commit e3c810b1a6ffee20de3fb6590218be4825c60f75
Author: 杨堃 <3047900358@qq.com>
Date:   Mon Jul 13 12:06:16 2026 +0800

    首次提交

diff --git a/.arkui-x/android/app/build.gradle b/.arkui-x/android/app/build.gradle
new file mode 100644
index 0000000..2e7e988
--- /dev/null
+++ b/.arkui-x/android/app/build.gradle
@@ -0,0 +1,49 @@
+plugins {
+    id 'com.android.application'
+}
+
+android {
+    compileSdkVersion 33
+    buildToolsVersion "30.0.3"
+
+    defaultConfig {
+        applicationId "com.example.waterapp"
+        minSdkVersion 26
+        targetSdkVersion 33
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
+
+        ndk {
+            abiFilters "arm64-v8a", "armeabi-v7a"
+        }
+    }
+
+    buildTypes {
+        release {
+            signingConfig signingConfigs.debug
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    dynamicFeatures = []
+
+    sourceSets {
+        main {
+            jniLibs.srcDirs = ['libs']
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar', '*.aar'])
+    testImplementation 'junit:junit:4.+'
+    androidTestImplementation 'com.android.support.test:runner:1.0.2'
+    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
+}
diff --git a/.arkui-x/android/app/proguard-rules.pro b/.arkui-x/android/app/proguard-rules.pro
new file mode 100644
index 0000000..481bb43
--- /dev/null
+++ b/.arkui-x/android/app/proguard-rules.pro
@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile
\ No newline at end of file
diff --git a/.arkui-x/android/app/src/androidTest/java/com/example/waterapp/ExampleInstrumentedTest.java b/.arkui-x/android/app/src/androidTest/java/com/example/waterapp/ExampleInstrumentedTest.java
new file mode 100644
index 0000000..64451ac
--- /dev/null
+++ b/.arkui-x/android/app/src/androidTest/java/com/example/waterapp/ExampleInstrumentedTest.java
@@ -0,0 +1,26 @@
+package com.example.waterapp;
+
+import android.content.Context;
+
+import android.support.test.InstrumentationRegistry;
+import android.support.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        assertEquals("com.example.waterapp", appContext.getPackageName());
+    }
+}
\ No newline at end of file
diff --git a/.arkui-x/android/app/src/main/AndroidManifest.xml b/.arkui-x/android/app/src/main/AndroidManifest.xml
new file mode 100644
index 0000000..bae623d
--- /dev/null
+++ b/.arkui-x/android/app/src/main/AndroidManifest.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.example.waterapp">
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <application
+            android:name=".MyApplication"
+            android:allowBackup="true"
+            android:icon="@drawable/arkuix"
+            android:label="@string/app_name"
+            android:extractNativeLibs="true"
+            android:supportsRtl="true"
+            android:theme="@android:style/Theme.Light.NoTitleBar">
+        <activity android:exported="true" android:name=".EntryEntryAbilityActivity"
+                  android:windowSoftInputMode="adjustResize |stateHidden"
+                  android:configChanges="orientation|keyboard|layoutDirection|screenSize|uiMode|smallestScreenSize|density"
+        >
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>
\ No newline at end of file
diff --git a/.arkui-x/android/app/src/main/java/com/example/waterapp/EntryEntryAbilityActivity.java b/.arkui-x/android/app/src/main/java/com/example/waterapp/EntryEntryAbilityActivity.java
new file mode 100644
index 0000000..ff1be68
--- /dev/null
+++ b/.arkui-x/android/app/src/main/java/com/example/waterapp/EntryEntryAbilityActivity.java
@@ -0,0 +1,24 @@
+package com.example.waterapp;
+
+import android.os.Bundle;
+import android.util.Log;
+
+import ohos.stage.ability.adapter.StageActivity;
+
+
+/**
+ * Example ace activity class, which will load ArkUI-X ability instance.
+ * StageActivity is provided by ArkUI-X
+ * @see <a href=
+ * "https://gitee.com/arkui-x/docs/blob/master/zh-cn/application-dev/tutorial/how-to-integrate-arkui-into-android.md">
+ * to build android library</a>
+ */
+public class EntryEntryAbilityActivity extends StageActivity {
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        Log.e("HiHelloWorld", "EntryEntryAbilityActivity");
+        
+        setInstanceName("com.example.waterapp:entry:EntryAbility:");
+        super.onCreate(savedInstanceState);
+    }
+}
diff --git a/.arkui-x/android/app/src/main/java/com/example/waterapp/MyApplication.java b/.arkui-x/android/app/src/main/java/com/example/waterapp/MyApplication.java
new file mode 100644
index 0000000..d253d0d
--- /dev/null
+++ b/.arkui-x/android/app/src/main/java/com/example/waterapp/MyApplication.java
@@ -0,0 +1,25 @@
+package com.example.waterapp;
+
+import android.util.Log;
+
+import ohos.stage.ability.adapter.StageApplication;
+
+/**
+ * Example ace application class, which will load ArkUI-X application instance.
+ * StageApplication is provided by ArkUI-X
+ * @see <a href=
+ * "https://gitee.com/arkui-x/docs/blob/master/zh-cn/application-dev/tutorial/how-to-integrate-arkui-into-android.md">
+ * to build android library</a>
+ */
+public class MyApplication extends StageApplication {
+    private static final String LOG_TAG = "HiHelloWorld";
+
+    private static final String RES_NAME = "res";
+
+    @Override
+    public void onCreate() {
+        Log.e(LOG_TAG, "MyApplication");
+        super.onCreate();
+        Log.e(LOG_TAG, "MyApplication onCreate");
+    }
+}
diff --git a/.arkui-x/android/app/src/main/res/drawable/arkuix.png b/.arkui-x/android/app/src/main/res/drawable/arkuix.png
new file mode 100644
index 0000000..ee0bdb1
Binary files /dev/null and b/.arkui-x/android/app/src/main/res/drawable/arkuix.png differ
diff --git a/.arkui-x/android/app/src/main/res/values/strings.xml b/.arkui-x/android/app/src/main/res/values/strings.xml
new file mode 100644
index 0000000..91c2f42
--- /dev/null
+++ b/.arkui-x/android/app/src/main/res/values/strings.xml
@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">Waterapp</string>
+</resources>
\ No newline at end of file
diff --git a/.arkui-x/android/app/src/test/java/com/example/waterapp/ExampleUnitTest.java b/.arkui-x/android/app/src/test/java/com/example/waterapp/ExampleUnitTest.java
new file mode 100644
index 0000000..c62cc35
--- /dev/null
+++ b/.arkui-x/android/app/src/test/java/com/example/waterapp/ExampleUnitTest.java
@@ -0,0 +1,17 @@
+package com.example.waterapp;
+
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+public class ExampleUnitTest {
+    @Test
+    public void addition_isCorrect() {
+        assertEquals(4, 2 + 2);
+    }
+}
\ No newline at end of file
diff --git a/.arkui-x/android/build.gradle b/.arkui-x/android/build.gradle
new file mode 100644
index 0000000..56d3693
--- /dev/null
+++ b/.arkui-x/android/build.gradle
@@ -0,0 +1,24 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+buildscript {
+    repositories {
+        google()
+        jcenter()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:7.4.1'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+allprojects {
+    repositories {
+        google()
+        jcenter()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}
\ No newline at end of file
diff --git a/.arkui-x/android/gradle.properties b/.arkui-x/android/gradle.properties
new file mode 100644
index 0000000..d52c760
--- /dev/null
+++ b/.arkui-x/android/gradle.properties
@@ -0,0 +1,19 @@
+# Project-wide Gradle settings.
+# IDE (e.g. Android Studio) users:
+# Gradle settings configured through the IDE *will override*
+# any settings specified in this file.
+# For more details on how to configure your build environment visit
+# http://www.gradle.org/docs/current/userguide/build_environment.html
+# Specifies the JVM arguments used for the daemon process.
+# The setting is particularly useful for tweaking memory settings.
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+# When configured, Gradle will run in incubating parallel mode.
+# This option should only be used with decoupled projects. More details, visit
+# http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
+# org.gradle.parallel=true
+# AndroidX package structure to make it clearer which packages are bundled with the
+# Android operating system, and which are packaged with your app"s APK
+# https://developer.android.com/topic/libraries/support-library/androidx-rn
+android.useAndroidX=false
+# Automatically convert third-party libraries to use AndroidX
+android.enableJetifier=false
\ No newline at end of file
diff --git a/.arkui-x/android/gradle/wrapper/gradle-wrapper.jar b/.arkui-x/android/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..490fda8
Binary files /dev/null and b/.arkui-x/android/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/.arkui-x/android/gradle/wrapper/gradle-wrapper.properties b/.arkui-x/android/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..483082e
--- /dev/null
+++ b/.arkui-x/android/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,6 @@
+#Thu Jan 07 16:36:34 CST 2021
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
+distributionUrl=https\://repo.huaweicloud.com/gradle/gradle-8.4-bin.zip
diff --git a/.arkui-x/android/gradlew b/.arkui-x/android/gradlew
new file mode 100644
index 0000000..6fe3981
--- /dev/null
+++ b/.arkui-x/android/gradlew
@@ -0,0 +1,172 @@
+#!/usr/bin/env sh
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS="-Dfile.encoding=UTF-8"
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=$((i+1))
+    done
+    case $i in
+        (0) set -- ;;
+        (1) set -- "$args0" ;;
+        (2) set -- "$args0" "$args1" ;;
+        (3) set -- "$args0" "$args1" "$args2" ;;
+        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
+if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
+  cd "$(dirname "$0")"
+fi
+
+exec "$JAVACMD" "$@"
diff --git a/.arkui-x/android/gradlew.bat b/.arkui-x/android/gradlew.bat
new file mode 100644
index 0000000..0dc644f
--- /dev/null
+++ b/.arkui-x/android/gradlew.bat
@@ -0,0 +1,100 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Dfile.encoding=GBK"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/.arkui-x/android/local.properties b/.arkui-x/android/local.properties
new file mode 100644
index 0000000..51a5f2e
--- /dev/null
+++ b/.arkui-x/android/local.properties
@@ -0,0 +1,7 @@
+## This file must *NOT* be checked into Version Control Systems,
+# as it contains information specific to your local configuration.
+#
+# Location of the SDK. This is only used by Gradle.
+# For customization when using a Version Control System, please read the
+# header note.
+sdk.dir=C:/development/Android/sdk
\ No newline at end of file
diff --git a/.arkui-x/android/settings.gradle b/.arkui-x/android/settings.gradle
new file mode 100644
index 0000000..d8fe027
--- /dev/null
+++ b/.arkui-x/android/settings.gradle
@@ -0,0 +1,2 @@
+    include ':app'
+rootProject.name = 'Waterapp'
\ No newline at end of file
diff --git a/.arkui-x/arkui-x-config.json5 b/.arkui-x/arkui-x-config.json5
new file mode 100644
index 0000000..5c89b86
--- /dev/null
+++ b/.arkui-x/arkui-x-config.json5
@@ -0,0 +1,6 @@
+{
+  "crossplatform": true,
+  "modules": [
+    "entry"
+  ]
+}
\ No newline at end of file
diff --git a/.arkui-x/ios/app.xcodeproj/project.pbxproj b/.arkui-x/ios/app.xcodeproj/project.pbxproj
new file mode 100644
index 0000000..9252fe0
--- /dev/null
+++ b/.arkui-x/ios/app.xcodeproj/project.pbxproj
@@ -0,0 +1,391 @@
+// !$*UTF8*$!
+{
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+	classes = {
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+	objects = {
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+		};
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+			files = (
+				89E41E4629F505CD0004F33E /* libarkui_ios.xcframework in Frameworks */,
+			);
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+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		F0AF1AC427D3684F008C55DD = {
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+			children = (
+				DFC5555529D7F36400B63EB3 /* arkui-x */,
+				F0AF1ACF27D3684F008C55DD /* app */,
+				F0AF1ACE27D3684F008C55DD /* Products */,
+				F0AF1AEB27D36948008C55DD /* Frameworks */,
+			);
+			sourceTree = "<group>";
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+		F0AF1ACE27D3684F008C55DD /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				F0AF1ACD27D3684F008C55DD /* app.app */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		F0AF1ACF27D3684F008C55DD /* app */ = {
+			isa = PBXGroup;
+			children = (
+				89E41E4429F505070004F33E /* EntryEntryAbilityViewController.h */,
+				89E41E4329F505070004F33E /* EntryEntryAbilityViewController.m */,
+				F0AF1AD027D3684F008C55DD /* AppDelegate.h */,
+				F0AF1AD127D3684F008C55DD /* AppDelegate.m */,
+				F0AF1ADC27D36856008C55DD /* Assets.xcassets */,
+				F0AF1ADE27D36856008C55DD /* LaunchScreen.storyboard */,
+				F0AF1AE127D36856008C55DD /* Info.plist */,
+				F0AF1AE227D36856008C55DD /* main.m */,
+			);
+			path = app;
+			sourceTree = "<group>";
+		};
+		F0AF1AEB27D36948008C55DD /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				DF9C1B5D28B9FC3A005DCF58 /* libarkui_ios.xcframework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		F0AF1ACC27D3684F008C55DD /* app */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = F0AF1AE627D36856008C55DD /* Build configuration list for PBXNativeTarget "app" */;
+			buildPhases = (
+				F0AF1AC927D3684F008C55DD /* Sources */,
+				F0AF1ACA27D3684F008C55DD /* Frameworks */,
+				F0AF1ACB27D3684F008C55DD /* Resources */,
+				89E41E4829F505CD0004F33E /* Embed Frameworks */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = app;
+			productName = app;
+			productReference = F0AF1ACD27D3684F008C55DD /* app.app */;
+			productType = "com.apple.product-type.application";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
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+			isa = PBXProject;
+			attributes = {
+				LastUpgradeCheck = 1300;
+				TargetAttributes = {
+					F0AF1ACC27D3684F008C55DD = {
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+					};
+				};
+			};
+			buildConfigurationList = F0AF1AC827D3684F008C55DD /* Build configuration list for PBXProject "app" */;
+			compatibilityVersion = "Xcode 9.3";
+			developmentRegion = en;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				en,
+				Base,
+			);
+			mainGroup = F0AF1AC427D3684F008C55DD;
+			productRefGroup = F0AF1ACE27D3684F008C55DD /* Products */;
+			projectDirPath = "";
+			projectRoot = "";
+			targets = (
+				F0AF1ACC27D3684F008C55DD /* app */,
+			);
+		};
+/* End PBXProject section */
+
+/* Begin PBXResourcesBuildPhase section */
+		F0AF1ACB27D3684F008C55DD /* Resources */ = {
+			isa = PBXResourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				F0AF1AE027D36856008C55DD /* LaunchScreen.storyboard in Resources */,
+				DFC5555629D7F36400B63EB3 /* arkui-x in Resources */,
+				F0AF1ADD27D36856008C55DD /* Assets.xcassets in Resources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXResourcesBuildPhase section */
+
+/* Begin PBXSourcesBuildPhase section */
+		F0AF1AC927D3684F008C55DD /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				F0AF1AD227D3684F008C55DD /* AppDelegate.m in Sources */,
+				89E41E4529F505070004F33E /* EntryEntryAbilityViewController.m in Sources */,
+				F0AF1AE327D36856008C55DD /* main.m in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXSourcesBuildPhase section */
+
+/* Begin PBXVariantGroup section */
+		F0AF1ADE27D36856008C55DD /* LaunchScreen.storyboard */ = {
+			isa = PBXVariantGroup;
+			children = (
+				F0AF1ADF27D36856008C55DD /* Base */,
+			);
+			name = LaunchScreen.storyboard;
+			sourceTree = "<group>";
+		};
+/* End PBXVariantGroup section */
+
+/* Begin XCBuildConfiguration section */
+		F0AF1AE427D36856008C55DD /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++17";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = dwarf;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				ENABLE_TESTABILITY = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu11;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
+				MTL_FAST_MATH = YES;
+				ONLY_ACTIVE_ARCH = YES;
+				SDKROOT = iphoneos;
+			};
+			name = Debug;
+		};
+		F0AF1AE527D36856008C55DD /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_ANALYZER_NONNULL = YES;
+				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++17";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_ENABLE_OBJC_WEAK = YES;
+				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_COMMA = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INFINITE_RECURSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
+				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
+				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
+				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
+				CLANG_WARN_STRICT_PROTOTYPES = YES;
+				CLANG_WARN_SUSPICIOUS_MOVE = YES;
+				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu11;
+				GCC_NO_COMMON_BLOCKS = YES;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				MTL_FAST_MATH = YES;
+				SDKROOT = iphoneos;
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		F0AF1AE727D36856008C55DD /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ARCHS = arm64;
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_IDENTITY = "Apple Development";
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEVELOPMENT_TEAM = JCS8W75JJS;
+				ENABLE_BITCODE = NO;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = app/Info.plist;
+				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
+				INFOPLIST_KEY_UILaunchStoryboardName = LaunchScreen;
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = "com.example.waterapp";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "no sign";
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/frameworks/libarkui_ios.xcframework/ios-arm64/libarkui_ios.framework/Headers/include";
+			};
+			name = Debug;
+		};
+		F0AF1AE827D36856008C55DD /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ARCHS = arm64;
+				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
+				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
+				CODE_SIGN_IDENTITY = "Apple Development";
+				CODE_SIGN_STYLE = Automatic;
+				CURRENT_PROJECT_VERSION = 1;
+				DEVELOPMENT_TEAM = JCS8W75JJS;
+				ENABLE_BITCODE = NO;
+				GENERATE_INFOPLIST_FILE = YES;
+				INFOPLIST_FILE = app/Info.plist;
+				INFOPLIST_KEY_UIApplicationSupportsIndirectInputEvents = YES;
+				INFOPLIST_KEY_UILaunchStoryboardName = LaunchScreen;
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPad = "UIInterfaceOrientationPortrait UIInterfaceOrientationPortraitUpsideDown UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				INFOPLIST_KEY_UISupportedInterfaceOrientations_iPhone = "UIInterfaceOrientationPortrait UIInterfaceOrientationLandscapeLeft UIInterfaceOrientationLandscapeRight";
+				IPHONEOS_DEPLOYMENT_TARGET = 10.0;
+				LD_RUNPATH_SEARCH_PATHS = (
+					"$(inherited)",
+					"@executable_path/Frameworks",
+				);
+				MARKETING_VERSION = 1.0;
+				PRODUCT_BUNDLE_IDENTIFIER = "com.example.waterapp";
+				PRODUCT_NAME = "$(TARGET_NAME)";
+				PROVISIONING_PROFILE_SPECIFIER = "no sign";
+				SWIFT_EMIT_LOC_STRINGS = YES;
+				TARGETED_DEVICE_FAMILY = "1,2";
+				USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/frameworks/libarkui_ios.xcframework/ios-arm64/libarkui_ios.framework/Headers/include";										
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		F0AF1AC827D3684F008C55DD /* Build configuration list for PBXProject "app" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				F0AF1AE427D36856008C55DD /* Debug */,
+				F0AF1AE527D36856008C55DD /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		F0AF1AE627D36856008C55DD /* Build configuration list for PBXNativeTarget "app" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				F0AF1AE727D36856008C55DD /* Debug */,
+				F0AF1AE827D36856008C55DD /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = F0AF1AC527D3684F008C55DD /* Project object */;
+}
diff --git a/.arkui-x/ios/app/AppDelegate.h b/.arkui-x/ios/app/AppDelegate.h
new file mode 100644
index 0000000..95f9bdd
--- /dev/null
+++ b/.arkui-x/ios/app/AppDelegate.h
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property (nonatomic, strong) UIWindow *window;
+
+@end
+
diff --git a/.arkui-x/ios/app/AppDelegate.m b/.arkui-x/ios/app/AppDelegate.m
new file mode 100644
index 0000000..8f7a4bf
--- /dev/null
+++ b/.arkui-x/ios/app/AppDelegate.m
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "AppDelegate.h"
+#import "EntryEntryAbilityViewController.h"
+#import <libarkui_ios/StageApplication.h>
+
+#define BUNDLE_DIRECTORY @"arkui-x"
+#define BUNDLE_NAME @"com.example.waterapp"
+
+@interface AppDelegate ()
+
+@end
+
+@implementation AppDelegate
+
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+    [StageApplication configModuleWithBundleDirectory:BUNDLE_DIRECTORY];
+    [StageApplication launchApplication];
+    
+    NSString *instanceName = [NSString stringWithFormat:@"%@:%@:%@",BUNDLE_NAME, @"entry", @"EntryAbility"];
+    EntryEntryAbilityViewController *mainView = [[EntryEntryAbilityViewController alloc] initWithInstanceName:instanceName];
+    [self setNavRootVC:mainView];
+    return YES;
+}
+
+- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString *,id> *)options {
+    NSLog(@"appdelegate openUrl callback, url : %@", url.absoluteString); // eg: (com.entry.arkui://entry?OtherAbility)
+
+    NSString *bundleName = url.scheme;
+    NSString *moduleName = url.host;
+    NSString *abilityName, *params;
+
+    NSURLComponents * urlComponents = [NSURLComponents componentsWithString:url.absoluteString];
+    NSArray <NSURLQueryItem *> *array = urlComponents.queryItems;
+        for (NSURLQueryItem * item in array) {
+        if ([item.name isEqualToString:@"abilityName"]) {
+        abilityName = item.value;
+        } else if ([item.name isEqualToString:@"params"]) {
+        params = item.value;
+        }
+        }
+
+        [self handleOpenUrlWithBundleName:bundleName
+        moduleName:moduleName
+        abilityName:abilityName
+        params:params, nil];
+
+        return YES;
+        }
+
+- (BOOL)handleOpenUrlWithBundleName:(NSString *)bundleName
+                         moduleName:(NSString *)moduleName
+                        abilityName:(NSString *)abilityName
+                             params:(NSString *)params, ...NS_REQUIRES_NIL_TERMINATION {
+    
+    id rootVC = [[UIApplication sharedApplication].delegate window].rootViewController;
+    BOOL hasRoot = NO;
+    if ([rootVC isKindOfClass:[UINavigationController class]]) {
+        hasRoot = YES;
+    }
+    
+    id subStageVC = nil;
+    
+    if ([moduleName isEqualToString:@"entry"] && [abilityName isEqualToString:@"EntryAbility"]) {
+        NSString *instanceName = [NSString stringWithFormat:@"%@:%@:%@",bundleName, moduleName, abilityName];
+        EntryEntryAbilityViewController *otherVC = [[EntryEntryAbilityViewController alloc] initWithInstanceName:instanceName];
+        subStageVC = (EntryEntryAbilityViewController *)otherVC;
+    } else if ([moduleName isEqualToString:@"entry"] && [abilityName isEqualToString:@"EntryAbility"]) {
+        NSString *instanceName = [NSString stringWithFormat:@"%@:%@:%@",bundleName, moduleName, abilityName];
+        EntryEntryAbilityViewController *otherVC = [[EntryEntryAbilityViewController alloc] initWithInstanceName:instanceName];
+        subStageVC = (EntryEntryAbilityViewController *)otherVC;
+    } // other ViewController
+    
+    if (!subStageVC) {
+        return NO;
+    }
+    
+    if (!hasRoot) {
+        [self setNavRootVC:subStageVC];
+    } else {
+        UINavigationController *rootNav = (UINavigationController *)self.window.rootViewController;
+        [rootNav pushViewController:subStageVC animated:YES];
+    }
+    return YES;
+}
+
+- (void)setNavRootVC:(id)viewController {
+    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
+    self.window.backgroundColor = [UIColor whiteColor];
+    [self.window makeKeyAndVisible];
+    UINavigationController *navi = [[UINavigationController alloc]initWithRootViewController:viewController];
+    [self setNaviAppearance:navi];
+    self.window.rootViewController = navi;
+}
+
+- (void)setNaviAppearance:(UINavigationController *)navi {
+    UINavigationBarAppearance *appearance = [UINavigationBarAppearance new];
+    [appearance configureWithOpaqueBackground];
+    appearance.backgroundColor = UIColor.whiteColor;
+    navi.navigationBar.standardAppearance = appearance;
+    navi.navigationBar.scrollEdgeAppearance = navi.navigationBar.standardAppearance;
+}
+
+@end
diff --git a/.arkui-x/ios/app/Assets.xcassets/AccentColor.colorset/Contents.json b/.arkui-x/ios/app/Assets.xcassets/AccentColor.colorset/Contents.json
new file mode 100644
index 0000000..eb87897
--- /dev/null
+++ b/.arkui-x/ios/app/Assets.xcassets/AccentColor.colorset/Contents.json
@@ -0,0 +1,11 @@
+{
+  "colors" : [
+    {
+      "idiom" : "universal"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
diff --git a/.arkui-x/ios/app/Assets.xcassets/AppIcon.appiconset/Contents.json b/.arkui-x/ios/app/Assets.xcassets/AppIcon.appiconset/Contents.json
new file mode 100644
index 0000000..9221b9b
--- /dev/null
+++ b/.arkui-x/ios/app/Assets.xcassets/AppIcon.appiconset/Contents.json
@@ -0,0 +1,98 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "60x60"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "20x20"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "40x40"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "1x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "76x76"
+    },
+    {
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "83.5x83.5"
+    },
+    {
+      "idiom" : "ios-marketing",
+      "scale" : "1x",
+      "size" : "1024x1024"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
diff --git a/.arkui-x/ios/app/Assets.xcassets/Contents.json b/.arkui-x/ios/app/Assets.xcassets/Contents.json
new file mode 100644
index 0000000..73c0059
--- /dev/null
+++ b/.arkui-x/ios/app/Assets.xcassets/Contents.json
@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}
diff --git a/.arkui-x/ios/app/Base.lproj/LaunchScreen.storyboard b/.arkui-x/ios/app/Base.lproj/LaunchScreen.storyboard
new file mode 100644
index 0000000..865e932
--- /dev/null
+++ b/.arkui-x/ios/app/Base.lproj/LaunchScreen.storyboard
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
+    <dependencies>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
+        <capability name="Safe area layout guides" minToolsVersion="9.0"/>
+        <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
+    </dependencies>
+    <scenes>
+        <!--View Controller-->
+        <scene sceneID="EHf-IW-A2E">
+            <objects>
+                <viewController id="01J-lp-oVM" sceneMemberID="viewController">
+                    <view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
+                        <rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                        <color key="backgroundColor" xcode11CocoaTouchSystemColor="systemBackgroundColor" cocoaTouchSystemColor="whiteColor"/>
+                        <viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
+                    </view>
+                </viewController>
+                <placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
+            </objects>
+            <point key="canvasLocation" x="53" y="375"/>
+        </scene>
+    </scenes>
+</document>
diff --git a/.arkui-x/ios/app/EntryEntryAbilityViewController.h b/.arkui-x/ios/app/EntryEntryAbilityViewController.h
new file mode 100644
index 0000000..cd8add4
--- /dev/null
+++ b/.arkui-x/ios/app/EntryEntryAbilityViewController.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef EntryEntryAbilityViewController_h
+#define EntryEntryAbilityViewController_h
+#import <UIKit/UIKit.h>
+#import <libarkui_ios/StageViewController.h>
+@interface EntryEntryAbilityViewController : StageViewController
+
+
+@end
+
+#endif /* EntryEntryAbilityViewController_h */
diff --git a/.arkui-x/ios/app/EntryEntryAbilityViewController.m b/.arkui-x/ios/app/EntryEntryAbilityViewController.m
new file mode 100644
index 0000000..4db6cc5
--- /dev/null
+++ b/.arkui-x/ios/app/EntryEntryAbilityViewController.m
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2023 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import "EntryEntryAbilityViewController.h"
+
+@interface EntryEntryAbilityViewController ()
+
+@end
+
+@implementation EntryEntryAbilityViewController
+- (instancetype)initWithInstanceName:(NSString *)instanceName {
+    self = [super initWithInstanceName:instanceName];
+    if (self) {
+
+    }
+    return self;
+}
+
+- (void)viewDidLoad {
+    [super viewDidLoad];
+
+    self.edgesForExtendedLayout = UIRectEdgeNone;
+    self.extendedLayoutIncludesOpaqueBars = YES;
+}
+@end
diff --git a/.arkui-x/ios/app/Info.plist b/.arkui-x/ios/app/Info.plist
new file mode 100644
index 0000000..0c67376
--- /dev/null
+++ b/.arkui-x/ios/app/Info.plist
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict/>
+</plist>
diff --git a/.arkui-x/ios/app/main.m b/.arkui-x/ios/app/main.m
new file mode 100644
index 0000000..c83b080
--- /dev/null
+++ b/.arkui-x/ios/app/main.m
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#import <UIKit/UIKit.h>
+#import "AppDelegate.h"
+
+int main(int argc, char * argv[]) {
+    NSString * appDelegateClassName;
+    @autoreleasepool {
+        // Setup code that might create autoreleased objects goes here.
+        appDelegateClassName = NSStringFromClass([AppDelegate class]);
+    }
+    return UIApplicationMain(argc, argv, nil, appDelegateClassName);
+}
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..d2ff201
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,12 @@
+/node_modules
+/oh_modules
+/local.properties
+/.idea
+**/build
+/.hvigor
+.cxx
+/.clangd
+/.clang-format
+/.clang-tidy
+**/.test
+/.appanalyzer
\ No newline at end of file
diff --git a/AppScope/app.json5 b/AppScope/app.json5
new file mode 100644
index 0000000..e636623
--- /dev/null
+++ b/AppScope/app.json5
@@ -0,0 +1,11 @@
+{
+  "app": {
+    "bundleName": "com.example.waterapp",
+    "vendor": "example",
+    "versionCode": 1000000,
+    "versionName": "1.0.0",
+    "buildVersion": "1",
+    "icon": "$media:layered_image",
+    "label": "$string:app_name"
+  }
+}
diff --git a/AppScope/resources/base/element/string.json b/AppScope/resources/base/element/string.json
new file mode 100644
index 0000000..be37fcd
--- /dev/null
+++ b/AppScope/resources/base/element/string.json
@@ -0,0 +1,8 @@
+{
+  "string": [
+    {
+      "name": "app_name",
+      "value": "Waterapp"
+    }
+  ]
+}
diff --git a/AppScope/resources/base/media/background.png b/AppScope/resources/base/media/background.png
new file mode 100644
index 0000000..923f2b3
Binary files /dev/null and b/AppScope/resources/base/media/background.png differ
diff --git a/AppScope/resources/base/media/foreground.png b/AppScope/resources/base/media/foreground.png
new file mode 100644
index 0000000..eb94275
Binary files /dev/null and b/AppScope/resources/base/media/foreground.png differ
diff --git a/AppScope/resources/base/media/layered_image.json b/AppScope/resources/base/media/layered_image.json
new file mode 100644
index 0000000..fb49920
--- /dev/null
+++ b/AppScope/resources/base/media/layered_image.json
@@ -0,0 +1,7 @@
+{
+  "layered-image":
+  {
+    "background" : "$media:background",
+    "foreground" : "$media:foreground"
+  }
+}
\ No newline at end of file
diff --git a/build-profile.json5 b/build-profile.json5
new file mode 100644
index 0000000..a2eaafc
--- /dev/null
+++ b/build-profile.json5
@@ -0,0 +1,42 @@
+{
+  "app": {
+    "signingConfigs": [],
+    "products": [
+      {
+        "name": "default",
+        "signingConfig": "default",
+        "targetSdkVersion": "6.1.0(23)",
+        "compatibleSdkVersion": "6.0.2(22)",
+        "runtimeOS": "HarmonyOS",
+        "buildOption": {
+          "strictMode": {
+            "caseSensitiveCheck": true,
+            "useNormalizedOHMUrl": false
+          }
+        }
+      }
+    ],
+    "buildModeSet": [
+      {
+        "name": "debug",
+      },
+      {
+        "name": "release"
+      }
+    ]
+  },
+  "modules": [
+    {
+      "name": "entry",
+      "srcPath": "./entry",
+      "targets": [
+        {
+          "name": "default",
+          "applyToProducts": [
+            "default"
+          ]
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/code-linter.json5 b/code-linter.json5
new file mode 100644
index 0000000..073990f
--- /dev/null
+++ b/code-linter.json5
@@ -0,0 +1,32 @@
+{
+  "files": [
+    "**/*.ets"
+  ],
+  "ignore": [
+    "**/src/ohosTest/**/*",
+    "**/src/test/**/*",
+    "**/src/mock/**/*",
+    "**/node_modules/**/*",
+    "**/oh_modules/**/*",
+    "**/build/**/*",
+    "**/.preview/**/*"
+  ],
+  "ruleSet": [
+    "plugin:@performance/recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "rules": {
+    "@security/no-unsafe-aes": "error",
+    "@security/no-unsafe-hash": "error",
+    "@security/no-unsafe-mac": "warn",
+    "@security/no-unsafe-dh": "error",
+    "@security/no-unsafe-dsa": "error",
+    "@security/no-unsafe-ecdsa": "error",
+    "@security/no-unsafe-rsa-encrypt": "error",
+    "@security/no-unsafe-rsa-sign": "error",
+    "@security/no-unsafe-rsa-key": "error",
+    "@security/no-unsafe-dsa-key": "error",
+    "@security/no-unsafe-dh-key": "error",
+    "@security/no-unsafe-3des": "error"
+  }
+}
\ No newline at end of file
diff --git a/entry/.gitignore b/entry/.gitignore
new file mode 100644
index 0000000..e2713a2
--- /dev/null
+++ b/entry/.gitignore
@@ -0,0 +1,6 @@
+/node_modules
+/oh_modules
+/.preview
+/build
+/.cxx
+/.test
\ No newline at end of file
diff --git a/entry/build-profile.json5 b/entry/build-profile.json5
new file mode 100644
index 0000000..6bd6457
--- /dev/null
+++ b/entry/build-profile.json5
@@ -0,0 +1,33 @@
+{
+  "apiType": "stageMode",
+  "buildOption": {
+    "resOptions": {
+      "copyCodeResource": {
+        "enable": false
+      }
+    }
+  },
+  "buildOptionSet": [
+    {
+      "name": "release",
+      "arkOptions": {
+        "obfuscation": {
+          "ruleOptions": {
+            "enable": false,
+            "files": [
+              "./obfuscation-rules.txt"
+            ]
+          }
+        }
+      }
+    },
+  ],
+  "targets": [
+    {
+      "name": "default"
+    },
+    {
+      "name": "ohosTest",
+    }
+  ]
+}
\ No newline at end of file
diff --git a/entry/hvigorfile.ts b/entry/hvigorfile.ts
new file mode 100644
index 0000000..57a9d6c
--- /dev/null
+++ b/entry/hvigorfile.ts
@@ -0,0 +1,2 @@
+// Script for compiling build behavior. It is built in the build plug-in and cannot be modified currently.
+export { HapTasks } from '@ohos/hvigor-ohos-arkui-x-plugin';
diff --git a/entry/obfuscation-rules.txt b/entry/obfuscation-rules.txt
new file mode 100644
index 0000000..1e7e54e
--- /dev/null
+++ b/entry/obfuscation-rules.txt
@@ -0,0 +1,23 @@
+# Define project specific obfuscation rules here.
+# You can include the obfuscation configuration files in the current module's build-profile.json5.
+#
+# For more details, see
+#   https://developer.huawei.com/consumer/cn/doc/harmonyos-guides/source-obfuscation
+
+# Obfuscation options:
+# -disable-obfuscation: disable all obfuscations
+# -enable-property-obfuscation: obfuscate the property names
+# -enable-toplevel-obfuscation: obfuscate the names in the global scope
+# -compact: remove unnecessary blank spaces and all line feeds
+# -remove-log: remove all console.* statements
+# -print-namecache: print the name cache that contains the mapping from the old names to new names
+# -apply-namecache: reuse the given cache file
+
+# Keep options:
+# -keep-property-name: specifies property names that you want to keep
+# -keep-global-name: specifies names that you want to keep in the global scope
+
+-enable-property-obfuscation
+-enable-toplevel-obfuscation
+-enable-filename-obfuscation
+-enable-export-obfuscation
\ No newline at end of file
diff --git a/entry/oh-package.json5 b/entry/oh-package.json5
new file mode 100644
index 0000000..248c3b7
--- /dev/null
+++ b/entry/oh-package.json5
@@ -0,0 +1,10 @@
+{
+  "name": "entry",
+  "version": "1.0.0",
+  "description": "Please describe the basic information.",
+  "main": "",
+  "author": "",
+  "license": "",
+  "dependencies": {}
+}
+
diff --git a/entry/src/main/ets/components/Add.ets b/entry/src/main/ets/components/Add.ets
new file mode 100644
index 0000000..be49f5b
--- /dev/null
+++ b/entry/src/main/ets/components/Add.ets
@@ -0,0 +1,161 @@
+import { promptAction } from '@kit.ArkUI';
+import DeviceListInterface from "../model/DeviceListInterface";
+
+/**
+ * 添加页面组件 - 科技蓝风格
+ */
+@Component
+export struct Add {
+  @State deviceCode: string = '';
+  @State deviceName: string = '';
+
+  // 确认添加设备
+  handleAddDevice(): void {
+    if (!this.deviceCode || !this.deviceName) {
+      promptAction.showToast({ message: '请填写完整信息' });
+      return;
+    }
+
+    // 创建新设备数据
+    const newDevice: DeviceListInterface = {
+      id: Date.now(),
+      name: this.deviceName,
+      code: this.deviceCode,
+      latitudeLongitude: '',
+      screenPosition: '',
+      status: 1  // 新添加的设备默认为正常状态
+    };
+
+    // 存储到AppStorage，供设备页面获取
+    AppStorage.setOrCreate('newDevice', newDevice);
+
+    promptAction.showToast({ message: '设备绑定成功' });
+
+    // 清空输入框
+    this.deviceCode = '';
+    this.deviceName = '';
+  }
+
+  build() {
+    Column() {
+      // 顶部标题栏 - 科技蓝风格
+      Row() {
+        Image($rawfile("add/添加 加号.png"))
+          .width(20)
+          .height(20)
+          .fillColor('#FFFFFF')
+          .margin({ left: 20, right: 10 })
+        Text("添加设备")
+          .fontSize(20)
+          .fontWeight(600)
+          .fontColor("#FFFFFF")
+
+        Blank()
+
+        Text('设备绑定')
+          .fontSize(12)
+          .fontColor('rgba(255,255,255,0.5)')
+      }
+      .width("100%")
+      .height(60)
+      .padding({ left: 10, right: 20 })
+      .alignItems(VerticalAlign.Center)
+
+      // 表单区域
+      Column({ space: 16 }) {
+        // 设备编号输入
+        Column({ space: 8 }) {
+          Text('设备编号')
+            .fontSize(12)
+            .fontColor('rgba(255,255,255,0.6)')
+            .width('100%')
+
+          Row() {
+            Image($rawfile("add/条形码.png"))
+              .width(18)
+              .height(18)
+              .fillColor('rgba(255,255,255,0.5)')
+              .margin({ left: 16 })
+            TextInput({ placeholder: "请输入设备编号", text: this.deviceCode })
+              .onChange((value: string) => {
+                this.deviceCode = value;
+              })
+              .backgroundColor(Color.Transparent)
+              .layoutWeight(1)
+              .placeholderColor('rgba(255,255,255,0.4)')
+              .fontColor('#FFFFFF')
+              .caretColor('#00FF88')
+          }
+          .width("100%")
+          .height(50)
+          .backgroundColor('rgba(22,119,255,0.15)')
+          .borderRadius(12)
+          .border({ width: 1, color: 'rgba(22,119,255,0.3)' })
+        }
+        .width('88%')
+        .alignItems(HorizontalAlign.Start)
+
+        // 设备名称输入
+        Column({ space: 8 }) {
+          Text('设备名称')
+            .fontSize(12)
+            .fontColor('rgba(255,255,255,0.6)')
+            .width('100%')
+
+          Row() {
+            Image($rawfile("add/编写.png"))
+              .width(18)
+              .height(18)
+              .fillColor('rgba(255,255,255,0.5)')
+              .margin({ left: 16 })
+            TextInput({ placeholder: "请输入设备名称", text: this.deviceName })
+              .onChange((value: string) => {
+                this.deviceName = value;
+              })
+              .backgroundColor(Color.Transparent)
+              .layoutWeight(1)
+              .placeholderColor('rgba(255,255,255,0.4)')
+              .fontColor('#FFFFFF')
+              .caretColor('#00FF88')
+          }
+          .width("100%")
+          .height(50)
+          .backgroundColor('rgba(22,119,255,0.15)')
+          .borderRadius(12)
+          .border({ width: 1, color: 'rgba(22,119,255,0.3)' })
+        }
+        .width('88%')
+        .alignItems(HorizontalAlign.Start)
+
+        // 确认按钮
+        Button("确认绑定")
+          .width("70%")
+          .height(45)
+          .fontSize(16)
+          .fontColor('#FFFFFF')
+          .fontWeight(FontWeight.Bold)
+          .backgroundColor('rgba(0,255,136,0.25)')
+          .borderRadius(22)
+          .border({ width: 1, color: 'rgba(0,255,136,0.4)' })
+          .onClick(() => {
+            this.handleAddDevice();
+          })
+
+        // 提示信息
+        Text('绑定后可在设备列表中查看')
+          .fontSize(12)
+          .fontColor('rgba(255,255,255,0.4)')
+          .margin({ top: 12 })
+      }
+      .width("100%")
+      .layoutWeight(1)
+      .justifyContent(FlexAlign.Center)
+    }
+    .width('100%')
+    .height('100%')
+    .linearGradient({
+      angle: 180,
+      colors: [['#0a1628', 0], ['#0d2847', 0.5], ['#1677FF', 1]]
+    })
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/components/CarbonCalc.ets b/entry/src/main/ets/components/CarbonCalc.ets
new file mode 100644
index 0000000..1623ab0
--- /dev/null
+++ b/entry/src/main/ets/components/CarbonCalc.ets
@@ -0,0 +1,320 @@
+import { webview } from '@kit.ArkWeb';
+import { http } from '@kit.NetworkKit';
+import CarbonInfoInterface from '../model/CarbonInfoInterface';
+import StatisticalInterface from '../model/StatisticalInterface';
+import DeviceListInterface from '../model/DeviceListInterface';
+import { getCarbonInfo, getCarbonList, getDeviceList } from '../utils/ApiService';
+
+// 监测点数据接口
+interface MonitorPoint {
+  name: string;
+  lat: number;
+  lng: number;
+  status: number;
+  color: string;
+}
+
+/**
+ * 碳汇计算组件
+ */
+@Component
+export struct CarbonCalc {
+  // 图表控制器
+  controller: webview.WebviewController = new webview.WebviewController();
+  // 状态数据
+  @State carbonInfo: CarbonInfoInterface | null = null;
+  @State carbonTrend: StatisticalInterface[] = [];
+  @State monitorPoints: MonitorPoint[] = [];
+  @State isLoading: boolean = true;
+  @State isWebViewReady: boolean = false;
+  @State avgTemp: number = 25.0;
+
+  // 模拟数据
+  private mockCarbonInfo: CarbonInfoInterface = {
+    carbonSequestration: 125.6,
+    ph: 7.4,
+    waterTemperature: 25.2
+  };
+
+  private mockTrend: number[] = [98, 105, 112, 118, 122, 126];
+
+  private mockPoints: MonitorPoint[] = [
+    { name: '长江监测点A', lat: 30.5, lng: 114.3, status: 1, color: '#00FF88' },
+    { name: '长江监测点B', lat: 31.2, lng: 115.1, status: 0, color: '#FF6B6B' },
+    { name: '长江监测点C', lat: 29.8, lng: 113.5, status: 1, color: '#00FF88' },
+    { name: '长江监测点D', lat: 32.0, lng: 118.7, status: 1, color: '#00FF88' }
+  ];
+
+  aboutToAppear(): void {
+    this.loadData();
+    setTimeout(() => {
+      this.isWebViewReady = true;
+      this.updateChart();
+    }, 1000);
+  }
+
+  loadData(): void {
+    this.carbonInfo = this.mockCarbonInfo;
+    this.monitorPoints = this.mockPoints;
+    this.avgTemp = this.mockCarbonInfo.waterTemperature;
+    this.isLoading = false;
+
+    // 尝试获取真实数据
+    getCarbonInfo().then((result) => {
+      if (result && result.data) {
+        this.carbonInfo = result.data;
+        this.avgTemp = result.data.waterTemperature;
+      }
+    }).catch(() => {
+      // 使用模拟数据
+    });
+
+    getCarbonList().then((result) => {
+      if (result && result.data && result.data.length > 0) {
+        this.carbonTrend = result.data;
+      }
+    }).catch(() => {
+      // 使用模拟数据
+    });
+
+    getDeviceList().then((result) => {
+      if (result && result.data && result.data.length > 0) {
+        this.parseDeviceData(result.data);
+      }
+    }).catch(() => {
+      // 使用模拟数据
+    });
+  }
+
+  parseDeviceData(devices: DeviceListInterface[]): void {
+    const points: MonitorPoint[] = [];
+    for (let i: number = 0; i < devices.length; i++) {
+      const device: DeviceListInterface = devices[i];
+      const coords: string[] = device.latitudeLongitude.split(',');
+      if (coords.length >= 2) {
+        const lat: number = parseFloat(coords[0]);
+        const lng: number = parseFloat(coords[1]);
+        points.push({
+          name: device.name,
+          lat: lat,
+          lng: lng,
+          status: device.status,
+          color: device.status === 1 ? '#00FF88' : '#FF6B6B'
+        });
+      }
+    }
+    if (points.length > 0) {
+      this.monitorPoints = points;
+    }
+  }
+
+  updateChart(): void {
+    if (!this.isWebViewReady) return;
+    try {
+      const jsCode: string = `updateData([${this.mockTrend.join(',')}])`;
+      this.controller.runJavaScript(jsCode);
+    } catch (e) {
+      console.error('图表更新失败');
+    }
+  }
+
+  build() {
+    Column() {
+      // 标题
+      Row() {
+        Text('碳汇计算')
+          .fontSize(18)
+          .fontWeight(FontWeight.Bold)
+          .fontColor('#FFFFFF')
+        Blank()
+        Text('水体固碳能力')
+          .fontSize(11)
+          .fontColor('rgba(255,255,255,0.5)')
+      }
+      .width('92%')
+      .padding({ top: 12, bottom: 8 })
+
+      // ===== 上部分：统计卡片 =====
+      Row({ space: 8 }) {
+        // 上月平均温度
+        Column({ space: 4 }) {
+          Text('上月平均温度')
+            .fontSize(11)
+            .fontColor('rgba(255,255,255,0.6)')
+          Text(this.avgTemp.toFixed(1) + '°C')
+            .fontSize(18)
+            .fontWeight(600)
+            .fontColor('#FFE66D')
+          Row() {
+            Circle().width(4).height(4).fill('#FFE66D')
+            Text('正常')
+              .fontSize(9)
+              .fontColor('rgba(255,255,255,0.5)')
+              .margin({ left: 3 })
+          }
+        }
+        .width('31%')
+        .height(70)
+        .padding(8)
+        .borderRadius(12)
+        .border({ width: 1, color: 'rgba(255,230,109,0.3)' })
+        .backgroundColor('rgba(255,230,109,0.08)')
+
+        // 上月碳汇能力
+        Column({ space: 4 }) {
+          Text('上月碳汇能力')
+            .fontSize(11)
+            .fontColor('rgba(255,255,255,0.6)')
+          Text((this.carbonInfo?.carbonSequestration ?? 0).toFixed(1) + 'kg')
+            .fontSize(18)
+            .fontWeight(600)
+            .fontColor('#00FF88')
+          Row() {
+            Circle().width(4).height(4).fill('#00FF88')
+            Text('良好')
+              .fontSize(9)
+              .fontColor('rgba(255,255,255,0.5)')
+              .margin({ left: 3 })
+          }
+        }
+        .width('31%')
+        .height(70)
+        .padding(8)
+        .borderRadius(12)
+        .border({ width: 1, color: 'rgba(0,255,136,0.3)' })
+        .backgroundColor('rgba(0,255,136,0.08)')
+
+        // 上月平均pH
+        Column({ space: 4 }) {
+          Text('上月平均pH')
+            .fontSize(11)
+            .fontColor('rgba(255,255,255,0.6)')
+          Text((this.carbonInfo?.ph ?? 0).toFixed(1))
+            .fontSize(18)
+            .fontWeight(600)
+            .fontColor('#4ECDC4')
+          Row() {
+            Circle().width(4).height(4).fill('#4ECDC4')
+            Text('达标')
+              .fontSize(9)
+              .fontColor('rgba(255,255,255,0.5)')
+              .margin({ left: 3 })
+          }
+        }
+        .width('31%')
+        .height(70)
+        .padding(8)
+        .borderRadius(12)
+        .border({ width: 1, color: 'rgba(78,205,196,0.3)' })
+        .backgroundColor('rgba(78,205,196,0.08)')
+      }
+      .width('92%')
+      .justifyContent(FlexAlign.SpaceBetween)
+
+      // ===== 中间部分：碳汇趋势折线图 =====
+      Column({ space: 6 }) {
+        Row() {
+          Text('碳汇趋势')
+            .fontSize(13)
+            .fontWeight(500)
+            .fontColor('#FFFFFF')
+          Blank()
+          Text('近6个月')
+            .fontSize(10)
+            .fontColor('rgba(255,255,255,0.5)')
+        }
+        .width('100%')
+
+        Web({ src: $rawfile('chart/carbon_chart.html'), controller: this.controller })
+          .width('100%')
+          .height(160)
+          .backgroundColor('transparent')
+          .javaScriptAccess(true)
+      }
+      .width('92%')
+      .padding(10)
+      .margin({ top: 8 })
+      .borderRadius(12)
+      .border({ width: 1, color: 'rgba(22,119,255,0.25)' })
+      .backgroundColor('rgba(13,40,71,0.5)')
+
+      // ===== 下部分：监测点分布地图 =====
+      Column({ space: 8 }) {
+        // 地图标题
+        Row() {
+          Text('监测点分布')
+            .fontSize(13)
+            .fontWeight(500)
+            .fontColor('#FFFFFF')
+          Blank()
+          Row({ space: 6 }) {
+            Row({ space: 3 }) {
+              Circle().width(5).height(5).fill('#00FF88')
+              Text('正常')
+                .fontSize(9)
+                .fontColor('rgba(255,255,255,0.6)')
+            }
+            Row({ space: 3 }) {
+              Circle().width(5).height(5).fill('#FF6B6B')
+              Text('异常')
+                .fontSize(9)
+                .fontColor('rgba(255,255,255,0.6)')
+            }
+          }
+        }
+        .width('100%')
+
+        // 监测点地图区域（图片占位符，后期添加图片后取消注释）
+        Image($rawfile('ces/all_point.png'))
+          .width('100%')
+          .height(180)
+          .borderRadius(12)
+          .border({ width: 1, color: 'rgba(22,119,255,0.3)' })
+
+        // 临时占位区域（待添加图片）
+        // Column()
+        //   .width('100%')
+        //   .height(180)
+        //   .linearGradient({
+        //     angle: 135,
+        //     colors: [['#1a3a5c', 0], ['#0d2847', 1]]
+        //   })
+        //   .borderRadius(12)
+        //   .border({ width: 1, color: 'rgba(22,119,255,0.3)' })
+
+        // 监测点列表
+        Row({ space: 10 }) {
+          ForEach(this.monitorPoints, (point: MonitorPoint) => {
+            Row({ space: 4 }) {
+              Circle()
+                .width(6)
+                .height(6)
+                .fill(point.color)
+              Text(point.name)
+                .fontSize(10)
+                .fontColor('rgba(255,255,255,0.8)')
+            }
+            .padding({ left: 6, right: 6, top: 4, bottom: 4 })
+            .borderRadius(8)
+            .backgroundColor('rgba(22,119,255,0.1)')
+          })
+        }
+        .width('100%')
+        .justifyContent(FlexAlign.Center)
+      }
+      .width('92%')
+      .layoutWeight(1)
+      .margin({ top: 8 })
+      .padding(10)
+      .borderRadius(12)
+      .border({ width: 1, color: 'rgba(22,119,255,0.25)' })
+      .backgroundColor('rgba(13,40,71,0.4)')
+    }
+    .width('100%')
+    .height('100%')
+    .linearGradient({
+      angle: 180,
+      colors: [['#0a1628', 0], ['#0d2847', 0.5], ['#1677FF', 1]]
+    })
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/components/ContrastAnalysis.ets b/entry/src/main/ets/components/ContrastAnalysis.ets
new file mode 100644
index 0000000..587fbbd
--- /dev/null
+++ b/entry/src/main/ets/components/ContrastAnalysis.ets
@@ -0,0 +1,457 @@
+import { webview } from '@kit.ArkWeb';
+import { buffer, JSON } from '@kit.ArkTS';
+import { http } from '@kit.NetworkKit';
+import { BusinessError } from '@kit.BasicServicesKit';
+import { getContrast } from '../utils/ApiService';
+import StatisticalInterface from '../model/StatisticalInterface';
+
+interface IndicatorConfig {
+  name: string;
+  unit: string;
+  color: string;
+  range: string;
+  data: number[];
+  paramType: number;
+}
+
+interface DifyStreamChunk {
+  event?: string;
+  answer?: string;
+  conversation_id?: string;
+  message?: string;
+}
+
+interface DifyChatRequestBody {
+  inputs: Record<string, string>;
+  query: string;
+  response_mode: 'streaming';
+  conversation_id: string;
+  user: string;
+}
+
+interface DifyErrorResponse {
+  message: string;
+  code?: number;
+}
+
+interface StatisticalItem {
+  month: string;
+  value: number;
+}
+
+@Component
+export struct ContrastAnalysis {
+  controller: webview.WebviewController = new webview.WebviewController();
+  @State currentIndicator: number = 0;
+  @State aiMessage: string = '';
+  @State isGenerating: boolean = false;
+  @State conversationId: string = '';
+  @State isWebReady: boolean = false;
+  @State isComponentActive: boolean = true;
+
+  private httpRequest: http.HttpRequest | null = null;
+  private sseBuffer: string = '';
+  private currentRequestIndicator: number = -1;
+
+  private readonly DIFY_BASE_URL: string = 'http://192.168.31.26';
+  private readonly DIFY_API_KEY: string = 'app-OeXDz5qppFhB4JMU9PQBEJai';
+
+  private indicators: IndicatorConfig[] = [
+    { name: '水温', unit: '°C', color: '#FFE66D', range: '15-30', data: [], paramType: 1 },
+    { name: 'COD', unit: 'mg/L', color: '#00FF88', range: '≤40', data: [], paramType: 2 },
+    { name: 'pH', unit: 'pH', color: '#4ECDC4', range: '6.5-8.5', data: [], paramType: 3 },
+    { name: '余氯', unit: 'mg/L', color: '#F38181', range: '0.3-0.5', data: [], paramType: 4 },
+    { name: '电导率', unit: 'μS/cm', color: '#95E1D3', range: '500-1500', data: [], paramType: 5 },
+    { name: '氨氮', unit: 'mg/L', color: '#FF6B6B', range: '≤1.0', data: [], paramType: 6 }
+  ];
+
+  aboutToAppear(): void {
+    this.isComponentActive = true;
+    this.aiMessage = '点击"AI分析"按钮，将自动分析当前选中的指标数据。';
+    this.isWebReady = false;
+    this.currentRequestIndicator = -1;
+  }
+
+  aboutToDisappear(): void {
+    this.isComponentActive = false;
+    this.isWebReady = false;
+    this.cancelRequest();
+  }
+
+  cancelRequest(): void {
+    this.isGenerating = false;
+    this.destroyRequest();
+    if (this.aiMessage && this.aiMessage !== '等待分析...') {
+      this.aiMessage += '\n[已取消请求]';
+    } else {
+      this.aiMessage = '已取消请求';
+    }
+  }
+
+  private destroyRequest(): void {
+    if (this.httpRequest) {
+      try {
+        this.httpRequest.destroy();
+      } catch (e) {
+        console.error('销毁HTTP请求失败', JSON.stringify(e));
+      }
+      this.httpRequest = null;
+    }
+    this.sseBuffer = '';
+  }
+
+  private runChartScript(script: string): void {
+    if (!this.isComponentActive || !this.isWebReady) {
+      return;
+    }
+    try {
+      this.controller.runJavaScript(script);
+      console.info('执行图表脚本：' + script);
+    } catch (e) {
+      console.error('图表脚本执行失败', JSON.stringify(e));
+    }
+  }
+
+  private buildChartDataFromContrast(rawList: StatisticalInterface[]): StatisticalItem[] {
+    return rawList.map((item: StatisticalInterface): StatisticalItem => ({
+      month: `${item.type}${item.date}月`,
+      value: Number(item.value) || 0
+    }));
+  }
+
+  async loadChartData(): Promise<void> {
+    const targetIndicator: number = this.currentIndicator;
+    this.currentRequestIndicator = targetIndicator;
+
+    try {
+      const config: IndicatorConfig = this.indicators[targetIndicator];
+      console.info('请求指标 paramType：' + config.paramType);
+
+      const res = await getContrast(config.paramType);
+
+      if (this.currentIndicator !== targetIndicator || !this.isComponentActive || !this.isWebReady) {
+        return;
+      }
+
+      const rawList: StatisticalInterface[] = res.data || [];
+      const chartData: StatisticalItem[] = this.buildChartDataFromContrast(rawList);
+      config.data = chartData.map((item: StatisticalItem): number => item.value);
+
+      this.runChartScript(`initChart(${JSON.stringify(chartData)})`);
+    } catch (err) {
+      console.error('加载图表数据失败', JSON.stringify(err));
+    } finally {
+      if (this.currentRequestIndicator === targetIndicator) {
+        this.currentRequestIndicator = -1;
+      }
+    }
+  }
+
+  onIndicatorChange(index: number): void {
+    this.currentIndicator = index;
+    this.loadChartData();
+  }
+
+  sendAiRequest(): void {
+    if (this.isGenerating || !this.isComponentActive) {
+      return;
+    }
+
+    const indicator: IndicatorConfig = this.indicators[this.currentIndicator];
+    const data: number[] = indicator.data;
+
+    if (!data.length) {
+      this.aiMessage = '暂无数据，无法分析';
+      return;
+    }
+
+    const avg: number = data.reduce((a: number, b: number): number => a + b, 0) / data.length;
+    const max: number = Math.max(...data);
+    const min: number = Math.min(...data);
+
+    const prompt: string =
+      `分析${indicator.name}指标年度数据：平均值${avg.toFixed(2)}${indicator.unit}，最高${max.toFixed(2)}${indicator.unit}，最低${min.toFixed(2)}${indicator.unit}，标准${indicator.range}。简要分析趋势并给出建议。`;
+
+    this.isGenerating = true;
+this.aiMessage = '';
+this.requestDifyInStream(prompt);
+}
+
+private bufferToStr(src: ArrayBuffer, encoding: buffer.BufferEncoding = 'utf-8'): string {
+  const buf: buffer.Buffer = buffer.from(src);
+  return buf.toString(encoding);
+}
+
+private requestDifyInStream(query: string): void {
+  if (!this.DIFY_API_KEY.trim() || !this.isComponentActive) {
+  this.aiMessage = 'Dify API Key 未配置';
+  this.isGenerating = false;
+  return;
+}
+
+this.destroyRequest();
+this.httpRequest = http.createHttp();
+this.sseBuffer = '';
+
+const url: string = this.DIFY_BASE_URL.replace(/\/+$/, '') + '/v1/chat-messages';
+
+const body: DifyChatRequestBody = {
+  inputs: {
+    "code": 'DEVICE0121',
+    "oldMonth": `${new Date().getFullYear() - 1}年${new Date().getMonth().toString().padStart(2, '0')}月`,
+    "newMonth": `${new Date().getFullYear()}年${new Date().getMonth().toString().padStart(2, '0')}月`
+  },
+  query: query,
+  user: 'qyl',
+  response_mode: 'streaming',
+  conversation_id: this.conversationId || ''
+};
+
+let isSseResponse: boolean = false;
+let rawNonSse: string = '';
+this.aiMessage = '连接中...';
+
+this.httpRequest.on('headersReceive', (headers: Object): void => {
+  if (!this.isComponentActive) {
+    return;
+  }
+  try {
+    const headerStr = JSON.stringify(headers).toLowerCase();
+    isSseResponse = headerStr.includes('text/event-stream');
+  } catch (e) {
+    console.error('解析响应头失败', JSON.stringify(e));
+  }
+});
+
+this.httpRequest.on('dataReceive', (data: ArrayBuffer): void => {
+  if (!this.isGenerating || !this.isComponentActive) {
+    return;
+  }
+
+  const chunk: string = this.bufferToStr(data);
+
+  if (isSseResponse) {
+    this.sseBuffer += chunk;
+    const events: string[] = this.sseBuffer.split('\n\n');
+    this.sseBuffer = events.pop() || '';
+
+    for (const event of events) {
+      const lines: string[] = event.split('\n');
+      let payload: string = '';
+
+      for (const line of lines) {
+        const trimLine: string = line.trim();
+        if (trimLine.startsWith('data:')) {
+          payload += trimLine.replace(/^data:\s*/, '');
+        }
+      }
+
+      if (!payload || payload === '[DONE]') {
+        continue;
+      }
+
+      try {
+        const js = JSON.parse(payload) as DifyStreamChunk;
+        if (js.event === 'message' || js.event === 'agent_message') {
+          if (this.aiMessage === '连接中...') {
+            this.aiMessage = '';
+          }
+          this.aiMessage += js.answer || '';
+          if (js.conversation_id) {
+            this.conversationId = js.conversation_id;
+          }
+        } else if (js.event === 'message_end') {
+          this.isGenerating = false;
+        } else if (js.event === 'error') {
+          this.aiMessage = 'Dify错误: ' + (js.message || '未知错误');
+          this.isGenerating = false;
+        }
+      } catch (e) {
+        console.error('解析SSE数据失败', JSON.stringify(e));
+      }
+    }
+  } else {
+    rawNonSse += chunk;
+  }
+});
+
+this.httpRequest.on('dataEnd', (): void => {
+  if (!this.isComponentActive) {
+    return;
+  }
+
+  if (!isSseResponse && rawNonSse.trim().length > 0) {
+    try {
+      const errJson = JSON.parse(rawNonSse) as DifyErrorResponse;
+      this.aiMessage = '错误：' + (errJson.message || rawNonSse);
+    } catch (e) {
+      this.aiMessage = rawNonSse;
+    }
+  } else if (this.aiMessage === '连接中...') {
+    this.aiMessage = '未收到有效数据';
+  }
+
+  this.isGenerating = false;
+  this.destroyRequest();
+});
+
+this.httpRequest.requestInStream(url, {
+  method: http.RequestMethod.POST,
+  header: {
+    Authorization: 'Bearer ' + this.DIFY_API_KEY,
+    'Content-Type': 'application/json'
+  },
+  extraData: JSON.stringify(body),
+  connectTimeout: 60000,
+  readTimeout: 120000
+}).catch((err: BusinessError): void => {
+  if (!this.isComponentActive) {
+    return;
+  }
+  this.aiMessage = '网络错误: ' + err.message;
+  this.isGenerating = false;
+  this.destroyRequest();
+});
+}
+
+build() {
+  Column() {
+    Row() {
+      Text('对比分析')
+        .fontSize(18)
+        .fontWeight(FontWeight.Bold)
+        .fontColor('#FFFFFF');
+      Blank();
+      Text('历年趋势')
+        .fontSize(11)
+        .fontColor('rgba(255,255,255,0.5)');
+    }
+    .width('92%')
+    .padding({ top: 12, bottom: 8 });
+
+    Column({ space: 10 }) {
+      Row() {
+        Row({ space: 6 }) {
+          Text(this.indicators[this.currentIndicator].name)
+            .fontSize(14)
+            .fontWeight(FontWeight.Bold)
+            .fontColor(this.indicators[this.currentIndicator].color);
+          Text('单位: ' + this.indicators[this.currentIndicator].unit)
+            .fontSize(11)
+            .fontColor('rgba(255,255,255,0.6)');
+        }
+        Blank();
+        Row({ space: 4 }) {
+          Button() {
+            Text('◀')
+              .fontSize(8)
+              .fontColor('#FFFFFF');
+          }
+          .width(20)
+          .height(20)
+          .onClick(() => {
+            this.onIndicatorChange(
+              this.currentIndicator > 0 ? this.currentIndicator - 1 : this.indicators.length - 1
+            );
+          });
+
+          Button() {
+            Text('▶')
+              .fontSize(8)
+              .fontColor('#FFFFFF');
+          }
+          .width(20)
+          .height(20)
+          .onClick(() => {
+            this.onIndicatorChange(
+              this.currentIndicator < this.indicators.length - 1 ? this.currentIndicator + 1 : 0
+            );
+          });
+        }
+      }
+
+      Row() {
+        Text('标准范围: ')
+          .fontSize(11)
+          .fontColor('rgba(255,255,255,0.5)');
+        Text(this.indicators[this.currentIndicator].range)
+          .fontSize(11)
+          .fontColor(this.indicators[this.currentIndicator].color);
+      }
+      .justifyContent(FlexAlign.Center);
+
+      Web({
+        src: $rawfile('chart/contrast_chart.html'),
+        controller: this.controller
+      })
+        .height(210)
+        .width('100%')
+        .javaScriptAccess(true)
+        .onPageBegin(() => {
+          this.isWebReady = false;
+        })
+        .onPageEnd(() => {
+          this.isWebReady = true;
+          this.loadChartData();
+        });
+    }
+    .width('92%')
+    .padding(12)
+    .borderRadius(14)
+    .border({ width: 1, color: 'rgba(22,119,255,0.25)' })
+    .backgroundColor('rgba(13,40,71,0.55)');
+
+    Column({ space: 8 }) {
+      Row() {
+        Row({ space: 6 }) {
+          Text('AI智能分析')
+            .fontSize(13)
+            .fontColor('#FFFFFF');
+        }
+        Blank();
+        Circle()
+          .width(5)
+          .height(5)
+          .fill(this.isGenerating ? '#00FF88' : '#1677FF');
+      }
+
+      Button(this.isGenerating ? '停止' : 'AI分析')
+        .width('100%')
+        .height(34)
+        .borderRadius(17)
+        .backgroundColor(this.isGenerating ? 'rgba(255,77,79,0.25)' : 'rgba(0,255,136,0.15)')
+        .fontColor('#FFFFFF')
+        .onClick(() => {
+          this.isGenerating ? this.cancelRequest() : this.sendAiRequest();
+        });
+
+      Scroll() {
+        Text(this.aiMessage || '等待分析...')
+          .fontSize(12)
+          .fontColor('rgba(255,255,255,0.9)')
+          .lineHeight(18)
+          .width('100%')
+          .padding(10);
+      }
+      .width('100%')
+      .layoutWeight(1)
+      .scrollBar(BarState.Auto)
+      .edgeEffect(EdgeEffect.Spring)
+      .borderRadius(10)
+      .backgroundColor('rgba(22,119,255,0.08)');
+    }
+    .width('92%')
+    .layoutWeight(1)
+    .margin({ top: 8 })
+    .padding(12)
+    .borderRadius(14)
+    .backgroundColor('rgba(13,40,71,0.4)');
+  }
+  .width('100%')
+  .height('100%')
+  .linearGradient({
+    angle: 180,
+    colors: [['#0a1628', 0], ['#0d2847', 0.5], ['#1677FF', 1]]
+  });
+}
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/components/DeviceAlarm.ets b/entry/src/main/ets/components/DeviceAlarm.ets
new file mode 100644
index 0000000..17dcdc3
--- /dev/null
+++ b/entry/src/main/ets/components/DeviceAlarm.ets
@@ -0,0 +1,581 @@
+import { getAlarmList, getAlarmStatistics } from '../utils/ApiService';
+import AlarmItemInterface from '../model/AlarmItemInterface';
+import AlarmStatisticsInterface from '../model/AlarmStatisticsInterface';
+import DeviceListInterface from '../model/DeviceListInterface';
+
+/**
+ * 设备报警组件
+ * 上部为地图区域，下部为设备报警列表
+ */
+@Component
+export struct DeviceAlarm {
+  // 报警列表数据
+  @State alarmList: AlarmItemInterface[] = [];
+  // 报警统计数据
+  @State alarmStatistics: AlarmStatisticsInterface | null = null;
+  // 加载状态
+  @State isLoading: boolean = true;
+  // 当前设备信息
+  private currentDevice: DeviceListInterface | null = null;
+
+  // 模拟报警数据（用于演示）
+  private mockAlarmList: AlarmItemInterface[] = [
+    {
+      deviceId: 1,
+      id: 1,
+      msg: 'pH值超标',
+      value: '9.2',
+      standard: '6.5-8.5',
+      coordinate: '30.5,114.3',
+      screenPosition: '',
+      createTime: '2026-05-01 14:32:00',
+      name: '长江监测点A',
+      code: 'DEVICE001'
+    },
+    {
+      deviceId: 2,
+      id: 2,
+      msg: '氨氮超标',
+      value: '1.8',
+      standard: '≤1.0',
+      coordinate: '31.2,115.1',
+      screenPosition: '',
+      createTime: '2026-05-01 10:15:00',
+      name: '长江监测点B',
+      code: 'DEVICE002'
+    },
+    {
+      deviceId: 1,
+      id: 3,
+      msg: 'COD超标',
+      value: '58',
+      standard: '≤40',
+      coordinate: '30.5,114.3',
+      screenPosition: '',
+      createTime: '2026-04-30 16:45:00',
+      name: '长江监测点A',
+      code: 'DEVICE001'
+    },
+    {
+      deviceId: 3,
+      id: 4,
+      msg: '电导率异常',
+      value: '1850',
+      standard: '500-1500',
+      coordinate: '29.8,113.5',
+      screenPosition: '',
+      createTime: '2026-04-30 08:20:00',
+      name: '长江监测点C',
+      code: 'DEVICE003'
+    },
+    {
+      deviceId: 2,
+      id: 5,
+      msg: '水温异常',
+      value: '35.5',
+      standard: '15-30',
+      coordinate: '31.2,115.1',
+      screenPosition: '',
+      createTime: '2026-04-29 11:30:00',
+      name: '长江监测点B',
+      code: 'DEVICE002'
+    }
+  ];
+
+  // 模拟统计数据
+  private mockStatistics: AlarmStatisticsInterface = {
+    todayCount: '3',
+    todayTrend: '1',
+    todayPercentage: '15',
+    weekCount: '12',
+    weekTrend: '0',
+    weekPercentage: '8',
+    monthCount: '28',
+    monthTrend: '1',
+    monthPercentage: '12'
+  };
+
+  // 科技蓝主色调
+  private primaryColor: string = '#1677FF';
+
+  aboutToAppear(): void {
+    // 从AppStorage获取当前设备信息
+    const device = AppStorage.get<DeviceListInterface>('point');
+    this.currentDevice = device ?? null;
+    // 加载报警数据
+    this.loadAlarmData();
+  }
+
+  // 加载报警数据
+  async loadAlarmData(): Promise<void> {
+    try {
+      // 获取报警列表
+      const listResult = await getAlarmList();
+      if (listResult && listResult.data && listResult.data.length > 0) {
+        this.alarmList = listResult.data;
+      } else {
+        // 如果API无数据，使用模拟数据
+        this.alarmList = this.mockAlarmList;
+      }
+
+      // 获取报警统计
+      const statsResult = await getAlarmStatistics();
+      if (statsResult && statsResult.data) {
+        this.alarmStatistics = statsResult.data;
+      } else {
+        // 如果API无数据，使用模拟数据
+        this.alarmStatistics = this.mockStatistics;
+      }
+    } catch (error) {
+      console.error('加载报警数据失败:', error);
+      // 加载失败时使用模拟数据
+      this.alarmList = this.mockAlarmList;
+      this.alarmStatistics = this.mockStatistics;
+    } finally {
+      this.isLoading = false;
+    }
+  }
+
+  // 计算水质超标数量
+  getWaterQualityAlarmCount(): number {
+    const keywords = ['pH', '氨氮', 'COD', '电导率', '水温', '余氯', '溶解氧'];
+    let count = 0;
+    this.alarmList.forEach((alarm: AlarmItemInterface) => {
+      if (alarm.msg && keywords.some(keyword => alarm.msg.includes(keyword))) {
+        count++;
+      }
+    });
+    return count;
+  }
+
+  // 格式化时间显示
+  formatTime(createTime: string): string {
+    if (!createTime) return '未知时间';
+    if (createTime.includes('-')) {
+      const parts = createTime.split(' ');
+      if (parts.length >= 2) {
+        const datePart = parts[0].substring(5);
+        const timePart = parts[1].substring(0, 5);
+        return `${datePart} ${timePart}`;
+      }
+    }
+    return createTime;
+  }
+
+  // 获取趋势图标
+  getTrendIcon(trend: string): string {
+    if (trend === '1') return '↑';
+    if (trend === '0') return '↓';
+    return '=';
+  }
+
+  // 获取趋势颜色
+  getTrendColor(trend: string): string {
+    if (trend === '1') return '#FF4D4F';
+    if (trend === '0') return '#52C41A';
+    return '#FFFFFF';
+  }
+
+  build() {
+    Stack({ alignContent: Alignment.TopStart }) {
+      // 科技蓝渐变背景
+      Column()
+        .width('100%')
+        .height('100%')
+        .linearGradient({
+          angle: 180,
+          colors: [['#0a1628', 0], ['#0d2847', 0.4], ['#1677FF', 1]]
+        })
+
+      // 内容区域
+      Column({ space: 16 }) {
+        // 标题区域
+        Row() {
+          Text("设备报警")
+            .fontSize(18)
+            .fontWeight(600)
+            .fontColor('#FFFFFF')
+
+          Blank()
+
+          Row({ space: 6 }) {
+            Circle()
+              .width(8)
+              .height(8)
+              .fill(this.primaryColor)
+            Text(`${this.alarmList.length} 条报警`)
+              .fontSize(11)
+              .fontColor('rgba(255,255,255,0.7)')
+          }
+        }
+        .width('92%')
+        .padding({ top: 16, bottom: 8 })
+
+        // ===== 报警数量统计卡片 =====
+        Row({ space: 10 }) {
+          // 总报警数量
+          Column({ space: 6 }) {
+            Row({ space: 6 }) {
+              Image($rawfile('Equipment/设备管理.png'))
+                .width(16)
+                .height(16)
+                .fillColor('#FFFFFF')
+              Text("报警数量")
+                .fontSize(12)
+                .fontColor('rgba(255,255,255,0.8)')
+            }
+            Text(`${this.alarmList.length}`)
+              .fontSize(28)
+              .fontWeight(700)
+              .fontColor('#FFFFFF')
+
+          }
+          .width('48%')
+          .height(80)
+          .backgroundColor('rgba(22,119,255,0.3)')
+          .borderRadius(12)
+          .justifyContent(FlexAlign.Center)
+          .borderWidth(1)
+          .borderColor('rgba(255,255,255,0.2)')
+
+          // 水质超标数量
+          Column({ space: 6 }) {
+            Row({ space: 6 }) {
+              Column()
+                .width(16)
+                .height(16)
+                .borderRadius(8)
+                .backgroundColor('#FF4D4F')
+              Text("水质超标")
+                .fontSize(12)
+                .fontColor('rgba(255,255,255,0.8)')
+            }
+            Text(`${this.getWaterQualityAlarmCount()}`)
+              .fontSize(28)
+              .fontWeight(700)
+              .fontColor('#FFFFFF')
+
+          }
+          .width('48%')
+          .height(80)
+          .backgroundColor('rgba(255,77,79,0.2)')
+          .borderRadius(12)
+          .justifyContent(FlexAlign.Center)
+          .borderWidth(1)
+          .borderColor('rgba(255,77,79,0.3)')
+        }
+        .width('92%')
+
+        // ===== 地图区域 =====
+        Column() {
+          Stack({ alignContent: Alignment.Center }) {
+            // 地图背景 - 科技蓝风格
+            Column()
+              .width('100%')
+              .height('100%')
+              .linearGradient({
+                angle: 135,
+                colors: [['#1a3a5c', 0], ['#0d2847', 1]]
+              })
+
+            // 模拟地图网格线
+            Column() {
+              ForEach([0, 1, 2, 3, 4], (row: number) => {
+                Row() {
+                  ForEach([0, 1, 2, 3, 4, 5], (col: number) => {
+                    Column()
+                      .width('16%')
+                      .height('20%')
+                      .borderWidth(0.5)
+                      .borderColor('rgba(22,119,255,0.2)')
+                  })
+                }
+                .width('100%')
+                .height('20%')
+              })
+            }
+            .width('100%')
+            .height('100%')
+
+            // 设备位置标记点
+            if (this.currentDevice) {
+              Column({ space: 4 }) {
+                Stack({ alignContent: Alignment.Center }) {
+                  Column()
+                    .width(40)
+                    .height(40)
+                    .borderRadius(20)
+                    .backgroundColor('rgba(22,119,255,0.4)')
+
+                  Column()
+                    .width(20)
+                    .height(20)
+                    .borderRadius(10)
+                    .backgroundColor(this.primaryColor)
+
+                  Column()
+                    .width(8)
+                    .height(8)
+                    .borderRadius(4)
+                    .backgroundColor('#FFFFFF')
+                }
+
+                Column() {
+                  Text(this.currentDevice.name || '监测点')
+                    .fontSize(10)
+                    .fontColor('#FFFFFF')
+                    .fontWeight(500)
+                }
+                .backgroundColor('rgba(22,119,255,0.8)')
+                .borderRadius(4)
+                .padding({ left: 8, right: 8, top: 4, bottom: 4 })
+              }
+              .position({ x: '45%', y: '40%' })
+            }
+
+            // 坐标信息
+            Column() {
+              Row({ space: 8 }) {
+                Image($rawfile('Equipment/设备管理.png'))
+                  .width(14)
+                  .height(14)
+                  .fillColor('#FFFFFF')
+                if (this.currentDevice) {
+                  Text(`坐标: ${this.currentDevice.latitudeLongitude || '未设置'}`)
+                    .fontSize(11)
+                    .fontColor('rgba(255,255,255,0.7)')
+                } else {
+                  Text('坐标: 未获取')
+                    .fontSize(11)
+                    .fontColor('rgba(255,255,255,0.7)')
+                }
+              }
+            }
+            .position({ x: 12, y: 12 })
+          }
+          .width('92%')
+          .height('28%')
+          .borderRadius(12)
+          .clip(true)
+          .borderWidth(1)
+          .borderColor('rgba(22,119,255,0.3)')
+        }
+        .width('92%')
+
+        // ===== 时间段统计 =====
+        if (this.alarmStatistics) {
+          Row({ space: 10 }) {
+            this.StatisticsCard('今日', this.alarmStatistics.todayCount,
+              this.alarmStatistics.todayTrend, this.alarmStatistics.todayPercentage)
+            this.StatisticsCard('本周', this.alarmStatistics.weekCount,
+              this.alarmStatistics.weekTrend, this.alarmStatistics.weekPercentage)
+            this.StatisticsCard('本月', this.alarmStatistics.monthCount,
+              this.alarmStatistics.monthTrend, this.alarmStatistics.monthPercentage)
+          }
+          .width('92%')
+        }
+
+        // ===== 报警列表 =====
+        Column() {
+          Row() {
+            Text("报警记录")
+              .fontSize(14)
+              .fontWeight(500)
+              .fontColor('#333333')
+
+            Blank()
+
+            Text(`共${this.alarmList.length}条`)
+              .fontSize(12)
+              .fontColor('#999999')
+          }
+          .width('100%')
+          .padding({ left: 14, right: 14, top: 12, bottom: 8 })
+
+          if (this.isLoading) {
+            Column() {
+              Text("加载中...")
+                .fontSize(14)
+                .fontColor('#999999')
+            }
+            .width('100%')
+            .height(150)
+            .justifyContent(FlexAlign.Center)
+          } else if (this.alarmList.length === 0) {
+            Column() {
+              Image($rawfile('Equipment/设备管理.png'))
+                .width(40)
+                .height(40)
+                .fillColor('#CCCCCC')
+              Text("暂无报警记录")
+                .fontSize(14)
+                .fontColor('#999999')
+                .margin({ top: 8 })
+            }
+            .width('100%')
+            .height(150)
+            .justifyContent(FlexAlign.Center)
+          } else {
+            Scroll() {
+              Column({ space: 12 }) {
+                ForEach(this.alarmList, (alarm: AlarmItemInterface, index: number) => {
+                  this.AlarmCard(alarm, index)
+                })
+              }
+              .width('100%')
+              .padding({ left: 14, right: 14, top: 8, bottom: 16 })
+            }
+            .width('100%')
+            .layoutWeight(1)
+            .scrollBar(BarState.Auto)
+            .edgeEffect(EdgeEffect.Spring)
+          }
+        }
+        .width('92%')
+        .layoutWeight(1)
+        .backgroundColor('#FFFFFF')
+        .borderRadius({ topLeft: 12, topRight: 12 })
+      }
+      .width('100%')
+      .height('100%')
+      .justifyContent(FlexAlign.Start)
+    }
+    .width('100%')
+    .height('100%')
+  }
+
+  @Builder
+  StatisticsCard(title: string, count: string, trend: string, percentage: string) {
+    Column({ space: 6 }) {
+      Text(title)
+        .fontSize(11)
+        .fontColor('rgba(255,255,255,0.7)')
+
+      Row({ space: 4 }) {
+        Text(count)
+          .fontSize(18)
+          .fontWeight(600)
+          .fontColor('#FFFFFF')
+
+        Text(this.getTrendIcon(trend))
+          .fontSize(12)
+          .fontColor(this.getTrendColor(trend))
+      }
+
+      Text(`${percentage}%`)
+        .fontSize(10)
+        .fontColor('rgba(255,255,255,0.5)')
+    }
+    .width('31%')
+    .height(60)
+    .backgroundColor('rgba(255,255,255,0.1)')
+    .borderRadius(8)
+    .justifyContent(FlexAlign.Center)
+    .borderWidth(1)
+    .borderColor('rgba(255,255,255,0.2)')
+  }
+
+  @Builder
+  AlarmCard(alarm: AlarmItemInterface, index: number) {
+    Column({ space: 10 }) {
+      Row() {
+        Row({ space: 4 }) {
+          Image($rawfile('Equipment/设备管理.png'))
+            .width(12)
+            .height(12)
+            .fillColor(this.primaryColor)
+          Text(alarm.code || '未知设备')
+            .fontSize(12)
+            .fontWeight(500)
+            .fontColor(this.primaryColor)
+        }
+        .backgroundColor('#E6F4FF')
+        .borderRadius(4)
+        .padding({ left: 8, right: 8, top: 4, bottom: 4 })
+
+        Blank()
+
+        Row({ space: 4 }) {
+          Text("掉线时间:")
+            .fontSize(11)
+            .fontColor('#999999')
+          Text(this.formatTime(alarm.createTime))
+            .fontSize(11)
+            .fontWeight(500)
+            .fontColor('#666666')
+        }
+      }
+      .width('100%')
+
+      Column({ space: 6 }) {
+        Row({ space: 8 }) {
+          Text("水质情况:")
+            .fontSize(12)
+            .fontColor('#333333')
+
+          Blank()
+
+          Text(alarm.msg || '异常')
+            .fontSize(13)
+            .fontWeight(500)
+            .fontColor('#FF4D4F')
+            .maxLines(1)
+            .textOverflow({ overflow: TextOverflow.Ellipsis })
+        }
+        .width('100%')
+
+        Row({ space: 12 }) {
+          Column({ space: 4 }) {
+            Text("当前值")
+              .fontSize(10)
+              .fontColor('#999999')
+            Text(alarm.value || '-')
+              .fontSize(14)
+              .fontWeight(600)
+              .fontColor('#FF4D4F')
+          }
+          .alignItems(HorizontalAlign.Start)
+
+          Column()
+            .width(1)
+            .height(30)
+            .backgroundColor('#E5E5E5')
+
+          Column({ space: 4 }) {
+            Text("标准值")
+              .fontSize(10)
+              .fontColor('#999999')
+            Text(alarm.standard || '-')
+              .fontSize(14)
+              .fontWeight(600)
+              .fontColor('#52C41A')
+          }
+          .alignItems(HorizontalAlign.Start)
+
+          Blank()
+
+          Text(`#${index + 1}`)
+            .fontSize(10)
+            .fontColor('#CCCCCC')
+        }
+        .width('100%')
+      }
+      .width('100%')
+      .backgroundColor('#F5F5F5')
+      .borderRadius(8)
+      .padding(12)
+    }
+    .width('100%')
+    .backgroundColor('#FFFFFF')
+    .borderRadius(12)
+    .padding(14)
+    .borderWidth(1)
+    .borderColor('rgba(22,119,255,0.15)')
+    .shadow({
+      radius: 4,
+      color: 'rgba(0,0,0,0.05)',
+      offsetX: 0,
+      offsetY: 2
+    })
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/components/Equipment.ets b/entry/src/main/ets/components/Equipment.ets
new file mode 100644
index 0000000..354cbaf
--- /dev/null
+++ b/entry/src/main/ets/components/Equipment.ets
@@ -0,0 +1,151 @@
+import { router } from "@kit.ArkUI";
+import DeviceListInterface from "../model/DeviceListInterface";
+
+/**
+ * 设备页面组件 - 科技蓝风格
+ */
+@Component
+export struct Equipment {
+  // 设备列表数据
+  @State deviceList: DeviceListInterface[] = [
+    {
+      id: 1,
+      name: '长江监测点A',
+      code: 'DEVICE001',
+      latitudeLongitude: '30.5,114.3',
+      screenPosition: '',
+      status: 1  // 正常
+    },
+    {
+      id: 2,
+      name: '长江监测点B',
+      code: 'DEVICE002',
+      latitudeLongitude: '31.2,115.1',
+      screenPosition: '',
+      status: 0  // 异常
+    }
+  ];
+
+  aboutToAppear(): void {
+    // 从AppStorage获取新添加的设备
+    const newDevice = AppStorage.get<DeviceListInterface>('newDevice');
+    if (newDevice) {
+      // 添加到设备列表
+      this.deviceList = [
+        {
+          id: 1,
+          name: '长江监测点A',
+          code: 'DEVICE001',
+          latitudeLongitude: '30.5,114.3',
+          screenPosition: '',
+          status: 1
+        },
+        {
+          id: 2,
+          name: '长江监测点B',
+          code: 'DEVICE002',
+          latitudeLongitude: '31.2,115.1',
+          screenPosition: '',
+          status: 0
+        },
+        newDevice
+      ];
+      // 清除临时存储
+      AppStorage.delete('newDevice');
+    }
+  }
+
+  build() {
+    Column() {
+      // 顶部标题栏 - 科技蓝风格
+      Row() {
+        Image($rawfile("Equipment/设备管理.png"))
+          .width(20)
+          .height(20)
+          .fillColor('#FFFFFF')
+          .margin({ left: 20, right: 10 })
+        Text("设备管理")
+          .fontSize(20)
+          .fontWeight(600)
+          .fontColor("#FFFFFF")
+
+        Blank()
+
+        Row({ space: 6 }) {
+          Circle()
+            .width(8)
+            .height(8)
+            .fill('#00FF88')
+          Text(`${this.deviceList.length} 台`)
+            .fontSize(12)
+            .fontColor('rgba(255,255,255,0.7)')
+        }
+      }
+      .width("100%")
+      .height(60)
+      .padding({ left: 10, right: 20 })
+      .alignItems(VerticalAlign.Center)
+
+      // 设备列表区域
+      Column({ space: 12 }) {
+        ForEach(this.deviceList, (device: DeviceListInterface) => {
+          Row() {
+            Column() {
+              Row({ space: 10 }) {
+                Text(device.name)
+                  .fontSize(16)
+                  .fontWeight(FontWeight.Bold)
+                  .fontColor('#FFFFFF')
+                Text(device.code)
+                  .fontSize(12)
+                  .fontColor('rgba(255,255,255,0.6)')
+              }
+              Row({ space: 6 }) {
+                Circle()
+                  .width(6)
+                  .height(6)
+                  .fill(device.status === 1 ? '#00FF88' : '#FF6B6B')
+                Text(device.status === 1 ? "正常运行中" : "异常报警")
+                  .fontColor(device.status === 1 ? '#00FF88' : '#FF6B6B')
+                  .fontSize(12)
+              }
+              .margin({ top: 8 })
+            }
+            .alignItems(HorizontalAlign.Start)
+            .margin({ left: 16 })
+
+            Blank()
+
+            Image($rawfile("Equipment/右括号.png"))
+              .width(18)
+              .height(18)
+              .fillColor('rgba(255,255,255,0.5)')
+              .margin({ right: 16 })
+          }
+          .width("92%")
+          .height(80)
+          .backgroundColor('rgba(22,119,255,0.15)')
+          .borderRadius(12)
+          .border({ width: 1, color: 'rgba(22,119,255,0.3)' })
+          .justifyContent(FlexAlign.SpaceBetween)
+          .alignItems(VerticalAlign.Center)
+          .onClick(() => {
+            // 存储当前设备信息供详情页使用（使用point作为key，与ApiService保持一致）
+            AppStorage.setOrCreate('point', device);
+            router.pushUrl({ url: 'pages/Details' });
+          })
+        })
+      }
+      .width("100%")
+      .layoutWeight(1)
+      .padding({ top: 16 })
+      .justifyContent(FlexAlign.Center)
+    }
+    .width('100%')
+    .height('100%')
+    .linearGradient({
+      angle: 180,
+      colors: [['#0a1628', 0], ['#0d2847', 0.5], ['#1677FF', 1]]
+    })
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/components/WaterMonitor.ets b/entry/src/main/ets/components/WaterMonitor.ets
new file mode 100644
index 0000000..9b11b5f
--- /dev/null
+++ b/entry/src/main/ets/components/WaterMonitor.ets
@@ -0,0 +1,354 @@
+import { webview } from '@kit.ArkWeb';
+import MqttService, { WaterQualityData, SimpleEmitterUtil } from '../utils/MqttService';
+
+// 水质指标数据接口
+interface IndicatorData {
+  name: string;
+  value: number;
+  unit: string;
+  color: string;
+  bgColor: string;
+  minValue: number;
+  maxValue: number;
+  normalRange: string;
+}
+
+/**
+ * 水情检测组件
+ */
+@Component
+export struct WaterMonitor {
+  chartWebviewController: webview.WebviewController = new webview.WebviewController();
+  private mqttService: MqttService = MqttService.getInstance();
+  private refreshTimer: number = -1;
+  private chartUpdateTimer: number = -1;
+
+  // 最新MQTT数据缓冲
+  private latestData: WaterQualityData = {
+    temperature: 0, ph: 0, conductivity: 0,
+    cod: 0, ammonia: 0, chlorine: 0, timestamp: 0
+  };
+
+  // 当前UI显示的水质数据
+  @State currentData: WaterQualityData = {
+    temperature: 25.5, ph: 7.2, conductivity: 850,
+    cod: 28.5, ammonia: 0.35, chlorine: 0.42, timestamp: Date.now()
+  };
+
+  // 连接状态
+  @State isConnected: boolean = false;
+
+  // 是否有真实数据
+  @State hasRealData: boolean = false;
+
+  // WebView是否加载完成
+  @State isWebViewReady: boolean = false;
+
+  // 基本水质指标配置
+  private basicIndicators: IndicatorData[] = [
+    { name: '水温', value: 0, unit: '°C', color: '#1677FF', bgColor: '#E6F4FF', minValue: 0, maxValue: 40, normalRange: '15-30°C' },
+    { name: 'pH值', value: 0, unit: '', color: '#52C41A', bgColor: '#F6FFED', minValue: 0, maxValue: 14, normalRange: '6.5-8.5' },
+    { name: '电导率', value: 0, unit: 'μS/cm', color: '#722ED1', bgColor: '#F9F0FF', minValue: 0, maxValue: 2000, normalRange: '500-1500' },
+    { name: 'COD', value: 0, unit: 'mg/L', color: '#13C2C2', bgColor: '#E6FFFB', minValue: 0, maxValue: 100, normalRange: '≤40' }
+  ];
+
+  aboutToAppear(): void {
+    // 配置MQTT连接参数
+    this.mqttService.setConfig('tcp://192.168.31.100:1883', 'sea_status');
+
+    // 使用SimpleEmitterUtil订阅MQTT消息
+    SimpleEmitterUtil.on((payload: string) => {
+      if (payload) {
+        this.latestData = this.mqttService.parseWaterQualityData(payload);
+        this.isConnected = true;
+        this.hasRealData = true;
+      }
+    });
+
+    // 异步连接MQTT
+    this.mqttService.connect().then(() => {
+      this.isConnected = this.mqttService.getConnectionStatus();
+    });
+
+    // 每4秒刷新一次UI数据
+    this.refreshTimer = setInterval(() => {
+      if (this.hasRealData) {
+        // 使用真实MQTT数据
+        this.currentData = this.latestData;
+      } else {
+        // 使用模拟数据
+        try {
+
+        }catch (e) {
+          console.error("mqtt_err:", JSON.stringify(e))
+        }
+      }
+    }, 4000);
+
+    // 每5秒更新图表（延迟启动，等待WebView加载）
+    setTimeout(() => {
+      this.startChartUpdate();
+    }, 2000);
+  }
+
+  aboutToDisappear(): void {
+    // 清除定时器
+    if (this.refreshTimer >= 0) {
+      clearInterval(this.refreshTimer);
+      this.refreshTimer = -1;
+    }
+    if (this.chartUpdateTimer >= 0) {
+      clearInterval(this.chartUpdateTimer);
+      this.chartUpdateTimer = -1;
+    }
+    // 取消订阅
+    SimpleEmitterUtil.off();
+    // 断开MQTT
+    this.mqttService.disconnect();
+  }
+
+  
+
+  // 启动图表更新定时器
+  startChartUpdate(): void {
+    this.isWebViewReady = true;
+    // 立即更新一次
+    this.updateChartData();
+
+    // 每5秒更新图表
+    this.chartUpdateTimer = setInterval(() => {
+      this.updateChartData();
+    }, 5000);
+  }
+
+  updateChartData(): void {
+    try {
+      const chlorine: number = this.currentData.chlorine ?? 0;
+      const ammonia: number = this.currentData.ammonia ?? 0;
+      const jsCode: string = `updateData(${chlorine.toFixed(3)}, ${ammonia.toFixed(3)})`;
+      this.chartWebviewController.runJavaScript(jsCode);
+      console.info('图表更新: chlorine=' + chlorine.toFixed(3) + ', ammonia=' + ammonia.toFixed(3));
+    } catch (error) {
+      const errMsg: string = String(error);
+      console.error('更新图表失败: ' + errMsg);
+    }
+  }
+
+  // 获取数值显示
+  getValueByIndex(index: number): string {
+    const temp = this.currentData.temperature ?? 0;
+    const ph = this.currentData.ph ?? 0;
+    const conductivity = this.currentData.conductivity ?? 0;
+    const cod = this.currentData.cod ?? 0;
+    if (index === 0) return temp.toFixed(1);
+    if (index === 1) return ph.toFixed(2);
+    if (index === 2) return conductivity.toFixed(0);
+    return cod.toFixed(1);
+  }
+
+  build() {
+    Stack({ alignContent: Alignment.TopStart }) {
+      // 渐变背景（底层）
+      Column()
+        .width('100%')
+        .height('100%')
+        .linearGradient({
+          angle: 180,
+          colors: [['#0a1628', 0], ['#0d2847', 0.4], ['#1677FF', 1]]
+        })
+
+      // 内容区域（上层）
+      Scroll() {
+        Column({ space: 16 }) {
+          // 标题区域
+          Row() {
+            Text("水情监测")
+              .fontSize(18)
+              .fontWeight(600)
+              .fontColor('#FFFFFF')
+
+            Blank()
+
+            // 连接状态指示
+            Row({ space: 6 }) {
+              Circle()
+                .width(8)
+                .height(8)
+                .fill(this.hasRealData ? '#52C41A' : '#FAAD14')
+              Text(this.hasRealData ? '实时数据' : '模拟数据')
+                .fontSize(11)
+                .fontColor('rgba(255,255,255,0.7)')
+            }
+          }
+          .width('92%')
+          .padding({ top: 16, bottom: 8 })
+
+          // ===== 基本水质指标 =====
+          Column({ space: 10 }) {
+            Row({ space: 10 }) {
+              this.IndicatorCard(0)
+              this.IndicatorCard(1)
+            }
+            Row({ space: 10 }) {
+              this.IndicatorCard(2)
+              this.IndicatorCard(3)
+            }
+          }
+          .width('92%')
+          .padding({ top: 8, bottom: 8 })
+
+          // ===== 营养盐指标 =====
+          Row({ space: 10 }) {
+            // 氨氮
+            Column({ space: 8 }) {
+              Text("氨氮")
+                .fontSize(13)
+                .fontWeight(500)
+                .fontColor('#333333')
+                .width('100%')
+
+              Row({ space: 4 }) {
+                Text((this.currentData.ammonia ?? 0).toFixed(3))
+                  .fontSize(24)
+                  .fontWeight(600)
+                  .fontColor('#FF4D4F')
+                Text("mg/L")
+                  .fontSize(12)
+                  .fontColor('#999999')
+              }
+
+              Text('正常范围: ≤1.0')
+                .fontSize(10)
+                .fontColor('#999999')
+            }
+            .width('48%')
+            .height(90)
+            .linearGradient({
+              angle: 135,
+              colors: [['#FFFFFF', 0], ['#FFF1F0', 1]]
+            })
+            .borderRadius(12)
+            .padding(12)
+            .justifyContent(FlexAlign.Center)
+            .borderWidth(1)
+            .borderColor('rgba(255,77,79,0.15)')
+
+            // 余氯
+            Column({ space: 8 }) {
+              Text("余氯")
+                .fontSize(13)
+                .fontWeight(500)
+                .fontColor('#333333')
+                .width('100%')
+
+              Row({ space: 4 }) {
+                Text((this.currentData.chlorine ?? 0).toFixed(3))
+                  .fontSize(24)
+                  .fontWeight(600)
+                  .fontColor('#FA8C16')
+                Text("mg/L")
+                  .fontSize(12)
+                  .fontColor('#999999')
+              }
+
+              Text('正常范围: 0.3-0.5')
+                .fontSize(10)
+                .fontColor('#999999')
+            }
+            .width('48%')
+            .height(90)
+            .linearGradient({
+              angle: 135,
+              colors: [['#FFFFFF', 0], ['#FFF7E6', 1]]
+            })
+            .borderRadius(12)
+            .padding(12)
+            .justifyContent(FlexAlign.Center)
+            .borderWidth(1)
+            .borderColor('rgba(250,140,22,0.15)')
+          }
+          .width('92%')
+
+          // ===== 变化曲线 =====
+          Column() {
+            Text("实时变化曲线")
+              .fontSize(13)
+              .fontWeight(500)
+              .fontColor('#333333')
+              .width('100%')
+              .padding({ left: 14, top: 12, bottom: 6 })
+
+            Web({ src: $rawfile('chart/line_chart.html'), controller: this.chartWebviewController })
+              .width('100%')
+              .height(220)
+              .backgroundColor('#FFFFFF')
+              .javaScriptAccess(true)
+              .domStorageAccess(true)
+          }
+          .width('92%')
+          .backgroundColor('#FFFFFF')
+          .borderRadius(12)
+          .borderWidth(1)
+          .borderColor('rgba(22,119,255,0.15)')
+
+          // 底部提示
+          Row() {
+            Text(this.hasRealData ? 'MQTT实时数据' : '模拟数据展示')
+              .fontSize(11)
+              .fontColor('rgba(255,255,255,0.5)')
+          }
+          .width('100%')
+          .justifyContent(FlexAlign.Center)
+          .margin({ top: 8, bottom: 20 })
+        }
+        .width('100%')
+        .justifyContent(FlexAlign.Center)
+      }
+      .width('100%')
+      .height('100%')
+      .scrollBar(BarState.Off)
+      .edgeEffect(EdgeEffect.Spring)
+    }
+    .width('100%')
+    .height('100%')
+  }
+
+  @Builder
+  IndicatorCard(index: number) {
+    Column({ space: 8 }) {
+      // 名称
+      Text(this.basicIndicators[index].name)
+        .fontSize(13)
+        .fontWeight(500)
+        .fontColor('#333333')
+        .width('100%')
+
+      // 数值
+      Row({ space: 2 }) {
+        Text(this.getValueByIndex(index))
+          .fontSize(24)
+          .fontWeight(600)
+          .fontColor(this.basicIndicators[index].color)
+        Text(this.basicIndicators[index].unit)
+          .fontSize(12)
+          .fontColor('#999999')
+      }
+
+      // 正常范围提示
+      Text('正常范围: ' + this.basicIndicators[index].normalRange)
+        .fontSize(10)
+        .fontColor('#999999')
+    }
+    .width('48%')
+    .height(90)
+    .linearGradient({
+      angle: 135,
+      colors: [['#FFFFFF', 0], ['#E6F4FF', 1]]
+    })
+    .borderRadius(12)
+    .padding(12)
+    .justifyContent(FlexAlign.Center)
+    .borderWidth(1)
+    .borderColor('rgba(22,119,255,0.15)')
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/components/user.ets b/entry/src/main/ets/components/user.ets
new file mode 100644
index 0000000..526f1fe
--- /dev/null
+++ b/entry/src/main/ets/components/user.ets
@@ -0,0 +1,314 @@
+import { router } from '@kit.ArkUI';
+import { promptAction } from '@kit.ArkUI';
+
+/**
+ * 用户页面组件 - 科技蓝风格
+ */
+@Component
+export struct User {
+  @State totalNumber: number = 2;
+  @State bugNumber: number = 1;
+  @State userName: string = '管理员';
+
+  // 退出登录
+  handleLogout(): void {
+    promptAction.showDialog({
+      title: '提示',
+      message: '确定要退出登录吗？',
+      buttons: [
+        { text: '取消', color: 'rgba(255,255,255,0.6)' },
+        { text: '确定', color: '#00FF88' }
+      ]
+    }).then((result) => {
+      if (result.index === 1) {
+        // 清除登录信息
+        AppStorage.delete('token');
+        promptAction.showToast({ message: '已退出登录' });
+        // 跳转到登录页
+        router.pushUrl({ url: 'pages/Login' });
+      }
+    });
+  }
+
+  // 报告生成
+  handleGenerateReport(): void {
+    promptAction.showToast({ message: '报告生成功能开发中...' });
+    // TODO: 实现报告生成功能
+  }
+
+  // 设置
+  handleSettings(): void {
+    promptAction.showToast({ message: '设置功能开发中...' });
+    // TODO: 实现设置功能
+  }
+
+  build() {
+    Column() {
+      // 顶部标题栏 - 科技蓝风格
+      Row() {
+        Image($rawfile("user/个人.png"))
+          .width(20)
+          .height(20)
+          .fillColor('#FFFFFF')
+          .margin({ left: 20, right: 10 })
+        Text("个人中心")
+          .fontSize(20)
+          .fontWeight(600)
+          .fontColor("#FFFFFF")
+
+        Blank()
+
+        Text('用户管理')
+          .fontSize(12)
+          .fontColor('rgba(255,255,255,0.5)')
+      }
+      .width("100%")
+      .height(60)
+      .padding({ left: 10, right: 20 })
+      .alignItems(VerticalAlign.Center)
+
+      Scroll() {
+        Column({ space: 16 }) {
+          // 用户信息卡片
+          Column({ space: 12 }) {
+            // 头像区域
+            Row() {
+              Column() {
+                Image($rawfile("user/个人b.png"))
+                  .width(40)
+                  .height(40)
+                  .fillColor('#FFFFFF')
+              }
+              .width(60)
+              .height(60)
+              .borderRadius(30)
+              .backgroundColor('rgba(22,119,255,0.3)')
+              .border({ width: 1, color: 'rgba(22,119,255,0.4)' })
+
+              Column({ space: 4 }) {
+                Text(this.userName)
+                  .fontSize(18)
+                  .fontWeight(FontWeight.Bold)
+                  .fontColor('#FFFFFF')
+
+                Text("鸿蒙水生态系统 · 专业版")
+                  .fontSize(12)
+                  .fontColor("rgba(255, 255, 255, 0.6)")
+              }
+              .alignItems(HorizontalAlign.Start)
+              .margin({ left: 12 })
+            }
+            .width('100%')
+            .justifyContent(FlexAlign.Start)
+            .padding({ left: 16, right: 16, top: 16, bottom: 12 })
+          }
+          .width("92%")
+          .backgroundColor('rgba(22,119,255,0.15)')
+          .borderRadius(12)
+          .border({ width: 1, color: 'rgba(22,119,255,0.3)' })
+
+          // 数据统计卡片
+          Row({ space: 12 }) {
+            // 设备总数
+            Column({ space: 6 }) {
+              Text(this.totalNumber.toString())
+                .fontSize(32)
+                .fontWeight(FontWeight.Bold)
+                .fontColor('#00FF88')
+              Text("设备总数")
+                .fontSize(12)
+                .fontColor("rgba(255,255,255,0.6)")
+            }
+            .width('48%')
+            .height(80)
+            .backgroundColor('rgba(0,255,136,0.1)')
+            .borderRadius(12)
+            .border({ width: 1, color: 'rgba(0,255,136,0.3)' })
+            .justifyContent(FlexAlign.Center)
+
+            // 异常设备
+            Column({ space: 6 }) {
+              Text(this.bugNumber.toString())
+                .fontSize(32)
+                .fontWeight(FontWeight.Bold)
+                .fontColor("#FF6B6B")
+              Text("异常设备")
+                .fontSize(12)
+                .fontColor("rgba(255,255,255,0.6)")
+            }
+            .width('48%')
+            .height(80)
+            .backgroundColor('rgba(255,107,107,0.1)')
+            .borderRadius(12)
+            .border({ width: 1, color: 'rgba(255,107,107,0.3)' })
+            .justifyContent(FlexAlign.Center)
+          }
+          .width('92%')
+
+          // 功能菜单区域
+          Column({ space: 10 }) {
+            // 报告生成
+            Row() {
+              Row({ space: 12 }) {
+                Column() {
+                  Image($rawfile("user/报告.png"))
+                    .width(20)
+                    .height(20)
+                    .fillColor('#00FF88')
+                }
+                .width(40)
+                .height(40)
+                .borderRadius(10)
+                .backgroundColor('rgba(0,255,136,0.15)')
+                .justifyContent(FlexAlign.Center)
+
+                Column({ space: 2 }) {
+                  Text("报告生成")
+                    .fontSize(14)
+                    .fontWeight(FontWeight.Bold)
+                    .fontColor('#FFFFFF')
+                  Text("生成设备运行报告")
+                    .fontSize(11)
+                    .fontColor('rgba(255,255,255,0.5)')
+                }
+                .alignItems(HorizontalAlign.Start)
+              }
+
+              Image($rawfile("user/右箭头.png"))
+                .width(16)
+                .height(16)
+                .fillColor('rgba(255,255,255,0.4)')
+            }
+            .width('100%')
+            .height(60)
+            .backgroundColor('rgba(22,119,255,0.15)')
+            .borderRadius(12)
+            .border({ width: 1, color: 'rgba(22,119,255,0.25)' })
+            .padding({ left: 12, right: 12 })
+            .justifyContent(FlexAlign.SpaceBetween)
+            .alignItems(VerticalAlign.Center)
+            .onClick(() => {
+              this.handleGenerateReport();
+            })
+
+            // 设置
+            Row() {
+              Row({ space: 12 }) {
+                Column() {
+                  Image($rawfile("user/设置.png"))
+                    .width(20)
+                    .height(20)
+                    .fillColor('#4ECDC4')
+                }
+                .width(40)
+                .height(40)
+                .borderRadius(10)
+                .backgroundColor('rgba(78,205,196,0.15)')
+                .justifyContent(FlexAlign.Center)
+
+                Column({ space: 2 }) {
+                  Text("系统设置")
+                    .fontSize(14)
+                    .fontWeight(FontWeight.Bold)
+                    .fontColor('#FFFFFF')
+                  Text("个性化配置与偏好")
+                    .fontSize(11)
+                    .fontColor('rgba(255,255,255,0.5)')
+                }
+                .alignItems(HorizontalAlign.Start)
+              }
+
+              Image($rawfile("user/右箭头.png"))
+                .width(16)
+                .height(16)
+                .fillColor('rgba(255,255,255,0.4)')
+            }
+            .width('100%')
+            .height(60)
+            .backgroundColor('rgba(22,119,255,0.15)')
+            .borderRadius(12)
+            .border({ width: 1, color: 'rgba(22,119,255,0.25)' })
+            .padding({ left: 12, right: 12 })
+            .justifyContent(FlexAlign.SpaceBetween)
+            .alignItems(VerticalAlign.Center)
+            .onClick(() => {
+              this.handleSettings();
+            })
+
+            // 退出登录
+            Row() {
+              Row({ space: 12 }) {
+                Column() {
+                  Image($rawfile("user/退出.png"))
+                    .width(20)
+                    .height(20)
+                    .fillColor('#FF6B6B')
+                }
+                .width(40)
+                .height(40)
+                .borderRadius(10)
+                .backgroundColor('rgba(255,107,107,0.15)')
+                .justifyContent(FlexAlign.Center)
+
+                Column({ space: 2 }) {
+                  Text("退出登录")
+                    .fontSize(14)
+                    .fontWeight(FontWeight.Bold)
+                    .fontColor('#FFFFFF')
+                  Text("切换账号或重新登录")
+                    .fontSize(11)
+                    .fontColor('rgba(255,255,255,0.5)')
+                }
+                .alignItems(HorizontalAlign.Start)
+              }
+
+              Image($rawfile("user/右箭头.png"))
+                .width(16)
+                .height(16)
+                .fillColor('rgba(255,255,255,0.4)')
+            }
+            .width('100%')
+            .height(60)
+            .backgroundColor('rgba(255,107,107,0.1)')
+            .borderRadius(12)
+            .border({ width: 1, color: 'rgba(255,107,107,0.25)' })
+            .padding({ left: 12, right: 12 })
+            .justifyContent(FlexAlign.SpaceBetween)
+            .alignItems(VerticalAlign.Center)
+            .onClick(() => {
+              this.handleLogout();
+            })
+          }
+          .width('92%')
+
+          // 版本信息
+          Column() {
+            Text("版本 v1.0.0")
+              .fontSize(12)
+              .fontColor('rgba(255,255,255,0.4)')
+            Text("© 2024 鸿蒙水生态管理系统")
+              .fontSize(11)
+              .fontColor('rgba(255,255,255,0.3)')
+              .margin({ top: 4 })
+          }
+          .width('100%')
+          .justifyContent(FlexAlign.Center)
+          .margin({ top: 16, bottom: 20 })
+        }
+        .width('100%')
+        .justifyContent(FlexAlign.Center)
+      }
+      .width('100%')
+      .layoutWeight(1)
+      .scrollBar(BarState.Off)
+      .edgeEffect(EdgeEffect.Spring)
+      .padding({ top: 12 })
+    }
+    .width('100%')
+    .height('100%')
+    .linearGradient({
+      angle: 180,
+      colors: [['#0a1628', 0], ['#0d2847', 0.5], ['#1677FF', 1]]
+    })
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/entryability/EntryAbility.ets b/entry/src/main/ets/entryability/EntryAbility.ets
new file mode 100644
index 0000000..ba23472
--- /dev/null
+++ b/entry/src/main/ets/entryability/EntryAbility.ets
@@ -0,0 +1,43 @@
+import { AbilityConstant, UIAbility, Want } from '@kit.AbilityKit';
+import { hilog } from '@kit.PerformanceAnalysisKit';
+import { window } from '@kit.ArkUI';
+
+const DOMAIN = 0x0000;
+
+export default class EntryAbility extends UIAbility {
+  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
+    hilog.info(DOMAIN, 'testTag', '%{public}s', 'Ability onCreate');
+  }
+
+  onDestroy(): void {
+    hilog.info(DOMAIN, 'testTag', '%{public}s', 'Ability onDestroy');
+  }
+
+  onWindowStageCreate(windowStage: window.WindowStage): void {
+    // Main window is created, set main page for this ability
+    hilog.info(DOMAIN, 'testTag', '%{public}s', 'Ability onWindowStageCreate');
+
+    windowStage.loadContent('pages/Login', (err) => {
+      if (err.code) {
+        hilog.error(DOMAIN, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err));
+        return;
+      }
+      hilog.info(DOMAIN, 'testTag', 'Succeeded in loading the content.');
+    });
+  }
+
+  onWindowStageDestroy(): void {
+    // Main window is destroyed, release UI related resources
+    hilog.info(DOMAIN, 'testTag', '%{public}s', 'Ability onWindowStageDestroy');
+  }
+
+  onForeground(): void {
+    // Ability has brought to foreground
+    hilog.info(DOMAIN, 'testTag', '%{public}s', 'Ability onForeground');
+  }
+
+  onBackground(): void {
+    // Ability has back to background
+    hilog.info(DOMAIN, 'testTag', '%{public}s', 'Ability onBackground');
+  }
+}
diff --git a/entry/src/main/ets/model/AiMessageInterface.ets b/entry/src/main/ets/model/AiMessageInterface.ets
new file mode 100644
index 0000000..46f2645
--- /dev/null
+++ b/entry/src/main/ets/model/AiMessageInterface.ets
@@ -0,0 +1,7 @@
+/**
+ * AI请求消息接口
+ */
+export default interface AiMessageInterface {
+  role: string;      // 角色: user 或 assistant
+  content: string;   // 消息内容
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/AlarmItemInterface.ets b/entry/src/main/ets/model/AlarmItemInterface.ets
new file mode 100644
index 0000000..238f571
--- /dev/null
+++ b/entry/src/main/ets/model/AlarmItemInterface.ets
@@ -0,0 +1,12 @@
+export default interface AlarmItemInterface{
+  deviceId:number;
+  id:number;
+  msg:string;
+  value:string;
+  standard:string;
+  coordinate:string;
+  screenPosition:string;
+  createTime:string;
+  name:string;
+  code:string;
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/AlarmStatisticsInterface.ets b/entry/src/main/ets/model/AlarmStatisticsInterface.ets
new file mode 100644
index 0000000..9497574
--- /dev/null
+++ b/entry/src/main/ets/model/AlarmStatisticsInterface.ets
@@ -0,0 +1,11 @@
+export default interface AlarmStatisticsInterface {
+  todayCount: string, //今日异常数量
+  todayTrend: string, //0 下降 1上升 2 等于
+  todayPercentage: string, //比率
+  weekCount: string, //本周异常数量
+  weekTrend: string, //0 下降 1上升 2 等于
+  weekPercentage: string, //比率
+  monthCount: string, //本月异常数量
+  monthTrend: string, //0 下降 1上升 2 等于
+  monthPercentage: string //比率
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/Alarmltemlnterface.ets b/entry/src/main/ets/model/Alarmltemlnterface.ets
new file mode 100644
index 0000000..f124bb6
--- /dev/null
+++ b/entry/src/main/ets/model/Alarmltemlnterface.ets
@@ -0,0 +1,12 @@
+export default interface AlarmItemInterface{
+  deviceId: number;
+  id:number;
+  msg:string;
+  value:string;
+  standard:string;
+  coordinate:string;
+  screenPosition:string;
+  createTime:string;
+  name:string;
+  code:string;
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/CarbonInfoInterface.ets b/entry/src/main/ets/model/CarbonInfoInterface.ets
new file mode 100644
index 0000000..e431c63
--- /dev/null
+++ b/entry/src/main/ets/model/CarbonInfoInterface.ets
@@ -0,0 +1,5 @@
+export default interface CarbonInfoInterface {
+  carbonSequestration: number
+  ph: number
+  waterTemperature: number
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/DeviceListInterface.ets b/entry/src/main/ets/model/DeviceListInterface.ets
new file mode 100644
index 0000000..850b3b3
--- /dev/null
+++ b/entry/src/main/ets/model/DeviceListInterface.ets
@@ -0,0 +1,8 @@
+export default interface DeviceListInterface{
+  id:number;
+  latitudeLongitude:string;
+  name:string;
+  screenPosition:string;
+  status:number
+  code:string;
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/DifyRequestBody.ets b/entry/src/main/ets/model/DifyRequestBody.ets
new file mode 100644
index 0000000..8f2ed15
--- /dev/null
+++ b/entry/src/main/ets/model/DifyRequestBody.ets
@@ -0,0 +1,10 @@
+/**
+ * Dify API请求体接口
+ */
+export default interface DifyRequestBody {
+  inputs: Record<string, string>;
+  query: string;
+  response_mode: string;
+  conversation_id: string;
+  user: string;
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/EutrophicationItemInterface.ets b/entry/src/main/ets/model/EutrophicationItemInterface.ets
new file mode 100644
index 0000000..cbb93e7
--- /dev/null
+++ b/entry/src/main/ets/model/EutrophicationItemInterface.ets
@@ -0,0 +1,14 @@
+export default interface EutrophicationItemInterface{
+  //水温
+  waterTemperature:number
+  //cod
+  cod:number
+  //ph
+  ph:number
+  //余氯
+  residualChlorine:number
+  //氨氮
+  ammoniaNitrogen:number
+  //时间
+  createTime:string
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/LoginInterface.ets b/entry/src/main/ets/model/LoginInterface.ets
new file mode 100644
index 0000000..a24cf1a
--- /dev/null
+++ b/entry/src/main/ets/model/LoginInterface.ets
@@ -0,0 +1,4 @@
+export default interface LoginInterface{
+  username:string
+  password:string
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/OpenAiRequestBody.ets b/entry/src/main/ets/model/OpenAiRequestBody.ets
new file mode 100644
index 0000000..331fd89
--- /dev/null
+++ b/entry/src/main/ets/model/OpenAiRequestBody.ets
@@ -0,0 +1,12 @@
+import AiMessageInterface from './AiMessageInterface';
+
+/**
+ * OpenAI API请求体接口
+ */
+export default interface OpenAiRequestBody {
+  model: string;
+  messages: AiMessageInterface[];
+  stream: boolean;
+  temperature?: number;
+  max_tokens?: number;
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/RequestModel.ets b/entry/src/main/ets/model/RequestModel.ets
new file mode 100644
index 0000000..dee680b
--- /dev/null
+++ b/entry/src/main/ets/model/RequestModel.ets
@@ -0,0 +1,32 @@
+/**
+ * AI API响应模型 - 支持Dify和OpenAI两种格式
+ */
+export default interface RequestModel {
+  // Dify格式字段
+  answer?: string;           // Dify: AI回答内容
+  event?: string;            // Dify: 事件类型: message, message_end等
+  conversation_id?: string;  // Dify: 会话ID
+  message_id?: string;       // Dify: 消息ID
+  task_id?: string;          // Dify: 任务ID
+
+  // OpenAI格式字段
+  choices?: ChoiceItem[];    // OpenAI: 选择列表
+}
+
+/**
+ * OpenAI Choice项
+ */
+export interface ChoiceItem {
+  delta?: DeltaItem;
+  finish_reason?: string;
+  index?: number;
+}
+
+/**
+ * OpenAI Delta项
+ */
+export interface DeltaItem {
+  content?: string;
+  role?: string;
+}
+
diff --git a/entry/src/main/ets/model/SeaRangeInterface.ets b/entry/src/main/ets/model/SeaRangeInterface.ets
new file mode 100644
index 0000000..21ff55f
--- /dev/null
+++ b/entry/src/main/ets/model/SeaRangeInterface.ets
@@ -0,0 +1,22 @@
+export default interface SeaRangeInterface {
+  //水温
+  waterTemperatureBottom: number;
+  waterTemperatureTop: number;
+  //cod
+  codBottom: number;
+  codTop: number;
+  //ph
+  phBottom: number;
+  phTop: number;
+  //余氯
+  residualChlorineBottom:number;
+  residualChlorineTop:number;
+  //电导率
+  conductivityBottom:number
+  conductivityTop:number
+  //氨氮
+  ammoniaNitrogenBottom:number
+  ammoniaNitrogenTop:number
+  //id
+  id?:number
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/StatisticalInterface.ets b/entry/src/main/ets/model/StatisticalInterface.ets
new file mode 100644
index 0000000..bf1aa7e
--- /dev/null
+++ b/entry/src/main/ets/model/StatisticalInterface.ets
@@ -0,0 +1,5 @@
+export default interface StatisticalInterface {
+  date: string
+  type: string
+  value: number
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/UserInfoInterface.ets b/entry/src/main/ets/model/UserInfoInterface.ets
new file mode 100644
index 0000000..214ef7e
--- /dev/null
+++ b/entry/src/main/ets/model/UserInfoInterface.ets
@@ -0,0 +1,11 @@
+export default interface UserInfoInterface {
+  phonenumber: string | undefined, //用户姓名
+  avatar?: string | undefined, //用户头像
+  nickName: string
+  status?: string
+  userName?: string;
+  password?: string;
+  remark?: string | null;
+  userId?: string | undefined
+  editFlag?: boolean | undefined
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/model/WaterTemperatureStore.ets b/entry/src/main/ets/model/WaterTemperatureStore.ets
new file mode 100644
index 0000000..3895796
--- /dev/null
+++ b/entry/src/main/ets/model/WaterTemperatureStore.ets
@@ -0,0 +1,14 @@
+export default interface SeaStatusInterface{
+  temp: number;
+  temp_compare:number;
+  cod:number;
+  cod_compare:number;
+  ph:number;
+  ph_compare:number;
+  residualChlorine:number;
+  residualChlorine_compare:number;
+  conductivity:number;
+  conductivity_compare:number;
+  ammoniaNitrogen:number;
+  ammoniaNitrogen_compare:number;
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/pages/Details.ets b/entry/src/main/ets/pages/Details.ets
new file mode 100644
index 0000000..b93eb53
--- /dev/null
+++ b/entry/src/main/ets/pages/Details.ets
@@ -0,0 +1,78 @@
+import { WaterMonitor } from '../components/WaterMonitor';
+import { DeviceAlarm } from '../components/DeviceAlarm';
+import { AiPredict } from '../components/AiPredict';
+import { ContrastAnalysis } from '../components/ContrastAnalysis';
+import { CarbonCalc } from '../components/CarbonCalc';
+import DeviceListInterface from '../model/DeviceListInterface';
+
+@Entry
+@Component
+struct Details {
+  @State currentIndex: number = 0;
+  @State currentDevice: DeviceListInterface | null = null;
+
+  private navItems: string[] = ['水情检测', '设备报警', 'AI预测', '对比分析', '碳汇计算'];
+
+  aboutToAppear(): void {
+    const device = AppStorage.get<DeviceListInterface>('point');
+    if (device) {
+      this.currentDevice = device;
+    }
+  }
+
+  build() {
+    Column() {
+      // 内容区域
+      Column() {
+        if (this.currentIndex === 0) {
+          WaterMonitor()
+        } else if (this.currentIndex === 1) {
+          DeviceAlarm()
+        } else if (this.currentIndex === 2) {
+          AiPredict()
+        } else if (this.currentIndex === 3) {
+          ContrastAnalysis()
+        } else {
+          CarbonCalc()
+        }
+      }
+      .width('100%')
+      .layoutWeight(1)
+
+      // 底部导航 - 科技蓝风格
+      Row() {
+        ForEach(this.navItems, (item: string, index: number) => {
+          Column({ space: 4 }) {
+            Image($rawfile(this.currentIndex === index
+              ? `daohang/ic_tab_0${index + 1}_active.png`
+              : `daohang/ic_tab_0${index + 1}.png`))
+              .width(24)
+              .height(24)
+
+            Text(item)
+              .fontSize(11)
+              .fontColor(this.currentIndex === index ? '#FFFFFF' : 'rgba(255,255,255,0.5)')
+              .fontWeight(this.currentIndex === index ? FontWeight.Bold : FontWeight.Normal)
+          }
+          .width('20%')
+          .justifyContent(FlexAlign.Center)
+          .onClick(() => {
+            this.currentIndex = index;
+          })
+        })
+      }
+      .width('100%')
+      .height(65)
+      .backgroundColor('rgba(13,40,71,0.95)')
+      .borderWidth({ top: 1 })
+      .borderColor('rgba(22,119,255,0.3)')
+      .justifyContent(FlexAlign.SpaceEvenly)
+    }
+    .width('100%')
+    .height('100%')
+    .linearGradient({
+      angle: 180,
+      colors: [['#0a1628', 0], ['#0d2847', 0.5], ['#1677FF', 1]]
+    })
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/pages/Index.ets b/entry/src/main/ets/pages/Index.ets
new file mode 100644
index 0000000..6092b2f
--- /dev/null
+++ b/entry/src/main/ets/pages/Index.ets
@@ -0,0 +1,76 @@
+import { Equipment } from '../components/Equipment';
+import { Add } from '../components/Add';
+import { User } from '../components/user';
+
+// 导航项接口
+interface NavItem {
+  title: string;
+  trueIcon: string;
+  falseIcon: string;
+}
+
+@Entry
+@Component
+struct HomePage {
+  // 当前选中的导航索引，0:设备, 1:添加, 2:我的
+  @State currentIndex: number = 0;
+
+  // 导航项配置
+  private navItems: NavItem[] = [
+    { title: '设备', trueIcon: 'index_true/设备.png', falseIcon: 'index_false/设备.png' },
+    { title: '添加', trueIcon: 'index_true/添加.png', falseIcon: 'index_false/添加.png' },
+    { title: '我的', trueIcon: 'index_true/我的.png', falseIcon: 'index_false/我的.png' }
+  ];
+
+  build() {
+    Column() {
+      // 上方内容区域 - 显示对应页面
+      Column() {
+        if (this.currentIndex === 0) {
+          Equipment()
+        } else if (this.currentIndex === 1) {
+          Add()
+        } else {
+          User()
+        }
+      }
+      .width('100%')
+      .layoutWeight(1)
+
+      // 底部导航栏 - 科技蓝风格
+      Row() {
+        ForEach(this.navItems, (item: NavItem, index: number) => {
+          Column({ space: 5 }) {
+            Image($rawfile(this.currentIndex === index ? item.trueIcon : item.falseIcon))
+              .width(24)
+              .height(24)
+              .fillColor(this.currentIndex === index ? '#00FF88' : 'rgba(255,255,255,0.5)')
+
+            Text(item.title)
+              .fontSize(12)
+              .fontColor(this.currentIndex === index ? '#00FF88' : 'rgba(255,255,255,0.6)')
+              .fontWeight(this.currentIndex === index ? FontWeight.Bold : FontWeight.Normal)
+          }
+          .width('33.33%')
+          .justifyContent(FlexAlign.Center)
+          .onClick(() => {
+            this.currentIndex = index;
+          })
+        })
+      }
+      .width('100%')
+      .height(60)
+      .backgroundColor('rgba(13,40,71,0.95)')
+      .borderWidth({ top: 1 })
+      .borderColor('rgba(22,119,255,0.3)')
+      .justifyContent(FlexAlign.SpaceEvenly)
+
+    }
+    .width('100%')
+    .height('100%')
+    .linearGradient({
+      angle: 180,
+      colors: [['#0a1628', 0], ['#0d2847', 0.5], ['#1677FF', 1]]
+    })
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/pages/Login.ets b/entry/src/main/ets/pages/Login.ets
new file mode 100644
index 0000000..3db1edb
--- /dev/null
+++ b/entry/src/main/ets/pages/Login.ets
@@ -0,0 +1,356 @@
+import LoginInterface from "../model/LoginInterface";
+import UserInfoInterface from "../model/UserInfoInterface";
+import { login, register } from "../utils/ApiService";
+import { promptAction, router, Router } from '@kit.ArkUI';
+
+
+
+@Entry
+@Component
+struct Login {
+  @State messageOne: string = '鸿蒙+AI水生态全流程管理系统';
+  @State messageTwo: string = 'HarmonyOS·AI·智慧水生态';
+  @State glowOpacity: number = 0.4;
+  @State waveScale: number = 1;
+  @State isLogin: boolean = true; // true: 登录, false: 注册
+  @State userName: string = '';
+  @State password: string = '';
+  @State name: string = '';
+  @State isAgree: boolean = false;
+  @State isLoading: boolean = false; // 加载状态
+  @State errorMsg: string = ''; // 错误信息
+
+  aboutToAppear() {
+    // 光晕呼吸动画
+    setInterval(() => {
+      this.glowOpacity = 0.3 + Math.sin(Date.now() / 1500) * 0.15;
+    }, 50);
+
+    // 波纹缩放动画
+    setInterval(() => {
+      this.waveScale = 1 + Math.sin(Date.now() / 2000) * 0.05;
+    }, 50);
+  }
+
+  // 测试账号配置
+  private testAccount: string = 'test';
+  private testPassword: string = '123456';
+
+  // 登录方法
+  async handleLogin(): Promise<void> {
+    if (!this.userName || !this.password) {
+      promptAction.showToast({ message: '请输入账户和密码' });
+      return;
+    }
+
+    // 测试账号直接登录（无需网络请求）
+    if (this.userName === this.testAccount && this.password === this.testPassword) {
+      promptAction.showToast({ message: '测试账号登录成功' });
+      AppStorage.setOrCreate('token', 'test_token_12345');
+      router.pushUrl({ url: 'pages/Index' });
+      return;
+    }
+
+    this.isLoading = true;
+    const loginData: LoginInterface = {
+      username: this.userName,
+      password: this.password
+    };
+
+    try {
+      const response = await login(loginData);
+      if (response.code === 200) {
+        promptAction.showToast({ message: '登录成功' });
+        // 保存token到AppStorage
+        AppStorage.setOrCreate('token', response.data);
+        // 登录成功后跳转到主页
+        router.pushUrl({ url: 'pages/Index' });
+      } else {
+        promptAction.showToast({ message: response.message || '登录失败' });
+      }
+    } catch (error) {
+      promptAction.showToast({ message: '网络请求失败，请检查网络连接' });
+      console.error('登录错误: ' + JSON.stringify(error));
+    } finally {
+      this.isLoading = false;
+    }
+  }
+
+  // 注册方法
+  async handleRegister(): Promise<void> {
+    if (!this.userName || !this.password || !this.name) {
+      promptAction.showToast({ message: '请填写完整信息' });
+      return;
+    }
+
+    this.isLoading = true;
+    const registerData: UserInfoInterface = {
+      phonenumber: this.userName,
+      password: this.password,
+      nickName: this.name
+    };
+
+    try {
+      const response = await register(registerData);
+
+      if (response.code === 200) {
+        promptAction.showToast({ message: '注册成功，请登录' });
+        this.isLogin = true; // 切换到登录
+        this.name = ''; // 清空姓名
+      } else {
+        promptAction.showToast({ message: response.message || '注册失败' });
+      }
+    } catch (error) {
+      promptAction.showToast({ message: '网络请求失败，请检查网络连接' });
+      console.error('注册错误: ' + JSON.stringify(error));
+    } finally {
+      this.isLoading = false;
+    }
+  }
+
+  build() {
+    Stack({ alignContent: Alignment.Center }) {
+      // 主渐变背景 - 铺满全屏
+      Column()
+        .width('100%')
+        .height('100%')
+        .linearGradient({
+          angle: 180,
+          colors: [
+            ['#001E38', 0],
+            ['#0958D9', 0.5],
+            ['#1677FF', 0.8],
+            ['#4096ff', 1]
+          ]
+        })
+
+      // 柔和光晕 - 左上
+      Column()
+        .width(350)
+        .height(350)
+        .borderRadius(175)
+        .linearGradient({
+          angle: 135,
+          colors: [
+            ['rgba(64, 150, 255, ' + this.glowOpacity + ')', 0],
+            ['rgba(64, 150, 255, 0)', 0.7]
+          ]
+        })
+        .position({ x: -100, y: -50 })
+        .blur(100)
+
+      // 柔和光晕 - 右下
+      Column()
+        .width(300)
+        .height(300)
+        .borderRadius(150)
+        .linearGradient({
+          angle: 315,
+          colors: [
+            ['rgba(22, 119, 255, ' + (this.glowOpacity * 0.8) + ')', 0],
+            ['rgba(22, 119, 255, 0)', 0.6]
+          ]
+        })
+        .position({ x: '70%', y: '60%' })
+        .blur(80)
+
+      // 淡淡的波纹圆环
+      ForEach([1, 2], (item: number) => {
+        Column()
+          .width(220 + item * 60)
+          .height(220 + item * 60)
+          .borderRadius(110 + item * 30)
+          .borderWidth(1)
+          .borderColor('rgba(255, 255, 255, ' + (0.1 - item * 0.03) + ')')
+          .backgroundColor('transparent')
+          .scale({ x: this.waveScale, y: this.waveScale })
+      })
+
+      // 主内容 - 使用Column布局，标题在上，登录卡片在下
+      Column() {
+        // 标题区域 - 放在上方
+        Column({ space: 8 }) {
+          Text(this.messageOne)
+            .fontSize(25)
+            .fontWeight(500)
+            .fontWeight(FontWeight.Bold)
+            .fontColor(Color.White)
+            .textAlign(TextAlign.Center)
+            .textShadow({
+              radius: 20,
+              color: 'rgba(64, 150, 255, 0.5)',
+              offsetX: 0,
+              offsetY: 0
+            })
+
+          Text(this.messageTwo)
+            .fontSize(13)
+            .fontColor('rgba(255, 255, 255, 0.75)')
+        }
+        .width('100%')
+        .padding({ top: 80, bottom: 30 })
+
+        // 登录/注册卡片
+        Column({ space: 15 }) {
+          // 登录/注册切换
+          Row({ space: 50 }) {
+            Text("登录")
+              .fontSize(18)
+              .fontColor(this.isLogin ? '#FFFFFF' : 'rgba(255, 255, 255, 0.5)')
+              .fontWeight(this.isLogin ? FontWeight.Bold : FontWeight.Normal)
+              .onClick(() => {
+                this.isLogin = true;
+              })
+              .fontWeight(800)
+
+            Text("注册")
+              .fontSize(18)
+              .fontColor(!this.isLogin ? '#FFFFFF' : 'rgba(255, 255, 255, 0.5)')
+              .fontWeight(!this.isLogin ? FontWeight.Bold : FontWeight.Normal)
+              .onClick(() => {
+                this.isLogin = false;
+              })
+              .fontWeight(800)
+          }
+          .margin({ top: 5, bottom: 10 })
+
+          // 输入框区域
+          Column({ space: 15 }) {
+            // 账户输入框
+            Row(){
+              Image($rawfile('Login/用户.png'))
+                .width(15)
+                .height(15)
+                .margin({left:20})
+              TextInput({ placeholder: '请输入账户', text: this.userName })
+                .placeholderColor("#FFFFFF")
+                .placeholderFont({ size:12 })
+                .onChange((value: string) => {
+                  this.userName = value;
+                })
+                .width('85%')
+                .height(45)
+                .borderRadius(8)
+                .fontColor('#FFFFFF')
+                .padding({ left: 15, right: 15 })
+                .backgroundColor(Color.Transparent)
+            }
+            .backgroundColor('rgba(255, 255, 255, 0.12)')
+            .width(300)
+            .borderRadius(10)
+
+            // 密码输入框
+            Row(){
+              Image($rawfile('Login/锁.png'))
+                .width(15)
+                .height(15)
+                .margin({left:20})
+              TextInput({ placeholder: '请输入密码',  text: this.password })
+                .placeholderColor("#FFFFFF")
+                .placeholderFont({ size:12 })
+                .onChange((value: string) => {
+                  this.password = value;
+                })
+                .width('85%')
+                .height(45)
+                .borderRadius(8)
+                .fontColor('#FFFFFF')
+                .type(InputType.Password)
+                .padding({ left: 15, right: 15 })
+                .backgroundColor(Color.Transparent)
+            }
+            .backgroundColor('rgba(255, 255, 255, 0.12)')
+            .width(300)
+            .borderRadius(10)
+
+            // 注册时显示姓名输入框
+            if (!this.isLogin) {
+              Row(){
+                Image($rawfile('Login/电话.png'))
+                  .width(15)
+                  .height(15)
+                  .margin({left:20})
+                TextInput({ placeholder: '请输入电话', text: this.name })
+                  .placeholderColor("#FFFFFF")
+                  .placeholderFont({ size:12 })
+                  .onChange((value: string) => {
+                    this.name = value;
+                  })
+                  .width('100%')
+                  .height(45)
+                  .borderRadius(8)
+                  .fontColor('#FFFFFF')
+                  .padding({ left: 15, right: 15 })
+                  .backgroundColor(Color.Transparent)
+              }
+              .backgroundColor('rgba(255, 255, 255, 0.12)')
+              .width(300)
+              .borderRadius(10)
+            }
+          }
+          .width('100%')
+
+          // 协议同意
+          Row({ space: 8 }) {
+            Checkbox()
+              .select(this.isAgree)
+              .selectedColor('#4096ff')
+              .onChange((isChecked: boolean) => {
+                this.isAgree = isChecked;
+              })
+              .width(15)
+              .height(15)
+            Text() {
+              Span('我已阅读并同意')
+                .fontColor('rgba(255, 255, 255, 0.7)')
+                .fontSize(12)
+              Span('《用户协议》')
+                .fontColor('#FFFFFF')
+                .fontSize(12)
+              Span('和')
+                .fontColor('rgba(255, 255, 255, 0.7)')
+                .fontSize(12)
+              Span('《隐私政策》')
+                .fontColor('#FFFFFF')
+                .fontSize(12)
+            }
+          }
+          .width('100%')
+          .justifyContent(FlexAlign.Center)
+          .margin({ top: 10 , left:-30})
+
+          // 登录/注册按钮
+          Button(this.isLoading ? '处理中...' : (this.isLogin ? '登录' : '注册'))
+            .width('90%')
+            .height(45)
+            .fontSize(16)
+            .fontColor('#1677FF')
+            .fontWeight(FontWeight.Bold)
+            .backgroundColor('#FFFFFF')
+            .borderRadius(15)
+            .enabled(this.isAgree && !this.isLoading)
+            .margin({ top: 15 })
+            .onClick(() => {
+              if (this.isLogin) {
+                this.handleLogin();
+              } else {
+                this.handleRegister();
+              }
+            })
+        }
+        .width('100%')
+        .padding(25)
+        .borderRadius(16)
+        .margin({top:80})
+
+      }
+      .width('100%')
+      .height('100%')
+      .justifyContent(FlexAlign.Start)
+
+    }
+    .width('100%')
+    .height('100%')
+    .expandSafeArea([SafeAreaType.SYSTEM], [SafeAreaEdge.TOP, SafeAreaEdge.BOTTOM])
+  }
+}
diff --git a/entry/src/main/ets/utils/ApiService.ets b/entry/src/main/ets/utils/ApiService.ets
new file mode 100644
index 0000000..d498d87
--- /dev/null
+++ b/entry/src/main/ets/utils/ApiService.ets
@@ -0,0 +1,77 @@
+import { iResponseModel, RequestUtil } from "./RequestUtil";
+
+import LoginInterface from "../model/LoginInterface";
+import UserInfoInterface from "../model/UserInfoInterface";
+import DeviceListInterface from "../model/DeviceListInterface";
+import CarbonInfoInterface from "../model/CarbonInfoInterface";
+import StatisticalInterface from "../model/StatisticalInterface";
+import SeaRangeInterface from "../model/SeaRangeInterface";
+import EutrophicationItemInterface from "../model/EutrophicationItemInterface";
+import AlarmItemInterface from "../model/AlarmItemInterface";
+import AlarmStatisticsInterface from "../model/AlarmStatisticsInterface";
+
+//登录
+export function login(cls: LoginInterface): Promise<iResponseModel<string>> {
+  return RequestUtil.post("/app/common/login", cls, false);
+}
+
+//注册
+export function register(cls: UserInfoInterface): Promise<iResponseModel<string>> {
+  return RequestUtil.post("/app/common/register", cls, false);
+}
+
+//查询长江设备列表-获取四个监测点的设备
+export function getDeviceList(): Promise<iResponseModel<DeviceListInterface[]>> {
+  return RequestUtil.get("/sea/device/list");
+}
+
+//数据监测-查询长江最近7日数据->折线图(Ai的预测服务也是这个接口)
+export function getSeaEutrophication(): Promise<iResponseModel<EutrophicationItemInterface[]>> {
+  return RequestUtil.get("/sea/day/getLimit7?code=" + AppStorage.get<DeviceListInterface>("point")?.code);
+}
+
+//AI预测-ai问答
+export const chatUrl: string = "/v1/chat-messages";
+
+//对比分析->  通过参数类型查询长江按月统计
+export function getContrast(paramType: number): Promise<iResponseModel<StatisticalInterface[]>> {
+  return RequestUtil.get("/sea/month/monthDetail?paramType=" + paramType + "&deviceCode=" +
+    AppStorage.get<DeviceListInterface>("point")?.code);
+}
+
+//最新异常列表
+export function getAlarmList(): Promise<iResponseModel<AlarmItemInterface[]>> {
+  return RequestUtil.get("/sea/alarm/list?code=" + AppStorage.get<DeviceListInterface>("point")?.code);
+}
+
+//最新异常列表
+export function getAlarmStatistics(): Promise<iResponseModel<AlarmStatisticsInterface>> {
+  return RequestUtil.get("/sea/alarm/getAlarmStatistics?code=" + AppStorage.get<DeviceListInterface>("point")?.code);
+}
+
+//异常趋势
+export function getAlarmTrend(): Promise<iResponseModel<StatisticalInterface[]>> {
+  return RequestUtil.get("/sea/alarm/getAlarmTrend?code=" + AppStorage.get<DeviceListInterface>("point")?.code);
+}
+
+//获取长江数据区间范围值详细信息
+export function getSeaRange(): Promise<iResponseModel<SeaRangeInterface>> {
+  return RequestUtil.get("/sea/range/1");
+}
+
+//修改长江数据区间范围值详细信息
+export function editSeaRange(cls: SeaRangeInterface): Promise<iResponseModel<SeaRangeInterface>> {
+  cls.id = 1;
+  return RequestUtil.put("/sea/range", cls);
+}
+
+//碳汇详情
+export function getCarbonInfo(): Promise<iResponseModel<CarbonInfoInterface>> {
+  let date = new Date().getFullYear() + "年" + new Date().getMonth().toString().padStart(2, "0");
+  return RequestUtil.get(`/sea/month/query?deviceCode=${AppStorage.get<DeviceListInterface>("point")?.code}&remark=${encodeURIComponent(date)}`);
+}
+
+//固碳6个月
+export function getCarbonList(): Promise<iResponseModel<StatisticalInterface[]>> {
+  return RequestUtil.get(`/sea/month/sixMonthStatistics?deviceCode=${AppStorage.get<DeviceListInterface>("point")?.code}`);
+}
\ No newline at end of file
diff --git a/entry/src/main/ets/utils/ApiService.ts.ets b/entry/src/main/ets/utils/ApiService.ts.ets
new file mode 100644
index 0000000..1a848c9
--- /dev/null
+++ b/entry/src/main/ets/utils/ApiService.ts.ets
@@ -0,0 +1,87 @@
+import { iResponseModel, RequestUtil } from "./RequestUtil";
+
+import LoginInterface from "../model/LoginInterface";
+import UserInfoInterface from "../model/UserInfoInterface";
+import DeviceListInterface from "../model/DeviceListInterface";
+import CarbonInfoInterface from "../model/CarbonInfoInterface";
+import StatisticalInterface from "../model/StatisticalInterface";
+import SeaRangeInterface from "../model/SeaRangeInterface";
+import EutrophicationItemInterface from "../model/EutrophicationItemInterface";
+import AlarmItemInterface from "../model/Alarmltemlnterface";
+import AlarmStatisticsInterface from "../model/AlarmStatisticsInterface";
+
+// 登录
+export function login(cls: LoginInterface): Promise<iResponseModel<string>> {
+  return RequestUtil.post("/app/common/login", cls, false);
+}
+
+// 注册
+export function register(cls: UserInfoInterface | LoginInterface): Promise<iResponseModel<string>> {
+  return RequestUtil.post("/app/common/register", cls, false);
+}
+
+// 查询长江设备列表-获取四个监测点的设备
+export function getDeviceList(): Promise<iResponseModel<DeviceListInterface[]>> {
+  return RequestUtil.get("/sea/device/list");
+}
+
+// 数据监测-查询长江最近7日数据
+export function getSeaEutrophication(): Promise<iResponseModel<EutrophicationItemInterface[]>> {
+  const code = AppStorage.get<DeviceListInterface>("point")?.code ?? "";
+  return RequestUtil.get("/sea/day/getLimit7?code=" + code);
+}
+
+// AI预测-ai问答
+export const chatUrl: string = "/v1/chat-messages";
+
+// 对比分析 -> 通过参数类型查询长江按月统计
+export function getContrast(paramType: number): Promise<iResponseModel<StatisticalInterface[]>> {
+  const code = AppStorage.get<DeviceListInterface>("point")?.code ?? "";
+  if (!code) {
+    // 这里直接抛错，避免发 deviceCode=undefined 的脏请求
+    return Promise.reject(new Error("deviceCode为空：请先在AppStorage写入point.code"));
+  }
+  return RequestUtil.get(`/sea/month/monthDetail?paramType=${paramType}&deviceCode=${code}`);
+}
+
+// 最新异常列表
+export function getAlarmList(): Promise<iResponseModel<AlarmItemInterface[]>> {
+  return RequestUtil.get("/sea/alarm/list?code=" + (AppStorage.get<DeviceListInterface>("point")?.code ?? ""));
+}
+
+// 最新异常统计
+export function getAlarmStatistics(): Promise<iResponseModel<AlarmStatisticsInterface>> {
+  return RequestUtil.get("/sea/alarm/getAlarmStatistics?code=" + (AppStorage.get<DeviceListInterface>("point")?.code
+    ?? ""));
+}
+
+// 异常趋势
+export function getAlarmTrend(): Promise<iResponseModel<StatisticalInterface[]>> {
+  return RequestUtil.get("/sea/alarm/getAlarmTrend?code=" + (AppStorage.get<DeviceListInterface>("point")?.code ??
+    ""));
+}
+
+// 获取长江数据区间范围值详细信息
+export function getSeaRange(): Promise<iResponseModel<SeaRangeInterface>> {
+  return RequestUtil.get("/sea/range/1");
+}
+
+// 修改长江数据区间范围值详细信息
+export function editSeaRange(cls: SeaRangeInterface): Promise<iResponseModel<SeaRangeInterface>> {
+  cls.id = 1;
+  return RequestUtil.put("/sea/range", cls);
+}
+
+// 碳汇详情
+export function getCarbonInfo(): Promise<iResponseModel<CarbonInfoInterface>> {
+  const date = new Date().getFullYear() + "年" + new Date().getMonth().toString().padStart(2, "0");
+  const code = AppStorage.get<DeviceListInterface>("point")?.code ?? "";
+  return RequestUtil.get(`/sea/month/query?deviceCode=${code}&remark=${encodeURIComponent(date)}`);
+}
+
+// 固碳6个月
+export function getCarbonList(): Promise<iResponseModel<StatisticalInterface[]>> {
+  const code = AppStorage.get<DeviceListInterface>("point")?.code ?? "";
+  return RequestUtil.get(`/sea/month/sixMonthStatistics?deviceCode=${code}`);
+}
+
diff --git a/entry/src/main/ets/utils/Config.ets b/entry/src/main/ets/utils/Config.ets
new file mode 100644
index 0000000..21b1c24
--- /dev/null
+++ b/entry/src/main/ets/utils/Config.ets
@@ -0,0 +1,23 @@
+/**
+ * 配置文件 - 存放服务器IP、端口等变量参数
+ */
+export class Config {
+  // 后端服务器IP地址
+  static readonly BASE_URL: string = 'http://192.168.31.100:8080';
+
+  // ==================== AI服务配置 ====================
+  // 主API（Dify格式）
+  static readonly AI_PRIMARY_URL: string = 'http://192.168.31.26';
+  static readonly AI_PRIMARY_PATH: string = '/v1';
+  static readonly AI_PRIMARY_KEY: string = "app-druPEUrX7Qw7kWBv1JUfaG4q"
+  // 备用API（OpenAI格式）- 当主API失败时自动切换
+  static readonly AI_BACKUP_URL: string = 'https://ark.cn-beijing.volces.com';
+  static readonly AI_BACKUP_PATH: string = '/api/v3/chat/completions';
+  static readonly AI_BACKUP_KEY: string = 'ark-7bdaff26-adab-4332-a1f5-f97fb03e7d56-aa3a1';  // 填写你的OpenAI密钥
+  static readonly AI_BACKUP_MODEL: string = 'doubao-seed-2-0-code-preview-260215';      // 使用的模型
+
+  // 请求超时时间（毫秒）
+  static readonly TIMEOUT: number = 30000;
+}
+
+export default Config;
\ No newline at end of file
diff --git a/entry/src/main/ets/utils/MqttService.ets b/entry/src/main/ets/utils/MqttService.ets
new file mode 100644
index 0000000..8bfa04c
--- /dev/null
+++ b/entry/src/main/ets/utils/MqttService.ets
@@ -0,0 +1,309 @@
+/**
+ * MQTT服务 - ArkTS版本
+ * 使用 @ohos/mqtt 原生库实现MQTT连接
+ */
+import {
+  MqttAsync,
+  MqttClient,
+  MqttMessage,
+  MqttQos,
+  MqttResponse,
+  MqttSubscribeOptions
+} from '@ohos/mqtt';
+import emitter from '@ohos.events.emitter';
+
+// MQTT 事件ID (字符串形式)
+const MQTT_EVENT_ID: string = 'mqtt_water_quality';
+
+// 事件数据接口
+interface PayloadData {
+  payload: string
+}
+
+// 简化的Emitter工具类（替代@pura/harmony-utils的EmitterUtil）
+export class SimpleEmitterUtil {
+  private static storedCallback: ((payload: string) => void) | undefined = undefined;
+  private static emitterCallback: ((eventData: emitter.EventData) => void) | undefined = undefined;
+
+  // 发送事件
+  static emit(data: string): void {
+    const payloadData: PayloadData = { payload: data };
+    const eventData: emitter.EventData = { data: payloadData };
+    emitter.emit(MQTT_EVENT_ID, eventData);
+  }
+
+  // 订阅事件
+  static on(callback: (payload: string) => void): void {
+    SimpleEmitterUtil.storedCallback = callback;
+    // 创建符合 emitter.EventData 签名的回调
+    const emitterCallback = (eventData: emitter.EventData): void => {
+      if (eventData && eventData.data) {
+        const payloadData = eventData.data as PayloadData;
+        if (payloadData.payload) {
+          callback(payloadData.payload);
+        }
+      }
+    };
+    SimpleEmitterUtil.emitterCallback = emitterCallback;
+    emitter.on(MQTT_EVENT_ID, emitterCallback);
+  }
+
+  // 取消订阅
+  static off(): void {
+    if (SimpleEmitterUtil.emitterCallback) {
+      emitter.off(MQTT_EVENT_ID, SimpleEmitterUtil.emitterCallback);
+      SimpleEmitterUtil.storedCallback = undefined;
+      SimpleEmitterUtil.emitterCallback = undefined;
+    }
+  }
+}
+
+// MQTT 事件ID导出（兼容旧代码使用数字）
+export const MQTT_EVENT_ID_NUM: number = 1001;
+
+// 水质数据接口
+export interface WaterQualityData {
+  temperature: number;
+  ph: number;
+  conductivity: number;
+  cod: number;
+  ammonia: number;
+  chlorine: number;
+  timestamp: number;
+}
+
+// MQTT配置接口
+interface MqttConfig {
+  url: string;
+  clientId: string;
+  userName: string;
+  password: string;
+  topic: string;
+  qos: MqttQos;
+}
+
+export class MqttService {
+  private static instance: MqttService;
+  private mqttClient: MqttClient | null = null;
+  private config: MqttConfig;
+  private isConnectedFlag: boolean = false;
+
+  constructor() {
+    this.config = {
+      url: 'tcp://192.168.31.100:1883',
+      clientId: 'sea-lwq',
+      userName: 'admin',
+      password: 'admin',
+      topic: 'sea_status',
+      qos: 0
+    };
+  }
+
+  public static getInstance(): MqttService {
+    if (!MqttService.instance) {
+      MqttService.instance = new MqttService();
+    }
+    return MqttService.instance;
+  }
+
+  // 设置配置
+  setConfig(url: string, topic: string): void {
+    this.config.url = url;
+    this.config.topic = topic;
+    console.info('MQTT配置: url=' + url + ', topic=' + topic +
+      ', clientId=' + this.config.clientId +
+      ', userName=' + this.config.userName);
+  }
+
+  // 初始化连接
+  async connect(): Promise<void> {
+    try {
+      const status = await this.getMqttConnectStatus();
+      if (status) {
+        console.info('MQTT已经连接，跳过重复连接');
+        return;
+      }
+
+      this.createMqttClient();
+      await this.connectMqtt();
+      await this.subscribe();
+      this.Arrived();
+
+      console.info('MQTT初始化完成');
+    } catch (err) {
+      console.error('MQTT初始化失败: ' + JSON.stringify(err));
+    }
+  }
+
+  // 获取连接状态
+  private async getMqttConnectStatus(): Promise<boolean> {
+    if (this.mqttClient) {
+      const result = await this.mqttClient.isConnected();
+      return result === true;
+    }
+    return false;
+  }
+
+  // 创建mqtt实例
+  createMqttClient(): void {
+    this.mqttClient = MqttAsync.createMqtt({
+      url: this.config.url,
+      clientId: this.config.clientId,
+      persistenceType: 1
+    });
+    console.info('MQTT客户端实例已创建: url=' + this.config.url + ', clientId=' + this.config.clientId);
+  }
+
+  // 连接服务器
+  async connectMqtt(): Promise<void> {
+    if (!this.mqttClient) {
+      console.error('MQTT客户端未创建');
+      return;
+    }
+
+    console.info('正在连接MQTT服务器: userName=' + this.config.userName);
+
+    await this.mqttClient.connect({
+      userName: this.config.userName,
+      password: this.config.password,
+      connectTimeout: 30,
+      automaticReconnect: true,
+      MQTTVersion: 3
+    }).then((res: MqttResponse) => {
+      this.isConnectedFlag = true;
+      console.info('MQTT服务器连接成功：' + JSON.stringify(res.message));
+    }).catch((err: Error) => {
+      this.isConnectedFlag = false;
+      console.error('MQTT服务器连接失败：' + JSON.stringify(err));
+    });
+  }
+
+  // 订阅主题
+  async subscribe(): Promise<void> {
+    if (!this.mqttClient) {
+      return;
+    }
+
+    const subscribeOption: MqttSubscribeOptions = {
+      topic: this.config.topic,
+      qos: this.config.qos
+    };
+
+    console.info('正在订阅主题: ' + this.config.topic);
+
+    await this.mqttClient.subscribe(subscribeOption).then((res: MqttResponse) => {
+      console.info('MQTT订阅主题成功：' + JSON.stringify(res.message));
+    }).catch((err: Error) => {
+      console.error('MQTT订阅主题失败：' + JSON.stringify(err));
+    });
+  }
+
+  // 监听消息到达 - 使用EmitterUtil发送到事件总线
+  Arrived(): void {
+    if (!this.mqttClient) {
+      return;
+    }
+
+    console.info('开始监听MQTT消息...');
+
+    this.mqttClient.messageArrived((err: Error, data: MqttMessage) => {
+      if (err) {
+        console.error('MQTT消息接收错误: ' + JSON.stringify(err));
+      } else {
+        const payloadStr: string = data.payload as string;
+        console.info('收到MQTT消息: ' + payloadStr);
+        // 通过SimpleEmitterUtil发送到事件总线
+        SimpleEmitterUtil.emit(payloadStr);
+      }
+    });
+  }
+
+  // 发布消息
+  async publish(message: string, topic?: string): Promise<void> {
+    if (!this.mqttClient) {
+      console.error('MQTT未连接，无法发送消息');
+      return;
+    }
+
+    await this.mqttClient.publish({
+      topic: topic || this.config.topic,
+      qos: this.config.qos,
+      payload: message
+    }).then((data: MqttResponse) => {
+      console.info('MQTT消息发送成功：' + JSON.stringify(data));
+    }).catch((err: Error) => {
+      console.error('MQTT消息发送失败：' + JSON.stringify(err));
+    });
+  }
+
+  // 断开连接
+  async disconnect(): Promise<void> {
+    if (this.mqttClient) {
+      try {
+        await this.mqttClient.destroy();
+        console.info('MQTT连接已断开');
+      } catch (err) {
+        console.error('MQTT断开失败: ' + JSON.stringify(err));
+      }
+      this.mqttClient = null;
+    }
+    this.isConnectedFlag = false;
+  }
+
+  // 销毁客户端
+  async destroy(): Promise<void> {
+    if (!this.mqttClient) {
+      return;
+    }
+    await this.mqttClient.destroy().then((data: boolean) => {
+      if (data) {
+        console.info('MQTT实例销毁成功');
+        SimpleEmitterUtil.off();
+      } else {
+        console.error('MQTT实例销毁失败');
+      }
+    });
+    this.mqttClient = null;
+    this.isConnectedFlag = false;
+  }
+
+  // 解析水质数据
+  // 后端: {"temp":21,"cod":44,"ph":0,"residualChlorine":0,"conductivity":0,"ammoniaNitrogen":0,...}
+  parseWaterQualityData(rawMessage: string): WaterQualityData {
+    try {
+      const raw = JSON.parse(rawMessage) as Record<string, number>;
+      const data: WaterQualityData = {
+        temperature: raw['temp'] ?? 0,
+        ph: raw['ph'] ?? 0,
+        conductivity: raw['conductivity'] ?? 0,
+        cod: raw['cod'] ?? 0,
+        ammonia: raw['ammoniaNitrogen'] ?? 0,
+        chlorine: raw['residualChlorine'] ?? 0,
+        timestamp: Date.now()
+      };
+      console.info('解析后水质数据: 温度=' + data.temperature +
+        ', pH=' + data.ph +
+        ', 电导率=' + data.conductivity +
+        ', COD=' + data.cod +
+        ', 氨氮=' + data.ammonia +
+        ', 余氯=' + data.chlorine);
+      return data;
+    } catch (err) {
+      console.error('水质数据解析失败: ' + rawMessage);
+      return {
+        temperature: 0, ph: 0, conductivity: 0,
+        cod: 0, ammonia: 0, chlorine: 0, timestamp: Date.now()
+      };
+    }
+  }
+
+  getConnectionStatus(): boolean {
+    return this.isConnectedFlag;
+  }
+
+  getConfig(): MqttConfig {
+    return this.config;
+  }
+}
+
+export default MqttService;
diff --git a/entry/src/main/ets/utils/RequestUtil.ets b/entry/src/main/ets/utils/RequestUtil.ets
new file mode 100644
index 0000000..9706dbe
--- /dev/null
+++ b/entry/src/main/ets/utils/RequestUtil.ets
@@ -0,0 +1,185 @@
+/**
+ * HTTP请求工具类
+ * 使用 @kit.NetworkKit 进行网络请求
+ */
+import { http } from '@kit.NetworkKit';
+import { BusinessError } from '@kit.BasicServicesKit';
+import Config from './Config';
+
+// 响应数据接口
+export interface iResponseModel<T> {
+  code: number;
+  message: string;
+  data: T;
+}
+
+// HTTP请求头接口
+interface HttpHeader {
+  'Content-Type': string;
+  'Accept': string;
+  'Authorization'?: string;
+}
+
+// HTTP请求选项接口
+interface HttpOptions {
+  method: http.RequestMethod;
+  header: HttpHeader;
+  extraData?: Object;
+  connectTimeout: number;
+  readTimeout: number;
+}
+
+export class RequestUtil {
+  /**
+   * GET请求
+   */
+  static get<T>(url: string): Promise<iResponseModel<T>> {
+    return new Promise((resolve, reject) => {
+      let httpRequest = http.createHttp();
+
+      const header: HttpHeader = {
+        'Content-Type': 'application/json',
+        'Accept': 'application/json'
+      };
+
+      const options: HttpOptions = {
+        method: http.RequestMethod.GET,
+        header: header,
+        connectTimeout: Config.TIMEOUT,
+        readTimeout: Config.TIMEOUT
+      };
+
+      httpRequest.request(
+        Config.BASE_URL + url,
+        options,
+        (err: BusinessError, data: http.HttpResponse) => {
+          if (!err) {
+            try {
+              let result: iResponseModel<T> = JSON.parse(data.result as string);
+              resolve(result);
+            } catch (e) {
+              reject(new Error('JSON解析失败'));
+            }
+          } else {
+            reject(new Error(err.message));
+          }
+          httpRequest.destroy();
+        }
+      );
+    });
+  }
+
+  /**
+   * GET请求（带query参数）
+   * @param url 请求地址，例如 /monthDetail
+   * @param params 查询参数，例如 { paramType: 'WATER_TEMPERATURE', deviceCode: 'D001' }
+   */
+  static getWithParams<T>(url: string, params: Record<string, string | number | boolean>): Promise<iResponseModel<T>>
+  {
+    const query = Object.keys(params)
+      .map((key: string) => `${encodeURIComponent(key)}=${encodeURIComponent(String(params[key]))}`)
+      .join('&');
+
+    const fullUrl = query.length > 0 ? `${url}?${query}` : url;
+    return RequestUtil.get<T>(fullUrl);
+  }
+
+  /**
+   * POST请求
+   * @param url 请求地址
+   * @param cls 请求体对象
+   * @param needToken 是否需要Token
+   */
+  static post<T>(url: string, cls: Object, needToken: boolean): Promise<iResponseModel<T>> {
+    return new Promise((resolve, reject) => {
+      let httpRequest = http.createHttp();
+
+      let header: HttpHeader;
+      if (needToken) {
+        const token = AppStorage.get<string>('token');
+        header = {
+          'Content-Type': 'application/json',
+          'Accept': 'application/json',
+          'Authorization': 'Bearer ' + token
+        };
+      } else {
+        header = {
+          'Content-Type': 'application/json',
+          'Accept': 'application/json'
+        };
+      }
+
+      const options: HttpOptions = {
+        method: http.RequestMethod.POST,
+        header: header,
+        extraData: cls,
+        connectTimeout: Config.TIMEOUT,
+        readTimeout: Config.TIMEOUT
+      };
+
+      httpRequest.request(
+        Config.BASE_URL + url,
+        options,
+        (err: BusinessError, data: http.HttpResponse) => {
+          if (!err) {
+            try {
+              let result: iResponseModel<T> = JSON.parse(data.result as string);
+              resolve(result);
+            } catch (e) {
+              reject(new Error('JSON解析失败'));
+            }
+          } else {
+            reject(new Error(err.message));
+          }
+          httpRequest.destroy();
+        }
+      );
+    });
+  }
+
+  /**
+   * PUT请求
+   * @param url 请求地址
+   * @param cls 请求体对象
+   */
+  static put<T>(url: string, cls: Object): Promise<iResponseModel<T>> {
+    return new Promise((resolve, reject) => {
+      let httpRequest = http.createHttp();
+
+      const token = AppStorage.get<string>('token');
+      const header: HttpHeader = {
+        'Content-Type': 'application/json',
+        'Accept': 'application/json',
+        'Authorization': 'Bearer ' + token
+      };
+
+      const options: HttpOptions = {
+        method: http.RequestMethod.PUT,
+        header: header,
+        extraData: cls,
+        connectTimeout: Config.TIMEOUT,
+        readTimeout: Config.TIMEOUT
+      };
+
+      httpRequest.request(
+        Config.BASE_URL + url,
+        options,
+        (err: BusinessError, data: http.HttpResponse) => {
+          if (!err) {
+            try {
+              let result: iResponseModel<T> = JSON.parse(data.result as string);
+              resolve(result);
+            } catch (e) {
+              reject(new Error('JSON解析失败'));
+            }
+          } else {
+            reject(new Error(err.message));
+          }
+          httpRequest.destroy();
+        }
+      );
+    });
+  }
+}
+
+export default RequestUtil;
diff --git a/entry/src/main/module.json5 b/entry/src/main/module.json5
new file mode 100644
index 0000000..2298e5a
--- /dev/null
+++ b/entry/src/main/module.json5
@@ -0,0 +1,46 @@
+{
+  "module": {
+    "name": "entry",
+    "type": "entry",
+    "description": "$string:module_desc",
+    "mainElement": "EntryAbility",
+    "deviceTypes": [
+      "phone"
+    ],
+    "deliveryWithInstall": true,
+    "installationFree": false,
+    "pages": "$profile:main_pages",
+    "abilities": [
+      {
+        "name": "EntryAbility",
+        "srcEntry": "./ets/entryability/EntryAbility.ets",
+        "description": "$string:EntryAbility_desc",
+        "icon": "$media:layered_image",
+        "label": "$string:EntryAbility_label",
+        "startWindowIcon": "$media:startIcon",
+        "startWindowBackground": "$color:start_window_background",
+        "exported": true,
+        "skills": [
+          {
+            "entities": [
+              "entity.system.home"
+            ],
+            "actions": [
+              "ohos.want.action.home"
+            ]
+          }
+        ]
+      }
+    ],
+    "requestPermissions": [
+      {
+        "name": "ohos.permission.INTERNET",
+        "reason": "$string:permission_internet_reason",
+        "usedScene": {
+          "abilities": ["EntryAbility"],
+          "when": "inuse"
+        }
+      }
+    ]
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/resources/base/element/color.json b/entry/src/main/resources/base/element/color.json
new file mode 100644
index 0000000..3c71296
--- /dev/null
+++ b/entry/src/main/resources/base/element/color.json
@@ -0,0 +1,8 @@
+{
+  "color": [
+    {
+      "name": "start_window_background",
+      "value": "#FFFFFF"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/entry/src/main/resources/base/element/float.json b/entry/src/main/resources/base/element/float.json
new file mode 100644
index 0000000..33ea223
--- /dev/null
+++ b/entry/src/main/resources/base/element/float.json
@@ -0,0 +1,8 @@
+{
+  "float": [
+    {
+      "name": "page_text_font_size",
+      "value": "50fp"
+    }
+  ]
+}
diff --git a/entry/src/main/resources/base/element/string.json b/entry/src/main/resources/base/element/string.json
new file mode 100644
index 0000000..1b1b6e0
--- /dev/null
+++ b/entry/src/main/resources/base/element/string.json
@@ -0,0 +1,20 @@
+{
+  "string": [
+    {
+      "name": "module_desc",
+      "value": "module description"
+    },
+    {
+      "name": "EntryAbility_desc",
+      "value": "description"
+    },
+    {
+      "name": "EntryAbility_label",
+      "value": "label"
+    },
+    {
+      "name": "permission_internet_reason",
+      "value": "用于连接MQTT服务器获取实时水质数据"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/entry/src/main/resources/base/media/background.png b/entry/src/main/resources/base/media/background.png
new file mode 100644
index 0000000..923f2b3
Binary files /dev/null and b/entry/src/main/resources/base/media/background.png differ
diff --git a/entry/src/main/resources/base/media/foreground.png b/entry/src/main/resources/base/media/foreground.png
new file mode 100644
index 0000000..97014d3
Binary files /dev/null and b/entry/src/main/resources/base/media/foreground.png differ
diff --git a/entry/src/main/resources/base/media/layered_image.json b/entry/src/main/resources/base/media/layered_image.json
new file mode 100644
index 0000000..fb49920
--- /dev/null
+++ b/entry/src/main/resources/base/media/layered_image.json
@@ -0,0 +1,7 @@
+{
+  "layered-image":
+  {
+    "background" : "$media:background",
+    "foreground" : "$media:foreground"
+  }
+}
\ No newline at end of file
diff --git a/entry/src/main/resources/base/media/startIcon.png b/entry/src/main/resources/base/media/startIcon.png
new file mode 100644
index 0000000..205ad8b
Binary files /dev/null and b/entry/src/main/resources/base/media/startIcon.png differ
diff --git a/entry/src/main/resources/base/profile/main_pages.json b/entry/src/main/resources/base/profile/main_pages.json
new file mode 100644
index 0000000..edd7c6f
--- /dev/null
+++ b/entry/src/main/resources/base/profile/main_pages.json
@@ -0,0 +1,7 @@
+{
+  "src": [
+    "pages/Index",
+    "pages/Login",
+    "pages/Details"
+  ]
+}
diff --git a/entry/src/main/resources/rawfile/Equipment/右括号.png b/entry/src/main/resources/rawfile/Equipment/右括号.png
new file mode 100644
index 0000000..c65d093
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diff --git a/entry/src/main/resources/rawfile/Equipment/设备管理.png b/entry/src/main/resources/rawfile/Equipment/设备管理.png
new file mode 100644
index 0000000..de58bfd
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diff --git a/entry/src/main/resources/rawfile/Login/用户.png b/entry/src/main/resources/rawfile/Login/用户.png
new file mode 100644
index 0000000..c15635c
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diff --git a/entry/src/main/resources/rawfile/Login/电话.png b/entry/src/main/resources/rawfile/Login/电话.png
new file mode 100644
index 0000000..8c28565
Binary files /dev/null and b/entry/src/main/resources/rawfile/Login/电话.png differ
diff --git a/entry/src/main/resources/rawfile/Login/锁.png b/entry/src/main/resources/rawfile/Login/锁.png
new file mode 100644
index 0000000..70134b8
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diff --git a/entry/src/main/resources/rawfile/add/条形码.png b/entry/src/main/resources/rawfile/add/条形码.png
new file mode 100644
index 0000000..dd543a9
Binary files /dev/null and b/entry/src/main/resources/rawfile/add/条形码.png differ
diff --git a/entry/src/main/resources/rawfile/add/添加 加号.png b/entry/src/main/resources/rawfile/add/添加 加号.png
new file mode 100644
index 0000000..85354b2
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diff --git a/entry/src/main/resources/rawfile/add/编写.png b/entry/src/main/resources/rawfile/add/编写.png
new file mode 100644
index 0000000..4c1224a
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diff --git a/entry/src/main/resources/rawfile/ces/all_point.png b/entry/src/main/resources/rawfile/ces/all_point.png
new file mode 100644
index 0000000..b4a54f7
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diff --git a/entry/src/main/resources/rawfile/chart/carbon_chart.html b/entry/src/main/resources/rawfile/chart/carbon_chart.html
new file mode 100644
index 0000000..8fd2248
--- /dev/null
+++ b/entry/src/main/resources/rawfile/chart/carbon_chart.html
@@ -0,0 +1,71 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>碳汇趋势图</title>
+    <script src="https://cdn.jsdelivr.net/npm/echarts@5.4.3/dist/echarts.min.js"></script>
+    <style>
+        * { margin: 0; padding: 0; box-sizing: border-box; }
+        body { background: transparent; }
+        #chart { width: 100%; height: 160px; }
+    </style>
+</head>
+<body>
+    <div id="chart"></div>
+    <script>
+        var chart = echarts.init(document.getElementById('chart'));
+        var months = ['1月', '2月', '3月', '4月', '5月', '6月'];
+        var data = [0];
+
+        var option = {
+            tooltip: {
+                trigger: 'axis',
+                backgroundColor: 'rgba(13,40,71,0.9)',
+                borderColor: '#00FF88',
+                borderWidth: 1,
+                textStyle: { color: '#FFFFFF', fontSize: 12 },
+                formatter: function(p) {
+                    return '<div style="font-weight:bold">' + p[0].axisValue + '</div><div style="color:#00FF88">' + p[0].value.toFixed(2) + ' kg</div>';
+                }
+            },
+            grid: { left: 35, right: 15, top: 15, bottom: 25 },
+            xAxis: {
+                type: 'category',
+                data: months,
+                axisLabel: { fontSize: 11, color: 'rgba(255,255,255,0.7)' },
+                axisLine: { lineStyle: { color: 'rgba(22,119,255,0.4)' } },
+                axisTick: { show: false }
+            },
+            yAxis: {
+                type: 'value',
+                axisLabel: { fontSize: 11, color: 'rgba(255,255,255,0.7)', formatter: '{value}' },
+                axisLine: { show: false },
+                axisTick: { show: false },
+                splitLine: { lineStyle: { color: 'rgba(22,119,255,0.2)', type: 'dashed' } }
+            },
+            series: [{
+                type: 'line',
+                smooth: true,
+                symbol: 'circle',
+                symbolSize: 5,
+                lineStyle: { color: '#00FF88', width: 2 },
+                itemStyle: { color: '#00FF88' },
+                areaStyle: {
+                    color: {
+                        type: 'linear', x: 0, y: 0, x2: 0, y2: 1,
+                        colorStops: [{ offset: 0, color: 'rgba(0,255,136,0.35)' }, { offset: 1, color: 'rgba(0,255,136,0.05)' }]
+                    }
+                },
+                data: data
+            }]
+        };
+        chart.setOption(option);
+
+        function updateData(arr) {
+            data = arr;
+            option.series[0].data = data;
+            chart.setOption(option);
+        }
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/entry/src/main/resources/rawfile/chart/contrast_chart.html b/entry/src/main/resources/rawfile/chart/contrast_chart.html
new file mode 100644
index 0000000..da1bd66
--- /dev/null
+++ b/entry/src/main/resources/rawfile/chart/contrast_chart.html
@@ -0,0 +1,181 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>contrast chart</title>
+    <style>
+        html, body {
+          width: 100%;
+          height: 100%;
+          margin: 0;
+          padding: 0;
+          background: transparent;
+          overflow: hidden;
+        }
+        #chart {
+          width: 100%;
+          height: 100%;
+          background: transparent;
+        }
+    </style>
+</head>
+<body>
+<div id="chart"></div>
+
+<!-- 你项目里若是本地 echarts，请改成你的实际路径 -->
+<!-- 例如：<script src="./echarts.min.js"></script> -->
+<script src="https://cdn.jsdelivr.net/npm/echarts@5/dist/echarts.min.js"></script>
+
+<script>
+    let chart = null;
+    let currentColor = '#00FF88';
+    let currentData = [];
+    let currentUnit = '';
+    let currentName = '';
+    let xLabels = ['1月','2月','3月','4月','5月','6月','7月','8月','9月','10月','11月','12月'];
+
+    function getOption(data, unit, name, color) {
+      const max = Math.max.apply(null, data);
+      const min = Math.min.apply(null, data);
+
+      return {
+        backgroundColor: 'transparent',
+        animation: true,
+        grid: {
+          left: 18,
+          right: 12,
+          top: 24,
+          bottom: 24,
+          containLabel: true
+        },
+        tooltip: {
+          trigger: 'axis',
+          backgroundColor: 'rgba(10,22,40,0.9)',
+          borderColor: 'rgba(22,119,255,0.5)',
+          borderWidth: 1,
+          textStyle: { color: '#fff', fontSize: 11 },
+          formatter: function (params) {
+            const p = params[0];
+            return `${p.axisValue}<br/>${name}: ${p.value}${unit ? ' ' + unit : ''}`;
+          }
+        },
+        xAxis: {
+          type: 'category',
+          data: xLabels,
+          boundaryGap: false,
+          axisLine: { lineStyle: { color: 'rgba(255,255,255,0.25)' } },
+          axisTick: { show: false },
+          axisLabel: {
+            color: 'rgba(255,255,255,0.65)',
+            fontSize: 10
+          },
+          splitLine: { show: false }
+        },
+        yAxis: {
+          type: 'value',
+          scale: true,
+          axisLine: { show: false },
+          axisTick: { show: false },
+          axisLabel: {
+            color: 'rgba(255,255,255,0.65)',
+            fontSize: 10
+          },
+          splitLine: {
+            lineStyle: { color: 'rgba(255,255,255,0.12)' }
+          }
+        },
+        series: [
+          {
+            name: name,
+            type: 'line',
+            data: data,
+            smooth: true,
+            symbol: 'circle',
+            symbolSize: 6,
+            showSymbol: true,
+            lineStyle: {
+              width: 2,
+              color: color
+            },
+            itemStyle: {
+              color: color,
+              borderColor: '#ffffff',
+              borderWidth: 1
+            },
+            areaStyle: {
+              color: {
+                type: 'linear',
+                x: 0, y: 0, x2: 0, y2: 1,
+                colorStops: [
+                  { offset: 0, color: hexToRgba(color, 0.35) },
+                  { offset: 1, color: hexToRgba(color, 0.02) }
+                ]
+              }
+            },
+            markPoint: {
+              symbolSize: 30,
+              label: { color: '#fff', fontSize: 9 },
+              itemStyle: { color: color },
+              data: [
+                { type: 'max', name: '最大值' },
+                { type: 'min', name: '最小值' }
+              ]
+            }
+          }
+        ]
+      };
+    }
+
+    function hexToRgba(hex, alpha) {
+      const c = hex.replace('#', '');
+      if (c.length !== 6) return `rgba(0,255,136,${alpha})`;
+      const r = parseInt(c.substring(0, 2), 16);
+      const g = parseInt(c.substring(2, 4), 16);
+      const b = parseInt(c.substring(4, 6), 16);
+      return `rgba(${r},${g},${b},${alpha})`;
+    }
+
+    function ensureChart() {
+      const dom = document.getElementById('chart');
+      if (!chart) {
+        chart = echarts.init(dom, null, { renderer: 'canvas' });
+      }
+    }
+
+    // 首次初始化（对应 TS: onPageEnd -> initChart）
+    function initChart(data, unit, name) {
+      ensureChart();
+      currentData = Array.isArray(data) ? data : [];
+      currentUnit = unit || '';
+      currentName = name || '';
+      chart.setOption(getOption(currentData, currentUnit, currentName, currentColor), true);
+    }
+
+    // 更新数据（对应 TS: updateChart -> updateData）
+    function updateData(data, unit, name) {
+      ensureChart();
+      currentData = Array.isArray(data) ? data : currentData;
+      currentUnit = unit !== undefined ? unit : currentUnit;
+      currentName = name !== undefined ? name : currentName;
+      chart.setOption(getOption(currentData, currentUnit, currentName, currentColor), true);
+    }
+
+    // 更新颜色
+    function setColor(color) {
+      currentColor = color || currentColor;
+      if (!chart) return;
+      chart.setOption(getOption(currentData, currentUnit, currentName, currentColor), true);
+    }
+
+    window.addEventListener('resize', function () {
+      if (chart) chart.resize();
+    });
+
+    // 暴露给 ArkTS 调用
+    window.initChart = initChart;
+    window.updateData = updateData;
+    window.setColor = setColor;
+</script>
+</body>
+</html>
\ No newline at end of file
diff --git a/entry/src/main/resources/rawfile/chart/line_chart.html b/entry/src/main/resources/rawfile/chart/line_chart.html
new file mode 100644
index 0000000..ef97ba5
--- /dev/null
+++ b/entry/src/main/resources/rawfile/chart/line_chart.html
@@ -0,0 +1,234 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>水质实时曲线</title>
+    <script src="https://cdn.jsdelivr.net/npm/echarts@5.4.3/dist/echarts.min.js"></script>
+    <style>
+        * {
+            margin: 0;
+            padding: 0;
+            box-sizing: border-box;
+        }
+        body {
+            background-color: transparent;
+            font-family: 'Microsoft YaHei', sans-serif;
+            padding: 8px;
+        }
+        #chart {
+            width: 100%;
+            height: 200px;
+        }
+    </style>
+</head>
+<body>
+    <div id="chart"></div>
+    <script>
+        var chartDom = document.getElementById('chart');
+        var myChart = echarts.init(chartDom);
+
+        // 初始化数据存储
+        var chlorineData = [];
+        var ammoniaData = [];
+        var timeData = [];
+
+        // 初始化20个空数据点
+        for(var i = 19; i >= 0; i--) {
+            timeData.push(formatTime(new Date(Date.now() - i * 5000)));
+            chlorineData.push(0);
+            ammoniaData.push(0);
+        }
+
+        // 时间格式化函数
+        function formatTime(date) {
+            var h = date.getHours();
+            var m = date.getMinutes();
+            var s = date.getSeconds();
+            return (h < 10 ? '0' + h : h) + ':' + (m < 10 ? '0' + m : m) + ':' + (s < 10 ? '0' + s : s);
+        }
+
+        // ECharts配置
+        var option = {
+            tooltip: {
+                trigger: 'axis',
+                backgroundColor: 'rgba(255,255,255,0.95)',
+                borderColor: '#E5E5E5',
+                borderWidth: 1,
+                textStyle: {
+                    color: '#333',
+                    fontSize: 13
+                },
+                formatter: function(params) {
+                    var result = '<div style="font-weight:bold;margin-bottom:4px">' + params[0].axisValue + '</div>';
+                    params.forEach(function(item) {
+                        var color = item.seriesName === '余氯' ? '#FA8C16' : '#FF4D4F';
+                        result += '<div style="display:flex;align-items:center;margin:2px 0">';
+                        result += '<span style="display:inline-block;width:10px;height:10px;background:' + color + ';border-radius:50%;margin-right:6px"></span>';
+                        result += '<span style="flex:1">' + item.seriesName + '</span>';
+                        result += '<span style="font-weight:bold;color:' + color + '">' + item.value.toFixed(3) + ' mg/L</span>';
+                        result += '</div>';
+                    });
+                    return result;
+                }
+            },
+            legend: {
+                data: ['余氯', '氨氮'],
+                top: 5,
+                right: 10,
+                textStyle: {
+                    fontSize: 12,
+                    color: '#666'
+                },
+                itemWidth: 16,
+                itemHeight: 8,
+                itemGap: 15
+            },
+            grid: {
+                left: 45,
+                right: 15,
+                top: 30,
+                bottom: 30
+            },
+            xAxis: {
+                type: 'category',
+                boundaryGap: false,
+                data: timeData,
+                axisLabel: {
+                    fontSize: 10,
+                    color: '#999',
+                    interval: 3,
+                    rotate: 0
+                },
+                axisLine: {
+                    lineStyle: { color: '#E5E5E5', width: 1 }
+                },
+                axisTick: { show: false }
+            },
+            yAxis: {
+                type: 'value',
+                min: 0,
+                max: 1,
+                interval: 0.2,
+                axisLabel: {
+                    fontSize: 10,
+                    color: '#999',
+                    formatter: '{value}'
+                },
+                axisLine: { show: false },
+                axisTick: { show: false },
+                splitLine: {
+                    lineStyle: {
+                        color: '#F0F0F0',
+                        type: 'dashed'
+                    }
+                }
+            },
+            series: [
+                {
+                    name: '余氯',
+                    type: 'line',
+                    smooth: true,
+                    symbol: 'circle',
+                    symbolSize: 4,
+                    showSymbol: false,
+                    lineStyle: {
+                        color: '#FA8C16',
+                        width: 2.5
+                    },
+                    itemStyle: { color: '#FA8C16' },
+                    areaStyle: {
+                        color: {
+                            type: 'linear',
+                            x: 0, y: 0, x2: 0, y2: 1,
+                            colorStops: [
+                                { offset: 0, color: 'rgba(250,140,22,0.3)' },
+                                { offset: 0.5, color: 'rgba(250,140,22,0.15)' },
+                                { offset: 1, color: 'rgba(250,140,22,0.05)' }
+                            ]
+                        }
+                    },
+                    data: chlorineData
+                },
+                {
+                    name: '氨氮',
+                    type: 'line',
+                    smooth: true,
+                    symbol: 'circle',
+                    symbolSize: 4,
+                    showSymbol: false,
+                    lineStyle: {
+                        color: '#FF4D4F',
+                        width: 2.5
+                    },
+                    itemStyle: { color: '#FF4D4F' },
+                    areaStyle: {
+                        color: {
+                            type: 'linear',
+                            x: 0, y: 0, x2: 0, y2: 1,
+                            colorStops: [
+                                { offset: 0, color: 'rgba(255,77,79,0.3)' },
+                                { offset: 0.5, color: 'rgba(255,77,79,0.15)' },
+                                { offset: 1, color: 'rgba(255,77,79,0.05)' }
+                            ]
+                        }
+                    },
+                    data: ammoniaData
+                }
+            ]
+        };
+
+        myChart.setOption(option);
+
+        // 更新数据函数 - 从HarmonyOS调用
+        function updateData(chlorine, ammonia) {
+            var now = formatTime(new Date());
+
+            // 添加新数据
+            timeData.push(now);
+            chlorineData.push(parseFloat(chlorine));
+            ammoniaData.push(parseFloat(ammonia));
+
+            // 保持最多20个数据点
+            if(timeData.length > 20) {
+                timeData.shift();
+                chlorineData.shift();
+                ammoniaData.shift();
+            }
+
+            // 更新图表
+            myChart.setOption({
+                xAxis: { data: timeData },
+                series: [
+                    { data: chlorineData },
+                    { data: ammoniaData }
+                ]
+            });
+        }
+
+        // 清空数据函数
+        function clearData() {
+            timeData = [];
+            chlorineData = [];
+            ammoniaData = [];
+            for(var i = 19; i >= 0; i--) {
+                timeData.push(formatTime(new Date(Date.now() - i * 5000)));
+                chlorineData.push(0);
+                ammoniaData.push(0);
+            }
+            myChart.setOption({
+                xAxis: { data: timeData },
+                series: [
+                    { data: chlorineData },
+                    { data: ammoniaData }
+                ]
+            });
+        }
+
+        // 响应窗口大小变化
+        window.addEventListener('resize', function() {
+            myChart.resize();
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file
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diff --git a/entry/src/mock/mock-config.json5 b/entry/src/mock/mock-config.json5
new file mode 100644
index 0000000..7a73a41
--- /dev/null
+++ b/entry/src/mock/mock-config.json5
@@ -0,0 +1,2 @@
+{
+}
\ No newline at end of file
diff --git a/entry/src/ohosTest/ets/test/Ability.test.ets b/entry/src/ohosTest/ets/test/Ability.test.ets
new file mode 100644
index 0000000..85c78f6
--- /dev/null
+++ b/entry/src/ohosTest/ets/test/Ability.test.ets
@@ -0,0 +1,35 @@
+import { hilog } from '@kit.PerformanceAnalysisKit';
+import { describe, beforeAll, beforeEach, afterEach, afterAll, it, expect } from '@ohos/hypium';
+
+export default function abilityTest() {
+  describe('ActsAbilityTest', () => {
+    // Defines a test suite. Two parameters are supported: test suite name and test suite function.
+    beforeAll(() => {
+      // Presets an action, which is performed only once before all test cases of the test suite start.
+      // This API supports only one parameter: preset action function.
+    })
+    beforeEach(() => {
+      // Presets an action, which is performed before each unit test case starts.
+      // The number of execution times is the same as the number of test cases defined by **it**.
+      // This API supports only one parameter: preset action function.
+    })
+    afterEach(() => {
+      // Presets a clear action, which is performed after each unit test case ends.
+      // The number of execution times is the same as the number of test cases defined by **it**.
+      // This API supports only one parameter: clear action function.
+    })
+    afterAll(() => {
+      // Presets a clear action, which is performed after all test cases of the test suite end.
+      // This API supports only one parameter: clear action function.
+    })
+    it('assertContain', 0, () => {
+      // Defines a test case. This API supports three parameters: test case name, filter parameter, and test case function.
+      hilog.info(0x0000, 'testTag', '%{public}s', 'it begin');
+      let a = 'abc';
+      let b = 'b';
+      // Defines a variety of assertion methods, which are used to declare expected boolean conditions.
+      expect(a).assertContain(b);
+      expect(a).assertEqual(a);
+    })
+  })
+}
\ No newline at end of file
diff --git a/entry/src/ohosTest/ets/test/List.test.ets b/entry/src/ohosTest/ets/test/List.test.ets
new file mode 100644
index 0000000..794c7dc
--- /dev/null
+++ b/entry/src/ohosTest/ets/test/List.test.ets
@@ -0,0 +1,5 @@
+import abilityTest from './Ability.test';
+
+export default function testsuite() {
+  abilityTest();
+}
\ No newline at end of file
diff --git a/entry/src/ohosTest/module.json5 b/entry/src/ohosTest/module.json5
new file mode 100644
index 0000000..509a3a2
--- /dev/null
+++ b/entry/src/ohosTest/module.json5
@@ -0,0 +1,11 @@
+{
+  "module": {
+    "name": "entry_test",
+    "type": "feature",
+    "deviceTypes": [
+      "phone"
+    ],
+    "deliveryWithInstall": true,
+    "installationFree": false
+  }
+}
diff --git a/entry/src/test/List.test.ets b/entry/src/test/List.test.ets
new file mode 100644
index 0000000..bb5b5c3
--- /dev/null
+++ b/entry/src/test/List.test.ets
@@ -0,0 +1,5 @@
+import localUnitTest from './LocalUnit.test';
+
+export default function testsuite() {
+  localUnitTest();
+}
\ No newline at end of file
diff --git a/entry/src/test/LocalUnit.test.ets b/entry/src/test/LocalUnit.test.ets
new file mode 100644
index 0000000..165fc16
--- /dev/null
+++ b/entry/src/test/LocalUnit.test.ets
@@ -0,0 +1,33 @@
+import { describe, beforeAll, beforeEach, afterEach, afterAll, it, expect } from '@ohos/hypium';
+
+export default function localUnitTest() {
+  describe('localUnitTest', () => {
+    // Defines a test suite. Two parameters are supported: test suite name and test suite function.
+    beforeAll(() => {
+      // Presets an action, which is performed only once before all test cases of the test suite start.
+      // This API supports only one parameter: preset action function.
+    });
+    beforeEach(() => {
+      // Presets an action, which is performed before each unit test case starts.
+      // The number of execution times is the same as the number of test cases defined by **it**.
+      // This API supports only one parameter: preset action function.
+    });
+    afterEach(() => {
+      // Presets a clear action, which is performed after each unit test case ends.
+      // The number of execution times is the same as the number of test cases defined by **it**.
+      // This API supports only one parameter: clear action function.
+    });
+    afterAll(() => {
+      // Presets a clear action, which is performed after all test cases of the test suite end.
+      // This API supports only one parameter: clear action function.
+    });
+    it('assertContain', 0, () => {
+      // Defines a test case. This API supports three parameters: test case name, filter parameter, and test case function.
+      let a = 'abc';
+      let b = 'b';
+      // Defines a variety of assertion methods, which are used to declare expected boolean conditions.
+      expect(a).assertContain(b);
+      expect(a).assertEqual(a);
+    });
+  });
+}
\ No newline at end of file
diff --git a/hvigor/hvigor-config.json5 b/hvigor/hvigor-config.json5
new file mode 100644
index 0000000..8053eee
--- /dev/null
+++ b/hvigor/hvigor-config.json5
@@ -0,0 +1,24 @@
+{
+  "modelVersion": "6.1.0",
+  "dependencies": {
+    "@ohos/hvigor-ohos-arkui-x-plugin": "4.23.5"
+  },
+  "execution": {
+    // "analyze": "normal",                     /* Define the build analyze mode. Value: [ "normal" | "advanced" | "ultrafine" | false ]. Default: "normal" */
+    // "daemon": true,                          /* Enable daemon compilation. Value: [ true | false ]. Default: true */
+    // "incremental": true,                     /* Enable incremental compilation. Value: [ true | false ]. Default: true */
+    // "parallel": true,                        /* Enable parallel compilation. Value: [ true | false ]. Default: true */
+    // "typeCheck": false,                      /* Enable typeCheck. Value: [ true | false ]. Default: false */
+    // "optimizationStrategy": "memory"         /* Define the optimization strategy. Value: [ "memory" | "performance" ]. Default: "memory" */
+  },
+  "logging": {
+    // "level": "info"                          /* Define the log level. Value: [ "debug" | "info" | "warn" | "error" ]. Default: "info" */
+  },
+  "debugging": {
+    // "stacktrace": false                      /* Disable stacktrace compilation. Value: [ true | false ]. Default: false */
+  },
+  "nodeOptions": {
+    // "maxOldSpaceSize": 8192                  /* Enable nodeOptions maxOldSpaceSize compilation. Unit M. Used for the daemon process. Default: 8192*/
+    // "exposeGC": true                         /* Enable to trigger garbage collection explicitly. Default: true*/
+  }
+}
\ No newline at end of file
diff --git a/hvigorfile.ts b/hvigorfile.ts
new file mode 100644
index 0000000..38cd772
--- /dev/null
+++ b/hvigorfile.ts
@@ -0,0 +1,2 @@
+// Script for compiling build behavior. It is built in the build plug-in and cannot be modified currently.
+export { AppTasksForArkUIX } from '@ohos/hvigor-ohos-arkui-x-plugin';
diff --git a/mqtt-backend/README.md b/mqtt-backend/README.md
new file mode 100644
index 0000000..5e38343
--- /dev/null
+++ b/mqtt-backend/README.md
@@ -0,0 +1,138 @@
+# MQTT Backend - 水情监测系统MQTT后端
+
+为HarmonyOS水情监测应用提供MQTT消息服务。
+
+## 目录结构
+
+```
+mqtt-backend/
+├── server.js      # MQTT Broker服务器
+├── simulator.js   # 模拟数据发送器
+├── package.json   # 项目配置
+└── README.md      # 说明文档
+```
+
+## 快速开始
+
+### 1. 安装依赖
+
+```bash
+cd mqtt-backend
+npm install
+```
+
+### 2. 启动MQTT Broker
+
+```bash
+npm start
+# 或
+node server.js
+```
+
+服务器将在 `0.0.0.0:1883` 端口启动，输出如下：
+```
+========================================
+   MQTT Broker 服务器已启动
+========================================
+监听地址: mqtt://0.0.0.0:1883
+认证用户: admin
+认证密码: admin
+```
+
+### 3. 启动数据模拟器（可选）
+
+如果需要自动发送模拟数据：
+
+```bash
+node simulator.js
+```
+
+模拟器将每3秒发送一次随机水质数据。
+
+## MQTTX 配置
+
+使用MQTTX客户端连接和测试：
+
+### 连接配置
+
+| 参数 | 值 |
+|------|-----|
+| Name | WaterMonitor |
+| Protocol | mqtt:// |
+| Host | localhost 或 192.168.xxx.xxx |
+| Port | 1883 |
+| Username | admin |
+| Password | admin |
+| Client ID | mqttx-test |
+
+### 发布消息
+
+**主题**: `sea_status`
+
+**消息格式** (JSON):
+```json
+{
+  "temp": 25.5,
+  "ph": 7.2,
+  "conductivity": 850,
+  "cod": 35,
+  "ammoniaNitrogen": 0.3,
+  "residualChlorine": 0.4
+}
+```
+
+### 字段说明
+
+| 字段 | 说明 | 单位 | 正常范围 |
+|------|------|------|----------|
+| temp | 水温 | °C | 15-30 |
+| ph | pH值 | - | 6.5-8.5 |
+| conductivity | 电导率 | μS/cm | 500-1500 |
+| cod | COD | mg/L | ≤40 |
+| ammoniaNitrogen | 氨氮 | mg/L | ≤1.0 |
+| residualChlorine | 余氯 | mg/L | 0.3-0.5 |
+
+## HarmonyOS应用配置
+
+应用中的MQTT配置位于 `entry/src/main/ets/utils/MqttService.ets`：
+
+```typescript
+this.mqttService.setConfig('tcp://192.168.xxx.xxx:1883', 'sea_status');
+```
+
+请将IP地址改为运行MQTT Broker的电脑IP。
+
+### 获取本机IP
+
+Windows:
+```bash
+ipconfig
+```
+
+查找 "IPv4 地址" 一行，例如 `192.168.31.100`。
+
+## 测试流程
+
+1. 启动MQTT Broker: `node server.js`
+2. 打开MQTTX，连接到Broker
+3. 订阅主题 `sea_status`（查看消息）
+4. 发布测试消息到 `sea_status`
+5. 在HarmonyOS应用中查看数据是否更新
+
+## 故障排查
+
+### 连接失败
+
+- 检查IP地址是否正确
+- 检查防火墙是否允许1883端口
+- 检查用户名密码是否为 `admin/admin`
+
+### 数据不显示
+
+- 检查主题是否为 `sea_status`
+- 检查JSON格式是否正确
+- 查看HarmonyOS应用日志
+
+### 端口占用
+
+如果1883端口被占用，可以修改 `server.js` 中的 `PORT` 常量。
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/.bin/mqtt b/mqtt-backend/node_modules/.bin/mqtt
new file mode 100644
index 0000000..6bd52be
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/mqtt
@@ -0,0 +1,16 @@
+#!/bin/sh
+basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
+
+case `uname` in
+    *CYGWIN*|*MINGW*|*MSYS*)
+        if command -v cygpath > /dev/null 2>&1; then
+            basedir=`cygpath -w "$basedir"`
+        fi
+    ;;
+esac
+
+if [ -x "$basedir/node" ]; then
+  exec "$basedir/node"  "$basedir/../mqtt/build/bin/mqtt.js" "$@"
+else 
+  exec node  "$basedir/../mqtt/build/bin/mqtt.js" "$@"
+fi
diff --git a/mqtt-backend/node_modules/.bin/mqtt.cmd b/mqtt-backend/node_modules/.bin/mqtt.cmd
new file mode 100644
index 0000000..b8dcc79
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/mqtt.cmd
@@ -0,0 +1,17 @@
+@ECHO off
+GOTO start
+:find_dp0
+SET dp0=%~dp0
+EXIT /b
+:start
+SETLOCAL
+CALL :find_dp0
+
+IF EXIST "%dp0%\node.exe" (
+  SET "_prog=%dp0%\node.exe"
+) ELSE (
+  SET "_prog=node"
+  SET PATHEXT=%PATHEXT:;.JS;=;%
+)
+
+endLocal & goto #_undefined_# 2>NUL || title %COMSPEC% & "%_prog%"  "%dp0%\..\mqtt\build\bin\mqtt.js" %*
diff --git a/mqtt-backend/node_modules/.bin/mqtt.ps1 b/mqtt-backend/node_modules/.bin/mqtt.ps1
new file mode 100644
index 0000000..5c189bb
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/mqtt.ps1
@@ -0,0 +1,28 @@
+#!/usr/bin/env pwsh
+$basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
+
+$exe=""
+if ($PSVersionTable.PSVersion -lt "6.0" -or $IsWindows) {
+  # Fix case when both the Windows and Linux builds of Node
+  # are installed in the same directory
+  $exe=".exe"
+}
+$ret=0
+if (Test-Path "$basedir/node$exe") {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "$basedir/node$exe"  "$basedir/../mqtt/build/bin/mqtt.js" $args
+  } else {
+    & "$basedir/node$exe"  "$basedir/../mqtt/build/bin/mqtt.js" $args
+  }
+  $ret=$LASTEXITCODE
+} else {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "node$exe"  "$basedir/../mqtt/build/bin/mqtt.js" $args
+  } else {
+    & "node$exe"  "$basedir/../mqtt/build/bin/mqtt.js" $args
+  }
+  $ret=$LASTEXITCODE
+}
+exit $ret
diff --git a/mqtt-backend/node_modules/.bin/mqtt_pub b/mqtt-backend/node_modules/.bin/mqtt_pub
new file mode 100644
index 0000000..84e711e
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/mqtt_pub
@@ -0,0 +1,16 @@
+#!/bin/sh
+basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
+
+case `uname` in
+    *CYGWIN*|*MINGW*|*MSYS*)
+        if command -v cygpath > /dev/null 2>&1; then
+            basedir=`cygpath -w "$basedir"`
+        fi
+    ;;
+esac
+
+if [ -x "$basedir/node" ]; then
+  exec "$basedir/node"  "$basedir/../mqtt/build/bin/pub.js" "$@"
+else 
+  exec node  "$basedir/../mqtt/build/bin/pub.js" "$@"
+fi
diff --git a/mqtt-backend/node_modules/.bin/mqtt_pub.cmd b/mqtt-backend/node_modules/.bin/mqtt_pub.cmd
new file mode 100644
index 0000000..1a6a7e7
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/mqtt_pub.cmd
@@ -0,0 +1,17 @@
+@ECHO off
+GOTO start
+:find_dp0
+SET dp0=%~dp0
+EXIT /b
+:start
+SETLOCAL
+CALL :find_dp0
+
+IF EXIST "%dp0%\node.exe" (
+  SET "_prog=%dp0%\node.exe"
+) ELSE (
+  SET "_prog=node"
+  SET PATHEXT=%PATHEXT:;.JS;=;%
+)
+
+endLocal & goto #_undefined_# 2>NUL || title %COMSPEC% & "%_prog%"  "%dp0%\..\mqtt\build\bin\pub.js" %*
diff --git a/mqtt-backend/node_modules/.bin/mqtt_pub.ps1 b/mqtt-backend/node_modules/.bin/mqtt_pub.ps1
new file mode 100644
index 0000000..daacf05
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/mqtt_pub.ps1
@@ -0,0 +1,28 @@
+#!/usr/bin/env pwsh
+$basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
+
+$exe=""
+if ($PSVersionTable.PSVersion -lt "6.0" -or $IsWindows) {
+  # Fix case when both the Windows and Linux builds of Node
+  # are installed in the same directory
+  $exe=".exe"
+}
+$ret=0
+if (Test-Path "$basedir/node$exe") {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "$basedir/node$exe"  "$basedir/../mqtt/build/bin/pub.js" $args
+  } else {
+    & "$basedir/node$exe"  "$basedir/../mqtt/build/bin/pub.js" $args
+  }
+  $ret=$LASTEXITCODE
+} else {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "node$exe"  "$basedir/../mqtt/build/bin/pub.js" $args
+  } else {
+    & "node$exe"  "$basedir/../mqtt/build/bin/pub.js" $args
+  }
+  $ret=$LASTEXITCODE
+}
+exit $ret
diff --git a/mqtt-backend/node_modules/.bin/mqtt_sub b/mqtt-backend/node_modules/.bin/mqtt_sub
new file mode 100644
index 0000000..269b6e5
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/mqtt_sub
@@ -0,0 +1,16 @@
+#!/bin/sh
+basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
+
+case `uname` in
+    *CYGWIN*|*MINGW*|*MSYS*)
+        if command -v cygpath > /dev/null 2>&1; then
+            basedir=`cygpath -w "$basedir"`
+        fi
+    ;;
+esac
+
+if [ -x "$basedir/node" ]; then
+  exec "$basedir/node"  "$basedir/../mqtt/build/bin/sub.js" "$@"
+else 
+  exec node  "$basedir/../mqtt/build/bin/sub.js" "$@"
+fi
diff --git a/mqtt-backend/node_modules/.bin/mqtt_sub.cmd b/mqtt-backend/node_modules/.bin/mqtt_sub.cmd
new file mode 100644
index 0000000..d7c3d30
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/mqtt_sub.cmd
@@ -0,0 +1,17 @@
+@ECHO off
+GOTO start
+:find_dp0
+SET dp0=%~dp0
+EXIT /b
+:start
+SETLOCAL
+CALL :find_dp0
+
+IF EXIST "%dp0%\node.exe" (
+  SET "_prog=%dp0%\node.exe"
+) ELSE (
+  SET "_prog=node"
+  SET PATHEXT=%PATHEXT:;.JS;=;%
+)
+
+endLocal & goto #_undefined_# 2>NUL || title %COMSPEC% & "%_prog%"  "%dp0%\..\mqtt\build\bin\sub.js" %*
diff --git a/mqtt-backend/node_modules/.bin/mqtt_sub.ps1 b/mqtt-backend/node_modules/.bin/mqtt_sub.ps1
new file mode 100644
index 0000000..11d95d6
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/mqtt_sub.ps1
@@ -0,0 +1,28 @@
+#!/usr/bin/env pwsh
+$basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
+
+$exe=""
+if ($PSVersionTable.PSVersion -lt "6.0" -or $IsWindows) {
+  # Fix case when both the Windows and Linux builds of Node
+  # are installed in the same directory
+  $exe=".exe"
+}
+$ret=0
+if (Test-Path "$basedir/node$exe") {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "$basedir/node$exe"  "$basedir/../mqtt/build/bin/sub.js" $args
+  } else {
+    & "$basedir/node$exe"  "$basedir/../mqtt/build/bin/sub.js" $args
+  }
+  $ret=$LASTEXITCODE
+} else {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "node$exe"  "$basedir/../mqtt/build/bin/sub.js" $args
+  } else {
+    & "node$exe"  "$basedir/../mqtt/build/bin/sub.js" $args
+  }
+  $ret=$LASTEXITCODE
+}
+exit $ret
diff --git a/mqtt-backend/node_modules/.bin/uuid b/mqtt-backend/node_modules/.bin/uuid
new file mode 100644
index 0000000..0c2d469
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/uuid
@@ -0,0 +1,16 @@
+#!/bin/sh
+basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
+
+case `uname` in
+    *CYGWIN*|*MINGW*|*MSYS*)
+        if command -v cygpath > /dev/null 2>&1; then
+            basedir=`cygpath -w "$basedir"`
+        fi
+    ;;
+esac
+
+if [ -x "$basedir/node" ]; then
+  exec "$basedir/node"  "$basedir/../uuid/dist/bin/uuid" "$@"
+else 
+  exec node  "$basedir/../uuid/dist/bin/uuid" "$@"
+fi
diff --git a/mqtt-backend/node_modules/.bin/uuid.cmd b/mqtt-backend/node_modules/.bin/uuid.cmd
new file mode 100644
index 0000000..0f2376e
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/uuid.cmd
@@ -0,0 +1,17 @@
+@ECHO off
+GOTO start
+:find_dp0
+SET dp0=%~dp0
+EXIT /b
+:start
+SETLOCAL
+CALL :find_dp0
+
+IF EXIST "%dp0%\node.exe" (
+  SET "_prog=%dp0%\node.exe"
+) ELSE (
+  SET "_prog=node"
+  SET PATHEXT=%PATHEXT:;.JS;=;%
+)
+
+endLocal & goto #_undefined_# 2>NUL || title %COMSPEC% & "%_prog%"  "%dp0%\..\uuid\dist\bin\uuid" %*
diff --git a/mqtt-backend/node_modules/.bin/uuid.ps1 b/mqtt-backend/node_modules/.bin/uuid.ps1
new file mode 100644
index 0000000..7804628
--- /dev/null
+++ b/mqtt-backend/node_modules/.bin/uuid.ps1
@@ -0,0 +1,28 @@
+#!/usr/bin/env pwsh
+$basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
+
+$exe=""
+if ($PSVersionTable.PSVersion -lt "6.0" -or $IsWindows) {
+  # Fix case when both the Windows and Linux builds of Node
+  # are installed in the same directory
+  $exe=".exe"
+}
+$ret=0
+if (Test-Path "$basedir/node$exe") {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "$basedir/node$exe"  "$basedir/../uuid/dist/bin/uuid" $args
+  } else {
+    & "$basedir/node$exe"  "$basedir/../uuid/dist/bin/uuid" $args
+  }
+  $ret=$LASTEXITCODE
+} else {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "node$exe"  "$basedir/../uuid/dist/bin/uuid" $args
+  } else {
+    & "node$exe"  "$basedir/../uuid/dist/bin/uuid" $args
+  }
+  $ret=$LASTEXITCODE
+}
+exit $ret
diff --git a/mqtt-backend/node_modules/.package-lock.json b/mqtt-backend/node_modules/.package-lock.json
new file mode 100644
index 0000000..193ffd5
--- /dev/null
+++ b/mqtt-backend/node_modules/.package-lock.json
@@ -0,0 +1,862 @@
+{
+  "name": "mqtt-backend",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "node_modules/@babel/runtime": {
+      "version": "7.29.2",
+      "resolved": "https://registry.npmmirror.com/@babel/runtime/-/runtime-7.29.2.tgz",
+      "integrity": "sha512-JiDShH45zKHWyGe4ZNVRrCjBz8Nh9TMmZG1kh4QTK8hCBTWBi8Da+i7s1fJw7/lYpM4ccepSNfqzZ/QvABBi5g==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@types/node": {
+      "version": "25.6.0",
+      "resolved": "https://registry.npmmirror.com/@types/node/-/node-25.6.0.tgz",
+      "integrity": "sha512-+qIYRKdNYJwY3vRCZMdJbPLJAtGjQBudzZzdzwQYkEPQd+PJGixUL5QfvCLDaULoLv+RhT3LDkwEfKaAkgSmNQ==",
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~7.19.0"
+      }
+    },
+    "node_modules/@types/readable-stream": {
+      "version": "4.0.23",
+      "resolved": "https://registry.npmmirror.com/@types/readable-stream/-/readable-stream-4.0.23.tgz",
+      "integrity": "sha512-wwXrtQvbMHxCbBgjHaMGEmImFTQxxpfMOR/ZoQnXxB1woqkUbdLGFDgauo00Py9IudiaqSeiBiulSV9i6XIPig==",
+      "license": "MIT",
+      "dependencies": {
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+}
diff --git a/mqtt-backend/node_modules/@babel/runtime/LICENSE b/mqtt-backend/node_modules/@babel/runtime/LICENSE
new file mode 100644
index 0000000..f31575e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/LICENSE
@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) 2014-present Sebastian McKenzie and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/@babel/runtime/README.md b/mqtt-backend/node_modules/@babel/runtime/README.md
new file mode 100644
index 0000000..2f3368e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/README.md
@@ -0,0 +1,19 @@
+# @babel/runtime
+
+> babel's modular runtime helpers
+
+See our website [@babel/runtime](https://babeljs.io/docs/babel-runtime) for more information.
+
+## Install
+
+Using npm:
+
+```sh
+npm install --save @babel/runtime
+```
+
+or using yarn:
+
+```sh
+yarn add @babel/runtime
+```
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/AwaitValue.js b/mqtt-backend/node_modules/@babel/runtime/helpers/AwaitValue.js
new file mode 100644
index 0000000..52a7e69
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/AwaitValue.js
@@ -0,0 +1,4 @@
+function _AwaitValue(t) {
+  this.wrapped = t;
+}
+module.exports = _AwaitValue, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/OverloadYield.js b/mqtt-backend/node_modules/@babel/runtime/helpers/OverloadYield.js
new file mode 100644
index 0000000..0eca88c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/OverloadYield.js
@@ -0,0 +1,4 @@
+function _OverloadYield(e, d) {
+  this.v = e, this.k = d;
+}
+module.exports = _OverloadYield, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecoratedDescriptor.js b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecoratedDescriptor.js
new file mode 100644
index 0000000..0ff780e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecoratedDescriptor.js
@@ -0,0 +1,9 @@
+function _applyDecoratedDescriptor(i, e, r, n, l) {
+  var a = {};
+  return Object.keys(n).forEach(function (i) {
+    a[i] = n[i];
+  }), a.enumerable = !!a.enumerable, a.configurable = !!a.configurable, ("value" in a || a.initializer) && (a.writable = !0), a = r.slice().reverse().reduce(function (r, n) {
+    return n(i, e, r) || r;
+  }, a), l && void 0 !== a.initializer && (a.value = a.initializer ? a.initializer.call(l) : void 0, a.initializer = void 0), void 0 === a.initializer ? (Object.defineProperty(i, e, a), null) : a;
+}
+module.exports = _applyDecoratedDescriptor, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs.js b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs.js
new file mode 100644
index 0000000..3770c5a
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs.js
@@ -0,0 +1,236 @@
+var _typeof = require("./typeof.js")["default"];
+var setFunctionName = require("./setFunctionName.js");
+var toPropertyKey = require("./toPropertyKey.js");
+function old_createMetadataMethodsForProperty(e, t, a, r) {
+  return {
+    getMetadata: function getMetadata(o) {
+      old_assertNotFinished(r, "getMetadata"), old_assertMetadataKey(o);
+      var i = e[o];
+      if (void 0 !== i) if (1 === t) {
+        var n = i["public"];
+        if (void 0 !== n) return n[a];
+      } else if (2 === t) {
+        var l = i["private"];
+        if (void 0 !== l) return l.get(a);
+      } else if (Object.hasOwnProperty.call(i, "constructor")) return i.constructor;
+    },
+    setMetadata: function setMetadata(o, i) {
+      old_assertNotFinished(r, "setMetadata"), old_assertMetadataKey(o);
+      var n = e[o];
+      if (void 0 === n && (n = e[o] = {}), 1 === t) {
+        var l = n["public"];
+        void 0 === l && (l = n["public"] = {}), l[a] = i;
+      } else if (2 === t) {
+        var s = n.priv;
+        void 0 === s && (s = n["private"] = new Map()), s.set(a, i);
+      } else n.constructor = i;
+    }
+  };
+}
+function old_convertMetadataMapToFinal(e, t) {
+  var a = e[Symbol.metadata || Symbol["for"]("Symbol.metadata")],
+    r = Object.getOwnPropertySymbols(t);
+  if (0 !== r.length) {
+    for (var o = 0; o < r.length; o++) {
+      var i = r[o],
+        n = t[i],
+        l = a ? a[i] : null,
+        s = n["public"],
+        c = l ? l["public"] : null;
+      s && c && Object.setPrototypeOf(s, c);
+      var d = n["private"];
+      if (d) {
+        var u = Array.from(d.values()),
+          f = l ? l["private"] : null;
+        f && (u = u.concat(f)), n["private"] = u;
+      }
+      l && Object.setPrototypeOf(n, l);
+    }
+    a && Object.setPrototypeOf(t, a), e[Symbol.metadata || Symbol["for"]("Symbol.metadata")] = t;
+  }
+}
+function old_createAddInitializerMethod(e, t) {
+  return function (a) {
+    old_assertNotFinished(t, "addInitializer"), old_assertCallable(a, "An initializer"), e.push(a);
+  };
+}
+function old_memberDec(e, t, a, r, o, i, n, l, s) {
+  var c;
+  switch (i) {
+    case 1:
+      c = "accessor";
+      break;
+    case 2:
+      c = "method";
+      break;
+    case 3:
+      c = "getter";
+      break;
+    case 4:
+      c = "setter";
+      break;
+    default:
+      c = "field";
+  }
+  var d,
+    u,
+    f = {
+      kind: c,
+      name: l ? "#" + t : toPropertyKey(t),
+      isStatic: n,
+      isPrivate: l
+    },
+    p = {
+      v: !1
+    };
+  if (0 !== i && (f.addInitializer = old_createAddInitializerMethod(o, p)), l) {
+    d = 2, u = Symbol(t);
+    var v = {};
+    0 === i ? (v.get = a.get, v.set = a.set) : 2 === i ? v.get = function () {
+      return a.value;
+    } : (1 !== i && 3 !== i || (v.get = function () {
+      return a.get.call(this);
+    }), 1 !== i && 4 !== i || (v.set = function (e) {
+      a.set.call(this, e);
+    })), f.access = v;
+  } else d = 1, u = t;
+  try {
+    return e(s, Object.assign(f, old_createMetadataMethodsForProperty(r, d, u, p)));
+  } finally {
+    p.v = !0;
+  }
+}
+function old_assertNotFinished(e, t) {
+  if (e.v) throw Error("attempted to call " + t + " after decoration was finished");
+}
+function old_assertMetadataKey(e) {
+  if ("symbol" != _typeof(e)) throw new TypeError("Metadata keys must be symbols, received: " + e);
+}
+function old_assertCallable(e, t) {
+  if ("function" != typeof e) throw new TypeError(t + " must be a function");
+}
+function old_assertValidReturnValue(e, t) {
+  var a = _typeof(t);
+  if (1 === e) {
+    if ("object" !== a || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
+    void 0 !== t.get && old_assertCallable(t.get, "accessor.get"), void 0 !== t.set && old_assertCallable(t.set, "accessor.set"), void 0 !== t.init && old_assertCallable(t.init, "accessor.init"), void 0 !== t.initializer && old_assertCallable(t.initializer, "accessor.initializer");
+  } else if ("function" !== a) throw new TypeError((0 === e ? "field" : 10 === e ? "class" : "method") + " decorators must return a function or void 0");
+}
+function old_getInit(e) {
+  var t;
+  return null == (t = e.init) && (t = e.initializer) && void 0 !== console && console.warn(".initializer has been renamed to .init as of March 2022"), t;
+}
+function old_applyMemberDec(e, t, a, r, o, i, n, l, s) {
+  var c,
+    d,
+    u,
+    f,
+    p,
+    v,
+    y,
+    h = a[0];
+  if (n ? (0 === o || 1 === o ? (c = {
+    get: a[3],
+    set: a[4]
+  }, u = "get") : 3 === o ? (c = {
+    get: a[3]
+  }, u = "get") : 4 === o ? (c = {
+    set: a[3]
+  }, u = "set") : c = {
+    value: a[3]
+  }, 0 !== o && (1 === o && setFunctionName(a[4], "#" + r, "set"), setFunctionName(a[3], "#" + r, u))) : 0 !== o && (c = Object.getOwnPropertyDescriptor(t, r)), 1 === o ? f = {
+    get: c.get,
+    set: c.set
+  } : 2 === o ? f = c.value : 3 === o ? f = c.get : 4 === o && (f = c.set), "function" == typeof h) void 0 !== (p = old_memberDec(h, r, c, l, s, o, i, n, f)) && (old_assertValidReturnValue(o, p), 0 === o ? d = p : 1 === o ? (d = old_getInit(p), v = p.get || f.get, y = p.set || f.set, f = {
+    get: v,
+    set: y
+  }) : f = p);else for (var m = h.length - 1; m >= 0; m--) {
+    var b;
+    void 0 !== (p = old_memberDec(h[m], r, c, l, s, o, i, n, f)) && (old_assertValidReturnValue(o, p), 0 === o ? b = p : 1 === o ? (b = old_getInit(p), v = p.get || f.get, y = p.set || f.set, f = {
+      get: v,
+      set: y
+    }) : f = p, void 0 !== b && (void 0 === d ? d = b : "function" == typeof d ? d = [d, b] : d.push(b)));
+  }
+  if (0 === o || 1 === o) {
+    if (void 0 === d) d = function d(e, t) {
+      return t;
+    };else if ("function" != typeof d) {
+      var g = d;
+      d = function d(e, t) {
+        for (var a = t, r = 0; r < g.length; r++) a = g[r].call(e, a);
+        return a;
+      };
+    } else {
+      var _ = d;
+      d = function d(e, t) {
+        return _.call(e, t);
+      };
+    }
+    e.push(d);
+  }
+  0 !== o && (1 === o ? (c.get = f.get, c.set = f.set) : 2 === o ? c.value = f : 3 === o ? c.get = f : 4 === o && (c.set = f), n ? 1 === o ? (e.push(function (e, t) {
+    return f.get.call(e, t);
+  }), e.push(function (e, t) {
+    return f.set.call(e, t);
+  })) : 2 === o ? e.push(f) : e.push(function (e, t) {
+    return f.call(e, t);
+  }) : Object.defineProperty(t, r, c));
+}
+function old_applyMemberDecs(e, t, a, r, o) {
+  for (var i, n, l = new Map(), s = new Map(), c = 0; c < o.length; c++) {
+    var d = o[c];
+    if (Array.isArray(d)) {
+      var u,
+        f,
+        p,
+        v = d[1],
+        y = d[2],
+        h = d.length > 3,
+        m = v >= 5;
+      if (m ? (u = t, f = r, 0 != (v -= 5) && (p = n = n || [])) : (u = t.prototype, f = a, 0 !== v && (p = i = i || [])), 0 !== v && !h) {
+        var b = m ? s : l,
+          g = b.get(y) || 0;
+        if (!0 === g || 3 === g && 4 !== v || 4 === g && 3 !== v) throw Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + y);
+        !g && v > 2 ? b.set(y, v) : b.set(y, !0);
+      }
+      old_applyMemberDec(e, u, d, y, v, m, h, f, p);
+    }
+  }
+  old_pushInitializers(e, i), old_pushInitializers(e, n);
+}
+function old_pushInitializers(e, t) {
+  t && e.push(function (e) {
+    for (var a = 0; a < t.length; a++) t[a].call(e);
+    return e;
+  });
+}
+function old_applyClassDecs(e, t, a, r) {
+  if (r.length > 0) {
+    for (var o = [], i = t, n = t.name, l = r.length - 1; l >= 0; l--) {
+      var s = {
+        v: !1
+      };
+      try {
+        var c = Object.assign({
+            kind: "class",
+            name: n,
+            addInitializer: old_createAddInitializerMethod(o, s)
+          }, old_createMetadataMethodsForProperty(a, 0, n, s)),
+          d = r[l](i, c);
+      } finally {
+        s.v = !0;
+      }
+      void 0 !== d && (old_assertValidReturnValue(10, d), i = d);
+    }
+    e.push(i, function () {
+      for (var e = 0; e < o.length; e++) o[e].call(i);
+    });
+  }
+}
+function applyDecs(e, t, a) {
+  var r = [],
+    o = {},
+    i = {};
+  return old_applyMemberDecs(r, e, i, o, t), old_convertMetadataMapToFinal(e.prototype, i), old_applyClassDecs(r, e, o, a), old_convertMetadataMapToFinal(e, o), r;
+}
+module.exports = applyDecs, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2203.js b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2203.js
new file mode 100644
index 0000000..5af267c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2203.js
@@ -0,0 +1,184 @@
+var _typeof = require("./typeof.js")["default"];
+function applyDecs2203Factory() {
+  function createAddInitializerMethod(e, t) {
+    return function (r) {
+      !function (e) {
+        if (e.v) throw Error("attempted to call addInitializer after decoration was finished");
+      }(t), assertCallable(r, "An initializer"), e.push(r);
+    };
+  }
+  function memberDec(e, t, r, a, n, i, s, o) {
+    var c;
+    switch (n) {
+      case 1:
+        c = "accessor";
+        break;
+      case 2:
+        c = "method";
+        break;
+      case 3:
+        c = "getter";
+        break;
+      case 4:
+        c = "setter";
+        break;
+      default:
+        c = "field";
+    }
+    var l,
+      u,
+      f = {
+        kind: c,
+        name: s ? "#" + t : t,
+        "static": i,
+        "private": s
+      },
+      p = {
+        v: !1
+      };
+    0 !== n && (f.addInitializer = createAddInitializerMethod(a, p)), 0 === n ? s ? (l = r.get, u = r.set) : (l = function l() {
+      return this[t];
+    }, u = function u(e) {
+      this[t] = e;
+    }) : 2 === n ? l = function l() {
+      return r.value;
+    } : (1 !== n && 3 !== n || (l = function l() {
+      return r.get.call(this);
+    }), 1 !== n && 4 !== n || (u = function u(e) {
+      r.set.call(this, e);
+    })), f.access = l && u ? {
+      get: l,
+      set: u
+    } : l ? {
+      get: l
+    } : {
+      set: u
+    };
+    try {
+      return e(o, f);
+    } finally {
+      p.v = !0;
+    }
+  }
+  function assertCallable(e, t) {
+    if ("function" != typeof e) throw new TypeError(t + " must be a function");
+  }
+  function assertValidReturnValue(e, t) {
+    var r = _typeof(t);
+    if (1 === e) {
+      if ("object" !== r || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
+      void 0 !== t.get && assertCallable(t.get, "accessor.get"), void 0 !== t.set && assertCallable(t.set, "accessor.set"), void 0 !== t.init && assertCallable(t.init, "accessor.init");
+    } else if ("function" !== r) throw new TypeError((0 === e ? "field" : 10 === e ? "class" : "method") + " decorators must return a function or void 0");
+  }
+  function applyMemberDec(e, t, r, a, n, i, s, o) {
+    var c,
+      l,
+      u,
+      f,
+      p,
+      d,
+      h = r[0];
+    if (s ? c = 0 === n || 1 === n ? {
+      get: r[3],
+      set: r[4]
+    } : 3 === n ? {
+      get: r[3]
+    } : 4 === n ? {
+      set: r[3]
+    } : {
+      value: r[3]
+    } : 0 !== n && (c = Object.getOwnPropertyDescriptor(t, a)), 1 === n ? u = {
+      get: c.get,
+      set: c.set
+    } : 2 === n ? u = c.value : 3 === n ? u = c.get : 4 === n && (u = c.set), "function" == typeof h) void 0 !== (f = memberDec(h, a, c, o, n, i, s, u)) && (assertValidReturnValue(n, f), 0 === n ? l = f : 1 === n ? (l = f.init, p = f.get || u.get, d = f.set || u.set, u = {
+      get: p,
+      set: d
+    }) : u = f);else for (var v = h.length - 1; v >= 0; v--) {
+      var g;
+      void 0 !== (f = memberDec(h[v], a, c, o, n, i, s, u)) && (assertValidReturnValue(n, f), 0 === n ? g = f : 1 === n ? (g = f.init, p = f.get || u.get, d = f.set || u.set, u = {
+        get: p,
+        set: d
+      }) : u = f, void 0 !== g && (void 0 === l ? l = g : "function" == typeof l ? l = [l, g] : l.push(g)));
+    }
+    if (0 === n || 1 === n) {
+      if (void 0 === l) l = function l(e, t) {
+        return t;
+      };else if ("function" != typeof l) {
+        var y = l;
+        l = function l(e, t) {
+          for (var r = t, a = 0; a < y.length; a++) r = y[a].call(e, r);
+          return r;
+        };
+      } else {
+        var m = l;
+        l = function l(e, t) {
+          return m.call(e, t);
+        };
+      }
+      e.push(l);
+    }
+    0 !== n && (1 === n ? (c.get = u.get, c.set = u.set) : 2 === n ? c.value = u : 3 === n ? c.get = u : 4 === n && (c.set = u), s ? 1 === n ? (e.push(function (e, t) {
+      return u.get.call(e, t);
+    }), e.push(function (e, t) {
+      return u.set.call(e, t);
+    })) : 2 === n ? e.push(u) : e.push(function (e, t) {
+      return u.call(e, t);
+    }) : Object.defineProperty(t, a, c));
+  }
+  function pushInitializers(e, t) {
+    t && e.push(function (e) {
+      for (var r = 0; r < t.length; r++) t[r].call(e);
+      return e;
+    });
+  }
+  return function (e, t, r) {
+    var a = [];
+    return function (e, t, r) {
+      for (var a, n, i = new Map(), s = new Map(), o = 0; o < r.length; o++) {
+        var c = r[o];
+        if (Array.isArray(c)) {
+          var l,
+            u,
+            f = c[1],
+            p = c[2],
+            d = c.length > 3,
+            h = f >= 5;
+          if (h ? (l = t, 0 != (f -= 5) && (u = n = n || [])) : (l = t.prototype, 0 !== f && (u = a = a || [])), 0 !== f && !d) {
+            var v = h ? s : i,
+              g = v.get(p) || 0;
+            if (!0 === g || 3 === g && 4 !== f || 4 === g && 3 !== f) throw Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + p);
+            !g && f > 2 ? v.set(p, f) : v.set(p, !0);
+          }
+          applyMemberDec(e, l, c, p, f, h, d, u);
+        }
+      }
+      pushInitializers(e, a), pushInitializers(e, n);
+    }(a, e, t), function (e, t, r) {
+      if (r.length > 0) {
+        for (var a = [], n = t, i = t.name, s = r.length - 1; s >= 0; s--) {
+          var o = {
+            v: !1
+          };
+          try {
+            var c = r[s](n, {
+              kind: "class",
+              name: i,
+              addInitializer: createAddInitializerMethod(a, o)
+            });
+          } finally {
+            o.v = !0;
+          }
+          void 0 !== c && (assertValidReturnValue(10, c), n = c);
+        }
+        e.push(n, function () {
+          for (var e = 0; e < a.length; e++) a[e].call(n);
+        });
+      }
+    }(a, e, r), a;
+  };
+}
+var applyDecs2203Impl;
+function applyDecs2203(e, t, r) {
+  return (applyDecs2203Impl = applyDecs2203Impl || applyDecs2203Factory())(e, t, r);
+}
+module.exports = applyDecs2203, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2203R.js b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2203R.js
new file mode 100644
index 0000000..1be7f5e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2203R.js
@@ -0,0 +1,191 @@
+var _typeof = require("./typeof.js")["default"];
+var setFunctionName = require("./setFunctionName.js");
+var toPropertyKey = require("./toPropertyKey.js");
+function applyDecs2203RFactory() {
+  function createAddInitializerMethod(e, t) {
+    return function (r) {
+      !function (e) {
+        if (e.v) throw Error("attempted to call addInitializer after decoration was finished");
+      }(t), assertCallable(r, "An initializer"), e.push(r);
+    };
+  }
+  function memberDec(e, t, r, n, a, i, o, s) {
+    var c;
+    switch (a) {
+      case 1:
+        c = "accessor";
+        break;
+      case 2:
+        c = "method";
+        break;
+      case 3:
+        c = "getter";
+        break;
+      case 4:
+        c = "setter";
+        break;
+      default:
+        c = "field";
+    }
+    var l,
+      u,
+      f = {
+        kind: c,
+        name: o ? "#" + t : toPropertyKey(t),
+        "static": i,
+        "private": o
+      },
+      p = {
+        v: !1
+      };
+    0 !== a && (f.addInitializer = createAddInitializerMethod(n, p)), 0 === a ? o ? (l = r.get, u = r.set) : (l = function l() {
+      return this[t];
+    }, u = function u(e) {
+      this[t] = e;
+    }) : 2 === a ? l = function l() {
+      return r.value;
+    } : (1 !== a && 3 !== a || (l = function l() {
+      return r.get.call(this);
+    }), 1 !== a && 4 !== a || (u = function u(e) {
+      r.set.call(this, e);
+    })), f.access = l && u ? {
+      get: l,
+      set: u
+    } : l ? {
+      get: l
+    } : {
+      set: u
+    };
+    try {
+      return e(s, f);
+    } finally {
+      p.v = !0;
+    }
+  }
+  function assertCallable(e, t) {
+    if ("function" != typeof e) throw new TypeError(t + " must be a function");
+  }
+  function assertValidReturnValue(e, t) {
+    var r = _typeof(t);
+    if (1 === e) {
+      if ("object" !== r || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
+      void 0 !== t.get && assertCallable(t.get, "accessor.get"), void 0 !== t.set && assertCallable(t.set, "accessor.set"), void 0 !== t.init && assertCallable(t.init, "accessor.init");
+    } else if ("function" !== r) throw new TypeError((0 === e ? "field" : 10 === e ? "class" : "method") + " decorators must return a function or void 0");
+  }
+  function applyMemberDec(e, t, r, n, a, i, o, s) {
+    var c,
+      l,
+      u,
+      f,
+      p,
+      d,
+      h,
+      v = r[0];
+    if (o ? (0 === a || 1 === a ? (c = {
+      get: r[3],
+      set: r[4]
+    }, u = "get") : 3 === a ? (c = {
+      get: r[3]
+    }, u = "get") : 4 === a ? (c = {
+      set: r[3]
+    }, u = "set") : c = {
+      value: r[3]
+    }, 0 !== a && (1 === a && setFunctionName(r[4], "#" + n, "set"), setFunctionName(r[3], "#" + n, u))) : 0 !== a && (c = Object.getOwnPropertyDescriptor(t, n)), 1 === a ? f = {
+      get: c.get,
+      set: c.set
+    } : 2 === a ? f = c.value : 3 === a ? f = c.get : 4 === a && (f = c.set), "function" == typeof v) void 0 !== (p = memberDec(v, n, c, s, a, i, o, f)) && (assertValidReturnValue(a, p), 0 === a ? l = p : 1 === a ? (l = p.init, d = p.get || f.get, h = p.set || f.set, f = {
+      get: d,
+      set: h
+    }) : f = p);else for (var g = v.length - 1; g >= 0; g--) {
+      var y;
+      void 0 !== (p = memberDec(v[g], n, c, s, a, i, o, f)) && (assertValidReturnValue(a, p), 0 === a ? y = p : 1 === a ? (y = p.init, d = p.get || f.get, h = p.set || f.set, f = {
+        get: d,
+        set: h
+      }) : f = p, void 0 !== y && (void 0 === l ? l = y : "function" == typeof l ? l = [l, y] : l.push(y)));
+    }
+    if (0 === a || 1 === a) {
+      if (void 0 === l) l = function l(e, t) {
+        return t;
+      };else if ("function" != typeof l) {
+        var m = l;
+        l = function l(e, t) {
+          for (var r = t, n = 0; n < m.length; n++) r = m[n].call(e, r);
+          return r;
+        };
+      } else {
+        var b = l;
+        l = function l(e, t) {
+          return b.call(e, t);
+        };
+      }
+      e.push(l);
+    }
+    0 !== a && (1 === a ? (c.get = f.get, c.set = f.set) : 2 === a ? c.value = f : 3 === a ? c.get = f : 4 === a && (c.set = f), o ? 1 === a ? (e.push(function (e, t) {
+      return f.get.call(e, t);
+    }), e.push(function (e, t) {
+      return f.set.call(e, t);
+    })) : 2 === a ? e.push(f) : e.push(function (e, t) {
+      return f.call(e, t);
+    }) : Object.defineProperty(t, n, c));
+  }
+  function applyMemberDecs(e, t) {
+    for (var r, n, a = [], i = new Map(), o = new Map(), s = 0; s < t.length; s++) {
+      var c = t[s];
+      if (Array.isArray(c)) {
+        var l,
+          u,
+          f = c[1],
+          p = c[2],
+          d = c.length > 3,
+          h = f >= 5;
+        if (h ? (l = e, 0 != (f -= 5) && (u = n = n || [])) : (l = e.prototype, 0 !== f && (u = r = r || [])), 0 !== f && !d) {
+          var v = h ? o : i,
+            g = v.get(p) || 0;
+          if (!0 === g || 3 === g && 4 !== f || 4 === g && 3 !== f) throw Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + p);
+          !g && f > 2 ? v.set(p, f) : v.set(p, !0);
+        }
+        applyMemberDec(a, l, c, p, f, h, d, u);
+      }
+    }
+    return pushInitializers(a, r), pushInitializers(a, n), a;
+  }
+  function pushInitializers(e, t) {
+    t && e.push(function (e) {
+      for (var r = 0; r < t.length; r++) t[r].call(e);
+      return e;
+    });
+  }
+  return function (e, t, r) {
+    return {
+      e: applyMemberDecs(e, t),
+      get c() {
+        return function (e, t) {
+          if (t.length > 0) {
+            for (var r = [], n = e, a = e.name, i = t.length - 1; i >= 0; i--) {
+              var o = {
+                v: !1
+              };
+              try {
+                var s = t[i](n, {
+                  kind: "class",
+                  name: a,
+                  addInitializer: createAddInitializerMethod(r, o)
+                });
+              } finally {
+                o.v = !0;
+              }
+              void 0 !== s && (assertValidReturnValue(10, s), n = s);
+            }
+            return [n, function () {
+              for (var e = 0; e < r.length; e++) r[e].call(n);
+            }];
+          }
+        }(e, r);
+      }
+    };
+  };
+}
+function applyDecs2203R(e, t, r) {
+  return (module.exports = applyDecs2203R = applyDecs2203RFactory(), module.exports.__esModule = true, module.exports["default"] = module.exports)(e, t, r);
+}
+module.exports = applyDecs2203R, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2301.js b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2301.js
new file mode 100644
index 0000000..577eee8
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2301.js
@@ -0,0 +1,222 @@
+var _typeof = require("./typeof.js")["default"];
+var checkInRHS = require("./checkInRHS.js");
+var setFunctionName = require("./setFunctionName.js");
+var toPropertyKey = require("./toPropertyKey.js");
+function applyDecs2301Factory() {
+  function createAddInitializerMethod(e, t) {
+    return function (r) {
+      !function (e) {
+        if (e.v) throw Error("attempted to call addInitializer after decoration was finished");
+      }(t), assertCallable(r, "An initializer"), e.push(r);
+    };
+  }
+  function assertInstanceIfPrivate(e, t) {
+    if (!e(t)) throw new TypeError("Attempted to access private element on non-instance");
+  }
+  function memberDec(e, t, r, n, a, i, s, o, c) {
+    var u;
+    switch (a) {
+      case 1:
+        u = "accessor";
+        break;
+      case 2:
+        u = "method";
+        break;
+      case 3:
+        u = "getter";
+        break;
+      case 4:
+        u = "setter";
+        break;
+      default:
+        u = "field";
+    }
+    var l,
+      f,
+      p = {
+        kind: u,
+        name: s ? "#" + t : toPropertyKey(t),
+        "static": i,
+        "private": s
+      },
+      d = {
+        v: !1
+      };
+    if (0 !== a && (p.addInitializer = createAddInitializerMethod(n, d)), s || 0 !== a && 2 !== a) {
+      if (2 === a) l = function l(e) {
+        return assertInstanceIfPrivate(c, e), r.value;
+      };else {
+        var h = 0 === a || 1 === a;
+        (h || 3 === a) && (l = s ? function (e) {
+          return assertInstanceIfPrivate(c, e), r.get.call(e);
+        } : function (e) {
+          return r.get.call(e);
+        }), (h || 4 === a) && (f = s ? function (e, t) {
+          assertInstanceIfPrivate(c, e), r.set.call(e, t);
+        } : function (e, t) {
+          r.set.call(e, t);
+        });
+      }
+    } else l = function l(e) {
+      return e[t];
+    }, 0 === a && (f = function f(e, r) {
+      e[t] = r;
+    });
+    var v = s ? c.bind() : function (e) {
+      return t in e;
+    };
+    p.access = l && f ? {
+      get: l,
+      set: f,
+      has: v
+    } : l ? {
+      get: l,
+      has: v
+    } : {
+      set: f,
+      has: v
+    };
+    try {
+      return e(o, p);
+    } finally {
+      d.v = !0;
+    }
+  }
+  function assertCallable(e, t) {
+    if ("function" != typeof e) throw new TypeError(t + " must be a function");
+  }
+  function assertValidReturnValue(e, t) {
+    var r = _typeof(t);
+    if (1 === e) {
+      if ("object" !== r || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
+      void 0 !== t.get && assertCallable(t.get, "accessor.get"), void 0 !== t.set && assertCallable(t.set, "accessor.set"), void 0 !== t.init && assertCallable(t.init, "accessor.init");
+    } else if ("function" !== r) throw new TypeError((0 === e ? "field" : 10 === e ? "class" : "method") + " decorators must return a function or void 0");
+  }
+  function curryThis2(e) {
+    return function (t) {
+      e(this, t);
+    };
+  }
+  function applyMemberDec(e, t, r, n, a, i, s, o, c) {
+    var u,
+      l,
+      f,
+      p,
+      d,
+      h,
+      v,
+      y,
+      g = r[0];
+    if (s ? (0 === a || 1 === a ? (u = {
+      get: (d = r[3], function () {
+        return d(this);
+      }),
+      set: curryThis2(r[4])
+    }, f = "get") : 3 === a ? (u = {
+      get: r[3]
+    }, f = "get") : 4 === a ? (u = {
+      set: r[3]
+    }, f = "set") : u = {
+      value: r[3]
+    }, 0 !== a && (1 === a && setFunctionName(u.set, "#" + n, "set"), setFunctionName(u[f || "value"], "#" + n, f))) : 0 !== a && (u = Object.getOwnPropertyDescriptor(t, n)), 1 === a ? p = {
+      get: u.get,
+      set: u.set
+    } : 2 === a ? p = u.value : 3 === a ? p = u.get : 4 === a && (p = u.set), "function" == typeof g) void 0 !== (h = memberDec(g, n, u, o, a, i, s, p, c)) && (assertValidReturnValue(a, h), 0 === a ? l = h : 1 === a ? (l = h.init, v = h.get || p.get, y = h.set || p.set, p = {
+      get: v,
+      set: y
+    }) : p = h);else for (var m = g.length - 1; m >= 0; m--) {
+      var b;
+      void 0 !== (h = memberDec(g[m], n, u, o, a, i, s, p, c)) && (assertValidReturnValue(a, h), 0 === a ? b = h : 1 === a ? (b = h.init, v = h.get || p.get, y = h.set || p.set, p = {
+        get: v,
+        set: y
+      }) : p = h, void 0 !== b && (void 0 === l ? l = b : "function" == typeof l ? l = [l, b] : l.push(b)));
+    }
+    if (0 === a || 1 === a) {
+      if (void 0 === l) l = function l(e, t) {
+        return t;
+      };else if ("function" != typeof l) {
+        var I = l;
+        l = function l(e, t) {
+          for (var r = t, n = 0; n < I.length; n++) r = I[n].call(e, r);
+          return r;
+        };
+      } else {
+        var w = l;
+        l = function l(e, t) {
+          return w.call(e, t);
+        };
+      }
+      e.push(l);
+    }
+    0 !== a && (1 === a ? (u.get = p.get, u.set = p.set) : 2 === a ? u.value = p : 3 === a ? u.get = p : 4 === a && (u.set = p), s ? 1 === a ? (e.push(function (e, t) {
+      return p.get.call(e, t);
+    }), e.push(function (e, t) {
+      return p.set.call(e, t);
+    })) : 2 === a ? e.push(p) : e.push(function (e, t) {
+      return p.call(e, t);
+    }) : Object.defineProperty(t, n, u));
+  }
+  function applyMemberDecs(e, t, r) {
+    for (var n, a, i, s = [], o = new Map(), c = new Map(), u = 0; u < t.length; u++) {
+      var l = t[u];
+      if (Array.isArray(l)) {
+        var f,
+          p,
+          d = l[1],
+          h = l[2],
+          v = l.length > 3,
+          y = d >= 5,
+          g = r;
+        if (y ? (f = e, 0 != (d -= 5) && (p = a = a || []), v && !i && (i = function i(t) {
+          return checkInRHS(t) === e;
+        }), g = i) : (f = e.prototype, 0 !== d && (p = n = n || [])), 0 !== d && !v) {
+          var m = y ? c : o,
+            b = m.get(h) || 0;
+          if (!0 === b || 3 === b && 4 !== d || 4 === b && 3 !== d) throw Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + h);
+          !b && d > 2 ? m.set(h, d) : m.set(h, !0);
+        }
+        applyMemberDec(s, f, l, h, d, y, v, p, g);
+      }
+    }
+    return pushInitializers(s, n), pushInitializers(s, a), s;
+  }
+  function pushInitializers(e, t) {
+    t && e.push(function (e) {
+      for (var r = 0; r < t.length; r++) t[r].call(e);
+      return e;
+    });
+  }
+  return function (e, t, r, n) {
+    return {
+      e: applyMemberDecs(e, t, n),
+      get c() {
+        return function (e, t) {
+          if (t.length > 0) {
+            for (var r = [], n = e, a = e.name, i = t.length - 1; i >= 0; i--) {
+              var s = {
+                v: !1
+              };
+              try {
+                var o = t[i](n, {
+                  kind: "class",
+                  name: a,
+                  addInitializer: createAddInitializerMethod(r, s)
+                });
+              } finally {
+                s.v = !0;
+              }
+              void 0 !== o && (assertValidReturnValue(10, o), n = o);
+            }
+            return [n, function () {
+              for (var e = 0; e < r.length; e++) r[e].call(n);
+            }];
+          }
+        }(e, r);
+      }
+    };
+  };
+}
+function applyDecs2301(e, t, r, n) {
+  return (module.exports = applyDecs2301 = applyDecs2301Factory(), module.exports.__esModule = true, module.exports["default"] = module.exports)(e, t, r, n);
+}
+module.exports = applyDecs2301, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2305.js b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2305.js
new file mode 100644
index 0000000..744c352
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2305.js
@@ -0,0 +1,133 @@
+var _typeof = require("./typeof.js")["default"];
+var checkInRHS = require("./checkInRHS.js");
+var setFunctionName = require("./setFunctionName.js");
+var toPropertyKey = require("./toPropertyKey.js");
+function applyDecs2305(e, t, r, n, o, a) {
+  function i(e, t, r) {
+    return function (n, o) {
+      return r && r(n), e[t].call(n, o);
+    };
+  }
+  function c(e, t) {
+    for (var r = 0; r < e.length; r++) e[r].call(t);
+    return t;
+  }
+  function s(e, t, r, n) {
+    if ("function" != typeof e && (n || void 0 !== e)) throw new TypeError(t + " must " + (r || "be") + " a function" + (n ? "" : " or undefined"));
+    return e;
+  }
+  function applyDec(e, t, r, n, o, a, c, u, l, f, p, d, h) {
+    function m(e) {
+      if (!h(e)) throw new TypeError("Attempted to access private element on non-instance");
+    }
+    var y,
+      v = t[0],
+      g = t[3],
+      b = !u;
+    if (!b) {
+      r || Array.isArray(v) || (v = [v]);
+      var w = {},
+        S = [],
+        A = 3 === o ? "get" : 4 === o || d ? "set" : "value";
+      f ? (p || d ? w = {
+        get: setFunctionName(function () {
+          return g(this);
+        }, n, "get"),
+        set: function set(e) {
+          t[4](this, e);
+        }
+      } : w[A] = g, p || setFunctionName(w[A], n, 2 === o ? "" : A)) : p || (w = Object.getOwnPropertyDescriptor(e, n));
+    }
+    for (var P = e, j = v.length - 1; j >= 0; j -= r ? 2 : 1) {
+      var D = v[j],
+        E = r ? v[j - 1] : void 0,
+        I = {},
+        O = {
+          kind: ["field", "accessor", "method", "getter", "setter", "class"][o],
+          name: n,
+          metadata: a,
+          addInitializer: function (e, t) {
+            if (e.v) throw Error("attempted to call addInitializer after decoration was finished");
+            s(t, "An initializer", "be", !0), c.push(t);
+          }.bind(null, I)
+        };
+      try {
+        if (b) (y = s(D.call(E, P, O), "class decorators", "return")) && (P = y);else {
+          var k, F;
+          O["static"] = l, O["private"] = f, f ? 2 === o ? k = function k(e) {
+            return m(e), w.value;
+          } : (o < 4 && (k = i(w, "get", m)), 3 !== o && (F = i(w, "set", m))) : (k = function k(e) {
+            return e[n];
+          }, (o < 2 || 4 === o) && (F = function F(e, t) {
+            e[n] = t;
+          }));
+          var N = O.access = {
+            has: f ? h.bind() : function (e) {
+              return n in e;
+            }
+          };
+          if (k && (N.get = k), F && (N.set = F), P = D.call(E, d ? {
+            get: w.get,
+            set: w.set
+          } : w[A], O), d) {
+            if ("object" == _typeof(P) && P) (y = s(P.get, "accessor.get")) && (w.get = y), (y = s(P.set, "accessor.set")) && (w.set = y), (y = s(P.init, "accessor.init")) && S.push(y);else if (void 0 !== P) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
+          } else s(P, (p ? "field" : "method") + " decorators", "return") && (p ? S.push(P) : w[A] = P);
+        }
+      } finally {
+        I.v = !0;
+      }
+    }
+    return (p || d) && u.push(function (e, t) {
+      for (var r = S.length - 1; r >= 0; r--) t = S[r].call(e, t);
+      return t;
+    }), p || b || (f ? d ? u.push(i(w, "get"), i(w, "set")) : u.push(2 === o ? w[A] : i.call.bind(w[A])) : Object.defineProperty(e, n, w)), P;
+  }
+  function u(e, t) {
+    return Object.defineProperty(e, Symbol.metadata || Symbol["for"]("Symbol.metadata"), {
+      configurable: !0,
+      enumerable: !0,
+      value: t
+    });
+  }
+  if (arguments.length >= 6) var l = a[Symbol.metadata || Symbol["for"]("Symbol.metadata")];
+  var f = Object.create(null == l ? null : l),
+    p = function (e, t, r, n) {
+      var o,
+        a,
+        i = [],
+        s = function s(t) {
+          return checkInRHS(t) === e;
+        },
+        u = new Map();
+      function l(e) {
+        e && i.push(c.bind(null, e));
+      }
+      for (var f = 0; f < t.length; f++) {
+        var p = t[f];
+        if (Array.isArray(p)) {
+          var d = p[1],
+            h = p[2],
+            m = p.length > 3,
+            y = 16 & d,
+            v = !!(8 & d),
+            g = 0 == (d &= 7),
+            b = h + "/" + v;
+          if (!g && !m) {
+            var w = u.get(b);
+            if (!0 === w || 3 === w && 4 !== d || 4 === w && 3 !== d) throw Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + h);
+            u.set(b, !(d > 2) || d);
+          }
+          applyDec(v ? e : e.prototype, p, y, m ? "#" + h : toPropertyKey(h), d, n, v ? a = a || [] : o = o || [], i, v, m, g, 1 === d, v && m ? s : r);
+        }
+      }
+      return l(o), l(a), i;
+    }(e, t, o, f);
+  return r.length || u(e, f), {
+    e: p,
+    get c() {
+      var t = [];
+      return r.length && [u(applyDec(e, [r], n, e.name, 5, f, t), f), c.bind(null, t, e)];
+    }
+  };
+}
+module.exports = applyDecs2305, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2311.js b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2311.js
new file mode 100644
index 0000000..5c7ed77
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/applyDecs2311.js
@@ -0,0 +1,124 @@
+var _typeof = require("./typeof.js")["default"];
+var checkInRHS = require("./checkInRHS.js");
+var setFunctionName = require("./setFunctionName.js");
+var toPropertyKey = require("./toPropertyKey.js");
+function applyDecs2311(e, t, n, r, o, i) {
+  var a,
+    c,
+    u,
+    s,
+    f,
+    l,
+    p,
+    d = Symbol.metadata || Symbol["for"]("Symbol.metadata"),
+    m = Object.defineProperty,
+    h = Object.create,
+    y = [h(null), h(null)],
+    v = t.length;
+  function g(t, n, r) {
+    return function (o, i) {
+      n && (i = o, o = e);
+      for (var a = 0; a < t.length; a++) i = t[a].apply(o, r ? [i] : []);
+      return r ? i : o;
+    };
+  }
+  function b(e, t, n, r) {
+    if ("function" != typeof e && (r || void 0 !== e)) throw new TypeError(t + " must " + (n || "be") + " a function" + (r ? "" : " or undefined"));
+    return e;
+  }
+  function applyDec(e, t, n, r, o, i, u, s, f, l, p) {
+    function d(e) {
+      if (!p(e)) throw new TypeError("Attempted to access private element on non-instance");
+    }
+    var h = [].concat(t[0]),
+      v = t[3],
+      w = !u,
+      D = 1 === o,
+      S = 3 === o,
+      j = 4 === o,
+      E = 2 === o;
+    function I(t, n, r) {
+      return function (o, i) {
+        return n && (i = o, o = e), r && r(o), P[t].call(o, i);
+      };
+    }
+    if (!w) {
+      var P = {},
+        k = [],
+        F = S ? "get" : j || D ? "set" : "value";
+      if (f ? (l || D ? P = {
+        get: setFunctionName(function () {
+          return v(this);
+        }, r, "get"),
+        set: function set(e) {
+          t[4](this, e);
+        }
+      } : P[F] = v, l || setFunctionName(P[F], r, E ? "" : F)) : l || (P = Object.getOwnPropertyDescriptor(e, r)), !l && !f) {
+        if ((c = y[+s][r]) && 7 !== (c ^ o)) throw Error("Decorating two elements with the same name (" + P[F].name + ") is not supported yet");
+        y[+s][r] = o < 3 ? 1 : o;
+      }
+    }
+    for (var N = e, O = h.length - 1; O >= 0; O -= n ? 2 : 1) {
+      var T = b(h[O], "A decorator", "be", !0),
+        z = n ? h[O - 1] : void 0,
+        A = {},
+        H = {
+          kind: ["field", "accessor", "method", "getter", "setter", "class"][o],
+          name: r,
+          metadata: a,
+          addInitializer: function (e, t) {
+            if (e.v) throw new TypeError("attempted to call addInitializer after decoration was finished");
+            b(t, "An initializer", "be", !0), i.push(t);
+          }.bind(null, A)
+        };
+      if (w) c = T.call(z, N, H), A.v = 1, b(c, "class decorators", "return") && (N = c);else if (H["static"] = s, H["private"] = f, c = H.access = {
+        has: f ? p.bind() : function (e) {
+          return r in e;
+        }
+      }, j || (c.get = f ? E ? function (e) {
+        return d(e), P.value;
+      } : I("get", 0, d) : function (e) {
+        return e[r];
+      }), E || S || (c.set = f ? I("set", 0, d) : function (e, t) {
+        e[r] = t;
+      }), N = T.call(z, D ? {
+        get: P.get,
+        set: P.set
+      } : P[F], H), A.v = 1, D) {
+        if ("object" == _typeof(N) && N) (c = b(N.get, "accessor.get")) && (P.get = c), (c = b(N.set, "accessor.set")) && (P.set = c), (c = b(N.init, "accessor.init")) && k.unshift(c);else if (void 0 !== N) throw new TypeError("accessor decorators must return an object with get, set, or init properties or undefined");
+      } else b(N, (l ? "field" : "method") + " decorators", "return") && (l ? k.unshift(N) : P[F] = N);
+    }
+    return o < 2 && u.push(g(k, s, 1), g(i, s, 0)), l || w || (f ? D ? u.splice(-1, 0, I("get", s), I("set", s)) : u.push(E ? P[F] : b.call.bind(P[F])) : m(e, r, P)), N;
+  }
+  function w(e) {
+    return m(e, d, {
+      configurable: !0,
+      enumerable: !0,
+      value: a
+    });
+  }
+  return void 0 !== i && (a = i[d]), a = h(null == a ? null : a), f = [], l = function l(e) {
+    e && f.push(g(e));
+  }, p = function p(t, r) {
+    for (var i = 0; i < n.length; i++) {
+      var a = n[i],
+        c = a[1],
+        l = 7 & c;
+      if ((8 & c) == t && !l == r) {
+        var p = a[2],
+          d = !!a[3],
+          m = 16 & c;
+        applyDec(t ? e : e.prototype, a, m, d ? "#" + p : toPropertyKey(p), l, l < 2 ? [] : t ? s = s || [] : u = u || [], f, !!t, d, r, t && d ? function (t) {
+          return checkInRHS(t) === e;
+        } : o);
+      }
+    }
+  }, p(8, 0), p(0, 0), p(8, 1), p(0, 1), l(u), l(s), c = f, v || w(e), {
+    e: c,
+    get c() {
+      var n = [];
+      return v && [w(e = applyDec(e, [t], r, e.name, 5, n)), g(n, 1)];
+    }
+  };
+}
+module.exports = applyDecs2311, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/arrayLikeToArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/arrayLikeToArray.js
new file mode 100644
index 0000000..19787e3
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/arrayLikeToArray.js
@@ -0,0 +1,6 @@
+function _arrayLikeToArray(r, a) {
+  (null == a || a > r.length) && (a = r.length);
+  for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e];
+  return n;
+}
+module.exports = _arrayLikeToArray, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/arrayWithHoles.js b/mqtt-backend/node_modules/@babel/runtime/helpers/arrayWithHoles.js
new file mode 100644
index 0000000..78bdd93
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/arrayWithHoles.js
@@ -0,0 +1,4 @@
+function _arrayWithHoles(r) {
+  if (Array.isArray(r)) return r;
+}
+module.exports = _arrayWithHoles, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/arrayWithoutHoles.js b/mqtt-backend/node_modules/@babel/runtime/helpers/arrayWithoutHoles.js
new file mode 100644
index 0000000..42218f5
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/arrayWithoutHoles.js
@@ -0,0 +1,5 @@
+var arrayLikeToArray = require("./arrayLikeToArray.js");
+function _arrayWithoutHoles(r) {
+  if (Array.isArray(r)) return arrayLikeToArray(r);
+}
+module.exports = _arrayWithoutHoles, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/assertClassBrand.js b/mqtt-backend/node_modules/@babel/runtime/helpers/assertClassBrand.js
new file mode 100644
index 0000000..e63ed8f
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/assertClassBrand.js
@@ -0,0 +1,5 @@
+function _assertClassBrand(e, t, n) {
+  if ("function" == typeof e ? e === t : e.has(t)) return arguments.length < 3 ? t : n;
+  throw new TypeError("Private element is not present on this object");
+}
+module.exports = _assertClassBrand, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/assertThisInitialized.js b/mqtt-backend/node_modules/@babel/runtime/helpers/assertThisInitialized.js
new file mode 100644
index 0000000..02594fb
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/assertThisInitialized.js
@@ -0,0 +1,5 @@
+function _assertThisInitialized(e) {
+  if (void 0 === e) throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
+  return e;
+}
+module.exports = _assertThisInitialized, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/asyncGeneratorDelegate.js b/mqtt-backend/node_modules/@babel/runtime/helpers/asyncGeneratorDelegate.js
new file mode 100644
index 0000000..023568e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/asyncGeneratorDelegate.js
@@ -0,0 +1,24 @@
+var OverloadYield = require("./OverloadYield.js");
+function _asyncGeneratorDelegate(t) {
+  var e = {},
+    n = !1;
+  function pump(e, r) {
+    return n = !0, r = new Promise(function (n) {
+      n(t[e](r));
+    }), {
+      done: !1,
+      value: new OverloadYield(r, 1)
+    };
+  }
+  return e["undefined" != typeof Symbol && Symbol.iterator || "@@iterator"] = function () {
+    return this;
+  }, e.next = function (t) {
+    return n ? (n = !1, t) : pump("next", t);
+  }, "function" == typeof t["throw"] && (e["throw"] = function (t) {
+    if (n) throw n = !1, t;
+    return pump("throw", t);
+  }), "function" == typeof t["return"] && (e["return"] = function (t) {
+    return n ? (n = !1, t) : pump("return", t);
+  }), e;
+}
+module.exports = _asyncGeneratorDelegate, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/asyncIterator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/asyncIterator.js
new file mode 100644
index 0000000..9c0c95c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/asyncIterator.js
@@ -0,0 +1,45 @@
+function _asyncIterator(r) {
+  var n,
+    t,
+    o,
+    e = 2;
+  for ("undefined" != typeof Symbol && (t = Symbol.asyncIterator, o = Symbol.iterator); e--;) {
+    if (t && null != (n = r[t])) return n.call(r);
+    if (o && null != (n = r[o])) return new AsyncFromSyncIterator(n.call(r));
+    t = "@@asyncIterator", o = "@@iterator";
+  }
+  throw new TypeError("Object is not async iterable");
+}
+function AsyncFromSyncIterator(r) {
+  function AsyncFromSyncIteratorContinuation(r) {
+    if (Object(r) !== r) return Promise.reject(new TypeError(r + " is not an object."));
+    var n = r.done;
+    return Promise.resolve(r.value).then(function (r) {
+      return {
+        value: r,
+        done: n
+      };
+    });
+  }
+  return AsyncFromSyncIterator = function AsyncFromSyncIterator(r) {
+    this.s = r, this.n = r.next;
+  }, AsyncFromSyncIterator.prototype = {
+    s: null,
+    n: null,
+    next: function next() {
+      return AsyncFromSyncIteratorContinuation(this.n.apply(this.s, arguments));
+    },
+    "return": function _return(r) {
+      var n = this.s["return"];
+      return void 0 === n ? Promise.resolve({
+        value: r,
+        done: !0
+      }) : AsyncFromSyncIteratorContinuation(n.apply(this.s, arguments));
+    },
+    "throw": function _throw(r) {
+      var n = this.s["return"];
+      return void 0 === n ? Promise.reject(r) : AsyncFromSyncIteratorContinuation(n.apply(this.s, arguments));
+    }
+  }, new AsyncFromSyncIterator(r);
+}
+module.exports = _asyncIterator, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/asyncToGenerator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/asyncToGenerator.js
new file mode 100644
index 0000000..a080339
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/asyncToGenerator.js
@@ -0,0 +1,26 @@
+function asyncGeneratorStep(n, t, e, r, o, a, c) {
+  try {
+    var i = n[a](c),
+      u = i.value;
+  } catch (n) {
+    return void e(n);
+  }
+  i.done ? t(u) : Promise.resolve(u).then(r, o);
+}
+function _asyncToGenerator(n) {
+  return function () {
+    var t = this,
+      e = arguments;
+    return new Promise(function (r, o) {
+      var a = n.apply(t, e);
+      function _next(n) {
+        asyncGeneratorStep(a, r, o, _next, _throw, "next", n);
+      }
+      function _throw(n) {
+        asyncGeneratorStep(a, r, o, _next, _throw, "throw", n);
+      }
+      _next(void 0);
+    });
+  };
+}
+module.exports = _asyncToGenerator, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/awaitAsyncGenerator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/awaitAsyncGenerator.js
new file mode 100644
index 0000000..2d6fab9
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/awaitAsyncGenerator.js
@@ -0,0 +1,5 @@
+var OverloadYield = require("./OverloadYield.js");
+function _awaitAsyncGenerator(e) {
+  return new OverloadYield(e, 0);
+}
+module.exports = _awaitAsyncGenerator, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/callSuper.js b/mqtt-backend/node_modules/@babel/runtime/helpers/callSuper.js
new file mode 100644
index 0000000..38eaf7f
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/callSuper.js
@@ -0,0 +1,7 @@
+var getPrototypeOf = require("./getPrototypeOf.js");
+var isNativeReflectConstruct = require("./isNativeReflectConstruct.js");
+var possibleConstructorReturn = require("./possibleConstructorReturn.js");
+function _callSuper(t, o, e) {
+  return o = getPrototypeOf(o), possibleConstructorReturn(t, isNativeReflectConstruct() ? Reflect.construct(o, e || [], getPrototypeOf(t).constructor) : o.apply(t, e));
+}
+module.exports = _callSuper, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/checkInRHS.js b/mqtt-backend/node_modules/@babel/runtime/helpers/checkInRHS.js
new file mode 100644
index 0000000..4eea13d
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/checkInRHS.js
@@ -0,0 +1,6 @@
+var _typeof = require("./typeof.js")["default"];
+function _checkInRHS(e) {
+  if (Object(e) !== e) throw TypeError("right-hand side of 'in' should be an object, got " + (null !== e ? _typeof(e) : "null"));
+  return e;
+}
+module.exports = _checkInRHS, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/checkPrivateRedeclaration.js b/mqtt-backend/node_modules/@babel/runtime/helpers/checkPrivateRedeclaration.js
new file mode 100644
index 0000000..33ad54c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/checkPrivateRedeclaration.js
@@ -0,0 +1,4 @@
+function _checkPrivateRedeclaration(e, t) {
+  if (t.has(e)) throw new TypeError("Cannot initialize the same private elements twice on an object");
+}
+module.exports = _checkPrivateRedeclaration, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classApplyDescriptorDestructureSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classApplyDescriptorDestructureSet.js
new file mode 100644
index 0000000..9998b83
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classApplyDescriptorDestructureSet.js
@@ -0,0 +1,10 @@
+function _classApplyDescriptorDestructureSet(e, t) {
+  if (t.set) return "__destrObj" in t || (t.__destrObj = {
+    set value(r) {
+      t.set.call(e, r);
+    }
+  }), t.__destrObj;
+  if (!t.writable) throw new TypeError("attempted to set read only private field");
+  return t;
+}
+module.exports = _classApplyDescriptorDestructureSet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classApplyDescriptorGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classApplyDescriptorGet.js
new file mode 100644
index 0000000..ab62724
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classApplyDescriptorGet.js
@@ -0,0 +1,4 @@
+function _classApplyDescriptorGet(e, t) {
+  return t.get ? t.get.call(e) : t.value;
+}
+module.exports = _classApplyDescriptorGet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classApplyDescriptorSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classApplyDescriptorSet.js
new file mode 100644
index 0000000..0975f95
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classApplyDescriptorSet.js
@@ -0,0 +1,7 @@
+function _classApplyDescriptorSet(e, t, l) {
+  if (t.set) t.set.call(e, l);else {
+    if (!t.writable) throw new TypeError("attempted to set read only private field");
+    t.value = l;
+  }
+}
+module.exports = _classApplyDescriptorSet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classCallCheck.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classCallCheck.js
new file mode 100644
index 0000000..21b8390
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classCallCheck.js
@@ -0,0 +1,4 @@
+function _classCallCheck(a, n) {
+  if (!(a instanceof n)) throw new TypeError("Cannot call a class as a function");
+}
+module.exports = _classCallCheck, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classCheckPrivateStaticAccess.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classCheckPrivateStaticAccess.js
new file mode 100644
index 0000000..7520f74
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classCheckPrivateStaticAccess.js
@@ -0,0 +1,5 @@
+var assertClassBrand = require("./assertClassBrand.js");
+function _classCheckPrivateStaticAccess(s, a, r) {
+  return assertClassBrand(a, s, r);
+}
+module.exports = _classCheckPrivateStaticAccess, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classCheckPrivateStaticFieldDescriptor.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classCheckPrivateStaticFieldDescriptor.js
new file mode 100644
index 0000000..7f70395
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classCheckPrivateStaticFieldDescriptor.js
@@ -0,0 +1,4 @@
+function _classCheckPrivateStaticFieldDescriptor(t, e) {
+  if (void 0 === t) throw new TypeError("attempted to " + e + " private static field before its declaration");
+}
+module.exports = _classCheckPrivateStaticFieldDescriptor, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classExtractFieldDescriptor.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classExtractFieldDescriptor.js
new file mode 100644
index 0000000..be855be
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classExtractFieldDescriptor.js
@@ -0,0 +1,5 @@
+var classPrivateFieldGet2 = require("./classPrivateFieldGet2.js");
+function _classExtractFieldDescriptor(e, t) {
+  return classPrivateFieldGet2(t, e);
+}
+module.exports = _classExtractFieldDescriptor, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classNameTDZError.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classNameTDZError.js
new file mode 100644
index 0000000..8141ff8
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classNameTDZError.js
@@ -0,0 +1,4 @@
+function _classNameTDZError(e) {
+  throw new ReferenceError('Class "' + e + '" cannot be referenced in computed property keys.');
+}
+module.exports = _classNameTDZError, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldDestructureSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldDestructureSet.js
new file mode 100644
index 0000000..97c764d
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldDestructureSet.js
@@ -0,0 +1,7 @@
+var classApplyDescriptorDestructureSet = require("./classApplyDescriptorDestructureSet.js");
+var classPrivateFieldGet2 = require("./classPrivateFieldGet2.js");
+function _classPrivateFieldDestructureSet(e, t) {
+  var r = classPrivateFieldGet2(t, e);
+  return classApplyDescriptorDestructureSet(e, r);
+}
+module.exports = _classPrivateFieldDestructureSet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldGet.js
new file mode 100644
index 0000000..bbee142
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldGet.js
@@ -0,0 +1,7 @@
+var classApplyDescriptorGet = require("./classApplyDescriptorGet.js");
+var classPrivateFieldGet2 = require("./classPrivateFieldGet2.js");
+function _classPrivateFieldGet(e, t) {
+  var r = classPrivateFieldGet2(t, e);
+  return classApplyDescriptorGet(e, r);
+}
+module.exports = _classPrivateFieldGet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldGet2.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldGet2.js
new file mode 100644
index 0000000..d4c271c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldGet2.js
@@ -0,0 +1,5 @@
+var assertClassBrand = require("./assertClassBrand.js");
+function _classPrivateFieldGet2(s, a) {
+  return s.get(assertClassBrand(s, a));
+}
+module.exports = _classPrivateFieldGet2, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldInitSpec.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldInitSpec.js
new file mode 100644
index 0000000..a290c19
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldInitSpec.js
@@ -0,0 +1,5 @@
+var checkPrivateRedeclaration = require("./checkPrivateRedeclaration.js");
+function _classPrivateFieldInitSpec(e, t, a) {
+  checkPrivateRedeclaration(e, t), t.set(e, a);
+}
+module.exports = _classPrivateFieldInitSpec, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js
new file mode 100644
index 0000000..f9e46f2
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldLooseBase.js
@@ -0,0 +1,5 @@
+function _classPrivateFieldBase(e, t) {
+  if (!{}.hasOwnProperty.call(e, t)) throw new TypeError("attempted to use private field on non-instance");
+  return e;
+}
+module.exports = _classPrivateFieldBase, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldLooseKey.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldLooseKey.js
new file mode 100644
index 0000000..5dc687f
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldLooseKey.js
@@ -0,0 +1,5 @@
+var id = 0;
+function _classPrivateFieldKey(e) {
+  return "__private_" + id++ + "_" + e;
+}
+module.exports = _classPrivateFieldKey, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldSet.js
new file mode 100644
index 0000000..f3746e7
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldSet.js
@@ -0,0 +1,7 @@
+var classApplyDescriptorSet = require("./classApplyDescriptorSet.js");
+var classPrivateFieldGet2 = require("./classPrivateFieldGet2.js");
+function _classPrivateFieldSet(e, t, r) {
+  var s = classPrivateFieldGet2(t, e);
+  return classApplyDescriptorSet(e, s, r), r;
+}
+module.exports = _classPrivateFieldSet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldSet2.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldSet2.js
new file mode 100644
index 0000000..25c60ca
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateFieldSet2.js
@@ -0,0 +1,5 @@
+var assertClassBrand = require("./assertClassBrand.js");
+function _classPrivateFieldSet2(s, a, r) {
+  return s.set(assertClassBrand(s, a), r), r;
+}
+module.exports = _classPrivateFieldSet2, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateGetter.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateGetter.js
new file mode 100644
index 0000000..1b3cf30
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateGetter.js
@@ -0,0 +1,5 @@
+var assertClassBrand = require("./assertClassBrand.js");
+function _classPrivateGetter(s, r, a) {
+  return a(assertClassBrand(s, r));
+}
+module.exports = _classPrivateGetter, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateMethodGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateMethodGet.js
new file mode 100644
index 0000000..e4af387
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateMethodGet.js
@@ -0,0 +1,5 @@
+var assertClassBrand = require("./assertClassBrand.js");
+function _classPrivateMethodGet(s, a, r) {
+  return assertClassBrand(a, s), r;
+}
+module.exports = _classPrivateMethodGet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateMethodInitSpec.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateMethodInitSpec.js
new file mode 100644
index 0000000..821c8ed
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateMethodInitSpec.js
@@ -0,0 +1,5 @@
+var checkPrivateRedeclaration = require("./checkPrivateRedeclaration.js");
+function _classPrivateMethodInitSpec(e, a) {
+  checkPrivateRedeclaration(e, a), a.add(e);
+}
+module.exports = _classPrivateMethodInitSpec, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateMethodSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateMethodSet.js
new file mode 100644
index 0000000..a44fd78
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateMethodSet.js
@@ -0,0 +1,4 @@
+function _classPrivateMethodSet() {
+  throw new TypeError("attempted to reassign private method");
+}
+module.exports = _classPrivateMethodSet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateSetter.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateSetter.js
new file mode 100644
index 0000000..494f81f
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classPrivateSetter.js
@@ -0,0 +1,5 @@
+var assertClassBrand = require("./assertClassBrand.js");
+function _classPrivateSetter(s, r, a, t) {
+  return r(assertClassBrand(s, a), t), t;
+}
+module.exports = _classPrivateSetter, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateFieldDestructureSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateFieldDestructureSet.js
new file mode 100644
index 0000000..2bb6e8b
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateFieldDestructureSet.js
@@ -0,0 +1,7 @@
+var classApplyDescriptorDestructureSet = require("./classApplyDescriptorDestructureSet.js");
+var assertClassBrand = require("./assertClassBrand.js");
+var classCheckPrivateStaticFieldDescriptor = require("./classCheckPrivateStaticFieldDescriptor.js");
+function _classStaticPrivateFieldDestructureSet(t, r, s) {
+  return assertClassBrand(r, t), classCheckPrivateStaticFieldDescriptor(s, "set"), classApplyDescriptorDestructureSet(t, s);
+}
+module.exports = _classStaticPrivateFieldDestructureSet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateFieldSpecGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateFieldSpecGet.js
new file mode 100644
index 0000000..eb2365f
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateFieldSpecGet.js
@@ -0,0 +1,7 @@
+var classApplyDescriptorGet = require("./classApplyDescriptorGet.js");
+var assertClassBrand = require("./assertClassBrand.js");
+var classCheckPrivateStaticFieldDescriptor = require("./classCheckPrivateStaticFieldDescriptor.js");
+function _classStaticPrivateFieldSpecGet(t, s, r) {
+  return assertClassBrand(s, t), classCheckPrivateStaticFieldDescriptor(r, "get"), classApplyDescriptorGet(t, r);
+}
+module.exports = _classStaticPrivateFieldSpecGet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateFieldSpecSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateFieldSpecSet.js
new file mode 100644
index 0000000..7783cd8
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateFieldSpecSet.js
@@ -0,0 +1,7 @@
+var classApplyDescriptorSet = require("./classApplyDescriptorSet.js");
+var assertClassBrand = require("./assertClassBrand.js");
+var classCheckPrivateStaticFieldDescriptor = require("./classCheckPrivateStaticFieldDescriptor.js");
+function _classStaticPrivateFieldSpecSet(s, t, r, e) {
+  return assertClassBrand(t, s), classCheckPrivateStaticFieldDescriptor(r, "set"), classApplyDescriptorSet(s, r, e), e;
+}
+module.exports = _classStaticPrivateFieldSpecSet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateMethodGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateMethodGet.js
new file mode 100644
index 0000000..c895be5
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateMethodGet.js
@@ -0,0 +1,5 @@
+var assertClassBrand = require("./assertClassBrand.js");
+function _classStaticPrivateMethodGet(s, a, t) {
+  return assertClassBrand(a, s), t;
+}
+module.exports = _classStaticPrivateMethodGet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateMethodSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateMethodSet.js
new file mode 100644
index 0000000..72560e6
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/classStaticPrivateMethodSet.js
@@ -0,0 +1,4 @@
+function _classStaticPrivateMethodSet() {
+  throw new TypeError("attempted to set read only static private field");
+}
+module.exports = _classStaticPrivateMethodSet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/construct.js b/mqtt-backend/node_modules/@babel/runtime/helpers/construct.js
new file mode 100644
index 0000000..aee8e70
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/construct.js
@@ -0,0 +1,10 @@
+var isNativeReflectConstruct = require("./isNativeReflectConstruct.js");
+var setPrototypeOf = require("./setPrototypeOf.js");
+function _construct(t, e, r) {
+  if (isNativeReflectConstruct()) return Reflect.construct.apply(null, arguments);
+  var o = [null];
+  o.push.apply(o, e);
+  var p = new (t.bind.apply(t, o))();
+  return r && setPrototypeOf(p, r.prototype), p;
+}
+module.exports = _construct, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/createClass.js b/mqtt-backend/node_modules/@babel/runtime/helpers/createClass.js
new file mode 100644
index 0000000..8757f9e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/createClass.js
@@ -0,0 +1,13 @@
+var toPropertyKey = require("./toPropertyKey.js");
+function _defineProperties(e, r) {
+  for (var t = 0; t < r.length; t++) {
+    var o = r[t];
+    o.enumerable = o.enumerable || !1, o.configurable = !0, "value" in o && (o.writable = !0), Object.defineProperty(e, toPropertyKey(o.key), o);
+  }
+}
+function _createClass(e, r, t) {
+  return r && _defineProperties(e.prototype, r), t && _defineProperties(e, t), Object.defineProperty(e, "prototype", {
+    writable: !1
+  }), e;
+}
+module.exports = _createClass, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/createForOfIteratorHelper.js b/mqtt-backend/node_modules/@babel/runtime/helpers/createForOfIteratorHelper.js
new file mode 100644
index 0000000..2778307
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/createForOfIteratorHelper.js
@@ -0,0 +1,50 @@
+var unsupportedIterableToArray = require("./unsupportedIterableToArray.js");
+function _createForOfIteratorHelper(r, e) {
+  var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
+  if (!t) {
+    if (Array.isArray(r) || (t = unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) {
+      t && (r = t);
+      var _n = 0,
+        F = function F() {};
+      return {
+        s: F,
+        n: function n() {
+          return _n >= r.length ? {
+            done: !0
+          } : {
+            done: !1,
+            value: r[_n++]
+          };
+        },
+        e: function e(r) {
+          throw r;
+        },
+        f: F
+      };
+    }
+    throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+  }
+  var o,
+    a = !0,
+    u = !1;
+  return {
+    s: function s() {
+      t = t.call(r);
+    },
+    n: function n() {
+      var r = t.next();
+      return a = r.done, r;
+    },
+    e: function e(r) {
+      u = !0, o = r;
+    },
+    f: function f() {
+      try {
+        a || null == t["return"] || t["return"]();
+      } finally {
+        if (u) throw o;
+      }
+    }
+  };
+}
+module.exports = _createForOfIteratorHelper, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/createForOfIteratorHelperLoose.js b/mqtt-backend/node_modules/@babel/runtime/helpers/createForOfIteratorHelperLoose.js
new file mode 100644
index 0000000..bc81b1c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/createForOfIteratorHelperLoose.js
@@ -0,0 +1,19 @@
+var unsupportedIterableToArray = require("./unsupportedIterableToArray.js");
+function _createForOfIteratorHelperLoose(r, e) {
+  var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
+  if (t) return (t = t.call(r)).next.bind(t);
+  if (Array.isArray(r) || (t = unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) {
+    t && (r = t);
+    var o = 0;
+    return function () {
+      return o >= r.length ? {
+        done: !0
+      } : {
+        done: !1,
+        value: r[o++]
+      };
+    };
+  }
+  throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+}
+module.exports = _createForOfIteratorHelperLoose, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/createSuper.js b/mqtt-backend/node_modules/@babel/runtime/helpers/createSuper.js
new file mode 100644
index 0000000..b1869e6
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/createSuper.js
@@ -0,0 +1,16 @@
+var getPrototypeOf = require("./getPrototypeOf.js");
+var isNativeReflectConstruct = require("./isNativeReflectConstruct.js");
+var possibleConstructorReturn = require("./possibleConstructorReturn.js");
+function _createSuper(t) {
+  var r = isNativeReflectConstruct();
+  return function () {
+    var e,
+      o = getPrototypeOf(t);
+    if (r) {
+      var s = getPrototypeOf(this).constructor;
+      e = Reflect.construct(o, arguments, s);
+    } else e = o.apply(this, arguments);
+    return possibleConstructorReturn(this, e);
+  };
+}
+module.exports = _createSuper, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/decorate.js b/mqtt-backend/node_modules/@babel/runtime/helpers/decorate.js
new file mode 100644
index 0000000..bc22acf
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/decorate.js
@@ -0,0 +1,250 @@
+var toArray = require("./toArray.js");
+var toPropertyKey = require("./toPropertyKey.js");
+function _decorate(e, r, t, i) {
+  var o = _getDecoratorsApi();
+  if (i) for (var n = 0; n < i.length; n++) o = i[n](o);
+  var s = r(function (e) {
+      o.initializeInstanceElements(e, a.elements);
+    }, t),
+    a = o.decorateClass(_coalesceClassElements(s.d.map(_createElementDescriptor)), e);
+  return o.initializeClassElements(s.F, a.elements), o.runClassFinishers(s.F, a.finishers);
+}
+function _getDecoratorsApi() {
+  _getDecoratorsApi = function _getDecoratorsApi() {
+    return e;
+  };
+  var e = {
+    elementsDefinitionOrder: [["method"], ["field"]],
+    initializeInstanceElements: function initializeInstanceElements(e, r) {
+      ["method", "field"].forEach(function (t) {
+        r.forEach(function (r) {
+          r.kind === t && "own" === r.placement && this.defineClassElement(e, r);
+        }, this);
+      }, this);
+    },
+    initializeClassElements: function initializeClassElements(e, r) {
+      var t = e.prototype;
+      ["method", "field"].forEach(function (i) {
+        r.forEach(function (r) {
+          var o = r.placement;
+          if (r.kind === i && ("static" === o || "prototype" === o)) {
+            var n = "static" === o ? e : t;
+            this.defineClassElement(n, r);
+          }
+        }, this);
+      }, this);
+    },
+    defineClassElement: function defineClassElement(e, r) {
+      var t = r.descriptor;
+      if ("field" === r.kind) {
+        var i = r.initializer;
+        t = {
+          enumerable: t.enumerable,
+          writable: t.writable,
+          configurable: t.configurable,
+          value: void 0 === i ? void 0 : i.call(e)
+        };
+      }
+      Object.defineProperty(e, r.key, t);
+    },
+    decorateClass: function decorateClass(e, r) {
+      var t = [],
+        i = [],
+        o = {
+          "static": [],
+          prototype: [],
+          own: []
+        };
+      if (e.forEach(function (e) {
+        this.addElementPlacement(e, o);
+      }, this), e.forEach(function (e) {
+        if (!_hasDecorators(e)) return t.push(e);
+        var r = this.decorateElement(e, o);
+        t.push(r.element), t.push.apply(t, r.extras), i.push.apply(i, r.finishers);
+      }, this), !r) return {
+        elements: t,
+        finishers: i
+      };
+      var n = this.decorateConstructor(t, r);
+      return i.push.apply(i, n.finishers), n.finishers = i, n;
+    },
+    addElementPlacement: function addElementPlacement(e, r, t) {
+      var i = r[e.placement];
+      if (!t && -1 !== i.indexOf(e.key)) throw new TypeError("Duplicated element (" + e.key + ")");
+      i.push(e.key);
+    },
+    decorateElement: function decorateElement(e, r) {
+      for (var t = [], i = [], o = e.decorators, n = o.length - 1; n >= 0; n--) {
+        var s = r[e.placement];
+        s.splice(s.indexOf(e.key), 1);
+        var a = this.fromElementDescriptor(e),
+          l = this.toElementFinisherExtras((0, o[n])(a) || a);
+        e = l.element, this.addElementPlacement(e, r), l.finisher && i.push(l.finisher);
+        var c = l.extras;
+        if (c) {
+          for (var p = 0; p < c.length; p++) this.addElementPlacement(c[p], r);
+          t.push.apply(t, c);
+        }
+      }
+      return {
+        element: e,
+        finishers: i,
+        extras: t
+      };
+    },
+    decorateConstructor: function decorateConstructor(e, r) {
+      for (var t = [], i = r.length - 1; i >= 0; i--) {
+        var o = this.fromClassDescriptor(e),
+          n = this.toClassDescriptor((0, r[i])(o) || o);
+        if (void 0 !== n.finisher && t.push(n.finisher), void 0 !== n.elements) {
+          e = n.elements;
+          for (var s = 0; s < e.length - 1; s++) for (var a = s + 1; a < e.length; a++) if (e[s].key === e[a].key && e[s].placement === e[a].placement) throw new TypeError("Duplicated element (" + e[s].key + ")");
+        }
+      }
+      return {
+        elements: e,
+        finishers: t
+      };
+    },
+    fromElementDescriptor: function fromElementDescriptor(e) {
+      var r = {
+        kind: e.kind,
+        key: e.key,
+        placement: e.placement,
+        descriptor: e.descriptor
+      };
+      return Object.defineProperty(r, Symbol.toStringTag, {
+        value: "Descriptor",
+        configurable: !0
+      }), "field" === e.kind && (r.initializer = e.initializer), r;
+    },
+    toElementDescriptors: function toElementDescriptors(e) {
+      if (void 0 !== e) return toArray(e).map(function (e) {
+        var r = this.toElementDescriptor(e);
+        return this.disallowProperty(e, "finisher", "An element descriptor"), this.disallowProperty(e, "extras", "An element descriptor"), r;
+      }, this);
+    },
+    toElementDescriptor: function toElementDescriptor(e) {
+      var r = e.kind + "";
+      if ("method" !== r && "field" !== r) throw new TypeError('An element descriptor\'s .kind property must be either "method" or "field", but a decorator created an element descriptor with .kind "' + r + '"');
+      var t = toPropertyKey(e.key),
+        i = e.placement + "";
+      if ("static" !== i && "prototype" !== i && "own" !== i) throw new TypeError('An element descriptor\'s .placement property must be one of "static", "prototype" or "own", but a decorator created an element descriptor with .placement "' + i + '"');
+      var o = e.descriptor;
+      this.disallowProperty(e, "elements", "An element descriptor");
+      var n = {
+        kind: r,
+        key: t,
+        placement: i,
+        descriptor: Object.assign({}, o)
+      };
+      return "field" !== r ? this.disallowProperty(e, "initializer", "A method descriptor") : (this.disallowProperty(o, "get", "The property descriptor of a field descriptor"), this.disallowProperty(o, "set", "The property descriptor of a field descriptor"), this.disallowProperty(o, "value", "The property descriptor of a field descriptor"), n.initializer = e.initializer), n;
+    },
+    toElementFinisherExtras: function toElementFinisherExtras(e) {
+      return {
+        element: this.toElementDescriptor(e),
+        finisher: _optionalCallableProperty(e, "finisher"),
+        extras: this.toElementDescriptors(e.extras)
+      };
+    },
+    fromClassDescriptor: function fromClassDescriptor(e) {
+      var r = {
+        kind: "class",
+        elements: e.map(this.fromElementDescriptor, this)
+      };
+      return Object.defineProperty(r, Symbol.toStringTag, {
+        value: "Descriptor",
+        configurable: !0
+      }), r;
+    },
+    toClassDescriptor: function toClassDescriptor(e) {
+      var r = e.kind + "";
+      if ("class" !== r) throw new TypeError('A class descriptor\'s .kind property must be "class", but a decorator created a class descriptor with .kind "' + r + '"');
+      this.disallowProperty(e, "key", "A class descriptor"), this.disallowProperty(e, "placement", "A class descriptor"), this.disallowProperty(e, "descriptor", "A class descriptor"), this.disallowProperty(e, "initializer", "A class descriptor"), this.disallowProperty(e, "extras", "A class descriptor");
+      var t = _optionalCallableProperty(e, "finisher");
+      return {
+        elements: this.toElementDescriptors(e.elements),
+        finisher: t
+      };
+    },
+    runClassFinishers: function runClassFinishers(e, r) {
+      for (var t = 0; t < r.length; t++) {
+        var i = (0, r[t])(e);
+        if (void 0 !== i) {
+          if ("function" != typeof i) throw new TypeError("Finishers must return a constructor.");
+          e = i;
+        }
+      }
+      return e;
+    },
+    disallowProperty: function disallowProperty(e, r, t) {
+      if (void 0 !== e[r]) throw new TypeError(t + " can't have a ." + r + " property.");
+    }
+  };
+  return e;
+}
+function _createElementDescriptor(e) {
+  var r,
+    t = toPropertyKey(e.key);
+  "method" === e.kind ? r = {
+    value: e.value,
+    writable: !0,
+    configurable: !0,
+    enumerable: !1
+  } : "get" === e.kind ? r = {
+    get: e.value,
+    configurable: !0,
+    enumerable: !1
+  } : "set" === e.kind ? r = {
+    set: e.value,
+    configurable: !0,
+    enumerable: !1
+  } : "field" === e.kind && (r = {
+    configurable: !0,
+    writable: !0,
+    enumerable: !0
+  });
+  var i = {
+    kind: "field" === e.kind ? "field" : "method",
+    key: t,
+    placement: e["static"] ? "static" : "field" === e.kind ? "own" : "prototype",
+    descriptor: r
+  };
+  return e.decorators && (i.decorators = e.decorators), "field" === e.kind && (i.initializer = e.value), i;
+}
+function _coalesceGetterSetter(e, r) {
+  void 0 !== e.descriptor.get ? r.descriptor.get = e.descriptor.get : r.descriptor.set = e.descriptor.set;
+}
+function _coalesceClassElements(e) {
+  for (var r = [], isSameElement = function isSameElement(e) {
+      return "method" === e.kind && e.key === o.key && e.placement === o.placement;
+    }, t = 0; t < e.length; t++) {
+    var i,
+      o = e[t];
+    if ("method" === o.kind && (i = r.find(isSameElement))) {
+      if (_isDataDescriptor(o.descriptor) || _isDataDescriptor(i.descriptor)) {
+        if (_hasDecorators(o) || _hasDecorators(i)) throw new ReferenceError("Duplicated methods (" + o.key + ") can't be decorated.");
+        i.descriptor = o.descriptor;
+      } else {
+        if (_hasDecorators(o)) {
+          if (_hasDecorators(i)) throw new ReferenceError("Decorators can't be placed on different accessors with for the same property (" + o.key + ").");
+          i.decorators = o.decorators;
+        }
+        _coalesceGetterSetter(o, i);
+      }
+    } else r.push(o);
+  }
+  return r;
+}
+function _hasDecorators(e) {
+  return e.decorators && e.decorators.length;
+}
+function _isDataDescriptor(e) {
+  return void 0 !== e && !(void 0 === e.value && void 0 === e.writable);
+}
+function _optionalCallableProperty(e, r) {
+  var t = e[r];
+  if (void 0 !== t && "function" != typeof t) throw new TypeError("Expected '" + r + "' to be a function");
+  return t;
+}
+module.exports = _decorate, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/defaults.js b/mqtt-backend/node_modules/@babel/runtime/helpers/defaults.js
new file mode 100644
index 0000000..dfdbbb0
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/defaults.js
@@ -0,0 +1,9 @@
+function _defaults(e, r) {
+  for (var t = Object.getOwnPropertyNames(r), o = 0; o < t.length; o++) {
+    var n = t[o],
+      a = Object.getOwnPropertyDescriptor(r, n);
+    a && a.configurable && void 0 === e[n] && Object.defineProperty(e, n, a);
+  }
+  return e;
+}
+module.exports = _defaults, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/defineAccessor.js b/mqtt-backend/node_modules/@babel/runtime/helpers/defineAccessor.js
new file mode 100644
index 0000000..dc065f0
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/defineAccessor.js
@@ -0,0 +1,8 @@
+function _defineAccessor(e, r, n, t) {
+  var c = {
+    configurable: !0,
+    enumerable: !0
+  };
+  return c[e] = t, Object.defineProperty(r, n, c);
+}
+module.exports = _defineAccessor, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/defineEnumerableProperties.js b/mqtt-backend/node_modules/@babel/runtime/helpers/defineEnumerableProperties.js
new file mode 100644
index 0000000..ab9f43c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/defineEnumerableProperties.js
@@ -0,0 +1,12 @@
+function _defineEnumerableProperties(e, r) {
+  for (var t in r) {
+    var n = r[t];
+    n.configurable = n.enumerable = !0, "value" in n && (n.writable = !0), Object.defineProperty(e, t, n);
+  }
+  if (Object.getOwnPropertySymbols) for (var a = Object.getOwnPropertySymbols(r), b = 0; b < a.length; b++) {
+    var i = a[b];
+    (n = r[i]).configurable = n.enumerable = !0, "value" in n && (n.writable = !0), Object.defineProperty(e, i, n);
+  }
+  return e;
+}
+module.exports = _defineEnumerableProperties, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/defineProperty.js b/mqtt-backend/node_modules/@babel/runtime/helpers/defineProperty.js
new file mode 100644
index 0000000..2c2ff1e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/defineProperty.js
@@ -0,0 +1,10 @@
+var toPropertyKey = require("./toPropertyKey.js");
+function _defineProperty(e, r, t) {
+  return (r = toPropertyKey(r)) in e ? Object.defineProperty(e, r, {
+    value: t,
+    enumerable: !0,
+    configurable: !0,
+    writable: !0
+  }) : e[r] = t, e;
+}
+module.exports = _defineProperty, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/dispose.js b/mqtt-backend/node_modules/@babel/runtime/helpers/dispose.js
new file mode 100644
index 0000000..c20193c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/dispose.js
@@ -0,0 +1,28 @@
+function dispose_SuppressedError(r, e) {
+  return "undefined" != typeof SuppressedError ? dispose_SuppressedError = SuppressedError : (dispose_SuppressedError = function dispose_SuppressedError(r, e) {
+    this.suppressed = e, this.error = r, this.stack = Error().stack;
+  }, dispose_SuppressedError.prototype = Object.create(Error.prototype, {
+    constructor: {
+      value: dispose_SuppressedError,
+      writable: !0,
+      configurable: !0
+    }
+  })), new dispose_SuppressedError(r, e);
+}
+function _dispose(r, e, s) {
+  function next() {
+    for (; r.length > 0;) try {
+      var o = r.pop(),
+        p = o.d.call(o.v);
+      if (o.a) return Promise.resolve(p).then(next, err);
+    } catch (r) {
+      return err(r);
+    }
+    if (s) throw e;
+  }
+  function err(r) {
+    return e = s ? new dispose_SuppressedError(e, r) : r, s = !0, next();
+  }
+  return next();
+}
+module.exports = _dispose, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/AwaitValue.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/AwaitValue.js
new file mode 100644
index 0000000..6f210c9
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/AwaitValue.js
@@ -0,0 +1,4 @@
+function _AwaitValue(t) {
+  this.wrapped = t;
+}
+export { _AwaitValue as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/OverloadYield.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/OverloadYield.js
new file mode 100644
index 0000000..d7753a6
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/OverloadYield.js
@@ -0,0 +1,4 @@
+function _OverloadYield(e, d) {
+  this.v = e, this.k = d;
+}
+export { _OverloadYield as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecoratedDescriptor.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecoratedDescriptor.js
new file mode 100644
index 0000000..0f33483
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecoratedDescriptor.js
@@ -0,0 +1,9 @@
+function _applyDecoratedDescriptor(i, e, r, n, l) {
+  var a = {};
+  return Object.keys(n).forEach(function (i) {
+    a[i] = n[i];
+  }), a.enumerable = !!a.enumerable, a.configurable = !!a.configurable, ("value" in a || a.initializer) && (a.writable = !0), a = r.slice().reverse().reduce(function (r, n) {
+    return n(i, e, r) || r;
+  }, a), l && void 0 !== a.initializer && (a.value = a.initializer ? a.initializer.call(l) : void 0, a.initializer = void 0), void 0 === a.initializer ? (Object.defineProperty(i, e, a), null) : a;
+}
+export { _applyDecoratedDescriptor as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs.js
new file mode 100644
index 0000000..2b75dfd
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs.js
@@ -0,0 +1,236 @@
+import _typeof from "./typeof.js";
+import setFunctionName from "./setFunctionName.js";
+import toPropertyKey from "./toPropertyKey.js";
+function old_createMetadataMethodsForProperty(e, t, a, r) {
+  return {
+    getMetadata: function getMetadata(o) {
+      old_assertNotFinished(r, "getMetadata"), old_assertMetadataKey(o);
+      var i = e[o];
+      if (void 0 !== i) if (1 === t) {
+        var n = i["public"];
+        if (void 0 !== n) return n[a];
+      } else if (2 === t) {
+        var l = i["private"];
+        if (void 0 !== l) return l.get(a);
+      } else if (Object.hasOwnProperty.call(i, "constructor")) return i.constructor;
+    },
+    setMetadata: function setMetadata(o, i) {
+      old_assertNotFinished(r, "setMetadata"), old_assertMetadataKey(o);
+      var n = e[o];
+      if (void 0 === n && (n = e[o] = {}), 1 === t) {
+        var l = n["public"];
+        void 0 === l && (l = n["public"] = {}), l[a] = i;
+      } else if (2 === t) {
+        var s = n.priv;
+        void 0 === s && (s = n["private"] = new Map()), s.set(a, i);
+      } else n.constructor = i;
+    }
+  };
+}
+function old_convertMetadataMapToFinal(e, t) {
+  var a = e[Symbol.metadata || Symbol["for"]("Symbol.metadata")],
+    r = Object.getOwnPropertySymbols(t);
+  if (0 !== r.length) {
+    for (var o = 0; o < r.length; o++) {
+      var i = r[o],
+        n = t[i],
+        l = a ? a[i] : null,
+        s = n["public"],
+        c = l ? l["public"] : null;
+      s && c && Object.setPrototypeOf(s, c);
+      var d = n["private"];
+      if (d) {
+        var u = Array.from(d.values()),
+          f = l ? l["private"] : null;
+        f && (u = u.concat(f)), n["private"] = u;
+      }
+      l && Object.setPrototypeOf(n, l);
+    }
+    a && Object.setPrototypeOf(t, a), e[Symbol.metadata || Symbol["for"]("Symbol.metadata")] = t;
+  }
+}
+function old_createAddInitializerMethod(e, t) {
+  return function (a) {
+    old_assertNotFinished(t, "addInitializer"), old_assertCallable(a, "An initializer"), e.push(a);
+  };
+}
+function old_memberDec(e, t, a, r, o, i, n, l, s) {
+  var c;
+  switch (i) {
+    case 1:
+      c = "accessor";
+      break;
+    case 2:
+      c = "method";
+      break;
+    case 3:
+      c = "getter";
+      break;
+    case 4:
+      c = "setter";
+      break;
+    default:
+      c = "field";
+  }
+  var d,
+    u,
+    f = {
+      kind: c,
+      name: l ? "#" + t : toPropertyKey(t),
+      isStatic: n,
+      isPrivate: l
+    },
+    p = {
+      v: !1
+    };
+  if (0 !== i && (f.addInitializer = old_createAddInitializerMethod(o, p)), l) {
+    d = 2, u = Symbol(t);
+    var v = {};
+    0 === i ? (v.get = a.get, v.set = a.set) : 2 === i ? v.get = function () {
+      return a.value;
+    } : (1 !== i && 3 !== i || (v.get = function () {
+      return a.get.call(this);
+    }), 1 !== i && 4 !== i || (v.set = function (e) {
+      a.set.call(this, e);
+    })), f.access = v;
+  } else d = 1, u = t;
+  try {
+    return e(s, Object.assign(f, old_createMetadataMethodsForProperty(r, d, u, p)));
+  } finally {
+    p.v = !0;
+  }
+}
+function old_assertNotFinished(e, t) {
+  if (e.v) throw Error("attempted to call " + t + " after decoration was finished");
+}
+function old_assertMetadataKey(e) {
+  if ("symbol" != _typeof(e)) throw new TypeError("Metadata keys must be symbols, received: " + e);
+}
+function old_assertCallable(e, t) {
+  if ("function" != typeof e) throw new TypeError(t + " must be a function");
+}
+function old_assertValidReturnValue(e, t) {
+  var a = _typeof(t);
+  if (1 === e) {
+    if ("object" !== a || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
+    void 0 !== t.get && old_assertCallable(t.get, "accessor.get"), void 0 !== t.set && old_assertCallable(t.set, "accessor.set"), void 0 !== t.init && old_assertCallable(t.init, "accessor.init"), void 0 !== t.initializer && old_assertCallable(t.initializer, "accessor.initializer");
+  } else if ("function" !== a) throw new TypeError((0 === e ? "field" : 10 === e ? "class" : "method") + " decorators must return a function or void 0");
+}
+function old_getInit(e) {
+  var t;
+  return null == (t = e.init) && (t = e.initializer) && void 0 !== console && console.warn(".initializer has been renamed to .init as of March 2022"), t;
+}
+function old_applyMemberDec(e, t, a, r, o, i, n, l, s) {
+  var c,
+    d,
+    u,
+    f,
+    p,
+    v,
+    y,
+    h = a[0];
+  if (n ? (0 === o || 1 === o ? (c = {
+    get: a[3],
+    set: a[4]
+  }, u = "get") : 3 === o ? (c = {
+    get: a[3]
+  }, u = "get") : 4 === o ? (c = {
+    set: a[3]
+  }, u = "set") : c = {
+    value: a[3]
+  }, 0 !== o && (1 === o && setFunctionName(a[4], "#" + r, "set"), setFunctionName(a[3], "#" + r, u))) : 0 !== o && (c = Object.getOwnPropertyDescriptor(t, r)), 1 === o ? f = {
+    get: c.get,
+    set: c.set
+  } : 2 === o ? f = c.value : 3 === o ? f = c.get : 4 === o && (f = c.set), "function" == typeof h) void 0 !== (p = old_memberDec(h, r, c, l, s, o, i, n, f)) && (old_assertValidReturnValue(o, p), 0 === o ? d = p : 1 === o ? (d = old_getInit(p), v = p.get || f.get, y = p.set || f.set, f = {
+    get: v,
+    set: y
+  }) : f = p);else for (var m = h.length - 1; m >= 0; m--) {
+    var b;
+    void 0 !== (p = old_memberDec(h[m], r, c, l, s, o, i, n, f)) && (old_assertValidReturnValue(o, p), 0 === o ? b = p : 1 === o ? (b = old_getInit(p), v = p.get || f.get, y = p.set || f.set, f = {
+      get: v,
+      set: y
+    }) : f = p, void 0 !== b && (void 0 === d ? d = b : "function" == typeof d ? d = [d, b] : d.push(b)));
+  }
+  if (0 === o || 1 === o) {
+    if (void 0 === d) d = function d(e, t) {
+      return t;
+    };else if ("function" != typeof d) {
+      var g = d;
+      d = function d(e, t) {
+        for (var a = t, r = 0; r < g.length; r++) a = g[r].call(e, a);
+        return a;
+      };
+    } else {
+      var _ = d;
+      d = function d(e, t) {
+        return _.call(e, t);
+      };
+    }
+    e.push(d);
+  }
+  0 !== o && (1 === o ? (c.get = f.get, c.set = f.set) : 2 === o ? c.value = f : 3 === o ? c.get = f : 4 === o && (c.set = f), n ? 1 === o ? (e.push(function (e, t) {
+    return f.get.call(e, t);
+  }), e.push(function (e, t) {
+    return f.set.call(e, t);
+  })) : 2 === o ? e.push(f) : e.push(function (e, t) {
+    return f.call(e, t);
+  }) : Object.defineProperty(t, r, c));
+}
+function old_applyMemberDecs(e, t, a, r, o) {
+  for (var i, n, l = new Map(), s = new Map(), c = 0; c < o.length; c++) {
+    var d = o[c];
+    if (Array.isArray(d)) {
+      var u,
+        f,
+        p,
+        v = d[1],
+        y = d[2],
+        h = d.length > 3,
+        m = v >= 5;
+      if (m ? (u = t, f = r, 0 != (v -= 5) && (p = n = n || [])) : (u = t.prototype, f = a, 0 !== v && (p = i = i || [])), 0 !== v && !h) {
+        var b = m ? s : l,
+          g = b.get(y) || 0;
+        if (!0 === g || 3 === g && 4 !== v || 4 === g && 3 !== v) throw Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + y);
+        !g && v > 2 ? b.set(y, v) : b.set(y, !0);
+      }
+      old_applyMemberDec(e, u, d, y, v, m, h, f, p);
+    }
+  }
+  old_pushInitializers(e, i), old_pushInitializers(e, n);
+}
+function old_pushInitializers(e, t) {
+  t && e.push(function (e) {
+    for (var a = 0; a < t.length; a++) t[a].call(e);
+    return e;
+  });
+}
+function old_applyClassDecs(e, t, a, r) {
+  if (r.length > 0) {
+    for (var o = [], i = t, n = t.name, l = r.length - 1; l >= 0; l--) {
+      var s = {
+        v: !1
+      };
+      try {
+        var c = Object.assign({
+            kind: "class",
+            name: n,
+            addInitializer: old_createAddInitializerMethod(o, s)
+          }, old_createMetadataMethodsForProperty(a, 0, n, s)),
+          d = r[l](i, c);
+      } finally {
+        s.v = !0;
+      }
+      void 0 !== d && (old_assertValidReturnValue(10, d), i = d);
+    }
+    e.push(i, function () {
+      for (var e = 0; e < o.length; e++) o[e].call(i);
+    });
+  }
+}
+function applyDecs(e, t, a) {
+  var r = [],
+    o = {},
+    i = {};
+  return old_applyMemberDecs(r, e, i, o, t), old_convertMetadataMapToFinal(e.prototype, i), old_applyClassDecs(r, e, o, a), old_convertMetadataMapToFinal(e, o), r;
+}
+export { applyDecs as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2203.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2203.js
new file mode 100644
index 0000000..8a9d7c5
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2203.js
@@ -0,0 +1,184 @@
+import _typeof from "./typeof.js";
+function applyDecs2203Factory() {
+  function createAddInitializerMethod(e, t) {
+    return function (r) {
+      !function (e) {
+        if (e.v) throw Error("attempted to call addInitializer after decoration was finished");
+      }(t), assertCallable(r, "An initializer"), e.push(r);
+    };
+  }
+  function memberDec(e, t, r, a, n, i, s, o) {
+    var c;
+    switch (n) {
+      case 1:
+        c = "accessor";
+        break;
+      case 2:
+        c = "method";
+        break;
+      case 3:
+        c = "getter";
+        break;
+      case 4:
+        c = "setter";
+        break;
+      default:
+        c = "field";
+    }
+    var l,
+      u,
+      f = {
+        kind: c,
+        name: s ? "#" + t : t,
+        "static": i,
+        "private": s
+      },
+      p = {
+        v: !1
+      };
+    0 !== n && (f.addInitializer = createAddInitializerMethod(a, p)), 0 === n ? s ? (l = r.get, u = r.set) : (l = function l() {
+      return this[t];
+    }, u = function u(e) {
+      this[t] = e;
+    }) : 2 === n ? l = function l() {
+      return r.value;
+    } : (1 !== n && 3 !== n || (l = function l() {
+      return r.get.call(this);
+    }), 1 !== n && 4 !== n || (u = function u(e) {
+      r.set.call(this, e);
+    })), f.access = l && u ? {
+      get: l,
+      set: u
+    } : l ? {
+      get: l
+    } : {
+      set: u
+    };
+    try {
+      return e(o, f);
+    } finally {
+      p.v = !0;
+    }
+  }
+  function assertCallable(e, t) {
+    if ("function" != typeof e) throw new TypeError(t + " must be a function");
+  }
+  function assertValidReturnValue(e, t) {
+    var r = _typeof(t);
+    if (1 === e) {
+      if ("object" !== r || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
+      void 0 !== t.get && assertCallable(t.get, "accessor.get"), void 0 !== t.set && assertCallable(t.set, "accessor.set"), void 0 !== t.init && assertCallable(t.init, "accessor.init");
+    } else if ("function" !== r) throw new TypeError((0 === e ? "field" : 10 === e ? "class" : "method") + " decorators must return a function or void 0");
+  }
+  function applyMemberDec(e, t, r, a, n, i, s, o) {
+    var c,
+      l,
+      u,
+      f,
+      p,
+      d,
+      h = r[0];
+    if (s ? c = 0 === n || 1 === n ? {
+      get: r[3],
+      set: r[4]
+    } : 3 === n ? {
+      get: r[3]
+    } : 4 === n ? {
+      set: r[3]
+    } : {
+      value: r[3]
+    } : 0 !== n && (c = Object.getOwnPropertyDescriptor(t, a)), 1 === n ? u = {
+      get: c.get,
+      set: c.set
+    } : 2 === n ? u = c.value : 3 === n ? u = c.get : 4 === n && (u = c.set), "function" == typeof h) void 0 !== (f = memberDec(h, a, c, o, n, i, s, u)) && (assertValidReturnValue(n, f), 0 === n ? l = f : 1 === n ? (l = f.init, p = f.get || u.get, d = f.set || u.set, u = {
+      get: p,
+      set: d
+    }) : u = f);else for (var v = h.length - 1; v >= 0; v--) {
+      var g;
+      void 0 !== (f = memberDec(h[v], a, c, o, n, i, s, u)) && (assertValidReturnValue(n, f), 0 === n ? g = f : 1 === n ? (g = f.init, p = f.get || u.get, d = f.set || u.set, u = {
+        get: p,
+        set: d
+      }) : u = f, void 0 !== g && (void 0 === l ? l = g : "function" == typeof l ? l = [l, g] : l.push(g)));
+    }
+    if (0 === n || 1 === n) {
+      if (void 0 === l) l = function l(e, t) {
+        return t;
+      };else if ("function" != typeof l) {
+        var y = l;
+        l = function l(e, t) {
+          for (var r = t, a = 0; a < y.length; a++) r = y[a].call(e, r);
+          return r;
+        };
+      } else {
+        var m = l;
+        l = function l(e, t) {
+          return m.call(e, t);
+        };
+      }
+      e.push(l);
+    }
+    0 !== n && (1 === n ? (c.get = u.get, c.set = u.set) : 2 === n ? c.value = u : 3 === n ? c.get = u : 4 === n && (c.set = u), s ? 1 === n ? (e.push(function (e, t) {
+      return u.get.call(e, t);
+    }), e.push(function (e, t) {
+      return u.set.call(e, t);
+    })) : 2 === n ? e.push(u) : e.push(function (e, t) {
+      return u.call(e, t);
+    }) : Object.defineProperty(t, a, c));
+  }
+  function pushInitializers(e, t) {
+    t && e.push(function (e) {
+      for (var r = 0; r < t.length; r++) t[r].call(e);
+      return e;
+    });
+  }
+  return function (e, t, r) {
+    var a = [];
+    return function (e, t, r) {
+      for (var a, n, i = new Map(), s = new Map(), o = 0; o < r.length; o++) {
+        var c = r[o];
+        if (Array.isArray(c)) {
+          var l,
+            u,
+            f = c[1],
+            p = c[2],
+            d = c.length > 3,
+            h = f >= 5;
+          if (h ? (l = t, 0 != (f -= 5) && (u = n = n || [])) : (l = t.prototype, 0 !== f && (u = a = a || [])), 0 !== f && !d) {
+            var v = h ? s : i,
+              g = v.get(p) || 0;
+            if (!0 === g || 3 === g && 4 !== f || 4 === g && 3 !== f) throw Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + p);
+            !g && f > 2 ? v.set(p, f) : v.set(p, !0);
+          }
+          applyMemberDec(e, l, c, p, f, h, d, u);
+        }
+      }
+      pushInitializers(e, a), pushInitializers(e, n);
+    }(a, e, t), function (e, t, r) {
+      if (r.length > 0) {
+        for (var a = [], n = t, i = t.name, s = r.length - 1; s >= 0; s--) {
+          var o = {
+            v: !1
+          };
+          try {
+            var c = r[s](n, {
+              kind: "class",
+              name: i,
+              addInitializer: createAddInitializerMethod(a, o)
+            });
+          } finally {
+            o.v = !0;
+          }
+          void 0 !== c && (assertValidReturnValue(10, c), n = c);
+        }
+        e.push(n, function () {
+          for (var e = 0; e < a.length; e++) a[e].call(n);
+        });
+      }
+    }(a, e, r), a;
+  };
+}
+var applyDecs2203Impl;
+function applyDecs2203(e, t, r) {
+  return (applyDecs2203Impl = applyDecs2203Impl || applyDecs2203Factory())(e, t, r);
+}
+export { applyDecs2203 as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2203R.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2203R.js
new file mode 100644
index 0000000..bccc42e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2203R.js
@@ -0,0 +1,191 @@
+import _typeof from "./typeof.js";
+import setFunctionName from "./setFunctionName.js";
+import toPropertyKey from "./toPropertyKey.js";
+function applyDecs2203RFactory() {
+  function createAddInitializerMethod(e, t) {
+    return function (r) {
+      !function (e) {
+        if (e.v) throw Error("attempted to call addInitializer after decoration was finished");
+      }(t), assertCallable(r, "An initializer"), e.push(r);
+    };
+  }
+  function memberDec(e, t, r, n, a, i, o, s) {
+    var c;
+    switch (a) {
+      case 1:
+        c = "accessor";
+        break;
+      case 2:
+        c = "method";
+        break;
+      case 3:
+        c = "getter";
+        break;
+      case 4:
+        c = "setter";
+        break;
+      default:
+        c = "field";
+    }
+    var l,
+      u,
+      f = {
+        kind: c,
+        name: o ? "#" + t : toPropertyKey(t),
+        "static": i,
+        "private": o
+      },
+      p = {
+        v: !1
+      };
+    0 !== a && (f.addInitializer = createAddInitializerMethod(n, p)), 0 === a ? o ? (l = r.get, u = r.set) : (l = function l() {
+      return this[t];
+    }, u = function u(e) {
+      this[t] = e;
+    }) : 2 === a ? l = function l() {
+      return r.value;
+    } : (1 !== a && 3 !== a || (l = function l() {
+      return r.get.call(this);
+    }), 1 !== a && 4 !== a || (u = function u(e) {
+      r.set.call(this, e);
+    })), f.access = l && u ? {
+      get: l,
+      set: u
+    } : l ? {
+      get: l
+    } : {
+      set: u
+    };
+    try {
+      return e(s, f);
+    } finally {
+      p.v = !0;
+    }
+  }
+  function assertCallable(e, t) {
+    if ("function" != typeof e) throw new TypeError(t + " must be a function");
+  }
+  function assertValidReturnValue(e, t) {
+    var r = _typeof(t);
+    if (1 === e) {
+      if ("object" !== r || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
+      void 0 !== t.get && assertCallable(t.get, "accessor.get"), void 0 !== t.set && assertCallable(t.set, "accessor.set"), void 0 !== t.init && assertCallable(t.init, "accessor.init");
+    } else if ("function" !== r) throw new TypeError((0 === e ? "field" : 10 === e ? "class" : "method") + " decorators must return a function or void 0");
+  }
+  function applyMemberDec(e, t, r, n, a, i, o, s) {
+    var c,
+      l,
+      u,
+      f,
+      p,
+      d,
+      h,
+      v = r[0];
+    if (o ? (0 === a || 1 === a ? (c = {
+      get: r[3],
+      set: r[4]
+    }, u = "get") : 3 === a ? (c = {
+      get: r[3]
+    }, u = "get") : 4 === a ? (c = {
+      set: r[3]
+    }, u = "set") : c = {
+      value: r[3]
+    }, 0 !== a && (1 === a && setFunctionName(r[4], "#" + n, "set"), setFunctionName(r[3], "#" + n, u))) : 0 !== a && (c = Object.getOwnPropertyDescriptor(t, n)), 1 === a ? f = {
+      get: c.get,
+      set: c.set
+    } : 2 === a ? f = c.value : 3 === a ? f = c.get : 4 === a && (f = c.set), "function" == typeof v) void 0 !== (p = memberDec(v, n, c, s, a, i, o, f)) && (assertValidReturnValue(a, p), 0 === a ? l = p : 1 === a ? (l = p.init, d = p.get || f.get, h = p.set || f.set, f = {
+      get: d,
+      set: h
+    }) : f = p);else for (var g = v.length - 1; g >= 0; g--) {
+      var y;
+      void 0 !== (p = memberDec(v[g], n, c, s, a, i, o, f)) && (assertValidReturnValue(a, p), 0 === a ? y = p : 1 === a ? (y = p.init, d = p.get || f.get, h = p.set || f.set, f = {
+        get: d,
+        set: h
+      }) : f = p, void 0 !== y && (void 0 === l ? l = y : "function" == typeof l ? l = [l, y] : l.push(y)));
+    }
+    if (0 === a || 1 === a) {
+      if (void 0 === l) l = function l(e, t) {
+        return t;
+      };else if ("function" != typeof l) {
+        var m = l;
+        l = function l(e, t) {
+          for (var r = t, n = 0; n < m.length; n++) r = m[n].call(e, r);
+          return r;
+        };
+      } else {
+        var b = l;
+        l = function l(e, t) {
+          return b.call(e, t);
+        };
+      }
+      e.push(l);
+    }
+    0 !== a && (1 === a ? (c.get = f.get, c.set = f.set) : 2 === a ? c.value = f : 3 === a ? c.get = f : 4 === a && (c.set = f), o ? 1 === a ? (e.push(function (e, t) {
+      return f.get.call(e, t);
+    }), e.push(function (e, t) {
+      return f.set.call(e, t);
+    })) : 2 === a ? e.push(f) : e.push(function (e, t) {
+      return f.call(e, t);
+    }) : Object.defineProperty(t, n, c));
+  }
+  function applyMemberDecs(e, t) {
+    for (var r, n, a = [], i = new Map(), o = new Map(), s = 0; s < t.length; s++) {
+      var c = t[s];
+      if (Array.isArray(c)) {
+        var l,
+          u,
+          f = c[1],
+          p = c[2],
+          d = c.length > 3,
+          h = f >= 5;
+        if (h ? (l = e, 0 != (f -= 5) && (u = n = n || [])) : (l = e.prototype, 0 !== f && (u = r = r || [])), 0 !== f && !d) {
+          var v = h ? o : i,
+            g = v.get(p) || 0;
+          if (!0 === g || 3 === g && 4 !== f || 4 === g && 3 !== f) throw Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + p);
+          !g && f > 2 ? v.set(p, f) : v.set(p, !0);
+        }
+        applyMemberDec(a, l, c, p, f, h, d, u);
+      }
+    }
+    return pushInitializers(a, r), pushInitializers(a, n), a;
+  }
+  function pushInitializers(e, t) {
+    t && e.push(function (e) {
+      for (var r = 0; r < t.length; r++) t[r].call(e);
+      return e;
+    });
+  }
+  return function (e, t, r) {
+    return {
+      e: applyMemberDecs(e, t),
+      get c() {
+        return function (e, t) {
+          if (t.length > 0) {
+            for (var r = [], n = e, a = e.name, i = t.length - 1; i >= 0; i--) {
+              var o = {
+                v: !1
+              };
+              try {
+                var s = t[i](n, {
+                  kind: "class",
+                  name: a,
+                  addInitializer: createAddInitializerMethod(r, o)
+                });
+              } finally {
+                o.v = !0;
+              }
+              void 0 !== s && (assertValidReturnValue(10, s), n = s);
+            }
+            return [n, function () {
+              for (var e = 0; e < r.length; e++) r[e].call(n);
+            }];
+          }
+        }(e, r);
+      }
+    };
+  };
+}
+function applyDecs2203R(e, t, r) {
+  return (applyDecs2203R = applyDecs2203RFactory())(e, t, r);
+}
+export { applyDecs2203R as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2301.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2301.js
new file mode 100644
index 0000000..8d110f7
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2301.js
@@ -0,0 +1,222 @@
+import _typeof from "./typeof.js";
+import checkInRHS from "./checkInRHS.js";
+import setFunctionName from "./setFunctionName.js";
+import toPropertyKey from "./toPropertyKey.js";
+function applyDecs2301Factory() {
+  function createAddInitializerMethod(e, t) {
+    return function (r) {
+      !function (e) {
+        if (e.v) throw Error("attempted to call addInitializer after decoration was finished");
+      }(t), assertCallable(r, "An initializer"), e.push(r);
+    };
+  }
+  function assertInstanceIfPrivate(e, t) {
+    if (!e(t)) throw new TypeError("Attempted to access private element on non-instance");
+  }
+  function memberDec(e, t, r, n, a, i, s, o, c) {
+    var u;
+    switch (a) {
+      case 1:
+        u = "accessor";
+        break;
+      case 2:
+        u = "method";
+        break;
+      case 3:
+        u = "getter";
+        break;
+      case 4:
+        u = "setter";
+        break;
+      default:
+        u = "field";
+    }
+    var l,
+      f,
+      p = {
+        kind: u,
+        name: s ? "#" + t : toPropertyKey(t),
+        "static": i,
+        "private": s
+      },
+      d = {
+        v: !1
+      };
+    if (0 !== a && (p.addInitializer = createAddInitializerMethod(n, d)), s || 0 !== a && 2 !== a) {
+      if (2 === a) l = function l(e) {
+        return assertInstanceIfPrivate(c, e), r.value;
+      };else {
+        var h = 0 === a || 1 === a;
+        (h || 3 === a) && (l = s ? function (e) {
+          return assertInstanceIfPrivate(c, e), r.get.call(e);
+        } : function (e) {
+          return r.get.call(e);
+        }), (h || 4 === a) && (f = s ? function (e, t) {
+          assertInstanceIfPrivate(c, e), r.set.call(e, t);
+        } : function (e, t) {
+          r.set.call(e, t);
+        });
+      }
+    } else l = function l(e) {
+      return e[t];
+    }, 0 === a && (f = function f(e, r) {
+      e[t] = r;
+    });
+    var v = s ? c.bind() : function (e) {
+      return t in e;
+    };
+    p.access = l && f ? {
+      get: l,
+      set: f,
+      has: v
+    } : l ? {
+      get: l,
+      has: v
+    } : {
+      set: f,
+      has: v
+    };
+    try {
+      return e(o, p);
+    } finally {
+      d.v = !0;
+    }
+  }
+  function assertCallable(e, t) {
+    if ("function" != typeof e) throw new TypeError(t + " must be a function");
+  }
+  function assertValidReturnValue(e, t) {
+    var r = _typeof(t);
+    if (1 === e) {
+      if ("object" !== r || null === t) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
+      void 0 !== t.get && assertCallable(t.get, "accessor.get"), void 0 !== t.set && assertCallable(t.set, "accessor.set"), void 0 !== t.init && assertCallable(t.init, "accessor.init");
+    } else if ("function" !== r) throw new TypeError((0 === e ? "field" : 10 === e ? "class" : "method") + " decorators must return a function or void 0");
+  }
+  function curryThis2(e) {
+    return function (t) {
+      e(this, t);
+    };
+  }
+  function applyMemberDec(e, t, r, n, a, i, s, o, c) {
+    var u,
+      l,
+      f,
+      p,
+      d,
+      h,
+      v,
+      y,
+      g = r[0];
+    if (s ? (0 === a || 1 === a ? (u = {
+      get: (d = r[3], function () {
+        return d(this);
+      }),
+      set: curryThis2(r[4])
+    }, f = "get") : 3 === a ? (u = {
+      get: r[3]
+    }, f = "get") : 4 === a ? (u = {
+      set: r[3]
+    }, f = "set") : u = {
+      value: r[3]
+    }, 0 !== a && (1 === a && setFunctionName(u.set, "#" + n, "set"), setFunctionName(u[f || "value"], "#" + n, f))) : 0 !== a && (u = Object.getOwnPropertyDescriptor(t, n)), 1 === a ? p = {
+      get: u.get,
+      set: u.set
+    } : 2 === a ? p = u.value : 3 === a ? p = u.get : 4 === a && (p = u.set), "function" == typeof g) void 0 !== (h = memberDec(g, n, u, o, a, i, s, p, c)) && (assertValidReturnValue(a, h), 0 === a ? l = h : 1 === a ? (l = h.init, v = h.get || p.get, y = h.set || p.set, p = {
+      get: v,
+      set: y
+    }) : p = h);else for (var m = g.length - 1; m >= 0; m--) {
+      var b;
+      void 0 !== (h = memberDec(g[m], n, u, o, a, i, s, p, c)) && (assertValidReturnValue(a, h), 0 === a ? b = h : 1 === a ? (b = h.init, v = h.get || p.get, y = h.set || p.set, p = {
+        get: v,
+        set: y
+      }) : p = h, void 0 !== b && (void 0 === l ? l = b : "function" == typeof l ? l = [l, b] : l.push(b)));
+    }
+    if (0 === a || 1 === a) {
+      if (void 0 === l) l = function l(e, t) {
+        return t;
+      };else if ("function" != typeof l) {
+        var I = l;
+        l = function l(e, t) {
+          for (var r = t, n = 0; n < I.length; n++) r = I[n].call(e, r);
+          return r;
+        };
+      } else {
+        var w = l;
+        l = function l(e, t) {
+          return w.call(e, t);
+        };
+      }
+      e.push(l);
+    }
+    0 !== a && (1 === a ? (u.get = p.get, u.set = p.set) : 2 === a ? u.value = p : 3 === a ? u.get = p : 4 === a && (u.set = p), s ? 1 === a ? (e.push(function (e, t) {
+      return p.get.call(e, t);
+    }), e.push(function (e, t) {
+      return p.set.call(e, t);
+    })) : 2 === a ? e.push(p) : e.push(function (e, t) {
+      return p.call(e, t);
+    }) : Object.defineProperty(t, n, u));
+  }
+  function applyMemberDecs(e, t, r) {
+    for (var n, a, i, s = [], o = new Map(), c = new Map(), u = 0; u < t.length; u++) {
+      var l = t[u];
+      if (Array.isArray(l)) {
+        var f,
+          p,
+          d = l[1],
+          h = l[2],
+          v = l.length > 3,
+          y = d >= 5,
+          g = r;
+        if (y ? (f = e, 0 != (d -= 5) && (p = a = a || []), v && !i && (i = function i(t) {
+          return checkInRHS(t) === e;
+        }), g = i) : (f = e.prototype, 0 !== d && (p = n = n || [])), 0 !== d && !v) {
+          var m = y ? c : o,
+            b = m.get(h) || 0;
+          if (!0 === b || 3 === b && 4 !== d || 4 === b && 3 !== d) throw Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + h);
+          !b && d > 2 ? m.set(h, d) : m.set(h, !0);
+        }
+        applyMemberDec(s, f, l, h, d, y, v, p, g);
+      }
+    }
+    return pushInitializers(s, n), pushInitializers(s, a), s;
+  }
+  function pushInitializers(e, t) {
+    t && e.push(function (e) {
+      for (var r = 0; r < t.length; r++) t[r].call(e);
+      return e;
+    });
+  }
+  return function (e, t, r, n) {
+    return {
+      e: applyMemberDecs(e, t, n),
+      get c() {
+        return function (e, t) {
+          if (t.length > 0) {
+            for (var r = [], n = e, a = e.name, i = t.length - 1; i >= 0; i--) {
+              var s = {
+                v: !1
+              };
+              try {
+                var o = t[i](n, {
+                  kind: "class",
+                  name: a,
+                  addInitializer: createAddInitializerMethod(r, s)
+                });
+              } finally {
+                s.v = !0;
+              }
+              void 0 !== o && (assertValidReturnValue(10, o), n = o);
+            }
+            return [n, function () {
+              for (var e = 0; e < r.length; e++) r[e].call(n);
+            }];
+          }
+        }(e, r);
+      }
+    };
+  };
+}
+function applyDecs2301(e, t, r, n) {
+  return (applyDecs2301 = applyDecs2301Factory())(e, t, r, n);
+}
+export { applyDecs2301 as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2305.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2305.js
new file mode 100644
index 0000000..a11b2b9
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2305.js
@@ -0,0 +1,133 @@
+import _typeof from "./typeof.js";
+import checkInRHS from "./checkInRHS.js";
+import setFunctionName from "./setFunctionName.js";
+import toPropertyKey from "./toPropertyKey.js";
+function applyDecs2305(e, t, r, n, o, a) {
+  function i(e, t, r) {
+    return function (n, o) {
+      return r && r(n), e[t].call(n, o);
+    };
+  }
+  function c(e, t) {
+    for (var r = 0; r < e.length; r++) e[r].call(t);
+    return t;
+  }
+  function s(e, t, r, n) {
+    if ("function" != typeof e && (n || void 0 !== e)) throw new TypeError(t + " must " + (r || "be") + " a function" + (n ? "" : " or undefined"));
+    return e;
+  }
+  function applyDec(e, t, r, n, o, a, c, u, l, f, p, d, h) {
+    function m(e) {
+      if (!h(e)) throw new TypeError("Attempted to access private element on non-instance");
+    }
+    var y,
+      v = t[0],
+      g = t[3],
+      b = !u;
+    if (!b) {
+      r || Array.isArray(v) || (v = [v]);
+      var w = {},
+        S = [],
+        A = 3 === o ? "get" : 4 === o || d ? "set" : "value";
+      f ? (p || d ? w = {
+        get: setFunctionName(function () {
+          return g(this);
+        }, n, "get"),
+        set: function set(e) {
+          t[4](this, e);
+        }
+      } : w[A] = g, p || setFunctionName(w[A], n, 2 === o ? "" : A)) : p || (w = Object.getOwnPropertyDescriptor(e, n));
+    }
+    for (var P = e, j = v.length - 1; j >= 0; j -= r ? 2 : 1) {
+      var D = v[j],
+        E = r ? v[j - 1] : void 0,
+        I = {},
+        O = {
+          kind: ["field", "accessor", "method", "getter", "setter", "class"][o],
+          name: n,
+          metadata: a,
+          addInitializer: function (e, t) {
+            if (e.v) throw Error("attempted to call addInitializer after decoration was finished");
+            s(t, "An initializer", "be", !0), c.push(t);
+          }.bind(null, I)
+        };
+      try {
+        if (b) (y = s(D.call(E, P, O), "class decorators", "return")) && (P = y);else {
+          var k, F;
+          O["static"] = l, O["private"] = f, f ? 2 === o ? k = function k(e) {
+            return m(e), w.value;
+          } : (o < 4 && (k = i(w, "get", m)), 3 !== o && (F = i(w, "set", m))) : (k = function k(e) {
+            return e[n];
+          }, (o < 2 || 4 === o) && (F = function F(e, t) {
+            e[n] = t;
+          }));
+          var N = O.access = {
+            has: f ? h.bind() : function (e) {
+              return n in e;
+            }
+          };
+          if (k && (N.get = k), F && (N.set = F), P = D.call(E, d ? {
+            get: w.get,
+            set: w.set
+          } : w[A], O), d) {
+            if ("object" == _typeof(P) && P) (y = s(P.get, "accessor.get")) && (w.get = y), (y = s(P.set, "accessor.set")) && (w.set = y), (y = s(P.init, "accessor.init")) && S.push(y);else if (void 0 !== P) throw new TypeError("accessor decorators must return an object with get, set, or init properties or void 0");
+          } else s(P, (p ? "field" : "method") + " decorators", "return") && (p ? S.push(P) : w[A] = P);
+        }
+      } finally {
+        I.v = !0;
+      }
+    }
+    return (p || d) && u.push(function (e, t) {
+      for (var r = S.length - 1; r >= 0; r--) t = S[r].call(e, t);
+      return t;
+    }), p || b || (f ? d ? u.push(i(w, "get"), i(w, "set")) : u.push(2 === o ? w[A] : i.call.bind(w[A])) : Object.defineProperty(e, n, w)), P;
+  }
+  function u(e, t) {
+    return Object.defineProperty(e, Symbol.metadata || Symbol["for"]("Symbol.metadata"), {
+      configurable: !0,
+      enumerable: !0,
+      value: t
+    });
+  }
+  if (arguments.length >= 6) var l = a[Symbol.metadata || Symbol["for"]("Symbol.metadata")];
+  var f = Object.create(null == l ? null : l),
+    p = function (e, t, r, n) {
+      var o,
+        a,
+        i = [],
+        s = function s(t) {
+          return checkInRHS(t) === e;
+        },
+        u = new Map();
+      function l(e) {
+        e && i.push(c.bind(null, e));
+      }
+      for (var f = 0; f < t.length; f++) {
+        var p = t[f];
+        if (Array.isArray(p)) {
+          var d = p[1],
+            h = p[2],
+            m = p.length > 3,
+            y = 16 & d,
+            v = !!(8 & d),
+            g = 0 == (d &= 7),
+            b = h + "/" + v;
+          if (!g && !m) {
+            var w = u.get(b);
+            if (!0 === w || 3 === w && 4 !== d || 4 === w && 3 !== d) throw Error("Attempted to decorate a public method/accessor that has the same name as a previously decorated public method/accessor. This is not currently supported by the decorators plugin. Property name was: " + h);
+            u.set(b, !(d > 2) || d);
+          }
+          applyDec(v ? e : e.prototype, p, y, m ? "#" + h : toPropertyKey(h), d, n, v ? a = a || [] : o = o || [], i, v, m, g, 1 === d, v && m ? s : r);
+        }
+      }
+      return l(o), l(a), i;
+    }(e, t, o, f);
+  return r.length || u(e, f), {
+    e: p,
+    get c() {
+      var t = [];
+      return r.length && [u(applyDec(e, [r], n, e.name, 5, f, t), f), c.bind(null, t, e)];
+    }
+  };
+}
+export { applyDecs2305 as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2311.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2311.js
new file mode 100644
index 0000000..ab8c0fd
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/applyDecs2311.js
@@ -0,0 +1,124 @@
+import _typeof from "./typeof.js";
+import checkInRHS from "./checkInRHS.js";
+import setFunctionName from "./setFunctionName.js";
+import toPropertyKey from "./toPropertyKey.js";
+function applyDecs2311(e, t, n, r, o, i) {
+  var a,
+    c,
+    u,
+    s,
+    f,
+    l,
+    p,
+    d = Symbol.metadata || Symbol["for"]("Symbol.metadata"),
+    m = Object.defineProperty,
+    h = Object.create,
+    y = [h(null), h(null)],
+    v = t.length;
+  function g(t, n, r) {
+    return function (o, i) {
+      n && (i = o, o = e);
+      for (var a = 0; a < t.length; a++) i = t[a].apply(o, r ? [i] : []);
+      return r ? i : o;
+    };
+  }
+  function b(e, t, n, r) {
+    if ("function" != typeof e && (r || void 0 !== e)) throw new TypeError(t + " must " + (n || "be") + " a function" + (r ? "" : " or undefined"));
+    return e;
+  }
+  function applyDec(e, t, n, r, o, i, u, s, f, l, p) {
+    function d(e) {
+      if (!p(e)) throw new TypeError("Attempted to access private element on non-instance");
+    }
+    var h = [].concat(t[0]),
+      v = t[3],
+      w = !u,
+      D = 1 === o,
+      S = 3 === o,
+      j = 4 === o,
+      E = 2 === o;
+    function I(t, n, r) {
+      return function (o, i) {
+        return n && (i = o, o = e), r && r(o), P[t].call(o, i);
+      };
+    }
+    if (!w) {
+      var P = {},
+        k = [],
+        F = S ? "get" : j || D ? "set" : "value";
+      if (f ? (l || D ? P = {
+        get: setFunctionName(function () {
+          return v(this);
+        }, r, "get"),
+        set: function set(e) {
+          t[4](this, e);
+        }
+      } : P[F] = v, l || setFunctionName(P[F], r, E ? "" : F)) : l || (P = Object.getOwnPropertyDescriptor(e, r)), !l && !f) {
+        if ((c = y[+s][r]) && 7 !== (c ^ o)) throw Error("Decorating two elements with the same name (" + P[F].name + ") is not supported yet");
+        y[+s][r] = o < 3 ? 1 : o;
+      }
+    }
+    for (var N = e, O = h.length - 1; O >= 0; O -= n ? 2 : 1) {
+      var T = b(h[O], "A decorator", "be", !0),
+        z = n ? h[O - 1] : void 0,
+        A = {},
+        H = {
+          kind: ["field", "accessor", "method", "getter", "setter", "class"][o],
+          name: r,
+          metadata: a,
+          addInitializer: function (e, t) {
+            if (e.v) throw new TypeError("attempted to call addInitializer after decoration was finished");
+            b(t, "An initializer", "be", !0), i.push(t);
+          }.bind(null, A)
+        };
+      if (w) c = T.call(z, N, H), A.v = 1, b(c, "class decorators", "return") && (N = c);else if (H["static"] = s, H["private"] = f, c = H.access = {
+        has: f ? p.bind() : function (e) {
+          return r in e;
+        }
+      }, j || (c.get = f ? E ? function (e) {
+        return d(e), P.value;
+      } : I("get", 0, d) : function (e) {
+        return e[r];
+      }), E || S || (c.set = f ? I("set", 0, d) : function (e, t) {
+        e[r] = t;
+      }), N = T.call(z, D ? {
+        get: P.get,
+        set: P.set
+      } : P[F], H), A.v = 1, D) {
+        if ("object" == _typeof(N) && N) (c = b(N.get, "accessor.get")) && (P.get = c), (c = b(N.set, "accessor.set")) && (P.set = c), (c = b(N.init, "accessor.init")) && k.unshift(c);else if (void 0 !== N) throw new TypeError("accessor decorators must return an object with get, set, or init properties or undefined");
+      } else b(N, (l ? "field" : "method") + " decorators", "return") && (l ? k.unshift(N) : P[F] = N);
+    }
+    return o < 2 && u.push(g(k, s, 1), g(i, s, 0)), l || w || (f ? D ? u.splice(-1, 0, I("get", s), I("set", s)) : u.push(E ? P[F] : b.call.bind(P[F])) : m(e, r, P)), N;
+  }
+  function w(e) {
+    return m(e, d, {
+      configurable: !0,
+      enumerable: !0,
+      value: a
+    });
+  }
+  return void 0 !== i && (a = i[d]), a = h(null == a ? null : a), f = [], l = function l(e) {
+    e && f.push(g(e));
+  }, p = function p(t, r) {
+    for (var i = 0; i < n.length; i++) {
+      var a = n[i],
+        c = a[1],
+        l = 7 & c;
+      if ((8 & c) == t && !l == r) {
+        var p = a[2],
+          d = !!a[3],
+          m = 16 & c;
+        applyDec(t ? e : e.prototype, a, m, d ? "#" + p : toPropertyKey(p), l, l < 2 ? [] : t ? s = s || [] : u = u || [], f, !!t, d, r, t && d ? function (t) {
+          return checkInRHS(t) === e;
+        } : o);
+      }
+    }
+  }, p(8, 0), p(0, 0), p(8, 1), p(0, 1), l(u), l(s), c = f, v || w(e), {
+    e: c,
+    get c() {
+      var n = [];
+      return v && [w(e = applyDec(e, [t], r, e.name, 5, n)), g(n, 1)];
+    }
+  };
+}
+export { applyDecs2311 as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/arrayLikeToArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/arrayLikeToArray.js
new file mode 100644
index 0000000..9ace772
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/arrayLikeToArray.js
@@ -0,0 +1,6 @@
+function _arrayLikeToArray(r, a) {
+  (null == a || a > r.length) && (a = r.length);
+  for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e];
+  return n;
+}
+export { _arrayLikeToArray as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/arrayWithHoles.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/arrayWithHoles.js
new file mode 100644
index 0000000..99fa715
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/arrayWithHoles.js
@@ -0,0 +1,4 @@
+function _arrayWithHoles(r) {
+  if (Array.isArray(r)) return r;
+}
+export { _arrayWithHoles as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/arrayWithoutHoles.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/arrayWithoutHoles.js
new file mode 100644
index 0000000..1ce6f21
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/arrayWithoutHoles.js
@@ -0,0 +1,5 @@
+import arrayLikeToArray from "./arrayLikeToArray.js";
+function _arrayWithoutHoles(r) {
+  if (Array.isArray(r)) return arrayLikeToArray(r);
+}
+export { _arrayWithoutHoles as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/assertClassBrand.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/assertClassBrand.js
new file mode 100644
index 0000000..ae7b712
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/assertClassBrand.js
@@ -0,0 +1,5 @@
+function _assertClassBrand(e, t, n) {
+  if ("function" == typeof e ? e === t : e.has(t)) return arguments.length < 3 ? t : n;
+  throw new TypeError("Private element is not present on this object");
+}
+export { _assertClassBrand as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/assertThisInitialized.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/assertThisInitialized.js
new file mode 100644
index 0000000..4a41bde
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/assertThisInitialized.js
@@ -0,0 +1,5 @@
+function _assertThisInitialized(e) {
+  if (void 0 === e) throw new ReferenceError("this hasn't been initialised - super() hasn't been called");
+  return e;
+}
+export { _assertThisInitialized as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/asyncGeneratorDelegate.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/asyncGeneratorDelegate.js
new file mode 100644
index 0000000..e026689
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/asyncGeneratorDelegate.js
@@ -0,0 +1,24 @@
+import OverloadYield from "./OverloadYield.js";
+function _asyncGeneratorDelegate(t) {
+  var e = {},
+    n = !1;
+  function pump(e, r) {
+    return n = !0, r = new Promise(function (n) {
+      n(t[e](r));
+    }), {
+      done: !1,
+      value: new OverloadYield(r, 1)
+    };
+  }
+  return e["undefined" != typeof Symbol && Symbol.iterator || "@@iterator"] = function () {
+    return this;
+  }, e.next = function (t) {
+    return n ? (n = !1, t) : pump("next", t);
+  }, "function" == typeof t["throw"] && (e["throw"] = function (t) {
+    if (n) throw n = !1, t;
+    return pump("throw", t);
+  }), "function" == typeof t["return"] && (e["return"] = function (t) {
+    return n ? (n = !1, t) : pump("return", t);
+  }), e;
+}
+export { _asyncGeneratorDelegate as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/asyncIterator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/asyncIterator.js
new file mode 100644
index 0000000..2ed00b7
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/asyncIterator.js
@@ -0,0 +1,45 @@
+function _asyncIterator(r) {
+  var n,
+    t,
+    o,
+    e = 2;
+  for ("undefined" != typeof Symbol && (t = Symbol.asyncIterator, o = Symbol.iterator); e--;) {
+    if (t && null != (n = r[t])) return n.call(r);
+    if (o && null != (n = r[o])) return new AsyncFromSyncIterator(n.call(r));
+    t = "@@asyncIterator", o = "@@iterator";
+  }
+  throw new TypeError("Object is not async iterable");
+}
+function AsyncFromSyncIterator(r) {
+  function AsyncFromSyncIteratorContinuation(r) {
+    if (Object(r) !== r) return Promise.reject(new TypeError(r + " is not an object."));
+    var n = r.done;
+    return Promise.resolve(r.value).then(function (r) {
+      return {
+        value: r,
+        done: n
+      };
+    });
+  }
+  return AsyncFromSyncIterator = function AsyncFromSyncIterator(r) {
+    this.s = r, this.n = r.next;
+  }, AsyncFromSyncIterator.prototype = {
+    s: null,
+    n: null,
+    next: function next() {
+      return AsyncFromSyncIteratorContinuation(this.n.apply(this.s, arguments));
+    },
+    "return": function _return(r) {
+      var n = this.s["return"];
+      return void 0 === n ? Promise.resolve({
+        value: r,
+        done: !0
+      }) : AsyncFromSyncIteratorContinuation(n.apply(this.s, arguments));
+    },
+    "throw": function _throw(r) {
+      var n = this.s["return"];
+      return void 0 === n ? Promise.reject(r) : AsyncFromSyncIteratorContinuation(n.apply(this.s, arguments));
+    }
+  }, new AsyncFromSyncIterator(r);
+}
+export { _asyncIterator as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/asyncToGenerator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/asyncToGenerator.js
new file mode 100644
index 0000000..00f29b1
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/asyncToGenerator.js
@@ -0,0 +1,26 @@
+function asyncGeneratorStep(n, t, e, r, o, a, c) {
+  try {
+    var i = n[a](c),
+      u = i.value;
+  } catch (n) {
+    return void e(n);
+  }
+  i.done ? t(u) : Promise.resolve(u).then(r, o);
+}
+function _asyncToGenerator(n) {
+  return function () {
+    var t = this,
+      e = arguments;
+    return new Promise(function (r, o) {
+      var a = n.apply(t, e);
+      function _next(n) {
+        asyncGeneratorStep(a, r, o, _next, _throw, "next", n);
+      }
+      function _throw(n) {
+        asyncGeneratorStep(a, r, o, _next, _throw, "throw", n);
+      }
+      _next(void 0);
+    });
+  };
+}
+export { _asyncToGenerator as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/awaitAsyncGenerator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/awaitAsyncGenerator.js
new file mode 100644
index 0000000..097c88c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/awaitAsyncGenerator.js
@@ -0,0 +1,5 @@
+import OverloadYield from "./OverloadYield.js";
+function _awaitAsyncGenerator(e) {
+  return new OverloadYield(e, 0);
+}
+export { _awaitAsyncGenerator as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/callSuper.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/callSuper.js
new file mode 100644
index 0000000..6d17a4e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/callSuper.js
@@ -0,0 +1,7 @@
+import getPrototypeOf from "./getPrototypeOf.js";
+import isNativeReflectConstruct from "./isNativeReflectConstruct.js";
+import possibleConstructorReturn from "./possibleConstructorReturn.js";
+function _callSuper(t, o, e) {
+  return o = getPrototypeOf(o), possibleConstructorReturn(t, isNativeReflectConstruct() ? Reflect.construct(o, e || [], getPrototypeOf(t).constructor) : o.apply(t, e));
+}
+export { _callSuper as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/checkInRHS.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/checkInRHS.js
new file mode 100644
index 0000000..12f59b4
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/checkInRHS.js
@@ -0,0 +1,6 @@
+import _typeof from "./typeof.js";
+function _checkInRHS(e) {
+  if (Object(e) !== e) throw TypeError("right-hand side of 'in' should be an object, got " + (null !== e ? _typeof(e) : "null"));
+  return e;
+}
+export { _checkInRHS as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/checkPrivateRedeclaration.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/checkPrivateRedeclaration.js
new file mode 100644
index 0000000..e9e6b3b
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/checkPrivateRedeclaration.js
@@ -0,0 +1,4 @@
+function _checkPrivateRedeclaration(e, t) {
+  if (t.has(e)) throw new TypeError("Cannot initialize the same private elements twice on an object");
+}
+export { _checkPrivateRedeclaration as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classApplyDescriptorDestructureSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classApplyDescriptorDestructureSet.js
new file mode 100644
index 0000000..5623419
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classApplyDescriptorDestructureSet.js
@@ -0,0 +1,10 @@
+function _classApplyDescriptorDestructureSet(e, t) {
+  if (t.set) return "__destrObj" in t || (t.__destrObj = {
+    set value(r) {
+      t.set.call(e, r);
+    }
+  }), t.__destrObj;
+  if (!t.writable) throw new TypeError("attempted to set read only private field");
+  return t;
+}
+export { _classApplyDescriptorDestructureSet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classApplyDescriptorGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classApplyDescriptorGet.js
new file mode 100644
index 0000000..b9259d3
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classApplyDescriptorGet.js
@@ -0,0 +1,4 @@
+function _classApplyDescriptorGet(e, t) {
+  return t.get ? t.get.call(e) : t.value;
+}
+export { _classApplyDescriptorGet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classApplyDescriptorSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classApplyDescriptorSet.js
new file mode 100644
index 0000000..d9c4fbd
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classApplyDescriptorSet.js
@@ -0,0 +1,7 @@
+function _classApplyDescriptorSet(e, t, l) {
+  if (t.set) t.set.call(e, l);else {
+    if (!t.writable) throw new TypeError("attempted to set read only private field");
+    t.value = l;
+  }
+}
+export { _classApplyDescriptorSet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classCallCheck.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classCallCheck.js
new file mode 100644
index 0000000..bf97219
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classCallCheck.js
@@ -0,0 +1,4 @@
+function _classCallCheck(a, n) {
+  if (!(a instanceof n)) throw new TypeError("Cannot call a class as a function");
+}
+export { _classCallCheck as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classCheckPrivateStaticAccess.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classCheckPrivateStaticAccess.js
new file mode 100644
index 0000000..366ed05
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classCheckPrivateStaticAccess.js
@@ -0,0 +1,5 @@
+import assertClassBrand from "./assertClassBrand.js";
+function _classCheckPrivateStaticAccess(s, a, r) {
+  return assertClassBrand(a, s, r);
+}
+export { _classCheckPrivateStaticAccess as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classCheckPrivateStaticFieldDescriptor.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classCheckPrivateStaticFieldDescriptor.js
new file mode 100644
index 0000000..844be91
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classCheckPrivateStaticFieldDescriptor.js
@@ -0,0 +1,4 @@
+function _classCheckPrivateStaticFieldDescriptor(t, e) {
+  if (void 0 === t) throw new TypeError("attempted to " + e + " private static field before its declaration");
+}
+export { _classCheckPrivateStaticFieldDescriptor as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classExtractFieldDescriptor.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classExtractFieldDescriptor.js
new file mode 100644
index 0000000..652689d
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classExtractFieldDescriptor.js
@@ -0,0 +1,5 @@
+import classPrivateFieldGet2 from "./classPrivateFieldGet2.js";
+function _classExtractFieldDescriptor(e, t) {
+  return classPrivateFieldGet2(t, e);
+}
+export { _classExtractFieldDescriptor as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classNameTDZError.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classNameTDZError.js
new file mode 100644
index 0000000..68e76ff
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classNameTDZError.js
@@ -0,0 +1,4 @@
+function _classNameTDZError(e) {
+  throw new ReferenceError('Class "' + e + '" cannot be referenced in computed property keys.');
+}
+export { _classNameTDZError as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldDestructureSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldDestructureSet.js
new file mode 100644
index 0000000..9303366
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldDestructureSet.js
@@ -0,0 +1,7 @@
+import classApplyDescriptorDestructureSet from "./classApplyDescriptorDestructureSet.js";
+import classPrivateFieldGet2 from "./classPrivateFieldGet2.js";
+function _classPrivateFieldDestructureSet(e, t) {
+  var r = classPrivateFieldGet2(t, e);
+  return classApplyDescriptorDestructureSet(e, r);
+}
+export { _classPrivateFieldDestructureSet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldGet.js
new file mode 100644
index 0000000..ce7ebcb
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldGet.js
@@ -0,0 +1,7 @@
+import classApplyDescriptorGet from "./classApplyDescriptorGet.js";
+import classPrivateFieldGet2 from "./classPrivateFieldGet2.js";
+function _classPrivateFieldGet(e, t) {
+  var r = classPrivateFieldGet2(t, e);
+  return classApplyDescriptorGet(e, r);
+}
+export { _classPrivateFieldGet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldGet2.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldGet2.js
new file mode 100644
index 0000000..4aa3da6
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldGet2.js
@@ -0,0 +1,5 @@
+import assertClassBrand from "./assertClassBrand.js";
+function _classPrivateFieldGet2(s, a) {
+  return s.get(assertClassBrand(s, a));
+}
+export { _classPrivateFieldGet2 as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldInitSpec.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldInitSpec.js
new file mode 100644
index 0000000..5dcdbe0
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldInitSpec.js
@@ -0,0 +1,5 @@
+import checkPrivateRedeclaration from "./checkPrivateRedeclaration.js";
+function _classPrivateFieldInitSpec(e, t, a) {
+  checkPrivateRedeclaration(e, t), t.set(e, a);
+}
+export { _classPrivateFieldInitSpec as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldLooseBase.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldLooseBase.js
new file mode 100644
index 0000000..4bd662c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldLooseBase.js
@@ -0,0 +1,5 @@
+function _classPrivateFieldBase(e, t) {
+  if (!{}.hasOwnProperty.call(e, t)) throw new TypeError("attempted to use private field on non-instance");
+  return e;
+}
+export { _classPrivateFieldBase as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldLooseKey.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldLooseKey.js
new file mode 100644
index 0000000..90d2193
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldLooseKey.js
@@ -0,0 +1,5 @@
+var id = 0;
+function _classPrivateFieldKey(e) {
+  return "__private_" + id++ + "_" + e;
+}
+export { _classPrivateFieldKey as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldSet.js
new file mode 100644
index 0000000..b5161bd
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldSet.js
@@ -0,0 +1,7 @@
+import classApplyDescriptorSet from "./classApplyDescriptorSet.js";
+import classPrivateFieldGet2 from "./classPrivateFieldGet2.js";
+function _classPrivateFieldSet(e, t, r) {
+  var s = classPrivateFieldGet2(t, e);
+  return classApplyDescriptorSet(e, s, r), r;
+}
+export { _classPrivateFieldSet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldSet2.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldSet2.js
new file mode 100644
index 0000000..337b01a
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateFieldSet2.js
@@ -0,0 +1,5 @@
+import assertClassBrand from "./assertClassBrand.js";
+function _classPrivateFieldSet2(s, a, r) {
+  return s.set(assertClassBrand(s, a), r), r;
+}
+export { _classPrivateFieldSet2 as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateGetter.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateGetter.js
new file mode 100644
index 0000000..ff3e985
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateGetter.js
@@ -0,0 +1,5 @@
+import assertClassBrand from "./assertClassBrand.js";
+function _classPrivateGetter(s, r, a) {
+  return a(assertClassBrand(s, r));
+}
+export { _classPrivateGetter as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateMethodGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateMethodGet.js
new file mode 100644
index 0000000..4832fc6
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateMethodGet.js
@@ -0,0 +1,5 @@
+import assertClassBrand from "./assertClassBrand.js";
+function _classPrivateMethodGet(s, a, r) {
+  return assertClassBrand(a, s), r;
+}
+export { _classPrivateMethodGet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateMethodInitSpec.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateMethodInitSpec.js
new file mode 100644
index 0000000..61e23e2
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateMethodInitSpec.js
@@ -0,0 +1,5 @@
+import checkPrivateRedeclaration from "./checkPrivateRedeclaration.js";
+function _classPrivateMethodInitSpec(e, a) {
+  checkPrivateRedeclaration(e, a), a.add(e);
+}
+export { _classPrivateMethodInitSpec as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateMethodSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateMethodSet.js
new file mode 100644
index 0000000..d181b51
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateMethodSet.js
@@ -0,0 +1,4 @@
+function _classPrivateMethodSet() {
+  throw new TypeError("attempted to reassign private method");
+}
+export { _classPrivateMethodSet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateSetter.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateSetter.js
new file mode 100644
index 0000000..9a80d59
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classPrivateSetter.js
@@ -0,0 +1,5 @@
+import assertClassBrand from "./assertClassBrand.js";
+function _classPrivateSetter(s, r, a, t) {
+  return r(assertClassBrand(s, a), t), t;
+}
+export { _classPrivateSetter as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateFieldDestructureSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateFieldDestructureSet.js
new file mode 100644
index 0000000..747e639
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateFieldDestructureSet.js
@@ -0,0 +1,7 @@
+import classApplyDescriptorDestructureSet from "./classApplyDescriptorDestructureSet.js";
+import assertClassBrand from "./assertClassBrand.js";
+import classCheckPrivateStaticFieldDescriptor from "./classCheckPrivateStaticFieldDescriptor.js";
+function _classStaticPrivateFieldDestructureSet(t, r, s) {
+  return assertClassBrand(r, t), classCheckPrivateStaticFieldDescriptor(s, "set"), classApplyDescriptorDestructureSet(t, s);
+}
+export { _classStaticPrivateFieldDestructureSet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateFieldSpecGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateFieldSpecGet.js
new file mode 100644
index 0000000..23684b7
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateFieldSpecGet.js
@@ -0,0 +1,7 @@
+import classApplyDescriptorGet from "./classApplyDescriptorGet.js";
+import assertClassBrand from "./assertClassBrand.js";
+import classCheckPrivateStaticFieldDescriptor from "./classCheckPrivateStaticFieldDescriptor.js";
+function _classStaticPrivateFieldSpecGet(t, s, r) {
+  return assertClassBrand(s, t), classCheckPrivateStaticFieldDescriptor(r, "get"), classApplyDescriptorGet(t, r);
+}
+export { _classStaticPrivateFieldSpecGet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateFieldSpecSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateFieldSpecSet.js
new file mode 100644
index 0000000..3a31468
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateFieldSpecSet.js
@@ -0,0 +1,7 @@
+import classApplyDescriptorSet from "./classApplyDescriptorSet.js";
+import assertClassBrand from "./assertClassBrand.js";
+import classCheckPrivateStaticFieldDescriptor from "./classCheckPrivateStaticFieldDescriptor.js";
+function _classStaticPrivateFieldSpecSet(s, t, r, e) {
+  return assertClassBrand(t, s), classCheckPrivateStaticFieldDescriptor(r, "set"), classApplyDescriptorSet(s, r, e), e;
+}
+export { _classStaticPrivateFieldSpecSet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateMethodGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateMethodGet.js
new file mode 100644
index 0000000..047b177
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateMethodGet.js
@@ -0,0 +1,5 @@
+import assertClassBrand from "./assertClassBrand.js";
+function _classStaticPrivateMethodGet(s, a, t) {
+  return assertClassBrand(a, s), t;
+}
+export { _classStaticPrivateMethodGet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateMethodSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateMethodSet.js
new file mode 100644
index 0000000..a61ae63
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/classStaticPrivateMethodSet.js
@@ -0,0 +1,4 @@
+function _classStaticPrivateMethodSet() {
+  throw new TypeError("attempted to set read only static private field");
+}
+export { _classStaticPrivateMethodSet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/construct.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/construct.js
new file mode 100644
index 0000000..91609ff
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/construct.js
@@ -0,0 +1,10 @@
+import isNativeReflectConstruct from "./isNativeReflectConstruct.js";
+import setPrototypeOf from "./setPrototypeOf.js";
+function _construct(t, e, r) {
+  if (isNativeReflectConstruct()) return Reflect.construct.apply(null, arguments);
+  var o = [null];
+  o.push.apply(o, e);
+  var p = new (t.bind.apply(t, o))();
+  return r && setPrototypeOf(p, r.prototype), p;
+}
+export { _construct as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createClass.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createClass.js
new file mode 100644
index 0000000..9b17851
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createClass.js
@@ -0,0 +1,13 @@
+import toPropertyKey from "./toPropertyKey.js";
+function _defineProperties(e, r) {
+  for (var t = 0; t < r.length; t++) {
+    var o = r[t];
+    o.enumerable = o.enumerable || !1, o.configurable = !0, "value" in o && (o.writable = !0), Object.defineProperty(e, toPropertyKey(o.key), o);
+  }
+}
+function _createClass(e, r, t) {
+  return r && _defineProperties(e.prototype, r), t && _defineProperties(e, t), Object.defineProperty(e, "prototype", {
+    writable: !1
+  }), e;
+}
+export { _createClass as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createForOfIteratorHelper.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createForOfIteratorHelper.js
new file mode 100644
index 0000000..93b97f9
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createForOfIteratorHelper.js
@@ -0,0 +1,50 @@
+import unsupportedIterableToArray from "./unsupportedIterableToArray.js";
+function _createForOfIteratorHelper(r, e) {
+  var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
+  if (!t) {
+    if (Array.isArray(r) || (t = unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) {
+      t && (r = t);
+      var _n = 0,
+        F = function F() {};
+      return {
+        s: F,
+        n: function n() {
+          return _n >= r.length ? {
+            done: !0
+          } : {
+            done: !1,
+            value: r[_n++]
+          };
+        },
+        e: function e(r) {
+          throw r;
+        },
+        f: F
+      };
+    }
+    throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+  }
+  var o,
+    a = !0,
+    u = !1;
+  return {
+    s: function s() {
+      t = t.call(r);
+    },
+    n: function n() {
+      var r = t.next();
+      return a = r.done, r;
+    },
+    e: function e(r) {
+      u = !0, o = r;
+    },
+    f: function f() {
+      try {
+        a || null == t["return"] || t["return"]();
+      } finally {
+        if (u) throw o;
+      }
+    }
+  };
+}
+export { _createForOfIteratorHelper as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createForOfIteratorHelperLoose.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createForOfIteratorHelperLoose.js
new file mode 100644
index 0000000..3deaae4
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createForOfIteratorHelperLoose.js
@@ -0,0 +1,19 @@
+import unsupportedIterableToArray from "./unsupportedIterableToArray.js";
+function _createForOfIteratorHelperLoose(r, e) {
+  var t = "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
+  if (t) return (t = t.call(r)).next.bind(t);
+  if (Array.isArray(r) || (t = unsupportedIterableToArray(r)) || e && r && "number" == typeof r.length) {
+    t && (r = t);
+    var o = 0;
+    return function () {
+      return o >= r.length ? {
+        done: !0
+      } : {
+        done: !1,
+        value: r[o++]
+      };
+    };
+  }
+  throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+}
+export { _createForOfIteratorHelperLoose as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createSuper.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createSuper.js
new file mode 100644
index 0000000..dfabf71
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/createSuper.js
@@ -0,0 +1,16 @@
+import getPrototypeOf from "./getPrototypeOf.js";
+import isNativeReflectConstruct from "./isNativeReflectConstruct.js";
+import possibleConstructorReturn from "./possibleConstructorReturn.js";
+function _createSuper(t) {
+  var r = isNativeReflectConstruct();
+  return function () {
+    var e,
+      o = getPrototypeOf(t);
+    if (r) {
+      var s = getPrototypeOf(this).constructor;
+      e = Reflect.construct(o, arguments, s);
+    } else e = o.apply(this, arguments);
+    return possibleConstructorReturn(this, e);
+  };
+}
+export { _createSuper as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/decorate.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/decorate.js
new file mode 100644
index 0000000..f76b6a6
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/decorate.js
@@ -0,0 +1,250 @@
+import toArray from "./toArray.js";
+import toPropertyKey from "./toPropertyKey.js";
+function _decorate(e, r, t, i) {
+  var o = _getDecoratorsApi();
+  if (i) for (var n = 0; n < i.length; n++) o = i[n](o);
+  var s = r(function (e) {
+      o.initializeInstanceElements(e, a.elements);
+    }, t),
+    a = o.decorateClass(_coalesceClassElements(s.d.map(_createElementDescriptor)), e);
+  return o.initializeClassElements(s.F, a.elements), o.runClassFinishers(s.F, a.finishers);
+}
+function _getDecoratorsApi() {
+  _getDecoratorsApi = function _getDecoratorsApi() {
+    return e;
+  };
+  var e = {
+    elementsDefinitionOrder: [["method"], ["field"]],
+    initializeInstanceElements: function initializeInstanceElements(e, r) {
+      ["method", "field"].forEach(function (t) {
+        r.forEach(function (r) {
+          r.kind === t && "own" === r.placement && this.defineClassElement(e, r);
+        }, this);
+      }, this);
+    },
+    initializeClassElements: function initializeClassElements(e, r) {
+      var t = e.prototype;
+      ["method", "field"].forEach(function (i) {
+        r.forEach(function (r) {
+          var o = r.placement;
+          if (r.kind === i && ("static" === o || "prototype" === o)) {
+            var n = "static" === o ? e : t;
+            this.defineClassElement(n, r);
+          }
+        }, this);
+      }, this);
+    },
+    defineClassElement: function defineClassElement(e, r) {
+      var t = r.descriptor;
+      if ("field" === r.kind) {
+        var i = r.initializer;
+        t = {
+          enumerable: t.enumerable,
+          writable: t.writable,
+          configurable: t.configurable,
+          value: void 0 === i ? void 0 : i.call(e)
+        };
+      }
+      Object.defineProperty(e, r.key, t);
+    },
+    decorateClass: function decorateClass(e, r) {
+      var t = [],
+        i = [],
+        o = {
+          "static": [],
+          prototype: [],
+          own: []
+        };
+      if (e.forEach(function (e) {
+        this.addElementPlacement(e, o);
+      }, this), e.forEach(function (e) {
+        if (!_hasDecorators(e)) return t.push(e);
+        var r = this.decorateElement(e, o);
+        t.push(r.element), t.push.apply(t, r.extras), i.push.apply(i, r.finishers);
+      }, this), !r) return {
+        elements: t,
+        finishers: i
+      };
+      var n = this.decorateConstructor(t, r);
+      return i.push.apply(i, n.finishers), n.finishers = i, n;
+    },
+    addElementPlacement: function addElementPlacement(e, r, t) {
+      var i = r[e.placement];
+      if (!t && -1 !== i.indexOf(e.key)) throw new TypeError("Duplicated element (" + e.key + ")");
+      i.push(e.key);
+    },
+    decorateElement: function decorateElement(e, r) {
+      for (var t = [], i = [], o = e.decorators, n = o.length - 1; n >= 0; n--) {
+        var s = r[e.placement];
+        s.splice(s.indexOf(e.key), 1);
+        var a = this.fromElementDescriptor(e),
+          l = this.toElementFinisherExtras((0, o[n])(a) || a);
+        e = l.element, this.addElementPlacement(e, r), l.finisher && i.push(l.finisher);
+        var c = l.extras;
+        if (c) {
+          for (var p = 0; p < c.length; p++) this.addElementPlacement(c[p], r);
+          t.push.apply(t, c);
+        }
+      }
+      return {
+        element: e,
+        finishers: i,
+        extras: t
+      };
+    },
+    decorateConstructor: function decorateConstructor(e, r) {
+      for (var t = [], i = r.length - 1; i >= 0; i--) {
+        var o = this.fromClassDescriptor(e),
+          n = this.toClassDescriptor((0, r[i])(o) || o);
+        if (void 0 !== n.finisher && t.push(n.finisher), void 0 !== n.elements) {
+          e = n.elements;
+          for (var s = 0; s < e.length - 1; s++) for (var a = s + 1; a < e.length; a++) if (e[s].key === e[a].key && e[s].placement === e[a].placement) throw new TypeError("Duplicated element (" + e[s].key + ")");
+        }
+      }
+      return {
+        elements: e,
+        finishers: t
+      };
+    },
+    fromElementDescriptor: function fromElementDescriptor(e) {
+      var r = {
+        kind: e.kind,
+        key: e.key,
+        placement: e.placement,
+        descriptor: e.descriptor
+      };
+      return Object.defineProperty(r, Symbol.toStringTag, {
+        value: "Descriptor",
+        configurable: !0
+      }), "field" === e.kind && (r.initializer = e.initializer), r;
+    },
+    toElementDescriptors: function toElementDescriptors(e) {
+      if (void 0 !== e) return toArray(e).map(function (e) {
+        var r = this.toElementDescriptor(e);
+        return this.disallowProperty(e, "finisher", "An element descriptor"), this.disallowProperty(e, "extras", "An element descriptor"), r;
+      }, this);
+    },
+    toElementDescriptor: function toElementDescriptor(e) {
+      var r = e.kind + "";
+      if ("method" !== r && "field" !== r) throw new TypeError('An element descriptor\'s .kind property must be either "method" or "field", but a decorator created an element descriptor with .kind "' + r + '"');
+      var t = toPropertyKey(e.key),
+        i = e.placement + "";
+      if ("static" !== i && "prototype" !== i && "own" !== i) throw new TypeError('An element descriptor\'s .placement property must be one of "static", "prototype" or "own", but a decorator created an element descriptor with .placement "' + i + '"');
+      var o = e.descriptor;
+      this.disallowProperty(e, "elements", "An element descriptor");
+      var n = {
+        kind: r,
+        key: t,
+        placement: i,
+        descriptor: Object.assign({}, o)
+      };
+      return "field" !== r ? this.disallowProperty(e, "initializer", "A method descriptor") : (this.disallowProperty(o, "get", "The property descriptor of a field descriptor"), this.disallowProperty(o, "set", "The property descriptor of a field descriptor"), this.disallowProperty(o, "value", "The property descriptor of a field descriptor"), n.initializer = e.initializer), n;
+    },
+    toElementFinisherExtras: function toElementFinisherExtras(e) {
+      return {
+        element: this.toElementDescriptor(e),
+        finisher: _optionalCallableProperty(e, "finisher"),
+        extras: this.toElementDescriptors(e.extras)
+      };
+    },
+    fromClassDescriptor: function fromClassDescriptor(e) {
+      var r = {
+        kind: "class",
+        elements: e.map(this.fromElementDescriptor, this)
+      };
+      return Object.defineProperty(r, Symbol.toStringTag, {
+        value: "Descriptor",
+        configurable: !0
+      }), r;
+    },
+    toClassDescriptor: function toClassDescriptor(e) {
+      var r = e.kind + "";
+      if ("class" !== r) throw new TypeError('A class descriptor\'s .kind property must be "class", but a decorator created a class descriptor with .kind "' + r + '"');
+      this.disallowProperty(e, "key", "A class descriptor"), this.disallowProperty(e, "placement", "A class descriptor"), this.disallowProperty(e, "descriptor", "A class descriptor"), this.disallowProperty(e, "initializer", "A class descriptor"), this.disallowProperty(e, "extras", "A class descriptor");
+      var t = _optionalCallableProperty(e, "finisher");
+      return {
+        elements: this.toElementDescriptors(e.elements),
+        finisher: t
+      };
+    },
+    runClassFinishers: function runClassFinishers(e, r) {
+      for (var t = 0; t < r.length; t++) {
+        var i = (0, r[t])(e);
+        if (void 0 !== i) {
+          if ("function" != typeof i) throw new TypeError("Finishers must return a constructor.");
+          e = i;
+        }
+      }
+      return e;
+    },
+    disallowProperty: function disallowProperty(e, r, t) {
+      if (void 0 !== e[r]) throw new TypeError(t + " can't have a ." + r + " property.");
+    }
+  };
+  return e;
+}
+function _createElementDescriptor(e) {
+  var r,
+    t = toPropertyKey(e.key);
+  "method" === e.kind ? r = {
+    value: e.value,
+    writable: !0,
+    configurable: !0,
+    enumerable: !1
+  } : "get" === e.kind ? r = {
+    get: e.value,
+    configurable: !0,
+    enumerable: !1
+  } : "set" === e.kind ? r = {
+    set: e.value,
+    configurable: !0,
+    enumerable: !1
+  } : "field" === e.kind && (r = {
+    configurable: !0,
+    writable: !0,
+    enumerable: !0
+  });
+  var i = {
+    kind: "field" === e.kind ? "field" : "method",
+    key: t,
+    placement: e["static"] ? "static" : "field" === e.kind ? "own" : "prototype",
+    descriptor: r
+  };
+  return e.decorators && (i.decorators = e.decorators), "field" === e.kind && (i.initializer = e.value), i;
+}
+function _coalesceGetterSetter(e, r) {
+  void 0 !== e.descriptor.get ? r.descriptor.get = e.descriptor.get : r.descriptor.set = e.descriptor.set;
+}
+function _coalesceClassElements(e) {
+  for (var r = [], isSameElement = function isSameElement(e) {
+      return "method" === e.kind && e.key === o.key && e.placement === o.placement;
+    }, t = 0; t < e.length; t++) {
+    var i,
+      o = e[t];
+    if ("method" === o.kind && (i = r.find(isSameElement))) {
+      if (_isDataDescriptor(o.descriptor) || _isDataDescriptor(i.descriptor)) {
+        if (_hasDecorators(o) || _hasDecorators(i)) throw new ReferenceError("Duplicated methods (" + o.key + ") can't be decorated.");
+        i.descriptor = o.descriptor;
+      } else {
+        if (_hasDecorators(o)) {
+          if (_hasDecorators(i)) throw new ReferenceError("Decorators can't be placed on different accessors with for the same property (" + o.key + ").");
+          i.decorators = o.decorators;
+        }
+        _coalesceGetterSetter(o, i);
+      }
+    } else r.push(o);
+  }
+  return r;
+}
+function _hasDecorators(e) {
+  return e.decorators && e.decorators.length;
+}
+function _isDataDescriptor(e) {
+  return void 0 !== e && !(void 0 === e.value && void 0 === e.writable);
+}
+function _optionalCallableProperty(e, r) {
+  var t = e[r];
+  if (void 0 !== t && "function" != typeof t) throw new TypeError("Expected '" + r + "' to be a function");
+  return t;
+}
+export { _decorate as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defaults.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defaults.js
new file mode 100644
index 0000000..d3041a3
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defaults.js
@@ -0,0 +1,9 @@
+function _defaults(e, r) {
+  for (var t = Object.getOwnPropertyNames(r), o = 0; o < t.length; o++) {
+    var n = t[o],
+      a = Object.getOwnPropertyDescriptor(r, n);
+    a && a.configurable && void 0 === e[n] && Object.defineProperty(e, n, a);
+  }
+  return e;
+}
+export { _defaults as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defineAccessor.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defineAccessor.js
new file mode 100644
index 0000000..a8292de
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defineAccessor.js
@@ -0,0 +1,8 @@
+function _defineAccessor(e, r, n, t) {
+  var c = {
+    configurable: !0,
+    enumerable: !0
+  };
+  return c[e] = t, Object.defineProperty(r, n, c);
+}
+export { _defineAccessor as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defineEnumerableProperties.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defineEnumerableProperties.js
new file mode 100644
index 0000000..3d31d98
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defineEnumerableProperties.js
@@ -0,0 +1,12 @@
+function _defineEnumerableProperties(e, r) {
+  for (var t in r) {
+    var n = r[t];
+    n.configurable = n.enumerable = !0, "value" in n && (n.writable = !0), Object.defineProperty(e, t, n);
+  }
+  if (Object.getOwnPropertySymbols) for (var a = Object.getOwnPropertySymbols(r), b = 0; b < a.length; b++) {
+    var i = a[b];
+    (n = r[i]).configurable = n.enumerable = !0, "value" in n && (n.writable = !0), Object.defineProperty(e, i, n);
+  }
+  return e;
+}
+export { _defineEnumerableProperties as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defineProperty.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defineProperty.js
new file mode 100644
index 0000000..05ec32b
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/defineProperty.js
@@ -0,0 +1,10 @@
+import toPropertyKey from "./toPropertyKey.js";
+function _defineProperty(e, r, t) {
+  return (r = toPropertyKey(r)) in e ? Object.defineProperty(e, r, {
+    value: t,
+    enumerable: !0,
+    configurable: !0,
+    writable: !0
+  }) : e[r] = t, e;
+}
+export { _defineProperty as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/dispose.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/dispose.js
new file mode 100644
index 0000000..a87ab20
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/dispose.js
@@ -0,0 +1,28 @@
+function dispose_SuppressedError(r, e) {
+  return "undefined" != typeof SuppressedError ? dispose_SuppressedError = SuppressedError : (dispose_SuppressedError = function dispose_SuppressedError(r, e) {
+    this.suppressed = e, this.error = r, this.stack = Error().stack;
+  }, dispose_SuppressedError.prototype = Object.create(Error.prototype, {
+    constructor: {
+      value: dispose_SuppressedError,
+      writable: !0,
+      configurable: !0
+    }
+  })), new dispose_SuppressedError(r, e);
+}
+function _dispose(r, e, s) {
+  function next() {
+    for (; r.length > 0;) try {
+      var o = r.pop(),
+        p = o.d.call(o.v);
+      if (o.a) return Promise.resolve(p).then(next, err);
+    } catch (r) {
+      return err(r);
+    }
+    if (s) throw e;
+  }
+  function err(r) {
+    return e = s ? new dispose_SuppressedError(e, r) : r, s = !0, next();
+  }
+  return next();
+}
+export { _dispose as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/extends.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/extends.js
new file mode 100644
index 0000000..53f118c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/extends.js
@@ -0,0 +1,10 @@
+function _extends() {
+  return _extends = Object.assign ? Object.assign.bind() : function (n) {
+    for (var e = 1; e < arguments.length; e++) {
+      var t = arguments[e];
+      for (var r in t) ({}).hasOwnProperty.call(t, r) && (n[r] = t[r]);
+    }
+    return n;
+  }, _extends.apply(null, arguments);
+}
+export { _extends as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/get.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/get.js
new file mode 100644
index 0000000..8124bc0
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/get.js
@@ -0,0 +1,11 @@
+import superPropBase from "./superPropBase.js";
+function _get() {
+  return _get = "undefined" != typeof Reflect && Reflect.get ? Reflect.get.bind() : function (e, t, r) {
+    var p = superPropBase(e, t);
+    if (p) {
+      var n = Object.getOwnPropertyDescriptor(p, t);
+      return n.get ? n.get.call(arguments.length < 3 ? e : r) : n.value;
+    }
+  }, _get.apply(null, arguments);
+}
+export { _get as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/getPrototypeOf.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/getPrototypeOf.js
new file mode 100644
index 0000000..9073c45
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/getPrototypeOf.js
@@ -0,0 +1,6 @@
+function _getPrototypeOf(t) {
+  return _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function (t) {
+    return t.__proto__ || Object.getPrototypeOf(t);
+  }, _getPrototypeOf(t);
+}
+export { _getPrototypeOf as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/identity.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/identity.js
new file mode 100644
index 0000000..6b564ac
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/identity.js
@@ -0,0 +1,4 @@
+function _identity(t) {
+  return t;
+}
+export { _identity as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/importDeferProxy.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/importDeferProxy.js
new file mode 100644
index 0000000..6d35b52
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/importDeferProxy.js
@@ -0,0 +1,27 @@
+function _importDeferProxy(e) {
+  var t = null,
+    constValue = function constValue(e) {
+      return function () {
+        return e;
+      };
+    },
+    proxy = function proxy(r) {
+      return function (n, o, f) {
+        return null === t && (t = e()), r(t, o, f);
+      };
+    };
+  return new Proxy({}, {
+    defineProperty: constValue(!1),
+    deleteProperty: constValue(!1),
+    get: proxy(Reflect.get),
+    getOwnPropertyDescriptor: proxy(Reflect.getOwnPropertyDescriptor),
+    getPrototypeOf: constValue(null),
+    isExtensible: constValue(!1),
+    has: proxy(Reflect.has),
+    ownKeys: proxy(Reflect.ownKeys),
+    preventExtensions: constValue(!0),
+    set: constValue(!1),
+    setPrototypeOf: constValue(!1)
+  });
+}
+export { _importDeferProxy as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/inherits.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/inherits.js
new file mode 100644
index 0000000..78f6e4e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/inherits.js
@@ -0,0 +1,14 @@
+import setPrototypeOf from "./setPrototypeOf.js";
+function _inherits(t, e) {
+  if ("function" != typeof e && null !== e) throw new TypeError("Super expression must either be null or a function");
+  t.prototype = Object.create(e && e.prototype, {
+    constructor: {
+      value: t,
+      writable: !0,
+      configurable: !0
+    }
+  }), Object.defineProperty(t, "prototype", {
+    writable: !1
+  }), e && setPrototypeOf(t, e);
+}
+export { _inherits as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/inheritsLoose.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/inheritsLoose.js
new file mode 100644
index 0000000..0bd1330
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/inheritsLoose.js
@@ -0,0 +1,5 @@
+import setPrototypeOf from "./setPrototypeOf.js";
+function _inheritsLoose(t, o) {
+  t.prototype = Object.create(o.prototype), t.prototype.constructor = t, setPrototypeOf(t, o);
+}
+export { _inheritsLoose as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/initializerDefineProperty.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/initializerDefineProperty.js
new file mode 100644
index 0000000..68bcc2c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/initializerDefineProperty.js
@@ -0,0 +1,9 @@
+function _initializerDefineProperty(e, i, r, l) {
+  r && Object.defineProperty(e, i, {
+    enumerable: r.enumerable,
+    configurable: r.configurable,
+    writable: r.writable,
+    value: r.initializer ? r.initializer.call(l) : void 0
+  });
+}
+export { _initializerDefineProperty as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/initializerWarningHelper.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/initializerWarningHelper.js
new file mode 100644
index 0000000..0a658e3
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/initializerWarningHelper.js
@@ -0,0 +1,4 @@
+function _initializerWarningHelper(r, e) {
+  throw Error("Decorating class property failed. Please ensure that transform-class-properties is enabled and runs after the decorators transform.");
+}
+export { _initializerWarningHelper as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/instanceof.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/instanceof.js
new file mode 100644
index 0000000..316539e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/instanceof.js
@@ -0,0 +1,4 @@
+function _instanceof(n, e) {
+  return null != e && "undefined" != typeof Symbol && e[Symbol.hasInstance] ? !!e[Symbol.hasInstance](n) : n instanceof e;
+}
+export { _instanceof as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/interopRequireDefault.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/interopRequireDefault.js
new file mode 100644
index 0000000..365d248
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/interopRequireDefault.js
@@ -0,0 +1,6 @@
+function _interopRequireDefault(e) {
+  return e && e.__esModule ? e : {
+    "default": e
+  };
+}
+export { _interopRequireDefault as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/interopRequireWildcard.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/interopRequireWildcard.js
new file mode 100644
index 0000000..ed9ca31
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/interopRequireWildcard.js
@@ -0,0 +1,22 @@
+import _typeof from "./typeof.js";
+function _interopRequireWildcard(e, t) {
+  if ("function" == typeof WeakMap) var r = new WeakMap(),
+    n = new WeakMap();
+  return (_interopRequireWildcard = function _interopRequireWildcard(e, t) {
+    if (!t && e && e.__esModule) return e;
+    var o,
+      i,
+      f = {
+        __proto__: null,
+        "default": e
+      };
+    if (null === e || "object" != _typeof(e) && "function" != typeof e) return f;
+    if (o = t ? n : r) {
+      if (o.has(e)) return o.get(e);
+      o.set(e, f);
+    }
+    for (var _t in e) "default" !== _t && {}.hasOwnProperty.call(e, _t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t)) && (i.get || i.set) ? o(f, _t, i) : f[_t] = e[_t]);
+    return f;
+  })(e, t);
+}
+export { _interopRequireWildcard as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/isNativeFunction.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/isNativeFunction.js
new file mode 100644
index 0000000..0cfe276
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/isNativeFunction.js
@@ -0,0 +1,8 @@
+function _isNativeFunction(t) {
+  try {
+    return -1 !== Function.toString.call(t).indexOf("[native code]");
+  } catch (n) {
+    return "function" == typeof t;
+  }
+}
+export { _isNativeFunction as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/isNativeReflectConstruct.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/isNativeReflectConstruct.js
new file mode 100644
index 0000000..0eb5e39
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/isNativeReflectConstruct.js
@@ -0,0 +1,9 @@
+function _isNativeReflectConstruct() {
+  try {
+    var t = !Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
+  } catch (t) {}
+  return (_isNativeReflectConstruct = function _isNativeReflectConstruct() {
+    return !!t;
+  })();
+}
+export { _isNativeReflectConstruct as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/iterableToArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/iterableToArray.js
new file mode 100644
index 0000000..b7de339
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/iterableToArray.js
@@ -0,0 +1,4 @@
+function _iterableToArray(r) {
+  if ("undefined" != typeof Symbol && null != r[Symbol.iterator] || null != r["@@iterator"]) return Array.from(r);
+}
+export { _iterableToArray as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/iterableToArrayLimit.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/iterableToArrayLimit.js
new file mode 100644
index 0000000..473f067
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/iterableToArrayLimit.js
@@ -0,0 +1,28 @@
+function _iterableToArrayLimit(r, l) {
+  var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
+  if (null != t) {
+    var e,
+      n,
+      i,
+      u,
+      a = [],
+      f = !0,
+      o = !1;
+    try {
+      if (i = (t = t.call(r)).next, 0 === l) {
+        if (Object(t) !== t) return;
+        f = !1;
+      } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0);
+    } catch (r) {
+      o = !0, n = r;
+    } finally {
+      try {
+        if (!f && null != t["return"] && (u = t["return"](), Object(u) !== u)) return;
+      } finally {
+        if (o) throw n;
+      }
+    }
+    return a;
+  }
+}
+export { _iterableToArrayLimit as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/jsx.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/jsx.js
new file mode 100644
index 0000000..a120e5b
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/jsx.js
@@ -0,0 +1,22 @@
+var REACT_ELEMENT_TYPE;
+function _createRawReactElement(e, r, E, l) {
+  REACT_ELEMENT_TYPE || (REACT_ELEMENT_TYPE = "function" == typeof Symbol && Symbol["for"] && Symbol["for"]("react.element") || 60103);
+  var o = e && e.defaultProps,
+    n = arguments.length - 3;
+  if (r || 0 === n || (r = {
+    children: void 0
+  }), 1 === n) r.children = l;else if (n > 1) {
+    for (var t = Array(n), f = 0; f < n; f++) t[f] = arguments[f + 3];
+    r.children = t;
+  }
+  if (r && o) for (var i in o) void 0 === r[i] && (r[i] = o[i]);else r || (r = o || {});
+  return {
+    $$typeof: REACT_ELEMENT_TYPE,
+    type: e,
+    key: void 0 === E ? null : "" + E,
+    ref: null,
+    props: r,
+    _owner: null
+  };
+}
+export { _createRawReactElement as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/maybeArrayLike.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/maybeArrayLike.js
new file mode 100644
index 0000000..527c682
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/maybeArrayLike.js
@@ -0,0 +1,9 @@
+import arrayLikeToArray from "./arrayLikeToArray.js";
+function _maybeArrayLike(r, a, e) {
+  if (a && !Array.isArray(a) && "number" == typeof a.length) {
+    var y = a.length;
+    return arrayLikeToArray(a, void 0 !== e && e < y ? e : y);
+  }
+  return r(a, e);
+}
+export { _maybeArrayLike as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/newArrowCheck.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/newArrowCheck.js
new file mode 100644
index 0000000..5f70e0d
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/newArrowCheck.js
@@ -0,0 +1,4 @@
+function _newArrowCheck(n, r) {
+  if (n !== r) throw new TypeError("Cannot instantiate an arrow function");
+}
+export { _newArrowCheck as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/nonIterableRest.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/nonIterableRest.js
new file mode 100644
index 0000000..9050250
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/nonIterableRest.js
@@ -0,0 +1,4 @@
+function _nonIterableRest() {
+  throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+}
+export { _nonIterableRest as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/nonIterableSpread.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/nonIterableSpread.js
new file mode 100644
index 0000000..fb03235
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/nonIterableSpread.js
@@ -0,0 +1,4 @@
+function _nonIterableSpread() {
+  throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+}
+export { _nonIterableSpread as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/nullishReceiverError.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/nullishReceiverError.js
new file mode 100644
index 0000000..d8c3060
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/nullishReceiverError.js
@@ -0,0 +1,4 @@
+function _nullishReceiverError(r) {
+  throw new TypeError("Cannot set property of null or undefined.");
+}
+export { _nullishReceiverError as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectDestructuringEmpty.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectDestructuringEmpty.js
new file mode 100644
index 0000000..a92eac8
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectDestructuringEmpty.js
@@ -0,0 +1,4 @@
+function _objectDestructuringEmpty(t) {
+  if (null == t) throw new TypeError("Cannot destructure " + t);
+}
+export { _objectDestructuringEmpty as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectSpread.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectSpread.js
new file mode 100644
index 0000000..0f82f06
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectSpread.js
@@ -0,0 +1,14 @@
+import defineProperty from "./defineProperty.js";
+function _objectSpread(e) {
+  for (var r = 1; r < arguments.length; r++) {
+    var t = null != arguments[r] ? Object(arguments[r]) : {},
+      o = Object.keys(t);
+    "function" == typeof Object.getOwnPropertySymbols && o.push.apply(o, Object.getOwnPropertySymbols(t).filter(function (e) {
+      return Object.getOwnPropertyDescriptor(t, e).enumerable;
+    })), o.forEach(function (r) {
+      defineProperty(e, r, t[r]);
+    });
+  }
+  return e;
+}
+export { _objectSpread as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectSpread2.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectSpread2.js
new file mode 100644
index 0000000..0035bc7
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectSpread2.js
@@ -0,0 +1,23 @@
+import defineProperty from "./defineProperty.js";
+function ownKeys(e, r) {
+  var t = Object.keys(e);
+  if (Object.getOwnPropertySymbols) {
+    var o = Object.getOwnPropertySymbols(e);
+    r && (o = o.filter(function (r) {
+      return Object.getOwnPropertyDescriptor(e, r).enumerable;
+    })), t.push.apply(t, o);
+  }
+  return t;
+}
+function _objectSpread2(e) {
+  for (var r = 1; r < arguments.length; r++) {
+    var t = null != arguments[r] ? arguments[r] : {};
+    r % 2 ? ownKeys(Object(t), !0).forEach(function (r) {
+      defineProperty(e, r, t[r]);
+    }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) {
+      Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r));
+    });
+  }
+  return e;
+}
+export { _objectSpread2 as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectWithoutProperties.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectWithoutProperties.js
new file mode 100644
index 0000000..598fb9a
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectWithoutProperties.js
@@ -0,0 +1,13 @@
+import objectWithoutPropertiesLoose from "./objectWithoutPropertiesLoose.js";
+function _objectWithoutProperties(e, t) {
+  if (null == e) return {};
+  var o,
+    r,
+    i = objectWithoutPropertiesLoose(e, t);
+  if (Object.getOwnPropertySymbols) {
+    var n = Object.getOwnPropertySymbols(e);
+    for (r = 0; r < n.length; r++) o = n[r], -1 === t.indexOf(o) && {}.propertyIsEnumerable.call(e, o) && (i[o] = e[o]);
+  }
+  return i;
+}
+export { _objectWithoutProperties as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectWithoutPropertiesLoose.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectWithoutPropertiesLoose.js
new file mode 100644
index 0000000..90f68f3
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/objectWithoutPropertiesLoose.js
@@ -0,0 +1,10 @@
+function _objectWithoutPropertiesLoose(r, e) {
+  if (null == r) return {};
+  var t = {};
+  for (var n in r) if ({}.hasOwnProperty.call(r, n)) {
+    if (-1 !== e.indexOf(n)) continue;
+    t[n] = r[n];
+  }
+  return t;
+}
+export { _objectWithoutPropertiesLoose as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/package.json b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/package.json
new file mode 100644
index 0000000..aead43d
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/package.json
@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/possibleConstructorReturn.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/possibleConstructorReturn.js
new file mode 100644
index 0000000..d84e1e6
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/possibleConstructorReturn.js
@@ -0,0 +1,8 @@
+import _typeof from "./typeof.js";
+import assertThisInitialized from "./assertThisInitialized.js";
+function _possibleConstructorReturn(t, e) {
+  if (e && ("object" == _typeof(e) || "function" == typeof e)) return e;
+  if (void 0 !== e) throw new TypeError("Derived constructors may only return object or undefined");
+  return assertThisInitialized(t);
+}
+export { _possibleConstructorReturn as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/readOnlyError.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/readOnlyError.js
new file mode 100644
index 0000000..fcc3e33
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/readOnlyError.js
@@ -0,0 +1,4 @@
+function _readOnlyError(r) {
+  throw new TypeError('"' + r + '" is read-only');
+}
+export { _readOnlyError as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regenerator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regenerator.js
new file mode 100644
index 0000000..6f2f2a1
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regenerator.js
@@ -0,0 +1,89 @@
+import regeneratorDefine from "./regeneratorDefine.js";
+function _regenerator() {
+  /*! regenerator-runtime -- Copyright (c) 2014-present, Facebook, Inc. -- license (MIT): https://github.com/babel/babel/blob/main/packages/babel-helpers/LICENSE */
+  var e,
+    t,
+    r = "function" == typeof Symbol ? Symbol : {},
+    n = r.iterator || "@@iterator",
+    o = r.toStringTag || "@@toStringTag";
+  function i(r, n, o, i) {
+    var c = n && n.prototype instanceof Generator ? n : Generator,
+      u = Object.create(c.prototype);
+    return regeneratorDefine(u, "_invoke", function (r, n, o) {
+      var i,
+        c,
+        u,
+        f = 0,
+        p = o || [],
+        y = !1,
+        G = {
+          p: 0,
+          n: 0,
+          v: e,
+          a: d,
+          f: d.bind(e, 4),
+          d: function d(t, r) {
+            return i = t, c = 0, u = e, G.n = r, a;
+          }
+        };
+      function d(r, n) {
+        for (c = r, u = n, t = 0; !y && f && !o && t < p.length; t++) {
+          var o,
+            i = p[t],
+            d = G.p,
+            l = i[2];
+          r > 3 ? (o = l === n) && (u = i[(c = i[4]) ? 5 : (c = 3, 3)], i[4] = i[5] = e) : i[0] <= d && ((o = r < 2 && d < i[1]) ? (c = 0, G.v = n, G.n = i[1]) : d < l && (o = r < 3 || i[0] > n || n > l) && (i[4] = r, i[5] = n, G.n = l, c = 0));
+        }
+        if (o || r > 1) return a;
+        throw y = !0, n;
+      }
+      return function (o, p, l) {
+        if (f > 1) throw TypeError("Generator is already running");
+        for (y && 1 === p && d(p, l), c = p, u = l; (t = c < 2 ? e : u) || !y;) {
+          i || (c ? c < 3 ? (c > 1 && (G.n = -1), d(c, u)) : G.n = u : G.v = u);
+          try {
+            if (f = 2, i) {
+              if (c || (o = "next"), t = i[o]) {
+                if (!(t = t.call(i, u))) throw TypeError("iterator result is not an object");
+                if (!t.done) return t;
+                u = t.value, c < 2 && (c = 0);
+              } else 1 === c && (t = i["return"]) && t.call(i), c < 2 && (u = TypeError("The iterator does not provide a '" + o + "' method"), c = 1);
+              i = e;
+            } else if ((t = (y = G.n < 0) ? u : r.call(n, G)) !== a) break;
+          } catch (t) {
+            i = e, c = 1, u = t;
+          } finally {
+            f = 1;
+          }
+        }
+        return {
+          value: t,
+          done: y
+        };
+      };
+    }(r, o, i), !0), u;
+  }
+  var a = {};
+  function Generator() {}
+  function GeneratorFunction() {}
+  function GeneratorFunctionPrototype() {}
+  t = Object.getPrototypeOf;
+  var c = [][n] ? t(t([][n]())) : (regeneratorDefine(t = {}, n, function () {
+      return this;
+    }), t),
+    u = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(c);
+  function f(e) {
+    return Object.setPrototypeOf ? Object.setPrototypeOf(e, GeneratorFunctionPrototype) : (e.__proto__ = GeneratorFunctionPrototype, regeneratorDefine(e, o, "GeneratorFunction")), e.prototype = Object.create(u), e;
+  }
+  return GeneratorFunction.prototype = GeneratorFunctionPrototype, regeneratorDefine(u, "constructor", GeneratorFunctionPrototype), regeneratorDefine(GeneratorFunctionPrototype, "constructor", GeneratorFunction), GeneratorFunction.displayName = "GeneratorFunction", regeneratorDefine(GeneratorFunctionPrototype, o, "GeneratorFunction"), regeneratorDefine(u), regeneratorDefine(u, o, "Generator"), regeneratorDefine(u, n, function () {
+    return this;
+  }), regeneratorDefine(u, "toString", function () {
+    return "[object Generator]";
+  }), (_regenerator = function _regenerator() {
+    return {
+      w: i,
+      m: f
+    };
+  })();
+}
+export { _regenerator as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorAsync.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorAsync.js
new file mode 100644
index 0000000..f73d4e6
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorAsync.js
@@ -0,0 +1,8 @@
+import regeneratorAsyncGen from "./regeneratorAsyncGen.js";
+function _regeneratorAsync(n, e, r, t, o) {
+  var a = regeneratorAsyncGen(n, e, r, t, o);
+  return a.next().then(function (n) {
+    return n.done ? n.value : a.next();
+  });
+}
+export { _regeneratorAsync as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorAsyncGen.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorAsyncGen.js
new file mode 100644
index 0000000..1932bcd
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorAsyncGen.js
@@ -0,0 +1,6 @@
+import regenerator from "./regenerator.js";
+import regeneratorAsyncIterator from "./regeneratorAsyncIterator.js";
+function _regeneratorAsyncGen(r, e, t, o, n) {
+  return new regeneratorAsyncIterator(regenerator().w(r, e, t, o), n || Promise);
+}
+export { _regeneratorAsyncGen as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorAsyncIterator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorAsyncIterator.js
new file mode 100644
index 0000000..90d84cc
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorAsyncIterator.js
@@ -0,0 +1,33 @@
+import OverloadYield from "./OverloadYield.js";
+import regeneratorDefine from "./regeneratorDefine.js";
+function AsyncIterator(t, e) {
+  function n(r, o, i, f) {
+    try {
+      var c = t[r](o),
+        u = c.value;
+      return u instanceof OverloadYield ? e.resolve(u.v).then(function (t) {
+        n("next", t, i, f);
+      }, function (t) {
+        n("throw", t, i, f);
+      }) : e.resolve(u).then(function (t) {
+        c.value = t, i(c);
+      }, function (t) {
+        return n("throw", t, i, f);
+      });
+    } catch (t) {
+      f(t);
+    }
+  }
+  var r;
+  this.next || (regeneratorDefine(AsyncIterator.prototype), regeneratorDefine(AsyncIterator.prototype, "function" == typeof Symbol && Symbol.asyncIterator || "@asyncIterator", function () {
+    return this;
+  })), regeneratorDefine(this, "_invoke", function (t, o, i) {
+    function f() {
+      return new e(function (e, r) {
+        n(t, i, e, r);
+      });
+    }
+    return r = r ? r.then(f, f) : f();
+  }, !0);
+}
+export { AsyncIterator as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorDefine.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorDefine.js
new file mode 100644
index 0000000..7140470
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorDefine.js
@@ -0,0 +1,22 @@
+function _regeneratorDefine(e, r, n, t) {
+  var i = Object.defineProperty;
+  try {
+    i({}, "", {});
+  } catch (e) {
+    i = 0;
+  }
+  _regeneratorDefine = function regeneratorDefine(e, r, n, t) {
+    function o(r, n) {
+      _regeneratorDefine(e, r, function (e) {
+        return this._invoke(r, n, e);
+      });
+    }
+    r ? i ? i(e, r, {
+      value: n,
+      enumerable: !t,
+      configurable: !t,
+      writable: !t
+    }) : e[r] = n : (o("next", 0), o("throw", 1), o("return", 2));
+  }, _regeneratorDefine(e, r, n, t);
+}
+export { _regeneratorDefine as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorKeys.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorKeys.js
new file mode 100644
index 0000000..5d0d48b
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorKeys.js
@@ -0,0 +1,10 @@
+function _regeneratorKeys(e) {
+  var n = Object(e),
+    r = [];
+  for (var t in n) r.unshift(t);
+  return function e() {
+    for (; r.length;) if ((t = r.pop()) in n) return e.value = t, e.done = !1, e;
+    return e.done = !0, e;
+  };
+}
+export { _regeneratorKeys as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorRuntime.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorRuntime.js
new file mode 100644
index 0000000..3350188
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorRuntime.js
@@ -0,0 +1,77 @@
+import OverloadYield from "./OverloadYield.js";
+import regenerator from "./regenerator.js";
+import regeneratorAsync from "./regeneratorAsync.js";
+import regeneratorAsyncGen from "./regeneratorAsyncGen.js";
+import regeneratorAsyncIterator from "./regeneratorAsyncIterator.js";
+import regeneratorKeys from "./regeneratorKeys.js";
+import regeneratorValues from "./regeneratorValues.js";
+function _regeneratorRuntime() {
+  "use strict";
+
+  var r = regenerator(),
+    e = r.m(_regeneratorRuntime),
+    t = (Object.getPrototypeOf ? Object.getPrototypeOf(e) : e.__proto__).constructor;
+  function n(r) {
+    var e = "function" == typeof r && r.constructor;
+    return !!e && (e === t || "GeneratorFunction" === (e.displayName || e.name));
+  }
+  var o = {
+    "throw": 1,
+    "return": 2,
+    "break": 3,
+    "continue": 3
+  };
+  function a(r) {
+    var e, t;
+    return function (n) {
+      e || (e = {
+        stop: function stop() {
+          return t(n.a, 2);
+        },
+        "catch": function _catch() {
+          return n.v;
+        },
+        abrupt: function abrupt(r, e) {
+          return t(n.a, o[r], e);
+        },
+        delegateYield: function delegateYield(r, o, a) {
+          return e.resultName = o, t(n.d, regeneratorValues(r), a);
+        },
+        finish: function finish(r) {
+          return t(n.f, r);
+        }
+      }, t = function t(r, _t, o) {
+        n.p = e.prev, n.n = e.next;
+        try {
+          return r(_t, o);
+        } finally {
+          e.next = n.n;
+        }
+      }), e.resultName && (e[e.resultName] = n.v, e.resultName = void 0), e.sent = n.v, e.next = n.n;
+      try {
+        return r.call(this, e);
+      } finally {
+        n.p = e.prev, n.n = e.next;
+      }
+    };
+  }
+  return (_regeneratorRuntime = function _regeneratorRuntime() {
+    return {
+      wrap: function wrap(e, t, n, o) {
+        return r.w(a(e), t, n, o && o.reverse());
+      },
+      isGeneratorFunction: n,
+      mark: r.m,
+      awrap: function awrap(r, e) {
+        return new OverloadYield(r, e);
+      },
+      AsyncIterator: regeneratorAsyncIterator,
+      async: function async(r, e, t, o, u) {
+        return (n(e) ? regeneratorAsyncGen : regeneratorAsync)(a(r), e, t, o, u);
+      },
+      keys: regeneratorKeys,
+      values: regeneratorValues
+    };
+  })();
+}
+export { _regeneratorRuntime as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorValues.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorValues.js
new file mode 100644
index 0000000..9996852
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/regeneratorValues.js
@@ -0,0 +1,19 @@
+import _typeof from "./typeof.js";
+function _regeneratorValues(e) {
+  if (null != e) {
+    var t = e["function" == typeof Symbol && Symbol.iterator || "@@iterator"],
+      r = 0;
+    if (t) return t.call(e);
+    if ("function" == typeof e.next) return e;
+    if (!isNaN(e.length)) return {
+      next: function next() {
+        return e && r >= e.length && (e = void 0), {
+          value: e && e[r++],
+          done: !e
+        };
+      }
+    };
+  }
+  throw new TypeError(_typeof(e) + " is not iterable");
+}
+export { _regeneratorValues as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/set.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/set.js
new file mode 100644
index 0000000..ed0a803
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/set.js
@@ -0,0 +1,22 @@
+import superPropBase from "./superPropBase.js";
+import defineProperty from "./defineProperty.js";
+function set(e, r, t, o) {
+  return set = "undefined" != typeof Reflect && Reflect.set ? Reflect.set : function (e, r, t, o) {
+    var f,
+      i = superPropBase(e, r);
+    if (i) {
+      if ((f = Object.getOwnPropertyDescriptor(i, r)).set) return f.set.call(o, t), !0;
+      if (!f.writable) return !1;
+    }
+    if (f = Object.getOwnPropertyDescriptor(o, r)) {
+      if (!f.writable) return !1;
+      f.value = t, Object.defineProperty(o, r, f);
+    } else defineProperty(o, r, t);
+    return !0;
+  }, set(e, r, t, o);
+}
+function _set(e, r, t, o, f) {
+  if (!set(e, r, t, o || e) && f) throw new TypeError("failed to set property");
+  return t;
+}
+export { _set as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/setFunctionName.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/setFunctionName.js
new file mode 100644
index 0000000..82213ce
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/setFunctionName.js
@@ -0,0 +1,12 @@
+import _typeof from "./typeof.js";
+function setFunctionName(e, t, n) {
+  "symbol" == _typeof(t) && (t = (t = t.description) ? "[" + t + "]" : "");
+  try {
+    Object.defineProperty(e, "name", {
+      configurable: !0,
+      value: n ? n + " " + t : t
+    });
+  } catch (e) {}
+  return e;
+}
+export { setFunctionName as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/setPrototypeOf.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/setPrototypeOf.js
new file mode 100644
index 0000000..c30983c
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/setPrototypeOf.js
@@ -0,0 +1,6 @@
+function _setPrototypeOf(t, e) {
+  return _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function (t, e) {
+    return t.__proto__ = e, t;
+  }, _setPrototypeOf(t, e);
+}
+export { _setPrototypeOf as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/skipFirstGeneratorNext.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/skipFirstGeneratorNext.js
new file mode 100644
index 0000000..41d5738
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/skipFirstGeneratorNext.js
@@ -0,0 +1,7 @@
+function _skipFirstGeneratorNext(t) {
+  return function () {
+    var r = t.apply(this, arguments);
+    return r.next(), r;
+  };
+}
+export { _skipFirstGeneratorNext as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/slicedToArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/slicedToArray.js
new file mode 100644
index 0000000..c044c2a
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/slicedToArray.js
@@ -0,0 +1,8 @@
+import arrayWithHoles from "./arrayWithHoles.js";
+import iterableToArrayLimit from "./iterableToArrayLimit.js";
+import unsupportedIterableToArray from "./unsupportedIterableToArray.js";
+import nonIterableRest from "./nonIterableRest.js";
+function _slicedToArray(r, e) {
+  return arrayWithHoles(r) || iterableToArrayLimit(r, e) || unsupportedIterableToArray(r, e) || nonIterableRest();
+}
+export { _slicedToArray as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/superPropBase.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/superPropBase.js
new file mode 100644
index 0000000..a5fa386
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/superPropBase.js
@@ -0,0 +1,6 @@
+import getPrototypeOf from "./getPrototypeOf.js";
+function _superPropBase(t, o) {
+  for (; !{}.hasOwnProperty.call(t, o) && null !== (t = getPrototypeOf(t)););
+  return t;
+}
+export { _superPropBase as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/superPropGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/superPropGet.js
new file mode 100644
index 0000000..b2b60a8
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/superPropGet.js
@@ -0,0 +1,9 @@
+import get from "./get.js";
+import getPrototypeOf from "./getPrototypeOf.js";
+function _superPropGet(t, o, e, r) {
+  var p = get(getPrototypeOf(1 & r ? t.prototype : t), o, e);
+  return 2 & r && "function" == typeof p ? function (t) {
+    return p.apply(e, t);
+  } : p;
+}
+export { _superPropGet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/superPropSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/superPropSet.js
new file mode 100644
index 0000000..e182f38
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/superPropSet.js
@@ -0,0 +1,6 @@
+import set from "./set.js";
+import getPrototypeOf from "./getPrototypeOf.js";
+function _superPropSet(t, e, o, r, p, f) {
+  return set(getPrototypeOf(f ? t.prototype : t), e, o, r, p);
+}
+export { _superPropSet as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/taggedTemplateLiteral.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/taggedTemplateLiteral.js
new file mode 100644
index 0000000..3d842cd
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/taggedTemplateLiteral.js
@@ -0,0 +1,8 @@
+function _taggedTemplateLiteral(e, t) {
+  return t || (t = e.slice(0)), Object.freeze(Object.defineProperties(e, {
+    raw: {
+      value: Object.freeze(t)
+    }
+  }));
+}
+export { _taggedTemplateLiteral as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/taggedTemplateLiteralLoose.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/taggedTemplateLiteralLoose.js
new file mode 100644
index 0000000..741aeb8
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/taggedTemplateLiteralLoose.js
@@ -0,0 +1,4 @@
+function _taggedTemplateLiteralLoose(e, t) {
+  return t || (t = e.slice(0)), e.raw = t, e;
+}
+export { _taggedTemplateLiteralLoose as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/tdz.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/tdz.js
new file mode 100644
index 0000000..58df493
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/tdz.js
@@ -0,0 +1,4 @@
+function _tdzError(e) {
+  throw new ReferenceError(e + " is not defined - temporal dead zone");
+}
+export { _tdzError as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/temporalRef.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/temporalRef.js
new file mode 100644
index 0000000..8dbf014
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/temporalRef.js
@@ -0,0 +1,6 @@
+import temporalUndefined from "./temporalUndefined.js";
+import tdz from "./tdz.js";
+function _temporalRef(r, e) {
+  return r === temporalUndefined ? tdz(e) : r;
+}
+export { _temporalRef as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/temporalUndefined.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/temporalUndefined.js
new file mode 100644
index 0000000..2ec0b0d
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/temporalUndefined.js
@@ -0,0 +1,2 @@
+function _temporalUndefined() {}
+export { _temporalUndefined as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toArray.js
new file mode 100644
index 0000000..e5f0f52
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toArray.js
@@ -0,0 +1,8 @@
+import arrayWithHoles from "./arrayWithHoles.js";
+import iterableToArray from "./iterableToArray.js";
+import unsupportedIterableToArray from "./unsupportedIterableToArray.js";
+import nonIterableRest from "./nonIterableRest.js";
+function _toArray(r) {
+  return arrayWithHoles(r) || iterableToArray(r) || unsupportedIterableToArray(r) || nonIterableRest();
+}
+export { _toArray as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toConsumableArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toConsumableArray.js
new file mode 100644
index 0000000..f7338e4
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toConsumableArray.js
@@ -0,0 +1,8 @@
+import arrayWithoutHoles from "./arrayWithoutHoles.js";
+import iterableToArray from "./iterableToArray.js";
+import unsupportedIterableToArray from "./unsupportedIterableToArray.js";
+import nonIterableSpread from "./nonIterableSpread.js";
+function _toConsumableArray(r) {
+  return arrayWithoutHoles(r) || iterableToArray(r) || unsupportedIterableToArray(r) || nonIterableSpread();
+}
+export { _toConsumableArray as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toPrimitive.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toPrimitive.js
new file mode 100644
index 0000000..9a3de46
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toPrimitive.js
@@ -0,0 +1,12 @@
+import _typeof from "./typeof.js";
+function toPrimitive(t, r) {
+  if ("object" != _typeof(t) || !t) return t;
+  var e = t[Symbol.toPrimitive];
+  if (void 0 !== e) {
+    var i = e.call(t, r || "default");
+    if ("object" != _typeof(i)) return i;
+    throw new TypeError("@@toPrimitive must return a primitive value.");
+  }
+  return ("string" === r ? String : Number)(t);
+}
+export { toPrimitive as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toPropertyKey.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toPropertyKey.js
new file mode 100644
index 0000000..b3274d8
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toPropertyKey.js
@@ -0,0 +1,7 @@
+import _typeof from "./typeof.js";
+import toPrimitive from "./toPrimitive.js";
+function toPropertyKey(t) {
+  var i = toPrimitive(t, "string");
+  return "symbol" == _typeof(i) ? i : i + "";
+}
+export { toPropertyKey as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toSetter.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toSetter.js
new file mode 100644
index 0000000..b1dbf7a
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/toSetter.js
@@ -0,0 +1,10 @@
+function _toSetter(t, e, n) {
+  e || (e = []);
+  var r = e.length++;
+  return Object.defineProperty({}, "_", {
+    set: function set(o) {
+      e[r] = o, t.apply(n, e);
+    }
+  });
+}
+export { _toSetter as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/tsRewriteRelativeImportExtensions.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/tsRewriteRelativeImportExtensions.js
new file mode 100644
index 0000000..28ffc0b
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/tsRewriteRelativeImportExtensions.js
@@ -0,0 +1,6 @@
+function tsRewriteRelativeImportExtensions(t, e) {
+  return "string" == typeof t && /^\.\.?\//.test(t) ? t.replace(/\.(tsx)$|((?:\.d)?)((?:\.[^./]+)?)\.([cm]?)ts$/i, function (t, s, r, n, o) {
+    return s ? e ? ".jsx" : ".js" : !r || n && o ? r + n + "." + o.toLowerCase() + "js" : t;
+  }) : t;
+}
+export { tsRewriteRelativeImportExtensions as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/typeof.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/typeof.js
new file mode 100644
index 0000000..5b0bc9b
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/typeof.js
@@ -0,0 +1,10 @@
+function _typeof(o) {
+  "@babel/helpers - typeof";
+
+  return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) {
+    return typeof o;
+  } : function (o) {
+    return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o;
+  }, _typeof(o);
+}
+export { _typeof as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/unsupportedIterableToArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/unsupportedIterableToArray.js
new file mode 100644
index 0000000..33adc49
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/unsupportedIterableToArray.js
@@ -0,0 +1,9 @@
+import arrayLikeToArray from "./arrayLikeToArray.js";
+function _unsupportedIterableToArray(r, a) {
+  if (r) {
+    if ("string" == typeof r) return arrayLikeToArray(r, a);
+    var t = {}.toString.call(r).slice(8, -1);
+    return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? arrayLikeToArray(r, a) : void 0;
+  }
+}
+export { _unsupportedIterableToArray as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/using.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/using.js
new file mode 100644
index 0000000..9bda17b
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/using.js
@@ -0,0 +1,12 @@
+function _using(o, n, e) {
+  if (null == n) return n;
+  if (Object(n) !== n) throw new TypeError("using declarations can only be used with objects, functions, null, or undefined.");
+  if (e) var r = n[Symbol.asyncDispose || Symbol["for"]("Symbol.asyncDispose")];
+  if (null == r && (r = n[Symbol.dispose || Symbol["for"]("Symbol.dispose")]), "function" != typeof r) throw new TypeError("Property [Symbol.dispose] is not a function.");
+  return o.push({
+    v: n,
+    d: r,
+    a: e
+  }), n;
+}
+export { _using as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/usingCtx.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/usingCtx.js
new file mode 100644
index 0000000..1464379
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/usingCtx.js
@@ -0,0 +1,59 @@
+function _usingCtx() {
+  var r = "function" == typeof SuppressedError ? SuppressedError : function (r, e) {
+      var n = Error();
+      return n.name = "SuppressedError", n.error = r, n.suppressed = e, n;
+    },
+    e = {},
+    n = [];
+  function using(r, e) {
+    if (null != e) {
+      if (Object(e) !== e) throw new TypeError("using declarations can only be used with objects, functions, null, or undefined.");
+      if (r) var o = e[Symbol.asyncDispose || Symbol["for"]("Symbol.asyncDispose")];
+      if (void 0 === o && (o = e[Symbol.dispose || Symbol["for"]("Symbol.dispose")], r)) var t = o;
+      if ("function" != typeof o) throw new TypeError("Object is not disposable.");
+      t && (o = function o() {
+        try {
+          t.call(e);
+        } catch (r) {
+          return Promise.reject(r);
+        }
+      }), n.push({
+        v: e,
+        d: o,
+        a: r
+      });
+    } else r && n.push({
+      d: e,
+      a: r
+    });
+    return e;
+  }
+  return {
+    e: e,
+    u: using.bind(null, !1),
+    a: using.bind(null, !0),
+    d: function d() {
+      var o,
+        t = this.e,
+        s = 0;
+      function next() {
+        for (; o = n.pop();) try {
+          if (!o.a && 1 === s) return s = 0, n.push(o), Promise.resolve().then(next);
+          if (o.d) {
+            var r = o.d.call(o.v);
+            if (o.a) return s |= 2, Promise.resolve(r).then(next, err);
+          } else s |= 1;
+        } catch (r) {
+          return err(r);
+        }
+        if (1 === s) return t !== e ? Promise.reject(t) : Promise.resolve();
+        if (t !== e) throw t;
+      }
+      function err(n) {
+        return t = t !== e ? new r(n, t) : n, next();
+      }
+      return next();
+    }
+  };
+}
+export { _usingCtx as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/wrapAsyncGenerator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/wrapAsyncGenerator.js
new file mode 100644
index 0000000..7957d61
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/wrapAsyncGenerator.js
@@ -0,0 +1,56 @@
+import OverloadYield from "./OverloadYield.js";
+function _wrapAsyncGenerator(e) {
+  return function () {
+    return new AsyncGenerator(e.apply(this, arguments));
+  };
+}
+function AsyncGenerator(e) {
+  var t, n;
+  function resume(t, n) {
+    try {
+      var r = e[t](n),
+        o = r.value,
+        u = o instanceof OverloadYield;
+      Promise.resolve(u ? o.v : o).then(function (n) {
+        if (u) {
+          var i = "return" === t && o.k ? t : "next";
+          if (!o.k || n.done) return resume(i, n);
+          n = e[i](n).value;
+        }
+        settle(!!r.done, n);
+      }, function (e) {
+        resume("throw", e);
+      });
+    } catch (e) {
+      settle(2, e);
+    }
+  }
+  function settle(e, r) {
+    2 === e ? t.reject(r) : t.resolve({
+      value: r,
+      done: e
+    }), (t = t.next) ? resume(t.key, t.arg) : n = null;
+  }
+  this._invoke = function (e, r) {
+    return new Promise(function (o, u) {
+      var i = {
+        key: e,
+        arg: r,
+        resolve: o,
+        reject: u,
+        next: null
+      };
+      n ? n = n.next = i : (t = n = i, resume(e, r));
+    });
+  }, "function" != typeof e["return"] && (this["return"] = void 0);
+}
+AsyncGenerator.prototype["function" == typeof Symbol && Symbol.asyncIterator || "@@asyncIterator"] = function () {
+  return this;
+}, AsyncGenerator.prototype.next = function (e) {
+  return this._invoke("next", e);
+}, AsyncGenerator.prototype["throw"] = function (e) {
+  return this._invoke("throw", e);
+}, AsyncGenerator.prototype["return"] = function (e) {
+  return this._invoke("return", e);
+};
+export { _wrapAsyncGenerator as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/wrapNativeSuper.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/wrapNativeSuper.js
new file mode 100644
index 0000000..15bf78f
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/wrapNativeSuper.js
@@ -0,0 +1,27 @@
+import getPrototypeOf from "./getPrototypeOf.js";
+import setPrototypeOf from "./setPrototypeOf.js";
+import isNativeFunction from "./isNativeFunction.js";
+import construct from "./construct.js";
+function _wrapNativeSuper(t) {
+  var r = "function" == typeof Map ? new Map() : void 0;
+  return _wrapNativeSuper = function _wrapNativeSuper(t) {
+    if (null === t || !isNativeFunction(t)) return t;
+    if ("function" != typeof t) throw new TypeError("Super expression must either be null or a function");
+    if (void 0 !== r) {
+      if (r.has(t)) return r.get(t);
+      r.set(t, Wrapper);
+    }
+    function Wrapper() {
+      return construct(t, arguments, getPrototypeOf(this).constructor);
+    }
+    return Wrapper.prototype = Object.create(t.prototype, {
+      constructor: {
+        value: Wrapper,
+        enumerable: !1,
+        writable: !0,
+        configurable: !0
+      }
+    }), setPrototypeOf(Wrapper, t);
+  }, _wrapNativeSuper(t);
+}
+export { _wrapNativeSuper as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/wrapRegExp.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/wrapRegExp.js
new file mode 100644
index 0000000..c455faa
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/wrapRegExp.js
@@ -0,0 +1,52 @@
+import _typeof from "./typeof.js";
+import setPrototypeOf from "./setPrototypeOf.js";
+import inherits from "./inherits.js";
+function _wrapRegExp() {
+  _wrapRegExp = function _wrapRegExp(e, r) {
+    return new BabelRegExp(e, void 0, r);
+  };
+  var e = RegExp.prototype,
+    r = new WeakMap();
+  function BabelRegExp(e, t, p) {
+    var o = RegExp(e, t);
+    return r.set(o, p || r.get(e)), setPrototypeOf(o, BabelRegExp.prototype);
+  }
+  function buildGroups(e, t) {
+    var p = r.get(t);
+    return Object.keys(p).reduce(function (r, t) {
+      var o = p[t];
+      if ("number" == typeof o) r[t] = e[o];else {
+        for (var i = 0; void 0 === e[o[i]] && i + 1 < o.length;) i++;
+        r[t] = e[o[i]];
+      }
+      return r;
+    }, Object.create(null));
+  }
+  return inherits(BabelRegExp, RegExp), BabelRegExp.prototype.exec = function (r) {
+    var t = e.exec.call(this, r);
+    if (t) {
+      t.groups = buildGroups(t, this);
+      var p = t.indices;
+      p && (p.groups = buildGroups(p, this));
+    }
+    return t;
+  }, BabelRegExp.prototype[Symbol.replace] = function (t, p) {
+    if ("string" == typeof p) {
+      var o = r.get(this);
+      return e[Symbol.replace].call(this, t, p.replace(/\$<([^>]+)(>|$)/g, function (e, r, t) {
+        if ("" === t) return e;
+        var p = o[r];
+        return Array.isArray(p) ? "$" + p.join("$") : "number" == typeof p ? "$" + p : "";
+      }));
+    }
+    if ("function" == typeof p) {
+      var i = this;
+      return e[Symbol.replace].call(this, t, function () {
+        var e = arguments;
+        return "object" != _typeof(e[e.length - 1]) && (e = [].slice.call(e)).push(buildGroups(e, i)), p.apply(this, e);
+      });
+    }
+    return e[Symbol.replace].call(this, t, p);
+  }, _wrapRegExp.apply(this, arguments);
+}
+export { _wrapRegExp as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/esm/writeOnlyError.js b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/writeOnlyError.js
new file mode 100644
index 0000000..250c286
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/esm/writeOnlyError.js
@@ -0,0 +1,4 @@
+function _writeOnlyError(r) {
+  throw new TypeError('"' + r + '" is write-only');
+}
+export { _writeOnlyError as default };
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/extends.js b/mqtt-backend/node_modules/@babel/runtime/helpers/extends.js
new file mode 100644
index 0000000..eee4a1f
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/extends.js
@@ -0,0 +1,10 @@
+function _extends() {
+  return module.exports = _extends = Object.assign ? Object.assign.bind() : function (n) {
+    for (var e = 1; e < arguments.length; e++) {
+      var t = arguments[e];
+      for (var r in t) ({}).hasOwnProperty.call(t, r) && (n[r] = t[r]);
+    }
+    return n;
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports, _extends.apply(null, arguments);
+}
+module.exports = _extends, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/get.js b/mqtt-backend/node_modules/@babel/runtime/helpers/get.js
new file mode 100644
index 0000000..15428de
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/get.js
@@ -0,0 +1,11 @@
+var superPropBase = require("./superPropBase.js");
+function _get() {
+  return module.exports = _get = "undefined" != typeof Reflect && Reflect.get ? Reflect.get.bind() : function (e, t, r) {
+    var p = superPropBase(e, t);
+    if (p) {
+      var n = Object.getOwnPropertyDescriptor(p, t);
+      return n.get ? n.get.call(arguments.length < 3 ? e : r) : n.value;
+    }
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports, _get.apply(null, arguments);
+}
+module.exports = _get, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/getPrototypeOf.js b/mqtt-backend/node_modules/@babel/runtime/helpers/getPrototypeOf.js
new file mode 100644
index 0000000..9070748
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/getPrototypeOf.js
@@ -0,0 +1,6 @@
+function _getPrototypeOf(t) {
+  return module.exports = _getPrototypeOf = Object.setPrototypeOf ? Object.getPrototypeOf.bind() : function (t) {
+    return t.__proto__ || Object.getPrototypeOf(t);
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports, _getPrototypeOf(t);
+}
+module.exports = _getPrototypeOf, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/identity.js b/mqtt-backend/node_modules/@babel/runtime/helpers/identity.js
new file mode 100644
index 0000000..54de5b5
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/identity.js
@@ -0,0 +1,4 @@
+function _identity(t) {
+  return t;
+}
+module.exports = _identity, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/importDeferProxy.js b/mqtt-backend/node_modules/@babel/runtime/helpers/importDeferProxy.js
new file mode 100644
index 0000000..cffaae6
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/importDeferProxy.js
@@ -0,0 +1,27 @@
+function _importDeferProxy(e) {
+  var t = null,
+    constValue = function constValue(e) {
+      return function () {
+        return e;
+      };
+    },
+    proxy = function proxy(r) {
+      return function (n, o, f) {
+        return null === t && (t = e()), r(t, o, f);
+      };
+    };
+  return new Proxy({}, {
+    defineProperty: constValue(!1),
+    deleteProperty: constValue(!1),
+    get: proxy(Reflect.get),
+    getOwnPropertyDescriptor: proxy(Reflect.getOwnPropertyDescriptor),
+    getPrototypeOf: constValue(null),
+    isExtensible: constValue(!1),
+    has: proxy(Reflect.has),
+    ownKeys: proxy(Reflect.ownKeys),
+    preventExtensions: constValue(!0),
+    set: constValue(!1),
+    setPrototypeOf: constValue(!1)
+  });
+}
+module.exports = _importDeferProxy, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/inherits.js b/mqtt-backend/node_modules/@babel/runtime/helpers/inherits.js
new file mode 100644
index 0000000..715a78e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/inherits.js
@@ -0,0 +1,14 @@
+var setPrototypeOf = require("./setPrototypeOf.js");
+function _inherits(t, e) {
+  if ("function" != typeof e && null !== e) throw new TypeError("Super expression must either be null or a function");
+  t.prototype = Object.create(e && e.prototype, {
+    constructor: {
+      value: t,
+      writable: !0,
+      configurable: !0
+    }
+  }), Object.defineProperty(t, "prototype", {
+    writable: !1
+  }), e && setPrototypeOf(t, e);
+}
+module.exports = _inherits, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/inheritsLoose.js b/mqtt-backend/node_modules/@babel/runtime/helpers/inheritsLoose.js
new file mode 100644
index 0000000..a27baf0
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/inheritsLoose.js
@@ -0,0 +1,5 @@
+var setPrototypeOf = require("./setPrototypeOf.js");
+function _inheritsLoose(t, o) {
+  t.prototype = Object.create(o.prototype), t.prototype.constructor = t, setPrototypeOf(t, o);
+}
+module.exports = _inheritsLoose, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/initializerDefineProperty.js b/mqtt-backend/node_modules/@babel/runtime/helpers/initializerDefineProperty.js
new file mode 100644
index 0000000..f9fa317
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/initializerDefineProperty.js
@@ -0,0 +1,9 @@
+function _initializerDefineProperty(e, i, r, l) {
+  r && Object.defineProperty(e, i, {
+    enumerable: r.enumerable,
+    configurable: r.configurable,
+    writable: r.writable,
+    value: r.initializer ? r.initializer.call(l) : void 0
+  });
+}
+module.exports = _initializerDefineProperty, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/initializerWarningHelper.js b/mqtt-backend/node_modules/@babel/runtime/helpers/initializerWarningHelper.js
new file mode 100644
index 0000000..e14ce59
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/initializerWarningHelper.js
@@ -0,0 +1,4 @@
+function _initializerWarningHelper(r, e) {
+  throw Error("Decorating class property failed. Please ensure that transform-class-properties is enabled and runs after the decorators transform.");
+}
+module.exports = _initializerWarningHelper, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/instanceof.js b/mqtt-backend/node_modules/@babel/runtime/helpers/instanceof.js
new file mode 100644
index 0000000..9952301
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/instanceof.js
@@ -0,0 +1,4 @@
+function _instanceof(n, e) {
+  return null != e && "undefined" != typeof Symbol && e[Symbol.hasInstance] ? !!e[Symbol.hasInstance](n) : n instanceof e;
+}
+module.exports = _instanceof, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/interopRequireDefault.js b/mqtt-backend/node_modules/@babel/runtime/helpers/interopRequireDefault.js
new file mode 100644
index 0000000..6944715
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/interopRequireDefault.js
@@ -0,0 +1,6 @@
+function _interopRequireDefault(e) {
+  return e && e.__esModule ? e : {
+    "default": e
+  };
+}
+module.exports = _interopRequireDefault, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/interopRequireWildcard.js b/mqtt-backend/node_modules/@babel/runtime/helpers/interopRequireWildcard.js
new file mode 100644
index 0000000..d5f1054
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/interopRequireWildcard.js
@@ -0,0 +1,22 @@
+var _typeof = require("./typeof.js")["default"];
+function _interopRequireWildcard(e, t) {
+  if ("function" == typeof WeakMap) var r = new WeakMap(),
+    n = new WeakMap();
+  return (module.exports = _interopRequireWildcard = function _interopRequireWildcard(e, t) {
+    if (!t && e && e.__esModule) return e;
+    var o,
+      i,
+      f = {
+        __proto__: null,
+        "default": e
+      };
+    if (null === e || "object" != _typeof(e) && "function" != typeof e) return f;
+    if (o = t ? n : r) {
+      if (o.has(e)) return o.get(e);
+      o.set(e, f);
+    }
+    for (var _t in e) "default" !== _t && {}.hasOwnProperty.call(e, _t) && ((i = (o = Object.defineProperty) && Object.getOwnPropertyDescriptor(e, _t)) && (i.get || i.set) ? o(f, _t, i) : f[_t] = e[_t]);
+    return f;
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports)(e, t);
+}
+module.exports = _interopRequireWildcard, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/isNativeFunction.js b/mqtt-backend/node_modules/@babel/runtime/helpers/isNativeFunction.js
new file mode 100644
index 0000000..f0eb49e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/isNativeFunction.js
@@ -0,0 +1,8 @@
+function _isNativeFunction(t) {
+  try {
+    return -1 !== Function.toString.call(t).indexOf("[native code]");
+  } catch (n) {
+    return "function" == typeof t;
+  }
+}
+module.exports = _isNativeFunction, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/isNativeReflectConstruct.js b/mqtt-backend/node_modules/@babel/runtime/helpers/isNativeReflectConstruct.js
new file mode 100644
index 0000000..b677e10
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/isNativeReflectConstruct.js
@@ -0,0 +1,9 @@
+function _isNativeReflectConstruct() {
+  try {
+    var t = !Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
+  } catch (t) {}
+  return (module.exports = _isNativeReflectConstruct = function _isNativeReflectConstruct() {
+    return !!t;
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports)();
+}
+module.exports = _isNativeReflectConstruct, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/iterableToArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/iterableToArray.js
new file mode 100644
index 0000000..c839a32
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/iterableToArray.js
@@ -0,0 +1,4 @@
+function _iterableToArray(r) {
+  if ("undefined" != typeof Symbol && null != r[Symbol.iterator] || null != r["@@iterator"]) return Array.from(r);
+}
+module.exports = _iterableToArray, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/iterableToArrayLimit.js b/mqtt-backend/node_modules/@babel/runtime/helpers/iterableToArrayLimit.js
new file mode 100644
index 0000000..2671778
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/iterableToArrayLimit.js
@@ -0,0 +1,28 @@
+function _iterableToArrayLimit(r, l) {
+  var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
+  if (null != t) {
+    var e,
+      n,
+      i,
+      u,
+      a = [],
+      f = !0,
+      o = !1;
+    try {
+      if (i = (t = t.call(r)).next, 0 === l) {
+        if (Object(t) !== t) return;
+        f = !1;
+      } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0);
+    } catch (r) {
+      o = !0, n = r;
+    } finally {
+      try {
+        if (!f && null != t["return"] && (u = t["return"](), Object(u) !== u)) return;
+      } finally {
+        if (o) throw n;
+      }
+    }
+    return a;
+  }
+}
+module.exports = _iterableToArrayLimit, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/jsx.js b/mqtt-backend/node_modules/@babel/runtime/helpers/jsx.js
new file mode 100644
index 0000000..3415eea
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/jsx.js
@@ -0,0 +1,22 @@
+var REACT_ELEMENT_TYPE;
+function _createRawReactElement(e, r, E, l) {
+  REACT_ELEMENT_TYPE || (REACT_ELEMENT_TYPE = "function" == typeof Symbol && Symbol["for"] && Symbol["for"]("react.element") || 60103);
+  var o = e && e.defaultProps,
+    n = arguments.length - 3;
+  if (r || 0 === n || (r = {
+    children: void 0
+  }), 1 === n) r.children = l;else if (n > 1) {
+    for (var t = Array(n), f = 0; f < n; f++) t[f] = arguments[f + 3];
+    r.children = t;
+  }
+  if (r && o) for (var i in o) void 0 === r[i] && (r[i] = o[i]);else r || (r = o || {});
+  return {
+    $$typeof: REACT_ELEMENT_TYPE,
+    type: e,
+    key: void 0 === E ? null : "" + E,
+    ref: null,
+    props: r,
+    _owner: null
+  };
+}
+module.exports = _createRawReactElement, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/maybeArrayLike.js b/mqtt-backend/node_modules/@babel/runtime/helpers/maybeArrayLike.js
new file mode 100644
index 0000000..9873cc7
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/maybeArrayLike.js
@@ -0,0 +1,9 @@
+var arrayLikeToArray = require("./arrayLikeToArray.js");
+function _maybeArrayLike(r, a, e) {
+  if (a && !Array.isArray(a) && "number" == typeof a.length) {
+    var y = a.length;
+    return arrayLikeToArray(a, void 0 !== e && e < y ? e : y);
+  }
+  return r(a, e);
+}
+module.exports = _maybeArrayLike, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/newArrowCheck.js b/mqtt-backend/node_modules/@babel/runtime/helpers/newArrowCheck.js
new file mode 100644
index 0000000..8e74d99
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/newArrowCheck.js
@@ -0,0 +1,4 @@
+function _newArrowCheck(n, r) {
+  if (n !== r) throw new TypeError("Cannot instantiate an arrow function");
+}
+module.exports = _newArrowCheck, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/nonIterableRest.js b/mqtt-backend/node_modules/@babel/runtime/helpers/nonIterableRest.js
new file mode 100644
index 0000000..95265ba
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/nonIterableRest.js
@@ -0,0 +1,4 @@
+function _nonIterableRest() {
+  throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+}
+module.exports = _nonIterableRest, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/nonIterableSpread.js b/mqtt-backend/node_modules/@babel/runtime/helpers/nonIterableSpread.js
new file mode 100644
index 0000000..3fcf23f
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/nonIterableSpread.js
@@ -0,0 +1,4 @@
+function _nonIterableSpread() {
+  throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+}
+module.exports = _nonIterableSpread, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/nullishReceiverError.js b/mqtt-backend/node_modules/@babel/runtime/helpers/nullishReceiverError.js
new file mode 100644
index 0000000..970e023
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/nullishReceiverError.js
@@ -0,0 +1,4 @@
+function _nullishReceiverError(r) {
+  throw new TypeError("Cannot set property of null or undefined.");
+}
+module.exports = _nullishReceiverError, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/objectDestructuringEmpty.js b/mqtt-backend/node_modules/@babel/runtime/helpers/objectDestructuringEmpty.js
new file mode 100644
index 0000000..9f62a1b
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/objectDestructuringEmpty.js
@@ -0,0 +1,4 @@
+function _objectDestructuringEmpty(t) {
+  if (null == t) throw new TypeError("Cannot destructure " + t);
+}
+module.exports = _objectDestructuringEmpty, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/objectSpread.js b/mqtt-backend/node_modules/@babel/runtime/helpers/objectSpread.js
new file mode 100644
index 0000000..a367643
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/objectSpread.js
@@ -0,0 +1,14 @@
+var defineProperty = require("./defineProperty.js");
+function _objectSpread(e) {
+  for (var r = 1; r < arguments.length; r++) {
+    var t = null != arguments[r] ? Object(arguments[r]) : {},
+      o = Object.keys(t);
+    "function" == typeof Object.getOwnPropertySymbols && o.push.apply(o, Object.getOwnPropertySymbols(t).filter(function (e) {
+      return Object.getOwnPropertyDescriptor(t, e).enumerable;
+    })), o.forEach(function (r) {
+      defineProperty(e, r, t[r]);
+    });
+  }
+  return e;
+}
+module.exports = _objectSpread, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/objectSpread2.js b/mqtt-backend/node_modules/@babel/runtime/helpers/objectSpread2.js
new file mode 100644
index 0000000..4f3b9fa
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/objectSpread2.js
@@ -0,0 +1,23 @@
+var defineProperty = require("./defineProperty.js");
+function ownKeys(e, r) {
+  var t = Object.keys(e);
+  if (Object.getOwnPropertySymbols) {
+    var o = Object.getOwnPropertySymbols(e);
+    r && (o = o.filter(function (r) {
+      return Object.getOwnPropertyDescriptor(e, r).enumerable;
+    })), t.push.apply(t, o);
+  }
+  return t;
+}
+function _objectSpread2(e) {
+  for (var r = 1; r < arguments.length; r++) {
+    var t = null != arguments[r] ? arguments[r] : {};
+    r % 2 ? ownKeys(Object(t), !0).forEach(function (r) {
+      defineProperty(e, r, t[r]);
+    }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) {
+      Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r));
+    });
+  }
+  return e;
+}
+module.exports = _objectSpread2, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/objectWithoutProperties.js b/mqtt-backend/node_modules/@babel/runtime/helpers/objectWithoutProperties.js
new file mode 100644
index 0000000..3a40f9e
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/objectWithoutProperties.js
@@ -0,0 +1,13 @@
+var objectWithoutPropertiesLoose = require("./objectWithoutPropertiesLoose.js");
+function _objectWithoutProperties(e, t) {
+  if (null == e) return {};
+  var o,
+    r,
+    i = objectWithoutPropertiesLoose(e, t);
+  if (Object.getOwnPropertySymbols) {
+    var n = Object.getOwnPropertySymbols(e);
+    for (r = 0; r < n.length; r++) o = n[r], -1 === t.indexOf(o) && {}.propertyIsEnumerable.call(e, o) && (i[o] = e[o]);
+  }
+  return i;
+}
+module.exports = _objectWithoutProperties, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/objectWithoutPropertiesLoose.js b/mqtt-backend/node_modules/@babel/runtime/helpers/objectWithoutPropertiesLoose.js
new file mode 100644
index 0000000..c243acd
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/objectWithoutPropertiesLoose.js
@@ -0,0 +1,10 @@
+function _objectWithoutPropertiesLoose(r, e) {
+  if (null == r) return {};
+  var t = {};
+  for (var n in r) if ({}.hasOwnProperty.call(r, n)) {
+    if (-1 !== e.indexOf(n)) continue;
+    t[n] = r[n];
+  }
+  return t;
+}
+module.exports = _objectWithoutPropertiesLoose, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/possibleConstructorReturn.js b/mqtt-backend/node_modules/@babel/runtime/helpers/possibleConstructorReturn.js
new file mode 100644
index 0000000..06e6e6d
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/possibleConstructorReturn.js
@@ -0,0 +1,8 @@
+var _typeof = require("./typeof.js")["default"];
+var assertThisInitialized = require("./assertThisInitialized.js");
+function _possibleConstructorReturn(t, e) {
+  if (e && ("object" == _typeof(e) || "function" == typeof e)) return e;
+  if (void 0 !== e) throw new TypeError("Derived constructors may only return object or undefined");
+  return assertThisInitialized(t);
+}
+module.exports = _possibleConstructorReturn, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/readOnlyError.js b/mqtt-backend/node_modules/@babel/runtime/helpers/readOnlyError.js
new file mode 100644
index 0000000..1bf3e09
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/readOnlyError.js
@@ -0,0 +1,4 @@
+function _readOnlyError(r) {
+  throw new TypeError('"' + r + '" is read-only');
+}
+module.exports = _readOnlyError, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/regenerator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/regenerator.js
new file mode 100644
index 0000000..0cf8710
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/regenerator.js
@@ -0,0 +1,89 @@
+var regeneratorDefine = require("./regeneratorDefine.js");
+function _regenerator() {
+  /*! regenerator-runtime -- Copyright (c) 2014-present, Facebook, Inc. -- license (MIT): https://github.com/babel/babel/blob/main/packages/babel-helpers/LICENSE */
+  var e,
+    t,
+    r = "function" == typeof Symbol ? Symbol : {},
+    n = r.iterator || "@@iterator",
+    o = r.toStringTag || "@@toStringTag";
+  function i(r, n, o, i) {
+    var c = n && n.prototype instanceof Generator ? n : Generator,
+      u = Object.create(c.prototype);
+    return regeneratorDefine(u, "_invoke", function (r, n, o) {
+      var i,
+        c,
+        u,
+        f = 0,
+        p = o || [],
+        y = !1,
+        G = {
+          p: 0,
+          n: 0,
+          v: e,
+          a: d,
+          f: d.bind(e, 4),
+          d: function d(t, r) {
+            return i = t, c = 0, u = e, G.n = r, a;
+          }
+        };
+      function d(r, n) {
+        for (c = r, u = n, t = 0; !y && f && !o && t < p.length; t++) {
+          var o,
+            i = p[t],
+            d = G.p,
+            l = i[2];
+          r > 3 ? (o = l === n) && (u = i[(c = i[4]) ? 5 : (c = 3, 3)], i[4] = i[5] = e) : i[0] <= d && ((o = r < 2 && d < i[1]) ? (c = 0, G.v = n, G.n = i[1]) : d < l && (o = r < 3 || i[0] > n || n > l) && (i[4] = r, i[5] = n, G.n = l, c = 0));
+        }
+        if (o || r > 1) return a;
+        throw y = !0, n;
+      }
+      return function (o, p, l) {
+        if (f > 1) throw TypeError("Generator is already running");
+        for (y && 1 === p && d(p, l), c = p, u = l; (t = c < 2 ? e : u) || !y;) {
+          i || (c ? c < 3 ? (c > 1 && (G.n = -1), d(c, u)) : G.n = u : G.v = u);
+          try {
+            if (f = 2, i) {
+              if (c || (o = "next"), t = i[o]) {
+                if (!(t = t.call(i, u))) throw TypeError("iterator result is not an object");
+                if (!t.done) return t;
+                u = t.value, c < 2 && (c = 0);
+              } else 1 === c && (t = i["return"]) && t.call(i), c < 2 && (u = TypeError("The iterator does not provide a '" + o + "' method"), c = 1);
+              i = e;
+            } else if ((t = (y = G.n < 0) ? u : r.call(n, G)) !== a) break;
+          } catch (t) {
+            i = e, c = 1, u = t;
+          } finally {
+            f = 1;
+          }
+        }
+        return {
+          value: t,
+          done: y
+        };
+      };
+    }(r, o, i), !0), u;
+  }
+  var a = {};
+  function Generator() {}
+  function GeneratorFunction() {}
+  function GeneratorFunctionPrototype() {}
+  t = Object.getPrototypeOf;
+  var c = [][n] ? t(t([][n]())) : (regeneratorDefine(t = {}, n, function () {
+      return this;
+    }), t),
+    u = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(c);
+  function f(e) {
+    return Object.setPrototypeOf ? Object.setPrototypeOf(e, GeneratorFunctionPrototype) : (e.__proto__ = GeneratorFunctionPrototype, regeneratorDefine(e, o, "GeneratorFunction")), e.prototype = Object.create(u), e;
+  }
+  return GeneratorFunction.prototype = GeneratorFunctionPrototype, regeneratorDefine(u, "constructor", GeneratorFunctionPrototype), regeneratorDefine(GeneratorFunctionPrototype, "constructor", GeneratorFunction), GeneratorFunction.displayName = "GeneratorFunction", regeneratorDefine(GeneratorFunctionPrototype, o, "GeneratorFunction"), regeneratorDefine(u), regeneratorDefine(u, o, "Generator"), regeneratorDefine(u, n, function () {
+    return this;
+  }), regeneratorDefine(u, "toString", function () {
+    return "[object Generator]";
+  }), (module.exports = _regenerator = function _regenerator() {
+    return {
+      w: i,
+      m: f
+    };
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports)();
+}
+module.exports = _regenerator, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorAsync.js b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorAsync.js
new file mode 100644
index 0000000..d1e4c3f
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorAsync.js
@@ -0,0 +1,8 @@
+var regeneratorAsyncGen = require("./regeneratorAsyncGen.js");
+function _regeneratorAsync(n, e, r, t, o) {
+  var a = regeneratorAsyncGen(n, e, r, t, o);
+  return a.next().then(function (n) {
+    return n.done ? n.value : a.next();
+  });
+}
+module.exports = _regeneratorAsync, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorAsyncGen.js b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorAsyncGen.js
new file mode 100644
index 0000000..f0212e3
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorAsyncGen.js
@@ -0,0 +1,6 @@
+var regenerator = require("./regenerator.js");
+var regeneratorAsyncIterator = require("./regeneratorAsyncIterator.js");
+function _regeneratorAsyncGen(r, e, t, o, n) {
+  return new regeneratorAsyncIterator(regenerator().w(r, e, t, o), n || Promise);
+}
+module.exports = _regeneratorAsyncGen, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorAsyncIterator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorAsyncIterator.js
new file mode 100644
index 0000000..afcb060
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorAsyncIterator.js
@@ -0,0 +1,33 @@
+var OverloadYield = require("./OverloadYield.js");
+var regeneratorDefine = require("./regeneratorDefine.js");
+function AsyncIterator(t, e) {
+  function n(r, o, i, f) {
+    try {
+      var c = t[r](o),
+        u = c.value;
+      return u instanceof OverloadYield ? e.resolve(u.v).then(function (t) {
+        n("next", t, i, f);
+      }, function (t) {
+        n("throw", t, i, f);
+      }) : e.resolve(u).then(function (t) {
+        c.value = t, i(c);
+      }, function (t) {
+        return n("throw", t, i, f);
+      });
+    } catch (t) {
+      f(t);
+    }
+  }
+  var r;
+  this.next || (regeneratorDefine(AsyncIterator.prototype), regeneratorDefine(AsyncIterator.prototype, "function" == typeof Symbol && Symbol.asyncIterator || "@asyncIterator", function () {
+    return this;
+  })), regeneratorDefine(this, "_invoke", function (t, o, i) {
+    function f() {
+      return new e(function (e, r) {
+        n(t, i, e, r);
+      });
+    }
+    return r = r ? r.then(f, f) : f();
+  }, !0);
+}
+module.exports = AsyncIterator, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorDefine.js b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorDefine.js
new file mode 100644
index 0000000..8d7ffe0
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorDefine.js
@@ -0,0 +1,22 @@
+function _regeneratorDefine(e, r, n, t) {
+  var i = Object.defineProperty;
+  try {
+    i({}, "", {});
+  } catch (e) {
+    i = 0;
+  }
+  module.exports = _regeneratorDefine = function regeneratorDefine(e, r, n, t) {
+    function o(r, n) {
+      _regeneratorDefine(e, r, function (e) {
+        return this._invoke(r, n, e);
+      });
+    }
+    r ? i ? i(e, r, {
+      value: n,
+      enumerable: !t,
+      configurable: !t,
+      writable: !t
+    }) : e[r] = n : (o("next", 0), o("throw", 1), o("return", 2));
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports, _regeneratorDefine(e, r, n, t);
+}
+module.exports = _regeneratorDefine, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorKeys.js b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorKeys.js
new file mode 100644
index 0000000..99442bd
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorKeys.js
@@ -0,0 +1,10 @@
+function _regeneratorKeys(e) {
+  var n = Object(e),
+    r = [];
+  for (var t in n) r.unshift(t);
+  return function e() {
+    for (; r.length;) if ((t = r.pop()) in n) return e.value = t, e.done = !1, e;
+    return e.done = !0, e;
+  };
+}
+module.exports = _regeneratorKeys, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorRuntime.js b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorRuntime.js
new file mode 100644
index 0000000..24baaa0
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorRuntime.js
@@ -0,0 +1,77 @@
+var OverloadYield = require("./OverloadYield.js");
+var regenerator = require("./regenerator.js");
+var regeneratorAsync = require("./regeneratorAsync.js");
+var regeneratorAsyncGen = require("./regeneratorAsyncGen.js");
+var regeneratorAsyncIterator = require("./regeneratorAsyncIterator.js");
+var regeneratorKeys = require("./regeneratorKeys.js");
+var regeneratorValues = require("./regeneratorValues.js");
+function _regeneratorRuntime() {
+  "use strict";
+
+  var r = regenerator(),
+    e = r.m(_regeneratorRuntime),
+    t = (Object.getPrototypeOf ? Object.getPrototypeOf(e) : e.__proto__).constructor;
+  function n(r) {
+    var e = "function" == typeof r && r.constructor;
+    return !!e && (e === t || "GeneratorFunction" === (e.displayName || e.name));
+  }
+  var o = {
+    "throw": 1,
+    "return": 2,
+    "break": 3,
+    "continue": 3
+  };
+  function a(r) {
+    var e, t;
+    return function (n) {
+      e || (e = {
+        stop: function stop() {
+          return t(n.a, 2);
+        },
+        "catch": function _catch() {
+          return n.v;
+        },
+        abrupt: function abrupt(r, e) {
+          return t(n.a, o[r], e);
+        },
+        delegateYield: function delegateYield(r, o, a) {
+          return e.resultName = o, t(n.d, regeneratorValues(r), a);
+        },
+        finish: function finish(r) {
+          return t(n.f, r);
+        }
+      }, t = function t(r, _t, o) {
+        n.p = e.prev, n.n = e.next;
+        try {
+          return r(_t, o);
+        } finally {
+          e.next = n.n;
+        }
+      }), e.resultName && (e[e.resultName] = n.v, e.resultName = void 0), e.sent = n.v, e.next = n.n;
+      try {
+        return r.call(this, e);
+      } finally {
+        n.p = e.prev, n.n = e.next;
+      }
+    };
+  }
+  return (module.exports = _regeneratorRuntime = function _regeneratorRuntime() {
+    return {
+      wrap: function wrap(e, t, n, o) {
+        return r.w(a(e), t, n, o && o.reverse());
+      },
+      isGeneratorFunction: n,
+      mark: r.m,
+      awrap: function awrap(r, e) {
+        return new OverloadYield(r, e);
+      },
+      AsyncIterator: regeneratorAsyncIterator,
+      async: function async(r, e, t, o, u) {
+        return (n(e) ? regeneratorAsyncGen : regeneratorAsync)(a(r), e, t, o, u);
+      },
+      keys: regeneratorKeys,
+      values: regeneratorValues
+    };
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports)();
+}
+module.exports = _regeneratorRuntime, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorValues.js b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorValues.js
new file mode 100644
index 0000000..1335a23
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/regeneratorValues.js
@@ -0,0 +1,19 @@
+var _typeof = require("./typeof.js")["default"];
+function _regeneratorValues(e) {
+  if (null != e) {
+    var t = e["function" == typeof Symbol && Symbol.iterator || "@@iterator"],
+      r = 0;
+    if (t) return t.call(e);
+    if ("function" == typeof e.next) return e;
+    if (!isNaN(e.length)) return {
+      next: function next() {
+        return e && r >= e.length && (e = void 0), {
+          value: e && e[r++],
+          done: !e
+        };
+      }
+    };
+  }
+  throw new TypeError(_typeof(e) + " is not iterable");
+}
+module.exports = _regeneratorValues, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/set.js b/mqtt-backend/node_modules/@babel/runtime/helpers/set.js
new file mode 100644
index 0000000..6421470
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/set.js
@@ -0,0 +1,22 @@
+var superPropBase = require("./superPropBase.js");
+var defineProperty = require("./defineProperty.js");
+function set(e, r, t, o) {
+  return set = "undefined" != typeof Reflect && Reflect.set ? Reflect.set : function (e, r, t, o) {
+    var f,
+      i = superPropBase(e, r);
+    if (i) {
+      if ((f = Object.getOwnPropertyDescriptor(i, r)).set) return f.set.call(o, t), !0;
+      if (!f.writable) return !1;
+    }
+    if (f = Object.getOwnPropertyDescriptor(o, r)) {
+      if (!f.writable) return !1;
+      f.value = t, Object.defineProperty(o, r, f);
+    } else defineProperty(o, r, t);
+    return !0;
+  }, set(e, r, t, o);
+}
+function _set(e, r, t, o, f) {
+  if (!set(e, r, t, o || e) && f) throw new TypeError("failed to set property");
+  return t;
+}
+module.exports = _set, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/setFunctionName.js b/mqtt-backend/node_modules/@babel/runtime/helpers/setFunctionName.js
new file mode 100644
index 0000000..9664076
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/setFunctionName.js
@@ -0,0 +1,12 @@
+var _typeof = require("./typeof.js")["default"];
+function setFunctionName(e, t, n) {
+  "symbol" == _typeof(t) && (t = (t = t.description) ? "[" + t + "]" : "");
+  try {
+    Object.defineProperty(e, "name", {
+      configurable: !0,
+      value: n ? n + " " + t : t
+    });
+  } catch (e) {}
+  return e;
+}
+module.exports = setFunctionName, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/setPrototypeOf.js b/mqtt-backend/node_modules/@babel/runtime/helpers/setPrototypeOf.js
new file mode 100644
index 0000000..7d991ff
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/setPrototypeOf.js
@@ -0,0 +1,6 @@
+function _setPrototypeOf(t, e) {
+  return module.exports = _setPrototypeOf = Object.setPrototypeOf ? Object.setPrototypeOf.bind() : function (t, e) {
+    return t.__proto__ = e, t;
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports, _setPrototypeOf(t, e);
+}
+module.exports = _setPrototypeOf, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/skipFirstGeneratorNext.js b/mqtt-backend/node_modules/@babel/runtime/helpers/skipFirstGeneratorNext.js
new file mode 100644
index 0000000..2aed548
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/skipFirstGeneratorNext.js
@@ -0,0 +1,7 @@
+function _skipFirstGeneratorNext(t) {
+  return function () {
+    var r = t.apply(this, arguments);
+    return r.next(), r;
+  };
+}
+module.exports = _skipFirstGeneratorNext, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/slicedToArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/slicedToArray.js
new file mode 100644
index 0000000..3d752c4
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/slicedToArray.js
@@ -0,0 +1,8 @@
+var arrayWithHoles = require("./arrayWithHoles.js");
+var iterableToArrayLimit = require("./iterableToArrayLimit.js");
+var unsupportedIterableToArray = require("./unsupportedIterableToArray.js");
+var nonIterableRest = require("./nonIterableRest.js");
+function _slicedToArray(r, e) {
+  return arrayWithHoles(r) || iterableToArrayLimit(r, e) || unsupportedIterableToArray(r, e) || nonIterableRest();
+}
+module.exports = _slicedToArray, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/superPropBase.js b/mqtt-backend/node_modules/@babel/runtime/helpers/superPropBase.js
new file mode 100644
index 0000000..5cad459
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/superPropBase.js
@@ -0,0 +1,6 @@
+var getPrototypeOf = require("./getPrototypeOf.js");
+function _superPropBase(t, o) {
+  for (; !{}.hasOwnProperty.call(t, o) && null !== (t = getPrototypeOf(t)););
+  return t;
+}
+module.exports = _superPropBase, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/superPropGet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/superPropGet.js
new file mode 100644
index 0000000..baf8b10
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/superPropGet.js
@@ -0,0 +1,9 @@
+var get = require("./get.js");
+var getPrototypeOf = require("./getPrototypeOf.js");
+function _superPropGet(t, o, e, r) {
+  var p = get(getPrototypeOf(1 & r ? t.prototype : t), o, e);
+  return 2 & r && "function" == typeof p ? function (t) {
+    return p.apply(e, t);
+  } : p;
+}
+module.exports = _superPropGet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/superPropSet.js b/mqtt-backend/node_modules/@babel/runtime/helpers/superPropSet.js
new file mode 100644
index 0000000..e0578c0
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/superPropSet.js
@@ -0,0 +1,6 @@
+var set = require("./set.js");
+var getPrototypeOf = require("./getPrototypeOf.js");
+function _superPropSet(t, e, o, r, p, f) {
+  return set(getPrototypeOf(f ? t.prototype : t), e, o, r, p);
+}
+module.exports = _superPropSet, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/taggedTemplateLiteral.js b/mqtt-backend/node_modules/@babel/runtime/helpers/taggedTemplateLiteral.js
new file mode 100644
index 0000000..38d6065
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/taggedTemplateLiteral.js
@@ -0,0 +1,8 @@
+function _taggedTemplateLiteral(e, t) {
+  return t || (t = e.slice(0)), Object.freeze(Object.defineProperties(e, {
+    raw: {
+      value: Object.freeze(t)
+    }
+  }));
+}
+module.exports = _taggedTemplateLiteral, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/taggedTemplateLiteralLoose.js b/mqtt-backend/node_modules/@babel/runtime/helpers/taggedTemplateLiteralLoose.js
new file mode 100644
index 0000000..2f8c146
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/taggedTemplateLiteralLoose.js
@@ -0,0 +1,4 @@
+function _taggedTemplateLiteralLoose(e, t) {
+  return t || (t = e.slice(0)), e.raw = t, e;
+}
+module.exports = _taggedTemplateLiteralLoose, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/tdz.js b/mqtt-backend/node_modules/@babel/runtime/helpers/tdz.js
new file mode 100644
index 0000000..c66f476
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/tdz.js
@@ -0,0 +1,4 @@
+function _tdzError(e) {
+  throw new ReferenceError(e + " is not defined - temporal dead zone");
+}
+module.exports = _tdzError, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/temporalRef.js b/mqtt-backend/node_modules/@babel/runtime/helpers/temporalRef.js
new file mode 100644
index 0000000..54c9190
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/temporalRef.js
@@ -0,0 +1,6 @@
+var temporalUndefined = require("./temporalUndefined.js");
+var tdz = require("./tdz.js");
+function _temporalRef(r, e) {
+  return r === temporalUndefined ? tdz(e) : r;
+}
+module.exports = _temporalRef, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/temporalUndefined.js b/mqtt-backend/node_modules/@babel/runtime/helpers/temporalUndefined.js
new file mode 100644
index 0000000..f8def80
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/temporalUndefined.js
@@ -0,0 +1,2 @@
+function _temporalUndefined() {}
+module.exports = _temporalUndefined, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/toArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/toArray.js
new file mode 100644
index 0000000..2be1d2b
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/toArray.js
@@ -0,0 +1,8 @@
+var arrayWithHoles = require("./arrayWithHoles.js");
+var iterableToArray = require("./iterableToArray.js");
+var unsupportedIterableToArray = require("./unsupportedIterableToArray.js");
+var nonIterableRest = require("./nonIterableRest.js");
+function _toArray(r) {
+  return arrayWithHoles(r) || iterableToArray(r) || unsupportedIterableToArray(r) || nonIterableRest();
+}
+module.exports = _toArray, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/toConsumableArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/toConsumableArray.js
new file mode 100644
index 0000000..698f9c6
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/toConsumableArray.js
@@ -0,0 +1,8 @@
+var arrayWithoutHoles = require("./arrayWithoutHoles.js");
+var iterableToArray = require("./iterableToArray.js");
+var unsupportedIterableToArray = require("./unsupportedIterableToArray.js");
+var nonIterableSpread = require("./nonIterableSpread.js");
+function _toConsumableArray(r) {
+  return arrayWithoutHoles(r) || iterableToArray(r) || unsupportedIterableToArray(r) || nonIterableSpread();
+}
+module.exports = _toConsumableArray, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/toPrimitive.js b/mqtt-backend/node_modules/@babel/runtime/helpers/toPrimitive.js
new file mode 100644
index 0000000..ef9d249
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/toPrimitive.js
@@ -0,0 +1,12 @@
+var _typeof = require("./typeof.js")["default"];
+function toPrimitive(t, r) {
+  if ("object" != _typeof(t) || !t) return t;
+  var e = t[Symbol.toPrimitive];
+  if (void 0 !== e) {
+    var i = e.call(t, r || "default");
+    if ("object" != _typeof(i)) return i;
+    throw new TypeError("@@toPrimitive must return a primitive value.");
+  }
+  return ("string" === r ? String : Number)(t);
+}
+module.exports = toPrimitive, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/toPropertyKey.js b/mqtt-backend/node_modules/@babel/runtime/helpers/toPropertyKey.js
new file mode 100644
index 0000000..3ca3d4f
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/toPropertyKey.js
@@ -0,0 +1,7 @@
+var _typeof = require("./typeof.js")["default"];
+var toPrimitive = require("./toPrimitive.js");
+function toPropertyKey(t) {
+  var i = toPrimitive(t, "string");
+  return "symbol" == _typeof(i) ? i : i + "";
+}
+module.exports = toPropertyKey, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/toSetter.js b/mqtt-backend/node_modules/@babel/runtime/helpers/toSetter.js
new file mode 100644
index 0000000..e0012a8
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/toSetter.js
@@ -0,0 +1,10 @@
+function _toSetter(t, e, n) {
+  e || (e = []);
+  var r = e.length++;
+  return Object.defineProperty({}, "_", {
+    set: function set(o) {
+      e[r] = o, t.apply(n, e);
+    }
+  });
+}
+module.exports = _toSetter, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/tsRewriteRelativeImportExtensions.js b/mqtt-backend/node_modules/@babel/runtime/helpers/tsRewriteRelativeImportExtensions.js
new file mode 100644
index 0000000..4de0e4d
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/tsRewriteRelativeImportExtensions.js
@@ -0,0 +1,6 @@
+function tsRewriteRelativeImportExtensions(t, e) {
+  return "string" == typeof t && /^\.\.?\//.test(t) ? t.replace(/\.(tsx)$|((?:\.d)?)((?:\.[^./]+)?)\.([cm]?)ts$/i, function (t, s, r, n, o) {
+    return s ? e ? ".jsx" : ".js" : !r || n && o ? r + n + "." + o.toLowerCase() + "js" : t;
+  }) : t;
+}
+module.exports = tsRewriteRelativeImportExtensions, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/typeof.js b/mqtt-backend/node_modules/@babel/runtime/helpers/typeof.js
new file mode 100644
index 0000000..b6fbfaf
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/typeof.js
@@ -0,0 +1,10 @@
+function _typeof(o) {
+  "@babel/helpers - typeof";
+
+  return module.exports = _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) {
+    return typeof o;
+  } : function (o) {
+    return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o;
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports, _typeof(o);
+}
+module.exports = _typeof, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/unsupportedIterableToArray.js b/mqtt-backend/node_modules/@babel/runtime/helpers/unsupportedIterableToArray.js
new file mode 100644
index 0000000..8fb1a71
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/unsupportedIterableToArray.js
@@ -0,0 +1,9 @@
+var arrayLikeToArray = require("./arrayLikeToArray.js");
+function _unsupportedIterableToArray(r, a) {
+  if (r) {
+    if ("string" == typeof r) return arrayLikeToArray(r, a);
+    var t = {}.toString.call(r).slice(8, -1);
+    return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? arrayLikeToArray(r, a) : void 0;
+  }
+}
+module.exports = _unsupportedIterableToArray, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/using.js b/mqtt-backend/node_modules/@babel/runtime/helpers/using.js
new file mode 100644
index 0000000..37c79e2
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/using.js
@@ -0,0 +1,12 @@
+function _using(o, n, e) {
+  if (null == n) return n;
+  if (Object(n) !== n) throw new TypeError("using declarations can only be used with objects, functions, null, or undefined.");
+  if (e) var r = n[Symbol.asyncDispose || Symbol["for"]("Symbol.asyncDispose")];
+  if (null == r && (r = n[Symbol.dispose || Symbol["for"]("Symbol.dispose")]), "function" != typeof r) throw new TypeError("Property [Symbol.dispose] is not a function.");
+  return o.push({
+    v: n,
+    d: r,
+    a: e
+  }), n;
+}
+module.exports = _using, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/usingCtx.js b/mqtt-backend/node_modules/@babel/runtime/helpers/usingCtx.js
new file mode 100644
index 0000000..652ab15
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/usingCtx.js
@@ -0,0 +1,59 @@
+function _usingCtx() {
+  var r = "function" == typeof SuppressedError ? SuppressedError : function (r, e) {
+      var n = Error();
+      return n.name = "SuppressedError", n.error = r, n.suppressed = e, n;
+    },
+    e = {},
+    n = [];
+  function using(r, e) {
+    if (null != e) {
+      if (Object(e) !== e) throw new TypeError("using declarations can only be used with objects, functions, null, or undefined.");
+      if (r) var o = e[Symbol.asyncDispose || Symbol["for"]("Symbol.asyncDispose")];
+      if (void 0 === o && (o = e[Symbol.dispose || Symbol["for"]("Symbol.dispose")], r)) var t = o;
+      if ("function" != typeof o) throw new TypeError("Object is not disposable.");
+      t && (o = function o() {
+        try {
+          t.call(e);
+        } catch (r) {
+          return Promise.reject(r);
+        }
+      }), n.push({
+        v: e,
+        d: o,
+        a: r
+      });
+    } else r && n.push({
+      d: e,
+      a: r
+    });
+    return e;
+  }
+  return {
+    e: e,
+    u: using.bind(null, !1),
+    a: using.bind(null, !0),
+    d: function d() {
+      var o,
+        t = this.e,
+        s = 0;
+      function next() {
+        for (; o = n.pop();) try {
+          if (!o.a && 1 === s) return s = 0, n.push(o), Promise.resolve().then(next);
+          if (o.d) {
+            var r = o.d.call(o.v);
+            if (o.a) return s |= 2, Promise.resolve(r).then(next, err);
+          } else s |= 1;
+        } catch (r) {
+          return err(r);
+        }
+        if (1 === s) return t !== e ? Promise.reject(t) : Promise.resolve();
+        if (t !== e) throw t;
+      }
+      function err(n) {
+        return t = t !== e ? new r(n, t) : n, next();
+      }
+      return next();
+    }
+  };
+}
+module.exports = _usingCtx, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/wrapAsyncGenerator.js b/mqtt-backend/node_modules/@babel/runtime/helpers/wrapAsyncGenerator.js
new file mode 100644
index 0000000..a3d32d7
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/wrapAsyncGenerator.js
@@ -0,0 +1,56 @@
+var OverloadYield = require("./OverloadYield.js");
+function _wrapAsyncGenerator(e) {
+  return function () {
+    return new AsyncGenerator(e.apply(this, arguments));
+  };
+}
+function AsyncGenerator(e) {
+  var t, n;
+  function resume(t, n) {
+    try {
+      var r = e[t](n),
+        o = r.value,
+        u = o instanceof OverloadYield;
+      Promise.resolve(u ? o.v : o).then(function (n) {
+        if (u) {
+          var i = "return" === t && o.k ? t : "next";
+          if (!o.k || n.done) return resume(i, n);
+          n = e[i](n).value;
+        }
+        settle(!!r.done, n);
+      }, function (e) {
+        resume("throw", e);
+      });
+    } catch (e) {
+      settle(2, e);
+    }
+  }
+  function settle(e, r) {
+    2 === e ? t.reject(r) : t.resolve({
+      value: r,
+      done: e
+    }), (t = t.next) ? resume(t.key, t.arg) : n = null;
+  }
+  this._invoke = function (e, r) {
+    return new Promise(function (o, u) {
+      var i = {
+        key: e,
+        arg: r,
+        resolve: o,
+        reject: u,
+        next: null
+      };
+      n ? n = n.next = i : (t = n = i, resume(e, r));
+    });
+  }, "function" != typeof e["return"] && (this["return"] = void 0);
+}
+AsyncGenerator.prototype["function" == typeof Symbol && Symbol.asyncIterator || "@@asyncIterator"] = function () {
+  return this;
+}, AsyncGenerator.prototype.next = function (e) {
+  return this._invoke("next", e);
+}, AsyncGenerator.prototype["throw"] = function (e) {
+  return this._invoke("throw", e);
+}, AsyncGenerator.prototype["return"] = function (e) {
+  return this._invoke("return", e);
+};
+module.exports = _wrapAsyncGenerator, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/wrapNativeSuper.js b/mqtt-backend/node_modules/@babel/runtime/helpers/wrapNativeSuper.js
new file mode 100644
index 0000000..acd87ab
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/wrapNativeSuper.js
@@ -0,0 +1,27 @@
+var getPrototypeOf = require("./getPrototypeOf.js");
+var setPrototypeOf = require("./setPrototypeOf.js");
+var isNativeFunction = require("./isNativeFunction.js");
+var construct = require("./construct.js");
+function _wrapNativeSuper(t) {
+  var r = "function" == typeof Map ? new Map() : void 0;
+  return module.exports = _wrapNativeSuper = function _wrapNativeSuper(t) {
+    if (null === t || !isNativeFunction(t)) return t;
+    if ("function" != typeof t) throw new TypeError("Super expression must either be null or a function");
+    if (void 0 !== r) {
+      if (r.has(t)) return r.get(t);
+      r.set(t, Wrapper);
+    }
+    function Wrapper() {
+      return construct(t, arguments, getPrototypeOf(this).constructor);
+    }
+    return Wrapper.prototype = Object.create(t.prototype, {
+      constructor: {
+        value: Wrapper,
+        enumerable: !1,
+        writable: !0,
+        configurable: !0
+      }
+    }), setPrototypeOf(Wrapper, t);
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports, _wrapNativeSuper(t);
+}
+module.exports = _wrapNativeSuper, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/wrapRegExp.js b/mqtt-backend/node_modules/@babel/runtime/helpers/wrapRegExp.js
new file mode 100644
index 0000000..3d6e6ce
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/wrapRegExp.js
@@ -0,0 +1,52 @@
+var _typeof = require("./typeof.js")["default"];
+var setPrototypeOf = require("./setPrototypeOf.js");
+var inherits = require("./inherits.js");
+function _wrapRegExp() {
+  module.exports = _wrapRegExp = function _wrapRegExp(e, r) {
+    return new BabelRegExp(e, void 0, r);
+  }, module.exports.__esModule = true, module.exports["default"] = module.exports;
+  var e = RegExp.prototype,
+    r = new WeakMap();
+  function BabelRegExp(e, t, p) {
+    var o = RegExp(e, t);
+    return r.set(o, p || r.get(e)), setPrototypeOf(o, BabelRegExp.prototype);
+  }
+  function buildGroups(e, t) {
+    var p = r.get(t);
+    return Object.keys(p).reduce(function (r, t) {
+      var o = p[t];
+      if ("number" == typeof o) r[t] = e[o];else {
+        for (var i = 0; void 0 === e[o[i]] && i + 1 < o.length;) i++;
+        r[t] = e[o[i]];
+      }
+      return r;
+    }, Object.create(null));
+  }
+  return inherits(BabelRegExp, RegExp), BabelRegExp.prototype.exec = function (r) {
+    var t = e.exec.call(this, r);
+    if (t) {
+      t.groups = buildGroups(t, this);
+      var p = t.indices;
+      p && (p.groups = buildGroups(p, this));
+    }
+    return t;
+  }, BabelRegExp.prototype[Symbol.replace] = function (t, p) {
+    if ("string" == typeof p) {
+      var o = r.get(this);
+      return e[Symbol.replace].call(this, t, p.replace(/\$<([^>]+)(>|$)/g, function (e, r, t) {
+        if ("" === t) return e;
+        var p = o[r];
+        return Array.isArray(p) ? "$" + p.join("$") : "number" == typeof p ? "$" + p : "";
+      }));
+    }
+    if ("function" == typeof p) {
+      var i = this;
+      return e[Symbol.replace].call(this, t, function () {
+        var e = arguments;
+        return "object" != _typeof(e[e.length - 1]) && (e = [].slice.call(e)).push(buildGroups(e, i)), p.apply(this, e);
+      });
+    }
+    return e[Symbol.replace].call(this, t, p);
+  }, _wrapRegExp.apply(this, arguments);
+}
+module.exports = _wrapRegExp, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/helpers/writeOnlyError.js b/mqtt-backend/node_modules/@babel/runtime/helpers/writeOnlyError.js
new file mode 100644
index 0000000..c98ee82
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/helpers/writeOnlyError.js
@@ -0,0 +1,4 @@
+function _writeOnlyError(r) {
+  throw new TypeError('"' + r + '" is write-only');
+}
+module.exports = _writeOnlyError, module.exports.__esModule = true, module.exports["default"] = module.exports;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/package.json b/mqtt-backend/node_modules/@babel/runtime/package.json
new file mode 100644
index 0000000..3a37491
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/package.json
@@ -0,0 +1,1107 @@
+{
+  "name": "@babel/runtime",
+  "version": "7.29.2",
+  "description": "babel's modular runtime helpers",
+  "license": "MIT",
+  "publishConfig": {
+    "access": "public"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/babel/babel.git",
+    "directory": "packages/babel-runtime"
+  },
+  "homepage": "https://babel.dev/docs/en/next/babel-runtime",
+  "author": "The Babel Team (https://babel.dev/team)",
+  "exports": {
+    "./helpers/OverloadYield": [
+      {
+        "node": "./helpers/OverloadYield.js",
+        "import": "./helpers/esm/OverloadYield.js",
+        "default": "./helpers/OverloadYield.js"
+      },
+      "./helpers/OverloadYield.js"
+    ],
+    "./helpers/esm/OverloadYield": "./helpers/esm/OverloadYield.js",
+    "./helpers/applyDecoratedDescriptor": [
+      {
+        "node": "./helpers/applyDecoratedDescriptor.js",
+        "import": "./helpers/esm/applyDecoratedDescriptor.js",
+        "default": "./helpers/applyDecoratedDescriptor.js"
+      },
+      "./helpers/applyDecoratedDescriptor.js"
+    ],
+    "./helpers/esm/applyDecoratedDescriptor": "./helpers/esm/applyDecoratedDescriptor.js",
+    "./helpers/applyDecs2311": [
+      {
+        "node": "./helpers/applyDecs2311.js",
+        "import": "./helpers/esm/applyDecs2311.js",
+        "default": "./helpers/applyDecs2311.js"
+      },
+      "./helpers/applyDecs2311.js"
+    ],
+    "./helpers/esm/applyDecs2311": "./helpers/esm/applyDecs2311.js",
+    "./helpers/arrayLikeToArray": [
+      {
+        "node": "./helpers/arrayLikeToArray.js",
+        "import": "./helpers/esm/arrayLikeToArray.js",
+        "default": "./helpers/arrayLikeToArray.js"
+      },
+      "./helpers/arrayLikeToArray.js"
+    ],
+    "./helpers/esm/arrayLikeToArray": "./helpers/esm/arrayLikeToArray.js",
+    "./helpers/arrayWithHoles": [
+      {
+        "node": "./helpers/arrayWithHoles.js",
+        "import": "./helpers/esm/arrayWithHoles.js",
+        "default": "./helpers/arrayWithHoles.js"
+      },
+      "./helpers/arrayWithHoles.js"
+    ],
+    "./helpers/esm/arrayWithHoles": "./helpers/esm/arrayWithHoles.js",
+    "./helpers/arrayWithoutHoles": [
+      {
+        "node": "./helpers/arrayWithoutHoles.js",
+        "import": "./helpers/esm/arrayWithoutHoles.js",
+        "default": "./helpers/arrayWithoutHoles.js"
+      },
+      "./helpers/arrayWithoutHoles.js"
+    ],
+    "./helpers/esm/arrayWithoutHoles": "./helpers/esm/arrayWithoutHoles.js",
+    "./helpers/assertClassBrand": [
+      {
+        "node": "./helpers/assertClassBrand.js",
+        "import": "./helpers/esm/assertClassBrand.js",
+        "default": "./helpers/assertClassBrand.js"
+      },
+      "./helpers/assertClassBrand.js"
+    ],
+    "./helpers/esm/assertClassBrand": "./helpers/esm/assertClassBrand.js",
+    "./helpers/assertThisInitialized": [
+      {
+        "node": "./helpers/assertThisInitialized.js",
+        "import": "./helpers/esm/assertThisInitialized.js",
+        "default": "./helpers/assertThisInitialized.js"
+      },
+      "./helpers/assertThisInitialized.js"
+    ],
+    "./helpers/esm/assertThisInitialized": "./helpers/esm/assertThisInitialized.js",
+    "./helpers/asyncGeneratorDelegate": [
+      {
+        "node": "./helpers/asyncGeneratorDelegate.js",
+        "import": "./helpers/esm/asyncGeneratorDelegate.js",
+        "default": "./helpers/asyncGeneratorDelegate.js"
+      },
+      "./helpers/asyncGeneratorDelegate.js"
+    ],
+    "./helpers/esm/asyncGeneratorDelegate": "./helpers/esm/asyncGeneratorDelegate.js",
+    "./helpers/asyncIterator": [
+      {
+        "node": "./helpers/asyncIterator.js",
+        "import": "./helpers/esm/asyncIterator.js",
+        "default": "./helpers/asyncIterator.js"
+      },
+      "./helpers/asyncIterator.js"
+    ],
+    "./helpers/esm/asyncIterator": "./helpers/esm/asyncIterator.js",
+    "./helpers/asyncToGenerator": [
+      {
+        "node": "./helpers/asyncToGenerator.js",
+        "import": "./helpers/esm/asyncToGenerator.js",
+        "default": "./helpers/asyncToGenerator.js"
+      },
+      "./helpers/asyncToGenerator.js"
+    ],
+    "./helpers/esm/asyncToGenerator": "./helpers/esm/asyncToGenerator.js",
+    "./helpers/awaitAsyncGenerator": [
+      {
+        "node": "./helpers/awaitAsyncGenerator.js",
+        "import": "./helpers/esm/awaitAsyncGenerator.js",
+        "default": "./helpers/awaitAsyncGenerator.js"
+      },
+      "./helpers/awaitAsyncGenerator.js"
+    ],
+    "./helpers/esm/awaitAsyncGenerator": "./helpers/esm/awaitAsyncGenerator.js",
+    "./helpers/callSuper": [
+      {
+        "node": "./helpers/callSuper.js",
+        "import": "./helpers/esm/callSuper.js",
+        "default": "./helpers/callSuper.js"
+      },
+      "./helpers/callSuper.js"
+    ],
+    "./helpers/esm/callSuper": "./helpers/esm/callSuper.js",
+    "./helpers/checkInRHS": [
+      {
+        "node": "./helpers/checkInRHS.js",
+        "import": "./helpers/esm/checkInRHS.js",
+        "default": "./helpers/checkInRHS.js"
+      },
+      "./helpers/checkInRHS.js"
+    ],
+    "./helpers/esm/checkInRHS": "./helpers/esm/checkInRHS.js",
+    "./helpers/checkPrivateRedeclaration": [
+      {
+        "node": "./helpers/checkPrivateRedeclaration.js",
+        "import": "./helpers/esm/checkPrivateRedeclaration.js",
+        "default": "./helpers/checkPrivateRedeclaration.js"
+      },
+      "./helpers/checkPrivateRedeclaration.js"
+    ],
+    "./helpers/esm/checkPrivateRedeclaration": "./helpers/esm/checkPrivateRedeclaration.js",
+    "./helpers/classCallCheck": [
+      {
+        "node": "./helpers/classCallCheck.js",
+        "import": "./helpers/esm/classCallCheck.js",
+        "default": "./helpers/classCallCheck.js"
+      },
+      "./helpers/classCallCheck.js"
+    ],
+    "./helpers/esm/classCallCheck": "./helpers/esm/classCallCheck.js",
+    "./helpers/classNameTDZError": [
+      {
+        "node": "./helpers/classNameTDZError.js",
+        "import": "./helpers/esm/classNameTDZError.js",
+        "default": "./helpers/classNameTDZError.js"
+      },
+      "./helpers/classNameTDZError.js"
+    ],
+    "./helpers/esm/classNameTDZError": "./helpers/esm/classNameTDZError.js",
+    "./helpers/classPrivateFieldGet2": [
+      {
+        "node": "./helpers/classPrivateFieldGet2.js",
+        "import": "./helpers/esm/classPrivateFieldGet2.js",
+        "default": "./helpers/classPrivateFieldGet2.js"
+      },
+      "./helpers/classPrivateFieldGet2.js"
+    ],
+    "./helpers/esm/classPrivateFieldGet2": "./helpers/esm/classPrivateFieldGet2.js",
+    "./helpers/classPrivateFieldInitSpec": [
+      {
+        "node": "./helpers/classPrivateFieldInitSpec.js",
+        "import": "./helpers/esm/classPrivateFieldInitSpec.js",
+        "default": "./helpers/classPrivateFieldInitSpec.js"
+      },
+      "./helpers/classPrivateFieldInitSpec.js"
+    ],
+    "./helpers/esm/classPrivateFieldInitSpec": "./helpers/esm/classPrivateFieldInitSpec.js",
+    "./helpers/classPrivateFieldLooseBase": [
+      {
+        "node": "./helpers/classPrivateFieldLooseBase.js",
+        "import": "./helpers/esm/classPrivateFieldLooseBase.js",
+        "default": "./helpers/classPrivateFieldLooseBase.js"
+      },
+      "./helpers/classPrivateFieldLooseBase.js"
+    ],
+    "./helpers/esm/classPrivateFieldLooseBase": "./helpers/esm/classPrivateFieldLooseBase.js",
+    "./helpers/classPrivateFieldLooseKey": [
+      {
+        "node": "./helpers/classPrivateFieldLooseKey.js",
+        "import": "./helpers/esm/classPrivateFieldLooseKey.js",
+        "default": "./helpers/classPrivateFieldLooseKey.js"
+      },
+      "./helpers/classPrivateFieldLooseKey.js"
+    ],
+    "./helpers/esm/classPrivateFieldLooseKey": "./helpers/esm/classPrivateFieldLooseKey.js",
+    "./helpers/classPrivateFieldSet2": [
+      {
+        "node": "./helpers/classPrivateFieldSet2.js",
+        "import": "./helpers/esm/classPrivateFieldSet2.js",
+        "default": "./helpers/classPrivateFieldSet2.js"
+      },
+      "./helpers/classPrivateFieldSet2.js"
+    ],
+    "./helpers/esm/classPrivateFieldSet2": "./helpers/esm/classPrivateFieldSet2.js",
+    "./helpers/classPrivateGetter": [
+      {
+        "node": "./helpers/classPrivateGetter.js",
+        "import": "./helpers/esm/classPrivateGetter.js",
+        "default": "./helpers/classPrivateGetter.js"
+      },
+      "./helpers/classPrivateGetter.js"
+    ],
+    "./helpers/esm/classPrivateGetter": "./helpers/esm/classPrivateGetter.js",
+    "./helpers/classPrivateMethodInitSpec": [
+      {
+        "node": "./helpers/classPrivateMethodInitSpec.js",
+        "import": "./helpers/esm/classPrivateMethodInitSpec.js",
+        "default": "./helpers/classPrivateMethodInitSpec.js"
+      },
+      "./helpers/classPrivateMethodInitSpec.js"
+    ],
+    "./helpers/esm/classPrivateMethodInitSpec": "./helpers/esm/classPrivateMethodInitSpec.js",
+    "./helpers/classPrivateSetter": [
+      {
+        "node": "./helpers/classPrivateSetter.js",
+        "import": "./helpers/esm/classPrivateSetter.js",
+        "default": "./helpers/classPrivateSetter.js"
+      },
+      "./helpers/classPrivateSetter.js"
+    ],
+    "./helpers/esm/classPrivateSetter": "./helpers/esm/classPrivateSetter.js",
+    "./helpers/classStaticPrivateMethodGet": [
+      {
+        "node": "./helpers/classStaticPrivateMethodGet.js",
+        "import": "./helpers/esm/classStaticPrivateMethodGet.js",
+        "default": "./helpers/classStaticPrivateMethodGet.js"
+      },
+      "./helpers/classStaticPrivateMethodGet.js"
+    ],
+    "./helpers/esm/classStaticPrivateMethodGet": "./helpers/esm/classStaticPrivateMethodGet.js",
+    "./helpers/construct": [
+      {
+        "node": "./helpers/construct.js",
+        "import": "./helpers/esm/construct.js",
+        "default": "./helpers/construct.js"
+      },
+      "./helpers/construct.js"
+    ],
+    "./helpers/esm/construct": "./helpers/esm/construct.js",
+    "./helpers/createClass": [
+      {
+        "node": "./helpers/createClass.js",
+        "import": "./helpers/esm/createClass.js",
+        "default": "./helpers/createClass.js"
+      },
+      "./helpers/createClass.js"
+    ],
+    "./helpers/esm/createClass": "./helpers/esm/createClass.js",
+    "./helpers/createForOfIteratorHelper": [
+      {
+        "node": "./helpers/createForOfIteratorHelper.js",
+        "import": "./helpers/esm/createForOfIteratorHelper.js",
+        "default": "./helpers/createForOfIteratorHelper.js"
+      },
+      "./helpers/createForOfIteratorHelper.js"
+    ],
+    "./helpers/esm/createForOfIteratorHelper": "./helpers/esm/createForOfIteratorHelper.js",
+    "./helpers/createForOfIteratorHelperLoose": [
+      {
+        "node": "./helpers/createForOfIteratorHelperLoose.js",
+        "import": "./helpers/esm/createForOfIteratorHelperLoose.js",
+        "default": "./helpers/createForOfIteratorHelperLoose.js"
+      },
+      "./helpers/createForOfIteratorHelperLoose.js"
+    ],
+    "./helpers/esm/createForOfIteratorHelperLoose": "./helpers/esm/createForOfIteratorHelperLoose.js",
+    "./helpers/createSuper": [
+      {
+        "node": "./helpers/createSuper.js",
+        "import": "./helpers/esm/createSuper.js",
+        "default": "./helpers/createSuper.js"
+      },
+      "./helpers/createSuper.js"
+    ],
+    "./helpers/esm/createSuper": "./helpers/esm/createSuper.js",
+    "./helpers/decorate": [
+      {
+        "node": "./helpers/decorate.js",
+        "import": "./helpers/esm/decorate.js",
+        "default": "./helpers/decorate.js"
+      },
+      "./helpers/decorate.js"
+    ],
+    "./helpers/esm/decorate": "./helpers/esm/decorate.js",
+    "./helpers/defaults": [
+      {
+        "node": "./helpers/defaults.js",
+        "import": "./helpers/esm/defaults.js",
+        "default": "./helpers/defaults.js"
+      },
+      "./helpers/defaults.js"
+    ],
+    "./helpers/esm/defaults": "./helpers/esm/defaults.js",
+    "./helpers/defineAccessor": [
+      {
+        "node": "./helpers/defineAccessor.js",
+        "import": "./helpers/esm/defineAccessor.js",
+        "default": "./helpers/defineAccessor.js"
+      },
+      "./helpers/defineAccessor.js"
+    ],
+    "./helpers/esm/defineAccessor": "./helpers/esm/defineAccessor.js",
+    "./helpers/defineProperty": [
+      {
+        "node": "./helpers/defineProperty.js",
+        "import": "./helpers/esm/defineProperty.js",
+        "default": "./helpers/defineProperty.js"
+      },
+      "./helpers/defineProperty.js"
+    ],
+    "./helpers/esm/defineProperty": "./helpers/esm/defineProperty.js",
+    "./helpers/extends": [
+      {
+        "node": "./helpers/extends.js",
+        "import": "./helpers/esm/extends.js",
+        "default": "./helpers/extends.js"
+      },
+      "./helpers/extends.js"
+    ],
+    "./helpers/esm/extends": "./helpers/esm/extends.js",
+    "./helpers/get": [
+      {
+        "node": "./helpers/get.js",
+        "import": "./helpers/esm/get.js",
+        "default": "./helpers/get.js"
+      },
+      "./helpers/get.js"
+    ],
+    "./helpers/esm/get": "./helpers/esm/get.js",
+    "./helpers/getPrototypeOf": [
+      {
+        "node": "./helpers/getPrototypeOf.js",
+        "import": "./helpers/esm/getPrototypeOf.js",
+        "default": "./helpers/getPrototypeOf.js"
+      },
+      "./helpers/getPrototypeOf.js"
+    ],
+    "./helpers/esm/getPrototypeOf": "./helpers/esm/getPrototypeOf.js",
+    "./helpers/identity": [
+      {
+        "node": "./helpers/identity.js",
+        "import": "./helpers/esm/identity.js",
+        "default": "./helpers/identity.js"
+      },
+      "./helpers/identity.js"
+    ],
+    "./helpers/esm/identity": "./helpers/esm/identity.js",
+    "./helpers/importDeferProxy": [
+      {
+        "node": "./helpers/importDeferProxy.js",
+        "import": "./helpers/esm/importDeferProxy.js",
+        "default": "./helpers/importDeferProxy.js"
+      },
+      "./helpers/importDeferProxy.js"
+    ],
+    "./helpers/esm/importDeferProxy": "./helpers/esm/importDeferProxy.js",
+    "./helpers/inherits": [
+      {
+        "node": "./helpers/inherits.js",
+        "import": "./helpers/esm/inherits.js",
+        "default": "./helpers/inherits.js"
+      },
+      "./helpers/inherits.js"
+    ],
+    "./helpers/esm/inherits": "./helpers/esm/inherits.js",
+    "./helpers/inheritsLoose": [
+      {
+        "node": "./helpers/inheritsLoose.js",
+        "import": "./helpers/esm/inheritsLoose.js",
+        "default": "./helpers/inheritsLoose.js"
+      },
+      "./helpers/inheritsLoose.js"
+    ],
+    "./helpers/esm/inheritsLoose": "./helpers/esm/inheritsLoose.js",
+    "./helpers/initializerDefineProperty": [
+      {
+        "node": "./helpers/initializerDefineProperty.js",
+        "import": "./helpers/esm/initializerDefineProperty.js",
+        "default": "./helpers/initializerDefineProperty.js"
+      },
+      "./helpers/initializerDefineProperty.js"
+    ],
+    "./helpers/esm/initializerDefineProperty": "./helpers/esm/initializerDefineProperty.js",
+    "./helpers/initializerWarningHelper": [
+      {
+        "node": "./helpers/initializerWarningHelper.js",
+        "import": "./helpers/esm/initializerWarningHelper.js",
+        "default": "./helpers/initializerWarningHelper.js"
+      },
+      "./helpers/initializerWarningHelper.js"
+    ],
+    "./helpers/esm/initializerWarningHelper": "./helpers/esm/initializerWarningHelper.js",
+    "./helpers/instanceof": [
+      {
+        "node": "./helpers/instanceof.js",
+        "import": "./helpers/esm/instanceof.js",
+        "default": "./helpers/instanceof.js"
+      },
+      "./helpers/instanceof.js"
+    ],
+    "./helpers/esm/instanceof": "./helpers/esm/instanceof.js",
+    "./helpers/interopRequireDefault": [
+      {
+        "node": "./helpers/interopRequireDefault.js",
+        "import": "./helpers/esm/interopRequireDefault.js",
+        "default": "./helpers/interopRequireDefault.js"
+      },
+      "./helpers/interopRequireDefault.js"
+    ],
+    "./helpers/esm/interopRequireDefault": "./helpers/esm/interopRequireDefault.js",
+    "./helpers/interopRequireWildcard": [
+      {
+        "node": "./helpers/interopRequireWildcard.js",
+        "import": "./helpers/esm/interopRequireWildcard.js",
+        "default": "./helpers/interopRequireWildcard.js"
+      },
+      "./helpers/interopRequireWildcard.js"
+    ],
+    "./helpers/esm/interopRequireWildcard": "./helpers/esm/interopRequireWildcard.js",
+    "./helpers/isNativeFunction": [
+      {
+        "node": "./helpers/isNativeFunction.js",
+        "import": "./helpers/esm/isNativeFunction.js",
+        "default": "./helpers/isNativeFunction.js"
+      },
+      "./helpers/isNativeFunction.js"
+    ],
+    "./helpers/esm/isNativeFunction": "./helpers/esm/isNativeFunction.js",
+    "./helpers/isNativeReflectConstruct": [
+      {
+        "node": "./helpers/isNativeReflectConstruct.js",
+        "import": "./helpers/esm/isNativeReflectConstruct.js",
+        "default": "./helpers/isNativeReflectConstruct.js"
+      },
+      "./helpers/isNativeReflectConstruct.js"
+    ],
+    "./helpers/esm/isNativeReflectConstruct": "./helpers/esm/isNativeReflectConstruct.js",
+    "./helpers/iterableToArray": [
+      {
+        "node": "./helpers/iterableToArray.js",
+        "import": "./helpers/esm/iterableToArray.js",
+        "default": "./helpers/iterableToArray.js"
+      },
+      "./helpers/iterableToArray.js"
+    ],
+    "./helpers/esm/iterableToArray": "./helpers/esm/iterableToArray.js",
+    "./helpers/iterableToArrayLimit": [
+      {
+        "node": "./helpers/iterableToArrayLimit.js",
+        "import": "./helpers/esm/iterableToArrayLimit.js",
+        "default": "./helpers/iterableToArrayLimit.js"
+      },
+      "./helpers/iterableToArrayLimit.js"
+    ],
+    "./helpers/esm/iterableToArrayLimit": "./helpers/esm/iterableToArrayLimit.js",
+    "./helpers/jsx": [
+      {
+        "node": "./helpers/jsx.js",
+        "import": "./helpers/esm/jsx.js",
+        "default": "./helpers/jsx.js"
+      },
+      "./helpers/jsx.js"
+    ],
+    "./helpers/esm/jsx": "./helpers/esm/jsx.js",
+    "./helpers/maybeArrayLike": [
+      {
+        "node": "./helpers/maybeArrayLike.js",
+        "import": "./helpers/esm/maybeArrayLike.js",
+        "default": "./helpers/maybeArrayLike.js"
+      },
+      "./helpers/maybeArrayLike.js"
+    ],
+    "./helpers/esm/maybeArrayLike": "./helpers/esm/maybeArrayLike.js",
+    "./helpers/newArrowCheck": [
+      {
+        "node": "./helpers/newArrowCheck.js",
+        "import": "./helpers/esm/newArrowCheck.js",
+        "default": "./helpers/newArrowCheck.js"
+      },
+      "./helpers/newArrowCheck.js"
+    ],
+    "./helpers/esm/newArrowCheck": "./helpers/esm/newArrowCheck.js",
+    "./helpers/nonIterableRest": [
+      {
+        "node": "./helpers/nonIterableRest.js",
+        "import": "./helpers/esm/nonIterableRest.js",
+        "default": "./helpers/nonIterableRest.js"
+      },
+      "./helpers/nonIterableRest.js"
+    ],
+    "./helpers/esm/nonIterableRest": "./helpers/esm/nonIterableRest.js",
+    "./helpers/nonIterableSpread": [
+      {
+        "node": "./helpers/nonIterableSpread.js",
+        "import": "./helpers/esm/nonIterableSpread.js",
+        "default": "./helpers/nonIterableSpread.js"
+      },
+      "./helpers/nonIterableSpread.js"
+    ],
+    "./helpers/esm/nonIterableSpread": "./helpers/esm/nonIterableSpread.js",
+    "./helpers/nullishReceiverError": [
+      {
+        "node": "./helpers/nullishReceiverError.js",
+        "import": "./helpers/esm/nullishReceiverError.js",
+        "default": "./helpers/nullishReceiverError.js"
+      },
+      "./helpers/nullishReceiverError.js"
+    ],
+    "./helpers/esm/nullishReceiverError": "./helpers/esm/nullishReceiverError.js",
+    "./helpers/objectDestructuringEmpty": [
+      {
+        "node": "./helpers/objectDestructuringEmpty.js",
+        "import": "./helpers/esm/objectDestructuringEmpty.js",
+        "default": "./helpers/objectDestructuringEmpty.js"
+      },
+      "./helpers/objectDestructuringEmpty.js"
+    ],
+    "./helpers/esm/objectDestructuringEmpty": "./helpers/esm/objectDestructuringEmpty.js",
+    "./helpers/objectSpread2": [
+      {
+        "node": "./helpers/objectSpread2.js",
+        "import": "./helpers/esm/objectSpread2.js",
+        "default": "./helpers/objectSpread2.js"
+      },
+      "./helpers/objectSpread2.js"
+    ],
+    "./helpers/esm/objectSpread2": "./helpers/esm/objectSpread2.js",
+    "./helpers/objectWithoutProperties": [
+      {
+        "node": "./helpers/objectWithoutProperties.js",
+        "import": "./helpers/esm/objectWithoutProperties.js",
+        "default": "./helpers/objectWithoutProperties.js"
+      },
+      "./helpers/objectWithoutProperties.js"
+    ],
+    "./helpers/esm/objectWithoutProperties": "./helpers/esm/objectWithoutProperties.js",
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+        "default": "./helpers/regenerator.js"
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+        "import": "./helpers/esm/regeneratorAsyncGen.js",
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+        "default": "./helpers/regeneratorKeys.js"
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+        "import": "./helpers/esm/regeneratorValues.js",
+        "default": "./helpers/regeneratorValues.js"
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+        "default": "./helpers/setFunctionName.js"
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+        "default": "./helpers/setPrototypeOf.js"
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+        "default": "./helpers/slicedToArray.js"
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+        "import": "./helpers/esm/superPropBase.js",
+        "default": "./helpers/superPropBase.js"
+      },
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+        "import": "./helpers/esm/superPropGet.js",
+        "default": "./helpers/superPropGet.js"
+      },
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+    ],
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+        "import": "./helpers/esm/superPropSet.js",
+        "default": "./helpers/superPropSet.js"
+      },
+      "./helpers/superPropSet.js"
+    ],
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+        "import": "./helpers/esm/taggedTemplateLiteral.js",
+        "default": "./helpers/taggedTemplateLiteral.js"
+      },
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+    "./helpers/taggedTemplateLiteralLoose": [
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+        "import": "./helpers/esm/taggedTemplateLiteralLoose.js",
+        "default": "./helpers/taggedTemplateLiteralLoose.js"
+      },
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+    ],
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+        "node": "./helpers/tdz.js",
+        "import": "./helpers/esm/tdz.js",
+        "default": "./helpers/tdz.js"
+      },
+      "./helpers/tdz.js"
+    ],
+    "./helpers/esm/tdz": "./helpers/esm/tdz.js",
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+        "import": "./helpers/esm/temporalRef.js",
+        "default": "./helpers/temporalRef.js"
+      },
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+    ],
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+        "import": "./helpers/esm/temporalUndefined.js",
+        "default": "./helpers/temporalUndefined.js"
+      },
+      "./helpers/temporalUndefined.js"
+    ],
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+        "import": "./helpers/esm/toArray.js",
+        "default": "./helpers/toArray.js"
+      },
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+    ],
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+    "./helpers/toConsumableArray": [
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+        "node": "./helpers/toConsumableArray.js",
+        "import": "./helpers/esm/toConsumableArray.js",
+        "default": "./helpers/toConsumableArray.js"
+      },
+      "./helpers/toConsumableArray.js"
+    ],
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+    "./helpers/toPrimitive": [
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+        "import": "./helpers/esm/toPrimitive.js",
+        "default": "./helpers/toPrimitive.js"
+      },
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+    ],
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+        "node": "./helpers/toPropertyKey.js",
+        "import": "./helpers/esm/toPropertyKey.js",
+        "default": "./helpers/toPropertyKey.js"
+      },
+      "./helpers/toPropertyKey.js"
+    ],
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+    "./helpers/toSetter": [
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+        "import": "./helpers/esm/toSetter.js",
+        "default": "./helpers/toSetter.js"
+      },
+      "./helpers/toSetter.js"
+    ],
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+    "./helpers/tsRewriteRelativeImportExtensions": [
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+        "import": "./helpers/esm/tsRewriteRelativeImportExtensions.js",
+        "default": "./helpers/tsRewriteRelativeImportExtensions.js"
+      },
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+    ],
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+    "./helpers/typeof": [
+      {
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+        "import": "./helpers/esm/typeof.js",
+        "default": "./helpers/typeof.js"
+      },
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+    ],
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+        "import": "./helpers/esm/unsupportedIterableToArray.js",
+        "default": "./helpers/unsupportedIterableToArray.js"
+      },
+      "./helpers/unsupportedIterableToArray.js"
+    ],
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+    "./helpers/usingCtx": [
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+        "node": "./helpers/usingCtx.js",
+        "import": "./helpers/esm/usingCtx.js",
+        "default": "./helpers/usingCtx.js"
+      },
+      "./helpers/usingCtx.js"
+    ],
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+    "./helpers/wrapAsyncGenerator": [
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+        "node": "./helpers/wrapAsyncGenerator.js",
+        "import": "./helpers/esm/wrapAsyncGenerator.js",
+        "default": "./helpers/wrapAsyncGenerator.js"
+      },
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+    ],
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+        "import": "./helpers/esm/wrapNativeSuper.js",
+        "default": "./helpers/wrapNativeSuper.js"
+      },
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+    ],
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+        "import": "./helpers/esm/wrapRegExp.js",
+        "default": "./helpers/wrapRegExp.js"
+      },
+      "./helpers/wrapRegExp.js"
+    ],
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+        "import": "./helpers/esm/writeOnlyError.js",
+        "default": "./helpers/writeOnlyError.js"
+      },
+      "./helpers/writeOnlyError.js"
+    ],
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+    "./helpers/AwaitValue": [
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+        "import": "./helpers/esm/AwaitValue.js",
+        "default": "./helpers/AwaitValue.js"
+      },
+      "./helpers/AwaitValue.js"
+    ],
+    "./helpers/esm/AwaitValue": "./helpers/esm/AwaitValue.js",
+    "./helpers/applyDecs": [
+      {
+        "node": "./helpers/applyDecs.js",
+        "import": "./helpers/esm/applyDecs.js",
+        "default": "./helpers/applyDecs.js"
+      },
+      "./helpers/applyDecs.js"
+    ],
+    "./helpers/esm/applyDecs": "./helpers/esm/applyDecs.js",
+    "./helpers/applyDecs2203": [
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+        "import": "./helpers/esm/applyDecs2203.js",
+        "default": "./helpers/applyDecs2203.js"
+      },
+      "./helpers/applyDecs2203.js"
+    ],
+    "./helpers/esm/applyDecs2203": "./helpers/esm/applyDecs2203.js",
+    "./helpers/applyDecs2203R": [
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+        "node": "./helpers/applyDecs2203R.js",
+        "import": "./helpers/esm/applyDecs2203R.js",
+        "default": "./helpers/applyDecs2203R.js"
+      },
+      "./helpers/applyDecs2203R.js"
+    ],
+    "./helpers/esm/applyDecs2203R": "./helpers/esm/applyDecs2203R.js",
+    "./helpers/applyDecs2301": [
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+        "node": "./helpers/applyDecs2301.js",
+        "import": "./helpers/esm/applyDecs2301.js",
+        "default": "./helpers/applyDecs2301.js"
+      },
+      "./helpers/applyDecs2301.js"
+    ],
+    "./helpers/esm/applyDecs2301": "./helpers/esm/applyDecs2301.js",
+    "./helpers/applyDecs2305": [
+      {
+        "node": "./helpers/applyDecs2305.js",
+        "import": "./helpers/esm/applyDecs2305.js",
+        "default": "./helpers/applyDecs2305.js"
+      },
+      "./helpers/applyDecs2305.js"
+    ],
+    "./helpers/esm/applyDecs2305": "./helpers/esm/applyDecs2305.js",
+    "./helpers/classApplyDescriptorDestructureSet": [
+      {
+        "node": "./helpers/classApplyDescriptorDestructureSet.js",
+        "import": "./helpers/esm/classApplyDescriptorDestructureSet.js",
+        "default": "./helpers/classApplyDescriptorDestructureSet.js"
+      },
+      "./helpers/classApplyDescriptorDestructureSet.js"
+    ],
+    "./helpers/esm/classApplyDescriptorDestructureSet": "./helpers/esm/classApplyDescriptorDestructureSet.js",
+    "./helpers/classApplyDescriptorGet": [
+      {
+        "node": "./helpers/classApplyDescriptorGet.js",
+        "import": "./helpers/esm/classApplyDescriptorGet.js",
+        "default": "./helpers/classApplyDescriptorGet.js"
+      },
+      "./helpers/classApplyDescriptorGet.js"
+    ],
+    "./helpers/esm/classApplyDescriptorGet": "./helpers/esm/classApplyDescriptorGet.js",
+    "./helpers/classApplyDescriptorSet": [
+      {
+        "node": "./helpers/classApplyDescriptorSet.js",
+        "import": "./helpers/esm/classApplyDescriptorSet.js",
+        "default": "./helpers/classApplyDescriptorSet.js"
+      },
+      "./helpers/classApplyDescriptorSet.js"
+    ],
+    "./helpers/esm/classApplyDescriptorSet": "./helpers/esm/classApplyDescriptorSet.js",
+    "./helpers/classCheckPrivateStaticAccess": [
+      {
+        "node": "./helpers/classCheckPrivateStaticAccess.js",
+        "import": "./helpers/esm/classCheckPrivateStaticAccess.js",
+        "default": "./helpers/classCheckPrivateStaticAccess.js"
+      },
+      "./helpers/classCheckPrivateStaticAccess.js"
+    ],
+    "./helpers/esm/classCheckPrivateStaticAccess": "./helpers/esm/classCheckPrivateStaticAccess.js",
+    "./helpers/classCheckPrivateStaticFieldDescriptor": [
+      {
+        "node": "./helpers/classCheckPrivateStaticFieldDescriptor.js",
+        "import": "./helpers/esm/classCheckPrivateStaticFieldDescriptor.js",
+        "default": "./helpers/classCheckPrivateStaticFieldDescriptor.js"
+      },
+      "./helpers/classCheckPrivateStaticFieldDescriptor.js"
+    ],
+    "./helpers/esm/classCheckPrivateStaticFieldDescriptor": "./helpers/esm/classCheckPrivateStaticFieldDescriptor.js",
+    "./helpers/classExtractFieldDescriptor": [
+      {
+        "node": "./helpers/classExtractFieldDescriptor.js",
+        "import": "./helpers/esm/classExtractFieldDescriptor.js",
+        "default": "./helpers/classExtractFieldDescriptor.js"
+      },
+      "./helpers/classExtractFieldDescriptor.js"
+    ],
+    "./helpers/esm/classExtractFieldDescriptor": "./helpers/esm/classExtractFieldDescriptor.js",
+    "./helpers/classPrivateFieldDestructureSet": [
+      {
+        "node": "./helpers/classPrivateFieldDestructureSet.js",
+        "import": "./helpers/esm/classPrivateFieldDestructureSet.js",
+        "default": "./helpers/classPrivateFieldDestructureSet.js"
+      },
+      "./helpers/classPrivateFieldDestructureSet.js"
+    ],
+    "./helpers/esm/classPrivateFieldDestructureSet": "./helpers/esm/classPrivateFieldDestructureSet.js",
+    "./helpers/classPrivateFieldGet": [
+      {
+        "node": "./helpers/classPrivateFieldGet.js",
+        "import": "./helpers/esm/classPrivateFieldGet.js",
+        "default": "./helpers/classPrivateFieldGet.js"
+      },
+      "./helpers/classPrivateFieldGet.js"
+    ],
+    "./helpers/esm/classPrivateFieldGet": "./helpers/esm/classPrivateFieldGet.js",
+    "./helpers/classPrivateFieldSet": [
+      {
+        "node": "./helpers/classPrivateFieldSet.js",
+        "import": "./helpers/esm/classPrivateFieldSet.js",
+        "default": "./helpers/classPrivateFieldSet.js"
+      },
+      "./helpers/classPrivateFieldSet.js"
+    ],
+    "./helpers/esm/classPrivateFieldSet": "./helpers/esm/classPrivateFieldSet.js",
+    "./helpers/classPrivateMethodGet": [
+      {
+        "node": "./helpers/classPrivateMethodGet.js",
+        "import": "./helpers/esm/classPrivateMethodGet.js",
+        "default": "./helpers/classPrivateMethodGet.js"
+      },
+      "./helpers/classPrivateMethodGet.js"
+    ],
+    "./helpers/esm/classPrivateMethodGet": "./helpers/esm/classPrivateMethodGet.js",
+    "./helpers/classPrivateMethodSet": [
+      {
+        "node": "./helpers/classPrivateMethodSet.js",
+        "import": "./helpers/esm/classPrivateMethodSet.js",
+        "default": "./helpers/classPrivateMethodSet.js"
+      },
+      "./helpers/classPrivateMethodSet.js"
+    ],
+    "./helpers/esm/classPrivateMethodSet": "./helpers/esm/classPrivateMethodSet.js",
+    "./helpers/classStaticPrivateFieldDestructureSet": [
+      {
+        "node": "./helpers/classStaticPrivateFieldDestructureSet.js",
+        "import": "./helpers/esm/classStaticPrivateFieldDestructureSet.js",
+        "default": "./helpers/classStaticPrivateFieldDestructureSet.js"
+      },
+      "./helpers/classStaticPrivateFieldDestructureSet.js"
+    ],
+    "./helpers/esm/classStaticPrivateFieldDestructureSet": "./helpers/esm/classStaticPrivateFieldDestructureSet.js",
+    "./helpers/classStaticPrivateFieldSpecGet": [
+      {
+        "node": "./helpers/classStaticPrivateFieldSpecGet.js",
+        "import": "./helpers/esm/classStaticPrivateFieldSpecGet.js",
+        "default": "./helpers/classStaticPrivateFieldSpecGet.js"
+      },
+      "./helpers/classStaticPrivateFieldSpecGet.js"
+    ],
+    "./helpers/esm/classStaticPrivateFieldSpecGet": "./helpers/esm/classStaticPrivateFieldSpecGet.js",
+    "./helpers/classStaticPrivateFieldSpecSet": [
+      {
+        "node": "./helpers/classStaticPrivateFieldSpecSet.js",
+        "import": "./helpers/esm/classStaticPrivateFieldSpecSet.js",
+        "default": "./helpers/classStaticPrivateFieldSpecSet.js"
+      },
+      "./helpers/classStaticPrivateFieldSpecSet.js"
+    ],
+    "./helpers/esm/classStaticPrivateFieldSpecSet": "./helpers/esm/classStaticPrivateFieldSpecSet.js",
+    "./helpers/classStaticPrivateMethodSet": [
+      {
+        "node": "./helpers/classStaticPrivateMethodSet.js",
+        "import": "./helpers/esm/classStaticPrivateMethodSet.js",
+        "default": "./helpers/classStaticPrivateMethodSet.js"
+      },
+      "./helpers/classStaticPrivateMethodSet.js"
+    ],
+    "./helpers/esm/classStaticPrivateMethodSet": "./helpers/esm/classStaticPrivateMethodSet.js",
+    "./helpers/defineEnumerableProperties": [
+      {
+        "node": "./helpers/defineEnumerableProperties.js",
+        "import": "./helpers/esm/defineEnumerableProperties.js",
+        "default": "./helpers/defineEnumerableProperties.js"
+      },
+      "./helpers/defineEnumerableProperties.js"
+    ],
+    "./helpers/esm/defineEnumerableProperties": "./helpers/esm/defineEnumerableProperties.js",
+    "./helpers/dispose": [
+      {
+        "node": "./helpers/dispose.js",
+        "import": "./helpers/esm/dispose.js",
+        "default": "./helpers/dispose.js"
+      },
+      "./helpers/dispose.js"
+    ],
+    "./helpers/esm/dispose": "./helpers/esm/dispose.js",
+    "./helpers/objectSpread": [
+      {
+        "node": "./helpers/objectSpread.js",
+        "import": "./helpers/esm/objectSpread.js",
+        "default": "./helpers/objectSpread.js"
+      },
+      "./helpers/objectSpread.js"
+    ],
+    "./helpers/esm/objectSpread": "./helpers/esm/objectSpread.js",
+    "./helpers/regeneratorRuntime": [
+      {
+        "node": "./helpers/regeneratorRuntime.js",
+        "import": "./helpers/esm/regeneratorRuntime.js",
+        "default": "./helpers/regeneratorRuntime.js"
+      },
+      "./helpers/regeneratorRuntime.js"
+    ],
+    "./helpers/esm/regeneratorRuntime": "./helpers/esm/regeneratorRuntime.js",
+    "./helpers/using": [
+      {
+        "node": "./helpers/using.js",
+        "import": "./helpers/esm/using.js",
+        "default": "./helpers/using.js"
+      },
+      "./helpers/using.js"
+    ],
+    "./helpers/esm/using": "./helpers/esm/using.js",
+    "./package": "./package.json",
+    "./package.json": "./package.json",
+    "./regenerator": "./regenerator/index.js",
+    "./regenerator/*.js": "./regenerator/*.js",
+    "./regenerator/": "./regenerator/"
+  },
+  "engines": {
+    "node": ">=6.9.0"
+  },
+  "type": "commonjs"
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@babel/runtime/regenerator/index.js b/mqtt-backend/node_modules/@babel/runtime/regenerator/index.js
new file mode 100644
index 0000000..5881357
--- /dev/null
+++ b/mqtt-backend/node_modules/@babel/runtime/regenerator/index.js
@@ -0,0 +1,15 @@
+// TODO(Babel 8): Remove this file.
+
+var runtime = require("../helpers/regeneratorRuntime")();
+module.exports = runtime;
+
+// Copied from https://github.com/facebook/regenerator/blob/main/packages/runtime/runtime.js#L736=
+try {
+  regeneratorRuntime = runtime;
+} catch (accidentalStrictMode) {
+  if (typeof globalThis === "object") {
+    globalThis.regeneratorRuntime = runtime;
+  } else {
+    Function("r", "regeneratorRuntime = r")(runtime);
+  }
+}
diff --git a/mqtt-backend/node_modules/@types/node/LICENSE b/mqtt-backend/node_modules/@types/node/LICENSE
new file mode 100644
index 0000000..9e841e7
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/LICENSE
@@ -0,0 +1,21 @@
+    MIT License
+
+    Copyright (c) Microsoft Corporation.
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE
diff --git a/mqtt-backend/node_modules/@types/node/README.md b/mqtt-backend/node_modules/@types/node/README.md
new file mode 100644
index 0000000..83c5c7b
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/README.md
@@ -0,0 +1,15 @@
+# Installation
+> `npm install --save @types/node`
+
+# Summary
+This package contains type definitions for node (https://nodejs.org/).
+
+# Details
+Files were exported from https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/node.
+
+### Additional Details
+ * Last updated: Fri, 10 Apr 2026 03:39:58 GMT
+ * Dependencies: [undici-types](https://npmjs.com/package/undici-types)
+
+# Credits
+These definitions were written by [Microsoft TypeScript](https://github.com/Microsoft), [Alberto Schiabel](https://github.com/jkomyno), [Andrew Makarov](https://github.com/r3nya), [Benjamin Toueg](https://github.com/btoueg), [David Junger](https://github.com/touffy), [Mohsen Azimi](https://github.com/mohsen1), [Nikita Galkin](https://github.com/galkin), [Sebastian Silbermann](https://github.com/eps1lon), [Wilco Bakker](https://github.com/WilcoBakker), [Marcin Kopacz](https://github.com/chyzwar), [Trivikram Kamat](https://github.com/trivikr), [Junxiao Shi](https://github.com/yoursunny), [Ilia Baryshnikov](https://github.com/qwelias), [ExE Boss](https://github.com/ExE-Boss), [Piotr Błażejewicz](https://github.com/peterblazejewicz), [Anna Henningsen](https://github.com/addaleax), [Victor Perin](https://github.com/victorperin), [NodeJS Contributors](https://github.com/NodeJS), [Linus Unnebäck](https://github.com/LinusU), [wafuwafu13](https://github.com/wafuwafu13), [Matteo Collina](https://github.com/mcollina), [Dmitry Semigradsky](https://github.com/Semigradsky), [René](https://github.com/Renegade334), and [Yagiz Nizipli](https://github.com/anonrig).
diff --git a/mqtt-backend/node_modules/@types/node/assert.d.ts b/mqtt-backend/node_modules/@types/node/assert.d.ts
new file mode 100644
index 0000000..c4cc77e
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/assert.d.ts
@@ -0,0 +1,950 @@
+declare module "node:assert" {
+    import strict = require("node:assert/strict");
+    /**
+     * An alias of {@link assert.ok}.
+     * @since v0.5.9
+     * @param value The input that is checked for being truthy.
+     */
+    function assert(value: unknown, message?: string | Error): asserts value;
+    const kOptions: unique symbol;
+    namespace assert {
+        type AssertMethodNames =
+            | "deepEqual"
+            | "deepStrictEqual"
+            | "doesNotMatch"
+            | "doesNotReject"
+            | "doesNotThrow"
+            | "equal"
+            | "fail"
+            | "ifError"
+            | "match"
+            | "notDeepEqual"
+            | "notDeepStrictEqual"
+            | "notEqual"
+            | "notStrictEqual"
+            | "ok"
+            | "partialDeepStrictEqual"
+            | "rejects"
+            | "strictEqual"
+            | "throws";
+        interface AssertOptions {
+            /**
+             * If set to `'full'`, shows the full diff in assertion errors.
+             * @default 'simple'
+             */
+            diff?: "simple" | "full" | undefined;
+            /**
+             * If set to `true`, non-strict methods behave like their
+             * corresponding strict methods.
+             * @default true
+             */
+            strict?: boolean | undefined;
+            /**
+             * If set to `true`, skips prototype and constructor
+             * comparison in deep equality checks.
+             * @since v24.9.0
+             * @default false
+             */
+            skipPrototype?: boolean | undefined;
+        }
+        interface Assert extends Pick<typeof assert, AssertMethodNames> {
+            readonly [kOptions]: AssertOptions & { strict: false };
+        }
+        interface AssertStrict extends Pick<typeof strict, AssertMethodNames> {
+            readonly [kOptions]: AssertOptions & { strict: true };
+        }
+        /**
+         * The `Assert` class allows creating independent assertion instances with custom options.
+         * @since v24.6.0
+         */
+        var Assert: {
+            /**
+             * Creates a new assertion instance. The `diff` option controls the verbosity of diffs in assertion error messages.
+             *
+             * ```js
+             * const { Assert } = require('node:assert');
+             * const assertInstance = new Assert({ diff: 'full' });
+             * assertInstance.deepStrictEqual({ a: 1 }, { a: 2 });
+             * // Shows a full diff in the error message.
+             * ```
+             *
+             * **Important**: When destructuring assertion methods from an `Assert` instance,
+             * the methods lose their connection to the instance's configuration options (such
+             * as `diff`, `strict`, and `skipPrototype` settings).
+             * The destructured methods will fall back to default behavior instead.
+             *
+             * ```js
+             * const myAssert = new Assert({ diff: 'full' });
+             *
+             * // This works as expected - uses 'full' diff
+             * myAssert.strictEqual({ a: 1 }, { b: { c: 1 } });
+             *
+             * // This loses the 'full' diff setting - falls back to default 'simple' diff
+             * const { strictEqual } = myAssert;
+             * strictEqual({ a: 1 }, { b: { c: 1 } });
+             * ```
+             *
+             * The `skipPrototype` option affects all deep equality methods:
+             *
+             * ```js
+             * class Foo {
+             *   constructor(a) {
+             *     this.a = a;
+             *   }
+             * }
+             *
+             * class Bar {
+             *   constructor(a) {
+             *     this.a = a;
+             *   }
+             * }
+             *
+             * const foo = new Foo(1);
+             * const bar = new Bar(1);
+             *
+             * // Default behavior - fails due to different constructors
+             * const assert1 = new Assert();
+             * assert1.deepStrictEqual(foo, bar); // AssertionError
+             *
+             * // Skip prototype comparison - passes if properties are equal
+             * const assert2 = new Assert({ skipPrototype: true });
+             * assert2.deepStrictEqual(foo, bar); // OK
+             * ```
+             *
+             * When destructured, methods lose access to the instance's `this` context and revert to default assertion behavior
+             * (diff: 'simple', non-strict mode).
+             * To maintain custom options when using destructured methods, avoid
+             * destructuring and call methods directly on the instance.
+             * @since v24.6.0
+             */
+            new(
+                options?: AssertOptions & { strict?: true | undefined },
+            ): AssertStrict;
+            new(
+                options: AssertOptions,
+            ): Assert;
+        };
+        interface AssertionErrorOptions {
+            /**
+             * If provided, the error message is set to this value.
+             */
+            message?: string | undefined;
+            /**
+             * The `actual` property on the error instance.
+             */
+            actual?: unknown;
+            /**
+             * The `expected` property on the error instance.
+             */
+            expected?: unknown;
+            /**
+             * The `operator` property on the error instance.
+             */
+            operator?: string | undefined;
+            /**
+             * If provided, the generated stack trace omits frames before this function.
+             */
+            stackStartFn?: Function | undefined;
+            /**
+             * If set to `'full'`, shows the full diff in assertion errors.
+             * @default 'simple'
+             */
+            diff?: "simple" | "full" | undefined;
+        }
+        /**
+         * Indicates the failure of an assertion. All errors thrown by the `node:assert` module will be instances of the `AssertionError` class.
+         */
+        class AssertionError extends Error {
+            constructor(options: AssertionErrorOptions);
+            /**
+             * Set to the `actual` argument for methods such as {@link assert.strictEqual()}.
+             */
+            actual: unknown;
+            /**
+             * Set to the `expected` argument for methods such as {@link assert.strictEqual()}.
+             */
+            expected: unknown;
+            /**
+             * Indicates if the message was auto-generated (`true`) or not.
+             */
+            generatedMessage: boolean;
+            /**
+             * Value is always `ERR_ASSERTION` to show that the error is an assertion error.
+             */
+            code: "ERR_ASSERTION";
+            /**
+             * Set to the passed in operator value.
+             */
+            operator: string;
+        }
+        type AssertPredicate = RegExp | (new() => object) | ((thrown: unknown) => boolean) | object | Error;
+        /**
+         * Throws an `AssertionError` with the provided error message or a default
+         * error message. If the `message` parameter is an instance of an `Error` then
+         * it will be thrown instead of the `AssertionError`.
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.fail();
+         * // AssertionError [ERR_ASSERTION]: Failed
+         *
+         * assert.fail('boom');
+         * // AssertionError [ERR_ASSERTION]: boom
+         *
+         * assert.fail(new TypeError('need array'));
+         * // TypeError: need array
+         * ```
+         * @since v0.1.21
+         * @param [message='Failed']
+         */
+        function fail(message?: string | Error): never;
+        /**
+         * Tests if `value` is truthy. It is equivalent to `assert.equal(!!value, true, message)`.
+         *
+         * If `value` is not truthy, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is `undefined`, a default
+         * error message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown instead of the `AssertionError`.
+         * If no arguments are passed in at all `message` will be set to the string:`` 'No value argument passed to `assert.ok()`' ``.
+         *
+         * Be aware that in the `repl` the error message will be different to the one
+         * thrown in a file! See below for further details.
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.ok(true);
+         * // OK
+         * assert.ok(1);
+         * // OK
+         *
+         * assert.ok();
+         * // AssertionError: No value argument passed to `assert.ok()`
+         *
+         * assert.ok(false, 'it\'s false');
+         * // AssertionError: it's false
+         *
+         * // In the repl:
+         * assert.ok(typeof 123 === 'string');
+         * // AssertionError: false == true
+         *
+         * // In a file (e.g. test.js):
+         * assert.ok(typeof 123 === 'string');
+         * // AssertionError: The expression evaluated to a falsy value:
+         * //
+         * //   assert.ok(typeof 123 === 'string')
+         *
+         * assert.ok(false);
+         * // AssertionError: The expression evaluated to a falsy value:
+         * //
+         * //   assert.ok(false)
+         *
+         * assert.ok(0);
+         * // AssertionError: The expression evaluated to a falsy value:
+         * //
+         * //   assert.ok(0)
+         * ```
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * // Using `assert()` works the same:
+         * assert(2 + 2 > 5);;
+         * // AssertionError: The expression evaluated to a falsy value:
+         * //
+         * //   assert(2 + 2 > 5)
+         * ```
+         * @since v0.1.21
+         */
+        function ok(value: unknown, message?: string | Error): asserts value;
+        /**
+         * **Strict assertion mode**
+         *
+         * An alias of {@link strictEqual}.
+         *
+         * **Legacy assertion mode**
+         *
+         * > Stability: 3 - Legacy: Use {@link strictEqual} instead.
+         *
+         * Tests shallow, coercive equality between the `actual` and `expected` parameters
+         * using the [`==` operator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Equality). `NaN` is specially handled
+         * and treated as being identical if both sides are `NaN`.
+         *
+         * ```js
+         * import assert from 'node:assert';
+         *
+         * assert.equal(1, 1);
+         * // OK, 1 == 1
+         * assert.equal(1, '1');
+         * // OK, 1 == '1'
+         * assert.equal(NaN, NaN);
+         * // OK
+         *
+         * assert.equal(1, 2);
+         * // AssertionError: 1 == 2
+         * assert.equal({ a: { b: 1 } }, { a: { b: 1 } });
+         * // AssertionError: { a: { b: 1 } } == { a: { b: 1 } }
+         * ```
+         *
+         * If the values are not equal, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is undefined, a default
+         * error message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown instead of the `AssertionError`.
+         * @since v0.1.21
+         */
+        function equal(actual: unknown, expected: unknown, message?: string | Error): void;
+        /**
+         * **Strict assertion mode**
+         *
+         * An alias of {@link notStrictEqual}.
+         *
+         * **Legacy assertion mode**
+         *
+         * > Stability: 3 - Legacy: Use {@link notStrictEqual} instead.
+         *
+         * Tests shallow, coercive inequality with the [`!=` operator](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Inequality). `NaN` is
+         * specially handled and treated as being identical if both sides are `NaN`.
+         *
+         * ```js
+         * import assert from 'node:assert';
+         *
+         * assert.notEqual(1, 2);
+         * // OK
+         *
+         * assert.notEqual(1, 1);
+         * // AssertionError: 1 != 1
+         *
+         * assert.notEqual(1, '1');
+         * // AssertionError: 1 != '1'
+         * ```
+         *
+         * If the values are equal, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is undefined, a default error
+         * message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown instead of the `AssertionError`.
+         * @since v0.1.21
+         */
+        function notEqual(actual: unknown, expected: unknown, message?: string | Error): void;
+        /**
+         * **Strict assertion mode**
+         *
+         * An alias of {@link deepStrictEqual}.
+         *
+         * **Legacy assertion mode**
+         *
+         * > Stability: 3 - Legacy: Use {@link deepStrictEqual} instead.
+         *
+         * Tests for deep equality between the `actual` and `expected` parameters. Consider
+         * using {@link deepStrictEqual} instead. {@link deepEqual} can have
+         * surprising results.
+         *
+         * _Deep equality_ means that the enumerable "own" properties of child objects
+         * are also recursively evaluated by the following rules.
+         * @since v0.1.21
+         */
+        function deepEqual(actual: unknown, expected: unknown, message?: string | Error): void;
+        /**
+         * **Strict assertion mode**
+         *
+         * An alias of {@link notDeepStrictEqual}.
+         *
+         * **Legacy assertion mode**
+         *
+         * > Stability: 3 - Legacy: Use {@link notDeepStrictEqual} instead.
+         *
+         * Tests for any deep inequality. Opposite of {@link deepEqual}.
+         *
+         * ```js
+         * import assert from 'node:assert';
+         *
+         * const obj1 = {
+         *   a: {
+         *     b: 1,
+         *   },
+         * };
+         * const obj2 = {
+         *   a: {
+         *     b: 2,
+         *   },
+         * };
+         * const obj3 = {
+         *   a: {
+         *     b: 1,
+         *   },
+         * };
+         * const obj4 = { __proto__: obj1 };
+         *
+         * assert.notDeepEqual(obj1, obj1);
+         * // AssertionError: { a: { b: 1 } } notDeepEqual { a: { b: 1 } }
+         *
+         * assert.notDeepEqual(obj1, obj2);
+         * // OK
+         *
+         * assert.notDeepEqual(obj1, obj3);
+         * // AssertionError: { a: { b: 1 } } notDeepEqual { a: { b: 1 } }
+         *
+         * assert.notDeepEqual(obj1, obj4);
+         * // OK
+         * ```
+         *
+         * If the values are deeply equal, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is undefined, a default
+         * error message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown
+         * instead of the `AssertionError`.
+         * @since v0.1.21
+         */
+        function notDeepEqual(actual: unknown, expected: unknown, message?: string | Error): void;
+        /**
+         * Tests strict equality between the `actual` and `expected` parameters as
+         * determined by [`Object.is()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is).
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.strictEqual(1, 2);
+         * // AssertionError [ERR_ASSERTION]: Expected inputs to be strictly equal:
+         * //
+         * // 1 !== 2
+         *
+         * assert.strictEqual(1, 1);
+         * // OK
+         *
+         * assert.strictEqual('Hello foobar', 'Hello World!');
+         * // AssertionError [ERR_ASSERTION]: Expected inputs to be strictly equal:
+         * // + actual - expected
+         * //
+         * // + 'Hello foobar'
+         * // - 'Hello World!'
+         * //          ^
+         *
+         * const apples = 1;
+         * const oranges = 2;
+         * assert.strictEqual(apples, oranges, `apples ${apples} !== oranges ${oranges}`);
+         * // AssertionError [ERR_ASSERTION]: apples 1 !== oranges 2
+         *
+         * assert.strictEqual(1, '1', new TypeError('Inputs are not identical'));
+         * // TypeError: Inputs are not identical
+         * ```
+         *
+         * If the values are not strictly equal, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is undefined, a
+         * default error message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown
+         * instead of the `AssertionError`.
+         * @since v0.1.21
+         */
+        function strictEqual<T>(actual: unknown, expected: T, message?: string | Error): asserts actual is T;
+        /**
+         * Tests strict inequality between the `actual` and `expected` parameters as
+         * determined by [`Object.is()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/is).
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.notStrictEqual(1, 2);
+         * // OK
+         *
+         * assert.notStrictEqual(1, 1);
+         * // AssertionError [ERR_ASSERTION]: Expected "actual" to be strictly unequal to:
+         * //
+         * // 1
+         *
+         * assert.notStrictEqual(1, '1');
+         * // OK
+         * ```
+         *
+         * If the values are strictly equal, an `AssertionError` is thrown with a `message` property set equal to the value of the `message` parameter. If the `message` parameter is undefined, a
+         * default error message is assigned. If the `message` parameter is an instance of an `Error` then it will be thrown
+         * instead of the `AssertionError`.
+         * @since v0.1.21
+         */
+        function notStrictEqual(actual: unknown, expected: unknown, message?: string | Error): void;
+        /**
+         * Tests for deep equality between the `actual` and `expected` parameters.
+         * "Deep" equality means that the enumerable "own" properties of child objects
+         * are recursively evaluated also by the following rules.
+         * @since v1.2.0
+         */
+        function deepStrictEqual<T>(actual: unknown, expected: T, message?: string | Error): asserts actual is T;
+        /**
+         * Tests for deep strict inequality. Opposite of {@link deepStrictEqual}.
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.notDeepStrictEqual({ a: 1 }, { a: '1' });
+         * // OK
+         * ```
+         *
+         * If the values are deeply and strictly equal, an `AssertionError` is thrown
+         * with a `message` property set equal to the value of the `message` parameter. If
+         * the `message` parameter is undefined, a default error message is assigned. If
+         * the `message` parameter is an instance of an `Error` then it will be thrown
+         * instead of the `AssertionError`.
+         * @since v1.2.0
+         */
+        function notDeepStrictEqual(actual: unknown, expected: unknown, message?: string | Error): void;
+        /**
+         * Expects the function `fn` to throw an error.
+         *
+         * If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
+         * [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), a validation function,
+         * a validation object where each property will be tested for strict deep equality,
+         * or an instance of error where each property will be tested for strict deep
+         * equality including the non-enumerable `message` and `name` properties. When
+         * using an object, it is also possible to use a regular expression, when
+         * validating against a string property. See below for examples.
+         *
+         * If specified, `message` will be appended to the message provided by the `AssertionError` if the `fn` call fails to throw or in case the error validation
+         * fails.
+         *
+         * Custom validation object/error instance:
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * const err = new TypeError('Wrong value');
+         * err.code = 404;
+         * err.foo = 'bar';
+         * err.info = {
+         *   nested: true,
+         *   baz: 'text',
+         * };
+         * err.reg = /abc/i;
+         *
+         * assert.throws(
+         *   () => {
+         *     throw err;
+         *   },
+         *   {
+         *     name: 'TypeError',
+         *     message: 'Wrong value',
+         *     info: {
+         *       nested: true,
+         *       baz: 'text',
+         *     },
+         *     // Only properties on the validation object will be tested for.
+         *     // Using nested objects requires all properties to be present. Otherwise
+         *     // the validation is going to fail.
+         *   },
+         * );
+         *
+         * // Using regular expressions to validate error properties:
+         * assert.throws(
+         *   () => {
+         *     throw err;
+         *   },
+         *   {
+         *     // The `name` and `message` properties are strings and using regular
+         *     // expressions on those will match against the string. If they fail, an
+         *     // error is thrown.
+         *     name: /^TypeError$/,
+         *     message: /Wrong/,
+         *     foo: 'bar',
+         *     info: {
+         *       nested: true,
+         *       // It is not possible to use regular expressions for nested properties!
+         *       baz: 'text',
+         *     },
+         *     // The `reg` property contains a regular expression and only if the
+         *     // validation object contains an identical regular expression, it is going
+         *     // to pass.
+         *     reg: /abc/i,
+         *   },
+         * );
+         *
+         * // Fails due to the different `message` and `name` properties:
+         * assert.throws(
+         *   () => {
+         *     const otherErr = new Error('Not found');
+         *     // Copy all enumerable properties from `err` to `otherErr`.
+         *     for (const [key, value] of Object.entries(err)) {
+         *       otherErr[key] = value;
+         *     }
+         *     throw otherErr;
+         *   },
+         *   // The error's `message` and `name` properties will also be checked when using
+         *   // an error as validation object.
+         *   err,
+         * );
+         * ```
+         *
+         * Validate instanceof using constructor:
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.throws(
+         *   () => {
+         *     throw new Error('Wrong value');
+         *   },
+         *   Error,
+         * );
+         * ```
+         *
+         * Validate error message using [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions):
+         *
+         * Using a regular expression runs `.toString` on the error object, and will
+         * therefore also include the error name.
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.throws(
+         *   () => {
+         *     throw new Error('Wrong value');
+         *   },
+         *   /^Error: Wrong value$/,
+         * );
+         * ```
+         *
+         * Custom error validation:
+         *
+         * The function must return `true` to indicate all internal validations passed.
+         * It will otherwise fail with an `AssertionError`.
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.throws(
+         *   () => {
+         *     throw new Error('Wrong value');
+         *   },
+         *   (err) => {
+         *     assert(err instanceof Error);
+         *     assert(/value/.test(err));
+         *     // Avoid returning anything from validation functions besides `true`.
+         *     // Otherwise, it's not clear what part of the validation failed. Instead,
+         *     // throw an error about the specific validation that failed (as done in this
+         *     // example) and add as much helpful debugging information to that error as
+         *     // possible.
+         *     return true;
+         *   },
+         *   'unexpected error',
+         * );
+         * ```
+         *
+         * `error` cannot be a string. If a string is provided as the second
+         * argument, then `error` is assumed to be omitted and the string will be used for `message` instead. This can lead to easy-to-miss mistakes. Using the same
+         * message as the thrown error message is going to result in an `ERR_AMBIGUOUS_ARGUMENT` error. Please read the example below carefully if using
+         * a string as the second argument gets considered:
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * function throwingFirst() {
+         *   throw new Error('First');
+         * }
+         *
+         * function throwingSecond() {
+         *   throw new Error('Second');
+         * }
+         *
+         * function notThrowing() {}
+         *
+         * // The second argument is a string and the input function threw an Error.
+         * // The first case will not throw as it does not match for the error message
+         * // thrown by the input function!
+         * assert.throws(throwingFirst, 'Second');
+         * // In the next example the message has no benefit over the message from the
+         * // error and since it is not clear if the user intended to actually match
+         * // against the error message, Node.js throws an `ERR_AMBIGUOUS_ARGUMENT` error.
+         * assert.throws(throwingSecond, 'Second');
+         * // TypeError [ERR_AMBIGUOUS_ARGUMENT]
+         *
+         * // The string is only used (as message) in case the function does not throw:
+         * assert.throws(notThrowing, 'Second');
+         * // AssertionError [ERR_ASSERTION]: Missing expected exception: Second
+         *
+         * // If it was intended to match for the error message do this instead:
+         * // It does not throw because the error messages match.
+         * assert.throws(throwingSecond, /Second$/);
+         *
+         * // If the error message does not match, an AssertionError is thrown.
+         * assert.throws(throwingFirst, /Second$/);
+         * // AssertionError [ERR_ASSERTION]
+         * ```
+         *
+         * Due to the confusing error-prone notation, avoid a string as the second
+         * argument.
+         * @since v0.1.21
+         */
+        function throws(block: () => unknown, message?: string | Error): void;
+        function throws(block: () => unknown, error: AssertPredicate, message?: string | Error): void;
+        /**
+         * Asserts that the function `fn` does not throw an error.
+         *
+         * Using `assert.doesNotThrow()` is actually not useful because there
+         * is no benefit in catching an error and then rethrowing it. Instead, consider
+         * adding a comment next to the specific code path that should not throw and keep
+         * error messages as expressive as possible.
+         *
+         * When `assert.doesNotThrow()` is called, it will immediately call the `fn` function.
+         *
+         * If an error is thrown and it is the same type as that specified by the `error` parameter, then an `AssertionError` is thrown. If the error is of a
+         * different type, or if the `error` parameter is undefined, the error is
+         * propagated back to the caller.
+         *
+         * If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
+         * [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), or a validation
+         * function. See {@link throws} for more details.
+         *
+         * The following, for instance, will throw the `TypeError` because there is no
+         * matching error type in the assertion:
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.doesNotThrow(
+         *   () => {
+         *     throw new TypeError('Wrong value');
+         *   },
+         *   SyntaxError,
+         * );
+         * ```
+         *
+         * However, the following will result in an `AssertionError` with the message
+         * 'Got unwanted exception...':
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.doesNotThrow(
+         *   () => {
+         *     throw new TypeError('Wrong value');
+         *   },
+         *   TypeError,
+         * );
+         * ```
+         *
+         * If an `AssertionError` is thrown and a value is provided for the `message` parameter, the value of `message` will be appended to the `AssertionError` message:
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.doesNotThrow(
+         *   () => {
+         *     throw new TypeError('Wrong value');
+         *   },
+         *   /Wrong value/,
+         *   'Whoops',
+         * );
+         * // Throws: AssertionError: Got unwanted exception: Whoops
+         * ```
+         * @since v0.1.21
+         */
+        function doesNotThrow(block: () => unknown, message?: string | Error): void;
+        function doesNotThrow(block: () => unknown, error: AssertPredicate, message?: string | Error): void;
+        /**
+         * Throws `value` if `value` is not `undefined` or `null`. This is useful when
+         * testing the `error` argument in callbacks. The stack trace contains all frames
+         * from the error passed to `ifError()` including the potential new frames for `ifError()` itself.
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.ifError(null);
+         * // OK
+         * assert.ifError(0);
+         * // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: 0
+         * assert.ifError('error');
+         * // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: 'error'
+         * assert.ifError(new Error());
+         * // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: Error
+         *
+         * // Create some random error frames.
+         * let err;
+         * (function errorFrame() {
+         *   err = new Error('test error');
+         * })();
+         *
+         * (function ifErrorFrame() {
+         *   assert.ifError(err);
+         * })();
+         * // AssertionError [ERR_ASSERTION]: ifError got unwanted exception: test error
+         * //     at ifErrorFrame
+         * //     at errorFrame
+         * ```
+         * @since v0.1.97
+         */
+        function ifError(value: unknown): asserts value is null | undefined;
+        /**
+         * Awaits the `asyncFn` promise or, if `asyncFn` is a function, immediately
+         * calls the function and awaits the returned promise to complete. It will then
+         * check that the promise is rejected.
+         *
+         * If `asyncFn` is a function and it throws an error synchronously, `assert.rejects()` will return a rejected `Promise` with that error. If the
+         * function does not return a promise, `assert.rejects()` will return a rejected `Promise` with an [ERR_INVALID_RETURN_VALUE](https://nodejs.org/docs/latest-v25.x/api/errors.html#err_invalid_return_value)
+         * error. In both cases the error handler is skipped.
+         *
+         * Besides the async nature to await the completion behaves identically to {@link throws}.
+         *
+         * If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
+         * [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), a validation function,
+         * an object where each property will be tested for, or an instance of error where
+         * each property will be tested for including the non-enumerable `message` and `name` properties.
+         *
+         * If specified, `message` will be the message provided by the `{@link AssertionError}` if the `asyncFn` fails to reject.
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * await assert.rejects(
+         *   async () => {
+         *     throw new TypeError('Wrong value');
+         *   },
+         *   {
+         *     name: 'TypeError',
+         *     message: 'Wrong value',
+         *   },
+         * );
+         * ```
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * await assert.rejects(
+         *   async () => {
+         *     throw new TypeError('Wrong value');
+         *   },
+         *   (err) => {
+         *     assert.strictEqual(err.name, 'TypeError');
+         *     assert.strictEqual(err.message, 'Wrong value');
+         *     return true;
+         *   },
+         * );
+         * ```
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.rejects(
+         *   Promise.reject(new Error('Wrong value')),
+         *   Error,
+         * ).then(() => {
+         *   // ...
+         * });
+         * ```
+         *
+         * `error` cannot be a string. If a string is provided as the second argument, then `error` is assumed to
+         * be omitted and the string will be used for `message` instead. This can lead to easy-to-miss mistakes. Please read the
+         * example in {@link throws} carefully if using a string as the second argument gets considered.
+         * @since v10.0.0
+         */
+        function rejects(block: (() => Promise<unknown>) | Promise<unknown>, message?: string | Error): Promise<void>;
+        function rejects(
+            block: (() => Promise<unknown>) | Promise<unknown>,
+            error: AssertPredicate,
+            message?: string | Error,
+        ): Promise<void>;
+        /**
+         * Awaits the `asyncFn` promise or, if `asyncFn` is a function, immediately
+         * calls the function and awaits the returned promise to complete. It will then
+         * check that the promise is not rejected.
+         *
+         * If `asyncFn` is a function and it throws an error synchronously, `assert.doesNotReject()` will return a rejected `Promise` with that error. If
+         * the function does not return a promise, `assert.doesNotReject()` will return a
+         * rejected `Promise` with an [ERR_INVALID_RETURN_VALUE](https://nodejs.org/docs/latest-v25.x/api/errors.html#err_invalid_return_value) error. In both cases
+         * the error handler is skipped.
+         *
+         * Using `assert.doesNotReject()` is actually not useful because there is little
+         * benefit in catching a rejection and then rejecting it again. Instead, consider
+         * adding a comment next to the specific code path that should not reject and keep
+         * error messages as expressive as possible.
+         *
+         * If specified, `error` can be a [`Class`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Classes),
+         * [`RegExp`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions), or a validation
+         * function. See {@link throws} for more details.
+         *
+         * Besides the async nature to await the completion behaves identically to {@link doesNotThrow}.
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * await assert.doesNotReject(
+         *   async () => {
+         *     throw new TypeError('Wrong value');
+         *   },
+         *   SyntaxError,
+         * );
+         * ```
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.doesNotReject(Promise.reject(new TypeError('Wrong value')))
+         *   .then(() => {
+         *     // ...
+         *   });
+         * ```
+         * @since v10.0.0
+         */
+        function doesNotReject(
+            block: (() => Promise<unknown>) | Promise<unknown>,
+            message?: string | Error,
+        ): Promise<void>;
+        function doesNotReject(
+            block: (() => Promise<unknown>) | Promise<unknown>,
+            error: AssertPredicate,
+            message?: string | Error,
+        ): Promise<void>;
+        /**
+         * Expects the `string` input to match the regular expression.
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.match('I will fail', /pass/);
+         * // AssertionError [ERR_ASSERTION]: The input did not match the regular ...
+         *
+         * assert.match(123, /pass/);
+         * // AssertionError [ERR_ASSERTION]: The "string" argument must be of type string.
+         *
+         * assert.match('I will pass', /pass/);
+         * // OK
+         * ```
+         *
+         * If the values do not match, or if the `string` argument is of another type than `string`, an `{@link AssertionError}` is thrown with a `message` property set equal
+         * to the value of the `message` parameter. If the `message` parameter is
+         * undefined, a default error message is assigned. If the `message` parameter is an
+         * instance of an [Error](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-error) then it will be thrown instead of the `{@link AssertionError}`.
+         * @since v13.6.0, v12.16.0
+         */
+        function match(value: string, regExp: RegExp, message?: string | Error): void;
+        /**
+         * Expects the `string` input not to match the regular expression.
+         *
+         * ```js
+         * import assert from 'node:assert/strict';
+         *
+         * assert.doesNotMatch('I will fail', /fail/);
+         * // AssertionError [ERR_ASSERTION]: The input was expected to not match the ...
+         *
+         * assert.doesNotMatch(123, /pass/);
+         * // AssertionError [ERR_ASSERTION]: The "string" argument must be of type string.
+         *
+         * assert.doesNotMatch('I will pass', /different/);
+         * // OK
+         * ```
+         *
+         * If the values do match, or if the `string` argument is of another type than `string`, an `{@link AssertionError}` is thrown with a `message` property set equal
+         * to the value of the `message` parameter. If the `message` parameter is
+         * undefined, a default error message is assigned. If the `message` parameter is an
+         * instance of an [Error](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-error) then it will be thrown instead of the `{@link AssertionError}`.
+         * @since v13.6.0, v12.16.0
+         */
+        function doesNotMatch(value: string, regExp: RegExp, message?: string | Error): void;
+        /**
+         * Tests for partial deep equality between the `actual` and `expected` parameters.
+         * "Deep" equality means that the enumerable "own" properties of child objects
+         * are recursively evaluated also by the following rules. "Partial" equality means
+         * that only properties that exist on the `expected` parameter are going to be
+         * compared.
+         *
+         * This method always passes the same test cases as `assert.deepStrictEqual()`,
+         * behaving as a super set of it.
+         * @since v22.13.0
+         */
+        function partialDeepStrictEqual(actual: unknown, expected: unknown, message?: string | Error): void;
+    }
+    namespace assert {
+        export { strict };
+    }
+    export = assert;
+}
+declare module "assert" {
+    import assert = require("node:assert");
+    export = assert;
+}
diff --git a/mqtt-backend/node_modules/@types/node/assert/strict.d.ts b/mqtt-backend/node_modules/@types/node/assert/strict.d.ts
new file mode 100644
index 0000000..7a9dcf5
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/assert/strict.d.ts
@@ -0,0 +1,59 @@
+declare module "node:assert/strict" {
+    import {
+        Assert,
+        AssertionError,
+        AssertionErrorOptions,
+        AssertOptions,
+        AssertPredicate,
+        AssertStrict,
+        deepStrictEqual,
+        doesNotMatch,
+        doesNotReject,
+        doesNotThrow,
+        fail,
+        ifError,
+        match,
+        notDeepStrictEqual,
+        notStrictEqual,
+        ok,
+        partialDeepStrictEqual,
+        rejects,
+        strictEqual,
+        throws,
+    } from "node:assert";
+    function strict(value: unknown, message?: string | Error): asserts value;
+    namespace strict {
+        export {
+            Assert,
+            AssertionError,
+            AssertionErrorOptions,
+            AssertOptions,
+            AssertPredicate,
+            AssertStrict,
+            deepStrictEqual,
+            deepStrictEqual as deepEqual,
+            doesNotMatch,
+            doesNotReject,
+            doesNotThrow,
+            fail,
+            ifError,
+            match,
+            notDeepStrictEqual,
+            notDeepStrictEqual as notDeepEqual,
+            notStrictEqual,
+            notStrictEqual as notEqual,
+            ok,
+            partialDeepStrictEqual,
+            rejects,
+            strict,
+            strictEqual,
+            strictEqual as equal,
+            throws,
+        };
+    }
+    export = strict;
+}
+declare module "assert/strict" {
+    import strict = require("node:assert/strict");
+    export = strict;
+}
diff --git a/mqtt-backend/node_modules/@types/node/async_hooks.d.ts b/mqtt-backend/node_modules/@types/node/async_hooks.d.ts
new file mode 100644
index 0000000..bb82b8a
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/async_hooks.d.ts
@@ -0,0 +1,603 @@
+declare module "node:async_hooks" {
+    /**
+     * ```js
+     * import { executionAsyncId } from 'node:async_hooks';
+     * import fs from 'node:fs';
+     *
+     * console.log(executionAsyncId());  // 1 - bootstrap
+     * const path = '.';
+     * fs.open(path, 'r', (err, fd) => {
+     *   console.log(executionAsyncId());  // 6 - open()
+     * });
+     * ```
+     *
+     * The ID returned from `executionAsyncId()` is related to execution timing, not
+     * causality (which is covered by `triggerAsyncId()`):
+     *
+     * ```js
+     * const server = net.createServer((conn) => {
+     *   // Returns the ID of the server, not of the new connection, because the
+     *   // callback runs in the execution scope of the server's MakeCallback().
+     *   async_hooks.executionAsyncId();
+     *
+     * }).listen(port, () => {
+     *   // Returns the ID of a TickObject (process.nextTick()) because all
+     *   // callbacks passed to .listen() are wrapped in a nextTick().
+     *   async_hooks.executionAsyncId();
+     * });
+     * ```
+     *
+     * Promise contexts may not get precise `executionAsyncIds` by default.
+     * See the section on [promise execution tracking](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html#promise-execution-tracking).
+     * @since v8.1.0
+     * @return The `asyncId` of the current execution context. Useful to track when something calls.
+     */
+    function executionAsyncId(): number;
+    /**
+     * Resource objects returned by `executionAsyncResource()` are most often internal
+     * Node.js handle objects with undocumented APIs. Using any functions or properties
+     * on the object is likely to crash your application and should be avoided.
+     *
+     * Using `executionAsyncResource()` in the top-level execution context will
+     * return an empty object as there is no handle or request object to use,
+     * but having an object representing the top-level can be helpful.
+     *
+     * ```js
+     * import { open } from 'node:fs';
+     * import { executionAsyncId, executionAsyncResource } from 'node:async_hooks';
+     *
+     * console.log(executionAsyncId(), executionAsyncResource());  // 1 {}
+     * open(new URL(import.meta.url), 'r', (err, fd) => {
+     *   console.log(executionAsyncId(), executionAsyncResource());  // 7 FSReqWrap
+     * });
+     * ```
+     *
+     * This can be used to implement continuation local storage without the
+     * use of a tracking `Map` to store the metadata:
+     *
+     * ```js
+     * import { createServer } from 'node:http';
+     * import {
+     *   executionAsyncId,
+     *   executionAsyncResource,
+     *   createHook,
+     * } from 'node:async_hooks';
+     * const sym = Symbol('state'); // Private symbol to avoid pollution
+     *
+     * createHook({
+     *   init(asyncId, type, triggerAsyncId, resource) {
+     *     const cr = executionAsyncResource();
+     *     if (cr) {
+     *       resource[sym] = cr[sym];
+     *     }
+     *   },
+     * }).enable();
+     *
+     * const server = createServer((req, res) => {
+     *   executionAsyncResource()[sym] = { state: req.url };
+     *   setTimeout(function() {
+     *     res.end(JSON.stringify(executionAsyncResource()[sym]));
+     *   }, 100);
+     * }).listen(3000);
+     * ```
+     * @since v13.9.0, v12.17.0
+     * @return The resource representing the current execution. Useful to store data within the resource.
+     */
+    function executionAsyncResource(): object;
+    /**
+     * ```js
+     * const server = net.createServer((conn) => {
+     *   // The resource that caused (or triggered) this callback to be called
+     *   // was that of the new connection. Thus the return value of triggerAsyncId()
+     *   // is the asyncId of "conn".
+     *   async_hooks.triggerAsyncId();
+     *
+     * }).listen(port, () => {
+     *   // Even though all callbacks passed to .listen() are wrapped in a nextTick()
+     *   // the callback itself exists because the call to the server's .listen()
+     *   // was made. So the return value would be the ID of the server.
+     *   async_hooks.triggerAsyncId();
+     * });
+     * ```
+     *
+     * Promise contexts may not get valid `triggerAsyncId`s by default. See
+     * the section on [promise execution tracking](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html#promise-execution-tracking).
+     * @return The ID of the resource responsible for calling the callback that is currently being executed.
+     */
+    function triggerAsyncId(): number;
+    interface HookCallbacks {
+        /**
+         * The [`init` callback](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html#initasyncid-type-triggerasyncid-resource).
+         */
+        init?(asyncId: number, type: string, triggerAsyncId: number, resource: object): void;
+        /**
+         * The [`before` callback](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html#beforeasyncid).
+         */
+        before?(asyncId: number): void;
+        /**
+         * The [`after` callback](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html#afterasyncid).
+         */
+        after?(asyncId: number): void;
+        /**
+         * The [`promiseResolve` callback](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html#promiseresolveasyncid).
+         */
+        promiseResolve?(asyncId: number): void;
+        /**
+         * The [`destroy` callback](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html#destroyasyncid).
+         */
+        destroy?(asyncId: number): void;
+        /**
+         * Whether the hook should track `Promise`s. Cannot be `false` if
+         * `promiseResolve` is set.
+         * @default true
+         */
+        trackPromises?: boolean | undefined;
+    }
+    interface AsyncHook {
+        /**
+         * Enable the callbacks for a given AsyncHook instance. If no callbacks are provided enabling is a noop.
+         */
+        enable(): this;
+        /**
+         * Disable the callbacks for a given AsyncHook instance from the global pool of AsyncHook callbacks to be executed. Once a hook has been disabled it will not be called again until enabled.
+         */
+        disable(): this;
+    }
+    /**
+     * Registers functions to be called for different lifetime events of each async
+     * operation.
+     *
+     * The callbacks `init()`/`before()`/`after()`/`destroy()` are called for the
+     * respective asynchronous event during a resource's lifetime.
+     *
+     * All callbacks are optional. For example, if only resource cleanup needs to
+     * be tracked, then only the `destroy` callback needs to be passed. The
+     * specifics of all functions that can be passed to `callbacks` is in the
+     * [Hook Callbacks](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html#hook-callbacks) section.
+     *
+     * ```js
+     * import { createHook } from 'node:async_hooks';
+     *
+     * const asyncHook = createHook({
+     *   init(asyncId, type, triggerAsyncId, resource) { },
+     *   destroy(asyncId) { },
+     * });
+     * ```
+     *
+     * The callbacks will be inherited via the prototype chain:
+     *
+     * ```js
+     * class MyAsyncCallbacks {
+     *   init(asyncId, type, triggerAsyncId, resource) { }
+     *   destroy(asyncId) {}
+     * }
+     *
+     * class MyAddedCallbacks extends MyAsyncCallbacks {
+     *   before(asyncId) { }
+     *   after(asyncId) { }
+     * }
+     *
+     * const asyncHook = async_hooks.createHook(new MyAddedCallbacks());
+     * ```
+     *
+     * Because promises are asynchronous resources whose lifecycle is tracked
+     * via the async hooks mechanism, the `init()`, `before()`, `after()`, and
+     * `destroy()` callbacks _must not_ be async functions that return promises.
+     * @since v8.1.0
+     * @param options The [Hook Callbacks](https://nodejs.org/docs/latest-v25.x/api/async_hooks.html#hook-callbacks) to register
+     * @returns Instance used for disabling and enabling hooks
+     */
+    function createHook(options: HookCallbacks): AsyncHook;
+    interface AsyncResourceOptions {
+        /**
+         * The ID of the execution context that created this async event.
+         * @default executionAsyncId()
+         */
+        triggerAsyncId?: number | undefined;
+        /**
+         * Disables automatic `emitDestroy` when the object is garbage collected.
+         * This usually does not need to be set (even if `emitDestroy` is called
+         * manually), unless the resource's `asyncId` is retrieved and the
+         * sensitive API's `emitDestroy` is called with it.
+         * @default false
+         */
+        requireManualDestroy?: boolean | undefined;
+    }
+    /**
+     * The class `AsyncResource` is designed to be extended by the embedder's async
+     * resources. Using this, users can easily trigger the lifetime events of their
+     * own resources.
+     *
+     * The `init` hook will trigger when an `AsyncResource` is instantiated.
+     *
+     * The following is an overview of the `AsyncResource` API.
+     *
+     * ```js
+     * import { AsyncResource, executionAsyncId } from 'node:async_hooks';
+     *
+     * // AsyncResource() is meant to be extended. Instantiating a
+     * // new AsyncResource() also triggers init. If triggerAsyncId is omitted then
+     * // async_hook.executionAsyncId() is used.
+     * const asyncResource = new AsyncResource(
+     *   type, { triggerAsyncId: executionAsyncId(), requireManualDestroy: false },
+     * );
+     *
+     * // Run a function in the execution context of the resource. This will
+     * // * establish the context of the resource
+     * // * trigger the AsyncHooks before callbacks
+     * // * call the provided function `fn` with the supplied arguments
+     * // * trigger the AsyncHooks after callbacks
+     * // * restore the original execution context
+     * asyncResource.runInAsyncScope(fn, thisArg, ...args);
+     *
+     * // Call AsyncHooks destroy callbacks.
+     * asyncResource.emitDestroy();
+     *
+     * // Return the unique ID assigned to the AsyncResource instance.
+     * asyncResource.asyncId();
+     *
+     * // Return the trigger ID for the AsyncResource instance.
+     * asyncResource.triggerAsyncId();
+     * ```
+     */
+    class AsyncResource {
+        /**
+         * AsyncResource() is meant to be extended. Instantiating a
+         * new AsyncResource() also triggers init. If triggerAsyncId is omitted then
+         * async_hook.executionAsyncId() is used.
+         * @param type The type of async event.
+         * @param triggerAsyncId The ID of the execution context that created
+         *   this async event (default: `executionAsyncId()`), or an
+         *   AsyncResourceOptions object (since v9.3.0)
+         */
+        constructor(type: string, triggerAsyncId?: number | AsyncResourceOptions);
+        /**
+         * Binds the given function to the current execution context.
+         * @since v14.8.0, v12.19.0
+         * @param fn The function to bind to the current execution context.
+         * @param type An optional name to associate with the underlying `AsyncResource`.
+         */
+        static bind<Func extends (this: ThisArg, ...args: any[]) => any, ThisArg>(
+            fn: Func,
+            type?: string,
+            thisArg?: ThisArg,
+        ): Func;
+        /**
+         * Binds the given function to execute to this `AsyncResource`'s scope.
+         * @since v14.8.0, v12.19.0
+         * @param fn The function to bind to the current `AsyncResource`.
+         */
+        bind<Func extends (...args: any[]) => any>(fn: Func): Func;
+        /**
+         * Call the provided function with the provided arguments in the execution context
+         * of the async resource. This will establish the context, trigger the AsyncHooks
+         * before callbacks, call the function, trigger the AsyncHooks after callbacks, and
+         * then restore the original execution context.
+         * @since v9.6.0
+         * @param fn The function to call in the execution context of this async resource.
+         * @param thisArg The receiver to be used for the function call.
+         * @param args Optional arguments to pass to the function.
+         */
+        runInAsyncScope<This, Result>(
+            fn: (this: This, ...args: any[]) => Result,
+            thisArg?: This,
+            ...args: any[]
+        ): Result;
+        /**
+         * Call all `destroy` hooks. This should only ever be called once. An error will
+         * be thrown if it is called more than once. This **must** be manually called. If
+         * the resource is left to be collected by the GC then the `destroy` hooks will
+         * never be called.
+         * @return A reference to `asyncResource`.
+         */
+        emitDestroy(): this;
+        /**
+         * @return The unique `asyncId` assigned to the resource.
+         */
+        asyncId(): number;
+        /**
+         * @return The same `triggerAsyncId` that is passed to the `AsyncResource` constructor.
+         */
+        triggerAsyncId(): number;
+    }
+    interface AsyncLocalStorageOptions {
+        /**
+         * The default value to be used when no store is provided.
+         */
+        defaultValue?: any;
+        /**
+         * A name for the `AsyncLocalStorage` value.
+         */
+        name?: string | undefined;
+    }
+    /**
+     * This class creates stores that stay coherent through asynchronous operations.
+     *
+     * While you can create your own implementation on top of the `node:async_hooks` module, `AsyncLocalStorage` should be preferred as it is a performant and memory
+     * safe implementation that involves significant optimizations that are non-obvious
+     * to implement.
+     *
+     * The following example uses `AsyncLocalStorage` to build a simple logger
+     * that assigns IDs to incoming HTTP requests and includes them in messages
+     * logged within each request.
+     *
+     * ```js
+     * import http from 'node:http';
+     * import { AsyncLocalStorage } from 'node:async_hooks';
+     *
+     * const asyncLocalStorage = new AsyncLocalStorage();
+     *
+     * function logWithId(msg) {
+     *   const id = asyncLocalStorage.getStore();
+     *   console.log(`${id !== undefined ? id : '-'}:`, msg);
+     * }
+     *
+     * let idSeq = 0;
+     * http.createServer((req, res) => {
+     *   asyncLocalStorage.run(idSeq++, () => {
+     *     logWithId('start');
+     *     // Imagine any chain of async operations here
+     *     setImmediate(() => {
+     *       logWithId('finish');
+     *       res.end();
+     *     });
+     *   });
+     * }).listen(8080);
+     *
+     * http.get('http://localhost:8080');
+     * http.get('http://localhost:8080');
+     * // Prints:
+     * //   0: start
+     * //   0: finish
+     * //   1: start
+     * //   1: finish
+     * ```
+     *
+     * Each instance of `AsyncLocalStorage` maintains an independent storage context.
+     * Multiple instances can safely exist simultaneously without risk of interfering
+     * with each other's data.
+     * @since v13.10.0, v12.17.0
+     */
+    class AsyncLocalStorage<T> {
+        /**
+         * Creates a new instance of `AsyncLocalStorage`. Store is only provided within a
+         * `run()` call or after an `enterWith()` call.
+         */
+        constructor(options?: AsyncLocalStorageOptions);
+        /**
+         * Binds the given function to the current execution context.
+         * @since v19.8.0
+         * @param fn The function to bind to the current execution context.
+         * @return A new function that calls `fn` within the captured execution context.
+         */
+        static bind<Func extends (...args: any[]) => any>(fn: Func): Func;
+        /**
+         * Captures the current execution context and returns a function that accepts a
+         * function as an argument. Whenever the returned function is called, it
+         * calls the function passed to it within the captured context.
+         *
+         * ```js
+         * const asyncLocalStorage = new AsyncLocalStorage();
+         * const runInAsyncScope = asyncLocalStorage.run(123, () => AsyncLocalStorage.snapshot());
+         * const result = asyncLocalStorage.run(321, () => runInAsyncScope(() => asyncLocalStorage.getStore()));
+         * console.log(result);  // returns 123
+         * ```
+         *
+         * AsyncLocalStorage.snapshot() can replace the use of AsyncResource for simple
+         * async context tracking purposes, for example:
+         *
+         * ```js
+         * class Foo {
+         *   #runInAsyncScope = AsyncLocalStorage.snapshot();
+         *
+         *   get() { return this.#runInAsyncScope(() => asyncLocalStorage.getStore()); }
+         * }
+         *
+         * const foo = asyncLocalStorage.run(123, () => new Foo());
+         * console.log(asyncLocalStorage.run(321, () => foo.get())); // returns 123
+         * ```
+         * @since v19.8.0
+         * @return A new function with the signature `(fn: (...args) : R, ...args) : R`.
+         */
+        static snapshot(): <R, TArgs extends any[]>(fn: (...args: TArgs) => R, ...args: TArgs) => R;
+        /**
+         * Disables the instance of `AsyncLocalStorage`. All subsequent calls
+         * to `asyncLocalStorage.getStore()` will return `undefined` until `asyncLocalStorage.run()` or `asyncLocalStorage.enterWith()` is called again.
+         *
+         * When calling `asyncLocalStorage.disable()`, all current contexts linked to the
+         * instance will be exited.
+         *
+         * Calling `asyncLocalStorage.disable()` is required before the `asyncLocalStorage` can be garbage collected. This does not apply to stores
+         * provided by the `asyncLocalStorage`, as those objects are garbage collected
+         * along with the corresponding async resources.
+         *
+         * Use this method when the `asyncLocalStorage` is not in use anymore
+         * in the current process.
+         * @since v13.10.0, v12.17.0
+         * @experimental
+         */
+        disable(): void;
+        /**
+         * Returns the current store.
+         * If called outside of an asynchronous context initialized by
+         * calling `asyncLocalStorage.run()` or `asyncLocalStorage.enterWith()`, it
+         * returns `undefined`.
+         * @since v13.10.0, v12.17.0
+         */
+        getStore(): T | undefined;
+        /**
+         * The name of the `AsyncLocalStorage` instance if provided.
+         * @since v24.0.0
+         */
+        readonly name: string;
+        /**
+         * Runs a function synchronously within a context and returns its
+         * return value. The store is not accessible outside of the callback function.
+         * The store is accessible to any asynchronous operations created within the
+         * callback.
+         *
+         * The optional `args` are passed to the callback function.
+         *
+         * If the callback function throws an error, the error is thrown by `run()` too.
+         * The stacktrace is not impacted by this call and the context is exited.
+         *
+         * Example:
+         *
+         * ```js
+         * const store = { id: 2 };
+         * try {
+         *   asyncLocalStorage.run(store, () => {
+         *     asyncLocalStorage.getStore(); // Returns the store object
+         *     setTimeout(() => {
+         *       asyncLocalStorage.getStore(); // Returns the store object
+         *     }, 200);
+         *     throw new Error();
+         *   });
+         * } catch (e) {
+         *   asyncLocalStorage.getStore(); // Returns undefined
+         *   // The error will be caught here
+         * }
+         * ```
+         * @since v13.10.0, v12.17.0
+         */
+        run<R>(store: T, callback: () => R): R;
+        run<R, TArgs extends any[]>(store: T, callback: (...args: TArgs) => R, ...args: TArgs): R;
+        /**
+         * Runs a function synchronously outside of a context and returns its
+         * return value. The store is not accessible within the callback function or
+         * the asynchronous operations created within the callback. Any `getStore()` call done within the callback function will always return `undefined`.
+         *
+         * The optional `args` are passed to the callback function.
+         *
+         * If the callback function throws an error, the error is thrown by `exit()` too.
+         * The stacktrace is not impacted by this call and the context is re-entered.
+         *
+         * Example:
+         *
+         * ```js
+         * // Within a call to run
+         * try {
+         *   asyncLocalStorage.getStore(); // Returns the store object or value
+         *   asyncLocalStorage.exit(() => {
+         *     asyncLocalStorage.getStore(); // Returns undefined
+         *     throw new Error();
+         *   });
+         * } catch (e) {
+         *   asyncLocalStorage.getStore(); // Returns the same object or value
+         *   // The error will be caught here
+         * }
+         * ```
+         * @since v13.10.0, v12.17.0
+         * @experimental
+         */
+        exit<R, TArgs extends any[]>(callback: (...args: TArgs) => R, ...args: TArgs): R;
+        /**
+         * Transitions into the context for the remainder of the current
+         * synchronous execution and then persists the store through any following
+         * asynchronous calls.
+         *
+         * Example:
+         *
+         * ```js
+         * const store = { id: 1 };
+         * // Replaces previous store with the given store object
+         * asyncLocalStorage.enterWith(store);
+         * asyncLocalStorage.getStore(); // Returns the store object
+         * someAsyncOperation(() => {
+         *   asyncLocalStorage.getStore(); // Returns the same object
+         * });
+         * ```
+         *
+         * This transition will continue for the _entire_ synchronous execution.
+         * This means that if, for example, the context is entered within an event
+         * handler subsequent event handlers will also run within that context unless
+         * specifically bound to another context with an `AsyncResource`. That is why `run()` should be preferred over `enterWith()` unless there are strong reasons
+         * to use the latter method.
+         *
+         * ```js
+         * const store = { id: 1 };
+         *
+         * emitter.on('my-event', () => {
+         *   asyncLocalStorage.enterWith(store);
+         * });
+         * emitter.on('my-event', () => {
+         *   asyncLocalStorage.getStore(); // Returns the same object
+         * });
+         *
+         * asyncLocalStorage.getStore(); // Returns undefined
+         * emitter.emit('my-event');
+         * asyncLocalStorage.getStore(); // Returns the same object
+         * ```
+         * @since v13.11.0, v12.17.0
+         * @experimental
+         */
+        enterWith(store: T): void;
+    }
+    /**
+     * @since v17.2.0, v16.14.0
+     * @return A map of provider types to the corresponding numeric id.
+     * This map contains all the event types that might be emitted by the `async_hooks.init()` event.
+     */
+    namespace asyncWrapProviders {
+        const NONE: number;
+        const DIRHANDLE: number;
+        const DNSCHANNEL: number;
+        const ELDHISTOGRAM: number;
+        const FILEHANDLE: number;
+        const FILEHANDLECLOSEREQ: number;
+        const FIXEDSIZEBLOBCOPY: number;
+        const FSEVENTWRAP: number;
+        const FSREQCALLBACK: number;
+        const FSREQPROMISE: number;
+        const GETADDRINFOREQWRAP: number;
+        const GETNAMEINFOREQWRAP: number;
+        const HEAPSNAPSHOT: number;
+        const HTTP2SESSION: number;
+        const HTTP2STREAM: number;
+        const HTTP2PING: number;
+        const HTTP2SETTINGS: number;
+        const HTTPINCOMINGMESSAGE: number;
+        const HTTPCLIENTREQUEST: number;
+        const JSSTREAM: number;
+        const JSUDPWRAP: number;
+        const MESSAGEPORT: number;
+        const PIPECONNECTWRAP: number;
+        const PIPESERVERWRAP: number;
+        const PIPEWRAP: number;
+        const PROCESSWRAP: number;
+        const PROMISE: number;
+        const QUERYWRAP: number;
+        const SHUTDOWNWRAP: number;
+        const SIGNALWRAP: number;
+        const STATWATCHER: number;
+        const STREAMPIPE: number;
+        const TCPCONNECTWRAP: number;
+        const TCPSERVERWRAP: number;
+        const TCPWRAP: number;
+        const TTYWRAP: number;
+        const UDPSENDWRAP: number;
+        const UDPWRAP: number;
+        const SIGINTWATCHDOG: number;
+        const WORKER: number;
+        const WORKERHEAPSNAPSHOT: number;
+        const WRITEWRAP: number;
+        const ZLIB: number;
+        const CHECKPRIMEREQUEST: number;
+        const PBKDF2REQUEST: number;
+        const KEYPAIRGENREQUEST: number;
+        const KEYGENREQUEST: number;
+        const KEYEXPORTREQUEST: number;
+        const CIPHERREQUEST: number;
+        const DERIVEBITSREQUEST: number;
+        const HASHREQUEST: number;
+        const RANDOMBYTESREQUEST: number;
+        const RANDOMPRIMEREQUEST: number;
+        const SCRYPTREQUEST: number;
+        const SIGNREQUEST: number;
+        const TLSWRAP: number;
+        const VERIFYREQUEST: number;
+    }
+}
+declare module "async_hooks" {
+    export * from "node:async_hooks";
+}
diff --git a/mqtt-backend/node_modules/@types/node/buffer.buffer.d.ts b/mqtt-backend/node_modules/@types/node/buffer.buffer.d.ts
new file mode 100644
index 0000000..a6c4b25
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/buffer.buffer.d.ts
@@ -0,0 +1,466 @@
+declare module "node:buffer" {
+    type ImplicitArrayBuffer<T extends WithImplicitCoercion<ArrayBufferLike>> = T extends
+        { valueOf(): infer V extends ArrayBufferLike } ? V : T;
+    global {
+        interface BufferConstructor {
+            // see buffer.d.ts for implementation shared with all TypeScript versions
+
+            /**
+             * Allocates a new buffer containing the given {str}.
+             *
+             * @param str String to store in buffer.
+             * @param encoding encoding to use, optional.  Default is 'utf8'
+             * @deprecated since v10.0.0 - Use `Buffer.from(string[, encoding])` instead.
+             */
+            new(str: string, encoding?: BufferEncoding): Buffer<ArrayBuffer>;
+            /**
+             * Allocates a new buffer of {size} octets.
+             *
+             * @param size count of octets to allocate.
+             * @deprecated since v10.0.0 - Use `Buffer.alloc()` instead (also see `Buffer.allocUnsafe()`).
+             */
+            new(size: number): Buffer<ArrayBuffer>;
+            /**
+             * Allocates a new buffer containing the given {array} of octets.
+             *
+             * @param array The octets to store.
+             * @deprecated since v10.0.0 - Use `Buffer.from(array)` instead.
+             */
+            new(array: ArrayLike<number>): Buffer<ArrayBuffer>;
+            /**
+             * Produces a Buffer backed by the same allocated memory as
+             * the given {ArrayBuffer}/{SharedArrayBuffer}.
+             *
+             * @param arrayBuffer The ArrayBuffer with which to share memory.
+             * @deprecated since v10.0.0 - Use `Buffer.from(arrayBuffer[, byteOffset[, length]])` instead.
+             */
+            new<TArrayBuffer extends ArrayBufferLike = ArrayBuffer>(arrayBuffer: TArrayBuffer): Buffer<TArrayBuffer>;
+            /**
+             * Allocates a new `Buffer` using an `array` of bytes in the range `0` – `255`.
+             * Array entries outside that range will be truncated to fit into it.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Creates a new Buffer containing the UTF-8 bytes of the string 'buffer'.
+             * const buf = Buffer.from([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]);
+             * ```
+             *
+             * If `array` is an `Array`-like object (that is, one with a `length` property of
+             * type `number`), it is treated as if it is an array, unless it is a `Buffer` or
+             * a `Uint8Array`. This means all other `TypedArray` variants get treated as an
+             * `Array`. To create a `Buffer` from the bytes backing a `TypedArray`, use
+             * `Buffer.copyBytesFrom()`.
+             *
+             * A `TypeError` will be thrown if `array` is not an `Array` or another type
+             * appropriate for `Buffer.from()` variants.
+             *
+             * `Buffer.from(array)` and `Buffer.from(string)` may also use the internal
+             * `Buffer` pool like `Buffer.allocUnsafe()` does.
+             * @since v5.10.0
+             */
+            from(array: WithImplicitCoercion<ArrayLike<number>>): Buffer<ArrayBuffer>;
+            /**
+             * This creates a view of the `ArrayBuffer` without copying the underlying
+             * memory. For example, when passed a reference to the `.buffer` property of a
+             * `TypedArray` instance, the newly created `Buffer` will share the same
+             * allocated memory as the `TypedArray`'s underlying `ArrayBuffer`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const arr = new Uint16Array(2);
+             *
+             * arr[0] = 5000;
+             * arr[1] = 4000;
+             *
+             * // Shares memory with `arr`.
+             * const buf = Buffer.from(arr.buffer);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 88 13 a0 0f>
+             *
+             * // Changing the original Uint16Array changes the Buffer also.
+             * arr[1] = 6000;
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 88 13 70 17>
+             * ```
+             *
+             * The optional `byteOffset` and `length` arguments specify a memory range within
+             * the `arrayBuffer` that will be shared by the `Buffer`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const ab = new ArrayBuffer(10);
+             * const buf = Buffer.from(ab, 0, 2);
+             *
+             * console.log(buf.length);
+             * // Prints: 2
+             * ```
+             *
+             * A `TypeError` will be thrown if `arrayBuffer` is not an `ArrayBuffer` or a
+             * `SharedArrayBuffer` or another type appropriate for `Buffer.from()`
+             * variants.
+             *
+             * It is important to remember that a backing `ArrayBuffer` can cover a range
+             * of memory that extends beyond the bounds of a `TypedArray` view. A new
+             * `Buffer` created using the `buffer` property of a `TypedArray` may extend
+             * beyond the range of the `TypedArray`:
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const arrA = Uint8Array.from([0x63, 0x64, 0x65, 0x66]); // 4 elements
+             * const arrB = new Uint8Array(arrA.buffer, 1, 2); // 2 elements
+             * console.log(arrA.buffer === arrB.buffer); // true
+             *
+             * const buf = Buffer.from(arrB.buffer);
+             * console.log(buf);
+             * // Prints: <Buffer 63 64 65 66>
+             * ```
+             * @since v5.10.0
+             * @param arrayBuffer An `ArrayBuffer`, `SharedArrayBuffer`, for example the
+             * `.buffer` property of a `TypedArray`.
+             * @param byteOffset Index of first byte to expose. **Default:** `0`.
+             * @param length Number of bytes to expose. **Default:**
+             * `arrayBuffer.byteLength - byteOffset`.
+             */
+            from<TArrayBuffer extends WithImplicitCoercion<ArrayBufferLike>>(
+                arrayBuffer: TArrayBuffer,
+                byteOffset?: number,
+                length?: number,
+            ): Buffer<ImplicitArrayBuffer<TArrayBuffer>>;
+            /**
+             * Creates a new `Buffer` containing `string`. The `encoding` parameter identifies
+             * the character encoding to be used when converting `string` into bytes.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf1 = Buffer.from('this is a tést');
+             * const buf2 = Buffer.from('7468697320697320612074c3a97374', 'hex');
+             *
+             * console.log(buf1.toString());
+             * // Prints: this is a tést
+             * console.log(buf2.toString());
+             * // Prints: this is a tést
+             * console.log(buf1.toString('latin1'));
+             * // Prints: this is a tést
+             * ```
+             *
+             * A `TypeError` will be thrown if `string` is not a string or another type
+             * appropriate for `Buffer.from()` variants.
+             *
+             * `Buffer.from(string)` may also use the internal `Buffer` pool like
+             * `Buffer.allocUnsafe()` does.
+             * @since v5.10.0
+             * @param string A string to encode.
+             * @param encoding The encoding of `string`. **Default:** `'utf8'`.
+             */
+            from(string: WithImplicitCoercion<string>, encoding?: BufferEncoding): Buffer<ArrayBuffer>;
+            from(arrayOrString: WithImplicitCoercion<ArrayLike<number> | string>): Buffer<ArrayBuffer>;
+            /**
+             * Creates a new Buffer using the passed {data}
+             * @param values to create a new Buffer
+             */
+            of(...items: number[]): Buffer<ArrayBuffer>;
+            /**
+             * Returns a new `Buffer` which is the result of concatenating all the `Buffer` instances in the `list` together.
+             *
+             * If the list has no items, or if the `totalLength` is 0, then a new zero-length `Buffer` is returned.
+             *
+             * If `totalLength` is not provided, it is calculated from the `Buffer` instances
+             * in `list` by adding their lengths.
+             *
+             * If `totalLength` is provided, it must be an unsigned integer. If the
+             * combined length of the `Buffer`s in `list` exceeds `totalLength`, the result is
+             * truncated to `totalLength`. If the combined length of the `Buffer`s in `list` is
+             * less than `totalLength`, the remaining space is filled with zeros.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Create a single `Buffer` from a list of three `Buffer` instances.
+             *
+             * const buf1 = Buffer.alloc(10);
+             * const buf2 = Buffer.alloc(14);
+             * const buf3 = Buffer.alloc(18);
+             * const totalLength = buf1.length + buf2.length + buf3.length;
+             *
+             * console.log(totalLength);
+             * // Prints: 42
+             *
+             * const bufA = Buffer.concat([buf1, buf2, buf3], totalLength);
+             *
+             * console.log(bufA);
+             * // Prints: <Buffer 00 00 00 00 ...>
+             * console.log(bufA.length);
+             * // Prints: 42
+             * ```
+             *
+             * `Buffer.concat()` may also use the internal `Buffer` pool like `Buffer.allocUnsafe()` does.
+             * @since v0.7.11
+             * @param list List of `Buffer` or {@link Uint8Array} instances to concatenate.
+             * @param totalLength Total length of the `Buffer` instances in `list` when concatenated.
+             */
+            concat(list: readonly Uint8Array[], totalLength?: number): Buffer<ArrayBuffer>;
+            /**
+             * Copies the underlying memory of `view` into a new `Buffer`.
+             *
+             * ```js
+             * const u16 = new Uint16Array([0, 0xffff]);
+             * const buf = Buffer.copyBytesFrom(u16, 1, 1);
+             * u16[1] = 0;
+             * console.log(buf.length); // 2
+             * console.log(buf[0]); // 255
+             * console.log(buf[1]); // 255
+             * ```
+             * @since v19.8.0
+             * @param view The {TypedArray} to copy.
+             * @param [offset=0] The starting offset within `view`.
+             * @param [length=view.length - offset] The number of elements from `view` to copy.
+             */
+            copyBytesFrom(view: NodeJS.TypedArray, offset?: number, length?: number): Buffer<ArrayBuffer>;
+            /**
+             * Allocates a new `Buffer` of `size` bytes. If `fill` is `undefined`, the`Buffer` will be zero-filled.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.alloc(5);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 00 00 00 00 00>
+             * ```
+             *
+             * If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown.
+             *
+             * If `fill` is specified, the allocated `Buffer` will be initialized by calling `buf.fill(fill)`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.alloc(5, 'a');
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 61 61 61 61 61>
+             * ```
+             *
+             * If both `fill` and `encoding` are specified, the allocated `Buffer` will be
+             * initialized by calling `buf.fill(fill, encoding)`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.alloc(11, 'aGVsbG8gd29ybGQ=', 'base64');
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 68 65 6c 6c 6f 20 77 6f 72 6c 64>
+             * ```
+             *
+             * Calling `Buffer.alloc()` can be measurably slower than the alternative `Buffer.allocUnsafe()` but ensures that the newly created `Buffer` instance
+             * contents will never contain sensitive data from previous allocations, including
+             * data that might not have been allocated for `Buffer`s.
+             *
+             * A `TypeError` will be thrown if `size` is not a number.
+             * @since v5.10.0
+             * @param size The desired length of the new `Buffer`.
+             * @param [fill=0] A value to pre-fill the new `Buffer` with.
+             * @param [encoding='utf8'] If `fill` is a string, this is its encoding.
+             */
+            alloc(size: number, fill?: string | Uint8Array | number, encoding?: BufferEncoding): Buffer<ArrayBuffer>;
+            /**
+             * Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown.
+             *
+             * The underlying memory for `Buffer` instances created in this way is _not_
+             * _initialized_. The contents of the newly created `Buffer` are unknown and _may contain sensitive data_. Use `Buffer.alloc()` instead to initialize`Buffer` instances with zeroes.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(10);
+             *
+             * console.log(buf);
+             * // Prints (contents may vary): <Buffer a0 8b 28 3f 01 00 00 00 50 32>
+             *
+             * buf.fill(0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 00 00 00 00 00 00 00 00 00 00>
+             * ```
+             *
+             * A `TypeError` will be thrown if `size` is not a number.
+             *
+             * The `Buffer` module pre-allocates an internal `Buffer` instance of
+             * size `Buffer.poolSize` that is used as a pool for the fast allocation of new `Buffer` instances created using `Buffer.allocUnsafe()`, `Buffer.from(array)`,
+             * and `Buffer.concat()` only when `size` is less than `Buffer.poolSize >>> 1` (floor of `Buffer.poolSize` divided by two).
+             *
+             * Use of this pre-allocated internal memory pool is a key difference between
+             * calling `Buffer.alloc(size, fill)` vs. `Buffer.allocUnsafe(size).fill(fill)`.
+             * Specifically, `Buffer.alloc(size, fill)` will _never_ use the internal `Buffer`pool, while `Buffer.allocUnsafe(size).fill(fill)`_will_ use the internal`Buffer` pool if `size` is less
+             * than or equal to half `Buffer.poolSize`. The
+             * difference is subtle but can be important when an application requires the
+             * additional performance that `Buffer.allocUnsafe()` provides.
+             * @since v5.10.0
+             * @param size The desired length of the new `Buffer`.
+             */
+            allocUnsafe(size: number): Buffer<ArrayBuffer>;
+            /**
+             * Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown. A zero-length `Buffer` is created if
+             * `size` is 0.
+             *
+             * The underlying memory for `Buffer` instances created in this way is _not_
+             * _initialized_. The contents of the newly created `Buffer` are unknown and _may contain sensitive data_. Use `buf.fill(0)` to initialize
+             * such `Buffer` instances with zeroes.
+             *
+             * When using `Buffer.allocUnsafe()` to allocate new `Buffer` instances,
+             * allocations under 4 KiB are sliced from a single pre-allocated `Buffer`. This
+             * allows applications to avoid the garbage collection overhead of creating many
+             * individually allocated `Buffer` instances. This approach improves both
+             * performance and memory usage by eliminating the need to track and clean up as
+             * many individual `ArrayBuffer` objects.
+             *
+             * However, in the case where a developer may need to retain a small chunk of
+             * memory from a pool for an indeterminate amount of time, it may be appropriate
+             * to create an un-pooled `Buffer` instance using `Buffer.allocUnsafeSlow()` and
+             * then copying out the relevant bits.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Need to keep around a few small chunks of memory.
+             * const store = [];
+             *
+             * socket.on('readable', () => {
+             *   let data;
+             *   while (null !== (data = readable.read())) {
+             *     // Allocate for retained data.
+             *     const sb = Buffer.allocUnsafeSlow(10);
+             *
+             *     // Copy the data into the new allocation.
+             *     data.copy(sb, 0, 0, 10);
+             *
+             *     store.push(sb);
+             *   }
+             * });
+             * ```
+             *
+             * A `TypeError` will be thrown if `size` is not a number.
+             * @since v5.12.0
+             * @param size The desired length of the new `Buffer`.
+             */
+            allocUnsafeSlow(size: number): Buffer<ArrayBuffer>;
+        }
+        interface Buffer<TArrayBuffer extends ArrayBufferLike = ArrayBufferLike> extends Uint8Array<TArrayBuffer> {
+            // see buffer.d.ts for implementation shared with all TypeScript versions
+
+            /**
+             * Returns a new `Buffer` that references the same memory as the original, but
+             * offset and cropped by the `start` and `end` indices.
+             *
+             * This method is not compatible with the `Uint8Array.prototype.slice()`,
+             * which is a superclass of `Buffer`. To copy the slice, use`Uint8Array.prototype.slice()`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from('buffer');
+             *
+             * const copiedBuf = Uint8Array.prototype.slice.call(buf);
+             * copiedBuf[0]++;
+             * console.log(copiedBuf.toString());
+             * // Prints: cuffer
+             *
+             * console.log(buf.toString());
+             * // Prints: buffer
+             *
+             * // With buf.slice(), the original buffer is modified.
+             * const notReallyCopiedBuf = buf.slice();
+             * notReallyCopiedBuf[0]++;
+             * console.log(notReallyCopiedBuf.toString());
+             * // Prints: cuffer
+             * console.log(buf.toString());
+             * // Also prints: cuffer (!)
+             * ```
+             * @since v0.3.0
+             * @deprecated Use `subarray` instead.
+             * @param [start=0] Where the new `Buffer` will start.
+             * @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
+             */
+            slice(start?: number, end?: number): Buffer<ArrayBuffer>;
+            /**
+             * Returns a new `Buffer` that references the same memory as the original, but
+             * offset and cropped by the `start` and `end` indices.
+             *
+             * Specifying `end` greater than `buf.length` will return the same result as
+             * that of `end` equal to `buf.length`.
+             *
+             * This method is inherited from [`TypedArray.prototype.subarray()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/subarray).
+             *
+             * Modifying the new `Buffer` slice will modify the memory in the original `Buffer`because the allocated memory of the two objects overlap.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Create a `Buffer` with the ASCII alphabet, take a slice, and modify one byte
+             * // from the original `Buffer`.
+             *
+             * const buf1 = Buffer.allocUnsafe(26);
+             *
+             * for (let i = 0; i < 26; i++) {
+             *   // 97 is the decimal ASCII value for 'a'.
+             *   buf1[i] = i + 97;
+             * }
+             *
+             * const buf2 = buf1.subarray(0, 3);
+             *
+             * console.log(buf2.toString('ascii', 0, buf2.length));
+             * // Prints: abc
+             *
+             * buf1[0] = 33;
+             *
+             * console.log(buf2.toString('ascii', 0, buf2.length));
+             * // Prints: !bc
+             * ```
+             *
+             * Specifying negative indexes causes the slice to be generated relative to the
+             * end of `buf` rather than the beginning.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from('buffer');
+             *
+             * console.log(buf.subarray(-6, -1).toString());
+             * // Prints: buffe
+             * // (Equivalent to buf.subarray(0, 5).)
+             *
+             * console.log(buf.subarray(-6, -2).toString());
+             * // Prints: buff
+             * // (Equivalent to buf.subarray(0, 4).)
+             *
+             * console.log(buf.subarray(-5, -2).toString());
+             * // Prints: uff
+             * // (Equivalent to buf.subarray(1, 4).)
+             * ```
+             * @since v3.0.0
+             * @param [start=0] Where the new `Buffer` will start.
+             * @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
+             */
+            subarray(start?: number, end?: number): Buffer<TArrayBuffer>;
+        }
+        // TODO: remove globals in future version
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedBuffer = Buffer<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type AllowSharedBuffer = Buffer<ArrayBufferLike>;
+    }
+}
diff --git a/mqtt-backend/node_modules/@types/node/buffer.d.ts b/mqtt-backend/node_modules/@types/node/buffer.d.ts
new file mode 100644
index 0000000..7cff31f
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/buffer.d.ts
@@ -0,0 +1,1765 @@
+declare module "node:buffer" {
+    import { ReadableStream } from "node:stream/web";
+    /**
+     * This function returns `true` if `input` contains only valid UTF-8-encoded data,
+     * including the case in which `input` is empty.
+     *
+     * Throws if the `input` is a detached array buffer.
+     * @since v19.4.0, v18.14.0
+     * @param input The input to validate.
+     */
+    export function isUtf8(input: ArrayBuffer | NodeJS.TypedArray): boolean;
+    /**
+     * This function returns `true` if `input` contains only valid ASCII-encoded data,
+     * including the case in which `input` is empty.
+     *
+     * Throws if the `input` is a detached array buffer.
+     * @since v19.6.0, v18.15.0
+     * @param input The input to validate.
+     */
+    export function isAscii(input: ArrayBuffer | NodeJS.TypedArray): boolean;
+    export let INSPECT_MAX_BYTES: number;
+    export const kMaxLength: number;
+    export const kStringMaxLength: number;
+    export const constants: {
+        MAX_LENGTH: number;
+        MAX_STRING_LENGTH: number;
+    };
+    export type TranscodeEncoding =
+        | "ascii"
+        | "utf8"
+        | "utf-8"
+        | "utf16le"
+        | "utf-16le"
+        | "ucs2"
+        | "ucs-2"
+        | "latin1"
+        | "binary";
+    /**
+     * Re-encodes the given `Buffer` or `Uint8Array` instance from one character
+     * encoding to another. Returns a new `Buffer` instance.
+     *
+     * Throws if the `fromEnc` or `toEnc` specify invalid character encodings or if
+     * conversion from `fromEnc` to `toEnc` is not permitted.
+     *
+     * Encodings supported by `buffer.transcode()` are: `'ascii'`, `'utf8'`, `'utf16le'`, `'ucs2'`, `'latin1'`, and `'binary'`.
+     *
+     * The transcoding process will use substitution characters if a given byte
+     * sequence cannot be adequately represented in the target encoding. For instance:
+     *
+     * ```js
+     * import { Buffer, transcode } from 'node:buffer';
+     *
+     * const newBuf = transcode(Buffer.from('€'), 'utf8', 'ascii');
+     * console.log(newBuf.toString('ascii'));
+     * // Prints: '?'
+     * ```
+     *
+     * Because the Euro (`€`) sign is not representable in US-ASCII, it is replaced
+     * with `?` in the transcoded `Buffer`.
+     * @since v7.1.0
+     * @param source A `Buffer` or `Uint8Array` instance.
+     * @param fromEnc The current encoding.
+     * @param toEnc To target encoding.
+     */
+    export function transcode(
+        source: Uint8Array,
+        fromEnc: TranscodeEncoding,
+        toEnc: TranscodeEncoding,
+    ): NonSharedBuffer;
+    /**
+     * Resolves a `'blob:nodedata:...'` an associated `Blob` object registered using
+     * a prior call to `URL.createObjectURL()`.
+     * @since v16.7.0
+     * @param id A `'blob:nodedata:...` URL string returned by a prior call to `URL.createObjectURL()`.
+     */
+    export function resolveObjectURL(id: string): Blob | undefined;
+    export { type AllowSharedBuffer, Buffer, type NonSharedBuffer };
+    /** @deprecated This alias will be removed in a future version. Use the canonical `BlobPropertyBag` instead. */
+    // TODO: remove in future major
+    export interface BlobOptions extends BlobPropertyBag {}
+    /** @deprecated This alias will be removed in a future version. Use the canonical `FilePropertyBag` instead. */
+    export interface FileOptions extends FilePropertyBag {}
+    export type WithImplicitCoercion<T> =
+        | T
+        | { valueOf(): T }
+        | (T extends string ? { [Symbol.toPrimitive](hint: "string"): T } : never);
+    global {
+        namespace NodeJS {
+            export { BufferEncoding };
+        }
+        // Buffer class
+        type BufferEncoding =
+            | "ascii"
+            | "utf8"
+            | "utf-8"
+            | "utf16le"
+            | "utf-16le"
+            | "ucs2"
+            | "ucs-2"
+            | "base64"
+            | "base64url"
+            | "latin1"
+            | "binary"
+            | "hex";
+        /**
+         * Raw data is stored in instances of the Buffer class.
+         * A Buffer is similar to an array of integers but corresponds to a raw memory allocation outside the V8 heap.  A Buffer cannot be resized.
+         * Valid string encodings: 'ascii'|'utf8'|'utf16le'|'ucs2'(alias of 'utf16le')|'base64'|'base64url'|'binary'(deprecated)|'hex'
+         */
+        interface BufferConstructor {
+            // see buffer.buffer.d.ts for implementation specific to TypeScript 5.7 and later
+            // see ts5.6/buffer.buffer.d.ts for implementation specific to TypeScript 5.6 and earlier
+
+            /**
+             * Returns `true` if `obj` is a `Buffer`, `false` otherwise.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * Buffer.isBuffer(Buffer.alloc(10)); // true
+             * Buffer.isBuffer(Buffer.from('foo')); // true
+             * Buffer.isBuffer('a string'); // false
+             * Buffer.isBuffer([]); // false
+             * Buffer.isBuffer(new Uint8Array(1024)); // false
+             * ```
+             * @since v0.1.101
+             */
+            isBuffer(obj: any): obj is Buffer;
+            /**
+             * Returns `true` if `encoding` is the name of a supported character encoding,
+             * or `false` otherwise.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * console.log(Buffer.isEncoding('utf8'));
+             * // Prints: true
+             *
+             * console.log(Buffer.isEncoding('hex'));
+             * // Prints: true
+             *
+             * console.log(Buffer.isEncoding('utf/8'));
+             * // Prints: false
+             *
+             * console.log(Buffer.isEncoding(''));
+             * // Prints: false
+             * ```
+             * @since v0.9.1
+             * @param encoding A character encoding name to check.
+             */
+            isEncoding(encoding: string): encoding is BufferEncoding;
+            /**
+             * Returns the byte length of a string when encoded using `encoding`.
+             * This is not the same as [`String.prototype.length`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/length), which does not account
+             * for the encoding that is used to convert the string into bytes.
+             *
+             * For `'base64'`, `'base64url'`, and `'hex'`, this function assumes valid input.
+             * For strings that contain non-base64/hex-encoded data (e.g. whitespace), the
+             * return value might be greater than the length of a `Buffer` created from the
+             * string.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const str = '\u00bd + \u00bc = \u00be';
+             *
+             * console.log(`${str}: ${str.length} characters, ` +
+             *             `${Buffer.byteLength(str, 'utf8')} bytes`);
+             * // Prints: ½ + ¼ = ¾: 9 characters, 12 bytes
+             * ```
+             *
+             * When `string` is a
+             * `Buffer`/[`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView)/[`TypedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/-
+             * Reference/Global_Objects/TypedArray)/[`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer)/[`SharedArrayBuffer`](https://develop-
+             * er.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer), the byte length as reported by `.byteLength`is returned.
+             * @since v0.1.90
+             * @param string A value to calculate the length of.
+             * @param [encoding='utf8'] If `string` is a string, this is its encoding.
+             * @return The number of bytes contained within `string`.
+             */
+            byteLength(
+                string: string | NodeJS.ArrayBufferView | ArrayBufferLike,
+                encoding?: BufferEncoding,
+            ): number;
+            /**
+             * Compares `buf1` to `buf2`, typically for the purpose of sorting arrays of `Buffer` instances. This is equivalent to calling `buf1.compare(buf2)`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf1 = Buffer.from('1234');
+             * const buf2 = Buffer.from('0123');
+             * const arr = [buf1, buf2];
+             *
+             * console.log(arr.sort(Buffer.compare));
+             * // Prints: [ <Buffer 30 31 32 33>, <Buffer 31 32 33 34> ]
+             * // (This result is equal to: [buf2, buf1].)
+             * ```
+             * @since v0.11.13
+             * @return Either `-1`, `0`, or `1`, depending on the result of the comparison. See `compare` for details.
+             */
+            compare(buf1: Uint8Array, buf2: Uint8Array): -1 | 0 | 1;
+            /**
+             * This is the size (in bytes) of pre-allocated internal `Buffer` instances used
+             * for pooling. This value may be modified.
+             * @since v0.11.3
+             */
+            poolSize: number;
+        }
+        interface Buffer {
+            // see buffer.buffer.d.ts for implementation specific to TypeScript 5.7 and later
+            // see ts5.6/buffer.buffer.d.ts for implementation specific to TypeScript 5.6 and earlier
+
+            /**
+             * Writes `string` to `buf` at `offset` according to the character encoding in`encoding`. The `length` parameter is the number of bytes to write. If `buf` did
+             * not contain enough space to fit the entire string, only part of `string` will be
+             * written. However, partially encoded characters will not be written.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.alloc(256);
+             *
+             * const len = buf.write('\u00bd + \u00bc = \u00be', 0);
+             *
+             * console.log(`${len} bytes: ${buf.toString('utf8', 0, len)}`);
+             * // Prints: 12 bytes: ½ + ¼ = ¾
+             *
+             * const buffer = Buffer.alloc(10);
+             *
+             * const length = buffer.write('abcd', 8);
+             *
+             * console.log(`${length} bytes: ${buffer.toString('utf8', 8, 10)}`);
+             * // Prints: 2 bytes : ab
+             * ```
+             * @since v0.1.90
+             * @param string String to write to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write `string`.
+             * @param [length=buf.length - offset] Maximum number of bytes to write (written bytes will not exceed `buf.length - offset`).
+             * @param [encoding='utf8'] The character encoding of `string`.
+             * @return Number of bytes written.
+             */
+            write(string: string, encoding?: BufferEncoding): number;
+            write(string: string, offset: number, encoding?: BufferEncoding): number;
+            write(string: string, offset: number, length: number, encoding?: BufferEncoding): number;
+            /**
+             * Decodes `buf` to a string according to the specified character encoding in`encoding`. `start` and `end` may be passed to decode only a subset of `buf`.
+             *
+             * If `encoding` is `'utf8'` and a byte sequence in the input is not valid UTF-8,
+             * then each invalid byte is replaced with the replacement character `U+FFFD`.
+             *
+             * The maximum length of a string instance (in UTF-16 code units) is available
+             * as {@link constants.MAX_STRING_LENGTH}.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf1 = Buffer.allocUnsafe(26);
+             *
+             * for (let i = 0; i < 26; i++) {
+             *   // 97 is the decimal ASCII value for 'a'.
+             *   buf1[i] = i + 97;
+             * }
+             *
+             * console.log(buf1.toString('utf8'));
+             * // Prints: abcdefghijklmnopqrstuvwxyz
+             * console.log(buf1.toString('utf8', 0, 5));
+             * // Prints: abcde
+             *
+             * const buf2 = Buffer.from('tést');
+             *
+             * console.log(buf2.toString('hex'));
+             * // Prints: 74c3a97374
+             * console.log(buf2.toString('utf8', 0, 3));
+             * // Prints: té
+             * console.log(buf2.toString(undefined, 0, 3));
+             * // Prints: té
+             * ```
+             * @since v0.1.90
+             * @param [encoding='utf8'] The character encoding to use.
+             * @param [start=0] The byte offset to start decoding at.
+             * @param [end=buf.length] The byte offset to stop decoding at (not inclusive).
+             */
+            toString(encoding?: BufferEncoding, start?: number, end?: number): string;
+            /**
+             * Returns a JSON representation of `buf`. [`JSON.stringify()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify) implicitly calls
+             * this function when stringifying a `Buffer` instance.
+             *
+             * `Buffer.from()` accepts objects in the format returned from this method.
+             * In particular, `Buffer.from(buf.toJSON())` works like `Buffer.from(buf)`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5]);
+             * const json = JSON.stringify(buf);
+             *
+             * console.log(json);
+             * // Prints: {"type":"Buffer","data":[1,2,3,4,5]}
+             *
+             * const copy = JSON.parse(json, (key, value) => {
+             *   return value &#x26;&#x26; value.type === 'Buffer' ?
+             *     Buffer.from(value) :
+             *     value;
+             * });
+             *
+             * console.log(copy);
+             * // Prints: <Buffer 01 02 03 04 05>
+             * ```
+             * @since v0.9.2
+             */
+            toJSON(): {
+                type: "Buffer";
+                data: number[];
+            };
+            /**
+             * Returns `true` if both `buf` and `otherBuffer` have exactly the same bytes,`false` otherwise. Equivalent to `buf.compare(otherBuffer) === 0`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf1 = Buffer.from('ABC');
+             * const buf2 = Buffer.from('414243', 'hex');
+             * const buf3 = Buffer.from('ABCD');
+             *
+             * console.log(buf1.equals(buf2));
+             * // Prints: true
+             * console.log(buf1.equals(buf3));
+             * // Prints: false
+             * ```
+             * @since v0.11.13
+             * @param otherBuffer A `Buffer` or {@link Uint8Array} with which to compare `buf`.
+             */
+            equals(otherBuffer: Uint8Array): boolean;
+            /**
+             * Compares `buf` with `target` and returns a number indicating whether `buf`comes before, after, or is the same as `target` in sort order.
+             * Comparison is based on the actual sequence of bytes in each `Buffer`.
+             *
+             * * `0` is returned if `target` is the same as `buf`
+             * * `1` is returned if `target` should come _before_`buf` when sorted.
+             * * `-1` is returned if `target` should come _after_`buf` when sorted.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf1 = Buffer.from('ABC');
+             * const buf2 = Buffer.from('BCD');
+             * const buf3 = Buffer.from('ABCD');
+             *
+             * console.log(buf1.compare(buf1));
+             * // Prints: 0
+             * console.log(buf1.compare(buf2));
+             * // Prints: -1
+             * console.log(buf1.compare(buf3));
+             * // Prints: -1
+             * console.log(buf2.compare(buf1));
+             * // Prints: 1
+             * console.log(buf2.compare(buf3));
+             * // Prints: 1
+             * console.log([buf1, buf2, buf3].sort(Buffer.compare));
+             * // Prints: [ <Buffer 41 42 43>, <Buffer 41 42 43 44>, <Buffer 42 43 44> ]
+             * // (This result is equal to: [buf1, buf3, buf2].)
+             * ```
+             *
+             * The optional `targetStart`, `targetEnd`, `sourceStart`, and `sourceEnd` arguments can be used to limit the comparison to specific ranges within `target` and `buf` respectively.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf1 = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8, 9]);
+             * const buf2 = Buffer.from([5, 6, 7, 8, 9, 1, 2, 3, 4]);
+             *
+             * console.log(buf1.compare(buf2, 5, 9, 0, 4));
+             * // Prints: 0
+             * console.log(buf1.compare(buf2, 0, 6, 4));
+             * // Prints: -1
+             * console.log(buf1.compare(buf2, 5, 6, 5));
+             * // Prints: 1
+             * ```
+             *
+             * `ERR_OUT_OF_RANGE` is thrown if `targetStart < 0`, `sourceStart < 0`, `targetEnd > target.byteLength`, or `sourceEnd > source.byteLength`.
+             * @since v0.11.13
+             * @param target A `Buffer` or {@link Uint8Array} with which to compare `buf`.
+             * @param [targetStart=0] The offset within `target` at which to begin comparison.
+             * @param [targetEnd=target.length] The offset within `target` at which to end comparison (not inclusive).
+             * @param [sourceStart=0] The offset within `buf` at which to begin comparison.
+             * @param [sourceEnd=buf.length] The offset within `buf` at which to end comparison (not inclusive).
+             */
+            compare(
+                target: Uint8Array,
+                targetStart?: number,
+                targetEnd?: number,
+                sourceStart?: number,
+                sourceEnd?: number,
+            ): -1 | 0 | 1;
+            /**
+             * Copies data from a region of `buf` to a region in `target`, even if the `target`memory region overlaps with `buf`.
+             *
+             * [`TypedArray.prototype.set()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/set) performs the same operation, and is available
+             * for all TypedArrays, including Node.js `Buffer`s, although it takes
+             * different function arguments.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Create two `Buffer` instances.
+             * const buf1 = Buffer.allocUnsafe(26);
+             * const buf2 = Buffer.allocUnsafe(26).fill('!');
+             *
+             * for (let i = 0; i < 26; i++) {
+             *   // 97 is the decimal ASCII value for 'a'.
+             *   buf1[i] = i + 97;
+             * }
+             *
+             * // Copy `buf1` bytes 16 through 19 into `buf2` starting at byte 8 of `buf2`.
+             * buf1.copy(buf2, 8, 16, 20);
+             * // This is equivalent to:
+             * // buf2.set(buf1.subarray(16, 20), 8);
+             *
+             * console.log(buf2.toString('ascii', 0, 25));
+             * // Prints: !!!!!!!!qrst!!!!!!!!!!!!!
+             * ```
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Create a `Buffer` and copy data from one region to an overlapping region
+             * // within the same `Buffer`.
+             *
+             * const buf = Buffer.allocUnsafe(26);
+             *
+             * for (let i = 0; i < 26; i++) {
+             *   // 97 is the decimal ASCII value for 'a'.
+             *   buf[i] = i + 97;
+             * }
+             *
+             * buf.copy(buf, 0, 4, 10);
+             *
+             * console.log(buf.toString());
+             * // Prints: efghijghijklmnopqrstuvwxyz
+             * ```
+             * @since v0.1.90
+             * @param target A `Buffer` or {@link Uint8Array} to copy into.
+             * @param [targetStart=0] The offset within `target` at which to begin writing.
+             * @param [sourceStart=0] The offset within `buf` from which to begin copying.
+             * @param [sourceEnd=buf.length] The offset within `buf` at which to stop copying (not inclusive).
+             * @return The number of bytes copied.
+             */
+            copy(target: Uint8Array, targetStart?: number, sourceStart?: number, sourceEnd?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as big-endian.
+             *
+             * `value` is interpreted and written as a two's complement signed integer.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(8);
+             *
+             * buf.writeBigInt64BE(0x0102030405060708n, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 01 02 03 04 05 06 07 08>
+             * ```
+             * @since v12.0.0, v10.20.0
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeBigInt64BE(value: bigint, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as little-endian.
+             *
+             * `value` is interpreted and written as a two's complement signed integer.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(8);
+             *
+             * buf.writeBigInt64LE(0x0102030405060708n, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 08 07 06 05 04 03 02 01>
+             * ```
+             * @since v12.0.0, v10.20.0
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeBigInt64LE(value: bigint, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as big-endian.
+             *
+             * This function is also available under the `writeBigUint64BE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(8);
+             *
+             * buf.writeBigUInt64BE(0xdecafafecacefaden, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer de ca fa fe ca ce fa de>
+             * ```
+             * @since v12.0.0, v10.20.0
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeBigUInt64BE(value: bigint, offset?: number): number;
+            /**
+             * @alias Buffer.writeBigUInt64BE
+             * @since v14.10.0, v12.19.0
+             */
+            writeBigUint64BE(value: bigint, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as little-endian
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(8);
+             *
+             * buf.writeBigUInt64LE(0xdecafafecacefaden, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer de fa ce ca fe fa ca de>
+             * ```
+             *
+             * This function is also available under the `writeBigUint64LE` alias.
+             * @since v12.0.0, v10.20.0
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy: `0 <= offset <= buf.length - 8`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeBigUInt64LE(value: bigint, offset?: number): number;
+            /**
+             * @alias Buffer.writeBigUInt64LE
+             * @since v14.10.0, v12.19.0
+             */
+            writeBigUint64LE(value: bigint, offset?: number): number;
+            /**
+             * Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as little-endian. Supports up to 48 bits of accuracy. Behavior is undefined
+             * when `value` is anything other than an unsigned integer.
+             *
+             * This function is also available under the `writeUintLE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(6);
+             *
+             * buf.writeUIntLE(0x1234567890ab, 0, 6);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer ab 90 78 56 34 12>
+             * ```
+             * @since v0.5.5
+             * @param value Number to be written to `buf`.
+             * @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
+             * @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeUIntLE(value: number, offset: number, byteLength: number): number;
+            /**
+             * @alias Buffer.writeUIntLE
+             * @since v14.9.0, v12.19.0
+             */
+            writeUintLE(value: number, offset: number, byteLength: number): number;
+            /**
+             * Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as big-endian. Supports up to 48 bits of accuracy. Behavior is undefined
+             * when `value` is anything other than an unsigned integer.
+             *
+             * This function is also available under the `writeUintBE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(6);
+             *
+             * buf.writeUIntBE(0x1234567890ab, 0, 6);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 12 34 56 78 90 ab>
+             * ```
+             * @since v0.5.5
+             * @param value Number to be written to `buf`.
+             * @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
+             * @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeUIntBE(value: number, offset: number, byteLength: number): number;
+            /**
+             * @alias Buffer.writeUIntBE
+             * @since v14.9.0, v12.19.0
+             */
+            writeUintBE(value: number, offset: number, byteLength: number): number;
+            /**
+             * Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as little-endian. Supports up to 48 bits of accuracy. Behavior is undefined
+             * when `value` is anything other than a signed integer.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(6);
+             *
+             * buf.writeIntLE(0x1234567890ab, 0, 6);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer ab 90 78 56 34 12>
+             * ```
+             * @since v0.11.15
+             * @param value Number to be written to `buf`.
+             * @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
+             * @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeIntLE(value: number, offset: number, byteLength: number): number;
+            /**
+             * Writes `byteLength` bytes of `value` to `buf` at the specified `offset`as big-endian. Supports up to 48 bits of accuracy. Behavior is undefined when`value` is anything other than a
+             * signed integer.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(6);
+             *
+             * buf.writeIntBE(0x1234567890ab, 0, 6);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 12 34 56 78 90 ab>
+             * ```
+             * @since v0.11.15
+             * @param value Number to be written to `buf`.
+             * @param offset Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - byteLength`.
+             * @param byteLength Number of bytes to write. Must satisfy `0 < byteLength <= 6`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeIntBE(value: number, offset: number, byteLength: number): number;
+            /**
+             * Reads an unsigned, big-endian 64-bit integer from `buf` at the specified`offset`.
+             *
+             * This function is also available under the `readBigUint64BE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff]);
+             *
+             * console.log(buf.readBigUInt64BE(0));
+             * // Prints: 4294967295n
+             * ```
+             * @since v12.0.0, v10.20.0
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
+             */
+            readBigUInt64BE(offset?: number): bigint;
+            /**
+             * @alias Buffer.readBigUInt64BE
+             * @since v14.10.0, v12.19.0
+             */
+            readBigUint64BE(offset?: number): bigint;
+            /**
+             * Reads an unsigned, little-endian 64-bit integer from `buf` at the specified`offset`.
+             *
+             * This function is also available under the `readBigUint64LE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff]);
+             *
+             * console.log(buf.readBigUInt64LE(0));
+             * // Prints: 18446744069414584320n
+             * ```
+             * @since v12.0.0, v10.20.0
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
+             */
+            readBigUInt64LE(offset?: number): bigint;
+            /**
+             * @alias Buffer.readBigUInt64LE
+             * @since v14.10.0, v12.19.0
+             */
+            readBigUint64LE(offset?: number): bigint;
+            /**
+             * Reads a signed, big-endian 64-bit integer from `buf` at the specified `offset`.
+             *
+             * Integers read from a `Buffer` are interpreted as two's complement signed
+             * values.
+             * @since v12.0.0, v10.20.0
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
+             */
+            readBigInt64BE(offset?: number): bigint;
+            /**
+             * Reads a signed, little-endian 64-bit integer from `buf` at the specified`offset`.
+             *
+             * Integers read from a `Buffer` are interpreted as two's complement signed
+             * values.
+             * @since v12.0.0, v10.20.0
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy: `0 <= offset <= buf.length - 8`.
+             */
+            readBigInt64LE(offset?: number): bigint;
+            /**
+             * Reads `byteLength` number of bytes from `buf` at the specified `offset` and interprets the result as an unsigned, little-endian integer supporting
+             * up to 48 bits of accuracy.
+             *
+             * This function is also available under the `readUintLE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
+             *
+             * console.log(buf.readUIntLE(0, 6).toString(16));
+             * // Prints: ab9078563412
+             * ```
+             * @since v0.11.15
+             * @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
+             * @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
+             */
+            readUIntLE(offset: number, byteLength: number): number;
+            /**
+             * @alias Buffer.readUIntLE
+             * @since v14.9.0, v12.19.0
+             */
+            readUintLE(offset: number, byteLength: number): number;
+            /**
+             * Reads `byteLength` number of bytes from `buf` at the specified `offset` and interprets the result as an unsigned big-endian integer supporting
+             * up to 48 bits of accuracy.
+             *
+             * This function is also available under the `readUintBE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
+             *
+             * console.log(buf.readUIntBE(0, 6).toString(16));
+             * // Prints: 1234567890ab
+             * console.log(buf.readUIntBE(1, 6).toString(16));
+             * // Throws ERR_OUT_OF_RANGE.
+             * ```
+             * @since v0.11.15
+             * @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
+             * @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
+             */
+            readUIntBE(offset: number, byteLength: number): number;
+            /**
+             * @alias Buffer.readUIntBE
+             * @since v14.9.0, v12.19.0
+             */
+            readUintBE(offset: number, byteLength: number): number;
+            /**
+             * Reads `byteLength` number of bytes from `buf` at the specified `offset` and interprets the result as a little-endian, two's complement signed value
+             * supporting up to 48 bits of accuracy.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
+             *
+             * console.log(buf.readIntLE(0, 6).toString(16));
+             * // Prints: -546f87a9cbee
+             * ```
+             * @since v0.11.15
+             * @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
+             * @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
+             */
+            readIntLE(offset: number, byteLength: number): number;
+            /**
+             * Reads `byteLength` number of bytes from `buf` at the specified `offset` and interprets the result as a big-endian, two's complement signed value
+             * supporting up to 48 bits of accuracy.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78, 0x90, 0xab]);
+             *
+             * console.log(buf.readIntBE(0, 6).toString(16));
+             * // Prints: 1234567890ab
+             * console.log(buf.readIntBE(1, 6).toString(16));
+             * // Throws ERR_OUT_OF_RANGE.
+             * console.log(buf.readIntBE(1, 0).toString(16));
+             * // Throws ERR_OUT_OF_RANGE.
+             * ```
+             * @since v0.11.15
+             * @param offset Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - byteLength`.
+             * @param byteLength Number of bytes to read. Must satisfy `0 < byteLength <= 6`.
+             */
+            readIntBE(offset: number, byteLength: number): number;
+            /**
+             * Reads an unsigned 8-bit integer from `buf` at the specified `offset`.
+             *
+             * This function is also available under the `readUint8` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([1, -2]);
+             *
+             * console.log(buf.readUInt8(0));
+             * // Prints: 1
+             * console.log(buf.readUInt8(1));
+             * // Prints: 254
+             * console.log(buf.readUInt8(2));
+             * // Throws ERR_OUT_OF_RANGE.
+             * ```
+             * @since v0.5.0
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 1`.
+             */
+            readUInt8(offset?: number): number;
+            /**
+             * @alias Buffer.readUInt8
+             * @since v14.9.0, v12.19.0
+             */
+            readUint8(offset?: number): number;
+            /**
+             * Reads an unsigned, little-endian 16-bit integer from `buf` at the specified `offset`.
+             *
+             * This function is also available under the `readUint16LE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0x12, 0x34, 0x56]);
+             *
+             * console.log(buf.readUInt16LE(0).toString(16));
+             * // Prints: 3412
+             * console.log(buf.readUInt16LE(1).toString(16));
+             * // Prints: 5634
+             * console.log(buf.readUInt16LE(2).toString(16));
+             * // Throws ERR_OUT_OF_RANGE.
+             * ```
+             * @since v0.5.5
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
+             */
+            readUInt16LE(offset?: number): number;
+            /**
+             * @alias Buffer.readUInt16LE
+             * @since v14.9.0, v12.19.0
+             */
+            readUint16LE(offset?: number): number;
+            /**
+             * Reads an unsigned, big-endian 16-bit integer from `buf` at the specified`offset`.
+             *
+             * This function is also available under the `readUint16BE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0x12, 0x34, 0x56]);
+             *
+             * console.log(buf.readUInt16BE(0).toString(16));
+             * // Prints: 1234
+             * console.log(buf.readUInt16BE(1).toString(16));
+             * // Prints: 3456
+             * ```
+             * @since v0.5.5
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
+             */
+            readUInt16BE(offset?: number): number;
+            /**
+             * @alias Buffer.readUInt16BE
+             * @since v14.9.0, v12.19.0
+             */
+            readUint16BE(offset?: number): number;
+            /**
+             * Reads an unsigned, little-endian 32-bit integer from `buf` at the specified`offset`.
+             *
+             * This function is also available under the `readUint32LE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78]);
+             *
+             * console.log(buf.readUInt32LE(0).toString(16));
+             * // Prints: 78563412
+             * console.log(buf.readUInt32LE(1).toString(16));
+             * // Throws ERR_OUT_OF_RANGE.
+             * ```
+             * @since v0.5.5
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+             */
+            readUInt32LE(offset?: number): number;
+            /**
+             * @alias Buffer.readUInt32LE
+             * @since v14.9.0, v12.19.0
+             */
+            readUint32LE(offset?: number): number;
+            /**
+             * Reads an unsigned, big-endian 32-bit integer from `buf` at the specified`offset`.
+             *
+             * This function is also available under the `readUint32BE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0x12, 0x34, 0x56, 0x78]);
+             *
+             * console.log(buf.readUInt32BE(0).toString(16));
+             * // Prints: 12345678
+             * ```
+             * @since v0.5.5
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+             */
+            readUInt32BE(offset?: number): number;
+            /**
+             * @alias Buffer.readUInt32BE
+             * @since v14.9.0, v12.19.0
+             */
+            readUint32BE(offset?: number): number;
+            /**
+             * Reads a signed 8-bit integer from `buf` at the specified `offset`.
+             *
+             * Integers read from a `Buffer` are interpreted as two's complement signed values.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([-1, 5]);
+             *
+             * console.log(buf.readInt8(0));
+             * // Prints: -1
+             * console.log(buf.readInt8(1));
+             * // Prints: 5
+             * console.log(buf.readInt8(2));
+             * // Throws ERR_OUT_OF_RANGE.
+             * ```
+             * @since v0.5.0
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 1`.
+             */
+            readInt8(offset?: number): number;
+            /**
+             * Reads a signed, little-endian 16-bit integer from `buf` at the specified`offset`.
+             *
+             * Integers read from a `Buffer` are interpreted as two's complement signed values.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0, 5]);
+             *
+             * console.log(buf.readInt16LE(0));
+             * // Prints: 1280
+             * console.log(buf.readInt16LE(1));
+             * // Throws ERR_OUT_OF_RANGE.
+             * ```
+             * @since v0.5.5
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
+             */
+            readInt16LE(offset?: number): number;
+            /**
+             * Reads a signed, big-endian 16-bit integer from `buf` at the specified `offset`.
+             *
+             * Integers read from a `Buffer` are interpreted as two's complement signed values.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0, 5]);
+             *
+             * console.log(buf.readInt16BE(0));
+             * // Prints: 5
+             * ```
+             * @since v0.5.5
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 2`.
+             */
+            readInt16BE(offset?: number): number;
+            /**
+             * Reads a signed, little-endian 32-bit integer from `buf` at the specified`offset`.
+             *
+             * Integers read from a `Buffer` are interpreted as two's complement signed values.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0, 0, 0, 5]);
+             *
+             * console.log(buf.readInt32LE(0));
+             * // Prints: 83886080
+             * console.log(buf.readInt32LE(1));
+             * // Throws ERR_OUT_OF_RANGE.
+             * ```
+             * @since v0.5.5
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+             */
+            readInt32LE(offset?: number): number;
+            /**
+             * Reads a signed, big-endian 32-bit integer from `buf` at the specified `offset`.
+             *
+             * Integers read from a `Buffer` are interpreted as two's complement signed values.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([0, 0, 0, 5]);
+             *
+             * console.log(buf.readInt32BE(0));
+             * // Prints: 5
+             * ```
+             * @since v0.5.5
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+             */
+            readInt32BE(offset?: number): number;
+            /**
+             * Reads a 32-bit, little-endian float from `buf` at the specified `offset`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([1, 2, 3, 4]);
+             *
+             * console.log(buf.readFloatLE(0));
+             * // Prints: 1.539989614439558e-36
+             * console.log(buf.readFloatLE(1));
+             * // Throws ERR_OUT_OF_RANGE.
+             * ```
+             * @since v0.11.15
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+             */
+            readFloatLE(offset?: number): number;
+            /**
+             * Reads a 32-bit, big-endian float from `buf` at the specified `offset`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([1, 2, 3, 4]);
+             *
+             * console.log(buf.readFloatBE(0));
+             * // Prints: 2.387939260590663e-38
+             * ```
+             * @since v0.11.15
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 4`.
+             */
+            readFloatBE(offset?: number): number;
+            /**
+             * Reads a 64-bit, little-endian double from `buf` at the specified `offset`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8]);
+             *
+             * console.log(buf.readDoubleLE(0));
+             * // Prints: 5.447603722011605e-270
+             * console.log(buf.readDoubleLE(1));
+             * // Throws ERR_OUT_OF_RANGE.
+             * ```
+             * @since v0.11.15
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 8`.
+             */
+            readDoubleLE(offset?: number): number;
+            /**
+             * Reads a 64-bit, big-endian double from `buf` at the specified `offset`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8]);
+             *
+             * console.log(buf.readDoubleBE(0));
+             * // Prints: 8.20788039913184e-304
+             * ```
+             * @since v0.11.15
+             * @param [offset=0] Number of bytes to skip before starting to read. Must satisfy `0 <= offset <= buf.length - 8`.
+             */
+            readDoubleBE(offset?: number): number;
+            reverse(): this;
+            /**
+             * Interprets `buf` as an array of unsigned 16-bit integers and swaps the
+             * byte order _in-place_. Throws `ERR_INVALID_BUFFER_SIZE` if `buf.length` is not a multiple of 2.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);
+             *
+             * console.log(buf1);
+             * // Prints: <Buffer 01 02 03 04 05 06 07 08>
+             *
+             * buf1.swap16();
+             *
+             * console.log(buf1);
+             * // Prints: <Buffer 02 01 04 03 06 05 08 07>
+             *
+             * const buf2 = Buffer.from([0x1, 0x2, 0x3]);
+             *
+             * buf2.swap16();
+             * // Throws ERR_INVALID_BUFFER_SIZE.
+             * ```
+             *
+             * One convenient use of `buf.swap16()` is to perform a fast in-place conversion
+             * between UTF-16 little-endian and UTF-16 big-endian:
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from('This is little-endian UTF-16', 'utf16le');
+             * buf.swap16(); // Convert to big-endian UTF-16 text.
+             * ```
+             * @since v5.10.0
+             * @return A reference to `buf`.
+             */
+            swap16(): this;
+            /**
+             * Interprets `buf` as an array of unsigned 32-bit integers and swaps the
+             * byte order _in-place_. Throws `ERR_INVALID_BUFFER_SIZE` if `buf.length` is not a multiple of 4.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);
+             *
+             * console.log(buf1);
+             * // Prints: <Buffer 01 02 03 04 05 06 07 08>
+             *
+             * buf1.swap32();
+             *
+             * console.log(buf1);
+             * // Prints: <Buffer 04 03 02 01 08 07 06 05>
+             *
+             * const buf2 = Buffer.from([0x1, 0x2, 0x3]);
+             *
+             * buf2.swap32();
+             * // Throws ERR_INVALID_BUFFER_SIZE.
+             * ```
+             * @since v5.10.0
+             * @return A reference to `buf`.
+             */
+            swap32(): this;
+            /**
+             * Interprets `buf` as an array of 64-bit numbers and swaps byte order _in-place_.
+             * Throws `ERR_INVALID_BUFFER_SIZE` if `buf.length` is not a multiple of 8.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf1 = Buffer.from([0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8]);
+             *
+             * console.log(buf1);
+             * // Prints: <Buffer 01 02 03 04 05 06 07 08>
+             *
+             * buf1.swap64();
+             *
+             * console.log(buf1);
+             * // Prints: <Buffer 08 07 06 05 04 03 02 01>
+             *
+             * const buf2 = Buffer.from([0x1, 0x2, 0x3]);
+             *
+             * buf2.swap64();
+             * // Throws ERR_INVALID_BUFFER_SIZE.
+             * ```
+             * @since v6.3.0
+             * @return A reference to `buf`.
+             */
+            swap64(): this;
+            /**
+             * Writes `value` to `buf` at the specified `offset`. `value` must be a
+             * valid unsigned 8-bit integer. Behavior is undefined when `value` is anything
+             * other than an unsigned 8-bit integer.
+             *
+             * This function is also available under the `writeUint8` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(4);
+             *
+             * buf.writeUInt8(0x3, 0);
+             * buf.writeUInt8(0x4, 1);
+             * buf.writeUInt8(0x23, 2);
+             * buf.writeUInt8(0x42, 3);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 03 04 23 42>
+             * ```
+             * @since v0.5.0
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 1`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeUInt8(value: number, offset?: number): number;
+            /**
+             * @alias Buffer.writeUInt8
+             * @since v14.9.0, v12.19.0
+             */
+            writeUint8(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as little-endian. The `value` must be a valid unsigned 16-bit integer. Behavior is undefined when `value` is
+             * anything other than an unsigned 16-bit integer.
+             *
+             * This function is also available under the `writeUint16LE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(4);
+             *
+             * buf.writeUInt16LE(0xdead, 0);
+             * buf.writeUInt16LE(0xbeef, 2);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer ad de ef be>
+             * ```
+             * @since v0.5.5
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeUInt16LE(value: number, offset?: number): number;
+            /**
+             * @alias Buffer.writeUInt16LE
+             * @since v14.9.0, v12.19.0
+             */
+            writeUint16LE(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as big-endian. The `value` must be a valid unsigned 16-bit integer. Behavior is undefined when `value`is anything other than an
+             * unsigned 16-bit integer.
+             *
+             * This function is also available under the `writeUint16BE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(4);
+             *
+             * buf.writeUInt16BE(0xdead, 0);
+             * buf.writeUInt16BE(0xbeef, 2);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer de ad be ef>
+             * ```
+             * @since v0.5.5
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeUInt16BE(value: number, offset?: number): number;
+            /**
+             * @alias Buffer.writeUInt16BE
+             * @since v14.9.0, v12.19.0
+             */
+            writeUint16BE(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as little-endian. The `value` must be a valid unsigned 32-bit integer. Behavior is undefined when `value` is
+             * anything other than an unsigned 32-bit integer.
+             *
+             * This function is also available under the `writeUint32LE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(4);
+             *
+             * buf.writeUInt32LE(0xfeedface, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer ce fa ed fe>
+             * ```
+             * @since v0.5.5
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeUInt32LE(value: number, offset?: number): number;
+            /**
+             * @alias Buffer.writeUInt32LE
+             * @since v14.9.0, v12.19.0
+             */
+            writeUint32LE(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as big-endian. The `value` must be a valid unsigned 32-bit integer. Behavior is undefined when `value`is anything other than an
+             * unsigned 32-bit integer.
+             *
+             * This function is also available under the `writeUint32BE` alias.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(4);
+             *
+             * buf.writeUInt32BE(0xfeedface, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer fe ed fa ce>
+             * ```
+             * @since v0.5.5
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeUInt32BE(value: number, offset?: number): number;
+            /**
+             * @alias Buffer.writeUInt32BE
+             * @since v14.9.0, v12.19.0
+             */
+            writeUint32BE(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset`. `value` must be a valid
+             * signed 8-bit integer. Behavior is undefined when `value` is anything other than
+             * a signed 8-bit integer.
+             *
+             * `value` is interpreted and written as a two's complement signed integer.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(2);
+             *
+             * buf.writeInt8(2, 0);
+             * buf.writeInt8(-2, 1);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 02 fe>
+             * ```
+             * @since v0.5.0
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 1`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeInt8(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as little-endian.  The `value` must be a valid signed 16-bit integer. Behavior is undefined when `value` is
+             * anything other than a signed 16-bit integer.
+             *
+             * The `value` is interpreted and written as a two's complement signed integer.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(2);
+             *
+             * buf.writeInt16LE(0x0304, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 04 03>
+             * ```
+             * @since v0.5.5
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeInt16LE(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as big-endian.  The `value` must be a valid signed 16-bit integer. Behavior is undefined when `value` is
+             * anything other than a signed 16-bit integer.
+             *
+             * The `value` is interpreted and written as a two's complement signed integer.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(2);
+             *
+             * buf.writeInt16BE(0x0102, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 01 02>
+             * ```
+             * @since v0.5.5
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 2`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeInt16BE(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as little-endian. The `value` must be a valid signed 32-bit integer. Behavior is undefined when `value` is
+             * anything other than a signed 32-bit integer.
+             *
+             * The `value` is interpreted and written as a two's complement signed integer.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(4);
+             *
+             * buf.writeInt32LE(0x05060708, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 08 07 06 05>
+             * ```
+             * @since v0.5.5
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeInt32LE(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as big-endian. The `value` must be a valid signed 32-bit integer. Behavior is undefined when `value` is
+             * anything other than a signed 32-bit integer.
+             *
+             * The `value` is interpreted and written as a two's complement signed integer.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(4);
+             *
+             * buf.writeInt32BE(0x01020304, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 01 02 03 04>
+             * ```
+             * @since v0.5.5
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeInt32BE(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as little-endian. Behavior is
+             * undefined when `value` is anything other than a JavaScript number.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(4);
+             *
+             * buf.writeFloatLE(0xcafebabe, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer bb fe 4a 4f>
+             * ```
+             * @since v0.11.15
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeFloatLE(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as big-endian. Behavior is
+             * undefined when `value` is anything other than a JavaScript number.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(4);
+             *
+             * buf.writeFloatBE(0xcafebabe, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 4f 4a fe bb>
+             * ```
+             * @since v0.11.15
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 4`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeFloatBE(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as little-endian. The `value` must be a JavaScript number. Behavior is undefined when `value` is anything
+             * other than a JavaScript number.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(8);
+             *
+             * buf.writeDoubleLE(123.456, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 77 be 9f 1a 2f dd 5e 40>
+             * ```
+             * @since v0.11.15
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 8`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeDoubleLE(value: number, offset?: number): number;
+            /**
+             * Writes `value` to `buf` at the specified `offset` as big-endian. The `value` must be a JavaScript number. Behavior is undefined when `value` is anything
+             * other than a JavaScript number.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(8);
+             *
+             * buf.writeDoubleBE(123.456, 0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 40 5e dd 2f 1a 9f be 77>
+             * ```
+             * @since v0.11.15
+             * @param value Number to be written to `buf`.
+             * @param [offset=0] Number of bytes to skip before starting to write. Must satisfy `0 <= offset <= buf.length - 8`.
+             * @return `offset` plus the number of bytes written.
+             */
+            writeDoubleBE(value: number, offset?: number): number;
+            /**
+             * Fills `buf` with the specified `value`. If the `offset` and `end` are not given,
+             * the entire `buf` will be filled:
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Fill a `Buffer` with the ASCII character 'h'.
+             *
+             * const b = Buffer.allocUnsafe(50).fill('h');
+             *
+             * console.log(b.toString());
+             * // Prints: hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
+             *
+             * // Fill a buffer with empty string
+             * const c = Buffer.allocUnsafe(5).fill('');
+             *
+             * console.log(c.fill(''));
+             * // Prints: <Buffer 00 00 00 00 00>
+             * ```
+             *
+             * `value` is coerced to a `uint32` value if it is not a string, `Buffer`, or
+             * integer. If the resulting integer is greater than `255` (decimal), `buf` will be
+             * filled with `value &#x26; 255`.
+             *
+             * If the final write of a `fill()` operation falls on a multi-byte character,
+             * then only the bytes of that character that fit into `buf` are written:
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Fill a `Buffer` with character that takes up two bytes in UTF-8.
+             *
+             * console.log(Buffer.allocUnsafe(5).fill('\u0222'));
+             * // Prints: <Buffer c8 a2 c8 a2 c8>
+             * ```
+             *
+             * If `value` contains invalid characters, it is truncated; if no valid
+             * fill data remains, an exception is thrown:
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(5);
+             *
+             * console.log(buf.fill('a'));
+             * // Prints: <Buffer 61 61 61 61 61>
+             * console.log(buf.fill('aazz', 'hex'));
+             * // Prints: <Buffer aa aa aa aa aa>
+             * console.log(buf.fill('zz', 'hex'));
+             * // Throws an exception.
+             * ```
+             * @since v0.5.0
+             * @param value The value with which to fill `buf`. Empty value (string, Uint8Array, Buffer) is coerced to `0`.
+             * @param [offset=0] Number of bytes to skip before starting to fill `buf`.
+             * @param [end=buf.length] Where to stop filling `buf` (not inclusive).
+             * @param [encoding='utf8'] The encoding for `value` if `value` is a string.
+             * @return A reference to `buf`.
+             */
+            fill(value: string | Uint8Array | number, offset?: number, end?: number, encoding?: BufferEncoding): this;
+            fill(value: string | Uint8Array | number, offset: number, encoding: BufferEncoding): this;
+            fill(value: string | Uint8Array | number, encoding: BufferEncoding): this;
+            /**
+             * If `value` is:
+             *
+             * * a string, `value` is interpreted according to the character encoding in `encoding`.
+             * * a `Buffer` or [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array), `value` will be used in its entirety.
+             * To compare a partial `Buffer`, use `buf.subarray`.
+             * * a number, `value` will be interpreted as an unsigned 8-bit integer
+             * value between `0` and `255`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from('this is a buffer');
+             *
+             * console.log(buf.indexOf('this'));
+             * // Prints: 0
+             * console.log(buf.indexOf('is'));
+             * // Prints: 2
+             * console.log(buf.indexOf(Buffer.from('a buffer')));
+             * // Prints: 8
+             * console.log(buf.indexOf(97));
+             * // Prints: 8 (97 is the decimal ASCII value for 'a')
+             * console.log(buf.indexOf(Buffer.from('a buffer example')));
+             * // Prints: -1
+             * console.log(buf.indexOf(Buffer.from('a buffer example').slice(0, 8)));
+             * // Prints: 8
+             *
+             * const utf16Buffer = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'utf16le');
+             *
+             * console.log(utf16Buffer.indexOf('\u03a3', 0, 'utf16le'));
+             * // Prints: 4
+             * console.log(utf16Buffer.indexOf('\u03a3', -4, 'utf16le'));
+             * // Prints: 6
+             * ```
+             *
+             * If `value` is not a string, number, or `Buffer`, this method will throw a `TypeError`. If `value` is a number, it will be coerced to a valid byte value,
+             * an integer between 0 and 255.
+             *
+             * If `byteOffset` is not a number, it will be coerced to a number. If the result
+             * of coercion is `NaN` or `0`, then the entire buffer will be searched. This
+             * behavior matches [`String.prototype.indexOf()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/indexOf).
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const b = Buffer.from('abcdef');
+             *
+             * // Passing a value that's a number, but not a valid byte.
+             * // Prints: 2, equivalent to searching for 99 or 'c'.
+             * console.log(b.indexOf(99.9));
+             * console.log(b.indexOf(256 + 99));
+             *
+             * // Passing a byteOffset that coerces to NaN or 0.
+             * // Prints: 1, searching the whole buffer.
+             * console.log(b.indexOf('b', undefined));
+             * console.log(b.indexOf('b', {}));
+             * console.log(b.indexOf('b', null));
+             * console.log(b.indexOf('b', []));
+             * ```
+             *
+             * If `value` is an empty string or empty `Buffer` and `byteOffset` is less
+             * than `buf.length`, `byteOffset` will be returned. If `value` is empty and`byteOffset` is at least `buf.length`, `buf.length` will be returned.
+             * @since v1.5.0
+             * @param value What to search for.
+             * @param [byteOffset=0] Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
+             * @param [encoding='utf8'] If `value` is a string, this is the encoding used to determine the binary representation of the string that will be searched for in `buf`.
+             * @return The index of the first occurrence of `value` in `buf`, or `-1` if `buf` does not contain `value`.
+             */
+            indexOf(value: string | number | Uint8Array, byteOffset?: number, encoding?: BufferEncoding): number;
+            indexOf(value: string | number | Uint8Array, encoding: BufferEncoding): number;
+            /**
+             * Identical to `buf.indexOf()`, except the last occurrence of `value` is found
+             * rather than the first occurrence.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from('this buffer is a buffer');
+             *
+             * console.log(buf.lastIndexOf('this'));
+             * // Prints: 0
+             * console.log(buf.lastIndexOf('buffer'));
+             * // Prints: 17
+             * console.log(buf.lastIndexOf(Buffer.from('buffer')));
+             * // Prints: 17
+             * console.log(buf.lastIndexOf(97));
+             * // Prints: 15 (97 is the decimal ASCII value for 'a')
+             * console.log(buf.lastIndexOf(Buffer.from('yolo')));
+             * // Prints: -1
+             * console.log(buf.lastIndexOf('buffer', 5));
+             * // Prints: 5
+             * console.log(buf.lastIndexOf('buffer', 4));
+             * // Prints: -1
+             *
+             * const utf16Buffer = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'utf16le');
+             *
+             * console.log(utf16Buffer.lastIndexOf('\u03a3', undefined, 'utf16le'));
+             * // Prints: 6
+             * console.log(utf16Buffer.lastIndexOf('\u03a3', -5, 'utf16le'));
+             * // Prints: 4
+             * ```
+             *
+             * If `value` is not a string, number, or `Buffer`, this method will throw a `TypeError`. If `value` is a number, it will be coerced to a valid byte value,
+             * an integer between 0 and 255.
+             *
+             * If `byteOffset` is not a number, it will be coerced to a number. Any arguments
+             * that coerce to `NaN`, like `{}` or `undefined`, will search the whole buffer.
+             * This behavior matches [`String.prototype.lastIndexOf()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/lastIndexOf).
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const b = Buffer.from('abcdef');
+             *
+             * // Passing a value that's a number, but not a valid byte.
+             * // Prints: 2, equivalent to searching for 99 or 'c'.
+             * console.log(b.lastIndexOf(99.9));
+             * console.log(b.lastIndexOf(256 + 99));
+             *
+             * // Passing a byteOffset that coerces to NaN.
+             * // Prints: 1, searching the whole buffer.
+             * console.log(b.lastIndexOf('b', undefined));
+             * console.log(b.lastIndexOf('b', {}));
+             *
+             * // Passing a byteOffset that coerces to 0.
+             * // Prints: -1, equivalent to passing 0.
+             * console.log(b.lastIndexOf('b', null));
+             * console.log(b.lastIndexOf('b', []));
+             * ```
+             *
+             * If `value` is an empty string or empty `Buffer`, `byteOffset` will be returned.
+             * @since v6.0.0
+             * @param value What to search for.
+             * @param [byteOffset=buf.length - 1] Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
+             * @param [encoding='utf8'] If `value` is a string, this is the encoding used to determine the binary representation of the string that will be searched for in `buf`.
+             * @return The index of the last occurrence of `value` in `buf`, or `-1` if `buf` does not contain `value`.
+             */
+            lastIndexOf(value: string | number | Uint8Array, byteOffset?: number, encoding?: BufferEncoding): number;
+            lastIndexOf(value: string | number | Uint8Array, encoding: BufferEncoding): number;
+            /**
+             * Equivalent to `buf.indexOf() !== -1`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from('this is a buffer');
+             *
+             * console.log(buf.includes('this'));
+             * // Prints: true
+             * console.log(buf.includes('is'));
+             * // Prints: true
+             * console.log(buf.includes(Buffer.from('a buffer')));
+             * // Prints: true
+             * console.log(buf.includes(97));
+             * // Prints: true (97 is the decimal ASCII value for 'a')
+             * console.log(buf.includes(Buffer.from('a buffer example')));
+             * // Prints: false
+             * console.log(buf.includes(Buffer.from('a buffer example').slice(0, 8)));
+             * // Prints: true
+             * console.log(buf.includes('this', 4));
+             * // Prints: false
+             * ```
+             * @since v5.3.0
+             * @param value What to search for.
+             * @param [byteOffset=0] Where to begin searching in `buf`. If negative, then offset is calculated from the end of `buf`.
+             * @param [encoding='utf8'] If `value` is a string, this is its encoding.
+             * @return `true` if `value` was found in `buf`, `false` otherwise.
+             */
+            includes(value: string | number | Buffer, byteOffset?: number, encoding?: BufferEncoding): boolean;
+            includes(value: string | number | Buffer, encoding: BufferEncoding): boolean;
+        }
+        var Buffer: BufferConstructor;
+    }
+    // #region web types
+    export type BlobPart = NodeJS.BufferSource | Blob | string;
+    export interface BlobPropertyBag {
+        endings?: "native" | "transparent";
+        type?: string;
+    }
+    export interface FilePropertyBag extends BlobPropertyBag {
+        lastModified?: number;
+    }
+    export interface Blob {
+        readonly size: number;
+        readonly type: string;
+        arrayBuffer(): Promise<ArrayBuffer>;
+        bytes(): Promise<NodeJS.NonSharedUint8Array>;
+        slice(start?: number, end?: number, contentType?: string): Blob;
+        stream(): ReadableStream<NodeJS.NonSharedUint8Array>;
+        text(): Promise<string>;
+    }
+    export var Blob: {
+        prototype: Blob;
+        new(blobParts?: BlobPart[], options?: BlobPropertyBag): Blob;
+    };
+    export interface File extends Blob {
+        readonly lastModified: number;
+        readonly name: string;
+        readonly webkitRelativePath: string;
+    }
+    export var File: {
+        prototype: File;
+        new(fileBits: BlobPart[], fileName: string, options?: FilePropertyBag): File;
+    };
+    export import atob = globalThis.atob;
+    export import btoa = globalThis.btoa;
+    // #endregion
+}
+declare module "buffer" {
+    export * from "node:buffer";
+}
diff --git a/mqtt-backend/node_modules/@types/node/child_process.d.ts b/mqtt-backend/node_modules/@types/node/child_process.d.ts
new file mode 100644
index 0000000..e3964ab
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/child_process.d.ts
@@ -0,0 +1,1366 @@
+declare module "node:child_process" {
+    import { NonSharedBuffer } from "node:buffer";
+    import * as dgram from "node:dgram";
+    import { Abortable, EventEmitter, InternalEventEmitter } from "node:events";
+    import * as net from "node:net";
+    import { Readable, Stream, Writable } from "node:stream";
+    import { URL } from "node:url";
+    type Serializable = string | object | number | boolean | bigint;
+    type SendHandle = net.Socket | net.Server | dgram.Socket | undefined;
+    interface ChildProcessEventMap {
+        "close": [code: number | null, signal: NodeJS.Signals | null];
+        "disconnect": [];
+        "error": [err: Error];
+        "exit": [code: number | null, signal: NodeJS.Signals | null];
+        "message": [message: Serializable, sendHandle: SendHandle];
+        "spawn": [];
+    }
+    /**
+     * Instances of the `ChildProcess` represent spawned child processes.
+     *
+     * Instances of `ChildProcess` are not intended to be created directly. Rather,
+     * use the {@link spawn}, {@link exec},{@link execFile}, or {@link fork} methods to create
+     * instances of `ChildProcess`.
+     * @since v2.2.0
+     */
+    class ChildProcess implements EventEmitter {
+        /**
+         * A `Writable Stream` that represents the child process's `stdin`.
+         *
+         * If a child process waits to read all of its input, the child will not continue
+         * until this stream has been closed via `end()`.
+         *
+         * If the child was spawned with `stdio[0]` set to anything other than `'pipe'`,
+         * then this will be `null`.
+         *
+         * `subprocess.stdin` is an alias for `subprocess.stdio[0]`. Both properties will
+         * refer to the same value.
+         *
+         * The `subprocess.stdin` property can be `null` or `undefined` if the child process could not be successfully spawned.
+         * @since v0.1.90
+         */
+        stdin: Writable | null;
+        /**
+         * A `Readable Stream` that represents the child process's `stdout`.
+         *
+         * If the child was spawned with `stdio[1]` set to anything other than `'pipe'`,
+         * then this will be `null`.
+         *
+         * `subprocess.stdout` is an alias for `subprocess.stdio[1]`. Both properties will
+         * refer to the same value.
+         *
+         * ```js
+         * import { spawn } from 'node:child_process';
+         *
+         * const subprocess = spawn('ls');
+         *
+         * subprocess.stdout.on('data', (data) => {
+         *   console.log(`Received chunk ${data}`);
+         * });
+         * ```
+         *
+         * The `subprocess.stdout` property can be `null` or `undefined` if the child process could not be successfully spawned.
+         * @since v0.1.90
+         */
+        stdout: Readable | null;
+        /**
+         * A `Readable Stream` that represents the child process's `stderr`.
+         *
+         * If the child was spawned with `stdio[2]` set to anything other than `'pipe'`,
+         * then this will be `null`.
+         *
+         * `subprocess.stderr` is an alias for `subprocess.stdio[2]`. Both properties will
+         * refer to the same value.
+         *
+         * The `subprocess.stderr` property can be `null` or `undefined` if the child process could not be successfully spawned.
+         * @since v0.1.90
+         */
+        stderr: Readable | null;
+        /**
+         * The `subprocess.channel` property is a reference to the child's IPC channel. If
+         * no IPC channel exists, this property is `undefined`.
+         * @since v7.1.0
+         */
+        readonly channel?: Control | null;
+        /**
+         * A sparse array of pipes to the child process, corresponding with positions in
+         * the `stdio` option passed to {@link spawn} that have been set
+         * to the value `'pipe'`. `subprocess.stdio[0]`, `subprocess.stdio[1]`, and `subprocess.stdio[2]` are also available as `subprocess.stdin`, `subprocess.stdout`, and `subprocess.stderr`,
+         * respectively.
+         *
+         * In the following example, only the child's fd `1` (stdout) is configured as a
+         * pipe, so only the parent's `subprocess.stdio[1]` is a stream, all other values
+         * in the array are `null`.
+         *
+         * ```js
+         * import assert from 'node:assert';
+         * import fs from 'node:fs';
+         * import child_process from 'node:child_process';
+         *
+         * const subprocess = child_process.spawn('ls', {
+         *   stdio: [
+         *     0, // Use parent's stdin for child.
+         *     'pipe', // Pipe child's stdout to parent.
+         *     fs.openSync('err.out', 'w'), // Direct child's stderr to a file.
+         *   ],
+         * });
+         *
+         * assert.strictEqual(subprocess.stdio[0], null);
+         * assert.strictEqual(subprocess.stdio[0], subprocess.stdin);
+         *
+         * assert(subprocess.stdout);
+         * assert.strictEqual(subprocess.stdio[1], subprocess.stdout);
+         *
+         * assert.strictEqual(subprocess.stdio[2], null);
+         * assert.strictEqual(subprocess.stdio[2], subprocess.stderr);
+         * ```
+         *
+         * The `subprocess.stdio` property can be `undefined` if the child process could
+         * not be successfully spawned.
+         * @since v0.7.10
+         */
+        readonly stdio: [
+            Writable | null,
+            // stdin
+            Readable | null,
+            // stdout
+            Readable | null,
+            // stderr
+            Readable | Writable | null | undefined,
+            // extra
+            Readable | Writable | null | undefined, // extra
+        ];
+        /**
+         * The `subprocess.killed` property indicates whether the child process
+         * successfully received a signal from `subprocess.kill()`. The `killed` property
+         * does not indicate that the child process has been terminated.
+         * @since v0.5.10
+         */
+        readonly killed: boolean;
+        /**
+         * Returns the process identifier (PID) of the child process. If the child process
+         * fails to spawn due to errors, then the value is `undefined` and `error` is
+         * emitted.
+         *
+         * ```js
+         * import { spawn } from 'node:child_process';
+         * const grep = spawn('grep', ['ssh']);
+         *
+         * console.log(`Spawned child pid: ${grep.pid}`);
+         * grep.stdin.end();
+         * ```
+         * @since v0.1.90
+         */
+        readonly pid?: number | undefined;
+        /**
+         * The `subprocess.connected` property indicates whether it is still possible to
+         * send and receive messages from a child process. When `subprocess.connected` is `false`, it is no longer possible to send or receive messages.
+         * @since v0.7.2
+         */
+        readonly connected: boolean;
+        /**
+         * The `subprocess.exitCode` property indicates the exit code of the child process.
+         * If the child process is still running, the field will be `null`.
+         *
+         * When the child process is terminated by a signal, `subprocess.exitCode` will be
+         * `null` and `subprocess.signalCode` will be set. To get the corresponding
+         * POSIX exit code, use
+         * `util.convertProcessSignalToExitCode(subprocess.signalCode)`.
+         */
+        readonly exitCode: number | null;
+        /**
+         * The `subprocess.signalCode` property indicates the signal received by
+         * the child process if any, else `null`.
+         */
+        readonly signalCode: NodeJS.Signals | null;
+        /**
+         * The `subprocess.spawnargs` property represents the full list of command-line
+         * arguments the child process was launched with.
+         */
+        readonly spawnargs: string[];
+        /**
+         * The `subprocess.spawnfile` property indicates the executable file name of
+         * the child process that is launched.
+         *
+         * For {@link fork}, its value will be equal to `process.execPath`.
+         * For {@link spawn}, its value will be the name of
+         * the executable file.
+         * For {@link exec},  its value will be the name of the shell
+         * in which the child process is launched.
+         */
+        readonly spawnfile: string;
+        /**
+         * The `subprocess.kill()` method sends a signal to the child process. If no
+         * argument is given, the process will be sent the `'SIGTERM'` signal. See [`signal(7)`](http://man7.org/linux/man-pages/man7/signal.7.html) for a list of available signals. This function
+         * returns `true` if [`kill(2)`](http://man7.org/linux/man-pages/man2/kill.2.html) succeeds, and `false` otherwise.
+         *
+         * ```js
+         * import { spawn } from 'node:child_process';
+         * const grep = spawn('grep', ['ssh']);
+         *
+         * grep.on('close', (code, signal) => {
+         *   console.log(
+         *     `child process terminated due to receipt of signal ${signal}`);
+         * });
+         *
+         * // Send SIGHUP to process.
+         * grep.kill('SIGHUP');
+         * ```
+         *
+         * The `ChildProcess` object may emit an `'error'` event if the signal
+         * cannot be delivered. Sending a signal to a child process that has already exited
+         * is not an error but may have unforeseen consequences. Specifically, if the
+         * process identifier (PID) has been reassigned to another process, the signal will
+         * be delivered to that process instead which can have unexpected results.
+         *
+         * While the function is called `kill`, the signal delivered to the child process
+         * may not actually terminate the process.
+         *
+         * See [`kill(2)`](http://man7.org/linux/man-pages/man2/kill.2.html) for reference.
+         *
+         * On Windows, where POSIX signals do not exist, the `signal` argument will be
+         * ignored, and the process will be killed forcefully and abruptly (similar to `'SIGKILL'`).
+         * See `Signal Events` for more details.
+         *
+         * On Linux, child processes of child processes will not be terminated
+         * when attempting to kill their parent. This is likely to happen when running a
+         * new process in a shell or with the use of the `shell` option of `ChildProcess`:
+         *
+         * ```js
+         * 'use strict';
+         * import { spawn } from 'node:child_process';
+         *
+         * const subprocess = spawn(
+         *   'sh',
+         *   [
+         *     '-c',
+         *     `node -e "setInterval(() => {
+         *       console.log(process.pid, 'is alive')
+         *     }, 500);"`,
+         *   ], {
+         *     stdio: ['inherit', 'inherit', 'inherit'],
+         *   },
+         * );
+         *
+         * setTimeout(() => {
+         *   subprocess.kill(); // Does not terminate the Node.js process in the shell.
+         * }, 2000);
+         * ```
+         * @since v0.1.90
+         */
+        kill(signal?: NodeJS.Signals | number): boolean;
+        /**
+         * Calls {@link ChildProcess.kill} with `'SIGTERM'`.
+         * @since v20.5.0
+         */
+        [Symbol.dispose](): void;
+        /**
+         * When an IPC channel has been established between the parent and child (
+         * i.e. when using {@link fork}), the `subprocess.send()` method can
+         * be used to send messages to the child process. When the child process is a
+         * Node.js instance, these messages can be received via the `'message'` event.
+         *
+         * The message goes through serialization and parsing. The resulting
+         * message might not be the same as what is originally sent.
+         *
+         * For example, in the parent script:
+         *
+         * ```js
+         * import cp from 'node:child_process';
+         * const n = cp.fork(`${__dirname}/sub.js`);
+         *
+         * n.on('message', (m) => {
+         *   console.log('PARENT got message:', m);
+         * });
+         *
+         * // Causes the child to print: CHILD got message: { hello: 'world' }
+         * n.send({ hello: 'world' });
+         * ```
+         *
+         * And then the child script, `'sub.js'` might look like this:
+         *
+         * ```js
+         * process.on('message', (m) => {
+         *   console.log('CHILD got message:', m);
+         * });
+         *
+         * // Causes the parent to print: PARENT got message: { foo: 'bar', baz: null }
+         * process.send({ foo: 'bar', baz: NaN });
+         * ```
+         *
+         * Child Node.js processes will have a `process.send()` method of their own
+         * that allows the child to send messages back to the parent.
+         *
+         * There is a special case when sending a `{cmd: 'NODE_foo'}` message. Messages
+         * containing a `NODE_` prefix in the `cmd` property are reserved for use within
+         * Node.js core and will not be emitted in the child's `'message'` event. Rather, such messages are emitted using the `'internalMessage'` event and are consumed internally by Node.js.
+         * Applications should avoid using such messages or listening for `'internalMessage'` events as it is subject to change without notice.
+         *
+         * The optional `sendHandle` argument that may be passed to `subprocess.send()` is
+         * for passing a TCP server or socket object to the child process. The child will
+         * receive the object as the second argument passed to the callback function
+         * registered on the `'message'` event. Any data that is received and buffered in
+         * the socket will not be sent to the child. Sending IPC sockets is not supported on Windows.
+         *
+         * The optional `callback` is a function that is invoked after the message is
+         * sent but before the child may have received it. The function is called with a
+         * single argument: `null` on success, or an `Error` object on failure.
+         *
+         * If no `callback` function is provided and the message cannot be sent, an `'error'` event will be emitted by the `ChildProcess` object. This can
+         * happen, for instance, when the child process has already exited.
+         *
+         * `subprocess.send()` will return `false` if the channel has closed or when the
+         * backlog of unsent messages exceeds a threshold that makes it unwise to send
+         * more. Otherwise, the method returns `true`. The `callback` function can be
+         * used to implement flow control.
+         *
+         * #### Example: sending a server object
+         *
+         * The `sendHandle` argument can be used, for instance, to pass the handle of
+         * a TCP server object to the child process as illustrated in the example below:
+         *
+         * ```js
+         * import { createServer } from 'node:net';
+         * import { fork } from 'node:child_process';
+         * const subprocess = fork('subprocess.js');
+         *
+         * // Open up the server object and send the handle.
+         * const server = createServer();
+         * server.on('connection', (socket) => {
+         *   socket.end('handled by parent');
+         * });
+         * server.listen(1337, () => {
+         *   subprocess.send('server', server);
+         * });
+         * ```
+         *
+         * The child would then receive the server object as:
+         *
+         * ```js
+         * process.on('message', (m, server) => {
+         *   if (m === 'server') {
+         *     server.on('connection', (socket) => {
+         *       socket.end('handled by child');
+         *     });
+         *   }
+         * });
+         * ```
+         *
+         * Once the server is now shared between the parent and child, some connections
+         * can be handled by the parent and some by the child.
+         *
+         * While the example above uses a server created using the `node:net` module, `node:dgram` module servers use exactly the same workflow with the exceptions of
+         * listening on a `'message'` event instead of `'connection'` and using `server.bind()` instead of `server.listen()`. This is, however, only
+         * supported on Unix platforms.
+         *
+         * #### Example: sending a socket object
+         *
+         * Similarly, the `sendHandler` argument can be used to pass the handle of a
+         * socket to the child process. The example below spawns two children that each
+         * handle connections with "normal" or "special" priority:
+         *
+         * ```js
+         * import { createServer } from 'node:net';
+         * import { fork } from 'node:child_process';
+         * const normal = fork('subprocess.js', ['normal']);
+         * const special = fork('subprocess.js', ['special']);
+         *
+         * // Open up the server and send sockets to child. Use pauseOnConnect to prevent
+         * // the sockets from being read before they are sent to the child process.
+         * const server = createServer({ pauseOnConnect: true });
+         * server.on('connection', (socket) => {
+         *
+         *   // If this is special priority...
+         *   if (socket.remoteAddress === '74.125.127.100') {
+         *     special.send('socket', socket);
+         *     return;
+         *   }
+         *   // This is normal priority.
+         *   normal.send('socket', socket);
+         * });
+         * server.listen(1337);
+         * ```
+         *
+         * The `subprocess.js` would receive the socket handle as the second argument
+         * passed to the event callback function:
+         *
+         * ```js
+         * process.on('message', (m, socket) => {
+         *   if (m === 'socket') {
+         *     if (socket) {
+         *       // Check that the client socket exists.
+         *       // It is possible for the socket to be closed between the time it is
+         *       // sent and the time it is received in the child process.
+         *       socket.end(`Request handled with ${process.argv[2]} priority`);
+         *     }
+         *   }
+         * });
+         * ```
+         *
+         * Do not use `.maxConnections` on a socket that has been passed to a subprocess.
+         * The parent cannot track when the socket is destroyed.
+         *
+         * Any `'message'` handlers in the subprocess should verify that `socket` exists,
+         * as the connection may have been closed during the time it takes to send the
+         * connection to the child.
+         * @since v0.5.9
+         * @param sendHandle `undefined`, or a [`net.Socket`](https://nodejs.org/docs/latest-v25.x/api/net.html#class-netsocket), [`net.Server`](https://nodejs.org/docs/latest-v25.x/api/net.html#class-netserver), or [`dgram.Socket`](https://nodejs.org/docs/latest-v25.x/api/dgram.html#class-dgramsocket) object.
+         * @param options The `options` argument, if present, is an object used to parameterize the sending of certain types of handles. `options` supports the following properties:
+         */
+        send(message: Serializable, callback?: (error: Error | null) => void): boolean;
+        send(message: Serializable, sendHandle?: SendHandle, callback?: (error: Error | null) => void): boolean;
+        send(
+            message: Serializable,
+            sendHandle?: SendHandle,
+            options?: MessageOptions,
+            callback?: (error: Error | null) => void,
+        ): boolean;
+        /**
+         * Closes the IPC channel between parent and child, allowing the child to exit
+         * gracefully once there are no other connections keeping it alive. After calling
+         * this method the `subprocess.connected` and `process.connected` properties in
+         * both the parent and child (respectively) will be set to `false`, and it will be
+         * no longer possible to pass messages between the processes.
+         *
+         * The `'disconnect'` event will be emitted when there are no messages in the
+         * process of being received. This will most often be triggered immediately after
+         * calling `subprocess.disconnect()`.
+         *
+         * When the child process is a Node.js instance (e.g. spawned using {@link fork}), the `process.disconnect()` method can be invoked
+         * within the child process to close the IPC channel as well.
+         * @since v0.7.2
+         */
+        disconnect(): void;
+        /**
+         * By default, the parent will wait for the detached child to exit. To prevent the
+         * parent from waiting for a given `subprocess` to exit, use the `subprocess.unref()` method. Doing so will cause the parent's event loop to not
+         * include the child in its reference count, allowing the parent to exit
+         * independently of the child, unless there is an established IPC channel between
+         * the child and the parent.
+         *
+         * ```js
+         * import { spawn } from 'node:child_process';
+         *
+         * const subprocess = spawn(process.argv[0], ['child_program.js'], {
+         *   detached: true,
+         *   stdio: 'ignore',
+         * });
+         *
+         * subprocess.unref();
+         * ```
+         * @since v0.7.10
+         */
+        unref(): void;
+        /**
+         * Calling `subprocess.ref()` after making a call to `subprocess.unref()` will
+         * restore the removed reference count for the child process, forcing the parent
+         * to wait for the child to exit before exiting itself.
+         *
+         * ```js
+         * import { spawn } from 'node:child_process';
+         *
+         * const subprocess = spawn(process.argv[0], ['child_program.js'], {
+         *   detached: true,
+         *   stdio: 'ignore',
+         * });
+         *
+         * subprocess.unref();
+         * subprocess.ref();
+         * ```
+         * @since v0.7.10
+         */
+        ref(): void;
+    }
+    interface ChildProcess extends InternalEventEmitter<ChildProcessEventMap> {}
+    // return this object when stdio option is undefined or not specified
+    interface ChildProcessWithoutNullStreams extends ChildProcess {
+        stdin: Writable;
+        stdout: Readable;
+        stderr: Readable;
+        readonly stdio: [
+            Writable,
+            Readable,
+            Readable,
+            // stderr
+            Readable | Writable | null | undefined,
+            // extra, no modification
+            Readable | Writable | null | undefined, // extra, no modification
+        ];
+    }
+    // return this object when stdio option is a tuple of 3
+    interface ChildProcessByStdio<I extends null | Writable, O extends null | Readable, E extends null | Readable>
+        extends ChildProcess
+    {
+        stdin: I;
+        stdout: O;
+        stderr: E;
+        readonly stdio: [
+            I,
+            O,
+            E,
+            Readable | Writable | null | undefined,
+            // extra, no modification
+            Readable | Writable | null | undefined, // extra, no modification
+        ];
+    }
+    interface Control extends EventEmitter {
+        ref(): void;
+        unref(): void;
+    }
+    interface MessageOptions {
+        keepOpen?: boolean | undefined;
+    }
+    type IOType = "overlapped" | "pipe" | "ignore" | "inherit";
+    type StdioOptions = IOType | Array<IOType | "ipc" | Stream | number | null | undefined>;
+    type SerializationType = "json" | "advanced";
+    interface MessagingOptions extends Abortable {
+        /**
+         * Specify the kind of serialization used for sending messages between processes.
+         * @default 'json'
+         */
+        serialization?: SerializationType | undefined;
+        /**
+         * The signal value to be used when the spawned process will be killed by the abort signal.
+         * @default 'SIGTERM'
+         */
+        killSignal?: NodeJS.Signals | number | undefined;
+        /**
+         * In milliseconds the maximum amount of time the process is allowed to run.
+         */
+        timeout?: number | undefined;
+    }
+    interface ProcessEnvOptions {
+        uid?: number | undefined;
+        gid?: number | undefined;
+        cwd?: string | URL | undefined;
+        env?: NodeJS.ProcessEnv | undefined;
+    }
+    interface CommonOptions extends ProcessEnvOptions {
+        /**
+         * @default false
+         */
+        windowsHide?: boolean | undefined;
+        /**
+         * @default 0
+         */
+        timeout?: number | undefined;
+    }
+    interface CommonSpawnOptions extends CommonOptions, MessagingOptions, Abortable {
+        argv0?: string | undefined;
+        /**
+         * Can be set to 'pipe', 'inherit', 'overlapped', or 'ignore', or an array of these strings.
+         * If passed as an array, the first element is used for `stdin`, the second for
+         * `stdout`, and the third for `stderr`. A fourth element can be used to
+         * specify the `stdio` behavior beyond the standard streams. See
+         * {@link ChildProcess.stdio} for more information.
+         *
+         * @default 'pipe'
+         */
+        stdio?: StdioOptions | undefined;
+        shell?: boolean | string | undefined;
+        windowsVerbatimArguments?: boolean | undefined;
+    }
+    interface SpawnOptions extends CommonSpawnOptions {
+        detached?: boolean | undefined;
+    }
+    interface SpawnOptionsWithoutStdio extends SpawnOptions {
+        stdio?: StdioPipeNamed | StdioPipe[] | undefined;
+    }
+    type StdioNull = "inherit" | "ignore" | Stream;
+    type StdioPipeNamed = "pipe" | "overlapped";
+    type StdioPipe = undefined | null | StdioPipeNamed;
+    interface SpawnOptionsWithStdioTuple<
+        Stdin extends StdioNull | StdioPipe,
+        Stdout extends StdioNull | StdioPipe,
+        Stderr extends StdioNull | StdioPipe,
+    > extends SpawnOptions {
+        stdio: [Stdin, Stdout, Stderr];
+    }
+    /**
+     * The `child_process.spawn()` method spawns a new process using the given `command`, with command-line arguments in `args`. If omitted, `args` defaults
+     * to an empty array.
+     *
+     * **If the `shell` option is enabled, do not pass unsanitized user input to this**
+     * **function. Any input containing shell metacharacters may be used to trigger**
+     * **arbitrary command execution.**
+     *
+     * A third argument may be used to specify additional options, with these defaults:
+     *
+     * ```js
+     * const defaults = {
+     *   cwd: undefined,
+     *   env: process.env,
+     * };
+     * ```
+     *
+     * Use `cwd` to specify the working directory from which the process is spawned.
+     * If not given, the default is to inherit the current working directory. If given,
+     * but the path does not exist, the child process emits an `ENOENT` error
+     * and exits immediately. `ENOENT` is also emitted when the command
+     * does not exist.
+     *
+     * Use `env` to specify environment variables that will be visible to the new
+     * process, the default is `process.env`.
+     *
+     * `undefined` values in `env` will be ignored.
+     *
+     * Example of running `ls -lh /usr`, capturing `stdout`, `stderr`, and the
+     * exit code:
+     *
+     * ```js
+     * import { spawn } from 'node:child_process';
+     * import { once } from 'node:events';
+     * const ls = spawn('ls', ['-lh', '/usr']);
+     *
+     * ls.stdout.on('data', (data) => {
+     *   console.log(`stdout: ${data}`);
+     * });
+     *
+     * ls.stderr.on('data', (data) => {
+     *   console.error(`stderr: ${data}`);
+     * });
+     *
+     * const [code] = await once(ls, 'close');
+     * console.log(`child process exited with code ${code}`);
+     * ```
+     *
+     * Example: A very elaborate way to run `ps ax | grep ssh`
+     *
+     * ```js
+     * import { spawn } from 'node:child_process';
+     * const ps = spawn('ps', ['ax']);
+     * const grep = spawn('grep', ['ssh']);
+     *
+     * ps.stdout.on('data', (data) => {
+     *   grep.stdin.write(data);
+     * });
+     *
+     * ps.stderr.on('data', (data) => {
+     *   console.error(`ps stderr: ${data}`);
+     * });
+     *
+     * ps.on('close', (code) => {
+     *   if (code !== 0) {
+     *     console.log(`ps process exited with code ${code}`);
+     *   }
+     *   grep.stdin.end();
+     * });
+     *
+     * grep.stdout.on('data', (data) => {
+     *   console.log(data.toString());
+     * });
+     *
+     * grep.stderr.on('data', (data) => {
+     *   console.error(`grep stderr: ${data}`);
+     * });
+     *
+     * grep.on('close', (code) => {
+     *   if (code !== 0) {
+     *     console.log(`grep process exited with code ${code}`);
+     *   }
+     * });
+     * ```
+     *
+     * Example of checking for failed `spawn`:
+     *
+     * ```js
+     * import { spawn } from 'node:child_process';
+     * const subprocess = spawn('bad_command');
+     *
+     * subprocess.on('error', (err) => {
+     *   console.error('Failed to start subprocess.');
+     * });
+     * ```
+     *
+     * Certain platforms (macOS, Linux) will use the value of `argv[0]` for the process
+     * title while others (Windows, SunOS) will use `command`.
+     *
+     * Node.js overwrites `argv[0]` with `process.execPath` on startup, so `process.argv[0]` in a Node.js child process will not match the `argv0` parameter passed to `spawn` from the parent. Retrieve
+     * it with the `process.argv0` property instead.
+     *
+     * If the `signal` option is enabled, calling `.abort()` on the corresponding `AbortController` is similar to calling `.kill()` on the child process except
+     * the error passed to the callback will be an `AbortError`:
+     *
+     * ```js
+     * import { spawn } from 'node:child_process';
+     * const controller = new AbortController();
+     * const { signal } = controller;
+     * const grep = spawn('grep', ['ssh'], { signal });
+     * grep.on('error', (err) => {
+     *   // This will be called with err being an AbortError if the controller aborts
+     * });
+     * controller.abort(); // Stops the child process
+     * ```
+     * @since v0.1.90
+     * @param command The command to run.
+     * @param args List of string arguments.
+     */
+    function spawn(command: string, options?: SpawnOptionsWithoutStdio): ChildProcessWithoutNullStreams;
+    function spawn(
+        command: string,
+        options: SpawnOptionsWithStdioTuple<StdioPipe, StdioPipe, StdioPipe>,
+    ): ChildProcessByStdio<Writable, Readable, Readable>;
+    function spawn(
+        command: string,
+        options: SpawnOptionsWithStdioTuple<StdioPipe, StdioPipe, StdioNull>,
+    ): ChildProcessByStdio<Writable, Readable, null>;
+    function spawn(
+        command: string,
+        options: SpawnOptionsWithStdioTuple<StdioPipe, StdioNull, StdioPipe>,
+    ): ChildProcessByStdio<Writable, null, Readable>;
+    function spawn(
+        command: string,
+        options: SpawnOptionsWithStdioTuple<StdioNull, StdioPipe, StdioPipe>,
+    ): ChildProcessByStdio<null, Readable, Readable>;
+    function spawn(
+        command: string,
+        options: SpawnOptionsWithStdioTuple<StdioPipe, StdioNull, StdioNull>,
+    ): ChildProcessByStdio<Writable, null, null>;
+    function spawn(
+        command: string,
+        options: SpawnOptionsWithStdioTuple<StdioNull, StdioPipe, StdioNull>,
+    ): ChildProcessByStdio<null, Readable, null>;
+    function spawn(
+        command: string,
+        options: SpawnOptionsWithStdioTuple<StdioNull, StdioNull, StdioPipe>,
+    ): ChildProcessByStdio<null, null, Readable>;
+    function spawn(
+        command: string,
+        options: SpawnOptionsWithStdioTuple<StdioNull, StdioNull, StdioNull>,
+    ): ChildProcessByStdio<null, null, null>;
+    function spawn(command: string, options: SpawnOptions): ChildProcess;
+    // overloads of spawn with 'args'
+    function spawn(
+        command: string,
+        args?: readonly string[],
+        options?: SpawnOptionsWithoutStdio,
+    ): ChildProcessWithoutNullStreams;
+    function spawn(
+        command: string,
+        args: readonly string[],
+        options: SpawnOptionsWithStdioTuple<StdioPipe, StdioPipe, StdioPipe>,
+    ): ChildProcessByStdio<Writable, Readable, Readable>;
+    function spawn(
+        command: string,
+        args: readonly string[],
+        options: SpawnOptionsWithStdioTuple<StdioPipe, StdioPipe, StdioNull>,
+    ): ChildProcessByStdio<Writable, Readable, null>;
+    function spawn(
+        command: string,
+        args: readonly string[],
+        options: SpawnOptionsWithStdioTuple<StdioPipe, StdioNull, StdioPipe>,
+    ): ChildProcessByStdio<Writable, null, Readable>;
+    function spawn(
+        command: string,
+        args: readonly string[],
+        options: SpawnOptionsWithStdioTuple<StdioNull, StdioPipe, StdioPipe>,
+    ): ChildProcessByStdio<null, Readable, Readable>;
+    function spawn(
+        command: string,
+        args: readonly string[],
+        options: SpawnOptionsWithStdioTuple<StdioPipe, StdioNull, StdioNull>,
+    ): ChildProcessByStdio<Writable, null, null>;
+    function spawn(
+        command: string,
+        args: readonly string[],
+        options: SpawnOptionsWithStdioTuple<StdioNull, StdioPipe, StdioNull>,
+    ): ChildProcessByStdio<null, Readable, null>;
+    function spawn(
+        command: string,
+        args: readonly string[],
+        options: SpawnOptionsWithStdioTuple<StdioNull, StdioNull, StdioPipe>,
+    ): ChildProcessByStdio<null, null, Readable>;
+    function spawn(
+        command: string,
+        args: readonly string[],
+        options: SpawnOptionsWithStdioTuple<StdioNull, StdioNull, StdioNull>,
+    ): ChildProcessByStdio<null, null, null>;
+    function spawn(command: string, args: readonly string[], options: SpawnOptions): ChildProcess;
+    interface ExecOptions extends CommonOptions {
+        shell?: string | undefined;
+        signal?: AbortSignal | undefined;
+        maxBuffer?: number | undefined;
+        killSignal?: NodeJS.Signals | number | undefined;
+        encoding?: string | null | undefined;
+    }
+    interface ExecOptionsWithStringEncoding extends ExecOptions {
+        encoding?: BufferEncoding | undefined;
+    }
+    interface ExecOptionsWithBufferEncoding extends ExecOptions {
+        encoding: "buffer" | null; // specify `null`.
+    }
+    // TODO: Just Plain Wrong™ (see also nodejs/node#57392)
+    interface ExecException extends Error {
+        cmd?: string;
+        killed?: boolean;
+        code?: number;
+        signal?: NodeJS.Signals;
+        stdout?: string;
+        stderr?: string;
+    }
+    /**
+     * Spawns a shell then executes the `command` within that shell, buffering any
+     * generated output. The `command` string passed to the exec function is processed
+     * directly by the shell and special characters (vary based on [shell](https://en.wikipedia.org/wiki/List_of_command-line_interpreters))
+     * need to be dealt with accordingly:
+     *
+     * ```js
+     * import { exec } from 'node:child_process';
+     *
+     * exec('"/path/to/test file/test.sh" arg1 arg2');
+     * // Double quotes are used so that the space in the path is not interpreted as
+     * // a delimiter of multiple arguments.
+     *
+     * exec('echo "The \\$HOME variable is $HOME"');
+     * // The $HOME variable is escaped in the first instance, but not in the second.
+     * ```
+     *
+     * **Never pass unsanitized user input to this function. Any input containing shell**
+     * **metacharacters may be used to trigger arbitrary command execution.**
+     *
+     * If a `callback` function is provided, it is called with the arguments `(error, stdout, stderr)`. On success, `error` will be `null`. On error, `error` will be an instance of `Error`. The
+     * `error.code` property will be
+     * the exit code of the process. By convention, any exit code other than `0` indicates an error. `error.signal` will be the signal that terminated the
+     * process.
+     *
+     * The `stdout` and `stderr` arguments passed to the callback will contain the
+     * stdout and stderr output of the child process. By default, Node.js will decode
+     * the output as UTF-8 and pass strings to the callback. The `encoding` option
+     * can be used to specify the character encoding used to decode the stdout and
+     * stderr output. If `encoding` is `'buffer'`, or an unrecognized character
+     * encoding, `Buffer` objects will be passed to the callback instead.
+     *
+     * ```js
+     * import { exec } from 'node:child_process';
+     * exec('cat *.js missing_file | wc -l', (error, stdout, stderr) => {
+     *   if (error) {
+     *     console.error(`exec error: ${error}`);
+     *     return;
+     *   }
+     *   console.log(`stdout: ${stdout}`);
+     *   console.error(`stderr: ${stderr}`);
+     * });
+     * ```
+     *
+     * If `timeout` is greater than `0`, the parent will send the signal
+     * identified by the `killSignal` property (the default is `'SIGTERM'`) if the
+     * child runs longer than `timeout` milliseconds.
+     *
+     * Unlike the [`exec(3)`](http://man7.org/linux/man-pages/man3/exec.3.html) POSIX system call, `child_process.exec()` does not replace
+     * the existing process and uses a shell to execute the command.
+     *
+     * If this method is invoked as its `util.promisify()` ed version, it returns
+     * a `Promise` for an `Object` with `stdout` and `stderr` properties. The returned `ChildProcess` instance is attached to the `Promise` as a `child` property. In
+     * case of an error (including any error resulting in an exit code other than 0), a
+     * rejected promise is returned, with the same `error` object given in the
+     * callback, but with two additional properties `stdout` and `stderr`.
+     *
+     * ```js
+     * import util from 'node:util';
+     * import child_process from 'node:child_process';
+     * const exec = util.promisify(child_process.exec);
+     *
+     * async function lsExample() {
+     *   const { stdout, stderr } = await exec('ls');
+     *   console.log('stdout:', stdout);
+     *   console.error('stderr:', stderr);
+     * }
+     * lsExample();
+     * ```
+     *
+     * If the `signal` option is enabled, calling `.abort()` on the corresponding `AbortController` is similar to calling `.kill()` on the child process except
+     * the error passed to the callback will be an `AbortError`:
+     *
+     * ```js
+     * import { exec } from 'node:child_process';
+     * const controller = new AbortController();
+     * const { signal } = controller;
+     * const child = exec('grep ssh', { signal }, (error) => {
+     *   console.error(error); // an AbortError
+     * });
+     * controller.abort();
+     * ```
+     * @since v0.1.90
+     * @param command The command to run, with space-separated arguments.
+     * @param callback called with the output when process terminates.
+     */
+    function exec(
+        command: string,
+        callback?: (error: ExecException | null, stdout: string, stderr: string) => void,
+    ): ChildProcess;
+    // `options` with `"buffer"` or `null` for `encoding` means stdout/stderr are definitely `Buffer`.
+    function exec(
+        command: string,
+        options: ExecOptionsWithBufferEncoding,
+        callback?: (error: ExecException | null, stdout: NonSharedBuffer, stderr: NonSharedBuffer) => void,
+    ): ChildProcess;
+    // `options` with well-known or absent `encoding` means stdout/stderr are definitely `string`.
+    function exec(
+        command: string,
+        options: ExecOptionsWithStringEncoding,
+        callback?: (error: ExecException | null, stdout: string, stderr: string) => void,
+    ): ChildProcess;
+    // fallback if nothing else matches. Worst case is always `string | Buffer`.
+    function exec(
+        command: string,
+        options: ExecOptions | undefined | null,
+        callback?: (
+            error: ExecException | null,
+            stdout: string | NonSharedBuffer,
+            stderr: string | NonSharedBuffer,
+        ) => void,
+    ): ChildProcess;
+    interface PromiseWithChild<T> extends Promise<T> {
+        child: ChildProcess;
+    }
+    namespace exec {
+        function __promisify__(command: string): PromiseWithChild<{
+            stdout: string;
+            stderr: string;
+        }>;
+        function __promisify__(
+            command: string,
+            options: ExecOptionsWithBufferEncoding,
+        ): PromiseWithChild<{
+            stdout: NonSharedBuffer;
+            stderr: NonSharedBuffer;
+        }>;
+        function __promisify__(
+            command: string,
+            options: ExecOptionsWithStringEncoding,
+        ): PromiseWithChild<{
+            stdout: string;
+            stderr: string;
+        }>;
+        function __promisify__(
+            command: string,
+            options: ExecOptions | undefined | null,
+        ): PromiseWithChild<{
+            stdout: string | NonSharedBuffer;
+            stderr: string | NonSharedBuffer;
+        }>;
+    }
+    interface ExecFileOptions extends CommonOptions, Abortable {
+        maxBuffer?: number | undefined;
+        killSignal?: NodeJS.Signals | number | undefined;
+        windowsVerbatimArguments?: boolean | undefined;
+        shell?: boolean | string | undefined;
+        signal?: AbortSignal | undefined;
+        encoding?: string | null | undefined;
+    }
+    interface ExecFileOptionsWithStringEncoding extends ExecFileOptions {
+        encoding?: BufferEncoding | undefined;
+    }
+    interface ExecFileOptionsWithBufferEncoding extends ExecFileOptions {
+        encoding: "buffer" | null;
+    }
+    /** @deprecated Use `ExecFileOptions` instead. */
+    interface ExecFileOptionsWithOtherEncoding extends ExecFileOptions {}
+    // TODO: execFile exceptions can take many forms... this accurately describes none of them
+    type ExecFileException =
+        & Omit<ExecException, "code">
+        & Omit<NodeJS.ErrnoException, "code">
+        & { code?: string | number | null };
+    /**
+     * The `child_process.execFile()` function is similar to {@link exec} except that it does not spawn a shell by default. Rather, the specified
+     * executable `file` is spawned directly as a new process making it slightly more
+     * efficient than {@link exec}.
+     *
+     * The same options as {@link exec} are supported. Since a shell is
+     * not spawned, behaviors such as I/O redirection and file globbing are not
+     * supported.
+     *
+     * ```js
+     * import { execFile } from 'node:child_process';
+     * const child = execFile('node', ['--version'], (error, stdout, stderr) => {
+     *   if (error) {
+     *     throw error;
+     *   }
+     *   console.log(stdout);
+     * });
+     * ```
+     *
+     * The `stdout` and `stderr` arguments passed to the callback will contain the
+     * stdout and stderr output of the child process. By default, Node.js will decode
+     * the output as UTF-8 and pass strings to the callback. The `encoding` option
+     * can be used to specify the character encoding used to decode the stdout and
+     * stderr output. If `encoding` is `'buffer'`, or an unrecognized character
+     * encoding, `Buffer` objects will be passed to the callback instead.
+     *
+     * If this method is invoked as its `util.promisify()` ed version, it returns
+     * a `Promise` for an `Object` with `stdout` and `stderr` properties. The returned `ChildProcess` instance is attached to the `Promise` as a `child` property. In
+     * case of an error (including any error resulting in an exit code other than 0), a
+     * rejected promise is returned, with the same `error` object given in the
+     * callback, but with two additional properties `stdout` and `stderr`.
+     *
+     * ```js
+     * import util from 'node:util';
+     * import child_process from 'node:child_process';
+     * const execFile = util.promisify(child_process.execFile);
+     * async function getVersion() {
+     *   const { stdout } = await execFile('node', ['--version']);
+     *   console.log(stdout);
+     * }
+     * getVersion();
+     * ```
+     *
+     * **If the `shell` option is enabled, do not pass unsanitized user input to this**
+     * **function. Any input containing shell metacharacters may be used to trigger**
+     * **arbitrary command execution.**
+     *
+     * If the `signal` option is enabled, calling `.abort()` on the corresponding `AbortController` is similar to calling `.kill()` on the child process except
+     * the error passed to the callback will be an `AbortError`:
+     *
+     * ```js
+     * import { execFile } from 'node:child_process';
+     * const controller = new AbortController();
+     * const { signal } = controller;
+     * const child = execFile('node', ['--version'], { signal }, (error) => {
+     *   console.error(error); // an AbortError
+     * });
+     * controller.abort();
+     * ```
+     * @since v0.1.91
+     * @param file The name or path of the executable file to run.
+     * @param args List of string arguments.
+     * @param callback Called with the output when process terminates.
+     */
+    // no `options` definitely means stdout/stderr are `string`.
+    function execFile(
+        file: string,
+        callback?: (error: ExecFileException | null, stdout: string, stderr: string) => void,
+    ): ChildProcess;
+    function execFile(
+        file: string,
+        args: readonly string[] | undefined | null,
+        callback?: (error: ExecFileException | null, stdout: string, stderr: string) => void,
+    ): ChildProcess;
+    // `options` with `"buffer"` or `null` for `encoding` means stdout/stderr are definitely `Buffer`.
+    function execFile(
+        file: string,
+        options: ExecFileOptionsWithBufferEncoding,
+        callback?: (error: ExecFileException | null, stdout: NonSharedBuffer, stderr: NonSharedBuffer) => void,
+    ): ChildProcess;
+    function execFile(
+        file: string,
+        args: readonly string[] | undefined | null,
+        options: ExecFileOptionsWithBufferEncoding,
+        callback?: (error: ExecFileException | null, stdout: NonSharedBuffer, stderr: NonSharedBuffer) => void,
+    ): ChildProcess;
+    // `options` with well-known or absent `encoding` means stdout/stderr are definitely `string`.
+    function execFile(
+        file: string,
+        options: ExecFileOptionsWithStringEncoding,
+        callback?: (error: ExecFileException | null, stdout: string, stderr: string) => void,
+    ): ChildProcess;
+    function execFile(
+        file: string,
+        args: readonly string[] | undefined | null,
+        options: ExecFileOptionsWithStringEncoding,
+        callback?: (error: ExecFileException | null, stdout: string, stderr: string) => void,
+    ): ChildProcess;
+    // fallback if nothing else matches. Worst case is always `string | Buffer`.
+    function execFile(
+        file: string,
+        options: ExecFileOptions | undefined | null,
+        callback:
+            | ((
+                error: ExecFileException | null,
+                stdout: string | NonSharedBuffer,
+                stderr: string | NonSharedBuffer,
+            ) => void)
+            | undefined
+            | null,
+    ): ChildProcess;
+    function execFile(
+        file: string,
+        args: readonly string[] | undefined | null,
+        options: ExecFileOptions | undefined | null,
+        callback:
+            | ((
+                error: ExecFileException | null,
+                stdout: string | NonSharedBuffer,
+                stderr: string | NonSharedBuffer,
+            ) => void)
+            | undefined
+            | null,
+    ): ChildProcess;
+    namespace execFile {
+        function __promisify__(file: string): PromiseWithChild<{
+            stdout: string;
+            stderr: string;
+        }>;
+        function __promisify__(
+            file: string,
+            args: readonly string[] | undefined | null,
+        ): PromiseWithChild<{
+            stdout: string;
+            stderr: string;
+        }>;
+        function __promisify__(
+            file: string,
+            options: ExecFileOptionsWithBufferEncoding,
+        ): PromiseWithChild<{
+            stdout: NonSharedBuffer;
+            stderr: NonSharedBuffer;
+        }>;
+        function __promisify__(
+            file: string,
+            args: readonly string[] | undefined | null,
+            options: ExecFileOptionsWithBufferEncoding,
+        ): PromiseWithChild<{
+            stdout: NonSharedBuffer;
+            stderr: NonSharedBuffer;
+        }>;
+        function __promisify__(
+            file: string,
+            options: ExecFileOptionsWithStringEncoding,
+        ): PromiseWithChild<{
+            stdout: string;
+            stderr: string;
+        }>;
+        function __promisify__(
+            file: string,
+            args: readonly string[] | undefined | null,
+            options: ExecFileOptionsWithStringEncoding,
+        ): PromiseWithChild<{
+            stdout: string;
+            stderr: string;
+        }>;
+        function __promisify__(
+            file: string,
+            options: ExecFileOptions | undefined | null,
+        ): PromiseWithChild<{
+            stdout: string | NonSharedBuffer;
+            stderr: string | NonSharedBuffer;
+        }>;
+        function __promisify__(
+            file: string,
+            args: readonly string[] | undefined | null,
+            options: ExecFileOptions | undefined | null,
+        ): PromiseWithChild<{
+            stdout: string | NonSharedBuffer;
+            stderr: string | NonSharedBuffer;
+        }>;
+    }
+    interface ForkOptions extends ProcessEnvOptions, MessagingOptions, Abortable {
+        execPath?: string | undefined;
+        execArgv?: string[] | undefined;
+        silent?: boolean | undefined;
+        /**
+         * Can be set to 'pipe', 'inherit', 'overlapped', or 'ignore', or an array of these strings.
+         * If passed as an array, the first element is used for `stdin`, the second for
+         * `stdout`, and the third for `stderr`. A fourth element can be used to
+         * specify the `stdio` behavior beyond the standard streams. See
+         * {@link ChildProcess.stdio} for more information.
+         *
+         * @default 'pipe'
+         */
+        stdio?: StdioOptions | undefined;
+        detached?: boolean | undefined;
+        windowsVerbatimArguments?: boolean | undefined;
+    }
+    /**
+     * The `child_process.fork()` method is a special case of {@link spawn} used specifically to spawn new Node.js processes.
+     * Like {@link spawn}, a `ChildProcess` object is returned. The
+     * returned `ChildProcess` will have an additional communication channel
+     * built-in that allows messages to be passed back and forth between the parent and
+     * child. See `subprocess.send()` for details.
+     *
+     * Keep in mind that spawned Node.js child processes are
+     * independent of the parent with exception of the IPC communication channel
+     * that is established between the two. Each process has its own memory, with
+     * their own V8 instances. Because of the additional resource allocations
+     * required, spawning a large number of child Node.js processes is not
+     * recommended.
+     *
+     * By default, `child_process.fork()` will spawn new Node.js instances using the `process.execPath` of the parent process. The `execPath` property in the `options` object allows for an alternative
+     * execution path to be used.
+     *
+     * Node.js processes launched with a custom `execPath` will communicate with the
+     * parent process using the file descriptor (fd) identified using the
+     * environment variable `NODE_CHANNEL_FD` on the child process.
+     *
+     * Unlike the [`fork(2)`](http://man7.org/linux/man-pages/man2/fork.2.html) POSIX system call, `child_process.fork()` does not clone the
+     * current process.
+     *
+     * The `shell` option available in {@link spawn} is not supported by `child_process.fork()` and will be ignored if set.
+     *
+     * If the `signal` option is enabled, calling `.abort()` on the corresponding `AbortController` is similar to calling `.kill()` on the child process except
+     * the error passed to the callback will be an `AbortError`:
+     *
+     * ```js
+     * if (process.argv[2] === 'child') {
+     *   setTimeout(() => {
+     *     console.log(`Hello from ${process.argv[2]}!`);
+     *   }, 1_000);
+     * } else {
+     *   import { fork } from 'node:child_process';
+     *   const controller = new AbortController();
+     *   const { signal } = controller;
+     *   const child = fork(__filename, ['child'], { signal });
+     *   child.on('error', (err) => {
+     *     // This will be called with err being an AbortError if the controller aborts
+     *   });
+     *   controller.abort(); // Stops the child process
+     * }
+     * ```
+     * @since v0.5.0
+     * @param modulePath The module to run in the child.
+     * @param args List of string arguments.
+     */
+    function fork(modulePath: string | URL, options?: ForkOptions): ChildProcess;
+    function fork(modulePath: string | URL, args?: readonly string[], options?: ForkOptions): ChildProcess;
+    interface SpawnSyncOptions extends CommonSpawnOptions {
+        input?: string | NodeJS.ArrayBufferView | undefined;
+        maxBuffer?: number | undefined;
+        encoding?: BufferEncoding | "buffer" | null | undefined;
+    }
+    interface SpawnSyncOptionsWithStringEncoding extends SpawnSyncOptions {
+        encoding: BufferEncoding;
+    }
+    interface SpawnSyncOptionsWithBufferEncoding extends SpawnSyncOptions {
+        encoding?: "buffer" | null | undefined;
+    }
+    interface SpawnSyncReturns<T> {
+        pid: number;
+        output: Array<T | null>;
+        stdout: T;
+        stderr: T;
+        status: number | null;
+        signal: NodeJS.Signals | null;
+        error?: Error;
+    }
+    /**
+     * The `child_process.spawnSync()` method is generally identical to {@link spawn} with the exception that the function will not return
+     * until the child process has fully closed. When a timeout has been encountered
+     * and `killSignal` is sent, the method won't return until the process has
+     * completely exited. If the process intercepts and handles the `SIGTERM` signal
+     * and doesn't exit, the parent process will wait until the child process has
+     * exited.
+     *
+     * **If the `shell` option is enabled, do not pass unsanitized user input to this**
+     * **function. Any input containing shell metacharacters may be used to trigger**
+     * **arbitrary command execution.**
+     * @since v0.11.12
+     * @param command The command to run.
+     * @param args List of string arguments.
+     */
+    function spawnSync(command: string): SpawnSyncReturns<NonSharedBuffer>;
+    function spawnSync(command: string, options: SpawnSyncOptionsWithStringEncoding): SpawnSyncReturns<string>;
+    function spawnSync(command: string, options: SpawnSyncOptionsWithBufferEncoding): SpawnSyncReturns<NonSharedBuffer>;
+    function spawnSync(command: string, options?: SpawnSyncOptions): SpawnSyncReturns<string | NonSharedBuffer>;
+    function spawnSync(command: string, args: readonly string[]): SpawnSyncReturns<NonSharedBuffer>;
+    function spawnSync(
+        command: string,
+        args: readonly string[],
+        options: SpawnSyncOptionsWithStringEncoding,
+    ): SpawnSyncReturns<string>;
+    function spawnSync(
+        command: string,
+        args: readonly string[],
+        options: SpawnSyncOptionsWithBufferEncoding,
+    ): SpawnSyncReturns<NonSharedBuffer>;
+    function spawnSync(
+        command: string,
+        args?: readonly string[],
+        options?: SpawnSyncOptions,
+    ): SpawnSyncReturns<string | NonSharedBuffer>;
+    interface CommonExecOptions extends CommonOptions {
+        input?: string | NodeJS.ArrayBufferView | undefined;
+        /**
+         * Can be set to 'pipe', 'inherit, or 'ignore', or an array of these strings.
+         * If passed as an array, the first element is used for `stdin`, the second for
+         * `stdout`, and the third for `stderr`. A fourth element can be used to
+         * specify the `stdio` behavior beyond the standard streams. See
+         * {@link ChildProcess.stdio} for more information.
+         *
+         * @default 'pipe'
+         */
+        stdio?: StdioOptions | undefined;
+        killSignal?: NodeJS.Signals | number | undefined;
+        maxBuffer?: number | undefined;
+        encoding?: BufferEncoding | "buffer" | null | undefined;
+    }
+    interface ExecSyncOptions extends CommonExecOptions {
+        shell?: string | undefined;
+    }
+    interface ExecSyncOptionsWithStringEncoding extends ExecSyncOptions {
+        encoding: BufferEncoding;
+    }
+    interface ExecSyncOptionsWithBufferEncoding extends ExecSyncOptions {
+        encoding?: "buffer" | null | undefined;
+    }
+    /**
+     * The `child_process.execSync()` method is generally identical to {@link exec} with the exception that the method will not return
+     * until the child process has fully closed. When a timeout has been encountered
+     * and `killSignal` is sent, the method won't return until the process has
+     * completely exited. If the child process intercepts and handles the `SIGTERM` signal and doesn't exit, the parent process will wait until the child process
+     * has exited.
+     *
+     * If the process times out or has a non-zero exit code, this method will throw.
+     * The `Error` object will contain the entire result from {@link spawnSync}.
+     *
+     * **Never pass unsanitized user input to this function. Any input containing shell**
+     * **metacharacters may be used to trigger arbitrary command execution.**
+     * @since v0.11.12
+     * @param command The command to run.
+     * @return The stdout from the command.
+     */
+    function execSync(command: string): NonSharedBuffer;
+    function execSync(command: string, options: ExecSyncOptionsWithStringEncoding): string;
+    function execSync(command: string, options: ExecSyncOptionsWithBufferEncoding): NonSharedBuffer;
+    function execSync(command: string, options?: ExecSyncOptions): string | NonSharedBuffer;
+    interface ExecFileSyncOptions extends CommonExecOptions {
+        shell?: boolean | string | undefined;
+    }
+    interface ExecFileSyncOptionsWithStringEncoding extends ExecFileSyncOptions {
+        encoding: BufferEncoding;
+    }
+    interface ExecFileSyncOptionsWithBufferEncoding extends ExecFileSyncOptions {
+        encoding?: "buffer" | null | undefined; // specify `null`.
+    }
+    /**
+     * The `child_process.execFileSync()` method is generally identical to {@link execFile} with the exception that the method will not
+     * return until the child process has fully closed. When a timeout has been
+     * encountered and `killSignal` is sent, the method won't return until the process
+     * has completely exited.
+     *
+     * If the child process intercepts and handles the `SIGTERM` signal and
+     * does not exit, the parent process will still wait until the child process has
+     * exited.
+     *
+     * If the process times out or has a non-zero exit code, this method will throw an `Error` that will include the full result of the underlying {@link spawnSync}.
+     *
+     * **If the `shell` option is enabled, do not pass unsanitized user input to this**
+     * **function. Any input containing shell metacharacters may be used to trigger**
+     * **arbitrary command execution.**
+     * @since v0.11.12
+     * @param file The name or path of the executable file to run.
+     * @param args List of string arguments.
+     * @return The stdout from the command.
+     */
+    function execFileSync(file: string): NonSharedBuffer;
+    function execFileSync(file: string, options: ExecFileSyncOptionsWithStringEncoding): string;
+    function execFileSync(file: string, options: ExecFileSyncOptionsWithBufferEncoding): NonSharedBuffer;
+    function execFileSync(file: string, options?: ExecFileSyncOptions): string | NonSharedBuffer;
+    function execFileSync(file: string, args: readonly string[]): NonSharedBuffer;
+    function execFileSync(
+        file: string,
+        args: readonly string[],
+        options: ExecFileSyncOptionsWithStringEncoding,
+    ): string;
+    function execFileSync(
+        file: string,
+        args: readonly string[],
+        options: ExecFileSyncOptionsWithBufferEncoding,
+    ): NonSharedBuffer;
+    function execFileSync(
+        file: string,
+        args?: readonly string[],
+        options?: ExecFileSyncOptions,
+    ): string | NonSharedBuffer;
+}
+declare module "child_process" {
+    export * from "node:child_process";
+}
diff --git a/mqtt-backend/node_modules/@types/node/cluster.d.ts b/mqtt-backend/node_modules/@types/node/cluster.d.ts
new file mode 100644
index 0000000..80f55ae
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/cluster.d.ts
@@ -0,0 +1,432 @@
+declare module "node:cluster" {
+    import * as child_process from "node:child_process";
+    import { EventEmitter, InternalEventEmitter } from "node:events";
+    class Worker implements EventEmitter {
+        constructor(options?: cluster.WorkerOptions);
+        /**
+         * Each new worker is given its own unique id, this id is stored in the `id`.
+         *
+         * While a worker is alive, this is the key that indexes it in `cluster.workers`.
+         * @since v0.8.0
+         */
+        id: number;
+        /**
+         * All workers are created using [`child_process.fork()`](https://nodejs.org/docs/latest-v25.x/api/child_process.html#child_processforkmodulepath-args-options), the returned object
+         * from this function is stored as `.process`. In a worker, the global `process` is stored.
+         *
+         * See: [Child Process module](https://nodejs.org/docs/latest-v25.x/api/child_process.html#child_processforkmodulepath-args-options).
+         *
+         * Workers will call `process.exit(0)` if the `'disconnect'` event occurs
+         * on `process` and `.exitedAfterDisconnect` is not `true`. This protects against
+         * accidental disconnection.
+         * @since v0.7.0
+         */
+        process: child_process.ChildProcess;
+        /**
+         * Send a message to a worker or primary, optionally with a handle.
+         *
+         * In the primary, this sends a message to a specific worker. It is identical to [`ChildProcess.send()`](https://nodejs.org/docs/latest-v25.x/api/child_process.html#subprocesssendmessage-sendhandle-options-callback).
+         *
+         * In a worker, this sends a message to the primary. It is identical to `process.send()`.
+         *
+         * This example will echo back all messages from the primary:
+         *
+         * ```js
+         * if (cluster.isPrimary) {
+         *   const worker = cluster.fork();
+         *   worker.send('hi there');
+         *
+         * } else if (cluster.isWorker) {
+         *   process.on('message', (msg) => {
+         *     process.send(msg);
+         *   });
+         * }
+         * ```
+         * @since v0.7.0
+         * @param options The `options` argument, if present, is an object used to parameterize the sending of certain types of handles.
+         */
+        send(message: child_process.Serializable, callback?: (error: Error | null) => void): boolean;
+        send(
+            message: child_process.Serializable,
+            sendHandle: child_process.SendHandle,
+            callback?: (error: Error | null) => void,
+        ): boolean;
+        send(
+            message: child_process.Serializable,
+            sendHandle: child_process.SendHandle,
+            options?: child_process.MessageOptions,
+            callback?: (error: Error | null) => void,
+        ): boolean;
+        /**
+         * This function will kill the worker. In the primary worker, it does this by
+         * disconnecting the `worker.process`, and once disconnected, killing with `signal`. In the worker, it does it by killing the process with `signal`.
+         *
+         * The `kill()` function kills the worker process without waiting for a graceful
+         * disconnect, it has the same behavior as `worker.process.kill()`.
+         *
+         * This method is aliased as `worker.destroy()` for backwards compatibility.
+         *
+         * In a worker, `process.kill()` exists, but it is not this function;
+         * it is [`kill()`](https://nodejs.org/docs/latest-v25.x/api/process.html#processkillpid-signal).
+         * @since v0.9.12
+         * @param [signal='SIGTERM'] Name of the kill signal to send to the worker process.
+         */
+        kill(signal?: string): void;
+        destroy(signal?: string): void;
+        /**
+         * In a worker, this function will close all servers, wait for the `'close'` event
+         * on those servers, and then disconnect the IPC channel.
+         *
+         * In the primary, an internal message is sent to the worker causing it to call `.disconnect()` on itself.
+         *
+         * Causes `.exitedAfterDisconnect` to be set.
+         *
+         * After a server is closed, it will no longer accept new connections,
+         * but connections may be accepted by any other listening worker. Existing
+         * connections will be allowed to close as usual. When no more connections exist,
+         * see `server.close()`, the IPC channel to the worker will close allowing it
+         * to die gracefully.
+         *
+         * The above applies _only_ to server connections, client connections are not
+         * automatically closed by workers, and disconnect does not wait for them to close
+         * before exiting.
+         *
+         * In a worker, `process.disconnect` exists, but it is not this function;
+         * it is `disconnect()`.
+         *
+         * Because long living server connections may block workers from disconnecting, it
+         * may be useful to send a message, so application specific actions may be taken to
+         * close them. It also may be useful to implement a timeout, killing a worker if
+         * the `'disconnect'` event has not been emitted after some time.
+         *
+         * ```js
+         * import net from 'node:net';
+         *
+         * if (cluster.isPrimary) {
+         *   const worker = cluster.fork();
+         *   let timeout;
+         *
+         *   worker.on('listening', (address) => {
+         *     worker.send('shutdown');
+         *     worker.disconnect();
+         *     timeout = setTimeout(() => {
+         *       worker.kill();
+         *     }, 2000);
+         *   });
+         *
+         *   worker.on('disconnect', () => {
+         *     clearTimeout(timeout);
+         *   });
+         *
+         * } else if (cluster.isWorker) {
+         *   const server = net.createServer((socket) => {
+         *     // Connections never end
+         *   });
+         *
+         *   server.listen(8000);
+         *
+         *   process.on('message', (msg) => {
+         *     if (msg === 'shutdown') {
+         *       // Initiate graceful close of any connections to server
+         *     }
+         *   });
+         * }
+         * ```
+         * @since v0.7.7
+         * @return A reference to `worker`.
+         */
+        disconnect(): this;
+        /**
+         * This function returns `true` if the worker is connected to its primary via its
+         * IPC channel, `false` otherwise. A worker is connected to its primary after it
+         * has been created. It is disconnected after the `'disconnect'` event is emitted.
+         * @since v0.11.14
+         */
+        isConnected(): boolean;
+        /**
+         * This function returns `true` if the worker's process has terminated (either
+         * because of exiting or being signaled). Otherwise, it returns `false`.
+         *
+         * ```js
+         * import cluster from 'node:cluster';
+         * import http from 'node:http';
+         * import { availableParallelism } from 'node:os';
+         * import process from 'node:process';
+         *
+         * const numCPUs = availableParallelism();
+         *
+         * if (cluster.isPrimary) {
+         *   console.log(`Primary ${process.pid} is running`);
+         *
+         *   // Fork workers.
+         *   for (let i = 0; i < numCPUs; i++) {
+         *     cluster.fork();
+         *   }
+         *
+         *   cluster.on('fork', (worker) => {
+         *     console.log('worker is dead:', worker.isDead());
+         *   });
+         *
+         *   cluster.on('exit', (worker, code, signal) => {
+         *     console.log('worker is dead:', worker.isDead());
+         *   });
+         * } else {
+         *   // Workers can share any TCP connection. In this case, it is an HTTP server.
+         *   http.createServer((req, res) => {
+         *     res.writeHead(200);
+         *     res.end(`Current process\n ${process.pid}`);
+         *     process.kill(process.pid);
+         *   }).listen(8000);
+         * }
+         * ```
+         * @since v0.11.14
+         */
+        isDead(): boolean;
+        /**
+         * This property is `true` if the worker exited due to `.disconnect()`.
+         * If the worker exited any other way, it is `false`. If the
+         * worker has not exited, it is `undefined`.
+         *
+         * The boolean `worker.exitedAfterDisconnect` allows distinguishing between
+         * voluntary and accidental exit, the primary may choose not to respawn a worker
+         * based on this value.
+         *
+         * ```js
+         * cluster.on('exit', (worker, code, signal) => {
+         *   if (worker.exitedAfterDisconnect === true) {
+         *     console.log('Oh, it was just voluntary – no need to worry');
+         *   }
+         * });
+         *
+         * // kill worker
+         * worker.kill();
+         * ```
+         * @since v6.0.0
+         */
+        exitedAfterDisconnect: boolean;
+    }
+    interface Worker extends InternalEventEmitter<cluster.WorkerEventMap> {}
+    type _Worker = Worker;
+    namespace cluster {
+        interface Worker extends _Worker {}
+        interface WorkerOptions {
+            id?: number | undefined;
+            process?: child_process.ChildProcess | undefined;
+            state?: string | undefined;
+        }
+        interface WorkerEventMap {
+            "disconnect": [];
+            "error": [error: Error];
+            "exit": [code: number, signal: string];
+            "listening": [address: Address];
+            "message": [message: any, handle: child_process.SendHandle];
+            "online": [];
+        }
+        interface ClusterSettings {
+            /**
+             * List of string arguments passed to the Node.js executable.
+             * @default process.execArgv
+             */
+            execArgv?: string[] | undefined;
+            /**
+             * File path to worker file.
+             * @default process.argv[1]
+             */
+            exec?: string | undefined;
+            /**
+             * String arguments passed to worker.
+             * @default process.argv.slice(2)
+             */
+            args?: readonly string[] | undefined;
+            /**
+             * Whether or not to send output to parent's stdio.
+             * @default false
+             */
+            silent?: boolean | undefined;
+            /**
+             * Configures the stdio of forked processes. Because the cluster module relies on IPC to function, this configuration must
+             * contain an `'ipc'` entry. When this option is provided, it overrides `silent`. See [`child_prcess.spawn()`](https://nodejs.org/docs/latest-v25.x/api/child_process.html#child_processspawncommand-args-options)'s
+             * [`stdio`](https://nodejs.org/docs/latest-v25.x/api/child_process.html#optionsstdio).
+             */
+            stdio?: any[] | undefined;
+            /**
+             * Sets the user identity of the process. (See [`setuid(2)`](https://man7.org/linux/man-pages/man2/setuid.2.html).)
+             */
+            uid?: number | undefined;
+            /**
+             * Sets the group identity of the process. (See [`setgid(2)`](https://man7.org/linux/man-pages/man2/setgid.2.html).)
+             */
+            gid?: number | undefined;
+            /**
+             * Sets inspector port of worker. This can be a number, or a function that takes no arguments and returns a number.
+             * By default each worker gets its own port, incremented from the primary's `process.debugPort`.
+             */
+            inspectPort?: number | (() => number) | undefined;
+            /**
+             * Specify the kind of serialization used for sending messages between processes. Possible values are `'json'` and `'advanced'`.
+             * See [Advanced serialization for `child_process`](https://nodejs.org/docs/latest-v25.x/api/child_process.html#advanced-serialization) for more details.
+             * @default false
+             */
+            serialization?: "json" | "advanced" | undefined;
+            /**
+             * Current working directory of the worker process.
+             * @default undefined (inherits from parent process)
+             */
+            cwd?: string | undefined;
+            /**
+             * Hide the forked processes console window that would normally be created on Windows systems.
+             * @default false
+             */
+            windowsHide?: boolean | undefined;
+        }
+        interface Address {
+            address: string;
+            port: number;
+            /**
+             * The `addressType` is one of:
+             *
+             * * `4` (TCPv4)
+             * * `6` (TCPv6)
+             * * `-1` (Unix domain socket)
+             * * `'udp4'` or `'udp6'` (UDPv4 or UDPv6)
+             */
+            addressType: 4 | 6 | -1 | "udp4" | "udp6";
+        }
+        interface ClusterEventMap {
+            "disconnect": [worker: Worker];
+            "exit": [worker: Worker, code: number, signal: string];
+            "fork": [worker: Worker];
+            "listening": [worker: Worker, address: Address];
+            "message": [worker: Worker, message: any, handle: child_process.SendHandle];
+            "online": [worker: Worker];
+            "setup": [settings: ClusterSettings];
+        }
+        interface Cluster extends InternalEventEmitter<ClusterEventMap> {
+            /**
+             * A `Worker` object contains all public information and method about a worker.
+             * In the primary it can be obtained using `cluster.workers`. In a worker
+             * it can be obtained using `cluster.worker`.
+             * @since v0.7.0
+             */
+            Worker: typeof Worker;
+            disconnect(callback?: () => void): void;
+            /**
+             * Spawn a new worker process.
+             *
+             * This can only be called from the primary process.
+             * @param env Key/value pairs to add to worker process environment.
+             * @since v0.6.0
+             */
+            fork(env?: any): Worker;
+            /** @deprecated since v16.0.0 - use isPrimary. */
+            readonly isMaster: boolean;
+            /**
+             * True if the process is a primary. This is determined by the `process.env.NODE_UNIQUE_ID`. If `process.env.NODE_UNIQUE_ID`
+             * is undefined, then `isPrimary` is `true`.
+             * @since v16.0.0
+             */
+            readonly isPrimary: boolean;
+            /**
+             * True if the process is not a primary (it is the negation of `cluster.isPrimary`).
+             * @since v0.6.0
+             */
+            readonly isWorker: boolean;
+            /**
+             * The scheduling policy, either `cluster.SCHED_RR` for round-robin or `cluster.SCHED_NONE` to leave it to the operating system. This is a
+             * global setting and effectively frozen once either the first worker is spawned, or [`.setupPrimary()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clustersetupprimarysettings)
+             * is called, whichever comes first.
+             *
+             * `SCHED_RR` is the default on all operating systems except Windows. Windows will change to `SCHED_RR` once libuv is able to effectively distribute
+             * IOCP handles without incurring a large performance hit.
+             *
+             * `cluster.schedulingPolicy` can also be set through the `NODE_CLUSTER_SCHED_POLICY` environment variable. Valid values are `'rr'` and `'none'`.
+             * @since v0.11.2
+             */
+            schedulingPolicy: number;
+            /**
+             * After calling [`.setupPrimary()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clustersetupprimarysettings)
+             * (or [`.fork()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clusterforkenv)) this settings object will contain
+             * the settings, including the default values.
+             *
+             * This object is not intended to be changed or set manually.
+             * @since v0.7.1
+             */
+            readonly settings: ClusterSettings;
+            /** @deprecated since v16.0.0 - use [`.setupPrimary()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clustersetupprimarysettings) instead. */
+            setupMaster(settings?: ClusterSettings): void;
+            /**
+             * `setupPrimary` is used to change the default 'fork' behavior. Once called, the settings will be present in `cluster.settings`.
+             *
+             * Any settings changes only affect future calls to [`.fork()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clusterforkenv)
+             * and have no effect on workers that are already running.
+             *
+             * The only attribute of a worker that cannot be set via `.setupPrimary()` is the `env` passed to
+             * [`.fork()`](https://nodejs.org/docs/latest-v25.x/api/cluster.html#clusterforkenv).
+             *
+             * The defaults above apply to the first call only; the defaults for later calls are the current values at the time of
+             * `cluster.setupPrimary()` is called.
+             *
+             * ```js
+             * import cluster from 'node:cluster';
+             *
+             * cluster.setupPrimary({
+             *   exec: 'worker.js',
+             *   args: ['--use', 'https'],
+             *   silent: true,
+             * });
+             * cluster.fork(); // https worker
+             * cluster.setupPrimary({
+             *   exec: 'worker.js',
+             *   args: ['--use', 'http'],
+             * });
+             * cluster.fork(); // http worker
+             * ```
+             *
+             * This can only be called from the primary process.
+             * @since v16.0.0
+             */
+            setupPrimary(settings?: ClusterSettings): void;
+            /**
+             * A reference to the current worker object. Not available in the primary process.
+             *
+             * ```js
+             * import cluster from 'node:cluster';
+             *
+             * if (cluster.isPrimary) {
+             *   console.log('I am primary');
+             *   cluster.fork();
+             *   cluster.fork();
+             * } else if (cluster.isWorker) {
+             *   console.log(`I am worker #${cluster.worker.id}`);
+             * }
+             * ```
+             * @since v0.7.0
+             */
+            readonly worker?: Worker;
+            /**
+             * A hash that stores the active worker objects, keyed by `id` field. This makes it easy to loop through all the workers. It is only available in the primary process.
+             *
+             * A worker is removed from `cluster.workers` after the worker has disconnected _and_ exited. The order between these two events cannot be determined in advance. However, it
+             * is guaranteed that the removal from the `cluster.workers` list happens before the last `'disconnect'` or `'exit'` event is emitted.
+             *
+             * ```js
+             * import cluster from 'node:cluster';
+             *
+             * for (const worker of Object.values(cluster.workers)) {
+             *   worker.send('big announcement to all workers');
+             * }
+             * ```
+             * @since v0.7.0
+             */
+            readonly workers?: NodeJS.Dict<Worker>;
+            readonly SCHED_NONE: number;
+            readonly SCHED_RR: number;
+        }
+    }
+    var cluster: cluster.Cluster;
+    export = cluster;
+}
+declare module "cluster" {
+    import cluster = require("node:cluster");
+    export = cluster;
+}
diff --git a/mqtt-backend/node_modules/@types/node/compatibility/iterators.d.ts b/mqtt-backend/node_modules/@types/node/compatibility/iterators.d.ts
new file mode 100644
index 0000000..156e785
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/compatibility/iterators.d.ts
@@ -0,0 +1,21 @@
+// Backwards-compatible iterator interfaces, augmented with iterator helper methods by lib.esnext.iterator in TypeScript 5.6.
+// The IterableIterator interface does not contain these methods, which creates assignability issues in places where IteratorObjects
+// are expected (eg. DOM-compatible APIs) if lib.esnext.iterator is loaded.
+// Also ensures that iterators returned by the Node API, which inherit from Iterator.prototype, correctly expose the iterator helper methods
+// if lib.esnext.iterator is loaded.
+// TODO: remove once this package no longer supports TS 5.5, and replace NodeJS.BuiltinIteratorReturn with BuiltinIteratorReturn.
+
+// Placeholders for TS <5.6
+interface IteratorObject<T, TReturn, TNext> {}
+interface AsyncIteratorObject<T, TReturn, TNext> {}
+
+declare namespace NodeJS {
+    // Populate iterator methods for TS <5.6
+    interface Iterator<T, TReturn, TNext> extends globalThis.Iterator<T, TReturn, TNext> {}
+    interface AsyncIterator<T, TReturn, TNext> extends globalThis.AsyncIterator<T, TReturn, TNext> {}
+
+    // Polyfill for TS 5.6's instrinsic BuiltinIteratorReturn type, required for DOM-compatible iterators
+    type BuiltinIteratorReturn = ReturnType<any[][typeof Symbol.iterator]> extends
+        globalThis.Iterator<any, infer TReturn> ? TReturn
+        : any;
+}
diff --git a/mqtt-backend/node_modules/@types/node/console.d.ts b/mqtt-backend/node_modules/@types/node/console.d.ts
new file mode 100644
index 0000000..b7f8833
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/console.d.ts
@@ -0,0 +1,93 @@
+declare module "node:console" {
+    import { InspectOptions } from "node:util";
+    namespace console {
+        interface ConsoleOptions {
+            stdout: NodeJS.WritableStream;
+            stderr?: NodeJS.WritableStream | undefined;
+            /**
+             * Ignore errors when writing to the underlying streams.
+             * @default true
+             */
+            ignoreErrors?: boolean | undefined;
+            /**
+             * Set color support for this `Console` instance. Setting to true enables coloring while inspecting
+             * values. Setting to `false` disables coloring while inspecting values. Setting to `'auto'` makes color
+             * support depend on the value of the `isTTY` property and the value returned by `getColorDepth()` on the
+             * respective stream. This option can not be used, if `inspectOptions.colors` is set as well.
+             * @default 'auto'
+             */
+            colorMode?: boolean | "auto" | undefined;
+            /**
+             * Specifies options that are passed along to
+             * [`util.inspect()`](https://nodejs.org/docs/latest-v25.x/api/util.html#utilinspectobject-options).
+             */
+            inspectOptions?: InspectOptions | ReadonlyMap<NodeJS.WritableStream, InspectOptions> | undefined;
+            /**
+             * Set group indentation.
+             * @default 2
+             */
+            groupIndentation?: number | undefined;
+        }
+        interface Console {
+            readonly Console: {
+                prototype: Console;
+                new(stdout: NodeJS.WritableStream, stderr?: NodeJS.WritableStream, ignoreErrors?: boolean): Console;
+                new(options: ConsoleOptions): Console;
+            };
+            assert(condition?: unknown, ...data: any[]): void;
+            clear(): void;
+            count(label?: string): void;
+            countReset(label?: string): void;
+            debug(...data: any[]): void;
+            dir(item?: any, options?: InspectOptions): void;
+            dirxml(...data: any[]): void;
+            error(...data: any[]): void;
+            group(...data: any[]): void;
+            groupCollapsed(...data: any[]): void;
+            groupEnd(): void;
+            info(...data: any[]): void;
+            log(...data: any[]): void;
+            table(tabularData?: any, properties?: string[]): void;
+            time(label?: string): void;
+            timeEnd(label?: string): void;
+            timeLog(label?: string, ...data: any[]): void;
+            trace(...data: any[]): void;
+            warn(...data: any[]): void;
+            /**
+             * This method does not display anything unless used in the inspector. The `console.profile()`
+             * method starts a JavaScript CPU profile with an optional label until {@link profileEnd}
+             * is called. The profile is then added to the Profile panel of the inspector.
+             *
+             * ```js
+             * console.profile('MyLabel');
+             * // Some code
+             * console.profileEnd('MyLabel');
+             * // Adds the profile 'MyLabel' to the Profiles panel of the inspector.
+             * ```
+             * @since v8.0.0
+             */
+            profile(label?: string): void;
+            /**
+             * This method does not display anything unless used in the inspector. Stops the current
+             * JavaScript CPU profiling session if one has been started and prints the report to the
+             * Profiles panel of the inspector. See {@link profile} for an example.
+             *
+             * If this method is called without a label, the most recently started profile is stopped.
+             * @since v8.0.0
+             */
+            profileEnd(label?: string): void;
+            /**
+             * This method does not display anything unless used in the inspector. The `console.timeStamp()`
+             * method adds an event with the label `'label'` to the Timeline panel of the inspector.
+             * @since v8.0.0
+             */
+            timeStamp(label?: string): void;
+        }
+    }
+    var console: console.Console;
+    export = console;
+}
+declare module "console" {
+    import console = require("node:console");
+    export = console;
+}
diff --git a/mqtt-backend/node_modules/@types/node/constants.d.ts b/mqtt-backend/node_modules/@types/node/constants.d.ts
new file mode 100644
index 0000000..a271f9a
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/constants.d.ts
@@ -0,0 +1,14 @@
+declare module "node:constants" {
+    const constants:
+        & typeof import("node:os").constants.dlopen
+        & typeof import("node:os").constants.errno
+        & typeof import("node:os").constants.priority
+        & typeof import("node:os").constants.signals
+        & typeof import("node:fs").constants
+        & typeof import("node:crypto").constants;
+    export = constants;
+}
+declare module "constants" {
+    import constants = require("node:constants");
+    export = constants;
+}
diff --git a/mqtt-backend/node_modules/@types/node/crypto.d.ts b/mqtt-backend/node_modules/@types/node/crypto.d.ts
new file mode 100644
index 0000000..3ebfec6
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/crypto.d.ts
@@ -0,0 +1,4047 @@
+declare module "node:crypto" {
+    import { NonSharedBuffer } from "node:buffer";
+    import * as stream from "node:stream";
+    import { PeerCertificate } from "node:tls";
+    /**
+     * SPKAC is a Certificate Signing Request mechanism originally implemented by
+     * Netscape and was specified formally as part of HTML5's `keygen` element.
+     *
+     * `<keygen>` is deprecated since [HTML 5.2](https://www.w3.org/TR/html52/changes.html#features-removed) and new projects
+     * should not use this element anymore.
+     *
+     * The `node:crypto` module provides the `Certificate` class for working with SPKAC
+     * data. The most common usage is handling output generated by the HTML5 `<keygen>` element. Node.js uses [OpenSSL's SPKAC
+     * implementation](https://www.openssl.org/docs/man3.0/man1/openssl-spkac.html) internally.
+     * @since v0.11.8
+     */
+    class Certificate {
+        /**
+         * ```js
+         * const { Certificate } = await import('node:crypto');
+         * const spkac = getSpkacSomehow();
+         * const challenge = Certificate.exportChallenge(spkac);
+         * console.log(challenge.toString('utf8'));
+         * // Prints: the challenge as a UTF8 string
+         * ```
+         * @since v9.0.0
+         * @param encoding The `encoding` of the `spkac` string.
+         * @return The challenge component of the `spkac` data structure, which includes a public key and a challenge.
+         */
+        static exportChallenge(spkac: BinaryLike): NonSharedBuffer;
+        /**
+         * ```js
+         * const { Certificate } = await import('node:crypto');
+         * const spkac = getSpkacSomehow();
+         * const publicKey = Certificate.exportPublicKey(spkac);
+         * console.log(publicKey);
+         * // Prints: the public key as <Buffer ...>
+         * ```
+         * @since v9.0.0
+         * @param encoding The `encoding` of the `spkac` string.
+         * @return The public key component of the `spkac` data structure, which includes a public key and a challenge.
+         */
+        static exportPublicKey(spkac: BinaryLike, encoding?: string): NonSharedBuffer;
+        /**
+         * ```js
+         * import { Buffer } from 'node:buffer';
+         * const { Certificate } = await import('node:crypto');
+         *
+         * const spkac = getSpkacSomehow();
+         * console.log(Certificate.verifySpkac(Buffer.from(spkac)));
+         * // Prints: true or false
+         * ```
+         * @since v9.0.0
+         * @param encoding The `encoding` of the `spkac` string.
+         * @return `true` if the given `spkac` data structure is valid, `false` otherwise.
+         */
+        static verifySpkac(spkac: NodeJS.ArrayBufferView): boolean;
+        /**
+         * @deprecated
+         * @param spkac
+         * @returns The challenge component of the `spkac` data structure,
+         * which includes a public key and a challenge.
+         */
+        exportChallenge(spkac: BinaryLike): NonSharedBuffer;
+        /**
+         * @deprecated
+         * @param spkac
+         * @param encoding The encoding of the spkac string.
+         * @returns The public key component of the `spkac` data structure,
+         * which includes a public key and a challenge.
+         */
+        exportPublicKey(spkac: BinaryLike, encoding?: string): NonSharedBuffer;
+        /**
+         * @deprecated
+         * @param spkac
+         * @returns `true` if the given `spkac` data structure is valid,
+         * `false` otherwise.
+         */
+        verifySpkac(spkac: NodeJS.ArrayBufferView): boolean;
+    }
+    namespace constants {
+        // https://nodejs.org/dist/latest-v25.x/docs/api/crypto.html#crypto-constants
+        const OPENSSL_VERSION_NUMBER: number;
+        /** Applies multiple bug workarounds within OpenSSL. See https://www.openssl.org/docs/man1.0.2/ssl/SSL_CTX_set_options.html for detail. */
+        const SSL_OP_ALL: number;
+        /** Instructs OpenSSL to allow a non-[EC]DHE-based key exchange mode for TLS v1.3 */
+        const SSL_OP_ALLOW_NO_DHE_KEX: number;
+        /** Allows legacy insecure renegotiation between OpenSSL and unpatched clients or servers. See https://www.openssl.org/docs/man1.0.2/ssl/SSL_CTX_set_options.html. */
+        const SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION: number;
+        /** Attempts to use the server's preferences instead of the client's when selecting a cipher. See https://www.openssl.org/docs/man1.0.2/ssl/SSL_CTX_set_options.html. */
+        const SSL_OP_CIPHER_SERVER_PREFERENCE: number;
+        /** Instructs OpenSSL to use Cisco's version identifier of DTLS_BAD_VER. */
+        const SSL_OP_CISCO_ANYCONNECT: number;
+        /** Instructs OpenSSL to turn on cookie exchange. */
+        const SSL_OP_COOKIE_EXCHANGE: number;
+        /** Instructs OpenSSL to add server-hello extension from an early version of the cryptopro draft. */
+        const SSL_OP_CRYPTOPRO_TLSEXT_BUG: number;
+        /** Instructs OpenSSL to disable a SSL 3.0/TLS 1.0 vulnerability workaround added in OpenSSL 0.9.6d. */
+        const SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS: number;
+        /** Allows initial connection to servers that do not support RI. */
+        const SSL_OP_LEGACY_SERVER_CONNECT: number;
+        /** Instructs OpenSSL to disable support for SSL/TLS compression. */
+        const SSL_OP_NO_COMPRESSION: number;
+        /** Instructs OpenSSL to disable encrypt-then-MAC. */
+        const SSL_OP_NO_ENCRYPT_THEN_MAC: number;
+        const SSL_OP_NO_QUERY_MTU: number;
+        /** Instructs OpenSSL to disable renegotiation. */
+        const SSL_OP_NO_RENEGOTIATION: number;
+        /** Instructs OpenSSL to always start a new session when performing renegotiation. */
+        const SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION: number;
+        /** Instructs OpenSSL to turn off SSL v2 */
+        const SSL_OP_NO_SSLv2: number;
+        /** Instructs OpenSSL to turn off SSL v3 */
+        const SSL_OP_NO_SSLv3: number;
+        /** Instructs OpenSSL to disable use of RFC4507bis tickets. */
+        const SSL_OP_NO_TICKET: number;
+        /** Instructs OpenSSL to turn off TLS v1 */
+        const SSL_OP_NO_TLSv1: number;
+        /** Instructs OpenSSL to turn off TLS v1.1 */
+        const SSL_OP_NO_TLSv1_1: number;
+        /** Instructs OpenSSL to turn off TLS v1.2 */
+        const SSL_OP_NO_TLSv1_2: number;
+        /** Instructs OpenSSL to turn off TLS v1.3 */
+        const SSL_OP_NO_TLSv1_3: number;
+        /** Instructs OpenSSL server to prioritize ChaCha20-Poly1305 when the client does. This option has no effect if `SSL_OP_CIPHER_SERVER_PREFERENCE` is not enabled. */
+        const SSL_OP_PRIORITIZE_CHACHA: number;
+        /** Instructs OpenSSL to disable version rollback attack detection. */
+        const SSL_OP_TLS_ROLLBACK_BUG: number;
+        const ENGINE_METHOD_RSA: number;
+        const ENGINE_METHOD_DSA: number;
+        const ENGINE_METHOD_DH: number;
+        const ENGINE_METHOD_RAND: number;
+        const ENGINE_METHOD_EC: number;
+        const ENGINE_METHOD_CIPHERS: number;
+        const ENGINE_METHOD_DIGESTS: number;
+        const ENGINE_METHOD_PKEY_METHS: number;
+        const ENGINE_METHOD_PKEY_ASN1_METHS: number;
+        const ENGINE_METHOD_ALL: number;
+        const ENGINE_METHOD_NONE: number;
+        const DH_CHECK_P_NOT_SAFE_PRIME: number;
+        const DH_CHECK_P_NOT_PRIME: number;
+        const DH_UNABLE_TO_CHECK_GENERATOR: number;
+        const DH_NOT_SUITABLE_GENERATOR: number;
+        const RSA_PKCS1_PADDING: number;
+        const RSA_SSLV23_PADDING: number;
+        const RSA_NO_PADDING: number;
+        const RSA_PKCS1_OAEP_PADDING: number;
+        const RSA_X931_PADDING: number;
+        const RSA_PKCS1_PSS_PADDING: number;
+        /** Sets the salt length for RSA_PKCS1_PSS_PADDING to the digest size when signing or verifying. */
+        const RSA_PSS_SALTLEN_DIGEST: number;
+        /** Sets the salt length for RSA_PKCS1_PSS_PADDING to the maximum permissible value when signing data. */
+        const RSA_PSS_SALTLEN_MAX_SIGN: number;
+        /** Causes the salt length for RSA_PKCS1_PSS_PADDING to be determined automatically when verifying a signature. */
+        const RSA_PSS_SALTLEN_AUTO: number;
+        const POINT_CONVERSION_COMPRESSED: number;
+        const POINT_CONVERSION_UNCOMPRESSED: number;
+        const POINT_CONVERSION_HYBRID: number;
+        /** Specifies the built-in default cipher list used by Node.js (colon-separated values). */
+        const defaultCoreCipherList: string;
+        /** Specifies the active default cipher list used by the current Node.js process  (colon-separated values). */
+        const defaultCipherList: string;
+    }
+    interface HashOptions extends stream.TransformOptions {
+        /**
+         * For XOF hash functions such as `shake256`, the
+         * outputLength option can be used to specify the desired output length in bytes.
+         */
+        outputLength?: number | undefined;
+    }
+    /** @deprecated since v10.0.0 */
+    const fips: boolean;
+    /**
+     * Creates and returns a `Hash` object that can be used to generate hash digests
+     * using the given `algorithm`. Optional `options` argument controls stream
+     * behavior. For XOF hash functions such as `'shake256'`, the `outputLength` option
+     * can be used to specify the desired output length in bytes.
+     *
+     * The `algorithm` is dependent on the available algorithms supported by the
+     * version of OpenSSL on the platform. Examples are `'sha256'`, `'sha512'`, etc.
+     * On recent releases of OpenSSL, `openssl list -digest-algorithms` will
+     * display the available digest algorithms.
+     *
+     * Example: generating the sha256 sum of a file
+     *
+     * ```js
+     * import {
+     *   createReadStream,
+     * } from 'node:fs';
+     * import { argv } from 'node:process';
+     * const {
+     *   createHash,
+     * } = await import('node:crypto');
+     *
+     * const filename = argv[2];
+     *
+     * const hash = createHash('sha256');
+     *
+     * const input = createReadStream(filename);
+     * input.on('readable', () => {
+     *   // Only one element is going to be produced by the
+     *   // hash stream.
+     *   const data = input.read();
+     *   if (data)
+     *     hash.update(data);
+     *   else {
+     *     console.log(`${hash.digest('hex')} ${filename}`);
+     *   }
+     * });
+     * ```
+     * @since v0.1.92
+     * @param options `stream.transform` options
+     */
+    function createHash(algorithm: string, options?: HashOptions): Hash;
+    /**
+     * Creates and returns an `Hmac` object that uses the given `algorithm` and `key`.
+     * Optional `options` argument controls stream behavior.
+     *
+     * The `algorithm` is dependent on the available algorithms supported by the
+     * version of OpenSSL on the platform. Examples are `'sha256'`, `'sha512'`, etc.
+     * On recent releases of OpenSSL, `openssl list -digest-algorithms` will
+     * display the available digest algorithms.
+     *
+     * The `key` is the HMAC key used to generate the cryptographic HMAC hash. If it is
+     * a `KeyObject`, its type must be `secret`. If it is a string, please consider `caveats when using strings as inputs to cryptographic APIs`. If it was
+     * obtained from a cryptographically secure source of entropy, such as {@link randomBytes} or {@link generateKey}, its length should not
+     * exceed the block size of `algorithm` (e.g., 512 bits for SHA-256).
+     *
+     * Example: generating the sha256 HMAC of a file
+     *
+     * ```js
+     * import {
+     *   createReadStream,
+     * } from 'node:fs';
+     * import { argv } from 'node:process';
+     * const {
+     *   createHmac,
+     * } = await import('node:crypto');
+     *
+     * const filename = argv[2];
+     *
+     * const hmac = createHmac('sha256', 'a secret');
+     *
+     * const input = createReadStream(filename);
+     * input.on('readable', () => {
+     *   // Only one element is going to be produced by the
+     *   // hash stream.
+     *   const data = input.read();
+     *   if (data)
+     *     hmac.update(data);
+     *   else {
+     *     console.log(`${hmac.digest('hex')} ${filename}`);
+     *   }
+     * });
+     * ```
+     * @since v0.1.94
+     * @param options `stream.transform` options
+     */
+    function createHmac(algorithm: string, key: BinaryLike | KeyObject, options?: stream.TransformOptions): Hmac;
+    // https://nodejs.org/api/buffer.html#buffer_buffers_and_character_encodings
+    type BinaryToTextEncoding = "base64" | "base64url" | "hex" | "binary";
+    type CharacterEncoding = "utf8" | "utf-8" | "utf16le" | "utf-16le" | "latin1";
+    type LegacyCharacterEncoding = "ascii" | "binary" | "ucs2" | "ucs-2";
+    type Encoding = BinaryToTextEncoding | CharacterEncoding | LegacyCharacterEncoding;
+    type ECDHKeyFormat = "compressed" | "uncompressed" | "hybrid";
+    /**
+     * The `Hash` class is a utility for creating hash digests of data. It can be
+     * used in one of two ways:
+     *
+     * * As a `stream` that is both readable and writable, where data is written
+     * to produce a computed hash digest on the readable side, or
+     * * Using the `hash.update()` and `hash.digest()` methods to produce the
+     * computed hash.
+     *
+     * The {@link createHash} method is used to create `Hash` instances. `Hash`objects are not to be created directly using the `new` keyword.
+     *
+     * Example: Using `Hash` objects as streams:
+     *
+     * ```js
+     * const {
+     *   createHash,
+     * } = await import('node:crypto');
+     *
+     * const hash = createHash('sha256');
+     *
+     * hash.on('readable', () => {
+     *   // Only one element is going to be produced by the
+     *   // hash stream.
+     *   const data = hash.read();
+     *   if (data) {
+     *     console.log(data.toString('hex'));
+     *     // Prints:
+     *     //   6a2da20943931e9834fc12cfe5bb47bbd9ae43489a30726962b576f4e3993e50
+     *   }
+     * });
+     *
+     * hash.write('some data to hash');
+     * hash.end();
+     * ```
+     *
+     * Example: Using `Hash` and piped streams:
+     *
+     * ```js
+     * import { createReadStream } from 'node:fs';
+     * import { stdout } from 'node:process';
+     * const { createHash } = await import('node:crypto');
+     *
+     * const hash = createHash('sha256');
+     *
+     * const input = createReadStream('test.js');
+     * input.pipe(hash).setEncoding('hex').pipe(stdout);
+     * ```
+     *
+     * Example: Using the `hash.update()` and `hash.digest()` methods:
+     *
+     * ```js
+     * const {
+     *   createHash,
+     * } = await import('node:crypto');
+     *
+     * const hash = createHash('sha256');
+     *
+     * hash.update('some data to hash');
+     * console.log(hash.digest('hex'));
+     * // Prints:
+     * //   6a2da20943931e9834fc12cfe5bb47bbd9ae43489a30726962b576f4e3993e50
+     * ```
+     * @since v0.1.92
+     */
+    class Hash extends stream.Transform {
+        private constructor();
+        /**
+         * Creates a new `Hash` object that contains a deep copy of the internal state
+         * of the current `Hash` object.
+         *
+         * The optional `options` argument controls stream behavior. For XOF hash
+         * functions such as `'shake256'`, the `outputLength` option can be used to
+         * specify the desired output length in bytes.
+         *
+         * An error is thrown when an attempt is made to copy the `Hash` object after
+         * its `hash.digest()` method has been called.
+         *
+         * ```js
+         * // Calculate a rolling hash.
+         * const {
+         *   createHash,
+         * } = await import('node:crypto');
+         *
+         * const hash = createHash('sha256');
+         *
+         * hash.update('one');
+         * console.log(hash.copy().digest('hex'));
+         *
+         * hash.update('two');
+         * console.log(hash.copy().digest('hex'));
+         *
+         * hash.update('three');
+         * console.log(hash.copy().digest('hex'));
+         *
+         * // Etc.
+         * ```
+         * @since v13.1.0
+         * @param options `stream.transform` options
+         */
+        copy(options?: HashOptions): Hash;
+        /**
+         * Updates the hash content with the given `data`, the encoding of which
+         * is given in `inputEncoding`.
+         * If `encoding` is not provided, and the `data` is a string, an
+         * encoding of `'utf8'` is enforced. If `data` is a `Buffer`, `TypedArray`, or`DataView`, then `inputEncoding` is ignored.
+         *
+         * This can be called many times with new data as it is streamed.
+         * @since v0.1.92
+         * @param inputEncoding The `encoding` of the `data` string.
+         */
+        update(data: BinaryLike): Hash;
+        update(data: string, inputEncoding: Encoding): Hash;
+        /**
+         * Calculates the digest of all of the data passed to be hashed (using the `hash.update()` method).
+         * If `encoding` is provided a string will be returned; otherwise
+         * a `Buffer` is returned.
+         *
+         * The `Hash` object can not be used again after `hash.digest()` method has been
+         * called. Multiple calls will cause an error to be thrown.
+         * @since v0.1.92
+         * @param encoding The `encoding` of the return value.
+         */
+        digest(): NonSharedBuffer;
+        digest(encoding: BinaryToTextEncoding): string;
+    }
+    /**
+     * The `Hmac` class is a utility for creating cryptographic HMAC digests. It can
+     * be used in one of two ways:
+     *
+     * * As a `stream` that is both readable and writable, where data is written
+     * to produce a computed HMAC digest on the readable side, or
+     * * Using the `hmac.update()` and `hmac.digest()` methods to produce the
+     * computed HMAC digest.
+     *
+     * The {@link createHmac} method is used to create `Hmac` instances. `Hmac`objects are not to be created directly using the `new` keyword.
+     *
+     * Example: Using `Hmac` objects as streams:
+     *
+     * ```js
+     * const {
+     *   createHmac,
+     * } = await import('node:crypto');
+     *
+     * const hmac = createHmac('sha256', 'a secret');
+     *
+     * hmac.on('readable', () => {
+     *   // Only one element is going to be produced by the
+     *   // hash stream.
+     *   const data = hmac.read();
+     *   if (data) {
+     *     console.log(data.toString('hex'));
+     *     // Prints:
+     *     //   7fd04df92f636fd450bc841c9418e5825c17f33ad9c87c518115a45971f7f77e
+     *   }
+     * });
+     *
+     * hmac.write('some data to hash');
+     * hmac.end();
+     * ```
+     *
+     * Example: Using `Hmac` and piped streams:
+     *
+     * ```js
+     * import { createReadStream } from 'node:fs';
+     * import { stdout } from 'node:process';
+     * const {
+     *   createHmac,
+     * } = await import('node:crypto');
+     *
+     * const hmac = createHmac('sha256', 'a secret');
+     *
+     * const input = createReadStream('test.js');
+     * input.pipe(hmac).pipe(stdout);
+     * ```
+     *
+     * Example: Using the `hmac.update()` and `hmac.digest()` methods:
+     *
+     * ```js
+     * const {
+     *   createHmac,
+     * } = await import('node:crypto');
+     *
+     * const hmac = createHmac('sha256', 'a secret');
+     *
+     * hmac.update('some data to hash');
+     * console.log(hmac.digest('hex'));
+     * // Prints:
+     * //   7fd04df92f636fd450bc841c9418e5825c17f33ad9c87c518115a45971f7f77e
+     * ```
+     * @since v0.1.94
+     */
+    class Hmac extends stream.Transform {
+        private constructor();
+        /**
+         * Updates the `Hmac` content with the given `data`, the encoding of which
+         * is given in `inputEncoding`.
+         * If `encoding` is not provided, and the `data` is a string, an
+         * encoding of `'utf8'` is enforced. If `data` is a `Buffer`, `TypedArray`, or`DataView`, then `inputEncoding` is ignored.
+         *
+         * This can be called many times with new data as it is streamed.
+         * @since v0.1.94
+         * @param inputEncoding The `encoding` of the `data` string.
+         */
+        update(data: BinaryLike): Hmac;
+        update(data: string, inputEncoding: Encoding): Hmac;
+        /**
+         * Calculates the HMAC digest of all of the data passed using `hmac.update()`.
+         * If `encoding` is
+         * provided a string is returned; otherwise a `Buffer` is returned;
+         *
+         * The `Hmac` object can not be used again after `hmac.digest()` has been
+         * called. Multiple calls to `hmac.digest()` will result in an error being thrown.
+         * @since v0.1.94
+         * @param encoding The `encoding` of the return value.
+         */
+        digest(): NonSharedBuffer;
+        digest(encoding: BinaryToTextEncoding): string;
+    }
+    type KeyFormat = "pem" | "der" | "jwk";
+    type KeyObjectType = "secret" | "public" | "private";
+    type PublicKeyExportType = "pkcs1" | "spki";
+    type PrivateKeyExportType = "pkcs1" | "pkcs8" | "sec1";
+    type KeyExportOptions =
+        | SymmetricKeyExportOptions
+        | PublicKeyExportOptions
+        | PrivateKeyExportOptions
+        | JwkKeyExportOptions;
+    interface SymmetricKeyExportOptions {
+        format?: "buffer" | undefined;
+    }
+    interface PublicKeyExportOptions<T extends PublicKeyExportType = PublicKeyExportType> {
+        type: T;
+        format: Exclude<KeyFormat, "jwk">;
+    }
+    interface PrivateKeyExportOptions<T extends PrivateKeyExportType = PrivateKeyExportType> {
+        type: T;
+        format: Exclude<KeyFormat, "jwk">;
+        cipher?: string | undefined;
+        passphrase?: string | Buffer | undefined;
+    }
+    interface JwkKeyExportOptions {
+        format: "jwk";
+    }
+    interface KeyPairExportOptions<
+        TPublic extends PublicKeyExportType = PublicKeyExportType,
+        TPrivate extends PrivateKeyExportType = PrivateKeyExportType,
+    > {
+        publicKeyEncoding?: PublicKeyExportOptions<TPublic> | JwkKeyExportOptions | undefined;
+        privateKeyEncoding?: PrivateKeyExportOptions<TPrivate> | JwkKeyExportOptions | undefined;
+    }
+    type KeyExportResult<T, Default> = T extends { format: infer F extends KeyFormat }
+        ? { der: NonSharedBuffer; jwk: webcrypto.JsonWebKey; pem: string }[F]
+        : Default;
+    interface KeyPairExportResult<T extends KeyPairExportOptions> {
+        publicKey: KeyExportResult<T["publicKeyEncoding"], KeyObject>;
+        privateKey: KeyExportResult<T["privateKeyEncoding"], KeyObject>;
+    }
+    type KeyPairExportCallback<T extends KeyPairExportOptions> = (
+        err: Error | null,
+        publicKey: KeyExportResult<T["publicKeyEncoding"], KeyObject>,
+        privateKey: KeyExportResult<T["privateKeyEncoding"], KeyObject>,
+    ) => void;
+    type MLDSAKeyType = `ml-dsa-${44 | 65 | 87}`;
+    type MLKEMKeyType = `ml-kem-${1024 | 512 | 768}`;
+    type SLHDSAKeyType = `slh-dsa-${"sha2" | "shake"}-${128 | 192 | 256}${"f" | "s"}`;
+    type AsymmetricKeyType =
+        | "dh"
+        | "dsa"
+        | "ec"
+        | "ed25519"
+        | "ed448"
+        | MLDSAKeyType
+        | MLKEMKeyType
+        | "rsa-pss"
+        | "rsa"
+        | SLHDSAKeyType
+        | "x25519"
+        | "x448";
+    interface AsymmetricKeyDetails {
+        /**
+         * Key size in bits (RSA, DSA).
+         */
+        modulusLength?: number;
+        /**
+         * Public exponent (RSA).
+         */
+        publicExponent?: bigint;
+        /**
+         * Name of the message digest (RSA-PSS).
+         */
+        hashAlgorithm?: string;
+        /**
+         * Name of the message digest used by MGF1 (RSA-PSS).
+         */
+        mgf1HashAlgorithm?: string;
+        /**
+         * Minimal salt length in bytes (RSA-PSS).
+         */
+        saltLength?: number;
+        /**
+         * Size of q in bits (DSA).
+         */
+        divisorLength?: number;
+        /**
+         * Name of the curve (EC).
+         */
+        namedCurve?: string;
+    }
+    /**
+     * Node.js uses a `KeyObject` class to represent a symmetric or asymmetric key,
+     * and each kind of key exposes different functions. The {@link createSecretKey}, {@link createPublicKey} and {@link createPrivateKey} methods are used to create `KeyObject`instances. `KeyObject`
+     * objects are not to be created directly using the `new`keyword.
+     *
+     * Most applications should consider using the new `KeyObject` API instead of
+     * passing keys as strings or `Buffer`s due to improved security features.
+     *
+     * `KeyObject` instances can be passed to other threads via `postMessage()`.
+     * The receiver obtains a cloned `KeyObject`, and the `KeyObject` does not need to
+     * be listed in the `transferList` argument.
+     * @since v11.6.0
+     */
+    class KeyObject {
+        private constructor();
+        /**
+         * Example: Converting a `CryptoKey` instance to a `KeyObject`:
+         *
+         * ```js
+         * const { KeyObject } = await import('node:crypto');
+         * const { subtle } = globalThis.crypto;
+         *
+         * const key = await subtle.generateKey({
+         *   name: 'HMAC',
+         *   hash: 'SHA-256',
+         *   length: 256,
+         * }, true, ['sign', 'verify']);
+         *
+         * const keyObject = KeyObject.from(key);
+         * console.log(keyObject.symmetricKeySize);
+         * // Prints: 32 (symmetric key size in bytes)
+         * ```
+         * @since v15.0.0
+         */
+        static from(key: webcrypto.CryptoKey): KeyObject;
+        /**
+         * For asymmetric keys, this property represents the type of the key. See the
+         * supported [asymmetric key types](https://nodejs.org/docs/latest-v25.x/api/crypto.html#asymmetric-key-types).
+         *
+         * This property is `undefined` for unrecognized `KeyObject` types and symmetric
+         * keys.
+         * @since v11.6.0
+         */
+        asymmetricKeyType?: AsymmetricKeyType;
+        /**
+         * This property exists only on asymmetric keys. Depending on the type of the key,
+         * this object contains information about the key. None of the information obtained
+         * through this property can be used to uniquely identify a key or to compromise
+         * the security of the key.
+         *
+         * For RSA-PSS keys, if the key material contains a `RSASSA-PSS-params` sequence,
+         * the `hashAlgorithm`, `mgf1HashAlgorithm`, and `saltLength` properties will be
+         * set.
+         *
+         * Other key details might be exposed via this API using additional attributes.
+         * @since v15.7.0
+         */
+        asymmetricKeyDetails?: AsymmetricKeyDetails;
+        /**
+         * For symmetric keys, the following encoding options can be used:
+         *
+         * For public keys, the following encoding options can be used:
+         *
+         * For private keys, the following encoding options can be used:
+         *
+         * The result type depends on the selected encoding format, when PEM the
+         * result is a string, when DER it will be a buffer containing the data
+         * encoded as DER, when [JWK](https://tools.ietf.org/html/rfc7517) it will be an object.
+         *
+         * When [JWK](https://tools.ietf.org/html/rfc7517) encoding format was selected, all other encoding options are
+         * ignored.
+         *
+         * PKCS#1, SEC1, and PKCS#8 type keys can be encrypted by using a combination of
+         * the `cipher` and `format` options. The PKCS#8 `type` can be used with any`format` to encrypt any key algorithm (RSA, EC, or DH) by specifying a`cipher`. PKCS#1 and SEC1 can only be
+         * encrypted by specifying a `cipher`when the PEM `format` is used. For maximum compatibility, use PKCS#8 for
+         * encrypted private keys. Since PKCS#8 defines its own
+         * encryption mechanism, PEM-level encryption is not supported when encrypting
+         * a PKCS#8 key. See [RFC 5208](https://www.rfc-editor.org/rfc/rfc5208.txt) for PKCS#8 encryption and [RFC 1421](https://www.rfc-editor.org/rfc/rfc1421.txt) for
+         * PKCS#1 and SEC1 encryption.
+         * @since v11.6.0
+         */
+        export<T extends KeyExportOptions = {}>(options?: T): KeyExportResult<T, NonSharedBuffer>;
+        /**
+         * Returns `true` or `false` depending on whether the keys have exactly the same
+         * type, value, and parameters. This method is not [constant time](https://en.wikipedia.org/wiki/Timing_attack).
+         * @since v17.7.0, v16.15.0
+         * @param otherKeyObject A `KeyObject` with which to compare `keyObject`.
+         */
+        equals(otherKeyObject: KeyObject): boolean;
+        /**
+         * For secret keys, this property represents the size of the key in bytes. This
+         * property is `undefined` for asymmetric keys.
+         * @since v11.6.0
+         */
+        symmetricKeySize?: number;
+        /**
+         * Converts a `KeyObject` instance to a `CryptoKey`.
+         * @since 22.10.0
+         */
+        toCryptoKey(
+            algorithm:
+                | webcrypto.AlgorithmIdentifier
+                | webcrypto.RsaHashedImportParams
+                | webcrypto.EcKeyImportParams
+                | webcrypto.HmacImportParams,
+            extractable: boolean,
+            keyUsages: readonly webcrypto.KeyUsage[],
+        ): webcrypto.CryptoKey;
+        /**
+         * Depending on the type of this `KeyObject`, this property is either`'secret'` for secret (symmetric) keys, `'public'` for public (asymmetric) keys
+         * or `'private'` for private (asymmetric) keys.
+         * @since v11.6.0
+         */
+        type: KeyObjectType;
+    }
+    type CipherCCMTypes = "aes-128-ccm" | "aes-192-ccm" | "aes-256-ccm";
+    type CipherGCMTypes = "aes-128-gcm" | "aes-192-gcm" | "aes-256-gcm";
+    type CipherOCBTypes = "aes-128-ocb" | "aes-192-ocb" | "aes-256-ocb";
+    type CipherChaCha20Poly1305Types = "chacha20-poly1305";
+    type BinaryLike = string | NodeJS.ArrayBufferView;
+    type CipherKey = BinaryLike | KeyObject;
+    interface CipherCCMOptions extends stream.TransformOptions {
+        authTagLength: number;
+    }
+    interface CipherGCMOptions extends stream.TransformOptions {
+        authTagLength?: number | undefined;
+    }
+    interface CipherOCBOptions extends stream.TransformOptions {
+        authTagLength: number;
+    }
+    interface CipherChaCha20Poly1305Options extends stream.TransformOptions {
+        /** @default 16 */
+        authTagLength?: number | undefined;
+    }
+    /**
+     * Creates and returns a `Cipher` object, with the given `algorithm`, `key` and
+     * initialization vector (`iv`).
+     *
+     * The `options` argument controls stream behavior and is optional except when a
+     * cipher in CCM or OCB mode (e.g. `'aes-128-ccm'`) is used. In that case, the`authTagLength` option is required and specifies the length of the
+     * authentication tag in bytes, see `CCM mode`. In GCM mode, the `authTagLength`option is not required but can be used to set the length of the authentication
+     * tag that will be returned by `getAuthTag()` and defaults to 16 bytes.
+     * For `chacha20-poly1305`, the `authTagLength` option defaults to 16 bytes.
+     *
+     * The `algorithm` is dependent on OpenSSL, examples are `'aes192'`, etc. On
+     * recent OpenSSL releases, `openssl list -cipher-algorithms` will
+     * display the available cipher algorithms.
+     *
+     * The `key` is the raw key used by the `algorithm` and `iv` is an [initialization vector](https://en.wikipedia.org/wiki/Initialization_vector). Both arguments must be `'utf8'` encoded
+     * strings,`Buffers`, `TypedArray`, or `DataView`s. The `key` may optionally be
+     * a `KeyObject` of type `secret`. If the cipher does not need
+     * an initialization vector, `iv` may be `null`.
+     *
+     * When passing strings for `key` or `iv`, please consider `caveats when using strings as inputs to cryptographic APIs`.
+     *
+     * Initialization vectors should be unpredictable and unique; ideally, they will be
+     * cryptographically random. They do not have to be secret: IVs are typically just
+     * added to ciphertext messages unencrypted. It may sound contradictory that
+     * something has to be unpredictable and unique, but does not have to be secret;
+     * remember that an attacker must not be able to predict ahead of time what a
+     * given IV will be.
+     * @since v0.1.94
+     * @param options `stream.transform` options
+     */
+    function createCipheriv(
+        algorithm: CipherCCMTypes,
+        key: CipherKey,
+        iv: BinaryLike,
+        options: CipherCCMOptions,
+    ): CipherCCM;
+    function createCipheriv(
+        algorithm: CipherOCBTypes,
+        key: CipherKey,
+        iv: BinaryLike,
+        options: CipherOCBOptions,
+    ): CipherOCB;
+    function createCipheriv(
+        algorithm: CipherGCMTypes,
+        key: CipherKey,
+        iv: BinaryLike,
+        options?: CipherGCMOptions,
+    ): CipherGCM;
+    function createCipheriv(
+        algorithm: CipherChaCha20Poly1305Types,
+        key: CipherKey,
+        iv: BinaryLike,
+        options?: CipherChaCha20Poly1305Options,
+    ): CipherChaCha20Poly1305;
+    function createCipheriv(
+        algorithm: string,
+        key: CipherKey,
+        iv: BinaryLike | null,
+        options?: stream.TransformOptions,
+    ): Cipheriv;
+    /**
+     * Instances of the `Cipheriv` class are used to encrypt data. The class can be
+     * used in one of two ways:
+     *
+     * * As a `stream` that is both readable and writable, where plain unencrypted
+     * data is written to produce encrypted data on the readable side, or
+     * * Using the `cipher.update()` and `cipher.final()` methods to produce
+     * the encrypted data.
+     *
+     * The {@link createCipheriv} method is
+     * used to create `Cipheriv` instances. `Cipheriv` objects are not to be created
+     * directly using the `new` keyword.
+     *
+     * Example: Using `Cipheriv` objects as streams:
+     *
+     * ```js
+     * const {
+     *   scrypt,
+     *   randomFill,
+     *   createCipheriv,
+     * } = await import('node:crypto');
+     *
+     * const algorithm = 'aes-192-cbc';
+     * const password = 'Password used to generate key';
+     *
+     * // First, we'll generate the key. The key length is dependent on the algorithm.
+     * // In this case for aes192, it is 24 bytes (192 bits).
+     * scrypt(password, 'salt', 24, (err, key) => {
+     *   if (err) throw err;
+     *   // Then, we'll generate a random initialization vector
+     *   randomFill(new Uint8Array(16), (err, iv) => {
+     *     if (err) throw err;
+     *
+     *     // Once we have the key and iv, we can create and use the cipher...
+     *     const cipher = createCipheriv(algorithm, key, iv);
+     *
+     *     let encrypted = '';
+     *     cipher.setEncoding('hex');
+     *
+     *     cipher.on('data', (chunk) => encrypted += chunk);
+     *     cipher.on('end', () => console.log(encrypted));
+     *
+     *     cipher.write('some clear text data');
+     *     cipher.end();
+     *   });
+     * });
+     * ```
+     *
+     * Example: Using `Cipheriv` and piped streams:
+     *
+     * ```js
+     * import {
+     *   createReadStream,
+     *   createWriteStream,
+     * } from 'node:fs';
+     *
+     * import {
+     *   pipeline,
+     * } from 'node:stream';
+     *
+     * const {
+     *   scrypt,
+     *   randomFill,
+     *   createCipheriv,
+     * } = await import('node:crypto');
+     *
+     * const algorithm = 'aes-192-cbc';
+     * const password = 'Password used to generate key';
+     *
+     * // First, we'll generate the key. The key length is dependent on the algorithm.
+     * // In this case for aes192, it is 24 bytes (192 bits).
+     * scrypt(password, 'salt', 24, (err, key) => {
+     *   if (err) throw err;
+     *   // Then, we'll generate a random initialization vector
+     *   randomFill(new Uint8Array(16), (err, iv) => {
+     *     if (err) throw err;
+     *
+     *     const cipher = createCipheriv(algorithm, key, iv);
+     *
+     *     const input = createReadStream('test.js');
+     *     const output = createWriteStream('test.enc');
+     *
+     *     pipeline(input, cipher, output, (err) => {
+     *       if (err) throw err;
+     *     });
+     *   });
+     * });
+     * ```
+     *
+     * Example: Using the `cipher.update()` and `cipher.final()` methods:
+     *
+     * ```js
+     * const {
+     *   scrypt,
+     *   randomFill,
+     *   createCipheriv,
+     * } = await import('node:crypto');
+     *
+     * const algorithm = 'aes-192-cbc';
+     * const password = 'Password used to generate key';
+     *
+     * // First, we'll generate the key. The key length is dependent on the algorithm.
+     * // In this case for aes192, it is 24 bytes (192 bits).
+     * scrypt(password, 'salt', 24, (err, key) => {
+     *   if (err) throw err;
+     *   // Then, we'll generate a random initialization vector
+     *   randomFill(new Uint8Array(16), (err, iv) => {
+     *     if (err) throw err;
+     *
+     *     const cipher = createCipheriv(algorithm, key, iv);
+     *
+     *     let encrypted = cipher.update('some clear text data', 'utf8', 'hex');
+     *     encrypted += cipher.final('hex');
+     *     console.log(encrypted);
+     *   });
+     * });
+     * ```
+     * @since v0.1.94
+     */
+    class Cipheriv extends stream.Transform {
+        private constructor();
+        /**
+         * Updates the cipher with `data`. If the `inputEncoding` argument is given,
+         * the `data`argument is a string using the specified encoding. If the `inputEncoding`argument is not given, `data` must be a `Buffer`, `TypedArray`, or `DataView`. If `data` is a `Buffer`,
+         * `TypedArray`, or `DataView`, then `inputEncoding` is ignored.
+         *
+         * The `outputEncoding` specifies the output format of the enciphered
+         * data. If the `outputEncoding`is specified, a string using the specified encoding is returned. If no`outputEncoding` is provided, a `Buffer` is returned.
+         *
+         * The `cipher.update()` method can be called multiple times with new data until `cipher.final()` is called. Calling `cipher.update()` after `cipher.final()` will result in an error being
+         * thrown.
+         * @since v0.1.94
+         * @param inputEncoding The `encoding` of the data.
+         * @param outputEncoding The `encoding` of the return value.
+         */
+        update(data: BinaryLike): NonSharedBuffer;
+        update(data: string, inputEncoding: Encoding): NonSharedBuffer;
+        update(data: NodeJS.ArrayBufferView, inputEncoding: undefined, outputEncoding: Encoding): string;
+        update(data: string, inputEncoding: Encoding | undefined, outputEncoding: Encoding): string;
+        /**
+         * Once the `cipher.final()` method has been called, the `Cipheriv` object can no
+         * longer be used to encrypt data. Attempts to call `cipher.final()` more than
+         * once will result in an error being thrown.
+         * @since v0.1.94
+         * @param outputEncoding The `encoding` of the return value.
+         * @return Any remaining enciphered contents. If `outputEncoding` is specified, a string is returned. If an `outputEncoding` is not provided, a {@link Buffer} is returned.
+         */
+        final(): NonSharedBuffer;
+        final(outputEncoding: BufferEncoding): string;
+        /**
+         * When using block encryption algorithms, the `Cipheriv` class will automatically
+         * add padding to the input data to the appropriate block size. To disable the
+         * default padding call `cipher.setAutoPadding(false)`.
+         *
+         * When `autoPadding` is `false`, the length of the entire input data must be a
+         * multiple of the cipher's block size or `cipher.final()` will throw an error.
+         * Disabling automatic padding is useful for non-standard padding, for instance
+         * using `0x0` instead of PKCS padding.
+         *
+         * The `cipher.setAutoPadding()` method must be called before `cipher.final()`.
+         * @since v0.7.1
+         * @param [autoPadding=true]
+         * @return for method chaining.
+         */
+        setAutoPadding(autoPadding?: boolean): this;
+    }
+    interface CipherCCM extends Cipheriv {
+        setAAD(
+            buffer: NodeJS.ArrayBufferView,
+            options: {
+                plaintextLength: number;
+            },
+        ): this;
+        getAuthTag(): NonSharedBuffer;
+    }
+    interface CipherGCM extends Cipheriv {
+        setAAD(
+            buffer: NodeJS.ArrayBufferView,
+            options?: {
+                plaintextLength: number;
+            },
+        ): this;
+        getAuthTag(): NonSharedBuffer;
+    }
+    interface CipherOCB extends Cipheriv {
+        setAAD(
+            buffer: NodeJS.ArrayBufferView,
+            options?: {
+                plaintextLength: number;
+            },
+        ): this;
+        getAuthTag(): NonSharedBuffer;
+    }
+    interface CipherChaCha20Poly1305 extends Cipheriv {
+        setAAD(
+            buffer: NodeJS.ArrayBufferView,
+            options: {
+                plaintextLength: number;
+            },
+        ): this;
+        getAuthTag(): NonSharedBuffer;
+    }
+    /**
+     * Creates and returns a `Decipheriv` object that uses the given `algorithm`, `key` and initialization vector (`iv`).
+     *
+     * The `options` argument controls stream behavior and is optional except when a
+     * cipher in CCM or OCB mode (e.g. `'aes-128-ccm'`) is used. In that case, the `authTagLength` option is required and specifies the length of the
+     * authentication tag in bytes, see `CCM mode`. In GCM mode, the `authTagLength` option is not required but can be used to restrict accepted authentication tags
+     * to those with the specified length.
+     * For `chacha20-poly1305`, the `authTagLength` option defaults to 16 bytes.
+     *
+     * The `algorithm` is dependent on OpenSSL, examples are `'aes192'`, etc. On
+     * recent OpenSSL releases, `openssl list -cipher-algorithms` will
+     * display the available cipher algorithms.
+     *
+     * The `key` is the raw key used by the `algorithm` and `iv` is an [initialization vector](https://en.wikipedia.org/wiki/Initialization_vector). Both arguments must be `'utf8'` encoded
+     * strings,`Buffers`, `TypedArray`, or `DataView`s. The `key` may optionally be
+     * a `KeyObject` of type `secret`. If the cipher does not need
+     * an initialization vector, `iv` may be `null`.
+     *
+     * When passing strings for `key` or `iv`, please consider `caveats when using strings as inputs to cryptographic APIs`.
+     *
+     * Initialization vectors should be unpredictable and unique; ideally, they will be
+     * cryptographically random. They do not have to be secret: IVs are typically just
+     * added to ciphertext messages unencrypted. It may sound contradictory that
+     * something has to be unpredictable and unique, but does not have to be secret;
+     * remember that an attacker must not be able to predict ahead of time what a given
+     * IV will be.
+     * @since v0.1.94
+     * @param options `stream.transform` options
+     */
+    function createDecipheriv(
+        algorithm: CipherCCMTypes,
+        key: CipherKey,
+        iv: BinaryLike,
+        options: CipherCCMOptions,
+    ): DecipherCCM;
+    function createDecipheriv(
+        algorithm: CipherOCBTypes,
+        key: CipherKey,
+        iv: BinaryLike,
+        options: CipherOCBOptions,
+    ): DecipherOCB;
+    function createDecipheriv(
+        algorithm: CipherGCMTypes,
+        key: CipherKey,
+        iv: BinaryLike,
+        options?: CipherGCMOptions,
+    ): DecipherGCM;
+    function createDecipheriv(
+        algorithm: CipherChaCha20Poly1305Types,
+        key: CipherKey,
+        iv: BinaryLike,
+        options?: CipherChaCha20Poly1305Options,
+    ): DecipherChaCha20Poly1305;
+    function createDecipheriv(
+        algorithm: string,
+        key: CipherKey,
+        iv: BinaryLike | null,
+        options?: stream.TransformOptions,
+    ): Decipheriv;
+    /**
+     * Instances of the `Decipheriv` class are used to decrypt data. The class can be
+     * used in one of two ways:
+     *
+     * * As a `stream` that is both readable and writable, where plain encrypted
+     * data is written to produce unencrypted data on the readable side, or
+     * * Using the `decipher.update()` and `decipher.final()` methods to
+     * produce the unencrypted data.
+     *
+     * The {@link createDecipheriv} method is
+     * used to create `Decipheriv` instances. `Decipheriv` objects are not to be created
+     * directly using the `new` keyword.
+     *
+     * Example: Using `Decipheriv` objects as streams:
+     *
+     * ```js
+     * import { Buffer } from 'node:buffer';
+     * const {
+     *   scryptSync,
+     *   createDecipheriv,
+     * } = await import('node:crypto');
+     *
+     * const algorithm = 'aes-192-cbc';
+     * const password = 'Password used to generate key';
+     * // Key length is dependent on the algorithm. In this case for aes192, it is
+     * // 24 bytes (192 bits).
+     * // Use the async `crypto.scrypt()` instead.
+     * const key = scryptSync(password, 'salt', 24);
+     * // The IV is usually passed along with the ciphertext.
+     * const iv = Buffer.alloc(16, 0); // Initialization vector.
+     *
+     * const decipher = createDecipheriv(algorithm, key, iv);
+     *
+     * let decrypted = '';
+     * decipher.on('readable', () => {
+     *   let chunk;
+     *   while (null !== (chunk = decipher.read())) {
+     *     decrypted += chunk.toString('utf8');
+     *   }
+     * });
+     * decipher.on('end', () => {
+     *   console.log(decrypted);
+     *   // Prints: some clear text data
+     * });
+     *
+     * // Encrypted with same algorithm, key and iv.
+     * const encrypted =
+     *   'e5f79c5915c02171eec6b212d5520d44480993d7d622a7c4c2da32f6efda0ffa';
+     * decipher.write(encrypted, 'hex');
+     * decipher.end();
+     * ```
+     *
+     * Example: Using `Decipheriv` and piped streams:
+     *
+     * ```js
+     * import {
+     *   createReadStream,
+     *   createWriteStream,
+     * } from 'node:fs';
+     * import { Buffer } from 'node:buffer';
+     * const {
+     *   scryptSync,
+     *   createDecipheriv,
+     * } = await import('node:crypto');
+     *
+     * const algorithm = 'aes-192-cbc';
+     * const password = 'Password used to generate key';
+     * // Use the async `crypto.scrypt()` instead.
+     * const key = scryptSync(password, 'salt', 24);
+     * // The IV is usually passed along with the ciphertext.
+     * const iv = Buffer.alloc(16, 0); // Initialization vector.
+     *
+     * const decipher = createDecipheriv(algorithm, key, iv);
+     *
+     * const input = createReadStream('test.enc');
+     * const output = createWriteStream('test.js');
+     *
+     * input.pipe(decipher).pipe(output);
+     * ```
+     *
+     * Example: Using the `decipher.update()` and `decipher.final()` methods:
+     *
+     * ```js
+     * import { Buffer } from 'node:buffer';
+     * const {
+     *   scryptSync,
+     *   createDecipheriv,
+     * } = await import('node:crypto');
+     *
+     * const algorithm = 'aes-192-cbc';
+     * const password = 'Password used to generate key';
+     * // Use the async `crypto.scrypt()` instead.
+     * const key = scryptSync(password, 'salt', 24);
+     * // The IV is usually passed along with the ciphertext.
+     * const iv = Buffer.alloc(16, 0); // Initialization vector.
+     *
+     * const decipher = createDecipheriv(algorithm, key, iv);
+     *
+     * // Encrypted using same algorithm, key and iv.
+     * const encrypted =
+     *   'e5f79c5915c02171eec6b212d5520d44480993d7d622a7c4c2da32f6efda0ffa';
+     * let decrypted = decipher.update(encrypted, 'hex', 'utf8');
+     * decrypted += decipher.final('utf8');
+     * console.log(decrypted);
+     * // Prints: some clear text data
+     * ```
+     * @since v0.1.94
+     */
+    class Decipheriv extends stream.Transform {
+        private constructor();
+        /**
+         * Updates the decipher with `data`. If the `inputEncoding` argument is given,
+         * the `data` argument is a string using the specified encoding. If the `inputEncoding` argument is not given, `data` must be a `Buffer`. If `data` is a `Buffer` then `inputEncoding` is
+         * ignored.
+         *
+         * The `outputEncoding` specifies the output format of the enciphered
+         * data. If the `outputEncoding` is specified, a string using the specified encoding is returned. If no `outputEncoding` is provided, a `Buffer` is returned.
+         *
+         * The `decipher.update()` method can be called multiple times with new data until `decipher.final()` is called. Calling `decipher.update()` after `decipher.final()` will result in an error
+         * being thrown.
+         * @since v0.1.94
+         * @param inputEncoding The `encoding` of the `data` string.
+         * @param outputEncoding The `encoding` of the return value.
+         */
+        update(data: NodeJS.ArrayBufferView): NonSharedBuffer;
+        update(data: string, inputEncoding: Encoding): NonSharedBuffer;
+        update(data: NodeJS.ArrayBufferView, inputEncoding: undefined, outputEncoding: Encoding): string;
+        update(data: string, inputEncoding: Encoding | undefined, outputEncoding: Encoding): string;
+        /**
+         * Once the `decipher.final()` method has been called, the `Decipheriv` object can
+         * no longer be used to decrypt data. Attempts to call `decipher.final()` more
+         * than once will result in an error being thrown.
+         * @since v0.1.94
+         * @param outputEncoding The `encoding` of the return value.
+         * @return Any remaining deciphered contents. If `outputEncoding` is specified, a string is returned. If an `outputEncoding` is not provided, a {@link Buffer} is returned.
+         */
+        final(): NonSharedBuffer;
+        final(outputEncoding: BufferEncoding): string;
+        /**
+         * When data has been encrypted without standard block padding, calling `decipher.setAutoPadding(false)` will disable automatic padding to prevent `decipher.final()` from checking for and
+         * removing padding.
+         *
+         * Turning auto padding off will only work if the input data's length is a
+         * multiple of the ciphers block size.
+         *
+         * The `decipher.setAutoPadding()` method must be called before `decipher.final()`.
+         * @since v0.7.1
+         * @param [autoPadding=true]
+         * @return for method chaining.
+         */
+        setAutoPadding(auto_padding?: boolean): this;
+    }
+    interface DecipherCCM extends Decipheriv {
+        setAuthTag(buffer: NodeJS.ArrayBufferView): this;
+        setAAD(
+            buffer: NodeJS.ArrayBufferView,
+            options: {
+                plaintextLength: number;
+            },
+        ): this;
+    }
+    interface DecipherGCM extends Decipheriv {
+        setAuthTag(buffer: NodeJS.ArrayBufferView): this;
+        setAAD(
+            buffer: NodeJS.ArrayBufferView,
+            options?: {
+                plaintextLength: number;
+            },
+        ): this;
+    }
+    interface DecipherOCB extends Decipheriv {
+        setAuthTag(buffer: NodeJS.ArrayBufferView): this;
+        setAAD(
+            buffer: NodeJS.ArrayBufferView,
+            options?: {
+                plaintextLength: number;
+            },
+        ): this;
+    }
+    interface DecipherChaCha20Poly1305 extends Decipheriv {
+        setAuthTag(buffer: NodeJS.ArrayBufferView): this;
+        setAAD(
+            buffer: NodeJS.ArrayBufferView,
+            options: {
+                plaintextLength: number;
+            },
+        ): this;
+    }
+    interface PrivateKeyInput {
+        key: string | Buffer;
+        format?: KeyFormat | undefined;
+        type?: PrivateKeyExportType | undefined;
+        passphrase?: string | Buffer | undefined;
+        encoding?: string | undefined;
+    }
+    interface PublicKeyInput {
+        key: string | Buffer;
+        format?: KeyFormat | undefined;
+        type?: PublicKeyExportType | undefined;
+        encoding?: string | undefined;
+    }
+    /**
+     * Asynchronously generates a new random secret key of the given `length`. The `type` will determine which validations will be performed on the `length`.
+     *
+     * ```js
+     * const {
+     *   generateKey,
+     * } = await import('node:crypto');
+     *
+     * generateKey('hmac', { length: 512 }, (err, key) => {
+     *   if (err) throw err;
+     *   console.log(key.export().toString('hex'));  // 46e..........620
+     * });
+     * ```
+     *
+     * The size of a generated HMAC key should not exceed the block size of the
+     * underlying hash function. See {@link createHmac} for more information.
+     * @since v15.0.0
+     * @param type The intended use of the generated secret key. Currently accepted values are `'hmac'` and `'aes'`.
+     */
+    function generateKey(
+        type: "hmac" | "aes",
+        options: {
+            length: number;
+        },
+        callback: (err: Error | null, key: KeyObject) => void,
+    ): void;
+    /**
+     * Synchronously generates a new random secret key of the given `length`. The `type` will determine which validations will be performed on the `length`.
+     *
+     * ```js
+     * const {
+     *   generateKeySync,
+     * } = await import('node:crypto');
+     *
+     * const key = generateKeySync('hmac', { length: 512 });
+     * console.log(key.export().toString('hex'));  // e89..........41e
+     * ```
+     *
+     * The size of a generated HMAC key should not exceed the block size of the
+     * underlying hash function. See {@link createHmac} for more information.
+     * @since v15.0.0
+     * @param type The intended use of the generated secret key. Currently accepted values are `'hmac'` and `'aes'`.
+     */
+    function generateKeySync(
+        type: "hmac" | "aes",
+        options: {
+            length: number;
+        },
+    ): KeyObject;
+    interface JsonWebKeyInput {
+        key: webcrypto.JsonWebKey;
+        format: "jwk";
+    }
+    /**
+     * Creates and returns a new key object containing a private key. If `key` is a
+     * string or `Buffer`, `format` is assumed to be `'pem'`; otherwise, `key` must be an object with the properties described above.
+     *
+     * If the private key is encrypted, a `passphrase` must be specified. The length
+     * of the passphrase is limited to 1024 bytes.
+     * @since v11.6.0
+     */
+    function createPrivateKey(key: PrivateKeyInput | string | Buffer | JsonWebKeyInput): KeyObject;
+    /**
+     * Creates and returns a new key object containing a public key. If `key` is a
+     * string or `Buffer`, `format` is assumed to be `'pem'`; if `key` is a `KeyObject` with type `'private'`, the public key is derived from the given private key;
+     * otherwise, `key` must be an object with the properties described above.
+     *
+     * If the format is `'pem'`, the `'key'` may also be an X.509 certificate.
+     *
+     * Because public keys can be derived from private keys, a private key may be
+     * passed instead of a public key. In that case, this function behaves as if {@link createPrivateKey} had been called, except that the type of the
+     * returned `KeyObject` will be `'public'` and that the private key cannot be
+     * extracted from the returned `KeyObject`. Similarly, if a `KeyObject` with type `'private'` is given, a new `KeyObject` with type `'public'` will be returned
+     * and it will be impossible to extract the private key from the returned object.
+     * @since v11.6.0
+     */
+    function createPublicKey(key: PublicKeyInput | string | Buffer | KeyObject | JsonWebKeyInput): KeyObject;
+    /**
+     * Creates and returns a new key object containing a secret key for symmetric
+     * encryption or `Hmac`.
+     * @since v11.6.0
+     * @param encoding The string encoding when `key` is a string.
+     */
+    function createSecretKey(key: NodeJS.ArrayBufferView): KeyObject;
+    function createSecretKey(key: string, encoding: BufferEncoding): KeyObject;
+    /**
+     * Creates and returns a `Sign` object that uses the given `algorithm`. Use {@link getHashes} to obtain the names of the available digest algorithms.
+     * Optional `options` argument controls the `stream.Writable` behavior.
+     *
+     * In some cases, a `Sign` instance can be created using the name of a signature
+     * algorithm, such as `'RSA-SHA256'`, instead of a digest algorithm. This will use
+     * the corresponding digest algorithm. This does not work for all signature
+     * algorithms, such as `'ecdsa-with-SHA256'`, so it is best to always use digest
+     * algorithm names.
+     * @since v0.1.92
+     * @param options `stream.Writable` options
+     */
+    // TODO: signing algorithm type
+    function createSign(algorithm: string, options?: stream.WritableOptions): Sign;
+    type DSAEncoding = "der" | "ieee-p1363";
+    interface SigningOptions {
+        /**
+         * @see crypto.constants.RSA_PKCS1_PADDING
+         */
+        padding?: number | undefined;
+        saltLength?: number | undefined;
+        dsaEncoding?: DSAEncoding | undefined;
+        context?: ArrayBuffer | NodeJS.ArrayBufferView | undefined;
+    }
+    interface SignPrivateKeyInput extends PrivateKeyInput, SigningOptions {}
+    interface SignKeyObjectInput extends SigningOptions {
+        key: KeyObject;
+    }
+    interface SignJsonWebKeyInput extends JsonWebKeyInput, SigningOptions {}
+    interface VerifyPublicKeyInput extends PublicKeyInput, SigningOptions {}
+    interface VerifyKeyObjectInput extends SigningOptions {
+        key: KeyObject;
+    }
+    interface VerifyJsonWebKeyInput extends JsonWebKeyInput, SigningOptions {}
+    type KeyLike = string | Buffer | KeyObject;
+    /**
+     * The `Sign` class is a utility for generating signatures. It can be used in one
+     * of two ways:
+     *
+     * * As a writable `stream`, where data to be signed is written and the `sign.sign()` method is used to generate and return the signature, or
+     * * Using the `sign.update()` and `sign.sign()` methods to produce the
+     * signature.
+     *
+     * The {@link createSign} method is used to create `Sign` instances. The
+     * argument is the string name of the hash function to use. `Sign` objects are not
+     * to be created directly using the `new` keyword.
+     *
+     * Example: Using `Sign` and `Verify` objects as streams:
+     *
+     * ```js
+     * const {
+     *   generateKeyPairSync,
+     *   createSign,
+     *   createVerify,
+     * } = await import('node:crypto');
+     *
+     * const { privateKey, publicKey } = generateKeyPairSync('ec', {
+     *   namedCurve: 'sect239k1',
+     * });
+     *
+     * const sign = createSign('SHA256');
+     * sign.write('some data to sign');
+     * sign.end();
+     * const signature = sign.sign(privateKey, 'hex');
+     *
+     * const verify = createVerify('SHA256');
+     * verify.write('some data to sign');
+     * verify.end();
+     * console.log(verify.verify(publicKey, signature, 'hex'));
+     * // Prints: true
+     * ```
+     *
+     * Example: Using the `sign.update()` and `verify.update()` methods:
+     *
+     * ```js
+     * const {
+     *   generateKeyPairSync,
+     *   createSign,
+     *   createVerify,
+     * } = await import('node:crypto');
+     *
+     * const { privateKey, publicKey } = generateKeyPairSync('rsa', {
+     *   modulusLength: 2048,
+     * });
+     *
+     * const sign = createSign('SHA256');
+     * sign.update('some data to sign');
+     * sign.end();
+     * const signature = sign.sign(privateKey);
+     *
+     * const verify = createVerify('SHA256');
+     * verify.update('some data to sign');
+     * verify.end();
+     * console.log(verify.verify(publicKey, signature));
+     * // Prints: true
+     * ```
+     * @since v0.1.92
+     */
+    class Sign extends stream.Writable {
+        private constructor();
+        /**
+         * Updates the `Sign` content with the given `data`, the encoding of which
+         * is given in `inputEncoding`.
+         * If `encoding` is not provided, and the `data` is a string, an
+         * encoding of `'utf8'` is enforced. If `data` is a `Buffer`, `TypedArray`, or`DataView`, then `inputEncoding` is ignored.
+         *
+         * This can be called many times with new data as it is streamed.
+         * @since v0.1.92
+         * @param inputEncoding The `encoding` of the `data` string.
+         */
+        update(data: BinaryLike): this;
+        update(data: string, inputEncoding: Encoding): this;
+        /**
+         * Calculates the signature on all the data passed through using either `sign.update()` or `sign.write()`.
+         *
+         * If `privateKey` is not a `KeyObject`, this function behaves as if `privateKey` had been passed to {@link createPrivateKey}. If it is an
+         * object, the following additional properties can be passed:
+         *
+         * If `outputEncoding` is provided a string is returned; otherwise a `Buffer` is returned.
+         *
+         * The `Sign` object can not be again used after `sign.sign()` method has been
+         * called. Multiple calls to `sign.sign()` will result in an error being thrown.
+         * @since v0.1.92
+         */
+        sign(privateKey: KeyLike | SignKeyObjectInput | SignPrivateKeyInput | SignJsonWebKeyInput): NonSharedBuffer;
+        sign(
+            privateKey: KeyLike | SignKeyObjectInput | SignPrivateKeyInput | SignJsonWebKeyInput,
+            outputFormat: BinaryToTextEncoding,
+        ): string;
+    }
+    /**
+     * Creates and returns a `Verify` object that uses the given algorithm.
+     * Use {@link getHashes} to obtain an array of names of the available
+     * signing algorithms. Optional `options` argument controls the `stream.Writable` behavior.
+     *
+     * In some cases, a `Verify` instance can be created using the name of a signature
+     * algorithm, such as `'RSA-SHA256'`, instead of a digest algorithm. This will use
+     * the corresponding digest algorithm. This does not work for all signature
+     * algorithms, such as `'ecdsa-with-SHA256'`, so it is best to always use digest
+     * algorithm names.
+     * @since v0.1.92
+     * @param options `stream.Writable` options
+     */
+    function createVerify(algorithm: string, options?: stream.WritableOptions): Verify;
+    /**
+     * The `Verify` class is a utility for verifying signatures. It can be used in one
+     * of two ways:
+     *
+     * * As a writable `stream` where written data is used to validate against the
+     * supplied signature, or
+     * * Using the `verify.update()` and `verify.verify()` methods to verify
+     * the signature.
+     *
+     * The {@link createVerify} method is used to create `Verify` instances. `Verify` objects are not to be created directly using the `new` keyword.
+     *
+     * See `Sign` for examples.
+     * @since v0.1.92
+     */
+    class Verify extends stream.Writable {
+        private constructor();
+        /**
+         * Updates the `Verify` content with the given `data`, the encoding of which
+         * is given in `inputEncoding`.
+         * If `inputEncoding` is not provided, and the `data` is a string, an
+         * encoding of `'utf8'` is enforced. If `data` is a `Buffer`, `TypedArray`, or `DataView`, then `inputEncoding` is ignored.
+         *
+         * This can be called many times with new data as it is streamed.
+         * @since v0.1.92
+         * @param inputEncoding The `encoding` of the `data` string.
+         */
+        update(data: BinaryLike): Verify;
+        update(data: string, inputEncoding: Encoding): Verify;
+        /**
+         * Verifies the provided data using the given `object` and `signature`.
+         *
+         * If `object` is not a `KeyObject`, this function behaves as if `object` had been passed to {@link createPublicKey}. If it is an
+         * object, the following additional properties can be passed:
+         *
+         * The `signature` argument is the previously calculated signature for the data, in
+         * the `signatureEncoding`.
+         * If a `signatureEncoding` is specified, the `signature` is expected to be a
+         * string; otherwise `signature` is expected to be a `Buffer`, `TypedArray`, or `DataView`.
+         *
+         * The `verify` object can not be used again after `verify.verify()` has been
+         * called. Multiple calls to `verify.verify()` will result in an error being
+         * thrown.
+         *
+         * Because public keys can be derived from private keys, a private key may
+         * be passed instead of a public key.
+         * @since v0.1.92
+         */
+        verify(
+            object: KeyLike | VerifyKeyObjectInput | VerifyPublicKeyInput | VerifyJsonWebKeyInput,
+            signature: NodeJS.ArrayBufferView,
+        ): boolean;
+        verify(
+            object: KeyLike | VerifyKeyObjectInput | VerifyPublicKeyInput | VerifyJsonWebKeyInput,
+            signature: string,
+            signature_format?: BinaryToTextEncoding,
+        ): boolean;
+    }
+    /**
+     * Creates a `DiffieHellman` key exchange object using the supplied `prime` and an
+     * optional specific `generator`.
+     *
+     * The `generator` argument can be a number, string, or `Buffer`. If `generator` is not specified, the value `2` is used.
+     *
+     * If `primeEncoding` is specified, `prime` is expected to be a string; otherwise
+     * a `Buffer`, `TypedArray`, or `DataView` is expected.
+     *
+     * If `generatorEncoding` is specified, `generator` is expected to be a string;
+     * otherwise a number, `Buffer`, `TypedArray`, or `DataView` is expected.
+     * @since v0.11.12
+     * @param primeEncoding The `encoding` of the `prime` string.
+     * @param [generator=2]
+     * @param generatorEncoding The `encoding` of the `generator` string.
+     */
+    function createDiffieHellman(primeLength: number, generator?: number): DiffieHellman;
+    function createDiffieHellman(
+        prime: ArrayBuffer | NodeJS.ArrayBufferView,
+        generator?: number | ArrayBuffer | NodeJS.ArrayBufferView,
+    ): DiffieHellman;
+    function createDiffieHellman(
+        prime: ArrayBuffer | NodeJS.ArrayBufferView,
+        generator: string,
+        generatorEncoding: BinaryToTextEncoding,
+    ): DiffieHellman;
+    function createDiffieHellman(
+        prime: string,
+        primeEncoding: BinaryToTextEncoding,
+        generator?: number | ArrayBuffer | NodeJS.ArrayBufferView,
+    ): DiffieHellman;
+    function createDiffieHellman(
+        prime: string,
+        primeEncoding: BinaryToTextEncoding,
+        generator: string,
+        generatorEncoding: BinaryToTextEncoding,
+    ): DiffieHellman;
+    /**
+     * The `DiffieHellman` class is a utility for creating Diffie-Hellman key
+     * exchanges.
+     *
+     * Instances of the `DiffieHellman` class can be created using the {@link createDiffieHellman} function.
+     *
+     * ```js
+     * import assert from 'node:assert';
+     *
+     * const {
+     *   createDiffieHellman,
+     * } = await import('node:crypto');
+     *
+     * // Generate Alice's keys...
+     * const alice = createDiffieHellman(2048);
+     * const aliceKey = alice.generateKeys();
+     *
+     * // Generate Bob's keys...
+     * const bob = createDiffieHellman(alice.getPrime(), alice.getGenerator());
+     * const bobKey = bob.generateKeys();
+     *
+     * // Exchange and generate the secret...
+     * const aliceSecret = alice.computeSecret(bobKey);
+     * const bobSecret = bob.computeSecret(aliceKey);
+     *
+     * // OK
+     * assert.strictEqual(aliceSecret.toString('hex'), bobSecret.toString('hex'));
+     * ```
+     * @since v0.5.0
+     */
+    class DiffieHellman {
+        private constructor();
+        /**
+         * Generates private and public Diffie-Hellman key values unless they have been
+         * generated or computed already, and returns
+         * the public key in the specified `encoding`. This key should be
+         * transferred to the other party.
+         * If `encoding` is provided a string is returned; otherwise a `Buffer` is returned.
+         *
+         * This function is a thin wrapper around [`DH_generate_key()`](https://www.openssl.org/docs/man3.0/man3/DH_generate_key.html). In particular,
+         * once a private key has been generated or set, calling this function only updates
+         * the public key but does not generate a new private key.
+         * @since v0.5.0
+         * @param encoding The `encoding` of the return value.
+         */
+        generateKeys(): NonSharedBuffer;
+        generateKeys(encoding: BinaryToTextEncoding): string;
+        /**
+         * Computes the shared secret using `otherPublicKey` as the other
+         * party's public key and returns the computed shared secret. The supplied
+         * key is interpreted using the specified `inputEncoding`, and secret is
+         * encoded using specified `outputEncoding`.
+         * If the `inputEncoding` is not
+         * provided, `otherPublicKey` is expected to be a `Buffer`, `TypedArray`, or `DataView`.
+         *
+         * If `outputEncoding` is given a string is returned; otherwise, a `Buffer` is returned.
+         * @since v0.5.0
+         * @param inputEncoding The `encoding` of an `otherPublicKey` string.
+         * @param outputEncoding The `encoding` of the return value.
+         */
+        computeSecret(
+            otherPublicKey: NodeJS.ArrayBufferView,
+            inputEncoding?: null,
+            outputEncoding?: null,
+        ): NonSharedBuffer;
+        computeSecret(
+            otherPublicKey: string,
+            inputEncoding: BinaryToTextEncoding,
+            outputEncoding?: null,
+        ): NonSharedBuffer;
+        computeSecret(
+            otherPublicKey: NodeJS.ArrayBufferView,
+            inputEncoding: null,
+            outputEncoding: BinaryToTextEncoding,
+        ): string;
+        computeSecret(
+            otherPublicKey: string,
+            inputEncoding: BinaryToTextEncoding,
+            outputEncoding: BinaryToTextEncoding,
+        ): string;
+        /**
+         * Returns the Diffie-Hellman prime in the specified `encoding`.
+         * If `encoding` is provided a string is
+         * returned; otherwise a `Buffer` is returned.
+         * @since v0.5.0
+         * @param encoding The `encoding` of the return value.
+         */
+        getPrime(): NonSharedBuffer;
+        getPrime(encoding: BinaryToTextEncoding): string;
+        /**
+         * Returns the Diffie-Hellman generator in the specified `encoding`.
+         * If `encoding` is provided a string is
+         * returned; otherwise a `Buffer` is returned.
+         * @since v0.5.0
+         * @param encoding The `encoding` of the return value.
+         */
+        getGenerator(): NonSharedBuffer;
+        getGenerator(encoding: BinaryToTextEncoding): string;
+        /**
+         * Returns the Diffie-Hellman public key in the specified `encoding`.
+         * If `encoding` is provided a
+         * string is returned; otherwise a `Buffer` is returned.
+         * @since v0.5.0
+         * @param encoding The `encoding` of the return value.
+         */
+        getPublicKey(): NonSharedBuffer;
+        getPublicKey(encoding: BinaryToTextEncoding): string;
+        /**
+         * Returns the Diffie-Hellman private key in the specified `encoding`.
+         * If `encoding` is provided a
+         * string is returned; otherwise a `Buffer` is returned.
+         * @since v0.5.0
+         * @param encoding The `encoding` of the return value.
+         */
+        getPrivateKey(): NonSharedBuffer;
+        getPrivateKey(encoding: BinaryToTextEncoding): string;
+        /**
+         * Sets the Diffie-Hellman public key. If the `encoding` argument is provided, `publicKey` is expected
+         * to be a string. If no `encoding` is provided, `publicKey` is expected
+         * to be a `Buffer`, `TypedArray`, or `DataView`.
+         * @since v0.5.0
+         * @param encoding The `encoding` of the `publicKey` string.
+         */
+        setPublicKey(publicKey: NodeJS.ArrayBufferView): void;
+        setPublicKey(publicKey: string, encoding: BufferEncoding): void;
+        /**
+         * Sets the Diffie-Hellman private key. If the `encoding` argument is provided,`privateKey` is expected
+         * to be a string. If no `encoding` is provided, `privateKey` is expected
+         * to be a `Buffer`, `TypedArray`, or `DataView`.
+         *
+         * This function does not automatically compute the associated public key. Either `diffieHellman.setPublicKey()` or `diffieHellman.generateKeys()` can be
+         * used to manually provide the public key or to automatically derive it.
+         * @since v0.5.0
+         * @param encoding The `encoding` of the `privateKey` string.
+         */
+        setPrivateKey(privateKey: NodeJS.ArrayBufferView): void;
+        setPrivateKey(privateKey: string, encoding: BufferEncoding): void;
+        /**
+         * A bit field containing any warnings and/or errors resulting from a check
+         * performed during initialization of the `DiffieHellman` object.
+         *
+         * The following values are valid for this property (as defined in `node:constants` module):
+         *
+         * * `DH_CHECK_P_NOT_SAFE_PRIME`
+         * * `DH_CHECK_P_NOT_PRIME`
+         * * `DH_UNABLE_TO_CHECK_GENERATOR`
+         * * `DH_NOT_SUITABLE_GENERATOR`
+         * @since v0.11.12
+         */
+        verifyError: number;
+    }
+    /**
+     * The `DiffieHellmanGroup` class takes a well-known modp group as its argument.
+     * It works the same as `DiffieHellman`, except that it does not allow changing its keys after creation.
+     * In other words, it does not implement `setPublicKey()` or `setPrivateKey()` methods.
+     *
+     * ```js
+     * const { createDiffieHellmanGroup } = await import('node:crypto');
+     * const dh = createDiffieHellmanGroup('modp1');
+     * ```
+     * The name (e.g. `'modp1'`) is taken from [RFC 2412](https://www.rfc-editor.org/rfc/rfc2412.txt) (modp1 and 2) and [RFC 3526](https://www.rfc-editor.org/rfc/rfc3526.txt):
+     * ```bash
+     * $ perl -ne 'print "$1\n" if /"(modp\d+)"/' src/node_crypto_groups.h
+     * modp1  #  768 bits
+     * modp2  # 1024 bits
+     * modp5  # 1536 bits
+     * modp14 # 2048 bits
+     * modp15 # etc.
+     * modp16
+     * modp17
+     * modp18
+     * ```
+     * @since v0.7.5
+     */
+    const DiffieHellmanGroup: DiffieHellmanGroupConstructor;
+    interface DiffieHellmanGroupConstructor {
+        new(name: string): DiffieHellmanGroup;
+        (name: string): DiffieHellmanGroup;
+        readonly prototype: DiffieHellmanGroup;
+    }
+    type DiffieHellmanGroup = Omit<DiffieHellman, "setPublicKey" | "setPrivateKey">;
+    /**
+     * Creates a predefined `DiffieHellmanGroup` key exchange object. The
+     * supported groups are listed in the documentation for `DiffieHellmanGroup`.
+     *
+     * The returned object mimics the interface of objects created by {@link createDiffieHellman}, but will not allow changing
+     * the keys (with `diffieHellman.setPublicKey()`, for example). The
+     * advantage of using this method is that the parties do not have to
+     * generate nor exchange a group modulus beforehand, saving both processor
+     * and communication time.
+     *
+     * Example (obtaining a shared secret):
+     *
+     * ```js
+     * const {
+     *   getDiffieHellman,
+     * } = await import('node:crypto');
+     * const alice = getDiffieHellman('modp14');
+     * const bob = getDiffieHellman('modp14');
+     *
+     * alice.generateKeys();
+     * bob.generateKeys();
+     *
+     * const aliceSecret = alice.computeSecret(bob.getPublicKey(), null, 'hex');
+     * const bobSecret = bob.computeSecret(alice.getPublicKey(), null, 'hex');
+     *
+     * // aliceSecret and bobSecret should be the same
+     * console.log(aliceSecret === bobSecret);
+     * ```
+     * @since v0.7.5
+     */
+    function getDiffieHellman(groupName: string): DiffieHellmanGroup;
+    /**
+     * An alias for {@link getDiffieHellman}
+     * @since v0.9.3
+     */
+    function createDiffieHellmanGroup(name: string): DiffieHellmanGroup;
+    /**
+     * Provides an asynchronous Password-Based Key Derivation Function 2 (PBKDF2)
+     * implementation. A selected HMAC digest algorithm specified by `digest` is
+     * applied to derive a key of the requested byte length (`keylen`) from the `password`, `salt` and `iterations`.
+     *
+     * The supplied `callback` function is called with two arguments: `err` and `derivedKey`. If an error occurs while deriving the key, `err` will be set;
+     * otherwise `err` will be `null`. By default, the successfully generated `derivedKey` will be passed to the callback as a `Buffer`. An error will be
+     * thrown if any of the input arguments specify invalid values or types.
+     *
+     * The `iterations` argument must be a number set as high as possible. The
+     * higher the number of iterations, the more secure the derived key will be,
+     * but will take a longer amount of time to complete.
+     *
+     * The `salt` should be as unique as possible. It is recommended that a salt is
+     * random and at least 16 bytes long. See [NIST SP 800-132](https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf) for details.
+     *
+     * When passing strings for `password` or `salt`, please consider `caveats when using strings as inputs to cryptographic APIs`.
+     *
+     * ```js
+     * const {
+     *   pbkdf2,
+     * } = await import('node:crypto');
+     *
+     * pbkdf2('secret', 'salt', 100000, 64, 'sha512', (err, derivedKey) => {
+     *   if (err) throw err;
+     *   console.log(derivedKey.toString('hex'));  // '3745e48...08d59ae'
+     * });
+     * ```
+     *
+     * An array of supported digest functions can be retrieved using {@link getHashes}.
+     *
+     * This API uses libuv's threadpool, which can have surprising and
+     * negative performance implications for some applications; see the `UV_THREADPOOL_SIZE` documentation for more information.
+     * @since v0.5.5
+     */
+    function pbkdf2(
+        password: BinaryLike,
+        salt: BinaryLike,
+        iterations: number,
+        keylen: number,
+        digest: string,
+        callback: (err: Error | null, derivedKey: NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Provides a synchronous Password-Based Key Derivation Function 2 (PBKDF2)
+     * implementation. A selected HMAC digest algorithm specified by `digest` is
+     * applied to derive a key of the requested byte length (`keylen`) from the `password`, `salt` and `iterations`.
+     *
+     * If an error occurs an `Error` will be thrown, otherwise the derived key will be
+     * returned as a `Buffer`.
+     *
+     * The `iterations` argument must be a number set as high as possible. The
+     * higher the number of iterations, the more secure the derived key will be,
+     * but will take a longer amount of time to complete.
+     *
+     * The `salt` should be as unique as possible. It is recommended that a salt is
+     * random and at least 16 bytes long. See [NIST SP 800-132](https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf) for details.
+     *
+     * When passing strings for `password` or `salt`, please consider `caveats when using strings as inputs to cryptographic APIs`.
+     *
+     * ```js
+     * const {
+     *   pbkdf2Sync,
+     * } = await import('node:crypto');
+     *
+     * const key = pbkdf2Sync('secret', 'salt', 100000, 64, 'sha512');
+     * console.log(key.toString('hex'));  // '3745e48...08d59ae'
+     * ```
+     *
+     * An array of supported digest functions can be retrieved using {@link getHashes}.
+     * @since v0.9.3
+     */
+    function pbkdf2Sync(
+        password: BinaryLike,
+        salt: BinaryLike,
+        iterations: number,
+        keylen: number,
+        digest: string,
+    ): NonSharedBuffer;
+    /**
+     * Generates cryptographically strong pseudorandom data. The `size` argument
+     * is a number indicating the number of bytes to generate.
+     *
+     * If a `callback` function is provided, the bytes are generated asynchronously
+     * and the `callback` function is invoked with two arguments: `err` and `buf`.
+     * If an error occurs, `err` will be an `Error` object; otherwise it is `null`. The `buf` argument is a `Buffer` containing the generated bytes.
+     *
+     * ```js
+     * // Asynchronous
+     * const {
+     *   randomBytes,
+     * } = await import('node:crypto');
+     *
+     * randomBytes(256, (err, buf) => {
+     *   if (err) throw err;
+     *   console.log(`${buf.length} bytes of random data: ${buf.toString('hex')}`);
+     * });
+     * ```
+     *
+     * If the `callback` function is not provided, the random bytes are generated
+     * synchronously and returned as a `Buffer`. An error will be thrown if
+     * there is a problem generating the bytes.
+     *
+     * ```js
+     * // Synchronous
+     * const {
+     *   randomBytes,
+     * } = await import('node:crypto');
+     *
+     * const buf = randomBytes(256);
+     * console.log(
+     *   `${buf.length} bytes of random data: ${buf.toString('hex')}`);
+     * ```
+     *
+     * The `crypto.randomBytes()` method will not complete until there is
+     * sufficient entropy available.
+     * This should normally never take longer than a few milliseconds. The only time
+     * when generating the random bytes may conceivably block for a longer period of
+     * time is right after boot, when the whole system is still low on entropy.
+     *
+     * This API uses libuv's threadpool, which can have surprising and
+     * negative performance implications for some applications; see the `UV_THREADPOOL_SIZE` documentation for more information.
+     *
+     * The asynchronous version of `crypto.randomBytes()` is carried out in a single
+     * threadpool request. To minimize threadpool task length variation, partition
+     * large `randomBytes` requests when doing so as part of fulfilling a client
+     * request.
+     * @since v0.5.8
+     * @param size The number of bytes to generate. The `size` must not be larger than `2**31 - 1`.
+     * @return if the `callback` function is not provided.
+     */
+    function randomBytes(size: number): NonSharedBuffer;
+    function randomBytes(size: number, callback: (err: Error | null, buf: NonSharedBuffer) => void): void;
+    function pseudoRandomBytes(size: number): NonSharedBuffer;
+    function pseudoRandomBytes(size: number, callback: (err: Error | null, buf: NonSharedBuffer) => void): void;
+    /**
+     * Return a random integer `n` such that `min <= n < max`.  This
+     * implementation avoids [modulo bias](https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle#Modulo_bias).
+     *
+     * The range (`max - min`) must be less than 2**48. `min` and `max` must
+     * be [safe integers](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/isSafeInteger).
+     *
+     * If the `callback` function is not provided, the random integer is
+     * generated synchronously.
+     *
+     * ```js
+     * // Asynchronous
+     * const {
+     *   randomInt,
+     * } = await import('node:crypto');
+     *
+     * randomInt(3, (err, n) => {
+     *   if (err) throw err;
+     *   console.log(`Random number chosen from (0, 1, 2): ${n}`);
+     * });
+     * ```
+     *
+     * ```js
+     * // Synchronous
+     * const {
+     *   randomInt,
+     * } = await import('node:crypto');
+     *
+     * const n = randomInt(3);
+     * console.log(`Random number chosen from (0, 1, 2): ${n}`);
+     * ```
+     *
+     * ```js
+     * // With `min` argument
+     * const {
+     *   randomInt,
+     * } = await import('node:crypto');
+     *
+     * const n = randomInt(1, 7);
+     * console.log(`The dice rolled: ${n}`);
+     * ```
+     * @since v14.10.0, v12.19.0
+     * @param [min=0] Start of random range (inclusive).
+     * @param max End of random range (exclusive).
+     * @param callback `function(err, n) {}`.
+     */
+    function randomInt(max: number): number;
+    function randomInt(min: number, max: number): number;
+    function randomInt(max: number, callback: (err: Error | null, value: number) => void): void;
+    function randomInt(min: number, max: number, callback: (err: Error | null, value: number) => void): void;
+    /**
+     * Synchronous version of {@link randomFill}.
+     *
+     * ```js
+     * import { Buffer } from 'node:buffer';
+     * const { randomFillSync } = await import('node:crypto');
+     *
+     * const buf = Buffer.alloc(10);
+     * console.log(randomFillSync(buf).toString('hex'));
+     *
+     * randomFillSync(buf, 5);
+     * console.log(buf.toString('hex'));
+     *
+     * // The above is equivalent to the following:
+     * randomFillSync(buf, 5, 5);
+     * console.log(buf.toString('hex'));
+     * ```
+     *
+     * Any `ArrayBuffer`, `TypedArray` or `DataView` instance may be passed as`buffer`.
+     *
+     * ```js
+     * import { Buffer } from 'node:buffer';
+     * const { randomFillSync } = await import('node:crypto');
+     *
+     * const a = new Uint32Array(10);
+     * console.log(Buffer.from(randomFillSync(a).buffer,
+     *                         a.byteOffset, a.byteLength).toString('hex'));
+     *
+     * const b = new DataView(new ArrayBuffer(10));
+     * console.log(Buffer.from(randomFillSync(b).buffer,
+     *                         b.byteOffset, b.byteLength).toString('hex'));
+     *
+     * const c = new ArrayBuffer(10);
+     * console.log(Buffer.from(randomFillSync(c)).toString('hex'));
+     * ```
+     * @since v7.10.0, v6.13.0
+     * @param buffer Must be supplied. The size of the provided `buffer` must not be larger than `2**31 - 1`.
+     * @param [offset=0]
+     * @param [size=buffer.length - offset]
+     * @return The object passed as `buffer` argument.
+     */
+    function randomFillSync<T extends NodeJS.ArrayBufferView>(buffer: T, offset?: number, size?: number): T;
+    /**
+     * This function is similar to {@link randomBytes} but requires the first
+     * argument to be a `Buffer` that will be filled. It also
+     * requires that a callback is passed in.
+     *
+     * If the `callback` function is not provided, an error will be thrown.
+     *
+     * ```js
+     * import { Buffer } from 'node:buffer';
+     * const { randomFill } = await import('node:crypto');
+     *
+     * const buf = Buffer.alloc(10);
+     * randomFill(buf, (err, buf) => {
+     *   if (err) throw err;
+     *   console.log(buf.toString('hex'));
+     * });
+     *
+     * randomFill(buf, 5, (err, buf) => {
+     *   if (err) throw err;
+     *   console.log(buf.toString('hex'));
+     * });
+     *
+     * // The above is equivalent to the following:
+     * randomFill(buf, 5, 5, (err, buf) => {
+     *   if (err) throw err;
+     *   console.log(buf.toString('hex'));
+     * });
+     * ```
+     *
+     * Any `ArrayBuffer`, `TypedArray`, or `DataView` instance may be passed as `buffer`.
+     *
+     * While this includes instances of `Float32Array` and `Float64Array`, this
+     * function should not be used to generate random floating-point numbers. The
+     * result may contain `+Infinity`, `-Infinity`, and `NaN`, and even if the array
+     * contains finite numbers only, they are not drawn from a uniform random
+     * distribution and have no meaningful lower or upper bounds.
+     *
+     * ```js
+     * import { Buffer } from 'node:buffer';
+     * const { randomFill } = await import('node:crypto');
+     *
+     * const a = new Uint32Array(10);
+     * randomFill(a, (err, buf) => {
+     *   if (err) throw err;
+     *   console.log(Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength)
+     *     .toString('hex'));
+     * });
+     *
+     * const b = new DataView(new ArrayBuffer(10));
+     * randomFill(b, (err, buf) => {
+     *   if (err) throw err;
+     *   console.log(Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength)
+     *     .toString('hex'));
+     * });
+     *
+     * const c = new ArrayBuffer(10);
+     * randomFill(c, (err, buf) => {
+     *   if (err) throw err;
+     *   console.log(Buffer.from(buf).toString('hex'));
+     * });
+     * ```
+     *
+     * This API uses libuv's threadpool, which can have surprising and
+     * negative performance implications for some applications; see the `UV_THREADPOOL_SIZE` documentation for more information.
+     *
+     * The asynchronous version of `crypto.randomFill()` is carried out in a single
+     * threadpool request. To minimize threadpool task length variation, partition
+     * large `randomFill` requests when doing so as part of fulfilling a client
+     * request.
+     * @since v7.10.0, v6.13.0
+     * @param buffer Must be supplied. The size of the provided `buffer` must not be larger than `2**31 - 1`.
+     * @param [offset=0]
+     * @param [size=buffer.length - offset]
+     * @param callback `function(err, buf) {}`.
+     */
+    function randomFill<T extends NodeJS.ArrayBufferView>(
+        buffer: T,
+        callback: (err: Error | null, buf: T) => void,
+    ): void;
+    function randomFill<T extends NodeJS.ArrayBufferView>(
+        buffer: T,
+        offset: number,
+        callback: (err: Error | null, buf: T) => void,
+    ): void;
+    function randomFill<T extends NodeJS.ArrayBufferView>(
+        buffer: T,
+        offset: number,
+        size: number,
+        callback: (err: Error | null, buf: T) => void,
+    ): void;
+    interface ScryptOptions {
+        cost?: number | undefined;
+        blockSize?: number | undefined;
+        parallelization?: number | undefined;
+        N?: number | undefined;
+        r?: number | undefined;
+        p?: number | undefined;
+        maxmem?: number | undefined;
+    }
+    /**
+     * Provides an asynchronous [scrypt](https://en.wikipedia.org/wiki/Scrypt) implementation. Scrypt is a password-based
+     * key derivation function that is designed to be expensive computationally and
+     * memory-wise in order to make brute-force attacks unrewarding.
+     *
+     * The `salt` should be as unique as possible. It is recommended that a salt is
+     * random and at least 16 bytes long. See [NIST SP 800-132](https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf) for details.
+     *
+     * When passing strings for `password` or `salt`, please consider `caveats when using strings as inputs to cryptographic APIs`.
+     *
+     * The `callback` function is called with two arguments: `err` and `derivedKey`. `err` is an exception object when key derivation fails, otherwise `err` is `null`. `derivedKey` is passed to the
+     * callback as a `Buffer`.
+     *
+     * An exception is thrown when any of the input arguments specify invalid values
+     * or types.
+     *
+     * ```js
+     * const {
+     *   scrypt,
+     * } = await import('node:crypto');
+     *
+     * // Using the factory defaults.
+     * scrypt('password', 'salt', 64, (err, derivedKey) => {
+     *   if (err) throw err;
+     *   console.log(derivedKey.toString('hex'));  // '3745e48...08d59ae'
+     * });
+     * // Using a custom N parameter. Must be a power of two.
+     * scrypt('password', 'salt', 64, { N: 1024 }, (err, derivedKey) => {
+     *   if (err) throw err;
+     *   console.log(derivedKey.toString('hex'));  // '3745e48...aa39b34'
+     * });
+     * ```
+     * @since v10.5.0
+     */
+    function scrypt(
+        password: BinaryLike,
+        salt: BinaryLike,
+        keylen: number,
+        callback: (err: Error | null, derivedKey: NonSharedBuffer) => void,
+    ): void;
+    function scrypt(
+        password: BinaryLike,
+        salt: BinaryLike,
+        keylen: number,
+        options: ScryptOptions,
+        callback: (err: Error | null, derivedKey: NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Provides a synchronous [scrypt](https://en.wikipedia.org/wiki/Scrypt) implementation. Scrypt is a password-based
+     * key derivation function that is designed to be expensive computationally and
+     * memory-wise in order to make brute-force attacks unrewarding.
+     *
+     * The `salt` should be as unique as possible. It is recommended that a salt is
+     * random and at least 16 bytes long. See [NIST SP 800-132](https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf) for details.
+     *
+     * When passing strings for `password` or `salt`, please consider `caveats when using strings as inputs to cryptographic APIs`.
+     *
+     * An exception is thrown when key derivation fails, otherwise the derived key is
+     * returned as a `Buffer`.
+     *
+     * An exception is thrown when any of the input arguments specify invalid values
+     * or types.
+     *
+     * ```js
+     * const {
+     *   scryptSync,
+     * } = await import('node:crypto');
+     * // Using the factory defaults.
+     *
+     * const key1 = scryptSync('password', 'salt', 64);
+     * console.log(key1.toString('hex'));  // '3745e48...08d59ae'
+     * // Using a custom N parameter. Must be a power of two.
+     * const key2 = scryptSync('password', 'salt', 64, { N: 1024 });
+     * console.log(key2.toString('hex'));  // '3745e48...aa39b34'
+     * ```
+     * @since v10.5.0
+     */
+    function scryptSync(
+        password: BinaryLike,
+        salt: BinaryLike,
+        keylen: number,
+        options?: ScryptOptions,
+    ): NonSharedBuffer;
+    interface RsaPublicKey {
+        key: KeyLike;
+        padding?: number | undefined;
+    }
+    interface RsaPrivateKey {
+        key: KeyLike;
+        passphrase?: string | undefined;
+        /**
+         * @default 'sha1'
+         */
+        oaepHash?: string | undefined;
+        oaepLabel?: NodeJS.TypedArray | undefined;
+        padding?: number | undefined;
+    }
+    /**
+     * Encrypts the content of `buffer` with `key` and returns a new `Buffer` with encrypted content. The returned data can be decrypted using
+     * the corresponding private key, for example using {@link privateDecrypt}.
+     *
+     * If `key` is not a `KeyObject`, this function behaves as if `key` had been passed to {@link createPublicKey}. If it is an
+     * object, the `padding` property can be passed. Otherwise, this function uses `RSA_PKCS1_OAEP_PADDING`.
+     *
+     * Because RSA public keys can be derived from private keys, a private key may
+     * be passed instead of a public key.
+     * @since v0.11.14
+     */
+    function publicEncrypt(
+        key: RsaPublicKey | RsaPrivateKey | KeyLike,
+        buffer: NodeJS.ArrayBufferView | string,
+    ): NonSharedBuffer;
+    /**
+     * Decrypts `buffer` with `key`.`buffer` was previously encrypted using
+     * the corresponding private key, for example using {@link privateEncrypt}.
+     *
+     * If `key` is not a `KeyObject`, this function behaves as if `key` had been passed to {@link createPublicKey}. If it is an
+     * object, the `padding` property can be passed. Otherwise, this function uses `RSA_PKCS1_PADDING`.
+     *
+     * Because RSA public keys can be derived from private keys, a private key may
+     * be passed instead of a public key.
+     * @since v1.1.0
+     */
+    function publicDecrypt(
+        key: RsaPublicKey | RsaPrivateKey | KeyLike,
+        buffer: NodeJS.ArrayBufferView | string,
+    ): NonSharedBuffer;
+    /**
+     * Decrypts `buffer` with `privateKey`. `buffer` was previously encrypted using
+     * the corresponding public key, for example using {@link publicEncrypt}.
+     *
+     * If `privateKey` is not a `KeyObject`, this function behaves as if `privateKey` had been passed to {@link createPrivateKey}. If it is an
+     * object, the `padding` property can be passed. Otherwise, this function uses `RSA_PKCS1_OAEP_PADDING`.
+     * @since v0.11.14
+     */
+    function privateDecrypt(
+        privateKey: RsaPrivateKey | KeyLike,
+        buffer: NodeJS.ArrayBufferView | string,
+    ): NonSharedBuffer;
+    /**
+     * Encrypts `buffer` with `privateKey`. The returned data can be decrypted using
+     * the corresponding public key, for example using {@link publicDecrypt}.
+     *
+     * If `privateKey` is not a `KeyObject`, this function behaves as if `privateKey` had been passed to {@link createPrivateKey}. If it is an
+     * object, the `padding` property can be passed. Otherwise, this function uses `RSA_PKCS1_PADDING`.
+     * @since v1.1.0
+     */
+    function privateEncrypt(
+        privateKey: RsaPrivateKey | KeyLike,
+        buffer: NodeJS.ArrayBufferView | string,
+    ): NonSharedBuffer;
+    /**
+     * ```js
+     * const {
+     *   getCiphers,
+     * } = await import('node:crypto');
+     *
+     * console.log(getCiphers()); // ['aes-128-cbc', 'aes-128-ccm', ...]
+     * ```
+     * @since v0.9.3
+     * @return An array with the names of the supported cipher algorithms.
+     */
+    function getCiphers(): string[];
+    /**
+     * ```js
+     * const {
+     *   getCurves,
+     * } = await import('node:crypto');
+     *
+     * console.log(getCurves()); // ['Oakley-EC2N-3', 'Oakley-EC2N-4', ...]
+     * ```
+     * @since v2.3.0
+     * @return An array with the names of the supported elliptic curves.
+     */
+    function getCurves(): string[];
+    /**
+     * @since v10.0.0
+     * @return `1` if and only if a FIPS compliant crypto provider is currently in use, `0` otherwise. A future semver-major release may change the return type of this API to a {boolean}.
+     */
+    function getFips(): 1 | 0;
+    /**
+     * Enables the FIPS compliant crypto provider in a FIPS-enabled Node.js build.
+     * Throws an error if FIPS mode is not available.
+     * @since v10.0.0
+     * @param bool `true` to enable FIPS mode.
+     */
+    function setFips(bool: boolean): void;
+    /**
+     * ```js
+     * const {
+     *   getHashes,
+     * } = await import('node:crypto');
+     *
+     * console.log(getHashes()); // ['DSA', 'DSA-SHA', 'DSA-SHA1', ...]
+     * ```
+     * @since v0.9.3
+     * @return An array of the names of the supported hash algorithms, such as `'RSA-SHA256'`. Hash algorithms are also called "digest" algorithms.
+     */
+    function getHashes(): string[];
+    /**
+     * The `ECDH` class is a utility for creating Elliptic Curve Diffie-Hellman (ECDH)
+     * key exchanges.
+     *
+     * Instances of the `ECDH` class can be created using the {@link createECDH} function.
+     *
+     * ```js
+     * import assert from 'node:assert';
+     *
+     * const {
+     *   createECDH,
+     * } = await import('node:crypto');
+     *
+     * // Generate Alice's keys...
+     * const alice = createECDH('secp521r1');
+     * const aliceKey = alice.generateKeys();
+     *
+     * // Generate Bob's keys...
+     * const bob = createECDH('secp521r1');
+     * const bobKey = bob.generateKeys();
+     *
+     * // Exchange and generate the secret...
+     * const aliceSecret = alice.computeSecret(bobKey);
+     * const bobSecret = bob.computeSecret(aliceKey);
+     *
+     * assert.strictEqual(aliceSecret.toString('hex'), bobSecret.toString('hex'));
+     * // OK
+     * ```
+     * @since v0.11.14
+     */
+    class ECDH {
+        private constructor();
+        /**
+         * Converts the EC Diffie-Hellman public key specified by `key` and `curve` to the
+         * format specified by `format`. The `format` argument specifies point encoding
+         * and can be `'compressed'`, `'uncompressed'` or `'hybrid'`. The supplied key is
+         * interpreted using the specified `inputEncoding`, and the returned key is encoded
+         * using the specified `outputEncoding`.
+         *
+         * Use {@link getCurves} to obtain a list of available curve names.
+         * On recent OpenSSL releases, `openssl ecparam -list_curves` will also display
+         * the name and description of each available elliptic curve.
+         *
+         * If `format` is not specified the point will be returned in `'uncompressed'` format.
+         *
+         * If the `inputEncoding` is not provided, `key` is expected to be a `Buffer`, `TypedArray`, or `DataView`.
+         *
+         * Example (uncompressing a key):
+         *
+         * ```js
+         * const {
+         *   createECDH,
+         *   ECDH,
+         * } = await import('node:crypto');
+         *
+         * const ecdh = createECDH('secp256k1');
+         * ecdh.generateKeys();
+         *
+         * const compressedKey = ecdh.getPublicKey('hex', 'compressed');
+         *
+         * const uncompressedKey = ECDH.convertKey(compressedKey,
+         *                                         'secp256k1',
+         *                                         'hex',
+         *                                         'hex',
+         *                                         'uncompressed');
+         *
+         * // The converted key and the uncompressed public key should be the same
+         * console.log(uncompressedKey === ecdh.getPublicKey('hex'));
+         * ```
+         * @since v10.0.0
+         * @param inputEncoding The `encoding` of the `key` string.
+         * @param outputEncoding The `encoding` of the return value.
+         * @param [format='uncompressed']
+         */
+        static convertKey(
+            key: BinaryLike,
+            curve: string,
+            inputEncoding?: BinaryToTextEncoding,
+            outputEncoding?: "latin1" | "hex" | "base64" | "base64url",
+            format?: "uncompressed" | "compressed" | "hybrid",
+        ): NonSharedBuffer | string;
+        /**
+         * Generates private and public EC Diffie-Hellman key values, and returns
+         * the public key in the specified `format` and `encoding`. This key should be
+         * transferred to the other party.
+         *
+         * The `format` argument specifies point encoding and can be `'compressed'` or `'uncompressed'`. If `format` is not specified, the point will be returned in`'uncompressed'` format.
+         *
+         * If `encoding` is provided a string is returned; otherwise a `Buffer` is returned.
+         * @since v0.11.14
+         * @param encoding The `encoding` of the return value.
+         * @param [format='uncompressed']
+         */
+        generateKeys(): NonSharedBuffer;
+        generateKeys(encoding: BinaryToTextEncoding, format?: ECDHKeyFormat): string;
+        /**
+         * Computes the shared secret using `otherPublicKey` as the other
+         * party's public key and returns the computed shared secret. The supplied
+         * key is interpreted using specified `inputEncoding`, and the returned secret
+         * is encoded using the specified `outputEncoding`.
+         * If the `inputEncoding` is not
+         * provided, `otherPublicKey` is expected to be a `Buffer`, `TypedArray`, or `DataView`.
+         *
+         * If `outputEncoding` is given a string will be returned; otherwise a `Buffer` is returned.
+         *
+         * `ecdh.computeSecret` will throw an`ERR_CRYPTO_ECDH_INVALID_PUBLIC_KEY` error when `otherPublicKey` lies outside of the elliptic curve. Since `otherPublicKey` is
+         * usually supplied from a remote user over an insecure network,
+         * be sure to handle this exception accordingly.
+         * @since v0.11.14
+         * @param inputEncoding The `encoding` of the `otherPublicKey` string.
+         * @param outputEncoding The `encoding` of the return value.
+         */
+        computeSecret(otherPublicKey: NodeJS.ArrayBufferView): NonSharedBuffer;
+        computeSecret(otherPublicKey: string, inputEncoding: BinaryToTextEncoding): NonSharedBuffer;
+        computeSecret(otherPublicKey: NodeJS.ArrayBufferView, outputEncoding: BinaryToTextEncoding): string;
+        computeSecret(
+            otherPublicKey: string,
+            inputEncoding: BinaryToTextEncoding,
+            outputEncoding: BinaryToTextEncoding,
+        ): string;
+        /**
+         * If `encoding` is specified, a string is returned; otherwise a `Buffer` is
+         * returned.
+         * @since v0.11.14
+         * @param encoding The `encoding` of the return value.
+         * @return The EC Diffie-Hellman in the specified `encoding`.
+         */
+        getPrivateKey(): NonSharedBuffer;
+        getPrivateKey(encoding: BinaryToTextEncoding): string;
+        /**
+         * The `format` argument specifies point encoding and can be `'compressed'` or `'uncompressed'`. If `format` is not specified the point will be returned in`'uncompressed'` format.
+         *
+         * If `encoding` is specified, a string is returned; otherwise a `Buffer` is
+         * returned.
+         * @since v0.11.14
+         * @param encoding The `encoding` of the return value.
+         * @param [format='uncompressed']
+         * @return The EC Diffie-Hellman public key in the specified `encoding` and `format`.
+         */
+        getPublicKey(encoding?: null, format?: ECDHKeyFormat): NonSharedBuffer;
+        getPublicKey(encoding: BinaryToTextEncoding, format?: ECDHKeyFormat): string;
+        /**
+         * Sets the EC Diffie-Hellman private key.
+         * If `encoding` is provided, `privateKey` is expected
+         * to be a string; otherwise `privateKey` is expected to be a `Buffer`, `TypedArray`, or `DataView`.
+         *
+         * If `privateKey` is not valid for the curve specified when the `ECDH` object was
+         * created, an error is thrown. Upon setting the private key, the associated
+         * public point (key) is also generated and set in the `ECDH` object.
+         * @since v0.11.14
+         * @param encoding The `encoding` of the `privateKey` string.
+         */
+        setPrivateKey(privateKey: NodeJS.ArrayBufferView): void;
+        setPrivateKey(privateKey: string, encoding: BinaryToTextEncoding): void;
+    }
+    /**
+     * Creates an Elliptic Curve Diffie-Hellman (`ECDH`) key exchange object using a
+     * predefined curve specified by the `curveName` string. Use {@link getCurves} to obtain a list of available curve names. On recent
+     * OpenSSL releases, `openssl ecparam -list_curves` will also display the name
+     * and description of each available elliptic curve.
+     * @since v0.11.14
+     */
+    function createECDH(curveName: string): ECDH;
+    /**
+     * This function compares the underlying bytes that represent the given `ArrayBuffer`, `TypedArray`, or `DataView` instances using a constant-time
+     * algorithm.
+     *
+     * This function does not leak timing information that
+     * would allow an attacker to guess one of the values. This is suitable for
+     * comparing HMAC digests or secret values like authentication cookies or [capability urls](https://www.w3.org/TR/capability-urls/).
+     *
+     * `a` and `b` must both be `Buffer`s, `TypedArray`s, or `DataView`s, and they
+     * must have the same byte length. An error is thrown if `a` and `b` have
+     * different byte lengths.
+     *
+     * If at least one of `a` and `b` is a `TypedArray` with more than one byte per
+     * entry, such as `Uint16Array`, the result will be computed using the platform
+     * byte order.
+     *
+     * **When both of the inputs are `Float32Array`s or `Float64Array`s, this function might return unexpected results due to IEEE 754**
+     * **encoding of floating-point numbers. In particular, neither `x === y` nor `Object.is(x, y)` implies that the byte representations of two floating-point**
+     * **numbers `x` and `y` are equal.**
+     *
+     * Use of `crypto.timingSafeEqual` does not guarantee that the _surrounding_ code
+     * is timing-safe. Care should be taken to ensure that the surrounding code does
+     * not introduce timing vulnerabilities.
+     * @since v6.6.0
+     */
+    function timingSafeEqual(a: NodeJS.ArrayBufferView, b: NodeJS.ArrayBufferView): boolean;
+    interface DHKeyPairOptions extends KeyPairExportOptions<"spki", "pkcs8"> {
+        /**
+         * The prime parameter
+         */
+        prime?: Buffer | undefined;
+        /**
+         * Prime length in bits
+         */
+        primeLength?: number | undefined;
+        /**
+         * Custom generator
+         * @default 2
+         */
+        generator?: number | undefined;
+        /**
+         * Diffie-Hellman group name
+         * @see {@link getDiffieHellman}
+         */
+        groupName?: string | undefined;
+    }
+    interface DSAKeyPairOptions extends KeyPairExportOptions<"spki", "pkcs8"> {
+        /**
+         * Key size in bits
+         */
+        modulusLength: number;
+        /**
+         * Size of q in bits
+         */
+        divisorLength: number;
+    }
+    interface ECKeyPairOptions extends KeyPairExportOptions<"spki", "pkcs8" | "sec1"> {
+        /**
+         * Name of the curve to use
+         */
+        namedCurve: string;
+        /**
+         * Must be `'named'` or `'explicit'`
+         * @default 'named'
+         */
+        paramEncoding?: "explicit" | "named" | undefined;
+    }
+    interface ED25519KeyPairOptions extends KeyPairExportOptions<"spki", "pkcs8"> {}
+    interface ED448KeyPairOptions extends KeyPairExportOptions<"spki", "pkcs8"> {}
+    interface MLDSAKeyPairOptions extends KeyPairExportOptions<"spki", "pkcs8"> {}
+    interface MLKEMKeyPairOptions extends KeyPairExportOptions<"spki", "pkcs8"> {}
+    interface RSAPSSKeyPairOptions extends KeyPairExportOptions<"spki", "pkcs8"> {
+        /**
+         * Key size in bits
+         */
+        modulusLength: number;
+        /**
+         * Public exponent
+         * @default 0x10001
+         */
+        publicExponent?: number | undefined;
+        /**
+         * Name of the message digest
+         */
+        hashAlgorithm?: string | undefined;
+        /**
+         * Name of the message digest used by MGF1
+         */
+        mgf1HashAlgorithm?: string | undefined;
+        /**
+         * Minimal salt length in bytes
+         */
+        saltLength?: string | undefined;
+    }
+    interface RSAKeyPairOptions extends KeyPairExportOptions<"pkcs1" | "spki", "pkcs1" | "pkcs8"> {
+        /**
+         * Key size in bits
+         */
+        modulusLength: number;
+        /**
+         * Public exponent
+         * @default 0x10001
+         */
+        publicExponent?: number | undefined;
+    }
+    interface SLHDSAKeyPairOptions extends KeyPairExportOptions<"spki", "pkcs8"> {}
+    interface X25519KeyPairOptions extends KeyPairExportOptions<"spki", "pkcs8"> {}
+    interface X448KeyPairOptions extends KeyPairExportOptions<"spki", "pkcs8"> {}
+    /**
+     * Generates a new asymmetric key pair of the given `type`. See the
+     * supported [asymmetric key types](https://nodejs.org/docs/latest-v25.x/api/crypto.html#asymmetric-key-types).
+     *
+     * If a `publicKeyEncoding` or `privateKeyEncoding` was specified, this function
+     * behaves as if `keyObject.export()` had been called on its result. Otherwise,
+     * the respective part of the key is returned as a `KeyObject`.
+     *
+     * When encoding public keys, it is recommended to use `'spki'`. When encoding
+     * private keys, it is recommended to use `'pkcs8'` with a strong passphrase,
+     * and to keep the passphrase confidential.
+     *
+     * ```js
+     * const {
+     *   generateKeyPairSync,
+     * } = await import('node:crypto');
+     *
+     * const {
+     *   publicKey,
+     *   privateKey,
+     * } = generateKeyPairSync('rsa', {
+     *   modulusLength: 4096,
+     *   publicKeyEncoding: {
+     *     type: 'spki',
+     *     format: 'pem',
+     *   },
+     *   privateKeyEncoding: {
+     *     type: 'pkcs8',
+     *     format: 'pem',
+     *     cipher: 'aes-256-cbc',
+     *     passphrase: 'top secret',
+     *   },
+     * });
+     * ```
+     *
+     * The return value `{ publicKey, privateKey }` represents the generated key pair.
+     * When PEM encoding was selected, the respective key will be a string, otherwise
+     * it will be a buffer containing the data encoded as DER.
+     * @since v10.12.0
+     * @param type The asymmetric key type to generate. See the
+     * supported [asymmetric key types](https://nodejs.org/docs/latest-v25.x/api/crypto.html#asymmetric-key-types).
+     */
+    function generateKeyPairSync<T extends DHKeyPairOptions>(
+        type: "dh",
+        options: T,
+    ): KeyPairExportResult<T>;
+    function generateKeyPairSync<T extends DSAKeyPairOptions>(
+        type: "dsa",
+        options: T,
+    ): KeyPairExportResult<T>;
+    function generateKeyPairSync<T extends ECKeyPairOptions>(
+        type: "ec",
+        options: T,
+    ): KeyPairExportResult<T>;
+    function generateKeyPairSync<T extends ED25519KeyPairOptions = {}>(
+        type: "ed25519",
+        options?: T,
+    ): KeyPairExportResult<T>;
+    function generateKeyPairSync<T extends ED448KeyPairOptions = {}>(
+        type: "ed448",
+        options?: T,
+    ): KeyPairExportResult<T>;
+    function generateKeyPairSync<T extends MLDSAKeyPairOptions = {}>(
+        type: MLDSAKeyType,
+        options?: T,
+    ): KeyPairExportResult<T>;
+    function generateKeyPairSync<T extends MLKEMKeyPairOptions = {}>(
+        type: MLKEMKeyType,
+        options?: T,
+    ): KeyPairExportResult<T>;
+    function generateKeyPairSync<T extends RSAPSSKeyPairOptions>(
+        type: "rsa-pss",
+        options: T,
+    ): KeyPairExportResult<T>;
+    function generateKeyPairSync<T extends RSAKeyPairOptions>(
+        type: "rsa",
+        options: T,
+    ): KeyPairExportResult<T>;
+    function generateKeyPairSync<T extends SLHDSAKeyPairOptions = {}>(
+        type: SLHDSAKeyType,
+        options?: T,
+    ): KeyPairExportResult<T>;
+    function generateKeyPairSync<T extends X25519KeyPairOptions = {}>(
+        type: "x25519",
+        options?: T,
+    ): KeyPairExportResult<T>;
+    function generateKeyPairSync<T extends X448KeyPairOptions = {}>(
+        type: "x448",
+        options?: T,
+    ): KeyPairExportResult<T>;
+    /**
+     * Generates a new asymmetric key pair of the given `type`. See the
+     * supported [asymmetric key types](https://nodejs.org/docs/latest-v25.x/api/crypto.html#asymmetric-key-types).
+     *
+     * If a `publicKeyEncoding` or `privateKeyEncoding` was specified, this function
+     * behaves as if `keyObject.export()` had been called on its result. Otherwise,
+     * the respective part of the key is returned as a `KeyObject`.
+     *
+     * It is recommended to encode public keys as `'spki'` and private keys as `'pkcs8'` with encryption for long-term storage:
+     *
+     * ```js
+     * const {
+     *   generateKeyPair,
+     * } = await import('node:crypto');
+     *
+     * generateKeyPair('rsa', {
+     *   modulusLength: 4096,
+     *   publicKeyEncoding: {
+     *     type: 'spki',
+     *     format: 'pem',
+     *   },
+     *   privateKeyEncoding: {
+     *     type: 'pkcs8',
+     *     format: 'pem',
+     *     cipher: 'aes-256-cbc',
+     *     passphrase: 'top secret',
+     *   },
+     * }, (err, publicKey, privateKey) => {
+     *   // Handle errors and use the generated key pair.
+     * });
+     * ```
+     *
+     * On completion, `callback` will be called with `err` set to `undefined` and `publicKey` / `privateKey` representing the generated key pair.
+     *
+     * If this method is invoked as its `util.promisify()` ed version, it returns
+     * a `Promise` for an `Object` with `publicKey` and `privateKey` properties.
+     * @since v10.12.0
+     * @param type The asymmetric key type to generate. See the
+     * supported [asymmetric key types](https://nodejs.org/docs/latest-v25.x/api/crypto.html#asymmetric-key-types).
+     */
+    function generateKeyPair<T extends DHKeyPairOptions>(
+        type: "dh",
+        options: T,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    function generateKeyPair<T extends DSAKeyPairOptions>(
+        type: "dsa",
+        options: T,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    function generateKeyPair<T extends ECKeyPairOptions>(
+        type: "ec",
+        options: T,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    function generateKeyPair<T extends ED25519KeyPairOptions = {}>(
+        type: "ed25519",
+        options: T | undefined,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    function generateKeyPair<T extends ED448KeyPairOptions = {}>(
+        type: "ed448",
+        options: T | undefined,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    function generateKeyPair<T extends MLDSAKeyPairOptions = {}>(
+        type: MLDSAKeyType,
+        options: T | undefined,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    function generateKeyPair<T extends MLKEMKeyPairOptions = {}>(
+        type: MLKEMKeyType,
+        options: T | undefined,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    function generateKeyPair<T extends RSAPSSKeyPairOptions>(
+        type: "rsa-pss",
+        options: T,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    function generateKeyPair<T extends RSAKeyPairOptions>(
+        type: "rsa",
+        options: T,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    function generateKeyPair<T extends SLHDSAKeyPairOptions = {}>(
+        type: SLHDSAKeyType,
+        options: T | undefined,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    function generateKeyPair<T extends X25519KeyPairOptions = {}>(
+        type: "x25519",
+        options: T | undefined,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    function generateKeyPair<T extends X448KeyPairOptions = {}>(
+        type: "x448",
+        options: T | undefined,
+        callback: KeyPairExportCallback<T>,
+    ): void;
+    namespace generateKeyPair {
+        function __promisify__<T extends DHKeyPairOptions>(
+            type: "dh",
+            options: T,
+        ): Promise<KeyPairExportResult<T>>;
+        function __promisify__<T extends DSAKeyPairOptions>(
+            type: "dsa",
+            options: T,
+        ): Promise<KeyPairExportResult<T>>;
+        function __promisify__<T extends ECKeyPairOptions>(
+            type: "ec",
+            options: T,
+        ): Promise<KeyPairExportResult<T>>;
+        function __promisify__<T extends ED25519KeyPairOptions = {}>(
+            type: "ed25519",
+            options?: T,
+        ): Promise<KeyPairExportResult<T>>;
+        function __promisify__<T extends ED448KeyPairOptions = {}>(
+            type: "ed448",
+            options?: T,
+        ): Promise<KeyPairExportResult<T>>;
+        function __promisify__<T extends MLDSAKeyPairOptions = {}>(
+            type: MLDSAKeyType,
+            options?: T,
+        ): Promise<KeyPairExportResult<T>>;
+        function __promisify__<T extends MLKEMKeyPairOptions = {}>(
+            type: MLKEMKeyType,
+            options?: T,
+        ): Promise<KeyPairExportResult<T>>;
+        function __promisify__<T extends RSAPSSKeyPairOptions>(
+            type: "rsa-pss",
+            options: T,
+        ): Promise<KeyPairExportResult<T>>;
+        function __promisify__<T extends RSAKeyPairOptions>(
+            type: "rsa",
+            options: T,
+        ): Promise<KeyPairExportResult<T>>;
+        function __promisify__<T extends SLHDSAKeyPairOptions = {}>(
+            type: SLHDSAKeyType,
+            options?: T,
+        ): Promise<KeyPairExportResult<T>>;
+        function __promisify__<T extends X25519KeyPairOptions = {}>(
+            type: "x25519",
+            options?: T,
+        ): Promise<KeyPairExportResult<T>>;
+        function __promisify__<T extends X448KeyPairOptions = {}>(
+            type: "x448",
+            options?: T,
+        ): Promise<KeyPairExportResult<T>>;
+    }
+    /**
+     * Calculates and returns the signature for `data` using the given private key and
+     * algorithm. If `algorithm` is `null` or `undefined`, then the algorithm is
+     * dependent upon the key type.
+     *
+     * `algorithm` is required to be `null` or `undefined` for Ed25519, Ed448, and
+     * ML-DSA.
+     *
+     * If `key` is not a `KeyObject`, this function behaves as if `key` had been
+     * passed to {@link createPrivateKey}. If it is an object, the following
+     * additional properties can be passed:
+     *
+     * If the `callback` function is provided this function uses libuv's threadpool.
+     * @since v12.0.0
+     */
+    function sign(
+        algorithm: string | null | undefined,
+        data: NodeJS.ArrayBufferView,
+        key: KeyLike | SignKeyObjectInput | SignPrivateKeyInput | SignJsonWebKeyInput,
+    ): NonSharedBuffer;
+    function sign(
+        algorithm: string | null | undefined,
+        data: NodeJS.ArrayBufferView,
+        key: KeyLike | SignKeyObjectInput | SignPrivateKeyInput | SignJsonWebKeyInput,
+        callback: (error: Error | null, data: NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Verifies the given signature for `data` using the given key and algorithm. If
+     * `algorithm` is `null` or `undefined`, then the algorithm is dependent upon the
+     * key type.
+     *
+     * `algorithm` is required to be `null` or `undefined` for Ed25519, Ed448, and
+     * ML-DSA.
+     *
+     * If `key` is not a `KeyObject`, this function behaves as if `key` had been
+     * passed to {@link createPublicKey}. If it is an object, the following
+     * additional properties can be passed:
+     *
+     * The `signature` argument is the previously calculated signature for the `data`.
+     *
+     * Because public keys can be derived from private keys, a private key or a public
+     * key may be passed for `key`.
+     *
+     * If the `callback` function is provided this function uses libuv's threadpool.
+     * @since v12.0.0
+     */
+    function verify(
+        algorithm: string | null | undefined,
+        data: NodeJS.ArrayBufferView,
+        key: KeyLike | VerifyKeyObjectInput | VerifyPublicKeyInput | VerifyJsonWebKeyInput,
+        signature: NodeJS.ArrayBufferView,
+    ): boolean;
+    function verify(
+        algorithm: string | null | undefined,
+        data: NodeJS.ArrayBufferView,
+        key: KeyLike | VerifyKeyObjectInput | VerifyPublicKeyInput | VerifyJsonWebKeyInput,
+        signature: NodeJS.ArrayBufferView,
+        callback: (error: Error | null, result: boolean) => void,
+    ): void;
+    /**
+     * Key decapsulation using a KEM algorithm with a private key.
+     *
+     * Supported key types and their KEM algorithms are:
+     *
+     * * `'rsa'` RSA Secret Value Encapsulation
+     * * `'ec'` DHKEM(P-256, HKDF-SHA256), DHKEM(P-384, HKDF-SHA256), DHKEM(P-521, HKDF-SHA256)
+     * * `'x25519'` DHKEM(X25519, HKDF-SHA256)
+     * * `'x448'` DHKEM(X448, HKDF-SHA512)
+     * * `'ml-kem-512'` ML-KEM
+     * * `'ml-kem-768'` ML-KEM
+     * * `'ml-kem-1024'` ML-KEM
+     *
+     * If `key` is not a {@link KeyObject}, this function behaves as if `key` had been
+     * passed to `crypto.createPrivateKey()`.
+     *
+     * If the `callback` function is provided this function uses libuv's threadpool.
+     * @since v24.7.0
+     */
+    function decapsulate(
+        key: KeyLike | PrivateKeyInput | JsonWebKeyInput,
+        ciphertext: ArrayBuffer | NodeJS.ArrayBufferView,
+    ): NonSharedBuffer;
+    function decapsulate(
+        key: KeyLike | PrivateKeyInput | JsonWebKeyInput,
+        ciphertext: ArrayBuffer | NodeJS.ArrayBufferView,
+        callback: (err: Error, sharedKey: NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Computes the Diffie-Hellman shared secret based on a `privateKey` and a `publicKey`.
+     * Both keys must have the same `asymmetricKeyType` and must support either the DH or
+     * ECDH operation.
+     *
+     * If the `callback` function is provided this function uses libuv's threadpool.
+     * @since v13.9.0, v12.17.0
+     */
+    function diffieHellman(options: { privateKey: KeyObject; publicKey: KeyObject }): NonSharedBuffer;
+    function diffieHellman(
+        options: { privateKey: KeyObject; publicKey: KeyObject },
+        callback: (err: Error | null, secret: NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Key encapsulation using a KEM algorithm with a public key.
+     *
+     * Supported key types and their KEM algorithms are:
+     *
+     * * `'rsa'` RSA Secret Value Encapsulation
+     * * `'ec'` DHKEM(P-256, HKDF-SHA256), DHKEM(P-384, HKDF-SHA256), DHKEM(P-521, HKDF-SHA256)
+     * * `'x25519'` DHKEM(X25519, HKDF-SHA256)
+     * * `'x448'` DHKEM(X448, HKDF-SHA512)
+     * * `'ml-kem-512'` ML-KEM
+     * * `'ml-kem-768'` ML-KEM
+     * * `'ml-kem-1024'` ML-KEM
+     *
+     * If `key` is not a {@link KeyObject}, this function behaves as if `key` had been
+     * passed to `crypto.createPublicKey()`.
+     *
+     * If the `callback` function is provided this function uses libuv's threadpool.
+     * @since v24.7.0
+     */
+    function encapsulate(
+        key: KeyLike | PublicKeyInput | JsonWebKeyInput,
+    ): { sharedKey: NonSharedBuffer; ciphertext: NonSharedBuffer };
+    function encapsulate(
+        key: KeyLike | PublicKeyInput | JsonWebKeyInput,
+        callback: (err: Error, result: { sharedKey: NonSharedBuffer; ciphertext: NonSharedBuffer }) => void,
+    ): void;
+    interface OneShotDigestOptions {
+        /**
+         * Encoding used to encode the returned digest.
+         * @default 'hex'
+         */
+        outputEncoding?: BinaryToTextEncoding | "buffer" | undefined;
+        /**
+         * For XOF hash functions such as 'shake256', the outputLength option
+         * can be used to specify the desired output length in bytes.
+         */
+        outputLength?: number | undefined;
+    }
+    interface OneShotDigestOptionsWithStringEncoding extends OneShotDigestOptions {
+        outputEncoding?: BinaryToTextEncoding | undefined;
+    }
+    interface OneShotDigestOptionsWithBufferEncoding extends OneShotDigestOptions {
+        outputEncoding: "buffer";
+    }
+    /**
+     * A utility for creating one-shot hash digests of data. It can be faster than
+     * the object-based `crypto.createHash()` when hashing a smaller amount of data
+     * (<= 5MB) that's readily available. If the data can be big or if it is streamed,
+     * it's still recommended to use `crypto.createHash()` instead.
+     *
+     * The `algorithm` is dependent on the available algorithms supported by the
+     * version of OpenSSL on the platform. Examples are `'sha256'`, `'sha512'`, etc.
+     * On recent releases of OpenSSL, `openssl list -digest-algorithms` will
+     * display the available digest algorithms.
+     *
+     * If `options` is a string, then it specifies the `outputEncoding`.
+     *
+     * Example:
+     *
+     * ```js
+     * import crypto from 'node:crypto';
+     * import { Buffer } from 'node:buffer';
+     *
+     * // Hashing a string and return the result as a hex-encoded string.
+     * const string = 'Node.js';
+     * // 10b3493287f831e81a438811a1ffba01f8cec4b7
+     * console.log(crypto.hash('sha1', string));
+     *
+     * // Encode a base64-encoded string into a Buffer, hash it and return
+     * // the result as a buffer.
+     * const base64 = 'Tm9kZS5qcw==';
+     * // <Buffer 10 b3 49 32 87 f8 31 e8 1a 43 88 11 a1 ff ba 01 f8 ce c4 b7>
+     * console.log(crypto.hash('sha1', Buffer.from(base64, 'base64'), 'buffer'));
+     * ```
+     * @since v21.7.0, v20.12.0
+     * @param data When `data` is a string, it will be encoded as UTF-8 before being hashed. If a different
+     * input encoding is desired for a string input, user could encode the string
+     * into a `TypedArray` using either `TextEncoder` or `Buffer.from()` and passing
+     * the encoded `TypedArray` into this API instead.
+     */
+    function hash(
+        algorithm: string,
+        data: BinaryLike,
+        options?: OneShotDigestOptionsWithStringEncoding | BinaryToTextEncoding,
+    ): string;
+    function hash(
+        algorithm: string,
+        data: BinaryLike,
+        options: OneShotDigestOptionsWithBufferEncoding | "buffer",
+    ): NonSharedBuffer;
+    function hash(
+        algorithm: string,
+        data: BinaryLike,
+        options: OneShotDigestOptions | BinaryToTextEncoding | "buffer",
+    ): string | NonSharedBuffer;
+    type CipherMode = "cbc" | "ccm" | "cfb" | "ctr" | "ecb" | "gcm" | "ocb" | "ofb" | "stream" | "wrap" | "xts";
+    interface CipherInfoOptions {
+        /**
+         * A test key length.
+         */
+        keyLength?: number | undefined;
+        /**
+         * A test IV length.
+         */
+        ivLength?: number | undefined;
+    }
+    interface CipherInfo {
+        /**
+         * The name of the cipher.
+         */
+        name: string;
+        /**
+         * The nid of the cipher.
+         */
+        nid: number;
+        /**
+         * The block size of the cipher in bytes.
+         * This property is omitted when mode is 'stream'.
+         */
+        blockSize?: number | undefined;
+        /**
+         * The expected or default initialization vector length in bytes.
+         * This property is omitted if the cipher does not use an initialization vector.
+         */
+        ivLength?: number | undefined;
+        /**
+         * The expected or default key length in bytes.
+         */
+        keyLength: number;
+        /**
+         * The cipher mode.
+         */
+        mode: CipherMode;
+    }
+    /**
+     * Returns information about a given cipher.
+     *
+     * Some ciphers accept variable length keys and initialization vectors. By default,
+     * the `crypto.getCipherInfo()` method will return the default values for these
+     * ciphers. To test if a given key length or iv length is acceptable for given
+     * cipher, use the `keyLength` and `ivLength` options. If the given values are
+     * unacceptable, `undefined` will be returned.
+     * @since v15.0.0
+     * @param nameOrNid The name or nid of the cipher to query.
+     */
+    function getCipherInfo(nameOrNid: string | number, options?: CipherInfoOptions): CipherInfo | undefined;
+    /**
+     * HKDF is a simple key derivation function defined in RFC 5869\. The given `ikm`, `salt` and `info` are used with the `digest` to derive a key of `keylen` bytes.
+     *
+     * The supplied `callback` function is called with two arguments: `err` and `derivedKey`. If an errors occurs while deriving the key, `err` will be set;
+     * otherwise `err` will be `null`. The successfully generated `derivedKey` will
+     * be passed to the callback as an [ArrayBuffer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer). An error will be thrown if any
+     * of the input arguments specify invalid values or types.
+     *
+     * ```js
+     * import { Buffer } from 'node:buffer';
+     * const {
+     *   hkdf,
+     * } = await import('node:crypto');
+     *
+     * hkdf('sha512', 'key', 'salt', 'info', 64, (err, derivedKey) => {
+     *   if (err) throw err;
+     *   console.log(Buffer.from(derivedKey).toString('hex'));  // '24156e2...5391653'
+     * });
+     * ```
+     * @since v15.0.0
+     * @param digest The digest algorithm to use.
+     * @param ikm The input keying material. Must be provided but can be zero-length.
+     * @param salt The salt value. Must be provided but can be zero-length.
+     * @param info Additional info value. Must be provided but can be zero-length, and cannot be more than 1024 bytes.
+     * @param keylen The length of the key to generate. Must be greater than 0. The maximum allowable value is `255` times the number of bytes produced by the selected digest function (e.g. `sha512`
+     * generates 64-byte hashes, making the maximum HKDF output 16320 bytes).
+     */
+    function hkdf(
+        digest: string,
+        irm: BinaryLike | KeyObject,
+        salt: BinaryLike,
+        info: BinaryLike,
+        keylen: number,
+        callback: (err: Error | null, derivedKey: ArrayBuffer) => void,
+    ): void;
+    /**
+     * Provides a synchronous HKDF key derivation function as defined in RFC 5869\. The
+     * given `ikm`, `salt` and `info` are used with the `digest` to derive a key of `keylen` bytes.
+     *
+     * The successfully generated `derivedKey` will be returned as an [ArrayBuffer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer).
+     *
+     * An error will be thrown if any of the input arguments specify invalid values or
+     * types, or if the derived key cannot be generated.
+     *
+     * ```js
+     * import { Buffer } from 'node:buffer';
+     * const {
+     *   hkdfSync,
+     * } = await import('node:crypto');
+     *
+     * const derivedKey = hkdfSync('sha512', 'key', 'salt', 'info', 64);
+     * console.log(Buffer.from(derivedKey).toString('hex'));  // '24156e2...5391653'
+     * ```
+     * @since v15.0.0
+     * @param digest The digest algorithm to use.
+     * @param ikm The input keying material. Must be provided but can be zero-length.
+     * @param salt The salt value. Must be provided but can be zero-length.
+     * @param info Additional info value. Must be provided but can be zero-length, and cannot be more than 1024 bytes.
+     * @param keylen The length of the key to generate. Must be greater than 0. The maximum allowable value is `255` times the number of bytes produced by the selected digest function (e.g. `sha512`
+     * generates 64-byte hashes, making the maximum HKDF output 16320 bytes).
+     */
+    function hkdfSync(
+        digest: string,
+        ikm: BinaryLike | KeyObject,
+        salt: BinaryLike,
+        info: BinaryLike,
+        keylen: number,
+    ): ArrayBuffer;
+    interface SecureHeapUsage {
+        /**
+         * The total allocated secure heap size as specified using the `--secure-heap=n` command-line flag.
+         */
+        total: number;
+        /**
+         * The minimum allocation from the secure heap as specified using the `--secure-heap-min` command-line flag.
+         */
+        min: number;
+        /**
+         * The total number of bytes currently allocated from the secure heap.
+         */
+        used: number;
+        /**
+         * The calculated ratio of `used` to `total` allocated bytes.
+         */
+        utilization: number;
+    }
+    /**
+     * @since v15.6.0
+     */
+    function secureHeapUsed(): SecureHeapUsage;
+    interface RandomUUIDOptions {
+        /**
+         * By default, to improve performance,
+         * Node.js will pre-emptively generate and persistently cache enough
+         * random data to generate up to 128 random UUIDs. To generate a UUID
+         * without using the cache, set `disableEntropyCache` to `true`.
+         *
+         * @default `false`
+         */
+        disableEntropyCache?: boolean | undefined;
+    }
+    type UUID = `${string}-${string}-${string}-${string}-${string}`;
+    /**
+     * Generates a random [RFC 4122](https://www.rfc-editor.org/rfc/rfc4122.txt) version 4 UUID. The UUID is generated using a
+     * cryptographic pseudorandom number generator.
+     * @since v15.6.0, v14.17.0
+     */
+    function randomUUID(options?: RandomUUIDOptions): UUID;
+    interface X509CheckOptions {
+        /**
+         * @default 'always'
+         */
+        subject?: "always" | "default" | "never" | undefined;
+        /**
+         * @default true
+         */
+        wildcards?: boolean | undefined;
+        /**
+         * @default true
+         */
+        partialWildcards?: boolean | undefined;
+        /**
+         * @default false
+         */
+        multiLabelWildcards?: boolean | undefined;
+        /**
+         * @default false
+         */
+        singleLabelSubdomains?: boolean | undefined;
+    }
+    /**
+     * Encapsulates an X509 certificate and provides read-only access to
+     * its information.
+     *
+     * ```js
+     * const { X509Certificate } = await import('node:crypto');
+     *
+     * const x509 = new X509Certificate('{... pem encoded cert ...}');
+     *
+     * console.log(x509.subject);
+     * ```
+     * @since v15.6.0
+     */
+    class X509Certificate {
+        /**
+         * Will be \`true\` if this is a Certificate Authority (CA) certificate.
+         * @since v15.6.0
+         */
+        readonly ca: boolean;
+        /**
+         * The SHA-1 fingerprint of this certificate.
+         *
+         * Because SHA-1 is cryptographically broken and because the security of SHA-1 is
+         * significantly worse than that of algorithms that are commonly used to sign
+         * certificates, consider using `x509.fingerprint256` instead.
+         * @since v15.6.0
+         */
+        readonly fingerprint: string;
+        /**
+         * The SHA-256 fingerprint of this certificate.
+         * @since v15.6.0
+         */
+        readonly fingerprint256: string;
+        /**
+         * The SHA-512 fingerprint of this certificate.
+         *
+         * Because computing the SHA-256 fingerprint is usually faster and because it is
+         * only half the size of the SHA-512 fingerprint, `x509.fingerprint256` may be
+         * a better choice. While SHA-512 presumably provides a higher level of security in
+         * general, the security of SHA-256 matches that of most algorithms that are
+         * commonly used to sign certificates.
+         * @since v17.2.0, v16.14.0
+         */
+        readonly fingerprint512: string;
+        /**
+         * The complete subject of this certificate.
+         * @since v15.6.0
+         */
+        readonly subject: string;
+        /**
+         * The subject alternative name specified for this certificate.
+         *
+         * This is a comma-separated list of subject alternative names. Each entry begins
+         * with a string identifying the kind of the subject alternative name followed by
+         * a colon and the value associated with the entry.
+         *
+         * Earlier versions of Node.js incorrectly assumed that it is safe to split this
+         * property at the two-character sequence `', '` (see [CVE-2021-44532](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44532)). However,
+         * both malicious and legitimate certificates can contain subject alternative names
+         * that include this sequence when represented as a string.
+         *
+         * After the prefix denoting the type of the entry, the remainder of each entry
+         * might be enclosed in quotes to indicate that the value is a JSON string literal.
+         * For backward compatibility, Node.js only uses JSON string literals within this
+         * property when necessary to avoid ambiguity. Third-party code should be prepared
+         * to handle both possible entry formats.
+         * @since v15.6.0
+         */
+        readonly subjectAltName: string | undefined;
+        /**
+         * A textual representation of the certificate's authority information access
+         * extension.
+         *
+         * This is a line feed separated list of access descriptions. Each line begins with
+         * the access method and the kind of the access location, followed by a colon and
+         * the value associated with the access location.
+         *
+         * After the prefix denoting the access method and the kind of the access location,
+         * the remainder of each line might be enclosed in quotes to indicate that the
+         * value is a JSON string literal. For backward compatibility, Node.js only uses
+         * JSON string literals within this property when necessary to avoid ambiguity.
+         * Third-party code should be prepared to handle both possible entry formats.
+         * @since v15.6.0
+         */
+        readonly infoAccess: string | undefined;
+        /**
+         * An array detailing the key usages for this certificate.
+         * @since v15.6.0
+         */
+        readonly keyUsage: string[];
+        /**
+         * The issuer identification included in this certificate.
+         * @since v15.6.0
+         */
+        readonly issuer: string;
+        /**
+         * The issuer certificate or `undefined` if the issuer certificate is not
+         * available.
+         * @since v15.9.0
+         */
+        readonly issuerCertificate: X509Certificate | undefined;
+        /**
+         * The public key `KeyObject` for this certificate.
+         * @since v15.6.0
+         */
+        readonly publicKey: KeyObject;
+        /**
+         * A `Buffer` containing the DER encoding of this certificate.
+         * @since v15.6.0
+         */
+        readonly raw: NonSharedBuffer;
+        /**
+         * The serial number of this certificate.
+         *
+         * Serial numbers are assigned by certificate authorities and do not uniquely
+         * identify certificates. Consider using `x509.fingerprint256` as a unique
+         * identifier instead.
+         * @since v15.6.0
+         */
+        readonly serialNumber: string;
+        /**
+         * The algorithm used to sign the certificate or `undefined` if the signature algorithm is unknown by OpenSSL.
+         * @since v24.9.0
+         */
+        readonly signatureAlgorithm: string | undefined;
+        /**
+         * The OID of the algorithm used to sign the certificate.
+         * @since v24.9.0
+         */
+        readonly signatureAlgorithmOid: string;
+        /**
+         * The date/time from which this certificate is considered valid.
+         * @since v15.6.0
+         */
+        readonly validFrom: string;
+        /**
+         * The date/time from which this certificate is valid, encapsulated in a `Date` object.
+         * @since v22.10.0
+         */
+        readonly validFromDate: Date;
+        /**
+         * The date/time until which this certificate is considered valid.
+         * @since v15.6.0
+         */
+        readonly validTo: string;
+        /**
+         * The date/time until which this certificate is valid, encapsulated in a `Date` object.
+         * @since v22.10.0
+         */
+        readonly validToDate: Date;
+        constructor(buffer: BinaryLike);
+        /**
+         * Checks whether the certificate matches the given email address.
+         *
+         * If the `'subject'` option is undefined or set to `'default'`, the certificate
+         * subject is only considered if the subject alternative name extension either does
+         * not exist or does not contain any email addresses.
+         *
+         * If the `'subject'` option is set to `'always'` and if the subject alternative
+         * name extension either does not exist or does not contain a matching email
+         * address, the certificate subject is considered.
+         *
+         * If the `'subject'` option is set to `'never'`, the certificate subject is never
+         * considered, even if the certificate contains no subject alternative names.
+         * @since v15.6.0
+         * @return Returns `email` if the certificate matches, `undefined` if it does not.
+         */
+        checkEmail(email: string, options?: Pick<X509CheckOptions, "subject">): string | undefined;
+        /**
+         * Checks whether the certificate matches the given host name.
+         *
+         * If the certificate matches the given host name, the matching subject name is
+         * returned. The returned name might be an exact match (e.g., `foo.example.com`)
+         * or it might contain wildcards (e.g., `*.example.com`). Because host name
+         * comparisons are case-insensitive, the returned subject name might also differ
+         * from the given `name` in capitalization.
+         *
+         * If the `'subject'` option is undefined or set to `'default'`, the certificate
+         * subject is only considered if the subject alternative name extension either does
+         * not exist or does not contain any DNS names. This behavior is consistent with [RFC 2818](https://www.rfc-editor.org/rfc/rfc2818.txt) ("HTTP Over TLS").
+         *
+         * If the `'subject'` option is set to `'always'` and if the subject alternative
+         * name extension either does not exist or does not contain a matching DNS name,
+         * the certificate subject is considered.
+         *
+         * If the `'subject'` option is set to `'never'`, the certificate subject is never
+         * considered, even if the certificate contains no subject alternative names.
+         * @since v15.6.0
+         * @return Returns a subject name that matches `name`, or `undefined` if no subject name matches `name`.
+         */
+        checkHost(name: string, options?: X509CheckOptions): string | undefined;
+        /**
+         * Checks whether the certificate matches the given IP address (IPv4 or IPv6).
+         *
+         * Only [RFC 5280](https://www.rfc-editor.org/rfc/rfc5280.txt) `iPAddress` subject alternative names are considered, and they
+         * must match the given `ip` address exactly. Other subject alternative names as
+         * well as the subject field of the certificate are ignored.
+         * @since v15.6.0
+         * @return Returns `ip` if the certificate matches, `undefined` if it does not.
+         */
+        checkIP(ip: string): string | undefined;
+        /**
+         * Checks whether this certificate was potentially issued by the given `otherCert`
+         * by comparing the certificate metadata.
+         *
+         * This is useful for pruning a list of possible issuer certificates which have been
+         * selected using a more rudimentary filtering routine, i.e. just based on subject
+         * and issuer names.
+         *
+         * Finally, to verify that this certificate's signature was produced by a private key
+         * corresponding to `otherCert`'s public key use `x509.verify(publicKey)`
+         * with `otherCert`'s public key represented as a `KeyObject`
+         * like so
+         *
+         * ```js
+         * if (!x509.verify(otherCert.publicKey)) {
+         *   throw new Error('otherCert did not issue x509');
+         * }
+         * ```
+         * @since v15.6.0
+         */
+        checkIssued(otherCert: X509Certificate): boolean;
+        /**
+         * Checks whether the public key for this certificate is consistent with
+         * the given private key.
+         * @since v15.6.0
+         * @param privateKey A private key.
+         */
+        checkPrivateKey(privateKey: KeyObject): boolean;
+        /**
+         * There is no standard JSON encoding for X509 certificates. The`toJSON()` method returns a string containing the PEM encoded
+         * certificate.
+         * @since v15.6.0
+         */
+        toJSON(): string;
+        /**
+         * Returns information about this certificate using the legacy `certificate object` encoding.
+         * @since v15.6.0
+         */
+        toLegacyObject(): PeerCertificate;
+        /**
+         * Returns the PEM-encoded certificate.
+         * @since v15.6.0
+         */
+        toString(): string;
+        /**
+         * Verifies that this certificate was signed by the given public key.
+         * Does not perform any other validation checks on the certificate.
+         * @since v15.6.0
+         * @param publicKey A public key.
+         */
+        verify(publicKey: KeyObject): boolean;
+    }
+    type LargeNumberLike = NodeJS.ArrayBufferView | SharedArrayBuffer | ArrayBuffer | bigint;
+    interface GeneratePrimeOptions {
+        add?: LargeNumberLike | undefined;
+        rem?: LargeNumberLike | undefined;
+        /**
+         * @default false
+         */
+        safe?: boolean | undefined;
+        bigint?: boolean | undefined;
+    }
+    interface GeneratePrimeOptionsBigInt extends GeneratePrimeOptions {
+        bigint: true;
+    }
+    interface GeneratePrimeOptionsArrayBuffer extends GeneratePrimeOptions {
+        bigint?: false | undefined;
+    }
+    /**
+     * Generates a pseudorandom prime of `size` bits.
+     *
+     * If `options.safe` is `true`, the prime will be a safe prime -- that is, `(prime - 1) / 2` will also be a prime.
+     *
+     * The `options.add` and `options.rem` parameters can be used to enforce additional
+     * requirements, e.g., for Diffie-Hellman:
+     *
+     * * If `options.add` and `options.rem` are both set, the prime will satisfy the
+     * condition that `prime % add = rem`.
+     * * If only `options.add` is set and `options.safe` is not `true`, the prime will
+     * satisfy the condition that `prime % add = 1`.
+     * * If only `options.add` is set and `options.safe` is set to `true`, the prime
+     * will instead satisfy the condition that `prime % add = 3`. This is necessary
+     * because `prime % add = 1` for `options.add > 2` would contradict the condition
+     * enforced by `options.safe`.
+     * * `options.rem` is ignored if `options.add` is not given.
+     *
+     * Both `options.add` and `options.rem` must be encoded as big-endian sequences
+     * if given as an `ArrayBuffer`, `SharedArrayBuffer`, `TypedArray`, `Buffer`, or `DataView`.
+     *
+     * By default, the prime is encoded as a big-endian sequence of octets
+     * in an [ArrayBuffer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer). If the `bigint` option is `true`, then a
+     * [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt) is provided.
+     * @since v15.8.0
+     * @param size The size (in bits) of the prime to generate.
+     */
+    function generatePrime(size: number, callback: (err: Error | null, prime: ArrayBuffer) => void): void;
+    function generatePrime(
+        size: number,
+        options: GeneratePrimeOptionsBigInt,
+        callback: (err: Error | null, prime: bigint) => void,
+    ): void;
+    function generatePrime(
+        size: number,
+        options: GeneratePrimeOptionsArrayBuffer,
+        callback: (err: Error | null, prime: ArrayBuffer) => void,
+    ): void;
+    function generatePrime(
+        size: number,
+        options: GeneratePrimeOptions,
+        callback: (err: Error | null, prime: ArrayBuffer | bigint) => void,
+    ): void;
+    /**
+     * Generates a pseudorandom prime of `size` bits.
+     *
+     * If `options.safe` is `true`, the prime will be a safe prime -- that is, `(prime - 1) / 2` will also be a prime.
+     *
+     * The `options.add` and `options.rem` parameters can be used to enforce additional
+     * requirements, e.g., for Diffie-Hellman:
+     *
+     * * If `options.add` and `options.rem` are both set, the prime will satisfy the
+     * condition that `prime % add = rem`.
+     * * If only `options.add` is set and `options.safe` is not `true`, the prime will
+     * satisfy the condition that `prime % add = 1`.
+     * * If only `options.add` is set and `options.safe` is set to `true`, the prime
+     * will instead satisfy the condition that `prime % add = 3`. This is necessary
+     * because `prime % add = 1` for `options.add > 2` would contradict the condition
+     * enforced by `options.safe`.
+     * * `options.rem` is ignored if `options.add` is not given.
+     *
+     * Both `options.add` and `options.rem` must be encoded as big-endian sequences
+     * if given as an `ArrayBuffer`, `SharedArrayBuffer`, `TypedArray`, `Buffer`, or `DataView`.
+     *
+     * By default, the prime is encoded as a big-endian sequence of octets
+     * in an [ArrayBuffer](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer). If the `bigint` option is `true`, then a
+     * [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt) is provided.
+     * @since v15.8.0
+     * @param size The size (in bits) of the prime to generate.
+     */
+    function generatePrimeSync(size: number): ArrayBuffer;
+    function generatePrimeSync(size: number, options: GeneratePrimeOptionsBigInt): bigint;
+    function generatePrimeSync(size: number, options: GeneratePrimeOptionsArrayBuffer): ArrayBuffer;
+    function generatePrimeSync(size: number, options: GeneratePrimeOptions): ArrayBuffer | bigint;
+    interface CheckPrimeOptions {
+        /**
+         * The number of Miller-Rabin probabilistic primality iterations to perform.
+         * When the value is 0 (zero), a number of checks is used that yields a false positive rate of at most `2**-64` for random input.
+         * Care must be used when selecting a number of checks.
+         * Refer to the OpenSSL documentation for the BN_is_prime_ex function nchecks options for more details.
+         *
+         * @default 0
+         */
+        checks?: number | undefined;
+    }
+    /**
+     * Checks the primality of the `candidate`.
+     * @since v15.8.0
+     * @param candidate A possible prime encoded as a sequence of big endian octets of arbitrary length.
+     */
+    function checkPrime(value: LargeNumberLike, callback: (err: Error | null, result: boolean) => void): void;
+    function checkPrime(
+        value: LargeNumberLike,
+        options: CheckPrimeOptions,
+        callback: (err: Error | null, result: boolean) => void,
+    ): void;
+    /**
+     * Checks the primality of the `candidate`.
+     * @since v15.8.0
+     * @param candidate A possible prime encoded as a sequence of big endian octets of arbitrary length.
+     * @return `true` if the candidate is a prime with an error probability less than `0.25 ** options.checks`.
+     */
+    function checkPrimeSync(candidate: LargeNumberLike, options?: CheckPrimeOptions): boolean;
+    /**
+     * Load and set the `engine` for some or all OpenSSL functions (selected by flags).
+     *
+     * `engine` could be either an id or a path to the engine's shared library.
+     *
+     * The optional `flags` argument uses `ENGINE_METHOD_ALL` by default. The `flags` is a bit field taking one of or a mix of the following flags (defined in `crypto.constants`):
+     *
+     * * `crypto.constants.ENGINE_METHOD_RSA`
+     * * `crypto.constants.ENGINE_METHOD_DSA`
+     * * `crypto.constants.ENGINE_METHOD_DH`
+     * * `crypto.constants.ENGINE_METHOD_RAND`
+     * * `crypto.constants.ENGINE_METHOD_EC`
+     * * `crypto.constants.ENGINE_METHOD_CIPHERS`
+     * * `crypto.constants.ENGINE_METHOD_DIGESTS`
+     * * `crypto.constants.ENGINE_METHOD_PKEY_METHS`
+     * * `crypto.constants.ENGINE_METHOD_PKEY_ASN1_METHS`
+     * * `crypto.constants.ENGINE_METHOD_ALL`
+     * * `crypto.constants.ENGINE_METHOD_NONE`
+     * @since v0.11.11
+     * @param flags
+     */
+    function setEngine(engine: string, flags?: number): void;
+    /**
+     * A convenient alias for {@link webcrypto.getRandomValues}. This
+     * implementation is not compliant with the Web Crypto spec, to write
+     * web-compatible code use {@link webcrypto.getRandomValues} instead.
+     * @since v17.4.0
+     * @return Returns `typedArray`.
+     */
+    function getRandomValues<
+        T extends Exclude<
+            NodeJS.NonSharedTypedArray,
+            NodeJS.NonSharedFloat16Array | NodeJS.NonSharedFloat32Array | NodeJS.NonSharedFloat64Array
+        >,
+    >(typedArray: T): T;
+    type Argon2Algorithm = "argon2d" | "argon2i" | "argon2id";
+    interface Argon2Parameters {
+        /**
+         * REQUIRED, this is the password for password hashing applications of Argon2.
+         */
+        message: string | ArrayBuffer | NodeJS.ArrayBufferView;
+        /**
+         * REQUIRED, must be at least 8 bytes long. This is the salt for password hashing applications of Argon2.
+         */
+        nonce: string | ArrayBuffer | NodeJS.ArrayBufferView;
+        /**
+         * REQUIRED, degree of parallelism determines how many computational chains (lanes)
+         * can be run. Must be greater than 1 and less than `2**24-1`.
+         */
+        parallelism: number;
+        /**
+         * REQUIRED, the length of the key to generate. Must be greater than 4 and
+         * less than `2**32-1`.
+         */
+        tagLength: number;
+        /**
+         * REQUIRED, memory cost in 1KiB blocks. Must be greater than
+         * `8 * parallelism` and less than `2**32-1`. The actual number of blocks is rounded
+         * down to the nearest multiple of `4 * parallelism`.
+         */
+        memory: number;
+        /**
+         * REQUIRED, number of passes (iterations). Must be greater than 1 and less
+         * than `2**32-1`.
+         */
+        passes: number;
+        /**
+         * OPTIONAL, Random additional input,
+         * similar to the salt, that should **NOT** be stored with the derived key. This is known as pepper in
+         * password hashing applications. If used, must have a length not greater than `2**32-1` bytes.
+         */
+        secret?: string | ArrayBuffer | NodeJS.ArrayBufferView | undefined;
+        /**
+         * OPTIONAL, Additional data to
+         * be added to the hash, functionally equivalent to salt or secret, but meant for
+         * non-random data. If used, must have a length not greater than `2**32-1` bytes.
+         */
+        associatedData?: string | ArrayBuffer | NodeJS.ArrayBufferView | undefined;
+    }
+    /**
+     * Provides an asynchronous [Argon2](https://www.rfc-editor.org/rfc/rfc9106.html) implementation. Argon2 is a password-based
+     * key derivation function that is designed to be expensive computationally and
+     * memory-wise in order to make brute-force attacks unrewarding.
+     *
+     * The `nonce` should be as unique as possible. It is recommended that a nonce is
+     * random and at least 16 bytes long. See [NIST SP 800-132](https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf) for details.
+     *
+     * When passing strings for `message`, `nonce`, `secret` or `associatedData`, please
+     * consider [caveats when using strings as inputs to cryptographic APIs](https://nodejs.org/docs/latest-v25.x/api/crypto.html#using-strings-as-inputs-to-cryptographic-apis).
+     *
+     * The `callback` function is called with two arguments: `err` and `derivedKey`.
+     * `err` is an exception object when key derivation fails, otherwise `err` is
+     * `null`. `derivedKey` is passed to the callback as a `Buffer`.
+     *
+     * An exception is thrown when any of the input arguments specify invalid values
+     * or types.
+     *
+     * ```js
+     * const { argon2, randomBytes } = await import('node:crypto');
+     *
+     * const parameters = {
+     *   message: 'password',
+     *   nonce: randomBytes(16),
+     *   parallelism: 4,
+     *   tagLength: 64,
+     *   memory: 65536,
+     *   passes: 3,
+     * };
+     *
+     * argon2('argon2id', parameters, (err, derivedKey) => {
+     *   if (err) throw err;
+     *   console.log(derivedKey.toString('hex'));  // 'af91dad...9520f15'
+     * });
+     * ```
+     * @since v24.7.0
+     * @param algorithm Variant of Argon2, one of `"argon2d"`, `"argon2i"` or `"argon2id"`.
+     * @experimental
+     */
+    function argon2(
+        algorithm: Argon2Algorithm,
+        parameters: Argon2Parameters,
+        callback: (err: Error | null, derivedKey: NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Provides a synchronous [Argon2][] implementation. Argon2 is a password-based
+     * key derivation function that is designed to be expensive computationally and
+     * memory-wise in order to make brute-force attacks unrewarding.
+     *
+     * The `nonce` should be as unique as possible. It is recommended that a nonce is
+     * random and at least 16 bytes long. See [NIST SP 800-132](https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf) for details.
+     *
+     * When passing strings for `message`, `nonce`, `secret` or `associatedData`, please
+     * consider [caveats when using strings as inputs to cryptographic APIs](https://nodejs.org/docs/latest-v25.x/api/crypto.html#using-strings-as-inputs-to-cryptographic-apis).
+     *
+     * An exception is thrown when key derivation fails, otherwise the derived key is
+     * returned as a `Buffer`.
+     *
+     * An exception is thrown when any of the input arguments specify invalid values
+     * or types.
+     *
+     * ```js
+     * const { argon2Sync, randomBytes } = await import('node:crypto');
+     *
+     * const parameters = {
+     *   message: 'password',
+     *   nonce: randomBytes(16),
+     *   parallelism: 4,
+     *   tagLength: 64,
+     *   memory: 65536,
+     *   passes: 3,
+     * };
+     *
+     * const derivedKey = argon2Sync('argon2id', parameters);
+     * console.log(derivedKey.toString('hex'));  // 'af91dad...9520f15'
+     * ```
+     * @since v24.7.0
+     * @experimental
+     */
+    function argon2Sync(algorithm: Argon2Algorithm, parameters: Argon2Parameters): NonSharedBuffer;
+    /**
+     * A convenient alias for `crypto.webcrypto.subtle`.
+     * @since v17.4.0
+     */
+    const subtle: webcrypto.SubtleCrypto;
+    /**
+     * An implementation of the Web Crypto API standard.
+     *
+     * See the {@link https://nodejs.org/docs/latest/api/webcrypto.html Web Crypto API documentation} for details.
+     * @since v15.0.0
+     */
+    const webcrypto: webcrypto.Crypto;
+    namespace webcrypto {
+        type AlgorithmIdentifier = Algorithm | string;
+        type BigInteger = NodeJS.NonSharedUint8Array;
+        type KeyFormat = "jwk" | "pkcs8" | "raw" | "raw-public" | "raw-secret" | "raw-seed" | "spki";
+        type KeyType = "private" | "public" | "secret";
+        type KeyUsage =
+            | "decapsulateBits"
+            | "decapsulateKey"
+            | "decrypt"
+            | "deriveBits"
+            | "deriveKey"
+            | "encapsulateBits"
+            | "encapsulateKey"
+            | "encrypt"
+            | "sign"
+            | "unwrapKey"
+            | "verify"
+            | "wrapKey";
+        type HashAlgorithmIdentifier = AlgorithmIdentifier;
+        type NamedCurve = string;
+        interface AeadParams extends Algorithm {
+            additionalData?: NodeJS.BufferSource;
+            iv: NodeJS.BufferSource;
+            tagLength: number;
+        }
+        interface AesCbcParams extends Algorithm {
+            iv: NodeJS.BufferSource;
+        }
+        interface AesCtrParams extends Algorithm {
+            counter: NodeJS.BufferSource;
+            length: number;
+        }
+        interface AesDerivedKeyParams extends Algorithm {
+            length: number;
+        }
+        interface AesKeyAlgorithm extends KeyAlgorithm {
+            length: number;
+        }
+        interface AesKeyGenParams extends Algorithm {
+            length: number;
+        }
+        interface Algorithm {
+            name: string;
+        }
+        interface Argon2Params extends Algorithm {
+            associatedData?: NodeJS.BufferSource;
+            memory: number;
+            nonce: NodeJS.BufferSource;
+            parallelism: number;
+            passes: number;
+            secretValue?: NodeJS.BufferSource;
+            version?: number;
+        }
+        interface CShakeParams extends Algorithm {
+            customization?: NodeJS.BufferSource;
+            functionName?: NodeJS.BufferSource;
+            length: number;
+        }
+        interface ContextParams extends Algorithm {
+            context?: NodeJS.BufferSource;
+        }
+        interface EcKeyAlgorithm extends KeyAlgorithm {
+            namedCurve: NamedCurve;
+        }
+        interface EcKeyGenParams extends Algorithm {
+            namedCurve: NamedCurve;
+        }
+        interface EcKeyImportParams extends Algorithm {
+            namedCurve: NamedCurve;
+        }
+        interface EcdhKeyDeriveParams extends Algorithm {
+            public: CryptoKey;
+        }
+        interface EcdsaParams extends Algorithm {
+            hash: HashAlgorithmIdentifier;
+        }
+        interface HkdfParams extends Algorithm {
+            hash: HashAlgorithmIdentifier;
+            info: NodeJS.BufferSource;
+            salt: NodeJS.BufferSource;
+        }
+        interface HmacImportParams extends Algorithm {
+            hash: HashAlgorithmIdentifier;
+            length?: number;
+        }
+        interface HmacKeyAlgorithm extends KeyAlgorithm {
+            hash: KeyAlgorithm;
+            length: number;
+        }
+        interface HmacKeyGenParams extends Algorithm {
+            hash: HashAlgorithmIdentifier;
+            length?: number;
+        }
+        interface JsonWebKey {
+            alg?: string;
+            crv?: string;
+            d?: string;
+            dp?: string;
+            dq?: string;
+            e?: string;
+            ext?: boolean;
+            k?: string;
+            key_ops?: string[];
+            kty?: string;
+            n?: string;
+            oth?: RsaOtherPrimesInfo[];
+            p?: string;
+            q?: string;
+            qi?: string;
+            use?: string;
+            x?: string;
+            y?: string;
+        }
+        interface KeyAlgorithm {
+            name: string;
+        }
+        interface KmacImportParams extends Algorithm {
+            length?: number;
+        }
+        interface KmacKeyAlgorithm extends KeyAlgorithm {
+            length: number;
+        }
+        interface KmacKeyGenParams extends Algorithm {
+            length?: number;
+        }
+        interface KmacParams extends Algorithm {
+            customization?: NodeJS.BufferSource;
+            length: number;
+        }
+        interface Pbkdf2Params extends Algorithm {
+            hash: HashAlgorithmIdentifier;
+            iterations: number;
+            salt: NodeJS.BufferSource;
+        }
+        interface RsaHashedImportParams extends Algorithm {
+            hash: HashAlgorithmIdentifier;
+        }
+        interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
+            hash: KeyAlgorithm;
+        }
+        interface RsaHashedKeyGenParams extends RsaKeyGenParams {
+            hash: HashAlgorithmIdentifier;
+        }
+        interface RsaKeyAlgorithm extends KeyAlgorithm {
+            modulusLength: number;
+            publicExponent: BigInteger;
+        }
+        interface RsaKeyGenParams extends Algorithm {
+            modulusLength: number;
+            publicExponent: BigInteger;
+        }
+        interface RsaOaepParams extends Algorithm {
+            label?: NodeJS.BufferSource;
+        }
+        interface RsaOtherPrimesInfo {
+            d?: string;
+            r?: string;
+            t?: string;
+        }
+        interface RsaPssParams extends Algorithm {
+            saltLength: number;
+        }
+        interface Crypto {
+            readonly subtle: SubtleCrypto;
+            getRandomValues<
+                T extends Exclude<
+                    NodeJS.NonSharedTypedArray,
+                    NodeJS.NonSharedFloat16Array | NodeJS.NonSharedFloat32Array | NodeJS.NonSharedFloat64Array
+                >,
+            >(
+                typedArray: T,
+            ): T;
+            randomUUID(): UUID;
+        }
+        interface CryptoKey {
+            readonly algorithm: KeyAlgorithm;
+            readonly extractable: boolean;
+            readonly type: KeyType;
+            readonly usages: KeyUsage[];
+        }
+        interface CryptoKeyPair {
+            privateKey: CryptoKey;
+            publicKey: CryptoKey;
+        }
+        interface EncapsulatedBits {
+            sharedKey: ArrayBuffer;
+            ciphertext: ArrayBuffer;
+        }
+        interface EncapsulatedKey {
+            sharedKey: CryptoKey;
+            ciphertext: ArrayBuffer;
+        }
+        interface SubtleCrypto {
+            decapsulateBits(
+                decapsulationAlgorithm: AlgorithmIdentifier,
+                decapsulationKey: CryptoKey,
+                ciphertext: NodeJS.BufferSource,
+            ): Promise<ArrayBuffer>;
+            decapsulateKey(
+                decapsulationAlgorithm: AlgorithmIdentifier,
+                decapsulationKey: CryptoKey,
+                ciphertext: NodeJS.BufferSource,
+                sharedKeyAlgorithm: AlgorithmIdentifier | HmacImportParams | AesDerivedKeyParams | KmacImportParams,
+                extractable: boolean,
+                usages: KeyUsage[],
+            ): Promise<CryptoKey>;
+            decrypt(
+                algorithm: AlgorithmIdentifier | RsaOaepParams | AesCtrParams | AesCbcParams | AeadParams,
+                key: CryptoKey,
+                data: NodeJS.BufferSource,
+            ): Promise<ArrayBuffer>;
+            deriveBits(
+                algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params | Argon2Params,
+                baseKey: CryptoKey,
+                length?: number | null,
+            ): Promise<ArrayBuffer>;
+            deriveKey(
+                algorithm: AlgorithmIdentifier | EcdhKeyDeriveParams | HkdfParams | Pbkdf2Params | Argon2Params,
+                baseKey: CryptoKey,
+                derivedKeyType: AlgorithmIdentifier | AesDerivedKeyParams | HmacImportParams | KmacImportParams,
+                extractable: boolean,
+                keyUsages: readonly KeyUsage[],
+            ): Promise<CryptoKey>;
+            digest(algorithm: AlgorithmIdentifier | CShakeParams, data: NodeJS.BufferSource): Promise<ArrayBuffer>;
+            encapsulateBits(
+                encapsulationAlgorithm: AlgorithmIdentifier,
+                encapsulationKey: CryptoKey,
+            ): Promise<EncapsulatedBits>;
+            encapsulateKey(
+                encapsulationAlgorithm: AlgorithmIdentifier,
+                encapsulationKey: CryptoKey,
+                sharedKeyAlgorithm: AlgorithmIdentifier | AesDerivedKeyParams | HmacImportParams | KmacImportParams,
+                extractable: boolean,
+                usages: KeyUsage[],
+            ): Promise<EncapsulatedKey>;
+            encrypt(
+                algorithm: AlgorithmIdentifier | RsaOaepParams | AesCtrParams | AesCbcParams | AeadParams,
+                key: CryptoKey,
+                data: NodeJS.BufferSource,
+            ): Promise<ArrayBuffer>;
+            exportKey(format: "jwk", key: CryptoKey): Promise<JsonWebKey>;
+            exportKey(format: Exclude<KeyFormat, "jwk">, key: CryptoKey): Promise<ArrayBuffer>;
+            exportKey(format: KeyFormat, key: CryptoKey): Promise<ArrayBuffer | JsonWebKey>;
+            generateKey(
+                algorithm: RsaHashedKeyGenParams | EcKeyGenParams,
+                extractable: boolean,
+                keyUsages: KeyUsage[],
+            ): Promise<CryptoKeyPair>;
+            generateKey(
+                algorithm: AesKeyGenParams | HmacKeyGenParams | Pbkdf2Params | KmacKeyGenParams,
+                extractable: boolean,
+                keyUsages: KeyUsage[],
+            ): Promise<CryptoKey>;
+            generateKey(
+                algorithm: AlgorithmIdentifier,
+                extractable: boolean,
+                keyUsages: KeyUsage[],
+            ): Promise<CryptoKeyPair | CryptoKey>;
+            getPublicKey(key: CryptoKey, keyUsages: KeyUsage[]): Promise<CryptoKey>;
+            importKey(
+                format: "jwk",
+                keyData: JsonWebKey,
+                algorithm:
+                    | AlgorithmIdentifier
+                    | RsaHashedImportParams
+                    | EcKeyImportParams
+                    | HmacImportParams
+                    | AesKeyAlgorithm
+                    | KmacImportParams,
+                extractable: boolean,
+                keyUsages: KeyUsage[],
+            ): Promise<CryptoKey>;
+            importKey(
+                format: Exclude<KeyFormat, "jwk">,
+                keyData: NodeJS.BufferSource,
+                algorithm:
+                    | AlgorithmIdentifier
+                    | RsaHashedImportParams
+                    | EcKeyImportParams
+                    | HmacImportParams
+                    | AesKeyAlgorithm
+                    | KmacImportParams,
+                extractable: boolean,
+                keyUsages: KeyUsage[],
+            ): Promise<CryptoKey>;
+            sign(
+                algorithm: AlgorithmIdentifier | RsaPssParams | EcdsaParams | ContextParams | KmacParams,
+                key: CryptoKey,
+                data: NodeJS.BufferSource,
+            ): Promise<ArrayBuffer>;
+            unwrapKey(
+                format: KeyFormat,
+                wrappedKey: NodeJS.BufferSource,
+                unwrappingKey: CryptoKey,
+                unwrapAlgorithm: AlgorithmIdentifier | RsaOaepParams | AesCtrParams | AesCbcParams | AeadParams,
+                unwrappedKeyAlgorithm:
+                    | AlgorithmIdentifier
+                    | RsaHashedImportParams
+                    | EcKeyImportParams
+                    | HmacImportParams
+                    | AesKeyAlgorithm
+                    | KmacImportParams,
+                extractable: boolean,
+                keyUsages: KeyUsage[],
+            ): Promise<CryptoKey>;
+            verify(
+                algorithm: AlgorithmIdentifier | RsaPssParams | EcdsaParams | ContextParams | KmacParams,
+                key: CryptoKey,
+                signature: NodeJS.BufferSource,
+                data: NodeJS.BufferSource,
+            ): Promise<boolean>;
+            wrapKey(
+                format: KeyFormat,
+                key: CryptoKey,
+                wrappingKey: CryptoKey,
+                wrapAlgorithm: AlgorithmIdentifier | RsaOaepParams | AesCtrParams | AesCbcParams | AeadParams,
+            ): Promise<ArrayBuffer>;
+        }
+    }
+}
+declare module "crypto" {
+    export * from "node:crypto";
+}
diff --git a/mqtt-backend/node_modules/@types/node/dgram.d.ts b/mqtt-backend/node_modules/@types/node/dgram.d.ts
new file mode 100644
index 0000000..8665497
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/dgram.d.ts
@@ -0,0 +1,537 @@
+declare module "node:dgram" {
+    import { NonSharedBuffer } from "node:buffer";
+    import * as dns from "node:dns";
+    import { Abortable, EventEmitter, InternalEventEmitter } from "node:events";
+    import { AddressInfo, BlockList } from "node:net";
+    interface RemoteInfo {
+        address: string;
+        family: "IPv4" | "IPv6";
+        port: number;
+        size: number;
+    }
+    interface BindOptions {
+        port?: number | undefined;
+        address?: string | undefined;
+        exclusive?: boolean | undefined;
+        fd?: number | undefined;
+    }
+    type SocketType = "udp4" | "udp6";
+    interface SocketOptions extends Abortable {
+        type: SocketType;
+        reuseAddr?: boolean | undefined;
+        reusePort?: boolean | undefined;
+        /**
+         * @default false
+         */
+        ipv6Only?: boolean | undefined;
+        recvBufferSize?: number | undefined;
+        sendBufferSize?: number | undefined;
+        lookup?:
+            | ((
+                hostname: string,
+                options: dns.LookupOneOptions,
+                callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void,
+            ) => void)
+            | undefined;
+        receiveBlockList?: BlockList | undefined;
+        sendBlockList?: BlockList | undefined;
+    }
+    /**
+     * Creates a `dgram.Socket` object. Once the socket is created, calling `socket.bind()` will instruct the socket to begin listening for datagram
+     * messages. When `address` and `port` are not passed to `socket.bind()` the
+     * method will bind the socket to the "all interfaces" address on a random port
+     * (it does the right thing for both `udp4` and `udp6` sockets). The bound address
+     * and port can be retrieved using `socket.address().address` and `socket.address().port`.
+     *
+     * If the `signal` option is enabled, calling `.abort()` on the corresponding `AbortController` is similar to calling `.close()` on the socket:
+     *
+     * ```js
+     * const controller = new AbortController();
+     * const { signal } = controller;
+     * const server = dgram.createSocket({ type: 'udp4', signal });
+     * server.on('message', (msg, rinfo) => {
+     *   console.log(`server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
+     * });
+     * // Later, when you want to close the server.
+     * controller.abort();
+     * ```
+     * @since v0.11.13
+     * @param options Available options are:
+     * @param callback Attached as a listener for `'message'` events. Optional.
+     */
+    function createSocket(type: SocketType, callback?: (msg: NonSharedBuffer, rinfo: RemoteInfo) => void): Socket;
+    function createSocket(options: SocketOptions, callback?: (msg: NonSharedBuffer, rinfo: RemoteInfo) => void): Socket;
+    interface SocketEventMap {
+        "close": [];
+        "connect": [];
+        "error": [err: Error];
+        "listening": [];
+        "message": [msg: NonSharedBuffer, rinfo: RemoteInfo];
+    }
+    /**
+     * Encapsulates the datagram functionality.
+     *
+     * New instances of `dgram.Socket` are created using {@link createSocket}.
+     * The `new` keyword is not to be used to create `dgram.Socket` instances.
+     * @since v0.1.99
+     */
+    class Socket implements EventEmitter {
+        /**
+         * Tells the kernel to join a multicast group at the given `multicastAddress` and `multicastInterface` using the `IP_ADD_MEMBERSHIP` socket option. If the `multicastInterface` argument is not
+         * specified, the operating system will choose
+         * one interface and will add membership to it. To add membership to every
+         * available interface, call `addMembership` multiple times, once per interface.
+         *
+         * When called on an unbound socket, this method will implicitly bind to a random
+         * port, listening on all interfaces.
+         *
+         * When sharing a UDP socket across multiple `cluster` workers, the`socket.addMembership()` function must be called only once or an`EADDRINUSE` error will occur:
+         *
+         * ```js
+         * import cluster from 'node:cluster';
+         * import dgram from 'node:dgram';
+         *
+         * if (cluster.isPrimary) {
+         *   cluster.fork(); // Works ok.
+         *   cluster.fork(); // Fails with EADDRINUSE.
+         * } else {
+         *   const s = dgram.createSocket('udp4');
+         *   s.bind(1234, () => {
+         *     s.addMembership('224.0.0.114');
+         *   });
+         * }
+         * ```
+         * @since v0.6.9
+         */
+        addMembership(multicastAddress: string, multicastInterface?: string): void;
+        /**
+         * Returns an object containing the address information for a socket.
+         * For UDP sockets, this object will contain `address`, `family`, and `port` properties.
+         *
+         * This method throws `EBADF` if called on an unbound socket.
+         * @since v0.1.99
+         */
+        address(): AddressInfo;
+        /**
+         * For UDP sockets, causes the `dgram.Socket` to listen for datagram
+         * messages on a named `port` and optional `address`. If `port` is not
+         * specified or is `0`, the operating system will attempt to bind to a
+         * random port. If `address` is not specified, the operating system will
+         * attempt to listen on all addresses. Once binding is complete, a `'listening'` event is emitted and the optional `callback` function is
+         * called.
+         *
+         * Specifying both a `'listening'` event listener and passing a `callback` to the `socket.bind()` method is not harmful but not very
+         * useful.
+         *
+         * A bound datagram socket keeps the Node.js process running to receive
+         * datagram messages.
+         *
+         * If binding fails, an `'error'` event is generated. In rare case (e.g.
+         * attempting to bind with a closed socket), an `Error` may be thrown.
+         *
+         * Example of a UDP server listening on port 41234:
+         *
+         * ```js
+         * import dgram from 'node:dgram';
+         *
+         * const server = dgram.createSocket('udp4');
+         *
+         * server.on('error', (err) => {
+         *   console.error(`server error:\n${err.stack}`);
+         *   server.close();
+         * });
+         *
+         * server.on('message', (msg, rinfo) => {
+         *   console.log(`server got: ${msg} from ${rinfo.address}:${rinfo.port}`);
+         * });
+         *
+         * server.on('listening', () => {
+         *   const address = server.address();
+         *   console.log(`server listening ${address.address}:${address.port}`);
+         * });
+         *
+         * server.bind(41234);
+         * // Prints: server listening 0.0.0.0:41234
+         * ```
+         * @since v0.1.99
+         * @param callback with no parameters. Called when binding is complete.
+         */
+        bind(port?: number, address?: string, callback?: () => void): this;
+        bind(port?: number, callback?: () => void): this;
+        bind(callback?: () => void): this;
+        bind(options: BindOptions, callback?: () => void): this;
+        /**
+         * Close the underlying socket and stop listening for data on it. If a callback is
+         * provided, it is added as a listener for the `'close'` event.
+         * @since v0.1.99
+         * @param callback Called when the socket has been closed.
+         */
+        close(callback?: () => void): this;
+        /**
+         * Associates the `dgram.Socket` to a remote address and port. Every
+         * message sent by this handle is automatically sent to that destination. Also,
+         * the socket will only receive messages from that remote peer.
+         * Trying to call `connect()` on an already connected socket will result
+         * in an `ERR_SOCKET_DGRAM_IS_CONNECTED` exception. If `address` is not
+         * provided, `'127.0.0.1'` (for `udp4` sockets) or `'::1'` (for `udp6` sockets)
+         * will be used by default. Once the connection is complete, a `'connect'` event
+         * is emitted and the optional `callback` function is called. In case of failure,
+         * the `callback` is called or, failing this, an `'error'` event is emitted.
+         * @since v12.0.0
+         * @param callback Called when the connection is completed or on error.
+         */
+        connect(port: number, address?: string, callback?: () => void): void;
+        connect(port: number, callback: () => void): void;
+        /**
+         * A synchronous function that disassociates a connected `dgram.Socket` from
+         * its remote address. Trying to call `disconnect()` on an unbound or already
+         * disconnected socket will result in an `ERR_SOCKET_DGRAM_NOT_CONNECTED` exception.
+         * @since v12.0.0
+         */
+        disconnect(): void;
+        /**
+         * Instructs the kernel to leave a multicast group at `multicastAddress` using the `IP_DROP_MEMBERSHIP` socket option. This method is automatically called by the
+         * kernel when the socket is closed or the process terminates, so most apps will
+         * never have reason to call this.
+         *
+         * If `multicastInterface` is not specified, the operating system will attempt to
+         * drop membership on all valid interfaces.
+         * @since v0.6.9
+         */
+        dropMembership(multicastAddress: string, multicastInterface?: string): void;
+        /**
+         * This method throws `ERR_SOCKET_BUFFER_SIZE` if called on an unbound socket.
+         * @since v8.7.0
+         * @return the `SO_RCVBUF` socket receive buffer size in bytes.
+         */
+        getRecvBufferSize(): number;
+        /**
+         * This method throws `ERR_SOCKET_BUFFER_SIZE` if called on an unbound socket.
+         * @since v8.7.0
+         * @return the `SO_SNDBUF` socket send buffer size in bytes.
+         */
+        getSendBufferSize(): number;
+        /**
+         * @since v18.8.0, v16.19.0
+         * @return Number of bytes queued for sending.
+         */
+        getSendQueueSize(): number;
+        /**
+         * @since v18.8.0, v16.19.0
+         * @return Number of send requests currently in the queue awaiting to be processed.
+         */
+        getSendQueueCount(): number;
+        /**
+         * By default, binding a socket will cause it to block the Node.js process from
+         * exiting as long as the socket is open. The `socket.unref()` method can be used
+         * to exclude the socket from the reference counting that keeps the Node.js
+         * process active. The `socket.ref()` method adds the socket back to the reference
+         * counting and restores the default behavior.
+         *
+         * Calling `socket.ref()` multiples times will have no additional effect.
+         *
+         * The `socket.ref()` method returns a reference to the socket so calls can be
+         * chained.
+         * @since v0.9.1
+         */
+        ref(): this;
+        /**
+         * Returns an object containing the `address`, `family`, and `port` of the remote
+         * endpoint. This method throws an `ERR_SOCKET_DGRAM_NOT_CONNECTED` exception
+         * if the socket is not connected.
+         * @since v12.0.0
+         */
+        remoteAddress(): AddressInfo;
+        /**
+         * Broadcasts a datagram on the socket.
+         * For connectionless sockets, the destination `port` and `address` must be
+         * specified. Connected sockets, on the other hand, will use their associated
+         * remote endpoint, so the `port` and `address` arguments must not be set.
+         *
+         * The `msg` argument contains the message to be sent.
+         * Depending on its type, different behavior can apply. If `msg` is a `Buffer`,
+         * any `TypedArray` or a `DataView`,
+         * the `offset` and `length` specify the offset within the `Buffer` where the
+         * message begins and the number of bytes in the message, respectively.
+         * If `msg` is a `String`, then it is automatically converted to a `Buffer` with `'utf8'` encoding. With messages that
+         * contain multi-byte characters, `offset` and `length` will be calculated with
+         * respect to `byte length` and not the character position.
+         * If `msg` is an array, `offset` and `length` must not be specified.
+         *
+         * The `address` argument is a string. If the value of `address` is a host name,
+         * DNS will be used to resolve the address of the host. If `address` is not
+         * provided or otherwise nullish, `'127.0.0.1'` (for `udp4` sockets) or `'::1'` (for `udp6` sockets) will be used by default.
+         *
+         * If the socket has not been previously bound with a call to `bind`, the socket
+         * is assigned a random port number and is bound to the "all interfaces" address
+         * (`'0.0.0.0'` for `udp4` sockets, `'::0'` for `udp6` sockets.)
+         *
+         * An optional `callback` function may be specified to as a way of reporting
+         * DNS errors or for determining when it is safe to reuse the `buf` object.
+         * DNS lookups delay the time to send for at least one tick of the
+         * Node.js event loop.
+         *
+         * The only way to know for sure that the datagram has been sent is by using a `callback`. If an error occurs and a `callback` is given, the error will be
+         * passed as the first argument to the `callback`. If a `callback` is not given,
+         * the error is emitted as an `'error'` event on the `socket` object.
+         *
+         * Offset and length are optional but both _must_ be set if either are used.
+         * They are supported only when the first argument is a `Buffer`, a `TypedArray`,
+         * or a `DataView`.
+         *
+         * This method throws `ERR_SOCKET_BAD_PORT` if called on an unbound socket.
+         *
+         * Example of sending a UDP packet to a port on `localhost`;
+         *
+         * ```js
+         * import dgram from 'node:dgram';
+         * import { Buffer } from 'node:buffer';
+         *
+         * const message = Buffer.from('Some bytes');
+         * const client = dgram.createSocket('udp4');
+         * client.send(message, 41234, 'localhost', (err) => {
+         *   client.close();
+         * });
+         * ```
+         *
+         * Example of sending a UDP packet composed of multiple buffers to a port on`127.0.0.1`;
+         *
+         * ```js
+         * import dgram from 'node:dgram';
+         * import { Buffer } from 'node:buffer';
+         *
+         * const buf1 = Buffer.from('Some ');
+         * const buf2 = Buffer.from('bytes');
+         * const client = dgram.createSocket('udp4');
+         * client.send([buf1, buf2], 41234, (err) => {
+         *   client.close();
+         * });
+         * ```
+         *
+         * Sending multiple buffers might be faster or slower depending on the
+         * application and operating system. Run benchmarks to
+         * determine the optimal strategy on a case-by-case basis. Generally speaking,
+         * however, sending multiple buffers is faster.
+         *
+         * Example of sending a UDP packet using a socket connected to a port on `localhost`:
+         *
+         * ```js
+         * import dgram from 'node:dgram';
+         * import { Buffer } from 'node:buffer';
+         *
+         * const message = Buffer.from('Some bytes');
+         * const client = dgram.createSocket('udp4');
+         * client.connect(41234, 'localhost', (err) => {
+         *   client.send(message, (err) => {
+         *     client.close();
+         *   });
+         * });
+         * ```
+         * @since v0.1.99
+         * @param msg Message to be sent.
+         * @param offset Offset in the buffer where the message starts.
+         * @param length Number of bytes in the message.
+         * @param port Destination port.
+         * @param address Destination host name or IP address.
+         * @param callback Called when the message has been sent.
+         */
+        send(
+            msg: string | NodeJS.ArrayBufferView | readonly any[],
+            port?: number,
+            address?: string,
+            callback?: (error: Error | null, bytes: number) => void,
+        ): void;
+        send(
+            msg: string | NodeJS.ArrayBufferView | readonly any[],
+            port?: number,
+            callback?: (error: Error | null, bytes: number) => void,
+        ): void;
+        send(
+            msg: string | NodeJS.ArrayBufferView | readonly any[],
+            callback?: (error: Error | null, bytes: number) => void,
+        ): void;
+        send(
+            msg: string | NodeJS.ArrayBufferView,
+            offset: number,
+            length: number,
+            port?: number,
+            address?: string,
+            callback?: (error: Error | null, bytes: number) => void,
+        ): void;
+        send(
+            msg: string | NodeJS.ArrayBufferView,
+            offset: number,
+            length: number,
+            port?: number,
+            callback?: (error: Error | null, bytes: number) => void,
+        ): void;
+        send(
+            msg: string | NodeJS.ArrayBufferView,
+            offset: number,
+            length: number,
+            callback?: (error: Error | null, bytes: number) => void,
+        ): void;
+        /**
+         * Sets or clears the `SO_BROADCAST` socket option. When set to `true`, UDP
+         * packets may be sent to a local interface's broadcast address.
+         *
+         * This method throws `EBADF` if called on an unbound socket.
+         * @since v0.6.9
+         */
+        setBroadcast(flag: boolean): void;
+        /**
+         * _All references to scope in this section are referring to [IPv6 Zone Indices](https://en.wikipedia.org/wiki/IPv6_address#Scoped_literal_IPv6_addresses), which are defined by [RFC
+         * 4007](https://tools.ietf.org/html/rfc4007). In string form, an IP_
+         * _with a scope index is written as `'IP%scope'` where scope is an interface name_
+         * _or interface number._
+         *
+         * Sets the default outgoing multicast interface of the socket to a chosen
+         * interface or back to system interface selection. The `multicastInterface` must
+         * be a valid string representation of an IP from the socket's family.
+         *
+         * For IPv4 sockets, this should be the IP configured for the desired physical
+         * interface. All packets sent to multicast on the socket will be sent on the
+         * interface determined by the most recent successful use of this call.
+         *
+         * For IPv6 sockets, `multicastInterface` should include a scope to indicate the
+         * interface as in the examples that follow. In IPv6, individual `send` calls can
+         * also use explicit scope in addresses, so only packets sent to a multicast
+         * address without specifying an explicit scope are affected by the most recent
+         * successful use of this call.
+         *
+         * This method throws `EBADF` if called on an unbound socket.
+         *
+         * #### Example: IPv6 outgoing multicast interface
+         *
+         * On most systems, where scope format uses the interface name:
+         *
+         * ```js
+         * const socket = dgram.createSocket('udp6');
+         *
+         * socket.bind(1234, () => {
+         *   socket.setMulticastInterface('::%eth1');
+         * });
+         * ```
+         *
+         * On Windows, where scope format uses an interface number:
+         *
+         * ```js
+         * const socket = dgram.createSocket('udp6');
+         *
+         * socket.bind(1234, () => {
+         *   socket.setMulticastInterface('::%2');
+         * });
+         * ```
+         *
+         * #### Example: IPv4 outgoing multicast interface
+         *
+         * All systems use an IP of the host on the desired physical interface:
+         *
+         * ```js
+         * const socket = dgram.createSocket('udp4');
+         *
+         * socket.bind(1234, () => {
+         *   socket.setMulticastInterface('10.0.0.2');
+         * });
+         * ```
+         * @since v8.6.0
+         */
+        setMulticastInterface(multicastInterface: string): void;
+        /**
+         * Sets or clears the `IP_MULTICAST_LOOP` socket option. When set to `true`,
+         * multicast packets will also be received on the local interface.
+         *
+         * This method throws `EBADF` if called on an unbound socket.
+         * @since v0.3.8
+         */
+        setMulticastLoopback(flag: boolean): boolean;
+        /**
+         * Sets the `IP_MULTICAST_TTL` socket option. While TTL generally stands for
+         * "Time to Live", in this context it specifies the number of IP hops that a
+         * packet is allowed to travel through, specifically for multicast traffic. Each
+         * router or gateway that forwards a packet decrements the TTL. If the TTL is
+         * decremented to 0 by a router, it will not be forwarded.
+         *
+         * The `ttl` argument may be between 0 and 255\. The default on most systems is `1`.
+         *
+         * This method throws `EBADF` if called on an unbound socket.
+         * @since v0.3.8
+         */
+        setMulticastTTL(ttl: number): number;
+        /**
+         * Sets the `SO_RCVBUF` socket option. Sets the maximum socket receive buffer
+         * in bytes.
+         *
+         * This method throws `ERR_SOCKET_BUFFER_SIZE` if called on an unbound socket.
+         * @since v8.7.0
+         */
+        setRecvBufferSize(size: number): void;
+        /**
+         * Sets the `SO_SNDBUF` socket option. Sets the maximum socket send buffer
+         * in bytes.
+         *
+         * This method throws `ERR_SOCKET_BUFFER_SIZE` if called on an unbound socket.
+         * @since v8.7.0
+         */
+        setSendBufferSize(size: number): void;
+        /**
+         * Sets the `IP_TTL` socket option. While TTL generally stands for "Time to Live",
+         * in this context it specifies the number of IP hops that a packet is allowed to
+         * travel through. Each router or gateway that forwards a packet decrements the
+         * TTL. If the TTL is decremented to 0 by a router, it will not be forwarded.
+         * Changing TTL values is typically done for network probes or when multicasting.
+         *
+         * The `ttl` argument may be between 1 and 255\. The default on most systems
+         * is 64.
+         *
+         * This method throws `EBADF` if called on an unbound socket.
+         * @since v0.1.101
+         */
+        setTTL(ttl: number): number;
+        /**
+         * By default, binding a socket will cause it to block the Node.js process from
+         * exiting as long as the socket is open. The `socket.unref()` method can be used
+         * to exclude the socket from the reference counting that keeps the Node.js
+         * process active, allowing the process to exit even if the socket is still
+         * listening.
+         *
+         * Calling `socket.unref()` multiple times will have no additional effect.
+         *
+         * The `socket.unref()` method returns a reference to the socket so calls can be
+         * chained.
+         * @since v0.9.1
+         */
+        unref(): this;
+        /**
+         * Tells the kernel to join a source-specific multicast channel at the given `sourceAddress` and `groupAddress`, using the `multicastInterface` with the `IP_ADD_SOURCE_MEMBERSHIP` socket
+         * option. If the `multicastInterface` argument
+         * is not specified, the operating system will choose one interface and will add
+         * membership to it. To add membership to every available interface, call `socket.addSourceSpecificMembership()` multiple times, once per interface.
+         *
+         * When called on an unbound socket, this method will implicitly bind to a random
+         * port, listening on all interfaces.
+         * @since v13.1.0, v12.16.0
+         */
+        addSourceSpecificMembership(sourceAddress: string, groupAddress: string, multicastInterface?: string): void;
+        /**
+         * Instructs the kernel to leave a source-specific multicast channel at the given `sourceAddress` and `groupAddress` using the `IP_DROP_SOURCE_MEMBERSHIP` socket option. This method is
+         * automatically called by the kernel when the
+         * socket is closed or the process terminates, so most apps will never have
+         * reason to call this.
+         *
+         * If `multicastInterface` is not specified, the operating system will attempt to
+         * drop membership on all valid interfaces.
+         * @since v13.1.0, v12.16.0
+         */
+        dropSourceSpecificMembership(sourceAddress: string, groupAddress: string, multicastInterface?: string): void;
+        /**
+         * Calls `socket.close()` and returns a promise that fulfills when the socket has closed.
+         * @since v20.5.0
+         */
+        [Symbol.asyncDispose](): Promise<void>;
+    }
+    interface Socket extends InternalEventEmitter<SocketEventMap> {}
+}
+declare module "dgram" {
+    export * from "node:dgram";
+}
diff --git a/mqtt-backend/node_modules/@types/node/diagnostics_channel.d.ts b/mqtt-backend/node_modules/@types/node/diagnostics_channel.d.ts
new file mode 100644
index 0000000..fa83612
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/diagnostics_channel.d.ts
@@ -0,0 +1,552 @@
+declare module "node:diagnostics_channel" {
+    import { AsyncLocalStorage } from "node:async_hooks";
+    /**
+     * Check if there are active subscribers to the named channel. This is helpful if
+     * the message you want to send might be expensive to prepare.
+     *
+     * This API is optional but helpful when trying to publish messages from very
+     * performance-sensitive code.
+     *
+     * ```js
+     * import diagnostics_channel from 'node:diagnostics_channel';
+     *
+     * if (diagnostics_channel.hasSubscribers('my-channel')) {
+     *   // There are subscribers, prepare and publish message
+     * }
+     * ```
+     * @since v15.1.0, v14.17.0
+     * @param name The channel name
+     * @return If there are active subscribers
+     */
+    function hasSubscribers(name: string | symbol): boolean;
+    /**
+     * This is the primary entry-point for anyone wanting to publish to a named
+     * channel. It produces a channel object which is optimized to reduce overhead at
+     * publish time as much as possible.
+     *
+     * ```js
+     * import diagnostics_channel from 'node:diagnostics_channel';
+     *
+     * const channel = diagnostics_channel.channel('my-channel');
+     * ```
+     * @since v15.1.0, v14.17.0
+     * @param name The channel name
+     * @return The named channel object
+     */
+    function channel(name: string | symbol): Channel;
+    type ChannelListener = (message: unknown, name: string | symbol) => void;
+    /**
+     * Register a message handler to subscribe to this channel. This message handler
+     * will be run synchronously whenever a message is published to the channel. Any
+     * errors thrown in the message handler will trigger an `'uncaughtException'`.
+     *
+     * ```js
+     * import diagnostics_channel from 'node:diagnostics_channel';
+     *
+     * diagnostics_channel.subscribe('my-channel', (message, name) => {
+     *   // Received data
+     * });
+     * ```
+     * @since v18.7.0, v16.17.0
+     * @param name The channel name
+     * @param onMessage The handler to receive channel messages
+     */
+    function subscribe(name: string | symbol, onMessage: ChannelListener): void;
+    /**
+     * Remove a message handler previously registered to this channel with {@link subscribe}.
+     *
+     * ```js
+     * import diagnostics_channel from 'node:diagnostics_channel';
+     *
+     * function onMessage(message, name) {
+     *   // Received data
+     * }
+     *
+     * diagnostics_channel.subscribe('my-channel', onMessage);
+     *
+     * diagnostics_channel.unsubscribe('my-channel', onMessage);
+     * ```
+     * @since v18.7.0, v16.17.0
+     * @param name The channel name
+     * @param onMessage The previous subscribed handler to remove
+     * @return `true` if the handler was found, `false` otherwise.
+     */
+    function unsubscribe(name: string | symbol, onMessage: ChannelListener): boolean;
+    /**
+     * Creates a `TracingChannel` wrapper for the given `TracingChannel Channels`. If a name is given, the corresponding tracing
+     * channels will be created in the form of `tracing:${name}:${eventType}` where `eventType` corresponds to the types of `TracingChannel Channels`.
+     *
+     * ```js
+     * import diagnostics_channel from 'node:diagnostics_channel';
+     *
+     * const channelsByName = diagnostics_channel.tracingChannel('my-channel');
+     *
+     * // or...
+     *
+     * const channelsByCollection = diagnostics_channel.tracingChannel({
+     *   start: diagnostics_channel.channel('tracing:my-channel:start'),
+     *   end: diagnostics_channel.channel('tracing:my-channel:end'),
+     *   asyncStart: diagnostics_channel.channel('tracing:my-channel:asyncStart'),
+     *   asyncEnd: diagnostics_channel.channel('tracing:my-channel:asyncEnd'),
+     *   error: diagnostics_channel.channel('tracing:my-channel:error'),
+     * });
+     * ```
+     * @since v19.9.0
+     * @experimental
+     * @param nameOrChannels Channel name or object containing all the `TracingChannel Channels`
+     * @return Collection of channels to trace with
+     */
+    function tracingChannel<
+        StoreType = unknown,
+        ContextType extends object = StoreType extends object ? StoreType : object,
+    >(
+        nameOrChannels: string | TracingChannelCollection<StoreType, ContextType>,
+    ): TracingChannel<StoreType, ContextType>;
+    /**
+     * The class `Channel` represents an individual named channel within the data
+     * pipeline. It is used to track subscribers and to publish messages when there
+     * are subscribers present. It exists as a separate object to avoid channel
+     * lookups at publish time, enabling very fast publish speeds and allowing
+     * for heavy use while incurring very minimal cost. Channels are created with {@link channel}, constructing a channel directly
+     * with `new Channel(name)` is not supported.
+     * @since v15.1.0, v14.17.0
+     */
+    class Channel<StoreType = unknown, ContextType = StoreType> {
+        readonly name: string | symbol;
+        /**
+         * Check if there are active subscribers to this channel. This is helpful if
+         * the message you want to send might be expensive to prepare.
+         *
+         * This API is optional but helpful when trying to publish messages from very
+         * performance-sensitive code.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         *
+         * const channel = diagnostics_channel.channel('my-channel');
+         *
+         * if (channel.hasSubscribers) {
+         *   // There are subscribers, prepare and publish message
+         * }
+         * ```
+         * @since v15.1.0, v14.17.0
+         */
+        readonly hasSubscribers: boolean;
+        private constructor(name: string | symbol);
+        /**
+         * Publish a message to any subscribers to the channel. This will trigger
+         * message handlers synchronously so they will execute within the same context.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         *
+         * const channel = diagnostics_channel.channel('my-channel');
+         *
+         * channel.publish({
+         *   some: 'message',
+         * });
+         * ```
+         * @since v15.1.0, v14.17.0
+         * @param message The message to send to the channel subscribers
+         */
+        publish(message: unknown): void;
+        /**
+         * Register a message handler to subscribe to this channel. This message handler
+         * will be run synchronously whenever a message is published to the channel. Any
+         * errors thrown in the message handler will trigger an `'uncaughtException'`.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         *
+         * const channel = diagnostics_channel.channel('my-channel');
+         *
+         * channel.subscribe((message, name) => {
+         *   // Received data
+         * });
+         * ```
+         * @since v15.1.0, v14.17.0
+         * @param onMessage The handler to receive channel messages
+         */
+        subscribe(onMessage: ChannelListener): void;
+        /**
+         * Remove a message handler previously registered to this channel with `channel.subscribe(onMessage)`.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         *
+         * const channel = diagnostics_channel.channel('my-channel');
+         *
+         * function onMessage(message, name) {
+         *   // Received data
+         * }
+         *
+         * channel.subscribe(onMessage);
+         *
+         * channel.unsubscribe(onMessage);
+         * ```
+         * @since v15.1.0, v14.17.0
+         * @param onMessage The previous subscribed handler to remove
+         * @return `true` if the handler was found, `false` otherwise.
+         */
+        unsubscribe(onMessage: ChannelListener): void;
+        /**
+         * When `channel.runStores(context, ...)` is called, the given context data
+         * will be applied to any store bound to the channel. If the store has already been
+         * bound the previous `transform` function will be replaced with the new one.
+         * The `transform` function may be omitted to set the given context data as the
+         * context directly.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         * import { AsyncLocalStorage } from 'node:async_hooks';
+         *
+         * const store = new AsyncLocalStorage();
+         *
+         * const channel = diagnostics_channel.channel('my-channel');
+         *
+         * channel.bindStore(store, (data) => {
+         *   return { data };
+         * });
+         * ```
+         * @since v19.9.0
+         * @experimental
+         * @param store The store to which to bind the context data
+         * @param transform Transform context data before setting the store context
+         */
+        bindStore(store: AsyncLocalStorage<StoreType>, transform?: (context: ContextType) => StoreType): void;
+        /**
+         * Remove a message handler previously registered to this channel with `channel.bindStore(store)`.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         * import { AsyncLocalStorage } from 'node:async_hooks';
+         *
+         * const store = new AsyncLocalStorage();
+         *
+         * const channel = diagnostics_channel.channel('my-channel');
+         *
+         * channel.bindStore(store);
+         * channel.unbindStore(store);
+         * ```
+         * @since v19.9.0
+         * @experimental
+         * @param store The store to unbind from the channel.
+         * @return `true` if the store was found, `false` otherwise.
+         */
+        unbindStore(store: AsyncLocalStorage<StoreType>): boolean;
+        /**
+         * Applies the given data to any AsyncLocalStorage instances bound to the channel
+         * for the duration of the given function, then publishes to the channel within
+         * the scope of that data is applied to the stores.
+         *
+         * If a transform function was given to `channel.bindStore(store)` it will be
+         * applied to transform the message data before it becomes the context value for
+         * the store. The prior storage context is accessible from within the transform
+         * function in cases where context linking is required.
+         *
+         * The context applied to the store should be accessible in any async code which
+         * continues from execution which began during the given function, however
+         * there are some situations in which `context loss` may occur.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         * import { AsyncLocalStorage } from 'node:async_hooks';
+         *
+         * const store = new AsyncLocalStorage();
+         *
+         * const channel = diagnostics_channel.channel('my-channel');
+         *
+         * channel.bindStore(store, (message) => {
+         *   const parent = store.getStore();
+         *   return new Span(message, parent);
+         * });
+         * channel.runStores({ some: 'message' }, () => {
+         *   store.getStore(); // Span({ some: 'message' })
+         * });
+         * ```
+         * @since v19.9.0
+         * @experimental
+         * @param context Message to send to subscribers and bind to stores
+         * @param fn Handler to run within the entered storage context
+         * @param thisArg The receiver to be used for the function call.
+         * @param args Optional arguments to pass to the function.
+         */
+        runStores<ThisArg = any, Args extends any[] = any[], Result = any>(
+            context: ContextType,
+            fn: (this: ThisArg, ...args: Args) => Result,
+            thisArg?: ThisArg,
+            ...args: Args
+        ): Result;
+    }
+    interface TracingChannelSubscribers<ContextType extends object> {
+        start: (message: ContextType) => void;
+        end: (
+            message: ContextType & {
+                error?: unknown;
+                result?: unknown;
+            },
+        ) => void;
+        asyncStart: (
+            message: ContextType & {
+                error?: unknown;
+                result?: unknown;
+            },
+        ) => void;
+        asyncEnd: (
+            message: ContextType & {
+                error?: unknown;
+                result?: unknown;
+            },
+        ) => void;
+        error: (
+            message: ContextType & {
+                error: unknown;
+            },
+        ) => void;
+    }
+    interface TracingChannelCollection<StoreType = unknown, ContextType = StoreType> {
+        start: Channel<StoreType, ContextType>;
+        end: Channel<StoreType, ContextType>;
+        asyncStart: Channel<StoreType, ContextType>;
+        asyncEnd: Channel<StoreType, ContextType>;
+        error: Channel<StoreType, ContextType>;
+    }
+    /**
+     * The class `TracingChannel` is a collection of `TracingChannel Channels` which
+     * together express a single traceable action. It is used to formalize and
+     * simplify the process of producing events for tracing application flow. {@link tracingChannel} is used to construct a `TracingChannel`. As with `Channel` it is recommended to create and reuse a
+     * single `TracingChannel` at the top-level of the file rather than creating them
+     * dynamically.
+     * @since v19.9.0
+     * @experimental
+     */
+    class TracingChannel<StoreType = unknown, ContextType extends object = {}> implements TracingChannelCollection {
+        start: Channel<StoreType, ContextType>;
+        end: Channel<StoreType, ContextType>;
+        asyncStart: Channel<StoreType, ContextType>;
+        asyncEnd: Channel<StoreType, ContextType>;
+        error: Channel<StoreType, ContextType>;
+        /**
+         * Helper to subscribe a collection of functions to the corresponding channels.
+         * This is the same as calling `channel.subscribe(onMessage)` on each channel
+         * individually.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         *
+         * const channels = diagnostics_channel.tracingChannel('my-channel');
+         *
+         * channels.subscribe({
+         *   start(message) {
+         *     // Handle start message
+         *   },
+         *   end(message) {
+         *     // Handle end message
+         *   },
+         *   asyncStart(message) {
+         *     // Handle asyncStart message
+         *   },
+         *   asyncEnd(message) {
+         *     // Handle asyncEnd message
+         *   },
+         *   error(message) {
+         *     // Handle error message
+         *   },
+         * });
+         * ```
+         * @since v19.9.0
+         * @experimental
+         * @param subscribers Set of `TracingChannel Channels` subscribers
+         */
+        subscribe(subscribers: TracingChannelSubscribers<ContextType>): void;
+        /**
+         * Helper to unsubscribe a collection of functions from the corresponding channels.
+         * This is the same as calling `channel.unsubscribe(onMessage)` on each channel
+         * individually.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         *
+         * const channels = diagnostics_channel.tracingChannel('my-channel');
+         *
+         * channels.unsubscribe({
+         *   start(message) {
+         *     // Handle start message
+         *   },
+         *   end(message) {
+         *     // Handle end message
+         *   },
+         *   asyncStart(message) {
+         *     // Handle asyncStart message
+         *   },
+         *   asyncEnd(message) {
+         *     // Handle asyncEnd message
+         *   },
+         *   error(message) {
+         *     // Handle error message
+         *   },
+         * });
+         * ```
+         * @since v19.9.0
+         * @experimental
+         * @param subscribers Set of `TracingChannel Channels` subscribers
+         * @return `true` if all handlers were successfully unsubscribed, and `false` otherwise.
+         */
+        unsubscribe(subscribers: TracingChannelSubscribers<ContextType>): void;
+        /**
+         * Trace a synchronous function call. This will always produce a `start event` and `end event` around the execution and may produce an `error event` if the given function throws an error.
+         * This will run the given function using `channel.runStores(context, ...)` on the `start` channel which ensures all
+         * events should have any bound stores set to match this trace context.
+         *
+         * To ensure only correct trace graphs are formed, events will only be published if subscribers are present prior to starting the trace. Subscriptions
+         * which are added after the trace begins will not receive future events from that trace, only future traces will be seen.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         *
+         * const channels = diagnostics_channel.tracingChannel('my-channel');
+         *
+         * channels.traceSync(() => {
+         *   // Do something
+         * }, {
+         *   some: 'thing',
+         * });
+         * ```
+         * @since v19.9.0
+         * @experimental
+         * @param fn Function to wrap a trace around
+         * @param context Shared object to correlate events through
+         * @param thisArg The receiver to be used for the function call
+         * @param args Optional arguments to pass to the function
+         * @return The return value of the given function
+         */
+        traceSync<ThisArg = any, Args extends any[] = any[], Result = any>(
+            fn: (this: ThisArg, ...args: Args) => Result,
+            context?: ContextType,
+            thisArg?: ThisArg,
+            ...args: Args
+        ): Result;
+        /**
+         * Trace a promise-returning function call. This will always produce a `start event` and `end event` around the synchronous portion of the
+         * function execution, and will produce an `asyncStart event` and `asyncEnd event` when a promise continuation is reached. It may also
+         * produce an `error event` if the given function throws an error or the
+         * returned promise rejects. This will run the given function using `channel.runStores(context, ...)` on the `start` channel which ensures all
+         * events should have any bound stores set to match this trace context.
+         *
+         * To ensure only correct trace graphs are formed, events will only be published if subscribers are present prior to starting the trace. Subscriptions
+         * which are added after the trace begins will not receive future events from that trace, only future traces will be seen.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         *
+         * const channels = diagnostics_channel.tracingChannel('my-channel');
+         *
+         * channels.tracePromise(async () => {
+         *   // Do something
+         * }, {
+         *   some: 'thing',
+         * });
+         * ```
+         * @since v19.9.0
+         * @experimental
+         * @param fn Promise-returning function to wrap a trace around
+         * @param context Shared object to correlate trace events through
+         * @param thisArg The receiver to be used for the function call
+         * @param args Optional arguments to pass to the function
+         * @return Chained from promise returned by the given function
+         */
+        tracePromise<ThisArg = any, Args extends any[] = any[], Result = any>(
+            fn: (this: ThisArg, ...args: Args) => Promise<Result>,
+            context?: ContextType,
+            thisArg?: ThisArg,
+            ...args: Args
+        ): Promise<Result>;
+        /**
+         * Trace a callback-receiving function call. This will always produce a `start event` and `end event` around the synchronous portion of the
+         * function execution, and will produce a `asyncStart event` and `asyncEnd event` around the callback execution. It may also produce an `error event` if the given function throws an error or
+         * the returned
+         * promise rejects. This will run the given function using `channel.runStores(context, ...)` on the `start` channel which ensures all
+         * events should have any bound stores set to match this trace context.
+         *
+         * The `position` will be -1 by default to indicate the final argument should
+         * be used as the callback.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         *
+         * const channels = diagnostics_channel.tracingChannel('my-channel');
+         *
+         * channels.traceCallback((arg1, callback) => {
+         *   // Do something
+         *   callback(null, 'result');
+         * }, 1, {
+         *   some: 'thing',
+         * }, thisArg, arg1, callback);
+         * ```
+         *
+         * The callback will also be run with `channel.runStores(context, ...)` which
+         * enables context loss recovery in some cases.
+         *
+         * To ensure only correct trace graphs are formed, events will only be published if subscribers are present prior to starting the trace. Subscriptions
+         * which are added after the trace begins will not receive future events from that trace, only future traces will be seen.
+         *
+         * ```js
+         * import diagnostics_channel from 'node:diagnostics_channel';
+         * import { AsyncLocalStorage } from 'node:async_hooks';
+         *
+         * const channels = diagnostics_channel.tracingChannel('my-channel');
+         * const myStore = new AsyncLocalStorage();
+         *
+         * // The start channel sets the initial store data to something
+         * // and stores that store data value on the trace context object
+         * channels.start.bindStore(myStore, (data) => {
+         *   const span = new Span(data);
+         *   data.span = span;
+         *   return span;
+         * });
+         *
+         * // Then asyncStart can restore from that data it stored previously
+         * channels.asyncStart.bindStore(myStore, (data) => {
+         *   return data.span;
+         * });
+         * ```
+         * @since v19.9.0
+         * @experimental
+         * @param fn callback using function to wrap a trace around
+         * @param position Zero-indexed argument position of expected callback
+         * @param context Shared object to correlate trace events through
+         * @param thisArg The receiver to be used for the function call
+         * @param args Optional arguments to pass to the function
+         * @return The return value of the given function
+         */
+        traceCallback<ThisArg = any, Args extends any[] = any[], Result = any>(
+            fn: (this: ThisArg, ...args: Args) => Result,
+            position?: number,
+            context?: ContextType,
+            thisArg?: ThisArg,
+            ...args: Args
+        ): Result;
+        /**
+         * `true` if any of the individual channels has a subscriber, `false` if not.
+         *
+         * This is a helper method available on a {@link TracingChannel} instance to check
+         * if any of the [TracingChannel Channels](https://nodejs.org/api/diagnostics_channel.html#tracingchannel-channels) have subscribers.
+         * A `true` is returned if any of them have at least one subscriber, a `false` is returned otherwise.
+         *
+         * ```js
+         * const diagnostics_channel = require('node:diagnostics_channel');
+         *
+         * const channels = diagnostics_channel.tracingChannel('my-channel');
+         *
+         * if (channels.hasSubscribers) {
+         *   // Do something
+         * }
+         * ```
+         * @since v22.0.0, v20.13.0
+         */
+        readonly hasSubscribers: boolean;
+    }
+}
+declare module "diagnostics_channel" {
+    export * from "node:diagnostics_channel";
+}
diff --git a/mqtt-backend/node_modules/@types/node/dns.d.ts b/mqtt-backend/node_modules/@types/node/dns.d.ts
new file mode 100644
index 0000000..2e0941e
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/dns.d.ts
@@ -0,0 +1,876 @@
+declare module "node:dns" {
+    // Supported getaddrinfo flags.
+    /**
+     * Limits returned address types to the types of non-loopback addresses configured on the system. For example, IPv4 addresses are
+     * only returned if the current system has at least one IPv4 address configured.
+     */
+    const ADDRCONFIG: number;
+    /**
+     * If the IPv6 family was specified, but no IPv6 addresses were found, then return IPv4 mapped IPv6 addresses. It is not supported
+     * on some operating systems (e.g. FreeBSD 10.1).
+     */
+    const V4MAPPED: number;
+    /**
+     * If `dns.V4MAPPED` is specified, return resolved IPv6 addresses as
+     * well as IPv4 mapped IPv6 addresses.
+     */
+    const ALL: number;
+    interface LookupOptions {
+        /**
+         * The record family. Must be `4`, `6`, or `0`. For backward compatibility reasons, `'IPv4'` and `'IPv6'` are interpreted
+         * as `4` and `6` respectively. The value 0 indicates that either an IPv4 or IPv6 address is returned. If the value `0` is used
+         * with `{ all: true } (see below)`, both IPv4 and IPv6 addresses are returned.
+         * @default 0
+         */
+        family?: number | "IPv4" | "IPv6" | undefined;
+        /**
+         * One or more [supported `getaddrinfo`](https://nodejs.org/docs/latest-v25.x/api/dns.html#supported-getaddrinfo-flags) flags. Multiple flags may be
+         * passed by bitwise `OR`ing their values.
+         */
+        hints?: number | undefined;
+        /**
+         * When `true`, the callback returns all resolved addresses in an array. Otherwise, returns a single address.
+         * @default false
+         */
+        all?: boolean | undefined;
+        /**
+         * When `verbatim`, the resolved addresses are return unsorted. When `ipv4first`, the resolved addresses are sorted
+         * by placing IPv4 addresses before IPv6 addresses. When `ipv6first`, the resolved addresses are sorted by placing IPv6
+         * addresses before IPv4 addresses. Default value is configurable using
+         * {@link setDefaultResultOrder} or [`--dns-result-order`](https://nodejs.org/docs/latest-v25.x/api/cli.html#--dns-result-orderorder).
+         * @default `verbatim` (addresses are not reordered)
+         * @since v22.1.0
+         */
+        order?: "ipv4first" | "ipv6first" | "verbatim" | undefined;
+        /**
+         * When `true`, the callback receives IPv4 and IPv6 addresses in the order the DNS resolver returned them. When `false`, IPv4
+         * addresses are placed before IPv6 addresses. This option will be deprecated in favor of `order`. When both are specified,
+         * `order` has higher precedence. New code should only use `order`. Default value is configurable using {@link setDefaultResultOrder}
+         * @default true (addresses are not reordered)
+         * @deprecated Please use `order` option
+         */
+        verbatim?: boolean | undefined;
+    }
+    interface LookupOneOptions extends LookupOptions {
+        all?: false | undefined;
+    }
+    interface LookupAllOptions extends LookupOptions {
+        all: true;
+    }
+    interface LookupAddress {
+        /**
+         * A string representation of an IPv4 or IPv6 address.
+         */
+        address: string;
+        /**
+         * `4` or `6`, denoting the family of `address`, or `0` if the address is not an IPv4 or IPv6 address. `0` is a likely indicator of a
+         * bug in the name resolution service used by the operating system.
+         */
+        family: number;
+    }
+    /**
+     * Resolves a host name (e.g. `'nodejs.org'`) into the first found A (IPv4) or
+     * AAAA (IPv6) record. All `option` properties are optional. If `options` is an
+     * integer, then it must be `4` or `6` – if `options` is `0` or not provided, then
+     * IPv4 and IPv6 addresses are both returned if found.
+     *
+     * With the `all` option set to `true`, the arguments for `callback` change to `(err, addresses)`, with `addresses` being an array of objects with the
+     * properties `address` and `family`.
+     *
+     * On error, `err` is an `Error` object, where `err.code` is the error code.
+     * Keep in mind that `err.code` will be set to `'ENOTFOUND'` not only when
+     * the host name does not exist but also when the lookup fails in other ways
+     * such as no available file descriptors.
+     *
+     * `dns.lookup()` does not necessarily have anything to do with the DNS protocol.
+     * The implementation uses an operating system facility that can associate names
+     * with addresses and vice versa. This implementation can have subtle but
+     * important consequences on the behavior of any Node.js program. Please take some
+     * time to consult the [Implementation considerations section](https://nodejs.org/docs/latest-v25.x/api/dns.html#implementation-considerations)
+     * before using `dns.lookup()`.
+     *
+     * Example usage:
+     *
+     * ```js
+     * import dns from 'node:dns';
+     * const options = {
+     *   family: 6,
+     *   hints: dns.ADDRCONFIG | dns.V4MAPPED,
+     * };
+     * dns.lookup('example.com', options, (err, address, family) =>
+     *   console.log('address: %j family: IPv%s', address, family));
+     * // address: "2606:2800:220:1:248:1893:25c8:1946" family: IPv6
+     *
+     * // When options.all is true, the result will be an Array.
+     * options.all = true;
+     * dns.lookup('example.com', options, (err, addresses) =>
+     *   console.log('addresses: %j', addresses));
+     * // addresses: [{"address":"2606:2800:220:1:248:1893:25c8:1946","family":6}]
+     * ```
+     *
+     * If this method is invoked as its [util.promisify()](https://nodejs.org/docs/latest-v25.x/api/util.html#utilpromisifyoriginal) ed
+     * version, and `all` is not set to `true`, it returns a `Promise` for an `Object` with `address` and `family` properties.
+     * @since v0.1.90
+     */
+    function lookup(
+        hostname: string,
+        family: number,
+        callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void,
+    ): void;
+    function lookup(
+        hostname: string,
+        options: LookupOneOptions,
+        callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void,
+    ): void;
+    function lookup(
+        hostname: string,
+        options: LookupAllOptions,
+        callback: (err: NodeJS.ErrnoException | null, addresses: LookupAddress[]) => void,
+    ): void;
+    function lookup(
+        hostname: string,
+        options: LookupOptions,
+        callback: (err: NodeJS.ErrnoException | null, address: string | LookupAddress[], family: number) => void,
+    ): void;
+    function lookup(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, address: string, family: number) => void,
+    ): void;
+    namespace lookup {
+        function __promisify__(hostname: string, options: LookupAllOptions): Promise<LookupAddress[]>;
+        function __promisify__(hostname: string, options?: LookupOneOptions | number): Promise<LookupAddress>;
+        function __promisify__(hostname: string, options: LookupOptions): Promise<LookupAddress | LookupAddress[]>;
+    }
+    /**
+     * Resolves the given `address` and `port` into a host name and service using
+     * the operating system's underlying `getnameinfo` implementation.
+     *
+     * If `address` is not a valid IP address, a `TypeError` will be thrown.
+     * The `port` will be coerced to a number. If it is not a legal port, a `TypeError` will be thrown.
+     *
+     * On an error, `err` is an [`Error`](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-error) object,
+     * where `err.code` is the error code.
+     *
+     * ```js
+     * import dns from 'node:dns';
+     * dns.lookupService('127.0.0.1', 22, (err, hostname, service) => {
+     *   console.log(hostname, service);
+     *   // Prints: localhost ssh
+     * });
+     * ```
+     *
+     * If this method is invoked as its [util.promisify()](https://nodejs.org/docs/latest-v25.x/api/util.html#utilpromisifyoriginal) ed
+     * version, it returns a `Promise` for an `Object` with `hostname` and `service` properties.
+     * @since v0.11.14
+     */
+    function lookupService(
+        address: string,
+        port: number,
+        callback: (err: NodeJS.ErrnoException | null, hostname: string, service: string) => void,
+    ): void;
+    namespace lookupService {
+        function __promisify__(
+            address: string,
+            port: number,
+        ): Promise<{
+            hostname: string;
+            service: string;
+        }>;
+    }
+    interface ResolveOptions {
+        ttl: boolean;
+    }
+    interface ResolveWithTtlOptions extends ResolveOptions {
+        ttl: true;
+    }
+    interface RecordWithTtl {
+        address: string;
+        ttl: number;
+    }
+    interface AnyARecord extends RecordWithTtl {
+        type: "A";
+    }
+    interface AnyAaaaRecord extends RecordWithTtl {
+        type: "AAAA";
+    }
+    interface CaaRecord {
+        critical: number;
+        issue?: string | undefined;
+        issuewild?: string | undefined;
+        iodef?: string | undefined;
+        contactemail?: string | undefined;
+        contactphone?: string | undefined;
+    }
+    interface AnyCaaRecord extends CaaRecord {
+        type: "CAA";
+    }
+    interface MxRecord {
+        priority: number;
+        exchange: string;
+    }
+    interface AnyMxRecord extends MxRecord {
+        type: "MX";
+    }
+    interface NaptrRecord {
+        flags: string;
+        service: string;
+        regexp: string;
+        replacement: string;
+        order: number;
+        preference: number;
+    }
+    interface AnyNaptrRecord extends NaptrRecord {
+        type: "NAPTR";
+    }
+    interface SoaRecord {
+        nsname: string;
+        hostmaster: string;
+        serial: number;
+        refresh: number;
+        retry: number;
+        expire: number;
+        minttl: number;
+    }
+    interface AnySoaRecord extends SoaRecord {
+        type: "SOA";
+    }
+    interface SrvRecord {
+        priority: number;
+        weight: number;
+        port: number;
+        name: string;
+    }
+    interface AnySrvRecord extends SrvRecord {
+        type: "SRV";
+    }
+    interface TlsaRecord {
+        certUsage: number;
+        selector: number;
+        match: number;
+        data: ArrayBuffer;
+    }
+    interface AnyTlsaRecord extends TlsaRecord {
+        type: "TLSA";
+    }
+    interface AnyTxtRecord {
+        type: "TXT";
+        entries: string[];
+    }
+    interface AnyNsRecord {
+        type: "NS";
+        value: string;
+    }
+    interface AnyPtrRecord {
+        type: "PTR";
+        value: string;
+    }
+    interface AnyCnameRecord {
+        type: "CNAME";
+        value: string;
+    }
+    type AnyRecord =
+        | AnyARecord
+        | AnyAaaaRecord
+        | AnyCaaRecord
+        | AnyCnameRecord
+        | AnyMxRecord
+        | AnyNaptrRecord
+        | AnyNsRecord
+        | AnyPtrRecord
+        | AnySoaRecord
+        | AnySrvRecord
+        | AnyTlsaRecord
+        | AnyTxtRecord;
+    /**
+     * Uses the DNS protocol to resolve a host name (e.g. `'nodejs.org'`) into an array
+     * of the resource records. The `callback` function has arguments `(err, records)`. When successful, `records` will be an array of resource
+     * records. The type and structure of individual results varies based on `rrtype`:
+     *
+     * <omitted>
+     *
+     * On error, `err` is an [`Error`](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-error) object,
+     * where `err.code` is one of the `DNS error codes`.
+     * @since v0.1.27
+     * @param hostname Host name to resolve.
+     * @param [rrtype='A'] Resource record type.
+     */
+    function resolve(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
+    ): void;
+    function resolve(
+        hostname: string,
+        rrtype: "A" | "AAAA" | "CNAME" | "NS" | "PTR",
+        callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
+    ): void;
+    function resolve(
+        hostname: string,
+        rrtype: "ANY",
+        callback: (err: NodeJS.ErrnoException | null, addresses: AnyRecord[]) => void,
+    ): void;
+    function resolve(
+        hostname: string,
+        rrtype: "CAA",
+        callback: (err: NodeJS.ErrnoException | null, address: CaaRecord[]) => void,
+    ): void;
+    function resolve(
+        hostname: string,
+        rrtype: "MX",
+        callback: (err: NodeJS.ErrnoException | null, addresses: MxRecord[]) => void,
+    ): void;
+    function resolve(
+        hostname: string,
+        rrtype: "NAPTR",
+        callback: (err: NodeJS.ErrnoException | null, addresses: NaptrRecord[]) => void,
+    ): void;
+    function resolve(
+        hostname: string,
+        rrtype: "SOA",
+        callback: (err: NodeJS.ErrnoException | null, addresses: SoaRecord) => void,
+    ): void;
+    function resolve(
+        hostname: string,
+        rrtype: "SRV",
+        callback: (err: NodeJS.ErrnoException | null, addresses: SrvRecord[]) => void,
+    ): void;
+    function resolve(
+        hostname: string,
+        rrtype: "TLSA",
+        callback: (err: NodeJS.ErrnoException | null, addresses: TlsaRecord[]) => void,
+    ): void;
+    function resolve(
+        hostname: string,
+        rrtype: "TXT",
+        callback: (err: NodeJS.ErrnoException | null, addresses: string[][]) => void,
+    ): void;
+    function resolve(
+        hostname: string,
+        rrtype: string,
+        callback: (
+            err: NodeJS.ErrnoException | null,
+            addresses:
+                | string[]
+                | CaaRecord[]
+                | MxRecord[]
+                | NaptrRecord[]
+                | SoaRecord
+                | SrvRecord[]
+                | TlsaRecord[]
+                | string[][]
+                | AnyRecord[],
+        ) => void,
+    ): void;
+    namespace resolve {
+        function __promisify__(hostname: string, rrtype?: "A" | "AAAA" | "CNAME" | "NS" | "PTR"): Promise<string[]>;
+        function __promisify__(hostname: string, rrtype: "ANY"): Promise<AnyRecord[]>;
+        function __promisify__(hostname: string, rrtype: "CAA"): Promise<CaaRecord[]>;
+        function __promisify__(hostname: string, rrtype: "MX"): Promise<MxRecord[]>;
+        function __promisify__(hostname: string, rrtype: "NAPTR"): Promise<NaptrRecord[]>;
+        function __promisify__(hostname: string, rrtype: "SOA"): Promise<SoaRecord>;
+        function __promisify__(hostname: string, rrtype: "SRV"): Promise<SrvRecord[]>;
+        function __promisify__(hostname: string, rrtype: "TLSA"): Promise<TlsaRecord[]>;
+        function __promisify__(hostname: string, rrtype: "TXT"): Promise<string[][]>;
+        function __promisify__(
+            hostname: string,
+            rrtype: string,
+        ): Promise<
+            | string[]
+            | CaaRecord[]
+            | MxRecord[]
+            | NaptrRecord[]
+            | SoaRecord
+            | SrvRecord[]
+            | TlsaRecord[]
+            | string[][]
+            | AnyRecord[]
+        >;
+    }
+    /**
+     * Uses the DNS protocol to resolve a IPv4 addresses (`A` records) for the `hostname`. The `addresses` argument passed to the `callback` function
+     * will contain an array of IPv4 addresses (e.g.`['74.125.79.104', '74.125.79.105', '74.125.79.106']`).
+     * @since v0.1.16
+     * @param hostname Host name to resolve.
+     */
+    function resolve4(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
+    ): void;
+    function resolve4(
+        hostname: string,
+        options: ResolveWithTtlOptions,
+        callback: (err: NodeJS.ErrnoException | null, addresses: RecordWithTtl[]) => void,
+    ): void;
+    function resolve4(
+        hostname: string,
+        options: ResolveOptions,
+        callback: (err: NodeJS.ErrnoException | null, addresses: string[] | RecordWithTtl[]) => void,
+    ): void;
+    namespace resolve4 {
+        function __promisify__(hostname: string): Promise<string[]>;
+        function __promisify__(hostname: string, options: ResolveWithTtlOptions): Promise<RecordWithTtl[]>;
+        function __promisify__(hostname: string, options?: ResolveOptions): Promise<string[] | RecordWithTtl[]>;
+    }
+    /**
+     * Uses the DNS protocol to resolve IPv6 addresses (`AAAA` records) for the `hostname`. The `addresses` argument passed to the `callback` function
+     * will contain an array of IPv6 addresses.
+     * @since v0.1.16
+     * @param hostname Host name to resolve.
+     */
+    function resolve6(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
+    ): void;
+    function resolve6(
+        hostname: string,
+        options: ResolveWithTtlOptions,
+        callback: (err: NodeJS.ErrnoException | null, addresses: RecordWithTtl[]) => void,
+    ): void;
+    function resolve6(
+        hostname: string,
+        options: ResolveOptions,
+        callback: (err: NodeJS.ErrnoException | null, addresses: string[] | RecordWithTtl[]) => void,
+    ): void;
+    namespace resolve6 {
+        function __promisify__(hostname: string): Promise<string[]>;
+        function __promisify__(hostname: string, options: ResolveWithTtlOptions): Promise<RecordWithTtl[]>;
+        function __promisify__(hostname: string, options?: ResolveOptions): Promise<string[] | RecordWithTtl[]>;
+    }
+    /**
+     * Uses the DNS protocol to resolve `CNAME` records for the `hostname`. The `addresses` argument passed to the `callback` function
+     * will contain an array of canonical name records available for the `hostname` (e.g. `['bar.example.com']`).
+     * @since v0.3.2
+     */
+    function resolveCname(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
+    ): void;
+    namespace resolveCname {
+        function __promisify__(hostname: string): Promise<string[]>;
+    }
+    /**
+     * Uses the DNS protocol to resolve `CAA` records for the `hostname`. The `addresses` argument passed to the `callback` function
+     * will contain an array of certification authority authorization records
+     * available for the `hostname` (e.g. `[{critical: 0, iodef: 'mailto:pki@example.com'}, {critical: 128, issue: 'pki.example.com'}]`).
+     * @since v15.0.0, v14.17.0
+     */
+    function resolveCaa(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, records: CaaRecord[]) => void,
+    ): void;
+    namespace resolveCaa {
+        function __promisify__(hostname: string): Promise<CaaRecord[]>;
+    }
+    /**
+     * Uses the DNS protocol to resolve mail exchange records (`MX` records) for the `hostname`. The `addresses` argument passed to the `callback` function will
+     * contain an array of objects containing both a `priority` and `exchange` property (e.g. `[{priority: 10, exchange: 'mx.example.com'}, ...]`).
+     * @since v0.1.27
+     */
+    function resolveMx(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: MxRecord[]) => void,
+    ): void;
+    namespace resolveMx {
+        function __promisify__(hostname: string): Promise<MxRecord[]>;
+    }
+    /**
+     * Uses the DNS protocol to resolve regular expression-based records (`NAPTR` records) for the `hostname`. The `addresses` argument passed to the `callback` function will contain an array of
+     * objects with the following properties:
+     *
+     * * `flags`
+     * * `service`
+     * * `regexp`
+     * * `replacement`
+     * * `order`
+     * * `preference`
+     *
+     * ```js
+     * {
+     *   flags: 's',
+     *   service: 'SIP+D2U',
+     *   regexp: '',
+     *   replacement: '_sip._udp.example.com',
+     *   order: 30,
+     *   preference: 100
+     * }
+     * ```
+     * @since v0.9.12
+     */
+    function resolveNaptr(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: NaptrRecord[]) => void,
+    ): void;
+    namespace resolveNaptr {
+        function __promisify__(hostname: string): Promise<NaptrRecord[]>;
+    }
+    /**
+     * Uses the DNS protocol to resolve name server records (`NS` records) for the `hostname`. The `addresses` argument passed to the `callback` function will
+     * contain an array of name server records available for `hostname` (e.g. `['ns1.example.com', 'ns2.example.com']`).
+     * @since v0.1.90
+     */
+    function resolveNs(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
+    ): void;
+    namespace resolveNs {
+        function __promisify__(hostname: string): Promise<string[]>;
+    }
+    /**
+     * Uses the DNS protocol to resolve pointer records (`PTR` records) for the `hostname`. The `addresses` argument passed to the `callback` function will
+     * be an array of strings containing the reply records.
+     * @since v6.0.0
+     */
+    function resolvePtr(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: string[]) => void,
+    ): void;
+    namespace resolvePtr {
+        function __promisify__(hostname: string): Promise<string[]>;
+    }
+    /**
+     * Uses the DNS protocol to resolve a start of authority record (`SOA` record) for
+     * the `hostname`. The `address` argument passed to the `callback` function will
+     * be an object with the following properties:
+     *
+     * * `nsname`
+     * * `hostmaster`
+     * * `serial`
+     * * `refresh`
+     * * `retry`
+     * * `expire`
+     * * `minttl`
+     *
+     * ```js
+     * {
+     *   nsname: 'ns.example.com',
+     *   hostmaster: 'root.example.com',
+     *   serial: 2013101809,
+     *   refresh: 10000,
+     *   retry: 2400,
+     *   expire: 604800,
+     *   minttl: 3600
+     * }
+     * ```
+     * @since v0.11.10
+     */
+    function resolveSoa(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, address: SoaRecord) => void,
+    ): void;
+    namespace resolveSoa {
+        function __promisify__(hostname: string): Promise<SoaRecord>;
+    }
+    /**
+     * Uses the DNS protocol to resolve service records (`SRV` records) for the `hostname`. The `addresses` argument passed to the `callback` function will
+     * be an array of objects with the following properties:
+     *
+     * * `priority`
+     * * `weight`
+     * * `port`
+     * * `name`
+     *
+     * ```js
+     * {
+     *   priority: 10,
+     *   weight: 5,
+     *   port: 21223,
+     *   name: 'service.example.com'
+     * }
+     * ```
+     * @since v0.1.27
+     */
+    function resolveSrv(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: SrvRecord[]) => void,
+    ): void;
+    namespace resolveSrv {
+        function __promisify__(hostname: string): Promise<SrvRecord[]>;
+    }
+    /**
+     * Uses the DNS protocol to resolve certificate associations (`TLSA` records) for
+     * the `hostname`. The `records` argument passed to the `callback` function is an
+     * array of objects with these properties:
+     *
+     * * `certUsage`
+     * * `selector`
+     * * `match`
+     * * `data`
+     *
+     * ```js
+     * {
+     *   certUsage: 3,
+     *   selector: 1,
+     *   match: 1,
+     *   data: [ArrayBuffer]
+     * }
+     * ```
+     * @since v23.9.0, v22.15.0
+     */
+    function resolveTlsa(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: TlsaRecord[]) => void,
+    ): void;
+    namespace resolveTlsa {
+        function __promisify__(hostname: string): Promise<TlsaRecord[]>;
+    }
+    /**
+     * Uses the DNS protocol to resolve text queries (`TXT` records) for the `hostname`. The `records` argument passed to the `callback` function is a
+     * two-dimensional array of the text records available for `hostname` (e.g.`[ ['v=spf1 ip4:0.0.0.0 ', '~all' ] ]`). Each sub-array contains TXT chunks of
+     * one record. Depending on the use case, these could be either joined together or
+     * treated separately.
+     * @since v0.1.27
+     */
+    function resolveTxt(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: string[][]) => void,
+    ): void;
+    namespace resolveTxt {
+        function __promisify__(hostname: string): Promise<string[][]>;
+    }
+    /**
+     * Uses the DNS protocol to resolve all records (also known as `ANY` or `*` query).
+     * The `ret` argument passed to the `callback` function will be an array containing
+     * various types of records. Each object has a property `type` that indicates the
+     * type of the current record. And depending on the `type`, additional properties
+     * will be present on the object:
+     *
+     * <omitted>
+     *
+     * Here is an example of the `ret` object passed to the callback:
+     *
+     * ```js
+     * [ { type: 'A', address: '127.0.0.1', ttl: 299 },
+     *   { type: 'CNAME', value: 'example.com' },
+     *   { type: 'MX', exchange: 'alt4.aspmx.l.example.com', priority: 50 },
+     *   { type: 'NS', value: 'ns1.example.com' },
+     *   { type: 'TXT', entries: [ 'v=spf1 include:_spf.example.com ~all' ] },
+     *   { type: 'SOA',
+     *     nsname: 'ns1.example.com',
+     *     hostmaster: 'admin.example.com',
+     *     serial: 156696742,
+     *     refresh: 900,
+     *     retry: 900,
+     *     expire: 1800,
+     *     minttl: 60 } ]
+     * ```
+     *
+     * DNS server operators may choose not to respond to `ANY` queries. It may be better to call individual methods like {@link resolve4}, {@link resolveMx}, and so on. For more details, see
+     * [RFC 8482](https://tools.ietf.org/html/rfc8482).
+     */
+    function resolveAny(
+        hostname: string,
+        callback: (err: NodeJS.ErrnoException | null, addresses: AnyRecord[]) => void,
+    ): void;
+    namespace resolveAny {
+        function __promisify__(hostname: string): Promise<AnyRecord[]>;
+    }
+    /**
+     * Performs a reverse DNS query that resolves an IPv4 or IPv6 address to an
+     * array of host names.
+     *
+     * On error, `err` is an [`Error`](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-error) object, where `err.code` is
+     * one of the [DNS error codes](https://nodejs.org/docs/latest-v25.x/api/dns.html#error-codes).
+     * @since v0.1.16
+     */
+    function reverse(
+        ip: string,
+        callback: (err: NodeJS.ErrnoException | null, hostnames: string[]) => void,
+    ): void;
+    /**
+     * Get the default value for `order` in {@link lookup} and [`dnsPromises.lookup()`](https://nodejs.org/docs/latest-v25.x/api/dns.html#dnspromiseslookuphostname-options).
+     * The value could be:
+     *
+     * * `ipv4first`: for `order` defaulting to `ipv4first`.
+     * * `ipv6first`: for `order` defaulting to `ipv6first`.
+     * * `verbatim`: for `order` defaulting to `verbatim`.
+     * @since v18.17.0
+     */
+    function getDefaultResultOrder(): "ipv4first" | "ipv6first" | "verbatim";
+    /**
+     * Sets the IP address and port of servers to be used when performing DNS
+     * resolution. The `servers` argument is an array of [RFC 5952](https://tools.ietf.org/html/rfc5952#section-6) formatted
+     * addresses. If the port is the IANA default DNS port (53) it can be omitted.
+     *
+     * ```js
+     * dns.setServers([
+     *   '4.4.4.4',
+     *   '[2001:4860:4860::8888]',
+     *   '4.4.4.4:1053',
+     *   '[2001:4860:4860::8888]:1053',
+     * ]);
+     * ```
+     *
+     * An error will be thrown if an invalid address is provided.
+     *
+     * The `dns.setServers()` method must not be called while a DNS query is in
+     * progress.
+     *
+     * The {@link setServers} method affects only {@link resolve}, `dns.resolve*()` and {@link reverse} (and specifically _not_ {@link lookup}).
+     *
+     * This method works much like [resolve.conf](https://man7.org/linux/man-pages/man5/resolv.conf.5.html).
+     * That is, if attempting to resolve with the first server provided results in a `NOTFOUND` error, the `resolve()` method will _not_ attempt to resolve with
+     * subsequent servers provided. Fallback DNS servers will only be used if the
+     * earlier ones time out or result in some other error.
+     * @since v0.11.3
+     * @param servers array of [RFC 5952](https://datatracker.ietf.org/doc/html/rfc5952#section-6) formatted addresses
+     */
+    function setServers(servers: readonly string[]): void;
+    /**
+     * Returns an array of IP address strings, formatted according to [RFC 5952](https://tools.ietf.org/html/rfc5952#section-6),
+     * that are currently configured for DNS resolution. A string will include a port
+     * section if a custom port is used.
+     *
+     * ```js
+     * [
+     *   '4.4.4.4',
+     *   '2001:4860:4860::8888',
+     *   '4.4.4.4:1053',
+     *   '[2001:4860:4860::8888]:1053',
+     * ]
+     * ```
+     * @since v0.11.3
+     */
+    function getServers(): string[];
+    /**
+     * Set the default value of `order` in {@link lookup} and [`dnsPromises.lookup()`](https://nodejs.org/docs/latest-v25.x/api/dns.html#dnspromiseslookuphostname-options).
+     * The value could be:
+     *
+     * * `ipv4first`: sets default `order` to `ipv4first`.
+     * * `ipv6first`: sets default `order` to `ipv6first`.
+     * * `verbatim`: sets default `order` to `verbatim`.
+     *
+     * The default is `verbatim` and {@link setDefaultResultOrder} have higher
+     * priority than [`--dns-result-order`](https://nodejs.org/docs/latest-v25.x/api/cli.html#--dns-result-orderorder). When using
+     * [worker threads](https://nodejs.org/docs/latest-v25.x/api/worker_threads.html), {@link setDefaultResultOrder} from the main
+     * thread won't affect the default dns orders in workers.
+     * @since v16.4.0, v14.18.0
+     * @param order must be `'ipv4first'`, `'ipv6first'` or `'verbatim'`.
+     */
+    function setDefaultResultOrder(order: "ipv4first" | "ipv6first" | "verbatim"): void;
+    // Error codes
+    const NODATA: "ENODATA";
+    const FORMERR: "EFORMERR";
+    const SERVFAIL: "ESERVFAIL";
+    const NOTFOUND: "ENOTFOUND";
+    const NOTIMP: "ENOTIMP";
+    const REFUSED: "EREFUSED";
+    const BADQUERY: "EBADQUERY";
+    const BADNAME: "EBADNAME";
+    const BADFAMILY: "EBADFAMILY";
+    const BADRESP: "EBADRESP";
+    const CONNREFUSED: "ECONNREFUSED";
+    const TIMEOUT: "ETIMEOUT";
+    const EOF: "EOF";
+    const FILE: "EFILE";
+    const NOMEM: "ENOMEM";
+    const DESTRUCTION: "EDESTRUCTION";
+    const BADSTR: "EBADSTR";
+    const BADFLAGS: "EBADFLAGS";
+    const NONAME: "ENONAME";
+    const BADHINTS: "EBADHINTS";
+    const NOTINITIALIZED: "ENOTINITIALIZED";
+    const LOADIPHLPAPI: "ELOADIPHLPAPI";
+    const ADDRGETNETWORKPARAMS: "EADDRGETNETWORKPARAMS";
+    const CANCELLED: "ECANCELLED";
+    interface ResolverOptions {
+        /**
+         * Query timeout in milliseconds, or `-1` to use the default timeout.
+         */
+        timeout?: number | undefined;
+        /**
+         * The number of tries the resolver will try contacting each name server before giving up.
+         * @default 4
+         */
+        tries?: number | undefined;
+        /**
+         * The max retry timeout, in milliseconds.
+         * @default 0
+         */
+        maxTimeout?: number | undefined;
+    }
+    /**
+     * An independent resolver for DNS requests.
+     *
+     * Creating a new resolver uses the default server settings. Setting
+     * the servers used for a resolver using [`resolver.setServers()`](https://nodejs.org/docs/latest-v25.x/api/dns.html#dnssetserversservers) does not affect
+     * other resolvers:
+     *
+     * ```js
+     * import { Resolver } from 'node:dns';
+     * const resolver = new Resolver();
+     * resolver.setServers(['4.4.4.4']);
+     *
+     * // This request will use the server at 4.4.4.4, independent of global settings.
+     * resolver.resolve4('example.org', (err, addresses) => {
+     *   // ...
+     * });
+     * ```
+     *
+     * The following methods from the `node:dns` module are available:
+     *
+     * * `resolver.getServers()`
+     * * `resolver.resolve()`
+     * * `resolver.resolve4()`
+     * * `resolver.resolve6()`
+     * * `resolver.resolveAny()`
+     * * `resolver.resolveCaa()`
+     * * `resolver.resolveCname()`
+     * * `resolver.resolveMx()`
+     * * `resolver.resolveNaptr()`
+     * * `resolver.resolveNs()`
+     * * `resolver.resolvePtr()`
+     * * `resolver.resolveSoa()`
+     * * `resolver.resolveSrv()`
+     * * `resolver.resolveTxt()`
+     * * `resolver.reverse()`
+     * * `resolver.setServers()`
+     * @since v8.3.0
+     */
+    class Resolver {
+        constructor(options?: ResolverOptions);
+        /**
+         * Cancel all outstanding DNS queries made by this resolver. The corresponding
+         * callbacks will be called with an error with code `ECANCELLED`.
+         * @since v8.3.0
+         */
+        cancel(): void;
+        getServers: typeof getServers;
+        resolve: typeof resolve;
+        resolve4: typeof resolve4;
+        resolve6: typeof resolve6;
+        resolveAny: typeof resolveAny;
+        resolveCaa: typeof resolveCaa;
+        resolveCname: typeof resolveCname;
+        resolveMx: typeof resolveMx;
+        resolveNaptr: typeof resolveNaptr;
+        resolveNs: typeof resolveNs;
+        resolvePtr: typeof resolvePtr;
+        resolveSoa: typeof resolveSoa;
+        resolveSrv: typeof resolveSrv;
+        resolveTlsa: typeof resolveTlsa;
+        resolveTxt: typeof resolveTxt;
+        reverse: typeof reverse;
+        /**
+         * The resolver instance will send its requests from the specified IP address.
+         * This allows programs to specify outbound interfaces when used on multi-homed
+         * systems.
+         *
+         * If a v4 or v6 address is not specified, it is set to the default and the
+         * operating system will choose a local address automatically.
+         *
+         * The resolver will use the v4 local address when making requests to IPv4 DNS
+         * servers, and the v6 local address when making requests to IPv6 DNS servers.
+         * The `rrtype` of resolution requests has no impact on the local address used.
+         * @since v15.1.0, v14.17.0
+         * @param [ipv4='0.0.0.0'] A string representation of an IPv4 address.
+         * @param [ipv6='::0'] A string representation of an IPv6 address.
+         */
+        setLocalAddress(ipv4?: string, ipv6?: string): void;
+        setServers: typeof setServers;
+    }
+}
+declare module "node:dns" {
+    export * as promises from "node:dns/promises";
+}
+declare module "dns" {
+    export * from "node:dns";
+}
diff --git a/mqtt-backend/node_modules/@types/node/dns/promises.d.ts b/mqtt-backend/node_modules/@types/node/dns/promises.d.ts
new file mode 100644
index 0000000..b9e091c
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/dns/promises.d.ts
@@ -0,0 +1,497 @@
+declare module "node:dns/promises" {
+    import {
+        AnyRecord,
+        CaaRecord,
+        LookupAddress,
+        LookupAllOptions,
+        LookupOneOptions,
+        LookupOptions,
+        MxRecord,
+        NaptrRecord,
+        RecordWithTtl,
+        ResolveOptions,
+        ResolverOptions,
+        ResolveWithTtlOptions,
+        SoaRecord,
+        SrvRecord,
+        TlsaRecord,
+    } from "node:dns";
+    /**
+     * Returns an array of IP address strings, formatted according to [RFC 5952](https://tools.ietf.org/html/rfc5952#section-6),
+     * that are currently configured for DNS resolution. A string will include a port
+     * section if a custom port is used.
+     *
+     * ```js
+     * [
+     *   '4.4.4.4',
+     *   '2001:4860:4860::8888',
+     *   '4.4.4.4:1053',
+     *   '[2001:4860:4860::8888]:1053',
+     * ]
+     * ```
+     * @since v10.6.0
+     */
+    function getServers(): string[];
+    /**
+     * Resolves a host name (e.g. `'nodejs.org'`) into the first found A (IPv4) or
+     * AAAA (IPv6) record. All `option` properties are optional. If `options` is an
+     * integer, then it must be `4` or `6` – if `options` is not provided, then IPv4
+     * and IPv6 addresses are both returned if found.
+     *
+     * With the `all` option set to `true`, the `Promise` is resolved with `addresses` being an array of objects with the properties `address` and `family`.
+     *
+     * On error, the `Promise` is rejected with an [`Error`](https://nodejs.org/docs/latest-v20.x/api/errors.html#class-error) object, where `err.code` is the error code.
+     * Keep in mind that `err.code` will be set to `'ENOTFOUND'` not only when
+     * the host name does not exist but also when the lookup fails in other ways
+     * such as no available file descriptors.
+     *
+     * [`dnsPromises.lookup()`](https://nodejs.org/docs/latest-v20.x/api/dns.html#dnspromiseslookuphostname-options) does not necessarily have anything to do with the DNS
+     * protocol. The implementation uses an operating system facility that can
+     * associate names with addresses and vice versa. This implementation can have
+     * subtle but important consequences on the behavior of any Node.js program. Please
+     * take some time to consult the [Implementation considerations section](https://nodejs.org/docs/latest-v20.x/api/dns.html#implementation-considerations) before
+     * using `dnsPromises.lookup()`.
+     *
+     * Example usage:
+     *
+     * ```js
+     * import dns from 'node:dns';
+     * const dnsPromises = dns.promises;
+     * const options = {
+     *   family: 6,
+     *   hints: dns.ADDRCONFIG | dns.V4MAPPED,
+     * };
+     *
+     * dnsPromises.lookup('example.com', options).then((result) => {
+     *   console.log('address: %j family: IPv%s', result.address, result.family);
+     *   // address: "2606:2800:220:1:248:1893:25c8:1946" family: IPv6
+     * });
+     *
+     * // When options.all is true, the result will be an Array.
+     * options.all = true;
+     * dnsPromises.lookup('example.com', options).then((result) => {
+     *   console.log('addresses: %j', result);
+     *   // addresses: [{"address":"2606:2800:220:1:248:1893:25c8:1946","family":6}]
+     * });
+     * ```
+     * @since v10.6.0
+     */
+    function lookup(hostname: string, family: number): Promise<LookupAddress>;
+    function lookup(hostname: string, options: LookupOneOptions): Promise<LookupAddress>;
+    function lookup(hostname: string, options: LookupAllOptions): Promise<LookupAddress[]>;
+    function lookup(hostname: string, options: LookupOptions): Promise<LookupAddress | LookupAddress[]>;
+    function lookup(hostname: string): Promise<LookupAddress>;
+    /**
+     * Resolves the given `address` and `port` into a host name and service using
+     * the operating system's underlying `getnameinfo` implementation.
+     *
+     * If `address` is not a valid IP address, a `TypeError` will be thrown.
+     * The `port` will be coerced to a number. If it is not a legal port, a `TypeError` will be thrown.
+     *
+     * On error, the `Promise` is rejected with an [`Error`](https://nodejs.org/docs/latest-v20.x/api/errors.html#class-error) object, where `err.code` is the error code.
+     *
+     * ```js
+     * import dnsPromises from 'node:dns';
+     * dnsPromises.lookupService('127.0.0.1', 22).then((result) => {
+     *   console.log(result.hostname, result.service);
+     *   // Prints: localhost ssh
+     * });
+     * ```
+     * @since v10.6.0
+     */
+    function lookupService(
+        address: string,
+        port: number,
+    ): Promise<{
+        hostname: string;
+        service: string;
+    }>;
+    /**
+     * Uses the DNS protocol to resolve a host name (e.g. `'nodejs.org'`) into an array
+     * of the resource records. When successful, the `Promise` is resolved with an
+     * array of resource records. The type and structure of individual results vary
+     * based on `rrtype`:
+     *
+     * <omitted>
+     *
+     * On error, the `Promise` is rejected with an [`Error`](https://nodejs.org/docs/latest-v20.x/api/errors.html#class-error) object, where `err.code`
+     * is one of the [DNS error codes](https://nodejs.org/docs/latest-v20.x/api/dns.html#error-codes).
+     * @since v10.6.0
+     * @param hostname Host name to resolve.
+     * @param [rrtype='A'] Resource record type.
+     */
+    function resolve(hostname: string): Promise<string[]>;
+    function resolve(hostname: string, rrtype: "A" | "AAAA" | "CNAME" | "NS" | "PTR"): Promise<string[]>;
+    function resolve(hostname: string, rrtype: "ANY"): Promise<AnyRecord[]>;
+    function resolve(hostname: string, rrtype: "CAA"): Promise<CaaRecord[]>;
+    function resolve(hostname: string, rrtype: "MX"): Promise<MxRecord[]>;
+    function resolve(hostname: string, rrtype: "NAPTR"): Promise<NaptrRecord[]>;
+    function resolve(hostname: string, rrtype: "SOA"): Promise<SoaRecord>;
+    function resolve(hostname: string, rrtype: "SRV"): Promise<SrvRecord[]>;
+    function resolve(hostname: string, rrtype: "TLSA"): Promise<TlsaRecord[]>;
+    function resolve(hostname: string, rrtype: "TXT"): Promise<string[][]>;
+    function resolve(hostname: string, rrtype: string): Promise<
+        | string[]
+        | CaaRecord[]
+        | MxRecord[]
+        | NaptrRecord[]
+        | SoaRecord
+        | SrvRecord[]
+        | TlsaRecord[]
+        | string[][]
+        | AnyRecord[]
+    >;
+    /**
+     * Uses the DNS protocol to resolve IPv4 addresses (`A` records) for the `hostname`. On success, the `Promise` is resolved with an array of IPv4
+     * addresses (e.g. `['74.125.79.104', '74.125.79.105', '74.125.79.106']`).
+     * @since v10.6.0
+     * @param hostname Host name to resolve.
+     */
+    function resolve4(hostname: string): Promise<string[]>;
+    function resolve4(hostname: string, options: ResolveWithTtlOptions): Promise<RecordWithTtl[]>;
+    function resolve4(hostname: string, options: ResolveOptions): Promise<string[] | RecordWithTtl[]>;
+    /**
+     * Uses the DNS protocol to resolve IPv6 addresses (`AAAA` records) for the `hostname`. On success, the `Promise` is resolved with an array of IPv6
+     * addresses.
+     * @since v10.6.0
+     * @param hostname Host name to resolve.
+     */
+    function resolve6(hostname: string): Promise<string[]>;
+    function resolve6(hostname: string, options: ResolveWithTtlOptions): Promise<RecordWithTtl[]>;
+    function resolve6(hostname: string, options: ResolveOptions): Promise<string[] | RecordWithTtl[]>;
+    /**
+     * Uses the DNS protocol to resolve all records (also known as `ANY` or `*` query).
+     * On success, the `Promise` is resolved with an array containing various types of
+     * records. Each object has a property `type` that indicates the type of the
+     * current record. And depending on the `type`, additional properties will be
+     * present on the object:
+     *
+     * <omitted>
+     *
+     * Here is an example of the result object:
+     *
+     * ```js
+     * [ { type: 'A', address: '127.0.0.1', ttl: 299 },
+     *   { type: 'CNAME', value: 'example.com' },
+     *   { type: 'MX', exchange: 'alt4.aspmx.l.example.com', priority: 50 },
+     *   { type: 'NS', value: 'ns1.example.com' },
+     *   { type: 'TXT', entries: [ 'v=spf1 include:_spf.example.com ~all' ] },
+     *   { type: 'SOA',
+     *     nsname: 'ns1.example.com',
+     *     hostmaster: 'admin.example.com',
+     *     serial: 156696742,
+     *     refresh: 900,
+     *     retry: 900,
+     *     expire: 1800,
+     *     minttl: 60 } ]
+     * ```
+     * @since v10.6.0
+     */
+    function resolveAny(hostname: string): Promise<AnyRecord[]>;
+    /**
+     * Uses the DNS protocol to resolve `CAA` records for the `hostname`. On success,
+     * the `Promise` is resolved with an array of objects containing available
+     * certification authority authorization records available for the `hostname` (e.g. `[{critical: 0, iodef: 'mailto:pki@example.com'},{critical: 128, issue: 'pki.example.com'}]`).
+     * @since v15.0.0, v14.17.0
+     */
+    function resolveCaa(hostname: string): Promise<CaaRecord[]>;
+    /**
+     * Uses the DNS protocol to resolve `CNAME` records for the `hostname`. On success,
+     * the `Promise` is resolved with an array of canonical name records available for
+     * the `hostname` (e.g. `['bar.example.com']`).
+     * @since v10.6.0
+     */
+    function resolveCname(hostname: string): Promise<string[]>;
+    /**
+     * Uses the DNS protocol to resolve mail exchange records (`MX` records) for the `hostname`. On success, the `Promise` is resolved with an array of objects
+     * containing both a `priority` and `exchange` property (e.g.`[{priority: 10, exchange: 'mx.example.com'}, ...]`).
+     * @since v10.6.0
+     */
+    function resolveMx(hostname: string): Promise<MxRecord[]>;
+    /**
+     * Uses the DNS protocol to resolve regular expression-based records (`NAPTR` records) for the `hostname`. On success, the `Promise` is resolved with an array
+     * of objects with the following properties:
+     *
+     * * `flags`
+     * * `service`
+     * * `regexp`
+     * * `replacement`
+     * * `order`
+     * * `preference`
+     *
+     * ```js
+     * {
+     *   flags: 's',
+     *   service: 'SIP+D2U',
+     *   regexp: '',
+     *   replacement: '_sip._udp.example.com',
+     *   order: 30,
+     *   preference: 100
+     * }
+     * ```
+     * @since v10.6.0
+     */
+    function resolveNaptr(hostname: string): Promise<NaptrRecord[]>;
+    /**
+     * Uses the DNS protocol to resolve name server records (`NS` records) for the `hostname`. On success, the `Promise` is resolved with an array of name server
+     * records available for `hostname` (e.g.`['ns1.example.com', 'ns2.example.com']`).
+     * @since v10.6.0
+     */
+    function resolveNs(hostname: string): Promise<string[]>;
+    /**
+     * Uses the DNS protocol to resolve pointer records (`PTR` records) for the `hostname`. On success, the `Promise` is resolved with an array of strings
+     * containing the reply records.
+     * @since v10.6.0
+     */
+    function resolvePtr(hostname: string): Promise<string[]>;
+    /**
+     * Uses the DNS protocol to resolve a start of authority record (`SOA` record) for
+     * the `hostname`. On success, the `Promise` is resolved with an object with the
+     * following properties:
+     *
+     * * `nsname`
+     * * `hostmaster`
+     * * `serial`
+     * * `refresh`
+     * * `retry`
+     * * `expire`
+     * * `minttl`
+     *
+     * ```js
+     * {
+     *   nsname: 'ns.example.com',
+     *   hostmaster: 'root.example.com',
+     *   serial: 2013101809,
+     *   refresh: 10000,
+     *   retry: 2400,
+     *   expire: 604800,
+     *   minttl: 3600
+     * }
+     * ```
+     * @since v10.6.0
+     */
+    function resolveSoa(hostname: string): Promise<SoaRecord>;
+    /**
+     * Uses the DNS protocol to resolve service records (`SRV` records) for the `hostname`. On success, the `Promise` is resolved with an array of objects with
+     * the following properties:
+     *
+     * * `priority`
+     * * `weight`
+     * * `port`
+     * * `name`
+     *
+     * ```js
+     * {
+     *   priority: 10,
+     *   weight: 5,
+     *   port: 21223,
+     *   name: 'service.example.com'
+     * }
+     * ```
+     * @since v10.6.0
+     */
+    function resolveSrv(hostname: string): Promise<SrvRecord[]>;
+    /**
+     * Uses the DNS protocol to resolve certificate associations (`TLSA` records) for
+     * the `hostname`. On success, the `Promise` is resolved with an array of objectsAdd commentMore actions
+     * with these properties:
+     *
+     * * `certUsage`
+     * * `selector`
+     * * `match`
+     * * `data`
+     *
+     * ```js
+     * {
+     *   certUsage: 3,
+     *   selector: 1,
+     *   match: 1,
+     *   data: [ArrayBuffer]
+     * }
+     * ```
+     * @since v23.9.0, v22.15.0
+     */
+    function resolveTlsa(hostname: string): Promise<TlsaRecord[]>;
+    /**
+     * Uses the DNS protocol to resolve text queries (`TXT` records) for the `hostname`. On success, the `Promise` is resolved with a two-dimensional array
+     * of the text records available for `hostname` (e.g.`[ ['v=spf1 ip4:0.0.0.0 ', '~all' ] ]`). Each sub-array contains TXT chunks of
+     * one record. Depending on the use case, these could be either joined together or
+     * treated separately.
+     * @since v10.6.0
+     */
+    function resolveTxt(hostname: string): Promise<string[][]>;
+    /**
+     * Performs a reverse DNS query that resolves an IPv4 or IPv6 address to an
+     * array of host names.
+     *
+     * On error, the `Promise` is rejected with an [`Error`](https://nodejs.org/docs/latest-v20.x/api/errors.html#class-error) object, where `err.code`
+     * is one of the [DNS error codes](https://nodejs.org/docs/latest-v20.x/api/dns.html#error-codes).
+     * @since v10.6.0
+     */
+    function reverse(ip: string): Promise<string[]>;
+    /**
+     * Get the default value for `verbatim` in {@link lookup} and [dnsPromises.lookup()](https://nodejs.org/docs/latest-v20.x/api/dns.html#dnspromiseslookuphostname-options).
+     * The value could be:
+     *
+     * * `ipv4first`: for `verbatim` defaulting to `false`.
+     * * `verbatim`: for `verbatim` defaulting to `true`.
+     * @since v20.1.0
+     */
+    function getDefaultResultOrder(): "ipv4first" | "verbatim";
+    /**
+     * Sets the IP address and port of servers to be used when performing DNS
+     * resolution. The `servers` argument is an array of [RFC 5952](https://tools.ietf.org/html/rfc5952#section-6) formatted
+     * addresses. If the port is the IANA default DNS port (53) it can be omitted.
+     *
+     * ```js
+     * dnsPromises.setServers([
+     *   '4.4.4.4',
+     *   '[2001:4860:4860::8888]',
+     *   '4.4.4.4:1053',
+     *   '[2001:4860:4860::8888]:1053',
+     * ]);
+     * ```
+     *
+     * An error will be thrown if an invalid address is provided.
+     *
+     * The `dnsPromises.setServers()` method must not be called while a DNS query is in
+     * progress.
+     *
+     * This method works much like [resolve.conf](https://man7.org/linux/man-pages/man5/resolv.conf.5.html).
+     * That is, if attempting to resolve with the first server provided results in a `NOTFOUND` error, the `resolve()` method will _not_ attempt to resolve with
+     * subsequent servers provided. Fallback DNS servers will only be used if the
+     * earlier ones time out or result in some other error.
+     * @since v10.6.0
+     * @param servers array of `RFC 5952` formatted addresses
+     */
+    function setServers(servers: readonly string[]): void;
+    /**
+     * Set the default value of `order` in `dns.lookup()` and `{@link lookup}`. The value could be:
+     *
+     * * `ipv4first`: sets default `order` to `ipv4first`.
+     * * `ipv6first`: sets default `order` to `ipv6first`.
+     * * `verbatim`: sets default `order` to `verbatim`.
+     *
+     * The default is `verbatim` and [dnsPromises.setDefaultResultOrder()](https://nodejs.org/docs/latest-v20.x/api/dns.html#dnspromisessetdefaultresultorderorder)
+     * have higher priority than [`--dns-result-order`](https://nodejs.org/docs/latest-v20.x/api/cli.html#--dns-result-orderorder).
+     * When using [worker threads](https://nodejs.org/docs/latest-v20.x/api/worker_threads.html), [`dnsPromises.setDefaultResultOrder()`](https://nodejs.org/docs/latest-v20.x/api/dns.html#dnspromisessetdefaultresultorderorder)
+     * from the main thread won't affect the default dns orders in workers.
+     * @since v16.4.0, v14.18.0
+     * @param order must be `'ipv4first'`, `'ipv6first'` or `'verbatim'`.
+     */
+    function setDefaultResultOrder(order: "ipv4first" | "ipv6first" | "verbatim"): void;
+    // Error codes
+    const NODATA: "ENODATA";
+    const FORMERR: "EFORMERR";
+    const SERVFAIL: "ESERVFAIL";
+    const NOTFOUND: "ENOTFOUND";
+    const NOTIMP: "ENOTIMP";
+    const REFUSED: "EREFUSED";
+    const BADQUERY: "EBADQUERY";
+    const BADNAME: "EBADNAME";
+    const BADFAMILY: "EBADFAMILY";
+    const BADRESP: "EBADRESP";
+    const CONNREFUSED: "ECONNREFUSED";
+    const TIMEOUT: "ETIMEOUT";
+    const EOF: "EOF";
+    const FILE: "EFILE";
+    const NOMEM: "ENOMEM";
+    const DESTRUCTION: "EDESTRUCTION";
+    const BADSTR: "EBADSTR";
+    const BADFLAGS: "EBADFLAGS";
+    const NONAME: "ENONAME";
+    const BADHINTS: "EBADHINTS";
+    const NOTINITIALIZED: "ENOTINITIALIZED";
+    const LOADIPHLPAPI: "ELOADIPHLPAPI";
+    const ADDRGETNETWORKPARAMS: "EADDRGETNETWORKPARAMS";
+    const CANCELLED: "ECANCELLED";
+
+    /**
+     * An independent resolver for DNS requests.
+     *
+     * Creating a new resolver uses the default server settings. Setting
+     * the servers used for a resolver using [`resolver.setServers()`](https://nodejs.org/docs/latest-v20.x/api/dns.html#dnspromisessetserversservers) does not affect
+     * other resolvers:
+     *
+     * ```js
+     * import { promises } from 'node:dns';
+     * const resolver = new promises.Resolver();
+     * resolver.setServers(['4.4.4.4']);
+     *
+     * // This request will use the server at 4.4.4.4, independent of global settings.
+     * resolver.resolve4('example.org').then((addresses) => {
+     *   // ...
+     * });
+     *
+     * // Alternatively, the same code can be written using async-await style.
+     * (async function() {
+     *   const addresses = await resolver.resolve4('example.org');
+     * })();
+     * ```
+     *
+     * The following methods from the `dnsPromises` API are available:
+     *
+     * * `resolver.getServers()`
+     * * `resolver.resolve()`
+     * * `resolver.resolve4()`
+     * * `resolver.resolve6()`
+     * * `resolver.resolveAny()`
+     * * `resolver.resolveCaa()`
+     * * `resolver.resolveCname()`
+     * * `resolver.resolveMx()`
+     * * `resolver.resolveNaptr()`
+     * * `resolver.resolveNs()`
+     * * `resolver.resolvePtr()`
+     * * `resolver.resolveSoa()`
+     * * `resolver.resolveSrv()`
+     * * `resolver.resolveTxt()`
+     * * `resolver.reverse()`
+     * * `resolver.setServers()`
+     * @since v10.6.0
+     */
+    class Resolver {
+        constructor(options?: ResolverOptions);
+        /**
+         * Cancel all outstanding DNS queries made by this resolver. The corresponding
+         * callbacks will be called with an error with code `ECANCELLED`.
+         * @since v8.3.0
+         */
+        cancel(): void;
+        getServers: typeof getServers;
+        resolve: typeof resolve;
+        resolve4: typeof resolve4;
+        resolve6: typeof resolve6;
+        resolveAny: typeof resolveAny;
+        resolveCaa: typeof resolveCaa;
+        resolveCname: typeof resolveCname;
+        resolveMx: typeof resolveMx;
+        resolveNaptr: typeof resolveNaptr;
+        resolveNs: typeof resolveNs;
+        resolvePtr: typeof resolvePtr;
+        resolveSoa: typeof resolveSoa;
+        resolveSrv: typeof resolveSrv;
+        resolveTlsa: typeof resolveTlsa;
+        resolveTxt: typeof resolveTxt;
+        reverse: typeof reverse;
+        /**
+         * The resolver instance will send its requests from the specified IP address.
+         * This allows programs to specify outbound interfaces when used on multi-homed
+         * systems.
+         *
+         * If a v4 or v6 address is not specified, it is set to the default and the
+         * operating system will choose a local address automatically.
+         *
+         * The resolver will use the v4 local address when making requests to IPv4 DNS
+         * servers, and the v6 local address when making requests to IPv6 DNS servers.
+         * The `rrtype` of resolution requests has no impact on the local address used.
+         * @since v15.1.0, v14.17.0
+         * @param [ipv4='0.0.0.0'] A string representation of an IPv4 address.
+         * @param [ipv6='::0'] A string representation of an IPv6 address.
+         */
+        setLocalAddress(ipv4?: string, ipv6?: string): void;
+        setServers: typeof setServers;
+    }
+}
+declare module "dns/promises" {
+    export * from "node:dns/promises";
+}
diff --git a/mqtt-backend/node_modules/@types/node/domain.d.ts b/mqtt-backend/node_modules/@types/node/domain.d.ts
new file mode 100644
index 0000000..8e03a7d
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/domain.d.ts
@@ -0,0 +1,150 @@
+declare module "node:domain" {
+    import { EventEmitter } from "node:events";
+    /**
+     * The `Domain` class encapsulates the functionality of routing errors and
+     * uncaught exceptions to the active `Domain` object.
+     *
+     * To handle the errors that it catches, listen to its `'error'` event.
+     */
+    class Domain extends EventEmitter {
+        /**
+         * An array of event emitters that have been explicitly added to the domain.
+         */
+        members: EventEmitter[];
+        /**
+         * The `enter()` method is plumbing used by the `run()`, `bind()`, and `intercept()` methods to set the active domain. It sets `domain.active` and `process.domain` to the domain, and implicitly
+         * pushes the domain onto the domain
+         * stack managed by the domain module (see {@link exit} for details on the
+         * domain stack). The call to `enter()` delimits the beginning of a chain of
+         * asynchronous calls and I/O operations bound to a domain.
+         *
+         * Calling `enter()` changes only the active domain, and does not alter the domain
+         * itself. `enter()` and `exit()` can be called an arbitrary number of times on a
+         * single domain.
+         */
+        enter(): void;
+        /**
+         * The `exit()` method exits the current domain, popping it off the domain stack.
+         * Any time execution is going to switch to the context of a different chain of
+         * asynchronous calls, it's important to ensure that the current domain is exited.
+         * The call to `exit()` delimits either the end of or an interruption to the chain
+         * of asynchronous calls and I/O operations bound to a domain.
+         *
+         * If there are multiple, nested domains bound to the current execution context, `exit()` will exit any domains nested within this domain.
+         *
+         * Calling `exit()` changes only the active domain, and does not alter the domain
+         * itself. `enter()` and `exit()` can be called an arbitrary number of times on a
+         * single domain.
+         */
+        exit(): void;
+        /**
+         * Run the supplied function in the context of the domain, implicitly
+         * binding all event emitters, timers, and low-level requests that are
+         * created in that context. Optionally, arguments can be passed to
+         * the function.
+         *
+         * This is the most basic way to use a domain.
+         *
+         * ```js
+         * import domain from 'node:domain';
+         * import fs from 'node:fs';
+         * const d = domain.create();
+         * d.on('error', (er) => {
+         *   console.error('Caught error!', er);
+         * });
+         * d.run(() => {
+         *   process.nextTick(() => {
+         *     setTimeout(() => { // Simulating some various async stuff
+         *       fs.open('non-existent file', 'r', (er, fd) => {
+         *         if (er) throw er;
+         *         // proceed...
+         *       });
+         *     }, 100);
+         *   });
+         * });
+         * ```
+         *
+         * In this example, the `d.on('error')` handler will be triggered, rather
+         * than crashing the program.
+         */
+        run<T>(fn: (...args: any[]) => T, ...args: any[]): T;
+        /**
+         * Explicitly adds an emitter to the domain. If any event handlers called by
+         * the emitter throw an error, or if the emitter emits an `'error'` event, it
+         * will be routed to the domain's `'error'` event, just like with implicit
+         * binding.
+         *
+         * If the `EventEmitter` was already bound to a domain, it is removed from that
+         * one, and bound to this one instead.
+         * @param emitter emitter to be added to the domain
+         */
+        add(emitter: EventEmitter): void;
+        /**
+         * The opposite of {@link add}. Removes domain handling from the
+         * specified emitter.
+         * @param emitter emitter to be removed from the domain
+         */
+        remove(emitter: EventEmitter): void;
+        /**
+         * The returned function will be a wrapper around the supplied callback
+         * function. When the returned function is called, any errors that are
+         * thrown will be routed to the domain's `'error'` event.
+         *
+         * ```js
+         * const d = domain.create();
+         *
+         * function readSomeFile(filename, cb) {
+         *   fs.readFile(filename, 'utf8', d.bind((er, data) => {
+         *     // If this throws, it will also be passed to the domain.
+         *     return cb(er, data ? JSON.parse(data) : null);
+         *   }));
+         * }
+         *
+         * d.on('error', (er) => {
+         *   // An error occurred somewhere. If we throw it now, it will crash the program
+         *   // with the normal line number and stack message.
+         * });
+         * ```
+         * @param callback The callback function
+         * @return The bound function
+         */
+        bind<T extends Function>(callback: T): T;
+        /**
+         * This method is almost identical to {@link bind}. However, in
+         * addition to catching thrown errors, it will also intercept `Error` objects sent as the first argument to the function.
+         *
+         * In this way, the common `if (err) return callback(err);` pattern can be replaced
+         * with a single error handler in a single place.
+         *
+         * ```js
+         * const d = domain.create();
+         *
+         * function readSomeFile(filename, cb) {
+         *   fs.readFile(filename, 'utf8', d.intercept((data) => {
+         *     // Note, the first argument is never passed to the
+         *     // callback since it is assumed to be the 'Error' argument
+         *     // and thus intercepted by the domain.
+         *
+         *     // If this throws, it will also be passed to the domain
+         *     // so the error-handling logic can be moved to the 'error'
+         *     // event on the domain instead of being repeated throughout
+         *     // the program.
+         *     return cb(null, JSON.parse(data));
+         *   }));
+         * }
+         *
+         * d.on('error', (er) => {
+         *   // An error occurred somewhere. If we throw it now, it will crash the program
+         *   // with the normal line number and stack message.
+         * });
+         * ```
+         * @param callback The callback function
+         * @return The intercepted function
+         */
+        intercept<T extends Function>(callback: T): T;
+    }
+    function create(): Domain;
+}
+declare module "domain" {
+    export * from "node:domain";
+}
diff --git a/mqtt-backend/node_modules/@types/node/events.d.ts b/mqtt-backend/node_modules/@types/node/events.d.ts
new file mode 100644
index 0000000..b4cd8c3
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/events.d.ts
@@ -0,0 +1,1011 @@
+declare module "node:events" {
+    import { AsyncResource, AsyncResourceOptions } from "node:async_hooks";
+    // #region Event map helpers
+    type EventMap<T> = Record<keyof T, any[]>;
+    type IfEventMap<Events extends EventMap<Events>, True, False> = {} extends Events ? False : True;
+    type Args<Events extends EventMap<Events>, EventName extends string | symbol> = IfEventMap<
+        Events,
+        EventName extends keyof Events ? Events[EventName]
+            : EventName extends keyof EventEmitterEventMap ? EventEmitterEventMap[EventName]
+            : any[],
+        any[]
+    >;
+    type EventNames<Events extends EventMap<Events>, EventName extends string | symbol> = IfEventMap<
+        Events,
+        EventName | (keyof Events & (string | symbol)) | keyof EventEmitterEventMap,
+        string | symbol
+    >;
+    type Listener<Events extends EventMap<Events>, EventName extends string | symbol> = IfEventMap<
+        Events,
+        (
+            ...args: EventName extends keyof Events ? Events[EventName]
+                : EventName extends keyof EventEmitterEventMap ? EventEmitterEventMap[EventName]
+                : any[]
+        ) => void,
+        (...args: any[]) => void
+    >;
+    interface EventEmitterEventMap {
+        newListener: [eventName: string | symbol, listener: (...args: any[]) => void];
+        removeListener: [eventName: string | symbol, listener: (...args: any[]) => void];
+    }
+    // #endregion
+    interface EventEmitterOptions {
+        /**
+         * It enables
+         * [automatic capturing of promise rejection](https://nodejs.org/docs/latest-v25.x/api/events.html#capture-rejections-of-promises).
+         * @default false
+         */
+        captureRejections?: boolean | undefined;
+    }
+    /**
+     * The `EventEmitter` class is defined and exposed by the `node:events` module:
+     *
+     * ```js
+     * import { EventEmitter } from 'node:events';
+     * ```
+     *
+     * All `EventEmitter`s emit the event `'newListener'` when new listeners are
+     * added and `'removeListener'` when existing listeners are removed.
+     *
+     * It supports the following option:
+     * @since v0.1.26
+     */
+    class EventEmitter<T extends EventMap<T> = any> {
+        constructor(options?: EventEmitterOptions);
+    }
+    interface EventEmitter<T extends EventMap<T> = any> extends NodeJS.EventEmitter<T> {}
+    global {
+        namespace NodeJS {
+            interface EventEmitter<T extends EventMap<T> = any> {
+                /**
+                 * The `Symbol.for('nodejs.rejection')` method is called in case a
+                 * promise rejection happens when emitting an event and
+                 * `captureRejections` is enabled on the emitter.
+                 * It is possible to use `events.captureRejectionSymbol` in
+                 * place of `Symbol.for('nodejs.rejection')`.
+                 *
+                 * ```js
+                 * import { EventEmitter, captureRejectionSymbol } from 'node:events';
+                 *
+                 * class MyClass extends EventEmitter {
+                 *   constructor() {
+                 *     super({ captureRejections: true });
+                 *   }
+                 *
+                 *   [captureRejectionSymbol](err, event, ...args) {
+                 *     console.log('rejection happened for', event, 'with', err, ...args);
+                 *     this.destroy(err);
+                 *   }
+                 *
+                 *   destroy(err) {
+                 *     // Tear the resource down here.
+                 *   }
+                 * }
+                 * ```
+                 * @since v13.4.0, v12.16.0
+                 */
+                [EventEmitter.captureRejectionSymbol]?(error: Error, event: string | symbol, ...args: any[]): void;
+                /**
+                 * Alias for `emitter.on(eventName, listener)`.
+                 * @since v0.1.26
+                 */
+                addListener<E extends string | symbol>(eventName: EventNames<T, E>, listener: Listener<T, E>): this;
+                /**
+                 * Synchronously calls each of the listeners registered for the event named
+                 * `eventName`, in the order they were registered, passing the supplied arguments
+                 * to each.
+                 *
+                 * Returns `true` if the event had listeners, `false` otherwise.
+                 *
+                 * ```js
+                 * import { EventEmitter } from 'node:events';
+                 * const myEmitter = new EventEmitter();
+                 *
+                 * // First listener
+                 * myEmitter.on('event', function firstListener() {
+                 *   console.log('Helloooo! first listener');
+                 * });
+                 * // Second listener
+                 * myEmitter.on('event', function secondListener(arg1, arg2) {
+                 *   console.log(`event with parameters ${arg1}, ${arg2} in second listener`);
+                 * });
+                 * // Third listener
+                 * myEmitter.on('event', function thirdListener(...args) {
+                 *   const parameters = args.join(', ');
+                 *   console.log(`event with parameters ${parameters} in third listener`);
+                 * });
+                 *
+                 * console.log(myEmitter.listeners('event'));
+                 *
+                 * myEmitter.emit('event', 1, 2, 3, 4, 5);
+                 *
+                 * // Prints:
+                 * // [
+                 * //   [Function: firstListener],
+                 * //   [Function: secondListener],
+                 * //   [Function: thirdListener]
+                 * // ]
+                 * // Helloooo! first listener
+                 * // event with parameters 1, 2 in second listener
+                 * // event with parameters 1, 2, 3, 4, 5 in third listener
+                 * ```
+                 * @since v0.1.26
+                 */
+                emit<E extends string | symbol>(eventName: EventNames<T, E>, ...args: Args<T, E>): boolean;
+                /**
+                 * Returns an array listing the events for which the emitter has registered
+                 * listeners.
+                 *
+                 * ```js
+                 * import { EventEmitter } from 'node:events';
+                 *
+                 * const myEE = new EventEmitter();
+                 * myEE.on('foo', () => {});
+                 * myEE.on('bar', () => {});
+                 *
+                 * const sym = Symbol('symbol');
+                 * myEE.on(sym, () => {});
+                 *
+                 * console.log(myEE.eventNames());
+                 * // Prints: [ 'foo', 'bar', Symbol(symbol) ]
+                 * ```
+                 * @since v6.0.0
+                 */
+                eventNames(): (string | symbol)[];
+                /**
+                 * Returns the current max listener value for the `EventEmitter` which is either
+                 * set by `emitter.setMaxListeners(n)` or defaults to
+                 * `events.defaultMaxListeners`.
+                 * @since v1.0.0
+                 */
+                getMaxListeners(): number;
+                /**
+                 * Returns the number of listeners listening for the event named `eventName`.
+                 * If `listener` is provided, it will return how many times the listener is found
+                 * in the list of the listeners of the event.
+                 * @since v3.2.0
+                 * @param eventName The name of the event being listened for
+                 * @param listener The event handler function
+                 */
+                listenerCount<E extends string | symbol>(
+                    eventName: EventNames<T, E>,
+                    listener?: Listener<T, E>,
+                ): number;
+                /**
+                 * Returns a copy of the array of listeners for the event named `eventName`.
+                 *
+                 * ```js
+                 * server.on('connection', (stream) => {
+                 *   console.log('someone connected!');
+                 * });
+                 * console.log(util.inspect(server.listeners('connection')));
+                 * // Prints: [ [Function] ]
+                 * ```
+                 * @since v0.1.26
+                 */
+                listeners<E extends string | symbol>(eventName: EventNames<T, E>): Listener<T, E>[];
+                /**
+                 * Alias for `emitter.removeListener()`.
+                 * @since v10.0.0
+                 */
+                off<E extends string | symbol>(eventName: EventNames<T, E>, listener: Listener<T, E>): this;
+                /**
+                 * Adds the `listener` function to the end of the listeners array for the
+                 * event named `eventName`. No checks are made to see if the `listener` has
+                 * already been added. Multiple calls passing the same combination of `eventName`
+                 * and `listener` will result in the `listener` being added, and called, multiple
+                 * times.
+                 *
+                 * ```js
+                 * server.on('connection', (stream) => {
+                 *   console.log('someone connected!');
+                 * });
+                 * ```
+                 *
+                 * Returns a reference to the `EventEmitter`, so that calls can be chained.
+                 *
+                 * By default, event listeners are invoked in the order they are added. The
+                 * `emitter.prependListener()` method can be used as an alternative to add the
+                 * event listener to the beginning of the listeners array.
+                 *
+                 * ```js
+                 * import { EventEmitter } from 'node:events';
+                 * const myEE = new EventEmitter();
+                 * myEE.on('foo', () => console.log('a'));
+                 * myEE.prependListener('foo', () => console.log('b'));
+                 * myEE.emit('foo');
+                 * // Prints:
+                 * //   b
+                 * //   a
+                 * ```
+                 * @since v0.1.101
+                 * @param eventName The name of the event.
+                 * @param listener The callback function
+                 */
+                on<E extends string | symbol>(eventName: EventNames<T, E>, listener: Listener<T, E>): this;
+                /**
+                 * Adds a **one-time** `listener` function for the event named `eventName`. The
+                 * next time `eventName` is triggered, this listener is removed and then invoked.
+                 *
+                 * ```js
+                 * server.once('connection', (stream) => {
+                 *   console.log('Ah, we have our first user!');
+                 * });
+                 * ```
+                 *
+                 * Returns a reference to the `EventEmitter`, so that calls can be chained.
+                 *
+                 * By default, event listeners are invoked in the order they are added. The
+                 * `emitter.prependOnceListener()` method can be used as an alternative to add the
+                 * event listener to the beginning of the listeners array.
+                 *
+                 * ```js
+                 * import { EventEmitter } from 'node:events';
+                 * const myEE = new EventEmitter();
+                 * myEE.once('foo', () => console.log('a'));
+                 * myEE.prependOnceListener('foo', () => console.log('b'));
+                 * myEE.emit('foo');
+                 * // Prints:
+                 * //   b
+                 * //   a
+                 * ```
+                 * @since v0.3.0
+                 * @param eventName The name of the event.
+                 * @param listener The callback function
+                 */
+                once<E extends string | symbol>(eventName: EventNames<T, E>, listener: Listener<T, E>): this;
+                /**
+                 * Adds the `listener` function to the _beginning_ of the listeners array for the
+                 * event named `eventName`. No checks are made to see if the `listener` has
+                 * already been added. Multiple calls passing the same combination of `eventName`
+                 * and `listener` will result in the `listener` being added, and called, multiple
+                 * times.
+                 *
+                 * ```js
+                 * server.prependListener('connection', (stream) => {
+                 *   console.log('someone connected!');
+                 * });
+                 * ```
+                 *
+                 * Returns a reference to the `EventEmitter`, so that calls can be chained.
+                 * @since v6.0.0
+                 * @param eventName The name of the event.
+                 * @param listener The callback function
+                 */
+                prependListener<E extends string | symbol>(eventName: EventNames<T, E>, listener: Listener<T, E>): this;
+                /**
+                 * Adds a **one-time** `listener` function for the event named `eventName` to the
+                 * _beginning_ of the listeners array. The next time `eventName` is triggered, this
+                 * listener is removed, and then invoked.
+                 *
+                 * ```js
+                 * server.prependOnceListener('connection', (stream) => {
+                 *   console.log('Ah, we have our first user!');
+                 * });
+                 * ```
+                 *
+                 * Returns a reference to the `EventEmitter`, so that calls can be chained.
+                 * @since v6.0.0
+                 * @param eventName The name of the event.
+                 * @param listener The callback function
+                 */
+                prependOnceListener<E extends string | symbol>(
+                    eventName: EventNames<T, E>,
+                    listener: Listener<T, E>,
+                ): this;
+                /**
+                 * Returns a copy of the array of listeners for the event named `eventName`,
+                 * including any wrappers (such as those created by `.once()`).
+                 *
+                 * ```js
+                 * import { EventEmitter } from 'node:events';
+                 * const emitter = new EventEmitter();
+                 * emitter.once('log', () => console.log('log once'));
+                 *
+                 * // Returns a new Array with a function `onceWrapper` which has a property
+                 * // `listener` which contains the original listener bound above
+                 * const listeners = emitter.rawListeners('log');
+                 * const logFnWrapper = listeners[0];
+                 *
+                 * // Logs "log once" to the console and does not unbind the `once` event
+                 * logFnWrapper.listener();
+                 *
+                 * // Logs "log once" to the console and removes the listener
+                 * logFnWrapper();
+                 *
+                 * emitter.on('log', () => console.log('log persistently'));
+                 * // Will return a new Array with a single function bound by `.on()` above
+                 * const newListeners = emitter.rawListeners('log');
+                 *
+                 * // Logs "log persistently" twice
+                 * newListeners[0]();
+                 * emitter.emit('log');
+                 * ```
+                 * @since v9.4.0
+                 */
+                rawListeners<E extends string | symbol>(eventName: EventNames<T, E>): Listener<T, E>[];
+                /**
+                 * Removes all listeners, or those of the specified `eventName`.
+                 *
+                 * It is bad practice to remove listeners added elsewhere in the code,
+                 * particularly when the `EventEmitter` instance was created by some other
+                 * component or module (e.g. sockets or file streams).
+                 *
+                 * Returns a reference to the `EventEmitter`, so that calls can be chained.
+                 * @since v0.1.26
+                 */
+                // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+                removeAllListeners<E extends string | symbol>(eventName?: EventNames<T, E>): this;
+                /**
+                 * Removes the specified `listener` from the listener array for the event named
+                 * `eventName`.
+                 *
+                 * ```js
+                 * const callback = (stream) => {
+                 *   console.log('someone connected!');
+                 * };
+                 * server.on('connection', callback);
+                 * // ...
+                 * server.removeListener('connection', callback);
+                 * ```
+                 *
+                 * `removeListener()` will remove, at most, one instance of a listener from the
+                 * listener array. If any single listener has been added multiple times to the
+                 * listener array for the specified `eventName`, then `removeListener()` must be
+                 * called multiple times to remove each instance.
+                 *
+                 * Once an event is emitted, all listeners attached to it at the
+                 * time of emitting are called in order. This implies that any
+                 * `removeListener()` or `removeAllListeners()` calls _after_ emitting and
+                 * _before_ the last listener finishes execution will not remove them from
+                 * `emit()` in progress. Subsequent events behave as expected.
+                 *
+                 * ```js
+                 * import { EventEmitter } from 'node:events';
+                 * class MyEmitter extends EventEmitter {}
+                 * const myEmitter = new MyEmitter();
+                 *
+                 * const callbackA = () => {
+                 *   console.log('A');
+                 *   myEmitter.removeListener('event', callbackB);
+                 * };
+                 *
+                 * const callbackB = () => {
+                 *   console.log('B');
+                 * };
+                 *
+                 * myEmitter.on('event', callbackA);
+                 *
+                 * myEmitter.on('event', callbackB);
+                 *
+                 * // callbackA removes listener callbackB but it will still be called.
+                 * // Internal listener array at time of emit [callbackA, callbackB]
+                 * myEmitter.emit('event');
+                 * // Prints:
+                 * //   A
+                 * //   B
+                 *
+                 * // callbackB is now removed.
+                 * // Internal listener array [callbackA]
+                 * myEmitter.emit('event');
+                 * // Prints:
+                 * //   A
+                 * ```
+                 *
+                 * Because listeners are managed using an internal array, calling this will
+                 * change the position indexes of any listener registered _after_ the listener
+                 * being removed. This will not impact the order in which listeners are called,
+                 * but it means that any copies of the listener array as returned by
+                 * the `emitter.listeners()` method will need to be recreated.
+                 *
+                 * When a single function has been added as a handler multiple times for a single
+                 * event (as in the example below), `removeListener()` will remove the most
+                 * recently added instance. In the example the `once('ping')`
+                 * listener is removed:
+                 *
+                 * ```js
+                 * import { EventEmitter } from 'node:events';
+                 * const ee = new EventEmitter();
+                 *
+                 * function pong() {
+                 *   console.log('pong');
+                 * }
+                 *
+                 * ee.on('ping', pong);
+                 * ee.once('ping', pong);
+                 * ee.removeListener('ping', pong);
+                 *
+                 * ee.emit('ping');
+                 * ee.emit('ping');
+                 * ```
+                 *
+                 * Returns a reference to the `EventEmitter`, so that calls can be chained.
+                 * @since v0.1.26
+                 */
+                removeListener<E extends string | symbol>(eventName: EventNames<T, E>, listener: Listener<T, E>): this;
+                /**
+                 * By default `EventEmitter`s will print a warning if more than `10` listeners are
+                 * added for a particular event. This is a useful default that helps finding
+                 * memory leaks. The `emitter.setMaxListeners()` method allows the limit to be
+                 * modified for this specific `EventEmitter` instance. The value can be set to
+                 * `Infinity` (or `0`) to indicate an unlimited number of listeners.
+                 *
+                 * Returns a reference to the `EventEmitter`, so that calls can be chained.
+                 * @since v0.3.5
+                 */
+                setMaxListeners(n: number): this;
+            }
+        }
+    }
+    namespace EventEmitter {
+        export { EventEmitter, EventEmitterEventMap, EventEmitterOptions };
+    }
+    namespace EventEmitter {
+        interface Abortable {
+            signal?: AbortSignal | undefined;
+        }
+        /**
+         * See how to write a custom [rejection handler](https://nodejs.org/docs/latest-v25.x/api/events.html#emittersymbolfornodejsrejectionerr-eventname-args).
+         * @since v13.4.0, v12.16.0
+         */
+        const captureRejectionSymbol: unique symbol;
+        /**
+         * Change the default `captureRejections` option on all new `EventEmitter` objects.
+         * @since v13.4.0, v12.16.0
+         */
+        let captureRejections: boolean;
+        /**
+         * By default, a maximum of `10` listeners can be registered for any single
+         * event. This limit can be changed for individual `EventEmitter` instances
+         * using the `emitter.setMaxListeners(n)` method. To change the default
+         * for _all_ `EventEmitter` instances, the `events.defaultMaxListeners`
+         * property can be used. If this value is not a positive number, a `RangeError`
+         * is thrown.
+         *
+         * Take caution when setting the `events.defaultMaxListeners` because the
+         * change affects _all_ `EventEmitter` instances, including those created before
+         * the change is made. However, calling `emitter.setMaxListeners(n)` still has
+         * precedence over `events.defaultMaxListeners`.
+         *
+         * This is not a hard limit. The `EventEmitter` instance will allow
+         * more listeners to be added but will output a trace warning to stderr indicating
+         * that a "possible EventEmitter memory leak" has been detected. For any single
+         * `EventEmitter`, the `emitter.getMaxListeners()` and `emitter.setMaxListeners()`
+         * methods can be used to temporarily avoid this warning:
+         *
+         * `defaultMaxListeners` has no effect on `AbortSignal` instances. While it is
+         * still possible to use `emitter.setMaxListeners(n)` to set a warning limit
+         * for individual `AbortSignal` instances, per default `AbortSignal` instances will not warn.
+         *
+         * ```js
+         * import { EventEmitter } from 'node:events';
+         * const emitter = new EventEmitter();
+         * emitter.setMaxListeners(emitter.getMaxListeners() + 1);
+         * emitter.once('event', () => {
+         *   // do stuff
+         *   emitter.setMaxListeners(Math.max(emitter.getMaxListeners() - 1, 0));
+         * });
+         * ```
+         *
+         * The `--trace-warnings` command-line flag can be used to display the
+         * stack trace for such warnings.
+         *
+         * The emitted warning can be inspected with `process.on('warning')` and will
+         * have the additional `emitter`, `type`, and `count` properties, referring to
+         * the event emitter instance, the event's name and the number of attached
+         * listeners, respectively.
+         * Its `name` property is set to `'MaxListenersExceededWarning'`.
+         * @since v0.11.2
+         */
+        let defaultMaxListeners: number;
+        /**
+         * This symbol shall be used to install a listener for only monitoring `'error'`
+         * events. Listeners installed using this symbol are called before the regular
+         * `'error'` listeners are called.
+         *
+         * Installing a listener using this symbol does not change the behavior once an
+         * `'error'` event is emitted. Therefore, the process will still crash if no
+         * regular `'error'` listener is installed.
+         * @since v13.6.0, v12.17.0
+         */
+        const errorMonitor: unique symbol;
+        /**
+         * Listens once to the `abort` event on the provided `signal`.
+         *
+         * Listening to the `abort` event on abort signals is unsafe and may
+         * lead to resource leaks since another third party with the signal can
+         * call `e.stopImmediatePropagation()`. Unfortunately Node.js cannot change
+         * this since it would violate the web standard. Additionally, the original
+         * API makes it easy to forget to remove listeners.
+         *
+         * This API allows safely using `AbortSignal`s in Node.js APIs by solving these
+         * two issues by listening to the event such that `stopImmediatePropagation` does
+         * not prevent the listener from running.
+         *
+         * Returns a disposable so that it may be unsubscribed from more easily.
+         *
+         * ```js
+         * import { addAbortListener } from 'node:events';
+         *
+         * function example(signal) {
+         *   let disposable;
+         *   try {
+         *     signal.addEventListener('abort', (e) => e.stopImmediatePropagation());
+         *     disposable = addAbortListener(signal, (e) => {
+         *       // Do something when signal is aborted.
+         *     });
+         *   } finally {
+         *     disposable?.[Symbol.dispose]();
+         *   }
+         * }
+         * ```
+         * @since v20.5.0
+         * @return Disposable that removes the `abort` listener.
+         */
+        function addAbortListener(signal: AbortSignal, resource: (event: Event) => void): Disposable;
+        /**
+         * Returns a copy of the array of listeners for the event named `eventName`.
+         *
+         * For `EventEmitter`s this behaves exactly the same as calling `.listeners` on
+         * the emitter.
+         *
+         * For `EventTarget`s this is the only way to get the event listeners for the
+         * event target. This is useful for debugging and diagnostic purposes.
+         *
+         * ```js
+         * import { getEventListeners, EventEmitter } from 'node:events';
+         *
+         * {
+         *   const ee = new EventEmitter();
+         *   const listener = () => console.log('Events are fun');
+         *   ee.on('foo', listener);
+         *   console.log(getEventListeners(ee, 'foo')); // [ [Function: listener] ]
+         * }
+         * {
+         *   const et = new EventTarget();
+         *   const listener = () => console.log('Events are fun');
+         *   et.addEventListener('foo', listener);
+         *   console.log(getEventListeners(et, 'foo')); // [ [Function: listener] ]
+         * }
+         * ```
+         * @since v15.2.0, v14.17.0
+         */
+        function getEventListeners(emitter: EventEmitter, name: string | symbol): ((...args: any[]) => void)[];
+        function getEventListeners(emitter: EventTarget, name: string): ((...args: any[]) => void)[];
+        /**
+         * Returns the currently set max amount of listeners.
+         *
+         * For `EventEmitter`s this behaves exactly the same as calling `.getMaxListeners` on
+         * the emitter.
+         *
+         * For `EventTarget`s this is the only way to get the max event listeners for the
+         * event target. If the number of event handlers on a single EventTarget exceeds
+         * the max set, the EventTarget will print a warning.
+         *
+         * ```js
+         * import { getMaxListeners, setMaxListeners, EventEmitter } from 'node:events';
+         *
+         * {
+         *   const ee = new EventEmitter();
+         *   console.log(getMaxListeners(ee)); // 10
+         *   setMaxListeners(11, ee);
+         *   console.log(getMaxListeners(ee)); // 11
+         * }
+         * {
+         *   const et = new EventTarget();
+         *   console.log(getMaxListeners(et)); // 10
+         *   setMaxListeners(11, et);
+         *   console.log(getMaxListeners(et)); // 11
+         * }
+         * ```
+         * @since v19.9.0
+         */
+        function getMaxListeners(emitter: EventEmitter | EventTarget): number;
+        /**
+         * Returns the number of registered listeners for the event named `eventName`.
+         *
+         * For `EventEmitter`s this behaves exactly the same as calling `.listenerCount`
+         * on the emitter.
+         *
+         * For `EventTarget`s this is the only way to obtain the listener count. This can
+         * be useful for debugging and diagnostic purposes.
+         * @since v0.9.12
+         */
+        function listenerCount(emitter: EventEmitter, eventName: string | symbol): number;
+        function listenerCount(emitter: EventTarget, eventName: string): number;
+        interface OnOptions extends Abortable {
+            /**
+             * Names of events that will end the iteration.
+             */
+            close?: readonly string[] | undefined;
+            /**
+             * The high watermark. The emitter is paused every time the size of events
+             * being buffered is higher than it. Supported only on emitters implementing
+             * `pause()` and `resume()` methods.
+             * @default Number.MAX_SAFE_INTEGER
+             */
+            highWaterMark?: number | undefined;
+            /**
+             * The low watermark. The emitter is resumed every time the size of events
+             * being buffered is lower than it. Supported only on emitters implementing
+             * `pause()` and `resume()` methods.
+             * @default 1
+             */
+            lowWaterMark?: number | undefined;
+        }
+        /**
+         * ```js
+         * import { on, EventEmitter } from 'node:events';
+         * import process from 'node:process';
+         *
+         * const ee = new EventEmitter();
+         *
+         * // Emit later on
+         * process.nextTick(() => {
+         *   ee.emit('foo', 'bar');
+         *   ee.emit('foo', 42);
+         * });
+         *
+         * for await (const event of on(ee, 'foo')) {
+         *   // The execution of this inner block is synchronous and it
+         *   // processes one event at a time (even with await). Do not use
+         *   // if concurrent execution is required.
+         *   console.log(event); // prints ['bar'] [42]
+         * }
+         * // Unreachable here
+         * ```
+         *
+         * Returns an `AsyncIterator` that iterates `eventName` events. It will throw
+         * if the `EventEmitter` emits `'error'`. It removes all listeners when
+         * exiting the loop. The `value` returned by each iteration is an array
+         * composed of the emitted event arguments.
+         *
+         * An `AbortSignal` can be used to cancel waiting on events:
+         *
+         * ```js
+         * import { on, EventEmitter } from 'node:events';
+         * import process from 'node:process';
+         *
+         * const ac = new AbortController();
+         *
+         * (async () => {
+         *   const ee = new EventEmitter();
+         *
+         *   // Emit later on
+         *   process.nextTick(() => {
+         *     ee.emit('foo', 'bar');
+         *     ee.emit('foo', 42);
+         *   });
+         *
+         *   for await (const event of on(ee, 'foo', { signal: ac.signal })) {
+         *     // The execution of this inner block is synchronous and it
+         *     // processes one event at a time (even with await). Do not use
+         *     // if concurrent execution is required.
+         *     console.log(event); // prints ['bar'] [42]
+         *   }
+         *   // Unreachable here
+         * })();
+         *
+         * process.nextTick(() => ac.abort());
+         * ```
+         * @since v13.6.0, v12.16.0
+         * @returns `AsyncIterator` that iterates `eventName` events emitted by the `emitter`
+         */
+        function on(
+            emitter: EventEmitter,
+            eventName: string | symbol,
+            options?: OnOptions,
+        ): NodeJS.AsyncIterator<any[]>;
+        function on(
+            emitter: EventTarget,
+            eventName: string,
+            options?: OnOptions,
+        ): NodeJS.AsyncIterator<any[]>;
+        interface OnceOptions extends Abortable {}
+        /**
+         * Creates a `Promise` that is fulfilled when the `EventEmitter` emits the given
+         * event or that is rejected if the `EventEmitter` emits `'error'` while waiting.
+         * The `Promise` will resolve with an array of all the arguments emitted to the
+         * given event.
+         *
+         * This method is intentionally generic and works with the web platform
+         * [EventTarget][WHATWG-EventTarget] interface, which has no special
+         * `'error'` event semantics and does not listen to the `'error'` event.
+         *
+         * ```js
+         * import { once, EventEmitter } from 'node:events';
+         * import process from 'node:process';
+         *
+         * const ee = new EventEmitter();
+         *
+         * process.nextTick(() => {
+         *   ee.emit('myevent', 42);
+         * });
+         *
+         * const [value] = await once(ee, 'myevent');
+         * console.log(value);
+         *
+         * const err = new Error('kaboom');
+         * process.nextTick(() => {
+         *   ee.emit('error', err);
+         * });
+         *
+         * try {
+         *   await once(ee, 'myevent');
+         * } catch (err) {
+         *   console.error('error happened', err);
+         * }
+         * ```
+         *
+         * The special handling of the `'error'` event is only used when `events.once()`
+         * is used to wait for another event. If `events.once()` is used to wait for the
+         * '`error'` event itself, then it is treated as any other kind of event without
+         * special handling:
+         *
+         * ```js
+         * import { EventEmitter, once } from 'node:events';
+         *
+         * const ee = new EventEmitter();
+         *
+         * once(ee, 'error')
+         *   .then(([err]) => console.log('ok', err.message))
+         *   .catch((err) => console.error('error', err.message));
+         *
+         * ee.emit('error', new Error('boom'));
+         *
+         * // Prints: ok boom
+         * ```
+         *
+         * An `AbortSignal` can be used to cancel waiting for the event:
+         *
+         * ```js
+         * import { EventEmitter, once } from 'node:events';
+         *
+         * const ee = new EventEmitter();
+         * const ac = new AbortController();
+         *
+         * async function foo(emitter, event, signal) {
+         *   try {
+         *     await once(emitter, event, { signal });
+         *     console.log('event emitted!');
+         *   } catch (error) {
+         *     if (error.name === 'AbortError') {
+         *       console.error('Waiting for the event was canceled!');
+         *     } else {
+         *       console.error('There was an error', error.message);
+         *     }
+         *   }
+         * }
+         *
+         * foo(ee, 'foo', ac.signal);
+         * ac.abort(); // Prints: Waiting for the event was canceled!
+         * ```
+         * @since v11.13.0, v10.16.0
+         */
+        function once(
+            emitter: EventEmitter,
+            eventName: string | symbol,
+            options?: OnceOptions,
+        ): Promise<any[]>;
+        function once(emitter: EventTarget, eventName: string, options?: OnceOptions): Promise<any[]>;
+        /**
+         * ```js
+         * import { setMaxListeners, EventEmitter } from 'node:events';
+         *
+         * const target = new EventTarget();
+         * const emitter = new EventEmitter();
+         *
+         * setMaxListeners(5, target, emitter);
+         * ```
+         * @since v15.4.0
+         * @param n A non-negative number. The maximum number of listeners per `EventTarget` event.
+         * @param eventTargets Zero or more `EventTarget`
+         * or `EventEmitter` instances. If none are specified, `n` is set as the default
+         * max for all newly created `EventTarget` and `EventEmitter` objects.
+         * objects.
+         */
+        function setMaxListeners(n: number, ...eventTargets: ReadonlyArray<EventEmitter | EventTarget>): void;
+        /**
+         * This is the interface from which event-emitting Node.js APIs inherit in the types package.
+         * **It is not intended for consumer use.**
+         *
+         * It provides event-mapped definitions similar to EventEmitter, except that its signatures
+         * are deliberately permissive: they provide type _hinting_, but not rigid type-checking,
+         * for compatibility reasons.
+         *
+         * Classes that inherit directly from EventEmitter in JavaScript can inherit directly from
+         * this interface in the type definitions. Classes that are more than one inheritance level
+         * away from EventEmitter (eg. `net.Socket` > `stream.Duplex` > `EventEmitter`) must instead
+         * copy these method definitions into the derived class. Search "#region InternalEventEmitter"
+         * for examples.
+         * @internal
+         */
+        interface InternalEventEmitter<T extends EventMap<T>> extends EventEmitter {
+            addListener<E extends keyof T>(eventName: E, listener: (...args: T[E]) => void): this;
+            addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            emit<E extends keyof T>(eventName: E, ...args: T[E]): boolean;
+            emit(eventName: string | symbol, ...args: any[]): boolean;
+            listenerCount<E extends keyof T>(eventName: E, listener?: (...args: T[E]) => void): number;
+            listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+            listeners<E extends keyof T>(eventName: E): ((...args: T[E]) => void)[];
+            listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+            off<E extends keyof T>(eventName: E, listener: (...args: T[E]) => void): this;
+            off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            on<E extends keyof T>(eventName: E, listener: (...args: T[E]) => void): this;
+            on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            once<E extends keyof T>(eventName: E, listener: (...args: T[E]) => void): this;
+            once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            prependListener<E extends keyof T>(eventName: E, listener: (...args: T[E]) => void): this;
+            prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            prependOnceListener<E extends keyof T>(eventName: E, listener: (...args: T[E]) => void): this;
+            prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            rawListeners<E extends keyof T>(eventName: E): ((...args: T[E]) => void)[];
+            rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+            // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+            removeAllListeners<E extends keyof T>(eventName?: E): this;
+            removeAllListeners(eventName?: string | symbol): this;
+            removeListener<E extends keyof T>(eventName: E, listener: (...args: T[E]) => void): this;
+            removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        }
+        interface EventEmitterReferencingAsyncResource extends AsyncResource {
+            readonly eventEmitter: EventEmitterAsyncResource;
+        }
+        interface EventEmitterAsyncResourceOptions extends AsyncResourceOptions, EventEmitterOptions {
+            /**
+             * The type of async event.
+             * @default new.target.name
+             */
+            name?: string | undefined;
+        }
+        /**
+         * Integrates `EventEmitter` with `AsyncResource` for `EventEmitter`s that
+         * require manual async tracking. Specifically, all events emitted by instances
+         * of `events.EventEmitterAsyncResource` will run within its [async context](https://nodejs.org/docs/latest-v25.x/api/async_context.html).
+         *
+         * ```js
+         * import { EventEmitterAsyncResource, EventEmitter } from 'node:events';
+         * import { notStrictEqual, strictEqual } from 'node:assert';
+         * import { executionAsyncId, triggerAsyncId } from 'node:async_hooks';
+         *
+         * // Async tracking tooling will identify this as 'Q'.
+         * const ee1 = new EventEmitterAsyncResource({ name: 'Q' });
+         *
+         * // 'foo' listeners will run in the EventEmitters async context.
+         * ee1.on('foo', () => {
+         *   strictEqual(executionAsyncId(), ee1.asyncId);
+         *   strictEqual(triggerAsyncId(), ee1.triggerAsyncId);
+         * });
+         *
+         * const ee2 = new EventEmitter();
+         *
+         * // 'foo' listeners on ordinary EventEmitters that do not track async
+         * // context, however, run in the same async context as the emit().
+         * ee2.on('foo', () => {
+         *   notStrictEqual(executionAsyncId(), ee2.asyncId);
+         *   notStrictEqual(triggerAsyncId(), ee2.triggerAsyncId);
+         * });
+         *
+         * Promise.resolve().then(() => {
+         *   ee1.emit('foo');
+         *   ee2.emit('foo');
+         * });
+         * ```
+         *
+         * The `EventEmitterAsyncResource` class has the same methods and takes the
+         * same options as `EventEmitter` and `AsyncResource` themselves.
+         * @since v17.4.0, v16.14.0
+         */
+        class EventEmitterAsyncResource extends EventEmitter {
+            constructor(options?: EventEmitterAsyncResourceOptions);
+            /**
+             * The unique `asyncId` assigned to the resource.
+             */
+            readonly asyncId: number;
+            /**
+             * The returned `AsyncResource` object has an additional `eventEmitter` property
+             * that provides a reference to this `EventEmitterAsyncResource`.
+             */
+            readonly asyncResource: EventEmitterReferencingAsyncResource;
+            /**
+             * Call all `destroy` hooks. This should only ever be called once. An error will
+             * be thrown if it is called more than once. This **must** be manually called. If
+             * the resource is left to be collected by the GC then the `destroy` hooks will
+             * never be called.
+             */
+            emitDestroy(): void;
+            /**
+             * The same `triggerAsyncId` that is passed to the
+             * `AsyncResource` constructor.
+             */
+            readonly triggerAsyncId: number;
+        }
+        /**
+         * The `NodeEventTarget` is a Node.js-specific extension to `EventTarget`
+         * that emulates a subset of the `EventEmitter` API.
+         * @since v14.5.0
+         */
+        interface NodeEventTarget extends EventTarget {
+            /**
+             * Node.js-specific extension to the `EventTarget` class that emulates the
+             * equivalent `EventEmitter` API. The only difference between `addListener()` and
+             * `addEventListener()` is that `addListener()` will return a reference to the
+             * `EventTarget`.
+             * @since v14.5.0
+             */
+            addListener(type: string, listener: (arg: any) => void): this;
+            /**
+             * Node.js-specific extension to the `EventTarget` class that dispatches the
+             * `arg` to the list of handlers for `type`.
+             * @since v15.2.0
+             * @returns `true` if event listeners registered for the `type` exist,
+             * otherwise `false`.
+             */
+            emit(type: string, arg: any): boolean;
+            /**
+             * Node.js-specific extension to the `EventTarget` class that returns an array
+             * of event `type` names for which event listeners are registered.
+             * @since 14.5.0
+             */
+            eventNames(): string[];
+            /**
+             * Node.js-specific extension to the `EventTarget` class that returns the number
+             * of event listeners registered for the `type`.
+             * @since v14.5.0
+             */
+            listenerCount(type: string): number;
+            /**
+             * Node.js-specific extension to the `EventTarget` class that sets the number
+             * of max event listeners as `n`.
+             * @since v14.5.0
+             */
+            setMaxListeners(n: number): void;
+            /**
+             * Node.js-specific extension to the `EventTarget` class that returns the number
+             * of max event listeners.
+             * @since v14.5.0
+             */
+            getMaxListeners(): number;
+            /**
+             * Node.js-specific alias for `eventTarget.removeEventListener()`.
+             * @since v14.5.0
+             */
+            off(type: string, listener: (arg: any) => void, options?: EventListenerOptions): this;
+            /**
+             * Node.js-specific alias for `eventTarget.addEventListener()`.
+             * @since v14.5.0
+             */
+            on(type: string, listener: (arg: any) => void): this;
+            /**
+             * Node.js-specific extension to the `EventTarget` class that adds a `once`
+             * listener for the given event `type`. This is equivalent to calling `on`
+             * with the `once` option set to `true`.
+             * @since v14.5.0
+             */
+            once(type: string, listener: (arg: any) => void): this;
+            /**
+             * Node.js-specific extension to the `EventTarget` class. If `type` is specified,
+             * removes all registered listeners for `type`, otherwise removes all registered
+             * listeners.
+             * @since v14.5.0
+             */
+            removeAllListeners(type?: string): this;
+            /**
+             * Node.js-specific extension to the `EventTarget` class that removes the
+             * `listener` for the given `type`. The only difference between `removeListener()`
+             * and `removeEventListener()` is that `removeListener()` will return a reference
+             * to the `EventTarget`.
+             * @since v14.5.0
+             */
+            removeListener(type: string, listener: (arg: any) => void, options?: EventListenerOptions): this;
+        }
+        /** @internal */
+        type InternalEventTargetEventProperties<T> = {
+            [K in keyof T & string as `on${K}`]: ((ev: T[K]) => void) | null;
+        };
+    }
+    export = EventEmitter;
+}
+declare module "events" {
+    import events = require("node:events");
+    export = events;
+}
diff --git a/mqtt-backend/node_modules/@types/node/fs.d.ts b/mqtt-backend/node_modules/@types/node/fs.d.ts
new file mode 100644
index 0000000..b74033c
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/fs.d.ts
@@ -0,0 +1,4658 @@
+declare module "node:fs" {
+    import { NonSharedBuffer } from "node:buffer";
+    import { Abortable, EventEmitter, InternalEventEmitter } from "node:events";
+    import { FileHandle } from "node:fs/promises";
+    import * as stream from "node:stream";
+    import { URL } from "node:url";
+    /**
+     * Valid types for path values in "fs".
+     */
+    type PathLike = string | Buffer | URL;
+    type PathOrFileDescriptor = PathLike | number;
+    type TimeLike = string | number | Date;
+    type NoParamCallback = (err: NodeJS.ErrnoException | null) => void;
+    type BufferEncodingOption =
+        | "buffer"
+        | {
+            encoding: "buffer";
+        };
+    interface ObjectEncodingOptions {
+        encoding?: BufferEncoding | null | undefined;
+    }
+    type EncodingOption = ObjectEncodingOptions | BufferEncoding | undefined | null;
+    type OpenMode = number | string;
+    type Mode = number | string;
+    interface StatsBase<T> {
+        isFile(): boolean;
+        isDirectory(): boolean;
+        isBlockDevice(): boolean;
+        isCharacterDevice(): boolean;
+        isSymbolicLink(): boolean;
+        isFIFO(): boolean;
+        isSocket(): boolean;
+        dev: T;
+        ino: T;
+        mode: T;
+        nlink: T;
+        uid: T;
+        gid: T;
+        rdev: T;
+        size: T;
+        blksize: T;
+        blocks: T;
+        atimeMs: T;
+        mtimeMs: T;
+        ctimeMs: T;
+        birthtimeMs: T;
+        atime: Date;
+        mtime: Date;
+        ctime: Date;
+        birthtime: Date;
+    }
+    interface Stats extends StatsBase<number> {}
+    /**
+     * A `fs.Stats` object provides information about a file.
+     *
+     * Objects returned from {@link stat}, {@link lstat}, {@link fstat}, and
+     * their synchronous counterparts are of this type.
+     * If `bigint` in the `options` passed to those methods is true, the numeric values
+     * will be `bigint` instead of `number`, and the object will contain additional
+     * nanosecond-precision properties suffixed with `Ns`. `Stat` objects are not to be created directly using the `new` keyword.
+     *
+     * ```console
+     * Stats {
+     *   dev: 2114,
+     *   ino: 48064969,
+     *   mode: 33188,
+     *   nlink: 1,
+     *   uid: 85,
+     *   gid: 100,
+     *   rdev: 0,
+     *   size: 527,
+     *   blksize: 4096,
+     *   blocks: 8,
+     *   atimeMs: 1318289051000.1,
+     *   mtimeMs: 1318289051000.1,
+     *   ctimeMs: 1318289051000.1,
+     *   birthtimeMs: 1318289051000.1,
+     *   atime: Mon, 10 Oct 2011 23:24:11 GMT,
+     *   mtime: Mon, 10 Oct 2011 23:24:11 GMT,
+     *   ctime: Mon, 10 Oct 2011 23:24:11 GMT,
+     *   birthtime: Mon, 10 Oct 2011 23:24:11 GMT }
+     * ```
+     *
+     * `bigint` version:
+     *
+     * ```console
+     * BigIntStats {
+     *   dev: 2114n,
+     *   ino: 48064969n,
+     *   mode: 33188n,
+     *   nlink: 1n,
+     *   uid: 85n,
+     *   gid: 100n,
+     *   rdev: 0n,
+     *   size: 527n,
+     *   blksize: 4096n,
+     *   blocks: 8n,
+     *   atimeMs: 1318289051000n,
+     *   mtimeMs: 1318289051000n,
+     *   ctimeMs: 1318289051000n,
+     *   birthtimeMs: 1318289051000n,
+     *   atimeNs: 1318289051000000000n,
+     *   mtimeNs: 1318289051000000000n,
+     *   ctimeNs: 1318289051000000000n,
+     *   birthtimeNs: 1318289051000000000n,
+     *   atime: Mon, 10 Oct 2011 23:24:11 GMT,
+     *   mtime: Mon, 10 Oct 2011 23:24:11 GMT,
+     *   ctime: Mon, 10 Oct 2011 23:24:11 GMT,
+     *   birthtime: Mon, 10 Oct 2011 23:24:11 GMT }
+     * ```
+     * @since v0.1.21
+     */
+    class Stats {
+        private constructor();
+    }
+    interface StatsFsBase<T> {
+        /** Type of file system. */
+        type: T;
+        /**  Optimal transfer block size. */
+        bsize: T;
+        /**  Total data blocks in file system. */
+        blocks: T;
+        /** Free blocks in file system. */
+        bfree: T;
+        /** Available blocks for unprivileged users */
+        bavail: T;
+        /** Total file nodes in file system. */
+        files: T;
+        /** Free file nodes in file system. */
+        ffree: T;
+    }
+    interface StatsFs extends StatsFsBase<number> {}
+    /**
+     * Provides information about a mounted file system.
+     *
+     * Objects returned from {@link statfs} and its synchronous counterpart are of
+     * this type. If `bigint` in the `options` passed to those methods is `true`, the
+     * numeric values will be `bigint` instead of `number`.
+     *
+     * ```console
+     * StatFs {
+     *   type: 1397114950,
+     *   bsize: 4096,
+     *   blocks: 121938943,
+     *   bfree: 61058895,
+     *   bavail: 61058895,
+     *   files: 999,
+     *   ffree: 1000000
+     * }
+     * ```
+     *
+     * `bigint` version:
+     *
+     * ```console
+     * StatFs {
+     *   type: 1397114950n,
+     *   bsize: 4096n,
+     *   blocks: 121938943n,
+     *   bfree: 61058895n,
+     *   bavail: 61058895n,
+     *   files: 999n,
+     *   ffree: 1000000n
+     * }
+     * ```
+     * @since v19.6.0, v18.15.0
+     */
+    class StatsFs {}
+    interface BigIntStatsFs extends StatsFsBase<bigint> {}
+    interface StatFsOptions {
+        bigint?: boolean | undefined;
+    }
+    /**
+     * A representation of a directory entry, which can be a file or a subdirectory
+     * within the directory, as returned by reading from an `fs.Dir`. The
+     * directory entry is a combination of the file name and file type pairs.
+     *
+     * Additionally, when {@link readdir} or {@link readdirSync} is called with
+     * the `withFileTypes` option set to `true`, the resulting array is filled with `fs.Dirent` objects, rather than strings or `Buffer` s.
+     * @since v10.10.0
+     */
+    class Dirent<Name extends string | Buffer = string> {
+        /**
+         * Returns `true` if the `fs.Dirent` object describes a regular file.
+         * @since v10.10.0
+         */
+        isFile(): boolean;
+        /**
+         * Returns `true` if the `fs.Dirent` object describes a file system
+         * directory.
+         * @since v10.10.0
+         */
+        isDirectory(): boolean;
+        /**
+         * Returns `true` if the `fs.Dirent` object describes a block device.
+         * @since v10.10.0
+         */
+        isBlockDevice(): boolean;
+        /**
+         * Returns `true` if the `fs.Dirent` object describes a character device.
+         * @since v10.10.0
+         */
+        isCharacterDevice(): boolean;
+        /**
+         * Returns `true` if the `fs.Dirent` object describes a symbolic link.
+         * @since v10.10.0
+         */
+        isSymbolicLink(): boolean;
+        /**
+         * Returns `true` if the `fs.Dirent` object describes a first-in-first-out
+         * (FIFO) pipe.
+         * @since v10.10.0
+         */
+        isFIFO(): boolean;
+        /**
+         * Returns `true` if the `fs.Dirent` object describes a socket.
+         * @since v10.10.0
+         */
+        isSocket(): boolean;
+        /**
+         * The file name that this `fs.Dirent` object refers to. The type of this
+         * value is determined by the `options.encoding` passed to {@link readdir} or {@link readdirSync}.
+         * @since v10.10.0
+         */
+        name: Name;
+        /**
+         * The path to the parent directory of the file this `fs.Dirent` object refers to.
+         * @since v20.12.0, v18.20.0
+         */
+        parentPath: string;
+    }
+    /**
+     * A class representing a directory stream.
+     *
+     * Created by {@link opendir}, {@link opendirSync}, or `fsPromises.opendir()`.
+     *
+     * ```js
+     * import { opendir } from 'node:fs/promises';
+     *
+     * try {
+     *   const dir = await opendir('./');
+     *   for await (const dirent of dir)
+     *     console.log(dirent.name);
+     * } catch (err) {
+     *   console.error(err);
+     * }
+     * ```
+     *
+     * When using the async iterator, the `fs.Dir` object will be automatically
+     * closed after the iterator exits.
+     * @since v12.12.0
+     */
+    class Dir implements AsyncIterable<Dirent> {
+        /**
+         * The read-only path of this directory as was provided to {@link opendir},{@link opendirSync}, or `fsPromises.opendir()`.
+         * @since v12.12.0
+         */
+        readonly path: string;
+        /**
+         * Asynchronously iterates over the directory via `readdir(3)` until all entries have been read.
+         */
+        [Symbol.asyncIterator](): NodeJS.AsyncIterator<Dirent>;
+        /**
+         * Asynchronously close the directory's underlying resource handle.
+         * Subsequent reads will result in errors.
+         *
+         * A promise is returned that will be fulfilled after the resource has been
+         * closed.
+         * @since v12.12.0
+         */
+        close(): Promise<void>;
+        close(cb: NoParamCallback): void;
+        /**
+         * Synchronously close the directory's underlying resource handle.
+         * Subsequent reads will result in errors.
+         * @since v12.12.0
+         */
+        closeSync(): void;
+        /**
+         * Asynchronously read the next directory entry via [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) as an `fs.Dirent`.
+         *
+         * A promise is returned that will be fulfilled with an `fs.Dirent`, or `null` if there are no more directory entries to read.
+         *
+         * Directory entries returned by this function are in no particular order as
+         * provided by the operating system's underlying directory mechanisms.
+         * Entries added or removed while iterating over the directory might not be
+         * included in the iteration results.
+         * @since v12.12.0
+         * @return containing {fs.Dirent|null}
+         */
+        read(): Promise<Dirent | null>;
+        read(cb: (err: NodeJS.ErrnoException | null, dirEnt: Dirent | null) => void): void;
+        /**
+         * Synchronously read the next directory entry as an `fs.Dirent`. See the
+         * POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more detail.
+         *
+         * If there are no more directory entries to read, `null` will be returned.
+         *
+         * Directory entries returned by this function are in no particular order as
+         * provided by the operating system's underlying directory mechanisms.
+         * Entries added or removed while iterating over the directory might not be
+         * included in the iteration results.
+         * @since v12.12.0
+         */
+        readSync(): Dirent | null;
+        /**
+         * Calls `dir.close()` if the directory handle is open, and returns a promise that
+         * fulfills when disposal is complete.
+         * @since v24.1.0
+         */
+        [Symbol.asyncDispose](): Promise<void>;
+        /**
+         * Calls `dir.closeSync()` if the directory handle is open, and returns
+         * `undefined`.
+         * @since v24.1.0
+         */
+        [Symbol.dispose](): void;
+    }
+    /**
+     * Class: fs.StatWatcher
+     * @since v14.3.0, v12.20.0
+     * Extends `EventEmitter`
+     * A successful call to {@link watchFile} method will return a new fs.StatWatcher object.
+     */
+    interface StatWatcher extends EventEmitter {
+        /**
+         * When called, requests that the Node.js event loop _not_ exit so long as the `fs.StatWatcher` is active. Calling `watcher.ref()` multiple times will have
+         * no effect.
+         *
+         * By default, all `fs.StatWatcher` objects are "ref'ed", making it normally
+         * unnecessary to call `watcher.ref()` unless `watcher.unref()` had been
+         * called previously.
+         * @since v14.3.0, v12.20.0
+         */
+        ref(): this;
+        /**
+         * When called, the active `fs.StatWatcher` object will not require the Node.js
+         * event loop to remain active. If there is no other activity keeping the
+         * event loop running, the process may exit before the `fs.StatWatcher` object's
+         * callback is invoked. Calling `watcher.unref()` multiple times will have
+         * no effect.
+         * @since v14.3.0, v12.20.0
+         */
+        unref(): this;
+    }
+    interface FSWatcherEventMap {
+        "change": [eventType: string, filename: string | NonSharedBuffer];
+        "close": [];
+        "error": [error: Error];
+    }
+    interface FSWatcher extends InternalEventEmitter<FSWatcherEventMap> {
+        /**
+         * Stop watching for changes on the given `fs.FSWatcher`. Once stopped, the `fs.FSWatcher` object is no longer usable.
+         * @since v0.5.8
+         */
+        close(): void;
+        /**
+         * When called, requests that the Node.js event loop _not_ exit so long as the `fs.FSWatcher` is active. Calling `watcher.ref()` multiple times will have
+         * no effect.
+         *
+         * By default, all `fs.FSWatcher` objects are "ref'ed", making it normally
+         * unnecessary to call `watcher.ref()` unless `watcher.unref()` had been
+         * called previously.
+         * @since v14.3.0, v12.20.0
+         */
+        ref(): this;
+        /**
+         * When called, the active `fs.FSWatcher` object will not require the Node.js
+         * event loop to remain active. If there is no other activity keeping the
+         * event loop running, the process may exit before the `fs.FSWatcher` object's
+         * callback is invoked. Calling `watcher.unref()` multiple times will have
+         * no effect.
+         * @since v14.3.0, v12.20.0
+         */
+        unref(): this;
+    }
+    interface ReadStreamEventMap extends stream.ReadableEventMap {
+        "close": [];
+        "data": [chunk: string | NonSharedBuffer];
+        "open": [fd: number];
+        "ready": [];
+    }
+    /**
+     * Instances of `fs.ReadStream` are created and returned using the {@link createReadStream} function.
+     * @since v0.1.93
+     */
+    class ReadStream extends stream.Readable {
+        close(callback?: (err?: NodeJS.ErrnoException | null) => void): void;
+        /**
+         * The number of bytes that have been read so far.
+         * @since v6.4.0
+         */
+        bytesRead: number;
+        /**
+         * The path to the file the stream is reading from as specified in the first
+         * argument to `fs.createReadStream()`. If `path` is passed as a string, then`readStream.path` will be a string. If `path` is passed as a `Buffer`, then`readStream.path` will be a
+         * `Buffer`. If `fd` is specified, then`readStream.path` will be `undefined`.
+         * @since v0.1.93
+         */
+        path: string | Buffer;
+        /**
+         * This property is `true` if the underlying file has not been opened yet,
+         * i.e. before the `'ready'` event is emitted.
+         * @since v11.2.0, v10.16.0
+         */
+        pending: boolean;
+        // #region InternalEventEmitter
+        addListener<E extends keyof ReadStreamEventMap>(
+            eventName: E,
+            listener: (...args: ReadStreamEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof ReadStreamEventMap>(eventName: E, ...args: ReadStreamEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof ReadStreamEventMap>(
+            eventName: E,
+            listener?: (...args: ReadStreamEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof ReadStreamEventMap>(eventName: E): ((...args: ReadStreamEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof ReadStreamEventMap>(eventName: E, listener: (...args: ReadStreamEventMap[E]) => void): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof ReadStreamEventMap>(eventName: E, listener: (...args: ReadStreamEventMap[E]) => void): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof ReadStreamEventMap>(
+            eventName: E,
+            listener: (...args: ReadStreamEventMap[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof ReadStreamEventMap>(
+            eventName: E,
+            listener: (...args: ReadStreamEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof ReadStreamEventMap>(
+            eventName: E,
+            listener: (...args: ReadStreamEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof ReadStreamEventMap>(eventName: E): ((...args: ReadStreamEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof ReadStreamEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof ReadStreamEventMap>(
+            eventName: E,
+            listener: (...args: ReadStreamEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface Utf8StreamOptions {
+        /**
+         * Appends writes to dest file instead of truncating it.
+         * @default true
+         */
+        append?: boolean | undefined;
+        /**
+         * Which type of data you can send to the write
+         * function, supported values are `'utf8'` or `'buffer'`.
+         * @default 'utf8'
+         */
+        contentMode?: "utf8" | "buffer" | undefined;
+        /**
+         * A path to a file to be written to (mode controlled by the
+         * append option).
+         */
+        dest?: string | undefined;
+        /**
+         * A file descriptor, something that is returned by `fs.open()`
+         * or `fs.openSync()`.
+         */
+        fd?: number | undefined;
+        /**
+         * An object that has the same API as the `fs` module, useful
+         * for mocking, testing, or customizing the behavior of the stream.
+         */
+        fs?: object | undefined;
+        /**
+         * Perform a `fs.fsyncSync()` every time a write is
+         * completed.
+         */
+        fsync?: boolean | undefined;
+        /**
+         * The maximum length of the internal buffer. If a write
+         * operation would cause the buffer to exceed `maxLength`, the data written is
+         * dropped and a drop event is emitted with the dropped data
+         */
+        maxLength?: number | undefined;
+        /**
+         * The maximum number of bytes that can be written;
+         * @default 16384
+         */
+        maxWrite?: number | undefined;
+        /**
+         * The minimum length of the internal buffer that is
+         * required to be full before flushing.
+         */
+        minLength?: number | undefined;
+        /**
+         * Ensure directory for `dest` file exists when true.
+         * @default false
+         */
+        mkdir?: boolean | undefined;
+        /**
+         * Specify the creating file mode (see `fs.open()`).
+         */
+        mode?: number | string | undefined;
+        /**
+         * Calls flush every `periodicFlush` milliseconds.
+         */
+        periodicFlush?: number | undefined;
+        /**
+         * A function that will be called when `write()`,
+         * `writeSync()`, or `flushSync()` encounters an `EAGAIN` or `EBUSY` error.
+         * If the return value is `true` the operation will be retried, otherwise it
+         * will bubble the error. The `err` is the error that caused this function to
+         * be called, `writeBufferLen` is the length of the buffer that was written,
+         * and `remainingBufferLen` is the length of the remaining buffer that the
+         * stream did not try to write.
+         */
+        retryEAGAIN?: ((err: Error | null, writeBufferLen: number, remainingBufferLen: number) => boolean) | undefined;
+        /**
+         * Perform writes synchronously.
+         */
+        sync?: boolean | undefined;
+    }
+    interface Utf8StreamEventMap {
+        "close": [];
+        "drain": [];
+        "drop": [data: string | Buffer];
+        "error": [error: Error];
+        "finish": [];
+        "ready": [];
+        "write": [n: number];
+    }
+    /**
+     * An optimized UTF-8 stream writer that allows for flushing all the internal
+     * buffering on demand. It handles `EAGAIN` errors correctly, allowing for
+     * customization, for example, by dropping content if the disk is busy.
+     * @since v24.6.0
+     * @experimental
+     */
+    class Utf8Stream implements EventEmitter {
+        constructor(options: Utf8StreamOptions);
+        /**
+         * Whether the stream is appending to the file or truncating it.
+         */
+        readonly append: boolean;
+        /**
+         * The type of data that can be written to the stream. Supported
+         * values are `'utf8'` or `'buffer'`.
+         * @default 'utf8'
+         */
+        readonly contentMode: "utf8" | "buffer";
+        /**
+         * Close the stream immediately, without flushing the internal buffer.
+         */
+        destroy(): void;
+        /**
+         * Close the stream gracefully, flushing the internal buffer before closing.
+         */
+        end(): void;
+        /**
+         * The file descriptor that is being written to.
+         */
+        readonly fd: number;
+        /**
+         * The file that is being written to.
+         */
+        readonly file: string;
+        /**
+         * Writes the current buffer to the file if a write was not in progress. Do
+         * nothing if `minLength` is zero or if it is already writing.
+         */
+        flush(callback: (err: Error | null) => void): void;
+        /**
+         * Flushes the buffered data synchronously. This is a costly operation.
+         */
+        flushSync(): void;
+        /**
+         * Whether the stream is performing a `fs.fsyncSync()` after every
+         * write operation.
+         */
+        readonly fsync: boolean;
+        /**
+         * The maximum length of the internal buffer. If a write
+         * operation would cause the buffer to exceed `maxLength`, the data written is
+         * dropped and a drop event is emitted with the dropped data.
+         */
+        readonly maxLength: number;
+        /**
+         * The minimum length of the internal buffer that is required to be
+         * full before flushing.
+         */
+        readonly minLength: number;
+        /**
+         * Whether the stream should ensure that the directory for the
+         * `dest` file exists. If `true`, it will create the directory if it does not
+         * exist.
+         * @default false
+         */
+        readonly mkdir: boolean;
+        /**
+         * The mode of the file that is being written to.
+         */
+        readonly mode: number | string;
+        /**
+         * The number of milliseconds between flushes. If set to `0`, no
+         * periodic flushes will be performed.
+         */
+        readonly periodicFlush: number;
+        /**
+         * Reopen the file in place, useful for log rotation.
+         * @param file A path to a file to be written to (mode
+         * controlled by the append option).
+         */
+        reopen(file: PathLike): void;
+        /**
+         * Whether the stream is writing synchronously or asynchronously.
+         */
+        readonly sync: boolean;
+        /**
+         * When the `options.contentMode` is set to `'utf8'` when the stream is created,
+         * the `data` argument must be a string. If the `contentMode` is set to `'buffer'`,
+         * the `data` argument must be a `Buffer`.
+         * @param data The data to write.
+         */
+        write(data: string | Buffer): boolean;
+        /**
+         * Whether the stream is currently writing data to the file.
+         */
+        readonly writing: boolean;
+        /**
+         * Calls `utf8Stream.destroy()`.
+         */
+        [Symbol.dispose](): void;
+    }
+    interface Utf8Stream extends InternalEventEmitter<Utf8StreamEventMap> {}
+    interface WriteStreamEventMap extends stream.WritableEventMap {
+        "close": [];
+        "open": [fd: number];
+        "ready": [];
+    }
+    /**
+     * Instances of `fs.WriteStream` are created and returned using the {@link createWriteStream} function.
+     * @since v0.1.93
+     */
+    class WriteStream extends stream.Writable {
+        /**
+         * Closes `writeStream`. Optionally accepts a
+         * callback that will be executed once the `writeStream`is closed.
+         * @since v0.9.4
+         */
+        close(callback?: (err?: NodeJS.ErrnoException | null) => void): void;
+        /**
+         * The number of bytes written so far. Does not include data that is still queued
+         * for writing.
+         * @since v0.4.7
+         */
+        bytesWritten: number;
+        /**
+         * The path to the file the stream is writing to as specified in the first
+         * argument to {@link createWriteStream}. If `path` is passed as a string, then`writeStream.path` will be a string. If `path` is passed as a `Buffer`, then`writeStream.path` will be a
+         * `Buffer`.
+         * @since v0.1.93
+         */
+        path: string | Buffer;
+        /**
+         * This property is `true` if the underlying file has not been opened yet,
+         * i.e. before the `'ready'` event is emitted.
+         * @since v11.2.0
+         */
+        pending: boolean;
+        // #region InternalEventEmitter
+        addListener<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof WriteStreamEventMap>(eventName: E, ...args: WriteStreamEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener?: (...args: WriteStreamEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof WriteStreamEventMap>(eventName: E): ((...args: WriteStreamEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof WriteStreamEventMap>(eventName: E): ((...args: WriteStreamEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof WriteStreamEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    /**
+     * Asynchronously rename file at `oldPath` to the pathname provided
+     * as `newPath`. In the case that `newPath` already exists, it will
+     * be overwritten. If there is a directory at `newPath`, an error will
+     * be raised instead. No arguments other than a possible exception are
+     * given to the completion callback.
+     *
+     * See also: [`rename(2)`](http://man7.org/linux/man-pages/man2/rename.2.html).
+     *
+     * ```js
+     * import { rename } from 'node:fs';
+     *
+     * rename('oldFile.txt', 'newFile.txt', (err) => {
+     *   if (err) throw err;
+     *   console.log('Rename complete!');
+     * });
+     * ```
+     * @since v0.0.2
+     */
+    function rename(oldPath: PathLike, newPath: PathLike, callback: NoParamCallback): void;
+    namespace rename {
+        /**
+         * Asynchronous rename(2) - Change the name or location of a file or directory.
+         * @param oldPath A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * URL support is _experimental_.
+         * @param newPath A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * URL support is _experimental_.
+         */
+        function __promisify__(oldPath: PathLike, newPath: PathLike): Promise<void>;
+    }
+    /**
+     * Renames the file from `oldPath` to `newPath`. Returns `undefined`.
+     *
+     * See the POSIX [`rename(2)`](http://man7.org/linux/man-pages/man2/rename.2.html) documentation for more details.
+     * @since v0.1.21
+     */
+    function renameSync(oldPath: PathLike, newPath: PathLike): void;
+    /**
+     * Truncates the file. No arguments other than a possible exception are
+     * given to the completion callback. A file descriptor can also be passed as the
+     * first argument. In this case, `fs.ftruncate()` is called.
+     *
+     * ```js
+     * import { truncate } from 'node:fs';
+     * // Assuming that 'path/file.txt' is a regular file.
+     * truncate('path/file.txt', (err) => {
+     *   if (err) throw err;
+     *   console.log('path/file.txt was truncated');
+     * });
+     * ```
+     *
+     * Passing a file descriptor is deprecated and may result in an error being thrown
+     * in the future.
+     *
+     * See the POSIX [`truncate(2)`](http://man7.org/linux/man-pages/man2/truncate.2.html) documentation for more details.
+     * @since v0.8.6
+     * @param [len=0]
+     */
+    function truncate(path: PathLike, len: number | undefined, callback: NoParamCallback): void;
+    /**
+     * Asynchronous truncate(2) - Truncate a file to a specified length.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     */
+    function truncate(path: PathLike, callback: NoParamCallback): void;
+    namespace truncate {
+        /**
+         * Asynchronous truncate(2) - Truncate a file to a specified length.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param len If not specified, defaults to `0`.
+         */
+        function __promisify__(path: PathLike, len?: number): Promise<void>;
+    }
+    /**
+     * Truncates the file. Returns `undefined`. A file descriptor can also be
+     * passed as the first argument. In this case, `fs.ftruncateSync()` is called.
+     *
+     * Passing a file descriptor is deprecated and may result in an error being thrown
+     * in the future.
+     * @since v0.8.6
+     * @param [len=0]
+     */
+    function truncateSync(path: PathLike, len?: number): void;
+    /**
+     * Truncates the file descriptor. No arguments other than a possible exception are
+     * given to the completion callback.
+     *
+     * See the POSIX [`ftruncate(2)`](http://man7.org/linux/man-pages/man2/ftruncate.2.html) documentation for more detail.
+     *
+     * If the file referred to by the file descriptor was larger than `len` bytes, only
+     * the first `len` bytes will be retained in the file.
+     *
+     * For example, the following program retains only the first four bytes of the
+     * file:
+     *
+     * ```js
+     * import { open, close, ftruncate } from 'node:fs';
+     *
+     * function closeFd(fd) {
+     *   close(fd, (err) => {
+     *     if (err) throw err;
+     *   });
+     * }
+     *
+     * open('temp.txt', 'r+', (err, fd) => {
+     *   if (err) throw err;
+     *
+     *   try {
+     *     ftruncate(fd, 4, (err) => {
+     *       closeFd(fd);
+     *       if (err) throw err;
+     *     });
+     *   } catch (err) {
+     *     closeFd(fd);
+     *     if (err) throw err;
+     *   }
+     * });
+     * ```
+     *
+     * If the file previously was shorter than `len` bytes, it is extended, and the
+     * extended part is filled with null bytes (`'\0'`):
+     *
+     * If `len` is negative then `0` will be used.
+     * @since v0.8.6
+     * @param [len=0]
+     */
+    function ftruncate(fd: number, len: number | undefined, callback: NoParamCallback): void;
+    /**
+     * Asynchronous ftruncate(2) - Truncate a file to a specified length.
+     * @param fd A file descriptor.
+     */
+    function ftruncate(fd: number, callback: NoParamCallback): void;
+    namespace ftruncate {
+        /**
+         * Asynchronous ftruncate(2) - Truncate a file to a specified length.
+         * @param fd A file descriptor.
+         * @param len If not specified, defaults to `0`.
+         */
+        function __promisify__(fd: number, len?: number): Promise<void>;
+    }
+    /**
+     * Truncates the file descriptor. Returns `undefined`.
+     *
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link ftruncate}.
+     * @since v0.8.6
+     * @param [len=0]
+     */
+    function ftruncateSync(fd: number, len?: number): void;
+    /**
+     * Asynchronously changes owner and group of a file. No arguments other than a
+     * possible exception are given to the completion callback.
+     *
+     * See the POSIX [`chown(2)`](http://man7.org/linux/man-pages/man2/chown.2.html) documentation for more detail.
+     * @since v0.1.97
+     */
+    function chown(path: PathLike, uid: number, gid: number, callback: NoParamCallback): void;
+    namespace chown {
+        /**
+         * Asynchronous chown(2) - Change ownership of a file.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         */
+        function __promisify__(path: PathLike, uid: number, gid: number): Promise<void>;
+    }
+    /**
+     * Synchronously changes owner and group of a file. Returns `undefined`.
+     * This is the synchronous version of {@link chown}.
+     *
+     * See the POSIX [`chown(2)`](http://man7.org/linux/man-pages/man2/chown.2.html) documentation for more detail.
+     * @since v0.1.97
+     */
+    function chownSync(path: PathLike, uid: number, gid: number): void;
+    /**
+     * Sets the owner of the file. No arguments other than a possible exception are
+     * given to the completion callback.
+     *
+     * See the POSIX [`fchown(2)`](http://man7.org/linux/man-pages/man2/fchown.2.html) documentation for more detail.
+     * @since v0.4.7
+     */
+    function fchown(fd: number, uid: number, gid: number, callback: NoParamCallback): void;
+    namespace fchown {
+        /**
+         * Asynchronous fchown(2) - Change ownership of a file.
+         * @param fd A file descriptor.
+         */
+        function __promisify__(fd: number, uid: number, gid: number): Promise<void>;
+    }
+    /**
+     * Sets the owner of the file. Returns `undefined`.
+     *
+     * See the POSIX [`fchown(2)`](http://man7.org/linux/man-pages/man2/fchown.2.html) documentation for more detail.
+     * @since v0.4.7
+     * @param uid The file's new owner's user id.
+     * @param gid The file's new group's group id.
+     */
+    function fchownSync(fd: number, uid: number, gid: number): void;
+    /**
+     * Set the owner of the symbolic link. No arguments other than a possible
+     * exception are given to the completion callback.
+     *
+     * See the POSIX [`lchown(2)`](http://man7.org/linux/man-pages/man2/lchown.2.html) documentation for more detail.
+     */
+    function lchown(path: PathLike, uid: number, gid: number, callback: NoParamCallback): void;
+    namespace lchown {
+        /**
+         * Asynchronous lchown(2) - Change ownership of a file. Does not dereference symbolic links.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         */
+        function __promisify__(path: PathLike, uid: number, gid: number): Promise<void>;
+    }
+    /**
+     * Set the owner for the path. Returns `undefined`.
+     *
+     * See the POSIX [`lchown(2)`](http://man7.org/linux/man-pages/man2/lchown.2.html) documentation for more details.
+     * @param uid The file's new owner's user id.
+     * @param gid The file's new group's group id.
+     */
+    function lchownSync(path: PathLike, uid: number, gid: number): void;
+    /**
+     * Changes the access and modification times of a file in the same way as {@link utimes}, with the difference that if the path refers to a symbolic
+     * link, then the link is not dereferenced: instead, the timestamps of the
+     * symbolic link itself are changed.
+     *
+     * No arguments other than a possible exception are given to the completion
+     * callback.
+     * @since v14.5.0, v12.19.0
+     */
+    function lutimes(path: PathLike, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void;
+    namespace lutimes {
+        /**
+         * Changes the access and modification times of a file in the same way as `fsPromises.utimes()`,
+         * with the difference that if the path refers to a symbolic link, then the link is not
+         * dereferenced: instead, the timestamps of the symbolic link itself are changed.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param atime The last access time. If a string is provided, it will be coerced to number.
+         * @param mtime The last modified time. If a string is provided, it will be coerced to number.
+         */
+        function __promisify__(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>;
+    }
+    /**
+     * Change the file system timestamps of the symbolic link referenced by `path`.
+     * Returns `undefined`, or throws an exception when parameters are incorrect or
+     * the operation fails. This is the synchronous version of {@link lutimes}.
+     * @since v14.5.0, v12.19.0
+     */
+    function lutimesSync(path: PathLike, atime: TimeLike, mtime: TimeLike): void;
+    /**
+     * Asynchronously changes the permissions of a file. No arguments other than a
+     * possible exception are given to the completion callback.
+     *
+     * See the POSIX [`chmod(2)`](http://man7.org/linux/man-pages/man2/chmod.2.html) documentation for more detail.
+     *
+     * ```js
+     * import { chmod } from 'node:fs';
+     *
+     * chmod('my_file.txt', 0o775, (err) => {
+     *   if (err) throw err;
+     *   console.log('The permissions for file "my_file.txt" have been changed!');
+     * });
+     * ```
+     * @since v0.1.30
+     */
+    function chmod(path: PathLike, mode: Mode, callback: NoParamCallback): void;
+    namespace chmod {
+        /**
+         * Asynchronous chmod(2) - Change permissions of a file.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param mode A file mode. If a string is passed, it is parsed as an octal integer.
+         */
+        function __promisify__(path: PathLike, mode: Mode): Promise<void>;
+    }
+    /**
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link chmod}.
+     *
+     * See the POSIX [`chmod(2)`](http://man7.org/linux/man-pages/man2/chmod.2.html) documentation for more detail.
+     * @since v0.6.7
+     */
+    function chmodSync(path: PathLike, mode: Mode): void;
+    /**
+     * Sets the permissions on the file. No arguments other than a possible exception
+     * are given to the completion callback.
+     *
+     * See the POSIX [`fchmod(2)`](http://man7.org/linux/man-pages/man2/fchmod.2.html) documentation for more detail.
+     * @since v0.4.7
+     */
+    function fchmod(fd: number, mode: Mode, callback: NoParamCallback): void;
+    namespace fchmod {
+        /**
+         * Asynchronous fchmod(2) - Change permissions of a file.
+         * @param fd A file descriptor.
+         * @param mode A file mode. If a string is passed, it is parsed as an octal integer.
+         */
+        function __promisify__(fd: number, mode: Mode): Promise<void>;
+    }
+    /**
+     * Sets the permissions on the file. Returns `undefined`.
+     *
+     * See the POSIX [`fchmod(2)`](http://man7.org/linux/man-pages/man2/fchmod.2.html) documentation for more detail.
+     * @since v0.4.7
+     */
+    function fchmodSync(fd: number, mode: Mode): void;
+    /**
+     * Changes the permissions on a symbolic link. No arguments other than a possible
+     * exception are given to the completion callback.
+     *
+     * This method is only implemented on macOS.
+     *
+     * See the POSIX [`lchmod(2)`](https://www.freebsd.org/cgi/man.cgi?query=lchmod&sektion=2) documentation for more detail.
+     * @deprecated Since v0.4.7
+     */
+    function lchmod(path: PathLike, mode: Mode, callback: NoParamCallback): void;
+    /** @deprecated */
+    namespace lchmod {
+        /**
+         * Asynchronous lchmod(2) - Change permissions of a file. Does not dereference symbolic links.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param mode A file mode. If a string is passed, it is parsed as an octal integer.
+         */
+        function __promisify__(path: PathLike, mode: Mode): Promise<void>;
+    }
+    /**
+     * Changes the permissions on a symbolic link. Returns `undefined`.
+     *
+     * This method is only implemented on macOS.
+     *
+     * See the POSIX [`lchmod(2)`](https://www.freebsd.org/cgi/man.cgi?query=lchmod&sektion=2) documentation for more detail.
+     * @deprecated Since v0.4.7
+     */
+    function lchmodSync(path: PathLike, mode: Mode): void;
+    /**
+     * Asynchronous [`stat(2)`](http://man7.org/linux/man-pages/man2/stat.2.html). The callback gets two arguments `(err, stats)` where`stats` is an `fs.Stats` object.
+     *
+     * In case of an error, the `err.code` will be one of `Common System Errors`.
+     *
+     * {@link stat} follows symbolic links. Use {@link lstat} to look at the
+     * links themselves.
+     *
+     * Using `fs.stat()` to check for the existence of a file before calling`fs.open()`, `fs.readFile()`, or `fs.writeFile()` is not recommended.
+     * Instead, user code should open/read/write the file directly and handle the
+     * error raised if the file is not available.
+     *
+     * To check if a file exists without manipulating it afterwards, {@link access} is recommended.
+     *
+     * For example, given the following directory structure:
+     *
+     * ```text
+     * - txtDir
+     * -- file.txt
+     * - app.js
+     * ```
+     *
+     * The next program will check for the stats of the given paths:
+     *
+     * ```js
+     * import { stat } from 'node:fs';
+     *
+     * const pathsToCheck = ['./txtDir', './txtDir/file.txt'];
+     *
+     * for (let i = 0; i < pathsToCheck.length; i++) {
+     *   stat(pathsToCheck[i], (err, stats) => {
+     *     console.log(stats.isDirectory());
+     *     console.log(stats);
+     *   });
+     * }
+     * ```
+     *
+     * The resulting output will resemble:
+     *
+     * ```console
+     * true
+     * Stats {
+     *   dev: 16777220,
+     *   mode: 16877,
+     *   nlink: 3,
+     *   uid: 501,
+     *   gid: 20,
+     *   rdev: 0,
+     *   blksize: 4096,
+     *   ino: 14214262,
+     *   size: 96,
+     *   blocks: 0,
+     *   atimeMs: 1561174653071.963,
+     *   mtimeMs: 1561174614583.3518,
+     *   ctimeMs: 1561174626623.5366,
+     *   birthtimeMs: 1561174126937.2893,
+     *   atime: 2019-06-22T03:37:33.072Z,
+     *   mtime: 2019-06-22T03:36:54.583Z,
+     *   ctime: 2019-06-22T03:37:06.624Z,
+     *   birthtime: 2019-06-22T03:28:46.937Z
+     * }
+     * false
+     * Stats {
+     *   dev: 16777220,
+     *   mode: 33188,
+     *   nlink: 1,
+     *   uid: 501,
+     *   gid: 20,
+     *   rdev: 0,
+     *   blksize: 4096,
+     *   ino: 14214074,
+     *   size: 8,
+     *   blocks: 8,
+     *   atimeMs: 1561174616618.8555,
+     *   mtimeMs: 1561174614584,
+     *   ctimeMs: 1561174614583.8145,
+     *   birthtimeMs: 1561174007710.7478,
+     *   atime: 2019-06-22T03:36:56.619Z,
+     *   mtime: 2019-06-22T03:36:54.584Z,
+     *   ctime: 2019-06-22T03:36:54.584Z,
+     *   birthtime: 2019-06-22T03:26:47.711Z
+     * }
+     * ```
+     * @since v0.0.2
+     */
+    function stat(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
+    function stat(
+        path: PathLike,
+        options:
+            | (StatOptions & {
+                bigint?: false | undefined;
+            })
+            | undefined,
+        callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void,
+    ): void;
+    function stat(
+        path: PathLike,
+        options: StatOptions & {
+            bigint: true;
+        },
+        callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void,
+    ): void;
+    function stat(
+        path: PathLike,
+        options: StatOptions | undefined,
+        callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void,
+    ): void;
+    namespace stat {
+        /**
+         * Asynchronous stat(2) - Get file status.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         */
+        function __promisify__(
+            path: PathLike,
+            options?: StatOptions & {
+                bigint?: false | undefined;
+            },
+        ): Promise<Stats>;
+        function __promisify__(
+            path: PathLike,
+            options: StatOptions & {
+                bigint: true;
+            },
+        ): Promise<BigIntStats>;
+        function __promisify__(path: PathLike, options?: StatOptions): Promise<Stats | BigIntStats>;
+    }
+    interface StatSyncFn extends Function {
+        (path: PathLike, options?: undefined): Stats;
+        (
+            path: PathLike,
+            options?: StatSyncOptions & {
+                bigint?: false | undefined;
+                throwIfNoEntry: false;
+            },
+        ): Stats | undefined;
+        (
+            path: PathLike,
+            options: StatSyncOptions & {
+                bigint: true;
+                throwIfNoEntry: false;
+            },
+        ): BigIntStats | undefined;
+        (
+            path: PathLike,
+            options?: StatSyncOptions & {
+                bigint?: false | undefined;
+            },
+        ): Stats;
+        (
+            path: PathLike,
+            options: StatSyncOptions & {
+                bigint: true;
+            },
+        ): BigIntStats;
+        (
+            path: PathLike,
+            options: StatSyncOptions & {
+                bigint: boolean;
+                throwIfNoEntry?: false | undefined;
+            },
+        ): Stats | BigIntStats;
+        (path: PathLike, options?: StatSyncOptions): Stats | BigIntStats | undefined;
+    }
+    /**
+     * Synchronous stat(2) - Get file status.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     */
+    const statSync: StatSyncFn;
+    /**
+     * Invokes the callback with the `fs.Stats` for the file descriptor.
+     *
+     * See the POSIX [`fstat(2)`](http://man7.org/linux/man-pages/man2/fstat.2.html) documentation for more detail.
+     * @since v0.1.95
+     */
+    function fstat(fd: number, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
+    function fstat(
+        fd: number,
+        options:
+            | (StatOptions & {
+                bigint?: false | undefined;
+            })
+            | undefined,
+        callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void,
+    ): void;
+    function fstat(
+        fd: number,
+        options: StatOptions & {
+            bigint: true;
+        },
+        callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void,
+    ): void;
+    function fstat(
+        fd: number,
+        options: StatOptions | undefined,
+        callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void,
+    ): void;
+    namespace fstat {
+        /**
+         * Asynchronous fstat(2) - Get file status.
+         * @param fd A file descriptor.
+         */
+        function __promisify__(
+            fd: number,
+            options?: StatOptions & {
+                bigint?: false | undefined;
+            },
+        ): Promise<Stats>;
+        function __promisify__(
+            fd: number,
+            options: StatOptions & {
+                bigint: true;
+            },
+        ): Promise<BigIntStats>;
+        function __promisify__(fd: number, options?: StatOptions): Promise<Stats | BigIntStats>;
+    }
+    /**
+     * Retrieves the `fs.Stats` for the file descriptor.
+     *
+     * See the POSIX [`fstat(2)`](http://man7.org/linux/man-pages/man2/fstat.2.html) documentation for more detail.
+     * @since v0.1.95
+     */
+    function fstatSync(
+        fd: number,
+        options?: StatOptions & {
+            bigint?: false | undefined;
+        },
+    ): Stats;
+    function fstatSync(
+        fd: number,
+        options: StatOptions & {
+            bigint: true;
+        },
+    ): BigIntStats;
+    function fstatSync(fd: number, options?: StatOptions): Stats | BigIntStats;
+    /**
+     * Retrieves the `fs.Stats` for the symbolic link referred to by the path.
+     * The callback gets two arguments `(err, stats)` where `stats` is a `fs.Stats` object. `lstat()` is identical to `stat()`, except that if `path` is a symbolic
+     * link, then the link itself is stat-ed, not the file that it refers to.
+     *
+     * See the POSIX [`lstat(2)`](http://man7.org/linux/man-pages/man2/lstat.2.html) documentation for more details.
+     * @since v0.1.30
+     */
+    function lstat(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void): void;
+    function lstat(
+        path: PathLike,
+        options:
+            | (StatOptions & {
+                bigint?: false | undefined;
+            })
+            | undefined,
+        callback: (err: NodeJS.ErrnoException | null, stats: Stats) => void,
+    ): void;
+    function lstat(
+        path: PathLike,
+        options: StatOptions & {
+            bigint: true;
+        },
+        callback: (err: NodeJS.ErrnoException | null, stats: BigIntStats) => void,
+    ): void;
+    function lstat(
+        path: PathLike,
+        options: StatOptions | undefined,
+        callback: (err: NodeJS.ErrnoException | null, stats: Stats | BigIntStats) => void,
+    ): void;
+    namespace lstat {
+        /**
+         * Asynchronous lstat(2) - Get file status. Does not dereference symbolic links.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         */
+        function __promisify__(
+            path: PathLike,
+            options?: StatOptions & {
+                bigint?: false | undefined;
+            },
+        ): Promise<Stats>;
+        function __promisify__(
+            path: PathLike,
+            options: StatOptions & {
+                bigint: true;
+            },
+        ): Promise<BigIntStats>;
+        function __promisify__(path: PathLike, options?: StatOptions): Promise<Stats | BigIntStats>;
+    }
+    /**
+     * Asynchronous [`statfs(2)`](http://man7.org/linux/man-pages/man2/statfs.2.html). Returns information about the mounted file system which
+     * contains `path`. The callback gets two arguments `(err, stats)` where `stats`is an `fs.StatFs` object.
+     *
+     * In case of an error, the `err.code` will be one of `Common System Errors`.
+     * @since v19.6.0, v18.15.0
+     * @param path A path to an existing file or directory on the file system to be queried.
+     */
+    function statfs(path: PathLike, callback: (err: NodeJS.ErrnoException | null, stats: StatsFs) => void): void;
+    function statfs(
+        path: PathLike,
+        options:
+            | (StatFsOptions & {
+                bigint?: false | undefined;
+            })
+            | undefined,
+        callback: (err: NodeJS.ErrnoException | null, stats: StatsFs) => void,
+    ): void;
+    function statfs(
+        path: PathLike,
+        options: StatFsOptions & {
+            bigint: true;
+        },
+        callback: (err: NodeJS.ErrnoException | null, stats: BigIntStatsFs) => void,
+    ): void;
+    function statfs(
+        path: PathLike,
+        options: StatFsOptions | undefined,
+        callback: (err: NodeJS.ErrnoException | null, stats: StatsFs | BigIntStatsFs) => void,
+    ): void;
+    namespace statfs {
+        /**
+         * Asynchronous statfs(2) - Returns information about the mounted file system which contains path. The callback gets two arguments (err, stats) where stats is an <fs.StatFs> object.
+         * @param path A path to an existing file or directory on the file system to be queried.
+         */
+        function __promisify__(
+            path: PathLike,
+            options?: StatFsOptions & {
+                bigint?: false | undefined;
+            },
+        ): Promise<StatsFs>;
+        function __promisify__(
+            path: PathLike,
+            options: StatFsOptions & {
+                bigint: true;
+            },
+        ): Promise<BigIntStatsFs>;
+        function __promisify__(path: PathLike, options?: StatFsOptions): Promise<StatsFs | BigIntStatsFs>;
+    }
+    /**
+     * Synchronous [`statfs(2)`](http://man7.org/linux/man-pages/man2/statfs.2.html). Returns information about the mounted file system which
+     * contains `path`.
+     *
+     * In case of an error, the `err.code` will be one of `Common System Errors`.
+     * @since v19.6.0, v18.15.0
+     * @param path A path to an existing file or directory on the file system to be queried.
+     */
+    function statfsSync(
+        path: PathLike,
+        options?: StatFsOptions & {
+            bigint?: false | undefined;
+        },
+    ): StatsFs;
+    function statfsSync(
+        path: PathLike,
+        options: StatFsOptions & {
+            bigint: true;
+        },
+    ): BigIntStatsFs;
+    function statfsSync(path: PathLike, options?: StatFsOptions): StatsFs | BigIntStatsFs;
+    /**
+     * Synchronous lstat(2) - Get file status. Does not dereference symbolic links.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     */
+    const lstatSync: StatSyncFn;
+    /**
+     * Creates a new link from the `existingPath` to the `newPath`. See the POSIX [`link(2)`](http://man7.org/linux/man-pages/man2/link.2.html) documentation for more detail. No arguments other than
+     * a possible
+     * exception are given to the completion callback.
+     * @since v0.1.31
+     */
+    function link(existingPath: PathLike, newPath: PathLike, callback: NoParamCallback): void;
+    namespace link {
+        /**
+         * Asynchronous link(2) - Create a new link (also known as a hard link) to an existing file.
+         * @param existingPath A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param newPath A path to a file. If a URL is provided, it must use the `file:` protocol.
+         */
+        function __promisify__(existingPath: PathLike, newPath: PathLike): Promise<void>;
+    }
+    /**
+     * Creates a new link from the `existingPath` to the `newPath`. See the POSIX [`link(2)`](http://man7.org/linux/man-pages/man2/link.2.html) documentation for more detail. Returns `undefined`.
+     * @since v0.1.31
+     */
+    function linkSync(existingPath: PathLike, newPath: PathLike): void;
+    /**
+     * Creates the link called `path` pointing to `target`. No arguments other than a
+     * possible exception are given to the completion callback.
+     *
+     * See the POSIX [`symlink(2)`](http://man7.org/linux/man-pages/man2/symlink.2.html) documentation for more details.
+     *
+     * The `type` argument is only available on Windows and ignored on other platforms.
+     * It can be set to `'dir'`, `'file'`, or `'junction'`. If the `type` argument is
+     * not a string, Node.js will autodetect `target` type and use `'file'` or `'dir'`.
+     * If the `target` does not exist, `'file'` will be used. Windows junction points
+     * require the destination path to be absolute. When using `'junction'`, the`target` argument will automatically be normalized to absolute path. Junction
+     * points on NTFS volumes can only point to directories.
+     *
+     * Relative targets are relative to the link's parent directory.
+     *
+     * ```js
+     * import { symlink } from 'node:fs';
+     *
+     * symlink('./mew', './mewtwo', callback);
+     * ```
+     *
+     * The above example creates a symbolic link `mewtwo` which points to `mew` in the
+     * same directory:
+     *
+     * ```bash
+     * $ tree .
+     * .
+     * ├── mew
+     * └── mewtwo -> ./mew
+     * ```
+     * @since v0.1.31
+     * @param [type='null']
+     */
+    function symlink(
+        target: PathLike,
+        path: PathLike,
+        type: symlink.Type | undefined | null,
+        callback: NoParamCallback,
+    ): void;
+    /**
+     * Asynchronous symlink(2) - Create a new symbolic link to an existing file.
+     * @param target A path to an existing file. If a URL is provided, it must use the `file:` protocol.
+     * @param path A path to the new symlink. If a URL is provided, it must use the `file:` protocol.
+     */
+    function symlink(target: PathLike, path: PathLike, callback: NoParamCallback): void;
+    namespace symlink {
+        /**
+         * Asynchronous symlink(2) - Create a new symbolic link to an existing file.
+         * @param target A path to an existing file. If a URL is provided, it must use the `file:` protocol.
+         * @param path A path to the new symlink. If a URL is provided, it must use the `file:` protocol.
+         * @param type May be set to `'dir'`, `'file'`, or `'junction'` (default is `'file'`) and is only available on Windows (ignored on other platforms).
+         * When using `'junction'`, the `target` argument will automatically be normalized to an absolute path.
+         */
+        function __promisify__(target: PathLike, path: PathLike, type?: string | null): Promise<void>;
+        type Type = "dir" | "file" | "junction";
+    }
+    /**
+     * Returns `undefined`.
+     *
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link symlink}.
+     * @since v0.1.31
+     * @param [type='null']
+     */
+    function symlinkSync(target: PathLike, path: PathLike, type?: symlink.Type | null): void;
+    /**
+     * Reads the contents of the symbolic link referred to by `path`. The callback gets
+     * two arguments `(err, linkString)`.
+     *
+     * See the POSIX [`readlink(2)`](http://man7.org/linux/man-pages/man2/readlink.2.html) documentation for more details.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use for
+     * the link path passed to the callback. If the `encoding` is set to `'buffer'`,
+     * the link path returned will be passed as a `Buffer` object.
+     * @since v0.1.31
+     */
+    function readlink(
+        path: PathLike,
+        options: EncodingOption,
+        callback: (err: NodeJS.ErrnoException | null, linkString: string) => void,
+    ): void;
+    /**
+     * Asynchronous readlink(2) - read value of a symbolic link.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readlink(
+        path: PathLike,
+        options: BufferEncodingOption,
+        callback: (err: NodeJS.ErrnoException | null, linkString: NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Asynchronous readlink(2) - read value of a symbolic link.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readlink(
+        path: PathLike,
+        options: EncodingOption,
+        callback: (err: NodeJS.ErrnoException | null, linkString: string | NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Asynchronous readlink(2) - read value of a symbolic link.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     */
+    function readlink(
+        path: PathLike,
+        callback: (err: NodeJS.ErrnoException | null, linkString: string) => void,
+    ): void;
+    namespace readlink {
+        /**
+         * Asynchronous readlink(2) - read value of a symbolic link.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(path: PathLike, options?: EncodingOption): Promise<string>;
+        /**
+         * Asynchronous readlink(2) - read value of a symbolic link.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(path: PathLike, options: BufferEncodingOption): Promise<NonSharedBuffer>;
+        /**
+         * Asynchronous readlink(2) - read value of a symbolic link.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(path: PathLike, options?: EncodingOption): Promise<string | NonSharedBuffer>;
+    }
+    /**
+     * Returns the symbolic link's string value.
+     *
+     * See the POSIX [`readlink(2)`](http://man7.org/linux/man-pages/man2/readlink.2.html) documentation for more details.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use for
+     * the link path returned. If the `encoding` is set to `'buffer'`,
+     * the link path returned will be passed as a `Buffer` object.
+     * @since v0.1.31
+     */
+    function readlinkSync(path: PathLike, options?: EncodingOption): string;
+    /**
+     * Synchronous readlink(2) - read value of a symbolic link.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readlinkSync(path: PathLike, options: BufferEncodingOption): NonSharedBuffer;
+    /**
+     * Synchronous readlink(2) - read value of a symbolic link.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readlinkSync(path: PathLike, options?: EncodingOption): string | NonSharedBuffer;
+    /**
+     * Asynchronously computes the canonical pathname by resolving `.`, `..`, and
+     * symbolic links.
+     *
+     * A canonical pathname is not necessarily unique. Hard links and bind mounts can
+     * expose a file system entity through many pathnames.
+     *
+     * This function behaves like [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html), with some exceptions:
+     *
+     * 1. No case conversion is performed on case-insensitive file systems.
+     * 2. The maximum number of symbolic links is platform-independent and generally
+     * (much) higher than what the native [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html) implementation supports.
+     *
+     * The `callback` gets two arguments `(err, resolvedPath)`. May use `process.cwd` to resolve relative paths.
+     *
+     * Only paths that can be converted to UTF8 strings are supported.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use for
+     * the path passed to the callback. If the `encoding` is set to `'buffer'`,
+     * the path returned will be passed as a `Buffer` object.
+     *
+     * If `path` resolves to a socket or a pipe, the function will return a system
+     * dependent name for that object.
+     * @since v0.1.31
+     */
+    function realpath(
+        path: PathLike,
+        options: EncodingOption,
+        callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void,
+    ): void;
+    /**
+     * Asynchronous realpath(3) - return the canonicalized absolute pathname.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function realpath(
+        path: PathLike,
+        options: BufferEncodingOption,
+        callback: (err: NodeJS.ErrnoException | null, resolvedPath: NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Asynchronous realpath(3) - return the canonicalized absolute pathname.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function realpath(
+        path: PathLike,
+        options: EncodingOption,
+        callback: (err: NodeJS.ErrnoException | null, resolvedPath: string | NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Asynchronous realpath(3) - return the canonicalized absolute pathname.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     */
+    function realpath(
+        path: PathLike,
+        callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void,
+    ): void;
+    namespace realpath {
+        /**
+         * Asynchronous realpath(3) - return the canonicalized absolute pathname.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(path: PathLike, options?: EncodingOption): Promise<string>;
+        /**
+         * Asynchronous realpath(3) - return the canonicalized absolute pathname.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(path: PathLike, options: BufferEncodingOption): Promise<NonSharedBuffer>;
+        /**
+         * Asynchronous realpath(3) - return the canonicalized absolute pathname.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(path: PathLike, options?: EncodingOption): Promise<string | NonSharedBuffer>;
+        /**
+         * Asynchronous [`realpath(3)`](http://man7.org/linux/man-pages/man3/realpath.3.html).
+         *
+         * The `callback` gets two arguments `(err, resolvedPath)`.
+         *
+         * Only paths that can be converted to UTF8 strings are supported.
+         *
+         * The optional `options` argument can be a string specifying an encoding, or an
+         * object with an `encoding` property specifying the character encoding to use for
+         * the path passed to the callback. If the `encoding` is set to `'buffer'`,
+         * the path returned will be passed as a `Buffer` object.
+         *
+         * On Linux, when Node.js is linked against musl libc, the procfs file system must
+         * be mounted on `/proc` in order for this function to work. Glibc does not have
+         * this restriction.
+         * @since v9.2.0
+         */
+        function native(
+            path: PathLike,
+            options: EncodingOption,
+            callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void,
+        ): void;
+        function native(
+            path: PathLike,
+            options: BufferEncodingOption,
+            callback: (err: NodeJS.ErrnoException | null, resolvedPath: NonSharedBuffer) => void,
+        ): void;
+        function native(
+            path: PathLike,
+            options: EncodingOption,
+            callback: (err: NodeJS.ErrnoException | null, resolvedPath: string | NonSharedBuffer) => void,
+        ): void;
+        function native(
+            path: PathLike,
+            callback: (err: NodeJS.ErrnoException | null, resolvedPath: string) => void,
+        ): void;
+    }
+    /**
+     * Returns the resolved pathname.
+     *
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link realpath}.
+     * @since v0.1.31
+     */
+    function realpathSync(path: PathLike, options?: EncodingOption): string;
+    /**
+     * Synchronous realpath(3) - return the canonicalized absolute pathname.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function realpathSync(path: PathLike, options: BufferEncodingOption): NonSharedBuffer;
+    /**
+     * Synchronous realpath(3) - return the canonicalized absolute pathname.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function realpathSync(path: PathLike, options?: EncodingOption): string | NonSharedBuffer;
+    namespace realpathSync {
+        function native(path: PathLike, options?: EncodingOption): string;
+        function native(path: PathLike, options: BufferEncodingOption): NonSharedBuffer;
+        function native(path: PathLike, options?: EncodingOption): string | NonSharedBuffer;
+    }
+    /**
+     * Asynchronously removes a file or symbolic link. No arguments other than a
+     * possible exception are given to the completion callback.
+     *
+     * ```js
+     * import { unlink } from 'node:fs';
+     * // Assuming that 'path/file.txt' is a regular file.
+     * unlink('path/file.txt', (err) => {
+     *   if (err) throw err;
+     *   console.log('path/file.txt was deleted');
+     * });
+     * ```
+     *
+     * `fs.unlink()` will not work on a directory, empty or otherwise. To remove a
+     * directory, use {@link rmdir}.
+     *
+     * See the POSIX [`unlink(2)`](http://man7.org/linux/man-pages/man2/unlink.2.html) documentation for more details.
+     * @since v0.0.2
+     */
+    function unlink(path: PathLike, callback: NoParamCallback): void;
+    namespace unlink {
+        /**
+         * Asynchronous unlink(2) - delete a name and possibly the file it refers to.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         */
+        function __promisify__(path: PathLike): Promise<void>;
+    }
+    /**
+     * Synchronous [`unlink(2)`](http://man7.org/linux/man-pages/man2/unlink.2.html). Returns `undefined`.
+     * @since v0.1.21
+     */
+    function unlinkSync(path: PathLike): void;
+    /** @deprecated `rmdir()` no longer provides any options. This interface will be removed in a future version. */
+    // TODO: remove in future major
+    interface RmDirOptions {}
+    /**
+     * Asynchronous [`rmdir(2)`](http://man7.org/linux/man-pages/man2/rmdir.2.html). No arguments other than a possible exception are given
+     * to the completion callback.
+     *
+     * Using `fs.rmdir()` on a file (not a directory) results in an `ENOENT` error on
+     * Windows and an `ENOTDIR` error on POSIX.
+     *
+     * To get a behavior similar to the `rm -rf` Unix command, use {@link rm} with options `{ recursive: true, force: true }`.
+     * @since v0.0.2
+     */
+    function rmdir(path: PathLike, callback: NoParamCallback): void;
+    namespace rmdir {
+        /**
+         * Asynchronous rmdir(2) - delete a directory.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         */
+        function __promisify__(path: PathLike): Promise<void>;
+    }
+    /**
+     * Synchronous [`rmdir(2)`](http://man7.org/linux/man-pages/man2/rmdir.2.html). Returns `undefined`.
+     *
+     * Using `fs.rmdirSync()` on a file (not a directory) results in an `ENOENT` error
+     * on Windows and an `ENOTDIR` error on POSIX.
+     *
+     * To get a behavior similar to the `rm -rf` Unix command, use {@link rmSync} with options `{ recursive: true, force: true }`.
+     * @since v0.1.21
+     */
+    function rmdirSync(path: PathLike): void;
+    interface RmOptions {
+        /**
+         * When `true`, exceptions will be ignored if `path` does not exist.
+         * @default false
+         */
+        force?: boolean | undefined;
+        /**
+         * If an `EBUSY`, `EMFILE`, `ENFILE`, `ENOTEMPTY`, or
+         * `EPERM` error is encountered, Node.js will retry the operation with a linear
+         * backoff wait of `retryDelay` ms longer on each try. This option represents the
+         * number of retries. This option is ignored if the `recursive` option is not
+         * `true`.
+         * @default 0
+         */
+        maxRetries?: number | undefined;
+        /**
+         * If `true`, perform a recursive directory removal. In
+         * recursive mode, operations are retried on failure.
+         * @default false
+         */
+        recursive?: boolean | undefined;
+        /**
+         * The amount of time in milliseconds to wait between retries.
+         * This option is ignored if the `recursive` option is not `true`.
+         * @default 100
+         */
+        retryDelay?: number | undefined;
+    }
+    /**
+     * Asynchronously removes files and directories (modeled on the standard POSIX `rm` utility). No arguments other than a possible exception are given to the
+     * completion callback.
+     * @since v14.14.0
+     */
+    function rm(path: PathLike, callback: NoParamCallback): void;
+    function rm(path: PathLike, options: RmOptions, callback: NoParamCallback): void;
+    namespace rm {
+        /**
+         * Asynchronously removes files and directories (modeled on the standard POSIX `rm` utility).
+         */
+        function __promisify__(path: PathLike, options?: RmOptions): Promise<void>;
+    }
+    /**
+     * Synchronously removes files and directories (modeled on the standard POSIX `rm` utility). Returns `undefined`.
+     * @since v14.14.0
+     */
+    function rmSync(path: PathLike, options?: RmOptions): void;
+    interface MakeDirectoryOptions {
+        /**
+         * Indicates whether parent folders should be created.
+         * If a folder was created, the path to the first created folder will be returned.
+         * @default false
+         */
+        recursive?: boolean | undefined;
+        /**
+         * A file mode. If a string is passed, it is parsed as an octal integer. If not specified
+         * @default 0o777
+         */
+        mode?: Mode | undefined;
+    }
+    /**
+     * Asynchronously creates a directory.
+     *
+     * The callback is given a possible exception and, if `recursive` is `true`, the
+     * first directory path created, `(err[, path])`.`path` can still be `undefined` when `recursive` is `true`, if no directory was
+     * created (for instance, if it was previously created).
+     *
+     * The optional `options` argument can be an integer specifying `mode` (permission
+     * and sticky bits), or an object with a `mode` property and a `recursive` property indicating whether parent directories should be created. Calling `fs.mkdir()` when `path` is a directory that
+     * exists results in an error only
+     * when `recursive` is false. If `recursive` is false and the directory exists,
+     * an `EEXIST` error occurs.
+     *
+     * ```js
+     * import { mkdir } from 'node:fs';
+     *
+     * // Create ./tmp/a/apple, regardless of whether ./tmp and ./tmp/a exist.
+     * mkdir('./tmp/a/apple', { recursive: true }, (err) => {
+     *   if (err) throw err;
+     * });
+     * ```
+     *
+     * On Windows, using `fs.mkdir()` on the root directory even with recursion will
+     * result in an error:
+     *
+     * ```js
+     * import { mkdir } from 'node:fs';
+     *
+     * mkdir('/', { recursive: true }, (err) => {
+     *   // => [Error: EPERM: operation not permitted, mkdir 'C:\']
+     * });
+     * ```
+     *
+     * See the POSIX [`mkdir(2)`](http://man7.org/linux/man-pages/man2/mkdir.2.html) documentation for more details.
+     * @since v0.1.8
+     */
+    function mkdir(
+        path: PathLike,
+        options: MakeDirectoryOptions & {
+            recursive: true;
+        },
+        callback: (err: NodeJS.ErrnoException | null, path?: string) => void,
+    ): void;
+    /**
+     * Asynchronous mkdir(2) - create a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
+     * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
+     */
+    function mkdir(
+        path: PathLike,
+        options:
+            | Mode
+            | (MakeDirectoryOptions & {
+                recursive?: false | undefined;
+            })
+            | null
+            | undefined,
+        callback: NoParamCallback,
+    ): void;
+    /**
+     * Asynchronous mkdir(2) - create a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
+     * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
+     */
+    function mkdir(
+        path: PathLike,
+        options: Mode | MakeDirectoryOptions | null | undefined,
+        callback: (err: NodeJS.ErrnoException | null, path?: string) => void,
+    ): void;
+    /**
+     * Asynchronous mkdir(2) - create a directory with a mode of `0o777`.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     */
+    function mkdir(path: PathLike, callback: NoParamCallback): void;
+    namespace mkdir {
+        /**
+         * Asynchronous mkdir(2) - create a directory.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
+         * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
+         */
+        function __promisify__(
+            path: PathLike,
+            options: MakeDirectoryOptions & {
+                recursive: true;
+            },
+        ): Promise<string | undefined>;
+        /**
+         * Asynchronous mkdir(2) - create a directory.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
+         * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
+         */
+        function __promisify__(
+            path: PathLike,
+            options?:
+                | Mode
+                | (MakeDirectoryOptions & {
+                    recursive?: false | undefined;
+                })
+                | null,
+        ): Promise<void>;
+        /**
+         * Asynchronous mkdir(2) - create a directory.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
+         * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
+         */
+        function __promisify__(
+            path: PathLike,
+            options?: Mode | MakeDirectoryOptions | null,
+        ): Promise<string | undefined>;
+    }
+    /**
+     * Synchronously creates a directory. Returns `undefined`, or if `recursive` is `true`, the first directory path created.
+     * This is the synchronous version of {@link mkdir}.
+     *
+     * See the POSIX [`mkdir(2)`](http://man7.org/linux/man-pages/man2/mkdir.2.html) documentation for more details.
+     * @since v0.1.21
+     */
+    function mkdirSync(
+        path: PathLike,
+        options: MakeDirectoryOptions & {
+            recursive: true;
+        },
+    ): string | undefined;
+    /**
+     * Synchronous mkdir(2) - create a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
+     * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
+     */
+    function mkdirSync(
+        path: PathLike,
+        options?:
+            | Mode
+            | (MakeDirectoryOptions & {
+                recursive?: false | undefined;
+            })
+            | null,
+    ): void;
+    /**
+     * Synchronous mkdir(2) - create a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
+     * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
+     */
+    function mkdirSync(path: PathLike, options?: Mode | MakeDirectoryOptions | null): string | undefined;
+    /**
+     * Creates a unique temporary directory.
+     *
+     * Generates six random characters to be appended behind a required `prefix` to create a unique temporary directory. Due to platform
+     * inconsistencies, avoid trailing `X` characters in `prefix`. Some platforms,
+     * notably the BSDs, can return more than six random characters, and replace
+     * trailing `X` characters in `prefix` with random characters.
+     *
+     * The created directory path is passed as a string to the callback's second
+     * parameter.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use.
+     *
+     * ```js
+     * import { mkdtemp } from 'node:fs';
+     * import { join } from 'node:path';
+     * import { tmpdir } from 'node:os';
+     *
+     * mkdtemp(join(tmpdir(), 'foo-'), (err, directory) => {
+     *   if (err) throw err;
+     *   console.log(directory);
+     *   // Prints: /tmp/foo-itXde2 or C:\Users\...\AppData\Local\Temp\foo-itXde2
+     * });
+     * ```
+     *
+     * The `fs.mkdtemp()` method will append the six randomly selected characters
+     * directly to the `prefix` string. For instance, given a directory `/tmp`, if the
+     * intention is to create a temporary directory _within_`/tmp`, the `prefix`must end with a trailing platform-specific path separator
+     * (`import { sep } from 'node:path'`).
+     *
+     * ```js
+     * import { tmpdir } from 'node:os';
+     * import { mkdtemp } from 'node:fs';
+     *
+     * // The parent directory for the new temporary directory
+     * const tmpDir = tmpdir();
+     *
+     * // This method is *INCORRECT*:
+     * mkdtemp(tmpDir, (err, directory) => {
+     *   if (err) throw err;
+     *   console.log(directory);
+     *   // Will print something similar to `/tmpabc123`.
+     *   // A new temporary directory is created at the file system root
+     *   // rather than *within* the /tmp directory.
+     * });
+     *
+     * // This method is *CORRECT*:
+     * import { sep } from 'node:path';
+     * mkdtemp(`${tmpDir}${sep}`, (err, directory) => {
+     *   if (err) throw err;
+     *   console.log(directory);
+     *   // Will print something similar to `/tmp/abc123`.
+     *   // A new temporary directory is created within
+     *   // the /tmp directory.
+     * });
+     * ```
+     * @since v5.10.0
+     */
+    function mkdtemp(
+        prefix: string,
+        options: EncodingOption,
+        callback: (err: NodeJS.ErrnoException | null, folder: string) => void,
+    ): void;
+    /**
+     * Asynchronously creates a unique temporary directory.
+     * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function mkdtemp(
+        prefix: string,
+        options: BufferEncodingOption,
+        callback: (err: NodeJS.ErrnoException | null, folder: NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Asynchronously creates a unique temporary directory.
+     * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function mkdtemp(
+        prefix: string,
+        options: EncodingOption,
+        callback: (err: NodeJS.ErrnoException | null, folder: string | NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Asynchronously creates a unique temporary directory.
+     * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
+     */
+    function mkdtemp(
+        prefix: string,
+        callback: (err: NodeJS.ErrnoException | null, folder: string) => void,
+    ): void;
+    namespace mkdtemp {
+        /**
+         * Asynchronously creates a unique temporary directory.
+         * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(prefix: string, options?: EncodingOption): Promise<string>;
+        /**
+         * Asynchronously creates a unique temporary directory.
+         * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(prefix: string, options: BufferEncodingOption): Promise<NonSharedBuffer>;
+        /**
+         * Asynchronously creates a unique temporary directory.
+         * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(prefix: string, options?: EncodingOption): Promise<string | NonSharedBuffer>;
+    }
+    /**
+     * Returns the created directory path.
+     *
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link mkdtemp}.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use.
+     * @since v5.10.0
+     */
+    function mkdtempSync(prefix: string, options?: EncodingOption): string;
+    /**
+     * Synchronously creates a unique temporary directory.
+     * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function mkdtempSync(prefix: string, options: BufferEncodingOption): NonSharedBuffer;
+    /**
+     * Synchronously creates a unique temporary directory.
+     * Generates six random characters to be appended behind a required prefix to create a unique temporary directory.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function mkdtempSync(prefix: string, options?: EncodingOption): string | NonSharedBuffer;
+    interface DisposableTempDir extends Disposable {
+        /**
+         * The path of the created directory.
+         */
+        path: string;
+        /**
+         * A function which removes the created directory.
+         */
+        remove(): void;
+        /**
+         * The same as `remove`.
+         */
+        [Symbol.dispose](): void;
+    }
+    /**
+     * Returns a disposable object whose `path` property holds the created directory
+     * path. When the object is disposed, the directory and its contents will be
+     * removed if it still exists. If the directory cannot be deleted, disposal will
+     * throw an error. The object has a `remove()` method which will perform the same
+     * task.
+     *
+     * <!-- TODO: link MDN docs for disposables once https://github.com/mdn/content/pull/38027 lands -->
+     *
+     * For detailed information, see the documentation of `fs.mkdtemp()`.
+     *
+     * There is no callback-based version of this API because it is designed for use
+     * with the `using` syntax.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use.
+     * @since v24.4.0
+     */
+    function mkdtempDisposableSync(prefix: string, options?: EncodingOption): DisposableTempDir;
+    /**
+     * Reads the contents of a directory. The callback gets two arguments `(err, files)` where `files` is an array of the names of the files in the directory excluding `'.'` and `'..'`.
+     *
+     * See the POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more details.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use for
+     * the filenames passed to the callback. If the `encoding` is set to `'buffer'`,
+     * the filenames returned will be passed as `Buffer` objects.
+     *
+     * If `options.withFileTypes` is set to `true`, the `files` array will contain `fs.Dirent` objects.
+     * @since v0.1.8
+     */
+    function readdir(
+        path: PathLike,
+        options:
+            | {
+                encoding: BufferEncoding | null;
+                withFileTypes?: false | undefined;
+                recursive?: boolean | undefined;
+            }
+            | BufferEncoding
+            | undefined
+            | null,
+        callback: (err: NodeJS.ErrnoException | null, files: string[]) => void,
+    ): void;
+    /**
+     * Asynchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readdir(
+        path: PathLike,
+        options:
+            | {
+                encoding: "buffer";
+                withFileTypes?: false | undefined;
+                recursive?: boolean | undefined;
+            }
+            | "buffer",
+        callback: (err: NodeJS.ErrnoException | null, files: NonSharedBuffer[]) => void,
+    ): void;
+    /**
+     * Asynchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readdir(
+        path: PathLike,
+        options:
+            | (ObjectEncodingOptions & {
+                withFileTypes?: false | undefined;
+                recursive?: boolean | undefined;
+            })
+            | BufferEncoding
+            | undefined
+            | null,
+        callback: (err: NodeJS.ErrnoException | null, files: string[] | NonSharedBuffer[]) => void,
+    ): void;
+    /**
+     * Asynchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     */
+    function readdir(
+        path: PathLike,
+        callback: (err: NodeJS.ErrnoException | null, files: string[]) => void,
+    ): void;
+    /**
+     * Asynchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options If called with `withFileTypes: true` the result data will be an array of Dirent.
+     */
+    function readdir(
+        path: PathLike,
+        options: ObjectEncodingOptions & {
+            withFileTypes: true;
+            recursive?: boolean | undefined;
+        },
+        callback: (err: NodeJS.ErrnoException | null, files: Dirent[]) => void,
+    ): void;
+    /**
+     * Asynchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options Must include `withFileTypes: true` and `encoding: 'buffer'`.
+     */
+    function readdir(
+        path: PathLike,
+        options: {
+            encoding: "buffer";
+            withFileTypes: true;
+            recursive?: boolean | undefined;
+        },
+        callback: (err: NodeJS.ErrnoException | null, files: Dirent<NonSharedBuffer>[]) => void,
+    ): void;
+    namespace readdir {
+        /**
+         * Asynchronous readdir(3) - read a directory.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(
+            path: PathLike,
+            options?:
+                | {
+                    encoding: BufferEncoding | null;
+                    withFileTypes?: false | undefined;
+                    recursive?: boolean | undefined;
+                }
+                | BufferEncoding
+                | null,
+        ): Promise<string[]>;
+        /**
+         * Asynchronous readdir(3) - read a directory.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(
+            path: PathLike,
+            options:
+                | "buffer"
+                | {
+                    encoding: "buffer";
+                    withFileTypes?: false | undefined;
+                    recursive?: boolean | undefined;
+                },
+        ): Promise<NonSharedBuffer[]>;
+        /**
+         * Asynchronous readdir(3) - read a directory.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+         */
+        function __promisify__(
+            path: PathLike,
+            options?:
+                | (ObjectEncodingOptions & {
+                    withFileTypes?: false | undefined;
+                    recursive?: boolean | undefined;
+                })
+                | BufferEncoding
+                | null,
+        ): Promise<string[] | NonSharedBuffer[]>;
+        /**
+         * Asynchronous readdir(3) - read a directory.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options If called with `withFileTypes: true` the result data will be an array of Dirent
+         */
+        function __promisify__(
+            path: PathLike,
+            options: ObjectEncodingOptions & {
+                withFileTypes: true;
+                recursive?: boolean | undefined;
+            },
+        ): Promise<Dirent[]>;
+        /**
+         * Asynchronous readdir(3) - read a directory.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param options Must include `withFileTypes: true` and `encoding: 'buffer'`.
+         */
+        function __promisify__(
+            path: PathLike,
+            options: {
+                encoding: "buffer";
+                withFileTypes: true;
+                recursive?: boolean | undefined;
+            },
+        ): Promise<Dirent<NonSharedBuffer>[]>;
+    }
+    /**
+     * Reads the contents of the directory.
+     *
+     * See the POSIX [`readdir(3)`](http://man7.org/linux/man-pages/man3/readdir.3.html) documentation for more details.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use for
+     * the filenames returned. If the `encoding` is set to `'buffer'`,
+     * the filenames returned will be passed as `Buffer` objects.
+     *
+     * If `options.withFileTypes` is set to `true`, the result will contain `fs.Dirent` objects.
+     * @since v0.1.21
+     */
+    function readdirSync(
+        path: PathLike,
+        options?:
+            | {
+                encoding: BufferEncoding | null;
+                withFileTypes?: false | undefined;
+                recursive?: boolean | undefined;
+            }
+            | BufferEncoding
+            | null,
+    ): string[];
+    /**
+     * Synchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readdirSync(
+        path: PathLike,
+        options:
+            | {
+                encoding: "buffer";
+                withFileTypes?: false | undefined;
+                recursive?: boolean | undefined;
+            }
+            | "buffer",
+    ): NonSharedBuffer[];
+    /**
+     * Synchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readdirSync(
+        path: PathLike,
+        options?:
+            | (ObjectEncodingOptions & {
+                withFileTypes?: false | undefined;
+                recursive?: boolean | undefined;
+            })
+            | BufferEncoding
+            | null,
+    ): string[] | NonSharedBuffer[];
+    /**
+     * Synchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options If called with `withFileTypes: true` the result data will be an array of Dirent.
+     */
+    function readdirSync(
+        path: PathLike,
+        options: ObjectEncodingOptions & {
+            withFileTypes: true;
+            recursive?: boolean | undefined;
+        },
+    ): Dirent[];
+    /**
+     * Synchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options Must include `withFileTypes: true` and `encoding: 'buffer'`.
+     */
+    function readdirSync(
+        path: PathLike,
+        options: {
+            encoding: "buffer";
+            withFileTypes: true;
+            recursive?: boolean | undefined;
+        },
+    ): Dirent<NonSharedBuffer>[];
+    /**
+     * Closes the file descriptor. No arguments other than a possible exception are
+     * given to the completion callback.
+     *
+     * Calling `fs.close()` on any file descriptor (`fd`) that is currently in use
+     * through any other `fs` operation may lead to undefined behavior.
+     *
+     * See the POSIX [`close(2)`](http://man7.org/linux/man-pages/man2/close.2.html) documentation for more detail.
+     * @since v0.0.2
+     */
+    function close(fd: number, callback?: NoParamCallback): void;
+    namespace close {
+        /**
+         * Asynchronous close(2) - close a file descriptor.
+         * @param fd A file descriptor.
+         */
+        function __promisify__(fd: number): Promise<void>;
+    }
+    /**
+     * Closes the file descriptor. Returns `undefined`.
+     *
+     * Calling `fs.closeSync()` on any file descriptor (`fd`) that is currently in use
+     * through any other `fs` operation may lead to undefined behavior.
+     *
+     * See the POSIX [`close(2)`](http://man7.org/linux/man-pages/man2/close.2.html) documentation for more detail.
+     * @since v0.1.21
+     */
+    function closeSync(fd: number): void;
+    /**
+     * Asynchronous file open. See the POSIX [`open(2)`](http://man7.org/linux/man-pages/man2/open.2.html) documentation for more details.
+     *
+     * `mode` sets the file mode (permission and sticky bits), but only if the file was
+     * created. On Windows, only the write permission can be manipulated; see {@link chmod}.
+     *
+     * The callback gets two arguments `(err, fd)`.
+     *
+     * Some characters (`< > : " / \ | ? *`) are reserved under Windows as documented
+     * by [Naming Files, Paths, and Namespaces](https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file). Under NTFS, if the filename contains
+     * a colon, Node.js will open a file system stream, as described by [this MSDN page](https://docs.microsoft.com/en-us/windows/desktop/FileIO/using-streams).
+     *
+     * Functions based on `fs.open()` exhibit this behavior as well:`fs.writeFile()`, `fs.readFile()`, etc.
+     * @since v0.0.2
+     * @param [flags='r'] See `support of file system `flags``.
+     * @param [mode=0o666]
+     */
+    function open(
+        path: PathLike,
+        flags: OpenMode | undefined,
+        mode: Mode | undefined | null,
+        callback: (err: NodeJS.ErrnoException | null, fd: number) => void,
+    ): void;
+    /**
+     * Asynchronous open(2) - open and possibly create a file. If the file is created, its mode will be `0o666`.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param [flags='r'] See `support of file system `flags``.
+     */
+    function open(
+        path: PathLike,
+        flags: OpenMode | undefined,
+        callback: (err: NodeJS.ErrnoException | null, fd: number) => void,
+    ): void;
+    /**
+     * Asynchronous open(2) - open and possibly create a file. If the file is created, its mode will be `0o666`.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     */
+    function open(path: PathLike, callback: (err: NodeJS.ErrnoException | null, fd: number) => void): void;
+    namespace open {
+        /**
+         * Asynchronous open(2) - open and possibly create a file.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param mode A file mode. If a string is passed, it is parsed as an octal integer. If not supplied, defaults to `0o666`.
+         */
+        function __promisify__(path: PathLike, flags: OpenMode, mode?: Mode | null): Promise<number>;
+    }
+    /**
+     * Returns an integer representing the file descriptor.
+     *
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link open}.
+     * @since v0.1.21
+     * @param [flags='r']
+     * @param [mode=0o666]
+     */
+    function openSync(path: PathLike, flags: OpenMode, mode?: Mode | null): number;
+    /**
+     * Change the file system timestamps of the object referenced by `path`.
+     *
+     * The `atime` and `mtime` arguments follow these rules:
+     *
+     * * Values can be either numbers representing Unix epoch time in seconds, `Date`s, or a numeric string like `'123456789.0'`.
+     * * If the value can not be converted to a number, or is `NaN`, `Infinity`, or `-Infinity`, an `Error` will be thrown.
+     * @since v0.4.2
+     */
+    function utimes(path: PathLike, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void;
+    namespace utimes {
+        /**
+         * Asynchronously change file timestamps of the file referenced by the supplied path.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * @param atime The last access time. If a string is provided, it will be coerced to number.
+         * @param mtime The last modified time. If a string is provided, it will be coerced to number.
+         */
+        function __promisify__(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>;
+    }
+    /**
+     * Returns `undefined`.
+     *
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link utimes}.
+     * @since v0.4.2
+     */
+    function utimesSync(path: PathLike, atime: TimeLike, mtime: TimeLike): void;
+    /**
+     * Change the file system timestamps of the object referenced by the supplied file
+     * descriptor. See {@link utimes}.
+     * @since v0.4.2
+     */
+    function futimes(fd: number, atime: TimeLike, mtime: TimeLike, callback: NoParamCallback): void;
+    namespace futimes {
+        /**
+         * Asynchronously change file timestamps of the file referenced by the supplied file descriptor.
+         * @param fd A file descriptor.
+         * @param atime The last access time. If a string is provided, it will be coerced to number.
+         * @param mtime The last modified time. If a string is provided, it will be coerced to number.
+         */
+        function __promisify__(fd: number, atime: TimeLike, mtime: TimeLike): Promise<void>;
+    }
+    /**
+     * Synchronous version of {@link futimes}. Returns `undefined`.
+     * @since v0.4.2
+     */
+    function futimesSync(fd: number, atime: TimeLike, mtime: TimeLike): void;
+    /**
+     * Request that all data for the open file descriptor is flushed to the storage
+     * device. The specific implementation is operating system and device specific.
+     * Refer to the POSIX [`fsync(2)`](http://man7.org/linux/man-pages/man2/fsync.2.html) documentation for more detail. No arguments other
+     * than a possible exception are given to the completion callback.
+     * @since v0.1.96
+     */
+    function fsync(fd: number, callback: NoParamCallback): void;
+    namespace fsync {
+        /**
+         * Asynchronous fsync(2) - synchronize a file's in-core state with the underlying storage device.
+         * @param fd A file descriptor.
+         */
+        function __promisify__(fd: number): Promise<void>;
+    }
+    /**
+     * Request that all data for the open file descriptor is flushed to the storage
+     * device. The specific implementation is operating system and device specific.
+     * Refer to the POSIX [`fsync(2)`](http://man7.org/linux/man-pages/man2/fsync.2.html) documentation for more detail. Returns `undefined`.
+     * @since v0.1.96
+     */
+    function fsyncSync(fd: number): void;
+    interface WriteOptions {
+        /**
+         * @default 0
+         */
+        offset?: number | undefined;
+        /**
+         * @default `buffer.byteLength - offset`
+         */
+        length?: number | undefined;
+        /**
+         * @default null
+         */
+        position?: number | null | undefined;
+    }
+    /**
+     * Write `buffer` to the file specified by `fd`.
+     *
+     * `offset` determines the part of the buffer to be written, and `length` is
+     * an integer specifying the number of bytes to write.
+     *
+     * `position` refers to the offset from the beginning of the file where this data
+     * should be written. If `typeof position !== 'number'`, the data will be written
+     * at the current position. See [`pwrite(2)`](http://man7.org/linux/man-pages/man2/pwrite.2.html).
+     *
+     * The callback will be given three arguments `(err, bytesWritten, buffer)` where `bytesWritten` specifies how many _bytes_ were written from `buffer`.
+     *
+     * If this method is invoked as its `util.promisify()` ed version, it returns
+     * a promise for an `Object` with `bytesWritten` and `buffer` properties.
+     *
+     * It is unsafe to use `fs.write()` multiple times on the same file without waiting
+     * for the callback. For this scenario, {@link createWriteStream} is
+     * recommended.
+     *
+     * On Linux, positional writes don't work when the file is opened in append mode.
+     * The kernel ignores the position argument and always appends the data to
+     * the end of the file.
+     * @since v0.0.2
+     * @param [offset=0]
+     * @param [length=buffer.byteLength - offset]
+     * @param [position='null']
+     */
+    function write<TBuffer extends NodeJS.ArrayBufferView>(
+        fd: number,
+        buffer: TBuffer,
+        offset: number | undefined | null,
+        length: number | undefined | null,
+        position: number | undefined | null,
+        callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void,
+    ): void;
+    /**
+     * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
+     * @param fd A file descriptor.
+     * @param offset The part of the buffer to be written. If not supplied, defaults to `0`.
+     * @param length The number of bytes to write. If not supplied, defaults to `buffer.length - offset`.
+     */
+    function write<TBuffer extends NodeJS.ArrayBufferView>(
+        fd: number,
+        buffer: TBuffer,
+        offset: number | undefined | null,
+        length: number | undefined | null,
+        callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void,
+    ): void;
+    /**
+     * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
+     * @param fd A file descriptor.
+     * @param offset The part of the buffer to be written. If not supplied, defaults to `0`.
+     */
+    function write<TBuffer extends NodeJS.ArrayBufferView>(
+        fd: number,
+        buffer: TBuffer,
+        offset: number | undefined | null,
+        callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void,
+    ): void;
+    /**
+     * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
+     * @param fd A file descriptor.
+     */
+    function write<TBuffer extends NodeJS.ArrayBufferView>(
+        fd: number,
+        buffer: TBuffer,
+        callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void,
+    ): void;
+    /**
+     * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
+     * @param fd A file descriptor.
+     * @param options An object with the following properties:
+     * * `offset` The part of the buffer to be written. If not supplied, defaults to `0`.
+     * * `length` The number of bytes to write. If not supplied, defaults to `buffer.length - offset`.
+     * * `position` The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
+     */
+    function write<TBuffer extends NodeJS.ArrayBufferView>(
+        fd: number,
+        buffer: TBuffer,
+        options: WriteOptions,
+        callback: (err: NodeJS.ErrnoException | null, written: number, buffer: TBuffer) => void,
+    ): void;
+    /**
+     * Asynchronously writes `string` to the file referenced by the supplied file descriptor.
+     * @param fd A file descriptor.
+     * @param string A string to write.
+     * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
+     * @param encoding The expected string encoding.
+     */
+    function write(
+        fd: number,
+        string: string,
+        position: number | undefined | null,
+        encoding: BufferEncoding | undefined | null,
+        callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void,
+    ): void;
+    /**
+     * Asynchronously writes `string` to the file referenced by the supplied file descriptor.
+     * @param fd A file descriptor.
+     * @param string A string to write.
+     * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
+     */
+    function write(
+        fd: number,
+        string: string,
+        position: number | undefined | null,
+        callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void,
+    ): void;
+    /**
+     * Asynchronously writes `string` to the file referenced by the supplied file descriptor.
+     * @param fd A file descriptor.
+     * @param string A string to write.
+     */
+    function write(
+        fd: number,
+        string: string,
+        callback: (err: NodeJS.ErrnoException | null, written: number, str: string) => void,
+    ): void;
+    namespace write {
+        /**
+         * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
+         * @param fd A file descriptor.
+         * @param offset The part of the buffer to be written. If not supplied, defaults to `0`.
+         * @param length The number of bytes to write. If not supplied, defaults to `buffer.length - offset`.
+         * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
+         */
+        function __promisify__<TBuffer extends NodeJS.ArrayBufferView>(
+            fd: number,
+            buffer?: TBuffer,
+            offset?: number,
+            length?: number,
+            position?: number | null,
+        ): Promise<{
+            bytesWritten: number;
+            buffer: TBuffer;
+        }>;
+        /**
+         * Asynchronously writes `buffer` to the file referenced by the supplied file descriptor.
+         * @param fd A file descriptor.
+         * @param options An object with the following properties:
+         * * `offset` The part of the buffer to be written. If not supplied, defaults to `0`.
+         * * `length` The number of bytes to write. If not supplied, defaults to `buffer.length - offset`.
+         * * `position` The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
+         */
+        function __promisify__<TBuffer extends NodeJS.ArrayBufferView>(
+            fd: number,
+            buffer?: TBuffer,
+            options?: WriteOptions,
+        ): Promise<{
+            bytesWritten: number;
+            buffer: TBuffer;
+        }>;
+        /**
+         * Asynchronously writes `string` to the file referenced by the supplied file descriptor.
+         * @param fd A file descriptor.
+         * @param string A string to write.
+         * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
+         * @param encoding The expected string encoding.
+         */
+        function __promisify__(
+            fd: number,
+            string: string,
+            position?: number | null,
+            encoding?: BufferEncoding | null,
+        ): Promise<{
+            bytesWritten: number;
+            buffer: string;
+        }>;
+    }
+    /**
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link write}.
+     * @since v0.1.21
+     * @param [offset=0]
+     * @param [length=buffer.byteLength - offset]
+     * @param [position='null']
+     * @return The number of bytes written.
+     */
+    function writeSync(
+        fd: number,
+        buffer: NodeJS.ArrayBufferView,
+        offset?: number | null,
+        length?: number | null,
+        position?: number | null,
+    ): number;
+    /**
+     * Synchronously writes `string` to the file referenced by the supplied file descriptor, returning the number of bytes written.
+     * @param fd A file descriptor.
+     * @param string A string to write.
+     * @param position The offset from the beginning of the file where this data should be written. If not supplied, defaults to the current position.
+     * @param encoding The expected string encoding.
+     */
+    function writeSync(
+        fd: number,
+        string: string,
+        position?: number | null,
+        encoding?: BufferEncoding | null,
+    ): number;
+    type ReadPosition = number | bigint;
+    interface ReadOptions {
+        /**
+         * @default 0
+         */
+        offset?: number | undefined;
+        /**
+         * @default `length of buffer`
+         */
+        length?: number | undefined;
+        /**
+         * @default null
+         */
+        position?: ReadPosition | null | undefined;
+    }
+    interface ReadOptionsWithBuffer<T extends NodeJS.ArrayBufferView> extends ReadOptions {
+        buffer?: T | undefined;
+    }
+    /** @deprecated Use `ReadOptions` instead. */
+    // TODO: remove in future major
+    interface ReadSyncOptions extends ReadOptions {}
+    /** @deprecated Use `ReadOptionsWithBuffer` instead. */
+    // TODO: remove in future major
+    interface ReadAsyncOptions<T extends NodeJS.ArrayBufferView> extends ReadOptionsWithBuffer<T> {}
+    /**
+     * Read data from the file specified by `fd`.
+     *
+     * The callback is given the three arguments, `(err, bytesRead, buffer)`.
+     *
+     * If the file is not modified concurrently, the end-of-file is reached when the
+     * number of bytes read is zero.
+     *
+     * If this method is invoked as its `util.promisify()` ed version, it returns
+     * a promise for an `Object` with `bytesRead` and `buffer` properties.
+     * @since v0.0.2
+     * @param buffer The buffer that the data will be written to.
+     * @param offset The position in `buffer` to write the data to.
+     * @param length The number of bytes to read.
+     * @param position Specifies where to begin reading from in the file. If `position` is `null` or `-1 `, data will be read from the current file position, and the file position will be updated. If
+     * `position` is an integer, the file position will be unchanged.
+     */
+    function read<TBuffer extends NodeJS.ArrayBufferView>(
+        fd: number,
+        buffer: TBuffer,
+        offset: number,
+        length: number,
+        position: ReadPosition | null,
+        callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: TBuffer) => void,
+    ): void;
+    /**
+     * Similar to the above `fs.read` function, this version takes an optional `options` object.
+     * If not otherwise specified in an `options` object,
+     * `buffer` defaults to `Buffer.alloc(16384)`,
+     * `offset` defaults to `0`,
+     * `length` defaults to `buffer.byteLength`, `- offset` as of Node 17.6.0
+     * `position` defaults to `null`
+     * @since v12.17.0, 13.11.0
+     */
+    function read<TBuffer extends NodeJS.ArrayBufferView = NonSharedBuffer>(
+        fd: number,
+        options: ReadOptionsWithBuffer<TBuffer>,
+        callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: TBuffer) => void,
+    ): void;
+    function read<TBuffer extends NodeJS.ArrayBufferView>(
+        fd: number,
+        buffer: TBuffer,
+        options: ReadOptions,
+        callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: TBuffer) => void,
+    ): void;
+    function read<TBuffer extends NodeJS.ArrayBufferView>(
+        fd: number,
+        buffer: TBuffer,
+        callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: TBuffer) => void,
+    ): void;
+    function read(
+        fd: number,
+        callback: (err: NodeJS.ErrnoException | null, bytesRead: number, buffer: NonSharedBuffer) => void,
+    ): void;
+    namespace read {
+        /**
+         * @param fd A file descriptor.
+         * @param buffer The buffer that the data will be written to.
+         * @param offset The offset in the buffer at which to start writing.
+         * @param length The number of bytes to read.
+         * @param position The offset from the beginning of the file from which data should be read. If `null`, data will be read from the current position.
+         */
+        function __promisify__<TBuffer extends NodeJS.ArrayBufferView>(
+            fd: number,
+            buffer: TBuffer,
+            offset: number,
+            length: number,
+            position: ReadPosition | null,
+        ): Promise<{
+            bytesRead: number;
+            buffer: TBuffer;
+        }>;
+        function __promisify__<TBuffer extends NodeJS.ArrayBufferView = NonSharedBuffer>(
+            fd: number,
+            options: ReadOptionsWithBuffer<TBuffer>,
+        ): Promise<{
+            bytesRead: number;
+            buffer: TBuffer;
+        }>;
+        function __promisify__(fd: number): Promise<{
+            bytesRead: number;
+            buffer: NonSharedBuffer;
+        }>;
+    }
+    /**
+     * Returns the number of `bytesRead`.
+     *
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link read}.
+     * @since v0.1.21
+     * @param [position='null']
+     */
+    function readSync(
+        fd: number,
+        buffer: NodeJS.ArrayBufferView,
+        offset: number,
+        length: number,
+        position: ReadPosition | null,
+    ): number;
+    /**
+     * Similar to the above `fs.readSync` function, this version takes an optional `options` object.
+     * If no `options` object is specified, it will default with the above values.
+     */
+    function readSync(fd: number, buffer: NodeJS.ArrayBufferView, opts?: ReadOptions): number;
+    /**
+     * Asynchronously reads the entire contents of a file.
+     *
+     * ```js
+     * import { readFile } from 'node:fs';
+     *
+     * readFile('/etc/passwd', (err, data) => {
+     *   if (err) throw err;
+     *   console.log(data);
+     * });
+     * ```
+     *
+     * The callback is passed two arguments `(err, data)`, where `data` is the
+     * contents of the file.
+     *
+     * If no encoding is specified, then the raw buffer is returned.
+     *
+     * If `options` is a string, then it specifies the encoding:
+     *
+     * ```js
+     * import { readFile } from 'node:fs';
+     *
+     * readFile('/etc/passwd', 'utf8', callback);
+     * ```
+     *
+     * When the path is a directory, the behavior of `fs.readFile()` and {@link readFileSync} is platform-specific. On macOS, Linux, and Windows, an
+     * error will be returned. On FreeBSD, a representation of the directory's contents
+     * will be returned.
+     *
+     * ```js
+     * import { readFile } from 'node:fs';
+     *
+     * // macOS, Linux, and Windows
+     * readFile('<directory>', (err, data) => {
+     *   // => [Error: EISDIR: illegal operation on a directory, read <directory>]
+     * });
+     *
+     * //  FreeBSD
+     * readFile('<directory>', (err, data) => {
+     *   // => null, <data>
+     * });
+     * ```
+     *
+     * It is possible to abort an ongoing request using an `AbortSignal`. If a
+     * request is aborted the callback is called with an `AbortError`:
+     *
+     * ```js
+     * import { readFile } from 'node:fs';
+     *
+     * const controller = new AbortController();
+     * const signal = controller.signal;
+     * readFile(fileInfo[0].name, { signal }, (err, buf) => {
+     *   // ...
+     * });
+     * // When you want to abort the request
+     * controller.abort();
+     * ```
+     *
+     * The `fs.readFile()` function buffers the entire file. To minimize memory costs,
+     * when possible prefer streaming via `fs.createReadStream()`.
+     *
+     * Aborting an ongoing request does not abort individual operating
+     * system requests but rather the internal buffering `fs.readFile` performs.
+     * @since v0.1.29
+     * @param path filename or file descriptor
+     */
+    function readFile(
+        path: PathOrFileDescriptor,
+        options:
+            | ({
+                encoding?: null | undefined;
+                flag?: string | undefined;
+            } & Abortable)
+            | undefined
+            | null,
+        callback: (err: NodeJS.ErrnoException | null, data: NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Asynchronously reads the entire contents of a file.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+     * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
+     * If a flag is not provided, it defaults to `'r'`.
+     */
+    function readFile(
+        path: PathOrFileDescriptor,
+        options:
+            | ({
+                encoding: BufferEncoding;
+                flag?: string | undefined;
+            } & Abortable)
+            | BufferEncoding,
+        callback: (err: NodeJS.ErrnoException | null, data: string) => void,
+    ): void;
+    /**
+     * Asynchronously reads the entire contents of a file.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+     * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
+     * If a flag is not provided, it defaults to `'r'`.
+     */
+    function readFile(
+        path: PathOrFileDescriptor,
+        options:
+            | (ObjectEncodingOptions & {
+                flag?: string | undefined;
+            } & Abortable)
+            | BufferEncoding
+            | undefined
+            | null,
+        callback: (err: NodeJS.ErrnoException | null, data: string | NonSharedBuffer) => void,
+    ): void;
+    /**
+     * Asynchronously reads the entire contents of a file.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+     */
+    function readFile(
+        path: PathOrFileDescriptor,
+        callback: (err: NodeJS.ErrnoException | null, data: NonSharedBuffer) => void,
+    ): void;
+    namespace readFile {
+        /**
+         * Asynchronously reads the entire contents of a file.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+         * @param options An object that may contain an optional flag.
+         * If a flag is not provided, it defaults to `'r'`.
+         */
+        function __promisify__(
+            path: PathOrFileDescriptor,
+            options?: {
+                encoding?: null | undefined;
+                flag?: string | undefined;
+            } | null,
+        ): Promise<NonSharedBuffer>;
+        /**
+         * Asynchronously reads the entire contents of a file.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * URL support is _experimental_.
+         * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+         * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
+         * If a flag is not provided, it defaults to `'r'`.
+         */
+        function __promisify__(
+            path: PathOrFileDescriptor,
+            options:
+                | {
+                    encoding: BufferEncoding;
+                    flag?: string | undefined;
+                }
+                | BufferEncoding,
+        ): Promise<string>;
+        /**
+         * Asynchronously reads the entire contents of a file.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * URL support is _experimental_.
+         * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+         * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
+         * If a flag is not provided, it defaults to `'r'`.
+         */
+        function __promisify__(
+            path: PathOrFileDescriptor,
+            options?:
+                | (ObjectEncodingOptions & {
+                    flag?: string | undefined;
+                })
+                | BufferEncoding
+                | null,
+        ): Promise<string | NonSharedBuffer>;
+    }
+    /**
+     * Returns the contents of the `path`.
+     *
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link readFile}.
+     *
+     * If the `encoding` option is specified then this function returns a
+     * string. Otherwise it returns a buffer.
+     *
+     * Similar to {@link readFile}, when the path is a directory, the behavior of `fs.readFileSync()` is platform-specific.
+     *
+     * ```js
+     * import { readFileSync } from 'node:fs';
+     *
+     * // macOS, Linux, and Windows
+     * readFileSync('<directory>');
+     * // => [Error: EISDIR: illegal operation on a directory, read <directory>]
+     *
+     * //  FreeBSD
+     * readFileSync('<directory>'); // => <data>
+     * ```
+     * @since v0.1.8
+     * @param path filename or file descriptor
+     */
+    function readFileSync(
+        path: PathOrFileDescriptor,
+        options?: {
+            encoding?: null | undefined;
+            flag?: string | undefined;
+        } | null,
+    ): NonSharedBuffer;
+    /**
+     * Synchronously reads the entire contents of a file.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+     * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
+     * If a flag is not provided, it defaults to `'r'`.
+     */
+    function readFileSync(
+        path: PathOrFileDescriptor,
+        options:
+            | {
+                encoding: BufferEncoding;
+                flag?: string | undefined;
+            }
+            | BufferEncoding,
+    ): string;
+    /**
+     * Synchronously reads the entire contents of a file.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+     * @param options Either the encoding for the result, or an object that contains the encoding and an optional flag.
+     * If a flag is not provided, it defaults to `'r'`.
+     */
+    function readFileSync(
+        path: PathOrFileDescriptor,
+        options?:
+            | (ObjectEncodingOptions & {
+                flag?: string | undefined;
+            })
+            | BufferEncoding
+            | null,
+    ): string | NonSharedBuffer;
+    type WriteFileOptions =
+        | (
+            & ObjectEncodingOptions
+            & Abortable
+            & {
+                mode?: Mode | undefined;
+                flag?: string | undefined;
+                flush?: boolean | undefined;
+            }
+        )
+        | BufferEncoding
+        | null;
+    /**
+     * When `file` is a filename, asynchronously writes data to the file, replacing the
+     * file if it already exists. `data` can be a string or a buffer.
+     *
+     * When `file` is a file descriptor, the behavior is similar to calling `fs.write()` directly (which is recommended). See the notes below on using
+     * a file descriptor.
+     *
+     * The `encoding` option is ignored if `data` is a buffer.
+     *
+     * The `mode` option only affects the newly created file. See {@link open} for more details.
+     *
+     * ```js
+     * import { writeFile } from 'node:fs';
+     * import { Buffer } from 'node:buffer';
+     *
+     * const data = new Uint8Array(Buffer.from('Hello Node.js'));
+     * writeFile('message.txt', data, (err) => {
+     *   if (err) throw err;
+     *   console.log('The file has been saved!');
+     * });
+     * ```
+     *
+     * If `options` is a string, then it specifies the encoding:
+     *
+     * ```js
+     * import { writeFile } from 'node:fs';
+     *
+     * writeFile('message.txt', 'Hello Node.js', 'utf8', callback);
+     * ```
+     *
+     * It is unsafe to use `fs.writeFile()` multiple times on the same file without
+     * waiting for the callback. For this scenario, {@link createWriteStream} is
+     * recommended.
+     *
+     * Similarly to `fs.readFile` \- `fs.writeFile` is a convenience method that
+     * performs multiple `write` calls internally to write the buffer passed to it.
+     * For performance sensitive code consider using {@link createWriteStream}.
+     *
+     * It is possible to use an `AbortSignal` to cancel an `fs.writeFile()`.
+     * Cancelation is "best effort", and some amount of data is likely still
+     * to be written.
+     *
+     * ```js
+     * import { writeFile } from 'node:fs';
+     * import { Buffer } from 'node:buffer';
+     *
+     * const controller = new AbortController();
+     * const { signal } = controller;
+     * const data = new Uint8Array(Buffer.from('Hello Node.js'));
+     * writeFile('message.txt', data, { signal }, (err) => {
+     *   // When a request is aborted - the callback is called with an AbortError
+     * });
+     * // When the request should be aborted
+     * controller.abort();
+     * ```
+     *
+     * Aborting an ongoing request does not abort individual operating
+     * system requests but rather the internal buffering `fs.writeFile` performs.
+     * @since v0.1.29
+     * @param file filename or file descriptor
+     */
+    function writeFile(
+        file: PathOrFileDescriptor,
+        data: string | NodeJS.ArrayBufferView,
+        options: WriteFileOptions,
+        callback: NoParamCallback,
+    ): void;
+    /**
+     * Asynchronously writes data to a file, replacing the file if it already exists.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+     * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
+     */
+    function writeFile(
+        path: PathOrFileDescriptor,
+        data: string | NodeJS.ArrayBufferView,
+        callback: NoParamCallback,
+    ): void;
+    namespace writeFile {
+        /**
+         * Asynchronously writes data to a file, replacing the file if it already exists.
+         * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * URL support is _experimental_.
+         * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+         * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
+         * @param options Either the encoding for the file, or an object optionally specifying the encoding, file mode, and flag.
+         * If `encoding` is not supplied, the default of `'utf8'` is used.
+         * If `mode` is not supplied, the default of `0o666` is used.
+         * If `mode` is a string, it is parsed as an octal integer.
+         * If `flag` is not supplied, the default of `'w'` is used.
+         */
+        function __promisify__(
+            path: PathOrFileDescriptor,
+            data: string | NodeJS.ArrayBufferView,
+            options?: WriteFileOptions,
+        ): Promise<void>;
+    }
+    /**
+     * Returns `undefined`.
+     *
+     * The `mode` option only affects the newly created file. See {@link open} for more details.
+     *
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link writeFile}.
+     * @since v0.1.29
+     * @param file filename or file descriptor
+     */
+    function writeFileSync(
+        file: PathOrFileDescriptor,
+        data: string | NodeJS.ArrayBufferView,
+        options?: WriteFileOptions,
+    ): void;
+    /**
+     * Asynchronously append data to a file, creating the file if it does not yet
+     * exist. `data` can be a string or a `Buffer`.
+     *
+     * The `mode` option only affects the newly created file. See {@link open} for more details.
+     *
+     * ```js
+     * import { appendFile } from 'node:fs';
+     *
+     * appendFile('message.txt', 'data to append', (err) => {
+     *   if (err) throw err;
+     *   console.log('The "data to append" was appended to file!');
+     * });
+     * ```
+     *
+     * If `options` is a string, then it specifies the encoding:
+     *
+     * ```js
+     * import { appendFile } from 'node:fs';
+     *
+     * appendFile('message.txt', 'data to append', 'utf8', callback);
+     * ```
+     *
+     * The `path` may be specified as a numeric file descriptor that has been opened
+     * for appending (using `fs.open()` or `fs.openSync()`). The file descriptor will
+     * not be closed automatically.
+     *
+     * ```js
+     * import { open, close, appendFile } from 'node:fs';
+     *
+     * function closeFd(fd) {
+     *   close(fd, (err) => {
+     *     if (err) throw err;
+     *   });
+     * }
+     *
+     * open('message.txt', 'a', (err, fd) => {
+     *   if (err) throw err;
+     *
+     *   try {
+     *     appendFile(fd, 'data to append', 'utf8', (err) => {
+     *       closeFd(fd);
+     *       if (err) throw err;
+     *     });
+     *   } catch (err) {
+     *     closeFd(fd);
+     *     throw err;
+     *   }
+     * });
+     * ```
+     * @since v0.6.7
+     * @param path filename or file descriptor
+     */
+    function appendFile(
+        path: PathOrFileDescriptor,
+        data: string | Uint8Array,
+        options: WriteFileOptions,
+        callback: NoParamCallback,
+    ): void;
+    /**
+     * Asynchronously append data to a file, creating the file if it does not exist.
+     * @param file A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+     * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
+     */
+    function appendFile(file: PathOrFileDescriptor, data: string | Uint8Array, callback: NoParamCallback): void;
+    namespace appendFile {
+        /**
+         * Asynchronously append data to a file, creating the file if it does not exist.
+         * @param file A path to a file. If a URL is provided, it must use the `file:` protocol.
+         * URL support is _experimental_.
+         * If a file descriptor is provided, the underlying file will _not_ be closed automatically.
+         * @param data The data to write. If something other than a Buffer or Uint8Array is provided, the value is coerced to a string.
+         * @param options Either the encoding for the file, or an object optionally specifying the encoding, file mode, and flag.
+         * If `encoding` is not supplied, the default of `'utf8'` is used.
+         * If `mode` is not supplied, the default of `0o666` is used.
+         * If `mode` is a string, it is parsed as an octal integer.
+         * If `flag` is not supplied, the default of `'a'` is used.
+         */
+        function __promisify__(
+            file: PathOrFileDescriptor,
+            data: string | Uint8Array,
+            options?: WriteFileOptions,
+        ): Promise<void>;
+    }
+    /**
+     * Synchronously append data to a file, creating the file if it does not yet
+     * exist. `data` can be a string or a `Buffer`.
+     *
+     * The `mode` option only affects the newly created file. See {@link open} for more details.
+     *
+     * ```js
+     * import { appendFileSync } from 'node:fs';
+     *
+     * try {
+     *   appendFileSync('message.txt', 'data to append');
+     *   console.log('The "data to append" was appended to file!');
+     * } catch (err) {
+     *   // Handle the error
+     * }
+     * ```
+     *
+     * If `options` is a string, then it specifies the encoding:
+     *
+     * ```js
+     * import { appendFileSync } from 'node:fs';
+     *
+     * appendFileSync('message.txt', 'data to append', 'utf8');
+     * ```
+     *
+     * The `path` may be specified as a numeric file descriptor that has been opened
+     * for appending (using `fs.open()` or `fs.openSync()`). The file descriptor will
+     * not be closed automatically.
+     *
+     * ```js
+     * import { openSync, closeSync, appendFileSync } from 'node:fs';
+     *
+     * let fd;
+     *
+     * try {
+     *   fd = openSync('message.txt', 'a');
+     *   appendFileSync(fd, 'data to append', 'utf8');
+     * } catch (err) {
+     *   // Handle the error
+     * } finally {
+     *   if (fd !== undefined)
+     *     closeSync(fd);
+     * }
+     * ```
+     * @since v0.6.7
+     * @param path filename or file descriptor
+     */
+    function appendFileSync(
+        path: PathOrFileDescriptor,
+        data: string | Uint8Array,
+        options?: WriteFileOptions,
+    ): void;
+    /**
+     * Watch for changes on `filename`. The callback `listener` will be called each
+     * time the file is accessed.
+     *
+     * The `options` argument may be omitted. If provided, it should be an object. The `options` object may contain a boolean named `persistent` that indicates
+     * whether the process should continue to run as long as files are being watched.
+     * The `options` object may specify an `interval` property indicating how often the
+     * target should be polled in milliseconds.
+     *
+     * The `listener` gets two arguments the current stat object and the previous
+     * stat object:
+     *
+     * ```js
+     * import { watchFile } from 'node:fs';
+     *
+     * watchFile('message.text', (curr, prev) => {
+     *   console.log(`the current mtime is: ${curr.mtime}`);
+     *   console.log(`the previous mtime was: ${prev.mtime}`);
+     * });
+     * ```
+     *
+     * These stat objects are instances of `fs.Stat`. If the `bigint` option is `true`,
+     * the numeric values in these objects are specified as `BigInt`s.
+     *
+     * To be notified when the file was modified, not just accessed, it is necessary
+     * to compare `curr.mtimeMs` and `prev.mtimeMs`.
+     *
+     * When an `fs.watchFile` operation results in an `ENOENT` error, it
+     * will invoke the listener once, with all the fields zeroed (or, for dates, the
+     * Unix Epoch). If the file is created later on, the listener will be called
+     * again, with the latest stat objects. This is a change in functionality since
+     * v0.10.
+     *
+     * Using {@link watch} is more efficient than `fs.watchFile` and `fs.unwatchFile`. `fs.watch` should be used instead of `fs.watchFile` and `fs.unwatchFile` when possible.
+     *
+     * When a file being watched by `fs.watchFile()` disappears and reappears,
+     * then the contents of `previous` in the second callback event (the file's
+     * reappearance) will be the same as the contents of `previous` in the first
+     * callback event (its disappearance).
+     *
+     * This happens when:
+     *
+     * * the file is deleted, followed by a restore
+     * * the file is renamed and then renamed a second time back to its original name
+     * @since v0.1.31
+     */
+    interface WatchFileOptions {
+        bigint?: boolean | undefined;
+        persistent?: boolean | undefined;
+        interval?: number | undefined;
+    }
+    /**
+     * Watch for changes on `filename`. The callback `listener` will be called each
+     * time the file is accessed.
+     *
+     * The `options` argument may be omitted. If provided, it should be an object. The `options` object may contain a boolean named `persistent` that indicates
+     * whether the process should continue to run as long as files are being watched.
+     * The `options` object may specify an `interval` property indicating how often the
+     * target should be polled in milliseconds.
+     *
+     * The `listener` gets two arguments the current stat object and the previous
+     * stat object:
+     *
+     * ```js
+     * import { watchFile } from 'node:fs';
+     *
+     * watchFile('message.text', (curr, prev) => {
+     *   console.log(`the current mtime is: ${curr.mtime}`);
+     *   console.log(`the previous mtime was: ${prev.mtime}`);
+     * });
+     * ```
+     *
+     * These stat objects are instances of `fs.Stat`. If the `bigint` option is `true`,
+     * the numeric values in these objects are specified as `BigInt`s.
+     *
+     * To be notified when the file was modified, not just accessed, it is necessary
+     * to compare `curr.mtimeMs` and `prev.mtimeMs`.
+     *
+     * When an `fs.watchFile` operation results in an `ENOENT` error, it
+     * will invoke the listener once, with all the fields zeroed (or, for dates, the
+     * Unix Epoch). If the file is created later on, the listener will be called
+     * again, with the latest stat objects. This is a change in functionality since
+     * v0.10.
+     *
+     * Using {@link watch} is more efficient than `fs.watchFile` and `fs.unwatchFile`. `fs.watch` should be used instead of `fs.watchFile` and `fs.unwatchFile` when possible.
+     *
+     * When a file being watched by `fs.watchFile()` disappears and reappears,
+     * then the contents of `previous` in the second callback event (the file's
+     * reappearance) will be the same as the contents of `previous` in the first
+     * callback event (its disappearance).
+     *
+     * This happens when:
+     *
+     * * the file is deleted, followed by a restore
+     * * the file is renamed and then renamed a second time back to its original name
+     * @since v0.1.31
+     */
+    function watchFile(
+        filename: PathLike,
+        options:
+            | (WatchFileOptions & {
+                bigint?: false | undefined;
+            })
+            | undefined,
+        listener: StatsListener,
+    ): StatWatcher;
+    function watchFile(
+        filename: PathLike,
+        options:
+            | (WatchFileOptions & {
+                bigint: true;
+            })
+            | undefined,
+        listener: BigIntStatsListener,
+    ): StatWatcher;
+    /**
+     * Watch for changes on `filename`. The callback `listener` will be called each time the file is accessed.
+     * @param filename A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
+     */
+    function watchFile(filename: PathLike, listener: StatsListener): StatWatcher;
+    /**
+     * Stop watching for changes on `filename`. If `listener` is specified, only that
+     * particular listener is removed. Otherwise, _all_ listeners are removed,
+     * effectively stopping watching of `filename`.
+     *
+     * Calling `fs.unwatchFile()` with a filename that is not being watched is a
+     * no-op, not an error.
+     *
+     * Using {@link watch} is more efficient than `fs.watchFile()` and `fs.unwatchFile()`. `fs.watch()` should be used instead of `fs.watchFile()` and `fs.unwatchFile()` when possible.
+     * @since v0.1.31
+     * @param listener Optional, a listener previously attached using `fs.watchFile()`
+     */
+    function unwatchFile(filename: PathLike, listener?: StatsListener): void;
+    function unwatchFile(filename: PathLike, listener?: BigIntStatsListener): void;
+    type WatchIgnorePredicate = string | RegExp | ((filename: string) => boolean);
+    interface WatchOptions extends Abortable {
+        encoding?: BufferEncoding | "buffer" | undefined;
+        persistent?: boolean | undefined;
+        recursive?: boolean | undefined;
+        ignore?: WatchIgnorePredicate | readonly WatchIgnorePredicate[] | undefined;
+    }
+    interface WatchOptionsWithBufferEncoding extends WatchOptions {
+        encoding: "buffer";
+    }
+    interface WatchOptionsWithStringEncoding extends WatchOptions {
+        encoding?: BufferEncoding | undefined;
+    }
+    type WatchEventType = "rename" | "change";
+    type WatchListener<T> = (event: WatchEventType, filename: T | null) => void;
+    type StatsListener = (curr: Stats, prev: Stats) => void;
+    type BigIntStatsListener = (curr: BigIntStats, prev: BigIntStats) => void;
+    /**
+     * Watch for changes on `filename`, where `filename` is either a file or a
+     * directory.
+     *
+     * The second argument is optional. If `options` is provided as a string, it
+     * specifies the `encoding`. Otherwise `options` should be passed as an object.
+     *
+     * The listener callback gets two arguments `(eventType, filename)`. `eventType`is either `'rename'` or `'change'`, and `filename` is the name of the file
+     * which triggered the event.
+     *
+     * On most platforms, `'rename'` is emitted whenever a filename appears or
+     * disappears in the directory.
+     *
+     * The listener callback is attached to the `'change'` event fired by `fs.FSWatcher`, but it is not the same thing as the `'change'` value of `eventType`.
+     *
+     * If a `signal` is passed, aborting the corresponding AbortController will close
+     * the returned `fs.FSWatcher`.
+     * @since v0.5.10
+     * @param listener
+     */
+    function watch(
+        filename: PathLike,
+        options?: WatchOptionsWithStringEncoding | BufferEncoding | null,
+        listener?: WatchListener<string>,
+    ): FSWatcher;
+    function watch(
+        filename: PathLike,
+        options: WatchOptionsWithBufferEncoding | "buffer",
+        listener: WatchListener<NonSharedBuffer>,
+    ): FSWatcher;
+    function watch(
+        filename: PathLike,
+        options: WatchOptions | BufferEncoding | "buffer" | null,
+        listener: WatchListener<string | NonSharedBuffer>,
+    ): FSWatcher;
+    function watch(filename: PathLike, listener: WatchListener<string>): FSWatcher;
+    /**
+     * Test whether or not the given path exists by checking with the file system.
+     * Then call the `callback` argument with either true or false:
+     *
+     * ```js
+     * import { exists } from 'node:fs';
+     *
+     * exists('/etc/passwd', (e) => {
+     *   console.log(e ? 'it exists' : 'no passwd!');
+     * });
+     * ```
+     *
+     * **The parameters for this callback are not consistent with other Node.js**
+     * **callbacks.** Normally, the first parameter to a Node.js callback is an `err` parameter, optionally followed by other parameters. The `fs.exists()` callback
+     * has only one boolean parameter. This is one reason `fs.access()` is recommended
+     * instead of `fs.exists()`.
+     *
+     * Using `fs.exists()` to check for the existence of a file before calling `fs.open()`, `fs.readFile()`, or `fs.writeFile()` is not recommended. Doing
+     * so introduces a race condition, since other processes may change the file's
+     * state between the two calls. Instead, user code should open/read/write the
+     * file directly and handle the error raised if the file does not exist.
+     *
+     * **write (NOT RECOMMENDED)**
+     *
+     * ```js
+     * import { exists, open, close } from 'node:fs';
+     *
+     * exists('myfile', (e) => {
+     *   if (e) {
+     *     console.error('myfile already exists');
+     *   } else {
+     *     open('myfile', 'wx', (err, fd) => {
+     *       if (err) throw err;
+     *
+     *       try {
+     *         writeMyData(fd);
+     *       } finally {
+     *         close(fd, (err) => {
+     *           if (err) throw err;
+     *         });
+     *       }
+     *     });
+     *   }
+     * });
+     * ```
+     *
+     * **write (RECOMMENDED)**
+     *
+     * ```js
+     * import { open, close } from 'node:fs';
+     * open('myfile', 'wx', (err, fd) => {
+     *   if (err) {
+     *     if (err.code === 'EEXIST') {
+     *       console.error('myfile already exists');
+     *       return;
+     *     }
+     *
+     *     throw err;
+     *   }
+     *
+     *   try {
+     *     writeMyData(fd);
+     *   } finally {
+     *     close(fd, (err) => {
+     *       if (err) throw err;
+     *     });
+     *   }
+     * });
+     * ```
+     *
+     * **read (NOT RECOMMENDED)**
+     *
+     * ```js
+     * import { open, close, exists } from 'node:fs';
+     *
+     * exists('myfile', (e) => {
+     *   if (e) {
+     *     open('myfile', 'r', (err, fd) => {
+     *       if (err) throw err;
+     *
+     *       try {
+     *         readMyData(fd);
+     *       } finally {
+     *         close(fd, (err) => {
+     *           if (err) throw err;
+     *         });
+     *       }
+     *     });
+     *   } else {
+     *     console.error('myfile does not exist');
+     *   }
+     * });
+     * ```
+     *
+     * **read (RECOMMENDED)**
+     *
+     * ```js
+     * import { open, close } from 'node:fs';
+     *
+     * open('myfile', 'r', (err, fd) => {
+     *   if (err) {
+     *     if (err.code === 'ENOENT') {
+     *       console.error('myfile does not exist');
+     *       return;
+     *     }
+     *
+     *     throw err;
+     *   }
+     *
+     *   try {
+     *     readMyData(fd);
+     *   } finally {
+     *     close(fd, (err) => {
+     *       if (err) throw err;
+     *     });
+     *   }
+     * });
+     * ```
+     *
+     * The "not recommended" examples above check for existence and then use the
+     * file; the "recommended" examples are better because they use the file directly
+     * and handle the error, if any.
+     *
+     * In general, check for the existence of a file only if the file won't be
+     * used directly, for example when its existence is a signal from another
+     * process.
+     * @since v0.0.2
+     * @deprecated Since v1.0.0 - Use {@link stat} or {@link access} instead.
+     */
+    function exists(path: PathLike, callback: (exists: boolean) => void): void;
+    /** @deprecated */
+    namespace exists {
+        /**
+         * @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
+         * URL support is _experimental_.
+         */
+        function __promisify__(path: PathLike): Promise<boolean>;
+    }
+    /**
+     * Returns `true` if the path exists, `false` otherwise.
+     *
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link exists}.
+     *
+     * `fs.exists()` is deprecated, but `fs.existsSync()` is not. The `callback` parameter to `fs.exists()` accepts parameters that are inconsistent with other
+     * Node.js callbacks. `fs.existsSync()` does not use a callback.
+     *
+     * ```js
+     * import { existsSync } from 'node:fs';
+     *
+     * if (existsSync('/etc/passwd'))
+     *   console.log('The path exists.');
+     * ```
+     * @since v0.1.21
+     */
+    function existsSync(path: PathLike): boolean;
+    namespace constants {
+        // File Access Constants
+        /** Constant for fs.access(). File is visible to the calling process. */
+        const F_OK: number;
+        /** Constant for fs.access(). File can be read by the calling process. */
+        const R_OK: number;
+        /** Constant for fs.access(). File can be written by the calling process. */
+        const W_OK: number;
+        /** Constant for fs.access(). File can be executed by the calling process. */
+        const X_OK: number;
+        // File Copy Constants
+        /** Constant for fs.copyFile. Flag indicating the destination file should not be overwritten if it already exists. */
+        const COPYFILE_EXCL: number;
+        /**
+         * Constant for fs.copyFile. copy operation will attempt to create a copy-on-write reflink.
+         * If the underlying platform does not support copy-on-write, then a fallback copy mechanism is used.
+         */
+        const COPYFILE_FICLONE: number;
+        /**
+         * Constant for fs.copyFile. Copy operation will attempt to create a copy-on-write reflink.
+         * If the underlying platform does not support copy-on-write, then the operation will fail with an error.
+         */
+        const COPYFILE_FICLONE_FORCE: number;
+        // File Open Constants
+        /** Constant for fs.open(). Flag indicating to open a file for read-only access. */
+        const O_RDONLY: number;
+        /** Constant for fs.open(). Flag indicating to open a file for write-only access. */
+        const O_WRONLY: number;
+        /** Constant for fs.open(). Flag indicating to open a file for read-write access. */
+        const O_RDWR: number;
+        /** Constant for fs.open(). Flag indicating to create the file if it does not already exist. */
+        const O_CREAT: number;
+        /** Constant for fs.open(). Flag indicating that opening a file should fail if the O_CREAT flag is set and the file already exists. */
+        const O_EXCL: number;
+        /**
+         * Constant for fs.open(). Flag indicating that if path identifies a terminal device,
+         * opening the path shall not cause that terminal to become the controlling terminal for the process
+         * (if the process does not already have one).
+         */
+        const O_NOCTTY: number;
+        /** Constant for fs.open(). Flag indicating that if the file exists and is a regular file, and the file is opened successfully for write access, its length shall be truncated to zero. */
+        const O_TRUNC: number;
+        /** Constant for fs.open(). Flag indicating that data will be appended to the end of the file. */
+        const O_APPEND: number;
+        /** Constant for fs.open(). Flag indicating that the open should fail if the path is not a directory. */
+        const O_DIRECTORY: number;
+        /**
+         * constant for fs.open().
+         * Flag indicating reading accesses to the file system will no longer result in
+         * an update to the atime information associated with the file.
+         * This flag is available on Linux operating systems only.
+         */
+        const O_NOATIME: number;
+        /** Constant for fs.open(). Flag indicating that the open should fail if the path is a symbolic link. */
+        const O_NOFOLLOW: number;
+        /** Constant for fs.open(). Flag indicating that the file is opened for synchronous I/O. */
+        const O_SYNC: number;
+        /** Constant for fs.open(). Flag indicating that the file is opened for synchronous I/O with write operations waiting for data integrity. */
+        const O_DSYNC: number;
+        /** Constant for fs.open(). Flag indicating to open the symbolic link itself rather than the resource it is pointing to. */
+        const O_SYMLINK: number;
+        /** Constant for fs.open(). When set, an attempt will be made to minimize caching effects of file I/O. */
+        const O_DIRECT: number;
+        /** Constant for fs.open(). Flag indicating to open the file in nonblocking mode when possible. */
+        const O_NONBLOCK: number;
+        // File Type Constants
+        /** Constant for fs.Stats mode property for determining a file's type. Bit mask used to extract the file type code. */
+        const S_IFMT: number;
+        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a regular file. */
+        const S_IFREG: number;
+        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a directory. */
+        const S_IFDIR: number;
+        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a character-oriented device file. */
+        const S_IFCHR: number;
+        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a block-oriented device file. */
+        const S_IFBLK: number;
+        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a FIFO/pipe. */
+        const S_IFIFO: number;
+        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a symbolic link. */
+        const S_IFLNK: number;
+        /** Constant for fs.Stats mode property for determining a file's type. File type constant for a socket. */
+        const S_IFSOCK: number;
+        // File Mode Constants
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by owner. */
+        const S_IRWXU: number;
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by owner. */
+        const S_IRUSR: number;
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating writable by owner. */
+        const S_IWUSR: number;
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by owner. */
+        const S_IXUSR: number;
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by group. */
+        const S_IRWXG: number;
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by group. */
+        const S_IRGRP: number;
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating writable by group. */
+        const S_IWGRP: number;
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by group. */
+        const S_IXGRP: number;
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable, writable and executable by others. */
+        const S_IRWXO: number;
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating readable by others. */
+        const S_IROTH: number;
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating writable by others. */
+        const S_IWOTH: number;
+        /** Constant for fs.Stats mode property for determining access permissions for a file. File mode indicating executable by others. */
+        const S_IXOTH: number;
+        /**
+         * When set, a memory file mapping is used to access the file. This flag
+         * is available on Windows operating systems only. On other operating systems,
+         * this flag is ignored.
+         */
+        const UV_FS_O_FILEMAP: number;
+    }
+    /**
+     * Tests a user's permissions for the file or directory specified by `path`.
+     * The `mode` argument is an optional integer that specifies the accessibility
+     * checks to be performed. `mode` should be either the value `fs.constants.F_OK` or a mask consisting of the bitwise OR of any of `fs.constants.R_OK`, `fs.constants.W_OK`, and `fs.constants.X_OK`
+     * (e.g.`fs.constants.W_OK | fs.constants.R_OK`). Check `File access constants` for
+     * possible values of `mode`.
+     *
+     * The final argument, `callback`, is a callback function that is invoked with
+     * a possible error argument. If any of the accessibility checks fail, the error
+     * argument will be an `Error` object. The following examples check if `package.json` exists, and if it is readable or writable.
+     *
+     * ```js
+     * import { access, constants } from 'node:fs';
+     *
+     * const file = 'package.json';
+     *
+     * // Check if the file exists in the current directory.
+     * access(file, constants.F_OK, (err) => {
+     *   console.log(`${file} ${err ? 'does not exist' : 'exists'}`);
+     * });
+     *
+     * // Check if the file is readable.
+     * access(file, constants.R_OK, (err) => {
+     *   console.log(`${file} ${err ? 'is not readable' : 'is readable'}`);
+     * });
+     *
+     * // Check if the file is writable.
+     * access(file, constants.W_OK, (err) => {
+     *   console.log(`${file} ${err ? 'is not writable' : 'is writable'}`);
+     * });
+     *
+     * // Check if the file is readable and writable.
+     * access(file, constants.R_OK | constants.W_OK, (err) => {
+     *   console.log(`${file} ${err ? 'is not' : 'is'} readable and writable`);
+     * });
+     * ```
+     *
+     * Do not use `fs.access()` to check for the accessibility of a file before calling `fs.open()`, `fs.readFile()`, or `fs.writeFile()`. Doing
+     * so introduces a race condition, since other processes may change the file's
+     * state between the two calls. Instead, user code should open/read/write the
+     * file directly and handle the error raised if the file is not accessible.
+     *
+     * **write (NOT RECOMMENDED)**
+     *
+     * ```js
+     * import { access, open, close } from 'node:fs';
+     *
+     * access('myfile', (err) => {
+     *   if (!err) {
+     *     console.error('myfile already exists');
+     *     return;
+     *   }
+     *
+     *   open('myfile', 'wx', (err, fd) => {
+     *     if (err) throw err;
+     *
+     *     try {
+     *       writeMyData(fd);
+     *     } finally {
+     *       close(fd, (err) => {
+     *         if (err) throw err;
+     *       });
+     *     }
+     *   });
+     * });
+     * ```
+     *
+     * **write (RECOMMENDED)**
+     *
+     * ```js
+     * import { open, close } from 'node:fs';
+     *
+     * open('myfile', 'wx', (err, fd) => {
+     *   if (err) {
+     *     if (err.code === 'EEXIST') {
+     *       console.error('myfile already exists');
+     *       return;
+     *     }
+     *
+     *     throw err;
+     *   }
+     *
+     *   try {
+     *     writeMyData(fd);
+     *   } finally {
+     *     close(fd, (err) => {
+     *       if (err) throw err;
+     *     });
+     *   }
+     * });
+     * ```
+     *
+     * **read (NOT RECOMMENDED)**
+     *
+     * ```js
+     * import { access, open, close } from 'node:fs';
+     * access('myfile', (err) => {
+     *   if (err) {
+     *     if (err.code === 'ENOENT') {
+     *       console.error('myfile does not exist');
+     *       return;
+     *     }
+     *
+     *     throw err;
+     *   }
+     *
+     *   open('myfile', 'r', (err, fd) => {
+     *     if (err) throw err;
+     *
+     *     try {
+     *       readMyData(fd);
+     *     } finally {
+     *       close(fd, (err) => {
+     *         if (err) throw err;
+     *       });
+     *     }
+     *   });
+     * });
+     * ```
+     *
+     * **read (RECOMMENDED)**
+     *
+     * ```js
+     * import { open, close } from 'node:fs';
+     *
+     * open('myfile', 'r', (err, fd) => {
+     *   if (err) {
+     *     if (err.code === 'ENOENT') {
+     *       console.error('myfile does not exist');
+     *       return;
+     *     }
+     *
+     *     throw err;
+     *   }
+     *
+     *   try {
+     *     readMyData(fd);
+     *   } finally {
+     *     close(fd, (err) => {
+     *       if (err) throw err;
+     *     });
+     *   }
+     * });
+     * ```
+     *
+     * The "not recommended" examples above check for accessibility and then use the
+     * file; the "recommended" examples are better because they use the file directly
+     * and handle the error, if any.
+     *
+     * In general, check for the accessibility of a file only if the file will not be
+     * used directly, for example when its accessibility is a signal from another
+     * process.
+     *
+     * On Windows, access-control policies (ACLs) on a directory may limit access to
+     * a file or directory. The `fs.access()` function, however, does not check the
+     * ACL and therefore may report that a path is accessible even if the ACL restricts
+     * the user from reading or writing to it.
+     * @since v0.11.15
+     * @param [mode=fs.constants.F_OK]
+     */
+    function access(path: PathLike, mode: number | undefined, callback: NoParamCallback): void;
+    /**
+     * Asynchronously tests a user's permissions for the file specified by path.
+     * @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
+     */
+    function access(path: PathLike, callback: NoParamCallback): void;
+    namespace access {
+        /**
+         * Asynchronously tests a user's permissions for the file specified by path.
+         * @param path A path to a file or directory. If a URL is provided, it must use the `file:` protocol.
+         * URL support is _experimental_.
+         */
+        function __promisify__(path: PathLike, mode?: number): Promise<void>;
+    }
+    /**
+     * Synchronously tests a user's permissions for the file or directory specified
+     * by `path`. The `mode` argument is an optional integer that specifies the
+     * accessibility checks to be performed. `mode` should be either the value `fs.constants.F_OK` or a mask consisting of the bitwise OR of any of `fs.constants.R_OK`, `fs.constants.W_OK`, and
+     * `fs.constants.X_OK` (e.g.`fs.constants.W_OK | fs.constants.R_OK`). Check `File access constants` for
+     * possible values of `mode`.
+     *
+     * If any of the accessibility checks fail, an `Error` will be thrown. Otherwise,
+     * the method will return `undefined`.
+     *
+     * ```js
+     * import { accessSync, constants } from 'node:fs';
+     *
+     * try {
+     *   accessSync('etc/passwd', constants.R_OK | constants.W_OK);
+     *   console.log('can read/write');
+     * } catch (err) {
+     *   console.error('no access!');
+     * }
+     * ```
+     * @since v0.11.15
+     * @param [mode=fs.constants.F_OK]
+     */
+    function accessSync(path: PathLike, mode?: number): void;
+    interface StreamOptions {
+        flags?: string | undefined;
+        encoding?: BufferEncoding | undefined;
+        fd?: number | FileHandle | undefined;
+        mode?: number | undefined;
+        autoClose?: boolean | undefined;
+        emitClose?: boolean | undefined;
+        start?: number | undefined;
+        signal?: AbortSignal | null | undefined;
+        highWaterMark?: number | undefined;
+    }
+    interface FSImplementation {
+        open?: (...args: any[]) => any;
+        close?: (...args: any[]) => any;
+    }
+    interface CreateReadStreamFSImplementation extends FSImplementation {
+        read: (...args: any[]) => any;
+    }
+    interface CreateWriteStreamFSImplementation extends FSImplementation {
+        write: (...args: any[]) => any;
+        writev?: (...args: any[]) => any;
+    }
+    interface ReadStreamOptions extends StreamOptions {
+        fs?: CreateReadStreamFSImplementation | null | undefined;
+        end?: number | undefined;
+    }
+    interface WriteStreamOptions extends StreamOptions {
+        fs?: CreateWriteStreamFSImplementation | null | undefined;
+        flush?: boolean | undefined;
+    }
+    /**
+     * `options` can include `start` and `end` values to read a range of bytes from
+     * the file instead of the entire file. Both `start` and `end` are inclusive and
+     * start counting at 0, allowed values are in the
+     * \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. If `fd` is specified and `start` is
+     * omitted or `undefined`, `fs.createReadStream()` reads sequentially from the
+     * current file position. The `encoding` can be any one of those accepted by `Buffer`.
+     *
+     * If `fd` is specified, `ReadStream` will ignore the `path` argument and will use
+     * the specified file descriptor. This means that no `'open'` event will be
+     * emitted. `fd` should be blocking; non-blocking `fd`s should be passed to `net.Socket`.
+     *
+     * If `fd` points to a character device that only supports blocking reads
+     * (such as keyboard or sound card), read operations do not finish until data is
+     * available. This can prevent the process from exiting and the stream from
+     * closing naturally.
+     *
+     * By default, the stream will emit a `'close'` event after it has been
+     * destroyed.  Set the `emitClose` option to `false` to change this behavior.
+     *
+     * By providing the `fs` option, it is possible to override the corresponding `fs` implementations for `open`, `read`, and `close`. When providing the `fs` option,
+     * an override for `read` is required. If no `fd` is provided, an override for `open` is also required. If `autoClose` is `true`, an override for `close` is
+     * also required.
+     *
+     * ```js
+     * import { createReadStream } from 'node:fs';
+     *
+     * // Create a stream from some character device.
+     * const stream = createReadStream('/dev/input/event0');
+     * setTimeout(() => {
+     *   stream.close(); // This may not close the stream.
+     *   // Artificially marking end-of-stream, as if the underlying resource had
+     *   // indicated end-of-file by itself, allows the stream to close.
+     *   // This does not cancel pending read operations, and if there is such an
+     *   // operation, the process may still not be able to exit successfully
+     *   // until it finishes.
+     *   stream.push(null);
+     *   stream.read(0);
+     * }, 100);
+     * ```
+     *
+     * If `autoClose` is false, then the file descriptor won't be closed, even if
+     * there's an error. It is the application's responsibility to close it and make
+     * sure there's no file descriptor leak. If `autoClose` is set to true (default
+     * behavior), on `'error'` or `'end'` the file descriptor will be closed
+     * automatically.
+     *
+     * `mode` sets the file mode (permission and sticky bits), but only if the
+     * file was created.
+     *
+     * An example to read the last 10 bytes of a file which is 100 bytes long:
+     *
+     * ```js
+     * import { createReadStream } from 'node:fs';
+     *
+     * createReadStream('sample.txt', { start: 90, end: 99 });
+     * ```
+     *
+     * If `options` is a string, then it specifies the encoding.
+     * @since v0.1.31
+     */
+    function createReadStream(path: PathLike, options?: BufferEncoding | ReadStreamOptions): ReadStream;
+    /**
+     * `options` may also include a `start` option to allow writing data at some
+     * position past the beginning of the file, allowed values are in the
+     * \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. Modifying a file rather than
+     * replacing it may require the `flags` option to be set to `r+` rather than the
+     * default `w`. The `encoding` can be any one of those accepted by `Buffer`.
+     *
+     * If `autoClose` is set to true (default behavior) on `'error'` or `'finish'` the file descriptor will be closed automatically. If `autoClose` is false,
+     * then the file descriptor won't be closed, even if there's an error.
+     * It is the application's responsibility to close it and make sure there's no
+     * file descriptor leak.
+     *
+     * By default, the stream will emit a `'close'` event after it has been
+     * destroyed.  Set the `emitClose` option to `false` to change this behavior.
+     *
+     * By providing the `fs` option it is possible to override the corresponding `fs` implementations for `open`, `write`, `writev`, and `close`. Overriding `write()` without `writev()` can reduce
+     * performance as some optimizations (`_writev()`)
+     * will be disabled. When providing the `fs` option, overrides for at least one of `write` and `writev` are required. If no `fd` option is supplied, an override
+     * for `open` is also required. If `autoClose` is `true`, an override for `close` is also required.
+     *
+     * Like `fs.ReadStream`, if `fd` is specified, `fs.WriteStream` will ignore the `path` argument and will use the specified file descriptor. This means that no `'open'` event will be
+     * emitted. `fd` should be blocking; non-blocking `fd`s
+     * should be passed to `net.Socket`.
+     *
+     * If `options` is a string, then it specifies the encoding.
+     * @since v0.1.31
+     */
+    function createWriteStream(path: PathLike, options?: BufferEncoding | WriteStreamOptions): WriteStream;
+    /**
+     * Forces all currently queued I/O operations associated with the file to the
+     * operating system's synchronized I/O completion state. Refer to the POSIX [`fdatasync(2)`](http://man7.org/linux/man-pages/man2/fdatasync.2.html) documentation for details. No arguments other
+     * than a possible
+     * exception are given to the completion callback.
+     * @since v0.1.96
+     */
+    function fdatasync(fd: number, callback: NoParamCallback): void;
+    namespace fdatasync {
+        /**
+         * Asynchronous fdatasync(2) - synchronize a file's in-core state with storage device.
+         * @param fd A file descriptor.
+         */
+        function __promisify__(fd: number): Promise<void>;
+    }
+    /**
+     * Forces all currently queued I/O operations associated with the file to the
+     * operating system's synchronized I/O completion state. Refer to the POSIX [`fdatasync(2)`](http://man7.org/linux/man-pages/man2/fdatasync.2.html) documentation for details. Returns `undefined`.
+     * @since v0.1.96
+     */
+    function fdatasyncSync(fd: number): void;
+    /**
+     * Asynchronously copies `src` to `dest`. By default, `dest` is overwritten if it
+     * already exists. No arguments other than a possible exception are given to the
+     * callback function. Node.js makes no guarantees about the atomicity of the copy
+     * operation. If an error occurs after the destination file has been opened for
+     * writing, Node.js will attempt to remove the destination.
+     *
+     * `mode` is an optional integer that specifies the behavior
+     * of the copy operation. It is possible to create a mask consisting of the bitwise
+     * OR of two or more values (e.g.`fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE`).
+     *
+     * * `fs.constants.COPYFILE_EXCL`: The copy operation will fail if `dest` already
+     * exists.
+     * * `fs.constants.COPYFILE_FICLONE`: The copy operation will attempt to create a
+     * copy-on-write reflink. If the platform does not support copy-on-write, then a
+     * fallback copy mechanism is used.
+     * * `fs.constants.COPYFILE_FICLONE_FORCE`: The copy operation will attempt to
+     * create a copy-on-write reflink. If the platform does not support
+     * copy-on-write, then the operation will fail.
+     *
+     * ```js
+     * import { copyFile, constants } from 'node:fs';
+     *
+     * function callback(err) {
+     *   if (err) throw err;
+     *   console.log('source.txt was copied to destination.txt');
+     * }
+     *
+     * // destination.txt will be created or overwritten by default.
+     * copyFile('source.txt', 'destination.txt', callback);
+     *
+     * // By using COPYFILE_EXCL, the operation will fail if destination.txt exists.
+     * copyFile('source.txt', 'destination.txt', constants.COPYFILE_EXCL, callback);
+     * ```
+     * @since v8.5.0
+     * @param src source filename to copy
+     * @param dest destination filename of the copy operation
+     * @param [mode=0] modifiers for copy operation.
+     */
+    function copyFile(src: PathLike, dest: PathLike, callback: NoParamCallback): void;
+    function copyFile(src: PathLike, dest: PathLike, mode: number, callback: NoParamCallback): void;
+    namespace copyFile {
+        function __promisify__(src: PathLike, dst: PathLike, mode?: number): Promise<void>;
+    }
+    /**
+     * Synchronously copies `src` to `dest`. By default, `dest` is overwritten if it
+     * already exists. Returns `undefined`. Node.js makes no guarantees about the
+     * atomicity of the copy operation. If an error occurs after the destination file
+     * has been opened for writing, Node.js will attempt to remove the destination.
+     *
+     * `mode` is an optional integer that specifies the behavior
+     * of the copy operation. It is possible to create a mask consisting of the bitwise
+     * OR of two or more values (e.g.`fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE`).
+     *
+     * * `fs.constants.COPYFILE_EXCL`: The copy operation will fail if `dest` already
+     * exists.
+     * * `fs.constants.COPYFILE_FICLONE`: The copy operation will attempt to create a
+     * copy-on-write reflink. If the platform does not support copy-on-write, then a
+     * fallback copy mechanism is used.
+     * * `fs.constants.COPYFILE_FICLONE_FORCE`: The copy operation will attempt to
+     * create a copy-on-write reflink. If the platform does not support
+     * copy-on-write, then the operation will fail.
+     *
+     * ```js
+     * import { copyFileSync, constants } from 'node:fs';
+     *
+     * // destination.txt will be created or overwritten by default.
+     * copyFileSync('source.txt', 'destination.txt');
+     * console.log('source.txt was copied to destination.txt');
+     *
+     * // By using COPYFILE_EXCL, the operation will fail if destination.txt exists.
+     * copyFileSync('source.txt', 'destination.txt', constants.COPYFILE_EXCL);
+     * ```
+     * @since v8.5.0
+     * @param src source filename to copy
+     * @param dest destination filename of the copy operation
+     * @param [mode=0] modifiers for copy operation.
+     */
+    function copyFileSync(src: PathLike, dest: PathLike, mode?: number): void;
+    /**
+     * Write an array of `ArrayBufferView`s to the file specified by `fd` using `writev()`.
+     *
+     * `position` is the offset from the beginning of the file where this data
+     * should be written. If `typeof position !== 'number'`, the data will be written
+     * at the current position.
+     *
+     * The callback will be given three arguments: `err`, `bytesWritten`, and `buffers`. `bytesWritten` is how many bytes were written from `buffers`.
+     *
+     * If this method is `util.promisify()` ed, it returns a promise for an `Object` with `bytesWritten` and `buffers` properties.
+     *
+     * It is unsafe to use `fs.writev()` multiple times on the same file without
+     * waiting for the callback. For this scenario, use {@link createWriteStream}.
+     *
+     * On Linux, positional writes don't work when the file is opened in append mode.
+     * The kernel ignores the position argument and always appends the data to
+     * the end of the file.
+     * @since v12.9.0
+     * @param [position='null']
+     */
+    function writev<TBuffers extends readonly NodeJS.ArrayBufferView[]>(
+        fd: number,
+        buffers: TBuffers,
+        cb: (err: NodeJS.ErrnoException | null, bytesWritten: number, buffers: TBuffers) => void,
+    ): void;
+    function writev<TBuffers extends readonly NodeJS.ArrayBufferView[]>(
+        fd: number,
+        buffers: TBuffers,
+        position: number | null,
+        cb: (err: NodeJS.ErrnoException | null, bytesWritten: number, buffers: TBuffers) => void,
+    ): void;
+    // Providing a default type parameter doesn't provide true BC for userland consumers, but at least suppresses TS2314
+    // TODO: remove default in future major version
+    interface WriteVResult<T extends readonly NodeJS.ArrayBufferView[] = NodeJS.ArrayBufferView[]> {
+        bytesWritten: number;
+        buffers: T;
+    }
+    namespace writev {
+        function __promisify__<TBuffers extends readonly NodeJS.ArrayBufferView[]>(
+            fd: number,
+            buffers: TBuffers,
+            position?: number,
+        ): Promise<WriteVResult<TBuffers>>;
+    }
+    /**
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link writev}.
+     * @since v12.9.0
+     * @param [position='null']
+     * @return The number of bytes written.
+     */
+    function writevSync(fd: number, buffers: readonly NodeJS.ArrayBufferView[], position?: number): number;
+    /**
+     * Read from a file specified by `fd` and write to an array of `ArrayBufferView`s
+     * using `readv()`.
+     *
+     * `position` is the offset from the beginning of the file from where data
+     * should be read. If `typeof position !== 'number'`, the data will be read
+     * from the current position.
+     *
+     * The callback will be given three arguments: `err`, `bytesRead`, and `buffers`. `bytesRead` is how many bytes were read from the file.
+     *
+     * If this method is invoked as its `util.promisify()` ed version, it returns
+     * a promise for an `Object` with `bytesRead` and `buffers` properties.
+     * @since v13.13.0, v12.17.0
+     * @param [position='null']
+     */
+    function readv<TBuffers extends readonly NodeJS.ArrayBufferView[]>(
+        fd: number,
+        buffers: TBuffers,
+        cb: (err: NodeJS.ErrnoException | null, bytesRead: number, buffers: TBuffers) => void,
+    ): void;
+    function readv<TBuffers extends readonly NodeJS.ArrayBufferView[]>(
+        fd: number,
+        buffers: TBuffers,
+        position: number | null,
+        cb: (err: NodeJS.ErrnoException | null, bytesRead: number, buffers: TBuffers) => void,
+    ): void;
+    // Providing a default type parameter doesn't provide true BC for userland consumers, but at least suppresses TS2314
+    // TODO: remove default in future major version
+    interface ReadVResult<T extends readonly NodeJS.ArrayBufferView[] = NodeJS.ArrayBufferView[]> {
+        bytesRead: number;
+        buffers: T;
+    }
+    namespace readv {
+        function __promisify__<TBuffers extends readonly NodeJS.ArrayBufferView[]>(
+            fd: number,
+            buffers: TBuffers,
+            position?: number,
+        ): Promise<ReadVResult<TBuffers>>;
+    }
+    /**
+     * For detailed information, see the documentation of the asynchronous version of
+     * this API: {@link readv}.
+     * @since v13.13.0, v12.17.0
+     * @param [position='null']
+     * @return The number of bytes read.
+     */
+    function readvSync(fd: number, buffers: readonly NodeJS.ArrayBufferView[], position?: number): number;
+
+    interface OpenAsBlobOptions {
+        /**
+         * An optional mime type for the blob.
+         *
+         * @default 'undefined'
+         */
+        type?: string | undefined;
+    }
+
+    /**
+     * Returns a `Blob` whose data is backed by the given file.
+     *
+     * The file must not be modified after the `Blob` is created. Any modifications
+     * will cause reading the `Blob` data to fail with a `DOMException` error.
+     * Synchronous stat operations on the file when the `Blob` is created, and before
+     * each read in order to detect whether the file data has been modified on disk.
+     *
+     * ```js
+     * import { openAsBlob } from 'node:fs';
+     *
+     * const blob = await openAsBlob('the.file.txt');
+     * const ab = await blob.arrayBuffer();
+     * blob.stream();
+     * ```
+     * @since v19.8.0
+     */
+    function openAsBlob(path: PathLike, options?: OpenAsBlobOptions): Promise<Blob>;
+
+    interface OpenDirOptions {
+        /**
+         * @default 'utf8'
+         */
+        encoding?: BufferEncoding | undefined;
+        /**
+         * Number of directory entries that are buffered
+         * internally when reading from the directory. Higher values lead to better
+         * performance but higher memory usage.
+         * @default 32
+         */
+        bufferSize?: number | undefined;
+        /**
+         * @default false
+         */
+        recursive?: boolean | undefined;
+    }
+    /**
+     * Synchronously open a directory. See [`opendir(3)`](http://man7.org/linux/man-pages/man3/opendir.3.html).
+     *
+     * Creates an `fs.Dir`, which contains all further functions for reading from
+     * and cleaning up the directory.
+     *
+     * The `encoding` option sets the encoding for the `path` while opening the
+     * directory and subsequent read operations.
+     * @since v12.12.0
+     */
+    function opendirSync(path: PathLike, options?: OpenDirOptions): Dir;
+    /**
+     * Asynchronously open a directory. See the POSIX [`opendir(3)`](http://man7.org/linux/man-pages/man3/opendir.3.html) documentation for
+     * more details.
+     *
+     * Creates an `fs.Dir`, which contains all further functions for reading from
+     * and cleaning up the directory.
+     *
+     * The `encoding` option sets the encoding for the `path` while opening the
+     * directory and subsequent read operations.
+     * @since v12.12.0
+     */
+    function opendir(path: PathLike, cb: (err: NodeJS.ErrnoException | null, dir: Dir) => void): void;
+    function opendir(
+        path: PathLike,
+        options: OpenDirOptions,
+        cb: (err: NodeJS.ErrnoException | null, dir: Dir) => void,
+    ): void;
+    namespace opendir {
+        function __promisify__(path: PathLike, options?: OpenDirOptions): Promise<Dir>;
+    }
+    interface BigIntStats extends StatsBase<bigint> {
+        atimeNs: bigint;
+        mtimeNs: bigint;
+        ctimeNs: bigint;
+        birthtimeNs: bigint;
+    }
+    interface BigIntOptions {
+        bigint: true;
+    }
+    interface StatOptions {
+        bigint?: boolean | undefined;
+    }
+    interface StatSyncOptions extends StatOptions {
+        throwIfNoEntry?: boolean | undefined;
+    }
+    interface CopyOptionsBase {
+        /**
+         * Dereference symlinks
+         * @default false
+         */
+        dereference?: boolean | undefined;
+        /**
+         * When `force` is `false`, and the destination
+         * exists, throw an error.
+         * @default false
+         */
+        errorOnExist?: boolean | undefined;
+        /**
+         * Overwrite existing file or directory. _The copy
+         * operation will ignore errors if you set this to false and the destination
+         * exists. Use the `errorOnExist` option to change this behavior.
+         * @default true
+         */
+        force?: boolean | undefined;
+        /**
+         * Modifiers for copy operation. See `mode` flag of {@link copyFileSync()}
+         */
+        mode?: number | undefined;
+        /**
+         * When `true` timestamps from `src` will
+         * be preserved.
+         * @default false
+         */
+        preserveTimestamps?: boolean | undefined;
+        /**
+         * Copy directories recursively.
+         * @default false
+         */
+        recursive?: boolean | undefined;
+        /**
+         * When true, path resolution for symlinks will be skipped
+         * @default false
+         */
+        verbatimSymlinks?: boolean | undefined;
+    }
+    interface CopyOptions extends CopyOptionsBase {
+        /**
+         * Function to filter copied files/directories. Return
+         * `true` to copy the item, `false` to ignore it.
+         */
+        filter?: ((source: string, destination: string) => boolean | Promise<boolean>) | undefined;
+    }
+    interface CopySyncOptions extends CopyOptionsBase {
+        /**
+         * Function to filter copied files/directories. Return
+         * `true` to copy the item, `false` to ignore it.
+         */
+        filter?: ((source: string, destination: string) => boolean) | undefined;
+    }
+    /**
+     * Asynchronously copies the entire directory structure from `src` to `dest`,
+     * including subdirectories and files.
+     *
+     * When copying a directory to another directory, globs are not supported and
+     * behavior is similar to `cp dir1/ dir2/`.
+     * @since v16.7.0
+     * @experimental
+     * @param src source path to copy.
+     * @param dest destination path to copy to.
+     */
+    function cp(
+        source: string | URL,
+        destination: string | URL,
+        callback: (err: NodeJS.ErrnoException | null) => void,
+    ): void;
+    function cp(
+        source: string | URL,
+        destination: string | URL,
+        opts: CopyOptions,
+        callback: (err: NodeJS.ErrnoException | null) => void,
+    ): void;
+    /**
+     * Synchronously copies the entire directory structure from `src` to `dest`,
+     * including subdirectories and files.
+     *
+     * When copying a directory to another directory, globs are not supported and
+     * behavior is similar to `cp dir1/ dir2/`.
+     * @since v16.7.0
+     * @experimental
+     * @param src source path to copy.
+     * @param dest destination path to copy to.
+     */
+    function cpSync(source: string | URL, destination: string | URL, opts?: CopySyncOptions): void;
+
+    // TODO: collapse
+    interface _GlobOptions<T extends Dirent | string> {
+        /**
+         * Current working directory.
+         * @default process.cwd()
+         */
+        cwd?: string | URL | undefined;
+        /**
+         * `true` if the glob should return paths as `Dirent`s, `false` otherwise.
+         * @default false
+         * @since v22.2.0
+         */
+        withFileTypes?: boolean | undefined;
+        /**
+         * Function to filter out files/directories or a
+         * list of glob patterns to be excluded. If a function is provided, return
+         * `true` to exclude the item, `false` to include it.
+         * If a string array is provided, each string should be a glob pattern that
+         * specifies paths to exclude. Note: Negation patterns (e.g., '!foo.js') are
+         * not supported.
+         * @default undefined
+         */
+        exclude?: ((fileName: T) => boolean) | readonly string[] | undefined;
+    }
+    interface GlobOptions extends _GlobOptions<Dirent | string> {}
+    interface GlobOptionsWithFileTypes extends _GlobOptions<Dirent> {
+        withFileTypes: true;
+    }
+    interface GlobOptionsWithoutFileTypes extends _GlobOptions<string> {
+        withFileTypes?: false | undefined;
+    }
+
+    /**
+     * Retrieves the files matching the specified pattern.
+     *
+     * ```js
+     * import { glob } from 'node:fs';
+     *
+     * glob('*.js', (err, matches) => {
+     *   if (err) throw err;
+     *   console.log(matches);
+     * });
+     * ```
+     * @since v22.0.0
+     */
+    function glob(
+        pattern: string | readonly string[],
+        callback: (err: NodeJS.ErrnoException | null, matches: string[]) => void,
+    ): void;
+    function glob(
+        pattern: string | readonly string[],
+        options: GlobOptionsWithFileTypes,
+        callback: (
+            err: NodeJS.ErrnoException | null,
+            matches: Dirent[],
+        ) => void,
+    ): void;
+    function glob(
+        pattern: string | readonly string[],
+        options: GlobOptionsWithoutFileTypes,
+        callback: (
+            err: NodeJS.ErrnoException | null,
+            matches: string[],
+        ) => void,
+    ): void;
+    function glob(
+        pattern: string | readonly string[],
+        options: GlobOptions,
+        callback: (
+            err: NodeJS.ErrnoException | null,
+            matches: Dirent[] | string[],
+        ) => void,
+    ): void;
+    /**
+     * ```js
+     * import { globSync } from 'node:fs';
+     *
+     * console.log(globSync('*.js'));
+     * ```
+     * @since v22.0.0
+     * @returns paths of files that match the pattern.
+     */
+    function globSync(pattern: string | readonly string[]): string[];
+    function globSync(
+        pattern: string | readonly string[],
+        options: GlobOptionsWithFileTypes,
+    ): Dirent[];
+    function globSync(
+        pattern: string | readonly string[],
+        options: GlobOptionsWithoutFileTypes,
+    ): string[];
+    function globSync(
+        pattern: string | readonly string[],
+        options: GlobOptions,
+    ): Dirent[] | string[];
+}
+declare module "node:fs" {
+    export * as promises from "node:fs/promises";
+}
+declare module "fs" {
+    export * from "node:fs";
+}
diff --git a/mqtt-backend/node_modules/@types/node/fs/promises.d.ts b/mqtt-backend/node_modules/@types/node/fs/promises.d.ts
new file mode 100644
index 0000000..419112a
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/fs/promises.d.ts
@@ -0,0 +1,1319 @@
+declare module "node:fs/promises" {
+    import { NonSharedBuffer } from "node:buffer";
+    import { Abortable } from "node:events";
+    import { Interface as ReadlineInterface } from "node:readline";
+    import {
+        BigIntStats,
+        BigIntStatsFs,
+        BufferEncodingOption,
+        constants as fsConstants,
+        CopyOptions,
+        Dir,
+        Dirent,
+        EncodingOption,
+        GlobOptions,
+        GlobOptionsWithFileTypes,
+        GlobOptionsWithoutFileTypes,
+        MakeDirectoryOptions,
+        Mode,
+        ObjectEncodingOptions,
+        OpenDirOptions,
+        OpenMode,
+        PathLike,
+        ReadOptions,
+        ReadOptionsWithBuffer,
+        ReadPosition,
+        ReadStream,
+        ReadVResult,
+        RmOptions,
+        StatFsOptions,
+        StatOptions,
+        Stats,
+        StatsFs,
+        TimeLike,
+        WatchEventType,
+        WatchOptions as _WatchOptions,
+        WriteStream,
+        WriteVResult,
+    } from "node:fs";
+    import { Stream } from "node:stream";
+    import { ReadableStream } from "node:stream/web";
+    interface FileChangeInfo<T extends string | Buffer> {
+        eventType: WatchEventType;
+        filename: T | null;
+    }
+    interface FlagAndOpenMode {
+        mode?: Mode | undefined;
+        flag?: OpenMode | undefined;
+    }
+    interface FileReadResult<T extends NodeJS.ArrayBufferView> {
+        bytesRead: number;
+        buffer: T;
+    }
+    /** @deprecated This interface will be removed in a future version. Use `import { ReadOptionsWithBuffer } from "node:fs"` instead. */
+    interface FileReadOptions<T extends NodeJS.ArrayBufferView = Buffer> {
+        /**
+         * @default `Buffer.alloc(0xffff)`
+         */
+        buffer?: T;
+        /**
+         * @default 0
+         */
+        offset?: number | null;
+        /**
+         * @default `buffer.byteLength`
+         */
+        length?: number | null;
+        position?: ReadPosition | null;
+    }
+    interface CreateReadStreamOptions extends Abortable {
+        encoding?: BufferEncoding | null | undefined;
+        autoClose?: boolean | undefined;
+        emitClose?: boolean | undefined;
+        start?: number | undefined;
+        end?: number | undefined;
+        highWaterMark?: number | undefined;
+    }
+    interface CreateWriteStreamOptions {
+        encoding?: BufferEncoding | null | undefined;
+        autoClose?: boolean | undefined;
+        emitClose?: boolean | undefined;
+        start?: number | undefined;
+        highWaterMark?: number | undefined;
+        flush?: boolean | undefined;
+    }
+    interface ReadableWebStreamOptions {
+        autoClose?: boolean | undefined;
+    }
+    // TODO: Add `EventEmitter` close
+    interface FileHandle {
+        /**
+         * The numeric file descriptor managed by the {FileHandle} object.
+         * @since v10.0.0
+         */
+        readonly fd: number;
+        /**
+         * Alias of `filehandle.writeFile()`.
+         *
+         * When operating on file handles, the mode cannot be changed from what it was set
+         * to with `fsPromises.open()`. Therefore, this is equivalent to `filehandle.writeFile()`.
+         * @since v10.0.0
+         * @return Fulfills with `undefined` upon success.
+         */
+        appendFile(
+            data: string | Uint8Array,
+            options?:
+                | (ObjectEncodingOptions & Abortable)
+                | BufferEncoding
+                | null,
+        ): Promise<void>;
+        /**
+         * Changes the ownership of the file. A wrapper for [`chown(2)`](http://man7.org/linux/man-pages/man2/chown.2.html).
+         * @since v10.0.0
+         * @param uid The file's new owner's user id.
+         * @param gid The file's new group's group id.
+         * @return Fulfills with `undefined` upon success.
+         */
+        chown(uid: number, gid: number): Promise<void>;
+        /**
+         * Modifies the permissions on the file. See [`chmod(2)`](http://man7.org/linux/man-pages/man2/chmod.2.html).
+         * @since v10.0.0
+         * @param mode the file mode bit mask.
+         * @return Fulfills with `undefined` upon success.
+         */
+        chmod(mode: Mode): Promise<void>;
+        /**
+         * Unlike the 16 KiB default `highWaterMark` for a `stream.Readable`, the stream
+         * returned by this method has a default `highWaterMark` of 64 KiB.
+         *
+         * `options` can include `start` and `end` values to read a range of bytes from
+         * the file instead of the entire file. Both `start` and `end` are inclusive and
+         * start counting at 0, allowed values are in the
+         * \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. If `start` is
+         * omitted or `undefined`, `filehandle.createReadStream()` reads sequentially from
+         * the current file position. The `encoding` can be any one of those accepted by `Buffer`.
+         *
+         * If the `FileHandle` points to a character device that only supports blocking
+         * reads (such as keyboard or sound card), read operations do not finish until data
+         * is available. This can prevent the process from exiting and the stream from
+         * closing naturally.
+         *
+         * By default, the stream will emit a `'close'` event after it has been
+         * destroyed.  Set the `emitClose` option to `false` to change this behavior.
+         *
+         * ```js
+         * import { open } from 'node:fs/promises';
+         *
+         * const fd = await open('/dev/input/event0');
+         * // Create a stream from some character device.
+         * const stream = fd.createReadStream();
+         * setTimeout(() => {
+         *   stream.close(); // This may not close the stream.
+         *   // Artificially marking end-of-stream, as if the underlying resource had
+         *   // indicated end-of-file by itself, allows the stream to close.
+         *   // This does not cancel pending read operations, and if there is such an
+         *   // operation, the process may still not be able to exit successfully
+         *   // until it finishes.
+         *   stream.push(null);
+         *   stream.read(0);
+         * }, 100);
+         * ```
+         *
+         * If `autoClose` is false, then the file descriptor won't be closed, even if
+         * there's an error. It is the application's responsibility to close it and make
+         * sure there's no file descriptor leak. If `autoClose` is set to true (default
+         * behavior), on `'error'` or `'end'` the file descriptor will be closed
+         * automatically.
+         *
+         * An example to read the last 10 bytes of a file which is 100 bytes long:
+         *
+         * ```js
+         * import { open } from 'node:fs/promises';
+         *
+         * const fd = await open('sample.txt');
+         * fd.createReadStream({ start: 90, end: 99 });
+         * ```
+         * @since v16.11.0
+         */
+        createReadStream(options?: CreateReadStreamOptions): ReadStream;
+        /**
+         * `options` may also include a `start` option to allow writing data at some
+         * position past the beginning of the file, allowed values are in the
+         * \[0, [`Number.MAX_SAFE_INTEGER`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/MAX_SAFE_INTEGER)\] range. Modifying a file rather than
+         * replacing it may require the `flags` `open` option to be set to `r+` rather than
+         * the default `r`. The `encoding` can be any one of those accepted by `Buffer`.
+         *
+         * If `autoClose` is set to true (default behavior) on `'error'` or `'finish'` the file descriptor will be closed automatically. If `autoClose` is false,
+         * then the file descriptor won't be closed, even if there's an error.
+         * It is the application's responsibility to close it and make sure there's no
+         * file descriptor leak.
+         *
+         * By default, the stream will emit a `'close'` event after it has been
+         * destroyed.  Set the `emitClose` option to `false` to change this behavior.
+         * @since v16.11.0
+         */
+        createWriteStream(options?: CreateWriteStreamOptions): WriteStream;
+        /**
+         * Forces all currently queued I/O operations associated with the file to the
+         * operating system's synchronized I/O completion state. Refer to the POSIX [`fdatasync(2)`](http://man7.org/linux/man-pages/man2/fdatasync.2.html) documentation for details.
+         *
+         * Unlike `filehandle.sync` this method does not flush modified metadata.
+         * @since v10.0.0
+         * @return Fulfills with `undefined` upon success.
+         */
+        datasync(): Promise<void>;
+        /**
+         * Request that all data for the open file descriptor is flushed to the storage
+         * device. The specific implementation is operating system and device specific.
+         * Refer to the POSIX [`fsync(2)`](http://man7.org/linux/man-pages/man2/fsync.2.html) documentation for more detail.
+         * @since v10.0.0
+         * @return Fulfills with `undefined` upon success.
+         */
+        sync(): Promise<void>;
+        /**
+         * Reads data from the file and stores that in the given buffer.
+         *
+         * If the file is not modified concurrently, the end-of-file is reached when the
+         * number of bytes read is zero.
+         * @since v10.0.0
+         * @param buffer A buffer that will be filled with the file data read.
+         * @param offset The location in the buffer at which to start filling.
+         * @param length The number of bytes to read.
+         * @param position The location where to begin reading data from the file. If `null`, data will be read from the current file position, and the position will be updated. If `position` is an
+         * integer, the current file position will remain unchanged.
+         * @return Fulfills upon success with an object with two properties:
+         */
+        read<T extends NodeJS.ArrayBufferView>(
+            buffer: T,
+            offset?: number | null,
+            length?: number | null,
+            position?: ReadPosition | null,
+        ): Promise<FileReadResult<T>>;
+        read<T extends NodeJS.ArrayBufferView>(
+            buffer: T,
+            options?: ReadOptions,
+        ): Promise<FileReadResult<T>>;
+        read<T extends NodeJS.ArrayBufferView = NonSharedBuffer>(
+            options?: ReadOptionsWithBuffer<T>,
+        ): Promise<FileReadResult<T>>;
+        /**
+         * Returns a byte-oriented `ReadableStream` that may be used to read the file's
+         * contents.
+         *
+         * An error will be thrown if this method is called more than once or is called
+         * after the `FileHandle` is closed or closing.
+         *
+         * ```js
+         * import {
+         *   open,
+         * } from 'node:fs/promises';
+         *
+         * const file = await open('./some/file/to/read');
+         *
+         * for await (const chunk of file.readableWebStream())
+         *   console.log(chunk);
+         *
+         * await file.close();
+         * ```
+         *
+         * While the `ReadableStream` will read the file to completion, it will not
+         * close the `FileHandle` automatically. User code must still call the`fileHandle.close()` method.
+         * @since v17.0.0
+         */
+        readableWebStream(options?: ReadableWebStreamOptions): ReadableStream;
+        /**
+         * Asynchronously reads the entire contents of a file.
+         *
+         * If `options` is a string, then it specifies the `encoding`.
+         *
+         * The `FileHandle` has to support reading.
+         *
+         * If one or more `filehandle.read()` calls are made on a file handle and then a `filehandle.readFile()` call is made, the data will be read from the current
+         * position till the end of the file. It doesn't always read from the beginning
+         * of the file.
+         * @since v10.0.0
+         * @return Fulfills upon a successful read with the contents of the file. If no encoding is specified (using `options.encoding`), the data is returned as a {Buffer} object. Otherwise, the
+         * data will be a string.
+         */
+        readFile(
+            options?:
+                | ({ encoding?: null | undefined } & Abortable)
+                | null,
+        ): Promise<NonSharedBuffer>;
+        /**
+         * Asynchronously reads the entire contents of a file. The underlying file will _not_ be closed automatically.
+         * The `FileHandle` must have been opened for reading.
+         */
+        readFile(
+            options:
+                | ({ encoding: BufferEncoding } & Abortable)
+                | BufferEncoding,
+        ): Promise<string>;
+        /**
+         * Asynchronously reads the entire contents of a file. The underlying file will _not_ be closed automatically.
+         * The `FileHandle` must have been opened for reading.
+         */
+        readFile(
+            options?:
+                | (ObjectEncodingOptions & Abortable)
+                | BufferEncoding
+                | null,
+        ): Promise<string | NonSharedBuffer>;
+        /**
+         * Convenience method to create a `readline` interface and stream over the file.
+         * See `filehandle.createReadStream()` for the options.
+         *
+         * ```js
+         * import { open } from 'node:fs/promises';
+         *
+         * const file = await open('./some/file/to/read');
+         *
+         * for await (const line of file.readLines()) {
+         *   console.log(line);
+         * }
+         * ```
+         * @since v18.11.0
+         */
+        readLines(options?: CreateReadStreamOptions): ReadlineInterface;
+        /**
+         * @since v10.0.0
+         * @return Fulfills with an {fs.Stats} for the file.
+         */
+        stat(
+            opts?: StatOptions & {
+                bigint?: false | undefined;
+            },
+        ): Promise<Stats>;
+        stat(
+            opts: StatOptions & {
+                bigint: true;
+            },
+        ): Promise<BigIntStats>;
+        stat(opts?: StatOptions): Promise<Stats | BigIntStats>;
+        /**
+         * Truncates the file.
+         *
+         * If the file was larger than `len` bytes, only the first `len` bytes will be
+         * retained in the file.
+         *
+         * The following example retains only the first four bytes of the file:
+         *
+         * ```js
+         * import { open } from 'node:fs/promises';
+         *
+         * let filehandle = null;
+         * try {
+         *   filehandle = await open('temp.txt', 'r+');
+         *   await filehandle.truncate(4);
+         * } finally {
+         *   await filehandle?.close();
+         * }
+         * ```
+         *
+         * If the file previously was shorter than `len` bytes, it is extended, and the
+         * extended part is filled with null bytes (`'\0'`):
+         *
+         * If `len` is negative then `0` will be used.
+         * @since v10.0.0
+         * @param [len=0]
+         * @return Fulfills with `undefined` upon success.
+         */
+        truncate(len?: number): Promise<void>;
+        /**
+         * Change the file system timestamps of the object referenced by the `FileHandle` then fulfills the promise with no arguments upon success.
+         * @since v10.0.0
+         */
+        utimes(atime: TimeLike, mtime: TimeLike): Promise<void>;
+        /**
+         * Asynchronously writes data to a file, replacing the file if it already exists. `data` can be a string, a buffer, an
+         * [AsyncIterable](https://tc39.github.io/ecma262/#sec-asynciterable-interface), or an
+         * [Iterable](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#The_iterable_protocol) object.
+         * The promise is fulfilled with no arguments upon success.
+         *
+         * If `options` is a string, then it specifies the `encoding`.
+         *
+         * The `FileHandle` has to support writing.
+         *
+         * It is unsafe to use `filehandle.writeFile()` multiple times on the same file
+         * without waiting for the promise to be fulfilled (or rejected).
+         *
+         * If one or more `filehandle.write()` calls are made on a file handle and then a`filehandle.writeFile()` call is made, the data will be written from the
+         * current position till the end of the file. It doesn't always write from the
+         * beginning of the file.
+         * @since v10.0.0
+         */
+        writeFile(
+            data: string | Uint8Array,
+            options?:
+                | (ObjectEncodingOptions & Abortable)
+                | BufferEncoding
+                | null,
+        ): Promise<void>;
+        /**
+         * Write `buffer` to the file.
+         *
+         * The promise is fulfilled with an object containing two properties:
+         *
+         * It is unsafe to use `filehandle.write()` multiple times on the same file
+         * without waiting for the promise to be fulfilled (or rejected). For this
+         * scenario, use `filehandle.createWriteStream()`.
+         *
+         * On Linux, positional writes do not work when the file is opened in append mode.
+         * The kernel ignores the position argument and always appends the data to
+         * the end of the file.
+         * @since v10.0.0
+         * @param offset The start position from within `buffer` where the data to write begins.
+         * @param [length=buffer.byteLength - offset] The number of bytes from `buffer` to write.
+         * @param [position='null'] The offset from the beginning of the file where the data from `buffer` should be written. If `position` is not a `number`, the data will be written at the current
+         * position. See the POSIX pwrite(2) documentation for more detail.
+         */
+        write<TBuffer extends NodeJS.ArrayBufferView>(
+            buffer: TBuffer,
+            offset?: number | null,
+            length?: number | null,
+            position?: number | null,
+        ): Promise<{
+            bytesWritten: number;
+            buffer: TBuffer;
+        }>;
+        write<TBuffer extends Uint8Array>(
+            buffer: TBuffer,
+            options?: { offset?: number; length?: number; position?: number },
+        ): Promise<{
+            bytesWritten: number;
+            buffer: TBuffer;
+        }>;
+        write(
+            data: string,
+            position?: number | null,
+            encoding?: BufferEncoding | null,
+        ): Promise<{
+            bytesWritten: number;
+            buffer: string;
+        }>;
+        /**
+         * Write an array of [ArrayBufferView](https://developer.mozilla.org/en-US/docs/Web/API/ArrayBufferView) s to the file.
+         *
+         * The promise is fulfilled with an object containing a two properties:
+         *
+         * It is unsafe to call `writev()` multiple times on the same file without waiting
+         * for the promise to be fulfilled (or rejected).
+         *
+         * On Linux, positional writes don't work when the file is opened in append mode.
+         * The kernel ignores the position argument and always appends the data to
+         * the end of the file.
+         * @since v12.9.0
+         * @param [position='null'] The offset from the beginning of the file where the data from `buffers` should be written. If `position` is not a `number`, the data will be written at the current
+         * position.
+         */
+        writev<TBuffers extends readonly NodeJS.ArrayBufferView[]>(
+            buffers: TBuffers,
+            position?: number,
+        ): Promise<WriteVResult<TBuffers>>;
+        /**
+         * Read from a file and write to an array of [ArrayBufferView](https://developer.mozilla.org/en-US/docs/Web/API/ArrayBufferView) s
+         * @since v13.13.0, v12.17.0
+         * @param [position='null'] The offset from the beginning of the file where the data should be read from. If `position` is not a `number`, the data will be read from the current position.
+         * @return Fulfills upon success an object containing two properties:
+         */
+        readv<TBuffers extends readonly NodeJS.ArrayBufferView[]>(
+            buffers: TBuffers,
+            position?: number,
+        ): Promise<ReadVResult<TBuffers>>;
+        /**
+         * Closes the file handle after waiting for any pending operation on the handle to
+         * complete.
+         *
+         * ```js
+         * import { open } from 'node:fs/promises';
+         *
+         * let filehandle;
+         * try {
+         *   filehandle = await open('thefile.txt', 'r');
+         * } finally {
+         *   await filehandle?.close();
+         * }
+         * ```
+         * @since v10.0.0
+         * @return Fulfills with `undefined` upon success.
+         */
+        close(): Promise<void>;
+        /**
+         * Calls `filehandle.close()` and returns a promise that fulfills when the
+         * filehandle is closed.
+         * @since v20.4.0, v18.8.0
+         */
+        [Symbol.asyncDispose](): Promise<void>;
+    }
+    const constants: typeof fsConstants;
+    /**
+     * Tests a user's permissions for the file or directory specified by `path`.
+     * The `mode` argument is an optional integer that specifies the accessibility
+     * checks to be performed. `mode` should be either the value `fs.constants.F_OK` or a mask consisting of the bitwise OR of any of `fs.constants.R_OK`, `fs.constants.W_OK`, and `fs.constants.X_OK`
+     * (e.g.`fs.constants.W_OK | fs.constants.R_OK`). Check `File access constants` for
+     * possible values of `mode`.
+     *
+     * If the accessibility check is successful, the promise is fulfilled with no
+     * value. If any of the accessibility checks fail, the promise is rejected
+     * with an [Error](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error) object. The following example checks if the file`/etc/passwd` can be read and
+     * written by the current process.
+     *
+     * ```js
+     * import { access, constants } from 'node:fs/promises';
+     *
+     * try {
+     *   await access('/etc/passwd', constants.R_OK | constants.W_OK);
+     *   console.log('can access');
+     * } catch {
+     *   console.error('cannot access');
+     * }
+     * ```
+     *
+     * Using `fsPromises.access()` to check for the accessibility of a file before
+     * calling `fsPromises.open()` is not recommended. Doing so introduces a race
+     * condition, since other processes may change the file's state between the two
+     * calls. Instead, user code should open/read/write the file directly and handle
+     * the error raised if the file is not accessible.
+     * @since v10.0.0
+     * @param [mode=fs.constants.F_OK]
+     * @return Fulfills with `undefined` upon success.
+     */
+    function access(path: PathLike, mode?: number): Promise<void>;
+    /**
+     * Asynchronously copies `src` to `dest`. By default, `dest` is overwritten if it
+     * already exists.
+     *
+     * No guarantees are made about the atomicity of the copy operation. If an
+     * error occurs after the destination file has been opened for writing, an attempt
+     * will be made to remove the destination.
+     *
+     * ```js
+     * import { copyFile, constants } from 'node:fs/promises';
+     *
+     * try {
+     *   await copyFile('source.txt', 'destination.txt');
+     *   console.log('source.txt was copied to destination.txt');
+     * } catch {
+     *   console.error('The file could not be copied');
+     * }
+     *
+     * // By using COPYFILE_EXCL, the operation will fail if destination.txt exists.
+     * try {
+     *   await copyFile('source.txt', 'destination.txt', constants.COPYFILE_EXCL);
+     *   console.log('source.txt was copied to destination.txt');
+     * } catch {
+     *   console.error('The file could not be copied');
+     * }
+     * ```
+     * @since v10.0.0
+     * @param src source filename to copy
+     * @param dest destination filename of the copy operation
+     * @param [mode=0] Optional modifiers that specify the behavior of the copy operation. It is possible to create a mask consisting of the bitwise OR of two or more values (e.g.
+     * `fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE`)
+     * @return Fulfills with `undefined` upon success.
+     */
+    function copyFile(src: PathLike, dest: PathLike, mode?: number): Promise<void>;
+    /**
+     * Opens a `FileHandle`.
+     *
+     * Refer to the POSIX [`open(2)`](http://man7.org/linux/man-pages/man2/open.2.html) documentation for more detail.
+     *
+     * Some characters (`< > : " / \ | ? *`) are reserved under Windows as documented
+     * by [Naming Files, Paths, and Namespaces](https://docs.microsoft.com/en-us/windows/desktop/FileIO/naming-a-file). Under NTFS, if the filename contains
+     * a colon, Node.js will open a file system stream, as described by [this MSDN page](https://docs.microsoft.com/en-us/windows/desktop/FileIO/using-streams).
+     * @since v10.0.0
+     * @param [flags='r'] See `support of file system `flags``.
+     * @param [mode=0o666] Sets the file mode (permission and sticky bits) if the file is created.
+     * @return Fulfills with a {FileHandle} object.
+     */
+    function open(path: PathLike, flags?: string | number, mode?: Mode): Promise<FileHandle>;
+    /**
+     * Renames `oldPath` to `newPath`.
+     * @since v10.0.0
+     * @return Fulfills with `undefined` upon success.
+     */
+    function rename(oldPath: PathLike, newPath: PathLike): Promise<void>;
+    /**
+     * Truncates (shortens or extends the length) of the content at `path` to `len` bytes.
+     * @since v10.0.0
+     * @param [len=0]
+     * @return Fulfills with `undefined` upon success.
+     */
+    function truncate(path: PathLike, len?: number): Promise<void>;
+    /**
+     * Removes the directory identified by `path`.
+     *
+     * Using `fsPromises.rmdir()` on a file (not a directory) results in the
+     * promise being rejected with an `ENOENT` error on Windows and an `ENOTDIR` error on POSIX.
+     *
+     * To get a behavior similar to the `rm -rf` Unix command, use `fsPromises.rm()` with options `{ recursive: true, force: true }`.
+     * @since v10.0.0
+     * @return Fulfills with `undefined` upon success.
+     */
+    function rmdir(path: PathLike): Promise<void>;
+    /**
+     * Removes files and directories (modeled on the standard POSIX `rm` utility).
+     * @since v14.14.0
+     * @return Fulfills with `undefined` upon success.
+     */
+    function rm(path: PathLike, options?: RmOptions): Promise<void>;
+    /**
+     * Asynchronously creates a directory.
+     *
+     * The optional `options` argument can be an integer specifying `mode` (permission
+     * and sticky bits), or an object with a `mode` property and a `recursive` property indicating whether parent directories should be created. Calling `fsPromises.mkdir()` when `path` is a directory
+     * that exists results in a
+     * rejection only when `recursive` is false.
+     *
+     * ```js
+     * import { mkdir } from 'node:fs/promises';
+     *
+     * try {
+     *   const projectFolder = new URL('./test/project/', import.meta.url);
+     *   const createDir = await mkdir(projectFolder, { recursive: true });
+     *
+     *   console.log(`created ${createDir}`);
+     * } catch (err) {
+     *   console.error(err.message);
+     * }
+     * ```
+     * @since v10.0.0
+     * @return Upon success, fulfills with `undefined` if `recursive` is `false`, or the first directory path created if `recursive` is `true`.
+     */
+    function mkdir(
+        path: PathLike,
+        options: MakeDirectoryOptions & {
+            recursive: true;
+        },
+    ): Promise<string | undefined>;
+    /**
+     * Asynchronous mkdir(2) - create a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
+     * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
+     */
+    function mkdir(
+        path: PathLike,
+        options?:
+            | Mode
+            | (MakeDirectoryOptions & {
+                recursive?: false | undefined;
+            })
+            | null,
+    ): Promise<void>;
+    /**
+     * Asynchronous mkdir(2) - create a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options Either the file mode, or an object optionally specifying the file mode and whether parent folders
+     * should be created. If a string is passed, it is parsed as an octal integer. If not specified, defaults to `0o777`.
+     */
+    function mkdir(path: PathLike, options?: Mode | MakeDirectoryOptions | null): Promise<string | undefined>;
+    /**
+     * Reads the contents of a directory.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use for
+     * the filenames. If the `encoding` is set to `'buffer'`, the filenames returned
+     * will be passed as `Buffer` objects.
+     *
+     * If `options.withFileTypes` is set to `true`, the returned array will contain `fs.Dirent` objects.
+     *
+     * ```js
+     * import { readdir } from 'node:fs/promises';
+     *
+     * try {
+     *   const files = await readdir(path);
+     *   for (const file of files)
+     *     console.log(file);
+     * } catch (err) {
+     *   console.error(err);
+     * }
+     * ```
+     * @since v10.0.0
+     * @return Fulfills with an array of the names of the files in the directory excluding `'.'` and `'..'`.
+     */
+    function readdir(
+        path: PathLike,
+        options?:
+            | (ObjectEncodingOptions & {
+                withFileTypes?: false | undefined;
+                recursive?: boolean | undefined;
+            })
+            | BufferEncoding
+            | null,
+    ): Promise<string[]>;
+    /**
+     * Asynchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readdir(
+        path: PathLike,
+        options:
+            | {
+                encoding: "buffer";
+                withFileTypes?: false | undefined;
+                recursive?: boolean | undefined;
+            }
+            | "buffer",
+    ): Promise<NonSharedBuffer[]>;
+    /**
+     * Asynchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readdir(
+        path: PathLike,
+        options?:
+            | (ObjectEncodingOptions & {
+                withFileTypes?: false | undefined;
+                recursive?: boolean | undefined;
+            })
+            | BufferEncoding
+            | null,
+    ): Promise<string[] | NonSharedBuffer[]>;
+    /**
+     * Asynchronous readdir(3) - read a directory.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options If called with `withFileTypes: true` the result data will be an array of Dirent.
+     */
+    function readdir(
+        path: PathLike,
+        options: ObjectEncodingOptions & {
+            withFileTypes: true;
+            recursive?: boolean | undefined;
+        },
+    ): Promise<Dirent[]>;
+    /**
+     * Asynchronous readdir(3) - read a directory.
+     * @param path A path to a directory. If a URL is provided, it must use the `file:` protocol.
+     * @param options Must include `withFileTypes: true` and `encoding: 'buffer'`.
+     */
+    function readdir(
+        path: PathLike,
+        options: {
+            encoding: "buffer";
+            withFileTypes: true;
+            recursive?: boolean | undefined;
+        },
+    ): Promise<Dirent<NonSharedBuffer>[]>;
+    /**
+     * Reads the contents of the symbolic link referred to by `path`. See the POSIX [`readlink(2)`](http://man7.org/linux/man-pages/man2/readlink.2.html) documentation for more detail. The promise is
+     * fulfilled with the`linkString` upon success.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use for
+     * the link path returned. If the `encoding` is set to `'buffer'`, the link path
+     * returned will be passed as a `Buffer` object.
+     * @since v10.0.0
+     * @return Fulfills with the `linkString` upon success.
+     */
+    function readlink(path: PathLike, options?: ObjectEncodingOptions | BufferEncoding | null): Promise<string>;
+    /**
+     * Asynchronous readlink(2) - read value of a symbolic link.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readlink(path: PathLike, options: BufferEncodingOption): Promise<NonSharedBuffer>;
+    /**
+     * Asynchronous readlink(2) - read value of a symbolic link.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function readlink(
+        path: PathLike,
+        options?: ObjectEncodingOptions | string | null,
+    ): Promise<string | NonSharedBuffer>;
+    /**
+     * Creates a symbolic link.
+     *
+     * The `type` argument is only used on Windows platforms and can be one of `'dir'`, `'file'`, or `'junction'`. If the `type` argument is not a string, Node.js will
+     * autodetect `target` type and use `'file'` or `'dir'`. If the `target` does not
+     * exist, `'file'` will be used. Windows junction points require the destination
+     * path to be absolute. When using `'junction'`, the `target` argument will
+     * automatically be normalized to absolute path. Junction points on NTFS volumes
+     * can only point to directories.
+     * @since v10.0.0
+     * @param [type='null']
+     * @return Fulfills with `undefined` upon success.
+     */
+    function symlink(target: PathLike, path: PathLike, type?: string | null): Promise<void>;
+    /**
+     * Equivalent to `fsPromises.stat()` unless `path` refers to a symbolic link,
+     * in which case the link itself is stat-ed, not the file that it refers to.
+     * Refer to the POSIX [`lstat(2)`](http://man7.org/linux/man-pages/man2/lstat.2.html) document for more detail.
+     * @since v10.0.0
+     * @return Fulfills with the {fs.Stats} object for the given symbolic link `path`.
+     */
+    function lstat(
+        path: PathLike,
+        opts?: StatOptions & {
+            bigint?: false | undefined;
+        },
+    ): Promise<Stats>;
+    function lstat(
+        path: PathLike,
+        opts: StatOptions & {
+            bigint: true;
+        },
+    ): Promise<BigIntStats>;
+    function lstat(path: PathLike, opts?: StatOptions): Promise<Stats | BigIntStats>;
+    /**
+     * @since v10.0.0
+     * @return Fulfills with the {fs.Stats} object for the given `path`.
+     */
+    function stat(
+        path: PathLike,
+        opts?: StatOptions & {
+            bigint?: false | undefined;
+        },
+    ): Promise<Stats>;
+    function stat(
+        path: PathLike,
+        opts: StatOptions & {
+            bigint: true;
+        },
+    ): Promise<BigIntStats>;
+    function stat(path: PathLike, opts?: StatOptions): Promise<Stats | BigIntStats>;
+    /**
+     * @since v19.6.0, v18.15.0
+     * @return Fulfills with the {fs.StatFs} object for the given `path`.
+     */
+    function statfs(
+        path: PathLike,
+        opts?: StatFsOptions & {
+            bigint?: false | undefined;
+        },
+    ): Promise<StatsFs>;
+    function statfs(
+        path: PathLike,
+        opts: StatFsOptions & {
+            bigint: true;
+        },
+    ): Promise<BigIntStatsFs>;
+    function statfs(path: PathLike, opts?: StatFsOptions): Promise<StatsFs | BigIntStatsFs>;
+    /**
+     * Creates a new link from the `existingPath` to the `newPath`. See the POSIX [`link(2)`](http://man7.org/linux/man-pages/man2/link.2.html) documentation for more detail.
+     * @since v10.0.0
+     * @return Fulfills with `undefined` upon success.
+     */
+    function link(existingPath: PathLike, newPath: PathLike): Promise<void>;
+    /**
+     * If `path` refers to a symbolic link, then the link is removed without affecting
+     * the file or directory to which that link refers. If the `path` refers to a file
+     * path that is not a symbolic link, the file is deleted. See the POSIX [`unlink(2)`](http://man7.org/linux/man-pages/man2/unlink.2.html) documentation for more detail.
+     * @since v10.0.0
+     * @return Fulfills with `undefined` upon success.
+     */
+    function unlink(path: PathLike): Promise<void>;
+    /**
+     * Changes the permissions of a file.
+     * @since v10.0.0
+     * @return Fulfills with `undefined` upon success.
+     */
+    function chmod(path: PathLike, mode: Mode): Promise<void>;
+    /**
+     * Changes the permissions on a symbolic link.
+     *
+     * This method is only implemented on macOS.
+     * @deprecated Since v10.0.0
+     * @return Fulfills with `undefined` upon success.
+     */
+    function lchmod(path: PathLike, mode: Mode): Promise<void>;
+    /**
+     * Changes the ownership on a symbolic link.
+     * @since v10.0.0
+     * @return Fulfills with `undefined` upon success.
+     */
+    function lchown(path: PathLike, uid: number, gid: number): Promise<void>;
+    /**
+     * Changes the access and modification times of a file in the same way as `fsPromises.utimes()`, with the difference that if the path refers to a
+     * symbolic link, then the link is not dereferenced: instead, the timestamps of
+     * the symbolic link itself are changed.
+     * @since v14.5.0, v12.19.0
+     * @return Fulfills with `undefined` upon success.
+     */
+    function lutimes(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>;
+    /**
+     * Changes the ownership of a file.
+     * @since v10.0.0
+     * @return Fulfills with `undefined` upon success.
+     */
+    function chown(path: PathLike, uid: number, gid: number): Promise<void>;
+    /**
+     * Change the file system timestamps of the object referenced by `path`.
+     *
+     * The `atime` and `mtime` arguments follow these rules:
+     *
+     * * Values can be either numbers representing Unix epoch time, `Date`s, or a
+     * numeric string like `'123456789.0'`.
+     * * If the value can not be converted to a number, or is `NaN`, `Infinity`, or `-Infinity`, an `Error` will be thrown.
+     * @since v10.0.0
+     * @return Fulfills with `undefined` upon success.
+     */
+    function utimes(path: PathLike, atime: TimeLike, mtime: TimeLike): Promise<void>;
+    /**
+     * Determines the actual location of `path` using the same semantics as the `fs.realpath.native()` function.
+     *
+     * Only paths that can be converted to UTF8 strings are supported.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use for
+     * the path. If the `encoding` is set to `'buffer'`, the path returned will be
+     * passed as a `Buffer` object.
+     *
+     * On Linux, when Node.js is linked against musl libc, the procfs file system must
+     * be mounted on `/proc` in order for this function to work. Glibc does not have
+     * this restriction.
+     * @since v10.0.0
+     * @return Fulfills with the resolved path upon success.
+     */
+    function realpath(path: PathLike, options?: ObjectEncodingOptions | BufferEncoding | null): Promise<string>;
+    /**
+     * Asynchronous realpath(3) - return the canonicalized absolute pathname.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function realpath(path: PathLike, options: BufferEncodingOption): Promise<NonSharedBuffer>;
+    /**
+     * Asynchronous realpath(3) - return the canonicalized absolute pathname.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function realpath(
+        path: PathLike,
+        options?: ObjectEncodingOptions | BufferEncoding | null,
+    ): Promise<string | NonSharedBuffer>;
+    /**
+     * Creates a unique temporary directory. A unique directory name is generated by
+     * appending six random characters to the end of the provided `prefix`. Due to
+     * platform inconsistencies, avoid trailing `X` characters in `prefix`. Some
+     * platforms, notably the BSDs, can return more than six random characters, and
+     * replace trailing `X` characters in `prefix` with random characters.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use.
+     *
+     * ```js
+     * import { mkdtemp } from 'node:fs/promises';
+     * import { join } from 'node:path';
+     * import { tmpdir } from 'node:os';
+     *
+     * try {
+     *   await mkdtemp(join(tmpdir(), 'foo-'));
+     * } catch (err) {
+     *   console.error(err);
+     * }
+     * ```
+     *
+     * The `fsPromises.mkdtemp()` method will append the six randomly selected
+     * characters directly to the `prefix` string. For instance, given a directory `/tmp`, if the intention is to create a temporary directory _within_ `/tmp`, the `prefix` must end with a trailing
+     * platform-specific path separator
+     * (`import { sep } from 'node:path'`).
+     * @since v10.0.0
+     * @return Fulfills with a string containing the file system path of the newly created temporary directory.
+     */
+    function mkdtemp(prefix: string, options?: ObjectEncodingOptions | BufferEncoding | null): Promise<string>;
+    /**
+     * Asynchronously creates a unique temporary directory.
+     * Generates six random characters to be appended behind a required `prefix` to create a unique temporary directory.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function mkdtemp(prefix: string, options: BufferEncodingOption): Promise<NonSharedBuffer>;
+    /**
+     * Asynchronously creates a unique temporary directory.
+     * Generates six random characters to be appended behind a required `prefix` to create a unique temporary directory.
+     * @param options The encoding (or an object specifying the encoding), used as the encoding of the result. If not provided, `'utf8'` is used.
+     */
+    function mkdtemp(
+        prefix: string,
+        options?: ObjectEncodingOptions | BufferEncoding | null,
+    ): Promise<string | NonSharedBuffer>;
+    interface DisposableTempDir extends AsyncDisposable {
+        /**
+         * The path of the created directory.
+         */
+        path: string;
+        /**
+         * A function which removes the created directory.
+         */
+        remove(): Promise<void>;
+        /**
+         * The same as `remove`.
+         */
+        [Symbol.asyncDispose](): Promise<void>;
+    }
+    /**
+     * The resulting Promise holds an async-disposable object whose `path` property
+     * holds the created directory path. When the object is disposed, the directory
+     * and its contents will be removed asynchronously if it still exists. If the
+     * directory cannot be deleted, disposal will throw an error. The object has an
+     * async `remove()` method which will perform the same task.
+     *
+     * Both this function and the disposal function on the resulting object are
+     * async, so it should be used with `await` + `await using` as in
+     * `await using dir = await fsPromises.mkdtempDisposable('prefix')`.
+     *
+     * <!-- TODO: link MDN docs for disposables once https://github.com/mdn/content/pull/38027 lands -->
+     *
+     * For detailed information, see the documentation of `fsPromises.mkdtemp()`.
+     *
+     * The optional `options` argument can be a string specifying an encoding, or an
+     * object with an `encoding` property specifying the character encoding to use.
+     * @since v24.4.0
+     */
+    function mkdtempDisposable(prefix: PathLike, options?: EncodingOption): Promise<DisposableTempDir>;
+    /**
+     * Asynchronously writes data to a file, replacing the file if it already exists. `data` can be a string, a buffer, an
+     * [AsyncIterable](https://tc39.github.io/ecma262/#sec-asynciterable-interface), or an
+     * [Iterable](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols#The_iterable_protocol) object.
+     *
+     * The `encoding` option is ignored if `data` is a buffer.
+     *
+     * If `options` is a string, then it specifies the encoding.
+     *
+     * The `mode` option only affects the newly created file. See `fs.open()` for more details.
+     *
+     * Any specified `FileHandle` has to support writing.
+     *
+     * It is unsafe to use `fsPromises.writeFile()` multiple times on the same file
+     * without waiting for the promise to be settled.
+     *
+     * Similarly to `fsPromises.readFile` \- `fsPromises.writeFile` is a convenience
+     * method that performs multiple `write` calls internally to write the buffer
+     * passed to it. For performance sensitive code consider using `fs.createWriteStream()` or `filehandle.createWriteStream()`.
+     *
+     * It is possible to use an `AbortSignal` to cancel an `fsPromises.writeFile()`.
+     * Cancelation is "best effort", and some amount of data is likely still
+     * to be written.
+     *
+     * ```js
+     * import { writeFile } from 'node:fs/promises';
+     * import { Buffer } from 'node:buffer';
+     *
+     * try {
+     *   const controller = new AbortController();
+     *   const { signal } = controller;
+     *   const data = new Uint8Array(Buffer.from('Hello Node.js'));
+     *   const promise = writeFile('message.txt', data, { signal });
+     *
+     *   // Abort the request before the promise settles.
+     *   controller.abort();
+     *
+     *   await promise;
+     * } catch (err) {
+     *   // When a request is aborted - err is an AbortError
+     *   console.error(err);
+     * }
+     * ```
+     *
+     * Aborting an ongoing request does not abort individual operating
+     * system requests but rather the internal buffering `fs.writeFile` performs.
+     * @since v10.0.0
+     * @param file filename or `FileHandle`
+     * @return Fulfills with `undefined` upon success.
+     */
+    function writeFile(
+        file: PathLike | FileHandle,
+        data:
+            | string
+            | NodeJS.ArrayBufferView
+            | Iterable<string | NodeJS.ArrayBufferView>
+            | AsyncIterable<string | NodeJS.ArrayBufferView>
+            | Stream,
+        options?:
+            | (ObjectEncodingOptions & {
+                mode?: Mode | undefined;
+                flag?: OpenMode | undefined;
+                /**
+                 * If all data is successfully written to the file, and `flush`
+                 * is `true`, `filehandle.sync()` is used to flush the data.
+                 * @default false
+                 */
+                flush?: boolean | undefined;
+            } & Abortable)
+            | BufferEncoding
+            | null,
+    ): Promise<void>;
+    /**
+     * Asynchronously append data to a file, creating the file if it does not yet
+     * exist. `data` can be a string or a `Buffer`.
+     *
+     * If `options` is a string, then it specifies the `encoding`.
+     *
+     * The `mode` option only affects the newly created file. See `fs.open()` for more details.
+     *
+     * The `path` may be specified as a `FileHandle` that has been opened
+     * for appending (using `fsPromises.open()`).
+     * @since v10.0.0
+     * @param path filename or {FileHandle}
+     * @return Fulfills with `undefined` upon success.
+     */
+    function appendFile(
+        path: PathLike | FileHandle,
+        data: string | Uint8Array,
+        options?: (ObjectEncodingOptions & FlagAndOpenMode & { flush?: boolean | undefined }) | BufferEncoding | null,
+    ): Promise<void>;
+    /**
+     * Asynchronously reads the entire contents of a file.
+     *
+     * If no encoding is specified (using `options.encoding`), the data is returned
+     * as a `Buffer` object. Otherwise, the data will be a string.
+     *
+     * If `options` is a string, then it specifies the encoding.
+     *
+     * When the `path` is a directory, the behavior of `fsPromises.readFile()` is
+     * platform-specific. On macOS, Linux, and Windows, the promise will be rejected
+     * with an error. On FreeBSD, a representation of the directory's contents will be
+     * returned.
+     *
+     * An example of reading a `package.json` file located in the same directory of the
+     * running code:
+     *
+     * ```js
+     * import { readFile } from 'node:fs/promises';
+     * try {
+     *   const filePath = new URL('./package.json', import.meta.url);
+     *   const contents = await readFile(filePath, { encoding: 'utf8' });
+     *   console.log(contents);
+     * } catch (err) {
+     *   console.error(err.message);
+     * }
+     * ```
+     *
+     * It is possible to abort an ongoing `readFile` using an `AbortSignal`. If a
+     * request is aborted the promise returned is rejected with an `AbortError`:
+     *
+     * ```js
+     * import { readFile } from 'node:fs/promises';
+     *
+     * try {
+     *   const controller = new AbortController();
+     *   const { signal } = controller;
+     *   const promise = readFile(fileName, { signal });
+     *
+     *   // Abort the request before the promise settles.
+     *   controller.abort();
+     *
+     *   await promise;
+     * } catch (err) {
+     *   // When a request is aborted - err is an AbortError
+     *   console.error(err);
+     * }
+     * ```
+     *
+     * Aborting an ongoing request does not abort individual operating
+     * system requests but rather the internal buffering `fs.readFile` performs.
+     *
+     * Any specified `FileHandle` has to support reading.
+     * @since v10.0.0
+     * @param path filename or `FileHandle`
+     * @return Fulfills with the contents of the file.
+     */
+    function readFile(
+        path: PathLike | FileHandle,
+        options?:
+            | ({
+                encoding?: null | undefined;
+                flag?: OpenMode | undefined;
+            } & Abortable)
+            | null,
+    ): Promise<NonSharedBuffer>;
+    /**
+     * Asynchronously reads the entire contents of a file.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * If a `FileHandle` is provided, the underlying file will _not_ be closed automatically.
+     * @param options An object that may contain an optional flag.
+     * If a flag is not provided, it defaults to `'r'`.
+     */
+    function readFile(
+        path: PathLike | FileHandle,
+        options:
+            | ({
+                encoding: BufferEncoding;
+                flag?: OpenMode | undefined;
+            } & Abortable)
+            | BufferEncoding,
+    ): Promise<string>;
+    /**
+     * Asynchronously reads the entire contents of a file.
+     * @param path A path to a file. If a URL is provided, it must use the `file:` protocol.
+     * If a `FileHandle` is provided, the underlying file will _not_ be closed automatically.
+     * @param options An object that may contain an optional flag.
+     * If a flag is not provided, it defaults to `'r'`.
+     */
+    function readFile(
+        path: PathLike | FileHandle,
+        options?:
+            | (
+                & ObjectEncodingOptions
+                & Abortable
+                & {
+                    flag?: OpenMode | undefined;
+                }
+            )
+            | BufferEncoding
+            | null,
+    ): Promise<string | NonSharedBuffer>;
+    /**
+     * Asynchronously open a directory for iterative scanning. See the POSIX [`opendir(3)`](http://man7.org/linux/man-pages/man3/opendir.3.html) documentation for more detail.
+     *
+     * Creates an `fs.Dir`, which contains all further functions for reading from
+     * and cleaning up the directory.
+     *
+     * The `encoding` option sets the encoding for the `path` while opening the
+     * directory and subsequent read operations.
+     *
+     * Example using async iteration:
+     *
+     * ```js
+     * import { opendir } from 'node:fs/promises';
+     *
+     * try {
+     *   const dir = await opendir('./');
+     *   for await (const dirent of dir)
+     *     console.log(dirent.name);
+     * } catch (err) {
+     *   console.error(err);
+     * }
+     * ```
+     *
+     * When using the async iterator, the `fs.Dir` object will be automatically
+     * closed after the iterator exits.
+     * @since v12.12.0
+     * @return Fulfills with an {fs.Dir}.
+     */
+    function opendir(path: PathLike, options?: OpenDirOptions): Promise<Dir>;
+    interface WatchOptions extends _WatchOptions {
+        maxQueue?: number | undefined;
+        overflow?: "ignore" | "throw" | undefined;
+    }
+    interface WatchOptionsWithBufferEncoding extends WatchOptions {
+        encoding: "buffer";
+    }
+    interface WatchOptionsWithStringEncoding extends WatchOptions {
+        encoding?: BufferEncoding | undefined;
+    }
+    /**
+     * Returns an async iterator that watches for changes on `filename`, where `filename`is either a file or a directory.
+     *
+     * ```js
+     * import { watch } from 'node:fs/promises';
+     *
+     * const ac = new AbortController();
+     * const { signal } = ac;
+     * setTimeout(() => ac.abort(), 10000);
+     *
+     * (async () => {
+     *   try {
+     *     const watcher = watch(__filename, { signal });
+     *     for await (const event of watcher)
+     *       console.log(event);
+     *   } catch (err) {
+     *     if (err.name === 'AbortError')
+     *       return;
+     *     throw err;
+     *   }
+     * })();
+     * ```
+     *
+     * On most platforms, `'rename'` is emitted whenever a filename appears or
+     * disappears in the directory.
+     *
+     * All the `caveats` for `fs.watch()` also apply to `fsPromises.watch()`.
+     * @since v15.9.0, v14.18.0
+     * @return of objects with the properties:
+     */
+    function watch(
+        filename: PathLike,
+        options?: WatchOptionsWithStringEncoding | BufferEncoding,
+    ): NodeJS.AsyncIterator<FileChangeInfo<string>>;
+    function watch(
+        filename: PathLike,
+        options: WatchOptionsWithBufferEncoding | "buffer",
+    ): NodeJS.AsyncIterator<FileChangeInfo<NonSharedBuffer>>;
+    function watch(
+        filename: PathLike,
+        options: WatchOptions | BufferEncoding | "buffer",
+    ): NodeJS.AsyncIterator<FileChangeInfo<string | NonSharedBuffer>>;
+    /**
+     * Asynchronously copies the entire directory structure from `src` to `dest`,
+     * including subdirectories and files.
+     *
+     * When copying a directory to another directory, globs are not supported and
+     * behavior is similar to `cp dir1/ dir2/`.
+     * @since v16.7.0
+     * @experimental
+     * @param src source path to copy.
+     * @param dest destination path to copy to.
+     * @return Fulfills with `undefined` upon success.
+     */
+    function cp(source: string | URL, destination: string | URL, opts?: CopyOptions): Promise<void>;
+    /**
+     * ```js
+     * import { glob } from 'node:fs/promises';
+     *
+     * for await (const entry of glob('*.js'))
+     *   console.log(entry);
+     * ```
+     * @since v22.0.0
+     * @returns An AsyncIterator that yields the paths of files
+     * that match the pattern.
+     */
+    function glob(pattern: string | readonly string[]): NodeJS.AsyncIterator<string>;
+    function glob(
+        pattern: string | readonly string[],
+        options: GlobOptionsWithFileTypes,
+    ): NodeJS.AsyncIterator<Dirent>;
+    function glob(
+        pattern: string | readonly string[],
+        options: GlobOptionsWithoutFileTypes,
+    ): NodeJS.AsyncIterator<string>;
+    function glob(
+        pattern: string | readonly string[],
+        options: GlobOptions,
+    ): NodeJS.AsyncIterator<Dirent | string>;
+}
+declare module "fs/promises" {
+    export * from "node:fs/promises";
+}
diff --git a/mqtt-backend/node_modules/@types/node/globals.d.ts b/mqtt-backend/node_modules/@types/node/globals.d.ts
new file mode 100644
index 0000000..36e7f90
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/globals.d.ts
@@ -0,0 +1,150 @@
+declare var global: typeof globalThis;
+
+declare var process: NodeJS.Process;
+
+interface ErrorConstructor {
+    /**
+     * Creates a `.stack` property on `targetObject`, which when accessed returns
+     * a string representing the location in the code at which
+     * `Error.captureStackTrace()` was called.
+     *
+     * ```js
+     * const myObject = {};
+     * Error.captureStackTrace(myObject);
+     * myObject.stack;  // Similar to `new Error().stack`
+     * ```
+     *
+     * The first line of the trace will be prefixed with
+     * `${myObject.name}: ${myObject.message}`.
+     *
+     * The optional `constructorOpt` argument accepts a function. If given, all frames
+     * above `constructorOpt`, including `constructorOpt`, will be omitted from the
+     * generated stack trace.
+     *
+     * The `constructorOpt` argument is useful for hiding implementation
+     * details of error generation from the user. For instance:
+     *
+     * ```js
+     * function a() {
+     *   b();
+     * }
+     *
+     * function b() {
+     *   c();
+     * }
+     *
+     * function c() {
+     *   // Create an error without stack trace to avoid calculating the stack trace twice.
+     *   const { stackTraceLimit } = Error;
+     *   Error.stackTraceLimit = 0;
+     *   const error = new Error();
+     *   Error.stackTraceLimit = stackTraceLimit;
+     *
+     *   // Capture the stack trace above function b
+     *   Error.captureStackTrace(error, b); // Neither function c, nor b is included in the stack trace
+     *   throw error;
+     * }
+     *
+     * a();
+     * ```
+     */
+    captureStackTrace(targetObject: object, constructorOpt?: Function): void;
+    /**
+     * @see https://v8.dev/docs/stack-trace-api#customizing-stack-traces
+     */
+    prepareStackTrace(err: Error, stackTraces: NodeJS.CallSite[]): any;
+    /**
+     * The `Error.stackTraceLimit` property specifies the number of stack frames
+     * collected by a stack trace (whether generated by `new Error().stack` or
+     * `Error.captureStackTrace(obj)`).
+     *
+     * The default value is `10` but may be set to any valid JavaScript number. Changes
+     * will affect any stack trace captured _after_ the value has been changed.
+     *
+     * If set to a non-number value, or set to a negative number, stack traces will
+     * not capture any frames.
+     */
+    stackTraceLimit: number;
+}
+
+/**
+ * Enable this API with the `--expose-gc` CLI flag.
+ */
+declare var gc: NodeJS.GCFunction | undefined;
+
+declare namespace NodeJS {
+    interface CallSite {
+        getColumnNumber(): number | null;
+        getEnclosingColumnNumber(): number | null;
+        getEnclosingLineNumber(): number | null;
+        getEvalOrigin(): string | undefined;
+        getFileName(): string | null;
+        getFunction(): Function | undefined;
+        getFunctionName(): string | null;
+        getLineNumber(): number | null;
+        getMethodName(): string | null;
+        getPosition(): number;
+        getPromiseIndex(): number | null;
+        getScriptHash(): string;
+        getScriptNameOrSourceURL(): string | null;
+        getThis(): unknown;
+        getTypeName(): string | null;
+        isAsync(): boolean;
+        isConstructor(): boolean;
+        isEval(): boolean;
+        isNative(): boolean;
+        isPromiseAll(): boolean;
+        isToplevel(): boolean;
+    }
+
+    interface ErrnoException extends Error {
+        errno?: number | undefined;
+        code?: string | undefined;
+        path?: string | undefined;
+        syscall?: string | undefined;
+    }
+
+    interface RefCounted {
+        ref(): this;
+        unref(): this;
+    }
+
+    interface Dict<T> {
+        [key: string]: T | undefined;
+    }
+
+    interface ReadOnlyDict<T> {
+        readonly [key: string]: T | undefined;
+    }
+
+    type PartialOptions<T> = { [K in keyof T]?: T[K] | undefined };
+
+    interface GCFunction {
+        (minor?: boolean): void;
+        (options: NodeJS.GCOptions & { execution: "async" }): Promise<void>;
+        (options: NodeJS.GCOptions): void;
+    }
+
+    interface GCOptions {
+        execution?: "sync" | "async" | undefined;
+        flavor?: "regular" | "last-resort" | undefined;
+        type?: "major-snapshot" | "major" | "minor" | undefined;
+        filename?: string | undefined;
+    }
+
+    /** An iterable iterator returned by the Node.js API. */
+    interface Iterator<T, TReturn = undefined, TNext = any> extends IteratorObject<T, TReturn, TNext> {
+        [Symbol.iterator](): NodeJS.Iterator<T, TReturn, TNext>;
+    }
+
+    /** An async iterable iterator returned by the Node.js API. */
+    interface AsyncIterator<T, TReturn = undefined, TNext = any> extends AsyncIteratorObject<T, TReturn, TNext> {
+        [Symbol.asyncIterator](): NodeJS.AsyncIterator<T, TReturn, TNext>;
+    }
+
+    /** The [`BufferSource`](https://webidl.spec.whatwg.org/#BufferSource) type from the Web IDL specification. */
+    type BufferSource = NonSharedArrayBufferView | ArrayBuffer;
+
+    /** The [`AllowSharedBufferSource`](https://webidl.spec.whatwg.org/#AllowSharedBufferSource) type from the Web IDL specification. */
+    type AllowSharedBufferSource = ArrayBufferView | ArrayBufferLike;
+}
diff --git a/mqtt-backend/node_modules/@types/node/globals.typedarray.d.ts b/mqtt-backend/node_modules/@types/node/globals.typedarray.d.ts
new file mode 100644
index 0000000..e69dd0c
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/globals.typedarray.d.ts
@@ -0,0 +1,101 @@
+export {}; // Make this a module
+
+declare global {
+    namespace NodeJS {
+        type TypedArray<TArrayBuffer extends ArrayBufferLike = ArrayBufferLike> =
+            | Uint8Array<TArrayBuffer>
+            | Uint8ClampedArray<TArrayBuffer>
+            | Uint16Array<TArrayBuffer>
+            | Uint32Array<TArrayBuffer>
+            | Int8Array<TArrayBuffer>
+            | Int16Array<TArrayBuffer>
+            | Int32Array<TArrayBuffer>
+            | BigUint64Array<TArrayBuffer>
+            | BigInt64Array<TArrayBuffer>
+            | Float16Array<TArrayBuffer>
+            | Float32Array<TArrayBuffer>
+            | Float64Array<TArrayBuffer>;
+        type ArrayBufferView<TArrayBuffer extends ArrayBufferLike = ArrayBufferLike> =
+            | TypedArray<TArrayBuffer>
+            | DataView<TArrayBuffer>;
+
+        // The following aliases are required to allow use of non-shared ArrayBufferViews in @types/node
+        // while maintaining compatibility with TS <=5.6.
+        // TODO: remove once @types/node no longer supports TS 5.6, and replace with native types.
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedUint8Array = Uint8Array<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedUint8ClampedArray = Uint8ClampedArray<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedUint16Array = Uint16Array<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedUint32Array = Uint32Array<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedInt8Array = Int8Array<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedInt16Array = Int16Array<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedInt32Array = Int32Array<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedBigUint64Array = BigUint64Array<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedBigInt64Array = BigInt64Array<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedFloat16Array = Float16Array<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedFloat32Array = Float32Array<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedFloat64Array = Float64Array<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedDataView = DataView<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedTypedArray = TypedArray<ArrayBuffer>;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedArrayBufferView = ArrayBufferView<ArrayBuffer>;
+    }
+}
diff --git a/mqtt-backend/node_modules/@types/node/http.d.ts b/mqtt-backend/node_modules/@types/node/http.d.ts
new file mode 100644
index 0000000..c2e00e7
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/http.d.ts
@@ -0,0 +1,2147 @@
+declare module "node:http" {
+    import { NonSharedBuffer } from "node:buffer";
+    import { LookupOptions } from "node:dns";
+    import { EventEmitter } from "node:events";
+    import * as net from "node:net";
+    import * as stream from "node:stream";
+    import { URL } from "node:url";
+    // incoming headers will never contain number
+    interface IncomingHttpHeaders extends NodeJS.Dict<string | string[]> {
+        accept?: string | undefined;
+        "accept-encoding"?: string | undefined;
+        "accept-language"?: string | undefined;
+        "accept-patch"?: string | undefined;
+        "accept-ranges"?: string | undefined;
+        "access-control-allow-credentials"?: string | undefined;
+        "access-control-allow-headers"?: string | undefined;
+        "access-control-allow-methods"?: string | undefined;
+        "access-control-allow-origin"?: string | undefined;
+        "access-control-expose-headers"?: string | undefined;
+        "access-control-max-age"?: string | undefined;
+        "access-control-request-headers"?: string | undefined;
+        "access-control-request-method"?: string | undefined;
+        age?: string | undefined;
+        allow?: string | undefined;
+        "alt-svc"?: string | undefined;
+        authorization?: string | undefined;
+        "cache-control"?: string | undefined;
+        connection?: string | undefined;
+        "content-disposition"?: string | undefined;
+        "content-encoding"?: string | undefined;
+        "content-language"?: string | undefined;
+        "content-length"?: string | undefined;
+        "content-location"?: string | undefined;
+        "content-range"?: string | undefined;
+        "content-type"?: string | undefined;
+        cookie?: string | undefined;
+        date?: string | undefined;
+        etag?: string | undefined;
+        expect?: string | undefined;
+        expires?: string | undefined;
+        forwarded?: string | undefined;
+        from?: string | undefined;
+        host?: string | undefined;
+        "if-match"?: string | undefined;
+        "if-modified-since"?: string | undefined;
+        "if-none-match"?: string | undefined;
+        "if-unmodified-since"?: string | undefined;
+        "last-modified"?: string | undefined;
+        location?: string | undefined;
+        origin?: string | undefined;
+        pragma?: string | undefined;
+        "proxy-authenticate"?: string | undefined;
+        "proxy-authorization"?: string | undefined;
+        "public-key-pins"?: string | undefined;
+        range?: string | undefined;
+        referer?: string | undefined;
+        "retry-after"?: string | undefined;
+        "sec-fetch-site"?: string | undefined;
+        "sec-fetch-mode"?: string | undefined;
+        "sec-fetch-user"?: string | undefined;
+        "sec-fetch-dest"?: string | undefined;
+        "sec-websocket-accept"?: string | undefined;
+        "sec-websocket-extensions"?: string | undefined;
+        "sec-websocket-key"?: string | undefined;
+        "sec-websocket-protocol"?: string | undefined;
+        "sec-websocket-version"?: string | undefined;
+        "set-cookie"?: string[] | undefined;
+        "strict-transport-security"?: string | undefined;
+        tk?: string | undefined;
+        trailer?: string | undefined;
+        "transfer-encoding"?: string | undefined;
+        upgrade?: string | undefined;
+        "user-agent"?: string | undefined;
+        vary?: string | undefined;
+        via?: string | undefined;
+        warning?: string | undefined;
+        "www-authenticate"?: string | undefined;
+    }
+    // outgoing headers allows numbers (as they are converted internally to strings)
+    type OutgoingHttpHeader = number | string | string[];
+    interface OutgoingHttpHeaders extends NodeJS.Dict<OutgoingHttpHeader> {
+        accept?: string | string[] | undefined;
+        "accept-charset"?: string | string[] | undefined;
+        "accept-encoding"?: string | string[] | undefined;
+        "accept-language"?: string | string[] | undefined;
+        "accept-ranges"?: string | undefined;
+        "access-control-allow-credentials"?: string | undefined;
+        "access-control-allow-headers"?: string | undefined;
+        "access-control-allow-methods"?: string | undefined;
+        "access-control-allow-origin"?: string | undefined;
+        "access-control-expose-headers"?: string | undefined;
+        "access-control-max-age"?: string | undefined;
+        "access-control-request-headers"?: string | undefined;
+        "access-control-request-method"?: string | undefined;
+        age?: string | undefined;
+        allow?: string | undefined;
+        authorization?: string | undefined;
+        "cache-control"?: string | undefined;
+        "cdn-cache-control"?: string | undefined;
+        connection?: string | string[] | undefined;
+        "content-disposition"?: string | undefined;
+        "content-encoding"?: string | undefined;
+        "content-language"?: string | undefined;
+        "content-length"?: string | number | undefined;
+        "content-location"?: string | undefined;
+        "content-range"?: string | undefined;
+        "content-security-policy"?: string | undefined;
+        "content-security-policy-report-only"?: string | undefined;
+        "content-type"?: string | undefined;
+        cookie?: string | string[] | undefined;
+        dav?: string | string[] | undefined;
+        dnt?: string | undefined;
+        date?: string | undefined;
+        etag?: string | undefined;
+        expect?: string | undefined;
+        expires?: string | undefined;
+        forwarded?: string | undefined;
+        from?: string | undefined;
+        host?: string | undefined;
+        "if-match"?: string | undefined;
+        "if-modified-since"?: string | undefined;
+        "if-none-match"?: string | undefined;
+        "if-range"?: string | undefined;
+        "if-unmodified-since"?: string | undefined;
+        "last-modified"?: string | undefined;
+        link?: string | string[] | undefined;
+        location?: string | undefined;
+        "max-forwards"?: string | undefined;
+        origin?: string | undefined;
+        pragma?: string | string[] | undefined;
+        "proxy-authenticate"?: string | string[] | undefined;
+        "proxy-authorization"?: string | undefined;
+        "public-key-pins"?: string | undefined;
+        "public-key-pins-report-only"?: string | undefined;
+        range?: string | undefined;
+        referer?: string | undefined;
+        "referrer-policy"?: string | undefined;
+        refresh?: string | undefined;
+        "retry-after"?: string | undefined;
+        "sec-websocket-accept"?: string | undefined;
+        "sec-websocket-extensions"?: string | string[] | undefined;
+        "sec-websocket-key"?: string | undefined;
+        "sec-websocket-protocol"?: string | string[] | undefined;
+        "sec-websocket-version"?: string | undefined;
+        server?: string | undefined;
+        "set-cookie"?: string | string[] | undefined;
+        "strict-transport-security"?: string | undefined;
+        te?: string | undefined;
+        trailer?: string | undefined;
+        "transfer-encoding"?: string | undefined;
+        "user-agent"?: string | undefined;
+        upgrade?: string | undefined;
+        "upgrade-insecure-requests"?: string | undefined;
+        vary?: string | undefined;
+        via?: string | string[] | undefined;
+        warning?: string | undefined;
+        "www-authenticate"?: string | string[] | undefined;
+        "x-content-type-options"?: string | undefined;
+        "x-dns-prefetch-control"?: string | undefined;
+        "x-frame-options"?: string | undefined;
+        "x-xss-protection"?: string | undefined;
+    }
+    interface ClientRequestArgs extends Pick<LookupOptions, "hints"> {
+        _defaultAgent?: Agent | undefined;
+        agent?: Agent | boolean | undefined;
+        auth?: string | null | undefined;
+        createConnection?:
+            | ((
+                options: ClientRequestArgs,
+                oncreate: (err: Error | null, socket: stream.Duplex) => void,
+            ) => stream.Duplex | null | undefined)
+            | undefined;
+        defaultPort?: number | string | undefined;
+        family?: number | undefined;
+        headers?: OutgoingHttpHeaders | readonly string[] | undefined;
+        host?: string | null | undefined;
+        hostname?: string | null | undefined;
+        insecureHTTPParser?: boolean | undefined;
+        localAddress?: string | undefined;
+        localPort?: number | undefined;
+        lookup?: net.LookupFunction | undefined;
+        /**
+         * @default 16384
+         */
+        maxHeaderSize?: number | undefined;
+        method?: string | undefined;
+        path?: string | null | undefined;
+        port?: number | string | null | undefined;
+        protocol?: string | null | undefined;
+        setDefaultHeaders?: boolean | undefined;
+        setHost?: boolean | undefined;
+        signal?: AbortSignal | undefined;
+        socketPath?: string | undefined;
+        timeout?: number | undefined;
+        uniqueHeaders?: Array<string | string[]> | undefined;
+        joinDuplicateHeaders?: boolean | undefined;
+    }
+    interface ServerOptions<
+        Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Response extends typeof ServerResponse<InstanceType<Request>> = typeof ServerResponse,
+    > {
+        /**
+         * Specifies the `IncomingMessage` class to be used. Useful for extending the original `IncomingMessage`.
+         */
+        IncomingMessage?: Request | undefined;
+        /**
+         * Specifies the `ServerResponse` class to be used. Useful for extending the original `ServerResponse`.
+         */
+        ServerResponse?: Response | undefined;
+        /**
+         * Sets the timeout value in milliseconds for receiving the entire request from the client.
+         * @see Server.requestTimeout for more information.
+         * @default 300000
+         * @since v18.0.0
+         */
+        requestTimeout?: number | undefined;
+        /**
+         * It joins the field line values of multiple headers in a request with `, ` instead of discarding the duplicates.
+         * @default false
+         * @since v18.14.0
+         */
+        joinDuplicateHeaders?: boolean | undefined;
+        /**
+         * The number of milliseconds of inactivity a server needs to wait for additional incoming data,
+         * after it has finished writing the last response, before a socket will be destroyed.
+         * @see Server.keepAliveTimeout for more information.
+         * @default 5000
+         * @since v18.0.0
+         */
+        keepAliveTimeout?: number | undefined;
+        /**
+         * An additional buffer time added to the
+         * `server.keepAliveTimeout` to extend the internal socket timeout.
+         * @since 24.6.0
+         * @default 1000
+         */
+        keepAliveTimeoutBuffer?: number | undefined;
+        /**
+         * Sets the interval value in milliseconds to check for request and headers timeout in incomplete requests.
+         * @default 30000
+         */
+        connectionsCheckingInterval?: number | undefined;
+        /**
+         * Sets the timeout value in milliseconds for receiving the complete HTTP headers from the client.
+         * See {@link Server.headersTimeout} for more information.
+         * @default 60000
+         * @since 18.0.0
+         */
+        headersTimeout?: number | undefined;
+        /**
+         * Optionally overrides all `socket`s' `readableHighWaterMark` and `writableHighWaterMark`.
+         * This affects `highWaterMark` property of both `IncomingMessage` and `ServerResponse`.
+         * Default: @see stream.getDefaultHighWaterMark().
+         * @since v20.1.0
+         */
+        highWaterMark?: number | undefined;
+        /**
+         * Use an insecure HTTP parser that accepts invalid HTTP headers when `true`.
+         * Using the insecure parser should be avoided.
+         * See --insecure-http-parser for more information.
+         * @default false
+         */
+        insecureHTTPParser?: boolean | undefined;
+        /**
+         * Optionally overrides the value of `--max-http-header-size` for requests received by
+         * this server, i.e. the maximum length of request headers in bytes.
+         * @default 16384
+         * @since v13.3.0
+         */
+        maxHeaderSize?: number | undefined;
+        /**
+         * If set to `true`, it disables the use of Nagle's algorithm immediately after a new incoming connection is received.
+         * @default true
+         * @since v16.5.0
+         */
+        noDelay?: boolean | undefined;
+        /**
+         * If set to `true`, it forces the server to respond with a 400 (Bad Request) status code
+         * to any HTTP/1.1 request message that lacks a Host header (as mandated by the specification).
+         * @default true
+         * @since 20.0.0
+         */
+        requireHostHeader?: boolean | undefined;
+        /**
+         * If set to `true`, it enables keep-alive functionality on the socket immediately after a new incoming connection is received,
+         * similarly on what is done in `socket.setKeepAlive([enable][, initialDelay])`.
+         * @default false
+         * @since v16.5.0
+         */
+        keepAlive?: boolean | undefined;
+        /**
+         * If set to a positive number, it sets the initial delay before the first keepalive probe is sent on an idle socket.
+         * @default 0
+         * @since v16.5.0
+         */
+        keepAliveInitialDelay?: number | undefined;
+        /**
+         * A list of response headers that should be sent only once.
+         * If the header's value is an array, the items will be joined using `; `.
+         */
+        uniqueHeaders?: Array<string | string[]> | undefined;
+        /**
+         * A callback which receives an
+         * incoming request and returns a boolean, to control which upgrade attempts
+         * should be accepted. Accepted upgrades will fire an `'upgrade'` event (or
+         * their sockets will be destroyed, if no listener is registered) while
+         * rejected upgrades will fire a `'request'` event like any non-upgrade
+         * request.
+         * @since v24.9.0
+         * @default () => server.listenerCount('upgrade') > 0
+         */
+        shouldUpgradeCallback?: ((request: InstanceType<Request>) => boolean) | undefined;
+        /**
+         * If set to `true`, an error is thrown when writing to an HTTP response which does not have a body.
+         * @default false
+         * @since v18.17.0, v20.2.0
+         */
+        rejectNonStandardBodyWrites?: boolean | undefined;
+        /**
+         * If set to `true`, requests without `Content-Length`
+         * or `Transfer-Encoding` headers (indicating no body) will be initialized with an
+         * already-ended body stream, so they will never emit any stream events
+         * (like `'data'` or `'end'`). You can use `req.readableEnded` to detect this case.
+         * @since v25.1.0
+         * @default false
+         */
+        optimizeEmptyRequests?: boolean | undefined;
+    }
+    type RequestListener<
+        Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Response extends typeof ServerResponse<InstanceType<Request>> = typeof ServerResponse,
+    > = (request: InstanceType<Request>, response: InstanceType<Response> & { req: InstanceType<Request> }) => void;
+    interface ServerEventMap<
+        Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Response extends typeof ServerResponse<InstanceType<Request>> = typeof ServerResponse,
+    > extends net.ServerEventMap {
+        "checkContinue": Parameters<RequestListener<Request, Response>>;
+        "checkExpectation": Parameters<RequestListener<Request, Response>>;
+        "clientError": [exception: Error, socket: stream.Duplex];
+        "connect": [request: InstanceType<Request>, socket: stream.Duplex, head: NonSharedBuffer];
+        "connection": [socket: net.Socket];
+        "dropRequest": [request: InstanceType<Request>, socket: stream.Duplex];
+        "request": Parameters<RequestListener<Request, Response>>;
+        "upgrade": [req: InstanceType<Request>, socket: stream.Duplex, head: NonSharedBuffer];
+    }
+    /**
+     * @since v0.1.17
+     */
+    class Server<
+        Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Response extends typeof ServerResponse<InstanceType<Request>> = typeof ServerResponse,
+    > extends net.Server {
+        constructor(requestListener?: RequestListener<Request, Response>);
+        constructor(options: ServerOptions<Request, Response>, requestListener?: RequestListener<Request, Response>);
+        /**
+         * Sets the timeout value for sockets, and emits a `'timeout'` event on
+         * the Server object, passing the socket as an argument, if a timeout
+         * occurs.
+         *
+         * If there is a `'timeout'` event listener on the Server object, then it
+         * will be called with the timed-out socket as an argument.
+         *
+         * By default, the Server does not timeout sockets. However, if a callback
+         * is assigned to the Server's `'timeout'` event, timeouts must be handled
+         * explicitly.
+         * @since v0.9.12
+         * @param [msecs=0 (no timeout)]
+         */
+        setTimeout(msecs?: number, callback?: (socket: net.Socket) => void): this;
+        setTimeout(callback: (socket: net.Socket) => void): this;
+        /**
+         * Limits maximum incoming headers count. If set to 0, no limit will be applied.
+         * @since v0.7.0
+         */
+        maxHeadersCount: number | null;
+        /**
+         * The maximum number of requests socket can handle
+         * before closing keep alive connection.
+         *
+         * A value of `0` will disable the limit.
+         *
+         * When the limit is reached it will set the `Connection` header value to `close`,
+         * but will not actually close the connection, subsequent requests sent
+         * after the limit is reached will get `503 Service Unavailable` as a response.
+         * @since v16.10.0
+         */
+        maxRequestsPerSocket: number | null;
+        /**
+         * The number of milliseconds of inactivity before a socket is presumed
+         * to have timed out.
+         *
+         * A value of `0` will disable the timeout behavior on incoming connections.
+         *
+         * The socket timeout logic is set up on connection, so changing this
+         * value only affects new connections to the server, not any existing connections.
+         * @since v0.9.12
+         */
+        timeout: number;
+        /**
+         * Limit the amount of time the parser will wait to receive the complete HTTP
+         * headers.
+         *
+         * If the timeout expires, the server responds with status 408 without
+         * forwarding the request to the request listener and then closes the connection.
+         *
+         * It must be set to a non-zero value (e.g. 120 seconds) to protect against
+         * potential Denial-of-Service attacks in case the server is deployed without a
+         * reverse proxy in front.
+         * @since v11.3.0, v10.14.0
+         */
+        headersTimeout: number;
+        /**
+         * The number of milliseconds of inactivity a server needs to wait for additional
+         * incoming data, after it has finished writing the last response, before a socket
+         * will be destroyed.
+         *
+         * This timeout value is combined with the
+         * `server.keepAliveTimeoutBuffer` option to determine the actual socket
+         * timeout, calculated as:
+         * socketTimeout = keepAliveTimeout + keepAliveTimeoutBuffer
+         * If the server receives new data before the keep-alive timeout has fired, it
+         * will reset the regular inactivity timeout, i.e., `server.timeout`.
+         *
+         * A value of `0` will disable the keep-alive timeout behavior on incoming
+         * connections.
+         * A value of `0` makes the HTTP server behave similarly to Node.js versions prior
+         * to 8.0.0, which did not have a keep-alive timeout.
+         *
+         * The socket timeout logic is set up on connection, so changing this value only
+         * affects new connections to the server, not any existing connections.
+         * @since v8.0.0
+         */
+        keepAliveTimeout: number;
+        /**
+         * An additional buffer time added to the
+         * `server.keepAliveTimeout` to extend the internal socket timeout.
+         *
+         * This buffer helps reduce connection reset (`ECONNRESET`) errors by increasing
+         * the socket timeout slightly beyond the advertised keep-alive timeout.
+         *
+         * This option applies only to new incoming connections.
+         * @since v24.6.0
+         * @default 1000
+         */
+        keepAliveTimeoutBuffer: number;
+        /**
+         * Sets the timeout value in milliseconds for receiving the entire request from
+         * the client.
+         *
+         * If the timeout expires, the server responds with status 408 without
+         * forwarding the request to the request listener and then closes the connection.
+         *
+         * It must be set to a non-zero value (e.g. 120 seconds) to protect against
+         * potential Denial-of-Service attacks in case the server is deployed without a
+         * reverse proxy in front.
+         * @since v14.11.0
+         */
+        requestTimeout: number;
+        /**
+         * Closes all connections connected to this server.
+         * @since v18.2.0
+         */
+        closeAllConnections(): void;
+        /**
+         * Closes all connections connected to this server which are not sending a request
+         * or waiting for a response.
+         * @since v18.2.0
+         */
+        closeIdleConnections(): void;
+        // #region InternalEventEmitter
+        addListener<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof ServerEventMap>(eventName: E, ...args: ServerEventMap<Request, Response>[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener?: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof ServerEventMap>(
+            eventName: E,
+        ): ((...args: ServerEventMap<Request, Response>[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof ServerEventMap>(
+            eventName: E,
+        ): ((...args: ServerEventMap<Request, Response>[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof ServerEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface OutgoingMessageEventMap extends stream.WritableEventMap {
+        "prefinish": [];
+    }
+    /**
+     * This class serves as the parent class of {@link ClientRequest} and {@link ServerResponse}. It is an abstract outgoing message from
+     * the perspective of the participants of an HTTP transaction.
+     * @since v0.1.17
+     */
+    class OutgoingMessage<Request extends IncomingMessage = IncomingMessage> extends stream.Writable {
+        constructor();
+        readonly req: Request;
+        chunkedEncoding: boolean;
+        shouldKeepAlive: boolean;
+        useChunkedEncodingByDefault: boolean;
+        sendDate: boolean;
+        /**
+         * @deprecated Use `writableEnded` instead.
+         */
+        finished: boolean;
+        /**
+         * Read-only. `true` if the headers were sent, otherwise `false`.
+         * @since v0.9.3
+         */
+        readonly headersSent: boolean;
+        /**
+         * Alias of `outgoingMessage.socket`.
+         * @since v0.3.0
+         * @deprecated Since v15.12.0,v14.17.1 - Use `socket` instead.
+         */
+        readonly connection: net.Socket | null;
+        /**
+         * Reference to the underlying socket. Usually, users will not want to access
+         * this property.
+         *
+         * After calling `outgoingMessage.end()`, this property will be nulled.
+         * @since v0.3.0
+         */
+        readonly socket: net.Socket | null;
+        /**
+         * Once a socket is associated with the message and is connected, `socket.setTimeout()` will be called with `msecs` as the first parameter.
+         * @since v0.9.12
+         * @param callback Optional function to be called when a timeout occurs. Same as binding to the `timeout` event.
+         */
+        setTimeout(msecs: number, callback?: () => void): this;
+        /**
+         * Sets a single header value. If the header already exists in the to-be-sent
+         * headers, its value will be replaced. Use an array of strings to send multiple
+         * headers with the same name.
+         * @since v0.4.0
+         * @param name Header name
+         * @param value Header value
+         */
+        setHeader(name: string, value: number | string | readonly string[]): this;
+        /**
+         * Sets multiple header values for implicit headers. headers must be an instance of
+         * `Headers` or `Map`, if a header already exists in the to-be-sent headers, its
+         * value will be replaced.
+         *
+         * ```js
+         * const headers = new Headers({ foo: 'bar' });
+         * outgoingMessage.setHeaders(headers);
+         * ```
+         *
+         * or
+         *
+         * ```js
+         * const headers = new Map([['foo', 'bar']]);
+         * outgoingMessage.setHeaders(headers);
+         * ```
+         *
+         * When headers have been set with `outgoingMessage.setHeaders()`, they will be
+         * merged with any headers passed to `response.writeHead()`, with the headers passed
+         * to `response.writeHead()` given precedence.
+         *
+         * ```js
+         * // Returns content-type = text/plain
+         * const server = http.createServer((req, res) => {
+         *   const headers = new Headers({ 'Content-Type': 'text/html' });
+         *   res.setHeaders(headers);
+         *   res.writeHead(200, { 'Content-Type': 'text/plain' });
+         *   res.end('ok');
+         * });
+         * ```
+         *
+         * @since v19.6.0, v18.15.0
+         * @param name Header name
+         * @param value Header value
+         */
+        setHeaders(headers: Headers | Map<string, number | string | readonly string[]>): this;
+        /**
+         * Append a single header value to the header object.
+         *
+         * If the value is an array, this is equivalent to calling this method multiple
+         * times.
+         *
+         * If there were no previous values for the header, this is equivalent to calling `outgoingMessage.setHeader(name, value)`.
+         *
+         * Depending of the value of `options.uniqueHeaders` when the client request or the
+         * server were created, this will end up in the header being sent multiple times or
+         * a single time with values joined using `; `.
+         * @since v18.3.0, v16.17.0
+         * @param name Header name
+         * @param value Header value
+         */
+        appendHeader(name: string, value: string | readonly string[]): this;
+        /**
+         * Gets the value of the HTTP header with the given name. If that header is not
+         * set, the returned value will be `undefined`.
+         * @since v0.4.0
+         * @param name Name of header
+         */
+        getHeader(name: string): number | string | string[] | undefined;
+        /**
+         * Returns a shallow copy of the current outgoing headers. Since a shallow
+         * copy is used, array values may be mutated without additional calls to
+         * various header-related HTTP module methods. The keys of the returned
+         * object are the header names and the values are the respective header
+         * values. All header names are lowercase.
+         *
+         * The object returned by the `outgoingMessage.getHeaders()` method does
+         * not prototypically inherit from the JavaScript `Object`. This means that
+         * typical `Object` methods such as `obj.toString()`, `obj.hasOwnProperty()`,
+         * and others are not defined and will not work.
+         *
+         * ```js
+         * outgoingMessage.setHeader('Foo', 'bar');
+         * outgoingMessage.setHeader('Set-Cookie', ['foo=bar', 'bar=baz']);
+         *
+         * const headers = outgoingMessage.getHeaders();
+         * // headers === { foo: 'bar', 'set-cookie': ['foo=bar', 'bar=baz'] }
+         * ```
+         * @since v7.7.0
+         */
+        getHeaders(): OutgoingHttpHeaders;
+        /**
+         * Returns an array containing the unique names of the current outgoing headers.
+         * All names are lowercase.
+         * @since v7.7.0
+         */
+        getHeaderNames(): string[];
+        /**
+         * Returns `true` if the header identified by `name` is currently set in the
+         * outgoing headers. The header name is case-insensitive.
+         *
+         * ```js
+         * const hasContentType = outgoingMessage.hasHeader('content-type');
+         * ```
+         * @since v7.7.0
+         */
+        hasHeader(name: string): boolean;
+        /**
+         * Removes a header that is queued for implicit sending.
+         *
+         * ```js
+         * outgoingMessage.removeHeader('Content-Encoding');
+         * ```
+         * @since v0.4.0
+         * @param name Header name
+         */
+        removeHeader(name: string): void;
+        /**
+         * Adds HTTP trailers (headers but at the end of the message) to the message.
+         *
+         * Trailers will **only** be emitted if the message is chunked encoded. If not,
+         * the trailers will be silently discarded.
+         *
+         * HTTP requires the `Trailer` header to be sent to emit trailers,
+         * with a list of header field names in its value, e.g.
+         *
+         * ```js
+         * message.writeHead(200, { 'Content-Type': 'text/plain',
+         *                          'Trailer': 'Content-MD5' });
+         * message.write(fileData);
+         * message.addTrailers({ 'Content-MD5': '7895bf4b8828b55ceaf47747b4bca667' });
+         * message.end();
+         * ```
+         *
+         * Attempting to set a header field name or value that contains invalid characters
+         * will result in a `TypeError` being thrown.
+         * @since v0.3.0
+         */
+        addTrailers(headers: OutgoingHttpHeaders | ReadonlyArray<[string, string]>): void;
+        /**
+         * Flushes the message headers.
+         *
+         * For efficiency reason, Node.js normally buffers the message headers
+         * until `outgoingMessage.end()` is called or the first chunk of message data
+         * is written. It then tries to pack the headers and data into a single TCP
+         * packet.
+         *
+         * It is usually desired (it saves a TCP round-trip), but not when the first
+         * data is not sent until possibly much later. `outgoingMessage.flushHeaders()` bypasses the optimization and kickstarts the message.
+         * @since v1.6.0
+         */
+        flushHeaders(): void;
+        // #region InternalEventEmitter
+        addListener<E extends keyof OutgoingMessageEventMap>(
+            eventName: E,
+            listener: (...args: OutgoingMessageEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof OutgoingMessageEventMap>(eventName: E, ...args: OutgoingMessageEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof OutgoingMessageEventMap>(
+            eventName: E,
+            listener?: (...args: OutgoingMessageEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof OutgoingMessageEventMap>(
+            eventName: E,
+        ): ((...args: OutgoingMessageEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof OutgoingMessageEventMap>(
+            eventName: E,
+            listener: (...args: OutgoingMessageEventMap[E]) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof OutgoingMessageEventMap>(
+            eventName: E,
+            listener: (...args: OutgoingMessageEventMap[E]) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof OutgoingMessageEventMap>(
+            eventName: E,
+            listener: (...args: OutgoingMessageEventMap[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof OutgoingMessageEventMap>(
+            eventName: E,
+            listener: (...args: OutgoingMessageEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof OutgoingMessageEventMap>(
+            eventName: E,
+            listener: (...args: OutgoingMessageEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof OutgoingMessageEventMap>(
+            eventName: E,
+        ): ((...args: OutgoingMessageEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof OutgoingMessageEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof OutgoingMessageEventMap>(
+            eventName: E,
+            listener: (...args: OutgoingMessageEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    /**
+     * This object is created internally by an HTTP server, not by the user. It is
+     * passed as the second parameter to the `'request'` event.
+     * @since v0.1.17
+     */
+    class ServerResponse<Request extends IncomingMessage = IncomingMessage> extends OutgoingMessage<Request> {
+        /**
+         * When using implicit headers (not calling `response.writeHead()` explicitly),
+         * this property controls the status code that will be sent to the client when
+         * the headers get flushed.
+         *
+         * ```js
+         * response.statusCode = 404;
+         * ```
+         *
+         * After response header was sent to the client, this property indicates the
+         * status code which was sent out.
+         * @since v0.4.0
+         */
+        statusCode: number;
+        /**
+         * When using implicit headers (not calling `response.writeHead()` explicitly),
+         * this property controls the status message that will be sent to the client when
+         * the headers get flushed. If this is left as `undefined` then the standard
+         * message for the status code will be used.
+         *
+         * ```js
+         * response.statusMessage = 'Not found';
+         * ```
+         *
+         * After response header was sent to the client, this property indicates the
+         * status message which was sent out.
+         * @since v0.11.8
+         */
+        statusMessage: string;
+        /**
+         * If set to `true`, Node.js will check whether the `Content-Length` header value and the size of the body, in bytes, are equal.
+         * Mismatching the `Content-Length` header value will result
+         * in an `Error` being thrown, identified by `code:``'ERR_HTTP_CONTENT_LENGTH_MISMATCH'`.
+         * @since v18.10.0, v16.18.0
+         */
+        strictContentLength: boolean;
+        constructor(req: Request);
+        assignSocket(socket: net.Socket): void;
+        detachSocket(socket: net.Socket): void;
+        /**
+         * Sends an HTTP/1.1 100 Continue message to the client, indicating that
+         * the request body should be sent. See the `'checkContinue'` event on `Server`.
+         * @since v0.3.0
+         */
+        writeContinue(callback?: () => void): void;
+        /**
+         * Sends an HTTP/1.1 103 Early Hints message to the client with a Link header,
+         * indicating that the user agent can preload/preconnect the linked resources.
+         * The `hints` is an object containing the values of headers to be sent with
+         * early hints message. The optional `callback` argument will be called when
+         * the response message has been written.
+         *
+         * **Example**
+         *
+         * ```js
+         * const earlyHintsLink = '</styles.css>; rel=preload; as=style';
+         * response.writeEarlyHints({
+         *   'link': earlyHintsLink,
+         * });
+         *
+         * const earlyHintsLinks = [
+         *   '</styles.css>; rel=preload; as=style',
+         *   '</scripts.js>; rel=preload; as=script',
+         * ];
+         * response.writeEarlyHints({
+         *   'link': earlyHintsLinks,
+         *   'x-trace-id': 'id for diagnostics',
+         * });
+         *
+         * const earlyHintsCallback = () => console.log('early hints message sent');
+         * response.writeEarlyHints({
+         *   'link': earlyHintsLinks,
+         * }, earlyHintsCallback);
+         * ```
+         * @since v18.11.0
+         * @param hints An object containing the values of headers
+         * @param callback Will be called when the response message has been written
+         */
+        writeEarlyHints(hints: Record<string, string | string[]>, callback?: () => void): void;
+        /**
+         * Sends a response header to the request. The status code is a 3-digit HTTP
+         * status code, like `404`. The last argument, `headers`, are the response headers.
+         * Optionally one can give a human-readable `statusMessage` as the second
+         * argument.
+         *
+         * `headers` may be an `Array` where the keys and values are in the same list.
+         * It is _not_ a list of tuples. So, the even-numbered offsets are key values,
+         * and the odd-numbered offsets are the associated values. The array is in the same
+         * format as `request.rawHeaders`.
+         *
+         * Returns a reference to the `ServerResponse`, so that calls can be chained.
+         *
+         * ```js
+         * const body = 'hello world';
+         * response
+         *   .writeHead(200, {
+         *     'Content-Length': Buffer.byteLength(body),
+         *     'Content-Type': 'text/plain',
+         *   })
+         *   .end(body);
+         * ```
+         *
+         * This method must only be called once on a message and it must
+         * be called before `response.end()` is called.
+         *
+         * If `response.write()` or `response.end()` are called before calling
+         * this, the implicit/mutable headers will be calculated and call this function.
+         *
+         * When headers have been set with `response.setHeader()`, they will be merged
+         * with any headers passed to `response.writeHead()`, with the headers passed
+         * to `response.writeHead()` given precedence.
+         *
+         * If this method is called and `response.setHeader()` has not been called,
+         * it will directly write the supplied header values onto the network channel
+         * without caching internally, and the `response.getHeader()` on the header
+         * will not yield the expected result. If progressive population of headers is
+         * desired with potential future retrieval and modification, use `response.setHeader()` instead.
+         *
+         * ```js
+         * // Returns content-type = text/plain
+         * const server = http.createServer((req, res) => {
+         *   res.setHeader('Content-Type', 'text/html');
+         *   res.setHeader('X-Foo', 'bar');
+         *   res.writeHead(200, { 'Content-Type': 'text/plain' });
+         *   res.end('ok');
+         * });
+         * ```
+         *
+         * `Content-Length` is read in bytes, not characters. Use `Buffer.byteLength()` to determine the length of the body in bytes. Node.js
+         * will check whether `Content-Length` and the length of the body which has
+         * been transmitted are equal or not.
+         *
+         * Attempting to set a header field name or value that contains invalid characters
+         * will result in a `Error` being thrown.
+         * @since v0.1.30
+         */
+        writeHead(
+            statusCode: number,
+            statusMessage?: string,
+            headers?: OutgoingHttpHeaders | OutgoingHttpHeader[],
+        ): this;
+        writeHead(statusCode: number, headers?: OutgoingHttpHeaders | OutgoingHttpHeader[]): this;
+        /**
+         * Sends a HTTP/1.1 102 Processing message to the client, indicating that
+         * the request body should be sent.
+         * @since v10.0.0
+         */
+        writeProcessing(callback?: () => void): void;
+    }
+    interface InformationEvent {
+        httpVersion: string;
+        httpVersionMajor: number;
+        httpVersionMinor: number;
+        statusCode: number;
+        statusMessage: string;
+        headers: IncomingHttpHeaders;
+        rawHeaders: string[];
+    }
+    interface ClientRequestEventMap extends stream.WritableEventMap {
+        /** @deprecated Listen for the `'close'` event instead. */
+        "abort": [];
+        "connect": [response: IncomingMessage, socket: net.Socket, head: NonSharedBuffer];
+        "continue": [];
+        "information": [info: InformationEvent];
+        "response": [response: IncomingMessage];
+        "socket": [socket: net.Socket];
+        "timeout": [];
+        "upgrade": [response: IncomingMessage, socket: net.Socket, head: NonSharedBuffer];
+    }
+    /**
+     * This object is created internally and returned from {@link request}. It
+     * represents an _in-progress_ request whose header has already been queued. The
+     * header is still mutable using the `setHeader(name, value)`, `getHeader(name)`, `removeHeader(name)` API. The actual header will
+     * be sent along with the first data chunk or when calling `request.end()`.
+     *
+     * To get the response, add a listener for `'response'` to the request object. `'response'` will be emitted from the request object when the response
+     * headers have been received. The `'response'` event is executed with one
+     * argument which is an instance of {@link IncomingMessage}.
+     *
+     * During the `'response'` event, one can add listeners to the
+     * response object; particularly to listen for the `'data'` event.
+     *
+     * If no `'response'` handler is added, then the response will be
+     * entirely discarded. However, if a `'response'` event handler is added,
+     * then the data from the response object **must** be consumed, either by
+     * calling `response.read()` whenever there is a `'readable'` event, or
+     * by adding a `'data'` handler, or by calling the `.resume()` method.
+     * Until the data is consumed, the `'end'` event will not fire. Also, until
+     * the data is read it will consume memory that can eventually lead to a
+     * 'process out of memory' error.
+     *
+     * For backward compatibility, `res` will only emit `'error'` if there is an `'error'` listener registered.
+     *
+     * Set `Content-Length` header to limit the response body size.
+     * If `response.strictContentLength` is set to `true`, mismatching the `Content-Length` header value will result in an `Error` being thrown,
+     * identified by `code:``'ERR_HTTP_CONTENT_LENGTH_MISMATCH'`.
+     *
+     * `Content-Length` value should be in bytes, not characters. Use `Buffer.byteLength()` to determine the length of the body in bytes.
+     * @since v0.1.17
+     */
+    class ClientRequest extends OutgoingMessage {
+        /**
+         * The `request.aborted` property will be `true` if the request has
+         * been aborted.
+         * @since v0.11.14
+         * @deprecated Since v17.0.0, v16.12.0 - Check `destroyed` instead.
+         */
+        aborted: boolean;
+        /**
+         * The request host.
+         * @since v14.5.0, v12.19.0
+         */
+        host: string;
+        /**
+         * The request protocol.
+         * @since v14.5.0, v12.19.0
+         */
+        protocol: string;
+        /**
+         * When sending request through a keep-alive enabled agent, the underlying socket
+         * might be reused. But if server closes connection at unfortunate time, client
+         * may run into a 'ECONNRESET' error.
+         *
+         * ```js
+         * import http from 'node:http';
+         * const agent = new http.Agent({ keepAlive: true });
+         *
+         * // Server has a 5 seconds keep-alive timeout by default
+         * http
+         *   .createServer((req, res) => {
+         *     res.write('hello\n');
+         *     res.end();
+         *   })
+         *   .listen(3000);
+         *
+         * setInterval(() => {
+         *   // Adapting a keep-alive agent
+         *   http.get('http://localhost:3000', { agent }, (res) => {
+         *     res.on('data', (data) => {
+         *       // Do nothing
+         *     });
+         *   });
+         * }, 5000); // Sending request on 5s interval so it's easy to hit idle timeout
+         * ```
+         *
+         * By marking a request whether it reused socket or not, we can do
+         * automatic error retry base on it.
+         *
+         * ```js
+         * import http from 'node:http';
+         * const agent = new http.Agent({ keepAlive: true });
+         *
+         * function retriableRequest() {
+         *   const req = http
+         *     .get('http://localhost:3000', { agent }, (res) => {
+         *       // ...
+         *     })
+         *     .on('error', (err) => {
+         *       // Check if retry is needed
+         *       if (req.reusedSocket &#x26;&#x26; err.code === 'ECONNRESET') {
+         *         retriableRequest();
+         *       }
+         *     });
+         * }
+         *
+         * retriableRequest();
+         * ```
+         * @since v13.0.0, v12.16.0
+         */
+        reusedSocket: boolean;
+        /**
+         * Limits maximum response headers count. If set to 0, no limit will be applied.
+         */
+        maxHeadersCount: number;
+        constructor(url: string | URL | ClientRequestArgs, cb?: (res: IncomingMessage) => void);
+        /**
+         * The request method.
+         * @since v0.1.97
+         */
+        method: string;
+        /**
+         * The request path.
+         * @since v0.4.0
+         */
+        path: string;
+        /**
+         * Marks the request as aborting. Calling this will cause remaining data
+         * in the response to be dropped and the socket to be destroyed.
+         * @since v0.3.8
+         * @deprecated Since v14.1.0,v13.14.0 - Use `destroy` instead.
+         */
+        abort(): void;
+        onSocket(socket: net.Socket): void;
+        /**
+         * Once a socket is assigned to this request and is connected `socket.setTimeout()` will be called.
+         * @since v0.5.9
+         * @param timeout Milliseconds before a request times out.
+         * @param callback Optional function to be called when a timeout occurs. Same as binding to the `'timeout'` event.
+         */
+        setTimeout(timeout: number, callback?: () => void): this;
+        /**
+         * Once a socket is assigned to this request and is connected `socket.setNoDelay()` will be called.
+         * @since v0.5.9
+         */
+        setNoDelay(noDelay?: boolean): void;
+        /**
+         * Once a socket is assigned to this request and is connected `socket.setKeepAlive()` will be called.
+         * @since v0.5.9
+         */
+        setSocketKeepAlive(enable?: boolean, initialDelay?: number): void;
+        /**
+         * Returns an array containing the unique names of the current outgoing raw
+         * headers. Header names are returned with their exact casing being set.
+         *
+         * ```js
+         * request.setHeader('Foo', 'bar');
+         * request.setHeader('Set-Cookie', ['foo=bar', 'bar=baz']);
+         *
+         * const headerNames = request.getRawHeaderNames();
+         * // headerNames === ['Foo', 'Set-Cookie']
+         * ```
+         * @since v15.13.0, v14.17.0
+         */
+        getRawHeaderNames(): string[];
+        // #region InternalEventEmitter
+        addListener<E extends keyof ClientRequestEventMap>(
+            eventName: E,
+            listener: (...args: ClientRequestEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof ClientRequestEventMap>(eventName: E, ...args: ClientRequestEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof ClientRequestEventMap>(
+            eventName: E,
+            listener?: (...args: ClientRequestEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof ClientRequestEventMap>(eventName: E): ((...args: ClientRequestEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof ClientRequestEventMap>(
+            eventName: E,
+            listener: (...args: ClientRequestEventMap[E]) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof ClientRequestEventMap>(
+            eventName: E,
+            listener: (...args: ClientRequestEventMap[E]) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof ClientRequestEventMap>(
+            eventName: E,
+            listener: (...args: ClientRequestEventMap[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof ClientRequestEventMap>(
+            eventName: E,
+            listener: (...args: ClientRequestEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof ClientRequestEventMap>(
+            eventName: E,
+            listener: (...args: ClientRequestEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof ClientRequestEventMap>(
+            eventName: E,
+        ): ((...args: ClientRequestEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof ClientRequestEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof ClientRequestEventMap>(
+            eventName: E,
+            listener: (...args: ClientRequestEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface IncomingMessageEventMap extends stream.ReadableEventMap {
+        /** @deprecated Listen for `'close'` event instead. */
+        "aborted": [];
+    }
+    /**
+     * An `IncomingMessage` object is created by {@link Server} or {@link ClientRequest} and passed as the first argument to the `'request'` and `'response'` event respectively. It may be used to
+     * access response
+     * status, headers, and data.
+     *
+     * Different from its `socket` value which is a subclass of `stream.Duplex`, the `IncomingMessage` itself extends `stream.Readable` and is created separately to
+     * parse and emit the incoming HTTP headers and payload, as the underlying socket
+     * may be reused multiple times in case of keep-alive.
+     * @since v0.1.17
+     */
+    class IncomingMessage extends stream.Readable {
+        constructor(socket: net.Socket);
+        /**
+         * The `message.aborted` property will be `true` if the request has
+         * been aborted.
+         * @since v10.1.0
+         * @deprecated Since v17.0.0,v16.12.0 - Check `message.destroyed` from <a href="stream.html#class-streamreadable" class="type">stream.Readable</a>.
+         */
+        aborted: boolean;
+        /**
+         * In case of server request, the HTTP version sent by the client. In the case of
+         * client response, the HTTP version of the connected-to server.
+         * Probably either `'1.1'` or `'1.0'`.
+         *
+         * Also `message.httpVersionMajor` is the first integer and `message.httpVersionMinor` is the second.
+         * @since v0.1.1
+         */
+        httpVersion: string;
+        httpVersionMajor: number;
+        httpVersionMinor: number;
+        /**
+         * The `message.complete` property will be `true` if a complete HTTP message has
+         * been received and successfully parsed.
+         *
+         * This property is particularly useful as a means of determining if a client or
+         * server fully transmitted a message before a connection was terminated:
+         *
+         * ```js
+         * const req = http.request({
+         *   host: '127.0.0.1',
+         *   port: 8080,
+         *   method: 'POST',
+         * }, (res) => {
+         *   res.resume();
+         *   res.on('end', () => {
+         *     if (!res.complete)
+         *       console.error(
+         *         'The connection was terminated while the message was still being sent');
+         *   });
+         * });
+         * ```
+         * @since v0.3.0
+         */
+        complete: boolean;
+        /**
+         * Alias for `message.socket`.
+         * @since v0.1.90
+         * @deprecated Since v16.0.0 - Use `socket`.
+         */
+        connection: net.Socket;
+        /**
+         * The `net.Socket` object associated with the connection.
+         *
+         * With HTTPS support, use `request.socket.getPeerCertificate()` to obtain the
+         * client's authentication details.
+         *
+         * This property is guaranteed to be an instance of the `net.Socket` class,
+         * a subclass of `stream.Duplex`, unless the user specified a socket
+         * type other than `net.Socket` or internally nulled.
+         * @since v0.3.0
+         */
+        socket: net.Socket;
+        /**
+         * The request/response headers object.
+         *
+         * Key-value pairs of header names and values. Header names are lower-cased.
+         *
+         * ```js
+         * // Prints something like:
+         * //
+         * // { 'user-agent': 'curl/7.22.0',
+         * //   host: '127.0.0.1:8000',
+         * //   accept: '*' }
+         * console.log(request.headers);
+         * ```
+         *
+         * Duplicates in raw headers are handled in the following ways, depending on the
+         * header name:
+         *
+         * * Duplicates of `age`, `authorization`, `content-length`, `content-type`, `etag`, `expires`, `from`, `host`, `if-modified-since`, `if-unmodified-since`, `last-modified`, `location`,
+         * `max-forwards`, `proxy-authorization`, `referer`, `retry-after`, `server`, or `user-agent` are discarded.
+         * To allow duplicate values of the headers listed above to be joined,
+         * use the option `joinDuplicateHeaders` in {@link request} and {@link createServer}. See RFC 9110 Section 5.3 for more
+         * information.
+         * * `set-cookie` is always an array. Duplicates are added to the array.
+         * * For duplicate `cookie` headers, the values are joined together with `; `.
+         * * For all other headers, the values are joined together with `, `.
+         * @since v0.1.5
+         */
+        headers: IncomingHttpHeaders;
+        /**
+         * Similar to `message.headers`, but there is no join logic and the values are
+         * always arrays of strings, even for headers received just once.
+         *
+         * ```js
+         * // Prints something like:
+         * //
+         * // { 'user-agent': ['curl/7.22.0'],
+         * //   host: ['127.0.0.1:8000'],
+         * //   accept: ['*'] }
+         * console.log(request.headersDistinct);
+         * ```
+         * @since v18.3.0, v16.17.0
+         */
+        headersDistinct: NodeJS.Dict<string[]>;
+        /**
+         * The raw request/response headers list exactly as they were received.
+         *
+         * The keys and values are in the same list. It is _not_ a
+         * list of tuples. So, the even-numbered offsets are key values, and the
+         * odd-numbered offsets are the associated values.
+         *
+         * Header names are not lowercased, and duplicates are not merged.
+         *
+         * ```js
+         * // Prints something like:
+         * //
+         * // [ 'user-agent',
+         * //   'this is invalid because there can be only one',
+         * //   'User-Agent',
+         * //   'curl/7.22.0',
+         * //   'Host',
+         * //   '127.0.0.1:8000',
+         * //   'ACCEPT',
+         * //   '*' ]
+         * console.log(request.rawHeaders);
+         * ```
+         * @since v0.11.6
+         */
+        rawHeaders: string[];
+        /**
+         * The request/response trailers object. Only populated at the `'end'` event.
+         * @since v0.3.0
+         */
+        trailers: NodeJS.Dict<string>;
+        /**
+         * Similar to `message.trailers`, but there is no join logic and the values are
+         * always arrays of strings, even for headers received just once.
+         * Only populated at the `'end'` event.
+         * @since v18.3.0, v16.17.0
+         */
+        trailersDistinct: NodeJS.Dict<string[]>;
+        /**
+         * The raw request/response trailer keys and values exactly as they were
+         * received. Only populated at the `'end'` event.
+         * @since v0.11.6
+         */
+        rawTrailers: string[];
+        /**
+         * Calls `message.socket.setTimeout(msecs, callback)`.
+         * @since v0.5.9
+         */
+        setTimeout(msecs: number, callback?: () => void): this;
+        /**
+         * **Only valid for request obtained from {@link Server}.**
+         *
+         * The request method as a string. Read only. Examples: `'GET'`, `'DELETE'`.
+         * @since v0.1.1
+         */
+        method?: string | undefined;
+        /**
+         * **Only valid for request obtained from {@link Server}.**
+         *
+         * Request URL string. This contains only the URL that is present in the actual
+         * HTTP request. Take the following request:
+         *
+         * ```http
+         * GET /status?name=ryan HTTP/1.1
+         * Accept: text/plain
+         * ```
+         *
+         * To parse the URL into its parts:
+         *
+         * ```js
+         * new URL(`http://${process.env.HOST ?? 'localhost'}${request.url}`);
+         * ```
+         *
+         * When `request.url` is `'/status?name=ryan'` and `process.env.HOST` is undefined:
+         *
+         * ```console
+         * $ node
+         * > new URL(`http://${process.env.HOST ?? 'localhost'}${request.url}`);
+         * URL {
+         *   href: 'http://localhost/status?name=ryan',
+         *   origin: 'http://localhost',
+         *   protocol: 'http:',
+         *   username: '',
+         *   password: '',
+         *   host: 'localhost',
+         *   hostname: 'localhost',
+         *   port: '',
+         *   pathname: '/status',
+         *   search: '?name=ryan',
+         *   searchParams: URLSearchParams { 'name' => 'ryan' },
+         *   hash: ''
+         * }
+         * ```
+         *
+         * Ensure that you set `process.env.HOST` to the server's host name, or consider replacing this part entirely. If using `req.headers.host`, ensure proper
+         * validation is used, as clients may specify a custom `Host` header.
+         * @since v0.1.90
+         */
+        url?: string | undefined;
+        /**
+         * **Only valid for response obtained from {@link ClientRequest}.**
+         *
+         * The 3-digit HTTP response status code. E.G. `404`.
+         * @since v0.1.1
+         */
+        statusCode?: number | undefined;
+        /**
+         * **Only valid for response obtained from {@link ClientRequest}.**
+         *
+         * The HTTP response status message (reason phrase). E.G. `OK` or `Internal Server Error`.
+         * @since v0.11.10
+         */
+        statusMessage?: string | undefined;
+        /**
+         * Calls `destroy()` on the socket that received the `IncomingMessage`. If `error` is provided, an `'error'` event is emitted on the socket and `error` is passed
+         * as an argument to any listeners on the event.
+         * @since v0.3.0
+         */
+        destroy(error?: Error): this;
+        // #region InternalEventEmitter
+        addListener<E extends keyof IncomingMessageEventMap>(
+            eventName: E,
+            listener: (...args: IncomingMessageEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof IncomingMessageEventMap>(eventName: E, ...args: IncomingMessageEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof IncomingMessageEventMap>(
+            eventName: E,
+            listener?: (...args: IncomingMessageEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof IncomingMessageEventMap>(
+            eventName: E,
+        ): ((...args: IncomingMessageEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof IncomingMessageEventMap>(
+            eventName: E,
+            listener: (...args: IncomingMessageEventMap[E]) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof IncomingMessageEventMap>(
+            eventName: E,
+            listener: (...args: IncomingMessageEventMap[E]) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof IncomingMessageEventMap>(
+            eventName: E,
+            listener: (...args: IncomingMessageEventMap[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof IncomingMessageEventMap>(
+            eventName: E,
+            listener: (...args: IncomingMessageEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof IncomingMessageEventMap>(
+            eventName: E,
+            listener: (...args: IncomingMessageEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof IncomingMessageEventMap>(
+            eventName: E,
+        ): ((...args: IncomingMessageEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof IncomingMessageEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof IncomingMessageEventMap>(
+            eventName: E,
+            listener: (...args: IncomingMessageEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface ProxyEnv extends NodeJS.ProcessEnv {
+        HTTP_PROXY?: string | undefined;
+        HTTPS_PROXY?: string | undefined;
+        NO_PROXY?: string | undefined;
+        http_proxy?: string | undefined;
+        https_proxy?: string | undefined;
+        no_proxy?: string | undefined;
+    }
+    interface AgentOptions extends NodeJS.PartialOptions<net.TcpSocketConnectOpts> {
+        /**
+         * Keep sockets around in a pool to be used by other requests in the future. Default = false
+         */
+        keepAlive?: boolean | undefined;
+        /**
+         * When using HTTP KeepAlive, how often to send TCP KeepAlive packets over sockets being kept alive. Default = 1000.
+         * Only relevant if keepAlive is set to true.
+         */
+        keepAliveMsecs?: number | undefined;
+        /**
+         * Milliseconds to subtract from
+         * the server-provided `keep-alive: timeout=...` hint when determining socket
+         * expiration time. This buffer helps ensure the agent closes the socket
+         * slightly before the server does, reducing the chance of sending a request
+         * on a socket that’s about to be closed by the server.
+         * @since v24.7.0
+         * @default 1000
+         */
+        agentKeepAliveTimeoutBuffer?: number | undefined;
+        /**
+         * Maximum number of sockets to allow per host. Default for Node 0.10 is 5, default for Node 0.12 is Infinity
+         */
+        maxSockets?: number | undefined;
+        /**
+         * Maximum number of sockets allowed for all hosts in total. Each request will use a new socket until the maximum is reached. Default: Infinity.
+         */
+        maxTotalSockets?: number | undefined;
+        /**
+         * Maximum number of sockets to leave open in a free state. Only relevant if keepAlive is set to true. Default = 256.
+         */
+        maxFreeSockets?: number | undefined;
+        /**
+         * Socket timeout in milliseconds. This will set the timeout after the socket is connected.
+         */
+        timeout?: number | undefined;
+        /**
+         * Scheduling strategy to apply when picking the next free socket to use.
+         * @default `lifo`
+         */
+        scheduling?: "fifo" | "lifo" | undefined;
+        /**
+         * Environment variables for proxy configuration. See
+         * [Built-in Proxy Support](https://nodejs.org/docs/latest-v25.x/api/http.html#built-in-proxy-support) for details.
+         * @since v24.5.0
+         */
+        proxyEnv?: ProxyEnv | undefined;
+        /**
+         * Default port to use when the port is not specified in requests.
+         * @since v24.5.0
+         */
+        defaultPort?: number | undefined;
+        /**
+         * The protocol to use for the agent.
+         * @since v24.5.0
+         */
+        protocol?: string | undefined;
+    }
+    /**
+     * An `Agent` is responsible for managing connection persistence
+     * and reuse for HTTP clients. It maintains a queue of pending requests
+     * for a given host and port, reusing a single socket connection for each
+     * until the queue is empty, at which time the socket is either destroyed
+     * or put into a pool where it is kept to be used again for requests to the
+     * same host and port. Whether it is destroyed or pooled depends on the `keepAlive` `option`.
+     *
+     * Pooled connections have TCP Keep-Alive enabled for them, but servers may
+     * still close idle connections, in which case they will be removed from the
+     * pool and a new connection will be made when a new HTTP request is made for
+     * that host and port. Servers may also refuse to allow multiple requests
+     * over the same connection, in which case the connection will have to be
+     * remade for every request and cannot be pooled. The `Agent` will still make
+     * the requests to that server, but each one will occur over a new connection.
+     *
+     * When a connection is closed by the client or the server, it is removed
+     * from the pool. Any unused sockets in the pool will be unrefed so as not
+     * to keep the Node.js process running when there are no outstanding requests.
+     * (see `socket.unref()`).
+     *
+     * It is good practice, to `destroy()` an `Agent` instance when it is no
+     * longer in use, because unused sockets consume OS resources.
+     *
+     * Sockets are removed from an agent when the socket emits either
+     * a `'close'` event or an `'agentRemove'` event. When intending to keep one
+     * HTTP request open for a long time without keeping it in the agent, something
+     * like the following may be done:
+     *
+     * ```js
+     * http.get(options, (res) => {
+     *   // Do stuff
+     * }).on('socket', (socket) => {
+     *   socket.emit('agentRemove');
+     * });
+     * ```
+     *
+     * An agent may also be used for an individual request. By providing `{agent: false}` as an option to the `http.get()` or `http.request()` functions, a one-time use `Agent` with default options
+     * will be used
+     * for the client connection.
+     *
+     * `agent:false`:
+     *
+     * ```js
+     * http.get({
+     *   hostname: 'localhost',
+     *   port: 80,
+     *   path: '/',
+     *   agent: false,  // Create a new agent just for this one request
+     * }, (res) => {
+     *   // Do stuff with response
+     * });
+     * ```
+     *
+     * `options` in [`socket.connect()`](https://nodejs.org/docs/latest-v25.x/api/net.html#socketconnectoptions-connectlistener) are also supported.
+     *
+     * To configure any of them, a custom {@link Agent} instance must be created.
+     *
+     * ```js
+     * import http from 'node:http';
+     * const keepAliveAgent = new http.Agent({ keepAlive: true });
+     * options.agent = keepAliveAgent;
+     * http.request(options, onResponseCallback)
+     * ```
+     * @since v0.3.4
+     */
+    class Agent extends EventEmitter {
+        /**
+         * By default set to 256. For agents with `keepAlive` enabled, this
+         * sets the maximum number of sockets that will be left open in the free
+         * state.
+         * @since v0.11.7
+         */
+        maxFreeSockets: number;
+        /**
+         * By default set to `Infinity`. Determines how many concurrent sockets the agent
+         * can have open per origin. Origin is the returned value of `agent.getName()`.
+         * @since v0.3.6
+         */
+        maxSockets: number;
+        /**
+         * By default set to `Infinity`. Determines how many concurrent sockets the agent
+         * can have open. Unlike `maxSockets`, this parameter applies across all origins.
+         * @since v14.5.0, v12.19.0
+         */
+        maxTotalSockets: number;
+        /**
+         * An object which contains arrays of sockets currently awaiting use by
+         * the agent when `keepAlive` is enabled. Do not modify.
+         *
+         * Sockets in the `freeSockets` list will be automatically destroyed and
+         * removed from the array on `'timeout'`.
+         * @since v0.11.4
+         */
+        readonly freeSockets: NodeJS.ReadOnlyDict<net.Socket[]>;
+        /**
+         * An object which contains arrays of sockets currently in use by the
+         * agent. Do not modify.
+         * @since v0.3.6
+         */
+        readonly sockets: NodeJS.ReadOnlyDict<net.Socket[]>;
+        /**
+         * An object which contains queues of requests that have not yet been assigned to
+         * sockets. Do not modify.
+         * @since v0.5.9
+         */
+        readonly requests: NodeJS.ReadOnlyDict<ClientRequest[]>;
+        constructor(opts?: AgentOptions);
+        /**
+         * Destroy any sockets that are currently in use by the agent.
+         *
+         * It is usually not necessary to do this. However, if using an
+         * agent with `keepAlive` enabled, then it is best to explicitly shut down
+         * the agent when it is no longer needed. Otherwise,
+         * sockets might stay open for quite a long time before the server
+         * terminates them.
+         * @since v0.11.4
+         */
+        destroy(): void;
+        /**
+         * Produces a socket/stream to be used for HTTP requests.
+         *
+         * By default, this function behaves identically to `net.createConnection()`,
+         * synchronously returning the created socket. The optional `callback` parameter in the
+         * signature is **not** used by this default implementation.
+         *
+         * However, custom agents may override this method to provide greater flexibility,
+         * for example, to create sockets asynchronously. When overriding `createConnection`:
+         *
+         * 1. **Synchronous socket creation**: The overriding method can return the
+         *    socket/stream directly.
+         * 2. **Asynchronous socket creation**: The overriding method can accept the `callback`
+         *    and pass the created socket/stream to it (e.g., `callback(null, newSocket)`).
+         *    If an error occurs during socket creation, it should be passed as the first
+         *    argument to the `callback` (e.g., `callback(err)`).
+         *
+         * The agent will call the provided `createConnection` function with `options` and
+         * this internal `callback`. The `callback` provided by the agent has a signature
+         * of `(err, stream)`.
+         * @since v0.11.4
+         * @param options Options containing connection details. Check
+         * `net.createConnection` for the format of the options. For custom agents,
+         * this object is passed to the custom `createConnection` function.
+         * @param callback (Optional, primarily for custom agents) A function to be
+         * called by a custom `createConnection` implementation when the socket is
+         * created, especially for asynchronous operations.
+         * @returns The created socket. This is returned by the default
+         * implementation or by a custom synchronous `createConnection` implementation.
+         * If a custom `createConnection` uses the `callback` for asynchronous
+         * operation, this return value might not be the primary way to obtain the socket.
+         */
+        createConnection(
+            options: ClientRequestArgs,
+            callback?: (err: Error | null, stream: stream.Duplex) => void,
+        ): stream.Duplex | null | undefined;
+        /**
+         * Called when `socket` is detached from a request and could be persisted by the`Agent`. Default behavior is to:
+         *
+         * ```js
+         * socket.setKeepAlive(true, this.keepAliveMsecs);
+         * socket.unref();
+         * return true;
+         * ```
+         *
+         * This method can be overridden by a particular `Agent` subclass. If this
+         * method returns a falsy value, the socket will be destroyed instead of persisting
+         * it for use with the next request.
+         *
+         * The `socket` argument can be an instance of `net.Socket`, a subclass of `stream.Duplex`.
+         * @since v8.1.0
+         */
+        keepSocketAlive(socket: stream.Duplex): void;
+        /**
+         * Called when `socket` is attached to `request` after being persisted because of
+         * the keep-alive options. Default behavior is to:
+         *
+         * ```js
+         * socket.ref();
+         * ```
+         *
+         * This method can be overridden by a particular `Agent` subclass.
+         *
+         * The `socket` argument can be an instance of `net.Socket`, a subclass of `stream.Duplex`.
+         * @since v8.1.0
+         */
+        reuseSocket(socket: stream.Duplex, request: ClientRequest): void;
+        /**
+         * Get a unique name for a set of request options, to determine whether a
+         * connection can be reused. For an HTTP agent, this returns`host:port:localAddress` or `host:port:localAddress:family`. For an HTTPS agent,
+         * the name includes the CA, cert, ciphers, and other HTTPS/TLS-specific options
+         * that determine socket reusability.
+         * @since v0.11.4
+         * @param options A set of options providing information for name generation
+         */
+        getName(options?: ClientRequestArgs): string;
+    }
+    const METHODS: string[];
+    const STATUS_CODES: {
+        [errorCode: number]: string | undefined;
+        [errorCode: string]: string | undefined;
+    };
+    /**
+     * Returns a new instance of {@link Server}.
+     *
+     * The `requestListener` is a function which is automatically
+     * added to the `'request'` event.
+     *
+     * ```js
+     * import http from 'node:http';
+     *
+     * // Create a local server to receive data from
+     * const server = http.createServer((req, res) => {
+     *   res.writeHead(200, { 'Content-Type': 'application/json' });
+     *   res.end(JSON.stringify({
+     *     data: 'Hello World!',
+     *   }));
+     * });
+     *
+     * server.listen(8000);
+     * ```
+     *
+     * ```js
+     * import http from 'node:http';
+     *
+     * // Create a local server to receive data from
+     * const server = http.createServer();
+     *
+     * // Listen to the request event
+     * server.on('request', (request, res) => {
+     *   res.writeHead(200, { 'Content-Type': 'application/json' });
+     *   res.end(JSON.stringify({
+     *     data: 'Hello World!',
+     *   }));
+     * });
+     *
+     * server.listen(8000);
+     * ```
+     * @since v0.1.13
+     */
+    function createServer<
+        Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Response extends typeof ServerResponse<InstanceType<Request>> = typeof ServerResponse,
+    >(requestListener?: RequestListener<Request, Response>): Server<Request, Response>;
+    function createServer<
+        Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Response extends typeof ServerResponse<InstanceType<Request>> = typeof ServerResponse,
+    >(
+        options: ServerOptions<Request, Response>,
+        requestListener?: RequestListener<Request, Response>,
+    ): Server<Request, Response>;
+    // although RequestOptions are passed as ClientRequestArgs to ClientRequest directly,
+    // create interface RequestOptions would make the naming more clear to developers
+    interface RequestOptions extends ClientRequestArgs {}
+    /**
+     * `options` in `socket.connect()` are also supported.
+     *
+     * Node.js maintains several connections per server to make HTTP requests.
+     * This function allows one to transparently issue requests.
+     *
+     * `url` can be a string or a `URL` object. If `url` is a
+     * string, it is automatically parsed with `new URL()`. If it is a `URL` object, it will be automatically converted to an ordinary `options` object.
+     *
+     * If both `url` and `options` are specified, the objects are merged, with the `options` properties taking precedence.
+     *
+     * The optional `callback` parameter will be added as a one-time listener for
+     * the `'response'` event.
+     *
+     * `http.request()` returns an instance of the {@link ClientRequest} class. The `ClientRequest` instance is a writable stream. If one needs to
+     * upload a file with a POST request, then write to the `ClientRequest` object.
+     *
+     * ```js
+     * import http from 'node:http';
+     * import { Buffer } from 'node:buffer';
+     *
+     * const postData = JSON.stringify({
+     *   'msg': 'Hello World!',
+     * });
+     *
+     * const options = {
+     *   hostname: 'www.google.com',
+     *   port: 80,
+     *   path: '/upload',
+     *   method: 'POST',
+     *   headers: {
+     *     'Content-Type': 'application/json',
+     *     'Content-Length': Buffer.byteLength(postData),
+     *   },
+     * };
+     *
+     * const req = http.request(options, (res) => {
+     *   console.log(`STATUS: ${res.statusCode}`);
+     *   console.log(`HEADERS: ${JSON.stringify(res.headers)}`);
+     *   res.setEncoding('utf8');
+     *   res.on('data', (chunk) => {
+     *     console.log(`BODY: ${chunk}`);
+     *   });
+     *   res.on('end', () => {
+     *     console.log('No more data in response.');
+     *   });
+     * });
+     *
+     * req.on('error', (e) => {
+     *   console.error(`problem with request: ${e.message}`);
+     * });
+     *
+     * // Write data to request body
+     * req.write(postData);
+     * req.end();
+     * ```
+     *
+     * In the example `req.end()` was called. With `http.request()` one
+     * must always call `req.end()` to signify the end of the request -
+     * even if there is no data being written to the request body.
+     *
+     * If any error is encountered during the request (be that with DNS resolution,
+     * TCP level errors, or actual HTTP parse errors) an `'error'` event is emitted
+     * on the returned request object. As with all `'error'` events, if no listeners
+     * are registered the error will be thrown.
+     *
+     * There are a few special headers that should be noted.
+     *
+     * * Sending a 'Connection: keep-alive' will notify Node.js that the connection to
+     * the server should be persisted until the next request.
+     * * Sending a 'Content-Length' header will disable the default chunked encoding.
+     * * Sending an 'Expect' header will immediately send the request headers.
+     * Usually, when sending 'Expect: 100-continue', both a timeout and a listener
+     * for the `'continue'` event should be set. See RFC 2616 Section 8.2.3 for more
+     * information.
+     * * Sending an Authorization header will override using the `auth` option
+     * to compute basic authentication.
+     *
+     * Example using a `URL` as `options`:
+     *
+     * ```js
+     * const options = new URL('http://abc:xyz@example.com');
+     *
+     * const req = http.request(options, (res) => {
+     *   // ...
+     * });
+     * ```
+     *
+     * In a successful request, the following events will be emitted in the following
+     * order:
+     *
+     * * `'socket'`
+     * * `'response'`
+     *    * `'data'` any number of times, on the `res` object
+     *    (`'data'` will not be emitted at all if the response body is empty, for
+     *    instance, in most redirects)
+     *    * `'end'` on the `res` object
+     * * `'close'`
+     *
+     * In the case of a connection error, the following events will be emitted:
+     *
+     * * `'socket'`
+     * * `'error'`
+     * * `'close'`
+     *
+     * In the case of a premature connection close before the response is received,
+     * the following events will be emitted in the following order:
+     *
+     * * `'socket'`
+     * * `'error'` with an error with message `'Error: socket hang up'` and code `'ECONNRESET'`
+     * * `'close'`
+     *
+     * In the case of a premature connection close after the response is received,
+     * the following events will be emitted in the following order:
+     *
+     * * `'socket'`
+     * * `'response'`
+     *    * `'data'` any number of times, on the `res` object
+     * * (connection closed here)
+     * * `'aborted'` on the `res` object
+     * * `'close'`
+     * * `'error'` on the `res` object with an error with message `'Error: aborted'` and code `'ECONNRESET'`
+     * * `'close'` on the `res` object
+     *
+     * If `req.destroy()` is called before a socket is assigned, the following
+     * events will be emitted in the following order:
+     *
+     * * (`req.destroy()` called here)
+     * * `'error'` with an error with message `'Error: socket hang up'` and code `'ECONNRESET'`, or the error with which `req.destroy()` was called
+     * * `'close'`
+     *
+     * If `req.destroy()` is called before the connection succeeds, the following
+     * events will be emitted in the following order:
+     *
+     * * `'socket'`
+     * * (`req.destroy()` called here)
+     * * `'error'` with an error with message `'Error: socket hang up'` and code `'ECONNRESET'`, or the error with which `req.destroy()` was called
+     * * `'close'`
+     *
+     * If `req.destroy()` is called after the response is received, the following
+     * events will be emitted in the following order:
+     *
+     * * `'socket'`
+     * * `'response'`
+     *    * `'data'` any number of times, on the `res` object
+     * * (`req.destroy()` called here)
+     * * `'aborted'` on the `res` object
+     * * `'close'`
+     * * `'error'` on the `res` object with an error with message `'Error: aborted'` and code `'ECONNRESET'`, or the error with which `req.destroy()` was called
+     * * `'close'` on the `res` object
+     *
+     * If `req.abort()` is called before a socket is assigned, the following
+     * events will be emitted in the following order:
+     *
+     * * (`req.abort()` called here)
+     * * `'abort'`
+     * * `'close'`
+     *
+     * If `req.abort()` is called before the connection succeeds, the following
+     * events will be emitted in the following order:
+     *
+     * * `'socket'`
+     * * (`req.abort()` called here)
+     * * `'abort'`
+     * * `'error'` with an error with message `'Error: socket hang up'` and code `'ECONNRESET'`
+     * * `'close'`
+     *
+     * If `req.abort()` is called after the response is received, the following
+     * events will be emitted in the following order:
+     *
+     * * `'socket'`
+     * * `'response'`
+     *    * `'data'` any number of times, on the `res` object
+     * * (`req.abort()` called here)
+     * * `'abort'`
+     * * `'aborted'` on the `res` object
+     * * `'error'` on the `res` object with an error with message `'Error: aborted'` and code `'ECONNRESET'`.
+     * * `'close'`
+     * * `'close'` on the `res` object
+     *
+     * Setting the `timeout` option or using the `setTimeout()` function will
+     * not abort the request or do anything besides add a `'timeout'` event.
+     *
+     * Passing an `AbortSignal` and then calling `abort()` on the corresponding `AbortController` will behave the same way as calling `.destroy()` on the
+     * request. Specifically, the `'error'` event will be emitted with an error with
+     * the message `'AbortError: The operation was aborted'`, the code `'ABORT_ERR'` and the `cause`, if one was provided.
+     * @since v0.3.6
+     */
+    function request(options: RequestOptions | string | URL, callback?: (res: IncomingMessage) => void): ClientRequest;
+    function request(
+        url: string | URL,
+        options: RequestOptions,
+        callback?: (res: IncomingMessage) => void,
+    ): ClientRequest;
+    /**
+     * Since most requests are GET requests without bodies, Node.js provides this
+     * convenience method. The only difference between this method and {@link request} is that it sets the method to GET by default and calls `req.end()` automatically. The callback must take care to
+     * consume the response
+     * data for reasons stated in {@link ClientRequest} section.
+     *
+     * The `callback` is invoked with a single argument that is an instance of {@link IncomingMessage}.
+     *
+     * JSON fetching example:
+     *
+     * ```js
+     * http.get('http://localhost:8000/', (res) => {
+     *   const { statusCode } = res;
+     *   const contentType = res.headers['content-type'];
+     *
+     *   let error;
+     *   // Any 2xx status code signals a successful response but
+     *   // here we're only checking for 200.
+     *   if (statusCode !== 200) {
+     *     error = new Error('Request Failed.\n' +
+     *                       `Status Code: ${statusCode}`);
+     *   } else if (!/^application\/json/.test(contentType)) {
+     *     error = new Error('Invalid content-type.\n' +
+     *                       `Expected application/json but received ${contentType}`);
+     *   }
+     *   if (error) {
+     *     console.error(error.message);
+     *     // Consume response data to free up memory
+     *     res.resume();
+     *     return;
+     *   }
+     *
+     *   res.setEncoding('utf8');
+     *   let rawData = '';
+     *   res.on('data', (chunk) => { rawData += chunk; });
+     *   res.on('end', () => {
+     *     try {
+     *       const parsedData = JSON.parse(rawData);
+     *       console.log(parsedData);
+     *     } catch (e) {
+     *       console.error(e.message);
+     *     }
+     *   });
+     * }).on('error', (e) => {
+     *   console.error(`Got error: ${e.message}`);
+     * });
+     *
+     * // Create a local server to receive data from
+     * const server = http.createServer((req, res) => {
+     *   res.writeHead(200, { 'Content-Type': 'application/json' });
+     *   res.end(JSON.stringify({
+     *     data: 'Hello World!',
+     *   }));
+     * });
+     *
+     * server.listen(8000);
+     * ```
+     * @since v0.3.6
+     * @param options Accepts the same `options` as {@link request}, with the method set to GET by default.
+     */
+    function get(options: RequestOptions | string | URL, callback?: (res: IncomingMessage) => void): ClientRequest;
+    function get(url: string | URL, options: RequestOptions, callback?: (res: IncomingMessage) => void): ClientRequest;
+    /**
+     * Performs the low-level validations on the provided `name` that are done when `res.setHeader(name, value)` is called.
+     *
+     * Passing illegal value as `name` will result in a `TypeError` being thrown,
+     * identified by `code: 'ERR_INVALID_HTTP_TOKEN'`.
+     *
+     * It is not necessary to use this method before passing headers to an HTTP request
+     * or response. The HTTP module will automatically validate such headers.
+     *
+     * Example:
+     *
+     * ```js
+     * import { validateHeaderName } from 'node:http';
+     *
+     * try {
+     *   validateHeaderName('');
+     * } catch (err) {
+     *   console.error(err instanceof TypeError); // --> true
+     *   console.error(err.code); // --> 'ERR_INVALID_HTTP_TOKEN'
+     *   console.error(err.message); // --> 'Header name must be a valid HTTP token [""]'
+     * }
+     * ```
+     * @since v14.3.0
+     * @param [label='Header name'] Label for error message.
+     */
+    function validateHeaderName(name: string): void;
+    /**
+     * Performs the low-level validations on the provided `value` that are done when `res.setHeader(name, value)` is called.
+     *
+     * Passing illegal value as `value` will result in a `TypeError` being thrown.
+     *
+     * * Undefined value error is identified by `code: 'ERR_HTTP_INVALID_HEADER_VALUE'`.
+     * * Invalid value character error is identified by `code: 'ERR_INVALID_CHAR'`.
+     *
+     * It is not necessary to use this method before passing headers to an HTTP request
+     * or response. The HTTP module will automatically validate such headers.
+     *
+     * Examples:
+     *
+     * ```js
+     * import { validateHeaderValue } from 'node:http';
+     *
+     * try {
+     *   validateHeaderValue('x-my-header', undefined);
+     * } catch (err) {
+     *   console.error(err instanceof TypeError); // --> true
+     *   console.error(err.code === 'ERR_HTTP_INVALID_HEADER_VALUE'); // --> true
+     *   console.error(err.message); // --> 'Invalid value "undefined" for header "x-my-header"'
+     * }
+     *
+     * try {
+     *   validateHeaderValue('x-my-header', 'oʊmɪɡə');
+     * } catch (err) {
+     *   console.error(err instanceof TypeError); // --> true
+     *   console.error(err.code === 'ERR_INVALID_CHAR'); // --> true
+     *   console.error(err.message); // --> 'Invalid character in header content ["x-my-header"]'
+     * }
+     * ```
+     * @since v14.3.0
+     * @param name Header name
+     * @param value Header value
+     */
+    function validateHeaderValue(name: string, value: string): void;
+    /**
+     * Set the maximum number of idle HTTP parsers.
+     * @since v18.8.0, v16.18.0
+     * @param [max=1000]
+     */
+    function setMaxIdleHTTPParsers(max: number): void;
+    /**
+     * Dynamically resets the global configurations to enable built-in proxy support for
+     * `fetch()` and `http.request()`/`https.request()` at runtime, as an alternative
+     * to using the `--use-env-proxy` flag or `NODE_USE_ENV_PROXY` environment variable.
+     * It can also be used to override settings configured from the environment variables.
+     *
+     * As this function resets the global configurations, any previously configured
+     * `http.globalAgent`, `https.globalAgent` or undici global dispatcher would be
+     * overridden after this function is invoked. It's recommended to invoke it before any
+     * requests are made and avoid invoking it in the middle of any requests.
+     *
+     * See [Built-in Proxy Support](https://nodejs.org/docs/latest-v25.x/api/http.html#built-in-proxy-support) for details on proxy URL formats and `NO_PROXY`
+     * syntax.
+     * @since v25.4.0
+     * @param proxyEnv An object containing proxy configuration. This accepts the
+     * same options as the `proxyEnv` option accepted by {@link Agent}. **Default:**
+     * `process.env`.
+     * @returns A function that restores the original agent and dispatcher
+     * settings to the state before this `http.setGlobalProxyFromEnv()` is invoked.
+     */
+    function setGlobalProxyFromEnv(proxyEnv?: ProxyEnv): () => void;
+    /**
+     * Global instance of `Agent` which is used as the default for all HTTP client
+     * requests. Diverges from a default `Agent` configuration by having `keepAlive`
+     * enabled and a `timeout` of 5 seconds.
+     * @since v0.5.9
+     */
+    let globalAgent: Agent;
+    /**
+     * Read-only property specifying the maximum allowed size of HTTP headers in bytes.
+     * Defaults to 16KB. Configurable using the `--max-http-header-size` CLI option.
+     */
+    const maxHeaderSize: number;
+    /**
+     * A browser-compatible implementation of `WebSocket`.
+     * @since v22.5.0
+     */
+    const WebSocket: typeof import("undici-types").WebSocket;
+    /**
+     * @since v22.5.0
+     */
+    const CloseEvent: typeof import("undici-types").CloseEvent;
+    /**
+     * @since v22.5.0
+     */
+    const MessageEvent: typeof import("undici-types").MessageEvent;
+}
+declare module "http" {
+    export * from "node:http";
+}
diff --git a/mqtt-backend/node_modules/@types/node/http2.d.ts b/mqtt-backend/node_modules/@types/node/http2.d.ts
new file mode 100644
index 0000000..b2fcc59
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/http2.d.ts
@@ -0,0 +1,2470 @@
+declare module "node:http2" {
+    import { NonSharedBuffer } from "node:buffer";
+    import { InternalEventEmitter } from "node:events";
+    import * as fs from "node:fs";
+    import * as net from "node:net";
+    import * as stream from "node:stream";
+    import * as tls from "node:tls";
+    import * as url from "node:url";
+    import {
+        IncomingHttpHeaders as Http1IncomingHttpHeaders,
+        IncomingMessage,
+        OutgoingHttpHeaders,
+        ServerResponse,
+    } from "node:http";
+    interface IncomingHttpStatusHeader {
+        ":status"?: number | undefined;
+    }
+    interface IncomingHttpHeaders extends Http1IncomingHttpHeaders {
+        ":path"?: string | undefined;
+        ":method"?: string | undefined;
+        ":authority"?: string | undefined;
+        ":scheme"?: string | undefined;
+    }
+    // Http2Stream
+    interface StreamState {
+        localWindowSize?: number | undefined;
+        state?: number | undefined;
+        localClose?: number | undefined;
+        remoteClose?: number | undefined;
+        /** @deprecated */
+        sumDependencyWeight?: number | undefined;
+        /** @deprecated */
+        weight?: number | undefined;
+    }
+    interface ServerStreamResponseOptions {
+        endStream?: boolean | undefined;
+        waitForTrailers?: boolean | undefined;
+    }
+    interface StatOptions {
+        offset: number;
+        length: number;
+    }
+    interface ServerStreamFileResponseOptions {
+        statCheck?:
+            | ((stats: fs.Stats, headers: OutgoingHttpHeaders, statOptions: StatOptions) => void)
+            | undefined;
+        waitForTrailers?: boolean | undefined;
+        offset?: number | undefined;
+        length?: number | undefined;
+    }
+    interface ServerStreamFileResponseOptionsWithError extends ServerStreamFileResponseOptions {
+        onError?: ((err: NodeJS.ErrnoException) => void) | undefined;
+    }
+    interface Http2StreamEventMap extends stream.DuplexEventMap {
+        "aborted": [];
+        "data": [chunk: string | NonSharedBuffer];
+        "frameError": [type: number, code: number, id: number];
+        "ready": [];
+        "streamClosed": [code: number];
+        "timeout": [];
+        "trailers": [trailers: IncomingHttpHeaders, flags: number];
+        "wantTrailers": [];
+    }
+    interface Http2Stream extends stream.Duplex {
+        /**
+         * Set to `true` if the `Http2Stream` instance was aborted abnormally. When set,
+         * the `'aborted'` event will have been emitted.
+         * @since v8.4.0
+         */
+        readonly aborted: boolean;
+        /**
+         * This property shows the number of characters currently buffered to be written.
+         * See `net.Socket.bufferSize` for details.
+         * @since v11.2.0, v10.16.0
+         */
+        readonly bufferSize: number;
+        /**
+         * Set to `true` if the `Http2Stream` instance has been closed.
+         * @since v9.4.0
+         */
+        readonly closed: boolean;
+        /**
+         * Set to `true` if the `Http2Stream` instance has been destroyed and is no longer
+         * usable.
+         * @since v8.4.0
+         */
+        readonly destroyed: boolean;
+        /**
+         * Set to `true` if the `END_STREAM` flag was set in the request or response
+         * HEADERS frame received, indicating that no additional data should be received
+         * and the readable side of the `Http2Stream` will be closed.
+         * @since v10.11.0
+         */
+        readonly endAfterHeaders: boolean;
+        /**
+         * The numeric stream identifier of this `Http2Stream` instance. Set to `undefined` if the stream identifier has not yet been assigned.
+         * @since v8.4.0
+         */
+        readonly id?: number | undefined;
+        /**
+         * Set to `true` if the `Http2Stream` instance has not yet been assigned a
+         * numeric stream identifier.
+         * @since v9.4.0
+         */
+        readonly pending: boolean;
+        /**
+         * Set to the `RST_STREAM` `error code` reported when the `Http2Stream` is
+         * destroyed after either receiving an `RST_STREAM` frame from the connected peer,
+         * calling `http2stream.close()`, or `http2stream.destroy()`. Will be `undefined` if the `Http2Stream` has not been closed.
+         * @since v8.4.0
+         */
+        readonly rstCode: number;
+        /**
+         * An object containing the outbound headers sent for this `Http2Stream`.
+         * @since v9.5.0
+         */
+        readonly sentHeaders: OutgoingHttpHeaders;
+        /**
+         * An array of objects containing the outbound informational (additional) headers
+         * sent for this `Http2Stream`.
+         * @since v9.5.0
+         */
+        readonly sentInfoHeaders?: OutgoingHttpHeaders[] | undefined;
+        /**
+         * An object containing the outbound trailers sent for this `HttpStream`.
+         * @since v9.5.0
+         */
+        readonly sentTrailers?: OutgoingHttpHeaders | undefined;
+        /**
+         * A reference to the `Http2Session` instance that owns this `Http2Stream`. The
+         * value will be `undefined` after the `Http2Stream` instance is destroyed.
+         * @since v8.4.0
+         */
+        readonly session: Http2Session | undefined;
+        /**
+         * Provides miscellaneous information about the current state of the `Http2Stream`.
+         *
+         * A current state of this `Http2Stream`.
+         * @since v8.4.0
+         */
+        readonly state: StreamState;
+        /**
+         * Closes the `Http2Stream` instance by sending an `RST_STREAM` frame to the
+         * connected HTTP/2 peer.
+         * @since v8.4.0
+         * @param [code=http2.constants.NGHTTP2_NO_ERROR] Unsigned 32-bit integer identifying the error code.
+         * @param callback An optional function registered to listen for the `'close'` event.
+         */
+        close(code?: number, callback?: () => void): void;
+        /**
+         * @deprecated Priority signaling is no longer supported in Node.js.
+         */
+        priority(options: unknown): void;
+        /**
+         * ```js
+         * import http2 from 'node:http2';
+         * const client = http2.connect('http://example.org:8000');
+         * const { NGHTTP2_CANCEL } = http2.constants;
+         * const req = client.request({ ':path': '/' });
+         *
+         * // Cancel the stream if there's no activity after 5 seconds
+         * req.setTimeout(5000, () => req.close(NGHTTP2_CANCEL));
+         * ```
+         * @since v8.4.0
+         */
+        setTimeout(msecs: number, callback?: () => void): void;
+        /**
+         * Sends a trailing `HEADERS` frame to the connected HTTP/2 peer. This method
+         * will cause the `Http2Stream` to be immediately closed and must only be
+         * called after the `'wantTrailers'` event has been emitted. When sending a
+         * request or sending a response, the `options.waitForTrailers` option must be set
+         * in order to keep the `Http2Stream` open after the final `DATA` frame so that
+         * trailers can be sent.
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * const server = http2.createServer();
+         * server.on('stream', (stream) => {
+         *   stream.respond(undefined, { waitForTrailers: true });
+         *   stream.on('wantTrailers', () => {
+         *     stream.sendTrailers({ xyz: 'abc' });
+         *   });
+         *   stream.end('Hello World');
+         * });
+         * ```
+         *
+         * The HTTP/1 specification forbids trailers from containing HTTP/2 pseudo-header
+         * fields (e.g. `':method'`, `':path'`, etc).
+         * @since v10.0.0
+         */
+        sendTrailers(headers: OutgoingHttpHeaders): void;
+        // #region InternalEventEmitter
+        addListener<E extends keyof Http2StreamEventMap>(
+            eventName: E,
+            listener: (...args: Http2StreamEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof Http2StreamEventMap>(eventName: E, ...args: Http2StreamEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof Http2StreamEventMap>(
+            eventName: E,
+            listener?: (...args: Http2StreamEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof Http2StreamEventMap>(eventName: E): ((...args: Http2StreamEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof Http2StreamEventMap>(
+            eventName: E,
+            listener: (...args: Http2StreamEventMap[E]) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof Http2StreamEventMap>(
+            eventName: E,
+            listener: (...args: Http2StreamEventMap[E]) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof Http2StreamEventMap>(
+            eventName: E,
+            listener: (...args: Http2StreamEventMap[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof Http2StreamEventMap>(
+            eventName: E,
+            listener: (...args: Http2StreamEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof Http2StreamEventMap>(
+            eventName: E,
+            listener: (...args: Http2StreamEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof Http2StreamEventMap>(eventName: E): ((...args: Http2StreamEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof Http2StreamEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof Http2StreamEventMap>(
+            eventName: E,
+            listener: (...args: Http2StreamEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface ClientHttp2StreamEventMap extends Http2StreamEventMap {
+        "continue": [];
+        "headers": [headers: IncomingHttpHeaders & IncomingHttpStatusHeader, flags: number, rawHeaders: string[]];
+        "push": [headers: IncomingHttpHeaders, flags: number];
+        "response": [headers: IncomingHttpHeaders & IncomingHttpStatusHeader, flags: number, rawHeaders: string[]];
+    }
+    interface ClientHttp2Stream extends Http2Stream {
+        // #region InternalEventEmitter
+        addListener<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof ClientHttp2StreamEventMap>(eventName: E, ...args: ClientHttp2StreamEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener?: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+        ): ((...args: ClientHttp2StreamEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+        ): ((...args: ClientHttp2StreamEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof ClientHttp2StreamEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface ServerHttp2Stream extends Http2Stream {
+        /**
+         * True if headers were sent, false otherwise (read-only).
+         * @since v8.4.0
+         */
+        readonly headersSent: boolean;
+        /**
+         * Read-only property mapped to the `SETTINGS_ENABLE_PUSH` flag of the remote
+         * client's most recent `SETTINGS` frame. Will be `true` if the remote peer
+         * accepts push streams, `false` otherwise. Settings are the same for every `Http2Stream` in the same `Http2Session`.
+         * @since v8.4.0
+         */
+        readonly pushAllowed: boolean;
+        /**
+         * Sends an additional informational `HEADERS` frame to the connected HTTP/2 peer.
+         * @since v8.4.0
+         */
+        additionalHeaders(headers: OutgoingHttpHeaders): void;
+        /**
+         * Initiates a push stream. The callback is invoked with the new `Http2Stream` instance created for the push stream passed as the second argument, or an `Error` passed as the first argument.
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * const server = http2.createServer();
+         * server.on('stream', (stream) => {
+         *   stream.respond({ ':status': 200 });
+         *   stream.pushStream({ ':path': '/' }, (err, pushStream, headers) => {
+         *     if (err) throw err;
+         *     pushStream.respond({ ':status': 200 });
+         *     pushStream.end('some pushed data');
+         *   });
+         *   stream.end('some data');
+         * });
+         * ```
+         *
+         * Setting the weight of a push stream is not allowed in the `HEADERS` frame. Pass
+         * a `weight` value to `http2stream.priority` with the `silent` option set to `true` to enable server-side bandwidth balancing between concurrent streams.
+         *
+         * Calling `http2stream.pushStream()` from within a pushed stream is not permitted
+         * and will throw an error.
+         * @since v8.4.0
+         * @param callback Callback that is called once the push stream has been initiated.
+         */
+        pushStream(
+            headers: OutgoingHttpHeaders,
+            callback?: (err: Error | null, pushStream: ServerHttp2Stream, headers: OutgoingHttpHeaders) => void,
+        ): void;
+        pushStream(
+            headers: OutgoingHttpHeaders,
+            options?: Pick<ClientSessionRequestOptions, "exclusive" | "parent">,
+            callback?: (err: Error | null, pushStream: ServerHttp2Stream, headers: OutgoingHttpHeaders) => void,
+        ): void;
+        /**
+         * ```js
+         * import http2 from 'node:http2';
+         * const server = http2.createServer();
+         * server.on('stream', (stream) => {
+         *   stream.respond({ ':status': 200 });
+         *   stream.end('some data');
+         * });
+         * ```
+         *
+         * Initiates a response. When the `options.waitForTrailers` option is set, the `'wantTrailers'` event
+         * will be emitted immediately after queuing the last chunk of payload data to be sent.
+         * The `http2stream.sendTrailers()` method can then be used to send trailing header fields to the peer.
+         *
+         * When `options.waitForTrailers` is set, the `Http2Stream` will not automatically
+         * close when the final `DATA` frame is transmitted. User code must call either `http2stream.sendTrailers()` or `http2stream.close()` to close the `Http2Stream`.
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * const server = http2.createServer();
+         * server.on('stream', (stream) => {
+         *   stream.respond({ ':status': 200 }, { waitForTrailers: true });
+         *   stream.on('wantTrailers', () => {
+         *     stream.sendTrailers({ ABC: 'some value to send' });
+         *   });
+         *   stream.end('some data');
+         * });
+         * ```
+         * @since v8.4.0
+         */
+        respond(headers?: OutgoingHttpHeaders | readonly string[], options?: ServerStreamResponseOptions): void;
+        /**
+         * Initiates a response whose data is read from the given file descriptor. No
+         * validation is performed on the given file descriptor. If an error occurs while
+         * attempting to read data using the file descriptor, the `Http2Stream` will be
+         * closed using an `RST_STREAM` frame using the standard `INTERNAL_ERROR` code.
+         *
+         * When used, the `Http2Stream` object's `Duplex` interface will be closed
+         * automatically.
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * import fs from 'node:fs';
+         *
+         * const server = http2.createServer();
+         * server.on('stream', (stream) => {
+         *   const fd = fs.openSync('/some/file', 'r');
+         *
+         *   const stat = fs.fstatSync(fd);
+         *   const headers = {
+         *     'content-length': stat.size,
+         *     'last-modified': stat.mtime.toUTCString(),
+         *     'content-type': 'text/plain; charset=utf-8',
+         *   };
+         *   stream.respondWithFD(fd, headers);
+         *   stream.on('close', () => fs.closeSync(fd));
+         * });
+         * ```
+         *
+         * The optional `options.statCheck` function may be specified to give user code
+         * an opportunity to set additional content headers based on the `fs.Stat` details
+         * of the given fd. If the `statCheck` function is provided, the `http2stream.respondWithFD()` method will
+         * perform an `fs.fstat()` call to collect details on the provided file descriptor.
+         *
+         * The `offset` and `length` options may be used to limit the response to a
+         * specific range subset. This can be used, for instance, to support HTTP Range
+         * requests.
+         *
+         * The file descriptor or `FileHandle` is not closed when the stream is closed,
+         * so it will need to be closed manually once it is no longer needed.
+         * Using the same file descriptor concurrently for multiple streams
+         * is not supported and may result in data loss. Re-using a file descriptor
+         * after a stream has finished is supported.
+         *
+         * When the `options.waitForTrailers` option is set, the `'wantTrailers'` event
+         * will be emitted immediately after queuing the last chunk of payload data to be
+         * sent. The `http2stream.sendTrailers()` method can then be used to sent trailing
+         * header fields to the peer.
+         *
+         * When `options.waitForTrailers` is set, the `Http2Stream` will not automatically
+         * close when the final `DATA` frame is transmitted. User code _must_ call either `http2stream.sendTrailers()`
+         * or `http2stream.close()` to close the `Http2Stream`.
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * import fs from 'node:fs';
+         *
+         * const server = http2.createServer();
+         * server.on('stream', (stream) => {
+         *   const fd = fs.openSync('/some/file', 'r');
+         *
+         *   const stat = fs.fstatSync(fd);
+         *   const headers = {
+         *     'content-length': stat.size,
+         *     'last-modified': stat.mtime.toUTCString(),
+         *     'content-type': 'text/plain; charset=utf-8',
+         *   };
+         *   stream.respondWithFD(fd, headers, { waitForTrailers: true });
+         *   stream.on('wantTrailers', () => {
+         *     stream.sendTrailers({ ABC: 'some value to send' });
+         *   });
+         *
+         *   stream.on('close', () => fs.closeSync(fd));
+         * });
+         * ```
+         * @since v8.4.0
+         * @param fd A readable file descriptor.
+         */
+        respondWithFD(
+            fd: number | fs.promises.FileHandle,
+            headers?: OutgoingHttpHeaders,
+            options?: ServerStreamFileResponseOptions,
+        ): void;
+        /**
+         * Sends a regular file as the response. The `path` must specify a regular file
+         * or an `'error'` event will be emitted on the `Http2Stream` object.
+         *
+         * When used, the `Http2Stream` object's `Duplex` interface will be closed
+         * automatically.
+         *
+         * The optional `options.statCheck` function may be specified to give user code
+         * an opportunity to set additional content headers based on the `fs.Stat` details
+         * of the given file:
+         *
+         * If an error occurs while attempting to read the file data, the `Http2Stream` will be closed using an
+         * `RST_STREAM` frame using the standard `INTERNAL_ERROR` code.
+         * If the `onError` callback is defined, then it will be called. Otherwise, the stream will be destroyed.
+         *
+         * Example using a file path:
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * const server = http2.createServer();
+         * server.on('stream', (stream) => {
+         *   function statCheck(stat, headers) {
+         *     headers['last-modified'] = stat.mtime.toUTCString();
+         *   }
+         *
+         *   function onError(err) {
+         *     // stream.respond() can throw if the stream has been destroyed by
+         *     // the other side.
+         *     try {
+         *       if (err.code === 'ENOENT') {
+         *         stream.respond({ ':status': 404 });
+         *       } else {
+         *         stream.respond({ ':status': 500 });
+         *       }
+         *     } catch (err) {
+         *       // Perform actual error handling.
+         *       console.error(err);
+         *     }
+         *     stream.end();
+         *   }
+         *
+         *   stream.respondWithFile('/some/file',
+         *                          { 'content-type': 'text/plain; charset=utf-8' },
+         *                          { statCheck, onError });
+         * });
+         * ```
+         *
+         * The `options.statCheck` function may also be used to cancel the send operation
+         * by returning `false`. For instance, a conditional request may check the stat
+         * results to determine if the file has been modified to return an appropriate `304` response:
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * const server = http2.createServer();
+         * server.on('stream', (stream) => {
+         *   function statCheck(stat, headers) {
+         *     // Check the stat here...
+         *     stream.respond({ ':status': 304 });
+         *     return false; // Cancel the send operation
+         *   }
+         *   stream.respondWithFile('/some/file',
+         *                          { 'content-type': 'text/plain; charset=utf-8' },
+         *                          { statCheck });
+         * });
+         * ```
+         *
+         * The `content-length` header field will be automatically set.
+         *
+         * The `offset` and `length` options may be used to limit the response to a
+         * specific range subset. This can be used, for instance, to support HTTP Range
+         * requests.
+         *
+         * The `options.onError` function may also be used to handle all the errors
+         * that could happen before the delivery of the file is initiated. The
+         * default behavior is to destroy the stream.
+         *
+         * When the `options.waitForTrailers` option is set, the `'wantTrailers'` event
+         * will be emitted immediately after queuing the last chunk of payload data to be
+         * sent. The `http2stream.sendTrailers()` method can then be used to sent trailing
+         * header fields to the peer.
+         *
+         * When `options.waitForTrailers` is set, the `Http2Stream` will not automatically
+         * close when the final `DATA` frame is transmitted. User code must call either`http2stream.sendTrailers()` or `http2stream.close()` to close the`Http2Stream`.
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * const server = http2.createServer();
+         * server.on('stream', (stream) => {
+         *   stream.respondWithFile('/some/file',
+         *                          { 'content-type': 'text/plain; charset=utf-8' },
+         *                          { waitForTrailers: true });
+         *   stream.on('wantTrailers', () => {
+         *     stream.sendTrailers({ ABC: 'some value to send' });
+         *   });
+         * });
+         * ```
+         * @since v8.4.0
+         */
+        respondWithFile(
+            path: string,
+            headers?: OutgoingHttpHeaders,
+            options?: ServerStreamFileResponseOptionsWithError,
+        ): void;
+    }
+    // Http2Session
+    interface Settings {
+        headerTableSize?: number | undefined;
+        enablePush?: boolean | undefined;
+        initialWindowSize?: number | undefined;
+        maxFrameSize?: number | undefined;
+        maxConcurrentStreams?: number | undefined;
+        maxHeaderListSize?: number | undefined;
+        enableConnectProtocol?: boolean | undefined;
+    }
+    interface ClientSessionRequestOptions {
+        endStream?: boolean | undefined;
+        exclusive?: boolean | undefined;
+        parent?: number | undefined;
+        waitForTrailers?: boolean | undefined;
+        signal?: AbortSignal | undefined;
+    }
+    interface SessionState {
+        effectiveLocalWindowSize?: number | undefined;
+        effectiveRecvDataLength?: number | undefined;
+        nextStreamID?: number | undefined;
+        localWindowSize?: number | undefined;
+        lastProcStreamID?: number | undefined;
+        remoteWindowSize?: number | undefined;
+        outboundQueueSize?: number | undefined;
+        deflateDynamicTableSize?: number | undefined;
+        inflateDynamicTableSize?: number | undefined;
+    }
+    interface Http2SessionEventMap {
+        "close": [];
+        "connect": [session: Http2Session, socket: net.Socket | tls.TLSSocket];
+        "error": [err: Error];
+        "frameError": [type: number, code: number, id: number];
+        "goaway": [errorCode: number, lastStreamID: number, opaqueData?: NonSharedBuffer];
+        "localSettings": [settings: Settings];
+        "ping": [payload: Buffer];
+        "remoteSettings": [settings: Settings];
+        "stream": [
+            stream: Http2Stream,
+            headers: IncomingHttpHeaders & IncomingHttpStatusHeader,
+            flags: number,
+            rawHeaders: string[],
+        ];
+        "timeout": [];
+    }
+    interface Http2Session extends InternalEventEmitter<Http2SessionEventMap> {
+        /**
+         * Value will be `undefined` if the `Http2Session` is not yet connected to a
+         * socket, `h2c` if the `Http2Session` is not connected to a `TLSSocket`, or
+         * will return the value of the connected `TLSSocket`'s own `alpnProtocol` property.
+         * @since v9.4.0
+         */
+        readonly alpnProtocol?: string | undefined;
+        /**
+         * Will be `true` if this `Http2Session` instance has been closed, otherwise `false`.
+         * @since v9.4.0
+         */
+        readonly closed: boolean;
+        /**
+         * Will be `true` if this `Http2Session` instance is still connecting, will be set
+         * to `false` before emitting `connect` event and/or calling the `http2.connect` callback.
+         * @since v10.0.0
+         */
+        readonly connecting: boolean;
+        /**
+         * Will be `true` if this `Http2Session` instance has been destroyed and must no
+         * longer be used, otherwise `false`.
+         * @since v8.4.0
+         */
+        readonly destroyed: boolean;
+        /**
+         * Value is `undefined` if the `Http2Session` session socket has not yet been
+         * connected, `true` if the `Http2Session` is connected with a `TLSSocket`,
+         * and `false` if the `Http2Session` is connected to any other kind of socket
+         * or stream.
+         * @since v9.4.0
+         */
+        readonly encrypted?: boolean | undefined;
+        /**
+         * A prototype-less object describing the current local settings of this `Http2Session`.
+         * The local settings are local to _this_`Http2Session` instance.
+         * @since v8.4.0
+         */
+        readonly localSettings: Settings;
+        /**
+         * If the `Http2Session` is connected to a `TLSSocket`, the `originSet` property
+         * will return an `Array` of origins for which the `Http2Session` may be
+         * considered authoritative.
+         *
+         * The `originSet` property is only available when using a secure TLS connection.
+         * @since v9.4.0
+         */
+        readonly originSet?: string[] | undefined;
+        /**
+         * Indicates whether the `Http2Session` is currently waiting for acknowledgment of
+         * a sent `SETTINGS` frame. Will be `true` after calling the `http2session.settings()` method.
+         * Will be `false` once all sent `SETTINGS` frames have been acknowledged.
+         * @since v8.4.0
+         */
+        readonly pendingSettingsAck: boolean;
+        /**
+         * A prototype-less object describing the current remote settings of this`Http2Session`.
+         * The remote settings are set by the _connected_ HTTP/2 peer.
+         * @since v8.4.0
+         */
+        readonly remoteSettings: Settings;
+        /**
+         * Returns a `Proxy` object that acts as a `net.Socket` (or `tls.TLSSocket`) but
+         * limits available methods to ones safe to use with HTTP/2.
+         *
+         * `destroy`, `emit`, `end`, `pause`, `read`, `resume`, and `write` will throw
+         * an error with code `ERR_HTTP2_NO_SOCKET_MANIPULATION`. See `Http2Session and Sockets` for more information.
+         *
+         * `setTimeout` method will be called on this `Http2Session`.
+         *
+         * All other interactions will be routed directly to the socket.
+         * @since v8.4.0
+         */
+        readonly socket: net.Socket | tls.TLSSocket;
+        /**
+         * Provides miscellaneous information about the current state of the`Http2Session`.
+         *
+         * An object describing the current status of this `Http2Session`.
+         * @since v8.4.0
+         */
+        readonly state: SessionState;
+        /**
+         * The `http2session.type` will be equal to `http2.constants.NGHTTP2_SESSION_SERVER` if this `Http2Session` instance is a
+         * server, and `http2.constants.NGHTTP2_SESSION_CLIENT` if the instance is a
+         * client.
+         * @since v8.4.0
+         */
+        readonly type: number;
+        /**
+         * Gracefully closes the `Http2Session`, allowing any existing streams to
+         * complete on their own and preventing new `Http2Stream` instances from being
+         * created. Once closed, `http2session.destroy()`_might_ be called if there
+         * are no open `Http2Stream` instances.
+         *
+         * If specified, the `callback` function is registered as a handler for the`'close'` event.
+         * @since v9.4.0
+         */
+        close(callback?: () => void): void;
+        /**
+         * Immediately terminates the `Http2Session` and the associated `net.Socket` or `tls.TLSSocket`.
+         *
+         * Once destroyed, the `Http2Session` will emit the `'close'` event. If `error` is not undefined, an `'error'` event will be emitted immediately before the `'close'` event.
+         *
+         * If there are any remaining open `Http2Streams` associated with the `Http2Session`, those will also be destroyed.
+         * @since v8.4.0
+         * @param error An `Error` object if the `Http2Session` is being destroyed due to an error.
+         * @param code The HTTP/2 error code to send in the final `GOAWAY` frame. If unspecified, and `error` is not undefined, the default is `INTERNAL_ERROR`, otherwise defaults to `NO_ERROR`.
+         */
+        destroy(error?: Error, code?: number): void;
+        /**
+         * Transmits a `GOAWAY` frame to the connected peer _without_ shutting down the`Http2Session`.
+         * @since v9.4.0
+         * @param code An HTTP/2 error code
+         * @param lastStreamID The numeric ID of the last processed `Http2Stream`
+         * @param opaqueData A `TypedArray` or `DataView` instance containing additional data to be carried within the `GOAWAY` frame.
+         */
+        goaway(code?: number, lastStreamID?: number, opaqueData?: NodeJS.ArrayBufferView): void;
+        /**
+         * Sends a `PING` frame to the connected HTTP/2 peer. A `callback` function must
+         * be provided. The method will return `true` if the `PING` was sent, `false` otherwise.
+         *
+         * The maximum number of outstanding (unacknowledged) pings is determined by the `maxOutstandingPings` configuration option. The default maximum is 10.
+         *
+         * If provided, the `payload` must be a `Buffer`, `TypedArray`, or `DataView` containing 8 bytes of data that will be transmitted with the `PING` and
+         * returned with the ping acknowledgment.
+         *
+         * The callback will be invoked with three arguments: an error argument that will
+         * be `null` if the `PING` was successfully acknowledged, a `duration` argument
+         * that reports the number of milliseconds elapsed since the ping was sent and the
+         * acknowledgment was received, and a `Buffer` containing the 8-byte `PING` payload.
+         *
+         * ```js
+         * session.ping(Buffer.from('abcdefgh'), (err, duration, payload) => {
+         *   if (!err) {
+         *     console.log(`Ping acknowledged in ${duration} milliseconds`);
+         *     console.log(`With payload '${payload.toString()}'`);
+         *   }
+         * });
+         * ```
+         *
+         * If the `payload` argument is not specified, the default payload will be the
+         * 64-bit timestamp (little endian) marking the start of the `PING` duration.
+         * @since v8.9.3
+         * @param payload Optional ping payload.
+         */
+        ping(callback: (err: Error | null, duration: number, payload: NonSharedBuffer) => void): boolean;
+        ping(
+            payload: NodeJS.ArrayBufferView,
+            callback: (err: Error | null, duration: number, payload: NonSharedBuffer) => void,
+        ): boolean;
+        /**
+         * Calls `ref()` on this `Http2Session` instance's underlying `net.Socket`.
+         * @since v9.4.0
+         */
+        ref(): void;
+        /**
+         * Sets the local endpoint's window size.
+         * The `windowSize` is the total window size to set, not
+         * the delta.
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         *
+         * const server = http2.createServer();
+         * const expectedWindowSize = 2 ** 20;
+         * server.on('connect', (session) => {
+         *
+         *   // Set local window size to be 2 ** 20
+         *   session.setLocalWindowSize(expectedWindowSize);
+         * });
+         * ```
+         * @since v15.3.0, v14.18.0
+         */
+        setLocalWindowSize(windowSize: number): void;
+        /**
+         * Used to set a callback function that is called when there is no activity on
+         * the `Http2Session` after `msecs` milliseconds. The given `callback` is
+         * registered as a listener on the `'timeout'` event.
+         * @since v8.4.0
+         */
+        setTimeout(msecs: number, callback?: () => void): void;
+        /**
+         * Updates the current local settings for this `Http2Session` and sends a new `SETTINGS` frame to the connected HTTP/2 peer.
+         *
+         * Once called, the `http2session.pendingSettingsAck` property will be `true` while the session is waiting for the remote peer to acknowledge the new
+         * settings.
+         *
+         * The new settings will not become effective until the `SETTINGS` acknowledgment
+         * is received and the `'localSettings'` event is emitted. It is possible to send
+         * multiple `SETTINGS` frames while acknowledgment is still pending.
+         * @since v8.4.0
+         * @param callback Callback that is called once the session is connected or right away if the session is already connected.
+         */
+        settings(
+            settings: Settings,
+            callback?: (err: Error | null, settings: Settings, duration: number) => void,
+        ): void;
+        /**
+         * Calls `unref()` on this `Http2Session`instance's underlying `net.Socket`.
+         * @since v9.4.0
+         */
+        unref(): void;
+    }
+    interface ClientHttp2SessionEventMap extends Http2SessionEventMap {
+        "altsvc": [alt: string, origin: string, streamId: number];
+        "connect": [session: ClientHttp2Session, socket: net.Socket | tls.TLSSocket];
+        "origin": [origins: string[]];
+        "stream": [
+            stream: ClientHttp2Stream,
+            headers: IncomingHttpHeaders & IncomingHttpStatusHeader,
+            flags: number,
+            rawHeaders: string[],
+        ];
+    }
+    interface ClientHttp2Session extends Http2Session {
+        /**
+         * For HTTP/2 Client `Http2Session` instances only, the `http2session.request()` creates and returns an `Http2Stream` instance that can be used to send an
+         * HTTP/2 request to the connected server.
+         *
+         * When a `ClientHttp2Session` is first created, the socket may not yet be
+         * connected. if `clienthttp2session.request()` is called during this time, the
+         * actual request will be deferred until the socket is ready to go.
+         * If the `session` is closed before the actual request be executed, an `ERR_HTTP2_GOAWAY_SESSION` is thrown.
+         *
+         * This method is only available if `http2session.type` is equal to `http2.constants.NGHTTP2_SESSION_CLIENT`.
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * const clientSession = http2.connect('https://localhost:1234');
+         * const {
+         *   HTTP2_HEADER_PATH,
+         *   HTTP2_HEADER_STATUS,
+         * } = http2.constants;
+         *
+         * const req = clientSession.request({ [HTTP2_HEADER_PATH]: '/' });
+         * req.on('response', (headers) => {
+         *   console.log(headers[HTTP2_HEADER_STATUS]);
+         *   req.on('data', (chunk) => { // ..  });
+         *   req.on('end', () => { // ..  });
+         * });
+         * ```
+         *
+         * When the `options.waitForTrailers` option is set, the `'wantTrailers'` event
+         * is emitted immediately after queuing the last chunk of payload data to be sent.
+         * The `http2stream.sendTrailers()` method can then be called to send trailing
+         * headers to the peer.
+         *
+         * When `options.waitForTrailers` is set, the `Http2Stream` will not automatically
+         * close when the final `DATA` frame is transmitted. User code must call either`http2stream.sendTrailers()` or `http2stream.close()` to close the`Http2Stream`.
+         *
+         * When `options.signal` is set with an `AbortSignal` and then `abort` on the
+         * corresponding `AbortController` is called, the request will emit an `'error'`event with an `AbortError` error.
+         *
+         * The `:method` and `:path` pseudo-headers are not specified within `headers`,
+         * they respectively default to:
+         *
+         * * `:method` \= `'GET'`
+         * * `:path` \= `/`
+         * @since v8.4.0
+         */
+        request(
+            headers?: OutgoingHttpHeaders | readonly string[],
+            options?: ClientSessionRequestOptions,
+        ): ClientHttp2Stream;
+        // #region InternalEventEmitter
+        addListener<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof ClientHttp2StreamEventMap>(eventName: E, ...args: ClientHttp2StreamEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener?: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+        ): ((...args: ClientHttp2StreamEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+        ): ((...args: ClientHttp2StreamEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof ClientHttp2StreamEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof ClientHttp2StreamEventMap>(
+            eventName: E,
+            listener: (...args: ClientHttp2StreamEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface AlternativeServiceOptions {
+        origin: number | string | url.URL;
+    }
+    interface ServerHttp2SessionEventMap<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    > extends Http2SessionEventMap {
+        "connect": [
+            session: ServerHttp2Session<Http1Request, Http1Response, Http2Request, Http2Response>,
+            socket: net.Socket | tls.TLSSocket,
+        ];
+        "stream": [stream: ServerHttp2Stream, headers: IncomingHttpHeaders, flags: number, rawHeaders: string[]];
+    }
+    interface ServerHttp2Session<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    > extends Http2Session {
+        readonly server:
+            | Http2Server<Http1Request, Http1Response, Http2Request, Http2Response>
+            | Http2SecureServer<Http1Request, Http1Response, Http2Request, Http2Response>;
+        /**
+         * Submits an `ALTSVC` frame (as defined by [RFC 7838](https://tools.ietf.org/html/rfc7838)) to the connected client.
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         *
+         * const server = http2.createServer();
+         * server.on('session', (session) => {
+         *   // Set altsvc for origin https://example.org:80
+         *   session.altsvc('h2=":8000"', 'https://example.org:80');
+         * });
+         *
+         * server.on('stream', (stream) => {
+         *   // Set altsvc for a specific stream
+         *   stream.session.altsvc('h2=":8000"', stream.id);
+         * });
+         * ```
+         *
+         * Sending an `ALTSVC` frame with a specific stream ID indicates that the alternate
+         * service is associated with the origin of the given `Http2Stream`.
+         *
+         * The `alt` and origin string _must_ contain only ASCII bytes and are
+         * strictly interpreted as a sequence of ASCII bytes. The special value `'clear'`may be passed to clear any previously set alternative service for a given
+         * domain.
+         *
+         * When a string is passed for the `originOrStream` argument, it will be parsed as
+         * a URL and the origin will be derived. For instance, the origin for the
+         * HTTP URL `'https://example.org/foo/bar'` is the ASCII string`'https://example.org'`. An error will be thrown if either the given string
+         * cannot be parsed as a URL or if a valid origin cannot be derived.
+         *
+         * A `URL` object, or any object with an `origin` property, may be passed as`originOrStream`, in which case the value of the `origin` property will be
+         * used. The value of the `origin` property _must_ be a properly serialized
+         * ASCII origin.
+         * @since v9.4.0
+         * @param alt A description of the alternative service configuration as defined by `RFC 7838`.
+         * @param originOrStream Either a URL string specifying the origin (or an `Object` with an `origin` property) or the numeric identifier of an active `Http2Stream` as given by the
+         * `http2stream.id` property.
+         */
+        altsvc(alt: string, originOrStream: number | string | url.URL | AlternativeServiceOptions): void;
+        /**
+         * Submits an `ORIGIN` frame (as defined by [RFC 8336](https://tools.ietf.org/html/rfc8336)) to the connected client
+         * to advertise the set of origins for which the server is capable of providing
+         * authoritative responses.
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * const options = getSecureOptionsSomehow();
+         * const server = http2.createSecureServer(options);
+         * server.on('stream', (stream) => {
+         *   stream.respond();
+         *   stream.end('ok');
+         * });
+         * server.on('session', (session) => {
+         *   session.origin('https://example.com', 'https://example.org');
+         * });
+         * ```
+         *
+         * When a string is passed as an `origin`, it will be parsed as a URL and the
+         * origin will be derived. For instance, the origin for the HTTP URL `'https://example.org/foo/bar'` is the ASCII string` 'https://example.org'`. An error will be thrown if either the given
+         * string
+         * cannot be parsed as a URL or if a valid origin cannot be derived.
+         *
+         * A `URL` object, or any object with an `origin` property, may be passed as
+         * an `origin`, in which case the value of the `origin` property will be
+         * used. The value of the `origin` property _must_ be a properly serialized
+         * ASCII origin.
+         *
+         * Alternatively, the `origins` option may be used when creating a new HTTP/2
+         * server using the `http2.createSecureServer()` method:
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * const options = getSecureOptionsSomehow();
+         * options.origins = ['https://example.com', 'https://example.org'];
+         * const server = http2.createSecureServer(options);
+         * server.on('stream', (stream) => {
+         *   stream.respond();
+         *   stream.end('ok');
+         * });
+         * ```
+         * @since v10.12.0
+         * @param origins One or more URL Strings passed as separate arguments.
+         */
+        origin(
+            ...origins: Array<
+                | string
+                | url.URL
+                | {
+                    origin: string;
+                }
+            >
+        ): void;
+        // #region InternalEventEmitter
+        addListener<E extends keyof ServerHttp2SessionEventMap>(
+            eventName: E,
+            listener: (
+                ...args: ServerHttp2SessionEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof ServerHttp2SessionEventMap>(
+            eventName: E,
+            ...args: ServerHttp2SessionEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+        ): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof ServerHttp2SessionEventMap>(
+            eventName: E,
+            listener?: (
+                ...args: ServerHttp2SessionEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof ServerHttp2SessionEventMap>(
+            eventName: E,
+        ): ((
+            ...args: ServerHttp2SessionEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+        ) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof ServerHttp2SessionEventMap>(
+            eventName: E,
+            listener: (
+                ...args: ServerHttp2SessionEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof ServerHttp2SessionEventMap>(
+            eventName: E,
+            listener: (
+                ...args: ServerHttp2SessionEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof ServerHttp2SessionEventMap>(
+            eventName: E,
+            listener: (
+                ...args: ServerHttp2SessionEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof ServerHttp2SessionEventMap>(
+            eventName: E,
+            listener: (
+                ...args: ServerHttp2SessionEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof ServerHttp2SessionEventMap>(
+            eventName: E,
+            listener: (
+                ...args: ServerHttp2SessionEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof ServerHttp2SessionEventMap>(
+            eventName: E,
+        ): ((
+            ...args: ServerHttp2SessionEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+        ) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof ServerHttp2SessionEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof ServerHttp2SessionEventMap>(
+            eventName: E,
+            listener: (
+                ...args: ServerHttp2SessionEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    // Http2Server
+    interface SessionOptions {
+        /**
+         * Sets the maximum dynamic table size for deflating header fields.
+         * @default 4Kib
+         */
+        maxDeflateDynamicTableSize?: number | undefined;
+        /**
+         * Sets the maximum number of settings entries per `SETTINGS` frame.
+         * The minimum value allowed is `1`.
+         * @default 32
+         */
+        maxSettings?: number | undefined;
+        /**
+         * Sets the maximum memory that the `Http2Session` is permitted to use.
+         * The value is expressed in terms of number of megabytes, e.g. `1` equal 1 megabyte.
+         * The minimum value allowed is `1`.
+         * This is a credit based limit, existing `Http2Stream`s may cause this limit to be exceeded,
+         * but new `Http2Stream` instances will be rejected while this limit is exceeded.
+         * The current number of `Http2Stream` sessions, the current memory use of the header compression tables,
+         * current data queued to be sent, and unacknowledged `PING` and `SETTINGS` frames are all counted towards the current limit.
+         * @default 10
+         */
+        maxSessionMemory?: number | undefined;
+        /**
+         * Sets the maximum number of header entries.
+         * This is similar to `server.maxHeadersCount` or `request.maxHeadersCount` in the `node:http` module.
+         * The minimum value is `1`.
+         * @default 128
+         */
+        maxHeaderListPairs?: number | undefined;
+        /**
+         * Sets the maximum number of outstanding, unacknowledged pings.
+         * @default 10
+         */
+        maxOutstandingPings?: number | undefined;
+        /**
+         * Sets the maximum allowed size for a serialized, compressed block of headers.
+         * Attempts to send headers that exceed this limit will result in
+         * a `'frameError'` event being emitted and the stream being closed and destroyed.
+         */
+        maxSendHeaderBlockLength?: number | undefined;
+        /**
+         * Strategy used for determining the amount of padding to use for `HEADERS` and `DATA` frames.
+         * @default http2.constants.PADDING_STRATEGY_NONE
+         */
+        paddingStrategy?: number | undefined;
+        /**
+         * Sets the maximum number of concurrent streams for the remote peer as if a `SETTINGS` frame had been received.
+         * Will be overridden if the remote peer sets its own value for `maxConcurrentStreams`.
+         * @default 100
+         */
+        peerMaxConcurrentStreams?: number | undefined;
+        /**
+         * The initial settings to send to the remote peer upon connection.
+         */
+        settings?: Settings | undefined;
+        /**
+         * The array of integer values determines the settings types,
+         * which are included in the `CustomSettings`-property of the received remoteSettings.
+         * Please see the `CustomSettings`-property of the `Http2Settings` object for more information, on the allowed setting types.
+         */
+        remoteCustomSettings?: number[] | undefined;
+        /**
+         * Specifies a timeout in milliseconds that
+         * a server should wait when an [`'unknownProtocol'`][] is emitted. If the
+         * socket has not been destroyed by that time the server will destroy it.
+         * @default 100000
+         */
+        unknownProtocolTimeout?: number | undefined;
+        /**
+         * If `true`, it turns on strict leading
+         * and trailing whitespace validation for HTTP/2 header field names and values
+         * as per [RFC-9113](https://www.rfc-editor.org/rfc/rfc9113.html#section-8.2.1).
+         * @since v24.2.0
+         * @default true
+         */
+        strictFieldWhitespaceValidation?: boolean | undefined;
+    }
+    interface ClientSessionOptions extends SessionOptions {
+        /**
+         * Sets the maximum number of reserved push streams the client will accept at any given time.
+         * Once the current number of currently reserved push streams exceeds reaches this limit,
+         * new push streams sent by the server will be automatically rejected.
+         * The minimum allowed value is 0. The maximum allowed value is 2<sup>32</sup>-1.
+         * A negative value sets this option to the maximum allowed value.
+         * @default 200
+         */
+        maxReservedRemoteStreams?: number | undefined;
+        /**
+         * An optional callback that receives the `URL` instance passed to `connect` and the `options` object,
+         * and returns any `Duplex` stream that is to be used as the connection for this session.
+         */
+        createConnection?: ((authority: url.URL, option: SessionOptions) => stream.Duplex) | undefined;
+        /**
+         * The protocol to connect with, if not set in the `authority`.
+         * Value may be either `'http:'` or `'https:'`.
+         * @default 'https:'
+         */
+        protocol?: "http:" | "https:" | undefined;
+    }
+    interface ServerSessionOptions<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    > extends SessionOptions {
+        streamResetBurst?: number | undefined;
+        streamResetRate?: number | undefined;
+        Http1IncomingMessage?: Http1Request | undefined;
+        Http1ServerResponse?: Http1Response | undefined;
+        Http2ServerRequest?: Http2Request | undefined;
+        Http2ServerResponse?: Http2Response | undefined;
+    }
+    interface SecureClientSessionOptions extends ClientSessionOptions, tls.ConnectionOptions {}
+    interface SecureServerSessionOptions<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    > extends ServerSessionOptions<Http1Request, Http1Response, Http2Request, Http2Response>, tls.TlsOptions {}
+    interface ServerOptions<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    > extends ServerSessionOptions<Http1Request, Http1Response, Http2Request, Http2Response> {}
+    interface SecureServerOptions<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    > extends SecureServerSessionOptions<Http1Request, Http1Response, Http2Request, Http2Response> {
+        allowHTTP1?: boolean | undefined;
+        origins?: string[] | undefined;
+    }
+    interface Http2ServerCommon {
+        setTimeout(msec?: number, callback?: () => void): this;
+        /**
+         * Throws ERR_HTTP2_INVALID_SETTING_VALUE for invalid settings values.
+         * Throws ERR_INVALID_ARG_TYPE for invalid settings argument.
+         */
+        updateSettings(settings: Settings): void;
+    }
+    interface Http2ServerEventMap<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    > extends net.ServerEventMap, Pick<Http2SessionEventMap, "stream" | "timeout"> {
+        "checkContinue": [request: InstanceType<Http2Request>, response: InstanceType<Http2Response>];
+        "request": [request: InstanceType<Http2Request>, response: InstanceType<Http2Response>];
+        "session": [session: ServerHttp2Session<Http1Request, Http1Response, Http2Request, Http2Response>];
+        "sessionError": [err: Error];
+    }
+    interface Http2Server<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    > extends net.Server, Http2ServerCommon {
+        // #region InternalEventEmitter
+        addListener<E extends keyof Http2ServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof Http2ServerEventMap>(
+            eventName: E,
+            ...args: Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+        ): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof Http2ServerEventMap>(
+            eventName: E,
+            listener?: (
+                ...args: Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof Http2ServerEventMap>(
+            eventName: E,
+        ): ((...args: Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof Http2ServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof Http2ServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof Http2ServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof Http2ServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof Http2ServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof Http2ServerEventMap>(
+            eventName: E,
+        ): ((...args: Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof Http2ServerEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof Http2ServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface Http2SecureServerEventMap<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    > extends tls.ServerEventMap, Http2ServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response> {
+        "unknownProtocol": [socket: tls.TLSSocket];
+    }
+    interface Http2SecureServer<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    > extends tls.Server, Http2ServerCommon {
+        // #region InternalEventEmitter
+        addListener<E extends keyof Http2SecureServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2SecureServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof Http2SecureServerEventMap>(
+            eventName: E,
+            ...args: Http2SecureServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+        ): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof Http2SecureServerEventMap>(
+            eventName: E,
+            listener?: (
+                ...args: Http2SecureServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof Http2SecureServerEventMap>(
+            eventName: E,
+        ): ((
+            ...args: Http2SecureServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+        ) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof Http2SecureServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2SecureServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof Http2SecureServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2SecureServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof Http2SecureServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2SecureServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof Http2SecureServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2SecureServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof Http2SecureServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2SecureServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof Http2SecureServerEventMap>(
+            eventName: E,
+        ): ((
+            ...args: Http2SecureServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+        ) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof Http2SecureServerEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof Http2SecureServerEventMap>(
+            eventName: E,
+            listener: (
+                ...args: Http2SecureServerEventMap<Http1Request, Http1Response, Http2Request, Http2Response>[E]
+            ) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface Http2ServerRequestEventMap extends stream.ReadableEventMap {
+        "aborted": [hadError: boolean, code: number];
+        "data": [chunk: string | NonSharedBuffer];
+    }
+    /**
+     * A `Http2ServerRequest` object is created by {@link Server} or {@link SecureServer} and passed as the first argument to the `'request'` event. It may be used to access a request status,
+     * headers, and
+     * data.
+     * @since v8.4.0
+     */
+    class Http2ServerRequest extends stream.Readable {
+        constructor(
+            stream: ServerHttp2Stream,
+            headers: IncomingHttpHeaders,
+            options: stream.ReadableOptions,
+            rawHeaders: readonly string[],
+        );
+        /**
+         * The `request.aborted` property will be `true` if the request has
+         * been aborted.
+         * @since v10.1.0
+         */
+        readonly aborted: boolean;
+        /**
+         * The request authority pseudo header field. Because HTTP/2 allows requests
+         * to set either `:authority` or `host`, this value is derived from `req.headers[':authority']` if present. Otherwise, it is derived from `req.headers['host']`.
+         * @since v8.4.0
+         */
+        readonly authority: string;
+        /**
+         * See `request.socket`.
+         * @since v8.4.0
+         * @deprecated Since v13.0.0 - Use `socket`.
+         */
+        readonly connection: net.Socket | tls.TLSSocket;
+        /**
+         * The `request.complete` property will be `true` if the request has
+         * been completed, aborted, or destroyed.
+         * @since v12.10.0
+         */
+        readonly complete: boolean;
+        /**
+         * The request/response headers object.
+         *
+         * Key-value pairs of header names and values. Header names are lower-cased.
+         *
+         * ```js
+         * // Prints something like:
+         * //
+         * // { 'user-agent': 'curl/7.22.0',
+         * //   host: '127.0.0.1:8000',
+         * //   accept: '*' }
+         * console.log(request.headers);
+         * ```
+         *
+         * See `HTTP/2 Headers Object`.
+         *
+         * In HTTP/2, the request path, host name, protocol, and method are represented as
+         * special headers prefixed with the `:` character (e.g. `':path'`). These special
+         * headers will be included in the `request.headers` object. Care must be taken not
+         * to inadvertently modify these special headers or errors may occur. For instance,
+         * removing all headers from the request will cause errors to occur:
+         *
+         * ```js
+         * removeAllHeaders(request.headers);
+         * assert(request.url);   // Fails because the :path header has been removed
+         * ```
+         * @since v8.4.0
+         */
+        readonly headers: IncomingHttpHeaders;
+        /**
+         * In case of server request, the HTTP version sent by the client. In the case of
+         * client response, the HTTP version of the connected-to server. Returns `'2.0'`.
+         *
+         * Also `message.httpVersionMajor` is the first integer and `message.httpVersionMinor` is the second.
+         * @since v8.4.0
+         */
+        readonly httpVersion: string;
+        readonly httpVersionMinor: number;
+        readonly httpVersionMajor: number;
+        /**
+         * The request method as a string. Read-only. Examples: `'GET'`, `'DELETE'`.
+         * @since v8.4.0
+         */
+        readonly method: string;
+        /**
+         * The raw request/response headers list exactly as they were received.
+         *
+         * The keys and values are in the same list. It is _not_ a
+         * list of tuples. So, the even-numbered offsets are key values, and the
+         * odd-numbered offsets are the associated values.
+         *
+         * Header names are not lowercased, and duplicates are not merged.
+         *
+         * ```js
+         * // Prints something like:
+         * //
+         * // [ 'user-agent',
+         * //   'this is invalid because there can be only one',
+         * //   'User-Agent',
+         * //   'curl/7.22.0',
+         * //   'Host',
+         * //   '127.0.0.1:8000',
+         * //   'ACCEPT',
+         * //   '*' ]
+         * console.log(request.rawHeaders);
+         * ```
+         * @since v8.4.0
+         */
+        readonly rawHeaders: string[];
+        /**
+         * The raw request/response trailer keys and values exactly as they were
+         * received. Only populated at the `'end'` event.
+         * @since v8.4.0
+         */
+        readonly rawTrailers: string[];
+        /**
+         * The request scheme pseudo header field indicating the scheme
+         * portion of the target URL.
+         * @since v8.4.0
+         */
+        readonly scheme: string;
+        /**
+         * Returns a `Proxy` object that acts as a `net.Socket` (or `tls.TLSSocket`) but
+         * applies getters, setters, and methods based on HTTP/2 logic.
+         *
+         * `destroyed`, `readable`, and `writable` properties will be retrieved from and
+         * set on `request.stream`.
+         *
+         * `destroy`, `emit`, `end`, `on` and `once` methods will be called on `request.stream`.
+         *
+         * `setTimeout` method will be called on `request.stream.session`.
+         *
+         * `pause`, `read`, `resume`, and `write` will throw an error with code `ERR_HTTP2_NO_SOCKET_MANIPULATION`. See `Http2Session and Sockets` for
+         * more information.
+         *
+         * All other interactions will be routed directly to the socket. With TLS support,
+         * use `request.socket.getPeerCertificate()` to obtain the client's
+         * authentication details.
+         * @since v8.4.0
+         */
+        readonly socket: net.Socket | tls.TLSSocket;
+        /**
+         * The `Http2Stream` object backing the request.
+         * @since v8.4.0
+         */
+        readonly stream: ServerHttp2Stream;
+        /**
+         * The request/response trailers object. Only populated at the `'end'` event.
+         * @since v8.4.0
+         */
+        readonly trailers: IncomingHttpHeaders;
+        /**
+         * Request URL string. This contains only the URL that is present in the actual
+         * HTTP request. If the request is:
+         *
+         * ```http
+         * GET /status?name=ryan HTTP/1.1
+         * Accept: text/plain
+         * ```
+         *
+         * Then `request.url` will be:
+         *
+         * ```js
+         * '/status?name=ryan'
+         * ```
+         *
+         * To parse the url into its parts, `new URL()` can be used:
+         *
+         * ```console
+         * $ node
+         * > new URL('/status?name=ryan', 'http://example.com')
+         * URL {
+         *   href: 'http://example.com/status?name=ryan',
+         *   origin: 'http://example.com',
+         *   protocol: 'http:',
+         *   username: '',
+         *   password: '',
+         *   host: 'example.com',
+         *   hostname: 'example.com',
+         *   port: '',
+         *   pathname: '/status',
+         *   search: '?name=ryan',
+         *   searchParams: URLSearchParams { 'name' => 'ryan' },
+         *   hash: ''
+         * }
+         * ```
+         * @since v8.4.0
+         */
+        url: string;
+        /**
+         * Sets the `Http2Stream`'s timeout value to `msecs`. If a callback is
+         * provided, then it is added as a listener on the `'timeout'` event on
+         * the response object.
+         *
+         * If no `'timeout'` listener is added to the request, the response, or
+         * the server, then `Http2Stream`s are destroyed when they time out. If a
+         * handler is assigned to the request, the response, or the server's `'timeout'`events, timed out sockets must be handled explicitly.
+         * @since v8.4.0
+         */
+        setTimeout(msecs: number, callback?: () => void): void;
+        read(size?: number): Buffer | string | null;
+        // #region InternalEventEmitter
+        addListener<E extends keyof Http2ServerRequestEventMap>(
+            eventName: E,
+            listener: (...args: Http2ServerRequestEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof Http2ServerRequestEventMap>(eventName: E, ...args: Http2ServerRequestEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof Http2ServerRequestEventMap>(
+            eventName: E,
+            listener?: (...args: Http2ServerRequestEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof Http2ServerRequestEventMap>(
+            eventName: E,
+        ): ((...args: Http2ServerRequestEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof Http2ServerRequestEventMap>(
+            eventName: E,
+            listener: (...args: Http2ServerRequestEventMap[E]) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof Http2ServerRequestEventMap>(
+            eventName: E,
+            listener: (...args: Http2ServerRequestEventMap[E]) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof Http2ServerRequestEventMap>(
+            eventName: E,
+            listener: (...args: Http2ServerRequestEventMap[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof Http2ServerRequestEventMap>(
+            eventName: E,
+            listener: (...args: Http2ServerRequestEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof Http2ServerRequestEventMap>(
+            eventName: E,
+            listener: (...args: Http2ServerRequestEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof Http2ServerRequestEventMap>(
+            eventName: E,
+        ): ((...args: Http2ServerRequestEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof Http2ServerRequestEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof Http2ServerRequestEventMap>(
+            eventName: E,
+            listener: (...args: Http2ServerRequestEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    /**
+     * This object is created internally by an HTTP server, not by the user. It is
+     * passed as the second parameter to the `'request'` event.
+     * @since v8.4.0
+     */
+    class Http2ServerResponse<Request extends Http2ServerRequest = Http2ServerRequest> extends stream.Writable {
+        constructor(stream: ServerHttp2Stream);
+        /**
+         * See `response.socket`.
+         * @since v8.4.0
+         * @deprecated Since v13.0.0 - Use `socket`.
+         */
+        readonly connection: net.Socket | tls.TLSSocket;
+        /**
+         * Append a single header value to the header object.
+         *
+         * If the value is an array, this is equivalent to calling this method multiple times.
+         *
+         * If there were no previous values for the header, this is equivalent to calling {@link setHeader}.
+         *
+         * Attempting to set a header field name or value that contains invalid characters will result in a
+         * [TypeError](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-typeerror) being thrown.
+         *
+         * ```js
+         * // Returns headers including "set-cookie: a" and "set-cookie: b"
+         * const server = http2.createServer((req, res) => {
+         *   res.setHeader('set-cookie', 'a');
+         *   res.appendHeader('set-cookie', 'b');
+         *   res.writeHead(200);
+         *   res.end('ok');
+         * });
+         * ```
+         * @since v20.12.0
+         */
+        appendHeader(name: string, value: string | string[]): void;
+        /**
+         * Boolean value that indicates whether the response has completed. Starts
+         * as `false`. After `response.end()` executes, the value will be `true`.
+         * @since v8.4.0
+         * @deprecated Since v13.4.0,v12.16.0 - Use `writableEnded`.
+         */
+        readonly finished: boolean;
+        /**
+         * True if headers were sent, false otherwise (read-only).
+         * @since v8.4.0
+         */
+        readonly headersSent: boolean;
+        /**
+         * A reference to the original HTTP2 `request` object.
+         * @since v15.7.0
+         */
+        readonly req: Request;
+        /**
+         * Returns a `Proxy` object that acts as a `net.Socket` (or `tls.TLSSocket`) but
+         * applies getters, setters, and methods based on HTTP/2 logic.
+         *
+         * `destroyed`, `readable`, and `writable` properties will be retrieved from and
+         * set on `response.stream`.
+         *
+         * `destroy`, `emit`, `end`, `on` and `once` methods will be called on `response.stream`.
+         *
+         * `setTimeout` method will be called on `response.stream.session`.
+         *
+         * `pause`, `read`, `resume`, and `write` will throw an error with code `ERR_HTTP2_NO_SOCKET_MANIPULATION`. See `Http2Session and Sockets` for
+         * more information.
+         *
+         * All other interactions will be routed directly to the socket.
+         *
+         * ```js
+         * import http2 from 'node:http2';
+         * const server = http2.createServer((req, res) => {
+         *   const ip = req.socket.remoteAddress;
+         *   const port = req.socket.remotePort;
+         *   res.end(`Your IP address is ${ip} and your source port is ${port}.`);
+         * }).listen(3000);
+         * ```
+         * @since v8.4.0
+         */
+        readonly socket: net.Socket | tls.TLSSocket;
+        /**
+         * The `Http2Stream` object backing the response.
+         * @since v8.4.0
+         */
+        readonly stream: ServerHttp2Stream;
+        /**
+         * When true, the Date header will be automatically generated and sent in
+         * the response if it is not already present in the headers. Defaults to true.
+         *
+         * This should only be disabled for testing; HTTP requires the Date header
+         * in responses.
+         * @since v8.4.0
+         */
+        sendDate: boolean;
+        /**
+         * When using implicit headers (not calling `response.writeHead()` explicitly),
+         * this property controls the status code that will be sent to the client when
+         * the headers get flushed.
+         *
+         * ```js
+         * response.statusCode = 404;
+         * ```
+         *
+         * After response header was sent to the client, this property indicates the
+         * status code which was sent out.
+         * @since v8.4.0
+         */
+        statusCode: number;
+        /**
+         * Status message is not supported by HTTP/2 (RFC 7540 8.1.2.4). It returns
+         * an empty string.
+         * @since v8.4.0
+         */
+        statusMessage: "";
+        /**
+         * This method adds HTTP trailing headers (a header but at the end of the
+         * message) to the response.
+         *
+         * Attempting to set a header field name or value that contains invalid characters
+         * will result in a `TypeError` being thrown.
+         * @since v8.4.0
+         */
+        addTrailers(trailers: OutgoingHttpHeaders): void;
+        /**
+         * This method signals to the server that all of the response headers and body
+         * have been sent; that server should consider this message complete.
+         * The method, `response.end()`, MUST be called on each response.
+         *
+         * If `data` is specified, it is equivalent to calling `response.write(data, encoding)` followed by `response.end(callback)`.
+         *
+         * If `callback` is specified, it will be called when the response stream
+         * is finished.
+         * @since v8.4.0
+         */
+        end(callback?: () => void): this;
+        end(data: string | Uint8Array, callback?: () => void): this;
+        end(data: string | Uint8Array, encoding: BufferEncoding, callback?: () => void): this;
+        /**
+         * Reads out a header that has already been queued but not sent to the client.
+         * The name is case-insensitive.
+         *
+         * ```js
+         * const contentType = response.getHeader('content-type');
+         * ```
+         * @since v8.4.0
+         */
+        getHeader(name: string): string;
+        /**
+         * Returns an array containing the unique names of the current outgoing headers.
+         * All header names are lowercase.
+         *
+         * ```js
+         * response.setHeader('Foo', 'bar');
+         * response.setHeader('Set-Cookie', ['foo=bar', 'bar=baz']);
+         *
+         * const headerNames = response.getHeaderNames();
+         * // headerNames === ['foo', 'set-cookie']
+         * ```
+         * @since v8.4.0
+         */
+        getHeaderNames(): string[];
+        /**
+         * Returns a shallow copy of the current outgoing headers. Since a shallow copy
+         * is used, array values may be mutated without additional calls to various
+         * header-related http module methods. The keys of the returned object are the
+         * header names and the values are the respective header values. All header names
+         * are lowercase.
+         *
+         * The object returned by the `response.getHeaders()` method _does not_ prototypically inherit from the JavaScript `Object`. This means that typical `Object` methods such as `obj.toString()`,
+         * `obj.hasOwnProperty()`, and others
+         * are not defined and _will not work_.
+         *
+         * ```js
+         * response.setHeader('Foo', 'bar');
+         * response.setHeader('Set-Cookie', ['foo=bar', 'bar=baz']);
+         *
+         * const headers = response.getHeaders();
+         * // headers === { foo: 'bar', 'set-cookie': ['foo=bar', 'bar=baz'] }
+         * ```
+         * @since v8.4.0
+         */
+        getHeaders(): OutgoingHttpHeaders;
+        /**
+         * Returns `true` if the header identified by `name` is currently set in the
+         * outgoing headers. The header name matching is case-insensitive.
+         *
+         * ```js
+         * const hasContentType = response.hasHeader('content-type');
+         * ```
+         * @since v8.4.0
+         */
+        hasHeader(name: string): boolean;
+        /**
+         * Removes a header that has been queued for implicit sending.
+         *
+         * ```js
+         * response.removeHeader('Content-Encoding');
+         * ```
+         * @since v8.4.0
+         */
+        removeHeader(name: string): void;
+        /**
+         * Sets a single header value for implicit headers. If this header already exists
+         * in the to-be-sent headers, its value will be replaced. Use an array of strings
+         * here to send multiple headers with the same name.
+         *
+         * ```js
+         * response.setHeader('Content-Type', 'text/html; charset=utf-8');
+         * ```
+         *
+         * or
+         *
+         * ```js
+         * response.setHeader('Set-Cookie', ['type=ninja', 'language=javascript']);
+         * ```
+         *
+         * Attempting to set a header field name or value that contains invalid characters
+         * will result in a `TypeError` being thrown.
+         *
+         * When headers have been set with `response.setHeader()`, they will be merged
+         * with any headers passed to `response.writeHead()`, with the headers passed
+         * to `response.writeHead()` given precedence.
+         *
+         * ```js
+         * // Returns content-type = text/plain
+         * const server = http2.createServer((req, res) => {
+         *   res.setHeader('Content-Type', 'text/html; charset=utf-8');
+         *   res.setHeader('X-Foo', 'bar');
+         *   res.writeHead(200, { 'Content-Type': 'text/plain; charset=utf-8' });
+         *   res.end('ok');
+         * });
+         * ```
+         * @since v8.4.0
+         */
+        setHeader(name: string, value: number | string | readonly string[]): void;
+        /**
+         * Sets the `Http2Stream`'s timeout value to `msecs`. If a callback is
+         * provided, then it is added as a listener on the `'timeout'` event on
+         * the response object.
+         *
+         * If no `'timeout'` listener is added to the request, the response, or
+         * the server, then `Http2Stream` s are destroyed when they time out. If a
+         * handler is assigned to the request, the response, or the server's `'timeout'` events, timed out sockets must be handled explicitly.
+         * @since v8.4.0
+         */
+        setTimeout(msecs: number, callback?: () => void): void;
+        /**
+         * If this method is called and `response.writeHead()` has not been called,
+         * it will switch to implicit header mode and flush the implicit headers.
+         *
+         * This sends a chunk of the response body. This method may
+         * be called multiple times to provide successive parts of the body.
+         *
+         * In the `node:http` module, the response body is omitted when the
+         * request is a HEAD request. Similarly, the `204` and `304` responses _must not_ include a message body.
+         *
+         * `chunk` can be a string or a buffer. If `chunk` is a string,
+         * the second parameter specifies how to encode it into a byte stream.
+         * By default the `encoding` is `'utf8'`. `callback` will be called when this chunk
+         * of data is flushed.
+         *
+         * This is the raw HTTP body and has nothing to do with higher-level multi-part
+         * body encodings that may be used.
+         *
+         * The first time `response.write()` is called, it will send the buffered
+         * header information and the first chunk of the body to the client. The second
+         * time `response.write()` is called, Node.js assumes data will be streamed,
+         * and sends the new data separately. That is, the response is buffered up to the
+         * first chunk of the body.
+         *
+         * Returns `true` if the entire data was flushed successfully to the kernel
+         * buffer. Returns `false` if all or part of the data was queued in user memory.`'drain'` will be emitted when the buffer is free again.
+         * @since v8.4.0
+         */
+        write(chunk: string | Uint8Array, callback?: (err: Error) => void): boolean;
+        write(chunk: string | Uint8Array, encoding: BufferEncoding, callback?: (err: Error) => void): boolean;
+        /**
+         * Sends a status `100 Continue` to the client, indicating that the request body
+         * should be sent. See the `'checkContinue'` event on `Http2Server` and `Http2SecureServer`.
+         * @since v8.4.0
+         */
+        writeContinue(): void;
+        /**
+         * Sends a status `103 Early Hints` to the client with a Link header,
+         * indicating that the user agent can preload/preconnect the linked resources.
+         * The `hints` is an object containing the values of headers to be sent with
+         * early hints message.
+         *
+         * **Example**
+         *
+         * ```js
+         * const earlyHintsLink = '</styles.css>; rel=preload; as=style';
+         * response.writeEarlyHints({
+         *   'link': earlyHintsLink,
+         * });
+         *
+         * const earlyHintsLinks = [
+         *   '</styles.css>; rel=preload; as=style',
+         *   '</scripts.js>; rel=preload; as=script',
+         * ];
+         * response.writeEarlyHints({
+         *   'link': earlyHintsLinks,
+         * });
+         * ```
+         * @since v18.11.0
+         */
+        writeEarlyHints(hints: Record<string, string | string[]>): void;
+        /**
+         * Sends a response header to the request. The status code is a 3-digit HTTP
+         * status code, like `404`. The last argument, `headers`, are the response headers.
+         *
+         * Returns a reference to the `Http2ServerResponse`, so that calls can be chained.
+         *
+         * For compatibility with `HTTP/1`, a human-readable `statusMessage` may be
+         * passed as the second argument. However, because the `statusMessage` has no
+         * meaning within HTTP/2, the argument will have no effect and a process warning
+         * will be emitted.
+         *
+         * ```js
+         * const body = 'hello world';
+         * response.writeHead(200, {
+         *   'Content-Length': Buffer.byteLength(body),
+         *   'Content-Type': 'text/plain; charset=utf-8',
+         * });
+         * ```
+         *
+         * `Content-Length` is given in bytes not characters. The`Buffer.byteLength()` API may be used to determine the number of bytes in a
+         * given encoding. On outbound messages, Node.js does not check if Content-Length
+         * and the length of the body being transmitted are equal or not. However, when
+         * receiving messages, Node.js will automatically reject messages when the `Content-Length` does not match the actual payload size.
+         *
+         * This method may be called at most one time on a message before `response.end()` is called.
+         *
+         * If `response.write()` or `response.end()` are called before calling
+         * this, the implicit/mutable headers will be calculated and call this function.
+         *
+         * When headers have been set with `response.setHeader()`, they will be merged
+         * with any headers passed to `response.writeHead()`, with the headers passed
+         * to `response.writeHead()` given precedence.
+         *
+         * ```js
+         * // Returns content-type = text/plain
+         * const server = http2.createServer((req, res) => {
+         *   res.setHeader('Content-Type', 'text/html; charset=utf-8');
+         *   res.setHeader('X-Foo', 'bar');
+         *   res.writeHead(200, { 'Content-Type': 'text/plain; charset=utf-8' });
+         *   res.end('ok');
+         * });
+         * ```
+         *
+         * Attempting to set a header field name or value that contains invalid characters
+         * will result in a `TypeError` being thrown.
+         * @since v8.4.0
+         */
+        writeHead(statusCode: number, headers?: OutgoingHttpHeaders | readonly string[]): this;
+        writeHead(statusCode: number, statusMessage: string, headers?: OutgoingHttpHeaders | readonly string[]): this;
+        /**
+         * Call `http2stream.pushStream()` with the given headers, and wrap the
+         * given `Http2Stream` on a newly created `Http2ServerResponse` as the callback
+         * parameter if successful. When `Http2ServerRequest` is closed, the callback is
+         * called with an error `ERR_HTTP2_INVALID_STREAM`.
+         * @since v8.4.0
+         * @param headers An object describing the headers
+         * @param callback Called once `http2stream.pushStream()` is finished, or either when the attempt to create the pushed `Http2Stream` has failed or has been rejected, or the state of
+         * `Http2ServerRequest` is closed prior to calling the `http2stream.pushStream()` method
+         */
+        createPushResponse(
+            headers: OutgoingHttpHeaders,
+            callback: (err: Error | null, res: Http2ServerResponse) => void,
+        ): void;
+    }
+    namespace constants {
+        const NGHTTP2_SESSION_SERVER: number;
+        const NGHTTP2_SESSION_CLIENT: number;
+        const NGHTTP2_STREAM_STATE_IDLE: number;
+        const NGHTTP2_STREAM_STATE_OPEN: number;
+        const NGHTTP2_STREAM_STATE_RESERVED_LOCAL: number;
+        const NGHTTP2_STREAM_STATE_RESERVED_REMOTE: number;
+        const NGHTTP2_STREAM_STATE_HALF_CLOSED_LOCAL: number;
+        const NGHTTP2_STREAM_STATE_HALF_CLOSED_REMOTE: number;
+        const NGHTTP2_STREAM_STATE_CLOSED: number;
+        const NGHTTP2_NO_ERROR: number;
+        const NGHTTP2_PROTOCOL_ERROR: number;
+        const NGHTTP2_INTERNAL_ERROR: number;
+        const NGHTTP2_FLOW_CONTROL_ERROR: number;
+        const NGHTTP2_SETTINGS_TIMEOUT: number;
+        const NGHTTP2_STREAM_CLOSED: number;
+        const NGHTTP2_FRAME_SIZE_ERROR: number;
+        const NGHTTP2_REFUSED_STREAM: number;
+        const NGHTTP2_CANCEL: number;
+        const NGHTTP2_COMPRESSION_ERROR: number;
+        const NGHTTP2_CONNECT_ERROR: number;
+        const NGHTTP2_ENHANCE_YOUR_CALM: number;
+        const NGHTTP2_INADEQUATE_SECURITY: number;
+        const NGHTTP2_HTTP_1_1_REQUIRED: number;
+        const NGHTTP2_ERR_FRAME_SIZE_ERROR: number;
+        const NGHTTP2_FLAG_NONE: number;
+        const NGHTTP2_FLAG_END_STREAM: number;
+        const NGHTTP2_FLAG_END_HEADERS: number;
+        const NGHTTP2_FLAG_ACK: number;
+        const NGHTTP2_FLAG_PADDED: number;
+        const NGHTTP2_FLAG_PRIORITY: number;
+        const DEFAULT_SETTINGS_HEADER_TABLE_SIZE: number;
+        const DEFAULT_SETTINGS_ENABLE_PUSH: number;
+        const DEFAULT_SETTINGS_INITIAL_WINDOW_SIZE: number;
+        const DEFAULT_SETTINGS_MAX_FRAME_SIZE: number;
+        const MAX_MAX_FRAME_SIZE: number;
+        const MIN_MAX_FRAME_SIZE: number;
+        const MAX_INITIAL_WINDOW_SIZE: number;
+        const NGHTTP2_DEFAULT_WEIGHT: number;
+        const NGHTTP2_SETTINGS_HEADER_TABLE_SIZE: number;
+        const NGHTTP2_SETTINGS_ENABLE_PUSH: number;
+        const NGHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS: number;
+        const NGHTTP2_SETTINGS_INITIAL_WINDOW_SIZE: number;
+        const NGHTTP2_SETTINGS_MAX_FRAME_SIZE: number;
+        const NGHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE: number;
+        const PADDING_STRATEGY_NONE: number;
+        const PADDING_STRATEGY_MAX: number;
+        const PADDING_STRATEGY_CALLBACK: number;
+        const HTTP2_HEADER_STATUS: string;
+        const HTTP2_HEADER_METHOD: string;
+        const HTTP2_HEADER_AUTHORITY: string;
+        const HTTP2_HEADER_SCHEME: string;
+        const HTTP2_HEADER_PATH: string;
+        const HTTP2_HEADER_ACCEPT_CHARSET: string;
+        const HTTP2_HEADER_ACCEPT_ENCODING: string;
+        const HTTP2_HEADER_ACCEPT_LANGUAGE: string;
+        const HTTP2_HEADER_ACCEPT_RANGES: string;
+        const HTTP2_HEADER_ACCEPT: string;
+        const HTTP2_HEADER_ACCESS_CONTROL_ALLOW_CREDENTIALS: string;
+        const HTTP2_HEADER_ACCESS_CONTROL_ALLOW_HEADERS: string;
+        const HTTP2_HEADER_ACCESS_CONTROL_ALLOW_METHODS: string;
+        const HTTP2_HEADER_ACCESS_CONTROL_ALLOW_ORIGIN: string;
+        const HTTP2_HEADER_ACCESS_CONTROL_EXPOSE_HEADERS: string;
+        const HTTP2_HEADER_ACCESS_CONTROL_REQUEST_HEADERS: string;
+        const HTTP2_HEADER_ACCESS_CONTROL_REQUEST_METHOD: string;
+        const HTTP2_HEADER_AGE: string;
+        const HTTP2_HEADER_ALLOW: string;
+        const HTTP2_HEADER_AUTHORIZATION: string;
+        const HTTP2_HEADER_CACHE_CONTROL: string;
+        const HTTP2_HEADER_CONNECTION: string;
+        const HTTP2_HEADER_CONTENT_DISPOSITION: string;
+        const HTTP2_HEADER_CONTENT_ENCODING: string;
+        const HTTP2_HEADER_CONTENT_LANGUAGE: string;
+        const HTTP2_HEADER_CONTENT_LENGTH: string;
+        const HTTP2_HEADER_CONTENT_LOCATION: string;
+        const HTTP2_HEADER_CONTENT_MD5: string;
+        const HTTP2_HEADER_CONTENT_RANGE: string;
+        const HTTP2_HEADER_CONTENT_TYPE: string;
+        const HTTP2_HEADER_COOKIE: string;
+        const HTTP2_HEADER_DATE: string;
+        const HTTP2_HEADER_ETAG: string;
+        const HTTP2_HEADER_EXPECT: string;
+        const HTTP2_HEADER_EXPIRES: string;
+        const HTTP2_HEADER_FROM: string;
+        const HTTP2_HEADER_HOST: string;
+        const HTTP2_HEADER_IF_MATCH: string;
+        const HTTP2_HEADER_IF_MODIFIED_SINCE: string;
+        const HTTP2_HEADER_IF_NONE_MATCH: string;
+        const HTTP2_HEADER_IF_RANGE: string;
+        const HTTP2_HEADER_IF_UNMODIFIED_SINCE: string;
+        const HTTP2_HEADER_LAST_MODIFIED: string;
+        const HTTP2_HEADER_LINK: string;
+        const HTTP2_HEADER_LOCATION: string;
+        const HTTP2_HEADER_MAX_FORWARDS: string;
+        const HTTP2_HEADER_PREFER: string;
+        const HTTP2_HEADER_PROXY_AUTHENTICATE: string;
+        const HTTP2_HEADER_PROXY_AUTHORIZATION: string;
+        const HTTP2_HEADER_RANGE: string;
+        const HTTP2_HEADER_REFERER: string;
+        const HTTP2_HEADER_REFRESH: string;
+        const HTTP2_HEADER_RETRY_AFTER: string;
+        const HTTP2_HEADER_SERVER: string;
+        const HTTP2_HEADER_SET_COOKIE: string;
+        const HTTP2_HEADER_STRICT_TRANSPORT_SECURITY: string;
+        const HTTP2_HEADER_TRANSFER_ENCODING: string;
+        const HTTP2_HEADER_TE: string;
+        const HTTP2_HEADER_UPGRADE: string;
+        const HTTP2_HEADER_USER_AGENT: string;
+        const HTTP2_HEADER_VARY: string;
+        const HTTP2_HEADER_VIA: string;
+        const HTTP2_HEADER_WWW_AUTHENTICATE: string;
+        const HTTP2_HEADER_HTTP2_SETTINGS: string;
+        const HTTP2_HEADER_KEEP_ALIVE: string;
+        const HTTP2_HEADER_PROXY_CONNECTION: string;
+        const HTTP2_METHOD_ACL: string;
+        const HTTP2_METHOD_BASELINE_CONTROL: string;
+        const HTTP2_METHOD_BIND: string;
+        const HTTP2_METHOD_CHECKIN: string;
+        const HTTP2_METHOD_CHECKOUT: string;
+        const HTTP2_METHOD_CONNECT: string;
+        const HTTP2_METHOD_COPY: string;
+        const HTTP2_METHOD_DELETE: string;
+        const HTTP2_METHOD_GET: string;
+        const HTTP2_METHOD_HEAD: string;
+        const HTTP2_METHOD_LABEL: string;
+        const HTTP2_METHOD_LINK: string;
+        const HTTP2_METHOD_LOCK: string;
+        const HTTP2_METHOD_MERGE: string;
+        const HTTP2_METHOD_MKACTIVITY: string;
+        const HTTP2_METHOD_MKCALENDAR: string;
+        const HTTP2_METHOD_MKCOL: string;
+        const HTTP2_METHOD_MKREDIRECTREF: string;
+        const HTTP2_METHOD_MKWORKSPACE: string;
+        const HTTP2_METHOD_MOVE: string;
+        const HTTP2_METHOD_OPTIONS: string;
+        const HTTP2_METHOD_ORDERPATCH: string;
+        const HTTP2_METHOD_PATCH: string;
+        const HTTP2_METHOD_POST: string;
+        const HTTP2_METHOD_PRI: string;
+        const HTTP2_METHOD_PROPFIND: string;
+        const HTTP2_METHOD_PROPPATCH: string;
+        const HTTP2_METHOD_PUT: string;
+        const HTTP2_METHOD_REBIND: string;
+        const HTTP2_METHOD_REPORT: string;
+        const HTTP2_METHOD_SEARCH: string;
+        const HTTP2_METHOD_TRACE: string;
+        const HTTP2_METHOD_UNBIND: string;
+        const HTTP2_METHOD_UNCHECKOUT: string;
+        const HTTP2_METHOD_UNLINK: string;
+        const HTTP2_METHOD_UNLOCK: string;
+        const HTTP2_METHOD_UPDATE: string;
+        const HTTP2_METHOD_UPDATEREDIRECTREF: string;
+        const HTTP2_METHOD_VERSION_CONTROL: string;
+        const HTTP_STATUS_CONTINUE: number;
+        const HTTP_STATUS_SWITCHING_PROTOCOLS: number;
+        const HTTP_STATUS_PROCESSING: number;
+        const HTTP_STATUS_OK: number;
+        const HTTP_STATUS_CREATED: number;
+        const HTTP_STATUS_ACCEPTED: number;
+        const HTTP_STATUS_NON_AUTHORITATIVE_INFORMATION: number;
+        const HTTP_STATUS_NO_CONTENT: number;
+        const HTTP_STATUS_RESET_CONTENT: number;
+        const HTTP_STATUS_PARTIAL_CONTENT: number;
+        const HTTP_STATUS_MULTI_STATUS: number;
+        const HTTP_STATUS_ALREADY_REPORTED: number;
+        const HTTP_STATUS_IM_USED: number;
+        const HTTP_STATUS_MULTIPLE_CHOICES: number;
+        const HTTP_STATUS_MOVED_PERMANENTLY: number;
+        const HTTP_STATUS_FOUND: number;
+        const HTTP_STATUS_SEE_OTHER: number;
+        const HTTP_STATUS_NOT_MODIFIED: number;
+        const HTTP_STATUS_USE_PROXY: number;
+        const HTTP_STATUS_TEMPORARY_REDIRECT: number;
+        const HTTP_STATUS_PERMANENT_REDIRECT: number;
+        const HTTP_STATUS_BAD_REQUEST: number;
+        const HTTP_STATUS_UNAUTHORIZED: number;
+        const HTTP_STATUS_PAYMENT_REQUIRED: number;
+        const HTTP_STATUS_FORBIDDEN: number;
+        const HTTP_STATUS_NOT_FOUND: number;
+        const HTTP_STATUS_METHOD_NOT_ALLOWED: number;
+        const HTTP_STATUS_NOT_ACCEPTABLE: number;
+        const HTTP_STATUS_PROXY_AUTHENTICATION_REQUIRED: number;
+        const HTTP_STATUS_REQUEST_TIMEOUT: number;
+        const HTTP_STATUS_CONFLICT: number;
+        const HTTP_STATUS_GONE: number;
+        const HTTP_STATUS_LENGTH_REQUIRED: number;
+        const HTTP_STATUS_PRECONDITION_FAILED: number;
+        const HTTP_STATUS_PAYLOAD_TOO_LARGE: number;
+        const HTTP_STATUS_URI_TOO_LONG: number;
+        const HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE: number;
+        const HTTP_STATUS_RANGE_NOT_SATISFIABLE: number;
+        const HTTP_STATUS_EXPECTATION_FAILED: number;
+        const HTTP_STATUS_TEAPOT: number;
+        const HTTP_STATUS_MISDIRECTED_REQUEST: number;
+        const HTTP_STATUS_UNPROCESSABLE_ENTITY: number;
+        const HTTP_STATUS_LOCKED: number;
+        const HTTP_STATUS_FAILED_DEPENDENCY: number;
+        const HTTP_STATUS_UNORDERED_COLLECTION: number;
+        const HTTP_STATUS_UPGRADE_REQUIRED: number;
+        const HTTP_STATUS_PRECONDITION_REQUIRED: number;
+        const HTTP_STATUS_TOO_MANY_REQUESTS: number;
+        const HTTP_STATUS_REQUEST_HEADER_FIELDS_TOO_LARGE: number;
+        const HTTP_STATUS_UNAVAILABLE_FOR_LEGAL_REASONS: number;
+        const HTTP_STATUS_INTERNAL_SERVER_ERROR: number;
+        const HTTP_STATUS_NOT_IMPLEMENTED: number;
+        const HTTP_STATUS_BAD_GATEWAY: number;
+        const HTTP_STATUS_SERVICE_UNAVAILABLE: number;
+        const HTTP_STATUS_GATEWAY_TIMEOUT: number;
+        const HTTP_STATUS_HTTP_VERSION_NOT_SUPPORTED: number;
+        const HTTP_STATUS_VARIANT_ALSO_NEGOTIATES: number;
+        const HTTP_STATUS_INSUFFICIENT_STORAGE: number;
+        const HTTP_STATUS_LOOP_DETECTED: number;
+        const HTTP_STATUS_BANDWIDTH_LIMIT_EXCEEDED: number;
+        const HTTP_STATUS_NOT_EXTENDED: number;
+        const HTTP_STATUS_NETWORK_AUTHENTICATION_REQUIRED: number;
+    }
+    /**
+     * This symbol can be set as a property on the HTTP/2 headers object with
+     * an array value in order to provide a list of headers considered sensitive.
+     */
+    const sensitiveHeaders: symbol;
+    /**
+     * Returns an object containing the default settings for an `Http2Session` instance. This method returns a new object instance every time it is called
+     * so instances returned may be safely modified for use.
+     * @since v8.4.0
+     */
+    function getDefaultSettings(): Settings;
+    /**
+     * Returns a `Buffer` instance containing serialized representation of the given
+     * HTTP/2 settings as specified in the [HTTP/2](https://tools.ietf.org/html/rfc7540) specification. This is intended
+     * for use with the `HTTP2-Settings` header field.
+     *
+     * ```js
+     * import http2 from 'node:http2';
+     *
+     * const packed = http2.getPackedSettings({ enablePush: false });
+     *
+     * console.log(packed.toString('base64'));
+     * // Prints: AAIAAAAA
+     * ```
+     * @since v8.4.0
+     */
+    function getPackedSettings(settings: Settings): NonSharedBuffer;
+    /**
+     * Returns a `HTTP/2 Settings Object` containing the deserialized settings from
+     * the given `Buffer` as generated by `http2.getPackedSettings()`.
+     * @since v8.4.0
+     * @param buf The packed settings.
+     */
+    function getUnpackedSettings(buf: Uint8Array): Settings;
+    /**
+     * Returns a `net.Server` instance that creates and manages `Http2Session` instances.
+     *
+     * Since there are no browsers known that support [unencrypted HTTP/2](https://http2.github.io/faq/#does-http2-require-encryption), the use of {@link createSecureServer} is necessary when
+     * communicating
+     * with browser clients.
+     *
+     * ```js
+     * import http2 from 'node:http2';
+     *
+     * // Create an unencrypted HTTP/2 server.
+     * // Since there are no browsers known that support
+     * // unencrypted HTTP/2, the use of `http2.createSecureServer()`
+     * // is necessary when communicating with browser clients.
+     * const server = http2.createServer();
+     *
+     * server.on('stream', (stream, headers) => {
+     *   stream.respond({
+     *     'content-type': 'text/html; charset=utf-8',
+     *     ':status': 200,
+     *   });
+     *   stream.end('<h1>Hello World</h1>');
+     * });
+     *
+     * server.listen(8000);
+     * ```
+     * @since v8.4.0
+     * @param onRequestHandler See `Compatibility API`
+     */
+    function createServer(
+        onRequestHandler?: (request: Http2ServerRequest, response: Http2ServerResponse) => void,
+    ): Http2Server;
+    function createServer<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    >(
+        options: ServerOptions<Http1Request, Http1Response, Http2Request, Http2Response>,
+        onRequestHandler?: (request: InstanceType<Http2Request>, response: InstanceType<Http2Response>) => void,
+    ): Http2Server<Http1Request, Http1Response, Http2Request, Http2Response>;
+    /**
+     * Returns a `tls.Server` instance that creates and manages `Http2Session` instances.
+     *
+     * ```js
+     * import http2 from 'node:http2';
+     * import fs from 'node:fs';
+     *
+     * const options = {
+     *   key: fs.readFileSync('server-key.pem'),
+     *   cert: fs.readFileSync('server-cert.pem'),
+     * };
+     *
+     * // Create a secure HTTP/2 server
+     * const server = http2.createSecureServer(options);
+     *
+     * server.on('stream', (stream, headers) => {
+     *   stream.respond({
+     *     'content-type': 'text/html; charset=utf-8',
+     *     ':status': 200,
+     *   });
+     *   stream.end('<h1>Hello World</h1>');
+     * });
+     *
+     * server.listen(8443);
+     * ```
+     * @since v8.4.0
+     * @param onRequestHandler See `Compatibility API`
+     */
+    function createSecureServer(
+        onRequestHandler?: (request: Http2ServerRequest, response: Http2ServerResponse) => void,
+    ): Http2SecureServer;
+    function createSecureServer<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    >(
+        options: SecureServerOptions<Http1Request, Http1Response, Http2Request, Http2Response>,
+        onRequestHandler?: (request: InstanceType<Http2Request>, response: InstanceType<Http2Response>) => void,
+    ): Http2SecureServer<Http1Request, Http1Response, Http2Request, Http2Response>;
+    /**
+     * Returns a `ClientHttp2Session` instance.
+     *
+     * ```js
+     * import http2 from 'node:http2';
+     * const client = http2.connect('https://localhost:1234');
+     *
+     * // Use the client
+     *
+     * client.close();
+     * ```
+     * @since v8.4.0
+     * @param authority The remote HTTP/2 server to connect to. This must be in the form of a minimal, valid URL with the `http://` or `https://` prefix, host name, and IP port (if a non-default port
+     * is used). Userinfo (user ID and password), path, querystring, and fragment details in the URL will be ignored.
+     * @param listener Will be registered as a one-time listener of the {@link 'connect'} event.
+     */
+    function connect(
+        authority: string | url.URL,
+        listener: (session: ClientHttp2Session, socket: net.Socket | tls.TLSSocket) => void,
+    ): ClientHttp2Session;
+    function connect(
+        authority: string | url.URL,
+        options?: ClientSessionOptions | SecureClientSessionOptions,
+        listener?: (session: ClientHttp2Session, socket: net.Socket | tls.TLSSocket) => void,
+    ): ClientHttp2Session;
+    /**
+     * Create an HTTP/2 server session from an existing socket.
+     * @param socket A Duplex Stream
+     * @param options Any `{@link createServer}` options can be provided.
+     * @since v20.12.0
+     */
+    function performServerHandshake<
+        Http1Request extends typeof IncomingMessage = typeof IncomingMessage,
+        Http1Response extends typeof ServerResponse<InstanceType<Http1Request>> = typeof ServerResponse,
+        Http2Request extends typeof Http2ServerRequest = typeof Http2ServerRequest,
+        Http2Response extends typeof Http2ServerResponse<InstanceType<Http2Request>> = typeof Http2ServerResponse,
+    >(
+        socket: stream.Duplex,
+        options?: ServerOptions<Http1Request, Http1Response, Http2Request, Http2Response>,
+    ): ServerHttp2Session<Http1Request, Http1Response, Http2Request, Http2Response>;
+}
+declare module "node:http2" {
+    export { OutgoingHttpHeaders } from "node:http";
+}
+declare module "http2" {
+    export * from "node:http2";
+}
diff --git a/mqtt-backend/node_modules/@types/node/https.d.ts b/mqtt-backend/node_modules/@types/node/https.d.ts
new file mode 100644
index 0000000..b10aad0
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/https.d.ts
@@ -0,0 +1,400 @@
+declare module "node:https" {
+    import * as http from "node:http";
+    import { Duplex } from "node:stream";
+    import * as tls from "node:tls";
+    import { URL } from "node:url";
+    interface ServerOptions<
+        Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
+        Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
+    > extends http.ServerOptions<Request, Response>, tls.TlsOptions {}
+    interface RequestOptions extends http.RequestOptions, tls.SecureContextOptions {
+        checkServerIdentity?:
+            | ((hostname: string, cert: tls.DetailedPeerCertificate) => Error | undefined)
+            | undefined;
+        rejectUnauthorized?: boolean | undefined; // Defaults to true
+        servername?: string | undefined; // SNI TLS Extension
+    }
+    interface AgentOptions extends http.AgentOptions, tls.ConnectionOptions {
+        maxCachedSessions?: number | undefined;
+    }
+    /**
+     * An `Agent` object for HTTPS similar to `http.Agent`. See {@link request} for more information.
+     *
+     * Like `http.Agent`, the `createConnection(options[, callback])` method can be overridden
+     * to customize how TLS connections are established.
+     *
+     * > See `agent.createConnection()` for details on overriding this method,
+     * > including asynchronous socket creation with a callback.
+     * @since v0.4.5
+     */
+    class Agent extends http.Agent {
+        constructor(options?: AgentOptions);
+        options: AgentOptions;
+        createConnection(
+            options: RequestOptions,
+            callback?: (err: Error | null, stream: Duplex) => void,
+        ): Duplex | null | undefined;
+        getName(options?: RequestOptions): string;
+    }
+    interface ServerEventMap<
+        Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
+        Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
+    > extends http.ServerEventMap<Request, Response>, tls.ServerEventMap {}
+    /**
+     * See `http.Server` for more information.
+     * @since v0.3.4
+     */
+    class Server<
+        Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
+        Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
+    > extends tls.Server {
+        constructor(requestListener?: http.RequestListener<Request, Response>);
+        constructor(
+            options: ServerOptions<Request, Response>,
+            requestListener?: http.RequestListener<Request, Response>,
+        );
+        /**
+         * Closes all connections connected to this server.
+         * @since v18.2.0
+         */
+        closeAllConnections(): void;
+        /**
+         * Closes all connections connected to this server which are not sending a request or waiting for a response.
+         * @since v18.2.0
+         */
+        closeIdleConnections(): void;
+        // #region InternalEventEmitter
+        addListener<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof ServerEventMap>(eventName: E, ...args: ServerEventMap<Request, Response>[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener?: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof ServerEventMap>(
+            eventName: E,
+        ): ((...args: ServerEventMap<Request, Response>[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof ServerEventMap>(
+            eventName: E,
+        ): ((...args: ServerEventMap<Request, Response>[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof ServerEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap<Request, Response>[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface Server<
+        Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
+        Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
+    > extends http.Server<Request, Response> {}
+    /**
+     * ```js
+     * // curl -k https://localhost:8000/
+     * import https from 'node:https';
+     * import fs from 'node:fs';
+     *
+     * const options = {
+     *   key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
+     *   cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem'),
+     * };
+     *
+     * https.createServer(options, (req, res) => {
+     *   res.writeHead(200);
+     *   res.end('hello world\n');
+     * }).listen(8000);
+     * ```
+     *
+     * Or
+     *
+     * ```js
+     * import https from 'node:https';
+     * import fs from 'node:fs';
+     *
+     * const options = {
+     *   pfx: fs.readFileSync('test/fixtures/test_cert.pfx'),
+     *   passphrase: 'sample',
+     * };
+     *
+     * https.createServer(options, (req, res) => {
+     *   res.writeHead(200);
+     *   res.end('hello world\n');
+     * }).listen(8000);
+     * ```
+     * @since v0.3.4
+     * @param options Accepts `options` from `createServer`, `createSecureContext` and `createServer`.
+     * @param requestListener A listener to be added to the `'request'` event.
+     */
+    function createServer<
+        Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
+        Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
+    >(requestListener?: http.RequestListener<Request, Response>): Server<Request, Response>;
+    function createServer<
+        Request extends typeof http.IncomingMessage = typeof http.IncomingMessage,
+        Response extends typeof http.ServerResponse<InstanceType<Request>> = typeof http.ServerResponse,
+    >(
+        options: ServerOptions<Request, Response>,
+        requestListener?: http.RequestListener<Request, Response>,
+    ): Server<Request, Response>;
+    /**
+     * Makes a request to a secure web server.
+     *
+     * The following additional `options` from `tls.connect()` are also accepted: `ca`, `cert`, `ciphers`, `clientCertEngine`, `crl`, `dhparam`, `ecdhCurve`, `honorCipherOrder`, `key`, `passphrase`,
+     * `pfx`, `rejectUnauthorized`, `secureOptions`, `secureProtocol`, `servername`, `sessionIdContext`, `highWaterMark`.
+     *
+     * `options` can be an object, a string, or a `URL` object. If `options` is a
+     * string, it is automatically parsed with `new URL()`. If it is a `URL` object, it will be automatically converted to an ordinary `options` object.
+     *
+     * `https.request()` returns an instance of the `http.ClientRequest` class. The `ClientRequest` instance is a writable stream. If one needs to
+     * upload a file with a POST request, then write to the `ClientRequest` object.
+     *
+     * ```js
+     * import https from 'node:https';
+     *
+     * const options = {
+     *   hostname: 'encrypted.google.com',
+     *   port: 443,
+     *   path: '/',
+     *   method: 'GET',
+     * };
+     *
+     * const req = https.request(options, (res) => {
+     *   console.log('statusCode:', res.statusCode);
+     *   console.log('headers:', res.headers);
+     *
+     *   res.on('data', (d) => {
+     *     process.stdout.write(d);
+     *   });
+     * });
+     *
+     * req.on('error', (e) => {
+     *   console.error(e);
+     * });
+     * req.end();
+     * ```
+     *
+     * Example using options from `tls.connect()`:
+     *
+     * ```js
+     * const options = {
+     *   hostname: 'encrypted.google.com',
+     *   port: 443,
+     *   path: '/',
+     *   method: 'GET',
+     *   key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
+     *   cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem'),
+     * };
+     * options.agent = new https.Agent(options);
+     *
+     * const req = https.request(options, (res) => {
+     *   // ...
+     * });
+     * ```
+     *
+     * Alternatively, opt out of connection pooling by not using an `Agent`.
+     *
+     * ```js
+     * const options = {
+     *   hostname: 'encrypted.google.com',
+     *   port: 443,
+     *   path: '/',
+     *   method: 'GET',
+     *   key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
+     *   cert: fs.readFileSync('test/fixtures/keys/agent2-cert.pem'),
+     *   agent: false,
+     * };
+     *
+     * const req = https.request(options, (res) => {
+     *   // ...
+     * });
+     * ```
+     *
+     * Example using a `URL` as `options`:
+     *
+     * ```js
+     * const options = new URL('https://abc:xyz@example.com');
+     *
+     * const req = https.request(options, (res) => {
+     *   // ...
+     * });
+     * ```
+     *
+     * Example pinning on certificate fingerprint, or the public key (similar to`pin-sha256`):
+     *
+     * ```js
+     * import tls from 'node:tls';
+     * import https from 'node:https';
+     * import crypto from 'node:crypto';
+     *
+     * function sha256(s) {
+     *   return crypto.createHash('sha256').update(s).digest('base64');
+     * }
+     * const options = {
+     *   hostname: 'github.com',
+     *   port: 443,
+     *   path: '/',
+     *   method: 'GET',
+     *   checkServerIdentity: function(host, cert) {
+     *     // Make sure the certificate is issued to the host we are connected to
+     *     const err = tls.checkServerIdentity(host, cert);
+     *     if (err) {
+     *       return err;
+     *     }
+     *
+     *     // Pin the public key, similar to HPKP pin-sha256 pinning
+     *     const pubkey256 = 'pL1+qb9HTMRZJmuC/bB/ZI9d302BYrrqiVuRyW+DGrU=';
+     *     if (sha256(cert.pubkey) !== pubkey256) {
+     *       const msg = 'Certificate verification error: ' +
+     *         `The public key of '${cert.subject.CN}' ` +
+     *         'does not match our pinned fingerprint';
+     *       return new Error(msg);
+     *     }
+     *
+     *     // Pin the exact certificate, rather than the pub key
+     *     const cert256 = '25:FE:39:32:D9:63:8C:8A:FC:A1:9A:29:87:' +
+     *       'D8:3E:4C:1D:98:DB:71:E4:1A:48:03:98:EA:22:6A:BD:8B:93:16';
+     *     if (cert.fingerprint256 !== cert256) {
+     *       const msg = 'Certificate verification error: ' +
+     *         `The certificate of '${cert.subject.CN}' ` +
+     *         'does not match our pinned fingerprint';
+     *       return new Error(msg);
+     *     }
+     *
+     *     // This loop is informational only.
+     *     // Print the certificate and public key fingerprints of all certs in the
+     *     // chain. Its common to pin the public key of the issuer on the public
+     *     // internet, while pinning the public key of the service in sensitive
+     *     // environments.
+     *     do {
+     *       console.log('Subject Common Name:', cert.subject.CN);
+     *       console.log('  Certificate SHA256 fingerprint:', cert.fingerprint256);
+     *
+     *       hash = crypto.createHash('sha256');
+     *       console.log('  Public key ping-sha256:', sha256(cert.pubkey));
+     *
+     *       lastprint256 = cert.fingerprint256;
+     *       cert = cert.issuerCertificate;
+     *     } while (cert.fingerprint256 !== lastprint256);
+     *
+     *   },
+     * };
+     *
+     * options.agent = new https.Agent(options);
+     * const req = https.request(options, (res) => {
+     *   console.log('All OK. Server matched our pinned cert or public key');
+     *   console.log('statusCode:', res.statusCode);
+     *   // Print the HPKP values
+     *   console.log('headers:', res.headers['public-key-pins']);
+     *
+     *   res.on('data', (d) => {});
+     * });
+     *
+     * req.on('error', (e) => {
+     *   console.error(e.message);
+     * });
+     * req.end();
+     * ```
+     *
+     * Outputs for example:
+     *
+     * ```text
+     * Subject Common Name: github.com
+     *   Certificate SHA256 fingerprint: 25:FE:39:32:D9:63:8C:8A:FC:A1:9A:29:87:D8:3E:4C:1D:98:DB:71:E4:1A:48:03:98:EA:22:6A:BD:8B:93:16
+     *   Public key ping-sha256: pL1+qb9HTMRZJmuC/bB/ZI9d302BYrrqiVuRyW+DGrU=
+     * Subject Common Name: DigiCert SHA2 Extended Validation Server CA
+     *   Certificate SHA256 fingerprint: 40:3E:06:2A:26:53:05:91:13:28:5B:AF:80:A0:D4:AE:42:2C:84:8C:9F:78:FA:D0:1F:C9:4B:C5:B8:7F:EF:1A
+     *   Public key ping-sha256: RRM1dGqnDFsCJXBTHky16vi1obOlCgFFn/yOhI/y+ho=
+     * Subject Common Name: DigiCert High Assurance EV Root CA
+     *   Certificate SHA256 fingerprint: 74:31:E5:F4:C3:C1:CE:46:90:77:4F:0B:61:E0:54:40:88:3B:A9:A0:1E:D0:0B:A6:AB:D7:80:6E:D3:B1:18:CF
+     *   Public key ping-sha256: WoiWRyIOVNa9ihaBciRSC7XHjliYS9VwUGOIud4PB18=
+     * All OK. Server matched our pinned cert or public key
+     * statusCode: 200
+     * headers: max-age=0; pin-sha256="WoiWRyIOVNa9ihaBciRSC7XHjliYS9VwUGOIud4PB18="; pin-sha256="RRM1dGqnDFsCJXBTHky16vi1obOlCgFFn/yOhI/y+ho=";
+     * pin-sha256="k2v657xBsOVe1PQRwOsHsw3bsGT2VzIqz5K+59sNQws="; pin-sha256="K87oWBWM9UZfyddvDfoxL+8lpNyoUB2ptGtn0fv6G2Q="; pin-sha256="IQBnNBEiFuhj+8x6X8XLgh01V9Ic5/V3IRQLNFFc7v4=";
+     * pin-sha256="iie1VXtL7HzAMF+/PVPR9xzT80kQxdZeJ+zduCB3uj0="; pin-sha256="LvRiGEjRqfzurezaWuj8Wie2gyHMrW5Q06LspMnox7A="; includeSubDomains
+     * ```
+     * @since v0.3.6
+     * @param options Accepts all `options` from `request`, with some differences in default values:
+     */
+    function request(
+        options: RequestOptions | string | URL,
+        callback?: (res: http.IncomingMessage) => void,
+    ): http.ClientRequest;
+    function request(
+        url: string | URL,
+        options: RequestOptions,
+        callback?: (res: http.IncomingMessage) => void,
+    ): http.ClientRequest;
+    /**
+     * Like `http.get()` but for HTTPS.
+     *
+     * `options` can be an object, a string, or a `URL` object. If `options` is a
+     * string, it is automatically parsed with `new URL()`. If it is a `URL` object, it will be automatically converted to an ordinary `options` object.
+     *
+     * ```js
+     * import https from 'node:https';
+     *
+     * https.get('https://encrypted.google.com/', (res) => {
+     *   console.log('statusCode:', res.statusCode);
+     *   console.log('headers:', res.headers);
+     *
+     *   res.on('data', (d) => {
+     *     process.stdout.write(d);
+     *   });
+     *
+     * }).on('error', (e) => {
+     *   console.error(e);
+     * });
+     * ```
+     * @since v0.3.6
+     * @param options Accepts the same `options` as {@link request}, with the `method` always set to `GET`.
+     */
+    function get(
+        options: RequestOptions | string | URL,
+        callback?: (res: http.IncomingMessage) => void,
+    ): http.ClientRequest;
+    function get(
+        url: string | URL,
+        options: RequestOptions,
+        callback?: (res: http.IncomingMessage) => void,
+    ): http.ClientRequest;
+    let globalAgent: Agent;
+}
+declare module "https" {
+    export * from "node:https";
+}
diff --git a/mqtt-backend/node_modules/@types/node/index.d.ts b/mqtt-backend/node_modules/@types/node/index.d.ts
new file mode 100644
index 0000000..08ab4f0
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/index.d.ts
@@ -0,0 +1,115 @@
+/**
+ * License for programmatically and manually incorporated
+ * documentation aka. `JSDoc` from https://github.com/nodejs/node/tree/master/doc
+ *
+ * Copyright Node.js contributors. All rights reserved.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+// NOTE: These definitions support Node.js and TypeScript 5.8+.
+
+// Reference required TypeScript libraries:
+/// <reference lib="es2020" />
+/// <reference lib="esnext.disposable" />
+/// <reference lib="esnext.float16" />
+
+// Iterator definitions required for compatibility with TypeScript <5.6:
+/// <reference path="compatibility/iterators.d.ts" />
+
+// Definitions for Node.js modules specific to TypeScript 5.7+:
+/// <reference path="globals.typedarray.d.ts" />
+/// <reference path="buffer.buffer.d.ts" />
+
+// Definitions for Node.js modules that are not specific to any version of TypeScript:
+/// <reference path="globals.d.ts" />
+/// <reference path="web-globals/abortcontroller.d.ts" />
+/// <reference path="web-globals/blob.d.ts" />
+/// <reference path="web-globals/console.d.ts" />
+/// <reference path="web-globals/crypto.d.ts" />
+/// <reference path="web-globals/domexception.d.ts" />
+/// <reference path="web-globals/encoding.d.ts" />
+/// <reference path="web-globals/events.d.ts" />
+/// <reference path="web-globals/fetch.d.ts" />
+/// <reference path="web-globals/importmeta.d.ts" />
+/// <reference path="web-globals/messaging.d.ts" />
+/// <reference path="web-globals/navigator.d.ts" />
+/// <reference path="web-globals/performance.d.ts" />
+/// <reference path="web-globals/storage.d.ts" />
+/// <reference path="web-globals/streams.d.ts" />
+/// <reference path="web-globals/timers.d.ts" />
+/// <reference path="web-globals/url.d.ts" />
+/// <reference path="assert.d.ts" />
+/// <reference path="assert/strict.d.ts" />
+/// <reference path="async_hooks.d.ts" />
+/// <reference path="buffer.d.ts" />
+/// <reference path="child_process.d.ts" />
+/// <reference path="cluster.d.ts" />
+/// <reference path="console.d.ts" />
+/// <reference path="constants.d.ts" />
+/// <reference path="crypto.d.ts" />
+/// <reference path="dgram.d.ts" />
+/// <reference path="diagnostics_channel.d.ts" />
+/// <reference path="dns.d.ts" />
+/// <reference path="dns/promises.d.ts" />
+/// <reference path="domain.d.ts" />
+/// <reference path="events.d.ts" />
+/// <reference path="fs.d.ts" />
+/// <reference path="fs/promises.d.ts" />
+/// <reference path="http.d.ts" />
+/// <reference path="http2.d.ts" />
+/// <reference path="https.d.ts" />
+/// <reference path="inspector.d.ts" />
+/// <reference path="inspector.generated.d.ts" />
+/// <reference path="inspector/promises.d.ts" />
+/// <reference path="module.d.ts" />
+/// <reference path="net.d.ts" />
+/// <reference path="os.d.ts" />
+/// <reference path="path.d.ts" />
+/// <reference path="path/posix.d.ts" />
+/// <reference path="path/win32.d.ts" />
+/// <reference path="perf_hooks.d.ts" />
+/// <reference path="process.d.ts" />
+/// <reference path="punycode.d.ts" />
+/// <reference path="querystring.d.ts" />
+/// <reference path="quic.d.ts" />
+/// <reference path="readline.d.ts" />
+/// <reference path="readline/promises.d.ts" />
+/// <reference path="repl.d.ts" />
+/// <reference path="sea.d.ts" />
+/// <reference path="sqlite.d.ts" />
+/// <reference path="stream.d.ts" />
+/// <reference path="stream/consumers.d.ts" />
+/// <reference path="stream/promises.d.ts" />
+/// <reference path="stream/web.d.ts" />
+/// <reference path="string_decoder.d.ts" />
+/// <reference path="test.d.ts" />
+/// <reference path="test/reporters.d.ts" />
+/// <reference path="timers.d.ts" />
+/// <reference path="timers/promises.d.ts" />
+/// <reference path="tls.d.ts" />
+/// <reference path="trace_events.d.ts" />
+/// <reference path="tty.d.ts" />
+/// <reference path="url.d.ts" />
+/// <reference path="util.d.ts" />
+/// <reference path="util/types.d.ts" />
+/// <reference path="v8.d.ts" />
+/// <reference path="vm.d.ts" />
+/// <reference path="wasi.d.ts" />
+/// <reference path="worker_threads.d.ts" />
+/// <reference path="zlib.d.ts" />
diff --git a/mqtt-backend/node_modules/@types/node/inspector.d.ts b/mqtt-backend/node_modules/@types/node/inspector.d.ts
new file mode 100644
index 0000000..cf385b7
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/inspector.d.ts
@@ -0,0 +1,264 @@
+declare module "node:inspector" {
+    import { EventEmitter } from "node:events";
+    /**
+     * The `inspector.Session` is used for dispatching messages to the V8 inspector
+     * back-end and receiving message responses and notifications.
+     */
+    class Session extends EventEmitter {
+        /**
+         * Create a new instance of the inspector.Session class.
+         * The inspector session needs to be connected through `session.connect()` before the messages can be dispatched to the inspector backend.
+         */
+        constructor();
+        /**
+         * Connects a session to the inspector back-end.
+         */
+        connect(): void;
+        /**
+         * Connects a session to the inspector back-end.
+         * An exception will be thrown if this API was not called on a Worker thread.
+         * @since v12.11.0
+         */
+        connectToMainThread(): void;
+        /**
+         * Immediately close the session. All pending message callbacks will be called with an error.
+         * `session.connect()` will need to be called to be able to send messages again.
+         * Reconnected session will lose all inspector state, such as enabled agents or configured breakpoints.
+         */
+        disconnect(): void;
+    }
+    /**
+     * Activate inspector on host and port. Equivalent to `node --inspect=[[host:]port]`, but can be done programmatically after node has
+     * started.
+     *
+     * If wait is `true`, will block until a client has connected to the inspect port
+     * and flow control has been passed to the debugger client.
+     *
+     * See the [security warning](https://nodejs.org/docs/latest-v25.x/api/cli.html#warning-binding-inspector-to-a-public-ipport-combination-is-insecure)
+     * regarding the `host` parameter usage.
+     * @param port Port to listen on for inspector connections. Defaults to what was specified on the CLI.
+     * @param host Host to listen on for inspector connections. Defaults to what was specified on the CLI.
+     * @param wait Block until a client has connected. Defaults to what was specified on the CLI.
+     * @returns Disposable that calls `inspector.close()`.
+     */
+    function open(port?: number, host?: string, wait?: boolean): Disposable;
+    /**
+     * Deactivate the inspector. Blocks until there are no active connections.
+     */
+    function close(): void;
+    /**
+     * Return the URL of the active inspector, or `undefined` if there is none.
+     *
+     * ```console
+     * $ node --inspect -p 'inspector.url()'
+     * Debugger listening on ws://127.0.0.1:9229/166e272e-7a30-4d09-97ce-f1c012b43c34
+     * For help, see: https://nodejs.org/en/docs/inspector
+     * ws://127.0.0.1:9229/166e272e-7a30-4d09-97ce-f1c012b43c34
+     *
+     * $ node --inspect=localhost:3000 -p 'inspector.url()'
+     * Debugger listening on ws://localhost:3000/51cf8d0e-3c36-4c59-8efd-54519839e56a
+     * For help, see: https://nodejs.org/en/docs/inspector
+     * ws://localhost:3000/51cf8d0e-3c36-4c59-8efd-54519839e56a
+     *
+     * $ node -p 'inspector.url()'
+     * undefined
+     * ```
+     */
+    function url(): string | undefined;
+    /**
+     * Blocks until a client (existing or connected later) has sent `Runtime.runIfWaitingForDebugger` command.
+     *
+     * An exception will be thrown if there is no active inspector.
+     * @since v12.7.0
+     */
+    function waitForDebugger(): void;
+    // These methods are exposed by the V8 inspector console API (inspector/v8-console.h).
+    // The method signatures differ from those of the Node.js console, and are deliberately
+    // typed permissively.
+    interface InspectorConsole {
+        debug(...data: any[]): void;
+        error(...data: any[]): void;
+        info(...data: any[]): void;
+        log(...data: any[]): void;
+        warn(...data: any[]): void;
+        dir(...data: any[]): void;
+        dirxml(...data: any[]): void;
+        table(...data: any[]): void;
+        trace(...data: any[]): void;
+        group(...data: any[]): void;
+        groupCollapsed(...data: any[]): void;
+        groupEnd(...data: any[]): void;
+        clear(...data: any[]): void;
+        count(label?: any): void;
+        countReset(label?: any): void;
+        assert(value?: any, ...data: any[]): void;
+        profile(label?: any): void;
+        profileEnd(label?: any): void;
+        time(label?: any): void;
+        timeLog(label?: any): void;
+        timeStamp(label?: any): void;
+    }
+    /**
+     * An object to send messages to the remote inspector console.
+     * @since v11.0.0
+     */
+    const console: InspectorConsole;
+    // DevTools protocol event broadcast methods
+    namespace Network {
+        /**
+         * This feature is only available with the `--experimental-network-inspection` flag enabled.
+         *
+         * Broadcasts the `Network.requestWillBeSent` event to connected frontends. This event indicates that
+         * the application is about to send an HTTP request.
+         * @since v22.6.0
+         */
+        function requestWillBeSent(params: RequestWillBeSentEventDataType): void;
+        /**
+         * This feature is only available with the `--experimental-network-inspection` flag enabled.
+         *
+         * Broadcasts the `Network.dataReceived` event to connected frontends, or buffers the data if
+         * `Network.streamResourceContent` command was not invoked for the given request yet.
+         *
+         * Also enables `Network.getResponseBody` command to retrieve the response data.
+         * @since v24.2.0
+         */
+        function dataReceived(params: DataReceivedEventDataType): void;
+        /**
+         * This feature is only available with the `--experimental-network-inspection` flag enabled.
+         *
+         * Enables `Network.getRequestPostData` command to retrieve the request data.
+         * @since v24.3.0
+         */
+        function dataSent(params: unknown): void;
+        /**
+         * This feature is only available with the `--experimental-network-inspection` flag enabled.
+         *
+         * Broadcasts the `Network.responseReceived` event to connected frontends. This event indicates that
+         * HTTP response is available.
+         * @since v22.6.0
+         */
+        function responseReceived(params: ResponseReceivedEventDataType): void;
+        /**
+         * This feature is only available with the `--experimental-network-inspection` flag enabled.
+         *
+         * Broadcasts the `Network.loadingFinished` event to connected frontends. This event indicates that
+         * HTTP request has finished loading.
+         * @since v22.6.0
+         */
+        function loadingFinished(params: LoadingFinishedEventDataType): void;
+        /**
+         * This feature is only available with the `--experimental-network-inspection` flag enabled.
+         *
+         * Broadcasts the `Network.loadingFailed` event to connected frontends. This event indicates that
+         * HTTP request has failed to load.
+         * @since v22.7.0
+         */
+        function loadingFailed(params: LoadingFailedEventDataType): void;
+        /**
+         * This feature is only available with the `--experimental-network-inspection` flag enabled.
+         *
+         * Broadcasts the `Network.webSocketCreated` event to connected frontends. This event indicates that
+         * a WebSocket connection has been initiated.
+         * @since v24.7.0
+         */
+        function webSocketCreated(params: WebSocketCreatedEventDataType): void;
+        /**
+         * This feature is only available with the `--experimental-network-inspection` flag enabled.
+         *
+         * Broadcasts the `Network.webSocketHandshakeResponseReceived` event to connected frontends.
+         * This event indicates that the WebSocket handshake response has been received.
+         * @since v24.7.0
+         */
+        function webSocketHandshakeResponseReceived(params: WebSocketHandshakeResponseReceivedEventDataType): void;
+        /**
+         * This feature is only available with the `--experimental-network-inspection` flag enabled.
+         *
+         * Broadcasts the `Network.webSocketClosed` event to connected frontends.
+         * This event indicates that a WebSocket connection has been closed.
+         * @since v24.7.0
+         */
+        function webSocketClosed(params: WebSocketClosedEventDataType): void;
+    }
+    namespace NetworkResources {
+        /**
+         * This feature is only available with the `--experimental-inspector-network-resource` flag enabled.
+         *
+         * The inspector.NetworkResources.put method is used to provide a response for a loadNetworkResource
+         * request issued via the Chrome DevTools Protocol (CDP).
+         * This is typically triggered when a source map is specified by URL, and a DevTools frontend—such as
+         * Chrome—requests the resource to retrieve the source map.
+         *
+         * This method allows developers to predefine the resource content to be served in response to such CDP requests.
+         *
+         * ```js
+         * const inspector = require('node:inspector');
+         * // By preemptively calling put to register the resource, a source map can be resolved when
+         * // a loadNetworkResource request is made from the frontend.
+         * async function setNetworkResources() {
+         *   const mapUrl = 'http://localhost:3000/dist/app.js.map';
+         *   const tsUrl = 'http://localhost:3000/src/app.ts';
+         *   const distAppJsMap = await fetch(mapUrl).then((res) => res.text());
+         *   const srcAppTs = await fetch(tsUrl).then((res) => res.text());
+         *   inspector.NetworkResources.put(mapUrl, distAppJsMap);
+         *   inspector.NetworkResources.put(tsUrl, srcAppTs);
+         * };
+         * setNetworkResources().then(() => {
+         *   require('./dist/app');
+         * });
+         * ```
+         *
+         * For more details, see the official CDP documentation: [Network.loadNetworkResource](https://chromedevtools.github.io/devtools-protocol/tot/Network/#method-loadNetworkResource)
+         * @since v24.5.0
+         * @experimental
+         */
+        function put(url: string, data: string): void;
+    }
+    namespace DOMStorage {
+        /**
+         * This feature is only available with the
+         * `--experimental-storage-inspection` flag enabled.
+         *
+         * Broadcasts the `DOMStorage.domStorageItemAdded` event to connected frontends.
+         * This event indicates that a new item has been added to the storage.
+         * @since v25.5.0
+         */
+        function domStorageItemAdded(params: DomStorageItemAddedEventDataType): void;
+        /**
+         * This feature is only available with the
+         * `--experimental-storage-inspection` flag enabled.
+         *
+         * Broadcasts the `DOMStorage.domStorageItemRemoved` event to connected frontends.
+         * This event indicates that an item has been removed from the storage.
+         * @since v25.5.0
+         */
+        function domStorageItemRemoved(params: DomStorageItemRemovedEventDataType): void;
+        /**
+         * This feature is only available with the
+         * `--experimental-storage-inspection` flag enabled.
+
+         * Broadcasts the `DOMStorage.domStorageItemUpdated` event to connected frontends.
+         * This event indicates that a storage item has been updated.
+         * @since v25.5.0
+         */
+        function domStorageItemUpdated(params: DomStorageItemUpdatedEventDataType): void;
+        /**
+         * This feature is only available with the
+         * `--experimental-storage-inspection` flag enabled.
+         *
+         * Broadcasts the `DOMStorage.domStorageItemsCleared` event to connected
+         * frontends. This event indicates that all items have been cleared from the
+         * storage.
+         * @since v25.5.0
+         */
+        function domStorageItemsCleared(params: DomStorageItemsClearedEventDataType): void;
+        /**
+         * This feature is only available with the
+         * `--experimental-storage-inspection` flag enabled.
+         * @since v25.5.0
+         */
+        function registerStorage(params: unknown): void;
+    }
+}
+declare module "inspector" {
+    export * from "node:inspector";
+}
diff --git a/mqtt-backend/node_modules/@types/node/inspector.generated.d.ts b/mqtt-backend/node_modules/@types/node/inspector.generated.d.ts
new file mode 100644
index 0000000..93ae271
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/inspector.generated.d.ts
@@ -0,0 +1,4401 @@
+// These definitions are automatically generated by the generate-inspector script.
+// Do not edit this file directly.
+// See scripts/generate-inspector/README.md for information on how to update the protocol definitions.
+// Changes to the module itself should be added to the generator template (scripts/generate-inspector/inspector.d.ts.template).
+
+declare module "node:inspector" {
+    interface InspectorNotification<T> {
+        method: string;
+        params: T;
+    }
+    namespace Schema {
+        /**
+         * Description of the protocol domain.
+         */
+        interface Domain {
+            /**
+             * Domain name.
+             */
+            name: string;
+            /**
+             * Domain version.
+             */
+            version: string;
+        }
+        interface GetDomainsReturnType {
+            /**
+             * List of supported domains.
+             */
+            domains: Domain[];
+        }
+    }
+    namespace Runtime {
+        /**
+         * Unique script identifier.
+         */
+        type ScriptId = string;
+        /**
+         * Unique object identifier.
+         */
+        type RemoteObjectId = string;
+        /**
+         * Primitive value which cannot be JSON-stringified.
+         */
+        type UnserializableValue = string;
+        /**
+         * Mirror object referencing original JavaScript object.
+         */
+        interface RemoteObject {
+            /**
+             * Object type.
+             */
+            type: string;
+            /**
+             * Object subtype hint. Specified for <code>object</code> type values only.
+             */
+            subtype?: string | undefined;
+            /**
+             * Object class (constructor) name. Specified for <code>object</code> type values only.
+             */
+            className?: string | undefined;
+            /**
+             * Remote object value in case of primitive values or JSON values (if it was requested).
+             */
+            value?: any;
+            /**
+             * Primitive value which can not be JSON-stringified does not have <code>value</code>, but gets this property.
+             */
+            unserializableValue?: UnserializableValue | undefined;
+            /**
+             * String representation of the object.
+             */
+            description?: string | undefined;
+            /**
+             * Unique object identifier (for non-primitive values).
+             */
+            objectId?: RemoteObjectId | undefined;
+            /**
+             * Preview containing abbreviated property values. Specified for <code>object</code> type values only.
+             * @experimental
+             */
+            preview?: ObjectPreview | undefined;
+            /**
+             * @experimental
+             */
+            customPreview?: CustomPreview | undefined;
+        }
+        /**
+         * @experimental
+         */
+        interface CustomPreview {
+            header: string;
+            hasBody: boolean;
+            formatterObjectId: RemoteObjectId;
+            bindRemoteObjectFunctionId: RemoteObjectId;
+            configObjectId?: RemoteObjectId | undefined;
+        }
+        /**
+         * Object containing abbreviated remote object value.
+         * @experimental
+         */
+        interface ObjectPreview {
+            /**
+             * Object type.
+             */
+            type: string;
+            /**
+             * Object subtype hint. Specified for <code>object</code> type values only.
+             */
+            subtype?: string | undefined;
+            /**
+             * String representation of the object.
+             */
+            description?: string | undefined;
+            /**
+             * True iff some of the properties or entries of the original object did not fit.
+             */
+            overflow: boolean;
+            /**
+             * List of the properties.
+             */
+            properties: PropertyPreview[];
+            /**
+             * List of the entries. Specified for <code>map</code> and <code>set</code> subtype values only.
+             */
+            entries?: EntryPreview[] | undefined;
+        }
+        /**
+         * @experimental
+         */
+        interface PropertyPreview {
+            /**
+             * Property name.
+             */
+            name: string;
+            /**
+             * Object type. Accessor means that the property itself is an accessor property.
+             */
+            type: string;
+            /**
+             * User-friendly property value string.
+             */
+            value?: string | undefined;
+            /**
+             * Nested value preview.
+             */
+            valuePreview?: ObjectPreview | undefined;
+            /**
+             * Object subtype hint. Specified for <code>object</code> type values only.
+             */
+            subtype?: string | undefined;
+        }
+        /**
+         * @experimental
+         */
+        interface EntryPreview {
+            /**
+             * Preview of the key. Specified for map-like collection entries.
+             */
+            key?: ObjectPreview | undefined;
+            /**
+             * Preview of the value.
+             */
+            value: ObjectPreview;
+        }
+        /**
+         * Object property descriptor.
+         */
+        interface PropertyDescriptor {
+            /**
+             * Property name or symbol description.
+             */
+            name: string;
+            /**
+             * The value associated with the property.
+             */
+            value?: RemoteObject | undefined;
+            /**
+             * True if the value associated with the property may be changed (data descriptors only).
+             */
+            writable?: boolean | undefined;
+            /**
+             * A function which serves as a getter for the property, or <code>undefined</code> if there is no getter (accessor descriptors only).
+             */
+            get?: RemoteObject | undefined;
+            /**
+             * A function which serves as a setter for the property, or <code>undefined</code> if there is no setter (accessor descriptors only).
+             */
+            set?: RemoteObject | undefined;
+            /**
+             * True if the type of this property descriptor may be changed and if the property may be deleted from the corresponding object.
+             */
+            configurable: boolean;
+            /**
+             * True if this property shows up during enumeration of the properties on the corresponding object.
+             */
+            enumerable: boolean;
+            /**
+             * True if the result was thrown during the evaluation.
+             */
+            wasThrown?: boolean | undefined;
+            /**
+             * True if the property is owned for the object.
+             */
+            isOwn?: boolean | undefined;
+            /**
+             * Property symbol object, if the property is of the <code>symbol</code> type.
+             */
+            symbol?: RemoteObject | undefined;
+        }
+        /**
+         * Object internal property descriptor. This property isn't normally visible in JavaScript code.
+         */
+        interface InternalPropertyDescriptor {
+            /**
+             * Conventional property name.
+             */
+            name: string;
+            /**
+             * The value associated with the property.
+             */
+            value?: RemoteObject | undefined;
+        }
+        /**
+         * Represents function call argument. Either remote object id <code>objectId</code>, primitive <code>value</code>, unserializable primitive value or neither of (for undefined) them should be specified.
+         */
+        interface CallArgument {
+            /**
+             * Primitive value or serializable javascript object.
+             */
+            value?: any;
+            /**
+             * Primitive value which can not be JSON-stringified.
+             */
+            unserializableValue?: UnserializableValue | undefined;
+            /**
+             * Remote object handle.
+             */
+            objectId?: RemoteObjectId | undefined;
+        }
+        /**
+         * Id of an execution context.
+         */
+        type ExecutionContextId = number;
+        /**
+         * Description of an isolated world.
+         */
+        interface ExecutionContextDescription {
+            /**
+             * Unique id of the execution context. It can be used to specify in which execution context script evaluation should be performed.
+             */
+            id: ExecutionContextId;
+            /**
+             * Execution context origin.
+             */
+            origin: string;
+            /**
+             * Human readable name describing given context.
+             */
+            name: string;
+            /**
+             * Embedder-specific auxiliary data.
+             */
+            auxData?: object | undefined;
+        }
+        /**
+         * Detailed information about exception (or error) that was thrown during script compilation or execution.
+         */
+        interface ExceptionDetails {
+            /**
+             * Exception id.
+             */
+            exceptionId: number;
+            /**
+             * Exception text, which should be used together with exception object when available.
+             */
+            text: string;
+            /**
+             * Line number of the exception location (0-based).
+             */
+            lineNumber: number;
+            /**
+             * Column number of the exception location (0-based).
+             */
+            columnNumber: number;
+            /**
+             * Script ID of the exception location.
+             */
+            scriptId?: ScriptId | undefined;
+            /**
+             * URL of the exception location, to be used when the script was not reported.
+             */
+            url?: string | undefined;
+            /**
+             * JavaScript stack trace if available.
+             */
+            stackTrace?: StackTrace | undefined;
+            /**
+             * Exception object if available.
+             */
+            exception?: RemoteObject | undefined;
+            /**
+             * Identifier of the context where exception happened.
+             */
+            executionContextId?: ExecutionContextId | undefined;
+        }
+        /**
+         * Number of milliseconds since epoch.
+         */
+        type Timestamp = number;
+        /**
+         * Stack entry for runtime errors and assertions.
+         */
+        interface CallFrame {
+            /**
+             * JavaScript function name.
+             */
+            functionName: string;
+            /**
+             * JavaScript script id.
+             */
+            scriptId: ScriptId;
+            /**
+             * JavaScript script name or url.
+             */
+            url: string;
+            /**
+             * JavaScript script line number (0-based).
+             */
+            lineNumber: number;
+            /**
+             * JavaScript script column number (0-based).
+             */
+            columnNumber: number;
+        }
+        /**
+         * Call frames for assertions or error messages.
+         */
+        interface StackTrace {
+            /**
+             * String label of this stack trace. For async traces this may be a name of the function that initiated the async call.
+             */
+            description?: string | undefined;
+            /**
+             * JavaScript function name.
+             */
+            callFrames: CallFrame[];
+            /**
+             * Asynchronous JavaScript stack trace that preceded this stack, if available.
+             */
+            parent?: StackTrace | undefined;
+            /**
+             * Asynchronous JavaScript stack trace that preceded this stack, if available.
+             * @experimental
+             */
+            parentId?: StackTraceId | undefined;
+        }
+        /**
+         * Unique identifier of current debugger.
+         * @experimental
+         */
+        type UniqueDebuggerId = string;
+        /**
+         * If <code>debuggerId</code> is set stack trace comes from another debugger and can be resolved there. This allows to track cross-debugger calls. See <code>Runtime.StackTrace</code> and <code>Debugger.paused</code> for usages.
+         * @experimental
+         */
+        interface StackTraceId {
+            id: string;
+            debuggerId?: UniqueDebuggerId | undefined;
+        }
+        interface EvaluateParameterType {
+            /**
+             * Expression to evaluate.
+             */
+            expression: string;
+            /**
+             * Symbolic group name that can be used to release multiple objects.
+             */
+            objectGroup?: string | undefined;
+            /**
+             * Determines whether Command Line API should be available during the evaluation.
+             */
+            includeCommandLineAPI?: boolean | undefined;
+            /**
+             * In silent mode exceptions thrown during evaluation are not reported and do not pause execution. Overrides <code>setPauseOnException</code> state.
+             */
+            silent?: boolean | undefined;
+            /**
+             * Specifies in which execution context to perform evaluation. If the parameter is omitted the evaluation will be performed in the context of the inspected page.
+             */
+            contextId?: ExecutionContextId | undefined;
+            /**
+             * Whether the result is expected to be a JSON object that should be sent by value.
+             */
+            returnByValue?: boolean | undefined;
+            /**
+             * Whether preview should be generated for the result.
+             * @experimental
+             */
+            generatePreview?: boolean | undefined;
+            /**
+             * Whether execution should be treated as initiated by user in the UI.
+             */
+            userGesture?: boolean | undefined;
+            /**
+             * Whether execution should <code>await</code> for resulting value and return once awaited promise is resolved.
+             */
+            awaitPromise?: boolean | undefined;
+        }
+        interface AwaitPromiseParameterType {
+            /**
+             * Identifier of the promise.
+             */
+            promiseObjectId: RemoteObjectId;
+            /**
+             * Whether the result is expected to be a JSON object that should be sent by value.
+             */
+            returnByValue?: boolean | undefined;
+            /**
+             * Whether preview should be generated for the result.
+             */
+            generatePreview?: boolean | undefined;
+        }
+        interface CallFunctionOnParameterType {
+            /**
+             * Declaration of the function to call.
+             */
+            functionDeclaration: string;
+            /**
+             * Identifier of the object to call function on. Either objectId or executionContextId should be specified.
+             */
+            objectId?: RemoteObjectId | undefined;
+            /**
+             * Call arguments. All call arguments must belong to the same JavaScript world as the target object.
+             */
+            arguments?: CallArgument[] | undefined;
+            /**
+             * In silent mode exceptions thrown during evaluation are not reported and do not pause execution. Overrides <code>setPauseOnException</code> state.
+             */
+            silent?: boolean | undefined;
+            /**
+             * Whether the result is expected to be a JSON object which should be sent by value.
+             */
+            returnByValue?: boolean | undefined;
+            /**
+             * Whether preview should be generated for the result.
+             * @experimental
+             */
+            generatePreview?: boolean | undefined;
+            /**
+             * Whether execution should be treated as initiated by user in the UI.
+             */
+            userGesture?: boolean | undefined;
+            /**
+             * Whether execution should <code>await</code> for resulting value and return once awaited promise is resolved.
+             */
+            awaitPromise?: boolean | undefined;
+            /**
+             * Specifies execution context which global object will be used to call function on. Either executionContextId or objectId should be specified.
+             */
+            executionContextId?: ExecutionContextId | undefined;
+            /**
+             * Symbolic group name that can be used to release multiple objects. If objectGroup is not specified and objectId is, objectGroup will be inherited from object.
+             */
+            objectGroup?: string | undefined;
+        }
+        interface GetPropertiesParameterType {
+            /**
+             * Identifier of the object to return properties for.
+             */
+            objectId: RemoteObjectId;
+            /**
+             * If true, returns properties belonging only to the element itself, not to its prototype chain.
+             */
+            ownProperties?: boolean | undefined;
+            /**
+             * If true, returns accessor properties (with getter/setter) only; internal properties are not returned either.
+             * @experimental
+             */
+            accessorPropertiesOnly?: boolean | undefined;
+            /**
+             * Whether preview should be generated for the results.
+             * @experimental
+             */
+            generatePreview?: boolean | undefined;
+        }
+        interface ReleaseObjectParameterType {
+            /**
+             * Identifier of the object to release.
+             */
+            objectId: RemoteObjectId;
+        }
+        interface ReleaseObjectGroupParameterType {
+            /**
+             * Symbolic object group name.
+             */
+            objectGroup: string;
+        }
+        interface SetCustomObjectFormatterEnabledParameterType {
+            enabled: boolean;
+        }
+        interface CompileScriptParameterType {
+            /**
+             * Expression to compile.
+             */
+            expression: string;
+            /**
+             * Source url to be set for the script.
+             */
+            sourceURL: string;
+            /**
+             * Specifies whether the compiled script should be persisted.
+             */
+            persistScript: boolean;
+            /**
+             * Specifies in which execution context to perform script run. If the parameter is omitted the evaluation will be performed in the context of the inspected page.
+             */
+            executionContextId?: ExecutionContextId | undefined;
+        }
+        interface RunScriptParameterType {
+            /**
+             * Id of the script to run.
+             */
+            scriptId: ScriptId;
+            /**
+             * Specifies in which execution context to perform script run. If the parameter is omitted the evaluation will be performed in the context of the inspected page.
+             */
+            executionContextId?: ExecutionContextId | undefined;
+            /**
+             * Symbolic group name that can be used to release multiple objects.
+             */
+            objectGroup?: string | undefined;
+            /**
+             * In silent mode exceptions thrown during evaluation are not reported and do not pause execution. Overrides <code>setPauseOnException</code> state.
+             */
+            silent?: boolean | undefined;
+            /**
+             * Determines whether Command Line API should be available during the evaluation.
+             */
+            includeCommandLineAPI?: boolean | undefined;
+            /**
+             * Whether the result is expected to be a JSON object which should be sent by value.
+             */
+            returnByValue?: boolean | undefined;
+            /**
+             * Whether preview should be generated for the result.
+             */
+            generatePreview?: boolean | undefined;
+            /**
+             * Whether execution should <code>await</code> for resulting value and return once awaited promise is resolved.
+             */
+            awaitPromise?: boolean | undefined;
+        }
+        interface QueryObjectsParameterType {
+            /**
+             * Identifier of the prototype to return objects for.
+             */
+            prototypeObjectId: RemoteObjectId;
+        }
+        interface GlobalLexicalScopeNamesParameterType {
+            /**
+             * Specifies in which execution context to lookup global scope variables.
+             */
+            executionContextId?: ExecutionContextId | undefined;
+        }
+        interface EvaluateReturnType {
+            /**
+             * Evaluation result.
+             */
+            result: RemoteObject;
+            /**
+             * Exception details.
+             */
+            exceptionDetails?: ExceptionDetails | undefined;
+        }
+        interface AwaitPromiseReturnType {
+            /**
+             * Promise result. Will contain rejected value if promise was rejected.
+             */
+            result: RemoteObject;
+            /**
+             * Exception details if stack strace is available.
+             */
+            exceptionDetails?: ExceptionDetails | undefined;
+        }
+        interface CallFunctionOnReturnType {
+            /**
+             * Call result.
+             */
+            result: RemoteObject;
+            /**
+             * Exception details.
+             */
+            exceptionDetails?: ExceptionDetails | undefined;
+        }
+        interface GetPropertiesReturnType {
+            /**
+             * Object properties.
+             */
+            result: PropertyDescriptor[];
+            /**
+             * Internal object properties (only of the element itself).
+             */
+            internalProperties?: InternalPropertyDescriptor[] | undefined;
+            /**
+             * Exception details.
+             */
+            exceptionDetails?: ExceptionDetails | undefined;
+        }
+        interface CompileScriptReturnType {
+            /**
+             * Id of the script.
+             */
+            scriptId?: ScriptId | undefined;
+            /**
+             * Exception details.
+             */
+            exceptionDetails?: ExceptionDetails | undefined;
+        }
+        interface RunScriptReturnType {
+            /**
+             * Run result.
+             */
+            result: RemoteObject;
+            /**
+             * Exception details.
+             */
+            exceptionDetails?: ExceptionDetails | undefined;
+        }
+        interface QueryObjectsReturnType {
+            /**
+             * Array with objects.
+             */
+            objects: RemoteObject;
+        }
+        interface GlobalLexicalScopeNamesReturnType {
+            names: string[];
+        }
+        interface ExecutionContextCreatedEventDataType {
+            /**
+             * A newly created execution context.
+             */
+            context: ExecutionContextDescription;
+        }
+        interface ExecutionContextDestroyedEventDataType {
+            /**
+             * Id of the destroyed context
+             */
+            executionContextId: ExecutionContextId;
+        }
+        interface ExceptionThrownEventDataType {
+            /**
+             * Timestamp of the exception.
+             */
+            timestamp: Timestamp;
+            exceptionDetails: ExceptionDetails;
+        }
+        interface ExceptionRevokedEventDataType {
+            /**
+             * Reason describing why exception was revoked.
+             */
+            reason: string;
+            /**
+             * The id of revoked exception, as reported in <code>exceptionThrown</code>.
+             */
+            exceptionId: number;
+        }
+        interface ConsoleAPICalledEventDataType {
+            /**
+             * Type of the call.
+             */
+            type: string;
+            /**
+             * Call arguments.
+             */
+            args: RemoteObject[];
+            /**
+             * Identifier of the context where the call was made.
+             */
+            executionContextId: ExecutionContextId;
+            /**
+             * Call timestamp.
+             */
+            timestamp: Timestamp;
+            /**
+             * Stack trace captured when the call was made.
+             */
+            stackTrace?: StackTrace | undefined;
+            /**
+             * Console context descriptor for calls on non-default console context (not console.*): 'anonymous#unique-logger-id' for call on unnamed context, 'name#unique-logger-id' for call on named context.
+             * @experimental
+             */
+            context?: string | undefined;
+        }
+        interface InspectRequestedEventDataType {
+            object: RemoteObject;
+            hints: object;
+        }
+    }
+    namespace Debugger {
+        /**
+         * Breakpoint identifier.
+         */
+        type BreakpointId = string;
+        /**
+         * Call frame identifier.
+         */
+        type CallFrameId = string;
+        /**
+         * Location in the source code.
+         */
+        interface Location {
+            /**
+             * Script identifier as reported in the <code>Debugger.scriptParsed</code>.
+             */
+            scriptId: Runtime.ScriptId;
+            /**
+             * Line number in the script (0-based).
+             */
+            lineNumber: number;
+            /**
+             * Column number in the script (0-based).
+             */
+            columnNumber?: number | undefined;
+        }
+        /**
+         * Location in the source code.
+         * @experimental
+         */
+        interface ScriptPosition {
+            lineNumber: number;
+            columnNumber: number;
+        }
+        /**
+         * JavaScript call frame. Array of call frames form the call stack.
+         */
+        interface CallFrame {
+            /**
+             * Call frame identifier. This identifier is only valid while the virtual machine is paused.
+             */
+            callFrameId: CallFrameId;
+            /**
+             * Name of the JavaScript function called on this call frame.
+             */
+            functionName: string;
+            /**
+             * Location in the source code.
+             */
+            functionLocation?: Location | undefined;
+            /**
+             * Location in the source code.
+             */
+            location: Location;
+            /**
+             * JavaScript script name or url.
+             */
+            url: string;
+            /**
+             * Scope chain for this call frame.
+             */
+            scopeChain: Scope[];
+            /**
+             * <code>this</code> object for this call frame.
+             */
+            this: Runtime.RemoteObject;
+            /**
+             * The value being returned, if the function is at return point.
+             */
+            returnValue?: Runtime.RemoteObject | undefined;
+        }
+        /**
+         * Scope description.
+         */
+        interface Scope {
+            /**
+             * Scope type.
+             */
+            type: string;
+            /**
+             * Object representing the scope. For <code>global</code> and <code>with</code> scopes it represents the actual object; for the rest of the scopes, it is artificial transient object enumerating scope variables as its properties.
+             */
+            object: Runtime.RemoteObject;
+            name?: string | undefined;
+            /**
+             * Location in the source code where scope starts
+             */
+            startLocation?: Location | undefined;
+            /**
+             * Location in the source code where scope ends
+             */
+            endLocation?: Location | undefined;
+        }
+        /**
+         * Search match for resource.
+         */
+        interface SearchMatch {
+            /**
+             * Line number in resource content.
+             */
+            lineNumber: number;
+            /**
+             * Line with match content.
+             */
+            lineContent: string;
+        }
+        interface BreakLocation {
+            /**
+             * Script identifier as reported in the <code>Debugger.scriptParsed</code>.
+             */
+            scriptId: Runtime.ScriptId;
+            /**
+             * Line number in the script (0-based).
+             */
+            lineNumber: number;
+            /**
+             * Column number in the script (0-based).
+             */
+            columnNumber?: number | undefined;
+            type?: string | undefined;
+        }
+        interface SetBreakpointsActiveParameterType {
+            /**
+             * New value for breakpoints active state.
+             */
+            active: boolean;
+        }
+        interface SetSkipAllPausesParameterType {
+            /**
+             * New value for skip pauses state.
+             */
+            skip: boolean;
+        }
+        interface SetBreakpointByUrlParameterType {
+            /**
+             * Line number to set breakpoint at.
+             */
+            lineNumber: number;
+            /**
+             * URL of the resources to set breakpoint on.
+             */
+            url?: string | undefined;
+            /**
+             * Regex pattern for the URLs of the resources to set breakpoints on. Either <code>url</code> or <code>urlRegex</code> must be specified.
+             */
+            urlRegex?: string | undefined;
+            /**
+             * Script hash of the resources to set breakpoint on.
+             */
+            scriptHash?: string | undefined;
+            /**
+             * Offset in the line to set breakpoint at.
+             */
+            columnNumber?: number | undefined;
+            /**
+             * Expression to use as a breakpoint condition. When specified, debugger will only stop on the breakpoint if this expression evaluates to true.
+             */
+            condition?: string | undefined;
+        }
+        interface SetBreakpointParameterType {
+            /**
+             * Location to set breakpoint in.
+             */
+            location: Location;
+            /**
+             * Expression to use as a breakpoint condition. When specified, debugger will only stop on the breakpoint if this expression evaluates to true.
+             */
+            condition?: string | undefined;
+        }
+        interface RemoveBreakpointParameterType {
+            breakpointId: BreakpointId;
+        }
+        interface GetPossibleBreakpointsParameterType {
+            /**
+             * Start of range to search possible breakpoint locations in.
+             */
+            start: Location;
+            /**
+             * End of range to search possible breakpoint locations in (excluding). When not specified, end of scripts is used as end of range.
+             */
+            end?: Location | undefined;
+            /**
+             * Only consider locations which are in the same (non-nested) function as start.
+             */
+            restrictToFunction?: boolean | undefined;
+        }
+        interface ContinueToLocationParameterType {
+            /**
+             * Location to continue to.
+             */
+            location: Location;
+            targetCallFrames?: string | undefined;
+        }
+        interface PauseOnAsyncCallParameterType {
+            /**
+             * Debugger will pause when async call with given stack trace is started.
+             */
+            parentStackTraceId: Runtime.StackTraceId;
+        }
+        interface StepIntoParameterType {
+            /**
+             * Debugger will issue additional Debugger.paused notification if any async task is scheduled before next pause.
+             * @experimental
+             */
+            breakOnAsyncCall?: boolean | undefined;
+        }
+        interface GetStackTraceParameterType {
+            stackTraceId: Runtime.StackTraceId;
+        }
+        interface SearchInContentParameterType {
+            /**
+             * Id of the script to search in.
+             */
+            scriptId: Runtime.ScriptId;
+            /**
+             * String to search for.
+             */
+            query: string;
+            /**
+             * If true, search is case sensitive.
+             */
+            caseSensitive?: boolean | undefined;
+            /**
+             * If true, treats string parameter as regex.
+             */
+            isRegex?: boolean | undefined;
+        }
+        interface SetScriptSourceParameterType {
+            /**
+             * Id of the script to edit.
+             */
+            scriptId: Runtime.ScriptId;
+            /**
+             * New content of the script.
+             */
+            scriptSource: string;
+            /**
+             *  If true the change will not actually be applied. Dry run may be used to get result description without actually modifying the code.
+             */
+            dryRun?: boolean | undefined;
+        }
+        interface RestartFrameParameterType {
+            /**
+             * Call frame identifier to evaluate on.
+             */
+            callFrameId: CallFrameId;
+        }
+        interface GetScriptSourceParameterType {
+            /**
+             * Id of the script to get source for.
+             */
+            scriptId: Runtime.ScriptId;
+        }
+        interface SetPauseOnExceptionsParameterType {
+            /**
+             * Pause on exceptions mode.
+             */
+            state: string;
+        }
+        interface EvaluateOnCallFrameParameterType {
+            /**
+             * Call frame identifier to evaluate on.
+             */
+            callFrameId: CallFrameId;
+            /**
+             * Expression to evaluate.
+             */
+            expression: string;
+            /**
+             * String object group name to put result into (allows rapid releasing resulting object handles using <code>releaseObjectGroup</code>).
+             */
+            objectGroup?: string | undefined;
+            /**
+             * Specifies whether command line API should be available to the evaluated expression, defaults to false.
+             */
+            includeCommandLineAPI?: boolean | undefined;
+            /**
+             * In silent mode exceptions thrown during evaluation are not reported and do not pause execution. Overrides <code>setPauseOnException</code> state.
+             */
+            silent?: boolean | undefined;
+            /**
+             * Whether the result is expected to be a JSON object that should be sent by value.
+             */
+            returnByValue?: boolean | undefined;
+            /**
+             * Whether preview should be generated for the result.
+             * @experimental
+             */
+            generatePreview?: boolean | undefined;
+            /**
+             * Whether to throw an exception if side effect cannot be ruled out during evaluation.
+             */
+            throwOnSideEffect?: boolean | undefined;
+        }
+        interface SetVariableValueParameterType {
+            /**
+             * 0-based number of scope as was listed in scope chain. Only 'local', 'closure' and 'catch' scope types are allowed. Other scopes could be manipulated manually.
+             */
+            scopeNumber: number;
+            /**
+             * Variable name.
+             */
+            variableName: string;
+            /**
+             * New variable value.
+             */
+            newValue: Runtime.CallArgument;
+            /**
+             * Id of callframe that holds variable.
+             */
+            callFrameId: CallFrameId;
+        }
+        interface SetReturnValueParameterType {
+            /**
+             * New return value.
+             */
+            newValue: Runtime.CallArgument;
+        }
+        interface SetAsyncCallStackDepthParameterType {
+            /**
+             * Maximum depth of async call stacks. Setting to <code>0</code> will effectively disable collecting async call stacks (default).
+             */
+            maxDepth: number;
+        }
+        interface SetBlackboxPatternsParameterType {
+            /**
+             * Array of regexps that will be used to check script url for blackbox state.
+             */
+            patterns: string[];
+        }
+        interface SetBlackboxedRangesParameterType {
+            /**
+             * Id of the script.
+             */
+            scriptId: Runtime.ScriptId;
+            positions: ScriptPosition[];
+        }
+        interface EnableReturnType {
+            /**
+             * Unique identifier of the debugger.
+             * @experimental
+             */
+            debuggerId: Runtime.UniqueDebuggerId;
+        }
+        interface SetBreakpointByUrlReturnType {
+            /**
+             * Id of the created breakpoint for further reference.
+             */
+            breakpointId: BreakpointId;
+            /**
+             * List of the locations this breakpoint resolved into upon addition.
+             */
+            locations: Location[];
+        }
+        interface SetBreakpointReturnType {
+            /**
+             * Id of the created breakpoint for further reference.
+             */
+            breakpointId: BreakpointId;
+            /**
+             * Location this breakpoint resolved into.
+             */
+            actualLocation: Location;
+        }
+        interface GetPossibleBreakpointsReturnType {
+            /**
+             * List of the possible breakpoint locations.
+             */
+            locations: BreakLocation[];
+        }
+        interface GetStackTraceReturnType {
+            stackTrace: Runtime.StackTrace;
+        }
+        interface SearchInContentReturnType {
+            /**
+             * List of search matches.
+             */
+            result: SearchMatch[];
+        }
+        interface SetScriptSourceReturnType {
+            /**
+             * New stack trace in case editing has happened while VM was stopped.
+             */
+            callFrames?: CallFrame[] | undefined;
+            /**
+             * Whether current call stack  was modified after applying the changes.
+             */
+            stackChanged?: boolean | undefined;
+            /**
+             * Async stack trace, if any.
+             */
+            asyncStackTrace?: Runtime.StackTrace | undefined;
+            /**
+             * Async stack trace, if any.
+             * @experimental
+             */
+            asyncStackTraceId?: Runtime.StackTraceId | undefined;
+            /**
+             * Exception details if any.
+             */
+            exceptionDetails?: Runtime.ExceptionDetails | undefined;
+        }
+        interface RestartFrameReturnType {
+            /**
+             * New stack trace.
+             */
+            callFrames: CallFrame[];
+            /**
+             * Async stack trace, if any.
+             */
+            asyncStackTrace?: Runtime.StackTrace | undefined;
+            /**
+             * Async stack trace, if any.
+             * @experimental
+             */
+            asyncStackTraceId?: Runtime.StackTraceId | undefined;
+        }
+        interface GetScriptSourceReturnType {
+            /**
+             * Script source.
+             */
+            scriptSource: string;
+        }
+        interface EvaluateOnCallFrameReturnType {
+            /**
+             * Object wrapper for the evaluation result.
+             */
+            result: Runtime.RemoteObject;
+            /**
+             * Exception details.
+             */
+            exceptionDetails?: Runtime.ExceptionDetails | undefined;
+        }
+        interface ScriptParsedEventDataType {
+            /**
+             * Identifier of the script parsed.
+             */
+            scriptId: Runtime.ScriptId;
+            /**
+             * URL or name of the script parsed (if any).
+             */
+            url: string;
+            /**
+             * Line offset of the script within the resource with given URL (for script tags).
+             */
+            startLine: number;
+            /**
+             * Column offset of the script within the resource with given URL.
+             */
+            startColumn: number;
+            /**
+             * Last line of the script.
+             */
+            endLine: number;
+            /**
+             * Length of the last line of the script.
+             */
+            endColumn: number;
+            /**
+             * Specifies script creation context.
+             */
+            executionContextId: Runtime.ExecutionContextId;
+            /**
+             * Content hash of the script.
+             */
+            hash: string;
+            /**
+             * Embedder-specific auxiliary data.
+             */
+            executionContextAuxData?: object | undefined;
+            /**
+             * True, if this script is generated as a result of the live edit operation.
+             * @experimental
+             */
+            isLiveEdit?: boolean | undefined;
+            /**
+             * URL of source map associated with script (if any).
+             */
+            sourceMapURL?: string | undefined;
+            /**
+             * True, if this script has sourceURL.
+             */
+            hasSourceURL?: boolean | undefined;
+            /**
+             * True, if this script is ES6 module.
+             */
+            isModule?: boolean | undefined;
+            /**
+             * This script length.
+             */
+            length?: number | undefined;
+            /**
+             * JavaScript top stack frame of where the script parsed event was triggered if available.
+             * @experimental
+             */
+            stackTrace?: Runtime.StackTrace | undefined;
+        }
+        interface ScriptFailedToParseEventDataType {
+            /**
+             * Identifier of the script parsed.
+             */
+            scriptId: Runtime.ScriptId;
+            /**
+             * URL or name of the script parsed (if any).
+             */
+            url: string;
+            /**
+             * Line offset of the script within the resource with given URL (for script tags).
+             */
+            startLine: number;
+            /**
+             * Column offset of the script within the resource with given URL.
+             */
+            startColumn: number;
+            /**
+             * Last line of the script.
+             */
+            endLine: number;
+            /**
+             * Length of the last line of the script.
+             */
+            endColumn: number;
+            /**
+             * Specifies script creation context.
+             */
+            executionContextId: Runtime.ExecutionContextId;
+            /**
+             * Content hash of the script.
+             */
+            hash: string;
+            /**
+             * Embedder-specific auxiliary data.
+             */
+            executionContextAuxData?: object | undefined;
+            /**
+             * URL of source map associated with script (if any).
+             */
+            sourceMapURL?: string | undefined;
+            /**
+             * True, if this script has sourceURL.
+             */
+            hasSourceURL?: boolean | undefined;
+            /**
+             * True, if this script is ES6 module.
+             */
+            isModule?: boolean | undefined;
+            /**
+             * This script length.
+             */
+            length?: number | undefined;
+            /**
+             * JavaScript top stack frame of where the script parsed event was triggered if available.
+             * @experimental
+             */
+            stackTrace?: Runtime.StackTrace | undefined;
+        }
+        interface BreakpointResolvedEventDataType {
+            /**
+             * Breakpoint unique identifier.
+             */
+            breakpointId: BreakpointId;
+            /**
+             * Actual breakpoint location.
+             */
+            location: Location;
+        }
+        interface PausedEventDataType {
+            /**
+             * Call stack the virtual machine stopped on.
+             */
+            callFrames: CallFrame[];
+            /**
+             * Pause reason.
+             */
+            reason: string;
+            /**
+             * Object containing break-specific auxiliary properties.
+             */
+            data?: object | undefined;
+            /**
+             * Hit breakpoints IDs
+             */
+            hitBreakpoints?: string[] | undefined;
+            /**
+             * Async stack trace, if any.
+             */
+            asyncStackTrace?: Runtime.StackTrace | undefined;
+            /**
+             * Async stack trace, if any.
+             * @experimental
+             */
+            asyncStackTraceId?: Runtime.StackTraceId | undefined;
+            /**
+             * Just scheduled async call will have this stack trace as parent stack during async execution. This field is available only after <code>Debugger.stepInto</code> call with <code>breakOnAsynCall</code> flag.
+             * @experimental
+             */
+            asyncCallStackTraceId?: Runtime.StackTraceId | undefined;
+        }
+    }
+    namespace Console {
+        /**
+         * Console message.
+         */
+        interface ConsoleMessage {
+            /**
+             * Message source.
+             */
+            source: string;
+            /**
+             * Message severity.
+             */
+            level: string;
+            /**
+             * Message text.
+             */
+            text: string;
+            /**
+             * URL of the message origin.
+             */
+            url?: string | undefined;
+            /**
+             * Line number in the resource that generated this message (1-based).
+             */
+            line?: number | undefined;
+            /**
+             * Column number in the resource that generated this message (1-based).
+             */
+            column?: number | undefined;
+        }
+        interface MessageAddedEventDataType {
+            /**
+             * Console message that has been added.
+             */
+            message: ConsoleMessage;
+        }
+    }
+    namespace Profiler {
+        /**
+         * Profile node. Holds callsite information, execution statistics and child nodes.
+         */
+        interface ProfileNode {
+            /**
+             * Unique id of the node.
+             */
+            id: number;
+            /**
+             * Function location.
+             */
+            callFrame: Runtime.CallFrame;
+            /**
+             * Number of samples where this node was on top of the call stack.
+             */
+            hitCount?: number | undefined;
+            /**
+             * Child node ids.
+             */
+            children?: number[] | undefined;
+            /**
+             * The reason of being not optimized. The function may be deoptimized or marked as don't optimize.
+             */
+            deoptReason?: string | undefined;
+            /**
+             * An array of source position ticks.
+             */
+            positionTicks?: PositionTickInfo[] | undefined;
+        }
+        /**
+         * Profile.
+         */
+        interface Profile {
+            /**
+             * The list of profile nodes. First item is the root node.
+             */
+            nodes: ProfileNode[];
+            /**
+             * Profiling start timestamp in microseconds.
+             */
+            startTime: number;
+            /**
+             * Profiling end timestamp in microseconds.
+             */
+            endTime: number;
+            /**
+             * Ids of samples top nodes.
+             */
+            samples?: number[] | undefined;
+            /**
+             * Time intervals between adjacent samples in microseconds. The first delta is relative to the profile startTime.
+             */
+            timeDeltas?: number[] | undefined;
+        }
+        /**
+         * Specifies a number of samples attributed to a certain source position.
+         */
+        interface PositionTickInfo {
+            /**
+             * Source line number (1-based).
+             */
+            line: number;
+            /**
+             * Number of samples attributed to the source line.
+             */
+            ticks: number;
+        }
+        /**
+         * Coverage data for a source range.
+         */
+        interface CoverageRange {
+            /**
+             * JavaScript script source offset for the range start.
+             */
+            startOffset: number;
+            /**
+             * JavaScript script source offset for the range end.
+             */
+            endOffset: number;
+            /**
+             * Collected execution count of the source range.
+             */
+            count: number;
+        }
+        /**
+         * Coverage data for a JavaScript function.
+         */
+        interface FunctionCoverage {
+            /**
+             * JavaScript function name.
+             */
+            functionName: string;
+            /**
+             * Source ranges inside the function with coverage data.
+             */
+            ranges: CoverageRange[];
+            /**
+             * Whether coverage data for this function has block granularity.
+             */
+            isBlockCoverage: boolean;
+        }
+        /**
+         * Coverage data for a JavaScript script.
+         */
+        interface ScriptCoverage {
+            /**
+             * JavaScript script id.
+             */
+            scriptId: Runtime.ScriptId;
+            /**
+             * JavaScript script name or url.
+             */
+            url: string;
+            /**
+             * Functions contained in the script that has coverage data.
+             */
+            functions: FunctionCoverage[];
+        }
+        interface SetSamplingIntervalParameterType {
+            /**
+             * New sampling interval in microseconds.
+             */
+            interval: number;
+        }
+        interface StartPreciseCoverageParameterType {
+            /**
+             * Collect accurate call counts beyond simple 'covered' or 'not covered'.
+             */
+            callCount?: boolean | undefined;
+            /**
+             * Collect block-based coverage.
+             */
+            detailed?: boolean | undefined;
+        }
+        interface StopReturnType {
+            /**
+             * Recorded profile.
+             */
+            profile: Profile;
+        }
+        interface TakePreciseCoverageReturnType {
+            /**
+             * Coverage data for the current isolate.
+             */
+            result: ScriptCoverage[];
+        }
+        interface GetBestEffortCoverageReturnType {
+            /**
+             * Coverage data for the current isolate.
+             */
+            result: ScriptCoverage[];
+        }
+        interface ConsoleProfileStartedEventDataType {
+            id: string;
+            /**
+             * Location of console.profile().
+             */
+            location: Debugger.Location;
+            /**
+             * Profile title passed as an argument to console.profile().
+             */
+            title?: string | undefined;
+        }
+        interface ConsoleProfileFinishedEventDataType {
+            id: string;
+            /**
+             * Location of console.profileEnd().
+             */
+            location: Debugger.Location;
+            profile: Profile;
+            /**
+             * Profile title passed as an argument to console.profile().
+             */
+            title?: string | undefined;
+        }
+    }
+    namespace HeapProfiler {
+        /**
+         * Heap snapshot object id.
+         */
+        type HeapSnapshotObjectId = string;
+        /**
+         * Sampling Heap Profile node. Holds callsite information, allocation statistics and child nodes.
+         */
+        interface SamplingHeapProfileNode {
+            /**
+             * Function location.
+             */
+            callFrame: Runtime.CallFrame;
+            /**
+             * Allocations size in bytes for the node excluding children.
+             */
+            selfSize: number;
+            /**
+             * Child nodes.
+             */
+            children: SamplingHeapProfileNode[];
+        }
+        /**
+         * Profile.
+         */
+        interface SamplingHeapProfile {
+            head: SamplingHeapProfileNode;
+        }
+        interface StartTrackingHeapObjectsParameterType {
+            trackAllocations?: boolean | undefined;
+        }
+        interface StopTrackingHeapObjectsParameterType {
+            /**
+             * If true 'reportHeapSnapshotProgress' events will be generated while snapshot is being taken when the tracking is stopped.
+             */
+            reportProgress?: boolean | undefined;
+        }
+        interface TakeHeapSnapshotParameterType {
+            /**
+             * If true 'reportHeapSnapshotProgress' events will be generated while snapshot is being taken.
+             */
+            reportProgress?: boolean | undefined;
+        }
+        interface GetObjectByHeapObjectIdParameterType {
+            objectId: HeapSnapshotObjectId;
+            /**
+             * Symbolic group name that can be used to release multiple objects.
+             */
+            objectGroup?: string | undefined;
+        }
+        interface AddInspectedHeapObjectParameterType {
+            /**
+             * Heap snapshot object id to be accessible by means of $x command line API.
+             */
+            heapObjectId: HeapSnapshotObjectId;
+        }
+        interface GetHeapObjectIdParameterType {
+            /**
+             * Identifier of the object to get heap object id for.
+             */
+            objectId: Runtime.RemoteObjectId;
+        }
+        interface StartSamplingParameterType {
+            /**
+             * Average sample interval in bytes. Poisson distribution is used for the intervals. The default value is 32768 bytes.
+             */
+            samplingInterval?: number | undefined;
+        }
+        interface GetObjectByHeapObjectIdReturnType {
+            /**
+             * Evaluation result.
+             */
+            result: Runtime.RemoteObject;
+        }
+        interface GetHeapObjectIdReturnType {
+            /**
+             * Id of the heap snapshot object corresponding to the passed remote object id.
+             */
+            heapSnapshotObjectId: HeapSnapshotObjectId;
+        }
+        interface StopSamplingReturnType {
+            /**
+             * Recorded sampling heap profile.
+             */
+            profile: SamplingHeapProfile;
+        }
+        interface GetSamplingProfileReturnType {
+            /**
+             * Return the sampling profile being collected.
+             */
+            profile: SamplingHeapProfile;
+        }
+        interface AddHeapSnapshotChunkEventDataType {
+            chunk: string;
+        }
+        interface ReportHeapSnapshotProgressEventDataType {
+            done: number;
+            total: number;
+            finished?: boolean | undefined;
+        }
+        interface LastSeenObjectIdEventDataType {
+            lastSeenObjectId: number;
+            timestamp: number;
+        }
+        interface HeapStatsUpdateEventDataType {
+            /**
+             * An array of triplets. Each triplet describes a fragment. The first integer is the fragment index, the second integer is a total count of objects for the fragment, the third integer is a total size of the objects for the fragment.
+             */
+            statsUpdate: number[];
+        }
+    }
+    namespace IO {
+        type StreamHandle = string;
+        interface ReadParameterType {
+            /**
+             * Handle of the stream to read.
+             */
+            handle: StreamHandle;
+            /**
+             * Seek to the specified offset before reading (if not specified, proceed with offset
+             * following the last read). Some types of streams may only support sequential reads.
+             */
+            offset?: number | undefined;
+            /**
+             * Maximum number of bytes to read (left upon the agent discretion if not specified).
+             */
+            size?: number | undefined;
+        }
+        interface CloseParameterType {
+            /**
+             * Handle of the stream to close.
+             */
+            handle: StreamHandle;
+        }
+        interface ReadReturnType {
+            /**
+             * Data that were read.
+             */
+            data: string;
+            /**
+             * Set if the end-of-file condition occurred while reading.
+             */
+            eof: boolean;
+        }
+    }
+    namespace Network {
+        /**
+         * Resource type as it was perceived by the rendering engine.
+         */
+        type ResourceType = string;
+        /**
+         * Unique request identifier.
+         */
+        type RequestId = string;
+        /**
+         * UTC time in seconds, counted from January 1, 1970.
+         */
+        type TimeSinceEpoch = number;
+        /**
+         * Monotonically increasing time in seconds since an arbitrary point in the past.
+         */
+        type MonotonicTime = number;
+        /**
+         * Information about the request initiator.
+         */
+        interface Initiator {
+            /**
+             * Type of this initiator.
+             */
+            type: string;
+            /**
+             * Initiator JavaScript stack trace, set for Script only.
+             * Requires the Debugger domain to be enabled.
+             */
+            stack?: Runtime.StackTrace | undefined;
+            /**
+             * Initiator URL, set for Parser type or for Script type (when script is importing module) or for SignedExchange type.
+             */
+            url?: string | undefined;
+            /**
+             * Initiator line number, set for Parser type or for Script type (when script is importing
+             * module) (0-based).
+             */
+            lineNumber?: number | undefined;
+            /**
+             * Initiator column number, set for Parser type or for Script type (when script is importing
+             * module) (0-based).
+             */
+            columnNumber?: number | undefined;
+            /**
+             * Set if another request triggered this request (e.g. preflight).
+             */
+            requestId?: RequestId | undefined;
+        }
+        /**
+         * HTTP request data.
+         */
+        interface Request {
+            url: string;
+            method: string;
+            headers: Headers;
+            hasPostData: boolean;
+        }
+        /**
+         * HTTP response data.
+         */
+        interface Response {
+            url: string;
+            status: number;
+            statusText: string;
+            headers: Headers;
+            mimeType: string;
+            charset: string;
+        }
+        /**
+         * Request / response headers as keys / values of JSON object.
+         */
+        interface Headers {
+        }
+        interface LoadNetworkResourcePageResult {
+            success: boolean;
+            stream?: IO.StreamHandle | undefined;
+        }
+        /**
+         * WebSocket response data.
+         */
+        interface WebSocketResponse {
+            /**
+             * HTTP response status code.
+             */
+            status: number;
+            /**
+             * HTTP response status text.
+             */
+            statusText: string;
+            /**
+             * HTTP response headers.
+             */
+            headers: Headers;
+        }
+        interface EnableParameterType {
+            /**
+             * Buffer size in bytes to use when preserving network payloads (XHRs, etc).
+             * @experimental
+             */
+            maxTotalBufferSize?: number | undefined;
+            /**
+             * Per-resource buffer size in bytes to use when preserving network payloads (XHRs, etc).
+             * @experimental
+             */
+            maxResourceBufferSize?: number | undefined;
+        }
+        interface GetRequestPostDataParameterType {
+            /**
+             * Identifier of the network request to get content for.
+             */
+            requestId: RequestId;
+        }
+        interface GetResponseBodyParameterType {
+            /**
+             * Identifier of the network request to get content for.
+             */
+            requestId: RequestId;
+        }
+        interface StreamResourceContentParameterType {
+            /**
+             * Identifier of the request to stream.
+             */
+            requestId: RequestId;
+        }
+        interface LoadNetworkResourceParameterType {
+            /**
+             * URL of the resource to get content for.
+             */
+            url: string;
+        }
+        interface GetRequestPostDataReturnType {
+            /**
+             * Request body string, omitting files from multipart requests
+             */
+            postData: string;
+        }
+        interface GetResponseBodyReturnType {
+            /**
+             * Response body.
+             */
+            body: string;
+            /**
+             * True, if content was sent as base64.
+             */
+            base64Encoded: boolean;
+        }
+        interface StreamResourceContentReturnType {
+            /**
+             * Data that has been buffered until streaming is enabled.
+             */
+            bufferedData: string;
+        }
+        interface LoadNetworkResourceReturnType {
+            resource: LoadNetworkResourcePageResult;
+        }
+        interface RequestWillBeSentEventDataType {
+            /**
+             * Request identifier.
+             */
+            requestId: RequestId;
+            /**
+             * Request data.
+             */
+            request: Request;
+            /**
+             * Request initiator.
+             */
+            initiator: Initiator;
+            /**
+             * Timestamp.
+             */
+            timestamp: MonotonicTime;
+            /**
+             * Timestamp.
+             */
+            wallTime: TimeSinceEpoch;
+        }
+        interface ResponseReceivedEventDataType {
+            /**
+             * Request identifier.
+             */
+            requestId: RequestId;
+            /**
+             * Timestamp.
+             */
+            timestamp: MonotonicTime;
+            /**
+             * Resource type.
+             */
+            type: ResourceType;
+            /**
+             * Response data.
+             */
+            response: Response;
+        }
+        interface LoadingFailedEventDataType {
+            /**
+             * Request identifier.
+             */
+            requestId: RequestId;
+            /**
+             * Timestamp.
+             */
+            timestamp: MonotonicTime;
+            /**
+             * Resource type.
+             */
+            type: ResourceType;
+            /**
+             * Error message.
+             */
+            errorText: string;
+        }
+        interface LoadingFinishedEventDataType {
+            /**
+             * Request identifier.
+             */
+            requestId: RequestId;
+            /**
+             * Timestamp.
+             */
+            timestamp: MonotonicTime;
+        }
+        interface DataReceivedEventDataType {
+            /**
+             * Request identifier.
+             */
+            requestId: RequestId;
+            /**
+             * Timestamp.
+             */
+            timestamp: MonotonicTime;
+            /**
+             * Data chunk length.
+             */
+            dataLength: number;
+            /**
+             * Actual bytes received (might be less than dataLength for compressed encodings).
+             */
+            encodedDataLength: number;
+            /**
+             * Data that was received.
+             * @experimental
+             */
+            data?: string | undefined;
+        }
+        interface WebSocketCreatedEventDataType {
+            /**
+             * Request identifier.
+             */
+            requestId: RequestId;
+            /**
+             * WebSocket request URL.
+             */
+            url: string;
+            /**
+             * Request initiator.
+             */
+            initiator: Initiator;
+        }
+        interface WebSocketClosedEventDataType {
+            /**
+             * Request identifier.
+             */
+            requestId: RequestId;
+            /**
+             * Timestamp.
+             */
+            timestamp: MonotonicTime;
+        }
+        interface WebSocketHandshakeResponseReceivedEventDataType {
+            /**
+             * Request identifier.
+             */
+            requestId: RequestId;
+            /**
+             * Timestamp.
+             */
+            timestamp: MonotonicTime;
+            /**
+             * WebSocket response data.
+             */
+            response: WebSocketResponse;
+        }
+    }
+    namespace NodeRuntime {
+        interface NotifyWhenWaitingForDisconnectParameterType {
+            enabled: boolean;
+        }
+    }
+    namespace NodeTracing {
+        interface TraceConfig {
+            /**
+             * Controls how the trace buffer stores data.
+             */
+            recordMode?: string | undefined;
+            /**
+             * Included category filters.
+             */
+            includedCategories: string[];
+        }
+        interface StartParameterType {
+            traceConfig: TraceConfig;
+        }
+        interface GetCategoriesReturnType {
+            /**
+             * A list of supported tracing categories.
+             */
+            categories: string[];
+        }
+        interface DataCollectedEventDataType {
+            value: object[];
+        }
+    }
+    namespace NodeWorker {
+        type WorkerID = string;
+        /**
+         * Unique identifier of attached debugging session.
+         */
+        type SessionID = string;
+        interface WorkerInfo {
+            workerId: WorkerID;
+            type: string;
+            title: string;
+            url: string;
+        }
+        interface SendMessageToWorkerParameterType {
+            message: string;
+            /**
+             * Identifier of the session.
+             */
+            sessionId: SessionID;
+        }
+        interface EnableParameterType {
+            /**
+             * Whether to new workers should be paused until the frontend sends `Runtime.runIfWaitingForDebugger`
+             * message to run them.
+             */
+            waitForDebuggerOnStart: boolean;
+        }
+        interface DetachParameterType {
+            sessionId: SessionID;
+        }
+        interface AttachedToWorkerEventDataType {
+            /**
+             * Identifier assigned to the session used to send/receive messages.
+             */
+            sessionId: SessionID;
+            workerInfo: WorkerInfo;
+            waitingForDebugger: boolean;
+        }
+        interface DetachedFromWorkerEventDataType {
+            /**
+             * Detached session identifier.
+             */
+            sessionId: SessionID;
+        }
+        interface ReceivedMessageFromWorkerEventDataType {
+            /**
+             * Identifier of a session which sends a message.
+             */
+            sessionId: SessionID;
+            message: string;
+        }
+    }
+    namespace Target {
+        type SessionID = string;
+        type TargetID = string;
+        interface TargetInfo {
+            targetId: TargetID;
+            type: string;
+            title: string;
+            url: string;
+            attached: boolean;
+            canAccessOpener: boolean;
+        }
+        interface SetAutoAttachParameterType {
+            autoAttach: boolean;
+            waitForDebuggerOnStart: boolean;
+        }
+        interface TargetCreatedEventDataType {
+            targetInfo: TargetInfo;
+        }
+        interface AttachedToTargetEventDataType {
+            sessionId: SessionID;
+            targetInfo: TargetInfo;
+            waitingForDebugger: boolean;
+        }
+    }
+    namespace DOMStorage {
+        type SerializedStorageKey = string;
+        /**
+         * DOM Storage identifier.
+         */
+        interface StorageId {
+            /**
+             * Security origin for the storage.
+             */
+            securityOrigin?: string | undefined;
+            /**
+             * Represents a key by which DOM Storage keys its CachedStorageAreas
+             */
+            storageKey?: SerializedStorageKey | undefined;
+            /**
+             * Whether the storage is local storage (not session storage).
+             */
+            isLocalStorage: boolean;
+        }
+        /**
+         * DOM Storage item.
+         */
+        type Item = string[];
+        interface ClearParameterType {
+            storageId: StorageId;
+        }
+        interface GetDOMStorageItemsParameterType {
+            storageId: StorageId;
+        }
+        interface RemoveDOMStorageItemParameterType {
+            storageId: StorageId;
+            key: string;
+        }
+        interface SetDOMStorageItemParameterType {
+            storageId: StorageId;
+            key: string;
+            value: string;
+        }
+        interface GetDOMStorageItemsReturnType {
+            entries: Item[];
+        }
+        interface DomStorageItemAddedEventDataType {
+            storageId: StorageId;
+            key: string;
+            newValue: string;
+        }
+        interface DomStorageItemRemovedEventDataType {
+            storageId: StorageId;
+            key: string;
+        }
+        interface DomStorageItemUpdatedEventDataType {
+            storageId: StorageId;
+            key: string;
+            oldValue: string;
+            newValue: string;
+        }
+        interface DomStorageItemsClearedEventDataType {
+            storageId: StorageId;
+        }
+    }
+    namespace Storage {
+        type SerializedStorageKey = string;
+        interface GetStorageKeyParameterType {
+            frameId?: string | undefined;
+        }
+        interface GetStorageKeyReturnType {
+            storageKey: SerializedStorageKey;
+        }
+    }
+    interface Session {
+        /**
+         * Posts a message to the inspector back-end. `callback` will be notified when
+         * a response is received. `callback` is a function that accepts two optional
+         * arguments: error and message-specific result.
+         *
+         * ```js
+         * session.post('Runtime.evaluate', { expression: '2 + 2' },
+         *              (error, { result }) => console.log(result));
+         * // Output: { type: 'number', value: 4, description: '4' }
+         * ```
+         *
+         * The latest version of the V8 inspector protocol is published on the
+         * [Chrome DevTools Protocol Viewer](https://chromedevtools.github.io/devtools-protocol/v8/).
+         *
+         * Node.js inspector supports all the Chrome DevTools Protocol domains declared
+         * by V8. Chrome DevTools Protocol domain provides an interface for interacting
+         * with one of the runtime agents used to inspect the application state and listen
+         * to the run-time events.
+         */
+        post(method: string, callback?: (err: Error | null, params?: object) => void): void;
+        post(method: string, params?: object, callback?: (err: Error | null, params?: object) => void): void;
+        /**
+         * Returns supported domains.
+         */
+        post(method: "Schema.getDomains", callback?: (err: Error | null, params: Schema.GetDomainsReturnType) => void): void;
+        /**
+         * Evaluates expression on global object.
+         */
+        post(method: "Runtime.evaluate", params?: Runtime.EvaluateParameterType, callback?: (err: Error | null, params: Runtime.EvaluateReturnType) => void): void;
+        post(method: "Runtime.evaluate", callback?: (err: Error | null, params: Runtime.EvaluateReturnType) => void): void;
+        /**
+         * Add handler to promise with given promise object id.
+         */
+        post(method: "Runtime.awaitPromise", params?: Runtime.AwaitPromiseParameterType, callback?: (err: Error | null, params: Runtime.AwaitPromiseReturnType) => void): void;
+        post(method: "Runtime.awaitPromise", callback?: (err: Error | null, params: Runtime.AwaitPromiseReturnType) => void): void;
+        /**
+         * Calls function with given declaration on the given object. Object group of the result is inherited from the target object.
+         */
+        post(method: "Runtime.callFunctionOn", params?: Runtime.CallFunctionOnParameterType, callback?: (err: Error | null, params: Runtime.CallFunctionOnReturnType) => void): void;
+        post(method: "Runtime.callFunctionOn", callback?: (err: Error | null, params: Runtime.CallFunctionOnReturnType) => void): void;
+        /**
+         * Returns properties of a given object. Object group of the result is inherited from the target object.
+         */
+        post(method: "Runtime.getProperties", params?: Runtime.GetPropertiesParameterType, callback?: (err: Error | null, params: Runtime.GetPropertiesReturnType) => void): void;
+        post(method: "Runtime.getProperties", callback?: (err: Error | null, params: Runtime.GetPropertiesReturnType) => void): void;
+        /**
+         * Releases remote object with given id.
+         */
+        post(method: "Runtime.releaseObject", params?: Runtime.ReleaseObjectParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Runtime.releaseObject", callback?: (err: Error | null) => void): void;
+        /**
+         * Releases all remote objects that belong to a given group.
+         */
+        post(method: "Runtime.releaseObjectGroup", params?: Runtime.ReleaseObjectGroupParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Runtime.releaseObjectGroup", callback?: (err: Error | null) => void): void;
+        /**
+         * Tells inspected instance to run if it was waiting for debugger to attach.
+         */
+        post(method: "Runtime.runIfWaitingForDebugger", callback?: (err: Error | null) => void): void;
+        /**
+         * Enables reporting of execution contexts creation by means of <code>executionContextCreated</code> event. When the reporting gets enabled the event will be sent immediately for each existing execution context.
+         */
+        post(method: "Runtime.enable", callback?: (err: Error | null) => void): void;
+        /**
+         * Disables reporting of execution contexts creation.
+         */
+        post(method: "Runtime.disable", callback?: (err: Error | null) => void): void;
+        /**
+         * Discards collected exceptions and console API calls.
+         */
+        post(method: "Runtime.discardConsoleEntries", callback?: (err: Error | null) => void): void;
+        /**
+         * @experimental
+         */
+        post(method: "Runtime.setCustomObjectFormatterEnabled", params?: Runtime.SetCustomObjectFormatterEnabledParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Runtime.setCustomObjectFormatterEnabled", callback?: (err: Error | null) => void): void;
+        /**
+         * Compiles expression.
+         */
+        post(method: "Runtime.compileScript", params?: Runtime.CompileScriptParameterType, callback?: (err: Error | null, params: Runtime.CompileScriptReturnType) => void): void;
+        post(method: "Runtime.compileScript", callback?: (err: Error | null, params: Runtime.CompileScriptReturnType) => void): void;
+        /**
+         * Runs script with given id in a given context.
+         */
+        post(method: "Runtime.runScript", params?: Runtime.RunScriptParameterType, callback?: (err: Error | null, params: Runtime.RunScriptReturnType) => void): void;
+        post(method: "Runtime.runScript", callback?: (err: Error | null, params: Runtime.RunScriptReturnType) => void): void;
+        post(method: "Runtime.queryObjects", params?: Runtime.QueryObjectsParameterType, callback?: (err: Error | null, params: Runtime.QueryObjectsReturnType) => void): void;
+        post(method: "Runtime.queryObjects", callback?: (err: Error | null, params: Runtime.QueryObjectsReturnType) => void): void;
+        /**
+         * Returns all let, const and class variables from global scope.
+         */
+        post(
+            method: "Runtime.globalLexicalScopeNames",
+            params?: Runtime.GlobalLexicalScopeNamesParameterType,
+            callback?: (err: Error | null, params: Runtime.GlobalLexicalScopeNamesReturnType) => void
+        ): void;
+        post(method: "Runtime.globalLexicalScopeNames", callback?: (err: Error | null, params: Runtime.GlobalLexicalScopeNamesReturnType) => void): void;
+        /**
+         * Enables debugger for the given page. Clients should not assume that the debugging has been enabled until the result for this command is received.
+         */
+        post(method: "Debugger.enable", callback?: (err: Error | null, params: Debugger.EnableReturnType) => void): void;
+        /**
+         * Disables debugger for given page.
+         */
+        post(method: "Debugger.disable", callback?: (err: Error | null) => void): void;
+        /**
+         * Activates / deactivates all breakpoints on the page.
+         */
+        post(method: "Debugger.setBreakpointsActive", params?: Debugger.SetBreakpointsActiveParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.setBreakpointsActive", callback?: (err: Error | null) => void): void;
+        /**
+         * Makes page not interrupt on any pauses (breakpoint, exception, dom exception etc).
+         */
+        post(method: "Debugger.setSkipAllPauses", params?: Debugger.SetSkipAllPausesParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.setSkipAllPauses", callback?: (err: Error | null) => void): void;
+        /**
+         * Sets JavaScript breakpoint at given location specified either by URL or URL regex. Once this command is issued, all existing parsed scripts will have breakpoints resolved and returned in <code>locations</code> property. Further matching script parsing will result in subsequent <code>breakpointResolved</code> events issued. This logical breakpoint will survive page reloads.
+         */
+        post(method: "Debugger.setBreakpointByUrl", params?: Debugger.SetBreakpointByUrlParameterType, callback?: (err: Error | null, params: Debugger.SetBreakpointByUrlReturnType) => void): void;
+        post(method: "Debugger.setBreakpointByUrl", callback?: (err: Error | null, params: Debugger.SetBreakpointByUrlReturnType) => void): void;
+        /**
+         * Sets JavaScript breakpoint at a given location.
+         */
+        post(method: "Debugger.setBreakpoint", params?: Debugger.SetBreakpointParameterType, callback?: (err: Error | null, params: Debugger.SetBreakpointReturnType) => void): void;
+        post(method: "Debugger.setBreakpoint", callback?: (err: Error | null, params: Debugger.SetBreakpointReturnType) => void): void;
+        /**
+         * Removes JavaScript breakpoint.
+         */
+        post(method: "Debugger.removeBreakpoint", params?: Debugger.RemoveBreakpointParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.removeBreakpoint", callback?: (err: Error | null) => void): void;
+        /**
+         * Returns possible locations for breakpoint. scriptId in start and end range locations should be the same.
+         */
+        post(
+            method: "Debugger.getPossibleBreakpoints",
+            params?: Debugger.GetPossibleBreakpointsParameterType,
+            callback?: (err: Error | null, params: Debugger.GetPossibleBreakpointsReturnType) => void
+        ): void;
+        post(method: "Debugger.getPossibleBreakpoints", callback?: (err: Error | null, params: Debugger.GetPossibleBreakpointsReturnType) => void): void;
+        /**
+         * Continues execution until specific location is reached.
+         */
+        post(method: "Debugger.continueToLocation", params?: Debugger.ContinueToLocationParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.continueToLocation", callback?: (err: Error | null) => void): void;
+        /**
+         * @experimental
+         */
+        post(method: "Debugger.pauseOnAsyncCall", params?: Debugger.PauseOnAsyncCallParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.pauseOnAsyncCall", callback?: (err: Error | null) => void): void;
+        /**
+         * Steps over the statement.
+         */
+        post(method: "Debugger.stepOver", callback?: (err: Error | null) => void): void;
+        /**
+         * Steps into the function call.
+         */
+        post(method: "Debugger.stepInto", params?: Debugger.StepIntoParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.stepInto", callback?: (err: Error | null) => void): void;
+        /**
+         * Steps out of the function call.
+         */
+        post(method: "Debugger.stepOut", callback?: (err: Error | null) => void): void;
+        /**
+         * Stops on the next JavaScript statement.
+         */
+        post(method: "Debugger.pause", callback?: (err: Error | null) => void): void;
+        /**
+         * This method is deprecated - use Debugger.stepInto with breakOnAsyncCall and Debugger.pauseOnAsyncTask instead. Steps into next scheduled async task if any is scheduled before next pause. Returns success when async task is actually scheduled, returns error if no task were scheduled or another scheduleStepIntoAsync was called.
+         * @experimental
+         */
+        post(method: "Debugger.scheduleStepIntoAsync", callback?: (err: Error | null) => void): void;
+        /**
+         * Resumes JavaScript execution.
+         */
+        post(method: "Debugger.resume", callback?: (err: Error | null) => void): void;
+        /**
+         * Returns stack trace with given <code>stackTraceId</code>.
+         * @experimental
+         */
+        post(method: "Debugger.getStackTrace", params?: Debugger.GetStackTraceParameterType, callback?: (err: Error | null, params: Debugger.GetStackTraceReturnType) => void): void;
+        post(method: "Debugger.getStackTrace", callback?: (err: Error | null, params: Debugger.GetStackTraceReturnType) => void): void;
+        /**
+         * Searches for given string in script content.
+         */
+        post(method: "Debugger.searchInContent", params?: Debugger.SearchInContentParameterType, callback?: (err: Error | null, params: Debugger.SearchInContentReturnType) => void): void;
+        post(method: "Debugger.searchInContent", callback?: (err: Error | null, params: Debugger.SearchInContentReturnType) => void): void;
+        /**
+         * Edits JavaScript source live.
+         */
+        post(method: "Debugger.setScriptSource", params?: Debugger.SetScriptSourceParameterType, callback?: (err: Error | null, params: Debugger.SetScriptSourceReturnType) => void): void;
+        post(method: "Debugger.setScriptSource", callback?: (err: Error | null, params: Debugger.SetScriptSourceReturnType) => void): void;
+        /**
+         * Restarts particular call frame from the beginning.
+         */
+        post(method: "Debugger.restartFrame", params?: Debugger.RestartFrameParameterType, callback?: (err: Error | null, params: Debugger.RestartFrameReturnType) => void): void;
+        post(method: "Debugger.restartFrame", callback?: (err: Error | null, params: Debugger.RestartFrameReturnType) => void): void;
+        /**
+         * Returns source for the script with given id.
+         */
+        post(method: "Debugger.getScriptSource", params?: Debugger.GetScriptSourceParameterType, callback?: (err: Error | null, params: Debugger.GetScriptSourceReturnType) => void): void;
+        post(method: "Debugger.getScriptSource", callback?: (err: Error | null, params: Debugger.GetScriptSourceReturnType) => void): void;
+        /**
+         * Defines pause on exceptions state. Can be set to stop on all exceptions, uncaught exceptions or no exceptions. Initial pause on exceptions state is <code>none</code>.
+         */
+        post(method: "Debugger.setPauseOnExceptions", params?: Debugger.SetPauseOnExceptionsParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.setPauseOnExceptions", callback?: (err: Error | null) => void): void;
+        /**
+         * Evaluates expression on a given call frame.
+         */
+        post(method: "Debugger.evaluateOnCallFrame", params?: Debugger.EvaluateOnCallFrameParameterType, callback?: (err: Error | null, params: Debugger.EvaluateOnCallFrameReturnType) => void): void;
+        post(method: "Debugger.evaluateOnCallFrame", callback?: (err: Error | null, params: Debugger.EvaluateOnCallFrameReturnType) => void): void;
+        /**
+         * Changes value of variable in a callframe. Object-based scopes are not supported and must be mutated manually.
+         */
+        post(method: "Debugger.setVariableValue", params?: Debugger.SetVariableValueParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.setVariableValue", callback?: (err: Error | null) => void): void;
+        /**
+         * Changes return value in top frame. Available only at return break position.
+         * @experimental
+         */
+        post(method: "Debugger.setReturnValue", params?: Debugger.SetReturnValueParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.setReturnValue", callback?: (err: Error | null) => void): void;
+        /**
+         * Enables or disables async call stacks tracking.
+         */
+        post(method: "Debugger.setAsyncCallStackDepth", params?: Debugger.SetAsyncCallStackDepthParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.setAsyncCallStackDepth", callback?: (err: Error | null) => void): void;
+        /**
+         * Replace previous blackbox patterns with passed ones. Forces backend to skip stepping/pausing in scripts with url matching one of the patterns. VM will try to leave blackboxed script by performing 'step in' several times, finally resorting to 'step out' if unsuccessful.
+         * @experimental
+         */
+        post(method: "Debugger.setBlackboxPatterns", params?: Debugger.SetBlackboxPatternsParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.setBlackboxPatterns", callback?: (err: Error | null) => void): void;
+        /**
+         * Makes backend skip steps in the script in blackboxed ranges. VM will try leave blacklisted scripts by performing 'step in' several times, finally resorting to 'step out' if unsuccessful. Positions array contains positions where blackbox state is changed. First interval isn't blackboxed. Array should be sorted.
+         * @experimental
+         */
+        post(method: "Debugger.setBlackboxedRanges", params?: Debugger.SetBlackboxedRangesParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Debugger.setBlackboxedRanges", callback?: (err: Error | null) => void): void;
+        /**
+         * Enables console domain, sends the messages collected so far to the client by means of the <code>messageAdded</code> notification.
+         */
+        post(method: "Console.enable", callback?: (err: Error | null) => void): void;
+        /**
+         * Disables console domain, prevents further console messages from being reported to the client.
+         */
+        post(method: "Console.disable", callback?: (err: Error | null) => void): void;
+        /**
+         * Does nothing.
+         */
+        post(method: "Console.clearMessages", callback?: (err: Error | null) => void): void;
+        post(method: "Profiler.enable", callback?: (err: Error | null) => void): void;
+        post(method: "Profiler.disable", callback?: (err: Error | null) => void): void;
+        /**
+         * Changes CPU profiler sampling interval. Must be called before CPU profiles recording started.
+         */
+        post(method: "Profiler.setSamplingInterval", params?: Profiler.SetSamplingIntervalParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Profiler.setSamplingInterval", callback?: (err: Error | null) => void): void;
+        post(method: "Profiler.start", callback?: (err: Error | null) => void): void;
+        post(method: "Profiler.stop", callback?: (err: Error | null, params: Profiler.StopReturnType) => void): void;
+        /**
+         * Enable precise code coverage. Coverage data for JavaScript executed before enabling precise code coverage may be incomplete. Enabling prevents running optimized code and resets execution counters.
+         */
+        post(method: "Profiler.startPreciseCoverage", params?: Profiler.StartPreciseCoverageParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Profiler.startPreciseCoverage", callback?: (err: Error | null) => void): void;
+        /**
+         * Disable precise code coverage. Disabling releases unnecessary execution count records and allows executing optimized code.
+         */
+        post(method: "Profiler.stopPreciseCoverage", callback?: (err: Error | null) => void): void;
+        /**
+         * Collect coverage data for the current isolate, and resets execution counters. Precise code coverage needs to have started.
+         */
+        post(method: "Profiler.takePreciseCoverage", callback?: (err: Error | null, params: Profiler.TakePreciseCoverageReturnType) => void): void;
+        /**
+         * Collect coverage data for the current isolate. The coverage data may be incomplete due to garbage collection.
+         */
+        post(method: "Profiler.getBestEffortCoverage", callback?: (err: Error | null, params: Profiler.GetBestEffortCoverageReturnType) => void): void;
+        post(method: "HeapProfiler.enable", callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.disable", callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.startTrackingHeapObjects", params?: HeapProfiler.StartTrackingHeapObjectsParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.startTrackingHeapObjects", callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.stopTrackingHeapObjects", params?: HeapProfiler.StopTrackingHeapObjectsParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.stopTrackingHeapObjects", callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.takeHeapSnapshot", params?: HeapProfiler.TakeHeapSnapshotParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.takeHeapSnapshot", callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.collectGarbage", callback?: (err: Error | null) => void): void;
+        post(
+            method: "HeapProfiler.getObjectByHeapObjectId",
+            params?: HeapProfiler.GetObjectByHeapObjectIdParameterType,
+            callback?: (err: Error | null, params: HeapProfiler.GetObjectByHeapObjectIdReturnType) => void
+        ): void;
+        post(method: "HeapProfiler.getObjectByHeapObjectId", callback?: (err: Error | null, params: HeapProfiler.GetObjectByHeapObjectIdReturnType) => void): void;
+        /**
+         * Enables console to refer to the node with given id via $x (see Command Line API for more details $x functions).
+         */
+        post(method: "HeapProfiler.addInspectedHeapObject", params?: HeapProfiler.AddInspectedHeapObjectParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.addInspectedHeapObject", callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.getHeapObjectId", params?: HeapProfiler.GetHeapObjectIdParameterType, callback?: (err: Error | null, params: HeapProfiler.GetHeapObjectIdReturnType) => void): void;
+        post(method: "HeapProfiler.getHeapObjectId", callback?: (err: Error | null, params: HeapProfiler.GetHeapObjectIdReturnType) => void): void;
+        post(method: "HeapProfiler.startSampling", params?: HeapProfiler.StartSamplingParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.startSampling", callback?: (err: Error | null) => void): void;
+        post(method: "HeapProfiler.stopSampling", callback?: (err: Error | null, params: HeapProfiler.StopSamplingReturnType) => void): void;
+        post(method: "HeapProfiler.getSamplingProfile", callback?: (err: Error | null, params: HeapProfiler.GetSamplingProfileReturnType) => void): void;
+        /**
+         * Read a chunk of the stream
+         */
+        post(method: "IO.read", params?: IO.ReadParameterType, callback?: (err: Error | null, params: IO.ReadReturnType) => void): void;
+        post(method: "IO.read", callback?: (err: Error | null, params: IO.ReadReturnType) => void): void;
+        post(method: "IO.close", params?: IO.CloseParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "IO.close", callback?: (err: Error | null) => void): void;
+        /**
+         * Disables network tracking, prevents network events from being sent to the client.
+         */
+        post(method: "Network.disable", callback?: (err: Error | null) => void): void;
+        /**
+         * Enables network tracking, network events will now be delivered to the client.
+         */
+        post(method: "Network.enable", params?: Network.EnableParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Network.enable", callback?: (err: Error | null) => void): void;
+        /**
+         * Returns post data sent with the request. Returns an error when no data was sent with the request.
+         */
+        post(method: "Network.getRequestPostData", params?: Network.GetRequestPostDataParameterType, callback?: (err: Error | null, params: Network.GetRequestPostDataReturnType) => void): void;
+        post(method: "Network.getRequestPostData", callback?: (err: Error | null, params: Network.GetRequestPostDataReturnType) => void): void;
+        /**
+         * Returns content served for the given request.
+         */
+        post(method: "Network.getResponseBody", params?: Network.GetResponseBodyParameterType, callback?: (err: Error | null, params: Network.GetResponseBodyReturnType) => void): void;
+        post(method: "Network.getResponseBody", callback?: (err: Error | null, params: Network.GetResponseBodyReturnType) => void): void;
+        /**
+         * Enables streaming of the response for the given requestId.
+         * If enabled, the dataReceived event contains the data that was received during streaming.
+         * @experimental
+         */
+        post(
+            method: "Network.streamResourceContent",
+            params?: Network.StreamResourceContentParameterType,
+            callback?: (err: Error | null, params: Network.StreamResourceContentReturnType) => void
+        ): void;
+        post(method: "Network.streamResourceContent", callback?: (err: Error | null, params: Network.StreamResourceContentReturnType) => void): void;
+        /**
+         * Fetches the resource and returns the content.
+         */
+        post(method: "Network.loadNetworkResource", params?: Network.LoadNetworkResourceParameterType, callback?: (err: Error | null, params: Network.LoadNetworkResourceReturnType) => void): void;
+        post(method: "Network.loadNetworkResource", callback?: (err: Error | null, params: Network.LoadNetworkResourceReturnType) => void): void;
+        /**
+         * Enable the NodeRuntime events except by `NodeRuntime.waitingForDisconnect`.
+         */
+        post(method: "NodeRuntime.enable", callback?: (err: Error | null) => void): void;
+        /**
+         * Disable NodeRuntime events
+         */
+        post(method: "NodeRuntime.disable", callback?: (err: Error | null) => void): void;
+        /**
+         * Enable the `NodeRuntime.waitingForDisconnect`.
+         */
+        post(method: "NodeRuntime.notifyWhenWaitingForDisconnect", params?: NodeRuntime.NotifyWhenWaitingForDisconnectParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "NodeRuntime.notifyWhenWaitingForDisconnect", callback?: (err: Error | null) => void): void;
+        /**
+         * Gets supported tracing categories.
+         */
+        post(method: "NodeTracing.getCategories", callback?: (err: Error | null, params: NodeTracing.GetCategoriesReturnType) => void): void;
+        /**
+         * Start trace events collection.
+         */
+        post(method: "NodeTracing.start", params?: NodeTracing.StartParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "NodeTracing.start", callback?: (err: Error | null) => void): void;
+        /**
+         * Stop trace events collection. Remaining collected events will be sent as a sequence of
+         * dataCollected events followed by tracingComplete event.
+         */
+        post(method: "NodeTracing.stop", callback?: (err: Error | null) => void): void;
+        /**
+         * Sends protocol message over session with given id.
+         */
+        post(method: "NodeWorker.sendMessageToWorker", params?: NodeWorker.SendMessageToWorkerParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "NodeWorker.sendMessageToWorker", callback?: (err: Error | null) => void): void;
+        /**
+         * Instructs the inspector to attach to running workers. Will also attach to new workers
+         * as they start
+         */
+        post(method: "NodeWorker.enable", params?: NodeWorker.EnableParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "NodeWorker.enable", callback?: (err: Error | null) => void): void;
+        /**
+         * Detaches from all running workers and disables attaching to new workers as they are started.
+         */
+        post(method: "NodeWorker.disable", callback?: (err: Error | null) => void): void;
+        /**
+         * Detached from the worker with given sessionId.
+         */
+        post(method: "NodeWorker.detach", params?: NodeWorker.DetachParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "NodeWorker.detach", callback?: (err: Error | null) => void): void;
+        post(method: "Target.setAutoAttach", params?: Target.SetAutoAttachParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "Target.setAutoAttach", callback?: (err: Error | null) => void): void;
+        post(method: "DOMStorage.clear", params?: DOMStorage.ClearParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "DOMStorage.clear", callback?: (err: Error | null) => void): void;
+        /**
+         * Disables storage tracking, prevents storage events from being sent to the client.
+         */
+        post(method: "DOMStorage.disable", callback?: (err: Error | null) => void): void;
+        /**
+         * Enables storage tracking, storage events will now be delivered to the client.
+         */
+        post(method: "DOMStorage.enable", callback?: (err: Error | null) => void): void;
+        post(
+            method: "DOMStorage.getDOMStorageItems",
+            params?: DOMStorage.GetDOMStorageItemsParameterType,
+            callback?: (err: Error | null, params: DOMStorage.GetDOMStorageItemsReturnType) => void
+        ): void;
+        post(method: "DOMStorage.getDOMStorageItems", callback?: (err: Error | null, params: DOMStorage.GetDOMStorageItemsReturnType) => void): void;
+        post(method: "DOMStorage.removeDOMStorageItem", params?: DOMStorage.RemoveDOMStorageItemParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "DOMStorage.removeDOMStorageItem", callback?: (err: Error | null) => void): void;
+        post(method: "DOMStorage.setDOMStorageItem", params?: DOMStorage.SetDOMStorageItemParameterType, callback?: (err: Error | null) => void): void;
+        post(method: "DOMStorage.setDOMStorageItem", callback?: (err: Error | null) => void): void;
+        /**
+         * @experimental
+         */
+        post(method: "Storage.getStorageKey", params?: Storage.GetStorageKeyParameterType, callback?: (err: Error | null, params: Storage.GetStorageKeyReturnType) => void): void;
+        post(method: "Storage.getStorageKey", callback?: (err: Error | null, params: Storage.GetStorageKeyReturnType) => void): void;
+        addListener(event: string, listener: (...args: any[]) => void): this;
+        /**
+         * Emitted when any notification from the V8 Inspector is received.
+         */
+        addListener(event: "inspectorNotification", listener: (message: InspectorNotification<object>) => void): this;
+        /**
+         * Issued when new execution context is created.
+         */
+        addListener(event: "Runtime.executionContextCreated", listener: (message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>) => void): this;
+        /**
+         * Issued when execution context is destroyed.
+         */
+        addListener(event: "Runtime.executionContextDestroyed", listener: (message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>) => void): this;
+        /**
+         * Issued when all executionContexts were cleared in browser
+         */
+        addListener(event: "Runtime.executionContextsCleared", listener: () => void): this;
+        /**
+         * Issued when exception was thrown and unhandled.
+         */
+        addListener(event: "Runtime.exceptionThrown", listener: (message: InspectorNotification<Runtime.ExceptionThrownEventDataType>) => void): this;
+        /**
+         * Issued when unhandled exception was revoked.
+         */
+        addListener(event: "Runtime.exceptionRevoked", listener: (message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>) => void): this;
+        /**
+         * Issued when console API was called.
+         */
+        addListener(event: "Runtime.consoleAPICalled", listener: (message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>) => void): this;
+        /**
+         * Issued when object should be inspected (for example, as a result of inspect() command line API call).
+         */
+        addListener(event: "Runtime.inspectRequested", listener: (message: InspectorNotification<Runtime.InspectRequestedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger.
+         */
+        addListener(event: "Debugger.scriptParsed", listener: (message: InspectorNotification<Debugger.ScriptParsedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine fails to parse the script.
+         */
+        addListener(event: "Debugger.scriptFailedToParse", listener: (message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>) => void): this;
+        /**
+         * Fired when breakpoint is resolved to an actual script and location.
+         */
+        addListener(event: "Debugger.breakpointResolved", listener: (message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
+         */
+        addListener(event: "Debugger.paused", listener: (message: InspectorNotification<Debugger.PausedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine resumed execution.
+         */
+        addListener(event: "Debugger.resumed", listener: () => void): this;
+        /**
+         * Issued when new console message is added.
+         */
+        addListener(event: "Console.messageAdded", listener: (message: InspectorNotification<Console.MessageAddedEventDataType>) => void): this;
+        /**
+         * Sent when new profile recording is started using console.profile() call.
+         */
+        addListener(event: "Profiler.consoleProfileStarted", listener: (message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>) => void): this;
+        addListener(event: "Profiler.consoleProfileFinished", listener: (message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>) => void): this;
+        addListener(event: "HeapProfiler.addHeapSnapshotChunk", listener: (message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>) => void): this;
+        addListener(event: "HeapProfiler.resetProfiles", listener: () => void): this;
+        addListener(event: "HeapProfiler.reportHeapSnapshotProgress", listener: (message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend regularly sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
+         */
+        addListener(event: "HeapProfiler.lastSeenObjectId", listener: (message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend may send update for one or more fragments
+         */
+        addListener(event: "HeapProfiler.heapStatsUpdate", listener: (message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>) => void): this;
+        /**
+         * Fired when page is about to send HTTP request.
+         */
+        addListener(event: "Network.requestWillBeSent", listener: (message: InspectorNotification<Network.RequestWillBeSentEventDataType>) => void): this;
+        /**
+         * Fired when HTTP response is available.
+         */
+        addListener(event: "Network.responseReceived", listener: (message: InspectorNotification<Network.ResponseReceivedEventDataType>) => void): this;
+        addListener(event: "Network.loadingFailed", listener: (message: InspectorNotification<Network.LoadingFailedEventDataType>) => void): this;
+        addListener(event: "Network.loadingFinished", listener: (message: InspectorNotification<Network.LoadingFinishedEventDataType>) => void): this;
+        /**
+         * Fired when data chunk was received over the network.
+         */
+        addListener(event: "Network.dataReceived", listener: (message: InspectorNotification<Network.DataReceivedEventDataType>) => void): this;
+        /**
+         * Fired upon WebSocket creation.
+         */
+        addListener(event: "Network.webSocketCreated", listener: (message: InspectorNotification<Network.WebSocketCreatedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket is closed.
+         */
+        addListener(event: "Network.webSocketClosed", listener: (message: InspectorNotification<Network.WebSocketClosedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket handshake response becomes available.
+         */
+        addListener(event: "Network.webSocketHandshakeResponseReceived", listener: (message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>) => void): this;
+        /**
+         * This event is fired instead of `Runtime.executionContextDestroyed` when
+         * enabled.
+         * It is fired when the Node process finished all code execution and is
+         * waiting for all frontends to disconnect.
+         */
+        addListener(event: "NodeRuntime.waitingForDisconnect", listener: () => void): this;
+        /**
+         * This event is fired when the runtime is waiting for the debugger. For
+         * example, when inspector.waitingForDebugger is called
+         */
+        addListener(event: "NodeRuntime.waitingForDebugger", listener: () => void): this;
+        /**
+         * Contains an bucket of collected trace events.
+         */
+        addListener(event: "NodeTracing.dataCollected", listener: (message: InspectorNotification<NodeTracing.DataCollectedEventDataType>) => void): this;
+        /**
+         * Signals that tracing is stopped and there is no trace buffers pending flush, all data were
+         * delivered via dataCollected events.
+         */
+        addListener(event: "NodeTracing.tracingComplete", listener: () => void): this;
+        /**
+         * Issued when attached to a worker.
+         */
+        addListener(event: "NodeWorker.attachedToWorker", listener: (message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>) => void): this;
+        /**
+         * Issued when detached from the worker.
+         */
+        addListener(event: "NodeWorker.detachedFromWorker", listener: (message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>) => void): this;
+        /**
+         * Notifies about a new protocol message received from the session
+         * (session ID is provided in attachedToWorker notification).
+         */
+        addListener(event: "NodeWorker.receivedMessageFromWorker", listener: (message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>) => void): this;
+        addListener(event: "Target.targetCreated", listener: (message: InspectorNotification<Target.TargetCreatedEventDataType>) => void): this;
+        addListener(event: "Target.attachedToTarget", listener: (message: InspectorNotification<Target.AttachedToTargetEventDataType>) => void): this;
+        addListener(event: "DOMStorage.domStorageItemAdded", listener: (message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>) => void): this;
+        addListener(event: "DOMStorage.domStorageItemRemoved", listener: (message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>) => void): this;
+        addListener(event: "DOMStorage.domStorageItemUpdated", listener: (message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>) => void): this;
+        addListener(event: "DOMStorage.domStorageItemsCleared", listener: (message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>) => void): this;
+        emit(event: string | symbol, ...args: any[]): boolean;
+        emit(event: "inspectorNotification", message: InspectorNotification<object>): boolean;
+        emit(event: "Runtime.executionContextCreated", message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>): boolean;
+        emit(event: "Runtime.executionContextDestroyed", message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>): boolean;
+        emit(event: "Runtime.executionContextsCleared"): boolean;
+        emit(event: "Runtime.exceptionThrown", message: InspectorNotification<Runtime.ExceptionThrownEventDataType>): boolean;
+        emit(event: "Runtime.exceptionRevoked", message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>): boolean;
+        emit(event: "Runtime.consoleAPICalled", message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>): boolean;
+        emit(event: "Runtime.inspectRequested", message: InspectorNotification<Runtime.InspectRequestedEventDataType>): boolean;
+        emit(event: "Debugger.scriptParsed", message: InspectorNotification<Debugger.ScriptParsedEventDataType>): boolean;
+        emit(event: "Debugger.scriptFailedToParse", message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>): boolean;
+        emit(event: "Debugger.breakpointResolved", message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>): boolean;
+        emit(event: "Debugger.paused", message: InspectorNotification<Debugger.PausedEventDataType>): boolean;
+        emit(event: "Debugger.resumed"): boolean;
+        emit(event: "Console.messageAdded", message: InspectorNotification<Console.MessageAddedEventDataType>): boolean;
+        emit(event: "Profiler.consoleProfileStarted", message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>): boolean;
+        emit(event: "Profiler.consoleProfileFinished", message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>): boolean;
+        emit(event: "HeapProfiler.addHeapSnapshotChunk", message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>): boolean;
+        emit(event: "HeapProfiler.resetProfiles"): boolean;
+        emit(event: "HeapProfiler.reportHeapSnapshotProgress", message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>): boolean;
+        emit(event: "HeapProfiler.lastSeenObjectId", message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>): boolean;
+        emit(event: "HeapProfiler.heapStatsUpdate", message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>): boolean;
+        emit(event: "Network.requestWillBeSent", message: InspectorNotification<Network.RequestWillBeSentEventDataType>): boolean;
+        emit(event: "Network.responseReceived", message: InspectorNotification<Network.ResponseReceivedEventDataType>): boolean;
+        emit(event: "Network.loadingFailed", message: InspectorNotification<Network.LoadingFailedEventDataType>): boolean;
+        emit(event: "Network.loadingFinished", message: InspectorNotification<Network.LoadingFinishedEventDataType>): boolean;
+        emit(event: "Network.dataReceived", message: InspectorNotification<Network.DataReceivedEventDataType>): boolean;
+        emit(event: "Network.webSocketCreated", message: InspectorNotification<Network.WebSocketCreatedEventDataType>): boolean;
+        emit(event: "Network.webSocketClosed", message: InspectorNotification<Network.WebSocketClosedEventDataType>): boolean;
+        emit(event: "Network.webSocketHandshakeResponseReceived", message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>): boolean;
+        emit(event: "NodeRuntime.waitingForDisconnect"): boolean;
+        emit(event: "NodeRuntime.waitingForDebugger"): boolean;
+        emit(event: "NodeTracing.dataCollected", message: InspectorNotification<NodeTracing.DataCollectedEventDataType>): boolean;
+        emit(event: "NodeTracing.tracingComplete"): boolean;
+        emit(event: "NodeWorker.attachedToWorker", message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>): boolean;
+        emit(event: "NodeWorker.detachedFromWorker", message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>): boolean;
+        emit(event: "NodeWorker.receivedMessageFromWorker", message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>): boolean;
+        emit(event: "Target.targetCreated", message: InspectorNotification<Target.TargetCreatedEventDataType>): boolean;
+        emit(event: "Target.attachedToTarget", message: InspectorNotification<Target.AttachedToTargetEventDataType>): boolean;
+        emit(event: "DOMStorage.domStorageItemAdded", message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>): boolean;
+        emit(event: "DOMStorage.domStorageItemRemoved", message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>): boolean;
+        emit(event: "DOMStorage.domStorageItemUpdated", message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>): boolean;
+        emit(event: "DOMStorage.domStorageItemsCleared", message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>): boolean;
+        on(event: string, listener: (...args: any[]) => void): this;
+        /**
+         * Emitted when any notification from the V8 Inspector is received.
+         */
+        on(event: "inspectorNotification", listener: (message: InspectorNotification<object>) => void): this;
+        /**
+         * Issued when new execution context is created.
+         */
+        on(event: "Runtime.executionContextCreated", listener: (message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>) => void): this;
+        /**
+         * Issued when execution context is destroyed.
+         */
+        on(event: "Runtime.executionContextDestroyed", listener: (message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>) => void): this;
+        /**
+         * Issued when all executionContexts were cleared in browser
+         */
+        on(event: "Runtime.executionContextsCleared", listener: () => void): this;
+        /**
+         * Issued when exception was thrown and unhandled.
+         */
+        on(event: "Runtime.exceptionThrown", listener: (message: InspectorNotification<Runtime.ExceptionThrownEventDataType>) => void): this;
+        /**
+         * Issued when unhandled exception was revoked.
+         */
+        on(event: "Runtime.exceptionRevoked", listener: (message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>) => void): this;
+        /**
+         * Issued when console API was called.
+         */
+        on(event: "Runtime.consoleAPICalled", listener: (message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>) => void): this;
+        /**
+         * Issued when object should be inspected (for example, as a result of inspect() command line API call).
+         */
+        on(event: "Runtime.inspectRequested", listener: (message: InspectorNotification<Runtime.InspectRequestedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger.
+         */
+        on(event: "Debugger.scriptParsed", listener: (message: InspectorNotification<Debugger.ScriptParsedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine fails to parse the script.
+         */
+        on(event: "Debugger.scriptFailedToParse", listener: (message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>) => void): this;
+        /**
+         * Fired when breakpoint is resolved to an actual script and location.
+         */
+        on(event: "Debugger.breakpointResolved", listener: (message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
+         */
+        on(event: "Debugger.paused", listener: (message: InspectorNotification<Debugger.PausedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine resumed execution.
+         */
+        on(event: "Debugger.resumed", listener: () => void): this;
+        /**
+         * Issued when new console message is added.
+         */
+        on(event: "Console.messageAdded", listener: (message: InspectorNotification<Console.MessageAddedEventDataType>) => void): this;
+        /**
+         * Sent when new profile recording is started using console.profile() call.
+         */
+        on(event: "Profiler.consoleProfileStarted", listener: (message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>) => void): this;
+        on(event: "Profiler.consoleProfileFinished", listener: (message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>) => void): this;
+        on(event: "HeapProfiler.addHeapSnapshotChunk", listener: (message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>) => void): this;
+        on(event: "HeapProfiler.resetProfiles", listener: () => void): this;
+        on(event: "HeapProfiler.reportHeapSnapshotProgress", listener: (message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend regularly sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
+         */
+        on(event: "HeapProfiler.lastSeenObjectId", listener: (message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend may send update for one or more fragments
+         */
+        on(event: "HeapProfiler.heapStatsUpdate", listener: (message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>) => void): this;
+        /**
+         * Fired when page is about to send HTTP request.
+         */
+        on(event: "Network.requestWillBeSent", listener: (message: InspectorNotification<Network.RequestWillBeSentEventDataType>) => void): this;
+        /**
+         * Fired when HTTP response is available.
+         */
+        on(event: "Network.responseReceived", listener: (message: InspectorNotification<Network.ResponseReceivedEventDataType>) => void): this;
+        on(event: "Network.loadingFailed", listener: (message: InspectorNotification<Network.LoadingFailedEventDataType>) => void): this;
+        on(event: "Network.loadingFinished", listener: (message: InspectorNotification<Network.LoadingFinishedEventDataType>) => void): this;
+        /**
+         * Fired when data chunk was received over the network.
+         */
+        on(event: "Network.dataReceived", listener: (message: InspectorNotification<Network.DataReceivedEventDataType>) => void): this;
+        /**
+         * Fired upon WebSocket creation.
+         */
+        on(event: "Network.webSocketCreated", listener: (message: InspectorNotification<Network.WebSocketCreatedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket is closed.
+         */
+        on(event: "Network.webSocketClosed", listener: (message: InspectorNotification<Network.WebSocketClosedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket handshake response becomes available.
+         */
+        on(event: "Network.webSocketHandshakeResponseReceived", listener: (message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>) => void): this;
+        /**
+         * This event is fired instead of `Runtime.executionContextDestroyed` when
+         * enabled.
+         * It is fired when the Node process finished all code execution and is
+         * waiting for all frontends to disconnect.
+         */
+        on(event: "NodeRuntime.waitingForDisconnect", listener: () => void): this;
+        /**
+         * This event is fired when the runtime is waiting for the debugger. For
+         * example, when inspector.waitingForDebugger is called
+         */
+        on(event: "NodeRuntime.waitingForDebugger", listener: () => void): this;
+        /**
+         * Contains an bucket of collected trace events.
+         */
+        on(event: "NodeTracing.dataCollected", listener: (message: InspectorNotification<NodeTracing.DataCollectedEventDataType>) => void): this;
+        /**
+         * Signals that tracing is stopped and there is no trace buffers pending flush, all data were
+         * delivered via dataCollected events.
+         */
+        on(event: "NodeTracing.tracingComplete", listener: () => void): this;
+        /**
+         * Issued when attached to a worker.
+         */
+        on(event: "NodeWorker.attachedToWorker", listener: (message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>) => void): this;
+        /**
+         * Issued when detached from the worker.
+         */
+        on(event: "NodeWorker.detachedFromWorker", listener: (message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>) => void): this;
+        /**
+         * Notifies about a new protocol message received from the session
+         * (session ID is provided in attachedToWorker notification).
+         */
+        on(event: "NodeWorker.receivedMessageFromWorker", listener: (message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>) => void): this;
+        on(event: "Target.targetCreated", listener: (message: InspectorNotification<Target.TargetCreatedEventDataType>) => void): this;
+        on(event: "Target.attachedToTarget", listener: (message: InspectorNotification<Target.AttachedToTargetEventDataType>) => void): this;
+        on(event: "DOMStorage.domStorageItemAdded", listener: (message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>) => void): this;
+        on(event: "DOMStorage.domStorageItemRemoved", listener: (message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>) => void): this;
+        on(event: "DOMStorage.domStorageItemUpdated", listener: (message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>) => void): this;
+        on(event: "DOMStorage.domStorageItemsCleared", listener: (message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>) => void): this;
+        once(event: string, listener: (...args: any[]) => void): this;
+        /**
+         * Emitted when any notification from the V8 Inspector is received.
+         */
+        once(event: "inspectorNotification", listener: (message: InspectorNotification<object>) => void): this;
+        /**
+         * Issued when new execution context is created.
+         */
+        once(event: "Runtime.executionContextCreated", listener: (message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>) => void): this;
+        /**
+         * Issued when execution context is destroyed.
+         */
+        once(event: "Runtime.executionContextDestroyed", listener: (message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>) => void): this;
+        /**
+         * Issued when all executionContexts were cleared in browser
+         */
+        once(event: "Runtime.executionContextsCleared", listener: () => void): this;
+        /**
+         * Issued when exception was thrown and unhandled.
+         */
+        once(event: "Runtime.exceptionThrown", listener: (message: InspectorNotification<Runtime.ExceptionThrownEventDataType>) => void): this;
+        /**
+         * Issued when unhandled exception was revoked.
+         */
+        once(event: "Runtime.exceptionRevoked", listener: (message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>) => void): this;
+        /**
+         * Issued when console API was called.
+         */
+        once(event: "Runtime.consoleAPICalled", listener: (message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>) => void): this;
+        /**
+         * Issued when object should be inspected (for example, as a result of inspect() command line API call).
+         */
+        once(event: "Runtime.inspectRequested", listener: (message: InspectorNotification<Runtime.InspectRequestedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger.
+         */
+        once(event: "Debugger.scriptParsed", listener: (message: InspectorNotification<Debugger.ScriptParsedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine fails to parse the script.
+         */
+        once(event: "Debugger.scriptFailedToParse", listener: (message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>) => void): this;
+        /**
+         * Fired when breakpoint is resolved to an actual script and location.
+         */
+        once(event: "Debugger.breakpointResolved", listener: (message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
+         */
+        once(event: "Debugger.paused", listener: (message: InspectorNotification<Debugger.PausedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine resumed execution.
+         */
+        once(event: "Debugger.resumed", listener: () => void): this;
+        /**
+         * Issued when new console message is added.
+         */
+        once(event: "Console.messageAdded", listener: (message: InspectorNotification<Console.MessageAddedEventDataType>) => void): this;
+        /**
+         * Sent when new profile recording is started using console.profile() call.
+         */
+        once(event: "Profiler.consoleProfileStarted", listener: (message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>) => void): this;
+        once(event: "Profiler.consoleProfileFinished", listener: (message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>) => void): this;
+        once(event: "HeapProfiler.addHeapSnapshotChunk", listener: (message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>) => void): this;
+        once(event: "HeapProfiler.resetProfiles", listener: () => void): this;
+        once(event: "HeapProfiler.reportHeapSnapshotProgress", listener: (message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend regularly sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
+         */
+        once(event: "HeapProfiler.lastSeenObjectId", listener: (message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend may send update for one or more fragments
+         */
+        once(event: "HeapProfiler.heapStatsUpdate", listener: (message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>) => void): this;
+        /**
+         * Fired when page is about to send HTTP request.
+         */
+        once(event: "Network.requestWillBeSent", listener: (message: InspectorNotification<Network.RequestWillBeSentEventDataType>) => void): this;
+        /**
+         * Fired when HTTP response is available.
+         */
+        once(event: "Network.responseReceived", listener: (message: InspectorNotification<Network.ResponseReceivedEventDataType>) => void): this;
+        once(event: "Network.loadingFailed", listener: (message: InspectorNotification<Network.LoadingFailedEventDataType>) => void): this;
+        once(event: "Network.loadingFinished", listener: (message: InspectorNotification<Network.LoadingFinishedEventDataType>) => void): this;
+        /**
+         * Fired when data chunk was received over the network.
+         */
+        once(event: "Network.dataReceived", listener: (message: InspectorNotification<Network.DataReceivedEventDataType>) => void): this;
+        /**
+         * Fired upon WebSocket creation.
+         */
+        once(event: "Network.webSocketCreated", listener: (message: InspectorNotification<Network.WebSocketCreatedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket is closed.
+         */
+        once(event: "Network.webSocketClosed", listener: (message: InspectorNotification<Network.WebSocketClosedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket handshake response becomes available.
+         */
+        once(event: "Network.webSocketHandshakeResponseReceived", listener: (message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>) => void): this;
+        /**
+         * This event is fired instead of `Runtime.executionContextDestroyed` when
+         * enabled.
+         * It is fired when the Node process finished all code execution and is
+         * waiting for all frontends to disconnect.
+         */
+        once(event: "NodeRuntime.waitingForDisconnect", listener: () => void): this;
+        /**
+         * This event is fired when the runtime is waiting for the debugger. For
+         * example, when inspector.waitingForDebugger is called
+         */
+        once(event: "NodeRuntime.waitingForDebugger", listener: () => void): this;
+        /**
+         * Contains an bucket of collected trace events.
+         */
+        once(event: "NodeTracing.dataCollected", listener: (message: InspectorNotification<NodeTracing.DataCollectedEventDataType>) => void): this;
+        /**
+         * Signals that tracing is stopped and there is no trace buffers pending flush, all data were
+         * delivered via dataCollected events.
+         */
+        once(event: "NodeTracing.tracingComplete", listener: () => void): this;
+        /**
+         * Issued when attached to a worker.
+         */
+        once(event: "NodeWorker.attachedToWorker", listener: (message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>) => void): this;
+        /**
+         * Issued when detached from the worker.
+         */
+        once(event: "NodeWorker.detachedFromWorker", listener: (message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>) => void): this;
+        /**
+         * Notifies about a new protocol message received from the session
+         * (session ID is provided in attachedToWorker notification).
+         */
+        once(event: "NodeWorker.receivedMessageFromWorker", listener: (message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>) => void): this;
+        once(event: "Target.targetCreated", listener: (message: InspectorNotification<Target.TargetCreatedEventDataType>) => void): this;
+        once(event: "Target.attachedToTarget", listener: (message: InspectorNotification<Target.AttachedToTargetEventDataType>) => void): this;
+        once(event: "DOMStorage.domStorageItemAdded", listener: (message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>) => void): this;
+        once(event: "DOMStorage.domStorageItemRemoved", listener: (message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>) => void): this;
+        once(event: "DOMStorage.domStorageItemUpdated", listener: (message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>) => void): this;
+        once(event: "DOMStorage.domStorageItemsCleared", listener: (message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>) => void): this;
+        prependListener(event: string, listener: (...args: any[]) => void): this;
+        /**
+         * Emitted when any notification from the V8 Inspector is received.
+         */
+        prependListener(event: "inspectorNotification", listener: (message: InspectorNotification<object>) => void): this;
+        /**
+         * Issued when new execution context is created.
+         */
+        prependListener(event: "Runtime.executionContextCreated", listener: (message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>) => void): this;
+        /**
+         * Issued when execution context is destroyed.
+         */
+        prependListener(event: "Runtime.executionContextDestroyed", listener: (message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>) => void): this;
+        /**
+         * Issued when all executionContexts were cleared in browser
+         */
+        prependListener(event: "Runtime.executionContextsCleared", listener: () => void): this;
+        /**
+         * Issued when exception was thrown and unhandled.
+         */
+        prependListener(event: "Runtime.exceptionThrown", listener: (message: InspectorNotification<Runtime.ExceptionThrownEventDataType>) => void): this;
+        /**
+         * Issued when unhandled exception was revoked.
+         */
+        prependListener(event: "Runtime.exceptionRevoked", listener: (message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>) => void): this;
+        /**
+         * Issued when console API was called.
+         */
+        prependListener(event: "Runtime.consoleAPICalled", listener: (message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>) => void): this;
+        /**
+         * Issued when object should be inspected (for example, as a result of inspect() command line API call).
+         */
+        prependListener(event: "Runtime.inspectRequested", listener: (message: InspectorNotification<Runtime.InspectRequestedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger.
+         */
+        prependListener(event: "Debugger.scriptParsed", listener: (message: InspectorNotification<Debugger.ScriptParsedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine fails to parse the script.
+         */
+        prependListener(event: "Debugger.scriptFailedToParse", listener: (message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>) => void): this;
+        /**
+         * Fired when breakpoint is resolved to an actual script and location.
+         */
+        prependListener(event: "Debugger.breakpointResolved", listener: (message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
+         */
+        prependListener(event: "Debugger.paused", listener: (message: InspectorNotification<Debugger.PausedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine resumed execution.
+         */
+        prependListener(event: "Debugger.resumed", listener: () => void): this;
+        /**
+         * Issued when new console message is added.
+         */
+        prependListener(event: "Console.messageAdded", listener: (message: InspectorNotification<Console.MessageAddedEventDataType>) => void): this;
+        /**
+         * Sent when new profile recording is started using console.profile() call.
+         */
+        prependListener(event: "Profiler.consoleProfileStarted", listener: (message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>) => void): this;
+        prependListener(event: "Profiler.consoleProfileFinished", listener: (message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>) => void): this;
+        prependListener(event: "HeapProfiler.addHeapSnapshotChunk", listener: (message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>) => void): this;
+        prependListener(event: "HeapProfiler.resetProfiles", listener: () => void): this;
+        prependListener(event: "HeapProfiler.reportHeapSnapshotProgress", listener: (message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend regularly sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
+         */
+        prependListener(event: "HeapProfiler.lastSeenObjectId", listener: (message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend may send update for one or more fragments
+         */
+        prependListener(event: "HeapProfiler.heapStatsUpdate", listener: (message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>) => void): this;
+        /**
+         * Fired when page is about to send HTTP request.
+         */
+        prependListener(event: "Network.requestWillBeSent", listener: (message: InspectorNotification<Network.RequestWillBeSentEventDataType>) => void): this;
+        /**
+         * Fired when HTTP response is available.
+         */
+        prependListener(event: "Network.responseReceived", listener: (message: InspectorNotification<Network.ResponseReceivedEventDataType>) => void): this;
+        prependListener(event: "Network.loadingFailed", listener: (message: InspectorNotification<Network.LoadingFailedEventDataType>) => void): this;
+        prependListener(event: "Network.loadingFinished", listener: (message: InspectorNotification<Network.LoadingFinishedEventDataType>) => void): this;
+        /**
+         * Fired when data chunk was received over the network.
+         */
+        prependListener(event: "Network.dataReceived", listener: (message: InspectorNotification<Network.DataReceivedEventDataType>) => void): this;
+        /**
+         * Fired upon WebSocket creation.
+         */
+        prependListener(event: "Network.webSocketCreated", listener: (message: InspectorNotification<Network.WebSocketCreatedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket is closed.
+         */
+        prependListener(event: "Network.webSocketClosed", listener: (message: InspectorNotification<Network.WebSocketClosedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket handshake response becomes available.
+         */
+        prependListener(event: "Network.webSocketHandshakeResponseReceived", listener: (message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>) => void): this;
+        /**
+         * This event is fired instead of `Runtime.executionContextDestroyed` when
+         * enabled.
+         * It is fired when the Node process finished all code execution and is
+         * waiting for all frontends to disconnect.
+         */
+        prependListener(event: "NodeRuntime.waitingForDisconnect", listener: () => void): this;
+        /**
+         * This event is fired when the runtime is waiting for the debugger. For
+         * example, when inspector.waitingForDebugger is called
+         */
+        prependListener(event: "NodeRuntime.waitingForDebugger", listener: () => void): this;
+        /**
+         * Contains an bucket of collected trace events.
+         */
+        prependListener(event: "NodeTracing.dataCollected", listener: (message: InspectorNotification<NodeTracing.DataCollectedEventDataType>) => void): this;
+        /**
+         * Signals that tracing is stopped and there is no trace buffers pending flush, all data were
+         * delivered via dataCollected events.
+         */
+        prependListener(event: "NodeTracing.tracingComplete", listener: () => void): this;
+        /**
+         * Issued when attached to a worker.
+         */
+        prependListener(event: "NodeWorker.attachedToWorker", listener: (message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>) => void): this;
+        /**
+         * Issued when detached from the worker.
+         */
+        prependListener(event: "NodeWorker.detachedFromWorker", listener: (message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>) => void): this;
+        /**
+         * Notifies about a new protocol message received from the session
+         * (session ID is provided in attachedToWorker notification).
+         */
+        prependListener(event: "NodeWorker.receivedMessageFromWorker", listener: (message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>) => void): this;
+        prependListener(event: "Target.targetCreated", listener: (message: InspectorNotification<Target.TargetCreatedEventDataType>) => void): this;
+        prependListener(event: "Target.attachedToTarget", listener: (message: InspectorNotification<Target.AttachedToTargetEventDataType>) => void): this;
+        prependListener(event: "DOMStorage.domStorageItemAdded", listener: (message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>) => void): this;
+        prependListener(event: "DOMStorage.domStorageItemRemoved", listener: (message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>) => void): this;
+        prependListener(event: "DOMStorage.domStorageItemUpdated", listener: (message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>) => void): this;
+        prependListener(event: "DOMStorage.domStorageItemsCleared", listener: (message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>) => void): this;
+        prependOnceListener(event: string, listener: (...args: any[]) => void): this;
+        /**
+         * Emitted when any notification from the V8 Inspector is received.
+         */
+        prependOnceListener(event: "inspectorNotification", listener: (message: InspectorNotification<object>) => void): this;
+        /**
+         * Issued when new execution context is created.
+         */
+        prependOnceListener(event: "Runtime.executionContextCreated", listener: (message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>) => void): this;
+        /**
+         * Issued when execution context is destroyed.
+         */
+        prependOnceListener(event: "Runtime.executionContextDestroyed", listener: (message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>) => void): this;
+        /**
+         * Issued when all executionContexts were cleared in browser
+         */
+        prependOnceListener(event: "Runtime.executionContextsCleared", listener: () => void): this;
+        /**
+         * Issued when exception was thrown and unhandled.
+         */
+        prependOnceListener(event: "Runtime.exceptionThrown", listener: (message: InspectorNotification<Runtime.ExceptionThrownEventDataType>) => void): this;
+        /**
+         * Issued when unhandled exception was revoked.
+         */
+        prependOnceListener(event: "Runtime.exceptionRevoked", listener: (message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>) => void): this;
+        /**
+         * Issued when console API was called.
+         */
+        prependOnceListener(event: "Runtime.consoleAPICalled", listener: (message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>) => void): this;
+        /**
+         * Issued when object should be inspected (for example, as a result of inspect() command line API call).
+         */
+        prependOnceListener(event: "Runtime.inspectRequested", listener: (message: InspectorNotification<Runtime.InspectRequestedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger.
+         */
+        prependOnceListener(event: "Debugger.scriptParsed", listener: (message: InspectorNotification<Debugger.ScriptParsedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine fails to parse the script.
+         */
+        prependOnceListener(event: "Debugger.scriptFailedToParse", listener: (message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>) => void): this;
+        /**
+         * Fired when breakpoint is resolved to an actual script and location.
+         */
+        prependOnceListener(event: "Debugger.breakpointResolved", listener: (message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
+         */
+        prependOnceListener(event: "Debugger.paused", listener: (message: InspectorNotification<Debugger.PausedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine resumed execution.
+         */
+        prependOnceListener(event: "Debugger.resumed", listener: () => void): this;
+        /**
+         * Issued when new console message is added.
+         */
+        prependOnceListener(event: "Console.messageAdded", listener: (message: InspectorNotification<Console.MessageAddedEventDataType>) => void): this;
+        /**
+         * Sent when new profile recording is started using console.profile() call.
+         */
+        prependOnceListener(event: "Profiler.consoleProfileStarted", listener: (message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>) => void): this;
+        prependOnceListener(event: "Profiler.consoleProfileFinished", listener: (message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>) => void): this;
+        prependOnceListener(event: "HeapProfiler.addHeapSnapshotChunk", listener: (message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>) => void): this;
+        prependOnceListener(event: "HeapProfiler.resetProfiles", listener: () => void): this;
+        prependOnceListener(event: "HeapProfiler.reportHeapSnapshotProgress", listener: (message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend regularly sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
+         */
+        prependOnceListener(event: "HeapProfiler.lastSeenObjectId", listener: (message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend may send update for one or more fragments
+         */
+        prependOnceListener(event: "HeapProfiler.heapStatsUpdate", listener: (message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>) => void): this;
+        /**
+         * Fired when page is about to send HTTP request.
+         */
+        prependOnceListener(event: "Network.requestWillBeSent", listener: (message: InspectorNotification<Network.RequestWillBeSentEventDataType>) => void): this;
+        /**
+         * Fired when HTTP response is available.
+         */
+        prependOnceListener(event: "Network.responseReceived", listener: (message: InspectorNotification<Network.ResponseReceivedEventDataType>) => void): this;
+        prependOnceListener(event: "Network.loadingFailed", listener: (message: InspectorNotification<Network.LoadingFailedEventDataType>) => void): this;
+        prependOnceListener(event: "Network.loadingFinished", listener: (message: InspectorNotification<Network.LoadingFinishedEventDataType>) => void): this;
+        /**
+         * Fired when data chunk was received over the network.
+         */
+        prependOnceListener(event: "Network.dataReceived", listener: (message: InspectorNotification<Network.DataReceivedEventDataType>) => void): this;
+        /**
+         * Fired upon WebSocket creation.
+         */
+        prependOnceListener(event: "Network.webSocketCreated", listener: (message: InspectorNotification<Network.WebSocketCreatedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket is closed.
+         */
+        prependOnceListener(event: "Network.webSocketClosed", listener: (message: InspectorNotification<Network.WebSocketClosedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket handshake response becomes available.
+         */
+        prependOnceListener(event: "Network.webSocketHandshakeResponseReceived", listener: (message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>) => void): this;
+        /**
+         * This event is fired instead of `Runtime.executionContextDestroyed` when
+         * enabled.
+         * It is fired when the Node process finished all code execution and is
+         * waiting for all frontends to disconnect.
+         */
+        prependOnceListener(event: "NodeRuntime.waitingForDisconnect", listener: () => void): this;
+        /**
+         * This event is fired when the runtime is waiting for the debugger. For
+         * example, when inspector.waitingForDebugger is called
+         */
+        prependOnceListener(event: "NodeRuntime.waitingForDebugger", listener: () => void): this;
+        /**
+         * Contains an bucket of collected trace events.
+         */
+        prependOnceListener(event: "NodeTracing.dataCollected", listener: (message: InspectorNotification<NodeTracing.DataCollectedEventDataType>) => void): this;
+        /**
+         * Signals that tracing is stopped and there is no trace buffers pending flush, all data were
+         * delivered via dataCollected events.
+         */
+        prependOnceListener(event: "NodeTracing.tracingComplete", listener: () => void): this;
+        /**
+         * Issued when attached to a worker.
+         */
+        prependOnceListener(event: "NodeWorker.attachedToWorker", listener: (message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>) => void): this;
+        /**
+         * Issued when detached from the worker.
+         */
+        prependOnceListener(event: "NodeWorker.detachedFromWorker", listener: (message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>) => void): this;
+        /**
+         * Notifies about a new protocol message received from the session
+         * (session ID is provided in attachedToWorker notification).
+         */
+        prependOnceListener(event: "NodeWorker.receivedMessageFromWorker", listener: (message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>) => void): this;
+        prependOnceListener(event: "Target.targetCreated", listener: (message: InspectorNotification<Target.TargetCreatedEventDataType>) => void): this;
+        prependOnceListener(event: "Target.attachedToTarget", listener: (message: InspectorNotification<Target.AttachedToTargetEventDataType>) => void): this;
+        prependOnceListener(event: "DOMStorage.domStorageItemAdded", listener: (message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>) => void): this;
+        prependOnceListener(event: "DOMStorage.domStorageItemRemoved", listener: (message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>) => void): this;
+        prependOnceListener(event: "DOMStorage.domStorageItemUpdated", listener: (message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>) => void): this;
+        prependOnceListener(event: "DOMStorage.domStorageItemsCleared", listener: (message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>) => void): this;
+    }
+}
+declare module "node:inspector/promises" {
+    export {
+        Schema,
+        Runtime,
+        Debugger,
+        Console,
+        Profiler,
+        HeapProfiler,
+        IO,
+        Network,
+        NodeRuntime,
+        NodeTracing,
+        NodeWorker,
+        Target,
+        DOMStorage,
+        Storage,
+    } from 'inspector';
+}
+declare module "node:inspector/promises" {
+    import {
+        InspectorNotification,
+        Schema,
+        Runtime,
+        Debugger,
+        Console,
+        Profiler,
+        HeapProfiler,
+        IO,
+        Network,
+        NodeRuntime,
+        NodeTracing,
+        NodeWorker,
+        Target,
+        DOMStorage,
+        Storage,
+    } from "inspector";
+    /**
+     * The `inspector.Session` is used for dispatching messages to the V8 inspector
+     * back-end and receiving message responses and notifications.
+     * @since v19.0.0
+     */
+    interface Session {
+        /**
+         * Posts a message to the inspector back-end.
+         *
+         * ```js
+         * import { Session } from 'node:inspector/promises';
+         * try {
+         *   const session = new Session();
+         *   session.connect();
+         *   const result = await session.post('Runtime.evaluate', { expression: '2 + 2' });
+         *   console.log(result);
+         * } catch (error) {
+         *   console.error(error);
+         * }
+         * // Output: { result: { type: 'number', value: 4, description: '4' } }
+         * ```
+         *
+         * The latest version of the V8 inspector protocol is published on the
+         * [Chrome DevTools Protocol Viewer](https://chromedevtools.github.io/devtools-protocol/v8/).
+         *
+         * Node.js inspector supports all the Chrome DevTools Protocol domains declared
+         * by V8. Chrome DevTools Protocol domain provides an interface for interacting
+         * with one of the runtime agents used to inspect the application state and listen
+         * to the run-time events.
+         */
+        post(method: string, params?: object): Promise<void>;
+        /**
+         * Returns supported domains.
+         */
+        post(method: "Schema.getDomains"): Promise<Schema.GetDomainsReturnType>;
+        /**
+         * Evaluates expression on global object.
+         */
+        post(method: "Runtime.evaluate", params?: Runtime.EvaluateParameterType): Promise<Runtime.EvaluateReturnType>;
+        /**
+         * Add handler to promise with given promise object id.
+         */
+        post(method: "Runtime.awaitPromise", params?: Runtime.AwaitPromiseParameterType): Promise<Runtime.AwaitPromiseReturnType>;
+        /**
+         * Calls function with given declaration on the given object. Object group of the result is inherited from the target object.
+         */
+        post(method: "Runtime.callFunctionOn", params?: Runtime.CallFunctionOnParameterType): Promise<Runtime.CallFunctionOnReturnType>;
+        /**
+         * Returns properties of a given object. Object group of the result is inherited from the target object.
+         */
+        post(method: "Runtime.getProperties", params?: Runtime.GetPropertiesParameterType): Promise<Runtime.GetPropertiesReturnType>;
+        /**
+         * Releases remote object with given id.
+         */
+        post(method: "Runtime.releaseObject", params?: Runtime.ReleaseObjectParameterType): Promise<void>;
+        /**
+         * Releases all remote objects that belong to a given group.
+         */
+        post(method: "Runtime.releaseObjectGroup", params?: Runtime.ReleaseObjectGroupParameterType): Promise<void>;
+        /**
+         * Tells inspected instance to run if it was waiting for debugger to attach.
+         */
+        post(method: "Runtime.runIfWaitingForDebugger"): Promise<void>;
+        /**
+         * Enables reporting of execution contexts creation by means of <code>executionContextCreated</code> event. When the reporting gets enabled the event will be sent immediately for each existing execution context.
+         */
+        post(method: "Runtime.enable"): Promise<void>;
+        /**
+         * Disables reporting of execution contexts creation.
+         */
+        post(method: "Runtime.disable"): Promise<void>;
+        /**
+         * Discards collected exceptions and console API calls.
+         */
+        post(method: "Runtime.discardConsoleEntries"): Promise<void>;
+        /**
+         * @experimental
+         */
+        post(method: "Runtime.setCustomObjectFormatterEnabled", params?: Runtime.SetCustomObjectFormatterEnabledParameterType): Promise<void>;
+        /**
+         * Compiles expression.
+         */
+        post(method: "Runtime.compileScript", params?: Runtime.CompileScriptParameterType): Promise<Runtime.CompileScriptReturnType>;
+        /**
+         * Runs script with given id in a given context.
+         */
+        post(method: "Runtime.runScript", params?: Runtime.RunScriptParameterType): Promise<Runtime.RunScriptReturnType>;
+        post(method: "Runtime.queryObjects", params?: Runtime.QueryObjectsParameterType): Promise<Runtime.QueryObjectsReturnType>;
+        /**
+         * Returns all let, const and class variables from global scope.
+         */
+        post(method: "Runtime.globalLexicalScopeNames", params?: Runtime.GlobalLexicalScopeNamesParameterType): Promise<Runtime.GlobalLexicalScopeNamesReturnType>;
+        /**
+         * Enables debugger for the given page. Clients should not assume that the debugging has been enabled until the result for this command is received.
+         */
+        post(method: "Debugger.enable"): Promise<Debugger.EnableReturnType>;
+        /**
+         * Disables debugger for given page.
+         */
+        post(method: "Debugger.disable"): Promise<void>;
+        /**
+         * Activates / deactivates all breakpoints on the page.
+         */
+        post(method: "Debugger.setBreakpointsActive", params?: Debugger.SetBreakpointsActiveParameterType): Promise<void>;
+        /**
+         * Makes page not interrupt on any pauses (breakpoint, exception, dom exception etc).
+         */
+        post(method: "Debugger.setSkipAllPauses", params?: Debugger.SetSkipAllPausesParameterType): Promise<void>;
+        /**
+         * Sets JavaScript breakpoint at given location specified either by URL or URL regex. Once this command is issued, all existing parsed scripts will have breakpoints resolved and returned in <code>locations</code> property. Further matching script parsing will result in subsequent <code>breakpointResolved</code> events issued. This logical breakpoint will survive page reloads.
+         */
+        post(method: "Debugger.setBreakpointByUrl", params?: Debugger.SetBreakpointByUrlParameterType): Promise<Debugger.SetBreakpointByUrlReturnType>;
+        /**
+         * Sets JavaScript breakpoint at a given location.
+         */
+        post(method: "Debugger.setBreakpoint", params?: Debugger.SetBreakpointParameterType): Promise<Debugger.SetBreakpointReturnType>;
+        /**
+         * Removes JavaScript breakpoint.
+         */
+        post(method: "Debugger.removeBreakpoint", params?: Debugger.RemoveBreakpointParameterType): Promise<void>;
+        /**
+         * Returns possible locations for breakpoint. scriptId in start and end range locations should be the same.
+         */
+        post(method: "Debugger.getPossibleBreakpoints", params?: Debugger.GetPossibleBreakpointsParameterType): Promise<Debugger.GetPossibleBreakpointsReturnType>;
+        /**
+         * Continues execution until specific location is reached.
+         */
+        post(method: "Debugger.continueToLocation", params?: Debugger.ContinueToLocationParameterType): Promise<void>;
+        /**
+         * @experimental
+         */
+        post(method: "Debugger.pauseOnAsyncCall", params?: Debugger.PauseOnAsyncCallParameterType): Promise<void>;
+        /**
+         * Steps over the statement.
+         */
+        post(method: "Debugger.stepOver"): Promise<void>;
+        /**
+         * Steps into the function call.
+         */
+        post(method: "Debugger.stepInto", params?: Debugger.StepIntoParameterType): Promise<void>;
+        /**
+         * Steps out of the function call.
+         */
+        post(method: "Debugger.stepOut"): Promise<void>;
+        /**
+         * Stops on the next JavaScript statement.
+         */
+        post(method: "Debugger.pause"): Promise<void>;
+        /**
+         * This method is deprecated - use Debugger.stepInto with breakOnAsyncCall and Debugger.pauseOnAsyncTask instead. Steps into next scheduled async task if any is scheduled before next pause. Returns success when async task is actually scheduled, returns error if no task were scheduled or another scheduleStepIntoAsync was called.
+         * @experimental
+         */
+        post(method: "Debugger.scheduleStepIntoAsync"): Promise<void>;
+        /**
+         * Resumes JavaScript execution.
+         */
+        post(method: "Debugger.resume"): Promise<void>;
+        /**
+         * Returns stack trace with given <code>stackTraceId</code>.
+         * @experimental
+         */
+        post(method: "Debugger.getStackTrace", params?: Debugger.GetStackTraceParameterType): Promise<Debugger.GetStackTraceReturnType>;
+        /**
+         * Searches for given string in script content.
+         */
+        post(method: "Debugger.searchInContent", params?: Debugger.SearchInContentParameterType): Promise<Debugger.SearchInContentReturnType>;
+        /**
+         * Edits JavaScript source live.
+         */
+        post(method: "Debugger.setScriptSource", params?: Debugger.SetScriptSourceParameterType): Promise<Debugger.SetScriptSourceReturnType>;
+        /**
+         * Restarts particular call frame from the beginning.
+         */
+        post(method: "Debugger.restartFrame", params?: Debugger.RestartFrameParameterType): Promise<Debugger.RestartFrameReturnType>;
+        /**
+         * Returns source for the script with given id.
+         */
+        post(method: "Debugger.getScriptSource", params?: Debugger.GetScriptSourceParameterType): Promise<Debugger.GetScriptSourceReturnType>;
+        /**
+         * Defines pause on exceptions state. Can be set to stop on all exceptions, uncaught exceptions or no exceptions. Initial pause on exceptions state is <code>none</code>.
+         */
+        post(method: "Debugger.setPauseOnExceptions", params?: Debugger.SetPauseOnExceptionsParameterType): Promise<void>;
+        /**
+         * Evaluates expression on a given call frame.
+         */
+        post(method: "Debugger.evaluateOnCallFrame", params?: Debugger.EvaluateOnCallFrameParameterType): Promise<Debugger.EvaluateOnCallFrameReturnType>;
+        /**
+         * Changes value of variable in a callframe. Object-based scopes are not supported and must be mutated manually.
+         */
+        post(method: "Debugger.setVariableValue", params?: Debugger.SetVariableValueParameterType): Promise<void>;
+        /**
+         * Changes return value in top frame. Available only at return break position.
+         * @experimental
+         */
+        post(method: "Debugger.setReturnValue", params?: Debugger.SetReturnValueParameterType): Promise<void>;
+        /**
+         * Enables or disables async call stacks tracking.
+         */
+        post(method: "Debugger.setAsyncCallStackDepth", params?: Debugger.SetAsyncCallStackDepthParameterType): Promise<void>;
+        /**
+         * Replace previous blackbox patterns with passed ones. Forces backend to skip stepping/pausing in scripts with url matching one of the patterns. VM will try to leave blackboxed script by performing 'step in' several times, finally resorting to 'step out' if unsuccessful.
+         * @experimental
+         */
+        post(method: "Debugger.setBlackboxPatterns", params?: Debugger.SetBlackboxPatternsParameterType): Promise<void>;
+        /**
+         * Makes backend skip steps in the script in blackboxed ranges. VM will try leave blacklisted scripts by performing 'step in' several times, finally resorting to 'step out' if unsuccessful. Positions array contains positions where blackbox state is changed. First interval isn't blackboxed. Array should be sorted.
+         * @experimental
+         */
+        post(method: "Debugger.setBlackboxedRanges", params?: Debugger.SetBlackboxedRangesParameterType): Promise<void>;
+        /**
+         * Enables console domain, sends the messages collected so far to the client by means of the <code>messageAdded</code> notification.
+         */
+        post(method: "Console.enable"): Promise<void>;
+        /**
+         * Disables console domain, prevents further console messages from being reported to the client.
+         */
+        post(method: "Console.disable"): Promise<void>;
+        /**
+         * Does nothing.
+         */
+        post(method: "Console.clearMessages"): Promise<void>;
+        post(method: "Profiler.enable"): Promise<void>;
+        post(method: "Profiler.disable"): Promise<void>;
+        /**
+         * Changes CPU profiler sampling interval. Must be called before CPU profiles recording started.
+         */
+        post(method: "Profiler.setSamplingInterval", params?: Profiler.SetSamplingIntervalParameterType): Promise<void>;
+        post(method: "Profiler.start"): Promise<void>;
+        post(method: "Profiler.stop"): Promise<Profiler.StopReturnType>;
+        /**
+         * Enable precise code coverage. Coverage data for JavaScript executed before enabling precise code coverage may be incomplete. Enabling prevents running optimized code and resets execution counters.
+         */
+        post(method: "Profiler.startPreciseCoverage", params?: Profiler.StartPreciseCoverageParameterType): Promise<void>;
+        /**
+         * Disable precise code coverage. Disabling releases unnecessary execution count records and allows executing optimized code.
+         */
+        post(method: "Profiler.stopPreciseCoverage"): Promise<void>;
+        /**
+         * Collect coverage data for the current isolate, and resets execution counters. Precise code coverage needs to have started.
+         */
+        post(method: "Profiler.takePreciseCoverage"): Promise<Profiler.TakePreciseCoverageReturnType>;
+        /**
+         * Collect coverage data for the current isolate. The coverage data may be incomplete due to garbage collection.
+         */
+        post(method: "Profiler.getBestEffortCoverage"): Promise<Profiler.GetBestEffortCoverageReturnType>;
+        post(method: "HeapProfiler.enable"): Promise<void>;
+        post(method: "HeapProfiler.disable"): Promise<void>;
+        post(method: "HeapProfiler.startTrackingHeapObjects", params?: HeapProfiler.StartTrackingHeapObjectsParameterType): Promise<void>;
+        post(method: "HeapProfiler.stopTrackingHeapObjects", params?: HeapProfiler.StopTrackingHeapObjectsParameterType): Promise<void>;
+        post(method: "HeapProfiler.takeHeapSnapshot", params?: HeapProfiler.TakeHeapSnapshotParameterType): Promise<void>;
+        post(method: "HeapProfiler.collectGarbage"): Promise<void>;
+        post(method: "HeapProfiler.getObjectByHeapObjectId", params?: HeapProfiler.GetObjectByHeapObjectIdParameterType): Promise<HeapProfiler.GetObjectByHeapObjectIdReturnType>;
+        /**
+         * Enables console to refer to the node with given id via $x (see Command Line API for more details $x functions).
+         */
+        post(method: "HeapProfiler.addInspectedHeapObject", params?: HeapProfiler.AddInspectedHeapObjectParameterType): Promise<void>;
+        post(method: "HeapProfiler.getHeapObjectId", params?: HeapProfiler.GetHeapObjectIdParameterType): Promise<HeapProfiler.GetHeapObjectIdReturnType>;
+        post(method: "HeapProfiler.startSampling", params?: HeapProfiler.StartSamplingParameterType): Promise<void>;
+        post(method: "HeapProfiler.stopSampling"): Promise<HeapProfiler.StopSamplingReturnType>;
+        post(method: "HeapProfiler.getSamplingProfile"): Promise<HeapProfiler.GetSamplingProfileReturnType>;
+        /**
+         * Read a chunk of the stream
+         */
+        post(method: "IO.read", params?: IO.ReadParameterType): Promise<IO.ReadReturnType>;
+        post(method: "IO.close", params?: IO.CloseParameterType): Promise<void>;
+        /**
+         * Disables network tracking, prevents network events from being sent to the client.
+         */
+        post(method: "Network.disable"): Promise<void>;
+        /**
+         * Enables network tracking, network events will now be delivered to the client.
+         */
+        post(method: "Network.enable", params?: Network.EnableParameterType): Promise<void>;
+        /**
+         * Returns post data sent with the request. Returns an error when no data was sent with the request.
+         */
+        post(method: "Network.getRequestPostData", params?: Network.GetRequestPostDataParameterType): Promise<Network.GetRequestPostDataReturnType>;
+        /**
+         * Returns content served for the given request.
+         */
+        post(method: "Network.getResponseBody", params?: Network.GetResponseBodyParameterType): Promise<Network.GetResponseBodyReturnType>;
+        /**
+         * Enables streaming of the response for the given requestId.
+         * If enabled, the dataReceived event contains the data that was received during streaming.
+         * @experimental
+         */
+        post(method: "Network.streamResourceContent", params?: Network.StreamResourceContentParameterType): Promise<Network.StreamResourceContentReturnType>;
+        /**
+         * Fetches the resource and returns the content.
+         */
+        post(method: "Network.loadNetworkResource", params?: Network.LoadNetworkResourceParameterType): Promise<Network.LoadNetworkResourceReturnType>;
+        /**
+         * Enable the NodeRuntime events except by `NodeRuntime.waitingForDisconnect`.
+         */
+        post(method: "NodeRuntime.enable"): Promise<void>;
+        /**
+         * Disable NodeRuntime events
+         */
+        post(method: "NodeRuntime.disable"): Promise<void>;
+        /**
+         * Enable the `NodeRuntime.waitingForDisconnect`.
+         */
+        post(method: "NodeRuntime.notifyWhenWaitingForDisconnect", params?: NodeRuntime.NotifyWhenWaitingForDisconnectParameterType): Promise<void>;
+        /**
+         * Gets supported tracing categories.
+         */
+        post(method: "NodeTracing.getCategories"): Promise<NodeTracing.GetCategoriesReturnType>;
+        /**
+         * Start trace events collection.
+         */
+        post(method: "NodeTracing.start", params?: NodeTracing.StartParameterType): Promise<void>;
+        /**
+         * Stop trace events collection. Remaining collected events will be sent as a sequence of
+         * dataCollected events followed by tracingComplete event.
+         */
+        post(method: "NodeTracing.stop"): Promise<void>;
+        /**
+         * Sends protocol message over session with given id.
+         */
+        post(method: "NodeWorker.sendMessageToWorker", params?: NodeWorker.SendMessageToWorkerParameterType): Promise<void>;
+        /**
+         * Instructs the inspector to attach to running workers. Will also attach to new workers
+         * as they start
+         */
+        post(method: "NodeWorker.enable", params?: NodeWorker.EnableParameterType): Promise<void>;
+        /**
+         * Detaches from all running workers and disables attaching to new workers as they are started.
+         */
+        post(method: "NodeWorker.disable"): Promise<void>;
+        /**
+         * Detached from the worker with given sessionId.
+         */
+        post(method: "NodeWorker.detach", params?: NodeWorker.DetachParameterType): Promise<void>;
+        post(method: "Target.setAutoAttach", params?: Target.SetAutoAttachParameterType): Promise<void>;
+        post(method: "DOMStorage.clear", params?: DOMStorage.ClearParameterType): Promise<void>;
+        /**
+         * Disables storage tracking, prevents storage events from being sent to the client.
+         */
+        post(method: "DOMStorage.disable"): Promise<void>;
+        /**
+         * Enables storage tracking, storage events will now be delivered to the client.
+         */
+        post(method: "DOMStorage.enable"): Promise<void>;
+        post(method: "DOMStorage.getDOMStorageItems", params?: DOMStorage.GetDOMStorageItemsParameterType): Promise<DOMStorage.GetDOMStorageItemsReturnType>;
+        post(method: "DOMStorage.removeDOMStorageItem", params?: DOMStorage.RemoveDOMStorageItemParameterType): Promise<void>;
+        post(method: "DOMStorage.setDOMStorageItem", params?: DOMStorage.SetDOMStorageItemParameterType): Promise<void>;
+        /**
+         * @experimental
+         */
+        post(method: "Storage.getStorageKey", params?: Storage.GetStorageKeyParameterType): Promise<Storage.GetStorageKeyReturnType>;
+        addListener(event: string, listener: (...args: any[]) => void): this;
+        /**
+         * Emitted when any notification from the V8 Inspector is received.
+         */
+        addListener(event: "inspectorNotification", listener: (message: InspectorNotification<object>) => void): this;
+        /**
+         * Issued when new execution context is created.
+         */
+        addListener(event: "Runtime.executionContextCreated", listener: (message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>) => void): this;
+        /**
+         * Issued when execution context is destroyed.
+         */
+        addListener(event: "Runtime.executionContextDestroyed", listener: (message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>) => void): this;
+        /**
+         * Issued when all executionContexts were cleared in browser
+         */
+        addListener(event: "Runtime.executionContextsCleared", listener: () => void): this;
+        /**
+         * Issued when exception was thrown and unhandled.
+         */
+        addListener(event: "Runtime.exceptionThrown", listener: (message: InspectorNotification<Runtime.ExceptionThrownEventDataType>) => void): this;
+        /**
+         * Issued when unhandled exception was revoked.
+         */
+        addListener(event: "Runtime.exceptionRevoked", listener: (message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>) => void): this;
+        /**
+         * Issued when console API was called.
+         */
+        addListener(event: "Runtime.consoleAPICalled", listener: (message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>) => void): this;
+        /**
+         * Issued when object should be inspected (for example, as a result of inspect() command line API call).
+         */
+        addListener(event: "Runtime.inspectRequested", listener: (message: InspectorNotification<Runtime.InspectRequestedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger.
+         */
+        addListener(event: "Debugger.scriptParsed", listener: (message: InspectorNotification<Debugger.ScriptParsedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine fails to parse the script.
+         */
+        addListener(event: "Debugger.scriptFailedToParse", listener: (message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>) => void): this;
+        /**
+         * Fired when breakpoint is resolved to an actual script and location.
+         */
+        addListener(event: "Debugger.breakpointResolved", listener: (message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
+         */
+        addListener(event: "Debugger.paused", listener: (message: InspectorNotification<Debugger.PausedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine resumed execution.
+         */
+        addListener(event: "Debugger.resumed", listener: () => void): this;
+        /**
+         * Issued when new console message is added.
+         */
+        addListener(event: "Console.messageAdded", listener: (message: InspectorNotification<Console.MessageAddedEventDataType>) => void): this;
+        /**
+         * Sent when new profile recording is started using console.profile() call.
+         */
+        addListener(event: "Profiler.consoleProfileStarted", listener: (message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>) => void): this;
+        addListener(event: "Profiler.consoleProfileFinished", listener: (message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>) => void): this;
+        addListener(event: "HeapProfiler.addHeapSnapshotChunk", listener: (message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>) => void): this;
+        addListener(event: "HeapProfiler.resetProfiles", listener: () => void): this;
+        addListener(event: "HeapProfiler.reportHeapSnapshotProgress", listener: (message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend regularly sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
+         */
+        addListener(event: "HeapProfiler.lastSeenObjectId", listener: (message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend may send update for one or more fragments
+         */
+        addListener(event: "HeapProfiler.heapStatsUpdate", listener: (message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>) => void): this;
+        /**
+         * Fired when page is about to send HTTP request.
+         */
+        addListener(event: "Network.requestWillBeSent", listener: (message: InspectorNotification<Network.RequestWillBeSentEventDataType>) => void): this;
+        /**
+         * Fired when HTTP response is available.
+         */
+        addListener(event: "Network.responseReceived", listener: (message: InspectorNotification<Network.ResponseReceivedEventDataType>) => void): this;
+        addListener(event: "Network.loadingFailed", listener: (message: InspectorNotification<Network.LoadingFailedEventDataType>) => void): this;
+        addListener(event: "Network.loadingFinished", listener: (message: InspectorNotification<Network.LoadingFinishedEventDataType>) => void): this;
+        /**
+         * Fired when data chunk was received over the network.
+         */
+        addListener(event: "Network.dataReceived", listener: (message: InspectorNotification<Network.DataReceivedEventDataType>) => void): this;
+        /**
+         * Fired upon WebSocket creation.
+         */
+        addListener(event: "Network.webSocketCreated", listener: (message: InspectorNotification<Network.WebSocketCreatedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket is closed.
+         */
+        addListener(event: "Network.webSocketClosed", listener: (message: InspectorNotification<Network.WebSocketClosedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket handshake response becomes available.
+         */
+        addListener(event: "Network.webSocketHandshakeResponseReceived", listener: (message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>) => void): this;
+        /**
+         * This event is fired instead of `Runtime.executionContextDestroyed` when
+         * enabled.
+         * It is fired when the Node process finished all code execution and is
+         * waiting for all frontends to disconnect.
+         */
+        addListener(event: "NodeRuntime.waitingForDisconnect", listener: () => void): this;
+        /**
+         * This event is fired when the runtime is waiting for the debugger. For
+         * example, when inspector.waitingForDebugger is called
+         */
+        addListener(event: "NodeRuntime.waitingForDebugger", listener: () => void): this;
+        /**
+         * Contains an bucket of collected trace events.
+         */
+        addListener(event: "NodeTracing.dataCollected", listener: (message: InspectorNotification<NodeTracing.DataCollectedEventDataType>) => void): this;
+        /**
+         * Signals that tracing is stopped and there is no trace buffers pending flush, all data were
+         * delivered via dataCollected events.
+         */
+        addListener(event: "NodeTracing.tracingComplete", listener: () => void): this;
+        /**
+         * Issued when attached to a worker.
+         */
+        addListener(event: "NodeWorker.attachedToWorker", listener: (message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>) => void): this;
+        /**
+         * Issued when detached from the worker.
+         */
+        addListener(event: "NodeWorker.detachedFromWorker", listener: (message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>) => void): this;
+        /**
+         * Notifies about a new protocol message received from the session
+         * (session ID is provided in attachedToWorker notification).
+         */
+        addListener(event: "NodeWorker.receivedMessageFromWorker", listener: (message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>) => void): this;
+        addListener(event: "Target.targetCreated", listener: (message: InspectorNotification<Target.TargetCreatedEventDataType>) => void): this;
+        addListener(event: "Target.attachedToTarget", listener: (message: InspectorNotification<Target.AttachedToTargetEventDataType>) => void): this;
+        addListener(event: "DOMStorage.domStorageItemAdded", listener: (message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>) => void): this;
+        addListener(event: "DOMStorage.domStorageItemRemoved", listener: (message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>) => void): this;
+        addListener(event: "DOMStorage.domStorageItemUpdated", listener: (message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>) => void): this;
+        addListener(event: "DOMStorage.domStorageItemsCleared", listener: (message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>) => void): this;
+        emit(event: string | symbol, ...args: any[]): boolean;
+        emit(event: "inspectorNotification", message: InspectorNotification<object>): boolean;
+        emit(event: "Runtime.executionContextCreated", message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>): boolean;
+        emit(event: "Runtime.executionContextDestroyed", message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>): boolean;
+        emit(event: "Runtime.executionContextsCleared"): boolean;
+        emit(event: "Runtime.exceptionThrown", message: InspectorNotification<Runtime.ExceptionThrownEventDataType>): boolean;
+        emit(event: "Runtime.exceptionRevoked", message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>): boolean;
+        emit(event: "Runtime.consoleAPICalled", message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>): boolean;
+        emit(event: "Runtime.inspectRequested", message: InspectorNotification<Runtime.InspectRequestedEventDataType>): boolean;
+        emit(event: "Debugger.scriptParsed", message: InspectorNotification<Debugger.ScriptParsedEventDataType>): boolean;
+        emit(event: "Debugger.scriptFailedToParse", message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>): boolean;
+        emit(event: "Debugger.breakpointResolved", message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>): boolean;
+        emit(event: "Debugger.paused", message: InspectorNotification<Debugger.PausedEventDataType>): boolean;
+        emit(event: "Debugger.resumed"): boolean;
+        emit(event: "Console.messageAdded", message: InspectorNotification<Console.MessageAddedEventDataType>): boolean;
+        emit(event: "Profiler.consoleProfileStarted", message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>): boolean;
+        emit(event: "Profiler.consoleProfileFinished", message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>): boolean;
+        emit(event: "HeapProfiler.addHeapSnapshotChunk", message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>): boolean;
+        emit(event: "HeapProfiler.resetProfiles"): boolean;
+        emit(event: "HeapProfiler.reportHeapSnapshotProgress", message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>): boolean;
+        emit(event: "HeapProfiler.lastSeenObjectId", message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>): boolean;
+        emit(event: "HeapProfiler.heapStatsUpdate", message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>): boolean;
+        emit(event: "Network.requestWillBeSent", message: InspectorNotification<Network.RequestWillBeSentEventDataType>): boolean;
+        emit(event: "Network.responseReceived", message: InspectorNotification<Network.ResponseReceivedEventDataType>): boolean;
+        emit(event: "Network.loadingFailed", message: InspectorNotification<Network.LoadingFailedEventDataType>): boolean;
+        emit(event: "Network.loadingFinished", message: InspectorNotification<Network.LoadingFinishedEventDataType>): boolean;
+        emit(event: "Network.dataReceived", message: InspectorNotification<Network.DataReceivedEventDataType>): boolean;
+        emit(event: "Network.webSocketCreated", message: InspectorNotification<Network.WebSocketCreatedEventDataType>): boolean;
+        emit(event: "Network.webSocketClosed", message: InspectorNotification<Network.WebSocketClosedEventDataType>): boolean;
+        emit(event: "Network.webSocketHandshakeResponseReceived", message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>): boolean;
+        emit(event: "NodeRuntime.waitingForDisconnect"): boolean;
+        emit(event: "NodeRuntime.waitingForDebugger"): boolean;
+        emit(event: "NodeTracing.dataCollected", message: InspectorNotification<NodeTracing.DataCollectedEventDataType>): boolean;
+        emit(event: "NodeTracing.tracingComplete"): boolean;
+        emit(event: "NodeWorker.attachedToWorker", message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>): boolean;
+        emit(event: "NodeWorker.detachedFromWorker", message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>): boolean;
+        emit(event: "NodeWorker.receivedMessageFromWorker", message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>): boolean;
+        emit(event: "Target.targetCreated", message: InspectorNotification<Target.TargetCreatedEventDataType>): boolean;
+        emit(event: "Target.attachedToTarget", message: InspectorNotification<Target.AttachedToTargetEventDataType>): boolean;
+        emit(event: "DOMStorage.domStorageItemAdded", message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>): boolean;
+        emit(event: "DOMStorage.domStorageItemRemoved", message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>): boolean;
+        emit(event: "DOMStorage.domStorageItemUpdated", message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>): boolean;
+        emit(event: "DOMStorage.domStorageItemsCleared", message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>): boolean;
+        on(event: string, listener: (...args: any[]) => void): this;
+        /**
+         * Emitted when any notification from the V8 Inspector is received.
+         */
+        on(event: "inspectorNotification", listener: (message: InspectorNotification<object>) => void): this;
+        /**
+         * Issued when new execution context is created.
+         */
+        on(event: "Runtime.executionContextCreated", listener: (message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>) => void): this;
+        /**
+         * Issued when execution context is destroyed.
+         */
+        on(event: "Runtime.executionContextDestroyed", listener: (message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>) => void): this;
+        /**
+         * Issued when all executionContexts were cleared in browser
+         */
+        on(event: "Runtime.executionContextsCleared", listener: () => void): this;
+        /**
+         * Issued when exception was thrown and unhandled.
+         */
+        on(event: "Runtime.exceptionThrown", listener: (message: InspectorNotification<Runtime.ExceptionThrownEventDataType>) => void): this;
+        /**
+         * Issued when unhandled exception was revoked.
+         */
+        on(event: "Runtime.exceptionRevoked", listener: (message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>) => void): this;
+        /**
+         * Issued when console API was called.
+         */
+        on(event: "Runtime.consoleAPICalled", listener: (message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>) => void): this;
+        /**
+         * Issued when object should be inspected (for example, as a result of inspect() command line API call).
+         */
+        on(event: "Runtime.inspectRequested", listener: (message: InspectorNotification<Runtime.InspectRequestedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger.
+         */
+        on(event: "Debugger.scriptParsed", listener: (message: InspectorNotification<Debugger.ScriptParsedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine fails to parse the script.
+         */
+        on(event: "Debugger.scriptFailedToParse", listener: (message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>) => void): this;
+        /**
+         * Fired when breakpoint is resolved to an actual script and location.
+         */
+        on(event: "Debugger.breakpointResolved", listener: (message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
+         */
+        on(event: "Debugger.paused", listener: (message: InspectorNotification<Debugger.PausedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine resumed execution.
+         */
+        on(event: "Debugger.resumed", listener: () => void): this;
+        /**
+         * Issued when new console message is added.
+         */
+        on(event: "Console.messageAdded", listener: (message: InspectorNotification<Console.MessageAddedEventDataType>) => void): this;
+        /**
+         * Sent when new profile recording is started using console.profile() call.
+         */
+        on(event: "Profiler.consoleProfileStarted", listener: (message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>) => void): this;
+        on(event: "Profiler.consoleProfileFinished", listener: (message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>) => void): this;
+        on(event: "HeapProfiler.addHeapSnapshotChunk", listener: (message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>) => void): this;
+        on(event: "HeapProfiler.resetProfiles", listener: () => void): this;
+        on(event: "HeapProfiler.reportHeapSnapshotProgress", listener: (message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend regularly sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
+         */
+        on(event: "HeapProfiler.lastSeenObjectId", listener: (message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend may send update for one or more fragments
+         */
+        on(event: "HeapProfiler.heapStatsUpdate", listener: (message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>) => void): this;
+        /**
+         * Fired when page is about to send HTTP request.
+         */
+        on(event: "Network.requestWillBeSent", listener: (message: InspectorNotification<Network.RequestWillBeSentEventDataType>) => void): this;
+        /**
+         * Fired when HTTP response is available.
+         */
+        on(event: "Network.responseReceived", listener: (message: InspectorNotification<Network.ResponseReceivedEventDataType>) => void): this;
+        on(event: "Network.loadingFailed", listener: (message: InspectorNotification<Network.LoadingFailedEventDataType>) => void): this;
+        on(event: "Network.loadingFinished", listener: (message: InspectorNotification<Network.LoadingFinishedEventDataType>) => void): this;
+        /**
+         * Fired when data chunk was received over the network.
+         */
+        on(event: "Network.dataReceived", listener: (message: InspectorNotification<Network.DataReceivedEventDataType>) => void): this;
+        /**
+         * Fired upon WebSocket creation.
+         */
+        on(event: "Network.webSocketCreated", listener: (message: InspectorNotification<Network.WebSocketCreatedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket is closed.
+         */
+        on(event: "Network.webSocketClosed", listener: (message: InspectorNotification<Network.WebSocketClosedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket handshake response becomes available.
+         */
+        on(event: "Network.webSocketHandshakeResponseReceived", listener: (message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>) => void): this;
+        /**
+         * This event is fired instead of `Runtime.executionContextDestroyed` when
+         * enabled.
+         * It is fired when the Node process finished all code execution and is
+         * waiting for all frontends to disconnect.
+         */
+        on(event: "NodeRuntime.waitingForDisconnect", listener: () => void): this;
+        /**
+         * This event is fired when the runtime is waiting for the debugger. For
+         * example, when inspector.waitingForDebugger is called
+         */
+        on(event: "NodeRuntime.waitingForDebugger", listener: () => void): this;
+        /**
+         * Contains an bucket of collected trace events.
+         */
+        on(event: "NodeTracing.dataCollected", listener: (message: InspectorNotification<NodeTracing.DataCollectedEventDataType>) => void): this;
+        /**
+         * Signals that tracing is stopped and there is no trace buffers pending flush, all data were
+         * delivered via dataCollected events.
+         */
+        on(event: "NodeTracing.tracingComplete", listener: () => void): this;
+        /**
+         * Issued when attached to a worker.
+         */
+        on(event: "NodeWorker.attachedToWorker", listener: (message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>) => void): this;
+        /**
+         * Issued when detached from the worker.
+         */
+        on(event: "NodeWorker.detachedFromWorker", listener: (message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>) => void): this;
+        /**
+         * Notifies about a new protocol message received from the session
+         * (session ID is provided in attachedToWorker notification).
+         */
+        on(event: "NodeWorker.receivedMessageFromWorker", listener: (message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>) => void): this;
+        on(event: "Target.targetCreated", listener: (message: InspectorNotification<Target.TargetCreatedEventDataType>) => void): this;
+        on(event: "Target.attachedToTarget", listener: (message: InspectorNotification<Target.AttachedToTargetEventDataType>) => void): this;
+        on(event: "DOMStorage.domStorageItemAdded", listener: (message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>) => void): this;
+        on(event: "DOMStorage.domStorageItemRemoved", listener: (message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>) => void): this;
+        on(event: "DOMStorage.domStorageItemUpdated", listener: (message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>) => void): this;
+        on(event: "DOMStorage.domStorageItemsCleared", listener: (message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>) => void): this;
+        once(event: string, listener: (...args: any[]) => void): this;
+        /**
+         * Emitted when any notification from the V8 Inspector is received.
+         */
+        once(event: "inspectorNotification", listener: (message: InspectorNotification<object>) => void): this;
+        /**
+         * Issued when new execution context is created.
+         */
+        once(event: "Runtime.executionContextCreated", listener: (message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>) => void): this;
+        /**
+         * Issued when execution context is destroyed.
+         */
+        once(event: "Runtime.executionContextDestroyed", listener: (message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>) => void): this;
+        /**
+         * Issued when all executionContexts were cleared in browser
+         */
+        once(event: "Runtime.executionContextsCleared", listener: () => void): this;
+        /**
+         * Issued when exception was thrown and unhandled.
+         */
+        once(event: "Runtime.exceptionThrown", listener: (message: InspectorNotification<Runtime.ExceptionThrownEventDataType>) => void): this;
+        /**
+         * Issued when unhandled exception was revoked.
+         */
+        once(event: "Runtime.exceptionRevoked", listener: (message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>) => void): this;
+        /**
+         * Issued when console API was called.
+         */
+        once(event: "Runtime.consoleAPICalled", listener: (message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>) => void): this;
+        /**
+         * Issued when object should be inspected (for example, as a result of inspect() command line API call).
+         */
+        once(event: "Runtime.inspectRequested", listener: (message: InspectorNotification<Runtime.InspectRequestedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger.
+         */
+        once(event: "Debugger.scriptParsed", listener: (message: InspectorNotification<Debugger.ScriptParsedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine fails to parse the script.
+         */
+        once(event: "Debugger.scriptFailedToParse", listener: (message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>) => void): this;
+        /**
+         * Fired when breakpoint is resolved to an actual script and location.
+         */
+        once(event: "Debugger.breakpointResolved", listener: (message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
+         */
+        once(event: "Debugger.paused", listener: (message: InspectorNotification<Debugger.PausedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine resumed execution.
+         */
+        once(event: "Debugger.resumed", listener: () => void): this;
+        /**
+         * Issued when new console message is added.
+         */
+        once(event: "Console.messageAdded", listener: (message: InspectorNotification<Console.MessageAddedEventDataType>) => void): this;
+        /**
+         * Sent when new profile recording is started using console.profile() call.
+         */
+        once(event: "Profiler.consoleProfileStarted", listener: (message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>) => void): this;
+        once(event: "Profiler.consoleProfileFinished", listener: (message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>) => void): this;
+        once(event: "HeapProfiler.addHeapSnapshotChunk", listener: (message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>) => void): this;
+        once(event: "HeapProfiler.resetProfiles", listener: () => void): this;
+        once(event: "HeapProfiler.reportHeapSnapshotProgress", listener: (message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend regularly sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
+         */
+        once(event: "HeapProfiler.lastSeenObjectId", listener: (message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend may send update for one or more fragments
+         */
+        once(event: "HeapProfiler.heapStatsUpdate", listener: (message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>) => void): this;
+        /**
+         * Fired when page is about to send HTTP request.
+         */
+        once(event: "Network.requestWillBeSent", listener: (message: InspectorNotification<Network.RequestWillBeSentEventDataType>) => void): this;
+        /**
+         * Fired when HTTP response is available.
+         */
+        once(event: "Network.responseReceived", listener: (message: InspectorNotification<Network.ResponseReceivedEventDataType>) => void): this;
+        once(event: "Network.loadingFailed", listener: (message: InspectorNotification<Network.LoadingFailedEventDataType>) => void): this;
+        once(event: "Network.loadingFinished", listener: (message: InspectorNotification<Network.LoadingFinishedEventDataType>) => void): this;
+        /**
+         * Fired when data chunk was received over the network.
+         */
+        once(event: "Network.dataReceived", listener: (message: InspectorNotification<Network.DataReceivedEventDataType>) => void): this;
+        /**
+         * Fired upon WebSocket creation.
+         */
+        once(event: "Network.webSocketCreated", listener: (message: InspectorNotification<Network.WebSocketCreatedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket is closed.
+         */
+        once(event: "Network.webSocketClosed", listener: (message: InspectorNotification<Network.WebSocketClosedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket handshake response becomes available.
+         */
+        once(event: "Network.webSocketHandshakeResponseReceived", listener: (message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>) => void): this;
+        /**
+         * This event is fired instead of `Runtime.executionContextDestroyed` when
+         * enabled.
+         * It is fired when the Node process finished all code execution and is
+         * waiting for all frontends to disconnect.
+         */
+        once(event: "NodeRuntime.waitingForDisconnect", listener: () => void): this;
+        /**
+         * This event is fired when the runtime is waiting for the debugger. For
+         * example, when inspector.waitingForDebugger is called
+         */
+        once(event: "NodeRuntime.waitingForDebugger", listener: () => void): this;
+        /**
+         * Contains an bucket of collected trace events.
+         */
+        once(event: "NodeTracing.dataCollected", listener: (message: InspectorNotification<NodeTracing.DataCollectedEventDataType>) => void): this;
+        /**
+         * Signals that tracing is stopped and there is no trace buffers pending flush, all data were
+         * delivered via dataCollected events.
+         */
+        once(event: "NodeTracing.tracingComplete", listener: () => void): this;
+        /**
+         * Issued when attached to a worker.
+         */
+        once(event: "NodeWorker.attachedToWorker", listener: (message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>) => void): this;
+        /**
+         * Issued when detached from the worker.
+         */
+        once(event: "NodeWorker.detachedFromWorker", listener: (message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>) => void): this;
+        /**
+         * Notifies about a new protocol message received from the session
+         * (session ID is provided in attachedToWorker notification).
+         */
+        once(event: "NodeWorker.receivedMessageFromWorker", listener: (message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>) => void): this;
+        once(event: "Target.targetCreated", listener: (message: InspectorNotification<Target.TargetCreatedEventDataType>) => void): this;
+        once(event: "Target.attachedToTarget", listener: (message: InspectorNotification<Target.AttachedToTargetEventDataType>) => void): this;
+        once(event: "DOMStorage.domStorageItemAdded", listener: (message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>) => void): this;
+        once(event: "DOMStorage.domStorageItemRemoved", listener: (message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>) => void): this;
+        once(event: "DOMStorage.domStorageItemUpdated", listener: (message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>) => void): this;
+        once(event: "DOMStorage.domStorageItemsCleared", listener: (message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>) => void): this;
+        prependListener(event: string, listener: (...args: any[]) => void): this;
+        /**
+         * Emitted when any notification from the V8 Inspector is received.
+         */
+        prependListener(event: "inspectorNotification", listener: (message: InspectorNotification<object>) => void): this;
+        /**
+         * Issued when new execution context is created.
+         */
+        prependListener(event: "Runtime.executionContextCreated", listener: (message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>) => void): this;
+        /**
+         * Issued when execution context is destroyed.
+         */
+        prependListener(event: "Runtime.executionContextDestroyed", listener: (message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>) => void): this;
+        /**
+         * Issued when all executionContexts were cleared in browser
+         */
+        prependListener(event: "Runtime.executionContextsCleared", listener: () => void): this;
+        /**
+         * Issued when exception was thrown and unhandled.
+         */
+        prependListener(event: "Runtime.exceptionThrown", listener: (message: InspectorNotification<Runtime.ExceptionThrownEventDataType>) => void): this;
+        /**
+         * Issued when unhandled exception was revoked.
+         */
+        prependListener(event: "Runtime.exceptionRevoked", listener: (message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>) => void): this;
+        /**
+         * Issued when console API was called.
+         */
+        prependListener(event: "Runtime.consoleAPICalled", listener: (message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>) => void): this;
+        /**
+         * Issued when object should be inspected (for example, as a result of inspect() command line API call).
+         */
+        prependListener(event: "Runtime.inspectRequested", listener: (message: InspectorNotification<Runtime.InspectRequestedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger.
+         */
+        prependListener(event: "Debugger.scriptParsed", listener: (message: InspectorNotification<Debugger.ScriptParsedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine fails to parse the script.
+         */
+        prependListener(event: "Debugger.scriptFailedToParse", listener: (message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>) => void): this;
+        /**
+         * Fired when breakpoint is resolved to an actual script and location.
+         */
+        prependListener(event: "Debugger.breakpointResolved", listener: (message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
+         */
+        prependListener(event: "Debugger.paused", listener: (message: InspectorNotification<Debugger.PausedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine resumed execution.
+         */
+        prependListener(event: "Debugger.resumed", listener: () => void): this;
+        /**
+         * Issued when new console message is added.
+         */
+        prependListener(event: "Console.messageAdded", listener: (message: InspectorNotification<Console.MessageAddedEventDataType>) => void): this;
+        /**
+         * Sent when new profile recording is started using console.profile() call.
+         */
+        prependListener(event: "Profiler.consoleProfileStarted", listener: (message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>) => void): this;
+        prependListener(event: "Profiler.consoleProfileFinished", listener: (message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>) => void): this;
+        prependListener(event: "HeapProfiler.addHeapSnapshotChunk", listener: (message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>) => void): this;
+        prependListener(event: "HeapProfiler.resetProfiles", listener: () => void): this;
+        prependListener(event: "HeapProfiler.reportHeapSnapshotProgress", listener: (message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend regularly sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
+         */
+        prependListener(event: "HeapProfiler.lastSeenObjectId", listener: (message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend may send update for one or more fragments
+         */
+        prependListener(event: "HeapProfiler.heapStatsUpdate", listener: (message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>) => void): this;
+        /**
+         * Fired when page is about to send HTTP request.
+         */
+        prependListener(event: "Network.requestWillBeSent", listener: (message: InspectorNotification<Network.RequestWillBeSentEventDataType>) => void): this;
+        /**
+         * Fired when HTTP response is available.
+         */
+        prependListener(event: "Network.responseReceived", listener: (message: InspectorNotification<Network.ResponseReceivedEventDataType>) => void): this;
+        prependListener(event: "Network.loadingFailed", listener: (message: InspectorNotification<Network.LoadingFailedEventDataType>) => void): this;
+        prependListener(event: "Network.loadingFinished", listener: (message: InspectorNotification<Network.LoadingFinishedEventDataType>) => void): this;
+        /**
+         * Fired when data chunk was received over the network.
+         */
+        prependListener(event: "Network.dataReceived", listener: (message: InspectorNotification<Network.DataReceivedEventDataType>) => void): this;
+        /**
+         * Fired upon WebSocket creation.
+         */
+        prependListener(event: "Network.webSocketCreated", listener: (message: InspectorNotification<Network.WebSocketCreatedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket is closed.
+         */
+        prependListener(event: "Network.webSocketClosed", listener: (message: InspectorNotification<Network.WebSocketClosedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket handshake response becomes available.
+         */
+        prependListener(event: "Network.webSocketHandshakeResponseReceived", listener: (message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>) => void): this;
+        /**
+         * This event is fired instead of `Runtime.executionContextDestroyed` when
+         * enabled.
+         * It is fired when the Node process finished all code execution and is
+         * waiting for all frontends to disconnect.
+         */
+        prependListener(event: "NodeRuntime.waitingForDisconnect", listener: () => void): this;
+        /**
+         * This event is fired when the runtime is waiting for the debugger. For
+         * example, when inspector.waitingForDebugger is called
+         */
+        prependListener(event: "NodeRuntime.waitingForDebugger", listener: () => void): this;
+        /**
+         * Contains an bucket of collected trace events.
+         */
+        prependListener(event: "NodeTracing.dataCollected", listener: (message: InspectorNotification<NodeTracing.DataCollectedEventDataType>) => void): this;
+        /**
+         * Signals that tracing is stopped and there is no trace buffers pending flush, all data were
+         * delivered via dataCollected events.
+         */
+        prependListener(event: "NodeTracing.tracingComplete", listener: () => void): this;
+        /**
+         * Issued when attached to a worker.
+         */
+        prependListener(event: "NodeWorker.attachedToWorker", listener: (message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>) => void): this;
+        /**
+         * Issued when detached from the worker.
+         */
+        prependListener(event: "NodeWorker.detachedFromWorker", listener: (message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>) => void): this;
+        /**
+         * Notifies about a new protocol message received from the session
+         * (session ID is provided in attachedToWorker notification).
+         */
+        prependListener(event: "NodeWorker.receivedMessageFromWorker", listener: (message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>) => void): this;
+        prependListener(event: "Target.targetCreated", listener: (message: InspectorNotification<Target.TargetCreatedEventDataType>) => void): this;
+        prependListener(event: "Target.attachedToTarget", listener: (message: InspectorNotification<Target.AttachedToTargetEventDataType>) => void): this;
+        prependListener(event: "DOMStorage.domStorageItemAdded", listener: (message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>) => void): this;
+        prependListener(event: "DOMStorage.domStorageItemRemoved", listener: (message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>) => void): this;
+        prependListener(event: "DOMStorage.domStorageItemUpdated", listener: (message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>) => void): this;
+        prependListener(event: "DOMStorage.domStorageItemsCleared", listener: (message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>) => void): this;
+        prependOnceListener(event: string, listener: (...args: any[]) => void): this;
+        /**
+         * Emitted when any notification from the V8 Inspector is received.
+         */
+        prependOnceListener(event: "inspectorNotification", listener: (message: InspectorNotification<object>) => void): this;
+        /**
+         * Issued when new execution context is created.
+         */
+        prependOnceListener(event: "Runtime.executionContextCreated", listener: (message: InspectorNotification<Runtime.ExecutionContextCreatedEventDataType>) => void): this;
+        /**
+         * Issued when execution context is destroyed.
+         */
+        prependOnceListener(event: "Runtime.executionContextDestroyed", listener: (message: InspectorNotification<Runtime.ExecutionContextDestroyedEventDataType>) => void): this;
+        /**
+         * Issued when all executionContexts were cleared in browser
+         */
+        prependOnceListener(event: "Runtime.executionContextsCleared", listener: () => void): this;
+        /**
+         * Issued when exception was thrown and unhandled.
+         */
+        prependOnceListener(event: "Runtime.exceptionThrown", listener: (message: InspectorNotification<Runtime.ExceptionThrownEventDataType>) => void): this;
+        /**
+         * Issued when unhandled exception was revoked.
+         */
+        prependOnceListener(event: "Runtime.exceptionRevoked", listener: (message: InspectorNotification<Runtime.ExceptionRevokedEventDataType>) => void): this;
+        /**
+         * Issued when console API was called.
+         */
+        prependOnceListener(event: "Runtime.consoleAPICalled", listener: (message: InspectorNotification<Runtime.ConsoleAPICalledEventDataType>) => void): this;
+        /**
+         * Issued when object should be inspected (for example, as a result of inspect() command line API call).
+         */
+        prependOnceListener(event: "Runtime.inspectRequested", listener: (message: InspectorNotification<Runtime.InspectRequestedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine parses script. This event is also fired for all known and uncollected scripts upon enabling debugger.
+         */
+        prependOnceListener(event: "Debugger.scriptParsed", listener: (message: InspectorNotification<Debugger.ScriptParsedEventDataType>) => void): this;
+        /**
+         * Fired when virtual machine fails to parse the script.
+         */
+        prependOnceListener(event: "Debugger.scriptFailedToParse", listener: (message: InspectorNotification<Debugger.ScriptFailedToParseEventDataType>) => void): this;
+        /**
+         * Fired when breakpoint is resolved to an actual script and location.
+         */
+        prependOnceListener(event: "Debugger.breakpointResolved", listener: (message: InspectorNotification<Debugger.BreakpointResolvedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine stopped on breakpoint or exception or any other stop criteria.
+         */
+        prependOnceListener(event: "Debugger.paused", listener: (message: InspectorNotification<Debugger.PausedEventDataType>) => void): this;
+        /**
+         * Fired when the virtual machine resumed execution.
+         */
+        prependOnceListener(event: "Debugger.resumed", listener: () => void): this;
+        /**
+         * Issued when new console message is added.
+         */
+        prependOnceListener(event: "Console.messageAdded", listener: (message: InspectorNotification<Console.MessageAddedEventDataType>) => void): this;
+        /**
+         * Sent when new profile recording is started using console.profile() call.
+         */
+        prependOnceListener(event: "Profiler.consoleProfileStarted", listener: (message: InspectorNotification<Profiler.ConsoleProfileStartedEventDataType>) => void): this;
+        prependOnceListener(event: "Profiler.consoleProfileFinished", listener: (message: InspectorNotification<Profiler.ConsoleProfileFinishedEventDataType>) => void): this;
+        prependOnceListener(event: "HeapProfiler.addHeapSnapshotChunk", listener: (message: InspectorNotification<HeapProfiler.AddHeapSnapshotChunkEventDataType>) => void): this;
+        prependOnceListener(event: "HeapProfiler.resetProfiles", listener: () => void): this;
+        prependOnceListener(event: "HeapProfiler.reportHeapSnapshotProgress", listener: (message: InspectorNotification<HeapProfiler.ReportHeapSnapshotProgressEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend regularly sends a current value for last seen object id and corresponding timestamp. If the were changes in the heap since last event then one or more heapStatsUpdate events will be sent before a new lastSeenObjectId event.
+         */
+        prependOnceListener(event: "HeapProfiler.lastSeenObjectId", listener: (message: InspectorNotification<HeapProfiler.LastSeenObjectIdEventDataType>) => void): this;
+        /**
+         * If heap objects tracking has been started then backend may send update for one or more fragments
+         */
+        prependOnceListener(event: "HeapProfiler.heapStatsUpdate", listener: (message: InspectorNotification<HeapProfiler.HeapStatsUpdateEventDataType>) => void): this;
+        /**
+         * Fired when page is about to send HTTP request.
+         */
+        prependOnceListener(event: "Network.requestWillBeSent", listener: (message: InspectorNotification<Network.RequestWillBeSentEventDataType>) => void): this;
+        /**
+         * Fired when HTTP response is available.
+         */
+        prependOnceListener(event: "Network.responseReceived", listener: (message: InspectorNotification<Network.ResponseReceivedEventDataType>) => void): this;
+        prependOnceListener(event: "Network.loadingFailed", listener: (message: InspectorNotification<Network.LoadingFailedEventDataType>) => void): this;
+        prependOnceListener(event: "Network.loadingFinished", listener: (message: InspectorNotification<Network.LoadingFinishedEventDataType>) => void): this;
+        /**
+         * Fired when data chunk was received over the network.
+         */
+        prependOnceListener(event: "Network.dataReceived", listener: (message: InspectorNotification<Network.DataReceivedEventDataType>) => void): this;
+        /**
+         * Fired upon WebSocket creation.
+         */
+        prependOnceListener(event: "Network.webSocketCreated", listener: (message: InspectorNotification<Network.WebSocketCreatedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket is closed.
+         */
+        prependOnceListener(event: "Network.webSocketClosed", listener: (message: InspectorNotification<Network.WebSocketClosedEventDataType>) => void): this;
+        /**
+         * Fired when WebSocket handshake response becomes available.
+         */
+        prependOnceListener(event: "Network.webSocketHandshakeResponseReceived", listener: (message: InspectorNotification<Network.WebSocketHandshakeResponseReceivedEventDataType>) => void): this;
+        /**
+         * This event is fired instead of `Runtime.executionContextDestroyed` when
+         * enabled.
+         * It is fired when the Node process finished all code execution and is
+         * waiting for all frontends to disconnect.
+         */
+        prependOnceListener(event: "NodeRuntime.waitingForDisconnect", listener: () => void): this;
+        /**
+         * This event is fired when the runtime is waiting for the debugger. For
+         * example, when inspector.waitingForDebugger is called
+         */
+        prependOnceListener(event: "NodeRuntime.waitingForDebugger", listener: () => void): this;
+        /**
+         * Contains an bucket of collected trace events.
+         */
+        prependOnceListener(event: "NodeTracing.dataCollected", listener: (message: InspectorNotification<NodeTracing.DataCollectedEventDataType>) => void): this;
+        /**
+         * Signals that tracing is stopped and there is no trace buffers pending flush, all data were
+         * delivered via dataCollected events.
+         */
+        prependOnceListener(event: "NodeTracing.tracingComplete", listener: () => void): this;
+        /**
+         * Issued when attached to a worker.
+         */
+        prependOnceListener(event: "NodeWorker.attachedToWorker", listener: (message: InspectorNotification<NodeWorker.AttachedToWorkerEventDataType>) => void): this;
+        /**
+         * Issued when detached from the worker.
+         */
+        prependOnceListener(event: "NodeWorker.detachedFromWorker", listener: (message: InspectorNotification<NodeWorker.DetachedFromWorkerEventDataType>) => void): this;
+        /**
+         * Notifies about a new protocol message received from the session
+         * (session ID is provided in attachedToWorker notification).
+         */
+        prependOnceListener(event: "NodeWorker.receivedMessageFromWorker", listener: (message: InspectorNotification<NodeWorker.ReceivedMessageFromWorkerEventDataType>) => void): this;
+        prependOnceListener(event: "Target.targetCreated", listener: (message: InspectorNotification<Target.TargetCreatedEventDataType>) => void): this;
+        prependOnceListener(event: "Target.attachedToTarget", listener: (message: InspectorNotification<Target.AttachedToTargetEventDataType>) => void): this;
+        prependOnceListener(event: "DOMStorage.domStorageItemAdded", listener: (message: InspectorNotification<DOMStorage.DomStorageItemAddedEventDataType>) => void): this;
+        prependOnceListener(event: "DOMStorage.domStorageItemRemoved", listener: (message: InspectorNotification<DOMStorage.DomStorageItemRemovedEventDataType>) => void): this;
+        prependOnceListener(event: "DOMStorage.domStorageItemUpdated", listener: (message: InspectorNotification<DOMStorage.DomStorageItemUpdatedEventDataType>) => void): this;
+        prependOnceListener(event: "DOMStorage.domStorageItemsCleared", listener: (message: InspectorNotification<DOMStorage.DomStorageItemsClearedEventDataType>) => void): this;
+    }
+}
diff --git a/mqtt-backend/node_modules/@types/node/inspector/promises.d.ts b/mqtt-backend/node_modules/@types/node/inspector/promises.d.ts
new file mode 100644
index 0000000..e75ff20
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/inspector/promises.d.ts
@@ -0,0 +1,35 @@
+declare module "node:inspector/promises" {
+    import { EventEmitter } from "node:events";
+    export { close, console, NetworkResources, open, url, waitForDebugger } from "node:inspector";
+    /**
+     * The `inspector.Session` is used for dispatching messages to the V8 inspector
+     * back-end and receiving message responses and notifications.
+     * @since v19.0.0
+     */
+    export class Session extends EventEmitter {
+        /**
+         * Create a new instance of the inspector.Session class.
+         * The inspector session needs to be connected through `session.connect()` before the messages can be dispatched to the inspector backend.
+         */
+        constructor();
+        /**
+         * Connects a session to the inspector back-end.
+         */
+        connect(): void;
+        /**
+         * Connects a session to the inspector back-end.
+         * An exception will be thrown if this API was not called on a Worker thread.
+         * @since v12.11.0
+         */
+        connectToMainThread(): void;
+        /**
+         * Immediately close the session. All pending message callbacks will be called with an error.
+         * `session.connect()` will need to be called to be able to send messages again.
+         * Reconnected session will lose all inspector state, such as enabled agents or configured breakpoints.
+         */
+        disconnect(): void;
+    }
+}
+declare module "inspector/promises" {
+    export * from "node:inspector/promises";
+}
diff --git a/mqtt-backend/node_modules/@types/node/module.d.ts b/mqtt-backend/node_modules/@types/node/module.d.ts
new file mode 100644
index 0000000..7f61a67
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/module.d.ts
@@ -0,0 +1,754 @@
+declare module "node:module" {
+    import { URL } from "node:url";
+    class Module {
+        constructor(id: string, parent?: Module);
+    }
+    interface Module extends NodeJS.Module {}
+    namespace Module {
+        export { Module };
+    }
+    namespace Module {
+        /**
+         * A list of the names of all modules provided by Node.js. Can be used to verify
+         * if a module is maintained by a third party or not.
+         *
+         * Note: the list doesn't contain prefix-only modules like `node:test`.
+         * @since v9.3.0, v8.10.0, v6.13.0
+         */
+        const builtinModules: readonly string[];
+        /**
+         * @since v12.2.0
+         * @param path Filename to be used to construct the require
+         * function. Must be a file URL object, file URL string, or absolute path
+         * string.
+         */
+        function createRequire(path: string | URL): NodeJS.Require;
+        namespace constants {
+            /**
+             * The following constants are returned as the `status` field in the object returned by
+             * {@link enableCompileCache} to indicate the result of the attempt to enable the
+             * [module compile cache](https://nodejs.org/docs/latest-v25.x/api/module.html#module-compile-cache).
+             * @since v22.8.0
+             */
+            namespace compileCacheStatus {
+                /**
+                 * Node.js has enabled the compile cache successfully. The directory used to store the
+                 * compile cache will be returned in the `directory` field in the
+                 * returned object.
+                 */
+                const ENABLED: number;
+                /**
+                 * The compile cache has already been enabled before, either by a previous call to
+                 * {@link enableCompileCache}, or by the `NODE_COMPILE_CACHE=dir`
+                 * environment variable. The directory used to store the
+                 * compile cache will be returned in the `directory` field in the
+                 * returned object.
+                 */
+                const ALREADY_ENABLED: number;
+                /**
+                 * Node.js fails to enable the compile cache. This can be caused by the lack of
+                 * permission to use the specified directory, or various kinds of file system errors.
+                 * The detail of the failure will be returned in the `message` field in the
+                 * returned object.
+                 */
+                const FAILED: number;
+                /**
+                 * Node.js cannot enable the compile cache because the environment variable
+                 * `NODE_DISABLE_COMPILE_CACHE=1` has been set.
+                 */
+                const DISABLED: number;
+            }
+        }
+        interface EnableCompileCacheOptions {
+            /**
+             * Optional. Directory to store the compile cache. If not specified,
+             * the directory specified by the `NODE_COMPILE_CACHE=dir` environment variable
+             * will be used if it's set, or `path.join(os.tmpdir(), 'node-compile-cache')`
+             * otherwise.
+             * @since v25.0.0
+             */
+            directory?: string | undefined;
+            /**
+             * Optional. If `true`, enables portable compile cache so that
+             * the cache can be reused even if the project directory is moved. This is a best-effort
+             * feature. If not specified, it will depend on whether the environment variable
+             * `NODE_COMPILE_CACHE_PORTABLE=1` is set.
+             * @since v25.0.0
+             */
+            portable?: boolean | undefined;
+        }
+        interface EnableCompileCacheResult {
+            /**
+             * One of the {@link constants.compileCacheStatus}
+             */
+            status: number;
+            /**
+             * If Node.js cannot enable the compile cache, this contains
+             * the error message. Only set if `status` is `module.constants.compileCacheStatus.FAILED`.
+             */
+            message?: string;
+            /**
+             * If the compile cache is enabled, this contains the directory
+             * where the compile cache is stored. Only set if  `status` is
+             * `module.constants.compileCacheStatus.ENABLED` or
+             * `module.constants.compileCacheStatus.ALREADY_ENABLED`.
+             */
+            directory?: string;
+        }
+        /**
+         * Enable [module compile cache](https://nodejs.org/docs/latest-v25.x/api/module.html#module-compile-cache)
+         * in the current Node.js instance.
+         *
+         * For general use cases, it's recommended to call `module.enableCompileCache()` without
+         * specifying the `options.directory`, so that the directory can be overridden by the
+         * `NODE_COMPILE_CACHE` environment variable when necessary.
+         *
+         * Since compile cache is supposed to be a optimization that is not mission critical, this
+         * method is designed to not throw any exception when the compile cache cannot be enabled.
+         * Instead, it will return an object containing an error message in the `message` field to
+         * aid debugging. If compile cache is enabled successfully, the `directory` field in the
+         * returned object contains the path to the directory where the compile cache is stored. The
+         * `status` field in the returned object would be one of the `module.constants.compileCacheStatus`
+         * values to indicate the result of the attempt to enable the
+         * [module compile cache](https://nodejs.org/docs/latest-v25.x/api/module.html#module-compile-cache).
+         *
+         * This method only affects the current Node.js instance. To enable it in child worker threads,
+         * either call this method in child worker threads too, or set the
+         * `process.env.NODE_COMPILE_CACHE` value to compile cache directory so the behavior can
+         * be inherited into the child workers. The directory can be obtained either from the
+         * `directory` field returned by this method, or with {@link getCompileCacheDir}.
+         * @since v22.8.0
+         * @param options Optional. If a string is passed, it is considered to be `options.directory`.
+         */
+        function enableCompileCache(options?: string | EnableCompileCacheOptions): EnableCompileCacheResult;
+        /**
+         * Flush the [module compile cache](https://nodejs.org/docs/latest-v25.x/api/module.html#module-compile-cache)
+         * accumulated from modules already loaded
+         * in the current Node.js instance to disk. This returns after all the flushing
+         * file system operations come to an end, no matter they succeed or not. If there
+         * are any errors, this will fail silently, since compile cache misses should not
+         * interfere with the actual operation of the application.
+         * @since v22.10.0
+         */
+        function flushCompileCache(): void;
+        /**
+         * @since v22.8.0
+         * @return Path to the [module compile cache](https://nodejs.org/docs/latest-v25.x/api/module.html#module-compile-cache)
+         * directory if it is enabled, or `undefined` otherwise.
+         */
+        function getCompileCacheDir(): string | undefined;
+        /**
+         * ```text
+         * /path/to/project
+         *   ├ packages/
+         *     ├ bar/
+         *       ├ bar.js
+         *       └ package.json // name = '@foo/bar'
+         *     └ qux/
+         *       ├ node_modules/
+         *         └ some-package/
+         *           └ package.json // name = 'some-package'
+         *       ├ qux.js
+         *       └ package.json // name = '@foo/qux'
+         *   ├ main.js
+         *   └ package.json // name = '@foo'
+         * ```
+         * ```js
+         * // /path/to/project/packages/bar/bar.js
+         * import { findPackageJSON } from 'node:module';
+         *
+         * findPackageJSON('..', import.meta.url);
+         * // '/path/to/project/package.json'
+         * // Same result when passing an absolute specifier instead:
+         * findPackageJSON(new URL('../', import.meta.url));
+         * findPackageJSON(import.meta.resolve('../'));
+         *
+         * findPackageJSON('some-package', import.meta.url);
+         * // '/path/to/project/packages/bar/node_modules/some-package/package.json'
+         * // When passing an absolute specifier, you might get a different result if the
+         * // resolved module is inside a subfolder that has nested `package.json`.
+         * findPackageJSON(import.meta.resolve('some-package'));
+         * // '/path/to/project/packages/bar/node_modules/some-package/some-subfolder/package.json'
+         *
+         * findPackageJSON('@foo/qux', import.meta.url);
+         * // '/path/to/project/packages/qux/package.json'
+         * ```
+         * @since v22.14.0
+         * @param specifier The specifier for the module whose `package.json` to
+         * retrieve. When passing a _bare specifier_, the `package.json` at the root of
+         * the package is returned. When passing a _relative specifier_ or an _absolute specifier_,
+         * the closest parent `package.json` is returned.
+         * @param base The absolute location (`file:` URL string or FS path) of the
+         * containing  module. For CJS, use `__filename` (not `__dirname`!); for ESM, use
+         * `import.meta.url`. You do not need to pass it if `specifier` is an _absolute specifier_.
+         * @returns A path if the `package.json` is found. When `startLocation`
+         * is a package, the package's root `package.json`; when a relative or unresolved, the closest
+         * `package.json` to the `startLocation`.
+         */
+        function findPackageJSON(specifier: string | URL, base?: string | URL): string | undefined;
+        /**
+         * @since v18.6.0, v16.17.0
+         */
+        function isBuiltin(moduleName: string): boolean;
+        interface RegisterOptions<Data> {
+            /**
+             * If you want to resolve `specifier` relative to a
+             * base URL, such as `import.meta.url`, you can pass that URL here. This
+             * property is ignored if the `parentURL` is supplied as the second argument.
+             * @default 'data:'
+             */
+            parentURL?: string | URL | undefined;
+            /**
+             * Any arbitrary, cloneable JavaScript value to pass into the
+             * {@link initialize} hook.
+             */
+            data?: Data | undefined;
+            /**
+             * [Transferable objects](https://nodejs.org/docs/latest-v25.x/api/worker_threads.html#portpostmessagevalue-transferlist)
+             * to be passed into the `initialize` hook.
+             */
+            transferList?: any[] | undefined;
+        }
+        /* eslint-disable @definitelytyped/no-unnecessary-generics */
+        /**
+         * Register a module that exports hooks that customize Node.js module
+         * resolution and loading behavior. See
+         * [Customization hooks](https://nodejs.org/docs/latest-v25.x/api/module.html#customization-hooks).
+         *
+         * This feature requires `--allow-worker` if used with the
+         * [Permission Model](https://nodejs.org/docs/latest-v25.x/api/permissions.html#permission-model).
+         * @since v20.6.0, v18.19.0
+         * @param specifier Customization hooks to be registered; this should be
+         * the same string that would be passed to `import()`, except that if it is
+         * relative, it is resolved relative to `parentURL`.
+         * @param parentURL f you want to resolve `specifier` relative to a base
+         * URL, such as `import.meta.url`, you can pass that URL here.
+         */
+        function register<Data = any>(
+            specifier: string | URL,
+            parentURL?: string | URL,
+            options?: RegisterOptions<Data>,
+        ): void;
+        function register<Data = any>(specifier: string | URL, options?: RegisterOptions<Data>): void;
+        interface RegisterHooksOptions {
+            /**
+             * See [load hook](https://nodejs.org/docs/latest-v25.x/api/module.html#loadurl-context-nextload).
+             * @default undefined
+             */
+            load?: LoadHookSync | undefined;
+            /**
+             * See [resolve hook](https://nodejs.org/docs/latest-v25.x/api/module.html#resolvespecifier-context-nextresolve).
+             * @default undefined
+             */
+            resolve?: ResolveHookSync | undefined;
+        }
+        interface ModuleHooks {
+            /**
+             * Deregister the hook instance.
+             */
+            deregister(): void;
+        }
+        /**
+         * Register [hooks](https://nodejs.org/docs/latest-v25.x/api/module.html#customization-hooks)
+         * that customize Node.js module resolution and loading behavior.
+         * @since v22.15.0
+         * @experimental
+         */
+        function registerHooks(options: RegisterHooksOptions): ModuleHooks;
+        interface StripTypeScriptTypesOptions {
+            /**
+             * Possible values are:
+             * * `'strip'` Only strip type annotations without performing the transformation of TypeScript features.
+             * * `'transform'` Strip type annotations and transform TypeScript features to JavaScript.
+             * @default 'strip'
+             */
+            mode?: "strip" | "transform" | undefined;
+            /**
+             * Only when `mode` is `'transform'`, if `true`, a source map
+             * will be generated for the transformed code.
+             * @default false
+             */
+            sourceMap?: boolean | undefined;
+            /**
+             * Specifies the source url used in the source map.
+             */
+            sourceUrl?: string | undefined;
+        }
+        /**
+         * `module.stripTypeScriptTypes()` removes type annotations from TypeScript code. It
+         * can be used to strip type annotations from TypeScript code before running it
+         * with `vm.runInContext()` or `vm.compileFunction()`.
+         * By default, it will throw an error if the code contains TypeScript features
+         * that require transformation such as `Enums`,
+         * see [type-stripping](https://nodejs.org/docs/latest-v25.x/api/typescript.md#type-stripping) for more information.
+         * When mode is `'transform'`, it also transforms TypeScript features to JavaScript,
+         * see [transform TypeScript features](https://nodejs.org/docs/latest-v25.x/api/typescript.md#typescript-features) for more information.
+         * When mode is `'strip'`, source maps are not generated, because locations are preserved.
+         * If `sourceMap` is provided, when mode is `'strip'`, an error will be thrown.
+         *
+         * _WARNING_: The output of this function should not be considered stable across Node.js versions,
+         * due to changes in the TypeScript parser.
+         *
+         * ```js
+         * import { stripTypeScriptTypes } from 'node:module';
+         * const code = 'const a: number = 1;';
+         * const strippedCode = stripTypeScriptTypes(code);
+         * console.log(strippedCode);
+         * // Prints: const a         = 1;
+         * ```
+         *
+         * If `sourceUrl` is provided, it will be used appended as a comment at the end of the output:
+         *
+         * ```js
+         * import { stripTypeScriptTypes } from 'node:module';
+         * const code = 'const a: number = 1;';
+         * const strippedCode = stripTypeScriptTypes(code, { mode: 'strip', sourceUrl: 'source.ts' });
+         * console.log(strippedCode);
+         * // Prints: const a         = 1\n\n//# sourceURL=source.ts;
+         * ```
+         *
+         * When `mode` is `'transform'`, the code is transformed to JavaScript:
+         *
+         * ```js
+         * import { stripTypeScriptTypes } from 'node:module';
+         * const code = `
+         *   namespace MathUtil {
+         *     export const add = (a: number, b: number) => a + b;
+         *   }`;
+         * const strippedCode = stripTypeScriptTypes(code, { mode: 'transform', sourceMap: true });
+         * console.log(strippedCode);
+         * // Prints:
+         * // var MathUtil;
+         * // (function(MathUtil) {
+         * //     MathUtil.add = (a, b)=>a + b;
+         * // })(MathUtil || (MathUtil = {}));
+         * // # sourceMappingURL=data:application/json;base64, ...
+         * ```
+         * @since v22.13.0
+         * @param code The code to strip type annotations from.
+         * @returns The code with type annotations stripped.
+         */
+        function stripTypeScriptTypes(code: string, options?: StripTypeScriptTypesOptions): string;
+        /* eslint-enable @definitelytyped/no-unnecessary-generics */
+        /**
+         * The `module.syncBuiltinESMExports()` method updates all the live bindings for
+         * builtin `ES Modules` to match the properties of the `CommonJS` exports. It
+         * does not add or remove exported names from the `ES Modules`.
+         *
+         * ```js
+         * import fs from 'node:fs';
+         * import assert from 'node:assert';
+         * import { syncBuiltinESMExports } from 'node:module';
+         *
+         * fs.readFile = newAPI;
+         *
+         * delete fs.readFileSync;
+         *
+         * function newAPI() {
+         *   // ...
+         * }
+         *
+         * fs.newAPI = newAPI;
+         *
+         * syncBuiltinESMExports();
+         *
+         * import('node:fs').then((esmFS) => {
+         *   // It syncs the existing readFile property with the new value
+         *   assert.strictEqual(esmFS.readFile, newAPI);
+         *   // readFileSync has been deleted from the required fs
+         *   assert.strictEqual('readFileSync' in fs, false);
+         *   // syncBuiltinESMExports() does not remove readFileSync from esmFS
+         *   assert.strictEqual('readFileSync' in esmFS, true);
+         *   // syncBuiltinESMExports() does not add names
+         *   assert.strictEqual(esmFS.newAPI, undefined);
+         * });
+         * ```
+         * @since v12.12.0
+         */
+        function syncBuiltinESMExports(): void;
+        interface ImportAttributes extends NodeJS.Dict<string> {
+            type?: string | undefined;
+        }
+        type ImportPhase = "source" | "evaluation";
+        type ModuleFormat =
+            | "addon"
+            | "builtin"
+            | "commonjs"
+            | "commonjs-typescript"
+            | "json"
+            | "module"
+            | "module-typescript"
+            | "wasm";
+        type ModuleSource = string | ArrayBuffer | NodeJS.TypedArray;
+        type InitializeHook<Data = any> = (data: Data) => void | Promise<void>;
+        interface ResolveHookContext {
+            conditions: string[];
+            importAttributes: ImportAttributes;
+            parentURL: string | undefined;
+        }
+        interface ResolveFnOutput {
+            format?: string | null | undefined;
+            importAttributes?: ImportAttributes | undefined;
+            shortCircuit?: boolean | undefined;
+            url: string;
+        }
+        type ResolveHook = (
+            specifier: string,
+            context: ResolveHookContext,
+            nextResolve: (
+                specifier: string,
+                context?: Partial<ResolveHookContext>,
+            ) => ResolveFnOutput | Promise<ResolveFnOutput>,
+        ) => ResolveFnOutput | Promise<ResolveFnOutput>;
+        type ResolveHookSync = (
+            specifier: string,
+            context: ResolveHookContext,
+            nextResolve: (
+                specifier: string,
+                context?: Partial<ResolveHookContext>,
+            ) => ResolveFnOutput,
+        ) => ResolveFnOutput;
+        interface LoadHookContext {
+            conditions: string[];
+            format: string | null | undefined;
+            importAttributes: ImportAttributes;
+        }
+        interface LoadFnOutput {
+            format: string | null | undefined;
+            shortCircuit?: boolean | undefined;
+            source?: ModuleSource | undefined;
+        }
+        type LoadHook = (
+            url: string,
+            context: LoadHookContext,
+            nextLoad: (
+                url: string,
+                context?: Partial<LoadHookContext>,
+            ) => LoadFnOutput | Promise<LoadFnOutput>,
+        ) => LoadFnOutput | Promise<LoadFnOutput>;
+        type LoadHookSync = (
+            url: string,
+            context: LoadHookContext,
+            nextLoad: (
+                url: string,
+                context?: Partial<LoadHookContext>,
+            ) => LoadFnOutput,
+        ) => LoadFnOutput;
+        interface SourceMapsSupport {
+            /**
+             * If the source maps support is enabled
+             */
+            enabled: boolean;
+            /**
+             * If the support is enabled for files in `node_modules`.
+             */
+            nodeModules: boolean;
+            /**
+             * If the support is enabled for generated code from `eval` or `new Function`.
+             */
+            generatedCode: boolean;
+        }
+        /**
+         * This method returns whether the [Source Map v3](https://tc39.es/ecma426/) support for stack
+         * traces is enabled.
+         * @since v23.7.0, v22.14.0
+         */
+        function getSourceMapsSupport(): SourceMapsSupport;
+        /**
+         * `path` is the resolved path for the file for which a corresponding source map
+         * should be fetched.
+         * @since v13.7.0, v12.17.0
+         * @return Returns `module.SourceMap` if a source map is found, `undefined` otherwise.
+         */
+        function findSourceMap(path: string): SourceMap | undefined;
+        interface SetSourceMapsSupportOptions {
+            /**
+             * If enabling the support for files in `node_modules`.
+             * @default false
+             */
+            nodeModules?: boolean | undefined;
+            /**
+             * If enabling the support for generated code from `eval` or `new Function`.
+             * @default false
+             */
+            generatedCode?: boolean | undefined;
+        }
+        /**
+         * This function enables or disables the [Source Map v3](https://tc39.es/ecma426/) support for
+         * stack traces.
+         *
+         * It provides same features as launching Node.js process with commandline options
+         * `--enable-source-maps`, with additional options to alter the support for files
+         * in `node_modules` or generated codes.
+         *
+         * Only source maps in JavaScript files that are loaded after source maps has been
+         * enabled will be parsed and loaded. Preferably, use the commandline options
+         * `--enable-source-maps` to avoid losing track of source maps of modules loaded
+         * before this API call.
+         * @since v23.7.0, v22.14.0
+         */
+        function setSourceMapsSupport(enabled: boolean, options?: SetSourceMapsSupportOptions): void;
+        interface SourceMapConstructorOptions {
+            /**
+             * @since v21.0.0, v20.5.0
+             */
+            lineLengths?: readonly number[] | undefined;
+        }
+        interface SourceMapPayload {
+            file: string;
+            version: number;
+            sources: string[];
+            sourcesContent: string[];
+            names: string[];
+            mappings: string;
+            sourceRoot: string;
+        }
+        interface SourceMapping {
+            generatedLine: number;
+            generatedColumn: number;
+            originalSource: string;
+            originalLine: number;
+            originalColumn: number;
+        }
+        interface SourceOrigin {
+            /**
+             * The name of the range in the source map, if one was provided
+             */
+            name: string | undefined;
+            /**
+             * The file name of the original source, as reported in the SourceMap
+             */
+            fileName: string;
+            /**
+             * The 1-indexed lineNumber of the corresponding call site in the original source
+             */
+            lineNumber: number;
+            /**
+             * The 1-indexed columnNumber of the corresponding call site in the original source
+             */
+            columnNumber: number;
+        }
+        /**
+         * @since v13.7.0, v12.17.0
+         */
+        class SourceMap {
+            constructor(payload: SourceMapPayload, options?: SourceMapConstructorOptions);
+            /**
+             * Getter for the payload used to construct the `SourceMap` instance.
+             */
+            readonly payload: SourceMapPayload;
+            /**
+             * Given a line offset and column offset in the generated source
+             * file, returns an object representing the SourceMap range in the
+             * original file if found, or an empty object if not.
+             *
+             * The object returned contains the following keys:
+             *
+             * The returned value represents the raw range as it appears in the
+             * SourceMap, based on zero-indexed offsets, _not_ 1-indexed line and
+             * column numbers as they appear in Error messages and CallSite
+             * objects.
+             *
+             * To get the corresponding 1-indexed line and column numbers from a
+             * lineNumber and columnNumber as they are reported by Error stacks
+             * and CallSite objects, use `sourceMap.findOrigin(lineNumber, columnNumber)`
+             * @param lineOffset The zero-indexed line number offset in the generated source
+             * @param columnOffset The zero-indexed column number offset in the generated source
+             */
+            findEntry(lineOffset: number, columnOffset: number): SourceMapping | {};
+            /**
+             * Given a 1-indexed `lineNumber` and `columnNumber` from a call site in the generated source,
+             * find the corresponding call site location in the original source.
+             *
+             * If the `lineNumber` and `columnNumber` provided are not found in any source map,
+             * then an empty object is returned.
+             * @param lineNumber The 1-indexed line number of the call site in the generated source
+             * @param columnNumber The 1-indexed column number of the call site in the generated source
+             */
+            findOrigin(lineNumber: number, columnNumber: number): SourceOrigin | {};
+        }
+        function runMain(main?: string): void;
+        function wrap(script: string): string;
+    }
+    global {
+        namespace NodeJS {
+            interface Module {
+                /**
+                 * The module objects required for the first time by this one.
+                 * @since v0.1.16
+                 */
+                children: Module[];
+                /**
+                 * The `module.exports` object is created by the `Module` system. Sometimes this is
+                 * not acceptable; many want their module to be an instance of some class. To do
+                 * this, assign the desired export object to `module.exports`.
+                 * @since v0.1.16
+                 */
+                exports: any;
+                /**
+                 * The fully resolved filename of the module.
+                 * @since v0.1.16
+                 */
+                filename: string;
+                /**
+                 * The identifier for the module. Typically this is the fully resolved
+                 * filename.
+                 * @since v0.1.16
+                 */
+                id: string;
+                /**
+                 * `true` if the module is running during the Node.js preload
+                 * phase.
+                 * @since v15.4.0, v14.17.0
+                 */
+                isPreloading: boolean;
+                /**
+                 * Whether or not the module is done loading, or is in the process of
+                 * loading.
+                 * @since v0.1.16
+                 */
+                loaded: boolean;
+                /**
+                 * The module that first required this one, or `null` if the current module is the
+                 * entry point of the current process, or `undefined` if the module was loaded by
+                 * something that is not a CommonJS module (e.g. REPL or `import`).
+                 * @since v0.1.16
+                 * @deprecated Please use `require.main` and `module.children` instead.
+                 */
+                parent: Module | null | undefined;
+                /**
+                 * The directory name of the module. This is usually the same as the
+                 * `path.dirname()` of the `module.id`.
+                 * @since v11.14.0
+                 */
+                path: string;
+                /**
+                 * The search paths for the module.
+                 * @since v0.4.0
+                 */
+                paths: string[];
+                /**
+                 * The `module.require()` method provides a way to load a module as if
+                 * `require()` was called from the original module.
+                 * @since v0.5.1
+                 */
+                require(id: string): any;
+            }
+            interface Require {
+                /**
+                 * Used to import modules, `JSON`, and local files.
+                 * @since v0.1.13
+                 */
+                (id: string): any;
+                /**
+                 * Modules are cached in this object when they are required. By deleting a key
+                 * value from this object, the next `require` will reload the module.
+                 * This does not apply to
+                 * [native addons](https://nodejs.org/docs/latest-v25.x/api/addons.html),
+                 * for which reloading will result in an error.
+                 * @since v0.3.0
+                 */
+                cache: Dict<Module>;
+                /**
+                 * Instruct `require` on how to handle certain file extensions.
+                 * @since v0.3.0
+                 * @deprecated
+                 */
+                extensions: RequireExtensions;
+                /**
+                 * The `Module` object representing the entry script loaded when the Node.js
+                 * process launched, or `undefined` if the entry point of the program is not a
+                 * CommonJS module.
+                 * @since v0.1.17
+                 */
+                main: Module | undefined;
+                /**
+                 * @since v0.3.0
+                 */
+                resolve: RequireResolve;
+            }
+            /** @deprecated */
+            interface RequireExtensions extends Dict<(module: Module, filename: string) => any> {
+                ".js": (module: Module, filename: string) => any;
+                ".json": (module: Module, filename: string) => any;
+                ".node": (module: Module, filename: string) => any;
+            }
+            interface RequireResolveOptions {
+                /**
+                 * Paths to resolve module location from. If present, these
+                 * paths are used instead of the default resolution paths, with the exception
+                 * of
+                 * [GLOBAL\_FOLDERS](https://nodejs.org/docs/latest-v25.x/api/modules.html#loading-from-the-global-folders)
+                 * like `$HOME/.node_modules`, which are
+                 * always included. Each of these paths is used as a starting point for
+                 * the module resolution algorithm, meaning that the `node_modules` hierarchy
+                 * is checked from this location.
+                 * @since v8.9.0
+                 */
+                paths?: string[] | undefined;
+            }
+            interface RequireResolve {
+                /**
+                 * Use the internal `require()` machinery to look up the location of a module,
+                 * but rather than loading the module, just return the resolved filename.
+                 *
+                 * If the module can not be found, a `MODULE_NOT_FOUND` error is thrown.
+                 * @since v0.3.0
+                 * @param request The module path to resolve.
+                 */
+                (request: string, options?: RequireResolveOptions): string;
+                /**
+                 * Returns an array containing the paths searched during resolution of `request` or
+                 * `null` if the `request` string references a core module, for example `http` or
+                 * `fs`.
+                 * @since v8.9.0
+                 * @param request The module path whose lookup paths are being retrieved.
+                 */
+                paths(request: string): string[] | null;
+            }
+        }
+        /**
+         * The directory name of the current module. This is the same as the
+         * `path.dirname()` of the `__filename`.
+         * @since v0.1.27
+         */
+        var __dirname: string;
+        /**
+         * The file name of the current module. This is the current module file's absolute
+         * path with symlinks resolved.
+         *
+         * For a main program this is not necessarily the same as the file name used in the
+         * command line.
+         * @since v0.0.1
+         */
+        var __filename: string;
+        /**
+         * The `exports` variable is available within a module's file-level scope, and is
+         * assigned the value of `module.exports` before the module is evaluated.
+         * @since v0.1.16
+         */
+        var exports: NodeJS.Module["exports"];
+        /**
+         * A reference to the current module.
+         * @since v0.1.16
+         */
+        var module: NodeJS.Module;
+        /**
+         * @since v0.1.13
+         */
+        var require: NodeJS.Require;
+        // Global-scope aliases for backwards compatibility with @types/node <13.0.x
+        // TODO: consider removing in a future major version update
+        /** @deprecated Use `NodeJS.Module` instead. */
+        interface NodeModule extends NodeJS.Module {}
+        /** @deprecated Use `NodeJS.Require` instead. */
+        interface NodeRequire extends NodeJS.Require {}
+        /** @deprecated Use `NodeJS.RequireResolve` instead. */
+        interface RequireResolve extends NodeJS.RequireResolve {}
+    }
+    export = Module;
+}
+declare module "module" {
+    import module = require("node:module");
+    export = module;
+}
diff --git a/mqtt-backend/node_modules/@types/node/net.d.ts b/mqtt-backend/node_modules/@types/node/net.d.ts
new file mode 100644
index 0000000..bb6d3a3
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/net.d.ts
@@ -0,0 +1,970 @@
+declare module "node:net" {
+    import { NonSharedBuffer } from "node:buffer";
+    import * as dns from "node:dns";
+    import { Abortable, EventEmitter, InternalEventEmitter } from "node:events";
+    import * as stream from "node:stream";
+    type LookupFunction = (
+        hostname: string,
+        options: dns.LookupOptions,
+        callback: (err: NodeJS.ErrnoException | null, address: string | dns.LookupAddress[], family?: number) => void,
+    ) => void;
+    interface AddressInfo {
+        address: string;
+        family: string;
+        port: number;
+    }
+    interface SocketConstructorOpts {
+        fd?: number | undefined;
+        allowHalfOpen?: boolean | undefined;
+        onread?: OnReadOpts | undefined;
+        readable?: boolean | undefined;
+        writable?: boolean | undefined;
+        signal?: AbortSignal | undefined;
+        noDelay?: boolean | undefined;
+        keepAlive?: boolean | undefined;
+        keepAliveInitialDelay?: number | undefined;
+        blockList?: BlockList | undefined;
+        typeOfService?: number | undefined;
+    }
+    interface OnReadOpts {
+        buffer: Uint8Array | (() => Uint8Array);
+        /**
+         * This function is called for every chunk of incoming data.
+         * Two arguments are passed to it: the number of bytes written to `buffer` and a reference to `buffer`.
+         * Return `false` from this function to implicitly `pause()` the socket.
+         */
+        callback(bytesWritten: number, buffer: Uint8Array): boolean;
+    }
+    interface TcpSocketConnectOpts {
+        port: number;
+        host?: string | undefined;
+        localAddress?: string | undefined;
+        localPort?: number | undefined;
+        hints?: number | undefined;
+        family?: number | undefined;
+        lookup?: LookupFunction | undefined;
+        /**
+         * @since v18.13.0
+         */
+        autoSelectFamily?: boolean | undefined;
+        /**
+         * @since v18.13.0
+         */
+        autoSelectFamilyAttemptTimeout?: number | undefined;
+    }
+    interface IpcSocketConnectOpts {
+        path: string;
+    }
+    type SocketConnectOpts = TcpSocketConnectOpts | IpcSocketConnectOpts;
+    type SocketReadyState = "opening" | "open" | "readOnly" | "writeOnly" | "closed";
+    interface SocketEventMap extends Omit<stream.DuplexEventMap, "close"> {
+        "close": [hadError: boolean];
+        "connect": [];
+        "connectionAttempt": [ip: string, port: number, family: number];
+        "connectionAttemptFailed": [ip: string, port: number, family: number, error: Error];
+        "connectionAttemptTimeout": [ip: string, port: number, family: number];
+        "data": [data: string | NonSharedBuffer];
+        "lookup": [err: Error | null, address: string, family: number | null, host: string];
+        "ready": [];
+        "timeout": [];
+    }
+    /**
+     * This class is an abstraction of a TCP socket or a streaming `IPC` endpoint
+     * (uses named pipes on Windows, and Unix domain sockets otherwise). It is also
+     * an `EventEmitter`.
+     *
+     * A `net.Socket` can be created by the user and used directly to interact with
+     * a server. For example, it is returned by {@link createConnection},
+     * so the user can use it to talk to the server.
+     *
+     * It can also be created by Node.js and passed to the user when a connection
+     * is received. For example, it is passed to the listeners of a `'connection'` event emitted on a {@link Server}, so the user can use
+     * it to interact with the client.
+     * @since v0.3.4
+     */
+    class Socket extends stream.Duplex {
+        constructor(options?: SocketConstructorOpts);
+        /**
+         * Destroys the socket after all data is written. If the `finish` event was already emitted the socket is destroyed immediately.
+         * If the socket is still writable it implicitly calls `socket.end()`.
+         * @since v0.3.4
+         */
+        destroySoon(): void;
+        /**
+         * Sends data on the socket. The second parameter specifies the encoding in the
+         * case of a string. It defaults to UTF8 encoding.
+         *
+         * Returns `true` if the entire data was flushed successfully to the kernel
+         * buffer. Returns `false` if all or part of the data was queued in user memory.`'drain'` will be emitted when the buffer is again free.
+         *
+         * The optional `callback` parameter will be executed when the data is finally
+         * written out, which may not be immediately.
+         *
+         * See `Writable` stream `write()` method for more
+         * information.
+         * @since v0.1.90
+         */
+        write(buffer: Uint8Array | string, cb?: (err?: Error | null) => void): boolean;
+        /**
+         * Sends data on the socket, with an explicit encoding for string data.
+         * @see {@link Socket.write} for full details.
+         * @since v0.1.90
+         * @param [encoding='utf8'] Only used when data is `string`.
+         */
+        write(str: Uint8Array | string, encoding?: BufferEncoding, cb?: (err?: Error | null) => void): boolean;
+        /**
+         * Initiate a connection on a given socket.
+         *
+         * Possible signatures:
+         *
+         * * `socket.connect(options[, connectListener])`
+         * * `socket.connect(path[, connectListener])` for `IPC` connections.
+         * * `socket.connect(port[, host][, connectListener])` for TCP connections.
+         * * Returns: `net.Socket` The socket itself.
+         *
+         * This function is asynchronous. When the connection is established, the `'connect'` event will be emitted. If there is a problem connecting,
+         * instead of a `'connect'` event, an `'error'` event will be emitted with
+         * the error passed to the `'error'` listener.
+         * The last parameter `connectListener`, if supplied, will be added as a listener
+         * for the `'connect'` event **once**.
+         *
+         * This function should only be used for reconnecting a socket after`'close'` has been emitted or otherwise it may lead to undefined
+         * behavior.
+         */
+        connect(options: SocketConnectOpts, connectionListener?: () => void): this;
+        connect(port: number, host: string, connectionListener?: () => void): this;
+        connect(port: number, connectionListener?: () => void): this;
+        connect(path: string, connectionListener?: () => void): this;
+        /**
+         * Set the encoding for the socket as a `Readable Stream`. See `readable.setEncoding()` for more information.
+         * @since v0.1.90
+         * @return The socket itself.
+         */
+        setEncoding(encoding?: BufferEncoding): this;
+        /**
+         * Pauses the reading of data. That is, `'data'` events will not be emitted.
+         * Useful to throttle back an upload.
+         * @return The socket itself.
+         */
+        pause(): this;
+        /**
+         * Close the TCP connection by sending an RST packet and destroy the stream.
+         * If this TCP socket is in connecting status, it will send an RST packet and destroy this TCP socket once it is connected.
+         * Otherwise, it will call `socket.destroy` with an `ERR_SOCKET_CLOSED` Error.
+         * If this is not a TCP socket (for example, a pipe), calling this method will immediately throw an `ERR_INVALID_HANDLE_TYPE` Error.
+         * @since v18.3.0, v16.17.0
+         */
+        resetAndDestroy(): this;
+        /**
+         * Resumes reading after a call to `socket.pause()`.
+         * @return The socket itself.
+         */
+        resume(): this;
+        /**
+         * Sets the socket to timeout after `timeout` milliseconds of inactivity on
+         * the socket. By default `net.Socket` do not have a timeout.
+         *
+         * When an idle timeout is triggered the socket will receive a `'timeout'` event but the connection will not be severed. The user must manually call `socket.end()` or `socket.destroy()` to
+         * end the connection.
+         *
+         * ```js
+         * socket.setTimeout(3000);
+         * socket.on('timeout', () => {
+         *   console.log('socket timeout');
+         *   socket.end();
+         * });
+         * ```
+         *
+         * If `timeout` is 0, then the existing idle timeout is disabled.
+         *
+         * The optional `callback` parameter will be added as a one-time listener for the `'timeout'` event.
+         * @since v0.1.90
+         * @return The socket itself.
+         */
+        setTimeout(timeout: number, callback?: () => void): this;
+        /**
+         * Enable/disable the use of Nagle's algorithm.
+         *
+         * When a TCP connection is created, it will have Nagle's algorithm enabled.
+         *
+         * Nagle's algorithm delays data before it is sent via the network. It attempts
+         * to optimize throughput at the expense of latency.
+         *
+         * Passing `true` for `noDelay` or not passing an argument will disable Nagle's
+         * algorithm for the socket. Passing `false` for `noDelay` will enable Nagle's
+         * algorithm.
+         * @since v0.1.90
+         * @param [noDelay=true]
+         * @return The socket itself.
+         */
+        setNoDelay(noDelay?: boolean): this;
+        /**
+         * Enable/disable keep-alive functionality, and optionally set the initial
+         * delay before the first keepalive probe is sent on an idle socket.
+         *
+         * Set `initialDelay` (in milliseconds) to set the delay between the last
+         * data packet received and the first keepalive probe. Setting `0` for`initialDelay` will leave the value unchanged from the default
+         * (or previous) setting.
+         *
+         * Enabling the keep-alive functionality will set the following socket options:
+         *
+         * * `SO_KEEPALIVE=1`
+         * * `TCP_KEEPIDLE=initialDelay`
+         * * `TCP_KEEPCNT=10`
+         * * `TCP_KEEPINTVL=1`
+         * @since v0.1.92
+         * @param [enable=false]
+         * @param [initialDelay=0]
+         * @return The socket itself.
+         */
+        setKeepAlive(enable?: boolean, initialDelay?: number): this;
+        /**
+         * Returns the current Type of Service (TOS) field for IPv4 packets or Traffic
+         * Class for IPv6 packets for this socket.
+         *
+         * `setTypeOfService()` may be called before the socket is connected; the value
+         * will be cached and applied when the socket establishes a connection.
+         * `getTypeOfService()` will return the currently set value even before connection.
+         *
+         * On some platforms (e.g., Linux), certain TOS/ECN bits may be masked or ignored,
+         * and behavior can differ between IPv4 and IPv6 or dual-stack sockets. Callers
+         * should verify platform-specific semantics.
+         * @since v25.6.0
+         * @returns The current TOS value.
+         */
+        getTypeOfService(): number;
+        /**
+         * Sets the Type of Service (TOS) field for IPv4 packets or Traffic Class for IPv6
+         * Packets sent from this socket. This can be used to prioritize network traffic.
+         *
+         * `setTypeOfService()` may be called before the socket is connected; the value
+         * will be cached and applied when the socket establishes a connection.
+         * `getTypeOfService()` will return the currently set value even before connection.
+         *
+         * On some platforms (e.g., Linux), certain TOS/ECN bits may be masked or ignored,
+         * and behavior can differ between IPv4 and IPv6 or dual-stack sockets. Callers
+         * should verify platform-specific semantics.
+         * @since v25.6.0
+         * @param tos The TOS value to set (0-255).
+         * @returns The socket itself.
+         */
+        setTypeOfService(tos: number): this;
+        /**
+         * Returns the bound `address`, the address `family` name and `port` of the
+         * socket as reported by the operating system:`{ port: 12346, family: 'IPv4', address: '127.0.0.1' }`
+         * @since v0.1.90
+         */
+        address(): AddressInfo | {};
+        /**
+         * Calling `unref()` on a socket will allow the program to exit if this is the only
+         * active socket in the event system. If the socket is already `unref`ed calling`unref()` again will have no effect.
+         * @since v0.9.1
+         * @return The socket itself.
+         */
+        unref(): this;
+        /**
+         * Opposite of `unref()`, calling `ref()` on a previously `unref`ed socket will _not_ let the program exit if it's the only socket left (the default behavior).
+         * If the socket is `ref`ed calling `ref` again will have no effect.
+         * @since v0.9.1
+         * @return The socket itself.
+         */
+        ref(): this;
+        /**
+         * This property is only present if the family autoselection algorithm is enabled in `socket.connect(options)`
+         * and it is an array of the addresses that have been attempted.
+         *
+         * Each address is a string in the form of `$IP:$PORT`.
+         * If the connection was successful, then the last address is the one that the socket is currently connected to.
+         * @since v19.4.0
+         */
+        readonly autoSelectFamilyAttemptedAddresses: string[];
+        /**
+         * This property shows the number of characters buffered for writing. The buffer
+         * may contain strings whose length after encoding is not yet known. So this number
+         * is only an approximation of the number of bytes in the buffer.
+         *
+         * `net.Socket` has the property that `socket.write()` always works. This is to
+         * help users get up and running quickly. The computer cannot always keep up
+         * with the amount of data that is written to a socket. The network connection
+         * simply might be too slow. Node.js will internally queue up the data written to a
+         * socket and send it out over the wire when it is possible.
+         *
+         * The consequence of this internal buffering is that memory may grow.
+         * Users who experience large or growing `bufferSize` should attempt to
+         * "throttle" the data flows in their program with `socket.pause()` and `socket.resume()`.
+         * @since v0.3.8
+         * @deprecated Since v14.6.0 - Use `writableLength` instead.
+         */
+        readonly bufferSize: number;
+        /**
+         * The amount of received bytes.
+         * @since v0.5.3
+         */
+        readonly bytesRead: number;
+        /**
+         * The amount of bytes sent.
+         * @since v0.5.3
+         */
+        readonly bytesWritten: number;
+        /**
+         * If `true`, `socket.connect(options[, connectListener])` was
+         * called and has not yet finished. It will stay `true` until the socket becomes
+         * connected, then it is set to `false` and the `'connect'` event is emitted. Note
+         * that the `socket.connect(options[, connectListener])` callback is a listener for the `'connect'` event.
+         * @since v6.1.0
+         */
+        readonly connecting: boolean;
+        /**
+         * This is `true` if the socket is not connected yet, either because `.connect()`has not yet been called or because it is still in the process of connecting
+         * (see `socket.connecting`).
+         * @since v11.2.0, v10.16.0
+         */
+        readonly pending: boolean;
+        /**
+         * See `writable.destroyed` for further details.
+         */
+        readonly destroyed: boolean;
+        /**
+         * The string representation of the local IP address the remote client is
+         * connecting on. For example, in a server listening on `'0.0.0.0'`, if a client
+         * connects on `'192.168.1.1'`, the value of `socket.localAddress` would be`'192.168.1.1'`.
+         * @since v0.9.6
+         */
+        readonly localAddress?: string;
+        /**
+         * The numeric representation of the local port. For example, `80` or `21`.
+         * @since v0.9.6
+         */
+        readonly localPort?: number;
+        /**
+         * The string representation of the local IP family. `'IPv4'` or `'IPv6'`.
+         * @since v18.8.0, v16.18.0
+         */
+        readonly localFamily?: string;
+        /**
+         * This property represents the state of the connection as a string.
+         *
+         * * If the stream is connecting `socket.readyState` is `opening`.
+         * * If the stream is readable and writable, it is `open`.
+         * * If the stream is readable and not writable, it is `readOnly`.
+         * * If the stream is not readable and writable, it is `writeOnly`.
+         * @since v0.5.0
+         */
+        readonly readyState: SocketReadyState;
+        /**
+         * The string representation of the remote IP address. For example,`'74.125.127.100'` or `'2001:4860:a005::68'`. Value may be `undefined` if
+         * the socket is destroyed (for example, if the client disconnected).
+         * @since v0.5.10
+         */
+        readonly remoteAddress: string | undefined;
+        /**
+         * The string representation of the remote IP family. `'IPv4'` or `'IPv6'`. Value may be `undefined` if
+         * the socket is destroyed (for example, if the client disconnected).
+         * @since v0.11.14
+         */
+        readonly remoteFamily: string | undefined;
+        /**
+         * The numeric representation of the remote port. For example, `80` or `21`. Value may be `undefined` if
+         * the socket is destroyed (for example, if the client disconnected).
+         * @since v0.5.10
+         */
+        readonly remotePort: number | undefined;
+        /**
+         * The socket timeout in milliseconds as set by `socket.setTimeout()`.
+         * It is `undefined` if a timeout has not been set.
+         * @since v10.7.0
+         */
+        readonly timeout?: number;
+        /**
+         * Half-closes the socket. i.e., it sends a FIN packet. It is possible the
+         * server will still send some data.
+         *
+         * See `writable.end()` for further details.
+         * @since v0.1.90
+         * @param callback Optional callback for when the socket is finished.
+         * @return The socket itself.
+         */
+        end(callback?: () => void): this;
+        /**
+         * Half-closes the socket, with one final chunk of data.
+         * @see {@link Socket.end} for full details.
+         * @since v0.1.90
+         * @param callback Optional callback for when the socket is finished.
+         * @return The socket itself.
+         */
+        end(buffer: Uint8Array | string, callback?: () => void): this;
+        /**
+         * Half-closes the socket, with one final chunk of data.
+         * @see {@link Socket.end} for full details.
+         * @since v0.1.90
+         * @param [encoding='utf8'] Only used when data is `string`.
+         * @param callback Optional callback for when the socket is finished.
+         * @return The socket itself.
+         */
+        end(str: Uint8Array | string, encoding?: BufferEncoding, callback?: () => void): this;
+        // #region InternalEventEmitter
+        addListener<E extends keyof SocketEventMap>(eventName: E, listener: (...args: SocketEventMap[E]) => void): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof SocketEventMap>(eventName: E, ...args: SocketEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof SocketEventMap>(
+            eventName: E,
+            listener?: (...args: SocketEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof SocketEventMap>(eventName: E): ((...args: SocketEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof SocketEventMap>(eventName: E, listener: (...args: SocketEventMap[E]) => void): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof SocketEventMap>(eventName: E, listener: (...args: SocketEventMap[E]) => void): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof SocketEventMap>(eventName: E, listener: (...args: SocketEventMap[E]) => void): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof SocketEventMap>(
+            eventName: E,
+            listener: (...args: SocketEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof SocketEventMap>(
+            eventName: E,
+            listener: (...args: SocketEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof SocketEventMap>(eventName: E): ((...args: SocketEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof SocketEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof SocketEventMap>(
+            eventName: E,
+            listener: (...args: SocketEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface ListenOptions extends Abortable {
+        backlog?: number | undefined;
+        exclusive?: boolean | undefined;
+        host?: string | undefined;
+        /**
+         * @default false
+         */
+        ipv6Only?: boolean | undefined;
+        reusePort?: boolean | undefined;
+        path?: string | undefined;
+        port?: number | undefined;
+        readableAll?: boolean | undefined;
+        writableAll?: boolean | undefined;
+    }
+    interface ServerOpts {
+        /**
+         * Indicates whether half-opened TCP connections are allowed.
+         * @default false
+         */
+        allowHalfOpen?: boolean | undefined;
+        /**
+         * Indicates whether the socket should be paused on incoming connections.
+         * @default false
+         */
+        pauseOnConnect?: boolean | undefined;
+        /**
+         * If set to `true`, it disables the use of Nagle's algorithm immediately after a new incoming connection is received.
+         * @default false
+         * @since v16.5.0
+         */
+        noDelay?: boolean | undefined;
+        /**
+         * If set to `true`, it enables keep-alive functionality on the socket immediately after a new incoming connection is received,
+         * similarly on what is done in `socket.setKeepAlive([enable][, initialDelay])`.
+         * @default false
+         * @since v16.5.0
+         */
+        keepAlive?: boolean | undefined;
+        /**
+         * If set to a positive number, it sets the initial delay before the first keepalive probe is sent on an idle socket.
+         * @default 0
+         * @since v16.5.0
+         */
+        keepAliveInitialDelay?: number | undefined;
+        /**
+         * Optionally overrides all `net.Socket`s' `readableHighWaterMark` and `writableHighWaterMark`.
+         * @default See [stream.getDefaultHighWaterMark()](https://nodejs.org/docs/latest-v25.x/api/stream.html#streamgetdefaulthighwatermarkobjectmode).
+         * @since v18.17.0, v20.1.0
+         */
+        highWaterMark?: number | undefined;
+        /**
+         * `blockList` can be used for disabling inbound
+         * access to specific IP addresses, IP ranges, or IP subnets. This does not
+         * work if the server is behind a reverse proxy, NAT, etc. because the address
+         * checked against the block list is the address of the proxy, or the one
+         * specified by the NAT.
+         * @since v22.13.0
+         */
+        blockList?: BlockList | undefined;
+    }
+    interface DropArgument {
+        localAddress?: string;
+        localPort?: number;
+        localFamily?: string;
+        remoteAddress?: string;
+        remotePort?: number;
+        remoteFamily?: string;
+    }
+    interface ServerEventMap {
+        "close": [];
+        "connection": [socket: Socket];
+        "error": [err: Error];
+        "listening": [];
+        "drop": [data?: DropArgument];
+    }
+    /**
+     * This class is used to create a TCP or `IPC` server.
+     * @since v0.1.90
+     */
+    class Server implements EventEmitter {
+        constructor(connectionListener?: (socket: Socket) => void);
+        constructor(options?: ServerOpts, connectionListener?: (socket: Socket) => void);
+        /**
+         * Start a server listening for connections. A `net.Server` can be a TCP or
+         * an `IPC` server depending on what it listens to.
+         *
+         * Possible signatures:
+         *
+         * * `server.listen(handle[, backlog][, callback])`
+         * * `server.listen(options[, callback])`
+         * * `server.listen(path[, backlog][, callback])` for `IPC` servers
+         * * `server.listen([port[, host[, backlog]]][, callback])` for TCP servers
+         *
+         * This function is asynchronous. When the server starts listening, the `'listening'` event will be emitted. The last parameter `callback`will be added as a listener for the `'listening'`
+         * event.
+         *
+         * All `listen()` methods can take a `backlog` parameter to specify the maximum
+         * length of the queue of pending connections. The actual length will be determined
+         * by the OS through sysctl settings such as `tcp_max_syn_backlog` and `somaxconn` on Linux. The default value of this parameter is 511 (not 512).
+         *
+         * All {@link Socket} are set to `SO_REUSEADDR` (see [`socket(7)`](https://man7.org/linux/man-pages/man7/socket.7.html) for
+         * details).
+         *
+         * The `server.listen()` method can be called again if and only if there was an
+         * error during the first `server.listen()` call or `server.close()` has been
+         * called. Otherwise, an `ERR_SERVER_ALREADY_LISTEN` error will be thrown.
+         *
+         * One of the most common errors raised when listening is `EADDRINUSE`.
+         * This happens when another server is already listening on the requested`port`/`path`/`handle`. One way to handle this would be to retry
+         * after a certain amount of time:
+         *
+         * ```js
+         * server.on('error', (e) => {
+         *   if (e.code === 'EADDRINUSE') {
+         *     console.error('Address in use, retrying...');
+         *     setTimeout(() => {
+         *       server.close();
+         *       server.listen(PORT, HOST);
+         *     }, 1000);
+         *   }
+         * });
+         * ```
+         */
+        listen(port?: number, hostname?: string, backlog?: number, listeningListener?: () => void): this;
+        listen(port?: number, hostname?: string, listeningListener?: () => void): this;
+        listen(port?: number, backlog?: number, listeningListener?: () => void): this;
+        listen(port?: number, listeningListener?: () => void): this;
+        listen(path: string, backlog?: number, listeningListener?: () => void): this;
+        listen(path: string, listeningListener?: () => void): this;
+        listen(options: ListenOptions, listeningListener?: () => void): this;
+        listen(handle: any, backlog?: number, listeningListener?: () => void): this;
+        listen(handle: any, listeningListener?: () => void): this;
+        /**
+         * Stops the server from accepting new connections and keeps existing
+         * connections. This function is asynchronous, the server is finally closed
+         * when all connections are ended and the server emits a `'close'` event.
+         * The optional `callback` will be called once the `'close'` event occurs. Unlike
+         * that event, it will be called with an `Error` as its only argument if the server
+         * was not open when it was closed.
+         * @since v0.1.90
+         * @param callback Called when the server is closed.
+         */
+        close(callback?: (err?: Error) => void): this;
+        /**
+         * Returns the bound `address`, the address `family` name, and `port` of the server
+         * as reported by the operating system if listening on an IP socket
+         * (useful to find which port was assigned when getting an OS-assigned address):`{ port: 12346, family: 'IPv4', address: '127.0.0.1' }`.
+         *
+         * For a server listening on a pipe or Unix domain socket, the name is returned
+         * as a string.
+         *
+         * ```js
+         * const server = net.createServer((socket) => {
+         *   socket.end('goodbye\n');
+         * }).on('error', (err) => {
+         *   // Handle errors here.
+         *   throw err;
+         * });
+         *
+         * // Grab an arbitrary unused port.
+         * server.listen(() => {
+         *   console.log('opened server on', server.address());
+         * });
+         * ```
+         *
+         * `server.address()` returns `null` before the `'listening'` event has been
+         * emitted or after calling `server.close()`.
+         * @since v0.1.90
+         */
+        address(): AddressInfo | string | null;
+        /**
+         * Asynchronously get the number of concurrent connections on the server. Works
+         * when sockets were sent to forks.
+         *
+         * Callback should take two arguments `err` and `count`.
+         * @since v0.9.7
+         */
+        getConnections(cb: (error: Error | null, count: number) => void): this;
+        /**
+         * Opposite of `unref()`, calling `ref()` on a previously `unref`ed server will _not_ let the program exit if it's the only server left (the default behavior).
+         * If the server is `ref`ed calling `ref()` again will have no effect.
+         * @since v0.9.1
+         */
+        ref(): this;
+        /**
+         * Calling `unref()` on a server will allow the program to exit if this is the only
+         * active server in the event system. If the server is already `unref`ed calling`unref()` again will have no effect.
+         * @since v0.9.1
+         */
+        unref(): this;
+        /**
+         * Set this property to reject connections when the server's connection count gets
+         * high.
+         *
+         * It is not recommended to use this option once a socket has been sent to a child
+         * with `child_process.fork()`.
+         * @since v0.2.0
+         */
+        maxConnections: number;
+        connections: number;
+        /**
+         * Indicates whether or not the server is listening for connections.
+         * @since v5.7.0
+         */
+        readonly listening: boolean;
+        /**
+         * Calls {@link Server.close()} and returns a promise that fulfills when the server has closed.
+         * @since v20.5.0
+         */
+        [Symbol.asyncDispose](): Promise<void>;
+    }
+    interface Server extends InternalEventEmitter<ServerEventMap> {}
+    type IPVersion = "ipv4" | "ipv6";
+    /**
+     * The `BlockList` object can be used with some network APIs to specify rules for
+     * disabling inbound or outbound access to specific IP addresses, IP ranges, or
+     * IP subnets.
+     * @since v15.0.0, v14.18.0
+     */
+    class BlockList {
+        /**
+         * Adds a rule to block the given IP address.
+         * @since v15.0.0, v14.18.0
+         * @param address An IPv4 or IPv6 address.
+         * @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
+         */
+        addAddress(address: string, type?: IPVersion): void;
+        addAddress(address: SocketAddress): void;
+        /**
+         * Adds a rule to block a range of IP addresses from `start` (inclusive) to`end` (inclusive).
+         * @since v15.0.0, v14.18.0
+         * @param start The starting IPv4 or IPv6 address in the range.
+         * @param end The ending IPv4 or IPv6 address in the range.
+         * @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
+         */
+        addRange(start: string, end: string, type?: IPVersion): void;
+        addRange(start: SocketAddress, end: SocketAddress): void;
+        /**
+         * Adds a rule to block a range of IP addresses specified as a subnet mask.
+         * @since v15.0.0, v14.18.0
+         * @param net The network IPv4 or IPv6 address.
+         * @param prefix The number of CIDR prefix bits. For IPv4, this must be a value between `0` and `32`. For IPv6, this must be between `0` and `128`.
+         * @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
+         */
+        addSubnet(net: SocketAddress, prefix: number): void;
+        addSubnet(net: string, prefix: number, type?: IPVersion): void;
+        /**
+         * Returns `true` if the given IP address matches any of the rules added to the`BlockList`.
+         *
+         * ```js
+         * const blockList = new net.BlockList();
+         * blockList.addAddress('123.123.123.123');
+         * blockList.addRange('10.0.0.1', '10.0.0.10');
+         * blockList.addSubnet('8592:757c:efae:4e45::', 64, 'ipv6');
+         *
+         * console.log(blockList.check('123.123.123.123'));  // Prints: true
+         * console.log(blockList.check('10.0.0.3'));  // Prints: true
+         * console.log(blockList.check('222.111.111.222'));  // Prints: false
+         *
+         * // IPv6 notation for IPv4 addresses works:
+         * console.log(blockList.check('::ffff:7b7b:7b7b', 'ipv6')); // Prints: true
+         * console.log(blockList.check('::ffff:123.123.123.123', 'ipv6')); // Prints: true
+         * ```
+         * @since v15.0.0, v14.18.0
+         * @param address The IP address to check
+         * @param [type='ipv4'] Either `'ipv4'` or `'ipv6'`.
+         */
+        check(address: SocketAddress): boolean;
+        check(address: string, type?: IPVersion): boolean;
+        /**
+         * The list of rules added to the blocklist.
+         * @since v15.0.0, v14.18.0
+         */
+        rules: readonly string[];
+        /**
+         * Returns `true` if the `value` is a `net.BlockList`.
+         * @since v22.13.0
+         * @param value Any JS value
+         */
+        static isBlockList(value: unknown): value is BlockList;
+        /**
+         * ```js
+         * const blockList = new net.BlockList();
+         * const data = [
+         *   'Subnet: IPv4 192.168.1.0/24',
+         *   'Address: IPv4 10.0.0.5',
+         *   'Range: IPv4 192.168.2.1-192.168.2.10',
+         *   'Range: IPv4 10.0.0.1-10.0.0.10',
+         * ];
+         * blockList.fromJSON(data);
+         * blockList.fromJSON(JSON.stringify(data));
+         * ```
+         * @since v24.5.0
+         * @experimental
+         */
+        fromJSON(data: string | readonly string[]): void;
+        /**
+         * @since v24.5.0
+         * @experimental
+         */
+        toJSON(): readonly string[];
+    }
+    interface TcpNetConnectOpts extends TcpSocketConnectOpts, SocketConstructorOpts {
+        timeout?: number | undefined;
+    }
+    interface IpcNetConnectOpts extends IpcSocketConnectOpts, SocketConstructorOpts {
+        timeout?: number | undefined;
+    }
+    type NetConnectOpts = TcpNetConnectOpts | IpcNetConnectOpts;
+    /**
+     * Creates a new TCP or `IPC` server.
+     *
+     * If `allowHalfOpen` is set to `true`, when the other end of the socket
+     * signals the end of transmission, the server will only send back the end of
+     * transmission when `socket.end()` is explicitly called. For example, in the
+     * context of TCP, when a FIN packed is received, a FIN packed is sent
+     * back only when `socket.end()` is explicitly called. Until then the
+     * connection is half-closed (non-readable but still writable). See `'end'` event and [RFC 1122](https://tools.ietf.org/html/rfc1122) (section 4.2.2.13) for more information.
+     *
+     * If `pauseOnConnect` is set to `true`, then the socket associated with each
+     * incoming connection will be paused, and no data will be read from its handle.
+     * This allows connections to be passed between processes without any data being
+     * read by the original process. To begin reading data from a paused socket, call `socket.resume()`.
+     *
+     * The server can be a TCP server or an `IPC` server, depending on what it `listen()` to.
+     *
+     * Here is an example of a TCP echo server which listens for connections
+     * on port 8124:
+     *
+     * ```js
+     * import net from 'node:net';
+     * const server = net.createServer((c) => {
+     *   // 'connection' listener.
+     *   console.log('client connected');
+     *   c.on('end', () => {
+     *     console.log('client disconnected');
+     *   });
+     *   c.write('hello\r\n');
+     *   c.pipe(c);
+     * });
+     * server.on('error', (err) => {
+     *   throw err;
+     * });
+     * server.listen(8124, () => {
+     *   console.log('server bound');
+     * });
+     * ```
+     *
+     * Test this by using `telnet`:
+     *
+     * ```bash
+     * telnet localhost 8124
+     * ```
+     *
+     * To listen on the socket `/tmp/echo.sock`:
+     *
+     * ```js
+     * server.listen('/tmp/echo.sock', () => {
+     *   console.log('server bound');
+     * });
+     * ```
+     *
+     * Use `nc` to connect to a Unix domain socket server:
+     *
+     * ```bash
+     * nc -U /tmp/echo.sock
+     * ```
+     * @since v0.5.0
+     * @param connectionListener Automatically set as a listener for the {@link 'connection'} event.
+     */
+    function createServer(connectionListener?: (socket: Socket) => void): Server;
+    function createServer(options?: ServerOpts, connectionListener?: (socket: Socket) => void): Server;
+    /**
+     * Aliases to {@link createConnection}.
+     *
+     * Possible signatures:
+     *
+     * * {@link connect}
+     * * {@link connect} for `IPC` connections.
+     * * {@link connect} for TCP connections.
+     */
+    function connect(options: NetConnectOpts, connectionListener?: () => void): Socket;
+    function connect(port: number, host?: string, connectionListener?: () => void): Socket;
+    function connect(path: string, connectionListener?: () => void): Socket;
+    /**
+     * A factory function, which creates a new {@link Socket},
+     * immediately initiates connection with `socket.connect()`,
+     * then returns the `net.Socket` that starts the connection.
+     *
+     * When the connection is established, a `'connect'` event will be emitted
+     * on the returned socket. The last parameter `connectListener`, if supplied,
+     * will be added as a listener for the `'connect'` event **once**.
+     *
+     * Possible signatures:
+     *
+     * * {@link createConnection}
+     * * {@link createConnection} for `IPC` connections.
+     * * {@link createConnection} for TCP connections.
+     *
+     * The {@link connect} function is an alias to this function.
+     */
+    function createConnection(options: NetConnectOpts, connectionListener?: () => void): Socket;
+    function createConnection(port: number, host?: string, connectionListener?: () => void): Socket;
+    function createConnection(path: string, connectionListener?: () => void): Socket;
+    /**
+     * Gets the current default value of the `autoSelectFamily` option of `socket.connect(options)`.
+     * The initial default value is `true`, unless the command line option`--no-network-family-autoselection` is provided.
+     * @since v19.4.0
+     */
+    function getDefaultAutoSelectFamily(): boolean;
+    /**
+     * Sets the default value of the `autoSelectFamily` option of `socket.connect(options)`.
+     * @param value The new default value.
+     * The initial default value is `true`, unless the command line option
+     * `--no-network-family-autoselection` is provided.
+     * @since v19.4.0
+     */
+    function setDefaultAutoSelectFamily(value: boolean): void;
+    /**
+     * Gets the current default value of the `autoSelectFamilyAttemptTimeout` option of `socket.connect(options)`.
+     * The initial default value is `500` or the value specified via the command line option `--network-family-autoselection-attempt-timeout`.
+     * @returns The current default value of the `autoSelectFamilyAttemptTimeout` option.
+     * @since v19.8.0, v18.8.0
+     */
+    function getDefaultAutoSelectFamilyAttemptTimeout(): number;
+    /**
+     * Sets the default value of the `autoSelectFamilyAttemptTimeout` option of `socket.connect(options)`.
+     * @param value The new default value, which must be a positive number. If the number is less than `10`, the value `10` is used instead. The initial default value is `250` or the value specified via the command line
+     * option `--network-family-autoselection-attempt-timeout`.
+     * @since v19.8.0, v18.8.0
+     */
+    function setDefaultAutoSelectFamilyAttemptTimeout(value: number): void;
+    /**
+     * Returns `6` if `input` is an IPv6 address. Returns `4` if `input` is an IPv4
+     * address in [dot-decimal notation](https://en.wikipedia.org/wiki/Dot-decimal_notation) with no leading zeroes. Otherwise, returns`0`.
+     *
+     * ```js
+     * net.isIP('::1'); // returns 6
+     * net.isIP('127.0.0.1'); // returns 4
+     * net.isIP('127.000.000.001'); // returns 0
+     * net.isIP('127.0.0.1/24'); // returns 0
+     * net.isIP('fhqwhgads'); // returns 0
+     * ```
+     * @since v0.3.0
+     */
+    function isIP(input: string): number;
+    /**
+     * Returns `true` if `input` is an IPv4 address in [dot-decimal notation](https://en.wikipedia.org/wiki/Dot-decimal_notation) with no
+     * leading zeroes. Otherwise, returns `false`.
+     *
+     * ```js
+     * net.isIPv4('127.0.0.1'); // returns true
+     * net.isIPv4('127.000.000.001'); // returns false
+     * net.isIPv4('127.0.0.1/24'); // returns false
+     * net.isIPv4('fhqwhgads'); // returns false
+     * ```
+     * @since v0.3.0
+     */
+    function isIPv4(input: string): boolean;
+    /**
+     * Returns `true` if `input` is an IPv6 address. Otherwise, returns `false`.
+     *
+     * ```js
+     * net.isIPv6('::1'); // returns true
+     * net.isIPv6('fhqwhgads'); // returns false
+     * ```
+     * @since v0.3.0
+     */
+    function isIPv6(input: string): boolean;
+    interface SocketAddressInitOptions {
+        /**
+         * The network address as either an IPv4 or IPv6 string.
+         * @default 127.0.0.1
+         */
+        address?: string | undefined;
+        /**
+         * @default `'ipv4'`
+         */
+        family?: IPVersion | undefined;
+        /**
+         * An IPv6 flow-label used only if `family` is `'ipv6'`.
+         * @default 0
+         */
+        flowlabel?: number | undefined;
+        /**
+         * An IP port.
+         * @default 0
+         */
+        port?: number | undefined;
+    }
+    /**
+     * @since v15.14.0, v14.18.0
+     */
+    class SocketAddress {
+        constructor(options: SocketAddressInitOptions);
+        /**
+         * Either \`'ipv4'\` or \`'ipv6'\`.
+         * @since v15.14.0, v14.18.0
+         */
+        readonly address: string;
+        /**
+         * Either \`'ipv4'\` or \`'ipv6'\`.
+         * @since v15.14.0, v14.18.0
+         */
+        readonly family: IPVersion;
+        /**
+         * @since v15.14.0, v14.18.0
+         */
+        readonly port: number;
+        /**
+         * @since v15.14.0, v14.18.0
+         */
+        readonly flowlabel: number;
+        /**
+         * @since v22.13.0
+         * @param input An input string containing an IP address and optional port,
+         * e.g. `123.1.2.3:1234` or `[1::1]:1234`.
+         * @returns Returns a `SocketAddress` if parsing was successful.
+         * Otherwise returns `undefined`.
+         */
+        static parse(input: string): SocketAddress | undefined;
+    }
+}
+declare module "net" {
+    export * from "node:net";
+}
diff --git a/mqtt-backend/node_modules/@types/node/os.d.ts b/mqtt-backend/node_modules/@types/node/os.d.ts
new file mode 100644
index 0000000..562c463
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/os.d.ts
@@ -0,0 +1,498 @@
+declare module "node:os" {
+    import { NonSharedBuffer } from "buffer";
+    interface CpuInfo {
+        model: string;
+        speed: number;
+        times: {
+            /** The number of milliseconds the CPU has spent in user mode. */
+            user: number;
+            /** The number of milliseconds the CPU has spent in nice mode. */
+            nice: number;
+            /** The number of milliseconds the CPU has spent in sys mode. */
+            sys: number;
+            /** The number of milliseconds the CPU has spent in idle mode. */
+            idle: number;
+            /** The number of milliseconds the CPU has spent in irq mode. */
+            irq: number;
+        };
+    }
+    interface NetworkInterfaceBase {
+        address: string;
+        netmask: string;
+        mac: string;
+        internal: boolean;
+        cidr: string | null;
+        scopeid?: number;
+    }
+    interface NetworkInterfaceInfoIPv4 extends NetworkInterfaceBase {
+        family: "IPv4";
+    }
+    interface NetworkInterfaceInfoIPv6 extends NetworkInterfaceBase {
+        family: "IPv6";
+        scopeid: number;
+    }
+    interface UserInfo<T> {
+        username: T;
+        uid: number;
+        gid: number;
+        shell: T | null;
+        homedir: T;
+    }
+    type NetworkInterfaceInfo = NetworkInterfaceInfoIPv4 | NetworkInterfaceInfoIPv6;
+    /**
+     * Returns the host name of the operating system as a string.
+     * @since v0.3.3
+     */
+    function hostname(): string;
+    /**
+     * Returns an array containing the 1, 5, and 15 minute load averages.
+     *
+     * The load average is a measure of system activity calculated by the operating
+     * system and expressed as a fractional number.
+     *
+     * The load average is a Unix-specific concept. On Windows, the return value is
+     * always `[0, 0, 0]`.
+     * @since v0.3.3
+     */
+    function loadavg(): number[];
+    /**
+     * Returns the system uptime in number of seconds.
+     * @since v0.3.3
+     */
+    function uptime(): number;
+    /**
+     * Returns the amount of free system memory in bytes as an integer.
+     * @since v0.3.3
+     */
+    function freemem(): number;
+    /**
+     * Returns the total amount of system memory in bytes as an integer.
+     * @since v0.3.3
+     */
+    function totalmem(): number;
+    /**
+     * Returns an array of objects containing information about each logical CPU core.
+     * The array will be empty if no CPU information is available, such as if the `/proc` file system is unavailable.
+     *
+     * The properties included on each object include:
+     *
+     * ```js
+     * [
+     *   {
+     *     model: 'Intel(R) Core(TM) i7 CPU         860  @ 2.80GHz',
+     *     speed: 2926,
+     *     times: {
+     *       user: 252020,
+     *       nice: 0,
+     *       sys: 30340,
+     *       idle: 1070356870,
+     *       irq: 0,
+     *     },
+     *   },
+     *   {
+     *     model: 'Intel(R) Core(TM) i7 CPU         860  @ 2.80GHz',
+     *     speed: 2926,
+     *     times: {
+     *       user: 306960,
+     *       nice: 0,
+     *       sys: 26980,
+     *       idle: 1071569080,
+     *       irq: 0,
+     *     },
+     *   },
+     *   {
+     *     model: 'Intel(R) Core(TM) i7 CPU         860  @ 2.80GHz',
+     *     speed: 2926,
+     *     times: {
+     *       user: 248450,
+     *       nice: 0,
+     *       sys: 21750,
+     *       idle: 1070919370,
+     *       irq: 0,
+     *     },
+     *   },
+     *   {
+     *     model: 'Intel(R) Core(TM) i7 CPU         860  @ 2.80GHz',
+     *     speed: 2926,
+     *     times: {
+     *       user: 256880,
+     *       nice: 0,
+     *       sys: 19430,
+     *       idle: 1070905480,
+     *       irq: 20,
+     *     },
+     *   },
+     * ]
+     * ```
+     *
+     * `nice` values are POSIX-only. On Windows, the `nice` values of all processors
+     * are always 0.
+     *
+     * `os.cpus().length` should not be used to calculate the amount of parallelism
+     * available to an application. Use {@link availableParallelism} for this purpose.
+     * @since v0.3.3
+     */
+    function cpus(): CpuInfo[];
+    /**
+     * Returns an estimate of the default amount of parallelism a program should use.
+     * Always returns a value greater than zero.
+     *
+     * This function is a small wrapper about libuv's [`uv_available_parallelism()`](https://docs.libuv.org/en/v1.x/misc.html#c.uv_available_parallelism).
+     * @since v19.4.0, v18.14.0
+     */
+    function availableParallelism(): number;
+    /**
+     * Returns the operating system name as returned by [`uname(3)`](https://linux.die.net/man/3/uname). For example, it
+     * returns `'Linux'` on Linux, `'Darwin'` on macOS, and `'Windows_NT'` on Windows.
+     *
+     * See [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for additional information
+     * about the output of running [`uname(3)`](https://linux.die.net/man/3/uname) on various operating systems.
+     * @since v0.3.3
+     */
+    function type(): string;
+    /**
+     * Returns the operating system as a string.
+     *
+     * On POSIX systems, the operating system release is determined by calling [`uname(3)`](https://linux.die.net/man/3/uname). On Windows, `GetVersionExW()` is used. See
+     * [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for more information.
+     * @since v0.3.3
+     */
+    function release(): string;
+    /**
+     * Returns an object containing network interfaces that have been assigned a
+     * network address.
+     *
+     * Each key on the returned object identifies a network interface. The associated
+     * value is an array of objects that each describe an assigned network address.
+     *
+     * The properties available on the assigned network address object include:
+     *
+     * ```js
+     * {
+     *   lo: [
+     *     {
+     *       address: '127.0.0.1',
+     *       netmask: '255.0.0.0',
+     *       family: 'IPv4',
+     *       mac: '00:00:00:00:00:00',
+     *       internal: true,
+     *       cidr: '127.0.0.1/8'
+     *     },
+     *     {
+     *       address: '::1',
+     *       netmask: 'ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff',
+     *       family: 'IPv6',
+     *       mac: '00:00:00:00:00:00',
+     *       scopeid: 0,
+     *       internal: true,
+     *       cidr: '::1/128'
+     *     }
+     *   ],
+     *   eth0: [
+     *     {
+     *       address: '192.168.1.108',
+     *       netmask: '255.255.255.0',
+     *       family: 'IPv4',
+     *       mac: '01:02:03:0a:0b:0c',
+     *       internal: false,
+     *       cidr: '192.168.1.108/24'
+     *     },
+     *     {
+     *       address: 'fe80::a00:27ff:fe4e:66a1',
+     *       netmask: 'ffff:ffff:ffff:ffff::',
+     *       family: 'IPv6',
+     *       mac: '01:02:03:0a:0b:0c',
+     *       scopeid: 1,
+     *       internal: false,
+     *       cidr: 'fe80::a00:27ff:fe4e:66a1/64'
+     *     }
+     *   ]
+     * }
+     * ```
+     * @since v0.6.0
+     */
+    function networkInterfaces(): NodeJS.Dict<NetworkInterfaceInfo[]>;
+    /**
+     * Returns the string path of the current user's home directory.
+     *
+     * On POSIX, it uses the `$HOME` environment variable if defined. Otherwise it
+     * uses the [effective UID](https://en.wikipedia.org/wiki/User_identifier#Effective_user_ID) to look up the user's home directory.
+     *
+     * On Windows, it uses the `USERPROFILE` environment variable if defined.
+     * Otherwise it uses the path to the profile directory of the current user.
+     * @since v2.3.0
+     */
+    function homedir(): string;
+    interface UserInfoOptions {
+        encoding?: BufferEncoding | "buffer" | undefined;
+    }
+    interface UserInfoOptionsWithBufferEncoding extends UserInfoOptions {
+        encoding: "buffer";
+    }
+    interface UserInfoOptionsWithStringEncoding extends UserInfoOptions {
+        encoding?: BufferEncoding | undefined;
+    }
+    /**
+     * Returns information about the currently effective user. On POSIX platforms,
+     * this is typically a subset of the password file. The returned object includes
+     * the `username`, `uid`, `gid`, `shell`, and `homedir`. On Windows, the `uid` and `gid` fields are `-1`, and `shell` is `null`.
+     *
+     * The value of `homedir` returned by `os.userInfo()` is provided by the operating
+     * system. This differs from the result of `os.homedir()`, which queries
+     * environment variables for the home directory before falling back to the
+     * operating system response.
+     *
+     * Throws a [`SystemError`](https://nodejs.org/docs/latest-v25.x/api/errors.html#class-systemerror) if a user has no `username` or `homedir`.
+     * @since v6.0.0
+     */
+    function userInfo(options?: UserInfoOptionsWithStringEncoding): UserInfo<string>;
+    function userInfo(options: UserInfoOptionsWithBufferEncoding): UserInfo<NonSharedBuffer>;
+    function userInfo(options: UserInfoOptions): UserInfo<string | NonSharedBuffer>;
+    type SignalConstants = {
+        [key in NodeJS.Signals]: number;
+    };
+    namespace constants {
+        const UV_UDP_REUSEADDR: number;
+        namespace signals {}
+        const signals: SignalConstants;
+        namespace errno {
+            const E2BIG: number;
+            const EACCES: number;
+            const EADDRINUSE: number;
+            const EADDRNOTAVAIL: number;
+            const EAFNOSUPPORT: number;
+            const EAGAIN: number;
+            const EALREADY: number;
+            const EBADF: number;
+            const EBADMSG: number;
+            const EBUSY: number;
+            const ECANCELED: number;
+            const ECHILD: number;
+            const ECONNABORTED: number;
+            const ECONNREFUSED: number;
+            const ECONNRESET: number;
+            const EDEADLK: number;
+            const EDESTADDRREQ: number;
+            const EDOM: number;
+            const EDQUOT: number;
+            const EEXIST: number;
+            const EFAULT: number;
+            const EFBIG: number;
+            const EHOSTUNREACH: number;
+            const EIDRM: number;
+            const EILSEQ: number;
+            const EINPROGRESS: number;
+            const EINTR: number;
+            const EINVAL: number;
+            const EIO: number;
+            const EISCONN: number;
+            const EISDIR: number;
+            const ELOOP: number;
+            const EMFILE: number;
+            const EMLINK: number;
+            const EMSGSIZE: number;
+            const EMULTIHOP: number;
+            const ENAMETOOLONG: number;
+            const ENETDOWN: number;
+            const ENETRESET: number;
+            const ENETUNREACH: number;
+            const ENFILE: number;
+            const ENOBUFS: number;
+            const ENODATA: number;
+            const ENODEV: number;
+            const ENOENT: number;
+            const ENOEXEC: number;
+            const ENOLCK: number;
+            const ENOLINK: number;
+            const ENOMEM: number;
+            const ENOMSG: number;
+            const ENOPROTOOPT: number;
+            const ENOSPC: number;
+            const ENOSR: number;
+            const ENOSTR: number;
+            const ENOSYS: number;
+            const ENOTCONN: number;
+            const ENOTDIR: number;
+            const ENOTEMPTY: number;
+            const ENOTSOCK: number;
+            const ENOTSUP: number;
+            const ENOTTY: number;
+            const ENXIO: number;
+            const EOPNOTSUPP: number;
+            const EOVERFLOW: number;
+            const EPERM: number;
+            const EPIPE: number;
+            const EPROTO: number;
+            const EPROTONOSUPPORT: number;
+            const EPROTOTYPE: number;
+            const ERANGE: number;
+            const EROFS: number;
+            const ESPIPE: number;
+            const ESRCH: number;
+            const ESTALE: number;
+            const ETIME: number;
+            const ETIMEDOUT: number;
+            const ETXTBSY: number;
+            const EWOULDBLOCK: number;
+            const EXDEV: number;
+            const WSAEINTR: number;
+            const WSAEBADF: number;
+            const WSAEACCES: number;
+            const WSAEFAULT: number;
+            const WSAEINVAL: number;
+            const WSAEMFILE: number;
+            const WSAEWOULDBLOCK: number;
+            const WSAEINPROGRESS: number;
+            const WSAEALREADY: number;
+            const WSAENOTSOCK: number;
+            const WSAEDESTADDRREQ: number;
+            const WSAEMSGSIZE: number;
+            const WSAEPROTOTYPE: number;
+            const WSAENOPROTOOPT: number;
+            const WSAEPROTONOSUPPORT: number;
+            const WSAESOCKTNOSUPPORT: number;
+            const WSAEOPNOTSUPP: number;
+            const WSAEPFNOSUPPORT: number;
+            const WSAEAFNOSUPPORT: number;
+            const WSAEADDRINUSE: number;
+            const WSAEADDRNOTAVAIL: number;
+            const WSAENETDOWN: number;
+            const WSAENETUNREACH: number;
+            const WSAENETRESET: number;
+            const WSAECONNABORTED: number;
+            const WSAECONNRESET: number;
+            const WSAENOBUFS: number;
+            const WSAEISCONN: number;
+            const WSAENOTCONN: number;
+            const WSAESHUTDOWN: number;
+            const WSAETOOMANYREFS: number;
+            const WSAETIMEDOUT: number;
+            const WSAECONNREFUSED: number;
+            const WSAELOOP: number;
+            const WSAENAMETOOLONG: number;
+            const WSAEHOSTDOWN: number;
+            const WSAEHOSTUNREACH: number;
+            const WSAENOTEMPTY: number;
+            const WSAEPROCLIM: number;
+            const WSAEUSERS: number;
+            const WSAEDQUOT: number;
+            const WSAESTALE: number;
+            const WSAEREMOTE: number;
+            const WSASYSNOTREADY: number;
+            const WSAVERNOTSUPPORTED: number;
+            const WSANOTINITIALISED: number;
+            const WSAEDISCON: number;
+            const WSAENOMORE: number;
+            const WSAECANCELLED: number;
+            const WSAEINVALIDPROCTABLE: number;
+            const WSAEINVALIDPROVIDER: number;
+            const WSAEPROVIDERFAILEDINIT: number;
+            const WSASYSCALLFAILURE: number;
+            const WSASERVICE_NOT_FOUND: number;
+            const WSATYPE_NOT_FOUND: number;
+            const WSA_E_NO_MORE: number;
+            const WSA_E_CANCELLED: number;
+            const WSAEREFUSED: number;
+        }
+        namespace dlopen {
+            const RTLD_LAZY: number;
+            const RTLD_NOW: number;
+            const RTLD_GLOBAL: number;
+            const RTLD_LOCAL: number;
+            const RTLD_DEEPBIND: number;
+        }
+        namespace priority {
+            const PRIORITY_LOW: number;
+            const PRIORITY_BELOW_NORMAL: number;
+            const PRIORITY_NORMAL: number;
+            const PRIORITY_ABOVE_NORMAL: number;
+            const PRIORITY_HIGH: number;
+            const PRIORITY_HIGHEST: number;
+        }
+    }
+    const devNull: string;
+    /**
+     * The operating system-specific end-of-line marker.
+     * * `\n` on POSIX
+     * * `\r\n` on Windows
+     */
+    const EOL: string;
+    /**
+     * Returns the operating system CPU architecture for which the Node.js binary was
+     * compiled. Possible values are `'arm'`, `'arm64'`, `'ia32'`, `'loong64'`,
+     * `'mips'`, `'mipsel'`, `'ppc64'`, `'riscv64'`, `'s390x'`, and `'x64'`.
+     *
+     * The return value is equivalent to [process.arch](https://nodejs.org/docs/latest-v25.x/api/process.html#processarch).
+     * @since v0.5.0
+     */
+    function arch(): NodeJS.Architecture;
+    /**
+     * Returns a string identifying the kernel version.
+     *
+     * On POSIX systems, the operating system release is determined by calling [`uname(3)`](https://linux.die.net/man/3/uname). On Windows, `RtlGetVersion()` is used, and if it is not
+     * available, `GetVersionExW()` will be used. See [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for more information.
+     * @since v13.11.0, v12.17.0
+     */
+    function version(): string;
+    /**
+     * Returns a string identifying the operating system platform for which
+     * the Node.js binary was compiled. The value is set at compile time.
+     * Possible values are `'aix'`, `'darwin'`, `'freebsd'`, `'linux'`, `'openbsd'`, `'sunos'`, and `'win32'`.
+     *
+     * The return value is equivalent to `process.platform`.
+     *
+     * The value `'android'` may also be returned if Node.js is built on the Android
+     * operating system. [Android support is experimental](https://github.com/nodejs/node/blob/HEAD/BUILDING.md#androidandroid-based-devices-eg-firefox-os).
+     * @since v0.5.0
+     */
+    function platform(): NodeJS.Platform;
+    /**
+     * Returns the machine type as a string, such as `arm`, `arm64`, `aarch64`,
+     * `mips`, `mips64`, `ppc64`, `ppc64le`, `s390x`, `i386`, `i686`, `x86_64`.
+     *
+     * On POSIX systems, the machine type is determined by calling [`uname(3)`](https://linux.die.net/man/3/uname). On Windows, `RtlGetVersion()` is used, and if it is not
+     * available, `GetVersionExW()` will be used. See [https://en.wikipedia.org/wiki/Uname#Examples](https://en.wikipedia.org/wiki/Uname#Examples) for more information.
+     * @since v18.9.0, v16.18.0
+     */
+    function machine(): string;
+    /**
+     * Returns the operating system's default directory for temporary files as a
+     * string.
+     * @since v0.9.9
+     */
+    function tmpdir(): string;
+    /**
+     * Returns a string identifying the endianness of the CPU for which the Node.js
+     * binary was compiled.
+     *
+     * Possible values are `'BE'` for big endian and `'LE'` for little endian.
+     * @since v0.9.4
+     */
+    function endianness(): "BE" | "LE";
+    /**
+     * Returns the scheduling priority for the process specified by `pid`. If `pid` is
+     * not provided or is `0`, the priority of the current process is returned.
+     * @since v10.10.0
+     * @param [pid=0] The process ID to retrieve scheduling priority for.
+     */
+    function getPriority(pid?: number): number;
+    /**
+     * Attempts to set the scheduling priority for the process specified by `pid`. If `pid` is not provided or is `0`, the process ID of the current process is used.
+     *
+     * The `priority` input must be an integer between `-20` (high priority) and `19` (low priority). Due to differences between Unix priority levels and Windows
+     * priority classes, `priority` is mapped to one of six priority constants in `os.constants.priority`. When retrieving a process priority level, this range
+     * mapping may cause the return value to be slightly different on Windows. To avoid
+     * confusion, set `priority` to one of the priority constants.
+     *
+     * On Windows, setting priority to `PRIORITY_HIGHEST` requires elevated user
+     * privileges. Otherwise the set priority will be silently reduced to `PRIORITY_HIGH`.
+     * @since v10.10.0
+     * @param [pid=0] The process ID to set scheduling priority for.
+     * @param priority The scheduling priority to assign to the process.
+     */
+    function setPriority(priority: number): void;
+    function setPriority(pid: number, priority: number): void;
+}
+declare module "os" {
+    export * from "node:os";
+}
diff --git a/mqtt-backend/node_modules/@types/node/package.json b/mqtt-backend/node_modules/@types/node/package.json
new file mode 100644
index 0000000..83b0e0a
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/package.json
@@ -0,0 +1,155 @@
+{
+    "name": "@types/node",
+    "version": "25.6.0",
+    "description": "TypeScript definitions for node",
+    "homepage": "https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/node",
+    "license": "MIT",
+    "contributors": [
+        {
+            "name": "Microsoft TypeScript",
+            "githubUsername": "Microsoft",
+            "url": "https://github.com/Microsoft"
+        },
+        {
+            "name": "Alberto Schiabel",
+            "githubUsername": "jkomyno",
+            "url": "https://github.com/jkomyno"
+        },
+        {
+            "name": "Andrew Makarov",
+            "githubUsername": "r3nya",
+            "url": "https://github.com/r3nya"
+        },
+        {
+            "name": "Benjamin Toueg",
+            "githubUsername": "btoueg",
+            "url": "https://github.com/btoueg"
+        },
+        {
+            "name": "David Junger",
+            "githubUsername": "touffy",
+            "url": "https://github.com/touffy"
+        },
+        {
+            "name": "Mohsen Azimi",
+            "githubUsername": "mohsen1",
+            "url": "https://github.com/mohsen1"
+        },
+        {
+            "name": "Nikita Galkin",
+            "githubUsername": "galkin",
+            "url": "https://github.com/galkin"
+        },
+        {
+            "name": "Sebastian Silbermann",
+            "githubUsername": "eps1lon",
+            "url": "https://github.com/eps1lon"
+        },
+        {
+            "name": "Wilco Bakker",
+            "githubUsername": "WilcoBakker",
+            "url": "https://github.com/WilcoBakker"
+        },
+        {
+            "name": "Marcin Kopacz",
+            "githubUsername": "chyzwar",
+            "url": "https://github.com/chyzwar"
+        },
+        {
+            "name": "Trivikram Kamat",
+            "githubUsername": "trivikr",
+            "url": "https://github.com/trivikr"
+        },
+        {
+            "name": "Junxiao Shi",
+            "githubUsername": "yoursunny",
+            "url": "https://github.com/yoursunny"
+        },
+        {
+            "name": "Ilia Baryshnikov",
+            "githubUsername": "qwelias",
+            "url": "https://github.com/qwelias"
+        },
+        {
+            "name": "ExE Boss",
+            "githubUsername": "ExE-Boss",
+            "url": "https://github.com/ExE-Boss"
+        },
+        {
+            "name": "Piotr Błażejewicz",
+            "githubUsername": "peterblazejewicz",
+            "url": "https://github.com/peterblazejewicz"
+        },
+        {
+            "name": "Anna Henningsen",
+            "githubUsername": "addaleax",
+            "url": "https://github.com/addaleax"
+        },
+        {
+            "name": "Victor Perin",
+            "githubUsername": "victorperin",
+            "url": "https://github.com/victorperin"
+        },
+        {
+            "name": "NodeJS Contributors",
+            "githubUsername": "NodeJS",
+            "url": "https://github.com/NodeJS"
+        },
+        {
+            "name": "Linus Unnebäck",
+            "githubUsername": "LinusU",
+            "url": "https://github.com/LinusU"
+        },
+        {
+            "name": "wafuwafu13",
+            "githubUsername": "wafuwafu13",
+            "url": "https://github.com/wafuwafu13"
+        },
+        {
+            "name": "Matteo Collina",
+            "githubUsername": "mcollina",
+            "url": "https://github.com/mcollina"
+        },
+        {
+            "name": "Dmitry Semigradsky",
+            "githubUsername": "Semigradsky",
+            "url": "https://github.com/Semigradsky"
+        },
+        {
+            "name": "René",
+            "githubUsername": "Renegade334",
+            "url": "https://github.com/Renegade334"
+        },
+        {
+            "name": "Yagiz Nizipli",
+            "githubUsername": "anonrig",
+            "url": "https://github.com/anonrig"
+        }
+    ],
+    "main": "",
+    "types": "index.d.ts",
+    "typesVersions": {
+        "<=5.6": {
+            "*": [
+                "ts5.6/*"
+            ]
+        },
+        "<=5.7": {
+            "*": [
+                "ts5.7/*"
+            ]
+        }
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/DefinitelyTyped/DefinitelyTyped.git",
+        "directory": "types/node"
+    },
+    "scripts": {},
+    "dependencies": {
+        "undici-types": "~7.19.0"
+    },
+    "peerDependencies": {},
+    "typesPublisherContentHash": "753bd9272f1c86686cc2d1bb435a7f033157f700201f64f0319742347e1ca060",
+    "typeScriptVersion": "5.3"
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@types/node/path.d.ts b/mqtt-backend/node_modules/@types/node/path.d.ts
new file mode 100644
index 0000000..ae8fd97
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/path.d.ts
@@ -0,0 +1,178 @@
+declare module "node:path" {
+    namespace path {
+        /**
+         * A parsed path object generated by path.parse() or consumed by path.format().
+         */
+        interface ParsedPath {
+            /**
+             * The root of the path such as '/' or 'c:\'
+             */
+            root: string;
+            /**
+             * The full directory path such as '/home/user/dir' or 'c:\path\dir'
+             */
+            dir: string;
+            /**
+             * The file name including extension (if any) such as 'index.html'
+             */
+            base: string;
+            /**
+             * The file extension (if any) such as '.html'
+             */
+            ext: string;
+            /**
+             * The file name without extension (if any) such as 'index'
+             */
+            name: string;
+        }
+        interface FormatInputPathObject {
+            /**
+             * The root of the path such as '/' or 'c:\'
+             */
+            root?: string | undefined;
+            /**
+             * The full directory path such as '/home/user/dir' or 'c:\path\dir'
+             */
+            dir?: string | undefined;
+            /**
+             * The file name including extension (if any) such as 'index.html'
+             */
+            base?: string | undefined;
+            /**
+             * The file extension (if any) such as '.html'
+             */
+            ext?: string | undefined;
+            /**
+             * The file name without extension (if any) such as 'index'
+             */
+            name?: string | undefined;
+        }
+        /**
+         * Normalize a string path, reducing '..' and '.' parts.
+         * When multiple slashes are found, they're replaced by a single one; when the path contains a trailing slash, it is preserved. On Windows backslashes are used. If the path is a zero-length string, '.' is returned, representing the current working directory.
+         *
+         * @param path string path to normalize.
+         * @throws {TypeError} if `path` is not a string.
+         */
+        function normalize(path: string): string;
+        /**
+         * Join all arguments together and normalize the resulting path.
+         *
+         * @param paths paths to join.
+         * @throws {TypeError} if any of the path segments is not a string.
+         */
+        function join(...paths: string[]): string;
+        /**
+         * The right-most parameter is considered {to}. Other parameters are considered an array of {from}.
+         *
+         * Starting from leftmost {from} parameter, resolves {to} to an absolute path.
+         *
+         * If {to} isn't already absolute, {from} arguments are prepended in right to left order,
+         * until an absolute path is found. If after using all {from} paths still no absolute path is found,
+         * the current working directory is used as well. The resulting path is normalized,
+         * and trailing slashes are removed unless the path gets resolved to the root directory.
+         *
+         * @param paths A sequence of paths or path segments.
+         * @throws {TypeError} if any of the arguments is not a string.
+         */
+        function resolve(...paths: string[]): string;
+        /**
+         * The `path.matchesGlob()` method determines if `path` matches the `pattern`.
+         * @param path The path to glob-match against.
+         * @param pattern The glob to check the path against.
+         * @returns Whether or not the `path` matched the `pattern`.
+         * @throws {TypeError} if `path` or `pattern` are not strings.
+         * @since v22.5.0
+         */
+        function matchesGlob(path: string, pattern: string): boolean;
+        /**
+         * Determines whether {path} is an absolute path. An absolute path will always resolve to the same location, regardless of the working directory.
+         *
+         * If the given {path} is a zero-length string, `false` will be returned.
+         *
+         * @param path path to test.
+         * @throws {TypeError} if `path` is not a string.
+         */
+        function isAbsolute(path: string): boolean;
+        /**
+         * Solve the relative path from {from} to {to} based on the current working directory.
+         * At times we have two absolute paths, and we need to derive the relative path from one to the other. This is actually the reverse transform of path.resolve.
+         *
+         * @throws {TypeError} if either `from` or `to` is not a string.
+         */
+        function relative(from: string, to: string): string;
+        /**
+         * Return the directory name of a path. Similar to the Unix dirname command.
+         *
+         * @param path the path to evaluate.
+         * @throws {TypeError} if `path` is not a string.
+         */
+        function dirname(path: string): string;
+        /**
+         * Return the last portion of a path. Similar to the Unix basename command.
+         * Often used to extract the file name from a fully qualified path.
+         *
+         * @param path the path to evaluate.
+         * @param suffix optionally, an extension to remove from the result.
+         * @throws {TypeError} if `path` is not a string or if `ext` is given and is not a string.
+         */
+        function basename(path: string, suffix?: string): string;
+        /**
+         * Return the extension of the path, from the last '.' to end of string in the last portion of the path.
+         * If there is no '.' in the last portion of the path or the first character of it is '.', then it returns an empty string.
+         *
+         * @param path the path to evaluate.
+         * @throws {TypeError} if `path` is not a string.
+         */
+        function extname(path: string): string;
+        /**
+         * The platform-specific file separator. '\\' or '/'.
+         */
+        const sep: "\\" | "/";
+        /**
+         * The platform-specific file delimiter. ';' or ':'.
+         */
+        const delimiter: ";" | ":";
+        /**
+         * Returns an object from a path string - the opposite of format().
+         *
+         * @param path path to evaluate.
+         * @throws {TypeError} if `path` is not a string.
+         */
+        function parse(path: string): ParsedPath;
+        /**
+         * Returns a path string from an object - the opposite of parse().
+         *
+         * @param pathObject path to evaluate.
+         */
+        function format(pathObject: FormatInputPathObject): string;
+        /**
+         * On Windows systems only, returns an equivalent namespace-prefixed path for the given path.
+         * If path is not a string, path will be returned without modifications.
+         * This method is meaningful only on Windows system.
+         * On POSIX systems, the method is non-operational and always returns path without modifications.
+         */
+        function toNamespacedPath(path: string): string;
+    }
+    namespace path {
+        export {
+            /**
+             * The `path.posix` property provides access to POSIX specific implementations of the `path` methods.
+             *
+             * The API is accessible via `require('node:path').posix` or `require('node:path/posix')`.
+             */
+            path as posix,
+            /**
+             * The `path.win32` property provides access to Windows-specific implementations of the `path` methods.
+             *
+             * The API is accessible via `require('node:path').win32` or `require('node:path/win32')`.
+             */
+            path as win32,
+        };
+    }
+    export = path;
+}
+declare module "path" {
+    import path = require("node:path");
+    export = path;
+}
diff --git a/mqtt-backend/node_modules/@types/node/path/posix.d.ts b/mqtt-backend/node_modules/@types/node/path/posix.d.ts
new file mode 100644
index 0000000..d60f629
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/path/posix.d.ts
@@ -0,0 +1,8 @@
+declare module "node:path/posix" {
+    import path = require("node:path");
+    export = path.posix;
+}
+declare module "path/posix" {
+    import path = require("path");
+    export = path.posix;
+}
diff --git a/mqtt-backend/node_modules/@types/node/path/win32.d.ts b/mqtt-backend/node_modules/@types/node/path/win32.d.ts
new file mode 100644
index 0000000..e6aa9fa
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/path/win32.d.ts
@@ -0,0 +1,8 @@
+declare module "node:path/win32" {
+    import path = require("node:path");
+    export = path.win32;
+}
+declare module "path/win32" {
+    import path = require("path");
+    export = path.win32;
+}
diff --git a/mqtt-backend/node_modules/@types/node/perf_hooks.d.ts b/mqtt-backend/node_modules/@types/node/perf_hooks.d.ts
new file mode 100644
index 0000000..46e725c
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/perf_hooks.d.ts
@@ -0,0 +1,612 @@
+declare module "node:perf_hooks" {
+    import { InternalEventTargetEventProperties } from "node:events";
+    // #region web types
+    type EntryType =
+        | "dns" // Node.js only
+        | "function" // Node.js only
+        | "gc" // Node.js only
+        | "http2" // Node.js only
+        | "http" // Node.js only
+        | "mark" // available on the Web
+        | "measure" // available on the Web
+        | "net" // Node.js only
+        | "node" // Node.js only
+        | "resource"; // available on the Web
+    interface ConnectionTimingInfo {
+        domainLookupStartTime: number;
+        domainLookupEndTime: number;
+        connectionStartTime: number;
+        connectionEndTime: number;
+        secureConnectionStartTime: number;
+        ALPNNegotiatedProtocol: string;
+    }
+    interface FetchTimingInfo {
+        startTime: number;
+        redirectStartTime: number;
+        redirectEndTime: number;
+        postRedirectStartTime: number;
+        finalServiceWorkerStartTime: number;
+        finalNetworkRequestStartTime: number;
+        finalNetworkResponseStartTime: number;
+        endTime: number;
+        finalConnectionTimingInfo: ConnectionTimingInfo | null;
+        encodedBodySize: number;
+        decodedBodySize: number;
+    }
+    type PerformanceEntryList = PerformanceEntry[];
+    interface PerformanceMarkOptions {
+        detail?: any;
+        startTime?: number;
+    }
+    interface PerformanceMeasureOptions {
+        detail?: any;
+        duration?: number;
+        end?: string | number;
+        start?: string | number;
+    }
+    interface PerformanceObserverCallback {
+        (entries: PerformanceObserverEntryList, observer: PerformanceObserver): void;
+    }
+    interface PerformanceObserverInit {
+        buffered?: boolean;
+        entryTypes?: EntryType[];
+        type?: EntryType;
+    }
+    // TODO: remove in next major
+    /** @deprecated Use `TimerifyOptions` instead. */
+    interface PerformanceTimerifyOptions extends TimerifyOptions {}
+    interface PerformanceEventMap {
+        "resourcetimingbufferfull": Event;
+    }
+    interface Performance extends EventTarget, InternalEventTargetEventProperties<PerformanceEventMap> {
+        readonly nodeTiming: PerformanceNodeTiming;
+        readonly timeOrigin: number;
+        clearMarks(markName?: string): void;
+        clearMeasures(measureName?: string): void;
+        clearResourceTimings(resourceTimingName?: string): void;
+        getEntries(): PerformanceEntryList;
+        getEntriesByName(name: string, type?: EntryType): PerformanceEntryList;
+        getEntriesByType(type: EntryType): PerformanceEntryList;
+        mark(markName: string, markOptions?: PerformanceMarkOptions): PerformanceMark;
+        markResourceTiming(
+            timingInfo: FetchTimingInfo,
+            requestedUrl: string,
+            initiatorType: string,
+            global: unknown,
+            cacheMode: string,
+            bodyInfo: unknown,
+            responseStatus: number,
+            deliveryType?: string,
+        ): PerformanceResourceTiming;
+        measure(measureName: string, startMark?: string, endMark?: string): PerformanceMeasure;
+        measure(measureName: string, options: PerformanceMeasureOptions, endMark?: string): PerformanceMeasure;
+        now(): number;
+        setResourceTimingBufferSize(maxSize: number): void;
+        toJSON(): any;
+        addEventListener<K extends keyof PerformanceEventMap>(
+            type: K,
+            listener: (ev: PerformanceEventMap[K]) => void,
+            options?: AddEventListenerOptions | boolean,
+        ): void;
+        addEventListener(
+            type: string,
+            listener: EventListener | EventListenerObject,
+            options?: AddEventListenerOptions | boolean,
+        ): void;
+        removeEventListener<K extends keyof PerformanceEventMap>(
+            type: K,
+            listener: (ev: PerformanceEventMap[K]) => void,
+            options?: EventListenerOptions | boolean,
+        ): void;
+        removeEventListener(
+            type: string,
+            listener: EventListener | EventListenerObject,
+            options?: EventListenerOptions | boolean,
+        ): void;
+        /**
+         * This is an alias of `perf_hooks.eventLoopUtilization()`.
+         *
+         * _This property is an extension by Node.js. It is not available in Web browsers._
+         * @since v14.10.0, v12.19.0
+         * @param utilization1 The result of a previous call to
+         * `eventLoopUtilization()`.
+         * @param utilization2 The result of a previous call to
+         * `eventLoopUtilization()` prior to `utilization1`.
+         */
+        eventLoopUtilization(
+            utilization1?: EventLoopUtilization,
+            utilization2?: EventLoopUtilization,
+        ): EventLoopUtilization;
+        /**
+         * This is an alias of `perf_hooks.timerify()`.
+         *
+         * _This property is an extension by Node.js. It is not available in Web browsers._
+         * @since v8.5.0
+         */
+        timerify<T extends (...args: any[]) => any>(fn: T, options?: TimerifyOptions): T;
+    }
+    var Performance: {
+        prototype: Performance;
+        new(): Performance;
+    };
+    interface PerformanceEntry {
+        readonly duration: number;
+        readonly entryType: EntryType;
+        readonly name: string;
+        readonly startTime: number;
+        toJSON(): any;
+    }
+    var PerformanceEntry: {
+        prototype: PerformanceEntry;
+        new(): PerformanceEntry;
+    };
+    interface PerformanceMark extends PerformanceEntry {
+        readonly detail: any;
+        readonly entryType: "mark";
+    }
+    var PerformanceMark: {
+        prototype: PerformanceMark;
+        new(markName: string, markOptions?: PerformanceMarkOptions): PerformanceMark;
+    };
+    interface PerformanceMeasure extends PerformanceEntry {
+        readonly detail: any;
+        readonly entryType: "measure";
+    }
+    var PerformanceMeasure: {
+        prototype: PerformanceMeasure;
+        new(): PerformanceMeasure;
+    };
+    interface PerformanceObserver {
+        disconnect(): void;
+        observe(options: PerformanceObserverInit): void;
+        takeRecords(): PerformanceEntryList;
+    }
+    var PerformanceObserver: {
+        prototype: PerformanceObserver;
+        new(callback: PerformanceObserverCallback): PerformanceObserver;
+        readonly supportedEntryTypes: readonly EntryType[];
+    };
+    interface PerformanceObserverEntryList {
+        getEntries(): PerformanceEntryList;
+        getEntriesByName(name: string, type?: EntryType): PerformanceEntryList;
+        getEntriesByType(type: EntryType): PerformanceEntryList;
+    }
+    var PerformanceObserverEntryList: {
+        prototype: PerformanceObserverEntryList;
+        new(): PerformanceObserverEntryList;
+    };
+    interface PerformanceResourceTiming extends PerformanceEntry {
+        readonly connectEnd: number;
+        readonly connectStart: number;
+        readonly decodedBodySize: number;
+        readonly domainLookupEnd: number;
+        readonly domainLookupStart: number;
+        readonly encodedBodySize: number;
+        readonly entryType: "resource";
+        readonly fetchStart: number;
+        readonly initiatorType: string;
+        readonly nextHopProtocol: string;
+        readonly redirectEnd: number;
+        readonly redirectStart: number;
+        readonly requestStart: number;
+        readonly responseEnd: number;
+        readonly responseStart: number;
+        readonly responseStatus: number;
+        readonly secureConnectionStart: number;
+        readonly transferSize: number;
+        readonly workerStart: number;
+        toJSON(): any;
+    }
+    var PerformanceResourceTiming: {
+        prototype: PerformanceResourceTiming;
+        new(): PerformanceResourceTiming;
+    };
+    var performance: Performance;
+    // #endregion
+    /**
+     * _This class is an extension by Node.js. It is not available in Web browsers._
+     *
+     * Provides detailed Node.js timing data.
+     *
+     * The constructor of this class is not exposed to users directly.
+     * @since v19.0.0
+     */
+    class PerformanceNodeEntry extends PerformanceEntry {
+        /**
+         * Additional detail specific to the `entryType`.
+         * @since v16.0.0
+         */
+        readonly detail: any;
+        readonly entryType: "dns" | "function" | "gc" | "http2" | "http" | "net" | "node";
+    }
+    interface UVMetrics {
+        /**
+         * Number of event loop iterations.
+         */
+        readonly loopCount: number;
+        /**
+         * Number of events that have been processed by the event handler.
+         */
+        readonly events: number;
+        /**
+         * Number of events that were waiting to be processed when the event provider was called.
+         */
+        readonly eventsWaiting: number;
+    }
+    /**
+     * _This property is an extension by Node.js. It is not available in Web browsers._
+     *
+     * Provides timing details for Node.js itself. The constructor of this class
+     * is not exposed to users.
+     * @since v8.5.0
+     */
+    interface PerformanceNodeTiming extends PerformanceEntry {
+        /**
+         * The high resolution millisecond timestamp at which the Node.js process
+         * completed bootstrapping. If bootstrapping has not yet finished, the property
+         * has the value of -1.
+         * @since v8.5.0
+         */
+        readonly bootstrapComplete: number;
+        readonly entryType: "node";
+        /**
+         * The high resolution millisecond timestamp at which the Node.js environment was
+         * initialized.
+         * @since v8.5.0
+         */
+        readonly environment: number;
+        /**
+         * The high resolution millisecond timestamp of the amount of time the event loop
+         * has been idle within the event loop's event provider (e.g. `epoll_wait`). This
+         * does not take CPU usage into consideration. If the event loop has not yet
+         * started (e.g., in the first tick of the main script), the property has the
+         * value of 0.
+         * @since v14.10.0, v12.19.0
+         */
+        readonly idleTime: number;
+        /**
+         * The high resolution millisecond timestamp at which the Node.js event loop
+         * exited. If the event loop has not yet exited, the property has the value of -1\.
+         * It can only have a value of not -1 in a handler of the `'exit'` event.
+         * @since v8.5.0
+         */
+        readonly loopExit: number;
+        /**
+         * The high resolution millisecond timestamp at which the Node.js event loop
+         * started. If the event loop has not yet started (e.g., in the first tick of the
+         * main script), the property has the value of -1.
+         * @since v8.5.0
+         */
+        readonly loopStart: number;
+        /**
+         * The high resolution millisecond timestamp at which the Node.js process was initialized.
+         * @since v8.5.0
+         */
+        readonly nodeStart: number;
+        /**
+         * This is a wrapper to the `uv_metrics_info` function.
+         * It returns the current set of event loop metrics.
+         *
+         * It is recommended to use this property inside a function whose execution was
+         * scheduled using `setImmediate` to avoid collecting metrics before finishing all
+         * operations scheduled during the current loop iteration.
+         * @since v22.8.0, v20.18.0
+         */
+        readonly uvMetricsInfo: UVMetrics;
+        /**
+         * The high resolution millisecond timestamp at which the V8 platform was
+         * initialized.
+         * @since v8.5.0
+         */
+        readonly v8Start: number;
+    }
+    namespace constants {
+        const NODE_PERFORMANCE_GC_MAJOR: number;
+        const NODE_PERFORMANCE_GC_MINOR: number;
+        const NODE_PERFORMANCE_GC_INCREMENTAL: number;
+        const NODE_PERFORMANCE_GC_WEAKCB: number;
+        const NODE_PERFORMANCE_GC_FLAGS_NO: number;
+        const NODE_PERFORMANCE_GC_FLAGS_CONSTRUCT_RETAINED: number;
+        const NODE_PERFORMANCE_GC_FLAGS_FORCED: number;
+        const NODE_PERFORMANCE_GC_FLAGS_SYNCHRONOUS_PHANTOM_PROCESSING: number;
+        const NODE_PERFORMANCE_GC_FLAGS_ALL_AVAILABLE_GARBAGE: number;
+        const NODE_PERFORMANCE_GC_FLAGS_ALL_EXTERNAL_MEMORY: number;
+        const NODE_PERFORMANCE_GC_FLAGS_SCHEDULE_IDLE: number;
+    }
+    interface EventLoopMonitorOptions {
+        /**
+         * The sampling rate in milliseconds.
+         * Must be greater than zero.
+         * @default 10
+         */
+        resolution?: number | undefined;
+    }
+    interface Histogram {
+        /**
+         * The number of samples recorded by the histogram.
+         * @since v17.4.0, v16.14.0
+         */
+        readonly count: number;
+        /**
+         * The number of samples recorded by the histogram.
+         * v17.4.0, v16.14.0
+         */
+        readonly countBigInt: bigint;
+        /**
+         * The number of times the event loop delay exceeded the maximum 1 hour event
+         * loop delay threshold.
+         * @since v11.10.0
+         */
+        readonly exceeds: number;
+        /**
+         * The number of times the event loop delay exceeded the maximum 1 hour event loop delay threshold.
+         * @since v17.4.0, v16.14.0
+         */
+        readonly exceedsBigInt: bigint;
+        /**
+         * The maximum recorded event loop delay.
+         * @since v11.10.0
+         */
+        readonly max: number;
+        /**
+         * The maximum recorded event loop delay.
+         * v17.4.0, v16.14.0
+         */
+        readonly maxBigInt: number;
+        /**
+         * The mean of the recorded event loop delays.
+         * @since v11.10.0
+         */
+        readonly mean: number;
+        /**
+         * The minimum recorded event loop delay.
+         * @since v11.10.0
+         */
+        readonly min: number;
+        /**
+         * The minimum recorded event loop delay.
+         * v17.4.0, v16.14.0
+         */
+        readonly minBigInt: bigint;
+        /**
+         * Returns the value at the given percentile.
+         * @since v11.10.0
+         * @param percentile A percentile value in the range (0, 100].
+         */
+        percentile(percentile: number): number;
+        /**
+         * Returns the value at the given percentile.
+         * @since v17.4.0, v16.14.0
+         * @param percentile A percentile value in the range (0, 100].
+         */
+        percentileBigInt(percentile: number): bigint;
+        /**
+         * Returns a `Map` object detailing the accumulated percentile distribution.
+         * @since v11.10.0
+         */
+        readonly percentiles: Map<number, number>;
+        /**
+         * Returns a `Map` object detailing the accumulated percentile distribution.
+         * @since v17.4.0, v16.14.0
+         */
+        readonly percentilesBigInt: Map<bigint, bigint>;
+        /**
+         * Resets the collected histogram data.
+         * @since v11.10.0
+         */
+        reset(): void;
+        /**
+         * The standard deviation of the recorded event loop delays.
+         * @since v11.10.0
+         */
+        readonly stddev: number;
+    }
+    interface IntervalHistogram extends Histogram {
+        /**
+         * Enables the update interval timer. Returns `true` if the timer was
+         * started, `false` if it was already started.
+         * @since v11.10.0
+         */
+        enable(): boolean;
+        /**
+         * Disables the update interval timer. Returns `true` if the timer was
+         * stopped, `false` if it was already stopped.
+         * @since v11.10.0
+         */
+        disable(): boolean;
+        /**
+         * Disables the update interval timer when the histogram is disposed.
+         *
+         * ```js
+         * const { monitorEventLoopDelay } = require('node:perf_hooks');
+         * {
+         *   using hist = monitorEventLoopDelay({ resolution: 20 });
+         *   hist.enable();
+         *   // The histogram will be disabled when the block is exited.
+         * }
+         * ```
+         * @since v24.2.0
+         */
+        [Symbol.dispose](): void;
+    }
+    interface RecordableHistogram extends Histogram {
+        /**
+         * @since v15.9.0, v14.18.0
+         * @param val The amount to record in the histogram.
+         */
+        record(val: number | bigint): void;
+        /**
+         * Calculates the amount of time (in nanoseconds) that has passed since the
+         * previous call to `recordDelta()` and records that amount in the histogram.
+         * @since v15.9.0, v14.18.0
+         */
+        recordDelta(): void;
+        /**
+         * Adds the values from `other` to this histogram.
+         * @since v17.4.0, v16.14.0
+         */
+        add(other: RecordableHistogram): void;
+    }
+    interface EventLoopUtilization {
+        idle: number;
+        active: number;
+        utilization: number;
+    }
+    /**
+     * The `eventLoopUtilization()` function returns an object that contains the
+     * cumulative duration of time the event loop has been both idle and active as a
+     * high resolution milliseconds timer. The `utilization` value is the calculated
+     * Event Loop Utilization (ELU).
+     *
+     * If bootstrapping has not yet finished on the main thread the properties have
+     * the value of `0`. The ELU is immediately available on [Worker threads](https://nodejs.org/docs/latest-v25.x/api/worker_threads.html#worker-threads) since
+     * bootstrap happens within the event loop.
+     *
+     * Both `utilization1` and `utilization2` are optional parameters.
+     *
+     * If `utilization1` is passed, then the delta between the current call's `active`
+     * and `idle` times, as well as the corresponding `utilization` value are
+     * calculated and returned (similar to `process.hrtime()`).
+     *
+     * If `utilization1` and `utilization2` are both passed, then the delta is
+     * calculated between the two arguments. This is a convenience option because,
+     * unlike `process.hrtime()`, calculating the ELU is more complex than a
+     * single subtraction.
+     *
+     * ELU is similar to CPU utilization, except that it only measures event loop
+     * statistics and not CPU usage. It represents the percentage of time the event
+     * loop has spent outside the event loop's event provider (e.g. `epoll_wait`).
+     * No other CPU idle time is taken into consideration. The following is an example
+     * of how a mostly idle process will have a high ELU.
+     *
+     * ```js
+     * import { eventLoopUtilization } from 'node:perf_hooks';
+     * import { spawnSync } from 'node:child_process';
+     *
+     * setImmediate(() => {
+     *   const elu = eventLoopUtilization();
+     *   spawnSync('sleep', ['5']);
+     *   console.log(eventLoopUtilization(elu).utilization);
+     * });
+     * ```
+     *
+     * Although the CPU is mostly idle while running this script, the value of
+     * `utilization` is `1`. This is because the call to
+     * `child_process.spawnSync()` blocks the event loop from proceeding.
+     *
+     * Passing in a user-defined object instead of the result of a previous call to
+     * `eventLoopUtilization()` will lead to undefined behavior. The return values
+     * are not guaranteed to reflect any correct state of the event loop.
+     * @since v25.2.0
+     * @param utilization1 The result of a previous call to
+     * `eventLoopUtilization()`.
+     * @param utilization2 The result of a previous call to
+     * `eventLoopUtilization()` prior to `utilization1`.
+     */
+    function eventLoopUtilization(
+        utilization1?: EventLoopUtilization,
+        utilization2?: EventLoopUtilization,
+    ): EventLoopUtilization;
+    /**
+     * _This property is an extension by Node.js. It is not available in Web browsers._
+     *
+     * Creates an `IntervalHistogram` object that samples and reports the event loop
+     * delay over time. The delays will be reported in nanoseconds.
+     *
+     * Using a timer to detect approximate event loop delay works because the
+     * execution of timers is tied specifically to the lifecycle of the libuv
+     * event loop. That is, a delay in the loop will cause a delay in the execution
+     * of the timer, and those delays are specifically what this API is intended to
+     * detect.
+     *
+     * ```js
+     * import { monitorEventLoopDelay } from 'node:perf_hooks';
+     * const h = monitorEventLoopDelay({ resolution: 20 });
+     * h.enable();
+     * // Do something.
+     * h.disable();
+     * console.log(h.min);
+     * console.log(h.max);
+     * console.log(h.mean);
+     * console.log(h.stddev);
+     * console.log(h.percentiles);
+     * console.log(h.percentile(50));
+     * console.log(h.percentile(99));
+     * ```
+     * @since v11.10.0
+     */
+    function monitorEventLoopDelay(options?: EventLoopMonitorOptions): IntervalHistogram;
+    interface TimerifyOptions {
+        /**
+         * A histogram object created using
+         * `perf_hooks.createHistogram()` that will record runtime durations in
+         * nanoseconds.
+         */
+        histogram?: RecordableHistogram | undefined;
+    }
+    /**
+     * _This property is an extension by Node.js. It is not available in Web browsers._
+     *
+     * Wraps a function within a new function that measures the running time of the
+     * wrapped function. A `PerformanceObserver` must be subscribed to the `'function'`
+     * event type in order for the timing details to be accessed.
+     *
+     * ```js
+     * import { timerify, performance, PerformanceObserver } from 'node:perf_hooks';
+     *
+     * function someFunction() {
+     *   console.log('hello world');
+     * }
+     *
+     * const wrapped = timerify(someFunction);
+     *
+     * const obs = new PerformanceObserver((list) => {
+     *   console.log(list.getEntries()[0].duration);
+     *
+     *   performance.clearMarks();
+     *   performance.clearMeasures();
+     *   obs.disconnect();
+     * });
+     * obs.observe({ entryTypes: ['function'] });
+     *
+     * // A performance timeline entry will be created
+     * wrapped();
+     * ```
+     *
+     * If the wrapped function returns a promise, a finally handler will be attached
+     * to the promise and the duration will be reported once the finally handler is
+     * invoked.
+     * @since v25.2.0
+     */
+    function timerify<T extends (...args: any[]) => any>(fn: T, options?: TimerifyOptions): T;
+    interface CreateHistogramOptions {
+        /**
+         * The minimum recordable value. Must be an integer value greater than 0.
+         * @default 1
+         */
+        lowest?: number | bigint | undefined;
+        /**
+         * The maximum recordable value. Must be an integer value greater than min.
+         * @default Number.MAX_SAFE_INTEGER
+         */
+        highest?: number | bigint | undefined;
+        /**
+         * The number of accuracy digits. Must be a number between 1 and 5.
+         * @default 3
+         */
+        figures?: number | undefined;
+    }
+    /**
+     * Returns a `RecordableHistogram`.
+     * @since v15.9.0, v14.18.0
+     */
+    function createHistogram(options?: CreateHistogramOptions): RecordableHistogram;
+    // TODO: remove these in a future major
+    /** @deprecated Use the canonical `PerformanceMarkOptions` instead. */
+    interface MarkOptions extends PerformanceMarkOptions {}
+    /** @deprecated Use the canonical `PerformanceMeasureOptions` instead. */
+    interface MeasureOptions extends PerformanceMeasureOptions {}
+}
+declare module "perf_hooks" {
+    export * from "node:perf_hooks";
+}
diff --git a/mqtt-backend/node_modules/@types/node/process.d.ts b/mqtt-backend/node_modules/@types/node/process.d.ts
new file mode 100644
index 0000000..ea50c94
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/process.d.ts
@@ -0,0 +1,2175 @@
+declare module "node:process" {
+    import { Control, MessageOptions, SendHandle } from "node:child_process";
+    import { PathLike } from "node:fs";
+    import * as tty from "node:tty";
+    import { Worker } from "node:worker_threads";
+    interface BuiltInModule {
+        "assert": typeof import("assert");
+        "node:assert": typeof import("node:assert");
+        "assert/strict": typeof import("assert/strict");
+        "node:assert/strict": typeof import("node:assert/strict");
+        "async_hooks": typeof import("async_hooks");
+        "node:async_hooks": typeof import("node:async_hooks");
+        "buffer": typeof import("buffer");
+        "node:buffer": typeof import("node:buffer");
+        "child_process": typeof import("child_process");
+        "node:child_process": typeof import("node:child_process");
+        "cluster": typeof import("cluster");
+        "node:cluster": typeof import("node:cluster");
+        "console": typeof import("console");
+        "node:console": typeof import("node:console");
+        "constants": typeof import("constants");
+        "node:constants": typeof import("node:constants");
+        "crypto": typeof import("crypto");
+        "node:crypto": typeof import("node:crypto");
+        "dgram": typeof import("dgram");
+        "node:dgram": typeof import("node:dgram");
+        "diagnostics_channel": typeof import("diagnostics_channel");
+        "node:diagnostics_channel": typeof import("node:diagnostics_channel");
+        "dns": typeof import("dns");
+        "node:dns": typeof import("node:dns");
+        "dns/promises": typeof import("dns/promises");
+        "node:dns/promises": typeof import("node:dns/promises");
+        "domain": typeof import("domain");
+        "node:domain": typeof import("node:domain");
+        "events": typeof import("events");
+        "node:events": typeof import("node:events");
+        "fs": typeof import("fs");
+        "node:fs": typeof import("node:fs");
+        "fs/promises": typeof import("fs/promises");
+        "node:fs/promises": typeof import("node:fs/promises");
+        "http": typeof import("http");
+        "node:http": typeof import("node:http");
+        "http2": typeof import("http2");
+        "node:http2": typeof import("node:http2");
+        "https": typeof import("https");
+        "node:https": typeof import("node:https");
+        "inspector": typeof import("inspector");
+        "node:inspector": typeof import("node:inspector");
+        "inspector/promises": typeof import("inspector/promises");
+        "node:inspector/promises": typeof import("node:inspector/promises");
+        "module": typeof import("module");
+        "node:module": typeof import("node:module");
+        "net": typeof import("net");
+        "node:net": typeof import("node:net");
+        "os": typeof import("os");
+        "node:os": typeof import("node:os");
+        "path": typeof import("path");
+        "node:path": typeof import("node:path");
+        "path/posix": typeof import("path/posix");
+        "node:path/posix": typeof import("node:path/posix");
+        "path/win32": typeof import("path/win32");
+        "node:path/win32": typeof import("node:path/win32");
+        "perf_hooks": typeof import("perf_hooks");
+        "node:perf_hooks": typeof import("node:perf_hooks");
+        "process": typeof import("process");
+        "node:process": typeof import("node:process");
+        "punycode": typeof import("punycode");
+        "node:punycode": typeof import("node:punycode");
+        "querystring": typeof import("querystring");
+        "node:querystring": typeof import("node:querystring");
+        "node:quic": typeof import("node:quic");
+        "readline": typeof import("readline");
+        "node:readline": typeof import("node:readline");
+        "readline/promises": typeof import("readline/promises");
+        "node:readline/promises": typeof import("node:readline/promises");
+        "repl": typeof import("repl");
+        "node:repl": typeof import("node:repl");
+        "node:sea": typeof import("node:sea");
+        "node:sqlite": typeof import("node:sqlite");
+        "stream": typeof import("stream");
+        "node:stream": typeof import("node:stream");
+        "stream/consumers": typeof import("stream/consumers");
+        "node:stream/consumers": typeof import("node:stream/consumers");
+        "stream/promises": typeof import("stream/promises");
+        "node:stream/promises": typeof import("node:stream/promises");
+        "stream/web": typeof import("stream/web");
+        "node:stream/web": typeof import("node:stream/web");
+        "string_decoder": typeof import("string_decoder");
+        "node:string_decoder": typeof import("node:string_decoder");
+        "node:test": typeof import("node:test");
+        "node:test/reporters": typeof import("node:test/reporters");
+        "timers": typeof import("timers");
+        "node:timers": typeof import("node:timers");
+        "timers/promises": typeof import("timers/promises");
+        "node:timers/promises": typeof import("node:timers/promises");
+        "tls": typeof import("tls");
+        "node:tls": typeof import("node:tls");
+        "trace_events": typeof import("trace_events");
+        "node:trace_events": typeof import("node:trace_events");
+        "tty": typeof import("tty");
+        "node:tty": typeof import("node:tty");
+        "url": typeof import("url");
+        "node:url": typeof import("node:url");
+        "util": typeof import("util");
+        "node:util": typeof import("node:util");
+        "util/types": typeof import("util/types");
+        "node:util/types": typeof import("node:util/types");
+        "v8": typeof import("v8");
+        "node:v8": typeof import("node:v8");
+        "vm": typeof import("vm");
+        "node:vm": typeof import("node:vm");
+        "wasi": typeof import("wasi");
+        "node:wasi": typeof import("node:wasi");
+        "worker_threads": typeof import("worker_threads");
+        "node:worker_threads": typeof import("node:worker_threads");
+        "zlib": typeof import("zlib");
+        "node:zlib": typeof import("node:zlib");
+    }
+    type SignalsEventMap = { [S in NodeJS.Signals]: [signal: S] };
+    interface ProcessEventMap extends SignalsEventMap {
+        "beforeExit": [code: number];
+        "disconnect": [];
+        "exit": [code: number];
+        "message": [
+            message: object | boolean | number | string | null,
+            sendHandle: SendHandle | undefined,
+        ];
+        "rejectionHandled": [promise: Promise<unknown>];
+        "uncaughtException": [error: Error, origin: NodeJS.UncaughtExceptionOrigin];
+        "uncaughtExceptionMonitor": [error: Error, origin: NodeJS.UncaughtExceptionOrigin];
+        "unhandledRejection": [reason: unknown, promise: Promise<unknown>];
+        "warning": [warning: Error];
+        "worker": [worker: Worker];
+        "workerMessage": [value: any, source: number];
+    }
+    global {
+        var process: NodeJS.Process;
+        namespace process {
+            export { ProcessEventMap };
+        }
+        namespace NodeJS {
+            // this namespace merge is here because these are specifically used
+            // as the type for process.stdin, process.stdout, and process.stderr.
+            // they can't live in tty.d.ts because we need to disambiguate the imported name.
+            interface ReadStream extends tty.ReadStream {}
+            interface WriteStream extends tty.WriteStream {}
+            interface MemoryUsageFn {
+                /**
+                 * The `process.memoryUsage()` method iterate over each page to gather informations about memory
+                 * usage which can be slow depending on the program memory allocations.
+                 */
+                (): MemoryUsage;
+                /**
+                 * method returns an integer representing the Resident Set Size (RSS) in bytes.
+                 */
+                rss(): number;
+            }
+            interface MemoryUsage {
+                /**
+                 * Resident Set Size, is the amount of space occupied in the main memory device (that is a subset of the total allocated memory) for the
+                 * process, including all C++ and JavaScript objects and code.
+                 */
+                rss: number;
+                /**
+                 * Refers to V8's memory usage.
+                 */
+                heapTotal: number;
+                /**
+                 * Refers to V8's memory usage.
+                 */
+                heapUsed: number;
+                external: number;
+                /**
+                 * Refers to memory allocated for `ArrayBuffer`s and `SharedArrayBuffer`s, including all Node.js Buffers. This is also included
+                 * in the external value. When Node.js is used as an embedded library, this value may be `0` because allocations for `ArrayBuffer`s
+                 * may not be tracked in that case.
+                 */
+                arrayBuffers: number;
+            }
+            interface CpuUsage {
+                user: number;
+                system: number;
+            }
+            interface ProcessRelease {
+                name: string;
+                sourceUrl?: string | undefined;
+                headersUrl?: string | undefined;
+                libUrl?: string | undefined;
+                lts?: string | undefined;
+            }
+            interface ProcessFeatures {
+                /**
+                 * A boolean value that is `true` if the current Node.js build is caching builtin modules.
+                 * @since v12.0.0
+                 */
+                readonly cached_builtins: boolean;
+                /**
+                 * A boolean value that is `true` if the current Node.js build is a debug build.
+                 * @since v0.5.5
+                 */
+                readonly debug: boolean;
+                /**
+                 * A boolean value that is `true` if the current Node.js build includes the inspector.
+                 * @since v11.10.0
+                 */
+                readonly inspector: boolean;
+                /**
+                 * A boolean value that is `true` if the current Node.js build includes support for IPv6.
+                 *
+                 * Since all Node.js builds have IPv6 support, this value is always `true`.
+                 * @since v0.5.3
+                 * @deprecated This property is always true, and any checks based on it are redundant.
+                 */
+                readonly ipv6: boolean;
+                /**
+                 * A boolean value that is `true` if the current Node.js build supports
+                 * [loading ECMAScript modules using `require()`](https://nodejs.org/docs/latest-v25.x/api/modules.md#loading-ecmascript-modules-using-require).
+                 * @since v22.10.0
+                 */
+                readonly require_module: boolean;
+                /**
+                 * A boolean value that is `true` if the current Node.js build includes support for TLS.
+                 * @since v0.5.3
+                 */
+                readonly tls: boolean;
+                /**
+                 * A boolean value that is `true` if the current Node.js build includes support for ALPN in TLS.
+                 *
+                 * In Node.js 11.0.0 and later versions, the OpenSSL dependencies feature unconditional ALPN support.
+                 * This value is therefore identical to that of `process.features.tls`.
+                 * @since v4.8.0
+                 * @deprecated Use `process.features.tls` instead.
+                 */
+                readonly tls_alpn: boolean;
+                /**
+                 * A boolean value that is `true` if the current Node.js build includes support for OCSP in TLS.
+                 *
+                 * In Node.js 11.0.0 and later versions, the OpenSSL dependencies feature unconditional OCSP support.
+                 * This value is therefore identical to that of `process.features.tls`.
+                 * @since v0.11.13
+                 * @deprecated Use `process.features.tls` instead.
+                 */
+                readonly tls_ocsp: boolean;
+                /**
+                 * A boolean value that is `true` if the current Node.js build includes support for SNI in TLS.
+                 *
+                 * In Node.js 11.0.0 and later versions, the OpenSSL dependencies feature unconditional SNI support.
+                 * This value is therefore identical to that of `process.features.tls`.
+                 * @since v0.5.3
+                 * @deprecated Use `process.features.tls` instead.
+                 */
+                readonly tls_sni: boolean;
+                /**
+                 * A value that is `"strip"` by default,
+                 * `"transform"` if Node.js is run with `--experimental-transform-types`, and `false` if
+                 * Node.js is run with `--no-strip-types`.
+                 * @since v22.10.0
+                 */
+                readonly typescript: "strip" | "transform" | false;
+                /**
+                 * A boolean value that is `true` if the current Node.js build includes support for libuv.
+                 *
+                 * Since it's not possible to build Node.js without libuv, this value is always `true`.
+                 * @since v0.5.3
+                 * @deprecated This property is always true, and any checks based on it are redundant.
+                 */
+                readonly uv: boolean;
+            }
+            interface ProcessVersions extends Dict<string> {
+                http_parser: string;
+                node: string;
+                v8: string;
+                ares: string;
+                uv: string;
+                zlib: string;
+                modules: string;
+                openssl: string;
+            }
+            type Platform =
+                | "aix"
+                | "android"
+                | "darwin"
+                | "freebsd"
+                | "haiku"
+                | "linux"
+                | "openbsd"
+                | "sunos"
+                | "win32"
+                | "cygwin"
+                | "netbsd";
+            type Architecture =
+                | "arm"
+                | "arm64"
+                | "ia32"
+                | "loong64"
+                | "mips"
+                | "mipsel"
+                | "ppc64"
+                | "riscv64"
+                | "s390x"
+                | "x64";
+            type Signals =
+                | "SIGABRT"
+                | "SIGALRM"
+                | "SIGBUS"
+                | "SIGCHLD"
+                | "SIGCONT"
+                | "SIGFPE"
+                | "SIGHUP"
+                | "SIGILL"
+                | "SIGINT"
+                | "SIGIO"
+                | "SIGIOT"
+                | "SIGKILL"
+                | "SIGPIPE"
+                | "SIGPOLL"
+                | "SIGPROF"
+                | "SIGPWR"
+                | "SIGQUIT"
+                | "SIGSEGV"
+                | "SIGSTKFLT"
+                | "SIGSTOP"
+                | "SIGSYS"
+                | "SIGTERM"
+                | "SIGTRAP"
+                | "SIGTSTP"
+                | "SIGTTIN"
+                | "SIGTTOU"
+                | "SIGUNUSED"
+                | "SIGURG"
+                | "SIGUSR1"
+                | "SIGUSR2"
+                | "SIGVTALRM"
+                | "SIGWINCH"
+                | "SIGXCPU"
+                | "SIGXFSZ"
+                | "SIGBREAK"
+                | "SIGLOST"
+                | "SIGINFO";
+            type UncaughtExceptionOrigin = "uncaughtException" | "unhandledRejection";
+            /**
+             * @deprecated Global listener types will be removed in a future version.
+             * Callbacks passed directly to `process`'s EventEmitter methods
+             * have their parameter types inferred automatically.
+             *
+             * `process` event types are also available via `ProcessEventMap`:
+             *
+             * ```ts
+             * import type { ProcessEventMap } from 'node:process';
+             * const listener = (...args: ProcessEventMap['beforeExit']) => { ... };
+             * ```
+             */
+            type BeforeExitListener = (...args: ProcessEventMap["beforeExit"]) => void;
+            /**
+             * @deprecated Global listener types will be removed in a future version.
+             * Callbacks passed directly to `process`'s EventEmitter methods
+             * have their parameter types inferred automatically.
+             *
+             * `process` event types are also available via `ProcessEventMap`:
+             *
+             * ```ts
+             * import type { ProcessEventMap } from 'node:process';
+             * const listener = (...args: ProcessEventMap['disconnect']) => { ... };
+             * ```
+             */
+            type DisconnectListener = (...args: ProcessEventMap["disconnect"]) => void;
+            /**
+             * @deprecated Global listener types will be removed in a future version.
+             * Callbacks passed directly to `process`'s EventEmitter methods
+             * have their parameter types inferred automatically.
+             *
+             * `process` event types are also available via `ProcessEventMap`:
+             *
+             * ```ts
+             * import type { ProcessEventMap } from 'node:process';
+             * const listener = (...args: ProcessEventMap['exit']) => { ... };
+             * ```
+             */
+            type ExitListener = (...args: ProcessEventMap["exit"]) => void;
+            /**
+             * @deprecated Global listener types will be removed in a future version.
+             * Callbacks passed directly to `process`'s EventEmitter methods
+             * have their parameter types inferred automatically.
+             *
+             * `process` event types are also available via `ProcessEventMap`:
+             *
+             * ```ts
+             * import type { ProcessEventMap } from 'node:process';
+             * const listener = (...args: ProcessEventMap['message']) => { ... };
+             * ```
+             */
+            type MessageListener = (...args: ProcessEventMap["message"]) => void;
+            /**
+             * @deprecated Global listener types will be removed in a future version.
+             * Callbacks passed directly to `process`'s EventEmitter methods
+             * have their parameter types inferred automatically.
+             *
+             * `process` event types are also available via `ProcessEventMap`:
+             *
+             * ```ts
+             * import type { ProcessEventMap } from 'node:process';
+             * const listener = (...args: ProcessEventMap['rejectionHandled']) => { ... };
+             * ```
+             */
+            type RejectionHandledListener = (...args: ProcessEventMap["rejectionHandled"]) => void;
+            /**
+             * @deprecated Global listener types will be removed in a future version.
+             * Callbacks passed directly to `process`'s EventEmitter methods
+             * have their parameter types inferred automatically.
+             */
+            type SignalsListener = (signal: Signals) => void;
+            /**
+             * @deprecated Global listener types will be removed in a future version.
+             * Callbacks passed directly to `process`'s EventEmitter methods
+             * have their parameter types inferred automatically.
+             *
+             * `process` event types are also available via `ProcessEventMap`:
+             *
+             * ```ts
+             * import type { ProcessEventMap } from 'node:process';
+             * const listener = (...args: ProcessEventMap['uncaughtException']) => { ... };
+             * ```
+             */
+            type UncaughtExceptionListener = (...args: ProcessEventMap["uncaughtException"]) => void;
+            /**
+             * @deprecated Global listener types will be removed in a future version.
+             * Callbacks passed directly to `process`'s EventEmitter methods
+             * have their parameter types inferred automatically.
+             *
+             * `process` event types are also available via `ProcessEventMap`:
+             *
+             * ```ts
+             * import type { ProcessEventMap } from 'node:process';
+             * const listener = (...args: ProcessEventMap['unhandledRejection']) => { ... };
+             * ```
+             */
+            type UnhandledRejectionListener = (...args: ProcessEventMap["unhandledRejection"]) => void;
+            /**
+             * @deprecated Global listener types will be removed in a future version.
+             * Callbacks passed directly to `process`'s EventEmitter methods
+             * have their parameter types inferred automatically.
+             *
+             * `process` event types are also available via `ProcessEventMap`:
+             *
+             * ```ts
+             * import type { ProcessEventMap } from 'node:process';
+             * const listener = (...args: ProcessEventMap['warning']) => { ... };
+             * ```
+             */
+            type WarningListener = (...args: ProcessEventMap["warning"]) => void;
+            /**
+             * @deprecated Global listener types will be removed in a future version.
+             * Callbacks passed directly to `process`'s EventEmitter methods
+             * have their parameter types inferred automatically.
+             *
+             * `process` event types are also available via `ProcessEventMap`:
+             *
+             * ```ts
+             * import type { ProcessEventMap } from 'node:process';
+             * const listener = (...args: ProcessEventMap['worker']) => { ... };
+             * ```
+             */
+            type WorkerListener = (...args: ProcessEventMap["worker"]) => void;
+            interface Socket extends ReadWriteStream {
+                isTTY?: true | undefined;
+            }
+            // Alias for compatibility
+            interface ProcessEnv extends Dict<string> {}
+            interface HRTime {
+                /**
+                 * This is the legacy version of {@link process.hrtime.bigint()}
+                 * before bigint was introduced in JavaScript.
+                 *
+                 * The `process.hrtime()` method returns the current high-resolution real time in a `[seconds, nanoseconds]` tuple `Array`,
+                 * where `nanoseconds` is the remaining part of the real time that can't be represented in second precision.
+                 *
+                 * `time` is an optional parameter that must be the result of a previous `process.hrtime()` call to diff with the current time.
+                 * If the parameter passed in is not a tuple `Array`, a TypeError will be thrown.
+                 * Passing in a user-defined array instead of the result of a previous call to `process.hrtime()` will lead to undefined behavior.
+                 *
+                 * These times are relative to an arbitrary time in the past,
+                 * and not related to the time of day and therefore not subject to clock drift.
+                 * The primary use is for measuring performance between intervals:
+                 * ```js
+                 * const { hrtime } = require('node:process');
+                 * const NS_PER_SEC = 1e9;
+                 * const time = hrtime();
+                 * // [ 1800216, 25 ]
+                 *
+                 * setTimeout(() => {
+                 *   const diff = hrtime(time);
+                 *   // [ 1, 552 ]
+                 *
+                 *   console.log(`Benchmark took ${diff[0] * NS_PER_SEC + diff[1]} nanoseconds`);
+                 *   // Benchmark took 1000000552 nanoseconds
+                 * }, 1000);
+                 * ```
+                 * @since 0.7.6
+                 * @legacy Use {@link process.hrtime.bigint()} instead.
+                 * @param time The result of a previous call to `process.hrtime()`
+                 */
+                (time?: [number, number]): [number, number];
+                /**
+                 * The `bigint` version of the {@link process.hrtime()} method returning the current high-resolution real time in nanoseconds as a `bigint`.
+                 *
+                 * Unlike {@link process.hrtime()}, it does not support an additional time argument since the difference can just be computed directly by subtraction of the two `bigint`s.
+                 * ```js
+                 * import { hrtime } from 'node:process';
+                 *
+                 * const start = hrtime.bigint();
+                 * // 191051479007711n
+                 *
+                 * setTimeout(() => {
+                 *   const end = hrtime.bigint();
+                 *   // 191052633396993n
+                 *
+                 *   console.log(`Benchmark took ${end - start} nanoseconds`);
+                 *   // Benchmark took 1154389282 nanoseconds
+                 * }, 1000);
+                 * ```
+                 * @since v10.7.0
+                 */
+                bigint(): bigint;
+            }
+            interface ProcessPermission {
+                /**
+                 * Verifies that the process is able to access the given scope and reference.
+                 * If no reference is provided, a global scope is assumed, for instance, `process.permission.has('fs.read')`
+                 * will check if the process has ALL file system read permissions.
+                 *
+                 * The reference has a meaning based on the provided scope. For example, the reference when the scope is File System means files and folders.
+                 *
+                 * The available scopes are:
+                 *
+                 * * `fs` - All File System
+                 * * `fs.read` - File System read operations
+                 * * `fs.write` - File System write operations
+                 * * `child` - Child process spawning operations
+                 * * `worker` - Worker thread spawning operation
+                 *
+                 * ```js
+                 * // Check if the process has permission to read the README file
+                 * process.permission.has('fs.read', './README.md');
+                 * // Check if the process has read permission operations
+                 * process.permission.has('fs.read');
+                 * ```
+                 * @since v20.0.0
+                 */
+                has(scope: string, reference?: string): boolean;
+            }
+            interface ProcessReport {
+                /**
+                 * Write reports in a compact format, single-line JSON, more easily consumable by log processing systems
+                 * than the default multi-line format designed for human consumption.
+                 * @since v13.12.0, v12.17.0
+                 */
+                compact: boolean;
+                /**
+                 * Directory where the report is written.
+                 * The default value is the empty string, indicating that reports are written to the current
+                 * working directory of the Node.js process.
+                 */
+                directory: string;
+                /**
+                 * Filename where the report is written. If set to the empty string, the output filename will be comprised
+                 * of a timestamp, PID, and sequence number. The default value is the empty string.
+                 */
+                filename: string;
+                /**
+                 * Returns a JavaScript Object representation of a diagnostic report for the running process.
+                 * The report's JavaScript stack trace is taken from `err`, if present.
+                 */
+                getReport(err?: Error): object;
+                /**
+                 * If true, a diagnostic report is generated on fatal errors,
+                 * such as out of memory errors or failed C++ assertions.
+                 * @default false
+                 */
+                reportOnFatalError: boolean;
+                /**
+                 * If true, a diagnostic report is generated when the process
+                 * receives the signal specified by process.report.signal.
+                 * @default false
+                 */
+                reportOnSignal: boolean;
+                /**
+                 * If true, a diagnostic report is generated on uncaught exception.
+                 * @default false
+                 */
+                reportOnUncaughtException: boolean;
+                /**
+                 * If true, a diagnostic report is generated without the environment variables.
+                 * @default false
+                 */
+                excludeEnv: boolean;
+                /**
+                 * The signal used to trigger the creation of a diagnostic report.
+                 * @default 'SIGUSR2'
+                 */
+                signal: Signals;
+                /**
+                 * Writes a diagnostic report to a file. If filename is not provided, the default filename
+                 * includes the date, time, PID, and a sequence number.
+                 * The report's JavaScript stack trace is taken from `err`, if present.
+                 *
+                 * If the value of filename is set to `'stdout'` or `'stderr'`, the report is written
+                 * to the stdout or stderr of the process respectively.
+                 * @param fileName Name of the file where the report is written.
+                 * This should be a relative path, that will be appended to the directory specified in
+                 * `process.report.directory`, or the current working directory of the Node.js process,
+                 * if unspecified.
+                 * @param err A custom error used for reporting the JavaScript stack.
+                 * @return Filename of the generated report.
+                 */
+                writeReport(fileName?: string, err?: Error): string;
+                writeReport(err?: Error): string;
+            }
+            interface ResourceUsage {
+                fsRead: number;
+                fsWrite: number;
+                involuntaryContextSwitches: number;
+                ipcReceived: number;
+                ipcSent: number;
+                majorPageFault: number;
+                maxRSS: number;
+                minorPageFault: number;
+                sharedMemorySize: number;
+                signalsCount: number;
+                swappedOut: number;
+                systemCPUTime: number;
+                unsharedDataSize: number;
+                unsharedStackSize: number;
+                userCPUTime: number;
+                voluntaryContextSwitches: number;
+            }
+            interface EmitWarningOptions {
+                /**
+                 * When `warning` is a `string`, `type` is the name to use for the _type_ of warning being emitted.
+                 *
+                 * @default 'Warning'
+                 */
+                type?: string | undefined;
+                /**
+                 * A unique identifier for the warning instance being emitted.
+                 */
+                code?: string | undefined;
+                /**
+                 * When `warning` is a `string`, `ctor` is an optional function used to limit the generated stack trace.
+                 *
+                 * @default process.emitWarning
+                 */
+                ctor?: Function | undefined;
+                /**
+                 * Additional text to include with the error.
+                 */
+                detail?: string | undefined;
+            }
+            interface ProcessConfig {
+                readonly target_defaults: {
+                    readonly cflags: any[];
+                    readonly default_configuration: string;
+                    readonly defines: string[];
+                    readonly include_dirs: string[];
+                    readonly libraries: string[];
+                };
+                readonly variables: {
+                    readonly clang: number;
+                    readonly host_arch: string;
+                    readonly node_install_npm: boolean;
+                    readonly node_install_waf: boolean;
+                    readonly node_prefix: string;
+                    readonly node_shared_openssl: boolean;
+                    readonly node_shared_v8: boolean;
+                    readonly node_shared_zlib: boolean;
+                    readonly node_use_dtrace: boolean;
+                    readonly node_use_etw: boolean;
+                    readonly node_use_openssl: boolean;
+                    readonly target_arch: string;
+                    readonly v8_no_strict_aliasing: number;
+                    readonly v8_use_snapshot: boolean;
+                    readonly visibility: string;
+                };
+            }
+            interface Process extends EventEmitter {
+                /**
+                 * The `process.stdout` property returns a stream connected to`stdout` (fd `1`). It is a `net.Socket` (which is a `Duplex` stream) unless fd `1` refers to a file, in which case it is
+                 * a `Writable` stream.
+                 *
+                 * For example, to copy `process.stdin` to `process.stdout`:
+                 *
+                 * ```js
+                 * import { stdin, stdout } from 'node:process';
+                 *
+                 * stdin.pipe(stdout);
+                 * ```
+                 *
+                 * `process.stdout` differs from other Node.js streams in important ways. See `note on process I/O` for more information.
+                 */
+                stdout: WriteStream & {
+                    fd: 1;
+                };
+                /**
+                 * The `process.stderr` property returns a stream connected to`stderr` (fd `2`). It is a `net.Socket` (which is a `Duplex` stream) unless fd `2` refers to a file, in which case it is
+                 * a `Writable` stream.
+                 *
+                 * `process.stderr` differs from other Node.js streams in important ways. See `note on process I/O` for more information.
+                 */
+                stderr: WriteStream & {
+                    fd: 2;
+                };
+                /**
+                 * The `process.stdin` property returns a stream connected to`stdin` (fd `0`). It is a `net.Socket` (which is a `Duplex` stream) unless fd `0` refers to a file, in which case it is
+                 * a `Readable` stream.
+                 *
+                 * For details of how to read from `stdin` see `readable.read()`.
+                 *
+                 * As a `Duplex` stream, `process.stdin` can also be used in "old" mode that
+                 * is compatible with scripts written for Node.js prior to v0.10\.
+                 * For more information see `Stream compatibility`.
+                 *
+                 * In "old" streams mode the `stdin` stream is paused by default, so one
+                 * must call `process.stdin.resume()` to read from it. Note also that calling `process.stdin.resume()` itself would switch stream to "old" mode.
+                 */
+                stdin: ReadStream & {
+                    fd: 0;
+                };
+                /**
+                 * The `process.argv` property returns an array containing the command-line
+                 * arguments passed when the Node.js process was launched. The first element will
+                 * be {@link execPath}. See `process.argv0` if access to the original value
+                 * of `argv[0]` is needed. The second element will be the path to the JavaScript
+                 * file being executed. If a [program entry point](https://nodejs.org/docs/latest-v25.x/api/cli.html#program-entry-point) was provided, the second element
+                 * will be the absolute path to it. The remaining elements are additional command-line
+                 * arguments.
+                 *
+                 * For example, assuming the following script for `process-args.js`:
+                 *
+                 * ```js
+                 * import { argv } from 'node:process';
+                 *
+                 * // print process.argv
+                 * argv.forEach((val, index) => {
+                 *   console.log(`${index}: ${val}`);
+                 * });
+                 * ```
+                 *
+                 * Launching the Node.js process as:
+                 *
+                 * ```bash
+                 * node process-args.js one two=three four
+                 * ```
+                 *
+                 * Would generate the output:
+                 *
+                 * ```text
+                 * 0: /usr/local/bin/node
+                 * 1: /Users/mjr/work/node/process-args.js
+                 * 2: one
+                 * 3: two=three
+                 * 4: four
+                 * ```
+                 * @since v0.1.27
+                 */
+                argv: string[];
+                /**
+                 * The `process.argv0` property stores a read-only copy of the original value of`argv[0]` passed when Node.js starts.
+                 *
+                 * ```console
+                 * $ bash -c 'exec -a customArgv0 ./node'
+                 * > process.argv[0]
+                 * '/Volumes/code/external/node/out/Release/node'
+                 * > process.argv0
+                 * 'customArgv0'
+                 * ```
+                 * @since v6.4.0
+                 */
+                argv0: string;
+                /**
+                 * The `process.execArgv` property returns the set of Node.js-specific command-line
+                 * options passed when the Node.js process was launched. These options do not
+                 * appear in the array returned by the {@link argv} property, and do not
+                 * include the Node.js executable, the name of the script, or any options following
+                 * the script name. These options are useful in order to spawn child processes with
+                 * the same execution environment as the parent.
+                 *
+                 * ```bash
+                 * node --icu-data-dir=./foo --require ./bar.js script.js --version
+                 * ```
+                 *
+                 * Results in `process.execArgv`:
+                 *
+                 * ```js
+                 * ["--icu-data-dir=./foo", "--require", "./bar.js"]
+                 * ```
+                 *
+                 * And `process.argv`:
+                 *
+                 * ```js
+                 * ['/usr/local/bin/node', 'script.js', '--version']
+                 * ```
+                 *
+                 * Refer to `Worker constructor` for the detailed behavior of worker
+                 * threads with this property.
+                 * @since v0.7.7
+                 */
+                execArgv: string[];
+                /**
+                 * The `process.execPath` property returns the absolute pathname of the executable
+                 * that started the Node.js process. Symbolic links, if any, are resolved.
+                 *
+                 * ```js
+                 * '/usr/local/bin/node'
+                 * ```
+                 * @since v0.1.100
+                 */
+                execPath: string;
+                /**
+                 * The `process.abort()` method causes the Node.js process to exit immediately and
+                 * generate a core file.
+                 *
+                 * This feature is not available in `Worker` threads.
+                 * @since v0.7.0
+                 */
+                abort(): never;
+                /**
+                 * The `process.chdir()` method changes the current working directory of the
+                 * Node.js process or throws an exception if doing so fails (for instance, if
+                 * the specified `directory` does not exist).
+                 *
+                 * ```js
+                 * import { chdir, cwd } from 'node:process';
+                 *
+                 * console.log(`Starting directory: ${cwd()}`);
+                 * try {
+                 *   chdir('/tmp');
+                 *   console.log(`New directory: ${cwd()}`);
+                 * } catch (err) {
+                 *   console.error(`chdir: ${err}`);
+                 * }
+                 * ```
+                 *
+                 * This feature is not available in `Worker` threads.
+                 * @since v0.1.17
+                 */
+                chdir(directory: string): void;
+                /**
+                 * The `process.cwd()` method returns the current working directory of the Node.js
+                 * process.
+                 *
+                 * ```js
+                 * import { cwd } from 'node:process';
+                 *
+                 * console.log(`Current directory: ${cwd()}`);
+                 * ```
+                 * @since v0.1.8
+                 */
+                cwd(): string;
+                /**
+                 * The port used by the Node.js debugger when enabled.
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * process.debugPort = 5858;
+                 * ```
+                 * @since v0.7.2
+                 */
+                debugPort: number;
+                /**
+                 * The `process.dlopen()` method allows dynamically loading shared objects. It is primarily used by `require()` to load C++ Addons, and
+                 * should not be used directly, except in special cases. In other words, `require()` should be preferred over `process.dlopen()`
+                 * unless there are specific reasons such as custom dlopen flags or loading from ES modules.
+                 *
+                 * The `flags` argument is an integer that allows to specify dlopen behavior. See the `[os.constants.dlopen](https://nodejs.org/docs/latest-v25.x/api/os.html#dlopen-constants)`
+                 * documentation for details.
+                 *
+                 * An important requirement when calling `process.dlopen()` is that the `module` instance must be passed. Functions exported by the C++ Addon
+                 * are then accessible via `module.exports`.
+                 *
+                 * The example below shows how to load a C++ Addon, named `local.node`, that exports a `foo` function. All the symbols are loaded before the call returns, by passing the `RTLD_NOW` constant.
+                 * In this example the constant is assumed to be available.
+                 *
+                 * ```js
+                 * import { dlopen } from 'node:process';
+                 * import { constants } from 'node:os';
+                 * import { fileURLToPath } from 'node:url';
+                 *
+                 * const module = { exports: {} };
+                 * dlopen(module, fileURLToPath(new URL('local.node', import.meta.url)),
+                 *        constants.dlopen.RTLD_NOW);
+                 * module.exports.foo();
+                 * ```
+                 */
+                dlopen(module: object, filename: string, flags?: number): void;
+                /**
+                 * The `process.emitWarning()` method can be used to emit custom or application
+                 * specific process warnings. These can be listened for by adding a handler to the `'warning'` event.
+                 *
+                 * ```js
+                 * import { emitWarning } from 'node:process';
+                 *
+                 * // Emit a warning using a string.
+                 * emitWarning('Something happened!');
+                 * // Emits: (node: 56338) Warning: Something happened!
+                 * ```
+                 *
+                 * ```js
+                 * import { emitWarning } from 'node:process';
+                 *
+                 * // Emit a warning using a string and a type.
+                 * emitWarning('Something Happened!', 'CustomWarning');
+                 * // Emits: (node:56338) CustomWarning: Something Happened!
+                 * ```
+                 *
+                 * ```js
+                 * import { emitWarning } from 'node:process';
+                 *
+                 * emitWarning('Something happened!', 'CustomWarning', 'WARN001');
+                 * // Emits: (node:56338) [WARN001] CustomWarning: Something happened!
+                 * ```js
+                 *
+                 * In each of the previous examples, an `Error` object is generated internally by `process.emitWarning()` and passed through to the `'warning'` handler.
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * process.on('warning', (warning) => {
+                 *   console.warn(warning.name);    // 'Warning'
+                 *   console.warn(warning.message); // 'Something happened!'
+                 *   console.warn(warning.code);    // 'MY_WARNING'
+                 *   console.warn(warning.stack);   // Stack trace
+                 *   console.warn(warning.detail);  // 'This is some additional information'
+                 * });
+                 * ```
+                 *
+                 * If `warning` is passed as an `Error` object, it will be passed through to the `'warning'` event handler
+                 * unmodified (and the optional `type`, `code` and `ctor` arguments will be ignored):
+                 *
+                 * ```js
+                 * import { emitWarning } from 'node:process';
+                 *
+                 * // Emit a warning using an Error object.
+                 * const myWarning = new Error('Something happened!');
+                 * // Use the Error name property to specify the type name
+                 * myWarning.name = 'CustomWarning';
+                 * myWarning.code = 'WARN001';
+                 *
+                 * emitWarning(myWarning);
+                 * // Emits: (node:56338) [WARN001] CustomWarning: Something happened!
+                 * ```
+                 *
+                 * A `TypeError` is thrown if `warning` is anything other than a string or `Error` object.
+                 *
+                 * While process warnings use `Error` objects, the process warning mechanism is not a replacement for normal error handling mechanisms.
+                 *
+                 * The following additional handling is implemented if the warning `type` is `'DeprecationWarning'`:
+                 * * If the `--throw-deprecation` command-line flag is used, the deprecation warning is thrown as an exception rather than being emitted as an event.
+                 * * If the `--no-deprecation` command-line flag is used, the deprecation warning is suppressed.
+                 * * If the `--trace-deprecation` command-line flag is used, the deprecation warning is printed to `stderr` along with the full stack trace.
+                 * @since v8.0.0
+                 * @param warning The warning to emit.
+                 */
+                emitWarning(warning: string | Error, ctor?: Function): void;
+                emitWarning(warning: string | Error, type?: string, ctor?: Function): void;
+                emitWarning(warning: string | Error, type?: string, code?: string, ctor?: Function): void;
+                emitWarning(warning: string | Error, options?: EmitWarningOptions): void;
+                /**
+                 * The `process.env` property returns an object containing the user environment.
+                 * See [`environ(7)`](http://man7.org/linux/man-pages/man7/environ.7.html).
+                 *
+                 * An example of this object looks like:
+                 *
+                 * ```js
+                 * {
+                 *   TERM: 'xterm-256color',
+                 *   SHELL: '/usr/local/bin/bash',
+                 *   USER: 'maciej',
+                 *   PATH: '~/.bin/:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin',
+                 *   PWD: '/Users/maciej',
+                 *   EDITOR: 'vim',
+                 *   SHLVL: '1',
+                 *   HOME: '/Users/maciej',
+                 *   LOGNAME: 'maciej',
+                 *   _: '/usr/local/bin/node'
+                 * }
+                 * ```
+                 *
+                 * It is possible to modify this object, but such modifications will not be
+                 * reflected outside the Node.js process, or (unless explicitly requested)
+                 * to other `Worker` threads.
+                 * In other words, the following example would not work:
+                 *
+                 * ```bash
+                 * node -e 'process.env.foo = "bar"' &#x26;&#x26; echo $foo
+                 * ```
+                 *
+                 * While the following will:
+                 *
+                 * ```js
+                 * import { env } from 'node:process';
+                 *
+                 * env.foo = 'bar';
+                 * console.log(env.foo);
+                 * ```
+                 *
+                 * Assigning a property on `process.env` will implicitly convert the value
+                 * to a string. **This behavior is deprecated.** Future versions of Node.js may
+                 * throw an error when the value is not a string, number, or boolean.
+                 *
+                 * ```js
+                 * import { env } from 'node:process';
+                 *
+                 * env.test = null;
+                 * console.log(env.test);
+                 * // => 'null'
+                 * env.test = undefined;
+                 * console.log(env.test);
+                 * // => 'undefined'
+                 * ```
+                 *
+                 * Use `delete` to delete a property from `process.env`.
+                 *
+                 * ```js
+                 * import { env } from 'node:process';
+                 *
+                 * env.TEST = 1;
+                 * delete env.TEST;
+                 * console.log(env.TEST);
+                 * // => undefined
+                 * ```
+                 *
+                 * On Windows operating systems, environment variables are case-insensitive.
+                 *
+                 * ```js
+                 * import { env } from 'node:process';
+                 *
+                 * env.TEST = 1;
+                 * console.log(env.test);
+                 * // => 1
+                 * ```
+                 *
+                 * Unless explicitly specified when creating a `Worker` instance,
+                 * each `Worker` thread has its own copy of `process.env`, based on its
+                 * parent thread's `process.env`, or whatever was specified as the `env` option
+                 * to the `Worker` constructor. Changes to `process.env` will not be visible
+                 * across `Worker` threads, and only the main thread can make changes that
+                 * are visible to the operating system or to native add-ons. On Windows, a copy of `process.env` on a `Worker` instance operates in a case-sensitive manner
+                 * unlike the main thread.
+                 * @since v0.1.27
+                 */
+                env: ProcessEnv;
+                /**
+                 * The `process.exit()` method instructs Node.js to terminate the process
+                 * synchronously with an exit status of `code`. If `code` is omitted, exit uses
+                 * either the 'success' code `0` or the value of `process.exitCode` if it has been
+                 * set. Node.js will not terminate until all the `'exit'` event listeners are
+                 * called.
+                 *
+                 * To exit with a 'failure' code:
+                 *
+                 * ```js
+                 * import { exit } from 'node:process';
+                 *
+                 * exit(1);
+                 * ```
+                 *
+                 * The shell that executed Node.js should see the exit code as `1`.
+                 *
+                 * Calling `process.exit()` will force the process to exit as quickly as possible
+                 * even if there are still asynchronous operations pending that have not yet
+                 * completed fully, including I/O operations to `process.stdout` and `process.stderr`.
+                 *
+                 * In most situations, it is not actually necessary to call `process.exit()` explicitly. The Node.js process will exit on its own _if there is no additional_
+                 * _work pending_ in the event loop. The `process.exitCode` property can be set to
+                 * tell the process which exit code to use when the process exits gracefully.
+                 *
+                 * For instance, the following example illustrates a _misuse_ of the `process.exit()` method that could lead to data printed to stdout being
+                 * truncated and lost:
+                 *
+                 * ```js
+                 * import { exit } from 'node:process';
+                 *
+                 * // This is an example of what *not* to do:
+                 * if (someConditionNotMet()) {
+                 *   printUsageToStdout();
+                 *   exit(1);
+                 * }
+                 * ```
+                 *
+                 * The reason this is problematic is because writes to `process.stdout` in Node.js
+                 * are sometimes _asynchronous_ and may occur over multiple ticks of the Node.js
+                 * event loop. Calling `process.exit()`, however, forces the process to exit _before_ those additional writes to `stdout` can be performed.
+                 *
+                 * Rather than calling `process.exit()` directly, the code _should_ set the `process.exitCode` and allow the process to exit naturally by avoiding
+                 * scheduling any additional work for the event loop:
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * // How to properly set the exit code while letting
+                 * // the process exit gracefully.
+                 * if (someConditionNotMet()) {
+                 *   printUsageToStdout();
+                 *   process.exitCode = 1;
+                 * }
+                 * ```
+                 *
+                 * If it is necessary to terminate the Node.js process due to an error condition,
+                 * throwing an _uncaught_ error and allowing the process to terminate accordingly
+                 * is safer than calling `process.exit()`.
+                 *
+                 * In `Worker` threads, this function stops the current thread rather
+                 * than the current process.
+                 * @since v0.1.13
+                 * @param [code=0] The exit code. For string type, only integer strings (e.g.,'1') are allowed.
+                 */
+                exit(code?: number | string | null): never;
+                /**
+                 * A number which will be the process exit code, when the process either
+                 * exits gracefully, or is exited via {@link exit} without specifying
+                 * a code.
+                 *
+                 * Specifying a code to {@link exit} will override any
+                 * previous setting of `process.exitCode`.
+                 * @default undefined
+                 * @since v0.11.8
+                 */
+                exitCode: number | string | null | undefined;
+                finalization: {
+                    /**
+                     * This function registers a callback to be called when the process emits the `exit` event if the `ref` object was not garbage collected.
+                     * If the object `ref` was garbage collected before the `exit` event is emitted, the callback will be removed from the finalization registry, and it will not be called on process exit.
+                     *
+                     * Inside the callback you can release the resources allocated by the `ref` object.
+                     * Be aware that all limitations applied to the `beforeExit` event are also applied to the callback function,
+                     * this means that there is a possibility that the callback will not be called under special circumstances.
+                     *
+                     * The idea of ​​this function is to help you free up resources when the starts process exiting, but also let the object be garbage collected if it is no longer being used.
+                     * @param ref The reference to the resource that is being tracked.
+                     * @param callback The callback function to be called when the resource is finalized.
+                     * @since v22.5.0
+                     * @experimental
+                     */
+                    register<T extends object>(ref: T, callback: (ref: T, event: "exit") => void): void;
+                    /**
+                     * This function behaves exactly like the `register`, except that the callback will be called when the process emits the `beforeExit` event if `ref` object was not garbage collected.
+                     *
+                     * Be aware that all limitations applied to the `beforeExit` event are also applied to the callback function, this means that there is a possibility that the callback will not be called under special circumstances.
+                     * @param ref The reference to the resource that is being tracked.
+                     * @param callback The callback function to be called when the resource is finalized.
+                     * @since v22.5.0
+                     * @experimental
+                     */
+                    registerBeforeExit<T extends object>(ref: T, callback: (ref: T, event: "beforeExit") => void): void;
+                    /**
+                     * This function remove the register of the object from the finalization registry, so the callback will not be called anymore.
+                     * @param ref The reference to the resource that was registered previously.
+                     * @since v22.5.0
+                     * @experimental
+                     */
+                    unregister(ref: object): void;
+                };
+                /**
+                 * The `process.getActiveResourcesInfo()` method returns an array of strings containing
+                 * the types of the active resources that are currently keeping the event loop alive.
+                 *
+                 * ```js
+                 * import { getActiveResourcesInfo } from 'node:process';
+                 * import { setTimeout } from 'node:timers';
+
+                 * console.log('Before:', getActiveResourcesInfo());
+                 * setTimeout(() => {}, 1000);
+                 * console.log('After:', getActiveResourcesInfo());
+                 * // Prints:
+                 * //   Before: [ 'TTYWrap', 'TTYWrap', 'TTYWrap' ]
+                 * //   After: [ 'TTYWrap', 'TTYWrap', 'TTYWrap', 'Timeout' ]
+                 * ```
+                 * @since v17.3.0, v16.14.0
+                 */
+                getActiveResourcesInfo(): string[];
+                /**
+                 * Provides a way to load built-in modules in a globally available function.
+                 * @param id ID of the built-in module being requested.
+                 */
+                getBuiltinModule<ID extends keyof BuiltInModule>(id: ID): BuiltInModule[ID];
+                getBuiltinModule(id: string): object | undefined;
+                /**
+                 * The `process.getgid()` method returns the numerical group identity of the
+                 * process. (See [`getgid(2)`](http://man7.org/linux/man-pages/man2/getgid.2.html).)
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * if (process.getgid) {
+                 *   console.log(`Current gid: ${process.getgid()}`);
+                 * }
+                 * ```
+                 *
+                 * This function is only available on POSIX platforms (i.e. not Windows or
+                 * Android).
+                 * @since v0.1.31
+                 */
+                getgid?: () => number;
+                /**
+                 * The `process.setgid()` method sets the group identity of the process. (See [`setgid(2)`](http://man7.org/linux/man-pages/man2/setgid.2.html).) The `id` can be passed as either a
+                 * numeric ID or a group name
+                 * string. If a group name is specified, this method blocks while resolving the
+                 * associated numeric ID.
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * if (process.getgid &#x26;&#x26; process.setgid) {
+                 *   console.log(`Current gid: ${process.getgid()}`);
+                 *   try {
+                 *     process.setgid(501);
+                 *     console.log(`New gid: ${process.getgid()}`);
+                 *   } catch (err) {
+                 *     console.log(`Failed to set gid: ${err}`);
+                 *   }
+                 * }
+                 * ```
+                 *
+                 * This function is only available on POSIX platforms (i.e. not Windows or
+                 * Android).
+                 * This feature is not available in `Worker` threads.
+                 * @since v0.1.31
+                 * @param id The group name or ID
+                 */
+                setgid?: (id: number | string) => void;
+                /**
+                 * The `process.getuid()` method returns the numeric user identity of the process.
+                 * (See [`getuid(2)`](http://man7.org/linux/man-pages/man2/getuid.2.html).)
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * if (process.getuid) {
+                 *   console.log(`Current uid: ${process.getuid()}`);
+                 * }
+                 * ```
+                 *
+                 * This function is only available on POSIX platforms (i.e. not Windows or
+                 * Android).
+                 * @since v0.1.28
+                 */
+                getuid?: () => number;
+                /**
+                 * The `process.setuid(id)` method sets the user identity of the process. (See [`setuid(2)`](http://man7.org/linux/man-pages/man2/setuid.2.html).) The `id` can be passed as either a
+                 * numeric ID or a username string.
+                 * If a username is specified, the method blocks while resolving the associated
+                 * numeric ID.
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * if (process.getuid &#x26;&#x26; process.setuid) {
+                 *   console.log(`Current uid: ${process.getuid()}`);
+                 *   try {
+                 *     process.setuid(501);
+                 *     console.log(`New uid: ${process.getuid()}`);
+                 *   } catch (err) {
+                 *     console.log(`Failed to set uid: ${err}`);
+                 *   }
+                 * }
+                 * ```
+                 *
+                 * This function is only available on POSIX platforms (i.e. not Windows or
+                 * Android).
+                 * This feature is not available in `Worker` threads.
+                 * @since v0.1.28
+                 */
+                setuid?: (id: number | string) => void;
+                /**
+                 * The `process.geteuid()` method returns the numerical effective user identity of
+                 * the process. (See [`geteuid(2)`](http://man7.org/linux/man-pages/man2/geteuid.2.html).)
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * if (process.geteuid) {
+                 *   console.log(`Current uid: ${process.geteuid()}`);
+                 * }
+                 * ```
+                 *
+                 * This function is only available on POSIX platforms (i.e. not Windows or
+                 * Android).
+                 * @since v2.0.0
+                 */
+                geteuid?: () => number;
+                /**
+                 * The `process.seteuid()` method sets the effective user identity of the process.
+                 * (See [`seteuid(2)`](http://man7.org/linux/man-pages/man2/seteuid.2.html).) The `id` can be passed as either a numeric ID or a username
+                 * string. If a username is specified, the method blocks while resolving the
+                 * associated numeric ID.
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * if (process.geteuid &#x26;&#x26; process.seteuid) {
+                 *   console.log(`Current uid: ${process.geteuid()}`);
+                 *   try {
+                 *     process.seteuid(501);
+                 *     console.log(`New uid: ${process.geteuid()}`);
+                 *   } catch (err) {
+                 *     console.log(`Failed to set uid: ${err}`);
+                 *   }
+                 * }
+                 * ```
+                 *
+                 * This function is only available on POSIX platforms (i.e. not Windows or
+                 * Android).
+                 * This feature is not available in `Worker` threads.
+                 * @since v2.0.0
+                 * @param id A user name or ID
+                 */
+                seteuid?: (id: number | string) => void;
+                /**
+                 * The `process.getegid()` method returns the numerical effective group identity
+                 * of the Node.js process. (See [`getegid(2)`](http://man7.org/linux/man-pages/man2/getegid.2.html).)
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * if (process.getegid) {
+                 *   console.log(`Current gid: ${process.getegid()}`);
+                 * }
+                 * ```
+                 *
+                 * This function is only available on POSIX platforms (i.e. not Windows or
+                 * Android).
+                 * @since v2.0.0
+                 */
+                getegid?: () => number;
+                /**
+                 * The `process.setegid()` method sets the effective group identity of the process.
+                 * (See [`setegid(2)`](http://man7.org/linux/man-pages/man2/setegid.2.html).) The `id` can be passed as either a numeric ID or a group
+                 * name string. If a group name is specified, this method blocks while resolving
+                 * the associated a numeric ID.
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * if (process.getegid &#x26;&#x26; process.setegid) {
+                 *   console.log(`Current gid: ${process.getegid()}`);
+                 *   try {
+                 *     process.setegid(501);
+                 *     console.log(`New gid: ${process.getegid()}`);
+                 *   } catch (err) {
+                 *     console.log(`Failed to set gid: ${err}`);
+                 *   }
+                 * }
+                 * ```
+                 *
+                 * This function is only available on POSIX platforms (i.e. not Windows or
+                 * Android).
+                 * This feature is not available in `Worker` threads.
+                 * @since v2.0.0
+                 * @param id A group name or ID
+                 */
+                setegid?: (id: number | string) => void;
+                /**
+                 * The `process.getgroups()` method returns an array with the supplementary group
+                 * IDs. POSIX leaves it unspecified if the effective group ID is included but
+                 * Node.js ensures it always is.
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * if (process.getgroups) {
+                 *   console.log(process.getgroups()); // [ 16, 21, 297 ]
+                 * }
+                 * ```
+                 *
+                 * This function is only available on POSIX platforms (i.e. not Windows or
+                 * Android).
+                 * @since v0.9.4
+                 */
+                getgroups?: () => number[];
+                /**
+                 * The `process.setgroups()` method sets the supplementary group IDs for the
+                 * Node.js process. This is a privileged operation that requires the Node.js
+                 * process to have `root` or the `CAP_SETGID` capability.
+                 *
+                 * The `groups` array can contain numeric group IDs, group names, or both.
+                 *
+                 * ```js
+                 * import process from 'node:process';
+                 *
+                 * if (process.getgroups &#x26;&#x26; process.setgroups) {
+                 *   try {
+                 *     process.setgroups([501]);
+                 *     console.log(process.getgroups()); // new groups
+                 *   } catch (err) {
+                 *     console.log(`Failed to set groups: ${err}`);
+                 *   }
+                 * }
+                 * ```
+                 *
+                 * This function is only available on POSIX platforms (i.e. not Windows or
+                 * Android).
+                 * This feature is not available in `Worker` threads.
+                 * @since v0.9.4
+                 */
+                setgroups?: (groups: ReadonlyArray<string | number>) => void;
+                /**
+                 * The `process.setUncaughtExceptionCaptureCallback()` function sets a function
+                 * that will be invoked when an uncaught exception occurs, which will receive the
+                 * exception value itself as its first argument.
+                 *
+                 * If such a function is set, the `'uncaughtException'` event will
+                 * not be emitted. If `--abort-on-uncaught-exception` was passed from the
+                 * command line or set through `v8.setFlagsFromString()`, the process will
+                 * not abort. Actions configured to take place on exceptions such as report
+                 * generations will be affected too
+                 *
+                 * To unset the capture function, `process.setUncaughtExceptionCaptureCallback(null)` may be used. Calling this
+                 * method with a non-`null` argument while another capture function is set will
+                 * throw an error.
+                 *
+                 * Using this function is mutually exclusive with using the deprecated `domain` built-in module.
+                 * @since v9.3.0
+                 */
+                setUncaughtExceptionCaptureCallback(cb: ((err: Error) => void) | null): void;
+                /**
+                 * Indicates whether a callback has been set using {@link setUncaughtExceptionCaptureCallback}.
+                 * @since v9.3.0
+                 */
+                hasUncaughtExceptionCaptureCallback(): boolean;
+                /**
+                 * The `process.sourceMapsEnabled` property returns whether the [Source Map v3](https://sourcemaps.info/spec.html) support for stack traces is enabled.
+                 * @since v20.7.0
+                 * @experimental
+                 */
+                readonly sourceMapsEnabled: boolean;
+                /**
+                 * This function enables or disables the [Source Map v3](https://sourcemaps.info/spec.html) support for
+                 * stack traces.
+                 *
+                 * It provides same features as launching Node.js process with commandline options `--enable-source-maps`.
+                 *
+                 * Only source maps in JavaScript files that are loaded after source maps has been
+                 * enabled will be parsed and loaded.
+                 * @since v16.6.0, v14.18.0
+                 * @experimental
+                 */
+                setSourceMapsEnabled(value: boolean): void;
+                /**
+                 * The `process.version` property contains the Node.js version string.
+                 *
+                 * ```js
+                 * import { version } from 'node:process';
+                 *
+                 * console.log(`Version: ${version}`);
+                 * // Version: v14.8.0
+                 * ```
+                 *
+                 * To get the version string without the prepended _v_, use`process.versions.node`.
+                 * @since v0.1.3
+                 */
+                readonly version: string;
+                /**
+                 * The `process.versions` property returns an object listing the version strings of
+                 * Node.js and its dependencies. `process.versions.modules` indicates the current
+                 * ABI version, which is increased whenever a C++ API changes. Node.js will refuse
+                 * to load modules that were compiled against a different module ABI version.
+                 *
+                 * ```js
+                 * import { versions } from 'node:process';
+                 *
+                 * console.log(versions);
+                 * ```
+                 *
+                 * Will generate an object similar to:
+                 *
+                 * ```console
+                 * { node: '20.2.0',
+                 *   acorn: '8.8.2',
+                 *   ada: '2.4.0',
+                 *   ares: '1.19.0',
+                 *   base64: '0.5.0',
+                 *   brotli: '1.0.9',
+                 *   cjs_module_lexer: '1.2.2',
+                 *   cldr: '43.0',
+                 *   icu: '73.1',
+                 *   llhttp: '8.1.0',
+                 *   modules: '115',
+                 *   napi: '8',
+                 *   nghttp2: '1.52.0',
+                 *   nghttp3: '0.7.0',
+                 *   ngtcp2: '0.8.1',
+                 *   openssl: '3.0.8+quic',
+                 *   simdutf: '3.2.9',
+                 *   tz: '2023c',
+                 *   undici: '5.22.0',
+                 *   unicode: '15.0',
+                 *   uv: '1.44.2',
+                 *   uvwasi: '0.0.16',
+                 *   v8: '11.3.244.8-node.9',
+                 *   zlib: '1.2.13' }
+                 * ```
+                 * @since v0.2.0
+                 */
+                readonly versions: ProcessVersions;
+                /**
+                 * The `process.config` property returns a frozen `Object` containing the
+                 * JavaScript representation of the configure options used to compile the current
+                 * Node.js executable. This is the same as the `config.gypi` file that was produced
+                 * when running the `./configure` script.
+                 *
+                 * An example of the possible output looks like:
+                 *
+                 * ```js
+                 * {
+                 *   target_defaults:
+                 *    { cflags: [],
+                 *      default_configuration: 'Release',
+                 *      defines: [],
+                 *      include_dirs: [],
+                 *      libraries: [] },
+                 *   variables:
+                 *    {
+                 *      host_arch: 'x64',
+                 *      napi_build_version: 5,
+                 *      node_install_npm: 'true',
+                 *      node_prefix: '',
+                 *      node_shared_cares: 'false',
+                 *      node_shared_http_parser: 'false',
+                 *      node_shared_libuv: 'false',
+                 *      node_shared_zlib: 'false',
+                 *      node_use_openssl: 'true',
+                 *      node_shared_openssl: 'false',
+                 *      strict_aliasing: 'true',
+                 *      target_arch: 'x64',
+                 *      v8_use_snapshot: 1
+                 *    }
+                 * }
+                 * ```
+                 * @since v0.7.7
+                 */
+                readonly config: ProcessConfig;
+                /**
+                 * The `process.kill()` method sends the `signal` to the process identified by`pid`.
+                 *
+                 * Signal names are strings such as `'SIGINT'` or `'SIGHUP'`. See `Signal Events` and [`kill(2)`](http://man7.org/linux/man-pages/man2/kill.2.html) for more information.
+                 *
+                 * This method will throw an error if the target `pid` does not exist. As a special
+                 * case, a signal of `0` can be used to test for the existence of a process.
+                 * Windows platforms will throw an error if the `pid` is used to kill a process
+                 * group.
+                 *
+                 * Even though the name of this function is `process.kill()`, it is really just a
+                 * signal sender, like the `kill` system call. The signal sent may do something
+                 * other than kill the target process.
+                 *
+                 * ```js
+                 * import process, { kill } from 'node:process';
+                 *
+                 * process.on('SIGHUP', () => {
+                 *   console.log('Got SIGHUP signal.');
+                 * });
+                 *
+                 * setTimeout(() => {
+                 *   console.log('Exiting.');
+                 *   process.exit(0);
+                 * }, 100);
+                 *
+                 * kill(process.pid, 'SIGHUP');
+                 * ```
+                 *
+                 * When `SIGUSR1` is received by a Node.js process, Node.js will start the
+                 * debugger. See `Signal Events`.
+                 * @since v0.0.6
+                 * @param pid A process ID
+                 * @param [signal='SIGTERM'] The signal to send, either as a string or number.
+                 */
+                kill(pid: number, signal?: string | number): true;
+                /**
+                 * Loads the environment configuration from a `.env` file into `process.env`. If
+                 * the file is not found, error will be thrown.
+                 *
+                 * To load a specific .env file by specifying its path, use the following code:
+                 *
+                 * ```js
+                 * import { loadEnvFile } from 'node:process';
+                 *
+                 * loadEnvFile('./development.env')
+                 * ```
+                 * @since v20.12.0
+                 * @param path The path to the .env file
+                 */
+                loadEnvFile(path?: PathLike): void;
+                /**
+                 * The `process.pid` property returns the PID of the process.
+                 *
+                 * ```js
+                 * import { pid } from 'node:process';
+                 *
+                 * console.log(`This process is pid ${pid}`);
+                 * ```
+                 * @since v0.1.15
+                 */
+                readonly pid: number;
+                /**
+                 * The `process.ppid` property returns the PID of the parent of the
+                 * current process.
+                 *
+                 * ```js
+                 * import { ppid } from 'node:process';
+                 *
+                 * console.log(`The parent process is pid ${ppid}`);
+                 * ```
+                 * @since v9.2.0, v8.10.0, v6.13.0
+                 */
+                readonly ppid: number;
+                /**
+                 * The `process.threadCpuUsage()` method returns the user and system CPU time usage of
+                 * the current worker thread, in an object with properties `user` and `system`, whose
+                 * values are microsecond values (millionth of a second).
+                 *
+                 * The result of a previous call to `process.threadCpuUsage()` can be passed as the
+                 * argument to the function, to get a diff reading.
+                 * @since v23.9.0
+                 * @param previousValue A previous return value from calling
+                 * `process.threadCpuUsage()`
+                 */
+                threadCpuUsage(previousValue?: CpuUsage): CpuUsage;
+                /**
+                 * The `process.title` property returns the current process title (i.e. returns
+                 * the current value of `ps`). Assigning a new value to `process.title` modifies
+                 * the current value of `ps`.
+                 *
+                 * When a new value is assigned, different platforms will impose different maximum
+                 * length restrictions on the title. Usually such restrictions are quite limited.
+                 * For instance, on Linux and macOS, `process.title` is limited to the size of the
+                 * binary name plus the length of the command-line arguments because setting the `process.title` overwrites the `argv` memory of the process. Node.js v0.8
+                 * allowed for longer process title strings by also overwriting the `environ` memory but that was potentially insecure and confusing in some (rather obscure)
+                 * cases.
+                 *
+                 * Assigning a value to `process.title` might not result in an accurate label
+                 * within process manager applications such as macOS Activity Monitor or Windows
+                 * Services Manager.
+                 * @since v0.1.104
+                 */
+                title: string;
+                /**
+                 * The operating system CPU architecture for which the Node.js binary was compiled.
+                 * Possible values are: `'arm'`, `'arm64'`, `'ia32'`, `'loong64'`, `'mips'`,
+                 * `'mipsel'`, `'ppc64'`, `'riscv64'`, `'s390x'`, and `'x64'`.
+                 *
+                 * ```js
+                 * import { arch } from 'node:process';
+                 *
+                 * console.log(`This processor architecture is ${arch}`);
+                 * ```
+                 * @since v0.5.0
+                 */
+                readonly arch: Architecture;
+                /**
+                 * The `process.platform` property returns a string identifying the operating
+                 * system platform for which the Node.js binary was compiled.
+                 *
+                 * Currently possible values are:
+                 *
+                 * * `'aix'`
+                 * * `'darwin'`
+                 * * `'freebsd'`
+                 * * `'linux'`
+                 * * `'openbsd'`
+                 * * `'sunos'`
+                 * * `'win32'`
+                 *
+                 * ```js
+                 * import { platform } from 'node:process';
+                 *
+                 * console.log(`This platform is ${platform}`);
+                 * ```
+                 *
+                 * The value `'android'` may also be returned if the Node.js is built on the
+                 * Android operating system. However, Android support in Node.js [is experimental](https://github.com/nodejs/node/blob/HEAD/BUILDING.md#androidandroid-based-devices-eg-firefox-os).
+                 * @since v0.1.16
+                 */
+                readonly platform: Platform;
+                /**
+                 * The `process.mainModule` property provides an alternative way of retrieving `require.main`. The difference is that if the main module changes at
+                 * runtime, `require.main` may still refer to the original main module in
+                 * modules that were required before the change occurred. Generally, it's
+                 * safe to assume that the two refer to the same module.
+                 *
+                 * As with `require.main`, `process.mainModule` will be `undefined` if there
+                 * is no entry script.
+                 * @since v0.1.17
+                 * @deprecated Since v14.0.0 - Use `main` instead.
+                 */
+                mainModule?: Module;
+                memoryUsage: MemoryUsageFn;
+                /**
+                 * Gets the amount of memory available to the process (in bytes) based on
+                 * limits imposed by the OS. If there is no such constraint, or the constraint
+                 * is unknown, `0` is returned.
+                 *
+                 * See [`uv_get_constrained_memory`](https://docs.libuv.org/en/v1.x/misc.html#c.uv_get_constrained_memory) for more
+                 * information.
+                 * @since v19.6.0, v18.15.0
+                 */
+                constrainedMemory(): number;
+                /**
+                 * Gets the amount of free memory that is still available to the process (in bytes).
+                 * See [`uv_get_available_memory`](https://nodejs.org/docs/latest-v25.x/api/process.html#processavailablememory) for more information.
+                 * @since v20.13.0
+                 */
+                availableMemory(): number;
+                /**
+                 * The `process.cpuUsage()` method returns the user and system CPU time usage of
+                 * the current process, in an object with properties `user` and `system`, whose
+                 * values are microsecond values (millionth of a second). These values measure time
+                 * spent in user and system code respectively, and may end up being greater than
+                 * actual elapsed time if multiple CPU cores are performing work for this process.
+                 *
+                 * The result of a previous call to `process.cpuUsage()` can be passed as the
+                 * argument to the function, to get a diff reading.
+                 *
+                 * ```js
+                 * import { cpuUsage } from 'node:process';
+                 *
+                 * const startUsage = cpuUsage();
+                 * // { user: 38579, system: 6986 }
+                 *
+                 * // spin the CPU for 500 milliseconds
+                 * const now = Date.now();
+                 * while (Date.now() - now < 500);
+                 *
+                 * console.log(cpuUsage(startUsage));
+                 * // { user: 514883, system: 11226 }
+                 * ```
+                 * @since v6.1.0
+                 * @param previousValue A previous return value from calling `process.cpuUsage()`
+                 */
+                cpuUsage(previousValue?: CpuUsage): CpuUsage;
+                /**
+                 * `process.nextTick()` adds `callback` to the "next tick queue". This queue is
+                 * fully drained after the current operation on the JavaScript stack runs to
+                 * completion and before the event loop is allowed to continue. It's possible to
+                 * create an infinite loop if one were to recursively call `process.nextTick()`.
+                 * See the [Event Loop](https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/#process-nexttick) guide for more background.
+                 *
+                 * ```js
+                 * import { nextTick } from 'node:process';
+                 *
+                 * console.log('start');
+                 * nextTick(() => {
+                 *   console.log('nextTick callback');
+                 * });
+                 * console.log('scheduled');
+                 * // Output:
+                 * // start
+                 * // scheduled
+                 * // nextTick callback
+                 * ```
+                 *
+                 * This is important when developing APIs in order to give users the opportunity
+                 * to assign event handlers _after_ an object has been constructed but before any
+                 * I/O has occurred:
+                 *
+                 * ```js
+                 * import { nextTick } from 'node:process';
+                 *
+                 * function MyThing(options) {
+                 *   this.setupOptions(options);
+                 *
+                 *   nextTick(() => {
+                 *     this.startDoingStuff();
+                 *   });
+                 * }
+                 *
+                 * const thing = new MyThing();
+                 * thing.getReadyForStuff();
+                 *
+                 * // thing.startDoingStuff() gets called now, not before.
+                 * ```
+                 *
+                 * It is very important for APIs to be either 100% synchronous or 100%
+                 * asynchronous. Consider this example:
+                 *
+                 * ```js
+                 * // WARNING!  DO NOT USE!  BAD UNSAFE HAZARD!
+                 * function maybeSync(arg, cb) {
+                 *   if (arg) {
+                 *     cb();
+                 *     return;
+                 *   }
+                 *
+                 *   fs.stat('file', cb);
+                 * }
+                 * ```
+                 *
+                 * This API is hazardous because in the following case:
+                 *
+                 * ```js
+                 * const maybeTrue = Math.random() > 0.5;
+                 *
+                 * maybeSync(maybeTrue, () => {
+                 *   foo();
+                 * });
+                 *
+                 * bar();
+                 * ```
+                 *
+                 * It is not clear whether `foo()` or `bar()` will be called first.
+                 *
+                 * The following approach is much better:
+                 *
+                 * ```js
+                 * import { nextTick } from 'node:process';
+                 *
+                 * function definitelyAsync(arg, cb) {
+                 *   if (arg) {
+                 *     nextTick(cb);
+                 *     return;
+                 *   }
+                 *
+                 *   fs.stat('file', cb);
+                 * }
+                 * ```
+                 * @since v0.1.26
+                 * @param args Additional arguments to pass when invoking the `callback`
+                 */
+                nextTick(callback: Function, ...args: any[]): void;
+                /**
+                 * The process.noDeprecation property indicates whether the --no-deprecation flag is set on the current Node.js process.
+                 * See the documentation for the ['warning' event](https://nodejs.org/docs/latest/api/process.html#event-warning) and the [emitWarning()](https://nodejs.org/docs/latest/api/process.html#processemitwarningwarning-type-code-ctor) method for more information about this flag's behavior.
+                 */
+                noDeprecation?: boolean;
+                /**
+                 * This API is available through the [--permission](https://nodejs.org/api/cli.html#--permission) flag.
+                 *
+                 * `process.permission` is an object whose methods are used to manage permissions for the current process.
+                 * Additional documentation is available in the [Permission Model](https://nodejs.org/api/permissions.html#permission-model).
+                 * @since v20.0.0
+                 */
+                permission: ProcessPermission;
+                /**
+                 * The `process.release` property returns an `Object` containing metadata related
+                 * to the current release, including URLs for the source tarball and headers-only
+                 * tarball.
+                 *
+                 * `process.release` contains the following properties:
+                 *
+                 * ```js
+                 * {
+                 *   name: 'node',
+                 *   lts: 'Hydrogen',
+                 *   sourceUrl: 'https://nodejs.org/download/release/v18.12.0/node-v18.12.0.tar.gz',
+                 *   headersUrl: 'https://nodejs.org/download/release/v18.12.0/node-v18.12.0-headers.tar.gz',
+                 *   libUrl: 'https://nodejs.org/download/release/v18.12.0/win-x64/node.lib'
+                 * }
+                 * ```
+                 *
+                 * In custom builds from non-release versions of the source tree, only the `name` property may be present. The additional properties should not be
+                 * relied upon to exist.
+                 * @since v3.0.0
+                 */
+                readonly release: ProcessRelease;
+                readonly features: ProcessFeatures;
+                /**
+                 * The `process.traceProcessWarnings` property indicates whether the `--trace-warnings` flag
+                 * is set on the current Node.js process. This property allows programmatic control over the
+                 * tracing of warnings, enabling or disabling stack traces for warnings at runtime.
+                 *
+                 * ```js
+                 * // Enable trace warnings
+                 * process.traceProcessWarnings = true;
+                 *
+                 * // Emit a warning with a stack trace
+                 * process.emitWarning('Warning with stack trace');
+                 *
+                 * // Disable trace warnings
+                 * process.traceProcessWarnings = false;
+                 * ```
+                 * @since v6.10.0
+                 */
+                traceProcessWarnings: boolean;
+                /**
+                 * `process.umask()` returns the Node.js process's file mode creation mask. Child
+                 * processes inherit the mask from the parent process.
+                 * @since v0.1.19
+                 * @deprecated Calling `process.umask()` with no argument causes the process-wide umask to be written twice. This introduces a race condition between threads, and is a potential
+                 * security vulnerability. There is no safe, cross-platform alternative API.
+                 */
+                umask(): number;
+                /**
+                 * Can only be set if not in worker thread.
+                 */
+                umask(mask: string | number): number;
+                /**
+                 * The `process.uptime()` method returns the number of seconds the current Node.js
+                 * process has been running.
+                 *
+                 * The return value includes fractions of a second. Use `Math.floor()` to get whole
+                 * seconds.
+                 * @since v0.5.0
+                 */
+                uptime(): number;
+                hrtime: HRTime;
+                /**
+                 * If the Node.js process was spawned with an IPC channel, the process.channel property is a reference to the IPC channel.
+                 * If no IPC channel exists, this property is undefined.
+                 * @since v7.1.0
+                 */
+                channel?: Control;
+                /**
+                 * If Node.js is spawned with an IPC channel, the `process.send()` method can be
+                 * used to send messages to the parent process. Messages will be received as a `'message'` event on the parent's `ChildProcess` object.
+                 *
+                 * If Node.js was not spawned with an IPC channel, `process.send` will be `undefined`.
+                 *
+                 * The message goes through serialization and parsing. The resulting message might
+                 * not be the same as what is originally sent.
+                 * @since v0.5.9
+                 * @param options used to parameterize the sending of certain types of handles. `options` supports the following properties:
+                 */
+                send?(
+                    message: any,
+                    sendHandle?: SendHandle,
+                    options?: MessageOptions,
+                    callback?: (error: Error | null) => void,
+                ): boolean;
+                send?(
+                    message: any,
+                    sendHandle: SendHandle,
+                    callback?: (error: Error | null) => void,
+                ): boolean;
+                send?(
+                    message: any,
+                    callback: (error: Error | null) => void,
+                ): boolean;
+                /**
+                 * If the Node.js process is spawned with an IPC channel (see the `Child Process` and `Cluster` documentation), the `process.disconnect()` method will close the
+                 * IPC channel to the parent process, allowing the child process to exit gracefully
+                 * once there are no other connections keeping it alive.
+                 *
+                 * The effect of calling `process.disconnect()` is the same as calling `ChildProcess.disconnect()` from the parent process.
+                 *
+                 * If the Node.js process was not spawned with an IPC channel, `process.disconnect()` will be `undefined`.
+                 * @since v0.7.2
+                 */
+                disconnect?(): void;
+                /**
+                 * If the Node.js process is spawned with an IPC channel (see the `Child Process` and `Cluster` documentation), the `process.connected` property will return `true` so long as the IPC
+                 * channel is connected and will return `false` after `process.disconnect()` is called.
+                 *
+                 * Once `process.connected` is `false`, it is no longer possible to send messages
+                 * over the IPC channel using `process.send()`.
+                 * @since v0.7.2
+                 */
+                connected: boolean;
+                /**
+                 * The `process.allowedNodeEnvironmentFlags` property is a special,
+                 * read-only `Set` of flags allowable within the `NODE_OPTIONS` environment variable.
+                 *
+                 * `process.allowedNodeEnvironmentFlags` extends `Set`, but overrides `Set.prototype.has` to recognize several different possible flag
+                 * representations. `process.allowedNodeEnvironmentFlags.has()` will
+                 * return `true` in the following cases:
+                 *
+                 * * Flags may omit leading single (`-`) or double (`--`) dashes; e.g., `inspect-brk` for `--inspect-brk`, or `r` for `-r`.
+                 * * Flags passed through to V8 (as listed in `--v8-options`) may replace
+                 * one or more _non-leading_ dashes for an underscore, or vice-versa;
+                 * e.g., `--perf_basic_prof`, `--perf-basic-prof`, `--perf_basic-prof`,
+                 * etc.
+                 * * Flags may contain one or more equals (`=`) characters; all
+                 * characters after and including the first equals will be ignored;
+                 * e.g., `--stack-trace-limit=100`.
+                 * * Flags _must_ be allowable within `NODE_OPTIONS`.
+                 *
+                 * When iterating over `process.allowedNodeEnvironmentFlags`, flags will
+                 * appear only _once_; each will begin with one or more dashes. Flags
+                 * passed through to V8 will contain underscores instead of non-leading
+                 * dashes:
+                 *
+                 * ```js
+                 * import { allowedNodeEnvironmentFlags } from 'node:process';
+                 *
+                 * allowedNodeEnvironmentFlags.forEach((flag) => {
+                 *   // -r
+                 *   // --inspect-brk
+                 *   // --abort_on_uncaught_exception
+                 *   // ...
+                 * });
+                 * ```
+                 *
+                 * The methods `add()`, `clear()`, and `delete()` of`process.allowedNodeEnvironmentFlags` do nothing, and will fail
+                 * silently.
+                 *
+                 * If Node.js was compiled _without_ `NODE_OPTIONS` support (shown in {@link config}), `process.allowedNodeEnvironmentFlags` will
+                 * contain what _would have_ been allowable.
+                 * @since v10.10.0
+                 */
+                allowedNodeEnvironmentFlags: ReadonlySet<string>;
+                /**
+                 * `process.report` is an object whose methods are used to generate diagnostic reports for the current process.
+                 * Additional documentation is available in the [report documentation](https://nodejs.org/docs/latest-v25.x/api/report.html).
+                 * @since v11.8.0
+                 */
+                report: ProcessReport;
+                /**
+                 * ```js
+                 * import { resourceUsage } from 'node:process';
+                 *
+                 * console.log(resourceUsage());
+                 * /*
+                 *   Will output:
+                 *   {
+                 *     userCPUTime: 82872,
+                 *     systemCPUTime: 4143,
+                 *     maxRSS: 33164,
+                 *     sharedMemorySize: 0,
+                 *     unsharedDataSize: 0,
+                 *     unsharedStackSize: 0,
+                 *     minorPageFault: 2469,
+                 *     majorPageFault: 0,
+                 *     swappedOut: 0,
+                 *     fsRead: 0,
+                 *     fsWrite: 8,
+                 *     ipcSent: 0,
+                 *     ipcReceived: 0,
+                 *     signalsCount: 0,
+                 *     voluntaryContextSwitches: 79,
+                 *     involuntaryContextSwitches: 1
+                 *   }
+                 *
+                 * ```
+                 * @since v12.6.0
+                 * @return the resource usage for the current process. All of these values come from the `uv_getrusage` call which returns a [`uv_rusage_t` struct][uv_rusage_t].
+                 */
+                resourceUsage(): ResourceUsage;
+                /**
+                 * The initial value of `process.throwDeprecation` indicates whether the `--throw-deprecation` flag is set on the current Node.js process. `process.throwDeprecation`
+                 * is mutable, so whether or not deprecation warnings result in errors may be altered at runtime. See the documentation for the 'warning' event and the emitWarning()
+                 * method for more information.
+                 *
+                 * ```bash
+                 * $ node --throw-deprecation -p "process.throwDeprecation"
+                 * true
+                 * $ node -p "process.throwDeprecation"
+                 * undefined
+                 * $ node
+                 * > process.emitWarning('test', 'DeprecationWarning');
+                 * undefined
+                 * > (node:26598) DeprecationWarning: test
+                 * > process.throwDeprecation = true;
+                 * true
+                 * > process.emitWarning('test', 'DeprecationWarning');
+                 * Thrown:
+                 * [DeprecationWarning: test] { name: 'DeprecationWarning' }
+                 * ```
+                 * @since v0.9.12
+                 */
+                throwDeprecation: boolean;
+                /**
+                 * The `process.traceDeprecation` property indicates whether the `--trace-deprecation` flag is set on the current Node.js process. See the
+                 * documentation for the `'warning' event` and the `emitWarning() method` for more information about this
+                 * flag's behavior.
+                 * @since v0.8.0
+                 */
+                traceDeprecation: boolean;
+                /**
+                 * An object is "refable" if it implements the Node.js "Refable protocol".
+                 * Specifically, this means that the object implements the `Symbol.for('nodejs.ref')`
+                 * and `Symbol.for('nodejs.unref')` methods. "Ref'd" objects will keep the Node.js
+                 * event loop alive, while "unref'd" objects will not. Historically, this was
+                 * implemented by using `ref()` and `unref()` methods directly on the objects.
+                 * This pattern, however, is being deprecated in favor of the "Refable protocol"
+                 * in order to better support Web Platform API types whose APIs cannot be modified
+                 * to add `ref()` and `unref()` methods but still need to support that behavior.
+                 * @since v22.14.0
+                 * @experimental
+                 * @param maybeRefable An object that may be "refable".
+                 */
+                ref(maybeRefable: any): void;
+                /**
+                 * An object is "unrefable" if it implements the Node.js "Refable protocol".
+                 * Specifically, this means that the object implements the `Symbol.for('nodejs.ref')`
+                 * and `Symbol.for('nodejs.unref')` methods. "Ref'd" objects will keep the Node.js
+                 * event loop alive, while "unref'd" objects will not. Historically, this was
+                 * implemented by using `ref()` and `unref()` methods directly on the objects.
+                 * This pattern, however, is being deprecated in favor of the "Refable protocol"
+                 * in order to better support Web Platform API types whose APIs cannot be modified
+                 * to add `ref()` and `unref()` methods but still need to support that behavior.
+                 * @since v22.14.0
+                 * @experimental
+                 * @param maybeRefable An object that may be "unref'd".
+                 */
+                unref(maybeRefable: any): void;
+                /**
+                 * Replaces the current process with a new process.
+                 *
+                 * This is achieved by using the `execve` POSIX function and therefore no memory or other
+                 * resources from the current process are preserved, except for the standard input,
+                 * standard output and standard error file descriptor.
+                 *
+                 * All other resources are discarded by the system when the processes are swapped, without triggering
+                 * any exit or close events and without running any cleanup handler.
+                 *
+                 * This function will never return, unless an error occurred.
+                 *
+                 * This function is not available on Windows or IBM i.
+                 * @since v22.15.0
+                 * @experimental
+                 * @param file The name or path of the executable file to run.
+                 * @param args List of string arguments. No argument can contain a null-byte (`\u0000`).
+                 * @param env Environment key-value pairs.
+                 * No key or value can contain a null-byte (`\u0000`).
+                 * **Default:** `process.env`.
+                 */
+                execve?(file: string, args?: readonly string[], env?: ProcessEnv): never;
+                // #region InternalEventEmitter
+                addListener<E extends keyof ProcessEventMap>(
+                    eventName: E,
+                    listener: (...args: ProcessEventMap[E]) => void,
+                ): this;
+                addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+                emit<E extends keyof ProcessEventMap>(eventName: E, ...args: ProcessEventMap[E]): boolean;
+                emit(eventName: string | symbol, ...args: any[]): boolean;
+                listenerCount<E extends keyof ProcessEventMap>(
+                    eventName: E,
+                    listener?: (...args: ProcessEventMap[E]) => void,
+                ): number;
+                listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+                listeners<E extends keyof ProcessEventMap>(eventName: E): ((...args: ProcessEventMap[E]) => void)[];
+                listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+                off<E extends keyof ProcessEventMap>(
+                    eventName: E,
+                    listener: (...args: ProcessEventMap[E]) => void,
+                ): this;
+                off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+                on<E extends keyof ProcessEventMap>(
+                    eventName: E,
+                    listener: (...args: ProcessEventMap[E]) => void,
+                ): this;
+                on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+                once<E extends keyof ProcessEventMap>(
+                    eventName: E,
+                    listener: (...args: ProcessEventMap[E]) => void,
+                ): this;
+                once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+                prependListener<E extends keyof ProcessEventMap>(
+                    eventName: E,
+                    listener: (...args: ProcessEventMap[E]) => void,
+                ): this;
+                prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+                prependOnceListener<E extends keyof ProcessEventMap>(
+                    eventName: E,
+                    listener: (...args: ProcessEventMap[E]) => void,
+                ): this;
+                prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+                rawListeners<E extends keyof ProcessEventMap>(eventName: E): ((...args: ProcessEventMap[E]) => void)[];
+                rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+                // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+                removeAllListeners<E extends keyof ProcessEventMap>(eventName?: E): this;
+                removeAllListeners(eventName?: string | symbol): this;
+                removeListener<E extends keyof ProcessEventMap>(
+                    eventName: E,
+                    listener: (...args: ProcessEventMap[E]) => void,
+                ): this;
+                removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+                // #endregion
+            }
+        }
+    }
+    export = process;
+}
+declare module "process" {
+    import process = require("node:process");
+    export = process;
+}
diff --git a/mqtt-backend/node_modules/@types/node/punycode.d.ts b/mqtt-backend/node_modules/@types/node/punycode.d.ts
new file mode 100644
index 0000000..87fdec9
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/punycode.d.ts
@@ -0,0 +1,89 @@
+declare module "node:punycode" {
+    /**
+     * The `punycode.decode()` method converts a [Punycode](https://tools.ietf.org/html/rfc3492) string of ASCII-only
+     * characters to the equivalent string of Unicode codepoints.
+     *
+     * ```js
+     * punycode.decode('maana-pta'); // 'mañana'
+     * punycode.decode('--dqo34k'); // '☃-⌘'
+     * ```
+     * @since v0.5.1
+     */
+    function decode(string: string): string;
+    /**
+     * The `punycode.encode()` method converts a string of Unicode codepoints to a [Punycode](https://tools.ietf.org/html/rfc3492) string of ASCII-only characters.
+     *
+     * ```js
+     * punycode.encode('mañana'); // 'maana-pta'
+     * punycode.encode('☃-⌘'); // '--dqo34k'
+     * ```
+     * @since v0.5.1
+     */
+    function encode(string: string): string;
+    /**
+     * The `punycode.toUnicode()` method converts a string representing a domain name
+     * containing [Punycode](https://tools.ietf.org/html/rfc3492) encoded characters into Unicode. Only the [Punycode](https://tools.ietf.org/html/rfc3492) encoded parts of the domain name are be
+     * converted.
+     *
+     * ```js
+     * // decode domain names
+     * punycode.toUnicode('xn--maana-pta.com'); // 'mañana.com'
+     * punycode.toUnicode('xn----dqo34k.com');  // '☃-⌘.com'
+     * punycode.toUnicode('example.com');       // 'example.com'
+     * ```
+     * @since v0.6.1
+     */
+    function toUnicode(domain: string): string;
+    /**
+     * The `punycode.toASCII()` method converts a Unicode string representing an
+     * Internationalized Domain Name to [Punycode](https://tools.ietf.org/html/rfc3492). Only the non-ASCII parts of the
+     * domain name will be converted. Calling `punycode.toASCII()` on a string that
+     * already only contains ASCII characters will have no effect.
+     *
+     * ```js
+     * // encode domain names
+     * punycode.toASCII('mañana.com');  // 'xn--maana-pta.com'
+     * punycode.toASCII('☃-⌘.com');   // 'xn----dqo34k.com'
+     * punycode.toASCII('example.com'); // 'example.com'
+     * ```
+     * @since v0.6.1
+     */
+    function toASCII(domain: string): string;
+    /**
+     * @deprecated since v7.0.0
+     * The version of the punycode module bundled in Node.js is being deprecated.
+     * In a future major version of Node.js this module will be removed.
+     * Users currently depending on the punycode module should switch to using
+     * the userland-provided Punycode.js module instead.
+     */
+    const ucs2: ucs2;
+    interface ucs2 {
+        /**
+         * @deprecated since v7.0.0
+         * The version of the punycode module bundled in Node.js is being deprecated.
+         * In a future major version of Node.js this module will be removed.
+         * Users currently depending on the punycode module should switch to using
+         * the userland-provided Punycode.js module instead.
+         */
+        decode(string: string): number[];
+        /**
+         * @deprecated since v7.0.0
+         * The version of the punycode module bundled in Node.js is being deprecated.
+         * In a future major version of Node.js this module will be removed.
+         * Users currently depending on the punycode module should switch to using
+         * the userland-provided Punycode.js module instead.
+         */
+        encode(codePoints: readonly number[]): string;
+    }
+    /**
+     * @deprecated since v7.0.0
+     * The version of the punycode module bundled in Node.js is being deprecated.
+     * In a future major version of Node.js this module will be removed.
+     * Users currently depending on the punycode module should switch to using
+     * the userland-provided Punycode.js module instead.
+     */
+    const version: string;
+}
+declare module "punycode" {
+    export * from "node:punycode";
+}
diff --git a/mqtt-backend/node_modules/@types/node/querystring.d.ts b/mqtt-backend/node_modules/@types/node/querystring.d.ts
new file mode 100644
index 0000000..6d821a4
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/querystring.d.ts
@@ -0,0 +1,139 @@
+declare module "node:querystring" {
+    interface StringifyOptions {
+        /**
+         * The function to use when converting URL-unsafe characters to percent-encoding in the query string.
+         * @default `querystring.escape()`
+         */
+        encodeURIComponent?: ((str: string) => string) | undefined;
+    }
+    interface ParseOptions {
+        /**
+         * Specifies the maximum number of keys to parse. Specify `0` to remove key counting limitations.
+         * @default 1000
+         */
+        maxKeys?: number | undefined;
+        /**
+         * The function to use when decoding percent-encoded characters in the query string.
+         * @default `querystring.unescape()`
+         */
+        decodeURIComponent?: ((str: string) => string) | undefined;
+    }
+    interface ParsedUrlQuery extends NodeJS.Dict<string | string[]> {}
+    interface ParsedUrlQueryInput extends
+        NodeJS.Dict<
+            | string
+            | number
+            | boolean
+            | bigint
+            | ReadonlyArray<string | number | boolean | bigint>
+            | null
+        >
+    {}
+    /**
+     * The `querystring.stringify()` method produces a URL query string from a
+     * given `obj` by iterating through the object's "own properties".
+     *
+     * It serializes the following types of values passed in `obj`: [string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type) |
+     * [number](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type) |
+     * [bigint](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt) |
+     * [boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type) |
+     * [string\[\]](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type) |
+     * [number\[\]](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Number_type) |
+     * [bigint\[\]](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/BigInt) |
+     * [boolean\[\]](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Boolean_type) The numeric values must be finite. Any other input values will be coerced to
+     * empty strings.
+     *
+     * ```js
+     * querystring.stringify({ foo: 'bar', baz: ['qux', 'quux'], corge: '' });
+     * // Returns 'foo=bar&#x26;baz=qux&#x26;baz=quux&#x26;corge='
+     *
+     * querystring.stringify({ foo: 'bar', baz: 'qux' }, ';', ':');
+     * // Returns 'foo:bar;baz:qux'
+     * ```
+     *
+     * By default, characters requiring percent-encoding within the query string will
+     * be encoded as UTF-8\. If an alternative encoding is required, then an alternative `encodeURIComponent` option will need to be specified:
+     *
+     * ```js
+     * // Assuming gbkEncodeURIComponent function already exists,
+     *
+     * querystring.stringify({ w: '中文', foo: 'bar' }, null, null,
+     *                       { encodeURIComponent: gbkEncodeURIComponent });
+     * ```
+     * @since v0.1.25
+     * @param obj The object to serialize into a URL query string
+     * @param [sep='&'] The substring used to delimit key and value pairs in the query string.
+     * @param [eq='='] . The substring used to delimit keys and values in the query string.
+     */
+    function stringify(obj?: ParsedUrlQueryInput, sep?: string, eq?: string, options?: StringifyOptions): string;
+    /**
+     * The `querystring.parse()` method parses a URL query string (`str`) into a
+     * collection of key and value pairs.
+     *
+     * For example, the query string `'foo=bar&#x26;abc=xyz&#x26;abc=123'` is parsed into:
+     *
+     * ```json
+     * {
+     *   "foo": "bar",
+     *   "abc": ["xyz", "123"]
+     * }
+     * ```
+     *
+     * The object returned by the `querystring.parse()` method _does not_ prototypically inherit from the JavaScript `Object`. This means that typical `Object` methods such as `obj.toString()`,
+     * `obj.hasOwnProperty()`, and others
+     * are not defined and _will not work_.
+     *
+     * By default, percent-encoded characters within the query string will be assumed
+     * to use UTF-8 encoding. If an alternative character encoding is used, then an
+     * alternative `decodeURIComponent` option will need to be specified:
+     *
+     * ```js
+     * // Assuming gbkDecodeURIComponent function already exists...
+     *
+     * querystring.parse('w=%D6%D0%CE%C4&#x26;foo=bar', null, null,
+     *                   { decodeURIComponent: gbkDecodeURIComponent });
+     * ```
+     * @since v0.1.25
+     * @param str The URL query string to parse
+     * @param [sep='&'] The substring used to delimit key and value pairs in the query string.
+     * @param [eq='='] The substring used to delimit keys and values in the query string.
+     */
+    function parse(str: string, sep?: string, eq?: string, options?: ParseOptions): ParsedUrlQuery;
+    /**
+     * The querystring.encode() function is an alias for querystring.stringify().
+     */
+    const encode: typeof stringify;
+    /**
+     * The querystring.decode() function is an alias for querystring.parse().
+     */
+    const decode: typeof parse;
+    /**
+     * The `querystring.escape()` method performs URL percent-encoding on the given `str` in a manner that is optimized for the specific requirements of URL
+     * query strings.
+     *
+     * The `querystring.escape()` method is used by `querystring.stringify()` and is
+     * generally not expected to be used directly. It is exported primarily to allow
+     * application code to provide a replacement percent-encoding implementation if
+     * necessary by assigning `querystring.escape` to an alternative function.
+     * @since v0.1.25
+     */
+    function escape(str: string): string;
+    /**
+     * The `querystring.unescape()` method performs decoding of URL percent-encoded
+     * characters on the given `str`.
+     *
+     * The `querystring.unescape()` method is used by `querystring.parse()` and is
+     * generally not expected to be used directly. It is exported primarily to allow
+     * application code to provide a replacement decoding implementation if
+     * necessary by assigning `querystring.unescape` to an alternative function.
+     *
+     * By default, the `querystring.unescape()` method will attempt to use the
+     * JavaScript built-in `decodeURIComponent()` method to decode. If that fails,
+     * a safer equivalent that does not throw on malformed URLs will be used.
+     * @since v0.1.25
+     */
+    function unescape(str: string): string;
+}
+declare module "querystring" {
+    export * from "node:querystring";
+}
diff --git a/mqtt-backend/node_modules/@types/node/quic.d.ts b/mqtt-backend/node_modules/@types/node/quic.d.ts
new file mode 100644
index 0000000..7fe6188
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/quic.d.ts
@@ -0,0 +1,897 @@
+declare module "node:quic" {
+    import { KeyObject, webcrypto } from "node:crypto";
+    import { SocketAddress } from "node:net";
+    import { ReadableStream } from "node:stream/web";
+    /**
+     * @since v23.8.0
+     */
+    type OnSessionCallback = (this: QuicEndpoint, session: QuicSession) => void;
+    /**
+     * @since v23.8.0
+     */
+    type OnStreamCallback = (this: QuicSession, stream: QuicStream) => void;
+    /**
+     * @since v23.8.0
+     */
+    type OnDatagramCallback = (this: QuicSession, datagram: Uint8Array, early: boolean) => void;
+    /**
+     * @since v23.8.0
+     */
+    type OnDatagramStatusCallback = (this: QuicSession, id: bigint, status: "lost" | "acknowledged") => void;
+    /**
+     * @since v23.8.0
+     */
+    type OnPathValidationCallback = (
+        this: QuicSession,
+        result: "success" | "failure" | "aborted",
+        newLocalAddress: SocketAddress,
+        newRemoteAddress: SocketAddress,
+        oldLocalAddress: SocketAddress,
+        oldRemoteAddress: SocketAddress,
+        preferredAddress: boolean,
+    ) => void;
+    /**
+     * @since v23.8.0
+     */
+    type OnSessionTicketCallback = (this: QuicSession, ticket: object) => void;
+    /**
+     * @since v23.8.0
+     */
+    type OnVersionNegotiationCallback = (
+        this: QuicSession,
+        version: number,
+        requestedVersions: number[],
+        supportedVersions: number[],
+    ) => void;
+    /**
+     * @since v23.8.0
+     */
+    type OnHandshakeCallback = (
+        this: QuicSession,
+        sni: string,
+        alpn: string,
+        cipher: string,
+        cipherVersion: string,
+        validationErrorReason: string,
+        validationErrorCode: number,
+        earlyDataAccepted: boolean,
+    ) => void;
+    /**
+     * @since v23.8.0
+     */
+    type OnBlockedCallback = (this: QuicStream) => void;
+    /**
+     * @since v23.8.0
+     */
+    type OnStreamErrorCallback = (this: QuicStream, error: any) => void;
+    /**
+     * @since v23.8.0
+     */
+    interface TransportParams {
+        /**
+         * The preferred IPv4 address to advertise.
+         * @since v23.8.0
+         */
+        preferredAddressIpv4?: SocketAddress | undefined;
+        /**
+         * The preferred IPv6 address to advertise.
+         * @since v23.8.0
+         */
+        preferredAddressIpv6?: SocketAddress | undefined;
+        /**
+         * @since v23.8.0
+         */
+        initialMaxStreamDataBidiLocal?: bigint | number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        initialMaxStreamDataBidiRemote?: bigint | number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        initialMaxStreamDataUni?: bigint | number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        initialMaxData?: bigint | number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        initialMaxStreamsBidi?: bigint | number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        initialMaxStreamsUni?: bigint | number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        maxIdleTimeout?: bigint | number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        activeConnectionIDLimit?: bigint | number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        ackDelayExponent?: bigint | number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        maxAckDelay?: bigint | number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        maxDatagramFrameSize?: bigint | number | undefined;
+    }
+    /**
+     * @since v23.8.0
+     */
+    interface SessionOptions {
+        /**
+         * An endpoint to use.
+         * @since v23.8.0
+         */
+        endpoint?: EndpointOptions | QuicEndpoint | undefined;
+        /**
+         * The ALPN protocol identifier.
+         * @since v23.8.0
+         */
+        alpn?: string | undefined;
+        /**
+         * The CA certificates to use for sessions.
+         * @since v23.8.0
+         */
+        ca?: ArrayBuffer | NodeJS.ArrayBufferView | ReadonlyArray<ArrayBuffer | NodeJS.ArrayBufferView> | undefined;
+        /**
+         * Specifies the congestion control algorithm that will be used.
+         * Must be set to one of either `'reno'`, `'cubic'`, or `'bbr'`.
+         *
+         * This is an advanced option that users typically won't have need to specify.
+         * @since v23.8.0
+         */
+        cc?: `${constants.cc}` | undefined;
+        /**
+         * The TLS certificates to use for sessions.
+         * @since v23.8.0
+         */
+        certs?: ArrayBuffer | NodeJS.ArrayBufferView | ReadonlyArray<ArrayBuffer | NodeJS.ArrayBufferView> | undefined;
+        /**
+         * The list of supported TLS 1.3 cipher algorithms.
+         * @since v23.8.0
+         */
+        ciphers?: string | undefined;
+        /**
+         * The CRL to use for sessions.
+         * @since v23.8.0
+         */
+        crl?: ArrayBuffer | NodeJS.ArrayBufferView | ReadonlyArray<ArrayBuffer | NodeJS.ArrayBufferView> | undefined;
+        /**
+         * The list of support TLS 1.3 cipher groups.
+         * @since v23.8.0
+         */
+        groups?: string | undefined;
+        /**
+         * True to enable TLS keylogging output.
+         * @since v23.8.0
+         */
+        keylog?: boolean | undefined;
+        /**
+         * The TLS crypto keys to use for sessions.
+         * @since v23.8.0
+         */
+        keys?: KeyObject | webcrypto.CryptoKey | ReadonlyArray<KeyObject | webcrypto.CryptoKey> | undefined;
+        /**
+         * Specifies the maximum UDP packet payload size.
+         * @since v23.8.0
+         */
+        maxPayloadSize?: bigint | number | undefined;
+        /**
+         * Specifies the maximum stream flow-control window size.
+         * @since v23.8.0
+         */
+        maxStreamWindow?: bigint | number | undefined;
+        /**
+         * Specifies the maximum session flow-control window size.
+         * @since v23.8.0
+         */
+        maxWindow?: bigint | number | undefined;
+        /**
+         * The minimum QUIC version number to allow. This is an advanced option that users
+         * typically won't have need to specify.
+         * @since v23.8.0
+         */
+        minVersion?: number | undefined;
+        /**
+         * When the remote peer advertises a preferred address, this option specifies whether
+         * to use it or ignore it.
+         * @since v23.8.0
+         */
+        preferredAddressPolicy?: "use" | "ignore" | "default" | undefined;
+        /**
+         * True if qlog output should be enabled.
+         * @since v23.8.0
+         */
+        qlog?: boolean | undefined;
+        /**
+         * A session ticket to use for 0RTT session resumption.
+         * @since v23.8.0
+         */
+        sessionTicket?: NodeJS.ArrayBufferView | undefined;
+        /**
+         * Specifies the maximum number of milliseconds a TLS handshake is permitted to take
+         * to complete before timing out.
+         * @since v23.8.0
+         */
+        handshakeTimeout?: bigint | number | undefined;
+        /**
+         * The peer server name to target.
+         * @since v23.8.0
+         */
+        sni?: string | undefined;
+        /**
+         * True to enable TLS tracing output.
+         * @since v23.8.0
+         */
+        tlsTrace?: boolean | undefined;
+        /**
+         * The QUIC transport parameters to use for the session.
+         * @since v23.8.0
+         */
+        transportParams?: TransportParams | undefined;
+        /**
+         * Specifies the maximum number of unacknowledged packets a session should allow.
+         * @since v23.8.0
+         */
+        unacknowledgedPacketThreshold?: bigint | number | undefined;
+        /**
+         * True to require verification of TLS client certificate.
+         * @since v23.8.0
+         */
+        verifyClient?: boolean | undefined;
+        /**
+         * True to require private key verification.
+         * @since v23.8.0
+         */
+        verifyPrivateKey?: boolean | undefined;
+        /**
+         * The QUIC version number to use. This is an advanced option that users typically
+         * won't have need to specify.
+         * @since v23.8.0
+         */
+        version?: number | undefined;
+    }
+    /**
+     * Initiate a new client-side session.
+     *
+     * ```js
+     * import { connect } from 'node:quic';
+     * import { Buffer } from 'node:buffer';
+     *
+     * const enc = new TextEncoder();
+     * const alpn = 'foo';
+     * const client = await connect('123.123.123.123:8888', { alpn });
+     * await client.createUnidirectionalStream({
+     *   body: enc.encode('hello world'),
+     * });
+     * ```
+     *
+     * By default, every call to `connect(...)` will create a new local
+     * `QuicEndpoint` instance bound to a new random local IP port. To
+     * specify the exact local address to use, or to multiplex multiple
+     * QUIC sessions over a single local port, pass the `endpoint` option
+     * with either a `QuicEndpoint` or `EndpointOptions` as the argument.
+     *
+     * ```js
+     * import { QuicEndpoint, connect } from 'node:quic';
+     *
+     * const endpoint = new QuicEndpoint({
+     *   address: '127.0.0.1:1234',
+     * });
+     *
+     * const client = await connect('123.123.123.123:8888', { endpoint });
+     * ```
+     * @since v23.8.0
+     */
+    function connect(address: string | SocketAddress, options?: SessionOptions): Promise<QuicSession>;
+    /**
+     * Configures the endpoint to listen as a server. When a new session is initiated by
+     * a remote peer, the given `onsession` callback will be invoked with the created
+     * session.
+     *
+     * ```js
+     * import { listen } from 'node:quic';
+     *
+     * const endpoint = await listen((session) => {
+     *   // ... handle the session
+     * });
+     *
+     * // Closing the endpoint allows any sessions open when close is called
+     * // to complete naturally while preventing new sessions from being
+     * // initiated. Once all existing sessions have finished, the endpoint
+     * // will be destroyed. The call returns a promise that is resolved once
+     * // the endpoint is destroyed.
+     * await endpoint.close();
+     * ```
+     *
+     * By default, every call to `listen(...)` will create a new local
+     * `QuicEndpoint` instance bound to a new random local IP port. To
+     * specify the exact local address to use, or to multiplex multiple
+     * QUIC sessions over a single local port, pass the `endpoint` option
+     * with either a `QuicEndpoint` or `EndpointOptions` as the argument.
+     *
+     * At most, any single `QuicEndpoint` can only be configured to listen as
+     * a server once.
+     * @since v23.8.0
+     */
+    function listen(onsession: OnSessionCallback, options?: SessionOptions): Promise<QuicEndpoint>;
+    /**
+     * The endpoint configuration options passed when constructing a new `QuicEndpoint` instance.
+     * @since v23.8.0
+     */
+    interface EndpointOptions {
+        /**
+         * If not specified the endpoint will bind to IPv4 `localhost` on a random port.
+         * @since v23.8.0
+         */
+        address?: SocketAddress | string | undefined;
+        /**
+         * The endpoint maintains an internal cache of validated socket addresses as a
+         * performance optimization. This option sets the maximum number of addresses
+         * that are cache. This is an advanced option that users typically won't have
+         * need to specify.
+         * @since v23.8.0
+         */
+        addressLRUSize?: bigint | number | undefined;
+        /**
+         * When `true`, indicates that the endpoint should bind only to IPv6 addresses.
+         * @since v23.8.0
+         */
+        ipv6Only?: boolean | undefined;
+        /**
+         * Specifies the maximum number of concurrent sessions allowed per remote peer address.
+         * @since v23.8.0
+         */
+        maxConnectionsPerHost?: bigint | number | undefined;
+        /**
+         * Specifies the maximum total number of concurrent sessions.
+         * @since v23.8.0
+         */
+        maxConnectionsTotal?: bigint | number | undefined;
+        /**
+         * Specifies the maximum number of QUIC retry attempts allowed per remote peer address.
+         * @since v23.8.0
+         */
+        maxRetries?: bigint | number | undefined;
+        /**
+         * Specifies the maximum number of stateless resets that are allowed per remote peer address.
+         * @since v23.8.0
+         */
+        maxStatelessResetsPerHost?: bigint | number | undefined;
+        /**
+         * Specifies the length of time a QUIC retry token is considered valid.
+         * @since v23.8.0
+         */
+        retryTokenExpiration?: bigint | number | undefined;
+        /**
+         * Specifies the 16-byte secret used to generate QUIC retry tokens.
+         * @since v23.8.0
+         */
+        resetTokenSecret?: NodeJS.ArrayBufferView | undefined;
+        /**
+         * Specifies the length of time a QUIC token is considered valid.
+         * @since v23.8.0
+         */
+        tokenExpiration?: bigint | number | undefined;
+        /**
+         * Specifies the 16-byte secret used to generate QUIC tokens.
+         * @since v23.8.0
+         */
+        tokenSecret?: NodeJS.ArrayBufferView | undefined;
+        /**
+         * @since v23.8.0
+         */
+        udpReceiveBufferSize?: number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        udpSendBufferSize?: number | undefined;
+        /**
+         * @since v23.8.0
+         */
+        udpTTL?: number | undefined;
+        /**
+         * When `true`, requires that the endpoint validate peer addresses using retry packets
+         * while establishing a new connection.
+         * @since v23.8.0
+         */
+        validateAddress?: boolean | undefined;
+    }
+    /**
+     * A `QuicEndpoint` encapsulates the local UDP-port binding for QUIC. It can be
+     * used as both a client and a server.
+     * @since v23.8.0
+     */
+    class QuicEndpoint implements AsyncDisposable {
+        constructor(options?: EndpointOptions);
+        /**
+         * The local UDP socket address to which the endpoint is bound, if any.
+         *
+         * If the endpoint is not currently bound then the value will be `undefined`. Read only.
+         * @since v23.8.0
+         */
+        readonly address: SocketAddress | undefined;
+        /**
+         * When `endpoint.busy` is set to true, the endpoint will temporarily reject
+         * new sessions from being created. Read/write.
+         *
+         * ```js
+         * // Mark the endpoint busy. New sessions will be prevented.
+         * endpoint.busy = true;
+         *
+         * // Mark the endpoint free. New session will be allowed.
+         * endpoint.busy = false;
+         * ```
+         *
+         * The `busy` property is useful when the endpoint is under heavy load and needs to
+         * temporarily reject new sessions while it catches up.
+         * @since v23.8.0
+         */
+        busy: boolean;
+        /**
+         * Gracefully close the endpoint. The endpoint will close and destroy itself when
+         * all currently open sessions close. Once called, new sessions will be rejected.
+         *
+         * Returns a promise that is fulfilled when the endpoint is destroyed.
+         * @since v23.8.0
+         */
+        close(): Promise<void>;
+        /**
+         * A promise that is fulfilled when the endpoint is destroyed. This will be the same promise that is
+         * returned by the `endpoint.close()` function. Read only.
+         * @since v23.8.0
+         */
+        readonly closed: Promise<void>;
+        /**
+         * True if `endpoint.close()` has been called and closing the endpoint has not yet completed.
+         * Read only.
+         * @since v23.8.0
+         */
+        readonly closing: boolean;
+        /**
+         * Forcefully closes the endpoint by forcing all open sessions to be immediately
+         * closed.
+         * @since v23.8.0
+         */
+        destroy(error?: any): void;
+        /**
+         * True if `endpoint.destroy()` has been called. Read only.
+         * @since v23.8.0
+         */
+        readonly destroyed: boolean;
+        /**
+         * The statistics collected for an active session. Read only.
+         * @since v23.8.0
+         */
+        readonly stats: QuicEndpoint.Stats;
+        /**
+         * Calls `endpoint.close()` and returns a promise that fulfills when the
+         * endpoint has closed.
+         * @since v23.8.0
+         */
+        [Symbol.asyncDispose](): Promise<void>;
+    }
+    namespace QuicEndpoint {
+        /**
+         * A view of the collected statistics for an endpoint.
+         * @since v23.8.0
+         */
+        class Stats {
+            private constructor();
+            /**
+             * A timestamp indicating the moment the endpoint was created. Read only.
+             * @since v23.8.0
+             */
+            readonly createdAt: bigint;
+            /**
+             * A timestamp indicating the moment the endpoint was destroyed. Read only.
+             * @since v23.8.0
+             */
+            readonly destroyedAt: bigint;
+            /**
+             * The total number of bytes received by this endpoint. Read only.
+             * @since v23.8.0
+             */
+            readonly bytesReceived: bigint;
+            /**
+             * The total number of bytes sent by this endpoint. Read only.
+             * @since v23.8.0
+             */
+            readonly bytesSent: bigint;
+            /**
+             * The total number of QUIC packets successfully received by this endpoint. Read only.
+             * @since v23.8.0
+             */
+            readonly packetsReceived: bigint;
+            /**
+             * The total number of QUIC packets successfully sent by this endpoint. Read only.
+             * @since v23.8.0
+             */
+            readonly packetsSent: bigint;
+            /**
+             * The total number of peer-initiated sessions received by this endpoint. Read only.
+             * @since v23.8.0
+             */
+            readonly serverSessions: bigint;
+            /**
+             * The total number of sessions initiated by this endpoint. Read only.
+             * @since v23.8.0
+             */
+            readonly clientSessions: bigint;
+            /**
+             * The total number of times an initial packet was rejected due to the
+             * endpoint being marked busy. Read only.
+             * @since v23.8.0
+             */
+            readonly serverBusyCount: bigint;
+            /**
+             * The total number of QUIC retry attempts on this endpoint. Read only.
+             * @since v23.8.0
+             */
+            readonly retryCount: bigint;
+            /**
+             * The total number sessions rejected due to QUIC version mismatch. Read only.
+             * @since v23.8.0
+             */
+            readonly versionNegotiationCount: bigint;
+            /**
+             * The total number of stateless resets handled by this endpoint. Read only.
+             * @since v23.8.0
+             */
+            readonly statelessResetCount: bigint;
+            /**
+             * The total number of sessions that were closed before handshake completed. Read only.
+             * @since v23.8.0
+             */
+            readonly immediateCloseCount: bigint;
+        }
+    }
+    interface CreateStreamOptions {
+        body?: ArrayBuffer | NodeJS.ArrayBufferView | Blob | undefined;
+        sendOrder?: number | undefined;
+    }
+    interface SessionPath {
+        local: SocketAddress;
+        remote: SocketAddress;
+    }
+    /**
+     * A `QuicSession` represents the local side of a QUIC connection.
+     * @since v23.8.0
+     */
+    class QuicSession implements AsyncDisposable {
+        private constructor();
+        /**
+         * Initiate a graceful close of the session. Existing streams will be allowed
+         * to complete but no new streams will be opened. Once all streams have closed,
+         * the session will be destroyed. The returned promise will be fulfilled once
+         * the session has been destroyed.
+         * @since v23.8.0
+         */
+        close(): Promise<void>;
+        /**
+         * A promise that is fulfilled once the session is destroyed.
+         * @since v23.8.0
+         */
+        readonly closed: Promise<void>;
+        /**
+         * Immediately destroy the session. All streams will be destroys and the
+         * session will be closed.
+         * @since v23.8.0
+         */
+        destroy(error?: any): void;
+        /**
+         * True if `session.destroy()` has been called. Read only.
+         * @since v23.8.0
+         */
+        readonly destroyed: boolean;
+        /**
+         * The endpoint that created this session. Read only.
+         * @since v23.8.0
+         */
+        readonly endpoint: QuicEndpoint;
+        /**
+         * The callback to invoke when a new stream is initiated by a remote peer. Read/write.
+         * @since v23.8.0
+         */
+        onstream: OnStreamCallback | undefined;
+        /**
+         * The callback to invoke when a new datagram is received from a remote peer. Read/write.
+         * @since v23.8.0
+         */
+        ondatagram: OnDatagramCallback | undefined;
+        /**
+         * The callback to invoke when the status of a datagram is updated. Read/write.
+         * @since v23.8.0
+         */
+        ondatagramstatus: OnDatagramStatusCallback | undefined;
+        /**
+         * The callback to invoke when the path validation is updated. Read/write.
+         * @since v23.8.0
+         */
+        onpathvalidation: OnPathValidationCallback | undefined;
+        /**
+         * The callback to invoke when a new session ticket is received. Read/write.
+         * @since v23.8.0
+         */
+        onsessionticket: OnSessionTicketCallback | undefined;
+        /**
+         * The callback to invoke when a version negotiation is initiated. Read/write.
+         * @since v23.8.0
+         */
+        onversionnegotiation: OnVersionNegotiationCallback | undefined;
+        /**
+         * The callback to invoke when the TLS handshake is completed. Read/write.
+         * @since v23.8.0
+         */
+        onhandshake: OnHandshakeCallback | undefined;
+        /**
+         * Open a new bidirectional stream. If the `body` option is not specified,
+         * the outgoing stream will be half-closed.
+         * @since v23.8.0
+         */
+        createBidirectionalStream(options?: CreateStreamOptions): Promise<QuicStream>;
+        /**
+         * Open a new unidirectional stream. If the `body` option is not specified,
+         * the outgoing stream will be closed.
+         * @since v23.8.0
+         */
+        createUnidirectionalStream(options?: CreateStreamOptions): Promise<QuicStream>;
+        /**
+         * The local and remote socket addresses associated with the session. Read only.
+         * @since v23.8.0
+         */
+        path: SessionPath | undefined;
+        /**
+         * Sends an unreliable datagram to the remote peer, returning the datagram ID.
+         * If the datagram payload is specified as an `ArrayBufferView`, then ownership of
+         * that view will be transfered to the underlying stream.
+         * @since v23.8.0
+         */
+        sendDatagram(datagram: string | NodeJS.ArrayBufferView): bigint;
+        /**
+         * Return the current statistics for the session. Read only.
+         * @since v23.8.0
+         */
+        readonly stats: QuicSession.Stats;
+        /**
+         * Initiate a key update for the session.
+         * @since v23.8.0
+         */
+        updateKey(): void;
+        /**
+         * Calls `session.close()` and returns a promise that fulfills when the
+         * session has closed.
+         * @since v23.8.0
+         */
+        [Symbol.asyncDispose](): Promise<void>;
+    }
+    namespace QuicSession {
+        /**
+         * @since v23.8.0
+         */
+        class Stats {
+            private constructor();
+            /**
+             * @since v23.8.0
+             */
+            readonly createdAt: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly closingAt: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly handshakeCompletedAt: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly handshakeConfirmedAt: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly bytesReceived: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly bytesSent: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly bidiInStreamCount: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly bidiOutStreamCount: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly uniInStreamCount: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly uniOutStreamCount: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly maxBytesInFlights: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly bytesInFlight: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly blockCount: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly cwnd: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly latestRtt: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly minRtt: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly rttVar: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly smoothedRtt: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly ssthresh: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly datagramsReceived: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly datagramsSent: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly datagramsAcknowledged: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly datagramsLost: bigint;
+        }
+    }
+    /**
+     * @since v23.8.0
+     */
+    class QuicStream {
+        private constructor();
+        /**
+         * A promise that is fulfilled when the stream is fully closed.
+         * @since v23.8.0
+         */
+        readonly closed: Promise<void>;
+        /**
+         * Immediately and abruptly destroys the stream.
+         * @since v23.8.0
+         */
+        destroy(error?: any): void;
+        /**
+         * True if `stream.destroy()` has been called.
+         * @since v23.8.0
+         */
+        readonly destroyed: boolean;
+        /**
+         * The directionality of the stream. Read only.
+         * @since v23.8.0
+         */
+        readonly direction: "bidi" | "uni";
+        /**
+         * The stream ID. Read only.
+         * @since v23.8.0
+         */
+        readonly id: bigint;
+        /**
+         * The callback to invoke when the stream is blocked. Read/write.
+         * @since v23.8.0
+         */
+        onblocked: OnBlockedCallback | undefined;
+        /**
+         * The callback to invoke when the stream is reset. Read/write.
+         * @since v23.8.0
+         */
+        onreset: OnStreamErrorCallback | undefined;
+        /**
+         * @since v23.8.0
+         */
+        readonly readable: ReadableStream<Uint8Array>;
+        /**
+         * The session that created this stream. Read only.
+         * @since v23.8.0
+         */
+        readonly session: QuicSession;
+        /**
+         * The current statistics for the stream. Read only.
+         * @since v23.8.0
+         */
+        readonly stats: QuicStream.Stats;
+    }
+    namespace QuicStream {
+        /**
+         * @since v23.8.0
+         */
+        class Stats {
+            private constructor();
+            /**
+             * @since v23.8.0
+             */
+            readonly ackedAt: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly bytesReceived: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly bytesSent: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly createdAt: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly destroyedAt: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly finalSize: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly isConnected: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly maxOffset: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly maxOffsetAcknowledged: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly maxOffsetReceived: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly openedAt: bigint;
+            /**
+             * @since v23.8.0
+             */
+            readonly receivedAt: bigint;
+        }
+    }
+    namespace constants {
+        enum cc {
+            RENO = "reno",
+            CUBIC = "cubic",
+            BBR = "bbr",
+        }
+        const DEFAULT_CIPHERS: string;
+        const DEFAULT_GROUPS: string;
+    }
+}
diff --git a/mqtt-backend/node_modules/@types/node/readline.d.ts b/mqtt-backend/node_modules/@types/node/readline.d.ts
new file mode 100644
index 0000000..5042975
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/readline.d.ts
@@ -0,0 +1,507 @@
+declare module "node:readline" {
+    import { Abortable, EventEmitter, InternalEventEmitter } from "node:events";
+    interface Key {
+        sequence?: string | undefined;
+        name?: string | undefined;
+        ctrl?: boolean | undefined;
+        meta?: boolean | undefined;
+        shift?: boolean | undefined;
+    }
+    interface InterfaceEventMap {
+        "close": [];
+        "error": [error: Error];
+        "history": [history: string[]];
+        "line": [input: string];
+        "pause": [];
+        "resume": [];
+        "SIGCONT": [];
+        "SIGINT": [];
+        "SIGTSTP": [];
+    }
+    /**
+     * Instances of the `readline.Interface` class are constructed using the `readline.createInterface()` method. Every instance is associated with a
+     * single `input` [Readable](https://nodejs.org/docs/latest-v25.x/api/stream.html#readable-streams) stream and a single `output` [Writable](https://nodejs.org/docs/latest-v25.x/api/stream.html#writable-streams) stream.
+     * The `output` stream is used to print prompts for user input that arrives on,
+     * and is read from, the `input` stream.
+     * @since v0.1.104
+     */
+    class Interface implements EventEmitter, Disposable {
+        /**
+         * NOTE: According to the documentation:
+         *
+         * > Instances of the `readline.Interface` class are constructed using the
+         * > `readline.createInterface()` method.
+         *
+         * @see https://nodejs.org/dist/latest-v25.x/docs/api/readline.html#class-interfaceconstructor
+         */
+        protected constructor(
+            input: NodeJS.ReadableStream,
+            output?: NodeJS.WritableStream,
+            completer?: Completer | AsyncCompleter,
+            terminal?: boolean,
+        );
+        /**
+         * NOTE: According to the documentation:
+         *
+         * > Instances of the `readline.Interface` class are constructed using the
+         * > `readline.createInterface()` method.
+         *
+         * @see https://nodejs.org/dist/latest-v25.x/docs/api/readline.html#class-interfaceconstructor
+         */
+        protected constructor(options: ReadLineOptions);
+        readonly terminal: boolean;
+        /**
+         * The current input data being processed by node.
+         *
+         * This can be used when collecting input from a TTY stream to retrieve the
+         * current value that has been processed thus far, prior to the `line` event
+         * being emitted. Once the `line` event has been emitted, this property will
+         * be an empty string.
+         *
+         * Be aware that modifying the value during the instance runtime may have
+         * unintended consequences if `rl.cursor` is not also controlled.
+         *
+         * **If not using a TTY stream for input, use the `'line'` event.**
+         *
+         * One possible use case would be as follows:
+         *
+         * ```js
+         * const values = ['lorem ipsum', 'dolor sit amet'];
+         * const rl = readline.createInterface(process.stdin);
+         * const showResults = debounce(() => {
+         *   console.log(
+         *     '\n',
+         *     values.filter((val) => val.startsWith(rl.line)).join(' '),
+         *   );
+         * }, 300);
+         * process.stdin.on('keypress', (c, k) => {
+         *   showResults();
+         * });
+         * ```
+         * @since v0.1.98
+         */
+        readonly line: string;
+        /**
+         * The cursor position relative to `rl.line`.
+         *
+         * This will track where the current cursor lands in the input string, when
+         * reading input from a TTY stream. The position of cursor determines the
+         * portion of the input string that will be modified as input is processed,
+         * as well as the column where the terminal caret will be rendered.
+         * @since v0.1.98
+         */
+        readonly cursor: number;
+        /**
+         * The `rl.getPrompt()` method returns the current prompt used by `rl.prompt()`.
+         * @since v15.3.0, v14.17.0
+         * @return the current prompt string
+         */
+        getPrompt(): string;
+        /**
+         * The `rl.setPrompt()` method sets the prompt that will be written to `output` whenever `rl.prompt()` is called.
+         * @since v0.1.98
+         */
+        setPrompt(prompt: string): void;
+        /**
+         * The `rl.prompt()` method writes the `Interface` instances configured`prompt` to a new line in `output` in order to provide a user with a new
+         * location at which to provide input.
+         *
+         * When called, `rl.prompt()` will resume the `input` stream if it has been
+         * paused.
+         *
+         * If the `Interface` was created with `output` set to `null` or `undefined` the prompt is not written.
+         * @since v0.1.98
+         * @param preserveCursor If `true`, prevents the cursor placement from being reset to `0`.
+         */
+        prompt(preserveCursor?: boolean): void;
+        /**
+         * The `rl.question()` method displays the `query` by writing it to the `output`,
+         * waits for user input to be provided on `input`, then invokes the `callback` function passing the provided input as the first argument.
+         *
+         * When called, `rl.question()` will resume the `input` stream if it has been
+         * paused.
+         *
+         * If the `Interface` was created with `output` set to `null` or `undefined` the `query` is not written.
+         *
+         * The `callback` function passed to `rl.question()` does not follow the typical
+         * pattern of accepting an `Error` object or `null` as the first argument.
+         * The `callback` is called with the provided answer as the only argument.
+         *
+         * An error will be thrown if calling `rl.question()` after `rl.close()`.
+         *
+         * Example usage:
+         *
+         * ```js
+         * rl.question('What is your favorite food? ', (answer) => {
+         *   console.log(`Oh, so your favorite food is ${answer}`);
+         * });
+         * ```
+         *
+         * Using an `AbortController` to cancel a question.
+         *
+         * ```js
+         * const ac = new AbortController();
+         * const signal = ac.signal;
+         *
+         * rl.question('What is your favorite food? ', { signal }, (answer) => {
+         *   console.log(`Oh, so your favorite food is ${answer}`);
+         * });
+         *
+         * signal.addEventListener('abort', () => {
+         *   console.log('The food question timed out');
+         * }, { once: true });
+         *
+         * setTimeout(() => ac.abort(), 10000);
+         * ```
+         * @since v0.3.3
+         * @param query A statement or query to write to `output`, prepended to the prompt.
+         * @param callback A callback function that is invoked with the user's input in response to the `query`.
+         */
+        question(query: string, callback: (answer: string) => void): void;
+        question(query: string, options: Abortable, callback: (answer: string) => void): void;
+        /**
+         * The `rl.pause()` method pauses the `input` stream, allowing it to be resumed
+         * later if necessary.
+         *
+         * Calling `rl.pause()` does not immediately pause other events (including `'line'`) from being emitted by the `Interface` instance.
+         * @since v0.3.4
+         */
+        pause(): this;
+        /**
+         * The `rl.resume()` method resumes the `input` stream if it has been paused.
+         * @since v0.3.4
+         */
+        resume(): this;
+        /**
+         * The `rl.close()` method closes the `Interface` instance and
+         * relinquishes control over the `input` and `output` streams. When called,
+         * the `'close'` event will be emitted.
+         *
+         * Calling `rl.close()` does not immediately stop other events (including `'line'`)
+         * from being emitted by the `Interface` instance.
+         * @since v0.1.98
+         */
+        close(): void;
+        /**
+         * Alias for `rl.close()`.
+         * @since v22.15.0
+         */
+        [Symbol.dispose](): void;
+        /**
+         * The `rl.write()` method will write either `data` or a key sequence identified
+         * by `key` to the `output`. The `key` argument is supported only if `output` is
+         * a `TTY` text terminal. See `TTY keybindings` for a list of key
+         * combinations.
+         *
+         * If `key` is specified, `data` is ignored.
+         *
+         * When called, `rl.write()` will resume the `input` stream if it has been
+         * paused.
+         *
+         * If the `Interface` was created with `output` set to `null` or `undefined` the `data` and `key` are not written.
+         *
+         * ```js
+         * rl.write('Delete this!');
+         * // Simulate Ctrl+U to delete the line written previously
+         * rl.write(null, { ctrl: true, name: 'u' });
+         * ```
+         *
+         * The `rl.write()` method will write the data to the `readline` `Interface`'s `input` _as if it were provided by the user_.
+         * @since v0.1.98
+         */
+        write(data: string | Buffer, key?: Key): void;
+        write(data: undefined | null | string | Buffer, key: Key): void;
+        /**
+         * Returns the real position of the cursor in relation to the input
+         * prompt + string. Long input (wrapping) strings, as well as multiple
+         * line prompts are included in the calculations.
+         * @since v13.5.0, v12.16.0
+         */
+        getCursorPos(): CursorPos;
+        [Symbol.asyncIterator](): NodeJS.AsyncIterator<string>;
+    }
+    interface Interface extends InternalEventEmitter<InterfaceEventMap> {}
+    type ReadLine = Interface; // type forwarded for backwards compatibility
+    type Completer = (line: string) => CompleterResult;
+    type AsyncCompleter = (
+        line: string,
+        callback: (err?: null | Error, result?: CompleterResult) => void,
+    ) => void;
+    type CompleterResult = [string[], string];
+    interface ReadLineOptions {
+        /**
+         * The [`Readable`](https://nodejs.org/docs/latest-v25.x/api/stream.html#readable-streams) stream to listen to
+         */
+        input: NodeJS.ReadableStream;
+        /**
+         * The [`Writable`](https://nodejs.org/docs/latest-v25.x/api/stream.html#writable-streams) stream to write readline data to.
+         */
+        output?: NodeJS.WritableStream | undefined;
+        /**
+         * An optional function used for Tab autocompletion.
+         */
+        completer?: Completer | AsyncCompleter | undefined;
+        /**
+         * `true` if the `input` and `output` streams should be treated like a TTY,
+         * and have ANSI/VT100 escape codes written to it.
+         * Default: checking `isTTY` on the `output` stream upon instantiation.
+         */
+        terminal?: boolean | undefined;
+        /**
+         * Initial list of history lines.
+         * This option makes sense only if `terminal` is set to `true` by the user or by an internal `output` check,
+         * otherwise the history caching mechanism is not initialized at all.
+         * @default []
+         */
+        history?: string[] | undefined;
+        /**
+         * Maximum number of history lines retained.
+         * To disable the history set this value to `0`.
+         * This option makes sense only if `terminal` is set to `true` by the user or by an internal `output` check,
+         * otherwise the history caching mechanism is not initialized at all.
+         * @default 30
+         */
+        historySize?: number | undefined;
+        /**
+         * If `true`, when a new input line added to the history list duplicates an older one,
+         * this removes the older line from the list.
+         * @default false
+         */
+        removeHistoryDuplicates?: boolean | undefined;
+        /**
+         * The prompt string to use.
+         * @default "> "
+         */
+        prompt?: string | undefined;
+        /**
+         * If the delay between `\r` and `\n` exceeds `crlfDelay` milliseconds,
+         * both `\r` and `\n` will be treated as separate end-of-line input.
+         * `crlfDelay` will be coerced to a number no less than `100`.
+         * It can be set to `Infinity`, in which case
+         * `\r` followed by `\n` will always be considered a single newline
+         * (which may be reasonable for [reading files](https://nodejs.org/docs/latest-v25.x/api/readline.html#example-read-file-stream-line-by-line) with `\r\n` line delimiter).
+         * @default 100
+         */
+        crlfDelay?: number | undefined;
+        /**
+         * The duration `readline` will wait for a character
+         * (when reading an ambiguous key sequence in milliseconds
+         * one that can both form a complete key sequence using the input read so far
+         * and can take additional input to complete a longer key sequence).
+         * @default 500
+         */
+        escapeCodeTimeout?: number | undefined;
+        /**
+         * The number of spaces a tab is equal to (minimum 1).
+         * @default 8
+         */
+        tabSize?: number | undefined;
+        /**
+         * Allows closing the interface using an AbortSignal.
+         * Aborting the signal will internally call `close` on the interface.
+         */
+        signal?: AbortSignal | undefined;
+    }
+    /**
+     * The `readline.createInterface()` method creates a new `readline.Interface` instance.
+     *
+     * ```js
+     * import readline from 'node:readline';
+     * const rl = readline.createInterface({
+     *   input: process.stdin,
+     *   output: process.stdout,
+     * });
+     * ```
+     *
+     * Once the `readline.Interface` instance is created, the most common case is to
+     * listen for the `'line'` event:
+     *
+     * ```js
+     * rl.on('line', (line) => {
+     *   console.log(`Received: ${line}`);
+     * });
+     * ```
+     *
+     * If `terminal` is `true` for this instance then the `output` stream will get
+     * the best compatibility if it defines an `output.columns` property and emits
+     * a `'resize'` event on the `output` if or when the columns ever change
+     * (`process.stdout` does this automatically when it is a TTY).
+     *
+     * When creating a `readline.Interface` using `stdin` as input, the program
+     * will not terminate until it receives an [EOF character](https://en.wikipedia.org/wiki/End-of-file#EOF_character). To exit without
+     * waiting for user input, call `process.stdin.unref()`.
+     * @since v0.1.98
+     */
+    function createInterface(
+        input: NodeJS.ReadableStream,
+        output?: NodeJS.WritableStream,
+        completer?: Completer | AsyncCompleter,
+        terminal?: boolean,
+    ): Interface;
+    function createInterface(options: ReadLineOptions): Interface;
+    /**
+     * The `readline.emitKeypressEvents()` method causes the given `Readable` stream to begin emitting `'keypress'` events corresponding to received input.
+     *
+     * Optionally, `interface` specifies a `readline.Interface` instance for which
+     * autocompletion is disabled when copy-pasted input is detected.
+     *
+     * If the `stream` is a `TTY`, then it must be in raw mode.
+     *
+     * This is automatically called by any readline instance on its `input` if the `input` is a terminal. Closing the `readline` instance does not stop
+     * the `input` from emitting `'keypress'` events.
+     *
+     * ```js
+     * readline.emitKeypressEvents(process.stdin);
+     * if (process.stdin.isTTY)
+     *   process.stdin.setRawMode(true);
+     * ```
+     *
+     * ## Example: Tiny CLI
+     *
+     * The following example illustrates the use of `readline.Interface` class to
+     * implement a small command-line interface:
+     *
+     * ```js
+     * import readline from 'node:readline';
+     * const rl = readline.createInterface({
+     *   input: process.stdin,
+     *   output: process.stdout,
+     *   prompt: 'OHAI> ',
+     * });
+     *
+     * rl.prompt();
+     *
+     * rl.on('line', (line) => {
+     *   switch (line.trim()) {
+     *     case 'hello':
+     *       console.log('world!');
+     *       break;
+     *     default:
+     *       console.log(`Say what? I might have heard '${line.trim()}'`);
+     *       break;
+     *   }
+     *   rl.prompt();
+     * }).on('close', () => {
+     *   console.log('Have a great day!');
+     *   process.exit(0);
+     * });
+     * ```
+     *
+     * ## Example: Read file stream line-by-Line
+     *
+     * A common use case for `readline` is to consume an input file one line at a
+     * time. The easiest way to do so is leveraging the `fs.ReadStream` API as
+     * well as a `for await...of` loop:
+     *
+     * ```js
+     * import fs from 'node:fs';
+     * import readline from 'node:readline';
+     *
+     * async function processLineByLine() {
+     *   const fileStream = fs.createReadStream('input.txt');
+     *
+     *   const rl = readline.createInterface({
+     *     input: fileStream,
+     *     crlfDelay: Infinity,
+     *   });
+     *   // Note: we use the crlfDelay option to recognize all instances of CR LF
+     *   // ('\r\n') in input.txt as a single line break.
+     *
+     *   for await (const line of rl) {
+     *     // Each line in input.txt will be successively available here as `line`.
+     *     console.log(`Line from file: ${line}`);
+     *   }
+     * }
+     *
+     * processLineByLine();
+     * ```
+     *
+     * Alternatively, one could use the `'line'` event:
+     *
+     * ```js
+     * import fs from 'node:fs';
+     * import readline from 'node:readline';
+     *
+     * const rl = readline.createInterface({
+     *   input: fs.createReadStream('sample.txt'),
+     *   crlfDelay: Infinity,
+     * });
+     *
+     * rl.on('line', (line) => {
+     *   console.log(`Line from file: ${line}`);
+     * });
+     * ```
+     *
+     * Currently, `for await...of` loop can be a bit slower. If `async` / `await` flow and speed are both essential, a mixed approach can be applied:
+     *
+     * ```js
+     * import { once } from 'node:events';
+     * import { createReadStream } from 'node:fs';
+     * import { createInterface } from 'node:readline';
+     *
+     * (async function processLineByLine() {
+     *   try {
+     *     const rl = createInterface({
+     *       input: createReadStream('big-file.txt'),
+     *       crlfDelay: Infinity,
+     *     });
+     *
+     *     rl.on('line', (line) => {
+     *       // Process the line.
+     *     });
+     *
+     *     await once(rl, 'close');
+     *
+     *     console.log('File processed.');
+     *   } catch (err) {
+     *     console.error(err);
+     *   }
+     * })();
+     * ```
+     * @since v0.7.7
+     */
+    function emitKeypressEvents(stream: NodeJS.ReadableStream, readlineInterface?: Interface): void;
+    type Direction = -1 | 0 | 1;
+    interface CursorPos {
+        rows: number;
+        cols: number;
+    }
+    /**
+     * The `readline.clearLine()` method clears current line of given [TTY](https://nodejs.org/docs/latest-v25.x/api/tty.html) stream
+     * in a specified direction identified by `dir`.
+     * @since v0.7.7
+     * @param callback Invoked once the operation completes.
+     * @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
+     */
+    function clearLine(stream: NodeJS.WritableStream, dir: Direction, callback?: () => void): boolean;
+    /**
+     * The `readline.clearScreenDown()` method clears the given [TTY](https://nodejs.org/docs/latest-v25.x/api/tty.html) stream from
+     * the current position of the cursor down.
+     * @since v0.7.7
+     * @param callback Invoked once the operation completes.
+     * @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
+     */
+    function clearScreenDown(stream: NodeJS.WritableStream, callback?: () => void): boolean;
+    /**
+     * The `readline.cursorTo()` method moves cursor to the specified position in a
+     * given [TTY](https://nodejs.org/docs/latest-v25.x/api/tty.html) `stream`.
+     * @since v0.7.7
+     * @param callback Invoked once the operation completes.
+     * @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
+     */
+    function cursorTo(stream: NodeJS.WritableStream, x: number, y?: number, callback?: () => void): boolean;
+    /**
+     * The `readline.moveCursor()` method moves the cursor _relative_ to its current
+     * position in a given [TTY](https://nodejs.org/docs/latest-v25.x/api/tty.html) `stream`.
+     * @since v0.7.7
+     * @param callback Invoked once the operation completes.
+     * @return `false` if `stream` wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
+     */
+    function moveCursor(stream: NodeJS.WritableStream, dx: number, dy: number, callback?: () => void): boolean;
+}
+declare module "node:readline" {
+    export * as promises from "node:readline/promises";
+}
+declare module "readline" {
+    export * from "node:readline";
+}
diff --git a/mqtt-backend/node_modules/@types/node/readline/promises.d.ts b/mqtt-backend/node_modules/@types/node/readline/promises.d.ts
new file mode 100644
index 0000000..ccee490
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/readline/promises.d.ts
@@ -0,0 +1,158 @@
+declare module "node:readline/promises" {
+    import { Abortable } from "node:events";
+    import {
+        CompleterResult,
+        Direction,
+        Interface as _Interface,
+        ReadLineOptions as _ReadLineOptions,
+    } from "node:readline";
+    /**
+     * Instances of the `readlinePromises.Interface` class are constructed using the `readlinePromises.createInterface()` method. Every instance is associated with a
+     * single `input` `Readable` stream and a single `output` `Writable` stream.
+     * The `output` stream is used to print prompts for user input that arrives on,
+     * and is read from, the `input` stream.
+     * @since v17.0.0
+     */
+    class Interface extends _Interface {
+        /**
+         * The `rl.question()` method displays the `query` by writing it to the `output`,
+         * waits for user input to be provided on `input`, then invokes the `callback` function passing the provided input as the first argument.
+         *
+         * When called, `rl.question()` will resume the `input` stream if it has been
+         * paused.
+         *
+         * If the `Interface` was created with `output` set to `null` or `undefined` the `query` is not written.
+         *
+         * If the question is called after `rl.close()`, it returns a rejected promise.
+         *
+         * Example usage:
+         *
+         * ```js
+         * const answer = await rl.question('What is your favorite food? ');
+         * console.log(`Oh, so your favorite food is ${answer}`);
+         * ```
+         *
+         * Using an `AbortSignal` to cancel a question.
+         *
+         * ```js
+         * const signal = AbortSignal.timeout(10_000);
+         *
+         * signal.addEventListener('abort', () => {
+         *   console.log('The food question timed out');
+         * }, { once: true });
+         *
+         * const answer = await rl.question('What is your favorite food? ', { signal });
+         * console.log(`Oh, so your favorite food is ${answer}`);
+         * ```
+         * @since v17.0.0
+         * @param query A statement or query to write to `output`, prepended to the prompt.
+         * @return A promise that is fulfilled with the user's input in response to the `query`.
+         */
+        question(query: string): Promise<string>;
+        question(query: string, options: Abortable): Promise<string>;
+    }
+    /**
+     * @since v17.0.0
+     */
+    class Readline {
+        /**
+         * @param stream A TTY stream.
+         */
+        constructor(
+            stream: NodeJS.WritableStream,
+            options?: {
+                autoCommit?: boolean | undefined;
+            },
+        );
+        /**
+         * The `rl.clearLine()` method adds to the internal list of pending action an
+         * action that clears current line of the associated `stream` in a specified
+         * direction identified by `dir`.
+         * Call `rl.commit()` to see the effect of this method, unless `autoCommit: true` was passed to the constructor.
+         * @since v17.0.0
+         * @return this
+         */
+        clearLine(dir: Direction): this;
+        /**
+         * The `rl.clearScreenDown()` method adds to the internal list of pending action an
+         * action that clears the associated stream from the current position of the
+         * cursor down.
+         * Call `rl.commit()` to see the effect of this method, unless `autoCommit: true` was passed to the constructor.
+         * @since v17.0.0
+         * @return this
+         */
+        clearScreenDown(): this;
+        /**
+         * The `rl.commit()` method sends all the pending actions to the associated `stream` and clears the internal list of pending actions.
+         * @since v17.0.0
+         */
+        commit(): Promise<void>;
+        /**
+         * The `rl.cursorTo()` method adds to the internal list of pending action an action
+         * that moves cursor to the specified position in the associated `stream`.
+         * Call `rl.commit()` to see the effect of this method, unless `autoCommit: true` was passed to the constructor.
+         * @since v17.0.0
+         * @return this
+         */
+        cursorTo(x: number, y?: number): this;
+        /**
+         * The `rl.moveCursor()` method adds to the internal list of pending action an
+         * action that moves the cursor _relative_ to its current position in the
+         * associated `stream`.
+         * Call `rl.commit()` to see the effect of this method, unless `autoCommit: true` was passed to the constructor.
+         * @since v17.0.0
+         * @return this
+         */
+        moveCursor(dx: number, dy: number): this;
+        /**
+         * The `rl.rollback` methods clears the internal list of pending actions without
+         * sending it to the associated `stream`.
+         * @since v17.0.0
+         * @return this
+         */
+        rollback(): this;
+    }
+    type Completer = (line: string) => CompleterResult | Promise<CompleterResult>;
+    interface ReadLineOptions extends Omit<_ReadLineOptions, "completer"> {
+        /**
+         * An optional function used for Tab autocompletion.
+         */
+        completer?: Completer | undefined;
+    }
+    /**
+     * The `readlinePromises.createInterface()` method creates a new `readlinePromises.Interface` instance.
+     *
+     * ```js
+     * import readlinePromises from 'node:readline/promises';
+     * const rl = readlinePromises.createInterface({
+     *   input: process.stdin,
+     *   output: process.stdout,
+     * });
+     * ```
+     *
+     * Once the `readlinePromises.Interface` instance is created, the most common case
+     * is to listen for the `'line'` event:
+     *
+     * ```js
+     * rl.on('line', (line) => {
+     *   console.log(`Received: ${line}`);
+     * });
+     * ```
+     *
+     * If `terminal` is `true` for this instance then the `output` stream will get
+     * the best compatibility if it defines an `output.columns` property and emits
+     * a `'resize'` event on the `output` if or when the columns ever change
+     * (`process.stdout` does this automatically when it is a TTY).
+     * @since v17.0.0
+     */
+    function createInterface(
+        input: NodeJS.ReadableStream,
+        output?: NodeJS.WritableStream,
+        completer?: Completer,
+        terminal?: boolean,
+    ): Interface;
+    function createInterface(options: ReadLineOptions): Interface;
+}
+declare module "readline/promises" {
+    export * from "node:readline/promises";
+}
diff --git a/mqtt-backend/node_modules/@types/node/repl.d.ts b/mqtt-backend/node_modules/@types/node/repl.d.ts
new file mode 100644
index 0000000..7481bea
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/repl.d.ts
@@ -0,0 +1,405 @@
+declare module "node:repl" {
+    import { AsyncCompleter, Completer, Interface, InterfaceEventMap } from "node:readline";
+    import { InspectOptions } from "node:util";
+    import { Context } from "node:vm";
+    interface ReplOptions {
+        /**
+         * The input prompt to display.
+         * @default "> "
+         */
+        prompt?: string | undefined;
+        /**
+         * The `Readable` stream from which REPL input will be read.
+         * @default process.stdin
+         */
+        input?: NodeJS.ReadableStream | undefined;
+        /**
+         * The `Writable` stream to which REPL output will be written.
+         * @default process.stdout
+         */
+        output?: NodeJS.WritableStream | undefined;
+        /**
+         * If `true`, specifies that the output should be treated as a TTY terminal, and have
+         * ANSI/VT100 escape codes written to it.
+         * Default: checking the value of the `isTTY` property on the output stream upon
+         * instantiation.
+         */
+        terminal?: boolean | undefined;
+        /**
+         * The function to be used when evaluating each given line of input.
+         * **Default:** an async wrapper for the JavaScript `eval()` function. An `eval` function can
+         * error with `repl.Recoverable` to indicate the input was incomplete and prompt for
+         * additional lines. See the [custom evaluation functions](https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#custom-evaluation-functions)
+         * section for more details.
+         */
+        eval?: REPLEval | undefined;
+        /**
+         * Defines if the repl prints output previews or not.
+         * @default `true` Always `false` in case `terminal` is falsy.
+         */
+        preview?: boolean | undefined;
+        /**
+         * If `true`, specifies that the default `writer` function should include ANSI color
+         * styling to REPL output. If a custom `writer` function is provided then this has no
+         * effect.
+         * @default the REPL instance's `terminal` value
+         */
+        useColors?: boolean | undefined;
+        /**
+         * If `true`, specifies that the default evaluation function will use the JavaScript
+         * `global` as the context as opposed to creating a new separate context for the REPL
+         * instance. The node CLI REPL sets this value to `true`.
+         * @default false
+         */
+        useGlobal?: boolean | undefined;
+        /**
+         * If `true`, specifies that the default writer will not output the return value of a
+         * command if it evaluates to `undefined`.
+         * @default false
+         */
+        ignoreUndefined?: boolean | undefined;
+        /**
+         * The function to invoke to format the output of each command before writing to `output`.
+         * @default a wrapper for `util.inspect`
+         *
+         * @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_customizing_repl_output
+         */
+        writer?: REPLWriter | undefined;
+        /**
+         * An optional function used for custom Tab auto completion.
+         *
+         * @see https://nodejs.org/dist/latest-v25.x/docs/api/readline.html#readline_use_of_the_completer_function
+         */
+        completer?: Completer | AsyncCompleter | undefined;
+        /**
+         * A flag that specifies whether the default evaluator executes all JavaScript commands in
+         * strict mode or default (sloppy) mode.
+         * Accepted values are:
+         * - `repl.REPL_MODE_SLOPPY` - evaluates expressions in sloppy mode.
+         * - `repl.REPL_MODE_STRICT` - evaluates expressions in strict mode. This is equivalent to
+         *   prefacing every repl statement with `'use strict'`.
+         */
+        replMode?: typeof REPL_MODE_SLOPPY | typeof REPL_MODE_STRICT | undefined;
+        /**
+         * Stop evaluating the current piece of code when `SIGINT` is received, i.e. `Ctrl+C` is
+         * pressed. This cannot be used together with a custom `eval` function.
+         * @default false
+         */
+        breakEvalOnSigint?: boolean | undefined;
+    }
+    type REPLEval = (
+        this: REPLServer,
+        evalCmd: string,
+        context: Context,
+        file: string,
+        cb: (err: Error | null, result: any) => void,
+    ) => void;
+    type REPLWriter = (this: REPLServer, obj: any) => string;
+    /**
+     * This is the default "writer" value, if none is passed in the REPL options,
+     * and it can be overridden by custom print functions.
+     */
+    const writer: REPLWriter & {
+        options: InspectOptions;
+    };
+    type REPLCommandAction = (this: REPLServer, text: string) => void;
+    interface REPLCommand {
+        /**
+         * Help text to be displayed when `.help` is entered.
+         */
+        help?: string | undefined;
+        /**
+         * The function to execute, optionally accepting a single string argument.
+         */
+        action: REPLCommandAction;
+    }
+    interface REPLServerSetupHistoryOptions {
+        filePath?: string | undefined;
+        size?: number | undefined;
+        removeHistoryDuplicates?: boolean | undefined;
+        onHistoryFileLoaded?: ((err: Error | null, repl: REPLServer) => void) | undefined;
+    }
+    interface REPLServerEventMap extends InterfaceEventMap {
+        "exit": [];
+        "reset": [context: Context];
+    }
+    /**
+     * Instances of `repl.REPLServer` are created using the {@link start} method
+     * or directly using the JavaScript `new` keyword.
+     *
+     * ```js
+     * import repl from 'node:repl';
+     *
+     * const options = { useColors: true };
+     *
+     * const firstInstance = repl.start(options);
+     * const secondInstance = new repl.REPLServer(options);
+     * ```
+     * @since v0.1.91
+     */
+    class REPLServer extends Interface {
+        /**
+         * NOTE: According to the documentation:
+         *
+         * > Instances of `repl.REPLServer` are created using the `repl.start()` method and
+         * > _should not_ be created directly using the JavaScript `new` keyword.
+         *
+         * `REPLServer` cannot be subclassed due to implementation specifics in NodeJS.
+         *
+         * @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_class_replserver
+         */
+        private constructor();
+        /**
+         * The `vm.Context` provided to the `eval` function to be used for JavaScript
+         * evaluation.
+         */
+        readonly context: Context;
+        /**
+         * @deprecated since v14.3.0 - Use `input` instead.
+         */
+        readonly inputStream: NodeJS.ReadableStream;
+        /**
+         * @deprecated since v14.3.0 - Use `output` instead.
+         */
+        readonly outputStream: NodeJS.WritableStream;
+        /**
+         * The `Readable` stream from which REPL input will be read.
+         */
+        readonly input: NodeJS.ReadableStream;
+        /**
+         * The `Writable` stream to which REPL output will be written.
+         */
+        readonly output: NodeJS.WritableStream;
+        /**
+         * The commands registered via `replServer.defineCommand()`.
+         */
+        readonly commands: NodeJS.ReadOnlyDict<REPLCommand>;
+        /**
+         * A value indicating whether the REPL is currently in "editor mode".
+         *
+         * @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_commands_and_special_keys
+         */
+        readonly editorMode: boolean;
+        /**
+         * A value indicating whether the `_` variable has been assigned.
+         *
+         * @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
+         */
+        readonly underscoreAssigned: boolean;
+        /**
+         * The last evaluation result from the REPL (assigned to the `_` variable inside of the REPL).
+         *
+         * @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
+         */
+        readonly last: any;
+        /**
+         * A value indicating whether the `_error` variable has been assigned.
+         *
+         * @since v9.8.0
+         * @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
+         */
+        readonly underscoreErrAssigned: boolean;
+        /**
+         * The last error raised inside the REPL (assigned to the `_error` variable inside of the REPL).
+         *
+         * @since v9.8.0
+         * @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_assignment_of_the_underscore_variable
+         */
+        readonly lastError: any;
+        /**
+         * Specified in the REPL options, this is the function to be used when evaluating each
+         * given line of input. If not specified in the REPL options, this is an async wrapper
+         * for the JavaScript `eval()` function.
+         */
+        readonly eval: REPLEval;
+        /**
+         * Specified in the REPL options, this is a value indicating whether the default
+         * `writer` function should include ANSI color styling to REPL output.
+         */
+        readonly useColors: boolean;
+        /**
+         * Specified in the REPL options, this is a value indicating whether the default `eval`
+         * function will use the JavaScript `global` as the context as opposed to creating a new
+         * separate context for the REPL instance.
+         */
+        readonly useGlobal: boolean;
+        /**
+         * Specified in the REPL options, this is a value indicating whether the default `writer`
+         * function should output the result of a command if it evaluates to `undefined`.
+         */
+        readonly ignoreUndefined: boolean;
+        /**
+         * Specified in the REPL options, this is the function to invoke to format the output of
+         * each command before writing to `outputStream`. If not specified in the REPL options,
+         * this will be a wrapper for `util.inspect`.
+         */
+        readonly writer: REPLWriter;
+        /**
+         * Specified in the REPL options, this is the function to use for custom Tab auto-completion.
+         */
+        readonly completer: Completer | AsyncCompleter;
+        /**
+         * Specified in the REPL options, this is a flag that specifies whether the default `eval`
+         * function should execute all JavaScript commands in strict mode or default (sloppy) mode.
+         * Possible values are:
+         * - `repl.REPL_MODE_SLOPPY` - evaluates expressions in sloppy mode.
+         * - `repl.REPL_MODE_STRICT` - evaluates expressions in strict mode. This is equivalent to
+         *    prefacing every repl statement with `'use strict'`.
+         */
+        readonly replMode: typeof REPL_MODE_SLOPPY | typeof REPL_MODE_STRICT;
+        /**
+         * The `replServer.defineCommand()` method is used to add new `.`\-prefixed commands
+         * to the REPL instance. Such commands are invoked by typing a `.` followed by the `keyword`. The `cmd` is either a `Function` or an `Object` with the following
+         * properties:
+         *
+         * The following example shows two new commands added to the REPL instance:
+         *
+         * ```js
+         * import repl from 'node:repl';
+         *
+         * const replServer = repl.start({ prompt: '> ' });
+         * replServer.defineCommand('sayhello', {
+         *   help: 'Say hello',
+         *   action(name) {
+         *     this.clearBufferedCommand();
+         *     console.log(`Hello, ${name}!`);
+         *     this.displayPrompt();
+         *   },
+         * });
+         * replServer.defineCommand('saybye', function saybye() {
+         *   console.log('Goodbye!');
+         *   this.close();
+         * });
+         * ```
+         *
+         * The new commands can then be used from within the REPL instance:
+         *
+         * ```console
+         * > .sayhello Node.js User
+         * Hello, Node.js User!
+         * > .saybye
+         * Goodbye!
+         * ```
+         * @since v0.3.0
+         * @param keyword The command keyword (_without_ a leading `.` character).
+         * @param cmd The function to invoke when the command is processed.
+         */
+        defineCommand(keyword: string, cmd: REPLCommandAction | REPLCommand): void;
+        /**
+         * The `replServer.displayPrompt()` method readies the REPL instance for input
+         * from the user, printing the configured `prompt` to a new line in the `output` and resuming the `input` to accept new input.
+         *
+         * When multi-line input is being entered, a pipe `'|'` is printed rather than the
+         * 'prompt'.
+         *
+         * When `preserveCursor` is `true`, the cursor placement will not be reset to `0`.
+         *
+         * The `replServer.displayPrompt` method is primarily intended to be called from
+         * within the action function for commands registered using the `replServer.defineCommand()` method.
+         * @since v0.1.91
+         */
+        displayPrompt(preserveCursor?: boolean): void;
+        /**
+         * The `replServer.clearBufferedCommand()` method clears any command that has been
+         * buffered but not yet executed. This method is primarily intended to be
+         * called from within the action function for commands registered using the `replServer.defineCommand()` method.
+         * @since v9.0.0
+         */
+        clearBufferedCommand(): void;
+        /**
+         * Initializes a history log file for the REPL instance. When executing the
+         * Node.js binary and using the command-line REPL, a history file is initialized
+         * by default. However, this is not the case when creating a REPL
+         * programmatically. Use this method to initialize a history log file when working
+         * with REPL instances programmatically.
+         * @since v11.10.0
+         * @param historyPath the path to the history file
+         * @param callback called when history writes are ready or upon error
+         */
+        setupHistory(historyPath: string, callback: (err: Error | null, repl: this) => void): void;
+        setupHistory(
+            historyConfig?: REPLServerSetupHistoryOptions,
+            callback?: (err: Error | null, repl: this) => void,
+        ): void;
+        // #region InternalEventEmitter
+        addListener<E extends keyof REPLServerEventMap>(
+            eventName: E,
+            listener: (...args: REPLServerEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof REPLServerEventMap>(eventName: E, ...args: REPLServerEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof REPLServerEventMap>(
+            eventName: E,
+            listener?: (...args: REPLServerEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof REPLServerEventMap>(eventName: E): ((...args: REPLServerEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof REPLServerEventMap>(eventName: E, listener: (...args: REPLServerEventMap[E]) => void): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof REPLServerEventMap>(eventName: E, listener: (...args: REPLServerEventMap[E]) => void): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof REPLServerEventMap>(
+            eventName: E,
+            listener: (...args: REPLServerEventMap[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof REPLServerEventMap>(
+            eventName: E,
+            listener: (...args: REPLServerEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof REPLServerEventMap>(
+            eventName: E,
+            listener: (...args: REPLServerEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof REPLServerEventMap>(eventName: E): ((...args: REPLServerEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof REPLServerEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof REPLServerEventMap>(
+            eventName: E,
+            listener: (...args: REPLServerEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    /**
+     * A flag passed in the REPL options. Evaluates expressions in sloppy mode.
+     */
+    const REPL_MODE_SLOPPY: unique symbol;
+    /**
+     * A flag passed in the REPL options. Evaluates expressions in strict mode.
+     * This is equivalent to prefacing every repl statement with `'use strict'`.
+     */
+    const REPL_MODE_STRICT: unique symbol;
+    /**
+     * The `repl.start()` method creates and starts a {@link REPLServer} instance.
+     *
+     * If `options` is a string, then it specifies the input prompt:
+     *
+     * ```js
+     * import repl from 'node:repl';
+     *
+     * // a Unix style prompt
+     * repl.start('$ ');
+     * ```
+     * @since v0.1.91
+     */
+    function start(options?: string | ReplOptions): REPLServer;
+    /**
+     * Indicates a recoverable error that a `REPLServer` can use to support multi-line input.
+     *
+     * @see https://nodejs.org/dist/latest-v25.x/docs/api/repl.html#repl_recoverable_errors
+     */
+    class Recoverable extends SyntaxError {
+        err: Error;
+        constructor(err: Error);
+    }
+}
+declare module "repl" {
+    export * from "node:repl";
+}
diff --git a/mqtt-backend/node_modules/@types/node/sea.d.ts b/mqtt-backend/node_modules/@types/node/sea.d.ts
new file mode 100644
index 0000000..85ab108
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/sea.d.ts
@@ -0,0 +1,47 @@
+declare module "node:sea" {
+    type AssetKey = string;
+    /**
+     * @since v20.12.0
+     * @return Whether this script is running inside a single-executable application.
+     */
+    function isSea(): boolean;
+    /**
+     * This method can be used to retrieve the assets configured to be bundled into the
+     * single-executable application at build time.
+     * An error is thrown when no matching asset can be found.
+     * @since v20.12.0
+     */
+    function getAsset(key: AssetKey): ArrayBuffer;
+    function getAsset(key: AssetKey, encoding: string): string;
+    /**
+     * Similar to `sea.getAsset()`, but returns the result in a [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob).
+     * An error is thrown when no matching asset can be found.
+     * @since v20.12.0
+     */
+    function getAssetAsBlob(key: AssetKey, options?: {
+        type: string;
+    }): Blob;
+    /**
+     * This method can be used to retrieve the assets configured to be bundled into the
+     * single-executable application at build time.
+     * An error is thrown when no matching asset can be found.
+     *
+     * Unlike `sea.getRawAsset()` or `sea.getAssetAsBlob()`, this method does not
+     * return a copy. Instead, it returns the raw asset bundled inside the executable.
+     *
+     * For now, users should avoid writing to the returned array buffer. If the
+     * injected section is not marked as writable or not aligned properly,
+     * writes to the returned array buffer is likely to result in a crash.
+     * @since v20.12.0
+     */
+    function getRawAsset(key: AssetKey): ArrayBuffer;
+    /**
+     * This method can be used to retrieve an array of all the keys of assets
+     * embedded into the single-executable application.
+     * An error is thrown when not running inside a single-executable application.
+     * @since v24.8.0
+     * @returns An array containing all the keys of the assets
+     * embedded in the executable. If no assets are embedded, returns an empty array.
+     */
+    function getAssetKeys(): string[];
+}
diff --git a/mqtt-backend/node_modules/@types/node/sqlite.d.ts b/mqtt-backend/node_modules/@types/node/sqlite.d.ts
new file mode 100644
index 0000000..d2111bb
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/sqlite.d.ts
@@ -0,0 +1,1021 @@
+declare module "node:sqlite" {
+    import { PathLike } from "node:fs";
+    type SQLInputValue = null | number | bigint | string | NodeJS.ArrayBufferView;
+    type SQLOutputValue = null | number | bigint | string | NodeJS.NonSharedUint8Array;
+    interface DatabaseSyncOptions {
+        /**
+         * If `true`, the database is opened by the constructor. When
+         * this value is `false`, the database must be opened via the `open()` method.
+         * @since v22.5.0
+         * @default true
+         */
+        open?: boolean | undefined;
+        /**
+         * If `true`, foreign key constraints
+         * are enabled. This is recommended but can be disabled for compatibility with
+         * legacy database schemas. The enforcement of foreign key constraints can be
+         * enabled and disabled after opening the database using
+         * [`PRAGMA foreign_keys`](https://www.sqlite.org/pragma.html#pragma_foreign_keys).
+         * @since v22.10.0
+         * @default true
+         */
+        enableForeignKeyConstraints?: boolean | undefined;
+        /**
+         * If `true`, SQLite will accept
+         * [double-quoted string literals](https://www.sqlite.org/quirks.html#dblquote).
+         * This is not recommended but can be
+         * enabled for compatibility with legacy database schemas.
+         * @since v22.10.0
+         * @default false
+         */
+        enableDoubleQuotedStringLiterals?: boolean | undefined;
+        /**
+         * If `true`, the database is opened in read-only mode.
+         * If the database does not exist, opening it will fail.
+         * @since v22.12.0
+         * @default false
+         */
+        readOnly?: boolean | undefined;
+        /**
+         * If `true`, the `loadExtension` SQL function
+         * and the `loadExtension()` method are enabled.
+         * You can call `enableLoadExtension(false)` later to disable this feature.
+         * @since v22.13.0
+         * @default false
+         */
+        allowExtension?: boolean | undefined;
+        /**
+         * The [busy timeout](https://sqlite.org/c3ref/busy_timeout.html) in milliseconds. This is the maximum amount of
+         * time that SQLite will wait for a database lock to be released before
+         * returning an error.
+         * @since v24.0.0
+         * @default 0
+         */
+        timeout?: number | undefined;
+        /**
+         * If `true`, integer fields are read as JavaScript `BigInt` values. If `false`,
+         * integer fields are read as JavaScript numbers.
+         * @since v24.4.0
+         * @default false
+         */
+        readBigInts?: boolean | undefined;
+        /**
+         * If `true`, query results are returned as arrays instead of objects.
+         * @since v24.4.0
+         * @default false
+         */
+        returnArrays?: boolean | undefined;
+        /**
+         * If `true`, allows binding named parameters without the prefix
+         * character (e.g., `foo` instead of `:foo`).
+         * @since v24.4.40
+         * @default true
+         */
+        allowBareNamedParameters?: boolean | undefined;
+        /**
+         * If `true`, unknown named parameters are ignored when binding.
+         * If `false`, an exception is thrown for unknown named parameters.
+         * @since v24.4.40
+         * @default false
+         */
+        allowUnknownNamedParameters?: boolean | undefined;
+        /**
+         * If `true`, enables the defensive flag. When the defensive flag is enabled,
+         * language features that allow ordinary SQL to deliberately corrupt the database file are disabled.
+         * The defensive flag can also be set using `enableDefensive()`.
+         * @since v25.1.0
+         * @default true
+         */
+        defensive?: boolean | undefined;
+    }
+    interface CreateSessionOptions {
+        /**
+         * A specific table to track changes for. By default, changes to all tables are tracked.
+         * @since v22.12.0
+         */
+        table?: string | undefined;
+        /**
+         * Name of the database to track. This is useful when multiple databases have been added using
+         * [`ATTACH DATABASE`](https://www.sqlite.org/lang_attach.html).
+         * @since v22.12.0
+         * @default 'main'
+         */
+        db?: string | undefined;
+    }
+    interface ApplyChangesetOptions {
+        /**
+         * Skip changes that, when targeted table name is supplied to this function, return a truthy value.
+         * By default, all changes are attempted.
+         * @since v22.12.0
+         */
+        filter?: ((tableName: string) => boolean) | undefined;
+        /**
+         * A function that determines how to handle conflicts. The function receives one argument,
+         * which can be one of the following values:
+         *
+         * * `SQLITE_CHANGESET_DATA`: A `DELETE` or `UPDATE` change does not contain the expected "before" values.
+         * * `SQLITE_CHANGESET_NOTFOUND`: A row matching the primary key of the `DELETE` or `UPDATE` change does not exist.
+         * * `SQLITE_CHANGESET_CONFLICT`: An `INSERT` change results in a duplicate primary key.
+         * * `SQLITE_CHANGESET_FOREIGN_KEY`: Applying a change would result in a foreign key violation.
+         * * `SQLITE_CHANGESET_CONSTRAINT`: Applying a change results in a `UNIQUE`, `CHECK`, or `NOT NULL` constraint
+         * violation.
+         *
+         * The function should return one of the following values:
+         *
+         * * `SQLITE_CHANGESET_OMIT`: Omit conflicting changes.
+         * * `SQLITE_CHANGESET_REPLACE`: Replace existing values with conflicting changes (only valid with
+             `SQLITE_CHANGESET_DATA` or `SQLITE_CHANGESET_CONFLICT` conflicts).
+         * * `SQLITE_CHANGESET_ABORT`: Abort on conflict and roll back the database.
+         *
+         * When an error is thrown in the conflict handler or when any other value is returned from the handler,
+         * applying the changeset is aborted and the database is rolled back.
+         *
+         * **Default**: A function that returns `SQLITE_CHANGESET_ABORT`.
+         * @since v22.12.0
+         */
+        onConflict?: ((conflictType: number) => number) | undefined;
+    }
+    interface FunctionOptions {
+        /**
+         * If `true`, the [`SQLITE_DETERMINISTIC`](https://www.sqlite.org/c3ref/c_deterministic.html) flag is
+         * set on the created function.
+         * @default false
+         */
+        deterministic?: boolean | undefined;
+        /**
+         * If `true`, the [`SQLITE_DIRECTONLY`](https://www.sqlite.org/c3ref/c_directonly.html) flag is set on
+         * the created function.
+         * @default false
+         */
+        directOnly?: boolean | undefined;
+        /**
+         * If `true`, integer arguments to `function`
+         * are converted to `BigInt`s. If `false`, integer arguments are passed as
+         * JavaScript numbers.
+         * @default false
+         */
+        useBigIntArguments?: boolean | undefined;
+        /**
+         * If `true`, `function` may be invoked with any number of
+         * arguments (between zero and
+         * [`SQLITE_MAX_FUNCTION_ARG`](https://www.sqlite.org/limits.html#max_function_arg)). If `false`,
+         * `function` must be invoked with exactly `function.length` arguments.
+         * @default false
+         */
+        varargs?: boolean | undefined;
+    }
+    interface AggregateOptions<T extends SQLInputValue = SQLInputValue> extends FunctionOptions {
+        /**
+         * The identity value for the aggregation function. This value is used when the aggregation
+         * function is initialized. When a `Function` is passed the identity will be its return value.
+         */
+        start: T | (() => T);
+        /**
+         * The function to call for each row in the aggregation. The
+         * function receives the current state and the row value. The return value of
+         * this function should be the new state.
+         */
+        step: (accumulator: T, ...args: SQLOutputValue[]) => T;
+        /**
+         * The function to call to get the result of the
+         * aggregation. The function receives the final state and should return the
+         * result of the aggregation.
+         */
+        result?: ((accumulator: T) => SQLInputValue) | undefined;
+        /**
+         * When this function is provided, the `aggregate` method will work as a window function.
+         * The function receives the current state and the dropped row value. The return value of this function should be the
+         * new state.
+         */
+        inverse?: ((accumulator: T, ...args: SQLOutputValue[]) => T) | undefined;
+    }
+    interface PrepareOptions {
+        /**
+         * If `true`, integer fields are read as `BigInt`s.
+         * @since v25.5.0
+         */
+        readBigInts?: boolean | undefined;
+        /**
+         * If `true`, results are returned as arrays.
+         * @since v25.5.0
+         */
+        returnArrays?: boolean | undefined;
+        /**
+         * If `true`, allows binding named parameters without the prefix character.
+         * @since v25.5.0
+         */
+        allowBareNamedParameters?: boolean | undefined;
+        /**
+         * If `true`, unknown named parameters are ignored.
+         * @since v25.5.0
+         */
+        allowUnknownNamedParameters?: boolean | undefined;
+    }
+    /**
+     * This class represents a single [connection](https://www.sqlite.org/c3ref/sqlite3.html) to a SQLite database. All APIs
+     * exposed by this class execute synchronously.
+     * @since v22.5.0
+     */
+    class DatabaseSync implements Disposable {
+        /**
+         * Constructs a new `DatabaseSync` instance.
+         * @param path The path of the database.
+         * A SQLite database can be stored in a file or completely [in memory](https://www.sqlite.org/inmemorydb.html).
+         * To use a file-backed database, the path should be a file path.
+         * To use an in-memory database, the path should be the special name `':memory:'`.
+         * @param options Configuration options for the database connection.
+         */
+        constructor(path: PathLike, options?: DatabaseSyncOptions);
+        /**
+         * Registers a new aggregate function with the SQLite database. This method is a wrapper around
+         * [`sqlite3_create_window_function()`](https://www.sqlite.org/c3ref/create_function.html).
+         *
+         * When used as a window function, the `result` function will be called multiple times.
+         *
+         * ```js
+         * import { DatabaseSync } from 'node:sqlite';
+         *
+         * const db = new DatabaseSync(':memory:');
+         * db.exec(`
+         *   CREATE TABLE t3(x, y);
+         *   INSERT INTO t3 VALUES ('a', 4),
+         *                         ('b', 5),
+         *                         ('c', 3),
+         *                         ('d', 8),
+         *                         ('e', 1);
+         * `);
+         *
+         * db.aggregate('sumint', {
+         *   start: 0,
+         *   step: (acc, value) => acc + value,
+         * });
+         *
+         * db.prepare('SELECT sumint(y) as total FROM t3').get(); // { total: 21 }
+         * ```
+         * @since v24.0.0
+         * @param name The name of the SQLite function to create.
+         * @param options Function configuration settings.
+         */
+        aggregate(name: string, options: AggregateOptions): void;
+        aggregate<T extends SQLInputValue>(name: string, options: AggregateOptions<T>): void;
+        /**
+         * Closes the database connection. An exception is thrown if the database is not
+         * open. This method is a wrapper around [`sqlite3_close_v2()`](https://www.sqlite.org/c3ref/close.html).
+         * @since v22.5.0
+         */
+        close(): void;
+        /**
+         * Loads a shared library into the database connection. This method is a wrapper
+         * around [`sqlite3_load_extension()`](https://www.sqlite.org/c3ref/load_extension.html). It is required to enable the
+         * `allowExtension` option when constructing the `DatabaseSync` instance.
+         * @since v22.13.0
+         * @param path The path to the shared library to load.
+         */
+        loadExtension(path: string): void;
+        /**
+         * Enables or disables the `loadExtension` SQL function, and the `loadExtension()`
+         * method. When `allowExtension` is `false` when constructing, you cannot enable
+         * loading extensions for security reasons.
+         * @since v22.13.0
+         * @param allow Whether to allow loading extensions.
+         */
+        enableLoadExtension(allow: boolean): void;
+        /**
+         * Enables or disables the defensive flag. When the defensive flag is active,
+         * language features that allow ordinary SQL to deliberately corrupt the database file are disabled.
+         * See [`SQLITE_DBCONFIG_DEFENSIVE`](https://www.sqlite.org/c3ref/c_dbconfig_defensive.html#sqlitedbconfigdefensive) in the SQLite documentation for details.
+         * @since v25.1.0
+         * @param active Whether to set the defensive flag.
+         */
+        enableDefensive(active: boolean): void;
+        /**
+         * This method is a wrapper around [`sqlite3_db_filename()`](https://sqlite.org/c3ref/db_filename.html)
+         * @since v24.0.0
+         * @param dbName Name of the database. This can be `'main'` (the default primary database) or any other
+         * database that has been added with [`ATTACH DATABASE`](https://www.sqlite.org/lang_attach.html) **Default:** `'main'`.
+         * @returns The location of the database file. When using an in-memory database,
+         * this method returns null.
+         */
+        location(dbName?: string): string | null;
+        /**
+         * This method allows one or more SQL statements to be executed without returning
+         * any results. This method is useful when executing SQL statements read from a
+         * file. This method is a wrapper around [`sqlite3_exec()`](https://www.sqlite.org/c3ref/exec.html).
+         * @since v22.5.0
+         * @param sql A SQL string to execute.
+         */
+        exec(sql: string): void;
+        /**
+         * This method is used to create SQLite user-defined functions. This method is a
+         * wrapper around [`sqlite3_create_function_v2()`](https://www.sqlite.org/c3ref/create_function.html).
+         * @since v22.13.0
+         * @param name The name of the SQLite function to create.
+         * @param options Optional configuration settings for the function.
+         * @param func The JavaScript function to call when the SQLite
+         * function is invoked. The return value of this function should be a valid
+         * SQLite data type: see
+         * [Type conversion between JavaScript and SQLite](https://nodejs.org/docs/latest-v25.x/api/sqlite.html#type-conversion-between-javascript-and-sqlite).
+         * The result defaults to `NULL` if the return value is `undefined`.
+         */
+        function(
+            name: string,
+            options: FunctionOptions,
+            func: (...args: SQLOutputValue[]) => SQLInputValue,
+        ): void;
+        function(name: string, func: (...args: SQLOutputValue[]) => SQLInputValue): void;
+        /**
+         * Sets an authorizer callback that SQLite will invoke whenever it attempts to
+         * access data or modify the database schema through prepared statements.
+         * This can be used to implement security policies, audit access, or restrict certain operations.
+         * This method is a wrapper around [`sqlite3_set_authorizer()`](https://sqlite.org/c3ref/set_authorizer.html).
+         *
+         * When invoked, the callback receives five arguments:
+         *
+         * * `actionCode` {number} The type of operation being performed (e.g.,
+         *   `SQLITE_INSERT`, `SQLITE_UPDATE`, `SQLITE_SELECT`).
+         * * `arg1` {string|null} The first argument (context-dependent, often a table name).
+         * * `arg2` {string|null} The second argument (context-dependent, often a column name).
+         * * `dbName` {string|null} The name of the database.
+         * * `triggerOrView` {string|null} The name of the trigger or view causing the access.
+         *
+         * The callback must return one of the following constants:
+         *
+         * * `SQLITE_OK` - Allow the operation.
+         * * `SQLITE_DENY` - Deny the operation (causes an error).
+         * * `SQLITE_IGNORE` - Ignore the operation (silently skip).
+         *
+         * ```js
+         * import { DatabaseSync, constants } from 'node:sqlite';
+         * const db = new DatabaseSync(':memory:');
+         *
+         * // Set up an authorizer that denies all table creation
+         * db.setAuthorizer((actionCode) => {
+         *   if (actionCode === constants.SQLITE_CREATE_TABLE) {
+         *     return constants.SQLITE_DENY;
+         *   }
+         *   return constants.SQLITE_OK;
+         * });
+         *
+         * // This will work
+         * db.prepare('SELECT 1').get();
+         *
+         * // This will throw an error due to authorization denial
+         * try {
+         *   db.exec('CREATE TABLE blocked (id INTEGER)');
+         * } catch (err) {
+         *   console.log('Operation blocked:', err.message);
+         * }
+         * ```
+         * @since v24.10.0
+         * @param callback The authorizer function to set, or `null` to
+         * clear the current authorizer.
+         */
+        setAuthorizer(
+            callback:
+                | ((
+                    actionCode: number,
+                    arg1: string | null,
+                    arg2: string | null,
+                    dbName: string | null,
+                    triggerOrView: string | null,
+                ) => number)
+                | null,
+        ): void;
+        /**
+         * Whether the database is currently open or not.
+         * @since v22.15.0
+         */
+        readonly isOpen: boolean;
+        /**
+         * Whether the database is currently within a transaction. This method
+         * is a wrapper around [`sqlite3_get_autocommit()`](https://sqlite.org/c3ref/get_autocommit.html).
+         * @since v24.0.0
+         */
+        readonly isTransaction: boolean;
+        /**
+         * Opens the database specified in the `path` argument of the `DatabaseSync`constructor. This method should only be used when the database is not opened via
+         * the constructor. An exception is thrown if the database is already open.
+         * @since v22.5.0
+         */
+        open(): void;
+        /**
+         * Compiles a SQL statement into a [prepared statement](https://www.sqlite.org/c3ref/stmt.html). This method is a wrapper
+         * around [`sqlite3_prepare_v2()`](https://www.sqlite.org/c3ref/prepare.html).
+         * @since v22.5.0
+         * @param sql A SQL string to compile to a prepared statement.
+         * @param options Optional configuration for the prepared statement.
+         * @return The prepared statement.
+         */
+        prepare(sql: string, options?: PrepareOptions): StatementSync;
+        /**
+         * Creates a new {@link SQLTagStore}, which is a Least Recently Used (LRU) cache
+         * for storing prepared statements. This allows for the efficient reuse of
+         * prepared statements by tagging them with a unique identifier.
+         *
+         * When a tagged SQL literal is executed, the `SQLTagStore` checks if a prepared
+         * statement for the corresponding SQL query string already exists in the cache.
+         * If it does, the cached statement is used. If not, a new prepared statement is
+         * created, executed, and then stored in the cache for future use. This mechanism
+         * helps to avoid the overhead of repeatedly parsing and preparing the same SQL
+         * statements.
+         *
+         * Tagged statements bind the placeholder values from the template literal as
+         * parameters to the underlying prepared statement. For example:
+         *
+         * ```js
+         * sqlTagStore.get`SELECT ${value}`;
+         * ```
+         *
+         * is equivalent to:
+         *
+         * ```js
+         * db.prepare('SELECT ?').get(value);
+         * ```
+         *
+         * However, in the first example, the tag store will cache the underlying prepared
+         * statement for future use.
+         *
+         * > **Note:** The `${value}` syntax in tagged statements _binds_ a parameter to
+         * > the prepared statement. This differs from its behavior in _untagged_ template
+         * > literals, where it performs string interpolation.
+         * >
+         * > ```js
+         * > // This a safe example of binding a parameter to a tagged statement.
+         * > sqlTagStore.run`INSERT INTO t1 (id) VALUES (${id})`;
+         * >
+         * > // This is an *unsafe* example of an untagged template string.
+         * > // `id` is interpolated into the query text as a string.
+         * > // This can lead to SQL injection and data corruption.
+         * > db.run(`INSERT INTO t1 (id) VALUES (${id})`);
+         * > ```
+         *
+         * The tag store will match a statement from the cache if the query strings
+         * (including the positions of any bound placeholders) are identical.
+         *
+         * ```js
+         * // The following statements will match in the cache:
+         * sqlTagStore.get`SELECT * FROM t1 WHERE id = ${id} AND active = 1`;
+         * sqlTagStore.get`SELECT * FROM t1 WHERE id = ${12345} AND active = 1`;
+         *
+         * // The following statements will not match, as the query strings
+         * // and bound placeholders differ:
+         * sqlTagStore.get`SELECT * FROM t1 WHERE id = ${id} AND active = 1`;
+         * sqlTagStore.get`SELECT * FROM t1 WHERE id = 12345 AND active = 1`;
+         *
+         * // The following statements will not match, as matches are case-sensitive:
+         * sqlTagStore.get`SELECT * FROM t1 WHERE id = ${id} AND active = 1`;
+         * sqlTagStore.get`select * from t1 where id = ${id} and active = 1`;
+         * ```
+         *
+         * The only way of binding parameters in tagged statements is with the `${value}`
+         * syntax. Do not add parameter binding placeholders (`?` etc.) to the SQL query
+         * string itself.
+         *
+         * ```js
+         * import { DatabaseSync } from 'node:sqlite';
+         *
+         * const db = new DatabaseSync(':memory:');
+         * const sql = db.createSQLTagStore();
+         *
+         * db.exec('CREATE TABLE users (id INT, name TEXT)');
+         *
+         * // Using the 'run' method to insert data.
+         * // The tagged literal is used to identify the prepared statement.
+         * sql.run`INSERT INTO users VALUES (1, 'Alice')`;
+         * sql.run`INSERT INTO users VALUES (2, 'Bob')`;
+         *
+         * // Using the 'get' method to retrieve a single row.
+         * const name = 'Alice';
+         * const user = sql.get`SELECT * FROM users WHERE name = ${name}`;
+         * console.log(user); // { id: 1, name: 'Alice' }
+         *
+         * // Using the 'all' method to retrieve all rows.
+         * const allUsers = sql.all`SELECT * FROM users ORDER BY id`;
+         * console.log(allUsers);
+         * // [
+         * //   { id: 1, name: 'Alice' },
+         * //   { id: 2, name: 'Bob' }
+         * // ]
+         * ```
+         * @since v24.9.0
+         * @returns A new SQL tag store for caching prepared statements.
+         */
+        createTagStore(maxSize?: number): SQLTagStore;
+        /**
+         * Creates and attaches a session to the database. This method is a wrapper around
+         * [`sqlite3session_create()`](https://www.sqlite.org/session/sqlite3session_create.html) and
+         * [`sqlite3session_attach()`](https://www.sqlite.org/session/sqlite3session_attach.html).
+         * @param options The configuration options for the session.
+         * @returns A session handle.
+         * @since v22.12.0
+         */
+        createSession(options?: CreateSessionOptions): Session;
+        /**
+         * An exception is thrown if the database is not
+         * open. This method is a wrapper around
+         * [`sqlite3changeset_apply()`](https://www.sqlite.org/session/sqlite3changeset_apply.html).
+         *
+         * ```js
+         * import { DatabaseSync } from 'node:sqlite';
+         *
+         * const sourceDb = new DatabaseSync(':memory:');
+         * const targetDb = new DatabaseSync(':memory:');
+         *
+         * sourceDb.exec('CREATE TABLE data(key INTEGER PRIMARY KEY, value TEXT)');
+         * targetDb.exec('CREATE TABLE data(key INTEGER PRIMARY KEY, value TEXT)');
+         *
+         * const session = sourceDb.createSession();
+         *
+         * const insert = sourceDb.prepare('INSERT INTO data (key, value) VALUES (?, ?)');
+         * insert.run(1, 'hello');
+         * insert.run(2, 'world');
+         *
+         * const changeset = session.changeset();
+         * targetDb.applyChangeset(changeset);
+         * // Now that the changeset has been applied, targetDb contains the same data as sourceDb.
+         * ```
+         * @param changeset A binary changeset or patchset.
+         * @param options The configuration options for how the changes will be applied.
+         * @returns Whether the changeset was applied successfully without being aborted.
+         * @since v22.12.0
+         */
+        applyChangeset(changeset: Uint8Array, options?: ApplyChangesetOptions): boolean;
+        /**
+         * Closes the database connection. If the database connection is already closed
+         * then this is a no-op.
+         * @since v22.15.0
+         */
+        [Symbol.dispose](): void;
+    }
+    /**
+     * @since v22.12.0
+     */
+    interface Session {
+        /**
+         * Retrieves a changeset containing all changes since the changeset was created. Can be called multiple times.
+         * An exception is thrown if the database or the session is not open. This method is a wrapper around
+         * [`sqlite3session_changeset()`](https://www.sqlite.org/session/sqlite3session_changeset.html).
+         * @returns Binary changeset that can be applied to other databases.
+         * @since v22.12.0
+         */
+        changeset(): NodeJS.NonSharedUint8Array;
+        /**
+         * Similar to the method above, but generates a more compact patchset. See
+         * [Changesets and Patchsets](https://www.sqlite.org/sessionintro.html#changesets_and_patchsets)
+         * in the documentation of SQLite. An exception is thrown if the database or the session is not open. This method is a
+         * wrapper around
+         * [`sqlite3session_patchset()`](https://www.sqlite.org/session/sqlite3session_patchset.html).
+         * @returns Binary patchset that can be applied to other databases.
+         * @since v22.12.0
+         */
+        patchset(): NodeJS.NonSharedUint8Array;
+        /**
+         * Closes the session. An exception is thrown if the database or the session is not open. This method is a
+         * wrapper around
+         * [`sqlite3session_delete()`](https://www.sqlite.org/session/sqlite3session_delete.html).
+         */
+        close(): void;
+        /**
+         * Closes the session. If the session is already closed, does nothing.
+         * @since v24.9.0
+         */
+        [Symbol.dispose](): void;
+    }
+    /**
+     * This class represents a single LRU (Least Recently Used) cache for storing
+     * prepared statements.
+     *
+     * Instances of this class are created via the `database.createTagStore()`
+     * method, not by using a constructor. The store caches prepared statements based
+     * on the provided SQL query string. When the same query is seen again, the store
+     * retrieves the cached statement and safely applies the new values through
+     * parameter binding, thereby preventing attacks like SQL injection.
+     *
+     * The cache has a maxSize that defaults to 1000 statements, but a custom size can
+     * be provided (e.g., `database.createTagStore(100)`). All APIs exposed by this
+     * class execute synchronously.
+     * @since v24.9.0
+     */
+    interface SQLTagStore {
+        /**
+         * Executes the given SQL query and returns all resulting rows as an array of
+         * objects.
+         *
+         * This function is intended to be used as a template literal tag, not to be
+         * called directly.
+         * @since v24.9.0
+         * @param stringElements Template literal elements containing the SQL
+         * query.
+         * @param boundParameters Parameter values to be bound to placeholders in the template string.
+         * @returns An array of objects representing the rows returned by the query.
+         */
+        all(
+            stringElements: TemplateStringsArray,
+            ...boundParameters: SQLInputValue[]
+        ): Record<string, SQLOutputValue>[];
+        /**
+         * Executes the given SQL query and returns the first resulting row as an object.
+         *
+         * This function is intended to be used as a template literal tag, not to be
+         * called directly.
+         * @since v24.9.0
+         * @param stringElements Template literal elements containing the SQL
+         * query.
+         * @param boundParameters Parameter values to be bound to placeholders in the template string.
+         * @returns An object representing the first row returned by
+         * the query, or `undefined` if no rows are returned.
+         */
+        get(
+            stringElements: TemplateStringsArray,
+            ...boundParameters: SQLInputValue[]
+        ): Record<string, SQLOutputValue> | undefined;
+        /**
+         * Executes the given SQL query and returns an iterator over the resulting rows.
+         *
+         * This function is intended to be used as a template literal tag, not to be
+         * called directly.
+         * @since v24.9.0
+         * @param stringElements Template literal elements containing the SQL
+         * query.
+         * @param boundParameters Parameter values to be bound to placeholders in the template string.
+         * @returns An iterator that yields objects representing the rows returned by the query.
+         */
+        iterate(
+            stringElements: TemplateStringsArray,
+            ...boundParameters: SQLInputValue[]
+        ): NodeJS.Iterator<Record<string, SQLOutputValue>>;
+        /**
+         * Executes the given SQL query, which is expected to not return any rows (e.g., INSERT, UPDATE, DELETE).
+         *
+         * This function is intended to be used as a template literal tag, not to be
+         * called directly.
+         * @since v24.9.0
+         * @param stringElements Template literal elements containing the SQL
+         * query.
+         * @param boundParameters Parameter values to be bound to placeholders in the template string.
+         * @returns An object containing information about the execution, including `changes` and `lastInsertRowid`.
+         */
+        run(stringElements: TemplateStringsArray, ...boundParameters: SQLInputValue[]): StatementResultingChanges;
+        /**
+         * A read-only property that returns the number of prepared statements currently in the cache.
+         * @since v24.9.0
+         */
+        readonly size: number;
+        /**
+         * A read-only property that returns the maximum number of prepared statements the cache can hold.
+         * @since v24.9.0
+         */
+        readonly capacity: number;
+        /**
+         * A read-only property that returns the `DatabaseSync` object associated with this `SQLTagStore`.
+         * @since v24.9.0
+         */
+        readonly db: DatabaseSync;
+        /**
+         * Resets the LRU cache, clearing all stored prepared statements.
+         * @since v24.9.0
+         */
+        clear(): void;
+    }
+    interface StatementColumnMetadata {
+        /**
+         * The unaliased name of the column in the origin
+         * table, or `null` if the column is the result of an expression or subquery.
+         * This property is the result of [`sqlite3_column_origin_name()`](https://www.sqlite.org/c3ref/column_database_name.html).
+         */
+        column: string | null;
+        /**
+         * The unaliased name of the origin database, or
+         * `null` if the column is the result of an expression or subquery. This
+         * property is the result of [`sqlite3_column_database_name()`](https://www.sqlite.org/c3ref/column_database_name.html).
+         */
+        database: string | null;
+        /**
+         * The name assigned to the column in the result set of a
+         * `SELECT` statement. This property is the result of
+         * [`sqlite3_column_name()`](https://www.sqlite.org/c3ref/column_name.html).
+         */
+        name: string;
+        /**
+         * The unaliased name of the origin table, or `null` if
+         * the column is the result of an expression or subquery. This property is the
+         * result of [`sqlite3_column_table_name()`](https://www.sqlite.org/c3ref/column_database_name.html).
+         */
+        table: string | null;
+        /**
+         * The declared data type of the column, or `null` if the
+         * column is the result of an expression or subquery. This property is the
+         * result of [`sqlite3_column_decltype()`](https://www.sqlite.org/c3ref/column_decltype.html).
+         */
+        type: string | null;
+    }
+    interface StatementResultingChanges {
+        /**
+         * The number of rows modified, inserted, or deleted by the most recently completed `INSERT`, `UPDATE`, or `DELETE` statement.
+         * This field is either a number or a `BigInt` depending on the prepared statement's configuration.
+         * This property is the result of [`sqlite3_changes64()`](https://www.sqlite.org/c3ref/changes.html).
+         */
+        changes: number | bigint;
+        /**
+         * The most recently inserted rowid.
+         * This field is either a number or a `BigInt` depending on the prepared statement's configuration.
+         * This property is the result of [`sqlite3_last_insert_rowid()`](https://www.sqlite.org/c3ref/last_insert_rowid.html).
+         */
+        lastInsertRowid: number | bigint;
+    }
+    /**
+     * This class represents a single [prepared statement](https://www.sqlite.org/c3ref/stmt.html). This class cannot be
+     * instantiated via its constructor. Instead, instances are created via the`database.prepare()` method. All APIs exposed by this class execute
+     * synchronously.
+     *
+     * A prepared statement is an efficient binary representation of the SQL used to
+     * create it. Prepared statements are parameterizable, and can be invoked multiple
+     * times with different bound values. Parameters also offer protection against [SQL injection](https://en.wikipedia.org/wiki/SQL_injection) attacks. For these reasons, prepared statements are
+     * preferred
+     * over hand-crafted SQL strings when handling user input.
+     * @since v22.5.0
+     */
+    class StatementSync {
+        private constructor();
+        /**
+         * This method executes a prepared statement and returns all results as an array of
+         * objects. If the prepared statement does not return any results, this method
+         * returns an empty array. The prepared statement [parameters are bound](https://www.sqlite.org/c3ref/bind_blob.html) using
+         * the values in `namedParameters` and `anonymousParameters`.
+         * @since v22.5.0
+         * @param namedParameters An optional object used to bind named parameters. The keys of this object are used to configure the mapping.
+         * @param anonymousParameters Zero or more values to bind to anonymous parameters.
+         * @return An array of objects. Each object corresponds to a row returned by executing the prepared statement. The keys and values of each object correspond to the column names and values of
+         * the row.
+         */
+        all(...anonymousParameters: SQLInputValue[]): Record<string, SQLOutputValue>[];
+        all(
+            namedParameters: Record<string, SQLInputValue>,
+            ...anonymousParameters: SQLInputValue[]
+        ): Record<string, SQLOutputValue>[];
+        /**
+         * This method is used to retrieve information about the columns returned by the
+         * prepared statement.
+         * @since v23.11.0
+         * @returns An array of objects. Each object corresponds to a column
+         * in the prepared statement, and contains the following properties:
+         */
+        columns(): StatementColumnMetadata[];
+        /**
+         * The source SQL text of the prepared statement with parameter
+         * placeholders replaced by the values that were used during the most recent
+         * execution of this prepared statement. This property is a wrapper around
+         * [`sqlite3_expanded_sql()`](https://www.sqlite.org/c3ref/expanded_sql.html).
+         * @since v22.5.0
+         */
+        readonly expandedSQL: string;
+        /**
+         * This method executes a prepared statement and returns the first result as an
+         * object. If the prepared statement does not return any results, this method
+         * returns `undefined`. The prepared statement [parameters are bound](https://www.sqlite.org/c3ref/bind_blob.html) using the
+         * values in `namedParameters` and `anonymousParameters`.
+         * @since v22.5.0
+         * @param namedParameters An optional object used to bind named parameters. The keys of this object are used to configure the mapping.
+         * @param anonymousParameters Zero or more values to bind to anonymous parameters.
+         * @return An object corresponding to the first row returned by executing the prepared statement. The keys and values of the object correspond to the column names and values of the row. If no
+         * rows were returned from the database then this method returns `undefined`.
+         */
+        get(...anonymousParameters: SQLInputValue[]): Record<string, SQLOutputValue> | undefined;
+        get(
+            namedParameters: Record<string, SQLInputValue>,
+            ...anonymousParameters: SQLInputValue[]
+        ): Record<string, SQLOutputValue> | undefined;
+        /**
+         * This method executes a prepared statement and returns an iterator of
+         * objects. If the prepared statement does not return any results, this method
+         * returns an empty iterator. The prepared statement [parameters are bound](https://www.sqlite.org/c3ref/bind_blob.html) using
+         * the values in `namedParameters` and `anonymousParameters`.
+         * @since v22.13.0
+         * @param namedParameters An optional object used to bind named parameters.
+         * The keys of this object are used to configure the mapping.
+         * @param anonymousParameters Zero or more values to bind to anonymous parameters.
+         * @returns An iterable iterator of objects. Each object corresponds to a row
+         * returned by executing the prepared statement. The keys and values of each
+         * object correspond to the column names and values of the row.
+         */
+        iterate(...anonymousParameters: SQLInputValue[]): NodeJS.Iterator<Record<string, SQLOutputValue>>;
+        iterate(
+            namedParameters: Record<string, SQLInputValue>,
+            ...anonymousParameters: SQLInputValue[]
+        ): NodeJS.Iterator<Record<string, SQLOutputValue>>;
+        /**
+         * This method executes a prepared statement and returns an object summarizing the
+         * resulting changes. The prepared statement [parameters are bound](https://www.sqlite.org/c3ref/bind_blob.html) using the
+         * values in `namedParameters` and `anonymousParameters`.
+         * @since v22.5.0
+         * @param namedParameters An optional object used to bind named parameters. The keys of this object are used to configure the mapping.
+         * @param anonymousParameters Zero or more values to bind to anonymous parameters.
+         */
+        run(...anonymousParameters: SQLInputValue[]): StatementResultingChanges;
+        run(
+            namedParameters: Record<string, SQLInputValue>,
+            ...anonymousParameters: SQLInputValue[]
+        ): StatementResultingChanges;
+        /**
+         * The names of SQLite parameters begin with a prefix character. By default,`node:sqlite` requires that this prefix character is present when binding
+         * parameters. However, with the exception of dollar sign character, these
+         * prefix characters also require extra quoting when used in object keys.
+         *
+         * To improve ergonomics, this method can be used to also allow bare named
+         * parameters, which do not require the prefix character in JavaScript code. There
+         * are several caveats to be aware of when enabling bare named parameters:
+         *
+         * * The prefix character is still required in SQL.
+         * * The prefix character is still allowed in JavaScript. In fact, prefixed names
+         * will have slightly better binding performance.
+         * * Using ambiguous named parameters, such as `$k` and `@k`, in the same prepared
+         * statement will result in an exception as it cannot be determined how to bind
+         * a bare name.
+         * @since v22.5.0
+         * @param enabled Enables or disables support for binding named parameters without the prefix character.
+         */
+        setAllowBareNamedParameters(enabled: boolean): void;
+        /**
+         * By default, if an unknown name is encountered while binding parameters, an
+         * exception is thrown. This method allows unknown named parameters to be ignored.
+         * @since v22.15.0
+         * @param enabled Enables or disables support for unknown named parameters.
+         */
+        setAllowUnknownNamedParameters(enabled: boolean): void;
+        /**
+         * When enabled, query results returned by the `all()`, `get()`, and `iterate()` methods will be returned as arrays instead
+         * of objects.
+         * @since v24.0.0
+         * @param enabled Enables or disables the return of query results as arrays.
+         */
+        setReturnArrays(enabled: boolean): void;
+        /**
+         * When reading from the database, SQLite `INTEGER`s are mapped to JavaScript
+         * numbers by default. However, SQLite `INTEGER`s can store values larger than
+         * JavaScript numbers are capable of representing. In such cases, this method can
+         * be used to read `INTEGER` data using JavaScript `BigInt`s. This method has no
+         * impact on database write operations where numbers and `BigInt`s are both
+         * supported at all times.
+         * @since v22.5.0
+         * @param enabled Enables or disables the use of `BigInt`s when reading `INTEGER` fields from the database.
+         */
+        setReadBigInts(enabled: boolean): void;
+        /**
+         * The source SQL text of the prepared statement. This property is a
+         * wrapper around [`sqlite3_sql()`](https://www.sqlite.org/c3ref/expanded_sql.html).
+         * @since v22.5.0
+         */
+        readonly sourceSQL: string;
+    }
+    interface BackupOptions {
+        /**
+         * Name of the source database. This can be `'main'` (the default primary database) or any other
+         * database that have been added with [`ATTACH DATABASE`](https://www.sqlite.org/lang_attach.html)
+         * @default 'main'
+         */
+        source?: string | undefined;
+        /**
+         * Name of the target database. This can be `'main'` (the default primary database) or any other
+         * database that have been added with [`ATTACH DATABASE`](https://www.sqlite.org/lang_attach.html)
+         * @default 'main'
+         */
+        target?: string | undefined;
+        /**
+         * Number of pages to be transmitted in each batch of the backup.
+         * @default 100
+         */
+        rate?: number | undefined;
+        /**
+         * An optional callback function that will be called after each backup step. The argument passed
+         * to this callback is an `Object` with `remainingPages` and `totalPages` properties, describing the current progress
+         * of the backup operation.
+         */
+        progress?: ((progressInfo: BackupProgressInfo) => void) | undefined;
+    }
+    interface BackupProgressInfo {
+        totalPages: number;
+        remainingPages: number;
+    }
+    /**
+     * This method makes a database backup. This method abstracts the
+     * [`sqlite3_backup_init()`](https://www.sqlite.org/c3ref/backup_finish.html#sqlite3backupinit),
+     * [`sqlite3_backup_step()`](https://www.sqlite.org/c3ref/backup_finish.html#sqlite3backupstep)
+     * and [`sqlite3_backup_finish()`](https://www.sqlite.org/c3ref/backup_finish.html#sqlite3backupfinish) functions.
+     *
+     * The backed-up database can be used normally during the backup process. Mutations coming from the same connection - same
+     * `DatabaseSync` - object will be reflected in the backup right away. However, mutations from other connections will cause
+     * the backup process to restart.
+     *
+     * ```js
+     * import { backup, DatabaseSync } from 'node:sqlite';
+     *
+     * const sourceDb = new DatabaseSync('source.db');
+     * const totalPagesTransferred = await backup(sourceDb, 'backup.db', {
+     *   rate: 1, // Copy one page at a time.
+     *   progress: ({ totalPages, remainingPages }) => {
+     *     console.log('Backup in progress', { totalPages, remainingPages });
+     *   },
+     * });
+     *
+     * console.log('Backup completed', totalPagesTransferred);
+     * ```
+     * @since v23.8.0
+     * @param sourceDb The database to backup. The source database must be open.
+     * @param path The path where the backup will be created. If the file already exists,
+     * the contents will be overwritten.
+     * @param options Optional configuration for the backup. The
+     * following properties are supported:
+     * @returns A promise that fulfills with the total number of backed-up pages upon completion, or rejects if an
+     * error occurs.
+     */
+    function backup(sourceDb: DatabaseSync, path: PathLike, options?: BackupOptions): Promise<number>;
+    /**
+     * @since v22.13.0
+     */
+    namespace constants {
+        /**
+         * The conflict handler is invoked with this constant when processing a DELETE or UPDATE change if a row with the required PRIMARY KEY fields is present in the database, but one or more other (non primary-key) fields modified by the update do not contain the expected "before" values.
+         * @since v22.14.0
+         */
+        const SQLITE_CHANGESET_DATA: number;
+        /**
+         * The conflict handler is invoked with this constant when processing a DELETE or UPDATE change if a row with the required PRIMARY KEY fields is not present in the database.
+         * @since v22.14.0
+         */
+        const SQLITE_CHANGESET_NOTFOUND: number;
+        /**
+         * This constant is passed to the conflict handler while processing an INSERT change if the operation would result in duplicate primary key values.
+         * @since v22.14.0
+         */
+        const SQLITE_CHANGESET_CONFLICT: number;
+        /**
+         * If foreign key handling is enabled, and applying a changeset leaves the database in a state containing foreign key violations, the conflict handler is invoked with this constant exactly once before the changeset is committed. If the conflict handler returns `SQLITE_CHANGESET_OMIT`, the changes, including those that caused the foreign key constraint violation, are committed. Or, if it returns `SQLITE_CHANGESET_ABORT`, the changeset is rolled back.
+         * @since v22.14.0
+         */
+        const SQLITE_CHANGESET_FOREIGN_KEY: number;
+        /**
+         * Conflicting changes are omitted.
+         * @since v22.12.0
+         */
+        const SQLITE_CHANGESET_OMIT: number;
+        /**
+         * Conflicting changes replace existing values. Note that this value can only be returned when the type of conflict is either `SQLITE_CHANGESET_DATA` or `SQLITE_CHANGESET_CONFLICT`.
+         * @since v22.12.0
+         */
+        const SQLITE_CHANGESET_REPLACE: number;
+        /**
+         * Abort when a change encounters a conflict and roll back database.
+         * @since v22.12.0
+         */
+        const SQLITE_CHANGESET_ABORT: number;
+        /**
+         * Deny the operation and cause an error to be returned.
+         * @since v24.10.0
+         */
+        const SQLITE_DENY: number;
+        /**
+         * Ignore the operation and continue as if it had never been requested.
+         * @since 24.10.0
+         */
+        const SQLITE_IGNORE: number;
+        /**
+         * Allow the operation to proceed normally.
+         * @since v24.10.0
+         */
+        const SQLITE_OK: number;
+        const SQLITE_CREATE_INDEX: number;
+        const SQLITE_CREATE_TABLE: number;
+        const SQLITE_CREATE_TEMP_INDEX: number;
+        const SQLITE_CREATE_TEMP_TABLE: number;
+        const SQLITE_CREATE_TEMP_TRIGGER: number;
+        const SQLITE_CREATE_TEMP_VIEW: number;
+        const SQLITE_CREATE_TRIGGER: number;
+        const SQLITE_CREATE_VIEW: number;
+        const SQLITE_DELETE: number;
+        const SQLITE_DROP_INDEX: number;
+        const SQLITE_DROP_TABLE: number;
+        const SQLITE_DROP_TEMP_INDEX: number;
+        const SQLITE_DROP_TEMP_TABLE: number;
+        const SQLITE_DROP_TEMP_TRIGGER: number;
+        const SQLITE_DROP_TEMP_VIEW: number;
+        const SQLITE_DROP_TRIGGER: number;
+        const SQLITE_DROP_VIEW: number;
+        const SQLITE_INSERT: number;
+        const SQLITE_PRAGMA: number;
+        const SQLITE_READ: number;
+        const SQLITE_SELECT: number;
+        const SQLITE_TRANSACTION: number;
+        const SQLITE_UPDATE: number;
+        const SQLITE_ATTACH: number;
+        const SQLITE_DETACH: number;
+        const SQLITE_ALTER_TABLE: number;
+        const SQLITE_REINDEX: number;
+        const SQLITE_ANALYZE: number;
+        const SQLITE_CREATE_VTABLE: number;
+        const SQLITE_DROP_VTABLE: number;
+        const SQLITE_FUNCTION: number;
+        const SQLITE_SAVEPOINT: number;
+        const SQLITE_COPY: number;
+        const SQLITE_RECURSIVE: number;
+    }
+}
diff --git a/mqtt-backend/node_modules/@types/node/stream.d.ts b/mqtt-backend/node_modules/@types/node/stream.d.ts
new file mode 100644
index 0000000..1591667
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/stream.d.ts
@@ -0,0 +1,1774 @@
+declare module "node:stream" {
+    import { Blob } from "node:buffer";
+    import { Abortable, EventEmitter } from "node:events";
+    import * as promises from "node:stream/promises";
+    import * as web from "node:stream/web";
+    class Stream extends EventEmitter {
+        /**
+         * @since v0.9.4
+         */
+        pipe<T extends NodeJS.WritableStream>(
+            destination: T,
+            options?: Stream.PipeOptions,
+        ): T;
+    }
+    namespace Stream {
+        export { promises, Stream };
+    }
+    namespace Stream {
+        interface PipeOptions {
+            /**
+             * End the writer when the reader ends.
+             * @default true
+             */
+            end?: boolean | undefined;
+        }
+        interface StreamOptions<T extends Stream> extends Abortable {
+            emitClose?: boolean | undefined;
+            highWaterMark?: number | undefined;
+            objectMode?: boolean | undefined;
+            construct?: ((this: T, callback: (error?: Error | null) => void) => void) | undefined;
+            destroy?: ((this: T, error: Error | null, callback: (error?: Error | null) => void) => void) | undefined;
+            autoDestroy?: boolean | undefined;
+        }
+        interface ReadableOptions<T extends Readable = Readable> extends StreamOptions<T> {
+            encoding?: BufferEncoding | undefined;
+            read?: ((this: T, size: number) => void) | undefined;
+        }
+        interface ReadableIteratorOptions {
+            /**
+             * When set to `false`, calling `return` on the async iterator,
+             * or exiting a `for await...of` iteration using a `break`,
+             * `return`, or `throw` will not destroy the stream.
+             * @default true
+             */
+            destroyOnReturn?: boolean | undefined;
+        }
+        interface ReadableOperatorOptions extends Abortable {
+            /**
+             * The maximum concurrent invocations of `fn` to call
+             * on the stream at once.
+             * @default 1
+             */
+            concurrency?: number | undefined;
+            /**
+             * How many items to buffer while waiting for user consumption
+             * of the output.
+             * @default concurrency * 2 - 1
+             */
+            highWaterMark?: number | undefined;
+        }
+        /** @deprecated Use `ReadableOperatorOptions` instead. */
+        interface ArrayOptions extends ReadableOperatorOptions {}
+        interface ReadableToWebOptions {
+            strategy?: web.QueuingStrategy | undefined;
+            type?: web.ReadableStreamType | undefined;
+        }
+        interface ReadableEventMap {
+            "close": [];
+            "data": [chunk: any];
+            "end": [];
+            "error": [err: Error];
+            "pause": [];
+            "readable": [];
+            "resume": [];
+        }
+        /**
+         * @since v0.9.4
+         */
+        class Readable extends Stream implements NodeJS.ReadableStream {
+            constructor(options?: ReadableOptions);
+            /**
+             * A utility method for creating Readable Streams out of iterators.
+             * @since v12.3.0, v10.17.0
+             * @param iterable Object implementing the `Symbol.asyncIterator` or `Symbol.iterator` iterable protocol. Emits an 'error' event if a null value is passed.
+             * @param options Options provided to `new stream.Readable([options])`. By default, `Readable.from()` will set `options.objectMode` to `true`, unless this is explicitly opted out by setting `options.objectMode` to `false`.
+             */
+            static from(iterable: Iterable<any> | AsyncIterable<any>, options?: ReadableOptions): Readable;
+            /**
+             * A utility method for creating a `Readable` from a web `ReadableStream`.
+             * @since v17.0.0
+             */
+            static fromWeb(
+                readableStream: web.ReadableStream,
+                options?: Pick<ReadableOptions, "encoding" | "highWaterMark" | "objectMode" | "signal">,
+            ): Readable;
+            /**
+             * A utility method for creating a web `ReadableStream` from a `Readable`.
+             * @since v17.0.0
+             */
+            static toWeb(
+                streamReadable: NodeJS.ReadableStream,
+                options?: ReadableToWebOptions,
+            ): web.ReadableStream;
+            /**
+             * Returns whether the stream has been read from or cancelled.
+             * @since v16.8.0
+             */
+            static isDisturbed(stream: NodeJS.ReadableStream | web.ReadableStream): boolean;
+            /**
+             * Returns whether the stream was destroyed or errored before emitting `'end'`.
+             * @since v16.8.0
+             */
+            readonly readableAborted: boolean;
+            /**
+             * Is `true` if it is safe to call {@link read}, which means
+             * the stream has not been destroyed or emitted `'error'` or `'end'`.
+             * @since v11.4.0
+             */
+            readable: boolean;
+            /**
+             * Returns whether `'data'` has been emitted.
+             * @since v16.7.0, v14.18.0
+             */
+            readonly readableDidRead: boolean;
+            /**
+             * Getter for the property `encoding` of a given `Readable` stream. The `encoding` property can be set using the {@link setEncoding} method.
+             * @since v12.7.0
+             */
+            readonly readableEncoding: BufferEncoding | null;
+            /**
+             * Becomes `true` when [`'end'`](https://nodejs.org/docs/latest-v25.x/api/stream.html#event-end) event is emitted.
+             * @since v12.9.0
+             */
+            readonly readableEnded: boolean;
+            /**
+             * This property reflects the current state of a `Readable` stream as described
+             * in the [Three states](https://nodejs.org/docs/latest-v25.x/api/stream.html#three-states) section.
+             * @since v9.4.0
+             */
+            readableFlowing: boolean | null;
+            /**
+             * Returns the value of `highWaterMark` passed when creating this `Readable`.
+             * @since v9.3.0
+             */
+            readonly readableHighWaterMark: number;
+            /**
+             * This property contains the number of bytes (or objects) in the queue
+             * ready to be read. The value provides introspection data regarding
+             * the status of the `highWaterMark`.
+             * @since v9.4.0
+             */
+            readonly readableLength: number;
+            /**
+             * Getter for the property `objectMode` of a given `Readable` stream.
+             * @since v12.3.0
+             */
+            readonly readableObjectMode: boolean;
+            /**
+             * Is `true` after `readable.destroy()` has been called.
+             * @since v8.0.0
+             */
+            destroyed: boolean;
+            /**
+             * Is `true` after `'close'` has been emitted.
+             * @since v18.0.0
+             */
+            readonly closed: boolean;
+            /**
+             * Returns error if the stream has been destroyed with an error.
+             * @since v18.0.0
+             */
+            readonly errored: Error | null;
+            _construct?(callback: (error?: Error | null) => void): void;
+            _read(size: number): void;
+            /**
+             * The `readable.read()` method reads data out of the internal buffer and
+             * returns it. If no data is available to be read, `null` is returned. By default,
+             * the data is returned as a `Buffer` object unless an encoding has been
+             * specified using the `readable.setEncoding()` method or the stream is operating
+             * in object mode.
+             *
+             * The optional `size` argument specifies a specific number of bytes to read. If
+             * `size` bytes are not available to be read, `null` will be returned _unless_ the
+             * stream has ended, in which case all of the data remaining in the internal buffer
+             * will be returned.
+             *
+             * If the `size` argument is not specified, all of the data contained in the
+             * internal buffer will be returned.
+             *
+             * The `size` argument must be less than or equal to 1 GiB.
+             *
+             * The `readable.read()` method should only be called on `Readable` streams
+             * operating in paused mode. In flowing mode, `readable.read()` is called
+             * automatically until the internal buffer is fully drained.
+             *
+             * ```js
+             * const readable = getReadableStreamSomehow();
+             *
+             * // 'readable' may be triggered multiple times as data is buffered in
+             * readable.on('readable', () => {
+             *   let chunk;
+             *   console.log('Stream is readable (new data received in buffer)');
+             *   // Use a loop to make sure we read all currently available data
+             *   while (null !== (chunk = readable.read())) {
+             *     console.log(`Read ${chunk.length} bytes of data...`);
+             *   }
+             * });
+             *
+             * // 'end' will be triggered once when there is no more data available
+             * readable.on('end', () => {
+             *   console.log('Reached end of stream.');
+             * });
+             * ```
+             *
+             * Each call to `readable.read()` returns a chunk of data, or `null`. The chunks
+             * are not concatenated. A `while` loop is necessary to consume all data
+             * currently in the buffer. When reading a large file `.read()` may return `null`,
+             * having consumed all buffered content so far, but there is still more data to
+             * come not yet buffered. In this case a new `'readable'` event will be emitted
+             * when there is more data in the buffer. Finally the `'end'` event will be
+             * emitted when there is no more data to come.
+             *
+             * Therefore to read a file's whole contents from a `readable`, it is necessary
+             * to collect chunks across multiple `'readable'` events:
+             *
+             * ```js
+             * const chunks = [];
+             *
+             * readable.on('readable', () => {
+             *   let chunk;
+             *   while (null !== (chunk = readable.read())) {
+             *     chunks.push(chunk);
+             *   }
+             * });
+             *
+             * readable.on('end', () => {
+             *   const content = chunks.join('');
+             * });
+             * ```
+             *
+             * A `Readable` stream in object mode will always return a single item from
+             * a call to `readable.read(size)`, regardless of the value of the `size` argument.
+             *
+             * If the `readable.read()` method returns a chunk of data, a `'data'` event will
+             * also be emitted.
+             *
+             * Calling {@link read} after the `'end'` event has
+             * been emitted will return `null`. No runtime error will be raised.
+             * @since v0.9.4
+             * @param size Optional argument to specify how much data to read.
+             */
+            read(size?: number): any;
+            /**
+             * The `readable.setEncoding()` method sets the character encoding for
+             * data read from the `Readable` stream.
+             *
+             * By default, no encoding is assigned and stream data will be returned as `Buffer` objects. Setting an encoding causes the stream data
+             * to be returned as strings of the specified encoding rather than as `Buffer` objects. For instance, calling `readable.setEncoding('utf8')` will cause the
+             * output data to be interpreted as UTF-8 data, and passed as strings. Calling `readable.setEncoding('hex')` will cause the data to be encoded in hexadecimal
+             * string format.
+             *
+             * The `Readable` stream will properly handle multi-byte characters delivered
+             * through the stream that would otherwise become improperly decoded if simply
+             * pulled from the stream as `Buffer` objects.
+             *
+             * ```js
+             * const readable = getReadableStreamSomehow();
+             * readable.setEncoding('utf8');
+             * readable.on('data', (chunk) => {
+             *   assert.equal(typeof chunk, 'string');
+             *   console.log('Got %d characters of string data:', chunk.length);
+             * });
+             * ```
+             * @since v0.9.4
+             * @param encoding The encoding to use.
+             */
+            setEncoding(encoding: BufferEncoding): this;
+            /**
+             * The `readable.pause()` method will cause a stream in flowing mode to stop
+             * emitting `'data'` events, switching out of flowing mode. Any data that
+             * becomes available will remain in the internal buffer.
+             *
+             * ```js
+             * const readable = getReadableStreamSomehow();
+             * readable.on('data', (chunk) => {
+             *   console.log(`Received ${chunk.length} bytes of data.`);
+             *   readable.pause();
+             *   console.log('There will be no additional data for 1 second.');
+             *   setTimeout(() => {
+             *     console.log('Now data will start flowing again.');
+             *     readable.resume();
+             *   }, 1000);
+             * });
+             * ```
+             *
+             * The `readable.pause()` method has no effect if there is a `'readable'` event listener.
+             * @since v0.9.4
+             */
+            pause(): this;
+            /**
+             * The `readable.resume()` method causes an explicitly paused `Readable` stream to
+             * resume emitting `'data'` events, switching the stream into flowing mode.
+             *
+             * The `readable.resume()` method can be used to fully consume the data from a
+             * stream without actually processing any of that data:
+             *
+             * ```js
+             * getReadableStreamSomehow()
+             *   .resume()
+             *   .on('end', () => {
+             *     console.log('Reached the end, but did not read anything.');
+             *   });
+             * ```
+             *
+             * The `readable.resume()` method has no effect if there is a `'readable'` event listener.
+             * @since v0.9.4
+             */
+            resume(): this;
+            /**
+             * The `readable.isPaused()` method returns the current operating state of the `Readable`.
+             * This is used primarily by the mechanism that underlies the `readable.pipe()` method.
+             * In most typical cases, there will be no reason to use this method directly.
+             *
+             * ```js
+             * const readable = new stream.Readable();
+             *
+             * readable.isPaused(); // === false
+             * readable.pause();
+             * readable.isPaused(); // === true
+             * readable.resume();
+             * readable.isPaused(); // === false
+             * ```
+             * @since v0.11.14
+             */
+            isPaused(): boolean;
+            /**
+             * The `readable.unpipe()` method detaches a `Writable` stream previously attached
+             * using the {@link pipe} method.
+             *
+             * If the `destination` is not specified, then _all_ pipes are detached.
+             *
+             * If the `destination` is specified, but no pipe is set up for it, then
+             * the method does nothing.
+             *
+             * ```js
+             * import fs from 'node:fs';
+             * const readable = getReadableStreamSomehow();
+             * const writable = fs.createWriteStream('file.txt');
+             * // All the data from readable goes into 'file.txt',
+             * // but only for the first second.
+             * readable.pipe(writable);
+             * setTimeout(() => {
+             *   console.log('Stop writing to file.txt.');
+             *   readable.unpipe(writable);
+             *   console.log('Manually close the file stream.');
+             *   writable.end();
+             * }, 1000);
+             * ```
+             * @since v0.9.4
+             * @param destination Optional specific stream to unpipe
+             */
+            unpipe(destination?: NodeJS.WritableStream): this;
+            /**
+             * Passing `chunk` as `null` signals the end of the stream (EOF) and behaves the
+             * same as `readable.push(null)`, after which no more data can be written. The EOF
+             * signal is put at the end of the buffer and any buffered data will still be
+             * flushed.
+             *
+             * The `readable.unshift()` method pushes a chunk of data back into the internal
+             * buffer. This is useful in certain situations where a stream is being consumed by
+             * code that needs to "un-consume" some amount of data that it has optimistically
+             * pulled out of the source, so that the data can be passed on to some other party.
+             *
+             * The `stream.unshift(chunk)` method cannot be called after the `'end'` event
+             * has been emitted or a runtime error will be thrown.
+             *
+             * Developers using `stream.unshift()` often should consider switching to
+             * use of a `Transform` stream instead. See the `API for stream implementers` section for more information.
+             *
+             * ```js
+             * // Pull off a header delimited by \n\n.
+             * // Use unshift() if we get too much.
+             * // Call the callback with (error, header, stream).
+             * import { StringDecoder } from 'node:string_decoder';
+             * function parseHeader(stream, callback) {
+             *   stream.on('error', callback);
+             *   stream.on('readable', onReadable);
+             *   const decoder = new StringDecoder('utf8');
+             *   let header = '';
+             *   function onReadable() {
+             *     let chunk;
+             *     while (null !== (chunk = stream.read())) {
+             *       const str = decoder.write(chunk);
+             *       if (str.includes('\n\n')) {
+             *         // Found the header boundary.
+             *         const split = str.split(/\n\n/);
+             *         header += split.shift();
+             *         const remaining = split.join('\n\n');
+             *         const buf = Buffer.from(remaining, 'utf8');
+             *         stream.removeListener('error', callback);
+             *         // Remove the 'readable' listener before unshifting.
+             *         stream.removeListener('readable', onReadable);
+             *         if (buf.length)
+             *           stream.unshift(buf);
+             *         // Now the body of the message can be read from the stream.
+             *         callback(null, header, stream);
+             *         return;
+             *       }
+             *       // Still reading the header.
+             *       header += str;
+             *     }
+             *   }
+             * }
+             * ```
+             *
+             * Unlike {@link push}, `stream.unshift(chunk)` will not
+             * end the reading process by resetting the internal reading state of the stream.
+             * This can cause unexpected results if `readable.unshift()` is called during a
+             * read (i.e. from within a {@link _read} implementation on a
+             * custom stream). Following the call to `readable.unshift()` with an immediate {@link push} will reset the reading state appropriately,
+             * however it is best to simply avoid calling `readable.unshift()` while in the
+             * process of performing a read.
+             * @since v0.9.11
+             * @param chunk Chunk of data to unshift onto the read queue. For streams not operating in object mode, `chunk` must
+             * be a {string}, {Buffer}, {TypedArray}, {DataView} or `null`. For object mode streams, `chunk` may be any JavaScript value.
+             * @param encoding Encoding of string chunks. Must be a valid `Buffer` encoding, such as `'utf8'` or `'ascii'`.
+             */
+            unshift(chunk: any, encoding?: BufferEncoding): void;
+            /**
+             * Prior to Node.js 0.10, streams did not implement the entire `node:stream` module API as it is currently defined. (See `Compatibility` for more
+             * information.)
+             *
+             * When using an older Node.js library that emits `'data'` events and has a {@link pause} method that is advisory only, the `readable.wrap()` method can be used to create a `Readable`
+             * stream that uses
+             * the old stream as its data source.
+             *
+             * It will rarely be necessary to use `readable.wrap()` but the method has been
+             * provided as a convenience for interacting with older Node.js applications and
+             * libraries.
+             *
+             * ```js
+             * import { OldReader } from './old-api-module.js';
+             * import { Readable } from 'node:stream';
+             * const oreader = new OldReader();
+             * const myReader = new Readable().wrap(oreader);
+             *
+             * myReader.on('readable', () => {
+             *   myReader.read(); // etc.
+             * });
+             * ```
+             * @since v0.9.4
+             * @param stream An "old style" readable stream
+             */
+            wrap(stream: NodeJS.ReadableStream): this;
+            push(chunk: any, encoding?: BufferEncoding): boolean;
+            /**
+             * ```js
+             * import { Readable } from 'node:stream';
+             *
+             * async function* splitToWords(source) {
+             *   for await (const chunk of source) {
+             *     const words = String(chunk).split(' ');
+             *
+             *     for (const word of words) {
+             *       yield word;
+             *     }
+             *   }
+             * }
+             *
+             * const wordsStream = Readable.from(['text passed through', 'composed stream']).compose(splitToWords);
+             * const words = await wordsStream.toArray();
+             *
+             * console.log(words); // prints ['text', 'passed', 'through', 'composed', 'stream']
+             * ```
+             *
+             * `readable.compose(s)` is equivalent to `stream.compose(readable, s)`.
+             *
+             * This method also allows for an `AbortSignal` to be provided, which will destroy
+             * the composed stream when aborted.
+             *
+             * See [`stream.compose(...streams)`](https://nodejs.org/docs/latest-v25.x/api/stream.html#streamcomposestreams) for more information.
+             * @since v19.1.0, v18.13.0
+             * @returns a stream composed with the stream `stream`.
+             */
+            compose(
+                stream: NodeJS.WritableStream | web.WritableStream | web.TransformStream | ((source: any) => void),
+                options?: Abortable,
+            ): Duplex;
+            /**
+             * The iterator created by this method gives users the option to cancel the destruction
+             * of the stream if the `for await...of` loop is exited by `return`, `break`, or `throw`,
+             * or if the iterator should destroy the stream if the stream emitted an error during iteration.
+             * @since v16.3.0
+             */
+            iterator(options?: ReadableIteratorOptions): NodeJS.AsyncIterator<any>;
+            /**
+             * This method allows mapping over the stream. The *fn* function will be called for every chunk in the stream.
+             * If the *fn* function returns a promise - that promise will be `await`ed before being passed to the result stream.
+             * @since v17.4.0, v16.14.0
+             * @param fn a function to map over every chunk in the stream. Async or not.
+             * @returns a stream mapped with the function *fn*.
+             */
+            map(fn: (data: any, options?: Abortable) => any, options?: ReadableOperatorOptions): Readable;
+            /**
+             * This method allows filtering the stream. For each chunk in the stream the *fn* function will be called
+             * and if it returns a truthy value, the chunk will be passed to the result stream.
+             * If the *fn* function returns a promise - that promise will be `await`ed.
+             * @since v17.4.0, v16.14.0
+             * @param fn a function to filter chunks from the stream. Async or not.
+             * @returns a stream filtered with the predicate *fn*.
+             */
+            filter(
+                fn: (data: any, options?: Abortable) => boolean | Promise<boolean>,
+                options?: ReadableOperatorOptions,
+            ): Readable;
+            /**
+             * This method allows iterating a stream. For each chunk in the stream the *fn* function will be called.
+             * If the *fn* function returns a promise - that promise will be `await`ed.
+             *
+             * This method is different from `for await...of` loops in that it can optionally process chunks concurrently.
+             * In addition, a `forEach` iteration can only be stopped by having passed a `signal` option
+             * and aborting the related AbortController while `for await...of` can be stopped with `break` or `return`.
+             * In either case the stream will be destroyed.
+             *
+             * This method is different from listening to the `'data'` event in that it uses the `readable` event
+             * in the underlying machinary and can limit the number of concurrent *fn* calls.
+             * @since v17.5.0
+             * @param fn a function to call on each chunk of the stream. Async or not.
+             * @returns a promise for when the stream has finished.
+             */
+            forEach(
+                fn: (data: any, options?: Abortable) => void | Promise<void>,
+                options?: Pick<ReadableOperatorOptions, "concurrency" | "signal">,
+            ): Promise<void>;
+            /**
+             * This method allows easily obtaining the contents of a stream.
+             *
+             * As this method reads the entire stream into memory, it negates the benefits of streams. It's intended
+             * for interoperability and convenience, not as the primary way to consume streams.
+             * @since v17.5.0
+             * @returns a promise containing an array with the contents of the stream.
+             */
+            toArray(options?: Abortable): Promise<any[]>;
+            /**
+             * This method is similar to `Array.prototype.some` and calls *fn* on each chunk in the stream
+             * until the awaited return value is `true` (or any truthy value). Once an *fn* call on a chunk
+             * `await`ed return value is truthy, the stream is destroyed and the promise is fulfilled with `true`.
+             * If none of the *fn* calls on the chunks return a truthy value, the promise is fulfilled with `false`.
+             * @since v17.5.0
+             * @param fn a function to call on each chunk of the stream. Async or not.
+             * @returns a promise evaluating to `true` if *fn* returned a truthy value for at least one of the chunks.
+             */
+            some(
+                fn: (data: any, options?: Abortable) => boolean | Promise<boolean>,
+                options?: Pick<ReadableOperatorOptions, "concurrency" | "signal">,
+            ): Promise<boolean>;
+            /**
+             * This method is similar to `Array.prototype.find` and calls *fn* on each chunk in the stream
+             * to find a chunk with a truthy value for *fn*. Once an *fn* call's awaited return value is truthy,
+             * the stream is destroyed and the promise is fulfilled with value for which *fn* returned a truthy value.
+             * If all of the *fn* calls on the chunks return a falsy value, the promise is fulfilled with `undefined`.
+             * @since v17.5.0
+             * @param fn a function to call on each chunk of the stream. Async or not.
+             * @returns a promise evaluating to the first chunk for which *fn* evaluated with a truthy value,
+             * or `undefined` if no element was found.
+             */
+            find<T>(
+                fn: (data: any, options?: Abortable) => data is T,
+                options?: Pick<ReadableOperatorOptions, "concurrency" | "signal">,
+            ): Promise<T | undefined>;
+            find(
+                fn: (data: any, options?: Abortable) => boolean | Promise<boolean>,
+                options?: Pick<ReadableOperatorOptions, "concurrency" | "signal">,
+            ): Promise<any>;
+            /**
+             * This method is similar to `Array.prototype.every` and calls *fn* on each chunk in the stream
+             * to check if all awaited return values are truthy value for *fn*. Once an *fn* call on a chunk
+             * `await`ed return value is falsy, the stream is destroyed and the promise is fulfilled with `false`.
+             * If all of the *fn* calls on the chunks return a truthy value, the promise is fulfilled with `true`.
+             * @since v17.5.0
+             * @param fn a function to call on each chunk of the stream. Async or not.
+             * @returns a promise evaluating to `true` if *fn* returned a truthy value for every one of the chunks.
+             */
+            every(
+                fn: (data: any, options?: Abortable) => boolean | Promise<boolean>,
+                options?: Pick<ReadableOperatorOptions, "concurrency" | "signal">,
+            ): Promise<boolean>;
+            /**
+             * This method returns a new stream by applying the given callback to each chunk of the stream
+             * and then flattening the result.
+             *
+             * It is possible to return a stream or another iterable or async iterable from *fn* and the result streams
+             * will be merged (flattened) into the returned stream.
+             * @since v17.5.0
+             * @param fn a function to map over every chunk in the stream. May be async. May be a stream or generator.
+             * @returns a stream flat-mapped with the function *fn*.
+             */
+            flatMap(
+                fn: (data: any, options?: Abortable) => any,
+                options?: Pick<ReadableOperatorOptions, "concurrency" | "signal">,
+            ): Readable;
+            /**
+             * This method returns a new stream with the first *limit* chunks dropped from the start.
+             * @since v17.5.0
+             * @param limit the number of chunks to drop from the readable.
+             * @returns a stream with *limit* chunks dropped from the start.
+             */
+            drop(limit: number, options?: Abortable): Readable;
+            /**
+             * This method returns a new stream with the first *limit* chunks.
+             * @since v17.5.0
+             * @param limit the number of chunks to take from the readable.
+             * @returns a stream with *limit* chunks taken.
+             */
+            take(limit: number, options?: Abortable): Readable;
+            /**
+             * This method calls *fn* on each chunk of the stream in order, passing it the result from the calculation
+             * on the previous element. It returns a promise for the final value of the reduction.
+             *
+             * If no *initial* value is supplied the first chunk of the stream is used as the initial value.
+             * If the stream is empty, the promise is rejected with a `TypeError` with the `ERR_INVALID_ARGS` code property.
+             *
+             * The reducer function iterates the stream element-by-element which means that there is no *concurrency* parameter
+             * or parallelism. To perform a reduce concurrently, you can extract the async function to `readable.map` method.
+             * @since v17.5.0
+             * @param fn a reducer function to call over every chunk in the stream. Async or not.
+             * @param initial the initial value to use in the reduction.
+             * @returns a promise for the final value of the reduction.
+             */
+            reduce<T>(fn: (previous: any, data: any, options?: Abortable) => T): Promise<T>;
+            reduce<T>(
+                fn: (previous: T, data: any, options?: Abortable) => T,
+                initial: T,
+                options?: Abortable,
+            ): Promise<T>;
+            _destroy(error: Error | null, callback: (error?: Error | null) => void): void;
+            /**
+             * Destroy the stream. Optionally emit an `'error'` event, and emit a `'close'` event (unless `emitClose` is set to `false`). After this call, the readable
+             * stream will release any internal resources and subsequent calls to `push()` will be ignored.
+             *
+             * Once `destroy()` has been called any further calls will be a no-op and no
+             * further errors except from `_destroy()` may be emitted as `'error'`.
+             *
+             * Implementors should not override this method, but instead implement `readable._destroy()`.
+             * @since v8.0.0
+             * @param error Error which will be passed as payload in `'error'` event
+             */
+            destroy(error?: Error): this;
+            /**
+             * @returns `AsyncIterator` to fully consume the stream.
+             * @since v10.0.0
+             */
+            [Symbol.asyncIterator](): NodeJS.AsyncIterator<any>;
+            /**
+             * Calls `readable.destroy()` with an `AbortError` and returns
+             * a promise that fulfills when the stream is finished.
+             * @since v20.4.0
+             */
+            [Symbol.asyncDispose](): Promise<void>;
+            // #region InternalEventEmitter
+            addListener<E extends keyof ReadableEventMap>(
+                eventName: E,
+                listener: (...args: ReadableEventMap[E]) => void,
+            ): this;
+            addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            emit<E extends keyof ReadableEventMap>(eventName: E, ...args: ReadableEventMap[E]): boolean;
+            emit(eventName: string | symbol, ...args: any[]): boolean;
+            listenerCount<E extends keyof ReadableEventMap>(
+                eventName: E,
+                listener?: (...args: ReadableEventMap[E]) => void,
+            ): number;
+            listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+            listeners<E extends keyof ReadableEventMap>(eventName: E): ((...args: ReadableEventMap[E]) => void)[];
+            listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+            off<E extends keyof ReadableEventMap>(eventName: E, listener: (...args: ReadableEventMap[E]) => void): this;
+            off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            on<E extends keyof ReadableEventMap>(eventName: E, listener: (...args: ReadableEventMap[E]) => void): this;
+            on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            once<E extends keyof ReadableEventMap>(
+                eventName: E,
+                listener: (...args: ReadableEventMap[E]) => void,
+            ): this;
+            once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            prependListener<E extends keyof ReadableEventMap>(
+                eventName: E,
+                listener: (...args: ReadableEventMap[E]) => void,
+            ): this;
+            prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            prependOnceListener<E extends keyof ReadableEventMap>(
+                eventName: E,
+                listener: (...args: ReadableEventMap[E]) => void,
+            ): this;
+            prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            rawListeners<E extends keyof ReadableEventMap>(eventName: E): ((...args: ReadableEventMap[E]) => void)[];
+            rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+            // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+            removeAllListeners<E extends keyof ReadableEventMap>(eventName?: E): this;
+            removeAllListeners(eventName?: string | symbol): this;
+            removeListener<E extends keyof ReadableEventMap>(
+                eventName: E,
+                listener: (...args: ReadableEventMap[E]) => void,
+            ): this;
+            removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            // #endregion
+        }
+        interface WritableOptions<T extends Writable = Writable> extends StreamOptions<T> {
+            decodeStrings?: boolean | undefined;
+            defaultEncoding?: BufferEncoding | undefined;
+            write?:
+                | ((
+                    this: T,
+                    chunk: any,
+                    encoding: BufferEncoding,
+                    callback: (error?: Error | null) => void,
+                ) => void)
+                | undefined;
+            writev?:
+                | ((
+                    this: T,
+                    chunks: {
+                        chunk: any;
+                        encoding: BufferEncoding;
+                    }[],
+                    callback: (error?: Error | null) => void,
+                ) => void)
+                | undefined;
+            final?: ((this: T, callback: (error?: Error | null) => void) => void) | undefined;
+        }
+        interface WritableEventMap {
+            "close": [];
+            "drain": [];
+            "error": [err: Error];
+            "finish": [];
+            "pipe": [src: Readable];
+            "unpipe": [src: Readable];
+        }
+        /**
+         * @since v0.9.4
+         */
+        class Writable extends Stream implements NodeJS.WritableStream {
+            constructor(options?: WritableOptions);
+            /**
+             * A utility method for creating a `Writable` from a web `WritableStream`.
+             * @since v17.0.0
+             */
+            static fromWeb(
+                writableStream: web.WritableStream,
+                options?: Pick<WritableOptions, "decodeStrings" | "highWaterMark" | "objectMode" | "signal">,
+            ): Writable;
+            /**
+             * A utility method for creating a web `WritableStream` from a `Writable`.
+             * @since v17.0.0
+             */
+            static toWeb(streamWritable: NodeJS.WritableStream): web.WritableStream;
+            /**
+             * Is `true` if it is safe to call `writable.write()`, which means
+             * the stream has not been destroyed, errored, or ended.
+             * @since v11.4.0
+             */
+            writable: boolean;
+            /**
+             * Returns whether the stream was destroyed or errored before emitting `'finish'`.
+             * @since v18.0.0, v16.17.0
+             */
+            readonly writableAborted: boolean;
+            /**
+             * Is `true` after `writable.end()` has been called. This property
+             * does not indicate whether the data has been flushed, for this use `writable.writableFinished` instead.
+             * @since v12.9.0
+             */
+            readonly writableEnded: boolean;
+            /**
+             * Is set to `true` immediately before the `'finish'` event is emitted.
+             * @since v12.6.0
+             */
+            readonly writableFinished: boolean;
+            /**
+             * Return the value of `highWaterMark` passed when creating this `Writable`.
+             * @since v9.3.0
+             */
+            readonly writableHighWaterMark: number;
+            /**
+             * This property contains the number of bytes (or objects) in the queue
+             * ready to be written. The value provides introspection data regarding
+             * the status of the `highWaterMark`.
+             * @since v9.4.0
+             */
+            readonly writableLength: number;
+            /**
+             * Getter for the property `objectMode` of a given `Writable` stream.
+             * @since v12.3.0
+             */
+            readonly writableObjectMode: boolean;
+            /**
+             * Number of times `writable.uncork()` needs to be
+             * called in order to fully uncork the stream.
+             * @since v13.2.0, v12.16.0
+             */
+            readonly writableCorked: number;
+            /**
+             * Is `true` after `writable.destroy()` has been called.
+             * @since v8.0.0
+             */
+            destroyed: boolean;
+            /**
+             * Is `true` after `'close'` has been emitted.
+             * @since v18.0.0
+             */
+            readonly closed: boolean;
+            /**
+             * Returns error if the stream has been destroyed with an error.
+             * @since v18.0.0
+             */
+            readonly errored: Error | null;
+            /**
+             * Is `true` if the stream's buffer has been full and stream will emit `'drain'`.
+             * @since v15.2.0, v14.17.0
+             */
+            readonly writableNeedDrain: boolean;
+            _write(chunk: any, encoding: BufferEncoding, callback: (error?: Error | null) => void): void;
+            _writev?(
+                chunks: {
+                    chunk: any;
+                    encoding: BufferEncoding;
+                }[],
+                callback: (error?: Error | null) => void,
+            ): void;
+            _construct?(callback: (error?: Error | null) => void): void;
+            _destroy(error: Error | null, callback: (error?: Error | null) => void): void;
+            _final(callback: (error?: Error | null) => void): void;
+            /**
+             * The `writable.write()` method writes some data to the stream, and calls the
+             * supplied `callback` once the data has been fully handled. If an error
+             * occurs, the `callback` will be called with the error as its
+             * first argument. The `callback` is called asynchronously and before `'error'` is
+             * emitted.
+             *
+             * The return value is `true` if the internal buffer is less than the `highWaterMark` configured when the stream was created after admitting `chunk`.
+             * If `false` is returned, further attempts to write data to the stream should
+             * stop until the `'drain'` event is emitted.
+             *
+             * While a stream is not draining, calls to `write()` will buffer `chunk`, and
+             * return false. Once all currently buffered chunks are drained (accepted for
+             * delivery by the operating system), the `'drain'` event will be emitted.
+             * Once `write()` returns false, do not write more chunks
+             * until the `'drain'` event is emitted. While calling `write()` on a stream that
+             * is not draining is allowed, Node.js will buffer all written chunks until
+             * maximum memory usage occurs, at which point it will abort unconditionally.
+             * Even before it aborts, high memory usage will cause poor garbage collector
+             * performance and high RSS (which is not typically released back to the system,
+             * even after the memory is no longer required). Since TCP sockets may never
+             * drain if the remote peer does not read the data, writing a socket that is
+             * not draining may lead to a remotely exploitable vulnerability.
+             *
+             * Writing data while the stream is not draining is particularly
+             * problematic for a `Transform`, because the `Transform` streams are paused
+             * by default until they are piped or a `'data'` or `'readable'` event handler
+             * is added.
+             *
+             * If the data to be written can be generated or fetched on demand, it is
+             * recommended to encapsulate the logic into a `Readable` and use {@link pipe}. However, if calling `write()` is preferred, it is
+             * possible to respect backpressure and avoid memory issues using the `'drain'` event:
+             *
+             * ```js
+             * function write(data, cb) {
+             *   if (!stream.write(data)) {
+             *     stream.once('drain', cb);
+             *   } else {
+             *     process.nextTick(cb);
+             *   }
+             * }
+             *
+             * // Wait for cb to be called before doing any other write.
+             * write('hello', () => {
+             *   console.log('Write completed, do more writes now.');
+             * });
+             * ```
+             *
+             * A `Writable` stream in object mode will always ignore the `encoding` argument.
+             * @since v0.9.4
+             * @param chunk Optional data to write. For streams not operating in object mode, `chunk` must be a {string}, {Buffer},
+             * {TypedArray} or {DataView}. For object mode streams, `chunk` may be any JavaScript value other than `null`.
+             * @param callback Callback for when this chunk of data is flushed.
+             * @return `false` if the stream wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
+             */
+            write(chunk: any, callback?: (error: Error | null | undefined) => void): boolean;
+            /**
+             * Writes data to the stream, with an explicit encoding for string data.
+             * @see {@link Writable.write} for full details.
+             * @since v0.9.4
+             * @param chunk Optional data to write. For streams not operating in object mode, `chunk` must be a {string}, {Buffer},
+             * {TypedArray} or {DataView}. For object mode streams, `chunk` may be any JavaScript value other than `null`.
+             * @param encoding The encoding, if `chunk` is a string.
+             * @param callback Callback for when this chunk of data is flushed.
+             * @return `false` if the stream wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
+             */
+            write(chunk: any, encoding: BufferEncoding, callback?: (error: Error | null | undefined) => void): boolean;
+            /**
+             * The `writable.setDefaultEncoding()` method sets the default `encoding` for a `Writable` stream.
+             * @since v0.11.15
+             * @param encoding The new default encoding
+             */
+            setDefaultEncoding(encoding: BufferEncoding): this;
+            /**
+             * Calling the `writable.end()` method signals that no more data will be written
+             * to the `Writable`. The optional `chunk` and `encoding` arguments allow one
+             * final additional chunk of data to be written immediately before closing the
+             * stream.
+             *
+             * Calling the {@link write} method after calling {@link end} will raise an error.
+             *
+             * ```js
+             * // Write 'hello, ' and then end with 'world!'.
+             * import fs from 'node:fs';
+             * const file = fs.createWriteStream('example.txt');
+             * file.write('hello, ');
+             * file.end('world!');
+             * // Writing more now is not allowed!
+             * ```
+             * @since v0.9.4
+             * @param cb Callback for when the stream is finished.
+             */
+            end(cb?: () => void): this;
+            /**
+             * Signals that no more data will be written, with one final chunk of data.
+             * @see {@link Writable.end} for full details.
+             * @since v0.9.4
+             * @param chunk Optional data to write. For streams not operating in object mode, `chunk` must be a {string}, {Buffer},
+             * {TypedArray} or {DataView}. For object mode streams, `chunk` may be any JavaScript value other than `null`.
+             * @param cb Callback for when the stream is finished.
+             */
+            end(chunk: any, cb?: () => void): this;
+            /**
+             * Signals that no more data will be written, with one final chunk of data.
+             * @see {@link Writable.end} for full details.
+             * @since v0.9.4
+             * @param chunk Optional data to write. For streams not operating in object mode, `chunk` must be a {string}, {Buffer},
+             * {TypedArray} or {DataView}. For object mode streams, `chunk` may be any JavaScript value other than `null`.
+             * @param encoding The encoding if `chunk` is a string
+             * @param cb Callback for when the stream is finished.
+             */
+            end(chunk: any, encoding: BufferEncoding, cb?: () => void): this;
+            /**
+             * The `writable.cork()` method forces all written data to be buffered in memory.
+             * The buffered data will be flushed when either the {@link uncork} or {@link end} methods are called.
+             *
+             * The primary intent of `writable.cork()` is to accommodate a situation in which
+             * several small chunks are written to the stream in rapid succession. Instead of
+             * immediately forwarding them to the underlying destination, `writable.cork()` buffers all the chunks until `writable.uncork()` is called, which will pass them
+             * all to `writable._writev()`, if present. This prevents a head-of-line blocking
+             * situation where data is being buffered while waiting for the first small chunk
+             * to be processed. However, use of `writable.cork()` without implementing `writable._writev()` may have an adverse effect on throughput.
+             *
+             * See also: `writable.uncork()`, `writable._writev()`.
+             * @since v0.11.2
+             */
+            cork(): void;
+            /**
+             * The `writable.uncork()` method flushes all data buffered since {@link cork} was called.
+             *
+             * When using `writable.cork()` and `writable.uncork()` to manage the buffering
+             * of writes to a stream, defer calls to `writable.uncork()` using `process.nextTick()`. Doing so allows batching of all `writable.write()` calls that occur within a given Node.js event
+             * loop phase.
+             *
+             * ```js
+             * stream.cork();
+             * stream.write('some ');
+             * stream.write('data ');
+             * process.nextTick(() => stream.uncork());
+             * ```
+             *
+             * If the `writable.cork()` method is called multiple times on a stream, the
+             * same number of calls to `writable.uncork()` must be called to flush the buffered
+             * data.
+             *
+             * ```js
+             * stream.cork();
+             * stream.write('some ');
+             * stream.cork();
+             * stream.write('data ');
+             * process.nextTick(() => {
+             *   stream.uncork();
+             *   // The data will not be flushed until uncork() is called a second time.
+             *   stream.uncork();
+             * });
+             * ```
+             *
+             * See also: `writable.cork()`.
+             * @since v0.11.2
+             */
+            uncork(): void;
+            /**
+             * Destroy the stream. Optionally emit an `'error'` event, and emit a `'close'` event (unless `emitClose` is set to `false`). After this call, the writable
+             * stream has ended and subsequent calls to `write()` or `end()` will result in
+             * an `ERR_STREAM_DESTROYED` error.
+             * This is a destructive and immediate way to destroy a stream. Previous calls to `write()` may not have drained, and may trigger an `ERR_STREAM_DESTROYED` error.
+             * Use `end()` instead of destroy if data should flush before close, or wait for
+             * the `'drain'` event before destroying the stream.
+             *
+             * Once `destroy()` has been called any further calls will be a no-op and no
+             * further errors except from `_destroy()` may be emitted as `'error'`.
+             *
+             * Implementors should not override this method,
+             * but instead implement `writable._destroy()`.
+             * @since v8.0.0
+             * @param error Optional, an error to emit with `'error'` event.
+             */
+            destroy(error?: Error): this;
+            /**
+             * Calls `writable.destroy()` with an `AbortError` and returns
+             * a promise that fulfills when the stream is finished.
+             * @since v22.4.0, v20.16.0
+             */
+            [Symbol.asyncDispose](): Promise<void>;
+            // #region InternalEventEmitter
+            addListener<E extends keyof WritableEventMap>(
+                eventName: E,
+                listener: (...args: WritableEventMap[E]) => void,
+            ): this;
+            addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            emit<E extends keyof WritableEventMap>(eventName: E, ...args: WritableEventMap[E]): boolean;
+            emit(eventName: string | symbol, ...args: any[]): boolean;
+            listenerCount<E extends keyof WritableEventMap>(
+                eventName: E,
+                listener?: (...args: WritableEventMap[E]) => void,
+            ): number;
+            listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+            listeners<E extends keyof WritableEventMap>(eventName: E): ((...args: WritableEventMap[E]) => void)[];
+            listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+            off<E extends keyof WritableEventMap>(eventName: E, listener: (...args: WritableEventMap[E]) => void): this;
+            off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            on<E extends keyof WritableEventMap>(eventName: E, listener: (...args: WritableEventMap[E]) => void): this;
+            on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            once<E extends keyof WritableEventMap>(
+                eventName: E,
+                listener: (...args: WritableEventMap[E]) => void,
+            ): this;
+            once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            prependListener<E extends keyof WritableEventMap>(
+                eventName: E,
+                listener: (...args: WritableEventMap[E]) => void,
+            ): this;
+            prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            prependOnceListener<E extends keyof WritableEventMap>(
+                eventName: E,
+                listener: (...args: WritableEventMap[E]) => void,
+            ): this;
+            prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            rawListeners<E extends keyof WritableEventMap>(eventName: E): ((...args: WritableEventMap[E]) => void)[];
+            rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+            // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+            removeAllListeners<E extends keyof WritableEventMap>(eventName?: E): this;
+            removeAllListeners(eventName?: string | symbol): this;
+            removeListener<E extends keyof WritableEventMap>(
+                eventName: E,
+                listener: (...args: WritableEventMap[E]) => void,
+            ): this;
+            removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            // #endregion
+        }
+        interface DuplexOptions<T extends Duplex = Duplex> extends ReadableOptions<T>, WritableOptions<T> {
+            allowHalfOpen?: boolean | undefined;
+            readableObjectMode?: boolean | undefined;
+            writableObjectMode?: boolean | undefined;
+            readableHighWaterMark?: number | undefined;
+            writableHighWaterMark?: number | undefined;
+            writableCorked?: number | undefined;
+        }
+        interface DuplexToWebOptions {
+            type?: web.ReadableStreamType | undefined;
+        }
+        interface DuplexEventMap extends ReadableEventMap, WritableEventMap {}
+        /**
+         * Duplex streams are streams that implement both the `Readable` and `Writable` interfaces.
+         *
+         * Examples of `Duplex` streams include:
+         *
+         * * `TCP sockets`
+         * * `zlib streams`
+         * * `crypto streams`
+         * @since v0.9.4
+         */
+        class Duplex extends Stream implements NodeJS.ReadWriteStream {
+            constructor(options?: DuplexOptions);
+            /**
+             * A utility method for creating duplex streams.
+             *
+             * - `Stream` converts writable stream into writable `Duplex` and readable stream
+             *   to `Duplex`.
+             * - `Blob` converts into readable `Duplex`.
+             * - `string` converts into readable `Duplex`.
+             * - `ArrayBuffer` converts into readable `Duplex`.
+             * - `AsyncIterable` converts into a readable `Duplex`. Cannot yield `null`.
+             * - `AsyncGeneratorFunction` converts into a readable/writable transform
+             *   `Duplex`. Must take a source `AsyncIterable` as first parameter. Cannot yield
+             *   `null`.
+             * - `AsyncFunction` converts into a writable `Duplex`. Must return
+             *   either `null` or `undefined`
+             * - `Object ({ writable, readable })` converts `readable` and
+             *   `writable` into `Stream` and then combines them into `Duplex` where the
+             *   `Duplex` will write to the `writable` and read from the `readable`.
+             * - `Promise` converts into readable `Duplex`. Value `null` is ignored.
+             *
+             * @since v16.8.0
+             */
+            static from(
+                src:
+                    | NodeJS.ReadableStream
+                    | NodeJS.WritableStream
+                    | Blob
+                    | string
+                    | Iterable<any>
+                    | AsyncIterable<any>
+                    | ((source: AsyncIterable<any>) => AsyncIterable<any>)
+                    | ((source: AsyncIterable<any>) => Promise<void>)
+                    | Promise<any>
+                    | web.ReadableWritablePair
+                    | web.ReadableStream
+                    | web.WritableStream,
+            ): Duplex;
+            /**
+             * A utility method for creating a web `ReadableStream` and `WritableStream` from a `Duplex`.
+             * @since v17.0.0
+             */
+            static toWeb(streamDuplex: NodeJS.ReadWriteStream, options?: DuplexToWebOptions): web.ReadableWritablePair;
+            /**
+             * A utility method for creating a `Duplex` from a web `ReadableStream` and `WritableStream`.
+             * @since v17.0.0
+             */
+            static fromWeb(
+                duplexStream: web.ReadableWritablePair,
+                options?: Pick<
+                    DuplexOptions,
+                    "allowHalfOpen" | "decodeStrings" | "encoding" | "highWaterMark" | "objectMode" | "signal"
+                >,
+            ): Duplex;
+            /**
+             * If `false` then the stream will automatically end the writable side when the
+             * readable side ends. Set initially by the `allowHalfOpen` constructor option,
+             * which defaults to `true`.
+             *
+             * This can be changed manually to change the half-open behavior of an existing
+             * `Duplex` stream instance, but must be changed before the `'end'` event is emitted.
+             * @since v0.9.4
+             */
+            allowHalfOpen: boolean;
+            // #region InternalEventEmitter
+            addListener<E extends keyof DuplexEventMap>(
+                eventName: E,
+                listener: (...args: DuplexEventMap[E]) => void,
+            ): this;
+            addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            emit<E extends keyof DuplexEventMap>(eventName: E, ...args: DuplexEventMap[E]): boolean;
+            emit(eventName: string | symbol, ...args: any[]): boolean;
+            listenerCount<E extends keyof DuplexEventMap>(
+                eventName: E,
+                listener?: (...args: DuplexEventMap[E]) => void,
+            ): number;
+            listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+            listeners<E extends keyof DuplexEventMap>(eventName: E): ((...args: DuplexEventMap[E]) => void)[];
+            listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+            off<E extends keyof DuplexEventMap>(eventName: E, listener: (...args: DuplexEventMap[E]) => void): this;
+            off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            on<E extends keyof DuplexEventMap>(eventName: E, listener: (...args: DuplexEventMap[E]) => void): this;
+            on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            once<E extends keyof DuplexEventMap>(eventName: E, listener: (...args: DuplexEventMap[E]) => void): this;
+            once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            prependListener<E extends keyof DuplexEventMap>(
+                eventName: E,
+                listener: (...args: DuplexEventMap[E]) => void,
+            ): this;
+            prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            prependOnceListener<E extends keyof DuplexEventMap>(
+                eventName: E,
+                listener: (...args: DuplexEventMap[E]) => void,
+            ): this;
+            prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            rawListeners<E extends keyof DuplexEventMap>(eventName: E): ((...args: DuplexEventMap[E]) => void)[];
+            rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+            // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+            removeAllListeners<E extends keyof DuplexEventMap>(eventName?: E): this;
+            removeAllListeners(eventName?: string | symbol): this;
+            removeListener<E extends keyof DuplexEventMap>(
+                eventName: E,
+                listener: (...args: DuplexEventMap[E]) => void,
+            ): this;
+            removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            // #endregion
+        }
+        interface Duplex extends Readable, Writable {}
+        /**
+         * The utility function `duplexPair` returns an Array with two items,
+         * each being a `Duplex` stream connected to the other side:
+         *
+         * ```js
+         * const [ sideA, sideB ] = duplexPair();
+         * ```
+         *
+         * Whatever is written to one stream is made readable on the other. It provides
+         * behavior analogous to a network connection, where the data written by the client
+         * becomes readable by the server, and vice-versa.
+         *
+         * The Duplex streams are symmetrical; one or the other may be used without any
+         * difference in behavior.
+         * @param options A value to pass to both {@link Duplex} constructors,
+         * to set options such as buffering.
+         * @since v22.6.0
+         */
+        function duplexPair(options?: DuplexOptions): [Duplex, Duplex];
+        type TransformCallback = (error?: Error | null, data?: any) => void;
+        interface TransformOptions<T extends Transform = Transform> extends DuplexOptions<T> {
+            transform?:
+                | ((this: T, chunk: any, encoding: BufferEncoding, callback: TransformCallback) => void)
+                | undefined;
+            flush?: ((this: T, callback: TransformCallback) => void) | undefined;
+        }
+        /**
+         * Transform streams are `Duplex` streams where the output is in some way
+         * related to the input. Like all `Duplex` streams, `Transform` streams
+         * implement both the `Readable` and `Writable` interfaces.
+         *
+         * Examples of `Transform` streams include:
+         *
+         * * `zlib streams`
+         * * `crypto streams`
+         * @since v0.9.4
+         */
+        class Transform extends Duplex {
+            constructor(options?: TransformOptions);
+            _transform(chunk: any, encoding: BufferEncoding, callback: TransformCallback): void;
+            _flush(callback: TransformCallback): void;
+        }
+        /**
+         * The `stream.PassThrough` class is a trivial implementation of a `Transform` stream that simply passes the input bytes across to the output. Its purpose is
+         * primarily for examples and testing, but there are some use cases where `stream.PassThrough` is useful as a building block for novel sorts of streams.
+         */
+        class PassThrough extends Transform {}
+        /**
+         * A stream to attach a signal to.
+         *
+         * Attaches an AbortSignal to a readable or writeable stream. This lets code
+         * control stream destruction using an `AbortController`.
+         *
+         * Calling `abort` on the `AbortController` corresponding to the passed `AbortSignal` will behave the same way as calling `.destroy(new AbortError())` on the
+         * stream, and `controller.error(new AbortError())` for webstreams.
+         *
+         * ```js
+         * import fs from 'node:fs';
+         *
+         * const controller = new AbortController();
+         * const read = addAbortSignal(
+         *   controller.signal,
+         *   fs.createReadStream(('object.json')),
+         * );
+         * // Later, abort the operation closing the stream
+         * controller.abort();
+         * ```
+         *
+         * Or using an `AbortSignal` with a readable stream as an async iterable:
+         *
+         * ```js
+         * const controller = new AbortController();
+         * setTimeout(() => controller.abort(), 10_000); // set a timeout
+         * const stream = addAbortSignal(
+         *   controller.signal,
+         *   fs.createReadStream(('object.json')),
+         * );
+         * (async () => {
+         *   try {
+         *     for await (const chunk of stream) {
+         *       await process(chunk);
+         *     }
+         *   } catch (e) {
+         *     if (e.name === 'AbortError') {
+         *       // The operation was cancelled
+         *     } else {
+         *       throw e;
+         *     }
+         *   }
+         * })();
+         * ```
+         *
+         * Or using an `AbortSignal` with a ReadableStream:
+         *
+         * ```js
+         * const controller = new AbortController();
+         * const rs = new ReadableStream({
+         *   start(controller) {
+         *     controller.enqueue('hello');
+         *     controller.enqueue('world');
+         *     controller.close();
+         *   },
+         * });
+         *
+         * addAbortSignal(controller.signal, rs);
+         *
+         * finished(rs, (err) => {
+         *   if (err) {
+         *     if (err.name === 'AbortError') {
+         *       // The operation was cancelled
+         *     }
+         *   }
+         * });
+         *
+         * const reader = rs.getReader();
+         *
+         * reader.read().then(({ value, done }) => {
+         *   console.log(value); // hello
+         *   console.log(done); // false
+         *   controller.abort();
+         * });
+         * ```
+         * @since v15.4.0
+         * @param signal A signal representing possible cancellation
+         * @param stream A stream to attach a signal to.
+         */
+        function addAbortSignal<
+            T extends NodeJS.ReadableStream | NodeJS.WritableStream | web.ReadableStream | web.WritableStream,
+        >(signal: AbortSignal, stream: T): T;
+        /**
+         * Returns the default highWaterMark used by streams.
+         * Defaults to `65536` (64 KiB), or `16` for `objectMode`.
+         * @since v19.9.0
+         */
+        function getDefaultHighWaterMark(objectMode: boolean): number;
+        /**
+         * Sets the default highWaterMark used by streams.
+         * @since v19.9.0
+         * @param value highWaterMark value
+         */
+        function setDefaultHighWaterMark(objectMode: boolean, value: number): void;
+        interface FinishedOptions extends Abortable {
+            error?: boolean | undefined;
+            readable?: boolean | undefined;
+            writable?: boolean | undefined;
+        }
+        /**
+         * A readable and/or writable stream/webstream.
+         *
+         * A function to get notified when a stream is no longer readable, writable
+         * or has experienced an error or a premature close event.
+         *
+         * ```js
+         * import { finished } from 'node:stream';
+         * import fs from 'node:fs';
+         *
+         * const rs = fs.createReadStream('archive.tar');
+         *
+         * finished(rs, (err) => {
+         *   if (err) {
+         *     console.error('Stream failed.', err);
+         *   } else {
+         *     console.log('Stream is done reading.');
+         *   }
+         * });
+         *
+         * rs.resume(); // Drain the stream.
+         * ```
+         *
+         * Especially useful in error handling scenarios where a stream is destroyed
+         * prematurely (like an aborted HTTP request), and will not emit `'end'` or `'finish'`.
+         *
+         * The `finished` API provides [`promise version`](https://nodejs.org/docs/latest-v25.x/api/stream.html#streamfinishedstream-options).
+         *
+         * `stream.finished()` leaves dangling event listeners (in particular `'error'`, `'end'`, `'finish'` and `'close'`) after `callback` has been
+         * invoked. The reason for this is so that unexpected `'error'` events (due to
+         * incorrect stream implementations) do not cause unexpected crashes.
+         * If this is unwanted behavior then the returned cleanup function needs to be
+         * invoked in the callback:
+         *
+         * ```js
+         * const cleanup = finished(rs, (err) => {
+         *   cleanup();
+         *   // ...
+         * });
+         * ```
+         * @since v10.0.0
+         * @param stream A readable and/or writable stream.
+         * @param callback A callback function that takes an optional error argument.
+         * @returns A cleanup function which removes all registered listeners.
+         */
+        function finished(
+            stream: NodeJS.ReadableStream | NodeJS.WritableStream | web.ReadableStream | web.WritableStream,
+            options: FinishedOptions,
+            callback: (err?: NodeJS.ErrnoException | null) => void,
+        ): () => void;
+        function finished(
+            stream: NodeJS.ReadableStream | NodeJS.WritableStream | web.ReadableStream | web.WritableStream,
+            callback: (err?: NodeJS.ErrnoException | null) => void,
+        ): () => void;
+        namespace finished {
+            import __promisify__ = promises.finished;
+            export { __promisify__ };
+        }
+        type PipelineSourceFunction<O> = (options?: Abortable) => Iterable<O> | AsyncIterable<O>;
+        type PipelineSource<O> =
+            | NodeJS.ReadableStream
+            | web.ReadableStream<O>
+            | web.TransformStream<any, O>
+            | Iterable<O>
+            | AsyncIterable<O>
+            | PipelineSourceFunction<O>;
+        type PipelineSourceArgument<T> = (T extends (...args: any[]) => infer R ? R : T) extends infer S
+            ? S extends web.TransformStream<any, infer O> ? web.ReadableStream<O> : S
+            : never;
+        type PipelineTransformGenerator<S extends PipelineTransformSource<any>, O> = (
+            source: PipelineSourceArgument<S>,
+            options?: Abortable,
+        ) => AsyncIterable<O>;
+        type PipelineTransformStreams<I, O> =
+            | NodeJS.ReadWriteStream
+            | web.TransformStream<I, O>;
+        type PipelineTransform<S extends PipelineTransformSource<any>, O> = S extends
+            PipelineSource<infer I> | PipelineTransformStreams<any, infer I> | ((...args: any[]) => infer I)
+            ? PipelineTransformStreams<I, O> | PipelineTransformGenerator<S, O>
+            : never;
+        type PipelineTransformSource<O> = PipelineSource<O> | PipelineTransform<any, O>;
+        type PipelineDestinationFunction<S extends PipelineTransformSource<any>, R> = (
+            source: PipelineSourceArgument<S>,
+            options?: Abortable,
+        ) => R;
+        type PipelineDestination<S extends PipelineTransformSource<any>, R> = S extends
+            PipelineSource<infer I> | PipelineTransform<any, infer I> ?
+                | NodeJS.WritableStream
+                | web.WritableStream<I>
+                | web.TransformStream<I, any>
+                | PipelineDestinationFunction<S, R>
+            : never;
+        type PipelineCallback<S extends PipelineDestination<any, any>> = (
+            err: NodeJS.ErrnoException | null,
+            value: S extends (...args: any[]) => PromiseLike<infer R> ? R : undefined,
+        ) => void;
+        type PipelineResult<S extends PipelineDestination<any, any>> = S extends NodeJS.WritableStream ? S : Duplex;
+        /**
+         * A module method to pipe between streams and generators forwarding errors and
+         * properly cleaning up and provide a callback when the pipeline is complete.
+         *
+         * ```js
+         * import { pipeline } from 'node:stream';
+         * import fs from 'node:fs';
+         * import zlib from 'node:zlib';
+         *
+         * // Use the pipeline API to easily pipe a series of streams
+         * // together and get notified when the pipeline is fully done.
+         *
+         * // A pipeline to gzip a potentially huge tar file efficiently:
+         *
+         * pipeline(
+         *   fs.createReadStream('archive.tar'),
+         *   zlib.createGzip(),
+         *   fs.createWriteStream('archive.tar.gz'),
+         *   (err) => {
+         *     if (err) {
+         *       console.error('Pipeline failed.', err);
+         *     } else {
+         *       console.log('Pipeline succeeded.');
+         *     }
+         *   },
+         * );
+         * ```
+         *
+         * The `pipeline` API provides a [`promise version`](https://nodejs.org/docs/latest-v25.x/api/stream.html#streampipelinesource-transforms-destination-options).
+         *
+         * `stream.pipeline()` will call `stream.destroy(err)` on all streams except:
+         *
+         * * `Readable` streams which have emitted `'end'` or `'close'`.
+         * * `Writable` streams which have emitted `'finish'` or `'close'`.
+         *
+         * `stream.pipeline()` leaves dangling event listeners on the streams
+         * after the `callback` has been invoked. In the case of reuse of streams after
+         * failure, this can cause event listener leaks and swallowed errors. If the last
+         * stream is readable, dangling event listeners will be removed so that the last
+         * stream can be consumed later.
+         *
+         * `stream.pipeline()` closes all the streams when an error is raised.
+         * The `IncomingRequest` usage with `pipeline` could lead to an unexpected behavior
+         * once it would destroy the socket without sending the expected response.
+         * See the example below:
+         *
+         * ```js
+         * import fs from 'node:fs';
+         * import http from 'node:http';
+         * import { pipeline } from 'node:stream';
+         *
+         * const server = http.createServer((req, res) => {
+         *   const fileStream = fs.createReadStream('./fileNotExist.txt');
+         *   pipeline(fileStream, res, (err) => {
+         *     if (err) {
+         *       console.log(err); // No such file
+         *       // this message can't be sent once `pipeline` already destroyed the socket
+         *       return res.end('error!!!');
+         *     }
+         *   });
+         * });
+         * ```
+         * @since v10.0.0
+         * @param callback Called when the pipeline is fully done.
+         */
+        function pipeline<S extends PipelineSource<any>, D extends PipelineDestination<S, any>>(
+            source: S,
+            destination: D,
+            callback: PipelineCallback<D>,
+        ): PipelineResult<D>;
+        function pipeline<
+            S extends PipelineSource<any>,
+            T extends PipelineTransform<S, any>,
+            D extends PipelineDestination<T, any>,
+        >(
+            source: S,
+            transform: T,
+            destination: D,
+            callback: PipelineCallback<D>,
+        ): PipelineResult<D>;
+        function pipeline<
+            S extends PipelineSource<any>,
+            T1 extends PipelineTransform<S, any>,
+            T2 extends PipelineTransform<T1, any>,
+            D extends PipelineDestination<T2, any>,
+        >(
+            source: S,
+            transform1: T1,
+            transform2: T2,
+            destination: D,
+            callback: PipelineCallback<D>,
+        ): PipelineResult<D>;
+        function pipeline<
+            S extends PipelineSource<any>,
+            T1 extends PipelineTransform<S, any>,
+            T2 extends PipelineTransform<T1, any>,
+            T3 extends PipelineTransform<T2, any>,
+            D extends PipelineDestination<T3, any>,
+        >(
+            source: S,
+            transform1: T1,
+            transform2: T2,
+            transform3: T3,
+            destination: D,
+            callback: PipelineCallback<D>,
+        ): PipelineResult<D>;
+        function pipeline<
+            S extends PipelineSource<any>,
+            T1 extends PipelineTransform<S, any>,
+            T2 extends PipelineTransform<T1, any>,
+            T3 extends PipelineTransform<T2, any>,
+            T4 extends PipelineTransform<T3, any>,
+            D extends PipelineDestination<T4, any>,
+        >(
+            source: S,
+            transform1: T1,
+            transform2: T2,
+            transform3: T3,
+            transform4: T4,
+            destination: D,
+            callback: PipelineCallback<D>,
+        ): PipelineResult<D>;
+        function pipeline(
+            streams: ReadonlyArray<PipelineSource<any> | PipelineTransform<any, any> | PipelineDestination<any, any>>,
+            callback: (err: NodeJS.ErrnoException | null) => void,
+        ): NodeJS.WritableStream;
+        function pipeline(
+            ...streams: [
+                ...[PipelineSource<any>, ...PipelineTransform<any, any>[], PipelineDestination<any, any>],
+                callback: ((err: NodeJS.ErrnoException | null) => void),
+            ]
+        ): NodeJS.WritableStream;
+        namespace pipeline {
+            import __promisify__ = promises.pipeline;
+            export { __promisify__ };
+        }
+        type ComposeSource<O> =
+            | NodeJS.ReadableStream
+            | web.ReadableStream<O>
+            | Iterable<O>
+            | AsyncIterable<O>
+            | (() => AsyncIterable<O>);
+        type ComposeTransformStreams<I, O> = NodeJS.ReadWriteStream | web.TransformStream<I, O>;
+        type ComposeTransformGenerator<I, O> = (source: AsyncIterable<I>) => AsyncIterable<O>;
+        type ComposeTransform<S extends ComposeTransformSource<any>, O> = S extends
+            ComposeSource<infer I> | ComposeTransformStreams<any, infer I> | ComposeTransformGenerator<any, infer I>
+            ? ComposeTransformStreams<I, O> | ComposeTransformGenerator<I, O>
+            : never;
+        type ComposeTransformSource<O> = ComposeSource<O> | ComposeTransform<any, O>;
+        type ComposeDestination<S extends ComposeTransformSource<any>> = S extends ComposeTransformSource<infer I> ?
+                | NodeJS.WritableStream
+                | web.WritableStream<I>
+                | web.TransformStream<I, any>
+                | ((source: AsyncIterable<I>) => void)
+            : never;
+        /**
+         * Combines two or more streams into a `Duplex` stream that writes to the
+         * first stream and reads from the last. Each provided stream is piped into
+         * the next, using `stream.pipeline`. If any of the streams error then all
+         * are destroyed, including the outer `Duplex` stream.
+         *
+         * Because `stream.compose` returns a new stream that in turn can (and
+         * should) be piped into other streams, it enables composition. In contrast,
+         * when passing streams to `stream.pipeline`, typically the first stream is
+         * a readable stream and the last a writable stream, forming a closed
+         * circuit.
+         *
+         * If passed a `Function` it must be a factory method taking a `source`
+         * `Iterable`.
+         *
+         * ```js
+         * import { compose, Transform } from 'node:stream';
+         *
+         * const removeSpaces = new Transform({
+         *   transform(chunk, encoding, callback) {
+         *     callback(null, String(chunk).replace(' ', ''));
+         *   },
+         * });
+         *
+         * async function* toUpper(source) {
+         *   for await (const chunk of source) {
+         *     yield String(chunk).toUpperCase();
+         *   }
+         * }
+         *
+         * let res = '';
+         * for await (const buf of compose(removeSpaces, toUpper).end('hello world')) {
+         *   res += buf;
+         * }
+         *
+         * console.log(res); // prints 'HELLOWORLD'
+         * ```
+         *
+         * `stream.compose` can be used to convert async iterables, generators and
+         * functions into streams.
+         *
+         * * `AsyncIterable` converts into a readable `Duplex`. Cannot yield
+         *   `null`.
+         * * `AsyncGeneratorFunction` converts into a readable/writable transform `Duplex`.
+         *   Must take a source `AsyncIterable` as first parameter. Cannot yield
+         *   `null`.
+         * * `AsyncFunction` converts into a writable `Duplex`. Must return
+         *   either `null` or `undefined`.
+         *
+         * ```js
+         * import { compose } from 'node:stream';
+         * import { finished } from 'node:stream/promises';
+         *
+         * // Convert AsyncIterable into readable Duplex.
+         * const s1 = compose(async function*() {
+         *   yield 'Hello';
+         *   yield 'World';
+         * }());
+         *
+         * // Convert AsyncGenerator into transform Duplex.
+         * const s2 = compose(async function*(source) {
+         *   for await (const chunk of source) {
+         *     yield String(chunk).toUpperCase();
+         *   }
+         * });
+         *
+         * let res = '';
+         *
+         * // Convert AsyncFunction into writable Duplex.
+         * const s3 = compose(async function(source) {
+         *   for await (const chunk of source) {
+         *     res += chunk;
+         *   }
+         * });
+         *
+         * await finished(compose(s1, s2, s3));
+         *
+         * console.log(res); // prints 'HELLOWORLD'
+         * ```
+         *
+         * For convenience, the `readable.compose(stream)` method is available on
+         * `Readable` and `Duplex` streams as a wrapper for this function.
+         * @since v16.9.0
+         * @experimental
+         */
+        /* eslint-disable @definitelytyped/no-unnecessary-generics */
+        function compose(stream: ComposeSource<any> | ComposeDestination<any>): Duplex;
+        function compose<
+            S extends ComposeSource<any> | ComposeTransform<any, any>,
+            D extends ComposeTransform<S, any> | ComposeDestination<S>,
+        >(
+            source: S,
+            destination: D,
+        ): Duplex;
+        function compose<
+            S extends ComposeSource<any> | ComposeTransform<any, any>,
+            T extends ComposeTransform<S, any>,
+            D extends ComposeTransform<T, any> | ComposeDestination<T>,
+        >(source: S, transform: T, destination: D): Duplex;
+        function compose<
+            S extends ComposeSource<any> | ComposeTransform<any, any>,
+            T1 extends ComposeTransform<S, any>,
+            T2 extends ComposeTransform<T1, any>,
+            D extends ComposeTransform<T2, any> | ComposeDestination<T2>,
+        >(source: S, transform1: T1, transform2: T2, destination: D): Duplex;
+        function compose<
+            S extends ComposeSource<any> | ComposeTransform<any, any>,
+            T1 extends ComposeTransform<S, any>,
+            T2 extends ComposeTransform<T1, any>,
+            T3 extends ComposeTransform<T2, any>,
+            D extends ComposeTransform<T3, any> | ComposeDestination<T3>,
+        >(source: S, transform1: T1, transform2: T2, transform3: T3, destination: D): Duplex;
+        function compose<
+            S extends ComposeSource<any> | ComposeTransform<any, any>,
+            T1 extends ComposeTransform<S, any>,
+            T2 extends ComposeTransform<T1, any>,
+            T3 extends ComposeTransform<T2, any>,
+            T4 extends ComposeTransform<T3, any>,
+            D extends ComposeTransform<T4, any> | ComposeDestination<T4>,
+        >(source: S, transform1: T1, transform2: T2, transform3: T3, transform4: T4, destination: D): Duplex;
+        function compose(
+            ...streams: [
+                ComposeSource<any>,
+                ...ComposeTransform<any, any>[],
+                ComposeDestination<any>,
+            ]
+        ): Duplex;
+        /* eslint-enable @definitelytyped/no-unnecessary-generics */
+        /**
+         * Returns whether the stream has encountered an error.
+         * @since v17.3.0, v16.14.0
+         */
+        function isErrored(
+            stream: NodeJS.ReadableStream | NodeJS.WritableStream | web.ReadableStream | web.WritableStream,
+        ): boolean;
+        /**
+         * Returns whether the stream is readable.
+         * @since v17.4.0, v16.14.0
+         * @returns Only returns `null` if `stream` is not a valid `Readable`, `Duplex` or `ReadableStream`.
+         */
+        function isReadable(stream: NodeJS.ReadableStream | web.ReadableStream): boolean | null;
+        /**
+         * Returns whether the stream is writable.
+         * @since v20.0.0
+         * @returns Only returns `null` if `stream` is not a valid `Writable`, `Duplex` or `WritableStream`.
+         */
+        function isWritable(stream: NodeJS.WritableStream | web.WritableStream): boolean | null;
+    }
+    global {
+        namespace NodeJS {
+            // These interfaces are vestigial, and correspond roughly to the "streams2" interfaces
+            // from early versions of Node.js, but they are still used widely across the ecosystem.
+            // Accordingly, they are commonly used as "in-types" for @types/node APIs, so that
+            // eg. streams returned from older libraries will still be considered valid input to
+            // functions which accept stream arguments.
+            // It's not possible to change or remove these without astronomical levels of breakage.
+            interface ReadableStream extends EventEmitter {
+                readable: boolean;
+                read(size?: number): string | Buffer;
+                setEncoding(encoding: BufferEncoding): this;
+                pause(): this;
+                resume(): this;
+                isPaused(): boolean;
+                pipe<T extends WritableStream>(destination: T, options?: { end?: boolean | undefined }): T;
+                unpipe(destination?: WritableStream): this;
+                unshift(chunk: string | Uint8Array, encoding?: BufferEncoding): void;
+                wrap(oldStream: ReadableStream): this;
+                [Symbol.asyncIterator](): AsyncIterableIterator<string | Buffer>;
+            }
+            interface WritableStream extends EventEmitter {
+                writable: boolean;
+                write(buffer: Uint8Array | string, cb?: (err?: Error | null) => void): boolean;
+                write(str: string, encoding?: BufferEncoding, cb?: (err?: Error | null) => void): boolean;
+                end(cb?: () => void): this;
+                end(data: string | Uint8Array, cb?: () => void): this;
+                end(str: string, encoding?: BufferEncoding, cb?: () => void): this;
+            }
+            interface ReadWriteStream extends ReadableStream, WritableStream {}
+        }
+    }
+    export = Stream;
+}
+declare module "stream" {
+    import stream = require("node:stream");
+    export = stream;
+}
diff --git a/mqtt-backend/node_modules/@types/node/stream/consumers.d.ts b/mqtt-backend/node_modules/@types/node/stream/consumers.d.ts
new file mode 100644
index 0000000..27a474c
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/stream/consumers.d.ts
@@ -0,0 +1,114 @@
+declare module "node:stream/consumers" {
+    import { Blob, NonSharedBuffer } from "node:buffer";
+    import { ReadableStream } from "node:stream/web";
+    /**
+     * ```js
+     * import { arrayBuffer } from 'node:stream/consumers';
+     * import { Readable } from 'node:stream';
+     * import { TextEncoder } from 'node:util';
+     *
+     * const encoder = new TextEncoder();
+     * const dataArray = encoder.encode('hello world from consumers!');
+     *
+     * const readable = Readable.from(dataArray);
+     * const data = await arrayBuffer(readable);
+     * console.log(`from readable: ${data.byteLength}`);
+     * // Prints: from readable: 76
+     * ```
+     * @since v16.7.0
+     * @returns Fulfills with an `ArrayBuffer` containing the full contents of the stream.
+     */
+    function arrayBuffer(stream: ReadableStream | NodeJS.ReadableStream | AsyncIterable<any>): Promise<ArrayBuffer>;
+    /**
+     * ```js
+     * import { blob } from 'node:stream/consumers';
+     *
+     * const dataBlob = new Blob(['hello world from consumers!']);
+     *
+     * const readable = dataBlob.stream();
+     * const data = await blob(readable);
+     * console.log(`from readable: ${data.size}`);
+     * // Prints: from readable: 27
+     * ```
+     * @since v16.7.0
+     * @returns Fulfills with a `Blob` containing the full contents of the stream.
+     */
+    function blob(stream: ReadableStream | NodeJS.ReadableStream | AsyncIterable<any>): Promise<Blob>;
+    /**
+     * ```js
+     * import { buffer } from 'node:stream/consumers';
+     * import { Readable } from 'node:stream';
+     * import { Buffer } from 'node:buffer';
+     *
+     * const dataBuffer = Buffer.from('hello world from consumers!');
+     *
+     * const readable = Readable.from(dataBuffer);
+     * const data = await buffer(readable);
+     * console.log(`from readable: ${data.length}`);
+     * // Prints: from readable: 27
+     * ```
+     * @since v16.7.0
+     * @returns Fulfills with a `Buffer` containing the full contents of the stream.
+     */
+    function buffer(stream: ReadableStream | NodeJS.ReadableStream | AsyncIterable<any>): Promise<NonSharedBuffer>;
+    /**
+     * ```js
+     * import { bytes } from 'node:stream/consumers';
+     * import { Readable } from 'node:stream';
+     * import { Buffer } from 'node:buffer';
+     *
+     * const dataBuffer = Buffer.from('hello world from consumers!');
+     *
+     * const readable = Readable.from(dataBuffer);
+     * const data = await bytes(readable);
+     * console.log(`from readable: ${data.length}`);
+     * // Prints: from readable: 27
+     * ```
+     * @since v25.6.0
+     * @returns Fulfills with a `Uint8Array` containing the full contents of the stream.
+     */
+    function bytes(
+        stream: ReadableStream | NodeJS.ReadableStream | AsyncIterable<any>,
+    ): Promise<NodeJS.NonSharedUint8Array>;
+    /**
+     * ```js
+     * import { json } from 'node:stream/consumers';
+     * import { Readable } from 'node:stream';
+     *
+     * const items = Array.from(
+     *   {
+     *     length: 100,
+     *   },
+     *   () => ({
+     *     message: 'hello world from consumers!',
+     *   }),
+     * );
+     *
+     * const readable = Readable.from(JSON.stringify(items));
+     * const data = await json(readable);
+     * console.log(`from readable: ${data.length}`);
+     * // Prints: from readable: 100
+     * ```
+     * @since v16.7.0
+     * @returns Fulfills with the contents of the stream parsed as a
+     * UTF-8 encoded string that is then passed through `JSON.parse()`.
+     */
+    function json(stream: ReadableStream | NodeJS.ReadableStream | AsyncIterable<any>): Promise<unknown>;
+    /**
+     * ```js
+     * import { text } from 'node:stream/consumers';
+     * import { Readable } from 'node:stream';
+     *
+     * const readable = Readable.from('Hello world from consumers!');
+     * const data = await text(readable);
+     * console.log(`from readable: ${data.length}`);
+     * // Prints: from readable: 27
+     * ```
+     * @since v16.7.0
+     * @returns Fulfills with the contents of the stream parsed as a UTF-8 encoded string.
+     */
+    function text(stream: ReadableStream | NodeJS.ReadableStream | AsyncIterable<any>): Promise<string>;
+}
+declare module "stream/consumers" {
+    export * from "node:stream/consumers";
+}
diff --git a/mqtt-backend/node_modules/@types/node/stream/promises.d.ts b/mqtt-backend/node_modules/@types/node/stream/promises.d.ts
new file mode 100644
index 0000000..c4bd3ea
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/stream/promises.d.ts
@@ -0,0 +1,211 @@
+declare module "node:stream/promises" {
+    import { Abortable } from "node:events";
+    import {
+        FinishedOptions as _FinishedOptions,
+        PipelineDestination,
+        PipelineSource,
+        PipelineTransform,
+    } from "node:stream";
+    import { ReadableStream, WritableStream } from "node:stream/web";
+    interface FinishedOptions extends _FinishedOptions {
+        /**
+         * If true, removes the listeners registered by this function before the promise is fulfilled.
+         * @default false
+         */
+        cleanup?: boolean | undefined;
+    }
+    /**
+     * ```js
+     * import { finished } from 'node:stream/promises';
+     * import { createReadStream } from 'node:fs';
+     *
+     * const rs = createReadStream('archive.tar');
+     *
+     * async function run() {
+     *   await finished(rs);
+     *   console.log('Stream is done reading.');
+     * }
+     *
+     * run().catch(console.error);
+     * rs.resume(); // Drain the stream.
+     * ```
+     *
+     * The `finished` API also provides a [callback version](https://nodejs.org/docs/latest-v25.x/api/stream.html#streamfinishedstream-options-callback).
+     *
+     * `stream.finished()` leaves dangling event listeners (in particular
+     * `'error'`, `'end'`, `'finish'` and `'close'`) after the returned promise is
+     * resolved or rejected. The reason for this is so that unexpected `'error'`
+     * events (due to incorrect stream implementations) do not cause unexpected
+     * crashes. If this is unwanted behavior then `options.cleanup` should be set to
+     * `true`:
+     *
+     * ```js
+     * await finished(rs, { cleanup: true });
+     * ```
+     * @since v15.0.0
+     * @returns Fulfills when the stream is no longer readable or writable.
+     */
+    function finished(
+        stream: NodeJS.ReadableStream | NodeJS.WritableStream | ReadableStream | WritableStream,
+        options?: FinishedOptions,
+    ): Promise<void>;
+    interface PipelineOptions extends Abortable {
+        end?: boolean | undefined;
+    }
+    type PipelineResult<S extends PipelineDestination<any, any>> = S extends (...args: any[]) => PromiseLike<infer R>
+        ? Promise<R>
+        : Promise<void>;
+    /**
+     * ```js
+     * import { pipeline } from 'node:stream/promises';
+     * import { createReadStream, createWriteStream } from 'node:fs';
+     * import { createGzip } from 'node:zlib';
+     *
+     * await pipeline(
+     *   createReadStream('archive.tar'),
+     *   createGzip(),
+     *   createWriteStream('archive.tar.gz'),
+     * );
+     * console.log('Pipeline succeeded.');
+     * ```
+     *
+     * To use an `AbortSignal`, pass it inside an options object, as the last argument.
+     * When the signal is aborted, `destroy` will be called on the underlying pipeline,
+     * with an `AbortError`.
+     *
+     * ```js
+     * import { pipeline } from 'node:stream/promises';
+     * import { createReadStream, createWriteStream } from 'node:fs';
+     * import { createGzip } from 'node:zlib';
+     *
+     * const ac = new AbortController();
+     * const { signal } = ac;
+     * setImmediate(() => ac.abort());
+     * try {
+     *   await pipeline(
+     *     createReadStream('archive.tar'),
+     *     createGzip(),
+     *     createWriteStream('archive.tar.gz'),
+     *     { signal },
+     *   );
+     * } catch (err) {
+     *   console.error(err); // AbortError
+     * }
+     * ```
+     *
+     * The `pipeline` API also supports async generators:
+     *
+     * ```js
+     * import { pipeline } from 'node:stream/promises';
+     * import { createReadStream, createWriteStream } from 'node:fs';
+     *
+     * await pipeline(
+     *   createReadStream('lowercase.txt'),
+     *   async function* (source, { signal }) {
+     *     source.setEncoding('utf8');  // Work with strings rather than `Buffer`s.
+     *     for await (const chunk of source) {
+     *       yield await processChunk(chunk, { signal });
+     *     }
+     *   },
+     *   createWriteStream('uppercase.txt'),
+     * );
+     * console.log('Pipeline succeeded.');
+     * ```
+     *
+     * Remember to handle the `signal` argument passed into the async generator.
+     * Especially in the case where the async generator is the source for the
+     * pipeline (i.e. first argument) or the pipeline will never complete.
+     *
+     * ```js
+     * import { pipeline } from 'node:stream/promises';
+     * import fs from 'node:fs';
+     * await pipeline(
+     *   async function* ({ signal }) {
+     *     await someLongRunningfn({ signal });
+     *     yield 'asd';
+     *   },
+     *   fs.createWriteStream('uppercase.txt'),
+     * );
+     * console.log('Pipeline succeeded.');
+     * ```
+     *
+     * The `pipeline` API provides [callback version](https://nodejs.org/docs/latest-v25.x/api/stream.html#streampipelinesource-transforms-destination-callback):
+     * @since v15.0.0
+     * @returns Fulfills when the pipeline is complete.
+     */
+    function pipeline<A extends PipelineSource<any>, B extends PipelineDestination<A, any>>(
+        source: A,
+        destination: B,
+        options?: PipelineOptions,
+    ): PipelineResult<B>;
+    function pipeline<
+        A extends PipelineSource<any>,
+        T1 extends PipelineTransform<A, any>,
+        B extends PipelineDestination<T1, any>,
+    >(
+        source: A,
+        transform1: T1,
+        destination: B,
+        options?: PipelineOptions,
+    ): PipelineResult<B>;
+    function pipeline<
+        A extends PipelineSource<any>,
+        T1 extends PipelineTransform<A, any>,
+        T2 extends PipelineTransform<T1, any>,
+        B extends PipelineDestination<T2, any>,
+    >(
+        source: A,
+        transform1: T1,
+        transform2: T2,
+        destination: B,
+        options?: PipelineOptions,
+    ): PipelineResult<B>;
+    function pipeline<
+        A extends PipelineSource<any>,
+        T1 extends PipelineTransform<A, any>,
+        T2 extends PipelineTransform<T1, any>,
+        T3 extends PipelineTransform<T2, any>,
+        B extends PipelineDestination<T3, any>,
+    >(
+        source: A,
+        transform1: T1,
+        transform2: T2,
+        transform3: T3,
+        destination: B,
+        options?: PipelineOptions,
+    ): PipelineResult<B>;
+    function pipeline<
+        A extends PipelineSource<any>,
+        T1 extends PipelineTransform<A, any>,
+        T2 extends PipelineTransform<T1, any>,
+        T3 extends PipelineTransform<T2, any>,
+        T4 extends PipelineTransform<T3, any>,
+        B extends PipelineDestination<T4, any>,
+    >(
+        source: A,
+        transform1: T1,
+        transform2: T2,
+        transform3: T3,
+        transform4: T4,
+        destination: B,
+        options?: PipelineOptions,
+    ): PipelineResult<B>;
+    function pipeline(
+        streams: readonly [PipelineSource<any>, ...PipelineTransform<any, any>[], PipelineDestination<any, any>],
+        options?: PipelineOptions,
+    ): Promise<void>;
+    function pipeline(
+        ...streams: [PipelineSource<any>, ...PipelineTransform<any, any>[], PipelineDestination<any, any>]
+    ): Promise<void>;
+    function pipeline(
+        ...streams: [
+            PipelineSource<any>,
+            ...PipelineTransform<any, any>[],
+            PipelineDestination<any, any>,
+            options: PipelineOptions,
+        ]
+    ): Promise<void>;
+}
+declare module "stream/promises" {
+    export * from "node:stream/promises";
+}
diff --git a/mqtt-backend/node_modules/@types/node/stream/web.d.ts b/mqtt-backend/node_modules/@types/node/stream/web.d.ts
new file mode 100644
index 0000000..13d55a0
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/stream/web.d.ts
@@ -0,0 +1,296 @@
+declare module "node:stream/web" {
+    import { TextDecoderCommon, TextDecoderOptions, TextEncoderCommon } from "node:util";
+    type CompressionFormat = "brotli" | "deflate" | "deflate-raw" | "gzip";
+    type ReadableStreamController<T> = ReadableStreamDefaultController<T> | ReadableByteStreamController;
+    type ReadableStreamReader<T> = ReadableStreamDefaultReader<T> | ReadableStreamBYOBReader;
+    type ReadableStreamReaderMode = "byob";
+    type ReadableStreamReadResult<T> = ReadableStreamReadValueResult<T> | ReadableStreamReadDoneResult<T>;
+    type ReadableStreamType = "bytes";
+    interface GenericTransformStream {
+        readonly readable: ReadableStream;
+        readonly writable: WritableStream;
+    }
+    interface QueuingStrategy<T = any> {
+        highWaterMark?: number;
+        size?: QueuingStrategySize<T>;
+    }
+    interface QueuingStrategyInit {
+        highWaterMark: number;
+    }
+    interface QueuingStrategySize<T = any> {
+        (chunk: T): number;
+    }
+    interface ReadableStreamBYOBReaderReadOptions {
+        min?: number;
+    }
+    interface ReadableStreamGenericReader {
+        readonly closed: Promise<void>;
+        cancel(reason?: any): Promise<void>;
+    }
+    interface ReadableStreamGetReaderOptions {
+        mode?: ReadableStreamReaderMode;
+    }
+    interface ReadableStreamIteratorOptions {
+        preventCancel?: boolean;
+    }
+    interface ReadableStreamReadDoneResult<T> {
+        done: true;
+        value: T | undefined;
+    }
+    interface ReadableStreamReadValueResult<T> {
+        done: false;
+        value: T;
+    }
+    interface ReadableWritablePair<R = any, W = any> {
+        readable: ReadableStream<R>;
+        writable: WritableStream<W>;
+    }
+    interface StreamPipeOptions {
+        preventAbort?: boolean;
+        preventCancel?: boolean;
+        preventClose?: boolean;
+        signal?: AbortSignal;
+    }
+    interface Transformer<I = any, O = any> {
+        flush?: TransformerFlushCallback<O>;
+        readableType?: undefined;
+        start?: TransformerStartCallback<O>;
+        transform?: TransformerTransformCallback<I, O>;
+        writableType?: undefined;
+    }
+    interface TransformerFlushCallback<O> {
+        (controller: TransformStreamDefaultController<O>): void | PromiseLike<void>;
+    }
+    interface TransformerStartCallback<O> {
+        (controller: TransformStreamDefaultController<O>): any;
+    }
+    interface TransformerTransformCallback<I, O> {
+        (chunk: I, controller: TransformStreamDefaultController<O>): void | PromiseLike<void>;
+    }
+    interface UnderlyingByteSource {
+        autoAllocateChunkSize?: number;
+        cancel?: UnderlyingSourceCancelCallback;
+        pull?: (controller: ReadableByteStreamController) => void | PromiseLike<void>;
+        start?: (controller: ReadableByteStreamController) => any;
+        type: "bytes";
+    }
+    interface UnderlyingDefaultSource<R = any> {
+        cancel?: UnderlyingSourceCancelCallback;
+        pull?: (controller: ReadableStreamDefaultController<R>) => void | PromiseLike<void>;
+        start?: (controller: ReadableStreamDefaultController<R>) => any;
+        type?: undefined;
+    }
+    interface UnderlyingSink<W = any> {
+        abort?: UnderlyingSinkAbortCallback;
+        close?: UnderlyingSinkCloseCallback;
+        start?: UnderlyingSinkStartCallback;
+        type?: undefined;
+        write?: UnderlyingSinkWriteCallback<W>;
+    }
+    interface UnderlyingSinkAbortCallback {
+        (reason?: any): void | PromiseLike<void>;
+    }
+    interface UnderlyingSinkCloseCallback {
+        (): void | PromiseLike<void>;
+    }
+    interface UnderlyingSinkStartCallback {
+        (controller: WritableStreamDefaultController): any;
+    }
+    interface UnderlyingSinkWriteCallback<W> {
+        (chunk: W, controller: WritableStreamDefaultController): void | PromiseLike<void>;
+    }
+    interface UnderlyingSource<R = any> {
+        autoAllocateChunkSize?: number;
+        cancel?: UnderlyingSourceCancelCallback;
+        pull?: UnderlyingSourcePullCallback<R>;
+        start?: UnderlyingSourceStartCallback<R>;
+        type?: ReadableStreamType;
+    }
+    interface UnderlyingSourceCancelCallback {
+        (reason?: any): void | PromiseLike<void>;
+    }
+    interface UnderlyingSourcePullCallback<R> {
+        (controller: ReadableStreamController<R>): void | PromiseLike<void>;
+    }
+    interface UnderlyingSourceStartCallback<R> {
+        (controller: ReadableStreamController<R>): any;
+    }
+    interface ByteLengthQueuingStrategy extends QueuingStrategy<NodeJS.ArrayBufferView> {
+        readonly highWaterMark: number;
+        readonly size: QueuingStrategySize<NodeJS.ArrayBufferView>;
+    }
+    var ByteLengthQueuingStrategy: {
+        prototype: ByteLengthQueuingStrategy;
+        new(init: QueuingStrategyInit): ByteLengthQueuingStrategy;
+    };
+    interface CompressionStream extends GenericTransformStream {
+        readonly readable: ReadableStream<NodeJS.NonSharedUint8Array>;
+        readonly writable: WritableStream<NodeJS.BufferSource>;
+    }
+    var CompressionStream: {
+        prototype: CompressionStream;
+        new(format: CompressionFormat): CompressionStream;
+    };
+    interface CountQueuingStrategy extends QueuingStrategy {
+        readonly highWaterMark: number;
+        readonly size: QueuingStrategySize;
+    }
+    var CountQueuingStrategy: {
+        prototype: CountQueuingStrategy;
+        new(init: QueuingStrategyInit): CountQueuingStrategy;
+    };
+    interface DecompressionStream extends GenericTransformStream {
+        readonly readable: ReadableStream<NodeJS.NonSharedUint8Array>;
+        readonly writable: WritableStream<NodeJS.BufferSource>;
+    }
+    var DecompressionStream: {
+        prototype: DecompressionStream;
+        new(format: CompressionFormat): DecompressionStream;
+    };
+    interface ReadableByteStreamController {
+        readonly byobRequest: ReadableStreamBYOBRequest | null;
+        readonly desiredSize: number | null;
+        close(): void;
+        enqueue(chunk: NodeJS.NonSharedArrayBufferView): void;
+        error(e?: any): void;
+    }
+    var ReadableByteStreamController: {
+        prototype: ReadableByteStreamController;
+        new(): ReadableByteStreamController;
+    };
+    interface ReadableStream<R = any> {
+        readonly locked: boolean;
+        cancel(reason?: any): Promise<void>;
+        getReader(options: { mode: "byob" }): ReadableStreamBYOBReader;
+        getReader(): ReadableStreamDefaultReader<R>;
+        getReader(options?: ReadableStreamGetReaderOptions): ReadableStreamReader<R>;
+        pipeThrough<T>(transform: ReadableWritablePair<T, R>, options?: StreamPipeOptions): ReadableStream<T>;
+        pipeTo(destination: WritableStream<R>, options?: StreamPipeOptions): Promise<void>;
+        tee(): [ReadableStream<R>, ReadableStream<R>];
+        [Symbol.asyncIterator](options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator<R>;
+        values(options?: ReadableStreamIteratorOptions): ReadableStreamAsyncIterator<R>;
+    }
+    var ReadableStream: {
+        prototype: ReadableStream;
+        new(
+            underlyingSource: UnderlyingByteSource,
+            strategy?: { highWaterMark?: number },
+        ): ReadableStream<NodeJS.NonSharedUint8Array>;
+        new<R = any>(underlyingSource: UnderlyingDefaultSource<R>, strategy?: QueuingStrategy<R>): ReadableStream<R>;
+        new<R = any>(underlyingSource?: UnderlyingSource<R>, strategy?: QueuingStrategy<R>): ReadableStream<R>;
+        from<R = any>(iterable: Iterable<R> | AsyncIterable<R>): ReadableStream<R>;
+    };
+    interface ReadableStreamAsyncIterator<T> extends NodeJS.AsyncIterator<T, NodeJS.BuiltinIteratorReturn, unknown> {
+        [Symbol.asyncIterator](): ReadableStreamAsyncIterator<T>;
+    }
+    interface ReadableStreamBYOBReader extends ReadableStreamGenericReader {
+        read<T extends NodeJS.NonSharedArrayBufferView>(
+            view: T,
+            options?: ReadableStreamBYOBReaderReadOptions,
+        ): Promise<ReadableStreamReadResult<T>>;
+        releaseLock(): void;
+    }
+    var ReadableStreamBYOBReader: {
+        prototype: ReadableStreamBYOBReader;
+        new(stream: ReadableStream<NodeJS.NonSharedUint8Array>): ReadableStreamBYOBReader;
+    };
+    interface ReadableStreamBYOBRequest {
+        readonly view: NodeJS.NonSharedArrayBufferView | null;
+        respond(bytesWritten: number): void;
+        respondWithNewView(view: NodeJS.NonSharedArrayBufferView): void;
+    }
+    var ReadableStreamBYOBRequest: {
+        prototype: ReadableStreamBYOBRequest;
+        new(): ReadableStreamBYOBRequest;
+    };
+    interface ReadableStreamDefaultController<R = any> {
+        readonly desiredSize: number | null;
+        close(): void;
+        enqueue(chunk: R): void;
+        error(e?: any): void;
+    }
+    var ReadableStreamDefaultController: {
+        prototype: ReadableStreamDefaultController;
+        new(): ReadableStreamDefaultController;
+    };
+    interface ReadableStreamDefaultReader<R = any> extends ReadableStreamGenericReader {
+        read(): Promise<ReadableStreamReadResult<R>>;
+        releaseLock(): void;
+    }
+    var ReadableStreamDefaultReader: {
+        prototype: ReadableStreamDefaultReader;
+        new<R = any>(stream: ReadableStream<R>): ReadableStreamDefaultReader<R>;
+    };
+    interface TextDecoderStream extends GenericTransformStream, TextDecoderCommon {
+        readonly readable: ReadableStream<string>;
+        readonly writable: WritableStream<NodeJS.BufferSource>;
+    }
+    var TextDecoderStream: {
+        prototype: TextDecoderStream;
+        new(label?: string, options?: TextDecoderOptions): TextDecoderStream;
+    };
+    interface TextEncoderStream extends GenericTransformStream, TextEncoderCommon {
+        readonly readable: ReadableStream<NodeJS.NonSharedUint8Array>;
+        readonly writable: WritableStream<string>;
+    }
+    var TextEncoderStream: {
+        prototype: TextEncoderStream;
+        new(): TextEncoderStream;
+    };
+    interface TransformStream<I = any, O = any> {
+        readonly readable: ReadableStream<O>;
+        readonly writable: WritableStream<I>;
+    }
+    var TransformStream: {
+        prototype: TransformStream;
+        new<I = any, O = any>(
+            transformer?: Transformer<I, O>,
+            writableStrategy?: QueuingStrategy<I>,
+            readableStrategy?: QueuingStrategy<O>,
+        ): TransformStream<I, O>;
+    };
+    interface TransformStreamDefaultController<O = any> {
+        readonly desiredSize: number | null;
+        enqueue(chunk: O): void;
+        error(reason?: any): void;
+        terminate(): void;
+    }
+    var TransformStreamDefaultController: {
+        prototype: TransformStreamDefaultController;
+        new(): TransformStreamDefaultController;
+    };
+    interface WritableStream<W = any> {
+        readonly locked: boolean;
+        abort(reason?: any): Promise<void>;
+        close(): Promise<void>;
+        getWriter(): WritableStreamDefaultWriter<W>;
+    }
+    var WritableStream: {
+        prototype: WritableStream;
+        new<W = any>(underlyingSink?: UnderlyingSink<W>, strategy?: QueuingStrategy<W>): WritableStream<W>;
+    };
+    interface WritableStreamDefaultController {
+        readonly signal: AbortSignal;
+        error(e?: any): void;
+    }
+    var WritableStreamDefaultController: {
+        prototype: WritableStreamDefaultController;
+        new(): WritableStreamDefaultController;
+    };
+    interface WritableStreamDefaultWriter<W = any> {
+        readonly closed: Promise<void>;
+        readonly desiredSize: number | null;
+        readonly ready: Promise<void>;
+        abort(reason?: any): Promise<void>;
+        close(): Promise<void>;
+        releaseLock(): void;
+        write(chunk: W): Promise<void>;
+    }
+    var WritableStreamDefaultWriter: {
+        prototype: WritableStreamDefaultWriter;
+        new<W = any>(stream: WritableStream<W>): WritableStreamDefaultWriter<W>;
+    };
+}
+declare module "stream/web" {
+    export * from "node:stream/web";
+}
diff --git a/mqtt-backend/node_modules/@types/node/string_decoder.d.ts b/mqtt-backend/node_modules/@types/node/string_decoder.d.ts
new file mode 100644
index 0000000..568e3f6
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/string_decoder.d.ts
@@ -0,0 +1,27 @@
+declare module "node:string_decoder" {
+    class StringDecoder {
+        constructor(encoding?: BufferEncoding);
+        /**
+         * Returns a decoded string, ensuring that any incomplete multibyte characters at
+         * the end of the `Buffer`, or `TypedArray`, or `DataView` are omitted from the
+         * returned string and stored in an internal buffer for the next call to `stringDecoder.write()` or `stringDecoder.end()`.
+         * @since v0.1.99
+         * @param buffer The bytes to decode.
+         */
+        write(buffer: string | NodeJS.ArrayBufferView): string;
+        /**
+         * Returns any remaining input stored in the internal buffer as a string. Bytes
+         * representing incomplete UTF-8 and UTF-16 characters will be replaced with
+         * substitution characters appropriate for the character encoding.
+         *
+         * If the `buffer` argument is provided, one final call to `stringDecoder.write()` is performed before returning the remaining input.
+         * After `end()` is called, the `stringDecoder` object can be reused for new input.
+         * @since v0.9.3
+         * @param buffer The bytes to decode.
+         */
+        end(buffer?: string | NodeJS.ArrayBufferView): string;
+    }
+}
+declare module "string_decoder" {
+    export * from "node:string_decoder";
+}
diff --git a/mqtt-backend/node_modules/@types/node/test.d.ts b/mqtt-backend/node_modules/@types/node/test.d.ts
new file mode 100644
index 0000000..a3ec5e2
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/test.d.ts
@@ -0,0 +1,2202 @@
+declare module "node:test" {
+    import { AssertMethodNames } from "node:assert";
+    import { Readable, ReadableEventMap } from "node:stream";
+    import { TestEvent } from "node:test/reporters";
+    import { URL } from "node:url";
+    import TestFn = test.TestFn;
+    import TestOptions = test.TestOptions;
+    /**
+     * The `test()` function is the value imported from the `test` module. Each
+     * invocation of this function results in reporting the test to the `TestsStream`.
+     *
+     * The `TestContext` object passed to the `fn` argument can be used to perform
+     * actions related to the current test. Examples include skipping the test, adding
+     * additional diagnostic information, or creating subtests.
+     *
+     * `test()` returns a `Promise` that fulfills once the test completes.
+     * if `test()` is called within a suite, it fulfills immediately.
+     * The return value can usually be discarded for top level tests.
+     * However, the return value from subtests should be used to prevent the parent
+     * test from finishing first and cancelling the subtest
+     * as shown in the following example.
+     *
+     * ```js
+     * test('top level test', async (t) => {
+     *   // The setTimeout() in the following subtest would cause it to outlive its
+     *   // parent test if 'await' is removed on the next line. Once the parent test
+     *   // completes, it will cancel any outstanding subtests.
+     *   await t.test('longer running subtest', async (t) => {
+     *     return new Promise((resolve, reject) => {
+     *       setTimeout(resolve, 1000);
+     *     });
+     *   });
+     * });
+     * ```
+     *
+     * The `timeout` option can be used to fail the test if it takes longer than `timeout` milliseconds to complete. However, it is not a reliable mechanism for
+     * canceling tests because a running test might block the application thread and
+     * thus prevent the scheduled cancellation.
+     * @since v18.0.0, v16.17.0
+     * @param name The name of the test, which is displayed when reporting test results.
+     * Defaults to the `name` property of `fn`, or `'<anonymous>'` if `fn` does not have a name.
+     * @param options Configuration options for the test.
+     * @param fn The function under test. The first argument to this function is a {@link TestContext} object.
+     * If the test uses callbacks, the callback function is passed as the second argument.
+     * @return Fulfilled with `undefined` once the test completes, or immediately if the test runs within a suite.
+     */
+    function test(name?: string, fn?: TestFn): Promise<void>;
+    function test(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
+    function test(options?: TestOptions, fn?: TestFn): Promise<void>;
+    function test(fn?: TestFn): Promise<void>;
+    namespace test {
+        export { test };
+        export { suite as describe, test as it };
+    }
+    namespace test {
+        /**
+         * **Note:** `shard` is used to horizontally parallelize test running across
+         * machines or processes, ideal for large-scale executions across varied
+         * environments. It's incompatible with `watch` mode, tailored for rapid
+         * code iteration by automatically rerunning tests on file changes.
+         *
+         * ```js
+         * import { tap } from 'node:test/reporters';
+         * import { run } from 'node:test';
+         * import process from 'node:process';
+         * import path from 'node:path';
+         *
+         * run({ files: [path.resolve('./tests/test.js')] })
+         *   .compose(tap)
+         *   .pipe(process.stdout);
+         * ```
+         * @since v18.9.0, v16.19.0
+         * @param options Configuration options for running tests.
+         */
+        function run(options?: RunOptions): TestsStream;
+        /**
+         * The `suite()` function is imported from the `node:test` module.
+         * @param name The name of the suite, which is displayed when reporting test results.
+         * Defaults to the `name` property of `fn`, or `'<anonymous>'` if `fn` does not have a name.
+         * @param options Configuration options for the suite. This supports the same options as {@link test}.
+         * @param fn The suite function declaring nested tests and suites. The first argument to this function is a {@link SuiteContext} object.
+         * @return Immediately fulfilled with `undefined`.
+         * @since v20.13.0
+         */
+        function suite(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
+        function suite(name?: string, fn?: SuiteFn): Promise<void>;
+        function suite(options?: TestOptions, fn?: SuiteFn): Promise<void>;
+        function suite(fn?: SuiteFn): Promise<void>;
+        namespace suite {
+            /**
+             * Shorthand for skipping a suite. This is the same as calling {@link suite} with `options.skip` set to `true`.
+             * @since v20.13.0
+             */
+            function skip(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
+            function skip(name?: string, fn?: SuiteFn): Promise<void>;
+            function skip(options?: TestOptions, fn?: SuiteFn): Promise<void>;
+            function skip(fn?: SuiteFn): Promise<void>;
+            /**
+             * Shorthand for marking a suite as `TODO`. This is the same as calling {@link suite} with `options.todo` set to `true`.
+             * @since v20.13.0
+             */
+            function todo(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
+            function todo(name?: string, fn?: SuiteFn): Promise<void>;
+            function todo(options?: TestOptions, fn?: SuiteFn): Promise<void>;
+            function todo(fn?: SuiteFn): Promise<void>;
+            /**
+             * Shorthand for marking a suite as `only`. This is the same as calling {@link suite} with `options.only` set to `true`.
+             * @since v20.13.0
+             */
+            function only(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
+            function only(name?: string, fn?: SuiteFn): Promise<void>;
+            function only(options?: TestOptions, fn?: SuiteFn): Promise<void>;
+            function only(fn?: SuiteFn): Promise<void>;
+            // added in v25.5.0, undocumented
+            function expectFailure(name?: string, options?: TestOptions, fn?: SuiteFn): Promise<void>;
+            function expectFailure(name?: string, fn?: SuiteFn): Promise<void>;
+            function expectFailure(options?: TestOptions, fn?: SuiteFn): Promise<void>;
+            function expectFailure(fn?: SuiteFn): Promise<void>;
+        }
+        /**
+         * Shorthand for skipping a test. This is the same as calling {@link test} with `options.skip` set to `true`.
+         * @since v20.2.0
+         */
+        function skip(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
+        function skip(name?: string, fn?: TestFn): Promise<void>;
+        function skip(options?: TestOptions, fn?: TestFn): Promise<void>;
+        function skip(fn?: TestFn): Promise<void>;
+        /**
+         * Shorthand for marking a test as `TODO`. This is the same as calling {@link test} with `options.todo` set to `true`.
+         * @since v20.2.0
+         */
+        function todo(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
+        function todo(name?: string, fn?: TestFn): Promise<void>;
+        function todo(options?: TestOptions, fn?: TestFn): Promise<void>;
+        function todo(fn?: TestFn): Promise<void>;
+        /**
+         * Shorthand for marking a test as `only`. This is the same as calling {@link test} with `options.only` set to `true`.
+         * @since v20.2.0
+         */
+        function only(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
+        function only(name?: string, fn?: TestFn): Promise<void>;
+        function only(options?: TestOptions, fn?: TestFn): Promise<void>;
+        function only(fn?: TestFn): Promise<void>;
+        // added in v25.5.0, undocumented
+        function expectFailure(name?: string, options?: TestOptions, fn?: TestFn): Promise<void>;
+        function expectFailure(name?: string, fn?: TestFn): Promise<void>;
+        function expectFailure(options?: TestOptions, fn?: TestFn): Promise<void>;
+        function expectFailure(fn?: TestFn): Promise<void>;
+        /**
+         * The type of a function passed to {@link test}. The first argument to this function is a {@link TestContext} object.
+         * If the test uses callbacks, the callback function is passed as the second argument.
+         */
+        type TestFn = (t: TestContext, done: (result?: any) => void) => void | Promise<void>;
+        /**
+         * The type of a suite test function. The argument to this function is a {@link SuiteContext} object.
+         */
+        type SuiteFn = (s: SuiteContext) => void | Promise<void>;
+        interface TestShard {
+            /**
+             * A positive integer between 1 and `total` that specifies the index of the shard to run.
+             */
+            index: number;
+            /**
+             * A positive integer that specifies the total number of shards to split the test files to.
+             */
+            total: number;
+        }
+        interface RunOptions {
+            /**
+             * If a number is provided, then that many tests would run asynchronously (they are still managed by the single-threaded event loop).
+             * If `true`, it would run `os.availableParallelism() - 1` test files in parallel. If `false`, it would only run one test file at a time.
+             * @default false
+             */
+            concurrency?: number | boolean | undefined;
+            /**
+             * Specifies the current working directory to be used by the test runner.
+             * Serves as the base path for resolving files according to the
+             * [test runner execution model](https://nodejs.org/docs/latest-v25.x/api/test.html#test-runner-execution-model).
+             * @since v23.0.0
+             * @default process.cwd()
+             */
+            cwd?: string | undefined;
+            /**
+             * An array containing the list of files to run. If omitted, files are run according to the
+             * [test runner execution model](https://nodejs.org/docs/latest-v25.x/api/test.html#test-runner-execution-model).
+             */
+            files?: readonly string[] | undefined;
+            /**
+             * Configures the test runner to exit the process once all known
+             * tests have finished executing even if the event loop would
+             * otherwise remain active.
+             * @default false
+             */
+            forceExit?: boolean | undefined;
+            /**
+             * An array containing the list of glob patterns to match test files.
+             * This option cannot be used together with `files`. If omitted, files are run according to the
+             * [test runner execution model](https://nodejs.org/docs/latest-v25.x/api/test.html#test-runner-execution-model).
+             * @since v22.6.0
+             */
+            globPatterns?: readonly string[] | undefined;
+            /**
+             * Sets inspector port of test child process.
+             * This can be a number, or a function that takes no arguments and returns a
+             * number. If a nullish value is provided, each process gets its own port,
+             * incremented from the primary's `process.debugPort`. This option is ignored
+             * if the `isolation` option is set to `'none'` as no child processes are
+             * spawned.
+             * @default undefined
+             */
+            inspectPort?: number | (() => number) | undefined;
+            /**
+             * Configures the type of test isolation. If set to
+             * `'process'`, each test file is run in a separate child process. If set to
+             * `'none'`, all test files run in the current process.
+             * @default 'process'
+             * @since v22.8.0
+             */
+            isolation?: "process" | "none" | undefined;
+            /**
+             * If truthy, the test context will only run tests that have the `only` option set
+             */
+            only?: boolean | undefined;
+            /**
+             * A function that accepts the `TestsStream` instance and can be used to setup listeners before any tests are run.
+             * @default undefined
+             */
+            setup?: ((reporter: TestsStream) => void | Promise<void>) | undefined;
+            /**
+             * An array of CLI flags to pass to the `node` executable when
+             * spawning the subprocesses. This option has no effect when `isolation` is `'none`'.
+             * @since v22.10.0
+             * @default []
+             */
+            execArgv?: readonly string[] | undefined;
+            /**
+             * An array of CLI flags to pass to each test file when spawning the
+             * subprocesses. This option has no effect when `isolation` is `'none'`.
+             * @since v22.10.0
+             * @default []
+             */
+            argv?: readonly string[] | undefined;
+            /**
+             * Allows aborting an in-progress test execution.
+             */
+            signal?: AbortSignal | undefined;
+            /**
+             * If provided, only run tests whose name matches the provided pattern.
+             * Strings are interpreted as JavaScript regular expressions.
+             * @default undefined
+             */
+            testNamePatterns?: string | RegExp | ReadonlyArray<string | RegExp> | undefined;
+            /**
+             * A String, RegExp or a RegExp Array, that can be used to exclude running tests whose
+             * name matches the provided pattern. Test name patterns are interpreted as JavaScript
+             * regular expressions. For each test that is executed, any corresponding test hooks,
+             * such as `beforeEach()`, are also run.
+             * @default undefined
+             * @since v22.1.0
+             */
+            testSkipPatterns?: string | RegExp | ReadonlyArray<string | RegExp> | undefined;
+            /**
+             * The number of milliseconds after which the test execution will fail.
+             * If unspecified, subtests inherit this value from their parent.
+             * @default Infinity
+             */
+            timeout?: number | undefined;
+            /**
+             * Whether to run in watch mode or not.
+             * @default false
+             */
+            watch?: boolean | undefined;
+            /**
+             * Running tests in a specific shard.
+             * @default undefined
+             */
+            shard?: TestShard | undefined;
+            /**
+             * A file path where the test runner will
+             * store the state of the tests to allow rerunning only the failed tests on a next run.
+             * @since v24.7.0
+             * @default undefined
+             */
+            rerunFailuresFilePath?: string | undefined;
+            /**
+             * enable [code coverage](https://nodejs.org/docs/latest-v25.x/api/test.html#collecting-code-coverage) collection.
+             * @since v22.10.0
+             * @default false
+             */
+            coverage?: boolean | undefined;
+            /**
+             * Excludes specific files from code coverage
+             * using a glob pattern, which can match both absolute and relative file paths.
+             * This property is only applicable when `coverage` was set to `true`.
+             * If both `coverageExcludeGlobs` and `coverageIncludeGlobs` are provided,
+             * files must meet **both** criteria to be included in the coverage report.
+             * @since v22.10.0
+             * @default undefined
+             */
+            coverageExcludeGlobs?: string | readonly string[] | undefined;
+            /**
+             * Includes specific files in code coverage
+             * using a glob pattern, which can match both absolute and relative file paths.
+             * This property is only applicable when `coverage` was set to `true`.
+             * If both `coverageExcludeGlobs` and `coverageIncludeGlobs` are provided,
+             * files must meet **both** criteria to be included in the coverage report.
+             * @since v22.10.0
+             * @default undefined
+             */
+            coverageIncludeGlobs?: string | readonly string[] | undefined;
+            /**
+             * Require a minimum percent of covered lines. If code
+             * coverage does not reach the threshold specified, the process will exit with code `1`.
+             * @since v22.10.0
+             * @default 0
+             */
+            lineCoverage?: number | undefined;
+            /**
+             * Require a minimum percent of covered branches. If code
+             * coverage does not reach the threshold specified, the process will exit with code `1`.
+             * @since v22.10.0
+             * @default 0
+             */
+            branchCoverage?: number | undefined;
+            /**
+             * Require a minimum percent of covered functions. If code
+             * coverage does not reach the threshold specified, the process will exit with code `1`.
+             * @since v22.10.0
+             * @default 0
+             */
+            functionCoverage?: number | undefined;
+            /**
+             * Specify environment variables to be passed along to the test process.
+             * This options is not compatible with `isolation='none'`. These variables will override
+             * those from the main process, and are not merged with `process.env`.
+             * @since v25.6.0
+             */
+            env?: NodeJS.ProcessEnv | undefined;
+        }
+        interface TestsStreamEventMap extends ReadableEventMap {
+            "data": [data: TestEvent];
+            "test:coverage": [data: EventData.TestCoverage];
+            "test:complete": [data: EventData.TestComplete];
+            "test:dequeue": [data: EventData.TestDequeue];
+            "test:diagnostic": [data: EventData.TestDiagnostic];
+            "test:enqueue": [data: EventData.TestEnqueue];
+            "test:fail": [data: EventData.TestFail];
+            "test:pass": [data: EventData.TestPass];
+            "test:plan": [data: EventData.TestPlan];
+            "test:start": [data: EventData.TestStart];
+            "test:stderr": [data: EventData.TestStderr];
+            "test:stdout": [data: EventData.TestStdout];
+            "test:summary": [data: EventData.TestSummary];
+            "test:watch:drained": [];
+            "test:watch:restarted": [];
+        }
+        /**
+         * A successful call to `run()` will return a new `TestsStream` object, streaming a series of events representing the execution of the tests.
+         *
+         * Some of the events are guaranteed to be emitted in the same order as the tests are defined, while others are emitted in the order that the tests execute.
+         * @since v18.9.0, v16.19.0
+         */
+        interface TestsStream extends Readable {
+            // #region InternalEventEmitter
+            addListener<E extends keyof TestsStreamEventMap>(
+                eventName: E,
+                listener: (...args: TestsStreamEventMap[E]) => void,
+            ): this;
+            addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            emit<E extends keyof TestsStreamEventMap>(eventName: E, ...args: TestsStreamEventMap[E]): boolean;
+            emit(eventName: string | symbol, ...args: any[]): boolean;
+            listenerCount<E extends keyof TestsStreamEventMap>(
+                eventName: E,
+                listener?: (...args: TestsStreamEventMap[E]) => void,
+            ): number;
+            listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+            listeners<E extends keyof TestsStreamEventMap>(eventName: E): ((...args: TestsStreamEventMap[E]) => void)[];
+            listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+            off<E extends keyof TestsStreamEventMap>(
+                eventName: E,
+                listener: (...args: TestsStreamEventMap[E]) => void,
+            ): this;
+            off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            on<E extends keyof TestsStreamEventMap>(
+                eventName: E,
+                listener: (...args: TestsStreamEventMap[E]) => void,
+            ): this;
+            on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            once<E extends keyof TestsStreamEventMap>(
+                eventName: E,
+                listener: (...args: TestsStreamEventMap[E]) => void,
+            ): this;
+            once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            prependListener<E extends keyof TestsStreamEventMap>(
+                eventName: E,
+                listener: (...args: TestsStreamEventMap[E]) => void,
+            ): this;
+            prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            prependOnceListener<E extends keyof TestsStreamEventMap>(
+                eventName: E,
+                listener: (...args: TestsStreamEventMap[E]) => void,
+            ): this;
+            prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            rawListeners<E extends keyof TestsStreamEventMap>(
+                eventName: E,
+            ): ((...args: TestsStreamEventMap[E]) => void)[];
+            rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+            // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+            removeAllListeners<E extends keyof TestsStreamEventMap>(eventName?: E): this;
+            removeAllListeners(eventName?: string | symbol): this;
+            removeListener<E extends keyof TestsStreamEventMap>(
+                eventName: E,
+                listener: (...args: TestsStreamEventMap[E]) => void,
+            ): this;
+            removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+            // #endregion
+        }
+        namespace EventData {
+            interface Error extends globalThis.Error {
+                cause: unknown;
+            }
+            interface LocationInfo {
+                /**
+                 * The column number where the test is defined, or
+                 * `undefined` if the test was run through the REPL.
+                 */
+                column?: number;
+                /**
+                 * The path of the test file, `undefined` if test was run through the REPL.
+                 */
+                file?: string;
+                /**
+                 * The line number where the test is defined, or `undefined` if the test was run through the REPL.
+                 */
+                line?: number;
+            }
+            interface TestDiagnostic extends LocationInfo {
+                /**
+                 * The diagnostic message.
+                 */
+                message: string;
+                /**
+                 * The nesting level of the test.
+                 */
+                nesting: number;
+                /**
+                 * The severity level of the diagnostic message.
+                 * Possible values are:
+                 * * `'info'`: Informational messages.
+                 * * `'warn'`: Warnings.
+                 * * `'error'`: Errors.
+                 */
+                level: "info" | "warn" | "error";
+            }
+            interface TestCoverage {
+                /**
+                 * An object containing the coverage report.
+                 */
+                summary: {
+                    /**
+                     * An array of coverage reports for individual files.
+                     */
+                    files: Array<{
+                        /**
+                         * The absolute path of the file.
+                         */
+                        path: string;
+                        /**
+                         * The total number of lines.
+                         */
+                        totalLineCount: number;
+                        /**
+                         * The total number of branches.
+                         */
+                        totalBranchCount: number;
+                        /**
+                         * The total number of functions.
+                         */
+                        totalFunctionCount: number;
+                        /**
+                         * The number of covered lines.
+                         */
+                        coveredLineCount: number;
+                        /**
+                         * The number of covered branches.
+                         */
+                        coveredBranchCount: number;
+                        /**
+                         * The number of covered functions.
+                         */
+                        coveredFunctionCount: number;
+                        /**
+                         * The percentage of lines covered.
+                         */
+                        coveredLinePercent: number;
+                        /**
+                         * The percentage of branches covered.
+                         */
+                        coveredBranchPercent: number;
+                        /**
+                         * The percentage of functions covered.
+                         */
+                        coveredFunctionPercent: number;
+                        /**
+                         * An array of functions representing function coverage.
+                         */
+                        functions: Array<{
+                            /**
+                             * The name of the function.
+                             */
+                            name: string;
+                            /**
+                             * The line number where the function is defined.
+                             */
+                            line: number;
+                            /**
+                             * The number of times the function was called.
+                             */
+                            count: number;
+                        }>;
+                        /**
+                         * An array of branches representing branch coverage.
+                         */
+                        branches: Array<{
+                            /**
+                             * The line number where the branch is defined.
+                             */
+                            line: number;
+                            /**
+                             * The number of times the branch was taken.
+                             */
+                            count: number;
+                        }>;
+                        /**
+                         * An array of lines representing line numbers and the number of times they were covered.
+                         */
+                        lines: Array<{
+                            /**
+                             * The line number.
+                             */
+                            line: number;
+                            /**
+                             * The number of times the line was covered.
+                             */
+                            count: number;
+                        }>;
+                    }>;
+                    /**
+                     * An object containing whether or not the coverage for
+                     * each coverage type.
+                     * @since v22.9.0
+                     */
+                    thresholds: {
+                        /**
+                         * The function coverage threshold.
+                         */
+                        function: number;
+                        /**
+                         * The branch coverage threshold.
+                         */
+                        branch: number;
+                        /**
+                         * The line coverage threshold.
+                         */
+                        line: number;
+                    };
+                    /**
+                     * An object containing a summary of coverage for all files.
+                     */
+                    totals: {
+                        /**
+                         * The total number of lines.
+                         */
+                        totalLineCount: number;
+                        /**
+                         * The total number of branches.
+                         */
+                        totalBranchCount: number;
+                        /**
+                         * The total number of functions.
+                         */
+                        totalFunctionCount: number;
+                        /**
+                         * The number of covered lines.
+                         */
+                        coveredLineCount: number;
+                        /**
+                         * The number of covered branches.
+                         */
+                        coveredBranchCount: number;
+                        /**
+                         * The number of covered functions.
+                         */
+                        coveredFunctionCount: number;
+                        /**
+                         * The percentage of lines covered.
+                         */
+                        coveredLinePercent: number;
+                        /**
+                         * The percentage of branches covered.
+                         */
+                        coveredBranchPercent: number;
+                        /**
+                         * The percentage of functions covered.
+                         */
+                        coveredFunctionPercent: number;
+                    };
+                    /**
+                     * The working directory when code coverage began. This
+                     * is useful for displaying relative path names in case
+                     * the tests changed the working directory of the Node.js process.
+                     */
+                    workingDirectory: string;
+                };
+                /**
+                 * The nesting level of the test.
+                 */
+                nesting: number;
+            }
+            interface TestComplete extends LocationInfo {
+                /**
+                 * Additional execution metadata.
+                 */
+                details: {
+                    /**
+                     * Whether the test passed or not.
+                     */
+                    passed: boolean;
+                    /**
+                     * The duration of the test in milliseconds.
+                     */
+                    duration_ms: number;
+                    /**
+                     * An error wrapping the error thrown by the test if it did not pass.
+                     */
+                    error?: Error;
+                    /**
+                     * The type of the test, used to denote whether this is a suite.
+                     */
+                    type?: "suite" | "test";
+                };
+                /**
+                 * The test name.
+                 */
+                name: string;
+                /**
+                 * The nesting level of the test.
+                 */
+                nesting: number;
+                /**
+                 * The ordinal number of the test.
+                 */
+                testNumber: number;
+                /**
+                 * Present if `context.todo` is called.
+                 */
+                todo?: string | boolean;
+                /**
+                 * Present if `context.skip` is called.
+                 */
+                skip?: string | boolean;
+            }
+            interface TestDequeue extends LocationInfo {
+                /**
+                 * The test name.
+                 */
+                name: string;
+                /**
+                 * The nesting level of the test.
+                 */
+                nesting: number;
+                /**
+                 * The test type. Either `'suite'` or `'test'`.
+                 * @since v22.15.0
+                 */
+                type: "suite" | "test";
+            }
+            interface TestEnqueue extends LocationInfo {
+                /**
+                 * The test name.
+                 */
+                name: string;
+                /**
+                 * The nesting level of the test.
+                 */
+                nesting: number;
+                /**
+                 * The test type. Either `'suite'` or `'test'`.
+                 * @since v22.15.0
+                 */
+                type: "suite" | "test";
+            }
+            interface TestFail extends LocationInfo {
+                /**
+                 * Additional execution metadata.
+                 */
+                details: {
+                    /**
+                     * The duration of the test in milliseconds.
+                     */
+                    duration_ms: number;
+                    /**
+                     * An error wrapping the error thrown by the test.
+                     */
+                    error: Error;
+                    /**
+                     * The type of the test, used to denote whether this is a suite.
+                     * @since v20.0.0, v19.9.0, v18.17.0
+                     */
+                    type?: "suite" | "test";
+                    /**
+                     * The attempt number of the test run,
+                     * present only when using the `--test-rerun-failures` flag.
+                     * @since v24.7.0
+                     */
+                    attempt?: number;
+                };
+                /**
+                 * The test name.
+                 */
+                name: string;
+                /**
+                 * The nesting level of the test.
+                 */
+                nesting: number;
+                /**
+                 * The ordinal number of the test.
+                 */
+                testNumber: number;
+                /**
+                 * Present if `context.todo` is called.
+                 */
+                todo?: string | boolean;
+                /**
+                 * Present if `context.skip` is called.
+                 */
+                skip?: string | boolean;
+            }
+            interface TestPass extends LocationInfo {
+                /**
+                 * Additional execution metadata.
+                 */
+                details: {
+                    /**
+                     * The duration of the test in milliseconds.
+                     */
+                    duration_ms: number;
+                    /**
+                     * The type of the test, used to denote whether this is a suite.
+                     * @since 20.0.0, 19.9.0, 18.17.0
+                     */
+                    type?: "suite" | "test";
+                    /**
+                     * The attempt number of the test run,
+                     * present only when using the `--test-rerun-failures` flag.
+                     * @since v24.7.0
+                     */
+                    attempt?: number;
+                    /**
+                     * The attempt number the test passed on,
+                     * present only when using the `--test-rerun-failures` flag.
+                     * @since v24.7.0
+                     */
+                    passed_on_attempt?: number;
+                };
+                /**
+                 * The test name.
+                 */
+                name: string;
+                /**
+                 * The nesting level of the test.
+                 */
+                nesting: number;
+                /**
+                 * The ordinal number of the test.
+                 */
+                testNumber: number;
+                /**
+                 * Present if `context.todo` is called.
+                 */
+                todo?: string | boolean;
+                /**
+                 * Present if `context.skip` is called.
+                 */
+                skip?: string | boolean;
+            }
+            interface TestPlan extends LocationInfo {
+                /**
+                 * The nesting level of the test.
+                 */
+                nesting: number;
+                /**
+                 * The number of subtests that have ran.
+                 */
+                count: number;
+            }
+            interface TestStart extends LocationInfo {
+                /**
+                 * The test name.
+                 */
+                name: string;
+                /**
+                 * The nesting level of the test.
+                 */
+                nesting: number;
+            }
+            interface TestStderr {
+                /**
+                 * The path of the test file.
+                 */
+                file: string;
+                /**
+                 * The message written to `stderr`.
+                 */
+                message: string;
+            }
+            interface TestStdout {
+                /**
+                 * The path of the test file.
+                 */
+                file: string;
+                /**
+                 * The message written to `stdout`.
+                 */
+                message: string;
+            }
+            interface TestSummary {
+                /**
+                 * An object containing the counts of various test results.
+                 */
+                counts: {
+                    /**
+                     * The total number of cancelled tests.
+                     */
+                    cancelled: number;
+                    /**
+                     * The total number of passed tests.
+                     */
+                    passed: number;
+                    /**
+                     * The total number of skipped tests.
+                     */
+                    skipped: number;
+                    /**
+                     * The total number of suites run.
+                     */
+                    suites: number;
+                    /**
+                     * The total number of tests run, excluding suites.
+                     */
+                    tests: number;
+                    /**
+                     * The total number of TODO tests.
+                     */
+                    todo: number;
+                    /**
+                     * The total number of top level tests and suites.
+                     */
+                    topLevel: number;
+                };
+                /**
+                 * The duration of the test run in milliseconds.
+                 */
+                duration_ms: number;
+                /**
+                 * The path of the test file that generated the
+                 * summary. If the summary corresponds to multiple files, this value is
+                 * `undefined`.
+                 */
+                file: string | undefined;
+                /**
+                 * Indicates whether or not the test run is considered
+                 * successful or not. If any error condition occurs, such as a failing test or
+                 * unmet coverage threshold, this value will be set to `false`.
+                 */
+                success: boolean;
+            }
+        }
+        /**
+         * An instance of `TestContext` is passed to each test function in order to
+         * interact with the test runner. However, the `TestContext` constructor is not
+         * exposed as part of the API.
+         * @since v18.0.0, v16.17.0
+         */
+        interface TestContext {
+            /**
+             * An object containing assertion methods bound to the test context.
+             * The top-level functions from the `node:assert` module are exposed here for the purpose of creating test plans.
+             *
+             * **Note:** Some of the functions from `node:assert` contain type assertions. If these are called via the
+             * TestContext `assert` object, then the context parameter in the test's function signature **must be explicitly typed**
+             * (ie. the parameter must have a type annotation), otherwise an error will be raised by the TypeScript compiler:
+             * ```ts
+             * import { test, type TestContext } from 'node:test';
+             *
+             * // The test function's context parameter must have a type annotation.
+             * test('example', (t: TestContext) => {
+             *   t.assert.deepStrictEqual(actual, expected);
+             * });
+             *
+             * // Omitting the type annotation will result in a compilation error.
+             * test('example', t => {
+             *   t.assert.deepStrictEqual(actual, expected); // Error: 't' needs an explicit type annotation.
+             * });
+             * ```
+             * @since v22.2.0, v20.15.0
+             */
+            readonly assert: TestContextAssert;
+            /**
+             * This function is used to create a hook running before subtest of the current test.
+             * @param fn The hook function. The first argument to this function is a `TestContext` object.
+             * If the hook uses callbacks, the callback function is passed as the second argument.
+             * @param options Configuration options for the hook.
+             * @since v20.1.0, v18.17.0
+             */
+            before(fn?: TestContextHookFn, options?: HookOptions): void;
+            /**
+             * This function is used to create a hook running before each subtest of the current test.
+             * @param fn The hook function. The first argument to this function is a `TestContext` object.
+             * If the hook uses callbacks, the callback function is passed as the second argument.
+             * @param options Configuration options for the hook.
+             * @since v18.8.0
+             */
+            beforeEach(fn?: TestContextHookFn, options?: HookOptions): void;
+            /**
+             * This function is used to create a hook that runs after the current test finishes.
+             * @param fn The hook function. The first argument to this function is a `TestContext` object.
+             * If the hook uses callbacks, the callback function is passed as the second argument.
+             * @param options Configuration options for the hook.
+             * @since v18.13.0
+             */
+            after(fn?: TestContextHookFn, options?: HookOptions): void;
+            /**
+             * This function is used to create a hook running after each subtest of the current test.
+             * @param fn The hook function. The first argument to this function is a `TestContext` object.
+             * If the hook uses callbacks, the callback function is passed as the second argument.
+             * @param options Configuration options for the hook.
+             * @since v18.8.0
+             */
+            afterEach(fn?: TestContextHookFn, options?: HookOptions): void;
+            /**
+             * This function is used to write diagnostics to the output. Any diagnostic
+             * information is included at the end of the test's results. This function does
+             * not return a value.
+             *
+             * ```js
+             * test('top level test', (t) => {
+             *   t.diagnostic('A diagnostic message');
+             * });
+             * ```
+             * @since v18.0.0, v16.17.0
+             * @param message Message to be reported.
+             */
+            diagnostic(message: string): void;
+            /**
+             * The absolute path of the test file that created the current test. If a test file imports
+             * additional modules that generate tests, the imported tests will return the path of the root test file.
+             * @since v22.6.0
+             */
+            readonly filePath: string | undefined;
+            /**
+             * The name of the test and each of its ancestors, separated by `>`.
+             * @since v22.3.0
+             */
+            readonly fullName: string;
+            /**
+             * The name of the test.
+             * @since v18.8.0, v16.18.0
+             */
+            readonly name: string;
+            /**
+             * Indicated whether the test succeeded.
+             * @since v21.7.0, v20.12.0
+             */
+            readonly passed: boolean;
+            /**
+             * The failure reason for the test/case; wrapped and available via `context.error.cause`.
+             * @since v21.7.0, v20.12.0
+             */
+            readonly error: EventData.Error | null;
+            /**
+             * Number of times the test has been attempted.
+             * @since v21.7.0, v20.12.0
+             */
+            readonly attempt: number;
+            /**
+             * This function is used to set the number of assertions and subtests that are expected to run
+             * within the test. If the number of assertions and subtests that run does not match the
+             * expected count, the test will fail.
+             *
+             * > Note: To make sure assertions are tracked, `t.assert` must be used instead of `assert` directly.
+             *
+             * ```js
+             * test('top level test', (t) => {
+             *   t.plan(2);
+             *   t.assert.ok('some relevant assertion here');
+             *   t.test('subtest', () => {});
+             * });
+             * ```
+             *
+             * When working with asynchronous code, the `plan` function can be used to ensure that the
+             * correct number of assertions are run:
+             *
+             * ```js
+             * test('planning with streams', (t, done) => {
+             *   function* generate() {
+             *     yield 'a';
+             *     yield 'b';
+             *     yield 'c';
+             *   }
+             *   const expected = ['a', 'b', 'c'];
+             *   t.plan(expected.length);
+             *   const stream = Readable.from(generate());
+             *   stream.on('data', (chunk) => {
+             *     t.assert.strictEqual(chunk, expected.shift());
+             *   });
+             *
+             *   stream.on('end', () => {
+             *     done();
+             *   });
+             * });
+             * ```
+             *
+             * When using the `wait` option, you can control how long the test will wait for the expected assertions.
+             * For example, setting a maximum wait time ensures that the test will wait for asynchronous assertions
+             * to complete within the specified timeframe:
+             *
+             * ```js
+             * test('plan with wait: 2000 waits for async assertions', (t) => {
+             *   t.plan(1, { wait: 2000 }); // Waits for up to 2 seconds for the assertion to complete.
+             *
+             *   const asyncActivity = () => {
+             *     setTimeout(() => {
+             *          *       t.assert.ok(true, 'Async assertion completed within the wait time');
+             *     }, 1000); // Completes after 1 second, within the 2-second wait time.
+             *   };
+             *
+             *   asyncActivity(); // The test will pass because the assertion is completed in time.
+             * });
+             * ```
+             *
+             * Note: If a `wait` timeout is specified, it begins counting down only after the test function finishes executing.
+             * @since v22.2.0
+             */
+            plan(count: number, options?: TestContextPlanOptions): void;
+            /**
+             * If `shouldRunOnlyTests` is truthy, the test context will only run tests that
+             * have the `only` option set. Otherwise, all tests are run. If Node.js was not
+             * started with the `--test-only` command-line option, this function is a
+             * no-op.
+             *
+             * ```js
+             * test('top level test', (t) => {
+             *   // The test context can be set to run subtests with the 'only' option.
+             *   t.runOnly(true);
+             *   return Promise.all([
+             *     t.test('this subtest is now skipped'),
+             *     t.test('this subtest is run', { only: true }),
+             *   ]);
+             * });
+             * ```
+             * @since v18.0.0, v16.17.0
+             * @param shouldRunOnlyTests Whether or not to run `only` tests.
+             */
+            runOnly(shouldRunOnlyTests: boolean): void;
+            /**
+             * ```js
+             * test('top level test', async (t) => {
+             *   await fetch('some/uri', { signal: t.signal });
+             * });
+             * ```
+             * @since v18.7.0, v16.17.0
+             */
+            readonly signal: AbortSignal;
+            /**
+             * This function causes the test's output to indicate the test as skipped. If `message` is provided, it is included in the output. Calling `skip()` does
+             * not terminate execution of the test function. This function does not return a
+             * value.
+             *
+             * ```js
+             * test('top level test', (t) => {
+             *   // Make sure to return here as well if the test contains additional logic.
+             *   t.skip('this is skipped');
+             * });
+             * ```
+             * @since v18.0.0, v16.17.0
+             * @param message Optional skip message.
+             */
+            skip(message?: string): void;
+            /**
+             * This function adds a `TODO` directive to the test's output. If `message` is
+             * provided, it is included in the output. Calling `todo()` does not terminate
+             * execution of the test function. This function does not return a value.
+             *
+             * ```js
+             * test('top level test', (t) => {
+             *   // This test is marked as `TODO`
+             *   t.todo('this is a todo');
+             * });
+             * ```
+             * @since v18.0.0, v16.17.0
+             * @param message Optional `TODO` message.
+             */
+            todo(message?: string): void;
+            /**
+             * This function is used to create subtests under the current test. This function behaves in
+             * the same fashion as the top level {@link test} function.
+             * @since v18.0.0
+             * @param name The name of the test, which is displayed when reporting test results.
+             * Defaults to the `name` property of `fn`, or `'<anonymous>'` if `fn` does not have a name.
+             * @param options Configuration options for the test.
+             * @param fn The function under test. This first argument to this function is a {@link TestContext} object.
+             * If the test uses callbacks, the callback function is passed as the second argument.
+             * @returns A {@link Promise} resolved with `undefined` once the test completes.
+             */
+            test: typeof test;
+            /**
+             * This method polls a `condition` function until that function either returns
+             * successfully or the operation times out.
+             * @since v22.14.0
+             * @param condition An assertion function that is invoked
+             * periodically until it completes successfully or the defined polling timeout
+             * elapses. Successful completion is defined as not throwing or rejecting. This
+             * function does not accept any arguments, and is allowed to return any value.
+             * @param options An optional configuration object for the polling operation.
+             * @returns Fulfilled with the value returned by `condition`.
+             */
+            waitFor<T>(condition: () => T, options?: TestContextWaitForOptions): Promise<Awaited<T>>;
+            /**
+             * Each test provides its own MockTracker instance.
+             */
+            readonly mock: MockTracker;
+        }
+        interface TestContextAssert extends Pick<typeof import("assert"), AssertMethodNames> {
+            /**
+             * This function serializes `value` and writes it to the file specified by `path`.
+             *
+             * ```js
+             * test('snapshot test with default serialization', (t) => {
+             *   t.assert.fileSnapshot({ value1: 1, value2: 2 }, './snapshots/snapshot.json');
+             * });
+             * ```
+             *
+             * This function differs from `context.assert.snapshot()` in the following ways:
+             *
+             * * The snapshot file path is explicitly provided by the user.
+             * * Each snapshot file is limited to a single snapshot value.
+             * * No additional escaping is performed by the test runner.
+             *
+             * These differences allow snapshot files to better support features such as syntax
+             * highlighting.
+             * @since v22.14.0
+             * @param value A value to serialize to a string. If Node.js was started with
+             * the [`--test-update-snapshots`](https://nodejs.org/docs/latest-v25.x/api/cli.html#--test-update-snapshots)
+             * flag, the serialized value is written to
+             * `path`. Otherwise, the serialized value is compared to the contents of the
+             * existing snapshot file.
+             * @param path The file where the serialized `value` is written.
+             * @param options Optional configuration options.
+             */
+            fileSnapshot(value: any, path: string, options?: AssertSnapshotOptions): void;
+            /**
+             * This function implements assertions for snapshot testing.
+             * ```js
+             * test('snapshot test with default serialization', (t) => {
+             *   t.assert.snapshot({ value1: 1, value2: 2 });
+             * });
+             *
+             * test('snapshot test with custom serialization', (t) => {
+             *   t.assert.snapshot({ value3: 3, value4: 4 }, {
+             *     serializers: [(value) => JSON.stringify(value)]
+             *   });
+             * });
+             * ```
+             * @since v22.3.0
+             * @param value A value to serialize to a string. If Node.js was started with
+             * the [`--test-update-snapshots`](https://nodejs.org/docs/latest-v25.x/api/cli.html#--test-update-snapshots)
+             * flag, the serialized value is written to
+             * the snapshot file. Otherwise, the serialized value is compared to the
+             * corresponding value in the existing snapshot file.
+             */
+            snapshot(value: any, options?: AssertSnapshotOptions): void;
+            /**
+             * A custom assertion function registered with `assert.register()`.
+             */
+            [name: string]: (...args: any[]) => void;
+        }
+        interface AssertSnapshotOptions {
+            /**
+             * An array of synchronous functions used to serialize `value` into a string.
+             * `value` is passed as the only argument to the first serializer function.
+             * The return value of each serializer is passed as input to the next serializer.
+             * Once all serializers have run, the resulting value is coerced to a string.
+             *
+             * If no serializers are provided, the test runner's default serializers are used.
+             */
+            serializers?: ReadonlyArray<(value: any) => any> | undefined;
+        }
+        interface TestContextPlanOptions {
+            /**
+             * The wait time for the plan:
+             * * If `true`, the plan waits indefinitely for all assertions and subtests to run.
+             * * If `false`, the plan performs an immediate check after the test function completes,
+             * without waiting for any pending assertions or subtests.
+             * Any assertions or subtests that complete after this check will not be counted towards the plan.
+             * * If a number, it specifies the maximum wait time in milliseconds
+             * before timing out while waiting for expected assertions and subtests to be matched.
+             * If the timeout is reached, the test will fail.
+             * @default false
+             */
+            wait?: boolean | number | undefined;
+        }
+        interface TestContextWaitForOptions {
+            /**
+             * The number of milliseconds to wait after an unsuccessful
+             * invocation of `condition` before trying again.
+             * @default 50
+             */
+            interval?: number | undefined;
+            /**
+             * The poll timeout in milliseconds. If `condition` has not
+             * succeeded by the time this elapses, an error occurs.
+             * @default 1000
+             */
+            timeout?: number | undefined;
+        }
+        /**
+         * An instance of `SuiteContext` is passed to each suite function in order to
+         * interact with the test runner. However, the `SuiteContext` constructor is not
+         * exposed as part of the API.
+         * @since v18.7.0, v16.17.0
+         */
+        interface SuiteContext {
+            /**
+             * The absolute path of the test file that created the current suite. If a test file imports
+             * additional modules that generate suites, the imported suites will return the path of the root test file.
+             * @since v22.6.0
+             */
+            readonly filePath: string | undefined;
+            /**
+             * The name of the suite and each of its ancestors, separated by `>`.
+             * @since v22.3.0, v20.16.0
+             */
+            readonly fullName: string;
+            /**
+             * The name of the suite.
+             * @since v18.8.0, v16.18.0
+             */
+            readonly name: string;
+            /**
+             * Can be used to abort test subtasks when the test has been aborted.
+             * @since v18.7.0, v16.17.0
+             */
+            readonly signal: AbortSignal;
+        }
+        interface TestOptions {
+            /**
+             * If a number is provided, then that many tests would run in parallel.
+             * If truthy, it would run (number of cpu cores - 1) tests in parallel.
+             * For subtests, it will be `Infinity` tests in parallel.
+             * If falsy, it would only run one test at a time.
+             * If unspecified, subtests inherit this value from their parent.
+             * @default false
+             */
+            concurrency?: number | boolean | undefined;
+            /**
+             * If truthy, and the test context is configured to run `only` tests, then this test will be
+             * run. Otherwise, the test is skipped.
+             * @default false
+             */
+            only?: boolean | undefined;
+            /**
+             * Allows aborting an in-progress test.
+             * @since v18.8.0
+             */
+            signal?: AbortSignal | undefined;
+            /**
+             * If truthy, the test is skipped. If a string is provided, that string is displayed in the
+             * test results as the reason for skipping the test.
+             * @default false
+             */
+            skip?: boolean | string | undefined;
+            /**
+             * A number of milliseconds the test will fail after. If unspecified, subtests inherit this
+             * value from their parent.
+             * @default Infinity
+             * @since v18.7.0
+             */
+            timeout?: number | undefined;
+            /**
+             * If truthy, the test marked as `TODO`. If a string is provided, that string is displayed in
+             * the test results as the reason why the test is `TODO`.
+             * @default false
+             */
+            todo?: boolean | string | undefined;
+            /**
+             * The number of assertions and subtests expected to be run in the test.
+             * If the number of assertions run in the test does not match the number
+             * specified in the plan, the test will fail.
+             * @default undefined
+             * @since v22.2.0
+             */
+            plan?: number | undefined;
+            // added in v25.5.0, undocumented
+            expectFailure?: boolean | undefined;
+        }
+        /**
+         * This function creates a hook that runs before executing a suite.
+         *
+         * ```js
+         * describe('tests', async () => {
+         *   before(() => console.log('about to run some test'));
+         *   it('is a subtest', () => {
+         *     // Some relevant assertion here
+         *   });
+         * });
+         * ```
+         * @since v18.8.0, v16.18.0
+         * @param fn The hook function. If the hook uses callbacks, the callback function is passed as the second argument.
+         * @param options Configuration options for the hook.
+         */
+        function before(fn?: HookFn, options?: HookOptions): void;
+        /**
+         * This function creates a hook that runs after executing a suite.
+         *
+         * ```js
+         * describe('tests', async () => {
+         *   after(() => console.log('finished running tests'));
+         *   it('is a subtest', () => {
+         *     // Some relevant assertion here
+         *   });
+         * });
+         * ```
+         * @since v18.8.0, v16.18.0
+         * @param fn The hook function. If the hook uses callbacks, the callback function is passed as the second argument.
+         * @param options Configuration options for the hook.
+         */
+        function after(fn?: HookFn, options?: HookOptions): void;
+        /**
+         * This function creates a hook that runs before each test in the current suite.
+         *
+         * ```js
+         * describe('tests', async () => {
+         *   beforeEach(() => console.log('about to run a test'));
+         *   it('is a subtest', () => {
+         *     // Some relevant assertion here
+         *   });
+         * });
+         * ```
+         * @since v18.8.0, v16.18.0
+         * @param fn The hook function. If the hook uses callbacks, the callback function is passed as the second argument.
+         * @param options Configuration options for the hook.
+         */
+        function beforeEach(fn?: HookFn, options?: HookOptions): void;
+        /**
+         * This function creates a hook that runs after each test in the current suite.
+         * The `afterEach()` hook is run even if the test fails.
+         *
+         * ```js
+         * describe('tests', async () => {
+         *   afterEach(() => console.log('finished running a test'));
+         *   it('is a subtest', () => {
+         *     // Some relevant assertion here
+         *   });
+         * });
+         * ```
+         * @since v18.8.0, v16.18.0
+         * @param fn The hook function. If the hook uses callbacks, the callback function is passed as the second argument.
+         * @param options Configuration options for the hook.
+         */
+        function afterEach(fn?: HookFn, options?: HookOptions): void;
+        /**
+         * The hook function. The first argument is the context in which the hook is called.
+         * If the hook uses callbacks, the callback function is passed as the second argument.
+         */
+        type HookFn = (c: TestContext | SuiteContext, done: (result?: any) => void) => any;
+        /**
+         * The hook function. The first argument is a `TestContext` object.
+         * If the hook uses callbacks, the callback function is passed as the second argument.
+         */
+        type TestContextHookFn = (t: TestContext, done: (result?: any) => void) => any;
+        /**
+         * Configuration options for hooks.
+         * @since v18.8.0
+         */
+        interface HookOptions {
+            /**
+             * Allows aborting an in-progress hook.
+             */
+            signal?: AbortSignal | undefined;
+            /**
+             * A number of milliseconds the hook will fail after. If unspecified, subtests inherit this
+             * value from their parent.
+             * @default Infinity
+             */
+            timeout?: number | undefined;
+        }
+        interface MockFunctionOptions {
+            /**
+             * The number of times that the mock will use the behavior of `implementation`.
+             * Once the mock function has been called `times` times,
+             * it will automatically restore the behavior of `original`.
+             * This value must be an integer greater than zero.
+             * @default Infinity
+             */
+            times?: number | undefined;
+        }
+        interface MockMethodOptions extends MockFunctionOptions {
+            /**
+             * If `true`, `object[methodName]` is treated as a getter.
+             * This option cannot be used with the `setter` option.
+             */
+            getter?: boolean | undefined;
+            /**
+             * If `true`, `object[methodName]` is treated as a setter.
+             * This option cannot be used with the `getter` option.
+             */
+            setter?: boolean | undefined;
+        }
+        type Mock<F extends Function> = F & {
+            mock: MockFunctionContext<F>;
+        };
+        interface MockModuleOptions {
+            /**
+             * If false, each call to `require()` or `import()` generates a new mock module.
+             * If true, subsequent calls will return the same module mock, and the mock module is inserted into the CommonJS cache.
+             * @default false
+             */
+            cache?: boolean | undefined;
+            /**
+             * The value to use as the mocked module's default export.
+             *
+             * If this value is not provided, ESM mocks do not include a default export.
+             * If the mock is a CommonJS or builtin module, this setting is used as the value of `module.exports`.
+             * If this value is not provided, CJS and builtin mocks use an empty object as the value of `module.exports`.
+             */
+            defaultExport?: any;
+            /**
+             * An object whose keys and values are used to create the named exports of the mock module.
+             *
+             * If the mock is a CommonJS or builtin module, these values are copied onto `module.exports`.
+             * Therefore, if a mock is created with both named exports and a non-object default export,
+             * the mock will throw an exception when used as a CJS or builtin module.
+             */
+            namedExports?: object | undefined;
+        }
+        /**
+         * The `MockTracker` class is used to manage mocking functionality. The test runner
+         * module provides a top level `mock` export which is a `MockTracker` instance.
+         * Each test also provides its own `MockTracker` instance via the test context's `mock` property.
+         * @since v19.1.0, v18.13.0
+         */
+        interface MockTracker {
+            /**
+             * This function is used to create a mock function.
+             *
+             * The following example creates a mock function that increments a counter by one
+             * on each invocation. The `times` option is used to modify the mock behavior such
+             * that the first two invocations add two to the counter instead of one.
+             *
+             * ```js
+             * test('mocks a counting function', (t) => {
+             *   let cnt = 0;
+             *
+             *   function addOne() {
+             *     cnt++;
+             *     return cnt;
+             *   }
+             *
+             *   function addTwo() {
+             *     cnt += 2;
+             *     return cnt;
+             *   }
+             *
+             *   const fn = t.mock.fn(addOne, addTwo, { times: 2 });
+             *
+             *   assert.strictEqual(fn(), 2);
+             *   assert.strictEqual(fn(), 4);
+             *   assert.strictEqual(fn(), 5);
+             *   assert.strictEqual(fn(), 6);
+             * });
+             * ```
+             * @since v19.1.0, v18.13.0
+             * @param original An optional function to create a mock on.
+             * @param implementation An optional function used as the mock implementation for `original`. This is useful for creating mocks that exhibit one behavior for a specified number of calls and
+             * then restore the behavior of `original`.
+             * @param options Optional configuration options for the mock function.
+             * @return The mocked function. The mocked function contains a special `mock` property, which is an instance of {@link MockFunctionContext}, and can be used for inspecting and changing the
+             * behavior of the mocked function.
+             */
+            fn<F extends Function = (...args: any[]) => undefined>(
+                original?: F,
+                options?: MockFunctionOptions,
+            ): Mock<F>;
+            fn<F extends Function = (...args: any[]) => undefined, Implementation extends Function = F>(
+                original?: F,
+                implementation?: Implementation,
+                options?: MockFunctionOptions,
+            ): Mock<F | Implementation>;
+            /**
+             * This function is used to create a mock on an existing object method. The
+             * following example demonstrates how a mock is created on an existing object
+             * method.
+             *
+             * ```js
+             * test('spies on an object method', (t) => {
+             *   const number = {
+             *     value: 5,
+             *     subtract(a) {
+             *       return this.value - a;
+             *     },
+             *   };
+             *
+             *   t.mock.method(number, 'subtract');
+             *   assert.strictEqual(number.subtract.mock.calls.length, 0);
+             *   assert.strictEqual(number.subtract(3), 2);
+             *   assert.strictEqual(number.subtract.mock.calls.length, 1);
+             *
+             *   const call = number.subtract.mock.calls[0];
+             *
+             *   assert.deepStrictEqual(call.arguments, [3]);
+             *   assert.strictEqual(call.result, 2);
+             *   assert.strictEqual(call.error, undefined);
+             *   assert.strictEqual(call.target, undefined);
+             *   assert.strictEqual(call.this, number);
+             * });
+             * ```
+             * @since v19.1.0, v18.13.0
+             * @param object The object whose method is being mocked.
+             * @param methodName The identifier of the method on `object` to mock. If `object[methodName]` is not a function, an error is thrown.
+             * @param implementation An optional function used as the mock implementation for `object[methodName]`.
+             * @param options Optional configuration options for the mock method.
+             * @return The mocked method. The mocked method contains a special `mock` property, which is an instance of {@link MockFunctionContext}, and can be used for inspecting and changing the
+             * behavior of the mocked method.
+             */
+            method<
+                MockedObject extends object,
+                MethodName extends FunctionPropertyNames<MockedObject>,
+            >(
+                object: MockedObject,
+                methodName: MethodName,
+                options?: MockFunctionOptions,
+            ): MockedObject[MethodName] extends Function ? Mock<MockedObject[MethodName]>
+                : never;
+            method<
+                MockedObject extends object,
+                MethodName extends FunctionPropertyNames<MockedObject>,
+                Implementation extends Function,
+            >(
+                object: MockedObject,
+                methodName: MethodName,
+                implementation: Implementation,
+                options?: MockFunctionOptions,
+            ): MockedObject[MethodName] extends Function ? Mock<MockedObject[MethodName] | Implementation>
+                : never;
+            method<MockedObject extends object>(
+                object: MockedObject,
+                methodName: keyof MockedObject,
+                options: MockMethodOptions,
+            ): Mock<Function>;
+            method<MockedObject extends object>(
+                object: MockedObject,
+                methodName: keyof MockedObject,
+                implementation: Function,
+                options: MockMethodOptions,
+            ): Mock<Function>;
+            /**
+             * This function is syntax sugar for `MockTracker.method` with `options.getter` set to `true`.
+             * @since v19.3.0, v18.13.0
+             */
+            getter<
+                MockedObject extends object,
+                MethodName extends keyof MockedObject,
+            >(
+                object: MockedObject,
+                methodName: MethodName,
+                options?: MockFunctionOptions,
+            ): Mock<() => MockedObject[MethodName]>;
+            getter<
+                MockedObject extends object,
+                MethodName extends keyof MockedObject,
+                Implementation extends Function,
+            >(
+                object: MockedObject,
+                methodName: MethodName,
+                implementation?: Implementation,
+                options?: MockFunctionOptions,
+            ): Mock<(() => MockedObject[MethodName]) | Implementation>;
+            /**
+             * This function is syntax sugar for `MockTracker.method` with `options.setter` set to `true`.
+             * @since v19.3.0, v18.13.0
+             */
+            setter<
+                MockedObject extends object,
+                MethodName extends keyof MockedObject,
+            >(
+                object: MockedObject,
+                methodName: MethodName,
+                options?: MockFunctionOptions,
+            ): Mock<(value: MockedObject[MethodName]) => void>;
+            setter<
+                MockedObject extends object,
+                MethodName extends keyof MockedObject,
+                Implementation extends Function,
+            >(
+                object: MockedObject,
+                methodName: MethodName,
+                implementation?: Implementation,
+                options?: MockFunctionOptions,
+            ): Mock<((value: MockedObject[MethodName]) => void) | Implementation>;
+            /**
+             * This function is used to mock the exports of ECMAScript modules, CommonJS modules, JSON modules, and
+             * Node.js builtin modules. Any references to the original module prior to mocking are not impacted. In
+             * order to enable module mocking, Node.js must be started with the
+             * [`--experimental-test-module-mocks`](https://nodejs.org/docs/latest-v25.x/api/cli.html#--experimental-test-module-mocks)
+             * command-line flag.
+             *
+             * The following example demonstrates how a mock is created for a module.
+             *
+             * ```js
+             * test('mocks a builtin module in both module systems', async (t) => {
+             *   // Create a mock of 'node:readline' with a named export named 'fn', which
+             *   // does not exist in the original 'node:readline' module.
+             *   const mock = t.mock.module('node:readline', {
+             *     namedExports: { fn() { return 42; } },
+             *   });
+             *
+             *   let esmImpl = await import('node:readline');
+             *   let cjsImpl = require('node:readline');
+             *
+             *   // cursorTo() is an export of the original 'node:readline' module.
+             *   assert.strictEqual(esmImpl.cursorTo, undefined);
+             *   assert.strictEqual(cjsImpl.cursorTo, undefined);
+             *   assert.strictEqual(esmImpl.fn(), 42);
+             *   assert.strictEqual(cjsImpl.fn(), 42);
+             *
+             *   mock.restore();
+             *
+             *   // The mock is restored, so the original builtin module is returned.
+             *   esmImpl = await import('node:readline');
+             *   cjsImpl = require('node:readline');
+             *
+             *   assert.strictEqual(typeof esmImpl.cursorTo, 'function');
+             *   assert.strictEqual(typeof cjsImpl.cursorTo, 'function');
+             *   assert.strictEqual(esmImpl.fn, undefined);
+             *   assert.strictEqual(cjsImpl.fn, undefined);
+             * });
+             * ```
+             * @since v22.3.0
+             * @experimental
+             * @param specifier A string identifying the module to mock.
+             * @param options Optional configuration options for the mock module.
+             */
+            module(specifier: string | URL, options?: MockModuleOptions): MockModuleContext;
+            /**
+             * Creates a mock for a property value on an object. This allows you to track and control access to a specific property,
+             * including how many times it is read (getter) or written (setter), and to restore the original value after mocking.
+             *
+             * ```js
+             * test('mocks a property value', (t) => {
+             *   const obj = { foo: 42 };
+             *   const prop = t.mock.property(obj, 'foo', 100);
+             *
+             *   assert.strictEqual(obj.foo, 100);
+             *   assert.strictEqual(prop.mock.accessCount(), 1);
+             *   assert.strictEqual(prop.mock.accesses[0].type, 'get');
+             *   assert.strictEqual(prop.mock.accesses[0].value, 100);
+             *
+             *   obj.foo = 200;
+             *   assert.strictEqual(prop.mock.accessCount(), 2);
+             *   assert.strictEqual(prop.mock.accesses[1].type, 'set');
+             *   assert.strictEqual(prop.mock.accesses[1].value, 200);
+             *
+             *   prop.mock.restore();
+             *   assert.strictEqual(obj.foo, 42);
+             * });
+             * ```
+             * @since v24.3.0
+             * @param object The object whose value is being mocked.
+             * @param propertyName The identifier of the property on `object` to mock.
+             * @param value An optional value used as the mock value
+             * for `object[propertyName]`. **Default:** The original property value.
+             * @returns A proxy to the mocked object. The mocked object contains a
+             * special `mock` property, which is an instance of [`MockPropertyContext`][], and
+             * can be used for inspecting and changing the behavior of the mocked property.
+             */
+            property<
+                MockedObject extends object,
+                PropertyName extends keyof MockedObject,
+            >(
+                object: MockedObject,
+                property: PropertyName,
+                value?: MockedObject[PropertyName],
+            ): MockedObject & { mock: MockPropertyContext<MockedObject[PropertyName]> };
+            /**
+             * This function restores the default behavior of all mocks that were previously
+             * created by this `MockTracker` and disassociates the mocks from the `MockTracker` instance. Once disassociated, the mocks can still be used, but the `MockTracker` instance can no longer be
+             * used to reset their behavior or
+             * otherwise interact with them.
+             *
+             * After each test completes, this function is called on the test context's `MockTracker`. If the global `MockTracker` is used extensively, calling this
+             * function manually is recommended.
+             * @since v19.1.0, v18.13.0
+             */
+            reset(): void;
+            /**
+             * This function restores the default behavior of all mocks that were previously
+             * created by this `MockTracker`. Unlike `mock.reset()`, `mock.restoreAll()` does
+             * not disassociate the mocks from the `MockTracker` instance.
+             * @since v19.1.0, v18.13.0
+             */
+            restoreAll(): void;
+            readonly timers: MockTimers;
+        }
+        const mock: MockTracker;
+        interface MockFunctionCall<
+            F extends Function,
+            ReturnType = F extends (...args: any) => infer T ? T
+                : F extends abstract new(...args: any) => infer T ? T
+                : unknown,
+            Args = F extends (...args: infer Y) => any ? Y
+                : F extends abstract new(...args: infer Y) => any ? Y
+                : unknown[],
+        > {
+            /**
+             * An array of the arguments passed to the mock function.
+             */
+            arguments: Args;
+            /**
+             * If the mocked function threw then this property contains the thrown value.
+             */
+            error: unknown | undefined;
+            /**
+             * The value returned by the mocked function.
+             *
+             * If the mocked function threw, it will be `undefined`.
+             */
+            result: ReturnType | undefined;
+            /**
+             * An `Error` object whose stack can be used to determine the callsite of the mocked function invocation.
+             */
+            stack: Error;
+            /**
+             * If the mocked function is a constructor, this field contains the class being constructed.
+             * Otherwise this will be `undefined`.
+             */
+            target: F extends abstract new(...args: any) => any ? F : undefined;
+            /**
+             * The mocked function's `this` value.
+             */
+            this: unknown;
+        }
+        /**
+         * The `MockFunctionContext` class is used to inspect or manipulate the behavior of
+         * mocks created via the `MockTracker` APIs.
+         * @since v19.1.0, v18.13.0
+         */
+        interface MockFunctionContext<F extends Function> {
+            /**
+             * A getter that returns a copy of the internal array used to track calls to the
+             * mock. Each entry in the array is an object with the following properties.
+             * @since v19.1.0, v18.13.0
+             */
+            readonly calls: MockFunctionCall<F>[];
+            /**
+             * This function returns the number of times that this mock has been invoked. This
+             * function is more efficient than checking `ctx.calls.length` because `ctx.calls` is a getter that creates a copy of the internal call tracking array.
+             * @since v19.1.0, v18.13.0
+             * @return The number of times that this mock has been invoked.
+             */
+            callCount(): number;
+            /**
+             * This function is used to change the behavior of an existing mock.
+             *
+             * The following example creates a mock function using `t.mock.fn()`, calls the
+             * mock function, and then changes the mock implementation to a different function.
+             *
+             * ```js
+             * test('changes a mock behavior', (t) => {
+             *   let cnt = 0;
+             *
+             *   function addOne() {
+             *     cnt++;
+             *     return cnt;
+             *   }
+             *
+             *   function addTwo() {
+             *     cnt += 2;
+             *     return cnt;
+             *   }
+             *
+             *   const fn = t.mock.fn(addOne);
+             *
+             *   assert.strictEqual(fn(), 1);
+             *   fn.mock.mockImplementation(addTwo);
+             *   assert.strictEqual(fn(), 3);
+             *   assert.strictEqual(fn(), 5);
+             * });
+             * ```
+             * @since v19.1.0, v18.13.0
+             * @param implementation The function to be used as the mock's new implementation.
+             */
+            mockImplementation(implementation: F): void;
+            /**
+             * This function is used to change the behavior of an existing mock for a single
+             * invocation. Once invocation `onCall` has occurred, the mock will revert to
+             * whatever behavior it would have used had `mockImplementationOnce()` not been
+             * called.
+             *
+             * The following example creates a mock function using `t.mock.fn()`, calls the
+             * mock function, changes the mock implementation to a different function for the
+             * next invocation, and then resumes its previous behavior.
+             *
+             * ```js
+             * test('changes a mock behavior once', (t) => {
+             *   let cnt = 0;
+             *
+             *   function addOne() {
+             *     cnt++;
+             *     return cnt;
+             *   }
+             *
+             *   function addTwo() {
+             *     cnt += 2;
+             *     return cnt;
+             *   }
+             *
+             *   const fn = t.mock.fn(addOne);
+             *
+             *   assert.strictEqual(fn(), 1);
+             *   fn.mock.mockImplementationOnce(addTwo);
+             *   assert.strictEqual(fn(), 3);
+             *   assert.strictEqual(fn(), 4);
+             * });
+             * ```
+             * @since v19.1.0, v18.13.0
+             * @param implementation The function to be used as the mock's implementation for the invocation number specified by `onCall`.
+             * @param onCall The invocation number that will use `implementation`. If the specified invocation has already occurred then an exception is thrown.
+             */
+            mockImplementationOnce(implementation: F, onCall?: number): void;
+            /**
+             * Resets the call history of the mock function.
+             * @since v19.3.0, v18.13.0
+             */
+            resetCalls(): void;
+            /**
+             * Resets the implementation of the mock function to its original behavior. The
+             * mock can still be used after calling this function.
+             * @since v19.1.0, v18.13.0
+             */
+            restore(): void;
+        }
+        /**
+         * @since v22.3.0
+         * @experimental
+         */
+        interface MockModuleContext {
+            /**
+             * Resets the implementation of the mock module.
+             * @since v22.3.0
+             */
+            restore(): void;
+        }
+        /**
+         * @since v24.3.0
+         */
+        class MockPropertyContext<PropertyType = any> {
+            /**
+             * A getter that returns a copy of the internal array used to track accesses (get/set) to
+             * the mocked property. Each entry in the array is an object with the following properties:
+             */
+            readonly accesses: Array<{
+                type: "get" | "set";
+                value: PropertyType;
+                stack: Error;
+            }>;
+            /**
+             * This function returns the number of times that the property was accessed.
+             * This function is more efficient than checking `ctx.accesses.length` because
+             * `ctx.accesses` is a getter that creates a copy of the internal access tracking array.
+             * @returns The number of times that the property was accessed (read or written).
+             */
+            accessCount(): number;
+            /**
+             * This function is used to change the value returned by the mocked property getter.
+             * @param value The new value to be set as the mocked property value.
+             */
+            mockImplementation(value: PropertyType): void;
+            /**
+             * This function is used to change the behavior of an existing mock for a single
+             * invocation. Once invocation `onAccess` has occurred, the mock will revert to
+             * whatever behavior it would have used had `mockImplementationOnce()` not been
+             * called.
+             *
+             * The following example creates a mock function using `t.mock.property()`, calls the
+             * mock property, changes the mock implementation to a different value for the
+             * next invocation, and then resumes its previous behavior.
+             *
+             * ```js
+             * test('changes a mock behavior once', (t) => {
+             *   const obj = { foo: 1 };
+             *
+             *   const prop = t.mock.property(obj, 'foo', 5);
+             *
+             *   assert.strictEqual(obj.foo, 5);
+             *   prop.mock.mockImplementationOnce(25);
+             *   assert.strictEqual(obj.foo, 25);
+             *   assert.strictEqual(obj.foo, 5);
+             * });
+             * ```
+             * @param value The value to be used as the mock's
+             * implementation for the invocation number specified by `onAccess`.
+             * @param onAccess The invocation number that will use `value`. If
+             * the specified invocation has already occurred then an exception is thrown.
+             * **Default:** The number of the next invocation.
+             */
+            mockImplementationOnce(value: PropertyType, onAccess?: number): void;
+            /**
+             * Resets the access history of the mocked property.
+             */
+            resetAccesses(): void;
+            /**
+             * Resets the implementation of the mock property to its original behavior. The
+             * mock can still be used after calling this function.
+             */
+            restore(): void;
+        }
+        interface MockTimersOptions {
+            apis: ReadonlyArray<"setInterval" | "setTimeout" | "setImmediate" | "Date">;
+            now?: number | Date | undefined;
+        }
+        /**
+         * Mocking timers is a technique commonly used in software testing to simulate and
+         * control the behavior of timers, such as `setInterval` and `setTimeout`,
+         * without actually waiting for the specified time intervals.
+         *
+         * The MockTimers API also allows for mocking of the `Date` constructor and
+         * `setImmediate`/`clearImmediate` functions.
+         *
+         * The `MockTracker` provides a top-level `timers` export
+         * which is a `MockTimers` instance.
+         * @since v20.4.0
+         */
+        interface MockTimers {
+            /**
+             * Enables timer mocking for the specified timers.
+             *
+             * **Note:** When you enable mocking for a specific timer, its associated
+             * clear function will also be implicitly mocked.
+             *
+             * **Note:** Mocking `Date` will affect the behavior of the mocked timers
+             * as they use the same internal clock.
+             *
+             * Example usage without setting initial time:
+             *
+             * ```js
+             * import { mock } from 'node:test';
+             * mock.timers.enable({ apis: ['setInterval', 'Date'], now: 1234 });
+             * ```
+             *
+             * The above example enables mocking for the `Date` constructor, `setInterval` timer and
+             * implicitly mocks the `clearInterval` function. Only the `Date` constructor from `globalThis`,
+             * `setInterval` and `clearInterval` functions from `node:timers`, `node:timers/promises`, and `globalThis` will be mocked.
+             *
+             * Example usage with initial time set
+             *
+             * ```js
+             * import { mock } from 'node:test';
+             * mock.timers.enable({ apis: ['Date'], now: 1000 });
+             * ```
+             *
+             * Example usage with initial Date object as time set
+             *
+             * ```js
+             * import { mock } from 'node:test';
+             * mock.timers.enable({ apis: ['Date'], now: new Date() });
+             * ```
+             *
+             * Alternatively, if you call `mock.timers.enable()` without any parameters:
+             *
+             * All timers (`'setInterval'`, `'clearInterval'`, `'Date'`, `'setImmediate'`, `'clearImmediate'`, `'setTimeout'`, and `'clearTimeout'`)
+             * will be mocked.
+             *
+             * The `setInterval`, `clearInterval`, `setTimeout`, and `clearTimeout` functions from `node:timers`, `node:timers/promises`,
+             * and `globalThis` will be mocked.
+             * The `Date` constructor from `globalThis` will be mocked.
+             *
+             * If there is no initial epoch set, the initial date will be based on 0 in the Unix epoch. This is `January 1st, 1970, 00:00:00 UTC`. You can
+             * set an initial date by passing a now property to the `.enable()` method. This value will be used as the initial date for the mocked Date
+             * object. It can either be a positive integer, or another Date object.
+             * @since v20.4.0
+             */
+            enable(options?: MockTimersOptions): void;
+            /**
+             * Sets the current Unix timestamp that will be used as reference for any mocked
+             * `Date` objects.
+             *
+             * ```js
+             * import assert from 'node:assert';
+             * import { test } from 'node:test';
+             *
+             * test('runAll functions following the given order', (context) => {
+             *   const now = Date.now();
+             *   const setTime = 1000;
+             *   // Date.now is not mocked
+             *   assert.deepStrictEqual(Date.now(), now);
+             *
+             *   context.mock.timers.enable({ apis: ['Date'] });
+             *   context.mock.timers.setTime(setTime);
+             *   // Date.now is now 1000
+             *   assert.strictEqual(Date.now(), setTime);
+             * });
+             * ```
+             * @since v21.2.0, v20.11.0
+             */
+            setTime(milliseconds: number): void;
+            /**
+             * This function restores the default behavior of all mocks that were previously
+             * created by this `MockTimers` instance and disassociates the mocks
+             * from the `MockTracker` instance.
+             *
+             * **Note:** After each test completes, this function is called on
+             * the test context's `MockTracker`.
+             *
+             * ```js
+             * import { mock } from 'node:test';
+             * mock.timers.reset();
+             * ```
+             * @since v20.4.0
+             */
+            reset(): void;
+            /**
+             * Advances time for all mocked timers.
+             *
+             * **Note:** This diverges from how `setTimeout` in Node.js behaves and accepts
+             * only positive numbers. In Node.js, `setTimeout` with negative numbers is
+             * only supported for web compatibility reasons.
+             *
+             * The following example mocks a `setTimeout` function and
+             * by using `.tick` advances in
+             * time triggering all pending timers.
+             *
+             * ```js
+             * import assert from 'node:assert';
+             * import { test } from 'node:test';
+             *
+             * test('mocks setTimeout to be executed synchronously without having to actually wait for it', (context) => {
+             *   const fn = context.mock.fn();
+             *
+             *   context.mock.timers.enable({ apis: ['setTimeout'] });
+             *
+             *   setTimeout(fn, 9999);
+             *
+             *   assert.strictEqual(fn.mock.callCount(), 0);
+             *
+             *   // Advance in time
+             *   context.mock.timers.tick(9999);
+             *
+             *   assert.strictEqual(fn.mock.callCount(), 1);
+             * });
+             * ```
+             *
+             * Alternativelly, the `.tick` function can be called many times
+             *
+             * ```js
+             * import assert from 'node:assert';
+             * import { test } from 'node:test';
+             *
+             * test('mocks setTimeout to be executed synchronously without having to actually wait for it', (context) => {
+             *   const fn = context.mock.fn();
+             *   context.mock.timers.enable({ apis: ['setTimeout'] });
+             *   const nineSecs = 9000;
+             *   setTimeout(fn, nineSecs);
+             *
+             *   const twoSeconds = 3000;
+             *   context.mock.timers.tick(twoSeconds);
+             *   context.mock.timers.tick(twoSeconds);
+             *   context.mock.timers.tick(twoSeconds);
+             *
+             *   assert.strictEqual(fn.mock.callCount(), 1);
+             * });
+             * ```
+             *
+             * Advancing time using `.tick` will also advance the time for any `Date` object
+             * created after the mock was enabled (if `Date` was also set to be mocked).
+             *
+             * ```js
+             * import assert from 'node:assert';
+             * import { test } from 'node:test';
+             *
+             * test('mocks setTimeout to be executed synchronously without having to actually wait for it', (context) => {
+             *   const fn = context.mock.fn();
+             *
+             *   context.mock.timers.enable({ apis: ['setTimeout', 'Date'] });
+             *   setTimeout(fn, 9999);
+             *
+             *   assert.strictEqual(fn.mock.callCount(), 0);
+             *   assert.strictEqual(Date.now(), 0);
+             *
+             *   // Advance in time
+             *   context.mock.timers.tick(9999);
+             *   assert.strictEqual(fn.mock.callCount(), 1);
+             *   assert.strictEqual(Date.now(), 9999);
+             * });
+             * ```
+             * @since v20.4.0
+             */
+            tick(milliseconds: number): void;
+            /**
+             * Triggers all pending mocked timers immediately. If the `Date` object is also
+             * mocked, it will also advance the `Date` object to the furthest timer's time.
+             *
+             * The example below triggers all pending timers immediately,
+             * causing them to execute without any delay.
+             *
+             * ```js
+             * import assert from 'node:assert';
+             * import { test } from 'node:test';
+             *
+             * test('runAll functions following the given order', (context) => {
+             *   context.mock.timers.enable({ apis: ['setTimeout', 'Date'] });
+             *   const results = [];
+             *   setTimeout(() => results.push(1), 9999);
+             *
+             *   // Notice that if both timers have the same timeout,
+             *   // the order of execution is guaranteed
+             *   setTimeout(() => results.push(3), 8888);
+             *   setTimeout(() => results.push(2), 8888);
+             *
+             *   assert.deepStrictEqual(results, []);
+             *
+             *   context.mock.timers.runAll();
+             *   assert.deepStrictEqual(results, [3, 2, 1]);
+             *   // The Date object is also advanced to the furthest timer's time
+             *   assert.strictEqual(Date.now(), 9999);
+             * });
+             * ```
+             *
+             * **Note:** The `runAll()` function is specifically designed for
+             * triggering timers in the context of timer mocking.
+             * It does not have any effect on real-time system
+             * clocks or actual timers outside of the mocking environment.
+             * @since v20.4.0
+             */
+            runAll(): void;
+            /**
+             * Calls {@link MockTimers.reset()}.
+             */
+            [Symbol.dispose](): void;
+        }
+        /**
+         * An object whose methods are used to configure available assertions on the
+         * `TestContext` objects in the current process. The methods from `node:assert`
+         * and snapshot testing functions are available by default.
+         *
+         * It is possible to apply the same configuration to all files by placing common
+         * configuration code in a module
+         * preloaded with `--require` or `--import`.
+         * @since v22.14.0
+         */
+        namespace assert {
+            /**
+             * Defines a new assertion function with the provided name and function. If an
+             * assertion already exists with the same name, it is overwritten.
+             * @since v22.14.0
+             */
+            function register(name: string, fn: (this: TestContext, ...args: any[]) => void): void;
+        }
+        /**
+         * @since v22.3.0
+         */
+        namespace snapshot {
+            /**
+             * This function is used to customize the default serialization mechanism used by the test runner.
+             *
+             * By default, the test runner performs serialization by calling `JSON.stringify(value, null, 2)` on the provided value.
+             * `JSON.stringify()` does have limitations regarding circular structures and supported data types.
+             * If a more robust serialization mechanism is required, this function should be used to specify a list of custom serializers.
+             *
+             * Serializers are called in order, with the output of the previous serializer passed as input to the next.
+             * The final result must be a string value.
+             * @since v22.3.0
+             * @param serializers An array of synchronous functions used as the default serializers for snapshot tests.
+             */
+            function setDefaultSnapshotSerializers(serializers: ReadonlyArray<(value: any) => any>): void;
+            /**
+             * This function is used to set a custom resolver for the location of the snapshot file used for snapshot testing.
+             * By default, the snapshot filename is the same as the entry point filename with `.snapshot` appended.
+             * @since v22.3.0
+             * @param fn A function used to compute the location of the snapshot file.
+             * The function receives the path of the test file as its only argument. If the
+             * test is not associated with a file (for example in the REPL), the input is
+             * undefined. `fn()` must return a string specifying the location of the snapshot file.
+             */
+            function setResolveSnapshotPath(fn: (path: string | undefined) => string): void;
+        }
+    }
+    type FunctionPropertyNames<T> = {
+        [K in keyof T]: T[K] extends Function ? K : never;
+    }[keyof T];
+    export = test;
+}
diff --git a/mqtt-backend/node_modules/@types/node/test/reporters.d.ts b/mqtt-backend/node_modules/@types/node/test/reporters.d.ts
new file mode 100644
index 0000000..e04d669
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/test/reporters.d.ts
@@ -0,0 +1,58 @@
+declare module "node:test/reporters" {
+    import { Transform, TransformOptions } from "node:stream";
+    import { EventData } from "node:test";
+    type TestEvent =
+        | { type: "test:coverage"; data: EventData.TestCoverage }
+        | { type: "test:complete"; data: EventData.TestComplete }
+        | { type: "test:dequeue"; data: EventData.TestDequeue }
+        | { type: "test:diagnostic"; data: EventData.TestDiagnostic }
+        | { type: "test:enqueue"; data: EventData.TestEnqueue }
+        | { type: "test:fail"; data: EventData.TestFail }
+        | { type: "test:pass"; data: EventData.TestPass }
+        | { type: "test:plan"; data: EventData.TestPlan }
+        | { type: "test:start"; data: EventData.TestStart }
+        | { type: "test:stderr"; data: EventData.TestStderr }
+        | { type: "test:stdout"; data: EventData.TestStdout }
+        | { type: "test:summary"; data: EventData.TestSummary }
+        | { type: "test:watch:drained"; data: undefined }
+        | { type: "test:watch:restarted"; data: undefined };
+    interface ReporterConstructorWrapper<T extends new(...args: any[]) => Transform> {
+        new(...args: ConstructorParameters<T>): InstanceType<T>;
+        (...args: ConstructorParameters<T>): InstanceType<T>;
+    }
+    /**
+     * The `dot` reporter outputs the test results in a compact format,
+     * where each passing test is represented by a `.`,
+     * and each failing test is represented by a `X`.
+     * @since v20.0.0
+     */
+    function dot(source: AsyncIterable<TestEvent>): NodeJS.AsyncIterator<string>;
+    /**
+     * The `tap` reporter outputs the test results in the [TAP](https://testanything.org/) format.
+     * @since v20.0.0
+     */
+    function tap(source: AsyncIterable<TestEvent>): NodeJS.AsyncIterator<string>;
+    class SpecReporter extends Transform {
+        constructor();
+    }
+    /**
+     * The `spec` reporter outputs the test results in a human-readable format.
+     * @since v20.0.0
+     */
+    const spec: ReporterConstructorWrapper<typeof SpecReporter>;
+    /**
+     * The `junit` reporter outputs test results in a jUnit XML format.
+     * @since v21.0.0
+     */
+    function junit(source: AsyncIterable<TestEvent>): NodeJS.AsyncIterator<string>;
+    class LcovReporter extends Transform {
+        constructor(options?: Omit<TransformOptions, "writableObjectMode">);
+    }
+    /**
+     * The `lcov` reporter outputs test coverage when used with the
+     * [`--experimental-test-coverage`](https://nodejs.org/docs/latest-v25.x/api/cli.html#--experimental-test-coverage) flag.
+     * @since v22.0.0
+     */
+    const lcov: ReporterConstructorWrapper<typeof LcovReporter>;
+    export { dot, junit, lcov, spec, tap, TestEvent };
+}
diff --git a/mqtt-backend/node_modules/@types/node/timers.d.ts b/mqtt-backend/node_modules/@types/node/timers.d.ts
new file mode 100644
index 0000000..5b74b89
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/timers.d.ts
@@ -0,0 +1,149 @@
+declare module "node:timers" {
+    import { Abortable } from "node:events";
+    import * as promises from "node:timers/promises";
+    export interface TimerOptions extends Abortable {
+        /**
+         * Set to `false` to indicate that the scheduled `Timeout`
+         * should not require the Node.js event loop to remain active.
+         * @default true
+         */
+        ref?: boolean | undefined;
+    }
+    global {
+        namespace NodeJS {
+            /**
+             * This object is created internally and is returned from `setImmediate()`. It
+             * can be passed to `clearImmediate()` in order to cancel the scheduled
+             * actions.
+             *
+             * By default, when an immediate is scheduled, the Node.js event loop will continue
+             * running as long as the immediate is active. The `Immediate` object returned by
+             * `setImmediate()` exports both `immediate.ref()` and `immediate.unref()`
+             * functions that can be used to control this default behavior.
+             */
+            interface Immediate extends RefCounted, Disposable {
+                /**
+                 * If true, the `Immediate` object will keep the Node.js event loop active.
+                 * @since v11.0.0
+                 */
+                hasRef(): boolean;
+                /**
+                 * When called, requests that the Node.js event loop _not_ exit so long as the
+                 * `Immediate` is active. Calling `immediate.ref()` multiple times will have no
+                 * effect.
+                 *
+                 * By default, all `Immediate` objects are "ref'ed", making it normally unnecessary
+                 * to call `immediate.ref()` unless `immediate.unref()` had been called previously.
+                 * @since v9.7.0
+                 * @returns a reference to `immediate`
+                 */
+                ref(): this;
+                /**
+                 * When called, the active `Immediate` object will not require the Node.js event
+                 * loop to remain active. If there is no other activity keeping the event loop
+                 * running, the process may exit before the `Immediate` object's callback is
+                 * invoked. Calling `immediate.unref()` multiple times will have no effect.
+                 * @since v9.7.0
+                 * @returns a reference to `immediate`
+                 */
+                unref(): this;
+                /**
+                 * Cancels the immediate. This is similar to calling `clearImmediate()`.
+                 * @since v20.5.0, v18.18.0
+                 */
+                [Symbol.dispose](): void;
+                _onImmediate(...args: any[]): void;
+            }
+            // Legacy interface used in Node.js v9 and prior
+            // TODO: remove in a future major version bump
+            /** @deprecated Use `NodeJS.Timeout` instead. */
+            interface Timer extends RefCounted {
+                hasRef(): boolean;
+                refresh(): this;
+                [Symbol.toPrimitive](): number;
+            }
+            /**
+             * This object is created internally and is returned from `setTimeout()` and
+             * `setInterval()`. It can be passed to either `clearTimeout()` or
+             * `clearInterval()` in order to cancel the scheduled actions.
+             *
+             * By default, when a timer is scheduled using either `setTimeout()` or
+             * `setInterval()`, the Node.js event loop will continue running as long as the
+             * timer is active. Each of the `Timeout` objects returned by these functions
+             * export both `timeout.ref()` and `timeout.unref()` functions that can be used to
+             * control this default behavior.
+             */
+            interface Timeout extends RefCounted, Disposable, Timer {
+                /**
+                 * Cancels the timeout.
+                 * @since v0.9.1
+                 * @legacy Use `clearTimeout()` instead.
+                 * @returns a reference to `timeout`
+                 */
+                close(): this;
+                /**
+                 * If true, the `Timeout` object will keep the Node.js event loop active.
+                 * @since v11.0.0
+                 */
+                hasRef(): boolean;
+                /**
+                 * When called, requests that the Node.js event loop _not_ exit so long as the
+                 * `Timeout` is active. Calling `timeout.ref()` multiple times will have no effect.
+                 *
+                 * By default, all `Timeout` objects are "ref'ed", making it normally unnecessary
+                 * to call `timeout.ref()` unless `timeout.unref()` had been called previously.
+                 * @since v0.9.1
+                 * @returns a reference to `timeout`
+                 */
+                ref(): this;
+                /**
+                 * Sets the timer's start time to the current time, and reschedules the timer to
+                 * call its callback at the previously specified duration adjusted to the current
+                 * time. This is useful for refreshing a timer without allocating a new
+                 * JavaScript object.
+                 *
+                 * Using this on a timer that has already called its callback will reactivate the
+                 * timer.
+                 * @since v10.2.0
+                 * @returns a reference to `timeout`
+                 */
+                refresh(): this;
+                /**
+                 * When called, the active `Timeout` object will not require the Node.js event loop
+                 * to remain active. If there is no other activity keeping the event loop running,
+                 * the process may exit before the `Timeout` object's callback is invoked. Calling
+                 * `timeout.unref()` multiple times will have no effect.
+                 * @since v0.9.1
+                 * @returns a reference to `timeout`
+                 */
+                unref(): this;
+                /**
+                 * Coerce a `Timeout` to a primitive. The primitive can be used to
+                 * clear the `Timeout`. The primitive can only be used in the
+                 * same thread where the timeout was created. Therefore, to use it
+                 * across `worker_threads` it must first be passed to the correct
+                 * thread. This allows enhanced compatibility with browser
+                 * `setTimeout()` and `setInterval()` implementations.
+                 * @since v14.9.0, v12.19.0
+                 */
+                [Symbol.toPrimitive](): number;
+                /**
+                 * Cancels the timeout.
+                 * @since v20.5.0, v18.18.0
+                 */
+                [Symbol.dispose](): void;
+                _onTimeout(...args: any[]): void;
+            }
+        }
+    }
+    import clearImmediate = globalThis.clearImmediate;
+    import clearInterval = globalThis.clearInterval;
+    import clearTimeout = globalThis.clearTimeout;
+    import setImmediate = globalThis.setImmediate;
+    import setInterval = globalThis.setInterval;
+    import setTimeout = globalThis.setTimeout;
+    export { clearImmediate, clearInterval, clearTimeout, promises, setImmediate, setInterval, setTimeout };
+}
+declare module "timers" {
+    export * from "node:timers";
+}
diff --git a/mqtt-backend/node_modules/@types/node/timers/promises.d.ts b/mqtt-backend/node_modules/@types/node/timers/promises.d.ts
new file mode 100644
index 0000000..8e178ea
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/timers/promises.d.ts
@@ -0,0 +1,93 @@
+declare module "node:timers/promises" {
+    import { TimerOptions } from "node:timers";
+    /**
+     * ```js
+     * import {
+     *   setTimeout,
+     * } from 'node:timers/promises';
+     *
+     * const res = await setTimeout(100, 'result');
+     *
+     * console.log(res);  // Prints 'result'
+     * ```
+     * @since v15.0.0
+     * @param delay The number of milliseconds to wait before fulfilling the
+     * promise. **Default:** `1`.
+     * @param value A value with which the promise is fulfilled.
+     */
+    function setTimeout<T = void>(delay?: number, value?: T, options?: TimerOptions): Promise<T>;
+    /**
+     * ```js
+     * import {
+     *   setImmediate,
+     * } from 'node:timers/promises';
+     *
+     * const res = await setImmediate('result');
+     *
+     * console.log(res);  // Prints 'result'
+     * ```
+     * @since v15.0.0
+     * @param value A value with which the promise is fulfilled.
+     */
+    function setImmediate<T = void>(value?: T, options?: TimerOptions): Promise<T>;
+    /**
+     * Returns an async iterator that generates values in an interval of `delay` ms.
+     * If `ref` is `true`, you need to call `next()` of async iterator explicitly
+     * or implicitly to keep the event loop alive.
+     *
+     * ```js
+     * import {
+     *   setInterval,
+     * } from 'node:timers/promises';
+     *
+     * const interval = 100;
+     * for await (const startTime of setInterval(interval, Date.now())) {
+     *   const now = Date.now();
+     *   console.log(now);
+     *   if ((now - startTime) > 1000)
+     *     break;
+     * }
+     * console.log(Date.now());
+     * ```
+     * @since v15.9.0
+     * @param delay The number of milliseconds to wait between iterations.
+     * **Default:** `1`.
+     * @param value A value with which the iterator returns.
+     */
+    function setInterval<T = void>(delay?: number, value?: T, options?: TimerOptions): NodeJS.AsyncIterator<T>;
+    interface Scheduler {
+        /**
+         * An experimental API defined by the [Scheduling APIs](https://github.com/WICG/scheduling-apis) draft specification
+         * being developed as a standard Web Platform API.
+         *
+         * Calling `timersPromises.scheduler.wait(delay, options)` is roughly equivalent
+         * to calling `timersPromises.setTimeout(delay, undefined, options)` except that
+         * the `ref` option is not supported.
+         *
+         * ```js
+         * import { scheduler } from 'node:timers/promises';
+         *
+         * await scheduler.wait(1000); // Wait one second before continuing
+         * ```
+         * @since v17.3.0, v16.14.0
+         * @experimental
+         * @param delay The number of milliseconds to wait before resolving the
+         * promise.
+         */
+        wait(delay: number, options?: { signal?: AbortSignal }): Promise<void>;
+        /**
+         * An experimental API defined by the [Scheduling APIs](https://github.com/WICG/scheduling-apis) draft specification
+         * being developed as a standard Web Platform API.
+         *
+         * Calling `timersPromises.scheduler.yield()` is equivalent to calling
+         * `timersPromises.setImmediate()` with no arguments.
+         * @since v17.3.0, v16.14.0
+         * @experimental
+         */
+        yield(): Promise<void>;
+    }
+    const scheduler: Scheduler;
+}
+declare module "timers/promises" {
+    export * from "node:timers/promises";
+}
diff --git a/mqtt-backend/node_modules/@types/node/tls.d.ts b/mqtt-backend/node_modules/@types/node/tls.d.ts
new file mode 100644
index 0000000..3efd2ae
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/tls.d.ts
@@ -0,0 +1,1193 @@
+declare module "node:tls" {
+    import { NonSharedBuffer } from "node:buffer";
+    import { X509Certificate } from "node:crypto";
+    import * as net from "node:net";
+    import * as stream from "stream";
+    const CLIENT_RENEG_LIMIT: number;
+    const CLIENT_RENEG_WINDOW: number;
+    interface Certificate extends NodeJS.Dict<string | string[]> {
+        /**
+         * Country code.
+         */
+        C?: string | string[];
+        /**
+         * Street.
+         */
+        ST?: string | string[];
+        /**
+         * Locality.
+         */
+        L?: string | string[];
+        /**
+         * Organization.
+         */
+        O?: string | string[];
+        /**
+         * Organizational unit.
+         */
+        OU?: string | string[];
+        /**
+         * Common name.
+         */
+        CN?: string | string[];
+    }
+    interface PeerCertificate {
+        /**
+         * `true` if a Certificate Authority (CA), `false` otherwise.
+         * @since v18.13.0
+         */
+        ca: boolean;
+        /**
+         * The DER encoded X.509 certificate data.
+         */
+        raw: NonSharedBuffer;
+        /**
+         * The certificate subject.
+         */
+        subject: Certificate;
+        /**
+         * The certificate issuer, described in the same terms as the `subject`.
+         */
+        issuer: Certificate;
+        /**
+         * The date-time the certificate is valid from.
+         */
+        valid_from: string;
+        /**
+         * The date-time the certificate is valid to.
+         */
+        valid_to: string;
+        /**
+         * The certificate serial number, as a hex string.
+         */
+        serialNumber: string;
+        /**
+         * The SHA-1 digest of the DER encoded certificate.
+         * It is returned as a `:` separated hexadecimal string.
+         */
+        fingerprint: string;
+        /**
+         * The SHA-256 digest of the DER encoded certificate.
+         * It is returned as a `:` separated hexadecimal string.
+         */
+        fingerprint256: string;
+        /**
+         * The SHA-512 digest of the DER encoded certificate.
+         * It is returned as a `:` separated hexadecimal string.
+         */
+        fingerprint512: string;
+        /**
+         * The extended key usage, a set of OIDs.
+         */
+        ext_key_usage?: string[];
+        /**
+         * A string containing concatenated names for the subject,
+         * an alternative to the `subject` names.
+         */
+        subjectaltname?: string;
+        /**
+         * An array describing the AuthorityInfoAccess, used with OCSP.
+         */
+        infoAccess?: NodeJS.Dict<string[]>;
+        /**
+         * For RSA keys: The RSA bit size.
+         *
+         * For EC keys: The key size in bits.
+         */
+        bits?: number;
+        /**
+         * The RSA exponent, as a string in hexadecimal number notation.
+         */
+        exponent?: string;
+        /**
+         * The RSA modulus, as a hexadecimal string.
+         */
+        modulus?: string;
+        /**
+         * The public key.
+         */
+        pubkey?: NonSharedBuffer;
+        /**
+         * The ASN.1 name of the OID of the elliptic curve.
+         * Well-known curves are identified by an OID.
+         * While it is unusual, it is possible that the curve
+         * is identified by its mathematical properties,
+         * in which case it will not have an OID.
+         */
+        asn1Curve?: string;
+        /**
+         * The NIST name for the elliptic curve, if it has one
+         * (not all well-known curves have been assigned names by NIST).
+         */
+        nistCurve?: string;
+    }
+    interface DetailedPeerCertificate extends PeerCertificate {
+        /**
+         * The issuer certificate object.
+         * For self-signed certificates, this may be a circular reference.
+         */
+        issuerCertificate: DetailedPeerCertificate;
+    }
+    interface CipherNameAndProtocol {
+        /**
+         * The cipher name.
+         */
+        name: string;
+        /**
+         * SSL/TLS protocol version.
+         */
+        version: string;
+        /**
+         * IETF name for the cipher suite.
+         */
+        standardName: string;
+    }
+    interface EphemeralKeyInfo {
+        /**
+         * The supported types are 'DH' and 'ECDH'.
+         */
+        type: string;
+        /**
+         * The name property is available only when type is 'ECDH'.
+         */
+        name?: string | undefined;
+        /**
+         * The size of parameter of an ephemeral key exchange.
+         */
+        size: number;
+    }
+    interface KeyObject {
+        /**
+         * Private keys in PEM format.
+         */
+        pem: string | Buffer;
+        /**
+         * Optional passphrase.
+         */
+        passphrase?: string | undefined;
+    }
+    interface PxfObject {
+        /**
+         * PFX or PKCS12 encoded private key and certificate chain.
+         */
+        buf: string | Buffer;
+        /**
+         * Optional passphrase.
+         */
+        passphrase?: string | undefined;
+    }
+    interface TLSSocketOptions extends SecureContextOptions, CommonConnectionOptions {
+        /**
+         * If true the TLS socket will be instantiated in server-mode.
+         * Defaults to false.
+         */
+        isServer?: boolean | undefined;
+        /**
+         * An optional net.Server instance.
+         */
+        server?: net.Server | undefined;
+        /**
+         * An optional Buffer instance containing a TLS session.
+         */
+        session?: Buffer | undefined;
+    }
+    interface TLSSocketEventMap extends net.SocketEventMap {
+        "keylog": [line: NonSharedBuffer];
+        "OCSPResponse": [response: NonSharedBuffer];
+        "secure": [];
+        "secureConnect": [];
+        "session": [session: NonSharedBuffer];
+    }
+    /**
+     * Performs transparent encryption of written data and all required TLS
+     * negotiation.
+     *
+     * Instances of `tls.TLSSocket` implement the duplex `Stream` interface.
+     *
+     * Methods that return TLS connection metadata (e.g.{@link TLSSocket.getPeerCertificate}) will only return data while the
+     * connection is open.
+     * @since v0.11.4
+     */
+    class TLSSocket extends net.Socket {
+        /**
+         * Construct a new tls.TLSSocket object from an existing TCP socket.
+         */
+        constructor(socket: net.Socket | stream.Duplex, options?: TLSSocketOptions);
+        /**
+         * This property is `true` if the peer certificate was signed by one of the CAs
+         * specified when creating the `tls.TLSSocket` instance, otherwise `false`.
+         * @since v0.11.4
+         */
+        authorized: boolean;
+        /**
+         * Returns the reason why the peer's certificate was not been verified. This
+         * property is set only when `tlsSocket.authorized === false`.
+         * @since v0.11.4
+         */
+        authorizationError: Error;
+        /**
+         * Always returns `true`. This may be used to distinguish TLS sockets from regular`net.Socket` instances.
+         * @since v0.11.4
+         */
+        encrypted: true;
+        /**
+         * String containing the selected ALPN protocol.
+         * Before a handshake has completed, this value is always null.
+         * When a handshake is completed but not ALPN protocol was selected, tlsSocket.alpnProtocol equals false.
+         */
+        alpnProtocol: string | false | null;
+        /**
+         * String containing the server name requested via SNI (Server Name Indication) TLS extension.
+         */
+        servername: string | false | null;
+        /**
+         * Returns an object representing the local certificate. The returned object has
+         * some properties corresponding to the fields of the certificate.
+         *
+         * See {@link TLSSocket.getPeerCertificate} for an example of the certificate
+         * structure.
+         *
+         * If there is no local certificate, an empty object will be returned. If the
+         * socket has been destroyed, `null` will be returned.
+         * @since v11.2.0
+         */
+        getCertificate(): PeerCertificate | object | null;
+        /**
+         * Returns an object containing information on the negotiated cipher suite.
+         *
+         * For example, a TLSv1.2 protocol with AES256-SHA cipher:
+         *
+         * ```json
+         * {
+         *     "name": "AES256-SHA",
+         *     "standardName": "TLS_RSA_WITH_AES_256_CBC_SHA",
+         *     "version": "SSLv3"
+         * }
+         * ```
+         *
+         * See [SSL\_CIPHER\_get\_name](https://www.openssl.org/docs/man1.1.1/man3/SSL_CIPHER_get_name.html) for more information.
+         * @since v0.11.4
+         */
+        getCipher(): CipherNameAndProtocol;
+        /**
+         * Returns an object representing the type, name, and size of parameter of
+         * an ephemeral key exchange in `perfect forward secrecy` on a client
+         * connection. It returns an empty object when the key exchange is not
+         * ephemeral. As this is only supported on a client socket; `null` is returned
+         * if called on a server socket. The supported types are `'DH'` and `'ECDH'`. The `name` property is available only when type is `'ECDH'`.
+         *
+         * For example: `{ type: 'ECDH', name: 'prime256v1', size: 256 }`.
+         * @since v5.0.0
+         */
+        getEphemeralKeyInfo(): EphemeralKeyInfo | object | null;
+        /**
+         * As the `Finished` messages are message digests of the complete handshake
+         * (with a total of 192 bits for TLS 1.0 and more for SSL 3.0), they can
+         * be used for external authentication procedures when the authentication
+         * provided by SSL/TLS is not desired or is not enough.
+         *
+         * Corresponds to the `SSL_get_finished` routine in OpenSSL and may be used
+         * to implement the `tls-unique` channel binding from [RFC 5929](https://tools.ietf.org/html/rfc5929).
+         * @since v9.9.0
+         * @return The latest `Finished` message that has been sent to the socket as part of a SSL/TLS handshake, or `undefined` if no `Finished` message has been sent yet.
+         */
+        getFinished(): NonSharedBuffer | undefined;
+        /**
+         * Returns an object representing the peer's certificate. If the peer does not
+         * provide a certificate, an empty object will be returned. If the socket has been
+         * destroyed, `null` will be returned.
+         *
+         * If the full certificate chain was requested, each certificate will include an`issuerCertificate` property containing an object representing its issuer's
+         * certificate.
+         * @since v0.11.4
+         * @param detailed Include the full certificate chain if `true`, otherwise include just the peer's certificate.
+         * @return A certificate object.
+         */
+        getPeerCertificate(detailed: true): DetailedPeerCertificate;
+        getPeerCertificate(detailed?: false): PeerCertificate;
+        getPeerCertificate(detailed?: boolean): PeerCertificate | DetailedPeerCertificate;
+        /**
+         * As the `Finished` messages are message digests of the complete handshake
+         * (with a total of 192 bits for TLS 1.0 and more for SSL 3.0), they can
+         * be used for external authentication procedures when the authentication
+         * provided by SSL/TLS is not desired or is not enough.
+         *
+         * Corresponds to the `SSL_get_peer_finished` routine in OpenSSL and may be used
+         * to implement the `tls-unique` channel binding from [RFC 5929](https://tools.ietf.org/html/rfc5929).
+         * @since v9.9.0
+         * @return The latest `Finished` message that is expected or has actually been received from the socket as part of a SSL/TLS handshake, or `undefined` if there is no `Finished` message so
+         * far.
+         */
+        getPeerFinished(): NonSharedBuffer | undefined;
+        /**
+         * Returns a string containing the negotiated SSL/TLS protocol version of the
+         * current connection. The value `'unknown'` will be returned for connected
+         * sockets that have not completed the handshaking process. The value `null` will
+         * be returned for server sockets or disconnected client sockets.
+         *
+         * Protocol versions are:
+         *
+         * * `'SSLv3'`
+         * * `'TLSv1'`
+         * * `'TLSv1.1'`
+         * * `'TLSv1.2'`
+         * * `'TLSv1.3'`
+         *
+         * See the OpenSSL [`SSL_get_version`](https://www.openssl.org/docs/man1.1.1/man3/SSL_get_version.html) documentation for more information.
+         * @since v5.7.0
+         */
+        getProtocol(): string | null;
+        /**
+         * Returns the TLS session data or `undefined` if no session was
+         * negotiated. On the client, the data can be provided to the `session` option of {@link connect} to resume the connection. On the server, it may be useful
+         * for debugging.
+         *
+         * See `Session Resumption` for more information.
+         *
+         * Note: `getSession()` works only for TLSv1.2 and below. For TLSv1.3, applications
+         * must use the `'session'` event (it also works for TLSv1.2 and below).
+         * @since v0.11.4
+         */
+        getSession(): NonSharedBuffer | undefined;
+        /**
+         * See [SSL\_get\_shared\_sigalgs](https://www.openssl.org/docs/man1.1.1/man3/SSL_get_shared_sigalgs.html) for more information.
+         * @since v12.11.0
+         * @return List of signature algorithms shared between the server and the client in the order of decreasing preference.
+         */
+        getSharedSigalgs(): string[];
+        /**
+         * For a client, returns the TLS session ticket if one is available, or`undefined`. For a server, always returns `undefined`.
+         *
+         * It may be useful for debugging.
+         *
+         * See `Session Resumption` for more information.
+         * @since v0.11.4
+         */
+        getTLSTicket(): NonSharedBuffer | undefined;
+        /**
+         * See `Session Resumption` for more information.
+         * @since v0.5.6
+         * @return `true` if the session was reused, `false` otherwise.
+         */
+        isSessionReused(): boolean;
+        /**
+         * The `tlsSocket.renegotiate()` method initiates a TLS renegotiation process.
+         * Upon completion, the `callback` function will be passed a single argument
+         * that is either an `Error` (if the request failed) or `null`.
+         *
+         * This method can be used to request a peer's certificate after the secure
+         * connection has been established.
+         *
+         * When running as the server, the socket will be destroyed with an error after `handshakeTimeout` timeout.
+         *
+         * For TLSv1.3, renegotiation cannot be initiated, it is not supported by the
+         * protocol.
+         * @since v0.11.8
+         * @param callback If `renegotiate()` returned `true`, callback is attached once to the `'secure'` event. If `renegotiate()` returned `false`, `callback` will be called in the next tick with
+         * an error, unless the `tlsSocket` has been destroyed, in which case `callback` will not be called at all.
+         * @return `true` if renegotiation was initiated, `false` otherwise.
+         */
+        renegotiate(
+            options: {
+                rejectUnauthorized?: boolean | undefined;
+                requestCert?: boolean | undefined;
+            },
+            callback: (err: Error | null) => void,
+        ): undefined | boolean;
+        /**
+         * The `tlsSocket.setKeyCert()` method sets the private key and certificate to use for the socket.
+         * This is mainly useful if you wish to select a server certificate from a TLS server's `ALPNCallback`.
+         * @since v22.5.0, v20.17.0
+         * @param context An object containing at least `key` and `cert` properties from the {@link createSecureContext()} `options`,
+         * or a TLS context object created with {@link createSecureContext()} itself.
+         */
+        setKeyCert(context: SecureContextOptions | SecureContext): void;
+        /**
+         * The `tlsSocket.setMaxSendFragment()` method sets the maximum TLS fragment size.
+         * Returns `true` if setting the limit succeeded; `false` otherwise.
+         *
+         * Smaller fragment sizes decrease the buffering latency on the client: larger
+         * fragments are buffered by the TLS layer until the entire fragment is received
+         * and its integrity is verified; large fragments can span multiple roundtrips
+         * and their processing can be delayed due to packet loss or reordering. However,
+         * smaller fragments add extra TLS framing bytes and CPU overhead, which may
+         * decrease overall server throughput.
+         * @since v0.11.11
+         * @param [size=16384] The maximum TLS fragment size. The maximum value is `16384`.
+         */
+        setMaxSendFragment(size: number): boolean;
+        /**
+         * Disables TLS renegotiation for this `TLSSocket` instance. Once called, attempts
+         * to renegotiate will trigger an `'error'` event on the `TLSSocket`.
+         * @since v8.4.0
+         */
+        disableRenegotiation(): void;
+        /**
+         * When enabled, TLS packet trace information is written to `stderr`. This can be
+         * used to debug TLS connection problems.
+         *
+         * The format of the output is identical to the output of`openssl s_client -trace` or `openssl s_server -trace`. While it is produced by
+         * OpenSSL's `SSL_trace()` function, the format is undocumented, can change
+         * without notice, and should not be relied on.
+         * @since v12.2.0
+         */
+        enableTrace(): void;
+        /**
+         * Returns the peer certificate as an `X509Certificate` object.
+         *
+         * If there is no peer certificate, or the socket has been destroyed,`undefined` will be returned.
+         * @since v15.9.0
+         */
+        getPeerX509Certificate(): X509Certificate | undefined;
+        /**
+         * Returns the local certificate as an `X509Certificate` object.
+         *
+         * If there is no local certificate, or the socket has been destroyed,`undefined` will be returned.
+         * @since v15.9.0
+         */
+        getX509Certificate(): X509Certificate | undefined;
+        /**
+         * Keying material is used for validations to prevent different kind of attacks in
+         * network protocols, for example in the specifications of IEEE 802.1X.
+         *
+         * Example
+         *
+         * ```js
+         * const keyingMaterial = tlsSocket.exportKeyingMaterial(
+         *   128,
+         *   'client finished');
+         *
+         * /*
+         *  Example return value of keyingMaterial:
+         *  <Buffer 76 26 af 99 c5 56 8e 42 09 91 ef 9f 93 cb ad 6c 7b 65 f8 53 f1 d8 d9
+         *     12 5a 33 b8 b5 25 df 7b 37 9f e0 e2 4f b8 67 83 a3 2f cd 5d 41 42 4c 91
+         *     74 ef 2c ... 78 more bytes>
+         *
+         * ```
+         *
+         * See the OpenSSL [`SSL_export_keying_material`](https://www.openssl.org/docs/man1.1.1/man3/SSL_export_keying_material.html) documentation for more
+         * information.
+         * @since v13.10.0, v12.17.0
+         * @param length number of bytes to retrieve from keying material
+         * @param label an application specific label, typically this will be a value from the [IANA Exporter Label
+         * Registry](https://www.iana.org/assignments/tls-parameters/tls-parameters.xhtml#exporter-labels).
+         * @param context Optionally provide a context.
+         * @return requested bytes of the keying material
+         */
+        exportKeyingMaterial(length: number, label: string, context: Buffer): NonSharedBuffer;
+        // #region InternalEventEmitter
+        addListener<E extends keyof TLSSocketEventMap>(
+            eventName: E,
+            listener: (...args: TLSSocketEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof TLSSocketEventMap>(eventName: E, ...args: TLSSocketEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof TLSSocketEventMap>(
+            eventName: E,
+            listener?: (...args: TLSSocketEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof TLSSocketEventMap>(eventName: E): ((...args: TLSSocketEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof TLSSocketEventMap>(eventName: E, listener: (...args: TLSSocketEventMap[E]) => void): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof TLSSocketEventMap>(eventName: E, listener: (...args: TLSSocketEventMap[E]) => void): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof TLSSocketEventMap>(eventName: E, listener: (...args: TLSSocketEventMap[E]) => void): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof TLSSocketEventMap>(
+            eventName: E,
+            listener: (...args: TLSSocketEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof TLSSocketEventMap>(
+            eventName: E,
+            listener: (...args: TLSSocketEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof TLSSocketEventMap>(eventName: E): ((...args: TLSSocketEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof TLSSocketEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof TLSSocketEventMap>(
+            eventName: E,
+            listener: (...args: TLSSocketEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    interface CommonConnectionOptions {
+        /**
+         * An optional TLS context object from tls.createSecureContext()
+         */
+        secureContext?: SecureContext | undefined;
+        /**
+         * When enabled, TLS packet trace information is written to `stderr`. This can be
+         * used to debug TLS connection problems.
+         * @default false
+         */
+        enableTrace?: boolean | undefined;
+        /**
+         * If true the server will request a certificate from clients that
+         * connect and attempt to verify that certificate. Defaults to
+         * false.
+         */
+        requestCert?: boolean | undefined;
+        /**
+         * An array of strings, or a single `Buffer`, `TypedArray`, or `DataView` containing the supported
+         * ALPN protocols. Buffers should have the format `[len][name][len][name]...`
+         * e.g. `'\x08http/1.1\x08http/1.0'`, where the `len` byte is the length of the
+         * next protocol name. Passing an array is usually much simpler, e.g.
+         * `['http/1.1', 'http/1.0']`. Protocols earlier in the list have higher
+         * preference than those later.
+         */
+        ALPNProtocols?: readonly string[] | NodeJS.ArrayBufferView | undefined;
+        /**
+         * SNICallback(servername, cb) <Function> A function that will be
+         * called if the client supports SNI TLS extension. Two arguments
+         * will be passed when called: servername and cb. SNICallback should
+         * invoke cb(null, ctx), where ctx is a SecureContext instance.
+         * (tls.createSecureContext(...) can be used to get a proper
+         * SecureContext.) If SNICallback wasn't provided the default callback
+         * with high-level API will be used (see below).
+         */
+        SNICallback?: ((servername: string, cb: (err: Error | null, ctx?: SecureContext) => void) => void) | undefined;
+        /**
+         * If true the server will reject any connection which is not
+         * authorized with the list of supplied CAs. This option only has an
+         * effect if requestCert is true.
+         * @default true
+         */
+        rejectUnauthorized?: boolean | undefined;
+        /**
+         * If true, specifies that the OCSP status request extension will be
+         * added to the client hello and an 'OCSPResponse' event will be
+         * emitted on the socket before establishing a secure communication.
+         */
+        requestOCSP?: boolean | undefined;
+    }
+    interface TlsOptions extends SecureContextOptions, CommonConnectionOptions, net.ServerOpts {
+        /**
+         * Abort the connection if the SSL/TLS handshake does not finish in the
+         * specified number of milliseconds. A 'tlsClientError' is emitted on
+         * the tls.Server object whenever a handshake times out. Default:
+         * 120000 (120 seconds).
+         */
+        handshakeTimeout?: number | undefined;
+        /**
+         * The number of seconds after which a TLS session created by the
+         * server will no longer be resumable. See Session Resumption for more
+         * information. Default: 300.
+         */
+        sessionTimeout?: number | undefined;
+        /**
+         * 48-bytes of cryptographically strong pseudo-random data.
+         */
+        ticketKeys?: Buffer | undefined;
+        /**
+         * @param socket
+         * @param identity identity parameter sent from the client.
+         * @return pre-shared key that must either be
+         * a buffer or `null` to stop the negotiation process. Returned PSK must be
+         * compatible with the selected cipher's digest.
+         *
+         * When negotiating TLS-PSK (pre-shared keys), this function is called
+         * with the identity provided by the client.
+         * If the return value is `null` the negotiation process will stop and an
+         * "unknown_psk_identity" alert message will be sent to the other party.
+         * If the server wishes to hide the fact that the PSK identity was not known,
+         * the callback must provide some random data as `psk` to make the connection
+         * fail with "decrypt_error" before negotiation is finished.
+         * PSK ciphers are disabled by default, and using TLS-PSK thus
+         * requires explicitly specifying a cipher suite with the `ciphers` option.
+         * More information can be found in the RFC 4279.
+         */
+        pskCallback?: ((socket: TLSSocket, identity: string) => NodeJS.ArrayBufferView | null) | undefined;
+        /**
+         * hint to send to a client to help
+         * with selecting the identity during TLS-PSK negotiation. Will be ignored
+         * in TLS 1.3. Upon failing to set pskIdentityHint `tlsClientError` will be
+         * emitted with `ERR_TLS_PSK_SET_IDENTIY_HINT_FAILED` code.
+         */
+        pskIdentityHint?: string | undefined;
+    }
+    interface PSKCallbackNegotation {
+        psk: NodeJS.ArrayBufferView;
+        identity: string;
+    }
+    interface ConnectionOptions extends SecureContextOptions, CommonConnectionOptions {
+        host?: string | undefined;
+        port?: number | undefined;
+        path?: string | undefined; // Creates unix socket connection to path. If this option is specified, `host` and `port` are ignored.
+        socket?: stream.Duplex | undefined; // Establish secure connection on a given socket rather than creating a new socket
+        checkServerIdentity?: typeof checkServerIdentity | undefined;
+        servername?: string | undefined; // SNI TLS Extension
+        session?: Buffer | undefined;
+        minDHSize?: number | undefined;
+        lookup?: net.LookupFunction | undefined;
+        timeout?: number | undefined;
+        /**
+         * When negotiating TLS-PSK (pre-shared keys), this function is called
+         * with optional identity `hint` provided by the server or `null`
+         * in case of TLS 1.3 where `hint` was removed.
+         * It will be necessary to provide a custom `tls.checkServerIdentity()`
+         * for the connection as the default one will try to check hostname/IP
+         * of the server against the certificate but that's not applicable for PSK
+         * because there won't be a certificate present.
+         * More information can be found in the RFC 4279.
+         *
+         * @param hint message sent from the server to help client
+         * decide which identity to use during negotiation.
+         * Always `null` if TLS 1.3 is used.
+         * @returns Return `null` to stop the negotiation process. `psk` must be
+         * compatible with the selected cipher's digest.
+         * `identity` must use UTF-8 encoding.
+         */
+        pskCallback?: ((hint: string | null) => PSKCallbackNegotation | null) | undefined;
+    }
+    interface ServerEventMap extends net.ServerEventMap {
+        "connection": [socket: net.Socket];
+        "keylog": [line: NonSharedBuffer, tlsSocket: TLSSocket];
+        "newSession": [sessionId: NonSharedBuffer, sessionData: NonSharedBuffer, callback: () => void];
+        "OCSPRequest": [
+            certificate: NonSharedBuffer,
+            issuer: NonSharedBuffer,
+            callback: (err: Error | null, resp: Buffer | null) => void,
+        ];
+        "resumeSession": [sessionId: Buffer, callback: (err: Error | null, sessionData?: Buffer) => void];
+        "secureConnection": [tlsSocket: TLSSocket];
+        "tlsClientError": [exception: Error, tlsSocket: TLSSocket];
+    }
+    /**
+     * Accepts encrypted connections using TLS or SSL.
+     * @since v0.3.2
+     */
+    class Server extends net.Server {
+        constructor(secureConnectionListener?: (socket: TLSSocket) => void);
+        constructor(options: TlsOptions, secureConnectionListener?: (socket: TLSSocket) => void);
+        /**
+         * The `server.addContext()` method adds a secure context that will be used if
+         * the client request's SNI name matches the supplied `hostname` (or wildcard).
+         *
+         * When there are multiple matching contexts, the most recently added one is
+         * used.
+         * @since v0.5.3
+         * @param hostname A SNI host name or wildcard (e.g. `'*'`)
+         * @param context An object containing any of the possible properties from the {@link createSecureContext} `options` arguments (e.g. `key`, `cert`, `ca`, etc), or a TLS context object created
+         * with {@link createSecureContext} itself.
+         */
+        addContext(hostname: string, context: SecureContextOptions | SecureContext): void;
+        /**
+         * Returns the session ticket keys.
+         *
+         * See `Session Resumption` for more information.
+         * @since v3.0.0
+         * @return A 48-byte buffer containing the session ticket keys.
+         */
+        getTicketKeys(): NonSharedBuffer;
+        /**
+         * The `server.setSecureContext()` method replaces the secure context of an
+         * existing server. Existing connections to the server are not interrupted.
+         * @since v11.0.0
+         * @param options An object containing any of the possible properties from the {@link createSecureContext} `options` arguments (e.g. `key`, `cert`, `ca`, etc).
+         */
+        setSecureContext(options: SecureContextOptions): void;
+        /**
+         * Sets the session ticket keys.
+         *
+         * Changes to the ticket keys are effective only for future server connections.
+         * Existing or currently pending server connections will use the previous keys.
+         *
+         * See `Session Resumption` for more information.
+         * @since v3.0.0
+         * @param keys A 48-byte buffer containing the session ticket keys.
+         */
+        setTicketKeys(keys: Buffer): void;
+        // #region InternalEventEmitter
+        addListener<E extends keyof ServerEventMap>(eventName: E, listener: (...args: ServerEventMap[E]) => void): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof ServerEventMap>(eventName: E, ...args: ServerEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener?: (...args: ServerEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof ServerEventMap>(eventName: E): ((...args: ServerEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof ServerEventMap>(eventName: E, listener: (...args: ServerEventMap[E]) => void): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof ServerEventMap>(eventName: E, listener: (...args: ServerEventMap[E]) => void): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof ServerEventMap>(eventName: E, listener: (...args: ServerEventMap[E]) => void): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof ServerEventMap>(eventName: E): ((...args: ServerEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof ServerEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof ServerEventMap>(
+            eventName: E,
+            listener: (...args: ServerEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+    type SecureVersion = "TLSv1.3" | "TLSv1.2" | "TLSv1.1" | "TLSv1";
+    interface SecureContextOptions {
+        /**
+         * If set, this will be called when a client opens a connection using the ALPN extension.
+         * One argument will be passed to the callback: an object containing `servername` and `protocols` fields,
+         * respectively containing the server name from the SNI extension (if any) and an array of
+         * ALPN protocol name strings. The callback must return either one of the strings listed in `protocols`,
+         * which will be returned to the client as the selected ALPN protocol, or `undefined`,
+         * to reject the connection with a fatal alert. If a string is returned that does not match one of
+         * the client's ALPN protocols, an error will be thrown.
+         * This option cannot be used with the `ALPNProtocols` option, and setting both options will throw an error.
+         */
+        ALPNCallback?: ((arg: { servername: string; protocols: string[] }) => string | undefined) | undefined;
+        /**
+         * Treat intermediate (non-self-signed)
+         * certificates in the trust CA certificate list as trusted.
+         * @since v22.9.0, v20.18.0
+         */
+        allowPartialTrustChain?: boolean | undefined;
+        /**
+         * Optionally override the trusted CA certificates. Default is to trust
+         * the well-known CAs curated by Mozilla. Mozilla's CAs are completely
+         * replaced when CAs are explicitly specified using this option.
+         */
+        ca?: string | Buffer | Array<string | Buffer> | undefined;
+        /**
+         *  Cert chains in PEM format. One cert chain should be provided per
+         *  private key. Each cert chain should consist of the PEM formatted
+         *  certificate for a provided private key, followed by the PEM
+         *  formatted intermediate certificates (if any), in order, and not
+         *  including the root CA (the root CA must be pre-known to the peer,
+         *  see ca). When providing multiple cert chains, they do not have to
+         *  be in the same order as their private keys in key. If the
+         *  intermediate certificates are not provided, the peer will not be
+         *  able to validate the certificate, and the handshake will fail.
+         */
+        cert?: string | Buffer | Array<string | Buffer> | undefined;
+        /**
+         *  Colon-separated list of supported signature algorithms. The list
+         *  can contain digest algorithms (SHA256, MD5 etc.), public key
+         *  algorithms (RSA-PSS, ECDSA etc.), combination of both (e.g
+         *  'RSA+SHA384') or TLS v1.3 scheme names (e.g. rsa_pss_pss_sha512).
+         */
+        sigalgs?: string | undefined;
+        /**
+         * Cipher suite specification, replacing the default. For more
+         * information, see modifying the default cipher suite. Permitted
+         * ciphers can be obtained via tls.getCiphers(). Cipher names must be
+         * uppercased in order for OpenSSL to accept them.
+         */
+        ciphers?: string | undefined;
+        /**
+         * Name of an OpenSSL engine which can provide the client certificate.
+         * @deprecated
+         */
+        clientCertEngine?: string | undefined;
+        /**
+         * PEM formatted CRLs (Certificate Revocation Lists).
+         */
+        crl?: string | Buffer | Array<string | Buffer> | undefined;
+        /**
+         * `'auto'` or custom Diffie-Hellman parameters, required for non-ECDHE perfect forward secrecy.
+         * If omitted or invalid, the parameters are silently discarded and DHE ciphers will not be available.
+         * ECDHE-based perfect forward secrecy will still be available.
+         */
+        dhparam?: string | Buffer | undefined;
+        /**
+         * A string describing a named curve or a colon separated list of curve
+         * NIDs or names, for example P-521:P-384:P-256, to use for ECDH key
+         * agreement. Set to auto to select the curve automatically. Use
+         * crypto.getCurves() to obtain a list of available curve names. On
+         * recent releases, openssl ecparam -list_curves will also display the
+         * name and description of each available elliptic curve. Default:
+         * tls.DEFAULT_ECDH_CURVE.
+         */
+        ecdhCurve?: string | undefined;
+        /**
+         * Attempt to use the server's cipher suite preferences instead of the
+         * client's. When true, causes SSL_OP_CIPHER_SERVER_PREFERENCE to be
+         * set in secureOptions
+         */
+        honorCipherOrder?: boolean | undefined;
+        /**
+         * Private keys in PEM format. PEM allows the option of private keys
+         * being encrypted. Encrypted keys will be decrypted with
+         * options.passphrase. Multiple keys using different algorithms can be
+         * provided either as an array of unencrypted key strings or buffers,
+         * or an array of objects in the form {pem: <string|buffer>[,
+         * passphrase: <string>]}. The object form can only occur in an array.
+         * object.passphrase is optional. Encrypted keys will be decrypted with
+         * object.passphrase if provided, or options.passphrase if it is not.
+         */
+        key?: string | Buffer | Array<string | Buffer | KeyObject> | undefined;
+        /**
+         * Name of an OpenSSL engine to get private key from. Should be used
+         * together with privateKeyIdentifier.
+         * @deprecated
+         */
+        privateKeyEngine?: string | undefined;
+        /**
+         * Identifier of a private key managed by an OpenSSL engine. Should be
+         * used together with privateKeyEngine. Should not be set together with
+         * key, because both options define a private key in different ways.
+         * @deprecated
+         */
+        privateKeyIdentifier?: string | undefined;
+        /**
+         * Optionally set the maximum TLS version to allow. One
+         * of `'TLSv1.3'`, `'TLSv1.2'`, `'TLSv1.1'`, or `'TLSv1'`. Cannot be specified along with the
+         * `secureProtocol` option, use one or the other.
+         * **Default:** `'TLSv1.3'`, unless changed using CLI options. Using
+         * `--tls-max-v1.2` sets the default to `'TLSv1.2'`. Using `--tls-max-v1.3` sets the default to
+         * `'TLSv1.3'`. If multiple of the options are provided, the highest maximum is used.
+         */
+        maxVersion?: SecureVersion | undefined;
+        /**
+         * Optionally set the minimum TLS version to allow. One
+         * of `'TLSv1.3'`, `'TLSv1.2'`, `'TLSv1.1'`, or `'TLSv1'`. Cannot be specified along with the
+         * `secureProtocol` option, use one or the other.  It is not recommended to use
+         * less than TLSv1.2, but it may be required for interoperability.
+         * **Default:** `'TLSv1.2'`, unless changed using CLI options. Using
+         * `--tls-v1.0` sets the default to `'TLSv1'`. Using `--tls-v1.1` sets the default to
+         * `'TLSv1.1'`. Using `--tls-min-v1.3` sets the default to
+         * 'TLSv1.3'. If multiple of the options are provided, the lowest minimum is used.
+         */
+        minVersion?: SecureVersion | undefined;
+        /**
+         * Shared passphrase used for a single private key and/or a PFX.
+         */
+        passphrase?: string | undefined;
+        /**
+         * PFX or PKCS12 encoded private key and certificate chain. pfx is an
+         * alternative to providing key and cert individually. PFX is usually
+         * encrypted, if it is, passphrase will be used to decrypt it. Multiple
+         * PFX can be provided either as an array of unencrypted PFX buffers,
+         * or an array of objects in the form {buf: <string|buffer>[,
+         * passphrase: <string>]}. The object form can only occur in an array.
+         * object.passphrase is optional. Encrypted PFX will be decrypted with
+         * object.passphrase if provided, or options.passphrase if it is not.
+         */
+        pfx?: string | Buffer | Array<string | Buffer | PxfObject> | undefined;
+        /**
+         * Optionally affect the OpenSSL protocol behavior, which is not
+         * usually necessary. This should be used carefully if at all! Value is
+         * a numeric bitmask of the SSL_OP_* options from OpenSSL Options
+         */
+        secureOptions?: number | undefined; // Value is a numeric bitmask of the `SSL_OP_*` options
+        /**
+         * Legacy mechanism to select the TLS protocol version to use, it does
+         * not support independent control of the minimum and maximum version,
+         * and does not support limiting the protocol to TLSv1.3. Use
+         * minVersion and maxVersion instead. The possible values are listed as
+         * SSL_METHODS, use the function names as strings. For example, use
+         * 'TLSv1_1_method' to force TLS version 1.1, or 'TLS_method' to allow
+         * any TLS protocol version up to TLSv1.3. It is not recommended to use
+         * TLS versions less than 1.2, but it may be required for
+         * interoperability. Default: none, see minVersion.
+         */
+        secureProtocol?: string | undefined;
+        /**
+         * Opaque identifier used by servers to ensure session state is not
+         * shared between applications. Unused by clients.
+         */
+        sessionIdContext?: string | undefined;
+        /**
+         * 48-bytes of cryptographically strong pseudo-random data.
+         * See Session Resumption for more information.
+         */
+        ticketKeys?: Buffer | undefined;
+        /**
+         * The number of seconds after which a TLS session created by the
+         * server will no longer be resumable. See Session Resumption for more
+         * information. Default: 300.
+         */
+        sessionTimeout?: number | undefined;
+    }
+    interface SecureContext {
+        context: any;
+    }
+    /**
+     * Verifies the certificate `cert` is issued to `hostname`.
+     *
+     * Returns [Error](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Error) object, populating it with `reason`, `host`, and `cert` on
+     * failure. On success, returns [undefined](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#Undefined_type).
+     *
+     * This function is intended to be used in combination with the`checkServerIdentity` option that can be passed to {@link connect} and as
+     * such operates on a `certificate object`. For other purposes, consider using `x509.checkHost()` instead.
+     *
+     * This function can be overwritten by providing an alternative function as the `options.checkServerIdentity` option that is passed to `tls.connect()`. The
+     * overwriting function can call `tls.checkServerIdentity()` of course, to augment
+     * the checks done with additional verification.
+     *
+     * This function is only called if the certificate passed all other checks, such as
+     * being issued by trusted CA (`options.ca`).
+     *
+     * Earlier versions of Node.js incorrectly accepted certificates for a given`hostname` if a matching `uniformResourceIdentifier` subject alternative name
+     * was present (see [CVE-2021-44531](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44531)). Applications that wish to accept`uniformResourceIdentifier` subject alternative names can use
+     * a custom `options.checkServerIdentity` function that implements the desired behavior.
+     * @since v0.8.4
+     * @param hostname The host name or IP address to verify the certificate against.
+     * @param cert A `certificate object` representing the peer's certificate.
+     */
+    function checkServerIdentity(hostname: string, cert: PeerCertificate): Error | undefined;
+    /**
+     * Creates a new {@link Server}. The `secureConnectionListener`, if provided, is
+     * automatically set as a listener for the `'secureConnection'` event.
+     *
+     * The `ticketKeys` options is automatically shared between `node:cluster` module
+     * workers.
+     *
+     * The following illustrates a simple echo server:
+     *
+     * ```js
+     * import tls from 'node:tls';
+     * import fs from 'node:fs';
+     *
+     * const options = {
+     *   key: fs.readFileSync('server-key.pem'),
+     *   cert: fs.readFileSync('server-cert.pem'),
+     *
+     *   // This is necessary only if using client certificate authentication.
+     *   requestCert: true,
+     *
+     *   // This is necessary only if the client uses a self-signed certificate.
+     *   ca: [ fs.readFileSync('client-cert.pem') ],
+     * };
+     *
+     * const server = tls.createServer(options, (socket) => {
+     *   console.log('server connected',
+     *               socket.authorized ? 'authorized' : 'unauthorized');
+     *   socket.write('welcome!\n');
+     *   socket.setEncoding('utf8');
+     *   socket.pipe(socket);
+     * });
+     * server.listen(8000, () => {
+     *   console.log('server bound');
+     * });
+     * ```
+     *
+     * The server can be tested by connecting to it using the example client from {@link connect}.
+     * @since v0.3.2
+     */
+    function createServer(secureConnectionListener?: (socket: TLSSocket) => void): Server;
+    function createServer(options: TlsOptions, secureConnectionListener?: (socket: TLSSocket) => void): Server;
+    /**
+     * The `callback` function, if specified, will be added as a listener for the `'secureConnect'` event.
+     *
+     * `tls.connect()` returns a {@link TLSSocket} object.
+     *
+     * Unlike the `https` API, `tls.connect()` does not enable the
+     * SNI (Server Name Indication) extension by default, which may cause some
+     * servers to return an incorrect certificate or reject the connection
+     * altogether. To enable SNI, set the `servername` option in addition
+     * to `host`.
+     *
+     * The following illustrates a client for the echo server example from {@link createServer}:
+     *
+     * ```js
+     * // Assumes an echo server that is listening on port 8000.
+     * import tls from 'node:tls';
+     * import fs from 'node:fs';
+     *
+     * const options = {
+     *   // Necessary only if the server requires client certificate authentication.
+     *   key: fs.readFileSync('client-key.pem'),
+     *   cert: fs.readFileSync('client-cert.pem'),
+     *
+     *   // Necessary only if the server uses a self-signed certificate.
+     *   ca: [ fs.readFileSync('server-cert.pem') ],
+     *
+     *   // Necessary only if the server's cert isn't for "localhost".
+     *   checkServerIdentity: () => { return null; },
+     * };
+     *
+     * const socket = tls.connect(8000, options, () => {
+     *   console.log('client connected',
+     *               socket.authorized ? 'authorized' : 'unauthorized');
+     *   process.stdin.pipe(socket);
+     *   process.stdin.resume();
+     * });
+     * socket.setEncoding('utf8');
+     * socket.on('data', (data) => {
+     *   console.log(data);
+     * });
+     * socket.on('end', () => {
+     *   console.log('server ends connection');
+     * });
+     * ```
+     * @since v0.11.3
+     */
+    function connect(options: ConnectionOptions, secureConnectListener?: () => void): TLSSocket;
+    function connect(
+        port: number,
+        host?: string,
+        options?: ConnectionOptions,
+        secureConnectListener?: () => void,
+    ): TLSSocket;
+    function connect(port: number, options?: ConnectionOptions, secureConnectListener?: () => void): TLSSocket;
+    /**
+     * `{@link createServer}` sets the default value of the `honorCipherOrder` option
+     * to `true`, other APIs that create secure contexts leave it unset.
+     *
+     * `{@link createServer}` uses a 128 bit truncated SHA1 hash value generated
+     * from `process.argv` as the default value of the `sessionIdContext` option, other
+     * APIs that create secure contexts have no default value.
+     *
+     * The `tls.createSecureContext()` method creates a `SecureContext` object. It is
+     * usable as an argument to several `tls` APIs, such as `server.addContext()`,
+     * but has no public methods. The {@link Server} constructor and the {@link createServer} method do not support the `secureContext` option.
+     *
+     * A key is _required_ for ciphers that use certificates. Either `key` or `pfx` can be used to provide it.
+     *
+     * If the `ca` option is not given, then Node.js will default to using [Mozilla's publicly trusted list of
+     * CAs](https://hg.mozilla.org/mozilla-central/raw-file/tip/security/nss/lib/ckfw/builtins/certdata.txt).
+     *
+     * Custom DHE parameters are discouraged in favor of the new `dhparam: 'auto' `option. When set to `'auto'`, well-known DHE parameters of sufficient strength
+     * will be selected automatically. Otherwise, if necessary, `openssl dhparam` can
+     * be used to create custom parameters. The key length must be greater than or
+     * equal to 1024 bits or else an error will be thrown. Although 1024 bits is
+     * permissible, use 2048 bits or larger for stronger security.
+     * @since v0.11.13
+     */
+    function createSecureContext(options?: SecureContextOptions): SecureContext;
+    /**
+     * Returns an array containing the CA certificates from various sources, depending on `type`:
+     *
+     * * `"default"`: return the CA certificates that will be used by the Node.js TLS clients by default.
+     *   * When `--use-bundled-ca` is enabled (default), or `--use-openssl-ca` is not enabled,
+     *     this would include CA certificates from the bundled Mozilla CA store.
+     *   * When `--use-system-ca` is enabled, this would also include certificates from the system's
+     *     trusted store.
+     *   * When `NODE_EXTRA_CA_CERTS` is used, this would also include certificates loaded from the specified
+     *     file.
+     * * `"system"`: return the CA certificates that are loaded from the system's trusted store, according
+     *   to rules set by `--use-system-ca`. This can be used to get the certificates from the system
+     *   when `--use-system-ca` is not enabled.
+     * * `"bundled"`: return the CA certificates from the bundled Mozilla CA store. This would be the same
+     *   as `tls.rootCertificates`.
+     * * `"extra"`: return the CA certificates loaded from `NODE_EXTRA_CA_CERTS`. It's an empty array if
+     *   `NODE_EXTRA_CA_CERTS` is not set.
+     * @since v22.15.0
+     * @param type The type of CA certificates that will be returned. Valid values
+     * are `"default"`, `"system"`, `"bundled"` and `"extra"`.
+     * **Default:** `"default"`.
+     * @returns An array of PEM-encoded certificates. The array may contain duplicates
+     * if the same certificate is repeatedly stored in multiple sources.
+     */
+    function getCACertificates(type?: "default" | "system" | "bundled" | "extra"): string[];
+    /**
+     * Returns an array with the names of the supported TLS ciphers. The names are
+     * lower-case for historical reasons, but must be uppercased to be used in
+     * the `ciphers` option of `{@link createSecureContext}`.
+     *
+     * Not all supported ciphers are enabled by default. See
+     * [Modifying the default TLS cipher suite](https://nodejs.org/docs/latest-v25.x/api/tls.html#modifying-the-default-tls-cipher-suite).
+     *
+     * Cipher names that start with `'tls_'` are for TLSv1.3, all the others are for
+     * TLSv1.2 and below.
+     *
+     * ```js
+     * console.log(tls.getCiphers()); // ['aes128-gcm-sha256', 'aes128-sha', ...]
+     * ```
+     * @since v0.10.2
+     */
+    function getCiphers(): string[];
+    /**
+     * Sets the default CA certificates used by Node.js TLS clients. If the provided
+     * certificates are parsed successfully, they will become the default CA
+     * certificate list returned by {@link getCACertificates} and used
+     * by subsequent TLS connections that don't specify their own CA certificates.
+     * The certificates will be deduplicated before being set as the default.
+     *
+     * This function only affects the current Node.js thread. Previous
+     * sessions cached by the HTTPS agent won't be affected by this change, so
+     * this method should be called before any unwanted cachable TLS connections are
+     * made.
+     *
+     * To use system CA certificates as the default:
+     *
+     * ```js
+     * import tls from 'node:tls';
+     * tls.setDefaultCACertificates(tls.getCACertificates('system'));
+     * ```
+     *
+     * This function completely replaces the default CA certificate list. To add additional
+     * certificates to the existing defaults, get the current certificates and append to them:
+     *
+     * ```js
+     * import tls from 'node:tls';
+     * const currentCerts = tls.getCACertificates('default');
+     * const additionalCerts = ['-----BEGIN CERTIFICATE-----\n...'];
+     * tls.setDefaultCACertificates([...currentCerts, ...additionalCerts]);
+     * ```
+     * @since v24.5.0
+     * @param certs An array of CA certificates in PEM format.
+     */
+    function setDefaultCACertificates(certs: ReadonlyArray<string | NodeJS.ArrayBufferView>): void;
+    /**
+     * The default curve name to use for ECDH key agreement in a tls server.
+     * The default value is `'auto'`. See `{@link createSecureContext()}` for further
+     * information.
+     * @since v0.11.13
+     */
+    let DEFAULT_ECDH_CURVE: string;
+    /**
+     * The default value of the `maxVersion` option of `{@link createSecureContext()}`.
+     * It can be assigned any of the supported TLS protocol versions,
+     * `'TLSv1.3'`, `'TLSv1.2'`, `'TLSv1.1'`, or `'TLSv1'`. **Default:** `'TLSv1.3'`, unless
+     * changed using CLI options. Using `--tls-max-v1.2` sets the default to `'TLSv1.2'`. Using
+     * `--tls-max-v1.3` sets the default to `'TLSv1.3'`. If multiple of the options
+     * are provided, the highest maximum is used.
+     * @since v11.4.0
+     */
+    let DEFAULT_MAX_VERSION: SecureVersion;
+    /**
+     * The default value of the `minVersion` option of `{@link createSecureContext()}`.
+     * It can be assigned any of the supported TLS protocol versions,
+     * `'TLSv1.3'`, `'TLSv1.2'`, `'TLSv1.1'`, or `'TLSv1'`. **Default:** `'TLSv1.2'`, unless
+     * changed using CLI options. Using `--tls-min-v1.0` sets the default to
+     * `'TLSv1'`. Using `--tls-min-v1.1` sets the default to `'TLSv1.1'`. Using
+     * `--tls-min-v1.3` sets the default to `'TLSv1.3'`. If multiple of the options
+     * are provided, the lowest minimum is used.
+     * @since v11.4.0
+     */
+    let DEFAULT_MIN_VERSION: SecureVersion;
+    /**
+     * The default value of the `ciphers` option of `{@link createSecureContext()}`.
+     * It can be assigned any of the supported OpenSSL ciphers.
+     * Defaults to the content of `crypto.constants.defaultCoreCipherList`, unless
+     * changed using CLI options using `--tls-default-ciphers`.
+     * @since v19.8.0
+     */
+    let DEFAULT_CIPHERS: string;
+    /**
+     * An immutable array of strings representing the root certificates (in PEM format)
+     * from the bundled Mozilla CA store as supplied by the current Node.js version.
+     *
+     * The bundled CA store, as supplied by Node.js, is a snapshot of Mozilla CA store
+     * that is fixed at release time. It is identical on all supported platforms.
+     * @since v12.3.0
+     */
+    const rootCertificates: readonly string[];
+}
+declare module "tls" {
+    export * from "node:tls";
+}
diff --git a/mqtt-backend/node_modules/@types/node/trace_events.d.ts b/mqtt-backend/node_modules/@types/node/trace_events.d.ts
new file mode 100644
index 0000000..5fa7a39
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/trace_events.d.ts
@@ -0,0 +1,103 @@
+declare module "node:trace_events" {
+    /**
+     * The `Tracing` object is used to enable or disable tracing for sets of
+     * categories. Instances are created using the
+     * `trace_events.createTracing()` method.
+     *
+     * When created, the `Tracing` object is disabled. Calling the
+     * `tracing.enable()` method adds the categories to the set of enabled trace
+     * event categories. Calling `tracing.disable()` will remove the categories
+     * from the set of enabled trace event categories.
+     */
+    interface Tracing {
+        /**
+         * A comma-separated list of the trace event categories covered by this
+         * `Tracing` object.
+         * @since v10.0.0
+         */
+        readonly categories: string;
+        /**
+         * Disables this `Tracing` object.
+         *
+         * Only trace event categories _not_ covered by other enabled `Tracing`
+         * objects and _not_ specified by the `--trace-event-categories` flag
+         * will be disabled.
+         *
+         * ```js
+         * import trace_events from 'node:trace_events';
+         * const t1 = trace_events.createTracing({ categories: ['node', 'v8'] });
+         * const t2 = trace_events.createTracing({ categories: ['node.perf', 'node'] });
+         * t1.enable();
+         * t2.enable();
+         *
+         * // Prints 'node,node.perf,v8'
+         * console.log(trace_events.getEnabledCategories());
+         *
+         * t2.disable(); // Will only disable emission of the 'node.perf' category
+         *
+         * // Prints 'node,v8'
+         * console.log(trace_events.getEnabledCategories());
+         * ```
+         * @since v10.0.0
+         */
+        disable(): void;
+        /**
+         * Enables this `Tracing` object for the set of categories covered by
+         * the `Tracing` object.
+         * @since v10.0.0
+         */
+        enable(): void;
+        /**
+         * `true` only if the `Tracing` object has been enabled.
+         * @since v10.0.0
+         */
+        readonly enabled: boolean;
+    }
+    interface CreateTracingOptions {
+        /**
+         * An array of trace category names. Values included in the array are
+         * coerced to a string when possible. An error will be thrown if the
+         * value cannot be coerced.
+         */
+        categories: string[];
+    }
+    /**
+     * Creates and returns a `Tracing` object for the given set of `categories`.
+     *
+     * ```js
+     * import trace_events from 'node:trace_events';
+     * const categories = ['node.perf', 'node.async_hooks'];
+     * const tracing = trace_events.createTracing({ categories });
+     * tracing.enable();
+     * // do stuff
+     * tracing.disable();
+     * ```
+     * @since v10.0.0
+     */
+    function createTracing(options: CreateTracingOptions): Tracing;
+    /**
+     * Returns a comma-separated list of all currently-enabled trace event
+     * categories. The current set of enabled trace event categories is determined
+     * by the _union_ of all currently-enabled `Tracing` objects and any categories
+     * enabled using the `--trace-event-categories` flag.
+     *
+     * Given the file `test.js` below, the command `node --trace-event-categories node.perf test.js` will print `'node.async_hooks,node.perf'` to the console.
+     *
+     * ```js
+     * import trace_events from 'node:trace_events';
+     * const t1 = trace_events.createTracing({ categories: ['node.async_hooks'] });
+     * const t2 = trace_events.createTracing({ categories: ['node.perf'] });
+     * const t3 = trace_events.createTracing({ categories: ['v8'] });
+     *
+     * t1.enable();
+     * t2.enable();
+     *
+     * console.log(trace_events.getEnabledCategories());
+     * ```
+     * @since v10.0.0
+     */
+    function getEnabledCategories(): string | undefined;
+}
+declare module "trace_events" {
+    export * from "node:trace_events";
+}
diff --git a/mqtt-backend/node_modules/@types/node/ts5.6/buffer.buffer.d.ts b/mqtt-backend/node_modules/@types/node/ts5.6/buffer.buffer.d.ts
new file mode 100644
index 0000000..118041b
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/ts5.6/buffer.buffer.d.ts
@@ -0,0 +1,462 @@
+declare module "node:buffer" {
+    global {
+        interface BufferConstructor {
+            // see ../buffer.d.ts for implementation shared with all TypeScript versions
+
+            /**
+             * Allocates a new buffer containing the given {str}.
+             *
+             * @param str String to store in buffer.
+             * @param encoding encoding to use, optional.  Default is 'utf8'
+             * @deprecated since v10.0.0 - Use `Buffer.from(string[, encoding])` instead.
+             */
+            new(str: string, encoding?: BufferEncoding): Buffer;
+            /**
+             * Allocates a new buffer of {size} octets.
+             *
+             * @param size count of octets to allocate.
+             * @deprecated since v10.0.0 - Use `Buffer.alloc()` instead (also see `Buffer.allocUnsafe()`).
+             */
+            new(size: number): Buffer;
+            /**
+             * Allocates a new buffer containing the given {array} of octets.
+             *
+             * @param array The octets to store.
+             * @deprecated since v10.0.0 - Use `Buffer.from(array)` instead.
+             */
+            new(array: ArrayLike<number>): Buffer;
+            /**
+             * Produces a Buffer backed by the same allocated memory as
+             * the given {ArrayBuffer}/{SharedArrayBuffer}.
+             *
+             * @param arrayBuffer The ArrayBuffer with which to share memory.
+             * @deprecated since v10.0.0 - Use `Buffer.from(arrayBuffer[, byteOffset[, length]])` instead.
+             */
+            new(arrayBuffer: ArrayBufferLike): Buffer;
+            /**
+             * Allocates a new `Buffer` using an `array` of bytes in the range `0` – `255`.
+             * Array entries outside that range will be truncated to fit into it.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Creates a new Buffer containing the UTF-8 bytes of the string 'buffer'.
+             * const buf = Buffer.from([0x62, 0x75, 0x66, 0x66, 0x65, 0x72]);
+             * ```
+             *
+             * If `array` is an `Array`-like object (that is, one with a `length` property of
+             * type `number`), it is treated as if it is an array, unless it is a `Buffer` or
+             * a `Uint8Array`. This means all other `TypedArray` variants get treated as an
+             * `Array`. To create a `Buffer` from the bytes backing a `TypedArray`, use
+             * `Buffer.copyBytesFrom()`.
+             *
+             * A `TypeError` will be thrown if `array` is not an `Array` or another type
+             * appropriate for `Buffer.from()` variants.
+             *
+             * `Buffer.from(array)` and `Buffer.from(string)` may also use the internal
+             * `Buffer` pool like `Buffer.allocUnsafe()` does.
+             * @since v5.10.0
+             */
+            from(array: WithImplicitCoercion<ArrayLike<number>>): Buffer;
+            /**
+             * This creates a view of the `ArrayBuffer` without copying the underlying
+             * memory. For example, when passed a reference to the `.buffer` property of a
+             * `TypedArray` instance, the newly created `Buffer` will share the same
+             * allocated memory as the `TypedArray`'s underlying `ArrayBuffer`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const arr = new Uint16Array(2);
+             *
+             * arr[0] = 5000;
+             * arr[1] = 4000;
+             *
+             * // Shares memory with `arr`.
+             * const buf = Buffer.from(arr.buffer);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 88 13 a0 0f>
+             *
+             * // Changing the original Uint16Array changes the Buffer also.
+             * arr[1] = 6000;
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 88 13 70 17>
+             * ```
+             *
+             * The optional `byteOffset` and `length` arguments specify a memory range within
+             * the `arrayBuffer` that will be shared by the `Buffer`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const ab = new ArrayBuffer(10);
+             * const buf = Buffer.from(ab, 0, 2);
+             *
+             * console.log(buf.length);
+             * // Prints: 2
+             * ```
+             *
+             * A `TypeError` will be thrown if `arrayBuffer` is not an `ArrayBuffer` or a
+             * `SharedArrayBuffer` or another type appropriate for `Buffer.from()`
+             * variants.
+             *
+             * It is important to remember that a backing `ArrayBuffer` can cover a range
+             * of memory that extends beyond the bounds of a `TypedArray` view. A new
+             * `Buffer` created using the `buffer` property of a `TypedArray` may extend
+             * beyond the range of the `TypedArray`:
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const arrA = Uint8Array.from([0x63, 0x64, 0x65, 0x66]); // 4 elements
+             * const arrB = new Uint8Array(arrA.buffer, 1, 2); // 2 elements
+             * console.log(arrA.buffer === arrB.buffer); // true
+             *
+             * const buf = Buffer.from(arrB.buffer);
+             * console.log(buf);
+             * // Prints: <Buffer 63 64 65 66>
+             * ```
+             * @since v5.10.0
+             * @param arrayBuffer An `ArrayBuffer`, `SharedArrayBuffer`, for example the
+             * `.buffer` property of a `TypedArray`.
+             * @param byteOffset Index of first byte to expose. **Default:** `0`.
+             * @param length Number of bytes to expose. **Default:**
+             * `arrayBuffer.byteLength - byteOffset`.
+             */
+            from(
+                arrayBuffer: WithImplicitCoercion<ArrayBufferLike>,
+                byteOffset?: number,
+                length?: number,
+            ): Buffer;
+            /**
+             * Creates a new `Buffer` containing `string`. The `encoding` parameter identifies
+             * the character encoding to be used when converting `string` into bytes.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf1 = Buffer.from('this is a tést');
+             * const buf2 = Buffer.from('7468697320697320612074c3a97374', 'hex');
+             *
+             * console.log(buf1.toString());
+             * // Prints: this is a tést
+             * console.log(buf2.toString());
+             * // Prints: this is a tést
+             * console.log(buf1.toString('latin1'));
+             * // Prints: this is a tést
+             * ```
+             *
+             * A `TypeError` will be thrown if `string` is not a string or another type
+             * appropriate for `Buffer.from()` variants.
+             *
+             * `Buffer.from(string)` may also use the internal `Buffer` pool like
+             * `Buffer.allocUnsafe()` does.
+             * @since v5.10.0
+             * @param string A string to encode.
+             * @param encoding The encoding of `string`. **Default:** `'utf8'`.
+             */
+            from(string: WithImplicitCoercion<string>, encoding?: BufferEncoding): Buffer;
+            from(arrayOrString: WithImplicitCoercion<ArrayLike<number> | string>): Buffer;
+            /**
+             * Creates a new Buffer using the passed {data}
+             * @param values to create a new Buffer
+             */
+            of(...items: number[]): Buffer;
+            /**
+             * Returns a new `Buffer` which is the result of concatenating all the `Buffer` instances in the `list` together.
+             *
+             * If the list has no items, or if the `totalLength` is 0, then a new zero-length `Buffer` is returned.
+             *
+             * If `totalLength` is not provided, it is calculated from the `Buffer` instances
+             * in `list` by adding their lengths.
+             *
+             * If `totalLength` is provided, it must be an unsigned integer. If the
+             * combined length of the `Buffer`s in `list` exceeds `totalLength`, the result is
+             * truncated to `totalLength`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Create a single `Buffer` from a list of three `Buffer` instances.
+             *
+             * const buf1 = Buffer.alloc(10);
+             * const buf2 = Buffer.alloc(14);
+             * const buf3 = Buffer.alloc(18);
+             * const totalLength = buf1.length + buf2.length + buf3.length;
+             *
+             * console.log(totalLength);
+             * // Prints: 42
+             *
+             * const bufA = Buffer.concat([buf1, buf2, buf3], totalLength);
+             *
+             * console.log(bufA);
+             * // Prints: <Buffer 00 00 00 00 ...>
+             * console.log(bufA.length);
+             * // Prints: 42
+             * ```
+             *
+             * `Buffer.concat()` may also use the internal `Buffer` pool like `Buffer.allocUnsafe()` does.
+             * @since v0.7.11
+             * @param list List of `Buffer` or {@link Uint8Array} instances to concatenate.
+             * @param totalLength Total length of the `Buffer` instances in `list` when concatenated.
+             */
+            concat(list: readonly Uint8Array[], totalLength?: number): Buffer;
+            /**
+             * Copies the underlying memory of `view` into a new `Buffer`.
+             *
+             * ```js
+             * const u16 = new Uint16Array([0, 0xffff]);
+             * const buf = Buffer.copyBytesFrom(u16, 1, 1);
+             * u16[1] = 0;
+             * console.log(buf.length); // 2
+             * console.log(buf[0]); // 255
+             * console.log(buf[1]); // 255
+             * ```
+             * @since v19.8.0
+             * @param view The {TypedArray} to copy.
+             * @param [offset=0] The starting offset within `view`.
+             * @param [length=view.length - offset] The number of elements from `view` to copy.
+             */
+            copyBytesFrom(view: NodeJS.TypedArray, offset?: number, length?: number): Buffer;
+            /**
+             * Allocates a new `Buffer` of `size` bytes. If `fill` is `undefined`, the`Buffer` will be zero-filled.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.alloc(5);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 00 00 00 00 00>
+             * ```
+             *
+             * If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown.
+             *
+             * If `fill` is specified, the allocated `Buffer` will be initialized by calling `buf.fill(fill)`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.alloc(5, 'a');
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 61 61 61 61 61>
+             * ```
+             *
+             * If both `fill` and `encoding` are specified, the allocated `Buffer` will be
+             * initialized by calling `buf.fill(fill, encoding)`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.alloc(11, 'aGVsbG8gd29ybGQ=', 'base64');
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 68 65 6c 6c 6f 20 77 6f 72 6c 64>
+             * ```
+             *
+             * Calling `Buffer.alloc()` can be measurably slower than the alternative `Buffer.allocUnsafe()` but ensures that the newly created `Buffer` instance
+             * contents will never contain sensitive data from previous allocations, including
+             * data that might not have been allocated for `Buffer`s.
+             *
+             * A `TypeError` will be thrown if `size` is not a number.
+             * @since v5.10.0
+             * @param size The desired length of the new `Buffer`.
+             * @param [fill=0] A value to pre-fill the new `Buffer` with.
+             * @param [encoding='utf8'] If `fill` is a string, this is its encoding.
+             */
+            alloc(size: number, fill?: string | Uint8Array | number, encoding?: BufferEncoding): Buffer;
+            /**
+             * Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown.
+             *
+             * The underlying memory for `Buffer` instances created in this way is _not_
+             * _initialized_. The contents of the newly created `Buffer` are unknown and _may contain sensitive data_. Use `Buffer.alloc()` instead to initialize`Buffer` instances with zeroes.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.allocUnsafe(10);
+             *
+             * console.log(buf);
+             * // Prints (contents may vary): <Buffer a0 8b 28 3f 01 00 00 00 50 32>
+             *
+             * buf.fill(0);
+             *
+             * console.log(buf);
+             * // Prints: <Buffer 00 00 00 00 00 00 00 00 00 00>
+             * ```
+             *
+             * A `TypeError` will be thrown if `size` is not a number.
+             *
+             * The `Buffer` module pre-allocates an internal `Buffer` instance of
+             * size `Buffer.poolSize` that is used as a pool for the fast allocation of new `Buffer` instances created using `Buffer.allocUnsafe()`, `Buffer.from(array)`,
+             * and `Buffer.concat()` only when `size` is less than `Buffer.poolSize >>> 1` (floor of `Buffer.poolSize` divided by two).
+             *
+             * Use of this pre-allocated internal memory pool is a key difference between
+             * calling `Buffer.alloc(size, fill)` vs. `Buffer.allocUnsafe(size).fill(fill)`.
+             * Specifically, `Buffer.alloc(size, fill)` will _never_ use the internal `Buffer`pool, while `Buffer.allocUnsafe(size).fill(fill)`_will_ use the internal`Buffer` pool if `size` is less
+             * than or equal to half `Buffer.poolSize`. The
+             * difference is subtle but can be important when an application requires the
+             * additional performance that `Buffer.allocUnsafe()` provides.
+             * @since v5.10.0
+             * @param size The desired length of the new `Buffer`.
+             */
+            allocUnsafe(size: number): Buffer;
+            /**
+             * Allocates a new `Buffer` of `size` bytes. If `size` is larger than {@link constants.MAX_LENGTH} or smaller than 0, `ERR_OUT_OF_RANGE` is thrown. A zero-length `Buffer` is created if
+             * `size` is 0.
+             *
+             * The underlying memory for `Buffer` instances created in this way is _not_
+             * _initialized_. The contents of the newly created `Buffer` are unknown and _may contain sensitive data_. Use `buf.fill(0)` to initialize
+             * such `Buffer` instances with zeroes.
+             *
+             * When using `Buffer.allocUnsafe()` to allocate new `Buffer` instances,
+             * allocations under 4 KiB are sliced from a single pre-allocated `Buffer`. This
+             * allows applications to avoid the garbage collection overhead of creating many
+             * individually allocated `Buffer` instances. This approach improves both
+             * performance and memory usage by eliminating the need to track and clean up as
+             * many individual `ArrayBuffer` objects.
+             *
+             * However, in the case where a developer may need to retain a small chunk of
+             * memory from a pool for an indeterminate amount of time, it may be appropriate
+             * to create an un-pooled `Buffer` instance using `Buffer.allocUnsafeSlow()` and
+             * then copying out the relevant bits.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Need to keep around a few small chunks of memory.
+             * const store = [];
+             *
+             * socket.on('readable', () => {
+             *   let data;
+             *   while (null !== (data = readable.read())) {
+             *     // Allocate for retained data.
+             *     const sb = Buffer.allocUnsafeSlow(10);
+             *
+             *     // Copy the data into the new allocation.
+             *     data.copy(sb, 0, 0, 10);
+             *
+             *     store.push(sb);
+             *   }
+             * });
+             * ```
+             *
+             * A `TypeError` will be thrown if `size` is not a number.
+             * @since v5.12.0
+             * @param size The desired length of the new `Buffer`.
+             */
+            allocUnsafeSlow(size: number): Buffer;
+        }
+        interface Buffer extends Uint8Array {
+            // see ../buffer.d.ts for implementation shared with all TypeScript versions
+
+            /**
+             * Returns a new `Buffer` that references the same memory as the original, but
+             * offset and cropped by the `start` and `end` indices.
+             *
+             * This method is not compatible with the `Uint8Array.prototype.slice()`,
+             * which is a superclass of `Buffer`. To copy the slice, use`Uint8Array.prototype.slice()`.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from('buffer');
+             *
+             * const copiedBuf = Uint8Array.prototype.slice.call(buf);
+             * copiedBuf[0]++;
+             * console.log(copiedBuf.toString());
+             * // Prints: cuffer
+             *
+             * console.log(buf.toString());
+             * // Prints: buffer
+             *
+             * // With buf.slice(), the original buffer is modified.
+             * const notReallyCopiedBuf = buf.slice();
+             * notReallyCopiedBuf[0]++;
+             * console.log(notReallyCopiedBuf.toString());
+             * // Prints: cuffer
+             * console.log(buf.toString());
+             * // Also prints: cuffer (!)
+             * ```
+             * @since v0.3.0
+             * @deprecated Use `subarray` instead.
+             * @param [start=0] Where the new `Buffer` will start.
+             * @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
+             */
+            slice(start?: number, end?: number): Buffer;
+            /**
+             * Returns a new `Buffer` that references the same memory as the original, but
+             * offset and cropped by the `start` and `end` indices.
+             *
+             * Specifying `end` greater than `buf.length` will return the same result as
+             * that of `end` equal to `buf.length`.
+             *
+             * This method is inherited from [`TypedArray.prototype.subarray()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/subarray).
+             *
+             * Modifying the new `Buffer` slice will modify the memory in the original `Buffer`because the allocated memory of the two objects overlap.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * // Create a `Buffer` with the ASCII alphabet, take a slice, and modify one byte
+             * // from the original `Buffer`.
+             *
+             * const buf1 = Buffer.allocUnsafe(26);
+             *
+             * for (let i = 0; i < 26; i++) {
+             *   // 97 is the decimal ASCII value for 'a'.
+             *   buf1[i] = i + 97;
+             * }
+             *
+             * const buf2 = buf1.subarray(0, 3);
+             *
+             * console.log(buf2.toString('ascii', 0, buf2.length));
+             * // Prints: abc
+             *
+             * buf1[0] = 33;
+             *
+             * console.log(buf2.toString('ascii', 0, buf2.length));
+             * // Prints: !bc
+             * ```
+             *
+             * Specifying negative indexes causes the slice to be generated relative to the
+             * end of `buf` rather than the beginning.
+             *
+             * ```js
+             * import { Buffer } from 'node:buffer';
+             *
+             * const buf = Buffer.from('buffer');
+             *
+             * console.log(buf.subarray(-6, -1).toString());
+             * // Prints: buffe
+             * // (Equivalent to buf.subarray(0, 5).)
+             *
+             * console.log(buf.subarray(-6, -2).toString());
+             * // Prints: buff
+             * // (Equivalent to buf.subarray(0, 4).)
+             *
+             * console.log(buf.subarray(-5, -2).toString());
+             * // Prints: uff
+             * // (Equivalent to buf.subarray(1, 4).)
+             * ```
+             * @since v3.0.0
+             * @param [start=0] Where the new `Buffer` will start.
+             * @param [end=buf.length] Where the new `Buffer` will end (not inclusive).
+             */
+            subarray(start?: number, end?: number): Buffer;
+        }
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type NonSharedBuffer = Buffer;
+        /**
+         * @deprecated This is intended for internal use, and will be removed once `@types/node` no longer supports
+         * TypeScript versions earlier than 5.7.
+         */
+        type AllowSharedBuffer = Buffer;
+    }
+}
diff --git a/mqtt-backend/node_modules/@types/node/ts5.6/compatibility/float16array.d.ts b/mqtt-backend/node_modules/@types/node/ts5.6/compatibility/float16array.d.ts
new file mode 100644
index 0000000..f148cc4
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/ts5.6/compatibility/float16array.d.ts
@@ -0,0 +1,71 @@
+// Interface declaration for Float16Array, required in @types/node v24+.
+// These definitions are specific to TS <=5.6.
+
+// This needs all of the "common" properties/methods of the TypedArrays,
+// otherwise the type unions `TypedArray` and `ArrayBufferView` will be
+// empty objects.
+interface Float16Array extends Pick<Float32Array, typeof Symbol.iterator | "entries" | "keys" | "values"> {
+    readonly BYTES_PER_ELEMENT: number;
+    readonly buffer: ArrayBufferLike;
+    readonly byteLength: number;
+    readonly byteOffset: number;
+    readonly length: number;
+    readonly [Symbol.toStringTag]: "Float16Array";
+    at(index: number): number | undefined;
+    copyWithin(target: number, start: number, end?: number): this;
+    every(predicate: (value: number, index: number, array: Float16Array) => unknown, thisArg?: any): boolean;
+    fill(value: number, start?: number, end?: number): this;
+    filter(predicate: (value: number, index: number, array: Float16Array) => any, thisArg?: any): Float16Array;
+    find(predicate: (value: number, index: number, obj: Float16Array) => boolean, thisArg?: any): number | undefined;
+    findIndex(predicate: (value: number, index: number, obj: Float16Array) => boolean, thisArg?: any): number;
+    findLast<S extends number>(
+        predicate: (value: number, index: number, array: Float16Array) => value is S,
+        thisArg?: any,
+    ): S | undefined;
+    findLast(
+        predicate: (value: number, index: number, array: Float16Array) => unknown,
+        thisArg?: any,
+    ): number | undefined;
+    findLastIndex(predicate: (value: number, index: number, array: Float16Array) => unknown, thisArg?: any): number;
+    forEach(callbackfn: (value: number, index: number, array: Float16Array) => void, thisArg?: any): void;
+    includes(searchElement: number, fromIndex?: number): boolean;
+    indexOf(searchElement: number, fromIndex?: number): number;
+    join(separator?: string): string;
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+    map(callbackfn: (value: number, index: number, array: Float16Array) => number, thisArg?: any): Float16Array;
+    reduce(
+        callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float16Array) => number,
+    ): number;
+    reduce(
+        callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float16Array) => number,
+        initialValue: number,
+    ): number;
+    reduce<U>(
+        callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float16Array) => U,
+        initialValue: U,
+    ): U;
+    reduceRight(
+        callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float16Array) => number,
+    ): number;
+    reduceRight(
+        callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: Float16Array) => number,
+        initialValue: number,
+    ): number;
+    reduceRight<U>(
+        callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: Float16Array) => U,
+        initialValue: U,
+    ): U;
+    reverse(): Float16Array;
+    set(array: ArrayLike<number>, offset?: number): void;
+    slice(start?: number, end?: number): Float16Array;
+    some(predicate: (value: number, index: number, array: Float16Array) => unknown, thisArg?: any): boolean;
+    sort(compareFn?: (a: number, b: number) => number): this;
+    subarray(begin?: number, end?: number): Float16Array;
+    toLocaleString(locales: string | string[], options?: Intl.NumberFormatOptions): string;
+    toReversed(): Float16Array;
+    toSorted(compareFn?: (a: number, b: number) => number): Float16Array;
+    toString(): string;
+    valueOf(): Float16Array;
+    with(index: number, value: number): Float16Array;
+    [index: number]: number;
+}
diff --git a/mqtt-backend/node_modules/@types/node/ts5.6/globals.typedarray.d.ts b/mqtt-backend/node_modules/@types/node/ts5.6/globals.typedarray.d.ts
new file mode 100644
index 0000000..57a1ab4
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/ts5.6/globals.typedarray.d.ts
@@ -0,0 +1,36 @@
+export {}; // Make this a module
+
+declare global {
+    namespace NodeJS {
+        type TypedArray =
+            | Uint8Array
+            | Uint8ClampedArray
+            | Uint16Array
+            | Uint32Array
+            | Int8Array
+            | Int16Array
+            | Int32Array
+            | BigUint64Array
+            | BigInt64Array
+            | Float16Array
+            | Float32Array
+            | Float64Array;
+        type ArrayBufferView = TypedArray | DataView;
+
+        type NonSharedUint8Array = Uint8Array;
+        type NonSharedUint8ClampedArray = Uint8ClampedArray;
+        type NonSharedUint16Array = Uint16Array;
+        type NonSharedUint32Array = Uint32Array;
+        type NonSharedInt8Array = Int8Array;
+        type NonSharedInt16Array = Int16Array;
+        type NonSharedInt32Array = Int32Array;
+        type NonSharedBigUint64Array = BigUint64Array;
+        type NonSharedBigInt64Array = BigInt64Array;
+        type NonSharedFloat16Array = Float16Array;
+        type NonSharedFloat32Array = Float32Array;
+        type NonSharedFloat64Array = Float64Array;
+        type NonSharedDataView = DataView;
+        type NonSharedTypedArray = TypedArray;
+        type NonSharedArrayBufferView = ArrayBufferView;
+    }
+}
diff --git a/mqtt-backend/node_modules/@types/node/ts5.6/index.d.ts b/mqtt-backend/node_modules/@types/node/ts5.6/index.d.ts
new file mode 100644
index 0000000..a157660
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/ts5.6/index.d.ts
@@ -0,0 +1,117 @@
+/**
+ * License for programmatically and manually incorporated
+ * documentation aka. `JSDoc` from https://github.com/nodejs/node/tree/master/doc
+ *
+ * Copyright Node.js contributors. All rights reserved.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+// NOTE: These definitions support Node.js and TypeScript 5.2 through 5.6.
+
+// Reference required TypeScript libraries:
+/// <reference lib="es2020" />
+/// <reference lib="esnext.disposable" />
+
+// TypeScript library polyfills required for TypeScript <=5.6:
+/// <reference path="./compatibility/float16array.d.ts" />
+
+// Iterator definitions required for compatibility with TypeScript <5.6:
+/// <reference path="../compatibility/iterators.d.ts" />
+
+// Definitions for Node.js modules specific to TypeScript <=5.6:
+/// <reference path="./globals.typedarray.d.ts" />
+/// <reference path="./buffer.buffer.d.ts" />
+
+// Definitions for Node.js modules that are not specific to any version of TypeScript:
+/// <reference path="../globals.d.ts" />
+/// <reference path="../web-globals/abortcontroller.d.ts" />
+/// <reference path="../web-globals/blob.d.ts" />
+/// <reference path="../web-globals/console.d.ts" />
+/// <reference path="../web-globals/crypto.d.ts" />
+/// <reference path="../web-globals/domexception.d.ts" />
+/// <reference path="../web-globals/encoding.d.ts" />
+/// <reference path="../web-globals/events.d.ts" />
+/// <reference path="../web-globals/fetch.d.ts" />
+/// <reference path="../web-globals/importmeta.d.ts" />
+/// <reference path="../web-globals/messaging.d.ts" />
+/// <reference path="../web-globals/navigator.d.ts" />
+/// <reference path="../web-globals/performance.d.ts" />
+/// <reference path="../web-globals/storage.d.ts" />
+/// <reference path="../web-globals/streams.d.ts" />
+/// <reference path="../web-globals/timers.d.ts" />
+/// <reference path="../web-globals/url.d.ts" />
+/// <reference path="../assert.d.ts" />
+/// <reference path="../assert/strict.d.ts" />
+/// <reference path="../async_hooks.d.ts" />
+/// <reference path="../buffer.d.ts" />
+/// <reference path="../child_process.d.ts" />
+/// <reference path="../cluster.d.ts" />
+/// <reference path="../console.d.ts" />
+/// <reference path="../constants.d.ts" />
+/// <reference path="../crypto.d.ts" />
+/// <reference path="../dgram.d.ts" />
+/// <reference path="../diagnostics_channel.d.ts" />
+/// <reference path="../dns.d.ts" />
+/// <reference path="../dns/promises.d.ts" />
+/// <reference path="../domain.d.ts" />
+/// <reference path="../events.d.ts" />
+/// <reference path="../fs.d.ts" />
+/// <reference path="../fs/promises.d.ts" />
+/// <reference path="../http.d.ts" />
+/// <reference path="../http2.d.ts" />
+/// <reference path="../https.d.ts" />
+/// <reference path="../inspector.d.ts" />
+/// <reference path="../inspector.generated.d.ts" />
+/// <reference path="../inspector/promises.d.ts" />
+/// <reference path="../module.d.ts" />
+/// <reference path="../net.d.ts" />
+/// <reference path="../os.d.ts" />
+/// <reference path="../path.d.ts" />
+/// <reference path="../path/posix.d.ts" />
+/// <reference path="../path/win32.d.ts" />
+/// <reference path="../perf_hooks.d.ts" />
+/// <reference path="../process.d.ts" />
+/// <reference path="../punycode.d.ts" />
+/// <reference path="../querystring.d.ts" />
+/// <reference path="../quic.d.ts" />
+/// <reference path="../readline.d.ts" />
+/// <reference path="../readline/promises.d.ts" />
+/// <reference path="../repl.d.ts" />
+/// <reference path="../sea.d.ts" />
+/// <reference path="../sqlite.d.ts" />
+/// <reference path="../stream.d.ts" />
+/// <reference path="../stream/consumers.d.ts" />
+/// <reference path="../stream/promises.d.ts" />
+/// <reference path="../stream/web.d.ts" />
+/// <reference path="../string_decoder.d.ts" />
+/// <reference path="../test.d.ts" />
+/// <reference path="../test/reporters.d.ts" />
+/// <reference path="../timers.d.ts" />
+/// <reference path="../timers/promises.d.ts" />
+/// <reference path="../tls.d.ts" />
+/// <reference path="../trace_events.d.ts" />
+/// <reference path="../tty.d.ts" />
+/// <reference path="../url.d.ts" />
+/// <reference path="../util.d.ts" />
+/// <reference path="../util/types.d.ts" />
+/// <reference path="../v8.d.ts" />
+/// <reference path="../vm.d.ts" />
+/// <reference path="../wasi.d.ts" />
+/// <reference path="../worker_threads.d.ts" />
+/// <reference path="../zlib.d.ts" />
diff --git a/mqtt-backend/node_modules/@types/node/ts5.7/compatibility/float16array.d.ts b/mqtt-backend/node_modules/@types/node/ts5.7/compatibility/float16array.d.ts
new file mode 100644
index 0000000..110b1eb
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/ts5.7/compatibility/float16array.d.ts
@@ -0,0 +1,72 @@
+// Interface declaration for Float16Array, required in @types/node v24+.
+// These definitions are specific to TS 5.7.
+
+// This needs all of the "common" properties/methods of the TypedArrays,
+// otherwise the type unions `TypedArray` and `ArrayBufferView` will be
+// empty objects.
+interface Float16Array<TArrayBuffer extends ArrayBufferLike = ArrayBufferLike> {
+    readonly BYTES_PER_ELEMENT: number;
+    readonly buffer: TArrayBuffer;
+    readonly byteLength: number;
+    readonly byteOffset: number;
+    readonly length: number;
+    readonly [Symbol.toStringTag]: "Float16Array";
+    at(index: number): number | undefined;
+    copyWithin(target: number, start: number, end?: number): this;
+    entries(): ArrayIterator<[number, number]>;
+    every(predicate: (value: number, index: number, array: this) => unknown, thisArg?: any): boolean;
+    fill(value: number, start?: number, end?: number): this;
+    filter(predicate: (value: number, index: number, array: this) => any, thisArg?: any): Float16Array<ArrayBuffer>;
+    find(predicate: (value: number, index: number, obj: this) => boolean, thisArg?: any): number | undefined;
+    findIndex(predicate: (value: number, index: number, obj: this) => boolean, thisArg?: any): number;
+    findLast<S extends number>(
+        predicate: (value: number, index: number, array: this) => value is S,
+        thisArg?: any,
+    ): S | undefined;
+    findLast(predicate: (value: number, index: number, array: this) => unknown, thisArg?: any): number | undefined;
+    findLastIndex(predicate: (value: number, index: number, array: this) => unknown, thisArg?: any): number;
+    forEach(callbackfn: (value: number, index: number, array: this) => void, thisArg?: any): void;
+    includes(searchElement: number, fromIndex?: number): boolean;
+    indexOf(searchElement: number, fromIndex?: number): number;
+    join(separator?: string): string;
+    keys(): ArrayIterator<number>;
+    lastIndexOf(searchElement: number, fromIndex?: number): number;
+    map(callbackfn: (value: number, index: number, array: this) => number, thisArg?: any): Float16Array<ArrayBuffer>;
+    reduce(
+        callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: this) => number,
+    ): number;
+    reduce(
+        callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: this) => number,
+        initialValue: number,
+    ): number;
+    reduce<U>(
+        callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: this) => U,
+        initialValue: U,
+    ): U;
+    reduceRight(
+        callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: this) => number,
+    ): number;
+    reduceRight(
+        callbackfn: (previousValue: number, currentValue: number, currentIndex: number, array: this) => number,
+        initialValue: number,
+    ): number;
+    reduceRight<U>(
+        callbackfn: (previousValue: U, currentValue: number, currentIndex: number, array: this) => U,
+        initialValue: U,
+    ): U;
+    reverse(): this;
+    set(array: ArrayLike<number>, offset?: number): void;
+    slice(start?: number, end?: number): Float16Array<ArrayBuffer>;
+    some(predicate: (value: number, index: number, array: this) => unknown, thisArg?: any): boolean;
+    sort(compareFn?: (a: number, b: number) => number): this;
+    subarray(begin?: number, end?: number): Float16Array<TArrayBuffer>;
+    toLocaleString(locales: string | string[], options?: Intl.NumberFormatOptions): string;
+    toReversed(): Float16Array<ArrayBuffer>;
+    toSorted(compareFn?: (a: number, b: number) => number): Float16Array<ArrayBuffer>;
+    toString(): string;
+    valueOf(): this;
+    values(): ArrayIterator<number>;
+    with(index: number, value: number): Float16Array<ArrayBuffer>;
+    [Symbol.iterator](): ArrayIterator<number>;
+    [index: number]: number;
+}
diff --git a/mqtt-backend/node_modules/@types/node/ts5.7/index.d.ts b/mqtt-backend/node_modules/@types/node/ts5.7/index.d.ts
new file mode 100644
index 0000000..32c541b
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/ts5.7/index.d.ts
@@ -0,0 +1,117 @@
+/**
+ * License for programmatically and manually incorporated
+ * documentation aka. `JSDoc` from https://github.com/nodejs/node/tree/master/doc
+ *
+ * Copyright Node.js contributors. All rights reserved.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+// NOTE: These definitions support Node.js and TypeScript 5.7.
+
+// Reference required TypeScript libraries:
+/// <reference lib="es2020" />
+/// <reference lib="esnext.disposable" />
+
+// TypeScript library polyfills required for TypeScript 5.7:
+/// <reference path="./compatibility/float16array.d.ts" />
+
+// Iterator definitions required for compatibility with TypeScript <5.6:
+/// <reference path="../compatibility/iterators.d.ts" />
+
+// Definitions for Node.js modules specific to TypeScript 5.7+:
+/// <reference path="../globals.typedarray.d.ts" />
+/// <reference path="../buffer.buffer.d.ts" />
+
+// Definitions for Node.js modules that are not specific to any version of TypeScript:
+/// <reference path="../globals.d.ts" />
+/// <reference path="../web-globals/abortcontroller.d.ts" />
+/// <reference path="../web-globals/blob.d.ts" />
+/// <reference path="../web-globals/console.d.ts" />
+/// <reference path="../web-globals/crypto.d.ts" />
+/// <reference path="../web-globals/domexception.d.ts" />
+/// <reference path="../web-globals/encoding.d.ts" />
+/// <reference path="../web-globals/events.d.ts" />
+/// <reference path="../web-globals/fetch.d.ts" />
+/// <reference path="../web-globals/importmeta.d.ts" />
+/// <reference path="../web-globals/messaging.d.ts" />
+/// <reference path="../web-globals/navigator.d.ts" />
+/// <reference path="../web-globals/performance.d.ts" />
+/// <reference path="../web-globals/storage.d.ts" />
+/// <reference path="../web-globals/streams.d.ts" />
+/// <reference path="../web-globals/timers.d.ts" />
+/// <reference path="../web-globals/url.d.ts" />
+/// <reference path="../assert.d.ts" />
+/// <reference path="../assert/strict.d.ts" />
+/// <reference path="../async_hooks.d.ts" />
+/// <reference path="../buffer.d.ts" />
+/// <reference path="../child_process.d.ts" />
+/// <reference path="../cluster.d.ts" />
+/// <reference path="../console.d.ts" />
+/// <reference path="../constants.d.ts" />
+/// <reference path="../crypto.d.ts" />
+/// <reference path="../dgram.d.ts" />
+/// <reference path="../diagnostics_channel.d.ts" />
+/// <reference path="../dns.d.ts" />
+/// <reference path="../dns/promises.d.ts" />
+/// <reference path="../domain.d.ts" />
+/// <reference path="../events.d.ts" />
+/// <reference path="../fs.d.ts" />
+/// <reference path="../fs/promises.d.ts" />
+/// <reference path="../http.d.ts" />
+/// <reference path="../http2.d.ts" />
+/// <reference path="../https.d.ts" />
+/// <reference path="../inspector.d.ts" />
+/// <reference path="../inspector.generated.d.ts" />
+/// <reference path="../inspector/promises.d.ts" />
+/// <reference path="../module.d.ts" />
+/// <reference path="../net.d.ts" />
+/// <reference path="../os.d.ts" />
+/// <reference path="../path.d.ts" />
+/// <reference path="../path/posix.d.ts" />
+/// <reference path="../path/win32.d.ts" />
+/// <reference path="../perf_hooks.d.ts" />
+/// <reference path="../process.d.ts" />
+/// <reference path="../punycode.d.ts" />
+/// <reference path="../querystring.d.ts" />
+/// <reference path="../quic.d.ts" />
+/// <reference path="../readline.d.ts" />
+/// <reference path="../readline/promises.d.ts" />
+/// <reference path="../repl.d.ts" />
+/// <reference path="../sea.d.ts" />
+/// <reference path="../sqlite.d.ts" />
+/// <reference path="../stream.d.ts" />
+/// <reference path="../stream/consumers.d.ts" />
+/// <reference path="../stream/promises.d.ts" />
+/// <reference path="../stream/web.d.ts" />
+/// <reference path="../string_decoder.d.ts" />
+/// <reference path="../test.d.ts" />
+/// <reference path="../test/reporters.d.ts" />
+/// <reference path="../timers.d.ts" />
+/// <reference path="../timers/promises.d.ts" />
+/// <reference path="../tls.d.ts" />
+/// <reference path="../trace_events.d.ts" />
+/// <reference path="../tty.d.ts" />
+/// <reference path="../url.d.ts" />
+/// <reference path="../util.d.ts" />
+/// <reference path="../util/types.d.ts" />
+/// <reference path="../v8.d.ts" />
+/// <reference path="../vm.d.ts" />
+/// <reference path="../wasi.d.ts" />
+/// <reference path="../worker_threads.d.ts" />
+/// <reference path="../zlib.d.ts" />
diff --git a/mqtt-backend/node_modules/@types/node/tty.d.ts b/mqtt-backend/node_modules/@types/node/tty.d.ts
new file mode 100644
index 0000000..39b4a7f
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/tty.d.ts
@@ -0,0 +1,225 @@
+declare module "node:tty" {
+    import * as net from "node:net";
+    /**
+     * The `tty.isatty()` method returns `true` if the given `fd` is associated with
+     * a TTY and `false` if it is not, including whenever `fd` is not a non-negative
+     * integer.
+     * @since v0.5.8
+     * @param fd A numeric file descriptor
+     */
+    function isatty(fd: number): boolean;
+    /**
+     * Represents the readable side of a TTY. In normal circumstances `process.stdin` will be the only `tty.ReadStream` instance in a Node.js
+     * process and there should be no reason to create additional instances.
+     * @since v0.5.8
+     */
+    class ReadStream extends net.Socket {
+        constructor(fd: number, options?: net.SocketConstructorOpts);
+        /**
+         * A `boolean` that is `true` if the TTY is currently configured to operate as a
+         * raw device.
+         *
+         * This flag is always `false` when a process starts, even if the terminal is
+         * operating in raw mode. Its value will change with subsequent calls to `setRawMode`.
+         * @since v0.7.7
+         */
+        isRaw: boolean;
+        /**
+         * Allows configuration of `tty.ReadStream` so that it operates as a raw device.
+         *
+         * When in raw mode, input is always available character-by-character, not
+         * including modifiers. Additionally, all special processing of characters by the
+         * terminal is disabled, including echoing input
+         * characters. Ctrl+C will no longer cause a `SIGINT` when
+         * in this mode.
+         * @since v0.7.7
+         * @param mode If `true`, configures the `tty.ReadStream` to operate as a raw device. If `false`, configures the `tty.ReadStream` to operate in its default mode. The `readStream.isRaw`
+         * property will be set to the resulting mode.
+         * @return The read stream instance.
+         */
+        setRawMode(mode: boolean): this;
+        /**
+         * A `boolean` that is always `true` for `tty.ReadStream` instances.
+         * @since v0.5.8
+         */
+        isTTY: boolean;
+    }
+    /**
+     * -1 - to the left from cursor
+     *  0 - the entire line
+     *  1 - to the right from cursor
+     */
+    type Direction = -1 | 0 | 1;
+    interface WriteStreamEventMap extends net.SocketEventMap {
+        "resize": [];
+    }
+    /**
+     * Represents the writable side of a TTY. In normal circumstances, `process.stdout` and `process.stderr` will be the only`tty.WriteStream` instances created for a Node.js process and there
+     * should be no reason to create additional instances.
+     * @since v0.5.8
+     */
+    class WriteStream extends net.Socket {
+        constructor(fd: number);
+        /**
+         * `writeStream.clearLine()` clears the current line of this `WriteStream` in a
+         * direction identified by `dir`.
+         * @since v0.7.7
+         * @param callback Invoked once the operation completes.
+         * @return `false` if the stream wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
+         */
+        clearLine(dir: Direction, callback?: () => void): boolean;
+        /**
+         * `writeStream.clearScreenDown()` clears this `WriteStream` from the current
+         * cursor down.
+         * @since v0.7.7
+         * @param callback Invoked once the operation completes.
+         * @return `false` if the stream wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
+         */
+        clearScreenDown(callback?: () => void): boolean;
+        /**
+         * `writeStream.cursorTo()` moves this `WriteStream`'s cursor to the specified
+         * position.
+         * @since v0.7.7
+         * @param callback Invoked once the operation completes.
+         * @return `false` if the stream wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
+         */
+        cursorTo(x: number, y?: number, callback?: () => void): boolean;
+        cursorTo(x: number, callback: () => void): boolean;
+        /**
+         * `writeStream.moveCursor()` moves this `WriteStream`'s cursor _relative_ to its
+         * current position.
+         * @since v0.7.7
+         * @param callback Invoked once the operation completes.
+         * @return `false` if the stream wishes for the calling code to wait for the `'drain'` event to be emitted before continuing to write additional data; otherwise `true`.
+         */
+        moveCursor(dx: number, dy: number, callback?: () => void): boolean;
+        /**
+         * Returns:
+         *
+         * * `1` for 2,
+         * * `4` for 16,
+         * * `8` for 256,
+         * * `24` for 16,777,216 colors supported.
+         *
+         * Use this to determine what colors the terminal supports. Due to the nature of
+         * colors in terminals it is possible to either have false positives or false
+         * negatives. It depends on process information and the environment variables that
+         * may lie about what terminal is used.
+         * It is possible to pass in an `env` object to simulate the usage of a specific
+         * terminal. This can be useful to check how specific environment settings behave.
+         *
+         * To enforce a specific color support, use one of the below environment settings.
+         *
+         * * 2 colors: `FORCE_COLOR = 0` (Disables colors)
+         * * 16 colors: `FORCE_COLOR = 1`
+         * * 256 colors: `FORCE_COLOR = 2`
+         * * 16,777,216 colors: `FORCE_COLOR = 3`
+         *
+         * Disabling color support is also possible by using the `NO_COLOR` and `NODE_DISABLE_COLORS` environment variables.
+         * @since v9.9.0
+         * @param [env=process.env] An object containing the environment variables to check. This enables simulating the usage of a specific terminal.
+         */
+        getColorDepth(env?: object): number;
+        /**
+         * Returns `true` if the `writeStream` supports at least as many colors as provided
+         * in `count`. Minimum support is 2 (black and white).
+         *
+         * This has the same false positives and negatives as described in `writeStream.getColorDepth()`.
+         *
+         * ```js
+         * process.stdout.hasColors();
+         * // Returns true or false depending on if `stdout` supports at least 16 colors.
+         * process.stdout.hasColors(256);
+         * // Returns true or false depending on if `stdout` supports at least 256 colors.
+         * process.stdout.hasColors({ TMUX: '1' });
+         * // Returns true.
+         * process.stdout.hasColors(2 ** 24, { TMUX: '1' });
+         * // Returns false (the environment setting pretends to support 2 ** 8 colors).
+         * ```
+         * @since v11.13.0, v10.16.0
+         * @param [count=16] The number of colors that are requested (minimum 2).
+         * @param [env=process.env] An object containing the environment variables to check. This enables simulating the usage of a specific terminal.
+         */
+        hasColors(count?: number): boolean;
+        hasColors(env?: object): boolean;
+        hasColors(count: number, env?: object): boolean;
+        /**
+         * `writeStream.getWindowSize()` returns the size of the TTY
+         * corresponding to this `WriteStream`. The array is of the type `[numColumns, numRows]` where `numColumns` and `numRows` represent the number
+         * of columns and rows in the corresponding TTY.
+         * @since v0.7.7
+         */
+        getWindowSize(): [number, number];
+        /**
+         * A `number` specifying the number of columns the TTY currently has. This property
+         * is updated whenever the `'resize'` event is emitted.
+         * @since v0.7.7
+         */
+        columns: number;
+        /**
+         * A `number` specifying the number of rows the TTY currently has. This property
+         * is updated whenever the `'resize'` event is emitted.
+         * @since v0.7.7
+         */
+        rows: number;
+        /**
+         * A `boolean` that is always `true`.
+         * @since v0.5.8
+         */
+        isTTY: boolean;
+        // #region InternalEventEmitter
+        addListener<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        addListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        emit<E extends keyof WriteStreamEventMap>(eventName: E, ...args: WriteStreamEventMap[E]): boolean;
+        emit(eventName: string | symbol, ...args: any[]): boolean;
+        listenerCount<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener?: (...args: WriteStreamEventMap[E]) => void,
+        ): number;
+        listenerCount(eventName: string | symbol, listener?: (...args: any[]) => void): number;
+        listeners<E extends keyof WriteStreamEventMap>(eventName: E): ((...args: WriteStreamEventMap[E]) => void)[];
+        listeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        off<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        on<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        on(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        once<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        once(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependListener<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        prependListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        prependOnceListener<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        prependOnceListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        rawListeners<E extends keyof WriteStreamEventMap>(eventName: E): ((...args: WriteStreamEventMap[E]) => void)[];
+        rawListeners(eventName: string | symbol): ((...args: any[]) => void)[];
+        // eslint-disable-next-line @definitelytyped/no-unnecessary-generics
+        removeAllListeners<E extends keyof WriteStreamEventMap>(eventName?: E): this;
+        removeAllListeners(eventName?: string | symbol): this;
+        removeListener<E extends keyof WriteStreamEventMap>(
+            eventName: E,
+            listener: (...args: WriteStreamEventMap[E]) => void,
+        ): this;
+        removeListener(eventName: string | symbol, listener: (...args: any[]) => void): this;
+        // #endregion
+    }
+}
+declare module "tty" {
+    export * from "node:tty";
+}
diff --git a/mqtt-backend/node_modules/@types/node/url.d.ts b/mqtt-backend/node_modules/@types/node/url.d.ts
new file mode 100644
index 0000000..8803a03
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/url.d.ts
@@ -0,0 +1,532 @@
+declare module "node:url" {
+    import { Blob, NonSharedBuffer } from "node:buffer";
+    import { ClientRequestArgs } from "node:http";
+    import { ParsedUrlQuery, ParsedUrlQueryInput } from "node:querystring";
+    // Input to `url.format`
+    interface UrlObject {
+        auth?: string | null | undefined;
+        hash?: string | null | undefined;
+        host?: string | null | undefined;
+        hostname?: string | null | undefined;
+        href?: string | null | undefined;
+        pathname?: string | null | undefined;
+        protocol?: string | null | undefined;
+        search?: string | null | undefined;
+        slashes?: boolean | null | undefined;
+        port?: string | number | null | undefined;
+        query?: string | null | ParsedUrlQueryInput | undefined;
+    }
+    // Output of `url.parse`
+    interface Url {
+        auth: string | null;
+        hash: string | null;
+        host: string | null;
+        hostname: string | null;
+        href: string;
+        path: string | null;
+        pathname: string | null;
+        protocol: string | null;
+        search: string | null;
+        slashes: boolean | null;
+        port: string | null;
+        query: string | null | ParsedUrlQuery;
+    }
+    interface UrlWithParsedQuery extends Url {
+        query: ParsedUrlQuery;
+    }
+    interface UrlWithStringQuery extends Url {
+        query: string | null;
+    }
+    interface FileUrlToPathOptions {
+        /**
+         * `true` if the `path` should be return as a windows filepath, `false` for posix, and `undefined` for the system default.
+         * @default undefined
+         * @since v22.1.0
+         */
+        windows?: boolean | undefined;
+    }
+    interface PathToFileUrlOptions {
+        /**
+         * `true` if the `path` should be return as a windows filepath, `false` for posix, and `undefined` for the system default.
+         * @default undefined
+         * @since v22.1.0
+         */
+        windows?: boolean | undefined;
+    }
+    /**
+     * The `url.parse()` method takes a URL string, parses it, and returns a URL
+     * object.
+     *
+     * A `TypeError` is thrown if `urlString` is not a string.
+     *
+     * A `URIError` is thrown if the `auth` property is present but cannot be decoded.
+     *
+     * `url.parse()` uses a lenient, non-standard algorithm for parsing URL
+     * strings. It is prone to security issues such as [host name spoofing](https://hackerone.com/reports/678487)
+     * and incorrect handling of usernames and passwords. Do not use with untrusted
+     * input. CVEs are not issued for `url.parse()` vulnerabilities. Use the
+     * [WHATWG URL](https://nodejs.org/docs/latest-v25.x/api/url.html#the-whatwg-url-api) API instead, for example:
+     *
+     * ```js
+     * function getURL(req) {
+     *   const proto = req.headers['x-forwarded-proto'] || 'https';
+     *   const host = req.headers['x-forwarded-host'] || req.headers.host || 'example.com';
+     *   return new URL(req.url || '/', `${proto}://${host}`);
+     * }
+     * ```
+     *
+     * The example above assumes well-formed headers are forwarded from a reverse
+     * proxy to your Node.js server. If you are not using a reverse proxy, you should
+     * use the example below:
+     *
+     * ```js
+     * function getURL(req) {
+     *   return new URL(req.url || '/', 'https://example.com');
+     * }
+     * ```
+     * @since v0.1.25
+     * @deprecated Use the WHATWG URL API instead.
+     * @param urlString The URL string to parse.
+     * @param parseQueryString If `true`, the `query` property will always
+     * be set to an object returned by the [`querystring`](https://nodejs.org/docs/latest-v25.x/api/querystring.html) module's `parse()`
+     * method. If `false`, the `query` property on the returned URL object will be an
+     * unparsed, undecoded string. **Default:** `false`.
+     * @param slashesDenoteHost If `true`, the first token after the literal
+     * string `//` and preceding the next `/` will be interpreted as the `host`.
+     * For instance, given `//foo/bar`, the result would be
+     * `{host: 'foo', pathname: '/bar'}` rather than `{pathname: '//foo/bar'}`.
+     * **Default:** `false`.
+     */
+    function parse(
+        urlString: string,
+        parseQueryString?: false,
+        slashesDenoteHost?: boolean,
+    ): UrlWithStringQuery;
+    function parse(urlString: string, parseQueryString: true, slashesDenoteHost?: boolean): UrlWithParsedQuery;
+    function parse(urlString: string, parseQueryString: boolean, slashesDenoteHost?: boolean): Url;
+    /**
+     * The `url.format()` method returns a formatted URL string derived from `urlObject`.
+     *
+     * ```js
+     * import url from 'node:url';
+     * url.format({
+     *   protocol: 'https',
+     *   hostname: 'example.com',
+     *   pathname: '/some/path',
+     *   query: {
+     *     page: 1,
+     *     format: 'json',
+     *   },
+     * });
+     *
+     * // => 'https://example.com/some/path?page=1&#x26;format=json'
+     * ```
+     *
+     * If `urlObject` is not an object or a string, `url.format()` will throw a `TypeError`.
+     *
+     * The formatting process operates as follows:
+     *
+     * * A new empty string `result` is created.
+     * * If `urlObject.protocol` is a string, it is appended as-is to `result`.
+     * * Otherwise, if `urlObject.protocol` is not `undefined` and is not a string, an `Error` is thrown.
+     * * For all string values of `urlObject.protocol` that _do not end_ with an ASCII
+     * colon (`:`) character, the literal string `:` will be appended to `result`.
+     * * If either of the following conditions is true, then the literal string `//` will be appended to `result`:
+     *    * `urlObject.slashes` property is true;
+     *    * `urlObject.protocol` begins with `http`, `https`, `ftp`, `gopher`, or `file`;
+     * * If the value of the `urlObject.auth` property is truthy, and either `urlObject.host` or `urlObject.hostname` are not `undefined`, the value of `urlObject.auth` will be coerced into a string
+     * and appended to `result` followed by the literal string `@`.
+     * * If the `urlObject.host` property is `undefined` then:
+     *    * If the `urlObject.hostname` is a string, it is appended to `result`.
+     *    * Otherwise, if `urlObject.hostname` is not `undefined` and is not a string,
+     *    an `Error` is thrown.
+     *    * If the `urlObject.port` property value is truthy, and `urlObject.hostname` is not `undefined`:
+     *          * The literal string `:` is appended to `result`, and
+     *          * The value of `urlObject.port` is coerced to a string and appended to `result`.
+     * * Otherwise, if the `urlObject.host` property value is truthy, the value of `urlObject.host` is coerced to a string and appended to `result`.
+     * * If the `urlObject.pathname` property is a string that is not an empty string:
+     *    * If the `urlObject.pathname` _does not start_ with an ASCII forward slash
+     *    (`/`), then the literal string `'/'` is appended to `result`.
+     *    * The value of `urlObject.pathname` is appended to `result`.
+     * * Otherwise, if `urlObject.pathname` is not `undefined` and is not a string, an `Error` is thrown.
+     * * If the `urlObject.search` property is `undefined` and if the `urlObject.query`property is an `Object`, the literal string `?` is appended to `result` followed by the output of calling the
+     * `querystring` module's `stringify()` method passing the value of `urlObject.query`.
+     * * Otherwise, if `urlObject.search` is a string:
+     *    * If the value of `urlObject.search` _does not start_ with the ASCII question
+     *    mark (`?`) character, the literal string `?` is appended to `result`.
+     *    * The value of `urlObject.search` is appended to `result`.
+     * * Otherwise, if `urlObject.search` is not `undefined` and is not a string, an `Error` is thrown.
+     * * If the `urlObject.hash` property is a string:
+     *    * If the value of `urlObject.hash` _does not start_ with the ASCII hash (`#`)
+     *    character, the literal string `#` is appended to `result`.
+     *    * The value of `urlObject.hash` is appended to `result`.
+     * * Otherwise, if the `urlObject.hash` property is not `undefined` and is not a
+     * string, an `Error` is thrown.
+     * * `result` is returned.
+     * @since v0.1.25
+     * @legacy Use the WHATWG URL API instead.
+     * @param urlObject A URL object (as returned by `url.parse()` or constructed otherwise). If a string, it is converted to an object by passing it to `url.parse()`.
+     */
+    function format(urlObject: URL, options?: URLFormatOptions): string;
+    /**
+     * The `url.format()` method returns a formatted URL string derived from `urlObject`.
+     *
+     * ```js
+     * import url from 'node:url';
+     * url.format({
+     *   protocol: 'https',
+     *   hostname: 'example.com',
+     *   pathname: '/some/path',
+     *   query: {
+     *     page: 1,
+     *     format: 'json',
+     *   },
+     * });
+     *
+     * // => 'https://example.com/some/path?page=1&#x26;format=json'
+     * ```
+     *
+     * If `urlObject` is not an object or a string, `url.format()` will throw a `TypeError`.
+     *
+     * The formatting process operates as follows:
+     *
+     * * A new empty string `result` is created.
+     * * If `urlObject.protocol` is a string, it is appended as-is to `result`.
+     * * Otherwise, if `urlObject.protocol` is not `undefined` and is not a string, an `Error` is thrown.
+     * * For all string values of `urlObject.protocol` that _do not end_ with an ASCII
+     * colon (`:`) character, the literal string `:` will be appended to `result`.
+     * * If either of the following conditions is true, then the literal string `//` will be appended to `result`:
+     *    * `urlObject.slashes` property is true;
+     *    * `urlObject.protocol` begins with `http`, `https`, `ftp`, `gopher`, or `file`;
+     * * If the value of the `urlObject.auth` property is truthy, and either `urlObject.host` or `urlObject.hostname` are not `undefined`, the value of `urlObject.auth` will be coerced into a string
+     * and appended to `result` followed by the literal string `@`.
+     * * If the `urlObject.host` property is `undefined` then:
+     *    * If the `urlObject.hostname` is a string, it is appended to `result`.
+     *    * Otherwise, if `urlObject.hostname` is not `undefined` and is not a string,
+     *    an `Error` is thrown.
+     *    * If the `urlObject.port` property value is truthy, and `urlObject.hostname` is not `undefined`:
+     *          * The literal string `:` is appended to `result`, and
+     *          * The value of `urlObject.port` is coerced to a string and appended to `result`.
+     * * Otherwise, if the `urlObject.host` property value is truthy, the value of `urlObject.host` is coerced to a string and appended to `result`.
+     * * If the `urlObject.pathname` property is a string that is not an empty string:
+     *    * If the `urlObject.pathname` _does not start_ with an ASCII forward slash
+     *    (`/`), then the literal string `'/'` is appended to `result`.
+     *    * The value of `urlObject.pathname` is appended to `result`.
+     * * Otherwise, if `urlObject.pathname` is not `undefined` and is not a string, an `Error` is thrown.
+     * * If the `urlObject.search` property is `undefined` and if the `urlObject.query`property is an `Object`, the literal string `?` is appended to `result` followed by the output of calling the
+     * `querystring` module's `stringify()` method passing the value of `urlObject.query`.
+     * * Otherwise, if `urlObject.search` is a string:
+     *    * If the value of `urlObject.search` _does not start_ with the ASCII question
+     *    mark (`?`) character, the literal string `?` is appended to `result`.
+     *    * The value of `urlObject.search` is appended to `result`.
+     * * Otherwise, if `urlObject.search` is not `undefined` and is not a string, an `Error` is thrown.
+     * * If the `urlObject.hash` property is a string:
+     *    * If the value of `urlObject.hash` _does not start_ with the ASCII hash (`#`)
+     *    character, the literal string `#` is appended to `result`.
+     *    * The value of `urlObject.hash` is appended to `result`.
+     * * Otherwise, if the `urlObject.hash` property is not `undefined` and is not a
+     * string, an `Error` is thrown.
+     * * `result` is returned.
+     * @since v0.1.25
+     * @legacy Use the WHATWG URL API instead.
+     * @param urlObject A URL object (as returned by `url.parse()` or constructed otherwise). If a string, it is converted to an object by passing it to `url.parse()`.
+     */
+    function format(urlObject: UrlObject | string): string;
+    /**
+     * The `url.resolve()` method resolves a target URL relative to a base URL in a
+     * manner similar to that of a web browser resolving an anchor tag.
+     *
+     * ```js
+     * import url from 'node:url';
+     * url.resolve('/one/two/three', 'four');         // '/one/two/four'
+     * url.resolve('http://example.com/', '/one');    // 'http://example.com/one'
+     * url.resolve('http://example.com/one', '/two'); // 'http://example.com/two'
+     * ```
+     *
+     * To achieve the same result using the WHATWG URL API:
+     *
+     * ```js
+     * function resolve(from, to) {
+     *   const resolvedUrl = new URL(to, new URL(from, 'resolve://'));
+     *   if (resolvedUrl.protocol === 'resolve:') {
+     *     // `from` is a relative URL.
+     *     const { pathname, search, hash } = resolvedUrl;
+     *     return pathname + search + hash;
+     *   }
+     *   return resolvedUrl.toString();
+     * }
+     *
+     * resolve('/one/two/three', 'four');         // '/one/two/four'
+     * resolve('http://example.com/', '/one');    // 'http://example.com/one'
+     * resolve('http://example.com/one', '/two'); // 'http://example.com/two'
+     * ```
+     * @since v0.1.25
+     * @legacy Use the WHATWG URL API instead.
+     * @param from The base URL to use if `to` is a relative URL.
+     * @param to The target URL to resolve.
+     */
+    function resolve(from: string, to: string): string;
+    /**
+     * Returns the [Punycode](https://tools.ietf.org/html/rfc5891#section-4.4) ASCII serialization of the `domain`. If `domain` is an
+     * invalid domain, the empty string is returned.
+     *
+     * It performs the inverse operation to {@link domainToUnicode}.
+     *
+     * ```js
+     * import url from 'node:url';
+     *
+     * console.log(url.domainToASCII('español.com'));
+     * // Prints xn--espaol-zwa.com
+     * console.log(url.domainToASCII('中文.com'));
+     * // Prints xn--fiq228c.com
+     * console.log(url.domainToASCII('xn--iñvalid.com'));
+     * // Prints an empty string
+     * ```
+     * @since v7.4.0, v6.13.0
+     */
+    function domainToASCII(domain: string): string;
+    /**
+     * Returns the Unicode serialization of the `domain`. If `domain` is an invalid
+     * domain, the empty string is returned.
+     *
+     * It performs the inverse operation to {@link domainToASCII}.
+     *
+     * ```js
+     * import url from 'node:url';
+     *
+     * console.log(url.domainToUnicode('xn--espaol-zwa.com'));
+     * // Prints español.com
+     * console.log(url.domainToUnicode('xn--fiq228c.com'));
+     * // Prints 中文.com
+     * console.log(url.domainToUnicode('xn--iñvalid.com'));
+     * // Prints an empty string
+     * ```
+     * @since v7.4.0, v6.13.0
+     */
+    function domainToUnicode(domain: string): string;
+    /**
+     * This function ensures the correct decodings of percent-encoded characters as
+     * well as ensuring a cross-platform valid absolute path string.
+     *
+     * ```js
+     * import { fileURLToPath } from 'node:url';
+     *
+     * const __filename = fileURLToPath(import.meta.url);
+     *
+     * new URL('file:///C:/path/').pathname;      // Incorrect: /C:/path/
+     * fileURLToPath('file:///C:/path/');         // Correct:   C:\path\ (Windows)
+     *
+     * new URL('file://nas/foo.txt').pathname;    // Incorrect: /foo.txt
+     * fileURLToPath('file://nas/foo.txt');       // Correct:   \\nas\foo.txt (Windows)
+     *
+     * new URL('file:///你好.txt').pathname;      // Incorrect: /%E4%BD%A0%E5%A5%BD.txt
+     * fileURLToPath('file:///你好.txt');         // Correct:   /你好.txt (POSIX)
+     *
+     * new URL('file:///hello world').pathname;   // Incorrect: /hello%20world
+     * fileURLToPath('file:///hello world');      // Correct:   /hello world (POSIX)
+     * ```
+     *
+     * **Security Considerations:**
+     *
+     * This function decodes percent-encoded characters, including encoded dot-segments
+     * (`%2e` as `.` and `%2e%2e` as `..`), and then normalizes the resulting path.
+     * This means that encoded directory traversal sequences (such as `%2e%2e`) are
+     * decoded and processed as actual path traversal, even though encoded slashes
+     * (`%2F`, `%5C`) are correctly rejected.
+     *
+     * **Applications must not rely on `fileURLToPath()` alone to prevent directory
+     * traversal attacks.** Always perform explicit path validation and security checks
+     * on the returned path value to ensure it remains within expected boundaries
+     * before using it for file system operations.
+     * @since v10.12.0
+     * @param url The file URL string or URL object to convert to a path.
+     * @return The fully-resolved platform-specific Node.js file path.
+     */
+    function fileURLToPath(url: string | URL, options?: FileUrlToPathOptions): string;
+    /**
+     * Like `url.fileURLToPath(...)` except that instead of returning a string
+     * representation of the path, a `Buffer` is returned. This conversion is
+     * helpful when the input URL contains percent-encoded segments that are
+     * not valid UTF-8 / Unicode sequences.
+     *
+     * **Security Considerations:**
+     *
+     * This function has the same security considerations as `url.fileURLToPath()`.
+     * It decodes percent-encoded characters, including encoded dot-segments
+     * (`%2e` as `.` and `%2e%2e` as `..`), and normalizes the path. **Applications
+     * must not rely on this function alone to prevent directory traversal attacks.**
+     * Always perform explicit path validation on the returned buffer value before
+     * using it for file system operations.
+     * @since v24.3.0
+     * @param url The file URL string or URL object to convert to a path.
+     * @returns The fully-resolved platform-specific Node.js file path
+     * as a `Buffer`.
+     */
+    function fileURLToPathBuffer(url: string | URL, options?: FileUrlToPathOptions): NonSharedBuffer;
+    /**
+     * This function ensures that `path` is resolved absolutely, and that the URL
+     * control characters are correctly encoded when converting into a File URL.
+     *
+     * ```js
+     * import { pathToFileURL } from 'node:url';
+     *
+     * new URL('/foo#1', 'file:');           // Incorrect: file:///foo#1
+     * pathToFileURL('/foo#1');              // Correct:   file:///foo%231 (POSIX)
+     *
+     * new URL('/some/path%.c', 'file:');    // Incorrect: file:///some/path%.c
+     * pathToFileURL('/some/path%.c');       // Correct:   file:///some/path%25.c (POSIX)
+     * ```
+     * @since v10.12.0
+     * @param path The path to convert to a File URL.
+     * @return The file URL object.
+     */
+    function pathToFileURL(path: string, options?: PathToFileUrlOptions): URL;
+    /**
+     * This utility function converts a URL object into an ordinary options object as
+     * expected by the `http.request()` and `https.request()` APIs.
+     *
+     * ```js
+     * import { urlToHttpOptions } from 'node:url';
+     * const myURL = new URL('https://a:b@測試?abc#foo');
+     *
+     * console.log(urlToHttpOptions(myURL));
+     * /*
+     * {
+     *   protocol: 'https:',
+     *   hostname: 'xn--g6w251d',
+     *   hash: '#foo',
+     *   search: '?abc',
+     *   pathname: '/',
+     *   path: '/?abc',
+     *   href: 'https://a:b@xn--g6w251d/?abc#foo',
+     *   auth: 'a:b'
+     * }
+     *
+     * ```
+     * @since v15.7.0, v14.18.0
+     * @param url The `WHATWG URL` object to convert to an options object.
+     * @return Options object
+     */
+    function urlToHttpOptions(url: URL): ClientRequestArgs;
+    interface URLFormatOptions {
+        /**
+         * `true` if the serialized URL string should include the username and password, `false` otherwise.
+         * @default true
+         */
+        auth?: boolean | undefined;
+        /**
+         * `true` if the serialized URL string should include the fragment, `false` otherwise.
+         * @default true
+         */
+        fragment?: boolean | undefined;
+        /**
+         * `true` if the serialized URL string should include the search query, `false` otherwise.
+         * @default true
+         */
+        search?: boolean | undefined;
+        /**
+         * `true` if Unicode characters appearing in the host component of the URL string should be encoded directly as opposed to
+         * being Punycode encoded.
+         * @default false
+         */
+        unicode?: boolean | undefined;
+    }
+    // #region web types
+    type URLPatternInput = string | URLPatternInit;
+    interface URLPatternComponentResult {
+        input: string;
+        groups: Record<string, string | undefined>;
+    }
+    interface URLPatternInit {
+        protocol?: string;
+        username?: string;
+        password?: string;
+        hostname?: string;
+        port?: string;
+        pathname?: string;
+        search?: string;
+        hash?: string;
+        baseURL?: string;
+    }
+    interface URLPatternOptions {
+        ignoreCase?: boolean;
+    }
+    interface URLPatternResult {
+        inputs: URLPatternInput[];
+        protocol: URLPatternComponentResult;
+        username: URLPatternComponentResult;
+        password: URLPatternComponentResult;
+        hostname: URLPatternComponentResult;
+        port: URLPatternComponentResult;
+        pathname: URLPatternComponentResult;
+        search: URLPatternComponentResult;
+        hash: URLPatternComponentResult;
+    }
+    interface URL {
+        hash: string;
+        host: string;
+        hostname: string;
+        href: string;
+        readonly origin: string;
+        password: string;
+        pathname: string;
+        port: string;
+        protocol: string;
+        search: string;
+        readonly searchParams: URLSearchParams;
+        username: string;
+        toJSON(): string;
+    }
+    var URL: {
+        prototype: URL;
+        new(url: string | URL, base?: string | URL): URL;
+        canParse(input: string | URL, base?: string | URL): boolean;
+        createObjectURL(blob: Blob): string;
+        parse(input: string | URL, base?: string | URL): URL | null;
+        revokeObjectURL(id: string): void;
+    };
+    interface URLPattern {
+        readonly hasRegExpGroups: boolean;
+        readonly hash: string;
+        readonly hostname: string;
+        readonly password: string;
+        readonly pathname: string;
+        readonly port: string;
+        readonly protocol: string;
+        readonly search: string;
+        readonly username: string;
+        exec(input?: URLPatternInput, baseURL?: string | URL): URLPatternResult | null;
+        test(input?: URLPatternInput, baseURL?: string | URL): boolean;
+    }
+    var URLPattern: {
+        prototype: URLPattern;
+        new(input: URLPatternInput, baseURL: string | URL, options?: URLPatternOptions): URLPattern;
+        new(input?: URLPatternInput, options?: URLPatternOptions): URLPattern;
+    };
+    interface URLSearchParams {
+        readonly size: number;
+        append(name: string, value: string): void;
+        delete(name: string, value?: string): void;
+        get(name: string): string | null;
+        getAll(name: string): string[];
+        has(name: string, value?: string): boolean;
+        set(name: string, value: string): void;
+        sort(): void;
+        forEach(callbackfn: (value: string, key: string, parent: URLSearchParams) => void, thisArg?: any): void;
+        [Symbol.iterator](): URLSearchParamsIterator<[string, string]>;
+        entries(): URLSearchParamsIterator<[string, string]>;
+        keys(): URLSearchParamsIterator<string>;
+        values(): URLSearchParamsIterator<string>;
+    }
+    var URLSearchParams: {
+        prototype: URLSearchParams;
+        new(init?: string[][] | Record<string, string> | string | URLSearchParams): URLSearchParams;
+    };
+    interface URLSearchParamsIterator<T> extends NodeJS.Iterator<T, NodeJS.BuiltinIteratorReturn, unknown> {
+        [Symbol.iterator](): URLSearchParamsIterator<T>;
+    }
+    // #endregion
+}
+declare module "url" {
+    export * from "node:url";
+}
diff --git a/mqtt-backend/node_modules/@types/node/util.d.ts b/mqtt-backend/node_modules/@types/node/util.d.ts
new file mode 100644
index 0000000..90f12aa
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/util.d.ts
@@ -0,0 +1,1677 @@
+declare module "node:util" {
+    export * as types from "node:util/types";
+    export type InspectStyle =
+        | "special"
+        | "number"
+        | "bigint"
+        | "boolean"
+        | "undefined"
+        | "null"
+        | "string"
+        | "symbol"
+        | "date"
+        | "name"
+        | "regexp"
+        | "module";
+    export interface InspectStyles extends Record<InspectStyle, InspectColor | ((value: string) => string)> {
+        regexp: {
+            (value: string): string;
+            colors: InspectColor[];
+        };
+    }
+    export type InspectColorModifier =
+        | "reset"
+        | "bold"
+        | "dim"
+        | "italic"
+        | "underline"
+        | "blink"
+        | "inverse"
+        | "hidden"
+        | "strikethrough"
+        | "doubleunderline";
+    export type InspectColorForeground =
+        | "black"
+        | "red"
+        | "green"
+        | "yellow"
+        | "blue"
+        | "magenta"
+        | "cyan"
+        | "white"
+        | "gray"
+        | "redBright"
+        | "greenBright"
+        | "yellowBright"
+        | "blueBright"
+        | "magentaBright"
+        | "cyanBright"
+        | "whiteBright";
+    export type InspectColorBackground = `bg${Capitalize<InspectColorForeground>}`;
+    export type InspectColor = InspectColorModifier | InspectColorForeground | InspectColorBackground;
+    export interface InspectColors extends Record<InspectColor, [number, number]> {}
+    export interface InspectOptions {
+        /**
+         * If `true`, object's non-enumerable symbols and properties are included in the formatted result.
+         * `WeakMap` and `WeakSet` entries are also included as well as user defined prototype properties (excluding method properties).
+         * @default false
+         */
+        showHidden?: boolean | undefined;
+        /**
+         * Specifies the number of times to recurse while formatting object.
+         * This is useful for inspecting large objects.
+         * To recurse up to the maximum call stack size pass `Infinity` or `null`.
+         * @default 2
+         */
+        depth?: number | null | undefined;
+        /**
+         * If `true`, the output is styled with ANSI color codes. Colors are customizable.
+         */
+        colors?: boolean | undefined;
+        /**
+         * If `false`, `[util.inspect.custom](depth, opts, inspect)` functions are not invoked.
+         * @default true
+         */
+        customInspect?: boolean | undefined;
+        /**
+         * If `true`, `Proxy` inspection includes the target and handler objects.
+         * @default false
+         */
+        showProxy?: boolean | undefined;
+        /**
+         * Specifies the maximum number of `Array`, `TypedArray`, `WeakMap`, and `WeakSet` elements
+         * to include when formatting. Set to `null` or `Infinity` to show all elements.
+         * Set to `0` or negative to show no elements.
+         * @default 100
+         */
+        maxArrayLength?: number | null | undefined;
+        /**
+         * Specifies the maximum number of characters to
+         * include when formatting. Set to `null` or `Infinity` to show all elements.
+         * Set to `0` or negative to show no characters.
+         * @default 10000
+         */
+        maxStringLength?: number | null | undefined;
+        /**
+         * The length at which input values are split across multiple lines.
+         * Set to `Infinity` to format the input as a single line
+         * (in combination with `compact` set to `true` or any number >= `1`).
+         * @default 80
+         */
+        breakLength?: number | undefined;
+        /**
+         * Setting this to `false` causes each object key
+         * to be displayed on a new line. It will also add new lines to text that is
+         * longer than `breakLength`. If set to a number, the most `n` inner elements
+         * are united on a single line as long as all properties fit into
+         * `breakLength`. Short array elements are also grouped together. Note that no
+         * text will be reduced below 16 characters, no matter the `breakLength` size.
+         * For more information, see the example below.
+         * @default true
+         */
+        compact?: boolean | number | undefined;
+        /**
+         * If set to `true` or a function, all properties of an object, and `Set` and `Map`
+         * entries are sorted in the resulting string.
+         * If set to `true` the default sort is used.
+         * If set to a function, it is used as a compare function.
+         */
+        sorted?: boolean | ((a: string, b: string) => number) | undefined;
+        /**
+         * If set to `true`, getters are going to be
+         * inspected as well. If set to `'get'` only getters without setter are going
+         * to be inspected. If set to `'set'` only getters having a corresponding
+         * setter are going to be inspected. This might cause side effects depending on
+         * the getter function.
+         * @default false
+         */
+        getters?: "get" | "set" | boolean | undefined;
+        /**
+         * If set to `true`, an underscore is used to separate every three digits in all bigints and numbers.
+         * @default false
+         */
+        numericSeparator?: boolean | undefined;
+    }
+    export interface InspectContext extends Required<InspectOptions> {
+        stylize(text: string, styleType: InspectStyle): string;
+    }
+    import _inspect = inspect;
+    export interface Inspectable {
+        [inspect.custom](depth: number, options: InspectContext, inspect: typeof _inspect): any;
+    }
+    // TODO: Remove these in a future major
+    /** @deprecated Use `InspectStyle` instead. */
+    export type Style = Exclude<InspectStyle, "name">;
+    /** @deprecated Use the `Inspectable` interface instead. */
+    export type CustomInspectFunction = (depth: number, options: InspectContext) => any;
+    /** @deprecated Use `InspectContext` instead. */
+    export interface InspectOptionsStylized extends InspectContext {}
+    /** @deprecated Use `InspectColorModifier` instead. */
+    export type Modifiers = InspectColorModifier;
+    /** @deprecated Use `InspectColorForeground` instead. */
+    export type ForegroundColors = InspectColorForeground;
+    /** @deprecated Use `InspectColorBackground` instead. */
+    export type BackgroundColors = InspectColorBackground;
+    export interface CallSiteObject {
+        /**
+         * Returns the name of the function associated with this call site.
+         */
+        functionName: string;
+        /**
+         * Returns the name of the resource that contains the script for the
+         * function for this call site.
+         */
+        scriptName: string;
+        /**
+         * Returns the unique id of the script, as in Chrome DevTools protocol
+         * [`Runtime.ScriptId`](https://chromedevtools.github.io/devtools-protocol/1-3/Runtime/#type-ScriptId).
+         * @since v22.14.0
+         */
+        scriptId: string;
+        /**
+         * Returns the number, 1-based, of the line for the associate function call.
+         */
+        lineNumber: number;
+        /**
+         * Returns the 1-based column offset on the line for the associated function call.
+         */
+        columnNumber: number;
+    }
+    export type DiffEntry = [operation: -1 | 0 | 1, value: string];
+    /**
+     * `util.diff()` compares two string or array values and returns an array of difference entries.
+     * It uses the Myers diff algorithm to compute minimal differences, which is the same algorithm
+     * used internally by assertion error messages.
+     *
+     * If the values are equal, an empty array is returned.
+     *
+     * ```js
+     * const { diff } = require('node:util');
+     *
+     * // Comparing strings
+     * const actualString = '12345678';
+     * const expectedString = '12!!5!7!';
+     * console.log(diff(actualString, expectedString));
+     * // [
+     * //   [0, '1'],
+     * //   [0, '2'],
+     * //   [1, '3'],
+     * //   [1, '4'],
+     * //   [-1, '!'],
+     * //   [-1, '!'],
+     * //   [0, '5'],
+     * //   [1, '6'],
+     * //   [-1, '!'],
+     * //   [0, '7'],
+     * //   [1, '8'],
+     * //   [-1, '!'],
+     * // ]
+     * // Comparing arrays
+     * const actualArray = ['1', '2', '3'];
+     * const expectedArray = ['1', '3', '4'];
+     * console.log(diff(actualArray, expectedArray));
+     * // [
+     * //   [0, '1'],
+     * //   [1, '2'],
+     * //   [0, '3'],
+     * //   [-1, '4'],
+     * // ]
+     * // Equal values return empty array
+     * console.log(diff('same', 'same'));
+     * // []
+     * ```
+     * @since v22.15.0
+     * @experimental
+     * @param actual The first value to compare
+     * @param expected The second value to compare
+     * @returns An array of difference entries. Each entry is an array with two elements:
+     * * Index 0: `number` Operation code: `-1` for delete, `0` for no-op/unchanged, `1` for insert
+     * * Index 1: `string` The value associated with the operation
+     */
+    export function diff(actual: string | readonly string[], expected: string | readonly string[]): DiffEntry[];
+    /**
+     * The `util.format()` method returns a formatted string using the first argument
+     * as a `printf`-like format string which can contain zero or more format
+     * specifiers. Each specifier is replaced with the converted value from the
+     * corresponding argument. Supported specifiers are:
+     *
+     * If a specifier does not have a corresponding argument, it is not replaced:
+     *
+     * ```js
+     * util.format('%s:%s', 'foo');
+     * // Returns: 'foo:%s'
+     * ```
+     *
+     * Values that are not part of the format string are formatted using `util.inspect()` if their type is not `string`.
+     *
+     * If there are more arguments passed to the `util.format()` method than the
+     * number of specifiers, the extra arguments are concatenated to the returned
+     * string, separated by spaces:
+     *
+     * ```js
+     * util.format('%s:%s', 'foo', 'bar', 'baz');
+     * // Returns: 'foo:bar baz'
+     * ```
+     *
+     * If the first argument does not contain a valid format specifier, `util.format()` returns a string that is the concatenation of all arguments separated by spaces:
+     *
+     * ```js
+     * util.format(1, 2, 3);
+     * // Returns: '1 2 3'
+     * ```
+     *
+     * If only one argument is passed to `util.format()`, it is returned as it is
+     * without any formatting:
+     *
+     * ```js
+     * util.format('%% %s');
+     * // Returns: '%% %s'
+     * ```
+     *
+     * `util.format()` is a synchronous method that is intended as a debugging tool.
+     * Some input values can have a significant performance overhead that can block the
+     * event loop. Use this function with care and never in a hot code path.
+     * @since v0.5.3
+     * @param format A `printf`-like format string.
+     */
+    export function format(format?: any, ...param: any[]): string;
+    /**
+     * This function is identical to {@link format}, except in that it takes
+     * an `inspectOptions` argument which specifies options that are passed along to {@link inspect}.
+     *
+     * ```js
+     * util.formatWithOptions({ colors: true }, 'See object %O', { foo: 42 });
+     * // Returns 'See object { foo: 42 }', where `42` is colored as a number
+     * // when printed to a terminal.
+     * ```
+     * @since v10.0.0
+     */
+    export function formatWithOptions(inspectOptions: InspectOptions, format?: any, ...param: any[]): string;
+    export interface GetCallSitesOptions {
+        /**
+         * Reconstruct the original location in the stacktrace from the source-map.
+         * Enabled by default with the flag `--enable-source-maps`.
+         */
+        sourceMap?: boolean | undefined;
+    }
+    /**
+     * Returns an array of call site objects containing the stack of
+     * the caller function.
+     *
+     * Unlike accessing an `error.stack`, the result returned from this API is not
+     * interfered with `Error.prepareStackTrace`.
+     *
+     * ```js
+     * import { getCallSites } from 'node:util';
+     *
+     * function exampleFunction() {
+     *   const callSites = getCallSites();
+     *
+     *   console.log('Call Sites:');
+     *   callSites.forEach((callSite, index) => {
+     *     console.log(`CallSite ${index + 1}:`);
+     *     console.log(`Function Name: ${callSite.functionName}`);
+     *     console.log(`Script Name: ${callSite.scriptName}`);
+     *     console.log(`Line Number: ${callSite.lineNumber}`);
+     *     console.log(`Column Number: ${callSite.columnNumber}`);
+     *   });
+     *   // CallSite 1:
+     *   // Function Name: exampleFunction
+     *   // Script Name: /home/example.js
+     *   // Line Number: 5
+     *   // Column Number: 26
+     *
+     *   // CallSite 2:
+     *   // Function Name: anotherFunction
+     *   // Script Name: /home/example.js
+     *   // Line Number: 22
+     *   // Column Number: 3
+     *
+     *   // ...
+     * }
+     *
+     * // A function to simulate another stack layer
+     * function anotherFunction() {
+     *   exampleFunction();
+     * }
+     *
+     * anotherFunction();
+     * ```
+     *
+     * It is possible to reconstruct the original locations by setting the option `sourceMap` to `true`.
+     * If the source map is not available, the original location will be the same as the current location.
+     * When the `--enable-source-maps` flag is enabled, for example when using `--experimental-transform-types`,
+     * `sourceMap` will be true by default.
+     *
+     * ```ts
+     * import { getCallSites } from 'node:util';
+     *
+     * interface Foo {
+     *   foo: string;
+     * }
+     *
+     * const callSites = getCallSites({ sourceMap: true });
+     *
+     * // With sourceMap:
+     * // Function Name: ''
+     * // Script Name: example.js
+     * // Line Number: 7
+     * // Column Number: 26
+     *
+     * // Without sourceMap:
+     * // Function Name: ''
+     * // Script Name: example.js
+     * // Line Number: 2
+     * // Column Number: 26
+     * ```
+     * @param frameCount Number of frames to capture as call site objects.
+     * **Default:** `10`. Allowable range is between 1 and 200.
+     * @return An array of call site objects
+     * @since v22.9.0
+     */
+    export function getCallSites(frameCount?: number, options?: GetCallSitesOptions): CallSiteObject[];
+    export function getCallSites(options: GetCallSitesOptions): CallSiteObject[];
+    /**
+     * Returns the string name for a numeric error code that comes from a Node.js API.
+     * The mapping between error codes and error names is platform-dependent.
+     * See `Common System Errors` for the names of common errors.
+     *
+     * ```js
+     * fs.access('file/that/does/not/exist', (err) => {
+     *   const name = util.getSystemErrorName(err.errno);
+     *   console.error(name);  // ENOENT
+     * });
+     * ```
+     * @since v9.7.0
+     */
+    export function getSystemErrorName(err: number): string;
+    /**
+     * Enable or disable printing a stack trace on `SIGINT`. The API is only available on the main thread.
+     * @since 24.6.0
+     */
+    export function setTraceSigInt(enable: boolean): void;
+    /**
+     * Returns a Map of all system error codes available from the Node.js API.
+     * The mapping between error codes and error names is platform-dependent.
+     * See `Common System Errors` for the names of common errors.
+     *
+     * ```js
+     * fs.access('file/that/does/not/exist', (err) => {
+     *   const errorMap = util.getSystemErrorMap();
+     *   const name = errorMap.get(err.errno);
+     *   console.error(name);  // ENOENT
+     * });
+     * ```
+     * @since v16.0.0, v14.17.0
+     */
+    export function getSystemErrorMap(): Map<number, [string, string]>;
+    /**
+     * Returns the string message for a numeric error code that comes from a Node.js
+     * API.
+     * The mapping between error codes and string messages is platform-dependent.
+     *
+     * ```js
+     * fs.access('file/that/does/not/exist', (err) => {
+     *   const message = util.getSystemErrorMessage(err.errno);
+     *   console.error(message);  // no such file or directory
+     * });
+     * ```
+     * @since v22.12.0
+     */
+    export function getSystemErrorMessage(err: number): string;
+    /**
+     * Returns the `string` after replacing any surrogate code points
+     * (or equivalently, any unpaired surrogate code units) with the
+     * Unicode "replacement character" U+FFFD.
+     * @since v16.8.0, v14.18.0
+     */
+    export function toUSVString(string: string): string;
+    /**
+     * Creates and returns an `AbortController` instance whose `AbortSignal` is marked
+     * as transferable and can be used with `structuredClone()` or `postMessage()`.
+     * @since v18.11.0
+     * @returns A transferable AbortController
+     */
+    export function transferableAbortController(): AbortController;
+    /**
+     * Marks the given `AbortSignal` as transferable so that it can be used with`structuredClone()` and `postMessage()`.
+     *
+     * ```js
+     * const signal = transferableAbortSignal(AbortSignal.timeout(100));
+     * const channel = new MessageChannel();
+     * channel.port2.postMessage(signal, [signal]);
+     * ```
+     * @since v18.11.0
+     * @param signal The AbortSignal
+     * @returns The same AbortSignal
+     */
+    export function transferableAbortSignal(signal: AbortSignal): AbortSignal;
+    /**
+     * Listens to abort event on the provided `signal` and returns a promise that resolves when the `signal` is aborted.
+     * If `resource` is provided, it weakly references the operation's associated object,
+     * so if `resource` is garbage collected before the `signal` aborts,
+     * then returned promise shall remain pending.
+     * This prevents memory leaks in long-running or non-cancelable operations.
+     *
+     * ```js
+     * import { aborted } from 'node:util';
+     *
+     * // Obtain an object with an abortable signal, like a custom resource or operation.
+     * const dependent = obtainSomethingAbortable();
+     *
+     * // Pass `dependent` as the resource, indicating the promise should only resolve
+     * // if `dependent` is still in memory when the signal is aborted.
+     * aborted(dependent.signal, dependent).then(() => {
+     *   // This code runs when `dependent` is aborted.
+     *   console.log('Dependent resource was aborted.');
+     * });
+     *
+     * // Simulate an event that triggers the abort.
+     * dependent.on('event', () => {
+     *   dependent.abort(); // This will cause the `aborted` promise to resolve.
+     * });
+     * ```
+     * @since v19.7.0
+     * @param resource Any non-null object tied to the abortable operation and held weakly.
+     * If `resource` is garbage collected before the `signal` aborts, the promise remains pending,
+     * allowing Node.js to stop tracking it.
+     * This helps prevent memory leaks in long-running or non-cancelable operations.
+     */
+    export function aborted(signal: AbortSignal, resource: any): Promise<void>;
+    /**
+     * The `util.inspect()` method returns a string representation of `object` that is
+     * intended for debugging. The output of `util.inspect` may change at any time
+     * and should not be depended upon programmatically. Additional `options` may be
+     * passed that alter the result.
+     * `util.inspect()` will use the constructor's name and/or `Symbol.toStringTag`
+     * property to make an identifiable tag for an inspected value.
+     *
+     * ```js
+     * class Foo {
+     *   get [Symbol.toStringTag]() {
+     *     return 'bar';
+     *   }
+     * }
+     *
+     * class Bar {}
+     *
+     * const baz = Object.create(null, { [Symbol.toStringTag]: { value: 'foo' } });
+     *
+     * util.inspect(new Foo()); // 'Foo [bar] {}'
+     * util.inspect(new Bar()); // 'Bar {}'
+     * util.inspect(baz);       // '[foo] {}'
+     * ```
+     *
+     * Circular references point to their anchor by using a reference index:
+     *
+     * ```js
+     * import { inspect } from 'node:util';
+     *
+     * const obj = {};
+     * obj.a = [obj];
+     * obj.b = {};
+     * obj.b.inner = obj.b;
+     * obj.b.obj = obj;
+     *
+     * console.log(inspect(obj));
+     * // <ref *1> {
+     * //   a: [ [Circular *1] ],
+     * //   b: <ref *2> { inner: [Circular *2], obj: [Circular *1] }
+     * // }
+     * ```
+     *
+     * The following example inspects all properties of the `util` object:
+     *
+     * ```js
+     * import util from 'node:util';
+     *
+     * console.log(util.inspect(util, { showHidden: true, depth: null }));
+     * ```
+     *
+     * The following example highlights the effect of the `compact` option:
+     *
+     * ```js
+     * import { inspect } from 'node:util';
+     *
+     * const o = {
+     *   a: [1, 2, [[
+     *     'Lorem ipsum dolor sit amet,\nconsectetur adipiscing elit, sed do ' +
+     *       'eiusmod \ntempor incididunt ut labore et dolore magna aliqua.',
+     *     'test',
+     *     'foo']], 4],
+     *   b: new Map([['za', 1], ['zb', 'test']]),
+     * };
+     * console.log(inspect(o, { compact: true, depth: 5, breakLength: 80 }));
+     *
+     * // { a:
+     * //   [ 1,
+     * //     2,
+     * //     [ [ 'Lorem ipsum dolor sit amet,\nconsectetur [...]', // A long line
+     * //           'test',
+     * //           'foo' ] ],
+     * //     4 ],
+     * //   b: Map(2) { 'za' => 1, 'zb' => 'test' } }
+     *
+     * // Setting `compact` to false or an integer creates more reader friendly output.
+     * console.log(inspect(o, { compact: false, depth: 5, breakLength: 80 }));
+     *
+     * // {
+     * //   a: [
+     * //     1,
+     * //     2,
+     * //     [
+     * //       [
+     * //         'Lorem ipsum dolor sit amet,\n' +
+     * //           'consectetur adipiscing elit, sed do eiusmod \n' +
+     * //           'tempor incididunt ut labore et dolore magna aliqua.',
+     * //         'test',
+     * //         'foo'
+     * //       ]
+     * //     ],
+     * //     4
+     * //   ],
+     * //   b: Map(2) {
+     * //     'za' => 1,
+     * //     'zb' => 'test'
+     * //   }
+     * // }
+     *
+     * // Setting `breakLength` to e.g. 150 will print the "Lorem ipsum" text in a
+     * // single line.
+     * ```
+     *
+     * The `showHidden` option allows `WeakMap` and `WeakSet` entries to be
+     * inspected. If there are more entries than `maxArrayLength`, there is no
+     * guarantee which entries are displayed. That means retrieving the same
+     * `WeakSet` entries twice may result in different output. Furthermore, entries
+     * with no remaining strong references may be garbage collected at any time.
+     *
+     * ```js
+     * import { inspect } from 'node:util';
+     *
+     * const obj = { a: 1 };
+     * const obj2 = { b: 2 };
+     * const weakSet = new WeakSet([obj, obj2]);
+     *
+     * console.log(inspect(weakSet, { showHidden: true }));
+     * // WeakSet { { a: 1 }, { b: 2 } }
+     * ```
+     *
+     * The `sorted` option ensures that an object's property insertion order does not
+     * impact the result of `util.inspect()`.
+     *
+     * ```js
+     * import { inspect } from 'node:util';
+     * import assert from 'node:assert';
+     *
+     * const o1 = {
+     *   b: [2, 3, 1],
+     *   a: '`a` comes before `b`',
+     *   c: new Set([2, 3, 1]),
+     * };
+     * console.log(inspect(o1, { sorted: true }));
+     * // { a: '`a` comes before `b`', b: [ 2, 3, 1 ], c: Set(3) { 1, 2, 3 } }
+     * console.log(inspect(o1, { sorted: (a, b) => b.localeCompare(a) }));
+     * // { c: Set(3) { 3, 2, 1 }, b: [ 2, 3, 1 ], a: '`a` comes before `b`' }
+     *
+     * const o2 = {
+     *   c: new Set([2, 1, 3]),
+     *   a: '`a` comes before `b`',
+     *   b: [2, 3, 1],
+     * };
+     * assert.strict.equal(
+     *   inspect(o1, { sorted: true }),
+     *   inspect(o2, { sorted: true }),
+     * );
+     * ```
+     *
+     * The `numericSeparator` option adds an underscore every three digits to all
+     * numbers.
+     *
+     * ```js
+     * import { inspect } from 'node:util';
+     *
+     * const thousand = 1000;
+     * const million = 1000000;
+     * const bigNumber = 123456789n;
+     * const bigDecimal = 1234.12345;
+     *
+     * console.log(inspect(thousand, { numericSeparator: true }));
+     * // 1_000
+     * console.log(inspect(million, { numericSeparator: true }));
+     * // 1_000_000
+     * console.log(inspect(bigNumber, { numericSeparator: true }));
+     * // 123_456_789n
+     * console.log(inspect(bigDecimal, { numericSeparator: true }));
+     * // 1_234.123_45
+     * ```
+     *
+     * `util.inspect()` is a synchronous method intended for debugging. Its maximum
+     * output length is approximately 128 MiB. Inputs that result in longer output will
+     * be truncated.
+     * @since v0.3.0
+     * @param object Any JavaScript primitive or `Object`.
+     * @return The representation of `object`.
+     */
+    export function inspect(object: any, showHidden?: boolean, depth?: number | null, color?: boolean): string;
+    export function inspect(object: any, options?: InspectOptions): string;
+    export namespace inspect {
+        const custom: unique symbol;
+        let colors: InspectColors;
+        let styles: InspectStyles;
+        let defaultOptions: InspectOptions;
+        let replDefaults: InspectOptions;
+    }
+    /**
+     * Alias for [`Array.isArray()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/isArray).
+     *
+     * Returns `true` if the given `object` is an `Array`. Otherwise, returns `false`.
+     *
+     * ```js
+     * import util from 'node:util';
+     *
+     * util.isArray([]);
+     * // Returns: true
+     * util.isArray(new Array());
+     * // Returns: true
+     * util.isArray({});
+     * // Returns: false
+     * ```
+     * @since v0.6.0
+     * @deprecated Since v4.0.0 - Use `isArray` instead.
+     */
+    export function isArray(object: unknown): object is unknown[];
+    /**
+     * Usage of `util.inherits()` is discouraged. Please use the ES6 `class` and
+     * `extends` keywords to get language level inheritance support. Also note
+     * that the two styles are [semantically incompatible](https://github.com/nodejs/node/issues/4179).
+     *
+     * Inherit the prototype methods from one
+     * [constructor](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/constructor) into another. The
+     * prototype of `constructor` will be set to a new object created from
+     * `superConstructor`.
+     *
+     * This mainly adds some input validation on top of
+     * `Object.setPrototypeOf(constructor.prototype, superConstructor.prototype)`.
+     * As an additional convenience, `superConstructor` will be accessible
+     * through the `constructor.super_` property.
+     *
+     * ```js
+     * const util = require('node:util');
+     * const EventEmitter = require('node:events');
+     *
+     * function MyStream() {
+     *   EventEmitter.call(this);
+     * }
+     *
+     * util.inherits(MyStream, EventEmitter);
+     *
+     * MyStream.prototype.write = function(data) {
+     *   this.emit('data', data);
+     * };
+     *
+     * const stream = new MyStream();
+     *
+     * console.log(stream instanceof EventEmitter); // true
+     * console.log(MyStream.super_ === EventEmitter); // true
+     *
+     * stream.on('data', (data) => {
+     *   console.log(`Received data: "${data}"`);
+     * });
+     * stream.write('It works!'); // Received data: "It works!"
+     * ```
+     *
+     * ES6 example using `class` and `extends`:
+     *
+     * ```js
+     * import EventEmitter from 'node:events';
+     *
+     * class MyStream extends EventEmitter {
+     *   write(data) {
+     *     this.emit('data', data);
+     *   }
+     * }
+     *
+     * const stream = new MyStream();
+     *
+     * stream.on('data', (data) => {
+     *   console.log(`Received data: "${data}"`);
+     * });
+     * stream.write('With ES6');
+     * ```
+     * @since v0.3.0
+     * @legacy Use ES2015 class syntax and `extends` keyword instead.
+     */
+    export function inherits(constructor: unknown, superConstructor: unknown): void;
+    /**
+     * The `util.convertProcessSignalToExitCode()` method converts a signal name to its
+     * corresponding POSIX exit code. Following the POSIX standard, the exit code
+     * for a process terminated by a signal is calculated as `128 + signal number`.
+     *
+     * If `signal` is not a valid signal name, then an error will be thrown. See
+     * [`signal(7)`](https://man7.org/linux/man-pages/man7/signal.7.html) for a list of valid signals.
+     *
+     * ```js
+     * import { convertProcessSignalToExitCode } from 'node:util';
+     *
+     * console.log(convertProcessSignalToExitCode('SIGTERM')); // 143 (128 + 15)
+     * console.log(convertProcessSignalToExitCode('SIGKILL')); // 137 (128 + 9)
+     * ```
+     *
+     * This is particularly useful when working with processes to determine
+     * the exit code based on the signal that terminated the process.
+     * @since v25.4.0
+     * @param signal A signal name (e.g. `'SIGTERM'`)
+     * @returns The exit code corresponding to `signal`
+     */
+    export function convertProcessSignalToExitCode(signal: NodeJS.Signals): number;
+    export type DebugLoggerFunction = (msg: string, ...param: unknown[]) => void;
+    export interface DebugLogger extends DebugLoggerFunction {
+        /**
+         * The `util.debuglog().enabled` getter is used to create a test that can be used
+         * in conditionals based on the existence of the `NODE_DEBUG` environment variable.
+         * If the `section` name appears within the value of that environment variable,
+         * then the returned value will be `true`. If not, then the returned value will be
+         * `false`.
+         *
+         * ```js
+         * import { debuglog } from 'node:util';
+         * const enabled = debuglog('foo').enabled;
+         * if (enabled) {
+         *   console.log('hello from foo [%d]', 123);
+         * }
+         * ```
+         *
+         * If this program is run with `NODE_DEBUG=foo` in the environment, then it will
+         * output something like:
+         *
+         * ```console
+         * hello from foo [123]
+         * ```
+         */
+        enabled: boolean;
+    }
+    /**
+     * The `util.debuglog()` method is used to create a function that conditionally
+     * writes debug messages to `stderr` based on the existence of the `NODE_DEBUG`
+     * environment variable. If the `section` name appears within the value of that
+     * environment variable, then the returned function operates similar to
+     * `console.error()`. If not, then the returned function is a no-op.
+     *
+     * ```js
+     * import { debuglog } from 'node:util';
+     * const log = debuglog('foo');
+     *
+     * log('hello from foo [%d]', 123);
+     * ```
+     *
+     * If this program is run with `NODE_DEBUG=foo` in the environment, then
+     * it will output something like:
+     *
+     * ```console
+     * FOO 3245: hello from foo [123]
+     * ```
+     *
+     * where `3245` is the process id. If it is not run with that
+     * environment variable set, then it will not print anything.
+     *
+     * The `section` supports wildcard also:
+     *
+     * ```js
+     * import { debuglog } from 'node:util';
+     * const log = debuglog('foo-bar');
+     *
+     * log('hi there, it\'s foo-bar [%d]', 2333);
+     * ```
+     *
+     * if it is run with `NODE_DEBUG=foo*` in the environment, then it will output
+     * something like:
+     *
+     * ```console
+     * FOO-BAR 3257: hi there, it's foo-bar [2333]
+     * ```
+     *
+     * Multiple comma-separated `section` names may be specified in the `NODE_DEBUG`
+     * environment variable: `NODE_DEBUG=fs,net,tls`.
+     *
+     * The optional `callback` argument can be used to replace the logging function
+     * with a different function that doesn't have any initialization or
+     * unnecessary wrapping.
+     *
+     * ```js
+     * import { debuglog } from 'node:util';
+     * let log = debuglog('internals', (debug) => {
+     *   // Replace with a logging function that optimizes out
+     *   // testing if the section is enabled
+     *   log = debug;
+     * });
+     * ```
+     * @since v0.11.3
+     * @param section A string identifying the portion of the application for which the `debuglog` function is being created.
+     * @param callback A callback invoked the first time the logging function is called with a function argument that is a more optimized logging function.
+     * @return The logging function
+     */
+    export function debuglog(section: string, callback?: (fn: DebugLoggerFunction) => void): DebugLogger;
+    export { debuglog as debug };
+    export interface DeprecateOptions {
+        /**
+         * When false do not change the prototype of object
+         * while emitting the deprecation warning.
+         * @since v25.2.0
+         * @default true
+         */
+        modifyPrototype?: boolean | undefined;
+    }
+    /**
+     * The `util.deprecate()` method wraps `fn` (which may be a function or class) in
+     * such a way that it is marked as deprecated.
+     *
+     * ```js
+     * import { deprecate } from 'node:util';
+     *
+     * export const obsoleteFunction = deprecate(() => {
+     *   // Do something here.
+     * }, 'obsoleteFunction() is deprecated. Use newShinyFunction() instead.');
+     * ```
+     *
+     * When called, `util.deprecate()` will return a function that will emit a
+     * `DeprecationWarning` using the `'warning'` event. The warning will
+     * be emitted and printed to `stderr` the first time the returned function is
+     * called. After the warning is emitted, the wrapped function is called without
+     * emitting a warning.
+     *
+     * If the same optional `code` is supplied in multiple calls to `util.deprecate()`,
+     * the warning will be emitted only once for that `code`.
+     *
+     * ```js
+     * import { deprecate } from 'node:util';
+     *
+     * const fn1 = deprecate(
+     *   () => 'a value',
+     *   'deprecation message',
+     *   'DEP0001',
+     * );
+     * const fn2 = deprecate(
+     *   () => 'a  different value',
+     *   'other dep message',
+     *   'DEP0001',
+     * );
+     * fn1(); // Emits a deprecation warning with code DEP0001
+     * fn2(); // Does not emit a deprecation warning because it has the same code
+     * ```
+     *
+     * If either the `--no-deprecation` or `--no-warnings` command-line flags are
+     * used, or if the `process.noDeprecation` property is set to `true` _prior_ to
+     * the first deprecation warning, the `util.deprecate()` method does nothing.
+     *
+     * If the `--trace-deprecation` or `--trace-warnings` command-line flags are set,
+     * or the `process.traceDeprecation` property is set to `true`, a warning and a
+     * stack trace are printed to `stderr` the first time the deprecated function is
+     * called.
+     *
+     * If the `--throw-deprecation` command-line flag is set, or the
+     * `process.throwDeprecation` property is set to `true`, then an exception will be
+     * thrown when the deprecated function is called.
+     *
+     * The `--throw-deprecation` command-line flag and `process.throwDeprecation`
+     * property take precedence over `--trace-deprecation` and
+     * `process.traceDeprecation`.
+     * @since v0.8.0
+     * @param fn The function that is being deprecated.
+     * @param msg A warning message to display when the deprecated function is invoked.
+     * @param code A deprecation code. See the `list of deprecated APIs` for a list of codes.
+     * @return The deprecated function wrapped to emit a warning.
+     */
+    export function deprecate<T extends Function>(fn: T, msg: string, code?: string, options?: DeprecateOptions): T;
+    export interface IsDeepStrictEqualOptions {
+        /**
+         * If `true`, prototype and constructor
+         * comparison is skipped during deep strict equality check.
+         * @since v24.9.0
+         * @default false
+         */
+        skipPrototype?: boolean | undefined;
+    }
+    /**
+     * Returns `true` if there is deep strict equality between `val1` and `val2`.
+     * Otherwise, returns `false`.
+     *
+     * See `assert.deepStrictEqual()` for more information about deep strict
+     * equality.
+     * @since v9.0.0
+     */
+    export function isDeepStrictEqual(val1: unknown, val2: unknown, options?: IsDeepStrictEqualOptions): boolean;
+    /**
+     * Returns `str` with any ANSI escape codes removed.
+     *
+     * ```js
+     * console.log(util.stripVTControlCharacters('\u001B[4mvalue\u001B[0m'));
+     * // Prints "value"
+     * ```
+     * @since v16.11.0
+     */
+    export function stripVTControlCharacters(str: string): string;
+    /**
+     * Takes an `async` function (or a function that returns a `Promise`) and returns a
+     * function following the error-first callback style, i.e. taking
+     * an `(err, value) => ...` callback as the last argument. In the callback, the
+     * first argument will be the rejection reason (or `null` if the `Promise`
+     * resolved), and the second argument will be the resolved value.
+     *
+     * ```js
+     * import { callbackify } from 'node:util';
+     *
+     * async function fn() {
+     *   return 'hello world';
+     * }
+     * const callbackFunction = callbackify(fn);
+     *
+     * callbackFunction((err, ret) => {
+     *   if (err) throw err;
+     *   console.log(ret);
+     * });
+     * ```
+     *
+     * Will print:
+     *
+     * ```text
+     * hello world
+     * ```
+     *
+     * The callback is executed asynchronously, and will have a limited stack trace.
+     * If the callback throws, the process will emit an `'uncaughtException'`
+     * event, and if not handled will exit.
+     *
+     * Since `null` has a special meaning as the first argument to a callback, if a
+     * wrapped function rejects a `Promise` with a falsy value as a reason, the value
+     * is wrapped in an `Error` with the original value stored in a field named
+     * `reason`.
+     *
+     * ```js
+     * function fn() {
+     *   return Promise.reject(null);
+     * }
+     * const callbackFunction = util.callbackify(fn);
+     *
+     * callbackFunction((err, ret) => {
+     *   // When the Promise was rejected with `null` it is wrapped with an Error and
+     *   // the original value is stored in `reason`.
+     *   err && Object.hasOwn(err, 'reason') && err.reason === null;  // true
+     * });
+     * ```
+     * @since v8.2.0
+     * @param fn An `async` function
+     * @return a callback style function
+     */
+    export function callbackify(fn: () => Promise<void>): (callback: (err: NodeJS.ErrnoException) => void) => void;
+    export function callbackify<TResult>(
+        fn: () => Promise<TResult>,
+    ): (callback: (err: NodeJS.ErrnoException, result: TResult) => void) => void;
+    export function callbackify<T1>(
+        fn: (arg1: T1) => Promise<void>,
+    ): (arg1: T1, callback: (err: NodeJS.ErrnoException) => void) => void;
+    export function callbackify<T1, TResult>(
+        fn: (arg1: T1) => Promise<TResult>,
+    ): (arg1: T1, callback: (err: NodeJS.ErrnoException, result: TResult) => void) => void;
+    export function callbackify<T1, T2>(
+        fn: (arg1: T1, arg2: T2) => Promise<void>,
+    ): (arg1: T1, arg2: T2, callback: (err: NodeJS.ErrnoException) => void) => void;
+    export function callbackify<T1, T2, TResult>(
+        fn: (arg1: T1, arg2: T2) => Promise<TResult>,
+    ): (arg1: T1, arg2: T2, callback: (err: NodeJS.ErrnoException | null, result: TResult) => void) => void;
+    export function callbackify<T1, T2, T3>(
+        fn: (arg1: T1, arg2: T2, arg3: T3) => Promise<void>,
+    ): (arg1: T1, arg2: T2, arg3: T3, callback: (err: NodeJS.ErrnoException) => void) => void;
+    export function callbackify<T1, T2, T3, TResult>(
+        fn: (arg1: T1, arg2: T2, arg3: T3) => Promise<TResult>,
+    ): (arg1: T1, arg2: T2, arg3: T3, callback: (err: NodeJS.ErrnoException | null, result: TResult) => void) => void;
+    export function callbackify<T1, T2, T3, T4>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise<void>,
+    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, callback: (err: NodeJS.ErrnoException) => void) => void;
+    export function callbackify<T1, T2, T3, T4, TResult>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise<TResult>,
+    ): (
+        arg1: T1,
+        arg2: T2,
+        arg3: T3,
+        arg4: T4,
+        callback: (err: NodeJS.ErrnoException | null, result: TResult) => void,
+    ) => void;
+    export function callbackify<T1, T2, T3, T4, T5>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise<void>,
+    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, callback: (err: NodeJS.ErrnoException) => void) => void;
+    export function callbackify<T1, T2, T3, T4, T5, TResult>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise<TResult>,
+    ): (
+        arg1: T1,
+        arg2: T2,
+        arg3: T3,
+        arg4: T4,
+        arg5: T5,
+        callback: (err: NodeJS.ErrnoException | null, result: TResult) => void,
+    ) => void;
+    export function callbackify<T1, T2, T3, T4, T5, T6>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, arg6: T6) => Promise<void>,
+    ): (
+        arg1: T1,
+        arg2: T2,
+        arg3: T3,
+        arg4: T4,
+        arg5: T5,
+        arg6: T6,
+        callback: (err: NodeJS.ErrnoException) => void,
+    ) => void;
+    export function callbackify<T1, T2, T3, T4, T5, T6, TResult>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, arg6: T6) => Promise<TResult>,
+    ): (
+        arg1: T1,
+        arg2: T2,
+        arg3: T3,
+        arg4: T4,
+        arg5: T5,
+        arg6: T6,
+        callback: (err: NodeJS.ErrnoException | null, result: TResult) => void,
+    ) => void;
+    export interface CustomPromisifyLegacy<TCustom extends Function> extends Function {
+        __promisify__: TCustom;
+    }
+    export interface CustomPromisifySymbol<TCustom extends Function> extends Function {
+        [promisify.custom]: TCustom;
+    }
+    export type CustomPromisify<TCustom extends Function> =
+        | CustomPromisifySymbol<TCustom>
+        | CustomPromisifyLegacy<TCustom>;
+    /**
+     * Takes a function following the common error-first callback style, i.e. taking
+     * an `(err, value) => ...` callback as the last argument, and returns a version
+     * that returns promises.
+     *
+     * ```js
+     * import { promisify } from 'node:util';
+     * import { stat } from 'node:fs';
+     *
+     * const promisifiedStat = promisify(stat);
+     * promisifiedStat('.').then((stats) => {
+     *   // Do something with `stats`
+     * }).catch((error) => {
+     *   // Handle the error.
+     * });
+     * ```
+     *
+     * Or, equivalently using `async function`s:
+     *
+     * ```js
+     * import { promisify } from 'node:util';
+     * import { stat } from 'node:fs';
+     *
+     * const promisifiedStat = promisify(stat);
+     *
+     * async function callStat() {
+     *   const stats = await promisifiedStat('.');
+     *   console.log(`This directory is owned by ${stats.uid}`);
+     * }
+     *
+     * callStat();
+     * ```
+     *
+     * If there is an `original[util.promisify.custom]` property present, `promisify`
+     * will return its value, see [Custom promisified functions](https://nodejs.org/docs/latest-v25.x/api/util.html#custom-promisified-functions).
+     *
+     * `promisify()` assumes that `original` is a function taking a callback as its
+     * final argument in all cases. If `original` is not a function, `promisify()`
+     * will throw an error. If `original` is a function but its last argument is not
+     * an error-first callback, it will still be passed an error-first
+     * callback as its last argument.
+     *
+     * Using `promisify()` on class methods or other methods that use `this` may not
+     * work as expected unless handled specially:
+     *
+     * ```js
+     * import { promisify } from 'node:util';
+     *
+     * class Foo {
+     *   constructor() {
+     *     this.a = 42;
+     *   }
+     *
+     *   bar(callback) {
+     *     callback(null, this.a);
+     *   }
+     * }
+     *
+     * const foo = new Foo();
+     *
+     * const naiveBar = promisify(foo.bar);
+     * // TypeError: Cannot read properties of undefined (reading 'a')
+     * // naiveBar().then(a => console.log(a));
+     *
+     * naiveBar.call(foo).then((a) => console.log(a)); // '42'
+     *
+     * const bindBar = naiveBar.bind(foo);
+     * bindBar().then((a) => console.log(a)); // '42'
+     * ```
+     * @since v8.0.0
+     */
+    export function promisify<TCustom extends Function>(fn: CustomPromisify<TCustom>): TCustom;
+    export function promisify<TResult>(
+        fn: (callback: (err: any, result: TResult) => void) => void,
+    ): () => Promise<TResult>;
+    export function promisify(fn: (callback: (err?: any) => void) => void): () => Promise<void>;
+    export function promisify<T1, TResult>(
+        fn: (arg1: T1, callback: (err: any, result: TResult) => void) => void,
+    ): (arg1: T1) => Promise<TResult>;
+    export function promisify<T1>(fn: (arg1: T1, callback: (err?: any) => void) => void): (arg1: T1) => Promise<void>;
+    export function promisify<T1, T2, TResult>(
+        fn: (arg1: T1, arg2: T2, callback: (err: any, result: TResult) => void) => void,
+    ): (arg1: T1, arg2: T2) => Promise<TResult>;
+    export function promisify<T1, T2>(
+        fn: (arg1: T1, arg2: T2, callback: (err?: any) => void) => void,
+    ): (arg1: T1, arg2: T2) => Promise<void>;
+    export function promisify<T1, T2, T3, TResult>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, callback: (err: any, result: TResult) => void) => void,
+    ): (arg1: T1, arg2: T2, arg3: T3) => Promise<TResult>;
+    export function promisify<T1, T2, T3>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, callback: (err?: any) => void) => void,
+    ): (arg1: T1, arg2: T2, arg3: T3) => Promise<void>;
+    export function promisify<T1, T2, T3, T4, TResult>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, callback: (err: any, result: TResult) => void) => void,
+    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise<TResult>;
+    export function promisify<T1, T2, T3, T4>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, callback: (err?: any) => void) => void,
+    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4) => Promise<void>;
+    export function promisify<T1, T2, T3, T4, T5, TResult>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, callback: (err: any, result: TResult) => void) => void,
+    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise<TResult>;
+    export function promisify<T1, T2, T3, T4, T5>(
+        fn: (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5, callback: (err?: any) => void) => void,
+    ): (arg1: T1, arg2: T2, arg3: T3, arg4: T4, arg5: T5) => Promise<void>;
+    export function promisify(fn: Function): Function;
+    export namespace promisify {
+        /**
+         * That can be used to declare custom promisified variants of functions.
+         */
+        const custom: unique symbol;
+    }
+    /**
+     * Stability: 1.1 - Active development
+     * Given an example `.env` file:
+     *
+     * ```js
+     * import { parseEnv } from 'node:util';
+     *
+     * parseEnv('HELLO=world\nHELLO=oh my\n');
+     * // Returns: { HELLO: 'oh my' }
+     * ```
+     * @param content The raw contents of a `.env` file.
+     * @since v20.12.0
+     */
+    export function parseEnv(content: string): NodeJS.Dict<string>;
+    export interface StyleTextOptions {
+        /**
+         * When true, `stream` is checked to see if it can handle colors.
+         * @default true
+         */
+        validateStream?: boolean | undefined;
+        /**
+         * A stream that will be validated if it can be colored.
+         * @default process.stdout
+         */
+        stream?: NodeJS.WritableStream | undefined;
+    }
+    /**
+     * This function returns a formatted text considering the `format` passed
+     * for printing in a terminal. It is aware of the terminal's capabilities
+     * and acts according to the configuration set via `NO_COLOR`,
+     * `NODE_DISABLE_COLORS` and `FORCE_COLOR` environment variables.
+     *
+     * ```js
+     * import { styleText } from 'node:util';
+     * import { stderr } from 'node:process';
+     *
+     * const successMessage = styleText('green', 'Success!');
+     * console.log(successMessage);
+     *
+     * const errorMessage = styleText(
+     *   'red',
+     *   'Error! Error!',
+     *   // Validate if process.stderr has TTY
+     *   { stream: stderr },
+     * );
+     * console.error(errorMessage);
+     * ```
+     *
+     * `util.inspect.colors` also provides text formats such as `italic`, and
+     * `underline` and you can combine both:
+     *
+     * ```js
+     * console.log(
+     *   util.styleText(['underline', 'italic'], 'My italic underlined message'),
+     * );
+     * ```
+     *
+     * When passing an array of formats, the order of the format applied
+     * is left to right so the following style might overwrite the previous one.
+     *
+     * ```js
+     * console.log(
+     *   util.styleText(['red', 'green'], 'text'), // green
+     * );
+     * ```
+     *
+     * The special format value `none` applies no additional styling to the text.
+     *
+     * The full list of formats can be found in [modifiers](https://nodejs.org/docs/latest-v25.x/api/util.html#modifiers).
+     * @param format A text format or an Array of text formats defined in `util.inspect.colors`.
+     * @param text The text to to be formatted.
+     * @since v20.12.0
+     */
+    export function styleText(
+        format: InspectColor | readonly InspectColor[],
+        text: string,
+        options?: StyleTextOptions,
+    ): string;
+    /** @deprecated This alias will be removed in a future version. Use the canonical `TextEncoderEncodeIntoResult` instead. */
+    // TODO: remove in future major
+    export interface EncodeIntoResult extends TextEncoderEncodeIntoResult {}
+    //// parseArgs
+    /**
+     * Provides a higher level API for command-line argument parsing than interacting
+     * with `process.argv` directly. Takes a specification for the expected arguments
+     * and returns a structured object with the parsed options and positionals.
+     *
+     * ```js
+     * import { parseArgs } from 'node:util';
+     * const args = ['-f', '--bar', 'b'];
+     * const options = {
+     *   foo: {
+     *     type: 'boolean',
+     *     short: 'f',
+     *   },
+     *   bar: {
+     *     type: 'string',
+     *   },
+     * };
+     * const {
+     *   values,
+     *   positionals,
+     * } = parseArgs({ args, options });
+     * console.log(values, positionals);
+     * // Prints: [Object: null prototype] { foo: true, bar: 'b' } []
+     * ```
+     * @since v18.3.0, v16.17.0
+     * @param config Used to provide arguments for parsing and to configure the parser. `config` supports the following properties:
+     * @return The parsed command line arguments:
+     */
+    export function parseArgs<T extends ParseArgsConfig>(config?: T): ParsedResults<T>;
+    /**
+     * Type of argument used in {@link parseArgs}.
+     */
+    export type ParseArgsOptionsType = "boolean" | "string";
+    export interface ParseArgsOptionDescriptor {
+        /**
+         * Type of argument.
+         */
+        type: ParseArgsOptionsType;
+        /**
+         * Whether this option can be provided multiple times.
+         * If `true`, all values will be collected in an array.
+         * If `false`, values for the option are last-wins.
+         * @default false.
+         */
+        multiple?: boolean | undefined;
+        /**
+         * A single character alias for the option.
+         */
+        short?: string | undefined;
+        /**
+         * The value to assign to
+         * the option if it does not appear in the arguments to be parsed. The value
+         * must match the type specified by the `type` property. If `multiple` is
+         * `true`, it must be an array. No default value is applied when the option
+         * does appear in the arguments to be parsed, even if the provided value
+         * is falsy.
+         * @since v18.11.0
+         */
+        default?: string | boolean | string[] | boolean[] | undefined;
+    }
+    export interface ParseArgsOptionsConfig {
+        [longOption: string]: ParseArgsOptionDescriptor;
+    }
+    export interface ParseArgsConfig {
+        /**
+         * Array of argument strings.
+         */
+        args?: readonly string[] | undefined;
+        /**
+         * Used to describe arguments known to the parser.
+         */
+        options?: ParseArgsOptionsConfig | undefined;
+        /**
+         * Should an error be thrown when unknown arguments are encountered,
+         * or when arguments are passed that do not match the `type` configured in `options`.
+         * @default true
+         */
+        strict?: boolean | undefined;
+        /**
+         * Whether this command accepts positional arguments.
+         */
+        allowPositionals?: boolean | undefined;
+        /**
+         * If `true`, allows explicitly setting boolean options to `false` by prefixing the option name with `--no-`.
+         * @default false
+         * @since v22.4.0
+         */
+        allowNegative?: boolean | undefined;
+        /**
+         * Return the parsed tokens. This is useful for extending the built-in behavior,
+         * from adding additional checks through to reprocessing the tokens in different ways.
+         * @default false
+         */
+        tokens?: boolean | undefined;
+    }
+    /*
+    IfDefaultsTrue and IfDefaultsFalse are helpers to handle default values for missing boolean properties.
+    TypeScript does not have exact types for objects: https://github.com/microsoft/TypeScript/issues/12936
+    This means it is impossible to distinguish between "field X is definitely not present" and "field X may or may not be present".
+    But we expect users to generally provide their config inline or `as const`, which means TS will always know whether a given field is present.
+    So this helper treats "not definitely present" (i.e., not `extends boolean`) as being "definitely not present", i.e. it should have its default value.
+    This is technically incorrect but is a much nicer UX for the common case.
+    The IfDefaultsTrue version is for things which default to true; the IfDefaultsFalse version is for things which default to false.
+    */
+    type IfDefaultsTrue<T, IfTrue, IfFalse> = T extends true ? IfTrue
+        : T extends false ? IfFalse
+        : IfTrue;
+    // we put the `extends false` condition first here because `undefined` compares like `any` when `strictNullChecks: false`
+    type IfDefaultsFalse<T, IfTrue, IfFalse> = T extends false ? IfFalse
+        : T extends true ? IfTrue
+        : IfFalse;
+    type ExtractOptionValue<T extends ParseArgsConfig, O extends ParseArgsOptionDescriptor> = IfDefaultsTrue<
+        T["strict"],
+        O["type"] extends "string" ? string : O["type"] extends "boolean" ? boolean : string | boolean,
+        string | boolean
+    >;
+    type ApplyOptionalModifiers<O extends ParseArgsOptionsConfig, V extends Record<keyof O, unknown>> = (
+        & { -readonly [LongOption in keyof O]?: V[LongOption] }
+        & { [LongOption in keyof O as O[LongOption]["default"] extends {} ? LongOption : never]: V[LongOption] }
+    ) extends infer P ? { [K in keyof P]: P[K] } : never; // resolve intersection to object
+    type ParsedValues<T extends ParseArgsConfig> =
+        & IfDefaultsTrue<T["strict"], unknown, { [longOption: string]: undefined | string | boolean }>
+        & (T["options"] extends ParseArgsOptionsConfig ? ApplyOptionalModifiers<
+                T["options"],
+                {
+                    [LongOption in keyof T["options"]]: IfDefaultsFalse<
+                        T["options"][LongOption]["multiple"],
+                        Array<ExtractOptionValue<T, T["options"][LongOption]>>,
+                        ExtractOptionValue<T, T["options"][LongOption]>
+                    >;
+                }
+            >
+            : {});
+    type ParsedPositionals<T extends ParseArgsConfig> = IfDefaultsTrue<
+        T["strict"],
+        IfDefaultsFalse<T["allowPositionals"], string[], []>,
+        IfDefaultsTrue<T["allowPositionals"], string[], []>
+    >;
+    type PreciseTokenForOptions<
+        K extends string,
+        O extends ParseArgsOptionDescriptor,
+    > = O["type"] extends "string" ? {
+            kind: "option";
+            index: number;
+            name: K;
+            rawName: string;
+            value: string;
+            inlineValue: boolean;
+        }
+        : O["type"] extends "boolean" ? {
+                kind: "option";
+                index: number;
+                name: K;
+                rawName: string;
+                value: undefined;
+                inlineValue: undefined;
+            }
+        : OptionToken & { name: K };
+    type TokenForOptions<
+        T extends ParseArgsConfig,
+        K extends keyof T["options"] = keyof T["options"],
+    > = K extends unknown
+        ? T["options"] extends ParseArgsOptionsConfig ? PreciseTokenForOptions<K & string, T["options"][K]>
+        : OptionToken
+        : never;
+    type ParsedOptionToken<T extends ParseArgsConfig> = IfDefaultsTrue<T["strict"], TokenForOptions<T>, OptionToken>;
+    type ParsedPositionalToken<T extends ParseArgsConfig> = IfDefaultsTrue<
+        T["strict"],
+        IfDefaultsFalse<T["allowPositionals"], { kind: "positional"; index: number; value: string }, never>,
+        IfDefaultsTrue<T["allowPositionals"], { kind: "positional"; index: number; value: string }, never>
+    >;
+    type ParsedTokens<T extends ParseArgsConfig> = Array<
+        ParsedOptionToken<T> | ParsedPositionalToken<T> | { kind: "option-terminator"; index: number }
+    >;
+    type PreciseParsedResults<T extends ParseArgsConfig> = IfDefaultsFalse<
+        T["tokens"],
+        {
+            values: ParsedValues<T>;
+            positionals: ParsedPositionals<T>;
+            tokens: ParsedTokens<T>;
+        },
+        {
+            values: ParsedValues<T>;
+            positionals: ParsedPositionals<T>;
+        }
+    >;
+    type OptionToken =
+        | { kind: "option"; index: number; name: string; rawName: string; value: string; inlineValue: boolean }
+        | {
+            kind: "option";
+            index: number;
+            name: string;
+            rawName: string;
+            value: undefined;
+            inlineValue: undefined;
+        };
+    type Token =
+        | OptionToken
+        | { kind: "positional"; index: number; value: string }
+        | { kind: "option-terminator"; index: number };
+    // If ParseArgsConfig extends T, then the user passed config constructed elsewhere.
+    // So we can't rely on the `"not definitely present" implies "definitely not present"` assumption mentioned above.
+    type ParsedResults<T extends ParseArgsConfig> = ParseArgsConfig extends T ? {
+            values: {
+                [longOption: string]: undefined | string | boolean | Array<string | boolean>;
+            };
+            positionals: string[];
+            tokens?: Token[];
+        }
+        : PreciseParsedResults<T>;
+    /**
+     * An implementation of [the MIMEType class](https://bmeck.github.io/node-proposal-mime-api/).
+     *
+     * In accordance with browser conventions, all properties of `MIMEType` objects
+     * are implemented as getters and setters on the class prototype, rather than as
+     * data properties on the object itself.
+     *
+     * A MIME string is a structured string containing multiple meaningful
+     * components. When parsed, a `MIMEType` object is returned containing
+     * properties for each of these components.
+     * @since v19.1.0, v18.13.0
+     */
+    export class MIMEType {
+        /**
+         * Creates a new MIMEType object by parsing the input.
+         *
+         * A `TypeError` will be thrown if the `input` is not a valid MIME.
+         * Note that an effort will be made to coerce the given values into strings.
+         * @param input The input MIME to parse.
+         */
+        constructor(input: string | { toString: () => string });
+        /**
+         * Gets and sets the type portion of the MIME.
+         *
+         * ```js
+         * import { MIMEType } from 'node:util';
+         *
+         * const myMIME = new MIMEType('text/javascript');
+         * console.log(myMIME.type);
+         * // Prints: text
+         * myMIME.type = 'application';
+         * console.log(myMIME.type);
+         * // Prints: application
+         * console.log(String(myMIME));
+         * // Prints: application/javascript
+         * ```
+         */
+        type: string;
+        /**
+         * Gets and sets the subtype portion of the MIME.
+         *
+         * ```js
+         * import { MIMEType } from 'node:util';
+         *
+         * const myMIME = new MIMEType('text/ecmascript');
+         * console.log(myMIME.subtype);
+         * // Prints: ecmascript
+         * myMIME.subtype = 'javascript';
+         * console.log(myMIME.subtype);
+         * // Prints: javascript
+         * console.log(String(myMIME));
+         * // Prints: text/javascript
+         * ```
+         */
+        subtype: string;
+        /**
+         * Gets the essence of the MIME. This property is read only.
+         * Use `mime.type` or `mime.subtype` to alter the MIME.
+         *
+         * ```js
+         * import { MIMEType } from 'node:util';
+         *
+         * const myMIME = new MIMEType('text/javascript;key=value');
+         * console.log(myMIME.essence);
+         * // Prints: text/javascript
+         * myMIME.type = 'application';
+         * console.log(myMIME.essence);
+         * // Prints: application/javascript
+         * console.log(String(myMIME));
+         * // Prints: application/javascript;key=value
+         * ```
+         */
+        readonly essence: string;
+        /**
+         * Gets the `MIMEParams` object representing the
+         * parameters of the MIME. This property is read-only. See `MIMEParams` documentation for details.
+         */
+        readonly params: MIMEParams;
+        /**
+         * The `toString()` method on the `MIMEType` object returns the serialized MIME.
+         *
+         * Because of the need for standard compliance, this method does not allow users
+         * to customize the serialization process of the MIME.
+         */
+        toString(): string;
+    }
+    /**
+     * The `MIMEParams` API provides read and write access to the parameters of a `MIMEType`.
+     * @since v19.1.0, v18.13.0
+     */
+    export class MIMEParams {
+        /**
+         * Remove all name-value pairs whose name is `name`.
+         */
+        delete(name: string): void;
+        /**
+         * Returns an iterator over each of the name-value pairs in the parameters.
+         * Each item of the iterator is a JavaScript `Array`. The first item of the array
+         * is the `name`, the second item of the array is the `value`.
+         */
+        entries(): NodeJS.Iterator<[name: string, value: string]>;
+        /**
+         * Returns the value of the first name-value pair whose name is `name`. If there
+         * are no such pairs, `null` is returned.
+         * @return or `null` if there is no name-value pair with the given `name`.
+         */
+        get(name: string): string | null;
+        /**
+         * Returns `true` if there is at least one name-value pair whose name is `name`.
+         */
+        has(name: string): boolean;
+        /**
+         * Returns an iterator over the names of each name-value pair.
+         *
+         * ```js
+         * import { MIMEType } from 'node:util';
+         *
+         * const { params } = new MIMEType('text/plain;foo=0;bar=1');
+         * for (const name of params.keys()) {
+         *   console.log(name);
+         * }
+         * // Prints:
+         * //   foo
+         * //   bar
+         * ```
+         */
+        keys(): NodeJS.Iterator<string>;
+        /**
+         * Sets the value in the `MIMEParams` object associated with `name` to `value`. If there are any pre-existing name-value pairs whose names are `name`,
+         * set the first such pair's value to `value`.
+         *
+         * ```js
+         * import { MIMEType } from 'node:util';
+         *
+         * const { params } = new MIMEType('text/plain;foo=0;bar=1');
+         * params.set('foo', 'def');
+         * params.set('baz', 'xyz');
+         * console.log(params.toString());
+         * // Prints: foo=def;bar=1;baz=xyz
+         * ```
+         */
+        set(name: string, value: string): void;
+        /**
+         * Returns an iterator over the values of each name-value pair.
+         */
+        values(): NodeJS.Iterator<string>;
+        /**
+         * Returns an iterator over each of the name-value pairs in the parameters.
+         */
+        [Symbol.iterator](): NodeJS.Iterator<[name: string, value: string]>;
+    }
+    // #region web types
+    export interface TextDecodeOptions {
+        stream?: boolean;
+    }
+    export interface TextDecoderCommon {
+        readonly encoding: string;
+        readonly fatal: boolean;
+        readonly ignoreBOM: boolean;
+    }
+    export interface TextDecoderOptions {
+        fatal?: boolean;
+        ignoreBOM?: boolean;
+    }
+    export interface TextEncoderCommon {
+        readonly encoding: string;
+    }
+    export interface TextEncoderEncodeIntoResult {
+        read: number;
+        written: number;
+    }
+    export interface TextDecoder extends TextDecoderCommon {
+        decode(input?: NodeJS.AllowSharedBufferSource, options?: TextDecodeOptions): string;
+    }
+    export var TextDecoder: {
+        prototype: TextDecoder;
+        new(label?: string, options?: TextDecoderOptions): TextDecoder;
+    };
+    export interface TextEncoder extends TextEncoderCommon {
+        encode(input?: string): NodeJS.NonSharedUint8Array;
+        encodeInto(source: string, destination: Uint8Array): TextEncoderEncodeIntoResult;
+    }
+    export var TextEncoder: {
+        prototype: TextEncoder;
+        new(): TextEncoder;
+    };
+    // #endregion
+}
+declare module "util" {
+    export * from "node:util";
+}
diff --git a/mqtt-backend/node_modules/@types/node/util/types.d.ts b/mqtt-backend/node_modules/@types/node/util/types.d.ts
new file mode 100644
index 0000000..818825b
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/util/types.d.ts
@@ -0,0 +1,558 @@
+declare module "node:util/types" {
+    import { KeyObject, webcrypto } from "node:crypto";
+    /**
+     * Returns `true` if the value is a built-in [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) or
+     * [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instance.
+     *
+     * See also `util.types.isArrayBuffer()` and `util.types.isSharedArrayBuffer()`.
+     *
+     * ```js
+     * util.types.isAnyArrayBuffer(new ArrayBuffer());  // Returns true
+     * util.types.isAnyArrayBuffer(new SharedArrayBuffer());  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isAnyArrayBuffer(object: unknown): object is ArrayBufferLike;
+    /**
+     * Returns `true` if the value is an `arguments` object.
+     *
+     * ```js
+     * function foo() {
+     *   util.types.isArgumentsObject(arguments);  // Returns true
+     * }
+     * ```
+     * @since v10.0.0
+     */
+    function isArgumentsObject(object: unknown): object is IArguments;
+    /**
+     * Returns `true` if the value is a built-in [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) instance.
+     * This does _not_ include [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instances. Usually, it is
+     * desirable to test for both; See `util.types.isAnyArrayBuffer()` for that.
+     *
+     * ```js
+     * util.types.isArrayBuffer(new ArrayBuffer());  // Returns true
+     * util.types.isArrayBuffer(new SharedArrayBuffer());  // Returns false
+     * ```
+     * @since v10.0.0
+     */
+    function isArrayBuffer(object: unknown): object is ArrayBuffer;
+    /**
+     * Returns `true` if the value is an instance of one of the [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) views, such as typed
+     * array objects or [`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView). Equivalent to
+     * [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView).
+     *
+     * ```js
+     * util.types.isArrayBufferView(new Int8Array());  // true
+     * util.types.isArrayBufferView(Buffer.from('hello world')); // true
+     * util.types.isArrayBufferView(new DataView(new ArrayBuffer(16)));  // true
+     * util.types.isArrayBufferView(new ArrayBuffer());  // false
+     * ```
+     * @since v10.0.0
+     */
+    function isArrayBufferView(object: unknown): object is NodeJS.ArrayBufferView;
+    /**
+     * Returns `true` if the value is an [async function](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/async_function).
+     * This only reports back what the JavaScript engine is seeing;
+     * in particular, the return value may not match the original source code if
+     * a transpilation tool was used.
+     *
+     * ```js
+     * util.types.isAsyncFunction(function foo() {});  // Returns false
+     * util.types.isAsyncFunction(async function foo() {});  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isAsyncFunction(object: unknown): boolean;
+    /**
+     * Returns `true` if the value is a `BigInt64Array` instance.
+     *
+     * ```js
+     * util.types.isBigInt64Array(new BigInt64Array());   // Returns true
+     * util.types.isBigInt64Array(new BigUint64Array());  // Returns false
+     * ```
+     * @since v10.0.0
+     */
+    function isBigInt64Array(value: unknown): value is BigInt64Array;
+    /**
+     * Returns `true` if the value is a BigInt object, e.g. created
+     * by `Object(BigInt(123))`.
+     *
+     * ```js
+     * util.types.isBigIntObject(Object(BigInt(123)));   // Returns true
+     * util.types.isBigIntObject(BigInt(123));   // Returns false
+     * util.types.isBigIntObject(123);  // Returns false
+     * ```
+     * @since v10.4.0
+     */
+    function isBigIntObject(object: unknown): object is BigInt;
+    /**
+     * Returns `true` if the value is a `BigUint64Array` instance.
+     *
+     * ```js
+     * util.types.isBigUint64Array(new BigInt64Array());   // Returns false
+     * util.types.isBigUint64Array(new BigUint64Array());  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isBigUint64Array(value: unknown): value is BigUint64Array;
+    /**
+     * Returns `true` if the value is a boolean object, e.g. created
+     * by `new Boolean()`.
+     *
+     * ```js
+     * util.types.isBooleanObject(false);  // Returns false
+     * util.types.isBooleanObject(true);   // Returns false
+     * util.types.isBooleanObject(new Boolean(false)); // Returns true
+     * util.types.isBooleanObject(new Boolean(true));  // Returns true
+     * util.types.isBooleanObject(Boolean(false)); // Returns false
+     * util.types.isBooleanObject(Boolean(true));  // Returns false
+     * ```
+     * @since v10.0.0
+     */
+    function isBooleanObject(object: unknown): object is Boolean;
+    /**
+     * Returns `true` if the value is any boxed primitive object, e.g. created
+     * by `new Boolean()`, `new String()` or `Object(Symbol())`.
+     *
+     * For example:
+     *
+     * ```js
+     * util.types.isBoxedPrimitive(false); // Returns false
+     * util.types.isBoxedPrimitive(new Boolean(false)); // Returns true
+     * util.types.isBoxedPrimitive(Symbol('foo')); // Returns false
+     * util.types.isBoxedPrimitive(Object(Symbol('foo'))); // Returns true
+     * util.types.isBoxedPrimitive(Object(BigInt(5))); // Returns true
+     * ```
+     * @since v10.11.0
+     */
+    function isBoxedPrimitive(object: unknown): object is String | Number | BigInt | Boolean | Symbol;
+    /**
+     * Returns `true` if the value is a built-in [`DataView`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView) instance.
+     *
+     * ```js
+     * const ab = new ArrayBuffer(20);
+     * util.types.isDataView(new DataView(ab));  // Returns true
+     * util.types.isDataView(new Float64Array());  // Returns false
+     * ```
+     *
+     * See also [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView).
+     * @since v10.0.0
+     */
+    function isDataView(object: unknown): object is DataView;
+    /**
+     * Returns `true` if the value is a built-in [`Date`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date) instance.
+     *
+     * ```js
+     * util.types.isDate(new Date());  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isDate(object: unknown): object is Date;
+    /**
+     * Returns `true` if the value is a native `External` value.
+     *
+     * A native `External` value is a special type of object that contains a
+     * raw C++ pointer (`void*`) for access from native code, and has no other
+     * properties. Such objects are created either by Node.js internals or native
+     * addons. In JavaScript, they are
+     * [frozen](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/freeze) objects with a
+     * `null` prototype.
+     *
+     * ```c
+     * #include <js_native_api.h>
+     * #include <stdlib.h>
+     * napi_value result;
+     * static napi_value MyNapi(napi_env env, napi_callback_info info) {
+     *   int* raw = (int*) malloc(1024);
+     *   napi_status status = napi_create_external(env, (void*) raw, NULL, NULL, &result);
+     *   if (status != napi_ok) {
+     *     napi_throw_error(env, NULL, "napi_create_external failed");
+     *     return NULL;
+     *   }
+     *   return result;
+     * }
+     * ...
+     * DECLARE_NAPI_PROPERTY("myNapi", MyNapi)
+     * ...
+     * ```
+     *
+     * ```js
+     * import native from 'napi_addon.node';
+     * import { types } from 'node:util';
+     *
+     * const data = native.myNapi();
+     * types.isExternal(data); // returns true
+     * types.isExternal(0); // returns false
+     * types.isExternal(new String('foo')); // returns false
+     * ```
+     *
+     * For further information on `napi_create_external`, refer to
+     * [`napi_create_external()`](https://nodejs.org/docs/latest-v25.x/api/n-api.html#napi_create_external).
+     * @since v10.0.0
+     */
+    function isExternal(object: unknown): boolean;
+    /**
+     * Returns `true` if the value is a built-in [`Float16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float16Array) instance.
+     *
+     * ```js
+     * util.types.isFloat16Array(new ArrayBuffer());  // Returns false
+     * util.types.isFloat16Array(new Float16Array());  // Returns true
+     * util.types.isFloat16Array(new Float32Array());  // Returns false
+     * ```
+     * @since v24.0.0
+     */
+    function isFloat16Array(object: unknown): object is Float16Array;
+    /**
+     * Returns `true` if the value is a built-in [`Float32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float32Array) instance.
+     *
+     * ```js
+     * util.types.isFloat32Array(new ArrayBuffer());  // Returns false
+     * util.types.isFloat32Array(new Float32Array());  // Returns true
+     * util.types.isFloat32Array(new Float64Array());  // Returns false
+     * ```
+     * @since v10.0.0
+     */
+    function isFloat32Array(object: unknown): object is Float32Array;
+    /**
+     * Returns `true` if the value is a built-in [`Float64Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Float64Array) instance.
+     *
+     * ```js
+     * util.types.isFloat64Array(new ArrayBuffer());  // Returns false
+     * util.types.isFloat64Array(new Uint8Array());  // Returns false
+     * util.types.isFloat64Array(new Float64Array());  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isFloat64Array(object: unknown): object is Float64Array;
+    /**
+     * Returns `true` if the value is a generator function.
+     * This only reports back what the JavaScript engine is seeing;
+     * in particular, the return value may not match the original source code if
+     * a transpilation tool was used.
+     *
+     * ```js
+     * util.types.isGeneratorFunction(function foo() {});  // Returns false
+     * util.types.isGeneratorFunction(function* foo() {});  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isGeneratorFunction(object: unknown): object is GeneratorFunction;
+    /**
+     * Returns `true` if the value is a generator object as returned from a
+     * built-in generator function.
+     * This only reports back what the JavaScript engine is seeing;
+     * in particular, the return value may not match the original source code if
+     * a transpilation tool was used.
+     *
+     * ```js
+     * function* foo() {}
+     * const generator = foo();
+     * util.types.isGeneratorObject(generator);  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isGeneratorObject(object: unknown): object is Generator;
+    /**
+     * Returns `true` if the value is a built-in [`Int8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int8Array) instance.
+     *
+     * ```js
+     * util.types.isInt8Array(new ArrayBuffer());  // Returns false
+     * util.types.isInt8Array(new Int8Array());  // Returns true
+     * util.types.isInt8Array(new Float64Array());  // Returns false
+     * ```
+     * @since v10.0.0
+     */
+    function isInt8Array(object: unknown): object is Int8Array;
+    /**
+     * Returns `true` if the value is a built-in [`Int16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int16Array) instance.
+     *
+     * ```js
+     * util.types.isInt16Array(new ArrayBuffer());  // Returns false
+     * util.types.isInt16Array(new Int16Array());  // Returns true
+     * util.types.isInt16Array(new Float64Array());  // Returns false
+     * ```
+     * @since v10.0.0
+     */
+    function isInt16Array(object: unknown): object is Int16Array;
+    /**
+     * Returns `true` if the value is a built-in [`Int32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Int32Array) instance.
+     *
+     * ```js
+     * util.types.isInt32Array(new ArrayBuffer());  // Returns false
+     * util.types.isInt32Array(new Int32Array());  // Returns true
+     * util.types.isInt32Array(new Float64Array());  // Returns false
+     * ```
+     * @since v10.0.0
+     */
+    function isInt32Array(object: unknown): object is Int32Array;
+    /**
+     * Returns `true` if the value is a built-in [`Map`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) instance.
+     *
+     * ```js
+     * util.types.isMap(new Map());  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isMap<T>(
+        object: T | {},
+    ): object is T extends ReadonlyMap<any, any> ? (unknown extends T ? never : ReadonlyMap<any, any>)
+        : Map<unknown, unknown>;
+    /**
+     * Returns `true` if the value is an iterator returned for a built-in [`Map`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) instance.
+     *
+     * ```js
+     * const map = new Map();
+     * util.types.isMapIterator(map.keys());  // Returns true
+     * util.types.isMapIterator(map.values());  // Returns true
+     * util.types.isMapIterator(map.entries());  // Returns true
+     * util.types.isMapIterator(map[Symbol.iterator]());  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isMapIterator(object: unknown): boolean;
+    /**
+     * Returns `true` if the value is an instance of a [Module Namespace Object](https://tc39.github.io/ecma262/#sec-module-namespace-exotic-objects).
+     *
+     * ```js
+     * import * as ns from './a.js';
+     *
+     * util.types.isModuleNamespaceObject(ns);  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isModuleNamespaceObject(value: unknown): boolean;
+    /**
+     * Returns `true` if the value was returned by the constructor of a
+     * [built-in `Error` type](https://tc39.es/ecma262/#sec-error-objects).
+     *
+     * ```js
+     * console.log(util.types.isNativeError(new Error()));  // true
+     * console.log(util.types.isNativeError(new TypeError()));  // true
+     * console.log(util.types.isNativeError(new RangeError()));  // true
+     * ```
+     *
+     * Subclasses of the native error types are also native errors:
+     *
+     * ```js
+     * class MyError extends Error {}
+     * console.log(util.types.isNativeError(new MyError()));  // true
+     * ```
+     *
+     * A value being `instanceof` a native error class is not equivalent to `isNativeError()`
+     * returning `true` for that value. `isNativeError()` returns `true` for errors
+     * which come from a different [realm](https://tc39.es/ecma262/#realm) while `instanceof Error` returns `false`
+     * for these errors:
+     *
+     * ```js
+     * import { createContext, runInContext } from 'node:vm';
+     * import { types } from 'node:util';
+     *
+     * const context = createContext({});
+     * const myError = runInContext('new Error()', context);
+     * console.log(types.isNativeError(myError)); // true
+     * console.log(myError instanceof Error); // false
+     * ```
+     *
+     * Conversely, `isNativeError()` returns `false` for all objects which were not
+     * returned by the constructor of a native error. That includes values
+     * which are `instanceof` native errors:
+     *
+     * ```js
+     * const myError = { __proto__: Error.prototype };
+     * console.log(util.types.isNativeError(myError)); // false
+     * console.log(myError instanceof Error); // true
+     * ```
+     * @since v10.0.0
+     * @deprecated The `util.types.isNativeError` API is deprecated. Please use `Error.isError` instead.
+     */
+    function isNativeError(object: unknown): object is Error;
+    /**
+     * Returns `true` if the value is a number object, e.g. created
+     * by `new Number()`.
+     *
+     * ```js
+     * util.types.isNumberObject(0);  // Returns false
+     * util.types.isNumberObject(new Number(0));   // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isNumberObject(object: unknown): object is Number;
+    /**
+     * Returns `true` if the value is a built-in [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise).
+     *
+     * ```js
+     * util.types.isPromise(Promise.resolve(42));  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isPromise(object: unknown): object is Promise<unknown>;
+    /**
+     * Returns `true` if the value is a [`Proxy`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Proxy) instance.
+     *
+     * ```js
+     * const target = {};
+     * const proxy = new Proxy(target, {});
+     * util.types.isProxy(target);  // Returns false
+     * util.types.isProxy(proxy);  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isProxy(object: unknown): boolean;
+    /**
+     * Returns `true` if the value is a regular expression object.
+     *
+     * ```js
+     * util.types.isRegExp(/abc/);  // Returns true
+     * util.types.isRegExp(new RegExp('abc'));  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isRegExp(object: unknown): object is RegExp;
+    /**
+     * Returns `true` if the value is a built-in [`Set`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) instance.
+     *
+     * ```js
+     * util.types.isSet(new Set());  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isSet<T>(
+        object: T | {},
+    ): object is T extends ReadonlySet<any> ? (unknown extends T ? never : ReadonlySet<any>) : Set<unknown>;
+    /**
+     * Returns `true` if the value is an iterator returned for a built-in [`Set`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set) instance.
+     *
+     * ```js
+     * const set = new Set();
+     * util.types.isSetIterator(set.keys());  // Returns true
+     * util.types.isSetIterator(set.values());  // Returns true
+     * util.types.isSetIterator(set.entries());  // Returns true
+     * util.types.isSetIterator(set[Symbol.iterator]());  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isSetIterator(object: unknown): boolean;
+    /**
+     * Returns `true` if the value is a built-in [`SharedArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer) instance.
+     * This does _not_ include [`ArrayBuffer`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer) instances. Usually, it is
+     * desirable to test for both; See `util.types.isAnyArrayBuffer()` for that.
+     *
+     * ```js
+     * util.types.isSharedArrayBuffer(new ArrayBuffer());  // Returns false
+     * util.types.isSharedArrayBuffer(new SharedArrayBuffer());  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isSharedArrayBuffer(object: unknown): object is SharedArrayBuffer;
+    /**
+     * Returns `true` if the value is a string object, e.g. created
+     * by `new String()`.
+     *
+     * ```js
+     * util.types.isStringObject('foo');  // Returns false
+     * util.types.isStringObject(new String('foo'));   // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isStringObject(object: unknown): object is String;
+    /**
+     * Returns `true` if the value is a symbol object, created
+     * by calling `Object()` on a `Symbol` primitive.
+     *
+     * ```js
+     * const symbol = Symbol('foo');
+     * util.types.isSymbolObject(symbol);  // Returns false
+     * util.types.isSymbolObject(Object(symbol));   // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isSymbolObject(object: unknown): object is Symbol;
+    /**
+     * Returns `true` if the value is a built-in [`TypedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray) instance.
+     *
+     * ```js
+     * util.types.isTypedArray(new ArrayBuffer());  // Returns false
+     * util.types.isTypedArray(new Uint8Array());  // Returns true
+     * util.types.isTypedArray(new Float64Array());  // Returns true
+     * ```
+     *
+     * See also [`ArrayBuffer.isView()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/isView).
+     * @since v10.0.0
+     */
+    function isTypedArray(object: unknown): object is NodeJS.TypedArray;
+    /**
+     * Returns `true` if the value is a built-in [`Uint8Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array) instance.
+     *
+     * ```js
+     * util.types.isUint8Array(new ArrayBuffer());  // Returns false
+     * util.types.isUint8Array(new Uint8Array());  // Returns true
+     * util.types.isUint8Array(new Float64Array());  // Returns false
+     * ```
+     * @since v10.0.0
+     */
+    function isUint8Array(object: unknown): object is Uint8Array;
+    /**
+     * Returns `true` if the value is a built-in [`Uint8ClampedArray`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint8ClampedArray) instance.
+     *
+     * ```js
+     * util.types.isUint8ClampedArray(new ArrayBuffer());  // Returns false
+     * util.types.isUint8ClampedArray(new Uint8ClampedArray());  // Returns true
+     * util.types.isUint8ClampedArray(new Float64Array());  // Returns false
+     * ```
+     * @since v10.0.0
+     */
+    function isUint8ClampedArray(object: unknown): object is Uint8ClampedArray;
+    /**
+     * Returns `true` if the value is a built-in [`Uint16Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint16Array) instance.
+     *
+     * ```js
+     * util.types.isUint16Array(new ArrayBuffer());  // Returns false
+     * util.types.isUint16Array(new Uint16Array());  // Returns true
+     * util.types.isUint16Array(new Float64Array());  // Returns false
+     * ```
+     * @since v10.0.0
+     */
+    function isUint16Array(object: unknown): object is Uint16Array;
+    /**
+     * Returns `true` if the value is a built-in [`Uint32Array`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Uint32Array) instance.
+     *
+     * ```js
+     * util.types.isUint32Array(new ArrayBuffer());  // Returns false
+     * util.types.isUint32Array(new Uint32Array());  // Returns true
+     * util.types.isUint32Array(new Float64Array());  // Returns false
+     * ```
+     * @since v10.0.0
+     */
+    function isUint32Array(object: unknown): object is Uint32Array;
+    /**
+     * Returns `true` if the value is a built-in [`WeakMap`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakMap) instance.
+     *
+     * ```js
+     * util.types.isWeakMap(new WeakMap());  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isWeakMap(object: unknown): object is WeakMap<object, unknown>;
+    /**
+     * Returns `true` if the value is a built-in [`WeakSet`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakSet) instance.
+     *
+     * ```js
+     * util.types.isWeakSet(new WeakSet());  // Returns true
+     * ```
+     * @since v10.0.0
+     */
+    function isWeakSet(object: unknown): object is WeakSet<object>;
+    /**
+     * Returns `true` if `value` is a `KeyObject`, `false` otherwise.
+     * @since v16.2.0
+     */
+    function isKeyObject(object: unknown): object is KeyObject;
+    /**
+     * Returns `true` if `value` is a `CryptoKey`, `false` otherwise.
+     * @since v16.2.0
+     */
+    function isCryptoKey(object: unknown): object is webcrypto.CryptoKey;
+}
+declare module "util/types" {
+    export * from "node:util/types";
+}
diff --git a/mqtt-backend/node_modules/@types/node/v8.d.ts b/mqtt-backend/node_modules/@types/node/v8.d.ts
new file mode 100644
index 0000000..c121c61
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/v8.d.ts
@@ -0,0 +1,980 @@
+declare module "node:v8" {
+    import { NonSharedBuffer } from "node:buffer";
+    import { Readable } from "node:stream";
+    interface HeapSpaceInfo {
+        space_name: string;
+        space_size: number;
+        space_used_size: number;
+        space_available_size: number;
+        physical_space_size: number;
+    }
+    // ** Signifies if the --zap_code_space option is enabled or not.  1 == enabled, 0 == disabled. */
+    type DoesZapCodeSpaceFlag = 0 | 1;
+    interface HeapInfo {
+        total_heap_size: number;
+        total_heap_size_executable: number;
+        total_physical_size: number;
+        total_available_size: number;
+        used_heap_size: number;
+        heap_size_limit: number;
+        malloced_memory: number;
+        peak_malloced_memory: number;
+        does_zap_garbage: DoesZapCodeSpaceFlag;
+        number_of_native_contexts: number;
+        number_of_detached_contexts: number;
+        total_global_handles_size: number;
+        used_global_handles_size: number;
+        external_memory: number;
+        total_allocated_bytes: number;
+    }
+    interface HeapCodeStatistics {
+        code_and_metadata_size: number;
+        bytecode_and_metadata_size: number;
+        external_script_source_size: number;
+    }
+    interface HeapSnapshotOptions {
+        /**
+         * If true, expose internals in the heap snapshot.
+         * @default false
+         */
+        exposeInternals?: boolean | undefined;
+        /**
+         * If true, expose numeric values in artificial fields.
+         * @default false
+         */
+        exposeNumericValues?: boolean | undefined;
+    }
+    /**
+     * Returns an integer representing a version tag derived from the V8 version,
+     * command-line flags, and detected CPU features. This is useful for determining
+     * whether a `vm.Script` `cachedData` buffer is compatible with this instance
+     * of V8.
+     *
+     * ```js
+     * console.log(v8.cachedDataVersionTag()); // 3947234607
+     * // The value returned by v8.cachedDataVersionTag() is derived from the V8
+     * // version, command-line flags, and detected CPU features. Test that the value
+     * // does indeed update when flags are toggled.
+     * v8.setFlagsFromString('--allow_natives_syntax');
+     * console.log(v8.cachedDataVersionTag()); // 183726201
+     * ```
+     * @since v8.0.0
+     */
+    function cachedDataVersionTag(): number;
+    /**
+     * Returns an object with the following properties:
+     *
+     * `does_zap_garbage` is a 0/1 boolean, which signifies whether the `--zap_code_space` option is enabled or not. This makes V8 overwrite heap
+     * garbage with a bit pattern. The RSS footprint (resident set size) gets bigger
+     * because it continuously touches all heap pages and that makes them less likely
+     * to get swapped out by the operating system.
+     *
+     * `number_of_native_contexts` The value of native\_context is the number of the
+     * top-level contexts currently active. Increase of this number over time indicates
+     * a memory leak.
+     *
+     * `number_of_detached_contexts` The value of detached\_context is the number
+     * of contexts that were detached and not yet garbage collected. This number
+     * being non-zero indicates a potential memory leak.
+     *
+     * `total_global_handles_size` The value of total\_global\_handles\_size is the
+     * total memory size of V8 global handles.
+     *
+     * `used_global_handles_size` The value of used\_global\_handles\_size is the
+     * used memory size of V8 global handles.
+     *
+     * `external_memory` The value of external\_memory is the memory size of array
+     * buffers and external strings.
+     *
+     * `total_allocated_bytes` The value of total allocated bytes since the Isolate
+     * creation.
+     *
+     * ```js
+     * {
+     *   total_heap_size: 7326976,
+     *   total_heap_size_executable: 4194304,
+     *   total_physical_size: 7326976,
+     *   total_available_size: 1152656,
+     *   used_heap_size: 3476208,
+     *   heap_size_limit: 1535115264,
+     *   malloced_memory: 16384,
+     *   peak_malloced_memory: 1127496,
+     *   does_zap_garbage: 0,
+     *   number_of_native_contexts: 1,
+     *   number_of_detached_contexts: 0,
+     *   total_global_handles_size: 8192,
+     *   used_global_handles_size: 3296,
+     *   external_memory: 318824,
+     *   total_allocated_bytes: 45224088
+     * }
+     * ```
+     * @since v1.0.0
+     */
+    function getHeapStatistics(): HeapInfo;
+    /**
+     * It returns an object with a structure similar to the
+     * [`cppgc::HeapStatistics`](https://v8docs.nodesource.com/node-22.4/d7/d51/heap-statistics_8h_source.html)
+     * object. See the [V8 documentation](https://v8docs.nodesource.com/node-22.4/df/d2f/structcppgc_1_1_heap_statistics.html)
+     * for more information about the properties of the object.
+     *
+     * ```js
+     * // Detailed
+     * ({
+     *   committed_size_bytes: 131072,
+     *   resident_size_bytes: 131072,
+     *   used_size_bytes: 152,
+     *   space_statistics: [
+     *     {
+     *       name: 'NormalPageSpace0',
+     *       committed_size_bytes: 0,
+     *       resident_size_bytes: 0,
+     *       used_size_bytes: 0,
+     *       page_stats: [{}],
+     *       free_list_stats: {},
+     *     },
+     *     {
+     *       name: 'NormalPageSpace1',
+     *       committed_size_bytes: 131072,
+     *       resident_size_bytes: 131072,
+     *       used_size_bytes: 152,
+     *       page_stats: [{}],
+     *       free_list_stats: {},
+     *     },
+     *     {
+     *       name: 'NormalPageSpace2',
+     *       committed_size_bytes: 0,
+     *       resident_size_bytes: 0,
+     *       used_size_bytes: 0,
+     *       page_stats: [{}],
+     *       free_list_stats: {},
+     *     },
+     *     {
+     *       name: 'NormalPageSpace3',
+     *       committed_size_bytes: 0,
+     *       resident_size_bytes: 0,
+     *       used_size_bytes: 0,
+     *       page_stats: [{}],
+     *       free_list_stats: {},
+     *     },
+     *     {
+     *       name: 'LargePageSpace',
+     *       committed_size_bytes: 0,
+     *       resident_size_bytes: 0,
+     *       used_size_bytes: 0,
+     *       page_stats: [{}],
+     *       free_list_stats: {},
+     *     },
+     *   ],
+     *   type_names: [],
+     *   detail_level: 'detailed',
+     * });
+     * ```
+     *
+     * ```js
+     * // Brief
+     * ({
+     *   committed_size_bytes: 131072,
+     *   resident_size_bytes: 131072,
+     *   used_size_bytes: 128864,
+     *   space_statistics: [],
+     *   type_names: [],
+     *   detail_level: 'brief',
+     * });
+     * ```
+     * @since v22.15.0
+     * @param detailLevel **Default:** `'detailed'`. Specifies the level of detail in the returned statistics.
+     * Accepted values are:
+     * * `'brief'`:  Brief statistics contain only the top-level
+     * allocated and used
+     * memory statistics for the entire heap.
+     * * `'detailed'`: Detailed statistics also contain a break
+     * down per space and page, as well as freelist statistics
+     * and object type histograms.
+     */
+    function getCppHeapStatistics(detailLevel?: "brief" | "detailed"): object;
+    /**
+     * Returns statistics about the V8 heap spaces, i.e. the segments which make up
+     * the V8 heap. Neither the ordering of heap spaces, nor the availability of a
+     * heap space can be guaranteed as the statistics are provided via the
+     * V8 [`GetHeapSpaceStatistics`](https://v8docs.nodesource.com/node-13.2/d5/dda/classv8_1_1_isolate.html#ac673576f24fdc7a33378f8f57e1d13a4) function and may change from one V8 version to the
+     * next.
+     *
+     * The value returned is an array of objects containing the following properties:
+     *
+     * ```json
+     * [
+     *   {
+     *     "space_name": "new_space",
+     *     "space_size": 2063872,
+     *     "space_used_size": 951112,
+     *     "space_available_size": 80824,
+     *     "physical_space_size": 2063872
+     *   },
+     *   {
+     *     "space_name": "old_space",
+     *     "space_size": 3090560,
+     *     "space_used_size": 2493792,
+     *     "space_available_size": 0,
+     *     "physical_space_size": 3090560
+     *   },
+     *   {
+     *     "space_name": "code_space",
+     *     "space_size": 1260160,
+     *     "space_used_size": 644256,
+     *     "space_available_size": 960,
+     *     "physical_space_size": 1260160
+     *   },
+     *   {
+     *     "space_name": "map_space",
+     *     "space_size": 1094160,
+     *     "space_used_size": 201608,
+     *     "space_available_size": 0,
+     *     "physical_space_size": 1094160
+     *   },
+     *   {
+     *     "space_name": "large_object_space",
+     *     "space_size": 0,
+     *     "space_used_size": 0,
+     *     "space_available_size": 1490980608,
+     *     "physical_space_size": 0
+     *   }
+     * ]
+     * ```
+     * @since v6.0.0
+     */
+    function getHeapSpaceStatistics(): HeapSpaceInfo[];
+    /**
+     * The `v8.setFlagsFromString()` method can be used to programmatically set
+     * V8 command-line flags. This method should be used with care. Changing settings
+     * after the VM has started may result in unpredictable behavior, including
+     * crashes and data loss; or it may simply do nothing.
+     *
+     * The V8 options available for a version of Node.js may be determined by running `node --v8-options`.
+     *
+     * Usage:
+     *
+     * ```js
+     * // Print GC events to stdout for one minute.
+     * import v8 from 'node:v8';
+     * v8.setFlagsFromString('--trace_gc');
+     * setTimeout(() => { v8.setFlagsFromString('--notrace_gc'); }, 60e3);
+     * ```
+     * @since v1.0.0
+     */
+    function setFlagsFromString(flags: string): void;
+    /**
+     * This is similar to the [`queryObjects()` console API](https://developer.chrome.com/docs/devtools/console/utilities#queryObjects-function)
+     * provided by the Chromium DevTools console. It can be used to search for objects that have the matching constructor on its prototype chain
+     * in the heap after a full garbage collection, which can be useful for memory leak regression tests. To avoid surprising results, users should
+     * avoid using this API on constructors whose implementation they don't control, or on constructors that can be invoked by other parties in the
+     * application.
+     *
+     * To avoid accidental leaks, this API does not return raw references to the objects found. By default, it returns the count of the objects
+     * found. If `options.format` is `'summary'`, it returns an array containing brief string representations for each object. The visibility provided
+     * in this API is similar to what the heap snapshot provides, while users can save the cost of serialization and parsing and directly filter the
+     * target objects during the search.
+     *
+     * Only objects created in the current execution context are included in the results.
+     *
+     * ```js
+     * import { queryObjects } from 'node:v8';
+     * class A { foo = 'bar'; }
+     * console.log(queryObjects(A)); // 0
+     * const a = new A();
+     * console.log(queryObjects(A)); // 1
+     * // [ "A { foo: 'bar' }" ]
+     * console.log(queryObjects(A, { format: 'summary' }));
+     *
+     * class B extends A { bar = 'qux'; }
+     * const b = new B();
+     * console.log(queryObjects(B)); // 1
+     * // [ "B { foo: 'bar', bar: 'qux' }" ]
+     * console.log(queryObjects(B, { format: 'summary' }));
+     *
+     * // Note that, when there are child classes inheriting from a constructor,
+     * // the constructor also shows up in the prototype chain of the child
+     * // classes's prototoype, so the child classes's prototoype would also be
+     * // included in the result.
+     * console.log(queryObjects(A));  // 3
+     * // [ "B { foo: 'bar', bar: 'qux' }", 'A {}', "A { foo: 'bar' }" ]
+     * console.log(queryObjects(A, { format: 'summary' }));
+     * ```
+     * @param ctor The constructor that can be used to search on the prototype chain in order to filter target objects in the heap.
+     * @since v20.13.0
+     */
+    function queryObjects(ctor: Function): number | string[];
+    function queryObjects(ctor: Function, options: { format: "count" }): number;
+    function queryObjects(ctor: Function, options: { format: "summary" }): string[];
+    /**
+     * Generates a snapshot of the current V8 heap and returns a Readable
+     * Stream that may be used to read the JSON serialized representation.
+     * This JSON stream format is intended to be used with tools such as
+     * Chrome DevTools. The JSON schema is undocumented and specific to the
+     * V8 engine. Therefore, the schema may change from one version of V8 to the next.
+     *
+     * Creating a heap snapshot requires memory about twice the size of the heap at
+     * the time the snapshot is created. This results in the risk of OOM killers
+     * terminating the process.
+     *
+     * Generating a snapshot is a synchronous operation which blocks the event loop
+     * for a duration depending on the heap size.
+     *
+     * ```js
+     * // Print heap snapshot to the console
+     * import v8 from 'node:v8';
+     * const stream = v8.getHeapSnapshot();
+     * stream.pipe(process.stdout);
+     * ```
+     * @since v11.13.0
+     * @return A Readable containing the V8 heap snapshot.
+     */
+    function getHeapSnapshot(options?: HeapSnapshotOptions): Readable;
+    /**
+     * Generates a snapshot of the current V8 heap and writes it to a JSON
+     * file. This file is intended to be used with tools such as Chrome
+     * DevTools. The JSON schema is undocumented and specific to the V8
+     * engine, and may change from one version of V8 to the next.
+     *
+     * A heap snapshot is specific to a single V8 isolate. When using `worker threads`, a heap snapshot generated from the main thread will
+     * not contain any information about the workers, and vice versa.
+     *
+     * Creating a heap snapshot requires memory about twice the size of the heap at
+     * the time the snapshot is created. This results in the risk of OOM killers
+     * terminating the process.
+     *
+     * Generating a snapshot is a synchronous operation which blocks the event loop
+     * for a duration depending on the heap size.
+     *
+     * ```js
+     * import { writeHeapSnapshot } from 'node:v8';
+     * import {
+     *   Worker,
+     *   isMainThread,
+     *   parentPort,
+     * } from 'node:worker_threads';
+     *
+     * if (isMainThread) {
+     *   const worker = new Worker(__filename);
+     *
+     *   worker.once('message', (filename) => {
+     *     console.log(`worker heapdump: ${filename}`);
+     *     // Now get a heapdump for the main thread.
+     *     console.log(`main thread heapdump: ${writeHeapSnapshot()}`);
+     *   });
+     *
+     *   // Tell the worker to create a heapdump.
+     *   worker.postMessage('heapdump');
+     * } else {
+     *   parentPort.once('message', (message) => {
+     *     if (message === 'heapdump') {
+     *       // Generate a heapdump for the worker
+     *       // and return the filename to the parent.
+     *       parentPort.postMessage(writeHeapSnapshot());
+     *     }
+     *   });
+     * }
+     * ```
+     * @since v11.13.0
+     * @param filename The file path where the V8 heap snapshot is to be saved. If not specified, a file name with the pattern `'Heap-${yyyymmdd}-${hhmmss}-${pid}-${thread_id}.heapsnapshot'` will be
+     * generated, where `{pid}` will be the PID of the Node.js process, `{thread_id}` will be `0` when `writeHeapSnapshot()` is called from the main Node.js thread or the id of a
+     * worker thread.
+     * @return The filename where the snapshot was saved.
+     */
+    function writeHeapSnapshot(filename?: string, options?: HeapSnapshotOptions): string;
+    /**
+     * Get statistics about code and its metadata in the heap, see
+     * V8 [`GetHeapCodeAndMetadataStatistics`](https://v8docs.nodesource.com/node-13.2/d5/dda/classv8_1_1_isolate.html#a6079122af17612ef54ef3348ce170866) API. Returns an object with the
+     * following properties:
+     *
+     * ```js
+     * {
+     *   code_and_metadata_size: 212208,
+     *   bytecode_and_metadata_size: 161368,
+     *   external_script_source_size: 1410794,
+     *   cpu_profiler_metadata_size: 0,
+     * }
+     * ```
+     * @since v12.8.0
+     */
+    function getHeapCodeStatistics(): HeapCodeStatistics;
+    /**
+     * @since v25.0.0
+     */
+    interface SyncCPUProfileHandle {
+        /**
+         * Stopping collecting the profile and return the profile data.
+         * @since v25.0.0
+         */
+        stop(): string;
+        /**
+         * Stopping collecting the profile and the profile will be discarded.
+         * @since v25.0.0
+         */
+        [Symbol.dispose](): void;
+    }
+    /**
+     * @since v24.8.0
+     */
+    interface CPUProfileHandle {
+        /**
+         * Stopping collecting the profile, then return a Promise that fulfills with an error or the
+         * profile data.
+         * @since v24.8.0
+         */
+        stop(): Promise<string>;
+        /**
+         * Stopping collecting the profile and the profile will be discarded.
+         * @since v24.8.0
+         */
+        [Symbol.asyncDispose](): Promise<void>;
+    }
+    /**
+     * @since v24.9.0
+     */
+    interface HeapProfileHandle {
+        /**
+         * Stopping collecting the profile, then return a Promise that fulfills with an error or the
+         * profile data.
+         * @since v24.9.0
+         */
+        stop(): Promise<string>;
+        /**
+         * Stopping collecting the profile and the profile will be discarded.
+         * @since v24.9.0
+         */
+        [Symbol.asyncDispose](): Promise<void>;
+    }
+    /**
+     * Starting a CPU profile then return a `SyncCPUProfileHandle` object.
+     * This API supports `using` syntax.
+     *
+     * ```js
+     * const handle = v8.startCpuProfile();
+     * const profile = handle.stop();
+     * console.log(profile);
+     * ```
+     * @since v25.0.0
+     */
+    function startCpuProfile(): SyncCPUProfileHandle;
+    /**
+     * V8 only supports `Latin-1/ISO-8859-1` and `UTF16` as the underlying representation of a string.
+     * If the `content` uses `Latin-1/ISO-8859-1` as the underlying representation, this function will return true;
+     * otherwise, it returns false.
+     *
+     * If this method returns false, that does not mean that the string contains some characters not in `Latin-1/ISO-8859-1`.
+     * Sometimes a `Latin-1` string may also be represented as `UTF16`.
+     *
+     * ```js
+     * const { isStringOneByteRepresentation } = require('node:v8');
+     *
+     * const Encoding = {
+     *   latin1: 1,
+     *   utf16le: 2,
+     * };
+     * const buffer = Buffer.alloc(100);
+     * function writeString(input) {
+     *   if (isStringOneByteRepresentation(input)) {
+     *     buffer.writeUint8(Encoding.latin1);
+     *     buffer.writeUint32LE(input.length, 1);
+     *     buffer.write(input, 5, 'latin1');
+     *   } else {
+     *     buffer.writeUint8(Encoding.utf16le);
+     *     buffer.writeUint32LE(input.length * 2, 1);
+     *     buffer.write(input, 5, 'utf16le');
+     *   }
+     * }
+     * writeString('hello');
+     * writeString('你好');
+     * ```
+     * @since v23.10.0, v22.15.0
+     */
+    function isStringOneByteRepresentation(content: string): boolean;
+    /**
+     * @since v8.0.0
+     */
+    class Serializer {
+        /**
+         * Writes out a header, which includes the serialization format version.
+         */
+        writeHeader(): void;
+        /**
+         * Serializes a JavaScript value and adds the serialized representation to the
+         * internal buffer.
+         *
+         * This throws an error if `value` cannot be serialized.
+         */
+        writeValue(val: any): boolean;
+        /**
+         * Returns the stored internal buffer. This serializer should not be used once
+         * the buffer is released. Calling this method results in undefined behavior
+         * if a previous write has failed.
+         */
+        releaseBuffer(): NonSharedBuffer;
+        /**
+         * Marks an `ArrayBuffer` as having its contents transferred out of band.
+         * Pass the corresponding `ArrayBuffer` in the deserializing context to `deserializer.transferArrayBuffer()`.
+         * @param id A 32-bit unsigned integer.
+         * @param arrayBuffer An `ArrayBuffer` instance.
+         */
+        transferArrayBuffer(id: number, arrayBuffer: ArrayBuffer): void;
+        /**
+         * Write a raw 32-bit unsigned integer.
+         * For use inside of a custom `serializer._writeHostObject()`.
+         */
+        writeUint32(value: number): void;
+        /**
+         * Write a raw 64-bit unsigned integer, split into high and low 32-bit parts.
+         * For use inside of a custom `serializer._writeHostObject()`.
+         */
+        writeUint64(hi: number, lo: number): void;
+        /**
+         * Write a JS `number` value.
+         * For use inside of a custom `serializer._writeHostObject()`.
+         */
+        writeDouble(value: number): void;
+        /**
+         * Write raw bytes into the serializer's internal buffer. The deserializer
+         * will require a way to compute the length of the buffer.
+         * For use inside of a custom `serializer._writeHostObject()`.
+         */
+        writeRawBytes(buffer: NodeJS.ArrayBufferView): void;
+    }
+    /**
+     * A subclass of `Serializer` that serializes `TypedArray`(in particular `Buffer`) and `DataView` objects as host objects, and only
+     * stores the part of their underlying `ArrayBuffer`s that they are referring to.
+     * @since v8.0.0
+     */
+    class DefaultSerializer extends Serializer {}
+    /**
+     * @since v8.0.0
+     */
+    class Deserializer {
+        constructor(data: NodeJS.TypedArray);
+        /**
+         * Reads and validates a header (including the format version).
+         * May, for example, reject an invalid or unsupported wire format. In that case,
+         * an `Error` is thrown.
+         */
+        readHeader(): boolean;
+        /**
+         * Deserializes a JavaScript value from the buffer and returns it.
+         */
+        readValue(): any;
+        /**
+         * Marks an `ArrayBuffer` as having its contents transferred out of band.
+         * Pass the corresponding `ArrayBuffer` in the serializing context to `serializer.transferArrayBuffer()` (or return the `id` from `serializer._getSharedArrayBufferId()` in the case of
+         * `SharedArrayBuffer`s).
+         * @param id A 32-bit unsigned integer.
+         * @param arrayBuffer An `ArrayBuffer` instance.
+         */
+        transferArrayBuffer(id: number, arrayBuffer: ArrayBuffer): void;
+        /**
+         * Reads the underlying wire format version. Likely mostly to be useful to
+         * legacy code reading old wire format versions. May not be called before `.readHeader()`.
+         */
+        getWireFormatVersion(): number;
+        /**
+         * Read a raw 32-bit unsigned integer and return it.
+         * For use inside of a custom `deserializer._readHostObject()`.
+         */
+        readUint32(): number;
+        /**
+         * Read a raw 64-bit unsigned integer and return it as an array `[hi, lo]` with two 32-bit unsigned integer entries.
+         * For use inside of a custom `deserializer._readHostObject()`.
+         */
+        readUint64(): [number, number];
+        /**
+         * Read a JS `number` value.
+         * For use inside of a custom `deserializer._readHostObject()`.
+         */
+        readDouble(): number;
+        /**
+         * Read raw bytes from the deserializer's internal buffer. The `length` parameter
+         * must correspond to the length of the buffer that was passed to `serializer.writeRawBytes()`.
+         * For use inside of a custom `deserializer._readHostObject()`.
+         */
+        readRawBytes(length: number): Buffer;
+    }
+    /**
+     * A subclass of `Deserializer` corresponding to the format written by `DefaultSerializer`.
+     * @since v8.0.0
+     */
+    class DefaultDeserializer extends Deserializer {}
+    /**
+     * Uses a `DefaultSerializer` to serialize `value` into a buffer.
+     *
+     * `ERR_BUFFER_TOO_LARGE` will be thrown when trying to
+     * serialize a huge object which requires buffer
+     * larger than `buffer.constants.MAX_LENGTH`.
+     * @since v8.0.0
+     */
+    function serialize(value: any): NonSharedBuffer;
+    /**
+     * Uses a `DefaultDeserializer` with default options to read a JS value
+     * from a buffer.
+     * @since v8.0.0
+     * @param buffer A buffer returned by {@link serialize}.
+     */
+    function deserialize(buffer: NodeJS.ArrayBufferView): any;
+    /**
+     * The `v8.takeCoverage()` method allows the user to write the coverage started by `NODE_V8_COVERAGE` to disk on demand. This method can be invoked multiple
+     * times during the lifetime of the process. Each time the execution counter will
+     * be reset and a new coverage report will be written to the directory specified
+     * by `NODE_V8_COVERAGE`.
+     *
+     * When the process is about to exit, one last coverage will still be written to
+     * disk unless {@link stopCoverage} is invoked before the process exits.
+     * @since v15.1.0, v14.18.0, v12.22.0
+     */
+    function takeCoverage(): void;
+    /**
+     * The `v8.stopCoverage()` method allows the user to stop the coverage collection
+     * started by `NODE_V8_COVERAGE`, so that V8 can release the execution count
+     * records and optimize code. This can be used in conjunction with {@link takeCoverage} if the user wants to collect the coverage on demand.
+     * @since v15.1.0, v14.18.0, v12.22.0
+     */
+    function stopCoverage(): void;
+    /**
+     * The API is a no-op if `--heapsnapshot-near-heap-limit` is already set from the command line or the API is called more than once.
+     * `limit` must be a positive integer. See [`--heapsnapshot-near-heap-limit`](https://nodejs.org/docs/latest-v25.x/api/cli.html#--heapsnapshot-near-heap-limitmax_count) for more information.
+     * @since v18.10.0, v16.18.0
+     */
+    function setHeapSnapshotNearHeapLimit(limit: number): void;
+    /**
+     * This API collects GC data in current thread.
+     * @since v19.6.0, v18.15.0
+     */
+    class GCProfiler {
+        /**
+         * Start collecting GC data.
+         * @since v19.6.0, v18.15.0
+         */
+        start(): void;
+        /**
+         * Stop collecting GC data and return an object. The content of object
+         * is as follows.
+         *
+         * ```json
+         * {
+         *   "version": 1,
+         *   "startTime": 1674059033862,
+         *   "statistics": [
+         *     {
+         *       "gcType": "Scavenge",
+         *       "beforeGC": {
+         *         "heapStatistics": {
+         *           "totalHeapSize": 5005312,
+         *           "totalHeapSizeExecutable": 524288,
+         *           "totalPhysicalSize": 5226496,
+         *           "totalAvailableSize": 4341325216,
+         *           "totalGlobalHandlesSize": 8192,
+         *           "usedGlobalHandlesSize": 2112,
+         *           "usedHeapSize": 4883840,
+         *           "heapSizeLimit": 4345298944,
+         *           "mallocedMemory": 254128,
+         *           "externalMemory": 225138,
+         *           "peakMallocedMemory": 181760
+         *         },
+         *         "heapSpaceStatistics": [
+         *           {
+         *             "spaceName": "read_only_space",
+         *             "spaceSize": 0,
+         *             "spaceUsedSize": 0,
+         *             "spaceAvailableSize": 0,
+         *             "physicalSpaceSize": 0
+         *           }
+         *         ]
+         *       },
+         *       "cost": 1574.14,
+         *       "afterGC": {
+         *         "heapStatistics": {
+         *           "totalHeapSize": 6053888,
+         *           "totalHeapSizeExecutable": 524288,
+         *           "totalPhysicalSize": 5500928,
+         *           "totalAvailableSize": 4341101384,
+         *           "totalGlobalHandlesSize": 8192,
+         *           "usedGlobalHandlesSize": 2112,
+         *           "usedHeapSize": 4059096,
+         *           "heapSizeLimit": 4345298944,
+         *           "mallocedMemory": 254128,
+         *           "externalMemory": 225138,
+         *           "peakMallocedMemory": 181760
+         *         },
+         *         "heapSpaceStatistics": [
+         *           {
+         *             "spaceName": "read_only_space",
+         *             "spaceSize": 0,
+         *             "spaceUsedSize": 0,
+         *             "spaceAvailableSize": 0,
+         *             "physicalSpaceSize": 0
+         *           }
+         *         ]
+         *       }
+         *     }
+         *   ],
+         *   "endTime": 1674059036865
+         * }
+         * ```
+         *
+         * Here's an example.
+         *
+         * ```js
+         * import { GCProfiler } from 'node:v8';
+         * const profiler = new GCProfiler();
+         * profiler.start();
+         * setTimeout(() => {
+         *   console.log(profiler.stop());
+         * }, 1000);
+         * ```
+         * @since v19.6.0, v18.15.0
+         */
+        stop(): GCProfilerResult;
+        /**
+         * Stop collecting GC data, and discard the profile.
+         * @since v25.5.0
+         */
+        [Symbol.dispose](): void;
+    }
+    interface GCProfilerResult {
+        version: number;
+        startTime: number;
+        endTime: number;
+        statistics: Array<{
+            gcType: string;
+            cost: number;
+            beforeGC: {
+                heapStatistics: HeapStatistics;
+                heapSpaceStatistics: HeapSpaceStatistics[];
+            };
+            afterGC: {
+                heapStatistics: HeapStatistics;
+                heapSpaceStatistics: HeapSpaceStatistics[];
+            };
+        }>;
+    }
+    interface HeapStatistics {
+        totalHeapSize: number;
+        totalHeapSizeExecutable: number;
+        totalPhysicalSize: number;
+        totalAvailableSize: number;
+        totalGlobalHandlesSize: number;
+        usedGlobalHandlesSize: number;
+        usedHeapSize: number;
+        heapSizeLimit: number;
+        mallocedMemory: number;
+        externalMemory: number;
+        peakMallocedMemory: number;
+    }
+    interface HeapSpaceStatistics {
+        spaceName: string;
+        spaceSize: number;
+        spaceUsedSize: number;
+        spaceAvailableSize: number;
+        physicalSpaceSize: number;
+    }
+    /**
+     * Called when a promise is constructed. This does not mean that corresponding before/after events will occur, only that the possibility exists. This will
+     * happen if a promise is created without ever getting a continuation.
+     * @since v17.1.0, v16.14.0
+     * @param promise The promise being created.
+     * @param parent The promise continued from, if applicable.
+     */
+    interface Init {
+        (promise: Promise<unknown>, parent: Promise<unknown>): void;
+    }
+    /**
+     * Called before a promise continuation executes. This can be in the form of `then()`, `catch()`, or `finally()` handlers or an await resuming.
+     *
+     * The before callback will be called 0 to N times. The before callback will typically be called 0 times if no continuation was ever made for the promise.
+     * The before callback may be called many times in the case where many continuations have been made from the same promise.
+     * @since v17.1.0, v16.14.0
+     */
+    interface Before {
+        (promise: Promise<unknown>): void;
+    }
+    /**
+     * Called immediately after a promise continuation executes. This may be after a `then()`, `catch()`, or `finally()` handler or before an await after another await.
+     * @since v17.1.0, v16.14.0
+     */
+    interface After {
+        (promise: Promise<unknown>): void;
+    }
+    /**
+     * Called when the promise receives a resolution or rejection value. This may occur synchronously in the case of {@link Promise.resolve()} or
+     * {@link Promise.reject()}.
+     * @since v17.1.0, v16.14.0
+     */
+    interface Settled {
+        (promise: Promise<unknown>): void;
+    }
+    /**
+     * Key events in the lifetime of a promise have been categorized into four areas: creation of a promise, before/after a continuation handler is called or
+     * around an await, and when the promise resolves or rejects.
+     *
+     * Because promises are asynchronous resources whose lifecycle is tracked via the promise hooks mechanism, the `init()`, `before()`, `after()`, and
+     * `settled()` callbacks must not be async functions as they create more promises which would produce an infinite loop.
+     * @since v17.1.0, v16.14.0
+     */
+    interface HookCallbacks {
+        init?: Init;
+        before?: Before;
+        after?: After;
+        settled?: Settled;
+    }
+    interface PromiseHooks {
+        /**
+         * The `init` hook must be a plain function. Providing an async function will throw as it would produce an infinite microtask loop.
+         * @since v17.1.0, v16.14.0
+         * @param init The {@link Init | `init` callback} to call when a promise is created.
+         * @return Call to stop the hook.
+         */
+        onInit: (init: Init) => Function;
+        /**
+         * The `settled` hook must be a plain function. Providing an async function will throw as it would produce an infinite microtask loop.
+         * @since v17.1.0, v16.14.0
+         * @param settled The {@link Settled | `settled` callback} to call when a promise is created.
+         * @return Call to stop the hook.
+         */
+        onSettled: (settled: Settled) => Function;
+        /**
+         * The `before` hook must be a plain function. Providing an async function will throw as it would produce an infinite microtask loop.
+         * @since v17.1.0, v16.14.0
+         * @param before The {@link Before | `before` callback} to call before a promise continuation executes.
+         * @return Call to stop the hook.
+         */
+        onBefore: (before: Before) => Function;
+        /**
+         * The `after` hook must be a plain function. Providing an async function will throw as it would produce an infinite microtask loop.
+         * @since v17.1.0, v16.14.0
+         * @param after The {@link After | `after` callback} to call after a promise continuation executes.
+         * @return Call to stop the hook.
+         */
+        onAfter: (after: After) => Function;
+        /**
+         * Registers functions to be called for different lifetime events of each promise.
+         * The callbacks `init()`/`before()`/`after()`/`settled()` are called for the respective events during a promise's lifetime.
+         * All callbacks are optional. For example, if only promise creation needs to be tracked, then only the init callback needs to be passed.
+         * The hook callbacks must be plain functions. Providing async functions will throw as it would produce an infinite microtask loop.
+         * @since v17.1.0, v16.14.0
+         * @param callbacks The {@link HookCallbacks | Hook Callbacks} to register
+         * @return Used for disabling hooks
+         */
+        createHook: (callbacks: HookCallbacks) => Function;
+    }
+    /**
+     * The `promiseHooks` interface can be used to track promise lifecycle events.
+     * @since v17.1.0, v16.14.0
+     */
+    const promiseHooks: PromiseHooks;
+    type StartupSnapshotCallbackFn = (args: any) => any;
+    /**
+     * The `v8.startupSnapshot` interface can be used to add serialization and deserialization hooks for custom startup snapshots.
+     *
+     * ```bash
+     * $ node --snapshot-blob snapshot.blob --build-snapshot entry.js
+     * # This launches a process with the snapshot
+     * $ node --snapshot-blob snapshot.blob
+     * ```
+     *
+     * In the example above, `entry.js` can use methods from the `v8.startupSnapshot` interface to specify how to save information for custom objects
+     * in the snapshot during serialization and how the information can be used to synchronize these objects during deserialization of the snapshot.
+     * For example, if the `entry.js` contains the following script:
+     *
+     * ```js
+     * 'use strict';
+     *
+     * import fs from 'node:fs';
+     * import zlib from 'node:zlib';
+     * import path from 'node:path';
+     * import assert from 'node:assert';
+     *
+     * import v8 from 'node:v8';
+     *
+     * class BookShelf {
+     *   storage = new Map();
+     *
+     *   // Reading a series of files from directory and store them into storage.
+     *   constructor(directory, books) {
+     *     for (const book of books) {
+     *       this.storage.set(book, fs.readFileSync(path.join(directory, book)));
+     *     }
+     *   }
+     *
+     *   static compressAll(shelf) {
+     *     for (const [ book, content ] of shelf.storage) {
+     *       shelf.storage.set(book, zlib.gzipSync(content));
+     *     }
+     *   }
+     *
+     *   static decompressAll(shelf) {
+     *     for (const [ book, content ] of shelf.storage) {
+     *       shelf.storage.set(book, zlib.gunzipSync(content));
+     *     }
+     *   }
+     * }
+     *
+     * // __dirname here is where the snapshot script is placed
+     * // during snapshot building time.
+     * const shelf = new BookShelf(__dirname, [
+     *   'book1.en_US.txt',
+     *   'book1.es_ES.txt',
+     *   'book2.zh_CN.txt',
+     * ]);
+     *
+     * assert(v8.startupSnapshot.isBuildingSnapshot());
+     * // On snapshot serialization, compress the books to reduce size.
+     * v8.startupSnapshot.addSerializeCallback(BookShelf.compressAll, shelf);
+     * // On snapshot deserialization, decompress the books.
+     * v8.startupSnapshot.addDeserializeCallback(BookShelf.decompressAll, shelf);
+     * v8.startupSnapshot.setDeserializeMainFunction((shelf) => {
+     *   // process.env and process.argv are refreshed during snapshot
+     *   // deserialization.
+     *   const lang = process.env.BOOK_LANG || 'en_US';
+     *   const book = process.argv[1];
+     *   const name = `${book}.${lang}.txt`;
+     *   console.log(shelf.storage.get(name));
+     * }, shelf);
+     * ```
+     *
+     * The resulted binary will get print the data deserialized from the snapshot during start up, using the refreshed `process.env` and `process.argv` of the launched process:
+     *
+     * ```bash
+     * $ BOOK_LANG=es_ES node --snapshot-blob snapshot.blob book1
+     * # Prints content of book1.es_ES.txt deserialized from the snapshot.
+     * ```
+     *
+     * Currently the application deserialized from a user-land snapshot cannot be snapshotted again, so these APIs are only available to applications that are not deserialized from a user-land snapshot.
+     *
+     * @since v18.6.0, v16.17.0
+     */
+    namespace startupSnapshot {
+        /**
+         * Add a callback that will be called when the Node.js instance is about to get serialized into a snapshot and exit.
+         * This can be used to release resources that should not or cannot be serialized or to convert user data into a form more suitable for serialization.
+         * @since v18.6.0, v16.17.0
+         */
+        function addSerializeCallback(callback: StartupSnapshotCallbackFn, data?: any): void;
+        /**
+         * Add a callback that will be called when the Node.js instance is deserialized from a snapshot.
+         * The `callback` and the `data` (if provided) will be serialized into the snapshot, they can be used to re-initialize the state of the application or
+         * to re-acquire resources that the application needs when the application is restarted from the snapshot.
+         * @since v18.6.0, v16.17.0
+         */
+        function addDeserializeCallback(callback: StartupSnapshotCallbackFn, data?: any): void;
+        /**
+         * This sets the entry point of the Node.js application when it is deserialized from a snapshot. This can be called only once in the snapshot building script.
+         * If called, the deserialized application no longer needs an additional entry point script to start up and will simply invoke the callback along with the deserialized
+         * data (if provided), otherwise an entry point script still needs to be provided to the deserialized application.
+         * @since v18.6.0, v16.17.0
+         */
+        function setDeserializeMainFunction(callback: StartupSnapshotCallbackFn, data?: any): void;
+        /**
+         * Returns true if the Node.js instance is run to build a snapshot.
+         * @since v18.6.0, v16.17.0
+         */
+        function isBuildingSnapshot(): boolean;
+    }
+}
+declare module "v8" {
+    export * from "node:v8";
+}
diff --git a/mqtt-backend/node_modules/@types/node/vm.d.ts b/mqtt-backend/node_modules/@types/node/vm.d.ts
new file mode 100644
index 0000000..a349741
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/vm.d.ts
@@ -0,0 +1,1170 @@
+declare module "node:vm" {
+    import { NonSharedBuffer } from "node:buffer";
+    import { ImportAttributes, ImportPhase } from "node:module";
+    interface Context extends NodeJS.Dict<any> {}
+    interface BaseOptions {
+        /**
+         * Specifies the filename used in stack traces produced by this script.
+         * @default ''
+         */
+        filename?: string | undefined;
+        /**
+         * Specifies the line number offset that is displayed in stack traces produced by this script.
+         * @default 0
+         */
+        lineOffset?: number | undefined;
+        /**
+         * Specifies the column number offset that is displayed in stack traces produced by this script.
+         * @default 0
+         */
+        columnOffset?: number | undefined;
+    }
+    type DynamicModuleLoader<T> = (
+        specifier: string,
+        referrer: T,
+        importAttributes: ImportAttributes,
+        phase: ImportPhase,
+    ) => Module | Promise<Module>;
+    interface ScriptOptions extends BaseOptions {
+        /**
+         * Provides an optional data with V8's code cache data for the supplied source.
+         */
+        cachedData?: NodeJS.ArrayBufferView | undefined;
+        /** @deprecated in favor of `script.createCachedData()` */
+        produceCachedData?: boolean | undefined;
+        /**
+         * Used to specify how the modules should be loaded during the evaluation of this script when `import()` is called. This option is
+         * part of the experimental modules API. We do not recommend using it in a production environment. For detailed information, see
+         * [Support of dynamic `import()` in compilation APIs](https://nodejs.org/docs/latest-v25.x/api/vm.html#support-of-dynamic-import-in-compilation-apis).
+         * @experimental
+         */
+        importModuleDynamically?:
+            | DynamicModuleLoader<Script>
+            | typeof constants.USE_MAIN_CONTEXT_DEFAULT_LOADER
+            | undefined;
+    }
+    interface RunningScriptOptions extends BaseOptions {
+        /**
+         * When `true`, if an `Error` occurs while compiling the `code`, the line of code causing the error is attached to the stack trace.
+         * @default true
+         */
+        displayErrors?: boolean | undefined;
+        /**
+         * Specifies the number of milliseconds to execute code before terminating execution.
+         * If execution is terminated, an `Error` will be thrown. This value must be a strictly positive integer.
+         */
+        timeout?: number | undefined;
+        /**
+         * If `true`, the execution will be terminated when `SIGINT` (Ctrl+C) is received.
+         * Existing handlers for the event that have been attached via `process.on('SIGINT')` will be disabled during script execution, but will continue to work after that.
+         * If execution is terminated, an `Error` will be thrown.
+         * @default false
+         */
+        breakOnSigint?: boolean | undefined;
+    }
+    interface RunningScriptInNewContextOptions
+        extends RunningScriptOptions, Pick<CreateContextOptions, "microtaskMode">
+    {
+        /**
+         * Human-readable name of the newly created context.
+         */
+        contextName?: CreateContextOptions["name"] | undefined;
+        /**
+         * Origin corresponding to the newly created context for display purposes. The origin should be formatted like a URL,
+         * but with only the scheme, host, and port (if necessary), like the value of the `url.origin` property of a `URL` object.
+         * Most notably, this string should omit the trailing slash, as that denotes a path.
+         */
+        contextOrigin?: CreateContextOptions["origin"] | undefined;
+        contextCodeGeneration?: CreateContextOptions["codeGeneration"] | undefined;
+    }
+    interface RunningCodeOptions extends RunningScriptOptions, Pick<ScriptOptions, "cachedData"> {
+        /**
+         * Used to specify how the modules should be loaded during the evaluation of this script when `import()` is called. This option is
+         * part of the experimental modules API. We do not recommend using it in a production environment. For detailed information, see
+         * [Support of dynamic `import()` in compilation APIs](https://nodejs.org/docs/latest-v25.x/api/vm.html#support-of-dynamic-import-in-compilation-apis).
+         * @experimental
+         */
+        importModuleDynamically?:
+            | DynamicModuleLoader<Script>
+            | typeof constants.USE_MAIN_CONTEXT_DEFAULT_LOADER
+            | undefined;
+    }
+    interface RunningCodeInNewContextOptions
+        extends RunningScriptInNewContextOptions, Pick<ScriptOptions, "cachedData">
+    {
+        /**
+         * Used to specify how the modules should be loaded during the evaluation of this script when `import()` is called. This option is
+         * part of the experimental modules API. We do not recommend using it in a production environment. For detailed information, see
+         * [Support of dynamic `import()` in compilation APIs](https://nodejs.org/docs/latest-v25.x/api/vm.html#support-of-dynamic-import-in-compilation-apis).
+         * @experimental
+         */
+        importModuleDynamically?:
+            | DynamicModuleLoader<Script>
+            | typeof constants.USE_MAIN_CONTEXT_DEFAULT_LOADER
+            | undefined;
+    }
+    interface CompileFunctionOptions extends BaseOptions, Pick<ScriptOptions, "cachedData" | "produceCachedData"> {
+        /**
+         * The sandbox/context in which the said function should be compiled in.
+         */
+        parsingContext?: Context | undefined;
+        /**
+         * An array containing a collection of context extensions (objects wrapping the current scope) to be applied while compiling
+         */
+        contextExtensions?: Object[] | undefined;
+        /**
+         * Used to specify how the modules should be loaded during the evaluation of this script when `import()` is called. This option is
+         * part of the experimental modules API. We do not recommend using it in a production environment. For detailed information, see
+         * [Support of dynamic `import()` in compilation APIs](https://nodejs.org/docs/latest-v25.x/api/vm.html#support-of-dynamic-import-in-compilation-apis).
+         * @experimental
+         */
+        importModuleDynamically?:
+            | DynamicModuleLoader<ReturnType<typeof compileFunction>>
+            | typeof constants.USE_MAIN_CONTEXT_DEFAULT_LOADER
+            | undefined;
+    }
+    interface CreateContextOptions {
+        /**
+         * Human-readable name of the newly created context.
+         * @default 'VM Context i' Where i is an ascending numerical index of the created context.
+         */
+        name?: string | undefined;
+        /**
+         * Corresponds to the newly created context for display purposes.
+         * The origin should be formatted like a `URL`, but with only the scheme, host, and port (if necessary),
+         * like the value of the `url.origin` property of a URL object.
+         * Most notably, this string should omit the trailing slash, as that denotes a path.
+         * @default ''
+         */
+        origin?: string | undefined;
+        codeGeneration?:
+            | {
+                /**
+                 * If set to false any calls to eval or function constructors (Function, GeneratorFunction, etc)
+                 * will throw an EvalError.
+                 * @default true
+                 */
+                strings?: boolean | undefined;
+                /**
+                 * If set to false any attempt to compile a WebAssembly module will throw a WebAssembly.CompileError.
+                 * @default true
+                 */
+                wasm?: boolean | undefined;
+            }
+            | undefined;
+        /**
+         * If set to `afterEvaluate`, microtasks will be run immediately after the script has run.
+         */
+        microtaskMode?: "afterEvaluate" | undefined;
+        /**
+         * Used to specify how the modules should be loaded during the evaluation of this script when `import()` is called. This option is
+         * part of the experimental modules API. We do not recommend using it in a production environment. For detailed information, see
+         * [Support of dynamic `import()` in compilation APIs](https://nodejs.org/docs/latest-v25.x/api/vm.html#support-of-dynamic-import-in-compilation-apis).
+         * @experimental
+         */
+        importModuleDynamically?:
+            | DynamicModuleLoader<Context>
+            | typeof constants.USE_MAIN_CONTEXT_DEFAULT_LOADER
+            | undefined;
+    }
+    type MeasureMemoryMode = "summary" | "detailed";
+    interface MeasureMemoryOptions {
+        /**
+         * @default 'summary'
+         */
+        mode?: MeasureMemoryMode | undefined;
+        /**
+         * @default 'default'
+         */
+        execution?: "default" | "eager" | undefined;
+    }
+    interface MemoryMeasurement {
+        total: {
+            jsMemoryEstimate: number;
+            jsMemoryRange: [number, number];
+        };
+    }
+    /**
+     * Instances of the `vm.Script` class contain precompiled scripts that can be
+     * executed in specific contexts.
+     * @since v0.3.1
+     */
+    class Script {
+        constructor(code: string, options?: ScriptOptions | string);
+        /**
+         * Runs the compiled code contained by the `vm.Script` object within the given `contextifiedObject` and returns the result. Running code does not have access
+         * to local scope.
+         *
+         * The following example compiles code that increments a global variable, sets
+         * the value of another global variable, then execute the code multiple times.
+         * The globals are contained in the `context` object.
+         *
+         * ```js
+         * import vm from 'node:vm';
+         *
+         * const context = {
+         *   animal: 'cat',
+         *   count: 2,
+         * };
+         *
+         * const script = new vm.Script('count += 1; name = "kitty";');
+         *
+         * vm.createContext(context);
+         * for (let i = 0; i < 10; ++i) {
+         *   script.runInContext(context);
+         * }
+         *
+         * console.log(context);
+         * // Prints: { animal: 'cat', count: 12, name: 'kitty' }
+         * ```
+         *
+         * Using the `timeout` or `breakOnSigint` options will result in new event loops
+         * and corresponding threads being started, which have a non-zero performance
+         * overhead.
+         * @since v0.3.1
+         * @param contextifiedObject A `contextified` object as returned by the `vm.createContext()` method.
+         * @return the result of the very last statement executed in the script.
+         */
+        runInContext(contextifiedObject: Context, options?: RunningScriptOptions): any;
+        /**
+         * This method is a shortcut to `script.runInContext(vm.createContext(options), options)`.
+         * It does several things at once:
+         *
+         * 1. Creates a new context.
+         * 2. If `contextObject` is an object, contextifies it with the new context.
+         *    If  `contextObject` is undefined, creates a new object and contextifies it.
+         *    If `contextObject` is `vm.constants.DONT_CONTEXTIFY`, don't contextify anything.
+         * 3. Runs the compiled code contained by the `vm.Script` object within the created context. The code
+         *    does not have access to the scope in which this method is called.
+         * 4. Returns the result.
+         *
+         * The following example compiles code that sets a global variable, then executes
+         * the code multiple times in different contexts. The globals are set on and
+         * contained within each individual `context`.
+         *
+         * ```js
+         * const vm = require('node:vm');
+         *
+         * const script = new vm.Script('globalVar = "set"');
+         *
+         * const contexts = [{}, {}, {}];
+         * contexts.forEach((context) => {
+         *   script.runInNewContext(context);
+         * });
+         *
+         * console.log(contexts);
+         * // Prints: [{ globalVar: 'set' }, { globalVar: 'set' }, { globalVar: 'set' }]
+         *
+         * // This would throw if the context is created from a contextified object.
+         * // vm.constants.DONT_CONTEXTIFY allows creating contexts with ordinary
+         * // global objects that can be frozen.
+         * const freezeScript = new vm.Script('Object.freeze(globalThis); globalThis;');
+         * const frozenContext = freezeScript.runInNewContext(vm.constants.DONT_CONTEXTIFY);
+         * ```
+         * @since v0.3.1
+         * @param contextObject Either `vm.constants.DONT_CONTEXTIFY` or an object that will be contextified.
+         * If `undefined`, an empty contextified object will be created for backwards compatibility.
+         * @return the result of the very last statement executed in the script.
+         */
+        runInNewContext(
+            contextObject?: Context | typeof constants.DONT_CONTEXTIFY,
+            options?: RunningScriptInNewContextOptions,
+        ): any;
+        /**
+         * Runs the compiled code contained by the `vm.Script` within the context of the
+         * current `global` object. Running code does not have access to local scope, but _does_ have access to the current `global` object.
+         *
+         * The following example compiles code that increments a `global` variable then
+         * executes that code multiple times:
+         *
+         * ```js
+         * import vm from 'node:vm';
+         *
+         * global.globalVar = 0;
+         *
+         * const script = new vm.Script('globalVar += 1', { filename: 'myfile.vm' });
+         *
+         * for (let i = 0; i < 1000; ++i) {
+         *   script.runInThisContext();
+         * }
+         *
+         * console.log(globalVar);
+         *
+         * // 1000
+         * ```
+         * @since v0.3.1
+         * @return the result of the very last statement executed in the script.
+         */
+        runInThisContext(options?: RunningScriptOptions): any;
+        /**
+         * Creates a code cache that can be used with the `Script` constructor's `cachedData` option. Returns a `Buffer`. This method may be called at any
+         * time and any number of times.
+         *
+         * The code cache of the `Script` doesn't contain any JavaScript observable
+         * states. The code cache is safe to be saved along side the script source and
+         * used to construct new `Script` instances multiple times.
+         *
+         * Functions in the `Script` source can be marked as lazily compiled and they are
+         * not compiled at construction of the `Script`. These functions are going to be
+         * compiled when they are invoked the first time. The code cache serializes the
+         * metadata that V8 currently knows about the `Script` that it can use to speed up
+         * future compilations.
+         *
+         * ```js
+         * const script = new vm.Script(`
+         * function add(a, b) {
+         *   return a + b;
+         * }
+         *
+         * const x = add(1, 2);
+         * `);
+         *
+         * const cacheWithoutAdd = script.createCachedData();
+         * // In `cacheWithoutAdd` the function `add()` is marked for full compilation
+         * // upon invocation.
+         *
+         * script.runInThisContext();
+         *
+         * const cacheWithAdd = script.createCachedData();
+         * // `cacheWithAdd` contains fully compiled function `add()`.
+         * ```
+         * @since v10.6.0
+         */
+        createCachedData(): NonSharedBuffer;
+        /** @deprecated in favor of `script.createCachedData()` */
+        cachedDataProduced?: boolean;
+        /**
+         * When `cachedData` is supplied to create the `vm.Script`, this value will be set
+         * to either `true` or `false` depending on acceptance of the data by V8.
+         * Otherwise the value is `undefined`.
+         * @since v5.7.0
+         */
+        cachedDataRejected?: boolean;
+        cachedData?: NonSharedBuffer;
+        /**
+         * When the script is compiled from a source that contains a source map magic
+         * comment, this property will be set to the URL of the source map.
+         *
+         * ```js
+         * import vm from 'node:vm';
+         *
+         * const script = new vm.Script(`
+         * function myFunc() {}
+         * //# sourceMappingURL=sourcemap.json
+         * `);
+         *
+         * console.log(script.sourceMapURL);
+         * // Prints: sourcemap.json
+         * ```
+         * @since v19.1.0, v18.13.0
+         */
+        sourceMapURL: string | undefined;
+    }
+    /**
+     * If the given `contextObject` is an object, the `vm.createContext()` method will
+     * [prepare that object](https://nodejs.org/docs/latest-v25.x/api/vm.html#what-does-it-mean-to-contextify-an-object)
+     * and return a reference to it so that it can be used in calls to {@link runInContext} or
+     * [`script.runInContext()`](https://nodejs.org/docs/latest-v25.x/api/vm.html#scriptrunincontextcontextifiedobject-options).
+     * Inside such scripts, the global object will be wrapped by the `contextObject`, retaining all of its
+     * existing properties but also having the built-in objects and functions any standard
+     * [global object](https://es5.github.io/#x15.1) has. Outside of scripts run by the vm module, global
+     * variables will remain unchanged.
+     *
+     * ```js
+     * const vm = require('node:vm');
+     *
+     * global.globalVar = 3;
+     *
+     * const context = { globalVar: 1 };
+     * vm.createContext(context);
+     *
+     * vm.runInContext('globalVar *= 2;', context);
+     *
+     * console.log(context);
+     * // Prints: { globalVar: 2 }
+     *
+     * console.log(global.globalVar);
+     * // Prints: 3
+     * ```
+     *
+     * If `contextObject` is omitted (or passed explicitly as `undefined`), a new,
+     * empty contextified object will be returned.
+     *
+     * When the global object in the newly created context is contextified, it has some quirks
+     * compared to ordinary global objects. For example, it cannot be frozen. To create a context
+     * without the contextifying quirks, pass `vm.constants.DONT_CONTEXTIFY` as the `contextObject`
+     * argument. See the documentation of `vm.constants.DONT_CONTEXTIFY` for details.
+     *
+     * The `vm.createContext()` method is primarily useful for creating a single
+     * context that can be used to run multiple scripts. For instance, if emulating a
+     * web browser, the method can be used to create a single context representing a
+     * window's global object, then run all `<script>` tags together within that
+     * context.
+     *
+     * The provided `name` and `origin` of the context are made visible through the
+     * Inspector API.
+     * @since v0.3.1
+     * @param contextObject Either `vm.constants.DONT_CONTEXTIFY` or an object that will be contextified.
+     * If `undefined`, an empty contextified object will be created for backwards compatibility.
+     * @return contextified object.
+     */
+    function createContext(
+        contextObject?: Context | typeof constants.DONT_CONTEXTIFY,
+        options?: CreateContextOptions,
+    ): Context;
+    /**
+     * Returns `true` if the given `object` object has been contextified using {@link createContext},
+     * or if it's the global object of a context created using `vm.constants.DONT_CONTEXTIFY`.
+     * @since v0.11.7
+     */
+    function isContext(sandbox: Context): boolean;
+    /**
+     * The `vm.runInContext()` method compiles `code`, runs it within the context of
+     * the `contextifiedObject`, then returns the result. Running code does not have
+     * access to the local scope. The `contextifiedObject` object _must_ have been
+     * previously `contextified` using the {@link createContext} method.
+     *
+     * If `options` is a string, then it specifies the filename.
+     *
+     * The following example compiles and executes different scripts using a single `contextified` object:
+     *
+     * ```js
+     * import vm from 'node:vm';
+     *
+     * const contextObject = { globalVar: 1 };
+     * vm.createContext(contextObject);
+     *
+     * for (let i = 0; i < 10; ++i) {
+     *   vm.runInContext('globalVar *= 2;', contextObject);
+     * }
+     * console.log(contextObject);
+     * // Prints: { globalVar: 1024 }
+     * ```
+     * @since v0.3.1
+     * @param code The JavaScript code to compile and run.
+     * @param contextifiedObject The `contextified` object that will be used as the `global` when the `code` is compiled and run.
+     * @return the result of the very last statement executed in the script.
+     */
+    function runInContext(code: string, contextifiedObject: Context, options?: RunningCodeOptions | string): any;
+    /**
+     * This method is a shortcut to
+     * `(new vm.Script(code, options)).runInContext(vm.createContext(options), options)`.
+     * If `options` is a string, then it specifies the filename.
+     *
+     * It does several things at once:
+     *
+     * 1. Creates a new context.
+     * 2. If `contextObject` is an object, contextifies it with the new context.
+     *    If  `contextObject` is undefined, creates a new object and contextifies it.
+     *    If `contextObject` is `vm.constants.DONT_CONTEXTIFY`, don't contextify anything.
+     * 3. Compiles the code as a`vm.Script`
+     * 4. Runs the compield code within the created context. The code does not have access to the scope in
+     *    which this method is called.
+     * 5. Returns the result.
+     *
+     * The following example compiles and executes code that increments a global
+     * variable and sets a new one. These globals are contained in the `contextObject`.
+     *
+     * ```js
+     * const vm = require('node:vm');
+     *
+     * const contextObject = {
+     *   animal: 'cat',
+     *   count: 2,
+     * };
+     *
+     * vm.runInNewContext('count += 1; name = "kitty"', contextObject);
+     * console.log(contextObject);
+     * // Prints: { animal: 'cat', count: 3, name: 'kitty' }
+     *
+     * // This would throw if the context is created from a contextified object.
+     * // vm.constants.DONT_CONTEXTIFY allows creating contexts with ordinary global objects that
+     * // can be frozen.
+     * const frozenContext = vm.runInNewContext('Object.freeze(globalThis); globalThis;', vm.constants.DONT_CONTEXTIFY);
+     * ```
+     * @since v0.3.1
+     * @param code The JavaScript code to compile and run.
+     * @param contextObject Either `vm.constants.DONT_CONTEXTIFY` or an object that will be contextified.
+     * If `undefined`, an empty contextified object will be created for backwards compatibility.
+     * @return the result of the very last statement executed in the script.
+     */
+    function runInNewContext(
+        code: string,
+        contextObject?: Context | typeof constants.DONT_CONTEXTIFY,
+        options?: RunningCodeInNewContextOptions | string,
+    ): any;
+    /**
+     * `vm.runInThisContext()` compiles `code`, runs it within the context of the
+     * current `global` and returns the result. Running code does not have access to
+     * local scope, but does have access to the current `global` object.
+     *
+     * If `options` is a string, then it specifies the filename.
+     *
+     * The following example illustrates using both `vm.runInThisContext()` and
+     * the JavaScript [`eval()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval) function to run the same code:
+     *
+     * ```js
+     * import vm from 'node:vm';
+     * let localVar = 'initial value';
+     *
+     * const vmResult = vm.runInThisContext('localVar = "vm";');
+     * console.log(`vmResult: '${vmResult}', localVar: '${localVar}'`);
+     * // Prints: vmResult: 'vm', localVar: 'initial value'
+     *
+     * const evalResult = eval('localVar = "eval";');
+     * console.log(`evalResult: '${evalResult}', localVar: '${localVar}'`);
+     * // Prints: evalResult: 'eval', localVar: 'eval'
+     * ```
+     *
+     * Because `vm.runInThisContext()` does not have access to the local scope, `localVar` is unchanged. In contrast,
+     * [`eval()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval) _does_ have access to the
+     * local scope, so the value `localVar` is changed. In this way `vm.runInThisContext()` is much like an [indirect `eval()` call](https://es5.github.io/#x10.4.2), e.g.`(0,eval)('code')`.
+     *
+     * ## Example: Running an HTTP server within a VM
+     *
+     * When using either `script.runInThisContext()` or {@link runInThisContext}, the code is executed within the current V8 global
+     * context. The code passed to this VM context will have its own isolated scope.
+     *
+     * In order to run a simple web server using the `node:http` module the code passed
+     * to the context must either import `node:http` on its own, or have a
+     * reference to the `node:http` module passed to it. For instance:
+     *
+     * ```js
+     * 'use strict';
+     * import vm from 'node:vm';
+     *
+     * const code = `
+     * ((require) => {
+     * const http = require('node:http');
+     *
+     *   http.createServer((request, response) => {
+     *     response.writeHead(200, { 'Content-Type': 'text/plain' });
+     *     response.end('Hello World\\n');
+     *   }).listen(8124);
+     *
+     *   console.log('Server running at http://127.0.0.1:8124/');
+     * })`;
+     *
+     * vm.runInThisContext(code)(require);
+     * ```
+     *
+     * The `require()` in the above case shares the state with the context it is
+     * passed from. This may introduce risks when untrusted code is executed, e.g.
+     * altering objects in the context in unwanted ways.
+     * @since v0.3.1
+     * @param code The JavaScript code to compile and run.
+     * @return the result of the very last statement executed in the script.
+     */
+    function runInThisContext(code: string, options?: RunningCodeOptions | string): any;
+    /**
+     * Compiles the given code into the provided context (if no context is
+     * supplied, the current context is used), and returns it wrapped inside a
+     * function with the given `params`.
+     * @since v10.10.0
+     * @param code The body of the function to compile.
+     * @param params An array of strings containing all parameters for the function.
+     */
+    function compileFunction(
+        code: string,
+        params?: readonly string[],
+        options?: CompileFunctionOptions,
+    ): Function & Pick<Script, "cachedData" | "cachedDataProduced" | "cachedDataRejected">;
+    /**
+     * Measure the memory known to V8 and used by all contexts known to the
+     * current V8 isolate, or the main context.
+     *
+     * The format of the object that the returned Promise may resolve with is
+     * specific to the V8 engine and may change from one version of V8 to the next.
+     *
+     * The returned result is different from the statistics returned by `v8.getHeapSpaceStatistics()` in that `vm.measureMemory()` measure the
+     * memory reachable by each V8 specific contexts in the current instance of
+     * the V8 engine, while the result of `v8.getHeapSpaceStatistics()` measure
+     * the memory occupied by each heap space in the current V8 instance.
+     *
+     * ```js
+     * import vm from 'node:vm';
+     * // Measure the memory used by the main context.
+     * vm.measureMemory({ mode: 'summary' })
+     *   // This is the same as vm.measureMemory()
+     *   .then((result) => {
+     *     // The current format is:
+     *     // {
+     *     //   total: {
+     *     //      jsMemoryEstimate: 2418479, jsMemoryRange: [ 2418479, 2745799 ]
+     *     //    }
+     *     // }
+     *     console.log(result);
+     *   });
+     *
+     * const context = vm.createContext({ a: 1 });
+     * vm.measureMemory({ mode: 'detailed', execution: 'eager' })
+     *   .then((result) => {
+     *     // Reference the context here so that it won't be GC'ed
+     *     // until the measurement is complete.
+     *     console.log(context.a);
+     *     // {
+     *     //   total: {
+     *     //     jsMemoryEstimate: 2574732,
+     *     //     jsMemoryRange: [ 2574732, 2904372 ]
+     *     //   },
+     *     //   current: {
+     *     //     jsMemoryEstimate: 2438996,
+     *     //     jsMemoryRange: [ 2438996, 2768636 ]
+     *     //   },
+     *     //   other: [
+     *     //     {
+     *     //       jsMemoryEstimate: 135736,
+     *     //       jsMemoryRange: [ 135736, 465376 ]
+     *     //     }
+     *     //   ]
+     *     // }
+     *     console.log(result);
+     *   });
+     * ```
+     * @since v13.10.0
+     * @experimental
+     */
+    function measureMemory(options?: MeasureMemoryOptions): Promise<MemoryMeasurement>;
+    interface ModuleEvaluateOptions extends Pick<RunningScriptOptions, "breakOnSigint" | "timeout"> {}
+    type ModuleLinker = (
+        specifier: string,
+        referencingModule: Module,
+        extra: {
+            attributes: ImportAttributes;
+        },
+    ) => Module | Promise<Module>;
+    type ModuleStatus = "unlinked" | "linking" | "linked" | "evaluating" | "evaluated" | "errored";
+    /**
+     * This feature is only available with the `--experimental-vm-modules` command
+     * flag enabled.
+     *
+     * The `vm.Module` class provides a low-level interface for using
+     * ECMAScript modules in VM contexts. It is the counterpart of the `vm.Script`
+     * class that closely mirrors [Module Record](https://tc39.es/ecma262/#sec-abstract-module-records)s as defined in the ECMAScript
+     * specification.
+     *
+     * Unlike `vm.Script` however, every `vm.Module` object is bound to a context from
+     * its creation.
+     *
+     * Using a `vm.Module` object requires three distinct steps: creation/parsing,
+     * linking, and evaluation. These three steps are illustrated in the following
+     * example.
+     *
+     * This implementation lies at a lower level than the `ECMAScript Module
+     * loader`. There is also no way to interact with the Loader yet, though
+     * support is planned.
+     *
+     * ```js
+     * import vm from 'node:vm';
+     *
+     * const contextifiedObject = vm.createContext({
+     *   secret: 42,
+     *   print: console.log,
+     * });
+     *
+     * // Step 1
+     * //
+     * // Create a Module by constructing a new `vm.SourceTextModule` object. This
+     * // parses the provided source text, throwing a `SyntaxError` if anything goes
+     * // wrong. By default, a Module is created in the top context. But here, we
+     * // specify `contextifiedObject` as the context this Module belongs to.
+     * //
+     * // Here, we attempt to obtain the default export from the module "foo", and
+     * // put it into local binding "secret".
+     *
+     * const rootModule = new vm.SourceTextModule(`
+     *   import s from 'foo';
+     *   s;
+     *   print(s);
+     * `, { context: contextifiedObject });
+     *
+     * // Step 2
+     * //
+     * // "Link" the imported dependencies of this Module to it.
+     * //
+     * // Obtain the requested dependencies of a SourceTextModule by
+     * // `sourceTextModule.moduleRequests` and resolve them.
+     * //
+     * // Even top-level Modules without dependencies must be explicitly linked. The
+     * // array passed to `sourceTextModule.linkRequests(modules)` can be
+     * // empty, however.
+     * //
+     * // Note: This is a contrived example in that the resolveAndLinkDependencies
+     * // creates a new "foo" module every time it is called. In a full-fledged
+     * // module system, a cache would probably be used to avoid duplicated modules.
+     *
+     * const moduleMap = new Map([
+     *   ['root', rootModule],
+     * ]);
+     *
+     * function resolveAndLinkDependencies(module) {
+     *   const requestedModules = module.moduleRequests.map((request) => {
+     *     // In a full-fledged module system, the resolveAndLinkDependencies would
+     *     // resolve the module with the module cache key `[specifier, attributes]`.
+     *     // In this example, we just use the specifier as the key.
+     *     const specifier = request.specifier;
+     *
+     *     let requestedModule = moduleMap.get(specifier);
+     *     if (requestedModule === undefined) {
+     *       requestedModule = new vm.SourceTextModule(`
+     *         // The "secret" variable refers to the global variable we added to
+     *         // "contextifiedObject" when creating the context.
+     *         export default secret;
+     *       `, { context: referencingModule.context });
+     *       moduleMap.set(specifier, requestedModule);
+     *       // Resolve the dependencies of the new module as well.
+     *       resolveAndLinkDependencies(requestedModule);
+     *     }
+     *
+     *     return requestedModule;
+     *   });
+     *
+     *   module.linkRequests(requestedModules);
+     * }
+     *
+     * resolveAndLinkDependencies(rootModule);
+     * rootModule.instantiate();
+     *
+     * // Step 3
+     * //
+     * // Evaluate the Module. The evaluate() method returns a promise which will
+     * // resolve after the module has finished evaluating.
+     *
+     * // Prints 42.
+     * await rootModule.evaluate();
+     * ```
+     * @since v13.0.0, v12.16.0
+     * @experimental
+     */
+    class Module {
+        /**
+         * If the `module.status` is `'errored'`, this property contains the exception
+         * thrown by the module during evaluation. If the status is anything else,
+         * accessing this property will result in a thrown exception.
+         *
+         * The value `undefined` cannot be used for cases where there is not a thrown
+         * exception due to possible ambiguity with `throw undefined;`.
+         *
+         * Corresponds to the `[[EvaluationError]]` field of [Cyclic Module Record](https://tc39.es/ecma262/#sec-cyclic-module-records) s
+         * in the ECMAScript specification.
+         */
+        error: any;
+        /**
+         * The identifier of the current module, as set in the constructor.
+         */
+        identifier: string;
+        context: Context;
+        /**
+         * The namespace object of the module. This is only available after linking
+         * (`module.link()`) has completed.
+         *
+         * Corresponds to the [GetModuleNamespace](https://tc39.es/ecma262/#sec-getmodulenamespace) abstract operation in the ECMAScript
+         * specification.
+         */
+        namespace: Object;
+        /**
+         * The current status of the module. Will be one of:
+         *
+         * * `'unlinked'`: `module.link()` has not yet been called.
+         * * `'linking'`: `module.link()` has been called, but not all Promises returned
+         * by the linker function have been resolved yet.
+         * * `'linked'`: The module has been linked successfully, and all of its
+         * dependencies are linked, but `module.evaluate()` has not yet been called.
+         * * `'evaluating'`: The module is being evaluated through a `module.evaluate()` on
+         * itself or a parent module.
+         * * `'evaluated'`: The module has been successfully evaluated.
+         * * `'errored'`: The module has been evaluated, but an exception was thrown.
+         *
+         * Other than `'errored'`, this status string corresponds to the specification's [Cyclic Module Record](https://tc39.es/ecma262/#sec-cyclic-module-records)'s `[[Status]]` field. `'errored'`
+         * corresponds to `'evaluated'` in the specification, but with `[[EvaluationError]]` set to a
+         * value that is not `undefined`.
+         */
+        status: ModuleStatus;
+        /**
+         * Evaluate the module and its depenendencies. Corresponds to the [Evaluate() concrete method](https://tc39.es/ecma262/#sec-moduleevaluation) field of
+         * [Cyclic Module Record](https://tc39.es/ecma262/#sec-cyclic-module-records)s in the ECMAScript specification.
+         *
+         * If the module is a `vm.SourceTextModule`, `evaluate()` must be called after the module has been instantiated;
+         * otherwise `evaluate()` will return a rejected promise.
+         *
+         * For a `vm.SourceTextModule`, the promise returned by `evaluate()` may be fulfilled either
+         * synchronously or asynchronously:
+         *
+         * 1. If the `vm.SourceTextModule` has no top-level `await` in itself or any of its dependencies, the promise will be
+         *    fulfilled _synchronously_ after the module and all its dependencies have been evaluated.
+         *    1. If the evaluation succeeds, the promise will be _synchronously_ resolved to `undefined`.
+         *    2. If the evaluation results in an exception, the promise will be _synchronously_ rejected with the exception
+         *       that causes the evaluation to fail, which is the same as `module.error`.
+         * 2. If the `vm.SourceTextModule` has top-level `await` in itself or any of its dependencies, the promise will be
+         *    fulfilled _asynchronously_ after the module and all its dependencies have been evaluated.
+         *    1. If the evaluation succeeds, the promise will be _asynchronously_ resolved to `undefined`.
+         *    2. If the evaluation results in an exception, the promise will be _asynchronously_ rejected with the exception
+         *       that causes the evaluation to fail.
+         *
+         * If the module is a `vm.SyntheticModule`, `evaluate()` always returns a promise that fulfills synchronously, see
+         * the specification of [Evaluate() of a Synthetic Module Record](https://tc39.es/ecma262/#sec-smr-Evaluate):
+         *
+         * 1. If the `evaluateCallback` passed to its constructor throws an exception synchronously, `evaluate()` returns
+         *    a promise that will be synchronously rejected with that exception.
+         * 2. If the `evaluateCallback` does not throw an exception, `evaluate()` returns a promise that will be
+         *    synchronously resolved to `undefined`.
+         *
+         * The `evaluateCallback` of a `vm.SyntheticModule` is executed synchronously within the `evaluate()` call, and its
+         * return value is discarded. This means if `evaluateCallback` is an asynchronous function, the promise returned by
+         * `evaluate()` will not reflect its asynchronous behavior, and any rejections from an asynchronous
+         * `evaluateCallback` will be lost.
+         *
+         * `evaluate()` could also be called again after the module has already been evaluated, in which case:
+         *
+         * 1. If the initial evaluation ended in success (`module.status` is `'evaluated'`), it will do nothing
+         *    and return a promise that resolves to `undefined`.
+         * 2. If the initial evaluation resulted in an exception (`module.status` is `'errored'`), it will re-reject
+         *    the exception that the initial evaluation resulted in.
+         *
+         * This method cannot be called while the module is being evaluated (`module.status` is `'evaluating'`).
+         * @return Fulfills with `undefined` upon success.
+         */
+        evaluate(options?: ModuleEvaluateOptions): Promise<void>;
+        /**
+         * Link module dependencies. This method must be called before evaluation, and
+         * can only be called once per module.
+         *
+         * Use `sourceTextModule.linkRequests(modules)` and
+         * `sourceTextModule.instantiate()` to link modules either synchronously or
+         * asynchronously.
+         *
+         * The function is expected to return a `Module` object or a `Promise` that
+         * eventually resolves to a `Module` object. The returned `Module` must satisfy the
+         * following two invariants:
+         *
+         * * It must belong to the same context as the parent `Module`.
+         * * Its `status` must not be `'errored'`.
+         *
+         * If the returned `Module`'s `status` is `'unlinked'`, this method will be
+         * recursively called on the returned `Module` with the same provided `linker` function.
+         *
+         * `link()` returns a `Promise` that will either get resolved when all linking
+         * instances resolve to a valid `Module`, or rejected if the linker function either
+         * throws an exception or returns an invalid `Module`.
+         *
+         * The linker function roughly corresponds to the implementation-defined [HostResolveImportedModule](https://tc39.es/ecma262/#sec-hostresolveimportedmodule) abstract operation in the
+         * ECMAScript
+         * specification, with a few key differences:
+         *
+         * * The linker function is allowed to be asynchronous while [HostResolveImportedModule](https://tc39.es/ecma262/#sec-hostresolveimportedmodule) is synchronous.
+         *
+         * The actual [HostResolveImportedModule](https://tc39.es/ecma262/#sec-hostresolveimportedmodule) implementation used during module
+         * linking is one that returns the modules linked during linking. Since at
+         * that point all modules would have been fully linked already, the [HostResolveImportedModule](https://tc39.es/ecma262/#sec-hostresolveimportedmodule) implementation is fully synchronous per
+         * specification.
+         *
+         * Corresponds to the [Link() concrete method](https://tc39.es/ecma262/#sec-moduledeclarationlinking) field of [Cyclic Module Record](https://tc39.es/ecma262/#sec-cyclic-module-records) s in
+         * the ECMAScript specification.
+         */
+        link(linker: ModuleLinker): Promise<void>;
+    }
+    interface SourceTextModuleOptions extends Pick<ScriptOptions, "cachedData" | "columnOffset" | "lineOffset"> {
+        /**
+         * String used in stack traces.
+         * @default 'vm:module(i)' where i is a context-specific ascending index.
+         */
+        identifier?: string | undefined;
+        context?: Context | undefined;
+        /**
+         * Called during evaluation of this module to initialize the `import.meta`.
+         */
+        initializeImportMeta?: ((meta: ImportMeta, module: SourceTextModule) => void) | undefined;
+        /**
+         * Used to specify how the modules should be loaded during the evaluation of this script when `import()` is called. This option is
+         * part of the experimental modules API. We do not recommend using it in a production environment. For detailed information, see
+         * [Support of dynamic `import()` in compilation APIs](https://nodejs.org/docs/latest-v25.x/api/vm.html#support-of-dynamic-import-in-compilation-apis).
+         * @experimental
+         */
+        importModuleDynamically?: DynamicModuleLoader<SourceTextModule> | undefined;
+    }
+    /**
+     * A `ModuleRequest` represents the request to import a module with given import attributes and phase.
+     * @since 24.4.0
+     */
+    interface ModuleRequest {
+        /**
+         * The specifier of the requested module.
+         */
+        specifier: string;
+        /**
+         * The `"with"` value passed to the `WithClause` in a `ImportDeclaration`, or an empty object if no value was
+         * provided.
+         */
+        attributes: ImportAttributes;
+        /**
+         * The phase of the requested module (`"source"` or `"evaluation"`).
+         */
+        phase: ImportPhase;
+    }
+    /**
+     * This feature is only available with the `--experimental-vm-modules` command
+     * flag enabled.
+     *
+     * The `vm.SourceTextModule` class provides the [Source Text Module Record](https://tc39.es/ecma262/#sec-source-text-module-records) as
+     * defined in the ECMAScript specification.
+     * @since v9.6.0
+     * @experimental
+     */
+    class SourceTextModule extends Module {
+        /**
+         * Creates a new `SourceTextModule` instance.
+         *
+         * Properties assigned to the `import.meta` object that are objects may
+         * allow the module to access information outside the specified `context`. Use
+         * `vm.runInContext()` to create objects in a specific context.
+         *
+         * ```js
+         * import vm from 'node:vm';
+         *
+         * const contextifiedObject = vm.createContext({ secret: 42 });
+         *
+         * const module = new vm.SourceTextModule(
+         *   'Object.getPrototypeOf(import.meta.prop).secret = secret;',
+         *   {
+         *     initializeImportMeta(meta) {
+         *       // Note: this object is created in the top context. As such,
+         *       // Object.getPrototypeOf(import.meta.prop) points to the
+         *       // Object.prototype in the top context rather than that in
+         *       // the contextified object.
+         *       meta.prop = {};
+         *     },
+         *   });
+         * // The module has an empty `moduleRequests` array.
+         * module.linkRequests([]);
+         * module.instantiate();
+         * await module.evaluate();
+         *
+         * // Now, Object.prototype.secret will be equal to 42.
+         * //
+         * // To fix this problem, replace
+         * //     meta.prop = {};
+         * // above with
+         * //     meta.prop = vm.runInContext('{}', contextifiedObject);
+         * ```
+         * @param code JavaScript Module code to parse
+         */
+        constructor(code: string, options?: SourceTextModuleOptions);
+        /**
+         * @deprecated Use `sourceTextModule.moduleRequests` instead.
+         */
+        readonly dependencySpecifiers: readonly string[];
+        /**
+         * Iterates over the dependency graph and returns `true` if any module in its
+         * dependencies or this module itself contains top-level `await` expressions,
+         * otherwise returns `false`.
+         *
+         * The search may be slow if the graph is big enough.
+         *
+         * This requires the module to be instantiated first. If the module is not
+         * instantiated yet, an error will be thrown.
+         * @since v24.9.0
+         */
+        hasAsyncGraph(): boolean;
+        /**
+         * Returns whether the module itself contains any top-level `await` expressions.
+         *
+         * This corresponds to the field `[[HasTLA]]` in [Cyclic Module Record](https://tc39.es/ecma262/#sec-cyclic-module-records) in the
+         * ECMAScript specification.
+         * @since v24.9.0
+         */
+        hasTopLevelAwait(): boolean;
+        /**
+         * Instantiate the module with the linked requested modules.
+         *
+         * This resolves the imported bindings of the module, including re-exported
+         * binding names. When there are any bindings that cannot be resolved,
+         * an error would be thrown synchronously.
+         *
+         * If the requested modules include cyclic dependencies, the
+         * `sourceTextModule.linkRequests(modules)` method must be called on all
+         * modules in the cycle before calling this method.
+         * @since v24.8.0
+         */
+        instantiate(): void;
+        /**
+         * Link module dependencies. This method must be called before evaluation, and
+         * can only be called once per module.
+         *
+         * The order of the module instances in the `modules` array should correspond to the order of
+         * `sourceTextModule.moduleRequests` being resolved. If two module requests have the same
+         * specifier and import attributes, they must be resolved with the same module instance or an
+         * `ERR_MODULE_LINK_MISMATCH` would be thrown. For example, when linking requests for this
+         * module:
+         *
+         * ```js
+         * import foo from 'foo';
+         * import source Foo from 'foo';
+         * ```
+         *
+         * The `modules` array must contain two references to the same instance, because the two
+         * module requests are identical but in two phases.
+         *
+         * If the module has no dependencies, the `modules` array can be empty.
+         *
+         * Users can use `sourceTextModule.moduleRequests` to implement the host-defined
+         * [HostLoadImportedModule](https://tc39.es/ecma262/#sec-HostLoadImportedModule) abstract operation in the ECMAScript specification,
+         * and using `sourceTextModule.linkRequests()` to invoke specification defined
+         * [FinishLoadingImportedModule](https://tc39.es/ecma262/#sec-FinishLoadingImportedModule), on the module with all dependencies in a batch.
+         *
+         * It's up to the creator of the `SourceTextModule` to determine if the resolution
+         * of the dependencies is synchronous or asynchronous.
+         *
+         * After each module in the `modules` array is linked, call
+         * `sourceTextModule.instantiate()`.
+         * @since v24.8.0
+         * @param modules Array of `vm.Module` objects that this module depends on.
+         * The order of the modules in the array is the order of
+         * `sourceTextModule.moduleRequests`.
+         */
+        linkRequests(modules: readonly Module[]): void;
+        /**
+         * The requested import dependencies of this module. The returned array is frozen
+         * to disallow any changes to it.
+         *
+         * For example, given a source text:
+         *
+         * ```js
+         * import foo from 'foo';
+         * import fooAlias from 'foo';
+         * import bar from './bar.js';
+         * import withAttrs from '../with-attrs.ts' with { arbitraryAttr: 'attr-val' };
+         * import source Module from 'wasm-mod.wasm';
+         * ```
+         *
+         * The value of the `sourceTextModule.moduleRequests` will be:
+         *
+         * ```js
+         * [
+         *   {
+         *     specifier: 'foo',
+         *     attributes: {},
+         *     phase: 'evaluation',
+         *   },
+         *   {
+         *     specifier: 'foo',
+         *     attributes: {},
+         *     phase: 'evaluation',
+         *   },
+         *   {
+         *     specifier: './bar.js',
+         *     attributes: {},
+         *     phase: 'evaluation',
+         *   },
+         *   {
+         *     specifier: '../with-attrs.ts',
+         *     attributes: { arbitraryAttr: 'attr-val' },
+         *     phase: 'evaluation',
+         *   },
+         *   {
+         *     specifier: 'wasm-mod.wasm',
+         *     attributes: {},
+         *     phase: 'source',
+         *   },
+         * ];
+         * ```
+         * @since v24.4.0
+         */
+        readonly moduleRequests: readonly ModuleRequest[];
+    }
+    interface SyntheticModuleOptions {
+        /**
+         * String used in stack traces.
+         * @default 'vm:module(i)' where i is a context-specific ascending index.
+         */
+        identifier?: string | undefined;
+        /**
+         * The contextified object as returned by the `vm.createContext()` method, to compile and evaluate this module in.
+         */
+        context?: Context | undefined;
+    }
+    /**
+     * This feature is only available with the `--experimental-vm-modules` command
+     * flag enabled.
+     *
+     * The `vm.SyntheticModule` class provides the [Synthetic Module Record](https://heycam.github.io/webidl/#synthetic-module-records) as
+     * defined in the WebIDL specification. The purpose of synthetic modules is to
+     * provide a generic interface for exposing non-JavaScript sources to ECMAScript
+     * module graphs.
+     *
+     * ```js
+     * import vm from 'node:vm';
+     *
+     * const source = '{ "a": 1 }';
+     * const module = new vm.SyntheticModule(['default'], function() {
+     *   const obj = JSON.parse(source);
+     *   this.setExport('default', obj);
+     * });
+     *
+     * // Use `module` in linking...
+     * ```
+     * @since v13.0.0, v12.16.0
+     * @experimental
+     */
+    class SyntheticModule extends Module {
+        /**
+         * Creates a new `SyntheticModule` instance.
+         * @param exportNames Array of names that will be exported from the module.
+         * @param evaluateCallback Called when the module is evaluated.
+         */
+        constructor(
+            exportNames: string[],
+            evaluateCallback: (this: SyntheticModule) => void,
+            options?: SyntheticModuleOptions,
+        );
+        /**
+         * This method sets the module export binding slots with the given value.
+         *
+         * ```js
+         * import vm from 'node:vm';
+         *
+         * const m = new vm.SyntheticModule(['x'], () => {
+         *   m.setExport('x', 1);
+         * });
+         *
+         * await m.evaluate();
+         *
+         * assert.strictEqual(m.namespace.x, 1);
+         * ```
+         * @since v13.0.0, v12.16.0
+         * @param name Name of the export to set.
+         * @param value The value to set the export to.
+         */
+        setExport(name: string, value: any): void;
+    }
+    /**
+     * Returns an object containing commonly used constants for VM operations.
+     * @since v21.7.0, v20.12.0
+     */
+    namespace constants {
+        /**
+         * A constant that can be used as the `importModuleDynamically` option to `vm.Script`
+         * and `vm.compileFunction()` so that Node.js uses the default ESM loader from the main
+         * context to load the requested module.
+         *
+         * For detailed information, see [Support of dynamic `import()` in compilation APIs](https://nodejs.org/docs/latest-v25.x/api/vm.html#support-of-dynamic-import-in-compilation-apis).
+         * @since v21.7.0, v20.12.0
+         */
+        const USE_MAIN_CONTEXT_DEFAULT_LOADER: number;
+        /**
+         * This constant, when used as the `contextObject` argument in vm APIs, instructs Node.js to create
+         * a context without wrapping its global object with another object in a Node.js-specific manner.
+         * As a result, the `globalThis` value inside the new context would behave more closely to an ordinary
+         * one.
+         *
+         * When `vm.constants.DONT_CONTEXTIFY` is used as the `contextObject` argument to {@link createContext},
+         * the returned object is a proxy-like object to the global object in the newly created context with
+         * fewer Node.js-specific quirks. It is reference equal to the `globalThis` value in the new context,
+         * can be modified from outside the context, and can be used to access built-ins in the new context directly.
+         * @since v22.8.0
+         */
+        const DONT_CONTEXTIFY: number;
+    }
+}
+declare module "vm" {
+    export * from "node:vm";
+}
diff --git a/mqtt-backend/node_modules/@types/node/wasi.d.ts b/mqtt-backend/node_modules/@types/node/wasi.d.ts
new file mode 100644
index 0000000..a0d56cf
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/wasi.d.ts
@@ -0,0 +1,131 @@
+declare module "node:wasi" {
+    interface WASIOptions {
+        /**
+         * An array of strings that the WebAssembly application will
+         * see as command line arguments. The first argument is the virtual path to the
+         * WASI command itself.
+         * @default []
+         */
+        args?: readonly string[] | undefined;
+        /**
+         * An object similar to `process.env` that the WebAssembly
+         * application will see as its environment.
+         * @default {}
+         */
+        env?: object | undefined;
+        /**
+         * This object represents the WebAssembly application's
+         * sandbox directory structure. The string keys of `preopens` are treated as
+         * directories within the sandbox. The corresponding values in `preopens` are
+         * the real paths to those directories on the host machine.
+         */
+        preopens?: NodeJS.Dict<string> | undefined;
+        /**
+         * By default, when WASI applications call `__wasi_proc_exit()`
+         * `wasi.start()` will return with the exit code specified rather than terminatng the process.
+         * Setting this option to `false` will cause the Node.js process to exit with
+         * the specified exit code instead.
+         * @default true
+         */
+        returnOnExit?: boolean | undefined;
+        /**
+         * The file descriptor used as standard input in the WebAssembly application.
+         * @default 0
+         */
+        stdin?: number | undefined;
+        /**
+         * The file descriptor used as standard output in the WebAssembly application.
+         * @default 1
+         */
+        stdout?: number | undefined;
+        /**
+         * The file descriptor used as standard error in the WebAssembly application.
+         * @default 2
+         */
+        stderr?: number | undefined;
+        /**
+         * The version of WASI requested.
+         * Currently the only supported versions are `'unstable'` and `'preview1'`. This option is mandatory.
+         * @since v19.8.0
+         */
+        version: "unstable" | "preview1";
+    }
+    interface FinalizeBindingsOptions {
+        /**
+         * @default instance.exports.memory
+         */
+        memory?: object | undefined;
+    }
+    /**
+     * The `WASI` class provides the WASI system call API and additional convenience
+     * methods for working with WASI-based applications. Each `WASI` instance
+     * represents a distinct environment.
+     * @since v13.3.0, v12.16.0
+     */
+    class WASI {
+        constructor(options?: WASIOptions);
+        /**
+         * Return an import object that can be passed to `WebAssembly.instantiate()` if no other WASM imports are needed beyond those provided by WASI.
+         *
+         * If version `unstable` was passed into the constructor it will return:
+         *
+         * ```js
+         * { wasi_unstable: wasi.wasiImport }
+         * ```
+         *
+         * If version `preview1` was passed into the constructor or no version was specified it will return:
+         *
+         * ```js
+         * { wasi_snapshot_preview1: wasi.wasiImport }
+         * ```
+         * @since v19.8.0
+         */
+        getImportObject(): object;
+        /**
+         * Attempt to begin execution of `instance` as a WASI command by invoking its `_start()` export. If `instance` does not contain a `_start()` export, or if `instance` contains an `_initialize()`
+         * export, then an exception is thrown.
+         *
+         * `start()` requires that `instance` exports a [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) named `memory`. If
+         * `instance` does not have a `memory` export an exception is thrown.
+         *
+         * If `start()` is called more than once, an exception is thrown.
+         * @since v13.3.0, v12.16.0
+         */
+        start(instance: object): number; // TODO: avoid DOM dependency until WASM moved to own lib.
+        /**
+         * Attempt to initialize `instance` as a WASI reactor by invoking its `_initialize()` export, if it is present. If `instance` contains a `_start()` export, then an exception is thrown.
+         *
+         * `initialize()` requires that `instance` exports a [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) named `memory`.
+         * If `instance` does not have a `memory` export an exception is thrown.
+         *
+         * If `initialize()` is called more than once, an exception is thrown.
+         * @since v14.6.0, v12.19.0
+         */
+        initialize(instance: object): void; // TODO: avoid DOM dependency until WASM moved to own lib.
+        /**
+         * Set up WASI host bindings to `instance` without calling `initialize()`
+         * or `start()`. This method is useful when the WASI module is instantiated in
+         * child threads for sharing the memory across threads.
+         *
+         * `finalizeBindings()` requires that either `instance` exports a
+         * [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) named `memory` or user specify a
+         * [`WebAssembly.Memory`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Memory) object in `options.memory`. If the `memory` is invalid
+         * an exception is thrown.
+         *
+         * `start()` and `initialize()` will call `finalizeBindings()` internally.
+         * If `finalizeBindings()` is called more than once, an exception is thrown.
+         * @since v24.4.0
+         */
+        finalizeBindings(instance: object, options?: FinalizeBindingsOptions): void;
+        /**
+         * `wasiImport` is an object that implements the WASI system call API. This object
+         * should be passed as the `wasi_snapshot_preview1` import during the instantiation
+         * of a [`WebAssembly.Instance`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/Instance).
+         * @since v13.3.0, v12.16.0
+         */
+        readonly wasiImport: NodeJS.Dict<any>; // TODO: Narrow to DOM types
+    }
+}
+declare module "wasi" {
+    export * from "node:wasi";
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/abortcontroller.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/abortcontroller.d.ts
new file mode 100644
index 0000000..ad753c1
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/abortcontroller.d.ts
@@ -0,0 +1,59 @@
+export {};
+
+import { InternalEventTargetEventProperties } from "node:events";
+
+type _AbortController = typeof globalThis extends { onmessage: any } ? {} : AbortController;
+interface AbortController {
+    readonly signal: AbortSignal;
+    abort(reason?: any): void;
+}
+
+interface AbortSignalEventMap {
+    "abort": Event;
+}
+
+type _AbortSignal = typeof globalThis extends { onmessage: any } ? {} : AbortSignal;
+interface AbortSignal extends EventTarget, InternalEventTargetEventProperties<AbortSignalEventMap> {
+    readonly aborted: boolean;
+    readonly reason: any;
+    throwIfAborted(): void;
+    addEventListener<K extends keyof AbortSignalEventMap>(
+        type: K,
+        listener: (ev: AbortSignalEventMap[K]) => void,
+        options?: AddEventListenerOptions | boolean,
+    ): void;
+    addEventListener(
+        type: string,
+        listener: EventListener | EventListenerObject,
+        options?: AddEventListenerOptions | boolean,
+    ): void;
+    removeEventListener<K extends keyof AbortSignalEventMap>(
+        type: K,
+        listener: (ev: AbortSignalEventMap[K]) => void,
+        options?: EventListenerOptions | boolean,
+    ): void;
+    removeEventListener(
+        type: string,
+        listener: EventListener | EventListenerObject,
+        options?: EventListenerOptions | boolean,
+    ): void;
+}
+
+declare global {
+    interface AbortController extends _AbortController {}
+    var AbortController: typeof globalThis extends { onmessage: any; AbortController: infer T } ? T
+        : {
+            prototype: AbortController;
+            new(): AbortController;
+        };
+
+    interface AbortSignal extends _AbortSignal {}
+    var AbortSignal: typeof globalThis extends { onmessage: any; AbortSignal: infer T } ? T
+        : {
+            prototype: AbortSignal;
+            new(): AbortSignal;
+            abort(reason?: any): AbortSignal;
+            any(signals: AbortSignal[]): AbortSignal;
+            timeout(milliseconds: number): AbortSignal;
+        };
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/blob.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/blob.d.ts
new file mode 100644
index 0000000..04ff440
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/blob.d.ts
@@ -0,0 +1,23 @@
+export {};
+
+import * as buffer from "node:buffer";
+
+type _Blob = typeof globalThis extends { onmessage: any } ? {} : buffer.Blob;
+type _BlobPropertyBag = typeof globalThis extends { onmessage: any } ? {} : buffer.BlobPropertyBag;
+type _File = typeof globalThis extends { onmessage: any } ? {} : buffer.File;
+type _FilePropertyBag = typeof globalThis extends { onmessage: any } ? {} : buffer.FilePropertyBag;
+
+declare global {
+    interface Blob extends _Blob {}
+    var Blob: typeof globalThis extends { onmessage: any; Blob: infer T } ? T : typeof buffer.Blob;
+
+    interface BlobPropertyBag extends _BlobPropertyBag {}
+
+    interface File extends _File {}
+    var File: typeof globalThis extends { onmessage: any; File: infer T } ? T : typeof buffer.File;
+
+    interface FilePropertyBag extends _FilePropertyBag {}
+
+    function atob(data: string): string;
+    function btoa(data: string): string;
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/console.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/console.d.ts
new file mode 100644
index 0000000..5492de3
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/console.d.ts
@@ -0,0 +1,9 @@
+export {};
+
+import * as console from "node:console";
+
+declare global {
+    interface Console extends console.Console {}
+
+    var console: Console;
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/crypto.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/crypto.d.ts
new file mode 100644
index 0000000..f038a43
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/crypto.d.ts
@@ -0,0 +1,39 @@
+export {};
+
+import { webcrypto } from "crypto";
+
+type _Crypto = typeof globalThis extends { onmessage: any } ? {} : webcrypto.Crypto;
+type _CryptoKey = typeof globalThis extends { onmessage: any } ? {} : webcrypto.CryptoKey;
+type _SubtleCrypto = typeof globalThis extends { onmessage: any } ? {} : webcrypto.SubtleCrypto;
+
+declare global {
+    interface Crypto extends _Crypto {}
+    var Crypto: typeof globalThis extends { onmessage: any; Crypto: infer T } ? T : {
+        prototype: webcrypto.Crypto;
+        new(): webcrypto.Crypto;
+    };
+
+    interface CryptoKey extends _CryptoKey {}
+    var CryptoKey: typeof globalThis extends { onmessage: any; CryptoKey: infer T } ? T : {
+        prototype: webcrypto.CryptoKey;
+        new(): webcrypto.CryptoKey;
+    };
+
+    interface SubtleCrypto extends _SubtleCrypto {}
+    var SubtleCrypto: typeof globalThis extends { onmessage: any; SubtleCrypto: infer T } ? T : {
+        prototype: webcrypto.SubtleCrypto;
+        new(): webcrypto.SubtleCrypto;
+        supports(
+            operation: string,
+            algorithm: webcrypto.AlgorithmIdentifier,
+            length?: number,
+        ): boolean;
+        supports(
+            operation: string,
+            algorithm: webcrypto.AlgorithmIdentifier,
+            additionalAlgorithm: webcrypto.AlgorithmIdentifier,
+        ): boolean;
+    };
+
+    var crypto: typeof globalThis extends { onmessage: any; crypto: infer T } ? T : webcrypto.Crypto;
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/domexception.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/domexception.d.ts
new file mode 100644
index 0000000..5b1662c
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/domexception.d.ts
@@ -0,0 +1,68 @@
+export {};
+
+type _DOMException = typeof globalThis extends { onmessage: any } ? {} : DOMException;
+interface DOMException extends Error {
+    readonly code: number;
+    readonly message: string;
+    readonly name: string;
+    readonly INDEX_SIZE_ERR: 1;
+    readonly DOMSTRING_SIZE_ERR: 2;
+    readonly HIERARCHY_REQUEST_ERR: 3;
+    readonly WRONG_DOCUMENT_ERR: 4;
+    readonly INVALID_CHARACTER_ERR: 5;
+    readonly NO_DATA_ALLOWED_ERR: 6;
+    readonly NO_MODIFICATION_ALLOWED_ERR: 7;
+    readonly NOT_FOUND_ERR: 8;
+    readonly NOT_SUPPORTED_ERR: 9;
+    readonly INUSE_ATTRIBUTE_ERR: 10;
+    readonly INVALID_STATE_ERR: 11;
+    readonly SYNTAX_ERR: 12;
+    readonly INVALID_MODIFICATION_ERR: 13;
+    readonly NAMESPACE_ERR: 14;
+    readonly INVALID_ACCESS_ERR: 15;
+    readonly VALIDATION_ERR: 16;
+    readonly TYPE_MISMATCH_ERR: 17;
+    readonly SECURITY_ERR: 18;
+    readonly NETWORK_ERR: 19;
+    readonly ABORT_ERR: 20;
+    readonly URL_MISMATCH_ERR: 21;
+    readonly QUOTA_EXCEEDED_ERR: 22;
+    readonly TIMEOUT_ERR: 23;
+    readonly INVALID_NODE_TYPE_ERR: 24;
+    readonly DATA_CLONE_ERR: 25;
+}
+
+declare global {
+    interface DOMException extends _DOMException {}
+    var DOMException: typeof globalThis extends { onmessage: any; DOMException: infer T } ? T
+        : {
+            prototype: DOMException;
+            new(message?: string, name?: string): DOMException;
+            new(message?: string, options?: { name?: string; cause?: unknown }): DOMException;
+            readonly INDEX_SIZE_ERR: 1;
+            readonly DOMSTRING_SIZE_ERR: 2;
+            readonly HIERARCHY_REQUEST_ERR: 3;
+            readonly WRONG_DOCUMENT_ERR: 4;
+            readonly INVALID_CHARACTER_ERR: 5;
+            readonly NO_DATA_ALLOWED_ERR: 6;
+            readonly NO_MODIFICATION_ALLOWED_ERR: 7;
+            readonly NOT_FOUND_ERR: 8;
+            readonly NOT_SUPPORTED_ERR: 9;
+            readonly INUSE_ATTRIBUTE_ERR: 10;
+            readonly INVALID_STATE_ERR: 11;
+            readonly SYNTAX_ERR: 12;
+            readonly INVALID_MODIFICATION_ERR: 13;
+            readonly NAMESPACE_ERR: 14;
+            readonly INVALID_ACCESS_ERR: 15;
+            readonly VALIDATION_ERR: 16;
+            readonly TYPE_MISMATCH_ERR: 17;
+            readonly SECURITY_ERR: 18;
+            readonly NETWORK_ERR: 19;
+            readonly ABORT_ERR: 20;
+            readonly URL_MISMATCH_ERR: 21;
+            readonly QUOTA_EXCEEDED_ERR: 22;
+            readonly TIMEOUT_ERR: 23;
+            readonly INVALID_NODE_TYPE_ERR: 24;
+            readonly DATA_CLONE_ERR: 25;
+        };
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/encoding.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/encoding.d.ts
new file mode 100644
index 0000000..de5fa4f
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/encoding.d.ts
@@ -0,0 +1,11 @@
+export {};
+
+import * as util from "node:util";
+
+declare global {
+    interface TextDecoder extends util.TextDecoder {}
+    var TextDecoder: typeof globalThis extends { onmessage: any; TextDecoder: infer T } ? T : typeof util.TextDecoder;
+
+    interface TextEncoder extends util.TextEncoder {}
+    var TextEncoder: typeof globalThis extends { onmessage: any; TextEncoder: infer T } ? T : typeof util.TextEncoder;
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/events.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/events.d.ts
new file mode 100644
index 0000000..cdbcc69
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/events.d.ts
@@ -0,0 +1,106 @@
+export {};
+
+type _AddEventListenerOptions = typeof globalThis extends { onmessage: any } ? {} : AddEventListenerOptions;
+interface AddEventListenerOptions extends EventListenerOptions {
+    once?: boolean;
+    passive?: boolean;
+    signal?: AbortSignal;
+}
+
+type _CustomEvent<T = any> = typeof globalThis extends { onmessage: any } ? {} : CustomEvent<T>;
+interface CustomEvent<T = any> extends Event {
+    readonly detail: T;
+}
+
+interface CustomEventInit<T = any> extends EventInit {
+    detail?: T;
+}
+
+type _Event = typeof globalThis extends { onmessage: any } ? {} : Event;
+interface Event {
+    readonly bubbles: boolean;
+    cancelBubble: boolean;
+    readonly cancelable: boolean;
+    readonly composed: boolean;
+    readonly currentTarget: EventTarget | null;
+    readonly defaultPrevented: boolean;
+    readonly eventPhase: 0 | 2;
+    readonly isTrusted: boolean;
+    returnValue: boolean;
+    readonly srcElement: EventTarget | null;
+    readonly target: EventTarget | null;
+    readonly timeStamp: number;
+    readonly type: string;
+    composedPath(): [EventTarget?];
+    initEvent(type: string, bubbles?: boolean, cancelable?: boolean): void;
+    preventDefault(): void;
+    stopImmediatePropagation(): void;
+    stopPropagation(): void;
+}
+
+interface EventInit {
+    bubbles?: boolean;
+    cancelable?: boolean;
+    composed?: boolean;
+}
+
+type _EventListener = typeof globalThis extends { onmessage: any } ? {} : EventListener;
+interface EventListener {
+    (evt: Event): void;
+}
+
+type _EventListenerObject = typeof globalThis extends { onmessage: any } ? {} : EventListenerObject;
+interface EventListenerObject {
+    handleEvent(object: Event): void;
+}
+
+type _EventListenerOptions = typeof globalThis extends { onmessage: any } ? {} : EventListenerOptions;
+interface EventListenerOptions {
+    capture?: boolean;
+}
+
+type _EventTarget = typeof globalThis extends { onmessage: any } ? {} : EventTarget;
+interface EventTarget {
+    addEventListener(
+        type: string,
+        listener: EventListener | EventListenerObject,
+        options?: AddEventListenerOptions | boolean,
+    ): void;
+    dispatchEvent(event: Event): boolean;
+    removeEventListener(
+        type: string,
+        listener: EventListener | EventListenerObject,
+        options?: EventListenerOptions | boolean,
+    ): void;
+}
+
+declare global {
+    interface AddEventListenerOptions extends _AddEventListenerOptions {}
+
+    interface CustomEvent<T = any> extends _CustomEvent<T> {}
+    var CustomEvent: typeof globalThis extends { onmessage: any; CustomEvent: infer T } ? T
+        : {
+            prototype: CustomEvent;
+            new<T>(type: string, eventInitDict?: CustomEventInit<T>): CustomEvent<T>;
+        };
+
+    interface Event extends _Event {}
+    var Event: typeof globalThis extends { onmessage: any; Event: infer T } ? T
+        : {
+            prototype: Event;
+            new(type: string, eventInitDict?: EventInit): Event;
+        };
+
+    interface EventListener extends _EventListener {}
+
+    interface EventListenerObject extends _EventListenerObject {}
+
+    interface EventListenerOptions extends _EventListenerOptions {}
+
+    interface EventTarget extends _EventTarget {}
+    var EventTarget: typeof globalThis extends { onmessage: any; EventTarget: infer T } ? T
+        : {
+            prototype: EventTarget;
+            new(): EventTarget;
+        };
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/fetch.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/fetch.d.ts
new file mode 100644
index 0000000..0aa9588
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/fetch.d.ts
@@ -0,0 +1,69 @@
+export {};
+
+import * as undici from "undici-types";
+
+type _CloseEvent = typeof globalThis extends { onmessage: any } ? {} : undici.CloseEvent;
+type _CloseEventInit = typeof globalThis extends { onmessage: any } ? {} : undici.CloseEventInit;
+type _ErrorEvent = typeof globalThis extends { onmessage: any } ? {} : undici.ErrorEvent;
+type _ErrorEventInit = typeof globalThis extends { onmessage: any } ? {} : undici.ErrorEventInit;
+type _EventSource = typeof globalThis extends { onmessage: any } ? {} : undici.EventSource;
+type _EventSourceInit = typeof globalThis extends { onmessage: any } ? {} : undici.EventSourceInit;
+type _FormData = typeof globalThis extends { onmessage: any } ? {} : undici.FormData;
+type _Headers = typeof globalThis extends { onmessage: any } ? {} : undici.Headers;
+type _MessageEvent = typeof globalThis extends { onmessage: any } ? {} : undici.MessageEvent;
+type _MessageEventInit = typeof globalThis extends { onmessage: any } ? {} : undici.MessageEventInit;
+type _Request = typeof globalThis extends { onmessage: any } ? {} : undici.Request;
+type _RequestInit = typeof globalThis extends { onmessage: any } ? {} : undici.RequestInit;
+type _Response = typeof globalThis extends { onmessage: any } ? {} : undici.Response;
+type _ResponseInit = typeof globalThis extends { onmessage: any } ? {} : undici.ResponseInit;
+type _WebSocket = typeof globalThis extends { onmessage: any } ? {} : undici.WebSocket;
+type _WebSocketInit = typeof globalThis extends { onmessage: any } ? {} : undici.WebSocketInit;
+
+declare global {
+    function fetch(
+        input: string | URL | Request,
+        init?: RequestInit,
+    ): Promise<Response>;
+
+    interface CloseEvent extends _CloseEvent {}
+    var CloseEvent: typeof globalThis extends { onmessage: any; CloseEvent: infer T } ? T : typeof undici.CloseEvent;
+
+    interface CloseEventInit extends _CloseEventInit {}
+
+    interface ErrorEvent extends _ErrorEvent {}
+    var ErrorEvent: typeof globalThis extends { onmessage: any; ErrorEvent: infer T } ? T : typeof undici.ErrorEvent;
+
+    interface ErrorEventInit extends _ErrorEventInit {}
+
+    interface EventSource extends _EventSource {}
+    var EventSource: typeof globalThis extends { onmessage: any; EventSource: infer T } ? T : typeof undici.EventSource;
+
+    interface EventSourceInit extends _EventSourceInit {}
+
+    interface FormData extends _FormData {}
+    var FormData: typeof globalThis extends { onmessage: any; FormData: infer T } ? T : typeof undici.FormData;
+
+    interface Headers extends _Headers {}
+    var Headers: typeof globalThis extends { onmessage: any; Headers: infer T } ? T : typeof undici.Headers;
+
+    interface MessageEvent extends _MessageEvent {}
+    var MessageEvent: typeof globalThis extends { onmessage: any; MessageEvent: infer T } ? T
+        : typeof undici.MessageEvent;
+
+    interface MessageEventInit extends _MessageEventInit {}
+
+    interface Request extends _Request {}
+    var Request: typeof globalThis extends { onmessage: any; Request: infer T } ? T : typeof undici.Request;
+
+    interface RequestInit extends _RequestInit {}
+
+    interface Response extends _Response {}
+    var Response: typeof globalThis extends { onmessage: any; Response: infer T } ? T : typeof undici.Response;
+
+    interface ResponseInit extends _ResponseInit {}
+
+    interface WebSocket extends _WebSocket {}
+    var WebSocket: typeof globalThis extends { onmessage: any; WebSocket: infer T } ? T : typeof undici.WebSocket;
+
+    interface WebSocketInit extends _WebSocketInit {}
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/importmeta.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/importmeta.d.ts
new file mode 100644
index 0000000..33deba1
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/importmeta.d.ts
@@ -0,0 +1,13 @@
+export {};
+
+import { URL } from "node:url";
+
+declare global {
+    interface ImportMeta {
+        dirname: string;
+        filename: string;
+        main: boolean;
+        url: string;
+        resolve(specifier: string, parent?: string | URL): string;
+    }
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/messaging.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/messaging.d.ts
new file mode 100644
index 0000000..c914582
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/messaging.d.ts
@@ -0,0 +1,23 @@
+export {};
+
+import * as worker_threads from "node:worker_threads";
+
+type _BroadcastChannel = typeof globalThis extends { onmessage: any } ? {} : worker_threads.BroadcastChannel;
+type _MessageChannel = typeof globalThis extends { onmessage: any } ? {} : worker_threads.MessageChannel;
+type _MessagePort = typeof globalThis extends { onmessage: any } ? {} : worker_threads.MessagePort;
+
+declare global {
+    function structuredClone<T = any>(value: T, options?: worker_threads.StructuredSerializeOptions): T;
+
+    interface BroadcastChannel extends _BroadcastChannel {}
+    var BroadcastChannel: typeof globalThis extends { onmessage: any; BroadcastChannel: infer T } ? T
+        : typeof worker_threads.BroadcastChannel;
+
+    interface MessageChannel extends _MessageChannel {}
+    var MessageChannel: typeof globalThis extends { onmessage: any; MessageChannel: infer T } ? T
+        : typeof worker_threads.MessageChannel;
+
+    interface MessagePort extends _MessagePort {}
+    var MessagePort: typeof globalThis extends { onmessage: any; MessagePort: infer T } ? T
+        : typeof worker_threads.MessagePort;
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/navigator.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/navigator.d.ts
new file mode 100644
index 0000000..9b45b26
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/navigator.d.ts
@@ -0,0 +1,25 @@
+export {};
+
+import { LockManager } from "worker_threads";
+
+// lib.webworker has `WorkerNavigator` rather than `Navigator`, so conditionals use `onabort` instead of `onmessage`
+type _Navigator = typeof globalThis extends { onabort: any } ? {} : Navigator;
+interface Navigator {
+    readonly hardwareConcurrency: number;
+    readonly language: string;
+    readonly languages: readonly string[];
+    readonly locks: LockManager;
+    readonly platform: string;
+    readonly userAgent: string;
+}
+
+declare global {
+    interface Navigator extends _Navigator {}
+    var Navigator: typeof globalThis extends { onabort: any; Navigator: infer T } ? T : {
+        prototype: Navigator;
+        new(): Navigator;
+    };
+
+    // Needs conditional inference for lib.dom and lib.webworker compatibility
+    var navigator: typeof globalThis extends { onmessage: any; navigator: infer T } ? T : Navigator;
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/performance.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/performance.d.ts
new file mode 100644
index 0000000..b8f4e62
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/performance.d.ts
@@ -0,0 +1,45 @@
+export {};
+
+import * as perf_hooks from "node:perf_hooks";
+
+type _Performance = typeof globalThis extends { onmessage: any } ? {} : perf_hooks.Performance;
+type _PerformanceEntry = typeof globalThis extends { onmessage: any } ? {} : perf_hooks.PerformanceEntry;
+type _PerformanceMark = typeof globalThis extends { onmessage: any } ? {} : perf_hooks.PerformanceMark;
+type _PerformanceMeasure = typeof globalThis extends { onmessage: any } ? {} : perf_hooks.PerformanceMeasure;
+type _PerformanceObserver = typeof globalThis extends { onmessage: any } ? {} : perf_hooks.PerformanceObserver;
+type _PerformanceObserverEntryList = typeof globalThis extends { onmessage: any } ? {}
+    : perf_hooks.PerformanceObserverEntryList;
+type _PerformanceResourceTiming = typeof globalThis extends { onmessage: any } ? {}
+    : perf_hooks.PerformanceResourceTiming;
+
+declare global {
+    interface Performance extends _Performance {}
+    var Performance: typeof globalThis extends { onmessage: any; Performance: infer T } ? T
+        : typeof perf_hooks.Performance;
+
+    interface PerformanceEntry extends _PerformanceEntry {}
+    var PerformanceEntry: typeof globalThis extends { onmessage: any; PerformanceEntry: infer T } ? T
+        : typeof perf_hooks.PerformanceEntry;
+
+    interface PerformanceMark extends _PerformanceMark {}
+    var PerformanceMark: typeof globalThis extends { onmessage: any; PerformanceMark: infer T } ? T
+        : typeof perf_hooks.PerformanceMark;
+
+    interface PerformanceMeasure extends _PerformanceMeasure {}
+    var PerformanceMeasure: typeof globalThis extends { onmessage: any; PerformanceMeasure: infer T } ? T
+        : typeof perf_hooks.PerformanceMeasure;
+
+    interface PerformanceObserver extends _PerformanceObserver {}
+    var PerformanceObserver: typeof globalThis extends { onmessage: any; PerformanceObserver: infer T } ? T
+        : typeof perf_hooks.PerformanceObserver;
+
+    interface PerformanceObserverEntryList extends _PerformanceObserverEntryList {}
+    var PerformanceObserverEntryList: typeof globalThis extends
+        { onmessage: any; PerformanceObserverEntryList: infer T } ? T : typeof perf_hooks.PerformanceObserverEntryList;
+
+    interface PerformanceResourceTiming extends _PerformanceResourceTiming {}
+    var PerformanceResourceTiming: typeof globalThis extends { onmessage: any; PerformanceResourceTiming: infer T } ? T
+        : typeof perf_hooks.PerformanceResourceTiming;
+
+    var performance: typeof globalThis extends { onmessage: any; performance: infer T } ? T : perf_hooks.Performance;
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/storage.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/storage.d.ts
new file mode 100644
index 0000000..fd61cfc
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/storage.d.ts
@@ -0,0 +1,24 @@
+export {};
+
+// These interfaces are absent from lib.webworker, so the conditionals use `onabort` rather than `onmessage`
+type _Storage = typeof globalThis extends { onabort: any } ? {} : Storage;
+interface Storage {
+    readonly length: number;
+    clear(): void;
+    getItem(key: string): string | null;
+    key(index: number): string | null;
+    removeItem(key: string): void;
+    setItem(key: string, value: string): void;
+    [key: string]: any;
+}
+
+declare global {
+    interface Storage extends _Storage {}
+    var Storage: typeof globalThis extends { onabort: any; Storage: infer T } ? T : {
+        prototype: Storage;
+        new(): Storage;
+    };
+
+    var localStorage: Storage;
+    var sessionStorage: Storage;
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/streams.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/streams.d.ts
new file mode 100644
index 0000000..9650ea8
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/streams.d.ts
@@ -0,0 +1,115 @@
+export {};
+
+import * as webstreams from "stream/web";
+
+type _ByteLengthQueuingStrategy = typeof globalThis extends { onmessage: any } ? {}
+    : webstreams.ByteLengthQueuingStrategy;
+type _CompressionStream = typeof globalThis extends { onmessage: any } ? {} : webstreams.CompressionStream;
+type _CountQueuingStrategy = typeof globalThis extends { onmessage: any } ? {} : webstreams.CountQueuingStrategy;
+type _DecompressionStream = typeof globalThis extends { onmessage: any } ? {} : webstreams.DecompressionStream;
+type _QueuingStrategy<T = any> = typeof globalThis extends { onmessage: any } ? {} : webstreams.QueuingStrategy<T>;
+type _ReadableByteStreamController = typeof globalThis extends { onmessage: any } ? {}
+    : webstreams.ReadableByteStreamController;
+type _ReadableStream<R = any> = typeof globalThis extends { onmessage: any } ? {} : webstreams.ReadableStream<R>;
+type _ReadableStreamBYOBReader = typeof globalThis extends { onmessage: any } ? {}
+    : webstreams.ReadableStreamBYOBReader;
+type _ReadableStreamBYOBRequest = typeof globalThis extends { onmessage: any } ? {}
+    : webstreams.ReadableStreamBYOBRequest;
+type _ReadableStreamDefaultController<R = any> = typeof globalThis extends { onmessage: any } ? {}
+    : webstreams.ReadableStreamDefaultController<R>;
+type _ReadableStreamDefaultReader<R = any> = typeof globalThis extends { onmessage: any } ? {}
+    : webstreams.ReadableStreamDefaultReader<R>;
+type _TextDecoderStream = typeof globalThis extends { onmessage: any } ? {} : webstreams.TextDecoderStream;
+type _TextEncoderStream = typeof globalThis extends { onmessage: any } ? {} : webstreams.TextEncoderStream;
+type _TransformStream<I = any, O = any> = typeof globalThis extends { onmessage: any } ? {}
+    : webstreams.TransformStream<I, O>;
+type _TransformStreamDefaultController<O = any> = typeof globalThis extends { onmessage: any } ? {}
+    : webstreams.TransformStreamDefaultController<O>;
+type _WritableStream<W = any> = typeof globalThis extends { onmessage: any } ? {} : webstreams.WritableStream<W>;
+type _WritableStreamDefaultController = typeof globalThis extends { onmessage: any } ? {}
+    : webstreams.WritableStreamDefaultController;
+type _WritableStreamDefaultWriter<W = any> = typeof globalThis extends { onmessage: any } ? {}
+    : webstreams.WritableStreamDefaultWriter<W>;
+
+declare global {
+    interface ByteLengthQueuingStrategy extends _ByteLengthQueuingStrategy {}
+    var ByteLengthQueuingStrategy: typeof globalThis extends { onmessage: any; ByteLengthQueuingStrategy: infer T } ? T
+        : typeof webstreams.ByteLengthQueuingStrategy;
+
+    interface CompressionStream extends _CompressionStream {}
+    var CompressionStream: typeof globalThis extends {
+        onmessage: any;
+        CompressionStream: infer T;
+    } ? T
+        : typeof webstreams.CompressionStream;
+
+    interface CountQueuingStrategy extends _CountQueuingStrategy {}
+    var CountQueuingStrategy: typeof globalThis extends { onmessage: any; CountQueuingStrategy: infer T } ? T
+        : typeof webstreams.CountQueuingStrategy;
+
+    interface DecompressionStream extends _DecompressionStream {}
+    var DecompressionStream: typeof globalThis extends {
+        onmessage: any;
+        DecompressionStream: infer T;
+    } ? T
+        : typeof webstreams.DecompressionStream;
+
+    interface QueuingStrategy<T = any> extends _QueuingStrategy<T> {}
+
+    interface ReadableByteStreamController extends _ReadableByteStreamController {}
+    var ReadableByteStreamController: typeof globalThis extends
+        { onmessage: any; ReadableByteStreamController: infer T } ? T : typeof webstreams.ReadableByteStreamController;
+
+    interface ReadableStream<R = any> extends _ReadableStream<R> {}
+    var ReadableStream: typeof globalThis extends { onmessage: any; ReadableStream: infer T } ? T
+        : typeof webstreams.ReadableStream;
+
+    interface ReadableStreamBYOBReader extends _ReadableStreamBYOBReader {}
+    var ReadableStreamBYOBReader: typeof globalThis extends { onmessage: any; ReadableStreamBYOBReader: infer T } ? T
+        : typeof webstreams.ReadableStreamBYOBReader;
+
+    interface ReadableStreamBYOBRequest extends _ReadableStreamBYOBRequest {}
+    var ReadableStreamBYOBRequest: typeof globalThis extends { onmessage: any; ReadableStreamBYOBRequest: infer T } ? T
+        : typeof webstreams.ReadableStreamBYOBRequest;
+
+    interface ReadableStreamDefaultController<R = any> extends _ReadableStreamDefaultController<R> {}
+    var ReadableStreamDefaultController: typeof globalThis extends
+        { onmessage: any; ReadableStreamDefaultController: infer T } ? T
+        : typeof webstreams.ReadableStreamDefaultController;
+
+    interface ReadableStreamDefaultReader<R = any> extends _ReadableStreamDefaultReader<R> {}
+    var ReadableStreamDefaultReader: typeof globalThis extends { onmessage: any; ReadableStreamDefaultReader: infer T }
+        ? T
+        : typeof webstreams.ReadableStreamDefaultReader;
+
+    interface TextDecoderStream extends _TextDecoderStream {}
+    var TextDecoderStream: typeof globalThis extends { onmessage: any; TextDecoderStream: infer T } ? T
+        : typeof webstreams.TextDecoderStream;
+
+    interface TextEncoderStream extends _TextEncoderStream {}
+    var TextEncoderStream: typeof globalThis extends { onmessage: any; TextEncoderStream: infer T } ? T
+        : typeof webstreams.TextEncoderStream;
+
+    interface TransformStream<I = any, O = any> extends _TransformStream<I, O> {}
+    var TransformStream: typeof globalThis extends { onmessage: any; TransformStream: infer T } ? T
+        : typeof webstreams.TransformStream;
+
+    interface TransformStreamDefaultController<O = any> extends _TransformStreamDefaultController<O> {}
+    var TransformStreamDefaultController: typeof globalThis extends
+        { onmessage: any; TransformStreamDefaultController: infer T } ? T
+        : typeof webstreams.TransformStreamDefaultController;
+
+    interface WritableStream<W = any> extends _WritableStream<W> {}
+    var WritableStream: typeof globalThis extends { onmessage: any; WritableStream: infer T } ? T
+        : typeof webstreams.WritableStream;
+
+    interface WritableStreamDefaultController extends _WritableStreamDefaultController {}
+    var WritableStreamDefaultController: typeof globalThis extends
+        { onmessage: any; WritableStreamDefaultController: infer T } ? T
+        : typeof webstreams.WritableStreamDefaultController;
+
+    interface WritableStreamDefaultWriter<W = any> extends _WritableStreamDefaultWriter<W> {}
+    var WritableStreamDefaultWriter: typeof globalThis extends { onmessage: any; WritableStreamDefaultWriter: infer T }
+        ? T
+        : typeof webstreams.WritableStreamDefaultWriter;
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/timers.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/timers.d.ts
new file mode 100644
index 0000000..9f84a3e
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/timers.d.ts
@@ -0,0 +1,44 @@
+export {};
+
+import * as promises from "node:timers/promises";
+
+// Note: The timer function definitions allow a single void-accepting argument
+// to be optional in arguments lists. This allows usage such as
+// `new Promise(resolve => setTimeout(resolve, ms))` (#54258)
+// eslint-disable-next-line @typescript-eslint/no-invalid-void-type
+type MakeVoidParameterOptional<TArgs extends any[]> = [void] extends TArgs ? Partial<TArgs> : TArgs;
+
+declare global {
+    function setImmediate<TArgs extends any[]>(
+        callback: (...args: TArgs) => void,
+        ...args: MakeVoidParameterOptional<TArgs>
+    ): NodeJS.Immediate;
+    namespace setImmediate {
+        import __promisify__ = promises.setImmediate;
+        export { __promisify__ };
+    }
+
+    function setInterval<TArgs extends any[]>(
+        callback: (...args: TArgs) => void,
+        delay?: number,
+        ...args: MakeVoidParameterOptional<TArgs>
+    ): NodeJS.Timeout;
+
+    function setTimeout<TArgs extends any[]>(
+        callback: (...args: TArgs) => void,
+        delay?: number,
+        ...args: MakeVoidParameterOptional<TArgs>
+    ): NodeJS.Timeout;
+    namespace setTimeout {
+        import __promisify__ = promises.setTimeout;
+        export { __promisify__ };
+    }
+
+    function clearImmediate(immediate: NodeJS.Immediate | undefined): void;
+
+    function clearInterval(timeout: NodeJS.Timeout | string | number | undefined): void;
+
+    function clearTimeout(timeout: NodeJS.Timeout | string | number | undefined): void;
+
+    function queueMicrotask(callback: () => void): void;
+}
diff --git a/mqtt-backend/node_modules/@types/node/web-globals/url.d.ts b/mqtt-backend/node_modules/@types/node/web-globals/url.d.ts
new file mode 100644
index 0000000..d30208b
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/web-globals/url.d.ts
@@ -0,0 +1,24 @@
+export {};
+
+import * as url from "node:url";
+
+declare global {
+    interface URL extends url.URL {}
+    var URL: typeof globalThis extends { onmessage: any; URL: infer T } ? T : typeof url.URL;
+
+    interface URLPattern extends url.URLPattern {}
+    var URLPattern: typeof globalThis extends {
+        onmessage: any;
+        scheduler: any; // Must be a var introduced at the same time as URLPattern.
+        URLPattern: infer T;
+    } ? T
+        : typeof url.URLPattern;
+
+    interface URLPatternInit extends url.URLPatternInit {}
+
+    interface URLPatternResult extends url.URLPatternResult {}
+
+    interface URLSearchParams extends url.URLSearchParams {}
+    var URLSearchParams: typeof globalThis extends { onmessage: any; URLSearchParams: infer T } ? T
+        : typeof url.URLSearchParams;
+}
diff --git a/mqtt-backend/node_modules/@types/node/worker_threads.d.ts b/mqtt-backend/node_modules/@types/node/worker_threads.d.ts
new file mode 100644
index 0000000..fb602c3
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/worker_threads.d.ts
@@ -0,0 +1,671 @@
+declare module "node:worker_threads" {
+    import {
+        EventEmitter,
+        InternalEventEmitter,
+        InternalEventTargetEventProperties,
+        NodeEventTarget,
+    } from "node:events";
+    import { FileHandle } from "node:fs/promises";
+    import { Performance } from "node:perf_hooks";
+    import { Readable, Writable } from "node:stream";
+    import { ReadableStream, TransformStream, WritableStream } from "node:stream/web";
+    import { URL } from "node:url";
+    import { CPUProfileHandle, HeapInfo, HeapProfileHandle } from "node:v8";
+    import { Context } from "node:vm";
+    import { MessageEvent } from "undici-types";
+    const isInternalThread: boolean;
+    const isMainThread: boolean;
+    const parentPort: null | MessagePort;
+    const resourceLimits: ResourceLimits;
+    const SHARE_ENV: unique symbol;
+    const threadId: number;
+    const threadName: string | null;
+    const workerData: any;
+    interface WorkerPerformance extends Pick<Performance, "eventLoopUtilization"> {}
+    /** @deprecated Use `import { Transferable } from "node:worker_threads"` instead. */
+    // TODO: remove in a future major @types/node version.
+    type TransferListItem = Transferable;
+    interface WorkerOptions {
+        /**
+         * List of arguments which would be stringified and appended to
+         * `process.argv` in the worker. This is mostly similar to the `workerData`
+         * but the values will be available on the global `process.argv` as if they
+         * were passed as CLI options to the script.
+         */
+        argv?: any[] | undefined;
+        env?: NodeJS.Dict<string> | typeof SHARE_ENV | undefined;
+        eval?: boolean | undefined;
+        workerData?: any;
+        stdin?: boolean | undefined;
+        stdout?: boolean | undefined;
+        stderr?: boolean | undefined;
+        execArgv?: string[] | undefined;
+        resourceLimits?: ResourceLimits | undefined;
+        /**
+         * Additional data to send in the first worker message.
+         */
+        transferList?: Transferable[] | undefined;
+        /**
+         * @default true
+         */
+        trackUnmanagedFds?: boolean | undefined;
+        /**
+         * An optional `name` to be appended to the worker title
+         * for debugging/identification purposes, making the final title as
+         * `[worker ${id}] ${name}`.
+         */
+        name?: string | undefined;
+    }
+    interface ResourceLimits {
+        /**
+         * The maximum size of a heap space for recently created objects.
+         */
+        maxYoungGenerationSizeMb?: number | undefined;
+        /**
+         * The maximum size of the main heap in MB.
+         */
+        maxOldGenerationSizeMb?: number | undefined;
+        /**
+         * The size of a pre-allocated memory range used for generated code.
+         */
+        codeRangeSizeMb?: number | undefined;
+        /**
+         * The default maximum stack size for the thread. Small values may lead to unusable Worker instances.
+         * @default 4
+         */
+        stackSizeMb?: number | undefined;
+    }
+    interface WorkerEventMap {
+        "error": [err: unknown];
+        "exit": [exitCode: number];
+        "message": [value: any];
+        "messageerror": [error: Error];
+        "online": [];
+    }
+    /**
+     * The `Worker` class represents an independent JavaScript execution thread.
+     * Most Node.js APIs are available inside of it.
+     *
+     * Notable differences inside a Worker environment are:
+     *
+     * * The `process.stdin`, `process.stdout`, and `process.stderr` streams may be redirected by the parent thread.
+     * * The `import { isMainThread } from 'node:worker_threads'` variable is set to `false`.
+     * * The `import { parentPort } from 'node:worker_threads'` message port is available.
+     * * `process.exit()` does not stop the whole program, just the single thread,
+     * and `process.abort()` is not available.
+     * * `process.chdir()` and `process` methods that set group or user ids
+     * are not available.
+     * * `process.env` is a copy of the parent thread's environment variables,
+     * unless otherwise specified. Changes to one copy are not visible in other
+     * threads, and are not visible to native add-ons (unless `worker.SHARE_ENV` is passed as the `env` option to the `Worker` constructor). On Windows, unlike the main thread, a copy of the
+     * environment variables operates in a case-sensitive manner.
+     * * `process.title` cannot be modified.
+     * * Signals are not delivered through `process.on('...')`.
+     * * Execution may stop at any point as a result of `worker.terminate()` being invoked.
+     * * IPC channels from parent processes are not accessible.
+     * * The `trace_events` module is not supported.
+     * * Native add-ons can only be loaded from multiple threads if they fulfill `certain conditions`.
+     *
+     * Creating `Worker` instances inside of other `Worker`s is possible.
+     *
+     * Like [Web Workers](https://developer.mozilla.org/en-US/docs/Web/API/Web_Workers_API) and the `node:cluster module`, two-way communication
+     * can be achieved through inter-thread message passing. Internally, a `Worker` has
+     * a built-in pair of `MessagePort` s that are already associated with each
+     * other when the `Worker` is created. While the `MessagePort` object on the parent
+     * side is not directly exposed, its functionalities are exposed through `worker.postMessage()` and the `worker.on('message')` event
+     * on the `Worker` object for the parent thread.
+     *
+     * To create custom messaging channels (which is encouraged over using the default
+     * global channel because it facilitates separation of concerns), users can create
+     * a `MessageChannel` object on either thread and pass one of the`MessagePort`s on that `MessageChannel` to the other thread through a
+     * pre-existing channel, such as the global one.
+     *
+     * See `port.postMessage()` for more information on how messages are passed,
+     * and what kind of JavaScript values can be successfully transported through
+     * the thread barrier.
+     *
+     * ```js
+     * import assert from 'node:assert';
+     * import {
+     *   Worker, MessageChannel, MessagePort, isMainThread, parentPort,
+     * } from 'node:worker_threads';
+     * if (isMainThread) {
+     *   const worker = new Worker(__filename);
+     *   const subChannel = new MessageChannel();
+     *   worker.postMessage({ hereIsYourPort: subChannel.port1 }, [subChannel.port1]);
+     *   subChannel.port2.on('message', (value) => {
+     *     console.log('received:', value);
+     *   });
+     * } else {
+     *   parentPort.once('message', (value) => {
+     *     assert(value.hereIsYourPort instanceof MessagePort);
+     *     value.hereIsYourPort.postMessage('the worker is sending this');
+     *     value.hereIsYourPort.close();
+     *   });
+     * }
+     * ```
+     * @since v10.5.0
+     */
+    class Worker implements EventEmitter {
+        /**
+         * If `stdin: true` was passed to the `Worker` constructor, this is a
+         * writable stream. The data written to this stream will be made available in
+         * the worker thread as `process.stdin`.
+         * @since v10.5.0
+         */
+        readonly stdin: Writable | null;
+        /**
+         * This is a readable stream which contains data written to `process.stdout` inside the worker thread. If `stdout: true` was not passed to the `Worker` constructor, then data is piped to the
+         * parent thread's `process.stdout` stream.
+         * @since v10.5.0
+         */
+        readonly stdout: Readable;
+        /**
+         * This is a readable stream which contains data written to `process.stderr` inside the worker thread. If `stderr: true` was not passed to the `Worker` constructor, then data is piped to the
+         * parent thread's `process.stderr` stream.
+         * @since v10.5.0
+         */
+        readonly stderr: Readable;
+        /**
+         * An integer identifier for the referenced thread. Inside the worker thread,
+         * it is available as `import { threadId } from 'node:worker_threads'`.
+         * This value is unique for each `Worker` instance inside a single process.
+         * @since v10.5.0
+         */
+        readonly threadId: number;
+        /**
+         * A string identifier for the referenced thread or null if the thread is not running.
+         * Inside the worker thread, it is available as `require('node:worker_threads').threadName`.
+         * @since v24.6.0
+         */
+        readonly threadName: string | null;
+        /**
+         * Provides the set of JS engine resource constraints for this Worker thread.
+         * If the `resourceLimits` option was passed to the `Worker` constructor,
+         * this matches its values.
+         *
+         * If the worker has stopped, the return value is an empty object.
+         * @since v13.2.0, v12.16.0
+         */
+        readonly resourceLimits?: ResourceLimits | undefined;
+        /**
+         * An object that can be used to query performance information from a worker
+         * instance. Similar to `perf_hooks.performance`.
+         * @since v15.1.0, v14.17.0, v12.22.0
+         */
+        readonly performance: WorkerPerformance;
+        /**
+         * @param filename  The path to the Worker’s main script or module.
+         *                  Must be either an absolute path or a relative path (i.e. relative to the current working directory) starting with ./ or ../,
+         *                  or a WHATWG URL object using file: protocol. If options.eval is true, this is a string containing JavaScript code rather than a path.
+         */
+        constructor(filename: string | URL, options?: WorkerOptions);
+        /**
+         * Send a message to the worker that is received via `require('node:worker_threads').parentPort.on('message')`.
+         * See `port.postMessage()` for more details.
+         * @since v10.5.0
+         */
+        postMessage(value: any, transferList?: readonly Transferable[]): void;
+        /**
+         * Opposite of `unref()`, calling `ref()` on a previously `unref()`ed worker does _not_ let the program exit if it's the only active handle left (the default
+         * behavior). If the worker is `ref()`ed, calling `ref()` again has
+         * no effect.
+         * @since v10.5.0
+         */
+        ref(): void;
+        /**
+         * Calling `unref()` on a worker allows the thread to exit if this is the only
+         * active handle in the event system. If the worker is already `unref()`ed calling `unref()` again has no effect.
+         * @since v10.5.0
+         */
+        unref(): void;
+        /**
+         * Stop all JavaScript execution in the worker thread as soon as possible.
+         * Returns a Promise for the exit code that is fulfilled when the `'exit' event` is emitted.
+         * @since v10.5.0
+         */
+        terminate(): Promise<number>;
+        /**
+         * This method returns a `Promise` that will resolve to an object identical to `process.threadCpuUsage()`,
+         * or reject with an `ERR_WORKER_NOT_RUNNING` error if the worker is no longer running.
+         * This methods allows the statistics to be observed from outside the actual thread.
+         * @since v24.6.0
+         */
+        cpuUsage(prev?: NodeJS.CpuUsage): Promise<NodeJS.CpuUsage>;
+        /**
+         * Returns a readable stream for a V8 snapshot of the current state of the Worker.
+         * See `v8.getHeapSnapshot()` for more details.
+         *
+         * If the Worker thread is no longer running, which may occur before the `'exit' event` is emitted, the returned `Promise` is rejected
+         * immediately with an `ERR_WORKER_NOT_RUNNING` error.
+         * @since v13.9.0, v12.17.0
+         * @return A promise for a Readable Stream containing a V8 heap snapshot
+         */
+        getHeapSnapshot(): Promise<Readable>;
+        /**
+         * This method returns a `Promise` that will resolve to an object identical to `v8.getHeapStatistics()`,
+         * or reject with an `ERR_WORKER_NOT_RUNNING` error if the worker is no longer running.
+         * This methods allows the statistics to be observed from outside the actual thread.
+         * @since v24.0.0
+         */
+        getHeapStatistics(): Promise<HeapInfo>;
+        /**
+         * Starting a CPU profile then return a Promise that fulfills with an error
+         * or an `CPUProfileHandle` object. This API supports `await using` syntax.
+         *
+         * ```js
+         * const { Worker } = require('node:worker_threads');
+         *
+         * const worker = new Worker(`
+         *   const { parentPort } = require('worker_threads');
+         *   parentPort.on('message', () => {});
+         *   `, { eval: true });
+         *
+         * worker.on('online', async () => {
+         *   const handle = await worker.startCpuProfile();
+         *   const profile = await handle.stop();
+         *   console.log(profile);
+         *   worker.terminate();
+         * });
+         * ```
+         *
+         * `await using` example.
+         *
+         * ```js
+         * const { Worker } = require('node:worker_threads');
+         *
+         * const w = new Worker(`
+         *   const { parentPort } = require('node:worker_threads');
+         *   parentPort.on('message', () => {});
+         *   `, { eval: true });
+         *
+         * w.on('online', async () => {
+         *   // Stop profile automatically when return and profile will be discarded
+         *   await using handle = await w.startCpuProfile();
+         * });
+         * ```
+         * @since v24.8.0
+         */
+        startCpuProfile(): Promise<CPUProfileHandle>;
+        /**
+         * Starting a Heap profile then return a Promise that fulfills with an error
+         * or an `HeapProfileHandle` object. This API supports `await using` syntax.
+         *
+         * ```js
+         * const { Worker } = require('node:worker_threads');
+         *
+         * const worker = new Worker(`
+         *   const { parentPort } = require('worker_threads');
+         *   parentPort.on('message', () => {});
+         *   `, { eval: true });
+         *
+         * worker.on('online', async () => {
+         *   const handle = await worker.startHeapProfile();
+         *   const profile = await handle.stop();
+         *   console.log(profile);
+         *   worker.terminate();
+         * });
+         * ```
+         *
+         * `await using` example.
+         *
+         * ```js
+         * const { Worker } = require('node:worker_threads');
+         *
+         * const w = new Worker(`
+         *   const { parentPort } = require('node:worker_threads');
+         *   parentPort.on('message', () => {});
+         *   `, { eval: true });
+         *
+         * w.on('online', async () => {
+         *   // Stop profile automatically when return and profile will be discarded
+         *   await using handle = await w.startHeapProfile();
+         * });
+         * ```
+         */
+        startHeapProfile(): Promise<HeapProfileHandle>;
+        /**
+         * Calls `worker.terminate()` when the dispose scope is exited.
+         *
+         * ```js
+         * async function example() {
+         *   await using worker = new Worker('for (;;) {}', { eval: true });
+         *   // Worker is automatically terminate when the scope is exited.
+         * }
+         * ```
+         * @since v24.2.0
+         */
+        [Symbol.asyncDispose](): Promise<void>;
+    }
+    interface Worker extends InternalEventEmitter<WorkerEventMap> {}
+    /**
+     * Mark an object as not transferable. If `object` occurs in the transfer list of
+     * a [`port.postMessage()`](https://nodejs.org/docs/latest-v25.x/api/worker_threads.html#portpostmessagevalue-transferlist) call, an error is thrown. This is a no-op if
+     * `object` is a primitive value.
+     *
+     * In particular, this makes sense for objects that can be cloned, rather than
+     * transferred, and which are used by other objects on the sending side.
+     * For example, Node.js marks the `ArrayBuffer`s it uses for its
+     * [`Buffer` pool](https://nodejs.org/docs/latest-v25.x/api/buffer.html#static-method-bufferallocunsafesize) with this.
+     * `ArrayBuffer.prototype.transfer()` is disallowed on such array buffer
+     * instances.
+     *
+     * This operation cannot be undone.
+     *
+     * ```js
+     * import { MessageChannel, markAsUntransferable } from 'node:worker_threads';
+     *
+     * const pooledBuffer = new ArrayBuffer(8);
+     * const typedArray1 = new Uint8Array(pooledBuffer);
+     * const typedArray2 = new Float64Array(pooledBuffer);
+     *
+     * markAsUntransferable(pooledBuffer);
+     *
+     * const { port1 } = new MessageChannel();
+     * try {
+     *   // This will throw an error, because pooledBuffer is not transferable.
+     *   port1.postMessage(typedArray1, [ typedArray1.buffer ]);
+     * } catch (error) {
+     *   // error.name === 'DataCloneError'
+     * }
+     *
+     * // The following line prints the contents of typedArray1 -- it still owns
+     * // its memory and has not been transferred. Without
+     * // `markAsUntransferable()`, this would print an empty Uint8Array and the
+     * // postMessage call would have succeeded.
+     * // typedArray2 is intact as well.
+     * console.log(typedArray1);
+     * console.log(typedArray2);
+     * ```
+     *
+     * There is no equivalent to this API in browsers.
+     * @since v14.5.0, v12.19.0
+     */
+    function markAsUntransferable(object: object): void;
+    /**
+     * Check if an object is marked as not transferable with
+     * {@link markAsUntransferable}.
+     * @since v21.0.0
+     */
+    function isMarkedAsUntransferable(object: object): boolean;
+    /**
+     * Mark an object as not cloneable. If `object` is used as `message` in
+     * a `port.postMessage()` call, an error is thrown. This is a no-op if `object` is a
+     * primitive value.
+     *
+     * This has no effect on `ArrayBuffer`, or any `Buffer` like objects.
+     *
+     * This operation cannot be undone.
+     *
+     * ```js
+     * const { markAsUncloneable } = require('node:worker_threads');
+     *
+     * const anyObject = { foo: 'bar' };
+     * markAsUncloneable(anyObject);
+     * const { port1 } = new MessageChannel();
+     * try {
+     *   // This will throw an error, because anyObject is not cloneable.
+     *   port1.postMessage(anyObject)
+     * } catch (error) {
+     *   // error.name === 'DataCloneError'
+     * }
+     * ```
+     *
+     * There is no equivalent to this API in browsers.
+     * @since v22.10.0
+     */
+    function markAsUncloneable(object: object): void;
+    /**
+     * Transfer a `MessagePort` to a different `vm` Context. The original `port` object is rendered unusable, and the returned `MessagePort` instance
+     * takes its place.
+     *
+     * The returned `MessagePort` is an object in the target context and
+     * inherits from its global `Object` class. Objects passed to the [`port.onmessage()`](https://developer.mozilla.org/en-US/docs/Web/API/MessagePort/onmessage) listener are also created in the
+     * target context
+     * and inherit from its global `Object` class.
+     *
+     * However, the created `MessagePort` no longer inherits from [`EventTarget`](https://developer.mozilla.org/en-US/docs/Web/API/EventTarget), and only
+     * [`port.onmessage()`](https://developer.mozilla.org/en-US/docs/Web/API/MessagePort/onmessage) can be used to receive
+     * events using it.
+     * @since v11.13.0
+     * @param port The message port to transfer.
+     * @param contextifiedSandbox A `contextified` object as returned by the `vm.createContext()` method.
+     */
+    function moveMessagePortToContext(port: MessagePort, contextifiedSandbox: Context): MessagePort;
+    /**
+     * Receive a single message from a given `MessagePort`. If no message is available,`undefined` is returned, otherwise an object with a single `message` property
+     * that contains the message payload, corresponding to the oldest message in the `MessagePort`'s queue.
+     *
+     * ```js
+     * import { MessageChannel, receiveMessageOnPort } from 'node:worker_threads';
+     * const { port1, port2 } = new MessageChannel();
+     * port1.postMessage({ hello: 'world' });
+     *
+     * console.log(receiveMessageOnPort(port2));
+     * // Prints: { message: { hello: 'world' } }
+     * console.log(receiveMessageOnPort(port2));
+     * // Prints: undefined
+     * ```
+     *
+     * When this function is used, no `'message'` event is emitted and the `onmessage` listener is not invoked.
+     * @since v12.3.0
+     */
+    function receiveMessageOnPort(port: MessagePort):
+        | {
+            message: any;
+        }
+        | undefined;
+    type Serializable = string | object | number | boolean | bigint;
+    /**
+     * Within a worker thread, `worker.getEnvironmentData()` returns a clone
+     * of data passed to the spawning thread's `worker.setEnvironmentData()`.
+     * Every new `Worker` receives its own copy of the environment data
+     * automatically.
+     *
+     * ```js
+     * import {
+     *   Worker,
+     *   isMainThread,
+     *   setEnvironmentData,
+     *   getEnvironmentData,
+     * } from 'node:worker_threads';
+     *
+     * if (isMainThread) {
+     *   setEnvironmentData('Hello', 'World!');
+     *   const worker = new Worker(__filename);
+     * } else {
+     *   console.log(getEnvironmentData('Hello'));  // Prints 'World!'.
+     * }
+     * ```
+     * @since v15.12.0, v14.18.0
+     * @param key Any arbitrary, cloneable JavaScript value that can be used as a {Map} key.
+     */
+    function getEnvironmentData(key: Serializable): Serializable;
+    /**
+     * The `worker.setEnvironmentData()` API sets the content of `worker.getEnvironmentData()` in the current thread and all new `Worker` instances spawned from the current context.
+     * @since v15.12.0, v14.18.0
+     * @param key Any arbitrary, cloneable JavaScript value that can be used as a {Map} key.
+     * @param value Any arbitrary, cloneable JavaScript value that will be cloned and passed automatically to all new `Worker` instances. If `value` is passed as `undefined`, any previously set value
+     * for the `key` will be deleted.
+     */
+    function setEnvironmentData(key: Serializable, value?: Serializable): void;
+    /**
+     * Sends a value to another worker, identified by its thread ID.
+     * @param threadId The target thread ID. If the thread ID is invalid, a `ERR_WORKER_MESSAGING_FAILED` error will be thrown.
+     * If the target thread ID is the current thread ID, a `ERR_WORKER_MESSAGING_SAME_THREAD` error will be thrown.
+     * @param value The value to send.
+     * @param transferList If one or more `MessagePort`-like objects are passed in value, a `transferList` is required for those items
+     * or `ERR_MISSING_MESSAGE_PORT_IN_TRANSFER_LIST` is thrown. See `port.postMessage()` for more information.
+     * @param timeout Time to wait for the message to be delivered in milliseconds. By default it's `undefined`, which means wait forever.
+     * If the operation times out, a `ERR_WORKER_MESSAGING_TIMEOUT` error is thrown.
+     * @since v22.5.0
+     */
+    function postMessageToThread(threadId: number, value: any, timeout?: number): Promise<void>;
+    function postMessageToThread(
+        threadId: number,
+        value: any,
+        transferList: readonly Transferable[],
+        timeout?: number,
+    ): Promise<void>;
+    // #region web types
+    type LockMode = "exclusive" | "shared";
+    type Transferable =
+        | ArrayBuffer
+        | MessagePort
+        | AbortSignal
+        | FileHandle
+        | ReadableStream
+        | WritableStream
+        | TransformStream;
+    interface LockGrantedCallback<T> {
+        (lock: Lock | null): T;
+    }
+    interface LockInfo {
+        clientId: string;
+        mode: LockMode;
+        name: string;
+    }
+    interface LockManagerSnapshot {
+        held: LockInfo[];
+        pending: LockInfo[];
+    }
+    interface LockOptions {
+        ifAvailable?: boolean;
+        mode?: LockMode;
+        signal?: AbortSignal;
+        steal?: boolean;
+    }
+    interface StructuredSerializeOptions {
+        transfer?: Transferable[];
+    }
+    interface BroadcastChannelEventMap {
+        "message": MessageEvent;
+        "messageerror": MessageEvent;
+    }
+    interface BroadcastChannel
+        extends EventTarget, InternalEventTargetEventProperties<BroadcastChannelEventMap>, NodeJS.RefCounted
+    {
+        readonly name: string;
+        close(): void;
+        postMessage(message: any): void;
+        addEventListener<K extends keyof BroadcastChannelEventMap>(
+            type: K,
+            listener: (ev: BroadcastChannelEventMap[K]) => void,
+            options?: AddEventListenerOptions | boolean,
+        ): void;
+        addEventListener(
+            type: string,
+            listener: EventListener | EventListenerObject,
+            options?: AddEventListenerOptions | boolean,
+        ): void;
+        removeEventListener<K extends keyof BroadcastChannelEventMap>(
+            type: K,
+            listener: (ev: BroadcastChannelEventMap[K]) => void,
+            options?: EventListenerOptions | boolean,
+        ): void;
+        removeEventListener(
+            type: string,
+            listener: EventListener | EventListenerObject,
+            options?: EventListenerOptions | boolean,
+        ): void;
+    }
+    var BroadcastChannel: {
+        prototype: BroadcastChannel;
+        new(name: string): BroadcastChannel;
+    };
+    interface Lock {
+        readonly mode: LockMode;
+        readonly name: string;
+    }
+    // var Lock: {
+    //     prototype: Lock;
+    //     new(): Lock;
+    // };
+    interface LockManager {
+        query(): Promise<LockManagerSnapshot>;
+        request<T>(name: string, callback: LockGrantedCallback<T>): Promise<Awaited<T>>;
+        request<T>(name: string, options: LockOptions, callback: LockGrantedCallback<T>): Promise<Awaited<T>>;
+    }
+    // var LockManager: {
+    //     prototype: LockManager;
+    //     new(): LockManager;
+    // };
+    interface MessageChannel {
+        readonly port1: MessagePort;
+        readonly port2: MessagePort;
+    }
+    var MessageChannel: {
+        prototype: MessageChannel;
+        new(): MessageChannel;
+    };
+    interface MessagePortEventMap {
+        "close": Event;
+        "message": MessageEvent;
+        "messageerror": MessageEvent;
+    }
+    interface MessagePort extends NodeEventTarget, InternalEventTargetEventProperties<MessagePortEventMap> {
+        close(): void;
+        postMessage(message: any, transfer: Transferable[]): void;
+        postMessage(message: any, options?: StructuredSerializeOptions): void;
+        start(): void;
+        hasRef(): boolean;
+        ref(): void;
+        unref(): void;
+        addEventListener<K extends keyof MessagePortEventMap>(
+            type: K,
+            listener: (ev: MessagePortEventMap[K]) => void,
+            options?: AddEventListenerOptions | boolean,
+        ): void;
+        addEventListener(
+            type: string,
+            listener: EventListener | EventListenerObject,
+            options?: AddEventListenerOptions | boolean,
+        ): void;
+        removeEventListener<K extends keyof MessagePortEventMap>(
+            type: K,
+            listener: (ev: MessagePortEventMap[K]) => void,
+            options?: EventListenerOptions | boolean,
+        ): void;
+        removeEventListener(
+            type: string,
+            listener: EventListener | EventListenerObject,
+            options?: EventListenerOptions | boolean,
+        ): void;
+        // #region NodeEventTarget
+        addListener(event: "close", listener: (ev: Event) => void): this;
+        addListener(event: "message", listener: (value: any) => void): this;
+        addListener(event: "messageerror", listener: (error: Error) => void): this;
+        addListener(event: string, listener: (arg: any) => void): this;
+        emit(event: "close", ev: Event): boolean;
+        emit(event: "message", value: any): boolean;
+        emit(event: "messageerror", error: Error): boolean;
+        emit(event: string, arg: any): boolean;
+        off(event: "close", listener: (ev: Event) => void, options?: EventListenerOptions): this;
+        off(event: "message", listener: (value: any) => void, options?: EventListenerOptions): this;
+        off(event: "messageerror", listener: (error: Error) => void, options?: EventListenerOptions): this;
+        off(event: string, listener: (arg: any) => void, options?: EventListenerOptions): this;
+        on(event: "close", listener: (ev: Event) => void): this;
+        on(event: "message", listener: (value: any) => void): this;
+        on(event: "messageerror", listener: (error: Error) => void): this;
+        on(event: string, listener: (arg: any) => void): this;
+        once(event: "close", listener: (ev: Event) => void): this;
+        once(event: "message", listener: (value: any) => void): this;
+        once(event: "messageerror", listener: (error: Error) => void): this;
+        once(event: string, listener: (arg: any) => void): this;
+        removeListener(event: "close", listener: (ev: Event) => void, options?: EventListenerOptions): this;
+        removeListener(event: "message", listener: (value: any) => void, options?: EventListenerOptions): this;
+        removeListener(event: "messageerror", listener: (error: Error) => void, options?: EventListenerOptions): this;
+        removeListener(event: string, listener: (arg: any) => void, options?: EventListenerOptions): this;
+        // #endregion
+    }
+    var MessagePort: {
+        prototype: MessagePort;
+        new(): MessagePort;
+    };
+    var locks: LockManager;
+    export import structuredClone = globalThis.structuredClone;
+    // #endregion
+}
+declare module "worker_threads" {
+    export * from "node:worker_threads";
+}
diff --git a/mqtt-backend/node_modules/@types/node/zlib.d.ts b/mqtt-backend/node_modules/@types/node/zlib.d.ts
new file mode 100644
index 0000000..e197430
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/node/zlib.d.ts
@@ -0,0 +1,589 @@
+declare module "node:zlib" {
+    import { NonSharedBuffer } from "node:buffer";
+    import * as stream from "node:stream";
+    interface ZlibOptions {
+        /**
+         * @default constants.Z_NO_FLUSH
+         */
+        flush?: number | undefined;
+        /**
+         * @default constants.Z_FINISH
+         */
+        finishFlush?: number | undefined;
+        /**
+         * @default 16*1024
+         */
+        chunkSize?: number | undefined;
+        windowBits?: number | undefined;
+        /** compression only */
+        level?: number | undefined;
+        /** compression only */
+        memLevel?: number | undefined;
+        /** compression only */
+        strategy?: number | undefined;
+        /** deflate/inflate only, empty dictionary by default */
+        dictionary?: NodeJS.ArrayBufferView | ArrayBuffer | undefined;
+        /**
+         * If `true`, returns an object with `buffer` and `engine`.
+         */
+        info?: boolean | undefined;
+        /**
+         * Limits output size when using convenience methods.
+         * @default buffer.kMaxLength
+         */
+        maxOutputLength?: number | undefined;
+    }
+    interface BrotliOptions {
+        /**
+         * @default constants.BROTLI_OPERATION_PROCESS
+         */
+        flush?: number | undefined;
+        /**
+         * @default constants.BROTLI_OPERATION_FINISH
+         */
+        finishFlush?: number | undefined;
+        /**
+         * @default 16*1024
+         */
+        chunkSize?: number | undefined;
+        params?:
+            | {
+                /**
+                 * Each key is a `constants.BROTLI_*` constant.
+                 */
+                [key: number]: boolean | number;
+            }
+            | undefined;
+        /**
+         * Limits output size when using [convenience methods](https://nodejs.org/docs/latest-v25.x/api/zlib.html#convenience-methods).
+         * @default buffer.kMaxLength
+         */
+        maxOutputLength?: number | undefined;
+        /**
+         * If `true`, returns an object with `buffer` and `engine`.
+         */
+        info?: boolean | undefined;
+    }
+    interface ZstdOptions {
+        /**
+         * @default constants.ZSTD_e_continue
+         */
+        flush?: number | undefined;
+        /**
+         * @default constants.ZSTD_e_end
+         */
+        finishFlush?: number | undefined;
+        /**
+         * @default 16 * 1024
+         */
+        chunkSize?: number | undefined;
+        /**
+         * Key-value object containing indexed
+         * [Zstd parameters](https://nodejs.org/docs/latest-v25.x/api/zlib.html#zstd-constants).
+         */
+        params?: { [key: number]: number | boolean } | undefined;
+        /**
+         * Limits output size when using
+         * [convenience methods](https://nodejs.org/docs/latest-v25.x/api/zlib.html#convenience-methods).
+         * @default buffer.kMaxLength
+         */
+        maxOutputLength?: number | undefined;
+        /**
+         * If `true`, returns an object with `buffer` and `engine`.
+         */
+        info?: boolean | undefined;
+        /**
+         * Optional dictionary used to improve compression efficiency when compressing or decompressing data that
+         * shares common patterns with the dictionary.
+         * @since v24.6.0
+         */
+        dictionary?: NodeJS.ArrayBufferView | undefined;
+    }
+    interface Zlib {
+        readonly bytesWritten: number;
+        shell?: boolean | string | undefined;
+        close(callback?: () => void): void;
+        flush(kind?: number, callback?: () => void): void;
+        flush(callback?: () => void): void;
+    }
+    interface ZlibParams {
+        params(level: number, strategy: number, callback: () => void): void;
+    }
+    interface ZlibReset {
+        reset(): void;
+    }
+    /**
+     * @since v10.16.0
+     */
+    class BrotliCompress extends stream.Transform {
+        constructor(options?: BrotliOptions);
+    }
+    interface BrotliCompress extends stream.Transform, Zlib {}
+    /**
+     * @since v10.16.0
+     */
+    class BrotliDecompress extends stream.Transform {
+        constructor(options?: BrotliOptions);
+    }
+    interface BrotliDecompress extends stream.Transform, Zlib {}
+    /**
+     * @since v0.5.8
+     */
+    class Gzip extends stream.Transform {
+        constructor(options?: ZlibOptions);
+    }
+    interface Gzip extends stream.Transform, Zlib {}
+    /**
+     * @since v0.5.8
+     */
+    class Gunzip extends stream.Transform {
+        constructor(options?: ZlibOptions);
+    }
+    interface Gunzip extends stream.Transform, Zlib {}
+    /**
+     * @since v0.5.8
+     */
+    class Deflate extends stream.Transform {
+        constructor(options?: ZlibOptions);
+    }
+    interface Deflate extends stream.Transform, Zlib, ZlibReset, ZlibParams {}
+    /**
+     * @since v0.5.8
+     */
+    class Inflate extends stream.Transform {
+        constructor(options?: ZlibOptions);
+    }
+    interface Inflate extends stream.Transform, Zlib, ZlibReset {}
+    /**
+     * @since v0.5.8
+     */
+    class DeflateRaw extends stream.Transform {
+        constructor(options?: ZlibOptions);
+    }
+    interface DeflateRaw extends stream.Transform, Zlib, ZlibReset, ZlibParams {}
+    /**
+     * @since v0.5.8
+     */
+    class InflateRaw extends stream.Transform {
+        constructor(options?: ZlibOptions);
+    }
+    interface InflateRaw extends stream.Transform, Zlib, ZlibReset {}
+    /**
+     * @since v0.5.8
+     */
+    class Unzip extends stream.Transform {
+        constructor(options?: ZlibOptions);
+    }
+    interface Unzip extends stream.Transform, Zlib {}
+    /**
+     * @since v22.15.0
+     * @experimental
+     */
+    class ZstdCompress extends stream.Transform {
+        constructor(options?: ZstdOptions);
+    }
+    interface ZstdCompress extends stream.Transform, Zlib {}
+    /**
+     * @since v22.15.0
+     * @experimental
+     */
+    class ZstdDecompress extends stream.Transform {
+        constructor(options?: ZstdOptions);
+    }
+    interface ZstdDecompress extends stream.Transform, Zlib {}
+    /**
+     * Computes a 32-bit [Cyclic Redundancy Check](https://en.wikipedia.org/wiki/Cyclic_redundancy_check) checksum of `data`.
+     * If `value` is specified, it is used as the starting value of the checksum, otherwise, 0 is used as the starting value.
+     * @param data When `data` is a string, it will be encoded as UTF-8 before being used for computation.
+     * @param value An optional starting value. It must be a 32-bit unsigned integer. @default 0
+     * @returns A 32-bit unsigned integer containing the checksum.
+     * @since v22.2.0
+     */
+    function crc32(data: string | NodeJS.ArrayBufferView, value?: number): number;
+    /**
+     * Creates and returns a new `BrotliCompress` object.
+     * @since v11.7.0, v10.16.0
+     */
+    function createBrotliCompress(options?: BrotliOptions): BrotliCompress;
+    /**
+     * Creates and returns a new `BrotliDecompress` object.
+     * @since v11.7.0, v10.16.0
+     */
+    function createBrotliDecompress(options?: BrotliOptions): BrotliDecompress;
+    /**
+     * Creates and returns a new `Gzip` object.
+     * See `example`.
+     * @since v0.5.8
+     */
+    function createGzip(options?: ZlibOptions): Gzip;
+    /**
+     * Creates and returns a new `Gunzip` object.
+     * @since v0.5.8
+     */
+    function createGunzip(options?: ZlibOptions): Gunzip;
+    /**
+     * Creates and returns a new `Deflate` object.
+     * @since v0.5.8
+     */
+    function createDeflate(options?: ZlibOptions): Deflate;
+    /**
+     * Creates and returns a new `Inflate` object.
+     * @since v0.5.8
+     */
+    function createInflate(options?: ZlibOptions): Inflate;
+    /**
+     * Creates and returns a new `DeflateRaw` object.
+     *
+     * An upgrade of zlib from 1.2.8 to 1.2.11 changed behavior when `windowBits` is set to 8 for raw deflate streams. zlib would automatically set `windowBits` to 9 if was initially set to 8. Newer
+     * versions of zlib will throw an exception,
+     * so Node.js restored the original behavior of upgrading a value of 8 to 9,
+     * since passing `windowBits = 9` to zlib actually results in a compressed stream
+     * that effectively uses an 8-bit window only.
+     * @since v0.5.8
+     */
+    function createDeflateRaw(options?: ZlibOptions): DeflateRaw;
+    /**
+     * Creates and returns a new `InflateRaw` object.
+     * @since v0.5.8
+     */
+    function createInflateRaw(options?: ZlibOptions): InflateRaw;
+    /**
+     * Creates and returns a new `Unzip` object.
+     * @since v0.5.8
+     */
+    function createUnzip(options?: ZlibOptions): Unzip;
+    /**
+     * Creates and returns a new `ZstdCompress` object.
+     * @since v22.15.0
+     */
+    function createZstdCompress(options?: ZstdOptions): ZstdCompress;
+    /**
+     * Creates and returns a new `ZstdDecompress` object.
+     * @since v22.15.0
+     */
+    function createZstdDecompress(options?: ZstdOptions): ZstdDecompress;
+    type InputType = string | ArrayBuffer | NodeJS.ArrayBufferView;
+    type CompressCallback = (error: Error | null, result: NonSharedBuffer) => void;
+    /**
+     * @since v11.7.0, v10.16.0
+     */
+    function brotliCompress(buf: InputType, options: BrotliOptions, callback: CompressCallback): void;
+    function brotliCompress(buf: InputType, callback: CompressCallback): void;
+    namespace brotliCompress {
+        function __promisify__(buffer: InputType, options?: BrotliOptions): Promise<NonSharedBuffer>;
+    }
+    /**
+     * Compress a chunk of data with `BrotliCompress`.
+     * @since v11.7.0, v10.16.0
+     */
+    function brotliCompressSync(buf: InputType, options?: BrotliOptions): NonSharedBuffer;
+    /**
+     * @since v11.7.0, v10.16.0
+     */
+    function brotliDecompress(buf: InputType, options: BrotliOptions, callback: CompressCallback): void;
+    function brotliDecompress(buf: InputType, callback: CompressCallback): void;
+    namespace brotliDecompress {
+        function __promisify__(buffer: InputType, options?: BrotliOptions): Promise<NonSharedBuffer>;
+    }
+    /**
+     * Decompress a chunk of data with `BrotliDecompress`.
+     * @since v11.7.0, v10.16.0
+     */
+    function brotliDecompressSync(buf: InputType, options?: BrotliOptions): NonSharedBuffer;
+    /**
+     * @since v0.6.0
+     */
+    function deflate(buf: InputType, callback: CompressCallback): void;
+    function deflate(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
+    namespace deflate {
+        function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
+    }
+    /**
+     * Compress a chunk of data with `Deflate`.
+     * @since v0.11.12
+     */
+    function deflateSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
+    /**
+     * @since v0.6.0
+     */
+    function deflateRaw(buf: InputType, callback: CompressCallback): void;
+    function deflateRaw(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
+    namespace deflateRaw {
+        function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
+    }
+    /**
+     * Compress a chunk of data with `DeflateRaw`.
+     * @since v0.11.12
+     */
+    function deflateRawSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
+    /**
+     * @since v0.6.0
+     */
+    function gzip(buf: InputType, callback: CompressCallback): void;
+    function gzip(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
+    namespace gzip {
+        function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
+    }
+    /**
+     * Compress a chunk of data with `Gzip`.
+     * @since v0.11.12
+     */
+    function gzipSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
+    /**
+     * @since v0.6.0
+     */
+    function gunzip(buf: InputType, callback: CompressCallback): void;
+    function gunzip(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
+    namespace gunzip {
+        function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
+    }
+    /**
+     * Decompress a chunk of data with `Gunzip`.
+     * @since v0.11.12
+     */
+    function gunzipSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
+    /**
+     * @since v0.6.0
+     */
+    function inflate(buf: InputType, callback: CompressCallback): void;
+    function inflate(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
+    namespace inflate {
+        function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
+    }
+    /**
+     * Decompress a chunk of data with `Inflate`.
+     * @since v0.11.12
+     */
+    function inflateSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
+    /**
+     * @since v0.6.0
+     */
+    function inflateRaw(buf: InputType, callback: CompressCallback): void;
+    function inflateRaw(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
+    namespace inflateRaw {
+        function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
+    }
+    /**
+     * Decompress a chunk of data with `InflateRaw`.
+     * @since v0.11.12
+     */
+    function inflateRawSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
+    /**
+     * @since v0.6.0
+     */
+    function unzip(buf: InputType, callback: CompressCallback): void;
+    function unzip(buf: InputType, options: ZlibOptions, callback: CompressCallback): void;
+    namespace unzip {
+        function __promisify__(buffer: InputType, options?: ZlibOptions): Promise<NonSharedBuffer>;
+    }
+    /**
+     * Decompress a chunk of data with `Unzip`.
+     * @since v0.11.12
+     */
+    function unzipSync(buf: InputType, options?: ZlibOptions): NonSharedBuffer;
+    /**
+     * @since v22.15.0
+     * @experimental
+     */
+    function zstdCompress(buf: InputType, callback: CompressCallback): void;
+    function zstdCompress(buf: InputType, options: ZstdOptions, callback: CompressCallback): void;
+    namespace zstdCompress {
+        function __promisify__(buffer: InputType, options?: ZstdOptions): Promise<NonSharedBuffer>;
+    }
+    /**
+     * Compress a chunk of data with `ZstdCompress`.
+     * @since v22.15.0
+     * @experimental
+     */
+    function zstdCompressSync(buf: InputType, options?: ZstdOptions): NonSharedBuffer;
+    /**
+     * @since v22.15.0
+     * @experimental
+     */
+    function zstdDecompress(buf: InputType, callback: CompressCallback): void;
+    function zstdDecompress(buf: InputType, options: ZstdOptions, callback: CompressCallback): void;
+    namespace zstdDecompress {
+        function __promisify__(buffer: InputType, options?: ZstdOptions): Promise<NonSharedBuffer>;
+    }
+    /**
+     * Decompress a chunk of data with `ZstdDecompress`.
+     * @since v22.15.0
+     * @experimental
+     */
+    function zstdDecompressSync(buf: InputType, options?: ZstdOptions): NonSharedBuffer;
+    namespace constants {
+        const BROTLI_DECODE: number;
+        const BROTLI_DECODER_ERROR_ALLOC_BLOCK_TYPE_TREES: number;
+        const BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MAP: number;
+        const BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MODES: number;
+        const BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_1: number;
+        const BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2: number;
+        const BROTLI_DECODER_ERROR_ALLOC_TREE_GROUPS: number;
+        const BROTLI_DECODER_ERROR_DICTIONARY_NOT_SET: number;
+        const BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_1: number;
+        const BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_2: number;
+        const BROTLI_DECODER_ERROR_FORMAT_CL_SPACE: number;
+        const BROTLI_DECODER_ERROR_FORMAT_CONTEXT_MAP_REPEAT: number;
+        const BROTLI_DECODER_ERROR_FORMAT_DICTIONARY: number;
+        const BROTLI_DECODER_ERROR_FORMAT_DISTANCE: number;
+        const BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_META_NIBBLE: number;
+        const BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_NIBBLE: number;
+        const BROTLI_DECODER_ERROR_FORMAT_HUFFMAN_SPACE: number;
+        const BROTLI_DECODER_ERROR_FORMAT_PADDING_1: number;
+        const BROTLI_DECODER_ERROR_FORMAT_PADDING_2: number;
+        const BROTLI_DECODER_ERROR_FORMAT_RESERVED: number;
+        const BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_ALPHABET: number;
+        const BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME: number;
+        const BROTLI_DECODER_ERROR_FORMAT_TRANSFORM: number;
+        const BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS: number;
+        const BROTLI_DECODER_ERROR_INVALID_ARGUMENTS: number;
+        const BROTLI_DECODER_ERROR_UNREACHABLE: number;
+        const BROTLI_DECODER_NEEDS_MORE_INPUT: number;
+        const BROTLI_DECODER_NEEDS_MORE_OUTPUT: number;
+        const BROTLI_DECODER_NO_ERROR: number;
+        const BROTLI_DECODER_PARAM_DISABLE_RING_BUFFER_REALLOCATION: number;
+        const BROTLI_DECODER_PARAM_LARGE_WINDOW: number;
+        const BROTLI_DECODER_RESULT_ERROR: number;
+        const BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT: number;
+        const BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT: number;
+        const BROTLI_DECODER_RESULT_SUCCESS: number;
+        const BROTLI_DECODER_SUCCESS: number;
+        const BROTLI_DEFAULT_MODE: number;
+        const BROTLI_DEFAULT_QUALITY: number;
+        const BROTLI_DEFAULT_WINDOW: number;
+        const BROTLI_ENCODE: number;
+        const BROTLI_LARGE_MAX_WINDOW_BITS: number;
+        const BROTLI_MAX_INPUT_BLOCK_BITS: number;
+        const BROTLI_MAX_QUALITY: number;
+        const BROTLI_MAX_WINDOW_BITS: number;
+        const BROTLI_MIN_INPUT_BLOCK_BITS: number;
+        const BROTLI_MIN_QUALITY: number;
+        const BROTLI_MIN_WINDOW_BITS: number;
+        const BROTLI_MODE_FONT: number;
+        const BROTLI_MODE_GENERIC: number;
+        const BROTLI_MODE_TEXT: number;
+        const BROTLI_OPERATION_EMIT_METADATA: number;
+        const BROTLI_OPERATION_FINISH: number;
+        const BROTLI_OPERATION_FLUSH: number;
+        const BROTLI_OPERATION_PROCESS: number;
+        const BROTLI_PARAM_DISABLE_LITERAL_CONTEXT_MODELING: number;
+        const BROTLI_PARAM_LARGE_WINDOW: number;
+        const BROTLI_PARAM_LGBLOCK: number;
+        const BROTLI_PARAM_LGWIN: number;
+        const BROTLI_PARAM_MODE: number;
+        const BROTLI_PARAM_NDIRECT: number;
+        const BROTLI_PARAM_NPOSTFIX: number;
+        const BROTLI_PARAM_QUALITY: number;
+        const BROTLI_PARAM_SIZE_HINT: number;
+        const DEFLATE: number;
+        const DEFLATERAW: number;
+        const GUNZIP: number;
+        const GZIP: number;
+        const INFLATE: number;
+        const INFLATERAW: number;
+        const UNZIP: number;
+        const ZLIB_VERNUM: number;
+        const ZSTD_CLEVEL_DEFAULT: number;
+        const ZSTD_COMPRESS: number;
+        const ZSTD_DECOMPRESS: number;
+        const ZSTD_btlazy2: number;
+        const ZSTD_btopt: number;
+        const ZSTD_btultra: number;
+        const ZSTD_btultra2: number;
+        const ZSTD_c_chainLog: number;
+        const ZSTD_c_checksumFlag: number;
+        const ZSTD_c_compressionLevel: number;
+        const ZSTD_c_contentSizeFlag: number;
+        const ZSTD_c_dictIDFlag: number;
+        const ZSTD_c_enableLongDistanceMatching: number;
+        const ZSTD_c_hashLog: number;
+        const ZSTD_c_jobSize: number;
+        const ZSTD_c_ldmBucketSizeLog: number;
+        const ZSTD_c_ldmHashLog: number;
+        const ZSTD_c_ldmHashRateLog: number;
+        const ZSTD_c_ldmMinMatch: number;
+        const ZSTD_c_minMatch: number;
+        const ZSTD_c_nbWorkers: number;
+        const ZSTD_c_overlapLog: number;
+        const ZSTD_c_searchLog: number;
+        const ZSTD_c_strategy: number;
+        const ZSTD_c_targetLength: number;
+        const ZSTD_c_windowLog: number;
+        const ZSTD_d_windowLogMax: number;
+        const ZSTD_dfast: number;
+        const ZSTD_e_continue: number;
+        const ZSTD_e_end: number;
+        const ZSTD_e_flush: number;
+        const ZSTD_error_GENERIC: number;
+        const ZSTD_error_checksum_wrong: number;
+        const ZSTD_error_corruption_detected: number;
+        const ZSTD_error_dictionaryCreation_failed: number;
+        const ZSTD_error_dictionary_corrupted: number;
+        const ZSTD_error_dictionary_wrong: number;
+        const ZSTD_error_dstBuffer_null: number;
+        const ZSTD_error_dstSize_tooSmall: number;
+        const ZSTD_error_frameParameter_unsupported: number;
+        const ZSTD_error_frameParameter_windowTooLarge: number;
+        const ZSTD_error_init_missing: number;
+        const ZSTD_error_literals_headerWrong: number;
+        const ZSTD_error_maxSymbolValue_tooLarge: number;
+        const ZSTD_error_maxSymbolValue_tooSmall: number;
+        const ZSTD_error_memory_allocation: number;
+        const ZSTD_error_noForwardProgress_destFull: number;
+        const ZSTD_error_noForwardProgress_inputEmpty: number;
+        const ZSTD_error_no_error: number;
+        const ZSTD_error_parameter_combination_unsupported: number;
+        const ZSTD_error_parameter_outOfBound: number;
+        const ZSTD_error_parameter_unsupported: number;
+        const ZSTD_error_prefix_unknown: number;
+        const ZSTD_error_srcSize_wrong: number;
+        const ZSTD_error_stabilityCondition_notRespected: number;
+        const ZSTD_error_stage_wrong: number;
+        const ZSTD_error_tableLog_tooLarge: number;
+        const ZSTD_error_version_unsupported: number;
+        const ZSTD_error_workSpace_tooSmall: number;
+        const ZSTD_fast: number;
+        const ZSTD_greedy: number;
+        const ZSTD_lazy: number;
+        const ZSTD_lazy2: number;
+        const Z_BEST_COMPRESSION: number;
+        const Z_BEST_SPEED: number;
+        const Z_BLOCK: number;
+        const Z_BUF_ERROR: number;
+        const Z_DATA_ERROR: number;
+        const Z_DEFAULT_CHUNK: number;
+        const Z_DEFAULT_COMPRESSION: number;
+        const Z_DEFAULT_LEVEL: number;
+        const Z_DEFAULT_MEMLEVEL: number;
+        const Z_DEFAULT_STRATEGY: number;
+        const Z_DEFAULT_WINDOWBITS: number;
+        const Z_ERRNO: number;
+        const Z_FILTERED: number;
+        const Z_FINISH: number;
+        const Z_FIXED: number;
+        const Z_FULL_FLUSH: number;
+        const Z_HUFFMAN_ONLY: number;
+        const Z_MAX_CHUNK: number;
+        const Z_MAX_LEVEL: number;
+        const Z_MAX_MEMLEVEL: number;
+        const Z_MAX_WINDOWBITS: number;
+        const Z_MEM_ERROR: number;
+        const Z_MIN_CHUNK: number;
+        const Z_MIN_LEVEL: number;
+        const Z_MIN_MEMLEVEL: number;
+        const Z_MIN_WINDOWBITS: number;
+        const Z_NEED_DICT: number;
+        const Z_NO_COMPRESSION: number;
+        const Z_NO_FLUSH: number;
+        const Z_OK: number;
+        const Z_PARTIAL_FLUSH: number;
+        const Z_RLE: number;
+        const Z_STREAM_END: number;
+        const Z_STREAM_ERROR: number;
+        const Z_SYNC_FLUSH: number;
+        const Z_VERSION_ERROR: number;
+    }
+}
+declare module "zlib" {
+    export * from "node:zlib";
+}
diff --git a/mqtt-backend/node_modules/@types/readable-stream/LICENSE b/mqtt-backend/node_modules/@types/readable-stream/LICENSE
new file mode 100644
index 0000000..9e841e7
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/readable-stream/LICENSE
@@ -0,0 +1,21 @@
+    MIT License
+
+    Copyright (c) Microsoft Corporation.
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE
diff --git a/mqtt-backend/node_modules/@types/readable-stream/README.md b/mqtt-backend/node_modules/@types/readable-stream/README.md
new file mode 100644
index 0000000..5ef6e67
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/readable-stream/README.md
@@ -0,0 +1,15 @@
+# Installation
+> `npm install --save @types/readable-stream`
+
+# Summary
+This package contains type definitions for readable-stream (https://github.com/nodejs/readable-stream).
+
+# Details
+Files were exported from https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/readable-stream.
+
+### Additional Details
+ * Last updated: Wed, 10 Dec 2025 19:02:30 GMT
+ * Dependencies: [@types/node](https://npmjs.com/package/@types/node)
+
+# Credits
+These definitions were written by [TeamworkGuy2](https://github.com/TeamworkGuy2), [markdreyer](https://github.com/markdreyer), and [Matteo Collina](https://github.com/mcollina).
diff --git a/mqtt-backend/node_modules/@types/readable-stream/index.d.ts b/mqtt-backend/node_modules/@types/readable-stream/index.d.ts
new file mode 100644
index 0000000..f4cb117
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/readable-stream/index.d.ts
@@ -0,0 +1,686 @@
+/// <reference types="node" />
+
+import NodeStream = require("stream");
+
+declare class StringDecoder {
+    constructor(encoding?: BufferEncoding | string);
+    write(buffer: Buffer): string;
+    end(buffer?: Buffer): string;
+}
+
+type Is<T extends U, U> = T;
+declare var NoAsyncDispose: {
+    new(
+        ...arguments: any[]
+    ): typeof globalThis.Symbol extends { readonly asyncDispose: Is<infer S, symbol> }
+        ? symbol extends S ? {} : { [P in S]: never }
+        : {};
+};
+
+// forward-compatible iterator type for TS <5.6
+declare global {
+    // eslint-disable-next-line @typescript-eslint/no-empty-interface
+    interface AsyncIteratorObject<T, TReturn, TNext> {}
+}
+interface StreamIterator<T> extends AsyncIterator<T, any, any>, AsyncIteratorObject<T, any, any> {
+    [Symbol.asyncIterator](): StreamIterator<T>;
+}
+
+// @types/node's `EventEmitter.listeners()` returns true functions in >=v25, but `Function` objects
+// in <=v24. To maintain assignability to @types/node streams, use whichever variant is present.
+type EventListenerArray = ReturnType<NodeJS.EventEmitter["listeners"]>;
+
+interface _IEventEmitter {
+    addListener(event: string | symbol, listener: (...args: any[]) => void): this;
+    emit(event: string | symbol, ...args: any[]): boolean;
+    on(event: string | symbol, listener: (...args: any[]) => void): this;
+    once(event: string | symbol, listener: (...args: any[]) => void): this;
+    prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
+    prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
+    removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
+    removeAllListeners(event?: string | symbol): this;
+    off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+    setMaxListeners(n: number): this;
+    getMaxListeners(): number;
+    listeners(eventName: string | symbol): EventListenerArray;
+    rawListeners(eventName: string | symbol): EventListenerArray;
+    listenerCount(eventName: string | symbol): number;
+    eventNames(): (string | symbol)[];
+}
+
+interface SignalOption {
+    signal?: AbortSignal;
+}
+interface ArrayOptions extends SignalOption {
+    concurrency?: number;
+}
+
+interface _IReadable extends _IEventEmitter {
+    _read(size: number): void;
+    read(size?: number): any;
+    setEncoding(encoding: string): this;
+    pause(): this;
+    resume(): this;
+    isPaused(): boolean;
+    unpipe(destination?: _Readable.Writable): this;
+    unshift(chunk: any): void;
+    wrap(oldStream: _Readable.Readable): this;
+    push(chunk: any, encoding?: string): boolean;
+    iterator(options?: { destroyOnReturn?: boolean }): StreamIterator<any>;
+    map(fn: (data: any, options?: SignalOption) => any, options?: ArrayOptions): _Readable.Readable;
+    filter(
+        fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>,
+        options?: ArrayOptions,
+    ): _Readable.Readable;
+    forEach(fn: (data: any, options?: SignalOption) => void | Promise<void>, options?: ArrayOptions): Promise<void>;
+    toArray(options?: SignalOption): Promise<any[]>;
+    some(
+        fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>,
+        options?: ArrayOptions,
+    ): Promise<boolean>;
+    find<T>(fn: (data: any, options?: SignalOption) => data is T, options?: ArrayOptions): Promise<T | undefined>;
+    find(fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>, options?: ArrayOptions): Promise<any>;
+    every(
+        fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>,
+        options?: ArrayOptions,
+    ): Promise<boolean>;
+    flatMap(fn: (data: any, options?: SignalOption) => any, options?: ArrayOptions): _Readable.Readable;
+    drop(limit: number, options?: SignalOption): _Readable.Readable;
+    take(limit: number, options?: SignalOption): _Readable.Readable;
+    asIndexedPairs(options?: SignalOption): _Readable.Readable;
+    reduce<T = any>(
+        fn: (previous: any, data: any, options?: Pick<ArrayOptions, "signal">) => T,
+        initial?: undefined,
+        options?: Pick<ArrayOptions, "signal">,
+    ): Promise<T>;
+    reduce<T = any>(
+        fn: (previous: T, data: any, options?: Pick<ArrayOptions, "signal">) => T,
+        initial: T,
+        options?: Pick<ArrayOptions, "signal">,
+    ): Promise<T>;
+    _destroy(error: Error | null, callback: (error?: Error | null) => void): void;
+    destroy(error?: Error): this;
+}
+
+declare class _Readable extends NoAsyncDispose implements _IReadable {
+    readable: boolean;
+    readonly readableFlowing: boolean | null;
+    readonly readableHighWaterMark: number;
+    readonly readableLength: number;
+    readonly closed: boolean;
+    readonly errored: Error | null;
+    static from(iterable: Iterable<any> | AsyncIterable<any>, options?: _Readable.ReadableOptions): _Readable.Readable;
+    _read(size: number): void;
+    read(size?: number): any;
+    setEncoding(encoding: string): this;
+    pause(): this;
+    resume(): this;
+    isPaused(): boolean;
+    unpipe(destination?: _Readable.Writable): this;
+    unshift(chunk: any): void;
+    wrap(oldStream: _Readable.Readable): this;
+    push(chunk: any, encoding?: string): boolean;
+    compose(
+        stream: _Readable.Writable | ((source: any) => void),
+        options?: SignalOption,
+    ): _Readable.Duplex;
+    // (Incorrect) legacy definition from @types/node v18-24, added as an overload
+    // to maintain assignability to @types/node streams when using older versions.
+    compose<T extends NodeJS.ReadableStream>(
+        stream: T | ((source: any) => any) | Iterable<T> | AsyncIterable<T>,
+        options?: { signal: AbortSignal },
+    ): T;
+    map(fn: (data: any, options?: SignalOption) => any, options?: ArrayOptions): _Readable.Readable;
+    filter(
+        fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>,
+        options?: ArrayOptions,
+    ): _Readable.Readable;
+    forEach(fn: (data: any, options?: SignalOption) => void | Promise<void>, options?: ArrayOptions): Promise<void>;
+    toArray(options?: SignalOption): Promise<any[]>;
+    some(
+        fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>,
+        options?: ArrayOptions,
+    ): Promise<boolean>;
+    find<T>(fn: (data: any, options?: SignalOption) => data is T, options?: ArrayOptions): Promise<T | undefined>;
+    find(fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>, options?: ArrayOptions): Promise<any>;
+    every(
+        fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>,
+        options?: ArrayOptions,
+    ): Promise<boolean>;
+    flatMap(fn: (data: any, options?: SignalOption) => any, options?: ArrayOptions): _Readable.Readable;
+    drop(limit: number, options?: SignalOption): _Readable.Readable;
+    take(limit: number, options?: SignalOption): _Readable.Readable;
+    asIndexedPairs(options?: SignalOption): _Readable.Readable;
+    reduce<T = any>(
+        fn: (previous: any, data: any, options?: Pick<ArrayOptions, "signal">) => T,
+        initial?: undefined,
+        options?: Pick<ArrayOptions, "signal">,
+    ): Promise<T>;
+    reduce<T = any>(
+        fn: (previous: T, data: any, options?: Pick<ArrayOptions, "signal">) => T,
+        initial: T,
+        options?: Pick<ArrayOptions, "signal">,
+    ): Promise<T>;
+    _destroy(error: Error | null, callback: (error?: Error | null) => void): void;
+    destroy(error?: Error): this;
+
+    /**
+     * Event emitter
+     * The defined events on documents including:
+     * 1. close
+     * 2. data
+     * 3. end
+     * 4. readable
+     * 5. error
+     */
+    addListener(event: "close", listener: () => void): this;
+    addListener(event: "data", listener: (chunk: any) => void): this;
+    addListener(event: "end", listener: () => void): this;
+    addListener(event: "readable", listener: () => void): this;
+    addListener(event: "error", listener: (err: Error) => void): this;
+    addListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    emit(event: "close"): boolean;
+    emit(event: "data", chunk: any): boolean;
+    emit(event: "end"): boolean;
+    emit(event: "readable"): boolean;
+    emit(event: "error", err: Error): boolean;
+    emit(event: string | symbol, ...args: any[]): boolean;
+
+    on(event: "close", listener: () => void): this;
+    on(event: "data", listener: (chunk: any) => void): this;
+    on(event: "end", listener: () => void): this;
+    on(event: "readable", listener: () => void): this;
+    on(event: "error", listener: (err: Error) => void): this;
+    on(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    once(event: "close", listener: () => void): this;
+    once(event: "data", listener: (chunk: any) => void): this;
+    once(event: "end", listener: () => void): this;
+    once(event: "readable", listener: () => void): this;
+    once(event: "error", listener: (err: Error) => void): this;
+    once(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    prependListener(event: "close", listener: () => void): this;
+    prependListener(event: "data", listener: (chunk: any) => void): this;
+    prependListener(event: "end", listener: () => void): this;
+    prependListener(event: "readable", listener: () => void): this;
+    prependListener(event: "error", listener: (err: Error) => void): this;
+    prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    prependOnceListener(event: "close", listener: () => void): this;
+    prependOnceListener(event: "data", listener: (chunk: any) => void): this;
+    prependOnceListener(event: "end", listener: () => void): this;
+    prependOnceListener(event: "readable", listener: () => void): this;
+    prependOnceListener(event: "error", listener: (err: Error) => void): this;
+    prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    removeListener(event: "close", listener: () => void): this;
+    removeListener(event: "data", listener: (chunk: any) => void): this;
+    removeListener(event: "end", listener: () => void): this;
+    removeListener(event: "readable", listener: () => void): this;
+    removeListener(event: "error", listener: (err: Error) => void): this;
+    removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    removeAllListeners(event?: string | symbol): this;
+    off(eventName: string | symbol, listener: (...args: any[]) => void): this;
+    setMaxListeners(n: number): this;
+    getMaxListeners(): number;
+    listeners(eventName: string | symbol): EventListenerArray;
+    rawListeners(eventName: string | symbol): EventListenerArray;
+    listenerCount(eventName: string | symbol): number;
+    eventNames(): (string | symbol)[];
+
+    iterator(options?: { destroyOnReturn?: boolean }): StreamIterator<any>;
+    [Symbol.asyncIterator](): StreamIterator<any>;
+
+    // static ReadableState: _Readable.ReadableState;
+    _readableState: _Readable.ReadableState;
+    destroyed: boolean;
+
+    constructor(options?: _Readable.ReadableOptions);
+
+    _undestroy(): void;
+}
+
+declare namespace _Readable {
+    // ==== BufferList ====
+    interface Entry<D> {
+        data: D;
+        next: Entry<D> | null;
+    }
+
+    interface BufferList<D extends Buffer = Buffer> {
+        head: Entry<D>;
+        tail: Entry<D>;
+        length: number;
+
+        push(v: D): void;
+        unshift(v: D): void;
+        shift(): D;
+        clear(): void;
+        join(s: any): string;
+        concat(n: number): D;
+    }
+
+    // ==== destroy ====
+    interface Destroy {
+        destroy(
+            this: Readable | Writable,
+            error: Error | null,
+            callback?: (error: Error | null) => void,
+        ): Readable | Writable;
+        undestroy(this: Readable | Writable): void;
+    }
+
+    // ==== _stream_duplex ====
+    type DuplexOptions = ReadableOptions & WritableOptions & {
+        allowHalfOpen?: boolean | undefined;
+        readable?: boolean | undefined;
+        writable?: boolean | undefined;
+        read?(this: Duplex, size: number): void;
+        write?(this: Duplex, chunk: any, encoding: BufferEncoding, callback: (error?: Error | null) => void): void;
+        writev?(
+            this: Duplex,
+            chunks: Array<{ chunk: any; encoding: BufferEncoding }>,
+            callback: (error?: Error | null) => void,
+        ): void;
+        final?(this: Duplex, callback: (error?: Error | null) => void): void;
+        destroy?(this: Duplex, error: Error | null, callback: (error: Error | null) => void): void;
+    };
+
+    type _IDuplex = _IReadable & _IWritable;
+
+    class Duplex extends _Writable implements _IDuplex, /*extends*/ _Readable, Duplex {
+        static from(
+            src:
+                | Stream
+                | Blob
+                | ArrayBuffer
+                | string
+                | Iterable<any>
+                | AsyncIterable<any>
+                | AsyncGeneratorFunction
+                | Promise<any>
+                | { writable?: Writable; readable?: _Readable },
+        ): Duplex;
+        allowHalfOpen: boolean;
+        destroyed: boolean;
+        // Readable
+        readable: boolean;
+        readonly readableEncoding: BufferEncoding | null;
+        readonly readableEnded: boolean;
+        readonly readableFlowing: boolean | null;
+        readonly readableHighWaterMark: number;
+        readonly readableLength: number;
+        readonly readableObjectMode: boolean;
+        readonly writableObjectMode: boolean;
+
+        readonly readableAborted: boolean;
+        readonly readableDidRead: boolean;
+        readonly writableAborted: boolean;
+        readonly writableEnded: boolean;
+        readonly writableFinished: boolean;
+        readonly writableCorked: number;
+
+        _readableState: ReadableState;
+
+        _read(size?: number): void;
+        read(size?: number): any;
+        setEncoding(enc: BufferEncoding): this;
+        resume(): this;
+        pause(): this;
+        isPaused(): boolean;
+        unpipe(dest?: Writable): this;
+        unshift(chunk: any): boolean;
+        wrap(oldStream: Readable): this;
+        push(chunk: any, encoding?: BufferEncoding): boolean;
+        map(fn: (data: any, options?: SignalOption) => any, options?: ArrayOptions): Readable;
+        filter(fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>, options?: ArrayOptions): Readable;
+        forEach(fn: (data: any, options?: SignalOption) => void | Promise<void>, options?: ArrayOptions): Promise<void>;
+        toArray(options?: SignalOption): Promise<any[]>;
+        some(
+            fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>,
+            options?: ArrayOptions,
+        ): Promise<boolean>;
+        find<T>(fn: (data: any, options?: SignalOption) => data is T, options?: ArrayOptions): Promise<T | undefined>;
+        find(
+            fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>,
+            options?: ArrayOptions,
+        ): Promise<any>;
+        every(
+            fn: (data: any, options?: SignalOption) => boolean | Promise<boolean>,
+            options?: ArrayOptions,
+        ): Promise<boolean>;
+        flatMap(fn: (data: any, options?: SignalOption) => any, options?: ArrayOptions): Readable;
+        drop(limit: number, options?: SignalOption): Readable;
+        take(limit: number, options?: SignalOption): Readable;
+        asIndexedPairs(options?: SignalOption): Readable;
+        reduce<T = any>(
+            fn: (previous: any, data: any, options?: Pick<ArrayOptions, "signal">) => T,
+            initial?: undefined,
+            options?: Pick<ArrayOptions, "signal">,
+        ): Promise<T>;
+        reduce<T = any>(
+            fn: (previous: T, data: any, options?: Pick<ArrayOptions, "signal">) => T,
+            initial: T,
+            options?: Pick<ArrayOptions, "signal">,
+        ): Promise<T>;
+        _destroy(err: Error | null, callback: (error: Error | null) => void): void;
+        destroy(err?: Error, callback?: (error: Error | null) => void): this;
+        pipe<S extends NodeJS.WritableStream>(dest: S, pipeOpts?: { end?: boolean | undefined }): S;
+        addListener(ev: string | symbol, fn: (...args: any[]) => void): this;
+        on(ev: string | symbol, fn: (...args: any[]) => void): this;
+
+        _undestroy(): void;
+        iterator(options?: { destroyOnReturn?: boolean }): StreamIterator<any>;
+        [Symbol.asyncIterator](): StreamIterator<any>;
+        // end-Readable
+
+        constructor(options?: DuplexOptions);
+    }
+
+    // ==== _stream_passthrough ====
+    class PassThrough extends Transform {
+        constructor(options?: TransformOptions);
+
+        _transform<T>(
+            chunk: T,
+            encoding: BufferEncoding | string | null | undefined,
+            callback: (error?: Error, data?: T) => void,
+        ): void;
+    }
+
+    // ==== _stream_readable ====
+    interface ReadableStateOptions {
+        defaultEncoding?: BufferEncoding | undefined;
+        encoding?: BufferEncoding | undefined;
+        highWaterMark?: number | undefined;
+        objectMode?: boolean | undefined;
+        readableObjectMode?: boolean | undefined;
+        readableHighWaterMark?: number | undefined;
+    }
+
+    interface ReadableState {
+        objectMode: boolean;
+        highWaterMark: number;
+        buffer: BufferList<any>;
+        length: number;
+        pipes: any;
+        pipesCount: number;
+        flowing: any;
+        ended: boolean;
+        endEmitted: boolean;
+        reading: boolean;
+        sync: boolean;
+        needReadable: boolean;
+        emittedReadable: boolean;
+        readableListening: boolean;
+        resumeScheduled: boolean;
+        destroyed: boolean;
+        awaitDrain: number;
+        defaultEncoding: BufferEncoding;
+        readingMore: boolean;
+        decoder: StringDecoder | null;
+        encoding: BufferEncoding | null;
+
+        // new (options: ReadableStateOptions, stream: _Readable): ReadableState;
+    }
+
+    type ReadableOptions = ReadableStateOptions & {
+        read?(this: _IReadable, size: number): void;
+        destroy?(this: _IReadable, error: Error | null, callback: (error: Error | null) => void): void;
+    };
+
+    class Readable extends _Readable implements NodeJS.ReadableStream {
+        readonly readableAborted: boolean;
+        readonly readableDidRead: boolean;
+        readonly readableEncoding: BufferEncoding | null;
+        readonly readableEnded: boolean;
+        readonly readableObjectMode: boolean;
+
+        constructor(options?: ReadableOptions);
+        pipe<T extends NodeJS.WritableStream>(destination: T, options?: { end?: boolean | undefined }): T;
+    }
+
+    // ==== _stream_transform ====
+    type TransformOptions = ReadableOptions & WritableOptions & {
+        read?(this: _ITransform, size: number): void;
+        write?(this: _ITransform, chunk: any, encoding: BufferEncoding, callback: (error?: Error | null) => void): void;
+        writev?(
+            this: _ITransform,
+            chunks: Array<{ chunk: any; encoding: BufferEncoding }>,
+            callback: (error?: Error | null) => void,
+        ): void;
+        final?(this: _ITransform, callback: (error?: Error | null) => void): void;
+        destroy?(this: _ITransform, error: Error | null, callback: (error: Error | null) => void): void;
+        transform?(
+            this: _ITransform,
+            chunk: any,
+            encoding: BufferEncoding,
+            callback: (error?: Error | null, data?: any) => void,
+        ): void;
+        flush?(callback: (error?: Error | null, data?: any) => void): void;
+    };
+
+    interface _ITransform extends _IDuplex {
+        _transform(chunk: any, encoding: BufferEncoding, callback: (error?: Error | null, data?: any) => void): void;
+        _flush(callback: (error?: Error | null, data?: any) => void): void;
+    }
+
+    class Transform extends Duplex {
+        _transformState: {
+            // eslint-disable-next-line @typescript-eslint/no-invalid-void-type
+            afterTransform: (this: Transform, er: any, data: any) => void | boolean;
+            needTransform: boolean;
+            transforming: boolean;
+            writecb: ((err: any) => any) | null;
+            writechunk: any; // TODO
+            writeencoding: BufferEncoding | null;
+        };
+
+        constructor(options?: TransformOptions);
+
+        _transform(chunk: any, encoding: BufferEncoding, callback: (error?: Error | null, data?: any) => void): void;
+        _flush(callback: (error?: Error | null, data?: any) => void): void;
+    }
+
+    // ==== _stream_writable ====
+    interface CorkedRequest {
+        next: any;
+        entry: any;
+        finish(): void;
+    }
+
+    interface BufferRequest {
+        chunk: any; // TODO
+        encoding: BufferEncoding;
+        isBuf: boolean;
+        callback: (error?: Error | null) => void;
+        next: BufferRequest | null;
+    }
+
+    interface WritableStateOptions {
+        decodeStrings?: boolean | undefined;
+        defaultEncoding?: BufferEncoding | undefined;
+        highWaterMark?: number | undefined;
+        objectMode?: boolean | undefined;
+        writableObjectMode?: boolean | undefined;
+        writableHighWaterMark?: number | undefined;
+    }
+
+    interface WritableState {
+        buffer: BufferRequest[];
+        objectMode: boolean;
+        highWaterMark: number;
+        finalCalled: boolean;
+        needDrain: boolean;
+        ending: boolean;
+        ended: boolean;
+        finished: boolean;
+        destroyed: boolean;
+        decodeStrings: boolean;
+        defaultEncoding: BufferEncoding;
+        length: number;
+        writing: boolean;
+        corked: number;
+        sync: boolean;
+        bufferProcessing: boolean;
+        writelen: number;
+        pendingcb: number;
+        prefinished: boolean;
+        errorEmitted: boolean;
+        bufferedRequestCount: number;
+        writecb: ((err?: Error | null) => void) | null;
+        onwrite: (er?: Error | null) => any;
+        bufferedRequest: BufferRequest | null;
+        lastBufferedRequest: BufferRequest | null;
+        corkedRequestsFree: CorkedRequest;
+
+        // new (options: WritableStateOptions, stream: Writable): WritableState;
+
+        getBuffer(): BufferRequest[];
+    }
+
+    type WritableOptions = WritableStateOptions & {
+        write?(
+            this: _IWritable,
+            chunk: any,
+            encoding: BufferEncoding | string,
+            callback: (error?: Error | null) => void,
+        ): void;
+        writev?(
+            this: _IWritable,
+            chunk: ArrayLike<{ chunk: any; encoding: BufferEncoding | string }>,
+            callback: (error?: Error | null) => void,
+        ): void;
+        destroy?(this: _IWritable, error: Error | null, callback: (error?: Error | null) => void): void;
+        final?(this: _IWritable, callback: (error?: Error | null) => void): void;
+    };
+
+    interface _IWritable extends _IEventEmitter {
+        writable: boolean;
+        write(chunk: any, cb?: (error: Error | null | undefined) => void): boolean;
+        write(chunk: any, encoding?: string, cb?: (error: Error | null | undefined) => void): boolean;
+        end(cb?: () => void): this;
+        end(data: string | Uint8Array, cb?: () => void): this;
+        end(str: string, encoding?: BufferEncoding, cb?: () => void): this;
+    }
+
+    class _Writable extends Stream implements _IWritable, NodeJS.WritableStream {
+        writable: boolean;
+        readonly writableHighWaterMark: number;
+        readonly writableLength: number;
+        readonly closed: boolean;
+        readonly errored: Error | null;
+        readonly writableNeedDrain: boolean;
+        constructor(opts?: WritableOptions);
+        _write(chunk: any, encoding: string, callback: (error?: Error | null) => void): void;
+        _writev?(chunks: Array<{ chunk: any; encoding: string }>, callback: (error?: Error | null) => void): void;
+        _destroy(error: Error | null, callback: (error: Error | null) => void): void;
+        _final(callback: (error?: Error | null) => void): void;
+        write(chunk: any, cb?: (error: Error | null | undefined) => void): boolean;
+        write(chunk: any, encoding?: string, cb?: (error: Error | null | undefined) => void): boolean;
+        setDefaultEncoding(encoding: string): this;
+        end(cb?: () => void): this;
+        end(chunk: any, cb?: () => void): this;
+        end(chunk: any, encoding?: string, cb?: () => void): this;
+        cork(): void;
+        uncork(): void;
+        destroy(error?: Error): this;
+
+        /**
+         * Event emitter
+         * The defined events on documents including:
+         * 1. close
+         * 2. drain
+         * 3. error
+         * 4. finish
+         * 5. pipe
+         * 6. unpipe
+         */
+        addListener(event: "close", listener: () => void): this;
+        addListener(event: "drain", listener: () => void): this;
+        addListener(event: "error", listener: (err: Error) => void): this;
+        addListener(event: "finish", listener: () => void): this;
+        addListener(event: "pipe", listener: (src: Readable) => void): this;
+        addListener(event: "unpipe", listener: (src: Readable) => void): this;
+        addListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+        emit(event: "close"): boolean;
+        emit(event: "drain"): boolean;
+        emit(event: "error", err: Error): boolean;
+        emit(event: "finish"): boolean;
+        emit(event: "pipe", src: Readable): boolean;
+        emit(event: "unpipe", src: Readable): boolean;
+        emit(event: string | symbol, ...args: any[]): boolean;
+
+        on(event: "close", listener: () => void): this;
+        on(event: "drain", listener: () => void): this;
+        on(event: "error", listener: (err: Error) => void): this;
+        on(event: "finish", listener: () => void): this;
+        on(event: "pipe", listener: (src: Readable) => void): this;
+        on(event: "unpipe", listener: (src: Readable) => void): this;
+        on(event: string | symbol, listener: (...args: any[]) => void): this;
+
+        once(event: "close", listener: () => void): this;
+        once(event: "drain", listener: () => void): this;
+        once(event: "error", listener: (err: Error) => void): this;
+        once(event: "finish", listener: () => void): this;
+        once(event: "pipe", listener: (src: Readable) => void): this;
+        once(event: "unpipe", listener: (src: Readable) => void): this;
+        once(event: string | symbol, listener: (...args: any[]) => void): this;
+
+        prependListener(event: "close", listener: () => void): this;
+        prependListener(event: "drain", listener: () => void): this;
+        prependListener(event: "error", listener: (err: Error) => void): this;
+        prependListener(event: "finish", listener: () => void): this;
+        prependListener(event: "pipe", listener: (src: Readable) => void): this;
+        prependListener(event: "unpipe", listener: (src: Readable) => void): this;
+        prependListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+        prependOnceListener(event: "close", listener: () => void): this;
+        prependOnceListener(event: "drain", listener: () => void): this;
+        prependOnceListener(event: "error", listener: (err: Error) => void): this;
+        prependOnceListener(event: "finish", listener: () => void): this;
+        prependOnceListener(event: "pipe", listener: (src: Readable) => void): this;
+        prependOnceListener(event: "unpipe", listener: (src: Readable) => void): this;
+        prependOnceListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+        removeListener(event: "close", listener: () => void): this;
+        removeListener(event: "drain", listener: () => void): this;
+        removeListener(event: "error", listener: (err: Error) => void): this;
+        removeListener(event: "finish", listener: () => void): this;
+        removeListener(event: "pipe", listener: (src: Readable) => void): this;
+        removeListener(event: "unpipe", listener: (src: Readable) => void): this;
+        removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+        // static WritableState: WritableState;
+        // private static realHasInstance: (obj: any) => boolean;
+        destroyed: boolean;
+        _writableState: WritableState;
+
+        _undestroy(): void;
+    }
+
+    class Writable extends _Writable {
+        readonly writableAborted: boolean;
+        readonly writableEnded: boolean;
+        readonly writableFinished: boolean;
+        readonly writableObjectMode: boolean;
+        readonly writableCorked: number;
+
+        constructor(opts?: WritableOptions);
+    }
+
+    class Stream extends _Readable {
+        constructor(options?: ReadableOptions);
+        pipe<T extends NodeJS.WritableStream>(destination: T, options?: { end?: boolean | undefined }): T;
+    }
+
+    const finished: typeof NodeStream.finished;
+    const pipeline: typeof NodeStream.pipeline;
+}
+
+export = _Readable;
+export as namespace _Readable;
diff --git a/mqtt-backend/node_modules/@types/readable-stream/package.json b/mqtt-backend/node_modules/@types/readable-stream/package.json
new file mode 100644
index 0000000..a7c3f39
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/readable-stream/package.json
@@ -0,0 +1,38 @@
+{
+    "name": "@types/readable-stream",
+    "version": "4.0.23",
+    "description": "TypeScript definitions for readable-stream",
+    "homepage": "https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/readable-stream",
+    "license": "MIT",
+    "contributors": [
+        {
+            "name": "TeamworkGuy2",
+            "githubUsername": "TeamworkGuy2",
+            "url": "https://github.com/TeamworkGuy2"
+        },
+        {
+            "name": "markdreyer",
+            "githubUsername": "markdreyer",
+            "url": "https://github.com/markdreyer"
+        },
+        {
+            "name": "Matteo Collina",
+            "githubUsername": "mcollina",
+            "url": "https://github.com/mcollina"
+        }
+    ],
+    "main": "",
+    "types": "index.d.ts",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/DefinitelyTyped/DefinitelyTyped.git",
+        "directory": "types/readable-stream"
+    },
+    "scripts": {},
+    "dependencies": {
+        "@types/node": "*"
+    },
+    "peerDependencies": {},
+    "typesPublisherContentHash": "559e6bb7d063d475a003b828ee4174602d7bda4961f29264109cb48ebae63fab",
+    "typeScriptVersion": "5.2"
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/@types/ws/LICENSE b/mqtt-backend/node_modules/@types/ws/LICENSE
new file mode 100644
index 0000000..9e841e7
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/ws/LICENSE
@@ -0,0 +1,21 @@
+    MIT License
+
+    Copyright (c) Microsoft Corporation.
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE
diff --git a/mqtt-backend/node_modules/@types/ws/README.md b/mqtt-backend/node_modules/@types/ws/README.md
new file mode 100644
index 0000000..3367160
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/ws/README.md
@@ -0,0 +1,15 @@
+# Installation
+> `npm install --save @types/ws`
+
+# Summary
+This package contains type definitions for ws (https://github.com/websockets/ws).
+
+# Details
+Files were exported from https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/ws.
+
+### Additional Details
+ * Last updated: Tue, 01 Apr 2025 02:59:53 GMT
+ * Dependencies: [@types/node](https://npmjs.com/package/@types/node)
+
+# Credits
+These definitions were written by [Paul Loyd](https://github.com/loyd), [Margus Lamp](https://github.com/mlamp), [Philippe D'Alva](https://github.com/TitaneBoy), [reduckted](https://github.com/reduckted), [teidesu](https://github.com/teidesu), [Bartosz Wojtkowiak](https://github.com/wojtkowiak), [Kyle Hensel](https://github.com/k-yle), and [Samuel Skeen](https://github.com/cwadrupldijjit).
diff --git a/mqtt-backend/node_modules/@types/ws/index.d.mts b/mqtt-backend/node_modules/@types/ws/index.d.mts
new file mode 100644
index 0000000..8c5dffb
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/ws/index.d.mts
@@ -0,0 +1,451 @@
+/// <reference types="node" />
+
+import { EventEmitter } from "events";
+import {
+    Agent,
+    ClientRequest,
+    ClientRequestArgs,
+    IncomingMessage,
+    OutgoingHttpHeaders,
+    Server as HTTPServer,
+} from "http";
+import { Server as HTTPSServer } from "https";
+import { createConnection } from "net";
+import { Duplex, DuplexOptions } from "stream";
+import { SecureContextOptions } from "tls";
+import { URL } from "url";
+import { ZlibOptions } from "zlib";
+
+// can not get all overload of BufferConstructor['from'], need to copy all it's first arguments here
+// https://github.com/microsoft/TypeScript/issues/32164
+type BufferLike =
+    | string
+    | Buffer
+    | DataView
+    | number
+    | ArrayBufferView
+    | Uint8Array
+    | ArrayBuffer
+    | SharedArrayBuffer
+    | Blob
+    | readonly any[]
+    | readonly number[]
+    | { valueOf(): ArrayBuffer }
+    | { valueOf(): SharedArrayBuffer }
+    | { valueOf(): Uint8Array }
+    | { valueOf(): readonly number[] }
+    | { valueOf(): string }
+    | { [Symbol.toPrimitive](hint: string): string };
+
+// WebSocket socket.
+declare class WebSocket extends EventEmitter {
+    /** The connection is not yet open. */
+    static readonly CONNECTING: 0;
+    /** The connection is open and ready to communicate. */
+    static readonly OPEN: 1;
+    /** The connection is in the process of closing. */
+    static readonly CLOSING: 2;
+    /** The connection is closed. */
+    static readonly CLOSED: 3;
+
+    binaryType: "nodebuffer" | "arraybuffer" | "fragments";
+    readonly bufferedAmount: number;
+    readonly extensions: string;
+    /** Indicates whether the websocket is paused */
+    readonly isPaused: boolean;
+    readonly protocol: string;
+    /** The current state of the connection */
+    readonly readyState:
+        | typeof WebSocket.CONNECTING
+        | typeof WebSocket.OPEN
+        | typeof WebSocket.CLOSING
+        | typeof WebSocket.CLOSED;
+    readonly url: string;
+
+    /** The connection is not yet open. */
+    readonly CONNECTING: 0;
+    /** The connection is open and ready to communicate. */
+    readonly OPEN: 1;
+    /** The connection is in the process of closing. */
+    readonly CLOSING: 2;
+    /** The connection is closed. */
+    readonly CLOSED: 3;
+
+    onopen: ((event: WebSocket.Event) => void) | null;
+    onerror: ((event: WebSocket.ErrorEvent) => void) | null;
+    onclose: ((event: WebSocket.CloseEvent) => void) | null;
+    onmessage: ((event: WebSocket.MessageEvent) => void) | null;
+
+    constructor(address: null);
+    constructor(address: string | URL, options?: WebSocket.ClientOptions | ClientRequestArgs);
+    constructor(
+        address: string | URL,
+        protocols?: string | string[],
+        options?: WebSocket.ClientOptions | ClientRequestArgs,
+    );
+
+    close(code?: number, data?: string | Buffer): void;
+    ping(data?: any, mask?: boolean, cb?: (err: Error) => void): void;
+    pong(data?: any, mask?: boolean, cb?: (err: Error) => void): void;
+    // https://github.com/websockets/ws/issues/2076#issuecomment-1250354722
+    send(data: BufferLike, cb?: (err?: Error) => void): void;
+    send(
+        data: BufferLike,
+        options: {
+            mask?: boolean | undefined;
+            binary?: boolean | undefined;
+            compress?: boolean | undefined;
+            fin?: boolean | undefined;
+        },
+        cb?: (err?: Error) => void,
+    ): void;
+    terminate(): void;
+
+    /**
+     * Pause the websocket causing it to stop emitting events. Some events can still be
+     * emitted after this is called, until all buffered data is consumed. This method
+     * is a noop if the ready state is `CONNECTING` or `CLOSED`.
+     */
+    pause(): void;
+    /**
+     * Make a paused socket resume emitting events. This method is a noop if the ready
+     * state is `CONNECTING` or `CLOSED`.
+     */
+    resume(): void;
+
+    // HTML5 WebSocket events
+    addEventListener<K extends keyof WebSocket.WebSocketEventMap>(
+        type: K,
+        listener:
+            | ((event: WebSocket.WebSocketEventMap[K]) => void)
+            | { handleEvent(event: WebSocket.WebSocketEventMap[K]): void },
+        options?: WebSocket.EventListenerOptions,
+    ): void;
+    removeEventListener<K extends keyof WebSocket.WebSocketEventMap>(
+        type: K,
+        listener:
+            | ((event: WebSocket.WebSocketEventMap[K]) => void)
+            | { handleEvent(event: WebSocket.WebSocketEventMap[K]): void },
+    ): void;
+
+    // Events
+    on(event: "close", listener: (this: WebSocket, code: number, reason: Buffer) => void): this;
+    on(event: "error", listener: (this: WebSocket, error: Error) => void): this;
+    on(event: "upgrade", listener: (this: WebSocket, request: IncomingMessage) => void): this;
+    on(event: "message", listener: (this: WebSocket, data: WebSocket.RawData, isBinary: boolean) => void): this;
+    on(event: "open", listener: (this: WebSocket) => void): this;
+    on(event: "ping" | "pong", listener: (this: WebSocket, data: Buffer) => void): this;
+    on(event: "redirect", listener: (this: WebSocket, url: string, request: ClientRequest) => void): this;
+    on(
+        event: "unexpected-response",
+        listener: (this: WebSocket, request: ClientRequest, response: IncomingMessage) => void,
+    ): this;
+    on(event: string | symbol, listener: (this: WebSocket, ...args: any[]) => void): this;
+
+    once(event: "close", listener: (this: WebSocket, code: number, reason: Buffer) => void): this;
+    once(event: "error", listener: (this: WebSocket, error: Error) => void): this;
+    once(event: "upgrade", listener: (this: WebSocket, request: IncomingMessage) => void): this;
+    once(event: "message", listener: (this: WebSocket, data: WebSocket.RawData, isBinary: boolean) => void): this;
+    once(event: "open", listener: (this: WebSocket) => void): this;
+    once(event: "ping" | "pong", listener: (this: WebSocket, data: Buffer) => void): this;
+    once(event: "redirect", listener: (this: WebSocket, url: string, request: ClientRequest) => void): this;
+    once(
+        event: "unexpected-response",
+        listener: (this: WebSocket, request: ClientRequest, response: IncomingMessage) => void,
+    ): this;
+    once(event: string | symbol, listener: (this: WebSocket, ...args: any[]) => void): this;
+
+    off(event: "close", listener: (this: WebSocket, code: number, reason: Buffer) => void): this;
+    off(event: "error", listener: (this: WebSocket, error: Error) => void): this;
+    off(event: "upgrade", listener: (this: WebSocket, request: IncomingMessage) => void): this;
+    off(event: "message", listener: (this: WebSocket, data: WebSocket.RawData, isBinary: boolean) => void): this;
+    off(event: "open", listener: (this: WebSocket) => void): this;
+    off(event: "ping" | "pong", listener: (this: WebSocket, data: Buffer) => void): this;
+    off(event: "redirect", listener: (this: WebSocket, url: string, request: ClientRequest) => void): this;
+    off(
+        event: "unexpected-response",
+        listener: (this: WebSocket, request: ClientRequest, response: IncomingMessage) => void,
+    ): this;
+    off(event: string | symbol, listener: (this: WebSocket, ...args: any[]) => void): this;
+
+    addListener(event: "close", listener: (code: number, reason: Buffer) => void): this;
+    addListener(event: "error", listener: (error: Error) => void): this;
+    addListener(event: "upgrade", listener: (request: IncomingMessage) => void): this;
+    addListener(event: "message", listener: (data: WebSocket.RawData, isBinary: boolean) => void): this;
+    addListener(event: "open", listener: () => void): this;
+    addListener(event: "ping" | "pong", listener: (data: Buffer) => void): this;
+    addListener(event: "redirect", listener: (url: string, request: ClientRequest) => void): this;
+    addListener(
+        event: "unexpected-response",
+        listener: (request: ClientRequest, response: IncomingMessage) => void,
+    ): this;
+    addListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    removeListener(event: "close", listener: (code: number, reason: Buffer) => void): this;
+    removeListener(event: "error", listener: (error: Error) => void): this;
+    removeListener(event: "upgrade", listener: (request: IncomingMessage) => void): this;
+    removeListener(event: "message", listener: (data: WebSocket.RawData, isBinary: boolean) => void): this;
+    removeListener(event: "open", listener: () => void): this;
+    removeListener(event: "ping" | "pong", listener: (data: Buffer) => void): this;
+    removeListener(event: "redirect", listener: (url: string, request: ClientRequest) => void): this;
+    removeListener(
+        event: "unexpected-response",
+        listener: (request: ClientRequest, response: IncomingMessage) => void,
+    ): this;
+    removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
+}
+
+declare namespace WebSocket {
+    /**
+     * Data represents the raw message payload received over the WebSocket.
+     */
+    type RawData = Buffer | ArrayBuffer | Buffer[];
+
+    /**
+     * Data represents the message payload received over the WebSocket.
+     */
+    type Data = string | Buffer | ArrayBuffer | Buffer[];
+
+    /**
+     * CertMeta represents the accepted types for certificate & key data.
+     */
+    type CertMeta = string | string[] | Buffer | Buffer[];
+
+    /**
+     * VerifyClientCallbackSync is a synchronous callback used to inspect the
+     * incoming message. The return value (boolean) of the function determines
+     * whether or not to accept the handshake.
+     */
+    type VerifyClientCallbackSync<Request extends IncomingMessage = IncomingMessage> = (info: {
+        origin: string;
+        secure: boolean;
+        req: Request;
+    }) => boolean;
+
+    /**
+     * VerifyClientCallbackAsync is an asynchronous callback used to inspect the
+     * incoming message. The return value (boolean) of the function determines
+     * whether or not to accept the handshake.
+     */
+    type VerifyClientCallbackAsync<Request extends IncomingMessage = IncomingMessage> = (
+        info: { origin: string; secure: boolean; req: Request },
+        callback: (res: boolean, code?: number, message?: string, headers?: OutgoingHttpHeaders) => void,
+    ) => void;
+
+    /**
+     * FinishRequestCallback is a callback for last minute customization of the
+     * headers. If finishRequest is set, then it has the responsibility to call
+     * request.end() once it is done setting request headers.
+     */
+    type FinishRequestCallback = (request: ClientRequest, websocket: WebSocket) => void;
+
+    interface ClientOptions extends SecureContextOptions {
+        protocol?: string | undefined;
+        followRedirects?: boolean | undefined;
+        generateMask?(mask: Buffer): void;
+        handshakeTimeout?: number | undefined;
+        maxRedirects?: number | undefined;
+        perMessageDeflate?: boolean | PerMessageDeflateOptions | undefined;
+        localAddress?: string | undefined;
+        protocolVersion?: number | undefined;
+        headers?: { [key: string]: string } | undefined;
+        origin?: string | undefined;
+        agent?: Agent | undefined;
+        host?: string | undefined;
+        family?: number | undefined;
+        checkServerIdentity?(servername: string, cert: CertMeta): boolean;
+        rejectUnauthorized?: boolean | undefined;
+        allowSynchronousEvents?: boolean | undefined;
+        autoPong?: boolean | undefined;
+        maxPayload?: number | undefined;
+        skipUTF8Validation?: boolean | undefined;
+        createConnection?: typeof createConnection | undefined;
+        finishRequest?: FinishRequestCallback | undefined;
+    }
+
+    interface PerMessageDeflateOptions {
+        serverNoContextTakeover?: boolean | undefined;
+        clientNoContextTakeover?: boolean | undefined;
+        serverMaxWindowBits?: number | undefined;
+        clientMaxWindowBits?: number | undefined;
+        zlibDeflateOptions?:
+            | {
+                flush?: number | undefined;
+                finishFlush?: number | undefined;
+                chunkSize?: number | undefined;
+                windowBits?: number | undefined;
+                level?: number | undefined;
+                memLevel?: number | undefined;
+                strategy?: number | undefined;
+                dictionary?: Buffer | Buffer[] | DataView | undefined;
+                info?: boolean | undefined;
+            }
+            | undefined;
+        zlibInflateOptions?: ZlibOptions | undefined;
+        threshold?: number | undefined;
+        concurrencyLimit?: number | undefined;
+    }
+
+    interface Event {
+        type: string;
+        target: WebSocket;
+    }
+
+    interface ErrorEvent {
+        error: any;
+        message: string;
+        type: string;
+        target: WebSocket;
+    }
+
+    interface CloseEvent {
+        wasClean: boolean;
+        code: number;
+        reason: string;
+        type: string;
+        target: WebSocket;
+    }
+
+    interface MessageEvent {
+        data: Data;
+        type: string;
+        target: WebSocket;
+    }
+
+    interface WebSocketEventMap {
+        open: Event;
+        error: ErrorEvent;
+        close: CloseEvent;
+        message: MessageEvent;
+    }
+
+    interface EventListenerOptions {
+        once?: boolean | undefined;
+    }
+
+    interface ServerOptions<
+        U extends typeof WebSocket = typeof WebSocket,
+        V extends typeof IncomingMessage = typeof IncomingMessage,
+    > {
+        host?: string | undefined;
+        port?: number | undefined;
+        backlog?: number | undefined;
+        server?: HTTPServer<V> | HTTPSServer<V> | undefined;
+        verifyClient?:
+            | VerifyClientCallbackAsync<InstanceType<V>>
+            | VerifyClientCallbackSync<InstanceType<V>>
+            | undefined;
+        handleProtocols?: (protocols: Set<string>, request: InstanceType<V>) => string | false;
+        path?: string | undefined;
+        noServer?: boolean | undefined;
+        allowSynchronousEvents?: boolean | undefined;
+        autoPong?: boolean | undefined;
+        clientTracking?: boolean | undefined;
+        perMessageDeflate?: boolean | PerMessageDeflateOptions | undefined;
+        maxPayload?: number | undefined;
+        skipUTF8Validation?: boolean | undefined;
+        WebSocket?: U | undefined;
+    }
+
+    interface AddressInfo {
+        address: string;
+        family: string;
+        port: number;
+    }
+}
+
+export import AddressInfo = WebSocket.AddressInfo;
+export import CertMeta = WebSocket.CertMeta;
+export import ClientOptions = WebSocket.ClientOptions;
+export import CloseEvent = WebSocket.CloseEvent;
+export import Data = WebSocket.Data;
+export import ErrorEvent = WebSocket.ErrorEvent;
+export import Event = WebSocket.Event;
+export import EventListenerOptions = WebSocket.EventListenerOptions;
+export import FinishRequestCallback = WebSocket.FinishRequestCallback;
+export import MessageEvent = WebSocket.MessageEvent;
+export import PerMessageDeflateOptions = WebSocket.PerMessageDeflateOptions;
+export import RawData = WebSocket.RawData;
+export import ServerOptions = WebSocket.ServerOptions;
+export import VerifyClientCallbackAsync = WebSocket.VerifyClientCallbackAsync;
+export import VerifyClientCallbackSync = WebSocket.VerifyClientCallbackSync;
+
+// WebSocket Server
+declare class Server<
+    T extends typeof WebSocket = typeof WebSocket,
+    U extends typeof IncomingMessage = typeof IncomingMessage,
+> extends EventEmitter {
+    options: WebSocket.ServerOptions<T, U>;
+    path: string;
+    clients: Set<InstanceType<T>>;
+
+    constructor(options?: WebSocket.ServerOptions<T, U>, callback?: () => void);
+
+    address(): WebSocket.AddressInfo | string | null;
+    close(cb?: (err?: Error) => void): void;
+    handleUpgrade(
+        request: InstanceType<U>,
+        socket: Duplex,
+        upgradeHead: Buffer,
+        callback: (client: InstanceType<T>, request: InstanceType<U>) => void,
+    ): void;
+    shouldHandle(request: InstanceType<U>): boolean | Promise<boolean>;
+
+    // Events
+    on(event: "connection", cb: (this: Server<T>, websocket: InstanceType<T>, request: InstanceType<U>) => void): this;
+    on(event: "error", cb: (this: Server<T>, error: Error) => void): this;
+    on(event: "headers", cb: (this: Server<T>, headers: string[], request: InstanceType<U>) => void): this;
+    on(event: "close" | "listening", cb: (this: Server<T>) => void): this;
+    on(
+        event: "wsClientError",
+        cb: (this: Server<T>, error: Error, socket: Duplex, request: InstanceType<U>) => void,
+    ): this;
+    on(event: string | symbol, listener: (this: Server<T>, ...args: any[]) => void): this;
+
+    once(
+        event: "connection",
+        cb: (this: Server<T>, websocket: InstanceType<T>, request: InstanceType<U>) => void,
+    ): this;
+    once(event: "error", cb: (this: Server<T>, error: Error) => void): this;
+    once(event: "headers", cb: (this: Server<T>, headers: string[], request: InstanceType<U>) => void): this;
+    once(event: "close" | "listening", cb: (this: Server<T>) => void): this;
+    once(
+        event: "wsClientError",
+        cb: (this: Server<T>, error: Error, socket: Duplex, request: InstanceType<U>) => void,
+    ): this;
+    once(event: string | symbol, listener: (this: Server<T>, ...args: any[]) => void): this;
+
+    off(event: "connection", cb: (this: Server<T>, websocket: InstanceType<T>, request: InstanceType<U>) => void): this;
+    off(event: "error", cb: (this: Server<T>, error: Error) => void): this;
+    off(event: "headers", cb: (this: Server<T>, headers: string[], request: InstanceType<U>) => void): this;
+    off(event: "close" | "listening", cb: (this: Server<T>) => void): this;
+    off(
+        event: "wsClientError",
+        cb: (this: Server<T>, error: Error, socket: Duplex, request: InstanceType<U>) => void,
+    ): this;
+    off(event: string | symbol, listener: (this: Server<T>, ...args: any[]) => void): this;
+
+    addListener(event: "connection", cb: (websocket: InstanceType<T>, request: InstanceType<U>) => void): this;
+    addListener(event: "error", cb: (error: Error) => void): this;
+    addListener(event: "headers", cb: (headers: string[], request: InstanceType<U>) => void): this;
+    addListener(event: "close" | "listening", cb: () => void): this;
+    addListener(event: "wsClientError", cb: (error: Error, socket: Duplex, request: InstanceType<U>) => void): this;
+    addListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    removeListener(event: "connection", cb: (websocket: InstanceType<T>, request: InstanceType<U>) => void): this;
+    removeListener(event: "error", cb: (error: Error) => void): this;
+    removeListener(event: "headers", cb: (headers: string[], request: InstanceType<U>) => void): this;
+    removeListener(event: "close" | "listening", cb: () => void): this;
+    removeListener(event: "wsClientError", cb: (error: Error, socket: Duplex, request: InstanceType<U>) => void): this;
+    removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
+}
+export { type Server };
+
+export const WebSocketServer: typeof Server;
+export interface WebSocketServer extends Server {} // eslint-disable-line @typescript-eslint/no-empty-interface
+
+// WebSocket stream
+export function createWebSocketStream(websocket: WebSocket, options?: DuplexOptions): Duplex;
+
+export default WebSocket;
+export { WebSocket };
diff --git a/mqtt-backend/node_modules/@types/ws/index.d.ts b/mqtt-backend/node_modules/@types/ws/index.d.ts
new file mode 100644
index 0000000..6d08adc
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/ws/index.d.ts
@@ -0,0 +1,445 @@
+/// <reference types="node" />
+
+import { EventEmitter } from "events";
+import {
+    Agent,
+    ClientRequest,
+    ClientRequestArgs,
+    IncomingMessage,
+    OutgoingHttpHeaders,
+    Server as HTTPServer,
+} from "http";
+import { Server as HTTPSServer } from "https";
+import { createConnection } from "net";
+import { Duplex, DuplexOptions } from "stream";
+import { SecureContextOptions } from "tls";
+import { URL } from "url";
+import { ZlibOptions } from "zlib";
+
+// can not get all overload of BufferConstructor['from'], need to copy all it's first arguments here
+// https://github.com/microsoft/TypeScript/issues/32164
+type BufferLike =
+    | string
+    | Buffer
+    | DataView
+    | number
+    | ArrayBufferView
+    | Uint8Array
+    | ArrayBuffer
+    | SharedArrayBuffer
+    | Blob
+    | readonly any[]
+    | readonly number[]
+    | { valueOf(): ArrayBuffer }
+    | { valueOf(): SharedArrayBuffer }
+    | { valueOf(): Uint8Array }
+    | { valueOf(): readonly number[] }
+    | { valueOf(): string }
+    | { [Symbol.toPrimitive](hint: string): string };
+
+// WebSocket socket.
+declare class WebSocket extends EventEmitter {
+    /** The connection is not yet open. */
+    static readonly CONNECTING: 0;
+    /** The connection is open and ready to communicate. */
+    static readonly OPEN: 1;
+    /** The connection is in the process of closing. */
+    static readonly CLOSING: 2;
+    /** The connection is closed. */
+    static readonly CLOSED: 3;
+
+    binaryType: "nodebuffer" | "arraybuffer" | "fragments";
+    readonly bufferedAmount: number;
+    readonly extensions: string;
+    /** Indicates whether the websocket is paused */
+    readonly isPaused: boolean;
+    readonly protocol: string;
+    /** The current state of the connection */
+    readonly readyState:
+        | typeof WebSocket.CONNECTING
+        | typeof WebSocket.OPEN
+        | typeof WebSocket.CLOSING
+        | typeof WebSocket.CLOSED;
+    readonly url: string;
+
+    /** The connection is not yet open. */
+    readonly CONNECTING: 0;
+    /** The connection is open and ready to communicate. */
+    readonly OPEN: 1;
+    /** The connection is in the process of closing. */
+    readonly CLOSING: 2;
+    /** The connection is closed. */
+    readonly CLOSED: 3;
+
+    onopen: ((event: WebSocket.Event) => void) | null;
+    onerror: ((event: WebSocket.ErrorEvent) => void) | null;
+    onclose: ((event: WebSocket.CloseEvent) => void) | null;
+    onmessage: ((event: WebSocket.MessageEvent) => void) | null;
+
+    constructor(address: null);
+    constructor(address: string | URL, options?: WebSocket.ClientOptions | ClientRequestArgs);
+    constructor(
+        address: string | URL,
+        protocols?: string | string[],
+        options?: WebSocket.ClientOptions | ClientRequestArgs,
+    );
+
+    close(code?: number, data?: string | Buffer): void;
+    ping(data?: any, mask?: boolean, cb?: (err: Error) => void): void;
+    pong(data?: any, mask?: boolean, cb?: (err: Error) => void): void;
+    // https://github.com/websockets/ws/issues/2076#issuecomment-1250354722
+    send(data: BufferLike, cb?: (err?: Error) => void): void;
+    send(
+        data: BufferLike,
+        options: {
+            mask?: boolean | undefined;
+            binary?: boolean | undefined;
+            compress?: boolean | undefined;
+            fin?: boolean | undefined;
+        },
+        cb?: (err?: Error) => void,
+    ): void;
+    terminate(): void;
+
+    /**
+     * Pause the websocket causing it to stop emitting events. Some events can still be
+     * emitted after this is called, until all buffered data is consumed. This method
+     * is a noop if the ready state is `CONNECTING` or `CLOSED`.
+     */
+    pause(): void;
+    /**
+     * Make a paused socket resume emitting events. This method is a noop if the ready
+     * state is `CONNECTING` or `CLOSED`.
+     */
+    resume(): void;
+
+    // HTML5 WebSocket events
+    addEventListener<K extends keyof WebSocket.WebSocketEventMap>(
+        type: K,
+        listener:
+            | ((event: WebSocket.WebSocketEventMap[K]) => void)
+            | { handleEvent(event: WebSocket.WebSocketEventMap[K]): void },
+        options?: WebSocket.EventListenerOptions,
+    ): void;
+    removeEventListener<K extends keyof WebSocket.WebSocketEventMap>(
+        type: K,
+        listener:
+            | ((event: WebSocket.WebSocketEventMap[K]) => void)
+            | { handleEvent(event: WebSocket.WebSocketEventMap[K]): void },
+    ): void;
+
+    // Events
+    on(event: "close", listener: (this: WebSocket, code: number, reason: Buffer) => void): this;
+    on(event: "error", listener: (this: WebSocket, error: Error) => void): this;
+    on(event: "upgrade", listener: (this: WebSocket, request: IncomingMessage) => void): this;
+    on(event: "message", listener: (this: WebSocket, data: WebSocket.RawData, isBinary: boolean) => void): this;
+    on(event: "open", listener: (this: WebSocket) => void): this;
+    on(event: "ping" | "pong", listener: (this: WebSocket, data: Buffer) => void): this;
+    on(event: "redirect", listener: (this: WebSocket, url: string, request: ClientRequest) => void): this;
+    on(
+        event: "unexpected-response",
+        listener: (this: WebSocket, request: ClientRequest, response: IncomingMessage) => void,
+    ): this;
+    on(event: string | symbol, listener: (this: WebSocket, ...args: any[]) => void): this;
+
+    once(event: "close", listener: (this: WebSocket, code: number, reason: Buffer) => void): this;
+    once(event: "error", listener: (this: WebSocket, error: Error) => void): this;
+    once(event: "upgrade", listener: (this: WebSocket, request: IncomingMessage) => void): this;
+    once(event: "message", listener: (this: WebSocket, data: WebSocket.RawData, isBinary: boolean) => void): this;
+    once(event: "open", listener: (this: WebSocket) => void): this;
+    once(event: "ping" | "pong", listener: (this: WebSocket, data: Buffer) => void): this;
+    once(event: "redirect", listener: (this: WebSocket, url: string, request: ClientRequest) => void): this;
+    once(
+        event: "unexpected-response",
+        listener: (this: WebSocket, request: ClientRequest, response: IncomingMessage) => void,
+    ): this;
+    once(event: string | symbol, listener: (this: WebSocket, ...args: any[]) => void): this;
+
+    off(event: "close", listener: (this: WebSocket, code: number, reason: Buffer) => void): this;
+    off(event: "error", listener: (this: WebSocket, error: Error) => void): this;
+    off(event: "upgrade", listener: (this: WebSocket, request: IncomingMessage) => void): this;
+    off(event: "message", listener: (this: WebSocket, data: WebSocket.RawData, isBinary: boolean) => void): this;
+    off(event: "open", listener: (this: WebSocket) => void): this;
+    off(event: "ping" | "pong", listener: (this: WebSocket, data: Buffer) => void): this;
+    off(event: "redirect", listener: (this: WebSocket, url: string, request: ClientRequest) => void): this;
+    off(
+        event: "unexpected-response",
+        listener: (this: WebSocket, request: ClientRequest, response: IncomingMessage) => void,
+    ): this;
+    off(event: string | symbol, listener: (this: WebSocket, ...args: any[]) => void): this;
+
+    addListener(event: "close", listener: (code: number, reason: Buffer) => void): this;
+    addListener(event: "error", listener: (error: Error) => void): this;
+    addListener(event: "upgrade", listener: (request: IncomingMessage) => void): this;
+    addListener(event: "message", listener: (data: WebSocket.RawData, isBinary: boolean) => void): this;
+    addListener(event: "open", listener: () => void): this;
+    addListener(event: "ping" | "pong", listener: (data: Buffer) => void): this;
+    addListener(event: "redirect", listener: (url: string, request: ClientRequest) => void): this;
+    addListener(
+        event: "unexpected-response",
+        listener: (request: ClientRequest, response: IncomingMessage) => void,
+    ): this;
+    addListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+    removeListener(event: "close", listener: (code: number, reason: Buffer) => void): this;
+    removeListener(event: "error", listener: (error: Error) => void): this;
+    removeListener(event: "upgrade", listener: (request: IncomingMessage) => void): this;
+    removeListener(event: "message", listener: (data: WebSocket.RawData, isBinary: boolean) => void): this;
+    removeListener(event: "open", listener: () => void): this;
+    removeListener(event: "ping" | "pong", listener: (data: Buffer) => void): this;
+    removeListener(event: "redirect", listener: (url: string, request: ClientRequest) => void): this;
+    removeListener(
+        event: "unexpected-response",
+        listener: (request: ClientRequest, response: IncomingMessage) => void,
+    ): this;
+    removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
+}
+
+declare const WebSocketAlias: typeof WebSocket;
+interface WebSocketAlias extends WebSocket {} // eslint-disable-line @typescript-eslint/no-empty-interface
+
+declare namespace WebSocket {
+    /**
+     * Data represents the raw message payload received over the WebSocket.
+     */
+    type RawData = Buffer | ArrayBuffer | Buffer[];
+
+    /**
+     * Data represents the message payload received over the WebSocket.
+     */
+    type Data = string | Buffer | ArrayBuffer | Buffer[];
+
+    /**
+     * CertMeta represents the accepted types for certificate & key data.
+     */
+    type CertMeta = string | string[] | Buffer | Buffer[];
+
+    /**
+     * VerifyClientCallbackSync is a synchronous callback used to inspect the
+     * incoming message. The return value (boolean) of the function determines
+     * whether or not to accept the handshake.
+     */
+    type VerifyClientCallbackSync<Request extends IncomingMessage = IncomingMessage> = (info: {
+        origin: string;
+        secure: boolean;
+        req: Request;
+    }) => boolean;
+
+    /**
+     * VerifyClientCallbackAsync is an asynchronous callback used to inspect the
+     * incoming message. The return value (boolean) of the function determines
+     * whether or not to accept the handshake.
+     */
+    type VerifyClientCallbackAsync<Request extends IncomingMessage = IncomingMessage> = (
+        info: { origin: string; secure: boolean; req: Request },
+        callback: (res: boolean, code?: number, message?: string, headers?: OutgoingHttpHeaders) => void,
+    ) => void;
+
+    /**
+     * FinishRequestCallback is a callback for last minute customization of the
+     * headers. If finishRequest is set, then it has the responsibility to call
+     * request.end() once it is done setting request headers.
+     */
+    type FinishRequestCallback = (request: ClientRequest, websocket: WebSocket) => void;
+
+    interface ClientOptions extends SecureContextOptions {
+        protocol?: string | undefined;
+        followRedirects?: boolean | undefined;
+        generateMask?(mask: Buffer): void;
+        handshakeTimeout?: number | undefined;
+        maxRedirects?: number | undefined;
+        perMessageDeflate?: boolean | PerMessageDeflateOptions | undefined;
+        localAddress?: string | undefined;
+        protocolVersion?: number | undefined;
+        headers?: { [key: string]: string } | undefined;
+        origin?: string | undefined;
+        agent?: Agent | undefined;
+        host?: string | undefined;
+        family?: number | undefined;
+        checkServerIdentity?(servername: string, cert: CertMeta): boolean;
+        rejectUnauthorized?: boolean | undefined;
+        allowSynchronousEvents?: boolean | undefined;
+        autoPong?: boolean | undefined;
+        maxPayload?: number | undefined;
+        skipUTF8Validation?: boolean | undefined;
+        createConnection?: typeof createConnection | undefined;
+        finishRequest?: FinishRequestCallback | undefined;
+    }
+
+    interface PerMessageDeflateOptions {
+        serverNoContextTakeover?: boolean | undefined;
+        clientNoContextTakeover?: boolean | undefined;
+        serverMaxWindowBits?: number | undefined;
+        clientMaxWindowBits?: number | undefined;
+        zlibDeflateOptions?: {
+            flush?: number | undefined;
+            finishFlush?: number | undefined;
+            chunkSize?: number | undefined;
+            windowBits?: number | undefined;
+            level?: number | undefined;
+            memLevel?: number | undefined;
+            strategy?: number | undefined;
+            dictionary?: Buffer | Buffer[] | DataView | undefined;
+            info?: boolean | undefined;
+        } | undefined;
+        zlibInflateOptions?: ZlibOptions | undefined;
+        threshold?: number | undefined;
+        concurrencyLimit?: number | undefined;
+    }
+
+    interface Event {
+        type: string;
+        target: WebSocket;
+    }
+
+    interface ErrorEvent {
+        error: any;
+        message: string;
+        type: string;
+        target: WebSocket;
+    }
+
+    interface CloseEvent {
+        wasClean: boolean;
+        code: number;
+        reason: string;
+        type: string;
+        target: WebSocket;
+    }
+
+    interface MessageEvent {
+        data: Data;
+        type: string;
+        target: WebSocket;
+    }
+
+    interface WebSocketEventMap {
+        open: Event;
+        error: ErrorEvent;
+        close: CloseEvent;
+        message: MessageEvent;
+    }
+
+    interface EventListenerOptions {
+        once?: boolean | undefined;
+    }
+
+    interface ServerOptions<
+        U extends typeof WebSocket.WebSocket = typeof WebSocket.WebSocket,
+        V extends typeof IncomingMessage = typeof IncomingMessage,
+    > {
+        host?: string | undefined;
+        port?: number | undefined;
+        backlog?: number | undefined;
+        server?: HTTPServer<V> | HTTPSServer<V> | undefined;
+        verifyClient?:
+            | VerifyClientCallbackAsync<InstanceType<V>>
+            | VerifyClientCallbackSync<InstanceType<V>>
+            | undefined;
+        handleProtocols?: (protocols: Set<string>, request: InstanceType<V>) => string | false;
+        path?: string | undefined;
+        noServer?: boolean | undefined;
+        allowSynchronousEvents?: boolean | undefined;
+        autoPong?: boolean | undefined;
+        clientTracking?: boolean | undefined;
+        perMessageDeflate?: boolean | PerMessageDeflateOptions | undefined;
+        maxPayload?: number | undefined;
+        skipUTF8Validation?: boolean | undefined;
+        WebSocket?: U | undefined;
+    }
+
+    interface AddressInfo {
+        address: string;
+        family: string;
+        port: number;
+    }
+
+    // WebSocket Server
+    class Server<
+        T extends typeof WebSocket.WebSocket = typeof WebSocket.WebSocket,
+        U extends typeof IncomingMessage = typeof IncomingMessage,
+    > extends EventEmitter {
+        options: ServerOptions<T, U>;
+        path: string;
+        clients: Set<InstanceType<T>>;
+
+        constructor(options?: ServerOptions<T, U>, callback?: () => void);
+
+        address(): AddressInfo | string | null;
+        close(cb?: (err?: Error) => void): void;
+        handleUpgrade(
+            request: InstanceType<U>,
+            socket: Duplex,
+            upgradeHead: Buffer,
+            callback: (client: InstanceType<T>, request: InstanceType<U>) => void,
+        ): void;
+        shouldHandle(request: InstanceType<U>): boolean | Promise<boolean>;
+
+        // Events
+        on(
+            event: "connection",
+            cb: (this: Server<T>, websocket: InstanceType<T>, request: InstanceType<U>) => void,
+        ): this;
+        on(event: "error", cb: (this: Server<T>, error: Error) => void): this;
+        on(event: "headers", cb: (this: Server<T>, headers: string[], request: InstanceType<U>) => void): this;
+        on(event: "close" | "listening", cb: (this: Server<T>) => void): this;
+        on(
+            event: "wsClientError",
+            cb: (this: Server<T>, error: Error, socket: Duplex, request: InstanceType<U>) => void,
+        ): this;
+        on(event: string | symbol, listener: (this: Server<T>, ...args: any[]) => void): this;
+
+        once(
+            event: "connection",
+            cb: (this: Server<T>, websocket: InstanceType<T>, request: InstanceType<U>) => void,
+        ): this;
+        once(event: "error", cb: (this: Server<T>, error: Error) => void): this;
+        once(event: "headers", cb: (this: Server<T>, headers: string[], request: InstanceType<U>) => void): this;
+        once(event: "close" | "listening", cb: (this: Server<T>) => void): this;
+        once(
+            event: "wsClientError",
+            cb: (this: Server<T>, error: Error, socket: Duplex, request: InstanceType<U>) => void,
+        ): this;
+        once(event: string | symbol, listener: (this: Server<T>, ...args: any[]) => void): this;
+
+        off(
+            event: "connection",
+            cb: (this: Server<T>, socket: InstanceType<T>, request: InstanceType<U>) => void,
+        ): this;
+        off(event: "error", cb: (this: Server<T>, error: Error) => void): this;
+        off(event: "headers", cb: (this: Server<T>, headers: string[], request: InstanceType<U>) => void): this;
+        off(event: "close" | "listening", cb: (this: Server<T>) => void): this;
+        off(
+            event: "wsClientError",
+            cb: (this: Server<T>, error: Error, socket: Duplex, request: InstanceType<U>) => void,
+        ): this;
+        off(event: string | symbol, listener: (this: Server<T>, ...args: any[]) => void): this;
+
+        addListener(event: "connection", cb: (websocket: InstanceType<T>, request: InstanceType<U>) => void): this;
+        addListener(event: "error", cb: (error: Error) => void): this;
+        addListener(event: "headers", cb: (headers: string[], request: InstanceType<U>) => void): this;
+        addListener(event: "close" | "listening", cb: () => void): this;
+        addListener(event: "wsClientError", cb: (error: Error, socket: Duplex, request: InstanceType<U>) => void): this;
+        addListener(event: string | symbol, listener: (...args: any[]) => void): this;
+
+        removeListener(event: "connection", cb: (websocket: InstanceType<T>, request: InstanceType<U>) => void): this;
+        removeListener(event: "error", cb: (error: Error) => void): this;
+        removeListener(event: "headers", cb: (headers: string[], request: InstanceType<U>) => void): this;
+        removeListener(event: "close" | "listening", cb: () => void): this;
+        removeListener(
+            event: "wsClientError",
+            cb: (error: Error, socket: Duplex, request: InstanceType<U>) => void,
+        ): this;
+        removeListener(event: string | symbol, listener: (...args: any[]) => void): this;
+    }
+
+    const WebSocketServer: typeof Server;
+    interface WebSocketServer extends Server {} // eslint-disable-line @typescript-eslint/no-empty-interface
+    const WebSocket: typeof WebSocketAlias;
+    interface WebSocket extends WebSocketAlias {} // eslint-disable-line @typescript-eslint/no-empty-interface
+
+    // WebSocket stream
+    function createWebSocketStream(websocket: WebSocket, options?: DuplexOptions): Duplex;
+}
+
+export = WebSocket;
diff --git a/mqtt-backend/node_modules/@types/ws/package.json b/mqtt-backend/node_modules/@types/ws/package.json
new file mode 100644
index 0000000..030a47f
--- /dev/null
+++ b/mqtt-backend/node_modules/@types/ws/package.json
@@ -0,0 +1,72 @@
+{
+    "name": "@types/ws",
+    "version": "8.18.1",
+    "description": "TypeScript definitions for ws",
+    "homepage": "https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/ws",
+    "license": "MIT",
+    "contributors": [
+        {
+            "name": "Paul Loyd",
+            "githubUsername": "loyd",
+            "url": "https://github.com/loyd"
+        },
+        {
+            "name": "Margus Lamp",
+            "githubUsername": "mlamp",
+            "url": "https://github.com/mlamp"
+        },
+        {
+            "name": "Philippe D'Alva",
+            "githubUsername": "TitaneBoy",
+            "url": "https://github.com/TitaneBoy"
+        },
+        {
+            "name": "reduckted",
+            "githubUsername": "reduckted",
+            "url": "https://github.com/reduckted"
+        },
+        {
+            "name": "teidesu",
+            "githubUsername": "teidesu",
+            "url": "https://github.com/teidesu"
+        },
+        {
+            "name": "Bartosz Wojtkowiak",
+            "githubUsername": "wojtkowiak",
+            "url": "https://github.com/wojtkowiak"
+        },
+        {
+            "name": "Kyle Hensel",
+            "githubUsername": "k-yle",
+            "url": "https://github.com/k-yle"
+        },
+        {
+            "name": "Samuel Skeen",
+            "githubUsername": "cwadrupldijjit",
+            "url": "https://github.com/cwadrupldijjit"
+        }
+    ],
+    "main": "",
+    "types": "index.d.ts",
+    "exports": {
+        ".": {
+            "types": {
+                "import": "./index.d.mts",
+                "default": "./index.d.ts"
+            }
+        },
+        "./package.json": "./package.json"
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/DefinitelyTyped/DefinitelyTyped.git",
+        "directory": "types/ws"
+    },
+    "scripts": {},
+    "dependencies": {
+        "@types/node": "*"
+    },
+    "peerDependencies": {},
+    "typesPublisherContentHash": "043c83a4bb92503ab01243879ee715fb6db391090d10883c5a2eb72099d22724",
+    "typeScriptVersion": "5.1"
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/abort-controller/LICENSE b/mqtt-backend/node_modules/abort-controller/LICENSE
new file mode 100644
index 0000000..c914149
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 Toru Nagashima
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/abort-controller/README.md b/mqtt-backend/node_modules/abort-controller/README.md
new file mode 100644
index 0000000..9de3e45
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/README.md
@@ -0,0 +1,98 @@
+# abort-controller
+
+[![npm version](https://img.shields.io/npm/v/abort-controller.svg)](https://www.npmjs.com/package/abort-controller)
+[![Downloads/month](https://img.shields.io/npm/dm/abort-controller.svg)](http://www.npmtrends.com/abort-controller)
+[![Build Status](https://travis-ci.org/mysticatea/abort-controller.svg?branch=master)](https://travis-ci.org/mysticatea/abort-controller)
+[![Coverage Status](https://codecov.io/gh/mysticatea/abort-controller/branch/master/graph/badge.svg)](https://codecov.io/gh/mysticatea/abort-controller)
+[![Dependency Status](https://david-dm.org/mysticatea/abort-controller.svg)](https://david-dm.org/mysticatea/abort-controller)
+
+An implementation of [WHATWG AbortController interface](https://dom.spec.whatwg.org/#interface-abortcontroller).
+
+```js
+import AbortController from "abort-controller"
+
+const controller = new AbortController()
+const signal = controller.signal
+
+signal.addEventListener("abort", () => {
+    console.log("aborted!")
+})
+
+controller.abort()
+```
+
+> https://jsfiddle.net/1r2994qp/1/
+
+## 💿 Installation
+
+Use [npm](https://www.npmjs.com/) to install then use a bundler.
+
+```
+npm install abort-controller
+```
+
+Or download from [`dist` directory](./dist).
+
+- [dist/abort-controller.mjs](dist/abort-controller.mjs) ... ES modules version.
+- [dist/abort-controller.js](dist/abort-controller.js) ... Common JS version.
+- [dist/abort-controller.umd.js](dist/abort-controller.umd.js) ... UMD (Universal Module Definition) version. This is transpiled by [Babel](https://babeljs.io/) for IE 11.
+
+## 📖 Usage
+
+### Basic
+
+```js
+import AbortController from "abort-controller"
+// or
+const AbortController = require("abort-controller")
+
+// or UMD version defines a global variable:
+const AbortController = window.AbortControllerShim
+```
+
+If your bundler recognizes `browser` field of `package.json`, the imported `AbortController` is the native one and it doesn't contain shim (even if the native implementation was nothing).
+If you wanted to polyfill `AbortController` for IE, use `abort-controller/polyfill`.
+
+### Polyfilling
+
+Importing `abort-controller/polyfill` assigns the `AbortController` shim to the `AbortController` global variable if the native implementation was nothing.
+
+```js
+import "abort-controller/polyfill"
+// or
+require("abort-controller/polyfill")
+```
+
+### API
+
+#### AbortController
+
+> https://dom.spec.whatwg.org/#interface-abortcontroller
+
+##### controller.signal
+
+The [AbortSignal](https://dom.spec.whatwg.org/#interface-AbortSignal) object which is associated to this controller.
+
+##### controller.abort()
+
+Notify `abort` event to listeners that the `signal` has.
+
+## 📰 Changelog
+
+- See [GitHub releases](https://github.com/mysticatea/abort-controller/releases).
+
+## 🍻 Contributing
+
+Contributing is welcome ❤️
+
+Please use GitHub issues/PRs.
+
+### Development tools
+
+- `npm install` installs dependencies for development.
+- `npm test` runs tests and measures code coverage.
+- `npm run clean` removes temporary files of tests.
+- `npm run coverage` opens code coverage of the previous test with your default browser.
+- `npm run lint` runs ESLint.
+- `npm run build` generates `dist` codes.
+- `npm run watch` runs tests on each file change.
diff --git a/mqtt-backend/node_modules/abort-controller/browser.js b/mqtt-backend/node_modules/abort-controller/browser.js
new file mode 100644
index 0000000..b0c5ec3
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/browser.js
@@ -0,0 +1,13 @@
+/*globals self, window */
+"use strict"
+
+/*eslint-disable @mysticatea/prettier */
+const { AbortController, AbortSignal } =
+    typeof self !== "undefined" ? self :
+    typeof window !== "undefined" ? window :
+    /* otherwise */ undefined
+/*eslint-enable @mysticatea/prettier */
+
+module.exports = AbortController
+module.exports.AbortSignal = AbortSignal
+module.exports.default = AbortController
diff --git a/mqtt-backend/node_modules/abort-controller/browser.mjs b/mqtt-backend/node_modules/abort-controller/browser.mjs
new file mode 100644
index 0000000..a8f321a
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/browser.mjs
@@ -0,0 +1,11 @@
+/*globals self, window */
+
+/*eslint-disable @mysticatea/prettier */
+const { AbortController, AbortSignal } =
+    typeof self !== "undefined" ? self :
+    typeof window !== "undefined" ? window :
+    /* otherwise */ undefined
+/*eslint-enable @mysticatea/prettier */
+
+export default AbortController
+export { AbortController, AbortSignal }
diff --git a/mqtt-backend/node_modules/abort-controller/dist/abort-controller.d.ts b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.d.ts
new file mode 100644
index 0000000..75852fb
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.d.ts
@@ -0,0 +1,43 @@
+import { EventTarget } from "event-target-shim"
+
+type Events = {
+    abort: any
+}
+type EventAttributes = {
+    onabort: any
+}
+/**
+ * The signal class.
+ * @see https://dom.spec.whatwg.org/#abortsignal
+ */
+declare class AbortSignal extends EventTarget<Events, EventAttributes> {
+    /**
+     * AbortSignal cannot be constructed directly.
+     */
+    constructor()
+    /**
+     * Returns `true` if this `AbortSignal`"s `AbortController` has signaled to abort, and `false` otherwise.
+     */
+    readonly aborted: boolean
+}
+/**
+ * The AbortController.
+ * @see https://dom.spec.whatwg.org/#abortcontroller
+ */
+declare class AbortController {
+    /**
+     * Initialize this controller.
+     */
+    constructor()
+    /**
+     * Returns the `AbortSignal` object associated with this object.
+     */
+    readonly signal: AbortSignal
+    /**
+     * Abort and signal to any observers that the associated activity is to be aborted.
+     */
+    abort(): void
+}
+
+export default AbortController
+export { AbortController, AbortSignal }
diff --git a/mqtt-backend/node_modules/abort-controller/dist/abort-controller.js b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.js
new file mode 100644
index 0000000..49af739
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.js
@@ -0,0 +1,127 @@
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * See LICENSE file in root directory for full license.
+ */
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+var eventTargetShim = require('event-target-shim');
+
+/**
+ * The signal class.
+ * @see https://dom.spec.whatwg.org/#abortsignal
+ */
+class AbortSignal extends eventTargetShim.EventTarget {
+    /**
+     * AbortSignal cannot be constructed directly.
+     */
+    constructor() {
+        super();
+        throw new TypeError("AbortSignal cannot be constructed directly");
+    }
+    /**
+     * Returns `true` if this `AbortSignal`'s `AbortController` has signaled to abort, and `false` otherwise.
+     */
+    get aborted() {
+        const aborted = abortedFlags.get(this);
+        if (typeof aborted !== "boolean") {
+            throw new TypeError(`Expected 'this' to be an 'AbortSignal' object, but got ${this === null ? "null" : typeof this}`);
+        }
+        return aborted;
+    }
+}
+eventTargetShim.defineEventAttribute(AbortSignal.prototype, "abort");
+/**
+ * Create an AbortSignal object.
+ */
+function createAbortSignal() {
+    const signal = Object.create(AbortSignal.prototype);
+    eventTargetShim.EventTarget.call(signal);
+    abortedFlags.set(signal, false);
+    return signal;
+}
+/**
+ * Abort a given signal.
+ */
+function abortSignal(signal) {
+    if (abortedFlags.get(signal) !== false) {
+        return;
+    }
+    abortedFlags.set(signal, true);
+    signal.dispatchEvent({ type: "abort" });
+}
+/**
+ * Aborted flag for each instances.
+ */
+const abortedFlags = new WeakMap();
+// Properties should be enumerable.
+Object.defineProperties(AbortSignal.prototype, {
+    aborted: { enumerable: true },
+});
+// `toString()` should return `"[object AbortSignal]"`
+if (typeof Symbol === "function" && typeof Symbol.toStringTag === "symbol") {
+    Object.defineProperty(AbortSignal.prototype, Symbol.toStringTag, {
+        configurable: true,
+        value: "AbortSignal",
+    });
+}
+
+/**
+ * The AbortController.
+ * @see https://dom.spec.whatwg.org/#abortcontroller
+ */
+class AbortController {
+    /**
+     * Initialize this controller.
+     */
+    constructor() {
+        signals.set(this, createAbortSignal());
+    }
+    /**
+     * Returns the `AbortSignal` object associated with this object.
+     */
+    get signal() {
+        return getSignal(this);
+    }
+    /**
+     * Abort and signal to any observers that the associated activity is to be aborted.
+     */
+    abort() {
+        abortSignal(getSignal(this));
+    }
+}
+/**
+ * Associated signals.
+ */
+const signals = new WeakMap();
+/**
+ * Get the associated signal of a given controller.
+ */
+function getSignal(controller) {
+    const signal = signals.get(controller);
+    if (signal == null) {
+        throw new TypeError(`Expected 'this' to be an 'AbortController' object, but got ${controller === null ? "null" : typeof controller}`);
+    }
+    return signal;
+}
+// Properties should be enumerable.
+Object.defineProperties(AbortController.prototype, {
+    signal: { enumerable: true },
+    abort: { enumerable: true },
+});
+if (typeof Symbol === "function" && typeof Symbol.toStringTag === "symbol") {
+    Object.defineProperty(AbortController.prototype, Symbol.toStringTag, {
+        configurable: true,
+        value: "AbortController",
+    });
+}
+
+exports.AbortController = AbortController;
+exports.AbortSignal = AbortSignal;
+exports.default = AbortController;
+
+module.exports = AbortController
+module.exports.AbortController = module.exports["default"] = AbortController
+module.exports.AbortSignal = AbortSignal
+//# sourceMappingURL=abort-controller.js.map
diff --git a/mqtt-backend/node_modules/abort-controller/dist/abort-controller.js.map b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.js.map
new file mode 100644
index 0000000..cfdcafd
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"abort-controller.js","sources":["../src/abort-signal.ts","../src/abort-controller.ts"],"sourcesContent":["import {\n    // Event,\n    EventTarget,\n    // Type,\n    defineEventAttribute,\n} from \"event-target-shim\"\n\n// Known Limitation\n//   Use `any` because the type of `AbortSignal` in `lib.dom.d.ts` is wrong and\n//   to make assignable our `AbortSignal` into that.\n//   https://github.com/Microsoft/TSJS-lib-generator/pull/623\ntype Events = {\n    abort: any // Event & Type<\"abort\">\n}\ntype EventAttributes = {\n    onabort: any // Event & Type<\"abort\">\n}\n\n/**\n * The signal class.\n * @see https://dom.spec.whatwg.org/#abortsignal\n */\nexport default class AbortSignal extends EventTarget<Events, EventAttributes> {\n    /**\n     * AbortSignal cannot be constructed directly.\n     */\n    public constructor() {\n        super()\n        throw new TypeError(\"AbortSignal cannot be constructed directly\")\n    }\n\n    /**\n     * Returns `true` if this `AbortSignal`'s `AbortController` has signaled to abort, and `false` otherwise.\n     */\n    public get aborted(): boolean {\n        const aborted = abortedFlags.get(this)\n        if (typeof aborted !== \"boolean\") {\n            throw new TypeError(\n                `Expected 'this' to be an 'AbortSignal' object, but got ${\n                    this === null ? \"null\" : typeof this\n                }`,\n            )\n        }\n        return aborted\n    }\n}\ndefineEventAttribute(AbortSignal.prototype, \"abort\")\n\n/**\n * Create an AbortSignal object.\n */\nexport function createAbortSignal(): AbortSignal {\n    const signal = Object.create(AbortSignal.prototype)\n    EventTarget.call(signal)\n    abortedFlags.set(signal, false)\n    return signal\n}\n\n/**\n * Abort a given signal.\n */\nexport function abortSignal(signal: AbortSignal): void {\n    if (abortedFlags.get(signal) !== false) {\n        return\n    }\n\n    abortedFlags.set(signal, true)\n    signal.dispatchEvent<\"abort\">({ type: \"abort\" })\n}\n\n/**\n * Aborted flag for each instances.\n */\nconst abortedFlags = new WeakMap<AbortSignal, boolean>()\n\n// Properties should be enumerable.\nObject.defineProperties(AbortSignal.prototype, {\n    aborted: { enumerable: true },\n})\n\n// `toString()` should return `\"[object AbortSignal]\"`\nif (typeof Symbol === \"function\" && typeof Symbol.toStringTag === \"symbol\") {\n    Object.defineProperty(AbortSignal.prototype, Symbol.toStringTag, {\n        configurable: true,\n        value: \"AbortSignal\",\n    })\n}\n","import AbortSignal, { abortSignal, createAbortSignal } from \"./abort-signal\"\n\n/**\n * The AbortController.\n * @see https://dom.spec.whatwg.org/#abortcontroller\n */\nexport default class AbortController {\n    /**\n     * Initialize this controller.\n     */\n    public constructor() {\n        signals.set(this, createAbortSignal())\n    }\n\n    /**\n     * Returns the `AbortSignal` object associated with this object.\n     */\n    public get signal(): AbortSignal {\n        return getSignal(this)\n    }\n\n    /**\n     * Abort and signal to any observers that the associated activity is to be aborted.\n     */\n    public abort(): void {\n        abortSignal(getSignal(this))\n    }\n}\n\n/**\n * Associated signals.\n */\nconst signals = new WeakMap<AbortController, AbortSignal>()\n\n/**\n * Get the associated signal of a given controller.\n */\nfunction getSignal(controller: AbortController): AbortSignal {\n    const signal = signals.get(controller)\n    if (signal == null) {\n        throw new TypeError(\n            `Expected 'this' to be an 'AbortController' object, but got ${\n                controller === null ? \"null\" : typeof controller\n            }`,\n        )\n    }\n    return signal\n}\n\n// Properties should be enumerable.\nObject.defineProperties(AbortController.prototype, {\n    signal: { enumerable: true },\n    abort: { enumerable: true },\n})\n\nif (typeof Symbol === \"function\" && typeof Symbol.toStringTag === \"symbol\") {\n    Object.defineProperty(AbortController.prototype, Symbol.toStringTag, {\n        configurable: true,\n        value: \"AbortController\",\n    })\n}\n\nexport { AbortController, AbortSignal }\n"],"names":["EventTarget","defineEventAttribute"],"mappings":";;;;;;;;;;AAkBA;;;;AAIA,MAAqB,WAAY,SAAQA,2BAAoC;;;;IAIzE;QACI,KAAK,EAAE,CAAA;QACP,MAAM,IAAI,SAAS,CAAC,4CAA4C,CAAC,CAAA;KACpE;;;;IAKD,IAAW,OAAO;QACd,MAAM,OAAO,GAAG,YAAY,CAAC,GAAG,CAAC,IAAI,CAAC,CAAA;QACtC,IAAI,OAAO,OAAO,KAAK,SAAS,EAAE;YAC9B,MAAM,IAAI,SAAS,CACf,0DACI,IAAI,KAAK,IAAI,GAAG,MAAM,GAAG,OAAO,IACpC,EAAE,CACL,CAAA;SACJ;QACD,OAAO,OAAO,CAAA;KACjB;CACJ;AACDC,oCAAoB,CAAC,WAAW,CAAC,SAAS,EAAE,OAAO,CAAC,CAAA;;;;AAKpD,SAAgB,iBAAiB;IAC7B,MAAM,MAAM,GAAG,MAAM,CAAC,MAAM,CAAC,WAAW,CAAC,SAAS,CAAC,CAAA;IACnDD,2BAAW,CAAC,IAAI,CAAC,MAAM,CAAC,CAAA;IACxB,YAAY,CAAC,GAAG,CAAC,MAAM,EAAE,KAAK,CAAC,CAAA;IAC/B,OAAO,MAAM,CAAA;CAChB;;;;AAKD,SAAgB,WAAW,CAAC,MAAmB;IAC3C,IAAI,YAAY,CAAC,GAAG,CAAC,MAAM,CAAC,KAAK,KAAK,EAAE;QACpC,OAAM;KACT;IAED,YAAY,CAAC,GAAG,CAAC,MAAM,EAAE,IAAI,CAAC,CAAA;IAC9B,MAAM,CAAC,aAAa,CAAU,EAAE,IAAI,EAAE,OAAO,EAAE,CAAC,CAAA;CACnD;;;;AAKD,MAAM,YAAY,GAAG,IAAI,OAAO,EAAwB,CAAA;;AAGxD,MAAM,CAAC,gBAAgB,CAAC,WAAW,CAAC,SAAS,EAAE;IAC3C,OAAO,EAAE,EAAE,UAAU,EAAE,IAAI,EAAE;CAChC,CAAC,CAAA;;AAGF,IAAI,OAAO,MAAM,KAAK,UAAU,IAAI,OAAO,MAAM,CAAC,WAAW,KAAK,QAAQ,EAAE;IACxE,MAAM,CAAC,cAAc,CAAC,WAAW,CAAC,SAAS,EAAE,MAAM,CAAC,WAAW,EAAE;QAC7D,YAAY,EAAE,IAAI;QAClB,KAAK,EAAE,aAAa;KACvB,CAAC,CAAA;CACL;;ACpFD;;;;AAIA,MAAqB,eAAe;;;;IAIhC;QACI,OAAO,CAAC,GAAG,CAAC,IAAI,EAAE,iBAAiB,EAAE,CAAC,CAAA;KACzC;;;;IAKD,IAAW,MAAM;QACb,OAAO,SAAS,CAAC,IAAI,CAAC,CAAA;KACzB;;;;IAKM,KAAK;QACR,WAAW,CAAC,SAAS,CAAC,IAAI,CAAC,CAAC,CAAA;KAC/B;CACJ;;;;AAKD,MAAM,OAAO,GAAG,IAAI,OAAO,EAAgC,CAAA;;;;AAK3D,SAAS,SAAS,CAAC,UAA2B;IAC1C,MAAM,MAAM,GAAG,OAAO,CAAC,GAAG,CAAC,UAAU,CAAC,CAAA;IACtC,IAAI,MAAM,IAAI,IAAI,EAAE;QAChB,MAAM,IAAI,SAAS,CACf,8DACI,UAAU,KAAK,IAAI,GAAG,MAAM,GAAG,OAAO,UAC1C,EAAE,CACL,CAAA;KACJ;IACD,OAAO,MAAM,CAAA;CAChB;;AAGD,MAAM,CAAC,gBAAgB,CAAC,eAAe,CAAC,SAAS,EAAE;IAC/C,MAAM,EAAE,EAAE,UAAU,EAAE,IAAI,EAAE;IAC5B,KAAK,EAAE,EAAE,UAAU,EAAE,IAAI,EAAE;CAC9B,CAAC,CAAA;AAEF,IAAI,OAAO,MAAM,KAAK,UAAU,IAAI,OAAO,MAAM,CAAC,WAAW,KAAK,QAAQ,EAAE;IACxE,MAAM,CAAC,cAAc,CAAC,eAAe,CAAC,SAAS,EAAE,MAAM,CAAC,WAAW,EAAE;QACjE,YAAY,EAAE,IAAI;QAClB,KAAK,EAAE,iBAAiB;KAC3B,CAAC,CAAA;CACL;;;;;;;;;;;;;"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/abort-controller/dist/abort-controller.mjs b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.mjs
new file mode 100644
index 0000000..88ba22d
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.mjs
@@ -0,0 +1,118 @@
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * See LICENSE file in root directory for full license.
+ */
+import { EventTarget, defineEventAttribute } from 'event-target-shim';
+
+/**
+ * The signal class.
+ * @see https://dom.spec.whatwg.org/#abortsignal
+ */
+class AbortSignal extends EventTarget {
+    /**
+     * AbortSignal cannot be constructed directly.
+     */
+    constructor() {
+        super();
+        throw new TypeError("AbortSignal cannot be constructed directly");
+    }
+    /**
+     * Returns `true` if this `AbortSignal`'s `AbortController` has signaled to abort, and `false` otherwise.
+     */
+    get aborted() {
+        const aborted = abortedFlags.get(this);
+        if (typeof aborted !== "boolean") {
+            throw new TypeError(`Expected 'this' to be an 'AbortSignal' object, but got ${this === null ? "null" : typeof this}`);
+        }
+        return aborted;
+    }
+}
+defineEventAttribute(AbortSignal.prototype, "abort");
+/**
+ * Create an AbortSignal object.
+ */
+function createAbortSignal() {
+    const signal = Object.create(AbortSignal.prototype);
+    EventTarget.call(signal);
+    abortedFlags.set(signal, false);
+    return signal;
+}
+/**
+ * Abort a given signal.
+ */
+function abortSignal(signal) {
+    if (abortedFlags.get(signal) !== false) {
+        return;
+    }
+    abortedFlags.set(signal, true);
+    signal.dispatchEvent({ type: "abort" });
+}
+/**
+ * Aborted flag for each instances.
+ */
+const abortedFlags = new WeakMap();
+// Properties should be enumerable.
+Object.defineProperties(AbortSignal.prototype, {
+    aborted: { enumerable: true },
+});
+// `toString()` should return `"[object AbortSignal]"`
+if (typeof Symbol === "function" && typeof Symbol.toStringTag === "symbol") {
+    Object.defineProperty(AbortSignal.prototype, Symbol.toStringTag, {
+        configurable: true,
+        value: "AbortSignal",
+    });
+}
+
+/**
+ * The AbortController.
+ * @see https://dom.spec.whatwg.org/#abortcontroller
+ */
+class AbortController {
+    /**
+     * Initialize this controller.
+     */
+    constructor() {
+        signals.set(this, createAbortSignal());
+    }
+    /**
+     * Returns the `AbortSignal` object associated with this object.
+     */
+    get signal() {
+        return getSignal(this);
+    }
+    /**
+     * Abort and signal to any observers that the associated activity is to be aborted.
+     */
+    abort() {
+        abortSignal(getSignal(this));
+    }
+}
+/**
+ * Associated signals.
+ */
+const signals = new WeakMap();
+/**
+ * Get the associated signal of a given controller.
+ */
+function getSignal(controller) {
+    const signal = signals.get(controller);
+    if (signal == null) {
+        throw new TypeError(`Expected 'this' to be an 'AbortController' object, but got ${controller === null ? "null" : typeof controller}`);
+    }
+    return signal;
+}
+// Properties should be enumerable.
+Object.defineProperties(AbortController.prototype, {
+    signal: { enumerable: true },
+    abort: { enumerable: true },
+});
+if (typeof Symbol === "function" && typeof Symbol.toStringTag === "symbol") {
+    Object.defineProperty(AbortController.prototype, Symbol.toStringTag, {
+        configurable: true,
+        value: "AbortController",
+    });
+}
+
+export default AbortController;
+export { AbortController, AbortSignal };
+//# sourceMappingURL=abort-controller.mjs.map
diff --git a/mqtt-backend/node_modules/abort-controller/dist/abort-controller.mjs.map b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.mjs.map
new file mode 100644
index 0000000..1e8fa6b
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.mjs.map
@@ -0,0 +1 @@
+{"version":3,"file":"abort-controller.mjs","sources":["../src/abort-signal.ts","../src/abort-controller.ts"],"sourcesContent":["import {\n    // Event,\n    EventTarget,\n    // Type,\n    defineEventAttribute,\n} from \"event-target-shim\"\n\n// Known Limitation\n//   Use `any` because the type of `AbortSignal` in `lib.dom.d.ts` is wrong and\n//   to make assignable our `AbortSignal` into that.\n//   https://github.com/Microsoft/TSJS-lib-generator/pull/623\ntype Events = {\n    abort: any // Event & Type<\"abort\">\n}\ntype EventAttributes = {\n    onabort: any // Event & Type<\"abort\">\n}\n\n/**\n * The signal class.\n * @see https://dom.spec.whatwg.org/#abortsignal\n */\nexport default class AbortSignal extends EventTarget<Events, EventAttributes> {\n    /**\n     * AbortSignal cannot be constructed directly.\n     */\n    public constructor() {\n        super()\n        throw new TypeError(\"AbortSignal cannot be constructed directly\")\n    }\n\n    /**\n     * Returns `true` if this `AbortSignal`'s `AbortController` has signaled to abort, and `false` otherwise.\n     */\n    public get aborted(): boolean {\n        const aborted = abortedFlags.get(this)\n        if (typeof aborted !== \"boolean\") {\n            throw new TypeError(\n                `Expected 'this' to be an 'AbortSignal' object, but got ${\n                    this === null ? \"null\" : typeof this\n                }`,\n            )\n        }\n        return aborted\n    }\n}\ndefineEventAttribute(AbortSignal.prototype, \"abort\")\n\n/**\n * Create an AbortSignal object.\n */\nexport function createAbortSignal(): AbortSignal {\n    const signal = Object.create(AbortSignal.prototype)\n    EventTarget.call(signal)\n    abortedFlags.set(signal, false)\n    return signal\n}\n\n/**\n * Abort a given signal.\n */\nexport function abortSignal(signal: AbortSignal): void {\n    if (abortedFlags.get(signal) !== false) {\n        return\n    }\n\n    abortedFlags.set(signal, true)\n    signal.dispatchEvent<\"abort\">({ type: \"abort\" })\n}\n\n/**\n * Aborted flag for each instances.\n */\nconst abortedFlags = new WeakMap<AbortSignal, boolean>()\n\n// Properties should be enumerable.\nObject.defineProperties(AbortSignal.prototype, {\n    aborted: { enumerable: true },\n})\n\n// `toString()` should return `\"[object AbortSignal]\"`\nif (typeof Symbol === \"function\" && typeof Symbol.toStringTag === \"symbol\") {\n    Object.defineProperty(AbortSignal.prototype, Symbol.toStringTag, {\n        configurable: true,\n        value: \"AbortSignal\",\n    })\n}\n","import AbortSignal, { abortSignal, createAbortSignal } from \"./abort-signal\"\n\n/**\n * The AbortController.\n * @see https://dom.spec.whatwg.org/#abortcontroller\n */\nexport default class AbortController {\n    /**\n     * Initialize this controller.\n     */\n    public constructor() {\n        signals.set(this, createAbortSignal())\n    }\n\n    /**\n     * Returns the `AbortSignal` object associated with this object.\n     */\n    public get signal(): AbortSignal {\n        return getSignal(this)\n    }\n\n    /**\n     * Abort and signal to any observers that the associated activity is to be aborted.\n     */\n    public abort(): void {\n        abortSignal(getSignal(this))\n    }\n}\n\n/**\n * Associated signals.\n */\nconst signals = new WeakMap<AbortController, AbortSignal>()\n\n/**\n * Get the associated signal of a given controller.\n */\nfunction getSignal(controller: AbortController): AbortSignal {\n    const signal = signals.get(controller)\n    if (signal == null) {\n        throw new TypeError(\n            `Expected 'this' to be an 'AbortController' object, but got ${\n                controller === null ? \"null\" : typeof controller\n            }`,\n        )\n    }\n    return signal\n}\n\n// Properties should be enumerable.\nObject.defineProperties(AbortController.prototype, {\n    signal: { enumerable: true },\n    abort: { enumerable: true },\n})\n\nif (typeof Symbol === \"function\" && typeof Symbol.toStringTag === \"symbol\") {\n    Object.defineProperty(AbortController.prototype, Symbol.toStringTag, {\n        configurable: true,\n        value: \"AbortController\",\n    })\n}\n\nexport { AbortController, AbortSignal }\n"],"names":[],"mappings":";;;;;;AAkBA;;;;AAIA,MAAqB,WAAY,SAAQ,WAAoC;;;;IAIzE;QACI,KAAK,EAAE,CAAA;QACP,MAAM,IAAI,SAAS,CAAC,4CAA4C,CAAC,CAAA;KACpE;;;;IAKD,IAAW,OAAO;QACd,MAAM,OAAO,GAAG,YAAY,CAAC,GAAG,CAAC,IAAI,CAAC,CAAA;QACtC,IAAI,OAAO,OAAO,KAAK,SAAS,EAAE;YAC9B,MAAM,IAAI,SAAS,CACf,0DACI,IAAI,KAAK,IAAI,GAAG,MAAM,GAAG,OAAO,IACpC,EAAE,CACL,CAAA;SACJ;QACD,OAAO,OAAO,CAAA;KACjB;CACJ;AACD,oBAAoB,CAAC,WAAW,CAAC,SAAS,EAAE,OAAO,CAAC,CAAA;;;;AAKpD,SAAgB,iBAAiB;IAC7B,MAAM,MAAM,GAAG,MAAM,CAAC,MAAM,CAAC,WAAW,CAAC,SAAS,CAAC,CAAA;IACnD,WAAW,CAAC,IAAI,CAAC,MAAM,CAAC,CAAA;IACxB,YAAY,CAAC,GAAG,CAAC,MAAM,EAAE,KAAK,CAAC,CAAA;IAC/B,OAAO,MAAM,CAAA;CAChB;;;;AAKD,SAAgB,WAAW,CAAC,MAAmB;IAC3C,IAAI,YAAY,CAAC,GAAG,CAAC,MAAM,CAAC,KAAK,KAAK,EAAE;QACpC,OAAM;KACT;IAED,YAAY,CAAC,GAAG,CAAC,MAAM,EAAE,IAAI,CAAC,CAAA;IAC9B,MAAM,CAAC,aAAa,CAAU,EAAE,IAAI,EAAE,OAAO,EAAE,CAAC,CAAA;CACnD;;;;AAKD,MAAM,YAAY,GAAG,IAAI,OAAO,EAAwB,CAAA;;AAGxD,MAAM,CAAC,gBAAgB,CAAC,WAAW,CAAC,SAAS,EAAE;IAC3C,OAAO,EAAE,EAAE,UAAU,EAAE,IAAI,EAAE;CAChC,CAAC,CAAA;;AAGF,IAAI,OAAO,MAAM,KAAK,UAAU,IAAI,OAAO,MAAM,CAAC,WAAW,KAAK,QAAQ,EAAE;IACxE,MAAM,CAAC,cAAc,CAAC,WAAW,CAAC,SAAS,EAAE,MAAM,CAAC,WAAW,EAAE;QAC7D,YAAY,EAAE,IAAI;QAClB,KAAK,EAAE,aAAa;KACvB,CAAC,CAAA;CACL;;ACpFD;;;;AAIA,MAAqB,eAAe;;;;IAIhC;QACI,OAAO,CAAC,GAAG,CAAC,IAAI,EAAE,iBAAiB,EAAE,CAAC,CAAA;KACzC;;;;IAKD,IAAW,MAAM;QACb,OAAO,SAAS,CAAC,IAAI,CAAC,CAAA;KACzB;;;;IAKM,KAAK;QACR,WAAW,CAAC,SAAS,CAAC,IAAI,CAAC,CAAC,CAAA;KAC/B;CACJ;;;;AAKD,MAAM,OAAO,GAAG,IAAI,OAAO,EAAgC,CAAA;;;;AAK3D,SAAS,SAAS,CAAC,UAA2B;IAC1C,MAAM,MAAM,GAAG,OAAO,CAAC,GAAG,CAAC,UAAU,CAAC,CAAA;IACtC,IAAI,MAAM,IAAI,IAAI,EAAE;QAChB,MAAM,IAAI,SAAS,CACf,8DACI,UAAU,KAAK,IAAI,GAAG,MAAM,GAAG,OAAO,UAC1C,EAAE,CACL,CAAA;KACJ;IACD,OAAO,MAAM,CAAA;CAChB;;AAGD,MAAM,CAAC,gBAAgB,CAAC,eAAe,CAAC,SAAS,EAAE;IAC/C,MAAM,EAAE,EAAE,UAAU,EAAE,IAAI,EAAE;IAC5B,KAAK,EAAE,EAAE,UAAU,EAAE,IAAI,EAAE;CAC9B,CAAC,CAAA;AAEF,IAAI,OAAO,MAAM,KAAK,UAAU,IAAI,OAAO,MAAM,CAAC,WAAW,KAAK,QAAQ,EAAE;IACxE,MAAM,CAAC,cAAc,CAAC,eAAe,CAAC,SAAS,EAAE,MAAM,CAAC,WAAW,EAAE;QACjE,YAAY,EAAE,IAAI;QAClB,KAAK,EAAE,iBAAiB;KAC3B,CAAC,CAAA;CACL;;;;;"}
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diff --git a/mqtt-backend/node_modules/abort-controller/dist/abort-controller.umd.js b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.umd.js
new file mode 100644
index 0000000..f643cfd
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.umd.js
@@ -0,0 +1,5 @@
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * See LICENSE file in root directory for full license.
+ */(function(a,b){"object"==typeof exports&&"undefined"!=typeof module?b(exports):"function"==typeof define&&define.amd?define(["exports"],b):(a=a||self,b(a.AbortControllerShim={}))})(this,function(a){'use strict';function b(a){return b="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(a){return typeof a}:function(a){return a&&"function"==typeof Symbol&&a.constructor===Symbol&&a!==Symbol.prototype?"symbol":typeof a},b(a)}function c(a,b){if(!(a instanceof b))throw new TypeError("Cannot call a class as a function")}function d(a,b){for(var c,d=0;d<b.length;d++)c=b[d],c.enumerable=c.enumerable||!1,c.configurable=!0,"value"in c&&(c.writable=!0),Object.defineProperty(a,c.key,c)}function e(a,b,c){return b&&d(a.prototype,b),c&&d(a,c),a}function f(a,b){if("function"!=typeof b&&null!==b)throw new TypeError("Super expression must either be null or a function");a.prototype=Object.create(b&&b.prototype,{constructor:{value:a,writable:!0,configurable:!0}}),b&&h(a,b)}function g(a){return g=Object.setPrototypeOf?Object.getPrototypeOf:function(a){return a.__proto__||Object.getPrototypeOf(a)},g(a)}function h(a,b){return h=Object.setPrototypeOf||function(a,b){return a.__proto__=b,a},h(a,b)}function i(a){if(void 0===a)throw new ReferenceError("this hasn't been initialised - super() hasn't been called");return a}function j(a,b){return b&&("object"==typeof b||"function"==typeof b)?b:i(a)}function k(a){var b=F.get(a);return console.assert(null!=b,"'this' is expected an Event object, but got",a),b}function l(a){return null==a.passiveListener?void(!a.event.cancelable||(a.canceled=!0,"function"==typeof a.event.preventDefault&&a.event.preventDefault())):void("undefined"!=typeof console&&"function"==typeof console.error&&console.error("Unable to preventDefault inside passive event listener invocation.",a.passiveListener))}function m(a,b){F.set(this,{eventTarget:a,event:b,eventPhase:2,currentTarget:a,canceled:!1,stopped:!1,immediateStopped:!1,passiveListener:null,timeStamp:b.timeStamp||Date.now()}),Object.defineProperty(this,"isTrusted",{value:!1,enumerable:!0});for(var c,d=Object.keys(b),e=0;e<d.length;++e)c=d[e],c in this||Object.defineProperty(this,c,n(c))}function n(a){return{get:function(){return k(this).event[a]},set:function(b){k(this).event[a]=b},configurable:!0,enumerable:!0}}function o(a){return{value:function(){var b=k(this).event;return b[a].apply(b,arguments)},configurable:!0,enumerable:!0}}function p(a,b){function c(b,c){a.call(this,b,c)}var d=Object.keys(b);if(0===d.length)return a;c.prototype=Object.create(a.prototype,{constructor:{value:c,configurable:!0,writable:!0}});for(var e,f=0;f<d.length;++f)if(e=d[f],!(e in a.prototype)){var g=Object.getOwnPropertyDescriptor(b,e),h="function"==typeof g.value;Object.defineProperty(c.prototype,e,h?o(e):n(e))}return c}function q(a){if(null==a||a===Object.prototype)return m;var b=G.get(a);return null==b&&(b=p(q(Object.getPrototypeOf(a)),a),G.set(a,b)),b}function r(a,b){var c=q(Object.getPrototypeOf(b));return new c(a,b)}function s(a){return k(a).immediateStopped}function t(a,b){k(a).eventPhase=b}function u(a,b){k(a).currentTarget=b}function v(a,b){k(a).passiveListener=b}function w(a){return null!==a&&"object"===b(a)}function x(a){var b=H.get(a);if(null==b)throw new TypeError("'this' is expected an EventTarget object, but got another value.");return b}function y(a){return{get:function(){for(var b=x(this),c=b.get(a);null!=c;){if(3===c.listenerType)return c.listener;c=c.next}return null},set:function(b){"function"==typeof b||w(b)||(b=null);for(var c=x(this),d=null,e=c.get(a);null!=e;)3===e.listenerType?null===d?null===e.next?c.delete(a):c.set(a,e.next):d.next=e.next:d=e,e=e.next;if(null!==b){var f={listener:b,listenerType:3,passive:!1,once:!1,next:null};null===d?c.set(a,f):d.next=f}},configurable:!0,enumerable:!0}}function z(a,b){Object.defineProperty(a,"on".concat(b),y(b))}function A(a){function b(){B.call(this)}b.prototype=Object.create(B.prototype,{constructor:{value:b,configurable:!0,writable:!0}});for(var c=0;c<a.length;++c)z(b.prototype,a[c]);return b}function B(){if(this instanceof B)return void H.set(this,new Map);if(1===arguments.length&&Array.isArray(arguments[0]))return A(arguments[0]);if(0<arguments.length){for(var a=Array(arguments.length),b=0;b<arguments.length;++b)a[b]=arguments[b];return A(a)}throw new TypeError("Cannot call a class as a function")}function C(){var a=Object.create(K.prototype);return B.call(a),L.set(a,!1),a}function D(a){!1!==L.get(a)||(L.set(a,!0),a.dispatchEvent({type:"abort"}))}function E(a){var c=N.get(a);if(null==c)throw new TypeError("Expected 'this' to be an 'AbortController' object, but got ".concat(null===a?"null":b(a)));return c}var F=new WeakMap,G=new WeakMap;m.prototype={get type(){return k(this).event.type},get target(){return k(this).eventTarget},get currentTarget(){return k(this).currentTarget},composedPath:function(){var a=k(this).currentTarget;return null==a?[]:[a]},get NONE(){return 0},get CAPTURING_PHASE(){return 1},get AT_TARGET(){return 2},get BUBBLING_PHASE(){return 3},get eventPhase(){return k(this).eventPhase},stopPropagation:function(){var a=k(this);a.stopped=!0,"function"==typeof a.event.stopPropagation&&a.event.stopPropagation()},stopImmediatePropagation:function(){var a=k(this);a.stopped=!0,a.immediateStopped=!0,"function"==typeof a.event.stopImmediatePropagation&&a.event.stopImmediatePropagation()},get bubbles(){return!!k(this).event.bubbles},get cancelable(){return!!k(this).event.cancelable},preventDefault:function(){l(k(this))},get defaultPrevented(){return k(this).canceled},get composed(){return!!k(this).event.composed},get timeStamp(){return k(this).timeStamp},get srcElement(){return k(this).eventTarget},get cancelBubble(){return k(this).stopped},set cancelBubble(a){if(a){var b=k(this);b.stopped=!0,"boolean"==typeof b.event.cancelBubble&&(b.event.cancelBubble=!0)}},get returnValue(){return!k(this).canceled},set returnValue(a){a||l(k(this))},initEvent:function(){}},Object.defineProperty(m.prototype,"constructor",{value:m,configurable:!0,writable:!0}),"undefined"!=typeof window&&"undefined"!=typeof window.Event&&(Object.setPrototypeOf(m.prototype,window.Event.prototype),G.set(window.Event.prototype,m));var H=new WeakMap,I=1,J=2;B.prototype={addEventListener:function(a,b,c){if(null!=b){if("function"!=typeof b&&!w(b))throw new TypeError("'listener' should be a function or an object.");var d=x(this),e=w(c),f=e?!!c.capture:!!c,g=f?I:J,h={listener:b,listenerType:g,passive:e&&!!c.passive,once:e&&!!c.once,next:null},i=d.get(a);if(void 0===i)return void d.set(a,h);for(var j=null;null!=i;){if(i.listener===b&&i.listenerType===g)return;j=i,i=i.next}j.next=h}},removeEventListener:function(a,b,c){if(null!=b)for(var d=x(this),e=w(c)?!!c.capture:!!c,f=e?I:J,g=null,h=d.get(a);null!=h;){if(h.listener===b&&h.listenerType===f)return void(null===g?null===h.next?d.delete(a):d.set(a,h.next):g.next=h.next);g=h,h=h.next}},dispatchEvent:function(a){if(null==a||"string"!=typeof a.type)throw new TypeError("\"event.type\" should be a string.");var b=x(this),c=a.type,d=b.get(c);if(null==d)return!0;for(var e=r(this,a),f=null;null!=d;){if(d.once?null===f?null===d.next?b.delete(c):b.set(c,d.next):f.next=d.next:f=d,v(e,d.passive?d.listener:null),"function"==typeof d.listener)try{d.listener.call(this,e)}catch(a){"undefined"!=typeof console&&"function"==typeof console.error&&console.error(a)}else d.listenerType!==3&&"function"==typeof d.listener.handleEvent&&d.listener.handleEvent(e);if(s(e))break;d=d.next}return v(e,null),t(e,0),u(e,null),!e.defaultPrevented}},Object.defineProperty(B.prototype,"constructor",{value:B,configurable:!0,writable:!0}),"undefined"!=typeof window&&"undefined"!=typeof window.EventTarget&&Object.setPrototypeOf(B.prototype,window.EventTarget.prototype);var K=function(a){function d(){var a;throw c(this,d),a=j(this,g(d).call(this)),new TypeError("AbortSignal cannot be constructed directly")}return f(d,a),e(d,[{key:"aborted",get:function(){var a=L.get(this);if("boolean"!=typeof a)throw new TypeError("Expected 'this' to be an 'AbortSignal' object, but got ".concat(null===this?"null":b(this)));return a}}]),d}(B);z(K.prototype,"abort");var L=new WeakMap;Object.defineProperties(K.prototype,{aborted:{enumerable:!0}}),"function"==typeof Symbol&&"symbol"===b(Symbol.toStringTag)&&Object.defineProperty(K.prototype,Symbol.toStringTag,{configurable:!0,value:"AbortSignal"});var M=function(){function a(){c(this,a),N.set(this,C())}return e(a,[{key:"abort",value:function(){D(E(this))}},{key:"signal",get:function(){return E(this)}}]),a}(),N=new WeakMap;if(Object.defineProperties(M.prototype,{signal:{enumerable:!0},abort:{enumerable:!0}}),"function"==typeof Symbol&&"symbol"===b(Symbol.toStringTag)&&Object.defineProperty(M.prototype,Symbol.toStringTag,{configurable:!0,value:"AbortController"}),a.AbortController=M,a.AbortSignal=K,a.default=M,Object.defineProperty(a,"__esModule",{value:!0}),"undefined"==typeof module&&"undefined"==typeof define){var O=Function("return this")();"undefined"==typeof O.AbortController&&(O.AbortController=M,O.AbortSignal=K)}});
+//# sourceMappingURL=abort-controller.umd.js.map
diff --git a/mqtt-backend/node_modules/abort-controller/dist/abort-controller.umd.js.map b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.umd.js.map
new file mode 100644
index 0000000..875ab02
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/dist/abort-controller.umd.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"abort-controller.umd.js","sources":["../node_modules/event-target-shim/dist/event-target-shim.mjs","../src/abort-signal.ts","../src/abort-controller.ts"],"sourcesContent":["/**\n * @author Toru Nagashima <https://github.com/mysticatea>\n * @copyright 2015 Toru Nagashima. All rights reserved.\n * See LICENSE file in root directory for full license.\n */\n/**\n * @typedef {object} PrivateData\n * @property {EventTarget} eventTarget The event target.\n * @property {{type:string}} event The original event object.\n * @property {number} eventPhase The current event phase.\n * @property {EventTarget|null} currentTarget The current event target.\n * @property {boolean} canceled The flag to prevent default.\n * @property {boolean} stopped The flag to stop propagation.\n * @property {boolean} immediateStopped The flag to stop propagation immediately.\n * @property {Function|null} passiveListener The listener if the current listener is passive. Otherwise this is null.\n * @property {number} timeStamp The unix time.\n * @private\n */\n\n/**\n * Private data for event wrappers.\n * @type {WeakMap<Event, PrivateData>}\n * @private\n */\nconst privateData = new WeakMap();\n\n/**\n * Cache for wrapper classes.\n * @type {WeakMap<Object, Function>}\n * @private\n */\nconst wrappers = new WeakMap();\n\n/**\n * Get private data.\n * @param {Event} event The event object to get private data.\n * @returns {PrivateData} The private data of the event.\n * @private\n */\nfunction pd(event) {\n    const retv = privateData.get(event);\n    console.assert(\n        retv != null,\n        \"'this' is expected an Event object, but got\",\n        event\n    );\n    return retv\n}\n\n/**\n * https://dom.spec.whatwg.org/#set-the-canceled-flag\n * @param data {PrivateData} private data.\n */\nfunction setCancelFlag(data) {\n    if (data.passiveListener != null) {\n        if (\n            typeof console !== \"undefined\" &&\n            typeof console.error === \"function\"\n        ) {\n            console.error(\n                \"Unable to preventDefault inside passive event listener invocation.\",\n                data.passiveListener\n            );\n        }\n        return\n    }\n    if (!data.event.cancelable) {\n        return\n    }\n\n    data.canceled = true;\n    if (typeof data.event.preventDefault === \"function\") {\n        data.event.preventDefault();\n    }\n}\n\n/**\n * @see https://dom.spec.whatwg.org/#interface-event\n * @private\n */\n/**\n * The event wrapper.\n * @constructor\n * @param {EventTarget} eventTarget The event target of this dispatching.\n * @param {Event|{type:string}} event The original event to wrap.\n */\nfunction Event(eventTarget, event) {\n    privateData.set(this, {\n        eventTarget,\n        event,\n        eventPhase: 2,\n        currentTarget: eventTarget,\n        canceled: false,\n        stopped: false,\n        immediateStopped: false,\n        passiveListener: null,\n        timeStamp: event.timeStamp || Date.now(),\n    });\n\n    // https://heycam.github.io/webidl/#Unforgeable\n    Object.defineProperty(this, \"isTrusted\", { value: false, enumerable: true });\n\n    // Define accessors\n    const keys = Object.keys(event);\n    for (let i = 0; i < keys.length; ++i) {\n        const key = keys[i];\n        if (!(key in this)) {\n            Object.defineProperty(this, key, defineRedirectDescriptor(key));\n        }\n    }\n}\n\n// Should be enumerable, but class methods are not enumerable.\nEvent.prototype = {\n    /**\n     * The type of this event.\n     * @type {string}\n     */\n    get type() {\n        return pd(this).event.type\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     */\n    get target() {\n        return pd(this).eventTarget\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     */\n    get currentTarget() {\n        return pd(this).currentTarget\n    },\n\n    /**\n     * @returns {EventTarget[]} The composed path of this event.\n     */\n    composedPath() {\n        const currentTarget = pd(this).currentTarget;\n        if (currentTarget == null) {\n            return []\n        }\n        return [currentTarget]\n    },\n\n    /**\n     * Constant of NONE.\n     * @type {number}\n     */\n    get NONE() {\n        return 0\n    },\n\n    /**\n     * Constant of CAPTURING_PHASE.\n     * @type {number}\n     */\n    get CAPTURING_PHASE() {\n        return 1\n    },\n\n    /**\n     * Constant of AT_TARGET.\n     * @type {number}\n     */\n    get AT_TARGET() {\n        return 2\n    },\n\n    /**\n     * Constant of BUBBLING_PHASE.\n     * @type {number}\n     */\n    get BUBBLING_PHASE() {\n        return 3\n    },\n\n    /**\n     * The target of this event.\n     * @type {number}\n     */\n    get eventPhase() {\n        return pd(this).eventPhase\n    },\n\n    /**\n     * Stop event bubbling.\n     * @returns {void}\n     */\n    stopPropagation() {\n        const data = pd(this);\n\n        data.stopped = true;\n        if (typeof data.event.stopPropagation === \"function\") {\n            data.event.stopPropagation();\n        }\n    },\n\n    /**\n     * Stop event bubbling.\n     * @returns {void}\n     */\n    stopImmediatePropagation() {\n        const data = pd(this);\n\n        data.stopped = true;\n        data.immediateStopped = true;\n        if (typeof data.event.stopImmediatePropagation === \"function\") {\n            data.event.stopImmediatePropagation();\n        }\n    },\n\n    /**\n     * The flag to be bubbling.\n     * @type {boolean}\n     */\n    get bubbles() {\n        return Boolean(pd(this).event.bubbles)\n    },\n\n    /**\n     * The flag to be cancelable.\n     * @type {boolean}\n     */\n    get cancelable() {\n        return Boolean(pd(this).event.cancelable)\n    },\n\n    /**\n     * Cancel this event.\n     * @returns {void}\n     */\n    preventDefault() {\n        setCancelFlag(pd(this));\n    },\n\n    /**\n     * The flag to indicate cancellation state.\n     * @type {boolean}\n     */\n    get defaultPrevented() {\n        return pd(this).canceled\n    },\n\n    /**\n     * The flag to be composed.\n     * @type {boolean}\n     */\n    get composed() {\n        return Boolean(pd(this).event.composed)\n    },\n\n    /**\n     * The unix time of this event.\n     * @type {number}\n     */\n    get timeStamp() {\n        return pd(this).timeStamp\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     * @deprecated\n     */\n    get srcElement() {\n        return pd(this).eventTarget\n    },\n\n    /**\n     * The flag to stop event bubbling.\n     * @type {boolean}\n     * @deprecated\n     */\n    get cancelBubble() {\n        return pd(this).stopped\n    },\n    set cancelBubble(value) {\n        if (!value) {\n            return\n        }\n        const data = pd(this);\n\n        data.stopped = true;\n        if (typeof data.event.cancelBubble === \"boolean\") {\n            data.event.cancelBubble = true;\n        }\n    },\n\n    /**\n     * The flag to indicate cancellation state.\n     * @type {boolean}\n     * @deprecated\n     */\n    get returnValue() {\n        return !pd(this).canceled\n    },\n    set returnValue(value) {\n        if (!value) {\n            setCancelFlag(pd(this));\n        }\n    },\n\n    /**\n     * Initialize this event object. But do nothing under event dispatching.\n     * @param {string} type The event type.\n     * @param {boolean} [bubbles=false] The flag to be possible to bubble up.\n     * @param {boolean} [cancelable=false] The flag to be possible to cancel.\n     * @deprecated\n     */\n    initEvent() {\n        // Do nothing.\n    },\n};\n\n// `constructor` is not enumerable.\nObject.defineProperty(Event.prototype, \"constructor\", {\n    value: Event,\n    configurable: true,\n    writable: true,\n});\n\n// Ensure `event instanceof window.Event` is `true`.\nif (typeof window !== \"undefined\" && typeof window.Event !== \"undefined\") {\n    Object.setPrototypeOf(Event.prototype, window.Event.prototype);\n\n    // Make association for wrappers.\n    wrappers.set(window.Event.prototype, Event);\n}\n\n/**\n * Get the property descriptor to redirect a given property.\n * @param {string} key Property name to define property descriptor.\n * @returns {PropertyDescriptor} The property descriptor to redirect the property.\n * @private\n */\nfunction defineRedirectDescriptor(key) {\n    return {\n        get() {\n            return pd(this).event[key]\n        },\n        set(value) {\n            pd(this).event[key] = value;\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Get the property descriptor to call a given method property.\n * @param {string} key Property name to define property descriptor.\n * @returns {PropertyDescriptor} The property descriptor to call the method property.\n * @private\n */\nfunction defineCallDescriptor(key) {\n    return {\n        value() {\n            const event = pd(this).event;\n            return event[key].apply(event, arguments)\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Define new wrapper class.\n * @param {Function} BaseEvent The base wrapper class.\n * @param {Object} proto The prototype of the original event.\n * @returns {Function} The defined wrapper class.\n * @private\n */\nfunction defineWrapper(BaseEvent, proto) {\n    const keys = Object.keys(proto);\n    if (keys.length === 0) {\n        return BaseEvent\n    }\n\n    /** CustomEvent */\n    function CustomEvent(eventTarget, event) {\n        BaseEvent.call(this, eventTarget, event);\n    }\n\n    CustomEvent.prototype = Object.create(BaseEvent.prototype, {\n        constructor: { value: CustomEvent, configurable: true, writable: true },\n    });\n\n    // Define accessors.\n    for (let i = 0; i < keys.length; ++i) {\n        const key = keys[i];\n        if (!(key in BaseEvent.prototype)) {\n            const descriptor = Object.getOwnPropertyDescriptor(proto, key);\n            const isFunc = typeof descriptor.value === \"function\";\n            Object.defineProperty(\n                CustomEvent.prototype,\n                key,\n                isFunc\n                    ? defineCallDescriptor(key)\n                    : defineRedirectDescriptor(key)\n            );\n        }\n    }\n\n    return CustomEvent\n}\n\n/**\n * Get the wrapper class of a given prototype.\n * @param {Object} proto The prototype of the original event to get its wrapper.\n * @returns {Function} The wrapper class.\n * @private\n */\nfunction getWrapper(proto) {\n    if (proto == null || proto === Object.prototype) {\n        return Event\n    }\n\n    let wrapper = wrappers.get(proto);\n    if (wrapper == null) {\n        wrapper = defineWrapper(getWrapper(Object.getPrototypeOf(proto)), proto);\n        wrappers.set(proto, wrapper);\n    }\n    return wrapper\n}\n\n/**\n * Wrap a given event to management a dispatching.\n * @param {EventTarget} eventTarget The event target of this dispatching.\n * @param {Object} event The event to wrap.\n * @returns {Event} The wrapper instance.\n * @private\n */\nfunction wrapEvent(eventTarget, event) {\n    const Wrapper = getWrapper(Object.getPrototypeOf(event));\n    return new Wrapper(eventTarget, event)\n}\n\n/**\n * Get the immediateStopped flag of a given event.\n * @param {Event} event The event to get.\n * @returns {boolean} The flag to stop propagation immediately.\n * @private\n */\nfunction isStopped(event) {\n    return pd(event).immediateStopped\n}\n\n/**\n * Set the current event phase of a given event.\n * @param {Event} event The event to set current target.\n * @param {number} eventPhase New event phase.\n * @returns {void}\n * @private\n */\nfunction setEventPhase(event, eventPhase) {\n    pd(event).eventPhase = eventPhase;\n}\n\n/**\n * Set the current target of a given event.\n * @param {Event} event The event to set current target.\n * @param {EventTarget|null} currentTarget New current target.\n * @returns {void}\n * @private\n */\nfunction setCurrentTarget(event, currentTarget) {\n    pd(event).currentTarget = currentTarget;\n}\n\n/**\n * Set a passive listener of a given event.\n * @param {Event} event The event to set current target.\n * @param {Function|null} passiveListener New passive listener.\n * @returns {void}\n * @private\n */\nfunction setPassiveListener(event, passiveListener) {\n    pd(event).passiveListener = passiveListener;\n}\n\n/**\n * @typedef {object} ListenerNode\n * @property {Function} listener\n * @property {1|2|3} listenerType\n * @property {boolean} passive\n * @property {boolean} once\n * @property {ListenerNode|null} next\n * @private\n */\n\n/**\n * @type {WeakMap<object, Map<string, ListenerNode>>}\n * @private\n */\nconst listenersMap = new WeakMap();\n\n// Listener types\nconst CAPTURE = 1;\nconst BUBBLE = 2;\nconst ATTRIBUTE = 3;\n\n/**\n * Check whether a given value is an object or not.\n * @param {any} x The value to check.\n * @returns {boolean} `true` if the value is an object.\n */\nfunction isObject(x) {\n    return x !== null && typeof x === \"object\" //eslint-disable-line no-restricted-syntax\n}\n\n/**\n * Get listeners.\n * @param {EventTarget} eventTarget The event target to get.\n * @returns {Map<string, ListenerNode>} The listeners.\n * @private\n */\nfunction getListeners(eventTarget) {\n    const listeners = listenersMap.get(eventTarget);\n    if (listeners == null) {\n        throw new TypeError(\n            \"'this' is expected an EventTarget object, but got another value.\"\n        )\n    }\n    return listeners\n}\n\n/**\n * Get the property descriptor for the event attribute of a given event.\n * @param {string} eventName The event name to get property descriptor.\n * @returns {PropertyDescriptor} The property descriptor.\n * @private\n */\nfunction defineEventAttributeDescriptor(eventName) {\n    return {\n        get() {\n            const listeners = getListeners(this);\n            let node = listeners.get(eventName);\n            while (node != null) {\n                if (node.listenerType === ATTRIBUTE) {\n                    return node.listener\n                }\n                node = node.next;\n            }\n            return null\n        },\n\n        set(listener) {\n            if (typeof listener !== \"function\" && !isObject(listener)) {\n                listener = null; // eslint-disable-line no-param-reassign\n            }\n            const listeners = getListeners(this);\n\n            // Traverse to the tail while removing old value.\n            let prev = null;\n            let node = listeners.get(eventName);\n            while (node != null) {\n                if (node.listenerType === ATTRIBUTE) {\n                    // Remove old value.\n                    if (prev !== null) {\n                        prev.next = node.next;\n                    } else if (node.next !== null) {\n                        listeners.set(eventName, node.next);\n                    } else {\n                        listeners.delete(eventName);\n                    }\n                } else {\n                    prev = node;\n                }\n\n                node = node.next;\n            }\n\n            // Add new value.\n            if (listener !== null) {\n                const newNode = {\n                    listener,\n                    listenerType: ATTRIBUTE,\n                    passive: false,\n                    once: false,\n                    next: null,\n                };\n                if (prev === null) {\n                    listeners.set(eventName, newNode);\n                } else {\n                    prev.next = newNode;\n                }\n            }\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Define an event attribute (e.g. `eventTarget.onclick`).\n * @param {Object} eventTargetPrototype The event target prototype to define an event attrbite.\n * @param {string} eventName The event name to define.\n * @returns {void}\n */\nfunction defineEventAttribute(eventTargetPrototype, eventName) {\n    Object.defineProperty(\n        eventTargetPrototype,\n        `on${eventName}`,\n        defineEventAttributeDescriptor(eventName)\n    );\n}\n\n/**\n * Define a custom EventTarget with event attributes.\n * @param {string[]} eventNames Event names for event attributes.\n * @returns {EventTarget} The custom EventTarget.\n * @private\n */\nfunction defineCustomEventTarget(eventNames) {\n    /** CustomEventTarget */\n    function CustomEventTarget() {\n        EventTarget.call(this);\n    }\n\n    CustomEventTarget.prototype = Object.create(EventTarget.prototype, {\n        constructor: {\n            value: CustomEventTarget,\n            configurable: true,\n            writable: true,\n        },\n    });\n\n    for (let i = 0; i < eventNames.length; ++i) {\n        defineEventAttribute(CustomEventTarget.prototype, eventNames[i]);\n    }\n\n    return CustomEventTarget\n}\n\n/**\n * EventTarget.\n *\n * - This is constructor if no arguments.\n * - This is a function which returns a CustomEventTarget constructor if there are arguments.\n *\n * For example:\n *\n *     class A extends EventTarget {}\n *     class B extends EventTarget(\"message\") {}\n *     class C extends EventTarget(\"message\", \"error\") {}\n *     class D extends EventTarget([\"message\", \"error\"]) {}\n */\nfunction EventTarget() {\n    /*eslint-disable consistent-return */\n    if (this instanceof EventTarget) {\n        listenersMap.set(this, new Map());\n        return\n    }\n    if (arguments.length === 1 && Array.isArray(arguments[0])) {\n        return defineCustomEventTarget(arguments[0])\n    }\n    if (arguments.length > 0) {\n        const types = new Array(arguments.length);\n        for (let i = 0; i < arguments.length; ++i) {\n            types[i] = arguments[i];\n        }\n        return defineCustomEventTarget(types)\n    }\n    throw new TypeError(\"Cannot call a class as a function\")\n    /*eslint-enable consistent-return */\n}\n\n// Should be enumerable, but class methods are not enumerable.\nEventTarget.prototype = {\n    /**\n     * Add a given listener to this event target.\n     * @param {string} eventName The event name to add.\n     * @param {Function} listener The listener to add.\n     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.\n     * @returns {void}\n     */\n    addEventListener(eventName, listener, options) {\n        if (listener == null) {\n            return\n        }\n        if (typeof listener !== \"function\" && !isObject(listener)) {\n            throw new TypeError(\"'listener' should be a function or an object.\")\n        }\n\n        const listeners = getListeners(this);\n        const optionsIsObj = isObject(options);\n        const capture = optionsIsObj\n            ? Boolean(options.capture)\n            : Boolean(options);\n        const listenerType = capture ? CAPTURE : BUBBLE;\n        const newNode = {\n            listener,\n            listenerType,\n            passive: optionsIsObj && Boolean(options.passive),\n            once: optionsIsObj && Boolean(options.once),\n            next: null,\n        };\n\n        // Set it as the first node if the first node is null.\n        let node = listeners.get(eventName);\n        if (node === undefined) {\n            listeners.set(eventName, newNode);\n            return\n        }\n\n        // Traverse to the tail while checking duplication..\n        let prev = null;\n        while (node != null) {\n            if (\n                node.listener === listener &&\n                node.listenerType === listenerType\n            ) {\n                // Should ignore duplication.\n                return\n            }\n            prev = node;\n            node = node.next;\n        }\n\n        // Add it.\n        prev.next = newNode;\n    },\n\n    /**\n     * Remove a given listener from this event target.\n     * @param {string} eventName The event name to remove.\n     * @param {Function} listener The listener to remove.\n     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.\n     * @returns {void}\n     */\n    removeEventListener(eventName, listener, options) {\n        if (listener == null) {\n            return\n        }\n\n        const listeners = getListeners(this);\n        const capture = isObject(options)\n            ? Boolean(options.capture)\n            : Boolean(options);\n        const listenerType = capture ? CAPTURE : BUBBLE;\n\n        let prev = null;\n        let node = listeners.get(eventName);\n        while (node != null) {\n            if (\n                node.listener === listener &&\n                node.listenerType === listenerType\n            ) {\n                if (prev !== null) {\n                    prev.next = node.next;\n                } else if (node.next !== null) {\n                    listeners.set(eventName, node.next);\n                } else {\n                    listeners.delete(eventName);\n                }\n                return\n            }\n\n            prev = node;\n            node = node.next;\n        }\n    },\n\n    /**\n     * Dispatch a given event.\n     * @param {Event|{type:string}} event The event to dispatch.\n     * @returns {boolean} `false` if canceled.\n     */\n    dispatchEvent(event) {\n        if (event == null || typeof event.type !== \"string\") {\n            throw new TypeError('\"event.type\" should be a string.')\n        }\n\n        // If listeners aren't registered, terminate.\n        const listeners = getListeners(this);\n        const eventName = event.type;\n        let node = listeners.get(eventName);\n        if (node == null) {\n            return true\n        }\n\n        // Since we cannot rewrite several properties, so wrap object.\n        const wrappedEvent = wrapEvent(this, event);\n\n        // This doesn't process capturing phase and bubbling phase.\n        // This isn't participating in a tree.\n        let prev = null;\n        while (node != null) {\n            // Remove this listener if it's once\n            if (node.once) {\n                if (prev !== null) {\n                    prev.next = node.next;\n                } else if (node.next !== null) {\n                    listeners.set(eventName, node.next);\n                } else {\n                    listeners.delete(eventName);\n                }\n            } else {\n                prev = node;\n            }\n\n            // Call this listener\n            setPassiveListener(\n                wrappedEvent,\n                node.passive ? node.listener : null\n            );\n            if (typeof node.listener === \"function\") {\n                try {\n                    node.listener.call(this, wrappedEvent);\n                } catch (err) {\n                    if (\n                        typeof console !== \"undefined\" &&\n                        typeof console.error === \"function\"\n                    ) {\n                        console.error(err);\n                    }\n                }\n            } else if (\n                node.listenerType !== ATTRIBUTE &&\n                typeof node.listener.handleEvent === \"function\"\n            ) {\n                node.listener.handleEvent(wrappedEvent);\n            }\n\n            // Break if `event.stopImmediatePropagation` was called.\n            if (isStopped(wrappedEvent)) {\n                break\n            }\n\n            node = node.next;\n        }\n        setPassiveListener(wrappedEvent, null);\n        setEventPhase(wrappedEvent, 0);\n        setCurrentTarget(wrappedEvent, null);\n\n        return !wrappedEvent.defaultPrevented\n    },\n};\n\n// `constructor` is not enumerable.\nObject.defineProperty(EventTarget.prototype, \"constructor\", {\n    value: EventTarget,\n    configurable: true,\n    writable: true,\n});\n\n// Ensure `eventTarget instanceof window.EventTarget` is `true`.\nif (\n    typeof window !== \"undefined\" &&\n    typeof window.EventTarget !== \"undefined\"\n) {\n    Object.setPrototypeOf(EventTarget.prototype, window.EventTarget.prototype);\n}\n\nexport default EventTarget;\nexport { defineEventAttribute, EventTarget };\n//# sourceMappingURL=event-target-shim.mjs.map\n","import {\n    // Event,\n    EventTarget,\n    // Type,\n    defineEventAttribute,\n} from \"event-target-shim\"\n\n// Known Limitation\n//   Use `any` because the type of `AbortSignal` in `lib.dom.d.ts` is wrong and\n//   to make assignable our `AbortSignal` into that.\n//   https://github.com/Microsoft/TSJS-lib-generator/pull/623\ntype Events = {\n    abort: any // Event & Type<\"abort\">\n}\ntype EventAttributes = {\n    onabort: any // Event & Type<\"abort\">\n}\n\n/**\n * The signal class.\n * @see https://dom.spec.whatwg.org/#abortsignal\n */\nexport default class AbortSignal extends EventTarget<Events, EventAttributes> {\n    /**\n     * AbortSignal cannot be constructed directly.\n     */\n    public constructor() {\n        super()\n        throw new TypeError(\"AbortSignal cannot be constructed directly\")\n    }\n\n    /**\n     * Returns `true` if this `AbortSignal`'s `AbortController` has signaled to abort, and `false` otherwise.\n     */\n    public get aborted(): boolean {\n        const aborted = abortedFlags.get(this)\n        if (typeof aborted !== \"boolean\") {\n            throw new TypeError(\n                `Expected 'this' to be an 'AbortSignal' object, but got ${\n                    this === null ? \"null\" : typeof this\n                }`,\n            )\n        }\n        return aborted\n    }\n}\ndefineEventAttribute(AbortSignal.prototype, \"abort\")\n\n/**\n * Create an AbortSignal object.\n */\nexport function createAbortSignal(): AbortSignal {\n    const signal = Object.create(AbortSignal.prototype)\n    EventTarget.call(signal)\n    abortedFlags.set(signal, false)\n    return signal\n}\n\n/**\n * Abort a given signal.\n */\nexport function abortSignal(signal: AbortSignal): void {\n    if (abortedFlags.get(signal) !== false) {\n        return\n    }\n\n    abortedFlags.set(signal, true)\n    signal.dispatchEvent<\"abort\">({ type: \"abort\" })\n}\n\n/**\n * Aborted flag for each instances.\n */\nconst abortedFlags = new WeakMap<AbortSignal, boolean>()\n\n// Properties should be enumerable.\nObject.defineProperties(AbortSignal.prototype, {\n    aborted: { enumerable: true },\n})\n\n// `toString()` should return `\"[object AbortSignal]\"`\nif (typeof Symbol === \"function\" && typeof Symbol.toStringTag === \"symbol\") {\n    Object.defineProperty(AbortSignal.prototype, Symbol.toStringTag, {\n        configurable: true,\n        value: \"AbortSignal\",\n    })\n}\n","import AbortSignal, { abortSignal, createAbortSignal } from \"./abort-signal\"\n\n/**\n * The AbortController.\n * @see https://dom.spec.whatwg.org/#abortcontroller\n */\nexport default class AbortController {\n    /**\n     * Initialize this controller.\n     */\n    public constructor() {\n        signals.set(this, createAbortSignal())\n    }\n\n    /**\n     * Returns the `AbortSignal` object associated with this object.\n     */\n    public get signal(): AbortSignal {\n        return getSignal(this)\n    }\n\n    /**\n     * Abort and signal to any observers that the associated activity is to be aborted.\n     */\n    public abort(): void {\n        abortSignal(getSignal(this))\n    }\n}\n\n/**\n * Associated signals.\n */\nconst signals = new WeakMap<AbortController, AbortSignal>()\n\n/**\n * Get the associated signal of a given controller.\n */\nfunction getSignal(controller: AbortController): AbortSignal {\n    const signal = signals.get(controller)\n    if (signal == null) {\n        throw new TypeError(\n            `Expected 'this' to be an 'AbortController' object, but got ${\n                controller === null ? \"null\" : typeof controller\n            }`,\n        )\n    }\n    return signal\n}\n\n// Properties should be enumerable.\nObject.defineProperties(AbortController.prototype, {\n    signal: { enumerable: true },\n    abort: { enumerable: true },\n})\n\nif (typeof Symbol === \"function\" && typeof Symbol.toStringTag === \"symbol\") {\n    Object.defineProperty(AbortController.prototype, Symbol.toStringTag, {\n        configurable: true,\n        value: \"AbortController\",\n    })\n}\n\nexport { AbortController, AbortSignal 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\ No newline at end of file
diff --git a/mqtt-backend/node_modules/abort-controller/package.json b/mqtt-backend/node_modules/abort-controller/package.json
new file mode 100644
index 0000000..fc705e0
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/package.json
@@ -0,0 +1,97 @@
+{
+  "name": "abort-controller",
+  "version": "3.0.0",
+  "description": "An implementation of WHATWG AbortController interface.",
+  "main": "dist/abort-controller",
+  "files": [
+    "dist",
+    "polyfill.*",
+    "browser.*"
+  ],
+  "engines": {
+    "node": ">=6.5"
+  },
+  "dependencies": {
+    "event-target-shim": "^5.0.0"
+  },
+  "browser": "./browser.js",
+  "devDependencies": {
+    "@babel/core": "^7.2.2",
+    "@babel/plugin-transform-modules-commonjs": "^7.2.0",
+    "@babel/preset-env": "^7.3.0",
+    "@babel/register": "^7.0.0",
+    "@mysticatea/eslint-plugin": "^8.0.1",
+    "@mysticatea/spy": "^0.1.2",
+    "@types/mocha": "^5.2.5",
+    "@types/node": "^10.12.18",
+    "assert": "^1.4.1",
+    "codecov": "^3.1.0",
+    "dts-bundle-generator": "^2.0.0",
+    "eslint": "^5.12.1",
+    "karma": "^3.1.4",
+    "karma-chrome-launcher": "^2.2.0",
+    "karma-coverage": "^1.1.2",
+    "karma-firefox-launcher": "^1.1.0",
+    "karma-growl-reporter": "^1.0.0",
+    "karma-ie-launcher": "^1.0.0",
+    "karma-mocha": "^1.3.0",
+    "karma-rollup-preprocessor": "^7.0.0-rc.2",
+    "mocha": "^5.2.0",
+    "npm-run-all": "^4.1.5",
+    "nyc": "^13.1.0",
+    "opener": "^1.5.1",
+    "rimraf": "^2.6.3",
+    "rollup": "^1.1.2",
+    "rollup-plugin-babel": "^4.3.2",
+    "rollup-plugin-babel-minify": "^7.0.0",
+    "rollup-plugin-commonjs": "^9.2.0",
+    "rollup-plugin-node-resolve": "^4.0.0",
+    "rollup-plugin-sourcemaps": "^0.4.2",
+    "rollup-plugin-typescript": "^1.0.0",
+    "rollup-watch": "^4.3.1",
+    "ts-node": "^8.0.1",
+    "type-tester": "^1.0.0",
+    "typescript": "^3.2.4"
+  },
+  "scripts": {
+    "preversion": "npm test",
+    "version": "npm run -s build && git add dist/*",
+    "postversion": "git push && git push --tags",
+    "clean": "rimraf .nyc_output coverage",
+    "coverage": "opener coverage/lcov-report/index.html",
+    "lint": "eslint . --ext .ts",
+    "build": "run-s -s build:*",
+    "build:rollup": "rollup -c",
+    "build:dts": "dts-bundle-generator -o dist/abort-controller.d.ts src/abort-controller.ts && ts-node scripts/fix-dts",
+    "test": "run-s -s lint test:*",
+    "test:mocha": "nyc mocha test/*.ts",
+    "test:karma": "karma start --single-run",
+    "watch": "run-p -s watch:*",
+    "watch:mocha": "mocha test/*.ts --require ts-node/register --watch-extensions ts --watch --growl",
+    "watch:karma": "karma start --watch",
+    "codecov": "codecov"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/mysticatea/abort-controller.git"
+  },
+  "keywords": [
+    "w3c",
+    "whatwg",
+    "event",
+    "events",
+    "abort",
+    "cancel",
+    "abortcontroller",
+    "abortsignal",
+    "controller",
+    "signal",
+    "shim"
+  ],
+  "author": "Toru Nagashima (https://github.com/mysticatea)",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mysticatea/abort-controller/issues"
+  },
+  "homepage": "https://github.com/mysticatea/abort-controller#readme"
+}
diff --git a/mqtt-backend/node_modules/abort-controller/polyfill.js b/mqtt-backend/node_modules/abort-controller/polyfill.js
new file mode 100644
index 0000000..3ca8923
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/polyfill.js
@@ -0,0 +1,21 @@
+/*globals require, self, window */
+"use strict"
+
+const ac = require("./dist/abort-controller")
+
+/*eslint-disable @mysticatea/prettier */
+const g =
+    typeof self !== "undefined" ? self :
+    typeof window !== "undefined" ? window :
+    typeof global !== "undefined" ? global :
+    /* otherwise */ undefined
+/*eslint-enable @mysticatea/prettier */
+
+if (g) {
+    if (typeof g.AbortController === "undefined") {
+        g.AbortController = ac.AbortController
+    }
+    if (typeof g.AbortSignal === "undefined") {
+        g.AbortSignal = ac.AbortSignal
+    }
+}
diff --git a/mqtt-backend/node_modules/abort-controller/polyfill.mjs b/mqtt-backend/node_modules/abort-controller/polyfill.mjs
new file mode 100644
index 0000000..0602a64
--- /dev/null
+++ b/mqtt-backend/node_modules/abort-controller/polyfill.mjs
@@ -0,0 +1,19 @@
+/*globals self, window */
+import * as ac from "./dist/abort-controller"
+
+/*eslint-disable @mysticatea/prettier */
+const g =
+    typeof self !== "undefined" ? self :
+    typeof window !== "undefined" ? window :
+    typeof global !== "undefined" ? global :
+    /* otherwise */ undefined
+/*eslint-enable @mysticatea/prettier */
+
+if (g) {
+    if (typeof g.AbortController === "undefined") {
+        g.AbortController = ac.AbortController
+    }
+    if (typeof g.AbortSignal === "undefined") {
+        g.AbortSignal = ac.AbortSignal
+    }
+}
diff --git a/mqtt-backend/node_modules/aedes-packet/.github/dependabot.yml b/mqtt-backend/node_modules/aedes-packet/.github/dependabot.yml
new file mode 100644
index 0000000..ae17f3d
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/.github/dependabot.yml
@@ -0,0 +1,12 @@
+version: 2
+updates:
+- package-ecosystem: github-actions
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
diff --git a/mqtt-backend/node_modules/aedes-packet/.github/workflows/ci.yml b/mqtt-backend/node_modules/aedes-packet/.github/workflows/ci.yml
new file mode 100644
index 0000000..47a9562
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/.github/workflows/ci.yml
@@ -0,0 +1,34 @@
+name: ci
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+
+concurrency: 
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [14.x, 16.x, 18.x]
+
+    steps:
+      - uses: actions/checkout@v2.4.0
+
+      - name: Use Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Run tests
+        run: |
+          npm run test:ci
diff --git a/mqtt-backend/node_modules/aedes-packet/LICENSE b/mqtt-backend/node_modules/aedes-packet/LICENSE
new file mode 100644
index 0000000..8650273
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/LICENSE
@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) Aedes Contributors
+Copyright (c) 2015-2020 Matteo Collina, http://matteocollina.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/README.md b/mqtt-backend/node_modules/aedes-packet/README.md
new file mode 100644
index 0000000..cad12e6
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/README.md
@@ -0,0 +1,23 @@
+<!-- markdownlint-disable MD013 MD024 -->
+# aedes-packet
+
+![ci](https://github.com/moscajs/aedes-packet/workflows/ci/badge.svg)
+[![Known Vulnerabilities](https://snyk.io/test/github/moscajs/aedes-packet/badge.svg)](https://snyk.io/test/github/moscajs/aedes-packet)
+[![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat)](http://standardjs.com/)\
+[![Dependencies Status](https://david-dm.org/moscajs/aedes-packet/status.svg)](https://david-dm.org/moscajs/aedes-packet)
+[![devDependencies Status](https://david-dm.org/moscajs/aedes-packet/dev-status.svg)](https://david-dm.org/moscajs/aedes-packet?type=dev)\
+[![NPM version](https://img.shields.io/npm/v/aedes-packet.svg?style=flat)](https://www.npmjs.com/package/aedes-packet)
+[![NPM downloads](https://img.shields.io/npm/dm/aedes-packet.svg?style=flat)](https://www.npmjs.com/package/aedes-packet)
+
+Basic data structure for packets in [Aedes](https://www.npmjs.com/aedes), packaged up for perf and reusability between modules.
+
+See [./packet.js](./packet.js) and [./test.js](./test.js) for
+documentation and usage.
+
+## Collaborators
+
+* [__Gnought__](https://github.com/gnought)
+
+## License
+
+MIT
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/bl/.travis.yml b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/.travis.yml
new file mode 100644
index 0000000..016eaf5
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/.travis.yml
@@ -0,0 +1,17 @@
+sudo: false
+arch:
+ - amd64
+ - ppc64le
+language: node_js
+node_js:
+  - '6'
+  - '8'
+  - '10'
+  - '12'
+  - '14'
+  - '15'
+  - lts/*
+notifications:
+  email:
+    - rod@vagg.org
+    - matteo.collina@gmail.com
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/bl/BufferList.js b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/BufferList.js
new file mode 100644
index 0000000..471ee77
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/BufferList.js
@@ -0,0 +1,396 @@
+'use strict'
+
+const { Buffer } = require('buffer')
+const symbol = Symbol.for('BufferList')
+
+function BufferList (buf) {
+  if (!(this instanceof BufferList)) {
+    return new BufferList(buf)
+  }
+
+  BufferList._init.call(this, buf)
+}
+
+BufferList._init = function _init (buf) {
+  Object.defineProperty(this, symbol, { value: true })
+
+  this._bufs = []
+  this.length = 0
+
+  if (buf) {
+    this.append(buf)
+  }
+}
+
+BufferList.prototype._new = function _new (buf) {
+  return new BufferList(buf)
+}
+
+BufferList.prototype._offset = function _offset (offset) {
+  if (offset === 0) {
+    return [0, 0]
+  }
+
+  let tot = 0
+
+  for (let i = 0; i < this._bufs.length; i++) {
+    const _t = tot + this._bufs[i].length
+    if (offset < _t || i === this._bufs.length - 1) {
+      return [i, offset - tot]
+    }
+    tot = _t
+  }
+}
+
+BufferList.prototype._reverseOffset = function (blOffset) {
+  const bufferId = blOffset[0]
+  let offset = blOffset[1]
+
+  for (let i = 0; i < bufferId; i++) {
+    offset += this._bufs[i].length
+  }
+
+  return offset
+}
+
+BufferList.prototype.get = function get (index) {
+  if (index > this.length || index < 0) {
+    return undefined
+  }
+
+  const offset = this._offset(index)
+
+  return this._bufs[offset[0]][offset[1]]
+}
+
+BufferList.prototype.slice = function slice (start, end) {
+  if (typeof start === 'number' && start < 0) {
+    start += this.length
+  }
+
+  if (typeof end === 'number' && end < 0) {
+    end += this.length
+  }
+
+  return this.copy(null, 0, start, end)
+}
+
+BufferList.prototype.copy = function copy (dst, dstStart, srcStart, srcEnd) {
+  if (typeof srcStart !== 'number' || srcStart < 0) {
+    srcStart = 0
+  }
+
+  if (typeof srcEnd !== 'number' || srcEnd > this.length) {
+    srcEnd = this.length
+  }
+
+  if (srcStart >= this.length) {
+    return dst || Buffer.alloc(0)
+  }
+
+  if (srcEnd <= 0) {
+    return dst || Buffer.alloc(0)
+  }
+
+  const copy = !!dst
+  const off = this._offset(srcStart)
+  const len = srcEnd - srcStart
+  let bytes = len
+  let bufoff = (copy && dstStart) || 0
+  let start = off[1]
+
+  // copy/slice everything
+  if (srcStart === 0 && srcEnd === this.length) {
+    if (!copy) {
+      // slice, but full concat if multiple buffers
+      return this._bufs.length === 1
+        ? this._bufs[0]
+        : Buffer.concat(this._bufs, this.length)
+    }
+
+    // copy, need to copy individual buffers
+    for (let i = 0; i < this._bufs.length; i++) {
+      this._bufs[i].copy(dst, bufoff)
+      bufoff += this._bufs[i].length
+    }
+
+    return dst
+  }
+
+  // easy, cheap case where it's a subset of one of the buffers
+  if (bytes <= this._bufs[off[0]].length - start) {
+    return copy
+      ? this._bufs[off[0]].copy(dst, dstStart, start, start + bytes)
+      : this._bufs[off[0]].slice(start, start + bytes)
+  }
+
+  if (!copy) {
+    // a slice, we need something to copy in to
+    dst = Buffer.allocUnsafe(len)
+  }
+
+  for (let i = off[0]; i < this._bufs.length; i++) {
+    const l = this._bufs[i].length - start
+
+    if (bytes > l) {
+      this._bufs[i].copy(dst, bufoff, start)
+      bufoff += l
+    } else {
+      this._bufs[i].copy(dst, bufoff, start, start + bytes)
+      bufoff += l
+      break
+    }
+
+    bytes -= l
+
+    if (start) {
+      start = 0
+    }
+  }
+
+  // safeguard so that we don't return uninitialized memory
+  if (dst.length > bufoff) return dst.slice(0, bufoff)
+
+  return dst
+}
+
+BufferList.prototype.shallowSlice = function shallowSlice (start, end) {
+  start = start || 0
+  end = typeof end !== 'number' ? this.length : end
+
+  if (start < 0) {
+    start += this.length
+  }
+
+  if (end < 0) {
+    end += this.length
+  }
+
+  if (start === end) {
+    return this._new()
+  }
+
+  const startOffset = this._offset(start)
+  const endOffset = this._offset(end)
+  const buffers = this._bufs.slice(startOffset[0], endOffset[0] + 1)
+
+  if (endOffset[1] === 0) {
+    buffers.pop()
+  } else {
+    buffers[buffers.length - 1] = buffers[buffers.length - 1].slice(0, endOffset[1])
+  }
+
+  if (startOffset[1] !== 0) {
+    buffers[0] = buffers[0].slice(startOffset[1])
+  }
+
+  return this._new(buffers)
+}
+
+BufferList.prototype.toString = function toString (encoding, start, end) {
+  return this.slice(start, end).toString(encoding)
+}
+
+BufferList.prototype.consume = function consume (bytes) {
+  // first, normalize the argument, in accordance with how Buffer does it
+  bytes = Math.trunc(bytes)
+  // do nothing if not a positive number
+  if (Number.isNaN(bytes) || bytes <= 0) return this
+
+  while (this._bufs.length) {
+    if (bytes >= this._bufs[0].length) {
+      bytes -= this._bufs[0].length
+      this.length -= this._bufs[0].length
+      this._bufs.shift()
+    } else {
+      this._bufs[0] = this._bufs[0].slice(bytes)
+      this.length -= bytes
+      break
+    }
+  }
+
+  return this
+}
+
+BufferList.prototype.duplicate = function duplicate () {
+  const copy = this._new()
+
+  for (let i = 0; i < this._bufs.length; i++) {
+    copy.append(this._bufs[i])
+  }
+
+  return copy
+}
+
+BufferList.prototype.append = function append (buf) {
+  if (buf == null) {
+    return this
+  }
+
+  if (buf.buffer) {
+    // append a view of the underlying ArrayBuffer
+    this._appendBuffer(Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength))
+  } else if (Array.isArray(buf)) {
+    for (let i = 0; i < buf.length; i++) {
+      this.append(buf[i])
+    }
+  } else if (this._isBufferList(buf)) {
+    // unwrap argument into individual BufferLists
+    for (let i = 0; i < buf._bufs.length; i++) {
+      this.append(buf._bufs[i])
+    }
+  } else {
+    // coerce number arguments to strings, since Buffer(number) does
+    // uninitialized memory allocation
+    if (typeof buf === 'number') {
+      buf = buf.toString()
+    }
+
+    this._appendBuffer(Buffer.from(buf))
+  }
+
+  return this
+}
+
+BufferList.prototype._appendBuffer = function appendBuffer (buf) {
+  this._bufs.push(buf)
+  this.length += buf.length
+}
+
+BufferList.prototype.indexOf = function (search, offset, encoding) {
+  if (encoding === undefined && typeof offset === 'string') {
+    encoding = offset
+    offset = undefined
+  }
+
+  if (typeof search === 'function' || Array.isArray(search)) {
+    throw new TypeError('The "value" argument must be one of type string, Buffer, BufferList, or Uint8Array.')
+  } else if (typeof search === 'number') {
+    search = Buffer.from([search])
+  } else if (typeof search === 'string') {
+    search = Buffer.from(search, encoding)
+  } else if (this._isBufferList(search)) {
+    search = search.slice()
+  } else if (Array.isArray(search.buffer)) {
+    search = Buffer.from(search.buffer, search.byteOffset, search.byteLength)
+  } else if (!Buffer.isBuffer(search)) {
+    search = Buffer.from(search)
+  }
+
+  offset = Number(offset || 0)
+
+  if (isNaN(offset)) {
+    offset = 0
+  }
+
+  if (offset < 0) {
+    offset = this.length + offset
+  }
+
+  if (offset < 0) {
+    offset = 0
+  }
+
+  if (search.length === 0) {
+    return offset > this.length ? this.length : offset
+  }
+
+  const blOffset = this._offset(offset)
+  let blIndex = blOffset[0] // index of which internal buffer we're working on
+  let buffOffset = blOffset[1] // offset of the internal buffer we're working on
+
+  // scan over each buffer
+  for (; blIndex < this._bufs.length; blIndex++) {
+    const buff = this._bufs[blIndex]
+
+    while (buffOffset < buff.length) {
+      const availableWindow = buff.length - buffOffset
+
+      if (availableWindow >= search.length) {
+        const nativeSearchResult = buff.indexOf(search, buffOffset)
+
+        if (nativeSearchResult !== -1) {
+          return this._reverseOffset([blIndex, nativeSearchResult])
+        }
+
+        buffOffset = buff.length - search.length + 1 // end of native search window
+      } else {
+        const revOffset = this._reverseOffset([blIndex, buffOffset])
+
+        if (this._match(revOffset, search)) {
+          return revOffset
+        }
+
+        buffOffset++
+      }
+    }
+
+    buffOffset = 0
+  }
+
+  return -1
+}
+
+BufferList.prototype._match = function (offset, search) {
+  if (this.length - offset < search.length) {
+    return false
+  }
+
+  for (let searchOffset = 0; searchOffset < search.length; searchOffset++) {
+    if (this.get(offset + searchOffset) !== search[searchOffset]) {
+      return false
+    }
+  }
+  return true
+}
+
+;(function () {
+  const methods = {
+    readDoubleBE: 8,
+    readDoubleLE: 8,
+    readFloatBE: 4,
+    readFloatLE: 4,
+    readInt32BE: 4,
+    readInt32LE: 4,
+    readUInt32BE: 4,
+    readUInt32LE: 4,
+    readInt16BE: 2,
+    readInt16LE: 2,
+    readUInt16BE: 2,
+    readUInt16LE: 2,
+    readInt8: 1,
+    readUInt8: 1,
+    readIntBE: null,
+    readIntLE: null,
+    readUIntBE: null,
+    readUIntLE: null
+  }
+
+  for (const m in methods) {
+    (function (m) {
+      if (methods[m] === null) {
+        BufferList.prototype[m] = function (offset, byteLength) {
+          return this.slice(offset, offset + byteLength)[m](0, byteLength)
+        }
+      } else {
+        BufferList.prototype[m] = function (offset = 0) {
+          return this.slice(offset, offset + methods[m])[m](0)
+        }
+      }
+    }(m))
+  }
+}())
+
+// Used internally by the class and also as an indicator of this object being
+// a `BufferList`. It's not possible to use `instanceof BufferList` in a browser
+// environment because there could be multiple different copies of the
+// BufferList class and some `BufferList`s might be `BufferList`s.
+BufferList.prototype._isBufferList = function _isBufferList (b) {
+  return b instanceof BufferList || BufferList.isBufferList(b)
+}
+
+BufferList.isBufferList = function isBufferList (b) {
+  return b != null && b[symbol]
+}
+
+module.exports = BufferList
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/bl/LICENSE.md b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/LICENSE.md
new file mode 100644
index 0000000..ecbe516
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/LICENSE.md
@@ -0,0 +1,13 @@
+The MIT License (MIT)
+=====================
+
+Copyright (c) 2013-2019 bl contributors
+----------------------------------
+
+*bl contributors listed at <https://github.com/rvagg/bl#contributors>*
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/bl/README.md b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/README.md
new file mode 100644
index 0000000..9680b1d
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/README.md
@@ -0,0 +1,247 @@
+# bl *(BufferList)*
+
+[![Build Status](https://api.travis-ci.com/rvagg/bl.svg?branch=master)](https://travis-ci.com/rvagg/bl/)
+
+**A Node.js Buffer list collector, reader and streamer thingy.**
+
+[![NPM](https://nodei.co/npm/bl.svg)](https://nodei.co/npm/bl/)
+
+**bl** is a storage object for collections of Node Buffers, exposing them with the main Buffer readable API. Also works as a duplex stream so you can collect buffers from a stream that emits them and emit buffers to a stream that consumes them!
+
+The original buffers are kept intact and copies are only done as necessary. Any reads that require the use of a single original buffer will return a slice of that buffer only (which references the same memory as the original buffer). Reads that span buffers perform concatenation as required and return the results transparently.
+
+```js
+const { BufferList } = require('bl')
+
+const bl = new BufferList()
+bl.append(Buffer.from('abcd'))
+bl.append(Buffer.from('efg'))
+bl.append('hi')                     // bl will also accept & convert Strings
+bl.append(Buffer.from('j'))
+bl.append(Buffer.from([ 0x3, 0x4 ]))
+
+console.log(bl.length) // 12
+
+console.log(bl.slice(0, 10).toString('ascii')) // 'abcdefghij'
+console.log(bl.slice(3, 10).toString('ascii')) // 'defghij'
+console.log(bl.slice(3, 6).toString('ascii'))  // 'def'
+console.log(bl.slice(3, 8).toString('ascii'))  // 'defgh'
+console.log(bl.slice(5, 10).toString('ascii')) // 'fghij'
+
+console.log(bl.indexOf('def')) // 3
+console.log(bl.indexOf('asdf')) // -1
+
+// or just use toString!
+console.log(bl.toString())               // 'abcdefghij\u0003\u0004'
+console.log(bl.toString('ascii', 3, 8))  // 'defgh'
+console.log(bl.toString('ascii', 5, 10)) // 'fghij'
+
+// other standard Buffer readables
+console.log(bl.readUInt16BE(10)) // 0x0304
+console.log(bl.readUInt16LE(10)) // 0x0403
+```
+
+Give it a callback in the constructor and use it just like **[concat-stream](https://github.com/maxogden/node-concat-stream)**:
+
+```js
+const { BufferListStream } = require('bl')
+const fs = require('fs')
+
+fs.createReadStream('README.md')
+  .pipe(BufferListStream((err, data) => { // note 'new' isn't strictly required
+    // `data` is a complete Buffer object containing the full data
+    console.log(data.toString())
+  }))
+```
+
+Note that when you use the *callback* method like this, the resulting `data` parameter is a concatenation of all `Buffer` objects in the list. If you want to avoid the overhead of this concatenation (in cases of extreme performance consciousness), then avoid the *callback* method and just listen to `'end'` instead, like a standard Stream.
+
+Or to fetch a URL using [hyperquest](https://github.com/substack/hyperquest) (should work with [request](http://github.com/mikeal/request) and even plain Node http too!):
+
+```js
+const hyperquest = require('hyperquest')
+const { BufferListStream } = require('bl')
+
+const url = 'https://raw.github.com/rvagg/bl/master/README.md'
+
+hyperquest(url).pipe(BufferListStream((err, data) => {
+  console.log(data.toString())
+}))
+```
+
+Or, use it as a readable stream to recompose a list of Buffers to an output source:
+
+```js
+const { BufferListStream } = require('bl')
+const fs = require('fs')
+
+var bl = new BufferListStream()
+bl.append(Buffer.from('abcd'))
+bl.append(Buffer.from('efg'))
+bl.append(Buffer.from('hi'))
+bl.append(Buffer.from('j'))
+
+bl.pipe(fs.createWriteStream('gibberish.txt'))
+```
+
+## API
+
+  * <a href="#ctor"><code><b>new BufferList([ buf ])</b></code></a>
+  * <a href="#isBufferList"><code><b>BufferList.isBufferList(obj)</b></code></a>
+  * <a href="#length"><code>bl.<b>length</b></code></a>
+  * <a href="#append"><code>bl.<b>append(buffer)</b></code></a>
+  * <a href="#get"><code>bl.<b>get(index)</b></code></a>
+  * <a href="#indexOf"><code>bl.<b>indexOf(value[, byteOffset][, encoding])</b></code></a>
+  * <a href="#slice"><code>bl.<b>slice([ start[, end ] ])</b></code></a>
+  * <a href="#shallowSlice"><code>bl.<b>shallowSlice([ start[, end ] ])</b></code></a>
+  * <a href="#copy"><code>bl.<b>copy(dest, [ destStart, [ srcStart [, srcEnd ] ] ])</b></code></a>
+  * <a href="#duplicate"><code>bl.<b>duplicate()</b></code></a>
+  * <a href="#consume"><code>bl.<b>consume(bytes)</b></code></a>
+  * <a href="#toString"><code>bl.<b>toString([encoding, [ start, [ end ]]])</b></code></a>
+  * <a href="#readXX"><code>bl.<b>readDoubleBE()</b></code>, <code>bl.<b>readDoubleLE()</b></code>, <code>bl.<b>readFloatBE()</b></code>, <code>bl.<b>readFloatLE()</b></code>, <code>bl.<b>readInt32BE()</b></code>, <code>bl.<b>readInt32LE()</b></code>, <code>bl.<b>readUInt32BE()</b></code>, <code>bl.<b>readUInt32LE()</b></code>, <code>bl.<b>readInt16BE()</b></code>, <code>bl.<b>readInt16LE()</b></code>, <code>bl.<b>readUInt16BE()</b></code>, <code>bl.<b>readUInt16LE()</b></code>, <code>bl.<b>readInt8()</b></code>, <code>bl.<b>readUInt8()</b></code></a>
+  * <a href="#ctorStream"><code><b>new BufferListStream([ callback ])</b></code></a>
+
+--------------------------------------------------------
+<a name="ctor"></a>
+### new BufferList([ Buffer | Buffer array | BufferList | BufferList array | String ])
+No arguments are _required_ for the constructor, but you can initialise the list by passing in a single `Buffer` object or an array of `Buffer` objects.
+
+`new` is not strictly required, if you don't instantiate a new object, it will be done automatically for you so you can create a new instance simply with:
+
+```js
+const { BufferList } = require('bl')
+const bl = BufferList()
+
+// equivalent to:
+
+const { BufferList } = require('bl')
+const bl = new BufferList()
+```
+
+--------------------------------------------------------
+<a name="isBufferList"></a>
+### BufferList.isBufferList(obj)
+Determines if the passed object is a `BufferList`. It will return `true` if the passed object is an instance of `BufferList` **or** `BufferListStream` and `false` otherwise.
+
+N.B. this won't return `true` for `BufferList` or `BufferListStream` instances created by versions of this library before this static method was added.
+
+--------------------------------------------------------
+<a name="length"></a>
+### bl.length
+Get the length of the list in bytes. This is the sum of the lengths of all of the buffers contained in the list, minus any initial offset for a semi-consumed buffer at the beginning. Should accurately represent the total number of bytes that can be read from the list.
+
+--------------------------------------------------------
+<a name="append"></a>
+### bl.append(Buffer | Buffer array | BufferList | BufferList array | String)
+`append(buffer)` adds an additional buffer or BufferList to the internal list. `this` is returned so it can be chained.
+
+--------------------------------------------------------
+<a name="get"></a>
+### bl.get(index)
+`get()` will return the byte at the specified index.
+
+--------------------------------------------------------
+<a name="indexOf"></a>
+### bl.indexOf(value[, byteOffset][, encoding])
+`get()` will return the byte at the specified index.
+`indexOf()` method returns the first index at which a given element can be found in the BufferList, or -1 if it is not present.
+
+--------------------------------------------------------
+<a name="slice"></a>
+### bl.slice([ start, [ end ] ])
+`slice()` returns a new `Buffer` object containing the bytes within the range specified. Both `start` and `end` are optional and will default to the beginning and end of the list respectively.
+
+If the requested range spans a single internal buffer then a slice of that buffer will be returned which shares the original memory range of that Buffer. If the range spans multiple buffers then copy operations will likely occur to give you a uniform Buffer.
+
+--------------------------------------------------------
+<a name="shallowSlice"></a>
+### bl.shallowSlice([ start, [ end ] ])
+`shallowSlice()` returns a new `BufferList` object containing the bytes within the range specified. Both `start` and `end` are optional and will default to the beginning and end of the list respectively.
+
+No copies will be performed. All buffers in the result share memory with the original list.
+
+--------------------------------------------------------
+<a name="copy"></a>
+### bl.copy(dest, [ destStart, [ srcStart [, srcEnd ] ] ])
+`copy()` copies the content of the list in the `dest` buffer, starting from `destStart` and containing the bytes within the range specified with `srcStart` to `srcEnd`. `destStart`, `start` and `end` are optional and will default to the beginning of the `dest` buffer, and the beginning and end of the list respectively.
+
+--------------------------------------------------------
+<a name="duplicate"></a>
+### bl.duplicate()
+`duplicate()` performs a **shallow-copy** of the list. The internal Buffers remains the same, so if you change the underlying Buffers, the change will be reflected in both the original and the duplicate. This method is needed if you want to call `consume()` or `pipe()` and still keep the original list.Example:
+
+```js
+var bl = new BufferListStream()
+
+bl.append('hello')
+bl.append(' world')
+bl.append('\n')
+
+bl.duplicate().pipe(process.stdout, { end: false })
+
+console.log(bl.toString())
+```
+
+--------------------------------------------------------
+<a name="consume"></a>
+### bl.consume(bytes)
+`consume()` will shift bytes *off the start of the list*. The number of bytes consumed don't need to line up with the sizes of the internal Buffers&mdash;initial offsets will be calculated accordingly in order to give you a consistent view of the data.
+
+--------------------------------------------------------
+<a name="toString"></a>
+### bl.toString([encoding, [ start, [ end ]]])
+`toString()` will return a string representation of the buffer. The optional `start` and `end` arguments are passed on to `slice()`, while the `encoding` is passed on to `toString()` of the resulting Buffer. See the [Buffer#toString()](http://nodejs.org/docs/latest/api/buffer.html#buffer_buf_tostring_encoding_start_end) documentation for more information.
+
+--------------------------------------------------------
+<a name="readXX"></a>
+### bl.readDoubleBE(), bl.readDoubleLE(), bl.readFloatBE(), bl.readFloatLE(), bl.readInt32BE(), bl.readInt32LE(), bl.readUInt32BE(), bl.readUInt32LE(), bl.readInt16BE(), bl.readInt16LE(), bl.readUInt16BE(), bl.readUInt16LE(), bl.readInt8(), bl.readUInt8()
+
+All of the standard byte-reading methods of the `Buffer` interface are implemented and will operate across internal Buffer boundaries transparently.
+
+See the <b><code>[Buffer](http://nodejs.org/docs/latest/api/buffer.html)</code></b> documentation for how these work.
+
+--------------------------------------------------------
+<a name="ctorStream"></a>
+### new BufferListStream([ callback | Buffer | Buffer array | BufferList | BufferList array | String ])
+**BufferListStream** is a Node **[Duplex Stream](http://nodejs.org/docs/latest/api/stream.html#stream_class_stream_duplex)**, so it can be read from and written to like a standard Node stream. You can also `pipe()` to and from a **BufferListStream** instance.
+
+The constructor takes an optional callback, if supplied, the callback will be called with an error argument followed by a reference to the **bl** instance, when `bl.end()` is called (i.e. from a piped stream). This is a convenient method of collecting the entire contents of a stream, particularly when the stream is *chunky*, such as a network stream.
+
+Normally, no arguments are required for the constructor, but you can initialise the list by passing in a single `Buffer` object or an array of `Buffer` object.
+
+`new` is not strictly required, if you don't instantiate a new object, it will be done automatically for you so you can create a new instance simply with:
+
+```js
+const { BufferListStream } = require('bl')
+const bl = BufferListStream()
+
+// equivalent to:
+
+const { BufferListStream } = require('bl')
+const bl = new BufferListStream()
+```
+
+N.B. For backwards compatibility reasons, `BufferListStream` is the **default** export when you `require('bl')`:
+
+```js
+const { BufferListStream } = require('bl')
+// equivalent to:
+const BufferListStream = require('bl')
+```
+
+--------------------------------------------------------
+
+## Contributors
+
+**bl** is brought to you by the following hackers:
+
+ * [Rod Vagg](https://github.com/rvagg)
+ * [Matteo Collina](https://github.com/mcollina)
+ * [Jarett Cruger](https://github.com/jcrugzz)
+
+<a name="license"></a>
+## License &amp; copyright
+
+Copyright (c) 2013-2019 bl contributors (listed above).
+
+bl is licensed under the MIT license. All rights not explicitly granted in the MIT license are reserved. See the included LICENSE.md file for more details.
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/bl/bl.js b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/bl.js
new file mode 100644
index 0000000..40228f8
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/bl.js
@@ -0,0 +1,84 @@
+'use strict'
+
+const DuplexStream = require('readable-stream').Duplex
+const inherits = require('inherits')
+const BufferList = require('./BufferList')
+
+function BufferListStream (callback) {
+  if (!(this instanceof BufferListStream)) {
+    return new BufferListStream(callback)
+  }
+
+  if (typeof callback === 'function') {
+    this._callback = callback
+
+    const piper = function piper (err) {
+      if (this._callback) {
+        this._callback(err)
+        this._callback = null
+      }
+    }.bind(this)
+
+    this.on('pipe', function onPipe (src) {
+      src.on('error', piper)
+    })
+    this.on('unpipe', function onUnpipe (src) {
+      src.removeListener('error', piper)
+    })
+
+    callback = null
+  }
+
+  BufferList._init.call(this, callback)
+  DuplexStream.call(this)
+}
+
+inherits(BufferListStream, DuplexStream)
+Object.assign(BufferListStream.prototype, BufferList.prototype)
+
+BufferListStream.prototype._new = function _new (callback) {
+  return new BufferListStream(callback)
+}
+
+BufferListStream.prototype._write = function _write (buf, encoding, callback) {
+  this._appendBuffer(buf)
+
+  if (typeof callback === 'function') {
+    callback()
+  }
+}
+
+BufferListStream.prototype._read = function _read (size) {
+  if (!this.length) {
+    return this.push(null)
+  }
+
+  size = Math.min(size, this.length)
+  this.push(this.slice(0, size))
+  this.consume(size)
+}
+
+BufferListStream.prototype.end = function end (chunk) {
+  DuplexStream.prototype.end.call(this, chunk)
+
+  if (this._callback) {
+    this._callback(null, this.slice())
+    this._callback = null
+  }
+}
+
+BufferListStream.prototype._destroy = function _destroy (err, cb) {
+  this._bufs.length = 0
+  this.length = 0
+  cb(err)
+}
+
+BufferListStream.prototype._isBufferList = function _isBufferList (b) {
+  return b instanceof BufferListStream || b instanceof BufferList || BufferListStream.isBufferList(b)
+}
+
+BufferListStream.isBufferList = BufferList.isBufferList
+
+module.exports = BufferListStream
+module.exports.BufferListStream = BufferListStream
+module.exports.BufferList = BufferList
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/bl/package.json b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/package.json
new file mode 100644
index 0000000..3b2be3f
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/package.json
@@ -0,0 +1,37 @@
+{
+  "name": "bl",
+  "version": "4.1.0",
+  "description": "Buffer List: collect buffers and access with a standard readable Buffer interface, streamable too!",
+  "license": "MIT",
+  "main": "bl.js",
+  "scripts": {
+    "lint": "standard *.js test/*.js",
+    "test": "npm run lint && node test/test.js | faucet"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/rvagg/bl.git"
+  },
+  "homepage": "https://github.com/rvagg/bl",
+  "authors": [
+    "Rod Vagg <rod@vagg.org> (https://github.com/rvagg)",
+    "Matteo Collina <matteo.collina@gmail.com> (https://github.com/mcollina)",
+    "Jarett Cruger <jcrugzz@gmail.com> (https://github.com/jcrugzz)"
+  ],
+  "keywords": [
+    "buffer",
+    "buffers",
+    "stream",
+    "awesomesauce"
+  ],
+  "dependencies": {
+    "buffer": "^5.5.0",
+    "inherits": "^2.0.4",
+    "readable-stream": "^3.4.0"
+  },
+  "devDependencies": {
+    "faucet": "~0.0.1",
+    "standard": "^14.3.0",
+    "tape": "^4.11.0"
+  }
+}
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/convert.js b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/convert.js
new file mode 100644
index 0000000..9f3e235
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/convert.js
@@ -0,0 +1,21 @@
+'use strict'
+
+const tape = require('tape')
+const { BufferList, BufferListStream } = require('../')
+const { Buffer } = require('buffer')
+
+tape('convert from BufferList to BufferListStream', (t) => {
+  const data = Buffer.from(`TEST-${Date.now()}`)
+  const bl = new BufferList(data)
+  const bls = new BufferListStream(bl)
+  t.ok(bl.slice().equals(bls.slice()))
+  t.end()
+})
+
+tape('convert from BufferListStream to BufferList', (t) => {
+  const data = Buffer.from(`TEST-${Date.now()}`)
+  const bls = new BufferListStream(data)
+  const bl = new BufferList(bls)
+  t.ok(bl.slice().equals(bls.slice()))
+  t.end()
+})
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/indexOf.js b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/indexOf.js
new file mode 100644
index 0000000..62dcb01
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/indexOf.js
@@ -0,0 +1,492 @@
+'use strict'
+
+const tape = require('tape')
+const BufferList = require('../')
+const { Buffer } = require('buffer')
+
+tape('indexOf single byte needle', (t) => {
+  const bl = new BufferList(['abcdefg', 'abcdefg', '12345'])
+
+  t.equal(bl.indexOf('e'), 4)
+  t.equal(bl.indexOf('e', 5), 11)
+  t.equal(bl.indexOf('e', 12), -1)
+  t.equal(bl.indexOf('5'), 18)
+
+  t.end()
+})
+
+tape('indexOf multiple byte needle', (t) => {
+  const bl = new BufferList(['abcdefg', 'abcdefg'])
+
+  t.equal(bl.indexOf('ef'), 4)
+  t.equal(bl.indexOf('ef', 5), 11)
+
+  t.end()
+})
+
+tape('indexOf multiple byte needles across buffer boundaries', (t) => {
+  const bl = new BufferList(['abcdefg', 'abcdefg'])
+
+  t.equal(bl.indexOf('fgabc'), 5)
+
+  t.end()
+})
+
+tape('indexOf takes a Uint8Array search', (t) => {
+  const bl = new BufferList(['abcdefg', 'abcdefg'])
+  const search = new Uint8Array([102, 103, 97, 98, 99]) // fgabc
+
+  t.equal(bl.indexOf(search), 5)
+
+  t.end()
+})
+
+tape('indexOf takes a buffer list search', (t) => {
+  const bl = new BufferList(['abcdefg', 'abcdefg'])
+  const search = new BufferList('fgabc')
+
+  t.equal(bl.indexOf(search), 5)
+
+  t.end()
+})
+
+tape('indexOf a zero byte needle', (t) => {
+  const b = new BufferList('abcdef')
+  const bufEmpty = Buffer.from('')
+
+  t.equal(b.indexOf(''), 0)
+  t.equal(b.indexOf('', 1), 1)
+  t.equal(b.indexOf('', b.length + 1), b.length)
+  t.equal(b.indexOf('', Infinity), b.length)
+  t.equal(b.indexOf(bufEmpty), 0)
+  t.equal(b.indexOf(bufEmpty, 1), 1)
+  t.equal(b.indexOf(bufEmpty, b.length + 1), b.length)
+  t.equal(b.indexOf(bufEmpty, Infinity), b.length)
+
+  t.end()
+})
+
+tape('indexOf buffers smaller and larger than the needle', (t) => {
+  const bl = new BufferList(['abcdefg', 'a', 'bcdefg', 'a', 'bcfgab'])
+
+  t.equal(bl.indexOf('fgabc'), 5)
+  t.equal(bl.indexOf('fgabc', 6), 12)
+  t.equal(bl.indexOf('fgabc', 13), -1)
+
+  t.end()
+})
+
+// only present in node 6+
+;(process.version.substr(1).split('.')[0] >= 6) && tape('indexOf latin1 and binary encoding', (t) => {
+  const b = new BufferList('abcdef')
+
+  // test latin1 encoding
+  t.equal(
+    new BufferList(Buffer.from(b.toString('latin1'), 'latin1'))
+      .indexOf('d', 0, 'latin1'),
+    3
+  )
+  t.equal(
+    new BufferList(Buffer.from(b.toString('latin1'), 'latin1'))
+      .indexOf(Buffer.from('d', 'latin1'), 0, 'latin1'),
+    3
+  )
+  t.equal(
+    new BufferList(Buffer.from('aa\u00e8aa', 'latin1'))
+      .indexOf('\u00e8', 'latin1'),
+    2
+  )
+  t.equal(
+    new BufferList(Buffer.from('\u00e8', 'latin1'))
+      .indexOf('\u00e8', 'latin1'),
+    0
+  )
+  t.equal(
+    new BufferList(Buffer.from('\u00e8', 'latin1'))
+      .indexOf(Buffer.from('\u00e8', 'latin1'), 'latin1'),
+    0
+  )
+
+  // test binary encoding
+  t.equal(
+    new BufferList(Buffer.from(b.toString('binary'), 'binary'))
+      .indexOf('d', 0, 'binary'),
+    3
+  )
+  t.equal(
+    new BufferList(Buffer.from(b.toString('binary'), 'binary'))
+      .indexOf(Buffer.from('d', 'binary'), 0, 'binary'),
+    3
+  )
+  t.equal(
+    new BufferList(Buffer.from('aa\u00e8aa', 'binary'))
+      .indexOf('\u00e8', 'binary'),
+    2
+  )
+  t.equal(
+    new BufferList(Buffer.from('\u00e8', 'binary'))
+      .indexOf('\u00e8', 'binary'),
+    0
+  )
+  t.equal(
+    new BufferList(Buffer.from('\u00e8', 'binary'))
+      .indexOf(Buffer.from('\u00e8', 'binary'), 'binary'),
+    0
+  )
+
+  t.end()
+})
+
+tape('indexOf the entire nodejs10 buffer test suite', (t) => {
+  const b = new BufferList('abcdef')
+  const bufA = Buffer.from('a')
+  const bufBc = Buffer.from('bc')
+  const bufF = Buffer.from('f')
+  const bufZ = Buffer.from('z')
+
+  const stringComparison = 'abcdef'
+
+  t.equal(b.indexOf('a'), 0)
+  t.equal(b.indexOf('a', 1), -1)
+  t.equal(b.indexOf('a', -1), -1)
+  t.equal(b.indexOf('a', -4), -1)
+  t.equal(b.indexOf('a', -b.length), 0)
+  t.equal(b.indexOf('a', NaN), 0)
+  t.equal(b.indexOf('a', -Infinity), 0)
+  t.equal(b.indexOf('a', Infinity), -1)
+  t.equal(b.indexOf('bc'), 1)
+  t.equal(b.indexOf('bc', 2), -1)
+  t.equal(b.indexOf('bc', -1), -1)
+  t.equal(b.indexOf('bc', -3), -1)
+  t.equal(b.indexOf('bc', -5), 1)
+  t.equal(b.indexOf('bc', NaN), 1)
+  t.equal(b.indexOf('bc', -Infinity), 1)
+  t.equal(b.indexOf('bc', Infinity), -1)
+  t.equal(b.indexOf('f'), b.length - 1)
+  t.equal(b.indexOf('z'), -1)
+
+  // empty search tests
+  t.equal(b.indexOf(bufA), 0)
+  t.equal(b.indexOf(bufA, 1), -1)
+  t.equal(b.indexOf(bufA, -1), -1)
+  t.equal(b.indexOf(bufA, -4), -1)
+  t.equal(b.indexOf(bufA, -b.length), 0)
+  t.equal(b.indexOf(bufA, NaN), 0)
+  t.equal(b.indexOf(bufA, -Infinity), 0)
+  t.equal(b.indexOf(bufA, Infinity), -1)
+  t.equal(b.indexOf(bufBc), 1)
+  t.equal(b.indexOf(bufBc, 2), -1)
+  t.equal(b.indexOf(bufBc, -1), -1)
+  t.equal(b.indexOf(bufBc, -3), -1)
+  t.equal(b.indexOf(bufBc, -5), 1)
+  t.equal(b.indexOf(bufBc, NaN), 1)
+  t.equal(b.indexOf(bufBc, -Infinity), 1)
+  t.equal(b.indexOf(bufBc, Infinity), -1)
+  t.equal(b.indexOf(bufF), b.length - 1)
+  t.equal(b.indexOf(bufZ), -1)
+  t.equal(b.indexOf(0x61), 0)
+  t.equal(b.indexOf(0x61, 1), -1)
+  t.equal(b.indexOf(0x61, -1), -1)
+  t.equal(b.indexOf(0x61, -4), -1)
+  t.equal(b.indexOf(0x61, -b.length), 0)
+  t.equal(b.indexOf(0x61, NaN), 0)
+  t.equal(b.indexOf(0x61, -Infinity), 0)
+  t.equal(b.indexOf(0x61, Infinity), -1)
+  t.equal(b.indexOf(0x0), -1)
+
+  // test offsets
+  t.equal(b.indexOf('d', 2), 3)
+  t.equal(b.indexOf('f', 5), 5)
+  t.equal(b.indexOf('f', -1), 5)
+  t.equal(b.indexOf('f', 6), -1)
+
+  t.equal(b.indexOf(Buffer.from('d'), 2), 3)
+  t.equal(b.indexOf(Buffer.from('f'), 5), 5)
+  t.equal(b.indexOf(Buffer.from('f'), -1), 5)
+  t.equal(b.indexOf(Buffer.from('f'), 6), -1)
+
+  t.equal(Buffer.from('ff').indexOf(Buffer.from('f'), 1, 'ucs2'), -1)
+
+  // test invalid and uppercase encoding
+  t.equal(b.indexOf('b', 'utf8'), 1)
+  t.equal(b.indexOf('b', 'UTF8'), 1)
+  t.equal(b.indexOf('62', 'HEX'), 1)
+  t.throws(() => b.indexOf('bad', 'enc'), TypeError)
+
+  // test hex encoding
+  t.equal(
+    Buffer.from(b.toString('hex'), 'hex')
+      .indexOf('64', 0, 'hex'),
+    3
+  )
+  t.equal(
+    Buffer.from(b.toString('hex'), 'hex')
+      .indexOf(Buffer.from('64', 'hex'), 0, 'hex'),
+    3
+  )
+
+  // test base64 encoding
+  t.equal(
+    Buffer.from(b.toString('base64'), 'base64')
+      .indexOf('ZA==', 0, 'base64'),
+    3
+  )
+  t.equal(
+    Buffer.from(b.toString('base64'), 'base64')
+      .indexOf(Buffer.from('ZA==', 'base64'), 0, 'base64'),
+    3
+  )
+
+  // test ascii encoding
+  t.equal(
+    Buffer.from(b.toString('ascii'), 'ascii')
+      .indexOf('d', 0, 'ascii'),
+    3
+  )
+  t.equal(
+    Buffer.from(b.toString('ascii'), 'ascii')
+      .indexOf(Buffer.from('d', 'ascii'), 0, 'ascii'),
+    3
+  )
+
+  // test optional offset with passed encoding
+  t.equal(Buffer.from('aaaa0').indexOf('30', 'hex'), 4)
+  t.equal(Buffer.from('aaaa00a').indexOf('3030', 'hex'), 4)
+
+  {
+    // test usc2 encoding
+    const twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2')
+
+    t.equal(8, twoByteString.indexOf('\u0395', 4, 'ucs2'))
+    t.equal(6, twoByteString.indexOf('\u03a3', -4, 'ucs2'))
+    t.equal(4, twoByteString.indexOf('\u03a3', -6, 'ucs2'))
+    t.equal(4, twoByteString.indexOf(
+      Buffer.from('\u03a3', 'ucs2'), -6, 'ucs2'))
+    t.equal(-1, twoByteString.indexOf('\u03a3', -2, 'ucs2'))
+  }
+
+  const mixedByteStringUcs2 =
+      Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395', 'ucs2')
+
+  t.equal(6, mixedByteStringUcs2.indexOf('bc', 0, 'ucs2'))
+  t.equal(10, mixedByteStringUcs2.indexOf('\u03a3', 0, 'ucs2'))
+  t.equal(-1, mixedByteStringUcs2.indexOf('\u0396', 0, 'ucs2'))
+
+  t.equal(
+    6, mixedByteStringUcs2.indexOf(Buffer.from('bc', 'ucs2'), 0, 'ucs2'))
+  t.equal(
+    10, mixedByteStringUcs2.indexOf(Buffer.from('\u03a3', 'ucs2'), 0, 'ucs2'))
+  t.equal(
+    -1, mixedByteStringUcs2.indexOf(Buffer.from('\u0396', 'ucs2'), 0, 'ucs2'))
+
+  {
+    const twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2')
+
+    // Test single char pattern
+    t.equal(0, twoByteString.indexOf('\u039a', 0, 'ucs2'))
+    let index = twoByteString.indexOf('\u0391', 0, 'ucs2')
+    t.equal(2, index, `Alpha - at index ${index}`)
+    index = twoByteString.indexOf('\u03a3', 0, 'ucs2')
+    t.equal(4, index, `First Sigma - at index ${index}`)
+    index = twoByteString.indexOf('\u03a3', 6, 'ucs2')
+    t.equal(6, index, `Second Sigma - at index ${index}`)
+    index = twoByteString.indexOf('\u0395', 0, 'ucs2')
+    t.equal(8, index, `Epsilon - at index ${index}`)
+    index = twoByteString.indexOf('\u0392', 0, 'ucs2')
+    t.equal(-1, index, `Not beta - at index ${index}`)
+
+    // Test multi-char pattern
+    index = twoByteString.indexOf('\u039a\u0391', 0, 'ucs2')
+    t.equal(0, index, `Lambda Alpha - at index ${index}`)
+    index = twoByteString.indexOf('\u0391\u03a3', 0, 'ucs2')
+    t.equal(2, index, `Alpha Sigma - at index ${index}`)
+    index = twoByteString.indexOf('\u03a3\u03a3', 0, 'ucs2')
+    t.equal(4, index, `Sigma Sigma - at index ${index}`)
+    index = twoByteString.indexOf('\u03a3\u0395', 0, 'ucs2')
+    t.equal(6, index, `Sigma Epsilon - at index ${index}`)
+  }
+
+  const mixedByteStringUtf8 = Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395')
+
+  t.equal(5, mixedByteStringUtf8.indexOf('bc'))
+  t.equal(5, mixedByteStringUtf8.indexOf('bc', 5))
+  t.equal(5, mixedByteStringUtf8.indexOf('bc', -8))
+  t.equal(7, mixedByteStringUtf8.indexOf('\u03a3'))
+  t.equal(-1, mixedByteStringUtf8.indexOf('\u0396'))
+
+  // Test complex string indexOf algorithms. Only trigger for long strings.
+  // Long string that isn't a simple repeat of a shorter string.
+  let longString = 'A'
+  for (let i = 66; i < 76; i++) { // from 'B' to 'K'
+    longString = longString + String.fromCharCode(i) + longString
+  }
+
+  const longBufferString = Buffer.from(longString)
+
+  // pattern of 15 chars, repeated every 16 chars in long
+  let pattern = 'ABACABADABACABA'
+  for (let i = 0; i < longBufferString.length - pattern.length; i += 7) {
+    const index = longBufferString.indexOf(pattern, i)
+    t.equal((i + 15) & ~0xf, index,
+      `Long ABACABA...-string at index ${i}`)
+  }
+
+  let index = longBufferString.indexOf('AJABACA')
+  t.equal(510, index, `Long AJABACA, First J - at index ${index}`)
+  index = longBufferString.indexOf('AJABACA', 511)
+  t.equal(1534, index, `Long AJABACA, Second J - at index ${index}`)
+
+  pattern = 'JABACABADABACABA'
+  index = longBufferString.indexOf(pattern)
+  t.equal(511, index, `Long JABACABA..., First J - at index ${index}`)
+  index = longBufferString.indexOf(pattern, 512)
+  t.equal(
+    1535, index, `Long JABACABA..., Second J - at index ${index}`)
+
+  // Search for a non-ASCII string in a pure ASCII string.
+  const asciiString = Buffer.from(
+    'somethingnotatallsinisterwhichalsoworks')
+  t.equal(-1, asciiString.indexOf('\x2061'))
+  t.equal(3, asciiString.indexOf('eth', 0))
+
+  // Search in string containing many non-ASCII chars.
+  const allCodePoints = []
+  for (let i = 0; i < 65536; i++) {
+    allCodePoints[i] = i
+  }
+
+  const allCharsString = String.fromCharCode.apply(String, allCodePoints)
+  const allCharsBufferUtf8 = Buffer.from(allCharsString)
+  const allCharsBufferUcs2 = Buffer.from(allCharsString, 'ucs2')
+
+  // Search for string long enough to trigger complex search with ASCII pattern
+  // and UC16 subject.
+  t.equal(-1, allCharsBufferUtf8.indexOf('notfound'))
+  t.equal(-1, allCharsBufferUcs2.indexOf('notfound'))
+
+  // Needle is longer than haystack, but only because it's encoded as UTF-16
+  t.equal(Buffer.from('aaaa').indexOf('a'.repeat(4), 'ucs2'), -1)
+
+  t.equal(Buffer.from('aaaa').indexOf('a'.repeat(4), 'utf8'), 0)
+  t.equal(Buffer.from('aaaa').indexOf('你好', 'ucs2'), -1)
+
+  // Haystack has odd length, but the needle is UCS2.
+  t.equal(Buffer.from('aaaaa').indexOf('b', 'ucs2'), -1)
+
+  {
+    // Find substrings in Utf8.
+    const lengths = [1, 3, 15] // Single char, simple and complex.
+    const indices = [0x5, 0x60, 0x400, 0x680, 0x7ee, 0xFF02, 0x16610, 0x2f77b]
+    for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
+      for (let i = 0; i < indices.length; i++) {
+        const index = indices[i]
+        let length = lengths[lengthIndex]
+
+        if (index + length > 0x7F) {
+          length = 2 * length
+        }
+
+        if (index + length > 0x7FF) {
+          length = 3 * length
+        }
+
+        if (index + length > 0xFFFF) {
+          length = 4 * length
+        }
+
+        const patternBufferUtf8 = allCharsBufferUtf8.slice(index, index + length)
+        t.equal(index, allCharsBufferUtf8.indexOf(patternBufferUtf8))
+
+        const patternStringUtf8 = patternBufferUtf8.toString()
+        t.equal(index, allCharsBufferUtf8.indexOf(patternStringUtf8))
+      }
+    }
+  }
+
+  {
+    // Find substrings in Usc2.
+    const lengths = [2, 4, 16] // Single char, simple and complex.
+    const indices = [0x5, 0x65, 0x105, 0x205, 0x285, 0x2005, 0x2085, 0xfff0]
+
+    for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
+      for (let i = 0; i < indices.length; i++) {
+        const index = indices[i] * 2
+        const length = lengths[lengthIndex]
+
+        const patternBufferUcs2 =
+            allCharsBufferUcs2.slice(index, index + length)
+        t.equal(
+          index, allCharsBufferUcs2.indexOf(patternBufferUcs2, 0, 'ucs2'))
+
+        const patternStringUcs2 = patternBufferUcs2.toString('ucs2')
+        t.equal(
+          index, allCharsBufferUcs2.indexOf(patternStringUcs2, 0, 'ucs2'))
+      }
+    }
+  }
+
+  [
+    () => {},
+    {},
+    []
+  ].forEach((val) => {
+    t.throws(() => b.indexOf(val), TypeError, `"${JSON.stringify(val)}" should throw`)
+  })
+
+  // Test weird offset arguments.
+  // The following offsets coerce to NaN or 0, searching the whole Buffer
+  t.equal(b.indexOf('b', undefined), 1)
+  t.equal(b.indexOf('b', {}), 1)
+  t.equal(b.indexOf('b', 0), 1)
+  t.equal(b.indexOf('b', null), 1)
+  t.equal(b.indexOf('b', []), 1)
+
+  // The following offset coerces to 2, in other words +[2] === 2
+  t.equal(b.indexOf('b', [2]), -1)
+
+  // Behavior should match String.indexOf()
+  t.equal(
+    b.indexOf('b', undefined),
+    stringComparison.indexOf('b', undefined))
+  t.equal(
+    b.indexOf('b', {}),
+    stringComparison.indexOf('b', {}))
+  t.equal(
+    b.indexOf('b', 0),
+    stringComparison.indexOf('b', 0))
+  t.equal(
+    b.indexOf('b', null),
+    stringComparison.indexOf('b', null))
+  t.equal(
+    b.indexOf('b', []),
+    stringComparison.indexOf('b', []))
+  t.equal(
+    b.indexOf('b', [2]),
+    stringComparison.indexOf('b', [2]))
+
+  // test truncation of Number arguments to uint8
+  {
+    const buf = Buffer.from('this is a test')
+
+    t.equal(buf.indexOf(0x6973), 3)
+    t.equal(buf.indexOf(0x697320), 4)
+    t.equal(buf.indexOf(0x69732069), 2)
+    t.equal(buf.indexOf(0x697374657374), 0)
+    t.equal(buf.indexOf(0x69737374), 0)
+    t.equal(buf.indexOf(0x69737465), 11)
+    t.equal(buf.indexOf(0x69737465), 11)
+    t.equal(buf.indexOf(-140), 0)
+    t.equal(buf.indexOf(-152), 1)
+    t.equal(buf.indexOf(0xff), -1)
+    t.equal(buf.indexOf(0xffff), -1)
+  }
+
+  // Test that Uint8Array arguments are okay.
+  {
+    const needle = new Uint8Array([0x66, 0x6f, 0x6f])
+    const haystack = new BufferList(Buffer.from('a foo b foo'))
+    t.equal(haystack.indexOf(needle), 2)
+  }
+
+  t.end()
+})
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/isBufferList.js b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/isBufferList.js
new file mode 100644
index 0000000..9d895d5
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/isBufferList.js
@@ -0,0 +1,32 @@
+'use strict'
+
+const tape = require('tape')
+const { BufferList, BufferListStream } = require('../')
+const { Buffer } = require('buffer')
+
+tape('isBufferList positives', (t) => {
+  t.ok(BufferList.isBufferList(new BufferList()))
+  t.ok(BufferList.isBufferList(new BufferListStream()))
+
+  t.end()
+})
+
+tape('isBufferList negatives', (t) => {
+  const types = [
+    null,
+    undefined,
+    NaN,
+    true,
+    false,
+    {},
+    [],
+    Buffer.alloc(0),
+    [Buffer.alloc(0)]
+  ]
+
+  for (const obj of types) {
+    t.notOk(BufferList.isBufferList(obj))
+  }
+
+  t.end()
+})
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/test.js b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/test.js
new file mode 100644
index 0000000..e523d0c
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/bl/test/test.js
@@ -0,0 +1,869 @@
+'use strict'
+
+const tape = require('tape')
+const crypto = require('crypto')
+const fs = require('fs')
+const path = require('path')
+const BufferList = require('../')
+const { Buffer } = require('buffer')
+
+const encodings =
+      ('hex utf8 utf-8 ascii binary base64' +
+          (process.browser ? '' : ' ucs2 ucs-2 utf16le utf-16le')).split(' ')
+
+require('./indexOf')
+require('./isBufferList')
+require('./convert')
+
+tape('single bytes from single buffer', function (t) {
+  const bl = new BufferList()
+
+  bl.append(Buffer.from('abcd'))
+
+  t.equal(bl.length, 4)
+  t.equal(bl.get(-1), undefined)
+  t.equal(bl.get(0), 97)
+  t.equal(bl.get(1), 98)
+  t.equal(bl.get(2), 99)
+  t.equal(bl.get(3), 100)
+  t.equal(bl.get(4), undefined)
+
+  t.end()
+})
+
+tape('single bytes from multiple buffers', function (t) {
+  const bl = new BufferList()
+
+  bl.append(Buffer.from('abcd'))
+  bl.append(Buffer.from('efg'))
+  bl.append(Buffer.from('hi'))
+  bl.append(Buffer.from('j'))
+
+  t.equal(bl.length, 10)
+
+  t.equal(bl.get(0), 97)
+  t.equal(bl.get(1), 98)
+  t.equal(bl.get(2), 99)
+  t.equal(bl.get(3), 100)
+  t.equal(bl.get(4), 101)
+  t.equal(bl.get(5), 102)
+  t.equal(bl.get(6), 103)
+  t.equal(bl.get(7), 104)
+  t.equal(bl.get(8), 105)
+  t.equal(bl.get(9), 106)
+
+  t.end()
+})
+
+tape('multi bytes from single buffer', function (t) {
+  const bl = new BufferList()
+
+  bl.append(Buffer.from('abcd'))
+
+  t.equal(bl.length, 4)
+
+  t.equal(bl.slice(0, 4).toString('ascii'), 'abcd')
+  t.equal(bl.slice(0, 3).toString('ascii'), 'abc')
+  t.equal(bl.slice(1, 4).toString('ascii'), 'bcd')
+  t.equal(bl.slice(-4, -1).toString('ascii'), 'abc')
+
+  t.end()
+})
+
+tape('multi bytes from single buffer (negative indexes)', function (t) {
+  const bl = new BufferList()
+
+  bl.append(Buffer.from('buffer'))
+
+  t.equal(bl.length, 6)
+
+  t.equal(bl.slice(-6, -1).toString('ascii'), 'buffe')
+  t.equal(bl.slice(-6, -2).toString('ascii'), 'buff')
+  t.equal(bl.slice(-5, -2).toString('ascii'), 'uff')
+
+  t.end()
+})
+
+tape('multiple bytes from multiple buffers', function (t) {
+  const bl = new BufferList()
+
+  bl.append(Buffer.from('abcd'))
+  bl.append(Buffer.from('efg'))
+  bl.append(Buffer.from('hi'))
+  bl.append(Buffer.from('j'))
+
+  t.equal(bl.length, 10)
+
+  t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+  t.equal(bl.slice(3, 10).toString('ascii'), 'defghij')
+  t.equal(bl.slice(3, 6).toString('ascii'), 'def')
+  t.equal(bl.slice(3, 8).toString('ascii'), 'defgh')
+  t.equal(bl.slice(5, 10).toString('ascii'), 'fghij')
+  t.equal(bl.slice(-7, -4).toString('ascii'), 'def')
+
+  t.end()
+})
+
+tape('multiple bytes from multiple buffer lists', function (t) {
+  const bl = new BufferList()
+
+  bl.append(new BufferList([Buffer.from('abcd'), Buffer.from('efg')]))
+  bl.append(new BufferList([Buffer.from('hi'), Buffer.from('j')]))
+
+  t.equal(bl.length, 10)
+
+  t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+
+  t.equal(bl.slice(3, 10).toString('ascii'), 'defghij')
+  t.equal(bl.slice(3, 6).toString('ascii'), 'def')
+  t.equal(bl.slice(3, 8).toString('ascii'), 'defgh')
+  t.equal(bl.slice(5, 10).toString('ascii'), 'fghij')
+
+  t.end()
+})
+
+// same data as previous test, just using nested constructors
+tape('multiple bytes from crazy nested buffer lists', function (t) {
+  const bl = new BufferList()
+
+  bl.append(new BufferList([
+    new BufferList([
+      new BufferList(Buffer.from('abc')),
+      Buffer.from('d'),
+      new BufferList(Buffer.from('efg'))
+    ]),
+    new BufferList([Buffer.from('hi')]),
+    new BufferList(Buffer.from('j'))
+  ]))
+
+  t.equal(bl.length, 10)
+
+  t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+
+  t.equal(bl.slice(3, 10).toString('ascii'), 'defghij')
+  t.equal(bl.slice(3, 6).toString('ascii'), 'def')
+  t.equal(bl.slice(3, 8).toString('ascii'), 'defgh')
+  t.equal(bl.slice(5, 10).toString('ascii'), 'fghij')
+
+  t.end()
+})
+
+tape('append accepts arrays of Buffers', function (t) {
+  const bl = new BufferList()
+
+  bl.append(Buffer.from('abc'))
+  bl.append([Buffer.from('def')])
+  bl.append([Buffer.from('ghi'), Buffer.from('jkl')])
+  bl.append([Buffer.from('mnop'), Buffer.from('qrstu'), Buffer.from('vwxyz')])
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+  t.end()
+})
+
+tape('append accepts arrays of Uint8Arrays', function (t) {
+  const bl = new BufferList()
+
+  bl.append(new Uint8Array([97, 98, 99]))
+  bl.append([Uint8Array.from([100, 101, 102])])
+  bl.append([new Uint8Array([103, 104, 105]), new Uint8Array([106, 107, 108])])
+  bl.append([new Uint8Array([109, 110, 111, 112]), new Uint8Array([113, 114, 115, 116, 117]), new Uint8Array([118, 119, 120, 121, 122])])
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+  t.end()
+})
+
+tape('append accepts arrays of BufferLists', function (t) {
+  const bl = new BufferList()
+
+  bl.append(Buffer.from('abc'))
+  bl.append([new BufferList('def')])
+  bl.append(new BufferList([Buffer.from('ghi'), new BufferList('jkl')]))
+  bl.append([Buffer.from('mnop'), new BufferList([Buffer.from('qrstu'), Buffer.from('vwxyz')])])
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+  t.end()
+})
+
+tape('append chainable', function (t) {
+  const bl = new BufferList()
+
+  t.ok(bl.append(Buffer.from('abcd')) === bl)
+  t.ok(bl.append([Buffer.from('abcd')]) === bl)
+  t.ok(bl.append(new BufferList(Buffer.from('abcd'))) === bl)
+  t.ok(bl.append([new BufferList(Buffer.from('abcd'))]) === bl)
+
+  t.end()
+})
+
+tape('append chainable (test results)', function (t) {
+  const bl = new BufferList('abc')
+    .append([new BufferList('def')])
+    .append(new BufferList([Buffer.from('ghi'), new BufferList('jkl')]))
+    .append([Buffer.from('mnop'), new BufferList([Buffer.from('qrstu'), Buffer.from('vwxyz')])])
+
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+  t.end()
+})
+
+tape('consuming from multiple buffers', function (t) {
+  const bl = new BufferList()
+
+  bl.append(Buffer.from('abcd'))
+  bl.append(Buffer.from('efg'))
+  bl.append(Buffer.from('hi'))
+  bl.append(Buffer.from('j'))
+
+  t.equal(bl.length, 10)
+
+  t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+
+  bl.consume(3)
+  t.equal(bl.length, 7)
+  t.equal(bl.slice(0, 7).toString('ascii'), 'defghij')
+
+  bl.consume(2)
+  t.equal(bl.length, 5)
+  t.equal(bl.slice(0, 5).toString('ascii'), 'fghij')
+
+  bl.consume(1)
+  t.equal(bl.length, 4)
+  t.equal(bl.slice(0, 4).toString('ascii'), 'ghij')
+
+  bl.consume(1)
+  t.equal(bl.length, 3)
+  t.equal(bl.slice(0, 3).toString('ascii'), 'hij')
+
+  bl.consume(2)
+  t.equal(bl.length, 1)
+  t.equal(bl.slice(0, 1).toString('ascii'), 'j')
+
+  t.end()
+})
+
+tape('complete consumption', function (t) {
+  const bl = new BufferList()
+
+  bl.append(Buffer.from('a'))
+  bl.append(Buffer.from('b'))
+
+  bl.consume(2)
+
+  t.equal(bl.length, 0)
+  t.equal(bl._bufs.length, 0)
+
+  t.end()
+})
+
+tape('test readUInt8 / readInt8', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(3)
+  const bl = new BufferList()
+
+  buf1[0] = 0x1
+  buf2[1] = 0x3
+  buf2[2] = 0x4
+  buf3[0] = 0x23
+  buf3[1] = 0x42
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  t.equal(bl.readUInt8(), 0x1)
+  t.equal(bl.readUInt8(2), 0x3)
+  t.equal(bl.readInt8(2), 0x3)
+  t.equal(bl.readUInt8(3), 0x4)
+  t.equal(bl.readInt8(3), 0x4)
+  t.equal(bl.readUInt8(4), 0x23)
+  t.equal(bl.readInt8(4), 0x23)
+  t.equal(bl.readUInt8(5), 0x42)
+  t.equal(bl.readInt8(5), 0x42)
+
+  t.end()
+})
+
+tape('test readUInt16LE / readUInt16BE / readInt16LE / readInt16BE', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(3)
+  const bl = new BufferList()
+
+  buf1[0] = 0x1
+  buf2[1] = 0x3
+  buf2[2] = 0x4
+  buf3[0] = 0x23
+  buf3[1] = 0x42
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  t.equal(bl.readUInt16BE(), 0x0100)
+  t.equal(bl.readUInt16LE(), 0x0001)
+  t.equal(bl.readUInt16BE(2), 0x0304)
+  t.equal(bl.readUInt16LE(2), 0x0403)
+  t.equal(bl.readInt16BE(2), 0x0304)
+  t.equal(bl.readInt16LE(2), 0x0403)
+  t.equal(bl.readUInt16BE(3), 0x0423)
+  t.equal(bl.readUInt16LE(3), 0x2304)
+  t.equal(bl.readInt16BE(3), 0x0423)
+  t.equal(bl.readInt16LE(3), 0x2304)
+  t.equal(bl.readUInt16BE(4), 0x2342)
+  t.equal(bl.readUInt16LE(4), 0x4223)
+  t.equal(bl.readInt16BE(4), 0x2342)
+  t.equal(bl.readInt16LE(4), 0x4223)
+
+  t.end()
+})
+
+tape('test readUInt32LE / readUInt32BE / readInt32LE / readInt32BE', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(3)
+  const bl = new BufferList()
+
+  buf1[0] = 0x1
+  buf2[1] = 0x3
+  buf2[2] = 0x4
+  buf3[0] = 0x23
+  buf3[1] = 0x42
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  t.equal(bl.readUInt32BE(), 0x01000304)
+  t.equal(bl.readUInt32LE(), 0x04030001)
+  t.equal(bl.readUInt32BE(2), 0x03042342)
+  t.equal(bl.readUInt32LE(2), 0x42230403)
+  t.equal(bl.readInt32BE(2), 0x03042342)
+  t.equal(bl.readInt32LE(2), 0x42230403)
+
+  t.end()
+})
+
+tape('test readUIntLE / readUIntBE / readIntLE / readIntBE', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(3)
+  const bl = new BufferList()
+
+  buf2[0] = 0x2
+  buf2[1] = 0x3
+  buf2[2] = 0x4
+  buf3[0] = 0x23
+  buf3[1] = 0x42
+  buf3[2] = 0x61
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  t.equal(bl.readUIntBE(1, 1), 0x02)
+  t.equal(bl.readUIntBE(1, 2), 0x0203)
+  t.equal(bl.readUIntBE(1, 3), 0x020304)
+  t.equal(bl.readUIntBE(1, 4), 0x02030423)
+  t.equal(bl.readUIntBE(1, 5), 0x0203042342)
+  t.equal(bl.readUIntBE(1, 6), 0x020304234261)
+  t.equal(bl.readUIntLE(1, 1), 0x02)
+  t.equal(bl.readUIntLE(1, 2), 0x0302)
+  t.equal(bl.readUIntLE(1, 3), 0x040302)
+  t.equal(bl.readUIntLE(1, 4), 0x23040302)
+  t.equal(bl.readUIntLE(1, 5), 0x4223040302)
+  t.equal(bl.readUIntLE(1, 6), 0x614223040302)
+  t.equal(bl.readIntBE(1, 1), 0x02)
+  t.equal(bl.readIntBE(1, 2), 0x0203)
+  t.equal(bl.readIntBE(1, 3), 0x020304)
+  t.equal(bl.readIntBE(1, 4), 0x02030423)
+  t.equal(bl.readIntBE(1, 5), 0x0203042342)
+  t.equal(bl.readIntBE(1, 6), 0x020304234261)
+  t.equal(bl.readIntLE(1, 1), 0x02)
+  t.equal(bl.readIntLE(1, 2), 0x0302)
+  t.equal(bl.readIntLE(1, 3), 0x040302)
+  t.equal(bl.readIntLE(1, 4), 0x23040302)
+  t.equal(bl.readIntLE(1, 5), 0x4223040302)
+  t.equal(bl.readIntLE(1, 6), 0x614223040302)
+
+  t.end()
+})
+
+tape('test readFloatLE / readFloatBE', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(3)
+  const bl = new BufferList()
+
+  buf1[0] = 0x01
+  buf2[1] = 0x00
+  buf2[2] = 0x00
+  buf3[0] = 0x80
+  buf3[1] = 0x3f
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  const canonical = Buffer.concat([buf1, buf2, buf3])
+  t.equal(bl.readFloatLE(), canonical.readFloatLE())
+  t.equal(bl.readFloatBE(), canonical.readFloatBE())
+  t.equal(bl.readFloatLE(2), canonical.readFloatLE(2))
+  t.equal(bl.readFloatBE(2), canonical.readFloatBE(2))
+
+  t.end()
+})
+
+tape('test readDoubleLE / readDoubleBE', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(10)
+  const bl = new BufferList()
+
+  buf1[0] = 0x01
+  buf2[1] = 0x55
+  buf2[2] = 0x55
+  buf3[0] = 0x55
+  buf3[1] = 0x55
+  buf3[2] = 0x55
+  buf3[3] = 0x55
+  buf3[4] = 0xd5
+  buf3[5] = 0x3f
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  const canonical = Buffer.concat([buf1, buf2, buf3])
+  t.equal(bl.readDoubleBE(), canonical.readDoubleBE())
+  t.equal(bl.readDoubleLE(), canonical.readDoubleLE())
+  t.equal(bl.readDoubleBE(2), canonical.readDoubleBE(2))
+  t.equal(bl.readDoubleLE(2), canonical.readDoubleLE(2))
+
+  t.end()
+})
+
+tape('test toString', function (t) {
+  const bl = new BufferList()
+
+  bl.append(Buffer.from('abcd'))
+  bl.append(Buffer.from('efg'))
+  bl.append(Buffer.from('hi'))
+  bl.append(Buffer.from('j'))
+
+  t.equal(bl.toString('ascii', 0, 10), 'abcdefghij')
+  t.equal(bl.toString('ascii', 3, 10), 'defghij')
+  t.equal(bl.toString('ascii', 3, 6), 'def')
+  t.equal(bl.toString('ascii', 3, 8), 'defgh')
+  t.equal(bl.toString('ascii', 5, 10), 'fghij')
+
+  t.end()
+})
+
+tape('test toString encoding', function (t) {
+  const bl = new BufferList()
+  const b = Buffer.from('abcdefghij\xff\x00')
+
+  bl.append(Buffer.from('abcd'))
+  bl.append(Buffer.from('efg'))
+  bl.append(Buffer.from('hi'))
+  bl.append(Buffer.from('j'))
+  bl.append(Buffer.from('\xff\x00'))
+
+  encodings.forEach(function (enc) {
+    t.equal(bl.toString(enc), b.toString(enc), enc)
+  })
+
+  t.end()
+})
+
+tape('uninitialized memory', function (t) {
+  const secret = crypto.randomBytes(256)
+  for (let i = 0; i < 1e6; i++) {
+    const clone = Buffer.from(secret)
+    const bl = new BufferList()
+    bl.append(Buffer.from('a'))
+    bl.consume(-1024)
+    const buf = bl.slice(1)
+    if (buf.indexOf(clone) !== -1) {
+      t.fail(`Match (at ${i})`)
+      break
+    }
+  }
+  t.end()
+})
+
+!process.browser && tape('test stream', function (t) {
+  const random = crypto.randomBytes(65534)
+
+  const bl = new BufferList((err, buf) => {
+    t.ok(Buffer.isBuffer(buf))
+    t.ok(err === null)
+    t.ok(random.equals(bl.slice()))
+    t.ok(random.equals(buf.slice()))
+
+    bl.pipe(fs.createWriteStream('/tmp/bl_test_rnd_out.dat'))
+      .on('close', function () {
+        const rndhash = crypto.createHash('md5').update(random).digest('hex')
+        const md5sum = crypto.createHash('md5')
+        const s = fs.createReadStream('/tmp/bl_test_rnd_out.dat')
+
+        s.on('data', md5sum.update.bind(md5sum))
+        s.on('end', function () {
+          t.equal(rndhash, md5sum.digest('hex'), 'woohoo! correct hash!')
+          t.end()
+        })
+      })
+  })
+
+  fs.writeFileSync('/tmp/bl_test_rnd.dat', random)
+  fs.createReadStream('/tmp/bl_test_rnd.dat').pipe(bl)
+})
+
+tape('instantiation with Buffer', function (t) {
+  const buf = crypto.randomBytes(1024)
+  const buf2 = crypto.randomBytes(1024)
+  let b = BufferList(buf)
+
+  t.equal(buf.toString('hex'), b.slice().toString('hex'), 'same buffer')
+  b = BufferList([buf, buf2])
+  t.equal(b.slice().toString('hex'), Buffer.concat([buf, buf2]).toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('test String appendage', function (t) {
+  const bl = new BufferList()
+  const b = Buffer.from('abcdefghij\xff\x00')
+
+  bl.append('abcd')
+  bl.append('efg')
+  bl.append('hi')
+  bl.append('j')
+  bl.append('\xff\x00')
+
+  encodings.forEach(function (enc) {
+    t.equal(bl.toString(enc), b.toString(enc))
+  })
+
+  t.end()
+})
+
+tape('test Number appendage', function (t) {
+  const bl = new BufferList()
+  const b = Buffer.from('1234567890')
+
+  bl.append(1234)
+  bl.append(567)
+  bl.append(89)
+  bl.append(0)
+
+  encodings.forEach(function (enc) {
+    t.equal(bl.toString(enc), b.toString(enc))
+  })
+
+  t.end()
+})
+
+tape('write nothing, should get empty buffer', function (t) {
+  t.plan(3)
+  BufferList(function (err, data) {
+    t.notOk(err, 'no error')
+    t.ok(Buffer.isBuffer(data), 'got a buffer')
+    t.equal(0, data.length, 'got a zero-length buffer')
+    t.end()
+  }).end()
+})
+
+tape('unicode string', function (t) {
+  t.plan(2)
+
+  const inp1 = '\u2600'
+  const inp2 = '\u2603'
+  const exp = inp1 + ' and ' + inp2
+  const bl = BufferList()
+
+  bl.write(inp1)
+  bl.write(' and ')
+  bl.write(inp2)
+  t.equal(exp, bl.toString())
+  t.equal(Buffer.from(exp).toString('hex'), bl.toString('hex'))
+})
+
+tape('should emit finish', function (t) {
+  const source = BufferList()
+  const dest = BufferList()
+
+  source.write('hello')
+  source.pipe(dest)
+
+  dest.on('finish', function () {
+    t.equal(dest.toString('utf8'), 'hello')
+    t.end()
+  })
+})
+
+tape('basic copy', function (t) {
+  const buf = crypto.randomBytes(1024)
+  const buf2 = Buffer.alloc(1024)
+  const b = BufferList(buf)
+
+  b.copy(buf2)
+  t.equal(b.slice().toString('hex'), buf2.toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('copy after many appends', function (t) {
+  const buf = crypto.randomBytes(512)
+  const buf2 = Buffer.alloc(1024)
+  const b = BufferList(buf)
+
+  b.append(buf)
+  b.copy(buf2)
+  t.equal(b.slice().toString('hex'), buf2.toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('copy at a precise position', function (t) {
+  const buf = crypto.randomBytes(1004)
+  const buf2 = Buffer.alloc(1024)
+  const b = BufferList(buf)
+
+  b.copy(buf2, 20)
+  t.equal(b.slice().toString('hex'), buf2.slice(20).toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('copy starting from a precise location', function (t) {
+  const buf = crypto.randomBytes(10)
+  const buf2 = Buffer.alloc(5)
+  const b = BufferList(buf)
+
+  b.copy(buf2, 0, 5)
+  t.equal(b.slice(5).toString('hex'), buf2.toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('copy in an interval', function (t) {
+  const rnd = crypto.randomBytes(10)
+  const b = BufferList(rnd) // put the random bytes there
+  const actual = Buffer.alloc(3)
+  const expected = Buffer.alloc(3)
+
+  rnd.copy(expected, 0, 5, 8)
+  b.copy(actual, 0, 5, 8)
+
+  t.equal(actual.toString('hex'), expected.toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('copy an interval between two buffers', function (t) {
+  const buf = crypto.randomBytes(10)
+  const buf2 = Buffer.alloc(10)
+  const b = BufferList(buf)
+
+  b.append(buf)
+  b.copy(buf2, 0, 5, 15)
+
+  t.equal(b.slice(5, 15).toString('hex'), buf2.toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('shallow slice across buffer boundaries', function (t) {
+  const bl = new BufferList(['First', 'Second', 'Third'])
+
+  t.equal(bl.shallowSlice(3, 13).toString(), 'stSecondTh')
+
+  t.end()
+})
+
+tape('shallow slice within single buffer', function (t) {
+  t.plan(2)
+
+  const bl = new BufferList(['First', 'Second', 'Third'])
+
+  t.equal(bl.shallowSlice(5, 10).toString(), 'Secon')
+  t.equal(bl.shallowSlice(7, 10).toString(), 'con')
+
+  t.end()
+})
+
+tape('shallow slice single buffer', function (t) {
+  t.plan(3)
+
+  const bl = new BufferList(['First', 'Second', 'Third'])
+
+  t.equal(bl.shallowSlice(0, 5).toString(), 'First')
+  t.equal(bl.shallowSlice(5, 11).toString(), 'Second')
+  t.equal(bl.shallowSlice(11, 16).toString(), 'Third')
+})
+
+tape('shallow slice with negative or omitted indices', function (t) {
+  t.plan(4)
+
+  const bl = new BufferList(['First', 'Second', 'Third'])
+
+  t.equal(bl.shallowSlice().toString(), 'FirstSecondThird')
+  t.equal(bl.shallowSlice(5).toString(), 'SecondThird')
+  t.equal(bl.shallowSlice(5, -3).toString(), 'SecondTh')
+  t.equal(bl.shallowSlice(-8).toString(), 'ondThird')
+})
+
+tape('shallow slice does not make a copy', function (t) {
+  t.plan(1)
+
+  const buffers = [Buffer.from('First'), Buffer.from('Second'), Buffer.from('Third')]
+  const bl = (new BufferList(buffers)).shallowSlice(5, -3)
+
+  buffers[1].fill('h')
+  buffers[2].fill('h')
+
+  t.equal(bl.toString(), 'hhhhhhhh')
+})
+
+tape('shallow slice with 0 length', function (t) {
+  t.plan(1)
+
+  const buffers = [Buffer.from('First'), Buffer.from('Second'), Buffer.from('Third')]
+  const bl = (new BufferList(buffers)).shallowSlice(0, 0)
+
+  t.equal(bl.length, 0)
+})
+
+tape('shallow slice with 0 length from middle', function (t) {
+  t.plan(1)
+
+  const buffers = [Buffer.from('First'), Buffer.from('Second'), Buffer.from('Third')]
+  const bl = (new BufferList(buffers)).shallowSlice(10, 10)
+
+  t.equal(bl.length, 0)
+})
+
+tape('duplicate', function (t) {
+  t.plan(2)
+
+  const bl = new BufferList('abcdefghij\xff\x00')
+  const dup = bl.duplicate()
+
+  t.equal(bl.prototype, dup.prototype)
+  t.equal(bl.toString('hex'), dup.toString('hex'))
+})
+
+tape('destroy no pipe', function (t) {
+  t.plan(2)
+
+  const bl = new BufferList('alsdkfja;lsdkfja;lsdk')
+
+  bl.destroy()
+
+  t.equal(bl._bufs.length, 0)
+  t.equal(bl.length, 0)
+})
+
+tape('destroy with error', function (t) {
+  t.plan(3)
+
+  const bl = new BufferList('alsdkfja;lsdkfja;lsdk')
+  const err = new Error('kaboom')
+
+  bl.destroy(err)
+  bl.on('error', function (_err) {
+    t.equal(_err, err)
+  })
+
+  t.equal(bl._bufs.length, 0)
+  t.equal(bl.length, 0)
+})
+
+!process.browser && tape('destroy with pipe before read end', function (t) {
+  t.plan(2)
+
+  const bl = new BufferList()
+  fs.createReadStream(path.join(__dirname, '/test.js'))
+    .pipe(bl)
+
+  bl.destroy()
+
+  t.equal(bl._bufs.length, 0)
+  t.equal(bl.length, 0)
+})
+
+!process.browser && tape('destroy with pipe before read end with race', function (t) {
+  t.plan(2)
+
+  const bl = new BufferList()
+
+  fs.createReadStream(path.join(__dirname, '/test.js'))
+    .pipe(bl)
+
+  setTimeout(function () {
+    bl.destroy()
+    setTimeout(function () {
+      t.equal(bl._bufs.length, 0)
+      t.equal(bl.length, 0)
+    }, 500)
+  }, 500)
+})
+
+!process.browser && tape('destroy with pipe after read end', function (t) {
+  t.plan(2)
+
+  const bl = new BufferList()
+
+  fs.createReadStream(path.join(__dirname, '/test.js'))
+    .on('end', onEnd)
+    .pipe(bl)
+
+  function onEnd () {
+    bl.destroy()
+
+    t.equal(bl._bufs.length, 0)
+    t.equal(bl.length, 0)
+  }
+})
+
+!process.browser && tape('destroy with pipe while writing to a destination', function (t) {
+  t.plan(4)
+
+  const bl = new BufferList()
+  const ds = new BufferList()
+
+  fs.createReadStream(path.join(__dirname, '/test.js'))
+    .on('end', onEnd)
+    .pipe(bl)
+
+  function onEnd () {
+    bl.pipe(ds)
+
+    setTimeout(function () {
+      bl.destroy()
+
+      t.equals(bl._bufs.length, 0)
+      t.equals(bl.length, 0)
+
+      ds.destroy()
+
+      t.equals(bl._bufs.length, 0)
+      t.equals(bl.length, 0)
+    }, 100)
+  }
+})
+
+!process.browser && tape('handle error', function (t) {
+  t.plan(2)
+
+  fs.createReadStream('/does/not/exist').pipe(BufferList(function (err, data) {
+    t.ok(err instanceof Error, 'has error')
+    t.notOk(data, 'no data')
+  }))
+})
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/.github/workflows/ci.yml b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/.github/workflows/ci.yml
new file mode 100644
index 0000000..5ae70cb
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/.github/workflows/ci.yml
@@ -0,0 +1,27 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [12.x, 14.x, 16.x]
+
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Run tests
+        run: |
+          npm run ci
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/CONTRIBUTING.md b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/CONTRIBUTING.md
new file mode 100644
index 0000000..cbe1f77
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/CONTRIBUTING.md
@@ -0,0 +1,27 @@
+# mqtt-packet is an OPEN Open Source Project
+
+-----------------------------------------
+
+## What?
+
+Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.
+
+## Rules
+
+There are a few basic ground-rules for contributors:
+
+1. **No `--force` pushes** or modifying the Git history in any way.
+1. **Non-master branches** ought to be used for ongoing work.
+1. **External API changes and significant modifications** ought to be subject to an **internal pull-request** to solicit feedback from other contributors.
+1. Internal pull-requests to solicit feedback are *encouraged* for any other non-trivial contribution but left to the discretion of the contributor.
+1. Contributors should attempt to adhere to the prevailing code-style.
+
+## Releases
+
+Declaring formal releases remains the prerogative of the project maintainer.
+
+## Changes to this arrangement
+
+This is an experiment and feedback is welcome! This document may also be subject to pull-requests or changes by contributors where you believe you have something valuable to add or change.
+
+-----------------------------------------
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/LICENSE.md b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/LICENSE.md
new file mode 100644
index 0000000..833b757
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/LICENSE.md
@@ -0,0 +1,13 @@
+The MIT License (MIT)
+=====================
+
+Copyright (c) 2014-2017 mqtt-packet contributors
+---------------------------------------
+
+*mqtt-packet contributors listed at <https://github.com/mqttjs/mqtt-packet#contributors>*
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/README.md b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/README.md
new file mode 100644
index 0000000..72a0356
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/README.md
@@ -0,0 +1,491 @@
+mqtt-packet
+===========
+
+Encode and Decode MQTT 3.1.1, 5.0 packets the node way.
+
+[![JavaScript Style Guide](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard)
+
+  * <a href="#installation">Installation</a>
+  * <a href="#examples">Examples</a>
+  * <a href="#packets">Packets</a>
+  * <a href="#api">API</a>
+  * <a href="#contributing">Contributing</a>
+  * <a href="#license">License &amp; copyright</a>
+
+This library is tested with node v6, v8, v10, v12 and v14. The last version to support
+older versions of node was mqtt-packet@4.1.2.
+
+Installation
+------------
+
+```bash
+npm install mqtt-packet --save
+```
+
+Examples
+--------
+
+### Generating
+
+```js
+const mqtt = require('mqtt-packet');
+const object = {
+  cmd: 'publish',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 10,
+  topic: 'test',
+  payload: 'test' // Can also be a Buffer
+};
+const opts = { protocolVersion: 4 }; // default is 4. Usually, opts is a connect packet
+
+console.log(mqtt.generate(object))
+// Prints:
+//
+// <Buffer 30 0a 00 04 74 65 73 74 74 65 73 74>
+//
+// Which is the same as:
+//
+// Buffer.from([
+//   48, 10, // Header (publish)
+//   0, 4, // Topic length
+//   116, 101, 115, 116, // Topic (test)
+//   116, 101, 115, 116 // Payload (test)
+// ])
+```
+
+### Parsing
+
+```js
+const mqtt = require('mqtt-packet');
+const opts = { protocolVersion: 4 }; // default is 4. Usually, opts is a connect packet
+const parser = mqtt.parser(opts);
+
+// Synchronously emits all the parsed packets
+parser.on('packet', packet => {
+  console.log(packet)
+  // Prints:
+  //
+  // {
+  //   cmd: 'publish',
+  //   retain: false,
+  //   qos: 0,
+  //   dup: false,
+  //   length: 10,
+  //   topic: 'test',
+  //   payload: <Buffer 74 65 73 74>
+  // }
+})
+
+parser.parse(Buffer.from([
+  48, 10, // Header (publish)
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  116, 101, 115, 116 // Payload (test)
+]))
+// Returns the number of bytes left in the parser
+```
+
+API
+---
+
+  * <a href="#generate"><code>mqtt#<b>generate()</b></code></a>
+  * <a href="#writeToStream"><code>mqtt#<b>writeToStream()</b></code></a>
+  * <a href="#parser"><code>mqtt#<b>parser()</b></code></a>
+
+<a name="generate">
+
+### mqtt.generate(object, [opts])
+
+Generates a `Buffer` containing an MQTT packet.
+The object must be one of the ones specified by the [packets](#packets)
+section. Throws an `Error` if a packet cannot be generated.
+
+<a name="writeToStream">
+
+### mqtt.writeToStream(object, stream, [opts])
+
+Writes the mqtt packet defined by `object` to the given stream.
+The object must be one of the ones specified by the [packets](#packets)
+section. Emits an `Error` on the stream if a packet cannot be generated.
+On node >= 0.12, this function automatically calls `cork()` on your stream,
+and then it calls `uncork()` on the next tick.
+By default cache for number buffers is enabled.
+It creates a list of buffers for faster write. To disable cache set `mqtt.writeToStream.cacheNumbers = false`.
+Should be set before any `writeToStream` calls.
+
+<a name="parser">
+
+### mqtt.parser([opts])
+
+Returns a new `Parser` object. `Parser` inherits from `EventEmitter` and
+will emit:
+
+  * `packet`, when a new packet is parsed, according to
+    [packets](#packets)
+  * `error`, if an error happens
+
+<a name="parse">
+
+#### Parser.parse(buffer)
+
+Parses a given `Buffer` and emits synchronously all the MQTT packets that
+are included. Returns the number of bytes left to parse.
+
+If an error happens, an `error` event will be emitted, but no `packet` events
+will be emitted after that. Calling `parse()` again clears the error and
+previous buffer, as if you created a new `Parser`.
+
+Packets
+-------
+
+This section describes the format of all packets emitted by the `Parser`
+and that you can input to `generate`.
+
+### Connect
+
+```js
+{
+  cmd: 'connect',
+  protocolId: 'MQTT', // Or 'MQIsdp' in MQTT 3.1 and 5.0
+  protocolVersion: 4, // Or 3 in MQTT 3.1, or 5 in MQTT 5.0
+  clean: true, // Can also be false
+  clientId: 'my-device',
+  keepalive: 0, // Seconds which can be any positive number, with 0 as the default setting
+  username: 'matteo',
+  password: Buffer.from('collina'), // Passwords are buffers
+  will: {
+    topic: 'mydevice/status',
+    payload: Buffer.from('dead'), // Payloads are buffers
+    properties: { // MQTT 5.0
+      willDelayInterval: 1234,
+      payloadFormatIndicator: false,
+      messageExpiryInterval: 4321,
+      contentType: 'test',
+      responseTopic: 'topic',
+      correlationData: Buffer.from([1, 2, 3, 4]),
+      userProperties: {
+        'test': 'test'
+      }
+    }
+  },
+  properties: { // MQTT 5.0 properties
+      sessionExpiryInterval: 1234,
+      receiveMaximum: 432,
+      maximumPacketSize: 100,
+      topicAliasMaximum: 456,
+      requestResponseInformation: true,
+      requestProblemInformation: true,
+      userProperties: {
+        'test': 'test'
+      },
+      authenticationMethod: 'test',
+      authenticationData: Buffer.from([1, 2, 3, 4])
+  }
+}
+```
+
+If `protocolVersion` is 3, `clientId` is mandatory and `generate` will throw if
+missing.
+
+If `password` or `will.payload` are passed as strings, they will
+automatically be converted into a `Buffer`.
+
+### Connack
+
+```js
+{
+  cmd: 'connack',
+  returnCode: 0, // Or whatever else you see fit MQTT < 5.0
+  sessionPresent: false, // Can also be true.
+  reasonCode: 0, // reason code MQTT 5.0
+  properties: { // MQTT 5.0 properties
+      sessionExpiryInterval: 1234,
+      receiveMaximum: 432,
+      maximumQoS: 2,
+      retainAvailable: true,
+      maximumPacketSize: 100,
+      assignedClientIdentifier: 'test',
+      topicAliasMaximum: 456,
+      reasonString: 'test',
+      userProperties: {
+        'test': 'test'
+      },
+      wildcardSubscriptionAvailable: true,
+      subscriptionIdentifiersAvailable: true,
+      sharedSubscriptionAvailable: false,
+      serverKeepAlive: 1234,
+      responseInformation: 'test',
+      serverReference: 'test',
+      authenticationMethod: 'test',
+      authenticationData: Buffer.from([1, 2, 3, 4])
+  }
+}
+```
+
+The only mandatory argument is `returnCode`, as `generate` will throw if
+missing.
+
+### Subscribe
+
+```js
+{
+  cmd: 'subscribe',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    subscriptionIdentifier: 145,
+    userProperties: {
+      test: 'test'
+    }
+  }
+  subscriptions: [{
+    topic: 'test',
+    qos: 0,
+    nl: false, // no Local MQTT 5.0 flag
+    rap: true, // Retain as Published MQTT 5.0 flag
+    rh: 1 // Retain Handling MQTT 5.0
+  }]
+}
+```
+
+All properties are mandatory.
+
+### Suback
+
+```js
+{
+  cmd: 'suback',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    reasonString: 'test',
+    userProperties: {
+      'test': 'test'
+    }
+  }
+  granted: [0, 1, 2, 128]
+}
+```
+
+All the granted qos __must__ be < 256, as they are encoded as UInt8.
+All properties are mandatory.
+
+### Unsubscribe
+
+```js
+{
+  cmd: 'unsubscribe',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    userProperties: {
+      'test': 'test'
+    }
+  }
+  unsubscriptions: [
+    'test',
+    'a/topic'
+  ]
+}
+```
+
+All properties are mandatory.
+
+### Unsuback
+
+```js
+{
+  cmd: 'unsuback',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    reasonString: 'test',
+    userProperties: {
+      'test': 'test'
+    }
+  }
+}
+```
+
+All properties are mandatory.
+
+### Publish
+
+```js
+{
+  cmd: 'publish',
+  messageId: 42,
+  qos: 2,
+  dup: false,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  retain: false,
+  properties: { // optional properties MQTT 5.0
+      payloadFormatIndicator: true,
+      messageExpiryInterval: 4321,
+      topicAlias: 100,
+      responseTopic: 'topic',
+      correlationData: Buffer.from([1, 2, 3, 4]),
+      userProperties: {
+        'test': 'test'
+      },
+      subscriptionIdentifier: 120, // can be an Array in message from broker, if message included in few another subscriptions
+      contentType: 'test'
+   }
+}
+```
+
+Only the `topic` property is mandatory.
+Both `topic` and `payload` can be `Buffer` objects instead of strings.
+`messageId` is mandatory for `qos > 0`.
+
+### Puback
+
+```js
+{
+  cmd: 'puback',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // MQTT 5.0 properties
+      reasonString: 'test',
+      userProperties: {
+        'test': 'test'
+      }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pubrec
+
+```js
+{
+  cmd: 'pubrec',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // properties MQTT 5.0
+    reasonString: 'test',
+    userProperties: {
+      'test': 'test'
+    }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pubrel
+
+```js
+{
+  cmd: 'pubrel',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // properties MQTT 5.0
+     reasonString: 'test',
+     userProperties: {
+       'test': 'test'
+     }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pubcomp
+
+```js
+{
+  cmd: 'pubcomp',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // properties MQTT 5.0
+    reasonString: 'test',
+    userProperties: {
+       'test': 'test'
+    }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pingreq
+
+```js
+{
+  cmd: 'pingreq'
+}
+```
+
+### Pingresp
+
+```js
+{
+  cmd: 'pingresp'
+}
+```
+
+### Disconnect
+
+```js
+{
+  cmd: 'disconnect',
+  reasonCode: 0, // MQTT 5.0 code
+  properties: { // properties MQTT 5.0
+     sessionExpiryInterval: 145,
+     reasonString: 'test',
+     userProperties: {
+       'test': 'test'
+     },
+     serverReference: 'test'
+  }
+}
+```
+
+### Auth
+
+```js
+{
+  cmd: 'auth',
+  reasonCode: 0, // MQTT 5.0 code
+  properties: { // properties MQTT 5.0
+     authenticationMethod: 'test',
+     authenticationData: Buffer.from([0, 1, 2, 3]),
+     reasonString: 'test',
+     userProperties: {
+       'test': 'test'
+     }
+  }
+}
+```
+
+<a name="contributing"></a>
+
+Contributing
+------------
+
+mqtt-packet is an **OPEN Open Source Project**. This means that:
+
+> Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.
+
+See the [CONTRIBUTING.md](https://github.com/mqttjs/mqtt-packet/blob/master/CONTRIBUTING.md) file for more details.
+
+### Contributors
+
+mqtt-packet is only possible due to the excellent work of the following contributors:
+
+<table><tbody>
+<tr><th align="left">Matteo Collina</th><td><a href="https://github.com/mcollina">GitHub/mcollina</a></td><td><a href="http://twitter.com/matteocollina">Twitter/@matteocollina</a></td></tr>
+<tr><th align="left">Adam Rudd</th><td><a href="https://github.com/adamvr">GitHub/adamvr</a></td><td><a href="http://twitter.com/adam_vr">Twitter/@adam_vr</a></td></tr>
+<tr><th align="left">Peter Sorowka</th><td><a href="https://github.com/psorowka">GitHub/psorowka</a></td><td><a href="http://twitter.com/psorowka">Twitter/@psorowka</a></td></tr>
+<tr><th align="left">Siarhei Buntsevich</th><td><a href="https://github.com/scarry1992">GitHub/scarry1992</a></td></tr>
+</tbody></table>
+
+License
+-------
+
+MIT
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/generate.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/generate.js
new file mode 100644
index 0000000..0d7ce7e
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/generate.js
@@ -0,0 +1,26 @@
+const mqtt = require('../')
+const max = 100000
+let i
+const buf = Buffer.from('test')
+
+// initialize it
+mqtt.generate({
+  cmd: 'publish',
+  topic: 'test',
+  payload: buf
+})
+
+const start = Date.now()
+
+for (i = 0; i < max; i++) {
+  mqtt.generate({
+    cmd: 'publish',
+    topic: 'test',
+    payload: buf
+  })
+}
+
+const time = Date.now() - start
+console.log('Total time', time)
+console.log('Total packets', max)
+console.log('Packet/s', max / time * 1000)
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/generateNet.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/generateNet.js
new file mode 100644
index 0000000..852ac94
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/generateNet.js
@@ -0,0 +1,51 @@
+
+const mqtt = require('../')
+const max = 1000000
+let i = 0
+const start = Date.now()
+let time
+const buf = Buffer.allocUnsafe(10)
+const net = require('net')
+const server = net.createServer(handle)
+let dest
+
+buf.fill('test')
+
+function handle (sock) {
+  sock.resume()
+}
+
+server.listen(0, () => {
+  dest = net.connect(server.address())
+
+  dest.on('connect', tickWait)
+  dest.on('drain', tickWait)
+  dest.on('finish', () => {
+    time = Date.now() - start
+    console.log('Total time', time)
+    console.log('Total packets', max)
+    console.log('Packet/s', max / time * 1000)
+    server.close()
+  })
+})
+
+function tickWait () {
+  // console.log('tickWait', i)
+  let res = true
+  // var toSend = new Buffer(5 + buf.length)
+
+  for (; i < max && res; i++) {
+    res = dest.write(mqtt.generate({
+      cmd: 'publish',
+      topic: 'test',
+      payload: buf
+    }))
+    // buf.copy(toSend, 5)
+    // res = dest.write(toSend, 'buffer')
+    // console.log(res)
+  }
+
+  if (i >= max) {
+    dest.end()
+  }
+}
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/parse.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/parse.js
new file mode 100644
index 0000000..e6df8ee
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/parse.js
@@ -0,0 +1,20 @@
+
+const mqtt = require('../')
+const parser = mqtt.parser()
+const max = 10000000
+let i
+const start = Date.now() / 1000
+
+for (i = 0; i < max; i++) {
+  parser.parse(Buffer.from([
+    48, 10, // Header (publish)
+    0, 4, // Topic length
+    116, 101, 115, 116, // Topic (test)
+    116, 101, 115, 116 // Payload (test)
+  ]))
+}
+
+const time = Date.now() / 1000 - start
+console.log('Total packets', max)
+console.log('Total time', Math.round(time * 100) / 100)
+console.log('Packet/s', max / time)
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/writeToStream.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/writeToStream.js
new file mode 100644
index 0000000..919b53d
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/benchmarks/writeToStream.js
@@ -0,0 +1,49 @@
+
+const mqtt = require('../')
+const max = 1000000
+let i = 0
+const start = Date.now()
+let time
+const buf = Buffer.allocUnsafe(10)
+const net = require('net')
+const server = net.createServer(handle)
+let dest
+
+function handle (sock) {
+  sock.resume()
+}
+
+buf.fill('test')
+
+server.listen(0, () => {
+  dest = net.connect(server.address())
+
+  dest.on('connect', tickWait)
+  dest.on('drain', tickWait)
+  dest.on('finish', () => {
+    time = Date.now() - start
+    console.log('Total time', time)
+    console.log('Total packets', max)
+    console.log('Packet/s', max / time * 1000)
+    server.close()
+  })
+})
+
+function tickWait () {
+  let res = true
+  // var toSend = new Buffer(5)
+
+  for (; i < max && res; i++) {
+    res = mqtt.writeToStream({
+      cmd: 'publish',
+      topic: 'test',
+      payload: buf
+    }, dest)
+    // dest.write(toSend, 'buffer')
+    // res = dest.write(buf, 'buffer')
+  }
+
+  if (i >= max) {
+    dest.end()
+  }
+}
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/constants.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/constants.js
new file mode 100644
index 0000000..608ed75
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/constants.js
@@ -0,0 +1,290 @@
+/* Protocol - protocol constants */
+const protocol = module.exports
+
+/* Command code => mnemonic */
+protocol.types = {
+  0: 'reserved',
+  1: 'connect',
+  2: 'connack',
+  3: 'publish',
+  4: 'puback',
+  5: 'pubrec',
+  6: 'pubrel',
+  7: 'pubcomp',
+  8: 'subscribe',
+  9: 'suback',
+  10: 'unsubscribe',
+  11: 'unsuback',
+  12: 'pingreq',
+  13: 'pingresp',
+  14: 'disconnect',
+  15: 'auth'
+}
+
+protocol.requiredHeaderFlags = {
+  1: 0, // 'connect'
+  2: 0, // 'connack'
+  4: 0, // 'puback'
+  5: 0, // 'pubrec'
+  6: 2, // 'pubrel'
+  7: 0, // 'pubcomp'
+  8: 2, // 'subscribe'
+  9: 0, // 'suback'
+  10: 2, // 'unsubscribe'
+  11: 0, // 'unsuback'
+  12: 0, // 'pingreq'
+  13: 0, // 'pingresp'
+  14: 0, // 'disconnect'
+  15: 0 // 'auth'
+}
+
+protocol.requiredHeaderFlagsErrors = {}
+for (const k in protocol.requiredHeaderFlags) {
+  const v = protocol.requiredHeaderFlags[k]
+  protocol.requiredHeaderFlagsErrors[k] = 'Invalid header flag bits, must be 0x' + v.toString(16) + ' for ' + protocol.types[k] + ' packet'
+}
+
+/* Mnemonic => Command code */
+protocol.codes = {}
+for (const k in protocol.types) {
+  const v = protocol.types[k]
+  protocol.codes[v] = k
+}
+
+/* Header */
+protocol.CMD_SHIFT = 4
+protocol.CMD_MASK = 0xF0
+protocol.DUP_MASK = 0x08
+protocol.QOS_MASK = 0x03
+protocol.QOS_SHIFT = 1
+protocol.RETAIN_MASK = 0x01
+
+/* Length */
+protocol.VARBYTEINT_MASK = 0x7F
+protocol.VARBYTEINT_FIN_MASK = 0x80
+protocol.VARBYTEINT_MAX = 268435455
+
+/* Connack */
+protocol.SESSIONPRESENT_MASK = 0x01
+protocol.SESSIONPRESENT_HEADER = Buffer.from([protocol.SESSIONPRESENT_MASK])
+protocol.CONNACK_HEADER = Buffer.from([protocol.codes.connack << protocol.CMD_SHIFT])
+
+/* Connect */
+protocol.USERNAME_MASK = 0x80
+protocol.PASSWORD_MASK = 0x40
+protocol.WILL_RETAIN_MASK = 0x20
+protocol.WILL_QOS_MASK = 0x18
+protocol.WILL_QOS_SHIFT = 3
+protocol.WILL_FLAG_MASK = 0x04
+protocol.CLEAN_SESSION_MASK = 0x02
+protocol.CONNECT_HEADER = Buffer.from([protocol.codes.connect << protocol.CMD_SHIFT])
+
+/* Properties */
+protocol.properties = {
+  sessionExpiryInterval: 17,
+  willDelayInterval: 24,
+  receiveMaximum: 33,
+  maximumPacketSize: 39,
+  topicAliasMaximum: 34,
+  requestResponseInformation: 25,
+  requestProblemInformation: 23,
+  userProperties: 38,
+  authenticationMethod: 21,
+  authenticationData: 22,
+  payloadFormatIndicator: 1,
+  messageExpiryInterval: 2,
+  contentType: 3,
+  responseTopic: 8,
+  correlationData: 9,
+  maximumQoS: 36,
+  retainAvailable: 37,
+  assignedClientIdentifier: 18,
+  reasonString: 31,
+  wildcardSubscriptionAvailable: 40,
+  subscriptionIdentifiersAvailable: 41,
+  sharedSubscriptionAvailable: 42,
+  serverKeepAlive: 19,
+  responseInformation: 26,
+  serverReference: 28,
+  topicAlias: 35,
+  subscriptionIdentifier: 11
+}
+protocol.propertiesCodes = {}
+for (const prop in protocol.properties) {
+  const id = protocol.properties[prop]
+  protocol.propertiesCodes[id] = prop
+}
+protocol.propertiesTypes = {
+  sessionExpiryInterval: 'int32',
+  willDelayInterval: 'int32',
+  receiveMaximum: 'int16',
+  maximumPacketSize: 'int32',
+  topicAliasMaximum: 'int16',
+  requestResponseInformation: 'byte',
+  requestProblemInformation: 'byte',
+  userProperties: 'pair',
+  authenticationMethod: 'string',
+  authenticationData: 'binary',
+  payloadFormatIndicator: 'byte',
+  messageExpiryInterval: 'int32',
+  contentType: 'string',
+  responseTopic: 'string',
+  correlationData: 'binary',
+  maximumQoS: 'int8',
+  retainAvailable: 'byte',
+  assignedClientIdentifier: 'string',
+  reasonString: 'string',
+  wildcardSubscriptionAvailable: 'byte',
+  subscriptionIdentifiersAvailable: 'byte',
+  sharedSubscriptionAvailable: 'byte',
+  serverKeepAlive: 'int16',
+  responseInformation: 'string',
+  serverReference: 'string',
+  topicAlias: 'int16',
+  subscriptionIdentifier: 'var'
+}
+
+function genHeader (type) {
+  return [0, 1, 2].map(qos => {
+    return [0, 1].map(dup => {
+      return [0, 1].map(retain => {
+        const buf = Buffer.alloc(1)
+        buf.writeUInt8(
+          protocol.codes[type] << protocol.CMD_SHIFT |
+          (dup ? protocol.DUP_MASK : 0) |
+          qos << protocol.QOS_SHIFT | retain, 0, true)
+        return buf
+      })
+    })
+  })
+}
+
+/* Publish */
+protocol.PUBLISH_HEADER = genHeader('publish')
+
+/* Subscribe */
+protocol.SUBSCRIBE_HEADER = genHeader('subscribe')
+protocol.SUBSCRIBE_OPTIONS_QOS_MASK = 0x03
+protocol.SUBSCRIBE_OPTIONS_NL_MASK = 0x01
+protocol.SUBSCRIBE_OPTIONS_NL_SHIFT = 2
+protocol.SUBSCRIBE_OPTIONS_RAP_MASK = 0x01
+protocol.SUBSCRIBE_OPTIONS_RAP_SHIFT = 3
+protocol.SUBSCRIBE_OPTIONS_RH_MASK = 0x03
+protocol.SUBSCRIBE_OPTIONS_RH_SHIFT = 4
+protocol.SUBSCRIBE_OPTIONS_RH = [0x00, 0x10, 0x20]
+protocol.SUBSCRIBE_OPTIONS_NL = 0x04
+protocol.SUBSCRIBE_OPTIONS_RAP = 0x08
+protocol.SUBSCRIBE_OPTIONS_QOS = [0x00, 0x01, 0x02]
+
+/* Unsubscribe */
+protocol.UNSUBSCRIBE_HEADER = genHeader('unsubscribe')
+
+/* Confirmations */
+protocol.ACKS = {
+  unsuback: genHeader('unsuback'),
+  puback: genHeader('puback'),
+  pubcomp: genHeader('pubcomp'),
+  pubrel: genHeader('pubrel'),
+  pubrec: genHeader('pubrec')
+}
+
+protocol.SUBACK_HEADER = Buffer.from([protocol.codes.suback << protocol.CMD_SHIFT])
+
+/* Protocol versions */
+protocol.VERSION3 = Buffer.from([3])
+protocol.VERSION4 = Buffer.from([4])
+protocol.VERSION5 = Buffer.from([5])
+protocol.VERSION131 = Buffer.from([131])
+protocol.VERSION132 = Buffer.from([132])
+
+/* QoS */
+protocol.QOS = [0, 1, 2].map(qos => {
+  return Buffer.from([qos])
+})
+
+/* Empty packets */
+protocol.EMPTY = {
+  pingreq: Buffer.from([protocol.codes.pingreq << 4, 0]),
+  pingresp: Buffer.from([protocol.codes.pingresp << 4, 0]),
+  disconnect: Buffer.from([protocol.codes.disconnect << 4, 0])
+}
+
+protocol.MQTT5_PUBACK_PUBREC_CODES = {
+  0x00: 'Success',
+  0x10: 'No matching subscribers',
+  0x80: 'Unspecified error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x90: 'Topic Name invalid',
+  0x91: 'Packet identifier in use',
+  0x97: 'Quota exceeded',
+  0x99: 'Payload format invalid'
+}
+
+protocol.MQTT5_PUBREL_PUBCOMP_CODES = {
+  0x00: 'Success',
+  0x92: 'Packet Identifier not found'
+}
+
+protocol.MQTT5_SUBACK_CODES = {
+  0x00: 'Granted QoS 0',
+  0x01: 'Granted QoS 1',
+  0x02: 'Granted QoS 2',
+  0x80: 'Unspecified error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x8F: 'Topic Filter invalid',
+  0x91: 'Packet Identifier in use',
+  0x97: 'Quota exceeded',
+  0x9E: 'Shared Subscriptions not supported',
+  0xA1: 'Subscription Identifiers not supported',
+  0xA2: 'Wildcard Subscriptions not supported'
+}
+
+protocol.MQTT5_UNSUBACK_CODES = {
+  0x00: 'Success',
+  0x11: 'No subscription existed',
+  0x80: 'Unspecified error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x8F: 'Topic Filter invalid',
+  0x91: 'Packet Identifier in use'
+}
+
+protocol.MQTT5_DISCONNECT_CODES = {
+  0x00: 'Normal disconnection',
+  0x04: 'Disconnect with Will Message',
+  0x80: 'Unspecified error',
+  0x81: 'Malformed Packet',
+  0x82: 'Protocol Error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x89: 'Server busy',
+  0x8B: 'Server shutting down',
+  0x8D: 'Keep Alive timeout',
+  0x8E: 'Session taken over',
+  0x8F: 'Topic Filter invalid',
+  0x90: 'Topic Name invalid',
+  0x93: 'Receive Maximum exceeded',
+  0x94: 'Topic Alias invalid',
+  0x95: 'Packet too large',
+  0x96: 'Message rate too high',
+  0x97: 'Quota exceeded',
+  0x98: 'Administrative action',
+  0x99: 'Payload format invalid',
+  0x9A: 'Retain not supported',
+  0x9B: 'QoS not supported',
+  0x9C: 'Use another server',
+  0x9D: 'Server moved',
+  0x9E: 'Shared Subscriptions not supported',
+  0x9F: 'Connection rate exceeded',
+  0xA0: 'Maximum connect time',
+  0xA1: 'Subscription Identifiers not supported',
+  0xA2: 'Wildcard Subscriptions not supported'
+}
+
+protocol.MQTT5_AUTH_CODES = {
+  0x00: 'Success',
+  0x18: 'Continue authentication',
+  0x19: 'Re-authenticate'
+}
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/generate.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/generate.js
new file mode 100644
index 0000000..a426bdb
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/generate.js
@@ -0,0 +1,52 @@
+const writeToStream = require('./writeToStream')
+const EventEmitter = require('events')
+
+function generate (packet, opts) {
+  const stream = new Accumulator()
+  writeToStream(packet, stream, opts)
+  return stream.concat()
+}
+
+class Accumulator extends EventEmitter {
+  constructor () {
+    super()
+    this._array = new Array(20)
+    this._i = 0
+  }
+
+  write (chunk) {
+    this._array[this._i++] = chunk
+    return true
+  }
+
+  concat () {
+    let length = 0
+    const lengths = new Array(this._array.length)
+    const list = this._array
+    let pos = 0
+    let i
+
+    for (i = 0; i < list.length && list[i] !== undefined; i++) {
+      if (typeof list[i] !== 'string') lengths[i] = list[i].length
+      else lengths[i] = Buffer.byteLength(list[i])
+
+      length += lengths[i]
+    }
+
+    const result = Buffer.allocUnsafe(length)
+
+    for (i = 0; i < list.length && list[i] !== undefined; i++) {
+      if (typeof list[i] !== 'string') {
+        list[i].copy(result, pos)
+        pos += lengths[i]
+      } else {
+        result.write(list[i], pos)
+        pos += lengths[i]
+      }
+    }
+
+    return result
+  }
+}
+
+module.exports = generate
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/mqtt.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/mqtt.js
new file mode 100644
index 0000000..f23c8d7
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/mqtt.js
@@ -0,0 +1,3 @@
+exports.parser = require('./parser').parser
+exports.generate = require('./generate')
+exports.writeToStream = require('./writeToStream')
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/numbers.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/numbers.js
new file mode 100644
index 0000000..c89ea11
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/numbers.js
@@ -0,0 +1,58 @@
+const max = 65536
+const cache = {}
+
+// in node 6 Buffer.subarray returns a Uint8Array instead of a Buffer
+// later versions return a Buffer
+// alternative is Buffer.slice but that creates a new buffer
+// creating new buffers takes time
+// SubOk is only false on node < 8
+const SubOk = Buffer.isBuffer(Buffer.from([1, 2]).subarray(0, 1))
+
+function generateBuffer (i) {
+  const buffer = Buffer.allocUnsafe(2)
+  buffer.writeUInt8(i >> 8, 0)
+  buffer.writeUInt8(i & 0x00FF, 0 + 1)
+
+  return buffer
+}
+
+function generateCache () {
+  for (let i = 0; i < max; i++) {
+    cache[i] = generateBuffer(i)
+  }
+}
+
+function genBufVariableByteInt (num) {
+  const maxLength = 4 // max 4 bytes
+  let digit = 0
+  let pos = 0
+  const buffer = Buffer.allocUnsafe(maxLength)
+
+  do {
+    digit = num % 128 | 0
+    num = num / 128 | 0
+    if (num > 0) digit = digit | 0x80
+
+    buffer.writeUInt8(digit, pos++)
+  } while (num > 0 && pos < maxLength)
+
+  if (num > 0) {
+    pos = 0
+  }
+
+  return SubOk ? buffer.subarray(0, pos) : buffer.slice(0, pos)
+}
+
+function generate4ByteBuffer (num) {
+  const buffer = Buffer.allocUnsafe(4)
+  buffer.writeUInt32BE(num, 0)
+  return buffer
+}
+
+module.exports = {
+  cache,
+  generateCache,
+  generateNumber: generateBuffer,
+  genBufVariableByteInt,
+  generate4ByteBuffer
+}
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/package.json b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/package.json
new file mode 100644
index 0000000..195da0f
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/package.json
@@ -0,0 +1,48 @@
+{
+  "name": "mqtt-packet",
+  "version": "7.1.2",
+  "description": "Parse and generate MQTT packets like a breeze",
+  "main": "mqtt.js",
+  "types": "types/index.d.ts",
+  "contributors": [
+    "Matteo Collina <matteo.collina@gmail.com> (https://github.com/mcollina)",
+    "Adam Rudd <damvrr@gmail.com>",
+    "Peter Sorowka (https://github.com/psorowka)",
+    "Wouter Klijn <contact@wuhkuh.com> (https://github.com/wuhkuh)",
+    "Siarhei Buntsevich (https://github.com/scarry1992)"
+  ],
+  "scripts": {
+    "test": "tape test.js | tap-spec && standard",
+    "ci": "tape test.js && node testRandom && standard"
+  },
+  "pre-commit": "test",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mqttjs/mqtt-packet.git"
+  },
+  "keywords": [
+    "MQTT",
+    "packet",
+    "parse",
+    "publish",
+    "subscribe",
+    "pubsub"
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mqttjs/mqtt-packet/issues"
+  },
+  "homepage": "https://github.com/mqttjs/mqtt-packet",
+  "devDependencies": {
+    "pre-commit": "^1.2.2",
+    "readable-stream": "^3.6.0",
+    "standard": "^16.0.0",
+    "tap-spec": "^5.0.0",
+    "tape": "^5.0.1"
+  },
+  "dependencies": {
+    "bl": "^4.0.2",
+    "debug": "^4.1.1",
+    "process-nextick-args": "^2.0.1"
+  }
+}
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/packet.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/packet.js
new file mode 100644
index 0000000..4ef1e78
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/packet.js
@@ -0,0 +1,13 @@
+class Packet {
+  constructor () {
+    this.cmd = null
+    this.retain = false
+    this.qos = 0
+    this.dup = false
+    this.length = -1
+    this.topic = null
+    this.payload = null
+  }
+}
+
+module.exports = Packet
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/parser.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/parser.js
new file mode 100644
index 0000000..e16d74c
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/parser.js
@@ -0,0 +1,809 @@
+const bl = require('bl')
+const EventEmitter = require('events')
+const Packet = require('./packet')
+const constants = require('./constants')
+const debug = require('debug')('mqtt-packet:parser')
+
+class Parser extends EventEmitter {
+  constructor () {
+    super()
+    this.parser = this.constructor.parser
+  }
+
+  static parser (opt) {
+    if (!(this instanceof Parser)) return (new Parser()).parser(opt)
+
+    this.settings = opt || {}
+
+    this._states = [
+      '_parseHeader',
+      '_parseLength',
+      '_parsePayload',
+      '_newPacket'
+    ]
+
+    this._resetState()
+    return this
+  }
+
+  _resetState () {
+    debug('_resetState: resetting packet, error, _list, and _stateCounter')
+    this.packet = new Packet()
+    this.error = null
+    this._list = bl()
+    this._stateCounter = 0
+  }
+
+  parse (buf) {
+    if (this.error) this._resetState()
+
+    this._list.append(buf)
+    debug('parse: current state: %s', this._states[this._stateCounter])
+    while ((this.packet.length !== -1 || this._list.length > 0) &&
+      this[this._states[this._stateCounter]]() &&
+      !this.error) {
+      this._stateCounter++
+      debug('parse: state complete. _stateCounter is now: %d', this._stateCounter)
+      debug('parse: packet.length: %d, buffer list length: %d', this.packet.length, this._list.length)
+      if (this._stateCounter >= this._states.length) this._stateCounter = 0
+    }
+    debug('parse: exited while loop. packet: %d, buffer list length: %d', this.packet.length, this._list.length)
+    return this._list.length
+  }
+
+  _parseHeader () {
+    // There is at least one byte in the buffer
+    const zero = this._list.readUInt8(0)
+    const cmdIndex = zero >> constants.CMD_SHIFT
+    this.packet.cmd = constants.types[cmdIndex]
+    const headerFlags = zero & 0xf
+    const requiredHeaderFlags = constants.requiredHeaderFlags[cmdIndex]
+    if (requiredHeaderFlags != null && headerFlags !== requiredHeaderFlags) {
+      // Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+      return this._emitError(new Error(constants.requiredHeaderFlagsErrors[cmdIndex]))
+    }
+    this.packet.retain = (zero & constants.RETAIN_MASK) !== 0
+    this.packet.qos = (zero >> constants.QOS_SHIFT) & constants.QOS_MASK
+    if (this.packet.qos > 2) {
+      return this._emitError(new Error('Packet must not have both QoS bits set to 1'))
+    }
+    this.packet.dup = (zero & constants.DUP_MASK) !== 0
+    debug('_parseHeader: packet: %o', this.packet)
+
+    this._list.consume(1)
+
+    return true
+  }
+
+  _parseLength () {
+    // There is at least one byte in the list
+    const result = this._parseVarByteNum(true)
+
+    if (result) {
+      this.packet.length = result.value
+      this._list.consume(result.bytes)
+    }
+    debug('_parseLength %d', result.value)
+    return !!result
+  }
+
+  _parsePayload () {
+    debug('_parsePayload: payload %O', this._list)
+    let result = false
+
+    // Do we have a payload? Do we have enough data to complete the payload?
+    // PINGs have no payload
+    if (this.packet.length === 0 || this._list.length >= this.packet.length) {
+      this._pos = 0
+
+      switch (this.packet.cmd) {
+        case 'connect':
+          this._parseConnect()
+          break
+        case 'connack':
+          this._parseConnack()
+          break
+        case 'publish':
+          this._parsePublish()
+          break
+        case 'puback':
+        case 'pubrec':
+        case 'pubrel':
+        case 'pubcomp':
+          this._parseConfirmation()
+          break
+        case 'subscribe':
+          this._parseSubscribe()
+          break
+        case 'suback':
+          this._parseSuback()
+          break
+        case 'unsubscribe':
+          this._parseUnsubscribe()
+          break
+        case 'unsuback':
+          this._parseUnsuback()
+          break
+        case 'pingreq':
+        case 'pingresp':
+          // These are empty, nothing to do
+          break
+        case 'disconnect':
+          this._parseDisconnect()
+          break
+        case 'auth':
+          this._parseAuth()
+          break
+        default:
+          this._emitError(new Error('Not supported'))
+      }
+
+      result = true
+    }
+    debug('_parsePayload complete result: %s', result)
+    return result
+  }
+
+  _parseConnect () {
+    debug('_parseConnect')
+    let topic // Will topic
+    let payload // Will payload
+    let password // Password
+    let username // Username
+    const flags = {}
+    const packet = this.packet
+
+    // Parse protocolId
+    const protocolId = this._parseString()
+
+    if (protocolId === null) return this._emitError(new Error('Cannot parse protocolId'))
+    if (protocolId !== 'MQTT' && protocolId !== 'MQIsdp') {
+      return this._emitError(new Error('Invalid protocolId'))
+    }
+
+    packet.protocolId = protocolId
+
+    // Parse constants version number
+    if (this._pos >= this._list.length) return this._emitError(new Error('Packet too short'))
+
+    packet.protocolVersion = this._list.readUInt8(this._pos)
+
+    if (packet.protocolVersion >= 128) {
+      packet.bridgeMode = true
+      packet.protocolVersion = packet.protocolVersion - 128
+    }
+
+    if (packet.protocolVersion !== 3 && packet.protocolVersion !== 4 && packet.protocolVersion !== 5) {
+      return this._emitError(new Error('Invalid protocol version'))
+    }
+
+    this._pos++
+
+    if (this._pos >= this._list.length) {
+      return this._emitError(new Error('Packet too short'))
+    }
+
+    if (this._list.readUInt8(this._pos) & 0x1) {
+      // The Server MUST validate that the reserved flag in the CONNECT Control Packet is set to zero and disconnect the Client if it is not zero [MQTT-3.1.2-3]
+      return this._emitError(new Error('Connect flag bit 0 must be 0, but got 1'))
+    }
+    // Parse connect flags
+    flags.username = (this._list.readUInt8(this._pos) & constants.USERNAME_MASK)
+    flags.password = (this._list.readUInt8(this._pos) & constants.PASSWORD_MASK)
+    flags.will = (this._list.readUInt8(this._pos) & constants.WILL_FLAG_MASK)
+
+    const willRetain = !!(this._list.readUInt8(this._pos) & constants.WILL_RETAIN_MASK)
+    const willQos = (this._list.readUInt8(this._pos) &
+        constants.WILL_QOS_MASK) >> constants.WILL_QOS_SHIFT
+
+    if (flags.will) {
+      packet.will = {}
+      packet.will.retain = willRetain
+      packet.will.qos = willQos
+    } else {
+      if (willRetain) {
+        return this._emitError(new Error('Will Retain Flag must be set to zero when Will Flag is set to 0'))
+      }
+      if (willQos) {
+        return this._emitError(new Error('Will QoS must be set to zero when Will Flag is set to 0'))
+      }
+    }
+
+    packet.clean = (this._list.readUInt8(this._pos) & constants.CLEAN_SESSION_MASK) !== 0
+    this._pos++
+
+    // Parse keepalive
+    packet.keepalive = this._parseNum()
+    if (packet.keepalive === -1) return this._emitError(new Error('Packet too short'))
+
+    // parse properties
+    if (packet.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+    // Parse clientId
+    const clientId = this._parseString()
+    if (clientId === null) return this._emitError(new Error('Packet too short'))
+    packet.clientId = clientId
+    debug('_parseConnect: packet.clientId: %s', packet.clientId)
+
+    if (flags.will) {
+      if (packet.protocolVersion === 5) {
+        const willProperties = this._parseProperties()
+        if (Object.getOwnPropertyNames(willProperties).length) {
+          packet.will.properties = willProperties
+        }
+      }
+      // Parse will topic
+      topic = this._parseString()
+      if (topic === null) return this._emitError(new Error('Cannot parse will topic'))
+      packet.will.topic = topic
+      debug('_parseConnect: packet.will.topic: %s', packet.will.topic)
+
+      // Parse will payload
+      payload = this._parseBuffer()
+      if (payload === null) return this._emitError(new Error('Cannot parse will payload'))
+      packet.will.payload = payload
+      debug('_parseConnect: packet.will.paylaod: %s', packet.will.payload)
+    }
+
+    // Parse username
+    if (flags.username) {
+      username = this._parseString()
+      if (username === null) return this._emitError(new Error('Cannot parse username'))
+      packet.username = username
+      debug('_parseConnect: packet.username: %s', packet.username)
+    }
+
+    // Parse password
+    if (flags.password) {
+      password = this._parseBuffer()
+      if (password === null) return this._emitError(new Error('Cannot parse password'))
+      packet.password = password
+    }
+    // need for right parse auth packet and self set up
+    this.settings = packet
+    debug('_parseConnect: complete')
+    return packet
+  }
+
+  _parseConnack () {
+    debug('_parseConnack')
+    const packet = this.packet
+
+    if (this._list.length < 1) return null
+    const flags = this._list.readUInt8(this._pos++)
+    if (flags > 1) {
+      return this._emitError(new Error('Invalid connack flags, bits 7-1 must be set to 0'))
+    }
+    packet.sessionPresent = !!(flags & constants.SESSIONPRESENT_MASK)
+
+    if (this.settings.protocolVersion === 5) {
+      if (this._list.length >= 2) {
+        packet.reasonCode = this._list.readUInt8(this._pos++)
+      } else {
+        packet.reasonCode = 0
+      }
+    } else {
+      if (this._list.length < 2) return null
+      packet.returnCode = this._list.readUInt8(this._pos++)
+    }
+
+    if (packet.returnCode === -1 || packet.reasonCode === -1) return this._emitError(new Error('Cannot parse return code'))
+    // mqtt 5 properties
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+    debug('_parseConnack: complete')
+  }
+
+  _parsePublish () {
+    debug('_parsePublish')
+    const packet = this.packet
+    packet.topic = this._parseString()
+
+    if (packet.topic === null) return this._emitError(new Error('Cannot parse topic'))
+
+    // Parse messageId
+    if (packet.qos > 0) if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    packet.payload = this._list.slice(this._pos, packet.length)
+    debug('_parsePublish: payload from buffer list: %o', packet.payload)
+  }
+
+  _parseSubscribe () {
+    debug('_parseSubscribe')
+    const packet = this.packet
+    let topic
+    let options
+    let qos
+    let rh
+    let rap
+    let nl
+    let subscription
+
+    packet.subscriptions = []
+
+    if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed subscribe, no payload specified')) }
+
+    while (this._pos < packet.length) {
+      // Parse topic
+      topic = this._parseString()
+      if (topic === null) return this._emitError(new Error('Cannot parse topic'))
+      if (this._pos >= packet.length) return this._emitError(new Error('Malformed Subscribe Payload'))
+
+      options = this._parseByte()
+
+      if (this.settings.protocolVersion === 5) {
+        if (options & 0xc0) {
+          return this._emitError(new Error('Invalid subscribe topic flag bits, bits 7-6 must be 0'))
+        }
+      } else {
+        if (options & 0xfc) {
+          return this._emitError(new Error('Invalid subscribe topic flag bits, bits 7-2 must be 0'))
+        }
+      }
+
+      qos = options & constants.SUBSCRIBE_OPTIONS_QOS_MASK
+      if (qos > 2) {
+        return this._emitError(new Error('Invalid subscribe QoS, must be <= 2'))
+      }
+      nl = ((options >> constants.SUBSCRIBE_OPTIONS_NL_SHIFT) & constants.SUBSCRIBE_OPTIONS_NL_MASK) !== 0
+      rap = ((options >> constants.SUBSCRIBE_OPTIONS_RAP_SHIFT) & constants.SUBSCRIBE_OPTIONS_RAP_MASK) !== 0
+      rh = (options >> constants.SUBSCRIBE_OPTIONS_RH_SHIFT) & constants.SUBSCRIBE_OPTIONS_RH_MASK
+
+      if (rh > 2) {
+        return this._emitError(new Error('Invalid retain handling, must be <= 2'))
+      }
+
+      subscription = { topic, qos }
+
+      // mqtt 5 options
+      if (this.settings.protocolVersion === 5) {
+        subscription.nl = nl
+        subscription.rap = rap
+        subscription.rh = rh
+      } else if (this.settings.bridgeMode) {
+        subscription.rh = 0
+        subscription.rap = true
+        subscription.nl = true
+      }
+
+      // Push pair to subscriptions
+      debug('_parseSubscribe: push subscription `%s` to subscription', subscription)
+      packet.subscriptions.push(subscription)
+    }
+  }
+
+  _parseSuback () {
+    debug('_parseSuback')
+    const packet = this.packet
+    this.packet.granted = []
+
+    if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed suback, no payload specified')) }
+
+    // Parse granted QoSes
+    while (this._pos < this.packet.length) {
+      const code = this._list.readUInt8(this._pos++)
+      if (this.settings.protocolVersion === 5) {
+        if (!constants.MQTT5_SUBACK_CODES[code]) {
+          return this._emitError(new Error('Invalid suback code'))
+        }
+      } else {
+        if (code > 2) {
+          return this._emitError(new Error('Invalid suback QoS, must be <= 2'))
+        }
+      }
+      this.packet.granted.push(code)
+    }
+  }
+
+  _parseUnsubscribe () {
+    debug('_parseUnsubscribe')
+    const packet = this.packet
+
+    packet.unsubscriptions = []
+
+    // Parse messageId
+    if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed unsubscribe, no payload specified')) }
+
+    while (this._pos < packet.length) {
+      // Parse topic
+      const topic = this._parseString()
+      if (topic === null) return this._emitError(new Error('Cannot parse topic'))
+
+      // Push topic to unsubscriptions
+      debug('_parseUnsubscribe: push topic `%s` to unsubscriptions', topic)
+      packet.unsubscriptions.push(topic)
+    }
+  }
+
+  _parseUnsuback () {
+    debug('_parseUnsuback')
+    const packet = this.packet
+    if (!this._parseMessageId()) return this._emitError(new Error('Cannot parse messageId'))
+
+    if ((this.settings.protocolVersion === 3 ||
+      this.settings.protocolVersion === 4) && packet.length !== 2) {
+      return this._emitError(new Error('Malformed unsuback, payload length must be 2'))
+    }
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed unsuback, no payload specified')) }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+      // Parse granted QoSes
+      packet.granted = []
+
+      while (this._pos < this.packet.length) {
+        const code = this._list.readUInt8(this._pos++)
+        if (!constants.MQTT5_UNSUBACK_CODES[code]) {
+          return this._emitError(new Error('Invalid unsuback code'))
+        }
+        this.packet.granted.push(code)
+      }
+    }
+  }
+
+  // parse packets like puback, pubrec, pubrel, pubcomp
+  _parseConfirmation () {
+    debug('_parseConfirmation: packet.cmd: `%s`', this.packet.cmd)
+    const packet = this.packet
+
+    this._parseMessageId()
+
+    if (this.settings.protocolVersion === 5) {
+      if (packet.length > 2) {
+        // response code
+        packet.reasonCode = this._parseByte()
+        switch (this.packet.cmd) {
+          case 'puback':
+          case 'pubrec':
+            if (!constants.MQTT5_PUBACK_PUBREC_CODES[packet.reasonCode]) {
+              return this._emitError(new Error('Invalid ' + this.packet.cmd + ' reason code'))
+            }
+            break
+          case 'pubrel':
+          case 'pubcomp':
+            if (!constants.MQTT5_PUBREL_PUBCOMP_CODES[packet.reasonCode]) {
+              return this._emitError(new Error('Invalid ' + this.packet.cmd + ' reason code'))
+            }
+            break
+        }
+        debug('_parseConfirmation: packet.reasonCode `%d`', packet.reasonCode)
+      } else {
+        packet.reasonCode = 0
+      }
+
+      if (packet.length > 3) {
+        // properies mqtt 5
+        const properties = this._parseProperties()
+        if (Object.getOwnPropertyNames(properties).length) {
+          packet.properties = properties
+        }
+      }
+    }
+
+    return true
+  }
+
+  // parse disconnect packet
+  _parseDisconnect () {
+    const packet = this.packet
+    debug('_parseDisconnect')
+
+    if (this.settings.protocolVersion === 5) {
+      // response code
+      if (this._list.length > 0) {
+        packet.reasonCode = this._parseByte()
+        if (!constants.MQTT5_DISCONNECT_CODES[packet.reasonCode]) {
+          this._emitError(new Error('Invalid disconnect reason code'))
+        }
+      } else {
+        packet.reasonCode = 0
+      }
+      // properies mqtt 5
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    debug('_parseDisconnect result: true')
+    return true
+  }
+
+  // parse auth packet
+  _parseAuth () {
+    debug('_parseAuth')
+    const packet = this.packet
+
+    if (this.settings.protocolVersion !== 5) {
+      return this._emitError(new Error('Not supported auth packet for this version MQTT'))
+    }
+
+    // response code
+    packet.reasonCode = this._parseByte()
+    if (!constants.MQTT5_AUTH_CODES[packet.reasonCode]) {
+      return this._emitError(new Error('Invalid auth reason code'))
+    }
+    // properies mqtt 5
+    const properties = this._parseProperties()
+    if (Object.getOwnPropertyNames(properties).length) {
+      packet.properties = properties
+    }
+
+    debug('_parseAuth: result: true')
+    return true
+  }
+
+  _parseMessageId () {
+    const packet = this.packet
+
+    packet.messageId = this._parseNum()
+
+    if (packet.messageId === null) {
+      this._emitError(new Error('Cannot parse messageId'))
+      return false
+    }
+
+    debug('_parseMessageId: packet.messageId %d', packet.messageId)
+    return true
+  }
+
+  _parseString (maybeBuffer) {
+    const length = this._parseNum()
+    const end = length + this._pos
+
+    if (length === -1 || end > this._list.length || end > this.packet.length) return null
+
+    const result = this._list.toString('utf8', this._pos, end)
+    this._pos += length
+    debug('_parseString: result: %s', result)
+    return result
+  }
+
+  _parseStringPair () {
+    debug('_parseStringPair')
+    return {
+      name: this._parseString(),
+      value: this._parseString()
+    }
+  }
+
+  _parseBuffer () {
+    const length = this._parseNum()
+    const end = length + this._pos
+
+    if (length === -1 || end > this._list.length || end > this.packet.length) return null
+
+    const result = this._list.slice(this._pos, end)
+
+    this._pos += length
+    debug('_parseBuffer: result: %o', result)
+    return result
+  }
+
+  _parseNum () {
+    if (this._list.length - this._pos < 2) return -1
+
+    const result = this._list.readUInt16BE(this._pos)
+    this._pos += 2
+    debug('_parseNum: result: %s', result)
+    return result
+  }
+
+  _parse4ByteNum () {
+    if (this._list.length - this._pos < 4) return -1
+
+    const result = this._list.readUInt32BE(this._pos)
+    this._pos += 4
+    debug('_parse4ByteNum: result: %s', result)
+    return result
+  }
+
+  _parseVarByteNum (fullInfoFlag) {
+    debug('_parseVarByteNum')
+    const maxBytes = 4
+    let bytes = 0
+    let mul = 1
+    let value = 0
+    let result = false
+    let current
+    const padding = this._pos ? this._pos : 0
+
+    while (bytes < maxBytes && (padding + bytes) < this._list.length) {
+      current = this._list.readUInt8(padding + bytes++)
+      value += mul * (current & constants.VARBYTEINT_MASK)
+      mul *= 0x80
+
+      if ((current & constants.VARBYTEINT_FIN_MASK) === 0) {
+        result = true
+        break
+      }
+      if (this._list.length <= bytes) {
+        break
+      }
+    }
+
+    if (!result && bytes === maxBytes && this._list.length >= bytes) {
+      this._emitError(new Error('Invalid variable byte integer'))
+    }
+
+    if (padding) {
+      this._pos += bytes
+    }
+
+    if (result) {
+      if (fullInfoFlag) {
+        result = { bytes, value }
+      } else {
+        result = value
+      }
+    } else {
+      result = false
+    }
+
+    debug('_parseVarByteNum: result: %o', result)
+    return result
+  }
+
+  _parseByte () {
+    let result
+    if (this._pos < this._list.length) {
+      result = this._list.readUInt8(this._pos)
+      this._pos++
+    }
+    debug('_parseByte: result: %o', result)
+    return result
+  }
+
+  _parseByType (type) {
+    debug('_parseByType: type: %s', type)
+    switch (type) {
+      case 'byte': {
+        return this._parseByte() !== 0
+      }
+      case 'int8': {
+        return this._parseByte()
+      }
+      case 'int16': {
+        return this._parseNum()
+      }
+      case 'int32': {
+        return this._parse4ByteNum()
+      }
+      case 'var': {
+        return this._parseVarByteNum()
+      }
+      case 'string': {
+        return this._parseString()
+      }
+      case 'pair': {
+        return this._parseStringPair()
+      }
+      case 'binary': {
+        return this._parseBuffer()
+      }
+    }
+  }
+
+  _parseProperties () {
+    debug('_parseProperties')
+    const length = this._parseVarByteNum()
+    const start = this._pos
+    const end = start + length
+    const result = {}
+    while (this._pos < end) {
+      const type = this._parseByte()
+      if (!type) {
+        this._emitError(new Error('Cannot parse property code type'))
+        return false
+      }
+      const name = constants.propertiesCodes[type]
+      if (!name) {
+        this._emitError(new Error('Unknown property'))
+        return false
+      }
+      // user properties process
+      if (name === 'userProperties') {
+        if (!result[name]) {
+          result[name] = Object.create(null)
+        }
+        const currentUserProperty = this._parseByType(constants.propertiesTypes[name])
+        if (result[name][currentUserProperty.name]) {
+          if (Array.isArray(result[name][currentUserProperty.name])) {
+            result[name][currentUserProperty.name].push(currentUserProperty.value)
+          } else {
+            const currentValue = result[name][currentUserProperty.name]
+            result[name][currentUserProperty.name] = [currentValue]
+            result[name][currentUserProperty.name].push(currentUserProperty.value)
+          }
+        } else {
+          result[name][currentUserProperty.name] = currentUserProperty.value
+        }
+        continue
+      }
+      if (result[name]) {
+        if (Array.isArray(result[name])) {
+          result[name].push(this._parseByType(constants.propertiesTypes[name]))
+        } else {
+          result[name] = [result[name]]
+          result[name].push(this._parseByType(constants.propertiesTypes[name]))
+        }
+      } else {
+        result[name] = this._parseByType(constants.propertiesTypes[name])
+      }
+    }
+    return result
+  }
+
+  _newPacket () {
+    debug('_newPacket')
+    if (this.packet) {
+      this._list.consume(this.packet.length)
+      debug('_newPacket: parser emit packet: packet.cmd: %s, packet.payload: %s, packet.length: %d', this.packet.cmd, this.packet.payload, this.packet.length)
+      this.emit('packet', this.packet)
+    }
+    debug('_newPacket: new packet')
+    this.packet = new Packet()
+
+    this._pos = 0
+
+    return true
+  }
+
+  _emitError (err) {
+    debug('_emitError')
+    this.error = err
+    this.emit('error', err)
+  }
+}
+
+module.exports = Parser
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/test.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/test.js
new file mode 100644
index 0000000..32cb91e
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/test.js
@@ -0,0 +1,3148 @@
+const util = require('util')
+
+const test = require('tape')
+const mqtt = require('./')
+const WS = require('readable-stream').Writable
+
+function normalExpectedObject (object) {
+  if (object.username != null) object.username = object.username.toString()
+  if (object.password != null) object.password = Buffer.from(object.password)
+  return object
+}
+
+function testParseGenerate (name, object, buffer, opts) {
+  test(`${name} parse`, t => {
+    t.plan(2)
+
+    const parser = mqtt.parser(opts)
+    const expected = object
+    const fixture = buffer
+
+    parser.on('packet', packet => {
+      if (packet.cmd !== 'publish') {
+        delete packet.topic
+        delete packet.payload
+      }
+      t.deepLooseEqual(packet, normalExpectedObject(expected), 'expected packet')
+    })
+
+    parser.on('error', err => {
+      t.fail(err)
+    })
+
+    t.equal(parser.parse(fixture), 0, 'remaining bytes')
+  })
+
+  test(`${name} generate`, t => {
+    // For really large buffers, the expanded hex string can be so long as to
+    // generate an error in nodejs 14.x, so only do the test with extra output
+    // for relatively small buffers.
+    const bigLength = 10000
+    const generatedBuffer = mqtt.generate(object, opts)
+    if (generatedBuffer.length < bigLength && buffer.length < bigLength) {
+      t.equal(generatedBuffer.toString('hex'), buffer.toString('hex'))
+    } else {
+      const bufferOkay = generatedBuffer.equals(buffer)
+      if (bufferOkay) {
+        t.pass()
+      } else {
+        // Output abbreviated representations of the buffers.
+        t.comment('Expected:\n' + util.inspect(buffer))
+        t.comment('Got:\n' + util.inspect(generatedBuffer))
+        t.fail('Large buffers not equal')
+      }
+    }
+    t.end()
+  })
+
+  test(`${name} mirror`, t => {
+    t.plan(2)
+
+    const parser = mqtt.parser(opts)
+    const expected = object
+    const fixture = mqtt.generate(object, opts)
+
+    parser.on('packet', packet => {
+      if (packet.cmd !== 'publish') {
+        delete packet.topic
+        delete packet.payload
+      }
+      t.deepLooseEqual(packet, normalExpectedObject(expected), 'expected packet')
+    })
+
+    parser.on('error', err => {
+      t.fail(err)
+    })
+
+    t.equal(parser.parse(fixture), 0, 'remaining bytes')
+  })
+
+  test(`${name} writeToStream`, t => {
+    const stream = WS()
+    stream.write = () => true
+    stream.on('error', (err) => t.fail(err))
+
+    const result = mqtt.writeToStream(object, stream, opts)
+    t.equal(result, true, 'should return true')
+    t.end()
+  })
+}
+
+// the API allows to pass strings as buffers to writeToStream and generate
+// parsing them back will result in a string so only generate and compare to buffer
+function testGenerateOnly (name, object, buffer, opts) {
+  test(name, t => {
+    t.equal(mqtt.generate(object, opts).toString('hex'), buffer.toString('hex'))
+    t.end()
+  })
+}
+
+function testParseOnly (name, object, buffer, opts) {
+  test(name, t => {
+    const parser = mqtt.parser(opts)
+    // const expected = object
+    // const fixture = buffer
+
+    t.plan(2 + Object.keys(object).length)
+
+    parser.on('packet', packet => {
+      t.equal(Object.keys(object).length, Object.keys(packet).length, 'key count')
+      Object.keys(object).forEach(key => {
+        t.deepEqual(packet[key], object[key], `expected packet property ${key}`)
+      })
+    })
+
+    t.equal(parser.parse(buffer), 0, 'remaining bytes')
+    t.end()
+  })
+}
+
+function testParseError (expected, fixture, opts) {
+  test(expected, t => {
+    t.plan(1)
+
+    const parser = mqtt.parser(opts)
+
+    parser.on('error', err => {
+      t.equal(err.message, expected, 'expected error message')
+    })
+
+    parser.on('packet', () => {
+      t.fail('parse errors should not be followed by packet events')
+    })
+
+    parser.parse(fixture)
+    t.end()
+  })
+}
+
+function testGenerateError (expected, fixture, opts, name) {
+  test(name || expected, t => {
+    t.plan(1)
+
+    try {
+      mqtt.generate(fixture, opts)
+    } catch (err) {
+      t.equal(expected, err.message)
+    }
+    t.end()
+  })
+}
+
+function testGenerateErrorMultipleCmds (cmds, expected, fixture, opts) {
+  cmds.forEach(cmd => {
+    const obj = Object.assign({}, fixture)
+    obj.cmd = cmd
+    testGenerateError(expected, obj, opts, `${expected} on ${cmd}`)
+  }
+  )
+}
+
+function testParseGenerateDefaults (name, object, buffer, generated, opts) {
+  testParseOnly(`${name} parse`, generated, buffer, opts)
+  testGenerateOnly(`${name} generate`, object, buffer, opts)
+}
+
+function testParseAndGenerate (name, object, buffer, opts) {
+  testParseOnly(`${name} parse`, object, buffer, opts)
+  testGenerateOnly(`${name} generate`, object, buffer, opts)
+}
+
+function testWriteToStreamError (expected, fixture) {
+  test(`writeToStream ${expected} error`, t => {
+    t.plan(2)
+
+    const stream = WS()
+
+    stream.write = () => t.fail('should not have called write')
+    stream.on('error', () => t.pass('error emitted'))
+
+    const result = mqtt.writeToStream(fixture, stream)
+
+    t.false(result, 'result should be false')
+    t.end()
+  })
+}
+
+test('cacheNumbers get/set/unset', t => {
+  t.true(mqtt.writeToStream.cacheNumbers, 'initial state of cacheNumbers is enabled')
+  mqtt.writeToStream.cacheNumbers = false
+  t.false(mqtt.writeToStream.cacheNumbers, 'cacheNumbers can be disabled')
+  mqtt.writeToStream.cacheNumbers = true
+  t.true(mqtt.writeToStream.cacheNumbers, 'cacheNumbers can be enabled')
+  t.end()
+})
+
+test('disabled numbers cache', t => {
+  const stream = WS()
+  const message = {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 10,
+    topic: Buffer.from('test'),
+    payload: Buffer.from('test')
+  }
+  const expected = Buffer.from([
+    48, 10, // Header
+    0, 4, // Topic length
+    116, 101, 115, 116, // Topic (test)
+    116, 101, 115, 116 // Payload (test)
+  ])
+  let written = Buffer.alloc(0)
+
+  stream.write = (chunk) => {
+    written = Buffer.concat([written, chunk])
+  }
+  mqtt.writeToStream.cacheNumbers = false
+
+  mqtt.writeToStream(message, stream)
+
+  t.deepEqual(written, expected, 'written buffer is expected')
+
+  mqtt.writeToStream.cacheNumbers = true
+
+  stream.end()
+  t.end()
+})
+
+testGenerateError('Unknown command', {})
+
+testParseError('Not supported', Buffer.from([0, 1, 0]), {})
+
+// Length header field
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 255]
+), {})
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 128]
+), {})
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 255, 1]
+), {})
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 255, 127]
+), {})
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 255, 128]
+), {})
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 255, 255, 1]
+), {})
+
+testParseGenerate('minimal connect', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 18,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: false,
+  keepalive: 30,
+  clientId: 'test'
+}, Buffer.from([
+  16, 18, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  0, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+testGenerateOnly('minimal connect with clientId as Buffer', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 18,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: false,
+  keepalive: 30,
+  clientId: Buffer.from('test')
+}, Buffer.from([
+  16, 18, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  0, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+testParseGenerate('connect MQTT bridge 131', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 18,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  bridgeMode: true,
+  clean: false,
+  keepalive: 30,
+  clientId: 'test'
+}, Buffer.from([
+  16, 18, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  131, // Protocol version
+  0, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+testParseGenerate('connect MQTT bridge 132', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 18,
+  protocolId: 'MQIsdp',
+  protocolVersion: 4,
+  bridgeMode: true,
+  clean: false,
+  keepalive: 30,
+  clientId: 'test'
+}, Buffer.from([
+  16, 18, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  132, // Protocol version
+  0, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+testParseGenerate('connect MQTT 5', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 125,
+  protocolId: 'MQTT',
+  protocolVersion: 5,
+  will: {
+    retain: true,
+    qos: 2,
+    properties: {
+      willDelayInterval: 1234,
+      payloadFormatIndicator: false,
+      messageExpiryInterval: 4321,
+      contentType: 'test',
+      responseTopic: 'topic',
+      correlationData: Buffer.from([1, 2, 3, 4]),
+      userProperties: {
+        test: 'test'
+      }
+    },
+    topic: 'topic',
+    payload: Buffer.from([4, 3, 2, 1])
+  },
+  clean: true,
+  keepalive: 30,
+  properties: {
+    sessionExpiryInterval: 1234,
+    receiveMaximum: 432,
+    maximumPacketSize: 100,
+    topicAliasMaximum: 456,
+    requestResponseInformation: true,
+    requestProblemInformation: true,
+    userProperties: {
+      test: 'test'
+    },
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([1, 2, 3, 4])
+  },
+  clientId: 'test'
+}, Buffer.from([
+  16, 125, // Header
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // Protocol ID
+  5, // Protocol version
+  54, // Connect flags
+  0, 30, // Keepalive
+  47, // properties length
+  17, 0, 0, 4, 210, // sessionExpiryInterval
+  33, 1, 176, // receiveMaximum
+  39, 0, 0, 0, 100, // maximumPacketSize
+  34, 1, 200, // topicAliasMaximum
+  25, 1, // requestResponseInformation
+  23, 1, // requestProblemInformation,
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties,
+  21, 0, 4, 116, 101, 115, 116, // authenticationMethod
+  22, 0, 4, 1, 2, 3, 4, // authenticationData
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  47, // will properties
+  24, 0, 0, 4, 210, // will delay interval
+  1, 0, // payload format indicator
+  2, 0, 0, 16, 225, // message expiry interval
+  3, 0, 4, 116, 101, 115, 116, // content type
+  8, 0, 5, 116, 111, 112, 105, 99, // response topic
+  9, 0, 4, 1, 2, 3, 4, // corelation data
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // user properties
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 4, // Will payload length
+  4, 3, 2, 1// Will payload
+]))
+
+testParseGenerate('connect MQTT 5 with will properties but with empty will payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 121,
+  protocolId: 'MQTT',
+  protocolVersion: 5,
+  will: {
+    retain: true,
+    qos: 2,
+    properties: {
+      willDelayInterval: 1234,
+      payloadFormatIndicator: false,
+      messageExpiryInterval: 4321,
+      contentType: 'test',
+      responseTopic: 'topic',
+      correlationData: Buffer.from([1, 2, 3, 4]),
+      userProperties: {
+        test: 'test'
+      }
+    },
+    topic: 'topic',
+    payload: Buffer.from([])
+  },
+  clean: true,
+  keepalive: 30,
+  properties: {
+    sessionExpiryInterval: 1234,
+    receiveMaximum: 432,
+    maximumPacketSize: 100,
+    topicAliasMaximum: 456,
+    requestResponseInformation: true,
+    requestProblemInformation: true,
+    userProperties: {
+      test: 'test'
+    },
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([1, 2, 3, 4])
+  },
+  clientId: 'test'
+}, Buffer.from([
+  16, 121, // Header
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // Protocol ID
+  5, // Protocol version
+  54, // Connect flags
+  0, 30, // Keepalive
+  47, // properties length
+  17, 0, 0, 4, 210, // sessionExpiryInterval
+  33, 1, 176, // receiveMaximum
+  39, 0, 0, 0, 100, // maximumPacketSize
+  34, 1, 200, // topicAliasMaximum
+  25, 1, // requestResponseInformation
+  23, 1, // requestProblemInformation,
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties,
+  21, 0, 4, 116, 101, 115, 116, // authenticationMethod
+  22, 0, 4, 1, 2, 3, 4, // authenticationData
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  47, // will properties
+  24, 0, 0, 4, 210, // will delay interval
+  1, 0, // payload format indicator
+  2, 0, 0, 16, 225, // message expiry interval
+  3, 0, 4, 116, 101, 115, 116, // content type
+  8, 0, 5, 116, 111, 112, 105, 99, // response topic
+  9, 0, 4, 1, 2, 3, 4, // corelation data
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // user properties
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 0 // Will payload length
+]))
+
+testParseGenerate('connect MQTT 5 w/o will properties', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 78,
+  protocolId: 'MQTT',
+  protocolVersion: 5,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: Buffer.from([4, 3, 2, 1])
+  },
+  clean: true,
+  keepalive: 30,
+  properties: {
+    sessionExpiryInterval: 1234,
+    receiveMaximum: 432,
+    maximumPacketSize: 100,
+    topicAliasMaximum: 456,
+    requestResponseInformation: true,
+    requestProblemInformation: true,
+    userProperties: {
+      test: 'test'
+    },
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([1, 2, 3, 4])
+  },
+  clientId: 'test'
+}, Buffer.from([
+  16, 78, // Header
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // Protocol ID
+  5, // Protocol version
+  54, // Connect flags
+  0, 30, // Keepalive
+  47, // properties length
+  17, 0, 0, 4, 210, // sessionExpiryInterval
+  33, 1, 176, // receiveMaximum
+  39, 0, 0, 0, 100, // maximumPacketSize
+  34, 1, 200, // topicAliasMaximum
+  25, 1, // requestResponseInformation
+  23, 1, // requestProblemInformation,
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties,
+  21, 0, 4, 116, 101, 115, 116, // authenticationMethod
+  22, 0, 4, 1, 2, 3, 4, // authenticationData
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, // will properties
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 4, // Will payload length
+  4, 3, 2, 1// Will payload
+]))
+
+testParseGenerate('no clientId with 3.1.1', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 12,
+  protocolId: 'MQTT',
+  protocolVersion: 4,
+  clean: true,
+  keepalive: 30,
+  clientId: ''
+}, Buffer.from([
+  16, 12, // Header
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // Protocol ID
+  4, // Protocol version
+  2, // Connect flags
+  0, 30, // Keepalive
+  0, 0 // Client ID length
+]))
+
+testParseGenerateDefaults('no clientId with 5.0', {
+  cmd: 'connect',
+  protocolId: 'MQTT',
+  protocolVersion: 5,
+  clean: true,
+  keepalive: 60,
+  properties:
+  {
+    receiveMaximum: 20
+  },
+  clientId: ''
+}, Buffer.from(
+  [16, 16, 0, 4, 77, 81, 84, 84, 5, 2, 0, 60, 3, 33, 0, 20, 0, 0]
+), {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 16,
+  topic: null,
+  payload: null,
+  protocolId: 'MQTT',
+  protocolVersion: 5,
+  clean: true,
+  keepalive: 60,
+  properties: {
+    receiveMaximum: 20
+  },
+  clientId: ''
+}, { protocolVersion: 5 })
+
+testParseGenerateDefaults('utf-8 clientId with 5.0', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 23,
+  protocolId: 'MQTT',
+  protocolVersion: 4,
+  clean: true,
+  keepalive: 30,
+  clientId: 'Ŧėśt🜄'
+}, Buffer.from([
+  16, 23, // Header
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // Protocol ID
+  4, // Protocol version
+  2, // Connect flags
+  0, 30, // Keepalive
+  0, 11, // Client ID length
+  197, 166, // Ŧ (UTF-8: 0xc5a6)
+  196, 151, // ė (UTF-8: 0xc497)
+  197, 155, // ś (utf-8: 0xc59b)
+  116, // t (utf-8: 0x74)
+  240, 159, 156, 132 // 🜄 (utf-8: 0xf09f9c84)
+]), {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 23,
+  topic: null,
+  payload: null,
+  protocolId: 'MQTT',
+  protocolVersion: 4,
+  clean: true,
+  keepalive: 30,
+  clientId: 'Ŧėśt🜄'
+}, { protocol: 5 })
+
+testParseGenerateDefaults('default connect', {
+  cmd: 'connect',
+  clientId: 'test'
+}, Buffer.from([
+  16, 16, 0, 4, 77, 81, 84,
+  84, 4, 2, 0, 0,
+  0, 4, 116, 101, 115, 116
+]), {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 16,
+  topic: null,
+  payload: null,
+  protocolId: 'MQTT',
+  protocolVersion: 4,
+  clean: true,
+  keepalive: 0,
+  clientId: 'test'
+})
+
+testParseAndGenerate('Version 4 CONACK', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  topic: null,
+  payload: null,
+  sessionPresent: false,
+  returnCode: 1
+}, Buffer.from([
+  32, 2, // Fixed Header (CONNACK, Remaining Length)
+  0, 1 // Variable Header (Session not present, Connection Refused - unacceptable protocol version)
+]), {}) // Default protocolVersion (4)
+
+testParseAndGenerate('Version 5 CONACK', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 3,
+  topic: null,
+  payload: null,
+  sessionPresent: false,
+  reasonCode: 140
+}, Buffer.from([
+  32, 3, // Fixed Header (CONNACK, Remaining Length)
+  0, 140, // Variable Header (Session not present, Bad authentication method)
+  0 // Property Length Zero
+]), { protocolVersion: 5 })
+
+testParseOnly('Version 4 CONACK in Version 5 mode', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  topic: null,
+  payload: null,
+  sessionPresent: false,
+  reasonCode: 1 // a version 4 return code stored in the version 5 reasonCode because this client is in version 5
+}, Buffer.from([
+  32, 2, // Fixed Header (CONNACK, Remaining Length)
+  0, 1 // Variable Header (Session not present, Connection Refused - unacceptable protocol version)
+]), { protocolVersion: 5 }) // message is in version 4 format, but this client is in version 5 mode
+
+testParseOnly('Version 5 PUBACK test 1', {
+  cmd: 'puback',
+  messageId: 42,
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  64, 2, // Fixed Header (PUBACK, Remaining Length)
+  0, 42 // Variable Header (2 Bytes: Packet Identifier 42, Implied Reason code: Success, Implied no properties)
+]), { protocolVersion: 5 }
+)
+
+testParseAndGenerate('Version 5 PUBACK test 2', {
+  cmd: 'puback',
+  messageId: 42,
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 3,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  64, 3, // Fixed Header (PUBACK, Remaining Length)
+  0, 42, 0 // Variable Header (2 Bytes: Packet Identifier 42, Reason code: 0 Success, Implied no properties)
+]), { protocolVersion: 5 }
+)
+
+testParseOnly('Version 5 PUBACK test 3', {
+  cmd: 'puback',
+  messageId: 42,
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 4,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  64, 4, // Fixed Header (PUBACK, Remaining Length)
+  0, 42, 0, // Variable Header (2 Bytes: Packet Identifier 42, Reason code: 0 Success)
+  0 // no properties
+]), { protocolVersion: 5 }
+)
+
+testParseOnly('Version 5 CONNACK test 1', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 1,
+  topic: null,
+  payload: null,
+  sessionPresent: true,
+  reasonCode: 0
+}, Buffer.from([
+  32, 1, // Fixed Header (CONNACK, Remaining Length)
+  1 // Variable Header (Session Present: 1 => true, Implied Reason code: Success, Implied no properties)
+]), { protocolVersion: 5 }
+)
+
+testParseOnly('Version 5 CONNACK test 2', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  topic: null,
+  payload: null,
+  sessionPresent: true,
+  reasonCode: 0
+}, Buffer.from([
+  32, 2, // Fixed Header (CONNACK, Remaining Length)
+  1, 0 // Variable Header (Session Present: 1 => true, Connect Reason code: Success, Implied no properties)
+]), { protocolVersion: 5 }
+)
+
+testParseAndGenerate('Version 5 CONNACK test 3', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 3,
+  topic: null,
+  payload: null,
+  sessionPresent: true,
+  reasonCode: 0
+}, Buffer.from([
+  32, 3, // Fixed Header (CONNACK, Remaining Length)
+  1, 0, // Variable Header (Session Present: 1 => true, Connect Reason code: Success)
+  0 // no properties
+]), { protocolVersion: 5 }
+)
+
+testParseOnly('Version 5 DISCONNECT test 1', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 0,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  224, 0 // Fixed Header (DISCONNECT, Remaining Length), Implied Reason code: Normal Disconnection
+]), { protocolVersion: 5 }
+)
+
+testParseOnly('Version 5 DISCONNECT test 2', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 1,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  224, 1, // Fixed Header (DISCONNECT, Remaining Length)
+  0 // reason Code (Normal disconnection)
+]), { protocolVersion: 5 }
+)
+
+testParseAndGenerate('Version 5 DISCONNECT test 3', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  224, 2, // Fixed Header (DISCONNECT, Remaining Length)
+  0, // reason Code (Normal disconnection)
+  0 // no properties
+]), { protocolVersion: 5 }
+)
+
+testParseGenerate('empty will payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 47,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: Buffer.alloc(0)
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: Buffer.from('password')
+}, Buffer.from([
+  16, 47, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 0, // Will payload length
+  // Will payload
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username
+  0, 8, // Password length
+  112, 97, 115, 115, 119, 111, 114, 100 // Password
+]))
+
+testParseGenerate('empty buffer username payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 20,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: Buffer.from('')
+}, Buffer.from([
+  16, 20, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  130, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 0 // Username length
+  // Empty Username payload
+]))
+
+testParseGenerate('empty string username payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 20,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: ''
+}, Buffer.from([
+  16, 20, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  130, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 0 // Username length
+  // Empty Username payload
+]))
+
+testParseGenerate('empty buffer password payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 30,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: Buffer.from('')
+}, Buffer.from([
+  16, 30, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  194, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username payload
+  0, 0 // Password length
+  // Empty password payload
+]))
+
+testParseGenerate('empty string password payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 30,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: ''
+}, Buffer.from([
+  16, 30, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  194, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username payload
+  0, 0 // Password length
+  // Empty password payload
+]))
+
+testParseGenerate('empty string username and password payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 22,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: '',
+  password: Buffer.from('')
+}, Buffer.from([
+  16, 22, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  194, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 0, // Username length
+  // Empty Username payload
+  0, 0 // Password length
+  // Empty password payload
+]))
+
+testParseGenerate('maximal connect', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: Buffer.from('payload')
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: Buffer.from('password')
+}, Buffer.from([
+  16, 54, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 7, // Will payload length
+  112, 97, 121, 108, 111, 97, 100, // Will payload
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username
+  0, 8, // Password length
+  112, 97, 115, 115, 119, 111, 114, 100 // Password
+]))
+
+testParseGenerate('max connect with special chars', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 57,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'tòpic',
+    payload: Buffer.from('pay£oad')
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'te$t',
+  username: 'u$ern4me',
+  password: Buffer.from('p4$$w0£d')
+}, Buffer.from([
+  16, 57, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 36, 116, // Client ID
+  0, 6, // Will topic length
+  116, 195, 178, 112, 105, 99, // Will topic
+  0, 8, // Will payload length
+  112, 97, 121, 194, 163, 111, 97, 100, // Will payload
+  0, 8, // Username length
+  117, 36, 101, 114, 110, 52, 109, 101, // Username
+  0, 9, // Password length
+  112, 52, 36, 36, 119, 48, 194, 163, 100 // Password
+]))
+
+testGenerateOnly('connect all strings generate', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+}, Buffer.from([
+  16, 54, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 7, // Will payload length
+  112, 97, 121, 108, 111, 97, 100, // Will payload
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username
+  0, 8, // Password length
+  112, 97, 115, 115, 119, 111, 114, 100 // Password
+]))
+
+testParseError('Cannot parse protocolId', Buffer.from([
+  16, 4,
+  0, 6,
+  77, 81
+]))
+
+// missing protocol version on connect
+testParseError('Packet too short', Buffer.from([
+  16, 8, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112 // Protocol ID
+]))
+
+// missing keepalive on connect
+testParseError('Packet too short', Buffer.from([
+  16, 10, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246 // Connect flags
+]))
+
+// missing clientid on connect
+testParseError('Packet too short', Buffer.from([
+  16, 10, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// missing will topic on connect
+testParseError('Cannot parse will topic', Buffer.from([
+  16, 16, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 2, // Will topic length
+  0, 0 // Will topic
+]))
+
+// missing will payload on connect
+testParseError('Cannot parse will payload', Buffer.from([
+  16, 23, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 2, // Will payload length
+  0, 0 // Will payload
+]))
+
+// missing username on connect
+testParseError('Cannot parse username', Buffer.from([
+  16, 32, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 7, // Will payload length
+  112, 97, 121, 108, 111, 97, 100, // Will payload
+  0, 2, // Username length
+  0, 0 // Username
+]))
+
+// missing password on connect
+testParseError('Cannot parse password', Buffer.from([
+  16, 42, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 7, // Will payload length
+  112, 97, 121, 108, 111, 97, 100, // Will payload
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username
+  0, 2, // Password length
+  0, 0 // Password
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for connect packet', Buffer.from([
+  18, 10, // Header
+  0, 4, // Protocol ID length
+  0x4d, 0x51, 0x54, 0x54, // Protocol ID
+  3, // Protocol version
+  2, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// The Server MUST validate that the reserved flag in the CONNECT Control Packet is set to zero and disconnect the Client if it is not zero [MQTT-3.1.2-3]
+testParseError('Connect flag bit 0 must be 0, but got 1', Buffer.from([
+  16, 10, // Header
+  0, 4, // Protocol ID length
+  0x4d, 0x51, 0x54, 0x54, // Protocol ID
+  3, // Protocol version
+  3, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// If the Will Flag is set to 0 the Will QoS and Will Retain fields in the Connect Flags MUST be set to zero and the Will Topic and Will Message fields MUST NOT be present in the payload [MQTT-3.1.2-11].
+testParseError('Will Retain Flag must be set to zero when Will Flag is set to 0', Buffer.from([
+  16, 10, // Header
+  0, 4, // Protocol ID length
+  0x4d, 0x51, 0x54, 0x54, // Protocol ID
+  3, // Protocol version
+  0x22, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// If the Will Flag is set to 0 the Will QoS and Will Retain fields in the Connect Flags MUST be set to zero and the Will Topic and Will Message fields MUST NOT be present in the payload [MQTT-3.1.2-11].
+testParseError('Will QoS must be set to zero when Will Flag is set to 0', Buffer.from([
+  16, 10, // Header
+  0, 4, // Protocol ID length
+  0x4d, 0x51, 0x54, 0x54, // Protocol ID
+  3, // Protocol version
+  0x12, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// If the Will Flag is set to 0 the Will QoS and Will Retain fields in the Connect Flags MUST be set to zero and the Will Topic and Will Message fields MUST NOT be present in the payload [MQTT-3.1.2-11].
+testParseError('Will QoS must be set to zero when Will Flag is set to 0', Buffer.from([
+  16, 10, // Header
+  0, 4, // Protocol ID length
+  0x4d, 0x51, 0x54, 0x54, // Protocol ID
+  3, // Protocol version
+  0xa, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// CONNECT, SUBSCRIBE, SUBACK, UNSUBSCRIBE, UNSUBACK (v.5) packets must have payload
+// CONNECT
+testParseError('Packet too short', Buffer.from([
+  16, // Header
+  8, // Packet length
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // MQTT
+  5, // Version
+  2, // Clean Start enabled
+  0, 0, // Keep-Alive
+  0, // Property Length
+  0, 0 // Properties
+  // No payload
+]), { protocolVersion: 5 })
+// SUBSCRIBE
+testParseError('Malformed subscribe, no payload specified', Buffer.from([
+  130, // Header
+  0 // Packet length
+]), { protocolVersion: 5 })
+// SUBACK
+testParseError('Malformed suback, no payload specified', Buffer.from([
+  144, // Header
+  0 // Packet length
+]), { protocolVersion: 5 })
+// UNSUBSCRIBE
+testParseError('Malformed unsubscribe, no payload specified', Buffer.from([
+  162, // Header
+  0 // Packet length
+]), { protocolVersion: 5 })
+// UNSUBACK (v.5)
+testParseError('Malformed unsuback, no payload specified', Buffer.from([
+  176, // Header
+  0 // Packet length
+]), { protocolVersion: 5 })
+// UNSUBACK (v.4)
+testParseError('Malformed unsuback, payload length must be 2', Buffer.from([
+  176, // Header
+  1, // Packet length
+  1
+]), { protocolVersion: 4 })
+// UNSUBACK (v.3)
+testParseError('Malformed unsuback, payload length must be 2', Buffer.from([
+  176, // Header
+  1, // Packet length
+  1
+]), { protocolVersion: 3 })
+
+testParseGenerate('connack with return code 0', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  sessionPresent: false,
+  returnCode: 0
+}, Buffer.from([
+  32, 2, 0, 0
+]))
+
+testParseGenerate('connack MQTT 5 with properties', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 87,
+  sessionPresent: false,
+  reasonCode: 0,
+  properties: {
+    sessionExpiryInterval: 1234,
+    receiveMaximum: 432,
+    maximumQoS: 2,
+    retainAvailable: true,
+    maximumPacketSize: 100,
+    assignedClientIdentifier: 'test',
+    topicAliasMaximum: 456,
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    },
+    wildcardSubscriptionAvailable: true,
+    subscriptionIdentifiersAvailable: true,
+    sharedSubscriptionAvailable: false,
+    serverKeepAlive: 1234,
+    responseInformation: 'test',
+    serverReference: 'test',
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([1, 2, 3, 4])
+  }
+}, Buffer.from([
+  32, 87, 0, 0,
+  84, // properties length
+  17, 0, 0, 4, 210, // sessionExpiryInterval
+  33, 1, 176, // receiveMaximum
+  36, 2, // Maximum qos
+  37, 1, // retainAvailable
+  39, 0, 0, 0, 100, // maximumPacketSize
+  18, 0, 4, 116, 101, 115, 116, // assignedClientIdentifier
+  34, 1, 200, // topicAliasMaximum
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  40, 1, // wildcardSubscriptionAvailable
+  41, 1, // subscriptionIdentifiersAvailable
+  42, 0, // sharedSubscriptionAvailable
+  19, 4, 210, // serverKeepAlive
+  26, 0, 4, 116, 101, 115, 116, // responseInformation
+  28, 0, 4, 116, 101, 115, 116, // serverReference
+  21, 0, 4, 116, 101, 115, 116, // authenticationMethod
+  22, 0, 4, 1, 2, 3, 4 // authenticationData
+]), { protocolVersion: 5 })
+
+testParseGenerate('connack MQTT 5 with properties and doubled user properties', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 100,
+  sessionPresent: false,
+  reasonCode: 0,
+  properties: {
+    sessionExpiryInterval: 1234,
+    receiveMaximum: 432,
+    maximumQoS: 2,
+    retainAvailable: true,
+    maximumPacketSize: 100,
+    assignedClientIdentifier: 'test',
+    topicAliasMaximum: 456,
+    reasonString: 'test',
+    userProperties: {
+      test: ['test', 'test']
+    },
+    wildcardSubscriptionAvailable: true,
+    subscriptionIdentifiersAvailable: true,
+    sharedSubscriptionAvailable: false,
+    serverKeepAlive: 1234,
+    responseInformation: 'test',
+    serverReference: 'test',
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([1, 2, 3, 4])
+  }
+}, Buffer.from([
+  32, 100, 0, 0,
+  97, // properties length
+  17, 0, 0, 4, 210, // sessionExpiryInterval
+  33, 1, 176, // receiveMaximum
+  36, 2, // Maximum qos
+  37, 1, // retainAvailable
+  39, 0, 0, 0, 100, // maximumPacketSize
+  18, 0, 4, 116, 101, 115, 116, // assignedClientIdentifier
+  34, 1, 200, // topicAliasMaximum
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116,
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  40, 1, // wildcardSubscriptionAvailable
+  41, 1, // subscriptionIdentifiersAvailable
+  42, 0, // sharedSubscriptionAvailable
+  19, 4, 210, // serverKeepAlive
+  26, 0, 4, 116, 101, 115, 116, // responseInformation
+  28, 0, 4, 116, 101, 115, 116, // serverReference
+  21, 0, 4, 116, 101, 115, 116, // authenticationMethod
+  22, 0, 4, 1, 2, 3, 4 // authenticationData
+]), { protocolVersion: 5 })
+
+testParseGenerate('connack with return code 0 session present bit set', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  sessionPresent: true,
+  returnCode: 0
+}, Buffer.from([
+  32, 2, 1, 0
+]))
+
+testParseGenerate('connack with return code 5', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  sessionPresent: false,
+  returnCode: 5
+}, Buffer.from([
+  32, 2, 0, 5
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for connack packet', Buffer.from([
+  33, 2, // header
+  0, // flags
+  5 // return code
+]))
+
+// Byte 1 is the "Connect Acknowledge Flags". Bits 7-1 are reserved and MUST be set to 0 [MQTT-3.2.2-1].
+testParseError('Invalid connack flags, bits 7-1 must be set to 0', Buffer.from([
+  32, 2, // header
+  2, // flags
+  5 // return code
+]))
+
+testGenerateError('Invalid return code', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  sessionPresent: false,
+  returnCode: '5' // returncode must be a number
+})
+
+testParseGenerate('minimal publish', {
+  cmd: 'publish',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 10,
+  topic: 'test',
+  payload: Buffer.from('test')
+}, Buffer.from([
+  48, 10, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  116, 101, 115, 116 // Payload (test)
+]))
+
+testParseGenerate('publish MQTT 5 properties', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 86,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: true,
+    messageExpiryInterval: 4321,
+    topicAlias: 100,
+    responseTopic: 'topic',
+    correlationData: Buffer.from([1, 2, 3, 4]),
+    userProperties: {
+      test: ['test', 'test', 'test']
+    },
+    subscriptionIdentifier: 120,
+    contentType: 'test'
+  }
+}, Buffer.from([
+  61, 86, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  0, 10, // Message ID
+  73, // properties length
+  1, 1, // payloadFormatIndicator
+  2, 0, 0, 16, 225, // message expiry interval
+  35, 0, 100, // topicAlias
+  8, 0, 5, 116, 111, 112, 105, 99, // response topic
+  9, 0, 4, 1, 2, 3, 4, // correlationData
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  11, 120, // subscriptionIdentifier
+  3, 0, 4, 116, 101, 115, 116, // content type
+  116, 101, 115, 116 // Payload (test)
+]), { protocolVersion: 5 })
+
+testParseGenerate('publish MQTT 5 with multiple same properties', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 64,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: true,
+    messageExpiryInterval: 4321,
+    topicAlias: 100,
+    responseTopic: 'topic',
+    correlationData: Buffer.from([1, 2, 3, 4]),
+    userProperties: {
+      test: 'test'
+    },
+    subscriptionIdentifier: [120, 121, 122],
+    contentType: 'test'
+  }
+}, Buffer.from([
+  61, 64, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  0, 10, // Message ID
+  51, // properties length
+  1, 1, // payloadFormatIndicator
+  2, 0, 0, 16, 225, // message expiry interval
+  35, 0, 100, // topicAlias
+  8, 0, 5, 116, 111, 112, 105, 99, // response topic
+  9, 0, 4, 1, 2, 3, 4, // correlationData
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  11, 120, // subscriptionIdentifier
+  11, 121, // subscriptionIdentifier
+  11, 122, // subscriptionIdentifier
+  3, 0, 4, 116, 101, 115, 116, // content type
+  116, 101, 115, 116 // Payload (test)
+]), { protocolVersion: 5 })
+
+testParseGenerate('publish MQTT 5 properties with 0-4 byte varbyte', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 27,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: false,
+    subscriptionIdentifier: [128, 16384, 2097152] // this tests the varbyte handling
+  }
+}, Buffer.from([
+  61, 27, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  0, 10, // Message ID
+  14, // properties length
+  1, 0, // payloadFormatIndicator
+  11, 128, 1, // subscriptionIdentifier
+  11, 128, 128, 1, // subscriptionIdentifier
+  11, 128, 128, 128, 1, // subscriptionIdentifier
+  116, 101, 115, 116 // Payload (test)
+]), { protocolVersion: 5 })
+
+testParseGenerate('publish MQTT 5 properties with max value varbyte', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 22,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: false,
+    subscriptionIdentifier: [1, 268435455]
+  }
+}, Buffer.from([
+  61, 22, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  0, 10, // Message ID
+  9, // properties length
+  1, 0, // payloadFormatIndicator
+  11, 1, // subscriptionIdentifier
+  11, 255, 255, 255, 127, // subscriptionIdentifier (max value)
+  116, 101, 115, 116 // Payload (test)
+]), { protocolVersion: 5 })
+
+; (() => {
+  const buffer = Buffer.alloc(2048)
+  testParseGenerate('2KB publish packet', {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 2054,
+    topic: 'test',
+    payload: buffer
+  }, Buffer.concat([Buffer.from([
+    48, 134, 16, // Header
+    0, 4, // Topic length
+    116, 101, 115, 116 // Topic (test)
+  ]), buffer]))
+})()
+
+; (() => {
+  const maxLength = 268435455
+  const buffer = Buffer.alloc(maxLength - 6)
+  testParseGenerate('Max payload publish packet', {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: maxLength,
+    topic: 'test',
+    payload: buffer
+  }, Buffer.concat([Buffer.from([
+    48, 255, 255, 255, 127, // Header
+    0, 4, // Topic length
+    116, 101, 115, 116 // Topic (test)
+  ]), buffer]))
+})()
+
+testParseGenerate('maximal publish', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  length: 12,
+  dup: true,
+  topic: 'test',
+  messageId: 10,
+  payload: Buffer.from('test')
+}, Buffer.from([
+  61, 12, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic
+  0, 10, // Message ID
+  116, 101, 115, 116 // Payload
+]))
+
+test('publish all strings generate', t => {
+  const message = {
+    cmd: 'publish',
+    retain: true,
+    qos: 2,
+    length: 12,
+    dup: true,
+    topic: 'test',
+    messageId: 10,
+    payload: Buffer.from('test')
+  }
+  const expected = Buffer.from([
+    61, 12, // Header
+    0, 4, // Topic length
+    116, 101, 115, 116, // Topic
+    0, 10, // Message ID
+    116, 101, 115, 116 // Payload
+  ])
+
+  t.equal(mqtt.generate(message).toString('hex'), expected.toString('hex'))
+  t.end()
+})
+
+testParseGenerate('empty publish', {
+  cmd: 'publish',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 6,
+  topic: 'test',
+  payload: Buffer.alloc(0)
+}, Buffer.from([
+  48, 6, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116 // Topic
+  // Empty payload
+]))
+
+// A PUBLISH Packet MUST NOT have both QoS bits set to 1. If a Server or Client receives a PUBLISH Packet which has both QoS bits set to 1 it MUST close the Network Connection [MQTT-3.3.1-4].
+testParseError('Packet must not have both QoS bits set to 1', Buffer.from([
+  0x36, 6, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116 // Topic
+  // Empty payload
+]))
+
+test('splitted publish parse', t => {
+  t.plan(3)
+
+  const parser = mqtt.parser()
+  const expected = {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 10,
+    topic: 'test',
+    payload: Buffer.from('test')
+  }
+
+  parser.on('packet', packet => {
+    t.deepLooseEqual(packet, expected, 'expected packet')
+  })
+
+  t.equal(parser.parse(Buffer.from([
+    48, 10, // Header
+    0, 4, // Topic length
+    116, 101, 115, 116 // Topic (test)
+  ])), 6, 'remaining bytes')
+
+  t.equal(parser.parse(Buffer.from([
+    116, 101, 115, 116 // Payload (test)
+  ])), 0, 'remaining bytes')
+})
+
+test('split publish longer', t => {
+  t.plan(3)
+
+  const length = 255
+  const topic = 'test'
+  // Minus two bytes for the topic length specifier
+  const payloadLength = length - topic.length - 2
+
+  const parser = mqtt.parser()
+  const expected = {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: length,
+    topic: topic,
+    payload: Buffer.from('a'.repeat(payloadLength))
+  }
+
+  parser.on('packet', packet => {
+    t.deepLooseEqual(packet, expected, 'expected packet')
+  })
+
+  t.equal(parser.parse(Buffer.from([
+    48, 255, 1, // Header
+    0, topic.length, // Topic length
+    116, 101, 115, 116 // Topic (test)
+  ])), 6, 'remaining bytes')
+
+  t.equal(parser.parse(Buffer.from(Array(payloadLength).fill(97))),
+    0, 'remaining bytes')
+})
+
+test('split length parse', t => {
+  t.plan(4)
+
+  const length = 255
+  const topic = 'test'
+  const payloadLength = length - topic.length - 2
+
+  const parser = mqtt.parser()
+  const expected = {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: length,
+    topic: topic,
+    payload: Buffer.from('a'.repeat(payloadLength))
+  }
+
+  parser.on('packet', packet => {
+    t.deepLooseEqual(packet, expected, 'expected packet')
+  })
+
+  t.equal(parser.parse(Buffer.from([
+    48, 255 // Header (partial length)
+  ])), 1, 'remaining bytes')
+
+  t.equal(parser.parse(Buffer.from([
+    1, // Rest of header length
+    0, topic.length, // Topic length
+    116, 101, 115, 116 // Topic (test)
+  ])), 6, 'remaining bytes')
+
+  t.equal(parser.parse(Buffer.from(Array(payloadLength).fill(97))),
+    0, 'remaining bytes')
+})
+
+testGenerateError('Invalid variable byte integer: 268435456', {
+  cmd: 'publish',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: (268435455 + 1),
+  topic: 'test',
+  payload: Buffer.alloc(268435455 + 1 - 6)
+}, {}, 'Length var byte integer over max allowed value throws error')
+
+testGenerateError('Invalid subscriptionIdentifier: 268435456', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 27,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: false,
+    subscriptionIdentifier: 268435456
+  }
+}, { protocolVersion: 5 }, 'MQTT 5.0 var byte integer >24 bits throws error')
+
+testParseGenerate('puback', {
+  cmd: 'puback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  messageId: 2
+}, Buffer.from([
+  64, 2, // Header
+  0, 2 // Message ID
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for puback packet', Buffer.from([
+  65, 2, // Header
+  0, 2 // Message ID
+]))
+
+testParseGenerate('puback with reason and no MQTT 5 properties', {
+  cmd: 'puback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 3,
+  messageId: 2,
+  reasonCode: 16
+}, Buffer.from([
+  64, 3, // Header
+  0, 2, // Message ID
+  16 // reason code
+]), { protocolVersion: 5 })
+
+testParseGenerate('puback MQTT 5 properties', {
+  cmd: 'puback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 24,
+  messageId: 2,
+  reasonCode: 16,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  64, 24, // Header
+  0, 2, // Message ID
+  16, // reason code
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]), { protocolVersion: 5 })
+
+testParseError('Invalid puback reason code', Buffer.from([
+  64, 4, // Header
+  0, 2, // Message ID
+  0x11, // reason code
+  0 // properties length
+]), { protocolVersion: 5 })
+
+testParseGenerate('pubrec', {
+  cmd: 'pubrec',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  messageId: 2
+}, Buffer.from([
+  80, 2, // Header
+  0, 2 // Message ID
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for pubrec packet', Buffer.from([
+  81, 2, // Header
+  0, 2 // Message ID
+]))
+
+testParseGenerate('pubrec MQTT 5 properties', {
+  cmd: 'pubrec',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 24,
+  messageId: 2,
+  reasonCode: 16,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  80, 24, // Header
+  0, 2, // Message ID
+  16, // reason code
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]), { protocolVersion: 5 })
+
+testParseGenerate('pubrel', {
+  cmd: 'pubrel',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 2,
+  messageId: 2
+}, Buffer.from([
+  98, 2, // Header
+  0, 2 // Message ID
+]))
+
+testParseError('Invalid pubrel reason code', Buffer.from([
+  98, 4, // Header
+  0, 2, // Message ID
+  0x11, // Reason code
+  0 // Properties length
+]), { protocolVersion: 5 })
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x2 for pubrel packet', Buffer.from([
+  96, 2, // Header
+  0, 2 // Message ID
+]))
+
+testParseGenerate('pubrel MQTT5 properties', {
+  cmd: 'pubrel',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 24,
+  messageId: 2,
+  reasonCode: 0x92,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  98, 24, // Header
+  0, 2, // Message ID
+  0x92, // reason code
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]), { protocolVersion: 5 })
+
+testParseError('Invalid pubrel reason code', Buffer.from([
+  98, 4, // Header
+  0, 2, // Message ID
+  16, // reason code
+  0 // properties length
+]), { protocolVersion: 5 })
+
+testParseGenerate('pubcomp', {
+  cmd: 'pubcomp',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  messageId: 2
+}, Buffer.from([
+  112, 2, // Header
+  0, 2 // Message ID
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for pubcomp packet', Buffer.from([
+  113, 2, // Header
+  0, 2 // Message ID
+]))
+
+testParseGenerate('pubcomp MQTT 5 properties', {
+  cmd: 'pubcomp',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 24,
+  messageId: 2,
+  reasonCode: 0x92,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  112, 24, // Header
+  0, 2, // Message ID
+  0x92, // reason code
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]), { protocolVersion: 5 })
+
+testParseError('Invalid pubcomp reason code', Buffer.from([
+  112, 4, // Header
+  0, 2, // Message ID
+  16, // reason code
+  0 // properties length
+]), { protocolVersion: 5 })
+
+testParseError('Invalid header flag bits, must be 0x2 for subscribe packet', Buffer.from([
+  128, 9, // Header (subscribeqos=0length=9)
+  0, 6, // Message ID (6)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0 // Qos (0)
+]))
+
+testParseGenerate('subscribe to one topic', {
+  cmd: 'subscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 9,
+  subscriptions: [
+    {
+      topic: 'test',
+      qos: 0
+    }
+  ],
+  messageId: 6
+}, Buffer.from([
+  130, 9, // Header (subscribeqos=1length=9)
+  0, 6, // Message ID (6)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0 // Qos (0)
+]))
+
+testParseError('Invalid subscribe QoS, must be <= 2', Buffer.from([
+  130, 9, // Header (subscribeqos=0length=9)
+  0, 6, // Message ID (6)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  3 // Qos
+]))
+
+testParseError('Invalid subscribe topic flag bits, bits 7-6 must be 0', Buffer.from([
+  130, 10, // Header (subscribeqos=0length=9)
+  0, 6, // Message ID (6)
+  0, // Property length (0)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0x80 // Flags
+]), { protocolVersion: 5 })
+
+testParseError('Invalid retain handling, must be <= 2', Buffer.from([
+  130, 10, // Header (subscribeqos=0length=9)
+  0, 6, // Message ID (6)
+  0, // Property length (0)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0x30 // Flags
+]), { protocolVersion: 5 })
+
+testParseError('Invalid subscribe topic flag bits, bits 7-2 must be 0', Buffer.from([
+  130, 9, // Header (subscribeqos=0length=9)
+  0, 6, // Message ID (6)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0x08 // Flags
+]))
+
+testParseGenerate('subscribe to one topic by MQTT 5', {
+  cmd: 'subscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 26,
+  subscriptions: [
+    {
+      topic: 'test',
+      qos: 0,
+      nl: false,
+      rap: true,
+      rh: 1
+    }
+  ],
+  messageId: 6,
+  properties: {
+    subscriptionIdentifier: 145,
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  130, 26, // Header (subscribeqos=1length=9)
+  0, 6, // Message ID (6)
+  16, // properties length
+  11, 145, 1, // subscriptionIdentifier
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  24 // settings(qos: 0, noLocal: false, Retain as Published: true, retain handling: 1)
+]), { protocolVersion: 5 })
+
+testParseGenerate('subscribe to three topics', {
+  cmd: 'subscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 23,
+  subscriptions: [
+    {
+      topic: 'test',
+      qos: 0
+    }, {
+      topic: 'uest',
+      qos: 1
+    }, {
+      topic: 'tfst',
+      qos: 2
+    }
+  ],
+  messageId: 6
+}, Buffer.from([
+  130, 23, // Header (publishqos=1length=9)
+  0, 6, // Message ID (6)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0, // Qos (0)
+  0, 4, // Topic length
+  117, 101, 115, 116, // Topic (uest)
+  1, // Qos (1)
+  0, 4, // Topic length
+  116, 102, 115, 116, // Topic (tfst)
+  2 // Qos (2)
+]))
+
+testParseGenerate('subscribe to 3 topics by MQTT 5', {
+  cmd: 'subscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 40,
+  subscriptions: [
+    {
+      topic: 'test',
+      qos: 0,
+      nl: false,
+      rap: true,
+      rh: 1
+    },
+    {
+      topic: 'uest',
+      qos: 1,
+      nl: false,
+      rap: false,
+      rh: 0
+    }, {
+      topic: 'tfst',
+      qos: 2,
+      nl: true,
+      rap: false,
+      rh: 0
+    }
+  ],
+  messageId: 6,
+  properties: {
+    subscriptionIdentifier: 145,
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  130, 40, // Header (subscribeqos=1length=9)
+  0, 6, // Message ID (6)
+  16, // properties length
+  11, 145, 1, // subscriptionIdentifier
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  24, // settings(qos: 0, noLocal: false, Retain as Published: true, retain handling: 1)
+  0, 4, // Topic length
+  117, 101, 115, 116, // Topic (uest)
+  1, // Qos (1)
+  0, 4, // Topic length
+  116, 102, 115, 116, // Topic (tfst)
+  6 // Qos (2), No Local: true
+]), { protocolVersion: 5 })
+
+testParseGenerate('suback', {
+  cmd: 'suback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 5,
+  granted: [0, 1, 2],
+  messageId: 6
+}, Buffer.from([
+  144, 5, // Header
+  0, 6, // Message ID
+  0, 1, 2
+]))
+
+testParseGenerate('suback', {
+  cmd: 'suback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 7,
+  granted: [0, 1, 2, 128],
+  messageId: 6
+}, Buffer.from([
+  144, 7, // Header
+  0, 6, // Message ID
+  0, // Property length
+  0, 1, 2, 128 // Granted qos (0, 1, 2) and a rejected being 0x80
+]), { protocolVersion: 5 })
+
+testParseError('Invalid suback QoS, must be <= 2', Buffer.from([
+  144, 6, // Header
+  0, 6, // Message ID
+  0, 1, 2, 128 // Granted qos (0, 1, 2) and a rejected being 0x80
+]))
+
+testParseError('Invalid suback code', Buffer.from([
+  144, 6, // Header
+  0, 6, // Message ID
+  0, 1, 2, 0x79 // Granted qos (0, 1, 2) and an invalid code
+]), { protocolVersion: 5 })
+
+testParseGenerate('suback MQTT 5', {
+  cmd: 'suback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 27,
+  granted: [0, 1, 2, 128],
+  messageId: 6,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  144, 27, // Header
+  0, 6, // Message ID
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  0, 1, 2, 128 // Granted qos (0, 1, 2) and a rejected being 0x80
+]), { protocolVersion: 5 })
+
+testParseGenerate('unsubscribe', {
+  cmd: 'unsubscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 14,
+  unsubscriptions: [
+    'tfst',
+    'test'
+  ],
+  messageId: 7
+}, Buffer.from([
+  162, 14,
+  0, 7, // Message ID (7)
+  0, 4, // Topic length
+  116, 102, 115, 116, // Topic (tfst)
+  0, 4, // Topic length,
+  116, 101, 115, 116 // Topic (test)
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x2 for unsubscribe packet', Buffer.from([
+  160, 14,
+  0, 7, // Message ID (7)
+  0, 4, // Topic length
+  116, 102, 115, 116, // Topic (tfst)
+  0, 4, // Topic length,
+  116, 101, 115, 116 // Topic (test)
+]))
+
+testGenerateError('Invalid unsubscriptions', {
+  cmd: 'unsubscribe',
+  retain: false,
+  qos: 1,
+  dup: true,
+  length: 5,
+  unsubscriptions: 5,
+  messageId: 7
+}, {}, 'unsubscribe with unsubscriptions not an array')
+
+testGenerateError('Invalid unsubscriptions', {
+  cmd: 'unsubscribe',
+  retain: false,
+  qos: 1,
+  dup: true,
+  length: 5,
+  unsubscriptions: [1, 2],
+  messageId: 7
+}, {}, 'unsubscribe with unsubscriptions as an object')
+
+testParseGenerate('unsubscribe MQTT 5', {
+  cmd: 'unsubscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 28,
+  unsubscriptions: [
+    'tfst',
+    'test'
+  ],
+  messageId: 7,
+  properties: {
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  162, 28,
+  0, 7, // Message ID (7)
+  13, // properties length
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  0, 4, // Topic length
+  116, 102, 115, 116, // Topic (tfst)
+  0, 4, // Topic length,
+  116, 101, 115, 116 // Topic (test)
+]), { protocolVersion: 5 })
+
+testParseGenerate('unsuback', {
+  cmd: 'unsuback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  messageId: 8
+}, Buffer.from([
+  176, 2, // Header
+  0, 8 // Message ID
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for unsuback packet', Buffer.from([
+  177, 2, // Header
+  0, 8 // Message ID
+]))
+
+testParseGenerate('unsuback MQTT 5', {
+  cmd: 'unsuback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 25,
+  messageId: 8,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  },
+  granted: [0, 128]
+}, Buffer.from([
+  176, 25, // Header
+  0, 8, // Message ID
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  0, 128 // success and error
+]), { protocolVersion: 5 })
+
+testParseError('Invalid unsuback code', Buffer.from([
+  176, 4, // Header
+  0, 8, // Message ID
+  0, // properties length
+  0x84 // reason codes
+]), { protocolVersion: 5 })
+
+testParseGenerate('pingreq', {
+  cmd: 'pingreq',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 0
+}, Buffer.from([
+  192, 0 // Header
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for pingreq packet', Buffer.from([
+  193, 0 // Header
+]))
+
+testParseGenerate('pingresp', {
+  cmd: 'pingresp',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 0
+}, Buffer.from([
+  208, 0 // Header
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for pingresp packet', Buffer.from([
+  209, 0 // Header
+]))
+
+testParseGenerate('disconnect', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 0
+}, Buffer.from([
+  224, 0 // Header
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for disconnect packet', Buffer.from([
+  225, 0 // Header
+]))
+
+testParseGenerate('disconnect MQTT 5', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 34,
+  reasonCode: 0,
+  properties: {
+    sessionExpiryInterval: 145,
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    },
+    serverReference: 'test'
+  }
+}, Buffer.from([
+  224, 34, // Header
+  0, // reason code
+  32, // properties length
+  17, 0, 0, 0, 145, // sessionExpiryInterval
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  28, 0, 4, 116, 101, 115, 116// serverReference
+]), { protocolVersion: 5 })
+
+testParseGenerate('disconnect MQTT 5 with no properties', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  reasonCode: 0
+}, Buffer.from([
+  224, 2, // Fixed Header (DISCONNECT, Remaining Length)
+  0, // Reason Code (Normal Disconnection)
+  0 // Property Length (0 => No Properties)
+]), { protocolVersion: 5 })
+
+testParseError('Invalid disconnect reason code', Buffer.from([
+  224, 2, // Fixed Header (DISCONNECT, Remaining Length)
+  0x05, // Reason Code (Normal Disconnection)
+  0 // Property Length (0 => No Properties)
+]), { protocolVersion: 5 })
+
+testParseGenerate('auth MQTT 5', {
+  cmd: 'auth',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 36,
+  reasonCode: 0,
+  properties: {
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([0, 1, 2, 3]),
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  240, 36, // Header
+  0, // reason code
+  34, // properties length
+  21, 0, 4, 116, 101, 115, 116, // auth method
+  22, 0, 4, 0, 1, 2, 3, // auth data
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]), { protocolVersion: 5 })
+
+testParseError('Invalid auth reason code', Buffer.from([
+  240, 2, // Fixed Header (DISCONNECT, Remaining Length)
+  0x17, // Reason Code
+  0 // Property Length (0 => No Properties)
+]), { protocolVersion: 5 })
+
+testGenerateError('Invalid protocolId', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 42,
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid protocol version', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 1,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('clientId must be supplied before 3.1.1', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('clientId must be given if cleanSession set to 0', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQTT',
+  protocolVersion: 4,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: false,
+  keepalive: 30,
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid keepalive', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 'hello',
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid keepalive', {
+  cmd: 'connect',
+  keepalive: 3.1416
+})
+
+testGenerateError('Invalid will', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: 42,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid will topic', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid will payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 42
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid username', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 42,
+  password: 'password'
+})
+
+testGenerateError('Invalid password', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 42
+})
+
+testGenerateError('Username is required to use password', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  password: 'password'
+})
+
+testGenerateError('Invalid messageExpiryInterval: -4321', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 60,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: true,
+    messageExpiryInterval: -4321,
+    topicAlias: 100,
+    responseTopic: 'topic',
+    correlationData: Buffer.from([1, 2, 3, 4]),
+    userProperties: {
+      test: 'test'
+    },
+    subscriptionIdentifier: 120,
+    contentType: 'test'
+  }
+}, { protocolVersion: 5 })
+
+testGenerateError('Invalid topicAlias: -100', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 60,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: true,
+    messageExpiryInterval: 4321,
+    topicAlias: -100,
+    responseTopic: 'topic',
+    correlationData: Buffer.from([1, 2, 3, 4]),
+    userProperties: {
+      test: 'test'
+    },
+    subscriptionIdentifier: 120,
+    contentType: 'test'
+  }
+}, { protocolVersion: 5 })
+
+testGenerateError('Invalid subscriptionIdentifier: -120', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 60,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: true,
+    messageExpiryInterval: 4321,
+    topicAlias: 100,
+    responseTopic: 'topic',
+    correlationData: Buffer.from([1, 2, 3, 4]),
+    userProperties: {
+      test: 'test'
+    },
+    subscriptionIdentifier: -120,
+    contentType: 'test'
+  }
+}, { protocolVersion: 5 })
+
+test('support cork', t => {
+  t.plan(9)
+
+  const dest = WS()
+
+  dest._write = (chunk, enc, cb) => {
+    t.pass('_write called')
+    cb()
+  }
+
+  mqtt.writeToStream({
+    cmd: 'connect',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 18,
+    protocolId: 'MQIsdp',
+    protocolVersion: 3,
+    clean: false,
+    keepalive: 30,
+    clientId: 'test'
+  }, dest)
+
+  dest.end()
+})
+
+// The following test case was designed after experiencing errors
+// when trying to connect with tls on a non tls mqtt port
+// the specific behaviour is:
+// - first byte suggests this is a connect message
+// - second byte suggests message length to be smaller than buffer length
+//   thus payload processing starts
+// - the first two bytes suggest a protocol identifier string length
+//   that leads the parser pointer close to the end of the buffer
+// - when trying to read further connect flags the buffer produces
+//   a "out of range" Error
+//
+testParseError('Packet too short', Buffer.from([
+  16, 9,
+  0, 6,
+  77, 81, 73, 115, 100, 112,
+  3
+]))
+
+// CONNECT Packets that show other protocol IDs than
+// the valid values MQTT and MQIsdp should cause an error
+// those packets are a hint that this is not a mqtt connection
+testParseError('Invalid protocolId', Buffer.from([
+  16, 18,
+  0, 6,
+  65, 65, 65, 65, 65, 65, // AAAAAA
+  3, // Protocol version
+  0, // Connect flags
+  0, 10, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+// CONNECT Packets that contain an unsupported protocol version
+// Flag (i.e. not `3` or `4` or '5') should cause an error
+testParseError('Invalid protocol version', Buffer.from([
+  16, 18,
+  0, 6,
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  1, // Protocol version
+  0, // Connect flags
+  0, 10, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+// When a packet contains a string in the variable header and the
+// given string length of this exceeds the overall length of the packet that
+// was specified in the fixed header, parsing must fail.
+// this case simulates this behavior with the protocol ID string of the
+// CONNECT packet. The fixed header suggests a remaining length of 8 bytes
+// which would be exceeded by the string length of 15
+// in this case, a protocol ID parse error is expected
+testParseError('Cannot parse protocolId', Buffer.from([
+  16, 8, // Fixed header
+  0, 15, // string length 15 --> 15 > 8 --> error!
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112
+]))
+
+testParseError('Unknown property', Buffer.from([
+  61, 60, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  0, 10, // Message ID
+  47, // properties length
+  126, 1, // unknown property
+  2, 0, 0, 16, 225, // message expiry interval
+  35, 0, 100, // topicAlias
+  8, 0, 5, 116, 111, 112, 105, 99, // response topic
+  9, 0, 4, 1, 2, 3, 4, // correlationData
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  11, 120, // subscriptionIdentifier
+  3, 0, 4, 116, 101, 115, 116, // content type
+  116, 101, 115, 116 // Payload (test)
+]), { protocolVersion: 5 })
+
+testParseError('Not supported auth packet for this version MQTT', Buffer.from([
+  240, 36, // Header
+  0, // reason code
+  34, // properties length
+  21, 0, 4, 116, 101, 115, 116, // auth method
+  22, 0, 4, 0, 1, 2, 3, // auth data
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]))
+
+// When a Subscribe packet contains a topic_filter and the given
+// length is topic_filter.length + 1 then the last byte (requested QoS) is interpreted as topic_filter
+// reading the requested_qos at the end causes 'Index out of range' read
+testParseError('Malformed Subscribe Payload', Buffer.from([
+  130, 14, // subscribe header and remaining length
+  0, 123, // packet ID
+  0, 10, // topic filter length
+  104, 105, 106, 107, 108, 47, 109, 110, 111, // topic filter with length of 9 bytes
+  0 // requested QoS
+]))
+
+test('Cannot parse property code type', t => {
+  const packets = Buffer.from([
+    16, 16, 0, 4, 77, 81, 84, 84, 5, 2, 0, 60, 3, 33, 0, 20, 0, 0, 98, 2, 211, 1, 224, 2, 0, 32
+  ])
+
+  t.plan(3)
+
+  const parser = mqtt.parser()
+
+  parser.on('error', err => {
+    t.equal(err.message, 'Cannot parse property code type', 'expected error message')
+    t.end()
+  })
+
+  parser.on('packet', (packet) => {
+    t.pass('Packet parsed')
+  })
+
+  parser.parse(packets)
+})
+
+testWriteToStreamError('Invalid command', {
+  cmd: 'invalid'
+})
+
+testWriteToStreamError('Invalid protocolId', {
+  cmd: 'connect',
+  protocolId: {}
+})
+
+test('userProperties null prototype', t => {
+  t.plan(3)
+
+  const packet = mqtt.generate({
+    cmd: 'connect',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 125,
+    protocolId: 'MQTT',
+    protocolVersion: 5,
+    will: {
+      retain: true,
+      qos: 2,
+      properties: {
+        willDelayInterval: 1234,
+        payloadFormatIndicator: false,
+        messageExpiryInterval: 4321,
+        contentType: 'test',
+        responseTopic: 'topic',
+        correlationData: Buffer.from([1, 2, 3, 4]),
+        userProperties: {
+          test: 'test'
+        }
+      },
+      topic: 'topic',
+      payload: Buffer.from([4, 3, 2, 1])
+    },
+    clean: true,
+    keepalive: 30,
+    properties: {
+      sessionExpiryInterval: 1234,
+      receiveMaximum: 432,
+      maximumPacketSize: 100,
+      topicAliasMaximum: 456,
+      requestResponseInformation: true,
+      requestProblemInformation: true,
+      userProperties: {
+        test: 'test'
+      },
+      authenticationMethod: 'test',
+      authenticationData: Buffer.from([1, 2, 3, 4])
+    },
+    clientId: 'test'
+  })
+
+  const parser = mqtt.parser()
+
+  parser.on('packet', packet => {
+    t.equal(packet.cmd, 'connect')
+    t.equal(Object.getPrototypeOf(packet.properties.userProperties), null)
+    t.equal(Object.getPrototypeOf(packet.will.properties.userProperties), null)
+  })
+
+  parser.parse(packet)
+})
+
+test('stops parsing after first error', t => {
+  t.plan(4)
+
+  const parser = mqtt.parser()
+
+  let packetCount = 0
+  let errorCount = 0
+  let expectedPackets = 1
+  let expectedErrors = 1
+
+  parser.on('packet', packet => {
+    t.ok(++packetCount <= expectedPackets, `expected <= ${expectedPackets} packets`)
+  })
+
+  parser.on('error', erroneous => {
+    t.ok(++errorCount <= expectedErrors, `expected <= ${expectedErrors} errors`)
+  })
+
+  parser.parse(Buffer.from([
+    // First, a valid connect packet:
+
+    16, 12, // Header
+    0, 4, // Protocol ID length
+    77, 81, 84, 84, // Protocol ID
+    4, // Protocol version
+    2, // Connect flags
+    0, 30, // Keepalive
+    0, 0, // Client ID length
+
+    // Then an invalid subscribe packet:
+
+    128, 9, // Header (subscribeqos=0length=9)
+    0, 6, // Message ID (6)
+    0, 4, // Topic length,
+    116, 101, 115, 116, // Topic (test)
+    0, // Qos (0)
+
+    // And another invalid subscribe packet:
+
+    128, 9, // Header (subscribeqos=0length=9)
+    0, 6, // Message ID (6)
+    0, 4, // Topic length,
+    116, 101, 115, 116, // Topic (test)
+    0, // Qos (0)
+
+    // Finally, a valid disconnect packet:
+
+    224, 0 // Header
+  ]))
+
+  // Calling parse again clears the error and continues parsing
+  packetCount = 0
+  errorCount = 0
+  expectedPackets = 2
+  expectedErrors = 0
+
+  parser.parse(Buffer.from([
+    // Connect:
+
+    16, 12, // Header
+    0, 4, // Protocol ID length
+    77, 81, 84, 84, // Protocol ID
+    4, // Protocol version
+    2, // Connect flags
+    0, 30, // Keepalive
+    0, 0, // Client ID length
+
+    // Disconnect:
+
+    224, 0 // Header
+  ]))
+})
+
+testGenerateErrorMultipleCmds([
+  'publish',
+  'puback',
+  'pubrec',
+  'pubrel',
+  'subscribe',
+  'suback',
+  'unsubscribe',
+  'unsuback'
+], 'Invalid messageId', {
+  qos: 1, // required for publish
+  topic: 'test', // required for publish
+  messageId: 'a'
+}, {})
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/testRandom.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/testRandom.js
new file mode 100644
index 0000000..84195bd
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/testRandom.js
@@ -0,0 +1,86 @@
+const mqtt = require('./')
+const crypto = require('crypto')
+const max = 1E5
+const start = Date.now() / 1000
+let errors = 0
+let packets = 0
+let randomPacket
+const firstBytes = [
+  16 * 1, // CONNECT
+  16 * 2, // CONNACK
+  16 * 3, // PUBLISH, QoS: 0, No Retain, No Dup
+  16 * 3 + 1, // PUBLISH, QoS: 0, Retain, No Dup
+  16 * 3 + 8, // PUBLISH, QoS: 0, No Retain, Dup
+  16 * 3 + 1 + 8, // PUBLISH, QoS: 0, Retain, Dup
+  16 * 3 + 2, // PUBLISH, QoS: 1, No Retain, No Dup
+  16 * 3 + 2 + 1, // PUBLISH, QoS: 1, Retain, No Dup
+  16 * 3 + 2 + 8, // PUBLISH, QoS: 1, No Retain, Dup
+  16 * 3 + 2 + 1 + 8, // PUBLISH, QoS: 1, Retain, Dup
+  16 * 3 + 4, // PUBLISH, QoS: 2, No Retain, No Dup
+  16 * 3 + 4 + 1, // PUBLISH, QoS: 2, Retain, No Dup
+  16 * 3 + 4 + 8, // PUBLISH, QoS: 2, No Retain, Dup
+  16 * 3 + 4 + 1 + 8, // PUBLISH, QoS: 2, Retain, Dup
+  16 * 4, // PUBACK
+  16 * 5, // PUBREC
+  16 * 6, // PUBREL
+  16 * 7, // PUBCOMP
+  16 * 8, // SUBSCRIBE
+  16 * 9, // SUBACK
+  16 * 10, // UNSUBSCRIBE
+  16 * 11, // UNSUBACK
+  16 * 12, // PINGREQ
+  16 * 13, // PINGRESP
+  16 * 14, // DISCONNECT
+  16 * 15 // RESERVED
+]
+
+function doParse () {
+  const parser = mqtt.parser()
+
+  parser.on('error', onError)
+  parser.on('packet', onPacket)
+  randomPacket = crypto.randomBytes(Math.floor(Math.random() * 512))
+
+  // Increase probability to have a valid first byte in order to at least
+  // enter the parser
+  if (Math.random() > 0.2 && randomPacket.length > 0) randomPacket.writeUInt8(firstBytes[Math.floor(Math.random() * firstBytes.length)], 0)
+  parser.parse(randomPacket)
+}
+
+try {
+  console.log('Starting benchmark')
+  for (let i = 0; i < max; i++) {
+    doParse()
+  }
+} catch (e) {
+  console.log('Exception occurred at packet')
+  console.log(randomPacket)
+  console.log(e.message)
+  console.log(e.stack)
+}
+
+function onError () {
+  errors++
+}
+
+function onPacket () {
+  packets++
+}
+
+const delta = Math.abs(max - packets - errors)
+const time = Date.now() / 1000 - start
+console.log('Benchmark complete')
+console.log('==========================')
+console.log('Sent packets:', max)
+console.log('Total time:', Math.round(time * 100) / 100, 'seconds', '\r\n')
+
+console.log('Valid packets:', packets)
+console.log('Erroneous packets:', errors)
+
+if ((max - packets - errors) < 0) console.log('Excess packets:', delta, '\r\n')
+else console.log('Missing packets:', delta, '\r\n')
+
+console.log('Total packets:', packets + errors)
+console.log('Total errors:', errors + delta)
+console.log('Error rate:', `${((errors + delta) / max * 100).toFixed(2)}%`)
+console.log('==========================')
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/types/index.d.ts b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/types/index.d.ts
new file mode 100644
index 0000000..721a30e
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/types/index.d.ts
@@ -0,0 +1,255 @@
+import EventEmitter = NodeJS.EventEmitter
+import WritableStream = NodeJS.WritableStream
+
+export declare type QoS = 0 | 1 | 2
+
+export declare type PacketCmd = 'auth' |
+  'connack' |
+  'connect' |
+  'disconnect' |
+  'pingreq' |
+  'pingresp' |
+  'puback' |
+  'pubcomp' |
+  'publish' |
+  'pubrel' |
+  'pubrec' |
+  'suback' |
+  'subscribe' |
+  'unsuback' |
+  'unsubscribe'
+
+export declare type UserProperties = {[index: string]: string | string[]}
+
+export interface IPacket {
+  cmd: PacketCmd
+  messageId?: number
+  length?: number
+}
+
+export interface IAuthPacket extends IPacket {
+  cmd: 'auth'
+  reasonCode: number,
+  properties?: {
+    authenticationMethod?: string,
+    authenticationData?: Buffer,
+    reasonString?: string,
+    userProperties?: UserProperties,
+  }
+}
+
+export interface IConnectPacket extends IPacket {
+  cmd: 'connect'
+  clientId: string
+  protocolVersion?: 4 | 5 | 3
+  protocolId?: 'MQTT' | 'MQIsdp'
+  clean?: boolean
+  keepalive?: number
+  username?: string
+  password?: Buffer
+  will?: {
+    topic: string
+    payload: Buffer
+    qos?: QoS
+    retain?: boolean
+    properties?: {
+      willDelayInterval?: number,
+      payloadFormatIndicator?: boolean,
+      messageExpiryInterval?: number,
+      contentType?: string,
+      responseTopic?: string,
+      correlationData?: Buffer,
+      userProperties?: UserProperties
+    }
+  }
+  properties?: {
+    sessionExpiryInterval?: number,
+    receiveMaximum?: number,
+    maximumPacketSize?: number,
+    topicAliasMaximum?: number,
+    requestResponseInformation?: boolean,
+    requestProblemInformation?: boolean,
+    userProperties?: UserProperties,
+    authenticationMethod?: string,
+    authenticationData?: Buffer
+  }
+}
+
+export interface IPublishPacket extends IPacket {
+  cmd: 'publish'
+  qos: QoS
+  dup: boolean
+  retain: boolean
+  topic: string
+  payload: string | Buffer
+  properties?: {
+    payloadFormatIndicator?: boolean,
+    messageExpiryInterval?: number,
+    topicAlias?: number,
+    responseTopic?: string,
+    correlationData?: Buffer,
+    userProperties?: UserProperties,
+    subscriptionIdentifier?: number,
+    contentType?: string
+  }
+}
+
+export interface IConnackPacket extends IPacket {
+  cmd: 'connack'
+  returnCode?: number,
+  reasonCode?: number,
+  sessionPresent: boolean
+  properties?: {
+    sessionExpiryInterval?: number,
+    receiveMaximum?: number,
+    maximumQoS?: number,
+    retainAvailable?: boolean,
+    maximumPacketSize?: number,
+    assignedClientIdentifier?: string,
+    topicAliasMaximum?: number,
+    reasonString?: string,
+    userProperties?: UserProperties,
+    wildcardSubscriptionAvailable?: boolean,
+    subscriptionIdentifiersAvailable?: boolean,
+    sharedSubscriptionAvailable?: boolean,
+    serverKeepAlive?: number,
+    responseInformation?: string,
+    serverReference?: string,
+    authenticationMethod?: string,
+    authenticationData?: Buffer
+  }
+}
+
+export interface ISubscription {
+  topic: string
+  qos: QoS,
+  nl?: boolean,
+  rap?: boolean,
+  rh?: number
+}
+
+export interface ISubscribePacket extends IPacket {
+  cmd: 'subscribe'
+  subscriptions: ISubscription[],
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface ISubackPacket extends IPacket {
+  cmd: 'suback',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  },
+  granted: number[] | Object[]
+}
+
+export interface IUnsubscribePacket extends IPacket {
+  cmd: 'unsubscribe',
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  },
+  unsubscriptions: string[]
+}
+
+export interface IUnsubackPacket extends IPacket {
+  cmd: 'unsuback',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPubackPacket extends IPacket {
+  cmd: 'puback',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPubcompPacket extends IPacket {
+  cmd: 'pubcomp',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPubrelPacket extends IPacket {
+  cmd: 'pubrel',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPubrecPacket extends IPacket {
+  cmd: 'pubrec',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPingreqPacket extends IPacket {
+  cmd: 'pingreq'
+}
+
+export interface IPingrespPacket extends IPacket {
+  cmd: 'pingresp'
+}
+
+export interface IDisconnectPacket extends IPacket {
+  cmd: 'disconnect',
+  reasonCode?: number,
+  properties?: {
+    sessionExpiryInterval?: number,
+    reasonString?: string,
+    userProperties?: UserProperties,
+    serverReference?: string
+  }
+}
+
+export declare type Packet = IConnectPacket |
+  IPublishPacket |
+  IConnackPacket |
+  ISubscribePacket |
+  ISubackPacket |
+  IUnsubscribePacket |
+  IUnsubackPacket |
+  IPubackPacket |
+  IPubcompPacket |
+  IPubrelPacket |
+  IPingreqPacket |
+  IPingrespPacket |
+  IDisconnectPacket |
+  IPubrecPacket |
+  IAuthPacket
+
+export interface Parser extends EventEmitter {
+  on(event: 'packet', callback: (packet: Packet) => void): this
+
+  on(event: 'error', callback: (error: any) => void): this
+
+  parse(buffer: Buffer, opts?: Object): number
+}
+
+export declare function parser(opts?: Object): Parser
+
+export declare function generate(packet: Packet, opts?: Object): Buffer
+
+export declare function writeToStream(object: Packet, stream: WritableStream, opts?: Object): boolean
+
+export declare namespace writeToStream {
+  let cacheNumbers: boolean
+}
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/writeToStream.js b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/writeToStream.js
new file mode 100644
index 0000000..1892fdb
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/mqtt-packet/writeToStream.js
@@ -0,0 +1,1120 @@
+const protocol = require('./constants')
+const empty = Buffer.allocUnsafe(0)
+const zeroBuf = Buffer.from([0])
+const numbers = require('./numbers')
+const nextTick = require('process-nextick-args').nextTick
+const debug = require('debug')('mqtt-packet:writeToStream')
+
+const numCache = numbers.cache
+const generateNumber = numbers.generateNumber
+const generateCache = numbers.generateCache
+const genBufVariableByteInt = numbers.genBufVariableByteInt
+const generate4ByteBuffer = numbers.generate4ByteBuffer
+let writeNumber = writeNumberCached
+let toGenerate = true
+
+function generate (packet, stream, opts) {
+  debug('generate called')
+  if (stream.cork) {
+    stream.cork()
+    nextTick(uncork, stream)
+  }
+
+  if (toGenerate) {
+    toGenerate = false
+    generateCache()
+  }
+  debug('generate: packet.cmd: %s', packet.cmd)
+  switch (packet.cmd) {
+    case 'connect':
+      return connect(packet, stream, opts)
+    case 'connack':
+      return connack(packet, stream, opts)
+    case 'publish':
+      return publish(packet, stream, opts)
+    case 'puback':
+    case 'pubrec':
+    case 'pubrel':
+    case 'pubcomp':
+      return confirmation(packet, stream, opts)
+    case 'subscribe':
+      return subscribe(packet, stream, opts)
+    case 'suback':
+      return suback(packet, stream, opts)
+    case 'unsubscribe':
+      return unsubscribe(packet, stream, opts)
+    case 'unsuback':
+      return unsuback(packet, stream, opts)
+    case 'pingreq':
+    case 'pingresp':
+      return emptyPacket(packet, stream, opts)
+    case 'disconnect':
+      return disconnect(packet, stream, opts)
+    case 'auth':
+      return auth(packet, stream, opts)
+    default:
+      stream.emit('error', new Error('Unknown command'))
+      return false
+  }
+}
+/**
+ * Controls numbers cache.
+ * Set to "false" to allocate buffers on-the-flight instead of pre-generated cache
+ */
+Object.defineProperty(generate, 'cacheNumbers', {
+  get () {
+    return writeNumber === writeNumberCached
+  },
+  set (value) {
+    if (value) {
+      if (!numCache || Object.keys(numCache).length === 0) toGenerate = true
+      writeNumber = writeNumberCached
+    } else {
+      toGenerate = false
+      writeNumber = writeNumberGenerated
+    }
+  }
+})
+
+function uncork (stream) {
+  stream.uncork()
+}
+
+function connect (packet, stream, opts) {
+  const settings = packet || {}
+  const protocolId = settings.protocolId || 'MQTT'
+  let protocolVersion = settings.protocolVersion || 4
+  const will = settings.will
+  let clean = settings.clean
+  const keepalive = settings.keepalive || 0
+  const clientId = settings.clientId || ''
+  const username = settings.username
+  const password = settings.password
+  /* mqtt5 new oprions */
+  const properties = settings.properties
+
+  if (clean === undefined) clean = true
+
+  let length = 0
+
+  // Must be a string and non-falsy
+  if (!protocolId ||
+     (typeof protocolId !== 'string' && !Buffer.isBuffer(protocolId))) {
+    stream.emit('error', new Error('Invalid protocolId'))
+    return false
+  } else length += protocolId.length + 2
+
+  // Must be 3 or 4 or 5
+  if (protocolVersion !== 3 && protocolVersion !== 4 && protocolVersion !== 5) {
+    stream.emit('error', new Error('Invalid protocol version'))
+    return false
+  } else length += 1
+
+  // ClientId might be omitted in 3.1.1 and 5, but only if cleanSession is set to 1
+  if ((typeof clientId === 'string' || Buffer.isBuffer(clientId)) &&
+     (clientId || protocolVersion >= 4) && (clientId || clean)) {
+    length += Buffer.byteLength(clientId) + 2
+  } else {
+    if (protocolVersion < 4) {
+      stream.emit('error', new Error('clientId must be supplied before 3.1.1'))
+      return false
+    }
+    if ((clean * 1) === 0) {
+      stream.emit('error', new Error('clientId must be given if cleanSession set to 0'))
+      return false
+    }
+  }
+
+  // Must be a two byte number
+  if (typeof keepalive !== 'number' ||
+      keepalive < 0 ||
+      keepalive > 65535 ||
+      keepalive % 1 !== 0) {
+    stream.emit('error', new Error('Invalid keepalive'))
+    return false
+  } else length += 2
+
+  // Connect flags
+  length += 1
+
+  let propertiesData
+  let willProperties
+
+  // Properties
+  if (protocolVersion === 5) {
+    propertiesData = getProperties(stream, properties)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // If will exists...
+  if (will) {
+    // It must be an object
+    if (typeof will !== 'object') {
+      stream.emit('error', new Error('Invalid will'))
+      return false
+    }
+    // It must have topic typeof string
+    if (!will.topic || typeof will.topic !== 'string') {
+      stream.emit('error', new Error('Invalid will topic'))
+      return false
+    } else {
+      length += Buffer.byteLength(will.topic) + 2
+    }
+
+    // Payload
+    length += 2 // payload length
+    if (will.payload) {
+      if (will.payload.length >= 0) {
+        if (typeof will.payload === 'string') {
+          length += Buffer.byteLength(will.payload)
+        } else {
+          length += will.payload.length
+        }
+      } else {
+        stream.emit('error', new Error('Invalid will payload'))
+        return false
+      }
+    }
+    // will properties
+    willProperties = {}
+    if (protocolVersion === 5) {
+      willProperties = getProperties(stream, will.properties)
+      if (!willProperties) { return false }
+      length += willProperties.length
+    }
+  }
+
+  // Username
+  let providedUsername = false
+  if (username != null) {
+    if (isStringOrBuffer(username)) {
+      providedUsername = true
+      length += Buffer.byteLength(username) + 2
+    } else {
+      stream.emit('error', new Error('Invalid username'))
+      return false
+    }
+  }
+
+  // Password
+  if (password != null) {
+    if (!providedUsername) {
+      stream.emit('error', new Error('Username is required to use password'))
+      return false
+    }
+
+    if (isStringOrBuffer(password)) {
+      length += byteLength(password) + 2
+    } else {
+      stream.emit('error', new Error('Invalid password'))
+      return false
+    }
+  }
+
+  // Generate header
+  stream.write(protocol.CONNECT_HEADER)
+
+  // Generate length
+  writeVarByteInt(stream, length)
+
+  // Generate protocol ID
+  writeStringOrBuffer(stream, protocolId)
+
+  if (settings.bridgeMode) {
+    protocolVersion += 128
+  }
+
+  stream.write(
+    protocolVersion === 131
+      ? protocol.VERSION131
+      : protocolVersion === 132
+        ? protocol.VERSION132
+        : protocolVersion === 4
+          ? protocol.VERSION4
+          : protocolVersion === 5
+            ? protocol.VERSION5
+            : protocol.VERSION3
+  )
+
+  // Connect flags
+  let flags = 0
+  flags |= (username != null) ? protocol.USERNAME_MASK : 0
+  flags |= (password != null) ? protocol.PASSWORD_MASK : 0
+  flags |= (will && will.retain) ? protocol.WILL_RETAIN_MASK : 0
+  flags |= (will && will.qos) ? will.qos << protocol.WILL_QOS_SHIFT : 0
+  flags |= will ? protocol.WILL_FLAG_MASK : 0
+  flags |= clean ? protocol.CLEAN_SESSION_MASK : 0
+
+  stream.write(Buffer.from([flags]))
+
+  // Keepalive
+  writeNumber(stream, keepalive)
+
+  // Properties
+  if (protocolVersion === 5) {
+    propertiesData.write()
+  }
+
+  // Client ID
+  writeStringOrBuffer(stream, clientId)
+
+  // Will
+  if (will) {
+    if (protocolVersion === 5) {
+      willProperties.write()
+    }
+    writeString(stream, will.topic)
+    writeStringOrBuffer(stream, will.payload)
+  }
+
+  // Username and password
+  if (username != null) {
+    writeStringOrBuffer(stream, username)
+  }
+  if (password != null) {
+    writeStringOrBuffer(stream, password)
+  }
+  // This is a small packet that happens only once on a stream
+  // We assume the stream is always free to receive more data after this
+  return true
+}
+
+function connack (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const rc = version === 5 ? settings.reasonCode : settings.returnCode
+  const properties = settings.properties
+  let length = 2 // length of rc and sessionHeader
+
+  // Check return code
+  if (typeof rc !== 'number') {
+    stream.emit('error', new Error('Invalid return code'))
+    return false
+  }
+  // mqtt5 properties
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getProperties(stream, properties)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  stream.write(protocol.CONNACK_HEADER)
+  // length
+  writeVarByteInt(stream, length)
+  stream.write(settings.sessionPresent ? protocol.SESSIONPRESENT_HEADER : zeroBuf)
+
+  stream.write(Buffer.from([rc]))
+  if (propertiesData != null) {
+    propertiesData.write()
+  }
+  return true
+}
+
+function publish (packet, stream, opts) {
+  debug('publish: packet: %o', packet)
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const qos = settings.qos || 0
+  const retain = settings.retain ? protocol.RETAIN_MASK : 0
+  const topic = settings.topic
+  const payload = settings.payload || empty
+  const id = settings.messageId
+  const properties = settings.properties
+
+  let length = 0
+
+  // Topic must be a non-empty string or Buffer
+  if (typeof topic === 'string') length += Buffer.byteLength(topic) + 2
+  else if (Buffer.isBuffer(topic)) length += topic.length + 2
+  else {
+    stream.emit('error', new Error('Invalid topic'))
+    return false
+  }
+
+  // Get the payload length
+  if (!Buffer.isBuffer(payload)) length += Buffer.byteLength(payload)
+  else length += payload.length
+
+  // Message ID must a number if qos > 0
+  if (qos && typeof id !== 'number') {
+    stream.emit('error', new Error('Invalid messageId'))
+    return false
+  } else if (qos) length += 2
+
+  // mqtt5 properties
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getProperties(stream, properties)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // Header
+  stream.write(protocol.PUBLISH_HEADER[qos][settings.dup ? 1 : 0][retain ? 1 : 0])
+
+  // Remaining length
+  writeVarByteInt(stream, length)
+
+  // Topic
+  writeNumber(stream, byteLength(topic))
+  stream.write(topic)
+
+  // Message ID
+  if (qos > 0) writeNumber(stream, id)
+
+  // Properties
+  if (propertiesData != null) {
+    propertiesData.write()
+  }
+
+  // Payload
+  debug('publish: payload: %o', payload)
+  return stream.write(payload)
+}
+
+/* Puback, pubrec, pubrel and pubcomp */
+function confirmation (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const type = settings.cmd || 'puback'
+  const id = settings.messageId
+  const dup = (settings.dup && type === 'pubrel') ? protocol.DUP_MASK : 0
+  let qos = 0
+  const reasonCode = settings.reasonCode
+  const properties = settings.properties
+  let length = version === 5 ? 3 : 2
+
+  if (type === 'pubrel') qos = 1
+
+  // Check message ID
+  if (typeof id !== 'number') {
+    stream.emit('error', new Error('Invalid messageId'))
+    return false
+  }
+
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    // Confirm should not add empty property length with no properties (rfc 3.4.2.2.1)
+    if (typeof properties === 'object') {
+      propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
+      if (!propertiesData) { return false }
+      length += propertiesData.length
+    }
+  }
+
+  // Header
+  stream.write(protocol.ACKS[type][qos][dup][0])
+
+  // Length
+  writeVarByteInt(stream, length)
+
+  // Message ID
+  writeNumber(stream, id)
+
+  // reason code in header
+  if (version === 5) {
+    stream.write(Buffer.from([reasonCode]))
+  }
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+  return true
+}
+
+function subscribe (packet, stream, opts) {
+  debug('subscribe: packet: ')
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const dup = settings.dup ? protocol.DUP_MASK : 0
+  const id = settings.messageId
+  const subs = settings.subscriptions
+  const properties = settings.properties
+
+  let length = 0
+
+  // Check message ID
+  if (typeof id !== 'number') {
+    stream.emit('error', new Error('Invalid messageId'))
+    return false
+  } else length += 2
+
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getProperties(stream, properties)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // Check subscriptions
+  if (typeof subs === 'object' && subs.length) {
+    for (let i = 0; i < subs.length; i += 1) {
+      const itopic = subs[i].topic
+      const iqos = subs[i].qos
+
+      if (typeof itopic !== 'string') {
+        stream.emit('error', new Error('Invalid subscriptions - invalid topic'))
+        return false
+      }
+      if (typeof iqos !== 'number') {
+        stream.emit('error', new Error('Invalid subscriptions - invalid qos'))
+        return false
+      }
+
+      if (version === 5) {
+        const nl = subs[i].nl || false
+        if (typeof nl !== 'boolean') {
+          stream.emit('error', new Error('Invalid subscriptions - invalid No Local'))
+          return false
+        }
+        const rap = subs[i].rap || false
+        if (typeof rap !== 'boolean') {
+          stream.emit('error', new Error('Invalid subscriptions - invalid Retain as Published'))
+          return false
+        }
+        const rh = subs[i].rh || 0
+        if (typeof rh !== 'number' || rh > 2) {
+          stream.emit('error', new Error('Invalid subscriptions - invalid Retain Handling'))
+          return false
+        }
+      }
+
+      length += Buffer.byteLength(itopic) + 2 + 1
+    }
+  } else {
+    stream.emit('error', new Error('Invalid subscriptions'))
+    return false
+  }
+
+  // Generate header
+  debug('subscribe: writing to stream: %o', protocol.SUBSCRIBE_HEADER)
+  stream.write(protocol.SUBSCRIBE_HEADER[1][dup ? 1 : 0][0])
+
+  // Generate length
+  writeVarByteInt(stream, length)
+
+  // Generate message ID
+  writeNumber(stream, id)
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+
+  let result = true
+
+  // Generate subs
+  for (const sub of subs) {
+    const jtopic = sub.topic
+    const jqos = sub.qos
+    const jnl = +sub.nl
+    const jrap = +sub.rap
+    const jrh = sub.rh
+    let joptions
+
+    // Write topic string
+    writeString(stream, jtopic)
+
+    // options process
+    joptions = protocol.SUBSCRIBE_OPTIONS_QOS[jqos]
+    if (version === 5) {
+      joptions |= jnl ? protocol.SUBSCRIBE_OPTIONS_NL : 0
+      joptions |= jrap ? protocol.SUBSCRIBE_OPTIONS_RAP : 0
+      joptions |= jrh ? protocol.SUBSCRIBE_OPTIONS_RH[jrh] : 0
+    }
+    // Write options
+    result = stream.write(Buffer.from([joptions]))
+  }
+
+  return result
+}
+
+function suback (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const id = settings.messageId
+  const granted = settings.granted
+  const properties = settings.properties
+  let length = 0
+
+  // Check message ID
+  if (typeof id !== 'number') {
+    stream.emit('error', new Error('Invalid messageId'))
+    return false
+  } else length += 2
+
+  // Check granted qos vector
+  if (typeof granted === 'object' && granted.length) {
+    for (let i = 0; i < granted.length; i += 1) {
+      if (typeof granted[i] !== 'number') {
+        stream.emit('error', new Error('Invalid qos vector'))
+        return false
+      }
+      length += 1
+    }
+  } else {
+    stream.emit('error', new Error('Invalid qos vector'))
+    return false
+  }
+
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // header
+  stream.write(protocol.SUBACK_HEADER)
+
+  // Length
+  writeVarByteInt(stream, length)
+
+  // Message ID
+  writeNumber(stream, id)
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+
+  return stream.write(Buffer.from(granted))
+}
+
+function unsubscribe (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const id = settings.messageId
+  const dup = settings.dup ? protocol.DUP_MASK : 0
+  const unsubs = settings.unsubscriptions
+  const properties = settings.properties
+
+  let length = 0
+
+  // Check message ID
+  if (typeof id !== 'number') {
+    stream.emit('error', new Error('Invalid messageId'))
+    return false
+  } else {
+    length += 2
+  }
+  // Check unsubs
+  if (typeof unsubs === 'object' && unsubs.length) {
+    for (let i = 0; i < unsubs.length; i += 1) {
+      if (typeof unsubs[i] !== 'string') {
+        stream.emit('error', new Error('Invalid unsubscriptions'))
+        return false
+      }
+      length += Buffer.byteLength(unsubs[i]) + 2
+    }
+  } else {
+    stream.emit('error', new Error('Invalid unsubscriptions'))
+    return false
+  }
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getProperties(stream, properties)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // Header
+  stream.write(protocol.UNSUBSCRIBE_HEADER[1][dup ? 1 : 0][0])
+
+  // Length
+  writeVarByteInt(stream, length)
+
+  // Message ID
+  writeNumber(stream, id)
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+
+  // Unsubs
+  let result = true
+  for (let j = 0; j < unsubs.length; j++) {
+    result = writeString(stream, unsubs[j])
+  }
+
+  return result
+}
+
+function unsuback (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const id = settings.messageId
+  const dup = settings.dup ? protocol.DUP_MASK : 0
+  const granted = settings.granted
+  const properties = settings.properties
+  const type = settings.cmd
+  const qos = 0
+
+  let length = 2
+
+  // Check message ID
+  if (typeof id !== 'number') {
+    stream.emit('error', new Error('Invalid messageId'))
+    return false
+  }
+
+  // Check granted
+  if (version === 5) {
+    if (typeof granted === 'object' && granted.length) {
+      for (let i = 0; i < granted.length; i += 1) {
+        if (typeof granted[i] !== 'number') {
+          stream.emit('error', new Error('Invalid qos vector'))
+          return false
+        }
+        length += 1
+      }
+    } else {
+      stream.emit('error', new Error('Invalid qos vector'))
+      return false
+    }
+  }
+
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // Header
+  stream.write(protocol.ACKS[type][qos][dup][0])
+
+  // Length
+  writeVarByteInt(stream, length)
+
+  // Message ID
+  writeNumber(stream, id)
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+
+  // payload
+  if (version === 5) {
+    stream.write(Buffer.from(granted))
+  }
+  return true
+}
+
+function emptyPacket (packet, stream, opts) {
+  return stream.write(protocol.EMPTY[packet.cmd])
+}
+
+function disconnect (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const reasonCode = settings.reasonCode
+  const properties = settings.properties
+  let length = version === 5 ? 1 : 0
+
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // Header
+  stream.write(Buffer.from([protocol.codes.disconnect << 4]))
+
+  // Length
+  writeVarByteInt(stream, length)
+
+  // reason code in header
+  if (version === 5) {
+    stream.write(Buffer.from([reasonCode]))
+  }
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+
+  return true
+}
+
+function auth (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const reasonCode = settings.reasonCode
+  const properties = settings.properties
+  let length = version === 5 ? 1 : 0
+
+  if (version !== 5) stream.emit('error', new Error('Invalid mqtt version for auth packet'))
+
+  // properies mqtt 5
+  const propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
+  if (!propertiesData) { return false }
+  length += propertiesData.length
+
+  // Header
+  stream.write(Buffer.from([protocol.codes.auth << 4]))
+
+  // Length
+  writeVarByteInt(stream, length)
+
+  // reason code in header
+  stream.write(Buffer.from([reasonCode]))
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+  return true
+}
+
+/**
+ * writeVarByteInt - write an MQTT style variable byte integer to the buffer
+ *
+ * @param <Buffer> buffer - destination
+ * @param <Number> pos - offset
+ * @param <Number> length - length (>0)
+ * @returns <Number> number of bytes written
+ *
+ * @api private
+ */
+
+const varByteIntCache = {}
+function writeVarByteInt (stream, num) {
+  if (num > protocol.VARBYTEINT_MAX) {
+    stream.emit('error', new Error(`Invalid variable byte integer: ${num}`))
+    return false
+  }
+
+  let buffer = varByteIntCache[num]
+
+  if (!buffer) {
+    buffer = genBufVariableByteInt(num)
+    if (num < 16384) varByteIntCache[num] = buffer
+  }
+  debug('writeVarByteInt: writing to stream: %o', buffer)
+  return stream.write(buffer)
+}
+
+/**
+ * writeString - write a utf8 string to the buffer
+ *
+ * @param <Buffer> buffer - destination
+ * @param <Number> pos - offset
+ * @param <String> string - string to write
+ * @return <Number> number of bytes written
+ *
+ * @api private
+ */
+
+function writeString (stream, string) {
+  const strlen = Buffer.byteLength(string)
+  writeNumber(stream, strlen)
+
+  debug('writeString: %s', string)
+  return stream.write(string, 'utf8')
+}
+
+/**
+ * writeStringPair - write a utf8 string pairs to the buffer
+ *
+ * @param <Buffer> buffer - destination
+ * @param <String> name - string name to write
+ * @param <String> value - string value to write
+ * @return <Number> number of bytes written
+ *
+ * @api private
+ */
+function writeStringPair (stream, name, value) {
+  writeString(stream, name)
+  writeString(stream, value)
+}
+
+/**
+ * writeNumber - write a two byte number to the buffer
+ *
+ * @param <Buffer> buffer - destination
+ * @param <Number> pos - offset
+ * @param <String> number - number to write
+ * @return <Number> number of bytes written
+ *
+ * @api private
+ */
+function writeNumberCached (stream, number) {
+  debug('writeNumberCached: number: %d', number)
+  debug('writeNumberCached: %o', numCache[number])
+  return stream.write(numCache[number])
+}
+function writeNumberGenerated (stream, number) {
+  const generatedNumber = generateNumber(number)
+  debug('writeNumberGenerated: %o', generatedNumber)
+  return stream.write(generatedNumber)
+}
+function write4ByteNumber (stream, number) {
+  const generated4ByteBuffer = generate4ByteBuffer(number)
+  debug('write4ByteNumber: %o', generated4ByteBuffer)
+  return stream.write(generated4ByteBuffer)
+}
+/**
+ * writeStringOrBuffer - write a String or Buffer with the its length prefix
+ *
+ * @param <Buffer> buffer - destination
+ * @param <Number> pos - offset
+ * @param <String> toWrite - String or Buffer
+ * @return <Number> number of bytes written
+ */
+function writeStringOrBuffer (stream, toWrite) {
+  if (typeof toWrite === 'string') {
+    writeString(stream, toWrite)
+  } else if (toWrite) {
+    writeNumber(stream, toWrite.length)
+    stream.write(toWrite)
+  } else writeNumber(stream, 0)
+}
+
+function getProperties (stream, properties) {
+  /* connect properties */
+  if (typeof properties !== 'object' || properties.length != null) {
+    return {
+      length: 1,
+      write () {
+        writeProperties(stream, {}, 0)
+      }
+    }
+  }
+  let propertiesLength = 0
+  function getLengthProperty (name, value) {
+    const type = protocol.propertiesTypes[name]
+    let length = 0
+    switch (type) {
+      case 'byte': {
+        if (typeof value !== 'boolean') {
+          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + 1
+        break
+      }
+      case 'int8': {
+        if (typeof value !== 'number' || value < 0 || value > 0xff) {
+          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + 1
+        break
+      }
+      case 'binary': {
+        if (value && value === null) {
+          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + Buffer.byteLength(value) + 2
+        break
+      }
+      case 'int16': {
+        if (typeof value !== 'number' || value < 0 || value > 0xffff) {
+          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + 2
+        break
+      }
+      case 'int32': {
+        if (typeof value !== 'number' || value < 0 || value > 0xffffffff) {
+          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + 4
+        break
+      }
+      case 'var': {
+        // var byte integer is max 24 bits packed in 32 bits
+        if (typeof value !== 'number' || value < 0 || value > 0x0fffffff) {
+          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + Buffer.byteLength(genBufVariableByteInt(value))
+        break
+      }
+      case 'string': {
+        if (typeof value !== 'string') {
+          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + 2 + Buffer.byteLength(value.toString())
+        break
+      }
+      case 'pair': {
+        if (typeof value !== 'object') {
+          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += Object.getOwnPropertyNames(value).reduce((result, name) => {
+          const currentValue = value[name]
+          if (Array.isArray(currentValue)) {
+            result += currentValue.reduce((currentLength, value) => {
+              currentLength += 1 + 2 + Buffer.byteLength(name.toString()) + 2 + Buffer.byteLength(value.toString())
+              return currentLength
+            }, 0)
+          } else {
+            result += 1 + 2 + Buffer.byteLength(name.toString()) + 2 + Buffer.byteLength(value[name].toString())
+          }
+          return result
+        }, 0)
+        break
+      }
+      default: {
+        stream.emit('error', new Error(`Invalid property ${name}: ${value}`))
+        return false
+      }
+    }
+    return length
+  }
+  if (properties) {
+    for (const propName in properties) {
+      let propLength = 0
+      let propValueLength = 0
+      const propValue = properties[propName]
+      if (Array.isArray(propValue)) {
+        for (let valueIndex = 0; valueIndex < propValue.length; valueIndex++) {
+          propValueLength = getLengthProperty(propName, propValue[valueIndex])
+          if (!propValueLength) { return false }
+          propLength += propValueLength
+        }
+      } else {
+        propValueLength = getLengthProperty(propName, propValue)
+        if (!propValueLength) { return false }
+        propLength = propValueLength
+      }
+      if (!propLength) return false
+      propertiesLength += propLength
+    }
+  }
+  const propertiesLengthLength = Buffer.byteLength(genBufVariableByteInt(propertiesLength))
+
+  return {
+    length: propertiesLengthLength + propertiesLength,
+    write () {
+      writeProperties(stream, properties, propertiesLength)
+    }
+  }
+}
+
+function getPropertiesByMaximumPacketSize (stream, properties, opts, length) {
+  const mayEmptyProps = ['reasonString', 'userProperties']
+  const maximumPacketSize = opts && opts.properties && opts.properties.maximumPacketSize ? opts.properties.maximumPacketSize : 0
+
+  let propertiesData = getProperties(stream, properties)
+  if (maximumPacketSize) {
+    while (length + propertiesData.length > maximumPacketSize) {
+      const currentMayEmptyProp = mayEmptyProps.shift()
+      if (currentMayEmptyProp && properties[currentMayEmptyProp]) {
+        delete properties[currentMayEmptyProp]
+        propertiesData = getProperties(stream, properties)
+      } else {
+        return false
+      }
+    }
+  }
+  return propertiesData
+}
+
+function writeProperty (stream, propName, value) {
+  const type = protocol.propertiesTypes[propName]
+  switch (type) {
+    case 'byte': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      stream.write(Buffer.from([+value]))
+      break
+    }
+    case 'int8': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      stream.write(Buffer.from([value]))
+      break
+    }
+    case 'binary': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      writeStringOrBuffer(stream, value)
+      break
+    }
+    case 'int16': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      writeNumber(stream, value)
+      break
+    }
+    case 'int32': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      write4ByteNumber(stream, value)
+      break
+    }
+    case 'var': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      writeVarByteInt(stream, value)
+      break
+    }
+    case 'string': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      writeString(stream, value)
+      break
+    }
+    case 'pair': {
+      Object.getOwnPropertyNames(value).forEach(name => {
+        const currentValue = value[name]
+        if (Array.isArray(currentValue)) {
+          currentValue.forEach(value => {
+            stream.write(Buffer.from([protocol.properties[propName]]))
+            writeStringPair(stream, name.toString(), value.toString())
+          })
+        } else {
+          stream.write(Buffer.from([protocol.properties[propName]]))
+          writeStringPair(stream, name.toString(), currentValue.toString())
+        }
+      })
+      break
+    }
+    default: {
+      stream.emit('error', new Error(`Invalid property ${propName} value: ${value}`))
+      return false
+    }
+  }
+}
+
+function writeProperties (stream, properties, propertiesLength) {
+  /* write properties to stream */
+  writeVarByteInt(stream, propertiesLength)
+  for (const propName in properties) {
+    if (Object.prototype.hasOwnProperty.call(properties, propName) && properties[propName] !== null) {
+      const value = properties[propName]
+      if (Array.isArray(value)) {
+        for (let valueIndex = 0; valueIndex < value.length; valueIndex++) {
+          writeProperty(stream, propName, value[valueIndex])
+        }
+      } else {
+        writeProperty(stream, propName, value)
+      }
+    }
+  }
+}
+
+function byteLength (bufOrString) {
+  if (!bufOrString) return 0
+  else if (bufOrString instanceof Buffer) return bufOrString.length
+  else return Buffer.byteLength(bufOrString)
+}
+
+function isStringOrBuffer (field) {
+  return typeof field === 'string' || field instanceof Buffer
+}
+
+module.exports = generate
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/CONTRIBUTING.md b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/CONTRIBUTING.md
new file mode 100644
index 0000000..f478d58
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/CONTRIBUTING.md
@@ -0,0 +1,38 @@
+# Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+* (a) The contribution was created in whole or in part by me and I
+  have the right to submit it under the open source license
+  indicated in the file; or
+
+* (b) The contribution is based upon previous work that, to the best
+  of my knowledge, is covered under an appropriate open source
+  license and I have the right under that license to submit that
+  work with modifications, whether created in whole or in part
+  by me, under the same open source license (unless I am
+  permitted to submit under a different license), as indicated
+  in the file; or
+
+* (c) The contribution was provided directly to me by some other
+  person who certified (a), (b) or (c) and I have not modified
+  it.
+
+* (d) I understand and agree that this project and the contribution
+  are public and that a record of the contribution (including all
+  personal information I submit with it, including my sign-off) is
+  maintained indefinitely and may be redistributed consistent with
+  this project or the open source license(s) involved.
+
+## Moderation Policy
+
+The [Node.js Moderation Policy] applies to this WG.
+
+## Code of Conduct
+
+The [Node.js Code of Conduct][] applies to this WG.
+
+[Node.js Code of Conduct]:
+https://github.com/nodejs/node/blob/master/CODE_OF_CONDUCT.md
+[Node.js Moderation Policy]:
+https://github.com/nodejs/TSC/blob/master/Moderation-Policy.md
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/GOVERNANCE.md b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/GOVERNANCE.md
new file mode 100644
index 0000000..16ffb93
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/GOVERNANCE.md
@@ -0,0 +1,136 @@
+### Streams Working Group
+
+The Node.js Streams is jointly governed by a Working Group
+(WG)
+that is responsible for high-level guidance of the project.
+
+The WG has final authority over this project including:
+
+* Technical direction
+* Project governance and process (including this policy)
+* Contribution policy
+* GitHub repository hosting
+* Conduct guidelines
+* Maintaining the list of additional Collaborators
+
+For the current list of WG members, see the project
+[README.md](./README.md#current-project-team-members).
+
+### Collaborators
+
+The readable-stream GitHub repository is
+maintained by the WG and additional Collaborators who are added by the
+WG on an ongoing basis.
+
+Individuals making significant and valuable contributions are made
+Collaborators and given commit-access to the project. These
+individuals are identified by the WG and their addition as
+Collaborators is discussed during the WG meeting.
+
+_Note:_ If you make a significant contribution and are not considered
+for commit-access log an issue or contact a WG member directly and it
+will be brought up in the next WG meeting.
+
+Modifications of the contents of the readable-stream repository are
+made on
+a collaborative basis. Anybody with a GitHub account may propose a
+modification via pull request and it will be considered by the project
+Collaborators. All pull requests must be reviewed and accepted by a
+Collaborator with sufficient expertise who is able to take full
+responsibility for the change. In the case of pull requests proposed
+by an existing Collaborator, an additional Collaborator is required
+for sign-off. Consensus should be sought if additional Collaborators
+participate and there is disagreement around a particular
+modification. See _Consensus Seeking Process_ below for further detail
+on the consensus model used for governance.
+
+Collaborators may opt to elevate significant or controversial
+modifications, or modifications that have not found consensus to the
+WG for discussion by assigning the ***WG-agenda*** tag to a pull
+request or issue. The WG should serve as the final arbiter where
+required.
+
+For the current list of Collaborators, see the project
+[README.md](./README.md#members).
+
+### WG Membership
+
+WG seats are not time-limited.  There is no fixed size of the WG.
+However, the expected target is between 6 and 12, to ensure adequate
+coverage of important areas of expertise, balanced with the ability to
+make decisions efficiently.
+
+There is no specific set of requirements or qualifications for WG
+membership beyond these rules.
+
+The WG may add additional members to the WG by unanimous consensus.
+
+A WG member may be removed from the WG by voluntary resignation, or by
+unanimous consensus of all other WG members.
+
+Changes to WG membership should be posted in the agenda, and may be
+suggested as any other agenda item (see "WG Meetings" below).
+
+If an addition or removal is proposed during a meeting, and the full
+WG is not in attendance to participate, then the addition or removal
+is added to the agenda for the subsequent meeting.  This is to ensure
+that all members are given the opportunity to participate in all
+membership decisions.  If a WG member is unable to attend a meeting
+where a planned membership decision is being made, then their consent
+is assumed.
+
+No more than 1/3 of the WG members may be affiliated with the same
+employer.  If removal or resignation of a WG member, or a change of
+employment by a WG member, creates a situation where more than 1/3 of
+the WG membership shares an employer, then the situation must be
+immediately remedied by the resignation or removal of one or more WG
+members affiliated with the over-represented employer(s).
+
+### WG Meetings
+
+The WG meets occasionally on a Google Hangout On Air. A designated moderator
+approved by the WG runs the meeting. Each meeting should be
+published to YouTube.
+
+Items are added to the WG agenda that are considered contentious or
+are modifications of governance, contribution policy, WG membership,
+or release process.
+
+The intention of the agenda is not to approve or review all patches;
+that should happen continuously on GitHub and be handled by the larger
+group of Collaborators.
+
+Any community member or contributor can ask that something be added to
+the next meeting's agenda by logging a GitHub Issue. Any Collaborator,
+WG member or the moderator can add the item to the agenda by adding
+the ***WG-agenda*** tag to the issue.
+
+Prior to each WG meeting the moderator will share the Agenda with
+members of the WG. WG members can add any items they like to the
+agenda at the beginning of each meeting. The moderator and the WG
+cannot veto or remove items.
+
+The WG may invite persons or representatives from certain projects to
+participate in a non-voting capacity.
+
+The moderator is responsible for summarizing the discussion of each
+agenda item and sends it as a pull request after the meeting.
+
+### Consensus Seeking Process
+
+The WG follows a
+[Consensus
+Seeking](http://en.wikipedia.org/wiki/Consensus-seeking_decision-making)
+decision-making model.
+
+When an agenda item has appeared to reach a consensus the moderator
+will ask "Does anyone object?" as a final call for dissent from the
+consensus.
+
+If an agenda item cannot reach a consensus a WG member can call for
+either a closing vote or a vote to table the issue to the next
+meeting. The call for a vote must be seconded by a majority of the WG
+or else the discussion will continue. Simple majority wins.
+
+Note that changes to WG membership require a majority consensus.  See
+"WG Membership" above.
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/LICENSE b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/LICENSE
new file mode 100644
index 0000000..2873b3b
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/LICENSE
@@ -0,0 +1,47 @@
+Node.js is licensed for use as follows:
+
+"""
+Copyright Node.js contributors. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+"""
+
+This license applies to parts of Node.js originating from the
+https://github.com/joyent/node repository:
+
+"""
+Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+"""
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/README.md b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/README.md
new file mode 100644
index 0000000..19117c1
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/README.md
@@ -0,0 +1,106 @@
+# readable-stream
+
+***Node.js core streams for userland*** [![Build Status](https://travis-ci.com/nodejs/readable-stream.svg?branch=master)](https://travis-ci.com/nodejs/readable-stream)
+
+
+[![NPM](https://nodei.co/npm/readable-stream.png?downloads=true&downloadRank=true)](https://nodei.co/npm/readable-stream/)
+[![NPM](https://nodei.co/npm-dl/readable-stream.png?&months=6&height=3)](https://nodei.co/npm/readable-stream/)
+
+
+[![Sauce Test Status](https://saucelabs.com/browser-matrix/readabe-stream.svg)](https://saucelabs.com/u/readabe-stream)
+
+```bash
+npm install --save readable-stream
+```
+
+This package is a mirror of the streams implementations in Node.js.
+
+Full documentation may be found on the [Node.js website](https://nodejs.org/dist/v10.18.1/docs/api/stream.html).
+
+If you want to guarantee a stable streams base, regardless of what version of
+Node you, or the users of your libraries are using, use **readable-stream** *only* and avoid the *"stream"* module in Node-core, for background see [this blogpost](http://r.va.gg/2014/06/why-i-dont-use-nodes-core-stream-module.html).
+
+As of version 2.0.0 **readable-stream** uses semantic versioning.
+
+## Version 3.x.x
+
+v3.x.x of `readable-stream` is a cut from Node 10. This version supports Node 6, 8, and 10, as well as evergreen browsers, IE 11 and latest Safari. The breaking changes introduced by v3 are composed by the combined breaking changes in [Node v9](https://nodejs.org/en/blog/release/v9.0.0/) and [Node v10](https://nodejs.org/en/blog/release/v10.0.0/), as follows:
+
+1. Error codes: https://github.com/nodejs/node/pull/13310,
+   https://github.com/nodejs/node/pull/13291,
+   https://github.com/nodejs/node/pull/16589,
+   https://github.com/nodejs/node/pull/15042,
+   https://github.com/nodejs/node/pull/15665,
+   https://github.com/nodejs/readable-stream/pull/344
+2. 'readable' have precedence over flowing
+   https://github.com/nodejs/node/pull/18994
+3. make virtual methods errors consistent
+   https://github.com/nodejs/node/pull/18813
+4. updated streams error handling
+   https://github.com/nodejs/node/pull/18438
+5. writable.end should return this.
+   https://github.com/nodejs/node/pull/18780
+6. readable continues to read when push('')
+   https://github.com/nodejs/node/pull/18211
+7. add custom inspect to BufferList
+   https://github.com/nodejs/node/pull/17907
+8. always defer 'readable' with nextTick
+   https://github.com/nodejs/node/pull/17979
+
+## Version 2.x.x
+v2.x.x of `readable-stream` is a cut of the stream module from Node 8 (there have been no semver-major changes from Node 4 to 8). This version supports all Node.js versions from 0.8, as well as evergreen browsers and IE 10 & 11.
+
+### Big Thanks
+
+Cross-browser Testing Platform and Open Source <3 Provided by [Sauce Labs][sauce]
+
+# Usage
+
+You can swap your `require('stream')` with `require('readable-stream')`
+without any changes, if you are just using one of the main classes and
+functions.
+
+```js
+const {
+  Readable,
+  Writable,
+  Transform,
+  Duplex,
+  pipeline,
+  finished
+} = require('readable-stream')
+````
+
+Note that `require('stream')` will return `Stream`, while
+`require('readable-stream')` will return `Readable`. We discourage using
+whatever is exported directly, but rather use one of the properties as
+shown in the example above.
+
+# Streams Working Group
+
+`readable-stream` is maintained by the Streams Working Group, which
+oversees the development and maintenance of the Streams API within
+Node.js. The responsibilities of the Streams Working Group include:
+
+* Addressing stream issues on the Node.js issue tracker.
+* Authoring and editing stream documentation within the Node.js project.
+* Reviewing changes to stream subclasses within the Node.js project.
+* Redirecting changes to streams from the Node.js project to this
+  project.
+* Assisting in the implementation of stream providers within Node.js.
+* Recommending versions of `readable-stream` to be included in Node.js.
+* Messaging about the future of streams to give the community advance
+  notice of changes.
+
+<a name="members"></a>
+## Team Members
+
+* **Calvin Metcalf** ([@calvinmetcalf](https://github.com/calvinmetcalf)) &lt;calvin.metcalf@gmail.com&gt;
+  - Release GPG key: F3EF5F62A87FC27A22E643F714CE4FF5015AA242
+* **Mathias Buus** ([@mafintosh](https://github.com/mafintosh)) &lt;mathiasbuus@gmail.com&gt;
+* **Matteo Collina** ([@mcollina](https://github.com/mcollina)) &lt;matteo.collina@gmail.com&gt;
+  - Release GPG key: 3ABC01543F22DD2239285CDD818674489FBC127E
+* **Irina Shestak** ([@lrlna](https://github.com/lrlna)) &lt;shestak.irina@gmail.com&gt;
+* **Yoshua Wyuts** ([@yoshuawuyts](https://github.com/yoshuawuyts)) &lt;yoshuawuyts@gmail.com&gt;
+
+[sauce]: https://saucelabs.com
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/errors-browser.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/errors-browser.js
new file mode 100644
index 0000000..fb8e73e
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/errors-browser.js
@@ -0,0 +1,127 @@
+'use strict';
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }
+
+var codes = {};
+
+function createErrorType(code, message, Base) {
+  if (!Base) {
+    Base = Error;
+  }
+
+  function getMessage(arg1, arg2, arg3) {
+    if (typeof message === 'string') {
+      return message;
+    } else {
+      return message(arg1, arg2, arg3);
+    }
+  }
+
+  var NodeError =
+  /*#__PURE__*/
+  function (_Base) {
+    _inheritsLoose(NodeError, _Base);
+
+    function NodeError(arg1, arg2, arg3) {
+      return _Base.call(this, getMessage(arg1, arg2, arg3)) || this;
+    }
+
+    return NodeError;
+  }(Base);
+
+  NodeError.prototype.name = Base.name;
+  NodeError.prototype.code = code;
+  codes[code] = NodeError;
+} // https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js
+
+
+function oneOf(expected, thing) {
+  if (Array.isArray(expected)) {
+    var len = expected.length;
+    expected = expected.map(function (i) {
+      return String(i);
+    });
+
+    if (len > 2) {
+      return "one of ".concat(thing, " ").concat(expected.slice(0, len - 1).join(', '), ", or ") + expected[len - 1];
+    } else if (len === 2) {
+      return "one of ".concat(thing, " ").concat(expected[0], " or ").concat(expected[1]);
+    } else {
+      return "of ".concat(thing, " ").concat(expected[0]);
+    }
+  } else {
+    return "of ".concat(thing, " ").concat(String(expected));
+  }
+} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
+
+
+function startsWith(str, search, pos) {
+  return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
+} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
+
+
+function endsWith(str, search, this_len) {
+  if (this_len === undefined || this_len > str.length) {
+    this_len = str.length;
+  }
+
+  return str.substring(this_len - search.length, this_len) === search;
+} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes
+
+
+function includes(str, search, start) {
+  if (typeof start !== 'number') {
+    start = 0;
+  }
+
+  if (start + search.length > str.length) {
+    return false;
+  } else {
+    return str.indexOf(search, start) !== -1;
+  }
+}
+
+createErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {
+  return 'The value "' + value + '" is invalid for option "' + name + '"';
+}, TypeError);
+createErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {
+  // determiner: 'must be' or 'must not be'
+  var determiner;
+
+  if (typeof expected === 'string' && startsWith(expected, 'not ')) {
+    determiner = 'must not be';
+    expected = expected.replace(/^not /, '');
+  } else {
+    determiner = 'must be';
+  }
+
+  var msg;
+
+  if (endsWith(name, ' argument')) {
+    // For cases like 'first argument'
+    msg = "The ".concat(name, " ").concat(determiner, " ").concat(oneOf(expected, 'type'));
+  } else {
+    var type = includes(name, '.') ? 'property' : 'argument';
+    msg = "The \"".concat(name, "\" ").concat(type, " ").concat(determiner, " ").concat(oneOf(expected, 'type'));
+  }
+
+  msg += ". Received type ".concat(typeof actual);
+  return msg;
+}, TypeError);
+createErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
+createErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {
+  return 'The ' + name + ' method is not implemented';
+});
+createErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');
+createErrorType('ERR_STREAM_DESTROYED', function (name) {
+  return 'Cannot call ' + name + ' after a stream was destroyed';
+});
+createErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
+createErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');
+createErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');
+createErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);
+createErrorType('ERR_UNKNOWN_ENCODING', function (arg) {
+  return 'Unknown encoding: ' + arg;
+}, TypeError);
+createErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');
+module.exports.codes = codes;
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/errors.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/errors.js
new file mode 100644
index 0000000..8471526
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/errors.js
@@ -0,0 +1,116 @@
+'use strict';
+
+const codes = {};
+
+function createErrorType(code, message, Base) {
+  if (!Base) {
+    Base = Error
+  }
+
+  function getMessage (arg1, arg2, arg3) {
+    if (typeof message === 'string') {
+      return message
+    } else {
+      return message(arg1, arg2, arg3)
+    }
+  }
+
+  class NodeError extends Base {
+    constructor (arg1, arg2, arg3) {
+      super(getMessage(arg1, arg2, arg3));
+    }
+  }
+
+  NodeError.prototype.name = Base.name;
+  NodeError.prototype.code = code;
+
+  codes[code] = NodeError;
+}
+
+// https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js
+function oneOf(expected, thing) {
+  if (Array.isArray(expected)) {
+    const len = expected.length;
+    expected = expected.map((i) => String(i));
+    if (len > 2) {
+      return `one of ${thing} ${expected.slice(0, len - 1).join(', ')}, or ` +
+             expected[len - 1];
+    } else if (len === 2) {
+      return `one of ${thing} ${expected[0]} or ${expected[1]}`;
+    } else {
+      return `of ${thing} ${expected[0]}`;
+    }
+  } else {
+    return `of ${thing} ${String(expected)}`;
+  }
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
+function startsWith(str, search, pos) {
+	return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
+function endsWith(str, search, this_len) {
+	if (this_len === undefined || this_len > str.length) {
+		this_len = str.length;
+	}
+	return str.substring(this_len - search.length, this_len) === search;
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes
+function includes(str, search, start) {
+  if (typeof start !== 'number') {
+    start = 0;
+  }
+
+  if (start + search.length > str.length) {
+    return false;
+  } else {
+    return str.indexOf(search, start) !== -1;
+  }
+}
+
+createErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {
+  return 'The value "' + value + '" is invalid for option "' + name + '"'
+}, TypeError);
+createErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {
+  // determiner: 'must be' or 'must not be'
+  let determiner;
+  if (typeof expected === 'string' && startsWith(expected, 'not ')) {
+    determiner = 'must not be';
+    expected = expected.replace(/^not /, '');
+  } else {
+    determiner = 'must be';
+  }
+
+  let msg;
+  if (endsWith(name, ' argument')) {
+    // For cases like 'first argument'
+    msg = `The ${name} ${determiner} ${oneOf(expected, 'type')}`;
+  } else {
+    const type = includes(name, '.') ? 'property' : 'argument';
+    msg = `The "${name}" ${type} ${determiner} ${oneOf(expected, 'type')}`;
+  }
+
+  msg += `. Received type ${typeof actual}`;
+  return msg;
+}, TypeError);
+createErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
+createErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {
+  return 'The ' + name + ' method is not implemented'
+});
+createErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');
+createErrorType('ERR_STREAM_DESTROYED', function (name) {
+  return 'Cannot call ' + name + ' after a stream was destroyed';
+});
+createErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
+createErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');
+createErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');
+createErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);
+createErrorType('ERR_UNKNOWN_ENCODING', function (arg) {
+  return 'Unknown encoding: ' + arg
+}, TypeError);
+createErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');
+
+module.exports.codes = codes;
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/experimentalWarning.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/experimentalWarning.js
new file mode 100644
index 0000000..78e8414
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/experimentalWarning.js
@@ -0,0 +1,17 @@
+'use strict'
+
+var experimentalWarnings = new Set();
+
+function emitExperimentalWarning(feature) {
+  if (experimentalWarnings.has(feature)) return;
+  var msg = feature + ' is an experimental feature. This feature could ' +
+       'change at any time';
+  experimentalWarnings.add(feature);
+  process.emitWarning(msg, 'ExperimentalWarning');
+}
+
+function noop() {}
+
+module.exports.emitExperimentalWarning = process.emitWarning
+  ? emitExperimentalWarning
+  : noop;
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_duplex.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_duplex.js
new file mode 100644
index 0000000..19abfa6
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_duplex.js
@@ -0,0 +1,126 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a duplex stream is just a stream that is both readable and writable.
+// Since JS doesn't have multiple prototypal inheritance, this class
+// prototypally inherits from Readable, and then parasitically from
+// Writable.
+
+'use strict';
+
+/*<replacement>*/
+var objectKeys = Object.keys || function (obj) {
+  var keys = [];
+  for (var key in obj) keys.push(key);
+  return keys;
+};
+/*</replacement>*/
+
+module.exports = Duplex;
+var Readable = require('./_stream_readable');
+var Writable = require('./_stream_writable');
+require('inherits')(Duplex, Readable);
+{
+  // Allow the keys array to be GC'ed.
+  var keys = objectKeys(Writable.prototype);
+  for (var v = 0; v < keys.length; v++) {
+    var method = keys[v];
+    if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
+  }
+}
+function Duplex(options) {
+  if (!(this instanceof Duplex)) return new Duplex(options);
+  Readable.call(this, options);
+  Writable.call(this, options);
+  this.allowHalfOpen = true;
+  if (options) {
+    if (options.readable === false) this.readable = false;
+    if (options.writable === false) this.writable = false;
+    if (options.allowHalfOpen === false) {
+      this.allowHalfOpen = false;
+      this.once('end', onend);
+    }
+  }
+}
+Object.defineProperty(Duplex.prototype, 'writableHighWaterMark', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState.highWaterMark;
+  }
+});
+Object.defineProperty(Duplex.prototype, 'writableBuffer', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState && this._writableState.getBuffer();
+  }
+});
+Object.defineProperty(Duplex.prototype, 'writableLength', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState.length;
+  }
+});
+
+// the no-half-open enforcer
+function onend() {
+  // If the writable side ended, then we're ok.
+  if (this._writableState.ended) return;
+
+  // no more data can be written.
+  // But allow more writes to happen in this tick.
+  process.nextTick(onEndNT, this);
+}
+function onEndNT(self) {
+  self.end();
+}
+Object.defineProperty(Duplex.prototype, 'destroyed', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    if (this._readableState === undefined || this._writableState === undefined) {
+      return false;
+    }
+    return this._readableState.destroyed && this._writableState.destroyed;
+  },
+  set: function set(value) {
+    // we ignore the value if the stream
+    // has not been initialized yet
+    if (this._readableState === undefined || this._writableState === undefined) {
+      return;
+    }
+
+    // backward compatibility, the user is explicitly
+    // managing destroyed
+    this._readableState.destroyed = value;
+    this._writableState.destroyed = value;
+  }
+});
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_passthrough.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_passthrough.js
new file mode 100644
index 0000000..24a6bdd
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_passthrough.js
@@ -0,0 +1,37 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a passthrough stream.
+// basically just the most minimal sort of Transform stream.
+// Every written chunk gets output as-is.
+
+'use strict';
+
+module.exports = PassThrough;
+var Transform = require('./_stream_transform');
+require('inherits')(PassThrough, Transform);
+function PassThrough(options) {
+  if (!(this instanceof PassThrough)) return new PassThrough(options);
+  Transform.call(this, options);
+}
+PassThrough.prototype._transform = function (chunk, encoding, cb) {
+  cb(null, chunk);
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_readable.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_readable.js
new file mode 100644
index 0000000..df1f608
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_readable.js
@@ -0,0 +1,1027 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+
+module.exports = Readable;
+
+/*<replacement>*/
+var Duplex;
+/*</replacement>*/
+
+Readable.ReadableState = ReadableState;
+
+/*<replacement>*/
+var EE = require('events').EventEmitter;
+var EElistenerCount = function EElistenerCount(emitter, type) {
+  return emitter.listeners(type).length;
+};
+/*</replacement>*/
+
+/*<replacement>*/
+var Stream = require('./internal/streams/stream');
+/*</replacement>*/
+
+var Buffer = require('buffer').Buffer;
+var OurUint8Array = (typeof global !== 'undefined' ? global : typeof window !== 'undefined' ? window : typeof self !== 'undefined' ? self : {}).Uint8Array || function () {};
+function _uint8ArrayToBuffer(chunk) {
+  return Buffer.from(chunk);
+}
+function _isUint8Array(obj) {
+  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
+}
+
+/*<replacement>*/
+var debugUtil = require('util');
+var debug;
+if (debugUtil && debugUtil.debuglog) {
+  debug = debugUtil.debuglog('stream');
+} else {
+  debug = function debug() {};
+}
+/*</replacement>*/
+
+var BufferList = require('./internal/streams/buffer_list');
+var destroyImpl = require('./internal/streams/destroy');
+var _require = require('./internal/streams/state'),
+  getHighWaterMark = _require.getHighWaterMark;
+var _require$codes = require('../errors').codes,
+  ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,
+  ERR_STREAM_PUSH_AFTER_EOF = _require$codes.ERR_STREAM_PUSH_AFTER_EOF,
+  ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
+  ERR_STREAM_UNSHIFT_AFTER_END_EVENT = _require$codes.ERR_STREAM_UNSHIFT_AFTER_END_EVENT;
+
+// Lazy loaded to improve the startup performance.
+var StringDecoder;
+var createReadableStreamAsyncIterator;
+var from;
+require('inherits')(Readable, Stream);
+var errorOrDestroy = destroyImpl.errorOrDestroy;
+var kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];
+function prependListener(emitter, event, fn) {
+  // Sadly this is not cacheable as some libraries bundle their own
+  // event emitter implementation with them.
+  if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn);
+
+  // This is a hack to make sure that our error handler is attached before any
+  // userland ones.  NEVER DO THIS. This is here only because this code needs
+  // to continue to work with older versions of Node.js that do not include
+  // the prependListener() method. The goal is to eventually remove this hack.
+  if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (Array.isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
+}
+function ReadableState(options, stream, isDuplex) {
+  Duplex = Duplex || require('./_stream_duplex');
+  options = options || {};
+
+  // Duplex streams are both readable and writable, but share
+  // the same options object.
+  // However, some cases require setting options to different
+  // values for the readable and the writable sides of the duplex stream.
+  // These options can be provided separately as readableXXX and writableXXX.
+  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex;
+
+  // object stream flag. Used to make read(n) ignore n and to
+  // make all the buffer merging and length checks go away
+  this.objectMode = !!options.objectMode;
+  if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode;
+
+  // the point at which it stops calling _read() to fill the buffer
+  // Note: 0 is a valid value, means "don't call _read preemptively ever"
+  this.highWaterMark = getHighWaterMark(this, options, 'readableHighWaterMark', isDuplex);
+
+  // A linked list is used to store data chunks instead of an array because the
+  // linked list can remove elements from the beginning faster than
+  // array.shift()
+  this.buffer = new BufferList();
+  this.length = 0;
+  this.pipes = null;
+  this.pipesCount = 0;
+  this.flowing = null;
+  this.ended = false;
+  this.endEmitted = false;
+  this.reading = false;
+
+  // a flag to be able to tell if the event 'readable'/'data' is emitted
+  // immediately, or on a later tick.  We set this to true at first, because
+  // any actions that shouldn't happen until "later" should generally also
+  // not happen before the first read call.
+  this.sync = true;
+
+  // whenever we return null, then we set a flag to say
+  // that we're awaiting a 'readable' event emission.
+  this.needReadable = false;
+  this.emittedReadable = false;
+  this.readableListening = false;
+  this.resumeScheduled = false;
+  this.paused = true;
+
+  // Should close be emitted on destroy. Defaults to true.
+  this.emitClose = options.emitClose !== false;
+
+  // Should .destroy() be called after 'end' (and potentially 'finish')
+  this.autoDestroy = !!options.autoDestroy;
+
+  // has it been destroyed
+  this.destroyed = false;
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
+
+  // the number of writers that are awaiting a drain event in .pipe()s
+  this.awaitDrain = 0;
+
+  // if true, a maybeReadMore has been scheduled
+  this.readingMore = false;
+  this.decoder = null;
+  this.encoding = null;
+  if (options.encoding) {
+    if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
+    this.decoder = new StringDecoder(options.encoding);
+    this.encoding = options.encoding;
+  }
+}
+function Readable(options) {
+  Duplex = Duplex || require('./_stream_duplex');
+  if (!(this instanceof Readable)) return new Readable(options);
+
+  // Checking for a Stream.Duplex instance is faster here instead of inside
+  // the ReadableState constructor, at least with V8 6.5
+  var isDuplex = this instanceof Duplex;
+  this._readableState = new ReadableState(options, this, isDuplex);
+
+  // legacy
+  this.readable = true;
+  if (options) {
+    if (typeof options.read === 'function') this._read = options.read;
+    if (typeof options.destroy === 'function') this._destroy = options.destroy;
+  }
+  Stream.call(this);
+}
+Object.defineProperty(Readable.prototype, 'destroyed', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    if (this._readableState === undefined) {
+      return false;
+    }
+    return this._readableState.destroyed;
+  },
+  set: function set(value) {
+    // we ignore the value if the stream
+    // has not been initialized yet
+    if (!this._readableState) {
+      return;
+    }
+
+    // backward compatibility, the user is explicitly
+    // managing destroyed
+    this._readableState.destroyed = value;
+  }
+});
+Readable.prototype.destroy = destroyImpl.destroy;
+Readable.prototype._undestroy = destroyImpl.undestroy;
+Readable.prototype._destroy = function (err, cb) {
+  cb(err);
+};
+
+// Manually shove something into the read() buffer.
+// This returns true if the highWaterMark has not been hit yet,
+// similar to how Writable.write() returns true if you should
+// write() some more.
+Readable.prototype.push = function (chunk, encoding) {
+  var state = this._readableState;
+  var skipChunkCheck;
+  if (!state.objectMode) {
+    if (typeof chunk === 'string') {
+      encoding = encoding || state.defaultEncoding;
+      if (encoding !== state.encoding) {
+        chunk = Buffer.from(chunk, encoding);
+        encoding = '';
+      }
+      skipChunkCheck = true;
+    }
+  } else {
+    skipChunkCheck = true;
+  }
+  return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);
+};
+
+// Unshift should *always* be something directly out of read()
+Readable.prototype.unshift = function (chunk) {
+  return readableAddChunk(this, chunk, null, true, false);
+};
+function readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {
+  debug('readableAddChunk', chunk);
+  var state = stream._readableState;
+  if (chunk === null) {
+    state.reading = false;
+    onEofChunk(stream, state);
+  } else {
+    var er;
+    if (!skipChunkCheck) er = chunkInvalid(state, chunk);
+    if (er) {
+      errorOrDestroy(stream, er);
+    } else if (state.objectMode || chunk && chunk.length > 0) {
+      if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {
+        chunk = _uint8ArrayToBuffer(chunk);
+      }
+      if (addToFront) {
+        if (state.endEmitted) errorOrDestroy(stream, new ERR_STREAM_UNSHIFT_AFTER_END_EVENT());else addChunk(stream, state, chunk, true);
+      } else if (state.ended) {
+        errorOrDestroy(stream, new ERR_STREAM_PUSH_AFTER_EOF());
+      } else if (state.destroyed) {
+        return false;
+      } else {
+        state.reading = false;
+        if (state.decoder && !encoding) {
+          chunk = state.decoder.write(chunk);
+          if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);
+        } else {
+          addChunk(stream, state, chunk, false);
+        }
+      }
+    } else if (!addToFront) {
+      state.reading = false;
+      maybeReadMore(stream, state);
+    }
+  }
+
+  // We can push more data if we are below the highWaterMark.
+  // Also, if we have no data yet, we can stand some more bytes.
+  // This is to work around cases where hwm=0, such as the repl.
+  return !state.ended && (state.length < state.highWaterMark || state.length === 0);
+}
+function addChunk(stream, state, chunk, addToFront) {
+  if (state.flowing && state.length === 0 && !state.sync) {
+    state.awaitDrain = 0;
+    stream.emit('data', chunk);
+  } else {
+    // update the buffer info.
+    state.length += state.objectMode ? 1 : chunk.length;
+    if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);
+    if (state.needReadable) emitReadable(stream);
+  }
+  maybeReadMore(stream, state);
+}
+function chunkInvalid(state, chunk) {
+  var er;
+  if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
+    er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer', 'Uint8Array'], chunk);
+  }
+  return er;
+}
+Readable.prototype.isPaused = function () {
+  return this._readableState.flowing === false;
+};
+
+// backwards compatibility.
+Readable.prototype.setEncoding = function (enc) {
+  if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
+  var decoder = new StringDecoder(enc);
+  this._readableState.decoder = decoder;
+  // If setEncoding(null), decoder.encoding equals utf8
+  this._readableState.encoding = this._readableState.decoder.encoding;
+
+  // Iterate over current buffer to convert already stored Buffers:
+  var p = this._readableState.buffer.head;
+  var content = '';
+  while (p !== null) {
+    content += decoder.write(p.data);
+    p = p.next;
+  }
+  this._readableState.buffer.clear();
+  if (content !== '') this._readableState.buffer.push(content);
+  this._readableState.length = content.length;
+  return this;
+};
+
+// Don't raise the hwm > 1GB
+var MAX_HWM = 0x40000000;
+function computeNewHighWaterMark(n) {
+  if (n >= MAX_HWM) {
+    // TODO(ronag): Throw ERR_VALUE_OUT_OF_RANGE.
+    n = MAX_HWM;
+  } else {
+    // Get the next highest power of 2 to prevent increasing hwm excessively in
+    // tiny amounts
+    n--;
+    n |= n >>> 1;
+    n |= n >>> 2;
+    n |= n >>> 4;
+    n |= n >>> 8;
+    n |= n >>> 16;
+    n++;
+  }
+  return n;
+}
+
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function howMuchToRead(n, state) {
+  if (n <= 0 || state.length === 0 && state.ended) return 0;
+  if (state.objectMode) return 1;
+  if (n !== n) {
+    // Only flow one buffer at a time
+    if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;
+  }
+  // If we're asking for more than the current hwm, then raise the hwm.
+  if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
+  if (n <= state.length) return n;
+  // Don't have enough
+  if (!state.ended) {
+    state.needReadable = true;
+    return 0;
+  }
+  return state.length;
+}
+
+// you can override either this method, or the async _read(n) below.
+Readable.prototype.read = function (n) {
+  debug('read', n);
+  n = parseInt(n, 10);
+  var state = this._readableState;
+  var nOrig = n;
+  if (n !== 0) state.emittedReadable = false;
+
+  // if we're doing read(0) to trigger a readable event, but we
+  // already have a bunch of data in the buffer, then just trigger
+  // the 'readable' event and move on.
+  if (n === 0 && state.needReadable && ((state.highWaterMark !== 0 ? state.length >= state.highWaterMark : state.length > 0) || state.ended)) {
+    debug('read: emitReadable', state.length, state.ended);
+    if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);
+    return null;
+  }
+  n = howMuchToRead(n, state);
+
+  // if we've ended, and we're now clear, then finish it up.
+  if (n === 0 && state.ended) {
+    if (state.length === 0) endReadable(this);
+    return null;
+  }
+
+  // All the actual chunk generation logic needs to be
+  // *below* the call to _read.  The reason is that in certain
+  // synthetic stream cases, such as passthrough streams, _read
+  // may be a completely synchronous operation which may change
+  // the state of the read buffer, providing enough data when
+  // before there was *not* enough.
+  //
+  // So, the steps are:
+  // 1. Figure out what the state of things will be after we do
+  // a read from the buffer.
+  //
+  // 2. If that resulting state will trigger a _read, then call _read.
+  // Note that this may be asynchronous, or synchronous.  Yes, it is
+  // deeply ugly to write APIs this way, but that still doesn't mean
+  // that the Readable class should behave improperly, as streams are
+  // designed to be sync/async agnostic.
+  // Take note if the _read call is sync or async (ie, if the read call
+  // has returned yet), so that we know whether or not it's safe to emit
+  // 'readable' etc.
+  //
+  // 3. Actually pull the requested chunks out of the buffer and return.
+
+  // if we need a readable event, then we need to do some reading.
+  var doRead = state.needReadable;
+  debug('need readable', doRead);
+
+  // if we currently have less than the highWaterMark, then also read some
+  if (state.length === 0 || state.length - n < state.highWaterMark) {
+    doRead = true;
+    debug('length less than watermark', doRead);
+  }
+
+  // however, if we've ended, then there's no point, and if we're already
+  // reading, then it's unnecessary.
+  if (state.ended || state.reading) {
+    doRead = false;
+    debug('reading or ended', doRead);
+  } else if (doRead) {
+    debug('do read');
+    state.reading = true;
+    state.sync = true;
+    // if the length is currently zero, then we *need* a readable event.
+    if (state.length === 0) state.needReadable = true;
+    // call internal read method
+    this._read(state.highWaterMark);
+    state.sync = false;
+    // If _read pushed data synchronously, then `reading` will be false,
+    // and we need to re-evaluate how much data we can return to the user.
+    if (!state.reading) n = howMuchToRead(nOrig, state);
+  }
+  var ret;
+  if (n > 0) ret = fromList(n, state);else ret = null;
+  if (ret === null) {
+    state.needReadable = state.length <= state.highWaterMark;
+    n = 0;
+  } else {
+    state.length -= n;
+    state.awaitDrain = 0;
+  }
+  if (state.length === 0) {
+    // If we have nothing in the buffer, then we want to know
+    // as soon as we *do* get something into the buffer.
+    if (!state.ended) state.needReadable = true;
+
+    // If we tried to read() past the EOF, then emit end on the next tick.
+    if (nOrig !== n && state.ended) endReadable(this);
+  }
+  if (ret !== null) this.emit('data', ret);
+  return ret;
+};
+function onEofChunk(stream, state) {
+  debug('onEofChunk');
+  if (state.ended) return;
+  if (state.decoder) {
+    var chunk = state.decoder.end();
+    if (chunk && chunk.length) {
+      state.buffer.push(chunk);
+      state.length += state.objectMode ? 1 : chunk.length;
+    }
+  }
+  state.ended = true;
+  if (state.sync) {
+    // if we are sync, wait until next tick to emit the data.
+    // Otherwise we risk emitting data in the flow()
+    // the readable code triggers during a read() call
+    emitReadable(stream);
+  } else {
+    // emit 'readable' now to make sure it gets picked up.
+    state.needReadable = false;
+    if (!state.emittedReadable) {
+      state.emittedReadable = true;
+      emitReadable_(stream);
+    }
+  }
+}
+
+// Don't emit readable right away in sync mode, because this can trigger
+// another read() call => stack overflow.  This way, it might trigger
+// a nextTick recursion warning, but that's not so bad.
+function emitReadable(stream) {
+  var state = stream._readableState;
+  debug('emitReadable', state.needReadable, state.emittedReadable);
+  state.needReadable = false;
+  if (!state.emittedReadable) {
+    debug('emitReadable', state.flowing);
+    state.emittedReadable = true;
+    process.nextTick(emitReadable_, stream);
+  }
+}
+function emitReadable_(stream) {
+  var state = stream._readableState;
+  debug('emitReadable_', state.destroyed, state.length, state.ended);
+  if (!state.destroyed && (state.length || state.ended)) {
+    stream.emit('readable');
+    state.emittedReadable = false;
+  }
+
+  // The stream needs another readable event if
+  // 1. It is not flowing, as the flow mechanism will take
+  //    care of it.
+  // 2. It is not ended.
+  // 3. It is below the highWaterMark, so we can schedule
+  //    another readable later.
+  state.needReadable = !state.flowing && !state.ended && state.length <= state.highWaterMark;
+  flow(stream);
+}
+
+// at this point, the user has presumably seen the 'readable' event,
+// and called read() to consume some data.  that may have triggered
+// in turn another _read(n) call, in which case reading = true if
+// it's in progress.
+// However, if we're not ended, or reading, and the length < hwm,
+// then go ahead and try to read some more preemptively.
+function maybeReadMore(stream, state) {
+  if (!state.readingMore) {
+    state.readingMore = true;
+    process.nextTick(maybeReadMore_, stream, state);
+  }
+}
+function maybeReadMore_(stream, state) {
+  // Attempt to read more data if we should.
+  //
+  // The conditions for reading more data are (one of):
+  // - Not enough data buffered (state.length < state.highWaterMark). The loop
+  //   is responsible for filling the buffer with enough data if such data
+  //   is available. If highWaterMark is 0 and we are not in the flowing mode
+  //   we should _not_ attempt to buffer any extra data. We'll get more data
+  //   when the stream consumer calls read() instead.
+  // - No data in the buffer, and the stream is in flowing mode. In this mode
+  //   the loop below is responsible for ensuring read() is called. Failing to
+  //   call read here would abort the flow and there's no other mechanism for
+  //   continuing the flow if the stream consumer has just subscribed to the
+  //   'data' event.
+  //
+  // In addition to the above conditions to keep reading data, the following
+  // conditions prevent the data from being read:
+  // - The stream has ended (state.ended).
+  // - There is already a pending 'read' operation (state.reading). This is a
+  //   case where the the stream has called the implementation defined _read()
+  //   method, but they are processing the call asynchronously and have _not_
+  //   called push() with new data. In this case we skip performing more
+  //   read()s. The execution ends in this method again after the _read() ends
+  //   up calling push() with more data.
+  while (!state.reading && !state.ended && (state.length < state.highWaterMark || state.flowing && state.length === 0)) {
+    var len = state.length;
+    debug('maybeReadMore read 0');
+    stream.read(0);
+    if (len === state.length)
+      // didn't get any data, stop spinning.
+      break;
+  }
+  state.readingMore = false;
+}
+
+// abstract method.  to be overridden in specific implementation classes.
+// call cb(er, data) where data is <= n in length.
+// for virtual (non-string, non-buffer) streams, "length" is somewhat
+// arbitrary, and perhaps not very meaningful.
+Readable.prototype._read = function (n) {
+  errorOrDestroy(this, new ERR_METHOD_NOT_IMPLEMENTED('_read()'));
+};
+Readable.prototype.pipe = function (dest, pipeOpts) {
+  var src = this;
+  var state = this._readableState;
+  switch (state.pipesCount) {
+    case 0:
+      state.pipes = dest;
+      break;
+    case 1:
+      state.pipes = [state.pipes, dest];
+      break;
+    default:
+      state.pipes.push(dest);
+      break;
+  }
+  state.pipesCount += 1;
+  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);
+  var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;
+  var endFn = doEnd ? onend : unpipe;
+  if (state.endEmitted) process.nextTick(endFn);else src.once('end', endFn);
+  dest.on('unpipe', onunpipe);
+  function onunpipe(readable, unpipeInfo) {
+    debug('onunpipe');
+    if (readable === src) {
+      if (unpipeInfo && unpipeInfo.hasUnpiped === false) {
+        unpipeInfo.hasUnpiped = true;
+        cleanup();
+      }
+    }
+  }
+  function onend() {
+    debug('onend');
+    dest.end();
+  }
+
+  // when the dest drains, it reduces the awaitDrain counter
+  // on the source.  This would be more elegant with a .once()
+  // handler in flow(), but adding and removing repeatedly is
+  // too slow.
+  var ondrain = pipeOnDrain(src);
+  dest.on('drain', ondrain);
+  var cleanedUp = false;
+  function cleanup() {
+    debug('cleanup');
+    // cleanup event handlers once the pipe is broken
+    dest.removeListener('close', onclose);
+    dest.removeListener('finish', onfinish);
+    dest.removeListener('drain', ondrain);
+    dest.removeListener('error', onerror);
+    dest.removeListener('unpipe', onunpipe);
+    src.removeListener('end', onend);
+    src.removeListener('end', unpipe);
+    src.removeListener('data', ondata);
+    cleanedUp = true;
+
+    // if the reader is waiting for a drain event from this
+    // specific writer, then it would cause it to never start
+    // flowing again.
+    // So, if this is awaiting a drain, then we just call it now.
+    // If we don't know, then assume that we are waiting for one.
+    if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();
+  }
+  src.on('data', ondata);
+  function ondata(chunk) {
+    debug('ondata');
+    var ret = dest.write(chunk);
+    debug('dest.write', ret);
+    if (ret === false) {
+      // If the user unpiped during `dest.write()`, it is possible
+      // to get stuck in a permanently paused state if that write
+      // also returned false.
+      // => Check whether `dest` is still a piping destination.
+      if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {
+        debug('false write response, pause', state.awaitDrain);
+        state.awaitDrain++;
+      }
+      src.pause();
+    }
+  }
+
+  // if the dest has an error, then stop piping into it.
+  // however, don't suppress the throwing behavior for this.
+  function onerror(er) {
+    debug('onerror', er);
+    unpipe();
+    dest.removeListener('error', onerror);
+    if (EElistenerCount(dest, 'error') === 0) errorOrDestroy(dest, er);
+  }
+
+  // Make sure our error handler is attached before userland ones.
+  prependListener(dest, 'error', onerror);
+
+  // Both close and finish should trigger unpipe, but only once.
+  function onclose() {
+    dest.removeListener('finish', onfinish);
+    unpipe();
+  }
+  dest.once('close', onclose);
+  function onfinish() {
+    debug('onfinish');
+    dest.removeListener('close', onclose);
+    unpipe();
+  }
+  dest.once('finish', onfinish);
+  function unpipe() {
+    debug('unpipe');
+    src.unpipe(dest);
+  }
+
+  // tell the dest that it's being piped to
+  dest.emit('pipe', src);
+
+  // start the flow if it hasn't been started already.
+  if (!state.flowing) {
+    debug('pipe resume');
+    src.resume();
+  }
+  return dest;
+};
+function pipeOnDrain(src) {
+  return function pipeOnDrainFunctionResult() {
+    var state = src._readableState;
+    debug('pipeOnDrain', state.awaitDrain);
+    if (state.awaitDrain) state.awaitDrain--;
+    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {
+      state.flowing = true;
+      flow(src);
+    }
+  };
+}
+Readable.prototype.unpipe = function (dest) {
+  var state = this._readableState;
+  var unpipeInfo = {
+    hasUnpiped: false
+  };
+
+  // if we're not piping anywhere, then do nothing.
+  if (state.pipesCount === 0) return this;
+
+  // just one destination.  most common case.
+  if (state.pipesCount === 1) {
+    // passed in one, but it's not the right one.
+    if (dest && dest !== state.pipes) return this;
+    if (!dest) dest = state.pipes;
+
+    // got a match.
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
+    if (dest) dest.emit('unpipe', this, unpipeInfo);
+    return this;
+  }
+
+  // slow case. multiple pipe destinations.
+
+  if (!dest) {
+    // remove all.
+    var dests = state.pipes;
+    var len = state.pipesCount;
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
+    for (var i = 0; i < len; i++) dests[i].emit('unpipe', this, {
+      hasUnpiped: false
+    });
+    return this;
+  }
+
+  // try to find the right one.
+  var index = indexOf(state.pipes, dest);
+  if (index === -1) return this;
+  state.pipes.splice(index, 1);
+  state.pipesCount -= 1;
+  if (state.pipesCount === 1) state.pipes = state.pipes[0];
+  dest.emit('unpipe', this, unpipeInfo);
+  return this;
+};
+
+// set up data events if they are asked for
+// Ensure readable listeners eventually get something
+Readable.prototype.on = function (ev, fn) {
+  var res = Stream.prototype.on.call(this, ev, fn);
+  var state = this._readableState;
+  if (ev === 'data') {
+    // update readableListening so that resume() may be a no-op
+    // a few lines down. This is needed to support once('readable').
+    state.readableListening = this.listenerCount('readable') > 0;
+
+    // Try start flowing on next tick if stream isn't explicitly paused
+    if (state.flowing !== false) this.resume();
+  } else if (ev === 'readable') {
+    if (!state.endEmitted && !state.readableListening) {
+      state.readableListening = state.needReadable = true;
+      state.flowing = false;
+      state.emittedReadable = false;
+      debug('on readable', state.length, state.reading);
+      if (state.length) {
+        emitReadable(this);
+      } else if (!state.reading) {
+        process.nextTick(nReadingNextTick, this);
+      }
+    }
+  }
+  return res;
+};
+Readable.prototype.addListener = Readable.prototype.on;
+Readable.prototype.removeListener = function (ev, fn) {
+  var res = Stream.prototype.removeListener.call(this, ev, fn);
+  if (ev === 'readable') {
+    // We need to check if there is someone still listening to
+    // readable and reset the state. However this needs to happen
+    // after readable has been emitted but before I/O (nextTick) to
+    // support once('readable', fn) cycles. This means that calling
+    // resume within the same tick will have no
+    // effect.
+    process.nextTick(updateReadableListening, this);
+  }
+  return res;
+};
+Readable.prototype.removeAllListeners = function (ev) {
+  var res = Stream.prototype.removeAllListeners.apply(this, arguments);
+  if (ev === 'readable' || ev === undefined) {
+    // We need to check if there is someone still listening to
+    // readable and reset the state. However this needs to happen
+    // after readable has been emitted but before I/O (nextTick) to
+    // support once('readable', fn) cycles. This means that calling
+    // resume within the same tick will have no
+    // effect.
+    process.nextTick(updateReadableListening, this);
+  }
+  return res;
+};
+function updateReadableListening(self) {
+  var state = self._readableState;
+  state.readableListening = self.listenerCount('readable') > 0;
+  if (state.resumeScheduled && !state.paused) {
+    // flowing needs to be set to true now, otherwise
+    // the upcoming resume will not flow.
+    state.flowing = true;
+
+    // crude way to check if we should resume
+  } else if (self.listenerCount('data') > 0) {
+    self.resume();
+  }
+}
+function nReadingNextTick(self) {
+  debug('readable nexttick read 0');
+  self.read(0);
+}
+
+// pause() and resume() are remnants of the legacy readable stream API
+// If the user uses them, then switch into old mode.
+Readable.prototype.resume = function () {
+  var state = this._readableState;
+  if (!state.flowing) {
+    debug('resume');
+    // we flow only if there is no one listening
+    // for readable, but we still have to call
+    // resume()
+    state.flowing = !state.readableListening;
+    resume(this, state);
+  }
+  state.paused = false;
+  return this;
+};
+function resume(stream, state) {
+  if (!state.resumeScheduled) {
+    state.resumeScheduled = true;
+    process.nextTick(resume_, stream, state);
+  }
+}
+function resume_(stream, state) {
+  debug('resume', state.reading);
+  if (!state.reading) {
+    stream.read(0);
+  }
+  state.resumeScheduled = false;
+  stream.emit('resume');
+  flow(stream);
+  if (state.flowing && !state.reading) stream.read(0);
+}
+Readable.prototype.pause = function () {
+  debug('call pause flowing=%j', this._readableState.flowing);
+  if (this._readableState.flowing !== false) {
+    debug('pause');
+    this._readableState.flowing = false;
+    this.emit('pause');
+  }
+  this._readableState.paused = true;
+  return this;
+};
+function flow(stream) {
+  var state = stream._readableState;
+  debug('flow', state.flowing);
+  while (state.flowing && stream.read() !== null);
+}
+
+// wrap an old-style stream as the async data source.
+// This is *not* part of the readable stream interface.
+// It is an ugly unfortunate mess of history.
+Readable.prototype.wrap = function (stream) {
+  var _this = this;
+  var state = this._readableState;
+  var paused = false;
+  stream.on('end', function () {
+    debug('wrapped end');
+    if (state.decoder && !state.ended) {
+      var chunk = state.decoder.end();
+      if (chunk && chunk.length) _this.push(chunk);
+    }
+    _this.push(null);
+  });
+  stream.on('data', function (chunk) {
+    debug('wrapped data');
+    if (state.decoder) chunk = state.decoder.write(chunk);
+
+    // don't skip over falsy values in objectMode
+    if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;
+    var ret = _this.push(chunk);
+    if (!ret) {
+      paused = true;
+      stream.pause();
+    }
+  });
+
+  // proxy all the other methods.
+  // important when wrapping filters and duplexes.
+  for (var i in stream) {
+    if (this[i] === undefined && typeof stream[i] === 'function') {
+      this[i] = function methodWrap(method) {
+        return function methodWrapReturnFunction() {
+          return stream[method].apply(stream, arguments);
+        };
+      }(i);
+    }
+  }
+
+  // proxy certain important events.
+  for (var n = 0; n < kProxyEvents.length; n++) {
+    stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));
+  }
+
+  // when we try to consume some more bytes, simply unpause the
+  // underlying stream.
+  this._read = function (n) {
+    debug('wrapped _read', n);
+    if (paused) {
+      paused = false;
+      stream.resume();
+    }
+  };
+  return this;
+};
+if (typeof Symbol === 'function') {
+  Readable.prototype[Symbol.asyncIterator] = function () {
+    if (createReadableStreamAsyncIterator === undefined) {
+      createReadableStreamAsyncIterator = require('./internal/streams/async_iterator');
+    }
+    return createReadableStreamAsyncIterator(this);
+  };
+}
+Object.defineProperty(Readable.prototype, 'readableHighWaterMark', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._readableState.highWaterMark;
+  }
+});
+Object.defineProperty(Readable.prototype, 'readableBuffer', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._readableState && this._readableState.buffer;
+  }
+});
+Object.defineProperty(Readable.prototype, 'readableFlowing', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._readableState.flowing;
+  },
+  set: function set(state) {
+    if (this._readableState) {
+      this._readableState.flowing = state;
+    }
+  }
+});
+
+// exposed for testing purposes only.
+Readable._fromList = fromList;
+Object.defineProperty(Readable.prototype, 'readableLength', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._readableState.length;
+  }
+});
+
+// Pluck off n bytes from an array of buffers.
+// Length is the combined lengths of all the buffers in the list.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function fromList(n, state) {
+  // nothing buffered
+  if (state.length === 0) return null;
+  var ret;
+  if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {
+    // read it all, truncate the list
+    if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.first();else ret = state.buffer.concat(state.length);
+    state.buffer.clear();
+  } else {
+    // read part of list
+    ret = state.buffer.consume(n, state.decoder);
+  }
+  return ret;
+}
+function endReadable(stream) {
+  var state = stream._readableState;
+  debug('endReadable', state.endEmitted);
+  if (!state.endEmitted) {
+    state.ended = true;
+    process.nextTick(endReadableNT, state, stream);
+  }
+}
+function endReadableNT(state, stream) {
+  debug('endReadableNT', state.endEmitted, state.length);
+
+  // Check that we didn't get one last unshift.
+  if (!state.endEmitted && state.length === 0) {
+    state.endEmitted = true;
+    stream.readable = false;
+    stream.emit('end');
+    if (state.autoDestroy) {
+      // In case of duplex streams we need a way to detect
+      // if the writable side is ready for autoDestroy as well
+      var wState = stream._writableState;
+      if (!wState || wState.autoDestroy && wState.finished) {
+        stream.destroy();
+      }
+    }
+  }
+}
+if (typeof Symbol === 'function') {
+  Readable.from = function (iterable, opts) {
+    if (from === undefined) {
+      from = require('./internal/streams/from');
+    }
+    return from(Readable, iterable, opts);
+  };
+}
+function indexOf(xs, x) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    if (xs[i] === x) return i;
+  }
+  return -1;
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_transform.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_transform.js
new file mode 100644
index 0000000..1ccb715
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_transform.js
@@ -0,0 +1,190 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a transform stream is a readable/writable stream where you do
+// something with the data.  Sometimes it's called a "filter",
+// but that's not a great name for it, since that implies a thing where
+// some bits pass through, and others are simply ignored.  (That would
+// be a valid example of a transform, of course.)
+//
+// While the output is causally related to the input, it's not a
+// necessarily symmetric or synchronous transformation.  For example,
+// a zlib stream might take multiple plain-text writes(), and then
+// emit a single compressed chunk some time in the future.
+//
+// Here's how this works:
+//
+// The Transform stream has all the aspects of the readable and writable
+// stream classes.  When you write(chunk), that calls _write(chunk,cb)
+// internally, and returns false if there's a lot of pending writes
+// buffered up.  When you call read(), that calls _read(n) until
+// there's enough pending readable data buffered up.
+//
+// In a transform stream, the written data is placed in a buffer.  When
+// _read(n) is called, it transforms the queued up data, calling the
+// buffered _write cb's as it consumes chunks.  If consuming a single
+// written chunk would result in multiple output chunks, then the first
+// outputted bit calls the readcb, and subsequent chunks just go into
+// the read buffer, and will cause it to emit 'readable' if necessary.
+//
+// This way, back-pressure is actually determined by the reading side,
+// since _read has to be called to start processing a new chunk.  However,
+// a pathological inflate type of transform can cause excessive buffering
+// here.  For example, imagine a stream where every byte of input is
+// interpreted as an integer from 0-255, and then results in that many
+// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
+// 1kb of data being output.  In this case, you could write a very small
+// amount of input, and end up with a very large amount of output.  In
+// such a pathological inflating mechanism, there'd be no way to tell
+// the system to stop doing the transform.  A single 4MB write could
+// cause the system to run out of memory.
+//
+// However, even in such a pathological case, only a single written chunk
+// would be consumed, and then the rest would wait (un-transformed) until
+// the results of the previous transformed chunk were consumed.
+
+'use strict';
+
+module.exports = Transform;
+var _require$codes = require('../errors').codes,
+  ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
+  ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,
+  ERR_TRANSFORM_ALREADY_TRANSFORMING = _require$codes.ERR_TRANSFORM_ALREADY_TRANSFORMING,
+  ERR_TRANSFORM_WITH_LENGTH_0 = _require$codes.ERR_TRANSFORM_WITH_LENGTH_0;
+var Duplex = require('./_stream_duplex');
+require('inherits')(Transform, Duplex);
+function afterTransform(er, data) {
+  var ts = this._transformState;
+  ts.transforming = false;
+  var cb = ts.writecb;
+  if (cb === null) {
+    return this.emit('error', new ERR_MULTIPLE_CALLBACK());
+  }
+  ts.writechunk = null;
+  ts.writecb = null;
+  if (data != null)
+    // single equals check for both `null` and `undefined`
+    this.push(data);
+  cb(er);
+  var rs = this._readableState;
+  rs.reading = false;
+  if (rs.needReadable || rs.length < rs.highWaterMark) {
+    this._read(rs.highWaterMark);
+  }
+}
+function Transform(options) {
+  if (!(this instanceof Transform)) return new Transform(options);
+  Duplex.call(this, options);
+  this._transformState = {
+    afterTransform: afterTransform.bind(this),
+    needTransform: false,
+    transforming: false,
+    writecb: null,
+    writechunk: null,
+    writeencoding: null
+  };
+
+  // start out asking for a readable event once data is transformed.
+  this._readableState.needReadable = true;
+
+  // we have implemented the _read method, and done the other things
+  // that Readable wants before the first _read call, so unset the
+  // sync guard flag.
+  this._readableState.sync = false;
+  if (options) {
+    if (typeof options.transform === 'function') this._transform = options.transform;
+    if (typeof options.flush === 'function') this._flush = options.flush;
+  }
+
+  // When the writable side finishes, then flush out anything remaining.
+  this.on('prefinish', prefinish);
+}
+function prefinish() {
+  var _this = this;
+  if (typeof this._flush === 'function' && !this._readableState.destroyed) {
+    this._flush(function (er, data) {
+      done(_this, er, data);
+    });
+  } else {
+    done(this, null, null);
+  }
+}
+Transform.prototype.push = function (chunk, encoding) {
+  this._transformState.needTransform = false;
+  return Duplex.prototype.push.call(this, chunk, encoding);
+};
+
+// This is the part where you do stuff!
+// override this function in implementation classes.
+// 'chunk' is an input chunk.
+//
+// Call `push(newChunk)` to pass along transformed output
+// to the readable side.  You may call 'push' zero or more times.
+//
+// Call `cb(err)` when you are done with this chunk.  If you pass
+// an error, then that'll put the hurt on the whole operation.  If you
+// never call cb(), then you'll never get another chunk.
+Transform.prototype._transform = function (chunk, encoding, cb) {
+  cb(new ERR_METHOD_NOT_IMPLEMENTED('_transform()'));
+};
+Transform.prototype._write = function (chunk, encoding, cb) {
+  var ts = this._transformState;
+  ts.writecb = cb;
+  ts.writechunk = chunk;
+  ts.writeencoding = encoding;
+  if (!ts.transforming) {
+    var rs = this._readableState;
+    if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);
+  }
+};
+
+// Doesn't matter what the args are here.
+// _transform does all the work.
+// That we got here means that the readable side wants more data.
+Transform.prototype._read = function (n) {
+  var ts = this._transformState;
+  if (ts.writechunk !== null && !ts.transforming) {
+    ts.transforming = true;
+    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
+  } else {
+    // mark that we need a transform, so that any data that comes in
+    // will get processed, now that we've asked for it.
+    ts.needTransform = true;
+  }
+};
+Transform.prototype._destroy = function (err, cb) {
+  Duplex.prototype._destroy.call(this, err, function (err2) {
+    cb(err2);
+  });
+};
+function done(stream, er, data) {
+  if (er) return stream.emit('error', er);
+  if (data != null)
+    // single equals check for both `null` and `undefined`
+    stream.push(data);
+
+  // TODO(BridgeAR): Write a test for these two error cases
+  // if there's nothing in the write buffer, then that means
+  // that nothing more will ever be provided
+  if (stream._writableState.length) throw new ERR_TRANSFORM_WITH_LENGTH_0();
+  if (stream._transformState.transforming) throw new ERR_TRANSFORM_ALREADY_TRANSFORMING();
+  return stream.push(null);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_writable.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_writable.js
new file mode 100644
index 0000000..292415e
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/_stream_writable.js
@@ -0,0 +1,641 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// A bit simpler than readable streams.
+// Implement an async ._write(chunk, encoding, cb), and it'll handle all
+// the drain event emission and buffering.
+
+'use strict';
+
+module.exports = Writable;
+
+/* <replacement> */
+function WriteReq(chunk, encoding, cb) {
+  this.chunk = chunk;
+  this.encoding = encoding;
+  this.callback = cb;
+  this.next = null;
+}
+
+// It seems a linked list but it is not
+// there will be only 2 of these for each stream
+function CorkedRequest(state) {
+  var _this = this;
+  this.next = null;
+  this.entry = null;
+  this.finish = function () {
+    onCorkedFinish(_this, state);
+  };
+}
+/* </replacement> */
+
+/*<replacement>*/
+var Duplex;
+/*</replacement>*/
+
+Writable.WritableState = WritableState;
+
+/*<replacement>*/
+var internalUtil = {
+  deprecate: require('util-deprecate')
+};
+/*</replacement>*/
+
+/*<replacement>*/
+var Stream = require('./internal/streams/stream');
+/*</replacement>*/
+
+var Buffer = require('buffer').Buffer;
+var OurUint8Array = (typeof global !== 'undefined' ? global : typeof window !== 'undefined' ? window : typeof self !== 'undefined' ? self : {}).Uint8Array || function () {};
+function _uint8ArrayToBuffer(chunk) {
+  return Buffer.from(chunk);
+}
+function _isUint8Array(obj) {
+  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
+}
+var destroyImpl = require('./internal/streams/destroy');
+var _require = require('./internal/streams/state'),
+  getHighWaterMark = _require.getHighWaterMark;
+var _require$codes = require('../errors').codes,
+  ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,
+  ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
+  ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,
+  ERR_STREAM_CANNOT_PIPE = _require$codes.ERR_STREAM_CANNOT_PIPE,
+  ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED,
+  ERR_STREAM_NULL_VALUES = _require$codes.ERR_STREAM_NULL_VALUES,
+  ERR_STREAM_WRITE_AFTER_END = _require$codes.ERR_STREAM_WRITE_AFTER_END,
+  ERR_UNKNOWN_ENCODING = _require$codes.ERR_UNKNOWN_ENCODING;
+var errorOrDestroy = destroyImpl.errorOrDestroy;
+require('inherits')(Writable, Stream);
+function nop() {}
+function WritableState(options, stream, isDuplex) {
+  Duplex = Duplex || require('./_stream_duplex');
+  options = options || {};
+
+  // Duplex streams are both readable and writable, but share
+  // the same options object.
+  // However, some cases require setting options to different
+  // values for the readable and the writable sides of the duplex stream,
+  // e.g. options.readableObjectMode vs. options.writableObjectMode, etc.
+  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex;
+
+  // object stream flag to indicate whether or not this stream
+  // contains buffers or objects.
+  this.objectMode = !!options.objectMode;
+  if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode;
+
+  // the point at which write() starts returning false
+  // Note: 0 is a valid value, means that we always return false if
+  // the entire buffer is not flushed immediately on write()
+  this.highWaterMark = getHighWaterMark(this, options, 'writableHighWaterMark', isDuplex);
+
+  // if _final has been called
+  this.finalCalled = false;
+
+  // drain event flag.
+  this.needDrain = false;
+  // at the start of calling end()
+  this.ending = false;
+  // when end() has been called, and returned
+  this.ended = false;
+  // when 'finish' is emitted
+  this.finished = false;
+
+  // has it been destroyed
+  this.destroyed = false;
+
+  // should we decode strings into buffers before passing to _write?
+  // this is here so that some node-core streams can optimize string
+  // handling at a lower level.
+  var noDecode = options.decodeStrings === false;
+  this.decodeStrings = !noDecode;
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
+
+  // not an actual buffer we keep track of, but a measurement
+  // of how much we're waiting to get pushed to some underlying
+  // socket or file.
+  this.length = 0;
+
+  // a flag to see when we're in the middle of a write.
+  this.writing = false;
+
+  // when true all writes will be buffered until .uncork() call
+  this.corked = 0;
+
+  // a flag to be able to tell if the onwrite cb is called immediately,
+  // or on a later tick.  We set this to true at first, because any
+  // actions that shouldn't happen until "later" should generally also
+  // not happen before the first write call.
+  this.sync = true;
+
+  // a flag to know if we're processing previously buffered items, which
+  // may call the _write() callback in the same tick, so that we don't
+  // end up in an overlapped onwrite situation.
+  this.bufferProcessing = false;
+
+  // the callback that's passed to _write(chunk,cb)
+  this.onwrite = function (er) {
+    onwrite(stream, er);
+  };
+
+  // the callback that the user supplies to write(chunk,encoding,cb)
+  this.writecb = null;
+
+  // the amount that is being written when _write is called.
+  this.writelen = 0;
+  this.bufferedRequest = null;
+  this.lastBufferedRequest = null;
+
+  // number of pending user-supplied write callbacks
+  // this must be 0 before 'finish' can be emitted
+  this.pendingcb = 0;
+
+  // emit prefinish if the only thing we're waiting for is _write cbs
+  // This is relevant for synchronous Transform streams
+  this.prefinished = false;
+
+  // True if the error was already emitted and should not be thrown again
+  this.errorEmitted = false;
+
+  // Should close be emitted on destroy. Defaults to true.
+  this.emitClose = options.emitClose !== false;
+
+  // Should .destroy() be called after 'finish' (and potentially 'end')
+  this.autoDestroy = !!options.autoDestroy;
+
+  // count buffered requests
+  this.bufferedRequestCount = 0;
+
+  // allocate the first CorkedRequest, there is always
+  // one allocated and free to use, and we maintain at most two
+  this.corkedRequestsFree = new CorkedRequest(this);
+}
+WritableState.prototype.getBuffer = function getBuffer() {
+  var current = this.bufferedRequest;
+  var out = [];
+  while (current) {
+    out.push(current);
+    current = current.next;
+  }
+  return out;
+};
+(function () {
+  try {
+    Object.defineProperty(WritableState.prototype, 'buffer', {
+      get: internalUtil.deprecate(function writableStateBufferGetter() {
+        return this.getBuffer();
+      }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.', 'DEP0003')
+    });
+  } catch (_) {}
+})();
+
+// Test _writableState for inheritance to account for Duplex streams,
+// whose prototype chain only points to Readable.
+var realHasInstance;
+if (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {
+  realHasInstance = Function.prototype[Symbol.hasInstance];
+  Object.defineProperty(Writable, Symbol.hasInstance, {
+    value: function value(object) {
+      if (realHasInstance.call(this, object)) return true;
+      if (this !== Writable) return false;
+      return object && object._writableState instanceof WritableState;
+    }
+  });
+} else {
+  realHasInstance = function realHasInstance(object) {
+    return object instanceof this;
+  };
+}
+function Writable(options) {
+  Duplex = Duplex || require('./_stream_duplex');
+
+  // Writable ctor is applied to Duplexes, too.
+  // `realHasInstance` is necessary because using plain `instanceof`
+  // would return false, as no `_writableState` property is attached.
+
+  // Trying to use the custom `instanceof` for Writable here will also break the
+  // Node.js LazyTransform implementation, which has a non-trivial getter for
+  // `_writableState` that would lead to infinite recursion.
+
+  // Checking for a Stream.Duplex instance is faster here instead of inside
+  // the WritableState constructor, at least with V8 6.5
+  var isDuplex = this instanceof Duplex;
+  if (!isDuplex && !realHasInstance.call(Writable, this)) return new Writable(options);
+  this._writableState = new WritableState(options, this, isDuplex);
+
+  // legacy.
+  this.writable = true;
+  if (options) {
+    if (typeof options.write === 'function') this._write = options.write;
+    if (typeof options.writev === 'function') this._writev = options.writev;
+    if (typeof options.destroy === 'function') this._destroy = options.destroy;
+    if (typeof options.final === 'function') this._final = options.final;
+  }
+  Stream.call(this);
+}
+
+// Otherwise people can pipe Writable streams, which is just wrong.
+Writable.prototype.pipe = function () {
+  errorOrDestroy(this, new ERR_STREAM_CANNOT_PIPE());
+};
+function writeAfterEnd(stream, cb) {
+  var er = new ERR_STREAM_WRITE_AFTER_END();
+  // TODO: defer error events consistently everywhere, not just the cb
+  errorOrDestroy(stream, er);
+  process.nextTick(cb, er);
+}
+
+// Checks that a user-supplied chunk is valid, especially for the particular
+// mode the stream is in. Currently this means that `null` is never accepted
+// and undefined/non-string values are only allowed in object mode.
+function validChunk(stream, state, chunk, cb) {
+  var er;
+  if (chunk === null) {
+    er = new ERR_STREAM_NULL_VALUES();
+  } else if (typeof chunk !== 'string' && !state.objectMode) {
+    er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer'], chunk);
+  }
+  if (er) {
+    errorOrDestroy(stream, er);
+    process.nextTick(cb, er);
+    return false;
+  }
+  return true;
+}
+Writable.prototype.write = function (chunk, encoding, cb) {
+  var state = this._writableState;
+  var ret = false;
+  var isBuf = !state.objectMode && _isUint8Array(chunk);
+  if (isBuf && !Buffer.isBuffer(chunk)) {
+    chunk = _uint8ArrayToBuffer(chunk);
+  }
+  if (typeof encoding === 'function') {
+    cb = encoding;
+    encoding = null;
+  }
+  if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;
+  if (typeof cb !== 'function') cb = nop;
+  if (state.ending) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) {
+    state.pendingcb++;
+    ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb);
+  }
+  return ret;
+};
+Writable.prototype.cork = function () {
+  this._writableState.corked++;
+};
+Writable.prototype.uncork = function () {
+  var state = this._writableState;
+  if (state.corked) {
+    state.corked--;
+    if (!state.writing && !state.corked && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);
+  }
+};
+Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
+  // node::ParseEncoding() requires lower case.
+  if (typeof encoding === 'string') encoding = encoding.toLowerCase();
+  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new ERR_UNKNOWN_ENCODING(encoding);
+  this._writableState.defaultEncoding = encoding;
+  return this;
+};
+Object.defineProperty(Writable.prototype, 'writableBuffer', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState && this._writableState.getBuffer();
+  }
+});
+function decodeChunk(state, chunk, encoding) {
+  if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {
+    chunk = Buffer.from(chunk, encoding);
+  }
+  return chunk;
+}
+Object.defineProperty(Writable.prototype, 'writableHighWaterMark', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState.highWaterMark;
+  }
+});
+
+// if we're already writing something, then just put this
+// in the queue, and wait our turn.  Otherwise, call _write
+// If we return false, then we need a drain event, so set that flag.
+function writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) {
+  if (!isBuf) {
+    var newChunk = decodeChunk(state, chunk, encoding);
+    if (chunk !== newChunk) {
+      isBuf = true;
+      encoding = 'buffer';
+      chunk = newChunk;
+    }
+  }
+  var len = state.objectMode ? 1 : chunk.length;
+  state.length += len;
+  var ret = state.length < state.highWaterMark;
+  // we must ensure that previous needDrain will not be reset to false.
+  if (!ret) state.needDrain = true;
+  if (state.writing || state.corked) {
+    var last = state.lastBufferedRequest;
+    state.lastBufferedRequest = {
+      chunk: chunk,
+      encoding: encoding,
+      isBuf: isBuf,
+      callback: cb,
+      next: null
+    };
+    if (last) {
+      last.next = state.lastBufferedRequest;
+    } else {
+      state.bufferedRequest = state.lastBufferedRequest;
+    }
+    state.bufferedRequestCount += 1;
+  } else {
+    doWrite(stream, state, false, len, chunk, encoding, cb);
+  }
+  return ret;
+}
+function doWrite(stream, state, writev, len, chunk, encoding, cb) {
+  state.writelen = len;
+  state.writecb = cb;
+  state.writing = true;
+  state.sync = true;
+  if (state.destroyed) state.onwrite(new ERR_STREAM_DESTROYED('write'));else if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);
+  state.sync = false;
+}
+function onwriteError(stream, state, sync, er, cb) {
+  --state.pendingcb;
+  if (sync) {
+    // defer the callback if we are being called synchronously
+    // to avoid piling up things on the stack
+    process.nextTick(cb, er);
+    // this can emit finish, and it will always happen
+    // after error
+    process.nextTick(finishMaybe, stream, state);
+    stream._writableState.errorEmitted = true;
+    errorOrDestroy(stream, er);
+  } else {
+    // the caller expect this to happen before if
+    // it is async
+    cb(er);
+    stream._writableState.errorEmitted = true;
+    errorOrDestroy(stream, er);
+    // this can emit finish, but finish must
+    // always follow error
+    finishMaybe(stream, state);
+  }
+}
+function onwriteStateUpdate(state) {
+  state.writing = false;
+  state.writecb = null;
+  state.length -= state.writelen;
+  state.writelen = 0;
+}
+function onwrite(stream, er) {
+  var state = stream._writableState;
+  var sync = state.sync;
+  var cb = state.writecb;
+  if (typeof cb !== 'function') throw new ERR_MULTIPLE_CALLBACK();
+  onwriteStateUpdate(state);
+  if (er) onwriteError(stream, state, sync, er, cb);else {
+    // Check if we're actually ready to finish, but don't emit yet
+    var finished = needFinish(state) || stream.destroyed;
+    if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {
+      clearBuffer(stream, state);
+    }
+    if (sync) {
+      process.nextTick(afterWrite, stream, state, finished, cb);
+    } else {
+      afterWrite(stream, state, finished, cb);
+    }
+  }
+}
+function afterWrite(stream, state, finished, cb) {
+  if (!finished) onwriteDrain(stream, state);
+  state.pendingcb--;
+  cb();
+  finishMaybe(stream, state);
+}
+
+// Must force callback to be called on nextTick, so that we don't
+// emit 'drain' before the write() consumer gets the 'false' return
+// value, and has a chance to attach a 'drain' listener.
+function onwriteDrain(stream, state) {
+  if (state.length === 0 && state.needDrain) {
+    state.needDrain = false;
+    stream.emit('drain');
+  }
+}
+
+// if there's something in the buffer waiting, then process it
+function clearBuffer(stream, state) {
+  state.bufferProcessing = true;
+  var entry = state.bufferedRequest;
+  if (stream._writev && entry && entry.next) {
+    // Fast case, write everything using _writev()
+    var l = state.bufferedRequestCount;
+    var buffer = new Array(l);
+    var holder = state.corkedRequestsFree;
+    holder.entry = entry;
+    var count = 0;
+    var allBuffers = true;
+    while (entry) {
+      buffer[count] = entry;
+      if (!entry.isBuf) allBuffers = false;
+      entry = entry.next;
+      count += 1;
+    }
+    buffer.allBuffers = allBuffers;
+    doWrite(stream, state, true, state.length, buffer, '', holder.finish);
+
+    // doWrite is almost always async, defer these to save a bit of time
+    // as the hot path ends with doWrite
+    state.pendingcb++;
+    state.lastBufferedRequest = null;
+    if (holder.next) {
+      state.corkedRequestsFree = holder.next;
+      holder.next = null;
+    } else {
+      state.corkedRequestsFree = new CorkedRequest(state);
+    }
+    state.bufferedRequestCount = 0;
+  } else {
+    // Slow case, write chunks one-by-one
+    while (entry) {
+      var chunk = entry.chunk;
+      var encoding = entry.encoding;
+      var cb = entry.callback;
+      var len = state.objectMode ? 1 : chunk.length;
+      doWrite(stream, state, false, len, chunk, encoding, cb);
+      entry = entry.next;
+      state.bufferedRequestCount--;
+      // if we didn't call the onwrite immediately, then
+      // it means that we need to wait until it does.
+      // also, that means that the chunk and cb are currently
+      // being processed, so move the buffer counter past them.
+      if (state.writing) {
+        break;
+      }
+    }
+    if (entry === null) state.lastBufferedRequest = null;
+  }
+  state.bufferedRequest = entry;
+  state.bufferProcessing = false;
+}
+Writable.prototype._write = function (chunk, encoding, cb) {
+  cb(new ERR_METHOD_NOT_IMPLEMENTED('_write()'));
+};
+Writable.prototype._writev = null;
+Writable.prototype.end = function (chunk, encoding, cb) {
+  var state = this._writableState;
+  if (typeof chunk === 'function') {
+    cb = chunk;
+    chunk = null;
+    encoding = null;
+  } else if (typeof encoding === 'function') {
+    cb = encoding;
+    encoding = null;
+  }
+  if (chunk !== null && chunk !== undefined) this.write(chunk, encoding);
+
+  // .end() fully uncorks
+  if (state.corked) {
+    state.corked = 1;
+    this.uncork();
+  }
+
+  // ignore unnecessary end() calls.
+  if (!state.ending) endWritable(this, state, cb);
+  return this;
+};
+Object.defineProperty(Writable.prototype, 'writableLength', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState.length;
+  }
+});
+function needFinish(state) {
+  return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;
+}
+function callFinal(stream, state) {
+  stream._final(function (err) {
+    state.pendingcb--;
+    if (err) {
+      errorOrDestroy(stream, err);
+    }
+    state.prefinished = true;
+    stream.emit('prefinish');
+    finishMaybe(stream, state);
+  });
+}
+function prefinish(stream, state) {
+  if (!state.prefinished && !state.finalCalled) {
+    if (typeof stream._final === 'function' && !state.destroyed) {
+      state.pendingcb++;
+      state.finalCalled = true;
+      process.nextTick(callFinal, stream, state);
+    } else {
+      state.prefinished = true;
+      stream.emit('prefinish');
+    }
+  }
+}
+function finishMaybe(stream, state) {
+  var need = needFinish(state);
+  if (need) {
+    prefinish(stream, state);
+    if (state.pendingcb === 0) {
+      state.finished = true;
+      stream.emit('finish');
+      if (state.autoDestroy) {
+        // In case of duplex streams we need a way to detect
+        // if the readable side is ready for autoDestroy as well
+        var rState = stream._readableState;
+        if (!rState || rState.autoDestroy && rState.endEmitted) {
+          stream.destroy();
+        }
+      }
+    }
+  }
+  return need;
+}
+function endWritable(stream, state, cb) {
+  state.ending = true;
+  finishMaybe(stream, state);
+  if (cb) {
+    if (state.finished) process.nextTick(cb);else stream.once('finish', cb);
+  }
+  state.ended = true;
+  stream.writable = false;
+}
+function onCorkedFinish(corkReq, state, err) {
+  var entry = corkReq.entry;
+  corkReq.entry = null;
+  while (entry) {
+    var cb = entry.callback;
+    state.pendingcb--;
+    cb(err);
+    entry = entry.next;
+  }
+
+  // reuse the free corkReq.
+  state.corkedRequestsFree.next = corkReq;
+}
+Object.defineProperty(Writable.prototype, 'destroyed', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    if (this._writableState === undefined) {
+      return false;
+    }
+    return this._writableState.destroyed;
+  },
+  set: function set(value) {
+    // we ignore the value if the stream
+    // has not been initialized yet
+    if (!this._writableState) {
+      return;
+    }
+
+    // backward compatibility, the user is explicitly
+    // managing destroyed
+    this._writableState.destroyed = value;
+  }
+});
+Writable.prototype.destroy = destroyImpl.destroy;
+Writable.prototype._undestroy = destroyImpl.undestroy;
+Writable.prototype._destroy = function (err, cb) {
+  cb(err);
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/async_iterator.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/async_iterator.js
new file mode 100644
index 0000000..742c5a4
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/async_iterator.js
@@ -0,0 +1,180 @@
+'use strict';
+
+var _Object$setPrototypeO;
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+var finished = require('./end-of-stream');
+var kLastResolve = Symbol('lastResolve');
+var kLastReject = Symbol('lastReject');
+var kError = Symbol('error');
+var kEnded = Symbol('ended');
+var kLastPromise = Symbol('lastPromise');
+var kHandlePromise = Symbol('handlePromise');
+var kStream = Symbol('stream');
+function createIterResult(value, done) {
+  return {
+    value: value,
+    done: done
+  };
+}
+function readAndResolve(iter) {
+  var resolve = iter[kLastResolve];
+  if (resolve !== null) {
+    var data = iter[kStream].read();
+    // we defer if data is null
+    // we can be expecting either 'end' or
+    // 'error'
+    if (data !== null) {
+      iter[kLastPromise] = null;
+      iter[kLastResolve] = null;
+      iter[kLastReject] = null;
+      resolve(createIterResult(data, false));
+    }
+  }
+}
+function onReadable(iter) {
+  // we wait for the next tick, because it might
+  // emit an error with process.nextTick
+  process.nextTick(readAndResolve, iter);
+}
+function wrapForNext(lastPromise, iter) {
+  return function (resolve, reject) {
+    lastPromise.then(function () {
+      if (iter[kEnded]) {
+        resolve(createIterResult(undefined, true));
+        return;
+      }
+      iter[kHandlePromise](resolve, reject);
+    }, reject);
+  };
+}
+var AsyncIteratorPrototype = Object.getPrototypeOf(function () {});
+var ReadableStreamAsyncIteratorPrototype = Object.setPrototypeOf((_Object$setPrototypeO = {
+  get stream() {
+    return this[kStream];
+  },
+  next: function next() {
+    var _this = this;
+    // if we have detected an error in the meanwhile
+    // reject straight away
+    var error = this[kError];
+    if (error !== null) {
+      return Promise.reject(error);
+    }
+    if (this[kEnded]) {
+      return Promise.resolve(createIterResult(undefined, true));
+    }
+    if (this[kStream].destroyed) {
+      // We need to defer via nextTick because if .destroy(err) is
+      // called, the error will be emitted via nextTick, and
+      // we cannot guarantee that there is no error lingering around
+      // waiting to be emitted.
+      return new Promise(function (resolve, reject) {
+        process.nextTick(function () {
+          if (_this[kError]) {
+            reject(_this[kError]);
+          } else {
+            resolve(createIterResult(undefined, true));
+          }
+        });
+      });
+    }
+
+    // if we have multiple next() calls
+    // we will wait for the previous Promise to finish
+    // this logic is optimized to support for await loops,
+    // where next() is only called once at a time
+    var lastPromise = this[kLastPromise];
+    var promise;
+    if (lastPromise) {
+      promise = new Promise(wrapForNext(lastPromise, this));
+    } else {
+      // fast path needed to support multiple this.push()
+      // without triggering the next() queue
+      var data = this[kStream].read();
+      if (data !== null) {
+        return Promise.resolve(createIterResult(data, false));
+      }
+      promise = new Promise(this[kHandlePromise]);
+    }
+    this[kLastPromise] = promise;
+    return promise;
+  }
+}, _defineProperty(_Object$setPrototypeO, Symbol.asyncIterator, function () {
+  return this;
+}), _defineProperty(_Object$setPrototypeO, "return", function _return() {
+  var _this2 = this;
+  // destroy(err, cb) is a private API
+  // we can guarantee we have that here, because we control the
+  // Readable class this is attached to
+  return new Promise(function (resolve, reject) {
+    _this2[kStream].destroy(null, function (err) {
+      if (err) {
+        reject(err);
+        return;
+      }
+      resolve(createIterResult(undefined, true));
+    });
+  });
+}), _Object$setPrototypeO), AsyncIteratorPrototype);
+var createReadableStreamAsyncIterator = function createReadableStreamAsyncIterator(stream) {
+  var _Object$create;
+  var iterator = Object.create(ReadableStreamAsyncIteratorPrototype, (_Object$create = {}, _defineProperty(_Object$create, kStream, {
+    value: stream,
+    writable: true
+  }), _defineProperty(_Object$create, kLastResolve, {
+    value: null,
+    writable: true
+  }), _defineProperty(_Object$create, kLastReject, {
+    value: null,
+    writable: true
+  }), _defineProperty(_Object$create, kError, {
+    value: null,
+    writable: true
+  }), _defineProperty(_Object$create, kEnded, {
+    value: stream._readableState.endEmitted,
+    writable: true
+  }), _defineProperty(_Object$create, kHandlePromise, {
+    value: function value(resolve, reject) {
+      var data = iterator[kStream].read();
+      if (data) {
+        iterator[kLastPromise] = null;
+        iterator[kLastResolve] = null;
+        iterator[kLastReject] = null;
+        resolve(createIterResult(data, false));
+      } else {
+        iterator[kLastResolve] = resolve;
+        iterator[kLastReject] = reject;
+      }
+    },
+    writable: true
+  }), _Object$create));
+  iterator[kLastPromise] = null;
+  finished(stream, function (err) {
+    if (err && err.code !== 'ERR_STREAM_PREMATURE_CLOSE') {
+      var reject = iterator[kLastReject];
+      // reject if we are waiting for data in the Promise
+      // returned by next() and store the error
+      if (reject !== null) {
+        iterator[kLastPromise] = null;
+        iterator[kLastResolve] = null;
+        iterator[kLastReject] = null;
+        reject(err);
+      }
+      iterator[kError] = err;
+      return;
+    }
+    var resolve = iterator[kLastResolve];
+    if (resolve !== null) {
+      iterator[kLastPromise] = null;
+      iterator[kLastResolve] = null;
+      iterator[kLastReject] = null;
+      resolve(createIterResult(undefined, true));
+    }
+    iterator[kEnded] = true;
+  });
+  stream.on('readable', onReadable.bind(null, iterator));
+  return iterator;
+};
+module.exports = createReadableStreamAsyncIterator;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/buffer_list.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/buffer_list.js
new file mode 100644
index 0000000..69bda49
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/buffer_list.js
@@ -0,0 +1,183 @@
+'use strict';
+
+function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+var _require = require('buffer'),
+  Buffer = _require.Buffer;
+var _require2 = require('util'),
+  inspect = _require2.inspect;
+var custom = inspect && inspect.custom || 'inspect';
+function copyBuffer(src, target, offset) {
+  Buffer.prototype.copy.call(src, target, offset);
+}
+module.exports = /*#__PURE__*/function () {
+  function BufferList() {
+    _classCallCheck(this, BufferList);
+    this.head = null;
+    this.tail = null;
+    this.length = 0;
+  }
+  _createClass(BufferList, [{
+    key: "push",
+    value: function push(v) {
+      var entry = {
+        data: v,
+        next: null
+      };
+      if (this.length > 0) this.tail.next = entry;else this.head = entry;
+      this.tail = entry;
+      ++this.length;
+    }
+  }, {
+    key: "unshift",
+    value: function unshift(v) {
+      var entry = {
+        data: v,
+        next: this.head
+      };
+      if (this.length === 0) this.tail = entry;
+      this.head = entry;
+      ++this.length;
+    }
+  }, {
+    key: "shift",
+    value: function shift() {
+      if (this.length === 0) return;
+      var ret = this.head.data;
+      if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
+      --this.length;
+      return ret;
+    }
+  }, {
+    key: "clear",
+    value: function clear() {
+      this.head = this.tail = null;
+      this.length = 0;
+    }
+  }, {
+    key: "join",
+    value: function join(s) {
+      if (this.length === 0) return '';
+      var p = this.head;
+      var ret = '' + p.data;
+      while (p = p.next) ret += s + p.data;
+      return ret;
+    }
+  }, {
+    key: "concat",
+    value: function concat(n) {
+      if (this.length === 0) return Buffer.alloc(0);
+      var ret = Buffer.allocUnsafe(n >>> 0);
+      var p = this.head;
+      var i = 0;
+      while (p) {
+        copyBuffer(p.data, ret, i);
+        i += p.data.length;
+        p = p.next;
+      }
+      return ret;
+    }
+
+    // Consumes a specified amount of bytes or characters from the buffered data.
+  }, {
+    key: "consume",
+    value: function consume(n, hasStrings) {
+      var ret;
+      if (n < this.head.data.length) {
+        // `slice` is the same for buffers and strings.
+        ret = this.head.data.slice(0, n);
+        this.head.data = this.head.data.slice(n);
+      } else if (n === this.head.data.length) {
+        // First chunk is a perfect match.
+        ret = this.shift();
+      } else {
+        // Result spans more than one buffer.
+        ret = hasStrings ? this._getString(n) : this._getBuffer(n);
+      }
+      return ret;
+    }
+  }, {
+    key: "first",
+    value: function first() {
+      return this.head.data;
+    }
+
+    // Consumes a specified amount of characters from the buffered data.
+  }, {
+    key: "_getString",
+    value: function _getString(n) {
+      var p = this.head;
+      var c = 1;
+      var ret = p.data;
+      n -= ret.length;
+      while (p = p.next) {
+        var str = p.data;
+        var nb = n > str.length ? str.length : n;
+        if (nb === str.length) ret += str;else ret += str.slice(0, n);
+        n -= nb;
+        if (n === 0) {
+          if (nb === str.length) {
+            ++c;
+            if (p.next) this.head = p.next;else this.head = this.tail = null;
+          } else {
+            this.head = p;
+            p.data = str.slice(nb);
+          }
+          break;
+        }
+        ++c;
+      }
+      this.length -= c;
+      return ret;
+    }
+
+    // Consumes a specified amount of bytes from the buffered data.
+  }, {
+    key: "_getBuffer",
+    value: function _getBuffer(n) {
+      var ret = Buffer.allocUnsafe(n);
+      var p = this.head;
+      var c = 1;
+      p.data.copy(ret);
+      n -= p.data.length;
+      while (p = p.next) {
+        var buf = p.data;
+        var nb = n > buf.length ? buf.length : n;
+        buf.copy(ret, ret.length - n, 0, nb);
+        n -= nb;
+        if (n === 0) {
+          if (nb === buf.length) {
+            ++c;
+            if (p.next) this.head = p.next;else this.head = this.tail = null;
+          } else {
+            this.head = p;
+            p.data = buf.slice(nb);
+          }
+          break;
+        }
+        ++c;
+      }
+      this.length -= c;
+      return ret;
+    }
+
+    // Make sure the linked list only shows the minimal necessary information.
+  }, {
+    key: custom,
+    value: function value(_, options) {
+      return inspect(this, _objectSpread(_objectSpread({}, options), {}, {
+        // Only inspect one level.
+        depth: 0,
+        // It should not recurse.
+        customInspect: false
+      }));
+    }
+  }]);
+  return BufferList;
+}();
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/destroy.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/destroy.js
new file mode 100644
index 0000000..31a17c4
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/destroy.js
@@ -0,0 +1,96 @@
+'use strict';
+
+// undocumented cb() API, needed for core, not for public API
+function destroy(err, cb) {
+  var _this = this;
+  var readableDestroyed = this._readableState && this._readableState.destroyed;
+  var writableDestroyed = this._writableState && this._writableState.destroyed;
+  if (readableDestroyed || writableDestroyed) {
+    if (cb) {
+      cb(err);
+    } else if (err) {
+      if (!this._writableState) {
+        process.nextTick(emitErrorNT, this, err);
+      } else if (!this._writableState.errorEmitted) {
+        this._writableState.errorEmitted = true;
+        process.nextTick(emitErrorNT, this, err);
+      }
+    }
+    return this;
+  }
+
+  // we set destroyed to true before firing error callbacks in order
+  // to make it re-entrance safe in case destroy() is called within callbacks
+
+  if (this._readableState) {
+    this._readableState.destroyed = true;
+  }
+
+  // if this is a duplex stream mark the writable part as destroyed as well
+  if (this._writableState) {
+    this._writableState.destroyed = true;
+  }
+  this._destroy(err || null, function (err) {
+    if (!cb && err) {
+      if (!_this._writableState) {
+        process.nextTick(emitErrorAndCloseNT, _this, err);
+      } else if (!_this._writableState.errorEmitted) {
+        _this._writableState.errorEmitted = true;
+        process.nextTick(emitErrorAndCloseNT, _this, err);
+      } else {
+        process.nextTick(emitCloseNT, _this);
+      }
+    } else if (cb) {
+      process.nextTick(emitCloseNT, _this);
+      cb(err);
+    } else {
+      process.nextTick(emitCloseNT, _this);
+    }
+  });
+  return this;
+}
+function emitErrorAndCloseNT(self, err) {
+  emitErrorNT(self, err);
+  emitCloseNT(self);
+}
+function emitCloseNT(self) {
+  if (self._writableState && !self._writableState.emitClose) return;
+  if (self._readableState && !self._readableState.emitClose) return;
+  self.emit('close');
+}
+function undestroy() {
+  if (this._readableState) {
+    this._readableState.destroyed = false;
+    this._readableState.reading = false;
+    this._readableState.ended = false;
+    this._readableState.endEmitted = false;
+  }
+  if (this._writableState) {
+    this._writableState.destroyed = false;
+    this._writableState.ended = false;
+    this._writableState.ending = false;
+    this._writableState.finalCalled = false;
+    this._writableState.prefinished = false;
+    this._writableState.finished = false;
+    this._writableState.errorEmitted = false;
+  }
+}
+function emitErrorNT(self, err) {
+  self.emit('error', err);
+}
+function errorOrDestroy(stream, err) {
+  // We have tests that rely on errors being emitted
+  // in the same tick, so changing this is semver major.
+  // For now when you opt-in to autoDestroy we allow
+  // the error to be emitted nextTick. In a future
+  // semver major update we should change the default to this.
+
+  var rState = stream._readableState;
+  var wState = stream._writableState;
+  if (rState && rState.autoDestroy || wState && wState.autoDestroy) stream.destroy(err);else stream.emit('error', err);
+}
+module.exports = {
+  destroy: destroy,
+  undestroy: undestroy,
+  errorOrDestroy: errorOrDestroy
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/end-of-stream.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/end-of-stream.js
new file mode 100644
index 0000000..59c671b
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/end-of-stream.js
@@ -0,0 +1,86 @@
+// Ported from https://github.com/mafintosh/end-of-stream with
+// permission from the author, Mathias Buus (@mafintosh).
+
+'use strict';
+
+var ERR_STREAM_PREMATURE_CLOSE = require('../../../errors').codes.ERR_STREAM_PREMATURE_CLOSE;
+function once(callback) {
+  var called = false;
+  return function () {
+    if (called) return;
+    called = true;
+    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+      args[_key] = arguments[_key];
+    }
+    callback.apply(this, args);
+  };
+}
+function noop() {}
+function isRequest(stream) {
+  return stream.setHeader && typeof stream.abort === 'function';
+}
+function eos(stream, opts, callback) {
+  if (typeof opts === 'function') return eos(stream, null, opts);
+  if (!opts) opts = {};
+  callback = once(callback || noop);
+  var readable = opts.readable || opts.readable !== false && stream.readable;
+  var writable = opts.writable || opts.writable !== false && stream.writable;
+  var onlegacyfinish = function onlegacyfinish() {
+    if (!stream.writable) onfinish();
+  };
+  var writableEnded = stream._writableState && stream._writableState.finished;
+  var onfinish = function onfinish() {
+    writable = false;
+    writableEnded = true;
+    if (!readable) callback.call(stream);
+  };
+  var readableEnded = stream._readableState && stream._readableState.endEmitted;
+  var onend = function onend() {
+    readable = false;
+    readableEnded = true;
+    if (!writable) callback.call(stream);
+  };
+  var onerror = function onerror(err) {
+    callback.call(stream, err);
+  };
+  var onclose = function onclose() {
+    var err;
+    if (readable && !readableEnded) {
+      if (!stream._readableState || !stream._readableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
+      return callback.call(stream, err);
+    }
+    if (writable && !writableEnded) {
+      if (!stream._writableState || !stream._writableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
+      return callback.call(stream, err);
+    }
+  };
+  var onrequest = function onrequest() {
+    stream.req.on('finish', onfinish);
+  };
+  if (isRequest(stream)) {
+    stream.on('complete', onfinish);
+    stream.on('abort', onclose);
+    if (stream.req) onrequest();else stream.on('request', onrequest);
+  } else if (writable && !stream._writableState) {
+    // legacy streams
+    stream.on('end', onlegacyfinish);
+    stream.on('close', onlegacyfinish);
+  }
+  stream.on('end', onend);
+  stream.on('finish', onfinish);
+  if (opts.error !== false) stream.on('error', onerror);
+  stream.on('close', onclose);
+  return function () {
+    stream.removeListener('complete', onfinish);
+    stream.removeListener('abort', onclose);
+    stream.removeListener('request', onrequest);
+    if (stream.req) stream.req.removeListener('finish', onfinish);
+    stream.removeListener('end', onlegacyfinish);
+    stream.removeListener('close', onlegacyfinish);
+    stream.removeListener('finish', onfinish);
+    stream.removeListener('end', onend);
+    stream.removeListener('error', onerror);
+    stream.removeListener('close', onclose);
+  };
+}
+module.exports = eos;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/from-browser.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/from-browser.js
new file mode 100644
index 0000000..a4ce56f
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/from-browser.js
@@ -0,0 +1,3 @@
+module.exports = function () {
+  throw new Error('Readable.from is not available in the browser')
+};
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/from.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/from.js
new file mode 100644
index 0000000..0a34ee9
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/from.js
@@ -0,0 +1,52 @@
+'use strict';
+
+function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }
+function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }
+function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+var ERR_INVALID_ARG_TYPE = require('../../../errors').codes.ERR_INVALID_ARG_TYPE;
+function from(Readable, iterable, opts) {
+  var iterator;
+  if (iterable && typeof iterable.next === 'function') {
+    iterator = iterable;
+  } else if (iterable && iterable[Symbol.asyncIterator]) iterator = iterable[Symbol.asyncIterator]();else if (iterable && iterable[Symbol.iterator]) iterator = iterable[Symbol.iterator]();else throw new ERR_INVALID_ARG_TYPE('iterable', ['Iterable'], iterable);
+  var readable = new Readable(_objectSpread({
+    objectMode: true
+  }, opts));
+  // Reading boolean to protect against _read
+  // being called before last iteration completion.
+  var reading = false;
+  readable._read = function () {
+    if (!reading) {
+      reading = true;
+      next();
+    }
+  };
+  function next() {
+    return _next2.apply(this, arguments);
+  }
+  function _next2() {
+    _next2 = _asyncToGenerator(function* () {
+      try {
+        var _yield$iterator$next = yield iterator.next(),
+          value = _yield$iterator$next.value,
+          done = _yield$iterator$next.done;
+        if (done) {
+          readable.push(null);
+        } else if (readable.push(yield value)) {
+          next();
+        } else {
+          reading = false;
+        }
+      } catch (err) {
+        readable.destroy(err);
+      }
+    });
+    return _next2.apply(this, arguments);
+  }
+  return readable;
+}
+module.exports = from;
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/pipeline.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/pipeline.js
new file mode 100644
index 0000000..e6f3924
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/pipeline.js
@@ -0,0 +1,86 @@
+// Ported from https://github.com/mafintosh/pump with
+// permission from the author, Mathias Buus (@mafintosh).
+
+'use strict';
+
+var eos;
+function once(callback) {
+  var called = false;
+  return function () {
+    if (called) return;
+    called = true;
+    callback.apply(void 0, arguments);
+  };
+}
+var _require$codes = require('../../../errors').codes,
+  ERR_MISSING_ARGS = _require$codes.ERR_MISSING_ARGS,
+  ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED;
+function noop(err) {
+  // Rethrow the error if it exists to avoid swallowing it
+  if (err) throw err;
+}
+function isRequest(stream) {
+  return stream.setHeader && typeof stream.abort === 'function';
+}
+function destroyer(stream, reading, writing, callback) {
+  callback = once(callback);
+  var closed = false;
+  stream.on('close', function () {
+    closed = true;
+  });
+  if (eos === undefined) eos = require('./end-of-stream');
+  eos(stream, {
+    readable: reading,
+    writable: writing
+  }, function (err) {
+    if (err) return callback(err);
+    closed = true;
+    callback();
+  });
+  var destroyed = false;
+  return function (err) {
+    if (closed) return;
+    if (destroyed) return;
+    destroyed = true;
+
+    // request.destroy just do .end - .abort is what we want
+    if (isRequest(stream)) return stream.abort();
+    if (typeof stream.destroy === 'function') return stream.destroy();
+    callback(err || new ERR_STREAM_DESTROYED('pipe'));
+  };
+}
+function call(fn) {
+  fn();
+}
+function pipe(from, to) {
+  return from.pipe(to);
+}
+function popCallback(streams) {
+  if (!streams.length) return noop;
+  if (typeof streams[streams.length - 1] !== 'function') return noop;
+  return streams.pop();
+}
+function pipeline() {
+  for (var _len = arguments.length, streams = new Array(_len), _key = 0; _key < _len; _key++) {
+    streams[_key] = arguments[_key];
+  }
+  var callback = popCallback(streams);
+  if (Array.isArray(streams[0])) streams = streams[0];
+  if (streams.length < 2) {
+    throw new ERR_MISSING_ARGS('streams');
+  }
+  var error;
+  var destroys = streams.map(function (stream, i) {
+    var reading = i < streams.length - 1;
+    var writing = i > 0;
+    return destroyer(stream, reading, writing, function (err) {
+      if (!error) error = err;
+      if (err) destroys.forEach(call);
+      if (reading) return;
+      destroys.forEach(call);
+      callback(error);
+    });
+  });
+  return streams.reduce(pipe);
+}
+module.exports = pipeline;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/state.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/state.js
new file mode 100644
index 0000000..3fbf892
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/state.js
@@ -0,0 +1,22 @@
+'use strict';
+
+var ERR_INVALID_OPT_VALUE = require('../../../errors').codes.ERR_INVALID_OPT_VALUE;
+function highWaterMarkFrom(options, isDuplex, duplexKey) {
+  return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null;
+}
+function getHighWaterMark(state, options, duplexKey, isDuplex) {
+  var hwm = highWaterMarkFrom(options, isDuplex, duplexKey);
+  if (hwm != null) {
+    if (!(isFinite(hwm) && Math.floor(hwm) === hwm) || hwm < 0) {
+      var name = isDuplex ? duplexKey : 'highWaterMark';
+      throw new ERR_INVALID_OPT_VALUE(name, hwm);
+    }
+    return Math.floor(hwm);
+  }
+
+  // Default value
+  return state.objectMode ? 16 : 16 * 1024;
+}
+module.exports = {
+  getHighWaterMark: getHighWaterMark
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/stream-browser.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/stream-browser.js
new file mode 100644
index 0000000..9332a3f
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/stream-browser.js
@@ -0,0 +1 @@
+module.exports = require('events').EventEmitter;
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/stream.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/stream.js
new file mode 100644
index 0000000..ce2ad5b
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/lib/internal/streams/stream.js
@@ -0,0 +1 @@
+module.exports = require('stream');
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/package.json b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/package.json
new file mode 100644
index 0000000..ade59e7
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/package.json
@@ -0,0 +1,68 @@
+{
+  "name": "readable-stream",
+  "version": "3.6.2",
+  "description": "Streams3, a user-land copy of the stream library from Node.js",
+  "main": "readable.js",
+  "engines": {
+    "node": ">= 6"
+  },
+  "dependencies": {
+    "inherits": "^2.0.3",
+    "string_decoder": "^1.1.1",
+    "util-deprecate": "^1.0.1"
+  },
+  "devDependencies": {
+    "@babel/cli": "^7.2.0",
+    "@babel/core": "^7.2.0",
+    "@babel/polyfill": "^7.0.0",
+    "@babel/preset-env": "^7.2.0",
+    "airtap": "0.0.9",
+    "assert": "^1.4.0",
+    "bl": "^2.0.0",
+    "deep-strict-equal": "^0.2.0",
+    "events.once": "^2.0.2",
+    "glob": "^7.1.2",
+    "gunzip-maybe": "^1.4.1",
+    "hyperquest": "^2.1.3",
+    "lolex": "^2.6.0",
+    "nyc": "^11.0.0",
+    "pump": "^3.0.0",
+    "rimraf": "^2.6.2",
+    "tap": "^12.0.0",
+    "tape": "^4.9.0",
+    "tar-fs": "^1.16.2",
+    "util-promisify": "^2.1.0"
+  },
+  "scripts": {
+    "test": "tap -J --no-esm test/parallel/*.js test/ours/*.js",
+    "ci": "TAP=1 tap --no-esm test/parallel/*.js test/ours/*.js | tee test.tap",
+    "test-browsers": "airtap --sauce-connect --loopback airtap.local -- test/browser.js",
+    "test-browser-local": "airtap --open --local -- test/browser.js",
+    "cover": "nyc npm test",
+    "report": "nyc report --reporter=lcov",
+    "update-browser-errors": "babel -o errors-browser.js errors.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/nodejs/readable-stream"
+  },
+  "keywords": [
+    "readable",
+    "stream",
+    "pipe"
+  ],
+  "browser": {
+    "util": false,
+    "worker_threads": false,
+    "./errors": "./errors-browser.js",
+    "./readable.js": "./readable-browser.js",
+    "./lib/internal/streams/from.js": "./lib/internal/streams/from-browser.js",
+    "./lib/internal/streams/stream.js": "./lib/internal/streams/stream-browser.js"
+  },
+  "nyc": {
+    "include": [
+      "lib/**.js"
+    ]
+  },
+  "license": "MIT"
+}
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/readable-browser.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/readable-browser.js
new file mode 100644
index 0000000..adbf60d
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/readable-browser.js
@@ -0,0 +1,9 @@
+exports = module.exports = require('./lib/_stream_readable.js');
+exports.Stream = exports;
+exports.Readable = exports;
+exports.Writable = require('./lib/_stream_writable.js');
+exports.Duplex = require('./lib/_stream_duplex.js');
+exports.Transform = require('./lib/_stream_transform.js');
+exports.PassThrough = require('./lib/_stream_passthrough.js');
+exports.finished = require('./lib/internal/streams/end-of-stream.js');
+exports.pipeline = require('./lib/internal/streams/pipeline.js');
diff --git a/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/readable.js b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/readable.js
new file mode 100644
index 0000000..9e0ca12
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/node_modules/readable-stream/readable.js
@@ -0,0 +1,16 @@
+var Stream = require('stream');
+if (process.env.READABLE_STREAM === 'disable' && Stream) {
+  module.exports = Stream.Readable;
+  Object.assign(module.exports, Stream);
+  module.exports.Stream = Stream;
+} else {
+  exports = module.exports = require('./lib/_stream_readable.js');
+  exports.Stream = Stream || exports;
+  exports.Readable = exports;
+  exports.Writable = require('./lib/_stream_writable.js');
+  exports.Duplex = require('./lib/_stream_duplex.js');
+  exports.Transform = require('./lib/_stream_transform.js');
+  exports.PassThrough = require('./lib/_stream_passthrough.js');
+  exports.finished = require('./lib/internal/streams/end-of-stream.js');
+  exports.pipeline = require('./lib/internal/streams/pipeline.js');
+}
diff --git a/mqtt-backend/node_modules/aedes-packet/package.json b/mqtt-backend/node_modules/aedes-packet/package.json
new file mode 100644
index 0000000..ef2e88b
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/package.json
@@ -0,0 +1,80 @@
+{
+  "name": "aedes-packet",
+  "version": "3.0.0",
+  "description": "Basic data structure for packets in Aedes ",
+  "main": "packet.js",
+  "types": "packet.d.ts",
+  "scripts": {
+    "lint": "npm run lint:standard && npm run lint:typescript && npm run lint:markdown",
+    "lint:standard": "standard --verbose | snazzy",
+    "lint:typescript": "standard --parser @typescript-eslint/parser --plugin @typescript-eslint/eslint-plugin test/types/*.ts packet.d.ts",
+    "lint:markdown": "markdownlint README.md",
+    "unit": "tap test.js",
+    "typescript": "tsc --project ./test/types/tsconfig.json",
+    "test": "npm run lint && npm run unit && npm run typescript",
+    "test:ci": "npm run test",
+    "license-checker": "license-checker --production --onlyAllow='MIT;ISC;BSD-3-Clause;BSD-2-Clause'",
+    "release": "read -p 'GITHUB_TOKEN: ' GITHUB_TOKEN && export GITHUB_TOKEN=$GITHUB_TOKEN && release-it --disable-metrics"
+  },
+  "release-it": {
+    "github": {
+      "release": true
+    },
+    "git": {
+      "tagName": "v${version}"
+    },
+    "hooks": {
+      "before:init": [
+        "npm run test"
+      ]
+    },
+    "npm": {
+      "publish": true
+    }
+  },
+  "pre-commit": [
+    "test"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/moscajs/aedes-packet.git"
+  },
+  "keywords": [
+    "mqtt",
+    "packet",
+    "broker",
+    "aedes"
+  ],
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "contributors": [
+    {
+      "name": "Gnought",
+      "url": "https://github.com/gnought"
+    }
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/moscajs/aedes-packet/issues"
+  },
+  "homepage": "https://github.com/moscajs/aedes-packet#readme",
+  "engines": {
+    "node": ">=14"
+  },
+  "dependencies": {
+    "mqtt-packet": "^7.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^17.0.0",
+    "@typescript-eslint/eslint-plugin": "^4.17.0",
+    "@typescript-eslint/parser": "^4.17.0",
+    "faucet": "0.0.1",
+    "license-checker": "^25.0.1",
+    "markdownlint-cli": "^0.29.0",
+    "pre-commit": "^1.2.2",
+    "release-it": "^15.0.0",
+    "snazzy": "^9.0.0",
+    "standard": "^16.0.3",
+    "tap": "^15.2.3",
+    "typescript": "^4.6.4"
+  }
+}
diff --git a/mqtt-backend/node_modules/aedes-packet/packet.d.ts b/mqtt-backend/node_modules/aedes-packet/packet.d.ts
new file mode 100644
index 0000000..a5f5b2d
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/packet.d.ts
@@ -0,0 +1,19 @@
+/* eslint no-unused-vars: 0 */
+/* eslint no-undef: 0 */
+/* eslint space-infix-ops: 0 */
+
+/// <reference types="node" />
+
+import { Packet as IPacket } from 'mqtt-packet'
+
+declare namespace aedes {
+
+  type AedesPacket = IPacket & {
+    brokerId: string
+    brokerCounter: number
+  }
+
+  function Packet(object?: AedesPacket) : aedes.AedesPacket
+}
+
+export = aedes
diff --git a/mqtt-backend/node_modules/aedes-packet/packet.js b/mqtt-backend/node_modules/aedes-packet/packet.js
new file mode 100644
index 0000000..0202d40
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/packet.js
@@ -0,0 +1,24 @@
+'use strict'
+
+function Packet (original, broker) {
+  if (Object.prototype.hasOwnProperty.call(original, 'clientId')) this.clientId = original.clientId
+  if (Object.prototype.hasOwnProperty.call(original, 'nl')) this.nl = original.nl
+
+  this.cmd = original.cmd || 'publish'
+  this.brokerId = original.brokerId || (broker && broker.id)
+  this.brokerCounter = original.brokerCounter || (broker ? (++broker.counter) : 0)
+  this.topic = original.topic
+  this.payload = original.payload || Buffer.alloc(0)
+  this.qos = original.qos || 0
+  this.retain = original.retain || false
+  this.dup = original.dup || false
+  // [MQTT-2.3.1-5]
+  if (this.qos > 0 || this.cmd !== 'publish') {
+    //  [MQTT-2.3.1-1]
+    // This is packet identifier uniquely identifies a message as it flows between
+    // client and broker. It is only relevant for QoS levels greater than 0
+    this.messageId = undefined
+  }
+}
+
+module.exports = Packet
diff --git a/mqtt-backend/node_modules/aedes-packet/test.js b/mqtt-backend/node_modules/aedes-packet/test.js
new file mode 100644
index 0000000..86e76aa
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/test.js
@@ -0,0 +1,166 @@
+'use strict'
+
+const { test } = require('tap')
+const Packet = require('./')
+
+test('Packet defaults - PUBLISH, QoS 0', function (t) {
+  const instance = new Packet({})
+  t.equal(instance.cmd, 'publish')
+  t.equal(instance.brokerId, undefined)
+  t.equal(instance.brokerCounter, 0)
+  t.equal(instance.topic, undefined)
+  t.same(instance.payload, Buffer.alloc(0))
+  t.equal(instance.qos, 0)
+  t.equal(instance.dup, false)
+  t.equal(instance.retain, false)
+  t.notOk(Object.prototype.hasOwnProperty.call(instance, 'messageId'))
+  t.end()
+})
+
+test('Packet defaults - PUBREL, QoS 0', function (t) {
+  const instance = new Packet({ cmd: 'pubrel' })
+  t.equal(instance.cmd, 'pubrel')
+  t.equal(instance.brokerId, undefined)
+  t.equal(instance.brokerCounter, 0)
+  t.equal(instance.topic, undefined)
+  t.same(instance.payload, Buffer.alloc(0))
+  t.equal(instance.qos, 0)
+  t.equal(instance.dup, false)
+  t.equal(instance.retain, false)
+  t.ok(Object.prototype.hasOwnProperty.call(instance, 'messageId'))
+  t.equal(instance.messageId, undefined)
+  t.end()
+})
+
+test('Packet defaults - PUBLISH, QoS 1', function (t) {
+  const instance = new Packet({ qos: 1 })
+  t.equal(instance.cmd, 'publish')
+  t.equal(instance.brokerId, undefined)
+  t.equal(instance.brokerCounter, 0)
+  t.equal(instance.topic, undefined)
+  t.same(instance.payload, Buffer.alloc(0))
+  t.equal(instance.qos, 1)
+  t.equal(instance.dup, false)
+  t.equal(instance.retain, false)
+  t.ok(Object.prototype.hasOwnProperty.call(instance, 'messageId'))
+  t.equal(instance.messageId, undefined)
+  t.end()
+})
+
+test('Packet defaults - PUBLISH, dup=true', function (t) {
+  const instance = new Packet({ dup: true })
+  t.equal(instance.cmd, 'publish')
+  t.equal(instance.brokerId, undefined)
+  t.equal(instance.brokerCounter, 0)
+  t.equal(instance.topic, undefined)
+  t.same(instance.payload, Buffer.alloc(0))
+  t.equal(instance.qos, 0)
+  t.equal(instance.dup, true)
+  t.equal(instance.retain, false)
+  t.equal(instance.messageId, undefined)
+  t.end()
+})
+
+test('Packet copies over most data', function (t) {
+  const original = {
+    cmd: 'pubrel',
+    brokerId: 'A56c',
+    brokerCounter: 42,
+    topic: 'hello',
+    payload: 'world',
+    qos: 2,
+    dup: true,
+    retain: true,
+    messageId: 24
+  }
+  const instance = new Packet(original)
+  const expected = {
+    cmd: 'pubrel',
+    brokerId: 'A56c',
+    brokerCounter: 42,
+    topic: 'hello',
+    payload: 'world',
+    qos: 2,
+    dup: true,
+    retain: true
+  }
+
+  t.ok(Object.prototype.hasOwnProperty.call(instance, 'messageId'))
+  t.equal(instance.messageId, undefined)
+  delete instance.messageId
+  t.same(instance, expected)
+  t.end()
+})
+
+test('Packet fills in broker data', function (t) {
+  const broker = {
+    id: 'A56c',
+    counter: 41
+  }
+  const original = {
+    cmd: 'pubrel',
+    topic: 'hello',
+    payload: 'world',
+    qos: 2,
+    retain: true,
+    messageId: 24
+  }
+  const instance = new Packet(original, broker)
+  const expected = {
+    cmd: 'pubrel',
+    brokerId: 'A56c',
+    brokerCounter: 42,
+    topic: 'hello',
+    payload: 'world',
+    qos: 2,
+    dup: false,
+    retain: true
+  }
+
+  t.ok(Object.prototype.hasOwnProperty.call(instance, 'messageId'))
+  t.equal(instance.messageId, undefined)
+  delete instance.messageId
+  t.same(instance, expected)
+  t.end()
+})
+
+test('Packet copies clientId and nl if they exist', function (t) {
+  const original = {
+    clientId: 'client-id',
+    nl: false
+  }
+  const instance = new Packet(original)
+  const expected = {
+    clientId: 'client-id',
+    nl: false,
+    cmd: 'publish',
+    brokerId: undefined,
+    brokerCounter: 0,
+    topic: undefined,
+    payload: Buffer.alloc(0),
+    qos: 0,
+    dup: false,
+    retain: false
+  }
+
+  t.same(instance, expected)
+  t.end()
+})
+
+test('Packet does not copy clientId and nl if they dont exist', function (t) {
+  const original = {}
+  const instance = new Packet(original)
+  const expected = {
+    cmd: 'publish',
+    brokerId: undefined,
+    brokerCounter: 0,
+    topic: undefined,
+    payload: Buffer.alloc(0),
+    qos: 0,
+    dup: false,
+    retain: false
+  }
+
+  t.same(instance, expected)
+  t.end()
+})
diff --git a/mqtt-backend/node_modules/aedes-packet/test/types/index.ts b/mqtt-backend/node_modules/aedes-packet/test/types/index.ts
new file mode 100644
index 0000000..d276b09
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/test/types/index.ts
@@ -0,0 +1,21 @@
+/* eslint no-unused-vars: 0 */
+/* eslint no-undef: 0 */
+
+import { Packet } from '../../packet'
+
+let p = Packet()
+p = Packet({
+  cmd: 'publish',
+  topic: 'hello',
+  payload: Buffer.from('world'),
+  qos: 0,
+  dup: false,
+  retain: false,
+  brokerId: 'afds8f',
+  brokerCounter: 10
+})
+p = Packet({
+  cmd: 'pingresp',
+  brokerId: 'ab7d9',
+  brokerCounter: 3
+})
diff --git a/mqtt-backend/node_modules/aedes-packet/test/types/tsconfig.json b/mqtt-backend/node_modules/aedes-packet/test/types/tsconfig.json
new file mode 100644
index 0000000..7914842
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-packet/test/types/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "target": "es6",
+    "noEmit": true,
+    "strict": true
+  },
+  "files": [
+    "./index.ts"
+  ]
+}
diff --git a/mqtt-backend/node_modules/aedes-persistence/.github/workflows/ci.yml b/mqtt-backend/node_modules/aedes-persistence/.github/workflows/ci.yml
new file mode 100644
index 0000000..c5ec5c7
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-persistence/.github/workflows/ci.yml
@@ -0,0 +1,50 @@
+name: ci
+
+on: 
+  push:
+    branches:
+      - main
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [14.x, 16.x, '*']
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Check licenses
+        run: |
+          npm run license-checker
+
+      - name: Run tests
+        run: |
+          npm run test:ci
+
+      - name: Coveralls Parallel
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.github_token }}
+          parallel: true
+
+  coverage:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Coveralls Finished
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          parallel-finished: true
diff --git a/mqtt-backend/node_modules/aedes-persistence/LICENSE b/mqtt-backend/node_modules/aedes-persistence/LICENSE
new file mode 100644
index 0000000..8650273
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-persistence/LICENSE
@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) Aedes Contributors
+Copyright (c) 2015-2020 Matteo Collina, http://matteocollina.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes-persistence/README.md b/mqtt-backend/node_modules/aedes-persistence/README.md
new file mode 100644
index 0000000..b60d30d
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-persistence/README.md
@@ -0,0 +1,304 @@
+# aedes-persistence
+![](https://github.com/moscajs/aedes-persistence/workflows/ci/badge.svg)
+[![Dependencies Status](https://david-dm.org/moscajs/aedes-persistence/status.svg)](https://david-dm.org/moscajs/aedes-persistence)
+[![devDependencies Status](https://david-dm.org/moscajs/aedes-persistence/dev-status.svg)](https://david-dm.org/moscajs/aedes-persistence?type=dev)
+<br/>
+[![Known Vulnerabilities](https://snyk.io/test/github/moscajs/aedes-persistence/badge.svg)](https://snyk.io/test/github/moscajs/aedes-persistence)
+[![Coverage Status](https://coveralls.io/repos/moscajs/aedes-persistence/badge.svg?branch=master&service=github)](https://coveralls.io/github/moscajs/aedes-persistence?branch=master)
+[![NPM version](https://img.shields.io/npm/v/aedes-persistence.svg?style=flat)](https://www.npmjs.com/package/aedes-persistence)
+[![NPM downloads](https://img.shields.io/npm/dm/aedes-persistence.svg?style=flat)](https://www.npmjs.com/package/aedes-persistence)
+
+The spec for an [Aedes](http://npm.im/aedes) persistence, with abstract
+tests and a fast in-memory implementation.
+
+* [Install](#install)
+* [API](#api)
+* [Implement another persistence](#implement)
+* [License](#license)
+
+<a name="install"></a>
+## Install
+To install aedes-persistence, simply use npm:
+
+```
+npm install aedes-persistence --save
+```
+
+<a name="api"></a>
+## API
+
+  * <a href="#constructor"><code><b>persistence()</b></code></a>
+  * <a href="#storeRetained"><code>instance.<b>storeRetained()</b></code></a>
+  * <a href="#createRetainedStream"><code>instance.<b>createRetainedStream()</b></code></a>
+  * <a href="#createRetainedStreamCombi"><code>instance.<b>createRetainedStreamCombi()</b></code></a>
+  * <a href="#addSubscriptions"><code>instance.<b>addSubscriptions()</b></code></a>
+  * <a href="#removeSubscriptions"><code>instance.<b>removeSubscriptions()</b></code></a>
+  * <a href="#subscriptionsByClient"><code>instance.<b>subscriptionsByClient()</b></code></a>
+  * <a href="#countOffline"><code>instance.<b>countOffline()</b></code></a>
+  * <a href="#subscriptionsByTopic"><code>instance.<b>subscriptionsByTopic()</b></code></a>
+  * <a href="#cleanSubscriptions"><code>instance.<b>cleanSubscriptions()</b></code></a>
+  * <a href="#outgoingEnqueue"><code>instance.<b>outgoingEnqueue()</b></code></a>
+  * <a href="#outgoingEnqueueCombi"><code>instance.<b>outgoingEnqueueCombi()</b></code></a>
+  * <a href="#outgoingUpdate"><code>instance.<b>outgoingUpdate()</b></code></a>
+  * <a href="#outgoingClearMessageId"><code>instance.<b>outgoingClearMessageId()</b></code></a>
+  * <a href="#outgoingStream"><code>instance.<b>outgoingStream()</b></code></a>
+  * <a href="#incomingStorePacket"><code>instance.<b>incomingStorePacket()</b></code></a>
+  * <a href="#incomingGetPacket"><code>instance.<b>incomingGetPacket()</b></code></a>
+  * <a href="#incomingDelPacket"><code>instance.<b>incomingDelPacket()</b></code></a>
+  * <a href="#putWill"><code>instance.<b>putWill()</b></code></a>
+  * <a href="#getWill"><code>instance.<b>getWill()</b></code></a>
+  * <a href="#delWill"><code>instance.<b>delWill()</b></code></a>
+  * <a href="#streamWill"><code>instance.<b>streamWill()</b></code></a>
+  * <a href="#getClientList"><code>instance.<b>getClientList()</b></code></a>
+  * <a href="#destroy"><code>instance.<b>destroy()</b></code></a>
+
+-------------------------------------------------------
+<a name="constructor"></a>
+### persistence([opts])
+
+Creates a new instance of a persistence, that is already ready to
+operate. The default implementation is in-memory only.
+
+-------------------------------------------------------
+<a name="storeRetained"></a>
+### instance.storeRetained(packet, callback(err))
+
+Store a retained message, calls the callback when it was saved.
+
+-------------------------------------------------------
+<a name="createRetainedStream"></a>
+### instance.createRetainedStream(pattern)
+
+Return a stream that will load all retained messages matching the given
+pattern (according to the MQTT spec) asynchronously. Deprecated.
+
+-------------------------------------------------------
+<a name="createRetainedStreamCombi"></a>
+### instance.createRetainedStreamCombi(patterns)
+
+Return a stream that will load all retained messages matching given
+patterns (according to the MQTT spec) asynchronously.
+
+-------------------------------------------------------
+<a name="addSubscriptions"></a>
+### instance.addSubscriptions(client, subscriptions, callback(err, client))
+
+Add the given offline subscriptions for the given
+[Client](https://github.com/moscajs/aedes#client). The client __must__
+have connected with `clean: false`, as this is not checked here.
+This is called when a client issue a SUBSCRIBE packet.
+
+`subscriptions` is in the same format of the `subscribe` property in the
+[SUBSCRIBE](https://github.com/mqttjs/mqtt-packet#subscribe) packet:
+
+```js
+[{
+  topic: 'hello/world',
+  qos: 1,
+}, {
+  topic: 'hello/#',
+  qos: 2,
+}]
+```
+
+-------------------------------------------------------
+<a name="removeSubscriptions"></a>
+### instance.removeSubscriptions(client, subscriptions, callback(err, client))
+
+The inverse of [`addSubscriptions`](#addSubscriptions) but subscriptions is an array of topic names.
+
+-------------------------------------------------------
+<a name="subscriptionsByClient"></a>
+### instance.subscriptionsByClient(client, callback(err, subscriptions, client))
+
+Returns all the offline subscriptions for the given client. Called when
+a client with `clean: false` connects to restore its subscriptions.
+
+`subscriptions` is in the same format of the `subscribe` property in the
+[SUBSCRIBE](https://github.com/mqttjs/mqtt-packet#subscribe) packet:
+
+```js
+[{
+  topic: 'hello/world',
+  qos: 1,
+}, {
+  topic: 'hello/#',
+  qos: 2,
+}]
+```
+
+-------------------------------------------------------
+<a name="countOffline"></a>
+### instance.countOffline(cb(err, numOfSubscriptions, numOfClients))
+
+Returns the number of offline subscriptions and the number of offline
+clients.
+
+-------------------------------------------------------
+<a name="subscriptionsByTopic"></a>
+### instance.subscriptionsByTopic(pattern, callback(err, subscriptions))
+
+Returns all the offline subscriptions matching the given pattern. Called when
+a PUBLISH with `qos: 1` or `qos: 2` is received.
+
+The subscriptions are in the format:
+
+```js
+{
+  clientId: client.id,
+  topic: sub.topic,
+  qos: sub.qos
+}
+```
+
+-------------------------------------------------------
+<a name="cleanSubscriptions"></a>
+### instance.cleanSubscriptions(client, callback(err, client))
+
+Removes all offline subscriptions for a given client.
+
+-------------------------------------------------------
+<a name="outgoingEnqueue"></a>
+### instance.outgoingEnqueue(subscription, packet, callback(err))
+
+Enqueue a potentially offline delivery. `subscription` is one of the
+objects returned by [`subscriptionsByTopic`](#subscriptionsByTopic). Deprecated.
+
+-------------------------------------------------------
+<a name="outgoingEnqueueCombi"></a>
+### instance.outgoingEnqueueCombi(subscriptions, packet, callback(err))
+
+Enqueue a potentially offline delivery. `subscriptions` is the whole subscriptions
+objects returned by [`subscriptionsByTopic`](#subscriptionsByTopic).
+
+-------------------------------------------------------
+<a name="outgoingUpdate"></a>
+### instance.outgoingUpdate(client, packet, callback(err))
+
+Called before a (potentially) offline packet is delivered, the caller
+should update the `packet.messageId` before updating.
+
+-------------------------------------------------------
+<a name="outgoingClearMessageId"></a>
+### instance.outgoingClearMessageId(client, packet, callback(err, packet))
+
+Removes a packet with the given `messageId` (passing a PUBACK is ok)
+from the persistence. Passes back original packet to the callback.
+
+-------------------------------------------------------
+<a name="outgoingStream"></a>
+### instance.outgoingStream(client)
+
+Return a stream that will load all offline messages for the given client asynchronously.
+
+-------------------------------------------------------
+<a name="incomingStorePacket"></a>
+### instance.incomingStorePacket(client, packet, cb(err, packet))
+
+Store an incoming packet for the given client. Used for QoS 2.
+
+-------------------------------------------------------
+<a name="incomingGetPacket"></a>
+### instance.incomingGetPacket(client, packet, cb(err, packet))
+
+Retrieve an incoming packet with the same `messageId` for the given client. Used for QoS 2.
+
+-------------------------------------------------------
+<a name="incomingDelPacket"></a>
+### instance.incomingDelPacket(client, packet, cb(err, packet))
+
+Deletes incoming packet with the same `messageId` for the given client. Used for QoS 2.
+
+-------------------------------------------------------
+<a name="putWill"></a>
+### instance.putWill(client, packet, cb(err))
+
+Stores the will of a client. Used to support multi-broker environments
+and to not lose wills in case of a crash.
+
+-------------------------------------------------------
+<a name="getWill"></a>
+### instance.getWill(client, packet, cb(err))
+
+Retrieves the will of a client. Used to support multi-broker environments
+and to not lose wills in case of a crash.
+
+-------------------------------------------------------
+<a name="delWill"></a>
+### instance.delWill(client, packet, cb(err))
+
+Removes the will of a client. Used to support multi-broker environments
+and to not lose wills in case of a crash.
+
+-------------------------------------------------------
+<a name="streamWill"></a>
+### instance.streamWill(brokers)
+
+Streams all the wills for the given brokers. The brokers are in the
+format:
+
+```js
+{
+  mybroker: {
+    brokerId: 'mybroker'
+  }
+}
+```
+
+-------------------------------------------------------
+<a name="getCLientList"></a>
+### instance.getClientList(topic)
+
+Returns a stream which has all the clientIds subscribed to the
+specified topic
+
+<a name="destroy"></a>
+### instance.destroy(cb(err))
+
+Destroy current persistence. Use callback `cb(err)` to catch errors if any
+
+<a name="implement"></a>
+## Implement another persistence
+
+A persistence needs to pass all tests defined in
+[./abstract.js](./abstract.js). You can import and use that test suite
+in the following manner:
+
+```js
+const test = require('tape').test
+const myperst = require('./')
+const abs = require('aedes-persistence/abstract')
+
+abs({
+  test: test,
+  persistence: myperst
+})
+```
+
+If you require some async stuff before returning, a callback is also
+supported:
+
+```js
+const test = require('tape').test
+const myperst = require('./')
+const abs = require('aedes-persistence/abstract')
+const clean = require('./clean') // invented module
+
+abs({
+  test: test,
+  buildEmitter: require('mymqemitter'), // optional
+  persistence: function build (cb) {
+    clean(function (err) {
+      cb(err, myperst())
+    })
+  }
+})
+```
+
+## Collaborators
+
+* [__Gnought__](https://github.com/gnought)
+
+## License
+
+MIT
diff --git a/mqtt-backend/node_modules/aedes-persistence/abstract.js b/mqtt-backend/node_modules/aedes-persistence/abstract.js
new file mode 100644
index 0000000..bd537b6
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-persistence/abstract.js
@@ -0,0 +1,1596 @@
+const { Readable } = require('stream')
+const Packet = require('aedes-packet')
+
+function abstractPersistence (opts) {
+  const test = opts.test
+  let _persistence = opts.persistence
+  const waitForReady = opts.waitForReady
+
+  // requiring it here so it will not error for modules
+  // not using the default emitter
+  const buildEmitter = opts.buildEmitter || require('mqemitter')
+
+  if (_persistence.length === 0) {
+    _persistence = function asyncify (cb) {
+      cb(null, opts.persistence())
+    }
+  }
+
+  function persistence (cb) {
+    const mq = buildEmitter()
+    const broker = {
+      id: 'broker-42',
+      mq,
+      publish: mq.emit.bind(mq),
+      subscribe: mq.on.bind(mq),
+      unsubscribe: mq.removeListener.bind(mq),
+      counter: 0
+    }
+
+    _persistence((err, instance) => {
+      if (instance) {
+        // Wait for ready event, if applicable, to ensure the persistence isn't
+        // destroyed while it's still being set up.
+        // https://github.com/mcollina/aedes-persistence-redis/issues/41
+        if (waitForReady) {
+          // We have to listen to 'ready' before setting broker because that
+          // can result in 'ready' being emitted.
+          instance.on('ready', () => {
+            instance.removeListener('error', cb)
+            cb(null, instance)
+          })
+          instance.on('error', cb)
+        }
+        instance.broker = broker
+        if (waitForReady) {
+          // 'ready' event will call back.
+          return
+        }
+      }
+      cb(err, instance)
+    })
+  }
+
+  // legacy third party streams are typically not iterable
+  function iterableStream (stream) {
+    if (typeof stream[Symbol.asyncIterator] !== 'function') {
+      return new Readable({ objectMode: true }).wrap(stream)
+    }
+    return stream
+  }
+  // end of legacy third party streams support
+
+  async function getArrayFromStream (stream) {
+    const list = []
+    for await (const item of iterableStream(stream)) {
+      list.push(item)
+    }
+    return list
+  }
+
+  async function streamForEach (stream, fn) {
+    for await (const item of iterableStream(stream)) {
+      await fn(item)
+    }
+  }
+
+  function storeRetained (instance, opts, cb) {
+    opts = opts || {}
+
+    const packet = {
+      cmd: 'publish',
+      id: instance.broker.id,
+      topic: opts.topic || 'hello/world',
+      payload: opts.payload || Buffer.from('muahah'),
+      qos: 0,
+      retain: true
+    }
+
+    instance.storeRetained(packet, err => {
+      cb(err, packet)
+    })
+  }
+
+  function matchRetainedWithPattern (t, pattern, opts) {
+    persistence((err, instance) => {
+      if (err) { throw err }
+
+      storeRetained(instance, opts, (err, packet) => {
+        t.notOk(err, 'no error')
+        let stream
+        if (Array.isArray(pattern)) {
+          stream = instance.createRetainedStreamCombi(pattern)
+        } else {
+          stream = instance.createRetainedStream(pattern)
+        }
+
+        getArrayFromStream(stream).then(list => {
+          t.deepEqual(list, [packet], 'must return the packet')
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  }
+
+  function testInstance (title, cb) {
+    test(title, t => {
+      persistence((err, instance) => {
+        if (err) { throw err }
+        cb(t, instance)
+      })
+    })
+  }
+
+  function testPacket (t, packet, expected) {
+    if (packet.messageId === null) packet.messageId = undefined
+    t.equal(packet.messageId, undefined, 'should have an unassigned messageId in queue')
+    t.deepLooseEqual(packet, expected, 'must return the packet')
+  }
+
+  function deClassed (obj) {
+    return Object.assign({}, obj)
+  }
+
+  test('store and look up retained messages', t => {
+    matchRetainedWithPattern(t, 'hello/world')
+  })
+
+  test('look up retained messages with a # pattern', t => {
+    matchRetainedWithPattern(t, '#')
+  })
+
+  test('look up retained messages with a hello/world/# pattern', t => {
+    matchRetainedWithPattern(t, 'hello/world/#')
+  })
+
+  test('look up retained messages with a + pattern', t => {
+    matchRetainedWithPattern(t, 'hello/+')
+  })
+
+  test('look up retained messages with multiple patterns', t => {
+    matchRetainedWithPattern(t, ['hello/+', 'other/hello'])
+  })
+
+  testInstance('store multiple retained messages in order', (t, instance) => {
+    const totalMessages = 1000
+    let done = 0
+
+    const retained = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      retain: true
+    }
+
+    function checkIndex (index) {
+      const packet = new Packet(retained, instance.broker)
+
+      instance.storeRetained(packet, err => {
+        t.notOk(err, 'no error')
+        t.equal(packet.brokerCounter, index + 1, 'packet stored in order')
+        if (++done === totalMessages) {
+          instance.destroy(t.end.bind(t))
+        }
+      })
+    }
+
+    for (let i = 0; i < totalMessages; i++) {
+      checkIndex(i)
+    }
+  })
+
+  testInstance('remove retained message', (t, instance) => {
+    storeRetained(instance, {}, (err, packet) => {
+      t.notOk(err, 'no error')
+      storeRetained(instance, {
+        payload: Buffer.alloc(0)
+      }, err => {
+        t.notOk(err, 'no error')
+
+        const stream = instance.createRetainedStream('#')
+        getArrayFromStream(stream).then(list => {
+          t.deepEqual(list, [], 'must return an empty list')
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  })
+
+  testInstance('storing twice a retained message should keep only the last', (t, instance) => {
+    storeRetained(instance, {}, (err, packet) => {
+      t.notOk(err, 'no error')
+      storeRetained(instance, {
+        payload: Buffer.from('ahah')
+      }, (err, packet) => {
+        t.notOk(err, 'no error')
+
+        const stream = instance.createRetainedStream('#')
+
+        getArrayFromStream(stream).then(list => {
+          t.deepEqual(list, [packet], 'must return the last packet')
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  })
+
+  testInstance('Create a new packet while storing a retained message', (t, instance) => {
+    const packet = {
+      cmd: 'publish',
+      id: instance.broker.id,
+      topic: opts.topic || 'hello/world',
+      payload: opts.payload || Buffer.from('muahah'),
+      qos: 0,
+      retain: true
+    }
+    const newPacket = Object.assign({}, packet)
+
+    instance.storeRetained(packet, err => {
+      t.notOk(err, 'no error')
+      // packet reference change to check if a new packet is stored always
+      packet.retain = false
+      const stream = instance.createRetainedStream('#')
+
+      getArrayFromStream(stream).then(list => {
+        t.deepEqual(list, [newPacket], 'must return the last packet')
+        instance.destroy(t.end.bind(t))
+      })
+    })
+  })
+
+  testInstance('store and look up subscriptions by client', (t, instance) => {
+    const client = { id: 'abcde' }
+    const subs = [{
+      topic: 'hello',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }, {
+      topic: 'matteo',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }, {
+      topic: 'noqos',
+      qos: 0,
+      rh: 0,
+      rap: true,
+      nl: false
+    }]
+
+    instance.addSubscriptions(client, subs, (err, reClient) => {
+      t.equal(reClient, client, 'client must be the same')
+      t.notOk(err, 'no error')
+      instance.subscriptionsByClient(client, (err, resubs, reReClient) => {
+        t.equal(reReClient, client, 'client must be the same')
+        t.notOk(err, 'no error')
+        t.deepEqual(resubs, subs)
+        instance.destroy(t.end.bind(t))
+      })
+    })
+  })
+
+  testInstance('remove subscriptions by client', (t, instance) => {
+    const client = { id: 'abcde' }
+    const subs = [{
+      topic: 'hello',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }, {
+      topic: 'matteo',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }]
+
+    instance.addSubscriptions(client, subs, (err, reClient) => {
+      t.notOk(err, 'no error')
+      instance.removeSubscriptions(client, ['hello'], (err, reClient) => {
+        t.notOk(err, 'no error')
+        t.equal(reClient, client, 'client must be the same')
+        instance.subscriptionsByClient(client, (err, resubs, reClient) => {
+          t.equal(reClient, client, 'client must be the same')
+          t.notOk(err, 'no error')
+          t.deepEqual(resubs, [{
+            topic: 'matteo',
+            qos: 1,
+            rh: 0,
+            rap: true,
+            nl: false
+          }])
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  })
+
+  testInstance('store and look up subscriptions by topic', (t, instance) => {
+    const client = { id: 'abcde' }
+    const subs = [{
+      topic: 'hello',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }, {
+      topic: 'hello/#',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }, {
+      topic: 'matteo',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }]
+
+    instance.addSubscriptions(client, subs, err => {
+      t.notOk(err, 'no error')
+      instance.subscriptionsByTopic('hello', (err, resubs) => {
+        t.notOk(err, 'no error')
+        t.deepEqual(resubs, [{
+          clientId: client.id,
+          topic: 'hello/#',
+          qos: 1,
+          rh: 0,
+          rap: true,
+          nl: false
+        }, {
+          clientId: client.id,
+          topic: 'hello',
+          qos: 1,
+          rh: 0,
+          rap: true,
+          nl: false
+        }])
+        instance.destroy(t.end.bind(t))
+      })
+    })
+  })
+
+  testInstance('get client list after subscriptions', (t, instance) => {
+    const client1 = { id: 'abcde' }
+    const client2 = { id: 'efghi' }
+    const subs = [{
+      topic: 'helloagain',
+      qos: 1
+    }]
+
+    instance.addSubscriptions(client1, subs, err => {
+      t.notOk(err, 'no error for client 1')
+      instance.addSubscriptions(client2, subs, err => {
+        t.notOk(err, 'no error for client 2')
+        const stream = instance.getClientList(subs[0].topic)
+        getArrayFromStream(stream).then(out => {
+          t.deepEqual(out, [client1.id, client2.id])
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  })
+
+  testInstance('get client list after an unsubscribe', (t, instance) => {
+    const client1 = { id: 'abcde' }
+    const client2 = { id: 'efghi' }
+    const subs = [{
+      topic: 'helloagain',
+      qos: 1
+    }]
+
+    instance.addSubscriptions(client1, subs, err => {
+      t.notOk(err, 'no error for client 1')
+      instance.addSubscriptions(client2, subs, err => {
+        t.notOk(err, 'no error for client 2')
+        instance.removeSubscriptions(client2, [subs[0].topic], (err, reClient) => {
+          t.notOk(err, 'no error for removeSubscriptions')
+          const stream = instance.getClientList(subs[0].topic)
+          getArrayFromStream(stream).then(out => {
+            t.deepEqual(out, [client1.id])
+            instance.destroy(t.end.bind(t))
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('get subscriptions list after an unsubscribe', (t, instance) => {
+    const client1 = { id: 'abcde' }
+    const client2 = { id: 'efghi' }
+    const subs = [{
+      topic: 'helloagain',
+      qos: 1
+    }]
+
+    instance.addSubscriptions(client1, subs, err => {
+      t.notOk(err, 'no error for client 1')
+      instance.addSubscriptions(client2, subs, err => {
+        t.notOk(err, 'no error for client 2')
+        instance.removeSubscriptions(client2, [subs[0].topic], (err, reClient) => {
+          t.notOk(err, 'no error for removeSubscriptions')
+          instance.subscriptionsByTopic(subs[0].topic, (err, clients) => {
+            t.notOk(err, 'no error getting subscriptions by topic')
+            t.deepEqual(clients[0].clientId, client1.id)
+            instance.destroy(t.end.bind(t))
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('QoS 0 subscriptions, restored but not matched', (t, instance) => {
+    const client = { id: 'abcde' }
+    const subs = [{
+      topic: 'hello',
+      qos: 0,
+      rh: 0,
+      rap: true,
+      nl: false
+    }, {
+      topic: 'hello/#',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }, {
+      topic: 'matteo',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }]
+
+    instance.addSubscriptions(client, subs, err => {
+      t.notOk(err, 'no error')
+      instance.subscriptionsByClient(client, (err, resubs) => {
+        t.notOk(err, 'no error')
+        t.deepEqual(resubs, subs)
+        instance.subscriptionsByTopic('hello', (err, resubs2) => {
+          t.notOk(err, 'no error')
+          t.deepEqual(resubs2, [{
+            clientId: client.id,
+            topic: 'hello/#',
+            qos: 1,
+            rh: 0,
+            rap: true,
+            nl: false
+          }])
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  })
+
+  testInstance('clean subscriptions', (t, instance) => {
+    const client = { id: 'abcde' }
+    const subs = [{
+      topic: 'hello',
+      qos: 1
+    }, {
+      topic: 'matteo',
+      qos: 1
+    }]
+
+    instance.addSubscriptions(client, subs, err => {
+      t.notOk(err, 'no error')
+      instance.cleanSubscriptions(client, err => {
+        t.notOk(err, 'no error')
+        instance.subscriptionsByTopic('hello', (err, resubs) => {
+          t.notOk(err, 'no error')
+          t.deepEqual(resubs, [], 'no subscriptions')
+
+          instance.subscriptionsByClient(client, (err, resubs) => {
+            t.error(err)
+            t.deepEqual(resubs, null, 'no subscriptions')
+
+            instance.countOffline((err, subsCount, clientsCount) => {
+              t.error(err, 'no error')
+              t.equal(subsCount, 0, 'no subscriptions added')
+              t.equal(clientsCount, 0, 'no clients added')
+
+              instance.destroy(t.end.bind(t))
+            })
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('clean subscriptions with no active subscriptions', (t, instance) => {
+    const client = { id: 'abcde' }
+
+    instance.cleanSubscriptions(client, err => {
+      t.notOk(err, 'no error')
+      instance.subscriptionsByTopic('hello', (err, resubs) => {
+        t.notOk(err, 'no error')
+        t.deepEqual(resubs, [], 'no subscriptions')
+
+        instance.subscriptionsByClient(client, (err, resubs) => {
+          t.error(err)
+          t.deepEqual(resubs, null, 'no subscriptions')
+
+          instance.countOffline((err, subsCount, clientsCount) => {
+            t.error(err, 'no error')
+            t.equal(subsCount, 0, 'no subscriptions added')
+            t.equal(clientsCount, 0, 'no clients added')
+
+            instance.destroy(t.end.bind(t))
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('same topic, different QoS', (t, instance) => {
+    const client = { id: 'abcde' }
+    const subs = [{
+      topic: 'hello',
+      qos: 0,
+      rh: 0,
+      rap: true,
+      nl: false
+    }, {
+      topic: 'hello',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }]
+
+    instance.addSubscriptions(client, subs, (err, reClient) => {
+      t.equal(reClient, client, 'client must be the same')
+      t.error(err, 'no error')
+
+      instance.subscriptionsByClient(client, (err, subsForClient, client) => {
+        t.error(err, 'no error')
+        t.deepEqual(subsForClient, [{
+          topic: 'hello',
+          qos: 1,
+          rh: 0,
+          rap: true,
+          nl: false
+        }])
+
+        instance.subscriptionsByTopic('hello', (err, subsForTopic) => {
+          t.error(err, 'no error')
+          t.deepEqual(subsForTopic, [{
+            clientId: 'abcde',
+            topic: 'hello',
+            qos: 1,
+            rh: 0,
+            rap: true,
+            nl: false
+          }])
+
+          instance.countOffline((err, subsCount, clientsCount) => {
+            t.error(err, 'no error')
+            t.equal(subsCount, 1, 'one subscription added')
+            t.equal(clientsCount, 1, 'one client added')
+
+            instance.destroy(t.end.bind(t))
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('replace subscriptions', (t, instance) => {
+    const client = { id: 'abcde' }
+    const topic = 'hello'
+    const sub = { topic, rh: 0, rap: true, nl: false }
+    const subByTopic = { clientId: client.id, topic, rh: 0, rap: true, nl: false }
+
+    function check (qos, cb) {
+      sub.qos = subByTopic.qos = qos
+      instance.addSubscriptions(client, [sub], (err, reClient) => {
+        t.equal(reClient, client, 'client must be the same')
+        t.error(err, 'no error')
+        instance.subscriptionsByClient(client, (err, subsForClient, client) => {
+          t.error(err, 'no error')
+          t.deepEqual(subsForClient, [sub])
+          instance.subscriptionsByTopic(topic, (err, subsForTopic) => {
+            t.error(err, 'no error')
+            t.deepEqual(subsForTopic, qos === 0 ? [] : [subByTopic])
+            instance.countOffline((err, subsCount, clientsCount) => {
+              t.error(err, 'no error')
+              if (qos === 0) {
+                t.equal(subsCount, 0, 'no subscriptions added')
+              } else {
+                t.equal(subsCount, 1, 'one subscription added')
+              }
+              t.equal(clientsCount, 1, 'one client added')
+              cb()
+            })
+          })
+        })
+      })
+    }
+
+    check(0, () => {
+      check(1, () => {
+        check(2, () => {
+          check(1, () => {
+            check(0, () => {
+              instance.destroy(t.end.bind(t))
+            })
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('replace subscriptions in same call', (t, instance) => {
+    const client = { id: 'abcde' }
+    const topic = 'hello'
+    const subs = [
+      { topic, qos: 0, rh: 0, rap: true, nl: false },
+      { topic, qos: 1, rh: 0, rap: true, nl: false },
+      { topic, qos: 2, rh: 0, rap: true, nl: false },
+      { topic, qos: 1, rh: 0, rap: true, nl: false },
+      { topic, qos: 0, rh: 0, rap: true, nl: false }
+    ]
+    instance.addSubscriptions(client, subs, (err, reClient) => {
+      t.equal(reClient, client, 'client must be the same')
+      t.error(err, 'no error')
+      instance.subscriptionsByClient(client, (err, subsForClient, client) => {
+        t.error(err, 'no error')
+        t.deepEqual(subsForClient, [{ topic, qos: 0, rh: 0, rap: true, nl: false }])
+        instance.subscriptionsByTopic(topic, (err, subsForTopic) => {
+          t.error(err, 'no error')
+          t.deepEqual(subsForTopic, [])
+          instance.countOffline((err, subsCount, clientsCount) => {
+            t.error(err, 'no error')
+            t.equal(subsCount, 0, 'no subscriptions added')
+            t.equal(clientsCount, 1, 'one client added')
+            instance.destroy(t.end.bind(t))
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('store and count subscriptions', (t, instance) => {
+    const client = { id: 'abcde' }
+    const subs = [{
+      topic: 'hello',
+      qos: 1
+    }, {
+      topic: 'matteo',
+      qos: 1
+    }, {
+      topic: 'noqos',
+      qos: 0
+    }]
+
+    instance.addSubscriptions(client, subs, (err, reClient) => {
+      t.equal(reClient, client, 'client must be the same')
+      t.error(err, 'no error')
+
+      instance.countOffline((err, subsCount, clientsCount) => {
+        t.error(err, 'no error')
+        t.equal(subsCount, 2, 'two subscriptions added')
+        t.equal(clientsCount, 1, 'one client added')
+
+        instance.removeSubscriptions(client, ['hello'], (err, reClient) => {
+          t.error(err, 'no error')
+
+          instance.countOffline((err, subsCount, clientsCount) => {
+            t.error(err, 'no error')
+            t.equal(subsCount, 1, 'one subscription added')
+            t.equal(clientsCount, 1, 'one client added')
+
+            instance.removeSubscriptions(client, ['matteo'], (err, reClient) => {
+              t.error(err, 'no error')
+
+              instance.countOffline((err, subsCount, clientsCount) => {
+                t.error(err, 'no error')
+                t.equal(subsCount, 0, 'zero subscriptions added')
+                t.equal(clientsCount, 1, 'one client added')
+
+                instance.removeSubscriptions(client, ['noqos'], (err, reClient) => {
+                  t.error(err, 'no error')
+
+                  instance.countOffline((err, subsCount, clientsCount) => {
+                    t.error(err, 'no error')
+                    t.equal(subsCount, 0, 'zero subscriptions added')
+                    t.equal(clientsCount, 0, 'zero clients added')
+
+                    instance.removeSubscriptions(client, ['noqos'], (err, reClient) => {
+                      t.error(err, 'no error')
+
+                      instance.countOffline((err, subsCount, clientsCount) => {
+                        t.error(err, 'no error')
+                        t.equal(subsCount, 0, 'zero subscriptions added')
+                        t.equal(clientsCount, 0, 'zero clients added')
+
+                        instance.destroy(t.end.bind(t))
+                      })
+                    })
+                  })
+                })
+              })
+            })
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('count subscriptions with two clients', (t, instance) => {
+    const client1 = { id: 'abcde' }
+    const client2 = { id: 'fghij' }
+    const subs = [{
+      topic: 'hello',
+      qos: 1
+    }, {
+      topic: 'matteo',
+      qos: 1
+    }, {
+      topic: 'noqos',
+      qos: 0
+    }]
+
+    function remove (client, subs, expectedSubs, expectedClients, cb) {
+      instance.removeSubscriptions(client, subs, (err, reClient) => {
+        t.error(err, 'no error')
+        t.equal(reClient, client, 'client must be the same')
+
+        instance.countOffline((err, subsCount, clientsCount) => {
+          t.error(err, 'no error')
+          t.equal(subsCount, expectedSubs, 'subscriptions added')
+          t.equal(clientsCount, expectedClients, 'clients added')
+
+          cb()
+        })
+      })
+    }
+
+    instance.addSubscriptions(client1, subs, (err, reClient) => {
+      t.equal(reClient, client1, 'client must be the same')
+      t.error(err, 'no error')
+
+      instance.addSubscriptions(client2, subs, (err, reClient) => {
+        t.equal(reClient, client2, 'client must be the same')
+        t.error(err, 'no error')
+
+        remove(client1, ['foobar'], 4, 2, () => {
+          remove(client1, ['hello'], 3, 2, () => {
+            remove(client1, ['hello'], 3, 2, () => {
+              remove(client1, ['matteo'], 2, 2, () => {
+                remove(client1, ['noqos'], 2, 1, () => {
+                  remove(client2, ['hello'], 1, 1, () => {
+                    remove(client2, ['matteo'], 0, 1, () => {
+                      remove(client2, ['noqos'], 0, 0, () => {
+                        instance.destroy(t.end.bind(t))
+                      })
+                    })
+                  })
+                })
+              })
+            })
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('add duplicate subs to persistence for qos > 0', (t, instance) => {
+    const client = { id: 'abcde' }
+    const topic = 'hello'
+    const subs = [{
+      topic,
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }]
+
+    instance.addSubscriptions(client, subs, (err, reClient) => {
+      t.equal(reClient, client, 'client must be the same')
+      t.error(err, 'no error')
+
+      instance.addSubscriptions(client, subs, (err, resCLient) => {
+        t.equal(resCLient, client, 'client must be the same')
+        t.error(err, 'no error')
+        subs[0].clientId = client.id
+        instance.subscriptionsByTopic(topic, (err, subsForTopic) => {
+          t.error(err, 'no error')
+          t.deepEqual(subsForTopic, subs)
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  })
+
+  testInstance('add duplicate subs to persistence for qos 0', (t, instance) => {
+    const client = { id: 'abcde' }
+    const topic = 'hello'
+    const subs = [{
+      topic,
+      qos: 0,
+      rh: 0,
+      rap: true,
+      nl: false
+    }]
+
+    instance.addSubscriptions(client, subs, (err, reClient) => {
+      t.equal(reClient, client, 'client must be the same')
+      t.error(err, 'no error')
+
+      instance.addSubscriptions(client, subs, (err, resCLient) => {
+        t.equal(resCLient, client, 'client must be the same')
+        t.error(err, 'no error')
+        instance.subscriptionsByClient(client, (err, subsForClient, client) => {
+          t.error(err, 'no error')
+          t.deepEqual(subsForClient, subs)
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  })
+
+  testInstance('get topic list after concurrent subscriptions of a client', (t, instance) => {
+    const client = { id: 'abcde' }
+    const subs1 = [{
+      topic: 'hello1',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }]
+    const subs2 = [{
+      topic: 'hello2',
+      qos: 1,
+      rh: 0,
+      rap: true,
+      nl: false
+    }]
+    let calls = 2
+
+    function done () {
+      if (!--calls) {
+        instance.subscriptionsByClient(client, (err, resubs) => {
+          t.notOk(err, 'no error')
+          resubs.sort((a, b) => b.topic.localeCompare(b.topic, 'en'))
+          t.deepEqual(resubs, [subs1[0], subs2[0]])
+          instance.destroy(t.end.bind(t))
+        })
+      }
+    }
+
+    instance.addSubscriptions(client, subs1, err => {
+      t.notOk(err, 'no error for hello1')
+      done()
+    })
+    instance.addSubscriptions(client, subs2, err => {
+      t.notOk(err, 'no error for hello2')
+      done()
+    })
+  })
+
+  testInstance('add outgoing packet and stream it', (t, instance) => {
+    const sub = {
+      clientId: 'abcde',
+      topic: 'hello',
+      qos: 1
+    }
+    const client = {
+      id: sub.clientId
+    }
+    const packet = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      dup: false,
+      length: 14,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42
+    }
+    const expected = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      retain: false,
+      dup: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42,
+      messageId: undefined
+    }
+
+    instance.outgoingEnqueue(sub, packet, err => {
+      t.error(err)
+      const stream = instance.outgoingStream(client)
+
+      getArrayFromStream(stream).then(list => {
+        const packet = list[0]
+        testPacket(t, packet, expected)
+        instance.destroy(t.end.bind(t))
+      })
+    })
+  })
+
+  testInstance('add outgoing packet for multiple subs and stream to all', (t, instance) => {
+    const sub = {
+      clientId: 'abcde',
+      topic: 'hello',
+      qos: 1
+    }
+    const sub2 = {
+      clientId: 'fghih',
+      topic: 'hello',
+      qos: 1
+    }
+    const subs = [sub, sub2]
+    const client = {
+      id: sub.clientId
+    }
+    const client2 = {
+      id: sub2.clientId
+    }
+    const packet = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      dup: false,
+      length: 14,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42
+    }
+    const expected = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      retain: false,
+      dup: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42,
+      messageId: undefined
+    }
+
+    instance.outgoingEnqueueCombi(subs, packet, err => {
+      t.error(err)
+      const stream = instance.outgoingStream(client)
+      getArrayFromStream(stream).then(list => {
+        const packet = list[0]
+        testPacket(t, packet, expected)
+
+        const stream2 = instance.outgoingStream(client2)
+        getArrayFromStream(stream2).then(list2 => {
+          const packet = list2[0]
+          testPacket(t, packet, expected)
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  })
+
+  testInstance('add outgoing packet as a string and pump', (t, instance) => {
+    const sub = {
+      clientId: 'abcde',
+      topic: 'hello',
+      qos: 1
+    }
+    const client = {
+      id: sub.clientId
+    }
+    const packet1 = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 10
+    }
+    const packet2 = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('matteo'),
+      qos: 1,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 50
+    }
+    const queue = []
+    enqueueAndUpdate(t, instance, client, sub, packet1, 42, updated1 => {
+      enqueueAndUpdate(t, instance, client, sub, packet2, 43, updated2 => {
+        const stream = instance.outgoingStream(client)
+
+        async function clearQueue (data) {
+          return new Promise((resolve, reject) => {
+            instance.outgoingUpdate(client, data,
+              (err, client, packet) => {
+                t.notOk(err, 'no error')
+                queue.push(packet)
+                resolve()
+              })
+          })
+        }
+        streamForEach(stream, clearQueue).then(function done () {
+          t.equal(queue.length, 2)
+          if (queue.length === 2) {
+            t.deepEqual(deClassed(queue[0]), deClassed(updated1))
+            t.deepEqual(deClassed(queue[1]), deClassed(updated2))
+          }
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  })
+
+  testInstance('add outgoing packet as a string and stream', (t, instance) => {
+    const sub = {
+      clientId: 'abcde',
+      topic: 'hello',
+      qos: 1
+    }
+    const client = {
+      id: sub.clientId
+    }
+    const packet = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      dup: false,
+      length: 14,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42
+    }
+    const expected = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      retain: false,
+      dup: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42,
+      messageId: undefined
+    }
+
+    instance.outgoingEnqueueCombi([sub], packet, err => {
+      t.error(err)
+      const stream = instance.outgoingStream(client)
+
+      getArrayFromStream(stream).then(list => {
+        const packet = list[0]
+        testPacket(t, packet, expected)
+        instance.destroy(t.end.bind(t))
+      })
+    })
+  })
+
+  testInstance('add outgoing packet and stream it twice', (t, instance) => {
+    const sub = {
+      clientId: 'abcde',
+      topic: 'hello',
+      qos: 1
+    }
+    const client = {
+      id: sub.clientId
+    }
+    const packet = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      dup: false,
+      length: 14,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42,
+      messageId: 4242
+    }
+    const expected = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      retain: false,
+      dup: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42,
+      messageId: undefined
+    }
+
+    instance.outgoingEnqueueCombi([sub], packet, err => {
+      t.error(err)
+      const stream = instance.outgoingStream(client)
+
+      getArrayFromStream(stream).then(list => {
+        const packet = list[0]
+        testPacket(t, packet, expected)
+
+        const stream2 = instance.outgoingStream(client)
+
+        getArrayFromStream(stream2).then(list2 => {
+          const packet = list2[0]
+          testPacket(t, packet, expected)
+          t.notEqual(packet, expected, 'packet must be a different object')
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  })
+
+  function enqueueAndUpdate (t, instance, client, sub, packet, messageId, callback) {
+    instance.outgoingEnqueueCombi([sub], packet, err => {
+      t.error(err)
+      const updated = new Packet(packet)
+      updated.messageId = messageId
+
+      instance.outgoingUpdate(client, updated, (err, reclient, repacket) => {
+        t.error(err)
+        t.equal(reclient, client, 'client matches')
+        t.equal(repacket, updated, 'packet matches')
+        callback(updated)
+      })
+    })
+  }
+
+  testInstance('add outgoing packet and update messageId', (t, instance) => {
+    const sub = {
+      clientId: 'abcde', topic: 'hello', qos: 1
+    }
+    const client = {
+      id: sub.clientId
+    }
+    const packet = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      dup: false,
+      length: 14,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42
+    }
+
+    enqueueAndUpdate(t, instance, client, sub, packet, 42, updated => {
+      const stream = instance.outgoingStream(client)
+      delete updated.messageId
+      getArrayFromStream(stream).then(list => {
+        delete list[0].messageId
+        t.notEqual(list[0], updated, 'must not be the same object')
+        t.deepEqual(deClassed(list[0]), deClassed(updated), 'must return the packet')
+        t.equal(list.length, 1, 'must return only one packet')
+        instance.destroy(t.end.bind(t))
+      })
+    })
+  })
+
+  testInstance('add 2 outgoing packet and clear messageId', (t, instance) => {
+    const sub = {
+      clientId: 'abcde', topic: 'hello', qos: 1
+    }
+    const client = {
+      id: sub.clientId
+    }
+    const packet1 = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      dup: false,
+      length: 14,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42
+    }
+    const packet2 = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('matteo'),
+      qos: 1,
+      dup: false,
+      length: 14,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 43
+    }
+
+    enqueueAndUpdate(t, instance, client, sub, packet1, 42, updated1 => {
+      enqueueAndUpdate(t, instance, client, sub, packet2, 43, updated2 => {
+        instance.outgoingClearMessageId(client, updated1, (err, packet) => {
+          t.error(err)
+          t.deepEqual(packet.messageId, 42, 'must have the same messageId')
+          t.deepEqual(packet.payload.toString(), packet1.payload.toString(), 'must have original payload')
+          t.deepEqual(packet.topic, packet1.topic, 'must have original topic')
+          const stream = instance.outgoingStream(client)
+          delete updated2.messageId
+          getArrayFromStream(stream).then(list => {
+            delete list[0].messageId
+            t.notEqual(list[0], updated2, 'must not be the same object')
+            t.deepEqual(deClassed(list[0]), deClassed(updated2), 'must return the packet')
+            t.equal(list.length, 1, 'must return only one packet')
+            instance.destroy(t.end.bind(t))
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('add many outgoing packets and clear messageIds', async (t, instance) => {
+    const sub = {
+      clientId: 'abcde', topic: 'hello', qos: 1
+    }
+    const client = {
+      id: sub.clientId
+    }
+    const packet = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      dup: false,
+      length: 14,
+      retain: false
+    }
+
+    function outStream (instance, client) {
+      return iterableStream(instance.outgoingStream(client))
+    }
+
+    // we just need a stream to figure out the high watermark
+    const stream = outStream(instance, client)
+    const total = stream.readableHighWaterMark * 2
+
+    function submitMessage (id) {
+      return new Promise((resolve, reject) => {
+        const p = new Packet(packet, instance.broker)
+        p.messageId = id
+        instance.outgoingEnqueue(sub, p, (err) => {
+          if (err) {
+            return reject(err)
+          }
+          instance.outgoingUpdate(client, p, resolve)
+        })
+      })
+    }
+
+    function clearMessage (p) {
+      return new Promise((resolve, reject) => {
+        instance.outgoingClearMessageId(client, p, (err, received) => {
+          t.error(err)
+          t.deepEqual(received, p, 'must return the packet')
+          resolve()
+        })
+      })
+    }
+
+    for (let i = 0; i < total; i++) {
+      await submitMessage(i)
+    }
+
+    let queued = 0
+    for await (const p of outStream(instance, client)) {
+      if (p) {
+        queued++
+      }
+    }
+    t.equal(queued, total, `outgoing queue must hold ${total} items`)
+
+    for await (const p of outStream(instance, client)) {
+      await clearMessage(p)
+    }
+
+    let queued2 = 0
+    for await (const p of outStream(instance, client)) {
+      if (p) {
+        queued2++
+      }
+    }
+    t.equal(queued2, 0, 'outgoing queue is empty')
+    instance.destroy(t.end.bind(t))
+  })
+
+  testInstance('update to publish w/ same messageId', (t, instance) => {
+    const sub = {
+      clientId: 'abcde', topic: 'hello', qos: 1
+    }
+    const client = {
+      id: sub.clientId
+    }
+    const packet1 = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2,
+      dup: false,
+      length: 14,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42,
+      messageId: 42
+    }
+    const packet2 = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2,
+      dup: false,
+      length: 14,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 50,
+      messageId: 42
+    }
+
+    instance.outgoingEnqueue(sub, packet1, () => {
+      instance.outgoingEnqueue(sub, packet2, () => {
+        instance.outgoingUpdate(client, packet1, () => {
+          instance.outgoingUpdate(client, packet2, () => {
+            const stream = instance.outgoingStream(client)
+            getArrayFromStream(stream).then(list => {
+              t.equal(list.length, 2, 'must have two items in queue')
+              t.equal(list[0].brokerCounter, packet1.brokerCounter, 'brokerCounter must match')
+              t.equal(list[0].messageId, packet1.messageId, 'messageId must match')
+              t.equal(list[1].brokerCounter, packet2.brokerCounter, 'brokerCounter must match')
+              t.equal(list[1].messageId, packet2.messageId, 'messageId must match')
+              instance.destroy(t.end.bind(t))
+            })
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('update to pubrel', (t, instance) => {
+    const sub = {
+      clientId: 'abcde', topic: 'hello', qos: 1
+    }
+    const client = {
+      id: sub.clientId
+    }
+    const packet = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2,
+      dup: false,
+      length: 14,
+      retain: false,
+      brokerId: instance.broker.id,
+      brokerCounter: 42
+    }
+
+    instance.outgoingEnqueueCombi([sub], packet, err => {
+      t.error(err)
+      const updated = new Packet(packet)
+      updated.messageId = 42
+
+      instance.outgoingUpdate(client, updated, (err, reclient, repacket) => {
+        t.error(err)
+        t.equal(reclient, client, 'client matches')
+        t.equal(repacket, updated, 'packet matches')
+
+        const pubrel = {
+          cmd: 'pubrel',
+          messageId: updated.messageId
+        }
+
+        instance.outgoingUpdate(client, pubrel, err => {
+          t.error(err)
+
+          const stream = instance.outgoingStream(client)
+
+          getArrayFromStream(stream).then(list => {
+            t.deepEqual(list, [pubrel], 'must return the packet')
+            instance.destroy(t.end.bind(t))
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('add incoming packet, get it, and clear with messageId', (t, instance) => {
+    const client = {
+      id: 'abcde'
+    }
+    const packet = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2,
+      dup: false,
+      length: 14,
+      retain: false,
+      messageId: 42
+    }
+
+    instance.incomingStorePacket(client, packet, err => {
+      t.error(err)
+
+      instance.incomingGetPacket(client, {
+        messageId: packet.messageId
+      }, (err, retrieved) => {
+        t.error(err)
+
+        // adjusting the objects so they match
+        delete retrieved.brokerCounter
+        delete retrieved.brokerId
+        delete packet.length
+
+        t.deepLooseEqual(retrieved, packet, 'retrieved packet must be deeply equal')
+        t.notEqual(retrieved, packet, 'retrieved packet must not be the same objet')
+
+        instance.incomingDelPacket(client, retrieved, err => {
+          t.error(err)
+
+          instance.incomingGetPacket(client, {
+            messageId: packet.messageId
+          }, (err, retrieved) => {
+            t.ok(err, 'must error')
+            instance.destroy(t.end.bind(t))
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('store, fetch and delete will message', (t, instance) => {
+    const client = {
+      id: '12345'
+    }
+    const expected = {
+      topic: 'hello/died',
+      payload: Buffer.from('muahahha'),
+      qos: 0,
+      retain: true
+    }
+
+    instance.putWill(client, expected, (err, c) => {
+      t.error(err, 'no error')
+      t.equal(c, client, 'client matches')
+      instance.getWill(client, (err, packet, c) => {
+        t.error(err, 'no error')
+        t.deepEqual(packet, expected, 'will matches')
+        t.equal(c, client, 'client matches')
+        client.brokerId = packet.brokerId
+        instance.delWill(client, (err, packet, c) => {
+          t.error(err, 'no error')
+          t.deepEqual(packet, expected, 'will matches')
+          t.equal(c, client, 'client matches')
+          instance.getWill(client, (err, packet, c) => {
+            t.error(err, 'no error')
+            t.notOk(packet, 'no will after del')
+            t.equal(c, client, 'client matches')
+            instance.destroy(t.end.bind(t))
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('stream all will messages', (t, instance) => {
+    const client = {
+      id: '12345'
+    }
+    const toWrite = {
+      topic: 'hello/died',
+      payload: Buffer.from('muahahha'),
+      qos: 0,
+      retain: true
+    }
+
+    instance.putWill(client, toWrite, (err, c) => {
+      t.error(err, 'no error')
+      t.equal(c, client, 'client matches')
+      streamForEach(instance.streamWill(), (chunk) => {
+        t.deepEqual(chunk, {
+          clientId: client.id,
+          brokerId: instance.broker.id,
+          topic: 'hello/died',
+          payload: Buffer.from('muahahha'),
+          qos: 0,
+          retain: true
+        }, 'packet matches')
+        instance.delWill(client, (err, result, client) => {
+          t.error(err, 'no error')
+          instance.destroy(t.end.bind(t))
+        })
+      })
+    })
+  })
+
+  testInstance('stream all will message for unknown brokers', (t, instance) => {
+    const originalId = instance.broker.id
+    const client = {
+      id: '42'
+    }
+    const anotherClient = {
+      id: '24'
+    }
+    const toWrite1 = {
+      topic: 'hello/died42',
+      payload: Buffer.from('muahahha'),
+      qos: 0,
+      retain: true
+    }
+    const toWrite2 = {
+      topic: 'hello/died24',
+      payload: Buffer.from('muahahha'),
+      qos: 0,
+      retain: true
+    }
+
+    instance.putWill(client, toWrite1, (err, c) => {
+      t.error(err, 'no error')
+      t.equal(c, client, 'client matches')
+      instance.broker.id = 'anotherBroker'
+      instance.putWill(anotherClient, toWrite2, (err, c) => {
+        t.error(err, 'no error')
+        t.equal(c, anotherClient, 'client matches')
+        streamForEach(instance.streamWill({
+          anotherBroker: Date.now()
+        }), (chunk) => {
+          t.deepEqual(chunk, {
+            clientId: client.id,
+            brokerId: originalId,
+            topic: 'hello/died42',
+            payload: Buffer.from('muahahha'),
+            qos: 0,
+            retain: true
+          }, 'packet matches')
+          instance.delWill(client, (err, result, client) => {
+            t.error(err, 'no error')
+            instance.destroy(t.end.bind(t))
+          })
+        })
+      })
+    })
+  })
+
+  testInstance('delete wills from dead brokers', (t, instance) => {
+    const client = {
+      id: '42'
+    }
+
+    const toWrite1 = {
+      topic: 'hello/died42',
+      payload: Buffer.from('muahahha'),
+      qos: 0,
+      retain: true
+    }
+
+    instance.putWill(client, toWrite1, (err, c) => {
+      t.error(err, 'no error')
+      t.equal(c, client, 'client matches')
+      instance.broker.id = 'anotherBroker'
+      client.brokerId = instance.broker.id
+      instance.delWill(client, (err, result, client) => {
+        t.error(err, 'no error')
+        instance.destroy(t.end.bind(t))
+      })
+    })
+  })
+
+  testInstance('do not error if unkown messageId in outoingClearMessageId', (t, instance) => {
+    const client = {
+      id: 'abc-123'
+    }
+
+    instance.outgoingClearMessageId(client, 42, err => {
+      t.error(err)
+      instance.destroy(t.end.bind(t))
+    })
+  })
+}
+
+module.exports = abstractPersistence
diff --git a/mqtt-backend/node_modules/aedes-persistence/package.json b/mqtt-backend/node_modules/aedes-persistence/package.json
new file mode 100644
index 0000000..b31f292
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-persistence/package.json
@@ -0,0 +1,80 @@
+{
+  "name": "aedes-persistence",
+  "version": "9.1.2",
+  "description": "The spec for an Aedes persistence, with abstract tests and a fast in-memory implementation.",
+  "main": "persistence.js",
+  "types": "types/index.d.ts",
+  "scripts": {
+    "lint": "standard --verbose | snazzy",
+    "lint-fix": "standard --fix",
+    "unit": "tape test.js | faucet",
+    "test:typescript": "tsd",
+    "test": "npm run lint && npm run unit && tsd",
+    "coverage": "nyc --reporter=lcov tape test.js",
+    "test:ci": "npm run lint && npm run coverage && npm run test:typescript",
+    "license-checker": "license-checker --production --onlyAllow='MIT;ISC;BSD-3-Clause;BSD-2-Clause'",
+    "release": "read -p 'GITHUB_TOKEN: ' GITHUB_TOKEN && export GITHUB_TOKEN=$GITHUB_TOKEN && release-it --disable-metrics"
+  },
+  "release-it": {
+    "github": {
+      "release": true
+    },
+    "git": {
+      "tagName": "v${version}"
+    },
+    "hooks": {
+      "before:init": [
+        "npm run test"
+      ]
+    },
+    "npm": {
+      "publish": true
+    }
+  },
+  "pre-commit": [
+    "test"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/moscajs/aedes-persistence.git"
+  },
+  "keywords": [
+    "mqtt",
+    "broker",
+    "persistence",
+    "aedes"
+  ],
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "contributors": [
+    {
+      "name": "Gnought",
+      "url": "https://github.com/gnought"
+    }
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/moscajs/aedes-persistence/issues"
+  },
+  "homepage": "https://github.com/moscajs/aedes-persistence#readme",
+  "engines": {
+    "node": ">=14"
+  },
+  "devDependencies": {
+    "@types/node": "^17.0.29",
+    "aedes": "^0.46.3",
+    "faucet": "0.0.1",
+    "license-checker": "^25.0.1",
+    "mqemitter": "^4.5.0",
+    "nyc": "^15.1.0",
+    "pre-commit": "^1.2.2",
+    "release-it": "^14.14.2",
+    "snazzy": "^9.0.0",
+    "standard": "^17.0.0",
+    "tape": "^5.5.3",
+    "tsd": "^0.20.0"
+  },
+  "dependencies": {
+    "aedes-packet": "^3.0.0",
+    "qlobber": "^7.0.0"
+  }
+}
diff --git a/mqtt-backend/node_modules/aedes-persistence/persistence.js b/mqtt-backend/node_modules/aedes-persistence/persistence.js
new file mode 100644
index 0000000..f4a6538
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-persistence/persistence.js
@@ -0,0 +1,335 @@
+const { Readable } = require('stream')
+const QlobberSub = require('qlobber/aedes/qlobber-sub')
+const { QlobberTrue } = require('qlobber')
+const Packet = require('aedes-packet')
+const QlobberOpts = {
+  wildcard_one: '+',
+  wildcard_some: '#',
+  separator: '/'
+}
+const CREATE_ON_EMPTY = true
+
+function * multiIterables (iterables) {
+  for (const iter of iterables) {
+    yield * iter
+  }
+}
+
+function * retainedMessagesByPattern (retained, pattern) {
+  const qlobber = new QlobberTrue(QlobberOpts)
+  qlobber.add(pattern)
+
+  for (const [topic, packet] of retained) {
+    if (qlobber.test(topic)) {
+      yield packet
+    }
+  }
+}
+
+function * willsByBrokers (wills, brokers) {
+  for (const will of wills.values()) {
+    if (!brokers[will.brokerId]) {
+      yield will
+    }
+  }
+}
+
+function * clientListbyTopic (subscriptions, topic) {
+  for (const [clientId, topicMap] of subscriptions) {
+    if (topicMap.has(topic)) {
+      yield clientId
+    }
+  }
+}
+
+class MemoryPersistence {
+  // private class members start with #
+  #retained
+  #subscriptions
+  #outgoing
+  #incoming
+  #wills
+  #clientsCount
+  #trie
+
+  constructor () {
+    // using Maps for convenience and security (risk on prototype polution)
+    // Map ( topic -> packet )
+    this.#retained = new Map()
+    // Map ( clientId -> Map( topic -> { qos, rh, rap, nl } ))
+    this.#subscriptions = new Map()
+    // Map ( clientId  > [ packet ] }
+    this.#outgoing = new Map()
+    // Map ( clientId -> { packetId -> Packet } )
+    this.#incoming = new Map()
+    // Map( clientId -> will )
+    this.#wills = new Map()
+    this.#clientsCount = 0
+    this.#trie = new QlobberSub(QlobberOpts)
+  }
+
+  storeRetained (pkt, cb) {
+    const packet = Object.assign({}, pkt)
+    if (packet.payload.length === 0) {
+      this.#retained.delete(packet.topic)
+    } else {
+      this.#retained.set(packet.topic, packet)
+    }
+    cb(null)
+  }
+
+  createRetainedStreamCombi (patterns) {
+    const iterables = patterns.map((p) => {
+      return retainedMessagesByPattern(this.#retained, p)
+    })
+    return Readable.from(multiIterables(iterables))
+  }
+
+  createRetainedStream (pattern) {
+    return Readable.from(retainedMessagesByPattern(this.#retained, pattern))
+  }
+
+  addSubscriptions (client, subs, cb) {
+    let stored = this.#subscriptions.get(client.id)
+    const trie = this.#trie
+
+    if (!stored) {
+      stored = new Map()
+      this.#subscriptions.set(client.id, stored)
+      this.#clientsCount++
+    }
+
+    for (const sub of subs) {
+      const storedSub = stored.get(sub.topic)
+      if (sub.qos > 0) {
+        trie.add(sub.topic, {
+          clientId: client.id,
+          topic: sub.topic,
+          qos: sub.qos,
+          rh: sub.rh,
+          rap: sub.rap,
+          nl: sub.nl
+        })
+      } else if (storedSub?.qos > 0) {
+        trie.remove(sub.topic, {
+          clientId: client.id,
+          topic: sub.topic
+        })
+      }
+      stored.set(sub.topic, { qos: sub.qos, rh: sub.rh, rap: sub.rap, nl: sub.nl })
+    }
+
+    cb(null, client)
+  }
+
+  removeSubscriptions (client, subs, cb) {
+    const stored = this.#subscriptions.get(client.id)
+    const trie = this.#trie
+
+    if (stored) {
+      for (const topic of subs) {
+        const storedSub = stored.get(topic)
+        if (storedSub !== undefined) {
+          if (storedSub.qos > 0) {
+            trie.remove(topic, { clientId: client.id, topic })
+          }
+          stored.delete(topic)
+        }
+      }
+
+      if (stored.size === 0) {
+        this.#clientsCount--
+        this.#subscriptions.delete(client.id)
+      }
+    }
+
+    cb(null, client)
+  }
+
+  subscriptionsByClient (client, cb) {
+    let subs = null
+    const stored = this.#subscriptions.get(client.id)
+    if (stored) {
+      subs = []
+      for (const [topic, storedSub] of stored) {
+        subs.push({ topic, ...storedSub })
+      }
+    }
+    cb(null, subs, client)
+  }
+
+  countOffline (cb) {
+    return cb(null, this.#trie.subscriptionsCount, this.#clientsCount)
+  }
+
+  subscriptionsByTopic (pattern, cb) {
+    cb(null, this.#trie.match(pattern))
+  }
+
+  cleanSubscriptions (client, cb) {
+    const trie = this.#trie
+    const stored = this.#subscriptions.get(client.id)
+
+    if (stored) {
+      for (const [topic, storedSub] of stored) {
+        if (storedSub.qos > 0) {
+          trie.remove(topic, { clientId: client.id, topic })
+        }
+      }
+
+      this.#clientsCount--
+      this.#subscriptions.delete(client.id)
+    }
+
+    cb(null, client)
+  }
+
+  #outgoingEnqueuePerSub (sub, packet) {
+    const id = sub.clientId
+    const queue = getMapRef(this.#outgoing, id, [], CREATE_ON_EMPTY)
+    queue[queue.length] = new Packet(packet)
+  }
+
+  outgoingEnqueue (sub, packet, cb) {
+    this.#outgoingEnqueuePerSub(sub, packet)
+    process.nextTick(cb)
+  }
+
+  outgoingEnqueueCombi (subs, packet, cb) {
+    for (let i = 0; i < subs.length; i++) {
+      this.#outgoingEnqueuePerSub(subs[i], packet)
+    }
+    process.nextTick(cb)
+  }
+
+  outgoingUpdate (client, packet, cb) {
+    const outgoing = getMapRef(this.#outgoing, client.id, [], CREATE_ON_EMPTY)
+
+    let temp
+    for (let i = 0; i < outgoing.length; i++) {
+      temp = outgoing[i]
+      if (temp.brokerId === packet.brokerId) {
+        if (temp.brokerCounter === packet.brokerCounter) {
+          temp.messageId = packet.messageId
+          return cb(null, client, packet)
+        }
+        /*
+                Maximum of messageId (packet identifier) is 65535 and will be rotated,
+                brokerCounter is to ensure the packet identifier be unique.
+                The for loop is going to search which packet messageId should be updated
+                in the #outgoing queue.
+                If there is a case that brokerCounter is different but messageId is same,
+                we need to let the loop keep searching
+                */
+      } else if (temp.messageId === packet.messageId) {
+        outgoing[i] = packet
+        return cb(null, client, packet)
+      }
+    }
+
+    cb(new Error('no such packet'), client, packet)
+  }
+
+  outgoingClearMessageId (client, packet, cb) {
+    const outgoing = getMapRef(this.#outgoing, client.id, [], CREATE_ON_EMPTY)
+
+    let temp
+    for (let i = 0; i < outgoing.length; i++) {
+      temp = outgoing[i]
+      if (temp.messageId === packet.messageId) {
+        outgoing.splice(i, 1)
+        return cb(null, temp)
+      }
+    }
+
+    cb()
+  }
+
+  outgoingStream (client) {
+    // shallow clone the outgoing queue for this client to avoid race conditions
+    const outgoing = [].concat(getMapRef(this.#outgoing, client.id, []))
+    return Readable.from(outgoing)
+  }
+
+  incomingStorePacket (client, packet, cb) {
+    const id = client.id
+    const store = getMapRef(this.#incoming, id, {}, CREATE_ON_EMPTY)
+
+    store[packet.messageId] = new Packet(packet)
+    store[packet.messageId].messageId = packet.messageId
+
+    cb(null)
+  }
+
+  incomingGetPacket (client, packet, cb) {
+    const id = client.id
+    const store = getMapRef(this.#incoming, id, {})
+    let err = null
+
+    this.#incoming.set(id, store)
+
+    if (!store[packet.messageId]) {
+      err = new Error('no such packet')
+    }
+
+    cb(err, store[packet.messageId])
+  }
+
+  incomingDelPacket (client, packet, cb) {
+    const id = client.id
+    const store = getMapRef(this.#incoming, id, {})
+    const toDelete = store[packet.messageId]
+    let err = null
+
+    if (!toDelete) {
+      err = new Error('no such packet')
+    } else {
+      delete store[packet.messageId]
+    }
+
+    cb(err)
+  }
+
+  putWill (client, packet, cb) {
+    packet.brokerId = this.broker.id
+    packet.clientId = client.id
+    this.#wills.set(client.id, packet)
+    cb(null, client)
+  }
+
+  getWill (client, cb) {
+    cb(null, this.#wills.get(client.id), client)
+  }
+
+  delWill (client, cb) {
+    const will = this.#wills.get(client.id)
+    this.#wills.delete(client.id)
+    cb(null, will, client)
+  }
+
+  streamWill (brokers = {}) {
+    return Readable.from(willsByBrokers(this.#wills, brokers))
+  }
+
+  getClientList (topic) {
+    return Readable.from(clientListbyTopic(this.#subscriptions, topic))
+  }
+
+  destroy (cb) {
+    this.#retained = null
+    if (cb) {
+      cb(null)
+    }
+  }
+}
+
+function getMapRef (map, key, ifEmpty, createOnEmpty = false) {
+  const value = map.get(key)
+  if (value === undefined && createOnEmpty) {
+    map.set(key, ifEmpty)
+  }
+  return value || ifEmpty
+}
+
+module.exports = () => { return new MemoryPersistence() }
+module.exports.Packet = Packet
diff --git a/mqtt-backend/node_modules/aedes-persistence/test.js b/mqtt-backend/node_modules/aedes-persistence/test.js
new file mode 100644
index 0000000..0471cab
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-persistence/test.js
@@ -0,0 +1,10 @@
+'use strict'
+
+const test = require('tape').test
+const memory = require('./')
+const abs = require('./abstract')
+
+abs({
+  test,
+  persistence: memory
+})
diff --git a/mqtt-backend/node_modules/aedes-persistence/types/index.d.ts b/mqtt-backend/node_modules/aedes-persistence/types/index.d.ts
new file mode 100644
index 0000000..bdb17c0
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-persistence/types/index.d.ts
@@ -0,0 +1,283 @@
+import type { Brokers, Client, Subscription } from "aedes";
+import type { AedesPacket } from "aedes-packet";
+import type { Readable } from "stream";
+
+export type { AedesPacket as Packet } from "aedes-packet";
+
+type ClientId = Client["id"];
+type MessageId = AedesPacket["messageId"];
+type Topic = Subscription["topic"];
+type TopicPattern = Subscription["topic"];
+type QoS = Subscription["qos"];
+
+type Incoming = {
+  // tsc accepts:
+  // [messageId: MessageId]: AedesPacket;
+  // Workaround for tsd 0.20:
+  [messageId: number]: AedesPacket;
+};
+
+export interface AedesPersistenceSubscription {
+  clientId: ClientId;
+  topic: Topic;
+  qos?: QoS;
+}
+
+export type CallbackError = Error | null | undefined;
+
+export type WillPacket = AedesPacket & { [key: string]: any };
+
+export interface AedesPersistence {
+  storeRetained: (
+    packet: AedesPacket,
+    cb: (error: CallbackError) => void,
+  ) => void;
+
+  createRetainedStream: (pattern: TopicPattern) => Readable;
+
+  createRetainedStreamCombi: (patterns: TopicPattern[]) => Readable;
+
+  addSubscriptions: (
+    client: Client,
+    subs: Subscription[],
+    cb: (error: CallbackError, client: Client) => void,
+  ) => void;
+
+  removeSubscriptions: (
+    client: Client,
+    subs: Subscription[],
+    cb: (error: CallbackError, client: Client) => void,
+  ) => void;
+
+  subscriptionsByClient: (
+    client: Client,
+    cb: (
+      error: CallbackError,
+      subs: { topic: Topic; qos: QoS }[],
+      client: Client,
+    ) => void,
+  ) => void;
+
+  countOffline: (
+    cb: (
+      error: CallbackError,
+      subscriptionsCount: number,
+      clientsCount: number,
+    ) => void,
+  ) => void;
+
+  subscriptionsByTopic: (
+    pattern: TopicPattern,
+    cb: (error: CallbackError, subs: AedesPersistenceSubscription[]) => void,
+  ) => void;
+
+  cleanSubscriptions: (
+    client: Client,
+    cb: (error: CallbackError, client: Client) => void,
+  ) => void;
+
+  outgoingEnqueue: (
+    sub: { clientId: ClientId },
+    packet: AedesPacket,
+    cb: (error: CallbackError) => void,
+  ) => void;
+
+  outgoingEnqueueCombi: (
+    subs: { clientId: ClientId }[],
+    packet: AedesPacket,
+    cb: (error: CallbackError) => void,
+  ) => void;
+
+  outgoingUpdate: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error: CallbackError, client: Client, packet: AedesPacket) => void,
+  ) => void;
+
+  outgoingClearMessageId: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error?: CallbackError, packet?: AedesPacket) => void,
+  ) => void;
+
+  outgoingStream: (client: Client) => Readable;
+
+  incomingStorePacket: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error: CallbackError) => void,
+  ) => void;
+
+  incomingGetPacket: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error: CallbackError, packet: AedesPacket) => void,
+  ) => void;
+
+  incomingDelPacket: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error: CallbackError) => void,
+  ) => void;
+
+  putWill: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error: CallbackError, client: Client) => void,
+  ) => void;
+
+  getWill: (
+    client: Client,
+    cb: (error: CallbackError, will: WillPacket, client: Client) => void,
+  ) => void;
+
+  delWill: (
+    client: Client,
+    cb: (error: CallbackError, will: WillPacket, client: Client) => void,
+  ) => void;
+
+  streamWill: (brokers: Brokers) => Readable;
+
+  getClientList: (topic: string) => Readable;
+
+  destroy: (cb?: (error: CallbackError) => void) => void;
+}
+
+export class AedesMemoryPersistence implements AedesPersistence {
+  #retained: Map<Topic, AedesPacket>;
+  #subscriptions: Map<
+    ClientId,
+    Map<
+      Topic,
+      QoS
+    >
+  >;
+  #clientsCount: number;
+  #trie: any;
+  #outgoing: Map<ClientId, AedesPacket[]>;
+  #incoming: Map<ClientId, Incoming>;
+  #wills: Map<ClientId, WillPacket>;
+
+  constructor();
+
+  storeRetained: (
+    packet: AedesPacket,
+    cb: (error: CallbackError) => void,
+  ) => void;
+
+  createRetainedStream: (pattern: TopicPattern) => Readable;
+
+  createRetainedStreamCombi: (patterns: TopicPattern[]) => Readable;
+
+  addSubscriptions: (
+    client: Client,
+    subs: Subscription[],
+    cb: (error: CallbackError, client: Client) => void,
+  ) => void;
+
+  removeSubscriptions: (
+    client: Client,
+    subs: Subscription[],
+    cb: (error: CallbackError, client: Client) => void,
+  ) => void;
+
+  subscriptionsByClient: (
+    client: Client,
+    cb: (
+      error: CallbackError,
+      subs: { topic: string; qos: QoS }[],
+      client: Client,
+    ) => void,
+  ) => void;
+
+  countOffline: (
+    cb: (
+      error: CallbackError,
+      subscriptionsCount: number,
+      clientsCount: number,
+    ) => void,
+  ) => void;
+
+  subscriptionsByTopic: (
+    pattern: string,
+    cb: (error: CallbackError, subs: AedesPersistenceSubscription[]) => void,
+  ) => void;
+
+  cleanSubscriptions: (
+    client: Client,
+    cb: (error: CallbackError, client: Client) => void,
+  ) => void;
+
+  #outgoingEnqueuePerSub: (
+    sub: { clientId: ClientId },
+    packet: AedesPacket,
+  ) => void;
+
+  outgoingEnqueue: (
+    sub: { clientId: ClientId },
+    packet: AedesPacket,
+    cb: (error: CallbackError) => void,
+  ) => void;
+
+  outgoingEnqueueCombi: (
+    sub: { clientId: ClientId }[],
+    packet: AedesPacket,
+    cb: (error: CallbackError) => void,
+  ) => void;
+
+  outgoingUpdate: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error: CallbackError, client: Client, packet: AedesPacket) => void,
+  ) => void;
+
+  outgoingClearMessageId: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error?: CallbackError, packet?: AedesPacket) => void,
+  ) => void;
+
+  outgoingStream: (client: Client) => Readable;
+
+  incomingStorePacket: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error: CallbackError) => void,
+  ) => void;
+
+  incomingGetPacket: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error: CallbackError, packet: AedesPacket) => void,
+  ) => void;
+
+  incomingDelPacket: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error: CallbackError) => void,
+  ) => void;
+
+  putWill: (
+    client: Client,
+    packet: AedesPacket,
+    cb: (error: CallbackError, client: Client) => void,
+  ) => void;
+
+  getWill: (
+    client: Client,
+    cb: (error: CallbackError, will: WillPacket, client: Client) => void,
+  ) => void;
+
+  delWill: (
+    client: Client,
+    cb: (error: CallbackError, will: WillPacket, client: Client) => void,
+  ) => void;
+
+  streamWill: (brokers: Brokers) => Readable;
+
+  getClientList: (topic: string) => Readable;
+
+  destroy: (cb?: (error: CallbackError) => void) => void;
+}
+
+export default function aedesMemoryPersistence(): AedesMemoryPersistence;
diff --git a/mqtt-backend/node_modules/aedes-persistence/types/index.test-d.ts b/mqtt-backend/node_modules/aedes-persistence/types/index.test-d.ts
new file mode 100644
index 0000000..2249263
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes-persistence/types/index.test-d.ts
@@ -0,0 +1,168 @@
+import type { Brokers, Client, Subscription } from 'aedes';
+import type { AedesPacket } from 'aedes-packet';
+import type { QoS } from 'mqtt-packet';
+import type { Readable } from 'stream';
+import { expectType } from 'tsd';
+import aedesMemoryPersistence, {
+  AedesMemoryPersistence,
+  AedesPersistenceSubscription,
+  CallbackError,
+  WillPacket,
+} from '.';
+
+expectType<AedesMemoryPersistence>(aedesMemoryPersistence());
+
+expectType<void>(
+  aedesMemoryPersistence().storeRetained(
+    {
+      brokerId: '',
+      brokerCounter: 1,
+      cmd: 'publish',
+      qos: 0,
+      dup: false,
+      retain: false,
+      topic: 'test',
+      payload: 'test',
+    },
+    (err: CallbackError) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().addSubscriptions(
+    {} as Client,
+    [] as Subscription[],
+    (err: CallbackError) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().removeSubscriptions(
+    {} as Client,
+    [] as Subscription[],
+    (err: CallbackError) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().subscriptionsByClient(
+    {} as Client,
+    (
+      error: CallbackError,
+      subs: { topic: string; qos: QoS }[],
+      client: Client
+    ) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().countOffline(
+    (
+      error: CallbackError,
+      subscriptionsCount: number,
+      clientsCount: number
+    ) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().subscriptionsByTopic(
+    'pattern',
+    (error: CallbackError, subs: AedesPersistenceSubscription[]) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().cleanSubscriptions(
+    {} as Client,
+    (error: CallbackError, client: Client) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().outgoingEnqueue(
+    { clientId: '' },
+    {} as AedesPacket,
+    (error: CallbackError) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().outgoingEnqueueCombi(
+    [{ clientId: '' }],
+    {} as AedesPacket,
+    (error: CallbackError) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().outgoingUpdate(
+    {} as Client,
+    {} as AedesPacket,
+    (error: CallbackError, client: Client, packet: AedesPacket) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().outgoingClearMessageId(
+    {} as Client,
+    {} as AedesPacket,
+    (error: CallbackError, packet?: AedesPacket) => {}
+  )
+);
+
+expectType<Readable>(aedesMemoryPersistence().outgoingStream({} as Client));
+
+expectType<void>(
+  aedesMemoryPersistence().incomingStorePacket(
+    {} as Client,
+    {} as AedesPacket,
+    (error: CallbackError) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().incomingGetPacket(
+    {} as Client,
+    {} as AedesPacket,
+    (error: CallbackError, packet: AedesPacket) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().incomingDelPacket(
+    {} as Client,
+    {} as AedesPacket,
+    (error: CallbackError) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().putWill(
+    {} as Client,
+    {} as AedesPacket,
+    (error: CallbackError, client: Client) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().getWill(
+    {} as Client,
+    (error: CallbackError, will: WillPacket, client: Client) => {}
+  )
+);
+
+expectType<void>(
+  aedesMemoryPersistence().delWill(
+    {} as Client,
+    (error: CallbackError, will: WillPacket, client: Client) => {}
+  )
+);
+
+expectType<Readable>(aedesMemoryPersistence().streamWill({} as Brokers));
+
+expectType<Readable>(aedesMemoryPersistence().getClientList('topic'));
+
+expectType<void>(aedesMemoryPersistence().destroy());
+
+expectType<void>(aedesMemoryPersistence().destroy(() => {}));
diff --git a/mqtt-backend/node_modules/aedes/.coveralls.yml b/mqtt-backend/node_modules/aedes/.coveralls.yml
new file mode 100644
index 0000000..3131e78
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/.coveralls.yml
@@ -0,0 +1 @@
+repo_token: 0zzWBuyAWoQxHHR0JQ4jdZ12CPdvhiolr
diff --git a/mqtt-backend/node_modules/aedes/.gitattributes b/mqtt-backend/node_modules/aedes/.gitattributes
new file mode 100644
index 0000000..cad1c32
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/.gitattributes
@@ -0,0 +1,5 @@
+# Set the default behavior, in case people don't have core.autocrlf set
+* text=auto
+
+# Require Unix line endings
+* text eol=lf
diff --git a/mqtt-backend/node_modules/aedes/.github/dependabot.yml b/mqtt-backend/node_modules/aedes/.github/dependabot.yml
new file mode 100644
index 0000000..e7e0769
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/.github/dependabot.yml
@@ -0,0 +1,13 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: daily
+    open-pull-requests-limit: 10
+
+  - package-ecosystem: npm
+    directory: /
+    schedule:
+      interval: daily
+    open-pull-requests-limit: 10
diff --git a/mqtt-backend/node_modules/aedes/.github/labeler.yml b/mqtt-backend/node_modules/aedes/.github/labeler.yml
new file mode 100644
index 0000000..a7b3074
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/.github/labeler.yml
@@ -0,0 +1,7 @@
+# PRs that only touch the docs folder
+documentation:
+  - all: ["docs/**/*"]
+
+# PRs that only touch type files
+typescript:
+  - all: ["**/*[.|-]d.ts"]
diff --git a/mqtt-backend/node_modules/aedes/.github/workflows/ci.yml b/mqtt-backend/node_modules/aedes/.github/workflows/ci.yml
new file mode 100644
index 0000000..2e86405
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/.github/workflows/ci.yml
@@ -0,0 +1,78 @@
+name: CI
+
+on:
+  push:
+    paths-ignore:
+      - 'docs/**'
+      - '*.md'
+  pull_request:
+    paths-ignore:
+      - 'docs/**'
+      - '*.md'
+
+permissions:
+  contents: read
+
+jobs:
+  dependency-review:
+    name: Dependency Review
+    if: github.event_name == 'pull_request'
+    runs-on: ubuntu-latest
+    steps:
+        - name: Checkout repository
+          uses: actions/checkout@v4
+          with:
+            persist-credentials: false
+
+        - name: Dependency review
+          uses: actions/dependency-review-action@v4
+
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        node-version: [16, 18, 20]
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+      fail-fast: false
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+          check-latest: true
+          cache: npm
+          cache-dependency-path: package.json
+
+      - name: Install
+        run: |
+          npm install --ignore-scripts
+
+      - name: Check licenses
+        run: |
+          npm run license-checker
+
+      - name: Run tests
+        run: |
+          npm run test:ci
+
+      - name: Coveralls Parallel
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.github_token }}
+          parallel: true
+          flag-name: run-${{ matrix.node-version }}-${{ matrix.os }}
+
+  coverage:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Coveralls Finished
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          parallel-finished: true
diff --git a/mqtt-backend/node_modules/aedes/.github/workflows/codeql.yml b/mqtt-backend/node_modules/aedes/.github/workflows/codeql.yml
new file mode 100644
index 0000000..0170f08
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/.github/workflows/codeql.yml
@@ -0,0 +1,35 @@
+name: CodeQL
+
+on:
+  push:
+    branches-ignore:
+      - 'dependabot/**'
+  pull_request:
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    strategy:
+      fail-fast: true
+      matrix:
+        language: [ 'javascript-typescript' ]
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: ${{ matrix.language }}
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3
+        with:
+          category: "/language:${{ matrix.language }}"
diff --git a/mqtt-backend/node_modules/aedes/.github/workflows/labeler.yml b/mqtt-backend/node_modules/aedes/.github/workflows/labeler.yml
new file mode 100644
index 0000000..2199710
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/.github/workflows/labeler.yml
@@ -0,0 +1,15 @@
+name: Pull Request Labeler
+
+on: pull_request_target
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  label:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/labeler@v5
+        with:
+          repo-token: "${{ secrets.GITHUB_TOKEN }}"
diff --git a/mqtt-backend/node_modules/aedes/.taprc b/mqtt-backend/node_modules/aedes/.taprc
new file mode 100644
index 0000000..39075b0
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/.taprc
@@ -0,0 +1,6 @@
+ts: false
+jsx: false
+flow: false
+coverage: true
+strict: true
+check-coverage: false
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/aedes/CODE_OF_CONDUCT.md b/mqtt-backend/node_modules/aedes/CODE_OF_CONDUCT.md
new file mode 100644
index 0000000..0d5ca1b
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/CODE_OF_CONDUCT.md
@@ -0,0 +1,84 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our community a harassment-free experience for everyone, regardless of age, body size, visible or invisible disability, ethnicity, sex characteristics, gender identity and expression, level of experience, education, socio-economic status, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming, diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes, and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of acceptable behavior and will take appropriate and fair corrective action in response to any behavior that they deem inappropriate, threatening, offensive, or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, and will communicate reasons for moderation decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when an individual is officially representing the community in public spaces. Examples of representing our community include using an official e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported to the community leaders responsible for enforcement at hello@matteocollina.com. All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing clarity around the nature of the violation and an explanation of why the behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No interaction with the people involved, including unsolicited interaction with those enforcing the Code of Conduct, for a specified period of time. This includes avoiding interactions in community spaces as well as external channels like social media. Violating these terms may lead to a temporary or permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public communication with the community for a specified period of time. No public or private interaction with the people involved, including unsolicited interaction with those enforcing the Code of Conduct, is allowed during this period. Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community standards, including sustained inappropriate behavior,  harassment of an individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 2.0,
+available at https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at https://www.contributor-covenant.org/translations.
diff --git a/mqtt-backend/node_modules/aedes/LICENSE b/mqtt-backend/node_modules/aedes/LICENSE
new file mode 100644
index 0000000..0a28403
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/LICENSE
@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) Aedes Contributors
+Copyright (c) 2015-2020 Matteo Collina, http://matteocollina.com
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/aedes/README.md b/mqtt-backend/node_modules/aedes/README.md
new file mode 100644
index 0000000..f4771cc
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/README.md
@@ -0,0 +1,331 @@
+<!-- markdownlint-disable MD013 -->
+# Aedes
+
+![ci](https://github.com/moscajs/aedes/workflows/ci/badge.svg)
+[![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat)](https://standardjs.com/)
+[![Maintenance](https://img.shields.io/badge/Maintained%3F-yes-green.svg)](https://github.com/moscajs/aedes/graphs/commit-activity)
+[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/moscajs/aedes/pulls)\
+[![Coverage Status](https://coveralls.io/repos/moscajs/aedes/badge.svg?branch=main&service=github)](https://coveralls.io/github/moscajs/aedes?branch=main)
+[![Known Vulnerabilities](https://snyk.io/test/github/moscajs/aedes/badge.svg)](https://snyk.io/test/github/moscajs/aedes)\
+![node](https://img.shields.io/node/v/aedes)
+[![NPM version](https://img.shields.io/npm/v/aedes.svg?style=flat)](https://www.npmjs.com/aedes)
+[![NPM downloads](https://img.shields.io/npm/dm/aedes.svg?style=flat)](https://www.npmjs.com/aedes)
+
+[![opencollective](https://opencollective.com/aedes/donate/button.png)](https://opencollective.com/aedes/donate)
+
+Barebone MQTT server that can run on any stream servers
+
+- [Aedes](#aedes)
+  - [Install](#install)
+  - [Docker](#docker)
+  - [API](#api)
+  - [Features](#features)
+  - [Examples](#examples)
+  - [Clusters](#clusters)
+  - [Extensions](#extensions)
+  - [Middleware Plugins](#middleware-plugins)
+    - [Persistence](#persistence)
+    - [MQEmitter](#mqemitter)
+  - [Acknowledgements](#acknowledgements)
+  - [Mosca vs Aedes](#mosca-vs-aedes)
+    - [Benchmark: Aedes](#benchmark-aedes)
+      - [In memory - No clusters](#in-memory---no-clusters)
+      - [Redis Persistence and Redis Emitter - With Clusters](#redis-persistence-and-redis-emitter---with-clusters)
+      - [Mongo Persistence and Redis Emitter - With Clusters](#mongo-persistence-and-redis-emitter---with-clusters)
+    - [Redis Persistence and Mongodb Emitter - With Clusters](#redis-persistence-and-mongodb-emitter---with-clusters)
+    - [Benchmark: Mosca](#benchmark-mosca)
+  - [Made with Aedes](#made-with-aedes)
+  - [Collaborators](#collaborators)
+  - [Contribution](#contribution)
+  - [Support](#support)
+    - [Backers](#backers)
+    - [Sponsors](#sponsors)
+  - [License](#license)
+
+## Install
+
+To install aedes, simply use npm:
+
+```sh
+npm install aedes
+```
+
+## Docker
+
+Check Docker docs [here](https://github.com/moscajs/aedes-cli#docker)
+
+## API
+
+- [Aedes object](./docs/Aedes.md)
+- [Client object](./docs/Client.md)
+
+## Features
+
+- Full compatible with [MQTT 3.1 and 3.1.1][ISO20922]
+- Standard TCP Support
+- SSL / TLS
+- WebSocket Support
+- Message Persistence
+- Automatic Reconnect
+- Offline Buffering
+- Backpress-support API
+- High Availability
+- Clusterable
+- Authentication and Authorization
+- `$SYS` support
+- Pluggable middlewares
+- [Dynamic Topics][dynamic_topics] Support
+- MQTT Bridge Support between aedes
+- [MQTT 5.0][mqttv5] _(not support yet)_
+- [Bridge Protocol][bridge_protocol] _(incoming connections only)_
+
+## Examples
+
+- [Examples](./docs/Examples.md)
+
+## Clusters
+
+Aedes needs on disk dbs like MongoDB and Redis in order to work with clusters. Based on our tests and users reports the best performances/stability are reached when using [aedes-persistence-mongodb] paired with [mqemitter-redis].
+
+Other info:
+
+- The repo [aedes-tests](https://github.com/moscajs/aedes-tests) is used to test aedes with clusters and different emitters/persistences. Check its source code to have a starting point on how to work with clusters
+
+## Bridge connections
+
+Normally, when publishing a message, the `retain` flag is consumed by Aedes and
+then set to `false`.  This is done for two reasons:
+
+- MQTT-3.3.1-9 states that it MUST set the RETAIN flag to 0 when a PUBLISH
+  Packet is sent to a Client because it matches an established subscription
+  regardless of how the flag was set in the message it received.
+- When operating as a cluster, only one Aedes node may store the packet
+
+Brokers that support the [Bridge Protocol][bridge_protocol] can connect to
+Aedes.  When connecting with this special protocol, subscriptions work as usual
+except that the `retain` flag in the packet is propagated as-is.
+
+## Extensions
+
+- [aedes-logging]: Logging module for Aedes, based on Pino
+- [aedes-stats]: Stats for Aedes
+- [aedes-cli]: Run Aedes MQTT Broker from the CLI
+- [aedes-protocol-decoder]: Protocol decoder for Aedes MQTT Broker
+- [aedes-server-factory]: Create a server instance such as TCP, HTTP, TLS...
+
+## Middleware Plugins
+
+### Persistence
+
+- [aedes-persistence]: In-memory implementation of an Aedes persistence
+- [aedes-persistence-mongodb]: MongoDB persistence for Aedes
+- [aedes-persistence-redis]: Redis persistence for Aedes
+- [aedes-persistence-level]: LevelDB persistence for Aedes
+- [aedes-persistence-nedb]: NeDB persistence for Aedes
+
+### MQEmitter
+
+- [mqemitter]: An opinionated memory Message Queue with an emitter-style API
+- [mqemitter-redis]: Redis-powered mqemitter
+- [mqemitter-mongodb]: Mongodb based mqemitter
+- [mqemitter-child-process]: Share the same mqemitter between a hierarchy of
+  child processes
+- [mqemitter-cs]: Expose a MQEmitter via a simple client/server protocol
+- [mqemitter-p2p]: A P2P implementation of MQEmitter, based on HyperEmitter and
+  a Merkle DAG
+- [mqemitter-aerospike]: Aerospike mqemitter
+
+## Acknowledgements
+
+This library is born after a lot of discussion with all
+[Mosca](http://www.npmjs.com/mosca) users and how that was deployed in
+production. This addresses your concerns about performance and stability.
+
+## Mosca vs Aedes
+
+Example benchmark test with 1000 clients sending 5000 QoS 1 messsages. Used
+[mqtt-benchmark] with command:
+
+```sh
+mqtt-benchmark --broker tcp://localhost:1883 --clients 1000 --qos 1 --count 5000
+```
+
+CPU INFO:
+
+```sh
+Architecture:        x86_64
+CPU op-mode(s):      32-bit, 64-bit
+Byte Order:          Little Endian
+CPU(s):              8
+On-line CPU(s) list: 0-7
+Thread(s) per core:  2
+Core(s) per socket:  4
+Socket(s):           1
+NUMA node(s):        1
+Vendor ID:           GenuineIntel
+CPU family:          6
+Model:               94
+Model name:          Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz
+Stepping:            3
+CPU MHz:             800.014
+CPU max MHz:         3500,0000
+CPU min MHz:         800,0000
+BogoMIPS:            5199.98
+Virtualization:      VT-x
+L1d cache:           32K
+L1i cache:           32K
+L2 cache:            256K
+L3 cache:            6144K
+```
+
+### Benchmark: Aedes
+
+#### In memory - No clusters
+
+```sh
+========= TOTAL (1000) =========
+Total Ratio:                 1.000 (5000000/5000000)
+Total Runtime (sec):         178.495
+Average Runtime (sec):       177.845
+Msg time min (ms):           0.077
+Msg time max (ms):           199.805
+Msg time mean mean (ms):     35.403
+Msg time mean std (ms):      0.042
+Average Bandwidth (msg/sec): 28.115
+Total Bandwidth (msg/sec):   28114.678
+```
+
+#### Redis Persistence and Redis Emitter - With Clusters
+
+```sh
+========= TOTAL (1000) =========
+Total Ratio:                 1.000 (5000000/5000000)
+Total Runtime (sec):         114.404
+Average Runtime (sec):       109.022
+Msg time min (ms):           0.065
+Msg time max (ms):           393.214
+Msg time mean mean (ms):     21.520
+Msg time mean std (ms):      0.595
+Average Bandwidth (msg/sec): 45.896
+Total Bandwidth (msg/sec):   45896.306
+```
+
+#### Mongo Persistence and Redis Emitter - With Clusters
+
+```sh
+========= TOTAL (1000) =========
+Total Ratio:                 1.000 (5000000/5000000)
+Total Runtime (sec):         112.769
+Average Runtime (sec):       105.524
+Msg time min (ms):           0.062
+Msg time max (ms):           329.062
+Msg time mean mean (ms):     20.750
+Msg time mean std (ms):      0.878
+Average Bandwidth (msg/sec): 47.464
+Total Bandwidth (msg/sec):   47464.271
+```
+
+### Redis Persistence and Mongodb Emitter - With Clusters
+
+```sh
+========= TOTAL (1000) =========
+Total Ratio:                 1.000 (5000000/5000000)
+Total Runtime (sec):         118.587
+Average Runtime (sec):       114.190
+Msg time min (ms):           0.080
+Msg time max (ms):           324.028
+Msg time mean mean (ms):     22.558
+Msg time mean std (ms):      0.730
+Average Bandwidth (msg/sec): 43.832
+Total Bandwidth (msg/sec):   43831.927
+```
+
+### Benchmark: [Mosca](http://www.npmjs.com/mosca)
+
+```sh
+========= TOTAL (1000) =========
+Total Ratio:                 1.000 (5000000/5000000)
+Total Runtime (sec):         264.934
+Average Runtime (sec):       264.190
+Msg time min (ms):           0.070
+Msg time max (ms):           168.116
+Msg time mean mean (ms):     52.629
+Msg time mean std (ms):      0.074
+Average Bandwidth (msg/sec): 18.926
+Total Bandwidth (msg/sec):   18925.942
+```
+
+## Made with Aedes
+
+Here is a list of some interesting projects that are using Aedes as MQTT Broker. Submit a PR or an issue if you would like to add yours
+
+- [node-red-contrib-aedes](https://github.com/martin-doyle/node-red-contrib-aedes): MQTT broker for Node-Red based on Aedes
+- [Mqtt2Mqtt](https://github.com/robertsLando/Mqtt2Mqtt): Mqtt Bridge between two brokers with UI
+- [Kuzzle](https://github.com/kuzzleio/kuzzle): High performance and full featured IoT backend using MQTT alongside WebSocket and Http protocols
+
+## Collaborators
+
+- [__Gavin D'mello__](https://github.com/GavinDmello)
+- [__Behrad Zari__](https://github.com/behrad)
+- [__Gnought__](https://github.com/gnought)
+- [__Daniel Lando__](https://github.com/robertsLando)
+- [__Getlarge__](https://github.com/getlarge)
+
+## Contribution
+
+[![Help wanted](https://img.shields.io/github/labels/moscajs/aedes/help%20wanted)](https://github.com/moscajs/aedes/labels/help%20wanted)
+[![Contributors](https://img.shields.io/github/contributors/moscajs/aedes)](https://github.com/moscajs/aedes/graphs/contributors)
+
+Want to contribute? Check our list of
+[features/bugs](https://github.com/moscajs/aedes/projects/1)
+
+## Security notice
+
+Messages sent to the broker are considered _valid_ once they pass the [`authorizePublish`](./docs/Aedes.md#handler-authorizepublish-client-packet-callback) callback.
+In other terms, if permissions for the given client are revoked after the call completes, the message is still considered valid.
+In case you are sending time-sensitive messages, make sure to use QoS 0 or connect with a clean session.
+
+## Support
+
+If there are bugs/leaks in production scenarios, we encourage people to send Pull Request and/or reach out maintainers for some paid support.
+
+### Backers
+
+Thank you to all our backers! :raised_hands:
+
+[![Backers](https://opencollective.com/aedes/backers.svg?avatarHeight=64&width=890&button=false)](https://opencollective.com/aedes#backers)
+
+### Sponsors
+
+Become a sponsor to get your logo on our README on Github
+
+[![Sponsor](https://opencollective.com/aedes/sponsors.svg)](https://opencollective.com/aedes#sponsor)
+
+## License
+
+Licensed under [MIT](./LICENSE).
+
+[ISO20922]: https://docs.oasis-open.org/mqtt/mqtt/v3.1.1/mqtt-v3.1.1.html
+[mqttv5]: https://docs.oasis-open.org/mqtt/mqtt/v5.0/mqtt-v5.0.html
+[bridge_protocol]: https://github.com/mqtt/mqtt.github.io/wiki/bridge_protocol
+[dynamic_topics]: https://github.com/mqtt/mqtt.github.io/wiki/are_topics_dynamic
+[mqtt-benchmark]: https://github.com/krylovsk/mqtt-benchmark
+
+[aedes-logging]: https://www.npmjs.com/aedes-logging
+[aedes-stats]: https://www.npmjs.com/aedes-stats
+[aedes-cli]: https://www.npmjs.com/aedes-cli
+[aedes-protocol-decoder]: https://www.npmjs.com/aedes-protocol-decoder
+[aedes-server-factory]: https://www.npmjs.com/aedes-server-factory
+[aedes-persistence]: https://www.npmjs.com/aedes-persistence
+[aedes-persistence-mongodb]: https://www.npmjs.com/aedes-persistence-mongodb
+[aedes-persistence-redis]: https://www.npmjs.com/aedes-persistence-redis
+[aedes-persistence-level]: https://www.npmjs.com/aedes-persistence-level
+[aedes-persistence-nedb]: https://www.npmjs.com/aedes-persistence-nedb
+
+[mqemitter]: https://www.npmjs.com/mqemitter
+[mqemitter-redis]: https://www.npmjs.com/mqemitter-redis
+[mqemitter-mongodb]: https://www.npmjs.com/mqemitter-mongodb
+[mqemitter-child-process]: https://www.npmjs.com/mqemitter-child-process
+[mqemitter-cs]: https://www.npmjs.com/mqemitter-cs
+[mqemitter-p2p]: https://www.npmjs.com/mqemitter-p2p
+[mqemitter-aerospike]: https://www.npmjs.com/mqemitter-aerospike
diff --git a/mqtt-backend/node_modules/aedes/SECURITY.md b/mqtt-backend/node_modules/aedes/SECURITY.md
new file mode 100644
index 0000000..6000d73
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/SECURITY.md
@@ -0,0 +1,5 @@
+# Security Policy
+
+## Reporting a Vulnerability
+
+Please report all vulnerabilities to [https://github.com/moscajs/aedes/security](https://github.com/moscajs/aedes/security).
diff --git a/mqtt-backend/node_modules/aedes/aedes.d.ts b/mqtt-backend/node_modules/aedes/aedes.d.ts
new file mode 100644
index 0000000..fa54adf
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/aedes.d.ts
@@ -0,0 +1,9 @@
+import Aedes, { AedesOptions } from './types/instance'
+
+export declare function createBroker(options?: AedesOptions): Aedes
+
+export * from './types/instance'
+export * from './types/packet'
+export * from './types/client'
+
+export { default } from './types/instance'
diff --git a/mqtt-backend/node_modules/aedes/aedes.js b/mqtt-backend/node_modules/aedes/aedes.js
new file mode 100644
index 0000000..283351b
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/aedes.js
@@ -0,0 +1,386 @@
+'use strict'
+
+const EventEmitter = require('events')
+const util = require('util')
+const parallel = require('fastparallel')
+const series = require('fastseries')
+const { v4: uuidv4 } = require('uuid')
+const reusify = require('reusify')
+const { pipeline } = require('stream')
+const Packet = require('aedes-packet')
+const memory = require('aedes-persistence')
+const mqemitter = require('mqemitter')
+const Client = require('./lib/client')
+const { $SYS_PREFIX, bulk } = require('./lib/utils')
+
+module.exports = Aedes.createBroker = Aedes
+
+const defaultOptions = {
+  concurrency: 100,
+  heartbeatInterval: 60000, // 1 minute
+  connectTimeout: 30000, // 30 secs
+  decodeProtocol: null,
+  preConnect: defaultPreConnect,
+  authenticate: defaultAuthenticate,
+  authorizePublish: defaultAuthorizePublish,
+  authorizeSubscribe: defaultAuthorizeSubscribe,
+  authorizeForward: defaultAuthorizeForward,
+  published: defaultPublished,
+  trustProxy: false,
+  trustedProxies: [],
+  queueLimit: 42,
+  maxClientsIdLength: 23,
+  keepaliveLimit: 0
+}
+
+function Aedes (opts) {
+  const that = this
+
+  if (!(this instanceof Aedes)) {
+    return new Aedes(opts)
+  }
+
+  opts = Object.assign({}, defaultOptions, opts)
+
+  this.id = opts.id || uuidv4()
+  // +1 when construct a new aedes-packet
+  // internal track for last brokerCounter
+  this.counter = 0
+  this.queueLimit = opts.queueLimit
+  this.connectTimeout = opts.connectTimeout
+  this.keepaliveLimit = opts.keepaliveLimit
+  this.maxClientsIdLength = opts.maxClientsIdLength
+  this.mq = opts.mq || mqemitter({
+    concurrency: opts.concurrency,
+    matchEmptyLevels: true // [MQTT-4.7.1-3]
+  })
+  this.handle = function handle (conn, req) {
+    conn.setMaxListeners(opts.concurrency * 2)
+    // create a new Client instance for a new connection
+    // return, just to please standard
+    return new Client(that, conn, req)
+  }
+  this.persistence = opts.persistence || memory()
+  this.persistence.broker = this
+  this._parallel = parallel()
+  this._series = series()
+  this._enqueuers = reusify(DoEnqueues)
+
+  this.preConnect = opts.preConnect
+  this.authenticate = opts.authenticate
+  this.authorizePublish = opts.authorizePublish
+  this.authorizeSubscribe = opts.authorizeSubscribe
+  this.authorizeForward = opts.authorizeForward
+  this.published = opts.published
+
+  this.decodeProtocol = opts.decodeProtocol
+  this.trustProxy = opts.trustProxy
+  this.trustedProxies = opts.trustedProxies
+
+  this.clients = {}
+  this.brokers = {}
+
+  const heartbeatTopic = $SYS_PREFIX + that.id + '/heartbeat'
+  const birthTopic = $SYS_PREFIX + that.id + '/birth'
+
+  this._heartbeatInterval = setInterval(heartbeat, opts.heartbeatInterval)
+
+  const bufId = Buffer.from(that.id, 'utf8')
+
+  // in a cluster env this is used to warn other broker instances
+  // that this broker is alive
+  that.publish({
+    topic: birthTopic,
+    payload: bufId
+  }, noop)
+
+  function heartbeat () {
+    that.publish({
+      topic: heartbeatTopic,
+      payload: bufId
+    }, noop)
+  }
+
+  function deleteOldBrokers (broker) {
+    if (that.brokers[broker] + (3 * opts.heartbeatInterval) < Date.now()) {
+      delete that.brokers[broker]
+    }
+  }
+
+  this._clearWillInterval = setInterval(function () {
+    Object.keys(that.brokers).forEach(deleteOldBrokers)
+
+    pipeline(
+      that.persistence.streamWill(that.brokers),
+      bulk(receiveWills),
+      function done (err) {
+        if (err) {
+          that.emit('error', err)
+        }
+      }
+    )
+  }, opts.heartbeatInterval * 4)
+
+  function receiveWills (chunks, done) {
+    that._parallel(that, checkAndPublish, chunks, done)
+  }
+
+  function checkAndPublish (will, done) {
+    const notPublish =
+      that.brokers[will.brokerId] !== undefined && that.brokers[will.brokerId] + (3 * opts.heartbeatInterval) >= Date.now()
+
+    if (notPublish) return done()
+
+    // randomize this, so that multiple brokers
+    // do not publish the same wills at the same time
+    this.authorizePublish(that.clients[will.clientId] || null, will, function (err) {
+      if (err) { return doneWill() }
+      that.publish(will, doneWill)
+
+      function doneWill (err) {
+        if (err) { return done(err) }
+        that.persistence.delWill({
+          id: will.clientId,
+          brokerId: will.brokerId
+        }, done)
+      }
+    })
+  }
+
+  this.mq.on($SYS_PREFIX + '+/heartbeat', function storeBroker (packet, done) {
+    that.brokers[packet.payload.toString()] = Date.now()
+    done()
+  })
+
+  this.mq.on($SYS_PREFIX + '+/birth', function brokerBorn (packet, done) {
+    const brokerId = packet.payload.toString()
+
+    // reset duplicates counter
+    if (brokerId !== that.id) {
+      for (const clientId in that.clients) {
+        delete that.clients[clientId].duplicates[brokerId]
+      }
+    }
+
+    done()
+  })
+
+  this.mq.on($SYS_PREFIX + '+/new/clients', function closeSameClients (packet, done) {
+    const serverId = packet.topic.split('/')[1]
+    const clientId = packet.payload.toString()
+
+    if (that.clients[clientId] && serverId !== that.id) {
+      if (that.clients[clientId].closed) {
+        // remove the client from the list if it is already closed
+        that.deleteClient(clientId)
+        done()
+      } else {
+        that.clients[clientId].close(done)
+      }
+    } else {
+      done()
+    }
+  })
+
+  // metadata
+  this.connectedClients = 0
+  this.closed = false
+}
+
+util.inherits(Aedes, EventEmitter)
+
+function storeRetained (packet, done) {
+  if (packet.retain) {
+    this.broker.persistence.storeRetained(packet, done)
+  } else {
+    done()
+  }
+}
+
+function emitPacket (packet, done) {
+  if (this.client) packet.clientId = this.client.id
+  this.broker.mq.emit(packet, done)
+}
+
+function enqueueOffline (packet, done) {
+  const enqueuer = this.broker._enqueuers.get()
+
+  enqueuer.complete = done
+  enqueuer.packet = packet
+  enqueuer.topic = packet.topic
+  enqueuer.broker = this.broker
+  this.broker.persistence.subscriptionsByTopic(
+    packet.topic,
+    enqueuer.done
+  )
+}
+
+function DoEnqueues () {
+  this.next = null
+  this.complete = null
+  this.packet = null
+  this.topic = null
+  this.broker = null
+
+  const that = this
+
+  this.done = function doneEnqueue (err, subs) {
+    const broker = that.broker
+
+    if (err) {
+      // is this really recoverable?
+      // let's just error the whole aedes
+      // https://nodejs.org/api/events.html#events_error_events
+      broker.emit('error', err)
+      return
+    }
+
+    if (that.topic.indexOf($SYS_PREFIX) === 0) {
+      subs = subs.filter(removeSharp)
+    }
+
+    const packet = that.packet
+    const complete = that.complete
+
+    that.packet = null
+    that.complete = null
+    that.topic = null
+
+    broker.persistence.outgoingEnqueueCombi(subs, packet, complete)
+    broker._enqueuers.release(that)
+  }
+}
+
+// + is 43
+// # is 35
+function removeSharp (sub) {
+  const code = sub.topic.charCodeAt(0)
+  return code !== 43 && code !== 35
+}
+
+function callPublished (_, done) {
+  this.broker.published(this.packet, this.client, done)
+  this.broker.emit('publish', this.packet, this.client)
+}
+
+const publishFuncsSimple = [
+  storeRetained,
+  emitPacket,
+  callPublished
+]
+const publishFuncsQoS = [
+  storeRetained,
+  enqueueOffline,
+  emitPacket,
+  callPublished
+]
+Aedes.prototype.publish = function (packet, client, done) {
+  if (typeof client === 'function') {
+    done = client
+    client = null
+  }
+  const p = new Packet(packet, this)
+  const publishFuncs = p.qos > 0 ? publishFuncsQoS : publishFuncsSimple
+
+  this._series(new PublishState(this, client, packet), publishFuncs, p, done)
+}
+
+Aedes.prototype.subscribe = function (topic, func, done) {
+  this.mq.on(topic, func, done)
+}
+
+Aedes.prototype.unsubscribe = function (topic, func, done) {
+  this.mq.removeListener(topic, func, done)
+}
+
+Aedes.prototype.registerClient = function (client) {
+  const that = this
+  if (this.clients[client.id]) {
+    // [MQTT-3.1.4-2]
+    this.clients[client.id].close(function closeClient () {
+      that._finishRegisterClient(client)
+    })
+  } else {
+    this._finishRegisterClient(client)
+  }
+}
+
+Aedes.prototype._finishRegisterClient = function (client) {
+  this.connectedClients++
+  this.clients[client.id] = client
+  this.emit('client', client)
+  this.publish({
+    topic: $SYS_PREFIX + this.id + '/new/clients',
+    payload: Buffer.from(client.id, 'utf8')
+  }, noop)
+}
+
+Aedes.prototype.unregisterClient = function (client) {
+  this.deleteClient(client.id)
+  this.emit('clientDisconnect', client)
+  this.publish({
+    topic: $SYS_PREFIX + this.id + '/disconnect/clients',
+    payload: Buffer.from(client.id, 'utf8')
+  }, noop)
+}
+
+Aedes.prototype.deleteClient = function (clientId) {
+  this.connectedClients--
+  delete this.clients[clientId]
+}
+
+function closeClient (client, cb) {
+  this.clients[client].close(cb)
+}
+
+Aedes.prototype.close = function (cb = noop) {
+  const that = this
+  if (this.closed) {
+    return cb()
+  }
+  this.closed = true
+  clearInterval(this._heartbeatInterval)
+  clearInterval(this._clearWillInterval)
+  this._parallel(this, closeClient, Object.keys(this.clients), doneClose)
+  function doneClose () {
+    that.emit('closed')
+    that.mq.close(cb)
+  }
+}
+
+Aedes.prototype.version = require('./package.json').version
+
+function defaultPreConnect (client, packet, callback) {
+  callback(null, true)
+}
+
+function defaultAuthenticate (client, username, password, callback) {
+  callback(null, true)
+}
+
+function defaultAuthorizePublish (client, packet, callback) {
+  if (packet.topic.startsWith($SYS_PREFIX)) {
+    return callback(new Error($SYS_PREFIX + ' topic is reserved'))
+  }
+  callback(null)
+}
+
+function defaultAuthorizeSubscribe (client, sub, callback) {
+  callback(null, sub)
+}
+
+function defaultAuthorizeForward (client, packet) {
+  return packet
+}
+
+function defaultPublished (packet, client, callback) {
+  callback(null)
+}
+
+function PublishState (broker, client, packet) {
+  this.broker = broker
+  this.client = client
+  this.packet = packet
+}
+
+function noop () {}
diff --git a/mqtt-backend/node_modules/aedes/benchmarks/bombing.js b/mqtt-backend/node_modules/aedes/benchmarks/bombing.js
new file mode 100644
index 0000000..667b88f
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/benchmarks/bombing.js
@@ -0,0 +1,34 @@
+#! /usr/bin/env node
+
+const mqtt = require('mqtt')
+const client = mqtt.connect({ port: 1883, host: 'localhost', clean: true, keepalive: 0 })
+const interval = 5000
+
+let sent = 0
+
+function count () {
+  console.log('sent/s', sent / interval * 1000)
+  sent = 0
+}
+
+setInterval(count, interval)
+
+function immediatePublish () {
+  setImmediate(publish)
+}
+
+function publish () {
+  sent++
+  client.publish('test', 'payload', immediatePublish)
+}
+
+client.on('connect', publish)
+
+client.on('offline', function () {
+  console.log('offline')
+})
+
+client.on('error', function () {
+  console.log('reconnect!')
+  client.stream.end()
+})
diff --git a/mqtt-backend/node_modules/aedes/benchmarks/bombingQoS1.js b/mqtt-backend/node_modules/aedes/benchmarks/bombingQoS1.js
new file mode 100644
index 0000000..b2ee2de
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/benchmarks/bombingQoS1.js
@@ -0,0 +1,36 @@
+#! /usr/bin/env node
+
+const mqtt = require('mqtt')
+const client = mqtt.connect({ port: 1883, host: 'localhost', clean: true, keepalive: 0 })
+const interval = 5000
+
+let sent = 0
+
+function count () {
+  console.log('sent/s', sent / interval * 1000)
+  sent = 0
+}
+
+setInterval(count, interval)
+
+function publish () {
+  sent++
+  client.publish('test', 'payload', { qos: 1 }, publish)
+}
+
+client.setMaxListeners(100)
+
+client.on('connect', function () {
+  for (let i = 0; i < 50; i++) {
+    publish()
+  }
+})
+
+client.on('offline', function () {
+  console.log('offline')
+})
+
+client.on('error', function () {
+  console.log('reconnect!')
+  client.stream.end()
+})
diff --git a/mqtt-backend/node_modules/aedes/benchmarks/pingpong.js b/mqtt-backend/node_modules/aedes/benchmarks/pingpong.js
new file mode 100644
index 0000000..9aa8aac
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/benchmarks/pingpong.js
@@ -0,0 +1,53 @@
+#! /usr/bin/env node
+
+const mqtt = require('mqtt')
+const convertHrtime = require('convert-hrtime')
+const mode = require('compute-mode')
+const client = mqtt.connect({ port: 1883, host: 'localhost', clean: true, keepalive: 0 })
+const interval = 5000
+
+let sent = 0
+const latencies = []
+
+function count () {
+  console.log('sent/s', sent / interval * 1000)
+  sent = 0
+}
+
+setInterval(count, interval)
+
+function publish () {
+  sent++
+  client.publish('test', JSON.stringify(process.hrtime()), { qos: 1 })
+}
+
+function subscribe () {
+  client.subscribe('test', { qos: 1 }, publish)
+}
+
+client.on('connect', subscribe)
+client.on('message', publish)
+client.on('message', function (topic, payload) {
+  const sentAt = JSON.parse(payload)
+  const diff = process.hrtime(sentAt)
+  latencies.push(convertHrtime(diff).ms)
+})
+
+client.on('offline', function () {
+  console.log('offline')
+})
+
+client.on('error', function () {
+  console.log('reconnect!')
+  client.stream.end()
+})
+
+process.on('SIGINT', function () {
+  const total = latencies.reduce(function (acc, num) {
+    return acc + num
+  })
+  console.log('total', total)
+  console.log('average', total / latencies.length)
+  console.log('mode', mode(latencies))
+  process.exit(0)
+})
diff --git a/mqtt-backend/node_modules/aedes/benchmarks/server.js b/mqtt-backend/node_modules/aedes/benchmarks/server.js
new file mode 100644
index 0000000..49b69e7
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/benchmarks/server.js
@@ -0,0 +1,25 @@
+'use strict'
+
+// To be used with cpuprofilify http://npm.im/cpuprofilify
+
+const aedes = require('../')()
+const server = require('net').createServer(aedes.handle)
+const port = 1883
+
+server.listen(port, function () {
+  console.error('server listening on port', port, 'pid', process.pid)
+})
+
+aedes.on('clientError', function (client, err) {
+  console.error('client error', client.id, err.message)
+})
+
+// Cleanly shut down process on SIGTERM to ensure that perf-<pid>.map gets flushed
+process.on('SIGINT', onSIGINT)
+
+function onSIGINT () {
+  // IMPORTANT to log on stderr, to not clutter stdout which is purely for data, i.e. dtrace stacks
+  console.error('Caught SIGTERM, shutting down.')
+  server.close()
+  process.exit(0)
+}
diff --git a/mqtt-backend/node_modules/aedes/benchmarks/throughputCounter.js b/mqtt-backend/node_modules/aedes/benchmarks/throughputCounter.js
new file mode 100644
index 0000000..122443d
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/benchmarks/throughputCounter.js
@@ -0,0 +1,23 @@
+#! /usr/bin/env node
+
+const mqtt = require('mqtt')
+
+const client = mqtt.connect({ port: 1883, host: 'localhost', clean: true, encoding: 'binary', keepalive: 0 })
+const interval = 5000
+
+let counter = 0
+
+function count () {
+  console.log('received/s', counter / interval * 1000)
+  counter = 0
+}
+
+setInterval(count, interval)
+
+client.on('connect', function () {
+  count()
+  this.subscribe('test')
+  this.on('message', function () {
+    counter++
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/benchmarks/throughputCounterQoS1.js b/mqtt-backend/node_modules/aedes/benchmarks/throughputCounterQoS1.js
new file mode 100644
index 0000000..de7f567
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/benchmarks/throughputCounterQoS1.js
@@ -0,0 +1,33 @@
+#! /usr/bin/env node
+
+const mqtt = require('mqtt')
+
+const client = mqtt.connect({ port: 1883, host: 'localhost', clean: true, encoding: 'binary', keepalive: 0 })
+const interval = 5000
+
+let counter = 0
+
+function count () {
+  console.log('received/s', counter / interval * 1000)
+  counter = 0
+}
+
+setInterval(count, interval)
+
+client.on('connect', function () {
+  this.subscribe('test', { qos: 1 })
+})
+
+client.handleMessage = function (packet, done) {
+  counter++
+  done()
+}
+
+client.on('offline', function () {
+  console.log('offline')
+})
+
+client.on('error', function () {
+  console.log('reconnect!')
+  client.stream.end()
+})
diff --git a/mqtt-backend/node_modules/aedes/docs/Aedes.md b/mqtt-backend/node_modules/aedes/docs/Aedes.md
new file mode 100644
index 0000000..46bc4dc
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/docs/Aedes.md
@@ -0,0 +1,416 @@
+<!-- markdownlint-disable MD013 MD024 -->
+# Aedes
+
+- [Aedes](#aedes)
+  - [new Aedes([options]) / new Aedes.Server([options])](#new-aedesoptions--new-aedesserveroptions)
+  - [aedes.id](#aedesid)
+  - [aedes.connectedClients](#aedesconnectedclients)
+  - [aedes.closed](#aedesclosed)
+  - [Event: client](#event-client)
+  - [Event: clientReady](#event-clientready)
+  - [Event: clientDisconnect](#event-clientdisconnect)
+  - [Event: clientError](#event-clienterror)
+  - [Event: connectionError](#event-connectionerror)
+  - [Event: keepaliveTimeout](#event-keepalivetimeout)
+  - [Event: publish](#event-publish)
+  - [Event: ack](#event-ack)
+  - [Event: ping](#event-ping)
+  - [Event: subscribe](#event-subscribe)
+  - [Event: unsubscribe](#event-unsubscribe)
+  - [Event: connackSent](#event-connacksent)
+  - [Event: closed](#event-closed)
+  - [aedes.handle (stream)](#aedeshandle-stream)
+  - [aedes.subscribe (topic, deliverfunc, callback)](#aedessubscribe-topic-deliverfunc-callback)
+  - [aedes.unsubscribe (topic, deliverfunc, callback)](#aedesunsubscribe-topic-deliverfunc-callback)
+  - [aedes.publish (packet, callback)](#aedespublish-packet-callback)
+  - [aedes.close ([callback])](#aedesclose-callback)
+  - [Handler: preConnect (client, packet, callback)](#handler-preconnect-client-packet-callback)
+  - [Handler: authenticate (client, username, password, callback)](#handler-authenticate-client-username-password-callback)
+  - [Handler: authorizePublish (client, packet, callback)](#handler-authorizepublish-client-packet-callback)
+  - [Handler: authorizeSubscribe (client, subscription, callback)](#handler-authorizesubscribe-client-subscription-callback)
+  - [Handler: authorizeForward (client, packet)](#handler-authorizeforward-client-packet)
+  - [Handler: published (packet, client, callback)](#handler-published-packet-client-callback)
+
+## new Aedes([options]) / new Aedes.Server([options])
+
+- options `<object>`
+  - `mq` [`<MQEmitter>`](../README.md#mqemitter) middleware used to deliver messages to subscribed clients. In a cluster environment it is used also to share messages between brokers instances. __Default__: `mqemitter`
+  - `concurrency` `<number>` maximum number of concurrent messages delivered by `mq`. __Default__: `100`
+  - `persistence` [`<Persistence>`](../README.md#persistence) middleware that stores _QoS > 0, retained, will_ packets and _subscriptions_. __Default__: `aedes-persistence` (_in memory_)
+  - `queueLimit` `<number>` maximum number of queued messages before client session is established. If number of queued items exceeds, `connectionError` throws an error `Client queue limit reached`. __Default__: `42`
+  - `maxClientsIdLength` option to override MQTT 3.1.0 clients Id length limit. __Default__: `23`
+  - `heartbeatInterval` `<number>` an interval in millisconds at which server beats its health signal in `$SYS/<aedes.id>/heartbeat` topic. __Default__: `60000`
+  - `id` `<string>` aedes broker unique identifier. __Default__: `uuidv4()`
+  - `connectTimeout` `<number>` maximum waiting time in milliseconds waiting for a [`CONNECT`][CONNECT] packet. __Default__: `30000`
+  - `keepaliveLimit` `<number>` maximum client keep alive time allowed, 0 means no limit. __Default__: `0`
+- Returns `<Aedes>`
+
+Create a new Aedes server.
+
+Aedes is the class and function exposed by this module. It can be created by `Aedes()` or using `new Aedes()`. An variant `aedes.Server` is for TypeScript or ES modules.
+
+## aedes.id
+
+- `<string>` __Default__: `uuidv4()`
+
+Server unique identifier.
+
+## aedes.connectedClients
+
+- `<number>` __Default__: 0
+
+Number of connected clients in server.
+
+## aedes.closed
+
+- `<boolean>` __Default__: false
+
+a read-only flag indicates if server is closed or not.
+
+## Event: client
+
+- `client` [`<Client>`](./Client.md)
+
+Emitted when the `client` registers itself to server. The `client` is not ready yet. Its [`connecting`](./Client.md##clientconnecting) state equals to `true`.
+
+Server publishes a SYS topic `$SYS/<aedes.id>/new/clients` to inform it registers the client into its registration pool. `client.id` is the payload.
+
+## Event: clientReady
+
+- `client` [`<Client>`](./Client.md)
+
+Emitted when the `client` has received all its offline messages and be initialized. The `client` [`connected`](./Client.md##clientconnected) state equals to `true` and is ready for processing incoming messages.
+
+## Event: clientDisconnect
+
+- `client` [`<Client>`](./Client.md)
+
+Emitted when a client disconnects.
+
+Server publishes a SYS topic `$SYS/<aedes.id>/disconnect/clients` to inform it deregisters the client. `client.id` is the payload.
+
+## Event: clientError
+
+- `client` [`<Client>`](./Client.md)
+- `error` `<Error>`
+
+Emitted when an error occurs.
+
+## Event: connectionError
+
+- `client` [`<Client>`](./Client.md)
+- `error` `<Error>`
+
+Emitted when an error occurs. Unlike `clientError` it raises only when `client` is uninitialized.
+
+## Event: keepaliveTimeout
+
+- `client` [`<Client>`](./Client.md)
+
+Emitted when timeout happes in the `client` keepalive.
+
+## Event: publish
+
+- `packet` `<aedes-packet>` & [`PUBLISH`][PUBLISH]
+- `client` [`<Client>`](./Client.md) | `null`
+
+Emitted when servers delivers the `packet` to subscribed `client`. If there are no clients subscribed to the `packet` topic, server still publish the `packet` and emit the event. `client` is `null` when `packet` is an internal message like aedes heartbeat message and LWT.
+
+> _Note! `packet` belongs `aedes-packet` type. Some properties belongs to aedes internal, any changes on them will break aedes internal flow._
+
+## Event: ack
+
+- `packet` `<object>` [`PUBLISH`][PUBLISH] for QoS 1, [`PUBREL`][PUBREL] for QoS 2
+- `client` [`<Client>`](./Client.md)
+
+Emitted an QoS 1 or 2 acknowledgement when the `packet` successfully delivered to the `client`.
+
+## Event: ping
+
+- `packet` `<object>` [`PINGREQ`][PINGREQ]
+- `client` [`<Client>`](./Client.md)
+
+Emitted when `client` sends a `PINGREQ`.
+
+## Event: subscribe
+
+- `subscriptions` `<object>`
+- `client` [`<Client>`](./Client.md)
+
+Emitted when `client` successfully subscribe the `subscriptions` in server.
+
+`subscriptions` is an array of `{ topic: topic, qos: qos }`. The array excludes duplicated topics and includes negated subscriptions where `qos` equals to `128`. See more on [authorizeSubscribe](#handler-authorizesubscribe-client-subscription-callback)
+
+Server publishes a SYS topic `$SYS/<aedes.id>/new/subscribers` to inform a client successfully subscribed to one or more topics. The payload is a JSON that has `clientId` and `subs` props, `subs` equals to `subscriptions` array.
+
+## Event: unsubscribe
+
+- `unsubscriptions` `Array<string>`
+- `client` [`<Client>`](./Client.md)
+
+Emitted when `client` successfully unsubscribe the `subscriptions` in server.
+
+`unsubscriptions` are an array of unsubscribed topics.
+
+Server publishes a SYS topic `$SYS/<aedes.id>/new/unsubscribers` to inform a client successfully unsubscribed to one or more topics. The payload is a JSON that has `clientId` and `subs` props, `subs` equals to `unsubscriptions` array.
+
+## Event: connackSent
+
+- `packet` `<object>` [`CONNACK`][CONNACK]
+- `client` [`<Client>`](./Client.md)
+
+Emitted when server sends an acknowledge to `client`. Please refer to the MQTT specification for the explanation of returnCode object property in `CONNACK`.
+
+## Event: closed
+
+Emitted when server is closed.
+
+## aedes.handle (stream)
+
+- stream: `<net.Socket>` | `<stream.Duplex>`
+- Returns: [`<Client>`](./Client.md)
+
+A connection listener that pipe stream to aedes.
+
+```js
+const aedes = require('./aedes')()
+const server = require('net').createServer(aedes.handle)
+```
+
+## aedes.subscribe (topic, deliverfunc, callback)
+
+- topic: `<string>`
+- deliverfunc: `<Function>` `(packet, cb) => void`
+  - packet: `<aedes-packet>` & [`PUBLISH`][PUBLISH]
+  - cb: `<Function>`
+- callback: `<Function>`
+
+Directly subscribe a `topic` in server side. Bypass [`authorizeSubscribe`](#handler-authorizesubscribe-client-subscription-callback)
+
+The `topic` and `deliverfunc` is a compound key to differentiate the uniqueness of its subscription pool. `topic` could be the one that is existed, in this case `deliverfunc` will be invoked as well as [`SUBSCRIBE`][SUBSCRIBE] does.
+
+`deliverfunc` supports backpressue.
+
+In aedes internal, `deliverfunc` is a function that delivers messages to subscribed clients.
+
+> _Note! `packet` belongs `aedes-packet` type. Some properties belongs to aedes internal, any changes on them will break aedes internal flow._
+
+In general you would find most properities in `packet` is same as what the incoming [`PUBLISH`][PUBLISH] is. For sure `cmd` property in `packet` structure in `deliverfunc` must be `publish`.
+
+> _Note! it requires `deliverfunc` to call `cb` before the function returns, otherwise some subscribed clients with  same `topic` will not receive messages._
+
+`callback` is invoked when server successfully registers the subscription.
+
+## aedes.unsubscribe (topic, deliverfunc, callback)
+
+Reverse of [aedes.subscribe](#aedessubscribe-topic-deliverfunc-callback).
+
+> _Note! the `deliverfunc` should be same as when `aedes.subscribe` does, otherwise the unsubscription will fail._
+
+## aedes.publish (packet, callback)
+
+- `packet` `<object>` [`PUBLISH`][PUBLISH]
+- `callback` `<Function>` `(error) => void`
+  - error `<Error>` | `null`
+
+Directly deliver `packet` on behalf of server to subscribed clients. Bypass [`authorizePublish`](#handler-authorizepublish-client-packet-callback).
+
+`callback` will be invoked with `error` arugments after finish.
+
+## aedes.close ([callback])
+
+- callback: `<Function>`
+
+Close aedes server and disconnects all clients.
+
+`callback` will be invoked when server is closed.
+
+## Handler: preConnect (client, packet, callback)
+
+- client: [`<Client>`](./Client.md)
+- packet: `<object>` [`CONNECT`][CONNECT]
+- callback: `<Function>` `(error, successful) => void`
+  - error `<Error>` | `null`
+  - successful `<boolean>`
+
+Invoked when server receives a valid [`CONNECT`][CONNECT] packet. The packet can be modified.
+
+`client` object is in default state. If invoked `callback` with no errors and `successful` be `true`, server will continue to establish a session.
+
+Any `error` will be raised in `connectionError` event.
+
+Some Use Cases:
+
+1. Rate Limit / Throttle by `client.conn.remoteAddress`
+2. Check `aedes.connectedClient` to limit maximum connections
+3. IP blacklisting
+
+```js
+aedes.preConnect = function(client, packet, callback) {
+  callback(null, client.conn.remoteAddress === '::1') {
+}
+```
+
+```js
+aedes.preConnect = function(client, packet, callback) {
+  callback(new Error('connection error'), client.conn.remoteAddress !== '::1') {
+}
+```
+
+## Handler: authenticate (client, username, password, callback)
+
+- client: [`<Client>`](./Client.md)
+- username: `<string>`
+- password: `<Buffer>`
+- callback: `<Function>` `(error, successful) => void`
+  - error `<Error>` | `null`
+  - successful `<boolean>`
+
+Invoked after `preConnect`.
+
+Server parses the [`CONNECT`][CONNECT] packet, initializes `client` object which set `client.id` to match the one in [`CONNECT`][CONNECT] packet and extract `username` and `password` as parameters for user-defined authentication flow.
+
+If invoked `callback` with no errors and `successful` be `true`, server authenticates `client` and continues to setup the client session.
+
+If authenticated, server acknowledges a [`CONNACK`][CONNACK] with `returnCode=0`, otherwise `returnCode=5`. Users could define the value between `2` and `5` by defining a `returnCode` property in `error` object.
+
+```js
+aedes.authenticate = function (client, username, password, callback) {
+  callback(null, username === 'matteo')
+}
+```
+
+```js
+aedes.authenticate = function (client, username, password, callback) {
+  var error = new Error('Auth error')
+  error.returnCode = 4
+  callback(error, null)
+}
+```
+
+Please refer to [Connect Return Code](http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html#_Table_3.1_-) to see their meanings.
+
+## Handler: authorizePublish (client, packet, callback)
+
+- client: [`<Client>`](./Client.md) | `null`
+- packet: `<object>` [`PUBLISH`][PUBLISH]
+- callback: `<Function>` `(error) => void`
+  - error `<Error>` | `null`
+
+Invoked when
+
+1. publish LWT to all online clients
+2. incoming client publish
+
+`client` is `null` when aedes publishes obsolete LWT without connected clients
+
+If invoked `callback` with no errors, server authorizes the packet otherwise emits `clientError` with `error`. If an `error` occurs the client connection will be closed, but no error is returned to the client (MQTT-3.3.5-2)
+
+```js
+aedes.authorizePublish = function (client, packet, callback) {
+  if (packet.topic === 'aaaa') {
+    return callback(new Error('wrong topic'))
+  }
+  if (packet.topic === 'bbb') {
+    packet.payload = Buffer.from('overwrite packet payload')
+  }
+  callback(null)
+}
+```
+
+By default `authorizePublish` throws error in case a client publish to topics with `$SYS/` prefix to prevent possible DoS (see [#597](https://github.com/moscajs/aedes/issues/597)). If you write your own implementation of `authorizePublish` we suggest you to add a check for this. Default implementation:
+
+```js
+function defaultAuthorizePublish (client, packet, callback) {
+  if (packet.topic.startsWith($SYS_PREFIX)) {
+    return callback(new Error($SYS_PREFIX + ' topic is reserved'))
+  }
+  callback(null)
+}
+```
+
+## Handler: authorizeSubscribe (client, subscription, callback)
+
+- client: [`<Client>`](./Client.md)
+- subscription: `<object>`
+- callback: `<Function>` `(error) => void`
+  - error `<Error>` | `null`
+  - subscription: `<object>` | `null`
+
+Invoked when
+
+1. restore subscriptions in non-clean session.
+2. incoming client [`SUBSCRIBE`][SUBSCRIBE]
+
+`subscription` is a dictionary object like `{ topic: hello, qos: 0 }`.
+
+If invoked `callback` with no errors, server authorizes the packet otherwise emits `clientError` with `error`.
+
+In general user should not touch the `subscription` and pass to callback, but server gives an option to change the subscription on-the-fly.
+
+```js
+aedes.authorizeSubscribe = function (client, sub, callback) {
+  if (sub.topic === 'aaaa') {
+    return callback(new Error('wrong topic'))
+  }
+  if (sub.topic === 'bbb') {
+    // overwrites subscription
+    sub.topic = 'foo'
+    sub.qos = 1
+  }
+  callback(null, sub)
+}
+```
+
+To negate a subscription, set the subscription to `null`. Aedes ignores the negated subscription and the `qos` in `SubAck` is set to `128` based on [MQTT 3.11 spec](https://docs.oasis-open.org/mqtt/mqtt/v3.1.1/mqtt-v3.1.1.html#_Toc385349323):
+
+```js
+aedes.authorizeSubscribe = function (client, sub, callback) {
+  // prohibited to subscribe 'aaaa' and suppress error
+  callback(null, sub.topic === 'aaaa' ? null : sub)
+}
+```
+
+## Handler: authorizeForward (client, packet)
+
+- client: [`<Client>`](./Client.md)
+- packet: `<aedes-packet>` & [`PUBLISH`][PUBLISH]
+- Returns: `<aedes-packet>` | `null`
+
+Invoked when
+
+1. aedes sends retained messages when client reconnects
+2. aedes pre-delivers subscribed message to clients
+
+Return `null` will not forward `packet` to clients.
+
+In general user should not touch the `packet` and return it what it is, but server gives an option to change the `packet` on-the-fly and forward it to clients.
+
+> _Note! `packet` belongs `aedes-packet` type. Some properties belongs to aedes internal, any changes on them will break aedes internal flow._
+
+```js
+aedes.authorizeForward = function (client, packet) {
+  if (packet.topic === 'aaaa' && client.id === "I should not see this") {
+    return
+  }
+  if (packet.topic === 'bbb') {
+    packet.payload = new Buffer('overwrite packet payload')
+  }
+  return packet
+}
+```
+
+## Handler: published (packet, client, callback)
+
+- packet: `<aedes-packet>` & [`PUBLISH`][PUBLISH]
+- client: [`<Client>`](./Client.md)
+- callback: `<Function>`
+
+same as [`Event: publish`](#event-publish), but provides a backpressure functionality. TLDR; If you are doing operations on packets that MUST require finishing operations on a packet before handling the next one use this otherwise, expecially for long running operations, you should use [`Event: publish`](#event-publish) instead.
+
+[CONNECT]: https://github.com/mqttjs/mqtt-packet#connect
+[CONNACK]: https://github.com/mqttjs/mqtt-packet#connack
+[SUBSCRIBE]: https://github.com/mqttjs/mqtt-packet#subscribe
+[PINGREQ]: https://github.com/mqttjs/mqtt-packet#pingreq
+[PUBLISH]: https://github.com/mqttjs/mqtt-packet#publish
+[PUBREL]: https://github.com/mqttjs/mqtt-packet#pubrel
diff --git a/mqtt-backend/node_modules/aedes/docs/Client.md b/mqtt-backend/node_modules/aedes/docs/Client.md
new file mode 100644
index 0000000..a0c11c2
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/docs/Client.md
@@ -0,0 +1,156 @@
+<!-- markdownlint-disable MD013 MD024 -->
+# Client
+
+- [Client](#client)
+  - [new Client(aedes, stream, request)](#new-clientaedes-stream-request)
+  - [client.conn](#clientconn)
+  - [client.req](#clientreq)
+  - [client.connecting](#clientconnecting)
+  - [client.connected](#clientconnected)
+  - [client.closed](#clientclosed)
+  - [client.id](#clientid)
+  - [client.clean](#clientclean)
+  - [client.version](#clientversion)
+  - [Event: connected](#event-connected)
+  - [Event: error](#event-error)
+  - [client.publish (packet, [callback])](#clientpublish-packet-callback)
+  - [client.subscribe (subscriptions, [callback])](#clientsubscribe-subscriptions-callback)
+  - [client.unsubscribe (unsubscriptions, [callback])](#clientunsubscribe-unsubscriptions-callback)
+  - [client.close ([callback])](#clientclose-callback)
+  - [client.emptyOutgoingQueue ([callback])](#clientemptyoutgoingqueue-callback)
+
+## new Client(aedes, stream, request)
+
+- aedes [`<Aedes>`](./Aedes.md)
+- stream: `<net.Socket>` | `<stream.Duplex>`
+- request: `<http.IncomingMessage>`
+- Returns: `<Client>`
+
+## client.conn
+
+- `<net.Socket>` | `<stream.Duplex>`
+
+Client connection stream object.
+
+In the case of `net.createServer`, `conn` passed to the `connectionlistener` function by node's [net.createServer](https://nodejs.org/api/net.html#net_net_createserver_options_connectionlistener) API.
+
+In the case of [`websocket-stream`][websocket-stream], it's the `stream` argument passed to the websocket `handle` function in [`websocket-stream #on-the-server`][websocket-stream-doc-on-the-server]].
+
+## client.req
+
+- `<http.IncomingMessage>`
+
+only for [`websocket-stream`][websocket-stream]. It is a HTTP Websocket upgrade request object passed to websocket `handle` function in [`websocket-stream #on-the-server`][websocket-stream-doc-on-the-server]. It gives an option for accessing headers or cookies.
+
+## client.connecting
+
+- `<boolean>` __Default__: `false`
+
+a read-only flag, it is true when Client is in CONNECT phase. Aedes emits `connackSent` event will not reset `connecting` to `false` until it received all its offline messagess to the Client.
+
+## client.connected
+
+- `<boolean>` __Default__: `false`
+
+a read-only flag, it is `true` when `connected` event is emitted, and `false` when client is closed.
+
+## client.closed
+
+- `<boolean>` __Default__: `false`
+
+a read-only flag indicates if client is closed or not.
+
+## client.id
+
+- `<string>` __Default__: `aedes_${hyperid()}`
+
+Client unique identifier, specified by CONNECT packet.
+
+It is available only after `CONNACK (rc=0)`, otherwise it is `null` in cases:
+
+- in [`aedes.preConnect`](./Aedes.md#handler-preconnect-client-callback) stage
+- after `CONNACK (rc!=0)` response
+- `connectionError` raised by aedes
+
+## client.clean
+
+- `<boolean>` __Default__: `true`
+
+Client clean flag, set by clean flag in `CONNECT` packet.
+
+## client.version
+
+- `<number>` __Default__: `null`
+
+Client version, set by protocol version in `CONNECT` packet when `CONNACK (rc=0)` returns.
+
+## Event: connected
+
+Same as aedes [`clientReady`](./Aedes.md#event-clientready) but in client-wise.
+
+## Event: error
+
+- `error` `<Error>`
+
+Emitted when an error occurs.
+
+## client.publish (packet, [callback])
+
+- `packet` `<object>` [`PUBLISH`][PUBLISH]
+- `callback` `<Function>` `(error) => void`
+  - error `<Error>` | `null`
+
+Publish the given `packet` to this client. QoS 1 and 2 are fully supported, while the retained flag is not.
+
+`callback`  will be invoked when the message has been sent, but not acked.
+
+## client.subscribe (subscriptions, [callback])
+
+- `subscriptions` `<object>`
+- `callback` `<Function>` `(error) => void`
+  - error `<Error>` | `null`
+
+Subscribe client to the list of topics.
+
+`subscriptions` can be:
+
+1. a single object in the format `{ topic: topic, qos: qos }`
+2. an array of the above
+3. a full [`SUBSCRIBE`][SUBSCRIBE], specifying a `messageId` will send suback to the client.
+
+`callback`  will be invoked when the subscription is completed.
+
+## client.unsubscribe (unsubscriptions, [callback])
+
+- `unsubscriptions` `<object>`
+- `callback` `<Function>` `(error) => void`
+  - error `<Error>` | `null`
+
+Unsubscribe client to the list of topics.
+
+`unsubscriptions` can be:
+
+1. a single object in the format `{ topic: topic, qos: qos }`
+2. an array of the above
+3. a full [`UNSUBSCRIBE`][UNSUBSCRIBE]
+
+`callback`  will be invoked when the unsubscriptions are completed.
+
+## client.close ([callback])
+
+Disconnect client
+
+`callback` will be invoked when client is closed.
+
+## client.emptyOutgoingQueue ([callback])
+
+Clear all outgoing messages (QoS > 1) related to this client from persistence
+
+`callback` will be invoked when the operation ends.
+
+[PUBLISH]: https://github.com/mqttjs/mqtt-packet#publish
+[SUBSCRIBE]: https://github.com/mqttjs/mqtt-packet#subscribe
+[UNSUBSCRIBE]: https://github.com/mqttjs/mqtt-packet#unsubscribe
+
+[websocket-stream]: https://www.npmjs.com/websocket-stream
+[websocket-stream-doc-on-the-server]: https://github.com/maxogden/websocket-stream/blob/master/readme.md#on-the-server
diff --git a/mqtt-backend/node_modules/aedes/docs/Examples.md b/mqtt-backend/node_modules/aedes/docs/Examples.md
new file mode 100644
index 0000000..808888a
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/docs/Examples.md
@@ -0,0 +1,111 @@
+<!-- markdownlint-disable MD013 MD024 -->
+# Examples
+
+## Simple plain MQTT server
+
+```js
+const aedes = require('aedes')()
+const server = require('net').createServer(aedes.handle)
+const port = 1883
+
+server.listen(port, function () {
+  console.log('server started and listening on port ', port)
+})
+```
+
+## Typescript
+
+```ts
+import Aedes from 'aedes'
+import { createServer } from 'net'
+
+const port = 1883
+
+const aedes = new Aedes()
+const server = createServer(aedes.handle)
+
+server.listen(port, function () {
+  console.log('server started and listening on port ', port)
+})
+```
+
+## Simple plain MQTT server using server-factory
+
+```js
+const aedes = require('aedes')()
+const { createServer } = require('aedes-server-factory')
+const port = 1883
+
+const server = createServer(aedes)
+
+server.listen(port, function () {
+  console.log('server started and listening on port ', port)
+})
+```
+
+## MQTT over TLS / MQTTS
+
+```js
+const fs = require('fs')
+const aedes = require('aedes')()
+const port = 8883
+
+const options = {
+  key: fs.readFileSync('YOUR_PRIVATE_KEY_FILE.pem'),
+  cert: fs.readFileSync('YOUR_PUBLIC_CERT_FILE.pem')
+}
+
+const server = require('tls').createServer(options, aedes.handle)
+
+server.listen(port, function () {
+  console.log('server started and listening on port ', port)
+})
+```
+
+## MQTT server over WebSocket
+
+```js
+const aedes = require('aedes')()
+const httpServer = require('http').createServer()
+const ws = require('websocket-stream')
+const port = 8888
+
+ws.createServer({ server: httpServer }, aedes.handle)
+
+httpServer.listen(port, function () {
+  console.log('websocket server listening on port ', port)
+})
+```
+
+## MQTT server over WebSocket using server-factory
+
+```js
+const aedes = require('aedes')()
+const { createServer } = require('aedes-server-factory')
+const port = 8888
+
+const httpServer = createServer(aedes, { ws: true })
+
+httpServer.listen(port, function () {
+  console.log('websocket server listening on port ', port)
+})
+```
+
+## Clusters
+
+In order to use Aedes in clusters you have to choose a persistence and an mqemitter that supports clusters. Tested persistence/mqemitters that works with clusters are:
+
+- [mqemitter-redis]
+- [mqemitter-child-process]
+- [mqemitter-mongodb]
+- [aedes-persistence-mongodb]
+- [aedes-persistence-redis]
+
+[This](https://github.com/moscajs/aedes/blob/master/examples/clusters/index.js) is an example using [mqemitter-mongodb] and [aedes-persistence-mongodb]
+
+[aedes-persistence-mongodb]: https://www.npmjs.com/aedes-persistence-mongodb
+[aedes-persistence-redis]: https://www.npmjs.com/aedes-persistence-redis
+
+[mqemitter-redis]: https://www.npmjs.com/mqemitter-redis
+[mqemitter-mongodb]: https://www.npmjs.com/mqemitter-mongodb
+[mqemitter-child-process]: https://www.npmjs.com/mqemitter-child-process
diff --git a/mqtt-backend/node_modules/aedes/example.js b/mqtt-backend/node_modules/aedes/example.js
new file mode 100644
index 0000000..2ab5144
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/example.js
@@ -0,0 +1,44 @@
+'use strict'
+
+const aedes = require('./aedes')()
+const server = require('net').createServer(aedes.handle)
+const httpServer = require('http').createServer()
+const ws = require('websocket-stream')
+const port = 1883
+const wsPort = 8888
+
+server.listen(port, function () {
+  console.log('server listening on port', port)
+})
+
+ws.createServer({
+  server: httpServer
+}, aedes.handle)
+
+httpServer.listen(wsPort, function () {
+  console.log('websocket server listening on port', wsPort)
+})
+
+aedes.on('clientError', function (client, err) {
+  console.log('client error', client.id, err.message, err.stack)
+})
+
+aedes.on('connectionError', function (client, err) {
+  console.log('client error', client, err.message, err.stack)
+})
+
+aedes.on('publish', function (packet, client) {
+  if (client) {
+    console.log('message from client', client.id)
+  }
+})
+
+aedes.on('subscribe', function (subscriptions, client) {
+  if (client) {
+    console.log('subscribe from client', subscriptions, client.id)
+  }
+})
+
+aedes.on('client', function (client) {
+  console.log('new client', client.id)
+})
diff --git a/mqtt-backend/node_modules/aedes/examples/clusters/index.js b/mqtt-backend/node_modules/aedes/examples/clusters/index.js
new file mode 100644
index 0000000..72e07e2
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/examples/clusters/index.js
@@ -0,0 +1,87 @@
+const cluster = require('cluster')
+const Aedes = require('aedes')
+const { createServer } = require('net')
+const { cpus } = require('os')
+const MONGO_URL = 'mongodb://127.0.0.1/aedes-clusters'
+
+const mq = process.env.MQ === 'redis'
+  ? require('mqemitter-redis')({
+    port: process.env.REDIS_PORT || 6379
+  })
+  : require('mqemitter-mongodb')({
+    url: MONGO_URL
+  })
+
+const persistence = process.env.PERSISTENCE === 'redis'
+  ? require('aedes-persistence-redis')({
+    port: process.env.REDIS_PORT || 6379
+  })
+  : require('aedes-persistence-mongodb')({
+    url: MONGO_URL
+  })
+
+function startAedes () {
+  const port = 1883
+
+  const aedes = Aedes({
+    id: 'BROKER_' + cluster.worker.id,
+    mq,
+    persistence
+  })
+
+  const server = createServer(aedes.handle)
+
+  server.listen(port, '0.0.0.0', function () {
+    console.log('Aedes listening on port:', port)
+    aedes.publish({ topic: 'aedes/hello', payload: "I'm broker " + aedes.id })
+  })
+
+  server.on('error', function (err) {
+    console.log('Server error', err)
+    process.exit(1)
+  })
+
+  aedes.on('subscribe', function (subscriptions, client) {
+    console.log('MQTT client \x1b[32m' + (client ? client.id : client) +
+            '\x1b[0m subscribed to topics: ' + subscriptions.map(s => s.topic).join('\n'), 'from broker', aedes.id)
+  })
+
+  aedes.on('unsubscribe', function (subscriptions, client) {
+    console.log('MQTT client \x1b[32m' + (client ? client.id : client) +
+            '\x1b[0m unsubscribed to topics: ' + subscriptions.join('\n'), 'from broker', aedes.id)
+  })
+
+  // fired when a client connects
+  aedes.on('client', function (client) {
+    console.log('Client Connected: \x1b[33m' + (client ? client.id : client) + '\x1b[0m', 'to broker', aedes.id)
+  })
+
+  // fired when a client disconnects
+  aedes.on('clientDisconnect', function (client) {
+    console.log('Client Disconnected: \x1b[31m' + (client ? client.id : client) + '\x1b[0m', 'to broker', aedes.id)
+  })
+
+  // fired when a message is published
+  aedes.on('publish', async function (packet, client) {
+    console.log('Client \x1b[31m' + (client ? client.id : 'BROKER_' + aedes.id) + '\x1b[0m has published', packet.payload.toString(), 'on', packet.topic, 'to broker', aedes.id)
+  })
+}
+
+if (cluster.isMaster) {
+  const numWorkers = cpus().length
+  for (let i = 0; i < numWorkers; i++) {
+    cluster.fork()
+  }
+
+  cluster.on('online', function (worker) {
+    console.log('Worker ' + worker.process.pid + ' is online')
+  })
+
+  cluster.on('exit', function (worker, code, signal) {
+    console.log('Worker ' + worker.process.pid + ' died with code: ' + code + ', and signal: ' + signal)
+    console.log('Starting a new worker')
+    cluster.fork()
+  })
+} else {
+  startAedes()
+}
diff --git a/mqtt-backend/node_modules/aedes/examples/clusters/package.json b/mqtt-backend/node_modules/aedes/examples/clusters/package.json
new file mode 100644
index 0000000..6a5dd09
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/examples/clusters/package.json
@@ -0,0 +1,18 @@
+{
+  "name": "aedes_clusters",
+  "version": "1.0.0",
+  "description": "Testing Aedes Broker with clusters",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "robertsLando",
+  "license": "MIT",
+  "dependencies": {
+    "aedes": "^0.48.1",
+    "aedes-persistence-mongodb": "^9.1.0",
+    "aedes-persistence-redis": "^9.0.1",
+    "mqemitter-mongodb": "^8.1.0",
+    "mqemitter-redis": "^5.0.0"
+  }
+}
diff --git a/mqtt-backend/node_modules/aedes/lib/client.js b/mqtt-backend/node_modules/aedes/lib/client.js
new file mode 100644
index 0000000..e5ee42d
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/client.js
@@ -0,0 +1,399 @@
+'use strict'
+
+const mqtt = require('mqtt-packet')
+const EventEmitter = require('events')
+const util = require('util')
+const eos = require('end-of-stream')
+const Packet = require('aedes-packet')
+const write = require('./write')
+const QoSPacket = require('./qos-packet')
+const handleSubscribe = require('./handlers/subscribe')
+const handleUnsubscribe = require('./handlers/unsubscribe')
+const handle = require('./handlers')
+const { pipeline } = require('stream')
+const { through } = require('./utils')
+
+module.exports = Client
+
+function Client (broker, conn, req) {
+  const that = this
+
+  // metadata
+  this.closed = false
+  this.connecting = false
+  this.connected = false
+  this.connackSent = false
+  this.errored = false
+
+  // mqtt params
+  this.id = null
+  this.clean = true
+  this.version = null
+
+  this.subscriptions = {}
+  this.duplicates = {}
+
+  this.broker = broker
+  this.conn = conn
+  conn.client = this
+
+  this._disconnected = false
+  this._authorized = false
+  this._parsingBatch = 1
+  this._nextId = Math.ceil(Math.random() * 65535)
+
+  this.req = req
+  this.connDetails = req ? req.connDetails : null
+
+  // we use two variables for the will
+  // because we store in _will while
+  // we are authenticating
+  this.will = null
+  this._will = null
+
+  this._parser = mqtt.parser()
+  this._parser.client = this
+  this._parser._queue = [] // queue packets received before client fires 'connect' event. Prevents memory leaks on 'connect' event
+  this._parser.on('packet', enqueue)
+  this.once('connected', dequeue)
+
+  function nextBatch (err) {
+    if (err) {
+      that.emit('error', err)
+      return
+    }
+
+    const client = that
+
+    if (client._paused) {
+      return
+    }
+
+    that._parsingBatch--
+    if (that._parsingBatch <= 0) {
+      that._parsingBatch = 0
+      const buf = client.conn.read(null)
+      if (buf) {
+        client._parser.parse(buf)
+      }
+    }
+  }
+  this._nextBatch = nextBatch
+
+  conn.on('readable', nextBatch)
+
+  this.on('error', onError)
+  conn.on('error', this.emit.bind(this, 'error'))
+  this._parser.on('error', this.emit.bind(this, 'error'))
+
+  conn.on('end', this.close.bind(this))
+  this._eos = eos(this.conn, this.close.bind(this))
+
+  const getToForwardPacket = (_packet) => {
+    // Mqttv5 3.8.3.1: https://docs.oasis-open.org/mqtt/mqtt/v5.0/mqtt-v5.0.html#_Toc3901169
+    // prevent to forward messages sent by the same client when no-local flag is set
+    if (_packet.clientId === that.id && _packet.nl) return
+
+    const toForward = dedupe(that, _packet) &&
+      that.broker.authorizeForward(that, _packet)
+
+    return toForward
+  }
+
+  this.deliver0 = function deliverQoS0 (_packet, cb) {
+    const toForward = getToForwardPacket(_packet)
+
+    if (toForward) {
+      // Give nodejs some time to clear stacks, or we will see
+      // "Maximum call stack size exceeded" in a very high load
+      setImmediate(() => {
+        const packet = new Packet(toForward, broker)
+        packet.qos = 0
+        write(that, packet, function (err) {
+          that._onError(err)
+          cb() // don't pass the error here or it will be thrown by mqemitter
+        })
+      })
+    } else {
+      setImmediate(cb)
+    }
+  }
+
+  this.deliverQoS = function deliverQoS (_packet, cb) {
+    // downgrade to qos0 if requested by publish
+    if (_packet.qos === 0) {
+      that.deliver0(_packet, cb)
+      return
+    }
+    const toForward = getToForwardPacket(_packet)
+
+    if (toForward) {
+      setImmediate(() => {
+        const packet = new QoSPacket(toForward, that)
+        // Downgrading to client subscription qos if needed
+        const clientSub = that.subscriptions[packet.topic]
+        if (clientSub && (clientSub.qos || 0) < packet.qos) {
+          packet.qos = clientSub.qos
+        }
+        packet.writeCallback = cb
+        if (that.clean || packet.retain) {
+          writeQoS(null, that, packet)
+        } else {
+          broker.persistence.outgoingUpdate(that, packet, writeQoS)
+        }
+      })
+    } else if (that.clean === false) {
+      that.broker.persistence.outgoingClearMessageId(that, _packet, noop)
+      // we consider this to be an error, since the packet is undefined
+      // so there's nothing to send
+      setImmediate(cb)
+    } else {
+      setImmediate(cb)
+    }
+  }
+
+  this._keepaliveTimer = null
+  this._keepaliveInterval = -1
+
+  this._connectTimer = setTimeout(function () {
+    that.emit('error', new Error('connect did not arrive in time'))
+  }, broker.connectTimeout)
+}
+
+function dedupe (client, packet) {
+  const id = packet.brokerId
+  if (!id) {
+    return true
+  }
+  const duplicates = client.duplicates
+  const counter = packet.brokerCounter
+  const result = (duplicates[id] || 0) < counter
+  if (result) {
+    duplicates[id] = counter
+  }
+  return result
+}
+
+function writeQoS (err, client, packet) {
+  if (err) {
+    // is this right, or we should ignore thins?
+    client.emit('error', err)
+    // don't pass the error here or it will be thrown by mqemitter
+    packet.writeCallback()
+  } else {
+    write(client, packet, function (err) {
+      if (err) {
+        client.emit('error', err)
+      }
+      // don't pass the error here or it will be thrown by mqemitter
+      packet.writeCallback()
+    })
+  }
+}
+
+function drainRequest (req) {
+  req.callback()
+}
+
+function onError (err) {
+  if (!err) return
+
+  this.errored = true
+  this.conn.removeAllListeners('error')
+  this.conn.on('error', noop)
+  // hack to clean up the write callbacks in case of error
+  const state = this.conn._writableState
+  const list = typeof state.getBuffer === 'function' ? state.getBuffer() : state.buffer
+  list.forEach(drainRequest)
+  this.broker.emit(this.id ? 'clientError' : 'connectionError', this, err)
+  this.close()
+}
+
+util.inherits(Client, EventEmitter)
+
+Client.prototype._onError = onError
+
+Client.prototype.publish = function (message, done) {
+  const packet = new Packet(message, this.broker)
+  const that = this
+  if (packet.qos === 0) {
+    // skip offline and send it as it is
+    this.deliver0(packet, done)
+    return
+  }
+  if (!this.clean && this.id) {
+    this.broker.persistence.outgoingEnqueue({
+      clientId: this.id
+    }, packet, function deliver (err) {
+      if (err) {
+        return done(err)
+      }
+      that.deliverQoS(packet, done)
+    })
+  } else {
+    that.deliverQoS(packet, done)
+  }
+}
+
+Client.prototype.subscribe = function (packet, done) {
+  if (!packet.subscriptions) {
+    if (!Array.isArray(packet)) {
+      packet = [packet]
+    }
+    packet = {
+      subscriptions: packet
+    }
+  }
+  handleSubscribe(this, packet, false, done)
+}
+
+Client.prototype.unsubscribe = function (packet, done) {
+  if (!packet.unsubscriptions) {
+    if (!Array.isArray(packet)) {
+      packet = [packet]
+    }
+    packet = {
+      unsubscriptions: packet
+    }
+  }
+  handleUnsubscribe(this, packet, done)
+}
+
+Client.prototype.close = function (done) {
+  if (this.closed) {
+    if (typeof done === 'function') {
+      done()
+    }
+    return
+  }
+
+  const that = this
+  const conn = this.conn
+
+  this.closed = true
+
+  this._parser.removeAllListeners('packet')
+  conn.removeAllListeners('readable')
+
+  this._parser._queue = null
+
+  if (this._keepaliveTimer) {
+    this._keepaliveTimer.clear()
+    this._keepaliveInterval = -1
+    this._keepaliveTimer = null
+  }
+
+  if (this._connectTimer) {
+    clearTimeout(this._connectTimer)
+    this._connectTimer = null
+  }
+
+  this._eos()
+  this._eos = noop
+
+  handleUnsubscribe(
+    this,
+    {
+      unsubscriptions: Object.keys(this.subscriptions)
+    },
+    finish)
+
+  function finish () {
+    const will = that.will
+    // _disconnected is set only if client is disconnected with a valid disconnect packet
+    if (!that._disconnected && will) {
+      that.broker.authorizePublish(that, will, function (err) {
+        if (err) { return done() }
+        that.broker.publish(will, that, done)
+
+        function done () {
+          that.broker.persistence.delWill({
+            id: that.id,
+            brokerId: that.broker.id
+          }, noop)
+        }
+      })
+    } else if (will) {
+      // delete the persisted will even on clean disconnect https://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html#_Toc385349232
+      that.broker.persistence.delWill({
+        id: that.id,
+        brokerId: that.broker.id
+      }, noop)
+    }
+
+    that.will = null // this function might be called twice
+    that._will = null
+
+    that.connected = false
+    that.connecting = false
+
+    conn.removeAllListeners('error')
+    conn.on('error', noop)
+
+    if (that.broker.clients[that.id] && that._authorized) {
+      that.broker.unregisterClient(that)
+    }
+
+    // clear up the drain event listeners
+    that.conn.emit('drain')
+    that.conn.removeAllListeners('drain')
+
+    conn.destroy()
+
+    if (typeof done === 'function') {
+      done()
+    }
+  }
+}
+
+Client.prototype.pause = function () {
+  this._paused = true
+}
+
+Client.prototype.resume = function () {
+  this._paused = false
+  this._nextBatch()
+}
+
+function enqueue (packet) {
+  const client = this.client
+  client._parsingBatch++
+  // already connected or it's the first packet
+  if (client.connackSent || client._parsingBatch === 1) {
+    handle(client, packet, client._nextBatch)
+  } else {
+    if (this._queue.length < client.broker.queueLimit) {
+      this._queue.push(packet)
+    } else {
+      this.emit('error', new Error('Client queue limit reached'))
+    }
+  }
+}
+
+function dequeue () {
+  const q = this._parser._queue
+  if (q) {
+    for (let i = 0, len = q.length; i < len; i++) {
+      handle(this, q[i], this._nextBatch)
+    }
+
+    this._parser._queue = null
+  }
+}
+
+Client.prototype.emptyOutgoingQueue = function (done) {
+  const client = this
+  const persistence = client.broker.persistence
+
+  function filter (packet, enc, next) {
+    persistence.outgoingClearMessageId(client, packet, next)
+  }
+
+  pipeline(
+    persistence.outgoingStream(client),
+    through(filter),
+    done
+  )
+}
+
+function noop () {}
diff --git a/mqtt-backend/node_modules/aedes/lib/handlers/connect.js b/mqtt-backend/node_modules/aedes/lib/handlers/connect.js
new file mode 100644
index 0000000..43011d2
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/handlers/connect.js
@@ -0,0 +1,272 @@
+'use strict'
+
+const retimer = require('retimer')
+const { pipeline } = require('stream')
+const write = require('../write')
+const QoSPacket = require('../qos-packet')
+const { through } = require('../utils')
+const handleSubscribe = require('./subscribe')
+const uniqueId = require('hyperid')()
+
+function Connack (arg) {
+  this.cmd = 'connack'
+  this.returnCode = arg.returnCode
+  this.sessionPresent = arg.sessionPresent
+}
+
+function ClientPacketStatus (client, packet) {
+  this.client = client
+  this.packet = packet
+}
+
+const connectActions = [
+  authenticate,
+  setKeepAlive,
+  fetchSubs,
+  restoreSubs,
+  storeWill,
+  registerClient,
+  doConnack,
+  emptyQueue
+]
+
+const errorMessages = [
+  '',
+  'unacceptable protocol version',
+  'identifier rejected',
+  'Server unavailable',
+  'bad user name or password',
+  'not authorized',
+  'keep alive limit exceeded'
+]
+
+function handleConnect (client, packet, done) {
+  clearTimeout(client._connectTimer)
+  client._connectTimer = null
+  client.connecting = true
+  client.broker.preConnect(client, packet, negate)
+
+  function negate (err, successful) {
+    if (!err && successful === true) {
+      setImmediate(init, client, packet, done)
+    } else {
+      client.connecting = false
+      done(err)
+    }
+  }
+}
+
+function init (client, packet, done) {
+  const clientId = packet.clientId
+  let returnCode = 0
+  // [MQTT-3.1.2-2]
+  if (packet.protocolVersion < 3 || packet.protocolVersion > 4) {
+    returnCode = 1
+  }
+  // MQTT 3.1.0 allows <= 23 client id length
+  if (packet.protocolVersion === 3 && clientId.length > client.broker.maxClientsIdLength) {
+    returnCode = 2
+  }
+  // check if the client keepalive is compatible with broker settings
+  if (client.broker.keepaliveLimit && (!packet.keepalive || packet.keepalive > client.broker.keepaliveLimit)) {
+    returnCode = 6
+  }
+  if (returnCode > 0) {
+    const error = new Error(errorMessages[returnCode])
+    error.errorCode = returnCode
+    doConnack(
+      { client, returnCode, sessionPresent: false },
+      done.bind(this, error))
+    return
+  }
+
+  client.id = clientId || 'aedes_' + uniqueId()
+  client.clean = packet.clean
+  client.version = packet.protocolVersion
+  client._will = packet.will
+
+  client.broker._series(
+    new ClientPacketStatus(client, packet),
+    connectActions,
+    { returnCode: 0, sessionPresent: false }, // [MQTT-3.1.4-4], [MQTT-3.2.2-4]
+    function (err) {
+      this.client.connecting = false
+      if (!err) {
+        this.client.connected = true
+        this.client.broker.emit('clientReady', client)
+        this.client.emit('connected')
+      }
+      done(err)
+    })
+}
+
+function authenticate (arg, done) {
+  const client = this.client
+  client.pause()
+  client.broker.authenticate(
+    client,
+    this.packet.username,
+    this.packet.password,
+    negate)
+
+  function negate (err, successful) {
+    if (client.closed || client.broker.closed) {
+      // a hack, sometimes client.close() or broker.close() happened
+      // before authenticate() comes back
+      // we stop here for not to register it and deregister it in write()
+      return
+    }
+    if (!err && successful) {
+      client._authorized = true
+      return done()
+    }
+
+    if (err) {
+      const errCode = err.returnCode
+      if (errCode && (errCode >= 2 && errCode <= 5)) {
+        arg.returnCode = errCode
+      } else {
+        arg.returnCode = 5
+      }
+      if (!err.message) {
+        err.message = errorMessages[arg.returnCode]
+      }
+    } else {
+      arg.returnCode = 5
+      err = new Error(errorMessages[arg.returnCode])
+    }
+    err.errorCode = arg.returnCode
+    arg.client = client
+    doConnack(arg,
+      // [MQTT-3.2.2-5]
+      client.close.bind(client, done.bind(this, err)))
+  }
+}
+
+function setKeepAlive (arg, done) {
+  if (this.packet.keepalive > 0) {
+    const client = this.client
+    // [MQTT-3.1.2-24]
+    client._keepaliveInterval = (this.packet.keepalive * 1500) + 1
+    client._keepaliveTimer = retimer(function keepaliveTimeout () {
+      client.broker.emit('keepaliveTimeout', client)
+      client.emit('error', new Error('keep alive timeout'))
+    }, client._keepaliveInterval)
+  }
+  done()
+}
+
+function fetchSubs (arg, done) {
+  const client = this.client
+  if (!this.packet.clean) {
+    client.broker.persistence.subscriptionsByClient({
+      id: client.id,
+      done,
+      arg
+    }, gotSubs)
+    return
+  }
+  arg.sessionPresent = false // [MQTT-3.2.2-1]
+  client.broker.persistence.cleanSubscriptions(
+    client,
+    done)
+}
+
+function gotSubs (err, subs, client) {
+  if (err) {
+    return client.done(err)
+  }
+  client.arg.subs = subs
+  client.done()
+}
+
+function restoreSubs (arg, done) {
+  if (arg.subs) {
+    handleSubscribe(this.client, { subscriptions: arg.subs }, true, done)
+    arg.sessionPresent = !!arg.subs // cast to boolean, [MQTT-3.2.2-2]
+    return
+  }
+  arg.sessionPresent = false // [MQTT-3.2.2-1], [MQTT-3.2.2-3]
+  done()
+}
+
+function storeWill (arg, done) {
+  const client = this.client
+  client.will = client._will
+  // delete any existing will messages from persistence
+  client.broker.persistence.delWill(client, function () {
+    if (client.will) {
+      client.broker.persistence.putWill(
+        client,
+        client.will,
+        done)
+    } else {
+      done()
+    }
+  })
+}
+
+function registerClient (arg, done) {
+  const client = this.client
+  client.broker.registerClient(client)
+  done()
+}
+
+function doConnack (arg, done) {
+  const client = arg.client || this.client
+  const connack = new Connack(arg)
+  write(client, connack, function (err) {
+    if (!err) {
+      client.broker.emit('connackSent', connack, client)
+      client.connackSent = true
+    }
+    done(err)
+  })
+}
+
+// push any queued messages (included retained messages) at the disconnected time
+// when QoS > 0 and session is true
+function emptyQueue (arg, done) {
+  const client = this.client
+  const persistence = client.broker.persistence
+  const outgoing = persistence.outgoingStream(client)
+
+  client.resume()
+
+  pipeline(
+    outgoing,
+    through(function clearQueue (data, enc, next) {
+      const packet = new QoSPacket(data, client)
+      // Here we are deliberatly passing only the error
+      // This is because there is no destination stream so the "client"
+      // Object filled the buffer up to the highWaterMark preventing stored messages
+      // being sent
+      packet.writeCallback = (error, _client) => next(error)
+      persistence.outgoingUpdate(client, packet, emptyQueueFilter)
+    }),
+    done
+  )
+}
+
+function emptyQueueFilter (err, client, packet) {
+  const next = packet.writeCallback
+
+  if (err) {
+    client.emit('error', err)
+    return next()
+  }
+
+  const authorized = (packet.cmd === 'publish')
+    ? client.broker.authorizeForward(client, packet)
+    : true
+
+  const persistence = client.broker.persistence
+
+  if (client.clean || !authorized) {
+    persistence.outgoingClearMessageId(client, packet, next)
+  } else {
+    write(client, packet, next)
+  }
+}
+
+module.exports = handleConnect
diff --git a/mqtt-backend/node_modules/aedes/lib/handlers/index.js b/mqtt-backend/node_modules/aedes/lib/handlers/index.js
new file mode 100644
index 0000000..a5dfaa8
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/handlers/index.js
@@ -0,0 +1,77 @@
+'use strict'
+
+const handleConnect = require('./connect')
+const handleSubscribe = require('./subscribe')
+const handleUnsubscribe = require('./unsubscribe')
+const handlePublish = require('./publish')
+const handlePuback = require('./puback')
+const handlePubrel = require('./pubrel')
+const handlePubrec = require('./pubrec')
+const handlePing = require('./ping')
+
+function handle (client, packet, done) {
+  if (packet.cmd === 'connect') {
+    if (client.connecting || client.connected) {
+      // [MQTT-3.1.0-2]
+      finish(client.conn, packet, done)
+      return
+    }
+    handleConnect(client, packet, done)
+    return
+  }
+
+  if (!client.connecting && !client.connected) {
+    // [MQTT-3.1.0-1]
+    finish(client.conn, packet, done)
+    return
+  }
+
+  switch (packet.cmd) {
+    case 'publish':
+      handlePublish(client, packet, done)
+      break
+    case 'subscribe':
+      handleSubscribe(client, packet, false, done)
+      break
+    case 'unsubscribe':
+      handleUnsubscribe(client, packet, done)
+      break
+    case 'pubcomp':
+    case 'puback':
+      handlePuback(client, packet, done)
+      break
+    case 'pubrel':
+      handlePubrel(client, packet, done)
+      break
+    case 'pubrec':
+      handlePubrec(client, packet, done)
+      break
+    case 'pingreq':
+      handlePing(client, packet, done)
+      break
+    case 'disconnect':
+      // [MQTT-3.14.4-3]
+      client._disconnected = true
+      // [MQTT-3.14.4-1] [MQTT-3.14.4-2]
+      client.conn.destroy()
+      done()
+      return
+    default:
+      client.conn.destroy()
+      done()
+      return
+  }
+
+  if (client._keepaliveInterval > 0) {
+    client._keepaliveTimer.reschedule(client._keepaliveInterval)
+  }
+}
+
+function finish (conn, packet, done) {
+  conn.destroy()
+  const error = new Error('Invalid protocol')
+  error.info = packet
+  done(error)
+}
+
+module.exports = handle
diff --git a/mqtt-backend/node_modules/aedes/lib/handlers/ping.js b/mqtt-backend/node_modules/aedes/lib/handlers/ping.js
new file mode 100644
index 0000000..a4c042c
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/handlers/ping.js
@@ -0,0 +1,13 @@
+'use strict'
+
+const write = require('../write')
+const pingResp = {
+  cmd: 'pingresp'
+}
+
+function handlePing (client, packet, done) {
+  client.broker.emit('ping', packet, client)
+  write(client, pingResp, done)
+}
+
+module.exports = handlePing
diff --git a/mqtt-backend/node_modules/aedes/lib/handlers/puback.js b/mqtt-backend/node_modules/aedes/lib/handlers/puback.js
new file mode 100644
index 0000000..e4b419c
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/handlers/puback.js
@@ -0,0 +1,11 @@
+'use strict'
+
+function handlePuback (client, packet, done) {
+  const persistence = client.broker.persistence
+  persistence.outgoingClearMessageId(client, packet, function (err, origPacket) {
+    client.broker.emit('ack', origPacket, client)
+    done(err)
+  })
+}
+
+module.exports = handlePuback
diff --git a/mqtt-backend/node_modules/aedes/lib/handlers/publish.js b/mqtt-backend/node_modules/aedes/lib/handlers/publish.js
new file mode 100644
index 0000000..e30c9db
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/handlers/publish.js
@@ -0,0 +1,65 @@
+'use strict'
+
+const write = require('../write')
+
+function PubAck (packet) {
+  this.cmd = 'puback'
+  this.messageId = packet.messageId
+}
+
+function PubRec (packet) {
+  this.cmd = 'pubrec'
+  this.messageId = packet.messageId
+}
+
+const publishActions = [
+  authorizePublish,
+  enqueuePublish
+]
+function handlePublish (client, packet, done) {
+  const topic = packet.topic
+  let err
+  if (topic.length === 0) {
+    err = new Error('empty topic not allowed in PUBLISH')
+    return done(err)
+  }
+  if (topic.indexOf('#') > -1) {
+    err = new Error('# is not allowed in PUBLISH')
+    return done(err)
+  }
+  if (topic.indexOf('+') > -1) {
+    err = new Error('+ is not allowed in PUBLISH')
+    return done(err)
+  }
+  client.broker._series(client, publishActions, packet, done)
+}
+
+function enqueuePublish (packet, done) {
+  const client = this
+
+  switch (packet.qos) {
+    case 2:
+      client.broker.persistence.incomingStorePacket(client, packet, function (err) {
+        if (err) { return done(err) }
+        write(client, new PubRec(packet), done)
+      })
+      break
+    case 1:
+      write(client, new PubAck(packet), function (err) {
+        if (err) { return done(err) }
+        client.broker.publish(packet, client, done)
+      })
+      break
+    case 0:
+      client.broker.publish(packet, client, done)
+      break
+    default:
+      // nothing to do
+  }
+}
+
+function authorizePublish (packet, done) {
+  this.broker.authorizePublish(this, packet, done)
+}
+
+module.exports = handlePublish
diff --git a/mqtt-backend/node_modules/aedes/lib/handlers/pubrec.js b/mqtt-backend/node_modules/aedes/lib/handlers/pubrec.js
new file mode 100644
index 0000000..5c914dd
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/handlers/pubrec.js
@@ -0,0 +1,30 @@
+'use strict'
+
+const write = require('../write')
+
+function PubRel (packet) {
+  this.cmd = 'pubrel'
+  this.messageId = packet.messageId
+}
+
+function handlePubrec (client, packet, done) {
+  const pubrel = new PubRel(packet)
+
+  if (client.clean) {
+    write(client, pubrel, done)
+    return
+  }
+
+  client.broker.persistence.outgoingUpdate(
+    client, pubrel, reply)
+
+  function reply (err) {
+    if (err) {
+      done(err)
+    } else {
+      write(client, pubrel, done)
+    }
+  }
+}
+
+module.exports = handlePubrec
diff --git a/mqtt-backend/node_modules/aedes/lib/handlers/pubrel.js b/mqtt-backend/node_modules/aedes/lib/handlers/pubrel.js
new file mode 100644
index 0000000..09dcc86
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/handlers/pubrel.js
@@ -0,0 +1,50 @@
+'use strict'
+
+const write = require('../write')
+
+function ClientPacketStatus (client, packet) {
+  this.client = client
+  this.packet = packet
+}
+
+function PubComp (packet) {
+  this.cmd = 'pubcomp'
+  this.messageId = packet.messageId
+}
+
+const pubrelActions = [
+  pubrelGet,
+  pubrelPublish,
+  pubrelWrite,
+  pubrelDel
+]
+function handlePubrel (client, packet, done) {
+  client.broker._series(
+    new ClientPacketStatus(client, packet),
+    pubrelActions, {}, done)
+}
+
+function pubrelGet (arg, done) {
+  const persistence = this.client.broker.persistence
+  persistence.incomingGetPacket(this.client, this.packet, reply)
+
+  function reply (err, packet) {
+    arg.packet = packet
+    done(err)
+  }
+}
+
+function pubrelPublish (arg, done) {
+  this.client.broker.publish(arg.packet, this.client, done)
+}
+
+function pubrelWrite (arg, done) {
+  write(this.client, new PubComp(arg.packet), done)
+}
+
+function pubrelDel (arg, done) {
+  const persistence = this.client.broker.persistence
+  persistence.incomingDelPacket(this.client, arg.packet, done)
+}
+
+module.exports = handlePubrel
diff --git a/mqtt-backend/node_modules/aedes/lib/handlers/subscribe.js b/mqtt-backend/node_modules/aedes/lib/handlers/subscribe.js
new file mode 100644
index 0000000..2ae0a46
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/handlers/subscribe.js
@@ -0,0 +1,255 @@
+'use strict'
+
+const fastfall = require('fastfall')
+const Packet = require('aedes-packet')
+const { through } = require('../utils')
+const { validateTopic, $SYS_PREFIX } = require('../utils')
+const write = require('../write')
+
+const subscribeTopicActions = fastfall([
+  authorize,
+  storeSubscriptions,
+  addSubs
+])
+const restoreTopicActions = fastfall([
+  authorize,
+  addSubs
+])
+
+function SubAck (packet, granted) {
+  this.cmd = 'suback'
+  this.messageId = packet.messageId
+  // the qos granted
+  this.granted = granted
+}
+
+function Subscription (qos, func, rh, rap, nl) {
+  this.qos = qos
+  this.func = func
+
+  // retain-handling indicates how retained messages should be
+  // handled when a new subscription is created
+  // (see [MQTT-3.3.1-9] through [MQTT-3.3.1-11])
+  this.rh = rh
+
+  // retain-as-published indicates whether to leave the retain flag as-is (true)
+  // or to clear it before sending to subscriptions (false) default false
+  // (see [MQTT-3.3.1-12] through [MQTT-3.3.1-13])
+  this.rap = rap
+
+  // no-local indicates that a client should not receive its own
+  // messages (see [MQTT-3.8.3-3])
+  this.nl = nl
+}
+
+function SubscribeState (client, packet, restore, finish) {
+  this.client = client
+  this.packet = packet
+  this.actions = restore ? restoreTopicActions : subscribeTopicActions
+  this.finish = finish
+  this.subState = []
+}
+
+function SubState (client, packet, granted, rh, rap, nl) {
+  this.client = client
+  this.packet = packet
+  this.granted = granted
+  this.rh = rh
+  this.rap = rap
+  this.nl = nl
+}
+
+// if same subscribed topic in subs array, we pick up the last one
+function _dedupe (subs) {
+  const dedupeSubs = {}
+  for (let i = 0; i < subs.length; i++) {
+    const sub = subs[i]
+    dedupeSubs[sub.topic] = sub
+  }
+  const ret = []
+  for (const key in dedupeSubs) {
+    ret.push(dedupeSubs[key])
+  }
+  return ret
+}
+
+function handleSubscribe (client, packet, restore, done) {
+  packet.subscriptions = packet.subscriptions.length === 1 ? packet.subscriptions : _dedupe(packet.subscriptions)
+  client.broker._parallel(
+    new SubscribeState(client, packet, restore, done), // what will be this in the functions
+    doSubscribe, // function to call
+    packet.subscriptions, // first argument of the function
+    restore ? done : completeSubscribe // the function to be called when the parallel ends
+  )
+}
+
+function doSubscribe (sub, done) {
+  const s = new SubState(this.client, this.packet, sub.qos, sub.rh, sub.rap, sub.nl)
+  this.subState.push(s)
+  this.actions.call(s, sub, done)
+}
+
+function authorize (sub, done) {
+  const err = validateTopic(sub.topic, 'SUBSCRIBE')
+  if (err) {
+    return done(err)
+  }
+  const client = this.client
+  client.broker.authorizeSubscribe(client, sub, done)
+}
+
+function blockDollarSignTopics (func) {
+  return function deliverSharp (packet, cb) {
+    // '$' is 36
+    if (packet.topic.charCodeAt(0) === 36) {
+      cb()
+    } else {
+      func(packet, cb)
+    }
+  }
+}
+
+function storeSubscriptions (sub, done) {
+  if (!sub || typeof sub !== 'object') {
+    // means failure: MQTT 3.1.1 specs > 3.9.3 Payload
+    this.granted = 128
+    return done(null, null)
+  }
+
+  const packet = this.packet
+  const client = this.client
+
+  if (client.clean) {
+    return done(null, sub)
+  }
+
+  client.broker.persistence.addSubscriptions(client, packet.subscriptions, function addSub (err) {
+    done(err, sub)
+  })
+}
+
+function addSubs (sub, done) {
+  if (!sub || typeof sub !== 'object') {
+    return done()
+  }
+
+  const client = this.client
+  const broker = client.broker
+  const topic = sub.topic
+  const qos = sub.qos
+  const rh = this.rh
+  const rap = this.rap
+  const nl = this.nl
+  let func = qos > 0 ? client.deliverQoS : client.deliver0
+
+  const deliverFunc = func
+  func = function handlePacketSubscription (_packet, cb) {
+    _packet = new Packet(_packet, broker)
+    _packet.nl = nl
+    if (!rap) _packet.retain = false
+    deliverFunc(_packet, cb)
+  }
+
+  // [MQTT-4.7.2-1]
+  if (isStartsWithWildcard(topic)) {
+    func = blockDollarSignTopics(func)
+  }
+
+  if (client.closed || client.broker.closed) {
+    // a hack, sometimes client.close() or broker.close() happened
+    // before authenticate() comes back
+    // we don't continue subscription here
+    return
+  }
+
+  if (!client.subscriptions[topic]) {
+    client.subscriptions[topic] = new Subscription(qos, func, rh, rap, nl)
+    broker.subscribe(topic, func, done)
+  } else if (client.subscriptions[topic].qos !== qos || client.subscriptions[topic].rh !== rh || client.subscriptions[topic].rap !== rap || client.subscriptions[topic].nl !== nl) {
+    broker.unsubscribe(topic, client.subscriptions[topic].func)
+    client.subscriptions[topic] = new Subscription(qos, func, rh, rap, nl)
+    broker.subscribe(topic, func, done)
+  } else {
+    done()
+  }
+}
+
+// + is 43
+// # is 35
+function isStartsWithWildcard (topic) {
+  const code = topic.charCodeAt(0)
+  return code === 43 || code === 35
+}
+
+function completeSubscribe (err) {
+  const done = this.finish
+
+  if (err) {
+    return done(err)
+  }
+
+  const packet = this.packet
+  const client = this.client
+
+  if (packet.messageId !== undefined) {
+    // [MQTT-3.9.3-1]
+    write(client,
+      new SubAck(packet, this.subState.map(obj => obj.granted)),
+      done)
+  } else {
+    done()
+  }
+
+  const broker = client.broker
+
+  // subscriptions array to return as result in 'subscribe' event and $SYS
+  const subs = packet.subscriptions
+
+  // topics we need to retrieve retain values from
+  const topics = []
+
+  for (let i = 0; i < subs.length; i++) {
+    // skip topics that are not allowed
+    if (this.subState[i].granted !== 128) {
+      topics.push(subs[i].topic)
+    }
+    // set granted qos to subscriptions
+    subs[i].qos = this.subState[i].granted
+  }
+
+  this.subState = []
+
+  broker.emit('subscribe', subs, client)
+  broker.publish({
+    topic: $SYS_PREFIX + broker.id + '/new/subscribes',
+    payload: Buffer.from(JSON.stringify({
+      clientId: client.id,
+      subs
+    }), 'utf8')
+  }, noop)
+
+  // Conform to MQTT 3.1.1 section 3.1.2.4
+  // Restored sessions should not contain any retained message.
+  // Retained message should be only fetched from SUBSCRIBE.
+
+  if (topics.length > 0) {
+    const persistence = broker.persistence
+    const stream = persistence.createRetainedStreamCombi(topics)
+    stream.pipe(through(function sendRetained (packet, enc, cb) {
+      packet = new Packet({
+        cmd: packet.cmd,
+        qos: packet.qos,
+        topic: packet.topic,
+        payload: packet.payload,
+        retain: true
+      }, broker)
+      // this should not be deduped
+      packet.brokerId = null
+      client.deliverQoS(packet, cb)
+    }))
+  }
+}
+
+function noop () { }
+
+module.exports = handleSubscribe
diff --git a/mqtt-backend/node_modules/aedes/lib/handlers/unsubscribe.js b/mqtt-backend/node_modules/aedes/lib/handlers/unsubscribe.js
new file mode 100644
index 0000000..e08c317
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/handlers/unsubscribe.js
@@ -0,0 +1,104 @@
+'use strict'
+
+const write = require('../write')
+const { validateTopic, $SYS_PREFIX } = require('../utils')
+
+function UnSubAck (packet) {
+  this.cmd = 'unsuback'
+  this.messageId = packet.messageId // [MQTT-3.10.4-4]
+}
+
+function UnsubscribeState (client, packet, finish) {
+  this.client = client
+  this.packet = packet
+  this.finish = finish
+}
+
+function handleUnsubscribe (client, packet, done) {
+  const broker = client.broker
+  const unsubscriptions = packet.unsubscriptions
+  let err
+
+  for (let i = 0; i < unsubscriptions.length; i++) {
+    err = validateTopic(unsubscriptions[i], 'UNSUBSCRIBE')
+    if (err) {
+      return done(err)
+    }
+  }
+
+  if (packet.messageId !== undefined) {
+    if (client.clean) {
+      return actualUnsubscribe(client, packet, done)
+    }
+
+    broker.persistence.removeSubscriptions(client, unsubscriptions, function (err) {
+      if (err) {
+        return done(err)
+      }
+
+      actualUnsubscribe(client, packet, done)
+    })
+  } else {
+    actualUnsubscribe(client, packet, done)
+  }
+}
+
+function actualUnsubscribe (client, packet, done) {
+  const broker = client.broker
+  broker._parallel(
+    new UnsubscribeState(client, packet, done),
+    doUnsubscribe,
+    packet.unsubscriptions,
+    completeUnsubscribe)
+}
+
+function doUnsubscribe (sub, done) {
+  const client = this.client
+  const broker = client.broker
+  const s = client.subscriptions[sub]
+
+  if (s) {
+    const func = s.func
+    delete client.subscriptions[sub]
+    broker.unsubscribe(
+      sub,
+      func,
+      done)
+  } else {
+    done()
+  }
+}
+
+function completeUnsubscribe (err) {
+  const client = this.client
+
+  if (err) {
+    client.emit('error', err)
+    return
+  }
+
+  const packet = this.packet
+  const done = this.finish
+
+  if (packet.messageId !== undefined) {
+    write(client, new UnSubAck(packet),
+      done)
+  } else {
+    done()
+  }
+
+  if ((!client.closed || client.clean === true) && packet.unsubscriptions.length > 0) {
+    client.broker.emit('unsubscribe', packet.unsubscriptions, client)
+    client.broker.publish({
+      topic: $SYS_PREFIX + client.broker.id + '/new/unsubscribes',
+      payload: Buffer.from(JSON.stringify({
+        clientId: client.id,
+        subs: packet.unsubscriptions
+      }), 'utf8')
+    }, noop)
+  }
+}
+
+function noop () { }
+
+module.exports = handleUnsubscribe
diff --git a/mqtt-backend/node_modules/aedes/lib/qos-packet.js b/mqtt-backend/node_modules/aedes/lib/qos-packet.js
new file mode 100644
index 0000000..5527fe1
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/qos-packet.js
@@ -0,0 +1,25 @@
+'use strict'
+
+const Packet = require('aedes-packet')
+const util = require('util')
+
+function QoSPacket (original, client) {
+  Packet.call(this, original, client.broker)
+
+  this.writeCallback = client._onError.bind(client)
+
+  if (!original.messageId) {
+    this.messageId = client._nextId
+    if (client._nextId >= 65535) {
+      client._nextId = 1
+    } else {
+      client._nextId++
+    }
+  } else {
+    this.messageId = original.messageId
+  }
+}
+
+util.inherits(QoSPacket, Packet)
+
+module.exports = QoSPacket
diff --git a/mqtt-backend/node_modules/aedes/lib/utils.js b/mqtt-backend/node_modules/aedes/lib/utils.js
new file mode 100644
index 0000000..4ebd34f
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/utils.js
@@ -0,0 +1,56 @@
+'use strict'
+
+const { Transform, Writable } = require('stream')
+
+function validateTopic (topic, message) {
+  if (!topic || topic.length === 0) { // [MQTT-3.8.3-3]
+    return new Error('impossible to ' + message + ' to an empty topic')
+  }
+
+  const end = topic.length - 1
+  const endMinus = end - 1
+  const slashInPreEnd = endMinus > 0 && topic.charCodeAt(endMinus) !== 47
+
+  for (let i = 0; i < topic.length; i++) {
+    switch (topic.charCodeAt(i)) {
+      case 35: { // #
+        const notAtTheEnd = i !== end
+        if (notAtTheEnd || slashInPreEnd) {
+          return new Error('# is only allowed in ' + message + ' in the last position')
+        }
+        break
+      }
+      case 43: { // +
+        const pastChar = i < end - 1 && topic.charCodeAt(i + 1) !== 47
+        const preChar = i > 1 && topic.charCodeAt(i - 1) !== 47
+        if (pastChar || preChar) {
+          return new Error('+ is only allowed in ' + message + ' between /')
+        }
+        break
+      }
+    }
+  }
+}
+
+function through (transform) {
+  return new Transform({
+    objectMode: true,
+    transform
+  })
+}
+
+function bulk (fn) {
+  return new Writable({
+    objectMode: true,
+    writev: function (chunks, cb) {
+      fn(chunks.map(chunk => chunk.chunk), cb)
+    }
+  })
+}
+
+module.exports = {
+  validateTopic,
+  through,
+  bulk,
+  $SYS_PREFIX: '$SYS/'
+}
diff --git a/mqtt-backend/node_modules/aedes/lib/write.js b/mqtt-backend/node_modules/aedes/lib/write.js
new file mode 100644
index 0000000..716d81a
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/lib/write.js
@@ -0,0 +1,24 @@
+'use strict'
+
+const mqtt = require('mqtt-packet')
+
+function write (client, packet, done) {
+  let error = null
+  if (client.connecting || client.connected) {
+    try {
+      const result = mqtt.writeToStream(packet, client.conn)
+      if (!result && !client.errored) {
+        client.conn.once('drain', done)
+        return
+      }
+    } catch (e) {
+      error = new Error('packet received not valid')
+    }
+  } else {
+    error = new Error('connection closed')
+  }
+
+  setImmediate(done, error, client)
+}
+
+module.exports = write
diff --git a/mqtt-backend/node_modules/aedes/package.json b/mqtt-backend/node_modules/aedes/package.json
new file mode 100644
index 0000000..74520c8
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/package.json
@@ -0,0 +1,138 @@
+{
+  "name": "aedes",
+  "version": "0.51.3",
+  "description": "Stream-based MQTT broker",
+  "main": "aedes.js",
+  "types": "aedes.d.ts",
+  "scripts": {
+    "lint": "npm run lint:standard && npm run lint:typescript && npm run lint:markdown",
+    "lint:fix": "standard --fix && eslint -c types/.eslintrc.json --fix aedes.d.ts types/**/*.ts test/types/**/*.test-d.ts",
+    "lint:standard": "standard --verbose | snazzy",
+    "lint:typescript": "eslint -c types/.eslintrc.json aedes.d.ts types/**/*.ts test/types/**/*.test-d.ts",
+    "lint:markdown": "markdownlint docs/*.md README.md",
+    "test": "npm run lint && npm run unit && npm run test:typescript",
+    "test:ci": "npm run lint && npm run unit -- --cov --no-check-coverage --coverage-report=lcovonly && npm run test:typescript",
+    "test:report": "npm run lint && npm run unit:report && npm run test:typescript",
+    "test:typescript": "tsd",
+    "unit": "tap -J test/*.js",
+    "unit:report": "tap -J test/*.js --cov --coverage-report=html --coverage-report=cobertura | tee out.tap",
+    "license-checker": "license-checker --production --onlyAllow=\"MIT;ISC;BSD-3-Clause;BSD-2-Clause;0BSD\"",
+    "release": "read -p 'GITHUB_TOKEN: ' GITHUB_TOKEN && export GITHUB_TOKEN=$GITHUB_TOKEN && release-it --disable-metrics"
+  },
+  "release-it": {
+    "github": {
+      "release": true
+    },
+    "git": {
+      "tagName": "v${version}"
+    },
+    "hooks": {
+      "before:init": [
+        "npm run test:ci"
+      ]
+    },
+    "npm": {
+      "publish": true
+    }
+  },
+  "pre-commit": [
+    "test"
+  ],
+  "tsd": {
+    "directory": "test/types"
+  },
+  "standard": {
+    "ignore": [
+      "types/*",
+      "test/types/*"
+    ]
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/moscajs/aedes.git"
+  },
+  "keywords": [
+    "mqtt",
+    "broker",
+    "server",
+    "mqtt-server",
+    "stream",
+    "streams",
+    "publish",
+    "subscribe",
+    "pubsub",
+    "messaging",
+    "mosca",
+    "mosquitto",
+    "iot",
+    "internet",
+    "of",
+    "things"
+  ],
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "contributors": [
+    {
+      "name": "Gavin D'mello",
+      "url": "https://github.com/GavinDmello"
+    },
+    {
+      "name": "Behrad Zari",
+      "url": "https://github.com/behrad"
+    },
+    {
+      "name": "Gnought",
+      "url": "https://github.com/gnought"
+    },
+    {
+      "name": "Daniel Lando",
+      "url": "https://github.com/robertsLando"
+    }
+  ],
+  "license": "MIT",
+  "funding": {
+    "type": "opencollective",
+    "url": "https://opencollective.com/aedes"
+  },
+  "bugs": {
+    "url": "https://github.com/moscajs/aedes/issues"
+  },
+  "homepage": "https://github.com/moscajs/aedes#readme",
+  "engines": {
+    "node": ">=16"
+  },
+  "devDependencies": {
+    "@sinonjs/fake-timers": "^11.2.2",
+    "@types/node": "^20.11.17",
+    "@typescript-eslint/eslint-plugin": "^7.0.1",
+    "@typescript-eslint/parser": "^7.0.1",
+    "concat-stream": "^2.0.0",
+    "duplexify": "^4.1.2",
+    "license-checker": "^25.0.1",
+    "markdownlint-cli": "^0.41.0",
+    "mqtt": "^5.3.5",
+    "mqtt-connection": "^4.1.0",
+    "pre-commit": "^1.2.2",
+    "proxyquire": "^2.1.3",
+    "release-it": "^17.0.5",
+    "snazzy": "^9.0.0",
+    "standard": "^17.1.0",
+    "tap": "^16.3.10",
+    "tsd": "^0.31.0",
+    "typescript": "^5.3.3",
+    "websocket-stream": "^5.5.2"
+  },
+  "dependencies": {
+    "aedes-packet": "^3.0.0",
+    "aedes-persistence": "^9.1.2",
+    "end-of-stream": "^1.4.4",
+    "fastfall": "^1.5.1",
+    "fastparallel": "^2.4.1",
+    "fastseries": "^2.0.0",
+    "hyperid": "^3.2.0",
+    "mqemitter": "^6.0.0",
+    "mqtt-packet": "^9.0.0",
+    "retimer": "^4.0.0",
+    "reusify": "^1.0.4",
+    "uuid": "^10.0.0"
+  }
+}
diff --git a/mqtt-backend/node_modules/aedes/test/auth.js b/mqtt-backend/node_modules/aedes/test/auth.js
new file mode 100644
index 0000000..248657c
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/auth.js
@@ -0,0 +1,1177 @@
+'use strict'
+
+const { test } = require('tap')
+const eos = require('end-of-stream')
+const Faketimers = require('@sinonjs/fake-timers')
+const Client = require('../lib/client')
+const { setup, connect, noError, subscribe, subscribeMultiple } = require('./helper')
+const aedes = require('../')
+
+test('authenticate successfully a client with username and password', function (t) {
+  t.plan(4)
+
+  const s = noError(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authenticate = function (client, username, password, cb) {
+    t.type(client, Client, 'client is there')
+    t.equal(username, 'my username', 'username is there')
+    t.same(password, Buffer.from('my pass'), 'password is there')
+    cb(null, true)
+  }
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    username: 'my username',
+    password: 'my pass',
+    keepalive: 0
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 0,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'successful connack')
+  })
+})
+
+test('authenticate unsuccessfully a client with username and password', function (t) {
+  t.plan(6)
+
+  const s = setup()
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authenticate = function (client, username, password, cb) {
+    t.type(client, Client, 'client is there')
+    t.equal(username, 'my username', 'username is there')
+    t.same(password, Buffer.from('my pass'), 'password is there')
+    cb(null, false)
+  }
+
+  s.broker.on('clientError', function (client, err) {
+    t.equal(err.errorCode, 5)
+  })
+
+  s.broker.on('clientReady', function (client) {
+    t.fail('client should not ready')
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 5,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'unsuccessful connack, unauthorized')
+  })
+
+  eos(s.outStream, function () {
+    t.equal(s.broker.connectedClients, 0, 'no connected clients')
+  })
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    username: 'my username',
+    password: 'my pass',
+    keepalive: 0
+  })
+})
+
+test('authenticate errors', function (t) {
+  t.plan(7)
+
+  const s = setup()
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authenticate = function (client, username, password, cb) {
+    t.type(client, Client, 'client is there')
+    t.equal(username, 'my username', 'username is there')
+    t.same(password, Buffer.from('my pass'), 'password is there')
+    cb(new Error('this should happen!'))
+  }
+
+  s.broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'this should happen!')
+    t.equal(err.errorCode, 5)
+  })
+
+  s.broker.on('clientReady', function (client) {
+    t.fail('client should not ready')
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 5,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'unsuccessful connack, unauthorized')
+  })
+
+  eos(s.outStream, function () {
+    t.equal(s.broker.connectedClients, 0, 'no connected clients')
+  })
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    username: 'my username',
+    password: 'my pass',
+    keepalive: 0
+  })
+})
+
+test('authentication error when return code 1 (unacceptable protocol version) is passed', function (t) {
+  t.plan(7)
+
+  const s = setup()
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authenticate = function (client, username, password, cb) {
+    t.type(client, Client, 'client is there')
+    t.equal(username, 'my username', 'username is there')
+    t.same(password, Buffer.from('my pass'), 'password is there')
+    const error = new Error('Auth error')
+    error.returnCode = 1
+    cb(error, null)
+  }
+
+  s.broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'Auth error')
+    t.equal(err.errorCode, 5)
+  })
+
+  s.broker.on('clientReady', function (client) {
+    t.fail('client should not ready')
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 5,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'unsuccessful connack, unauthorized')
+  })
+
+  eos(s.outStream, function () {
+    t.equal(s.broker.connectedClients, 0, 'no connected clients')
+  })
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    username: 'my username',
+    password: 'my pass',
+    keepalive: 0
+  })
+})
+
+test('authentication error when return code 2 (identifier rejected) is passed', function (t) {
+  t.plan(7)
+
+  const s = setup()
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authenticate = function (client, username, password, cb) {
+    t.type(client, Client, 'client is there')
+    t.equal(username, 'my username', 'username is there')
+    t.same(password, Buffer.from('my pass'), 'password is there')
+    const error = new Error('Auth error')
+    error.returnCode = 2
+    cb(error, null)
+  }
+
+  s.broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'Auth error')
+    t.equal(err.errorCode, 2)
+  })
+
+  s.broker.on('clientReady', function (client) {
+    t.fail('client should not ready')
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 2,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'unsuccessful connack, identifier rejected')
+  })
+
+  eos(s.outStream, function () {
+    t.equal(s.broker.connectedClients, 0, 'no connected clients')
+  })
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    username: 'my username',
+    password: 'my pass',
+    keepalive: 0
+  })
+})
+
+test('authentication error when return code 3 (Server unavailable) is passed', function (t) {
+  t.plan(7)
+
+  const s = setup()
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authenticate = function (client, username, password, cb) {
+    t.type(client, Client, 'client is there')
+    t.equal(username, 'my username', 'username is there')
+    t.same(password, Buffer.from('my pass'), 'password is there')
+    const error = new Error('Auth error')
+    error.returnCode = 3
+    cb(error, null)
+  }
+
+  s.broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'Auth error')
+    t.equal(err.errorCode, 3)
+  })
+
+  s.broker.on('clientReady', function (client) {
+    t.fail('client should not ready')
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 3,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'unsuccessful connack, Server unavailable')
+  })
+
+  eos(s.outStream, function () {
+    t.equal(s.broker.connectedClients, 0, 'no connected clients')
+  })
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    username: 'my username',
+    password: 'my pass',
+    keepalive: 0
+  })
+})
+
+test('authentication error when return code 4 (bad user or password) is passed', function (t) {
+  t.plan(7)
+
+  const s = setup()
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authenticate = function (client, username, password, cb) {
+    t.type(client, Client, 'client is there')
+    t.equal(username, 'my username', 'username is there')
+    t.same(password, Buffer.from('my pass'), 'password is there')
+    const error = new Error('Auth error')
+    error.returnCode = 4
+    cb(error, null)
+  }
+
+  s.broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'Auth error')
+    t.equal(err.errorCode, 4)
+  })
+
+  s.broker.on('clientReady', function (client) {
+    t.fail('client should not ready')
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 4,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'unsuccessful connack, bad username or password')
+  })
+
+  eos(s.outStream, function () {
+    t.equal(s.broker.connectedClients, 0, 'no connected clients')
+  })
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    username: 'my username',
+    password: 'my pass',
+    keepalive: 0
+  })
+})
+
+test('authentication error when non numeric return code is passed', function (t) {
+  t.plan(7)
+
+  const s = setup()
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authenticate = function (client, username, password, cb) {
+    t.type(client, Client, 'client is there')
+    t.equal(username, 'my username', 'username is there')
+    t.same(password, Buffer.from('my pass'), 'password is there')
+    const error = new Error('Non numeric error codes')
+    error.returnCode = 'return Code'
+    cb(error, null)
+  }
+
+  s.broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'Non numeric error codes')
+    t.equal(err.errorCode, 5)
+  })
+
+  s.broker.on('clientReady', function (client) {
+    t.fail('client should not ready')
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 5,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'unsuccessful connack, unauthorized')
+  })
+
+  eos(s.outStream, function () {
+    t.equal(s.broker.connectedClients, 0, 'no connected clients')
+  })
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    username: 'my username',
+    password: 'my pass',
+    keepalive: 0
+  })
+})
+
+test('authorize publish', function (t) {
+  t.plan(4)
+
+  const s = connect(setup(), { clientId: 'my-client-xyz' })
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: false,
+    length: 12,
+    dup: false
+  }
+
+  s.broker.authorizePublish = function (client, packet, cb) {
+    t.ok(client, 'client exists')
+    t.same(packet, expected, 'packet matches')
+    cb()
+  }
+
+  s.broker.mq.on('hello', function (packet, cb) {
+    t.notOk(Object.prototype.hasOwnProperty.call(packet, 'messageId'), 'should not contain messageId in QoS 0')
+    expected.brokerId = s.broker.id
+    expected.brokerCounter = s.broker.counter
+    expected.clientId = 'my-client-xyz'
+    delete expected.length
+    t.same(packet, expected, 'packet matches')
+    cb()
+  })
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world'
+  })
+})
+
+test('authorize waits for authenticate', function (t) {
+  t.plan(6)
+
+  const s = setup(aedes({ clientId: 'my-client-xyz-2' }))
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authenticate = function (client, username, password, cb) {
+    t.type(client, Client, 'client is there')
+    process.nextTick(function () {
+      t.equal(username, 'my username', 'username is there')
+      t.same(password, Buffer.from('my pass'), 'password is there')
+      client.authenticated = true
+      cb(null, true)
+    })
+  }
+
+  s.broker.authorizePublish = function (client, packet, cb) {
+    t.ok(client.authenticated, 'client authenticated')
+    cb()
+  }
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: false,
+    length: 12,
+    dup: false,
+    clientId: 'my-client'
+  }
+
+  s.broker.mq.on('hello', function (packet, cb) {
+    t.notOk(Object.prototype.hasOwnProperty.call(packet, 'messageId'), 'should not contain messageId in QoS 0')
+    expected.brokerId = s.broker.id
+    expected.brokerCounter = s.broker.counter
+    delete expected.length
+    t.same(packet, expected, 'packet matches')
+    cb()
+  })
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    username: 'my username',
+    password: 'my pass',
+    keepalive: 0
+  })
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world'
+  })
+})
+
+test('authorize publish from configOptions', function (t) {
+  t.plan(4)
+
+  const s = connect(setup(aedes({
+    clientId: 'my-client-xyz-3',
+    authorizePublish: function (client, packet, cb) {
+      t.ok(client, 'client exists')
+      t.same(packet, expected, 'packet matches')
+      cb()
+    }
+  })), { clientId: 'my-client-xyz-3' })
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: false,
+    length: 12,
+    dup: false
+  }
+
+  s.broker.mq.on('hello', function (packet, cb) {
+    t.notOk(Object.prototype.hasOwnProperty.call(packet, 'messageId'), 'should not contain messageId in QoS 0')
+    expected.brokerId = s.broker.id
+    expected.brokerCounter = s.broker.counter
+    expected.clientId = 'my-client-xyz-3'
+    delete expected.length
+    t.same(packet, expected, 'packet matches')
+    cb()
+  })
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world'
+  })
+})
+
+test('do not authorize publish', function (t) {
+  t.plan(3)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: false,
+    length: 12,
+    dup: false
+  }
+
+  s.broker.authorizePublish = function (client, packet, cb) {
+    t.ok(client, 'client exists')
+    t.same(packet, expected, 'packet matches')
+    cb(new Error('auth negated'))
+  }
+
+  eos(s.conn, function () {
+    t.equal(s.broker.connectedClients, 0, 'no connected clients')
+  })
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world'
+  })
+})
+
+test('modify qos out of range in authorize publish ', function (t) {
+  t.plan(2)
+
+  const s = connect(setup(), { clientId: 'my-client-xyz-4' })
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'foo',
+    payload: Buffer.from('bar'),
+    qos: 0,
+    retain: false,
+    length: 12,
+    dup: false,
+    clientId: 'my-client-xyz-4'
+  }
+
+  s.broker.authorizePublish = function (client, packet, cb) {
+    if (packet.topic === 'hello') { packet.qos = 10 }
+    cb()
+  }
+
+  s.outStream.on('data', function (packet) {
+    t.fail('should no data sent')
+  })
+  s.broker.mq.on('hello', function (packet, cb) {
+    t.fail('should not publish')
+  })
+  s.broker.mq.on('foo', function (packet, cb) {
+    t.notOk(Object.prototype.hasOwnProperty.call(packet, 'messageId'), 'should not contain messageId in QoS 0')
+    expected.brokerId = s.broker.id
+    expected.brokerCounter = s.broker.counter
+    delete expected.length
+    t.same(packet, expected, 'packet matches')
+    cb()
+  })
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world'
+  })
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'foo',
+    payload: 'bar'
+  })
+})
+
+test('authorize subscribe', function (t) {
+  t.plan(5)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authorizeSubscribe = function (client, sub, cb) {
+    t.ok(client, 'client exists')
+    t.same(sub, {
+      topic: 'hello',
+      qos: 0
+    }, 'topic matches')
+    cb(null, sub)
+  }
+
+  subscribe(t, s, 'hello', 0)
+})
+
+test('authorize subscribe multiple same topics with same qos', function (t) {
+  t.plan(4)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authorizeSubscribe = function (client, sub, cb) {
+    t.same(sub, {
+      topic: 'hello',
+      qos: 0
+    }, 'topic matches')
+    cb(null, sub)
+  }
+
+  subscribeMultiple(t, s, [{ topic: 'hello', qos: 0 }, { topic: 'hello', qos: 0 }], [0])
+})
+
+test('authorize subscribe multiple same topics with different qos', function (t) {
+  t.plan(4)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authorizeSubscribe = function (client, sub, cb) {
+    t.same(sub, {
+      topic: 'hello',
+      qos: 1
+    }, 'topic matches')
+    cb(null, sub)
+  }
+
+  subscribeMultiple(t, s, [{ topic: 'hello', qos: 0 }, { topic: 'hello', qos: 1 }], [1])
+})
+
+test('authorize subscribe multiple different topics', function (t) {
+  t.plan(7)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authorizeSubscribe = function (client, sub, cb) {
+    t.ok(client, 'client exists')
+    if (sub.topic === 'hello') {
+      t.same(sub, {
+        topic: 'hello',
+        qos: 0
+      }, 'topic matches')
+    } else if (sub.topic === 'foo') {
+      t.same(sub, {
+        topic: 'foo',
+        qos: 0
+      }, 'topic matches')
+    }
+    cb(null, sub)
+  }
+
+  subscribeMultiple(t, s, [{ topic: 'hello', qos: 0 }, { topic: 'foo', qos: 0 }], [0, 0])
+})
+
+test('authorize subscribe from config options', function (t) {
+  t.plan(5)
+
+  const s = connect(setup(aedes({
+    authorizeSubscribe: function (client, sub, cb) {
+      t.ok(client, 'client exists')
+      t.same(sub, {
+        topic: 'hello',
+        qos: 0
+      }, 'topic matches')
+      cb(null, sub)
+    }
+  })))
+  t.teardown(s.broker.close.bind(s.broker))
+
+  subscribe(t, s, 'hello', 0)
+})
+
+test('negate subscription', function (t) {
+  t.plan(5)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authorizeSubscribe = function (client, sub, cb) {
+    t.ok(client, 'client exists')
+    t.same(sub, {
+      topic: 'hello',
+      qos: 0
+    }, 'topic matches')
+    cb(null, null)
+  }
+
+  s.inStream.write({
+    cmd: 'subscribe',
+    messageId: 24,
+    subscriptions: [{
+      topic: 'hello',
+      qos: 0
+    }]
+  })
+
+  s.outStream.once('data', function (packet) {
+    t.equal(packet.cmd, 'suback')
+    t.same(packet.granted, [128])
+    t.equal(packet.messageId, 24)
+  })
+})
+
+test('negate multiple subscriptions', function (t) {
+  t.plan(6)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.authorizeSubscribe = function (client, sub, cb) {
+    t.ok(client, 'client exists')
+    cb(null, null)
+  }
+
+  const expectedSubs = [{
+    topic: 'hello',
+    qos: 128
+  }, {
+    topic: 'world',
+    qos: 128
+  }]
+
+  s.broker.once('subscribe', function (subs, client) {
+    t.same(subs, expectedSubs)
+  })
+
+  s.inStream.write({
+    cmd: 'subscribe',
+    messageId: 24,
+    subscriptions: [{
+      topic: 'hello',
+      qos: 0
+    }, {
+      topic: 'world',
+      qos: 0
+    }]
+  })
+
+  s.outStream.once('data', function (packet) {
+    t.equal(packet.cmd, 'suback')
+    t.same(packet.granted, [128, 128])
+    t.equal(packet.messageId, 24)
+  })
+})
+
+test('negate subscription with correct persistence', function (t) {
+  t.plan(6)
+
+  // rh, rap, nl are undefined because mqtt.parser is set to MQTT 3.1.1 and will thus erase these props from s.inStream.write
+  const expected = [{
+    topic: 'hello',
+    qos: 0,
+    rh: undefined,
+    rap: undefined,
+    nl: undefined
+  }, {
+    topic: 'world',
+    qos: 0,
+    rh: undefined,
+    rap: undefined,
+    nl: undefined
+  }]
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.authorizeSubscribe = function (client, sub, cb) {
+    t.ok(client, 'client exists')
+    if (sub.topic === 'hello') {
+      sub = null
+    }
+    cb(null, sub)
+  }
+
+  const s = connect(setup(broker), { clean: false, clientId: 'abcde' })
+  s.outStream.once('data', function (packet) {
+    t.equal(packet.cmd, 'suback')
+    t.same(packet.granted, [128, 0])
+    broker.persistence.subscriptionsByClient(broker.clients.abcde, function (_, subs, client) {
+      t.same(subs, expected)
+    })
+    t.equal(packet.messageId, 24)
+  })
+
+  s.inStream.write({
+    cmd: 'subscribe',
+    messageId: 24,
+    subscriptions: [{
+      topic: 'hello',
+      qos: 0,
+      rh: 0,
+      rap: true,
+      nl: false
+    }, {
+      topic: 'world',
+      qos: 0,
+      rh: 0,
+      rap: true,
+      nl: false
+    }]
+  })
+})
+
+test('negate multiple subscriptions random times', function (t) {
+  t.plan(5)
+
+  const clock = Faketimers.createClock()
+  const s = connect(setup())
+  t.teardown(function () {
+    clock.reset()
+    s.broker.close()
+  })
+
+  s.broker.authorizeSubscribe = function (client, sub, cb) {
+    t.ok(client, 'client exists')
+    if (sub.topic === 'hello') {
+      clock.setTimeout(function () {
+        cb(null, sub)
+      }, 100)
+    } else {
+      cb(null, null)
+      clock.tick(100)
+    }
+  }
+
+  s.inStream.write({
+    cmd: 'subscribe',
+    messageId: 24,
+    subscriptions: [{
+      topic: 'hello',
+      qos: 0
+    }, {
+      topic: 'world',
+      qos: 0
+    }]
+  })
+
+  s.outStream.once('data', function (packet) {
+    t.equal(packet.cmd, 'suback')
+    t.same(packet.granted, [0, 128])
+    t.equal(packet.messageId, 24)
+  })
+})
+
+test('failed authentication does not disconnect other client with same clientId', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+  const s0 = setup(broker)
+
+  broker.authenticate = function (client, username, password, cb) {
+    cb(null, password.toString() === 'right')
+  }
+
+  s0.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    username: 'my username',
+    password: 'right',
+    keepalive: 0
+  })
+
+  s0.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 0,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'successful connack')
+
+    s.inStream.write({
+      cmd: 'connect',
+      protocolId: 'MQTT',
+      protocolVersion: 4,
+      clean: true,
+      clientId: 'my-client',
+      username: 'my username',
+      password: 'wrong',
+      keepalive: 0
+    })
+  })
+
+  const removeEos = eos(s0.outStream, function () {
+    t.fail('ended before time')
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 5,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'unsuccessful connack')
+  })
+
+  eos(s.outStream, function () {
+    t.pass('ended')
+    removeEos()
+  })
+})
+
+test('unauthorized connection should not unregister the correct one with same clientId', function (t) {
+  t.plan(4)
+
+  const broker = aedes({
+    authenticate: function (client, username, password, callback) {
+      if (username === 'correct') {
+        callback(null, true)
+      } else {
+        const error = new Error()
+        error.returnCode = 4
+        callback(error, false)
+      }
+    }
+  })
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'bad user name or password')
+    t.equal(err.errorCode, 4)
+    t.equal(broker.connectedClients, 1, 'my-client still connected')
+  })
+
+  connect(setup(broker), {
+    clientId: 'my-client',
+    username: 'correct'
+  }, function () {
+    t.equal(broker.connectedClients, 1, 'my-client connected')
+    connect(setup(broker), {
+      clientId: 'my-client',
+      username: 'unauthorized'
+    }, function () {
+      // other unauthorized connection with the same clientId should not unregister the correct one.
+      t.fail('unauthorized should not connect')
+    })
+  })
+})
+
+test('set authentication method in config options', function (t) {
+  t.plan(5)
+
+  const s = setup(aedes({
+    authenticate: function (client, username, password, cb) {
+      t.type(client, Client, 'client is there')
+      t.equal(username, 'my username', 'username is there')
+      t.same(password, Buffer.from('my pass'), 'password is there')
+      cb(null, false)
+    }
+  }))
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 5,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'unsuccessful connack')
+  })
+
+  eos(s.outStream, function () {
+    t.equal(s.broker.connectedClients, 0, 'no connected clients')
+  })
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    username: 'my username',
+    password: 'my pass',
+    keepalive: 0
+  })
+})
+
+test('change a topic name inside authorizeForward method in QoS 1 mode', function (t) {
+  t.plan(3)
+
+  const broker = aedes({
+    authorizeForward: function (client, packet) {
+      packet.payload = Buffer.from('another-world')
+      packet.messageId = 2
+      return packet
+    }
+  })
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('another-world'),
+    dup: false,
+    length: 22,
+    qos: 1,
+    retain: false,
+    messageId: 2
+  }
+
+  broker.on('client', function (client) {
+    client.subscribe({
+      topic: 'hello',
+      qos: 1
+    }, function (err) {
+      t.error(err, 'no error')
+
+      broker.publish({
+        topic: 'hello',
+        payload: Buffer.from('world'),
+        qos: 1
+      }, function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+
+  const s = connect(setup(broker))
+
+  s.outStream.once('data', function (packet) {
+    t.same(packet, expected, 'packet matches')
+  })
+})
+
+;[true, false].forEach(function (cleanSession) {
+  test(`unauthorized forward publish in QoS 1 mode [clean=${cleanSession}]`, function (t) {
+    t.plan(2)
+
+    const broker = aedes({
+      authorizeForward: function (client, packet) {
+        return null
+      }
+    })
+    t.teardown(broker.close.bind(broker))
+
+    broker.on('client', function (client) {
+      client.subscribe({
+        topic: 'hello',
+        qos: 1
+      }, function (err) {
+        t.error(err, 'no error')
+
+        broker.publish({
+          topic: 'hello',
+          payload: Buffer.from('world'),
+          qos: 1
+        }, function (err) {
+          t.error(err, 'no error')
+        })
+      })
+    })
+
+    const s = connect(setup(broker), { clean: cleanSession })
+
+    s.outStream.once('data', function (packet) {
+      t.fail('Should have not recieved this packet')
+    })
+  })
+})
+
+test('prevent publish in QoS 0 mode', function (t) {
+  t.plan(2)
+
+  const broker = aedes({
+    authorizeForward: function (client, packet) {
+      return null
+    }
+  })
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('client', function (client) {
+    client.subscribe({
+      topic: 'hello',
+      qos: 0
+    }, function (err) {
+      t.error(err, 'no error')
+
+      broker.publish({
+        topic: 'hello',
+        payload: Buffer.from('world'),
+        qos: 0
+      }, function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+
+  const s = connect(setup(broker))
+
+  s.outStream.once('data', function (packet) {
+    t.fail('Should have not recieved this packet')
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/test/basic.js b/mqtt-backend/node_modules/aedes/test/basic.js
new file mode 100644
index 0000000..6ca103f
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/basic.js
@@ -0,0 +1,865 @@
+'use strict'
+
+const { test } = require('tap')
+const eos = require('end-of-stream')
+const { setup, connect, subscribe, subscribeMultiple, noError } = require('./helper')
+const aedes = require('../')
+const proxyquire = require('proxyquire')
+
+test('test aedes.createBroker', function (t) {
+  t.plan(1)
+
+  const broker = aedes.createBroker()
+  t.teardown(broker.close.bind(broker))
+
+  connect(setup(broker), {}, function () {
+    t.pass('connected')
+  })
+})
+
+test('publish QoS 0', function (t) {
+  t.plan(2)
+
+  const s = connect(setup(), { clientId: 'my-client-xyz-5' })
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: false,
+    dup: false,
+    clientId: 'my-client-xyz-5'
+  }
+
+  s.broker.mq.on('hello', function (packet, cb) {
+    expected.brokerId = s.broker.id
+    expected.brokerCounter = s.broker.counter
+    t.equal(packet.messageId, undefined, 'MUST not contain a packet identifier in QoS 0')
+    t.same(packet, expected, 'packet matches')
+    cb()
+  })
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world'
+  })
+})
+
+test('messageId shoud reset to 1 if it reached 65535', function (t) {
+  t.plan(7)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const publishPacket = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 1,
+    messageId: 42
+  }
+  let count = 0
+  s.broker.on('clientReady', function (client) {
+    subscribe(t, s, 'hello', 1, function () {
+      client._nextId = 65535
+      s.outStream.on('data', function (packet) {
+        if (packet.cmd === 'puback') {
+          t.equal(packet.messageId, 42)
+        }
+        if (packet.cmd === 'publish') {
+          t.equal(packet.messageId, count++ === 0 ? 65535 : 1)
+        }
+      })
+      s.inStream.write(publishPacket)
+      s.inStream.write(publishPacket)
+    })
+  })
+})
+
+test('publish empty topic throws error', function (t) {
+  t.plan(1)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: '',
+    payload: 'world'
+  })
+
+  s.broker.on('clientError', function (client, err) {
+    t.pass('should emit error')
+  })
+})
+
+test('publish to $SYS topic throws error', function (t) {
+  t.plan(1)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: '$SYS/not/allowed',
+    payload: 'world'
+  })
+
+  s.broker.on('clientError', function (client, err) {
+    t.pass('should emit error')
+  })
+})
+
+;[{ qos: 0, clean: false }, { qos: 0, clean: true }, { qos: 1, clean: false }, { qos: 1, clean: true }].forEach(function (ele) {
+  test('subscribe a single topic in QoS ' + ele.qos + ' [clean=' + ele.clean + ']', function (t) {
+    t.plan(5)
+
+    const s = connect(setup(), { clean: ele.clean })
+    t.teardown(s.broker.close.bind(s.broker))
+
+    const expected = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      dup: false,
+      length: 12,
+      qos: 0,
+      retain: false
+    }
+    const expectedSubs = ele.clean ? null : [{ topic: 'hello', qos: ele.qos, rh: undefined, rap: undefined, nl: undefined }]
+
+    subscribe(t, s, 'hello', ele.qos, function () {
+      s.outStream.once('data', function (packet) {
+        t.same(packet, expected, 'packet matches')
+      })
+
+      s.broker.persistence.subscriptionsByClient(s.client, function (_, subs) {
+        t.same(subs, expectedSubs)
+      })
+
+      s.broker.publish({
+        cmd: 'publish',
+        topic: 'hello',
+        payload: 'world'
+      })
+    })
+  })
+})
+
+// Catch invalid packet writeToStream errors
+test('return write errors to callback', function (t) {
+  t.plan(1)
+
+  const write = proxyquire('../lib/write.js', {
+    'mqtt-packet': {
+      writeToStream: () => {
+        throw Error('error')
+      }
+    }
+  })
+
+  const client = {
+    conn: {
+      writable: true
+    },
+    connecting: true
+  }
+
+  write(client, {}, function (err) {
+    t.equal(err.message, 'packet received not valid', 'should return the error to callback')
+  })
+})
+
+;[{ qos: 0, clean: false }, { qos: 0, clean: true }, { qos: 1, clean: false }, { qos: 1, clean: true }].forEach(function (ele) {
+  test('subscribe multipe topics in QoS ' + ele.qos + ' [clean=' + ele.clean + ']', function (t) {
+    t.plan(5)
+
+    const s = connect(setup(), { clean: ele.clean })
+    t.teardown(s.broker.close.bind(s.broker))
+
+    const expected = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      dup: false,
+      length: 12,
+      qos: 0,
+      retain: false
+    }
+    const subs = [
+      { topic: 'hello', qos: ele.qos, rh: undefined, rap: undefined, nl: undefined },
+      { topic: 'world', qos: ele.qos, rh: undefined, rap: undefined, nl: undefined }
+    ]
+    const expectedSubs = ele.clean ? null : subs
+
+    subscribeMultiple(t, s, subs, [ele.qos, ele.qos], function () {
+      s.outStream.on('data', function (packet) {
+        t.same(packet, expected, 'packet matches')
+      })
+
+      s.broker.persistence.subscriptionsByClient(s.client, function (_, saveSubs) {
+        t.same(saveSubs, expectedSubs)
+      })
+
+      s.broker.publish({
+        cmd: 'publish',
+        topic: 'hello',
+        payload: 'world'
+      })
+    })
+  })
+})
+
+test('does not die badly on connection error', function (t) {
+  t.plan(3)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.inStream.write({
+    cmd: 'subscribe',
+    messageId: 42,
+    subscriptions: [{
+      topic: 'hello',
+      qos: 0
+    }]
+  })
+
+  s.broker.on('clientError', function (client, err) {
+    t.ok(client, 'client is passed')
+    t.ok(err, 'err is passed')
+  })
+
+  s.outStream.on('data', function (packet) {
+    s.conn.destroy()
+    s.broker.publish({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world')
+    }, function () {
+      t.pass('calls the callback')
+    })
+  })
+})
+
+// Guarded in mqtt-packet
+test('subscribe should have messageId', function (t) {
+  t.plan(1)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.inStream.write({
+    cmd: 'subscribe',
+    subscriptions: [{
+      topic: 'hello',
+      qos: 0
+    }]
+  })
+  s.broker.on('connectionError', function (client, err) {
+    t.ok(err.message, 'Invalid messageId')
+  })
+})
+
+test('subscribe with messageId 0 should return suback', function (t) {
+  t.plan(1)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.inStream.write({
+    cmd: 'subscribe',
+    subscriptions: [{
+      topic: 'hello',
+      qos: 0
+    }],
+    messageId: 0
+  })
+  s.outStream.once('data', function (packet) {
+    t.same(packet, {
+      cmd: 'suback',
+      messageId: 0,
+      dup: false,
+      length: 3,
+      qos: 0,
+      retain: false,
+      granted: [
+        0
+      ]
+    }, 'packet matches')
+  })
+})
+
+test('unsubscribe', function (t) {
+  t.plan(5)
+
+  const s = noError(connect(setup()), t)
+  t.teardown(s.broker.close.bind(s.broker))
+
+  subscribe(t, s, 'hello', 0, function () {
+    s.inStream.write({
+      cmd: 'unsubscribe',
+      messageId: 43,
+      unsubscriptions: ['hello']
+    })
+
+    s.outStream.once('data', function (packet) {
+      t.same(packet, {
+        cmd: 'unsuback',
+        messageId: 43,
+        dup: false,
+        length: 2,
+        qos: 0,
+        retain: false
+      }, 'packet matches')
+
+      s.outStream.on('data', function (packet) {
+        t.fail('packet received')
+      })
+
+      s.broker.publish({
+        cmd: 'publish',
+        topic: 'hello',
+        payload: 'world'
+      }, function () {
+        t.pass('publish finished')
+      })
+    })
+  })
+})
+
+test('unsubscribe without subscribe', function (t) {
+  t.plan(1)
+
+  const s = noError(connect(setup()), t)
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.inStream.write({
+    cmd: 'unsubscribe',
+    messageId: 43,
+    unsubscriptions: ['hello']
+  })
+
+  s.outStream.once('data', function (packet) {
+    t.same(packet, {
+      cmd: 'unsuback',
+      messageId: 43,
+      dup: false,
+      length: 2,
+      qos: 0,
+      retain: false
+    }, 'packet matches')
+  })
+})
+
+test('unsubscribe on disconnect for a clean=true client', function (t) {
+  t.plan(6)
+
+  const opts = { clean: true }
+  const s = connect(setup(), opts)
+  t.teardown(s.broker.close.bind(s.broker))
+
+  subscribe(t, s, 'hello', 0, function () {
+    s.conn.destroy(null, function () {
+      t.pass('closed streams')
+    })
+    s.outStream.on('data', function () {
+      t.fail('should not receive any more messages')
+    })
+    s.broker.once('unsubscribe', function () {
+      t.pass('should emit unsubscribe')
+    })
+    s.broker.publish({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world')
+    }, function () {
+      t.pass('calls the callback')
+    })
+  })
+})
+
+test('unsubscribe on disconnect for a clean=false client', function (t) {
+  t.plan(5)
+
+  const opts = { clean: false }
+  const s = connect(setup(), opts)
+  t.teardown(s.broker.close.bind(s.broker))
+
+  subscribe(t, s, 'hello', 0, function () {
+    s.conn.destroy(null, function () {
+      t.pass('closed streams')
+    })
+    s.outStream.on('data', function () {
+      t.fail('should not receive any more messages')
+    })
+    s.broker.once('unsubscribe', function () {
+      t.fail('should not emit unsubscribe')
+    })
+    s.broker.publish({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world')
+    }, function () {
+      t.pass('calls the callback')
+    })
+  })
+})
+
+test('disconnect', function (t) {
+  t.plan(1)
+
+  const s = noError(connect(setup()), t)
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.on('clientDisconnect', function () {
+    t.pass('closed stream')
+  })
+
+  s.inStream.write({
+    cmd: 'disconnect'
+  })
+})
+
+test('disconnect client on wrong cmd', function (t) {
+  t.plan(1)
+
+  const s = noError(connect(setup()), t)
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.on('clientDisconnect', function () {
+    t.pass('closed stream')
+  })
+
+  s.broker.on('clientReady', function (c) {
+    // don't use stream write here because it will throw an error on mqtt_packet genetete
+    c._parser.emit('packet', { cmd: 'pippo' })
+  })
+})
+
+test('client closes', function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  const client = noError(connect(setup(broker), { clientId: 'abcde' }))
+  broker.on('clientReady', function () {
+    const brokerClient = broker.clients.abcde
+    t.equal(brokerClient.connected, true, 'client connected')
+    eos(client.conn, t.pass.bind(t, 'client closes'))
+    setImmediate(() => {
+      brokerClient.close(function () {
+        t.equal(broker.clients.abcde, undefined, 'client instance is removed')
+      })
+      t.equal(brokerClient.connected, false, 'client disconnected')
+      broker.close(function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+})
+
+test('broker closes', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  const client = noError(connect(setup(broker), {
+    clientId: 'abcde'
+  }, function () {
+    eos(client.conn, t.pass.bind(t, 'client closes'))
+    broker.close(function (err) {
+      t.error(err, 'no error')
+      t.ok(broker.closed)
+      t.equal(broker.clients.abcde, undefined, 'client instance is removed')
+    })
+  }))
+})
+
+test('broker closes gracefully', function (t) {
+  t.plan(7)
+
+  const broker = aedes()
+  const client1 = noError(connect(setup(broker), {
+  }, function () {
+    const client2 = noError(connect(setup(broker), {
+    }, function () {
+      t.equal(broker.connectedClients, 2, '2 connected clients')
+      eos(client1.conn, t.pass.bind(t, 'client1 closes'))
+      eos(client2.conn, t.pass.bind(t, 'client2 closes'))
+      broker.close(function (err) {
+        t.error(err, 'no error')
+        t.ok(broker.mq.closed, 'broker mq closes')
+        t.ok(broker.closed, 'broker closes')
+        t.equal(broker.connectedClients, 0, 'no connected clients')
+      })
+    }))
+  }))
+})
+
+test('testing other event', function (t) {
+  t.plan(1)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const client = setup(broker)
+
+  broker.on('connectionError', function (client, error) {
+    t.notOk(client.id, null)
+  })
+  client.conn.emit('error', 'Connect not yet arrived')
+})
+
+test('connect without a clientId for MQTT 3.1.1', function (t) {
+  t.plan(1)
+
+  const s = setup()
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    keepalive: 0
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 0,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'successful connack')
+  })
+})
+
+test('disconnect existing client with the same clientId', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const c1 = connect(setup(broker), {
+    clientId: 'abcde'
+  }, function () {
+    eos(c1.conn, function () {
+      t.pass('first client disconnected')
+    })
+
+    connect(setup(broker), {
+      clientId: 'abcde'
+    }, function () {
+      t.pass('second client connected')
+    })
+  })
+})
+
+test('disconnect if another broker connects the same clientId', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const c1 = connect(setup(broker), {
+    clientId: 'abcde'
+  }, function () {
+    eos(c1.conn, function () {
+      t.pass('disconnect first client')
+    })
+
+    broker.publish({
+      topic: '$SYS/anotherBroker/new/clients',
+      payload: Buffer.from('abcde')
+    }, function () {
+      t.pass('second client connects to another broker')
+    })
+  })
+})
+
+test('publish to $SYS/broker/new/clients', function (t) {
+  t.plan(1)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.mq.on('$SYS/' + broker.id + '/new/clients', function (packet, done) {
+    t.equal(packet.payload.toString(), 'abcde', 'clientId matches')
+    done()
+  })
+
+  connect(setup(broker), {
+    clientId: 'abcde'
+  })
+})
+
+test('publish to $SYS/broker/new/subsribers and $SYS/broker/new/unsubsribers', function (t) {
+  t.plan(7)
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const sub = {
+    topic: 'hello',
+    qos: 0
+  }
+
+  broker.mq.on('$SYS/' + broker.id + '/new/subscribes', function (packet, done) {
+    const payload = JSON.parse(packet.payload.toString())
+    t.equal(payload.clientId, 'abcde', 'clientId matches')
+    t.same(payload.subs, [sub], 'subscriptions matches')
+    done()
+  })
+
+  broker.mq.on('$SYS/' + broker.id + '/new/unsubscribes', function (packet, done) {
+    const payload = JSON.parse(packet.payload.toString())
+    t.equal(payload.clientId, 'abcde', 'clientId matches')
+    t.same(payload.subs, [sub.topic], 'unsubscriptions matches')
+    done()
+  })
+
+  const subscriber = connect(setup(broker), {
+    clean: false, clientId: 'abcde'
+  }, function () {
+    subscribe(t, subscriber, sub.topic, sub.qos, function () {
+      subscriber.inStream.write({
+        cmd: 'unsubscribe',
+        messageId: 43,
+        unsubscriptions: ['hello']
+      })
+    })
+  })
+})
+
+test('restore QoS 0 subscriptions not clean', function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    dup: false,
+    length: 12,
+    retain: false
+  }
+
+  let subscriber = connect(setup(broker), {
+    clean: false, clientId: 'abcde'
+  }, function () {
+    subscribe(t, subscriber, 'hello', 0, function () {
+      subscriber.inStream.end()
+
+      const publisher = connect(setup(broker), {
+      }, function () {
+        subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' }, function (connect) {
+          t.equal(connect.sessionPresent, true, 'session present is set to true')
+          publisher.inStream.write({
+            cmd: 'publish',
+            topic: 'hello',
+            payload: 'world',
+            qos: 0
+          })
+        })
+        subscriber.outStream.once('data', function (packet) {
+          t.same(packet, expected, 'packet must match')
+        })
+      })
+    })
+  })
+})
+
+test('do not restore QoS 0 subscriptions when clean', function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let subscriber = connect(setup(broker), {
+    clean: true, clientId: 'abcde'
+  }, function () {
+    subscribe(t, subscriber, 'hello', 0, function () {
+      subscriber.inStream.end()
+      subscriber.broker.persistence.subscriptionsByClient(broker.clients.abcde, function (_, subs, client) {
+        t.equal(subs, null, 'no previous subscriptions restored')
+      })
+      const publisher = connect(setup(broker), {
+      }, function () {
+        subscriber = connect(setup(broker), {
+          clean: true, clientId: 'abcde'
+        }, function (connect) {
+          t.equal(connect.sessionPresent, false, 'session present is set to false')
+          publisher.inStream.write({
+            cmd: 'publish',
+            topic: 'hello',
+            payload: 'world',
+            qos: 0
+          })
+        })
+        subscriber.outStream.once('data', function (packet) {
+          t.fail('packet received')
+        })
+      })
+    })
+  })
+})
+
+test('double sub does not double deliver', function (t) {
+  t.plan(7)
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    dup: false,
+    length: 12,
+    qos: 0,
+    retain: false
+  }
+  const s = connect(setup(), {
+  }, function () {
+    subscribe(t, s, 'hello', 0, function () {
+      subscribe(t, s, 'hello', 0, function () {
+        s.outStream.once('data', function (packet) {
+          t.same(packet, expected, 'packet matches')
+          s.outStream.on('data', function () {
+            t.fail('double deliver')
+          })
+        })
+
+        s.broker.publish({
+          cmd: 'publish',
+          topic: 'hello',
+          payload: 'world'
+        })
+      })
+    })
+  })
+  t.teardown(s.broker.close.bind(s.broker))
+})
+
+test('overlapping sub does not double deliver', function (t) {
+  t.plan(7)
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    dup: false,
+    length: 12,
+    qos: 0,
+    retain: false
+  }
+  const s = connect(setup(), {
+  }, function () {
+    subscribe(t, s, 'hello', 0, function () {
+      subscribe(t, s, 'hello/#', 0, function () {
+        s.outStream.once('data', function (packet) {
+          t.same(packet, expected, 'packet matches')
+          s.outStream.on('data', function () {
+            t.fail('double deliver')
+          })
+        })
+
+        s.broker.publish({
+          cmd: 'publish',
+          topic: 'hello',
+          payload: 'world'
+        })
+      })
+    })
+  })
+  t.teardown(s.broker.close.bind(s.broker))
+})
+
+test('clear drain', function (t) {
+  t.plan(4)
+
+  const s = connect(setup(), {
+  }, function () {
+    subscribe(t, s, 'hello', 0, function () {
+      // fake a busy socket
+      s.conn.write = function (chunk, enc, cb) {
+        return false
+      }
+
+      s.broker.publish({
+        cmd: 'publish',
+        topic: 'hello',
+        payload: 'world'
+      }, function () {
+        t.pass('callback called')
+      })
+
+      s.conn.destroy()
+    })
+  })
+
+  t.teardown(s.broker.close.bind(s.broker))
+})
+
+test('id option', function (t) {
+  t.plan(2)
+
+  const broker1 = aedes()
+
+  setup(broker1).conn.destroy()
+  t.ok(broker1.id, 'broker gets random id when id option not set')
+
+  const broker2 = aedes({ id: 'abc' })
+  setup(broker2).conn.destroy()
+  t.equal(broker2.id, 'abc', 'broker id equals id option when set')
+
+  t.teardown(() => {
+    broker1.close()
+    broker2.close()
+  })
+})
+
+test('not duplicate client close when client error occurs', function (t) {
+  t.plan(1)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  connect(setup(broker))
+  broker.on('client', function (client) {
+    client.conn.on('drain', () => {
+      t.pass('client closed ok')
+    })
+    client.close()
+    // add back to test if there is duplicated close() call
+    client.conn.on('drain', () => {
+      t.fail('double client close calls')
+    })
+  })
+})
+
+test('not duplicate client close when double close() called', function (t) {
+  t.plan(1)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  connect(setup(broker))
+  broker.on('clientReady', function (client) {
+    client.conn.on('drain', () => {
+      t.pass('client closed ok')
+    })
+    client.close()
+    // add back to test if there is duplicated close() call
+    client.conn.on('drain', () => {
+      t.fail('double execute client close function')
+    })
+    client.close()
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/test/bridge.js b/mqtt-backend/node_modules/aedes/test/bridge.js
new file mode 100644
index 0000000..7927937
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/bridge.js
@@ -0,0 +1,57 @@
+'use strict'
+
+const { test } = require('tap')
+const { setup, connect, subscribe } = require('./helper')
+
+for (const qos of [0, 1, 2]) {
+  const packet = {
+    qos,
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world'
+  }
+
+  if (qos > 0) packet.messageId = 42
+
+  test('normal client sends a publish message and shall receive it back, qos = ' + qos, function (t) {
+    const s = connect(setup())
+    t.teardown(s.broker.close.bind(s.broker))
+
+    const handle = setTimeout(() => {
+      t.fail('did not receive packet back')
+      t.end()
+    }, 1000)
+
+    subscribe(t, s, 'hello', qos, function () {
+      s.outStream.on('data', (packet) => {
+        if (packet.cmd === 'publish') {
+          clearTimeout(handle)
+          t.end()
+        } else if (packet.cmd === 'pubrec') {
+          s.inStream.write({ cmd: 'pubrel', messageId: 42 })
+        }
+      })
+
+      s.inStream.write(packet)
+    })
+  })
+
+  test('bridge client sends a publish message but shall not receive it back, qos = ' + qos, function (t) {
+    // protocolVersion 128 + 4 means mqtt 3.1.1 with bridgeMode enabled
+    // https://github.com/mqttjs/mqtt-packet/blob/7f7c2ed8bcb4b2c582851d120a94e0b4a731f661/parser.js#L171
+    const s = connect(setup(), { clientId: 'my-client-bridge-1', protocolVersion: 128 + 4 })
+    t.teardown(s.broker.close.bind(s.broker))
+
+    const handle = setTimeout(() => t.end(), 1000)
+
+    subscribe(t, s, 'hello', qos, function () {
+      s.outStream.on('data', function () {
+        clearTimeout(handle)
+        t.fail('should not receive packet back')
+        t.end()
+      })
+
+      s.inStream.write(packet)
+    })
+  })
+}
diff --git a/mqtt-backend/node_modules/aedes/test/client-pub-sub.js b/mqtt-backend/node_modules/aedes/test/client-pub-sub.js
new file mode 100644
index 0000000..9f82932
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/client-pub-sub.js
@@ -0,0 +1,1027 @@
+'use strict'
+
+const { test } = require('tap')
+const { setup, connect, subscribe, noError } = require('./helper')
+const aedes = require('../')
+
+test('publish direct to a single client QoS 0', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    dup: false,
+    length: 12,
+    qos: 0,
+    retain: false
+  }
+
+  broker.on('client', function (client) {
+    client.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 0
+    }, function (err) {
+      t.error(err, 'no error')
+    })
+  })
+
+  const s = connect(setup(broker))
+
+  s.outStream.once('data', function (packet) {
+    t.same(packet, expected, 'packet matches')
+  })
+})
+
+test('publish direct to a single client throws error', function (t) {
+  t.plan(1)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.persistence.outgoingEnqueue = function (sub, packet, done) {
+    done(new Error('Throws error'))
+  }
+
+  broker.on('client', function (client) {
+    client.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      retain: false
+    }, function (err) {
+      t.pass('Throws error', err.message, 'throws error')
+    })
+  })
+
+  connect(setup(broker), { clean: false })
+})
+
+test('publish direct to a single client throws error 2', function (t) {
+  t.plan(1)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.persistence.outgoingUpdate = function (client, packet, done) {
+    done(new Error('Throws error'), client, packet)
+  }
+
+  broker.on('client', function (client) {
+    client.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1,
+      retain: false
+    }, () => {})
+
+    client.once('error', function (err) {
+      t.pass('Throws error', err.message, 'throws error')
+    })
+  })
+
+  connect(setup(broker), { clean: false })
+})
+
+test('publish direct to a single client QoS 1', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    dup: false,
+    length: 14,
+    qos: 1,
+    retain: false
+  }
+
+  broker.on('client', function (client) {
+    client.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1
+    }, function (err) {
+      t.error(err, 'no error')
+    })
+  })
+
+  const s = connect(setup(broker))
+
+  s.outStream.once('data', function (packet) {
+    expected.messageId = packet.messageId
+    t.same(packet, expected, 'packet matches')
+    s.inStream.write({
+      cmd: 'puback',
+      messageId: packet.messageId
+    })
+  })
+})
+
+test('publish QoS 2 throws error in pubrel', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = connect(setup(broker))
+
+  broker.on('clientError', function (c, err) {
+    t.pass('throws error')
+  })
+
+  s.outStream.on('data', function (packet) {
+    if (packet.cmd === 'publish') {
+      s.inStream.write({
+        cmd: 'pubrec',
+        messageId: packet.messageId
+      })
+      s.broker.persistence.outgoingUpdate = function (client, pubrel, cb) {
+        cb(new Error('error'))
+      }
+    }
+  })
+
+  broker.on('clientReady', function (client) {
+    client.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2
+    }, function (err) {
+      t.error(err, 'no error')
+    })
+  })
+})
+
+test('publish direct to a single client QoS 2', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let publishCount = 0
+  let nonPublishCount = 0
+
+  broker.on('clientReady', function (client) {
+    client.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2
+    }, function (err) {
+      t.error(err, 'no error')
+    })
+    client.on('error', function (err) {
+      t.error(err)
+    })
+  })
+
+  const s = connect(setup(broker))
+
+  s.inStream.on('close', () => {
+    t.equal(publishCount, 1)
+    t.equal(nonPublishCount, 1)
+  })
+
+  s.outStream.on('data', function (packet) {
+    if (packet.cmd === 'publish') {
+      publishCount++
+      s.inStream.write({
+        cmd: 'pubrec',
+        messageId: packet.messageId
+      })
+    } else {
+      nonPublishCount++
+      s.inStream.write({
+        cmd: 'pubcomp',
+        messageId: packet.messageId
+      })
+      s.inStream.destroy()
+    }
+  })
+})
+
+test('emit a `ack` event on PUBACK for QoS 1 [clean=false]', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    retain: false,
+    dup: false
+  }
+
+  broker.on('clientReady', function (client) {
+    client.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1
+    }, function (err) {
+      t.error(err, 'no error')
+    })
+  })
+
+  broker.once('ack', function (packet, client) {
+    expected.brokerId = packet.brokerId
+    expected.brokerCounter = packet.brokerCounter
+    expected.messageId = packet.messageId
+    t.same(packet, expected, 'ack packet is origianl packet')
+    t.pass('got the ack event')
+  })
+
+  const s = connect(setup(broker), { clean: false })
+
+  s.outStream.once('data', function (packet) {
+    s.inStream.write({
+      cmd: 'puback',
+      messageId: packet.messageId
+    })
+  })
+})
+
+test('emit a `ack` event on PUBACK for QoS 1 [clean=true]', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('clientReady', function (client) {
+    client.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1
+    }, function (err) {
+      t.error(err, 'no error')
+    })
+  })
+
+  broker.once('ack', function (packet, client) {
+    t.equal(packet, undefined, 'ack packet is undefined')
+    t.pass('got the ack event')
+  })
+
+  const s = connect(setup(broker), { clean: true })
+
+  s.outStream.once('data', function (packet) {
+    s.inStream.write({
+      cmd: 'puback',
+      messageId: packet.messageId
+    })
+  })
+})
+
+test('emit a `ack` event on PUBCOMP for QoS 2 [clean=false]', function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let messageId
+  let clientId
+
+  broker.on('clientReady', function (client) {
+    clientId = client.id
+    client.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2
+    }, function (err) {
+      t.error(err, 'no error')
+    })
+  })
+
+  broker.once('ack', function (packet, client) {
+    t.equal(client.id, clientId)
+    t.equal(packet.messageId, messageId)
+    t.equal(packet.cmd, 'pubrel', 'ack packet is purel')
+    t.pass('got the ack event')
+  })
+
+  const s = connect(setup(broker), { clean: false })
+
+  s.outStream.on('data', function (packet) {
+    if (packet.cmd === 'publish') {
+      s.inStream.write({
+        cmd: 'pubrec',
+        messageId: packet.messageId
+      })
+    } else {
+      messageId = packet.messageId
+      s.inStream.write({
+        cmd: 'pubcomp',
+        messageId: packet.messageId
+      })
+    }
+  })
+})
+
+test('emit a `ack` event on PUBCOMP for QoS 2 [clean=true]', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('clientReady', function (client) {
+    client.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2
+    }, function (err) {
+      t.error(err, 'no error')
+    })
+  })
+
+  broker.once('ack', function (packet, client) {
+    t.equal(packet, undefined, 'ack packet is undefined')
+    t.pass('got the ack event')
+  })
+
+  const s = connect(setup(broker), { clean: true })
+
+  s.outStream.on('data', function (packet) {
+    if (packet.cmd === 'publish') {
+      s.inStream.write({
+        cmd: 'pubrec',
+        messageId: packet.messageId
+      })
+    } else {
+      s.inStream.write({
+        cmd: 'pubcomp',
+        messageId: packet.messageId
+      })
+    }
+  })
+})
+
+test('offline message support for direct publish', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    dup: false,
+    length: 14,
+    qos: 1,
+    retain: false
+  }
+  const opts = {
+    clean: false,
+    clientId: 'abcde'
+  }
+
+  broker.once('client', function (client) {
+    client.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 1
+    }, function (err) {
+      t.error(err, 'no error')
+    })
+  })
+
+  let s = connect(setup(broker), opts)
+
+  s.outStream.once('data', function (packet) {
+    s = connect(setup(broker), opts)
+
+    s.outStream.once('data', function (packet) {
+      s = connect(setup(broker), opts)
+      s.inStream.write({
+        cmd: 'puback',
+        messageId: packet.messageId
+      })
+      delete packet.messageId
+      t.same(packet, expected, 'packet must match')
+    })
+  })
+})
+
+test('subscribe a client programmatically', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    dup: false,
+    length: 12,
+    qos: 0,
+    retain: false
+  }
+
+  broker.on('client', function (client) {
+    client.subscribe({
+      topic: 'hello',
+      qos: 0
+    }, function (err) {
+      t.error(err, 'no error')
+
+      broker.publish({
+        topic: 'hello',
+        payload: Buffer.from('world'),
+        qos: 0
+      }, function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+
+  const s = connect(setup(broker))
+
+  s.outStream.once('data', function (packet) {
+    t.same(packet, expected, 'packet matches')
+  })
+})
+
+test('subscribe a client programmatically clears retain', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    dup: false,
+    length: 12,
+    qos: 0,
+    retain: false
+  }
+
+  broker.on('client', function (client) {
+    client.subscribe({
+      topic: 'hello',
+      qos: 0
+    }, function (err) {
+      t.error(err, 'no error')
+
+      broker.publish({
+        topic: 'hello',
+        payload: Buffer.from('world'),
+        qos: 0,
+        retain: true
+      }, function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+
+  const s = connect(setup(broker))
+
+  s.outStream.once('data', function (packet) {
+    t.same(packet, expected, 'packet matches')
+  })
+})
+
+test('subscribe a bridge programmatically keeps retain', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    dup: false,
+    length: 12,
+    qos: 0,
+    retain: true
+  }
+
+  broker.on('client', function (client) {
+    client.subscribe({
+      topic: 'hello',
+      qos: 0,
+      rap: true
+    }, function (err) {
+      t.error(err, 'no error')
+
+      broker.publish({
+        topic: 'hello',
+        payload: Buffer.from('world'),
+        qos: 0,
+        retain: true
+      }, function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+
+  const s = connect(setup(broker))
+
+  s.outStream.once('data', function (packet) {
+    t.same(packet, expected, 'packet matches')
+  })
+})
+
+test('subscribe throws error when QoS > 0', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('clientReady', function (client) {
+    client.subscribe({
+      topic: 'hello',
+      qos: 1
+    }, function (err) {
+      t.error(err, 'no error')
+
+      // makes writeQos throw error
+      client.connected = false
+      client.connecting = false
+
+      broker.publish({
+        topic: 'hello',
+        payload: Buffer.from('world'),
+        qos: 1
+      }, function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+
+  broker.on('clientError', function (client, error) {
+    t.equal(error.message, 'connection closed', 'should throw clientError')
+  })
+
+  connect(setup(broker))
+})
+
+test('subscribe a client programmatically - wildcard', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello/world/1',
+    payload: Buffer.from('world'),
+    dup: false,
+    length: 20,
+    qos: 0,
+    retain: false
+  }
+
+  broker.on('clientReady', function (client) {
+    client.subscribe({
+      topic: '+/world/1',
+      qos: 0
+    }, function (err) {
+      t.error(err, 'no error')
+
+      broker.publish({
+        topic: 'hello/world/1',
+        payload: Buffer.from('world'),
+        qos: 0
+      }, function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+
+  const s = connect(setup(broker))
+
+  s.outStream.once('data', function (packet) {
+    t.same(packet, expected, 'packet matches')
+  })
+})
+
+test('unsubscribe a client', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('client', function (client) {
+    client.subscribe({
+      topic: 'hello',
+      qos: 0
+    }, function (err) {
+      t.error(err, 'no error')
+      client.unsubscribe([{
+        topic: 'hello',
+        qos: 0
+      }], function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+  connect(setup(broker))
+})
+
+test('unsubscribe should not call removeSubscriptions when [clean=true]', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.persistence.removeSubscriptions = function (client, subs, cb) {
+    cb(Error('remove subscription is called'))
+  }
+
+  broker.on('client', function (client) {
+    client.subscribe({
+      topic: 'hello',
+      qos: 1
+    }, function (err) {
+      t.error(err, 'no error')
+      client.unsubscribe({
+        unsubscriptions: [{
+          topic: 'hello',
+          qos: 1
+        }],
+        messageId: 42
+      }, function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+  connect(setup(broker), { clean: true })
+})
+
+test('unsubscribe throws error', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('client', function (client) {
+    client.subscribe({
+      topic: 'hello',
+      qos: 0
+    }, function (err) {
+      t.error(err, 'no error')
+      broker.unsubscribe = function (topic, func, done) {
+        done(new Error('error'))
+      }
+      client.unsubscribe({
+        topic: 'hello',
+        qos: 0
+      }, function () {
+        t.pass('throws error')
+      })
+    })
+  })
+  connect(setup(broker))
+})
+
+test('unsubscribe throws error 2', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('client', function (client) {
+    client.subscribe({
+      topic: 'hello',
+      qos: 2
+    }, function (err) {
+      t.error(err, 'no error')
+      broker.persistence.removeSubscriptions = function (client, unsubscriptions, done) {
+        done(new Error('error'))
+      }
+      client.unsubscribe({
+        unsubscriptions: [{
+          topic: 'hello',
+          qos: 2
+        }],
+        messageId: 42
+      }, function () {
+        t.pass('throws error')
+      })
+    })
+  })
+  connect(setup(broker))
+})
+
+test('subscribe a client programmatically multiple topics', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    dup: false,
+    length: 12,
+    qos: 0,
+    retain: false
+  }
+
+  broker.on('client', function (client) {
+    client.subscribe([{
+      topic: 'hello',
+      qos: 0
+    }, {
+      topic: 'aaa',
+      qos: 0
+    }], function (err) {
+      t.error(err, 'no error')
+
+      broker.publish({
+        topic: 'hello',
+        payload: Buffer.from('world'),
+        qos: 0
+      }, function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+
+  const s = connect(setup(broker))
+
+  s.outStream.once('data', function (packet) {
+    t.same(packet, expected, 'packet matches')
+  })
+})
+
+test('subscribe a client programmatically with full packet', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    dup: false,
+    length: 12,
+    qos: 0,
+    retain: false
+  }
+
+  broker.on('client', function (client) {
+    client.subscribe({
+      subscriptions: [{
+        topic: 'hello',
+        qos: 0
+      }, {
+        topic: 'aaa',
+        qos: 0
+      }]
+    }, function (err) {
+      t.error(err, 'no error')
+
+      broker.publish({
+        topic: 'hello',
+        payload: Buffer.from('world'),
+        qos: 0
+      }, function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+
+  const s = connect(setup(broker))
+
+  s.outStream.once('data', function (packet) {
+    t.same(packet, expected, 'packet matches')
+  })
+})
+
+test('get message when client connects', function (t) {
+  t.plan(2)
+
+  const client1 = 'gav'
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('client', function (client) {
+    client.subscribe({
+      subscriptions: [{
+        topic: '$SYS/+/new/clients',
+        qos: 0
+      }]
+    }, function (err) {
+      t.error(err, 'no error')
+    })
+  })
+
+  const s1 = connect(setup(broker), { clientId: client1 })
+
+  s1.outStream.on('data', function (packet) {
+    t.equal(client1, packet.payload.toString())
+  })
+})
+
+test('get message when client disconnects', function (t) {
+  t.plan(2)
+
+  const client1 = 'gav'
+  const client2 = 'friend'
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('client', function (client) {
+    if (client.id === client1) {
+      client.subscribe({
+        subscriptions: [{
+          topic: '$SYS/+/disconnect/clients',
+          qos: 0
+        }]
+      }, function (err) {
+        t.error(err, 'no error')
+      })
+    } else {
+      client.close()
+    }
+  })
+
+  const s1 = connect(setup(broker), { clientId: client1 })
+  connect(setup(broker), { clientId: client2 })
+
+  s1.outStream.on('data', function (packet) {
+    t.equal(client2, packet.payload.toString())
+  })
+})
+
+test('should not receive a message on negated subscription', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.authorizeSubscribe = function (client, sub, callback) {
+    callback(null, null)
+  }
+
+  broker.on('client', function (client) {
+    broker.publish({
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 0,
+      retain: true
+    }, function (err) {
+      t.error(err, 'no error')
+      client.subscribe([{
+        topic: 'hello',
+        qos: 0
+      },
+      {
+        topic: 'hello',
+        qos: 0
+      }], function (err) {
+        t.error(err, 'no error')
+      })
+    })
+  })
+
+  broker.on('subscribe', function (subs) {
+    t.pass(subs.length, 1, 'Should dedupe subs')
+    t.pass(subs[0].qos, 128, 'Qos should be 128 (Fail)')
+  })
+
+  const s = connect(setup(broker))
+  s.outStream.once('data', function (packet) {
+    t.fail('Packet should not be received')
+  })
+})
+
+test('programmatically add custom subscribe', function (t) {
+  t.plan(6)
+
+  const broker = aedes({ clientId: 'my-client-xyz-7' })
+  t.teardown(broker.close.bind(broker))
+
+  const s = connect(setup(broker), { clientId: 'my-client-xyz-7' })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: false,
+    length: 12,
+    dup: false
+  }
+  const deliverP = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: false,
+    dup: false,
+    clientId: 'my-client-xyz-7'
+  }
+  subscribe(t, s, 'hello', 0, function () {
+    broker.subscribe('hello', deliver, function () {
+      t.pass('subscribed')
+    })
+    s.outStream.on('data', function (packet) {
+      t.same(packet, expected, 'packet matches')
+    })
+    s.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 0,
+      messageId: 42
+    })
+  })
+  function deliver (packet, cb) {
+    deliverP.brokerId = s.broker.id
+    deliverP.brokerCounter = s.broker.counter
+    t.same(packet, deliverP, 'packet matches')
+    cb()
+  }
+})
+
+test('custom function in broker.subscribe', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    retain: false,
+    dup: false,
+    messageId: undefined,
+    clientId: 'my-client-xyz-6'
+  }
+  connect(s, { clientId: 'my-client-xyz-6' }, function () {
+    broker.subscribe('hello', deliver, function () {
+      t.pass('subscribed')
+    })
+    s.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      messageId: 42
+    })
+  })
+  broker.on('publish', function (packet, client) {
+    if (client) {
+      t.equal(packet.topic, 'hello')
+      t.equal(packet.messageId, 42)
+    }
+  })
+  function deliver (packet, cb) {
+    expected.brokerId = s.broker.id
+    expected.brokerCounter = s.broker.counter
+    t.same(packet, expected, 'packet matches')
+    cb()
+  }
+})
+
+test('custom function in broker.unsubscribe', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = noError(setup(broker))
+  connect(s, {}, function () {
+    broker.subscribe('hello', deliver, function () {
+      t.pass('subscribed')
+      broker.unsubscribe('hello', deliver, function () {
+        t.pass('unsubscribe')
+        s.inStream.write({
+          cmd: 'publish',
+          topic: 'hello',
+          payload: 'word',
+          qos: 1,
+          messageId: 42
+        })
+      })
+    })
+  })
+  broker.on('publish', function (packet, client) {
+    if (client) {
+      t.pass('publish')
+    }
+  })
+  function deliver (packet, cb) {
+    t.fail('should not be called')
+    cb()
+  }
+})
diff --git a/mqtt-backend/node_modules/aedes/test/close_socket_by_other_party.js b/mqtt-backend/node_modules/aedes/test/close_socket_by_other_party.js
new file mode 100644
index 0000000..18aa18c
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/close_socket_by_other_party.js
@@ -0,0 +1,177 @@
+'use strict'
+
+const { test } = require('tap')
+const EventEmitter = require('events')
+const { setup, connect, subscribe } = require('./helper')
+const aedes = require('../')
+
+test('aedes is closed before client authenticate returns', function (t) {
+  t.plan(1)
+
+  const evt = new EventEmitter()
+  const broker = aedes({
+    authenticate: (client, username, password, done) => {
+      evt.emit('AuthenticateBegin', client)
+      setTimeout(function () {
+        done(null, true)
+      }, 2000)
+    }
+  })
+
+  broker.on('client', function (client) {
+    t.fail('should no client registration')
+  })
+  broker.on('connackSent', function () {
+    t.fail('should no connack be sent')
+  })
+  broker.on('clientError', function (client, err) {
+    t.error(err)
+  })
+
+  connect(setup(broker))
+
+  evt.on('AuthenticateBegin', function (client) {
+    t.equal(broker.connectedClients, 0)
+    broker.close()
+  })
+})
+
+test('client is closed before authenticate returns', function (t) {
+  t.plan(1)
+
+  const evt = new EventEmitter()
+  const broker = aedes({
+    authenticate: async (client, username, password, done) => {
+      evt.emit('AuthenticateBegin', client)
+      setTimeout(function () {
+        done(null, true)
+      }, 2000)
+    }
+  })
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('client', function (client) {
+    t.fail('should no client registration')
+  })
+  broker.on('connackSent', function () {
+    t.fail('should no connack be sent')
+  })
+  broker.on('clientError', function (client, err) {
+    t.error(err)
+  })
+
+  connect(setup(broker))
+
+  evt.on('AuthenticateBegin', function (client) {
+    t.equal(broker.connectedClients, 0)
+    client.close()
+  })
+})
+
+test('client is closed before authorizePublish returns', function (t) {
+  t.plan(3)
+
+  const evt = new EventEmitter()
+  const broker = aedes({
+    authorizePublish: (client, packet, done) => {
+      evt.emit('AuthorizePublishBegin', client)
+      // simulate latency writing to persistent store.
+      setTimeout(function () {
+        done()
+        evt.emit('AuthorizePublishEnd', client)
+      }, 2000)
+    }
+  })
+
+  broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'connection closed')
+  })
+
+  const s = connect(setup(broker))
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 1,
+    messageId: 10,
+    retain: false
+  })
+
+  evt.on('AuthorizePublishBegin', function (client) {
+    t.equal(broker.connectedClients, 1)
+    client.close()
+  })
+  evt.on('AuthorizePublishEnd', function (client) {
+    t.equal(broker.connectedClients, 0)
+    broker.close()
+  })
+})
+
+test('close client when its socket is closed', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const subscriber = connect(setup(broker))
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.inStream.end()
+    subscriber.conn.on('close', function () {
+      t.equal(broker.connectedClients, 0, 'no connected client')
+    })
+  })
+})
+
+test('multiple clients subscribe same topic, and all clients still receive message except the closed one', function (t) {
+  t.plan(5)
+
+  const mqtt = require('mqtt')
+  const broker = aedes()
+
+  let client2
+
+  t.teardown(() => {
+    client2.end()
+    broker.close()
+    server.close()
+  })
+
+  const server = require('net').createServer(broker.handle)
+  const port = 1883
+  server.listen(port)
+  broker.on('clientError', function (client, err) {
+    t.error(err)
+  })
+
+  const _sameTopic = 'hello'
+
+  // client 1
+  const client1 = mqtt.connect('mqtt://localhost', { clientId: 'client1', resubscribe: false, reconnectPeriod: -1 })
+  client1.on('message', () => {
+    t.fail('client1 receives message')
+  })
+
+  client1.subscribe(_sameTopic, { qos: 0, retain: false }, () => {
+    t.pass('client1 sub callback')
+    // stimulate closed socket by users
+    client1.stream.destroy()
+
+    // client 2
+    client2 = mqtt.connect('mqtt://localhost', { clientId: 'client2', resubscribe: false })
+    client2.on('message', () => {
+      t.pass('client2 receives message')
+      t.equal(broker.connectedClients, 1)
+    })
+    client2.subscribe(_sameTopic, { qos: 0, retain: false }, () => {
+      t.pass('client2 sub callback')
+
+      // pubClient
+      const pubClient = mqtt.connect('mqtt://localhost', { clientId: 'pubClient' })
+      pubClient.publish(_sameTopic, 'world', { qos: 0, retain: false }, () => {
+        t.pass('pubClient publish event')
+        pubClient.end()
+      })
+    })
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/test/connect.js b/mqtt-backend/node_modules/aedes/test/connect.js
new file mode 100644
index 0000000..fb6de7f
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/connect.js
@@ -0,0 +1,762 @@
+'use strict'
+
+const { test } = require('tap')
+const http = require('http')
+const ws = require('websocket-stream')
+const mqtt = require('mqtt')
+const { setup, connect, delay } = require('./helper')
+const aedes = require('../')
+
+;[{ ver: 3, id: 'MQIsdp' }, { ver: 4, id: 'MQTT' }].forEach(function (ele) {
+  test('connect and connack (minimal)', function (t) {
+    t.plan(2)
+
+    const s = setup()
+    t.teardown(s.broker.close.bind(s.broker))
+
+    s.inStream.write({
+      cmd: 'connect',
+      protocolId: ele.id,
+      protocolVersion: ele.ver,
+      clean: true,
+      clientId: 'my-client',
+      keepalive: 0
+    })
+
+    s.outStream.on('data', function (packet) {
+      t.same(packet, {
+        cmd: 'connack',
+        returnCode: 0,
+        length: 2,
+        qos: 0,
+        retain: false,
+        dup: false,
+        topic: null,
+        payload: null,
+        sessionPresent: false
+      }, 'successful connack')
+      t.equal(s.client.version, ele.ver)
+    })
+  })
+})
+
+// [MQTT-3.1.2-2]
+test('reject client requested for unacceptable protocol version', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQIsdp',
+    protocolVersion: 5,
+    clean: true,
+    clientId: 'my-client',
+    keepalive: 0
+  })
+  s.outStream.on('data', function (packet) {
+    t.equal(packet.cmd, 'connack')
+    t.equal(packet.returnCode, 1, 'unacceptable protocol version')
+    t.equal(broker.connectedClients, 0)
+  })
+  broker.on('clientError', function (client, err) {
+    t.fail('should not raise clientError error')
+  })
+  broker.on('connectionError', function (client, err) {
+    t.equal(err.message, 'unacceptable protocol version')
+  })
+})
+
+// [MQTT-3.1.2-1], Guarded in mqtt-packet
+test('reject client requested for unsupported protocol version', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 2,
+    clean: true,
+    clientId: 'my-client',
+    keepalive: 0
+  })
+  s.outStream.on('data', function (packet) {
+    t.fail('no data sent')
+  })
+  broker.on('connectionError', function (client, err) {
+    t.equal(client.version, null)
+    t.equal(err.message, 'Invalid protocol version')
+    t.equal(broker.connectedClients, 0)
+  })
+})
+
+test('reject clients that exceed the keepalive limit', function (t) {
+  t.plan(3)
+
+  const broker = aedes({
+    keepaliveLimit: 100
+  })
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  s.inStream.write({
+    cmd: 'connect',
+    keepalive: 150
+  })
+  s.outStream.on('data', function (packet) {
+    console.log(packet)
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 6,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'unsuccessful connack, keep alive limit exceeded')
+  })
+  broker.on('connectionError', function (client, err) {
+    t.equal(err.message, 'keep alive limit exceeded')
+    t.equal(broker.connectedClients, 0)
+  })
+})
+
+// Guarded in mqtt-packet
+test('reject clients with no clientId running on MQTT 3.1.0', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQIsdp',
+    protocolVersion: 3,
+    clean: true,
+    keepalive: 0
+  })
+  s.outStream.on('data', function (packet) {
+    t.fail('no data sent')
+  })
+  broker.on('connectionError', function (client, err) {
+    t.equal(client.version, null)
+    t.equal(err.message, 'clientId must be supplied before 3.1.1')
+    t.equal(broker.connectedClients, 0)
+  })
+})
+
+// [MQTT-3.1.3-7], Guarded in mqtt-packet
+test('reject clients without clientid and clean=false on MQTT 3.1.1', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: false,
+    clientId: '',
+    keepalive: 0
+  })
+  s.outStream.on('data', function (packet) {
+    t.fail('no data sent')
+  })
+  broker.on('connectionError', function (client, err) {
+    t.equal(err.message, 'clientId must be given if cleanSession set to 0')
+    t.equal(broker.connectedClients, 0)
+  })
+})
+
+test('clients without clientid and clean=true on MQTT 3.1.1 will get a generated clientId', function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    keepalive: 0
+  })
+  s.outStream.on('data', function (packet) {
+    t.equal(packet.cmd, 'connack')
+    t.equal(packet.returnCode, 0)
+    t.equal(broker.connectedClients, 1)
+    t.equal(s.client.version, 4)
+  })
+  broker.on('connectionError', function (client, err) {
+    t.error(err, 'no error')
+  })
+  broker.on('client', function (client) {
+    t.ok(client.id.startsWith('aedes_'))
+  })
+})
+
+test('client connect error while fetching subscriptions', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  broker.persistence.subscriptionsByClient = function (c, cb) {
+    cb(new Error('error'), [], c)
+  }
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: false,
+    clientId: 'my-client',
+    keepalive: 0
+  })
+
+  broker.on('clientError', function (client, err) {
+    t.equal(client.version, 4)
+    t.pass('throws error')
+  })
+})
+
+test('client connect clear outgoing', function (t) {
+  t.plan(1)
+
+  const clientId = 'abcde'
+  const brokerId = 'pippo'
+
+  const broker = aedes({ id: brokerId })
+  t.teardown(broker.close.bind(broker))
+
+  const subs = [{ clientId }]
+  const packet = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    brokerId,
+    brokerCounter: 2,
+    retain: true,
+    messageId: 42,
+    dup: false
+  }
+
+  broker.persistence.outgoingEnqueueCombi(subs, packet, function () {
+    const s = setup(broker)
+
+    s.inStream.write({
+      cmd: 'connect',
+      protocolId: 'MQTT',
+      protocolVersion: 4,
+      clean: true,
+      clientId,
+      keepalive: 0
+    })
+
+    broker.on('clientReady', function (client) {
+      broker.persistence.outgoingUpdate(client, packet, function (err) {
+        t.equal('no such packet', err.message, 'packet not found')
+      })
+    })
+  })
+})
+
+test('clients with zero-byte clientid and clean=true on MQTT 3.1.1 will get a generated clientId', function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: '',
+    keepalive: 0
+  })
+  s.outStream.on('data', function (packet) {
+    t.equal(packet.cmd, 'connack')
+    t.equal(packet.returnCode, 0)
+    t.equal(broker.connectedClients, 1)
+    t.equal(s.client.version, 4)
+  })
+  broker.on('connectionError', function (client, err) {
+    t.error(err, 'no error')
+  })
+  broker.on('client', function (client) {
+    t.ok(client.id.startsWith('aedes_'))
+  })
+})
+
+// [MQTT-3.1.3-7]
+test('reject clients with > 23 clientId length in MQTT 3.1.0', function (t) {
+  t.plan(7)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  const conn = s.client.conn
+  const end = conn.end
+
+  conn.end = function () {
+    t.fail('should not call `conn.end()`')
+    end()
+  }
+
+  function drain () {
+    t.pass('should empty connection request queue')
+  }
+
+  conn._writableState.getBuffer = () => [{ callback: drain }, { callback: drain }]
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQIsdp',
+    protocolVersion: 3,
+    clean: true,
+    clientId: 'abcdefghijklmnopqrstuvwxyz',
+    keepalive: 0
+  })
+  s.outStream.on('data', function (packet) {
+    t.equal(packet.cmd, 'connack')
+    t.equal(packet.returnCode, 2, 'identifier rejected')
+    t.equal(broker.connectedClients, 0)
+    t.equal(s.client.version, null)
+  })
+  broker.on('connectionError', function (client, err) {
+    t.equal(err.message, 'identifier rejected')
+  })
+})
+
+test('connect clients with > 23 clientId length using aedes maxClientsIdLength option in MQTT 3.1.0', function (t) {
+  t.plan(4)
+
+  const broker = aedes({ maxClientsIdLength: 26 })
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 3,
+    clean: true,
+    clientId: 'abcdefghijklmnopqrstuvwxyz',
+    keepalive: 0
+  })
+  s.outStream.on('data', function (packet) {
+    t.equal(packet.cmd, 'connack')
+    t.equal(packet.returnCode, 0)
+    t.equal(broker.connectedClients, 1)
+    t.equal(s.client.version, 3)
+  })
+  broker.on('connectionError', function (client, err) {
+    t.error(err, 'no error')
+  })
+})
+
+test('connect with > 23 clientId length in MQTT 3.1.1', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'abcdefghijklmnopqrstuvwxyz',
+    keepalive: 0
+  })
+  s.outStream.on('data', function (packet) {
+    t.equal(packet.cmd, 'connack')
+    t.equal(packet.returnCode, 0)
+    t.equal(broker.connectedClients, 1)
+    t.equal(s.client.version, 4)
+  })
+  broker.on('connectionError', function (client, err) {
+    t.error(err, 'no error')
+  })
+})
+
+// [MQTT-3.1.0-1]
+test('the first Packet MUST be a CONNECT Packet', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const packet = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: false
+  }
+  const s = setup(broker)
+  s.inStream.write(packet)
+
+  broker.on('connectionError', function (client, err) {
+    t.equal(err.message, 'Invalid protocol')
+  })
+  setImmediate(() => {
+    t.ok(s.conn.destroyed, 'close connection if first packet is not a CONNECT')
+    s.conn.destroy()
+  })
+})
+
+// [MQTT-3.1.0-2]
+test('second CONNECT Packet sent from a Client as a protocol violation and disconnect the Client', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const packet = {
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client',
+    keepalive: 0
+  }
+  broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'Invalid protocol')
+  })
+  const s = connect(setup(broker), { clientId: 'abcde' })
+  s.broker.on('clientReady', function () {
+    t.ok(broker.clients.abcde.connected)
+    // destory client when there is a 2nd cmd:connect, even the clientId is dfferent
+    s.inStream.write(packet)
+    setImmediate(() => {
+      t.equal(broker.clients.abcde, undefined, 'client instance is removed')
+      t.ok(s.conn.destroyed, 'close connection if packet is a CONNECT after network is established')
+    })
+  })
+})
+
+test('connect handler calls done when preConnect throws error', function (t) {
+  t.plan(1)
+
+  const broker = aedes({
+    preConnect: function (client, packet, done) {
+      done(Error('error in preconnect'))
+    }
+  })
+
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  const handleConnect = require('../lib/handlers/connect')
+
+  handleConnect(s.client, {}, function done (err) {
+    t.equal(err.message, 'error in preconnect', 'calls done with error')
+  })
+})
+
+test('handler calls done when disconnect or unknown packet cmd is received', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  const handle = require('../lib/handlers/index')
+
+  handle(s.client, { cmd: 'disconnect' }, function done () {
+    t.pass('calls done when disconnect cmd is received')
+  })
+
+  handle(s.client, { cmd: 'fsfadgragae' }, function done () {
+    t.pass('calls done when unknown cmd is received')
+  })
+})
+
+test('reject second CONNECT Packet sent while first CONNECT still in preConnect stage', function (t) {
+  t.plan(2)
+
+  const packet1 = {
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client-1',
+    keepalive: 0
+  }
+  const packet2 = {
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'my-client-2',
+    keepalive: 0
+  }
+
+  let i = 0
+  const broker = aedes({
+    preConnect: function (client, packet, done) {
+      const ms = i++ === 0 ? 2000 : 500
+      setTimeout(function () {
+        done(null, true)
+      }, ms)
+    }
+  })
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  broker.on('connectionError', function (client, err) {
+    t.equal(err.info.clientId, 'my-client-2')
+    t.equal(err.message, 'Invalid protocol')
+  })
+
+  const msg = async (s, ms, msg) => {
+    await delay(ms)
+    s.inStream.write(msg)
+  }
+
+  ;(async () => {
+    await Promise.all([msg(s, 100, packet1), msg(s, 200, packet2)])
+  })().catch(
+    (error) => {
+      t.fail(error)
+    }
+  )
+})
+
+// [MQTT-3.1.2-1], Guarded in mqtt-packet
+test('reject clients with wrong protocol name', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = setup(broker)
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT_hello',
+    protocolVersion: 3,
+    clean: true,
+    clientId: 'my-client',
+    keepalive: 0
+  })
+  s.outStream.on('data', function (packet) {
+    t.fail('no data sent')
+  })
+  broker.on('connectionError', function (client, err) {
+    t.equal(err.message, 'Invalid protocolId')
+    t.equal(broker.connectedClients, 0)
+  })
+})
+
+test('After first CONNECT Packet, others are queued until \'connect\' event', function (t) {
+  t.plan(2)
+
+  const queueLimit = 50
+  const broker = aedes({ queueLimit })
+  t.teardown(broker.close.bind(broker))
+
+  const publishP = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: false
+  }
+
+  const connectP = {
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'abcde',
+    keepalive: 0
+  }
+
+  const s = setup(broker)
+  s.inStream.write(connectP)
+
+  process.once('warning', e => t.fail('Memory leak detected'))
+
+  for (let i = 0; i < queueLimit; i++) {
+    s.inStream.write(publishP)
+  }
+
+  broker.on('client', function (client) {
+    t.equal(client._parser._queue.length, queueLimit, 'Packets have been queued')
+
+    client.once('connected', () => {
+      t.equal(client._parser._queue, null, 'Queue is empty')
+      s.conn.destroy()
+    })
+  })
+})
+
+test('Test queue limit', function (t) {
+  t.plan(1)
+
+  const queueLimit = 50
+  const broker = aedes({ queueLimit })
+  t.teardown(broker.close.bind(broker))
+
+  const publishP = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: false
+  }
+
+  const connectP = {
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId: 'abcde',
+    keepalive: 0
+  }
+
+  const s = setup(broker)
+  s.inStream.write(connectP)
+
+  process.once('warning', e => t.fail('Memory leak detected'))
+
+  for (let i = 0; i < queueLimit + 1; i++) {
+    s.inStream.write(publishP)
+  }
+
+  broker.on('connectionError', function (conn, err) {
+    t.equal(err.message, 'Client queue limit reached', 'Queue error is thrown')
+    s.conn.destroy()
+  })
+})
+
+;[['fail with no error msg', 3, null, false], ['succeed with no error msg', 9, null, true], ['fail with error msg', 6, new Error('connection banned'), false], ['succeed with error msg', 6, new Error('connection banned'), true]].forEach(function (ele, idx) {
+  const title = ele[0]
+  const plan = ele[1]
+  const err = ele[2]
+  const ok = ele[3]
+  test('preConnect handler - ' + title, function (t) {
+    t.plan(plan)
+
+    const broker = aedes({
+      preConnect: function (client, packet, done) {
+        t.ok(client.connecting)
+        t.notOk(client.connected)
+        t.equal(client.version, null)
+        return done(err, ok)
+      }
+    })
+    t.teardown(broker.close.bind(broker))
+
+    const s = setup(broker)
+
+    s.inStream.write({
+      cmd: 'connect',
+      protocolId: 'MQTT',
+      protocolVersion: 4,
+      clean: true,
+      clientId: 'my-client-' + idx,
+      keepalive: 0
+    })
+    broker.on('client', function (client) {
+      if (ok && !err) {
+        t.ok(client.connecting)
+        t.notOk(client.connected)
+        t.pass('register client ok')
+      } else {
+        t.fail('no reach here')
+      }
+    })
+    broker.on('clientReady', function (client) {
+      t.notOk(client.connecting)
+      t.ok(client.connected)
+      t.pass('connect ok')
+    })
+    broker.on('clientError', function (client, err) {
+      t.fail('no client error')
+    })
+    broker.on('connectionError', function (client, err) {
+      if (err) {
+        t.notOk(client.connecting)
+        t.notOk(client.connected)
+        t.equal(err.message, 'connection banned')
+      } else {
+        t.fail('no connection error')
+      }
+    })
+  })
+})
+
+// websocket-stream based connections
+test('websocket clients have access to the request object', function (t) {
+  t.plan(3)
+
+  const port = 4883
+  const broker = aedes()
+  broker.on('client', function (client) {
+    if (client.req) {
+      t.pass('client request object present')
+      if (client.req.headers) {
+        t.equal('sample', client.req.headers['x-test-protocol'])
+      }
+    } else {
+      t.fail('no request object present')
+    }
+  })
+
+  const server = http.createServer()
+  ws.createServer({
+    server
+  }, broker.handle)
+
+  server.listen(port, function (err) {
+    t.error(err, 'no error')
+  })
+
+  const client = mqtt.connect(`ws://localhost:${port}`, {
+    wsOptions: {
+      headers: {
+        'X-Test-Protocol': 'sample'
+      }
+    }
+  })
+
+  t.teardown(() => {
+    client.end(true)
+    broker.close()
+    server.close()
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/test/events.js b/mqtt-backend/node_modules/aedes/test/events.js
new file mode 100644
index 0000000..76ee9ad
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/events.js
@@ -0,0 +1,242 @@
+'use strict'
+
+const { test } = require('tap')
+const mqemitter = require('mqemitter')
+const { setup, connect, subscribe } = require('./helper')
+const aedes = require('../')
+
+test('publishes an hearbeat', function (t) {
+  t.plan(2)
+
+  const broker = aedes({
+    heartbeatInterval: 10 // ms
+  })
+  t.teardown(broker.close.bind(broker))
+
+  broker.subscribe('$SYS/+/heartbeat', function (message, cb) {
+    const id = message.topic.match(/\$SYS\/([^/]+)\/heartbeat/)[1]
+    t.equal(id, broker.id, 'broker id matches')
+    t.same(message.payload.toString(), id, 'message has id as the payload')
+    cb()
+  })
+})
+
+test('publishes birth', function (t) {
+  t.plan(4)
+
+  const mq = mqemitter()
+  const brokerId = 'test-broker'
+  const fakeBroker = 'fake-broker'
+  const clientId = 'test-client'
+
+  mq.on(`$SYS/${brokerId}/birth`, (message, cb) => {
+    t.pass('broker birth received')
+    t.same(message.payload.toString(), brokerId, 'message has id as the payload')
+    cb()
+  })
+
+  const broker = aedes({
+    id: brokerId,
+    mq
+  })
+
+  broker.on('client', (client) => {
+    t.equal(client.id, clientId, 'client connected')
+    // set a fake counter on a fake broker
+    process.nextTick(() => {
+      broker.clients[clientId].duplicates[fakeBroker] = 42
+      mq.emit({ topic: `$SYS/${fakeBroker}/birth`, payload: Buffer.from(fakeBroker) })
+    })
+  })
+
+  mq.on(`$SYS/${fakeBroker}/birth`, (message, cb) => {
+    process.nextTick(() => {
+      t.equal(!!broker.clients[clientId].duplicates[fakeBroker], false, 'client duplicates has been resetted')
+      cb()
+    })
+  })
+
+  const s = connect(setup(broker), { clientId })
+  t.teardown(s.broker.close.bind(s.broker))
+})
+
+;['$mcollina', '$SYS'].forEach(function (topic) {
+  test('does not forward $ prefixed topics to # subscription - ' + topic, function (t) {
+    t.plan(4)
+
+    const s = connect(setup())
+    t.teardown(s.broker.close.bind(s.broker))
+
+    subscribe(t, s, '#', 0, function () {
+      s.outStream.once('data', function (packet) {
+        t.fail('no packet should be received')
+      })
+
+      s.broker.mq.emit({
+        cmd: 'publish',
+        topic: topic + '/hello',
+        payload: 'world'
+      }, function () {
+        t.pass('nothing happened')
+      })
+    })
+  })
+
+  test('does not forward $ prefixed topics to +/# subscription - ' + topic, function (t) {
+    t.plan(4)
+
+    const s = connect(setup())
+    t.teardown(s.broker.close.bind(s.broker))
+
+    subscribe(t, s, '+/#', 0, function () {
+      s.outStream.once('data', function (packet) {
+        t.fail('no packet should be received')
+      })
+
+      s.broker.mq.emit({
+        cmd: 'publish',
+        topic: topic + '/hello',
+        payload: 'world'
+      }, function () {
+        t.pass('nothing happened')
+      })
+    })
+  })
+})
+
+test('does not store $SYS topics to QoS 1 # subscription', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const opts = { clean: false, clientId: 'abcde' }
+  let s = connect(setup(broker), opts)
+
+  subscribe(t, s, '#', 1, function () {
+    s.inStream.end()
+
+    s.broker.publish({
+      cmd: 'publish',
+      topic: '$SYS/hello',
+      payload: 'world',
+      qos: 1
+    }, function () {
+      s = connect(setup(broker), { clean: false, clientId: 'abcde' })
+
+      s.outStream.once('data', function (packet) {
+        t.fail('no packet should be received')
+      })
+    })
+  })
+})
+
+test('Emit event when receives a ping', { timeout: 2000 }, function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('ping', function (packet, client) {
+    if (client && client) {
+      t.equal(client.id, 'abcde')
+      t.equal(packet.cmd, 'pingreq')
+      t.equal(packet.payload, null)
+      t.equal(packet.topic, null)
+      t.equal(packet.length, 0)
+    }
+  })
+
+  const s = connect(setup(broker), { clientId: 'abcde' })
+
+  s.inStream.write({
+    cmd: 'pingreq'
+  })
+})
+
+test('Emit event when broker closed', function (t) {
+  t.plan(1)
+
+  const broker = aedes()
+  broker.once('closed', function () {
+    t.ok(true)
+  })
+  broker.close()
+})
+
+test('Emit closed event one only when double broker.close()', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  broker.on('closed', function () {
+    t.pass('closed')
+  })
+  t.notOk(broker.closed)
+  broker.close()
+  t.ok(broker.closed)
+  broker.close()
+  t.ok(broker.closed)
+})
+
+test('Test backpressure aedes published function', function (t) {
+  t.plan(2)
+
+  let publishCount = 10
+  let count = 0
+
+  const broker = aedes({
+    published: function (packet, client, done) {
+      if (client) {
+        count++
+        setTimeout(() => {
+          publisher.end()
+          done()
+        })
+      } else { done() }
+    }
+  })
+
+  const mqtt = require('mqtt')
+  const server = require('net').createServer(broker.handle)
+  let publisher
+
+  server.listen(0, function () {
+    const port = server.address().port
+    publisher = mqtt.connect({ port, host: 'localhost', clean: true, keepalive: 30 })
+
+    function next () {
+      if (--publishCount > 0) { process.nextTick(publish) }
+    }
+
+    function publish () {
+      publisher.publish('test', 'payload', next)
+    }
+
+    publisher.on('connect', publish)
+    publisher.on('end', function () {
+      t.ok(count > publishCount)
+      t.equal(publishCount, 0)
+      broker.close()
+      server.close()
+    })
+  })
+})
+
+test('clear closed clients when the same clientId is managed by another broker', function (t) {
+  t.plan(2)
+
+  const clientId = 'closed-client'
+  const aedesBroker = aedes()
+
+  // simulate a closed client on the broker
+  aedesBroker.clients[clientId] = { closed: true, broker: aedesBroker }
+  aedesBroker.connectedClients = 1
+
+  // simulate the creation of the same client on another broker of the cluster
+  aedesBroker.publish({ topic: '$SYS/anotherbroker/new/clients', payload: clientId }, () => {
+    t.equal(aedesBroker.clients[clientId], undefined) // check that the closed client was removed
+    t.equal(aedesBroker.connectedClients, 0)
+  })
+
+  t.teardown(aedesBroker.close.bind(aedesBroker))
+})
diff --git a/mqtt-backend/node_modules/aedes/test/helper.js b/mqtt-backend/node_modules/aedes/test/helper.js
new file mode 100644
index 0000000..8457862
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/helper.js
@@ -0,0 +1,119 @@
+'use strict'
+
+const duplexify = require('duplexify')
+const mqtt = require('mqtt-connection')
+const { through } = require('../lib/utils')
+const util = require('util')
+const aedes = require('../')
+
+const parseStream = mqtt.parseStream
+const generateStream = mqtt.generateStream
+let clients = 0
+
+function setup (broker) {
+  const inStream = generateStream()
+  const outStream = parseStream()
+  const conn = duplexify(outStream, inStream)
+
+  broker = broker || aedes()
+
+  return {
+    client: broker.handle(conn),
+    conn,
+    inStream,
+    outStream,
+    broker
+  }
+}
+
+function connect (s, opts, connected) {
+  s = Object.create(s)
+  s.outStream = s.outStream.pipe(through(filter))
+
+  opts = opts || {}
+
+  opts.cmd = 'connect'
+  opts.protocolId = opts.protocolId || 'MQTT'
+  opts.protocolVersion = opts.protocolVersion || 4
+  opts.clean = !!opts.clean
+  opts.clientId = opts.clientId || 'my-client-' + clients++
+  opts.keepalive = opts.keepalive || 0
+
+  s.inStream.write(opts)
+
+  return s
+
+  function filter (packet, enc, cb) {
+    if (packet.cmd !== 'publish') {
+      delete packet.topic
+      delete packet.payload
+    }
+
+    // using setImmediate to wait for connected to be fired
+    // setup also needs to return first
+    if (packet.cmd !== 'connack') {
+      setImmediate(this.push.bind(this, packet))
+    } else if (connected && packet.returnCode === 0) {
+      setImmediate(connected, packet)
+    }
+    cb()
+  }
+}
+
+function noError (s, t) {
+  s.broker.on('clientError', function (client, err) {
+    if (err) throw err
+    t.notOk(err, 'must not error')
+  })
+
+  return s
+}
+
+function subscribe (t, subscriber, topic, qos, done) {
+  subscriber.inStream.write({
+    cmd: 'subscribe',
+    messageId: 24,
+    subscriptions: [{
+      topic,
+      qos
+    }]
+  })
+
+  subscriber.outStream.once('data', function (packet) {
+    t.equal(packet.cmd, 'suback')
+    t.same(packet.granted, [qos])
+    t.equal(packet.messageId, 24)
+
+    if (done) {
+      done(null, packet)
+    }
+  })
+}
+
+// subs: [{topic:, qos:}]
+function subscribeMultiple (t, subscriber, subs, expectedGranted, done) {
+  subscriber.inStream.write({
+    cmd: 'subscribe',
+    messageId: 24,
+    subscriptions: subs
+  })
+
+  subscriber.outStream.once('data', function (packet) {
+    t.equal(packet.cmd, 'suback')
+    t.same(packet.granted, expectedGranted)
+    t.equal(packet.messageId, 24)
+
+    if (done) {
+      done(null, packet)
+    }
+  })
+}
+
+module.exports = {
+  setup,
+  connect,
+  noError,
+  subscribe,
+  subscribeMultiple,
+  delay: util.promisify(setTimeout)
+}
diff --git a/mqtt-backend/node_modules/aedes/test/keep-alive.js b/mqtt-backend/node_modules/aedes/test/keep-alive.js
new file mode 100644
index 0000000..ac64190
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/keep-alive.js
@@ -0,0 +1,92 @@
+'use strict'
+
+const { test } = require('tap')
+const eos = require('end-of-stream')
+const Faketimers = require('@sinonjs/fake-timers')
+const { setup, connect, noError } = require('./helper')
+const aedes = require('../')
+
+test('supports pingreq/pingresp', function (t) {
+  t.plan(1)
+
+  const s = noError(connect(setup()))
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.on('keepaliveTimeout', function (client) {
+    t.fail('keep alive should not timeout')
+  })
+
+  s.inStream.write({
+    cmd: 'pingreq'
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.equal(packet.cmd, 'pingresp', 'the response is a pingresp')
+  })
+})
+
+test('supports keep alive disconnections', function (t) {
+  t.plan(2)
+
+  const clock = Faketimers.install()
+  const s = connect(setup(), { keepalive: 1 })
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.on('keepaliveTimeout', function (client) {
+    t.pass('keep alive timeout')
+  })
+  eos(s.conn, function () {
+    t.pass('waits 1 and a half the keepalive timeout')
+  })
+
+  setTimeout(() => {
+    clock.uninstall()
+  }, 1.5)
+  clock.tick(1.5)
+})
+
+test('supports keep alive disconnections after a pingreq', function (t) {
+  t.plan(3)
+
+  const clock = Faketimers.install()
+  const s = connect(setup(), { keepalive: 1 })
+  t.teardown(s.broker.close.bind(s.broker))
+
+  eos(s.conn, function () {
+    t.pass('waits 1 and a half the keepalive timeout')
+  })
+  s.broker.on('keepaliveTimeout', function (client) {
+    t.pass('keep alive timeout')
+  })
+  s.outStream.on('data', function (packet) {
+    t.equal(packet.cmd, 'pingresp', 'the response is a pingresp')
+  })
+  setTimeout(() => {
+    s.inStream.write({
+      cmd: 'pingreq'
+    })
+    clock.uninstall()
+  }, 1)
+  clock.tick(3)
+})
+
+test('disconnect if a connect does not arrive in time', function (t) {
+  t.plan(2)
+
+  const clock = Faketimers.install()
+  const s = setup(aedes({
+    connectTimeout: 500
+  }))
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.client.on('error', function (err) {
+    t.equal(err.message, 'connect did not arrive in time')
+  })
+  eos(s.conn, function () {
+    t.pass('waits waitConnectTimeout before ending')
+  })
+  setTimeout(() => {
+    clock.uninstall()
+  }, 1000)
+  clock.tick(1000)
+})
diff --git a/mqtt-backend/node_modules/aedes/test/meta.js b/mqtt-backend/node_modules/aedes/test/meta.js
new file mode 100644
index 0000000..510f990
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/meta.js
@@ -0,0 +1,327 @@
+'use strict'
+
+const { test } = require('tap')
+const { setup, connect, subscribe, noError } = require('./helper')
+const aedes = require('../')
+
+test('count connected clients', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  t.equal(broker.connectedClients, 0, 'no connected clients')
+
+  connect(setup(broker), {
+  }, function () {
+    t.equal(broker.connectedClients, 1, 'one connected clients')
+
+    const last = connect(setup(broker), {
+    }, function () {
+      t.equal(broker.connectedClients, 2, 'two connected clients')
+
+      last.conn.destroy()
+
+      // needed because destroy() will do the trick before
+      // the next tick
+      setImmediate(function () {
+        t.equal(broker.connectedClients, 1, 'one connected clients')
+      })
+    })
+  })
+})
+
+test('call published method', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.published = function (packet, client, done) {
+    t.equal(packet.topic, 'hello', 'topic matches')
+    t.equal(packet.payload.toString(), 'world', 'payload matches')
+    t.equal(client, null, 'no client')
+    done()
+  }
+
+  broker.publish({
+    topic: 'hello',
+    payload: Buffer.from('world')
+  }, function (err) {
+    t.error(err, 'no error')
+  })
+})
+
+test('call published method with client', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.published = function (packet, client, done) {
+    // for internal messages, client will be null
+    if (client) {
+      t.equal(packet.topic, 'hello', 'topic matches')
+      t.equal(packet.payload.toString(), 'world', 'payload matches')
+      t.equal(packet.qos, 1)
+      t.equal(packet.messageId, 42)
+      done()
+    }
+  }
+
+  const s = connect(setup(broker))
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    messageId: 42
+  })
+})
+
+test('emit publish event with client - QoS 0', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('publish', function (packet, client) {
+    // for internal messages, client will be null
+    if (client) {
+      t.equal(packet.qos, 0)
+      t.equal(packet.topic, 'hello', 'topic matches')
+      t.equal(packet.payload.toString(), 'world', 'payload matches')
+    }
+  })
+
+  const s = connect(setup(broker))
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0
+  })
+})
+
+test('emit publish event with client - QoS 1', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('publish', function (packet, client) {
+    // for internal messages, client will be null
+    if (client) {
+      t.equal(packet.qos, 1)
+      t.equal(packet.messageId, 42)
+      t.equal(packet.topic, 'hello', 'topic matches')
+      t.equal(packet.payload.toString(), 'world', 'payload matches')
+    }
+  })
+
+  const s = connect(setup(broker))
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    messageId: 42
+  })
+})
+
+test('emit subscribe event', function (t) {
+  t.plan(6)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = connect(setup(broker), { clientId: 'abcde' })
+
+  broker.on('subscribe', function (subscriptions, client) {
+    t.same(subscriptions, [{
+      topic: 'hello',
+      qos: 0
+    }], 'topic matches')
+    t.equal(client.id, 'abcde', 'client matches')
+  })
+
+  subscribe(t, s, 'hello', 0, function () {
+    t.pass('subscribe completed')
+  })
+})
+
+test('emit subscribe event if unrecognized params in subscribe packet structure', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = noError(connect(setup(broker)))
+  const subs = [{ topic: 'hello', qos: 0 }]
+
+  broker.on('subscribe', function (subscriptions, client) {
+    t.equal(subscriptions, subs)
+    t.same(client, s.client)
+  })
+
+  s.client.subscribe({
+    subscriptions: subs,
+    restore: true
+  }, function (err) {
+    t.error(err)
+  })
+})
+
+test('emit unsubscribe event', function (t) {
+  t.plan(6)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = connect(setup(broker), { clean: true, clientId: 'abcde' })
+
+  broker.on('unsubscribe', function (unsubscriptions, client) {
+    t.same(unsubscriptions, [
+      'hello'
+    ], 'unsubscription matches')
+    t.equal(client.id, 'abcde', 'client matches')
+  })
+
+  subscribe(t, s, 'hello', 0, function () {
+    s.inStream.write({
+      cmd: 'unsubscribe',
+      messageId: 43,
+      unsubscriptions: ['hello']
+    })
+
+    s.outStream.once('data', function (packet) {
+      t.pass('subscribe completed')
+    })
+  })
+})
+
+test('emit unsubscribe event if unrecognized params in unsubscribe packet structure', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = noError(connect(setup(broker)))
+  const unsubs = [{ topic: 'hello', qos: 0 }]
+
+  broker.on('unsubscribe', function (unsubscriptions, client) {
+    t.equal(unsubscriptions, unsubs)
+    t.same(client, s.client)
+  })
+
+  s.client.unsubscribe({
+    unsubscriptions: unsubs,
+    close: true
+  }, function (err) {
+    t.error(err)
+  })
+})
+
+test('dont emit unsubscribe event on client close', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = noError(connect(setup(broker), { clientId: 'abcde' }), t)
+
+  broker.on('unsubscribe', function (unsubscriptions, client) {
+    t.error('unsubscribe should not be emitted')
+  })
+
+  subscribe(t, s, 'hello', 0, function () {
+    s.inStream.end({
+      cmd: 'disconnect'
+    })
+    s.outStream.once('data', function (packet) {
+      t.pass('unsubscribe completed')
+    })
+  })
+})
+
+test('emit clientDisconnect event', function (t) {
+  t.plan(1)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('clientDisconnect', function (client) {
+    t.equal(client.id, 'abcde', 'client matches')
+  })
+
+  const s = noError(connect(setup(broker), { clientId: 'abcde' }), t)
+
+  s.inStream.end({
+    cmd: 'disconnect'
+  })
+  s.outStream.resume()
+})
+
+test('emits client', function (t) {
+  t.plan(1)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('client', function (client) {
+    t.equal(client.id, 'abcde', 'clientId matches')
+  })
+
+  connect(setup(broker), {
+    clientId: 'abcde'
+  })
+})
+
+test('get aedes version', function (t) {
+  t.plan(1)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  t.equal(broker.version, require('../package.json').version)
+})
+
+test('connect and connackSent event', { timeout: 50 }, function (t) {
+  t.plan(3)
+
+  const s = setup()
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const clientId = 'my-client'
+
+  s.broker.on('connackSent', function (packet, client) {
+    t.equal(packet.returnCode, 0)
+    t.equal(client.id, clientId, 'connackSent event and clientId matches')
+  })
+
+  s.inStream.write({
+    cmd: 'connect',
+    protocolId: 'MQTT',
+    protocolVersion: 4,
+    clean: true,
+    clientId,
+    keepalive: 0
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, {
+      cmd: 'connack',
+      returnCode: 0,
+      length: 2,
+      qos: 0,
+      retain: false,
+      dup: false,
+      topic: null,
+      payload: null,
+      sessionPresent: false
+    }, 'successful connack')
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/test/not-blocking.js b/mqtt-backend/node_modules/aedes/test/not-blocking.js
new file mode 100644
index 0000000..c2e50a9
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/not-blocking.js
@@ -0,0 +1,231 @@
+'use strict'
+
+const { test } = require('tap')
+const EventEmitter = require('events')
+const mqtt = require('mqtt')
+const net = require('net')
+const Faketimers = require('@sinonjs/fake-timers')
+const aedes = require('../')
+
+test('connect 500 concurrent clients', function (t) {
+  t.plan(3)
+
+  const evt = new EventEmitter()
+  const broker = aedes()
+  const server = net.createServer(broker.handle)
+  const total = 500
+
+  server.listen(0, function (err) {
+    t.error(err, 'no error')
+
+    const clock = Faketimers.createClock()
+    t.teardown(clock.reset.bind(clock))
+
+    const port = server.address().port
+
+    let connected = 0
+    const clients = []
+    clock.setTimeout(function () {
+      t.equal(clients.length, total)
+      t.equal(connected, total)
+      while (clients.length) {
+        clients.shift().end()
+      }
+    }, total)
+
+    evt.on('finish', function () {
+      if (clients.length === 0) {
+        broker.close()
+        server.close()
+      }
+    })
+
+    for (let i = 0; i < total; i++) {
+      clients[i] = mqtt.connect({
+        port,
+        keepalive: 0,
+        reconnectPeriod: 100
+      }).on('connect', function () {
+        connected++
+        if ((connected % (total / 10)) === 0) {
+          console.log('connected', connected)
+        }
+        clock.tick(1)
+      }).on('close', function () {
+        evt.emit('finish')
+      })
+    }
+  })
+})
+
+test('do not block after a subscription', function (t) {
+  t.plan(3)
+
+  const evt = new EventEmitter()
+  const broker = aedes()
+  const server = net.createServer(broker.handle)
+  const total = 10000
+  let sent = 0
+  let received = 0
+
+  server.listen(0, function (err) {
+    t.error(err, 'no error')
+
+    const clock = Faketimers.createClock()
+    t.teardown(clock.reset.bind(clock))
+
+    const clockId = clock.setTimeout(finish, total)
+
+    const port = server.address().port
+
+    const publisher = mqtt.connect({
+      port,
+      keepalive: 0
+    }).on('error', function (err) {
+      clock.clearTimeout(clockId)
+      t.fail(err)
+    })
+
+    let subscriber
+
+    function immediatePublish () {
+      setImmediate(publish)
+    }
+
+    function publish () {
+      if (sent === total) {
+        publisher.end()
+      } else {
+        sent++
+        publisher.publish('test', 'payload', immediatePublish)
+      }
+    }
+
+    function startSubscriber () {
+      subscriber = mqtt.connect({
+        port,
+        keepalive: 0
+      }).on('error', function (err) {
+        clock.clearTimeout(clockId)
+        t.fail(err)
+      })
+
+      subscriber.subscribe('test', publish)
+
+      subscriber.on('message', function () {
+        if (received % (total / 10) === 0) {
+          console.log('sent / received', sent, received)
+        }
+        received++
+        clock.tick(1)
+      })
+      subscriber.on('close', function () {
+        evt.emit('finish')
+      })
+    }
+
+    publisher.on('connect', startSubscriber)
+    publisher.on('close', function () {
+      evt.emit('finish')
+    })
+    evt.on('finish', function () {
+      if (publisher.connected || subscriber.connected) { return }
+      broker.close()
+      server.close()
+      t.equal(total, sent, 'messages sent')
+      t.equal(total, received, 'messages received')
+    })
+    function finish () {
+      subscriber.end()
+      publisher.end()
+    }
+  })
+})
+
+test('do not block with overlapping subscription', function (t) {
+  t.plan(3)
+
+  const evt = new EventEmitter()
+  const broker = aedes({ concurrency: 15 })
+  const server = net.createServer(broker.handle)
+  const total = 10000
+  let sent = 0
+  let received = 0
+
+  server.listen(0, function (err) {
+    t.error(err, 'no error')
+
+    const clock = Faketimers.createClock()
+    t.teardown(clock.reset.bind(clock))
+
+    const clockId = clock.setTimeout(finish, total)
+
+    const port = server.address().port
+
+    const publisher = mqtt.connect({
+      port,
+      keepalive: 0
+    }).on('error', function (err) {
+      clock.clearTimeout(clockId)
+      t.fail(err)
+    })
+
+    let subscriber
+
+    function immediatePublish (e) {
+      setImmediate(publish)
+    }
+
+    function publish () {
+      if (sent === total) {
+        publisher.end()
+      } else {
+        sent++
+        publisher.publish('test', 'payload', immediatePublish)
+      }
+    }
+
+    function startSubscriber () {
+      subscriber = mqtt.connect({
+        port,
+        keepalive: 0
+      }).on('error', function (err) {
+        clock.clearTimeout(clockId)
+        t.fail(err)
+      })
+
+      subscriber.subscribe('#', function () {
+        subscriber.subscribe('test', function () {
+          immediatePublish()
+        })
+      })
+
+      subscriber.on('message', function () {
+        if (received % (total / 10) === 0) {
+          console.log('sent / received', sent, received)
+        }
+        received++
+        clock.tick(1)
+      })
+      subscriber.on('close', function () {
+        evt.emit('finish')
+      })
+    }
+
+    publisher.on('connect', startSubscriber)
+    publisher.on('close', function () {
+      evt.emit('finish')
+    })
+    evt.on('finish', function () {
+      if (publisher.connected || subscriber.connected) { return }
+      broker.close()
+      server.close()
+      t.equal(total, sent, 'messages sent')
+      t.equal(total, received, 'messages received')
+    })
+    function finish () {
+      subscriber.end()
+      publisher.end()
+    }
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/test/qos1.js b/mqtt-backend/node_modules/aedes/test/qos1.js
new file mode 100644
index 0000000..8f36eaa
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/qos1.js
@@ -0,0 +1,880 @@
+'use strict'
+
+const { test } = require('tap')
+const concat = require('concat-stream')
+const { setup, connect, subscribe } = require('./helper')
+const Faketimers = require('@sinonjs/fake-timers')
+const aedes = require('../')
+
+test('publish QoS 1', function (t) {
+  t.plan(1)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const expected = {
+    cmd: 'puback',
+    messageId: 42,
+    qos: 0,
+    dup: false,
+    length: 2,
+    retain: false
+  }
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 1,
+    messageId: 42
+  })
+
+  s.outStream.on('data', function (packet) {
+    t.same(packet, expected, 'packet must match')
+  })
+})
+
+test('publish QoS 1 throws error', function (t) {
+  t.plan(1)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.persistence.subscriptionsByTopic = function (packet, done) {
+    return done(new Error('Throws error'))
+  }
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 1,
+    messageId: 42
+  })
+
+  s.broker.on('error', function (err) {
+    t.equal('Throws error', err.message, 'Throws error')
+  })
+})
+
+test('publish QoS 1 throws error on write', function (t) {
+  t.plan(1)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.on('client', function (client) {
+    client.connected = false
+    client.connecting = false
+
+    s.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      messageId: 42
+    })
+  })
+
+  s.broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'connection closed', 'throws error')
+  })
+})
+
+test('publish QoS 1 and check offline queue', function (t) {
+  t.plan(13)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker), { clean: false })
+  const subscriberClient = {
+    id: 'abcde'
+  }
+  const subscriber = connect(setup(broker), { clean: false, clientId: subscriberClient.id })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    qos: 1,
+    dup: false,
+    retain: false
+  }
+  const expectedAck = {
+    cmd: 'puback',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 2,
+    messageId: 10
+  }
+  const sent = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 1,
+    messageId: 10,
+    retain: false,
+    dup: false
+  }
+  const queue = []
+  subscribe(t, subscriber, 'hello', 1, function () {
+    publisher.outStream.on('data', function (packet) {
+      t.same(packet, expectedAck, 'ack packet must patch')
+    })
+    subscriber.outStream.on('data', function (packet) {
+      queue.push(packet)
+      delete packet.payload
+      delete packet.length
+      t.not(packet.messageId, undefined, 'messageId is assigned a value')
+      t.not(packet.messageId, 10, 'messageId should be unique')
+      expected.messageId = packet.messageId
+      t.same(packet, expected, 'publish packet must patch')
+      if (queue.length === 2) {
+        setImmediate(() => {
+          for (let i = 0; i < queue.length; i++) {
+            broker.persistence.outgoingClearMessageId(subscriberClient, queue[i], function (_, origPacket) {
+              if (origPacket) {
+                delete origPacket.brokerId
+                delete origPacket.brokerCounter
+                delete origPacket.payload
+                delete origPacket.messageId
+                delete sent.payload
+                delete sent.messageId
+                t.same(origPacket, sent, 'origPacket must match')
+              }
+            })
+          }
+        })
+      }
+    })
+    publisher.inStream.write(sent)
+    sent.payload = 'world2world'
+    publisher.inStream.write(sent)
+  })
+})
+
+test('publish QoS 1 and empty offline queue', function (t) {
+  t.plan(13)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker), { clean: false })
+  const subscriberClient = {
+    id: 'abcde'
+  }
+  const subscriber = connect(setup(broker), { clean: false, clientId: subscriberClient.id })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    qos: 1,
+    dup: false,
+    retain: false
+  }
+  const expectedAck = {
+    cmd: 'puback',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 2,
+    messageId: 10
+  }
+  const sent = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 1,
+    messageId: 10,
+    retain: false,
+    dup: false
+  }
+  const queue = []
+  subscribe(t, subscriber, 'hello', 1, function () {
+    publisher.outStream.on('data', function (packet) {
+      t.same(packet, expectedAck, 'ack packet must patch')
+    })
+    subscriber.outStream.on('data', function (packet) {
+      queue.push(packet)
+      delete packet.payload
+      delete packet.length
+      t.not(packet.messageId, undefined, 'messageId is assigned a value')
+      t.not(packet.messageId, 10, 'messageId should be unique')
+      expected.messageId = packet.messageId
+      t.same(packet, expected, 'publish packet must patch')
+      if (queue.length === 2) {
+        setImmediate(() => {
+          broker.clients[subscriberClient.id].emptyOutgoingQueue(function () {
+            for (let i = 0; i < queue.length; i++) {
+              broker.persistence.outgoingClearMessageId(subscriberClient, queue[i], function (_, origPacket) {
+                t.equal(!!origPacket, false, 'Packet has been removed')
+              })
+            }
+          })
+        })
+      }
+    })
+    publisher.inStream.write(sent)
+    sent.payload = 'world2world'
+    publisher.inStream.write(sent)
+  })
+})
+
+test('subscribe QoS 1', function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.outStream.once('data', function (packet) {
+      subscriber.inStream.write({
+        cmd: 'puback',
+        messageId: packet.messageId
+      })
+      t.not(packet.messageId, 42, 'messageId must differ')
+      delete packet.messageId
+      t.same(packet, expected, 'packet must match')
+    })
+
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      messageId: 42
+    })
+  })
+})
+
+test('subscribe QoS 0, but publish QoS 1', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    dup: false,
+    length: 12,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 0, function () {
+    subscriber.outStream.once('data', function (packet) {
+      t.same(packet, expected, 'packet must match')
+    })
+
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      messageId: 42
+    })
+  })
+})
+
+test('restore QoS 1 subscriptions not clean', function (t) {
+  t.plan(7)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.inStream.end()
+
+    const publisher = connect(setup(broker))
+
+    subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' }, function (connect) {
+      t.equal(connect.sessionPresent, true, 'session present is set to true')
+      publisher.inStream.write({
+        cmd: 'publish',
+        topic: 'hello',
+        payload: 'world',
+        qos: 1,
+        messageId: 42
+      })
+    })
+
+    publisher.outStream.once('data', function (packet) {
+      t.equal(packet.cmd, 'puback')
+    })
+
+    subscriber.outStream.once('data', function (packet) {
+      subscriber.inStream.write({
+        cmd: 'puback',
+        messageId: packet.messageId
+      })
+      t.not(packet.messageId, 42, 'messageId must differ')
+      delete packet.messageId
+      t.same(packet, expected, 'packet must match')
+    })
+  })
+})
+
+test('restore multiple QoS 1 subscriptions not clean w/ authorizeSubscribe', function (t) {
+  t.plan(11)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' })
+  const expected = {
+    cmd: 'publish',
+    topic: 'foo',
+    payload: Buffer.from('bar'),
+    qos: 1,
+    dup: false,
+    length: 10,
+    retain: false
+  }
+  const publisher = connect(setup(broker))
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscribe(t, subscriber, 'foo', 1, function () {
+      subscriber.inStream.end()
+      broker.authorizeSubscribe = function (client, sub, done) {
+        done(null, sub.topic === 'hello' ? 123 : sub)
+      }
+      subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' }, function (connect) {
+        t.equal(connect.sessionPresent, true, 'session present is set to true')
+        publisher.inStream.write({
+          cmd: 'publish',
+          topic: 'hello',
+          payload: 'world',
+          qos: 1,
+          messageId: 42
+        })
+        publisher.inStream.write({
+          cmd: 'publish',
+          topic: 'foo',
+          payload: 'bar',
+          qos: 1,
+          messageId: 48
+        })
+      })
+      publisher.outStream.on('data', function (packet) {
+        t.equal(packet.cmd, 'puback')
+      })
+
+      subscriber.outStream.on('data', function (packet) {
+        subscriber.inStream.write({
+          cmd: 'puback',
+          messageId: packet.messageId
+        })
+        t.not(packet.messageId, 48, 'messageId must differ')
+        delete packet.messageId
+        t.same(packet, expected, 'packet must match')
+      })
+    })
+  })
+})
+
+test('remove stored subscriptions if connected with clean=true', function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' })
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.inStream.end()
+
+    const publisher = connect(setup(broker))
+
+    subscriber = connect(setup(broker), { clean: true, clientId: 'abcde' }, function (packet) {
+      t.equal(packet.sessionPresent, false, 'session present is set to false')
+      publisher.inStream.write({
+        cmd: 'publish',
+        topic: 'hello',
+        payload: 'world',
+        qos: 1,
+        messageId: 42
+      })
+
+      subscriber.inStream.end()
+
+      subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' }, function (connect) {
+        t.equal(connect.sessionPresent, false, 'session present is set to false')
+        publisher.inStream.write({
+          cmd: 'publish',
+          topic: 'hello',
+          payload: 'world',
+          qos: 1,
+          messageId: 43
+        })
+      })
+
+      subscriber.outStream.once('data', function (packet) {
+        t.fail('publish received')
+      })
+    })
+
+    subscriber.outStream.once('data', function (packet) {
+      t.fail('publish received')
+    })
+  })
+})
+
+test('resend publish on non-clean reconnect QoS 1', function (t) {
+  t.plan(8)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const opts = { clean: false, clientId: 'abcde' }
+  let subscriber = connect(setup(broker), opts)
+  const subscriberClient = {
+    id: opts.clientId
+  }
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.inStream.end()
+
+    const publisher = connect(setup(broker))
+
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      messageId: 42
+    })
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world world',
+      qos: 1,
+      messageId: 42
+    })
+    publisher.outStream.once('data', function (packet) {
+      t.equal(packet.cmd, 'puback')
+
+      subscriber = connect(setup(broker), opts)
+
+      subscriber.outStream.once('data', function (packet) {
+        subscriber.inStream.write({
+          cmd: 'puback',
+          messageId: packet.messageId
+        })
+        t.not(packet.messageId, 42, 'messageId must differ')
+        delete packet.messageId
+        t.same(packet, expected, 'packet must match')
+        setImmediate(() => {
+          const stream = broker.persistence.outgoingStream(subscriberClient)
+          stream.pipe(concat(function (list) {
+            t.equal(list.length, 1, 'should remain one item in queue')
+            t.same(list[0].payload, Buffer.from('world world'), 'packet must match')
+          }))
+        })
+      })
+    })
+  })
+})
+
+test('resend many publish on non-clean reconnect QoS 1', function (t) {
+  t.plan(4)
+  const broker = aedes()
+  const clock = Faketimers.createClock()
+
+  t.teardown(() => {
+    broker.close.bind(broker)
+    clock.reset.bind(clock)
+  })
+
+  const opts = { clean: false, clientId: 'abcde' }
+  let subscriber = connect(setup(broker), opts)
+  const publisher = connect(setup(broker))
+  const { through } = require('../lib/utils')
+  const total = through().writableHighWaterMark * 2
+
+  let received = 0
+  clock.setTimeout(() => {
+    broker.close()
+    t.equal(received, total)
+  }, total)
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.inStream.end()
+
+    for (let sent = 0; sent < total; sent++) {
+      publisher.inStream.write({
+        cmd: 'publish',
+        topic: 'hello',
+        payload: 'message-' + sent,
+        qos: 1,
+        messageId: 42 + sent
+      })
+    }
+    publisher.outStream.once('data', function (packet) {
+      subscriber = connect(setup(broker), opts)
+      subscriber.outStream.on('data', function (packet) {
+        subscriber.inStream.write({
+          cmd: 'puback',
+          messageId: packet.messageId
+        })
+        received++
+        clock.tick(1)
+      })
+    })
+  })
+})
+
+test('do not resend QoS 1 packets at each reconnect', function (t) {
+  t.plan(6)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.inStream.end()
+
+    const publisher = connect(setup(broker))
+
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      messageId: 42
+    })
+
+    publisher.outStream.once('data', function (packet) {
+      t.equal(packet.cmd, 'puback')
+
+      subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' })
+
+      subscriber.outStream.once('data', function (packet) {
+        subscriber.inStream.end({
+          cmd: 'puback',
+          messageId: packet.messageId
+        })
+
+        t.not(packet.messageId, 42, 'messageId must differ')
+        delete packet.messageId
+        t.same(packet, expected, 'packet must match')
+
+        const subscriber2 = connect(setup(broker), { clean: false, clientId: 'abcde' })
+
+        subscriber2.outStream.once('data', function (packet) {
+          t.fail('this should never happen')
+        })
+      })
+    })
+  })
+})
+
+test('do not resend QoS 1 packets if reconnect is clean', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' })
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.inStream.end()
+
+    const publisher = connect(setup(broker))
+
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      messageId: 42
+    })
+
+    publisher.outStream.once('data', function (packet) {
+      t.equal(packet.cmd, 'puback')
+
+      subscriber = connect(setup(broker), { clean: true, clientId: 'abcde' })
+
+      subscriber.outStream.once('data', function (packet) {
+        t.fail('this should never happen')
+      })
+    })
+  })
+})
+
+test('do not resend QoS 1 packets at reconnect if puback was received', function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    const publisher = connect(setup(broker))
+
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      messageId: 42
+    })
+
+    publisher.outStream.once('data', function (packet) {
+      t.equal(packet.cmd, 'puback')
+    })
+
+    subscriber.outStream.once('data', function (packet) {
+      subscriber.inStream.end({
+        cmd: 'puback',
+        messageId: packet.messageId
+      })
+
+      delete packet.messageId
+      t.same(packet, expected, 'packet must match')
+
+      subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' })
+
+      subscriber.outStream.once('data', function (packet) {
+        t.fail('this should never happen')
+      })
+    })
+  })
+})
+
+test('remove stored subscriptions after unsubscribe', function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' })
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.inStream.write({
+      cmd: 'unsubscribe',
+      messageId: 43,
+      unsubscriptions: ['hello']
+    })
+
+    subscriber.outStream.once('data', function (packet) {
+      t.same(packet, {
+        cmd: 'unsuback',
+        messageId: 43,
+        dup: false,
+        length: 2,
+        qos: 0,
+        retain: false
+      }, 'packet matches')
+
+      subscriber.inStream.end()
+
+      const publisher = connect(setup(broker))
+
+      subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' }, function (packet) {
+        t.equal(packet.sessionPresent, false, 'session present is set to false')
+        publisher.inStream.write({
+          cmd: 'publish',
+          topic: 'hello',
+          payload: 'world',
+          qos: 1,
+          messageId: 42
+        })
+
+        publisher.inStream.write({
+          cmd: 'publish',
+          topic: 'hello',
+          payload: 'world',
+          qos: 1,
+          messageId: 43
+        }, function () {
+          subscriber.inStream.end()
+        })
+
+        subscriber.outStream.once('data', function (packet) {
+          t.fail('publish received')
+        })
+      })
+
+      subscriber.outStream.once('data', function (packet) {
+        t.fail('publish received')
+      })
+    })
+  })
+})
+
+test('upgrade a QoS 0 subscription to QoS 1', function (t) {
+  t.plan(8)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    length: 14,
+    retain: false,
+    dup: false
+  }
+
+  subscribe(t, s, 'hello', 0, function () {
+    subscribe(t, s, 'hello', 1, function () {
+      s.outStream.once('data', function (packet) {
+        t.ok(packet.messageId, 'has messageId')
+        delete packet.messageId
+        t.same(packet, expected, 'packet matches')
+      })
+
+      s.broker.publish({
+        cmd: 'publish',
+        topic: 'hello',
+        payload: 'world',
+        qos: 1
+      })
+    })
+  })
+})
+
+test('downgrade QoS 0 publish on QoS 1 subsciption', function (t) {
+  t.plan(4)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    length: 12,
+    retain: false,
+    dup: false
+  }
+
+  subscribe(t, s, 'hello', 1, function () {
+    s.outStream.once('data', function (packet) {
+      t.same(packet, expected, 'packet matches')
+    })
+    s.broker.publish({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 0
+    })
+  })
+})
+
+test('subscribe and publish QoS 1 in parallel', function (t) {
+  t.plan(5)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+
+  broker.on('clientError', function (client, err) {
+    console.log(err.stack)
+    // t.fail('no client error')
+  })
+
+  s.outStream.once('data', function (packet) {
+    t.equal(packet.cmd, 'puback')
+    t.equal(packet.messageId, 42, 'messageId must match')
+    s.outStream.on('data', function (packet) {
+      if (packet.cmd === 'suback') {
+        t.same(packet.granted, [1])
+        t.equal(packet.messageId, 24)
+      }
+      if (packet.cmd === 'publish') {
+        s.inStream.write({
+          cmd: 'puback',
+          messageId: packet.messageId
+        })
+        delete packet.messageId
+        t.same(packet, expected, 'packet must match')
+      }
+    })
+  })
+
+  s.inStream.write({
+    cmd: 'subscribe',
+    messageId: 24,
+    subscriptions: [{
+      topic: 'hello',
+      qos: 1
+    }]
+  })
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 1,
+    messageId: 42
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/test/qos2.js b/mqtt-backend/node_modules/aedes/test/qos2.js
new file mode 100644
index 0000000..00b028a
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/qos2.js
@@ -0,0 +1,686 @@
+'use strict'
+
+const { test } = require('tap')
+const concat = require('concat-stream')
+const { setup, connect, subscribe } = require('./helper')
+const aedes = require('../')
+
+function publish (t, s, packet, done) {
+  const msgId = packet.messageId
+
+  s.inStream.write(packet)
+
+  s.outStream.once('data', function (packet) {
+    t.same(packet, {
+      cmd: 'pubrec',
+      messageId: msgId,
+      length: 2,
+      dup: false,
+      retain: false,
+      qos: 0
+    }, 'pubrec must match')
+
+    s.inStream.write({
+      cmd: 'pubrel',
+      messageId: msgId
+    })
+
+    s.outStream.once('data', function (packet) {
+      t.same(packet, {
+        cmd: 'pubcomp',
+        messageId: msgId,
+        length: 2,
+        dup: false,
+        retain: false,
+        qos: 0
+      }, 'pubcomp must match')
+
+      if (done) {
+        done()
+      }
+    })
+  })
+}
+
+function receive (t, subscriber, expected, done) {
+  subscriber.outStream.once('data', function (packet) {
+    t.not(packet.messageId, expected.messageId, 'messageId must differ')
+
+    const msgId = packet.messageId
+    delete packet.messageId
+    delete expected.messageId
+    t.same(packet, expected, 'packet must match')
+
+    subscriber.inStream.write({
+      cmd: 'pubrec',
+      messageId: msgId
+    })
+
+    subscriber.outStream.once('data', function (packet) {
+      subscriber.inStream.write({
+        cmd: 'pubcomp',
+        messageId: msgId
+      })
+      t.same(packet, {
+        cmd: 'pubrel',
+        messageId: msgId,
+        length: 2,
+        qos: 1,
+        retain: false,
+        dup: false
+      }, 'pubrel must match')
+
+      if (done) {
+        done()
+      }
+    })
+  })
+}
+
+test('publish QoS 2', function (t) {
+  t.plan(2)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const packet = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 2,
+    messageId: 42
+  }
+  publish(t, s, packet)
+})
+
+test('subscribe QoS 2', function (t) {
+  t.plan(8)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const toPublish = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 2,
+    messageId: 42,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 2, function () {
+    publish(t, publisher, toPublish)
+
+    receive(t, subscriber, toPublish)
+  })
+})
+
+test('publish QoS 2 throws error on write', function (t) {
+  t.plan(1)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.on('client', function (client) {
+    client.connected = false
+    client.connecting = false
+
+    s.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 2,
+      messageId: 42
+    })
+  })
+
+  s.broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'connection closed', 'throws error')
+  })
+})
+
+test('pubrec handler calls done when outgoingUpdate fails (clean=false)', function (t) {
+  t.plan(1)
+
+  const s = connect(setup(), { clean: false })
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const handle = require('../lib/handlers/pubrec.js')
+
+  s.broker.persistence.outgoingUpdate = function (client, pubrel, done) {
+    done(Error('throws error'))
+  }
+
+  handle(s.client, { messageId: 42 }, function done () {
+    t.pass('calls done on error')
+  })
+})
+
+test('client.publish with clean=true subscribption QoS 2', function (t) {
+  t.plan(8)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const toPublish = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 2,
+    messageId: 42,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+  let brokerClient = null
+
+  broker.on('client', function (client) {
+    brokerClient = client
+
+    brokerClient.on('error', function (err) {
+      t.error(err)
+    })
+  })
+
+  const subscriber = connect(setup(broker), { clean: true })
+
+  subscribe(t, subscriber, 'hello', 2, function () {
+    t.pass('subscribed')
+    receive(t, subscriber, toPublish)
+    brokerClient.publish(toPublish, function (err) {
+      t.error(err)
+    })
+  })
+})
+
+test('call published method with client with QoS 2', function (t) {
+  t.plan(9)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const toPublish = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 2,
+    messageId: 42,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+
+  broker.published = function (packet, client, cb) {
+    // Client is null for all server publishes
+    if (packet.topic.split('/')[0] !== '$SYS') {
+      t.ok(client, 'client must be passed to published method')
+      cb()
+    }
+  }
+
+  subscribe(t, subscriber, 'hello', 2, function () {
+    publish(t, publisher, toPublish)
+
+    receive(t, subscriber, toPublish)
+  })
+})
+
+;[true, false].forEach(function (cleanSession) {
+  test(`authorized forward publish packets in QoS 2 [clean=${cleanSession}]`, function (t) {
+    t.plan(9)
+
+    const broker = aedes()
+    t.teardown(broker.close.bind(broker))
+
+    const opts = { clean: cleanSession }
+    const publisher = connect(setup(broker), { clientId: 'my-client-xyz-8' })
+    const subscriber = connect(setup(broker), { ...opts, clientId: 'abcde' })
+    const forwarded = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2,
+      retain: false,
+      dup: false,
+      messageId: undefined,
+      clientId: 'my-client-xyz-8'
+    }
+    const expected = {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2,
+      retain: false,
+      length: 14,
+      dup: false
+    }
+    broker.authorizeForward = function (client, packet) {
+      forwarded.brokerId = broker.id
+      forwarded.brokerCounter = broker.counter
+      delete packet.nl
+      t.same(packet, forwarded, 'forwarded packet must match')
+      return packet
+    }
+
+    subscribe(t, subscriber, 'hello', 2, function () {
+      subscriber.outStream.once('data', function (packet) {
+        t.not(packet.messageId, 42)
+        delete packet.messageId
+        t.same(packet, expected, 'packet must match')
+      })
+
+      publish(t, publisher, {
+        cmd: 'publish',
+        topic: 'hello',
+        payload: Buffer.from('world'),
+        qos: 2,
+        retain: false,
+        messageId: 42,
+        dup: false
+      }, function () {
+        const stream = broker.persistence.outgoingStream({ id: 'abcde' })
+        stream.pipe(concat(function (list) {
+          if (cleanSession) {
+            t.equal(list.length, 0, 'should have empty item in queue')
+          } else {
+            t.equal(list.length, 1, 'should have one item in queue')
+          }
+        }))
+      })
+    })
+  })
+})
+
+;[true, false].forEach(function (cleanSession) {
+  test(`unauthorized forward publish packets in QoS 2 [clean=${cleanSession}]`, function (t) {
+    t.plan(6)
+
+    const broker = aedes()
+    t.teardown(broker.close.bind(broker))
+
+    const opts = { clean: cleanSession }
+
+    const publisher = connect(setup(broker))
+    const subscriber = connect(setup(broker), { ...opts, clientId: 'abcde' })
+
+    broker.authorizeForward = function (client, packet) {
+
+    }
+
+    subscribe(t, subscriber, 'hello', 2, function () {
+      subscriber.outStream.once('data', function (packet) {
+        t.fail('should not receive any packets')
+      })
+
+      publish(t, publisher, {
+        cmd: 'publish',
+        topic: 'hello',
+        payload: Buffer.from('world'),
+        qos: 2,
+        retain: false,
+        messageId: 42,
+        dup: false
+      }, function () {
+        const stream = broker.persistence.outgoingStream({ id: 'abcde' })
+        stream.pipe(concat(function (list) {
+          t.equal(list.length, 0, 'should empty in queue')
+        }))
+      })
+    })
+  })
+})
+
+test('subscribe QoS 0, but publish QoS 2', function (t) {
+  t.plan(6)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    dup: false,
+    length: 12,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 0, function () {
+    subscriber.outStream.once('data', function (packet) {
+      t.same(packet, expected, 'packet must match')
+    })
+
+    publish(t, publisher, {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2,
+      retain: false,
+      messageId: 42,
+      dup: false
+    })
+  })
+})
+
+test('subscribe QoS 1, but publish QoS 2', function (t) {
+  t.plan(6)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.outStream.once('data', function (packet) {
+      delete packet.messageId
+      t.same(packet, expected, 'packet must match')
+    })
+
+    publish(t, publisher, {
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      qos: 2,
+      retain: false,
+      messageId: 42,
+      dup: false
+    })
+  })
+})
+
+test('restore QoS 2 subscriptions not clean', function (t) {
+  t.plan(9)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 2,
+    dup: false,
+    length: 14,
+    messageId: 42,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 2, function () {
+    subscriber.inStream.end()
+
+    const publisher = connect(setup(broker))
+
+    subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' }, function (connect) {
+      t.equal(connect.sessionPresent, true, 'session present is set to true')
+      publish(t, publisher, expected)
+    })
+
+    receive(t, subscriber, expected)
+  })
+})
+
+test('resend publish on non-clean reconnect QoS 2', function (t) {
+  t.plan(8)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const opts = { clean: false, clientId: 'abcde' }
+  let subscriber = connect(setup(broker), opts)
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 2,
+    dup: false,
+    length: 14,
+    messageId: 42,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 2, function () {
+    subscriber.inStream.end()
+
+    const publisher = connect(setup(broker))
+
+    publish(t, publisher, expected, function () {
+      subscriber = connect(setup(broker), opts)
+
+      receive(t, subscriber, expected)
+    })
+  })
+})
+
+test('resend pubrel on non-clean reconnect QoS 2', function (t) {
+  t.plan(9)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const opts = { clean: false, clientId: 'abcde' }
+  let subscriber = connect(setup(broker), opts)
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 2,
+    dup: false,
+    length: 14,
+    messageId: 42,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 2, function () {
+    subscriber.inStream.end()
+
+    const publisher = connect(setup(broker))
+
+    publish(t, publisher, expected, function () {
+      subscriber = connect(setup(broker), opts)
+
+      subscriber.outStream.once('data', function (packet) {
+        t.not(packet.messageId, expected.messageId, 'messageId must differ')
+
+        const msgId = packet.messageId
+        delete packet.messageId
+        delete expected.messageId
+        t.same(packet, expected, 'packet must match')
+
+        subscriber.inStream.write({
+          cmd: 'pubrec',
+          messageId: msgId
+        })
+
+        subscriber.outStream.once('data', function (packet) {
+          t.same(packet, {
+            cmd: 'pubrel',
+            messageId: msgId,
+            length: 2,
+            qos: 1,
+            retain: false,
+            dup: false
+          }, 'pubrel must match')
+
+          subscriber.inStream.end()
+
+          subscriber = connect(setup(broker), opts)
+
+          subscriber.outStream.once('data', function (packet) {
+            t.same(packet, {
+              cmd: 'pubrel',
+              messageId: msgId,
+              length: 2,
+              qos: 1,
+              retain: false,
+              dup: false
+            }, 'pubrel must match')
+
+            subscriber.inStream.write({
+              cmd: 'pubcomp',
+              messageId: msgId
+            })
+          })
+        })
+      })
+    })
+  })
+})
+
+test('publish after disconnection', function (t) {
+  t.plan(10)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const toPublish = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 2,
+    messageId: 42,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+  const toPublish2 = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('worl2'),
+    qos: 2,
+    messageId: 43,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 2, function () {
+    publish(t, publisher, toPublish)
+
+    receive(t, subscriber, toPublish, function () {
+      publish(t, publisher, toPublish2)
+    })
+  })
+})
+
+test('multiple publish and store one', function (t) {
+  t.plan(2)
+
+  const broker = aedes()
+
+  const sid = {
+    id: 'abcde'
+  }
+  const s = connect(setup(broker), { clientId: sid.id })
+  const toPublish = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 2,
+    retain: false,
+    dup: false,
+    messageId: 42
+  }
+
+  let count = 5
+  while (count--) {
+    s.inStream.write(toPublish)
+  }
+  let recvcnt = 0
+  s.outStream.on('data', function (packet) {
+    if (++recvcnt < 5) return
+    broker.close(function () {
+      broker.persistence.incomingGetPacket(sid, toPublish, function (err, origPacket) {
+        delete origPacket.brokerId
+        delete origPacket.brokerCounter
+        t.same(origPacket, toPublish, 'packet must match')
+        t.error(err)
+      })
+    })
+  })
+})
+
+test('packet is written to stream after being stored', function (t) {
+  const s = connect(setup())
+
+  const broker = s.broker
+
+  t.teardown(broker.close.bind(s.broker))
+
+  let packetStored = false
+
+  const fn = broker.persistence.incomingStorePacket.bind(broker.persistence)
+
+  s.broker.persistence.incomingStorePacket = function (client, packet, done) {
+    packetStored = true
+    t.pass('packet stored')
+    fn(client, packet, done)
+  }
+
+  const packet = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 2,
+    messageId: 42
+  }
+
+  publish(t, s, packet)
+
+  s.outStream.once('data', function (packet) {
+    t.equal(packet.cmd, 'pubrec', 'pubrec received')
+    t.equal(packetStored, true, 'after packet store')
+    t.end()
+  })
+})
+
+test('not send pubrec when persistence fails to store packet', function (t) {
+  t.plan(2)
+
+  const s = connect(setup())
+  const broker = s.broker
+
+  t.teardown(broker.close.bind(s.broker))
+
+  s.broker.persistence.incomingStorePacket = function (client, packet, done) {
+    t.pass('packet stored')
+    done(new Error('store error'))
+  }
+  s.broker.on('clientError', function (client, err) {
+    t.equal(err.message, 'store error')
+  })
+
+  const packet = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 2,
+    messageId: 42
+  }
+
+  s.inStream.write(packet)
+  s.outStream.once('data', function (packet) {
+    t.fail('should not have pubrec')
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/test/regr-21.js b/mqtt-backend/node_modules/aedes/test/regr-21.js
new file mode 100644
index 0000000..546392b
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/regr-21.js
@@ -0,0 +1,34 @@
+'use strict'
+
+const { test } = require('tap')
+const { setup, connect } = require('./helper')
+
+test('after an error, outstanding packets are discarded', function (t) {
+  t.plan(1)
+
+  const s = connect(setup(), {
+    keepalive: 1000
+  })
+  t.teardown(s.broker.close.bind(s.broker))
+
+  const packet = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world'
+  }
+
+  s.broker.mq.on('hello', function (msg, cb) {
+    t.pass('first msg received')
+    s.inStream.destroy(new Error('something went wrong'))
+    cb()
+    setImmediate(() => {
+      packet.topic = 'foo'
+      s.inStream.write(packet)
+      s.inStream.write(packet)
+    })
+  })
+  s.broker.mq.on('foo', function (msg, cb) {
+    t.fail('msg received')
+  })
+  s.inStream.write(packet)
+})
diff --git a/mqtt-backend/node_modules/aedes/test/retain.js b/mqtt-backend/node_modules/aedes/test/retain.js
new file mode 100644
index 0000000..4f840d5
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/retain.js
@@ -0,0 +1,713 @@
+'use strict'
+
+const { test } = require('tap')
+const { through } = require('../lib/utils')
+const Faketimers = require('@sinonjs/fake-timers')
+const { setup, connect, subscribe, noError } = require('./helper')
+const aedes = require('../')
+
+// [MQTT-3.3.1-9]
+test('live retain packets', function (t) {
+  t.plan(5)
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    retain: false,
+    dup: false,
+    length: 12,
+    qos: 0
+  }
+
+  const s = noError(connect(setup()), t)
+  t.teardown(s.broker.close.bind(s.broker))
+
+  subscribe(t, s, 'hello', 0, function () {
+    s.outStream.on('data', function (packet) {
+      t.same(packet, expected)
+    })
+
+    s.broker.publish({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: Buffer.from('world'),
+      retain: true,
+      dup: false,
+      length: 12,
+      qos: 0
+    }, function () {
+      t.pass('publish finished')
+    })
+  })
+})
+
+test('retain messages', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    dup: false,
+    length: 12,
+    retain: true
+  }
+
+  broker.subscribe('hello', function (packet, cb) {
+    cb()
+
+    // defer this or it will receive the message which
+    // is being published
+    setImmediate(function () {
+      subscribe(t, subscriber, 'hello', 0, function () {
+        subscriber.outStream.once('data', function (packet) {
+          t.same(packet, expected, 'packet must match')
+        })
+      })
+    })
+  })
+
+  publisher.inStream.write(expected)
+})
+
+test('retain messages propagates through broker subscriptions', function (t) {
+  t.plan(1)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    dup: false,
+    retain: true
+  }
+
+  const subscriberFunc = function (packet, cb) {
+    packet = Object.assign({}, packet)
+    delete packet.brokerId
+    delete packet.brokerCounter
+    cb()
+    setImmediate(function () {
+      t.same(packet, expected, 'packet must not have been modified')
+    })
+  }
+
+  broker.subscribe('hello', subscriberFunc, function () {
+    broker.publish(expected)
+  })
+})
+
+test('avoid wrong deduping of retain messages', function (t) {
+  t.plan(7)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    dup: false,
+    length: 12,
+    retain: true
+  }
+
+  broker.subscribe('hello', function (packet, cb) {
+    cb()
+    // subscribe and publish another topic
+    subscribe(t, subscriber, 'hello2', 0, function () {
+      cb()
+
+      publisher.inStream.write({
+        cmd: 'publish',
+        topic: 'hello2',
+        payload: Buffer.from('world'),
+        qos: 0,
+        dup: false
+      })
+
+      subscriber.outStream.once('data', function (packet) {
+        subscribe(t, subscriber, 'hello', 0, function () {
+          subscriber.outStream.once('data', function (packet) {
+            t.same(packet, expected, 'packet must match')
+          })
+        })
+      })
+    })
+  })
+
+  publisher.inStream.write(expected)
+})
+
+test('reconnected subscriber will not receive retained messages when QoS 0 and clean', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker), { clean: true })
+  let subscriber = connect(setup(broker), { clean: true })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: false,
+    dup: false,
+    length: 12
+  }
+  subscribe(t, subscriber, 'hello', 0, function () {
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 0,
+      retain: false
+    })
+    subscriber.outStream.once('data', function (packet) {
+      t.same(packet, expected, 'packet must match')
+      subscriber.inStream.end()
+      publisher.inStream.write({
+        cmd: 'publish',
+        topic: 'hello',
+        payload: 'foo',
+        qos: 0,
+        retain: true
+      })
+      subscriber = connect(setup(broker), { clean: true })
+      subscriber.outStream.on('data', function (packet) {
+        t.fail('should not received retain message')
+      })
+    })
+  })
+})
+
+test('subscriber will not receive retained messages when QoS is 128', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const pubPacket = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 1,
+    retain: true,
+    messageId: 42
+  }
+
+  broker.authorizeSubscribe = function (client, sub, callback) {
+    if (sub.topic === pubPacket.topic) {
+      callback(null, null)
+    } else {
+      callback(null, sub)
+    }
+  }
+
+  const publisher = connect(setup(broker), { clean: true })
+
+  publisher.inStream.write(pubPacket)
+
+  publisher.outStream.on('data', function (packet) {
+    const subscriber = connect(setup(broker), { clean: true })
+    subscribe(t, subscriber, pubPacket.topic, 128, function () {
+      subscriber.outStream.on('data', function (packet) {
+        t.fail('should not received retain message')
+      })
+    })
+  })
+})
+
+// [MQTT-3.3.1-6]
+test('new QoS 0 subscribers receive QoS 0 retained messages when clean', function (t) {
+  t.plan(9)
+
+  const clock = Faketimers.createClock()
+  const broker = aedes()
+  t.teardown(function () {
+    clock.reset()
+    broker.close()
+  })
+
+  const publisher = connect(setup(broker), { clean: true })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello/world',
+    payload: Buffer.from('big big world'),
+    qos: 0,
+    retain: true,
+    dup: false,
+    length: 26
+  }
+  publisher.inStream.write({
+    cmd: 'publish',
+    topic: 'hello/world',
+    payload: 'big big world',
+    qos: 0,
+    retain: true
+  })
+  const subscriber1 = connect(setup(broker), { clean: true })
+  subscribe(t, subscriber1, 'hello/world', 0, function () {
+    subscriber1.outStream.on('data', function (packet) {
+      t.same(packet, expected, 'packet must match')
+      clock.tick(100)
+    })
+  })
+  const subscriber2 = connect(setup(broker), { clean: true })
+  subscribe(t, subscriber2, 'hello/+', 0, function () {
+    subscriber2.outStream.on('data', function (packet) {
+      t.same(packet, expected, 'packet must match')
+      clock.tick(100)
+    })
+  })
+
+  clock.setTimeout(() => {
+    t.equal(broker.counter, 9)
+  }, 200)
+})
+
+// [MQTT-3.3.1-5]
+test('new QoS 0 subscribers receive downgraded QoS 1 retained messages when clean', function (t) {
+  t.plan(6)
+
+  const broker = aedes()
+
+  const publisher = connect(setup(broker), { clean: true })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: true,
+    dup: false,
+    length: 12
+  }
+  publisher.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 1,
+    retain: true,
+    messageId: 42
+  })
+  publisher.outStream.on('data', function (packet) {
+    const subscriber = connect(setup(broker), { clean: true })
+    subscribe(t, subscriber, 'hello', 0, function () {
+      subscriber.outStream.on('data', function (packet) {
+        t.not(packet.messageId, 42, 'messageId should not be the same')
+        delete packet.messageId
+        t.same(packet, expected, 'packet must match')
+        broker.close()
+      })
+    })
+  })
+  broker.on('closed', function () {
+    t.equal(broker.counter, 8)
+  })
+})
+
+// [MQTT-3.3.1-10]
+test('clean retained messages', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker), { clean: true })
+  publisher.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 0,
+    retain: true
+  })
+  publisher.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: '',
+    qos: 0,
+    retain: true
+  })
+  const subscriber = connect(setup(broker), { clean: true })
+  subscribe(t, subscriber, 'hello', 0, function () {
+    subscriber.outStream.once('data', function (packet) {
+      t.fail('should not received retain message')
+    })
+  })
+})
+
+// [MQTT-3.3.1-11]
+test('broker not store zero-byte retained messages', function (t) {
+  t.plan(0)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = connect(setup(broker))
+
+  s.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: '',
+    retain: true
+  })
+  s.broker.on('publish', function (packet, client) {
+    if (packet.topic.startsWith('$SYS/')) {
+      return
+    }
+    const stream = s.broker.persistence.createRetainedStream(packet.topic)
+    stream.pipe(through(function sendRetained (packet, enc, cb) {
+      t.fail('not store zero-byte retained messages')
+    }))
+  })
+})
+
+test('fail to clean retained messages without retain flag', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker), { clean: true })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    retain: true,
+    dup: false,
+    length: 12
+  }
+  publisher.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 0,
+    retain: true
+  })
+  publisher.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: '',
+    qos: 0,
+    retain: false
+  })
+  const subscriber = connect(setup(broker), { clean: true })
+  subscribe(t, subscriber, 'hello', 0, function () {
+    subscriber.outStream.on('data', function (packet) {
+      t.same(packet, expected, 'packet must match')
+    })
+  })
+})
+
+test('only get the last retained messages in same topic', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker), { clean: true })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('foo'),
+    qos: 0,
+    retain: true,
+    dup: false,
+    length: 10
+  }
+  publisher.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 0,
+    retain: true
+  })
+  publisher.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'foo',
+    qos: 0,
+    retain: true
+  })
+  const subscriber = connect(setup(broker), { clean: true })
+  subscribe(t, subscriber, 'hello', 0, function () {
+    subscriber.outStream.on('data', function (packet) {
+      t.same(packet, expected, 'packet must match')
+    })
+  })
+})
+
+test('deliver QoS 1 retained messages to new subscriptions', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    dup: false,
+    length: 14,
+    retain: true
+  }
+
+  publisher.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: 'world',
+    qos: 1,
+    messageId: 42,
+    retain: true
+  })
+
+  publisher.outStream.on('data', function (packet) {
+    subscribe(t, subscriber, 'hello', 1, function () {
+      subscriber.outStream.once('data', function (packet) {
+        delete packet.messageId
+        t.same(packet, expected, 'packet must match')
+      })
+    })
+  })
+})
+
+test('deliver QoS 1 retained messages to established subscriptions', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    dup: false,
+    length: 14,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.outStream.once('data', function (packet) {
+      delete packet.messageId
+      t.same(packet, expected, 'packet must match')
+    })
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      messageId: 42,
+      retain: true
+    })
+  })
+})
+
+test('deliver QoS 0 retained message with QoS 1 subscription', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker))
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    dup: false,
+    length: 12,
+    retain: true
+  }
+
+  broker.mq.on('hello', function (msg, cb) {
+    cb()
+
+    // defer this or it will receive the message which
+    // is being published
+    setImmediate(function () {
+      subscribe(t, subscriber, 'hello', 1, function () {
+        subscriber.outStream.once('data', function (packet) {
+          t.same(packet, expected, 'packet must match')
+        })
+      })
+    })
+  })
+
+  publisher.inStream.write({
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    messageId: 42,
+    retain: true
+  })
+})
+
+test('disconnect and retain messages with QoS 1 [clean=false]', function (t) {
+  t.plan(7)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let subscriber = noError(connect(setup(broker), { clean: false, clientId: 'abcde' }), t)
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 1,
+    dup: false,
+    length: 14,
+    retain: true
+  }
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.inStream.write({
+      cmd: 'disconnect'
+    })
+
+    subscriber.outStream.on('data', function (packet) {
+      console.log('original', packet)
+    })
+
+    const publisher = noError(connect(setup(broker)), t)
+
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      messageId: 42,
+      retain: true
+    })
+
+    publisher.outStream.once('data', function (packet) {
+      t.equal(packet.cmd, 'puback')
+
+      subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' }, function (connect) {
+        t.equal(connect.sessionPresent, true, 'session present is set to true')
+      })
+
+      subscriber.outStream.once('data', function (packet) {
+        // receive any queued messages (no matter they are retained messages) at the disconnected time
+        t.not(packet.messageId, 42, 'messageId must differ')
+        delete packet.messageId
+        packet.length = 14
+        t.same(packet, expected, 'packet must match')
+
+        // there should be no messages come from restored subscriptions
+        subscriber.outStream.once('data', function (packet) {
+          t.fail('should not receive any more messages')
+        })
+      })
+    })
+  })
+})
+
+test('disconnect and two retain messages with QoS 1 [clean=false]', function (t) {
+  t.plan(15)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  let subscriber = noError(connect(setup(broker), { clean: false, clientId: 'abcde' }), t)
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    qos: 1,
+    dup: false,
+    length: 14,
+    retain: true
+  }
+
+  subscribe(t, subscriber, 'hello', 1, function () {
+    subscriber.inStream.write({
+      cmd: 'disconnect'
+    })
+
+    subscriber.outStream.on('data', function (packet) {
+      console.log('original', packet)
+    })
+
+    const publisher = noError(connect(setup(broker)), t)
+
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello',
+      payload: 'world',
+      qos: 1,
+      messageId: 41,
+      retain: true
+    })
+
+    publisher.outStream.once('data', function (packet) {
+      t.equal(packet.cmd, 'puback')
+
+      publisher.inStream.write({
+        cmd: 'publish',
+        topic: 'hello',
+        payload: 'world2',
+        qos: 1,
+        messageId: 42,
+        retain: true
+      })
+
+      publisher.outStream.once('data', function (packet) {
+        t.equal(packet.cmd, 'puback')
+
+        subscriber = connect(setup(broker), { clean: false, clientId: 'abcde' }, function (connect) {
+          t.equal(connect.sessionPresent, true, 'session present is set to true')
+        })
+
+        subscriber.outStream.once('data', function (packet) {
+          // receive any queued messages (included retained messages) at the disconnected time
+          t.not(packet.messageId, 41, 'messageId must differ')
+          delete packet.messageId
+          packet.length = 14
+          expected.payload = Buffer.from('world')
+          t.same(packet, expected, 'packet must match')
+
+          // receive any queued messages (included retained messages) at the disconnected time
+          subscriber.outStream.once('data', function (packet) {
+            t.not(packet.messageId, 42, 'messageId must differ')
+            delete packet.messageId
+            packet.length = 14
+            expected.payload = Buffer.from('world2')
+            t.same(packet, expected, 'packet must match')
+
+            // should get the last retained message when we do a subscribe
+            subscribe(t, subscriber, 'hello', 1, function () {
+              subscriber.outStream.on('data', function (packet) {
+                t.not(packet.messageId, 42, 'messageId must differ')
+                delete packet.messageId
+                packet.length = 14
+                expected.payload = Buffer.from('world2')
+                t.same(packet, expected, 'packet must match')
+              })
+            })
+          })
+        })
+      })
+    })
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/test/topics.js b/mqtt-backend/node_modules/aedes/test/topics.js
new file mode 100644
index 0000000..7f28cde
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/topics.js
@@ -0,0 +1,302 @@
+'use strict'
+
+const { test } = require('tap')
+const { setup, connect, subscribe } = require('./helper')
+const aedes = require('../')
+const { validateTopic } = require('../lib/utils')
+
+test('validation of `null` topic', function (t) {
+  // issue #780
+  t.plan(1)
+  const err = validateTopic(null, 'SUBSCRIBE')
+  t.equal(err.message, 'impossible to SUBSCRIBE to an empty topic')
+})
+
+// [MQTT-4.7.1-3]
+test('Single-level wildcard should match empty level', function (t) {
+  t.plan(4)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  subscribe(t, s, 'a/+/b', 0, function () {
+    s.outStream.once('data', function (packet) {
+      t.pass('ok')
+    })
+
+    s.inStream.write({
+      cmd: 'publish',
+      topic: 'a//b',
+      payload: 'world'
+    })
+  })
+})
+
+// [MQTT-4.7.3-1]
+test('publish empty topic', function (t) {
+  t.plan(4)
+
+  const s = connect(setup())
+
+  subscribe(t, s, '#', 0, function () {
+    s.outStream.once('data', function (packet) {
+      t.fail('no packet')
+    })
+
+    s.inStream.write({
+      cmd: 'publish',
+      topic: '',
+      payload: 'world'
+    })
+
+    s.broker.close(function () {
+      t.equal(s.broker.connectedClients, 0, 'no connected clients')
+    })
+  })
+})
+
+test('publish invalid topic with #', function (t) {
+  t.plan(4)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  subscribe(t, s, '#', 0, function () {
+    s.outStream.once('data', function (packet) {
+      t.fail('no packet')
+    })
+
+    s.inStream.write({
+      cmd: 'publish',
+      topic: 'hello/#',
+      payload: 'world'
+    })
+  })
+
+  s.broker.on('clientError', function () {
+    t.pass('raise an error')
+  })
+})
+
+test('publish invalid topic with +', function (t) {
+  t.plan(4)
+
+  const s = connect(setup())
+  t.teardown(s.broker.close.bind(s.broker))
+
+  subscribe(t, s, '#', 0, function () {
+    s.outStream.once('data', function (packet) {
+      t.fail('no packet')
+    })
+
+    s.inStream.write({
+      cmd: 'publish',
+      topic: 'hello/+/eee',
+      payload: 'world'
+    })
+  })
+
+  s.broker.on('clientError', function () {
+    t.pass('raise an error')
+  })
+})
+
+;['base/#/sub', 'base/#sub', 'base/sub#', 'base/xyz+/sub', 'base/+xyz/sub', ''].forEach(function (topic) {
+  test('subscribe to invalid topic with "' + topic + '"', function (t) {
+    t.plan(1)
+
+    const s = connect(setup())
+    t.teardown(s.broker.close.bind(s.broker))
+
+    s.broker.on('clientError', function () {
+      t.pass('raise an error')
+    })
+
+    s.inStream.write({
+      cmd: 'subscribe',
+      messageId: 24,
+      subscriptions: [{
+        topic,
+        qos: 0
+      }]
+    })
+  })
+
+  test('unsubscribe to invalid topic with "' + topic + '"', function (t) {
+    t.plan(1)
+
+    const s = connect(setup())
+    t.teardown(s.broker.close.bind(s.broker))
+
+    s.broker.on('clientError', function () {
+      t.pass('raise an error')
+    })
+
+    s.inStream.write({
+      cmd: 'unsubscribe',
+      messageId: 24,
+      unsubscriptions: [topic]
+    })
+  })
+})
+
+test('topics are case-sensitive', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const publisher = connect(setup(broker), { clean: true })
+  const subscriber = connect(setup(broker), { clean: true })
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello',
+    payload: Buffer.from('world'),
+    qos: 0,
+    dup: false,
+    length: 12,
+    retain: false
+  }
+
+  subscribe(t, subscriber, 'hello', 0, function () {
+    subscriber.outStream.on('data', function (packet) {
+      t.same(packet, expected, 'packet mush match')
+    })
+    ;['hello', 'HELLO', 'heLLo', 'HELLO/#', 'hello/+'].forEach(function (topic) {
+      publisher.inStream.write({
+        cmd: 'publish',
+        topic,
+        payload: 'world',
+        qos: 0,
+        retain: false
+      })
+    })
+  })
+})
+
+function subscribeMultipleTopics (t, broker, qos, subscriber, subscriptions, done) {
+  const publisher = connect(setup(broker))
+  subscriber.inStream.write({
+    cmd: 'subscribe',
+    messageId: 24,
+    subscriptions
+  })
+
+  subscriber.outStream.once('data', function (packet) {
+    t.equal(packet.cmd, 'suback')
+    t.same(packet.granted, subscriptions.map(obj => obj.qos))
+    t.equal(packet.messageId, 24)
+
+    publisher.inStream.write({
+      cmd: 'publish',
+      topic: 'hello/world',
+      payload: 'world',
+      qos,
+      messageId: 42
+    })
+
+    if (done) {
+      done(null, packet)
+    }
+  })
+}
+
+test('Overlapped topics with same QoS', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello/world',
+    payload: Buffer.from('world'),
+    qos: 1,
+    dup: false,
+    length: 20,
+    retain: false
+  }
+  const sub = [
+    { topic: 'hello/world', qos: 1 },
+    { topic: 'hello/#', qos: 1 }]
+  subscribeMultipleTopics(t, broker, 1, subscriber, sub, function () {
+    subscriber.outStream.on('data', function (packet) {
+      delete packet.messageId
+      t.same(packet, expected, 'packet must match')
+    })
+  })
+})
+
+// [MQTT-3.3.5-1]
+test('deliver overlapped topics respecting the maximum QoS of all the matching subscriptions - QoS 0 publish', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello/world',
+    payload: Buffer.from('world'),
+    qos: 0,
+    dup: false,
+    length: 18,
+    retain: false
+  }
+  const sub = [
+    { topic: 'hello/world', qos: 0 },
+    { topic: 'hello/#', qos: 2 }]
+  subscribeMultipleTopics(t, broker, 0, subscriber, sub, function () {
+    subscriber.outStream.on('data', function (packet) {
+      delete packet.messageId
+      t.same(packet, expected, 'packet must match')
+    })
+  })
+})
+
+// [MQTT-3.3.5-1]
+test('deliver overlapped topics respecting the maximum QoS of all the matching subscriptions - QoS 2 publish', function (t) {
+  t.plan(3)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const subscriber = connect(setup(broker))
+
+  const sub = [
+    { topic: 'hello/world', qos: 0 },
+    { topic: 'hello/#', qos: 2 }]
+  subscribeMultipleTopics(t, broker, 2, subscriber, sub, function () {
+    subscriber.outStream.on('data', function () {
+      t.fail('should receive messages with the maximum QoS')
+    })
+  })
+})
+
+test('Overlapped topics with QoS downgrade', function (t) {
+  t.plan(4)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const subscriber = connect(setup(broker))
+  const expected = {
+    cmd: 'publish',
+    topic: 'hello/world',
+    payload: Buffer.from('world'),
+    qos: 0,
+    dup: false,
+    length: 18,
+    retain: false
+  }
+  const sub = [
+    { topic: 'hello/world', qos: 1 },
+    { topic: 'hello/#', qos: 1 }]
+  subscribeMultipleTopics(t, broker, 0, subscriber, sub, function () {
+    subscriber.outStream.on('data', function (packet) {
+      t.same(packet, expected, 'packet must match')
+    })
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/test/types/aedes.test-d.ts b/mqtt-backend/node_modules/aedes/test/types/aedes.test-d.ts
new file mode 100644
index 0000000..cc14591
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/types/aedes.test-d.ts
@@ -0,0 +1,224 @@
+import { IncomingMessage } from 'node:http'
+import { Socket } from 'node:net'
+import type {
+  Brokers,
+  AuthenticateError,
+  Client,
+  Connection
+} from '../../aedes'
+import Aedes, { AedesOptions, createBroker } from '../../aedes'
+import type { AedesPublishPacket, ConnackPacket, ConnectPacket, PingreqPacket, PublishPacket, PubrelPacket, Subscription, SubscribePacket, UnsubscribePacket } from '../../types/packet'
+import { expectType } from 'tsd'
+
+// Test for createBroker function
+expectType<(options?: AedesOptions) => Aedes>(createBroker)
+
+// Aedes server
+let broker = createBroker()
+expectType<Aedes>(broker)
+
+broker = new Aedes({
+  id: 'aedes',
+  concurrency: 100,
+  heartbeatInterval: 60000,
+  connectTimeout: 30000,
+  maxClientsIdLength: 23,
+  keepaliveLimit: 0,
+  preConnect: (client: Client, packet: ConnectPacket, callback) => {
+    if (client.req) {
+      callback(new Error('not websocket stream'), false)
+    }
+    if (client.conn instanceof Socket && client.conn.remoteAddress === '::1') {
+      callback(null, true)
+    } else {
+      callback(new Error('connection error'), false)
+    }
+  },
+  authenticate: (
+    client: Client,
+    username: Readonly<string | undefined>,
+    password: Readonly<Buffer | undefined>,
+    callback
+  ) => {
+    if (
+      username === 'test' &&
+      password === Buffer.from('test') &&
+      client.version === 4
+    ) {
+      callback(null, true)
+    } else {
+      const error = new Error() as AuthenticateError
+      error.returnCode = 1
+
+      callback(error, false)
+    }
+  },
+  authorizePublish: (
+    client: Client | null,
+    packet: PublishPacket,
+    callback
+  ) => {
+    if (packet.topic === 'aaaa') {
+      return callback(new Error('wrong topic'))
+    }
+
+    if (packet.topic === 'bbb') {
+      packet.payload = Buffer.from('overwrite packet payload')
+    }
+
+    callback(null)
+  },
+  authorizeSubscribe: (client: Client, sub: Subscription, callback) => {
+    if (sub.topic === 'aaaa') {
+      return callback(new Error('wrong topic'))
+    }
+
+    if (sub.topic === 'bbb') {
+      // overwrites subscription
+      sub.qos = 2
+    }
+
+    callback(null, sub)
+  },
+  authorizeForward: (client: Client, packet: AedesPublishPacket) => {
+    if (packet.topic === 'aaaa' && client.id === 'I should not see this') {
+      return null
+      // also works with return undefined
+    } else if (
+      packet.topic === 'aaaa' &&
+      client.id === 'I should not see this either'
+    ) {
+      return
+    }
+
+    if (packet.topic === 'bbb') {
+      packet.payload = Buffer.from('overwrite packet payload')
+    }
+
+    return packet
+  },
+  published: (packet: AedesPublishPacket, client: Client, callback) => {
+    callback(null)
+    callback(new Error())
+  }
+})
+
+expectType<Aedes>(broker)
+
+expectType<Readonly<Brokers>>(broker.brokers)
+
+expectType<Aedes>(broker.on('closed', () => {}))
+expectType<Aedes>(broker.on('client', (client: Client) => {}))
+expectType<Aedes>(broker.on('clientReady', (client: Client) => {}))
+expectType<Aedes>(broker.on('clientDisconnect', (client: Client) => {}))
+expectType<Aedes>(broker.on('keepaliveTimeout', (client: Client) => {}))
+expectType<Aedes>(
+  broker.on('clientError', (client: Client, error: Error) => {})
+)
+expectType<Aedes>(
+  broker.on('connectionError', (client: Client, error: Error) => {})
+)
+expectType<Aedes>(
+  broker.on('connackSent', (packet: ConnackPacket, client: Client) => {})
+)
+expectType<Aedes>(
+  broker.on('ping', (packet: PingreqPacket, client: Client) => {})
+)
+expectType<Aedes>(
+  broker.on(
+    'publish',
+    (packet: AedesPublishPacket, client: Client | null) => {}
+  )
+)
+expectType<Aedes>(
+  broker.on('ack', (packet: PublishPacket | PubrelPacket, client: Client) => {})
+)
+expectType<Aedes>(
+  broker.on('subscribe', (subscriptions: Subscription[], client: Client) => {})
+)
+expectType<Aedes>(
+  broker.on('unsubscribe', (unsubscriptions: string[], client: Client) => {})
+)
+
+expectType<void>(
+  broker.publish({} as PublishPacket, (error?: Error) => {
+    if (error) {
+      console.error(error)
+    }
+  })
+)
+
+expectType<void>(
+  broker.subscribe(
+    'topic',
+    (packet: AedesPublishPacket, callback: () => void) => {},
+    () => {}
+  )
+)
+
+expectType<void>(
+  broker.unsubscribe(
+    'topic',
+    (packet: AedesPublishPacket, callback: () => void) => {},
+    () => {}
+  )
+)
+
+expectType<void>(broker.close())
+expectType<void>(broker.close(() => {}))
+
+// Aedes client
+const client = broker.handle({} as Connection, {} as IncomingMessage)
+const client2 = broker.handle({} as Connection)
+
+expectType<Client>(client)
+expectType<Client>(client2)
+
+expectType<Connection>(client.conn)
+expectType<IncomingMessage>(client.req!)
+
+expectType<Client>(client.on('connected', () => {}))
+expectType<Client>(
+  client.on('error', (error: Error) => {
+    if (error) {
+      console.error(error)
+    }
+  })
+)
+
+expectType<void>(
+  client.publish({} as PublishPacket, (error?: Error) => {
+    if (error) {
+      console.error(error)
+    }
+  })
+)
+expectType<void>(client.publish({} as PublishPacket))
+
+expectType<void>(
+  client.subscribe({} as Subscription, (error?: Error) => {
+    if (error) {
+      console.error(error)
+    }
+  })
+)
+expectType<void>(client.subscribe({} as Subscription))
+expectType<void>(client.subscribe([] as Subscription[]))
+expectType<void>(client.subscribe({} as SubscribePacket))
+
+expectType<void>(
+  client.unsubscribe({} as Subscription, (error?: Error) => {
+    if (error) {
+      console.error(error)
+    }
+  })
+)
+expectType<void>(client.unsubscribe({} as Subscription))
+expectType<void>(client.unsubscribe([] as Subscription[]))
+expectType<void>(client.unsubscribe({} as UnsubscribePacket))
+
+expectType<void>(client.emptyOutgoingQueue())
+expectType<void>(client.emptyOutgoingQueue(() => {}))
+
+expectType<void>(client.close())
+expectType<void>(client.close(() => {}))
diff --git a/mqtt-backend/node_modules/aedes/test/will.js b/mqtt-backend/node_modules/aedes/test/will.js
new file mode 100644
index 0000000..368544f
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/test/will.js
@@ -0,0 +1,601 @@
+'use strict'
+
+const { test } = require('tap')
+const memory = require('aedes-persistence')
+const Faketimers = require('@sinonjs/fake-timers')
+const { setup, connect, noError } = require('./helper')
+const aedes = require('../')
+
+function willConnect (s, opts, connected) {
+  opts = opts || {}
+  opts.will = {
+    topic: 'mywill',
+    payload: Buffer.from('last will'),
+    qos: 0,
+    retain: false
+  }
+
+  return connect(s, opts, connected)
+}
+
+test('delivers a will', function (t) {
+  t.plan(4)
+
+  const opts = {}
+  // willConnect populates opts with a will
+  const s = willConnect(setup(),
+    opts,
+    function () {
+      s.conn.destroy()
+    }
+  )
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.mq.on('mywill', function (packet, cb) {
+    t.equal(packet.topic, opts.will.topic, 'topic matches')
+    t.same(packet.payload, opts.will.payload, 'payload matches')
+    t.equal(packet.qos, opts.will.qos, 'qos matches')
+    t.equal(packet.retain, opts.will.retain, 'retain matches')
+    cb()
+  })
+})
+
+test('calling close two times should not deliver two wills', function (t) {
+  t.plan(4)
+
+  const opts = {}
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('client', function (client) {
+    client.close()
+    client.close()
+  })
+
+  broker.mq.on('mywill', onWill)
+
+  // willConnect populates opts with a will
+  willConnect(setup(broker), opts)
+
+  function onWill (packet, cb) {
+    broker.mq.removeListener('mywill', onWill, function () {
+      broker.mq.on('mywill', function (packet) {
+        t.fail('the will must be delivered only once')
+      })
+    })
+    t.equal(packet.topic, opts.will.topic, 'topic matches')
+    t.same(packet.payload, opts.will.payload, 'payload matches')
+    t.equal(packet.qos, opts.will.qos, 'qos matches')
+    t.equal(packet.retain, opts.will.retain, 'retain matches')
+    cb()
+  }
+})
+
+test('delivers old will in case of a crash', function (t) {
+  t.plan(8)
+
+  const persistence = memory()
+  const will = {
+    topic: 'mywill',
+    payload: Buffer.from('last will'),
+    qos: 0,
+    retain: false
+  }
+
+  persistence.broker = {
+    id: 'anotherBroker'
+  }
+
+  persistence.putWill({
+    id: 'myClientId42'
+  }, will, function (err) {
+    t.error(err, 'no error')
+
+    let authorized = false
+    const interval = 10 // ms, so that the will check happens fast!
+    const broker = aedes({
+      persistence,
+      heartbeatInterval: interval,
+      authorizePublish: function (client, packet, callback) {
+        t.strictSame(client, null, 'client must be null')
+        authorized = true
+        callback(null)
+      }
+    })
+    t.teardown(broker.close.bind(broker))
+
+    const start = Date.now()
+
+    broker.mq.on('mywill', check)
+
+    function check (packet, cb) {
+      broker.mq.removeListener('mywill', check, function () {
+        broker.mq.on('mywill', function (packet) {
+          t.fail('the will must be delivered only once')
+        })
+      })
+      t.ok(Date.now() - start >= 3 * interval, 'the will needs to be emitted after 3 heartbeats')
+      t.equal(packet.topic, will.topic, 'topic matches')
+      t.same(packet.payload, will.payload, 'payload matches')
+      t.equal(packet.qos, will.qos, 'qos matches')
+      t.equal(packet.retain, will.retain, 'retain matches')
+      t.equal(authorized, true, 'authorization called')
+      cb()
+    }
+  })
+})
+
+test('deliver old will without authorization in case of a crash', function (t) {
+  t.plan(2)
+
+  const persistence = memory()
+  const will = {
+    topic: 'mywill',
+    payload: Buffer.from('last will'),
+    qos: 0,
+    retain: false
+  }
+
+  persistence.broker = {
+    id: 'anotherBroker'
+  }
+
+  persistence.putWill({
+    id: 'myClientId42'
+  }, will, function (err) {
+    t.error(err, 'no error')
+
+    const interval = 10 // ms, so that the will check happens fast!
+    const broker = aedes({
+      persistence,
+      heartbeatInterval: interval,
+      authorizePublish: function (client, packet, callback) {
+        t.strictSame(client, null, 'client must be null')
+        callback(new Error())
+      }
+    })
+
+    t.teardown(broker.close.bind(broker))
+
+    broker.mq.on('mywill', check)
+
+    function check (packet, cb) {
+      t.fail('received will without authorization')
+      cb()
+    }
+  })
+})
+
+test('delete old broker', function (t) {
+  t.plan(1)
+
+  const clock = Faketimers.install()
+
+  const heartbeatInterval = 100
+  const broker = aedes({
+    heartbeatInterval
+  })
+  t.teardown(broker.close.bind(broker))
+
+  const brokerId = 'dummyBroker'
+
+  broker.brokers[brokerId] = Date.now() - heartbeatInterval * 3.5
+
+  setTimeout(() => {
+    t.equal(broker.brokers[brokerId], undefined, 'Broker deleted')
+  }, heartbeatInterval * 4)
+
+  clock.tick(heartbeatInterval * 4)
+
+  clock.uninstall()
+})
+
+test('store the will in the persistence', function (t) {
+  t.plan(5)
+
+  const opts = {
+    clientId: 'abcde'
+  }
+
+  // willConnect populates opts with a will
+  const s = willConnect(setup(), opts)
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.on('client', function () {
+    // this is connack
+    s.broker.persistence.getWill({
+      id: opts.clientId
+    }, function (err, packet) {
+      t.error(err, 'no error')
+      t.same(packet.topic, opts.will.topic, 'will topic matches')
+      t.same(packet.payload, opts.will.payload, 'will payload matches')
+      t.same(packet.qos, opts.will.qos, 'will qos matches')
+      t.same(packet.retain, opts.will.retain, 'will retain matches')
+    })
+  })
+})
+
+test('delete the will in the persistence after publish', function (t) {
+  t.plan(2)
+
+  const opts = {
+    clientId: 'abcde'
+  }
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  broker.on('client', function (client) {
+    setImmediate(function () {
+      client.close()
+    })
+  })
+
+  broker.mq.on('mywill', check)
+
+  // willConnect populates opts with a will
+  willConnect(setup(broker), opts)
+
+  function check (packet, cb) {
+    broker.mq.removeListener('mywill', check, function () {
+      broker.persistence.getWill({
+        id: opts.clientId
+      }, function (err, p) {
+        t.error(err, 'no error')
+        t.notOk(p, 'packet is empty')
+      })
+    })
+    cb()
+  }
+})
+
+test('delivers a will with authorization', function (t) {
+  t.plan(6)
+
+  let authorized = false
+  const opts = {}
+  // willConnect populates opts with a will
+  const s = willConnect(
+    setup(aedes({
+      authorizePublish: (client, packet, callback) => {
+        authorized = true
+        callback(null)
+      }
+    })),
+    opts,
+    function () {
+      s.conn.destroy()
+    }
+  )
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.on('clientDisconnect', function (client) {
+    t.equal(client.connected, false)
+  })
+
+  s.broker.mq.on('mywill', function (packet, cb) {
+    t.equal(packet.topic, opts.will.topic, 'topic matches')
+    t.same(packet.payload, opts.will.payload, 'payload matches')
+    t.equal(packet.qos, opts.will.qos, 'qos matches')
+    t.equal(packet.retain, opts.will.retain, 'retain matches')
+    t.equal(authorized, true, 'authorization called')
+    cb()
+  })
+})
+
+test('delivers a will waits for authorization', function (t) {
+  t.plan(6)
+
+  let authorized = false
+  const opts = {}
+  // willConnect populates opts with a will
+  const s = willConnect(
+    setup(aedes({
+      authorizePublish: (client, packet, callback) => {
+        authorized = true
+        setImmediate(() => { callback(null) })
+      }
+    })),
+    opts,
+    function () {
+      s.conn.destroy()
+    }
+  )
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.on('clientDisconnect', function () {
+    t.pass('client is disconnected')
+  })
+
+  s.broker.mq.on('mywill', function (packet, cb) {
+    t.equal(packet.topic, opts.will.topic, 'topic matches')
+    t.same(packet.payload, opts.will.payload, 'payload matches')
+    t.equal(packet.qos, opts.will.qos, 'qos matches')
+    t.equal(packet.retain, opts.will.retain, 'retain matches')
+    t.equal(authorized, true, 'authorization called')
+    cb()
+  })
+})
+
+test('does not deliver a will without authorization', function (t) {
+  t.plan(1)
+
+  let authorized = false
+  const opts = {}
+  // willConnect populates opts with a will
+  const s = willConnect(
+    setup(aedes({
+      authorizePublish: (username, packet, callback) => {
+        authorized = true
+        callback(new Error())
+      }
+    })),
+    opts,
+    function () {
+      s.conn.destroy()
+    }
+  )
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.on('clientDisconnect', function () {
+    t.equal(authorized, true, 'authorization called')
+  })
+
+  s.broker.mq.on('mywill', function (packet, cb) {
+    t.fail('received will without authorization')
+    cb()
+  })
+})
+
+test('does not deliver a will without authentication', function (t) {
+  t.plan(1)
+
+  let authenticated = false
+  const opts = {}
+  // willConnect populates opts with a will
+  const s = willConnect(
+    setup(aedes({
+      authenticate: (client, username, password, callback) => {
+        authenticated = true
+        callback(new Error(), false)
+      }
+    })),
+    opts
+  )
+  t.teardown(s.broker.close.bind(s.broker))
+
+  s.broker.on('clientError', function () {
+    t.equal(authenticated, true, 'authentication called')
+    t.end()
+  })
+
+  s.broker.mq.on('mywill', function (packet, cb) {
+    t.fail('received will without authentication')
+    cb()
+  })
+})
+
+test('does not deliver will if broker is closed during authentication', function (t) {
+  t.plan(0)
+
+  const opts = { keepalive: 1 }
+
+  const broker = aedes({
+    authenticate: function (client, username, password, callback) {
+      setTimeout(function () {
+        callback(null, true)
+      })
+      broker.close()
+    }
+  })
+
+  broker.on('keepaliveTimeout', function () {
+    t.fail('keepalive timer shoud not be set')
+  })
+
+  broker.mq.on('mywill', function (packet, cb) {
+    t.fail('Received will when it was not expected')
+    cb()
+  })
+
+  willConnect(setup(broker), opts)
+})
+
+// [MQTT-3.14.4-3]
+test('does not deliver will when client sends a DISCONNECT', function (t) {
+  t.plan(0)
+
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = noError(willConnect(setup(broker), {}, function () {
+    s.inStream.end({
+      cmd: 'disconnect'
+    })
+  }), t)
+
+  s.broker.mq.on('mywill', function (packet, cb) {
+    t.fail(packet)
+    cb()
+  })
+})
+
+test('deletes from persistence on DISCONNECT', function (t) {
+  t.plan(2)
+
+  const opts = {
+    clientId: 'abcde'
+  }
+  const broker = aedes()
+  t.teardown(broker.close.bind(broker))
+
+  const s = noError(willConnect(setup(broker), opts, function () {
+    s.inStream.end({
+      cmd: 'disconnect'
+    })
+  }), t)
+
+  s.broker.persistence.getWill({
+    id: opts.clientId
+  }, function (err, packet) {
+    t.error(err, 'no error')
+    t.notOk(packet)
+  })
+})
+
+test('does not store multiple will with same clientid', function (t) {
+  t.plan(4)
+
+  const opts = { clientId: 'abcde' }
+
+  const broker = aedes()
+
+  let s = noError(willConnect(setup(broker), opts, function () {
+    // gracefully close client so no will is sent
+    s.inStream.end({
+      cmd: 'disconnect'
+    })
+  }), t)
+
+  broker.on('clientDisconnect', function (client) {
+    // reconnect same client with will
+    s = willConnect(setup(broker), opts, function () {
+      // check that there are not 2 will messages for the same clientid
+      s.broker.persistence.delWill({ id: opts.clientId }, function (err, packet) {
+        t.error(err, 'no error')
+        t.equal(packet.clientId, opts.clientId, 'will packet found')
+        s.broker.persistence.delWill({ id: opts.clientId }, function (err, packet) {
+          t.error(err, 'no error')
+          t.equal(!!packet, false, 'no duplicated packets')
+          broker.close()
+        })
+      })
+    })
+  })
+})
+
+test('don\'t delivers a will if broker alive', function (t) {
+  const persistence = memory()
+  const will = {
+    topic: 'mywill',
+    payload: Buffer.from('last will'),
+    qos: 0,
+    retain: false
+  }
+
+  const oldBroker = 'broker1'
+
+  persistence.broker = {
+    id: oldBroker
+  }
+
+  persistence.putWill({
+    id: 'myClientId42'
+  }, will, function (err) {
+    t.error(err, 'no error')
+
+    const opts = {
+      persistence,
+      heartbeatInterval: 10
+    }
+
+    let count = 0
+
+    const broker = aedes(opts)
+    t.teardown(broker.close.bind(broker))
+
+    const streamWill = persistence.streamWill
+    persistence.streamWill = function () {
+      // don't pass broker.brokers to streamWill
+      return streamWill.call(persistence)
+    }
+
+    broker.mq.on('mywill', function (packet, cb) {
+      t.fail('Will received')
+      cb()
+    })
+
+    broker.mq.on('$SYS/+/heartbeat', function () {
+      t.pass('Heartbeat received')
+      broker.brokers[oldBroker] = Date.now()
+
+      if (++count === 5) {
+        t.end()
+      }
+    })
+  })
+})
+
+test('handle will publish error', function (t) {
+  t.plan(2)
+  const persistence = memory()
+  const will = {
+    topic: 'mywill',
+    payload: Buffer.from('last will'),
+    qos: 0,
+    retain: false
+  }
+
+  persistence.broker = {
+    id: 'broker1'
+  }
+
+  persistence.putWill({
+    id: 'myClientId42'
+  }, will, function (err) {
+    t.error(err, 'no error')
+
+    const opts = {
+      persistence,
+      heartbeatInterval: 10
+    }
+
+    persistence.delWill = function (client, cb) {
+      cb(new Error('Throws error'))
+    }
+
+    const broker = aedes(opts)
+    t.teardown(broker.close.bind(broker))
+
+    broker.once('error', function (err) {
+      t.equal('Throws error', err.message, 'throws error')
+    })
+  })
+})
+
+test('handle will publish error 2', function (t) {
+  t.plan(2)
+  const persistence = memory()
+  const will = {
+    topic: 'mywill',
+    payload: Buffer.from('last will'),
+    qos: 0,
+    retain: true
+  }
+
+  persistence.broker = {
+    id: 'broker1'
+  }
+
+  persistence.putWill({
+    id: 'myClientId42'
+  }, will, function (err) {
+    t.error(err, 'no error')
+
+    const opts = {
+      persistence,
+      heartbeatInterval: 10
+    }
+
+    persistence.storeRetained = function (packet, cb) {
+      cb(new Error('Throws error'))
+    }
+
+    const broker = aedes(opts)
+    t.teardown(broker.close.bind(broker))
+
+    broker.once('error', function (err) {
+      t.equal('Throws error', err.message, 'throws error')
+    })
+  })
+})
diff --git a/mqtt-backend/node_modules/aedes/types/.eslintrc.json b/mqtt-backend/node_modules/aedes/types/.eslintrc.json
new file mode 100644
index 0000000..f079385
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/types/.eslintrc.json
@@ -0,0 +1,47 @@
+{
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "standard"
+  ],
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
+  "env": { "node": true },
+  "parserOptions": {
+    "ecmaVersion": 6,
+    "sourceType": "module",
+    "project": "./types/tsconfig.json",
+    "createDefaultProgram": true
+  },
+  "rules": {
+    "linebreak-style": ["warn", "unix"],
+    "no-console": "off",
+    "semi": ["error", "never"],
+    "import/export": "off", // this errors on multiple exports (overload interfaces)
+    "@typescript-eslint/indent": ["error", 2]
+  },
+  "overrides": [
+    {
+      "files": ["*.d.ts", "*.test-d.ts"],
+      "rules": {
+        "no-dupe-class-members": "off",
+        "@typescript-eslint/no-explicit-any": "off",
+        "@typescript-eslint/triple-slash-reference": "off"
+      }
+    },
+    {
+      "files": ["*.test-d.ts"],
+      "rules": {
+        "no-unused-vars": "off",
+        "node/handle-callback-err": "off",
+        "@typescript-eslint/no-empty-function": "off",
+        "@typescript-eslint/explicit-function-return-type": "off",
+        "@typescript-eslint/no-unused-vars": "off",
+        "@typescript-eslint/no-non-null-assertion": "off"
+      },
+      "globals": {
+        "NodeJS": "readonly"
+      }
+    }
+  ]
+}
diff --git a/mqtt-backend/node_modules/aedes/types/client.d.ts b/mqtt-backend/node_modules/aedes/types/client.d.ts
new file mode 100644
index 0000000..2906213
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/types/client.d.ts
@@ -0,0 +1,44 @@
+import { IncomingMessage } from 'node:http'
+import {
+  PublishPacket,
+  SubscribePacket,
+  Subscription,
+  Subscriptions,
+  UnsubscribePacket
+} from './packet'
+import { Connection } from './instance'
+import { EventEmitter } from 'node:events'
+
+export interface Client extends EventEmitter {
+  id: Readonly<string>;
+  clean: Readonly<boolean>;
+  version: Readonly<number>;
+  conn: Connection;
+  req?: IncomingMessage;
+  connecting: Readonly<boolean>;
+  connected: Readonly<boolean>;
+  closed: Readonly<boolean>;
+
+  on(event: 'connected', listener: () => void): this;
+  on(event: 'error', listener: (error: Error) => void): this;
+
+  publish(message: PublishPacket, callback?: (error?: Error) => void): void;
+  subscribe(
+    subscriptions:
+    | Subscriptions
+    | Subscription
+    | Subscription[]
+    | SubscribePacket,
+    callback?: (error?: Error) => void
+  ): void;
+  unsubscribe(
+    topicObjects:
+    | Subscriptions
+    | Subscription
+    | Subscription[]
+    | UnsubscribePacket,
+    callback?: (error?: Error) => void
+  ): void;
+  close(callback?: () => void): void;
+  emptyOutgoingQueue(callback?: () => void): void;
+}
diff --git a/mqtt-backend/node_modules/aedes/types/instance.d.ts b/mqtt-backend/node_modules/aedes/types/instance.d.ts
new file mode 100644
index 0000000..22bd3ae
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/types/instance.d.ts
@@ -0,0 +1,160 @@
+import { Duplex } from 'node:stream'
+import { Socket } from 'node:net'
+import { IncomingMessage } from 'http'
+import { Client } from './client'
+import type {
+  AedesPublishPacket,
+  ConnectPacket,
+  ConnackPacket,
+  Subscription,
+  PingreqPacket,
+  PublishPacket,
+  PubrelPacket
+} from './packet'
+import { EventEmitter } from 'node:events'
+
+type LastHearthbeatTimestamp = Date;
+
+export interface Brokers {
+  [brokerId: string]: LastHearthbeatTimestamp;
+}
+
+export type Connection = Duplex | Socket;
+
+/* eslint no-unused-vars: 0 */
+export const enum AuthErrorCode {
+  UNNACCEPTABLE_PROTOCOL = 1,
+  IDENTIFIER_REJECTED = 2,
+  SERVER_UNAVAILABLE = 3,
+  BAD_USERNAME_OR_PASSWORD = 4,
+  NOT_AUTHORIZED = 5,
+}
+
+export type AuthenticateError = Error & { returnCode: AuthErrorCode };
+
+type PreConnectHandler = (
+  client: Client,
+  packet: ConnectPacket,
+  callback: (error: Error | null, success: boolean) => void
+) => void;
+
+type AuthenticateHandler = (
+  client: Client,
+  username: Readonly<string | undefined>,
+  password: Readonly<Buffer | undefined>,
+  done: (error: AuthenticateError | null, success: boolean | null) => void
+) => void;
+
+type AuthorizePublishHandler = (
+  client: Client | null,
+  packet: PublishPacket,
+  callback: (error?: Error | null) => void
+) => void;
+
+type AuthorizeSubscribeHandler = (
+  client: Client,
+  subscription: Subscription,
+  callback: (error: Error | null, subscription?: Subscription | null) => void
+) => void;
+
+type AuthorizeForwardHandler = (
+  client: Client,
+  packet: AedesPublishPacket
+) => AedesPublishPacket | null | void;
+
+type PublishedHandler = (
+  packet: AedesPublishPacket,
+  client: Client,
+  callback: (error?: Error | null) => void
+) => void;
+
+export interface AedesOptions {
+  mq?: any;
+  id?: string;
+  persistence?: any;
+  concurrency?: number;
+  heartbeatInterval?: number;
+  connectTimeout?: number;
+  keepaliveLimit?: number;
+  queueLimit?: number;
+  maxClientsIdLength?: number;
+  preConnect?: PreConnectHandler;
+  authenticate?: AuthenticateHandler;
+  authorizePublish?: AuthorizePublishHandler;
+  authorizeSubscribe?: AuthorizeSubscribeHandler;
+  authorizeForward?: AuthorizeForwardHandler;
+  published?: PublishedHandler;
+}
+
+export default class Aedes extends EventEmitter {
+  id: Readonly<string>
+  connectedClients: Readonly<number>
+  closed: Readonly<boolean>
+  brokers: Readonly<Brokers>
+
+  constructor(option?: AedesOptions);
+  handle: (stream: Connection, request?: IncomingMessage) => Client
+
+  on(event: 'closed', listener: () => void): this;
+  on(
+    event: 'client' | 'clientReady' | 'clientDisconnect' | 'keepaliveTimeout',
+    listener: (client: Client) => void
+  ): this;
+
+  on(
+    event: 'clientError' | 'connectionError',
+    listener: (client: Client, error: Error) => void
+  ): this;
+
+  on(
+    event: 'connackSent',
+    listener: (packet: ConnackPacket, client: Client) => void
+  ): this;
+
+  on(
+    event: 'ping',
+    listener: (packet: PingreqPacket, client: Client) => void
+  ): this;
+
+  on(
+    event: 'publish',
+    listener: (packet: AedesPublishPacket, client: Client | null) => void
+  ): this;
+
+  on(
+    event: 'ack',
+    listener: (packet: PublishPacket | PubrelPacket, client: Client) => void
+  ): this;
+
+  on(
+    event: 'subscribe',
+    listener: (subscriptions: Subscription[], client: Client) => void
+  ): this;
+
+  on(
+    event: 'unsubscribe',
+    listener: (unsubscriptions: string[], client: Client) => void
+  ): this;
+
+  publish(packet: PublishPacket, callback: (error?: Error) => void): void;
+  subscribe(
+    topic: string,
+    deliverfunc: (packet: AedesPublishPacket, callback: () => void) => void,
+    callback: () => void
+  ): void;
+
+  unsubscribe(
+    topic: string,
+    deliverfunc: (packet: AedesPublishPacket, callback: () => void) => void,
+    callback: () => void
+  ): void;
+
+  close(callback?: () => void): void;
+
+  preConnect: PreConnectHandler
+  authenticate: AuthenticateHandler
+  authorizePublish: AuthorizePublishHandler
+  authorizeSubscribe: AuthorizeSubscribeHandler
+  authorizeForward: AuthorizeForwardHandler
+  published: PublishedHandler
+}
diff --git a/mqtt-backend/node_modules/aedes/types/packet.d.ts b/mqtt-backend/node_modules/aedes/types/packet.d.ts
new file mode 100644
index 0000000..5ffdc15
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/types/packet.d.ts
@@ -0,0 +1,27 @@
+import { AedesPacket } from 'aedes-packet'
+import {
+  IConnackPacket,
+  IConnectPacket,
+  IPingreqPacket,
+  IPublishPacket,
+  IPubrelPacket,
+  ISubscribePacket,
+  ISubscription,
+  IUnsubscribePacket
+} from 'mqtt-packet'
+import { Client } from './client'
+
+export type SubscribePacket = ISubscribePacket & { cmd: 'subscribe' };
+export type UnsubscribePacket = IUnsubscribePacket & { cmd: 'unsubscribe' };
+export type Subscription = ISubscription & { clientId?: Client['id'] };
+export type Subscriptions = { subscriptions: Subscription[] };
+
+export type PublishPacket = IPublishPacket & { cmd: 'publish' };
+
+export type ConnectPacket = IConnectPacket & { cmd: 'connect' };
+export type ConnackPacket = IConnackPacket & { cmd: 'connack' };
+
+export type PubrelPacket = IPubrelPacket & { cmd: 'pubrel' };
+export type PingreqPacket = IPingreqPacket & { cmd: 'pingreq' };
+
+export type AedesPublishPacket = PublishPacket & AedesPacket;
diff --git a/mqtt-backend/node_modules/aedes/types/tsconfig.json b/mqtt-backend/node_modules/aedes/types/tsconfig.json
new file mode 100644
index 0000000..1381611
--- /dev/null
+++ b/mqtt-backend/node_modules/aedes/types/tsconfig.json
@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "es6",
+    "module": "commonjs",
+    "noEmit": true,
+    "strict": true,
+    "removeComments": true,
+    "typeRoots" : ["./", "../node_modules/@types/"]
+  },
+  "include": [
+    "../test/types/*.test-d.ts",
+    "./*.d.ts",
+    "../aedes.d.ts"
+  ]
+}
diff --git a/mqtt-backend/node_modules/base64-js/LICENSE b/mqtt-backend/node_modules/base64-js/LICENSE
new file mode 100644
index 0000000..6d52b8a
--- /dev/null
+++ b/mqtt-backend/node_modules/base64-js/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Jameson Little
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/base64-js/README.md b/mqtt-backend/node_modules/base64-js/README.md
new file mode 100644
index 0000000..b42a48f
--- /dev/null
+++ b/mqtt-backend/node_modules/base64-js/README.md
@@ -0,0 +1,34 @@
+base64-js
+=========
+
+`base64-js` does basic base64 encoding/decoding in pure JS.
+
+[![build status](https://secure.travis-ci.org/beatgammit/base64-js.png)](http://travis-ci.org/beatgammit/base64-js)
+
+Many browsers already have base64 encoding/decoding functionality, but it is for text data, not all-purpose binary data.
+
+Sometimes encoding/decoding binary data in the browser is useful, and that is what this module does.
+
+## install
+
+With [npm](https://npmjs.org) do:
+
+`npm install base64-js` and `var base64js = require('base64-js')`
+
+For use in web browsers do:
+
+`<script src="base64js.min.js"></script>`
+
+[Get supported base64-js with the Tidelift Subscription](https://tidelift.com/subscription/pkg/npm-base64-js?utm_source=npm-base64-js&utm_medium=referral&utm_campaign=readme)
+
+## methods
+
+`base64js` has three exposed functions, `byteLength`, `toByteArray` and `fromByteArray`, which both take a single argument.
+
+* `byteLength` - Takes a base64 string and returns length of byte array
+* `toByteArray` - Takes a base64 string and returns a byte array
+* `fromByteArray` - Takes a byte array and returns a base64 string
+
+## license
+
+MIT
diff --git a/mqtt-backend/node_modules/base64-js/base64js.min.js b/mqtt-backend/node_modules/base64-js/base64js.min.js
new file mode 100644
index 0000000..908ac83
--- /dev/null
+++ b/mqtt-backend/node_modules/base64-js/base64js.min.js
@@ -0,0 +1 @@
+(function(a){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=a();else if("function"==typeof define&&define.amd)define([],a);else{var b;b="undefined"==typeof window?"undefined"==typeof global?"undefined"==typeof self?this:self:global:window,b.base64js=a()}})(function(){return function(){function b(d,e,g){function a(j,i){if(!e[j]){if(!d[j]){var f="function"==typeof require&&require;if(!i&&f)return f(j,!0);if(h)return h(j,!0);var c=new Error("Cannot find module '"+j+"'");throw c.code="MODULE_NOT_FOUND",c}var k=e[j]={exports:{}};d[j][0].call(k.exports,function(b){var c=d[j][1][b];return a(c||b)},k,k.exports,b,d,e,g)}return e[j].exports}for(var h="function"==typeof require&&require,c=0;c<g.length;c++)a(g[c]);return a}return b}()({"/":[function(a,b,c){'use strict';function d(a){var b=a.length;if(0<b%4)throw new Error("Invalid string. Length must be a multiple of 4");var c=a.indexOf("=");-1===c&&(c=b);var d=c===b?0:4-c%4;return[c,d]}function e(a,b,c){return 3*(b+c)/4-c}function f(a){var b,c,f=d(a),g=f[0],h=f[1],j=new m(e(a,g,h)),k=0,n=0<h?g-4:g;for(c=0;c<n;c+=4)b=l[a.charCodeAt(c)]<<18|l[a.charCodeAt(c+1)]<<12|l[a.charCodeAt(c+2)]<<6|l[a.charCodeAt(c+3)],j[k++]=255&b>>16,j[k++]=255&b>>8,j[k++]=255&b;return 2===h&&(b=l[a.charCodeAt(c)]<<2|l[a.charCodeAt(c+1)]>>4,j[k++]=255&b),1===h&&(b=l[a.charCodeAt(c)]<<10|l[a.charCodeAt(c+1)]<<4|l[a.charCodeAt(c+2)]>>2,j[k++]=255&b>>8,j[k++]=255&b),j}function g(a){return k[63&a>>18]+k[63&a>>12]+k[63&a>>6]+k[63&a]}function h(a,b,c){for(var d,e=[],f=b;f<c;f+=3)d=(16711680&a[f]<<16)+(65280&a[f+1]<<8)+(255&a[f+2]),e.push(g(d));return e.join("")}function j(a){for(var b,c=a.length,d=c%3,e=[],f=16383,g=0,j=c-d;g<j;g+=f)e.push(h(a,g,g+f>j?j:g+f));return 1===d?(b=a[c-1],e.push(k[b>>2]+k[63&b<<4]+"==")):2===d&&(b=(a[c-2]<<8)+a[c-1],e.push(k[b>>10]+k[63&b>>4]+k[63&b<<2]+"=")),e.join("")}c.byteLength=function(a){var b=d(a),c=b[0],e=b[1];return 3*(c+e)/4-e},c.toByteArray=f,c.fromByteArray=j;for(var k=[],l=[],m="undefined"==typeof Uint8Array?Array:Uint8Array,n="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/",o=0,p=n.length;o<p;++o)k[o]=n[o],l[n.charCodeAt(o)]=o;l[45]=62,l[95]=63},{}]},{},[])("/")});
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/base64-js/index.d.ts b/mqtt-backend/node_modules/base64-js/index.d.ts
new file mode 100644
index 0000000..7d9fa1d
--- /dev/null
+++ b/mqtt-backend/node_modules/base64-js/index.d.ts
@@ -0,0 +1,3 @@
+export function byteLength(b64: string): number;
+export function toByteArray(b64: string): Uint8Array;
+export function fromByteArray(uint8: Uint8Array): string;
diff --git a/mqtt-backend/node_modules/base64-js/index.js b/mqtt-backend/node_modules/base64-js/index.js
new file mode 100644
index 0000000..0599f3e
--- /dev/null
+++ b/mqtt-backend/node_modules/base64-js/index.js
@@ -0,0 +1,150 @@
+'use strict'
+
+exports.byteLength = byteLength
+exports.toByteArray = toByteArray
+exports.fromByteArray = fromByteArray
+
+var lookup = []
+var revLookup = []
+var Arr = typeof Uint8Array !== 'undefined' ? Uint8Array : Array
+
+var code = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
+for (var i = 0, len = code.length; i < len; ++i) {
+  lookup[i] = code[i]
+  revLookup[code.charCodeAt(i)] = i
+}
+
+// Support decoding URL-safe base64 strings, as Node.js does.
+// See: https://en.wikipedia.org/wiki/Base64#URL_applications
+revLookup['-'.charCodeAt(0)] = 62
+revLookup['_'.charCodeAt(0)] = 63
+
+function getLens (b64) {
+  var len = b64.length
+
+  if (len % 4 > 0) {
+    throw new Error('Invalid string. Length must be a multiple of 4')
+  }
+
+  // Trim off extra bytes after placeholder bytes are found
+  // See: https://github.com/beatgammit/base64-js/issues/42
+  var validLen = b64.indexOf('=')
+  if (validLen === -1) validLen = len
+
+  var placeHoldersLen = validLen === len
+    ? 0
+    : 4 - (validLen % 4)
+
+  return [validLen, placeHoldersLen]
+}
+
+// base64 is 4/3 + up to two characters of the original data
+function byteLength (b64) {
+  var lens = getLens(b64)
+  var validLen = lens[0]
+  var placeHoldersLen = lens[1]
+  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
+}
+
+function _byteLength (b64, validLen, placeHoldersLen) {
+  return ((validLen + placeHoldersLen) * 3 / 4) - placeHoldersLen
+}
+
+function toByteArray (b64) {
+  var tmp
+  var lens = getLens(b64)
+  var validLen = lens[0]
+  var placeHoldersLen = lens[1]
+
+  var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen))
+
+  var curByte = 0
+
+  // if there are placeholders, only get up to the last complete 4 chars
+  var len = placeHoldersLen > 0
+    ? validLen - 4
+    : validLen
+
+  var i
+  for (i = 0; i < len; i += 4) {
+    tmp =
+      (revLookup[b64.charCodeAt(i)] << 18) |
+      (revLookup[b64.charCodeAt(i + 1)] << 12) |
+      (revLookup[b64.charCodeAt(i + 2)] << 6) |
+      revLookup[b64.charCodeAt(i + 3)]
+    arr[curByte++] = (tmp >> 16) & 0xFF
+    arr[curByte++] = (tmp >> 8) & 0xFF
+    arr[curByte++] = tmp & 0xFF
+  }
+
+  if (placeHoldersLen === 2) {
+    tmp =
+      (revLookup[b64.charCodeAt(i)] << 2) |
+      (revLookup[b64.charCodeAt(i + 1)] >> 4)
+    arr[curByte++] = tmp & 0xFF
+  }
+
+  if (placeHoldersLen === 1) {
+    tmp =
+      (revLookup[b64.charCodeAt(i)] << 10) |
+      (revLookup[b64.charCodeAt(i + 1)] << 4) |
+      (revLookup[b64.charCodeAt(i + 2)] >> 2)
+    arr[curByte++] = (tmp >> 8) & 0xFF
+    arr[curByte++] = tmp & 0xFF
+  }
+
+  return arr
+}
+
+function tripletToBase64 (num) {
+  return lookup[num >> 18 & 0x3F] +
+    lookup[num >> 12 & 0x3F] +
+    lookup[num >> 6 & 0x3F] +
+    lookup[num & 0x3F]
+}
+
+function encodeChunk (uint8, start, end) {
+  var tmp
+  var output = []
+  for (var i = start; i < end; i += 3) {
+    tmp =
+      ((uint8[i] << 16) & 0xFF0000) +
+      ((uint8[i + 1] << 8) & 0xFF00) +
+      (uint8[i + 2] & 0xFF)
+    output.push(tripletToBase64(tmp))
+  }
+  return output.join('')
+}
+
+function fromByteArray (uint8) {
+  var tmp
+  var len = uint8.length
+  var extraBytes = len % 3 // if we have 1 byte left, pad 2 bytes
+  var parts = []
+  var maxChunkLength = 16383 // must be multiple of 3
+
+  // go through the array every three bytes, we'll deal with trailing stuff later
+  for (var i = 0, len2 = len - extraBytes; i < len2; i += maxChunkLength) {
+    parts.push(encodeChunk(uint8, i, (i + maxChunkLength) > len2 ? len2 : (i + maxChunkLength)))
+  }
+
+  // pad the end with zeros, but make sure to not forget the extra bytes
+  if (extraBytes === 1) {
+    tmp = uint8[len - 1]
+    parts.push(
+      lookup[tmp >> 2] +
+      lookup[(tmp << 4) & 0x3F] +
+      '=='
+    )
+  } else if (extraBytes === 2) {
+    tmp = (uint8[len - 2] << 8) + uint8[len - 1]
+    parts.push(
+      lookup[tmp >> 10] +
+      lookup[(tmp >> 4) & 0x3F] +
+      lookup[(tmp << 2) & 0x3F] +
+      '='
+    )
+  }
+
+  return parts.join('')
+}
diff --git a/mqtt-backend/node_modules/base64-js/package.json b/mqtt-backend/node_modules/base64-js/package.json
new file mode 100644
index 0000000..c3972e3
--- /dev/null
+++ b/mqtt-backend/node_modules/base64-js/package.json
@@ -0,0 +1,47 @@
+{
+  "name": "base64-js",
+  "description": "Base64 encoding/decoding in pure JS",
+  "version": "1.5.1",
+  "author": "T. Jameson Little <t.jameson.little@gmail.com>",
+  "typings": "index.d.ts",
+  "bugs": {
+    "url": "https://github.com/beatgammit/base64-js/issues"
+  },
+  "devDependencies": {
+    "babel-minify": "^0.5.1",
+    "benchmark": "^2.1.4",
+    "browserify": "^16.3.0",
+    "standard": "*",
+    "tape": "4.x"
+  },
+  "homepage": "https://github.com/beatgammit/base64-js",
+  "keywords": [
+    "base64"
+  ],
+  "license": "MIT",
+  "main": "index.js",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/beatgammit/base64-js.git"
+  },
+  "scripts": {
+    "build": "browserify -s base64js -r ./ | minify > base64js.min.js",
+    "lint": "standard",
+    "test": "npm run lint && npm run unit",
+    "unit": "tape test/*.js"
+  },
+  "funding": [
+    {
+      "type": "github",
+      "url": "https://github.com/sponsors/feross"
+    },
+    {
+      "type": "patreon",
+      "url": "https://www.patreon.com/feross"
+    },
+    {
+      "type": "consulting",
+      "url": "https://feross.org/support"
+    }
+  ]
+}
diff --git a/mqtt-backend/node_modules/bl/.github/dependabot.yml b/mqtt-backend/node_modules/bl/.github/dependabot.yml
new file mode 100644
index 0000000..f468993
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/.github/dependabot.yml
@@ -0,0 +1,16 @@
+version: 2
+updates:
+  - package-ecosystem: 'github-actions'
+    directory: '/'
+    schedule:
+      interval: 'daily'
+    commit-message:
+      prefix: 'chore'
+      include: 'scope'
+  - package-ecosystem: 'npm'
+    directory: '/'
+    schedule:
+      interval: 'daily'
+    commit-message:
+      prefix: 'chore'
+      include: 'scope'
diff --git a/mqtt-backend/node_modules/bl/.github/workflows/test-and-release.yml b/mqtt-backend/node_modules/bl/.github/workflows/test-and-release.yml
new file mode 100644
index 0000000..ef048bb
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/.github/workflows/test-and-release.yml
@@ -0,0 +1,61 @@
+name: Test & Maybe Release
+on: [push, pull_request]
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        node: [18.x, 20.x, lts/*, current]
+        os: [macos-latest, ubuntu-latest, windows-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Checkout Repository
+        uses: actions/checkout@v6
+      - name: Use Node.js ${{ matrix.node }}
+        uses: actions/setup-node@v6.1.0
+        with:
+          node-version: ${{ matrix.node }}
+      - name: Install Dependencies
+        run: |
+          npm install --no-progress
+      - name: Run tests
+        run: |
+          npm config set script-shell bash
+          npm run test:ci
+  release:
+    name: Release
+    needs: test
+    runs-on: ubuntu-latest
+    if: github.event_name == 'push' && github.ref == 'refs/heads/master'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 0
+      - name: Setup Node.js
+        uses: actions/setup-node@v6.1.0
+        with:
+          node-version: lts/*
+      - name: Install dependencies
+        run: |
+          npm install --no-progress --no-package-lock --no-save
+      - name: Build
+        run: |
+          npm run build
+      - name: Install plugins
+        run: |
+          npm install \
+            @semantic-release/commit-analyzer \
+            conventional-changelog-conventionalcommits \
+            @semantic-release/release-notes-generator \
+            @semantic-release/npm \
+            @semantic-release/github \
+            @semantic-release/git \
+            @semantic-release/changelog \
+            --no-progress --no-package-lock --no-save
+      - name: Release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: npx semantic-release
+
diff --git a/mqtt-backend/node_modules/bl/BufferList.d.ts b/mqtt-backend/node_modules/bl/BufferList.d.ts
new file mode 100644
index 0000000..7487f12
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/BufferList.d.ts
@@ -0,0 +1,431 @@
+export type BufferListAcceptedTypes =
+  | Buffer
+  | BufferList
+  | Uint8Array
+  | BufferListAcceptedTypes[]
+  | string
+  | number;
+
+export interface BufferListConstructor {
+  new (initData?: BufferListAcceptedTypes): BufferList;
+  (initData?: BufferListAcceptedTypes): BufferList;
+
+  /**
+   * Determines if the passed object is a BufferList. It will return true
+   * if the passed object is an instance of BufferList or BufferListStream
+   * and false otherwise.
+   *
+   * N.B. this won't return true for BufferList or BufferListStream instances
+   * created by versions of this library before this static method was added.
+   *
+   * @param other
+   */
+
+  isBufferList(other: unknown): boolean;
+}
+
+interface BufferList {
+  prototype: Object
+
+  /**
+   * Get the length of the list in bytes. This is the sum of the lengths
+   * of all of the buffers contained in the list, minus any initial offset
+   * for a semi-consumed buffer at the beginning. Should accurately
+   * represent the total number of bytes that can be read from the list.
+   */
+
+  length: number;
+
+  /**
+   * Adds an additional buffer or BufferList to the internal list.
+   * this is returned so it can be chained.
+   *
+   * @param buffer
+   */
+
+  append(buffer: BufferListAcceptedTypes): this;
+
+  /**
+   * Adds an additional buffer or BufferList at the beginning of the internal list.
+   * this is returned so it can be chained.
+   *
+   * @param buffer
+   */
+  prepend(buffer: BufferListAcceptedTypes): this;
+
+  /**
+   * Will return the byte at the specified index.
+   * @param index
+   */
+
+  get(index: number): number;
+
+  /**
+   * Returns a new Buffer object containing the bytes within the
+   * range specified. Both start and end are optional and will
+   * default to the beginning and end of the list respectively.
+   *
+   * If the requested range spans a single internal buffer then a
+   * slice of that buffer will be returned which shares the original
+   * memory range of that Buffer. If the range spans multiple buffers
+   * then copy operations will likely occur to give you a uniform Buffer.
+   *
+   * @param start
+   * @param end
+   */
+
+  slice(start?: number, end?: number): Buffer;
+
+  /**
+   * Returns a new BufferList object containing the bytes within the
+   * range specified. Both start and end are optional and will default
+   * to the beginning and end of the list respectively.
+   *
+   * No copies will be performed. All buffers in the result share
+   * memory with the original list.
+   *
+   * @param start
+   * @param end
+   */
+
+  shallowSlice(start?: number, end?: number): this;
+
+  /**
+   * Copies the content of the list in the `dest` buffer, starting from
+   * `destStart` and containing the bytes within the range specified
+   * with `srcStart` to `srcEnd`.
+   *
+   * `destStart`, `start` and `end` are optional and will default to the
+   * beginning of the dest buffer, and the beginning and end of the
+   * list respectively.
+   *
+   * @param dest
+   * @param destStart
+   * @param srcStart
+   * @param srcEnd
+   */
+
+  copy(
+    dest: Buffer,
+    destStart?: number,
+    srcStart?: number,
+    srcEnd?: number
+  ): Buffer;
+
+  /**
+   * Performs a shallow-copy of the list. The internal Buffers remains the
+   * same, so if you change the underlying Buffers, the change will be
+   * reflected in both the original and the duplicate.
+   *
+   * This method is needed if you want to call consume() or pipe() and
+   * still keep the original list.
+   *
+   * @example
+   *
+   * ```js
+   * var bl = new BufferListStream();
+   * bl.append('hello');
+   * bl.append(' world');
+   * bl.append('\n');
+   * bl.duplicate().pipe(process.stdout, { end: false });
+   *
+   * console.log(bl.toString())
+   * ```
+   */
+
+  duplicate(): this;
+
+  /**
+   * Will shift bytes off the start of the list. The number of bytes
+   * consumed don't need to line up with the sizes of the internal
+   * Buffers—initial offsets will be calculated accordingly in order
+   * to give you a consistent view of the data.
+   *
+   * @param bytes
+   */
+
+  consume(bytes?: number): void;
+
+  /**
+   * Will return a string representation of the buffer. The optional
+   * `start` and `end` arguments are passed on to `slice()`, while
+   * the encoding is passed on to `toString()` of the resulting Buffer.
+   *
+   * See the [`Buffer#toString()`](http://nodejs.org/docs/latest/api/buffer.html#buffer_buf_tostring_encoding_start_end)
+   * documentation for more information.
+   *
+   * @param encoding
+   * @param start
+   * @param end
+   */
+
+  toString(encoding?: string, start?: number, end?: number): string;
+
+  /**
+   * Will return the byte at the specified index. indexOf() method
+   * returns the first index at which a given element can be found
+   * in the BufferList, or -1 if it is not present.
+   *
+   * @param value
+   * @param byteOffset
+   * @param encoding
+   */
+
+  indexOf(
+    value: string | number | Uint8Array | BufferList | Buffer,
+    byteOffset?: number,
+    encoding?: string
+  ): number;
+
+  /**
+   * Will return the internal list of buffers.
+   */
+  getBuffers(): Buffer[];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readDoubleBE: Buffer['readDoubleBE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readDoubleLE: Buffer['readDoubleLE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readFloatBE: Buffer['readFloatBE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readFloatLE: Buffer['readFloatLE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readBigInt64BE: Buffer['readBigInt64BE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readBigInt64LE: Buffer['readBigInt64LE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readBigUInt64BE: Buffer['readBigUInt64BE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readBigUInt64LE: Buffer['readBigUInt64LE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readInt32BE: Buffer['readInt32BE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readInt32LE: Buffer['readInt32LE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readUInt32BE: Buffer['readUInt32BE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readUInt32LE: Buffer['readUInt32LE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are implemented and will operate across internal Buffer boundaries transparently.
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html) documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readInt16BE: Buffer['readInt16BE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are
+   * implemented and will operate across internal Buffer boundaries transparently.
+   *
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html)
+   * documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readInt16LE: Buffer['readInt16LE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are
+   * implemented and will operate across internal Buffer boundaries transparently.
+   *
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html)
+   * documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readUInt16BE: Buffer['readUInt16BE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are
+   * implemented and will operate across internal Buffer boundaries transparently.
+   *
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html)
+   * documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readUInt16LE: Buffer['readUInt16LE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are
+   * implemented and will operate across internal Buffer boundaries transparently.
+   *
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html)
+   * documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readInt8: Buffer['readInt8'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are
+   * implemented and will operate across internal Buffer boundaries transparently.
+   *
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html)
+   * documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readUInt8: Buffer['readUInt8'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are
+   * implemented and will operate across internal Buffer boundaries transparently.
+   *
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html)
+   * documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readIntBE: Buffer['readIntBE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are
+   * implemented and will operate across internal Buffer boundaries transparently.
+   *
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html)
+   * documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readIntLE: Buffer['readIntLE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are
+   * implemented and will operate across internal Buffer boundaries transparently.
+   *
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html)
+   * documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readUIntBE: Buffer['readUIntBE'];
+
+  /**
+   * All of the standard byte-reading methods of the Buffer interface are
+   * implemented and will operate across internal Buffer boundaries transparently.
+   *
+   * See the [Buffer](http://nodejs.org/docs/latest/api/buffer.html)
+   * documentation for how these work.
+   *
+   * @param offset
+   */
+
+  readUIntLE: Buffer['readUIntLE'];
+}
+
+/**
+ * No arguments are required for the constructor, but you can initialise
+ * the list by passing in a single Buffer object or an array of Buffer
+ * objects.
+ *
+ * `new` is not strictly required, if you don't instantiate a new object,
+ * it will be done automatically for you so you can create a new instance
+ * simply with:
+ *
+ * ```js
+ * const { BufferList } = require('bl')
+ * const bl = BufferList()
+ *
+ * // equivalent to:
+ *
+ * const { BufferList } = require('bl')
+ * const bl = new BufferList()
+ * ```
+ */
+
+declare const BufferList: BufferListConstructor;
diff --git a/mqtt-backend/node_modules/bl/BufferList.js b/mqtt-backend/node_modules/bl/BufferList.js
new file mode 100644
index 0000000..536ec79
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/BufferList.js
@@ -0,0 +1,421 @@
+'use strict'
+
+const { Buffer } = require('buffer')
+const symbol = Symbol.for('BufferList')
+
+function BufferList (buf) {
+  if (!(this instanceof BufferList)) {
+    return new BufferList(buf)
+  }
+
+  BufferList._init.call(this, buf)
+}
+
+BufferList._init = function _init (buf) {
+  Object.defineProperty(this, symbol, { value: true })
+
+  this._bufs = []
+  this.length = 0
+
+  if (buf) {
+    this.append(buf)
+  }
+}
+
+BufferList.prototype._new = function _new (buf) {
+  return new BufferList(buf)
+}
+
+BufferList.prototype._offset = function _offset (offset) {
+  if (offset === 0) {
+    return [0, 0]
+  }
+
+  let tot = 0
+
+  for (let i = 0; i < this._bufs.length; i++) {
+    const _t = tot + this._bufs[i].length
+    if (offset < _t || i === this._bufs.length - 1) {
+      return [i, offset - tot]
+    }
+    tot = _t
+  }
+}
+
+BufferList.prototype._reverseOffset = function (blOffset) {
+  const bufferId = blOffset[0]
+  let offset = blOffset[1]
+
+  for (let i = 0; i < bufferId; i++) {
+    offset += this._bufs[i].length
+  }
+
+  return offset
+}
+
+BufferList.prototype.getBuffers = function getBuffers () {
+  return this._bufs
+}
+
+BufferList.prototype.get = function get (index) {
+  if (index > this.length || index < 0) {
+    return undefined
+  }
+
+  const offset = this._offset(index)
+
+  return this._bufs[offset[0]][offset[1]]
+}
+
+BufferList.prototype.slice = function slice (start, end) {
+  if (typeof start === 'number' && start < 0) {
+    start += this.length
+  }
+
+  if (typeof end === 'number' && end < 0) {
+    end += this.length
+  }
+
+  return this.copy(null, 0, start, end)
+}
+
+BufferList.prototype.copy = function copy (dst, dstStart, srcStart, srcEnd) {
+  if (typeof srcStart !== 'number' || srcStart < 0) {
+    srcStart = 0
+  }
+
+  if (typeof srcEnd !== 'number' || srcEnd > this.length) {
+    srcEnd = this.length
+  }
+
+  if (srcStart >= this.length) {
+    return dst || Buffer.alloc(0)
+  }
+
+  if (srcEnd <= 0) {
+    return dst || Buffer.alloc(0)
+  }
+
+  const copy = !!dst
+  const off = this._offset(srcStart)
+  const len = srcEnd - srcStart
+  let bytes = len
+  let bufoff = (copy && dstStart) || 0
+  let start = off[1]
+
+  // copy/slice everything
+  if (srcStart === 0 && srcEnd === this.length) {
+    if (!copy) {
+      // slice, but full concat if multiple buffers
+      return this._bufs.length === 1
+        ? this._bufs[0]
+        : Buffer.concat(this._bufs, this.length)
+    }
+
+    // copy, need to copy individual buffers
+    for (let i = 0; i < this._bufs.length; i++) {
+      this._bufs[i].copy(dst, bufoff)
+      bufoff += this._bufs[i].length
+    }
+
+    return dst
+  }
+
+  // easy, cheap case where it's a subset of one of the buffers
+  if (bytes <= this._bufs[off[0]].length - start) {
+    return copy
+      ? this._bufs[off[0]].copy(dst, dstStart, start, start + bytes)
+      : this._bufs[off[0]].slice(start, start + bytes)
+  }
+
+  if (!copy) {
+    // a slice, we need something to copy in to
+    dst = Buffer.allocUnsafe(len)
+  }
+
+  for (let i = off[0]; i < this._bufs.length; i++) {
+    const l = this._bufs[i].length - start
+
+    if (bytes > l) {
+      this._bufs[i].copy(dst, bufoff, start)
+      bufoff += l
+    } else {
+      this._bufs[i].copy(dst, bufoff, start, start + bytes)
+      bufoff += l
+      break
+    }
+
+    bytes -= l
+
+    if (start) {
+      start = 0
+    }
+  }
+
+  // safeguard so that we don't return uninitialized memory
+  if (dst.length > bufoff) return dst.slice(0, bufoff)
+
+  return dst
+}
+
+BufferList.prototype.shallowSlice = function shallowSlice (start, end) {
+  start = start || 0
+  end = typeof end !== 'number' ? this.length : end
+
+  if (start < 0) {
+    start += this.length
+  }
+
+  if (end < 0) {
+    end += this.length
+  }
+
+  if (start === end) {
+    return this._new()
+  }
+
+  const startOffset = this._offset(start)
+  const endOffset = this._offset(end)
+  const buffers = this._bufs.slice(startOffset[0], endOffset[0] + 1)
+
+  if (endOffset[1] === 0) {
+    buffers.pop()
+  } else {
+    buffers[buffers.length - 1] = buffers[buffers.length - 1].slice(0, endOffset[1])
+  }
+
+  if (startOffset[1] !== 0) {
+    buffers[0] = buffers[0].slice(startOffset[1])
+  }
+
+  return this._new(buffers)
+}
+
+BufferList.prototype.toString = function toString (encoding, start, end) {
+  return this.slice(start, end).toString(encoding)
+}
+
+BufferList.prototype.consume = function consume (bytes) {
+  // first, normalize the argument, in accordance with how Buffer does it
+  bytes = Math.trunc(bytes)
+  // do nothing if not a positive number
+  if (Number.isNaN(bytes) || bytes <= 0) return this
+
+  while (this._bufs.length) {
+    if (bytes >= this._bufs[0].length) {
+      bytes -= this._bufs[0].length
+      this.length -= this._bufs[0].length
+      this._bufs.shift()
+    } else {
+      this._bufs[0] = this._bufs[0].slice(bytes)
+      this.length -= bytes
+      break
+    }
+  }
+
+  return this
+}
+
+BufferList.prototype.duplicate = function duplicate () {
+  const copy = this._new()
+
+  for (let i = 0; i < this._bufs.length; i++) {
+    copy.append(this._bufs[i])
+  }
+
+  return copy
+}
+
+BufferList.prototype.append = function append (buf) {
+  return this._attach(buf, BufferList.prototype._appendBuffer)
+}
+
+BufferList.prototype.prepend = function prepend (buf) {
+  return this._attach(buf, BufferList.prototype._prependBuffer, true)
+}
+
+BufferList.prototype._attach = function _attach (buf, attacher, prepend) {
+  if (buf == null) {
+    return this
+  }
+
+  if (buf.buffer) {
+    // append/prepend a view of the underlying ArrayBuffer
+    attacher.call(this, Buffer.from(buf.buffer, buf.byteOffset, buf.byteLength))
+  } else if (Array.isArray(buf)) {
+    const [starting, modifier] = prepend ? [buf.length - 1, -1] : [0, 1]
+
+    for (let i = starting; i >= 0 && i < buf.length; i += modifier) {
+      this._attach(buf[i], attacher, prepend)
+    }
+  } else if (this._isBufferList(buf)) {
+    // unwrap argument into individual BufferLists
+    const [starting, modifier] = prepend ? [buf._bufs.length - 1, -1] : [0, 1]
+
+    for (let i = starting; i >= 0 && i < buf._bufs.length; i += modifier) {
+      this._attach(buf._bufs[i], attacher, prepend)
+    }
+  } else {
+    // coerce number arguments to strings, since Buffer(number) does
+    // uninitialized memory allocation
+    if (typeof buf === 'number') {
+      buf = buf.toString()
+    }
+
+    attacher.call(this, Buffer.from(buf))
+  }
+
+  return this
+}
+
+BufferList.prototype._appendBuffer = function appendBuffer (buf) {
+  this._bufs.push(buf)
+  this.length += buf.length
+}
+
+BufferList.prototype._prependBuffer = function prependBuffer (buf) {
+  this._bufs.unshift(buf)
+  this.length += buf.length
+}
+
+BufferList.prototype.indexOf = function (search, offset, encoding) {
+  if (encoding === undefined && typeof offset === 'string') {
+    encoding = offset
+    offset = undefined
+  }
+
+  if (typeof search === 'function' || Array.isArray(search)) {
+    throw new TypeError('The "value" argument must be one of type string, Buffer, BufferList, or Uint8Array.')
+  } else if (typeof search === 'number') {
+    search = Buffer.from([search])
+  } else if (typeof search === 'string') {
+    search = Buffer.from(search, encoding)
+  } else if (this._isBufferList(search)) {
+    search = search.slice()
+  } else if (Array.isArray(search.buffer)) {
+    search = Buffer.from(search.buffer, search.byteOffset, search.byteLength)
+  } else if (!Buffer.isBuffer(search)) {
+    search = Buffer.from(search)
+  }
+
+  offset = Number(offset || 0)
+
+  if (isNaN(offset)) {
+    offset = 0
+  }
+
+  if (offset < 0) {
+    offset = this.length + offset
+  }
+
+  if (offset < 0) {
+    offset = 0
+  }
+
+  if (search.length === 0) {
+    return offset > this.length ? this.length : offset
+  }
+
+  const blOffset = this._offset(offset)
+  let blIndex = blOffset[0] // index of which internal buffer we're working on
+  let buffOffset = blOffset[1] // offset of the internal buffer we're working on
+
+  // scan over each buffer
+  for (; blIndex < this._bufs.length; blIndex++) {
+    const buff = this._bufs[blIndex]
+
+    while (buffOffset < buff.length) {
+      const availableWindow = buff.length - buffOffset
+
+      if (availableWindow >= search.length) {
+        const nativeSearchResult = buff.indexOf(search, buffOffset)
+
+        if (nativeSearchResult !== -1) {
+          return this._reverseOffset([blIndex, nativeSearchResult])
+        }
+
+        buffOffset = buff.length - search.length + 1 // end of native search window
+      } else {
+        const revOffset = this._reverseOffset([blIndex, buffOffset])
+
+        if (this._match(revOffset, search)) {
+          return revOffset
+        }
+
+        buffOffset++
+      }
+    }
+
+    buffOffset = 0
+  }
+
+  return -1
+}
+
+BufferList.prototype._match = function (offset, search) {
+  if (this.length - offset < search.length) {
+    return false
+  }
+
+  for (let searchOffset = 0; searchOffset < search.length; searchOffset++) {
+    if (this.get(offset + searchOffset) !== search[searchOffset]) {
+      return false
+    }
+  }
+  return true
+}
+
+;(function () {
+  const methods = {
+    readDoubleBE: 8,
+    readDoubleLE: 8,
+    readFloatBE: 4,
+    readFloatLE: 4,
+    readBigInt64BE: 8,
+    readBigInt64LE: 8,
+    readBigUInt64BE: 8,
+    readBigUInt64LE: 8,
+    readInt32BE: 4,
+    readInt32LE: 4,
+    readUInt32BE: 4,
+    readUInt32LE: 4,
+    readInt16BE: 2,
+    readInt16LE: 2,
+    readUInt16BE: 2,
+    readUInt16LE: 2,
+    readInt8: 1,
+    readUInt8: 1,
+    readIntBE: null,
+    readIntLE: null,
+    readUIntBE: null,
+    readUIntLE: null
+  }
+
+  for (const m in methods) {
+    (function (m) {
+      if (methods[m] === null) {
+        BufferList.prototype[m] = function (offset, byteLength) {
+          return this.slice(offset, offset + byteLength)[m](0, byteLength)
+        }
+      } else {
+        BufferList.prototype[m] = function (offset = 0) {
+          return this.slice(offset, offset + methods[m])[m](0)
+        }
+      }
+    }(m))
+  }
+}())
+
+// Used internally by the class and also as an indicator of this object being
+// a `BufferList`. It's not possible to use `instanceof BufferList` in a browser
+// environment because there could be multiple different copies of the
+// BufferList class and some `BufferList`s might be `BufferList`s.
+BufferList.prototype._isBufferList = function _isBufferList (b) {
+  return b instanceof BufferList || BufferList.isBufferList(b)
+}
+
+BufferList.isBufferList = function isBufferList (b) {
+  return b != null && b[symbol]
+}
+
+module.exports = BufferList
diff --git a/mqtt-backend/node_modules/bl/CHANGELOG.md b/mqtt-backend/node_modules/bl/CHANGELOG.md
new file mode 100644
index 0000000..450d2ce
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/CHANGELOG.md
@@ -0,0 +1,221 @@
+## [6.1.6](https://github.com/rvagg/bl/compare/v6.1.5...v6.1.6) (2025-12-04)
+
+### Trivial Changes
+
+* **deps:** bump actions/setup-node from 6.0.0 to 6.1.0 ([#163](https://github.com/rvagg/bl/issues/163)) ([c51e63d](https://github.com/rvagg/bl/commit/c51e63d1ad01426135f79b09c5a355c4c4fd9df0))
+
+## [6.1.5](https://github.com/rvagg/bl/compare/v6.1.4...v6.1.5) (2025-11-24)
+
+### Trivial Changes
+
+* **deps:** bump actions/checkout from 5 to 6 ([#162](https://github.com/rvagg/bl/issues/162)) ([823100e](https://github.com/rvagg/bl/commit/823100e600b477b58e425b2fa714f66725d32b2a))
+
+## [6.1.4](https://github.com/rvagg/bl/compare/v6.1.3...v6.1.4) (2025-10-15)
+
+### Trivial Changes
+
+* **deps:** bump actions/setup-node from 5.0.0 to 6.0.0 ([#161](https://github.com/rvagg/bl/issues/161)) ([4f23fa9](https://github.com/rvagg/bl/commit/4f23fa9e1ef6053fe30d37a4f5b7c1a73156cfb9))
+
+## [6.1.3](https://github.com/rvagg/bl/compare/v6.1.2...v6.1.3) (2025-09-05)
+
+### Trivial Changes
+
+* **deps:** bump actions/setup-node from 4.2.0 to 5.0.0 ([#159](https://github.com/rvagg/bl/issues/159)) ([530e36f](https://github.com/rvagg/bl/commit/530e36f1b894dde916b5d453a7b276e4b7fb0223))
+
+## [6.1.2](https://github.com/rvagg/bl/compare/v6.1.1...v6.1.2) (2025-08-12)
+
+### Trivial Changes
+
+* **deps:** bump actions/checkout from 4 to 5 ([#158](https://github.com/rvagg/bl/issues/158)) ([28a3852](https://github.com/rvagg/bl/commit/28a385240073abe68517d56d18b442d55b16ebe9))
+
+## [6.1.1](https://github.com/rvagg/bl/compare/v6.1.0...v6.1.1) (2025-08-01)
+
+### Trivial Changes
+
+* **deps-dev:** bump typescript from 5.8.3 to 5.9.2 ([#157](https://github.com/rvagg/bl/issues/157)) ([70f4e16](https://github.com/rvagg/bl/commit/70f4e160c3146748ed71217b842bab27c04c70ca))
+
+## [6.1.0](https://github.com/rvagg/bl/compare/v6.0.20...v6.1.0) (2025-03-11)
+
+### Features
+
+* Added prepend and getBuffers methods. ([#154](https://github.com/rvagg/bl/issues/154)) ([e9eda95](https://github.com/rvagg/bl/commit/e9eda9549b1235af16afbe0c721f92e705109663))
+
+## [6.0.20](https://github.com/rvagg/bl/compare/v6.0.19...v6.0.20) (2025-03-03)
+
+### Trivial Changes
+
+* **deps-dev:** bump typescript from 5.7.3 to 5.8.2 ([#153](https://github.com/rvagg/bl/issues/153)) ([9291cf9](https://github.com/rvagg/bl/commit/9291cf9ec4b3cdef8c5779c73247844f48943c02))
+
+## [6.0.19](https://github.com/rvagg/bl/compare/v6.0.18...v6.0.19) (2025-01-28)
+
+### Trivial Changes
+
+* **deps:** bump actions/setup-node from 4.1.0 to 4.2.0 ([#151](https://github.com/rvagg/bl/issues/151)) ([2e72553](https://github.com/rvagg/bl/commit/2e7255395260941d199ffe644feecbe6ed2647e4))
+
+## [6.0.18](https://github.com/rvagg/bl/compare/v6.0.17...v6.0.18) (2024-12-30)
+
+### Trivial Changes
+
+* **deps-dev:** bump typescript from 5.6.3 to 5.7.2 ([d28178a](https://github.com/rvagg/bl/commit/d28178ae2e5c740de0e3d891beae77b26f801b0f))
+* **deps:** bump actions/setup-node from 4.0.4 to 4.1.0 ([#146](https://github.com/rvagg/bl/issues/146)) ([45c312b](https://github.com/rvagg/bl/commit/45c312b48b150d53336fecce69cb6895c8daaaeb))
+
+## [6.0.17](https://github.com/rvagg/bl/compare/v6.0.16...v6.0.17) (2024-12-30)
+
+### Tests
+
+* ignore TS errors from dependencies ([17e7a10](https://github.com/rvagg/bl/commit/17e7a10c82b07f3ef63a4235a842159d6c08a7d0))
+
+## [6.0.16](https://github.com/rvagg/bl/compare/v6.0.15...v6.0.16) (2024-09-25)
+
+### Trivial Changes
+
+* **deps:** bump actions/setup-node from 4.0.3 to 4.0.4 ([19d67ab](https://github.com/rvagg/bl/commit/19d67ab90e1e49a9b5ebc250969c2c5bde508db9))
+
+## [6.0.15](https://github.com/rvagg/bl/compare/v6.0.14...v6.0.15) (2024-09-10)
+
+### Trivial Changes
+
+* **deps-dev:** bump typescript from 5.5.4 to 5.6.2 ([edfc739](https://github.com/rvagg/bl/commit/edfc73964665530cfcc046319b446c6b6efeebff))
+
+## [6.0.14](https://github.com/rvagg/bl/compare/v6.0.13...v6.0.14) (2024-07-10)
+
+### Trivial Changes
+
+* **deps:** bump actions/setup-node from 4.0.2 to 4.0.3 ([09aa80d](https://github.com/rvagg/bl/commit/09aa80de083f045f0fd92414e97f2c241f8f15bf))
+
+## [6.0.13](https://github.com/rvagg/bl/compare/v6.0.12...v6.0.13) (2024-06-21)
+
+### Trivial Changes
+
+* **deps-dev:** bump typescript from 5.4.5 to 5.5.2 ([41eff82](https://github.com/rvagg/bl/commit/41eff826534912051ab60fe7c36baad7a3c09492))
+
+## [6.0.12](https://github.com/rvagg/bl/compare/v6.0.11...v6.0.12) (2024-03-07)
+
+
+### Trivial Changes
+
+* **deps-dev:** bump typescript from 5.3.3 to 5.4.2 ([18e99a2](https://github.com/rvagg/bl/commit/18e99a233d82c0ff5f3b00b04aab5a4ce6d37452))
+
+## [6.0.11](https://github.com/rvagg/bl/compare/v6.0.10...v6.0.11) (2024-02-08)
+
+
+### Trivial Changes
+
+* **deps:** bump actions/setup-node from 4.0.1 to 4.0.2 ([d8ac460](https://github.com/rvagg/bl/commit/d8ac460597a24b0e783da2acd6ab37eacbbb0af5))
+* update Node.js versions in CI ([863a5e0](https://github.com/rvagg/bl/commit/863a5e02f2c144c54be88ff962b0a902684c6527))
+
+## [6.0.10](https://github.com/rvagg/bl/compare/v6.0.9...v6.0.10) (2024-01-01)
+
+
+### Trivial Changes
+
+* **deps:** bump actions/setup-node from 4.0.0 to 4.0.1 ([a018907](https://github.com/rvagg/bl/commit/a0189073aee3e906b135a37595f8b4007e6dd3e7))
+
+## [6.0.9](https://github.com/rvagg/bl/compare/v6.0.8...v6.0.9) (2023-11-27)
+
+
+### Trivial Changes
+
+* **deps-dev:** bump typescript from 5.2.2 to 5.3.2 ([bb294bd](https://github.com/rvagg/bl/commit/bb294bd7baa5c5e1e062bd23b5d714692e04d414))
+
+## [6.0.8](https://github.com/rvagg/bl/compare/v6.0.7...v6.0.8) (2023-10-25)
+
+
+### Trivial Changes
+
+* **deps:** bump actions/checkout from 3 to 4 ([a9ad973](https://github.com/rvagg/bl/commit/a9ad973d1fe4e5f673fe3b9b72b4484136e1655d))
+* **deps:** bump actions/setup-node from 3.8.1 to 4.0.0 ([5921489](https://github.com/rvagg/bl/commit/59214897520fd6ba6d20a7cf370373275d4cfe1d))
+
+## [6.0.7](https://github.com/rvagg/bl/compare/v6.0.6...v6.0.7) (2023-08-25)
+
+
+### Trivial Changes
+
+* **deps-dev:** bump typescript from 5.1.6 to 5.2.2 ([7e539ad](https://github.com/rvagg/bl/commit/7e539ad2e9cf959f431e82eaafe137cf33cf22ef))
+
+## [6.0.6](https://github.com/rvagg/bl/compare/v6.0.5...v6.0.6) (2023-08-18)
+
+
+### Trivial Changes
+
+* **deps:** bump actions/setup-node from 3.8.0 to 3.8.1 ([39d3e17](https://github.com/rvagg/bl/commit/39d3e1729f0a7ddeac21e02b7983b0255ea212a2))
+
+## [6.0.5](https://github.com/rvagg/bl/compare/v6.0.4...v6.0.5) (2023-08-15)
+
+
+### Trivial Changes
+
+* **deps:** bump actions/setup-node from 3.7.0 to 3.8.0 ([183d80a](https://github.com/rvagg/bl/commit/183d80a616a32e5473ac47e46cecd19ca0dfcf9f))
+
+## [6.0.4](https://github.com/rvagg/bl/compare/v6.0.3...v6.0.4) (2023-08-07)
+
+
+### Trivial Changes
+
+* **deps-dev:** bump @types/readable-stream from 2.3.15 to 4.0.0 ([dd8cdb0](https://github.com/rvagg/bl/commit/dd8cdb0c64e1272c21d3bb251971afaaabbb0a1b))
+
+## [6.0.3](https://github.com/rvagg/bl/compare/v6.0.2...v6.0.3) (2023-07-07)
+
+
+### Trivial Changes
+
+* **deps:** bump actions/setup-node from 3.6.0 to 3.7.0 ([40ac0a5](https://github.com/rvagg/bl/commit/40ac0a52e3c1ef83ae95d9433aebe4135f79b761))
+
+## [6.0.2](https://github.com/rvagg/bl/compare/v6.0.1...v6.0.2) (2023-06-05)
+
+
+### Trivial Changes
+
+* **deps-dev:** bump typescript from 5.0.4 to 5.1.3 ([bea30ad](https://github.com/rvagg/bl/commit/bea30addef635d30f6e97769afacf5049615cdfe))
+
+## [6.0.1](https://github.com/rvagg/bl/compare/v6.0.0...v6.0.1) (2023-03-17)
+
+
+### Bug Fixes
+
+* release with Node.js 18 ([6965a1d](https://github.com/rvagg/bl/commit/6965a1dee6b2af5bca304c8c9b747b796a652ffd))
+
+
+### Trivial Changes
+
+* **deps-dev:** bump typescript from 4.9.5 to 5.0.2 ([0885658](https://github.com/rvagg/bl/commit/0885658f7c1696220ac846e5bbc19f8b6ae8d3c0))
+* **no-release:** bump actions/setup-node from 3.5.1 to 3.6.0 ([#120](https://github.com/rvagg/bl/issues/120)) ([60bee1b](https://github.com/rvagg/bl/commit/60bee1bd37a9f1a2a128f506f7da008c094db5c4))
+* **no-release:** bump typescript from 4.8.4 to 4.9.3 ([#118](https://github.com/rvagg/bl/issues/118)) ([8be6dd6](https://github.com/rvagg/bl/commit/8be6dd62f639fd6c2c2f7d5d6ac4db988adb1886))
+
+## [6.0.0](https://github.com/rvagg/bl/compare/v5.1.0...v6.0.0) (2022-10-19)
+
+
+### ⚠ BREAKING CHANGES
+
+* **deps:** bump readable-stream from 3.6.0 to 4.2.0
+* added bigint (Int64) support
+
+### Features
+
+* added bigint (Int64) support ([131ad32](https://github.com/rvagg/bl/commit/131ad3217b91090323513a8ea3ef179e8427cf47))
+
+
+### Trivial Changes
+
+* add TypeScript definitions for BigInt ([78c5ff4](https://github.com/rvagg/bl/commit/78c5ff489235a4e4233086c364133123c71acef4))
+* **deps-dev:** bump typescript from 4.7.4 to 4.8.4 ([dba13e1](https://github.com/rvagg/bl/commit/dba13e1cadc5857dde6a9425e975faf2abbb270f))
+* **deps:** bump readable-stream from 3.6.0 to 4.2.0 ([fa03eda](https://github.com/rvagg/bl/commit/fa03eda54b4412c0fdfc9053bd0b0bebaf80bfd9))
+* **docs:** BigInt in API docs ([c68af50](https://github.com/rvagg/bl/commit/c68af500a04b2c3a14132ae6946412d2e39402d0))
+
+## [5.1.0](https://github.com/rvagg/bl/compare/v5.0.0...v5.1.0) (2022-10-18)
+
+
+### Features
+
+* added integrated TypeScript typings ([#108](https://github.com/rvagg/bl/issues/108)) ([433ff89](https://github.com/rvagg/bl/commit/433ff8942f47fab8a5c9d13b2c00989ccf8d0710))
+
+
+### Bug Fixes
+
+* windows support in tests ([387dfaf](https://github.com/rvagg/bl/commit/387dfaf9b2bca7849f12785436ceb01e42adac2c))
+
+
+### Trivial Changes
+
+* GH Actions, Dependabot, auto-release, remove Travis ([997f058](https://github.com/rvagg/bl/commit/997f058357de8f2a7f66998e80a72b491835573f))
+* **no-release:** bump standard from 16.0.4 to 17.0.0 ([#112](https://github.com/rvagg/bl/issues/112)) ([078bfe3](https://github.com/rvagg/bl/commit/078bfe33390d125297b1c946e5989c4aa9228961))
diff --git a/mqtt-backend/node_modules/bl/LICENSE.md b/mqtt-backend/node_modules/bl/LICENSE.md
new file mode 100644
index 0000000..ecbe516
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/LICENSE.md
@@ -0,0 +1,13 @@
+The MIT License (MIT)
+=====================
+
+Copyright (c) 2013-2019 bl contributors
+----------------------------------
+
+*bl contributors listed at <https://github.com/rvagg/bl#contributors>*
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/bl/README.md b/mqtt-backend/node_modules/bl/README.md
new file mode 100644
index 0000000..55e85aa
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/README.md
@@ -0,0 +1,259 @@
+# bl *(BufferList)*
+
+![Build Status](https://img.shields.io/github/actions/workflow/status/rvagg/bl/test-and-release.yml?branch=master)
+
+**A Node.js Buffer list collector, reader and streamer thingy.**
+
+[![NPM](https://nodei.co/npm/bl.svg)](https://nodei.co/npm/bl/)
+
+**bl** is a storage object for collections of Node Buffers, exposing them with the main Buffer readable API. Also works as a duplex stream so you can collect buffers from a stream that emits them and emit buffers to a stream that consumes them!
+
+The original buffers are kept intact and copies are only done as necessary. Any reads that require the use of a single original buffer will return a slice of that buffer only (which references the same memory as the original buffer). Reads that span buffers perform concatenation as required and return the results transparently.
+
+```js
+const { BufferList } = require('bl')
+
+const bl = new BufferList()
+bl.append(Buffer.from('abcd'))
+bl.append(Buffer.from('efg'))
+bl.append('hi')                     // bl will also accept & convert Strings
+bl.append(Buffer.from('j'))
+bl.append(Buffer.from([ 0x3, 0x4 ]))
+
+console.log(bl.length) // 12
+
+console.log(bl.slice(0, 10).toString('ascii')) // 'abcdefghij'
+console.log(bl.slice(3, 10).toString('ascii')) // 'defghij'
+console.log(bl.slice(3, 6).toString('ascii'))  // 'def'
+console.log(bl.slice(3, 8).toString('ascii'))  // 'defgh'
+console.log(bl.slice(5, 10).toString('ascii')) // 'fghij'
+
+console.log(bl.indexOf('def')) // 3
+console.log(bl.indexOf('asdf')) // -1
+
+// or just use toString!
+console.log(bl.toString())               // 'abcdefghij\u0003\u0004'
+console.log(bl.toString('ascii', 3, 8))  // 'defgh'
+console.log(bl.toString('ascii', 5, 10)) // 'fghij'
+
+// other standard Buffer readables
+console.log(bl.readUInt16BE(10)) // 0x0304
+console.log(bl.readUInt16LE(10)) // 0x0403
+```
+
+Give it a callback in the constructor and use it just like **[concat-stream](https://github.com/maxogden/node-concat-stream)**:
+
+```js
+const { BufferListStream } = require('bl')
+const fs = require('fs')
+
+fs.createReadStream('README.md')
+  .pipe(BufferListStream((err, data) => { // note 'new' isn't strictly required
+    // `data` is a complete Buffer object containing the full data
+    console.log(data.toString())
+  }))
+```
+
+Note that when you use the *callback* method like this, the resulting `data` parameter is a concatenation of all `Buffer` objects in the list. If you want to avoid the overhead of this concatenation (in cases of extreme performance consciousness), then avoid the *callback* method and just listen to `'end'` instead, like a standard Stream.
+
+Or to fetch a URL using [hyperquest](https://github.com/substack/hyperquest) (should work with [request](http://github.com/mikeal/request) and even plain Node http too!):
+
+```js
+const hyperquest = require('hyperquest')
+const { BufferListStream } = require('bl')
+
+const url = 'https://raw.github.com/rvagg/bl/master/README.md'
+
+hyperquest(url).pipe(BufferListStream((err, data) => {
+  console.log(data.toString())
+}))
+```
+
+Or, use it as a readable stream to recompose a list of Buffers to an output source:
+
+```js
+const { BufferListStream } = require('bl')
+const fs = require('fs')
+
+var bl = new BufferListStream()
+bl.append(Buffer.from('abcd'))
+bl.append(Buffer.from('efg'))
+bl.append(Buffer.from('hi'))
+bl.append(Buffer.from('j'))
+
+bl.pipe(fs.createWriteStream('gibberish.txt'))
+```
+
+## API
+
+  * <a href="#ctor"><code><b>new BufferList([ buf ])</b></code></a>
+  * <a href="#isBufferList"><code><b>BufferList.isBufferList(obj)</b></code></a>
+  * <a href="#length"><code>bl.<b>length</b></code></a>
+  * <a href="#append"><code>bl.<b>append(buffer)</b></code></a>
+  * <a href="#prepend"><code>bl.<b>append(buffer)</b></code></a>
+  * <a href="#get"><code>bl.<b>get(index)</b></code></a>
+  * <a href="#indexOf"><code>bl.<b>indexOf(value[, byteOffset][, encoding])</b></code></a>
+  * <a href="#slice"><code>bl.<b>slice([ start[, end ] ])</b></code></a>
+  * <a href="#shallowSlice"><code>bl.<b>shallowSlice([ start[, end ] ])</b></code></a>
+  * <a href="#copy"><code>bl.<b>copy(dest, [ destStart, [ srcStart [, srcEnd ] ] ])</b></code></a>
+  * <a href="#duplicate"><code>bl.<b>duplicate()</b></code></a>
+  * <a href="#consume"><code>bl.<b>consume(bytes)</b></code></a>
+  * <a href="#toString"><code>bl.<b>toString([encoding, [ start, [ end ]]])</b></code></a>
+  * <a href="#readXX"><code>bl.<b>readDoubleBE()</b></code>, <code>bl.<b>readDoubleLE()</b></code>, <code>bl.<b>readFloatBE()</b></code>, <code>bl.<b>readFloatLE()</b></code>, <code>bl.<b>readBigInt64BE()</b></code>, <code>bl.<b>readBigInt64LE()</b></code>, <code>bl.<b>readBigUInt64BE()</b></code>, <code>bl.<b>readBigUInt64LE()</b></code>, <code>bl.<b>readInt32BE()</b></code>, <code>bl.<b>readInt32LE()</b></code>, <code>bl.<b>readUInt32BE()</b></code>, <code>bl.<b>readUInt32LE()</b></code>, <code>bl.<b>readInt16BE()</b></code>, <code>bl.<b>readInt16LE()</b></code>, <code>bl.<b>readUInt16BE()</b></code>, <code>bl.<b>readUInt16LE()</b></code>, <code>bl.<b>readInt8()</b></code>, <code>bl.<b>readUInt8()</b></code></a>
+  * <a href="#ctorStream"><code><b>new BufferListStream([ callback ])</b></code></a>
+  * <a href="#getBuffers"><code>bl.<b>getBuffers()</b></code></a>
+  
+--------------------------------------------------------
+<a name="ctor"></a>
+### new BufferList([ Buffer | Buffer array | BufferList | BufferList array | String ])
+No arguments are _required_ for the constructor, but you can initialise the list by passing in a single `Buffer` object or an array of `Buffer` objects.
+
+`new` is not strictly required, if you don't instantiate a new object, it will be done automatically for you so you can create a new instance simply with:
+
+```js
+const { BufferList } = require('bl')
+const bl = BufferList()
+
+// equivalent to:
+
+const { BufferList } = require('bl')
+const bl = new BufferList()
+```
+
+--------------------------------------------------------
+<a name="isBufferList"></a>
+### BufferList.isBufferList(obj)
+Determines if the passed object is a `BufferList`. It will return `true` if the passed object is an instance of `BufferList` **or** `BufferListStream` and `false` otherwise.
+
+N.B. this won't return `true` for `BufferList` or `BufferListStream` instances created by versions of this library before this static method was added.
+
+--------------------------------------------------------
+<a name="length"></a>
+### bl.length
+Get the length of the list in bytes. This is the sum of the lengths of all of the buffers contained in the list, minus any initial offset for a semi-consumed buffer at the beginning. Should accurately represent the total number of bytes that can be read from the list.
+
+--------------------------------------------------------
+<a name="append"></a>
+### bl.append(Buffer | Buffer array | BufferList | BufferList array | String)
+`append(buffer)` adds an additional buffer or BufferList to the internal list. `this` is returned so it can be chained.
+
+--------------------------------------------------------
+<a name="prepend"></a>
+### bl.prepend(Buffer | Buffer array | BufferList | BufferList array | String)
+`prepend(buffer)` adds an additional buffer or BufferList at the beginning of the internal list. `this` is returned so it can be chained.
+
+--------------------------------------------------------
+<a name="get"></a>
+### bl.get(index)
+`get()` will return the byte at the specified index.
+
+--------------------------------------------------------
+<a name="indexOf"></a>
+### bl.indexOf(value[, byteOffset][, encoding])
+`get()` will return the byte at the specified index.
+`indexOf()` method returns the first index at which a given element can be found in the BufferList, or -1 if it is not present.
+
+--------------------------------------------------------
+<a name="slice"></a>
+### bl.slice([ start, [ end ] ])
+`slice()` returns a new `Buffer` object containing the bytes within the range specified. Both `start` and `end` are optional and will default to the beginning and end of the list respectively.
+
+If the requested range spans a single internal buffer then a slice of that buffer will be returned which shares the original memory range of that Buffer. If the range spans multiple buffers then copy operations will likely occur to give you a uniform Buffer.
+
+--------------------------------------------------------
+<a name="shallowSlice"></a>
+### bl.shallowSlice([ start, [ end ] ])
+`shallowSlice()` returns a new `BufferList` object containing the bytes within the range specified. Both `start` and `end` are optional and will default to the beginning and end of the list respectively.
+
+No copies will be performed. All buffers in the result share memory with the original list.
+
+--------------------------------------------------------
+<a name="copy"></a>
+### bl.copy(dest, [ destStart, [ srcStart [, srcEnd ] ] ])
+`copy()` copies the content of the list in the `dest` buffer, starting from `destStart` and containing the bytes within the range specified with `srcStart` to `srcEnd`. `destStart`, `start` and `end` are optional and will default to the beginning of the `dest` buffer, and the beginning and end of the list respectively.
+
+--------------------------------------------------------
+<a name="duplicate"></a>
+### bl.duplicate()
+`duplicate()` performs a **shallow-copy** of the list. The internal Buffers remains the same, so if you change the underlying Buffers, the change will be reflected in both the original and the duplicate. This method is needed if you want to call `consume()` or `pipe()` and still keep the original list.Example:
+
+```js
+var bl = new BufferListStream()
+
+bl.append('hello')
+bl.append(' world')
+bl.append('\n')
+
+bl.duplicate().pipe(process.stdout, { end: false })
+
+console.log(bl.toString())
+```
+
+--------------------------------------------------------
+<a name="consume"></a>
+### bl.consume(bytes)
+`consume()` will shift bytes *off the start of the list*. The number of bytes consumed don't need to line up with the sizes of the internal Buffers&mdash;initial offsets will be calculated accordingly in order to give you a consistent view of the data.
+
+--------------------------------------------------------
+<a name="toString"></a>
+### bl.toString([encoding, [ start, [ end ]]])
+`toString()` will return a string representation of the buffer. The optional `start` and `end` arguments are passed on to `slice()`, while the `encoding` is passed on to `toString()` of the resulting Buffer. See the [Buffer#toString()](http://nodejs.org/docs/latest/api/buffer.html#buffer_buf_tostring_encoding_start_end) documentation for more information.
+
+--------------------------------------------------------
+<a name="readXX"></a>
+### bl.readDoubleBE(), bl.readDoubleLE(), bl.readFloatBE(), bl.readFloatLE(), bl.readBigInt64BE(), bl.readBigInt64LE(), bl.readBigUInt64BE(), bl.readBigUInt64LE(), bl.readInt32BE(), bl.readInt32LE(), bl.readUInt32BE(), bl.readUInt32LE(), bl.readInt16BE(), bl.readInt16LE(), bl.readUInt16BE(), bl.readUInt16LE(), bl.readInt8(), bl.readUInt8()
+
+All of the standard byte-reading methods of the `Buffer` interface are implemented and will operate across internal Buffer boundaries transparently.
+
+See the <b><code>[Buffer](http://nodejs.org/docs/latest/api/buffer.html)</code></b> documentation for how these work.
+
+--------------------------------------------------------
+<a name="ctorStream"></a>
+### new BufferListStream([ callback | Buffer | Buffer array | BufferList | BufferList array | String ])
+**BufferListStream** is a Node **[Duplex Stream](http://nodejs.org/docs/latest/api/stream.html#stream_class_stream_duplex)**, so it can be read from and written to like a standard Node stream. You can also `pipe()` to and from a **BufferListStream** instance.
+
+The constructor takes an optional callback, if supplied, the callback will be called with an error argument followed by a reference to the **bl** instance, when `bl.end()` is called (i.e. from a piped stream). This is a convenient method of collecting the entire contents of a stream, particularly when the stream is *chunky*, such as a network stream.
+
+Normally, no arguments are required for the constructor, but you can initialise the list by passing in a single `Buffer` object or an array of `Buffer` object.
+
+`new` is not strictly required, if you don't instantiate a new object, it will be done automatically for you so you can create a new instance simply with:
+
+```js
+const { BufferListStream } = require('bl')
+const bl = BufferListStream()
+
+// equivalent to:
+
+const { BufferListStream } = require('bl')
+const bl = new BufferListStream()
+```
+
+N.B. For backwards compatibility reasons, `BufferListStream` is the **default** export when you `require('bl')`:
+
+```js
+const { BufferListStream } = require('bl')
+// equivalent to:
+const BufferListStream = require('bl')
+```
+
+--------------------------------------------------------
+<a name="getBuffers"></a>
+### bl.getBuffers()
+
+`getBuffers()` returns the internal list of buffers.
+
+
+## Contributors
+
+**bl** is brought to you by the following hackers:
+
+ * [Rod Vagg](https://github.com/rvagg)
+ * [Matteo Collina](https://github.com/mcollina)
+ * [Jarett Cruger](https://github.com/jcrugzz)
+
+<a name="license"></a>
+## License &amp; copyright
+
+Copyright (c) 2013-2019 bl contributors (listed above).
+
+bl is licensed under the MIT license. All rights not explicitly granted in the MIT license are reserved. See the included LICENSE.md file for more details.
diff --git a/mqtt-backend/node_modules/bl/bl.js b/mqtt-backend/node_modules/bl/bl.js
new file mode 100644
index 0000000..40228f8
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/bl.js
@@ -0,0 +1,84 @@
+'use strict'
+
+const DuplexStream = require('readable-stream').Duplex
+const inherits = require('inherits')
+const BufferList = require('./BufferList')
+
+function BufferListStream (callback) {
+  if (!(this instanceof BufferListStream)) {
+    return new BufferListStream(callback)
+  }
+
+  if (typeof callback === 'function') {
+    this._callback = callback
+
+    const piper = function piper (err) {
+      if (this._callback) {
+        this._callback(err)
+        this._callback = null
+      }
+    }.bind(this)
+
+    this.on('pipe', function onPipe (src) {
+      src.on('error', piper)
+    })
+    this.on('unpipe', function onUnpipe (src) {
+      src.removeListener('error', piper)
+    })
+
+    callback = null
+  }
+
+  BufferList._init.call(this, callback)
+  DuplexStream.call(this)
+}
+
+inherits(BufferListStream, DuplexStream)
+Object.assign(BufferListStream.prototype, BufferList.prototype)
+
+BufferListStream.prototype._new = function _new (callback) {
+  return new BufferListStream(callback)
+}
+
+BufferListStream.prototype._write = function _write (buf, encoding, callback) {
+  this._appendBuffer(buf)
+
+  if (typeof callback === 'function') {
+    callback()
+  }
+}
+
+BufferListStream.prototype._read = function _read (size) {
+  if (!this.length) {
+    return this.push(null)
+  }
+
+  size = Math.min(size, this.length)
+  this.push(this.slice(0, size))
+  this.consume(size)
+}
+
+BufferListStream.prototype.end = function end (chunk) {
+  DuplexStream.prototype.end.call(this, chunk)
+
+  if (this._callback) {
+    this._callback(null, this.slice())
+    this._callback = null
+  }
+}
+
+BufferListStream.prototype._destroy = function _destroy (err, cb) {
+  this._bufs.length = 0
+  this.length = 0
+  cb(err)
+}
+
+BufferListStream.prototype._isBufferList = function _isBufferList (b) {
+  return b instanceof BufferListStream || b instanceof BufferList || BufferListStream.isBufferList(b)
+}
+
+BufferListStream.isBufferList = BufferList.isBufferList
+
+module.exports = BufferListStream
+module.exports.BufferListStream = BufferListStream
+module.exports.BufferList = BufferList
diff --git a/mqtt-backend/node_modules/bl/index.d.ts b/mqtt-backend/node_modules/bl/index.d.ts
new file mode 100644
index 0000000..07a8ee3
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/index.d.ts
@@ -0,0 +1,88 @@
+import { Duplex } from "readable-stream";
+import {
+  BufferList as BL,
+  BufferListConstructor,
+  BufferListAcceptedTypes,
+} from "./BufferList";
+
+type BufferListStreamInit =
+  | ((err: Error, buffer: Buffer) => void)
+  | BufferListAcceptedTypes;
+
+interface BufferListStreamConstructor {
+  new (initData?: BufferListStreamInit): BufferListStream;
+  (callback?: BufferListStreamInit): BufferListStream;
+
+  /**
+   * Determines if the passed object is a BufferList. It will return true
+   * if the passed object is an instance of BufferList or BufferListStream
+   * and false otherwise.
+   *
+   * N.B. this won't return true for BufferList or BufferListStream instances
+   * created by versions of this library before this static method was added.
+   *
+   * @param other
+   */
+
+  isBufferList(other: unknown): boolean;
+
+  /**
+   * Rexporting BufferList and BufferListStream to fix
+   * issue with require/commonjs import and "export = " below.
+   */
+
+  BufferList: BufferListConstructor;
+  BufferListStream: BufferListStreamConstructor;
+}
+
+interface BufferListStream extends Duplex, BL {
+  prototype: BufferListStream & BL;
+}
+
+/**
+ * BufferListStream is a Node Duplex Stream, so it can be read from
+ * and written to like a standard Node stream. You can also pipe()
+ * to and from a BufferListStream instance.
+ *
+ * The constructor takes an optional callback, if supplied, the
+ * callback will be called with an error argument followed by a
+ * reference to the bl instance, when bl.end() is called
+ * (i.e. from a piped stream).
+ *
+ * This is a convenient method of collecting the entire contents of
+ * a stream, particularly when the stream is chunky, such as a network
+ * stream.
+ *
+ * Normally, no arguments are required for the constructor, but you can
+ * initialise the list by passing in a single Buffer object or an array
+ * of Buffer object.
+ *
+ * `new` is not strictly required, if you don't instantiate a new object,
+ * it will be done automatically for you so you can create a new instance
+ * simply with:
+ *
+ * ```js
+ * const { BufferListStream } = require('bl');
+ * const bl = BufferListStream();
+ *
+ * // equivalent to:
+ *
+ * const { BufferListStream } = require('bl');
+ * const bl = new BufferListStream();
+ * ```
+ *
+ * N.B. For backwards compatibility reasons, BufferListStream is the default
+ * export when you `require('bl')`:
+ *
+ * ```js
+ * const { BufferListStream } = require('bl')
+ *
+ * // equivalent to:
+ *
+ * const BufferListStream = require('bl')
+ * ```
+ */
+
+declare const BufferListStream: BufferListStreamConstructor;
+
+export = BufferListStream;
diff --git a/mqtt-backend/node_modules/bl/node_modules/buffer/AUTHORS.md b/mqtt-backend/node_modules/bl/node_modules/buffer/AUTHORS.md
new file mode 100644
index 0000000..468aa19
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/node_modules/buffer/AUTHORS.md
@@ -0,0 +1,73 @@
+# Authors
+
+#### Ordered by first contribution.
+
+- Romain Beauxis (toots@rastageeks.org)
+- Tobias Koppers (tobias.koppers@googlemail.com)
+- Janus (ysangkok@gmail.com)
+- Rainer Dreyer (rdrey1@gmail.com)
+- Tõnis Tiigi (tonistiigi@gmail.com)
+- James Halliday (mail@substack.net)
+- Michael Williamson (mike@zwobble.org)
+- elliottcable (github@elliottcable.name)
+- rafael (rvalle@livelens.net)
+- Andrew Kelley (superjoe30@gmail.com)
+- Andreas Madsen (amwebdk@gmail.com)
+- Mike Brevoort (mike.brevoort@pearson.com)
+- Brian White (mscdex@mscdex.net)
+- Feross Aboukhadijeh (feross@feross.org)
+- Ruben Verborgh (ruben@verborgh.org)
+- eliang (eliang.cs@gmail.com)
+- Jesse Tane (jesse.tane@gmail.com)
+- Alfonso Boza (alfonso@cloud.com)
+- Mathias Buus (mathiasbuus@gmail.com)
+- Devon Govett (devongovett@gmail.com)
+- Daniel Cousens (github@dcousens.com)
+- Joseph Dykstra (josephdykstra@gmail.com)
+- Parsha Pourkhomami (parshap+git@gmail.com)
+- Damjan Košir (damjan.kosir@gmail.com)
+- daverayment (dave.rayment@gmail.com)
+- kawanet (u-suke@kawa.net)
+- Linus Unnebäck (linus@folkdatorn.se)
+- Nolan Lawson (nolan.lawson@gmail.com)
+- Calvin Metcalf (calvin.metcalf@gmail.com)
+- Koki Takahashi (hakatasiloving@gmail.com)
+- Guy Bedford (guybedford@gmail.com)
+- Jan Schär (jscissr@gmail.com)
+- RaulTsc (tomescu.raul@gmail.com)
+- Matthieu Monsch (monsch@alum.mit.edu)
+- Dan Ehrenberg (littledan@chromium.org)
+- Kirill Fomichev (fanatid@ya.ru)
+- Yusuke Kawasaki (u-suke@kawa.net)
+- DC (dcposch@dcpos.ch)
+- John-David Dalton (john.david.dalton@gmail.com)
+- adventure-yunfei (adventure030@gmail.com)
+- Emil Bay (github@tixz.dk)
+- Sam Sudar (sudar.sam@gmail.com)
+- Volker Mische (volker.mische@gmail.com)
+- David Walton (support@geekstocks.com)
+- Сковорода Никита Андреевич (chalkerx@gmail.com)
+- greenkeeper[bot] (greenkeeper[bot]@users.noreply.github.com)
+- ukstv (sergey.ukustov@machinomy.com)
+- Renée Kooi (renee@kooi.me)
+- ranbochen (ranbochen@qq.com)
+- Vladimir Borovik (bobahbdb@gmail.com)
+- greenkeeper[bot] (23040076+greenkeeper[bot]@users.noreply.github.com)
+- kumavis (aaron@kumavis.me)
+- Sergey Ukustov (sergey.ukustov@machinomy.com)
+- Fei Liu (liu.feiwood@gmail.com)
+- Blaine Bublitz (blaine.bublitz@gmail.com)
+- clement (clement@seald.io)
+- Koushik Dutta (koushd@gmail.com)
+- Jordan Harband (ljharb@gmail.com)
+- Niklas Mischkulnig (mischnic@users.noreply.github.com)
+- Nikolai Vavilov (vvnicholas@gmail.com)
+- Fedor Nezhivoi (gyzerok@users.noreply.github.com)
+- shuse2 (shus.toda@gmail.com)
+- Peter Newman (peternewman@users.noreply.github.com)
+- mathmakgakpak (44949126+mathmakgakpak@users.noreply.github.com)
+- jkkang (jkkang@smartauth.kr)
+- Deklan Webster (deklanw@gmail.com)
+- Martin Heidegger (martin.heidegger@gmail.com)
+
+#### Generated by bin/update-authors.sh.
diff --git a/mqtt-backend/node_modules/bl/node_modules/buffer/LICENSE b/mqtt-backend/node_modules/bl/node_modules/buffer/LICENSE
new file mode 100644
index 0000000..d6bf75d
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/node_modules/buffer/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) Feross Aboukhadijeh, and other contributors.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/bl/node_modules/buffer/README.md b/mqtt-backend/node_modules/bl/node_modules/buffer/README.md
new file mode 100644
index 0000000..451e235
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/node_modules/buffer/README.md
@@ -0,0 +1,410 @@
+# buffer [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url] [![javascript style guide][standard-image]][standard-url]
+
+[travis-image]: https://img.shields.io/travis/feross/buffer/master.svg
+[travis-url]: https://travis-ci.org/feross/buffer
+[npm-image]: https://img.shields.io/npm/v/buffer.svg
+[npm-url]: https://npmjs.org/package/buffer
+[downloads-image]: https://img.shields.io/npm/dm/buffer.svg
+[downloads-url]: https://npmjs.org/package/buffer
+[standard-image]: https://img.shields.io/badge/code_style-standard-brightgreen.svg
+[standard-url]: https://standardjs.com
+
+#### The buffer module from [node.js](https://nodejs.org/), for the browser.
+
+[![saucelabs][saucelabs-image]][saucelabs-url]
+
+[saucelabs-image]: https://saucelabs.com/browser-matrix/buffer.svg
+[saucelabs-url]: https://saucelabs.com/u/buffer
+
+With [browserify](http://browserify.org), simply `require('buffer')` or use the `Buffer` global and you will get this module.
+
+The goal is to provide an API that is 100% identical to
+[node's Buffer API](https://nodejs.org/api/buffer.html). Read the
+[official docs](https://nodejs.org/api/buffer.html) for the full list of properties,
+instance methods, and class methods that are supported.
+
+## features
+
+- Manipulate binary data like a boss, in all browsers!
+- Super fast. Backed by Typed Arrays (`Uint8Array`/`ArrayBuffer`, not `Object`)
+- Extremely small bundle size (**6.75KB minified + gzipped**, 51.9KB with comments)
+- Excellent browser support (Chrome, Firefox, Edge, Safari 11+, iOS 11+, Android, etc.)
+- Preserves Node API exactly, with one minor difference (see below)
+- Square-bracket `buf[4]` notation works!
+- Does not modify any browser prototypes or put anything on `window`
+- Comprehensive test suite (including all buffer tests from node.js core)
+
+## install
+
+To use this module directly (without browserify), install it:
+
+```bash
+npm install buffer
+```
+
+This module was previously called **native-buffer-browserify**, but please use **buffer**
+from now on.
+
+If you do not use a bundler, you can use the [standalone script](https://bundle.run/buffer).
+
+## usage
+
+The module's API is identical to node's `Buffer` API. Read the
+[official docs](https://nodejs.org/api/buffer.html) for the full list of properties,
+instance methods, and class methods that are supported.
+
+As mentioned above, `require('buffer')` or use the `Buffer` global with
+[browserify](http://browserify.org) and this module will automatically be included
+in your bundle. Almost any npm module will work in the browser, even if it assumes that
+the node `Buffer` API will be available.
+
+To depend on this module explicitly (without browserify), require it like this:
+
+```js
+var Buffer = require('buffer/').Buffer  // note: the trailing slash is important!
+```
+
+To require this module explicitly, use `require('buffer/')` which tells the node.js module
+lookup algorithm (also used by browserify) to use the **npm module** named `buffer`
+instead of the **node.js core** module named `buffer`!
+
+
+## how does it work?
+
+The Buffer constructor returns instances of `Uint8Array` that have their prototype
+changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of `Uint8Array`,
+so the returned instances will have all the node `Buffer` methods and the
+`Uint8Array` methods. Square bracket notation works as expected -- it returns a
+single octet.
+
+The `Uint8Array` prototype remains unmodified.
+
+
+## tracking the latest node api
+
+This module tracks the Buffer API in the latest (unstable) version of node.js. The Buffer
+API is considered **stable** in the
+[node stability index](https://nodejs.org/docs/latest/api/documentation.html#documentation_stability_index),
+so it is unlikely that there will ever be breaking changes.
+Nonetheless, when/if the Buffer API changes in node, this module's API will change
+accordingly.
+
+## related packages
+
+- [`buffer-reverse`](https://www.npmjs.com/package/buffer-reverse) - Reverse a buffer
+- [`buffer-xor`](https://www.npmjs.com/package/buffer-xor) - Bitwise xor a buffer
+- [`is-buffer`](https://www.npmjs.com/package/is-buffer) - Determine if an object is a Buffer without including the whole `Buffer` package
+
+## conversion packages
+
+### convert typed array to buffer
+
+Use [`typedarray-to-buffer`](https://www.npmjs.com/package/typedarray-to-buffer) to convert any kind of typed array to a `Buffer`. Does not perform a copy, so it's super fast.
+
+### convert buffer to typed array
+
+`Buffer` is a subclass of `Uint8Array` (which is a typed array). So there is no need to explicitly convert to typed array. Just use the buffer as a `Uint8Array`.
+
+### convert blob to buffer
+
+Use [`blob-to-buffer`](https://www.npmjs.com/package/blob-to-buffer) to convert a `Blob` to a `Buffer`.
+
+### convert buffer to blob
+
+To convert a `Buffer` to a `Blob`, use the `Blob` constructor:
+
+```js
+var blob = new Blob([ buffer ])
+```
+
+Optionally, specify a mimetype:
+
+```js
+var blob = new Blob([ buffer ], { type: 'text/html' })
+```
+
+### convert arraybuffer to buffer
+
+To convert an `ArrayBuffer` to a `Buffer`, use the `Buffer.from` function. Does not perform a copy, so it's super fast.
+
+```js
+var buffer = Buffer.from(arrayBuffer)
+```
+
+### convert buffer to arraybuffer
+
+To convert a `Buffer` to an `ArrayBuffer`, use the `.buffer` property (which is present on all `Uint8Array` objects):
+
+```js
+var arrayBuffer = buffer.buffer.slice(
+  buffer.byteOffset, buffer.byteOffset + buffer.byteLength
+)
+```
+
+Alternatively, use the [`to-arraybuffer`](https://www.npmjs.com/package/to-arraybuffer) module.
+
+## performance
+
+See perf tests in `/perf`.
+
+`BrowserBuffer` is the browser `buffer` module (this repo). `Uint8Array` is included as a
+sanity check (since `BrowserBuffer` uses `Uint8Array` under the hood, `Uint8Array` will
+always be at least a bit faster). Finally, `NodeBuffer` is the node.js buffer module,
+which is included to compare against.
+
+NOTE: Performance has improved since these benchmarks were taken. PR welcome to update the README.
+
+### Chrome 38
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 11,457,464 ops/sec | ±0.86% | 66 | ✓ |
+| Uint8Array#bracket-notation | 10,824,332 ops/sec | ±0.74% | 65 | |
+| | | | |
+| BrowserBuffer#concat | 450,532 ops/sec | ±0.76% | 68 | |
+| Uint8Array#concat | 1,368,911 ops/sec | ±1.50% | 62 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 903,001 ops/sec | ±0.96% | 67 | |
+| Uint8Array#copy(16000) | 1,422,441 ops/sec | ±1.04% | 66 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 11,431,358 ops/sec | ±0.46% | 69 | |
+| Uint8Array#copy(16) | 13,944,163 ops/sec | ±1.12% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 106,329 ops/sec | ±6.70% | 44 | |
+| Uint8Array#new(16000) | 131,001 ops/sec | ±2.85% | 31 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,554,491 ops/sec | ±1.60% | 65 | |
+| Uint8Array#new(16) | 6,623,930 ops/sec | ±1.66% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 112,830 ops/sec | ±0.51% | 69 | ✓ |
+| DataView#getFloat64 | 93,500 ops/sec | ±0.57% | 68 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 146,678 ops/sec | ±0.95% | 68 | ✓ |
+| DataView#getFloat32 | 99,311 ops/sec | ±0.41% | 67 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 843,214 ops/sec | ±0.70% | 69 | ✓ |
+| DataView#getUint32 | 103,024 ops/sec | ±0.64% | 67 | |
+| | | | |
+| BrowserBuffer#slice | 1,013,941 ops/sec | ±0.75% | 67 | |
+| Uint8Array#subarray | 1,903,928 ops/sec | ±0.53% | 67 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 61,387 ops/sec | ±0.90% | 67 | |
+| DataView#setFloat32 | 141,249 ops/sec | ±0.40% | 66 | ✓ |
+
+
+### Firefox 33
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 20,800,421 ops/sec | ±1.84% | 60 | |
+| Uint8Array#bracket-notation | 20,826,235 ops/sec | ±2.02% | 61 | ✓ |
+| | | | |
+| BrowserBuffer#concat | 153,076 ops/sec | ±2.32% | 61 | |
+| Uint8Array#concat | 1,255,674 ops/sec | ±8.65% | 52 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,105,312 ops/sec | ±1.16% | 63 | |
+| Uint8Array#copy(16000) | 1,615,911 ops/sec | ±0.55% | 66 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 16,357,599 ops/sec | ±0.73% | 68 | |
+| Uint8Array#copy(16) | 31,436,281 ops/sec | ±1.05% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 52,995 ops/sec | ±6.01% | 35 | |
+| Uint8Array#new(16000) | 87,686 ops/sec | ±5.68% | 45 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 252,031 ops/sec | ±1.61% | 66 | |
+| Uint8Array#new(16) | 8,477,026 ops/sec | ±0.49% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 99,871 ops/sec | ±0.41% | 69 | |
+| DataView#getFloat64 | 285,663 ops/sec | ±0.70% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readFloatBE | 115,540 ops/sec | ±0.42% | 69 | |
+| DataView#getFloat32 | 288,722 ops/sec | ±0.82% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readUInt32LE | 633,926 ops/sec | ±1.08% | 67 | ✓ |
+| DataView#getUint32 | 294,808 ops/sec | ±0.79% | 64 | |
+| | | | |
+| BrowserBuffer#slice | 349,425 ops/sec | ±0.46% | 69 | |
+| Uint8Array#subarray | 5,965,819 ops/sec | ±0.60% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 59,980 ops/sec | ±0.41% | 67 | |
+| DataView#setFloat32 | 317,634 ops/sec | ±0.63% | 68 | ✓ |
+
+### Safari 8
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,279,729 ops/sec | ±2.25% | 56 | ✓ |
+| Uint8Array#bracket-notation | 10,030,767 ops/sec | ±2.23% | 59 | |
+| | | | |
+| BrowserBuffer#concat | 144,138 ops/sec | ±1.38% | 65 | |
+| Uint8Array#concat | 4,950,764 ops/sec | ±1.70% | 63 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,058,548 ops/sec | ±1.51% | 64 | |
+| Uint8Array#copy(16000) | 1,409,666 ops/sec | ±1.17% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 6,282,529 ops/sec | ±1.88% | 58 | |
+| Uint8Array#copy(16) | 11,907,128 ops/sec | ±2.87% | 58 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 101,663 ops/sec | ±3.89% | 57 | |
+| Uint8Array#new(16000) | 22,050,818 ops/sec | ±6.51% | 46 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 176,072 ops/sec | ±2.13% | 64 | |
+| Uint8Array#new(16) | 24,385,731 ops/sec | ±5.01% | 51 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 41,341 ops/sec | ±1.06% | 67 | |
+| DataView#getFloat64 | 322,280 ops/sec | ±0.84% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readFloatBE | 46,141 ops/sec | ±1.06% | 65 | |
+| DataView#getFloat32 | 337,025 ops/sec | ±0.43% | 69 | ✓ |
+| | | | |
+| BrowserBuffer#readUInt32LE | 151,551 ops/sec | ±1.02% | 66 | |
+| DataView#getUint32 | 308,278 ops/sec | ±0.94% | 67 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 197,365 ops/sec | ±0.95% | 66 | |
+| Uint8Array#subarray | 9,558,024 ops/sec | ±3.08% | 58 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 17,518 ops/sec | ±1.03% | 63 | |
+| DataView#setFloat32 | 319,751 ops/sec | ±0.48% | 68 | ✓ |
+
+
+### Node 0.11.14
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,489,828 ops/sec | ±3.25% | 90 | |
+| Uint8Array#bracket-notation | 10,534,884 ops/sec | ±0.81% | 92 | ✓ |
+| NodeBuffer#bracket-notation | 10,389,910 ops/sec | ±0.97% | 87 | |
+| | | | |
+| BrowserBuffer#concat | 487,830 ops/sec | ±2.58% | 88 | |
+| Uint8Array#concat | 1,814,327 ops/sec | ±1.28% | 88 | ✓ |
+| NodeBuffer#concat | 1,636,523 ops/sec | ±1.88% | 73 | |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,073,665 ops/sec | ±0.77% | 90 | |
+| Uint8Array#copy(16000) | 1,348,517 ops/sec | ±0.84% | 89 | ✓ |
+| NodeBuffer#copy(16000) | 1,289,533 ops/sec | ±0.82% | 93 | |
+| | | | |
+| BrowserBuffer#copy(16) | 12,782,706 ops/sec | ±0.74% | 85 | |
+| Uint8Array#copy(16) | 14,180,427 ops/sec | ±0.93% | 92 | ✓ |
+| NodeBuffer#copy(16) | 11,083,134 ops/sec | ±1.06% | 89 | |
+| | | | |
+| BrowserBuffer#new(16000) | 141,678 ops/sec | ±3.30% | 67 | |
+| Uint8Array#new(16000) | 161,491 ops/sec | ±2.96% | 60 | |
+| NodeBuffer#new(16000) | 292,699 ops/sec | ±3.20% | 55 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,655,466 ops/sec | ±2.41% | 82 | |
+| Uint8Array#new(16) | 14,399,926 ops/sec | ±0.91% | 94 | ✓ |
+| NodeBuffer#new(16) | 3,894,696 ops/sec | ±0.88% | 92 | |
+| | | | |
+| BrowserBuffer#readDoubleBE | 109,582 ops/sec | ±0.75% | 93 | ✓ |
+| DataView#getFloat64 | 91,235 ops/sec | ±0.81% | 90 | |
+| NodeBuffer#readDoubleBE | 88,593 ops/sec | ±0.96% | 81 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 139,854 ops/sec | ±1.03% | 85 | ✓ |
+| DataView#getFloat32 | 98,744 ops/sec | ±0.80% | 89 | |
+| NodeBuffer#readFloatBE | 92,769 ops/sec | ±0.94% | 93 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 710,861 ops/sec | ±0.82% | 92 | |
+| DataView#getUint32 | 117,893 ops/sec | ±0.84% | 91 | |
+| NodeBuffer#readUInt32LE | 851,412 ops/sec | ±0.72% | 93 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 1,673,877 ops/sec | ±0.73% | 94 | |
+| Uint8Array#subarray | 6,919,243 ops/sec | ±0.67% | 90 | ✓ |
+| NodeBuffer#slice | 4,617,604 ops/sec | ±0.79% | 93 | |
+| | | | |
+| BrowserBuffer#writeFloatBE | 66,011 ops/sec | ±0.75% | 93 | |
+| DataView#setFloat32 | 127,760 ops/sec | ±0.72% | 93 | ✓ |
+| NodeBuffer#writeFloatBE | 103,352 ops/sec | ±0.83% | 93 | |
+
+### iojs 1.8.1
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,990,488 ops/sec | ±1.11% | 91 | |
+| Uint8Array#bracket-notation | 11,268,757 ops/sec | ±0.65% | 97 | |
+| NodeBuffer#bracket-notation | 11,353,260 ops/sec | ±0.83% | 94 | ✓ |
+| | | | |
+| BrowserBuffer#concat | 378,954 ops/sec | ±0.74% | 94 | |
+| Uint8Array#concat | 1,358,288 ops/sec | ±0.97% | 87 | |
+| NodeBuffer#concat | 1,934,050 ops/sec | ±1.11% | 78 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 894,538 ops/sec | ±0.56% | 84 | |
+| Uint8Array#copy(16000) | 1,442,656 ops/sec | ±0.71% | 96 | |
+| NodeBuffer#copy(16000) | 1,457,898 ops/sec | ±0.53% | 92 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 12,870,457 ops/sec | ±0.67% | 95 | |
+| Uint8Array#copy(16) | 16,643,989 ops/sec | ±0.61% | 93 | ✓ |
+| NodeBuffer#copy(16) | 14,885,848 ops/sec | ±0.74% | 94 | |
+| | | | |
+| BrowserBuffer#new(16000) | 109,264 ops/sec | ±4.21% | 63 | |
+| Uint8Array#new(16000) | 138,916 ops/sec | ±1.87% | 61 | |
+| NodeBuffer#new(16000) | 281,449 ops/sec | ±3.58% | 51 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,362,935 ops/sec | ±0.56% | 99 | |
+| Uint8Array#new(16) | 6,193,090 ops/sec | ±0.64% | 95 | ✓ |
+| NodeBuffer#new(16) | 4,745,425 ops/sec | ±1.56% | 90 | |
+| | | | |
+| BrowserBuffer#readDoubleBE | 118,127 ops/sec | ±0.59% | 93 | ✓ |
+| DataView#getFloat64 | 107,332 ops/sec | ±0.65% | 91 | |
+| NodeBuffer#readDoubleBE | 116,274 ops/sec | ±0.94% | 95 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 150,326 ops/sec | ±0.58% | 95 | ✓ |
+| DataView#getFloat32 | 110,541 ops/sec | ±0.57% | 98 | |
+| NodeBuffer#readFloatBE | 121,599 ops/sec | ±0.60% | 87 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 814,147 ops/sec | ±0.62% | 93 | |
+| DataView#getUint32 | 137,592 ops/sec | ±0.64% | 90 | |
+| NodeBuffer#readUInt32LE | 931,650 ops/sec | ±0.71% | 96 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 878,590 ops/sec | ±0.68% | 93 | |
+| Uint8Array#subarray | 2,843,308 ops/sec | ±1.02% | 90 | |
+| NodeBuffer#slice | 4,998,316 ops/sec | ±0.68% | 90 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 65,927 ops/sec | ±0.74% | 93 | |
+| DataView#setFloat32 | 139,823 ops/sec | ±0.97% | 89 | ✓ |
+| NodeBuffer#writeFloatBE | 135,763 ops/sec | ±0.65% | 96 | |
+| | | | |
+
+## Testing the project
+
+First, install the project:
+
+    npm install
+
+Then, to run tests in Node.js, run:
+
+    npm run test-node
+
+To test locally in a browser, you can run:
+
+    npm run test-browser-es5-local # For ES5 browsers that don't support ES6
+    npm run test-browser-es6-local # For ES6 compliant browsers
+
+This will print out a URL that you can then open in a browser to run the tests, using [airtap](https://www.npmjs.com/package/airtap).
+
+To run automated browser tests using Saucelabs, ensure that your `SAUCE_USERNAME` and `SAUCE_ACCESS_KEY` environment variables are set, then run:
+
+    npm test
+
+This is what's run in Travis, to check against various browsers. The list of browsers is kept in the `bin/airtap-es5.yml` and `bin/airtap-es6.yml` files.
+
+## JavaScript Standard Style
+
+This module uses [JavaScript Standard Style](https://github.com/feross/standard).
+
+[![JavaScript Style Guide](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard)
+
+To test that the code conforms to the style, `npm install` and run:
+
+    ./node_modules/.bin/standard
+
+## credit
+
+This was originally forked from [buffer-browserify](https://github.com/toots/buffer-browserify).
+
+## Security Policies and Procedures
+
+The `buffer` team and community take all security bugs in `buffer` seriously. Please see our [security policies and procedures](https://github.com/feross/security) document to learn how to report issues.
+
+## license
+
+MIT. Copyright (C) [Feross Aboukhadijeh](http://feross.org), and other contributors. Originally forked from an MIT-licensed module by Romain Beauxis.
diff --git a/mqtt-backend/node_modules/bl/node_modules/buffer/index.d.ts b/mqtt-backend/node_modules/bl/node_modules/buffer/index.d.ts
new file mode 100644
index 0000000..07096a2
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/node_modules/buffer/index.d.ts
@@ -0,0 +1,194 @@
+export class Buffer extends Uint8Array {
+    length: number
+    write(string: string, offset?: number, length?: number, encoding?: string): number;
+    toString(encoding?: string, start?: number, end?: number): string;
+    toJSON(): { type: 'Buffer', data: any[] };
+    equals(otherBuffer: Buffer): boolean;
+    compare(otherBuffer: Uint8Array, targetStart?: number, targetEnd?: number, sourceStart?: number, sourceEnd?: number): number;
+    copy(targetBuffer: Buffer, targetStart?: number, sourceStart?: number, sourceEnd?: number): number;
+    slice(start?: number, end?: number): Buffer;
+    writeUIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeUIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    readUIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readUIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readUInt8(offset: number, noAssert?: boolean): number;
+    readUInt16LE(offset: number, noAssert?: boolean): number;
+    readUInt16BE(offset: number, noAssert?: boolean): number;
+    readUInt32LE(offset: number, noAssert?: boolean): number;
+    readUInt32BE(offset: number, noAssert?: boolean): number;
+    readBigUInt64LE(offset: number): BigInt;
+    readBigUInt64BE(offset: number): BigInt;
+    readInt8(offset: number, noAssert?: boolean): number;
+    readInt16LE(offset: number, noAssert?: boolean): number;
+    readInt16BE(offset: number, noAssert?: boolean): number;
+    readInt32LE(offset: number, noAssert?: boolean): number;
+    readInt32BE(offset: number, noAssert?: boolean): number;
+    readBigInt64LE(offset: number): BigInt;
+    readBigInt64BE(offset: number): BigInt;
+    readFloatLE(offset: number, noAssert?: boolean): number;
+    readFloatBE(offset: number, noAssert?: boolean): number;
+    readDoubleLE(offset: number, noAssert?: boolean): number;
+    readDoubleBE(offset: number, noAssert?: boolean): number;
+    reverse(): this;
+    swap16(): Buffer;
+    swap32(): Buffer;
+    swap64(): Buffer;
+    writeUInt8(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt16LE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt16BE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt32LE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt32BE(value: number, offset: number, noAssert?: boolean): number;
+    writeBigUInt64LE(value: number, offset: number): BigInt;
+    writeBigUInt64BE(value: number, offset: number): BigInt;
+    writeInt8(value: number, offset: number, noAssert?: boolean): number;
+    writeInt16LE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt16BE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt32LE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt32BE(value: number, offset: number, noAssert?: boolean): number;
+    writeBigInt64LE(value: number, offset: number): BigInt;
+    writeBigInt64BE(value: number, offset: number): BigInt;
+    writeFloatLE(value: number, offset: number, noAssert?: boolean): number;
+    writeFloatBE(value: number, offset: number, noAssert?: boolean): number;
+    writeDoubleLE(value: number, offset: number, noAssert?: boolean): number;
+    writeDoubleBE(value: number, offset: number, noAssert?: boolean): number;
+    fill(value: any, offset?: number, end?: number): this;
+    indexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+    lastIndexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+    includes(value: string | number | Buffer, byteOffset?: number, encoding?: string): boolean;
+
+    /**
+     * Allocates a new buffer containing the given {str}.
+     *
+     * @param str String to store in buffer.
+     * @param encoding encoding to use, optional.  Default is 'utf8'
+     */
+    constructor (str: string, encoding?: string);
+    /**
+     * Allocates a new buffer of {size} octets.
+     *
+     * @param size count of octets to allocate.
+     */
+    constructor (size: number);
+    /**
+     * Allocates a new buffer containing the given {array} of octets.
+     *
+     * @param array The octets to store.
+     */
+    constructor (array: Uint8Array);
+    /**
+     * Produces a Buffer backed by the same allocated memory as
+     * the given {ArrayBuffer}.
+     *
+     *
+     * @param arrayBuffer The ArrayBuffer with which to share memory.
+     */
+    constructor (arrayBuffer: ArrayBuffer);
+    /**
+     * Allocates a new buffer containing the given {array} of octets.
+     *
+     * @param array The octets to store.
+     */
+    constructor (array: any[]);
+    /**
+     * Copies the passed {buffer} data onto a new {Buffer} instance.
+     *
+     * @param buffer The buffer to copy.
+     */
+    constructor (buffer: Buffer);
+    prototype: Buffer;
+    /**
+     * Allocates a new Buffer using an {array} of octets.
+     *
+     * @param array
+     */
+    static from(array: any[]): Buffer;
+    /**
+     * When passed a reference to the .buffer property of a TypedArray instance,
+     * the newly created Buffer will share the same allocated memory as the TypedArray.
+     * The optional {byteOffset} and {length} arguments specify a memory range
+     * within the {arrayBuffer} that will be shared by the Buffer.
+     *
+     * @param arrayBuffer The .buffer property of a TypedArray or a new ArrayBuffer()
+     * @param byteOffset
+     * @param length
+     */
+    static from(arrayBuffer: ArrayBuffer, byteOffset?: number, length?: number): Buffer;
+    /**
+     * Copies the passed {buffer} data onto a new Buffer instance.
+     *
+     * @param buffer
+     */
+    static from(buffer: Buffer | Uint8Array): Buffer;
+    /**
+     * Creates a new Buffer containing the given JavaScript string {str}.
+     * If provided, the {encoding} parameter identifies the character encoding.
+     * If not provided, {encoding} defaults to 'utf8'.
+     *
+     * @param str
+     */
+    static from(str: string, encoding?: string): Buffer;
+    /**
+     * Returns true if {obj} is a Buffer
+     *
+     * @param obj object to test.
+     */
+    static isBuffer(obj: any): obj is Buffer;
+    /**
+     * Returns true if {encoding} is a valid encoding argument.
+     * Valid string encodings in Node 0.12: 'ascii'|'utf8'|'utf16le'|'ucs2'(alias of 'utf16le')|'base64'|'binary'(deprecated)|'hex'
+     *
+     * @param encoding string to test.
+     */
+    static isEncoding(encoding: string): boolean;
+    /**
+     * Gives the actual byte length of a string. encoding defaults to 'utf8'.
+     * This is not the same as String.prototype.length since that returns the number of characters in a string.
+     *
+     * @param string string to test.
+     * @param encoding encoding used to evaluate (defaults to 'utf8')
+     */
+    static byteLength(string: string, encoding?: string): number;
+    /**
+     * Returns a buffer which is the result of concatenating all the buffers in the list together.
+     *
+     * If the list has no items, or if the totalLength is 0, then it returns a zero-length buffer.
+     * If the list has exactly one item, then the first item of the list is returned.
+     * If the list has more than one item, then a new Buffer is created.
+     *
+     * @param list An array of Buffer objects to concatenate
+     * @param totalLength Total length of the buffers when concatenated.
+     *   If totalLength is not provided, it is read from the buffers in the list. However, this adds an additional loop to the function, so it is faster to provide the length explicitly.
+     */
+    static concat(list: Uint8Array[], totalLength?: number): Buffer;
+    /**
+     * The same as buf1.compare(buf2).
+     */
+    static compare(buf1: Uint8Array, buf2: Uint8Array): number;
+    /**
+     * Allocates a new buffer of {size} octets.
+     *
+     * @param size count of octets to allocate.
+     * @param fill if specified, buffer will be initialized by calling buf.fill(fill).
+     *    If parameter is omitted, buffer will be filled with zeros.
+     * @param encoding encoding used for call to buf.fill while initializing
+     */
+    static alloc(size: number, fill?: string | Buffer | number, encoding?: string): Buffer;
+    /**
+     * Allocates a new buffer of {size} octets, leaving memory not initialized, so the contents
+     * of the newly created Buffer are unknown and may contain sensitive data.
+     *
+     * @param size count of octets to allocate
+     */
+    static allocUnsafe(size: number): Buffer;
+    /**
+     * Allocates a new non-pooled buffer of {size} octets, leaving memory not initialized, so the contents
+     * of the newly created Buffer are unknown and may contain sensitive data.
+     *
+     * @param size count of octets to allocate
+     */
+    static allocUnsafeSlow(size: number): Buffer;
+}
diff --git a/mqtt-backend/node_modules/bl/node_modules/buffer/index.js b/mqtt-backend/node_modules/bl/node_modules/buffer/index.js
new file mode 100644
index 0000000..7a0e9c2
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/node_modules/buffer/index.js
@@ -0,0 +1,2106 @@
+/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <https://feross.org>
+ * @license  MIT
+ */
+/* eslint-disable no-proto */
+
+'use strict'
+
+const base64 = require('base64-js')
+const ieee754 = require('ieee754')
+const customInspectSymbol =
+  (typeof Symbol === 'function' && typeof Symbol['for'] === 'function') // eslint-disable-line dot-notation
+    ? Symbol['for']('nodejs.util.inspect.custom') // eslint-disable-line dot-notation
+    : null
+
+exports.Buffer = Buffer
+exports.SlowBuffer = SlowBuffer
+exports.INSPECT_MAX_BYTES = 50
+
+const K_MAX_LENGTH = 0x7fffffff
+exports.kMaxLength = K_MAX_LENGTH
+
+/**
+ * If `Buffer.TYPED_ARRAY_SUPPORT`:
+ *   === true    Use Uint8Array implementation (fastest)
+ *   === false   Print warning and recommend using `buffer` v4.x which has an Object
+ *               implementation (most compatible, even IE6)
+ *
+ * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
+ * Opera 11.6+, iOS 4.2+.
+ *
+ * We report that the browser does not support typed arrays if the are not subclassable
+ * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
+ * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
+ * for __proto__ and has a buggy typed array implementation.
+ */
+Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()
+
+if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
+    typeof console.error === 'function') {
+  console.error(
+    'This browser lacks typed array (Uint8Array) support which is required by ' +
+    '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
+  )
+}
+
+function typedArraySupport () {
+  // Can typed array instances can be augmented?
+  try {
+    const arr = new Uint8Array(1)
+    const proto = { foo: function () { return 42 } }
+    Object.setPrototypeOf(proto, Uint8Array.prototype)
+    Object.setPrototypeOf(arr, proto)
+    return arr.foo() === 42
+  } catch (e) {
+    return false
+  }
+}
+
+Object.defineProperty(Buffer.prototype, 'parent', {
+  enumerable: true,
+  get: function () {
+    if (!Buffer.isBuffer(this)) return undefined
+    return this.buffer
+  }
+})
+
+Object.defineProperty(Buffer.prototype, 'offset', {
+  enumerable: true,
+  get: function () {
+    if (!Buffer.isBuffer(this)) return undefined
+    return this.byteOffset
+  }
+})
+
+function createBuffer (length) {
+  if (length > K_MAX_LENGTH) {
+    throw new RangeError('The value "' + length + '" is invalid for option "size"')
+  }
+  // Return an augmented `Uint8Array` instance
+  const buf = new Uint8Array(length)
+  Object.setPrototypeOf(buf, Buffer.prototype)
+  return buf
+}
+
+/**
+ * The Buffer constructor returns instances of `Uint8Array` that have their
+ * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
+ * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
+ * and the `Uint8Array` methods. Square bracket notation works as expected -- it
+ * returns a single octet.
+ *
+ * The `Uint8Array` prototype remains unmodified.
+ */
+
+function Buffer (arg, encodingOrOffset, length) {
+  // Common case.
+  if (typeof arg === 'number') {
+    if (typeof encodingOrOffset === 'string') {
+      throw new TypeError(
+        'The "string" argument must be of type string. Received type number'
+      )
+    }
+    return allocUnsafe(arg)
+  }
+  return from(arg, encodingOrOffset, length)
+}
+
+Buffer.poolSize = 8192 // not used by this implementation
+
+function from (value, encodingOrOffset, length) {
+  if (typeof value === 'string') {
+    return fromString(value, encodingOrOffset)
+  }
+
+  if (ArrayBuffer.isView(value)) {
+    return fromArrayView(value)
+  }
+
+  if (value == null) {
+    throw new TypeError(
+      'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
+      'or Array-like Object. Received type ' + (typeof value)
+    )
+  }
+
+  if (isInstance(value, ArrayBuffer) ||
+      (value && isInstance(value.buffer, ArrayBuffer))) {
+    return fromArrayBuffer(value, encodingOrOffset, length)
+  }
+
+  if (typeof SharedArrayBuffer !== 'undefined' &&
+      (isInstance(value, SharedArrayBuffer) ||
+      (value && isInstance(value.buffer, SharedArrayBuffer)))) {
+    return fromArrayBuffer(value, encodingOrOffset, length)
+  }
+
+  if (typeof value === 'number') {
+    throw new TypeError(
+      'The "value" argument must not be of type number. Received type number'
+    )
+  }
+
+  const valueOf = value.valueOf && value.valueOf()
+  if (valueOf != null && valueOf !== value) {
+    return Buffer.from(valueOf, encodingOrOffset, length)
+  }
+
+  const b = fromObject(value)
+  if (b) return b
+
+  if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
+      typeof value[Symbol.toPrimitive] === 'function') {
+    return Buffer.from(value[Symbol.toPrimitive]('string'), encodingOrOffset, length)
+  }
+
+  throw new TypeError(
+    'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
+    'or Array-like Object. Received type ' + (typeof value)
+  )
+}
+
+/**
+ * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
+ * if value is a number.
+ * Buffer.from(str[, encoding])
+ * Buffer.from(array)
+ * Buffer.from(buffer)
+ * Buffer.from(arrayBuffer[, byteOffset[, length]])
+ **/
+Buffer.from = function (value, encodingOrOffset, length) {
+  return from(value, encodingOrOffset, length)
+}
+
+// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
+// https://github.com/feross/buffer/pull/148
+Object.setPrototypeOf(Buffer.prototype, Uint8Array.prototype)
+Object.setPrototypeOf(Buffer, Uint8Array)
+
+function assertSize (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('"size" argument must be of type number')
+  } else if (size < 0) {
+    throw new RangeError('The value "' + size + '" is invalid for option "size"')
+  }
+}
+
+function alloc (size, fill, encoding) {
+  assertSize(size)
+  if (size <= 0) {
+    return createBuffer(size)
+  }
+  if (fill !== undefined) {
+    // Only pay attention to encoding if it's a string. This
+    // prevents accidentally sending in a number that would
+    // be interpreted as a start offset.
+    return typeof encoding === 'string'
+      ? createBuffer(size).fill(fill, encoding)
+      : createBuffer(size).fill(fill)
+  }
+  return createBuffer(size)
+}
+
+/**
+ * Creates a new filled Buffer instance.
+ * alloc(size[, fill[, encoding]])
+ **/
+Buffer.alloc = function (size, fill, encoding) {
+  return alloc(size, fill, encoding)
+}
+
+function allocUnsafe (size) {
+  assertSize(size)
+  return createBuffer(size < 0 ? 0 : checked(size) | 0)
+}
+
+/**
+ * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
+ * */
+Buffer.allocUnsafe = function (size) {
+  return allocUnsafe(size)
+}
+/**
+ * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
+ */
+Buffer.allocUnsafeSlow = function (size) {
+  return allocUnsafe(size)
+}
+
+function fromString (string, encoding) {
+  if (typeof encoding !== 'string' || encoding === '') {
+    encoding = 'utf8'
+  }
+
+  if (!Buffer.isEncoding(encoding)) {
+    throw new TypeError('Unknown encoding: ' + encoding)
+  }
+
+  const length = byteLength(string, encoding) | 0
+  let buf = createBuffer(length)
+
+  const actual = buf.write(string, encoding)
+
+  if (actual !== length) {
+    // Writing a hex string, for example, that contains invalid characters will
+    // cause everything after the first invalid character to be ignored. (e.g.
+    // 'abxxcd' will be treated as 'ab')
+    buf = buf.slice(0, actual)
+  }
+
+  return buf
+}
+
+function fromArrayLike (array) {
+  const length = array.length < 0 ? 0 : checked(array.length) | 0
+  const buf = createBuffer(length)
+  for (let i = 0; i < length; i += 1) {
+    buf[i] = array[i] & 255
+  }
+  return buf
+}
+
+function fromArrayView (arrayView) {
+  if (isInstance(arrayView, Uint8Array)) {
+    const copy = new Uint8Array(arrayView)
+    return fromArrayBuffer(copy.buffer, copy.byteOffset, copy.byteLength)
+  }
+  return fromArrayLike(arrayView)
+}
+
+function fromArrayBuffer (array, byteOffset, length) {
+  if (byteOffset < 0 || array.byteLength < byteOffset) {
+    throw new RangeError('"offset" is outside of buffer bounds')
+  }
+
+  if (array.byteLength < byteOffset + (length || 0)) {
+    throw new RangeError('"length" is outside of buffer bounds')
+  }
+
+  let buf
+  if (byteOffset === undefined && length === undefined) {
+    buf = new Uint8Array(array)
+  } else if (length === undefined) {
+    buf = new Uint8Array(array, byteOffset)
+  } else {
+    buf = new Uint8Array(array, byteOffset, length)
+  }
+
+  // Return an augmented `Uint8Array` instance
+  Object.setPrototypeOf(buf, Buffer.prototype)
+
+  return buf
+}
+
+function fromObject (obj) {
+  if (Buffer.isBuffer(obj)) {
+    const len = checked(obj.length) | 0
+    const buf = createBuffer(len)
+
+    if (buf.length === 0) {
+      return buf
+    }
+
+    obj.copy(buf, 0, 0, len)
+    return buf
+  }
+
+  if (obj.length !== undefined) {
+    if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
+      return createBuffer(0)
+    }
+    return fromArrayLike(obj)
+  }
+
+  if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
+    return fromArrayLike(obj.data)
+  }
+}
+
+function checked (length) {
+  // Note: cannot use `length < K_MAX_LENGTH` here because that fails when
+  // length is NaN (which is otherwise coerced to zero.)
+  if (length >= K_MAX_LENGTH) {
+    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
+                         'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
+  }
+  return length | 0
+}
+
+function SlowBuffer (length) {
+  if (+length != length) { // eslint-disable-line eqeqeq
+    length = 0
+  }
+  return Buffer.alloc(+length)
+}
+
+Buffer.isBuffer = function isBuffer (b) {
+  return b != null && b._isBuffer === true &&
+    b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false
+}
+
+Buffer.compare = function compare (a, b) {
+  if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength)
+  if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength)
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+    throw new TypeError(
+      'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
+    )
+  }
+
+  if (a === b) return 0
+
+  let x = a.length
+  let y = b.length
+
+  for (let i = 0, len = Math.min(x, y); i < len; ++i) {
+    if (a[i] !== b[i]) {
+      x = a[i]
+      y = b[i]
+      break
+    }
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
+}
+
+Buffer.isEncoding = function isEncoding (encoding) {
+  switch (String(encoding).toLowerCase()) {
+    case 'hex':
+    case 'utf8':
+    case 'utf-8':
+    case 'ascii':
+    case 'latin1':
+    case 'binary':
+    case 'base64':
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      return true
+    default:
+      return false
+  }
+}
+
+Buffer.concat = function concat (list, length) {
+  if (!Array.isArray(list)) {
+    throw new TypeError('"list" argument must be an Array of Buffers')
+  }
+
+  if (list.length === 0) {
+    return Buffer.alloc(0)
+  }
+
+  let i
+  if (length === undefined) {
+    length = 0
+    for (i = 0; i < list.length; ++i) {
+      length += list[i].length
+    }
+  }
+
+  const buffer = Buffer.allocUnsafe(length)
+  let pos = 0
+  for (i = 0; i < list.length; ++i) {
+    let buf = list[i]
+    if (isInstance(buf, Uint8Array)) {
+      if (pos + buf.length > buffer.length) {
+        if (!Buffer.isBuffer(buf)) buf = Buffer.from(buf)
+        buf.copy(buffer, pos)
+      } else {
+        Uint8Array.prototype.set.call(
+          buffer,
+          buf,
+          pos
+        )
+      }
+    } else if (!Buffer.isBuffer(buf)) {
+      throw new TypeError('"list" argument must be an Array of Buffers')
+    } else {
+      buf.copy(buffer, pos)
+    }
+    pos += buf.length
+  }
+  return buffer
+}
+
+function byteLength (string, encoding) {
+  if (Buffer.isBuffer(string)) {
+    return string.length
+  }
+  if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
+    return string.byteLength
+  }
+  if (typeof string !== 'string') {
+    throw new TypeError(
+      'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
+      'Received type ' + typeof string
+    )
+  }
+
+  const len = string.length
+  const mustMatch = (arguments.length > 2 && arguments[2] === true)
+  if (!mustMatch && len === 0) return 0
+
+  // Use a for loop to avoid recursion
+  let loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'ascii':
+      case 'latin1':
+      case 'binary':
+        return len
+      case 'utf8':
+      case 'utf-8':
+        return utf8ToBytes(string).length
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return len * 2
+      case 'hex':
+        return len >>> 1
+      case 'base64':
+        return base64ToBytes(string).length
+      default:
+        if (loweredCase) {
+          return mustMatch ? -1 : utf8ToBytes(string).length // assume utf8
+        }
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+Buffer.byteLength = byteLength
+
+function slowToString (encoding, start, end) {
+  let loweredCase = false
+
+  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
+  // property of a typed array.
+
+  // This behaves neither like String nor Uint8Array in that we set start/end
+  // to their upper/lower bounds if the value passed is out of range.
+  // undefined is handled specially as per ECMA-262 6th Edition,
+  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
+  if (start === undefined || start < 0) {
+    start = 0
+  }
+  // Return early if start > this.length. Done here to prevent potential uint32
+  // coercion fail below.
+  if (start > this.length) {
+    return ''
+  }
+
+  if (end === undefined || end > this.length) {
+    end = this.length
+  }
+
+  if (end <= 0) {
+    return ''
+  }
+
+  // Force coercion to uint32. This will also coerce falsey/NaN values to 0.
+  end >>>= 0
+  start >>>= 0
+
+  if (end <= start) {
+    return ''
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  while (true) {
+    switch (encoding) {
+      case 'hex':
+        return hexSlice(this, start, end)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Slice(this, start, end)
+
+      case 'ascii':
+        return asciiSlice(this, start, end)
+
+      case 'latin1':
+      case 'binary':
+        return latin1Slice(this, start, end)
+
+      case 'base64':
+        return base64Slice(this, start, end)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return utf16leSlice(this, start, end)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = (encoding + '').toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
+// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
+// reliably in a browserify context because there could be multiple different
+// copies of the 'buffer' package in use. This method works even for Buffer
+// instances that were created from another copy of the `buffer` package.
+// See: https://github.com/feross/buffer/issues/154
+Buffer.prototype._isBuffer = true
+
+function swap (b, n, m) {
+  const i = b[n]
+  b[n] = b[m]
+  b[m] = i
+}
+
+Buffer.prototype.swap16 = function swap16 () {
+  const len = this.length
+  if (len % 2 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 16-bits')
+  }
+  for (let i = 0; i < len; i += 2) {
+    swap(this, i, i + 1)
+  }
+  return this
+}
+
+Buffer.prototype.swap32 = function swap32 () {
+  const len = this.length
+  if (len % 4 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 32-bits')
+  }
+  for (let i = 0; i < len; i += 4) {
+    swap(this, i, i + 3)
+    swap(this, i + 1, i + 2)
+  }
+  return this
+}
+
+Buffer.prototype.swap64 = function swap64 () {
+  const len = this.length
+  if (len % 8 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 64-bits')
+  }
+  for (let i = 0; i < len; i += 8) {
+    swap(this, i, i + 7)
+    swap(this, i + 1, i + 6)
+    swap(this, i + 2, i + 5)
+    swap(this, i + 3, i + 4)
+  }
+  return this
+}
+
+Buffer.prototype.toString = function toString () {
+  const length = this.length
+  if (length === 0) return ''
+  if (arguments.length === 0) return utf8Slice(this, 0, length)
+  return slowToString.apply(this, arguments)
+}
+
+Buffer.prototype.toLocaleString = Buffer.prototype.toString
+
+Buffer.prototype.equals = function equals (b) {
+  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
+  if (this === b) return true
+  return Buffer.compare(this, b) === 0
+}
+
+Buffer.prototype.inspect = function inspect () {
+  let str = ''
+  const max = exports.INSPECT_MAX_BYTES
+  str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
+  if (this.length > max) str += ' ... '
+  return '<Buffer ' + str + '>'
+}
+if (customInspectSymbol) {
+  Buffer.prototype[customInspectSymbol] = Buffer.prototype.inspect
+}
+
+Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
+  if (isInstance(target, Uint8Array)) {
+    target = Buffer.from(target, target.offset, target.byteLength)
+  }
+  if (!Buffer.isBuffer(target)) {
+    throw new TypeError(
+      'The "target" argument must be one of type Buffer or Uint8Array. ' +
+      'Received type ' + (typeof target)
+    )
+  }
+
+  if (start === undefined) {
+    start = 0
+  }
+  if (end === undefined) {
+    end = target ? target.length : 0
+  }
+  if (thisStart === undefined) {
+    thisStart = 0
+  }
+  if (thisEnd === undefined) {
+    thisEnd = this.length
+  }
+
+  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
+    throw new RangeError('out of range index')
+  }
+
+  if (thisStart >= thisEnd && start >= end) {
+    return 0
+  }
+  if (thisStart >= thisEnd) {
+    return -1
+  }
+  if (start >= end) {
+    return 1
+  }
+
+  start >>>= 0
+  end >>>= 0
+  thisStart >>>= 0
+  thisEnd >>>= 0
+
+  if (this === target) return 0
+
+  let x = thisEnd - thisStart
+  let y = end - start
+  const len = Math.min(x, y)
+
+  const thisCopy = this.slice(thisStart, thisEnd)
+  const targetCopy = target.slice(start, end)
+
+  for (let i = 0; i < len; ++i) {
+    if (thisCopy[i] !== targetCopy[i]) {
+      x = thisCopy[i]
+      y = targetCopy[i]
+      break
+    }
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
+}
+
+// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
+// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
+//
+// Arguments:
+// - buffer - a Buffer to search
+// - val - a string, Buffer, or number
+// - byteOffset - an index into `buffer`; will be clamped to an int32
+// - encoding - an optional encoding, relevant is val is a string
+// - dir - true for indexOf, false for lastIndexOf
+function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
+  // Empty buffer means no match
+  if (buffer.length === 0) return -1
+
+  // Normalize byteOffset
+  if (typeof byteOffset === 'string') {
+    encoding = byteOffset
+    byteOffset = 0
+  } else if (byteOffset > 0x7fffffff) {
+    byteOffset = 0x7fffffff
+  } else if (byteOffset < -0x80000000) {
+    byteOffset = -0x80000000
+  }
+  byteOffset = +byteOffset // Coerce to Number.
+  if (numberIsNaN(byteOffset)) {
+    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
+    byteOffset = dir ? 0 : (buffer.length - 1)
+  }
+
+  // Normalize byteOffset: negative offsets start from the end of the buffer
+  if (byteOffset < 0) byteOffset = buffer.length + byteOffset
+  if (byteOffset >= buffer.length) {
+    if (dir) return -1
+    else byteOffset = buffer.length - 1
+  } else if (byteOffset < 0) {
+    if (dir) byteOffset = 0
+    else return -1
+  }
+
+  // Normalize val
+  if (typeof val === 'string') {
+    val = Buffer.from(val, encoding)
+  }
+
+  // Finally, search either indexOf (if dir is true) or lastIndexOf
+  if (Buffer.isBuffer(val)) {
+    // Special case: looking for empty string/buffer always fails
+    if (val.length === 0) {
+      return -1
+    }
+    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
+  } else if (typeof val === 'number') {
+    val = val & 0xFF // Search for a byte value [0-255]
+    if (typeof Uint8Array.prototype.indexOf === 'function') {
+      if (dir) {
+        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
+      } else {
+        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
+      }
+    }
+    return arrayIndexOf(buffer, [val], byteOffset, encoding, dir)
+  }
+
+  throw new TypeError('val must be string, number or Buffer')
+}
+
+function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
+  let indexSize = 1
+  let arrLength = arr.length
+  let valLength = val.length
+
+  if (encoding !== undefined) {
+    encoding = String(encoding).toLowerCase()
+    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
+        encoding === 'utf16le' || encoding === 'utf-16le') {
+      if (arr.length < 2 || val.length < 2) {
+        return -1
+      }
+      indexSize = 2
+      arrLength /= 2
+      valLength /= 2
+      byteOffset /= 2
+    }
+  }
+
+  function read (buf, i) {
+    if (indexSize === 1) {
+      return buf[i]
+    } else {
+      return buf.readUInt16BE(i * indexSize)
+    }
+  }
+
+  let i
+  if (dir) {
+    let foundIndex = -1
+    for (i = byteOffset; i < arrLength; i++) {
+      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
+        if (foundIndex === -1) foundIndex = i
+        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
+      } else {
+        if (foundIndex !== -1) i -= i - foundIndex
+        foundIndex = -1
+      }
+    }
+  } else {
+    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
+    for (i = byteOffset; i >= 0; i--) {
+      let found = true
+      for (let j = 0; j < valLength; j++) {
+        if (read(arr, i + j) !== read(val, j)) {
+          found = false
+          break
+        }
+      }
+      if (found) return i
+    }
+  }
+
+  return -1
+}
+
+Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
+  return this.indexOf(val, byteOffset, encoding) !== -1
+}
+
+Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
+}
+
+Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
+}
+
+function hexWrite (buf, string, offset, length) {
+  offset = Number(offset) || 0
+  const remaining = buf.length - offset
+  if (!length) {
+    length = remaining
+  } else {
+    length = Number(length)
+    if (length > remaining) {
+      length = remaining
+    }
+  }
+
+  const strLen = string.length
+
+  if (length > strLen / 2) {
+    length = strLen / 2
+  }
+  let i
+  for (i = 0; i < length; ++i) {
+    const parsed = parseInt(string.substr(i * 2, 2), 16)
+    if (numberIsNaN(parsed)) return i
+    buf[offset + i] = parsed
+  }
+  return i
+}
+
+function utf8Write (buf, string, offset, length) {
+  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+function asciiWrite (buf, string, offset, length) {
+  return blitBuffer(asciiToBytes(string), buf, offset, length)
+}
+
+function base64Write (buf, string, offset, length) {
+  return blitBuffer(base64ToBytes(string), buf, offset, length)
+}
+
+function ucs2Write (buf, string, offset, length) {
+  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+Buffer.prototype.write = function write (string, offset, length, encoding) {
+  // Buffer#write(string)
+  if (offset === undefined) {
+    encoding = 'utf8'
+    length = this.length
+    offset = 0
+  // Buffer#write(string, encoding)
+  } else if (length === undefined && typeof offset === 'string') {
+    encoding = offset
+    length = this.length
+    offset = 0
+  // Buffer#write(string, offset[, length][, encoding])
+  } else if (isFinite(offset)) {
+    offset = offset >>> 0
+    if (isFinite(length)) {
+      length = length >>> 0
+      if (encoding === undefined) encoding = 'utf8'
+    } else {
+      encoding = length
+      length = undefined
+    }
+  } else {
+    throw new Error(
+      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
+    )
+  }
+
+  const remaining = this.length - offset
+  if (length === undefined || length > remaining) length = remaining
+
+  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
+    throw new RangeError('Attempt to write outside buffer bounds')
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  let loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'hex':
+        return hexWrite(this, string, offset, length)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Write(this, string, offset, length)
+
+      case 'ascii':
+      case 'latin1':
+      case 'binary':
+        return asciiWrite(this, string, offset, length)
+
+      case 'base64':
+        // Warning: maxLength not taken into account in base64Write
+        return base64Write(this, string, offset, length)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return ucs2Write(this, string, offset, length)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+Buffer.prototype.toJSON = function toJSON () {
+  return {
+    type: 'Buffer',
+    data: Array.prototype.slice.call(this._arr || this, 0)
+  }
+}
+
+function base64Slice (buf, start, end) {
+  if (start === 0 && end === buf.length) {
+    return base64.fromByteArray(buf)
+  } else {
+    return base64.fromByteArray(buf.slice(start, end))
+  }
+}
+
+function utf8Slice (buf, start, end) {
+  end = Math.min(buf.length, end)
+  const res = []
+
+  let i = start
+  while (i < end) {
+    const firstByte = buf[i]
+    let codePoint = null
+    let bytesPerSequence = (firstByte > 0xEF)
+      ? 4
+      : (firstByte > 0xDF)
+          ? 3
+          : (firstByte > 0xBF)
+              ? 2
+              : 1
+
+    if (i + bytesPerSequence <= end) {
+      let secondByte, thirdByte, fourthByte, tempCodePoint
+
+      switch (bytesPerSequence) {
+        case 1:
+          if (firstByte < 0x80) {
+            codePoint = firstByte
+          }
+          break
+        case 2:
+          secondByte = buf[i + 1]
+          if ((secondByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
+            if (tempCodePoint > 0x7F) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 3:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
+            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 4:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          fourthByte = buf[i + 3]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
+            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
+              codePoint = tempCodePoint
+            }
+          }
+      }
+    }
+
+    if (codePoint === null) {
+      // we did not generate a valid codePoint so insert a
+      // replacement char (U+FFFD) and advance only 1 byte
+      codePoint = 0xFFFD
+      bytesPerSequence = 1
+    } else if (codePoint > 0xFFFF) {
+      // encode to utf16 (surrogate pair dance)
+      codePoint -= 0x10000
+      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
+      codePoint = 0xDC00 | codePoint & 0x3FF
+    }
+
+    res.push(codePoint)
+    i += bytesPerSequence
+  }
+
+  return decodeCodePointsArray(res)
+}
+
+// Based on http://stackoverflow.com/a/22747272/680742, the browser with
+// the lowest limit is Chrome, with 0x10000 args.
+// We go 1 magnitude less, for safety
+const MAX_ARGUMENTS_LENGTH = 0x1000
+
+function decodeCodePointsArray (codePoints) {
+  const len = codePoints.length
+  if (len <= MAX_ARGUMENTS_LENGTH) {
+    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
+  }
+
+  // Decode in chunks to avoid "call stack size exceeded".
+  let res = ''
+  let i = 0
+  while (i < len) {
+    res += String.fromCharCode.apply(
+      String,
+      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
+    )
+  }
+  return res
+}
+
+function asciiSlice (buf, start, end) {
+  let ret = ''
+  end = Math.min(buf.length, end)
+
+  for (let i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i] & 0x7F)
+  }
+  return ret
+}
+
+function latin1Slice (buf, start, end) {
+  let ret = ''
+  end = Math.min(buf.length, end)
+
+  for (let i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i])
+  }
+  return ret
+}
+
+function hexSlice (buf, start, end) {
+  const len = buf.length
+
+  if (!start || start < 0) start = 0
+  if (!end || end < 0 || end > len) end = len
+
+  let out = ''
+  for (let i = start; i < end; ++i) {
+    out += hexSliceLookupTable[buf[i]]
+  }
+  return out
+}
+
+function utf16leSlice (buf, start, end) {
+  const bytes = buf.slice(start, end)
+  let res = ''
+  // If bytes.length is odd, the last 8 bits must be ignored (same as node.js)
+  for (let i = 0; i < bytes.length - 1; i += 2) {
+    res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
+  }
+  return res
+}
+
+Buffer.prototype.slice = function slice (start, end) {
+  const len = this.length
+  start = ~~start
+  end = end === undefined ? len : ~~end
+
+  if (start < 0) {
+    start += len
+    if (start < 0) start = 0
+  } else if (start > len) {
+    start = len
+  }
+
+  if (end < 0) {
+    end += len
+    if (end < 0) end = 0
+  } else if (end > len) {
+    end = len
+  }
+
+  if (end < start) end = start
+
+  const newBuf = this.subarray(start, end)
+  // Return an augmented `Uint8Array` instance
+  Object.setPrototypeOf(newBuf, Buffer.prototype)
+
+  return newBuf
+}
+
+/*
+ * Need to make sure that buffer isn't trying to write out of bounds.
+ */
+function checkOffset (offset, ext, length) {
+  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
+  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
+}
+
+Buffer.prototype.readUintLE =
+Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  let val = this[offset]
+  let mul = 1
+  let i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUintBE =
+Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    checkOffset(offset, byteLength, this.length)
+  }
+
+  let val = this[offset + --byteLength]
+  let mul = 1
+  while (byteLength > 0 && (mul *= 0x100)) {
+    val += this[offset + --byteLength] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUint8 =
+Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  return this[offset]
+}
+
+Buffer.prototype.readUint16LE =
+Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return this[offset] | (this[offset + 1] << 8)
+}
+
+Buffer.prototype.readUint16BE =
+Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return (this[offset] << 8) | this[offset + 1]
+}
+
+Buffer.prototype.readUint32LE =
+Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return ((this[offset]) |
+      (this[offset + 1] << 8) |
+      (this[offset + 2] << 16)) +
+      (this[offset + 3] * 0x1000000)
+}
+
+Buffer.prototype.readUint32BE =
+Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] * 0x1000000) +
+    ((this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    this[offset + 3])
+}
+
+Buffer.prototype.readBigUInt64LE = defineBigIntMethod(function readBigUInt64LE (offset) {
+  offset = offset >>> 0
+  validateNumber(offset, 'offset')
+  const first = this[offset]
+  const last = this[offset + 7]
+  if (first === undefined || last === undefined) {
+    boundsError(offset, this.length - 8)
+  }
+
+  const lo = first +
+    this[++offset] * 2 ** 8 +
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 24
+
+  const hi = this[++offset] +
+    this[++offset] * 2 ** 8 +
+    this[++offset] * 2 ** 16 +
+    last * 2 ** 24
+
+  return BigInt(lo) + (BigInt(hi) << BigInt(32))
+})
+
+Buffer.prototype.readBigUInt64BE = defineBigIntMethod(function readBigUInt64BE (offset) {
+  offset = offset >>> 0
+  validateNumber(offset, 'offset')
+  const first = this[offset]
+  const last = this[offset + 7]
+  if (first === undefined || last === undefined) {
+    boundsError(offset, this.length - 8)
+  }
+
+  const hi = first * 2 ** 24 +
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 8 +
+    this[++offset]
+
+  const lo = this[++offset] * 2 ** 24 +
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 8 +
+    last
+
+  return (BigInt(hi) << BigInt(32)) + BigInt(lo)
+})
+
+Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  let val = this[offset]
+  let mul = 1
+  let i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  let i = byteLength
+  let mul = 1
+  let val = this[offset + --i]
+  while (i > 0 && (mul *= 0x100)) {
+    val += this[offset + --i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  if (!(this[offset] & 0x80)) return (this[offset])
+  return ((0xff - this[offset] + 1) * -1)
+}
+
+Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  const val = this[offset] | (this[offset + 1] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  const val = this[offset + 1] | (this[offset] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset]) |
+    (this[offset + 1] << 8) |
+    (this[offset + 2] << 16) |
+    (this[offset + 3] << 24)
+}
+
+Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] << 24) |
+    (this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    (this[offset + 3])
+}
+
+Buffer.prototype.readBigInt64LE = defineBigIntMethod(function readBigInt64LE (offset) {
+  offset = offset >>> 0
+  validateNumber(offset, 'offset')
+  const first = this[offset]
+  const last = this[offset + 7]
+  if (first === undefined || last === undefined) {
+    boundsError(offset, this.length - 8)
+  }
+
+  const val = this[offset + 4] +
+    this[offset + 5] * 2 ** 8 +
+    this[offset + 6] * 2 ** 16 +
+    (last << 24) // Overflow
+
+  return (BigInt(val) << BigInt(32)) +
+    BigInt(first +
+    this[++offset] * 2 ** 8 +
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 24)
+})
+
+Buffer.prototype.readBigInt64BE = defineBigIntMethod(function readBigInt64BE (offset) {
+  offset = offset >>> 0
+  validateNumber(offset, 'offset')
+  const first = this[offset]
+  const last = this[offset + 7]
+  if (first === undefined || last === undefined) {
+    boundsError(offset, this.length - 8)
+  }
+
+  const val = (first << 24) + // Overflow
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 8 +
+    this[++offset]
+
+  return (BigInt(val) << BigInt(32)) +
+    BigInt(this[++offset] * 2 ** 24 +
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 8 +
+    last)
+})
+
+Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, true, 23, 4)
+}
+
+Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, false, 23, 4)
+}
+
+Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, true, 52, 8)
+}
+
+Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, false, 52, 8)
+}
+
+function checkInt (buf, value, offset, ext, max, min) {
+  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
+  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+}
+
+Buffer.prototype.writeUintLE =
+Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    const maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
+  }
+
+  let mul = 1
+  let i = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUintBE =
+Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    const maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
+  }
+
+  let i = byteLength - 1
+  let mul = 1
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUint8 =
+Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
+  this[offset] = (value & 0xff)
+  return offset + 1
+}
+
+Buffer.prototype.writeUint16LE =
+Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
+
+Buffer.prototype.writeUint16BE =
+Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
+
+Buffer.prototype.writeUint32LE =
+Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset + 3] = (value >>> 24)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 1] = (value >>> 8)
+  this[offset] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeUint32BE =
+Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
+
+function wrtBigUInt64LE (buf, value, offset, min, max) {
+  checkIntBI(value, min, max, buf, offset, 7)
+
+  let lo = Number(value & BigInt(0xffffffff))
+  buf[offset++] = lo
+  lo = lo >> 8
+  buf[offset++] = lo
+  lo = lo >> 8
+  buf[offset++] = lo
+  lo = lo >> 8
+  buf[offset++] = lo
+  let hi = Number(value >> BigInt(32) & BigInt(0xffffffff))
+  buf[offset++] = hi
+  hi = hi >> 8
+  buf[offset++] = hi
+  hi = hi >> 8
+  buf[offset++] = hi
+  hi = hi >> 8
+  buf[offset++] = hi
+  return offset
+}
+
+function wrtBigUInt64BE (buf, value, offset, min, max) {
+  checkIntBI(value, min, max, buf, offset, 7)
+
+  let lo = Number(value & BigInt(0xffffffff))
+  buf[offset + 7] = lo
+  lo = lo >> 8
+  buf[offset + 6] = lo
+  lo = lo >> 8
+  buf[offset + 5] = lo
+  lo = lo >> 8
+  buf[offset + 4] = lo
+  let hi = Number(value >> BigInt(32) & BigInt(0xffffffff))
+  buf[offset + 3] = hi
+  hi = hi >> 8
+  buf[offset + 2] = hi
+  hi = hi >> 8
+  buf[offset + 1] = hi
+  hi = hi >> 8
+  buf[offset] = hi
+  return offset + 8
+}
+
+Buffer.prototype.writeBigUInt64LE = defineBigIntMethod(function writeBigUInt64LE (value, offset = 0) {
+  return wrtBigUInt64LE(this, value, offset, BigInt(0), BigInt('0xffffffffffffffff'))
+})
+
+Buffer.prototype.writeBigUInt64BE = defineBigIntMethod(function writeBigUInt64BE (value, offset = 0) {
+  return wrtBigUInt64BE(this, value, offset, BigInt(0), BigInt('0xffffffffffffffff'))
+})
+
+Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    const limit = Math.pow(2, (8 * byteLength) - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  let i = 0
+  let mul = 1
+  let sub = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    const limit = Math.pow(2, (8 * byteLength) - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  let i = byteLength - 1
+  let mul = 1
+  let sub = 0
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
+  if (value < 0) value = 0xff + value + 1
+  this[offset] = (value & 0xff)
+  return offset + 1
+}
+
+Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
+
+Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
+
+Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 3] = (value >>> 24)
+  return offset + 4
+}
+
+Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  if (value < 0) value = 0xffffffff + value + 1
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeBigInt64LE = defineBigIntMethod(function writeBigInt64LE (value, offset = 0) {
+  return wrtBigUInt64LE(this, value, offset, -BigInt('0x8000000000000000'), BigInt('0x7fffffffffffffff'))
+})
+
+Buffer.prototype.writeBigInt64BE = defineBigIntMethod(function writeBigInt64BE (value, offset = 0) {
+  return wrtBigUInt64BE(this, value, offset, -BigInt('0x8000000000000000'), BigInt('0x7fffffffffffffff'))
+})
+
+function checkIEEE754 (buf, value, offset, ext, max, min) {
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+  if (offset < 0) throw new RangeError('Index out of range')
+}
+
+function writeFloat (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 23, 4)
+  return offset + 4
+}
+
+Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, false, noAssert)
+}
+
+function writeDouble (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 52, 8)
+  return offset + 8
+}
+
+Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, false, noAssert)
+}
+
+// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
+Buffer.prototype.copy = function copy (target, targetStart, start, end) {
+  if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
+  if (!start) start = 0
+  if (!end && end !== 0) end = this.length
+  if (targetStart >= target.length) targetStart = target.length
+  if (!targetStart) targetStart = 0
+  if (end > 0 && end < start) end = start
+
+  // Copy 0 bytes; we're done
+  if (end === start) return 0
+  if (target.length === 0 || this.length === 0) return 0
+
+  // Fatal error conditions
+  if (targetStart < 0) {
+    throw new RangeError('targetStart out of bounds')
+  }
+  if (start < 0 || start >= this.length) throw new RangeError('Index out of range')
+  if (end < 0) throw new RangeError('sourceEnd out of bounds')
+
+  // Are we oob?
+  if (end > this.length) end = this.length
+  if (target.length - targetStart < end - start) {
+    end = target.length - targetStart + start
+  }
+
+  const len = end - start
+
+  if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
+    // Use built-in when available, missing from IE11
+    this.copyWithin(targetStart, start, end)
+  } else {
+    Uint8Array.prototype.set.call(
+      target,
+      this.subarray(start, end),
+      targetStart
+    )
+  }
+
+  return len
+}
+
+// Usage:
+//    buffer.fill(number[, offset[, end]])
+//    buffer.fill(buffer[, offset[, end]])
+//    buffer.fill(string[, offset[, end]][, encoding])
+Buffer.prototype.fill = function fill (val, start, end, encoding) {
+  // Handle string cases:
+  if (typeof val === 'string') {
+    if (typeof start === 'string') {
+      encoding = start
+      start = 0
+      end = this.length
+    } else if (typeof end === 'string') {
+      encoding = end
+      end = this.length
+    }
+    if (encoding !== undefined && typeof encoding !== 'string') {
+      throw new TypeError('encoding must be a string')
+    }
+    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
+      throw new TypeError('Unknown encoding: ' + encoding)
+    }
+    if (val.length === 1) {
+      const code = val.charCodeAt(0)
+      if ((encoding === 'utf8' && code < 128) ||
+          encoding === 'latin1') {
+        // Fast path: If `val` fits into a single byte, use that numeric value.
+        val = code
+      }
+    }
+  } else if (typeof val === 'number') {
+    val = val & 255
+  } else if (typeof val === 'boolean') {
+    val = Number(val)
+  }
+
+  // Invalid ranges are not set to a default, so can range check early.
+  if (start < 0 || this.length < start || this.length < end) {
+    throw new RangeError('Out of range index')
+  }
+
+  if (end <= start) {
+    return this
+  }
+
+  start = start >>> 0
+  end = end === undefined ? this.length : end >>> 0
+
+  if (!val) val = 0
+
+  let i
+  if (typeof val === 'number') {
+    for (i = start; i < end; ++i) {
+      this[i] = val
+    }
+  } else {
+    const bytes = Buffer.isBuffer(val)
+      ? val
+      : Buffer.from(val, encoding)
+    const len = bytes.length
+    if (len === 0) {
+      throw new TypeError('The value "' + val +
+        '" is invalid for argument "value"')
+    }
+    for (i = 0; i < end - start; ++i) {
+      this[i + start] = bytes[i % len]
+    }
+  }
+
+  return this
+}
+
+// CUSTOM ERRORS
+// =============
+
+// Simplified versions from Node, changed for Buffer-only usage
+const errors = {}
+function E (sym, getMessage, Base) {
+  errors[sym] = class NodeError extends Base {
+    constructor () {
+      super()
+
+      Object.defineProperty(this, 'message', {
+        value: getMessage.apply(this, arguments),
+        writable: true,
+        configurable: true
+      })
+
+      // Add the error code to the name to include it in the stack trace.
+      this.name = `${this.name} [${sym}]`
+      // Access the stack to generate the error message including the error code
+      // from the name.
+      this.stack // eslint-disable-line no-unused-expressions
+      // Reset the name to the actual name.
+      delete this.name
+    }
+
+    get code () {
+      return sym
+    }
+
+    set code (value) {
+      Object.defineProperty(this, 'code', {
+        configurable: true,
+        enumerable: true,
+        value,
+        writable: true
+      })
+    }
+
+    toString () {
+      return `${this.name} [${sym}]: ${this.message}`
+    }
+  }
+}
+
+E('ERR_BUFFER_OUT_OF_BOUNDS',
+  function (name) {
+    if (name) {
+      return `${name} is outside of buffer bounds`
+    }
+
+    return 'Attempt to access memory outside buffer bounds'
+  }, RangeError)
+E('ERR_INVALID_ARG_TYPE',
+  function (name, actual) {
+    return `The "${name}" argument must be of type number. Received type ${typeof actual}`
+  }, TypeError)
+E('ERR_OUT_OF_RANGE',
+  function (str, range, input) {
+    let msg = `The value of "${str}" is out of range.`
+    let received = input
+    if (Number.isInteger(input) && Math.abs(input) > 2 ** 32) {
+      received = addNumericalSeparator(String(input))
+    } else if (typeof input === 'bigint') {
+      received = String(input)
+      if (input > BigInt(2) ** BigInt(32) || input < -(BigInt(2) ** BigInt(32))) {
+        received = addNumericalSeparator(received)
+      }
+      received += 'n'
+    }
+    msg += ` It must be ${range}. Received ${received}`
+    return msg
+  }, RangeError)
+
+function addNumericalSeparator (val) {
+  let res = ''
+  let i = val.length
+  const start = val[0] === '-' ? 1 : 0
+  for (; i >= start + 4; i -= 3) {
+    res = `_${val.slice(i - 3, i)}${res}`
+  }
+  return `${val.slice(0, i)}${res}`
+}
+
+// CHECK FUNCTIONS
+// ===============
+
+function checkBounds (buf, offset, byteLength) {
+  validateNumber(offset, 'offset')
+  if (buf[offset] === undefined || buf[offset + byteLength] === undefined) {
+    boundsError(offset, buf.length - (byteLength + 1))
+  }
+}
+
+function checkIntBI (value, min, max, buf, offset, byteLength) {
+  if (value > max || value < min) {
+    const n = typeof min === 'bigint' ? 'n' : ''
+    let range
+    if (byteLength > 3) {
+      if (min === 0 || min === BigInt(0)) {
+        range = `>= 0${n} and < 2${n} ** ${(byteLength + 1) * 8}${n}`
+      } else {
+        range = `>= -(2${n} ** ${(byteLength + 1) * 8 - 1}${n}) and < 2 ** ` +
+                `${(byteLength + 1) * 8 - 1}${n}`
+      }
+    } else {
+      range = `>= ${min}${n} and <= ${max}${n}`
+    }
+    throw new errors.ERR_OUT_OF_RANGE('value', range, value)
+  }
+  checkBounds(buf, offset, byteLength)
+}
+
+function validateNumber (value, name) {
+  if (typeof value !== 'number') {
+    throw new errors.ERR_INVALID_ARG_TYPE(name, 'number', value)
+  }
+}
+
+function boundsError (value, length, type) {
+  if (Math.floor(value) !== value) {
+    validateNumber(value, type)
+    throw new errors.ERR_OUT_OF_RANGE(type || 'offset', 'an integer', value)
+  }
+
+  if (length < 0) {
+    throw new errors.ERR_BUFFER_OUT_OF_BOUNDS()
+  }
+
+  throw new errors.ERR_OUT_OF_RANGE(type || 'offset',
+                                    `>= ${type ? 1 : 0} and <= ${length}`,
+                                    value)
+}
+
+// HELPER FUNCTIONS
+// ================
+
+const INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g
+
+function base64clean (str) {
+  // Node takes equal signs as end of the Base64 encoding
+  str = str.split('=')[0]
+  // Node strips out invalid characters like \n and \t from the string, base64-js does not
+  str = str.trim().replace(INVALID_BASE64_RE, '')
+  // Node converts strings with length < 2 to ''
+  if (str.length < 2) return ''
+  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
+  while (str.length % 4 !== 0) {
+    str = str + '='
+  }
+  return str
+}
+
+function utf8ToBytes (string, units) {
+  units = units || Infinity
+  let codePoint
+  const length = string.length
+  let leadSurrogate = null
+  const bytes = []
+
+  for (let i = 0; i < length; ++i) {
+    codePoint = string.charCodeAt(i)
+
+    // is surrogate component
+    if (codePoint > 0xD7FF && codePoint < 0xE000) {
+      // last char was a lead
+      if (!leadSurrogate) {
+        // no lead yet
+        if (codePoint > 0xDBFF) {
+          // unexpected trail
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        } else if (i + 1 === length) {
+          // unpaired lead
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        }
+
+        // valid lead
+        leadSurrogate = codePoint
+
+        continue
+      }
+
+      // 2 leads in a row
+      if (codePoint < 0xDC00) {
+        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+        leadSurrogate = codePoint
+        continue
+      }
+
+      // valid surrogate pair
+      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
+    } else if (leadSurrogate) {
+      // valid bmp char, but last char was a lead
+      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+    }
+
+    leadSurrogate = null
+
+    // encode utf8
+    if (codePoint < 0x80) {
+      if ((units -= 1) < 0) break
+      bytes.push(codePoint)
+    } else if (codePoint < 0x800) {
+      if ((units -= 2) < 0) break
+      bytes.push(
+        codePoint >> 0x6 | 0xC0,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x10000) {
+      if ((units -= 3) < 0) break
+      bytes.push(
+        codePoint >> 0xC | 0xE0,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x110000) {
+      if ((units -= 4) < 0) break
+      bytes.push(
+        codePoint >> 0x12 | 0xF0,
+        codePoint >> 0xC & 0x3F | 0x80,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else {
+      throw new Error('Invalid code point')
+    }
+  }
+
+  return bytes
+}
+
+function asciiToBytes (str) {
+  const byteArray = []
+  for (let i = 0; i < str.length; ++i) {
+    // Node's code seems to be doing this and not & 0x7F..
+    byteArray.push(str.charCodeAt(i) & 0xFF)
+  }
+  return byteArray
+}
+
+function utf16leToBytes (str, units) {
+  let c, hi, lo
+  const byteArray = []
+  for (let i = 0; i < str.length; ++i) {
+    if ((units -= 2) < 0) break
+
+    c = str.charCodeAt(i)
+    hi = c >> 8
+    lo = c % 256
+    byteArray.push(lo)
+    byteArray.push(hi)
+  }
+
+  return byteArray
+}
+
+function base64ToBytes (str) {
+  return base64.toByteArray(base64clean(str))
+}
+
+function blitBuffer (src, dst, offset, length) {
+  let i
+  for (i = 0; i < length; ++i) {
+    if ((i + offset >= dst.length) || (i >= src.length)) break
+    dst[i + offset] = src[i]
+  }
+  return i
+}
+
+// ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass
+// the `instanceof` check but they should be treated as of that type.
+// See: https://github.com/feross/buffer/issues/166
+function isInstance (obj, type) {
+  return obj instanceof type ||
+    (obj != null && obj.constructor != null && obj.constructor.name != null &&
+      obj.constructor.name === type.name)
+}
+function numberIsNaN (obj) {
+  // For IE11 support
+  return obj !== obj // eslint-disable-line no-self-compare
+}
+
+// Create lookup table for `toString('hex')`
+// See: https://github.com/feross/buffer/issues/219
+const hexSliceLookupTable = (function () {
+  const alphabet = '0123456789abcdef'
+  const table = new Array(256)
+  for (let i = 0; i < 16; ++i) {
+    const i16 = i * 16
+    for (let j = 0; j < 16; ++j) {
+      table[i16 + j] = alphabet[i] + alphabet[j]
+    }
+  }
+  return table
+})()
+
+// Return not function with Error if BigInt not supported
+function defineBigIntMethod (fn) {
+  return typeof BigInt === 'undefined' ? BufferBigIntNotDefined : fn
+}
+
+function BufferBigIntNotDefined () {
+  throw new Error('BigInt not supported')
+}
diff --git a/mqtt-backend/node_modules/bl/node_modules/buffer/package.json b/mqtt-backend/node_modules/bl/node_modules/buffer/package.json
new file mode 100644
index 0000000..ca1ad9a
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/node_modules/buffer/package.json
@@ -0,0 +1,93 @@
+{
+  "name": "buffer",
+  "description": "Node.js Buffer API, for the browser",
+  "version": "6.0.3",
+  "author": {
+    "name": "Feross Aboukhadijeh",
+    "email": "feross@feross.org",
+    "url": "https://feross.org"
+  },
+  "bugs": {
+    "url": "https://github.com/feross/buffer/issues"
+  },
+  "contributors": [
+    "Romain Beauxis <toots@rastageeks.org>",
+    "James Halliday <mail@substack.net>"
+  ],
+  "dependencies": {
+    "base64-js": "^1.3.1",
+    "ieee754": "^1.2.1"
+  },
+  "devDependencies": {
+    "airtap": "^3.0.0",
+    "benchmark": "^2.1.4",
+    "browserify": "^17.0.0",
+    "concat-stream": "^2.0.0",
+    "hyperquest": "^2.1.3",
+    "is-buffer": "^2.0.5",
+    "is-nan": "^1.3.0",
+    "split": "^1.0.1",
+    "standard": "*",
+    "tape": "^5.0.1",
+    "through2": "^4.0.2",
+    "uglify-js": "^3.11.5"
+  },
+  "homepage": "https://github.com/feross/buffer",
+  "jspm": {
+    "map": {
+      "./index.js": {
+        "node": "@node/buffer"
+      }
+    }
+  },
+  "keywords": [
+    "arraybuffer",
+    "browser",
+    "browserify",
+    "buffer",
+    "compatible",
+    "dataview",
+    "uint8array"
+  ],
+  "license": "MIT",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/feross/buffer.git"
+  },
+  "scripts": {
+    "perf": "browserify --debug perf/bracket-notation.js > perf/bundle.js && open perf/index.html",
+    "perf-node": "node perf/bracket-notation.js && node perf/concat.js && node perf/copy-big.js && node perf/copy.js && node perf/new-big.js && node perf/new.js && node perf/readDoubleBE.js && node perf/readFloatBE.js && node perf/readUInt32LE.js && node perf/slice.js && node perf/writeFloatBE.js",
+    "size": "browserify -r ./ | uglifyjs -c -m | gzip | wc -c",
+    "test": "standard && node ./bin/test.js",
+    "test-browser-old": "airtap -- test/*.js",
+    "test-browser-old-local": "airtap --local -- test/*.js",
+    "test-browser-new": "airtap -- test/*.js test/node/*.js",
+    "test-browser-new-local": "airtap --local -- test/*.js test/node/*.js",
+    "test-node": "tape test/*.js test/node/*.js",
+    "update-authors": "./bin/update-authors.sh"
+  },
+  "standard": {
+    "ignore": [
+      "test/node/**/*.js",
+      "test/common.js",
+      "test/_polyfill.js",
+      "perf/**/*.js"
+    ]
+  },
+  "funding": [
+    {
+      "type": "github",
+      "url": "https://github.com/sponsors/feross"
+    },
+    {
+      "type": "patreon",
+      "url": "https://www.patreon.com/feross"
+    },
+    {
+      "type": "consulting",
+      "url": "https://feross.org/support"
+    }
+  ]
+}
diff --git a/mqtt-backend/node_modules/bl/package.json b/mqtt-backend/node_modules/bl/package.json
new file mode 100644
index 0000000..1e745d6
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/package.json
@@ -0,0 +1,123 @@
+{
+  "name": "bl",
+  "version": "6.1.6",
+  "description": "Buffer List: collect buffers and access with a standard readable Buffer interface, streamable too!",
+  "license": "MIT",
+  "main": "bl.js",
+  "scripts": {
+    "lint": "standard *.js test/*.js",
+    "test": "npm run lint && npm run test:types && node test/test.js | faucet",
+    "test:ci": "npm run lint && node test/test.js && npm run test:types",
+    "test:types": "tsc --target esnext --moduleResolution node --allowJs --noEmit --skipLibCheck test/test.js",
+    "build": "true"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/rvagg/bl.git"
+  },
+  "homepage": "https://github.com/rvagg/bl",
+  "authors": [
+    "Rod Vagg <rod@vagg.org> (https://github.com/rvagg)",
+    "Matteo Collina <matteo.collina@gmail.com> (https://github.com/mcollina)",
+    "Jarett Cruger <jcrugzz@gmail.com> (https://github.com/jcrugzz)"
+  ],
+  "keywords": [
+    "buffer",
+    "buffers",
+    "stream",
+    "awesomesauce"
+  ],
+  "dependencies": {
+    "@types/readable-stream": "^4.0.0",
+    "buffer": "^6.0.3",
+    "inherits": "^2.0.4",
+    "readable-stream": "^4.2.0"
+  },
+  "devDependencies": {
+    "faucet": "~0.0.1",
+    "standard": "^17.0.0",
+    "tape": "^5.2.2",
+    "typescript": "~5.9.2"
+  },
+  "release": {
+    "branches": [
+      "master"
+    ],
+    "plugins": [
+      [
+        "@semantic-release/commit-analyzer",
+        {
+          "preset": "conventionalcommits",
+          "releaseRules": [
+            {
+              "breaking": true,
+              "release": "major"
+            },
+            {
+              "revert": true,
+              "release": "patch"
+            },
+            {
+              "type": "feat",
+              "release": "minor"
+            },
+            {
+              "type": "fix",
+              "release": "patch"
+            },
+            {
+              "type": "chore",
+              "release": "patch"
+            },
+            {
+              "type": "docs",
+              "release": "patch"
+            },
+            {
+              "type": "test",
+              "release": "patch"
+            },
+            {
+              "scope": "no-release",
+              "release": false
+            }
+          ]
+        }
+      ],
+      [
+        "@semantic-release/release-notes-generator",
+        {
+          "preset": "conventionalcommits",
+          "presetConfig": {
+            "types": [
+              {
+                "type": "feat",
+                "section": "Features"
+              },
+              {
+                "type": "fix",
+                "section": "Bug Fixes"
+              },
+              {
+                "type": "chore",
+                "section": "Trivial Changes"
+              },
+              {
+                "type": "docs",
+                "section": "Trivial Changes"
+              },
+              {
+                "type": "test",
+                "section": "Tests"
+              }
+            ]
+          }
+        }
+      ],
+      "@semantic-release/changelog",
+      "@semantic-release/npm",
+      "@semantic-release/github",
+      "@semantic-release/git"
+    ]
+  }
+}
diff --git a/mqtt-backend/node_modules/bl/test/convert.js b/mqtt-backend/node_modules/bl/test/convert.js
new file mode 100644
index 0000000..9f3e235
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/test/convert.js
@@ -0,0 +1,21 @@
+'use strict'
+
+const tape = require('tape')
+const { BufferList, BufferListStream } = require('../')
+const { Buffer } = require('buffer')
+
+tape('convert from BufferList to BufferListStream', (t) => {
+  const data = Buffer.from(`TEST-${Date.now()}`)
+  const bl = new BufferList(data)
+  const bls = new BufferListStream(bl)
+  t.ok(bl.slice().equals(bls.slice()))
+  t.end()
+})
+
+tape('convert from BufferListStream to BufferList', (t) => {
+  const data = Buffer.from(`TEST-${Date.now()}`)
+  const bls = new BufferListStream(data)
+  const bl = new BufferList(bls)
+  t.ok(bl.slice().equals(bls.slice()))
+  t.end()
+})
diff --git a/mqtt-backend/node_modules/bl/test/indexOf.js b/mqtt-backend/node_modules/bl/test/indexOf.js
new file mode 100644
index 0000000..62dcb01
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/test/indexOf.js
@@ -0,0 +1,492 @@
+'use strict'
+
+const tape = require('tape')
+const BufferList = require('../')
+const { Buffer } = require('buffer')
+
+tape('indexOf single byte needle', (t) => {
+  const bl = new BufferList(['abcdefg', 'abcdefg', '12345'])
+
+  t.equal(bl.indexOf('e'), 4)
+  t.equal(bl.indexOf('e', 5), 11)
+  t.equal(bl.indexOf('e', 12), -1)
+  t.equal(bl.indexOf('5'), 18)
+
+  t.end()
+})
+
+tape('indexOf multiple byte needle', (t) => {
+  const bl = new BufferList(['abcdefg', 'abcdefg'])
+
+  t.equal(bl.indexOf('ef'), 4)
+  t.equal(bl.indexOf('ef', 5), 11)
+
+  t.end()
+})
+
+tape('indexOf multiple byte needles across buffer boundaries', (t) => {
+  const bl = new BufferList(['abcdefg', 'abcdefg'])
+
+  t.equal(bl.indexOf('fgabc'), 5)
+
+  t.end()
+})
+
+tape('indexOf takes a Uint8Array search', (t) => {
+  const bl = new BufferList(['abcdefg', 'abcdefg'])
+  const search = new Uint8Array([102, 103, 97, 98, 99]) // fgabc
+
+  t.equal(bl.indexOf(search), 5)
+
+  t.end()
+})
+
+tape('indexOf takes a buffer list search', (t) => {
+  const bl = new BufferList(['abcdefg', 'abcdefg'])
+  const search = new BufferList('fgabc')
+
+  t.equal(bl.indexOf(search), 5)
+
+  t.end()
+})
+
+tape('indexOf a zero byte needle', (t) => {
+  const b = new BufferList('abcdef')
+  const bufEmpty = Buffer.from('')
+
+  t.equal(b.indexOf(''), 0)
+  t.equal(b.indexOf('', 1), 1)
+  t.equal(b.indexOf('', b.length + 1), b.length)
+  t.equal(b.indexOf('', Infinity), b.length)
+  t.equal(b.indexOf(bufEmpty), 0)
+  t.equal(b.indexOf(bufEmpty, 1), 1)
+  t.equal(b.indexOf(bufEmpty, b.length + 1), b.length)
+  t.equal(b.indexOf(bufEmpty, Infinity), b.length)
+
+  t.end()
+})
+
+tape('indexOf buffers smaller and larger than the needle', (t) => {
+  const bl = new BufferList(['abcdefg', 'a', 'bcdefg', 'a', 'bcfgab'])
+
+  t.equal(bl.indexOf('fgabc'), 5)
+  t.equal(bl.indexOf('fgabc', 6), 12)
+  t.equal(bl.indexOf('fgabc', 13), -1)
+
+  t.end()
+})
+
+// only present in node 6+
+;(process.version.substr(1).split('.')[0] >= 6) && tape('indexOf latin1 and binary encoding', (t) => {
+  const b = new BufferList('abcdef')
+
+  // test latin1 encoding
+  t.equal(
+    new BufferList(Buffer.from(b.toString('latin1'), 'latin1'))
+      .indexOf('d', 0, 'latin1'),
+    3
+  )
+  t.equal(
+    new BufferList(Buffer.from(b.toString('latin1'), 'latin1'))
+      .indexOf(Buffer.from('d', 'latin1'), 0, 'latin1'),
+    3
+  )
+  t.equal(
+    new BufferList(Buffer.from('aa\u00e8aa', 'latin1'))
+      .indexOf('\u00e8', 'latin1'),
+    2
+  )
+  t.equal(
+    new BufferList(Buffer.from('\u00e8', 'latin1'))
+      .indexOf('\u00e8', 'latin1'),
+    0
+  )
+  t.equal(
+    new BufferList(Buffer.from('\u00e8', 'latin1'))
+      .indexOf(Buffer.from('\u00e8', 'latin1'), 'latin1'),
+    0
+  )
+
+  // test binary encoding
+  t.equal(
+    new BufferList(Buffer.from(b.toString('binary'), 'binary'))
+      .indexOf('d', 0, 'binary'),
+    3
+  )
+  t.equal(
+    new BufferList(Buffer.from(b.toString('binary'), 'binary'))
+      .indexOf(Buffer.from('d', 'binary'), 0, 'binary'),
+    3
+  )
+  t.equal(
+    new BufferList(Buffer.from('aa\u00e8aa', 'binary'))
+      .indexOf('\u00e8', 'binary'),
+    2
+  )
+  t.equal(
+    new BufferList(Buffer.from('\u00e8', 'binary'))
+      .indexOf('\u00e8', 'binary'),
+    0
+  )
+  t.equal(
+    new BufferList(Buffer.from('\u00e8', 'binary'))
+      .indexOf(Buffer.from('\u00e8', 'binary'), 'binary'),
+    0
+  )
+
+  t.end()
+})
+
+tape('indexOf the entire nodejs10 buffer test suite', (t) => {
+  const b = new BufferList('abcdef')
+  const bufA = Buffer.from('a')
+  const bufBc = Buffer.from('bc')
+  const bufF = Buffer.from('f')
+  const bufZ = Buffer.from('z')
+
+  const stringComparison = 'abcdef'
+
+  t.equal(b.indexOf('a'), 0)
+  t.equal(b.indexOf('a', 1), -1)
+  t.equal(b.indexOf('a', -1), -1)
+  t.equal(b.indexOf('a', -4), -1)
+  t.equal(b.indexOf('a', -b.length), 0)
+  t.equal(b.indexOf('a', NaN), 0)
+  t.equal(b.indexOf('a', -Infinity), 0)
+  t.equal(b.indexOf('a', Infinity), -1)
+  t.equal(b.indexOf('bc'), 1)
+  t.equal(b.indexOf('bc', 2), -1)
+  t.equal(b.indexOf('bc', -1), -1)
+  t.equal(b.indexOf('bc', -3), -1)
+  t.equal(b.indexOf('bc', -5), 1)
+  t.equal(b.indexOf('bc', NaN), 1)
+  t.equal(b.indexOf('bc', -Infinity), 1)
+  t.equal(b.indexOf('bc', Infinity), -1)
+  t.equal(b.indexOf('f'), b.length - 1)
+  t.equal(b.indexOf('z'), -1)
+
+  // empty search tests
+  t.equal(b.indexOf(bufA), 0)
+  t.equal(b.indexOf(bufA, 1), -1)
+  t.equal(b.indexOf(bufA, -1), -1)
+  t.equal(b.indexOf(bufA, -4), -1)
+  t.equal(b.indexOf(bufA, -b.length), 0)
+  t.equal(b.indexOf(bufA, NaN), 0)
+  t.equal(b.indexOf(bufA, -Infinity), 0)
+  t.equal(b.indexOf(bufA, Infinity), -1)
+  t.equal(b.indexOf(bufBc), 1)
+  t.equal(b.indexOf(bufBc, 2), -1)
+  t.equal(b.indexOf(bufBc, -1), -1)
+  t.equal(b.indexOf(bufBc, -3), -1)
+  t.equal(b.indexOf(bufBc, -5), 1)
+  t.equal(b.indexOf(bufBc, NaN), 1)
+  t.equal(b.indexOf(bufBc, -Infinity), 1)
+  t.equal(b.indexOf(bufBc, Infinity), -1)
+  t.equal(b.indexOf(bufF), b.length - 1)
+  t.equal(b.indexOf(bufZ), -1)
+  t.equal(b.indexOf(0x61), 0)
+  t.equal(b.indexOf(0x61, 1), -1)
+  t.equal(b.indexOf(0x61, -1), -1)
+  t.equal(b.indexOf(0x61, -4), -1)
+  t.equal(b.indexOf(0x61, -b.length), 0)
+  t.equal(b.indexOf(0x61, NaN), 0)
+  t.equal(b.indexOf(0x61, -Infinity), 0)
+  t.equal(b.indexOf(0x61, Infinity), -1)
+  t.equal(b.indexOf(0x0), -1)
+
+  // test offsets
+  t.equal(b.indexOf('d', 2), 3)
+  t.equal(b.indexOf('f', 5), 5)
+  t.equal(b.indexOf('f', -1), 5)
+  t.equal(b.indexOf('f', 6), -1)
+
+  t.equal(b.indexOf(Buffer.from('d'), 2), 3)
+  t.equal(b.indexOf(Buffer.from('f'), 5), 5)
+  t.equal(b.indexOf(Buffer.from('f'), -1), 5)
+  t.equal(b.indexOf(Buffer.from('f'), 6), -1)
+
+  t.equal(Buffer.from('ff').indexOf(Buffer.from('f'), 1, 'ucs2'), -1)
+
+  // test invalid and uppercase encoding
+  t.equal(b.indexOf('b', 'utf8'), 1)
+  t.equal(b.indexOf('b', 'UTF8'), 1)
+  t.equal(b.indexOf('62', 'HEX'), 1)
+  t.throws(() => b.indexOf('bad', 'enc'), TypeError)
+
+  // test hex encoding
+  t.equal(
+    Buffer.from(b.toString('hex'), 'hex')
+      .indexOf('64', 0, 'hex'),
+    3
+  )
+  t.equal(
+    Buffer.from(b.toString('hex'), 'hex')
+      .indexOf(Buffer.from('64', 'hex'), 0, 'hex'),
+    3
+  )
+
+  // test base64 encoding
+  t.equal(
+    Buffer.from(b.toString('base64'), 'base64')
+      .indexOf('ZA==', 0, 'base64'),
+    3
+  )
+  t.equal(
+    Buffer.from(b.toString('base64'), 'base64')
+      .indexOf(Buffer.from('ZA==', 'base64'), 0, 'base64'),
+    3
+  )
+
+  // test ascii encoding
+  t.equal(
+    Buffer.from(b.toString('ascii'), 'ascii')
+      .indexOf('d', 0, 'ascii'),
+    3
+  )
+  t.equal(
+    Buffer.from(b.toString('ascii'), 'ascii')
+      .indexOf(Buffer.from('d', 'ascii'), 0, 'ascii'),
+    3
+  )
+
+  // test optional offset with passed encoding
+  t.equal(Buffer.from('aaaa0').indexOf('30', 'hex'), 4)
+  t.equal(Buffer.from('aaaa00a').indexOf('3030', 'hex'), 4)
+
+  {
+    // test usc2 encoding
+    const twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2')
+
+    t.equal(8, twoByteString.indexOf('\u0395', 4, 'ucs2'))
+    t.equal(6, twoByteString.indexOf('\u03a3', -4, 'ucs2'))
+    t.equal(4, twoByteString.indexOf('\u03a3', -6, 'ucs2'))
+    t.equal(4, twoByteString.indexOf(
+      Buffer.from('\u03a3', 'ucs2'), -6, 'ucs2'))
+    t.equal(-1, twoByteString.indexOf('\u03a3', -2, 'ucs2'))
+  }
+
+  const mixedByteStringUcs2 =
+      Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395', 'ucs2')
+
+  t.equal(6, mixedByteStringUcs2.indexOf('bc', 0, 'ucs2'))
+  t.equal(10, mixedByteStringUcs2.indexOf('\u03a3', 0, 'ucs2'))
+  t.equal(-1, mixedByteStringUcs2.indexOf('\u0396', 0, 'ucs2'))
+
+  t.equal(
+    6, mixedByteStringUcs2.indexOf(Buffer.from('bc', 'ucs2'), 0, 'ucs2'))
+  t.equal(
+    10, mixedByteStringUcs2.indexOf(Buffer.from('\u03a3', 'ucs2'), 0, 'ucs2'))
+  t.equal(
+    -1, mixedByteStringUcs2.indexOf(Buffer.from('\u0396', 'ucs2'), 0, 'ucs2'))
+
+  {
+    const twoByteString = Buffer.from('\u039a\u0391\u03a3\u03a3\u0395', 'ucs2')
+
+    // Test single char pattern
+    t.equal(0, twoByteString.indexOf('\u039a', 0, 'ucs2'))
+    let index = twoByteString.indexOf('\u0391', 0, 'ucs2')
+    t.equal(2, index, `Alpha - at index ${index}`)
+    index = twoByteString.indexOf('\u03a3', 0, 'ucs2')
+    t.equal(4, index, `First Sigma - at index ${index}`)
+    index = twoByteString.indexOf('\u03a3', 6, 'ucs2')
+    t.equal(6, index, `Second Sigma - at index ${index}`)
+    index = twoByteString.indexOf('\u0395', 0, 'ucs2')
+    t.equal(8, index, `Epsilon - at index ${index}`)
+    index = twoByteString.indexOf('\u0392', 0, 'ucs2')
+    t.equal(-1, index, `Not beta - at index ${index}`)
+
+    // Test multi-char pattern
+    index = twoByteString.indexOf('\u039a\u0391', 0, 'ucs2')
+    t.equal(0, index, `Lambda Alpha - at index ${index}`)
+    index = twoByteString.indexOf('\u0391\u03a3', 0, 'ucs2')
+    t.equal(2, index, `Alpha Sigma - at index ${index}`)
+    index = twoByteString.indexOf('\u03a3\u03a3', 0, 'ucs2')
+    t.equal(4, index, `Sigma Sigma - at index ${index}`)
+    index = twoByteString.indexOf('\u03a3\u0395', 0, 'ucs2')
+    t.equal(6, index, `Sigma Epsilon - at index ${index}`)
+  }
+
+  const mixedByteStringUtf8 = Buffer.from('\u039a\u0391abc\u03a3\u03a3\u0395')
+
+  t.equal(5, mixedByteStringUtf8.indexOf('bc'))
+  t.equal(5, mixedByteStringUtf8.indexOf('bc', 5))
+  t.equal(5, mixedByteStringUtf8.indexOf('bc', -8))
+  t.equal(7, mixedByteStringUtf8.indexOf('\u03a3'))
+  t.equal(-1, mixedByteStringUtf8.indexOf('\u0396'))
+
+  // Test complex string indexOf algorithms. Only trigger for long strings.
+  // Long string that isn't a simple repeat of a shorter string.
+  let longString = 'A'
+  for (let i = 66; i < 76; i++) { // from 'B' to 'K'
+    longString = longString + String.fromCharCode(i) + longString
+  }
+
+  const longBufferString = Buffer.from(longString)
+
+  // pattern of 15 chars, repeated every 16 chars in long
+  let pattern = 'ABACABADABACABA'
+  for (let i = 0; i < longBufferString.length - pattern.length; i += 7) {
+    const index = longBufferString.indexOf(pattern, i)
+    t.equal((i + 15) & ~0xf, index,
+      `Long ABACABA...-string at index ${i}`)
+  }
+
+  let index = longBufferString.indexOf('AJABACA')
+  t.equal(510, index, `Long AJABACA, First J - at index ${index}`)
+  index = longBufferString.indexOf('AJABACA', 511)
+  t.equal(1534, index, `Long AJABACA, Second J - at index ${index}`)
+
+  pattern = 'JABACABADABACABA'
+  index = longBufferString.indexOf(pattern)
+  t.equal(511, index, `Long JABACABA..., First J - at index ${index}`)
+  index = longBufferString.indexOf(pattern, 512)
+  t.equal(
+    1535, index, `Long JABACABA..., Second J - at index ${index}`)
+
+  // Search for a non-ASCII string in a pure ASCII string.
+  const asciiString = Buffer.from(
+    'somethingnotatallsinisterwhichalsoworks')
+  t.equal(-1, asciiString.indexOf('\x2061'))
+  t.equal(3, asciiString.indexOf('eth', 0))
+
+  // Search in string containing many non-ASCII chars.
+  const allCodePoints = []
+  for (let i = 0; i < 65536; i++) {
+    allCodePoints[i] = i
+  }
+
+  const allCharsString = String.fromCharCode.apply(String, allCodePoints)
+  const allCharsBufferUtf8 = Buffer.from(allCharsString)
+  const allCharsBufferUcs2 = Buffer.from(allCharsString, 'ucs2')
+
+  // Search for string long enough to trigger complex search with ASCII pattern
+  // and UC16 subject.
+  t.equal(-1, allCharsBufferUtf8.indexOf('notfound'))
+  t.equal(-1, allCharsBufferUcs2.indexOf('notfound'))
+
+  // Needle is longer than haystack, but only because it's encoded as UTF-16
+  t.equal(Buffer.from('aaaa').indexOf('a'.repeat(4), 'ucs2'), -1)
+
+  t.equal(Buffer.from('aaaa').indexOf('a'.repeat(4), 'utf8'), 0)
+  t.equal(Buffer.from('aaaa').indexOf('你好', 'ucs2'), -1)
+
+  // Haystack has odd length, but the needle is UCS2.
+  t.equal(Buffer.from('aaaaa').indexOf('b', 'ucs2'), -1)
+
+  {
+    // Find substrings in Utf8.
+    const lengths = [1, 3, 15] // Single char, simple and complex.
+    const indices = [0x5, 0x60, 0x400, 0x680, 0x7ee, 0xFF02, 0x16610, 0x2f77b]
+    for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
+      for (let i = 0; i < indices.length; i++) {
+        const index = indices[i]
+        let length = lengths[lengthIndex]
+
+        if (index + length > 0x7F) {
+          length = 2 * length
+        }
+
+        if (index + length > 0x7FF) {
+          length = 3 * length
+        }
+
+        if (index + length > 0xFFFF) {
+          length = 4 * length
+        }
+
+        const patternBufferUtf8 = allCharsBufferUtf8.slice(index, index + length)
+        t.equal(index, allCharsBufferUtf8.indexOf(patternBufferUtf8))
+
+        const patternStringUtf8 = patternBufferUtf8.toString()
+        t.equal(index, allCharsBufferUtf8.indexOf(patternStringUtf8))
+      }
+    }
+  }
+
+  {
+    // Find substrings in Usc2.
+    const lengths = [2, 4, 16] // Single char, simple and complex.
+    const indices = [0x5, 0x65, 0x105, 0x205, 0x285, 0x2005, 0x2085, 0xfff0]
+
+    for (let lengthIndex = 0; lengthIndex < lengths.length; lengthIndex++) {
+      for (let i = 0; i < indices.length; i++) {
+        const index = indices[i] * 2
+        const length = lengths[lengthIndex]
+
+        const patternBufferUcs2 =
+            allCharsBufferUcs2.slice(index, index + length)
+        t.equal(
+          index, allCharsBufferUcs2.indexOf(patternBufferUcs2, 0, 'ucs2'))
+
+        const patternStringUcs2 = patternBufferUcs2.toString('ucs2')
+        t.equal(
+          index, allCharsBufferUcs2.indexOf(patternStringUcs2, 0, 'ucs2'))
+      }
+    }
+  }
+
+  [
+    () => {},
+    {},
+    []
+  ].forEach((val) => {
+    t.throws(() => b.indexOf(val), TypeError, `"${JSON.stringify(val)}" should throw`)
+  })
+
+  // Test weird offset arguments.
+  // The following offsets coerce to NaN or 0, searching the whole Buffer
+  t.equal(b.indexOf('b', undefined), 1)
+  t.equal(b.indexOf('b', {}), 1)
+  t.equal(b.indexOf('b', 0), 1)
+  t.equal(b.indexOf('b', null), 1)
+  t.equal(b.indexOf('b', []), 1)
+
+  // The following offset coerces to 2, in other words +[2] === 2
+  t.equal(b.indexOf('b', [2]), -1)
+
+  // Behavior should match String.indexOf()
+  t.equal(
+    b.indexOf('b', undefined),
+    stringComparison.indexOf('b', undefined))
+  t.equal(
+    b.indexOf('b', {}),
+    stringComparison.indexOf('b', {}))
+  t.equal(
+    b.indexOf('b', 0),
+    stringComparison.indexOf('b', 0))
+  t.equal(
+    b.indexOf('b', null),
+    stringComparison.indexOf('b', null))
+  t.equal(
+    b.indexOf('b', []),
+    stringComparison.indexOf('b', []))
+  t.equal(
+    b.indexOf('b', [2]),
+    stringComparison.indexOf('b', [2]))
+
+  // test truncation of Number arguments to uint8
+  {
+    const buf = Buffer.from('this is a test')
+
+    t.equal(buf.indexOf(0x6973), 3)
+    t.equal(buf.indexOf(0x697320), 4)
+    t.equal(buf.indexOf(0x69732069), 2)
+    t.equal(buf.indexOf(0x697374657374), 0)
+    t.equal(buf.indexOf(0x69737374), 0)
+    t.equal(buf.indexOf(0x69737465), 11)
+    t.equal(buf.indexOf(0x69737465), 11)
+    t.equal(buf.indexOf(-140), 0)
+    t.equal(buf.indexOf(-152), 1)
+    t.equal(buf.indexOf(0xff), -1)
+    t.equal(buf.indexOf(0xffff), -1)
+  }
+
+  // Test that Uint8Array arguments are okay.
+  {
+    const needle = new Uint8Array([0x66, 0x6f, 0x6f])
+    const haystack = new BufferList(Buffer.from('a foo b foo'))
+    t.equal(haystack.indexOf(needle), 2)
+  }
+
+  t.end()
+})
diff --git a/mqtt-backend/node_modules/bl/test/isBufferList.js b/mqtt-backend/node_modules/bl/test/isBufferList.js
new file mode 100644
index 0000000..9d895d5
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/test/isBufferList.js
@@ -0,0 +1,32 @@
+'use strict'
+
+const tape = require('tape')
+const { BufferList, BufferListStream } = require('../')
+const { Buffer } = require('buffer')
+
+tape('isBufferList positives', (t) => {
+  t.ok(BufferList.isBufferList(new BufferList()))
+  t.ok(BufferList.isBufferList(new BufferListStream()))
+
+  t.end()
+})
+
+tape('isBufferList negatives', (t) => {
+  const types = [
+    null,
+    undefined,
+    NaN,
+    true,
+    false,
+    {},
+    [],
+    Buffer.alloc(0),
+    [Buffer.alloc(0)]
+  ]
+
+  for (const obj of types) {
+    t.notOk(BufferList.isBufferList(obj))
+  }
+
+  t.end()
+})
diff --git a/mqtt-backend/node_modules/bl/test/test.js b/mqtt-backend/node_modules/bl/test/test.js
new file mode 100644
index 0000000..f10326f
--- /dev/null
+++ b/mqtt-backend/node_modules/bl/test/test.js
@@ -0,0 +1,1032 @@
+// @ts-check
+'use strict'
+
+const tape = require('tape')
+const crypto = require('crypto')
+const fs = require('fs')
+const path = require('path')
+const os = require('os')
+const BufferListStream = require('../')
+const { Buffer } = require('buffer')
+
+/**
+ * This typedef allows us to add _bufs to the API without declaring it publicly on types.
+ * @typedef { BufferListStream & { _bufs?: Buffer[] }} BufferListStreamWithPrivate
+ */
+
+/**
+ * Just for typechecking in js
+ * @type { NodeJS.Process & { browser?: boolean }}
+ */
+
+const process = globalThis.process
+
+/** @type {BufferEncoding[]} */
+const encodings = ['ascii', 'utf8', 'utf-8', 'hex', 'binary', 'base64']
+
+if (process.browser) {
+  encodings.push(
+    'ucs2',
+    'ucs-2',
+    'utf16le',
+    /**
+     * This alias is not in typescript typings for BufferEncoding. Still have to fix
+     * @see https://nodejs.org/api/buffer.html#buffers-and-character-encodings
+     */
+    // @ts-ignore
+    'utf-16le'
+  )
+}
+
+require('./indexOf')
+require('./isBufferList')
+require('./convert')
+
+tape('single bytes from single buffer', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(Buffer.from('abcd'))
+
+  t.equal(bl.length, 4)
+  t.equal(bl.get(-1), undefined)
+  t.equal(bl.get(0), 97)
+  t.equal(bl.get(1), 98)
+  t.equal(bl.get(2), 99)
+  t.equal(bl.get(3), 100)
+  t.equal(bl.get(4), undefined)
+
+  t.end()
+})
+
+tape('single bytes from multiple buffers', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(Buffer.from('abcd'))
+  bl.append(Buffer.from('efg'))
+  bl.append(Buffer.from('hi'))
+  bl.append(Buffer.from('j'))
+
+  t.equal(bl.length, 10)
+
+  t.equal(bl.get(0), 97)
+  t.equal(bl.get(1), 98)
+  t.equal(bl.get(2), 99)
+  t.equal(bl.get(3), 100)
+  t.equal(bl.get(4), 101)
+  t.equal(bl.get(5), 102)
+  t.equal(bl.get(6), 103)
+  t.equal(bl.get(7), 104)
+  t.equal(bl.get(8), 105)
+  t.equal(bl.get(9), 106)
+
+  t.end()
+})
+
+tape('multi bytes from single buffer', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(Buffer.from('abcd'))
+
+  t.equal(bl.length, 4)
+
+  t.equal(bl.slice(0, 4).toString('ascii'), 'abcd')
+  t.equal(bl.slice(0, 3).toString('ascii'), 'abc')
+  t.equal(bl.slice(1, 4).toString('ascii'), 'bcd')
+  t.equal(bl.slice(-4, -1).toString('ascii'), 'abc')
+
+  t.end()
+})
+
+tape('multi bytes from single buffer (negative indexes)', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(Buffer.from('buffer'))
+
+  t.equal(bl.length, 6)
+
+  t.equal(bl.slice(-6, -1).toString('ascii'), 'buffe')
+  t.equal(bl.slice(-6, -2).toString('ascii'), 'buff')
+  t.equal(bl.slice(-5, -2).toString('ascii'), 'uff')
+
+  t.end()
+})
+
+tape('multiple bytes from multiple buffers', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(Buffer.from('abcd'))
+  bl.append(Buffer.from('efg'))
+  bl.append(Buffer.from('hi'))
+  bl.append(Buffer.from('j'))
+
+  t.equal(bl.length, 10)
+
+  t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+  t.equal(bl.slice(3, 10).toString('ascii'), 'defghij')
+  t.equal(bl.slice(3, 6).toString('ascii'), 'def')
+  t.equal(bl.slice(3, 8).toString('ascii'), 'defgh')
+  t.equal(bl.slice(5, 10).toString('ascii'), 'fghij')
+  t.equal(bl.slice(-7, -4).toString('ascii'), 'def')
+
+  t.end()
+})
+
+tape('multiple bytes from multiple buffer lists', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(new BufferListStream([Buffer.from('abcd'), Buffer.from('efg')]))
+  bl.append(new BufferListStream([Buffer.from('hi'), Buffer.from('j')]))
+
+  t.equal(bl.length, 10)
+
+  t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+
+  t.equal(bl.slice(3, 10).toString('ascii'), 'defghij')
+  t.equal(bl.slice(3, 6).toString('ascii'), 'def')
+  t.equal(bl.slice(3, 8).toString('ascii'), 'defgh')
+  t.equal(bl.slice(5, 10).toString('ascii'), 'fghij')
+
+  t.end()
+})
+
+// same data as previous test, just using nested constructors
+tape('multiple bytes from crazy nested buffer lists', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(
+    new BufferListStream([
+      new BufferListStream([
+        new BufferListStream(Buffer.from('abc')),
+        Buffer.from('d'),
+        new BufferListStream(Buffer.from('efg'))
+      ]),
+      new BufferListStream([Buffer.from('hi')]),
+      new BufferListStream(Buffer.from('j'))
+    ])
+  )
+
+  t.equal(bl.length, 10)
+
+  t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+
+  t.equal(bl.slice(3, 10).toString('ascii'), 'defghij')
+  t.equal(bl.slice(3, 6).toString('ascii'), 'def')
+  t.equal(bl.slice(3, 8).toString('ascii'), 'defgh')
+  t.equal(bl.slice(5, 10).toString('ascii'), 'fghij')
+
+  t.end()
+})
+
+tape('append accepts arrays of Buffers', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(Buffer.from('abc'))
+  bl.append([Buffer.from('def')])
+  bl.append([Buffer.from('ghi'), Buffer.from('jkl')])
+  bl.append([Buffer.from('mnop'), Buffer.from('qrstu'), Buffer.from('vwxyz')])
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+  t.end()
+})
+
+tape('append accepts arrays of Uint8Arrays', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(new Uint8Array([97, 98, 99]))
+  bl.append([Uint8Array.from([100, 101, 102])])
+  bl.append([new Uint8Array([103, 104, 105]), new Uint8Array([106, 107, 108])])
+  bl.append([new Uint8Array([109, 110, 111, 112]), new Uint8Array([113, 114, 115, 116, 117]), new Uint8Array([118, 119, 120, 121, 122])])
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+  t.end()
+})
+
+tape('append accepts arrays of BufferLists', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(Buffer.from('abc'))
+  bl.append([new BufferListStream('def')])
+  bl.append(
+    new BufferListStream([Buffer.from('ghi'), new BufferListStream('jkl')])
+  )
+  bl.append([
+    Buffer.from('mnop'),
+    new BufferListStream([Buffer.from('qrstu'), Buffer.from('vwxyz')])
+  ])
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+  t.end()
+})
+
+tape('append chainable', function (t) {
+  const bl = new BufferListStream()
+
+  t.ok(bl.append(Buffer.from('abcd')) === bl)
+  t.ok(bl.append([Buffer.from('abcd')]) === bl)
+  t.ok(bl.append(new BufferListStream(Buffer.from('abcd'))) === bl)
+  t.ok(bl.append([new BufferListStream(Buffer.from('abcd'))]) === bl)
+
+  t.end()
+})
+
+tape('append chainable (test results)', function (t) {
+  const bl = new BufferListStream('abc')
+    .append([new BufferListStream('def')])
+    .append(
+      new BufferListStream([Buffer.from('ghi'), new BufferListStream('jkl')])
+    )
+    .append([
+      Buffer.from('mnop'),
+      new BufferListStream([Buffer.from('qrstu'), Buffer.from('vwxyz')])
+    ])
+
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'abcdefghijklmnopqrstuvwxyz')
+
+  t.end()
+})
+
+tape('prepend accepts arrays of Buffers', function (t) {
+  const bl = new BufferListStream()
+
+  bl.prepend(Buffer.from('abc'))
+  bl.prepend([Buffer.from('def')])
+  bl.prepend([Buffer.from('ghi'), Buffer.from('jkl')])
+  bl.prepend([Buffer.from('mnop'), Buffer.from('qrstu'), Buffer.from('vwxyz')])
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'mnopqrstuvwxyzghijkldefabc')
+
+  t.end()
+})
+
+tape('prepend accepts arrays of Uint8Arrays', function (t) {
+  const bl = new BufferListStream()
+
+  bl.prepend(new Uint8Array([97, 98, 99]))
+  bl.prepend([Uint8Array.from([100, 101, 102])])
+  bl.prepend([new Uint8Array([103, 104, 105]), new Uint8Array([106, 107, 108])])
+  bl.prepend([new Uint8Array([109, 110, 111, 112]), new Uint8Array([113, 114, 115, 116, 117]), new Uint8Array([118, 119, 120, 121, 122])])
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'mnopqrstuvwxyzghijkldefabc')
+
+  t.end()
+})
+
+tape('prepend accepts arrays of BufferLists', function (t) {
+  const bl = new BufferListStream()
+
+  bl.prepend(Buffer.from('abc'))
+  bl.prepend([new BufferListStream('def')])
+  bl.prepend(
+    new BufferListStream([Buffer.from('ghi'), new BufferListStream('jkl')])
+  )
+  bl.prepend([
+    Buffer.from('mnop'),
+    new BufferListStream([Buffer.from('qrstu'), Buffer.from('vwxyz')])
+  ])
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'mnopqrstuvwxyzghijkldefabc')
+
+  t.end()
+})
+
+tape('prepend chainable', function (t) {
+  const bl = new BufferListStream()
+
+  t.ok(bl.prepend(Buffer.from('abcd')) === bl)
+  t.ok(bl.prepend([Buffer.from('abcd')]) === bl)
+  t.ok(bl.prepend(new BufferListStream(Buffer.from('abcd'))) === bl)
+  t.ok(bl.prepend([new BufferListStream(Buffer.from('abcd'))]) === bl)
+
+  t.end()
+})
+
+tape('prepend chainable (test results)', function (t) {
+  const bl = new BufferListStream('abc')
+    .prepend([new BufferListStream('def')])
+    .prepend(
+      new BufferListStream([Buffer.from('ghi'), new BufferListStream('jkl')])
+    )
+    .prepend([
+      Buffer.from('mnop'),
+      new BufferListStream([Buffer.from('qrstu'), Buffer.from('vwxyz')])
+    ])
+
+  t.equal(bl.length, 26)
+  t.equal(bl.slice().toString('ascii'), 'mnopqrstuvwxyzghijkldefabc')
+
+  t.end()
+})
+
+tape('consuming from multiple buffers', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(Buffer.from('abcd'))
+  bl.append(Buffer.from('efg'))
+  bl.append(Buffer.from('hi'))
+  bl.append(Buffer.from('j'))
+
+  t.equal(bl.length, 10)
+
+  t.equal(bl.slice(0, 10).toString('ascii'), 'abcdefghij')
+
+  bl.consume(3)
+  t.equal(bl.length, 7)
+  t.equal(bl.slice(0, 7).toString('ascii'), 'defghij')
+
+  bl.consume(2)
+  t.equal(bl.length, 5)
+  t.equal(bl.slice(0, 5).toString('ascii'), 'fghij')
+
+  bl.consume(1)
+  t.equal(bl.length, 4)
+  t.equal(bl.slice(0, 4).toString('ascii'), 'ghij')
+
+  bl.consume(1)
+  t.equal(bl.length, 3)
+  t.equal(bl.slice(0, 3).toString('ascii'), 'hij')
+
+  bl.consume(2)
+  t.equal(bl.length, 1)
+  t.equal(bl.slice(0, 1).toString('ascii'), 'j')
+
+  t.end()
+})
+
+tape('complete consumption', function (t) {
+  /** @type {BufferListStreamWithPrivate} */
+  const bl = new BufferListStream()
+
+  bl.append(Buffer.from('a'))
+  bl.append(Buffer.from('b'))
+
+  bl.consume(2)
+
+  t.equal(bl.length, 0)
+  t.equal(bl._bufs.length, 0)
+
+  t.end()
+})
+
+tape('test readUInt8 / readInt8', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(3)
+  const bl = new BufferListStream()
+
+  buf1[0] = 0x1
+  buf2[1] = 0x3
+  buf2[2] = 0x4
+  buf3[0] = 0x23
+  buf3[1] = 0x42
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  t.equal(bl.readUInt8(), 0x1)
+  t.equal(bl.readUInt8(2), 0x3)
+  t.equal(bl.readInt8(2), 0x3)
+  t.equal(bl.readUInt8(3), 0x4)
+  t.equal(bl.readInt8(3), 0x4)
+  t.equal(bl.readUInt8(4), 0x23)
+  t.equal(bl.readInt8(4), 0x23)
+  t.equal(bl.readUInt8(5), 0x42)
+  t.equal(bl.readInt8(5), 0x42)
+
+  t.end()
+})
+
+tape('test readUInt16LE / readUInt16BE / readInt16LE / readInt16BE', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(3)
+  const bl = new BufferListStream()
+
+  buf1[0] = 0x1
+  buf2[1] = 0x3
+  buf2[2] = 0x4
+  buf3[0] = 0x23
+  buf3[1] = 0x42
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  t.equal(bl.readUInt16BE(), 0x0100)
+  t.equal(bl.readUInt16LE(), 0x0001)
+  t.equal(bl.readUInt16BE(2), 0x0304)
+  t.equal(bl.readUInt16LE(2), 0x0403)
+  t.equal(bl.readInt16BE(2), 0x0304)
+  t.equal(bl.readInt16LE(2), 0x0403)
+  t.equal(bl.readUInt16BE(3), 0x0423)
+  t.equal(bl.readUInt16LE(3), 0x2304)
+  t.equal(bl.readInt16BE(3), 0x0423)
+  t.equal(bl.readInt16LE(3), 0x2304)
+  t.equal(bl.readUInt16BE(4), 0x2342)
+  t.equal(bl.readUInt16LE(4), 0x4223)
+  t.equal(bl.readInt16BE(4), 0x2342)
+  t.equal(bl.readInt16LE(4), 0x4223)
+
+  t.end()
+})
+
+tape('test readUInt32LE / readUInt32BE / readInt32LE / readInt32BE', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(3)
+  const bl = new BufferListStream()
+
+  buf1[0] = 0x1
+  buf2[1] = 0x3
+  buf2[2] = 0x4
+  buf3[0] = 0x23
+  buf3[1] = 0x42
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  t.equal(bl.readUInt32BE(), 0x01000304)
+  t.equal(bl.readUInt32LE(), 0x04030001)
+  t.equal(bl.readUInt32BE(2), 0x03042342)
+  t.equal(bl.readUInt32LE(2), 0x42230403)
+  t.equal(bl.readInt32BE(2), 0x03042342)
+  t.equal(bl.readInt32LE(2), 0x42230403)
+
+  t.end()
+})
+
+tape('test readBigUInt64LE / readBigUInt64BE / readBigInt64LE / readBigInt64BE', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(2)
+  const buf4 = Buffer.alloc(5)
+  const bl = new BufferListStream()
+
+  buf1[0] = 0x05
+  buf2[0] = 0x07
+
+  buf2[1] = 0x03
+  buf2[2] = 0x04
+  buf3[0] = 0x23
+  buf3[1] = 0x42
+  buf4[0] = 0x00
+  buf4[1] = 0x01
+  buf4[2] = 0x02
+  buf4[3] = 0x03
+
+  buf4[4] = 0x04
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+  bl.append(buf4)
+
+  t.equal(bl.readBigUInt64BE(2), 0x0304234200010203n)
+  t.equal(bl.readBigUInt64LE(2), 0x0302010042230403n)
+  t.equal(bl.readBigInt64BE(2), 0x0304234200010203n)
+  t.equal(bl.readBigInt64LE(2), 0x0302010042230403n)
+
+  t.end()
+})
+
+tape('test readUIntLE / readUIntBE / readIntLE / readIntBE', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(3)
+  const bl = new BufferListStream()
+
+  buf2[0] = 0x2
+  buf2[1] = 0x3
+  buf2[2] = 0x4
+  buf3[0] = 0x23
+  buf3[1] = 0x42
+  buf3[2] = 0x61
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  t.equal(bl.readUIntBE(1, 1), 0x02)
+  t.equal(bl.readUIntBE(1, 2), 0x0203)
+  t.equal(bl.readUIntBE(1, 3), 0x020304)
+  t.equal(bl.readUIntBE(1, 4), 0x02030423)
+  t.equal(bl.readUIntBE(1, 5), 0x0203042342)
+  t.equal(bl.readUIntBE(1, 6), 0x020304234261)
+  t.equal(bl.readUIntLE(1, 1), 0x02)
+  t.equal(bl.readUIntLE(1, 2), 0x0302)
+  t.equal(bl.readUIntLE(1, 3), 0x040302)
+  t.equal(bl.readUIntLE(1, 4), 0x23040302)
+  t.equal(bl.readUIntLE(1, 5), 0x4223040302)
+  t.equal(bl.readUIntLE(1, 6), 0x614223040302)
+  t.equal(bl.readIntBE(1, 1), 0x02)
+  t.equal(bl.readIntBE(1, 2), 0x0203)
+  t.equal(bl.readIntBE(1, 3), 0x020304)
+  t.equal(bl.readIntBE(1, 4), 0x02030423)
+  t.equal(bl.readIntBE(1, 5), 0x0203042342)
+  t.equal(bl.readIntBE(1, 6), 0x020304234261)
+  t.equal(bl.readIntLE(1, 1), 0x02)
+  t.equal(bl.readIntLE(1, 2), 0x0302)
+  t.equal(bl.readIntLE(1, 3), 0x040302)
+  t.equal(bl.readIntLE(1, 4), 0x23040302)
+  t.equal(bl.readIntLE(1, 5), 0x4223040302)
+  t.equal(bl.readIntLE(1, 6), 0x614223040302)
+
+  t.end()
+})
+
+tape('test readFloatLE / readFloatBE', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(3)
+  const bl = new BufferListStream()
+
+  buf1[0] = 0x01
+  buf2[1] = 0x00
+  buf2[2] = 0x00
+  buf3[0] = 0x80
+  buf3[1] = 0x3f
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  const canonical = Buffer.concat([buf1, buf2, buf3])
+  t.equal(bl.readFloatLE(), canonical.readFloatLE())
+  t.equal(bl.readFloatBE(), canonical.readFloatBE())
+  t.equal(bl.readFloatLE(2), canonical.readFloatLE(2))
+  t.equal(bl.readFloatBE(2), canonical.readFloatBE(2))
+
+  t.end()
+})
+
+tape('test readDoubleLE / readDoubleBE', function (t) {
+  const buf1 = Buffer.alloc(1)
+  const buf2 = Buffer.alloc(3)
+  const buf3 = Buffer.alloc(10)
+  const bl = new BufferListStream()
+
+  buf1[0] = 0x01
+  buf2[1] = 0x55
+  buf2[2] = 0x55
+  buf3[0] = 0x55
+  buf3[1] = 0x55
+  buf3[2] = 0x55
+  buf3[3] = 0x55
+  buf3[4] = 0xd5
+  buf3[5] = 0x3f
+
+  bl.append(buf1)
+  bl.append(buf2)
+  bl.append(buf3)
+
+  const canonical = Buffer.concat([buf1, buf2, buf3])
+  t.equal(bl.readDoubleBE(), canonical.readDoubleBE())
+  t.equal(bl.readDoubleLE(), canonical.readDoubleLE())
+  t.equal(bl.readDoubleBE(2), canonical.readDoubleBE(2))
+  t.equal(bl.readDoubleLE(2), canonical.readDoubleLE(2))
+
+  t.end()
+})
+
+tape('test toString', function (t) {
+  const bl = new BufferListStream()
+
+  bl.append(Buffer.from('abcd'))
+  bl.append(Buffer.from('efg'))
+  bl.append(Buffer.from('hi'))
+  bl.append(Buffer.from('j'))
+
+  t.equal(bl.toString('ascii', 0, 10), 'abcdefghij')
+  t.equal(bl.toString('ascii', 3, 10), 'defghij')
+  t.equal(bl.toString('ascii', 3, 6), 'def')
+  t.equal(bl.toString('ascii', 3, 8), 'defgh')
+  t.equal(bl.toString('ascii', 5, 10), 'fghij')
+
+  t.end()
+})
+
+tape('test toString encoding', function (t) {
+  const bl = new BufferListStream()
+  const b = Buffer.from('abcdefghij\xff\x00')
+
+  bl.append(Buffer.from('abcd'))
+  bl.append(Buffer.from('efg'))
+  bl.append(Buffer.from('hi'))
+  bl.append(Buffer.from('j'))
+  bl.append(Buffer.from('\xff\x00'))
+
+  encodings.forEach(function (enc) {
+    t.equal(bl.toString(enc), b.toString(enc), enc)
+  })
+
+  t.end()
+})
+
+tape('getBuffers', function (t) {
+  const bl = new BufferListStream([Buffer.from('First'), Buffer.from('Second'), Buffer.from('Third')])
+
+  t.deepEquals(
+    bl.getBuffers(),
+    // @ts-ignore
+    bl._bufs
+  )
+
+  t.end()
+})
+
+tape('uninitialized memory', function (t) {
+  const secret = crypto.randomBytes(256)
+  for (let i = 0; i < 1e6; i++) {
+    const clone = Buffer.from(secret)
+    const bl = new BufferListStream()
+    bl.append(Buffer.from('a'))
+    bl.consume(-1024)
+    const buf = bl.slice(1)
+    if (buf.indexOf(clone) !== -1) {
+      t.fail(`Match (at ${i})`)
+      break
+    }
+  }
+  t.end()
+})
+
+!process.browser && tape('test stream', function (t) {
+  const random = crypto.randomBytes(65534)
+
+  const bl = new BufferListStream((err, buf) => {
+    t.ok(Buffer.isBuffer(buf))
+    t.ok(err === null)
+    t.ok(random.equals(bl.slice()))
+    t.ok(random.equals(buf.slice()))
+
+    bl.pipe(fs.createWriteStream(path.join(os.tmpdir(), 'bl_test_rnd_out.dat')))
+      .on('close', function () {
+        const rndhash = crypto.createHash('md5').update(random).digest('hex')
+        const md5sum = crypto.createHash('md5')
+        const s = fs.createReadStream(path.join(os.tmpdir(), 'bl_test_rnd_out.dat'))
+
+        s.on('data', md5sum.update.bind(md5sum))
+        s.on('end', function () {
+          t.equal(rndhash, md5sum.digest('hex'), 'woohoo! correct hash!')
+          t.end()
+        })
+      })
+  })
+
+  fs.writeFileSync(path.join(os.tmpdir(), 'bl_test_rnd.dat'), random)
+  fs.createReadStream(path.join(os.tmpdir(), 'bl_test_rnd.dat')).pipe(bl)
+})
+
+tape('instantiation with Buffer', function (t) {
+  const buf = crypto.randomBytes(1024)
+  const buf2 = crypto.randomBytes(1024)
+  let b = BufferListStream(buf)
+
+  t.equal(buf.toString('hex'), b.slice().toString('hex'), 'same buffer')
+  b = BufferListStream([buf, buf2])
+  t.equal(b.slice().toString('hex'), Buffer.concat([buf, buf2]).toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('test String appendage', function (t) {
+  const bl = new BufferListStream()
+  const b = Buffer.from('abcdefghij\xff\x00')
+
+  bl.append('abcd')
+  bl.append('efg')
+  bl.append('hi')
+  bl.append('j')
+  bl.append('\xff\x00')
+
+  encodings.forEach(function (enc) {
+    t.equal(bl.toString(enc), b.toString(enc))
+  })
+
+  t.end()
+})
+
+tape('test Number appendage', function (t) {
+  const bl = new BufferListStream()
+  const b = Buffer.from('1234567890')
+
+  bl.append(1234)
+  bl.append(567)
+  bl.append(89)
+  bl.append(0)
+
+  encodings.forEach(function (enc) {
+    t.equal(bl.toString(enc), b.toString(enc))
+  })
+
+  t.end()
+})
+
+tape('write nothing, should get empty buffer', function (t) {
+  t.plan(3)
+  BufferListStream(function (err, data) {
+    t.notOk(err, 'no error')
+    t.ok(Buffer.isBuffer(data), 'got a buffer')
+    t.equal(0, data.length, 'got a zero-length buffer')
+    t.end()
+  }).end()
+})
+
+tape('unicode string', function (t) {
+  t.plan(2)
+
+  const inp1 = '\u2600'
+  const inp2 = '\u2603'
+  const exp = inp1 + ' and ' + inp2
+  const bl = BufferListStream()
+
+  bl.write(inp1)
+  bl.write(' and ')
+  bl.write(inp2)
+  t.equal(exp, bl.toString())
+  t.equal(Buffer.from(exp).toString('hex'), bl.toString('hex'))
+})
+
+tape('should emit finish', function (t) {
+  const source = BufferListStream()
+  const dest = BufferListStream()
+
+  source.write('hello')
+  source.pipe(dest)
+
+  dest.on('finish', function () {
+    t.equal(dest.toString('utf8'), 'hello')
+    t.end()
+  })
+})
+
+tape('basic copy', function (t) {
+  const buf = crypto.randomBytes(1024)
+  const buf2 = Buffer.alloc(1024)
+  const b = BufferListStream(buf)
+
+  b.copy(buf2)
+  t.equal(b.slice().toString('hex'), buf2.toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('copy after many appends', function (t) {
+  const buf = crypto.randomBytes(512)
+  const buf2 = Buffer.alloc(1024)
+  const b = BufferListStream(buf)
+
+  b.append(buf)
+  b.copy(buf2)
+  t.equal(b.slice().toString('hex'), buf2.toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('copy at a precise position', function (t) {
+  const buf = crypto.randomBytes(1004)
+  const buf2 = Buffer.alloc(1024)
+  const b = BufferListStream(buf)
+
+  b.copy(buf2, 20)
+  t.equal(b.slice().toString('hex'), buf2.slice(20).toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('copy starting from a precise location', function (t) {
+  const buf = crypto.randomBytes(10)
+  const buf2 = Buffer.alloc(5)
+  const b = BufferListStream(buf)
+
+  b.copy(buf2, 0, 5)
+  t.equal(b.slice(5).toString('hex'), buf2.toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('copy in an interval', function (t) {
+  const rnd = crypto.randomBytes(10)
+  const b = BufferListStream(rnd) // put the random bytes there
+  const actual = Buffer.alloc(3)
+  const expected = Buffer.alloc(3)
+
+  rnd.copy(expected, 0, 5, 8)
+  b.copy(actual, 0, 5, 8)
+
+  t.equal(actual.toString('hex'), expected.toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('copy an interval between two buffers', function (t) {
+  const buf = crypto.randomBytes(10)
+  const buf2 = Buffer.alloc(10)
+  const b = BufferListStream(buf)
+
+  b.append(buf)
+  b.copy(buf2, 0, 5, 15)
+
+  t.equal(b.slice(5, 15).toString('hex'), buf2.toString('hex'), 'same buffer')
+
+  t.end()
+})
+
+tape('shallow slice across buffer boundaries', function (t) {
+  const bl = new BufferListStream(['First', 'Second', 'Third'])
+
+  t.equal(bl.shallowSlice(3, 13).toString(), 'stSecondTh')
+
+  t.end()
+})
+
+tape('shallow slice within single buffer', function (t) {
+  t.plan(2)
+
+  const bl = new BufferListStream(['First', 'Second', 'Third'])
+
+  t.equal(bl.shallowSlice(5, 10).toString(), 'Secon')
+  t.equal(bl.shallowSlice(7, 10).toString(), 'con')
+
+  t.end()
+})
+
+tape('shallow slice single buffer', function (t) {
+  t.plan(3)
+
+  const bl = new BufferListStream(['First', 'Second', 'Third'])
+
+  t.equal(bl.shallowSlice(0, 5).toString(), 'First')
+  t.equal(bl.shallowSlice(5, 11).toString(), 'Second')
+  t.equal(bl.shallowSlice(11, 16).toString(), 'Third')
+})
+
+tape('shallow slice with negative or omitted indices', function (t) {
+  t.plan(4)
+
+  const bl = new BufferListStream(['First', 'Second', 'Third'])
+
+  t.equal(bl.shallowSlice().toString(), 'FirstSecondThird')
+  t.equal(bl.shallowSlice(5).toString(), 'SecondThird')
+  t.equal(bl.shallowSlice(5, -3).toString(), 'SecondTh')
+  t.equal(bl.shallowSlice(-8).toString(), 'ondThird')
+})
+
+tape('shallow slice does not make a copy', function (t) {
+  t.plan(1)
+
+  const buffers = [Buffer.from('First'), Buffer.from('Second'), Buffer.from('Third')]
+  const bl = new BufferListStream(buffers).shallowSlice(5, -3)
+
+  buffers[1].fill('h')
+  buffers[2].fill('h')
+
+  t.equal(bl.toString(), 'hhhhhhhh')
+})
+
+tape('shallow slice with 0 length', function (t) {
+  t.plan(1)
+
+  const buffers = [Buffer.from('First'), Buffer.from('Second'), Buffer.from('Third')]
+  const bl = (new BufferListStream(buffers)).shallowSlice(0, 0)
+
+  t.equal(bl.length, 0)
+})
+
+tape('shallow slice with 0 length from middle', function (t) {
+  t.plan(1)
+
+  const buffers = [Buffer.from('First'), Buffer.from('Second'), Buffer.from('Third')]
+  const bl = (new BufferListStream(buffers)).shallowSlice(10, 10)
+
+  t.equal(bl.length, 0)
+})
+
+tape('duplicate', function (t) {
+  t.plan(2)
+
+  const bl = new BufferListStream('abcdefghij\xff\x00')
+  const dup = bl.duplicate()
+
+  t.equal(bl.prototype, dup.prototype)
+  t.equal(bl.toString('hex'), dup.toString('hex'))
+})
+
+tape('destroy no pipe', function (t) {
+  t.plan(2)
+
+  /** @type {BufferListStreamWithPrivate} */
+  const bl = new BufferListStream('alsdkfja;lsdkfja;lsdk')
+
+  bl.destroy()
+
+  t.equal(bl._bufs.length, 0)
+  t.equal(bl.length, 0)
+})
+
+tape('destroy with error', function (t) {
+  t.plan(3)
+
+  /** @type {BufferListStreamWithPrivate} */
+  const bl = new BufferListStream('alsdkfja;lsdkfja;lsdk')
+  const err = new Error('kaboom')
+
+  bl.destroy(err)
+  bl.on('error', function (_err) {
+    t.equal(_err, err)
+  })
+
+  t.equal(bl._bufs.length, 0)
+  t.equal(bl.length, 0)
+})
+
+!process.browser && tape('destroy with pipe before read end', function (t) {
+  t.plan(2)
+
+  /** @type {BufferListStreamWithPrivate} */
+  const bl = new BufferListStream()
+  fs.createReadStream(path.join(__dirname, '/test.js'))
+    .pipe(bl)
+
+  bl.destroy()
+
+  t.equal(bl._bufs.length, 0)
+  t.equal(bl.length, 0)
+})
+
+!process.browser && tape('destroy with pipe before read end with race', function (t) {
+  t.plan(2)
+
+  /** @type {BufferListStreamWithPrivate} */
+  const bl = new BufferListStream()
+
+  fs.createReadStream(path.join(__dirname, '/test.js'))
+    .pipe(bl)
+
+  setTimeout(function () {
+    bl.destroy()
+    setTimeout(function () {
+      t.equal(bl._bufs.length, 0)
+      t.equal(bl.length, 0)
+    }, 500)
+  }, 500)
+})
+
+!process.browser && tape('destroy with pipe after read end', function (t) {
+  t.plan(2)
+
+  /** @type {BufferListStreamWithPrivate} */
+  const bl = new BufferListStream()
+  fs.createReadStream(path.join(__dirname, '/test.js'))
+    .on('end', onEnd)
+    .pipe(bl)
+
+  function onEnd () {
+    bl.destroy()
+
+    t.equal(bl._bufs.length, 0)
+    t.equal(bl.length, 0)
+  }
+})
+
+!process.browser && tape('destroy with pipe while writing to a destination', function (t) {
+  t.plan(4)
+
+  /** @type {BufferListStreamWithPrivate} */
+  const bl = new BufferListStream()
+  const ds = new BufferListStream()
+
+  fs.createReadStream(path.join(__dirname, '/test.js'))
+    .on('end', onEnd)
+    .pipe(bl)
+
+  function onEnd () {
+    bl.pipe(ds)
+
+    setTimeout(function () {
+      bl.destroy()
+
+      t.equals(bl._bufs.length, 0)
+      t.equals(bl.length, 0)
+
+      ds.destroy()
+
+      t.equals(bl._bufs.length, 0)
+      t.equals(bl.length, 0)
+    }, 100)
+  }
+})
+
+!process.browser && tape('handle error', function (t) {
+  t.plan(2)
+
+  fs.createReadStream('/does/not/exist').pipe(BufferListStream(function (err, data) {
+    t.ok(err instanceof Error, 'has error')
+    t.notOk(data, 'no data')
+  }))
+})
diff --git a/mqtt-backend/node_modules/broker-factory/LICENSE b/mqtt-backend/node_modules/broker-factory/LICENSE
new file mode 100644
index 0000000..2f04624
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Christoph Guttandin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/broker-factory/README.md b/mqtt-backend/node_modules/broker-factory/README.md
new file mode 100644
index 0000000..0eead5f
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/README.md
@@ -0,0 +1,5 @@
+# broker-factory
+
+**A little factory function to create a broker for a JSON-RPC based Web Worker.**
+
+[![version](https://img.shields.io/npm/v/broker-factory.svg?style=flat-square)](https://www.npmjs.com/package/broker-factory)
diff --git a/mqtt-backend/node_modules/broker-factory/package.json b/mqtt-backend/node_modules/broker-factory/package.json
new file mode 100644
index 0000000..c3cfc1e
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/package.json
@@ -0,0 +1,69 @@
+{
+    "author": "Christoph Guttandin",
+    "bugs": {
+        "url": "https://github.com/chrisguttandin/broker-factory/issues"
+    },
+    "config": {
+        "commitizen": {
+            "path": "cz-conventional-changelog"
+        }
+    },
+    "dependencies": {
+        "@babel/runtime": "^7.29.2",
+        "fast-unique-numbers": "^9.0.27",
+        "tslib": "^2.8.1",
+        "worker-factory": "^7.0.49"
+    },
+    "description": "A little factory function to create a broker for a JSON-RPC based Web Worker.",
+    "devDependencies": {
+        "@babel/core": "^7.29.0",
+        "@babel/plugin-external-helpers": "^7.27.1",
+        "@babel/plugin-transform-runtime": "^7.29.0",
+        "@babel/preset-env": "^7.29.2",
+        "@commitlint/cli": "^20.5.0",
+        "@commitlint/config-angular": "^20.5.0",
+        "@rollup/plugin-babel": "^7.0.0",
+        "@vitest/browser-webdriverio": "^4.0.18",
+        "commitizen": "^4.3.1",
+        "cz-conventional-changelog": "^3.3.0",
+        "eslint": "^8.57.0",
+        "eslint-config-holy-grail": "^61.0.11",
+        "husky": "^9.1.7",
+        "lint-staged": "^16.4.0",
+        "prettier": "^3.8.1",
+        "rimraf": "^6.1.3",
+        "rollup": "^4.59.0",
+        "tsconfig-holy-grail": "^15.0.3",
+        "tslint": "^6.1.3",
+        "tslint-config-holy-grail": "^56.0.7",
+        "typescript": "^5.9.3",
+        "vitest": "^4.0.18"
+    },
+    "files": [
+        "build/es2019/",
+        "build/es5/",
+        "src/"
+    ],
+    "homepage": "https://github.com/chrisguttandin/broker-factory",
+    "license": "MIT",
+    "main": "build/es5/bundle.js",
+    "module": "build/es2019/module.js",
+    "name": "broker-factory",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/chrisguttandin/broker-factory.git"
+    },
+    "scripts": {
+        "build": "rimraf build/* && tsc --project src/tsconfig.json && rollup --config config/rollup/bundle.mjs",
+        "lint": "npm run lint:config && npm run lint:src && npm run lint:test",
+        "lint:config": "eslint --config config/eslint/config.json --ext .cjs --ext .js --ext .mjs --report-unused-disable-directives config/",
+        "lint:src": "tslint --config config/tslint/src.json --project src/tsconfig.json src/*.ts src/**/*.ts",
+        "lint:test": "eslint --config config/eslint/test.json --ext .js --report-unused-disable-directives test/",
+        "prepare": "husky",
+        "prepublishOnly": "npm run build",
+        "test": "npm run lint && npm run build && npm run test:unit",
+        "test:unit": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"unit\" ]; then npx vitest --config config/vitest/unit.ts; fi"
+    },
+    "types": "build/es2019/module.d.ts",
+    "version": "3.1.14"
+}
diff --git a/mqtt-backend/node_modules/broker-factory/src/factories/create-broker.ts b/mqtt-backend/node_modules/broker-factory/src/factories/create-broker.ts
new file mode 100644
index 0000000..5bda9bf
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/factories/create-broker.ts
@@ -0,0 +1,69 @@
+import type { generateUniqueNumber as generateUniqueNumberFunction } from 'fast-unique-numbers';
+import { IWorkerDefinition, IWorkerErrorMessage, IWorkerResultMessage } from 'worker-factory';
+import type { isMessagePort as isMessagePortFunction } from '../guards/message-port';
+import { IBrokerDefinition, IDefaultBrokerDefinition, IWorkerEvent } from '../interfaces';
+import { TBrokerImplementation } from '../types';
+import type { createCreateOrGetOngoingRequests } from './create-or-get-ongoing-requests';
+import type { createExtendBrokerImplementation } from './extend-broker-implementation';
+
+export const createBrokerFactory =
+    (
+        createOrGetOngoingRequests: ReturnType<typeof createCreateOrGetOngoingRequests>,
+        extendBrokerImplementation: ReturnType<typeof createExtendBrokerImplementation>,
+        generateUniqueNumber: typeof generateUniqueNumberFunction,
+        isMessagePort: typeof isMessagePortFunction
+    ) =>
+    <T extends IBrokerDefinition, U extends IWorkerDefinition>(
+        brokerImplementation: TBrokerImplementation<T, U>
+    ): ((sender: MessagePort | Worker) => T & IDefaultBrokerDefinition) => {
+        const fullBrokerImplementation = extendBrokerImplementation(brokerImplementation);
+
+        return (sender: MessagePort | Worker) => {
+            const ongoingRequests = createOrGetOngoingRequests(sender);
+
+            sender.addEventListener('message', <EventListener>(({ data: message }: IWorkerEvent) => {
+                const { id } = message;
+
+                if (id !== null && ongoingRequests.has(id)) {
+                    const { reject, resolve } = <{ reject: Function; resolve: Function }>ongoingRequests.get(id);
+
+                    ongoingRequests.delete(id);
+
+                    if ((<IWorkerErrorMessage>message).error === undefined) {
+                        resolve((<IWorkerResultMessage>message).result);
+                    } else {
+                        reject(new Error((<IWorkerErrorMessage>message).error.message));
+                    }
+                }
+            }));
+
+            if (isMessagePort(sender)) {
+                sender.start();
+            }
+
+            const call = <V extends keyof U>(method: V, params: U[V]['params'] = null, transferables: U[V]['transferables'] = []) => {
+                return new Promise<U[V]['response']['result']>((resolve, reject) => {
+                    const id = generateUniqueNumber(ongoingRequests);
+
+                    ongoingRequests.set(id, { reject, resolve });
+
+                    if (params === null) {
+                        sender.postMessage({ id, method }, <Transferable[]>transferables);
+                    } else {
+                        sender.postMessage({ id, method, params }, <Transferable[]>transferables);
+                    }
+                });
+            };
+            const notify = <V extends keyof U>(method: V, params: U[V]['params'], transferables: U[V]['transferables'] = []) => {
+                sender.postMessage({ id: null, method, params }, <Transferable[]>transferables);
+            };
+
+            let functions: object = {};
+
+            for (const [key, handler] of Object.entries(fullBrokerImplementation)) {
+                functions = { ...functions, [key]: handler({ call, notify }) };
+            }
+
+            return <T & IDefaultBrokerDefinition>{ ...functions };
+        };
+    };
diff --git a/mqtt-backend/node_modules/broker-factory/src/factories/create-or-get-ongoing-requests.ts b/mqtt-backend/node_modules/broker-factory/src/factories/create-or-get-ongoing-requests.ts
new file mode 100644
index 0000000..93f07a7
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/factories/create-or-get-ongoing-requests.ts
@@ -0,0 +1,14 @@
+export const createCreateOrGetOngoingRequests =
+    (ongoingRequestsMap: WeakMap<MessagePort | Worker, Map<number, { reject: Function; resolve: Function }>>) =>
+    (sender: MessagePort | Worker): Map<number, { reject: Function; resolve: Function }> => {
+        if (ongoingRequestsMap.has(sender)) {
+            // @todo TypeScript needs to be convinced that has() works as expected.
+            return <Map<number, { reject: Function; resolve: Function }>>ongoingRequestsMap.get(sender);
+        }
+
+        const ongoingRequests: Map<number, { reject: Function; resolve: Function }> = new Map();
+
+        ongoingRequestsMap.set(sender, ongoingRequests);
+
+        return ongoingRequests;
+    };
diff --git a/mqtt-backend/node_modules/broker-factory/src/factories/extend-broker-implementation.ts b/mqtt-backend/node_modules/broker-factory/src/factories/extend-broker-implementation.ts
new file mode 100644
index 0000000..5358fcd
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/factories/extend-broker-implementation.ts
@@ -0,0 +1,37 @@
+import { IWorkerDefinition } from 'worker-factory';
+import { IBrokerDefinition, IDefaultBrokerDefinition } from '../interfaces';
+import { TBrokerImplementation } from '../types';
+
+export const createExtendBrokerImplementation =
+    (portMap: WeakMap<MessagePort, number>) =>
+    <T extends IBrokerDefinition, U extends IWorkerDefinition>(
+        partialBrokerImplementation: TBrokerImplementation<T, U>
+    ): TBrokerImplementation<T & IDefaultBrokerDefinition, U> =>
+        <TBrokerImplementation<T & IDefaultBrokerDefinition, U>>{
+            ...partialBrokerImplementation,
+            connect: ({ call }) => {
+                return async (): Promise<MessagePort> => {
+                    const { port1, port2 } = new MessageChannel();
+
+                    const portId = <number>await call('connect', { port: port1 }, [port1]);
+
+                    portMap.set(port2, portId);
+
+                    return port2;
+                };
+            },
+            disconnect: ({ call }) => {
+                return async (port: MessagePort): Promise<void> => {
+                    const portId = portMap.get(port);
+
+                    if (portId === undefined) {
+                        throw new Error('The given port is not connected.');
+                    }
+
+                    await call('disconnect', { portId });
+                };
+            },
+            isSupported: ({ call }) => {
+                return () => call('isSupported');
+            }
+        };
diff --git a/mqtt-backend/node_modules/broker-factory/src/guards/message-port.ts b/mqtt-backend/node_modules/broker-factory/src/guards/message-port.ts
new file mode 100644
index 0000000..4bb7abe
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/guards/message-port.ts
@@ -0,0 +1,3 @@
+export const isMessagePort = (sender: MessagePort | Worker): sender is MessagePort => {
+    return typeof (<MessagePort>sender).start === 'function';
+};
diff --git a/mqtt-backend/node_modules/broker-factory/src/interfaces/broker-actions.ts b/mqtt-backend/node_modules/broker-factory/src/interfaces/broker-actions.ts
new file mode 100644
index 0000000..334a38e
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/interfaces/broker-actions.ts
@@ -0,0 +1,7 @@
+import { IWorkerDefinition } from 'worker-factory';
+
+export interface IBrokerActions<T extends IWorkerDefinition> {
+    call<U extends keyof T>(method: U, params?: T[U]['params'], transferables?: T[U]['transferables']): Promise<T[U]['response']['result']>;
+
+    notify<U extends keyof T>(method: U, params: T[U]['params'], transferables?: T[U]['transferables']): void;
+}
diff --git a/mqtt-backend/node_modules/broker-factory/src/interfaces/broker-definition.ts b/mqtt-backend/node_modules/broker-factory/src/interfaces/broker-definition.ts
new file mode 100644
index 0000000..fd0a4eb
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/interfaces/broker-definition.ts
@@ -0,0 +1,3 @@
+export interface IBrokerDefinition {
+    [method: string]: (...args: any[]) => any; // tslint:disable-line:invalid-void
+}
diff --git a/mqtt-backend/node_modules/broker-factory/src/interfaces/default-broker-definition.ts b/mqtt-backend/node_modules/broker-factory/src/interfaces/default-broker-definition.ts
new file mode 100644
index 0000000..ab3fe1a
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/interfaces/default-broker-definition.ts
@@ -0,0 +1,9 @@
+import { IBrokerDefinition } from './broker-definition';
+
+export interface IDefaultBrokerDefinition extends IBrokerDefinition {
+    connect(): Promise<MessagePort>;
+
+    disconnect(port: MessagePort): Promise<void>;
+
+    isSupported(): Promise<boolean>;
+}
diff --git a/mqtt-backend/node_modules/broker-factory/src/interfaces/index.ts b/mqtt-backend/node_modules/broker-factory/src/interfaces/index.ts
new file mode 100644
index 0000000..ac8291d
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/interfaces/index.ts
@@ -0,0 +1,4 @@
+export * from './broker-actions';
+export * from './broker-definition';
+export * from './default-broker-definition';
+export * from './worker-event';
diff --git a/mqtt-backend/node_modules/broker-factory/src/interfaces/worker-event.ts b/mqtt-backend/node_modules/broker-factory/src/interfaces/worker-event.ts
new file mode 100644
index 0000000..a589e13
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/interfaces/worker-event.ts
@@ -0,0 +1,5 @@
+import { TWorkerMessage } from 'worker-factory';
+
+export interface IWorkerEvent extends Event {
+    data: TWorkerMessage;
+}
diff --git a/mqtt-backend/node_modules/broker-factory/src/module.ts b/mqtt-backend/node_modules/broker-factory/src/module.ts
new file mode 100644
index 0000000..8bc4210
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/module.ts
@@ -0,0 +1,19 @@
+import { generateUniqueNumber } from 'fast-unique-numbers';
+import { createBrokerFactory } from './factories/create-broker';
+import { createCreateOrGetOngoingRequests } from './factories/create-or-get-ongoing-requests';
+import { createExtendBrokerImplementation } from './factories/extend-broker-implementation';
+import { isMessagePort } from './guards/message-port';
+
+/*
+ * @todo Explicitly referencing the barrel file seems to be necessary when enabling the
+ * isolatedModules compiler option.
+ */
+export * from './interfaces/index';
+export * from './types/index';
+
+export const createBroker = createBrokerFactory(
+    createCreateOrGetOngoingRequests(new WeakMap<MessagePort | Worker, Map<number, { reject: Function; resolve: Function }>>()),
+    createExtendBrokerImplementation(new WeakMap<MessagePort, number>()),
+    generateUniqueNumber,
+    isMessagePort
+);
diff --git a/mqtt-backend/node_modules/broker-factory/src/tsconfig.json b/mqtt-backend/node_modules/broker-factory/src/tsconfig.json
new file mode 100644
index 0000000..53941c6
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/tsconfig.json
@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "isolatedModules": true
+    },
+    "extends": "tsconfig-holy-grail/src/tsconfig-browser"
+}
diff --git a/mqtt-backend/node_modules/broker-factory/src/types/broker-implementation.ts b/mqtt-backend/node_modules/broker-factory/src/types/broker-implementation.ts
new file mode 100644
index 0000000..7d4bff7
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/types/broker-implementation.ts
@@ -0,0 +1,6 @@
+import { IWorkerDefinition } from 'worker-factory';
+import { IBrokerActions, IBrokerDefinition } from '../interfaces';
+
+export type TBrokerImplementation<T extends IBrokerDefinition, U extends IWorkerDefinition> = {
+    [P in keyof T]: (actions: IBrokerActions<U>) => T[P];
+};
diff --git a/mqtt-backend/node_modules/broker-factory/src/types/index.ts b/mqtt-backend/node_modules/broker-factory/src/types/index.ts
new file mode 100644
index 0000000..41dab0d
--- /dev/null
+++ b/mqtt-backend/node_modules/broker-factory/src/types/index.ts
@@ -0,0 +1 @@
+export * from './broker-implementation';
diff --git a/mqtt-backend/node_modules/buffer-from/LICENSE b/mqtt-backend/node_modules/buffer-from/LICENSE
new file mode 100644
index 0000000..e4bf1d6
--- /dev/null
+++ b/mqtt-backend/node_modules/buffer-from/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2016, 2018 Linus Unnebäck
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/buffer-from/index.js b/mqtt-backend/node_modules/buffer-from/index.js
new file mode 100644
index 0000000..e1a58b5
--- /dev/null
+++ b/mqtt-backend/node_modules/buffer-from/index.js
@@ -0,0 +1,72 @@
+/* eslint-disable node/no-deprecated-api */
+
+var toString = Object.prototype.toString
+
+var isModern = (
+  typeof Buffer !== 'undefined' &&
+  typeof Buffer.alloc === 'function' &&
+  typeof Buffer.allocUnsafe === 'function' &&
+  typeof Buffer.from === 'function'
+)
+
+function isArrayBuffer (input) {
+  return toString.call(input).slice(8, -1) === 'ArrayBuffer'
+}
+
+function fromArrayBuffer (obj, byteOffset, length) {
+  byteOffset >>>= 0
+
+  var maxLength = obj.byteLength - byteOffset
+
+  if (maxLength < 0) {
+    throw new RangeError("'offset' is out of bounds")
+  }
+
+  if (length === undefined) {
+    length = maxLength
+  } else {
+    length >>>= 0
+
+    if (length > maxLength) {
+      throw new RangeError("'length' is out of bounds")
+    }
+  }
+
+  return isModern
+    ? Buffer.from(obj.slice(byteOffset, byteOffset + length))
+    : new Buffer(new Uint8Array(obj.slice(byteOffset, byteOffset + length)))
+}
+
+function fromString (string, encoding) {
+  if (typeof encoding !== 'string' || encoding === '') {
+    encoding = 'utf8'
+  }
+
+  if (!Buffer.isEncoding(encoding)) {
+    throw new TypeError('"encoding" must be a valid string encoding')
+  }
+
+  return isModern
+    ? Buffer.from(string, encoding)
+    : new Buffer(string, encoding)
+}
+
+function bufferFrom (value, encodingOrOffset, length) {
+  if (typeof value === 'number') {
+    throw new TypeError('"value" argument must not be a number')
+  }
+
+  if (isArrayBuffer(value)) {
+    return fromArrayBuffer(value, encodingOrOffset, length)
+  }
+
+  if (typeof value === 'string') {
+    return fromString(value, encodingOrOffset)
+  }
+
+  return isModern
+    ? Buffer.from(value)
+    : new Buffer(value)
+}
+
+module.exports = bufferFrom
diff --git a/mqtt-backend/node_modules/buffer-from/package.json b/mqtt-backend/node_modules/buffer-from/package.json
new file mode 100644
index 0000000..6ac5327
--- /dev/null
+++ b/mqtt-backend/node_modules/buffer-from/package.json
@@ -0,0 +1,19 @@
+{
+  "name": "buffer-from",
+  "version": "1.1.2",
+  "license": "MIT",
+  "repository": "LinusU/buffer-from",
+  "files": [
+    "index.js"
+  ],
+  "scripts": {
+    "test": "standard && node test"
+  },
+  "devDependencies": {
+    "standard": "^12.0.1"
+  },
+  "keywords": [
+    "buffer",
+    "buffer from"
+  ]
+}
diff --git a/mqtt-backend/node_modules/buffer-from/readme.md b/mqtt-backend/node_modules/buffer-from/readme.md
new file mode 100644
index 0000000..9880a55
--- /dev/null
+++ b/mqtt-backend/node_modules/buffer-from/readme.md
@@ -0,0 +1,69 @@
+# Buffer From
+
+A [ponyfill](https://ponyfill.com) for `Buffer.from`, uses native implementation if available.
+
+## Installation
+
+```sh
+npm install --save buffer-from
+```
+
+## Usage
+
+```js
+const bufferFrom = require('buffer-from')
+
+console.log(bufferFrom([1, 2, 3, 4]))
+//=> <Buffer 01 02 03 04>
+
+const arr = new Uint8Array([1, 2, 3, 4])
+console.log(bufferFrom(arr.buffer, 1, 2))
+//=> <Buffer 02 03>
+
+console.log(bufferFrom('test', 'utf8'))
+//=> <Buffer 74 65 73 74>
+
+const buf = bufferFrom('test')
+console.log(bufferFrom(buf))
+//=> <Buffer 74 65 73 74>
+```
+
+## API
+
+### bufferFrom(array)
+
+- `array` &lt;Array&gt;
+
+Allocates a new `Buffer` using an `array` of octets.
+
+### bufferFrom(arrayBuffer[, byteOffset[, length]])
+
+- `arrayBuffer` &lt;ArrayBuffer&gt; The `.buffer` property of a TypedArray or ArrayBuffer
+- `byteOffset` &lt;Integer&gt; Where to start copying from `arrayBuffer`. **Default:** `0`
+- `length` &lt;Integer&gt; How many bytes to copy from `arrayBuffer`. **Default:** `arrayBuffer.length - byteOffset`
+
+When passed a reference to the `.buffer` property of a TypedArray instance, the
+newly created `Buffer` will share the same allocated memory as the TypedArray.
+
+The optional `byteOffset` and `length` arguments specify a memory range within
+the `arrayBuffer` that will be shared by the `Buffer`.
+
+### bufferFrom(buffer)
+
+- `buffer` &lt;Buffer&gt; An existing `Buffer` to copy data from
+
+Copies the passed `buffer` data onto a new `Buffer` instance.
+
+### bufferFrom(string[, encoding])
+
+- `string` &lt;String&gt; A string to encode.
+- `encoding` &lt;String&gt; The encoding of `string`. **Default:** `'utf8'`
+
+Creates a new `Buffer` containing the given JavaScript string `string`. If
+provided, the `encoding` parameter identifies the character encoding of
+`string`.
+
+## See also
+
+- [buffer-alloc](https://github.com/LinusU/buffer-alloc) A ponyfill for `Buffer.alloc`
+- [buffer-alloc-unsafe](https://github.com/LinusU/buffer-alloc-unsafe) A ponyfill for `Buffer.allocUnsafe`
diff --git a/mqtt-backend/node_modules/buffer/AUTHORS.md b/mqtt-backend/node_modules/buffer/AUTHORS.md
new file mode 100644
index 0000000..22eb171
--- /dev/null
+++ b/mqtt-backend/node_modules/buffer/AUTHORS.md
@@ -0,0 +1,70 @@
+# Authors
+
+#### Ordered by first contribution.
+
+- Romain Beauxis (toots@rastageeks.org)
+- Tobias Koppers (tobias.koppers@googlemail.com)
+- Janus (ysangkok@gmail.com)
+- Rainer Dreyer (rdrey1@gmail.com)
+- Tõnis Tiigi (tonistiigi@gmail.com)
+- James Halliday (mail@substack.net)
+- Michael Williamson (mike@zwobble.org)
+- elliottcable (github@elliottcable.name)
+- rafael (rvalle@livelens.net)
+- Andrew Kelley (superjoe30@gmail.com)
+- Andreas Madsen (amwebdk@gmail.com)
+- Mike Brevoort (mike.brevoort@pearson.com)
+- Brian White (mscdex@mscdex.net)
+- Feross Aboukhadijeh (feross@feross.org)
+- Ruben Verborgh (ruben@verborgh.org)
+- eliang (eliang.cs@gmail.com)
+- Jesse Tane (jesse.tane@gmail.com)
+- Alfonso Boza (alfonso@cloud.com)
+- Mathias Buus (mathiasbuus@gmail.com)
+- Devon Govett (devongovett@gmail.com)
+- Daniel Cousens (github@dcousens.com)
+- Joseph Dykstra (josephdykstra@gmail.com)
+- Parsha Pourkhomami (parshap+git@gmail.com)
+- Damjan Košir (damjan.kosir@gmail.com)
+- daverayment (dave.rayment@gmail.com)
+- kawanet (u-suke@kawa.net)
+- Linus Unnebäck (linus@folkdatorn.se)
+- Nolan Lawson (nolan.lawson@gmail.com)
+- Calvin Metcalf (calvin.metcalf@gmail.com)
+- Koki Takahashi (hakatasiloving@gmail.com)
+- Guy Bedford (guybedford@gmail.com)
+- Jan Schär (jscissr@gmail.com)
+- RaulTsc (tomescu.raul@gmail.com)
+- Matthieu Monsch (monsch@alum.mit.edu)
+- Dan Ehrenberg (littledan@chromium.org)
+- Kirill Fomichev (fanatid@ya.ru)
+- Yusuke Kawasaki (u-suke@kawa.net)
+- DC (dcposch@dcpos.ch)
+- John-David Dalton (john.david.dalton@gmail.com)
+- adventure-yunfei (adventure030@gmail.com)
+- Emil Bay (github@tixz.dk)
+- Sam Sudar (sudar.sam@gmail.com)
+- Volker Mische (volker.mische@gmail.com)
+- David Walton (support@geekstocks.com)
+- Сковорода Никита Андреевич (chalkerx@gmail.com)
+- greenkeeper[bot] (greenkeeper[bot]@users.noreply.github.com)
+- ukstv (sergey.ukustov@machinomy.com)
+- Renée Kooi (renee@kooi.me)
+- ranbochen (ranbochen@qq.com)
+- Vladimir Borovik (bobahbdb@gmail.com)
+- greenkeeper[bot] (23040076+greenkeeper[bot]@users.noreply.github.com)
+- kumavis (aaron@kumavis.me)
+- Sergey Ukustov (sergey.ukustov@machinomy.com)
+- Fei Liu (liu.feiwood@gmail.com)
+- Blaine Bublitz (blaine.bublitz@gmail.com)
+- clement (clement@seald.io)
+- Koushik Dutta (koushd@gmail.com)
+- Jordan Harband (ljharb@gmail.com)
+- Niklas Mischkulnig (mischnic@users.noreply.github.com)
+- Nikolai Vavilov (vvnicholas@gmail.com)
+- Fedor Nezhivoi (gyzerok@users.noreply.github.com)
+- Peter Newman (peternewman@users.noreply.github.com)
+- mathmakgakpak (44949126+mathmakgakpak@users.noreply.github.com)
+- jkkang (jkkang@smartauth.kr)
+
+#### Generated by bin/update-authors.sh.
diff --git a/mqtt-backend/node_modules/buffer/LICENSE b/mqtt-backend/node_modules/buffer/LICENSE
new file mode 100644
index 0000000..d6bf75d
--- /dev/null
+++ b/mqtt-backend/node_modules/buffer/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) Feross Aboukhadijeh, and other contributors.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/buffer/README.md b/mqtt-backend/node_modules/buffer/README.md
new file mode 100644
index 0000000..9a23d7c
--- /dev/null
+++ b/mqtt-backend/node_modules/buffer/README.md
@@ -0,0 +1,410 @@
+# buffer [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url] [![javascript style guide][standard-image]][standard-url]
+
+[travis-image]: https://img.shields.io/travis/feross/buffer/master.svg
+[travis-url]: https://travis-ci.org/feross/buffer
+[npm-image]: https://img.shields.io/npm/v/buffer.svg
+[npm-url]: https://npmjs.org/package/buffer
+[downloads-image]: https://img.shields.io/npm/dm/buffer.svg
+[downloads-url]: https://npmjs.org/package/buffer
+[standard-image]: https://img.shields.io/badge/code_style-standard-brightgreen.svg
+[standard-url]: https://standardjs.com
+
+#### The buffer module from [node.js](https://nodejs.org/), for the browser.
+
+[![saucelabs][saucelabs-image]][saucelabs-url]
+
+[saucelabs-image]: https://saucelabs.com/browser-matrix/buffer.svg
+[saucelabs-url]: https://saucelabs.com/u/buffer
+
+With [browserify](http://browserify.org), simply `require('buffer')` or use the `Buffer` global and you will get this module.
+
+The goal is to provide an API that is 100% identical to
+[node's Buffer API](https://nodejs.org/api/buffer.html). Read the
+[official docs](https://nodejs.org/api/buffer.html) for the full list of properties,
+instance methods, and class methods that are supported.
+
+## features
+
+- Manipulate binary data like a boss, in all browsers!
+- Super fast. Backed by Typed Arrays (`Uint8Array`/`ArrayBuffer`, not `Object`)
+- Extremely small bundle size (**6.75KB minified + gzipped**, 51.9KB with comments)
+- Excellent browser support (Chrome, Firefox, Edge, Safari 9+, IE 11, iOS 9+, Android, etc.)
+- Preserves Node API exactly, with one minor difference (see below)
+- Square-bracket `buf[4]` notation works!
+- Does not modify any browser prototypes or put anything on `window`
+- Comprehensive test suite (including all buffer tests from node.js core)
+
+## install
+
+To use this module directly (without browserify), install it:
+
+```bash
+npm install buffer
+```
+
+This module was previously called **native-buffer-browserify**, but please use **buffer**
+from now on.
+
+If you do not use a bundler, you can use the [standalone script](https://bundle.run/buffer).
+
+## usage
+
+The module's API is identical to node's `Buffer` API. Read the
+[official docs](https://nodejs.org/api/buffer.html) for the full list of properties,
+instance methods, and class methods that are supported.
+
+As mentioned above, `require('buffer')` or use the `Buffer` global with
+[browserify](http://browserify.org) and this module will automatically be included
+in your bundle. Almost any npm module will work in the browser, even if it assumes that
+the node `Buffer` API will be available.
+
+To depend on this module explicitly (without browserify), require it like this:
+
+```js
+var Buffer = require('buffer/').Buffer  // note: the trailing slash is important!
+```
+
+To require this module explicitly, use `require('buffer/')` which tells the node.js module
+lookup algorithm (also used by browserify) to use the **npm module** named `buffer`
+instead of the **node.js core** module named `buffer`!
+
+
+## how does it work?
+
+The Buffer constructor returns instances of `Uint8Array` that have their prototype
+changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of `Uint8Array`,
+so the returned instances will have all the node `Buffer` methods and the
+`Uint8Array` methods. Square bracket notation works as expected -- it returns a
+single octet.
+
+The `Uint8Array` prototype remains unmodified.
+
+
+## tracking the latest node api
+
+This module tracks the Buffer API in the latest (unstable) version of node.js. The Buffer
+API is considered **stable** in the
+[node stability index](https://nodejs.org/docs/latest/api/documentation.html#documentation_stability_index),
+so it is unlikely that there will ever be breaking changes.
+Nonetheless, when/if the Buffer API changes in node, this module's API will change
+accordingly.
+
+## related packages
+
+- [`buffer-reverse`](https://www.npmjs.com/package/buffer-reverse) - Reverse a buffer
+- [`buffer-xor`](https://www.npmjs.com/package/buffer-xor) - Bitwise xor a buffer
+- [`is-buffer`](https://www.npmjs.com/package/is-buffer) - Determine if an object is a Buffer without including the whole `Buffer` package
+
+## conversion packages
+
+### convert typed array to buffer
+
+Use [`typedarray-to-buffer`](https://www.npmjs.com/package/typedarray-to-buffer) to convert any kind of typed array to a `Buffer`. Does not perform a copy, so it's super fast.
+
+### convert buffer to typed array
+
+`Buffer` is a subclass of `Uint8Array` (which is a typed array). So there is no need to explicitly convert to typed array. Just use the buffer as a `Uint8Array`.
+
+### convert blob to buffer
+
+Use [`blob-to-buffer`](https://www.npmjs.com/package/blob-to-buffer) to convert a `Blob` to a `Buffer`.
+
+### convert buffer to blob
+
+To convert a `Buffer` to a `Blob`, use the `Blob` constructor:
+
+```js
+var blob = new Blob([ buffer ])
+```
+
+Optionally, specify a mimetype:
+
+```js
+var blob = new Blob([ buffer ], { type: 'text/html' })
+```
+
+### convert arraybuffer to buffer
+
+To convert an `ArrayBuffer` to a `Buffer`, use the `Buffer.from` function. Does not perform a copy, so it's super fast.
+
+```js
+var buffer = Buffer.from(arrayBuffer)
+```
+
+### convert buffer to arraybuffer
+
+To convert a `Buffer` to an `ArrayBuffer`, use the `.buffer` property (which is present on all `Uint8Array` objects):
+
+```js
+var arrayBuffer = buffer.buffer.slice(
+  buffer.byteOffset, buffer.byteOffset + buffer.byteLength
+)
+```
+
+Alternatively, use the [`to-arraybuffer`](https://www.npmjs.com/package/to-arraybuffer) module.
+
+## performance
+
+See perf tests in `/perf`.
+
+`BrowserBuffer` is the browser `buffer` module (this repo). `Uint8Array` is included as a
+sanity check (since `BrowserBuffer` uses `Uint8Array` under the hood, `Uint8Array` will
+always be at least a bit faster). Finally, `NodeBuffer` is the node.js buffer module,
+which is included to compare against.
+
+NOTE: Performance has improved since these benchmarks were taken. PR welcome to update the README.
+
+### Chrome 38
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 11,457,464 ops/sec | ±0.86% | 66 | ✓ |
+| Uint8Array#bracket-notation | 10,824,332 ops/sec | ±0.74% | 65 | |
+| | | | |
+| BrowserBuffer#concat | 450,532 ops/sec | ±0.76% | 68 | |
+| Uint8Array#concat | 1,368,911 ops/sec | ±1.50% | 62 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 903,001 ops/sec | ±0.96% | 67 | |
+| Uint8Array#copy(16000) | 1,422,441 ops/sec | ±1.04% | 66 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 11,431,358 ops/sec | ±0.46% | 69 | |
+| Uint8Array#copy(16) | 13,944,163 ops/sec | ±1.12% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 106,329 ops/sec | ±6.70% | 44 | |
+| Uint8Array#new(16000) | 131,001 ops/sec | ±2.85% | 31 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,554,491 ops/sec | ±1.60% | 65 | |
+| Uint8Array#new(16) | 6,623,930 ops/sec | ±1.66% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 112,830 ops/sec | ±0.51% | 69 | ✓ |
+| DataView#getFloat64 | 93,500 ops/sec | ±0.57% | 68 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 146,678 ops/sec | ±0.95% | 68 | ✓ |
+| DataView#getFloat32 | 99,311 ops/sec | ±0.41% | 67 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 843,214 ops/sec | ±0.70% | 69 | ✓ |
+| DataView#getUint32 | 103,024 ops/sec | ±0.64% | 67 | |
+| | | | |
+| BrowserBuffer#slice | 1,013,941 ops/sec | ±0.75% | 67 | |
+| Uint8Array#subarray | 1,903,928 ops/sec | ±0.53% | 67 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 61,387 ops/sec | ±0.90% | 67 | |
+| DataView#setFloat32 | 141,249 ops/sec | ±0.40% | 66 | ✓ |
+
+
+### Firefox 33
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 20,800,421 ops/sec | ±1.84% | 60 | |
+| Uint8Array#bracket-notation | 20,826,235 ops/sec | ±2.02% | 61 | ✓ |
+| | | | |
+| BrowserBuffer#concat | 153,076 ops/sec | ±2.32% | 61 | |
+| Uint8Array#concat | 1,255,674 ops/sec | ±8.65% | 52 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,105,312 ops/sec | ±1.16% | 63 | |
+| Uint8Array#copy(16000) | 1,615,911 ops/sec | ±0.55% | 66 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 16,357,599 ops/sec | ±0.73% | 68 | |
+| Uint8Array#copy(16) | 31,436,281 ops/sec | ±1.05% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 52,995 ops/sec | ±6.01% | 35 | |
+| Uint8Array#new(16000) | 87,686 ops/sec | ±5.68% | 45 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 252,031 ops/sec | ±1.61% | 66 | |
+| Uint8Array#new(16) | 8,477,026 ops/sec | ±0.49% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 99,871 ops/sec | ±0.41% | 69 | |
+| DataView#getFloat64 | 285,663 ops/sec | ±0.70% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readFloatBE | 115,540 ops/sec | ±0.42% | 69 | |
+| DataView#getFloat32 | 288,722 ops/sec | ±0.82% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readUInt32LE | 633,926 ops/sec | ±1.08% | 67 | ✓ |
+| DataView#getUint32 | 294,808 ops/sec | ±0.79% | 64 | |
+| | | | |
+| BrowserBuffer#slice | 349,425 ops/sec | ±0.46% | 69 | |
+| Uint8Array#subarray | 5,965,819 ops/sec | ±0.60% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 59,980 ops/sec | ±0.41% | 67 | |
+| DataView#setFloat32 | 317,634 ops/sec | ±0.63% | 68 | ✓ |
+
+### Safari 8
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,279,729 ops/sec | ±2.25% | 56 | ✓ |
+| Uint8Array#bracket-notation | 10,030,767 ops/sec | ±2.23% | 59 | |
+| | | | |
+| BrowserBuffer#concat | 144,138 ops/sec | ±1.38% | 65 | |
+| Uint8Array#concat | 4,950,764 ops/sec | ±1.70% | 63 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,058,548 ops/sec | ±1.51% | 64 | |
+| Uint8Array#copy(16000) | 1,409,666 ops/sec | ±1.17% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 6,282,529 ops/sec | ±1.88% | 58 | |
+| Uint8Array#copy(16) | 11,907,128 ops/sec | ±2.87% | 58 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 101,663 ops/sec | ±3.89% | 57 | |
+| Uint8Array#new(16000) | 22,050,818 ops/sec | ±6.51% | 46 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 176,072 ops/sec | ±2.13% | 64 | |
+| Uint8Array#new(16) | 24,385,731 ops/sec | ±5.01% | 51 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 41,341 ops/sec | ±1.06% | 67 | |
+| DataView#getFloat64 | 322,280 ops/sec | ±0.84% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readFloatBE | 46,141 ops/sec | ±1.06% | 65 | |
+| DataView#getFloat32 | 337,025 ops/sec | ±0.43% | 69 | ✓ |
+| | | | |
+| BrowserBuffer#readUInt32LE | 151,551 ops/sec | ±1.02% | 66 | |
+| DataView#getUint32 | 308,278 ops/sec | ±0.94% | 67 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 197,365 ops/sec | ±0.95% | 66 | |
+| Uint8Array#subarray | 9,558,024 ops/sec | ±3.08% | 58 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 17,518 ops/sec | ±1.03% | 63 | |
+| DataView#setFloat32 | 319,751 ops/sec | ±0.48% | 68 | ✓ |
+
+
+### Node 0.11.14
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,489,828 ops/sec | ±3.25% | 90 | |
+| Uint8Array#bracket-notation | 10,534,884 ops/sec | ±0.81% | 92 | ✓ |
+| NodeBuffer#bracket-notation | 10,389,910 ops/sec | ±0.97% | 87 | |
+| | | | |
+| BrowserBuffer#concat | 487,830 ops/sec | ±2.58% | 88 | |
+| Uint8Array#concat | 1,814,327 ops/sec | ±1.28% | 88 | ✓ |
+| NodeBuffer#concat | 1,636,523 ops/sec | ±1.88% | 73 | |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,073,665 ops/sec | ±0.77% | 90 | |
+| Uint8Array#copy(16000) | 1,348,517 ops/sec | ±0.84% | 89 | ✓ |
+| NodeBuffer#copy(16000) | 1,289,533 ops/sec | ±0.82% | 93 | |
+| | | | |
+| BrowserBuffer#copy(16) | 12,782,706 ops/sec | ±0.74% | 85 | |
+| Uint8Array#copy(16) | 14,180,427 ops/sec | ±0.93% | 92 | ✓ |
+| NodeBuffer#copy(16) | 11,083,134 ops/sec | ±1.06% | 89 | |
+| | | | |
+| BrowserBuffer#new(16000) | 141,678 ops/sec | ±3.30% | 67 | |
+| Uint8Array#new(16000) | 161,491 ops/sec | ±2.96% | 60 | |
+| NodeBuffer#new(16000) | 292,699 ops/sec | ±3.20% | 55 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,655,466 ops/sec | ±2.41% | 82 | |
+| Uint8Array#new(16) | 14,399,926 ops/sec | ±0.91% | 94 | ✓ |
+| NodeBuffer#new(16) | 3,894,696 ops/sec | ±0.88% | 92 | |
+| | | | |
+| BrowserBuffer#readDoubleBE | 109,582 ops/sec | ±0.75% | 93 | ✓ |
+| DataView#getFloat64 | 91,235 ops/sec | ±0.81% | 90 | |
+| NodeBuffer#readDoubleBE | 88,593 ops/sec | ±0.96% | 81 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 139,854 ops/sec | ±1.03% | 85 | ✓ |
+| DataView#getFloat32 | 98,744 ops/sec | ±0.80% | 89 | |
+| NodeBuffer#readFloatBE | 92,769 ops/sec | ±0.94% | 93 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 710,861 ops/sec | ±0.82% | 92 | |
+| DataView#getUint32 | 117,893 ops/sec | ±0.84% | 91 | |
+| NodeBuffer#readUInt32LE | 851,412 ops/sec | ±0.72% | 93 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 1,673,877 ops/sec | ±0.73% | 94 | |
+| Uint8Array#subarray | 6,919,243 ops/sec | ±0.67% | 90 | ✓ |
+| NodeBuffer#slice | 4,617,604 ops/sec | ±0.79% | 93 | |
+| | | | |
+| BrowserBuffer#writeFloatBE | 66,011 ops/sec | ±0.75% | 93 | |
+| DataView#setFloat32 | 127,760 ops/sec | ±0.72% | 93 | ✓ |
+| NodeBuffer#writeFloatBE | 103,352 ops/sec | ±0.83% | 93 | |
+
+### iojs 1.8.1
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,990,488 ops/sec | ±1.11% | 91 | |
+| Uint8Array#bracket-notation | 11,268,757 ops/sec | ±0.65% | 97 | |
+| NodeBuffer#bracket-notation | 11,353,260 ops/sec | ±0.83% | 94 | ✓ |
+| | | | |
+| BrowserBuffer#concat | 378,954 ops/sec | ±0.74% | 94 | |
+| Uint8Array#concat | 1,358,288 ops/sec | ±0.97% | 87 | |
+| NodeBuffer#concat | 1,934,050 ops/sec | ±1.11% | 78 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 894,538 ops/sec | ±0.56% | 84 | |
+| Uint8Array#copy(16000) | 1,442,656 ops/sec | ±0.71% | 96 | |
+| NodeBuffer#copy(16000) | 1,457,898 ops/sec | ±0.53% | 92 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 12,870,457 ops/sec | ±0.67% | 95 | |
+| Uint8Array#copy(16) | 16,643,989 ops/sec | ±0.61% | 93 | ✓ |
+| NodeBuffer#copy(16) | 14,885,848 ops/sec | ±0.74% | 94 | |
+| | | | |
+| BrowserBuffer#new(16000) | 109,264 ops/sec | ±4.21% | 63 | |
+| Uint8Array#new(16000) | 138,916 ops/sec | ±1.87% | 61 | |
+| NodeBuffer#new(16000) | 281,449 ops/sec | ±3.58% | 51 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,362,935 ops/sec | ±0.56% | 99 | |
+| Uint8Array#new(16) | 6,193,090 ops/sec | ±0.64% | 95 | ✓ |
+| NodeBuffer#new(16) | 4,745,425 ops/sec | ±1.56% | 90 | |
+| | | | |
+| BrowserBuffer#readDoubleBE | 118,127 ops/sec | ±0.59% | 93 | ✓ |
+| DataView#getFloat64 | 107,332 ops/sec | ±0.65% | 91 | |
+| NodeBuffer#readDoubleBE | 116,274 ops/sec | ±0.94% | 95 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 150,326 ops/sec | ±0.58% | 95 | ✓ |
+| DataView#getFloat32 | 110,541 ops/sec | ±0.57% | 98 | |
+| NodeBuffer#readFloatBE | 121,599 ops/sec | ±0.60% | 87 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 814,147 ops/sec | ±0.62% | 93 | |
+| DataView#getUint32 | 137,592 ops/sec | ±0.64% | 90 | |
+| NodeBuffer#readUInt32LE | 931,650 ops/sec | ±0.71% | 96 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 878,590 ops/sec | ±0.68% | 93 | |
+| Uint8Array#subarray | 2,843,308 ops/sec | ±1.02% | 90 | |
+| NodeBuffer#slice | 4,998,316 ops/sec | ±0.68% | 90 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 65,927 ops/sec | ±0.74% | 93 | |
+| DataView#setFloat32 | 139,823 ops/sec | ±0.97% | 89 | ✓ |
+| NodeBuffer#writeFloatBE | 135,763 ops/sec | ±0.65% | 96 | |
+| | | | |
+
+## Testing the project
+
+First, install the project:
+
+    npm install
+
+Then, to run tests in Node.js, run:
+
+    npm run test-node
+
+To test locally in a browser, you can run:
+
+    npm run test-browser-es5-local # For ES5 browsers that don't support ES6
+    npm run test-browser-es6-local # For ES6 compliant browsers
+
+This will print out a URL that you can then open in a browser to run the tests, using [airtap](https://www.npmjs.com/package/airtap).
+
+To run automated browser tests using Saucelabs, ensure that your `SAUCE_USERNAME` and `SAUCE_ACCESS_KEY` environment variables are set, then run:
+
+    npm test
+
+This is what's run in Travis, to check against various browsers. The list of browsers is kept in the `bin/airtap-es5.yml` and `bin/airtap-es6.yml` files.
+
+## JavaScript Standard Style
+
+This module uses [JavaScript Standard Style](https://github.com/feross/standard).
+
+[![JavaScript Style Guide](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard)
+
+To test that the code conforms to the style, `npm install` and run:
+
+    ./node_modules/.bin/standard
+
+## credit
+
+This was originally forked from [buffer-browserify](https://github.com/toots/buffer-browserify).
+
+## Security Policies and Procedures
+
+The `buffer` team and community take all security bugs in `buffer` seriously. Please see our [security policies and procedures](https://github.com/feross/security) document to learn how to report issues.
+
+## license
+
+MIT. Copyright (C) [Feross Aboukhadijeh](http://feross.org), and other contributors. Originally forked from an MIT-licensed module by Romain Beauxis.
diff --git a/mqtt-backend/node_modules/buffer/index.d.ts b/mqtt-backend/node_modules/buffer/index.d.ts
new file mode 100644
index 0000000..5d1a804
--- /dev/null
+++ b/mqtt-backend/node_modules/buffer/index.d.ts
@@ -0,0 +1,186 @@
+export class Buffer extends Uint8Array {
+    length: number
+    write(string: string, offset?: number, length?: number, encoding?: string): number;
+    toString(encoding?: string, start?: number, end?: number): string;
+    toJSON(): { type: 'Buffer', data: any[] };
+    equals(otherBuffer: Buffer): boolean;
+    compare(otherBuffer: Buffer, targetStart?: number, targetEnd?: number, sourceStart?: number, sourceEnd?: number): number;
+    copy(targetBuffer: Buffer, targetStart?: number, sourceStart?: number, sourceEnd?: number): number;
+    slice(start?: number, end?: number): Buffer;
+    writeUIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeUIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    readUIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readUIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readUInt8(offset: number, noAssert?: boolean): number;
+    readUInt16LE(offset: number, noAssert?: boolean): number;
+    readUInt16BE(offset: number, noAssert?: boolean): number;
+    readUInt32LE(offset: number, noAssert?: boolean): number;
+    readUInt32BE(offset: number, noAssert?: boolean): number;
+    readInt8(offset: number, noAssert?: boolean): number;
+    readInt16LE(offset: number, noAssert?: boolean): number;
+    readInt16BE(offset: number, noAssert?: boolean): number;
+    readInt32LE(offset: number, noAssert?: boolean): number;
+    readInt32BE(offset: number, noAssert?: boolean): number;
+    readFloatLE(offset: number, noAssert?: boolean): number;
+    readFloatBE(offset: number, noAssert?: boolean): number;
+    readDoubleLE(offset: number, noAssert?: boolean): number;
+    readDoubleBE(offset: number, noAssert?: boolean): number;
+    reverse(): this;
+    swap16(): Buffer;
+    swap32(): Buffer;
+    swap64(): Buffer;
+    writeUInt8(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt16LE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt16BE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt32LE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt32BE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt8(value: number, offset: number, noAssert?: boolean): number;
+    writeInt16LE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt16BE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt32LE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt32BE(value: number, offset: number, noAssert?: boolean): number;
+    writeFloatLE(value: number, offset: number, noAssert?: boolean): number;
+    writeFloatBE(value: number, offset: number, noAssert?: boolean): number;
+    writeDoubleLE(value: number, offset: number, noAssert?: boolean): number;
+    writeDoubleBE(value: number, offset: number, noAssert?: boolean): number;
+    fill(value: any, offset?: number, end?: number): this;
+    indexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+    lastIndexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+    includes(value: string | number | Buffer, byteOffset?: number, encoding?: string): boolean;
+
+    /**
+     * Allocates a new buffer containing the given {str}.
+     *
+     * @param str String to store in buffer.
+     * @param encoding encoding to use, optional.  Default is 'utf8'
+     */
+    constructor (str: string, encoding?: string);
+    /**
+     * Allocates a new buffer of {size} octets.
+     *
+     * @param size count of octets to allocate.
+     */
+    constructor (size: number);
+    /**
+     * Allocates a new buffer containing the given {array} of octets.
+     *
+     * @param array The octets to store.
+     */
+    constructor (array: Uint8Array);
+    /**
+     * Produces a Buffer backed by the same allocated memory as
+     * the given {ArrayBuffer}.
+     *
+     *
+     * @param arrayBuffer The ArrayBuffer with which to share memory.
+     */
+    constructor (arrayBuffer: ArrayBuffer);
+    /**
+     * Allocates a new buffer containing the given {array} of octets.
+     *
+     * @param array The octets to store.
+     */
+    constructor (array: any[]);
+    /**
+     * Copies the passed {buffer} data onto a new {Buffer} instance.
+     *
+     * @param buffer The buffer to copy.
+     */
+    constructor (buffer: Buffer);
+    prototype: Buffer;
+    /**
+     * Allocates a new Buffer using an {array} of octets.
+     *
+     * @param array
+     */
+    static from(array: any[]): Buffer;
+    /**
+     * When passed a reference to the .buffer property of a TypedArray instance,
+     * the newly created Buffer will share the same allocated memory as the TypedArray.
+     * The optional {byteOffset} and {length} arguments specify a memory range
+     * within the {arrayBuffer} that will be shared by the Buffer.
+     *
+     * @param arrayBuffer The .buffer property of a TypedArray or a new ArrayBuffer()
+     * @param byteOffset
+     * @param length
+     */
+    static from(arrayBuffer: ArrayBuffer, byteOffset?: number, length?: number): Buffer;
+    /**
+     * Copies the passed {buffer} data onto a new Buffer instance.
+     *
+     * @param buffer
+     */
+    static from(buffer: Buffer | Uint8Array): Buffer;
+    /**
+     * Creates a new Buffer containing the given JavaScript string {str}.
+     * If provided, the {encoding} parameter identifies the character encoding.
+     * If not provided, {encoding} defaults to 'utf8'.
+     *
+     * @param str
+     */
+    static from(str: string, encoding?: string): Buffer;
+    /**
+     * Returns true if {obj} is a Buffer
+     *
+     * @param obj object to test.
+     */
+    static isBuffer(obj: any): obj is Buffer;
+    /**
+     * Returns true if {encoding} is a valid encoding argument.
+     * Valid string encodings in Node 0.12: 'ascii'|'utf8'|'utf16le'|'ucs2'(alias of 'utf16le')|'base64'|'binary'(deprecated)|'hex'
+     *
+     * @param encoding string to test.
+     */
+    static isEncoding(encoding: string): boolean;
+    /**
+     * Gives the actual byte length of a string. encoding defaults to 'utf8'.
+     * This is not the same as String.prototype.length since that returns the number of characters in a string.
+     *
+     * @param string string to test.
+     * @param encoding encoding used to evaluate (defaults to 'utf8')
+     */
+    static byteLength(string: string, encoding?: string): number;
+    /**
+     * Returns a buffer which is the result of concatenating all the buffers in the list together.
+     *
+     * If the list has no items, or if the totalLength is 0, then it returns a zero-length buffer.
+     * If the list has exactly one item, then the first item of the list is returned.
+     * If the list has more than one item, then a new Buffer is created.
+     *
+     * @param list An array of Buffer objects to concatenate
+     * @param totalLength Total length of the buffers when concatenated.
+     *   If totalLength is not provided, it is read from the buffers in the list. However, this adds an additional loop to the function, so it is faster to provide the length explicitly.
+     */
+    static concat(list: Buffer[], totalLength?: number): Buffer;
+    /**
+     * The same as buf1.compare(buf2).
+     */
+    static compare(buf1: Buffer, buf2: Buffer): number;
+    /**
+     * Allocates a new buffer of {size} octets.
+     *
+     * @param size count of octets to allocate.
+     * @param fill if specified, buffer will be initialized by calling buf.fill(fill).
+     *    If parameter is omitted, buffer will be filled with zeros.
+     * @param encoding encoding used for call to buf.fill while initializing
+     */
+    static alloc(size: number, fill?: string | Buffer | number, encoding?: string): Buffer;
+    /**
+     * Allocates a new buffer of {size} octets, leaving memory not initialized, so the contents
+     * of the newly created Buffer are unknown and may contain sensitive data.
+     *
+     * @param size count of octets to allocate
+     */
+    static allocUnsafe(size: number): Buffer;
+    /**
+     * Allocates a new non-pooled buffer of {size} octets, leaving memory not initialized, so the contents
+     * of the newly created Buffer are unknown and may contain sensitive data.
+     *
+     * @param size count of octets to allocate
+     */
+    static allocUnsafeSlow(size: number): Buffer;
+}
diff --git a/mqtt-backend/node_modules/buffer/index.js b/mqtt-backend/node_modules/buffer/index.js
new file mode 100644
index 0000000..609cf31
--- /dev/null
+++ b/mqtt-backend/node_modules/buffer/index.js
@@ -0,0 +1,1817 @@
+/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <https://feross.org>
+ * @license  MIT
+ */
+/* eslint-disable no-proto */
+
+'use strict'
+
+var base64 = require('base64-js')
+var ieee754 = require('ieee754')
+var customInspectSymbol =
+  (typeof Symbol === 'function' && typeof Symbol['for'] === 'function') // eslint-disable-line dot-notation
+    ? Symbol['for']('nodejs.util.inspect.custom') // eslint-disable-line dot-notation
+    : null
+
+exports.Buffer = Buffer
+exports.SlowBuffer = SlowBuffer
+exports.INSPECT_MAX_BYTES = 50
+
+var K_MAX_LENGTH = 0x7fffffff
+exports.kMaxLength = K_MAX_LENGTH
+
+/**
+ * If `Buffer.TYPED_ARRAY_SUPPORT`:
+ *   === true    Use Uint8Array implementation (fastest)
+ *   === false   Print warning and recommend using `buffer` v4.x which has an Object
+ *               implementation (most compatible, even IE6)
+ *
+ * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
+ * Opera 11.6+, iOS 4.2+.
+ *
+ * We report that the browser does not support typed arrays if the are not subclassable
+ * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
+ * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
+ * for __proto__ and has a buggy typed array implementation.
+ */
+Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()
+
+if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
+    typeof console.error === 'function') {
+  console.error(
+    'This browser lacks typed array (Uint8Array) support which is required by ' +
+    '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
+  )
+}
+
+function typedArraySupport () {
+  // Can typed array instances can be augmented?
+  try {
+    var arr = new Uint8Array(1)
+    var proto = { foo: function () { return 42 } }
+    Object.setPrototypeOf(proto, Uint8Array.prototype)
+    Object.setPrototypeOf(arr, proto)
+    return arr.foo() === 42
+  } catch (e) {
+    return false
+  }
+}
+
+Object.defineProperty(Buffer.prototype, 'parent', {
+  enumerable: true,
+  get: function () {
+    if (!Buffer.isBuffer(this)) return undefined
+    return this.buffer
+  }
+})
+
+Object.defineProperty(Buffer.prototype, 'offset', {
+  enumerable: true,
+  get: function () {
+    if (!Buffer.isBuffer(this)) return undefined
+    return this.byteOffset
+  }
+})
+
+function createBuffer (length) {
+  if (length > K_MAX_LENGTH) {
+    throw new RangeError('The value "' + length + '" is invalid for option "size"')
+  }
+  // Return an augmented `Uint8Array` instance
+  var buf = new Uint8Array(length)
+  Object.setPrototypeOf(buf, Buffer.prototype)
+  return buf
+}
+
+/**
+ * The Buffer constructor returns instances of `Uint8Array` that have their
+ * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
+ * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
+ * and the `Uint8Array` methods. Square bracket notation works as expected -- it
+ * returns a single octet.
+ *
+ * The `Uint8Array` prototype remains unmodified.
+ */
+
+function Buffer (arg, encodingOrOffset, length) {
+  // Common case.
+  if (typeof arg === 'number') {
+    if (typeof encodingOrOffset === 'string') {
+      throw new TypeError(
+        'The "string" argument must be of type string. Received type number'
+      )
+    }
+    return allocUnsafe(arg)
+  }
+  return from(arg, encodingOrOffset, length)
+}
+
+Buffer.poolSize = 8192 // not used by this implementation
+
+function from (value, encodingOrOffset, length) {
+  if (typeof value === 'string') {
+    return fromString(value, encodingOrOffset)
+  }
+
+  if (ArrayBuffer.isView(value)) {
+    return fromArrayView(value)
+  }
+
+  if (value == null) {
+    throw new TypeError(
+      'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
+      'or Array-like Object. Received type ' + (typeof value)
+    )
+  }
+
+  if (isInstance(value, ArrayBuffer) ||
+      (value && isInstance(value.buffer, ArrayBuffer))) {
+    return fromArrayBuffer(value, encodingOrOffset, length)
+  }
+
+  if (typeof SharedArrayBuffer !== 'undefined' &&
+      (isInstance(value, SharedArrayBuffer) ||
+      (value && isInstance(value.buffer, SharedArrayBuffer)))) {
+    return fromArrayBuffer(value, encodingOrOffset, length)
+  }
+
+  if (typeof value === 'number') {
+    throw new TypeError(
+      'The "value" argument must not be of type number. Received type number'
+    )
+  }
+
+  var valueOf = value.valueOf && value.valueOf()
+  if (valueOf != null && valueOf !== value) {
+    return Buffer.from(valueOf, encodingOrOffset, length)
+  }
+
+  var b = fromObject(value)
+  if (b) return b
+
+  if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
+      typeof value[Symbol.toPrimitive] === 'function') {
+    return Buffer.from(
+      value[Symbol.toPrimitive]('string'), encodingOrOffset, length
+    )
+  }
+
+  throw new TypeError(
+    'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
+    'or Array-like Object. Received type ' + (typeof value)
+  )
+}
+
+/**
+ * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
+ * if value is a number.
+ * Buffer.from(str[, encoding])
+ * Buffer.from(array)
+ * Buffer.from(buffer)
+ * Buffer.from(arrayBuffer[, byteOffset[, length]])
+ **/
+Buffer.from = function (value, encodingOrOffset, length) {
+  return from(value, encodingOrOffset, length)
+}
+
+// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
+// https://github.com/feross/buffer/pull/148
+Object.setPrototypeOf(Buffer.prototype, Uint8Array.prototype)
+Object.setPrototypeOf(Buffer, Uint8Array)
+
+function assertSize (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('"size" argument must be of type number')
+  } else if (size < 0) {
+    throw new RangeError('The value "' + size + '" is invalid for option "size"')
+  }
+}
+
+function alloc (size, fill, encoding) {
+  assertSize(size)
+  if (size <= 0) {
+    return createBuffer(size)
+  }
+  if (fill !== undefined) {
+    // Only pay attention to encoding if it's a string. This
+    // prevents accidentally sending in a number that would
+    // be interpreted as a start offset.
+    return typeof encoding === 'string'
+      ? createBuffer(size).fill(fill, encoding)
+      : createBuffer(size).fill(fill)
+  }
+  return createBuffer(size)
+}
+
+/**
+ * Creates a new filled Buffer instance.
+ * alloc(size[, fill[, encoding]])
+ **/
+Buffer.alloc = function (size, fill, encoding) {
+  return alloc(size, fill, encoding)
+}
+
+function allocUnsafe (size) {
+  assertSize(size)
+  return createBuffer(size < 0 ? 0 : checked(size) | 0)
+}
+
+/**
+ * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
+ * */
+Buffer.allocUnsafe = function (size) {
+  return allocUnsafe(size)
+}
+/**
+ * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
+ */
+Buffer.allocUnsafeSlow = function (size) {
+  return allocUnsafe(size)
+}
+
+function fromString (string, encoding) {
+  if (typeof encoding !== 'string' || encoding === '') {
+    encoding = 'utf8'
+  }
+
+  if (!Buffer.isEncoding(encoding)) {
+    throw new TypeError('Unknown encoding: ' + encoding)
+  }
+
+  var length = byteLength(string, encoding) | 0
+  var buf = createBuffer(length)
+
+  var actual = buf.write(string, encoding)
+
+  if (actual !== length) {
+    // Writing a hex string, for example, that contains invalid characters will
+    // cause everything after the first invalid character to be ignored. (e.g.
+    // 'abxxcd' will be treated as 'ab')
+    buf = buf.slice(0, actual)
+  }
+
+  return buf
+}
+
+function fromArrayLike (array) {
+  var length = array.length < 0 ? 0 : checked(array.length) | 0
+  var buf = createBuffer(length)
+  for (var i = 0; i < length; i += 1) {
+    buf[i] = array[i] & 255
+  }
+  return buf
+}
+
+function fromArrayView (arrayView) {
+  if (isInstance(arrayView, Uint8Array)) {
+    var copy = new Uint8Array(arrayView)
+    return fromArrayBuffer(copy.buffer, copy.byteOffset, copy.byteLength)
+  }
+  return fromArrayLike(arrayView)
+}
+
+function fromArrayBuffer (array, byteOffset, length) {
+  if (byteOffset < 0 || array.byteLength < byteOffset) {
+    throw new RangeError('"offset" is outside of buffer bounds')
+  }
+
+  if (array.byteLength < byteOffset + (length || 0)) {
+    throw new RangeError('"length" is outside of buffer bounds')
+  }
+
+  var buf
+  if (byteOffset === undefined && length === undefined) {
+    buf = new Uint8Array(array)
+  } else if (length === undefined) {
+    buf = new Uint8Array(array, byteOffset)
+  } else {
+    buf = new Uint8Array(array, byteOffset, length)
+  }
+
+  // Return an augmented `Uint8Array` instance
+  Object.setPrototypeOf(buf, Buffer.prototype)
+
+  return buf
+}
+
+function fromObject (obj) {
+  if (Buffer.isBuffer(obj)) {
+    var len = checked(obj.length) | 0
+    var buf = createBuffer(len)
+
+    if (buf.length === 0) {
+      return buf
+    }
+
+    obj.copy(buf, 0, 0, len)
+    return buf
+  }
+
+  if (obj.length !== undefined) {
+    if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
+      return createBuffer(0)
+    }
+    return fromArrayLike(obj)
+  }
+
+  if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
+    return fromArrayLike(obj.data)
+  }
+}
+
+function checked (length) {
+  // Note: cannot use `length < K_MAX_LENGTH` here because that fails when
+  // length is NaN (which is otherwise coerced to zero.)
+  if (length >= K_MAX_LENGTH) {
+    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
+                         'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
+  }
+  return length | 0
+}
+
+function SlowBuffer (length) {
+  if (+length != length) { // eslint-disable-line eqeqeq
+    length = 0
+  }
+  return Buffer.alloc(+length)
+}
+
+Buffer.isBuffer = function isBuffer (b) {
+  return b != null && b._isBuffer === true &&
+    b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false
+}
+
+Buffer.compare = function compare (a, b) {
+  if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength)
+  if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength)
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+    throw new TypeError(
+      'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
+    )
+  }
+
+  if (a === b) return 0
+
+  var x = a.length
+  var y = b.length
+
+  for (var i = 0, len = Math.min(x, y); i < len; ++i) {
+    if (a[i] !== b[i]) {
+      x = a[i]
+      y = b[i]
+      break
+    }
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
+}
+
+Buffer.isEncoding = function isEncoding (encoding) {
+  switch (String(encoding).toLowerCase()) {
+    case 'hex':
+    case 'utf8':
+    case 'utf-8':
+    case 'ascii':
+    case 'latin1':
+    case 'binary':
+    case 'base64':
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      return true
+    default:
+      return false
+  }
+}
+
+Buffer.concat = function concat (list, length) {
+  if (!Array.isArray(list)) {
+    throw new TypeError('"list" argument must be an Array of Buffers')
+  }
+
+  if (list.length === 0) {
+    return Buffer.alloc(0)
+  }
+
+  var i
+  if (length === undefined) {
+    length = 0
+    for (i = 0; i < list.length; ++i) {
+      length += list[i].length
+    }
+  }
+
+  var buffer = Buffer.allocUnsafe(length)
+  var pos = 0
+  for (i = 0; i < list.length; ++i) {
+    var buf = list[i]
+    if (isInstance(buf, Uint8Array)) {
+      if (pos + buf.length > buffer.length) {
+        Buffer.from(buf).copy(buffer, pos)
+      } else {
+        Uint8Array.prototype.set.call(
+          buffer,
+          buf,
+          pos
+        )
+      }
+    } else if (!Buffer.isBuffer(buf)) {
+      throw new TypeError('"list" argument must be an Array of Buffers')
+    } else {
+      buf.copy(buffer, pos)
+    }
+    pos += buf.length
+  }
+  return buffer
+}
+
+function byteLength (string, encoding) {
+  if (Buffer.isBuffer(string)) {
+    return string.length
+  }
+  if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
+    return string.byteLength
+  }
+  if (typeof string !== 'string') {
+    throw new TypeError(
+      'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
+      'Received type ' + typeof string
+    )
+  }
+
+  var len = string.length
+  var mustMatch = (arguments.length > 2 && arguments[2] === true)
+  if (!mustMatch && len === 0) return 0
+
+  // Use a for loop to avoid recursion
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'ascii':
+      case 'latin1':
+      case 'binary':
+        return len
+      case 'utf8':
+      case 'utf-8':
+        return utf8ToBytes(string).length
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return len * 2
+      case 'hex':
+        return len >>> 1
+      case 'base64':
+        return base64ToBytes(string).length
+      default:
+        if (loweredCase) {
+          return mustMatch ? -1 : utf8ToBytes(string).length // assume utf8
+        }
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+Buffer.byteLength = byteLength
+
+function slowToString (encoding, start, end) {
+  var loweredCase = false
+
+  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
+  // property of a typed array.
+
+  // This behaves neither like String nor Uint8Array in that we set start/end
+  // to their upper/lower bounds if the value passed is out of range.
+  // undefined is handled specially as per ECMA-262 6th Edition,
+  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
+  if (start === undefined || start < 0) {
+    start = 0
+  }
+  // Return early if start > this.length. Done here to prevent potential uint32
+  // coercion fail below.
+  if (start > this.length) {
+    return ''
+  }
+
+  if (end === undefined || end > this.length) {
+    end = this.length
+  }
+
+  if (end <= 0) {
+    return ''
+  }
+
+  // Force coercion to uint32. This will also coerce falsey/NaN values to 0.
+  end >>>= 0
+  start >>>= 0
+
+  if (end <= start) {
+    return ''
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  while (true) {
+    switch (encoding) {
+      case 'hex':
+        return hexSlice(this, start, end)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Slice(this, start, end)
+
+      case 'ascii':
+        return asciiSlice(this, start, end)
+
+      case 'latin1':
+      case 'binary':
+        return latin1Slice(this, start, end)
+
+      case 'base64':
+        return base64Slice(this, start, end)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return utf16leSlice(this, start, end)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = (encoding + '').toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
+// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
+// reliably in a browserify context because there could be multiple different
+// copies of the 'buffer' package in use. This method works even for Buffer
+// instances that were created from another copy of the `buffer` package.
+// See: https://github.com/feross/buffer/issues/154
+Buffer.prototype._isBuffer = true
+
+function swap (b, n, m) {
+  var i = b[n]
+  b[n] = b[m]
+  b[m] = i
+}
+
+Buffer.prototype.swap16 = function swap16 () {
+  var len = this.length
+  if (len % 2 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 16-bits')
+  }
+  for (var i = 0; i < len; i += 2) {
+    swap(this, i, i + 1)
+  }
+  return this
+}
+
+Buffer.prototype.swap32 = function swap32 () {
+  var len = this.length
+  if (len % 4 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 32-bits')
+  }
+  for (var i = 0; i < len; i += 4) {
+    swap(this, i, i + 3)
+    swap(this, i + 1, i + 2)
+  }
+  return this
+}
+
+Buffer.prototype.swap64 = function swap64 () {
+  var len = this.length
+  if (len % 8 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 64-bits')
+  }
+  for (var i = 0; i < len; i += 8) {
+    swap(this, i, i + 7)
+    swap(this, i + 1, i + 6)
+    swap(this, i + 2, i + 5)
+    swap(this, i + 3, i + 4)
+  }
+  return this
+}
+
+Buffer.prototype.toString = function toString () {
+  var length = this.length
+  if (length === 0) return ''
+  if (arguments.length === 0) return utf8Slice(this, 0, length)
+  return slowToString.apply(this, arguments)
+}
+
+Buffer.prototype.toLocaleString = Buffer.prototype.toString
+
+Buffer.prototype.equals = function equals (b) {
+  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
+  if (this === b) return true
+  return Buffer.compare(this, b) === 0
+}
+
+Buffer.prototype.inspect = function inspect () {
+  var str = ''
+  var max = exports.INSPECT_MAX_BYTES
+  str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
+  if (this.length > max) str += ' ... '
+  return '<Buffer ' + str + '>'
+}
+if (customInspectSymbol) {
+  Buffer.prototype[customInspectSymbol] = Buffer.prototype.inspect
+}
+
+Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
+  if (isInstance(target, Uint8Array)) {
+    target = Buffer.from(target, target.offset, target.byteLength)
+  }
+  if (!Buffer.isBuffer(target)) {
+    throw new TypeError(
+      'The "target" argument must be one of type Buffer or Uint8Array. ' +
+      'Received type ' + (typeof target)
+    )
+  }
+
+  if (start === undefined) {
+    start = 0
+  }
+  if (end === undefined) {
+    end = target ? target.length : 0
+  }
+  if (thisStart === undefined) {
+    thisStart = 0
+  }
+  if (thisEnd === undefined) {
+    thisEnd = this.length
+  }
+
+  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
+    throw new RangeError('out of range index')
+  }
+
+  if (thisStart >= thisEnd && start >= end) {
+    return 0
+  }
+  if (thisStart >= thisEnd) {
+    return -1
+  }
+  if (start >= end) {
+    return 1
+  }
+
+  start >>>= 0
+  end >>>= 0
+  thisStart >>>= 0
+  thisEnd >>>= 0
+
+  if (this === target) return 0
+
+  var x = thisEnd - thisStart
+  var y = end - start
+  var len = Math.min(x, y)
+
+  var thisCopy = this.slice(thisStart, thisEnd)
+  var targetCopy = target.slice(start, end)
+
+  for (var i = 0; i < len; ++i) {
+    if (thisCopy[i] !== targetCopy[i]) {
+      x = thisCopy[i]
+      y = targetCopy[i]
+      break
+    }
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
+}
+
+// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
+// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
+//
+// Arguments:
+// - buffer - a Buffer to search
+// - val - a string, Buffer, or number
+// - byteOffset - an index into `buffer`; will be clamped to an int32
+// - encoding - an optional encoding, relevant is val is a string
+// - dir - true for indexOf, false for lastIndexOf
+function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
+  // Empty buffer means no match
+  if (buffer.length === 0) return -1
+
+  // Normalize byteOffset
+  if (typeof byteOffset === 'string') {
+    encoding = byteOffset
+    byteOffset = 0
+  } else if (byteOffset > 0x7fffffff) {
+    byteOffset = 0x7fffffff
+  } else if (byteOffset < -0x80000000) {
+    byteOffset = -0x80000000
+  }
+  byteOffset = +byteOffset // Coerce to Number.
+  if (numberIsNaN(byteOffset)) {
+    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
+    byteOffset = dir ? 0 : (buffer.length - 1)
+  }
+
+  // Normalize byteOffset: negative offsets start from the end of the buffer
+  if (byteOffset < 0) byteOffset = buffer.length + byteOffset
+  if (byteOffset >= buffer.length) {
+    if (dir) return -1
+    else byteOffset = buffer.length - 1
+  } else if (byteOffset < 0) {
+    if (dir) byteOffset = 0
+    else return -1
+  }
+
+  // Normalize val
+  if (typeof val === 'string') {
+    val = Buffer.from(val, encoding)
+  }
+
+  // Finally, search either indexOf (if dir is true) or lastIndexOf
+  if (Buffer.isBuffer(val)) {
+    // Special case: looking for empty string/buffer always fails
+    if (val.length === 0) {
+      return -1
+    }
+    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
+  } else if (typeof val === 'number') {
+    val = val & 0xFF // Search for a byte value [0-255]
+    if (typeof Uint8Array.prototype.indexOf === 'function') {
+      if (dir) {
+        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
+      } else {
+        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
+      }
+    }
+    return arrayIndexOf(buffer, [val], byteOffset, encoding, dir)
+  }
+
+  throw new TypeError('val must be string, number or Buffer')
+}
+
+function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
+  var indexSize = 1
+  var arrLength = arr.length
+  var valLength = val.length
+
+  if (encoding !== undefined) {
+    encoding = String(encoding).toLowerCase()
+    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
+        encoding === 'utf16le' || encoding === 'utf-16le') {
+      if (arr.length < 2 || val.length < 2) {
+        return -1
+      }
+      indexSize = 2
+      arrLength /= 2
+      valLength /= 2
+      byteOffset /= 2
+    }
+  }
+
+  function read (buf, i) {
+    if (indexSize === 1) {
+      return buf[i]
+    } else {
+      return buf.readUInt16BE(i * indexSize)
+    }
+  }
+
+  var i
+  if (dir) {
+    var foundIndex = -1
+    for (i = byteOffset; i < arrLength; i++) {
+      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
+        if (foundIndex === -1) foundIndex = i
+        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
+      } else {
+        if (foundIndex !== -1) i -= i - foundIndex
+        foundIndex = -1
+      }
+    }
+  } else {
+    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
+    for (i = byteOffset; i >= 0; i--) {
+      var found = true
+      for (var j = 0; j < valLength; j++) {
+        if (read(arr, i + j) !== read(val, j)) {
+          found = false
+          break
+        }
+      }
+      if (found) return i
+    }
+  }
+
+  return -1
+}
+
+Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
+  return this.indexOf(val, byteOffset, encoding) !== -1
+}
+
+Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
+}
+
+Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
+}
+
+function hexWrite (buf, string, offset, length) {
+  offset = Number(offset) || 0
+  var remaining = buf.length - offset
+  if (!length) {
+    length = remaining
+  } else {
+    length = Number(length)
+    if (length > remaining) {
+      length = remaining
+    }
+  }
+
+  var strLen = string.length
+
+  if (length > strLen / 2) {
+    length = strLen / 2
+  }
+  for (var i = 0; i < length; ++i) {
+    var parsed = parseInt(string.substr(i * 2, 2), 16)
+    if (numberIsNaN(parsed)) return i
+    buf[offset + i] = parsed
+  }
+  return i
+}
+
+function utf8Write (buf, string, offset, length) {
+  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+function asciiWrite (buf, string, offset, length) {
+  return blitBuffer(asciiToBytes(string), buf, offset, length)
+}
+
+function base64Write (buf, string, offset, length) {
+  return blitBuffer(base64ToBytes(string), buf, offset, length)
+}
+
+function ucs2Write (buf, string, offset, length) {
+  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+Buffer.prototype.write = function write (string, offset, length, encoding) {
+  // Buffer#write(string)
+  if (offset === undefined) {
+    encoding = 'utf8'
+    length = this.length
+    offset = 0
+  // Buffer#write(string, encoding)
+  } else if (length === undefined && typeof offset === 'string') {
+    encoding = offset
+    length = this.length
+    offset = 0
+  // Buffer#write(string, offset[, length][, encoding])
+  } else if (isFinite(offset)) {
+    offset = offset >>> 0
+    if (isFinite(length)) {
+      length = length >>> 0
+      if (encoding === undefined) encoding = 'utf8'
+    } else {
+      encoding = length
+      length = undefined
+    }
+  } else {
+    throw new Error(
+      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
+    )
+  }
+
+  var remaining = this.length - offset
+  if (length === undefined || length > remaining) length = remaining
+
+  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
+    throw new RangeError('Attempt to write outside buffer bounds')
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  var loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'hex':
+        return hexWrite(this, string, offset, length)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Write(this, string, offset, length)
+
+      case 'ascii':
+      case 'latin1':
+      case 'binary':
+        return asciiWrite(this, string, offset, length)
+
+      case 'base64':
+        // Warning: maxLength not taken into account in base64Write
+        return base64Write(this, string, offset, length)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return ucs2Write(this, string, offset, length)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+Buffer.prototype.toJSON = function toJSON () {
+  return {
+    type: 'Buffer',
+    data: Array.prototype.slice.call(this._arr || this, 0)
+  }
+}
+
+function base64Slice (buf, start, end) {
+  if (start === 0 && end === buf.length) {
+    return base64.fromByteArray(buf)
+  } else {
+    return base64.fromByteArray(buf.slice(start, end))
+  }
+}
+
+function utf8Slice (buf, start, end) {
+  end = Math.min(buf.length, end)
+  var res = []
+
+  var i = start
+  while (i < end) {
+    var firstByte = buf[i]
+    var codePoint = null
+    var bytesPerSequence = (firstByte > 0xEF)
+      ? 4
+      : (firstByte > 0xDF)
+          ? 3
+          : (firstByte > 0xBF)
+              ? 2
+              : 1
+
+    if (i + bytesPerSequence <= end) {
+      var secondByte, thirdByte, fourthByte, tempCodePoint
+
+      switch (bytesPerSequence) {
+        case 1:
+          if (firstByte < 0x80) {
+            codePoint = firstByte
+          }
+          break
+        case 2:
+          secondByte = buf[i + 1]
+          if ((secondByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
+            if (tempCodePoint > 0x7F) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 3:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
+            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 4:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          fourthByte = buf[i + 3]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
+            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
+              codePoint = tempCodePoint
+            }
+          }
+      }
+    }
+
+    if (codePoint === null) {
+      // we did not generate a valid codePoint so insert a
+      // replacement char (U+FFFD) and advance only 1 byte
+      codePoint = 0xFFFD
+      bytesPerSequence = 1
+    } else if (codePoint > 0xFFFF) {
+      // encode to utf16 (surrogate pair dance)
+      codePoint -= 0x10000
+      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
+      codePoint = 0xDC00 | codePoint & 0x3FF
+    }
+
+    res.push(codePoint)
+    i += bytesPerSequence
+  }
+
+  return decodeCodePointsArray(res)
+}
+
+// Based on http://stackoverflow.com/a/22747272/680742, the browser with
+// the lowest limit is Chrome, with 0x10000 args.
+// We go 1 magnitude less, for safety
+var MAX_ARGUMENTS_LENGTH = 0x1000
+
+function decodeCodePointsArray (codePoints) {
+  var len = codePoints.length
+  if (len <= MAX_ARGUMENTS_LENGTH) {
+    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
+  }
+
+  // Decode in chunks to avoid "call stack size exceeded".
+  var res = ''
+  var i = 0
+  while (i < len) {
+    res += String.fromCharCode.apply(
+      String,
+      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
+    )
+  }
+  return res
+}
+
+function asciiSlice (buf, start, end) {
+  var ret = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i] & 0x7F)
+  }
+  return ret
+}
+
+function latin1Slice (buf, start, end) {
+  var ret = ''
+  end = Math.min(buf.length, end)
+
+  for (var i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i])
+  }
+  return ret
+}
+
+function hexSlice (buf, start, end) {
+  var len = buf.length
+
+  if (!start || start < 0) start = 0
+  if (!end || end < 0 || end > len) end = len
+
+  var out = ''
+  for (var i = start; i < end; ++i) {
+    out += hexSliceLookupTable[buf[i]]
+  }
+  return out
+}
+
+function utf16leSlice (buf, start, end) {
+  var bytes = buf.slice(start, end)
+  var res = ''
+  // If bytes.length is odd, the last 8 bits must be ignored (same as node.js)
+  for (var i = 0; i < bytes.length - 1; i += 2) {
+    res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
+  }
+  return res
+}
+
+Buffer.prototype.slice = function slice (start, end) {
+  var len = this.length
+  start = ~~start
+  end = end === undefined ? len : ~~end
+
+  if (start < 0) {
+    start += len
+    if (start < 0) start = 0
+  } else if (start > len) {
+    start = len
+  }
+
+  if (end < 0) {
+    end += len
+    if (end < 0) end = 0
+  } else if (end > len) {
+    end = len
+  }
+
+  if (end < start) end = start
+
+  var newBuf = this.subarray(start, end)
+  // Return an augmented `Uint8Array` instance
+  Object.setPrototypeOf(newBuf, Buffer.prototype)
+
+  return newBuf
+}
+
+/*
+ * Need to make sure that buffer isn't trying to write out of bounds.
+ */
+function checkOffset (offset, ext, length) {
+  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
+  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
+}
+
+Buffer.prototype.readUintLE =
+Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var val = this[offset]
+  var mul = 1
+  var i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUintBE =
+Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    checkOffset(offset, byteLength, this.length)
+  }
+
+  var val = this[offset + --byteLength]
+  var mul = 1
+  while (byteLength > 0 && (mul *= 0x100)) {
+    val += this[offset + --byteLength] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUint8 =
+Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  return this[offset]
+}
+
+Buffer.prototype.readUint16LE =
+Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return this[offset] | (this[offset + 1] << 8)
+}
+
+Buffer.prototype.readUint16BE =
+Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return (this[offset] << 8) | this[offset + 1]
+}
+
+Buffer.prototype.readUint32LE =
+Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return ((this[offset]) |
+      (this[offset + 1] << 8) |
+      (this[offset + 2] << 16)) +
+      (this[offset + 3] * 0x1000000)
+}
+
+Buffer.prototype.readUint32BE =
+Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] * 0x1000000) +
+    ((this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    this[offset + 3])
+}
+
+Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var val = this[offset]
+  var mul = 1
+  var i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  var i = byteLength
+  var mul = 1
+  var val = this[offset + --i]
+  while (i > 0 && (mul *= 0x100)) {
+    val += this[offset + --i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  if (!(this[offset] & 0x80)) return (this[offset])
+  return ((0xff - this[offset] + 1) * -1)
+}
+
+Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  var val = this[offset] | (this[offset + 1] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  var val = this[offset + 1] | (this[offset] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset]) |
+    (this[offset + 1] << 8) |
+    (this[offset + 2] << 16) |
+    (this[offset + 3] << 24)
+}
+
+Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] << 24) |
+    (this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    (this[offset + 3])
+}
+
+Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, true, 23, 4)
+}
+
+Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, false, 23, 4)
+}
+
+Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, true, 52, 8)
+}
+
+Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, false, 52, 8)
+}
+
+function checkInt (buf, value, offset, ext, max, min) {
+  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
+  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+}
+
+Buffer.prototype.writeUintLE =
+Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    var maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
+  }
+
+  var mul = 1
+  var i = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUintBE =
+Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    var maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
+  }
+
+  var i = byteLength - 1
+  var mul = 1
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUint8 =
+Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
+  this[offset] = (value & 0xff)
+  return offset + 1
+}
+
+Buffer.prototype.writeUint16LE =
+Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
+
+Buffer.prototype.writeUint16BE =
+Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
+
+Buffer.prototype.writeUint32LE =
+Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset + 3] = (value >>> 24)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 1] = (value >>> 8)
+  this[offset] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeUint32BE =
+Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    var limit = Math.pow(2, (8 * byteLength) - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  var i = 0
+  var mul = 1
+  var sub = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    var limit = Math.pow(2, (8 * byteLength) - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  var i = byteLength - 1
+  var mul = 1
+  var sub = 0
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
+  if (value < 0) value = 0xff + value + 1
+  this[offset] = (value & 0xff)
+  return offset + 1
+}
+
+Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
+
+Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
+
+Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 3] = (value >>> 24)
+  return offset + 4
+}
+
+Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  if (value < 0) value = 0xffffffff + value + 1
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
+
+function checkIEEE754 (buf, value, offset, ext, max, min) {
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+  if (offset < 0) throw new RangeError('Index out of range')
+}
+
+function writeFloat (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 23, 4)
+  return offset + 4
+}
+
+Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, false, noAssert)
+}
+
+function writeDouble (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 52, 8)
+  return offset + 8
+}
+
+Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, false, noAssert)
+}
+
+// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
+Buffer.prototype.copy = function copy (target, targetStart, start, end) {
+  if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
+  if (!start) start = 0
+  if (!end && end !== 0) end = this.length
+  if (targetStart >= target.length) targetStart = target.length
+  if (!targetStart) targetStart = 0
+  if (end > 0 && end < start) end = start
+
+  // Copy 0 bytes; we're done
+  if (end === start) return 0
+  if (target.length === 0 || this.length === 0) return 0
+
+  // Fatal error conditions
+  if (targetStart < 0) {
+    throw new RangeError('targetStart out of bounds')
+  }
+  if (start < 0 || start >= this.length) throw new RangeError('Index out of range')
+  if (end < 0) throw new RangeError('sourceEnd out of bounds')
+
+  // Are we oob?
+  if (end > this.length) end = this.length
+  if (target.length - targetStart < end - start) {
+    end = target.length - targetStart + start
+  }
+
+  var len = end - start
+
+  if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
+    // Use built-in when available, missing from IE11
+    this.copyWithin(targetStart, start, end)
+  } else {
+    Uint8Array.prototype.set.call(
+      target,
+      this.subarray(start, end),
+      targetStart
+    )
+  }
+
+  return len
+}
+
+// Usage:
+//    buffer.fill(number[, offset[, end]])
+//    buffer.fill(buffer[, offset[, end]])
+//    buffer.fill(string[, offset[, end]][, encoding])
+Buffer.prototype.fill = function fill (val, start, end, encoding) {
+  // Handle string cases:
+  if (typeof val === 'string') {
+    if (typeof start === 'string') {
+      encoding = start
+      start = 0
+      end = this.length
+    } else if (typeof end === 'string') {
+      encoding = end
+      end = this.length
+    }
+    if (encoding !== undefined && typeof encoding !== 'string') {
+      throw new TypeError('encoding must be a string')
+    }
+    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
+      throw new TypeError('Unknown encoding: ' + encoding)
+    }
+    if (val.length === 1) {
+      var code = val.charCodeAt(0)
+      if ((encoding === 'utf8' && code < 128) ||
+          encoding === 'latin1') {
+        // Fast path: If `val` fits into a single byte, use that numeric value.
+        val = code
+      }
+    }
+  } else if (typeof val === 'number') {
+    val = val & 255
+  } else if (typeof val === 'boolean') {
+    val = Number(val)
+  }
+
+  // Invalid ranges are not set to a default, so can range check early.
+  if (start < 0 || this.length < start || this.length < end) {
+    throw new RangeError('Out of range index')
+  }
+
+  if (end <= start) {
+    return this
+  }
+
+  start = start >>> 0
+  end = end === undefined ? this.length : end >>> 0
+
+  if (!val) val = 0
+
+  var i
+  if (typeof val === 'number') {
+    for (i = start; i < end; ++i) {
+      this[i] = val
+    }
+  } else {
+    var bytes = Buffer.isBuffer(val)
+      ? val
+      : Buffer.from(val, encoding)
+    var len = bytes.length
+    if (len === 0) {
+      throw new TypeError('The value "' + val +
+        '" is invalid for argument "value"')
+    }
+    for (i = 0; i < end - start; ++i) {
+      this[i + start] = bytes[i % len]
+    }
+  }
+
+  return this
+}
+
+// HELPER FUNCTIONS
+// ================
+
+var INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g
+
+function base64clean (str) {
+  // Node takes equal signs as end of the Base64 encoding
+  str = str.split('=')[0]
+  // Node strips out invalid characters like \n and \t from the string, base64-js does not
+  str = str.trim().replace(INVALID_BASE64_RE, '')
+  // Node converts strings with length < 2 to ''
+  if (str.length < 2) return ''
+  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
+  while (str.length % 4 !== 0) {
+    str = str + '='
+  }
+  return str
+}
+
+function utf8ToBytes (string, units) {
+  units = units || Infinity
+  var codePoint
+  var length = string.length
+  var leadSurrogate = null
+  var bytes = []
+
+  for (var i = 0; i < length; ++i) {
+    codePoint = string.charCodeAt(i)
+
+    // is surrogate component
+    if (codePoint > 0xD7FF && codePoint < 0xE000) {
+      // last char was a lead
+      if (!leadSurrogate) {
+        // no lead yet
+        if (codePoint > 0xDBFF) {
+          // unexpected trail
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        } else if (i + 1 === length) {
+          // unpaired lead
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        }
+
+        // valid lead
+        leadSurrogate = codePoint
+
+        continue
+      }
+
+      // 2 leads in a row
+      if (codePoint < 0xDC00) {
+        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+        leadSurrogate = codePoint
+        continue
+      }
+
+      // valid surrogate pair
+      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
+    } else if (leadSurrogate) {
+      // valid bmp char, but last char was a lead
+      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+    }
+
+    leadSurrogate = null
+
+    // encode utf8
+    if (codePoint < 0x80) {
+      if ((units -= 1) < 0) break
+      bytes.push(codePoint)
+    } else if (codePoint < 0x800) {
+      if ((units -= 2) < 0) break
+      bytes.push(
+        codePoint >> 0x6 | 0xC0,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x10000) {
+      if ((units -= 3) < 0) break
+      bytes.push(
+        codePoint >> 0xC | 0xE0,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x110000) {
+      if ((units -= 4) < 0) break
+      bytes.push(
+        codePoint >> 0x12 | 0xF0,
+        codePoint >> 0xC & 0x3F | 0x80,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else {
+      throw new Error('Invalid code point')
+    }
+  }
+
+  return bytes
+}
+
+function asciiToBytes (str) {
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    // Node's code seems to be doing this and not & 0x7F..
+    byteArray.push(str.charCodeAt(i) & 0xFF)
+  }
+  return byteArray
+}
+
+function utf16leToBytes (str, units) {
+  var c, hi, lo
+  var byteArray = []
+  for (var i = 0; i < str.length; ++i) {
+    if ((units -= 2) < 0) break
+
+    c = str.charCodeAt(i)
+    hi = c >> 8
+    lo = c % 256
+    byteArray.push(lo)
+    byteArray.push(hi)
+  }
+
+  return byteArray
+}
+
+function base64ToBytes (str) {
+  return base64.toByteArray(base64clean(str))
+}
+
+function blitBuffer (src, dst, offset, length) {
+  for (var i = 0; i < length; ++i) {
+    if ((i + offset >= dst.length) || (i >= src.length)) break
+    dst[i + offset] = src[i]
+  }
+  return i
+}
+
+// ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass
+// the `instanceof` check but they should be treated as of that type.
+// See: https://github.com/feross/buffer/issues/166
+function isInstance (obj, type) {
+  return obj instanceof type ||
+    (obj != null && obj.constructor != null && obj.constructor.name != null &&
+      obj.constructor.name === type.name)
+}
+function numberIsNaN (obj) {
+  // For IE11 support
+  return obj !== obj // eslint-disable-line no-self-compare
+}
+
+// Create lookup table for `toString('hex')`
+// See: https://github.com/feross/buffer/issues/219
+var hexSliceLookupTable = (function () {
+  var alphabet = '0123456789abcdef'
+  var table = new Array(256)
+  for (var i = 0; i < 16; ++i) {
+    var i16 = i * 16
+    for (var j = 0; j < 16; ++j) {
+      table[i16 + j] = alphabet[i] + alphabet[j]
+    }
+  }
+  return table
+})()
diff --git a/mqtt-backend/node_modules/buffer/package.json b/mqtt-backend/node_modules/buffer/package.json
new file mode 100644
index 0000000..3b1b498
--- /dev/null
+++ b/mqtt-backend/node_modules/buffer/package.json
@@ -0,0 +1,96 @@
+{
+  "name": "buffer",
+  "description": "Node.js Buffer API, for the browser",
+  "version": "5.7.1",
+  "author": {
+    "name": "Feross Aboukhadijeh",
+    "email": "feross@feross.org",
+    "url": "https://feross.org"
+  },
+  "bugs": {
+    "url": "https://github.com/feross/buffer/issues"
+  },
+  "contributors": [
+    "Romain Beauxis <toots@rastageeks.org>",
+    "James Halliday <mail@substack.net>"
+  ],
+  "dependencies": {
+    "base64-js": "^1.3.1",
+    "ieee754": "^1.1.13"
+  },
+  "devDependencies": {
+    "airtap": "^3.0.0",
+    "benchmark": "^2.1.4",
+    "browserify": "^17.0.0",
+    "concat-stream": "^2.0.0",
+    "hyperquest": "^2.1.3",
+    "is-buffer": "^2.0.4",
+    "is-nan": "^1.3.0",
+    "split": "^1.0.1",
+    "standard": "*",
+    "tape": "^5.0.1",
+    "through2": "^4.0.2",
+    "uglify-js": "^3.11.3"
+  },
+  "homepage": "https://github.com/feross/buffer",
+  "jspm": {
+    "map": {
+      "./index.js": {
+        "node": "@node/buffer"
+      }
+    }
+  },
+  "keywords": [
+    "arraybuffer",
+    "browser",
+    "browserify",
+    "buffer",
+    "compatible",
+    "dataview",
+    "uint8array"
+  ],
+  "license": "MIT",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/feross/buffer.git"
+  },
+  "scripts": {
+    "perf": "browserify --debug perf/bracket-notation.js > perf/bundle.js && open perf/index.html",
+    "perf-node": "node perf/bracket-notation.js && node perf/concat.js && node perf/copy-big.js && node perf/copy.js && node perf/new-big.js && node perf/new.js && node perf/readDoubleBE.js && node perf/readFloatBE.js && node perf/readUInt32LE.js && node perf/slice.js && node perf/writeFloatBE.js",
+    "size": "browserify -r ./ | uglifyjs -c -m | gzip | wc -c",
+    "test": "standard && node ./bin/test.js",
+    "test-browser-es5": "airtap -- test/*.js",
+    "test-browser-es5-local": "airtap --local -- test/*.js",
+    "test-browser-es6": "airtap -- test/*.js test/node/*.js",
+    "test-browser-es6-local": "airtap --local -- test/*.js test/node/*.js",
+    "test-node": "tape test/*.js test/node/*.js",
+    "update-authors": "./bin/update-authors.sh"
+  },
+  "standard": {
+    "ignore": [
+      "test/node/**/*.js",
+      "test/common.js",
+      "test/_polyfill.js",
+      "perf/**/*.js"
+    ],
+    "globals": [
+      "SharedArrayBuffer"
+    ]
+  },
+  "funding": [
+    {
+      "type": "github",
+      "url": "https://github.com/sponsors/feross"
+    },
+    {
+      "type": "patreon",
+      "url": "https://www.patreon.com/feross"
+    },
+    {
+      "type": "consulting",
+      "url": "https://feross.org/support"
+    }
+  ]
+}
diff --git a/mqtt-backend/node_modules/commist/.github/workflows/ci.yml b/mqtt-backend/node_modules/commist/.github/workflows/ci.yml
new file mode 100644
index 0000000..5fb2d4d
--- /dev/null
+++ b/mqtt-backend/node_modules/commist/.github/workflows/ci.yml
@@ -0,0 +1,27 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [14.x, 16.x, 18.x]
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Use Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Run tests
+        run: |
+          npm run test
diff --git a/mqtt-backend/node_modules/commist/LICENSE b/mqtt-backend/node_modules/commist/LICENSE
new file mode 100644
index 0000000..1873ff0
--- /dev/null
+++ b/mqtt-backend/node_modules/commist/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2022 Matteo Collina
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/commist/README.md b/mqtt-backend/node_modules/commist/README.md
new file mode 100644
index 0000000..64cc26f
--- /dev/null
+++ b/mqtt-backend/node_modules/commist/README.md
@@ -0,0 +1,113 @@
+commist
+=======
+
+Build command line application with multiple commands the easy way.
+To be used with [minimist](http://npm.im/minimist).
+
+```js
+'use strict'
+
+const program = require('commist')()
+const result = program
+  .register('abcd', function(args) {
+    console.log('just do', args)
+  })
+  .register({ command: 'restore', equals: true }, function(args) {
+    console.log('restore', args)
+  })
+  .register('args', function(args) {
+    args = minimist(args)
+    console.log('just do', args)
+  })
+  .register('abcde code', function(args) {
+    console.log('doing something', args)
+  })
+  .register('another command', function(args) {
+    console.log('anothering', args)
+  })
+  .parse(process.argv.splice(2))
+
+if (result) {
+  console.log('no command called, args', result)
+}
+```
+
+To handle `async` operations, use `parseAsync` instead,
+which let you await on registered commands execution.
+
+```js
+'use strict'
+
+const program = require('commist')()
+
+const result = await program
+  .register('abcd', async function(args) {
+    await executeCommand(args)
+    await doOtherStuff()
+  })
+  .parseAsync(process.argv.splice(2))
+
+if (result) {
+  console.log('no command called, args', result)
+}
+```
+
+When calling _commist_ programs, you can abbreviate down to three char
+words. In the above example, these are valid commands:
+
+```
+node example.js abc
+node example.js abc cod
+node example.js anot comm
+```
+
+Moreover, little spelling mistakes are corrected too:
+
+```
+node example.js abcs cod
+```
+
+If you want that the command must be strict equals, you can register the
+command with the json configuration:
+
+```js
+  program.register({ command: 'restore', strict: true }, function(args) {
+    console.log('restore', args)
+  })
+```
+
+If you want to limit the maximum levenshtein distance of your commands,
+you can use `maxDistance: 2`:
+
+```js
+const program = require('commist')()
+const minimist = require('minimist')
+
+const result = program
+  .register('abcd', function(args) {
+    console.log('just do', args)
+  })
+  .register({ command: 'restore', equals: true }, function(args) {
+    console.log('restore', args)
+  })
+  .register('args', function(args) {
+    args = minimist(args)
+    console.log('just do', args)
+  })
+  .register('abcde code', function(args) {
+    console.log('doing something', args)
+  })
+  .register('another command', function(args) {
+    console.log('anothering', args)
+  })
+  .parse(process.argv.splice(2))
+
+if (result) {
+  console.log('no command called, args', result)
+}
+```
+
+License
+-------
+
+MIT
diff --git a/mqtt-backend/node_modules/commist/example.js b/mqtt-backend/node_modules/commist/example.js
new file mode 100644
index 0000000..1e97034
--- /dev/null
+++ b/mqtt-backend/node_modules/commist/example.js
@@ -0,0 +1,26 @@
+'use strict'
+
+const program = require('./')()
+const minimist = require('minimist')
+const result = program
+  .register('abcd', function (args) {
+    console.log('just do', args)
+  })
+  .register({ command: 'restore', strict: true }, function (args) {
+    console.log('restore', args)
+  })
+  .register('args', function (args) {
+    args = minimist(args)
+    console.log('just do', args)
+  })
+  .register('abcde code', function (args) {
+    console.log('doing something', args)
+  })
+  .register('another command', function (args) {
+    console.log('anothering', args)
+  })
+  .parse(process.argv.splice(2))
+
+if (result) {
+  console.log('no command called, args', result)
+}
diff --git a/mqtt-backend/node_modules/commist/index.js b/mqtt-backend/node_modules/commist/index.js
new file mode 100644
index 0000000..446f25f
--- /dev/null
+++ b/mqtt-backend/node_modules/commist/index.js
@@ -0,0 +1,155 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2014-2022 Matteo Collina
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+'use strict'
+
+const leven = require('./leven')
+
+function commist (opts) {
+  opts = opts || {}
+  const commands = []
+  const maxDistance = opts.maxDistance || Infinity
+
+  function lookup (array) {
+    if (typeof array === 'string') { array = array.split(' ') }
+
+    let res = commands.map(function (cmd) {
+      return cmd.match(array)
+    })
+
+    res = res.filter(function (match) {
+      if (match.partsNotMatched !== 0) {
+        return false
+      }
+      return match.distances.reduce(function (acc, curr) {
+        return acc && curr <= maxDistance
+      }, true)
+    })
+
+    res = res.sort(function (a, b) {
+      if (a.inputNotMatched > b.inputNotMatched) { return 1 }
+
+      if (a.inputNotMatched === b.inputNotMatched && a.totalDistance > b.totalDistance) { return 1 }
+
+      return -1
+    })
+
+    res = res.map(function (match) {
+      return match.cmd
+    })
+
+    return res
+  }
+
+  function parse (args) {
+    const matching = lookup(args)
+
+    if (matching.length > 0) {
+      matching[0].call(args)
+
+      // return null to indicate there is nothing left to do
+      return null
+    }
+
+    return args
+  }
+
+  async function parseAsync (args) {
+    const matching = lookup(args)
+
+    if (matching.length > 0) {
+      await matching[0].call(args)
+      // return null to indicate there is nothing left to do
+      return null
+    }
+
+    return args
+  }
+
+  function register (inputCommand, func) {
+    let commandOptions = {
+      command: inputCommand,
+      strict: false,
+      func
+    }
+
+    if (typeof inputCommand === 'object') {
+      commandOptions = Object.assign(commandOptions, inputCommand)
+    }
+
+    const matching = lookup(commandOptions.command)
+
+    matching.forEach(function (match) {
+      if (match.string === commandOptions.command) { throw new Error('command already registered: ' + commandOptions.command) }
+    })
+
+    commands.push(new Command(commandOptions))
+
+    return this
+  }
+
+  return {
+    register,
+    parse,
+    parseAsync,
+    lookup
+  }
+}
+
+function Command (options) {
+  this.string = options.command
+  this.strict = options.strict
+  this.parts = this.string.split(' ')
+  this.length = this.parts.length
+  this.func = options.func
+}
+
+Command.prototype.call = function call (argv) {
+  return this.func(argv.slice(this.length))
+}
+
+Command.prototype.match = function match (string) {
+  return new CommandMatch(this, string)
+}
+
+function CommandMatch (cmd, array) {
+  this.cmd = cmd
+  this.distances = cmd.parts.map(function (elem, i) {
+    if (array[i] !== undefined) {
+      if (cmd.strict) {
+        return elem === array[i] ? 0 : undefined
+      } else {
+        return leven(elem, array[i])
+      }
+    } else { return undefined }
+  }).filter(function (distance, i) {
+    return distance !== undefined && distance < cmd.parts[i].length
+  })
+
+  this.partsNotMatched = cmd.length - this.distances.length
+  this.inputNotMatched = array.length - this.distances.length
+  this.totalDistance = this.distances.reduce(function (acc, i) { return acc + i }, 0)
+}
+
+module.exports = commist
diff --git a/mqtt-backend/node_modules/commist/leven.js b/mqtt-backend/node_modules/commist/leven.js
new file mode 100644
index 0000000..8baf453
--- /dev/null
+++ b/mqtt-backend/node_modules/commist/leven.js
@@ -0,0 +1,91 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) Sindre Sorhus <sindresorhus@gmail.com> (https://sindresorhus.com)
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial
+ * portions of the Software.
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
+ * NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+const array = []
+const characterCodeCache = []
+
+module.exports = function leven (first, second) {
+  if (first === second) {
+    return 0
+  }
+
+  const swap = first
+
+  // Swapping the strings if `a` is longer than `b` so we know which one is the
+  // shortest & which one is the longest
+  if (first.length > second.length) {
+    first = second
+    second = swap
+  }
+
+  let firstLength = first.length
+  let secondLength = second.length
+
+  // Performing suffix trimming:
+  // We can linearly drop suffix common to both strings since they
+  // don't increase distance at all
+  // Note: `~-` is the bitwise way to perform a `- 1` operation
+  while (firstLength > 0 && (first.charCodeAt(~-firstLength) === second.charCodeAt(~-secondLength))) {
+    firstLength--
+    secondLength--
+  }
+
+  // Performing prefix trimming
+  // We can linearly drop prefix common to both strings since they
+  // don't increase distance at all
+  let start = 0
+
+  while (start < firstLength && (first.charCodeAt(start) === second.charCodeAt(start))) {
+    start++
+  }
+
+  firstLength -= start
+  secondLength -= start
+
+  if (firstLength === 0) {
+    return secondLength
+  }
+
+  let bCharacterCode
+  let result
+  let temporary
+  let temporary2
+  let index = 0
+  let index2 = 0
+
+  while (index < firstLength) {
+    characterCodeCache[index] = first.charCodeAt(start + index)
+    array[index] = ++index
+  }
+
+  while (index2 < secondLength) {
+    bCharacterCode = second.charCodeAt(start + index2)
+    temporary = index2++
+    result = index2
+
+    for (index = 0; index < firstLength; index++) {
+      temporary2 = bCharacterCode === characterCodeCache[index] ? temporary : temporary + 1
+      temporary = array[index]
+      // eslint-disable-next-line no-multi-assign
+      result = array[index] = temporary > result ? (temporary2 > result ? result + 1 : temporary2) : (temporary2 > temporary ? temporary + 1 : temporary2)
+    }
+  }
+
+  return result
+}
diff --git a/mqtt-backend/node_modules/commist/package.json b/mqtt-backend/node_modules/commist/package.json
new file mode 100644
index 0000000..6ec4232
--- /dev/null
+++ b/mqtt-backend/node_modules/commist/package.json
@@ -0,0 +1,28 @@
+{
+  "name": "commist",
+  "version": "3.2.0",
+  "description": "Build your commands on minimist!",
+  "main": "index.js",
+  "scripts": {
+    "test": "standard && tape test.js"
+  },
+  "pre-commit": "test",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mcollina/commist.git"
+  },
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mcollina/commist/issues"
+  },
+  "homepage": "https://github.com/mcollina/commist",
+  "dependencies": {
+  },
+  "devDependencies": {
+    "minimist": "^1.1.0",
+    "pre-commit": "^1.0.0",
+    "standard": "^17.0.0",
+    "tape": "^5.0.0"
+  }
+}
diff --git a/mqtt-backend/node_modules/commist/test.js b/mqtt-backend/node_modules/commist/test.js
new file mode 100644
index 0000000..df26130
--- /dev/null
+++ b/mqtt-backend/node_modules/commist/test.js
@@ -0,0 +1,368 @@
+'use strict'
+
+const test = require('tape').test
+
+const commist = require('./')
+const leven = require('./leven')
+
+test('registering a command', function (t) {
+  t.plan(2)
+
+  const program = commist()
+
+  program.register('hello', function (args) {
+    t.deepEqual(args, ['a', '-x', '23'])
+  })
+
+  const result = program.parse(['hello', 'a', '-x', '23'])
+
+  t.notOk(result, 'must return null, the command have been handled')
+})
+
+test('registering two commands', function (t) {
+  t.plan(1)
+
+  const program = commist()
+
+  program.register('hello', function (args) {
+    t.ok(false, 'must pick the right command')
+  })
+
+  program.register('world', function (args) {
+    t.deepEqual(args, ['a', '-x', '23'])
+  })
+
+  program.parse(['world', 'a', '-x', '23'])
+})
+
+test('registering two commands (bis)', function (t) {
+  t.plan(1)
+
+  const program = commist()
+
+  program.register('hello', function (args) {
+    t.deepEqual(args, ['a', '-x', '23'])
+  })
+
+  program.register('world', function (args) {
+    t.ok(false, 'must pick the right command')
+  })
+
+  program.parse(['hello', 'a', '-x', '23'])
+})
+
+test('registering two words commands', function (t) {
+  t.plan(1)
+
+  const program = commist()
+
+  program.register('hello', function (args) {
+    t.ok(false, 'must pick the right command')
+  })
+
+  program.register('hello world', function (args) {
+    t.deepEqual(args, ['a', '-x', '23'])
+  })
+
+  program.parse(['hello', 'world', 'a', '-x', '23'])
+})
+
+test('registering two words commands (bis)', function (t) {
+  t.plan(1)
+
+  const program = commist()
+
+  program.register('hello', function (args) {
+    t.deepEqual(args, ['a', '-x', '23'])
+  })
+
+  program.register('hello world', function (args) {
+    t.ok(false, 'must pick the right command')
+  })
+
+  program.parse(['hello', 'a', '-x', '23'])
+})
+
+test('registering ambiguous commands throws exception', function (t) {
+  const program = commist()
+
+  function noop () {}
+
+  program.register('hello', noop)
+  program.register('hello world', noop)
+  program.register('hello world matteo', noop)
+
+  try {
+    program.register('hello world', noop)
+    t.ok(false, 'must throw if double-registering the same command')
+  } catch (err) {
+  }
+
+  t.end()
+})
+
+test('looking up commands', function (t) {
+  const program = commist()
+
+  function noop1 () {}
+  function noop2 () {}
+  function noop3 () {}
+
+  program.register('hello', noop1)
+  program.register('hello world matteo', noop3)
+  program.register('hello world', noop2)
+
+  t.equal(program.lookup('hello')[0].func, noop1)
+  t.equal(program.lookup('hello world matteo')[0].func, noop3)
+  t.equal(program.lookup('hello world')[0].func, noop2)
+
+  t.end()
+})
+
+test('looking up commands with abbreviations', function (t) {
+  const program = commist()
+
+  function noop1 () {}
+  function noop2 () {}
+  function noop3 () {}
+
+  program.register('hello', noop1)
+  program.register('hello world matteo', noop3)
+  program.register('hello world', noop2)
+
+  t.equal(program.lookup('hel')[0].func, noop1)
+  t.equal(program.lookup('hel wor mat')[0].func, noop3)
+  t.equal(program.lookup('hel wor')[0].func, noop2)
+
+  t.end()
+})
+
+test('looking up strict commands', function (t) {
+  const program = commist()
+
+  function noop1 () {}
+  function noop2 () {}
+
+  program.register({ command: 'restore', strict: true }, noop1)
+  program.register({ command: 'rest', strict: true }, noop2)
+
+  t.equal(program.lookup('restore')[0].func, noop1)
+  t.equal(program.lookup('rest')[0].func, noop2)
+  t.equal(program.lookup('remove')[0], undefined)
+
+  t.end()
+})
+
+test('executing commands from abbreviations', function (t) {
+  t.plan(1)
+
+  const program = commist()
+
+  program.register('hello', function (args) {
+    t.deepEqual(args, ['a', '-x', '23'])
+  })
+
+  program.register('hello world', function (args) {
+    t.ok(false, 'must pick the right command')
+  })
+
+  program.parse(['hel', 'a', '-x', '23'])
+})
+
+test('executing async command', function (t) {
+  t.plan(1)
+
+  const program = commist()
+
+  program.register('hello', async function (args) {
+    t.deepEqual(args, ['a', '-x', '23'])
+  })
+
+  program.parseAsync(['hello', 'a', '-x', '23'])
+})
+
+test('async execution resolves when correctly matched one', function (t) {
+  t.plan(1)
+
+  const program = commist()
+
+  program.register('hello', async function () {
+    return 1337
+  })
+
+  program.parseAsync(['hello', 'a', '-x', '23']).then((result) => {
+    t.equal(result, null)
+  })
+})
+
+test('async execution resolves with args if no commands matched', function (t) {
+  t.plan(1)
+
+  const program = commist()
+
+  program.register('hello', async function () {
+    t.ok(false, 'command should not be picked')
+  })
+
+  program.parseAsync(['whoops', 'a', '-x', '23']).then((args) => {
+    t.deepEqual(args, ['whoops', 'a', '-x', '23'])
+  })
+})
+
+test('async execution should wait intil registered command finishes', function (t) {
+  t.plan(1)
+
+  const program = commist()
+
+  program.register('hello', async function () {
+    const res = await Promise.resolve(42)
+    return res
+  })
+
+  program.parseAsync(['hello', 'a', '-x', '23']).then((result) => {
+    t.equal(result, null)
+  })
+})
+
+test('async execution should work with sync commands', function (t) {
+  t.plan(1)
+
+  const program = commist()
+
+  program.register('hello', function (args) {
+    t.deepEqual(args, ['a', '-x', '23'])
+  })
+
+  program.parseAsync(['hello', 'a', '-x', '23'])
+})
+
+test('sync execution should work with async commands', function (t) {
+  t.plan(1)
+
+  const program = commist()
+
+  program.register('hello', async function (args) {
+    t.deepEqual(args, ['a', '-x', '23'])
+  })
+
+  program.parse(['hello', 'a', '-x', '23'])
+})
+
+test('one char command', function (t) {
+  const program = commist()
+
+  function noop1 () {}
+
+  program.register('h', noop1)
+  t.equal(program.lookup('h')[0].func, noop1)
+
+  t.end()
+})
+
+test('two char command', function (t) {
+  const program = commist()
+
+  function noop1 () {}
+
+  program.register('he', noop1)
+  t.equal(program.lookup('he')[0].func, noop1)
+
+  t.end()
+})
+
+test('a command part must be at least 3 chars', function (t) {
+  const program = commist()
+
+  function noop1 () {}
+
+  program.register('h b', noop1)
+
+  t.equal(program.lookup('h b')[0].func, noop1)
+
+  t.end()
+})
+
+test('short commands match exactly', function (t) {
+  const program = commist()
+
+  function noop1 () {}
+  function noop2 () {}
+
+  program.register('h', noop1)
+  program.register('help', noop2)
+
+  t.equal(program.lookup('h')[0].func, noop1)
+  t.equal(program.lookup('he')[0].func, noop2)
+  t.equal(program.lookup('hel')[0].func, noop2)
+  t.equal(program.lookup('help')[0].func, noop2)
+
+  t.end()
+})
+
+test('leven', function (t) {
+  t.is(leven('a', 'b'), 1)
+  t.is(leven('ab', 'ac'), 1)
+  t.is(leven('ac', 'bc'), 1)
+  t.is(leven('abc', 'axc'), 1)
+  t.is(leven('kitten', 'sitting'), 3)
+  t.is(leven('xabxcdxxefxgx', '1ab2cd34ef5g6'), 6)
+  t.is(leven('cat', 'cow'), 2)
+  t.is(leven('xabxcdxxefxgx', 'abcdefg'), 6)
+  t.is(leven('javawasneat', 'scalaisgreat'), 7)
+  t.is(leven('example', 'samples'), 3)
+  t.is(leven('sturgeon', 'urgently'), 6)
+  t.is(leven('levenshtein', 'frankenstein'), 6)
+  t.is(leven('distance', 'difference'), 5)
+  t.is(leven('因為我是中國人所以我會說中文', '因為我是英國人所以我會說英文'), 2)
+  t.end()
+})
+
+test('max distance', function (t) {
+  const program = commist({ maxDistance: 2 })
+
+  function noop1 () {}
+  function noop2 () {}
+  function noop3 () {}
+
+  program.register('hello', noop1)
+  program.register('hello world matteo', noop3)
+  program.register('hello world', noop2)
+
+  t.equal(program.lookup('hel')[0].func, noop1)
+  t.equal(program.lookup('hel wor mat')[0].func, noop2)
+  t.equal(program.lookup('hello world matt')[0].func, noop3)
+  t.equal(program.lookup('hello wor')[0].func, noop2)
+  t.deepEqual(program.lookup('he wor'), [])
+
+  t.end()
+})
+
+test('help foobar vs start', function (t) {
+  const program = commist({ maxDistance: 2 })
+
+  function noop1 () {}
+  function noop2 () {}
+
+  program.register('help', noop1)
+  program.register('start', noop2)
+
+  t.equal(program.lookup('help')[0].func, noop1)
+  t.deepEqual(program.lookup('help foobar')[0].func, noop1)
+  t.equal(program.lookup('start')[0].func, noop2)
+
+  t.end()
+})
+
+test('registering a command with maxDistance', function (t) {
+  t.plan(2)
+
+  const program = commist({ maxDistance: 2 })
+
+  program.register('hello', function (args) {
+    t.deepEqual(args, ['a', '-x', '23'])
+  })
+
+  const result = program.parse(['hello', 'a', '-x', '23'])
+
+  t.notOk(result, 'must return null, the command have been handled')
+})
diff --git a/mqtt-backend/node_modules/concat-stream/LICENSE b/mqtt-backend/node_modules/concat-stream/LICENSE
new file mode 100644
index 0000000..99c130e
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/LICENSE
@@ -0,0 +1,24 @@
+The MIT License
+
+Copyright (c) 2013 Max Ogden
+
+Permission is hereby granted, free of charge, 
+to any person obtaining a copy of this software and 
+associated documentation files (the "Software"), to 
+deal in the Software without restriction, including 
+without limitation the rights to use, copy, modify, 
+merge, publish, distribute, sublicense, and/or sell 
+copies of the Software, and to permit persons to whom 
+the Software is furnished to do so, 
+subject to the following conditions:
+
+The above copyright notice and this permission notice 
+shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES 
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR 
+ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/index.js b/mqtt-backend/node_modules/concat-stream/index.js
new file mode 100644
index 0000000..dd672a7
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/index.js
@@ -0,0 +1,144 @@
+var Writable = require('readable-stream').Writable
+var inherits = require('inherits')
+var bufferFrom = require('buffer-from')
+
+if (typeof Uint8Array === 'undefined') {
+  var U8 = require('typedarray').Uint8Array
+} else {
+  var U8 = Uint8Array
+}
+
+function ConcatStream(opts, cb) {
+  if (!(this instanceof ConcatStream)) return new ConcatStream(opts, cb)
+
+  if (typeof opts === 'function') {
+    cb = opts
+    opts = {}
+  }
+  if (!opts) opts = {}
+
+  var encoding = opts.encoding
+  var shouldInferEncoding = false
+
+  if (!encoding) {
+    shouldInferEncoding = true
+  } else {
+    encoding =  String(encoding).toLowerCase()
+    if (encoding === 'u8' || encoding === 'uint8') {
+      encoding = 'uint8array'
+    }
+  }
+
+  Writable.call(this, { objectMode: true })
+
+  this.encoding = encoding
+  this.shouldInferEncoding = shouldInferEncoding
+
+  if (cb) this.on('finish', function () { cb(this.getBody()) })
+  this.body = []
+}
+
+module.exports = ConcatStream
+inherits(ConcatStream, Writable)
+
+ConcatStream.prototype._write = function(chunk, enc, next) {
+  this.body.push(chunk)
+  next()
+}
+
+ConcatStream.prototype.inferEncoding = function (buff) {
+  var firstBuffer = buff === undefined ? this.body[0] : buff;
+  if (Buffer.isBuffer(firstBuffer)) return 'buffer'
+  if (typeof Uint8Array !== 'undefined' && firstBuffer instanceof Uint8Array) return 'uint8array'
+  if (Array.isArray(firstBuffer)) return 'array'
+  if (typeof firstBuffer === 'string') return 'string'
+  if (Object.prototype.toString.call(firstBuffer) === "[object Object]") return 'object'
+  return 'buffer'
+}
+
+ConcatStream.prototype.getBody = function () {
+  if (!this.encoding && this.body.length === 0) return []
+  if (this.shouldInferEncoding) this.encoding = this.inferEncoding()
+  if (this.encoding === 'array') return arrayConcat(this.body)
+  if (this.encoding === 'string') return stringConcat(this.body)
+  if (this.encoding === 'buffer') return bufferConcat(this.body)
+  if (this.encoding === 'uint8array') return u8Concat(this.body)
+  return this.body
+}
+
+var isArray = Array.isArray || function (arr) {
+  return Object.prototype.toString.call(arr) == '[object Array]'
+}
+
+function isArrayish (arr) {
+  return /Array\]$/.test(Object.prototype.toString.call(arr))
+}
+
+function isBufferish (p) {
+  return typeof p === 'string' || isArrayish(p) || (p && typeof p.subarray === 'function')
+}
+
+function stringConcat (parts) {
+  var strings = []
+  var needsToString = false
+  for (var i = 0; i < parts.length; i++) {
+    var p = parts[i]
+    if (typeof p === 'string') {
+      strings.push(p)
+    } else if (Buffer.isBuffer(p)) {
+      strings.push(p)
+    } else if (isBufferish(p)) {
+      strings.push(bufferFrom(p))
+    } else {
+      strings.push(bufferFrom(String(p)))
+    }
+  }
+  if (Buffer.isBuffer(parts[0])) {
+    strings = Buffer.concat(strings)
+    strings = strings.toString('utf8')
+  } else {
+    strings = strings.join('')
+  }
+  return strings
+}
+
+function bufferConcat (parts) {
+  var bufs = []
+  for (var i = 0; i < parts.length; i++) {
+    var p = parts[i]
+    if (Buffer.isBuffer(p)) {
+      bufs.push(p)
+    } else if (isBufferish(p)) {
+      bufs.push(bufferFrom(p))
+    } else {
+      bufs.push(bufferFrom(String(p)))
+    }
+  }
+  return Buffer.concat(bufs)
+}
+
+function arrayConcat (parts) {
+  var res = []
+  for (var i = 0; i < parts.length; i++) {
+    res.push.apply(res, parts[i])
+  }
+  return res
+}
+
+function u8Concat (parts) {
+  var len = 0
+  for (var i = 0; i < parts.length; i++) {
+    if (typeof parts[i] === 'string') {
+      parts[i] = bufferFrom(parts[i])
+    }
+    len += parts[i].length
+  }
+  var u8 = new U8(len)
+  for (var i = 0, offset = 0; i < parts.length; i++) {
+    var part = parts[i]
+    for (var j = 0; j < part.length; j++) {
+      u8[offset++] = part[j]
+    }
+  }
+  return u8
+}
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/CONTRIBUTING.md b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/CONTRIBUTING.md
new file mode 100644
index 0000000..f478d58
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/CONTRIBUTING.md
@@ -0,0 +1,38 @@
+# Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+* (a) The contribution was created in whole or in part by me and I
+  have the right to submit it under the open source license
+  indicated in the file; or
+
+* (b) The contribution is based upon previous work that, to the best
+  of my knowledge, is covered under an appropriate open source
+  license and I have the right under that license to submit that
+  work with modifications, whether created in whole or in part
+  by me, under the same open source license (unless I am
+  permitted to submit under a different license), as indicated
+  in the file; or
+
+* (c) The contribution was provided directly to me by some other
+  person who certified (a), (b) or (c) and I have not modified
+  it.
+
+* (d) I understand and agree that this project and the contribution
+  are public and that a record of the contribution (including all
+  personal information I submit with it, including my sign-off) is
+  maintained indefinitely and may be redistributed consistent with
+  this project or the open source license(s) involved.
+
+## Moderation Policy
+
+The [Node.js Moderation Policy] applies to this WG.
+
+## Code of Conduct
+
+The [Node.js Code of Conduct][] applies to this WG.
+
+[Node.js Code of Conduct]:
+https://github.com/nodejs/node/blob/master/CODE_OF_CONDUCT.md
+[Node.js Moderation Policy]:
+https://github.com/nodejs/TSC/blob/master/Moderation-Policy.md
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/GOVERNANCE.md b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/GOVERNANCE.md
new file mode 100644
index 0000000..16ffb93
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/GOVERNANCE.md
@@ -0,0 +1,136 @@
+### Streams Working Group
+
+The Node.js Streams is jointly governed by a Working Group
+(WG)
+that is responsible for high-level guidance of the project.
+
+The WG has final authority over this project including:
+
+* Technical direction
+* Project governance and process (including this policy)
+* Contribution policy
+* GitHub repository hosting
+* Conduct guidelines
+* Maintaining the list of additional Collaborators
+
+For the current list of WG members, see the project
+[README.md](./README.md#current-project-team-members).
+
+### Collaborators
+
+The readable-stream GitHub repository is
+maintained by the WG and additional Collaborators who are added by the
+WG on an ongoing basis.
+
+Individuals making significant and valuable contributions are made
+Collaborators and given commit-access to the project. These
+individuals are identified by the WG and their addition as
+Collaborators is discussed during the WG meeting.
+
+_Note:_ If you make a significant contribution and are not considered
+for commit-access log an issue or contact a WG member directly and it
+will be brought up in the next WG meeting.
+
+Modifications of the contents of the readable-stream repository are
+made on
+a collaborative basis. Anybody with a GitHub account may propose a
+modification via pull request and it will be considered by the project
+Collaborators. All pull requests must be reviewed and accepted by a
+Collaborator with sufficient expertise who is able to take full
+responsibility for the change. In the case of pull requests proposed
+by an existing Collaborator, an additional Collaborator is required
+for sign-off. Consensus should be sought if additional Collaborators
+participate and there is disagreement around a particular
+modification. See _Consensus Seeking Process_ below for further detail
+on the consensus model used for governance.
+
+Collaborators may opt to elevate significant or controversial
+modifications, or modifications that have not found consensus to the
+WG for discussion by assigning the ***WG-agenda*** tag to a pull
+request or issue. The WG should serve as the final arbiter where
+required.
+
+For the current list of Collaborators, see the project
+[README.md](./README.md#members).
+
+### WG Membership
+
+WG seats are not time-limited.  There is no fixed size of the WG.
+However, the expected target is between 6 and 12, to ensure adequate
+coverage of important areas of expertise, balanced with the ability to
+make decisions efficiently.
+
+There is no specific set of requirements or qualifications for WG
+membership beyond these rules.
+
+The WG may add additional members to the WG by unanimous consensus.
+
+A WG member may be removed from the WG by voluntary resignation, or by
+unanimous consensus of all other WG members.
+
+Changes to WG membership should be posted in the agenda, and may be
+suggested as any other agenda item (see "WG Meetings" below).
+
+If an addition or removal is proposed during a meeting, and the full
+WG is not in attendance to participate, then the addition or removal
+is added to the agenda for the subsequent meeting.  This is to ensure
+that all members are given the opportunity to participate in all
+membership decisions.  If a WG member is unable to attend a meeting
+where a planned membership decision is being made, then their consent
+is assumed.
+
+No more than 1/3 of the WG members may be affiliated with the same
+employer.  If removal or resignation of a WG member, or a change of
+employment by a WG member, creates a situation where more than 1/3 of
+the WG membership shares an employer, then the situation must be
+immediately remedied by the resignation or removal of one or more WG
+members affiliated with the over-represented employer(s).
+
+### WG Meetings
+
+The WG meets occasionally on a Google Hangout On Air. A designated moderator
+approved by the WG runs the meeting. Each meeting should be
+published to YouTube.
+
+Items are added to the WG agenda that are considered contentious or
+are modifications of governance, contribution policy, WG membership,
+or release process.
+
+The intention of the agenda is not to approve or review all patches;
+that should happen continuously on GitHub and be handled by the larger
+group of Collaborators.
+
+Any community member or contributor can ask that something be added to
+the next meeting's agenda by logging a GitHub Issue. Any Collaborator,
+WG member or the moderator can add the item to the agenda by adding
+the ***WG-agenda*** tag to the issue.
+
+Prior to each WG meeting the moderator will share the Agenda with
+members of the WG. WG members can add any items they like to the
+agenda at the beginning of each meeting. The moderator and the WG
+cannot veto or remove items.
+
+The WG may invite persons or representatives from certain projects to
+participate in a non-voting capacity.
+
+The moderator is responsible for summarizing the discussion of each
+agenda item and sends it as a pull request after the meeting.
+
+### Consensus Seeking Process
+
+The WG follows a
+[Consensus
+Seeking](http://en.wikipedia.org/wiki/Consensus-seeking_decision-making)
+decision-making model.
+
+When an agenda item has appeared to reach a consensus the moderator
+will ask "Does anyone object?" as a final call for dissent from the
+consensus.
+
+If an agenda item cannot reach a consensus a WG member can call for
+either a closing vote or a vote to table the issue to the next
+meeting. The call for a vote must be seconded by a majority of the WG
+or else the discussion will continue. Simple majority wins.
+
+Note that changes to WG membership require a majority consensus.  See
+"WG Membership" above.
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/LICENSE b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/LICENSE
new file mode 100644
index 0000000..2873b3b
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/LICENSE
@@ -0,0 +1,47 @@
+Node.js is licensed for use as follows:
+
+"""
+Copyright Node.js contributors. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+"""
+
+This license applies to parts of Node.js originating from the
+https://github.com/joyent/node repository:
+
+"""
+Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+"""
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/README.md b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/README.md
new file mode 100644
index 0000000..19117c1
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/README.md
@@ -0,0 +1,106 @@
+# readable-stream
+
+***Node.js core streams for userland*** [![Build Status](https://travis-ci.com/nodejs/readable-stream.svg?branch=master)](https://travis-ci.com/nodejs/readable-stream)
+
+
+[![NPM](https://nodei.co/npm/readable-stream.png?downloads=true&downloadRank=true)](https://nodei.co/npm/readable-stream/)
+[![NPM](https://nodei.co/npm-dl/readable-stream.png?&months=6&height=3)](https://nodei.co/npm/readable-stream/)
+
+
+[![Sauce Test Status](https://saucelabs.com/browser-matrix/readabe-stream.svg)](https://saucelabs.com/u/readabe-stream)
+
+```bash
+npm install --save readable-stream
+```
+
+This package is a mirror of the streams implementations in Node.js.
+
+Full documentation may be found on the [Node.js website](https://nodejs.org/dist/v10.18.1/docs/api/stream.html).
+
+If you want to guarantee a stable streams base, regardless of what version of
+Node you, or the users of your libraries are using, use **readable-stream** *only* and avoid the *"stream"* module in Node-core, for background see [this blogpost](http://r.va.gg/2014/06/why-i-dont-use-nodes-core-stream-module.html).
+
+As of version 2.0.0 **readable-stream** uses semantic versioning.
+
+## Version 3.x.x
+
+v3.x.x of `readable-stream` is a cut from Node 10. This version supports Node 6, 8, and 10, as well as evergreen browsers, IE 11 and latest Safari. The breaking changes introduced by v3 are composed by the combined breaking changes in [Node v9](https://nodejs.org/en/blog/release/v9.0.0/) and [Node v10](https://nodejs.org/en/blog/release/v10.0.0/), as follows:
+
+1. Error codes: https://github.com/nodejs/node/pull/13310,
+   https://github.com/nodejs/node/pull/13291,
+   https://github.com/nodejs/node/pull/16589,
+   https://github.com/nodejs/node/pull/15042,
+   https://github.com/nodejs/node/pull/15665,
+   https://github.com/nodejs/readable-stream/pull/344
+2. 'readable' have precedence over flowing
+   https://github.com/nodejs/node/pull/18994
+3. make virtual methods errors consistent
+   https://github.com/nodejs/node/pull/18813
+4. updated streams error handling
+   https://github.com/nodejs/node/pull/18438
+5. writable.end should return this.
+   https://github.com/nodejs/node/pull/18780
+6. readable continues to read when push('')
+   https://github.com/nodejs/node/pull/18211
+7. add custom inspect to BufferList
+   https://github.com/nodejs/node/pull/17907
+8. always defer 'readable' with nextTick
+   https://github.com/nodejs/node/pull/17979
+
+## Version 2.x.x
+v2.x.x of `readable-stream` is a cut of the stream module from Node 8 (there have been no semver-major changes from Node 4 to 8). This version supports all Node.js versions from 0.8, as well as evergreen browsers and IE 10 & 11.
+
+### Big Thanks
+
+Cross-browser Testing Platform and Open Source <3 Provided by [Sauce Labs][sauce]
+
+# Usage
+
+You can swap your `require('stream')` with `require('readable-stream')`
+without any changes, if you are just using one of the main classes and
+functions.
+
+```js
+const {
+  Readable,
+  Writable,
+  Transform,
+  Duplex,
+  pipeline,
+  finished
+} = require('readable-stream')
+````
+
+Note that `require('stream')` will return `Stream`, while
+`require('readable-stream')` will return `Readable`. We discourage using
+whatever is exported directly, but rather use one of the properties as
+shown in the example above.
+
+# Streams Working Group
+
+`readable-stream` is maintained by the Streams Working Group, which
+oversees the development and maintenance of the Streams API within
+Node.js. The responsibilities of the Streams Working Group include:
+
+* Addressing stream issues on the Node.js issue tracker.
+* Authoring and editing stream documentation within the Node.js project.
+* Reviewing changes to stream subclasses within the Node.js project.
+* Redirecting changes to streams from the Node.js project to this
+  project.
+* Assisting in the implementation of stream providers within Node.js.
+* Recommending versions of `readable-stream` to be included in Node.js.
+* Messaging about the future of streams to give the community advance
+  notice of changes.
+
+<a name="members"></a>
+## Team Members
+
+* **Calvin Metcalf** ([@calvinmetcalf](https://github.com/calvinmetcalf)) &lt;calvin.metcalf@gmail.com&gt;
+  - Release GPG key: F3EF5F62A87FC27A22E643F714CE4FF5015AA242
+* **Mathias Buus** ([@mafintosh](https://github.com/mafintosh)) &lt;mathiasbuus@gmail.com&gt;
+* **Matteo Collina** ([@mcollina](https://github.com/mcollina)) &lt;matteo.collina@gmail.com&gt;
+  - Release GPG key: 3ABC01543F22DD2239285CDD818674489FBC127E
+* **Irina Shestak** ([@lrlna](https://github.com/lrlna)) &lt;shestak.irina@gmail.com&gt;
+* **Yoshua Wyuts** ([@yoshuawuyts](https://github.com/yoshuawuyts)) &lt;yoshuawuyts@gmail.com&gt;
+
+[sauce]: https://saucelabs.com
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/errors-browser.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/errors-browser.js
new file mode 100644
index 0000000..fb8e73e
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/errors-browser.js
@@ -0,0 +1,127 @@
+'use strict';
+
+function _inheritsLoose(subClass, superClass) { subClass.prototype = Object.create(superClass.prototype); subClass.prototype.constructor = subClass; subClass.__proto__ = superClass; }
+
+var codes = {};
+
+function createErrorType(code, message, Base) {
+  if (!Base) {
+    Base = Error;
+  }
+
+  function getMessage(arg1, arg2, arg3) {
+    if (typeof message === 'string') {
+      return message;
+    } else {
+      return message(arg1, arg2, arg3);
+    }
+  }
+
+  var NodeError =
+  /*#__PURE__*/
+  function (_Base) {
+    _inheritsLoose(NodeError, _Base);
+
+    function NodeError(arg1, arg2, arg3) {
+      return _Base.call(this, getMessage(arg1, arg2, arg3)) || this;
+    }
+
+    return NodeError;
+  }(Base);
+
+  NodeError.prototype.name = Base.name;
+  NodeError.prototype.code = code;
+  codes[code] = NodeError;
+} // https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js
+
+
+function oneOf(expected, thing) {
+  if (Array.isArray(expected)) {
+    var len = expected.length;
+    expected = expected.map(function (i) {
+      return String(i);
+    });
+
+    if (len > 2) {
+      return "one of ".concat(thing, " ").concat(expected.slice(0, len - 1).join(', '), ", or ") + expected[len - 1];
+    } else if (len === 2) {
+      return "one of ".concat(thing, " ").concat(expected[0], " or ").concat(expected[1]);
+    } else {
+      return "of ".concat(thing, " ").concat(expected[0]);
+    }
+  } else {
+    return "of ".concat(thing, " ").concat(String(expected));
+  }
+} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
+
+
+function startsWith(str, search, pos) {
+  return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
+} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
+
+
+function endsWith(str, search, this_len) {
+  if (this_len === undefined || this_len > str.length) {
+    this_len = str.length;
+  }
+
+  return str.substring(this_len - search.length, this_len) === search;
+} // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes
+
+
+function includes(str, search, start) {
+  if (typeof start !== 'number') {
+    start = 0;
+  }
+
+  if (start + search.length > str.length) {
+    return false;
+  } else {
+    return str.indexOf(search, start) !== -1;
+  }
+}
+
+createErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {
+  return 'The value "' + value + '" is invalid for option "' + name + '"';
+}, TypeError);
+createErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {
+  // determiner: 'must be' or 'must not be'
+  var determiner;
+
+  if (typeof expected === 'string' && startsWith(expected, 'not ')) {
+    determiner = 'must not be';
+    expected = expected.replace(/^not /, '');
+  } else {
+    determiner = 'must be';
+  }
+
+  var msg;
+
+  if (endsWith(name, ' argument')) {
+    // For cases like 'first argument'
+    msg = "The ".concat(name, " ").concat(determiner, " ").concat(oneOf(expected, 'type'));
+  } else {
+    var type = includes(name, '.') ? 'property' : 'argument';
+    msg = "The \"".concat(name, "\" ").concat(type, " ").concat(determiner, " ").concat(oneOf(expected, 'type'));
+  }
+
+  msg += ". Received type ".concat(typeof actual);
+  return msg;
+}, TypeError);
+createErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
+createErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {
+  return 'The ' + name + ' method is not implemented';
+});
+createErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');
+createErrorType('ERR_STREAM_DESTROYED', function (name) {
+  return 'Cannot call ' + name + ' after a stream was destroyed';
+});
+createErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
+createErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');
+createErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');
+createErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);
+createErrorType('ERR_UNKNOWN_ENCODING', function (arg) {
+  return 'Unknown encoding: ' + arg;
+}, TypeError);
+createErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');
+module.exports.codes = codes;
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/errors.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/errors.js
new file mode 100644
index 0000000..8471526
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/errors.js
@@ -0,0 +1,116 @@
+'use strict';
+
+const codes = {};
+
+function createErrorType(code, message, Base) {
+  if (!Base) {
+    Base = Error
+  }
+
+  function getMessage (arg1, arg2, arg3) {
+    if (typeof message === 'string') {
+      return message
+    } else {
+      return message(arg1, arg2, arg3)
+    }
+  }
+
+  class NodeError extends Base {
+    constructor (arg1, arg2, arg3) {
+      super(getMessage(arg1, arg2, arg3));
+    }
+  }
+
+  NodeError.prototype.name = Base.name;
+  NodeError.prototype.code = code;
+
+  codes[code] = NodeError;
+}
+
+// https://github.com/nodejs/node/blob/v10.8.0/lib/internal/errors.js
+function oneOf(expected, thing) {
+  if (Array.isArray(expected)) {
+    const len = expected.length;
+    expected = expected.map((i) => String(i));
+    if (len > 2) {
+      return `one of ${thing} ${expected.slice(0, len - 1).join(', ')}, or ` +
+             expected[len - 1];
+    } else if (len === 2) {
+      return `one of ${thing} ${expected[0]} or ${expected[1]}`;
+    } else {
+      return `of ${thing} ${expected[0]}`;
+    }
+  } else {
+    return `of ${thing} ${String(expected)}`;
+  }
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
+function startsWith(str, search, pos) {
+	return str.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/endsWith
+function endsWith(str, search, this_len) {
+	if (this_len === undefined || this_len > str.length) {
+		this_len = str.length;
+	}
+	return str.substring(this_len - search.length, this_len) === search;
+}
+
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/includes
+function includes(str, search, start) {
+  if (typeof start !== 'number') {
+    start = 0;
+  }
+
+  if (start + search.length > str.length) {
+    return false;
+  } else {
+    return str.indexOf(search, start) !== -1;
+  }
+}
+
+createErrorType('ERR_INVALID_OPT_VALUE', function (name, value) {
+  return 'The value "' + value + '" is invalid for option "' + name + '"'
+}, TypeError);
+createErrorType('ERR_INVALID_ARG_TYPE', function (name, expected, actual) {
+  // determiner: 'must be' or 'must not be'
+  let determiner;
+  if (typeof expected === 'string' && startsWith(expected, 'not ')) {
+    determiner = 'must not be';
+    expected = expected.replace(/^not /, '');
+  } else {
+    determiner = 'must be';
+  }
+
+  let msg;
+  if (endsWith(name, ' argument')) {
+    // For cases like 'first argument'
+    msg = `The ${name} ${determiner} ${oneOf(expected, 'type')}`;
+  } else {
+    const type = includes(name, '.') ? 'property' : 'argument';
+    msg = `The "${name}" ${type} ${determiner} ${oneOf(expected, 'type')}`;
+  }
+
+  msg += `. Received type ${typeof actual}`;
+  return msg;
+}, TypeError);
+createErrorType('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF');
+createErrorType('ERR_METHOD_NOT_IMPLEMENTED', function (name) {
+  return 'The ' + name + ' method is not implemented'
+});
+createErrorType('ERR_STREAM_PREMATURE_CLOSE', 'Premature close');
+createErrorType('ERR_STREAM_DESTROYED', function (name) {
+  return 'Cannot call ' + name + ' after a stream was destroyed';
+});
+createErrorType('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times');
+createErrorType('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable');
+createErrorType('ERR_STREAM_WRITE_AFTER_END', 'write after end');
+createErrorType('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError);
+createErrorType('ERR_UNKNOWN_ENCODING', function (arg) {
+  return 'Unknown encoding: ' + arg
+}, TypeError);
+createErrorType('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event');
+
+module.exports.codes = codes;
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/experimentalWarning.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/experimentalWarning.js
new file mode 100644
index 0000000..78e8414
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/experimentalWarning.js
@@ -0,0 +1,17 @@
+'use strict'
+
+var experimentalWarnings = new Set();
+
+function emitExperimentalWarning(feature) {
+  if (experimentalWarnings.has(feature)) return;
+  var msg = feature + ' is an experimental feature. This feature could ' +
+       'change at any time';
+  experimentalWarnings.add(feature);
+  process.emitWarning(msg, 'ExperimentalWarning');
+}
+
+function noop() {}
+
+module.exports.emitExperimentalWarning = process.emitWarning
+  ? emitExperimentalWarning
+  : noop;
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_duplex.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_duplex.js
new file mode 100644
index 0000000..19abfa6
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_duplex.js
@@ -0,0 +1,126 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a duplex stream is just a stream that is both readable and writable.
+// Since JS doesn't have multiple prototypal inheritance, this class
+// prototypally inherits from Readable, and then parasitically from
+// Writable.
+
+'use strict';
+
+/*<replacement>*/
+var objectKeys = Object.keys || function (obj) {
+  var keys = [];
+  for (var key in obj) keys.push(key);
+  return keys;
+};
+/*</replacement>*/
+
+module.exports = Duplex;
+var Readable = require('./_stream_readable');
+var Writable = require('./_stream_writable');
+require('inherits')(Duplex, Readable);
+{
+  // Allow the keys array to be GC'ed.
+  var keys = objectKeys(Writable.prototype);
+  for (var v = 0; v < keys.length; v++) {
+    var method = keys[v];
+    if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
+  }
+}
+function Duplex(options) {
+  if (!(this instanceof Duplex)) return new Duplex(options);
+  Readable.call(this, options);
+  Writable.call(this, options);
+  this.allowHalfOpen = true;
+  if (options) {
+    if (options.readable === false) this.readable = false;
+    if (options.writable === false) this.writable = false;
+    if (options.allowHalfOpen === false) {
+      this.allowHalfOpen = false;
+      this.once('end', onend);
+    }
+  }
+}
+Object.defineProperty(Duplex.prototype, 'writableHighWaterMark', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState.highWaterMark;
+  }
+});
+Object.defineProperty(Duplex.prototype, 'writableBuffer', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState && this._writableState.getBuffer();
+  }
+});
+Object.defineProperty(Duplex.prototype, 'writableLength', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState.length;
+  }
+});
+
+// the no-half-open enforcer
+function onend() {
+  // If the writable side ended, then we're ok.
+  if (this._writableState.ended) return;
+
+  // no more data can be written.
+  // But allow more writes to happen in this tick.
+  process.nextTick(onEndNT, this);
+}
+function onEndNT(self) {
+  self.end();
+}
+Object.defineProperty(Duplex.prototype, 'destroyed', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    if (this._readableState === undefined || this._writableState === undefined) {
+      return false;
+    }
+    return this._readableState.destroyed && this._writableState.destroyed;
+  },
+  set: function set(value) {
+    // we ignore the value if the stream
+    // has not been initialized yet
+    if (this._readableState === undefined || this._writableState === undefined) {
+      return;
+    }
+
+    // backward compatibility, the user is explicitly
+    // managing destroyed
+    this._readableState.destroyed = value;
+    this._writableState.destroyed = value;
+  }
+});
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_passthrough.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_passthrough.js
new file mode 100644
index 0000000..24a6bdd
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_passthrough.js
@@ -0,0 +1,37 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a passthrough stream.
+// basically just the most minimal sort of Transform stream.
+// Every written chunk gets output as-is.
+
+'use strict';
+
+module.exports = PassThrough;
+var Transform = require('./_stream_transform');
+require('inherits')(PassThrough, Transform);
+function PassThrough(options) {
+  if (!(this instanceof PassThrough)) return new PassThrough(options);
+  Transform.call(this, options);
+}
+PassThrough.prototype._transform = function (chunk, encoding, cb) {
+  cb(null, chunk);
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_readable.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_readable.js
new file mode 100644
index 0000000..df1f608
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_readable.js
@@ -0,0 +1,1027 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+
+module.exports = Readable;
+
+/*<replacement>*/
+var Duplex;
+/*</replacement>*/
+
+Readable.ReadableState = ReadableState;
+
+/*<replacement>*/
+var EE = require('events').EventEmitter;
+var EElistenerCount = function EElistenerCount(emitter, type) {
+  return emitter.listeners(type).length;
+};
+/*</replacement>*/
+
+/*<replacement>*/
+var Stream = require('./internal/streams/stream');
+/*</replacement>*/
+
+var Buffer = require('buffer').Buffer;
+var OurUint8Array = (typeof global !== 'undefined' ? global : typeof window !== 'undefined' ? window : typeof self !== 'undefined' ? self : {}).Uint8Array || function () {};
+function _uint8ArrayToBuffer(chunk) {
+  return Buffer.from(chunk);
+}
+function _isUint8Array(obj) {
+  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
+}
+
+/*<replacement>*/
+var debugUtil = require('util');
+var debug;
+if (debugUtil && debugUtil.debuglog) {
+  debug = debugUtil.debuglog('stream');
+} else {
+  debug = function debug() {};
+}
+/*</replacement>*/
+
+var BufferList = require('./internal/streams/buffer_list');
+var destroyImpl = require('./internal/streams/destroy');
+var _require = require('./internal/streams/state'),
+  getHighWaterMark = _require.getHighWaterMark;
+var _require$codes = require('../errors').codes,
+  ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,
+  ERR_STREAM_PUSH_AFTER_EOF = _require$codes.ERR_STREAM_PUSH_AFTER_EOF,
+  ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
+  ERR_STREAM_UNSHIFT_AFTER_END_EVENT = _require$codes.ERR_STREAM_UNSHIFT_AFTER_END_EVENT;
+
+// Lazy loaded to improve the startup performance.
+var StringDecoder;
+var createReadableStreamAsyncIterator;
+var from;
+require('inherits')(Readable, Stream);
+var errorOrDestroy = destroyImpl.errorOrDestroy;
+var kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];
+function prependListener(emitter, event, fn) {
+  // Sadly this is not cacheable as some libraries bundle their own
+  // event emitter implementation with them.
+  if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn);
+
+  // This is a hack to make sure that our error handler is attached before any
+  // userland ones.  NEVER DO THIS. This is here only because this code needs
+  // to continue to work with older versions of Node.js that do not include
+  // the prependListener() method. The goal is to eventually remove this hack.
+  if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (Array.isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
+}
+function ReadableState(options, stream, isDuplex) {
+  Duplex = Duplex || require('./_stream_duplex');
+  options = options || {};
+
+  // Duplex streams are both readable and writable, but share
+  // the same options object.
+  // However, some cases require setting options to different
+  // values for the readable and the writable sides of the duplex stream.
+  // These options can be provided separately as readableXXX and writableXXX.
+  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex;
+
+  // object stream flag. Used to make read(n) ignore n and to
+  // make all the buffer merging and length checks go away
+  this.objectMode = !!options.objectMode;
+  if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode;
+
+  // the point at which it stops calling _read() to fill the buffer
+  // Note: 0 is a valid value, means "don't call _read preemptively ever"
+  this.highWaterMark = getHighWaterMark(this, options, 'readableHighWaterMark', isDuplex);
+
+  // A linked list is used to store data chunks instead of an array because the
+  // linked list can remove elements from the beginning faster than
+  // array.shift()
+  this.buffer = new BufferList();
+  this.length = 0;
+  this.pipes = null;
+  this.pipesCount = 0;
+  this.flowing = null;
+  this.ended = false;
+  this.endEmitted = false;
+  this.reading = false;
+
+  // a flag to be able to tell if the event 'readable'/'data' is emitted
+  // immediately, or on a later tick.  We set this to true at first, because
+  // any actions that shouldn't happen until "later" should generally also
+  // not happen before the first read call.
+  this.sync = true;
+
+  // whenever we return null, then we set a flag to say
+  // that we're awaiting a 'readable' event emission.
+  this.needReadable = false;
+  this.emittedReadable = false;
+  this.readableListening = false;
+  this.resumeScheduled = false;
+  this.paused = true;
+
+  // Should close be emitted on destroy. Defaults to true.
+  this.emitClose = options.emitClose !== false;
+
+  // Should .destroy() be called after 'end' (and potentially 'finish')
+  this.autoDestroy = !!options.autoDestroy;
+
+  // has it been destroyed
+  this.destroyed = false;
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
+
+  // the number of writers that are awaiting a drain event in .pipe()s
+  this.awaitDrain = 0;
+
+  // if true, a maybeReadMore has been scheduled
+  this.readingMore = false;
+  this.decoder = null;
+  this.encoding = null;
+  if (options.encoding) {
+    if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
+    this.decoder = new StringDecoder(options.encoding);
+    this.encoding = options.encoding;
+  }
+}
+function Readable(options) {
+  Duplex = Duplex || require('./_stream_duplex');
+  if (!(this instanceof Readable)) return new Readable(options);
+
+  // Checking for a Stream.Duplex instance is faster here instead of inside
+  // the ReadableState constructor, at least with V8 6.5
+  var isDuplex = this instanceof Duplex;
+  this._readableState = new ReadableState(options, this, isDuplex);
+
+  // legacy
+  this.readable = true;
+  if (options) {
+    if (typeof options.read === 'function') this._read = options.read;
+    if (typeof options.destroy === 'function') this._destroy = options.destroy;
+  }
+  Stream.call(this);
+}
+Object.defineProperty(Readable.prototype, 'destroyed', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    if (this._readableState === undefined) {
+      return false;
+    }
+    return this._readableState.destroyed;
+  },
+  set: function set(value) {
+    // we ignore the value if the stream
+    // has not been initialized yet
+    if (!this._readableState) {
+      return;
+    }
+
+    // backward compatibility, the user is explicitly
+    // managing destroyed
+    this._readableState.destroyed = value;
+  }
+});
+Readable.prototype.destroy = destroyImpl.destroy;
+Readable.prototype._undestroy = destroyImpl.undestroy;
+Readable.prototype._destroy = function (err, cb) {
+  cb(err);
+};
+
+// Manually shove something into the read() buffer.
+// This returns true if the highWaterMark has not been hit yet,
+// similar to how Writable.write() returns true if you should
+// write() some more.
+Readable.prototype.push = function (chunk, encoding) {
+  var state = this._readableState;
+  var skipChunkCheck;
+  if (!state.objectMode) {
+    if (typeof chunk === 'string') {
+      encoding = encoding || state.defaultEncoding;
+      if (encoding !== state.encoding) {
+        chunk = Buffer.from(chunk, encoding);
+        encoding = '';
+      }
+      skipChunkCheck = true;
+    }
+  } else {
+    skipChunkCheck = true;
+  }
+  return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);
+};
+
+// Unshift should *always* be something directly out of read()
+Readable.prototype.unshift = function (chunk) {
+  return readableAddChunk(this, chunk, null, true, false);
+};
+function readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {
+  debug('readableAddChunk', chunk);
+  var state = stream._readableState;
+  if (chunk === null) {
+    state.reading = false;
+    onEofChunk(stream, state);
+  } else {
+    var er;
+    if (!skipChunkCheck) er = chunkInvalid(state, chunk);
+    if (er) {
+      errorOrDestroy(stream, er);
+    } else if (state.objectMode || chunk && chunk.length > 0) {
+      if (typeof chunk !== 'string' && !state.objectMode && Object.getPrototypeOf(chunk) !== Buffer.prototype) {
+        chunk = _uint8ArrayToBuffer(chunk);
+      }
+      if (addToFront) {
+        if (state.endEmitted) errorOrDestroy(stream, new ERR_STREAM_UNSHIFT_AFTER_END_EVENT());else addChunk(stream, state, chunk, true);
+      } else if (state.ended) {
+        errorOrDestroy(stream, new ERR_STREAM_PUSH_AFTER_EOF());
+      } else if (state.destroyed) {
+        return false;
+      } else {
+        state.reading = false;
+        if (state.decoder && !encoding) {
+          chunk = state.decoder.write(chunk);
+          if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);else maybeReadMore(stream, state);
+        } else {
+          addChunk(stream, state, chunk, false);
+        }
+      }
+    } else if (!addToFront) {
+      state.reading = false;
+      maybeReadMore(stream, state);
+    }
+  }
+
+  // We can push more data if we are below the highWaterMark.
+  // Also, if we have no data yet, we can stand some more bytes.
+  // This is to work around cases where hwm=0, such as the repl.
+  return !state.ended && (state.length < state.highWaterMark || state.length === 0);
+}
+function addChunk(stream, state, chunk, addToFront) {
+  if (state.flowing && state.length === 0 && !state.sync) {
+    state.awaitDrain = 0;
+    stream.emit('data', chunk);
+  } else {
+    // update the buffer info.
+    state.length += state.objectMode ? 1 : chunk.length;
+    if (addToFront) state.buffer.unshift(chunk);else state.buffer.push(chunk);
+    if (state.needReadable) emitReadable(stream);
+  }
+  maybeReadMore(stream, state);
+}
+function chunkInvalid(state, chunk) {
+  var er;
+  if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
+    er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer', 'Uint8Array'], chunk);
+  }
+  return er;
+}
+Readable.prototype.isPaused = function () {
+  return this._readableState.flowing === false;
+};
+
+// backwards compatibility.
+Readable.prototype.setEncoding = function (enc) {
+  if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
+  var decoder = new StringDecoder(enc);
+  this._readableState.decoder = decoder;
+  // If setEncoding(null), decoder.encoding equals utf8
+  this._readableState.encoding = this._readableState.decoder.encoding;
+
+  // Iterate over current buffer to convert already stored Buffers:
+  var p = this._readableState.buffer.head;
+  var content = '';
+  while (p !== null) {
+    content += decoder.write(p.data);
+    p = p.next;
+  }
+  this._readableState.buffer.clear();
+  if (content !== '') this._readableState.buffer.push(content);
+  this._readableState.length = content.length;
+  return this;
+};
+
+// Don't raise the hwm > 1GB
+var MAX_HWM = 0x40000000;
+function computeNewHighWaterMark(n) {
+  if (n >= MAX_HWM) {
+    // TODO(ronag): Throw ERR_VALUE_OUT_OF_RANGE.
+    n = MAX_HWM;
+  } else {
+    // Get the next highest power of 2 to prevent increasing hwm excessively in
+    // tiny amounts
+    n--;
+    n |= n >>> 1;
+    n |= n >>> 2;
+    n |= n >>> 4;
+    n |= n >>> 8;
+    n |= n >>> 16;
+    n++;
+  }
+  return n;
+}
+
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function howMuchToRead(n, state) {
+  if (n <= 0 || state.length === 0 && state.ended) return 0;
+  if (state.objectMode) return 1;
+  if (n !== n) {
+    // Only flow one buffer at a time
+    if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;
+  }
+  // If we're asking for more than the current hwm, then raise the hwm.
+  if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
+  if (n <= state.length) return n;
+  // Don't have enough
+  if (!state.ended) {
+    state.needReadable = true;
+    return 0;
+  }
+  return state.length;
+}
+
+// you can override either this method, or the async _read(n) below.
+Readable.prototype.read = function (n) {
+  debug('read', n);
+  n = parseInt(n, 10);
+  var state = this._readableState;
+  var nOrig = n;
+  if (n !== 0) state.emittedReadable = false;
+
+  // if we're doing read(0) to trigger a readable event, but we
+  // already have a bunch of data in the buffer, then just trigger
+  // the 'readable' event and move on.
+  if (n === 0 && state.needReadable && ((state.highWaterMark !== 0 ? state.length >= state.highWaterMark : state.length > 0) || state.ended)) {
+    debug('read: emitReadable', state.length, state.ended);
+    if (state.length === 0 && state.ended) endReadable(this);else emitReadable(this);
+    return null;
+  }
+  n = howMuchToRead(n, state);
+
+  // if we've ended, and we're now clear, then finish it up.
+  if (n === 0 && state.ended) {
+    if (state.length === 0) endReadable(this);
+    return null;
+  }
+
+  // All the actual chunk generation logic needs to be
+  // *below* the call to _read.  The reason is that in certain
+  // synthetic stream cases, such as passthrough streams, _read
+  // may be a completely synchronous operation which may change
+  // the state of the read buffer, providing enough data when
+  // before there was *not* enough.
+  //
+  // So, the steps are:
+  // 1. Figure out what the state of things will be after we do
+  // a read from the buffer.
+  //
+  // 2. If that resulting state will trigger a _read, then call _read.
+  // Note that this may be asynchronous, or synchronous.  Yes, it is
+  // deeply ugly to write APIs this way, but that still doesn't mean
+  // that the Readable class should behave improperly, as streams are
+  // designed to be sync/async agnostic.
+  // Take note if the _read call is sync or async (ie, if the read call
+  // has returned yet), so that we know whether or not it's safe to emit
+  // 'readable' etc.
+  //
+  // 3. Actually pull the requested chunks out of the buffer and return.
+
+  // if we need a readable event, then we need to do some reading.
+  var doRead = state.needReadable;
+  debug('need readable', doRead);
+
+  // if we currently have less than the highWaterMark, then also read some
+  if (state.length === 0 || state.length - n < state.highWaterMark) {
+    doRead = true;
+    debug('length less than watermark', doRead);
+  }
+
+  // however, if we've ended, then there's no point, and if we're already
+  // reading, then it's unnecessary.
+  if (state.ended || state.reading) {
+    doRead = false;
+    debug('reading or ended', doRead);
+  } else if (doRead) {
+    debug('do read');
+    state.reading = true;
+    state.sync = true;
+    // if the length is currently zero, then we *need* a readable event.
+    if (state.length === 0) state.needReadable = true;
+    // call internal read method
+    this._read(state.highWaterMark);
+    state.sync = false;
+    // If _read pushed data synchronously, then `reading` will be false,
+    // and we need to re-evaluate how much data we can return to the user.
+    if (!state.reading) n = howMuchToRead(nOrig, state);
+  }
+  var ret;
+  if (n > 0) ret = fromList(n, state);else ret = null;
+  if (ret === null) {
+    state.needReadable = state.length <= state.highWaterMark;
+    n = 0;
+  } else {
+    state.length -= n;
+    state.awaitDrain = 0;
+  }
+  if (state.length === 0) {
+    // If we have nothing in the buffer, then we want to know
+    // as soon as we *do* get something into the buffer.
+    if (!state.ended) state.needReadable = true;
+
+    // If we tried to read() past the EOF, then emit end on the next tick.
+    if (nOrig !== n && state.ended) endReadable(this);
+  }
+  if (ret !== null) this.emit('data', ret);
+  return ret;
+};
+function onEofChunk(stream, state) {
+  debug('onEofChunk');
+  if (state.ended) return;
+  if (state.decoder) {
+    var chunk = state.decoder.end();
+    if (chunk && chunk.length) {
+      state.buffer.push(chunk);
+      state.length += state.objectMode ? 1 : chunk.length;
+    }
+  }
+  state.ended = true;
+  if (state.sync) {
+    // if we are sync, wait until next tick to emit the data.
+    // Otherwise we risk emitting data in the flow()
+    // the readable code triggers during a read() call
+    emitReadable(stream);
+  } else {
+    // emit 'readable' now to make sure it gets picked up.
+    state.needReadable = false;
+    if (!state.emittedReadable) {
+      state.emittedReadable = true;
+      emitReadable_(stream);
+    }
+  }
+}
+
+// Don't emit readable right away in sync mode, because this can trigger
+// another read() call => stack overflow.  This way, it might trigger
+// a nextTick recursion warning, but that's not so bad.
+function emitReadable(stream) {
+  var state = stream._readableState;
+  debug('emitReadable', state.needReadable, state.emittedReadable);
+  state.needReadable = false;
+  if (!state.emittedReadable) {
+    debug('emitReadable', state.flowing);
+    state.emittedReadable = true;
+    process.nextTick(emitReadable_, stream);
+  }
+}
+function emitReadable_(stream) {
+  var state = stream._readableState;
+  debug('emitReadable_', state.destroyed, state.length, state.ended);
+  if (!state.destroyed && (state.length || state.ended)) {
+    stream.emit('readable');
+    state.emittedReadable = false;
+  }
+
+  // The stream needs another readable event if
+  // 1. It is not flowing, as the flow mechanism will take
+  //    care of it.
+  // 2. It is not ended.
+  // 3. It is below the highWaterMark, so we can schedule
+  //    another readable later.
+  state.needReadable = !state.flowing && !state.ended && state.length <= state.highWaterMark;
+  flow(stream);
+}
+
+// at this point, the user has presumably seen the 'readable' event,
+// and called read() to consume some data.  that may have triggered
+// in turn another _read(n) call, in which case reading = true if
+// it's in progress.
+// However, if we're not ended, or reading, and the length < hwm,
+// then go ahead and try to read some more preemptively.
+function maybeReadMore(stream, state) {
+  if (!state.readingMore) {
+    state.readingMore = true;
+    process.nextTick(maybeReadMore_, stream, state);
+  }
+}
+function maybeReadMore_(stream, state) {
+  // Attempt to read more data if we should.
+  //
+  // The conditions for reading more data are (one of):
+  // - Not enough data buffered (state.length < state.highWaterMark). The loop
+  //   is responsible for filling the buffer with enough data if such data
+  //   is available. If highWaterMark is 0 and we are not in the flowing mode
+  //   we should _not_ attempt to buffer any extra data. We'll get more data
+  //   when the stream consumer calls read() instead.
+  // - No data in the buffer, and the stream is in flowing mode. In this mode
+  //   the loop below is responsible for ensuring read() is called. Failing to
+  //   call read here would abort the flow and there's no other mechanism for
+  //   continuing the flow if the stream consumer has just subscribed to the
+  //   'data' event.
+  //
+  // In addition to the above conditions to keep reading data, the following
+  // conditions prevent the data from being read:
+  // - The stream has ended (state.ended).
+  // - There is already a pending 'read' operation (state.reading). This is a
+  //   case where the the stream has called the implementation defined _read()
+  //   method, but they are processing the call asynchronously and have _not_
+  //   called push() with new data. In this case we skip performing more
+  //   read()s. The execution ends in this method again after the _read() ends
+  //   up calling push() with more data.
+  while (!state.reading && !state.ended && (state.length < state.highWaterMark || state.flowing && state.length === 0)) {
+    var len = state.length;
+    debug('maybeReadMore read 0');
+    stream.read(0);
+    if (len === state.length)
+      // didn't get any data, stop spinning.
+      break;
+  }
+  state.readingMore = false;
+}
+
+// abstract method.  to be overridden in specific implementation classes.
+// call cb(er, data) where data is <= n in length.
+// for virtual (non-string, non-buffer) streams, "length" is somewhat
+// arbitrary, and perhaps not very meaningful.
+Readable.prototype._read = function (n) {
+  errorOrDestroy(this, new ERR_METHOD_NOT_IMPLEMENTED('_read()'));
+};
+Readable.prototype.pipe = function (dest, pipeOpts) {
+  var src = this;
+  var state = this._readableState;
+  switch (state.pipesCount) {
+    case 0:
+      state.pipes = dest;
+      break;
+    case 1:
+      state.pipes = [state.pipes, dest];
+      break;
+    default:
+      state.pipes.push(dest);
+      break;
+  }
+  state.pipesCount += 1;
+  debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);
+  var doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr;
+  var endFn = doEnd ? onend : unpipe;
+  if (state.endEmitted) process.nextTick(endFn);else src.once('end', endFn);
+  dest.on('unpipe', onunpipe);
+  function onunpipe(readable, unpipeInfo) {
+    debug('onunpipe');
+    if (readable === src) {
+      if (unpipeInfo && unpipeInfo.hasUnpiped === false) {
+        unpipeInfo.hasUnpiped = true;
+        cleanup();
+      }
+    }
+  }
+  function onend() {
+    debug('onend');
+    dest.end();
+  }
+
+  // when the dest drains, it reduces the awaitDrain counter
+  // on the source.  This would be more elegant with a .once()
+  // handler in flow(), but adding and removing repeatedly is
+  // too slow.
+  var ondrain = pipeOnDrain(src);
+  dest.on('drain', ondrain);
+  var cleanedUp = false;
+  function cleanup() {
+    debug('cleanup');
+    // cleanup event handlers once the pipe is broken
+    dest.removeListener('close', onclose);
+    dest.removeListener('finish', onfinish);
+    dest.removeListener('drain', ondrain);
+    dest.removeListener('error', onerror);
+    dest.removeListener('unpipe', onunpipe);
+    src.removeListener('end', onend);
+    src.removeListener('end', unpipe);
+    src.removeListener('data', ondata);
+    cleanedUp = true;
+
+    // if the reader is waiting for a drain event from this
+    // specific writer, then it would cause it to never start
+    // flowing again.
+    // So, if this is awaiting a drain, then we just call it now.
+    // If we don't know, then assume that we are waiting for one.
+    if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();
+  }
+  src.on('data', ondata);
+  function ondata(chunk) {
+    debug('ondata');
+    var ret = dest.write(chunk);
+    debug('dest.write', ret);
+    if (ret === false) {
+      // If the user unpiped during `dest.write()`, it is possible
+      // to get stuck in a permanently paused state if that write
+      // also returned false.
+      // => Check whether `dest` is still a piping destination.
+      if ((state.pipesCount === 1 && state.pipes === dest || state.pipesCount > 1 && indexOf(state.pipes, dest) !== -1) && !cleanedUp) {
+        debug('false write response, pause', state.awaitDrain);
+        state.awaitDrain++;
+      }
+      src.pause();
+    }
+  }
+
+  // if the dest has an error, then stop piping into it.
+  // however, don't suppress the throwing behavior for this.
+  function onerror(er) {
+    debug('onerror', er);
+    unpipe();
+    dest.removeListener('error', onerror);
+    if (EElistenerCount(dest, 'error') === 0) errorOrDestroy(dest, er);
+  }
+
+  // Make sure our error handler is attached before userland ones.
+  prependListener(dest, 'error', onerror);
+
+  // Both close and finish should trigger unpipe, but only once.
+  function onclose() {
+    dest.removeListener('finish', onfinish);
+    unpipe();
+  }
+  dest.once('close', onclose);
+  function onfinish() {
+    debug('onfinish');
+    dest.removeListener('close', onclose);
+    unpipe();
+  }
+  dest.once('finish', onfinish);
+  function unpipe() {
+    debug('unpipe');
+    src.unpipe(dest);
+  }
+
+  // tell the dest that it's being piped to
+  dest.emit('pipe', src);
+
+  // start the flow if it hasn't been started already.
+  if (!state.flowing) {
+    debug('pipe resume');
+    src.resume();
+  }
+  return dest;
+};
+function pipeOnDrain(src) {
+  return function pipeOnDrainFunctionResult() {
+    var state = src._readableState;
+    debug('pipeOnDrain', state.awaitDrain);
+    if (state.awaitDrain) state.awaitDrain--;
+    if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {
+      state.flowing = true;
+      flow(src);
+    }
+  };
+}
+Readable.prototype.unpipe = function (dest) {
+  var state = this._readableState;
+  var unpipeInfo = {
+    hasUnpiped: false
+  };
+
+  // if we're not piping anywhere, then do nothing.
+  if (state.pipesCount === 0) return this;
+
+  // just one destination.  most common case.
+  if (state.pipesCount === 1) {
+    // passed in one, but it's not the right one.
+    if (dest && dest !== state.pipes) return this;
+    if (!dest) dest = state.pipes;
+
+    // got a match.
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
+    if (dest) dest.emit('unpipe', this, unpipeInfo);
+    return this;
+  }
+
+  // slow case. multiple pipe destinations.
+
+  if (!dest) {
+    // remove all.
+    var dests = state.pipes;
+    var len = state.pipesCount;
+    state.pipes = null;
+    state.pipesCount = 0;
+    state.flowing = false;
+    for (var i = 0; i < len; i++) dests[i].emit('unpipe', this, {
+      hasUnpiped: false
+    });
+    return this;
+  }
+
+  // try to find the right one.
+  var index = indexOf(state.pipes, dest);
+  if (index === -1) return this;
+  state.pipes.splice(index, 1);
+  state.pipesCount -= 1;
+  if (state.pipesCount === 1) state.pipes = state.pipes[0];
+  dest.emit('unpipe', this, unpipeInfo);
+  return this;
+};
+
+// set up data events if they are asked for
+// Ensure readable listeners eventually get something
+Readable.prototype.on = function (ev, fn) {
+  var res = Stream.prototype.on.call(this, ev, fn);
+  var state = this._readableState;
+  if (ev === 'data') {
+    // update readableListening so that resume() may be a no-op
+    // a few lines down. This is needed to support once('readable').
+    state.readableListening = this.listenerCount('readable') > 0;
+
+    // Try start flowing on next tick if stream isn't explicitly paused
+    if (state.flowing !== false) this.resume();
+  } else if (ev === 'readable') {
+    if (!state.endEmitted && !state.readableListening) {
+      state.readableListening = state.needReadable = true;
+      state.flowing = false;
+      state.emittedReadable = false;
+      debug('on readable', state.length, state.reading);
+      if (state.length) {
+        emitReadable(this);
+      } else if (!state.reading) {
+        process.nextTick(nReadingNextTick, this);
+      }
+    }
+  }
+  return res;
+};
+Readable.prototype.addListener = Readable.prototype.on;
+Readable.prototype.removeListener = function (ev, fn) {
+  var res = Stream.prototype.removeListener.call(this, ev, fn);
+  if (ev === 'readable') {
+    // We need to check if there is someone still listening to
+    // readable and reset the state. However this needs to happen
+    // after readable has been emitted but before I/O (nextTick) to
+    // support once('readable', fn) cycles. This means that calling
+    // resume within the same tick will have no
+    // effect.
+    process.nextTick(updateReadableListening, this);
+  }
+  return res;
+};
+Readable.prototype.removeAllListeners = function (ev) {
+  var res = Stream.prototype.removeAllListeners.apply(this, arguments);
+  if (ev === 'readable' || ev === undefined) {
+    // We need to check if there is someone still listening to
+    // readable and reset the state. However this needs to happen
+    // after readable has been emitted but before I/O (nextTick) to
+    // support once('readable', fn) cycles. This means that calling
+    // resume within the same tick will have no
+    // effect.
+    process.nextTick(updateReadableListening, this);
+  }
+  return res;
+};
+function updateReadableListening(self) {
+  var state = self._readableState;
+  state.readableListening = self.listenerCount('readable') > 0;
+  if (state.resumeScheduled && !state.paused) {
+    // flowing needs to be set to true now, otherwise
+    // the upcoming resume will not flow.
+    state.flowing = true;
+
+    // crude way to check if we should resume
+  } else if (self.listenerCount('data') > 0) {
+    self.resume();
+  }
+}
+function nReadingNextTick(self) {
+  debug('readable nexttick read 0');
+  self.read(0);
+}
+
+// pause() and resume() are remnants of the legacy readable stream API
+// If the user uses them, then switch into old mode.
+Readable.prototype.resume = function () {
+  var state = this._readableState;
+  if (!state.flowing) {
+    debug('resume');
+    // we flow only if there is no one listening
+    // for readable, but we still have to call
+    // resume()
+    state.flowing = !state.readableListening;
+    resume(this, state);
+  }
+  state.paused = false;
+  return this;
+};
+function resume(stream, state) {
+  if (!state.resumeScheduled) {
+    state.resumeScheduled = true;
+    process.nextTick(resume_, stream, state);
+  }
+}
+function resume_(stream, state) {
+  debug('resume', state.reading);
+  if (!state.reading) {
+    stream.read(0);
+  }
+  state.resumeScheduled = false;
+  stream.emit('resume');
+  flow(stream);
+  if (state.flowing && !state.reading) stream.read(0);
+}
+Readable.prototype.pause = function () {
+  debug('call pause flowing=%j', this._readableState.flowing);
+  if (this._readableState.flowing !== false) {
+    debug('pause');
+    this._readableState.flowing = false;
+    this.emit('pause');
+  }
+  this._readableState.paused = true;
+  return this;
+};
+function flow(stream) {
+  var state = stream._readableState;
+  debug('flow', state.flowing);
+  while (state.flowing && stream.read() !== null);
+}
+
+// wrap an old-style stream as the async data source.
+// This is *not* part of the readable stream interface.
+// It is an ugly unfortunate mess of history.
+Readable.prototype.wrap = function (stream) {
+  var _this = this;
+  var state = this._readableState;
+  var paused = false;
+  stream.on('end', function () {
+    debug('wrapped end');
+    if (state.decoder && !state.ended) {
+      var chunk = state.decoder.end();
+      if (chunk && chunk.length) _this.push(chunk);
+    }
+    _this.push(null);
+  });
+  stream.on('data', function (chunk) {
+    debug('wrapped data');
+    if (state.decoder) chunk = state.decoder.write(chunk);
+
+    // don't skip over falsy values in objectMode
+    if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;
+    var ret = _this.push(chunk);
+    if (!ret) {
+      paused = true;
+      stream.pause();
+    }
+  });
+
+  // proxy all the other methods.
+  // important when wrapping filters and duplexes.
+  for (var i in stream) {
+    if (this[i] === undefined && typeof stream[i] === 'function') {
+      this[i] = function methodWrap(method) {
+        return function methodWrapReturnFunction() {
+          return stream[method].apply(stream, arguments);
+        };
+      }(i);
+    }
+  }
+
+  // proxy certain important events.
+  for (var n = 0; n < kProxyEvents.length; n++) {
+    stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));
+  }
+
+  // when we try to consume some more bytes, simply unpause the
+  // underlying stream.
+  this._read = function (n) {
+    debug('wrapped _read', n);
+    if (paused) {
+      paused = false;
+      stream.resume();
+    }
+  };
+  return this;
+};
+if (typeof Symbol === 'function') {
+  Readable.prototype[Symbol.asyncIterator] = function () {
+    if (createReadableStreamAsyncIterator === undefined) {
+      createReadableStreamAsyncIterator = require('./internal/streams/async_iterator');
+    }
+    return createReadableStreamAsyncIterator(this);
+  };
+}
+Object.defineProperty(Readable.prototype, 'readableHighWaterMark', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._readableState.highWaterMark;
+  }
+});
+Object.defineProperty(Readable.prototype, 'readableBuffer', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._readableState && this._readableState.buffer;
+  }
+});
+Object.defineProperty(Readable.prototype, 'readableFlowing', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._readableState.flowing;
+  },
+  set: function set(state) {
+    if (this._readableState) {
+      this._readableState.flowing = state;
+    }
+  }
+});
+
+// exposed for testing purposes only.
+Readable._fromList = fromList;
+Object.defineProperty(Readable.prototype, 'readableLength', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._readableState.length;
+  }
+});
+
+// Pluck off n bytes from an array of buffers.
+// Length is the combined lengths of all the buffers in the list.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function fromList(n, state) {
+  // nothing buffered
+  if (state.length === 0) return null;
+  var ret;
+  if (state.objectMode) ret = state.buffer.shift();else if (!n || n >= state.length) {
+    // read it all, truncate the list
+    if (state.decoder) ret = state.buffer.join('');else if (state.buffer.length === 1) ret = state.buffer.first();else ret = state.buffer.concat(state.length);
+    state.buffer.clear();
+  } else {
+    // read part of list
+    ret = state.buffer.consume(n, state.decoder);
+  }
+  return ret;
+}
+function endReadable(stream) {
+  var state = stream._readableState;
+  debug('endReadable', state.endEmitted);
+  if (!state.endEmitted) {
+    state.ended = true;
+    process.nextTick(endReadableNT, state, stream);
+  }
+}
+function endReadableNT(state, stream) {
+  debug('endReadableNT', state.endEmitted, state.length);
+
+  // Check that we didn't get one last unshift.
+  if (!state.endEmitted && state.length === 0) {
+    state.endEmitted = true;
+    stream.readable = false;
+    stream.emit('end');
+    if (state.autoDestroy) {
+      // In case of duplex streams we need a way to detect
+      // if the writable side is ready for autoDestroy as well
+      var wState = stream._writableState;
+      if (!wState || wState.autoDestroy && wState.finished) {
+        stream.destroy();
+      }
+    }
+  }
+}
+if (typeof Symbol === 'function') {
+  Readable.from = function (iterable, opts) {
+    if (from === undefined) {
+      from = require('./internal/streams/from');
+    }
+    return from(Readable, iterable, opts);
+  };
+}
+function indexOf(xs, x) {
+  for (var i = 0, l = xs.length; i < l; i++) {
+    if (xs[i] === x) return i;
+  }
+  return -1;
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_transform.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_transform.js
new file mode 100644
index 0000000..1ccb715
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_transform.js
@@ -0,0 +1,190 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a transform stream is a readable/writable stream where you do
+// something with the data.  Sometimes it's called a "filter",
+// but that's not a great name for it, since that implies a thing where
+// some bits pass through, and others are simply ignored.  (That would
+// be a valid example of a transform, of course.)
+//
+// While the output is causally related to the input, it's not a
+// necessarily symmetric or synchronous transformation.  For example,
+// a zlib stream might take multiple plain-text writes(), and then
+// emit a single compressed chunk some time in the future.
+//
+// Here's how this works:
+//
+// The Transform stream has all the aspects of the readable and writable
+// stream classes.  When you write(chunk), that calls _write(chunk,cb)
+// internally, and returns false if there's a lot of pending writes
+// buffered up.  When you call read(), that calls _read(n) until
+// there's enough pending readable data buffered up.
+//
+// In a transform stream, the written data is placed in a buffer.  When
+// _read(n) is called, it transforms the queued up data, calling the
+// buffered _write cb's as it consumes chunks.  If consuming a single
+// written chunk would result in multiple output chunks, then the first
+// outputted bit calls the readcb, and subsequent chunks just go into
+// the read buffer, and will cause it to emit 'readable' if necessary.
+//
+// This way, back-pressure is actually determined by the reading side,
+// since _read has to be called to start processing a new chunk.  However,
+// a pathological inflate type of transform can cause excessive buffering
+// here.  For example, imagine a stream where every byte of input is
+// interpreted as an integer from 0-255, and then results in that many
+// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
+// 1kb of data being output.  In this case, you could write a very small
+// amount of input, and end up with a very large amount of output.  In
+// such a pathological inflating mechanism, there'd be no way to tell
+// the system to stop doing the transform.  A single 4MB write could
+// cause the system to run out of memory.
+//
+// However, even in such a pathological case, only a single written chunk
+// would be consumed, and then the rest would wait (un-transformed) until
+// the results of the previous transformed chunk were consumed.
+
+'use strict';
+
+module.exports = Transform;
+var _require$codes = require('../errors').codes,
+  ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
+  ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,
+  ERR_TRANSFORM_ALREADY_TRANSFORMING = _require$codes.ERR_TRANSFORM_ALREADY_TRANSFORMING,
+  ERR_TRANSFORM_WITH_LENGTH_0 = _require$codes.ERR_TRANSFORM_WITH_LENGTH_0;
+var Duplex = require('./_stream_duplex');
+require('inherits')(Transform, Duplex);
+function afterTransform(er, data) {
+  var ts = this._transformState;
+  ts.transforming = false;
+  var cb = ts.writecb;
+  if (cb === null) {
+    return this.emit('error', new ERR_MULTIPLE_CALLBACK());
+  }
+  ts.writechunk = null;
+  ts.writecb = null;
+  if (data != null)
+    // single equals check for both `null` and `undefined`
+    this.push(data);
+  cb(er);
+  var rs = this._readableState;
+  rs.reading = false;
+  if (rs.needReadable || rs.length < rs.highWaterMark) {
+    this._read(rs.highWaterMark);
+  }
+}
+function Transform(options) {
+  if (!(this instanceof Transform)) return new Transform(options);
+  Duplex.call(this, options);
+  this._transformState = {
+    afterTransform: afterTransform.bind(this),
+    needTransform: false,
+    transforming: false,
+    writecb: null,
+    writechunk: null,
+    writeencoding: null
+  };
+
+  // start out asking for a readable event once data is transformed.
+  this._readableState.needReadable = true;
+
+  // we have implemented the _read method, and done the other things
+  // that Readable wants before the first _read call, so unset the
+  // sync guard flag.
+  this._readableState.sync = false;
+  if (options) {
+    if (typeof options.transform === 'function') this._transform = options.transform;
+    if (typeof options.flush === 'function') this._flush = options.flush;
+  }
+
+  // When the writable side finishes, then flush out anything remaining.
+  this.on('prefinish', prefinish);
+}
+function prefinish() {
+  var _this = this;
+  if (typeof this._flush === 'function' && !this._readableState.destroyed) {
+    this._flush(function (er, data) {
+      done(_this, er, data);
+    });
+  } else {
+    done(this, null, null);
+  }
+}
+Transform.prototype.push = function (chunk, encoding) {
+  this._transformState.needTransform = false;
+  return Duplex.prototype.push.call(this, chunk, encoding);
+};
+
+// This is the part where you do stuff!
+// override this function in implementation classes.
+// 'chunk' is an input chunk.
+//
+// Call `push(newChunk)` to pass along transformed output
+// to the readable side.  You may call 'push' zero or more times.
+//
+// Call `cb(err)` when you are done with this chunk.  If you pass
+// an error, then that'll put the hurt on the whole operation.  If you
+// never call cb(), then you'll never get another chunk.
+Transform.prototype._transform = function (chunk, encoding, cb) {
+  cb(new ERR_METHOD_NOT_IMPLEMENTED('_transform()'));
+};
+Transform.prototype._write = function (chunk, encoding, cb) {
+  var ts = this._transformState;
+  ts.writecb = cb;
+  ts.writechunk = chunk;
+  ts.writeencoding = encoding;
+  if (!ts.transforming) {
+    var rs = this._readableState;
+    if (ts.needTransform || rs.needReadable || rs.length < rs.highWaterMark) this._read(rs.highWaterMark);
+  }
+};
+
+// Doesn't matter what the args are here.
+// _transform does all the work.
+// That we got here means that the readable side wants more data.
+Transform.prototype._read = function (n) {
+  var ts = this._transformState;
+  if (ts.writechunk !== null && !ts.transforming) {
+    ts.transforming = true;
+    this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);
+  } else {
+    // mark that we need a transform, so that any data that comes in
+    // will get processed, now that we've asked for it.
+    ts.needTransform = true;
+  }
+};
+Transform.prototype._destroy = function (err, cb) {
+  Duplex.prototype._destroy.call(this, err, function (err2) {
+    cb(err2);
+  });
+};
+function done(stream, er, data) {
+  if (er) return stream.emit('error', er);
+  if (data != null)
+    // single equals check for both `null` and `undefined`
+    stream.push(data);
+
+  // TODO(BridgeAR): Write a test for these two error cases
+  // if there's nothing in the write buffer, then that means
+  // that nothing more will ever be provided
+  if (stream._writableState.length) throw new ERR_TRANSFORM_WITH_LENGTH_0();
+  if (stream._transformState.transforming) throw new ERR_TRANSFORM_ALREADY_TRANSFORMING();
+  return stream.push(null);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_writable.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_writable.js
new file mode 100644
index 0000000..292415e
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/_stream_writable.js
@@ -0,0 +1,641 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// A bit simpler than readable streams.
+// Implement an async ._write(chunk, encoding, cb), and it'll handle all
+// the drain event emission and buffering.
+
+'use strict';
+
+module.exports = Writable;
+
+/* <replacement> */
+function WriteReq(chunk, encoding, cb) {
+  this.chunk = chunk;
+  this.encoding = encoding;
+  this.callback = cb;
+  this.next = null;
+}
+
+// It seems a linked list but it is not
+// there will be only 2 of these for each stream
+function CorkedRequest(state) {
+  var _this = this;
+  this.next = null;
+  this.entry = null;
+  this.finish = function () {
+    onCorkedFinish(_this, state);
+  };
+}
+/* </replacement> */
+
+/*<replacement>*/
+var Duplex;
+/*</replacement>*/
+
+Writable.WritableState = WritableState;
+
+/*<replacement>*/
+var internalUtil = {
+  deprecate: require('util-deprecate')
+};
+/*</replacement>*/
+
+/*<replacement>*/
+var Stream = require('./internal/streams/stream');
+/*</replacement>*/
+
+var Buffer = require('buffer').Buffer;
+var OurUint8Array = (typeof global !== 'undefined' ? global : typeof window !== 'undefined' ? window : typeof self !== 'undefined' ? self : {}).Uint8Array || function () {};
+function _uint8ArrayToBuffer(chunk) {
+  return Buffer.from(chunk);
+}
+function _isUint8Array(obj) {
+  return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
+}
+var destroyImpl = require('./internal/streams/destroy');
+var _require = require('./internal/streams/state'),
+  getHighWaterMark = _require.getHighWaterMark;
+var _require$codes = require('../errors').codes,
+  ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,
+  ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
+  ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,
+  ERR_STREAM_CANNOT_PIPE = _require$codes.ERR_STREAM_CANNOT_PIPE,
+  ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED,
+  ERR_STREAM_NULL_VALUES = _require$codes.ERR_STREAM_NULL_VALUES,
+  ERR_STREAM_WRITE_AFTER_END = _require$codes.ERR_STREAM_WRITE_AFTER_END,
+  ERR_UNKNOWN_ENCODING = _require$codes.ERR_UNKNOWN_ENCODING;
+var errorOrDestroy = destroyImpl.errorOrDestroy;
+require('inherits')(Writable, Stream);
+function nop() {}
+function WritableState(options, stream, isDuplex) {
+  Duplex = Duplex || require('./_stream_duplex');
+  options = options || {};
+
+  // Duplex streams are both readable and writable, but share
+  // the same options object.
+  // However, some cases require setting options to different
+  // values for the readable and the writable sides of the duplex stream,
+  // e.g. options.readableObjectMode vs. options.writableObjectMode, etc.
+  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex;
+
+  // object stream flag to indicate whether or not this stream
+  // contains buffers or objects.
+  this.objectMode = !!options.objectMode;
+  if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode;
+
+  // the point at which write() starts returning false
+  // Note: 0 is a valid value, means that we always return false if
+  // the entire buffer is not flushed immediately on write()
+  this.highWaterMark = getHighWaterMark(this, options, 'writableHighWaterMark', isDuplex);
+
+  // if _final has been called
+  this.finalCalled = false;
+
+  // drain event flag.
+  this.needDrain = false;
+  // at the start of calling end()
+  this.ending = false;
+  // when end() has been called, and returned
+  this.ended = false;
+  // when 'finish' is emitted
+  this.finished = false;
+
+  // has it been destroyed
+  this.destroyed = false;
+
+  // should we decode strings into buffers before passing to _write?
+  // this is here so that some node-core streams can optimize string
+  // handling at a lower level.
+  var noDecode = options.decodeStrings === false;
+  this.decodeStrings = !noDecode;
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = options.defaultEncoding || 'utf8';
+
+  // not an actual buffer we keep track of, but a measurement
+  // of how much we're waiting to get pushed to some underlying
+  // socket or file.
+  this.length = 0;
+
+  // a flag to see when we're in the middle of a write.
+  this.writing = false;
+
+  // when true all writes will be buffered until .uncork() call
+  this.corked = 0;
+
+  // a flag to be able to tell if the onwrite cb is called immediately,
+  // or on a later tick.  We set this to true at first, because any
+  // actions that shouldn't happen until "later" should generally also
+  // not happen before the first write call.
+  this.sync = true;
+
+  // a flag to know if we're processing previously buffered items, which
+  // may call the _write() callback in the same tick, so that we don't
+  // end up in an overlapped onwrite situation.
+  this.bufferProcessing = false;
+
+  // the callback that's passed to _write(chunk,cb)
+  this.onwrite = function (er) {
+    onwrite(stream, er);
+  };
+
+  // the callback that the user supplies to write(chunk,encoding,cb)
+  this.writecb = null;
+
+  // the amount that is being written when _write is called.
+  this.writelen = 0;
+  this.bufferedRequest = null;
+  this.lastBufferedRequest = null;
+
+  // number of pending user-supplied write callbacks
+  // this must be 0 before 'finish' can be emitted
+  this.pendingcb = 0;
+
+  // emit prefinish if the only thing we're waiting for is _write cbs
+  // This is relevant for synchronous Transform streams
+  this.prefinished = false;
+
+  // True if the error was already emitted and should not be thrown again
+  this.errorEmitted = false;
+
+  // Should close be emitted on destroy. Defaults to true.
+  this.emitClose = options.emitClose !== false;
+
+  // Should .destroy() be called after 'finish' (and potentially 'end')
+  this.autoDestroy = !!options.autoDestroy;
+
+  // count buffered requests
+  this.bufferedRequestCount = 0;
+
+  // allocate the first CorkedRequest, there is always
+  // one allocated and free to use, and we maintain at most two
+  this.corkedRequestsFree = new CorkedRequest(this);
+}
+WritableState.prototype.getBuffer = function getBuffer() {
+  var current = this.bufferedRequest;
+  var out = [];
+  while (current) {
+    out.push(current);
+    current = current.next;
+  }
+  return out;
+};
+(function () {
+  try {
+    Object.defineProperty(WritableState.prototype, 'buffer', {
+      get: internalUtil.deprecate(function writableStateBufferGetter() {
+        return this.getBuffer();
+      }, '_writableState.buffer is deprecated. Use _writableState.getBuffer ' + 'instead.', 'DEP0003')
+    });
+  } catch (_) {}
+})();
+
+// Test _writableState for inheritance to account for Duplex streams,
+// whose prototype chain only points to Readable.
+var realHasInstance;
+if (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {
+  realHasInstance = Function.prototype[Symbol.hasInstance];
+  Object.defineProperty(Writable, Symbol.hasInstance, {
+    value: function value(object) {
+      if (realHasInstance.call(this, object)) return true;
+      if (this !== Writable) return false;
+      return object && object._writableState instanceof WritableState;
+    }
+  });
+} else {
+  realHasInstance = function realHasInstance(object) {
+    return object instanceof this;
+  };
+}
+function Writable(options) {
+  Duplex = Duplex || require('./_stream_duplex');
+
+  // Writable ctor is applied to Duplexes, too.
+  // `realHasInstance` is necessary because using plain `instanceof`
+  // would return false, as no `_writableState` property is attached.
+
+  // Trying to use the custom `instanceof` for Writable here will also break the
+  // Node.js LazyTransform implementation, which has a non-trivial getter for
+  // `_writableState` that would lead to infinite recursion.
+
+  // Checking for a Stream.Duplex instance is faster here instead of inside
+  // the WritableState constructor, at least with V8 6.5
+  var isDuplex = this instanceof Duplex;
+  if (!isDuplex && !realHasInstance.call(Writable, this)) return new Writable(options);
+  this._writableState = new WritableState(options, this, isDuplex);
+
+  // legacy.
+  this.writable = true;
+  if (options) {
+    if (typeof options.write === 'function') this._write = options.write;
+    if (typeof options.writev === 'function') this._writev = options.writev;
+    if (typeof options.destroy === 'function') this._destroy = options.destroy;
+    if (typeof options.final === 'function') this._final = options.final;
+  }
+  Stream.call(this);
+}
+
+// Otherwise people can pipe Writable streams, which is just wrong.
+Writable.prototype.pipe = function () {
+  errorOrDestroy(this, new ERR_STREAM_CANNOT_PIPE());
+};
+function writeAfterEnd(stream, cb) {
+  var er = new ERR_STREAM_WRITE_AFTER_END();
+  // TODO: defer error events consistently everywhere, not just the cb
+  errorOrDestroy(stream, er);
+  process.nextTick(cb, er);
+}
+
+// Checks that a user-supplied chunk is valid, especially for the particular
+// mode the stream is in. Currently this means that `null` is never accepted
+// and undefined/non-string values are only allowed in object mode.
+function validChunk(stream, state, chunk, cb) {
+  var er;
+  if (chunk === null) {
+    er = new ERR_STREAM_NULL_VALUES();
+  } else if (typeof chunk !== 'string' && !state.objectMode) {
+    er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer'], chunk);
+  }
+  if (er) {
+    errorOrDestroy(stream, er);
+    process.nextTick(cb, er);
+    return false;
+  }
+  return true;
+}
+Writable.prototype.write = function (chunk, encoding, cb) {
+  var state = this._writableState;
+  var ret = false;
+  var isBuf = !state.objectMode && _isUint8Array(chunk);
+  if (isBuf && !Buffer.isBuffer(chunk)) {
+    chunk = _uint8ArrayToBuffer(chunk);
+  }
+  if (typeof encoding === 'function') {
+    cb = encoding;
+    encoding = null;
+  }
+  if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;
+  if (typeof cb !== 'function') cb = nop;
+  if (state.ending) writeAfterEnd(this, cb);else if (isBuf || validChunk(this, state, chunk, cb)) {
+    state.pendingcb++;
+    ret = writeOrBuffer(this, state, isBuf, chunk, encoding, cb);
+  }
+  return ret;
+};
+Writable.prototype.cork = function () {
+  this._writableState.corked++;
+};
+Writable.prototype.uncork = function () {
+  var state = this._writableState;
+  if (state.corked) {
+    state.corked--;
+    if (!state.writing && !state.corked && !state.bufferProcessing && state.bufferedRequest) clearBuffer(this, state);
+  }
+};
+Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
+  // node::ParseEncoding() requires lower case.
+  if (typeof encoding === 'string') encoding = encoding.toLowerCase();
+  if (!(['hex', 'utf8', 'utf-8', 'ascii', 'binary', 'base64', 'ucs2', 'ucs-2', 'utf16le', 'utf-16le', 'raw'].indexOf((encoding + '').toLowerCase()) > -1)) throw new ERR_UNKNOWN_ENCODING(encoding);
+  this._writableState.defaultEncoding = encoding;
+  return this;
+};
+Object.defineProperty(Writable.prototype, 'writableBuffer', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState && this._writableState.getBuffer();
+  }
+});
+function decodeChunk(state, chunk, encoding) {
+  if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {
+    chunk = Buffer.from(chunk, encoding);
+  }
+  return chunk;
+}
+Object.defineProperty(Writable.prototype, 'writableHighWaterMark', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState.highWaterMark;
+  }
+});
+
+// if we're already writing something, then just put this
+// in the queue, and wait our turn.  Otherwise, call _write
+// If we return false, then we need a drain event, so set that flag.
+function writeOrBuffer(stream, state, isBuf, chunk, encoding, cb) {
+  if (!isBuf) {
+    var newChunk = decodeChunk(state, chunk, encoding);
+    if (chunk !== newChunk) {
+      isBuf = true;
+      encoding = 'buffer';
+      chunk = newChunk;
+    }
+  }
+  var len = state.objectMode ? 1 : chunk.length;
+  state.length += len;
+  var ret = state.length < state.highWaterMark;
+  // we must ensure that previous needDrain will not be reset to false.
+  if (!ret) state.needDrain = true;
+  if (state.writing || state.corked) {
+    var last = state.lastBufferedRequest;
+    state.lastBufferedRequest = {
+      chunk: chunk,
+      encoding: encoding,
+      isBuf: isBuf,
+      callback: cb,
+      next: null
+    };
+    if (last) {
+      last.next = state.lastBufferedRequest;
+    } else {
+      state.bufferedRequest = state.lastBufferedRequest;
+    }
+    state.bufferedRequestCount += 1;
+  } else {
+    doWrite(stream, state, false, len, chunk, encoding, cb);
+  }
+  return ret;
+}
+function doWrite(stream, state, writev, len, chunk, encoding, cb) {
+  state.writelen = len;
+  state.writecb = cb;
+  state.writing = true;
+  state.sync = true;
+  if (state.destroyed) state.onwrite(new ERR_STREAM_DESTROYED('write'));else if (writev) stream._writev(chunk, state.onwrite);else stream._write(chunk, encoding, state.onwrite);
+  state.sync = false;
+}
+function onwriteError(stream, state, sync, er, cb) {
+  --state.pendingcb;
+  if (sync) {
+    // defer the callback if we are being called synchronously
+    // to avoid piling up things on the stack
+    process.nextTick(cb, er);
+    // this can emit finish, and it will always happen
+    // after error
+    process.nextTick(finishMaybe, stream, state);
+    stream._writableState.errorEmitted = true;
+    errorOrDestroy(stream, er);
+  } else {
+    // the caller expect this to happen before if
+    // it is async
+    cb(er);
+    stream._writableState.errorEmitted = true;
+    errorOrDestroy(stream, er);
+    // this can emit finish, but finish must
+    // always follow error
+    finishMaybe(stream, state);
+  }
+}
+function onwriteStateUpdate(state) {
+  state.writing = false;
+  state.writecb = null;
+  state.length -= state.writelen;
+  state.writelen = 0;
+}
+function onwrite(stream, er) {
+  var state = stream._writableState;
+  var sync = state.sync;
+  var cb = state.writecb;
+  if (typeof cb !== 'function') throw new ERR_MULTIPLE_CALLBACK();
+  onwriteStateUpdate(state);
+  if (er) onwriteError(stream, state, sync, er, cb);else {
+    // Check if we're actually ready to finish, but don't emit yet
+    var finished = needFinish(state) || stream.destroyed;
+    if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {
+      clearBuffer(stream, state);
+    }
+    if (sync) {
+      process.nextTick(afterWrite, stream, state, finished, cb);
+    } else {
+      afterWrite(stream, state, finished, cb);
+    }
+  }
+}
+function afterWrite(stream, state, finished, cb) {
+  if (!finished) onwriteDrain(stream, state);
+  state.pendingcb--;
+  cb();
+  finishMaybe(stream, state);
+}
+
+// Must force callback to be called on nextTick, so that we don't
+// emit 'drain' before the write() consumer gets the 'false' return
+// value, and has a chance to attach a 'drain' listener.
+function onwriteDrain(stream, state) {
+  if (state.length === 0 && state.needDrain) {
+    state.needDrain = false;
+    stream.emit('drain');
+  }
+}
+
+// if there's something in the buffer waiting, then process it
+function clearBuffer(stream, state) {
+  state.bufferProcessing = true;
+  var entry = state.bufferedRequest;
+  if (stream._writev && entry && entry.next) {
+    // Fast case, write everything using _writev()
+    var l = state.bufferedRequestCount;
+    var buffer = new Array(l);
+    var holder = state.corkedRequestsFree;
+    holder.entry = entry;
+    var count = 0;
+    var allBuffers = true;
+    while (entry) {
+      buffer[count] = entry;
+      if (!entry.isBuf) allBuffers = false;
+      entry = entry.next;
+      count += 1;
+    }
+    buffer.allBuffers = allBuffers;
+    doWrite(stream, state, true, state.length, buffer, '', holder.finish);
+
+    // doWrite is almost always async, defer these to save a bit of time
+    // as the hot path ends with doWrite
+    state.pendingcb++;
+    state.lastBufferedRequest = null;
+    if (holder.next) {
+      state.corkedRequestsFree = holder.next;
+      holder.next = null;
+    } else {
+      state.corkedRequestsFree = new CorkedRequest(state);
+    }
+    state.bufferedRequestCount = 0;
+  } else {
+    // Slow case, write chunks one-by-one
+    while (entry) {
+      var chunk = entry.chunk;
+      var encoding = entry.encoding;
+      var cb = entry.callback;
+      var len = state.objectMode ? 1 : chunk.length;
+      doWrite(stream, state, false, len, chunk, encoding, cb);
+      entry = entry.next;
+      state.bufferedRequestCount--;
+      // if we didn't call the onwrite immediately, then
+      // it means that we need to wait until it does.
+      // also, that means that the chunk and cb are currently
+      // being processed, so move the buffer counter past them.
+      if (state.writing) {
+        break;
+      }
+    }
+    if (entry === null) state.lastBufferedRequest = null;
+  }
+  state.bufferedRequest = entry;
+  state.bufferProcessing = false;
+}
+Writable.prototype._write = function (chunk, encoding, cb) {
+  cb(new ERR_METHOD_NOT_IMPLEMENTED('_write()'));
+};
+Writable.prototype._writev = null;
+Writable.prototype.end = function (chunk, encoding, cb) {
+  var state = this._writableState;
+  if (typeof chunk === 'function') {
+    cb = chunk;
+    chunk = null;
+    encoding = null;
+  } else if (typeof encoding === 'function') {
+    cb = encoding;
+    encoding = null;
+  }
+  if (chunk !== null && chunk !== undefined) this.write(chunk, encoding);
+
+  // .end() fully uncorks
+  if (state.corked) {
+    state.corked = 1;
+    this.uncork();
+  }
+
+  // ignore unnecessary end() calls.
+  if (!state.ending) endWritable(this, state, cb);
+  return this;
+};
+Object.defineProperty(Writable.prototype, 'writableLength', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    return this._writableState.length;
+  }
+});
+function needFinish(state) {
+  return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;
+}
+function callFinal(stream, state) {
+  stream._final(function (err) {
+    state.pendingcb--;
+    if (err) {
+      errorOrDestroy(stream, err);
+    }
+    state.prefinished = true;
+    stream.emit('prefinish');
+    finishMaybe(stream, state);
+  });
+}
+function prefinish(stream, state) {
+  if (!state.prefinished && !state.finalCalled) {
+    if (typeof stream._final === 'function' && !state.destroyed) {
+      state.pendingcb++;
+      state.finalCalled = true;
+      process.nextTick(callFinal, stream, state);
+    } else {
+      state.prefinished = true;
+      stream.emit('prefinish');
+    }
+  }
+}
+function finishMaybe(stream, state) {
+  var need = needFinish(state);
+  if (need) {
+    prefinish(stream, state);
+    if (state.pendingcb === 0) {
+      state.finished = true;
+      stream.emit('finish');
+      if (state.autoDestroy) {
+        // In case of duplex streams we need a way to detect
+        // if the readable side is ready for autoDestroy as well
+        var rState = stream._readableState;
+        if (!rState || rState.autoDestroy && rState.endEmitted) {
+          stream.destroy();
+        }
+      }
+    }
+  }
+  return need;
+}
+function endWritable(stream, state, cb) {
+  state.ending = true;
+  finishMaybe(stream, state);
+  if (cb) {
+    if (state.finished) process.nextTick(cb);else stream.once('finish', cb);
+  }
+  state.ended = true;
+  stream.writable = false;
+}
+function onCorkedFinish(corkReq, state, err) {
+  var entry = corkReq.entry;
+  corkReq.entry = null;
+  while (entry) {
+    var cb = entry.callback;
+    state.pendingcb--;
+    cb(err);
+    entry = entry.next;
+  }
+
+  // reuse the free corkReq.
+  state.corkedRequestsFree.next = corkReq;
+}
+Object.defineProperty(Writable.prototype, 'destroyed', {
+  // making it explicit this property is not enumerable
+  // because otherwise some prototype manipulation in
+  // userland will fail
+  enumerable: false,
+  get: function get() {
+    if (this._writableState === undefined) {
+      return false;
+    }
+    return this._writableState.destroyed;
+  },
+  set: function set(value) {
+    // we ignore the value if the stream
+    // has not been initialized yet
+    if (!this._writableState) {
+      return;
+    }
+
+    // backward compatibility, the user is explicitly
+    // managing destroyed
+    this._writableState.destroyed = value;
+  }
+});
+Writable.prototype.destroy = destroyImpl.destroy;
+Writable.prototype._undestroy = destroyImpl.undestroy;
+Writable.prototype._destroy = function (err, cb) {
+  cb(err);
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/async_iterator.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/async_iterator.js
new file mode 100644
index 0000000..742c5a4
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/async_iterator.js
@@ -0,0 +1,180 @@
+'use strict';
+
+var _Object$setPrototypeO;
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+var finished = require('./end-of-stream');
+var kLastResolve = Symbol('lastResolve');
+var kLastReject = Symbol('lastReject');
+var kError = Symbol('error');
+var kEnded = Symbol('ended');
+var kLastPromise = Symbol('lastPromise');
+var kHandlePromise = Symbol('handlePromise');
+var kStream = Symbol('stream');
+function createIterResult(value, done) {
+  return {
+    value: value,
+    done: done
+  };
+}
+function readAndResolve(iter) {
+  var resolve = iter[kLastResolve];
+  if (resolve !== null) {
+    var data = iter[kStream].read();
+    // we defer if data is null
+    // we can be expecting either 'end' or
+    // 'error'
+    if (data !== null) {
+      iter[kLastPromise] = null;
+      iter[kLastResolve] = null;
+      iter[kLastReject] = null;
+      resolve(createIterResult(data, false));
+    }
+  }
+}
+function onReadable(iter) {
+  // we wait for the next tick, because it might
+  // emit an error with process.nextTick
+  process.nextTick(readAndResolve, iter);
+}
+function wrapForNext(lastPromise, iter) {
+  return function (resolve, reject) {
+    lastPromise.then(function () {
+      if (iter[kEnded]) {
+        resolve(createIterResult(undefined, true));
+        return;
+      }
+      iter[kHandlePromise](resolve, reject);
+    }, reject);
+  };
+}
+var AsyncIteratorPrototype = Object.getPrototypeOf(function () {});
+var ReadableStreamAsyncIteratorPrototype = Object.setPrototypeOf((_Object$setPrototypeO = {
+  get stream() {
+    return this[kStream];
+  },
+  next: function next() {
+    var _this = this;
+    // if we have detected an error in the meanwhile
+    // reject straight away
+    var error = this[kError];
+    if (error !== null) {
+      return Promise.reject(error);
+    }
+    if (this[kEnded]) {
+      return Promise.resolve(createIterResult(undefined, true));
+    }
+    if (this[kStream].destroyed) {
+      // We need to defer via nextTick because if .destroy(err) is
+      // called, the error will be emitted via nextTick, and
+      // we cannot guarantee that there is no error lingering around
+      // waiting to be emitted.
+      return new Promise(function (resolve, reject) {
+        process.nextTick(function () {
+          if (_this[kError]) {
+            reject(_this[kError]);
+          } else {
+            resolve(createIterResult(undefined, true));
+          }
+        });
+      });
+    }
+
+    // if we have multiple next() calls
+    // we will wait for the previous Promise to finish
+    // this logic is optimized to support for await loops,
+    // where next() is only called once at a time
+    var lastPromise = this[kLastPromise];
+    var promise;
+    if (lastPromise) {
+      promise = new Promise(wrapForNext(lastPromise, this));
+    } else {
+      // fast path needed to support multiple this.push()
+      // without triggering the next() queue
+      var data = this[kStream].read();
+      if (data !== null) {
+        return Promise.resolve(createIterResult(data, false));
+      }
+      promise = new Promise(this[kHandlePromise]);
+    }
+    this[kLastPromise] = promise;
+    return promise;
+  }
+}, _defineProperty(_Object$setPrototypeO, Symbol.asyncIterator, function () {
+  return this;
+}), _defineProperty(_Object$setPrototypeO, "return", function _return() {
+  var _this2 = this;
+  // destroy(err, cb) is a private API
+  // we can guarantee we have that here, because we control the
+  // Readable class this is attached to
+  return new Promise(function (resolve, reject) {
+    _this2[kStream].destroy(null, function (err) {
+      if (err) {
+        reject(err);
+        return;
+      }
+      resolve(createIterResult(undefined, true));
+    });
+  });
+}), _Object$setPrototypeO), AsyncIteratorPrototype);
+var createReadableStreamAsyncIterator = function createReadableStreamAsyncIterator(stream) {
+  var _Object$create;
+  var iterator = Object.create(ReadableStreamAsyncIteratorPrototype, (_Object$create = {}, _defineProperty(_Object$create, kStream, {
+    value: stream,
+    writable: true
+  }), _defineProperty(_Object$create, kLastResolve, {
+    value: null,
+    writable: true
+  }), _defineProperty(_Object$create, kLastReject, {
+    value: null,
+    writable: true
+  }), _defineProperty(_Object$create, kError, {
+    value: null,
+    writable: true
+  }), _defineProperty(_Object$create, kEnded, {
+    value: stream._readableState.endEmitted,
+    writable: true
+  }), _defineProperty(_Object$create, kHandlePromise, {
+    value: function value(resolve, reject) {
+      var data = iterator[kStream].read();
+      if (data) {
+        iterator[kLastPromise] = null;
+        iterator[kLastResolve] = null;
+        iterator[kLastReject] = null;
+        resolve(createIterResult(data, false));
+      } else {
+        iterator[kLastResolve] = resolve;
+        iterator[kLastReject] = reject;
+      }
+    },
+    writable: true
+  }), _Object$create));
+  iterator[kLastPromise] = null;
+  finished(stream, function (err) {
+    if (err && err.code !== 'ERR_STREAM_PREMATURE_CLOSE') {
+      var reject = iterator[kLastReject];
+      // reject if we are waiting for data in the Promise
+      // returned by next() and store the error
+      if (reject !== null) {
+        iterator[kLastPromise] = null;
+        iterator[kLastResolve] = null;
+        iterator[kLastReject] = null;
+        reject(err);
+      }
+      iterator[kError] = err;
+      return;
+    }
+    var resolve = iterator[kLastResolve];
+    if (resolve !== null) {
+      iterator[kLastPromise] = null;
+      iterator[kLastResolve] = null;
+      iterator[kLastReject] = null;
+      resolve(createIterResult(undefined, true));
+    }
+    iterator[kEnded] = true;
+  });
+  stream.on('readable', onReadable.bind(null, iterator));
+  return iterator;
+};
+module.exports = createReadableStreamAsyncIterator;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/buffer_list.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/buffer_list.js
new file mode 100644
index 0000000..69bda49
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/buffer_list.js
@@ -0,0 +1,183 @@
+'use strict';
+
+function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+var _require = require('buffer'),
+  Buffer = _require.Buffer;
+var _require2 = require('util'),
+  inspect = _require2.inspect;
+var custom = inspect && inspect.custom || 'inspect';
+function copyBuffer(src, target, offset) {
+  Buffer.prototype.copy.call(src, target, offset);
+}
+module.exports = /*#__PURE__*/function () {
+  function BufferList() {
+    _classCallCheck(this, BufferList);
+    this.head = null;
+    this.tail = null;
+    this.length = 0;
+  }
+  _createClass(BufferList, [{
+    key: "push",
+    value: function push(v) {
+      var entry = {
+        data: v,
+        next: null
+      };
+      if (this.length > 0) this.tail.next = entry;else this.head = entry;
+      this.tail = entry;
+      ++this.length;
+    }
+  }, {
+    key: "unshift",
+    value: function unshift(v) {
+      var entry = {
+        data: v,
+        next: this.head
+      };
+      if (this.length === 0) this.tail = entry;
+      this.head = entry;
+      ++this.length;
+    }
+  }, {
+    key: "shift",
+    value: function shift() {
+      if (this.length === 0) return;
+      var ret = this.head.data;
+      if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
+      --this.length;
+      return ret;
+    }
+  }, {
+    key: "clear",
+    value: function clear() {
+      this.head = this.tail = null;
+      this.length = 0;
+    }
+  }, {
+    key: "join",
+    value: function join(s) {
+      if (this.length === 0) return '';
+      var p = this.head;
+      var ret = '' + p.data;
+      while (p = p.next) ret += s + p.data;
+      return ret;
+    }
+  }, {
+    key: "concat",
+    value: function concat(n) {
+      if (this.length === 0) return Buffer.alloc(0);
+      var ret = Buffer.allocUnsafe(n >>> 0);
+      var p = this.head;
+      var i = 0;
+      while (p) {
+        copyBuffer(p.data, ret, i);
+        i += p.data.length;
+        p = p.next;
+      }
+      return ret;
+    }
+
+    // Consumes a specified amount of bytes or characters from the buffered data.
+  }, {
+    key: "consume",
+    value: function consume(n, hasStrings) {
+      var ret;
+      if (n < this.head.data.length) {
+        // `slice` is the same for buffers and strings.
+        ret = this.head.data.slice(0, n);
+        this.head.data = this.head.data.slice(n);
+      } else if (n === this.head.data.length) {
+        // First chunk is a perfect match.
+        ret = this.shift();
+      } else {
+        // Result spans more than one buffer.
+        ret = hasStrings ? this._getString(n) : this._getBuffer(n);
+      }
+      return ret;
+    }
+  }, {
+    key: "first",
+    value: function first() {
+      return this.head.data;
+    }
+
+    // Consumes a specified amount of characters from the buffered data.
+  }, {
+    key: "_getString",
+    value: function _getString(n) {
+      var p = this.head;
+      var c = 1;
+      var ret = p.data;
+      n -= ret.length;
+      while (p = p.next) {
+        var str = p.data;
+        var nb = n > str.length ? str.length : n;
+        if (nb === str.length) ret += str;else ret += str.slice(0, n);
+        n -= nb;
+        if (n === 0) {
+          if (nb === str.length) {
+            ++c;
+            if (p.next) this.head = p.next;else this.head = this.tail = null;
+          } else {
+            this.head = p;
+            p.data = str.slice(nb);
+          }
+          break;
+        }
+        ++c;
+      }
+      this.length -= c;
+      return ret;
+    }
+
+    // Consumes a specified amount of bytes from the buffered data.
+  }, {
+    key: "_getBuffer",
+    value: function _getBuffer(n) {
+      var ret = Buffer.allocUnsafe(n);
+      var p = this.head;
+      var c = 1;
+      p.data.copy(ret);
+      n -= p.data.length;
+      while (p = p.next) {
+        var buf = p.data;
+        var nb = n > buf.length ? buf.length : n;
+        buf.copy(ret, ret.length - n, 0, nb);
+        n -= nb;
+        if (n === 0) {
+          if (nb === buf.length) {
+            ++c;
+            if (p.next) this.head = p.next;else this.head = this.tail = null;
+          } else {
+            this.head = p;
+            p.data = buf.slice(nb);
+          }
+          break;
+        }
+        ++c;
+      }
+      this.length -= c;
+      return ret;
+    }
+
+    // Make sure the linked list only shows the minimal necessary information.
+  }, {
+    key: custom,
+    value: function value(_, options) {
+      return inspect(this, _objectSpread(_objectSpread({}, options), {}, {
+        // Only inspect one level.
+        depth: 0,
+        // It should not recurse.
+        customInspect: false
+      }));
+    }
+  }]);
+  return BufferList;
+}();
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/destroy.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/destroy.js
new file mode 100644
index 0000000..31a17c4
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/destroy.js
@@ -0,0 +1,96 @@
+'use strict';
+
+// undocumented cb() API, needed for core, not for public API
+function destroy(err, cb) {
+  var _this = this;
+  var readableDestroyed = this._readableState && this._readableState.destroyed;
+  var writableDestroyed = this._writableState && this._writableState.destroyed;
+  if (readableDestroyed || writableDestroyed) {
+    if (cb) {
+      cb(err);
+    } else if (err) {
+      if (!this._writableState) {
+        process.nextTick(emitErrorNT, this, err);
+      } else if (!this._writableState.errorEmitted) {
+        this._writableState.errorEmitted = true;
+        process.nextTick(emitErrorNT, this, err);
+      }
+    }
+    return this;
+  }
+
+  // we set destroyed to true before firing error callbacks in order
+  // to make it re-entrance safe in case destroy() is called within callbacks
+
+  if (this._readableState) {
+    this._readableState.destroyed = true;
+  }
+
+  // if this is a duplex stream mark the writable part as destroyed as well
+  if (this._writableState) {
+    this._writableState.destroyed = true;
+  }
+  this._destroy(err || null, function (err) {
+    if (!cb && err) {
+      if (!_this._writableState) {
+        process.nextTick(emitErrorAndCloseNT, _this, err);
+      } else if (!_this._writableState.errorEmitted) {
+        _this._writableState.errorEmitted = true;
+        process.nextTick(emitErrorAndCloseNT, _this, err);
+      } else {
+        process.nextTick(emitCloseNT, _this);
+      }
+    } else if (cb) {
+      process.nextTick(emitCloseNT, _this);
+      cb(err);
+    } else {
+      process.nextTick(emitCloseNT, _this);
+    }
+  });
+  return this;
+}
+function emitErrorAndCloseNT(self, err) {
+  emitErrorNT(self, err);
+  emitCloseNT(self);
+}
+function emitCloseNT(self) {
+  if (self._writableState && !self._writableState.emitClose) return;
+  if (self._readableState && !self._readableState.emitClose) return;
+  self.emit('close');
+}
+function undestroy() {
+  if (this._readableState) {
+    this._readableState.destroyed = false;
+    this._readableState.reading = false;
+    this._readableState.ended = false;
+    this._readableState.endEmitted = false;
+  }
+  if (this._writableState) {
+    this._writableState.destroyed = false;
+    this._writableState.ended = false;
+    this._writableState.ending = false;
+    this._writableState.finalCalled = false;
+    this._writableState.prefinished = false;
+    this._writableState.finished = false;
+    this._writableState.errorEmitted = false;
+  }
+}
+function emitErrorNT(self, err) {
+  self.emit('error', err);
+}
+function errorOrDestroy(stream, err) {
+  // We have tests that rely on errors being emitted
+  // in the same tick, so changing this is semver major.
+  // For now when you opt-in to autoDestroy we allow
+  // the error to be emitted nextTick. In a future
+  // semver major update we should change the default to this.
+
+  var rState = stream._readableState;
+  var wState = stream._writableState;
+  if (rState && rState.autoDestroy || wState && wState.autoDestroy) stream.destroy(err);else stream.emit('error', err);
+}
+module.exports = {
+  destroy: destroy,
+  undestroy: undestroy,
+  errorOrDestroy: errorOrDestroy
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/end-of-stream.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/end-of-stream.js
new file mode 100644
index 0000000..59c671b
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/end-of-stream.js
@@ -0,0 +1,86 @@
+// Ported from https://github.com/mafintosh/end-of-stream with
+// permission from the author, Mathias Buus (@mafintosh).
+
+'use strict';
+
+var ERR_STREAM_PREMATURE_CLOSE = require('../../../errors').codes.ERR_STREAM_PREMATURE_CLOSE;
+function once(callback) {
+  var called = false;
+  return function () {
+    if (called) return;
+    called = true;
+    for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+      args[_key] = arguments[_key];
+    }
+    callback.apply(this, args);
+  };
+}
+function noop() {}
+function isRequest(stream) {
+  return stream.setHeader && typeof stream.abort === 'function';
+}
+function eos(stream, opts, callback) {
+  if (typeof opts === 'function') return eos(stream, null, opts);
+  if (!opts) opts = {};
+  callback = once(callback || noop);
+  var readable = opts.readable || opts.readable !== false && stream.readable;
+  var writable = opts.writable || opts.writable !== false && stream.writable;
+  var onlegacyfinish = function onlegacyfinish() {
+    if (!stream.writable) onfinish();
+  };
+  var writableEnded = stream._writableState && stream._writableState.finished;
+  var onfinish = function onfinish() {
+    writable = false;
+    writableEnded = true;
+    if (!readable) callback.call(stream);
+  };
+  var readableEnded = stream._readableState && stream._readableState.endEmitted;
+  var onend = function onend() {
+    readable = false;
+    readableEnded = true;
+    if (!writable) callback.call(stream);
+  };
+  var onerror = function onerror(err) {
+    callback.call(stream, err);
+  };
+  var onclose = function onclose() {
+    var err;
+    if (readable && !readableEnded) {
+      if (!stream._readableState || !stream._readableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
+      return callback.call(stream, err);
+    }
+    if (writable && !writableEnded) {
+      if (!stream._writableState || !stream._writableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();
+      return callback.call(stream, err);
+    }
+  };
+  var onrequest = function onrequest() {
+    stream.req.on('finish', onfinish);
+  };
+  if (isRequest(stream)) {
+    stream.on('complete', onfinish);
+    stream.on('abort', onclose);
+    if (stream.req) onrequest();else stream.on('request', onrequest);
+  } else if (writable && !stream._writableState) {
+    // legacy streams
+    stream.on('end', onlegacyfinish);
+    stream.on('close', onlegacyfinish);
+  }
+  stream.on('end', onend);
+  stream.on('finish', onfinish);
+  if (opts.error !== false) stream.on('error', onerror);
+  stream.on('close', onclose);
+  return function () {
+    stream.removeListener('complete', onfinish);
+    stream.removeListener('abort', onclose);
+    stream.removeListener('request', onrequest);
+    if (stream.req) stream.req.removeListener('finish', onfinish);
+    stream.removeListener('end', onlegacyfinish);
+    stream.removeListener('close', onlegacyfinish);
+    stream.removeListener('finish', onfinish);
+    stream.removeListener('end', onend);
+    stream.removeListener('error', onerror);
+    stream.removeListener('close', onclose);
+  };
+}
+module.exports = eos;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/from-browser.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/from-browser.js
new file mode 100644
index 0000000..a4ce56f
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/from-browser.js
@@ -0,0 +1,3 @@
+module.exports = function () {
+  throw new Error('Readable.from is not available in the browser')
+};
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/from.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/from.js
new file mode 100644
index 0000000..0a34ee9
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/from.js
@@ -0,0 +1,52 @@
+'use strict';
+
+function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }
+function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }
+function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
+function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+var ERR_INVALID_ARG_TYPE = require('../../../errors').codes.ERR_INVALID_ARG_TYPE;
+function from(Readable, iterable, opts) {
+  var iterator;
+  if (iterable && typeof iterable.next === 'function') {
+    iterator = iterable;
+  } else if (iterable && iterable[Symbol.asyncIterator]) iterator = iterable[Symbol.asyncIterator]();else if (iterable && iterable[Symbol.iterator]) iterator = iterable[Symbol.iterator]();else throw new ERR_INVALID_ARG_TYPE('iterable', ['Iterable'], iterable);
+  var readable = new Readable(_objectSpread({
+    objectMode: true
+  }, opts));
+  // Reading boolean to protect against _read
+  // being called before last iteration completion.
+  var reading = false;
+  readable._read = function () {
+    if (!reading) {
+      reading = true;
+      next();
+    }
+  };
+  function next() {
+    return _next2.apply(this, arguments);
+  }
+  function _next2() {
+    _next2 = _asyncToGenerator(function* () {
+      try {
+        var _yield$iterator$next = yield iterator.next(),
+          value = _yield$iterator$next.value,
+          done = _yield$iterator$next.done;
+        if (done) {
+          readable.push(null);
+        } else if (readable.push(yield value)) {
+          next();
+        } else {
+          reading = false;
+        }
+      } catch (err) {
+        readable.destroy(err);
+      }
+    });
+    return _next2.apply(this, arguments);
+  }
+  return readable;
+}
+module.exports = from;
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/pipeline.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/pipeline.js
new file mode 100644
index 0000000..e6f3924
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/pipeline.js
@@ -0,0 +1,86 @@
+// Ported from https://github.com/mafintosh/pump with
+// permission from the author, Mathias Buus (@mafintosh).
+
+'use strict';
+
+var eos;
+function once(callback) {
+  var called = false;
+  return function () {
+    if (called) return;
+    called = true;
+    callback.apply(void 0, arguments);
+  };
+}
+var _require$codes = require('../../../errors').codes,
+  ERR_MISSING_ARGS = _require$codes.ERR_MISSING_ARGS,
+  ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED;
+function noop(err) {
+  // Rethrow the error if it exists to avoid swallowing it
+  if (err) throw err;
+}
+function isRequest(stream) {
+  return stream.setHeader && typeof stream.abort === 'function';
+}
+function destroyer(stream, reading, writing, callback) {
+  callback = once(callback);
+  var closed = false;
+  stream.on('close', function () {
+    closed = true;
+  });
+  if (eos === undefined) eos = require('./end-of-stream');
+  eos(stream, {
+    readable: reading,
+    writable: writing
+  }, function (err) {
+    if (err) return callback(err);
+    closed = true;
+    callback();
+  });
+  var destroyed = false;
+  return function (err) {
+    if (closed) return;
+    if (destroyed) return;
+    destroyed = true;
+
+    // request.destroy just do .end - .abort is what we want
+    if (isRequest(stream)) return stream.abort();
+    if (typeof stream.destroy === 'function') return stream.destroy();
+    callback(err || new ERR_STREAM_DESTROYED('pipe'));
+  };
+}
+function call(fn) {
+  fn();
+}
+function pipe(from, to) {
+  return from.pipe(to);
+}
+function popCallback(streams) {
+  if (!streams.length) return noop;
+  if (typeof streams[streams.length - 1] !== 'function') return noop;
+  return streams.pop();
+}
+function pipeline() {
+  for (var _len = arguments.length, streams = new Array(_len), _key = 0; _key < _len; _key++) {
+    streams[_key] = arguments[_key];
+  }
+  var callback = popCallback(streams);
+  if (Array.isArray(streams[0])) streams = streams[0];
+  if (streams.length < 2) {
+    throw new ERR_MISSING_ARGS('streams');
+  }
+  var error;
+  var destroys = streams.map(function (stream, i) {
+    var reading = i < streams.length - 1;
+    var writing = i > 0;
+    return destroyer(stream, reading, writing, function (err) {
+      if (!error) error = err;
+      if (err) destroys.forEach(call);
+      if (reading) return;
+      destroys.forEach(call);
+      callback(error);
+    });
+  });
+  return streams.reduce(pipe);
+}
+module.exports = pipeline;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/state.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/state.js
new file mode 100644
index 0000000..3fbf892
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/state.js
@@ -0,0 +1,22 @@
+'use strict';
+
+var ERR_INVALID_OPT_VALUE = require('../../../errors').codes.ERR_INVALID_OPT_VALUE;
+function highWaterMarkFrom(options, isDuplex, duplexKey) {
+  return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null;
+}
+function getHighWaterMark(state, options, duplexKey, isDuplex) {
+  var hwm = highWaterMarkFrom(options, isDuplex, duplexKey);
+  if (hwm != null) {
+    if (!(isFinite(hwm) && Math.floor(hwm) === hwm) || hwm < 0) {
+      var name = isDuplex ? duplexKey : 'highWaterMark';
+      throw new ERR_INVALID_OPT_VALUE(name, hwm);
+    }
+    return Math.floor(hwm);
+  }
+
+  // Default value
+  return state.objectMode ? 16 : 16 * 1024;
+}
+module.exports = {
+  getHighWaterMark: getHighWaterMark
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/stream-browser.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/stream-browser.js
new file mode 100644
index 0000000..9332a3f
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/stream-browser.js
@@ -0,0 +1 @@
+module.exports = require('events').EventEmitter;
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/stream.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/stream.js
new file mode 100644
index 0000000..ce2ad5b
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/lib/internal/streams/stream.js
@@ -0,0 +1 @@
+module.exports = require('stream');
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/package.json b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/package.json
new file mode 100644
index 0000000..ade59e7
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/package.json
@@ -0,0 +1,68 @@
+{
+  "name": "readable-stream",
+  "version": "3.6.2",
+  "description": "Streams3, a user-land copy of the stream library from Node.js",
+  "main": "readable.js",
+  "engines": {
+    "node": ">= 6"
+  },
+  "dependencies": {
+    "inherits": "^2.0.3",
+    "string_decoder": "^1.1.1",
+    "util-deprecate": "^1.0.1"
+  },
+  "devDependencies": {
+    "@babel/cli": "^7.2.0",
+    "@babel/core": "^7.2.0",
+    "@babel/polyfill": "^7.0.0",
+    "@babel/preset-env": "^7.2.0",
+    "airtap": "0.0.9",
+    "assert": "^1.4.0",
+    "bl": "^2.0.0",
+    "deep-strict-equal": "^0.2.0",
+    "events.once": "^2.0.2",
+    "glob": "^7.1.2",
+    "gunzip-maybe": "^1.4.1",
+    "hyperquest": "^2.1.3",
+    "lolex": "^2.6.0",
+    "nyc": "^11.0.0",
+    "pump": "^3.0.0",
+    "rimraf": "^2.6.2",
+    "tap": "^12.0.0",
+    "tape": "^4.9.0",
+    "tar-fs": "^1.16.2",
+    "util-promisify": "^2.1.0"
+  },
+  "scripts": {
+    "test": "tap -J --no-esm test/parallel/*.js test/ours/*.js",
+    "ci": "TAP=1 tap --no-esm test/parallel/*.js test/ours/*.js | tee test.tap",
+    "test-browsers": "airtap --sauce-connect --loopback airtap.local -- test/browser.js",
+    "test-browser-local": "airtap --open --local -- test/browser.js",
+    "cover": "nyc npm test",
+    "report": "nyc report --reporter=lcov",
+    "update-browser-errors": "babel -o errors-browser.js errors.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/nodejs/readable-stream"
+  },
+  "keywords": [
+    "readable",
+    "stream",
+    "pipe"
+  ],
+  "browser": {
+    "util": false,
+    "worker_threads": false,
+    "./errors": "./errors-browser.js",
+    "./readable.js": "./readable-browser.js",
+    "./lib/internal/streams/from.js": "./lib/internal/streams/from-browser.js",
+    "./lib/internal/streams/stream.js": "./lib/internal/streams/stream-browser.js"
+  },
+  "nyc": {
+    "include": [
+      "lib/**.js"
+    ]
+  },
+  "license": "MIT"
+}
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/readable-browser.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/readable-browser.js
new file mode 100644
index 0000000..adbf60d
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/readable-browser.js
@@ -0,0 +1,9 @@
+exports = module.exports = require('./lib/_stream_readable.js');
+exports.Stream = exports;
+exports.Readable = exports;
+exports.Writable = require('./lib/_stream_writable.js');
+exports.Duplex = require('./lib/_stream_duplex.js');
+exports.Transform = require('./lib/_stream_transform.js');
+exports.PassThrough = require('./lib/_stream_passthrough.js');
+exports.finished = require('./lib/internal/streams/end-of-stream.js');
+exports.pipeline = require('./lib/internal/streams/pipeline.js');
diff --git a/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/readable.js b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/readable.js
new file mode 100644
index 0000000..9e0ca12
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/node_modules/readable-stream/readable.js
@@ -0,0 +1,16 @@
+var Stream = require('stream');
+if (process.env.READABLE_STREAM === 'disable' && Stream) {
+  module.exports = Stream.Readable;
+  Object.assign(module.exports, Stream);
+  module.exports.Stream = Stream;
+} else {
+  exports = module.exports = require('./lib/_stream_readable.js');
+  exports.Stream = Stream || exports;
+  exports.Readable = exports;
+  exports.Writable = require('./lib/_stream_writable.js');
+  exports.Duplex = require('./lib/_stream_duplex.js');
+  exports.Transform = require('./lib/_stream_transform.js');
+  exports.PassThrough = require('./lib/_stream_passthrough.js');
+  exports.finished = require('./lib/internal/streams/end-of-stream.js');
+  exports.pipeline = require('./lib/internal/streams/pipeline.js');
+}
diff --git a/mqtt-backend/node_modules/concat-stream/package.json b/mqtt-backend/node_modules/concat-stream/package.json
new file mode 100644
index 0000000..3797828
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/package.json
@@ -0,0 +1,55 @@
+{
+  "name": "concat-stream",
+  "version": "2.0.0",
+  "description": "writable stream that concatenates strings or binary data and calls a callback with the result",
+  "tags": [
+    "stream",
+    "simple",
+    "util",
+    "utility"
+  ],
+  "author": "Max Ogden <max@maxogden.com>",
+  "repository": {
+    "type": "git",
+    "url": "http://github.com/maxogden/concat-stream.git"
+  },
+  "bugs": {
+    "url": "http://github.com/maxogden/concat-stream/issues"
+  },
+  "engines": [
+    "node >= 6.0"
+  ],
+  "main": "index.js",
+  "files": [
+    "index.js"
+  ],
+  "scripts": {
+    "test": "tape test/*.js test/server/*.js"
+  },
+  "license": "MIT",
+  "dependencies": {
+    "buffer-from": "^1.0.0",
+    "inherits": "^2.0.3",
+    "readable-stream": "^3.0.2",
+    "typedarray": "^0.0.6"
+  },
+  "devDependencies": {
+    "tape": "^4.6.3"
+  },
+  "testling": {
+    "files": "test/*.js",
+    "browsers": [
+      "ie/8..latest",
+      "firefox/17..latest",
+      "firefox/nightly",
+      "chrome/22..latest",
+      "chrome/canary",
+      "opera/12..latest",
+      "opera/next",
+      "safari/5.1..latest",
+      "ipad/6.0..latest",
+      "iphone/6.0..latest",
+      "android-browser/4.2..latest"
+    ]
+  }
+}
diff --git a/mqtt-backend/node_modules/concat-stream/readme.md b/mqtt-backend/node_modules/concat-stream/readme.md
new file mode 100644
index 0000000..7aa19c4
--- /dev/null
+++ b/mqtt-backend/node_modules/concat-stream/readme.md
@@ -0,0 +1,102 @@
+# concat-stream
+
+Writable stream that concatenates all the data from a stream and calls a callback with the result. Use this when you want to collect all the data from a stream into a single buffer.
+
+[![Build Status](https://travis-ci.org/maxogden/concat-stream.svg?branch=master)](https://travis-ci.org/maxogden/concat-stream)
+
+[![NPM](https://nodei.co/npm/concat-stream.png)](https://nodei.co/npm/concat-stream/)
+
+### description
+
+Streams emit many buffers. If you want to collect all of the buffers, and when the stream ends concatenate all of the buffers together and receive a single buffer then this is the module for you.
+
+Only use this if you know you can fit all of the output of your stream into a single Buffer (e.g. in RAM).
+
+There are also `objectMode` streams that emit things other than Buffers, and you can concatenate these too. See below for details.
+
+## Related
+
+`concat-stream` is part of the [mississippi stream utility collection](https://github.com/maxogden/mississippi) which includes more useful stream modules similar to this one.
+
+### examples
+
+#### Buffers
+
+```js
+var fs = require('fs')
+var concat = require('concat-stream')
+
+var readStream = fs.createReadStream('cat.png')
+var concatStream = concat(gotPicture)
+
+readStream.on('error', handleError)
+readStream.pipe(concatStream)
+
+function gotPicture(imageBuffer) {
+  // imageBuffer is all of `cat.png` as a node.js Buffer
+}
+
+function handleError(err) {
+  // handle your error appropriately here, e.g.:
+  console.error(err) // print the error to STDERR
+  process.exit(1) // exit program with non-zero exit code
+}
+
+```
+
+#### Arrays
+
+```js
+var write = concat(function(data) {})
+write.write([1,2,3])
+write.write([4,5,6])
+write.end()
+// data will be [1,2,3,4,5,6] in the above callback
+```
+
+#### Uint8Arrays
+
+```js
+var write = concat(function(data) {})
+var a = new Uint8Array(3)
+a[0] = 97; a[1] = 98; a[2] = 99
+write.write(a)
+write.write('!')
+write.end(Buffer.from('!!1'))
+```
+
+See `test/` for more examples
+
+# methods
+
+```js
+var concat = require('concat-stream')
+```
+
+## var writable = concat(opts={}, cb)
+
+Return a `writable` stream that will fire `cb(data)` with all of the data that
+was written to the stream. Data can be written to `writable` as strings,
+Buffers, arrays of byte integers, and Uint8Arrays. 
+
+By default `concat-stream` will give you back the same data type as the type of the first buffer written to the stream. Use `opts.encoding` to set what format `data` should be returned as, e.g. if you if you don't want to rely on the built-in type checking or for some other reason.
+
+* `string` - get a string
+* `buffer` - get back a Buffer
+* `array` - get an array of byte integers
+* `uint8array`, `u8`, `uint8` - get back a Uint8Array
+* `object`, get back an array of Objects
+
+If you don't specify an encoding, and the types can't be inferred (e.g. you write things that aren't in the list above), it will try to convert concat them into a `Buffer`.
+
+If nothing is written to `writable` then `data` will be an empty array `[]`.
+
+# error handling
+
+`concat-stream` does not handle errors for you, so you must handle errors on whatever streams you pipe into `concat-stream`. This is a general rule when programming with node.js streams: always handle errors on each and every stream. Since `concat-stream` is not itself a stream it does not emit errors.
+
+We recommend using [`end-of-stream`](https://npmjs.org/end-of-stream) or [`pump`](https://npmjs.org/pump) for writing error tolerant stream code.
+
+# license
+
+MIT LICENSE
diff --git a/mqtt-backend/node_modules/debug/LICENSE b/mqtt-backend/node_modules/debug/LICENSE
new file mode 100644
index 0000000..1a9820e
--- /dev/null
+++ b/mqtt-backend/node_modules/debug/LICENSE
@@ -0,0 +1,20 @@
+(The MIT License)
+
+Copyright (c) 2014-2017 TJ Holowaychuk <tj@vision-media.ca>
+Copyright (c) 2018-2021 Josh Junon
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+and associated documentation files (the 'Software'), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial
+portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
+LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
diff --git a/mqtt-backend/node_modules/debug/README.md b/mqtt-backend/node_modules/debug/README.md
new file mode 100644
index 0000000..9ebdfbf
--- /dev/null
+++ b/mqtt-backend/node_modules/debug/README.md
@@ -0,0 +1,481 @@
+# debug
+[![OpenCollective](https://opencollective.com/debug/backers/badge.svg)](#backers)
+[![OpenCollective](https://opencollective.com/debug/sponsors/badge.svg)](#sponsors)
+
+<img width="647" src="https://user-images.githubusercontent.com/71256/29091486-fa38524c-7c37-11e7-895f-e7ec8e1039b6.png">
+
+A tiny JavaScript debugging utility modelled after Node.js core's debugging
+technique. Works in Node.js and web browsers.
+
+## Installation
+
+```bash
+$ npm install debug
+```
+
+## Usage
+
+`debug` exposes a function; simply pass this function the name of your module, and it will return a decorated version of `console.error` for you to pass debug statements to. This will allow you to toggle the debug output for different parts of your module as well as the module as a whole.
+
+Example [_app.js_](./examples/node/app.js):
+
+```js
+var debug = require('debug')('http')
+  , http = require('http')
+  , name = 'My App';
+
+// fake app
+
+debug('booting %o', name);
+
+http.createServer(function(req, res){
+  debug(req.method + ' ' + req.url);
+  res.end('hello\n');
+}).listen(3000, function(){
+  debug('listening');
+});
+
+// fake worker of some kind
+
+require('./worker');
+```
+
+Example [_worker.js_](./examples/node/worker.js):
+
+```js
+var a = require('debug')('worker:a')
+  , b = require('debug')('worker:b');
+
+function work() {
+  a('doing lots of uninteresting work');
+  setTimeout(work, Math.random() * 1000);
+}
+
+work();
+
+function workb() {
+  b('doing some work');
+  setTimeout(workb, Math.random() * 2000);
+}
+
+workb();
+```
+
+The `DEBUG` environment variable is then used to enable these based on space or
+comma-delimited names.
+
+Here are some examples:
+
+<img width="647" alt="screen shot 2017-08-08 at 12 53 04 pm" src="https://user-images.githubusercontent.com/71256/29091703-a6302cdc-7c38-11e7-8304-7c0b3bc600cd.png">
+<img width="647" alt="screen shot 2017-08-08 at 12 53 38 pm" src="https://user-images.githubusercontent.com/71256/29091700-a62a6888-7c38-11e7-800b-db911291ca2b.png">
+<img width="647" alt="screen shot 2017-08-08 at 12 53 25 pm" src="https://user-images.githubusercontent.com/71256/29091701-a62ea114-7c38-11e7-826a-2692bedca740.png">
+
+#### Windows command prompt notes
+
+##### CMD
+
+On Windows the environment variable is set using the `set` command.
+
+```cmd
+set DEBUG=*,-not_this
+```
+
+Example:
+
+```cmd
+set DEBUG=* & node app.js
+```
+
+##### PowerShell (VS Code default)
+
+PowerShell uses different syntax to set environment variables.
+
+```cmd
+$env:DEBUG = "*,-not_this"
+```
+
+Example:
+
+```cmd
+$env:DEBUG='app';node app.js
+```
+
+Then, run the program to be debugged as usual.
+
+npm script example:
+```js
+  "windowsDebug": "@powershell -Command $env:DEBUG='*';node app.js",
+```
+
+## Namespace Colors
+
+Every debug instance has a color generated for it based on its namespace name.
+This helps when visually parsing the debug output to identify which debug instance
+a debug line belongs to.
+
+#### Node.js
+
+In Node.js, colors are enabled when stderr is a TTY. You also _should_ install
+the [`supports-color`](https://npmjs.org/supports-color) module alongside debug,
+otherwise debug will only use a small handful of basic colors.
+
+<img width="521" src="https://user-images.githubusercontent.com/71256/29092181-47f6a9e6-7c3a-11e7-9a14-1928d8a711cd.png">
+
+#### Web Browser
+
+Colors are also enabled on "Web Inspectors" that understand the `%c` formatting
+option. These are WebKit web inspectors, Firefox ([since version
+31](https://hacks.mozilla.org/2014/05/editable-box-model-multiple-selection-sublime-text-keys-much-more-firefox-developer-tools-episode-31/))
+and the Firebug plugin for Firefox (any version).
+
+<img width="524" src="https://user-images.githubusercontent.com/71256/29092033-b65f9f2e-7c39-11e7-8e32-f6f0d8e865c1.png">
+
+
+## Millisecond diff
+
+When actively developing an application it can be useful to see when the time spent between one `debug()` call and the next. Suppose for example you invoke `debug()` before requesting a resource, and after as well, the "+NNNms" will show you how much time was spent between calls.
+
+<img width="647" src="https://user-images.githubusercontent.com/71256/29091486-fa38524c-7c37-11e7-895f-e7ec8e1039b6.png">
+
+When stdout is not a TTY, `Date#toISOString()` is used, making it more useful for logging the debug information as shown below:
+
+<img width="647" src="https://user-images.githubusercontent.com/71256/29091956-6bd78372-7c39-11e7-8c55-c948396d6edd.png">
+
+
+## Conventions
+
+If you're using this in one or more of your libraries, you _should_ use the name of your library so that developers may toggle debugging as desired without guessing names. If you have more than one debuggers you _should_ prefix them with your library name and use ":" to separate features. For example "bodyParser" from Connect would then be "connect:bodyParser".  If you append a "*" to the end of your name, it will always be enabled regardless of the setting of the DEBUG environment variable.  You can then use it for normal output as well as debug output.
+
+## Wildcards
+
+The `*` character may be used as a wildcard. Suppose for example your library has
+debuggers named "connect:bodyParser", "connect:compress", "connect:session",
+instead of listing all three with
+`DEBUG=connect:bodyParser,connect:compress,connect:session`, you may simply do
+`DEBUG=connect:*`, or to run everything using this module simply use `DEBUG=*`.
+
+You can also exclude specific debuggers by prefixing them with a "-" character.
+For example, `DEBUG=*,-connect:*` would include all debuggers except those
+starting with "connect:".
+
+## Environment Variables
+
+When running through Node.js, you can set a few environment variables that will
+change the behavior of the debug logging:
+
+| Name      | Purpose                                         |
+|-----------|-------------------------------------------------|
+| `DEBUG`   | Enables/disables specific debugging namespaces. |
+| `DEBUG_HIDE_DATE` | Hide date from debug output (non-TTY).  |
+| `DEBUG_COLORS`| Whether or not to use colors in the debug output. |
+| `DEBUG_DEPTH` | Object inspection depth.                    |
+| `DEBUG_SHOW_HIDDEN` | Shows hidden properties on inspected objects. |
+
+
+__Note:__ The environment variables beginning with `DEBUG_` end up being
+converted into an Options object that gets used with `%o`/`%O` formatters.
+See the Node.js documentation for
+[`util.inspect()`](https://nodejs.org/api/util.html#util_util_inspect_object_options)
+for the complete list.
+
+## Formatters
+
+Debug uses [printf-style](https://wikipedia.org/wiki/Printf_format_string) formatting.
+Below are the officially supported formatters:
+
+| Formatter | Representation |
+|-----------|----------------|
+| `%O`      | Pretty-print an Object on multiple lines. |
+| `%o`      | Pretty-print an Object all on a single line. |
+| `%s`      | String. |
+| `%d`      | Number (both integer and float). |
+| `%j`      | JSON. Replaced with the string '[Circular]' if the argument contains circular references. |
+| `%%`      | Single percent sign ('%'). This does not consume an argument. |
+
+
+### Custom formatters
+
+You can add custom formatters by extending the `debug.formatters` object.
+For example, if you wanted to add support for rendering a Buffer as hex with
+`%h`, you could do something like:
+
+```js
+const createDebug = require('debug')
+createDebug.formatters.h = (v) => {
+  return v.toString('hex')
+}
+
+// …elsewhere
+const debug = createDebug('foo')
+debug('this is hex: %h', new Buffer('hello world'))
+//   foo this is hex: 68656c6c6f20776f726c6421 +0ms
+```
+
+
+## Browser Support
+
+You can build a browser-ready script using [browserify](https://github.com/substack/node-browserify),
+or just use the [browserify-as-a-service](https://wzrd.in/) [build](https://wzrd.in/standalone/debug@latest),
+if you don't want to build it yourself.
+
+Debug's enable state is currently persisted by `localStorage`.
+Consider the situation shown below where you have `worker:a` and `worker:b`,
+and wish to debug both. You can enable this using `localStorage.debug`:
+
+```js
+localStorage.debug = 'worker:*'
+```
+
+And then refresh the page.
+
+```js
+a = debug('worker:a');
+b = debug('worker:b');
+
+setInterval(function(){
+  a('doing some work');
+}, 1000);
+
+setInterval(function(){
+  b('doing some work');
+}, 1200);
+```
+
+In Chromium-based web browsers (e.g. Brave, Chrome, and Electron), the JavaScript console will—by default—only show messages logged by `debug` if the "Verbose" log level is _enabled_.
+
+<img width="647" src="https://user-images.githubusercontent.com/7143133/152083257-29034707-c42c-4959-8add-3cee850e6fcf.png">
+
+## Output streams
+
+  By default `debug` will log to stderr, however this can be configured per-namespace by overriding the `log` method:
+
+Example [_stdout.js_](./examples/node/stdout.js):
+
+```js
+var debug = require('debug');
+var error = debug('app:error');
+
+// by default stderr is used
+error('goes to stderr!');
+
+var log = debug('app:log');
+// set this namespace to log via console.log
+log.log = console.log.bind(console); // don't forget to bind to console!
+log('goes to stdout');
+error('still goes to stderr!');
+
+// set all output to go via console.info
+// overrides all per-namespace log settings
+debug.log = console.info.bind(console);
+error('now goes to stdout via console.info');
+log('still goes to stdout, but via console.info now');
+```
+
+## Extend
+You can simply extend debugger 
+```js
+const log = require('debug')('auth');
+
+//creates new debug instance with extended namespace
+const logSign = log.extend('sign');
+const logLogin = log.extend('login');
+
+log('hello'); // auth hello
+logSign('hello'); //auth:sign hello
+logLogin('hello'); //auth:login hello
+```
+
+## Set dynamically
+
+You can also enable debug dynamically by calling the `enable()` method :
+
+```js
+let debug = require('debug');
+
+console.log(1, debug.enabled('test'));
+
+debug.enable('test');
+console.log(2, debug.enabled('test'));
+
+debug.disable();
+console.log(3, debug.enabled('test'));
+
+```
+
+print :   
+```
+1 false
+2 true
+3 false
+```
+
+Usage :  
+`enable(namespaces)`  
+`namespaces` can include modes separated by a colon and wildcards.
+   
+Note that calling `enable()` completely overrides previously set DEBUG variable : 
+
+```
+$ DEBUG=foo node -e 'var dbg = require("debug"); dbg.enable("bar"); console.log(dbg.enabled("foo"))'
+=> false
+```
+
+`disable()`
+
+Will disable all namespaces. The functions returns the namespaces currently
+enabled (and skipped). This can be useful if you want to disable debugging
+temporarily without knowing what was enabled to begin with.
+
+For example:
+
+```js
+let debug = require('debug');
+debug.enable('foo:*,-foo:bar');
+let namespaces = debug.disable();
+debug.enable(namespaces);
+```
+
+Note: There is no guarantee that the string will be identical to the initial
+enable string, but semantically they will be identical.
+
+## Checking whether a debug target is enabled
+
+After you've created a debug instance, you can determine whether or not it is
+enabled by checking the `enabled` property:
+
+```javascript
+const debug = require('debug')('http');
+
+if (debug.enabled) {
+  // do stuff...
+}
+```
+
+You can also manually toggle this property to force the debug instance to be
+enabled or disabled.
+
+## Usage in child processes
+
+Due to the way `debug` detects if the output is a TTY or not, colors are not shown in child processes when `stderr` is piped. A solution is to pass the `DEBUG_COLORS=1` environment variable to the child process.  
+For example:
+
+```javascript
+worker = fork(WORKER_WRAP_PATH, [workerPath], {
+  stdio: [
+    /* stdin: */ 0,
+    /* stdout: */ 'pipe',
+    /* stderr: */ 'pipe',
+    'ipc',
+  ],
+  env: Object.assign({}, process.env, {
+    DEBUG_COLORS: 1 // without this settings, colors won't be shown
+  }),
+});
+
+worker.stderr.pipe(process.stderr, { end: false });
+```
+
+
+## Authors
+
+ - TJ Holowaychuk
+ - Nathan Rajlich
+ - Andrew Rhyne
+ - Josh Junon
+
+## Backers
+
+Support us with a monthly donation and help us continue our activities. [[Become a backer](https://opencollective.com/debug#backer)]
+
+<a href="https://opencollective.com/debug/backer/0/website" target="_blank"><img src="https://opencollective.com/debug/backer/0/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/1/website" target="_blank"><img src="https://opencollective.com/debug/backer/1/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/2/website" target="_blank"><img src="https://opencollective.com/debug/backer/2/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/3/website" target="_blank"><img src="https://opencollective.com/debug/backer/3/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/4/website" target="_blank"><img src="https://opencollective.com/debug/backer/4/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/5/website" target="_blank"><img src="https://opencollective.com/debug/backer/5/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/6/website" target="_blank"><img src="https://opencollective.com/debug/backer/6/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/7/website" target="_blank"><img src="https://opencollective.com/debug/backer/7/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/8/website" target="_blank"><img src="https://opencollective.com/debug/backer/8/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/9/website" target="_blank"><img src="https://opencollective.com/debug/backer/9/avatar.svg"></a>
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+<a href="https://opencollective.com/debug/backer/17/website" target="_blank"><img src="https://opencollective.com/debug/backer/17/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/18/website" target="_blank"><img src="https://opencollective.com/debug/backer/18/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/19/website" target="_blank"><img src="https://opencollective.com/debug/backer/19/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/20/website" target="_blank"><img src="https://opencollective.com/debug/backer/20/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/21/website" target="_blank"><img src="https://opencollective.com/debug/backer/21/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/22/website" target="_blank"><img src="https://opencollective.com/debug/backer/22/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/23/website" target="_blank"><img src="https://opencollective.com/debug/backer/23/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/24/website" target="_blank"><img src="https://opencollective.com/debug/backer/24/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/25/website" target="_blank"><img src="https://opencollective.com/debug/backer/25/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/26/website" target="_blank"><img src="https://opencollective.com/debug/backer/26/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/27/website" target="_blank"><img src="https://opencollective.com/debug/backer/27/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/28/website" target="_blank"><img src="https://opencollective.com/debug/backer/28/avatar.svg"></a>
+<a href="https://opencollective.com/debug/backer/29/website" target="_blank"><img src="https://opencollective.com/debug/backer/29/avatar.svg"></a>
+
+
+## Sponsors
+
+Become a sponsor and get your logo on our README on Github with a link to your site. [[Become a sponsor](https://opencollective.com/debug#sponsor)]
+
+<a href="https://opencollective.com/debug/sponsor/0/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/0/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/1/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/1/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/2/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/2/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/3/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/3/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/4/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/4/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/5/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/5/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/6/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/6/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/7/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/7/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/8/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/8/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/9/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/9/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/10/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/10/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/11/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/11/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/12/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/12/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/13/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/13/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/14/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/14/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/15/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/15/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/16/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/16/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/17/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/17/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/18/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/18/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/19/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/19/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/20/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/20/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/21/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/21/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/22/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/22/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/23/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/23/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/24/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/24/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/25/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/25/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/26/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/26/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/27/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/27/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/28/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/28/avatar.svg"></a>
+<a href="https://opencollective.com/debug/sponsor/29/website" target="_blank"><img src="https://opencollective.com/debug/sponsor/29/avatar.svg"></a>
+
+## License
+
+(The MIT License)
+
+Copyright (c) 2014-2017 TJ Holowaychuk &lt;tj@vision-media.ca&gt;
+Copyright (c) 2018-2021 Josh Junon
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/debug/package.json b/mqtt-backend/node_modules/debug/package.json
new file mode 100644
index 0000000..ee8abb5
--- /dev/null
+++ b/mqtt-backend/node_modules/debug/package.json
@@ -0,0 +1,64 @@
+{
+  "name": "debug",
+  "version": "4.4.3",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/debug-js/debug.git"
+  },
+  "description": "Lightweight debugging utility for Node.js and the browser",
+  "keywords": [
+    "debug",
+    "log",
+    "debugger"
+  ],
+  "files": [
+    "src",
+    "LICENSE",
+    "README.md"
+  ],
+  "author": "Josh Junon (https://github.com/qix-)",
+  "contributors": [
+    "TJ Holowaychuk <tj@vision-media.ca>",
+    "Nathan Rajlich <nathan@tootallnate.net> (http://n8.io)",
+    "Andrew Rhyne <rhyneandrew@gmail.com>"
+  ],
+  "license": "MIT",
+  "scripts": {
+    "lint": "xo",
+    "test": "npm run test:node && npm run test:browser && npm run lint",
+    "test:node": "mocha test.js test.node.js",
+    "test:browser": "karma start --single-run",
+    "test:coverage": "cat ./coverage/lcov.info | coveralls"
+  },
+  "dependencies": {
+    "ms": "^2.1.3"
+  },
+  "devDependencies": {
+    "brfs": "^2.0.1",
+    "browserify": "^16.2.3",
+    "coveralls": "^3.0.2",
+    "karma": "^3.1.4",
+    "karma-browserify": "^6.0.0",
+    "karma-chrome-launcher": "^2.2.0",
+    "karma-mocha": "^1.3.0",
+    "mocha": "^5.2.0",
+    "mocha-lcov-reporter": "^1.2.0",
+    "sinon": "^14.0.0",
+    "xo": "^0.23.0"
+  },
+  "peerDependenciesMeta": {
+    "supports-color": {
+      "optional": true
+    }
+  },
+  "main": "./src/index.js",
+  "browser": "./src/browser.js",
+  "engines": {
+    "node": ">=6.0"
+  },
+  "xo": {
+    "rules": {
+      "import/extensions": "off"
+    }
+  }
+}
diff --git a/mqtt-backend/node_modules/debug/src/browser.js b/mqtt-backend/node_modules/debug/src/browser.js
new file mode 100644
index 0000000..5993451
--- /dev/null
+++ b/mqtt-backend/node_modules/debug/src/browser.js
@@ -0,0 +1,272 @@
+/* eslint-env browser */
+
+/**
+ * This is the web browser implementation of `debug()`.
+ */
+
+exports.formatArgs = formatArgs;
+exports.save = save;
+exports.load = load;
+exports.useColors = useColors;
+exports.storage = localstorage();
+exports.destroy = (() => {
+	let warned = false;
+
+	return () => {
+		if (!warned) {
+			warned = true;
+			console.warn('Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.');
+		}
+	};
+})();
+
+/**
+ * Colors.
+ */
+
+exports.colors = [
+	'#0000CC',
+	'#0000FF',
+	'#0033CC',
+	'#0033FF',
+	'#0066CC',
+	'#0066FF',
+	'#0099CC',
+	'#0099FF',
+	'#00CC00',
+	'#00CC33',
+	'#00CC66',
+	'#00CC99',
+	'#00CCCC',
+	'#00CCFF',
+	'#3300CC',
+	'#3300FF',
+	'#3333CC',
+	'#3333FF',
+	'#3366CC',
+	'#3366FF',
+	'#3399CC',
+	'#3399FF',
+	'#33CC00',
+	'#33CC33',
+	'#33CC66',
+	'#33CC99',
+	'#33CCCC',
+	'#33CCFF',
+	'#6600CC',
+	'#6600FF',
+	'#6633CC',
+	'#6633FF',
+	'#66CC00',
+	'#66CC33',
+	'#9900CC',
+	'#9900FF',
+	'#9933CC',
+	'#9933FF',
+	'#99CC00',
+	'#99CC33',
+	'#CC0000',
+	'#CC0033',
+	'#CC0066',
+	'#CC0099',
+	'#CC00CC',
+	'#CC00FF',
+	'#CC3300',
+	'#CC3333',
+	'#CC3366',
+	'#CC3399',
+	'#CC33CC',
+	'#CC33FF',
+	'#CC6600',
+	'#CC6633',
+	'#CC9900',
+	'#CC9933',
+	'#CCCC00',
+	'#CCCC33',
+	'#FF0000',
+	'#FF0033',
+	'#FF0066',
+	'#FF0099',
+	'#FF00CC',
+	'#FF00FF',
+	'#FF3300',
+	'#FF3333',
+	'#FF3366',
+	'#FF3399',
+	'#FF33CC',
+	'#FF33FF',
+	'#FF6600',
+	'#FF6633',
+	'#FF9900',
+	'#FF9933',
+	'#FFCC00',
+	'#FFCC33'
+];
+
+/**
+ * Currently only WebKit-based Web Inspectors, Firefox >= v31,
+ * and the Firebug extension (any Firefox version) are known
+ * to support "%c" CSS customizations.
+ *
+ * TODO: add a `localStorage` variable to explicitly enable/disable colors
+ */
+
+// eslint-disable-next-line complexity
+function useColors() {
+	// NB: In an Electron preload script, document will be defined but not fully
+	// initialized. Since we know we're in Chrome, we'll just detect this case
+	// explicitly
+	if (typeof window !== 'undefined' && window.process && (window.process.type === 'renderer' || window.process.__nwjs)) {
+		return true;
+	}
+
+	// Internet Explorer and Edge do not support colors.
+	if (typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
+		return false;
+	}
+
+	let m;
+
+	// Is webkit? http://stackoverflow.com/a/16459606/376773
+	// document is undefined in react-native: https://github.com/facebook/react-native/pull/1632
+	// eslint-disable-next-line no-return-assign
+	return (typeof document !== 'undefined' && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance) ||
+		// Is firebug? http://stackoverflow.com/a/398120/376773
+		(typeof window !== 'undefined' && window.console && (window.console.firebug || (window.console.exception && window.console.table))) ||
+		// Is firefox >= v31?
+		// https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
+		(typeof navigator !== 'undefined' && navigator.userAgent && (m = navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/)) && parseInt(m[1], 10) >= 31) ||
+		// Double check webkit in userAgent just in case we are in a worker
+		(typeof navigator !== 'undefined' && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/));
+}
+
+/**
+ * Colorize log arguments if enabled.
+ *
+ * @api public
+ */
+
+function formatArgs(args) {
+	args[0] = (this.useColors ? '%c' : '') +
+		this.namespace +
+		(this.useColors ? ' %c' : ' ') +
+		args[0] +
+		(this.useColors ? '%c ' : ' ') +
+		'+' + module.exports.humanize(this.diff);
+
+	if (!this.useColors) {
+		return;
+	}
+
+	const c = 'color: ' + this.color;
+	args.splice(1, 0, c, 'color: inherit');
+
+	// The final "%c" is somewhat tricky, because there could be other
+	// arguments passed either before or after the %c, so we need to
+	// figure out the correct index to insert the CSS into
+	let index = 0;
+	let lastC = 0;
+	args[0].replace(/%[a-zA-Z%]/g, match => {
+		if (match === '%%') {
+			return;
+		}
+		index++;
+		if (match === '%c') {
+			// We only are interested in the *last* %c
+			// (the user may have provided their own)
+			lastC = index;
+		}
+	});
+
+	args.splice(lastC, 0, c);
+}
+
+/**
+ * Invokes `console.debug()` when available.
+ * No-op when `console.debug` is not a "function".
+ * If `console.debug` is not available, falls back
+ * to `console.log`.
+ *
+ * @api public
+ */
+exports.log = console.debug || console.log || (() => {});
+
+/**
+ * Save `namespaces`.
+ *
+ * @param {String} namespaces
+ * @api private
+ */
+function save(namespaces) {
+	try {
+		if (namespaces) {
+			exports.storage.setItem('debug', namespaces);
+		} else {
+			exports.storage.removeItem('debug');
+		}
+	} catch (error) {
+		// Swallow
+		// XXX (@Qix-) should we be logging these?
+	}
+}
+
+/**
+ * Load `namespaces`.
+ *
+ * @return {String} returns the previously persisted debug modes
+ * @api private
+ */
+function load() {
+	let r;
+	try {
+		r = exports.storage.getItem('debug') || exports.storage.getItem('DEBUG') ;
+	} catch (error) {
+		// Swallow
+		// XXX (@Qix-) should we be logging these?
+	}
+
+	// If debug isn't set in LS, and we're in Electron, try to load $DEBUG
+	if (!r && typeof process !== 'undefined' && 'env' in process) {
+		r = process.env.DEBUG;
+	}
+
+	return r;
+}
+
+/**
+ * Localstorage attempts to return the localstorage.
+ *
+ * This is necessary because safari throws
+ * when a user disables cookies/localstorage
+ * and you attempt to access it.
+ *
+ * @return {LocalStorage}
+ * @api private
+ */
+
+function localstorage() {
+	try {
+		// TVMLKit (Apple TV JS Runtime) does not have a window object, just localStorage in the global context
+		// The Browser also has localStorage in the global context.
+		return localStorage;
+	} catch (error) {
+		// Swallow
+		// XXX (@Qix-) should we be logging these?
+	}
+}
+
+module.exports = require('./common')(exports);
+
+const {formatters} = module.exports;
+
+/**
+ * Map %j to `JSON.stringify()`, since no Web Inspectors do that by default.
+ */
+
+formatters.j = function (v) {
+	try {
+		return JSON.stringify(v);
+	} catch (error) {
+		return '[UnexpectedJSONParseError]: ' + error.message;
+	}
+};
diff --git a/mqtt-backend/node_modules/debug/src/common.js b/mqtt-backend/node_modules/debug/src/common.js
new file mode 100644
index 0000000..141cb57
--- /dev/null
+++ b/mqtt-backend/node_modules/debug/src/common.js
@@ -0,0 +1,292 @@
+
+/**
+ * This is the common logic for both the Node.js and web browser
+ * implementations of `debug()`.
+ */
+
+function setup(env) {
+	createDebug.debug = createDebug;
+	createDebug.default = createDebug;
+	createDebug.coerce = coerce;
+	createDebug.disable = disable;
+	createDebug.enable = enable;
+	createDebug.enabled = enabled;
+	createDebug.humanize = require('ms');
+	createDebug.destroy = destroy;
+
+	Object.keys(env).forEach(key => {
+		createDebug[key] = env[key];
+	});
+
+	/**
+	* The currently active debug mode names, and names to skip.
+	*/
+
+	createDebug.names = [];
+	createDebug.skips = [];
+
+	/**
+	* Map of special "%n" handling functions, for the debug "format" argument.
+	*
+	* Valid key names are a single, lower or upper-case letter, i.e. "n" and "N".
+	*/
+	createDebug.formatters = {};
+
+	/**
+	* Selects a color for a debug namespace
+	* @param {String} namespace The namespace string for the debug instance to be colored
+	* @return {Number|String} An ANSI color code for the given namespace
+	* @api private
+	*/
+	function selectColor(namespace) {
+		let hash = 0;
+
+		for (let i = 0; i < namespace.length; i++) {
+			hash = ((hash << 5) - hash) + namespace.charCodeAt(i);
+			hash |= 0; // Convert to 32bit integer
+		}
+
+		return createDebug.colors[Math.abs(hash) % createDebug.colors.length];
+	}
+	createDebug.selectColor = selectColor;
+
+	/**
+	* Create a debugger with the given `namespace`.
+	*
+	* @param {String} namespace
+	* @return {Function}
+	* @api public
+	*/
+	function createDebug(namespace) {
+		let prevTime;
+		let enableOverride = null;
+		let namespacesCache;
+		let enabledCache;
+
+		function debug(...args) {
+			// Disabled?
+			if (!debug.enabled) {
+				return;
+			}
+
+			const self = debug;
+
+			// Set `diff` timestamp
+			const curr = Number(new Date());
+			const ms = curr - (prevTime || curr);
+			self.diff = ms;
+			self.prev = prevTime;
+			self.curr = curr;
+			prevTime = curr;
+
+			args[0] = createDebug.coerce(args[0]);
+
+			if (typeof args[0] !== 'string') {
+				// Anything else let's inspect with %O
+				args.unshift('%O');
+			}
+
+			// Apply any `formatters` transformations
+			let index = 0;
+			args[0] = args[0].replace(/%([a-zA-Z%])/g, (match, format) => {
+				// If we encounter an escaped % then don't increase the array index
+				if (match === '%%') {
+					return '%';
+				}
+				index++;
+				const formatter = createDebug.formatters[format];
+				if (typeof formatter === 'function') {
+					const val = args[index];
+					match = formatter.call(self, val);
+
+					// Now we need to remove `args[index]` since it's inlined in the `format`
+					args.splice(index, 1);
+					index--;
+				}
+				return match;
+			});
+
+			// Apply env-specific formatting (colors, etc.)
+			createDebug.formatArgs.call(self, args);
+
+			const logFn = self.log || createDebug.log;
+			logFn.apply(self, args);
+		}
+
+		debug.namespace = namespace;
+		debug.useColors = createDebug.useColors();
+		debug.color = createDebug.selectColor(namespace);
+		debug.extend = extend;
+		debug.destroy = createDebug.destroy; // XXX Temporary. Will be removed in the next major release.
+
+		Object.defineProperty(debug, 'enabled', {
+			enumerable: true,
+			configurable: false,
+			get: () => {
+				if (enableOverride !== null) {
+					return enableOverride;
+				}
+				if (namespacesCache !== createDebug.namespaces) {
+					namespacesCache = createDebug.namespaces;
+					enabledCache = createDebug.enabled(namespace);
+				}
+
+				return enabledCache;
+			},
+			set: v => {
+				enableOverride = v;
+			}
+		});
+
+		// Env-specific initialization logic for debug instances
+		if (typeof createDebug.init === 'function') {
+			createDebug.init(debug);
+		}
+
+		return debug;
+	}
+
+	function extend(namespace, delimiter) {
+		const newDebug = createDebug(this.namespace + (typeof delimiter === 'undefined' ? ':' : delimiter) + namespace);
+		newDebug.log = this.log;
+		return newDebug;
+	}
+
+	/**
+	* Enables a debug mode by namespaces. This can include modes
+	* separated by a colon and wildcards.
+	*
+	* @param {String} namespaces
+	* @api public
+	*/
+	function enable(namespaces) {
+		createDebug.save(namespaces);
+		createDebug.namespaces = namespaces;
+
+		createDebug.names = [];
+		createDebug.skips = [];
+
+		const split = (typeof namespaces === 'string' ? namespaces : '')
+			.trim()
+			.replace(/\s+/g, ',')
+			.split(',')
+			.filter(Boolean);
+
+		for (const ns of split) {
+			if (ns[0] === '-') {
+				createDebug.skips.push(ns.slice(1));
+			} else {
+				createDebug.names.push(ns);
+			}
+		}
+	}
+
+	/**
+	 * Checks if the given string matches a namespace template, honoring
+	 * asterisks as wildcards.
+	 *
+	 * @param {String} search
+	 * @param {String} template
+	 * @return {Boolean}
+	 */
+	function matchesTemplate(search, template) {
+		let searchIndex = 0;
+		let templateIndex = 0;
+		let starIndex = -1;
+		let matchIndex = 0;
+
+		while (searchIndex < search.length) {
+			if (templateIndex < template.length && (template[templateIndex] === search[searchIndex] || template[templateIndex] === '*')) {
+				// Match character or proceed with wildcard
+				if (template[templateIndex] === '*') {
+					starIndex = templateIndex;
+					matchIndex = searchIndex;
+					templateIndex++; // Skip the '*'
+				} else {
+					searchIndex++;
+					templateIndex++;
+				}
+			} else if (starIndex !== -1) { // eslint-disable-line no-negated-condition
+				// Backtrack to the last '*' and try to match more characters
+				templateIndex = starIndex + 1;
+				matchIndex++;
+				searchIndex = matchIndex;
+			} else {
+				return false; // No match
+			}
+		}
+
+		// Handle trailing '*' in template
+		while (templateIndex < template.length && template[templateIndex] === '*') {
+			templateIndex++;
+		}
+
+		return templateIndex === template.length;
+	}
+
+	/**
+	* Disable debug output.
+	*
+	* @return {String} namespaces
+	* @api public
+	*/
+	function disable() {
+		const namespaces = [
+			...createDebug.names,
+			...createDebug.skips.map(namespace => '-' + namespace)
+		].join(',');
+		createDebug.enable('');
+		return namespaces;
+	}
+
+	/**
+	* Returns true if the given mode name is enabled, false otherwise.
+	*
+	* @param {String} name
+	* @return {Boolean}
+	* @api public
+	*/
+	function enabled(name) {
+		for (const skip of createDebug.skips) {
+			if (matchesTemplate(name, skip)) {
+				return false;
+			}
+		}
+
+		for (const ns of createDebug.names) {
+			if (matchesTemplate(name, ns)) {
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	/**
+	* Coerce `val`.
+	*
+	* @param {Mixed} val
+	* @return {Mixed}
+	* @api private
+	*/
+	function coerce(val) {
+		if (val instanceof Error) {
+			return val.stack || val.message;
+		}
+		return val;
+	}
+
+	/**
+	* XXX DO NOT USE. This is a temporary stub function.
+	* XXX It WILL be removed in the next major release.
+	*/
+	function destroy() {
+		console.warn('Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.');
+	}
+
+	createDebug.enable(createDebug.load());
+
+	return createDebug;
+}
+
+module.exports = setup;
diff --git a/mqtt-backend/node_modules/debug/src/index.js b/mqtt-backend/node_modules/debug/src/index.js
new file mode 100644
index 0000000..bf4c57f
--- /dev/null
+++ b/mqtt-backend/node_modules/debug/src/index.js
@@ -0,0 +1,10 @@
+/**
+ * Detect Electron renderer / nwjs process, which is node, but we should
+ * treat as a browser.
+ */
+
+if (typeof process === 'undefined' || process.type === 'renderer' || process.browser === true || process.__nwjs) {
+	module.exports = require('./browser.js');
+} else {
+	module.exports = require('./node.js');
+}
diff --git a/mqtt-backend/node_modules/debug/src/node.js b/mqtt-backend/node_modules/debug/src/node.js
new file mode 100644
index 0000000..715560a
--- /dev/null
+++ b/mqtt-backend/node_modules/debug/src/node.js
@@ -0,0 +1,263 @@
+/**
+ * Module dependencies.
+ */
+
+const tty = require('tty');
+const util = require('util');
+
+/**
+ * This is the Node.js implementation of `debug()`.
+ */
+
+exports.init = init;
+exports.log = log;
+exports.formatArgs = formatArgs;
+exports.save = save;
+exports.load = load;
+exports.useColors = useColors;
+exports.destroy = util.deprecate(
+	() => {},
+	'Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.'
+);
+
+/**
+ * Colors.
+ */
+
+exports.colors = [6, 2, 3, 4, 5, 1];
+
+try {
+	// Optional dependency (as in, doesn't need to be installed, NOT like optionalDependencies in package.json)
+	// eslint-disable-next-line import/no-extraneous-dependencies
+	const supportsColor = require('supports-color');
+
+	if (supportsColor && (supportsColor.stderr || supportsColor).level >= 2) {
+		exports.colors = [
+			20,
+			21,
+			26,
+			27,
+			32,
+			33,
+			38,
+			39,
+			40,
+			41,
+			42,
+			43,
+			44,
+			45,
+			56,
+			57,
+			62,
+			63,
+			68,
+			69,
+			74,
+			75,
+			76,
+			77,
+			78,
+			79,
+			80,
+			81,
+			92,
+			93,
+			98,
+			99,
+			112,
+			113,
+			128,
+			129,
+			134,
+			135,
+			148,
+			149,
+			160,
+			161,
+			162,
+			163,
+			164,
+			165,
+			166,
+			167,
+			168,
+			169,
+			170,
+			171,
+			172,
+			173,
+			178,
+			179,
+			184,
+			185,
+			196,
+			197,
+			198,
+			199,
+			200,
+			201,
+			202,
+			203,
+			204,
+			205,
+			206,
+			207,
+			208,
+			209,
+			214,
+			215,
+			220,
+			221
+		];
+	}
+} catch (error) {
+	// Swallow - we only care if `supports-color` is available; it doesn't have to be.
+}
+
+/**
+ * Build up the default `inspectOpts` object from the environment variables.
+ *
+ *   $ DEBUG_COLORS=no DEBUG_DEPTH=10 DEBUG_SHOW_HIDDEN=enabled node script.js
+ */
+
+exports.inspectOpts = Object.keys(process.env).filter(key => {
+	return /^debug_/i.test(key);
+}).reduce((obj, key) => {
+	// Camel-case
+	const prop = key
+		.substring(6)
+		.toLowerCase()
+		.replace(/_([a-z])/g, (_, k) => {
+			return k.toUpperCase();
+		});
+
+	// Coerce string value into JS value
+	let val = process.env[key];
+	if (/^(yes|on|true|enabled)$/i.test(val)) {
+		val = true;
+	} else if (/^(no|off|false|disabled)$/i.test(val)) {
+		val = false;
+	} else if (val === 'null') {
+		val = null;
+	} else {
+		val = Number(val);
+	}
+
+	obj[prop] = val;
+	return obj;
+}, {});
+
+/**
+ * Is stdout a TTY? Colored output is enabled when `true`.
+ */
+
+function useColors() {
+	return 'colors' in exports.inspectOpts ?
+		Boolean(exports.inspectOpts.colors) :
+		tty.isatty(process.stderr.fd);
+}
+
+/**
+ * Adds ANSI color escape codes if enabled.
+ *
+ * @api public
+ */
+
+function formatArgs(args) {
+	const {namespace: name, useColors} = this;
+
+	if (useColors) {
+		const c = this.color;
+		const colorCode = '\u001B[3' + (c < 8 ? c : '8;5;' + c);
+		const prefix = `  ${colorCode};1m${name} \u001B[0m`;
+
+		args[0] = prefix + args[0].split('\n').join('\n' + prefix);
+		args.push(colorCode + 'm+' + module.exports.humanize(this.diff) + '\u001B[0m');
+	} else {
+		args[0] = getDate() + name + ' ' + args[0];
+	}
+}
+
+function getDate() {
+	if (exports.inspectOpts.hideDate) {
+		return '';
+	}
+	return new Date().toISOString() + ' ';
+}
+
+/**
+ * Invokes `util.formatWithOptions()` with the specified arguments and writes to stderr.
+ */
+
+function log(...args) {
+	return process.stderr.write(util.formatWithOptions(exports.inspectOpts, ...args) + '\n');
+}
+
+/**
+ * Save `namespaces`.
+ *
+ * @param {String} namespaces
+ * @api private
+ */
+function save(namespaces) {
+	if (namespaces) {
+		process.env.DEBUG = namespaces;
+	} else {
+		// If you set a process.env field to null or undefined, it gets cast to the
+		// string 'null' or 'undefined'. Just delete instead.
+		delete process.env.DEBUG;
+	}
+}
+
+/**
+ * Load `namespaces`.
+ *
+ * @return {String} returns the previously persisted debug modes
+ * @api private
+ */
+
+function load() {
+	return process.env.DEBUG;
+}
+
+/**
+ * Init logic for `debug` instances.
+ *
+ * Create a new `inspectOpts` object in case `useColors` is set
+ * differently for a particular `debug` instance.
+ */
+
+function init(debug) {
+	debug.inspectOpts = {};
+
+	const keys = Object.keys(exports.inspectOpts);
+	for (let i = 0; i < keys.length; i++) {
+		debug.inspectOpts[keys[i]] = exports.inspectOpts[keys[i]];
+	}
+}
+
+module.exports = require('./common')(exports);
+
+const {formatters} = module.exports;
+
+/**
+ * Map %o to `util.inspect()`, all on a single line.
+ */
+
+formatters.o = function (v) {
+	this.inspectOpts.colors = this.useColors;
+	return util.inspect(v, this.inspectOpts)
+		.split('\n')
+		.map(str => str.trim())
+		.join(' ');
+};
+
+/**
+ * Map %O to `util.inspect()`, allowing multiple lines if needed.
+ */
+
+formatters.O = function (v) {
+	this.inspectOpts.colors = this.useColors;
+	return util.inspect(v, this.inspectOpts);
+};
diff --git a/mqtt-backend/node_modules/end-of-stream/LICENSE b/mqtt-backend/node_modules/end-of-stream/LICENSE
new file mode 100644
index 0000000..757562e
--- /dev/null
+++ b/mqtt-backend/node_modules/end-of-stream/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Mathias Buus
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/end-of-stream/README.md b/mqtt-backend/node_modules/end-of-stream/README.md
new file mode 100644
index 0000000..857b14b
--- /dev/null
+++ b/mqtt-backend/node_modules/end-of-stream/README.md
@@ -0,0 +1,54 @@
+# end-of-stream
+
+A node module that calls a callback when a readable/writable/duplex stream has completed or failed.
+
+	npm install end-of-stream
+
+[![Build status](https://travis-ci.org/mafintosh/end-of-stream.svg?branch=master)](https://travis-ci.org/mafintosh/end-of-stream)
+
+## Usage
+
+Simply pass a stream and a callback to the `eos`.
+Both legacy streams, streams2 and stream3 are supported.
+
+``` js
+var eos = require('end-of-stream');
+
+eos(readableStream, function(err) {
+  // this will be set to the stream instance
+	if (err) return console.log('stream had an error or closed early');
+	console.log('stream has ended', this === readableStream);
+});
+
+eos(writableStream, function(err) {
+	if (err) return console.log('stream had an error or closed early');
+	console.log('stream has finished', this === writableStream);
+});
+
+eos(duplexStream, function(err) {
+	if (err) return console.log('stream had an error or closed early');
+	console.log('stream has ended and finished', this === duplexStream);
+});
+
+eos(duplexStream, {readable:false}, function(err) {
+	if (err) return console.log('stream had an error or closed early');
+	console.log('stream has finished but might still be readable');
+});
+
+eos(duplexStream, {writable:false}, function(err) {
+	if (err) return console.log('stream had an error or closed early');
+	console.log('stream has ended but might still be writable');
+});
+
+eos(readableStream, {error:false}, function(err) {
+	// do not treat emit('error', err) as a end-of-stream
+});
+```
+
+## License
+
+MIT
+
+## Related
+
+`end-of-stream` is part of the [mississippi stream utility collection](https://github.com/maxogden/mississippi) which includes more useful stream modules similar to this one.
diff --git a/mqtt-backend/node_modules/end-of-stream/index.js b/mqtt-backend/node_modules/end-of-stream/index.js
new file mode 100644
index 0000000..7ce47e9
--- /dev/null
+++ b/mqtt-backend/node_modules/end-of-stream/index.js
@@ -0,0 +1,96 @@
+var once = require('once');
+
+var noop = function() {};
+
+var qnt = global.Bare ? queueMicrotask : process.nextTick.bind(process);
+
+var isRequest = function(stream) {
+	return stream.setHeader && typeof stream.abort === 'function';
+};
+
+var isChildProcess = function(stream) {
+	return stream.stdio && Array.isArray(stream.stdio) && stream.stdio.length === 3
+};
+
+var eos = function(stream, opts, callback) {
+	if (typeof opts === 'function') return eos(stream, null, opts);
+	if (!opts) opts = {};
+
+	callback = once(callback || noop);
+
+	var ws = stream._writableState;
+	var rs = stream._readableState;
+	var readable = opts.readable || (opts.readable !== false && stream.readable);
+	var writable = opts.writable || (opts.writable !== false && stream.writable);
+	var cancelled = false;
+
+	var onlegacyfinish = function() {
+		if (!stream.writable) onfinish();
+	};
+
+	var onfinish = function() {
+		writable = false;
+		if (!readable) callback.call(stream);
+	};
+
+	var onend = function() {
+		readable = false;
+		if (!writable) callback.call(stream);
+	};
+
+	var onexit = function(exitCode) {
+		callback.call(stream, exitCode ? new Error('exited with error code: ' + exitCode) : null);
+	};
+
+	var onerror = function(err) {
+		callback.call(stream, err);
+	};
+
+	var onclose = function() {
+		qnt(onclosenexttick);
+	};
+
+	var onclosenexttick = function() {
+		if (cancelled) return;
+		if (readable && !(rs && (rs.ended && !rs.destroyed))) return callback.call(stream, new Error('premature close'));
+		if (writable && !(ws && (ws.ended && !ws.destroyed))) return callback.call(stream, new Error('premature close'));
+	};
+
+	var onrequest = function() {
+		stream.req.on('finish', onfinish);
+	};
+
+	if (isRequest(stream)) {
+		stream.on('complete', onfinish);
+		stream.on('abort', onclose);
+		if (stream.req) onrequest();
+		else stream.on('request', onrequest);
+	} else if (writable && !ws) { // legacy streams
+		stream.on('end', onlegacyfinish);
+		stream.on('close', onlegacyfinish);
+	}
+
+	if (isChildProcess(stream)) stream.on('exit', onexit);
+
+	stream.on('end', onend);
+	stream.on('finish', onfinish);
+	if (opts.error !== false) stream.on('error', onerror);
+	stream.on('close', onclose);
+
+	return function() {
+		cancelled = true;
+		stream.removeListener('complete', onfinish);
+		stream.removeListener('abort', onclose);
+		stream.removeListener('request', onrequest);
+		if (stream.req) stream.req.removeListener('finish', onfinish);
+		stream.removeListener('end', onlegacyfinish);
+		stream.removeListener('close', onlegacyfinish);
+		stream.removeListener('finish', onfinish);
+		stream.removeListener('exit', onexit);
+		stream.removeListener('end', onend);
+		stream.removeListener('error', onerror);
+		stream.removeListener('close', onclose);
+	};
+};
+
+module.exports = eos;
diff --git a/mqtt-backend/node_modules/end-of-stream/package.json b/mqtt-backend/node_modules/end-of-stream/package.json
new file mode 100644
index 0000000..0b530cd
--- /dev/null
+++ b/mqtt-backend/node_modules/end-of-stream/package.json
@@ -0,0 +1,37 @@
+{
+  "name": "end-of-stream",
+  "version": "1.4.5",
+  "description": "Call a callback when a readable/writable/duplex stream has completed or failed.",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/mafintosh/end-of-stream.git"
+  },
+  "dependencies": {
+    "once": "^1.4.0"
+  },
+  "scripts": {
+    "test": "node test.js"
+  },
+  "files": [
+    "index.js"
+  ],
+  "keywords": [
+    "stream",
+    "streams",
+    "callback",
+    "finish",
+    "close",
+    "end",
+    "wait"
+  ],
+  "bugs": {
+    "url": "https://github.com/mafintosh/end-of-stream/issues"
+  },
+  "homepage": "https://github.com/mafintosh/end-of-stream",
+  "main": "index.js",
+  "author": "Mathias Buus <mathiasbuus@gmail.com>",
+  "license": "MIT",
+  "devDependencies": {
+    "tape": "^4.11.0"
+  }
+}
diff --git a/mqtt-backend/node_modules/event-target-shim/LICENSE b/mqtt-backend/node_modules/event-target-shim/LICENSE
new file mode 100644
index 0000000..c39e694
--- /dev/null
+++ b/mqtt-backend/node_modules/event-target-shim/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Toru Nagashima
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
diff --git a/mqtt-backend/node_modules/event-target-shim/README.md b/mqtt-backend/node_modules/event-target-shim/README.md
new file mode 100644
index 0000000..a4f9c1b
--- /dev/null
+++ b/mqtt-backend/node_modules/event-target-shim/README.md
@@ -0,0 +1,293 @@
+# event-target-shim
+
+[![npm version](https://img.shields.io/npm/v/event-target-shim.svg)](https://www.npmjs.com/package/event-target-shim)
+[![Downloads/month](https://img.shields.io/npm/dm/event-target-shim.svg)](http://www.npmtrends.com/event-target-shim)
+[![Build Status](https://travis-ci.org/mysticatea/event-target-shim.svg?branch=master)](https://travis-ci.org/mysticatea/event-target-shim)
+[![Coverage Status](https://codecov.io/gh/mysticatea/event-target-shim/branch/master/graph/badge.svg)](https://codecov.io/gh/mysticatea/event-target-shim)
+[![Dependency Status](https://david-dm.org/mysticatea/event-target-shim.svg)](https://david-dm.org/mysticatea/event-target-shim)
+
+An implementation of [WHATWG EventTarget interface](https://dom.spec.whatwg.org/#interface-eventtarget), plus few extensions.
+
+- This provides `EventTarget` constructor that can inherit for your custom object.
+- This provides an utility that defines properties of attribute listeners (e.g. `obj.onclick`).
+
+```js
+import {EventTarget, defineEventAttribute} from "event-target-shim"
+
+class Foo extends EventTarget {
+    // ...
+}
+
+// Define `foo.onhello` property.
+defineEventAttribute(Foo.prototype, "hello")
+
+// Use
+const foo = new Foo()
+foo.addEventListener("hello", e => console.log("hello", e))
+foo.onhello = e => console.log("onhello:", e)
+foo.dispatchEvent(new CustomEvent("hello"))
+```
+
+## 💿 Installation
+
+Use [npm](https://www.npmjs.com/) to install then use a bundler.
+
+```
+npm install event-target-shim
+```
+
+Or download from [`dist` directory](./dist).
+
+- [dist/event-target-shim.mjs](dist/event-target-shim.mjs) ... ES modules version.
+- [dist/event-target-shim.js](dist/event-target-shim.js) ... Common JS version.
+- [dist/event-target-shim.umd.js](dist/event-target-shim.umd.js) ... UMD (Universal Module Definition) version. This is transpiled by [Babel](https://babeljs.io/) for IE 11.
+
+## 📖 Usage
+
+```js
+import {EventTarget, defineEventAttribute} from "event-target-shim"
+// or
+const {EventTarget, defineEventAttribute} = require("event-target-shim")
+
+// or UMD version defines a global variable:
+const {EventTarget, defineEventAttribute} = window.EventTargetShim
+```
+
+### EventTarget
+
+> https://dom.spec.whatwg.org/#interface-eventtarget
+
+#### eventTarget.addEventListener(type, callback, options)
+
+Register an event listener.
+
+- `type` is a string. This is the event name to register.
+- `callback` is a function. This is the event listener to register.
+- `options` is a boolean or an object `{ capture?: boolean, passive?: boolean, once?: boolean }`. If this is a boolean, it's same meaning as `{ capture: options }`.
+    - `capture` is the flag to register the event listener for capture phase.
+    - `passive` is the flag to ignore `event.preventDefault()` method in the event listener.
+    - `once` is the flag to remove the event listener automatically after the first call.
+
+#### eventTarget.removeEventListener(type, callback, options)
+
+Unregister an event listener.
+
+- `type` is a string. This is the event name to unregister.
+- `callback` is a function. This is the event listener to unregister.
+- `options` is a boolean or an object `{ capture?: boolean }`. If this is a boolean, it's same meaning as `{ capture: options }`.
+    - `capture` is the flag to register the event listener for capture phase.
+
+#### eventTarget.dispatchEvent(event)
+
+Dispatch an event.
+
+- `event` is a [Event](https://dom.spec.whatwg.org/#event) object or an object `{ type: string, [key: string]: any }`. The latter is non-standard but useful. In both cases, listeners receive the event as implementing [Event](https://dom.spec.whatwg.org/#event) interface.
+
+### defineEventAttribute(proto, type)
+
+Define an event attribute (e.g. `onclick`) to `proto`. This is non-standard.
+
+- `proto` is an object (assuming it's a prototype object). This function defines a getter/setter pair for the event attribute.
+- `type` is a string. This is the event name to define.
+
+For example:
+
+```js
+class AbortSignal extends EventTarget {
+    constructor() {
+        this.aborted = false
+    }
+}
+// Define `onabort` property.
+defineEventAttribute(AbortSignal.prototype, "abort")
+```
+
+### EventTarget(types)
+
+Define a custom `EventTarget` class with event attributes. This is non-standard.
+
+- `types` is a string or an array of strings. This is the event name to define.
+
+For example:
+
+```js
+// This has `onabort` property.
+class AbortSignal extends EventTarget("abort") {
+    constructor() {
+        this.aborted = false
+    }
+}
+```
+
+## 📚 Examples
+
+### ES2015 and later
+
+> https://jsfiddle.net/636vea92/
+
+```js
+const {EventTarget, defineEventAttribute} = EventTargetShim
+
+// Define a derived class.
+class Foo extends EventTarget {
+    // ...
+}
+
+// Define `foo.onhello` property.
+defineEventAttribute(Foo.prototype, "hello")
+
+// Register event listeners.
+const foo = new Foo()
+foo.addEventListener("hello", (e) => {
+    console.log("hello", e)
+})
+foo.onhello = (e) => {
+    console.log("onhello", e)
+}
+
+// Dispatching events
+foo.dispatchEvent(new CustomEvent("hello", { detail: "detail" }))
+```
+
+### Typescript
+
+```ts
+import { EventTarget, defineEventAttribute } from "event-target-shim";
+
+// Define events
+type FooEvents = {
+    hello: CustomEvent
+}
+type FooEventAttributes = {
+    onhello: CustomEvent
+}
+
+// Define a derived class.
+class Foo extends EventTarget<FooEvents, FooEventAttributes> {
+    // ...
+}
+// Define `foo.onhello` property's implementation.
+defineEventAttribute(Foo.prototype, "hello")
+
+// Register event listeners.
+const foo = new Foo()
+foo.addEventListener("hello", (e) => {
+    console.log("hello", e.detail)
+})
+foo.onhello = (e) => {
+    console.log("onhello", e.detail)
+}
+
+// Dispatching events
+foo.dispatchEvent(new CustomEvent("hello", { detail: "detail" }))
+```
+
+Unfortunately, both `FooEvents` and `FooEventAttributes` are needed because TypeScript doesn't allow the mutation of string literal types. If TypeScript allowed us to compute `"onhello"` from `"hello"` in types, `FooEventAttributes` will be optional.
+
+This `EventTarget` type is compatible with `EventTarget` interface of `lib.dom.d.ts`.
+
+#### To disallow unknown events
+
+By default, methods such as `addEventListener` accept unknown events. You can disallow unknown events by the third type parameter `"strict"`.
+
+```ts
+type FooEvents = {
+    hello: CustomEvent
+}
+class Foo extends EventTarget<FooEvents, {}, "strict"> {
+    // ...
+}
+
+// OK because `hello` is defined in FooEvents.
+foo.addEventListener("hello", (e) => {
+})
+// Error because `unknown` is not defined in FooEvents.
+foo.addEventListener("unknown", (e) => {
+})
+```
+
+However, if you use `"strict"` parameter, it loses compatibility with `EventTarget` interface of `lib.dom.d.ts`.
+
+#### To infer the type of `dispatchEvent()` method
+
+TypeScript cannot infer the event type of `dispatchEvent()` method properly from the argument in most cases. You can improve this behavior with the following steps:
+
+1. Use the third type parameter `"strict"`. This prevents inferring to `dispatchEvent<string>()`.
+2. Make the `type` property of event definitions stricter.
+
+```ts
+type FooEvents = {
+    hello: CustomEvent & { type: "hello" }
+    hey: Event & { type: "hey" }
+}
+class Foo extends EventTarget<FooEvents, {}, "strict"> {
+    // ...
+}
+
+// Error because `detail` property is lacking.
+foo.dispatchEvent({ type: "hello" })
+```
+
+### ES5
+
+> https://jsfiddle.net/522zc9de/
+
+```js
+// Define a derived class.
+function Foo() {
+    EventTarget.call(this)
+}
+Foo.prototype = Object.create(EventTarget.prototype, {
+    constructor: { value: Foo, configurable: true, writable: true }
+    // ...
+})
+
+// Define `foo.onhello` property.
+defineEventAttribute(Foo.prototype, "hello")
+
+// Register event listeners.
+var foo = new Foo()
+foo.addEventListener("hello", function(e) {
+    console.log("hello", e)
+})
+foo.onhello = function(e) {
+    console.log("onhello", e)
+}
+
+// Dispatching events
+function isSupportEventConstrucor() { // IE does not support.
+    try {
+        new CusomEvent("hello")
+        return true
+    } catch (_err) {
+        return false
+    }
+}
+if (isSupportEventConstrucor()) {
+    foo.dispatchEvent(new CustomEvent("hello", { detail: "detail" }))
+} else {
+    var e = document.createEvent("CustomEvent")
+    e.initCustomEvent("hello", false, false, "detail")
+    foo.dispatchEvent(e)
+}
+```
+
+## 📰 Changelog
+
+- See [GitHub releases](https://github.com/mysticatea/event-target-shim/releases).
+
+## 🍻 Contributing
+
+Contributing is welcome ❤️
+
+Please use GitHub issues/PRs.
+
+### Development tools
+
+- `npm install` installs dependencies for development.
+- `npm test` runs tests and measures code coverage.
+- `npm run clean` removes temporary files of tests.
+- `npm run coverage` opens code coverage of the previous test with your default browser.
+- `npm run lint` runs ESLint.
+- `npm run build` generates `dist` codes.
+- `npm run watch` runs tests on each file change.
diff --git a/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.js b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.js
new file mode 100644
index 0000000..53ce220
--- /dev/null
+++ b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.js
@@ -0,0 +1,871 @@
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * @copyright 2015 Toru Nagashima. All rights reserved.
+ * See LICENSE file in root directory for full license.
+ */
+'use strict';
+
+Object.defineProperty(exports, '__esModule', { value: true });
+
+/**
+ * @typedef {object} PrivateData
+ * @property {EventTarget} eventTarget The event target.
+ * @property {{type:string}} event The original event object.
+ * @property {number} eventPhase The current event phase.
+ * @property {EventTarget|null} currentTarget The current event target.
+ * @property {boolean} canceled The flag to prevent default.
+ * @property {boolean} stopped The flag to stop propagation.
+ * @property {boolean} immediateStopped The flag to stop propagation immediately.
+ * @property {Function|null} passiveListener The listener if the current listener is passive. Otherwise this is null.
+ * @property {number} timeStamp The unix time.
+ * @private
+ */
+
+/**
+ * Private data for event wrappers.
+ * @type {WeakMap<Event, PrivateData>}
+ * @private
+ */
+const privateData = new WeakMap();
+
+/**
+ * Cache for wrapper classes.
+ * @type {WeakMap<Object, Function>}
+ * @private
+ */
+const wrappers = new WeakMap();
+
+/**
+ * Get private data.
+ * @param {Event} event The event object to get private data.
+ * @returns {PrivateData} The private data of the event.
+ * @private
+ */
+function pd(event) {
+    const retv = privateData.get(event);
+    console.assert(
+        retv != null,
+        "'this' is expected an Event object, but got",
+        event
+    );
+    return retv
+}
+
+/**
+ * https://dom.spec.whatwg.org/#set-the-canceled-flag
+ * @param data {PrivateData} private data.
+ */
+function setCancelFlag(data) {
+    if (data.passiveListener != null) {
+        if (
+            typeof console !== "undefined" &&
+            typeof console.error === "function"
+        ) {
+            console.error(
+                "Unable to preventDefault inside passive event listener invocation.",
+                data.passiveListener
+            );
+        }
+        return
+    }
+    if (!data.event.cancelable) {
+        return
+    }
+
+    data.canceled = true;
+    if (typeof data.event.preventDefault === "function") {
+        data.event.preventDefault();
+    }
+}
+
+/**
+ * @see https://dom.spec.whatwg.org/#interface-event
+ * @private
+ */
+/**
+ * The event wrapper.
+ * @constructor
+ * @param {EventTarget} eventTarget The event target of this dispatching.
+ * @param {Event|{type:string}} event The original event to wrap.
+ */
+function Event(eventTarget, event) {
+    privateData.set(this, {
+        eventTarget,
+        event,
+        eventPhase: 2,
+        currentTarget: eventTarget,
+        canceled: false,
+        stopped: false,
+        immediateStopped: false,
+        passiveListener: null,
+        timeStamp: event.timeStamp || Date.now(),
+    });
+
+    // https://heycam.github.io/webidl/#Unforgeable
+    Object.defineProperty(this, "isTrusted", { value: false, enumerable: true });
+
+    // Define accessors
+    const keys = Object.keys(event);
+    for (let i = 0; i < keys.length; ++i) {
+        const key = keys[i];
+        if (!(key in this)) {
+            Object.defineProperty(this, key, defineRedirectDescriptor(key));
+        }
+    }
+}
+
+// Should be enumerable, but class methods are not enumerable.
+Event.prototype = {
+    /**
+     * The type of this event.
+     * @type {string}
+     */
+    get type() {
+        return pd(this).event.type
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     */
+    get target() {
+        return pd(this).eventTarget
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     */
+    get currentTarget() {
+        return pd(this).currentTarget
+    },
+
+    /**
+     * @returns {EventTarget[]} The composed path of this event.
+     */
+    composedPath() {
+        const currentTarget = pd(this).currentTarget;
+        if (currentTarget == null) {
+            return []
+        }
+        return [currentTarget]
+    },
+
+    /**
+     * Constant of NONE.
+     * @type {number}
+     */
+    get NONE() {
+        return 0
+    },
+
+    /**
+     * Constant of CAPTURING_PHASE.
+     * @type {number}
+     */
+    get CAPTURING_PHASE() {
+        return 1
+    },
+
+    /**
+     * Constant of AT_TARGET.
+     * @type {number}
+     */
+    get AT_TARGET() {
+        return 2
+    },
+
+    /**
+     * Constant of BUBBLING_PHASE.
+     * @type {number}
+     */
+    get BUBBLING_PHASE() {
+        return 3
+    },
+
+    /**
+     * The target of this event.
+     * @type {number}
+     */
+    get eventPhase() {
+        return pd(this).eventPhase
+    },
+
+    /**
+     * Stop event bubbling.
+     * @returns {void}
+     */
+    stopPropagation() {
+        const data = pd(this);
+
+        data.stopped = true;
+        if (typeof data.event.stopPropagation === "function") {
+            data.event.stopPropagation();
+        }
+    },
+
+    /**
+     * Stop event bubbling.
+     * @returns {void}
+     */
+    stopImmediatePropagation() {
+        const data = pd(this);
+
+        data.stopped = true;
+        data.immediateStopped = true;
+        if (typeof data.event.stopImmediatePropagation === "function") {
+            data.event.stopImmediatePropagation();
+        }
+    },
+
+    /**
+     * The flag to be bubbling.
+     * @type {boolean}
+     */
+    get bubbles() {
+        return Boolean(pd(this).event.bubbles)
+    },
+
+    /**
+     * The flag to be cancelable.
+     * @type {boolean}
+     */
+    get cancelable() {
+        return Boolean(pd(this).event.cancelable)
+    },
+
+    /**
+     * Cancel this event.
+     * @returns {void}
+     */
+    preventDefault() {
+        setCancelFlag(pd(this));
+    },
+
+    /**
+     * The flag to indicate cancellation state.
+     * @type {boolean}
+     */
+    get defaultPrevented() {
+        return pd(this).canceled
+    },
+
+    /**
+     * The flag to be composed.
+     * @type {boolean}
+     */
+    get composed() {
+        return Boolean(pd(this).event.composed)
+    },
+
+    /**
+     * The unix time of this event.
+     * @type {number}
+     */
+    get timeStamp() {
+        return pd(this).timeStamp
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     * @deprecated
+     */
+    get srcElement() {
+        return pd(this).eventTarget
+    },
+
+    /**
+     * The flag to stop event bubbling.
+     * @type {boolean}
+     * @deprecated
+     */
+    get cancelBubble() {
+        return pd(this).stopped
+    },
+    set cancelBubble(value) {
+        if (!value) {
+            return
+        }
+        const data = pd(this);
+
+        data.stopped = true;
+        if (typeof data.event.cancelBubble === "boolean") {
+            data.event.cancelBubble = true;
+        }
+    },
+
+    /**
+     * The flag to indicate cancellation state.
+     * @type {boolean}
+     * @deprecated
+     */
+    get returnValue() {
+        return !pd(this).canceled
+    },
+    set returnValue(value) {
+        if (!value) {
+            setCancelFlag(pd(this));
+        }
+    },
+
+    /**
+     * Initialize this event object. But do nothing under event dispatching.
+     * @param {string} type The event type.
+     * @param {boolean} [bubbles=false] The flag to be possible to bubble up.
+     * @param {boolean} [cancelable=false] The flag to be possible to cancel.
+     * @deprecated
+     */
+    initEvent() {
+        // Do nothing.
+    },
+};
+
+// `constructor` is not enumerable.
+Object.defineProperty(Event.prototype, "constructor", {
+    value: Event,
+    configurable: true,
+    writable: true,
+});
+
+// Ensure `event instanceof window.Event` is `true`.
+if (typeof window !== "undefined" && typeof window.Event !== "undefined") {
+    Object.setPrototypeOf(Event.prototype, window.Event.prototype);
+
+    // Make association for wrappers.
+    wrappers.set(window.Event.prototype, Event);
+}
+
+/**
+ * Get the property descriptor to redirect a given property.
+ * @param {string} key Property name to define property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor to redirect the property.
+ * @private
+ */
+function defineRedirectDescriptor(key) {
+    return {
+        get() {
+            return pd(this).event[key]
+        },
+        set(value) {
+            pd(this).event[key] = value;
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Get the property descriptor to call a given method property.
+ * @param {string} key Property name to define property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor to call the method property.
+ * @private
+ */
+function defineCallDescriptor(key) {
+    return {
+        value() {
+            const event = pd(this).event;
+            return event[key].apply(event, arguments)
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Define new wrapper class.
+ * @param {Function} BaseEvent The base wrapper class.
+ * @param {Object} proto The prototype of the original event.
+ * @returns {Function} The defined wrapper class.
+ * @private
+ */
+function defineWrapper(BaseEvent, proto) {
+    const keys = Object.keys(proto);
+    if (keys.length === 0) {
+        return BaseEvent
+    }
+
+    /** CustomEvent */
+    function CustomEvent(eventTarget, event) {
+        BaseEvent.call(this, eventTarget, event);
+    }
+
+    CustomEvent.prototype = Object.create(BaseEvent.prototype, {
+        constructor: { value: CustomEvent, configurable: true, writable: true },
+    });
+
+    // Define accessors.
+    for (let i = 0; i < keys.length; ++i) {
+        const key = keys[i];
+        if (!(key in BaseEvent.prototype)) {
+            const descriptor = Object.getOwnPropertyDescriptor(proto, key);
+            const isFunc = typeof descriptor.value === "function";
+            Object.defineProperty(
+                CustomEvent.prototype,
+                key,
+                isFunc
+                    ? defineCallDescriptor(key)
+                    : defineRedirectDescriptor(key)
+            );
+        }
+    }
+
+    return CustomEvent
+}
+
+/**
+ * Get the wrapper class of a given prototype.
+ * @param {Object} proto The prototype of the original event to get its wrapper.
+ * @returns {Function} The wrapper class.
+ * @private
+ */
+function getWrapper(proto) {
+    if (proto == null || proto === Object.prototype) {
+        return Event
+    }
+
+    let wrapper = wrappers.get(proto);
+    if (wrapper == null) {
+        wrapper = defineWrapper(getWrapper(Object.getPrototypeOf(proto)), proto);
+        wrappers.set(proto, wrapper);
+    }
+    return wrapper
+}
+
+/**
+ * Wrap a given event to management a dispatching.
+ * @param {EventTarget} eventTarget The event target of this dispatching.
+ * @param {Object} event The event to wrap.
+ * @returns {Event} The wrapper instance.
+ * @private
+ */
+function wrapEvent(eventTarget, event) {
+    const Wrapper = getWrapper(Object.getPrototypeOf(event));
+    return new Wrapper(eventTarget, event)
+}
+
+/**
+ * Get the immediateStopped flag of a given event.
+ * @param {Event} event The event to get.
+ * @returns {boolean} The flag to stop propagation immediately.
+ * @private
+ */
+function isStopped(event) {
+    return pd(event).immediateStopped
+}
+
+/**
+ * Set the current event phase of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {number} eventPhase New event phase.
+ * @returns {void}
+ * @private
+ */
+function setEventPhase(event, eventPhase) {
+    pd(event).eventPhase = eventPhase;
+}
+
+/**
+ * Set the current target of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {EventTarget|null} currentTarget New current target.
+ * @returns {void}
+ * @private
+ */
+function setCurrentTarget(event, currentTarget) {
+    pd(event).currentTarget = currentTarget;
+}
+
+/**
+ * Set a passive listener of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {Function|null} passiveListener New passive listener.
+ * @returns {void}
+ * @private
+ */
+function setPassiveListener(event, passiveListener) {
+    pd(event).passiveListener = passiveListener;
+}
+
+/**
+ * @typedef {object} ListenerNode
+ * @property {Function} listener
+ * @property {1|2|3} listenerType
+ * @property {boolean} passive
+ * @property {boolean} once
+ * @property {ListenerNode|null} next
+ * @private
+ */
+
+/**
+ * @type {WeakMap<object, Map<string, ListenerNode>>}
+ * @private
+ */
+const listenersMap = new WeakMap();
+
+// Listener types
+const CAPTURE = 1;
+const BUBBLE = 2;
+const ATTRIBUTE = 3;
+
+/**
+ * Check whether a given value is an object or not.
+ * @param {any} x The value to check.
+ * @returns {boolean} `true` if the value is an object.
+ */
+function isObject(x) {
+    return x !== null && typeof x === "object" //eslint-disable-line no-restricted-syntax
+}
+
+/**
+ * Get listeners.
+ * @param {EventTarget} eventTarget The event target to get.
+ * @returns {Map<string, ListenerNode>} The listeners.
+ * @private
+ */
+function getListeners(eventTarget) {
+    const listeners = listenersMap.get(eventTarget);
+    if (listeners == null) {
+        throw new TypeError(
+            "'this' is expected an EventTarget object, but got another value."
+        )
+    }
+    return listeners
+}
+
+/**
+ * Get the property descriptor for the event attribute of a given event.
+ * @param {string} eventName The event name to get property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor.
+ * @private
+ */
+function defineEventAttributeDescriptor(eventName) {
+    return {
+        get() {
+            const listeners = getListeners(this);
+            let node = listeners.get(eventName);
+            while (node != null) {
+                if (node.listenerType === ATTRIBUTE) {
+                    return node.listener
+                }
+                node = node.next;
+            }
+            return null
+        },
+
+        set(listener) {
+            if (typeof listener !== "function" && !isObject(listener)) {
+                listener = null; // eslint-disable-line no-param-reassign
+            }
+            const listeners = getListeners(this);
+
+            // Traverse to the tail while removing old value.
+            let prev = null;
+            let node = listeners.get(eventName);
+            while (node != null) {
+                if (node.listenerType === ATTRIBUTE) {
+                    // Remove old value.
+                    if (prev !== null) {
+                        prev.next = node.next;
+                    } else if (node.next !== null) {
+                        listeners.set(eventName, node.next);
+                    } else {
+                        listeners.delete(eventName);
+                    }
+                } else {
+                    prev = node;
+                }
+
+                node = node.next;
+            }
+
+            // Add new value.
+            if (listener !== null) {
+                const newNode = {
+                    listener,
+                    listenerType: ATTRIBUTE,
+                    passive: false,
+                    once: false,
+                    next: null,
+                };
+                if (prev === null) {
+                    listeners.set(eventName, newNode);
+                } else {
+                    prev.next = newNode;
+                }
+            }
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Define an event attribute (e.g. `eventTarget.onclick`).
+ * @param {Object} eventTargetPrototype The event target prototype to define an event attrbite.
+ * @param {string} eventName The event name to define.
+ * @returns {void}
+ */
+function defineEventAttribute(eventTargetPrototype, eventName) {
+    Object.defineProperty(
+        eventTargetPrototype,
+        `on${eventName}`,
+        defineEventAttributeDescriptor(eventName)
+    );
+}
+
+/**
+ * Define a custom EventTarget with event attributes.
+ * @param {string[]} eventNames Event names for event attributes.
+ * @returns {EventTarget} The custom EventTarget.
+ * @private
+ */
+function defineCustomEventTarget(eventNames) {
+    /** CustomEventTarget */
+    function CustomEventTarget() {
+        EventTarget.call(this);
+    }
+
+    CustomEventTarget.prototype = Object.create(EventTarget.prototype, {
+        constructor: {
+            value: CustomEventTarget,
+            configurable: true,
+            writable: true,
+        },
+    });
+
+    for (let i = 0; i < eventNames.length; ++i) {
+        defineEventAttribute(CustomEventTarget.prototype, eventNames[i]);
+    }
+
+    return CustomEventTarget
+}
+
+/**
+ * EventTarget.
+ *
+ * - This is constructor if no arguments.
+ * - This is a function which returns a CustomEventTarget constructor if there are arguments.
+ *
+ * For example:
+ *
+ *     class A extends EventTarget {}
+ *     class B extends EventTarget("message") {}
+ *     class C extends EventTarget("message", "error") {}
+ *     class D extends EventTarget(["message", "error"]) {}
+ */
+function EventTarget() {
+    /*eslint-disable consistent-return */
+    if (this instanceof EventTarget) {
+        listenersMap.set(this, new Map());
+        return
+    }
+    if (arguments.length === 1 && Array.isArray(arguments[0])) {
+        return defineCustomEventTarget(arguments[0])
+    }
+    if (arguments.length > 0) {
+        const types = new Array(arguments.length);
+        for (let i = 0; i < arguments.length; ++i) {
+            types[i] = arguments[i];
+        }
+        return defineCustomEventTarget(types)
+    }
+    throw new TypeError("Cannot call a class as a function")
+    /*eslint-enable consistent-return */
+}
+
+// Should be enumerable, but class methods are not enumerable.
+EventTarget.prototype = {
+    /**
+     * Add a given listener to this event target.
+     * @param {string} eventName The event name to add.
+     * @param {Function} listener The listener to add.
+     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.
+     * @returns {void}
+     */
+    addEventListener(eventName, listener, options) {
+        if (listener == null) {
+            return
+        }
+        if (typeof listener !== "function" && !isObject(listener)) {
+            throw new TypeError("'listener' should be a function or an object.")
+        }
+
+        const listeners = getListeners(this);
+        const optionsIsObj = isObject(options);
+        const capture = optionsIsObj
+            ? Boolean(options.capture)
+            : Boolean(options);
+        const listenerType = capture ? CAPTURE : BUBBLE;
+        const newNode = {
+            listener,
+            listenerType,
+            passive: optionsIsObj && Boolean(options.passive),
+            once: optionsIsObj && Boolean(options.once),
+            next: null,
+        };
+
+        // Set it as the first node if the first node is null.
+        let node = listeners.get(eventName);
+        if (node === undefined) {
+            listeners.set(eventName, newNode);
+            return
+        }
+
+        // Traverse to the tail while checking duplication..
+        let prev = null;
+        while (node != null) {
+            if (
+                node.listener === listener &&
+                node.listenerType === listenerType
+            ) {
+                // Should ignore duplication.
+                return
+            }
+            prev = node;
+            node = node.next;
+        }
+
+        // Add it.
+        prev.next = newNode;
+    },
+
+    /**
+     * Remove a given listener from this event target.
+     * @param {string} eventName The event name to remove.
+     * @param {Function} listener The listener to remove.
+     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.
+     * @returns {void}
+     */
+    removeEventListener(eventName, listener, options) {
+        if (listener == null) {
+            return
+        }
+
+        const listeners = getListeners(this);
+        const capture = isObject(options)
+            ? Boolean(options.capture)
+            : Boolean(options);
+        const listenerType = capture ? CAPTURE : BUBBLE;
+
+        let prev = null;
+        let node = listeners.get(eventName);
+        while (node != null) {
+            if (
+                node.listener === listener &&
+                node.listenerType === listenerType
+            ) {
+                if (prev !== null) {
+                    prev.next = node.next;
+                } else if (node.next !== null) {
+                    listeners.set(eventName, node.next);
+                } else {
+                    listeners.delete(eventName);
+                }
+                return
+            }
+
+            prev = node;
+            node = node.next;
+        }
+    },
+
+    /**
+     * Dispatch a given event.
+     * @param {Event|{type:string}} event The event to dispatch.
+     * @returns {boolean} `false` if canceled.
+     */
+    dispatchEvent(event) {
+        if (event == null || typeof event.type !== "string") {
+            throw new TypeError('"event.type" should be a string.')
+        }
+
+        // If listeners aren't registered, terminate.
+        const listeners = getListeners(this);
+        const eventName = event.type;
+        let node = listeners.get(eventName);
+        if (node == null) {
+            return true
+        }
+
+        // Since we cannot rewrite several properties, so wrap object.
+        const wrappedEvent = wrapEvent(this, event);
+
+        // This doesn't process capturing phase and bubbling phase.
+        // This isn't participating in a tree.
+        let prev = null;
+        while (node != null) {
+            // Remove this listener if it's once
+            if (node.once) {
+                if (prev !== null) {
+                    prev.next = node.next;
+                } else if (node.next !== null) {
+                    listeners.set(eventName, node.next);
+                } else {
+                    listeners.delete(eventName);
+                }
+            } else {
+                prev = node;
+            }
+
+            // Call this listener
+            setPassiveListener(
+                wrappedEvent,
+                node.passive ? node.listener : null
+            );
+            if (typeof node.listener === "function") {
+                try {
+                    node.listener.call(this, wrappedEvent);
+                } catch (err) {
+                    if (
+                        typeof console !== "undefined" &&
+                        typeof console.error === "function"
+                    ) {
+                        console.error(err);
+                    }
+                }
+            } else if (
+                node.listenerType !== ATTRIBUTE &&
+                typeof node.listener.handleEvent === "function"
+            ) {
+                node.listener.handleEvent(wrappedEvent);
+            }
+
+            // Break if `event.stopImmediatePropagation` was called.
+            if (isStopped(wrappedEvent)) {
+                break
+            }
+
+            node = node.next;
+        }
+        setPassiveListener(wrappedEvent, null);
+        setEventPhase(wrappedEvent, 0);
+        setCurrentTarget(wrappedEvent, null);
+
+        return !wrappedEvent.defaultPrevented
+    },
+};
+
+// `constructor` is not enumerable.
+Object.defineProperty(EventTarget.prototype, "constructor", {
+    value: EventTarget,
+    configurable: true,
+    writable: true,
+});
+
+// Ensure `eventTarget instanceof window.EventTarget` is `true`.
+if (
+    typeof window !== "undefined" &&
+    typeof window.EventTarget !== "undefined"
+) {
+    Object.setPrototypeOf(EventTarget.prototype, window.EventTarget.prototype);
+}
+
+exports.defineEventAttribute = defineEventAttribute;
+exports.EventTarget = EventTarget;
+exports.default = EventTarget;
+
+module.exports = EventTarget
+module.exports.EventTarget = module.exports["default"] = EventTarget
+module.exports.defineEventAttribute = defineEventAttribute
+//# sourceMappingURL=event-target-shim.js.map
diff --git a/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.js.map b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.js.map
new file mode 100644
index 0000000..83c5f62
--- /dev/null
+++ b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"event-target-shim.js","sources":["../src/event.mjs","../src/event-target.mjs"],"sourcesContent":["/**\n * @typedef {object} PrivateData\n * @property {EventTarget} eventTarget The event target.\n * @property {{type:string}} event The original event object.\n * @property {number} eventPhase The current event phase.\n * @property {EventTarget|null} currentTarget The current event target.\n * @property {boolean} canceled The flag to prevent default.\n * @property {boolean} stopped The flag to stop propagation.\n * @property {boolean} immediateStopped The flag to stop propagation immediately.\n * @property {Function|null} passiveListener The listener if the current listener is passive. Otherwise this is null.\n * @property {number} timeStamp The unix time.\n * @private\n */\n\n/**\n * Private data for event wrappers.\n * @type {WeakMap<Event, PrivateData>}\n * @private\n */\nconst privateData = new WeakMap()\n\n/**\n * Cache for wrapper classes.\n * @type {WeakMap<Object, Function>}\n * @private\n */\nconst wrappers = new WeakMap()\n\n/**\n * Get private data.\n * @param {Event} event The event object to get private data.\n * @returns {PrivateData} The private data of the event.\n * @private\n */\nfunction pd(event) {\n    const retv = privateData.get(event)\n    console.assert(\n        retv != null,\n        \"'this' is expected an Event object, but got\",\n        event\n    )\n    return retv\n}\n\n/**\n * https://dom.spec.whatwg.org/#set-the-canceled-flag\n * @param data {PrivateData} private data.\n */\nfunction setCancelFlag(data) {\n    if (data.passiveListener != null) {\n        if (\n            typeof console !== \"undefined\" &&\n            typeof console.error === \"function\"\n        ) {\n            console.error(\n                \"Unable to preventDefault inside passive event listener invocation.\",\n                data.passiveListener\n            )\n        }\n        return\n    }\n    if (!data.event.cancelable) {\n        return\n    }\n\n    data.canceled = true\n    if (typeof data.event.preventDefault === \"function\") {\n        data.event.preventDefault()\n    }\n}\n\n/**\n * @see https://dom.spec.whatwg.org/#interface-event\n * @private\n */\n/**\n * The event wrapper.\n * @constructor\n * @param {EventTarget} eventTarget The event target of this dispatching.\n * @param {Event|{type:string}} event The original event to wrap.\n */\nfunction Event(eventTarget, event) {\n    privateData.set(this, {\n        eventTarget,\n        event,\n        eventPhase: 2,\n        currentTarget: eventTarget,\n        canceled: false,\n        stopped: false,\n        immediateStopped: false,\n        passiveListener: null,\n        timeStamp: event.timeStamp || Date.now(),\n    })\n\n    // https://heycam.github.io/webidl/#Unforgeable\n    Object.defineProperty(this, \"isTrusted\", { value: false, enumerable: true })\n\n    // Define accessors\n    const keys = Object.keys(event)\n    for (let i = 0; i < keys.length; ++i) {\n        const key = keys[i]\n        if (!(key in this)) {\n            Object.defineProperty(this, key, defineRedirectDescriptor(key))\n        }\n    }\n}\n\n// Should be enumerable, but class methods are not enumerable.\nEvent.prototype = {\n    /**\n     * The type of this event.\n     * @type {string}\n     */\n    get type() {\n        return pd(this).event.type\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     */\n    get target() {\n        return pd(this).eventTarget\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     */\n    get currentTarget() {\n        return pd(this).currentTarget\n    },\n\n    /**\n     * @returns {EventTarget[]} The composed path of this event.\n     */\n    composedPath() {\n        const currentTarget = pd(this).currentTarget\n        if (currentTarget == null) {\n            return []\n        }\n        return [currentTarget]\n    },\n\n    /**\n     * Constant of NONE.\n     * @type {number}\n     */\n    get NONE() {\n        return 0\n    },\n\n    /**\n     * Constant of CAPTURING_PHASE.\n     * @type {number}\n     */\n    get CAPTURING_PHASE() {\n        return 1\n    },\n\n    /**\n     * Constant of AT_TARGET.\n     * @type {number}\n     */\n    get AT_TARGET() {\n        return 2\n    },\n\n    /**\n     * Constant of BUBBLING_PHASE.\n     * @type {number}\n     */\n    get BUBBLING_PHASE() {\n        return 3\n    },\n\n    /**\n     * The target of this event.\n     * @type {number}\n     */\n    get eventPhase() {\n        return pd(this).eventPhase\n    },\n\n    /**\n     * Stop event bubbling.\n     * @returns {void}\n     */\n    stopPropagation() {\n        const data = pd(this)\n\n        data.stopped = true\n        if (typeof data.event.stopPropagation === \"function\") {\n            data.event.stopPropagation()\n        }\n    },\n\n    /**\n     * Stop event bubbling.\n     * @returns {void}\n     */\n    stopImmediatePropagation() {\n        const data = pd(this)\n\n        data.stopped = true\n        data.immediateStopped = true\n        if (typeof data.event.stopImmediatePropagation === \"function\") {\n            data.event.stopImmediatePropagation()\n        }\n    },\n\n    /**\n     * The flag to be bubbling.\n     * @type {boolean}\n     */\n    get bubbles() {\n        return Boolean(pd(this).event.bubbles)\n    },\n\n    /**\n     * The flag to be cancelable.\n     * @type {boolean}\n     */\n    get cancelable() {\n        return Boolean(pd(this).event.cancelable)\n    },\n\n    /**\n     * Cancel this event.\n     * @returns {void}\n     */\n    preventDefault() {\n        setCancelFlag(pd(this))\n    },\n\n    /**\n     * The flag to indicate cancellation state.\n     * @type {boolean}\n     */\n    get defaultPrevented() {\n        return pd(this).canceled\n    },\n\n    /**\n     * The flag to be composed.\n     * @type {boolean}\n     */\n    get composed() {\n        return Boolean(pd(this).event.composed)\n    },\n\n    /**\n     * The unix time of this event.\n     * @type {number}\n     */\n    get timeStamp() {\n        return pd(this).timeStamp\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     * @deprecated\n     */\n    get srcElement() {\n        return pd(this).eventTarget\n    },\n\n    /**\n     * The flag to stop event bubbling.\n     * @type {boolean}\n     * @deprecated\n     */\n    get cancelBubble() {\n        return pd(this).stopped\n    },\n    set cancelBubble(value) {\n        if (!value) {\n            return\n        }\n        const data = pd(this)\n\n        data.stopped = true\n        if (typeof data.event.cancelBubble === \"boolean\") {\n            data.event.cancelBubble = true\n        }\n    },\n\n    /**\n     * The flag to indicate cancellation state.\n     * @type {boolean}\n     * @deprecated\n     */\n    get returnValue() {\n        return !pd(this).canceled\n    },\n    set returnValue(value) {\n        if (!value) {\n            setCancelFlag(pd(this))\n        }\n    },\n\n    /**\n     * Initialize this event object. But do nothing under event dispatching.\n     * @param {string} type The event type.\n     * @param {boolean} [bubbles=false] The flag to be possible to bubble up.\n     * @param {boolean} [cancelable=false] The flag to be possible to cancel.\n     * @deprecated\n     */\n    initEvent() {\n        // Do nothing.\n    },\n}\n\n// `constructor` is not enumerable.\nObject.defineProperty(Event.prototype, \"constructor\", {\n    value: Event,\n    configurable: true,\n    writable: true,\n})\n\n// Ensure `event instanceof window.Event` is `true`.\nif (typeof window !== \"undefined\" && typeof window.Event !== \"undefined\") {\n    Object.setPrototypeOf(Event.prototype, window.Event.prototype)\n\n    // Make association for wrappers.\n    wrappers.set(window.Event.prototype, Event)\n}\n\n/**\n * Get the property descriptor to redirect a given property.\n * @param {string} key Property name to define property descriptor.\n * @returns {PropertyDescriptor} The property descriptor to redirect the property.\n * @private\n */\nfunction defineRedirectDescriptor(key) {\n    return {\n        get() {\n            return pd(this).event[key]\n        },\n        set(value) {\n            pd(this).event[key] = value\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Get the property descriptor to call a given method property.\n * @param {string} key Property name to define property descriptor.\n * @returns {PropertyDescriptor} The property descriptor to call the method property.\n * @private\n */\nfunction defineCallDescriptor(key) {\n    return {\n        value() {\n            const event = pd(this).event\n            return event[key].apply(event, arguments)\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Define new wrapper class.\n * @param {Function} BaseEvent The base wrapper class.\n * @param {Object} proto The prototype of the original event.\n * @returns {Function} The defined wrapper class.\n * @private\n */\nfunction defineWrapper(BaseEvent, proto) {\n    const keys = Object.keys(proto)\n    if (keys.length === 0) {\n        return BaseEvent\n    }\n\n    /** CustomEvent */\n    function CustomEvent(eventTarget, event) {\n        BaseEvent.call(this, eventTarget, event)\n    }\n\n    CustomEvent.prototype = Object.create(BaseEvent.prototype, {\n        constructor: { value: CustomEvent, configurable: true, writable: true },\n    })\n\n    // Define accessors.\n    for (let i = 0; i < keys.length; ++i) {\n        const key = keys[i]\n        if (!(key in BaseEvent.prototype)) {\n            const descriptor = Object.getOwnPropertyDescriptor(proto, key)\n            const isFunc = typeof descriptor.value === \"function\"\n            Object.defineProperty(\n                CustomEvent.prototype,\n                key,\n                isFunc\n                    ? defineCallDescriptor(key)\n                    : defineRedirectDescriptor(key)\n            )\n        }\n    }\n\n    return CustomEvent\n}\n\n/**\n * Get the wrapper class of a given prototype.\n * @param {Object} proto The prototype of the original event to get its wrapper.\n * @returns {Function} The wrapper class.\n * @private\n */\nfunction getWrapper(proto) {\n    if (proto == null || proto === Object.prototype) {\n        return Event\n    }\n\n    let wrapper = wrappers.get(proto)\n    if (wrapper == null) {\n        wrapper = defineWrapper(getWrapper(Object.getPrototypeOf(proto)), proto)\n        wrappers.set(proto, wrapper)\n    }\n    return wrapper\n}\n\n/**\n * Wrap a given event to management a dispatching.\n * @param {EventTarget} eventTarget The event target of this dispatching.\n * @param {Object} event The event to wrap.\n * @returns {Event} The wrapper instance.\n * @private\n */\nexport function wrapEvent(eventTarget, event) {\n    const Wrapper = getWrapper(Object.getPrototypeOf(event))\n    return new Wrapper(eventTarget, event)\n}\n\n/**\n * Get the immediateStopped flag of a given event.\n * @param {Event} event The event to get.\n * @returns {boolean} The flag to stop propagation immediately.\n * @private\n */\nexport function isStopped(event) {\n    return pd(event).immediateStopped\n}\n\n/**\n * Set the current event phase of a given event.\n * @param {Event} event The event to set current target.\n * @param {number} eventPhase New event phase.\n * @returns {void}\n * @private\n */\nexport function setEventPhase(event, eventPhase) {\n    pd(event).eventPhase = eventPhase\n}\n\n/**\n * Set the current target of a given event.\n * @param {Event} event The event to set current target.\n * @param {EventTarget|null} currentTarget New current target.\n * @returns {void}\n * @private\n */\nexport function setCurrentTarget(event, currentTarget) {\n    pd(event).currentTarget = currentTarget\n}\n\n/**\n * Set a passive listener of a given event.\n * @param {Event} event The event to set current target.\n * @param {Function|null} passiveListener New passive listener.\n * @returns {void}\n * @private\n */\nexport function setPassiveListener(event, passiveListener) {\n    pd(event).passiveListener = passiveListener\n}\n","import {\n    isStopped,\n    setCurrentTarget,\n    setEventPhase,\n    setPassiveListener,\n    wrapEvent,\n} from \"./event.mjs\"\n\n/**\n * @typedef {object} ListenerNode\n * @property {Function} listener\n * @property {1|2|3} listenerType\n * @property {boolean} passive\n * @property {boolean} once\n * @property {ListenerNode|null} next\n * @private\n */\n\n/**\n * @type {WeakMap<object, Map<string, ListenerNode>>}\n * @private\n */\nconst listenersMap = new WeakMap()\n\n// Listener types\nconst CAPTURE = 1\nconst BUBBLE = 2\nconst ATTRIBUTE = 3\n\n/**\n * Check whether a given value is an object or not.\n * @param {any} x The value to check.\n * @returns {boolean} `true` if the value is an object.\n */\nfunction isObject(x) {\n    return x !== null && typeof x === \"object\" //eslint-disable-line no-restricted-syntax\n}\n\n/**\n * Get listeners.\n * @param {EventTarget} eventTarget The event target to get.\n * @returns {Map<string, ListenerNode>} The listeners.\n * @private\n */\nfunction getListeners(eventTarget) {\n    const listeners = listenersMap.get(eventTarget)\n    if (listeners == null) {\n        throw new TypeError(\n            \"'this' is expected an EventTarget object, but got another value.\"\n        )\n    }\n    return listeners\n}\n\n/**\n * Get the property descriptor for the event attribute of a given event.\n * @param {string} eventName The event name to get property descriptor.\n * @returns {PropertyDescriptor} The property descriptor.\n * @private\n */\nfunction defineEventAttributeDescriptor(eventName) {\n    return {\n        get() {\n            const listeners = getListeners(this)\n            let node = listeners.get(eventName)\n            while (node != null) {\n                if (node.listenerType === ATTRIBUTE) {\n                    return node.listener\n                }\n                node = node.next\n            }\n            return null\n        },\n\n        set(listener) {\n            if (typeof listener !== \"function\" && !isObject(listener)) {\n                listener = null // eslint-disable-line no-param-reassign\n            }\n            const listeners = getListeners(this)\n\n            // Traverse to the tail while removing old value.\n            let prev = null\n            let node = listeners.get(eventName)\n            while (node != null) {\n                if (node.listenerType === ATTRIBUTE) {\n                    // Remove old value.\n                    if (prev !== null) {\n                        prev.next = node.next\n                    } else if (node.next !== null) {\n                        listeners.set(eventName, node.next)\n                    } else {\n                        listeners.delete(eventName)\n                    }\n                } else {\n                    prev = node\n                }\n\n                node = node.next\n            }\n\n            // Add new value.\n            if (listener !== null) {\n                const newNode = {\n                    listener,\n                    listenerType: ATTRIBUTE,\n                    passive: false,\n                    once: false,\n                    next: null,\n                }\n                if (prev === null) {\n                    listeners.set(eventName, newNode)\n                } else {\n                    prev.next = newNode\n                }\n            }\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Define an event attribute (e.g. `eventTarget.onclick`).\n * @param {Object} eventTargetPrototype The event target prototype to define an event attrbite.\n * @param {string} eventName The event name to define.\n * @returns {void}\n */\nfunction defineEventAttribute(eventTargetPrototype, eventName) {\n    Object.defineProperty(\n        eventTargetPrototype,\n        `on${eventName}`,\n        defineEventAttributeDescriptor(eventName)\n    )\n}\n\n/**\n * Define a custom EventTarget with event attributes.\n * @param {string[]} eventNames Event names for event attributes.\n * @returns {EventTarget} The custom EventTarget.\n * @private\n */\nfunction defineCustomEventTarget(eventNames) {\n    /** CustomEventTarget */\n    function CustomEventTarget() {\n        EventTarget.call(this)\n    }\n\n    CustomEventTarget.prototype = Object.create(EventTarget.prototype, {\n        constructor: {\n            value: CustomEventTarget,\n            configurable: true,\n            writable: true,\n        },\n    })\n\n    for (let i = 0; i < eventNames.length; ++i) {\n        defineEventAttribute(CustomEventTarget.prototype, eventNames[i])\n    }\n\n    return CustomEventTarget\n}\n\n/**\n * EventTarget.\n *\n * - This is constructor if no arguments.\n * - This is a function which returns a CustomEventTarget constructor if there are arguments.\n *\n * For example:\n *\n *     class A extends EventTarget {}\n *     class B extends EventTarget(\"message\") {}\n *     class C extends EventTarget(\"message\", \"error\") {}\n *     class D extends EventTarget([\"message\", \"error\"]) {}\n */\nfunction EventTarget() {\n    /*eslint-disable consistent-return */\n    if (this instanceof EventTarget) {\n        listenersMap.set(this, new Map())\n        return\n    }\n    if (arguments.length === 1 && Array.isArray(arguments[0])) {\n        return defineCustomEventTarget(arguments[0])\n    }\n    if (arguments.length > 0) {\n        const types = new Array(arguments.length)\n        for (let i = 0; i < arguments.length; ++i) {\n            types[i] = arguments[i]\n        }\n        return defineCustomEventTarget(types)\n    }\n    throw new TypeError(\"Cannot call a class as a function\")\n    /*eslint-enable consistent-return */\n}\n\n// Should be enumerable, but class methods are not enumerable.\nEventTarget.prototype = {\n    /**\n     * Add a given listener to this event target.\n     * @param {string} eventName The event name to add.\n     * @param {Function} listener The listener to add.\n     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.\n     * @returns {void}\n     */\n    addEventListener(eventName, listener, options) {\n        if (listener == null) {\n            return\n        }\n        if (typeof listener !== \"function\" && !isObject(listener)) {\n            throw new TypeError(\"'listener' should be a function or an object.\")\n        }\n\n        const listeners = getListeners(this)\n        const optionsIsObj = isObject(options)\n        const capture = optionsIsObj\n            ? Boolean(options.capture)\n            : Boolean(options)\n        const listenerType = capture ? CAPTURE : BUBBLE\n        const newNode = {\n            listener,\n            listenerType,\n            passive: optionsIsObj && Boolean(options.passive),\n            once: optionsIsObj && Boolean(options.once),\n            next: null,\n        }\n\n        // Set it as the first node if the first node is null.\n        let node = listeners.get(eventName)\n        if (node === undefined) {\n            listeners.set(eventName, newNode)\n            return\n        }\n\n        // Traverse to the tail while checking duplication..\n        let prev = null\n        while (node != null) {\n            if (\n                node.listener === listener &&\n                node.listenerType === listenerType\n            ) {\n                // Should ignore duplication.\n                return\n            }\n            prev = node\n            node = node.next\n        }\n\n        // Add it.\n        prev.next = newNode\n    },\n\n    /**\n     * Remove a given listener from this event target.\n     * @param {string} eventName The event name to remove.\n     * @param {Function} listener The listener to remove.\n     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.\n     * @returns {void}\n     */\n    removeEventListener(eventName, listener, options) {\n        if (listener == null) {\n            return\n        }\n\n        const listeners = getListeners(this)\n        const capture = isObject(options)\n            ? Boolean(options.capture)\n            : Boolean(options)\n        const listenerType = capture ? CAPTURE : BUBBLE\n\n        let prev = null\n        let node = listeners.get(eventName)\n        while (node != null) {\n            if (\n                node.listener === listener &&\n                node.listenerType === listenerType\n            ) {\n                if (prev !== null) {\n                    prev.next = node.next\n                } else if (node.next !== null) {\n                    listeners.set(eventName, node.next)\n                } else {\n                    listeners.delete(eventName)\n                }\n                return\n            }\n\n            prev = node\n            node = node.next\n        }\n    },\n\n    /**\n     * Dispatch a given event.\n     * @param {Event|{type:string}} event The event to dispatch.\n     * @returns {boolean} `false` if canceled.\n     */\n    dispatchEvent(event) {\n        if (event == null || typeof event.type !== \"string\") {\n            throw new TypeError('\"event.type\" should be a string.')\n        }\n\n        // If listeners aren't registered, terminate.\n        const listeners = getListeners(this)\n        const eventName = event.type\n        let node = listeners.get(eventName)\n        if (node == null) {\n            return true\n        }\n\n        // Since we cannot rewrite several properties, so wrap object.\n        const wrappedEvent = wrapEvent(this, event)\n\n        // This doesn't process capturing phase and bubbling phase.\n        // This isn't participating in a tree.\n        let prev = null\n        while (node != null) {\n            // Remove this listener if it's once\n            if (node.once) {\n                if (prev !== null) {\n                    prev.next = node.next\n                } else if (node.next !== null) {\n                    listeners.set(eventName, node.next)\n                } else {\n                    listeners.delete(eventName)\n                }\n            } else {\n                prev = node\n            }\n\n            // Call this listener\n            setPassiveListener(\n                wrappedEvent,\n                node.passive ? node.listener : null\n            )\n            if (typeof node.listener === \"function\") {\n                try {\n                    node.listener.call(this, wrappedEvent)\n                } catch (err) {\n                    if (\n                        typeof console !== \"undefined\" &&\n                        typeof console.error === \"function\"\n                    ) {\n                        console.error(err)\n                    }\n                }\n            } else if (\n                node.listenerType !== ATTRIBUTE &&\n                typeof node.listener.handleEvent === \"function\"\n            ) {\n                node.listener.handleEvent(wrappedEvent)\n            }\n\n            // Break if `event.stopImmediatePropagation` was called.\n            if (isStopped(wrappedEvent)) {\n                break\n            }\n\n            node = 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\ No newline at end of file
diff --git a/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.mjs b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.mjs
new file mode 100644
index 0000000..114f3a1
--- /dev/null
+++ b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.mjs
@@ -0,0 +1,862 @@
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * @copyright 2015 Toru Nagashima. All rights reserved.
+ * See LICENSE file in root directory for full license.
+ */
+/**
+ * @typedef {object} PrivateData
+ * @property {EventTarget} eventTarget The event target.
+ * @property {{type:string}} event The original event object.
+ * @property {number} eventPhase The current event phase.
+ * @property {EventTarget|null} currentTarget The current event target.
+ * @property {boolean} canceled The flag to prevent default.
+ * @property {boolean} stopped The flag to stop propagation.
+ * @property {boolean} immediateStopped The flag to stop propagation immediately.
+ * @property {Function|null} passiveListener The listener if the current listener is passive. Otherwise this is null.
+ * @property {number} timeStamp The unix time.
+ * @private
+ */
+
+/**
+ * Private data for event wrappers.
+ * @type {WeakMap<Event, PrivateData>}
+ * @private
+ */
+const privateData = new WeakMap();
+
+/**
+ * Cache for wrapper classes.
+ * @type {WeakMap<Object, Function>}
+ * @private
+ */
+const wrappers = new WeakMap();
+
+/**
+ * Get private data.
+ * @param {Event} event The event object to get private data.
+ * @returns {PrivateData} The private data of the event.
+ * @private
+ */
+function pd(event) {
+    const retv = privateData.get(event);
+    console.assert(
+        retv != null,
+        "'this' is expected an Event object, but got",
+        event
+    );
+    return retv
+}
+
+/**
+ * https://dom.spec.whatwg.org/#set-the-canceled-flag
+ * @param data {PrivateData} private data.
+ */
+function setCancelFlag(data) {
+    if (data.passiveListener != null) {
+        if (
+            typeof console !== "undefined" &&
+            typeof console.error === "function"
+        ) {
+            console.error(
+                "Unable to preventDefault inside passive event listener invocation.",
+                data.passiveListener
+            );
+        }
+        return
+    }
+    if (!data.event.cancelable) {
+        return
+    }
+
+    data.canceled = true;
+    if (typeof data.event.preventDefault === "function") {
+        data.event.preventDefault();
+    }
+}
+
+/**
+ * @see https://dom.spec.whatwg.org/#interface-event
+ * @private
+ */
+/**
+ * The event wrapper.
+ * @constructor
+ * @param {EventTarget} eventTarget The event target of this dispatching.
+ * @param {Event|{type:string}} event The original event to wrap.
+ */
+function Event(eventTarget, event) {
+    privateData.set(this, {
+        eventTarget,
+        event,
+        eventPhase: 2,
+        currentTarget: eventTarget,
+        canceled: false,
+        stopped: false,
+        immediateStopped: false,
+        passiveListener: null,
+        timeStamp: event.timeStamp || Date.now(),
+    });
+
+    // https://heycam.github.io/webidl/#Unforgeable
+    Object.defineProperty(this, "isTrusted", { value: false, enumerable: true });
+
+    // Define accessors
+    const keys = Object.keys(event);
+    for (let i = 0; i < keys.length; ++i) {
+        const key = keys[i];
+        if (!(key in this)) {
+            Object.defineProperty(this, key, defineRedirectDescriptor(key));
+        }
+    }
+}
+
+// Should be enumerable, but class methods are not enumerable.
+Event.prototype = {
+    /**
+     * The type of this event.
+     * @type {string}
+     */
+    get type() {
+        return pd(this).event.type
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     */
+    get target() {
+        return pd(this).eventTarget
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     */
+    get currentTarget() {
+        return pd(this).currentTarget
+    },
+
+    /**
+     * @returns {EventTarget[]} The composed path of this event.
+     */
+    composedPath() {
+        const currentTarget = pd(this).currentTarget;
+        if (currentTarget == null) {
+            return []
+        }
+        return [currentTarget]
+    },
+
+    /**
+     * Constant of NONE.
+     * @type {number}
+     */
+    get NONE() {
+        return 0
+    },
+
+    /**
+     * Constant of CAPTURING_PHASE.
+     * @type {number}
+     */
+    get CAPTURING_PHASE() {
+        return 1
+    },
+
+    /**
+     * Constant of AT_TARGET.
+     * @type {number}
+     */
+    get AT_TARGET() {
+        return 2
+    },
+
+    /**
+     * Constant of BUBBLING_PHASE.
+     * @type {number}
+     */
+    get BUBBLING_PHASE() {
+        return 3
+    },
+
+    /**
+     * The target of this event.
+     * @type {number}
+     */
+    get eventPhase() {
+        return pd(this).eventPhase
+    },
+
+    /**
+     * Stop event bubbling.
+     * @returns {void}
+     */
+    stopPropagation() {
+        const data = pd(this);
+
+        data.stopped = true;
+        if (typeof data.event.stopPropagation === "function") {
+            data.event.stopPropagation();
+        }
+    },
+
+    /**
+     * Stop event bubbling.
+     * @returns {void}
+     */
+    stopImmediatePropagation() {
+        const data = pd(this);
+
+        data.stopped = true;
+        data.immediateStopped = true;
+        if (typeof data.event.stopImmediatePropagation === "function") {
+            data.event.stopImmediatePropagation();
+        }
+    },
+
+    /**
+     * The flag to be bubbling.
+     * @type {boolean}
+     */
+    get bubbles() {
+        return Boolean(pd(this).event.bubbles)
+    },
+
+    /**
+     * The flag to be cancelable.
+     * @type {boolean}
+     */
+    get cancelable() {
+        return Boolean(pd(this).event.cancelable)
+    },
+
+    /**
+     * Cancel this event.
+     * @returns {void}
+     */
+    preventDefault() {
+        setCancelFlag(pd(this));
+    },
+
+    /**
+     * The flag to indicate cancellation state.
+     * @type {boolean}
+     */
+    get defaultPrevented() {
+        return pd(this).canceled
+    },
+
+    /**
+     * The flag to be composed.
+     * @type {boolean}
+     */
+    get composed() {
+        return Boolean(pd(this).event.composed)
+    },
+
+    /**
+     * The unix time of this event.
+     * @type {number}
+     */
+    get timeStamp() {
+        return pd(this).timeStamp
+    },
+
+    /**
+     * The target of this event.
+     * @type {EventTarget}
+     * @deprecated
+     */
+    get srcElement() {
+        return pd(this).eventTarget
+    },
+
+    /**
+     * The flag to stop event bubbling.
+     * @type {boolean}
+     * @deprecated
+     */
+    get cancelBubble() {
+        return pd(this).stopped
+    },
+    set cancelBubble(value) {
+        if (!value) {
+            return
+        }
+        const data = pd(this);
+
+        data.stopped = true;
+        if (typeof data.event.cancelBubble === "boolean") {
+            data.event.cancelBubble = true;
+        }
+    },
+
+    /**
+     * The flag to indicate cancellation state.
+     * @type {boolean}
+     * @deprecated
+     */
+    get returnValue() {
+        return !pd(this).canceled
+    },
+    set returnValue(value) {
+        if (!value) {
+            setCancelFlag(pd(this));
+        }
+    },
+
+    /**
+     * Initialize this event object. But do nothing under event dispatching.
+     * @param {string} type The event type.
+     * @param {boolean} [bubbles=false] The flag to be possible to bubble up.
+     * @param {boolean} [cancelable=false] The flag to be possible to cancel.
+     * @deprecated
+     */
+    initEvent() {
+        // Do nothing.
+    },
+};
+
+// `constructor` is not enumerable.
+Object.defineProperty(Event.prototype, "constructor", {
+    value: Event,
+    configurable: true,
+    writable: true,
+});
+
+// Ensure `event instanceof window.Event` is `true`.
+if (typeof window !== "undefined" && typeof window.Event !== "undefined") {
+    Object.setPrototypeOf(Event.prototype, window.Event.prototype);
+
+    // Make association for wrappers.
+    wrappers.set(window.Event.prototype, Event);
+}
+
+/**
+ * Get the property descriptor to redirect a given property.
+ * @param {string} key Property name to define property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor to redirect the property.
+ * @private
+ */
+function defineRedirectDescriptor(key) {
+    return {
+        get() {
+            return pd(this).event[key]
+        },
+        set(value) {
+            pd(this).event[key] = value;
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Get the property descriptor to call a given method property.
+ * @param {string} key Property name to define property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor to call the method property.
+ * @private
+ */
+function defineCallDescriptor(key) {
+    return {
+        value() {
+            const event = pd(this).event;
+            return event[key].apply(event, arguments)
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Define new wrapper class.
+ * @param {Function} BaseEvent The base wrapper class.
+ * @param {Object} proto The prototype of the original event.
+ * @returns {Function} The defined wrapper class.
+ * @private
+ */
+function defineWrapper(BaseEvent, proto) {
+    const keys = Object.keys(proto);
+    if (keys.length === 0) {
+        return BaseEvent
+    }
+
+    /** CustomEvent */
+    function CustomEvent(eventTarget, event) {
+        BaseEvent.call(this, eventTarget, event);
+    }
+
+    CustomEvent.prototype = Object.create(BaseEvent.prototype, {
+        constructor: { value: CustomEvent, configurable: true, writable: true },
+    });
+
+    // Define accessors.
+    for (let i = 0; i < keys.length; ++i) {
+        const key = keys[i];
+        if (!(key in BaseEvent.prototype)) {
+            const descriptor = Object.getOwnPropertyDescriptor(proto, key);
+            const isFunc = typeof descriptor.value === "function";
+            Object.defineProperty(
+                CustomEvent.prototype,
+                key,
+                isFunc
+                    ? defineCallDescriptor(key)
+                    : defineRedirectDescriptor(key)
+            );
+        }
+    }
+
+    return CustomEvent
+}
+
+/**
+ * Get the wrapper class of a given prototype.
+ * @param {Object} proto The prototype of the original event to get its wrapper.
+ * @returns {Function} The wrapper class.
+ * @private
+ */
+function getWrapper(proto) {
+    if (proto == null || proto === Object.prototype) {
+        return Event
+    }
+
+    let wrapper = wrappers.get(proto);
+    if (wrapper == null) {
+        wrapper = defineWrapper(getWrapper(Object.getPrototypeOf(proto)), proto);
+        wrappers.set(proto, wrapper);
+    }
+    return wrapper
+}
+
+/**
+ * Wrap a given event to management a dispatching.
+ * @param {EventTarget} eventTarget The event target of this dispatching.
+ * @param {Object} event The event to wrap.
+ * @returns {Event} The wrapper instance.
+ * @private
+ */
+function wrapEvent(eventTarget, event) {
+    const Wrapper = getWrapper(Object.getPrototypeOf(event));
+    return new Wrapper(eventTarget, event)
+}
+
+/**
+ * Get the immediateStopped flag of a given event.
+ * @param {Event} event The event to get.
+ * @returns {boolean} The flag to stop propagation immediately.
+ * @private
+ */
+function isStopped(event) {
+    return pd(event).immediateStopped
+}
+
+/**
+ * Set the current event phase of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {number} eventPhase New event phase.
+ * @returns {void}
+ * @private
+ */
+function setEventPhase(event, eventPhase) {
+    pd(event).eventPhase = eventPhase;
+}
+
+/**
+ * Set the current target of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {EventTarget|null} currentTarget New current target.
+ * @returns {void}
+ * @private
+ */
+function setCurrentTarget(event, currentTarget) {
+    pd(event).currentTarget = currentTarget;
+}
+
+/**
+ * Set a passive listener of a given event.
+ * @param {Event} event The event to set current target.
+ * @param {Function|null} passiveListener New passive listener.
+ * @returns {void}
+ * @private
+ */
+function setPassiveListener(event, passiveListener) {
+    pd(event).passiveListener = passiveListener;
+}
+
+/**
+ * @typedef {object} ListenerNode
+ * @property {Function} listener
+ * @property {1|2|3} listenerType
+ * @property {boolean} passive
+ * @property {boolean} once
+ * @property {ListenerNode|null} next
+ * @private
+ */
+
+/**
+ * @type {WeakMap<object, Map<string, ListenerNode>>}
+ * @private
+ */
+const listenersMap = new WeakMap();
+
+// Listener types
+const CAPTURE = 1;
+const BUBBLE = 2;
+const ATTRIBUTE = 3;
+
+/**
+ * Check whether a given value is an object or not.
+ * @param {any} x The value to check.
+ * @returns {boolean} `true` if the value is an object.
+ */
+function isObject(x) {
+    return x !== null && typeof x === "object" //eslint-disable-line no-restricted-syntax
+}
+
+/**
+ * Get listeners.
+ * @param {EventTarget} eventTarget The event target to get.
+ * @returns {Map<string, ListenerNode>} The listeners.
+ * @private
+ */
+function getListeners(eventTarget) {
+    const listeners = listenersMap.get(eventTarget);
+    if (listeners == null) {
+        throw new TypeError(
+            "'this' is expected an EventTarget object, but got another value."
+        )
+    }
+    return listeners
+}
+
+/**
+ * Get the property descriptor for the event attribute of a given event.
+ * @param {string} eventName The event name to get property descriptor.
+ * @returns {PropertyDescriptor} The property descriptor.
+ * @private
+ */
+function defineEventAttributeDescriptor(eventName) {
+    return {
+        get() {
+            const listeners = getListeners(this);
+            let node = listeners.get(eventName);
+            while (node != null) {
+                if (node.listenerType === ATTRIBUTE) {
+                    return node.listener
+                }
+                node = node.next;
+            }
+            return null
+        },
+
+        set(listener) {
+            if (typeof listener !== "function" && !isObject(listener)) {
+                listener = null; // eslint-disable-line no-param-reassign
+            }
+            const listeners = getListeners(this);
+
+            // Traverse to the tail while removing old value.
+            let prev = null;
+            let node = listeners.get(eventName);
+            while (node != null) {
+                if (node.listenerType === ATTRIBUTE) {
+                    // Remove old value.
+                    if (prev !== null) {
+                        prev.next = node.next;
+                    } else if (node.next !== null) {
+                        listeners.set(eventName, node.next);
+                    } else {
+                        listeners.delete(eventName);
+                    }
+                } else {
+                    prev = node;
+                }
+
+                node = node.next;
+            }
+
+            // Add new value.
+            if (listener !== null) {
+                const newNode = {
+                    listener,
+                    listenerType: ATTRIBUTE,
+                    passive: false,
+                    once: false,
+                    next: null,
+                };
+                if (prev === null) {
+                    listeners.set(eventName, newNode);
+                } else {
+                    prev.next = newNode;
+                }
+            }
+        },
+        configurable: true,
+        enumerable: true,
+    }
+}
+
+/**
+ * Define an event attribute (e.g. `eventTarget.onclick`).
+ * @param {Object} eventTargetPrototype The event target prototype to define an event attrbite.
+ * @param {string} eventName The event name to define.
+ * @returns {void}
+ */
+function defineEventAttribute(eventTargetPrototype, eventName) {
+    Object.defineProperty(
+        eventTargetPrototype,
+        `on${eventName}`,
+        defineEventAttributeDescriptor(eventName)
+    );
+}
+
+/**
+ * Define a custom EventTarget with event attributes.
+ * @param {string[]} eventNames Event names for event attributes.
+ * @returns {EventTarget} The custom EventTarget.
+ * @private
+ */
+function defineCustomEventTarget(eventNames) {
+    /** CustomEventTarget */
+    function CustomEventTarget() {
+        EventTarget.call(this);
+    }
+
+    CustomEventTarget.prototype = Object.create(EventTarget.prototype, {
+        constructor: {
+            value: CustomEventTarget,
+            configurable: true,
+            writable: true,
+        },
+    });
+
+    for (let i = 0; i < eventNames.length; ++i) {
+        defineEventAttribute(CustomEventTarget.prototype, eventNames[i]);
+    }
+
+    return CustomEventTarget
+}
+
+/**
+ * EventTarget.
+ *
+ * - This is constructor if no arguments.
+ * - This is a function which returns a CustomEventTarget constructor if there are arguments.
+ *
+ * For example:
+ *
+ *     class A extends EventTarget {}
+ *     class B extends EventTarget("message") {}
+ *     class C extends EventTarget("message", "error") {}
+ *     class D extends EventTarget(["message", "error"]) {}
+ */
+function EventTarget() {
+    /*eslint-disable consistent-return */
+    if (this instanceof EventTarget) {
+        listenersMap.set(this, new Map());
+        return
+    }
+    if (arguments.length === 1 && Array.isArray(arguments[0])) {
+        return defineCustomEventTarget(arguments[0])
+    }
+    if (arguments.length > 0) {
+        const types = new Array(arguments.length);
+        for (let i = 0; i < arguments.length; ++i) {
+            types[i] = arguments[i];
+        }
+        return defineCustomEventTarget(types)
+    }
+    throw new TypeError("Cannot call a class as a function")
+    /*eslint-enable consistent-return */
+}
+
+// Should be enumerable, but class methods are not enumerable.
+EventTarget.prototype = {
+    /**
+     * Add a given listener to this event target.
+     * @param {string} eventName The event name to add.
+     * @param {Function} listener The listener to add.
+     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.
+     * @returns {void}
+     */
+    addEventListener(eventName, listener, options) {
+        if (listener == null) {
+            return
+        }
+        if (typeof listener !== "function" && !isObject(listener)) {
+            throw new TypeError("'listener' should be a function or an object.")
+        }
+
+        const listeners = getListeners(this);
+        const optionsIsObj = isObject(options);
+        const capture = optionsIsObj
+            ? Boolean(options.capture)
+            : Boolean(options);
+        const listenerType = capture ? CAPTURE : BUBBLE;
+        const newNode = {
+            listener,
+            listenerType,
+            passive: optionsIsObj && Boolean(options.passive),
+            once: optionsIsObj && Boolean(options.once),
+            next: null,
+        };
+
+        // Set it as the first node if the first node is null.
+        let node = listeners.get(eventName);
+        if (node === undefined) {
+            listeners.set(eventName, newNode);
+            return
+        }
+
+        // Traverse to the tail while checking duplication..
+        let prev = null;
+        while (node != null) {
+            if (
+                node.listener === listener &&
+                node.listenerType === listenerType
+            ) {
+                // Should ignore duplication.
+                return
+            }
+            prev = node;
+            node = node.next;
+        }
+
+        // Add it.
+        prev.next = newNode;
+    },
+
+    /**
+     * Remove a given listener from this event target.
+     * @param {string} eventName The event name to remove.
+     * @param {Function} listener The listener to remove.
+     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.
+     * @returns {void}
+     */
+    removeEventListener(eventName, listener, options) {
+        if (listener == null) {
+            return
+        }
+
+        const listeners = getListeners(this);
+        const capture = isObject(options)
+            ? Boolean(options.capture)
+            : Boolean(options);
+        const listenerType = capture ? CAPTURE : BUBBLE;
+
+        let prev = null;
+        let node = listeners.get(eventName);
+        while (node != null) {
+            if (
+                node.listener === listener &&
+                node.listenerType === listenerType
+            ) {
+                if (prev !== null) {
+                    prev.next = node.next;
+                } else if (node.next !== null) {
+                    listeners.set(eventName, node.next);
+                } else {
+                    listeners.delete(eventName);
+                }
+                return
+            }
+
+            prev = node;
+            node = node.next;
+        }
+    },
+
+    /**
+     * Dispatch a given event.
+     * @param {Event|{type:string}} event The event to dispatch.
+     * @returns {boolean} `false` if canceled.
+     */
+    dispatchEvent(event) {
+        if (event == null || typeof event.type !== "string") {
+            throw new TypeError('"event.type" should be a string.')
+        }
+
+        // If listeners aren't registered, terminate.
+        const listeners = getListeners(this);
+        const eventName = event.type;
+        let node = listeners.get(eventName);
+        if (node == null) {
+            return true
+        }
+
+        // Since we cannot rewrite several properties, so wrap object.
+        const wrappedEvent = wrapEvent(this, event);
+
+        // This doesn't process capturing phase and bubbling phase.
+        // This isn't participating in a tree.
+        let prev = null;
+        while (node != null) {
+            // Remove this listener if it's once
+            if (node.once) {
+                if (prev !== null) {
+                    prev.next = node.next;
+                } else if (node.next !== null) {
+                    listeners.set(eventName, node.next);
+                } else {
+                    listeners.delete(eventName);
+                }
+            } else {
+                prev = node;
+            }
+
+            // Call this listener
+            setPassiveListener(
+                wrappedEvent,
+                node.passive ? node.listener : null
+            );
+            if (typeof node.listener === "function") {
+                try {
+                    node.listener.call(this, wrappedEvent);
+                } catch (err) {
+                    if (
+                        typeof console !== "undefined" &&
+                        typeof console.error === "function"
+                    ) {
+                        console.error(err);
+                    }
+                }
+            } else if (
+                node.listenerType !== ATTRIBUTE &&
+                typeof node.listener.handleEvent === "function"
+            ) {
+                node.listener.handleEvent(wrappedEvent);
+            }
+
+            // Break if `event.stopImmediatePropagation` was called.
+            if (isStopped(wrappedEvent)) {
+                break
+            }
+
+            node = node.next;
+        }
+        setPassiveListener(wrappedEvent, null);
+        setEventPhase(wrappedEvent, 0);
+        setCurrentTarget(wrappedEvent, null);
+
+        return !wrappedEvent.defaultPrevented
+    },
+};
+
+// `constructor` is not enumerable.
+Object.defineProperty(EventTarget.prototype, "constructor", {
+    value: EventTarget,
+    configurable: true,
+    writable: true,
+});
+
+// Ensure `eventTarget instanceof window.EventTarget` is `true`.
+if (
+    typeof window !== "undefined" &&
+    typeof window.EventTarget !== "undefined"
+) {
+    Object.setPrototypeOf(EventTarget.prototype, window.EventTarget.prototype);
+}
+
+export default EventTarget;
+export { defineEventAttribute, EventTarget };
+//# sourceMappingURL=event-target-shim.mjs.map
diff --git a/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.mjs.map b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.mjs.map
new file mode 100644
index 0000000..57b3e8f
--- /dev/null
+++ b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.mjs.map
@@ -0,0 +1 @@
+{"version":3,"file":"event-target-shim.mjs","sources":["../src/event.mjs","../src/event-target.mjs"],"sourcesContent":["/**\n * @typedef {object} PrivateData\n * @property {EventTarget} eventTarget The event target.\n * @property {{type:string}} event The original event object.\n * @property {number} eventPhase The current event phase.\n * @property {EventTarget|null} currentTarget The current event target.\n * @property {boolean} canceled The flag to prevent default.\n * @property {boolean} stopped The flag to stop propagation.\n * @property {boolean} immediateStopped The flag to stop propagation immediately.\n * @property {Function|null} passiveListener The listener if the current listener is passive. Otherwise this is null.\n * @property {number} timeStamp The unix time.\n * @private\n */\n\n/**\n * Private data for event wrappers.\n * @type {WeakMap<Event, PrivateData>}\n * @private\n */\nconst privateData = new WeakMap()\n\n/**\n * Cache for wrapper classes.\n * @type {WeakMap<Object, Function>}\n * @private\n */\nconst wrappers = new WeakMap()\n\n/**\n * Get private data.\n * @param {Event} event The event object to get private data.\n * @returns {PrivateData} The private data of the event.\n * @private\n */\nfunction pd(event) {\n    const retv = privateData.get(event)\n    console.assert(\n        retv != null,\n        \"'this' is expected an Event object, but got\",\n        event\n    )\n    return retv\n}\n\n/**\n * https://dom.spec.whatwg.org/#set-the-canceled-flag\n * @param data {PrivateData} private data.\n */\nfunction setCancelFlag(data) {\n    if (data.passiveListener != null) {\n        if (\n            typeof console !== \"undefined\" &&\n            typeof console.error === \"function\"\n        ) {\n            console.error(\n                \"Unable to preventDefault inside passive event listener invocation.\",\n                data.passiveListener\n            )\n        }\n        return\n    }\n    if (!data.event.cancelable) {\n        return\n    }\n\n    data.canceled = true\n    if (typeof data.event.preventDefault === \"function\") {\n        data.event.preventDefault()\n    }\n}\n\n/**\n * @see https://dom.spec.whatwg.org/#interface-event\n * @private\n */\n/**\n * The event wrapper.\n * @constructor\n * @param {EventTarget} eventTarget The event target of this dispatching.\n * @param {Event|{type:string}} event The original event to wrap.\n */\nfunction Event(eventTarget, event) {\n    privateData.set(this, {\n        eventTarget,\n        event,\n        eventPhase: 2,\n        currentTarget: eventTarget,\n        canceled: false,\n        stopped: false,\n        immediateStopped: false,\n        passiveListener: null,\n        timeStamp: event.timeStamp || Date.now(),\n    })\n\n    // https://heycam.github.io/webidl/#Unforgeable\n    Object.defineProperty(this, \"isTrusted\", { value: false, enumerable: true })\n\n    // Define accessors\n    const keys = Object.keys(event)\n    for (let i = 0; i < keys.length; ++i) {\n        const key = keys[i]\n        if (!(key in this)) {\n            Object.defineProperty(this, key, defineRedirectDescriptor(key))\n        }\n    }\n}\n\n// Should be enumerable, but class methods are not enumerable.\nEvent.prototype = {\n    /**\n     * The type of this event.\n     * @type {string}\n     */\n    get type() {\n        return pd(this).event.type\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     */\n    get target() {\n        return pd(this).eventTarget\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     */\n    get currentTarget() {\n        return pd(this).currentTarget\n    },\n\n    /**\n     * @returns {EventTarget[]} The composed path of this event.\n     */\n    composedPath() {\n        const currentTarget = pd(this).currentTarget\n        if (currentTarget == null) {\n            return []\n        }\n        return [currentTarget]\n    },\n\n    /**\n     * Constant of NONE.\n     * @type {number}\n     */\n    get NONE() {\n        return 0\n    },\n\n    /**\n     * Constant of CAPTURING_PHASE.\n     * @type {number}\n     */\n    get CAPTURING_PHASE() {\n        return 1\n    },\n\n    /**\n     * Constant of AT_TARGET.\n     * @type {number}\n     */\n    get AT_TARGET() {\n        return 2\n    },\n\n    /**\n     * Constant of BUBBLING_PHASE.\n     * @type {number}\n     */\n    get BUBBLING_PHASE() {\n        return 3\n    },\n\n    /**\n     * The target of this event.\n     * @type {number}\n     */\n    get eventPhase() {\n        return pd(this).eventPhase\n    },\n\n    /**\n     * Stop event bubbling.\n     * @returns {void}\n     */\n    stopPropagation() {\n        const data = pd(this)\n\n        data.stopped = true\n        if (typeof data.event.stopPropagation === \"function\") {\n            data.event.stopPropagation()\n        }\n    },\n\n    /**\n     * Stop event bubbling.\n     * @returns {void}\n     */\n    stopImmediatePropagation() {\n        const data = pd(this)\n\n        data.stopped = true\n        data.immediateStopped = true\n        if (typeof data.event.stopImmediatePropagation === \"function\") {\n            data.event.stopImmediatePropagation()\n        }\n    },\n\n    /**\n     * The flag to be bubbling.\n     * @type {boolean}\n     */\n    get bubbles() {\n        return Boolean(pd(this).event.bubbles)\n    },\n\n    /**\n     * The flag to be cancelable.\n     * @type {boolean}\n     */\n    get cancelable() {\n        return Boolean(pd(this).event.cancelable)\n    },\n\n    /**\n     * Cancel this event.\n     * @returns {void}\n     */\n    preventDefault() {\n        setCancelFlag(pd(this))\n    },\n\n    /**\n     * The flag to indicate cancellation state.\n     * @type {boolean}\n     */\n    get defaultPrevented() {\n        return pd(this).canceled\n    },\n\n    /**\n     * The flag to be composed.\n     * @type {boolean}\n     */\n    get composed() {\n        return Boolean(pd(this).event.composed)\n    },\n\n    /**\n     * The unix time of this event.\n     * @type {number}\n     */\n    get timeStamp() {\n        return pd(this).timeStamp\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     * @deprecated\n     */\n    get srcElement() {\n        return pd(this).eventTarget\n    },\n\n    /**\n     * The flag to stop event bubbling.\n     * @type {boolean}\n     * @deprecated\n     */\n    get cancelBubble() {\n        return pd(this).stopped\n    },\n    set cancelBubble(value) {\n        if (!value) {\n            return\n        }\n        const data = pd(this)\n\n        data.stopped = true\n        if (typeof data.event.cancelBubble === \"boolean\") {\n            data.event.cancelBubble = true\n        }\n    },\n\n    /**\n     * The flag to indicate cancellation state.\n     * @type {boolean}\n     * @deprecated\n     */\n    get returnValue() {\n        return !pd(this).canceled\n    },\n    set returnValue(value) {\n        if (!value) {\n            setCancelFlag(pd(this))\n        }\n    },\n\n    /**\n     * Initialize this event object. But do nothing under event dispatching.\n     * @param {string} type The event type.\n     * @param {boolean} [bubbles=false] The flag to be possible to bubble up.\n     * @param {boolean} [cancelable=false] The flag to be possible to cancel.\n     * @deprecated\n     */\n    initEvent() {\n        // Do nothing.\n    },\n}\n\n// `constructor` is not enumerable.\nObject.defineProperty(Event.prototype, \"constructor\", {\n    value: Event,\n    configurable: true,\n    writable: true,\n})\n\n// Ensure `event instanceof window.Event` is `true`.\nif (typeof window !== \"undefined\" && typeof window.Event !== \"undefined\") {\n    Object.setPrototypeOf(Event.prototype, window.Event.prototype)\n\n    // Make association for wrappers.\n    wrappers.set(window.Event.prototype, Event)\n}\n\n/**\n * Get the property descriptor to redirect a given property.\n * @param {string} key Property name to define property descriptor.\n * @returns {PropertyDescriptor} The property descriptor to redirect the property.\n * @private\n */\nfunction defineRedirectDescriptor(key) {\n    return {\n        get() {\n            return pd(this).event[key]\n        },\n        set(value) {\n            pd(this).event[key] = value\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Get the property descriptor to call a given method property.\n * @param {string} key Property name to define property descriptor.\n * @returns {PropertyDescriptor} The property descriptor to call the method property.\n * @private\n */\nfunction defineCallDescriptor(key) {\n    return {\n        value() {\n            const event = pd(this).event\n            return event[key].apply(event, arguments)\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Define new wrapper class.\n * @param {Function} BaseEvent The base wrapper class.\n * @param {Object} proto The prototype of the original event.\n * @returns {Function} The defined wrapper class.\n * @private\n */\nfunction defineWrapper(BaseEvent, proto) {\n    const keys = Object.keys(proto)\n    if (keys.length === 0) {\n        return BaseEvent\n    }\n\n    /** CustomEvent */\n    function CustomEvent(eventTarget, event) {\n        BaseEvent.call(this, eventTarget, event)\n    }\n\n    CustomEvent.prototype = Object.create(BaseEvent.prototype, {\n        constructor: { value: CustomEvent, configurable: true, writable: true },\n    })\n\n    // Define accessors.\n    for (let i = 0; i < keys.length; ++i) {\n        const key = keys[i]\n        if (!(key in BaseEvent.prototype)) {\n            const descriptor = Object.getOwnPropertyDescriptor(proto, key)\n            const isFunc = typeof descriptor.value === \"function\"\n            Object.defineProperty(\n                CustomEvent.prototype,\n                key,\n                isFunc\n                    ? defineCallDescriptor(key)\n                    : defineRedirectDescriptor(key)\n            )\n        }\n    }\n\n    return CustomEvent\n}\n\n/**\n * Get the wrapper class of a given prototype.\n * @param {Object} proto The prototype of the original event to get its wrapper.\n * @returns {Function} The wrapper class.\n * @private\n */\nfunction getWrapper(proto) {\n    if (proto == null || proto === Object.prototype) {\n        return Event\n    }\n\n    let wrapper = wrappers.get(proto)\n    if (wrapper == null) {\n        wrapper = defineWrapper(getWrapper(Object.getPrototypeOf(proto)), proto)\n        wrappers.set(proto, wrapper)\n    }\n    return wrapper\n}\n\n/**\n * Wrap a given event to management a dispatching.\n * @param {EventTarget} eventTarget The event target of this dispatching.\n * @param {Object} event The event to wrap.\n * @returns {Event} The wrapper instance.\n * @private\n */\nexport function wrapEvent(eventTarget, event) {\n    const Wrapper = getWrapper(Object.getPrototypeOf(event))\n    return new Wrapper(eventTarget, event)\n}\n\n/**\n * Get the immediateStopped flag of a given event.\n * @param {Event} event The event to get.\n * @returns {boolean} The flag to stop propagation immediately.\n * @private\n */\nexport function isStopped(event) {\n    return pd(event).immediateStopped\n}\n\n/**\n * Set the current event phase of a given event.\n * @param {Event} event The event to set current target.\n * @param {number} eventPhase New event phase.\n * @returns {void}\n * @private\n */\nexport function setEventPhase(event, eventPhase) {\n    pd(event).eventPhase = eventPhase\n}\n\n/**\n * Set the current target of a given event.\n * @param {Event} event The event to set current target.\n * @param {EventTarget|null} currentTarget New current target.\n * @returns {void}\n * @private\n */\nexport function setCurrentTarget(event, currentTarget) {\n    pd(event).currentTarget = currentTarget\n}\n\n/**\n * Set a passive listener of a given event.\n * @param {Event} event The event to set current target.\n * @param {Function|null} passiveListener New passive listener.\n * @returns {void}\n * @private\n */\nexport function setPassiveListener(event, passiveListener) {\n    pd(event).passiveListener = passiveListener\n}\n","import {\n    isStopped,\n    setCurrentTarget,\n    setEventPhase,\n    setPassiveListener,\n    wrapEvent,\n} from \"./event.mjs\"\n\n/**\n * @typedef {object} ListenerNode\n * @property {Function} listener\n * @property {1|2|3} listenerType\n * @property {boolean} passive\n * @property {boolean} once\n * @property {ListenerNode|null} next\n * @private\n */\n\n/**\n * @type {WeakMap<object, Map<string, ListenerNode>>}\n * @private\n */\nconst listenersMap = new WeakMap()\n\n// Listener types\nconst CAPTURE = 1\nconst BUBBLE = 2\nconst ATTRIBUTE = 3\n\n/**\n * Check whether a given value is an object or not.\n * @param {any} x The value to check.\n * @returns {boolean} `true` if the value is an object.\n */\nfunction isObject(x) {\n    return x !== null && typeof x === \"object\" //eslint-disable-line no-restricted-syntax\n}\n\n/**\n * Get listeners.\n * @param {EventTarget} eventTarget The event target to get.\n * @returns {Map<string, ListenerNode>} The listeners.\n * @private\n */\nfunction getListeners(eventTarget) {\n    const listeners = listenersMap.get(eventTarget)\n    if (listeners == null) {\n        throw new TypeError(\n            \"'this' is expected an EventTarget object, but got another value.\"\n        )\n    }\n    return listeners\n}\n\n/**\n * Get the property descriptor for the event attribute of a given event.\n * @param {string} eventName The event name to get property descriptor.\n * @returns {PropertyDescriptor} The property descriptor.\n * @private\n */\nfunction defineEventAttributeDescriptor(eventName) {\n    return {\n        get() {\n            const listeners = getListeners(this)\n            let node = listeners.get(eventName)\n            while (node != null) {\n                if (node.listenerType === ATTRIBUTE) {\n                    return node.listener\n                }\n                node = node.next\n            }\n            return null\n        },\n\n        set(listener) {\n            if (typeof listener !== \"function\" && !isObject(listener)) {\n                listener = null // eslint-disable-line no-param-reassign\n            }\n            const listeners = getListeners(this)\n\n            // Traverse to the tail while removing old value.\n            let prev = null\n            let node = listeners.get(eventName)\n            while (node != null) {\n                if (node.listenerType === ATTRIBUTE) {\n                    // Remove old value.\n                    if (prev !== null) {\n                        prev.next = node.next\n                    } else if (node.next !== null) {\n                        listeners.set(eventName, node.next)\n                    } else {\n                        listeners.delete(eventName)\n                    }\n                } else {\n                    prev = node\n                }\n\n                node = node.next\n            }\n\n            // Add new value.\n            if (listener !== null) {\n                const newNode = {\n                    listener,\n                    listenerType: ATTRIBUTE,\n                    passive: false,\n                    once: false,\n                    next: null,\n                }\n                if (prev === null) {\n                    listeners.set(eventName, newNode)\n                } else {\n                    prev.next = newNode\n                }\n            }\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Define an event attribute (e.g. `eventTarget.onclick`).\n * @param {Object} eventTargetPrototype The event target prototype to define an event attrbite.\n * @param {string} eventName The event name to define.\n * @returns {void}\n */\nfunction defineEventAttribute(eventTargetPrototype, eventName) {\n    Object.defineProperty(\n        eventTargetPrototype,\n        `on${eventName}`,\n        defineEventAttributeDescriptor(eventName)\n    )\n}\n\n/**\n * Define a custom EventTarget with event attributes.\n * @param {string[]} eventNames Event names for event attributes.\n * @returns {EventTarget} The custom EventTarget.\n * @private\n */\nfunction defineCustomEventTarget(eventNames) {\n    /** CustomEventTarget */\n    function CustomEventTarget() {\n        EventTarget.call(this)\n    }\n\n    CustomEventTarget.prototype = Object.create(EventTarget.prototype, {\n        constructor: {\n            value: CustomEventTarget,\n            configurable: true,\n            writable: true,\n        },\n    })\n\n    for (let i = 0; i < eventNames.length; ++i) {\n        defineEventAttribute(CustomEventTarget.prototype, eventNames[i])\n    }\n\n    return CustomEventTarget\n}\n\n/**\n * EventTarget.\n *\n * - This is constructor if no arguments.\n * - This is a function which returns a CustomEventTarget constructor if there are arguments.\n *\n * For example:\n *\n *     class A extends EventTarget {}\n *     class B extends EventTarget(\"message\") {}\n *     class C extends EventTarget(\"message\", \"error\") {}\n *     class D extends EventTarget([\"message\", \"error\"]) {}\n */\nfunction EventTarget() {\n    /*eslint-disable consistent-return */\n    if (this instanceof EventTarget) {\n        listenersMap.set(this, new Map())\n        return\n    }\n    if (arguments.length === 1 && Array.isArray(arguments[0])) {\n        return defineCustomEventTarget(arguments[0])\n    }\n    if (arguments.length > 0) {\n        const types = new Array(arguments.length)\n        for (let i = 0; i < arguments.length; ++i) {\n            types[i] = arguments[i]\n        }\n        return defineCustomEventTarget(types)\n    }\n    throw new TypeError(\"Cannot call a class as a function\")\n    /*eslint-enable consistent-return */\n}\n\n// Should be enumerable, but class methods are not enumerable.\nEventTarget.prototype = {\n    /**\n     * Add a given listener to this event target.\n     * @param {string} eventName The event name to add.\n     * @param {Function} listener The listener to add.\n     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.\n     * @returns {void}\n     */\n    addEventListener(eventName, listener, options) {\n        if (listener == null) {\n            return\n        }\n        if (typeof listener !== \"function\" && !isObject(listener)) {\n            throw new TypeError(\"'listener' should be a function or an object.\")\n        }\n\n        const listeners = getListeners(this)\n        const optionsIsObj = isObject(options)\n        const capture = optionsIsObj\n            ? Boolean(options.capture)\n            : Boolean(options)\n        const listenerType = capture ? CAPTURE : BUBBLE\n        const newNode = {\n            listener,\n            listenerType,\n            passive: optionsIsObj && Boolean(options.passive),\n            once: optionsIsObj && Boolean(options.once),\n            next: null,\n        }\n\n        // Set it as the first node if the first node is null.\n        let node = listeners.get(eventName)\n        if (node === undefined) {\n            listeners.set(eventName, newNode)\n            return\n        }\n\n        // Traverse to the tail while checking duplication..\n        let prev = null\n        while (node != null) {\n            if (\n                node.listener === listener &&\n                node.listenerType === listenerType\n            ) {\n                // Should ignore duplication.\n                return\n            }\n            prev = node\n            node = node.next\n        }\n\n        // Add it.\n        prev.next = newNode\n    },\n\n    /**\n     * Remove a given listener from this event target.\n     * @param {string} eventName The event name to remove.\n     * @param {Function} listener The listener to remove.\n     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.\n     * @returns {void}\n     */\n    removeEventListener(eventName, listener, options) {\n        if (listener == null) {\n            return\n        }\n\n        const listeners = getListeners(this)\n        const capture = isObject(options)\n            ? Boolean(options.capture)\n            : Boolean(options)\n        const listenerType = capture ? CAPTURE : BUBBLE\n\n        let prev = null\n        let node = listeners.get(eventName)\n        while (node != null) {\n            if (\n                node.listener === listener &&\n                node.listenerType === listenerType\n            ) {\n                if (prev !== null) {\n                    prev.next = node.next\n                } else if (node.next !== null) {\n                    listeners.set(eventName, node.next)\n                } else {\n                    listeners.delete(eventName)\n                }\n                return\n            }\n\n            prev = node\n            node = node.next\n        }\n    },\n\n    /**\n     * Dispatch a given event.\n     * @param {Event|{type:string}} event The event to dispatch.\n     * @returns {boolean} `false` if canceled.\n     */\n    dispatchEvent(event) {\n        if (event == null || typeof event.type !== \"string\") {\n            throw new TypeError('\"event.type\" should be a string.')\n        }\n\n        // If listeners aren't registered, terminate.\n        const listeners = getListeners(this)\n        const eventName = event.type\n        let node = listeners.get(eventName)\n        if (node == null) {\n            return true\n        }\n\n        // Since we cannot rewrite several properties, so wrap object.\n        const wrappedEvent = wrapEvent(this, event)\n\n        // This doesn't process capturing phase and bubbling phase.\n        // This isn't participating in a tree.\n        let prev = null\n        while (node != null) {\n            // Remove this listener if it's once\n            if (node.once) {\n                if (prev !== null) {\n                    prev.next = node.next\n                } else if (node.next !== null) {\n                    listeners.set(eventName, node.next)\n                } else {\n                    listeners.delete(eventName)\n                }\n            } else {\n                prev = node\n            }\n\n            // Call this listener\n            setPassiveListener(\n                wrappedEvent,\n                node.passive ? node.listener : null\n            )\n            if (typeof node.listener === \"function\") {\n                try {\n                    node.listener.call(this, wrappedEvent)\n                } catch (err) {\n                    if (\n                        typeof console !== \"undefined\" &&\n                        typeof console.error === \"function\"\n                    ) {\n                        console.error(err)\n                    }\n                }\n            } else if (\n                node.listenerType !== ATTRIBUTE &&\n                typeof node.listener.handleEvent === \"function\"\n            ) {\n                node.listener.handleEvent(wrappedEvent)\n            }\n\n            // Break if `event.stopImmediatePropagation` was called.\n            if (isStopped(wrappedEvent)) {\n                break\n            }\n\n            node = node.next\n        }\n        setPassiveListener(wrappedEvent, null)\n        setEventPhase(wrappedEvent, 0)\n        setCurrentTarget(wrappedEvent, null)\n\n        return !wrappedEvent.defaultPrevented\n    },\n}\n\n// `constructor` is not enumerable.\nObject.defineProperty(EventTarget.prototype, \"constructor\", {\n    value: EventTarget,\n    configurable: true,\n    writable: true,\n})\n\n// Ensure `eventTarget instanceof window.EventTarget` is `true`.\nif (\n    typeof window !== \"undefined\" &&\n    typeof window.EventTarget !== \"undefined\"\n) {\n    Object.setPrototypeOf(EventTarget.prototype, window.EventTarget.prototype)\n}\n\nexport { defineEventAttribute, EventTarget }\nexport default 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diff --git a/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.umd.js b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.umd.js
new file mode 100644
index 0000000..e7cf5d4
--- /dev/null
+++ b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.umd.js
@@ -0,0 +1,6 @@
+/**
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ * @copyright 2015 Toru Nagashima. All rights reserved.
+ * See LICENSE file in root directory for full license.
+ */(function(a,b){"object"==typeof exports&&"undefined"!=typeof module?b(exports):"function"==typeof define&&define.amd?define(["exports"],b):(a=a||self,b(a.EventTargetShim={}))})(this,function(a){"use strict";function b(a){return b="function"==typeof Symbol&&"symbol"==typeof Symbol.iterator?function(a){return typeof a}:function(a){return a&&"function"==typeof Symbol&&a.constructor===Symbol&&a!==Symbol.prototype?"symbol":typeof a},b(a)}function c(a){var b=u.get(a);return console.assert(null!=b,"'this' is expected an Event object, but got",a),b}function d(a){return null==a.passiveListener?void(!a.event.cancelable||(a.canceled=!0,"function"==typeof a.event.preventDefault&&a.event.preventDefault())):void("undefined"!=typeof console&&"function"==typeof console.error&&console.error("Unable to preventDefault inside passive event listener invocation.",a.passiveListener))}function 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void(null===g?null===h.next?d.delete(a):d.set(a,h.next):g.next=h.next);g=h,h=h.next}},dispatchEvent:function(a){if(null==a||"string"!=typeof a.type)throw new TypeError("\"event.type\" should be a string.");var b=p(this),c=a.type,d=b.get(c);if(null==d)return!0;for(var e=j(this,a),f=null;null!=d;){if(d.once?null===f?null===d.next?b.delete(c):b.set(c,d.next):f.next=d.next:f=d,n(e,d.passive?d.listener:null),"function"==typeof d.listener)try{d.listener.call(this,e)}catch(a){"undefined"!=typeof console&&"function"==typeof console.error&&console.error(a)}else d.listenerType!==3&&"function"==typeof d.listener.handleEvent&&d.listener.handleEvent(e);if(k(e))break;d=d.next}return n(e,null),l(e,0),m(e,null),!e.defaultPrevented}},Object.defineProperty(t.prototype,"constructor",{value:t,configurable:!0,writable:!0}),"undefined"!=typeof window&&"undefined"!=typeof window.EventTarget&&Object.setPrototypeOf(t.prototype,window.EventTarget.prototype),a.defineEventAttribute=r,a.EventTarget=t,a.default=t,Object.defineProperty(a,"__esModule",{value:!0}),"undefined"==typeof module&&"undefined"==typeof define){var z=Function("return this")();z.EventTargetShim=t,z.EventTargetShim.defineEventAttribute=r}});
+//# sourceMappingURL=event-target-shim.umd.js.map
diff --git a/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.umd.js.map b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.umd.js.map
new file mode 100644
index 0000000..c5b2b60
--- /dev/null
+++ b/mqtt-backend/node_modules/event-target-shim/dist/event-target-shim.umd.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"event-target-shim.umd.js","sources":["../src/event.mjs","../src/event-target.mjs"],"sourcesContent":["/**\n * @typedef {object} PrivateData\n * @property {EventTarget} eventTarget The event target.\n * @property {{type:string}} event The original event object.\n * @property {number} eventPhase The current event phase.\n * @property {EventTarget|null} currentTarget The current event target.\n * @property {boolean} canceled The flag to prevent default.\n * @property {boolean} stopped The flag to stop propagation.\n * @property {boolean} immediateStopped The flag to stop propagation immediately.\n * @property {Function|null} passiveListener The listener if the current listener is passive. Otherwise this is null.\n * @property {number} timeStamp The unix time.\n * @private\n */\n\n/**\n * Private data for event wrappers.\n * @type {WeakMap<Event, PrivateData>}\n * @private\n */\nconst privateData = new WeakMap()\n\n/**\n * Cache for wrapper classes.\n * @type {WeakMap<Object, Function>}\n * @private\n */\nconst wrappers = new WeakMap()\n\n/**\n * Get private data.\n * @param {Event} event The event object to get private data.\n * @returns {PrivateData} The private data of the event.\n * @private\n */\nfunction pd(event) {\n    const retv = privateData.get(event)\n    console.assert(\n        retv != null,\n        \"'this' is expected an Event object, but got\",\n        event\n    )\n    return retv\n}\n\n/**\n * https://dom.spec.whatwg.org/#set-the-canceled-flag\n * @param data {PrivateData} private data.\n */\nfunction setCancelFlag(data) {\n    if (data.passiveListener != null) {\n        if (\n            typeof console !== \"undefined\" &&\n            typeof console.error === \"function\"\n        ) {\n            console.error(\n                \"Unable to preventDefault inside passive event listener invocation.\",\n                data.passiveListener\n            )\n        }\n        return\n    }\n    if (!data.event.cancelable) {\n        return\n    }\n\n    data.canceled = true\n    if (typeof data.event.preventDefault === \"function\") {\n        data.event.preventDefault()\n    }\n}\n\n/**\n * @see https://dom.spec.whatwg.org/#interface-event\n * @private\n */\n/**\n * The event wrapper.\n * @constructor\n * @param {EventTarget} eventTarget The event target of this dispatching.\n * @param {Event|{type:string}} event The original event to wrap.\n */\nfunction Event(eventTarget, event) {\n    privateData.set(this, {\n        eventTarget,\n        event,\n        eventPhase: 2,\n        currentTarget: eventTarget,\n        canceled: false,\n        stopped: false,\n        immediateStopped: false,\n        passiveListener: null,\n        timeStamp: event.timeStamp || Date.now(),\n    })\n\n    // https://heycam.github.io/webidl/#Unforgeable\n    Object.defineProperty(this, \"isTrusted\", { value: false, enumerable: true })\n\n    // Define accessors\n    const keys = Object.keys(event)\n    for (let i = 0; i < keys.length; ++i) {\n        const key = keys[i]\n        if (!(key in this)) {\n            Object.defineProperty(this, key, defineRedirectDescriptor(key))\n        }\n    }\n}\n\n// Should be enumerable, but class methods are not enumerable.\nEvent.prototype = {\n    /**\n     * The type of this event.\n     * @type {string}\n     */\n    get type() {\n        return pd(this).event.type\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     */\n    get target() {\n        return pd(this).eventTarget\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     */\n    get currentTarget() {\n        return pd(this).currentTarget\n    },\n\n    /**\n     * @returns {EventTarget[]} The composed path of this event.\n     */\n    composedPath() {\n        const currentTarget = pd(this).currentTarget\n        if (currentTarget == null) {\n            return []\n        }\n        return [currentTarget]\n    },\n\n    /**\n     * Constant of NONE.\n     * @type {number}\n     */\n    get NONE() {\n        return 0\n    },\n\n    /**\n     * Constant of CAPTURING_PHASE.\n     * @type {number}\n     */\n    get CAPTURING_PHASE() {\n        return 1\n    },\n\n    /**\n     * Constant of AT_TARGET.\n     * @type {number}\n     */\n    get AT_TARGET() {\n        return 2\n    },\n\n    /**\n     * Constant of BUBBLING_PHASE.\n     * @type {number}\n     */\n    get BUBBLING_PHASE() {\n        return 3\n    },\n\n    /**\n     * The target of this event.\n     * @type {number}\n     */\n    get eventPhase() {\n        return pd(this).eventPhase\n    },\n\n    /**\n     * Stop event bubbling.\n     * @returns {void}\n     */\n    stopPropagation() {\n        const data = pd(this)\n\n        data.stopped = true\n        if (typeof data.event.stopPropagation === \"function\") {\n            data.event.stopPropagation()\n        }\n    },\n\n    /**\n     * Stop event bubbling.\n     * @returns {void}\n     */\n    stopImmediatePropagation() {\n        const data = pd(this)\n\n        data.stopped = true\n        data.immediateStopped = true\n        if (typeof data.event.stopImmediatePropagation === \"function\") {\n            data.event.stopImmediatePropagation()\n        }\n    },\n\n    /**\n     * The flag to be bubbling.\n     * @type {boolean}\n     */\n    get bubbles() {\n        return Boolean(pd(this).event.bubbles)\n    },\n\n    /**\n     * The flag to be cancelable.\n     * @type {boolean}\n     */\n    get cancelable() {\n        return Boolean(pd(this).event.cancelable)\n    },\n\n    /**\n     * Cancel this event.\n     * @returns {void}\n     */\n    preventDefault() {\n        setCancelFlag(pd(this))\n    },\n\n    /**\n     * The flag to indicate cancellation state.\n     * @type {boolean}\n     */\n    get defaultPrevented() {\n        return pd(this).canceled\n    },\n\n    /**\n     * The flag to be composed.\n     * @type {boolean}\n     */\n    get composed() {\n        return Boolean(pd(this).event.composed)\n    },\n\n    /**\n     * The unix time of this event.\n     * @type {number}\n     */\n    get timeStamp() {\n        return pd(this).timeStamp\n    },\n\n    /**\n     * The target of this event.\n     * @type {EventTarget}\n     * @deprecated\n     */\n    get srcElement() {\n        return pd(this).eventTarget\n    },\n\n    /**\n     * The flag to stop event bubbling.\n     * @type {boolean}\n     * @deprecated\n     */\n    get cancelBubble() {\n        return pd(this).stopped\n    },\n    set cancelBubble(value) {\n        if (!value) {\n            return\n        }\n        const data = pd(this)\n\n        data.stopped = true\n        if (typeof data.event.cancelBubble === \"boolean\") {\n            data.event.cancelBubble = true\n        }\n    },\n\n    /**\n     * The flag to indicate cancellation state.\n     * @type {boolean}\n     * @deprecated\n     */\n    get returnValue() {\n        return !pd(this).canceled\n    },\n    set returnValue(value) {\n        if (!value) {\n            setCancelFlag(pd(this))\n        }\n    },\n\n    /**\n     * Initialize this event object. But do nothing under event dispatching.\n     * @param {string} type The event type.\n     * @param {boolean} [bubbles=false] The flag to be possible to bubble up.\n     * @param {boolean} [cancelable=false] The flag to be possible to cancel.\n     * @deprecated\n     */\n    initEvent() {\n        // Do nothing.\n    },\n}\n\n// `constructor` is not enumerable.\nObject.defineProperty(Event.prototype, \"constructor\", {\n    value: Event,\n    configurable: true,\n    writable: true,\n})\n\n// Ensure `event instanceof window.Event` is `true`.\nif (typeof window !== \"undefined\" && typeof window.Event !== \"undefined\") {\n    Object.setPrototypeOf(Event.prototype, window.Event.prototype)\n\n    // Make association for wrappers.\n    wrappers.set(window.Event.prototype, Event)\n}\n\n/**\n * Get the property descriptor to redirect a given property.\n * @param {string} key Property name to define property descriptor.\n * @returns {PropertyDescriptor} The property descriptor to redirect the property.\n * @private\n */\nfunction defineRedirectDescriptor(key) {\n    return {\n        get() {\n            return pd(this).event[key]\n        },\n        set(value) {\n            pd(this).event[key] = value\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Get the property descriptor to call a given method property.\n * @param {string} key Property name to define property descriptor.\n * @returns {PropertyDescriptor} The property descriptor to call the method property.\n * @private\n */\nfunction defineCallDescriptor(key) {\n    return {\n        value() {\n            const event = pd(this).event\n            return event[key].apply(event, arguments)\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Define new wrapper class.\n * @param {Function} BaseEvent The base wrapper class.\n * @param {Object} proto The prototype of the original event.\n * @returns {Function} The defined wrapper class.\n * @private\n */\nfunction defineWrapper(BaseEvent, proto) {\n    const keys = Object.keys(proto)\n    if (keys.length === 0) {\n        return BaseEvent\n    }\n\n    /** CustomEvent */\n    function CustomEvent(eventTarget, event) {\n        BaseEvent.call(this, eventTarget, event)\n    }\n\n    CustomEvent.prototype = Object.create(BaseEvent.prototype, {\n        constructor: { value: CustomEvent, configurable: true, writable: true },\n    })\n\n    // Define accessors.\n    for (let i = 0; i < keys.length; ++i) {\n        const key = keys[i]\n        if (!(key in BaseEvent.prototype)) {\n            const descriptor = Object.getOwnPropertyDescriptor(proto, key)\n            const isFunc = typeof descriptor.value === \"function\"\n            Object.defineProperty(\n                CustomEvent.prototype,\n                key,\n                isFunc\n                    ? defineCallDescriptor(key)\n                    : defineRedirectDescriptor(key)\n            )\n        }\n    }\n\n    return CustomEvent\n}\n\n/**\n * Get the wrapper class of a given prototype.\n * @param {Object} proto The prototype of the original event to get its wrapper.\n * @returns {Function} The wrapper class.\n * @private\n */\nfunction getWrapper(proto) {\n    if (proto == null || proto === Object.prototype) {\n        return Event\n    }\n\n    let wrapper = wrappers.get(proto)\n    if (wrapper == null) {\n        wrapper = defineWrapper(getWrapper(Object.getPrototypeOf(proto)), proto)\n        wrappers.set(proto, wrapper)\n    }\n    return wrapper\n}\n\n/**\n * Wrap a given event to management a dispatching.\n * @param {EventTarget} eventTarget The event target of this dispatching.\n * @param {Object} event The event to wrap.\n * @returns {Event} The wrapper instance.\n * @private\n */\nexport function wrapEvent(eventTarget, event) {\n    const Wrapper = getWrapper(Object.getPrototypeOf(event))\n    return new Wrapper(eventTarget, event)\n}\n\n/**\n * Get the immediateStopped flag of a given event.\n * @param {Event} event The event to get.\n * @returns {boolean} The flag to stop propagation immediately.\n * @private\n */\nexport function isStopped(event) {\n    return pd(event).immediateStopped\n}\n\n/**\n * Set the current event phase of a given event.\n * @param {Event} event The event to set current target.\n * @param {number} eventPhase New event phase.\n * @returns {void}\n * @private\n */\nexport function setEventPhase(event, eventPhase) {\n    pd(event).eventPhase = eventPhase\n}\n\n/**\n * Set the current target of a given event.\n * @param {Event} event The event to set current target.\n * @param {EventTarget|null} currentTarget New current target.\n * @returns {void}\n * @private\n */\nexport function setCurrentTarget(event, currentTarget) {\n    pd(event).currentTarget = currentTarget\n}\n\n/**\n * Set a passive listener of a given event.\n * @param {Event} event The event to set current target.\n * @param {Function|null} passiveListener New passive listener.\n * @returns {void}\n * @private\n */\nexport function setPassiveListener(event, passiveListener) {\n    pd(event).passiveListener = passiveListener\n}\n","import {\n    isStopped,\n    setCurrentTarget,\n    setEventPhase,\n    setPassiveListener,\n    wrapEvent,\n} from \"./event.mjs\"\n\n/**\n * @typedef {object} ListenerNode\n * @property {Function} listener\n * @property {1|2|3} listenerType\n * @property {boolean} passive\n * @property {boolean} once\n * @property {ListenerNode|null} next\n * @private\n */\n\n/**\n * @type {WeakMap<object, Map<string, ListenerNode>>}\n * @private\n */\nconst listenersMap = new WeakMap()\n\n// Listener types\nconst CAPTURE = 1\nconst BUBBLE = 2\nconst ATTRIBUTE = 3\n\n/**\n * Check whether a given value is an object or not.\n * @param {any} x The value to check.\n * @returns {boolean} `true` if the value is an object.\n */\nfunction isObject(x) {\n    return x !== null && typeof x === \"object\" //eslint-disable-line no-restricted-syntax\n}\n\n/**\n * Get listeners.\n * @param {EventTarget} eventTarget The event target to get.\n * @returns {Map<string, ListenerNode>} The listeners.\n * @private\n */\nfunction getListeners(eventTarget) {\n    const listeners = listenersMap.get(eventTarget)\n    if (listeners == null) {\n        throw new TypeError(\n            \"'this' is expected an EventTarget object, but got another value.\"\n        )\n    }\n    return listeners\n}\n\n/**\n * Get the property descriptor for the event attribute of a given event.\n * @param {string} eventName The event name to get property descriptor.\n * @returns {PropertyDescriptor} The property descriptor.\n * @private\n */\nfunction defineEventAttributeDescriptor(eventName) {\n    return {\n        get() {\n            const listeners = getListeners(this)\n            let node = listeners.get(eventName)\n            while (node != null) {\n                if (node.listenerType === ATTRIBUTE) {\n                    return node.listener\n                }\n                node = node.next\n            }\n            return null\n        },\n\n        set(listener) {\n            if (typeof listener !== \"function\" && !isObject(listener)) {\n                listener = null // eslint-disable-line no-param-reassign\n            }\n            const listeners = getListeners(this)\n\n            // Traverse to the tail while removing old value.\n            let prev = null\n            let node = listeners.get(eventName)\n            while (node != null) {\n                if (node.listenerType === ATTRIBUTE) {\n                    // Remove old value.\n                    if (prev !== null) {\n                        prev.next = node.next\n                    } else if (node.next !== null) {\n                        listeners.set(eventName, node.next)\n                    } else {\n                        listeners.delete(eventName)\n                    }\n                } else {\n                    prev = node\n                }\n\n                node = node.next\n            }\n\n            // Add new value.\n            if (listener !== null) {\n                const newNode = {\n                    listener,\n                    listenerType: ATTRIBUTE,\n                    passive: false,\n                    once: false,\n                    next: null,\n                }\n                if (prev === null) {\n                    listeners.set(eventName, newNode)\n                } else {\n                    prev.next = newNode\n                }\n            }\n        },\n        configurable: true,\n        enumerable: true,\n    }\n}\n\n/**\n * Define an event attribute (e.g. `eventTarget.onclick`).\n * @param {Object} eventTargetPrototype The event target prototype to define an event attrbite.\n * @param {string} eventName The event name to define.\n * @returns {void}\n */\nfunction defineEventAttribute(eventTargetPrototype, eventName) {\n    Object.defineProperty(\n        eventTargetPrototype,\n        `on${eventName}`,\n        defineEventAttributeDescriptor(eventName)\n    )\n}\n\n/**\n * Define a custom EventTarget with event attributes.\n * @param {string[]} eventNames Event names for event attributes.\n * @returns {EventTarget} The custom EventTarget.\n * @private\n */\nfunction defineCustomEventTarget(eventNames) {\n    /** CustomEventTarget */\n    function CustomEventTarget() {\n        EventTarget.call(this)\n    }\n\n    CustomEventTarget.prototype = Object.create(EventTarget.prototype, {\n        constructor: {\n            value: CustomEventTarget,\n            configurable: true,\n            writable: true,\n        },\n    })\n\n    for (let i = 0; i < eventNames.length; ++i) {\n        defineEventAttribute(CustomEventTarget.prototype, eventNames[i])\n    }\n\n    return CustomEventTarget\n}\n\n/**\n * EventTarget.\n *\n * - This is constructor if no arguments.\n * - This is a function which returns a CustomEventTarget constructor if there are arguments.\n *\n * For example:\n *\n *     class A extends EventTarget {}\n *     class B extends EventTarget(\"message\") {}\n *     class C extends EventTarget(\"message\", \"error\") {}\n *     class D extends EventTarget([\"message\", \"error\"]) {}\n */\nfunction EventTarget() {\n    /*eslint-disable consistent-return */\n    if (this instanceof EventTarget) {\n        listenersMap.set(this, new Map())\n        return\n    }\n    if (arguments.length === 1 && Array.isArray(arguments[0])) {\n        return defineCustomEventTarget(arguments[0])\n    }\n    if (arguments.length > 0) {\n        const types = new Array(arguments.length)\n        for (let i = 0; i < arguments.length; ++i) {\n            types[i] = arguments[i]\n        }\n        return defineCustomEventTarget(types)\n    }\n    throw new TypeError(\"Cannot call a class as a function\")\n    /*eslint-enable consistent-return */\n}\n\n// Should be enumerable, but class methods are not enumerable.\nEventTarget.prototype = {\n    /**\n     * Add a given listener to this event target.\n     * @param {string} eventName The event name to add.\n     * @param {Function} listener The listener to add.\n     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.\n     * @returns {void}\n     */\n    addEventListener(eventName, listener, options) {\n        if (listener == null) {\n            return\n        }\n        if (typeof listener !== \"function\" && !isObject(listener)) {\n            throw new TypeError(\"'listener' should be a function or an object.\")\n        }\n\n        const listeners = getListeners(this)\n        const optionsIsObj = isObject(options)\n        const capture = optionsIsObj\n            ? Boolean(options.capture)\n            : Boolean(options)\n        const listenerType = capture ? CAPTURE : BUBBLE\n        const newNode = {\n            listener,\n            listenerType,\n            passive: optionsIsObj && Boolean(options.passive),\n            once: optionsIsObj && Boolean(options.once),\n            next: null,\n        }\n\n        // Set it as the first node if the first node is null.\n        let node = listeners.get(eventName)\n        if (node === undefined) {\n            listeners.set(eventName, newNode)\n            return\n        }\n\n        // Traverse to the tail while checking duplication..\n        let prev = null\n        while (node != null) {\n            if (\n                node.listener === listener &&\n                node.listenerType === listenerType\n            ) {\n                // Should ignore duplication.\n                return\n            }\n            prev = node\n            node = node.next\n        }\n\n        // Add it.\n        prev.next = newNode\n    },\n\n    /**\n     * Remove a given listener from this event target.\n     * @param {string} eventName The event name to remove.\n     * @param {Function} listener The listener to remove.\n     * @param {boolean|{capture?:boolean,passive?:boolean,once?:boolean}} [options] The options for this listener.\n     * @returns {void}\n     */\n    removeEventListener(eventName, listener, options) {\n        if (listener == null) {\n            return\n        }\n\n        const listeners = getListeners(this)\n        const capture = isObject(options)\n            ? Boolean(options.capture)\n            : Boolean(options)\n        const listenerType = capture ? CAPTURE : BUBBLE\n\n        let prev = null\n        let node = listeners.get(eventName)\n        while (node != null) {\n            if (\n                node.listener === listener &&\n                node.listenerType === listenerType\n            ) {\n                if (prev !== null) {\n                    prev.next = node.next\n                } else if (node.next !== null) {\n                    listeners.set(eventName, node.next)\n                } else {\n                    listeners.delete(eventName)\n                }\n                return\n            }\n\n            prev = node\n            node = node.next\n        }\n    },\n\n    /**\n     * Dispatch a given event.\n     * @param {Event|{type:string}} event The event to dispatch.\n     * @returns {boolean} `false` if canceled.\n     */\n    dispatchEvent(event) {\n        if (event == null || typeof event.type !== \"string\") {\n            throw new TypeError('\"event.type\" should be a string.')\n        }\n\n        // If listeners aren't registered, terminate.\n        const listeners = getListeners(this)\n        const eventName = event.type\n        let node = listeners.get(eventName)\n        if (node == null) {\n            return true\n        }\n\n        // Since we cannot rewrite several properties, so wrap object.\n        const wrappedEvent = wrapEvent(this, event)\n\n        // This doesn't process capturing phase and bubbling phase.\n        // This isn't participating in a tree.\n        let prev = null\n        while (node != null) {\n            // Remove this listener if it's once\n            if (node.once) {\n                if (prev !== null) {\n                    prev.next = node.next\n                } else if (node.next !== null) {\n                    listeners.set(eventName, node.next)\n                } else {\n                    listeners.delete(eventName)\n                }\n            } else {\n                prev = node\n            }\n\n            // Call this listener\n            setPassiveListener(\n                wrappedEvent,\n                node.passive ? node.listener : null\n            )\n            if (typeof node.listener === \"function\") {\n                try {\n                    node.listener.call(this, wrappedEvent)\n                } catch (err) {\n                    if (\n                        typeof console !== \"undefined\" &&\n                        typeof console.error === \"function\"\n                    ) {\n                        console.error(err)\n                    }\n                }\n            } else if (\n                node.listenerType !== ATTRIBUTE &&\n                typeof node.listener.handleEvent === \"function\"\n            ) {\n                node.listener.handleEvent(wrappedEvent)\n            }\n\n            // Break if `event.stopImmediatePropagation` was called.\n            if (isStopped(wrappedEvent)) {\n                break\n            }\n\n            node = node.next\n        }\n        setPassiveListener(wrappedEvent, null)\n        setEventPhase(wrappedEvent, 0)\n        setCurrentTarget(wrappedEvent, null)\n\n        return !wrappedEvent.defaultPrevented\n    },\n}\n\n// `constructor` is not enumerable.\nObject.defineProperty(EventTarget.prototype, \"constructor\", {\n    value: EventTarget,\n    configurable: true,\n    writable: true,\n})\n\n// Ensure `eventTarget instanceof window.EventTarget` is `true`.\nif (\n    typeof window !== \"undefined\" &&\n    typeof window.EventTarget !== \"undefined\"\n) {\n    Object.setPrototypeOf(EventTarget.prototype, window.EventTarget.prototype)\n}\n\nexport { defineEventAttribute, EventTarget }\nexport default 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\ No newline at end of file
diff --git a/mqtt-backend/node_modules/event-target-shim/index.d.ts b/mqtt-backend/node_modules/event-target-shim/index.d.ts
new file mode 100644
index 0000000..a303097
--- /dev/null
+++ b/mqtt-backend/node_modules/event-target-shim/index.d.ts
@@ -0,0 +1,399 @@
+export as namespace EventTargetShim
+
+/**
+ * `Event` interface.
+ * @see https://dom.spec.whatwg.org/#event
+ */
+export interface Event {
+    /**
+     * The type of this event.
+     */
+    readonly type: string
+
+    /**
+     * The target of this event.
+     */
+    readonly target: EventTarget<{}, {}, "standard"> | null
+
+    /**
+     * The current target of this event.
+     */
+    readonly currentTarget: EventTarget<{}, {}, "standard"> | null
+
+    /**
+     * The target of this event.
+     * @deprecated
+     */
+    readonly srcElement: any | null
+
+    /**
+     * The composed path of this event.
+     */
+    composedPath(): EventTarget<{}, {}, "standard">[]
+
+    /**
+     * Constant of NONE.
+     */
+    readonly NONE: number
+
+    /**
+     * Constant of CAPTURING_PHASE.
+     */
+    readonly CAPTURING_PHASE: number
+
+    /**
+     * Constant of BUBBLING_PHASE.
+     */
+    readonly BUBBLING_PHASE: number
+
+    /**
+     * Constant of AT_TARGET.
+     */
+    readonly AT_TARGET: number
+
+    /**
+     * Indicates which phase of the event flow is currently being evaluated.
+     */
+    readonly eventPhase: number
+
+    /**
+     * Stop event bubbling.
+     */
+    stopPropagation(): void
+
+    /**
+     * Stop event bubbling.
+     */
+    stopImmediatePropagation(): void
+
+    /**
+     * Initialize event.
+     * @deprecated
+     */
+    initEvent(type: string, bubbles?: boolean, cancelable?: boolean): void
+
+    /**
+     * The flag indicating bubbling.
+     */
+    readonly bubbles: boolean
+
+    /**
+     * Stop event bubbling.
+     * @deprecated
+     */
+    cancelBubble: boolean
+
+    /**
+     * Set or get cancellation flag.
+     * @deprecated
+     */
+    returnValue: boolean
+
+    /**
+     * The flag indicating whether the event can be canceled.
+     */
+    readonly cancelable: boolean
+
+    /**
+     * Cancel this event.
+     */
+    preventDefault(): void
+
+    /**
+     * The flag to indicating whether the event was canceled.
+     */
+    readonly defaultPrevented: boolean
+
+    /**
+     * The flag to indicating if event is composed.
+     */
+    readonly composed: boolean
+
+    /**
+     * Indicates whether the event was dispatched by the user agent.
+     */
+    readonly isTrusted: boolean
+
+    /**
+     * The unix time of this event.
+     */
+    readonly timeStamp: number
+}
+
+/**
+ * The constructor of `EventTarget` interface.
+ */
+export type EventTargetConstructor<
+    TEvents extends EventTarget.EventDefinition = {},
+    TEventAttributes extends EventTarget.EventDefinition = {},
+    TMode extends EventTarget.Mode = "loose"
+> = {
+    prototype: EventTarget<TEvents, TEventAttributes, TMode>
+    new(): EventTarget<TEvents, TEventAttributes, TMode>
+}
+
+/**
+ * `EventTarget` interface.
+ * @see https://dom.spec.whatwg.org/#interface-eventtarget
+ */
+export type EventTarget<
+    TEvents extends EventTarget.EventDefinition = {},
+    TEventAttributes extends EventTarget.EventDefinition = {},
+    TMode extends EventTarget.Mode = "loose"
+> = EventTarget.EventAttributes<TEventAttributes> & {
+    /**
+     * Add a given listener to this event target.
+     * @param eventName The event name to add.
+     * @param listener The listener to add.
+     * @param options The options for this listener.
+     */
+    addEventListener<TEventType extends EventTarget.EventType<TEvents, TMode>>(
+        type: TEventType,
+        listener:
+            | EventTarget.Listener<EventTarget.PickEvent<TEvents, TEventType>>
+            | null,
+        options?: boolean | EventTarget.AddOptions
+    ): void
+
+    /**
+     * Remove a given listener from this event target.
+     * @param eventName The event name to remove.
+     * @param listener The listener to remove.
+     * @param options The options for this listener.
+     */
+    removeEventListener<TEventType extends EventTarget.EventType<TEvents, TMode>>(
+        type: TEventType,
+        listener:
+            | EventTarget.Listener<EventTarget.PickEvent<TEvents, TEventType>>
+            | null,
+        options?: boolean | EventTarget.RemoveOptions
+    ): void
+
+    /**
+     * Dispatch a given event.
+     * @param event The event to dispatch.
+     * @returns `false` if canceled.
+     */
+    dispatchEvent<TEventType extends EventTarget.EventType<TEvents, TMode>>(
+        event: EventTarget.EventData<TEvents, TEventType, TMode>
+    ): boolean
+}
+
+export const EventTarget: EventTargetConstructor & {
+    /**
+     * Create an `EventTarget` instance with detailed event definition.
+     *
+     * The detailed event definition requires to use `defineEventAttribute()`
+     * function later.
+     *
+     * Unfortunately, the second type parameter `TEventAttributes` was needed
+     * because we cannot compute string literal types.
+     *
+     * @example
+     * const signal = new EventTarget<{ abort: Event }, { onabort: Event }>()
+     * defineEventAttribute(signal, "abort")
+     */
+    new <
+        TEvents extends EventTarget.EventDefinition,
+        TEventAttributes extends EventTarget.EventDefinition,
+        TMode extends EventTarget.Mode = "loose"
+    >(): EventTarget<TEvents, TEventAttributes, TMode>
+
+    /**
+     * Define an `EventTarget` constructor with attribute events and detailed event definition.
+     *
+     * Unfortunately, the second type parameter `TEventAttributes` was needed
+     * because we cannot compute string literal types.
+     *
+     * @example
+     * class AbortSignal extends EventTarget<{ abort: Event }, { onabort: Event }>("abort") {
+     *      abort(): void {}
+     * }
+     *
+     * @param events Optional event attributes (e.g. passing in `"click"` adds `onclick` to prototype).
+     */
+    <
+        TEvents extends EventTarget.EventDefinition = {},
+        TEventAttributes extends EventTarget.EventDefinition = {},
+        TMode extends EventTarget.Mode = "loose"
+    >(events: string[]): EventTargetConstructor<
+        TEvents,
+        TEventAttributes,
+        TMode
+    >
+
+    /**
+     * Define an `EventTarget` constructor with attribute events and detailed event definition.
+     *
+     * Unfortunately, the second type parameter `TEventAttributes` was needed
+     * because we cannot compute string literal types.
+     *
+     * @example
+     * class AbortSignal extends EventTarget<{ abort: Event }, { onabort: Event }>("abort") {
+     *      abort(): void {}
+     * }
+     *
+     * @param events Optional event attributes (e.g. passing in `"click"` adds `onclick` to prototype).
+     */
+    <
+        TEvents extends EventTarget.EventDefinition = {},
+        TEventAttributes extends EventTarget.EventDefinition = {},
+        TMode extends EventTarget.Mode = "loose"
+    >(event0: string, ...events: string[]): EventTargetConstructor<
+        TEvents,
+        TEventAttributes,
+        TMode
+    >
+}
+
+export namespace EventTarget {
+    /**
+     * Options of `removeEventListener()` method.
+     */
+    export interface RemoveOptions {
+        /**
+         * The flag to indicate that the listener is for the capturing phase.
+         */
+        capture?: boolean
+    }
+
+    /**
+     * Options of `addEventListener()` method.
+     */
+    export interface AddOptions extends RemoveOptions {
+        /**
+         * The flag to indicate that the listener doesn't support
+         * `event.preventDefault()` operation.
+         */
+        passive?: boolean
+        /**
+         * The flag to indicate that the listener will be removed on the first
+         * event.
+         */
+        once?: boolean
+    }
+
+    /**
+     * The type of regular listeners.
+     */
+    export interface FunctionListener<TEvent> {
+        (event: TEvent): void
+    }
+
+    /**
+     * The type of object listeners.
+     */
+    export interface ObjectListener<TEvent> {
+        handleEvent(event: TEvent): void
+    }
+
+    /**
+     * The type of listeners.
+     */
+    export type Listener<TEvent> =
+        | FunctionListener<TEvent>
+        | ObjectListener<TEvent>
+
+    /**
+     * Event definition.
+     */
+    export type EventDefinition = {
+        readonly [key: string]: Event
+    }
+
+    /**
+     * Mapped type for event attributes.
+     */
+    export type EventAttributes<TEventAttributes extends EventDefinition> = {
+        [P in keyof TEventAttributes]:
+            | FunctionListener<TEventAttributes[P]>
+            | null
+    }
+
+    /**
+     * The type of event data for `dispatchEvent()` method.
+     */
+    export type EventData<
+        TEvents extends EventDefinition,
+        TEventType extends keyof TEvents | string,
+        TMode extends Mode
+    > =
+        TEventType extends keyof TEvents
+            ? (
+                // Require properties which are not generated automatically.
+                & Pick<
+                    TEvents[TEventType],
+                    Exclude<keyof TEvents[TEventType], OmittableEventKeys>
+                >
+                // Properties which are generated automatically are optional.
+                & Partial<Pick<Event, OmittableEventKeys>>
+            )
+            : (
+                TMode extends "standard"
+                    ? Event
+                    : Event | NonStandardEvent
+            )
+
+    /**
+     * The string literal types of the properties which are generated
+     * automatically in `dispatchEvent()` method.
+     */
+    export type OmittableEventKeys = Exclude<keyof Event, "type">
+
+    /**
+     * The type of event data.
+     */
+    export type NonStandardEvent = {
+        [key: string]: any
+        type: string
+    }
+
+    /**
+     * The type of listeners.
+     */
+    export type PickEvent<
+        TEvents extends EventDefinition,
+        TEventType extends keyof TEvents | string,
+    > =
+        TEventType extends keyof TEvents
+            ? TEvents[TEventType]
+            : Event
+
+    /**
+     * Event type candidates.
+     */
+    export type EventType<
+        TEvents extends EventDefinition,
+        TMode extends Mode
+    > =
+        TMode extends "strict"
+            ? keyof TEvents
+            : keyof TEvents | string
+
+    /**
+     * - `"strict"` ..... Methods don't accept unknown events.
+     *                    `dispatchEvent()` accepts partial objects.
+     * - `"loose"` ...... Methods accept unknown events.
+     *                    `dispatchEvent()` accepts partial objects.
+     * - `"standard"` ... Methods accept unknown events.
+     *                    `dispatchEvent()` doesn't accept partial objects.
+     */
+    export type Mode = "strict" | "standard" | "loose"
+}
+
+/**
+ * Specialized `type` property.
+ */
+export type Type<T extends string> = { type: T }
+
+/**
+ * Define an event attribute (e.g. `eventTarget.onclick`).
+ * @param prototype The event target prototype to define an event attribute.
+ * @param eventName The event name to define.
+ */
+export function defineEventAttribute(
+    prototype: EventTarget,
+    eventName: string
+): void
+
+export default EventTarget
diff --git a/mqtt-backend/node_modules/event-target-shim/package.json b/mqtt-backend/node_modules/event-target-shim/package.json
new file mode 100644
index 0000000..40326f3
--- /dev/null
+++ b/mqtt-backend/node_modules/event-target-shim/package.json
@@ -0,0 +1,82 @@
+{
+  "name": "event-target-shim",
+  "version": "5.0.1",
+  "description": "An implementation of WHATWG EventTarget interface.",
+  "main": "dist/event-target-shim",
+  "types": "index.d.ts",
+  "files": [
+    "dist",
+    "index.d.ts"
+  ],
+  "engines": {
+    "node": ">=6"
+  },
+  "scripts": {
+    "preversion": "npm test",
+    "version": "npm run build && git add dist/*",
+    "postversion": "git push && git push --tags",
+    "clean": "rimraf .nyc_output coverage",
+    "coverage": "nyc report --reporter lcov && opener coverage/lcov-report/index.html",
+    "lint": "eslint src test scripts --ext .js,.mjs",
+    "build": "rollup -c scripts/rollup.config.js",
+    "pretest": "npm run lint",
+    "test": "run-s test:*",
+    "test:mocha": "nyc --require ./scripts/babel-register mocha test/*.mjs",
+    "test:karma": "karma start scripts/karma.conf.js --single-run",
+    "watch": "run-p watch:*",
+    "watch:mocha": "mocha test/*.mjs --require ./scripts/babel-register --watch --watch-extensions js,mjs --growl",
+    "watch:karma": "karma start scripts/karma.conf.js --watch",
+    "codecov": "codecov"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.2.2",
+    "@babel/plugin-transform-modules-commonjs": "^7.2.0",
+    "@babel/preset-env": "^7.2.3",
+    "@babel/register": "^7.0.0",
+    "@mysticatea/eslint-plugin": "^8.0.1",
+    "@mysticatea/spy": "^0.1.2",
+    "assert": "^1.4.1",
+    "codecov": "^3.1.0",
+    "eslint": "^5.12.1",
+    "karma": "^3.1.4",
+    "karma-chrome-launcher": "^2.2.0",
+    "karma-coverage": "^1.1.2",
+    "karma-firefox-launcher": "^1.0.0",
+    "karma-growl-reporter": "^1.0.0",
+    "karma-ie-launcher": "^1.0.0",
+    "karma-mocha": "^1.3.0",
+    "karma-rollup-preprocessor": "^7.0.0-rc.2",
+    "mocha": "^5.2.0",
+    "npm-run-all": "^4.1.5",
+    "nyc": "^13.1.0",
+    "opener": "^1.5.1",
+    "rimraf": "^2.6.3",
+    "rollup": "^1.1.1",
+    "rollup-plugin-babel": "^4.3.2",
+    "rollup-plugin-babel-minify": "^7.0.0",
+    "rollup-plugin-commonjs": "^9.2.0",
+    "rollup-plugin-json": "^3.1.0",
+    "rollup-plugin-node-resolve": "^4.0.0",
+    "rollup-watch": "^4.3.1",
+    "type-tester": "^1.0.0",
+    "typescript": "^3.2.4"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mysticatea/event-target-shim.git"
+  },
+  "keywords": [
+    "w3c",
+    "whatwg",
+    "eventtarget",
+    "event",
+    "events",
+    "shim"
+  ],
+  "author": "Toru Nagashima",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mysticatea/event-target-shim/issues"
+  },
+  "homepage": "https://github.com/mysticatea/event-target-shim"
+}
diff --git a/mqtt-backend/node_modules/events/.airtap.yml b/mqtt-backend/node_modules/events/.airtap.yml
new file mode 100644
index 0000000..c7a8a87
--- /dev/null
+++ b/mqtt-backend/node_modules/events/.airtap.yml
@@ -0,0 +1,15 @@
+sauce_connect: true
+loopback: airtap.local
+browsers:
+  - name: chrome
+    version: latest
+  - name: firefox
+    version: latest
+  - name: safari
+    version: 9..latest
+  - name: iphone
+    version: latest
+  - name: ie
+    version: 9..latest
+  - name: microsoftedge
+    version: 13..latest
diff --git a/mqtt-backend/node_modules/events/.github/FUNDING.yml b/mqtt-backend/node_modules/events/.github/FUNDING.yml
new file mode 100644
index 0000000..8b8cb78
--- /dev/null
+++ b/mqtt-backend/node_modules/events/.github/FUNDING.yml
@@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: npm/events
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
diff --git a/mqtt-backend/node_modules/events/.travis.yml b/mqtt-backend/node_modules/events/.travis.yml
new file mode 100644
index 0000000..486dc3c
--- /dev/null
+++ b/mqtt-backend/node_modules/events/.travis.yml
@@ -0,0 +1,18 @@
+dist: xenial
+os: linux
+language: node_js
+node_js:
+  - 'stable'
+  - 'lts/*'
+  - '0.12'
+script:
+  - npm test
+  - if [ "${TRAVIS_PULL_REQUEST}" = "false" ] && [ "${TRAVIS_NODE_VERSION}" = "stable" ]; then npm run test:browsers; fi
+addons:
+  sauce_connect: true
+  hosts:
+    - airtap.local
+env:
+  global:
+  - secure: XcBiD8yReflut9q7leKsigDZ0mI3qTKH+QrNVY8DaqlomJOZw8aOrVuX9Jz12l86ZJ41nbxmKnRNkFzcVr9mbP9YaeTb3DpeOBWmvaoSfud9Wnc16VfXtc1FCcwDhSVcSiM3UtnrmFU5cH+Dw1LPh5PbfylYOS/nJxUvG0FFLqI=
+  - secure: jNWtEbqhUdQ0xXDHvCYfUbKYeJCi6a7B4LsrcxYCyWWn4NIgncE5x2YbB+FSUUFVYfz0dsn5RKP1oHB99f0laUEo18HBNkrAS/rtyOdVzcpJjbQ6kgSILGjnJD/Ty1B57Rcz3iyev5Y7bLZ6Y1FbDnk/i9/l0faOGz8vTC3Vdkc=
diff --git a/mqtt-backend/node_modules/events/History.md b/mqtt-backend/node_modules/events/History.md
new file mode 100644
index 0000000..f48bf21
--- /dev/null
+++ b/mqtt-backend/node_modules/events/History.md
@@ -0,0 +1,118 @@
+# 3.3.0
+
+ - Support EventTarget emitters in `events.once` from Node.js 12.11.0.
+
+   Now you can use the `events.once` function with objects that implement the EventTarget interface. This interface is used widely in
+   the DOM and other web APIs.
+
+   ```js
+   var events = require('events');
+   var assert = require('assert');
+
+   async function connect() {
+     var ws = new WebSocket('wss://example.com');
+     await events.once(ws, 'open');
+     assert(ws.readyState === WebSocket.OPEN);
+   }
+
+   async function onClick() {
+     await events.once(document.body, 'click');
+     alert('you clicked the page!');
+   }
+   ```
+
+# 3.2.0
+
+ - Add `events.once` from Node.js 11.13.0.
+
+   To use this function, Promises must be supported in the environment. Use a polyfill like `es6-promise` if you support older browsers.
+
+# 3.1.0 (2020-01-08)
+
+`events` now matches the Node.js 11.12.0 API.
+
+  - pass through return value in wrapped `emitter.once()` listeners
+
+    Now, this works:
+    ```js
+    emitter.once('myevent', function () { return 1; });
+    var listener = emitter.rawListeners('myevent')[0]
+    assert(listener() === 1);
+    ```
+    Previously, `listener()` would return undefined regardless of the implementation.
+
+    Ported from https://github.com/nodejs/node/commit/acc506c2d2771dab8d7bba6d3452bc5180dff7cf
+
+  - Reduce code duplication in listener type check ([#67](https://github.com/Gozala/events/pull/67) by [@friederbluemle](https://github.com/friederbluemle)).
+  - Improve `emitter.once()` performance in some engines
+
+# 3.0.0 (2018-05-25)
+
+**This version drops support for IE8.** `events` no longer includes polyfills
+for ES5 features. If you need to support older environments, use an ES5 shim
+like [es5-shim](https://npmjs.com/package/es5-shim). Both the shim and sham
+versions of es5-shim are necessary.
+
+  - Update to events code from Node.js 10.x
+    - (semver major) Adds `off()` method
+  - Port more tests from Node.js
+  - Switch browser tests to airtap, making things more reliable
+
+# 2.1.0 (2018-05-25)
+
+  - add Emitter#rawListeners from Node.js v9.4
+
+# 2.0.0 (2018-02-02)
+
+  - Update to events code from node.js 8.x
+    - Adds `prependListener()` and `prependOnceListener()`
+    - Adds `eventNames()` method
+    - (semver major) Unwrap `once()` listeners in `listeners()`
+  - copy tests from node.js
+
+Note that this version doubles the gzipped size, jumping from 1.1KB to 2.1KB,
+due to new methods and runtime performance improvements. Be aware of that when
+upgrading.
+
+# 1.1.1 (2016-06-22)
+
+  - add more context to errors if they are not instanceof Error
+
+# 1.1.0 (2015-09-29)
+
+  - add Emitter#listerCount (to match node v4 api)
+
+# 1.0.2 (2014-08-28)
+
+  - remove un-reachable code
+  - update devDeps
+
+## 1.0.1 / 2014-05-11
+
+  - check for console.trace before using it
+
+## 1.0.0 / 2013-12-10
+
+  - Update to latest events code from node.js 0.10
+  - copy tests from node.js
+
+## 0.4.0 / 2011-07-03 ##
+
+  - Switching to graphquire@0.8.0
+
+## 0.3.0 / 2011-07-03 ##
+
+  - Switching to URL based module require.
+
+## 0.2.0 / 2011-06-10 ##
+
+  - Simplified package structure.
+  - Graphquire for dependency management.
+
+## 0.1.1 / 2011-05-16 ##
+
+  - Unhandled errors are logged via console.error
+
+## 0.1.0 / 2011-04-22 ##
+
+  - Initial release
diff --git a/mqtt-backend/node_modules/events/LICENSE b/mqtt-backend/node_modules/events/LICENSE
new file mode 100644
index 0000000..52ed3b0
--- /dev/null
+++ b/mqtt-backend/node_modules/events/LICENSE
@@ -0,0 +1,22 @@
+MIT
+
+Copyright Joyent, Inc. and other Node contributors.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to permit
+persons to whom the Software is furnished to do so, subject to the
+following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/events/Readme.md b/mqtt-backend/node_modules/events/Readme.md
new file mode 100644
index 0000000..80849c0
--- /dev/null
+++ b/mqtt-backend/node_modules/events/Readme.md
@@ -0,0 +1,50 @@
+# events [![Build Status](https://travis-ci.org/Gozala/events.png?branch=master)](https://travis-ci.org/Gozala/events)
+
+> Node's event emitter for all engines.
+
+This implements the Node.js [`events`][node.js docs] module for environments that do not have it, like browsers.
+
+> `events` currently matches the **Node.js 11.13.0** API.
+
+Note that the `events` module uses ES5 features. If you need to support very old browsers like IE8, use a shim like [`es5-shim`](https://www.npmjs.com/package/es5-shim). You need both the shim and the sham versions of `es5-shim`.
+
+This module is maintained, but only by very few people. If you'd like to help, let us know in the [Maintainer Needed](https://github.com/Gozala/events/issues/43) issue!
+
+## Install
+
+You usually do not have to install `events` yourself! If your code runs in Node.js, `events` is built in. If your code runs in the browser, bundlers like [browserify](https://github.com/browserify/browserify) or [webpack](https://github.com/webpack/webpack) also include the `events` module.
+
+But if none of those apply, with npm do:
+
+```
+npm install events
+```
+
+## Usage
+
+```javascript
+var EventEmitter = require('events')
+
+var ee = new EventEmitter()
+ee.on('message', function (text) {
+  console.log(text)
+})
+ee.emit('message', 'hello world')
+```
+
+## API
+
+See the [Node.js EventEmitter docs][node.js docs]. `events` currently matches the Node.js 11.13.0 API.
+
+## Contributing
+
+PRs are very welcome! The main way to contribute to `events` is by porting features, bugfixes and tests from Node.js. Ideally, code contributions to this module are copy-pasted from Node.js and transpiled to ES5, rather than reimplemented from scratch. Matching the Node.js code as closely as possible makes maintenance simpler when new changes land in Node.js.
+This module intends to provide exactly the same API as Node.js, so features that are not available in the core `events` module will not be accepted. Feature requests should instead be directed at [nodejs/node](https://github.com/nodejs/node) and will be added to this module once they are implemented in Node.js.
+
+If there is a difference in behaviour between Node.js's `events` module and this module, please open an issue!
+
+## License
+
+[MIT](./LICENSE)
+
+[node.js docs]: https://nodejs.org/dist/v11.13.0/docs/api/events.html
diff --git a/mqtt-backend/node_modules/events/events.js b/mqtt-backend/node_modules/events/events.js
new file mode 100644
index 0000000..34b69a0
--- /dev/null
+++ b/mqtt-backend/node_modules/events/events.js
@@ -0,0 +1,497 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+
+var R = typeof Reflect === 'object' ? Reflect : null
+var ReflectApply = R && typeof R.apply === 'function'
+  ? R.apply
+  : function ReflectApply(target, receiver, args) {
+    return Function.prototype.apply.call(target, receiver, args);
+  }
+
+var ReflectOwnKeys
+if (R && typeof R.ownKeys === 'function') {
+  ReflectOwnKeys = R.ownKeys
+} else if (Object.getOwnPropertySymbols) {
+  ReflectOwnKeys = function ReflectOwnKeys(target) {
+    return Object.getOwnPropertyNames(target)
+      .concat(Object.getOwnPropertySymbols(target));
+  };
+} else {
+  ReflectOwnKeys = function ReflectOwnKeys(target) {
+    return Object.getOwnPropertyNames(target);
+  };
+}
+
+function ProcessEmitWarning(warning) {
+  if (console && console.warn) console.warn(warning);
+}
+
+var NumberIsNaN = Number.isNaN || function NumberIsNaN(value) {
+  return value !== value;
+}
+
+function EventEmitter() {
+  EventEmitter.init.call(this);
+}
+module.exports = EventEmitter;
+module.exports.once = once;
+
+// Backwards-compat with node 0.10.x
+EventEmitter.EventEmitter = EventEmitter;
+
+EventEmitter.prototype._events = undefined;
+EventEmitter.prototype._eventsCount = 0;
+EventEmitter.prototype._maxListeners = undefined;
+
+// By default EventEmitters will print a warning if more than 10 listeners are
+// added to it. This is a useful default which helps finding memory leaks.
+var defaultMaxListeners = 10;
+
+function checkListener(listener) {
+  if (typeof listener !== 'function') {
+    throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
+  }
+}
+
+Object.defineProperty(EventEmitter, 'defaultMaxListeners', {
+  enumerable: true,
+  get: function() {
+    return defaultMaxListeners;
+  },
+  set: function(arg) {
+    if (typeof arg !== 'number' || arg < 0 || NumberIsNaN(arg)) {
+      throw new RangeError('The value of "defaultMaxListeners" is out of range. It must be a non-negative number. Received ' + arg + '.');
+    }
+    defaultMaxListeners = arg;
+  }
+});
+
+EventEmitter.init = function() {
+
+  if (this._events === undefined ||
+      this._events === Object.getPrototypeOf(this)._events) {
+    this._events = Object.create(null);
+    this._eventsCount = 0;
+  }
+
+  this._maxListeners = this._maxListeners || undefined;
+};
+
+// Obviously not all Emitters should be limited to 10. This function allows
+// that to be increased. Set to zero for unlimited.
+EventEmitter.prototype.setMaxListeners = function setMaxListeners(n) {
+  if (typeof n !== 'number' || n < 0 || NumberIsNaN(n)) {
+    throw new RangeError('The value of "n" is out of range. It must be a non-negative number. Received ' + n + '.');
+  }
+  this._maxListeners = n;
+  return this;
+};
+
+function _getMaxListeners(that) {
+  if (that._maxListeners === undefined)
+    return EventEmitter.defaultMaxListeners;
+  return that._maxListeners;
+}
+
+EventEmitter.prototype.getMaxListeners = function getMaxListeners() {
+  return _getMaxListeners(this);
+};
+
+EventEmitter.prototype.emit = function emit(type) {
+  var args = [];
+  for (var i = 1; i < arguments.length; i++) args.push(arguments[i]);
+  var doError = (type === 'error');
+
+  var events = this._events;
+  if (events !== undefined)
+    doError = (doError && events.error === undefined);
+  else if (!doError)
+    return false;
+
+  // If there is no 'error' event listener then throw.
+  if (doError) {
+    var er;
+    if (args.length > 0)
+      er = args[0];
+    if (er instanceof Error) {
+      // Note: The comments on the `throw` lines are intentional, they show
+      // up in Node's output if this results in an unhandled exception.
+      throw er; // Unhandled 'error' event
+    }
+    // At least give some kind of context to the user
+    var err = new Error('Unhandled error.' + (er ? ' (' + er.message + ')' : ''));
+    err.context = er;
+    throw err; // Unhandled 'error' event
+  }
+
+  var handler = events[type];
+
+  if (handler === undefined)
+    return false;
+
+  if (typeof handler === 'function') {
+    ReflectApply(handler, this, args);
+  } else {
+    var len = handler.length;
+    var listeners = arrayClone(handler, len);
+    for (var i = 0; i < len; ++i)
+      ReflectApply(listeners[i], this, args);
+  }
+
+  return true;
+};
+
+function _addListener(target, type, listener, prepend) {
+  var m;
+  var events;
+  var existing;
+
+  checkListener(listener);
+
+  events = target._events;
+  if (events === undefined) {
+    events = target._events = Object.create(null);
+    target._eventsCount = 0;
+  } else {
+    // To avoid recursion in the case that type === "newListener"! Before
+    // adding it to the listeners, first emit "newListener".
+    if (events.newListener !== undefined) {
+      target.emit('newListener', type,
+                  listener.listener ? listener.listener : listener);
+
+      // Re-assign `events` because a newListener handler could have caused the
+      // this._events to be assigned to a new object
+      events = target._events;
+    }
+    existing = events[type];
+  }
+
+  if (existing === undefined) {
+    // Optimize the case of one listener. Don't need the extra array object.
+    existing = events[type] = listener;
+    ++target._eventsCount;
+  } else {
+    if (typeof existing === 'function') {
+      // Adding the second element, need to change to array.
+      existing = events[type] =
+        prepend ? [listener, existing] : [existing, listener];
+      // If we've already got an array, just append.
+    } else if (prepend) {
+      existing.unshift(listener);
+    } else {
+      existing.push(listener);
+    }
+
+    // Check for listener leak
+    m = _getMaxListeners(target);
+    if (m > 0 && existing.length > m && !existing.warned) {
+      existing.warned = true;
+      // No error code for this since it is a Warning
+      // eslint-disable-next-line no-restricted-syntax
+      var w = new Error('Possible EventEmitter memory leak detected. ' +
+                          existing.length + ' ' + String(type) + ' listeners ' +
+                          'added. Use emitter.setMaxListeners() to ' +
+                          'increase limit');
+      w.name = 'MaxListenersExceededWarning';
+      w.emitter = target;
+      w.type = type;
+      w.count = existing.length;
+      ProcessEmitWarning(w);
+    }
+  }
+
+  return target;
+}
+
+EventEmitter.prototype.addListener = function addListener(type, listener) {
+  return _addListener(this, type, listener, false);
+};
+
+EventEmitter.prototype.on = EventEmitter.prototype.addListener;
+
+EventEmitter.prototype.prependListener =
+    function prependListener(type, listener) {
+      return _addListener(this, type, listener, true);
+    };
+
+function onceWrapper() {
+  if (!this.fired) {
+    this.target.removeListener(this.type, this.wrapFn);
+    this.fired = true;
+    if (arguments.length === 0)
+      return this.listener.call(this.target);
+    return this.listener.apply(this.target, arguments);
+  }
+}
+
+function _onceWrap(target, type, listener) {
+  var state = { fired: false, wrapFn: undefined, target: target, type: type, listener: listener };
+  var wrapped = onceWrapper.bind(state);
+  wrapped.listener = listener;
+  state.wrapFn = wrapped;
+  return wrapped;
+}
+
+EventEmitter.prototype.once = function once(type, listener) {
+  checkListener(listener);
+  this.on(type, _onceWrap(this, type, listener));
+  return this;
+};
+
+EventEmitter.prototype.prependOnceListener =
+    function prependOnceListener(type, listener) {
+      checkListener(listener);
+      this.prependListener(type, _onceWrap(this, type, listener));
+      return this;
+    };
+
+// Emits a 'removeListener' event if and only if the listener was removed.
+EventEmitter.prototype.removeListener =
+    function removeListener(type, listener) {
+      var list, events, position, i, originalListener;
+
+      checkListener(listener);
+
+      events = this._events;
+      if (events === undefined)
+        return this;
+
+      list = events[type];
+      if (list === undefined)
+        return this;
+
+      if (list === listener || list.listener === listener) {
+        if (--this._eventsCount === 0)
+          this._events = Object.create(null);
+        else {
+          delete events[type];
+          if (events.removeListener)
+            this.emit('removeListener', type, list.listener || listener);
+        }
+      } else if (typeof list !== 'function') {
+        position = -1;
+
+        for (i = list.length - 1; i >= 0; i--) {
+          if (list[i] === listener || list[i].listener === listener) {
+            originalListener = list[i].listener;
+            position = i;
+            break;
+          }
+        }
+
+        if (position < 0)
+          return this;
+
+        if (position === 0)
+          list.shift();
+        else {
+          spliceOne(list, position);
+        }
+
+        if (list.length === 1)
+          events[type] = list[0];
+
+        if (events.removeListener !== undefined)
+          this.emit('removeListener', type, originalListener || listener);
+      }
+
+      return this;
+    };
+
+EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
+
+EventEmitter.prototype.removeAllListeners =
+    function removeAllListeners(type) {
+      var listeners, events, i;
+
+      events = this._events;
+      if (events === undefined)
+        return this;
+
+      // not listening for removeListener, no need to emit
+      if (events.removeListener === undefined) {
+        if (arguments.length === 0) {
+          this._events = Object.create(null);
+          this._eventsCount = 0;
+        } else if (events[type] !== undefined) {
+          if (--this._eventsCount === 0)
+            this._events = Object.create(null);
+          else
+            delete events[type];
+        }
+        return this;
+      }
+
+      // emit removeListener for all listeners on all events
+      if (arguments.length === 0) {
+        var keys = Object.keys(events);
+        var key;
+        for (i = 0; i < keys.length; ++i) {
+          key = keys[i];
+          if (key === 'removeListener') continue;
+          this.removeAllListeners(key);
+        }
+        this.removeAllListeners('removeListener');
+        this._events = Object.create(null);
+        this._eventsCount = 0;
+        return this;
+      }
+
+      listeners = events[type];
+
+      if (typeof listeners === 'function') {
+        this.removeListener(type, listeners);
+      } else if (listeners !== undefined) {
+        // LIFO order
+        for (i = listeners.length - 1; i >= 0; i--) {
+          this.removeListener(type, listeners[i]);
+        }
+      }
+
+      return this;
+    };
+
+function _listeners(target, type, unwrap) {
+  var events = target._events;
+
+  if (events === undefined)
+    return [];
+
+  var evlistener = events[type];
+  if (evlistener === undefined)
+    return [];
+
+  if (typeof evlistener === 'function')
+    return unwrap ? [evlistener.listener || evlistener] : [evlistener];
+
+  return unwrap ?
+    unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
+}
+
+EventEmitter.prototype.listeners = function listeners(type) {
+  return _listeners(this, type, true);
+};
+
+EventEmitter.prototype.rawListeners = function rawListeners(type) {
+  return _listeners(this, type, false);
+};
+
+EventEmitter.listenerCount = function(emitter, type) {
+  if (typeof emitter.listenerCount === 'function') {
+    return emitter.listenerCount(type);
+  } else {
+    return listenerCount.call(emitter, type);
+  }
+};
+
+EventEmitter.prototype.listenerCount = listenerCount;
+function listenerCount(type) {
+  var events = this._events;
+
+  if (events !== undefined) {
+    var evlistener = events[type];
+
+    if (typeof evlistener === 'function') {
+      return 1;
+    } else if (evlistener !== undefined) {
+      return evlistener.length;
+    }
+  }
+
+  return 0;
+}
+
+EventEmitter.prototype.eventNames = function eventNames() {
+  return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];
+};
+
+function arrayClone(arr, n) {
+  var copy = new Array(n);
+  for (var i = 0; i < n; ++i)
+    copy[i] = arr[i];
+  return copy;
+}
+
+function spliceOne(list, index) {
+  for (; index + 1 < list.length; index++)
+    list[index] = list[index + 1];
+  list.pop();
+}
+
+function unwrapListeners(arr) {
+  var ret = new Array(arr.length);
+  for (var i = 0; i < ret.length; ++i) {
+    ret[i] = arr[i].listener || arr[i];
+  }
+  return ret;
+}
+
+function once(emitter, name) {
+  return new Promise(function (resolve, reject) {
+    function errorListener(err) {
+      emitter.removeListener(name, resolver);
+      reject(err);
+    }
+
+    function resolver() {
+      if (typeof emitter.removeListener === 'function') {
+        emitter.removeListener('error', errorListener);
+      }
+      resolve([].slice.call(arguments));
+    };
+
+    eventTargetAgnosticAddListener(emitter, name, resolver, { once: true });
+    if (name !== 'error') {
+      addErrorHandlerIfEventEmitter(emitter, errorListener, { once: true });
+    }
+  });
+}
+
+function addErrorHandlerIfEventEmitter(emitter, handler, flags) {
+  if (typeof emitter.on === 'function') {
+    eventTargetAgnosticAddListener(emitter, 'error', handler, flags);
+  }
+}
+
+function eventTargetAgnosticAddListener(emitter, name, listener, flags) {
+  if (typeof emitter.on === 'function') {
+    if (flags.once) {
+      emitter.once(name, listener);
+    } else {
+      emitter.on(name, listener);
+    }
+  } else if (typeof emitter.addEventListener === 'function') {
+    // EventTarget does not have `error` event semantics like Node
+    // EventEmitters, we do not listen for `error` events here.
+    emitter.addEventListener(name, function wrapListener(arg) {
+      // IE does not have builtin `{ once: true }` support so we
+      // have to do it manually.
+      if (flags.once) {
+        emitter.removeEventListener(name, wrapListener);
+      }
+      listener(arg);
+    });
+  } else {
+    throw new TypeError('The "emitter" argument must be of type EventEmitter. Received type ' + typeof emitter);
+  }
+}
diff --git a/mqtt-backend/node_modules/events/package.json b/mqtt-backend/node_modules/events/package.json
new file mode 100644
index 0000000..b9580d8
--- /dev/null
+++ b/mqtt-backend/node_modules/events/package.json
@@ -0,0 +1,37 @@
+{
+  "name": "events",
+  "version": "3.3.0",
+  "description": "Node's event emitter for all engines.",
+  "keywords": [
+    "events",
+    "eventEmitter",
+    "eventDispatcher",
+    "listeners"
+  ],
+  "author": "Irakli Gozalishvili <rfobic@gmail.com> (http://jeditoolkit.com)",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/Gozala/events.git",
+    "web": "https://github.com/Gozala/events"
+  },
+  "bugs": {
+    "url": "http://github.com/Gozala/events/issues/"
+  },
+  "main": "./events.js",
+  "engines": {
+    "node": ">=0.8.x"
+  },
+  "devDependencies": {
+    "airtap": "^1.0.0",
+    "functions-have-names": "^1.2.1",
+    "has": "^1.0.3",
+    "has-symbols": "^1.0.1",
+    "isarray": "^2.0.5",
+    "tape": "^5.0.0"
+  },
+  "scripts": {
+    "test": "node tests/index.js",
+    "test:browsers": "airtap -- tests/index.js"
+  },
+  "license": "MIT"
+}
diff --git a/mqtt-backend/node_modules/events/security.md b/mqtt-backend/node_modules/events/security.md
new file mode 100644
index 0000000..a14ace6
--- /dev/null
+++ b/mqtt-backend/node_modules/events/security.md
@@ -0,0 +1,10 @@
+# Security Policy
+
+## Supported Versions
+Only the latest major version is supported at any given time.
+
+## Reporting a Vulnerability
+
+To report a security vulnerability, please use the
+[Tidelift security contact](https://tidelift.com/security).
+Tidelift will coordinate the fix and disclosure.
diff --git a/mqtt-backend/node_modules/events/tests/add-listeners.js b/mqtt-backend/node_modules/events/tests/add-listeners.js
new file mode 100644
index 0000000..9b57827
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/add-listeners.js
@@ -0,0 +1,111 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('./common');
+var assert = require('assert');
+var EventEmitter = require('../');
+
+{
+  var ee = new EventEmitter();
+  var events_new_listener_emitted = [];
+  var listeners_new_listener_emitted = [];
+
+  // Sanity check
+  assert.strictEqual(ee.addListener, ee.on);
+
+  ee.on('newListener', function(event, listener) {
+    // Don't track newListener listeners.
+    if (event === 'newListener')
+      return;
+
+    events_new_listener_emitted.push(event);
+    listeners_new_listener_emitted.push(listener);
+  });
+
+  var hello = common.mustCall(function(a, b) {
+    assert.strictEqual('a', a);
+    assert.strictEqual('b', b);
+  });
+
+  ee.once('newListener', function(name, listener) {
+    assert.strictEqual(name, 'hello');
+    assert.strictEqual(listener, hello);
+
+    var listeners = this.listeners('hello');
+    assert.ok(Array.isArray(listeners));
+    assert.strictEqual(listeners.length, 0);
+  });
+
+  ee.on('hello', hello);
+  ee.once('foo', assert.fail);
+
+  assert.ok(Array.isArray(events_new_listener_emitted));
+  assert.strictEqual(events_new_listener_emitted.length, 2);
+  assert.strictEqual(events_new_listener_emitted[0], 'hello');
+  assert.strictEqual(events_new_listener_emitted[1], 'foo');
+
+  assert.ok(Array.isArray(listeners_new_listener_emitted));
+  assert.strictEqual(listeners_new_listener_emitted.length, 2);
+  assert.strictEqual(listeners_new_listener_emitted[0], hello);
+  assert.strictEqual(listeners_new_listener_emitted[1], assert.fail);
+
+  ee.emit('hello', 'a', 'b');
+}
+
+// just make sure that this doesn't throw:
+{
+  var f = new EventEmitter();
+
+  f.setMaxListeners(0);
+}
+
+{
+  var listen1 = function() {};
+  var listen2 = function() {};
+  var ee = new EventEmitter();
+
+  ee.once('newListener', function() {
+    var listeners = ee.listeners('hello');
+    assert.ok(Array.isArray(listeners));
+    assert.strictEqual(listeners.length, 0);
+    ee.once('newListener', function() {
+      var listeners = ee.listeners('hello');
+      assert.ok(Array.isArray(listeners));
+      assert.strictEqual(listeners.length, 0);
+    });
+    ee.on('hello', listen2);
+  });
+  ee.on('hello', listen1);
+  // The order of listeners on an event is not always the order in which the
+  // listeners were added.
+  var listeners = ee.listeners('hello');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 2);
+  assert.strictEqual(listeners[0], listen2);
+  assert.strictEqual(listeners[1], listen1);
+}
+
+// Verify that the listener must be a function
+assert.throws(function() {
+  var ee = new EventEmitter();
+
+  ee.on('foo', null);
+}, /^TypeError: The "listener" argument must be of type Function. Received type object$/);
diff --git a/mqtt-backend/node_modules/events/tests/check-listener-leaks.js b/mqtt-backend/node_modules/events/tests/check-listener-leaks.js
new file mode 100644
index 0000000..7fce48f
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/check-listener-leaks.js
@@ -0,0 +1,101 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('./common');
+var assert = require('assert');
+var events = require('../');
+
+// Redirect warning output to tape.
+var consoleWarn = console.warn;
+console.warn = common.test.comment;
+
+common.test.on('end', function () {
+  console.warn = consoleWarn;
+});
+
+// default
+{
+  var e = new events.EventEmitter();
+
+  for (var i = 0; i < 10; i++) {
+    e.on('default', common.mustNotCall());
+  }
+  assert.ok(!e._events['default'].hasOwnProperty('warned'));
+  e.on('default', common.mustNotCall());
+  assert.ok(e._events['default'].warned);
+
+  // specific
+  e.setMaxListeners(5);
+  for (var i = 0; i < 5; i++) {
+    e.on('specific', common.mustNotCall());
+  }
+  assert.ok(!e._events['specific'].hasOwnProperty('warned'));
+  e.on('specific', common.mustNotCall());
+  assert.ok(e._events['specific'].warned);
+
+  // only one
+  e.setMaxListeners(1);
+  e.on('only one', common.mustNotCall());
+  assert.ok(!e._events['only one'].hasOwnProperty('warned'));
+  e.on('only one', common.mustNotCall());
+  assert.ok(e._events['only one'].hasOwnProperty('warned'));
+
+  // unlimited
+  e.setMaxListeners(0);
+  for (var i = 0; i < 1000; i++) {
+    e.on('unlimited', common.mustNotCall());
+  }
+  assert.ok(!e._events['unlimited'].hasOwnProperty('warned'));
+}
+
+// process-wide
+{
+  events.EventEmitter.defaultMaxListeners = 42;
+  var e = new events.EventEmitter();
+
+  for (var i = 0; i < 42; ++i) {
+    e.on('fortytwo', common.mustNotCall());
+  }
+  assert.ok(!e._events['fortytwo'].hasOwnProperty('warned'));
+  e.on('fortytwo', common.mustNotCall());
+  assert.ok(e._events['fortytwo'].hasOwnProperty('warned'));
+  delete e._events['fortytwo'].warned;
+
+  events.EventEmitter.defaultMaxListeners = 44;
+  e.on('fortytwo', common.mustNotCall());
+  assert.ok(!e._events['fortytwo'].hasOwnProperty('warned'));
+  e.on('fortytwo', common.mustNotCall());
+  assert.ok(e._events['fortytwo'].hasOwnProperty('warned'));
+}
+
+// but _maxListeners still has precedence over defaultMaxListeners
+{
+  events.EventEmitter.defaultMaxListeners = 42;
+  var e = new events.EventEmitter();
+  e.setMaxListeners(1);
+  e.on('uno', common.mustNotCall());
+  assert.ok(!e._events['uno'].hasOwnProperty('warned'));
+  e.on('uno', common.mustNotCall());
+  assert.ok(e._events['uno'].hasOwnProperty('warned'));
+
+  // chainable
+  assert.strictEqual(e, e.setMaxListeners(1));
+}
diff --git a/mqtt-backend/node_modules/events/tests/common.js b/mqtt-backend/node_modules/events/tests/common.js
new file mode 100644
index 0000000..49569b0
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/common.js
@@ -0,0 +1,104 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var test = require('tape');
+var assert = require('assert');
+
+var noop = function() {};
+
+var mustCallChecks = [];
+
+function runCallChecks(exitCode) {
+  if (exitCode !== 0) return;
+
+  var failed = filter(mustCallChecks, function(context) {
+    if ('minimum' in context) {
+      context.messageSegment = 'at least ' + context.minimum;
+      return context.actual < context.minimum;
+    } else {
+      context.messageSegment = 'exactly ' + context.exact;
+      return context.actual !== context.exact;
+    }
+  });
+
+  for (var i = 0; i < failed.length; i++) {
+    var context = failed[i];
+    console.log('Mismatched %s function calls. Expected %s, actual %d.',
+        context.name,
+        context.messageSegment,
+        context.actual);
+    // IE8 has no .stack
+    if (context.stack) console.log(context.stack.split('\n').slice(2).join('\n'));
+  }
+
+  assert.strictEqual(failed.length, 0);
+}
+
+exports.mustCall = function(fn, exact) {
+  return _mustCallInner(fn, exact, 'exact');
+};
+
+function _mustCallInner(fn, criteria, field) {
+  if (typeof criteria == 'undefined') criteria = 1;
+
+  if (typeof fn === 'number') {
+    criteria = fn;
+    fn = noop;
+  } else if (fn === undefined) {
+    fn = noop;
+  }
+
+  if (typeof criteria !== 'number')
+    throw new TypeError('Invalid ' + field + ' value: ' + criteria);
+
+  var context = {
+    actual: 0,
+    stack: (new Error()).stack,
+    name: fn.name || '<anonymous>'
+  };
+
+  context[field] = criteria;
+
+  // add the exit listener only once to avoid listener leak warnings
+  if (mustCallChecks.length === 0) test.onFinish(function() { runCallChecks(0); });
+
+  mustCallChecks.push(context);
+
+  return function() {
+    context.actual++;
+    return fn.apply(this, arguments);
+  };
+}
+
+exports.mustNotCall = function(msg) {
+  return function mustNotCall() {
+    assert.fail(msg || 'function should not have been called');
+  };
+};
+
+function filter(arr, fn) {
+  if (arr.filter) return arr.filter(fn);
+  var filtered = [];
+  for (var i = 0; i < arr.length; i++) {
+    if (fn(arr[i], i, arr)) filtered.push(arr[i]);
+  }
+  return filtered
+}
diff --git a/mqtt-backend/node_modules/events/tests/errors.js b/mqtt-backend/node_modules/events/tests/errors.js
new file mode 100644
index 0000000..a23df43
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/errors.js
@@ -0,0 +1,13 @@
+'use strict';
+var assert = require('assert');
+var EventEmitter = require('../');
+
+var EE = new EventEmitter();
+
+assert.throws(function () {
+  EE.emit('error', 'Accepts a string');
+}, 'Error: Unhandled error. (Accepts a string)');
+
+assert.throws(function () {
+  EE.emit('error', { message: 'Error!' });
+}, 'Unhandled error. ([object Object])');
diff --git a/mqtt-backend/node_modules/events/tests/events-list.js b/mqtt-backend/node_modules/events/tests/events-list.js
new file mode 100644
index 0000000..08aa621
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/events-list.js
@@ -0,0 +1,28 @@
+'use strict';
+
+var EventEmitter = require('../');
+var assert = require('assert');
+
+var EE = new EventEmitter();
+var m = function() {};
+EE.on('foo', function() {});
+assert.equal(1, EE.eventNames().length);
+assert.equal('foo', EE.eventNames()[0]);
+EE.on('bar', m);
+assert.equal(2, EE.eventNames().length);
+assert.equal('foo', EE.eventNames()[0]);
+assert.equal('bar', EE.eventNames()[1]);
+EE.removeListener('bar', m);
+assert.equal(1, EE.eventNames().length);
+assert.equal('foo', EE.eventNames()[0]);
+
+if (typeof Symbol !== 'undefined') {
+  var s = Symbol('s');
+  EE.on(s, m);
+  assert.equal(2, EE.eventNames().length);
+  assert.equal('foo', EE.eventNames()[0]);
+  assert.equal(s, EE.eventNames()[1]);
+  EE.removeListener(s, m);
+  assert.equal(1, EE.eventNames().length);
+  assert.equal('foo', EE.eventNames()[0]);
+}
diff --git a/mqtt-backend/node_modules/events/tests/events-once.js b/mqtt-backend/node_modules/events/tests/events-once.js
new file mode 100644
index 0000000..dae8649
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/events-once.js
@@ -0,0 +1,234 @@
+'use strict';
+
+var common = require('./common');
+var EventEmitter = require('../').EventEmitter;
+var once = require('../').once;
+var has = require('has');
+var assert = require('assert');
+
+function Event(type) {
+  this.type = type;
+}
+
+function EventTargetMock() {
+  this.events = {};
+
+  this.addEventListener = common.mustCall(this.addEventListener);
+  this.removeEventListener = common.mustCall(this.removeEventListener);
+}
+
+EventTargetMock.prototype.addEventListener = function addEventListener(name, listener, options) {
+  if (!(name in this.events)) {
+    this.events[name] = { listeners: [], options: options || {} }
+  }
+  this.events[name].listeners.push(listener);
+};
+
+EventTargetMock.prototype.removeEventListener = function removeEventListener(name, callback) {
+  if (!(name in this.events)) {
+    return;
+  }
+  var event = this.events[name];
+  var stack = event.listeners;
+
+  for (var i = 0, l = stack.length; i < l; i++) {
+    if (stack[i] === callback) {
+      stack.splice(i, 1);
+      if (stack.length === 0) {
+        delete this.events[name];
+      }
+      return;
+    }
+  }
+};
+
+EventTargetMock.prototype.dispatchEvent = function dispatchEvent(arg) {
+  if (!(arg.type in this.events)) {
+    return true;
+  }
+
+  var event = this.events[arg.type];
+  var stack = event.listeners.slice();
+
+  for (var i = 0, l = stack.length; i < l; i++) {
+    stack[i].call(null, arg);
+    if (event.options.once) {
+      this.removeEventListener(arg.type, stack[i]);
+    }
+  }
+  return !arg.defaultPrevented;
+};
+
+function onceAnEvent() {
+  var ee = new EventEmitter();
+
+  process.nextTick(function () {
+    ee.emit('myevent', 42);
+  });
+
+  return once(ee, 'myevent').then(function (args) {
+    var value = args[0]
+    assert.strictEqual(value, 42);
+    assert.strictEqual(ee.listenerCount('error'), 0);
+    assert.strictEqual(ee.listenerCount('myevent'), 0);
+  });
+}
+
+function onceAnEventWithTwoArgs() {
+  var ee = new EventEmitter();
+
+  process.nextTick(function () {
+    ee.emit('myevent', 42, 24);
+  });
+
+  return once(ee, 'myevent').then(function (value) {
+    assert.strictEqual(value.length, 2);
+    assert.strictEqual(value[0], 42);
+    assert.strictEqual(value[1], 24);
+  });
+}
+
+function catchesErrors() {
+  var ee = new EventEmitter();
+
+  var expected = new Error('kaboom');
+  var err;
+  process.nextTick(function () {
+    ee.emit('error', expected);
+  });
+
+  return once(ee, 'myevent').then(function () {
+    throw new Error('should reject')
+  }, function (err) {
+    assert.strictEqual(err, expected);
+    assert.strictEqual(ee.listenerCount('error'), 0);
+    assert.strictEqual(ee.listenerCount('myevent'), 0);
+  });
+}
+
+function stopListeningAfterCatchingError() {
+  var ee = new EventEmitter();
+
+  var expected = new Error('kaboom');
+  var err;
+  process.nextTick(function () {
+    ee.emit('error', expected);
+    ee.emit('myevent', 42, 24);
+  });
+
+  // process.on('multipleResolves', common.mustNotCall());
+
+  return once(ee, 'myevent').then(common.mustNotCall, function (err) {
+    // process.removeAllListeners('multipleResolves');
+    assert.strictEqual(err, expected);
+    assert.strictEqual(ee.listenerCount('error'), 0);
+    assert.strictEqual(ee.listenerCount('myevent'), 0);
+  });
+}
+
+function onceError() {
+  var ee = new EventEmitter();
+
+  var expected = new Error('kaboom');
+  process.nextTick(function () {
+    ee.emit('error', expected);
+  });
+
+  var promise = once(ee, 'error');
+  assert.strictEqual(ee.listenerCount('error'), 1);
+  return promise.then(function (args) {
+    var err = args[0]
+    assert.strictEqual(err, expected);
+    assert.strictEqual(ee.listenerCount('error'), 0);
+    assert.strictEqual(ee.listenerCount('myevent'), 0);
+  });
+}
+
+function onceWithEventTarget() {
+  var et = new EventTargetMock();
+  var event = new Event('myevent');
+  process.nextTick(function () {
+    et.dispatchEvent(event);
+  });
+  return once(et, 'myevent').then(function (args) {
+    var value = args[0];
+    assert.strictEqual(value, event);
+    assert.strictEqual(has(et.events, 'myevent'), false);
+  });
+}
+
+function onceWithEventTargetError() {
+  var et = new EventTargetMock();
+  var error = new Event('error');
+  process.nextTick(function () {
+    et.dispatchEvent(error);
+  });
+  return once(et, 'error').then(function (args) {
+    var err = args[0];
+    assert.strictEqual(err, error);
+    assert.strictEqual(has(et.events, 'error'), false);
+  });
+}
+
+function prioritizesEventEmitter() {
+  var ee = new EventEmitter();
+  ee.addEventListener = assert.fail;
+  ee.removeAllListeners = assert.fail;
+  process.nextTick(function () {
+    ee.emit('foo');
+  });
+  return once(ee, 'foo');
+}
+
+var allTests = [
+  onceAnEvent(),
+  onceAnEventWithTwoArgs(),
+  catchesErrors(),
+  stopListeningAfterCatchingError(),
+  onceError(),
+  onceWithEventTarget(),
+  onceWithEventTargetError(),
+  prioritizesEventEmitter()
+];
+
+var hasBrowserEventTarget = false;
+try {
+  hasBrowserEventTarget = typeof (new window.EventTarget().addEventListener) === 'function' &&
+    new window.Event('xyz').type === 'xyz';
+} catch (err) {}
+
+if (hasBrowserEventTarget) {
+  var onceWithBrowserEventTarget = function onceWithBrowserEventTarget() {
+    var et = new window.EventTarget();
+    var event = new window.Event('myevent');
+    process.nextTick(function () {
+      et.dispatchEvent(event);
+    });
+    return once(et, 'myevent').then(function (args) {
+      var value = args[0];
+      assert.strictEqual(value, event);
+      assert.strictEqual(has(et.events, 'myevent'), false);
+    });
+  }
+
+  var onceWithBrowserEventTargetError = function onceWithBrowserEventTargetError() {
+    var et = new window.EventTarget();
+    var error = new window.Event('error');
+    process.nextTick(function () {
+      et.dispatchEvent(error);
+    });
+    return once(et, 'error').then(function (args) {
+      var err = args[0];
+      assert.strictEqual(err, error);
+      assert.strictEqual(has(et.events, 'error'), false);
+    });
+  }
+
+  common.test.comment('Testing with browser built-in EventTarget');
+  allTests.push([
+    onceWithBrowserEventTarget(),
+    onceWithBrowserEventTargetError()
+  ]);
+}
+
+module.exports = Promise.all(allTests);
diff --git a/mqtt-backend/node_modules/events/tests/index.js b/mqtt-backend/node_modules/events/tests/index.js
new file mode 100644
index 0000000..2d739e6
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/index.js
@@ -0,0 +1,64 @@
+var test = require('tape');
+var functionsHaveNames = require('functions-have-names');
+var hasSymbols = require('has-symbols');
+
+require('./legacy-compat');
+var common = require('./common');
+
+// we do this to easily wrap each file in a mocha test
+// and also have browserify be able to statically analyze this file
+var orig_require = require;
+var require = function(file) {
+    test(file, function(t) {
+        // Store the tape object so tests can access it.
+        t.on('end', function () { delete common.test; });
+        common.test = t;
+
+        try {
+          var exp = orig_require(file);
+          if (exp && exp.then) {
+            exp.then(function () { t.end(); }, t.fail);
+            return;
+          }
+        } catch (err) {
+          t.fail(err);
+        }
+        t.end();
+    });
+};
+
+require('./add-listeners.js');
+require('./check-listener-leaks.js');
+require('./errors.js');
+require('./events-list.js');
+if (typeof Promise === 'function') {
+  require('./events-once.js');
+} else {
+  // Promise support is not available.
+  test('./events-once.js', { skip: true }, function () {});
+}
+require('./listener-count.js');
+require('./listeners-side-effects.js');
+require('./listeners.js');
+require('./max-listeners.js');
+if (functionsHaveNames()) {
+  require('./method-names.js');
+} else {
+  // Function.name is not supported in IE
+  test('./method-names.js', { skip: true }, function () {});
+}
+require('./modify-in-emit.js');
+require('./num-args.js');
+require('./once.js');
+require('./prepend.js');
+require('./set-max-listeners-side-effects.js');
+require('./special-event-names.js');
+require('./subclass.js');
+if (hasSymbols()) {
+  require('./symbols.js');
+} else {
+  // Symbol is not available.
+  test('./symbols.js', { skip: true }, function () {});
+}
+require('./remove-all-listeners.js');
+require('./remove-listeners.js');
diff --git a/mqtt-backend/node_modules/events/tests/legacy-compat.js b/mqtt-backend/node_modules/events/tests/legacy-compat.js
new file mode 100644
index 0000000..a402be6
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/legacy-compat.js
@@ -0,0 +1,16 @@
+// sigh... life is hard
+if (!global.console) {
+    console = {}
+}
+
+var fns = ['log', 'error', 'trace'];
+for (var i=0 ; i<fns.length ; ++i) {
+    var fn = fns[i];
+    if (!console[fn]) {
+        console[fn] = function() {};
+    }
+}
+
+if (!Array.isArray) {
+    Array.isArray = require('isarray');
+}
diff --git a/mqtt-backend/node_modules/events/tests/listener-count.js b/mqtt-backend/node_modules/events/tests/listener-count.js
new file mode 100644
index 0000000..9d422d8
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/listener-count.js
@@ -0,0 +1,37 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+require('./common');
+var assert = require('assert');
+var EventEmitter = require('../');
+
+var emitter = new EventEmitter();
+emitter.on('foo', function() {});
+emitter.on('foo', function() {});
+emitter.on('baz', function() {});
+// Allow any type
+emitter.on(123, function() {});
+
+assert.strictEqual(EventEmitter.listenerCount(emitter, 'foo'), 2);
+assert.strictEqual(emitter.listenerCount('foo'), 2);
+assert.strictEqual(emitter.listenerCount('bar'), 0);
+assert.strictEqual(emitter.listenerCount('baz'), 1);
+assert.strictEqual(emitter.listenerCount(123), 1);
diff --git a/mqtt-backend/node_modules/events/tests/listeners-side-effects.js b/mqtt-backend/node_modules/events/tests/listeners-side-effects.js
new file mode 100644
index 0000000..180f833
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/listeners-side-effects.js
@@ -0,0 +1,56 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+require('./common');
+var assert = require('assert');
+
+var EventEmitter = require('../').EventEmitter;
+
+var e = new EventEmitter();
+var fl;  // foo listeners
+
+fl = e.listeners('foo');
+assert.ok(Array.isArray(fl));
+assert.strictEqual(fl.length, 0);
+if (Object.create) assert.ok(!(e._events instanceof Object));
+assert.strictEqual(Object.keys(e._events).length, 0);
+
+e.on('foo', assert.fail);
+fl = e.listeners('foo');
+assert.strictEqual(e._events.foo, assert.fail);
+assert.ok(Array.isArray(fl));
+assert.strictEqual(fl.length, 1);
+assert.strictEqual(fl[0], assert.fail);
+
+e.listeners('bar');
+
+e.on('foo', assert.ok);
+fl = e.listeners('foo');
+
+assert.ok(Array.isArray(e._events.foo));
+assert.strictEqual(e._events.foo.length, 2);
+assert.strictEqual(e._events.foo[0], assert.fail);
+assert.strictEqual(e._events.foo[1], assert.ok);
+
+assert.ok(Array.isArray(fl));
+assert.strictEqual(fl.length, 2);
+assert.strictEqual(fl[0], assert.fail);
+assert.strictEqual(fl[1], assert.ok);
diff --git a/mqtt-backend/node_modules/events/tests/listeners.js b/mqtt-backend/node_modules/events/tests/listeners.js
new file mode 100644
index 0000000..1909d2d
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/listeners.js
@@ -0,0 +1,168 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+require('./common');
+var assert = require('assert');
+var events = require('../');
+var util = require('util');
+
+function listener() {}
+function listener2() {}
+function listener3() {
+  return 0;
+}
+function listener4() {
+  return 1;
+}
+
+function TestStream() {}
+util.inherits(TestStream, events.EventEmitter);
+
+{
+  var ee = new events.EventEmitter();
+  ee.on('foo', listener);
+  var fooListeners = ee.listeners('foo');
+
+  var listeners = ee.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 1);
+  assert.strictEqual(listeners[0], listener);
+
+  ee.removeAllListeners('foo');
+  listeners = ee.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 0);
+
+  assert.ok(Array.isArray(fooListeners));
+  assert.strictEqual(fooListeners.length, 1);
+  assert.strictEqual(fooListeners[0], listener);
+}
+
+{
+  var ee = new events.EventEmitter();
+  ee.on('foo', listener);
+
+  var eeListenersCopy = ee.listeners('foo');
+  assert.ok(Array.isArray(eeListenersCopy));
+  assert.strictEqual(eeListenersCopy.length, 1);
+  assert.strictEqual(eeListenersCopy[0], listener);
+
+  var listeners = ee.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 1);
+  assert.strictEqual(listeners[0], listener);
+
+  eeListenersCopy.push(listener2);
+  listeners = ee.listeners('foo');
+  
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 1);
+  assert.strictEqual(listeners[0], listener);
+
+  assert.strictEqual(eeListenersCopy.length, 2);
+  assert.strictEqual(eeListenersCopy[0], listener);
+  assert.strictEqual(eeListenersCopy[1], listener2);
+}
+
+{
+  var ee = new events.EventEmitter();
+  ee.on('foo', listener);
+  var eeListenersCopy = ee.listeners('foo');
+  ee.on('foo', listener2);
+
+  var listeners = ee.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 2);
+  assert.strictEqual(listeners[0], listener);
+  assert.strictEqual(listeners[1], listener2);
+
+  assert.ok(Array.isArray(eeListenersCopy));
+  assert.strictEqual(eeListenersCopy.length, 1);
+  assert.strictEqual(eeListenersCopy[0], listener);
+}
+
+{
+  var ee = new events.EventEmitter();
+  ee.once('foo', listener);
+  var listeners = ee.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 1);
+  assert.strictEqual(listeners[0], listener);
+}
+
+{
+  var ee = new events.EventEmitter();
+  ee.on('foo', listener);
+  ee.once('foo', listener2);
+
+  var listeners = ee.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 2);
+  assert.strictEqual(listeners[0], listener);
+  assert.strictEqual(listeners[1], listener2);
+}
+
+{
+  var ee = new events.EventEmitter();
+  ee._events = undefined;
+  var listeners = ee.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 0);
+}
+
+{
+  var s = new TestStream();
+  var listeners = s.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 0);
+}
+
+
+{
+  var ee = new events.EventEmitter();
+  ee.on('foo', listener);
+  var wrappedListener = ee.rawListeners('foo');
+  assert.strictEqual(wrappedListener.length, 1);
+  assert.strictEqual(wrappedListener[0], listener);
+  assert.notStrictEqual(wrappedListener, ee.rawListeners('foo'));
+  ee.once('foo', listener);
+  var wrappedListeners = ee.rawListeners('foo');
+  assert.strictEqual(wrappedListeners.length, 2);
+  assert.strictEqual(wrappedListeners[0], listener);
+  assert.notStrictEqual(wrappedListeners[1], listener);
+  assert.strictEqual(wrappedListeners[1].listener, listener);
+  assert.notStrictEqual(wrappedListeners, ee.rawListeners('foo'));
+  ee.emit('foo');
+  assert.strictEqual(wrappedListeners.length, 2);
+  assert.strictEqual(wrappedListeners[1].listener, listener);
+}
+
+{
+  var ee = new events.EventEmitter();
+  ee.once('foo', listener3);
+  ee.on('foo', listener4);
+  var rawListeners = ee.rawListeners('foo');
+  assert.strictEqual(rawListeners.length, 2);
+  assert.strictEqual(rawListeners[0](), 0);
+  var rawListener = ee.rawListeners('foo');
+  assert.strictEqual(rawListener.length, 1);
+  assert.strictEqual(rawListener[0](), 1);
+}
diff --git a/mqtt-backend/node_modules/events/tests/max-listeners.js b/mqtt-backend/node_modules/events/tests/max-listeners.js
new file mode 100644
index 0000000..0b43953
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/max-listeners.js
@@ -0,0 +1,47 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('./common');
+var assert = require('assert');
+var events = require('../');
+var e = new events.EventEmitter();
+
+var hasDefineProperty = !!Object.defineProperty;
+try { Object.defineProperty({}, 'x', { value: 0 }); } catch (err) { hasDefineProperty = false }
+
+e.on('maxListeners', common.mustCall());
+
+// Should not corrupt the 'maxListeners' queue.
+e.setMaxListeners(42);
+
+var throwsObjs = [NaN, -1, 'and even this'];
+var maxError = /^RangeError: The value of "n" is out of range\. It must be a non-negative number\./;
+var defError = /^RangeError: The value of "defaultMaxListeners" is out of range\. It must be a non-negative number\./;
+
+for (var i = 0; i < throwsObjs.length; i++) {
+  var obj = throwsObjs[i];
+  assert.throws(function() { e.setMaxListeners(obj); }, maxError);
+  if (hasDefineProperty) {
+    assert.throws(function() { events.defaultMaxListeners = obj; }, defError);
+  }
+}
+
+e.emit('maxListeners');
diff --git a/mqtt-backend/node_modules/events/tests/method-names.js b/mqtt-backend/node_modules/events/tests/method-names.js
new file mode 100644
index 0000000..364a161
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/method-names.js
@@ -0,0 +1,35 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+require('./common');
+var assert = require('assert');
+var events = require('../');
+
+var E = events.EventEmitter.prototype;
+assert.strictEqual(E.constructor.name, 'EventEmitter');
+assert.strictEqual(E.on, E.addListener);  // Same method.
+assert.strictEqual(E.off, E.removeListener);  // Same method.
+Object.getOwnPropertyNames(E).forEach(function(name) {
+  if (name === 'constructor' || name === 'on' || name === 'off') return;
+  if (typeof E[name] !== 'function') return;
+  assert.strictEqual(E[name].name, name);
+});
diff --git a/mqtt-backend/node_modules/events/tests/modify-in-emit.js b/mqtt-backend/node_modules/events/tests/modify-in-emit.js
new file mode 100644
index 0000000..53fa633
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/modify-in-emit.js
@@ -0,0 +1,90 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+require('./common');
+var assert = require('assert');
+var events = require('../');
+
+var callbacks_called = [];
+
+var e = new events.EventEmitter();
+
+function callback1() {
+  callbacks_called.push('callback1');
+  e.on('foo', callback2);
+  e.on('foo', callback3);
+  e.removeListener('foo', callback1);
+}
+
+function callback2() {
+  callbacks_called.push('callback2');
+  e.removeListener('foo', callback2);
+}
+
+function callback3() {
+  callbacks_called.push('callback3');
+  e.removeListener('foo', callback3);
+}
+
+e.on('foo', callback1);
+assert.strictEqual(e.listeners('foo').length, 1);
+
+e.emit('foo');
+assert.strictEqual(e.listeners('foo').length, 2);
+assert.ok(Array.isArray(callbacks_called));
+assert.strictEqual(callbacks_called.length, 1);
+assert.strictEqual(callbacks_called[0], 'callback1');
+
+e.emit('foo');
+assert.strictEqual(e.listeners('foo').length, 0);
+assert.ok(Array.isArray(callbacks_called));
+assert.strictEqual(callbacks_called.length, 3);
+assert.strictEqual(callbacks_called[0], 'callback1');
+assert.strictEqual(callbacks_called[1], 'callback2');
+assert.strictEqual(callbacks_called[2], 'callback3');
+
+e.emit('foo');
+assert.strictEqual(e.listeners('foo').length, 0);
+assert.ok(Array.isArray(callbacks_called));
+assert.strictEqual(callbacks_called.length, 3);
+assert.strictEqual(callbacks_called[0], 'callback1');
+assert.strictEqual(callbacks_called[1], 'callback2');
+assert.strictEqual(callbacks_called[2], 'callback3');
+
+e.on('foo', callback1);
+e.on('foo', callback2);
+assert.strictEqual(e.listeners('foo').length, 2);
+e.removeAllListeners('foo');
+assert.strictEqual(e.listeners('foo').length, 0);
+
+// Verify that removing callbacks while in emit allows emits to propagate to
+// all listeners
+callbacks_called = [];
+
+e.on('foo', callback2);
+e.on('foo', callback3);
+assert.strictEqual(2, e.listeners('foo').length);
+e.emit('foo');
+assert.ok(Array.isArray(callbacks_called));
+assert.strictEqual(callbacks_called.length, 2);
+assert.strictEqual(callbacks_called[0], 'callback2');
+assert.strictEqual(callbacks_called[1], 'callback3');
+assert.strictEqual(0, e.listeners('foo').length);
diff --git a/mqtt-backend/node_modules/events/tests/num-args.js b/mqtt-backend/node_modules/events/tests/num-args.js
new file mode 100644
index 0000000..c9b0deb
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/num-args.js
@@ -0,0 +1,60 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+require('./common');
+var assert = require('assert');
+var events = require('../');
+
+var e = new events.EventEmitter();
+var num_args_emitted = [];
+
+e.on('numArgs', function() {
+  var numArgs = arguments.length;
+  num_args_emitted.push(numArgs);
+});
+
+e.on('foo', function() {
+  num_args_emitted.push(arguments.length);
+});
+
+e.on('foo', function() {
+  num_args_emitted.push(arguments.length);
+});
+
+e.emit('numArgs');
+e.emit('numArgs', null);
+e.emit('numArgs', null, null);
+e.emit('numArgs', null, null, null);
+e.emit('numArgs', null, null, null, null);
+e.emit('numArgs', null, null, null, null, null);
+
+e.emit('foo', null, null, null, null);
+
+assert.ok(Array.isArray(num_args_emitted));
+assert.strictEqual(num_args_emitted.length, 8);
+assert.strictEqual(num_args_emitted[0], 0);
+assert.strictEqual(num_args_emitted[1], 1);
+assert.strictEqual(num_args_emitted[2], 2);
+assert.strictEqual(num_args_emitted[3], 3);
+assert.strictEqual(num_args_emitted[4], 4);
+assert.strictEqual(num_args_emitted[5], 5);
+assert.strictEqual(num_args_emitted[6], 4);
+assert.strictEqual(num_args_emitted[6], 4);
diff --git a/mqtt-backend/node_modules/events/tests/once.js b/mqtt-backend/node_modules/events/tests/once.js
new file mode 100644
index 0000000..4b36c05
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/once.js
@@ -0,0 +1,83 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('./common');
+var assert = require('assert');
+var EventEmitter = require('../');
+
+var e = new EventEmitter();
+
+e.once('hello', common.mustCall());
+
+e.emit('hello', 'a', 'b');
+e.emit('hello', 'a', 'b');
+e.emit('hello', 'a', 'b');
+e.emit('hello', 'a', 'b');
+
+function remove() {
+  assert.fail('once->foo should not be emitted');
+}
+
+e.once('foo', remove);
+e.removeListener('foo', remove);
+e.emit('foo');
+
+e.once('e', common.mustCall(function() {
+  e.emit('e');
+}));
+
+e.once('e', common.mustCall());
+
+e.emit('e');
+
+// Verify that the listener must be a function
+assert.throws(function() {
+  var ee = new EventEmitter();
+
+  ee.once('foo', null);
+}, /^TypeError: The "listener" argument must be of type Function. Received type object$/);
+
+{
+  // once() has different code paths based on the number of arguments being
+  // emitted. Verify that all of the cases are covered.
+  var maxArgs = 4;
+
+  for (var i = 0; i <= maxArgs; ++i) {
+    var ee = new EventEmitter();
+    var args = ['foo'];
+
+    for (var j = 0; j < i; ++j)
+      args.push(j);
+
+    ee.once('foo', common.mustCall(function() {
+      var params = Array.prototype.slice.call(arguments);
+      var restArgs = args.slice(1);
+      assert.ok(Array.isArray(params));
+      assert.strictEqual(params.length, restArgs.length);
+      for (var index = 0; index < params.length; index++) {
+        var param = params[index];
+        assert.strictEqual(param, restArgs[index]);
+      }
+  	}));
+
+    EventEmitter.prototype.emit.apply(ee, args);
+  }
+}
diff --git a/mqtt-backend/node_modules/events/tests/prepend.js b/mqtt-backend/node_modules/events/tests/prepend.js
new file mode 100644
index 0000000..79afde0
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/prepend.js
@@ -0,0 +1,31 @@
+'use strict';
+
+var common = require('./common');
+var EventEmitter = require('../');
+var assert = require('assert');
+
+var myEE = new EventEmitter();
+var m = 0;
+// This one comes last.
+myEE.on('foo', common.mustCall(function () {
+  assert.strictEqual(m, 2);
+}));
+
+// This one comes second.
+myEE.prependListener('foo', common.mustCall(function () {
+  assert.strictEqual(m++, 1);
+}));
+
+// This one comes first.
+myEE.prependOnceListener('foo',
+                         common.mustCall(function () {
+                           assert.strictEqual(m++, 0);
+                         }));
+
+myEE.emit('foo');
+
+// Verify that the listener must be a function
+assert.throws(function () {
+  var ee = new EventEmitter();
+  ee.prependOnceListener('foo', null);
+}, 'TypeError: The "listener" argument must be of type Function. Received type object');
diff --git a/mqtt-backend/node_modules/events/tests/remove-all-listeners.js b/mqtt-backend/node_modules/events/tests/remove-all-listeners.js
new file mode 100644
index 0000000..622941c
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/remove-all-listeners.js
@@ -0,0 +1,133 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('./common');
+var assert = require('assert');
+var events = require('../');
+var test = require('tape');
+
+function expect(expected) {
+  var actual = [];
+  test.onFinish(function() {
+    var sortedActual = actual.sort();
+    var sortedExpected = expected.sort();
+    assert.strictEqual(sortedActual.length, sortedExpected.length);
+    for (var index = 0; index < sortedActual.length; index++) {
+      var value = sortedActual[index];
+      assert.strictEqual(value, sortedExpected[index]);
+    }
+  });
+  function listener(name) {
+    actual.push(name);
+  }
+  return common.mustCall(listener, expected.length);
+}
+
+{
+  var ee = new events.EventEmitter();
+  var noop = common.mustNotCall();
+  ee.on('foo', noop);
+  ee.on('bar', noop);
+  ee.on('baz', noop);
+  ee.on('baz', noop);
+  var fooListeners = ee.listeners('foo');
+  var barListeners = ee.listeners('bar');
+  var bazListeners = ee.listeners('baz');
+  ee.on('removeListener', expect(['bar', 'baz', 'baz']));
+  ee.removeAllListeners('bar');
+  ee.removeAllListeners('baz');
+
+  var listeners = ee.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 1);
+  assert.strictEqual(listeners[0], noop);
+
+  listeners = ee.listeners('bar');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 0);
+  listeners = ee.listeners('baz');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 0);
+  // After calling removeAllListeners(),
+  // the old listeners array should stay unchanged.
+  assert.strictEqual(fooListeners.length, 1);
+  assert.strictEqual(fooListeners[0], noop);
+  assert.strictEqual(barListeners.length, 1);
+  assert.strictEqual(barListeners[0], noop);
+  assert.strictEqual(bazListeners.length, 2);
+  assert.strictEqual(bazListeners[0], noop);
+  assert.strictEqual(bazListeners[1], noop);
+  // After calling removeAllListeners(),
+  // new listeners arrays is different from the old.
+  assert.notStrictEqual(ee.listeners('bar'), barListeners);
+  assert.notStrictEqual(ee.listeners('baz'), bazListeners);
+}
+
+{
+  var ee = new events.EventEmitter();
+  ee.on('foo', common.mustNotCall());
+  ee.on('bar', common.mustNotCall());
+  // Expect LIFO order
+  ee.on('removeListener', expect(['foo', 'bar', 'removeListener']));
+  ee.on('removeListener', expect(['foo', 'bar']));
+  ee.removeAllListeners();
+
+  var listeners = ee.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 0);
+  listeners = ee.listeners('bar');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 0);
+}
+
+{
+  var ee = new events.EventEmitter();
+  ee.on('removeListener', common.mustNotCall());
+  // Check for regression where removeAllListeners() throws when
+  // there exists a 'removeListener' listener, but there exists
+  // no listeners for the provided event type.
+  assert.doesNotThrow(function () { ee.removeAllListeners(ee, 'foo') });
+}
+
+{
+  var ee = new events.EventEmitter();
+  var expectLength = 2;
+  ee.on('removeListener', function() {
+    assert.strictEqual(expectLength--, this.listeners('baz').length);
+  });
+  ee.on('baz', common.mustNotCall());
+  ee.on('baz', common.mustNotCall());
+  ee.on('baz', common.mustNotCall());
+  assert.strictEqual(ee.listeners('baz').length, expectLength + 1);
+  ee.removeAllListeners('baz');
+  assert.strictEqual(ee.listeners('baz').length, 0);
+}
+
+{
+  var ee = new events.EventEmitter();
+  assert.strictEqual(ee, ee.removeAllListeners());
+}
+
+{
+  var ee = new events.EventEmitter();
+  ee._events = undefined;
+  assert.strictEqual(ee, ee.removeAllListeners());
+}
diff --git a/mqtt-backend/node_modules/events/tests/remove-listeners.js b/mqtt-backend/node_modules/events/tests/remove-listeners.js
new file mode 100644
index 0000000..18e4d16
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/remove-listeners.js
@@ -0,0 +1,212 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('./common');
+var assert = require('assert');
+var EventEmitter = require('../');
+
+var listener1 = function listener1() {};
+var listener2 = function listener2() {};
+
+{
+  var ee = new EventEmitter();
+  ee.on('hello', listener1);
+  ee.on('removeListener', common.mustCall(function(name, cb) {
+    assert.strictEqual(name, 'hello');
+    assert.strictEqual(cb, listener1);
+  }));
+  ee.removeListener('hello', listener1);
+  var listeners = ee.listeners('hello');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 0);
+}
+
+{
+  var ee = new EventEmitter();
+  ee.on('hello', listener1);
+  ee.on('removeListener', common.mustNotCall());
+  ee.removeListener('hello', listener2);
+
+  var listeners = ee.listeners('hello');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 1);
+  assert.strictEqual(listeners[0], listener1);
+}
+
+{
+  var ee = new EventEmitter();
+  ee.on('hello', listener1);
+  ee.on('hello', listener2);
+
+  var listeners;
+  ee.once('removeListener', common.mustCall(function(name, cb) {
+    assert.strictEqual(name, 'hello');
+    assert.strictEqual(cb, listener1);
+    listeners = ee.listeners('hello');
+    assert.ok(Array.isArray(listeners));
+    assert.strictEqual(listeners.length, 1);
+    assert.strictEqual(listeners[0], listener2);
+  }));
+  ee.removeListener('hello', listener1);
+  listeners = ee.listeners('hello');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 1);
+  assert.strictEqual(listeners[0], listener2);
+  ee.once('removeListener', common.mustCall(function(name, cb) {
+    assert.strictEqual(name, 'hello');
+    assert.strictEqual(cb, listener2);
+    listeners = ee.listeners('hello');
+    assert.ok(Array.isArray(listeners));
+    assert.strictEqual(listeners.length, 0);
+  }));
+  ee.removeListener('hello', listener2);
+  listeners = ee.listeners('hello');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 0);
+}
+
+{
+  var ee = new EventEmitter();
+
+  function remove1() {
+    assert.fail('remove1 should not have been called');
+  }
+
+  function remove2() {
+    assert.fail('remove2 should not have been called');
+  }
+
+  ee.on('removeListener', common.mustCall(function(name, cb) {
+    if (cb !== remove1) return;
+    this.removeListener('quux', remove2);
+    this.emit('quux');
+  }, 2));
+  ee.on('quux', remove1);
+  ee.on('quux', remove2);
+  ee.removeListener('quux', remove1);
+}
+
+{
+  var ee = new EventEmitter();
+  ee.on('hello', listener1);
+  ee.on('hello', listener2);
+
+  var listeners;
+  ee.once('removeListener', common.mustCall(function(name, cb) {
+    assert.strictEqual(name, 'hello');
+    assert.strictEqual(cb, listener1);
+    listeners = ee.listeners('hello');
+    assert.ok(Array.isArray(listeners));
+    assert.strictEqual(listeners.length, 1);
+    assert.strictEqual(listeners[0], listener2);
+    ee.once('removeListener', common.mustCall(function(name, cb) {
+      assert.strictEqual(name, 'hello');
+      assert.strictEqual(cb, listener2);
+      listeners = ee.listeners('hello');
+      assert.ok(Array.isArray(listeners));
+      assert.strictEqual(listeners.length, 0);
+    }));
+    ee.removeListener('hello', listener2);
+    listeners = ee.listeners('hello');
+    assert.ok(Array.isArray(listeners));
+    assert.strictEqual(listeners.length, 0);
+  }));
+  ee.removeListener('hello', listener1);
+  listeners = ee.listeners('hello');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 0);
+}
+
+{
+  var ee = new EventEmitter();
+  var listener3 = common.mustCall(function() {
+    ee.removeListener('hello', listener4);
+  }, 2);
+  var listener4 = common.mustCall();
+
+  ee.on('hello', listener3);
+  ee.on('hello', listener4);
+
+  // listener4 will still be called although it is removed by listener 3.
+  ee.emit('hello');
+  // This is so because the interal listener array at time of emit
+  // was [listener3,listener4]
+
+  // Interal listener array [listener3]
+  ee.emit('hello');
+}
+
+{
+  var ee = new EventEmitter();
+
+  ee.once('hello', listener1);
+  ee.on('removeListener', common.mustCall(function(eventName, listener) {
+    assert.strictEqual(eventName, 'hello');
+    assert.strictEqual(listener, listener1);
+  }));
+  ee.emit('hello');
+}
+
+{
+  var ee = new EventEmitter();
+
+  assert.strictEqual(ee, ee.removeListener('foo', function() {}));
+}
+
+// Verify that the removed listener must be a function
+assert.throws(function() {
+  var ee = new EventEmitter();
+
+  ee.removeListener('foo', null);
+}, /^TypeError: The "listener" argument must be of type Function\. Received type object$/);
+
+{
+  var ee = new EventEmitter();
+  var listener = function() {};
+  ee._events = undefined;
+  var e = ee.removeListener('foo', listener);
+  assert.strictEqual(e, ee);
+}
+
+{
+  var ee = new EventEmitter();
+
+  ee.on('foo', listener1);
+  ee.on('foo', listener2);
+  var listeners = ee.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 2);
+  assert.strictEqual(listeners[0], listener1);
+  assert.strictEqual(listeners[1], listener2);
+
+  ee.removeListener('foo', listener1);
+  assert.strictEqual(ee._events.foo, listener2);
+
+  ee.on('foo', listener1);
+  listeners = ee.listeners('foo');
+  assert.ok(Array.isArray(listeners));
+  assert.strictEqual(listeners.length, 2);
+  assert.strictEqual(listeners[0], listener2);
+  assert.strictEqual(listeners[1], listener1);
+
+  ee.removeListener('foo', listener1);
+  assert.strictEqual(ee._events.foo, listener2);
+}
diff --git a/mqtt-backend/node_modules/events/tests/set-max-listeners-side-effects.js b/mqtt-backend/node_modules/events/tests/set-max-listeners-side-effects.js
new file mode 100644
index 0000000..13dbb67
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/set-max-listeners-side-effects.js
@@ -0,0 +1,31 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+require('./common');
+var assert = require('assert');
+var events = require('../');
+
+var e = new events.EventEmitter();
+
+if (Object.create) assert.ok(!(e._events instanceof Object));
+assert.strictEqual(Object.keys(e._events).length, 0);
+e.setMaxListeners(5);
+assert.strictEqual(Object.keys(e._events).length, 0);
diff --git a/mqtt-backend/node_modules/events/tests/special-event-names.js b/mqtt-backend/node_modules/events/tests/special-event-names.js
new file mode 100644
index 0000000..a2f0b74
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/special-event-names.js
@@ -0,0 +1,45 @@
+'use strict';
+
+var common = require('./common');
+var EventEmitter = require('../');
+var assert = require('assert');
+
+var ee = new EventEmitter();
+var handler = function() {};
+
+assert.strictEqual(ee.eventNames().length, 0);
+
+assert.strictEqual(ee._events.hasOwnProperty, undefined);
+assert.strictEqual(ee._events.toString, undefined);
+
+ee.on('__defineGetter__', handler);
+ee.on('toString', handler);
+ee.on('__proto__', handler);
+
+assert.strictEqual(ee.eventNames()[0], '__defineGetter__');
+assert.strictEqual(ee.eventNames()[1], 'toString');
+
+assert.strictEqual(ee.listeners('__defineGetter__').length, 1);
+assert.strictEqual(ee.listeners('__defineGetter__')[0], handler);
+assert.strictEqual(ee.listeners('toString').length, 1);
+assert.strictEqual(ee.listeners('toString')[0], handler);
+
+// Only run __proto__ tests if that property can actually be set
+if ({ __proto__: 'ok' }.__proto__ === 'ok') {
+  assert.strictEqual(ee.eventNames().length, 3);
+  assert.strictEqual(ee.eventNames()[2], '__proto__');
+  assert.strictEqual(ee.listeners('__proto__').length, 1);
+  assert.strictEqual(ee.listeners('__proto__')[0], handler);
+
+  ee.on('__proto__', common.mustCall(function(val) {
+    assert.strictEqual(val, 1);
+  }));
+  ee.emit('__proto__', 1);
+
+  process.on('__proto__', common.mustCall(function(val) {
+    assert.strictEqual(val, 1);
+  }));
+  process.emit('__proto__', 1);
+} else {
+  console.log('# skipped __proto__')
+}
diff --git a/mqtt-backend/node_modules/events/tests/subclass.js b/mqtt-backend/node_modules/events/tests/subclass.js
new file mode 100644
index 0000000..bd033ff
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/subclass.js
@@ -0,0 +1,66 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var common = require('./common');
+var test = require('tape');
+var assert = require('assert');
+var EventEmitter = require('../').EventEmitter;
+var util = require('util');
+
+util.inherits(MyEE, EventEmitter);
+
+function MyEE(cb) {
+  this.once(1, cb);
+  this.emit(1);
+  this.removeAllListeners();
+  EventEmitter.call(this);
+}
+
+var myee = new MyEE(common.mustCall());
+
+
+util.inherits(ErrorEE, EventEmitter);
+function ErrorEE() {
+  this.emit('error', new Error('blerg'));
+}
+
+assert.throws(function() {
+  new ErrorEE();
+}, /blerg/);
+
+test.onFinish(function() {
+  assert.ok(!(myee._events instanceof Object));
+  assert.strictEqual(Object.keys(myee._events).length, 0);
+});
+
+
+function MyEE2() {
+  EventEmitter.call(this);
+}
+
+MyEE2.prototype = new EventEmitter();
+
+var ee1 = new MyEE2();
+var ee2 = new MyEE2();
+
+ee1.on('x', function() {});
+
+assert.strictEqual(ee2.listenerCount('x'), 0);
diff --git a/mqtt-backend/node_modules/events/tests/symbols.js b/mqtt-backend/node_modules/events/tests/symbols.js
new file mode 100644
index 0000000..0721f0e
--- /dev/null
+++ b/mqtt-backend/node_modules/events/tests/symbols.js
@@ -0,0 +1,25 @@
+'use strict';
+
+var common = require('./common');
+var EventEmitter = require('../');
+var assert = require('assert');
+
+var ee = new EventEmitter();
+var foo = Symbol('foo');
+var listener = common.mustCall();
+
+ee.on(foo, listener);
+assert.strictEqual(ee.listeners(foo).length, 1);
+assert.strictEqual(ee.listeners(foo)[0], listener);
+
+ee.emit(foo);
+
+ee.removeAllListeners();
+assert.strictEqual(ee.listeners(foo).length, 0);
+
+ee.on(foo, listener);
+assert.strictEqual(ee.listeners(foo).length, 1);
+assert.strictEqual(ee.listeners(foo)[0], listener);
+
+ee.removeListener(foo, listener);
+assert.strictEqual(ee.listeners(foo).length, 0);
diff --git a/mqtt-backend/node_modules/fast-unique-numbers/LICENSE b/mqtt-backend/node_modules/fast-unique-numbers/LICENSE
new file mode 100644
index 0000000..2f04624
--- /dev/null
+++ b/mqtt-backend/node_modules/fast-unique-numbers/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Christoph Guttandin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/fast-unique-numbers/README.md b/mqtt-backend/node_modules/fast-unique-numbers/README.md
new file mode 100644
index 0000000..41d5b3c
--- /dev/null
+++ b/mqtt-backend/node_modules/fast-unique-numbers/README.md
@@ -0,0 +1,55 @@
+# fast-unique-numbers
+
+**A module to create a set of unique numbers as fast as possible.**
+
+[![version](https://img.shields.io/npm/v/fast-unique-numbers.svg?style=flat-square)](https://www.npmjs.com/package/fast-unique-numbers)
+
+This module is meant to create unique numbers within a given [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) or [Set](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set). To achieve that as fast as possible the resulting set of numbers will only contain integers. Additionally only small integers will be used for as long as possible. Small integers can be stored more efficiently by JavaScript engines like [SpiderMonkey](https://spidermonkey.dev/) or [V8](https://v8.dev).
+
+To verify the expected perfomance benefit an expectation test is used to make sure small integers do actually perform better in Chromium based browsers, Firefox and when using Node.js.
+
+## Usage
+
+This module is available on [npm](https://www.npmjs.com/package/fast-unique-numbers) and can be
+installed by running the following command:
+
+```shell
+npm install fast-unique-numbers
+```
+
+This module exports two functions.
+
+### addUniqueNumber()
+
+This function takes a `Set` of numbers as argument and appends a new unique number to it. It also returns that number.
+
+```js
+import { addUniqueNumber } from 'fast-unique-numbers';
+
+const set = new Set([1, 4, 8]);
+const uniqueNumber = addUniqueNumber(set);
+
+console.log(uniqueNumber); // 3
+console.log(set); // Set(4) { 1, 4, 8, 3 }
+```
+
+### generateUniqueNumber()
+
+This function can be used to generate a unique number which is not yet present in the given `Set` or is no key in the given `Map`. The resulting number gets not appended. It only gets returned.
+
+```js
+import { generateUniqueNumber } from 'fast-unique-numbers';
+
+const map = new Map([
+    [1, 'something'],
+    [4, 'something else']
+]);
+
+const uniqueNumber = generateUniqueNumber(map);
+
+console.log(uniqueNumber); // 2
+```
+
+## Security contact information
+
+To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure.
diff --git a/mqtt-backend/node_modules/fast-unique-numbers/package.json b/mqtt-backend/node_modules/fast-unique-numbers/package.json
new file mode 100644
index 0000000..05ea87c
--- /dev/null
+++ b/mqtt-backend/node_modules/fast-unique-numbers/package.json
@@ -0,0 +1,82 @@
+{
+    "author": "Christoph Guttandin",
+    "browser": "build/es5/bundle.js",
+    "bugs": {
+        "url": "https://github.com/chrisguttandin/fast-unique-numbers/issues"
+    },
+    "config": {
+        "commitizen": {
+            "path": "cz-conventional-changelog"
+        }
+    },
+    "dependencies": {
+        "@babel/runtime": "^7.29.2",
+        "tslib": "^2.8.1"
+    },
+    "description": "A module to create a set of unique numbers as fast as possible.",
+    "devDependencies": {
+        "@babel/cli": "^7.28.6",
+        "@babel/core": "^7.29.0",
+        "@babel/plugin-external-helpers": "^7.27.1",
+        "@babel/plugin-transform-runtime": "^7.29.0",
+        "@babel/preset-env": "^7.29.2",
+        "@commitlint/cli": "^20.5.0",
+        "@commitlint/config-angular": "^20.5.0",
+        "@rollup/plugin-babel": "^7.0.0",
+        "@vitest/browser-webdriverio": "^4.1.0",
+        "commitizen": "^4.3.1",
+        "cz-conventional-changelog": "^3.3.0",
+        "eslint": "^8.57.0",
+        "eslint-config-holy-grail": "^61.0.11",
+        "husky": "^9.1.7",
+        "lint-staged": "^16.4.0",
+        "prettier": "^3.8.1",
+        "rimraf": "^6.1.3",
+        "rollup": "^4.59.0",
+        "tinybench": "^4.0.1",
+        "tsconfig-holy-grail": "^15.0.3",
+        "tslint": "^6.1.3",
+        "tslint-config-holy-grail": "^56.0.7",
+        "typescript": "^5.9.3",
+        "vitest": "^4.1.0"
+    },
+    "engines": {
+        "node": ">=18.2.0"
+    },
+    "files": [
+        "build/es2019/",
+        "build/es5/",
+        "build/node/",
+        "src/"
+    ],
+    "homepage": "https://github.com/chrisguttandin/fast-unique-numbers",
+    "keywords": [
+        "performance",
+        "speed"
+    ],
+    "license": "MIT",
+    "main": "build/node/module.js",
+    "module": "build/es2019/module.js",
+    "name": "fast-unique-numbers",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/chrisguttandin/fast-unique-numbers.git"
+    },
+    "scripts": {
+        "build": "rimraf build/* && tsc --project src/tsconfig.json && rollup --config config/rollup/bundle.mjs && babel ./build/es2019 --config-file ./config/babel/build.json --out-dir ./build/node",
+        "lint": "npm run lint:config && npm run lint:src && npm run lint:test",
+        "lint:config": "eslint --config config/eslint/config.json --ext .cjs --ext .js --ext .mjs --report-unused-disable-directives config/",
+        "lint:src": "tslint --config config/tslint/src.json --project src/tsconfig.json src/*.ts src/**/*.ts",
+        "lint:test": "eslint --config config/eslint/test.json --ext .js --report-unused-disable-directives test/",
+        "prepare": "husky",
+        "prepublishOnly": "npm run build",
+        "test": "npm run lint && npm run build && npm run test:expectation-chrome && npm run test:expectation-firefox && npm run test:expectation-node && npm run test:unit-browser && npm run test:unit-node",
+        "test:expectation-chrome": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"expectation\" ] && [ \"$TARGET\" = \"\" -o \"$TARGET\" = \"chrome\" ]; then npx vitest --config config/vitest/expectation-chrome-current.ts; fi",
+        "test:expectation-firefox": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"expectation\" ] && [ \"$TARGET\" = \"\" -o \"$TARGET\" = \"firefox\" ]; then npx vitest --config config/vitest/expectation-firefox-current.ts; fi",
+        "test:expectation-node": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"expectation\" ] && [ \"$TARGET\" = \"\" -o \"$TARGET\" = \"node\" ]; then npx vitest --config config/vitest/expectation-node.ts; fi",
+        "test:unit-browser": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"unit\" ] && [ \"$TARGET\" = \"\" -o \"$TARGET\" = \"chrome\" -o \"$TARGET\" = \"firefox\" -o \"$TARGET\" = \"safari\" ]; then npx vitest --config config/vitest/unit.ts; fi",
+        "test:unit-node": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"unit\" ] && [ \"$TARGET\" = \"\" -o \"$TARGET\" = \"node\" ]; then npx vitest --browser.enabled false --config config/vitest/unit.ts; fi"
+    },
+    "types": "build/es2019/module.d.ts",
+    "version": "9.0.27"
+}
diff --git a/mqtt-backend/node_modules/fast-unique-numbers/src/factories/add-unique-number.ts b/mqtt-backend/node_modules/fast-unique-numbers/src/factories/add-unique-number.ts
new file mode 100644
index 0000000..974d6dd
--- /dev/null
+++ b/mqtt-backend/node_modules/fast-unique-numbers/src/factories/add-unique-number.ts
@@ -0,0 +1,11 @@
+import type { createGenerateUniqueNumber } from './generate-unique-number';
+
+export const createAddUniqueNumber = (generateUniqueNumber: ReturnType<typeof createGenerateUniqueNumber>) => {
+    return (set: Set<number>) => {
+        const number = generateUniqueNumber(set);
+
+        set.add(number);
+
+        return number;
+    };
+};
diff --git a/mqtt-backend/node_modules/fast-unique-numbers/src/factories/cache.ts b/mqtt-backend/node_modules/fast-unique-numbers/src/factories/cache.ts
new file mode 100644
index 0000000..44890a2
--- /dev/null
+++ b/mqtt-backend/node_modules/fast-unique-numbers/src/factories/cache.ts
@@ -0,0 +1,7 @@
+export const createCache = (lastNumberWeakMap: WeakMap<Map<number, any> | Set<number>, number>) => {
+    return (collection: Map<number, any> | Set<number>, nextNumber: number) => {
+        lastNumberWeakMap.set(collection, nextNumber);
+
+        return nextNumber;
+    };
+};
diff --git a/mqtt-backend/node_modules/fast-unique-numbers/src/factories/generate-unique-number.ts b/mqtt-backend/node_modules/fast-unique-numbers/src/factories/generate-unique-number.ts
new file mode 100644
index 0000000..b4c3832
--- /dev/null
+++ b/mqtt-backend/node_modules/fast-unique-numbers/src/factories/generate-unique-number.ts
@@ -0,0 +1,58 @@
+import type { createCache } from './cache';
+
+/*
+ * The value of the constant Number.MAX_SAFE_INTEGER equals (2 ** 53 - 1) but it
+ * is fairly new.
+ */
+const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER === undefined ? 9007199254740991 : Number.MAX_SAFE_INTEGER;
+const TWO_TO_THE_POWER_OF_TWENTY_NINE = 536870912;
+const TWO_TO_THE_POWER_OF_THIRTY = TWO_TO_THE_POWER_OF_TWENTY_NINE * 2;
+
+export const createGenerateUniqueNumber = (
+    cache: ReturnType<typeof createCache>,
+    lastNumberWeakMap: WeakMap<Map<number, any> | Set<number>, number>
+) => {
+    return (collection: Map<number, any> | Set<number>) => {
+        const lastNumber = lastNumberWeakMap.get(collection);
+
+        /*
+         * Let's try the cheapest algorithm first. It might fail to produce a new
+         * number, but it is so cheap that it is okay to take the risk. Just
+         * increase the last number by one or reset it to 0 if we reached the upper
+         * bound of SMIs (which stands for small integers). When the last number is
+         * unknown it is assumed that the collection contains zero based consecutive
+         * numbers.
+         */
+        let nextNumber = lastNumber === undefined ? collection.size : lastNumber < TWO_TO_THE_POWER_OF_THIRTY ? lastNumber + 1 : 0;
+
+        if (!collection.has(nextNumber)) {
+            return cache(collection, nextNumber);
+        }
+
+        /*
+         * If there are less than half of 2 ** 30 numbers stored in the collection,
+         * the chance to generate a new random number in the range from 0 to 2 ** 30
+         * is at least 50%. It's benifitial to use only SMIs because they perform
+         * much better in any environment based on V8.
+         */
+        if (collection.size < TWO_TO_THE_POWER_OF_TWENTY_NINE) {
+            while (collection.has(nextNumber)) {
+                nextNumber = Math.floor(Math.random() * TWO_TO_THE_POWER_OF_THIRTY);
+            }
+
+            return cache(collection, nextNumber);
+        }
+
+        // Quickly check if there is a theoretical chance to generate a new number.
+        if (collection.size > MAX_SAFE_INTEGER) {
+            throw new Error('Congratulations, you created a collection of unique numbers which uses all available integers!');
+        }
+
+        // Otherwise use the full scale of safely usable integers.
+        while (collection.has(nextNumber)) {
+            nextNumber = Math.floor(Math.random() * MAX_SAFE_INTEGER);
+        }
+
+        return cache(collection, nextNumber);
+    };
+};
diff --git a/mqtt-backend/node_modules/fast-unique-numbers/src/module.ts b/mqtt-backend/node_modules/fast-unique-numbers/src/module.ts
new file mode 100644
index 0000000..f6cfa29
--- /dev/null
+++ b/mqtt-backend/node_modules/fast-unique-numbers/src/module.ts
@@ -0,0 +1,11 @@
+import { createAddUniqueNumber } from './factories/add-unique-number';
+import { createCache } from './factories/cache';
+import { createGenerateUniqueNumber } from './factories/generate-unique-number';
+
+const LAST_NUMBER_WEAK_MAP = new WeakMap<Map<number, any> | Set<number>, number>();
+
+const cache = createCache(LAST_NUMBER_WEAK_MAP);
+const generateUniqueNumber = createGenerateUniqueNumber(cache, LAST_NUMBER_WEAK_MAP);
+const addUniqueNumber = createAddUniqueNumber(generateUniqueNumber);
+
+export { addUniqueNumber, generateUniqueNumber };
diff --git a/mqtt-backend/node_modules/fast-unique-numbers/src/tsconfig.json b/mqtt-backend/node_modules/fast-unique-numbers/src/tsconfig.json
new file mode 100644
index 0000000..d10f129
--- /dev/null
+++ b/mqtt-backend/node_modules/fast-unique-numbers/src/tsconfig.json
@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "isolatedModules": true
+    },
+    "extends": "tsconfig-holy-grail/src/tsconfig-universal"
+}
diff --git a/mqtt-backend/node_modules/fastfall/.npmignore b/mqtt-backend/node_modules/fastfall/.npmignore
new file mode 100644
index 0000000..123ae94
--- /dev/null
+++ b/mqtt-backend/node_modules/fastfall/.npmignore
@@ -0,0 +1,27 @@
+# Logs
+logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directory
+# https://www.npmjs.org/doc/misc/npm-faq.html#should-i-check-my-node_modules-folder-into-git
+node_modules
diff --git a/mqtt-backend/node_modules/fastfall/.travis.yml b/mqtt-backend/node_modules/fastfall/.travis.yml
new file mode 100644
index 0000000..b3cae87
--- /dev/null
+++ b/mqtt-backend/node_modules/fastfall/.travis.yml
@@ -0,0 +1,16 @@
+sudo: false
+language: node_js
+
+node_js:
+  - "0.10"
+  - "0.12"
+  - "iojs"
+  - "4"
+  - "5"
+  
+cache:
+  directories:
+    - node_modules
+
+after_script:
+  npm run coveralls
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/fastfall/LICENSE b/mqtt-backend/node_modules/fastfall/LICENSE
new file mode 100644
index 0000000..fbf3a01
--- /dev/null
+++ b/mqtt-backend/node_modules/fastfall/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Matteo Collina
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
diff --git a/mqtt-backend/node_modules/fastfall/README.md b/mqtt-backend/node_modules/fastfall/README.md
new file mode 100644
index 0000000..d88109e
--- /dev/null
+++ b/mqtt-backend/node_modules/fastfall/README.md
@@ -0,0 +1,232 @@
+# fastfall
+
+[![npm version][npm-badge]][npm-url]
+[![Build Status][travis-badge]][travis-url]
+[![Coverage Status][coveralls-badge]][coveralls-url]
+[![Dependency Status][david-badge]][david-url]
+
+## call your callbacks in a waterfall, without overhead
+
+Benchmark for doing 3 calls `setImmediate` 100 thousands times:
+
+* non-reusable setImmediate: 407ms
+* [async.waterfall](https://github.com/caolan/async#waterfall): 1203ms
+* [run-waterfall](http://npm.im/run-waterfall): 1432ms
+* [insync.wasterfall](https://www.npmjs.com/package/insync#waterfall):
+  1570ms
+* [neo-async.wasterfall](http://suguru03.github.io/neo-async/doc/async.waterfall.html):
+  445ms
+* [waterfallize](http://npm.im/waterfallize): 757ms
+* `fastfall`: 432ms
+* `fastfall` compiled: 428ms
+
+
+These benchmarks where taken via `bench.js` on node 4.2.2, on a MacBook
+Pro Retina 2014 (i7, 16GB of RAM).
+
+If you need zero-overhead series function call, check out
+[fastseries](http://npm.im/fastseries), for parallel calls check out
+[fastparallel](http://npm.im/fastparallel), and for a fast work queue
+use [fastq](http://npm.im/fastq).
+
+[![js-standard-style](https://raw.githubusercontent.com/feross/standard/master/badge.png)](https://github.com/feross/standard)
+
+## Install
+
+```
+npm install fastfall --save
+```
+
+## Usage
+
+```js
+var fall = require('fastfall')()
+
+fall([
+  function a (cb) {
+    console.log('called a')
+    cb(null, 'a')
+  },
+  function b (a, cb) {
+    console.log('called b with:', a)
+    cb(null, 'a', 'b')
+  },
+  function c (a, b, cb) {
+    console.log('called c with:', a, b)
+    cb(null, 'a', 'b', 'c')
+  }], function result (err, a, b, c) {
+    console.log('result arguments', arguments)
+  })
+```
+
+You can also set `this` when you create a fall:
+
+```js
+var that = { hello: 'world' }
+var fall = require('fastfall')(that)
+
+fall([a, b, c], result)
+
+function a (cb) {
+  console.log(this)
+  console.log('called a')
+  cb(null, 'a')
+}
+
+function b (a, cb) {
+  console.log('called b with:', a)
+  cb(null, 'a', 'b')
+}
+
+function c (a, b, cb) {
+  console.log('called c with:', a, b)
+  cb(null, 'a', 'b', 'c')
+}
+
+function result (err, a, b, c) {
+  console.log('result arguments', arguments)
+}
+```
+
+You can also set `this` when you run a task:
+
+```js
+var that = { hello: 'world' }
+var fall = require('fastfall')()
+
+fall(new State('world'), [
+  a, b, c,
+], console.log)
+
+function State (value) {
+  this.value = value
+}
+
+function a (cb) {
+  console.log(this.value)
+  console.log('called a')
+  cb(null, 'a')
+}
+
+function b (a, cb) {
+  console.log('called b with:', a)
+  cb(null, 'a', 'b')
+}
+
+function c (a, b, cb) {
+  console.log('called c with:', a, b)
+  cb(null, 'a', 'b', 'c')
+}
+```
+
+### Compile a waterfall
+
+```js
+var fall = require('fastfall')([
+  function a (arg, cb) {
+    console.log('called a')
+    cb(null, arg)
+  },
+  function b (a, cb) {
+    console.log('called b with:', a)
+    cb(null, 'a', 'b')
+  },
+  function c (a, b, cb) {
+    console.log('called c with:', a, b)
+    cb(null, 'a', 'b', 'c')
+  }])
+
+// a compiled fall supports arguments too!
+fall(42, function result (err, a, b, c) {
+  console.log('result arguments', arguments)
+})
+```
+
+You can set `this` by doing:
+
+```js
+var that = { hello: 'world' }
+var fall = require('fastfall')(that, [
+  function a (arg, cb) {
+    console.log('this is', this)
+    console.log('called a')
+    cb(null, arg)
+  },
+  function b (a, cb) {
+    console.log('called b with:', a)
+    cb(null, 'a', 'b')
+  },
+  function c (a, b, cb) {
+    console.log('called c with:', a, b)
+    cb(null, 'a', 'b', 'c')
+  }])
+
+// a compiled fall supports arguments too!
+fall(42, function result (err, a, b, c) {
+  console.log('result arguments', arguments)
+})
+```
+
+or you can simply attach it to an object:
+
+```js
+var that = { hello: 'world' }
+that.doSomething = require('fastfall')([
+  function a (arg, cb) {
+    console.log('this is', this)
+    console.log('called a')
+    cb(null, arg)
+  },
+  function b (a, cb) {
+    console.log('called b with:', a)
+    cb(null, 'a', 'b')
+  },
+  function c (a, b, cb) {
+    console.log('called c with:', a, b)
+    cb(null, 'a', 'b', 'c')
+  }])
+
+// a compiled fall supports arguments too!
+that.doSomething(42, function result (err, a, b, c) {
+  console.log('this is', this)
+  console.log('result arguments', arguments)
+})
+```
+
+## API
+
+### fastfall([this], [functions])
+
+Creates a `fall`, it can either be pre-filled with a `this` value
+and an array of functions.
+
+If there is no list of functions, [a not-compiled fall](#not-compiled)
+is returned, if there is a list of function [a compiled fall](#compiled)
+is returned.
+
+<a name="not-compiled"></a>
+### fall([this], functions, [done])
+
+Calls the functions in a waterfall, forwarding the arguments from one to
+another. Calls `done` when it has finished.
+
+<a name="compiled"></a>
+### fall(args..., [done])
+
+Calls the compiled functions in a waterfall, forwarding the arguments from one to
+another. Additionally, a user can specify some arguments for the first
+function, too. Calls `done` when it has finished.
+
+## License
+
+MIT
+
+
+[npm-badge]: https://badge.fury.io/js/fastfall.svg
+[npm-url]: https://badge.fury.io/js/fastfall
+[travis-badge]: https://api.travis-ci.org/mcollina/fastfall.svg
+[travis-url]: https://travis-ci.org/mcollina/fastfall
+[coveralls-badge]:https://coveralls.io/repos/mcollina/fastfall/badge.svg?branch=master&service=github
+[coveralls-url]: https://coveralls.io/github/mcollina/fastfall?branch=master
+[david-badge]: https://david-dm.org/mcollina/fastfall.svg
+[david-url]: https://david-dm.org/mcollina/fastfall
diff --git a/mqtt-backend/node_modules/fastfall/bench.js b/mqtt-backend/node_modules/fastfall/bench.js
new file mode 100644
index 0000000..2d2d508
--- /dev/null
+++ b/mqtt-backend/node_modules/fastfall/bench.js
@@ -0,0 +1,81 @@
+'use strict'
+
+var max = 100000
+var async = require('async')
+var insync = require('insync')
+var neoAsync = require('neo-async')
+var fall = require('./')()
+var runWaterfall = require('run-waterfall')
+var waterfallize = require('waterfallize')
+var bench = require('fastbench')
+
+var nextDone
+var nextCount
+
+function benchSetImmediate (done) {
+  nextCount = 3
+  nextDone = done
+  setImmediate(somethingImmediate)
+}
+
+function somethingImmediate () {
+  nextCount--
+  if (nextCount === 0) {
+    nextDone()
+  } else {
+    setImmediate(somethingImmediate)
+  }
+}
+
+function somethingB (cb) {
+  setImmediate(cb)
+}
+
+function somethingA (cb) {
+  setImmediate(cb)
+}
+
+var toCall = [somethingA, somethingB, somethingB]
+function benchAsyncWaterfall (done) {
+  async.waterfall(toCall, done)
+}
+
+function benchFastFall (done) {
+  fall(toCall, done)
+}
+
+function benchWaterfallize (done) {
+  var next = waterfallize()
+
+  next(toCall[0])
+  next(toCall[1])
+  next(toCall[2])
+  next(done)
+}
+
+function benchRunWaterFall (done) {
+  runWaterfall(toCall, done)
+}
+
+function benchInsync (done) {
+  insync.waterfall(toCall, done)
+}
+
+function benchNeoAsync (done) {
+  neoAsync.waterfall(toCall, done)
+}
+
+var compiled = require('./')(toCall)
+
+var run = bench([
+  benchAsyncWaterfall,
+  benchInsync,
+  benchNeoAsync,
+  benchRunWaterFall,
+  benchSetImmediate,
+  benchWaterfallize,
+  benchFastFall,
+  compiled
+], max)
+
+run(run)
diff --git a/mqtt-backend/node_modules/fastfall/example.js b/mqtt-backend/node_modules/fastfall/example.js
new file mode 100644
index 0000000..7038c39
--- /dev/null
+++ b/mqtt-backend/node_modules/fastfall/example.js
@@ -0,0 +1,20 @@
+'use strict'
+
+var fall = require('./')()
+
+fall([
+  function a (cb) {
+    console.log('called a')
+    cb(null, 'a')
+  },
+  function b (a, cb) {
+    console.log('called b with:', a)
+    cb(null, 'a', 'b')
+  },
+  function c (a, b, cb) {
+    console.log('called c with:', a, b)
+    cb(null, 'a', 'b', 'c')
+  }
+], function result (err, a, b, c) {
+  console.log('result arguments', err, a, b, c)
+})
diff --git a/mqtt-backend/node_modules/fastfall/fall.js b/mqtt-backend/node_modules/fastfall/fall.js
new file mode 100644
index 0000000..6744e34
--- /dev/null
+++ b/mqtt-backend/node_modules/fastfall/fall.js
@@ -0,0 +1,150 @@
+'use strict'
+
+var reusify = require('reusify')
+var empty = []
+
+function fastfall (context, template) {
+  if (Array.isArray(context)) {
+    template = context
+    context = null
+  }
+
+  var queue = reusify(Holder)
+
+  return template ? compiled : fall
+
+  function fall () {
+    var current = queue.get()
+    current.release = release
+
+    if (arguments.length === 3) {
+      current.context = arguments[0]
+      current.list = arguments[1]
+      current.callback = arguments[2] || noop
+    } else {
+      current.context = context
+      current.list = arguments[0]
+      current.callback = arguments[1] || noop
+    }
+
+    current.work()
+  }
+
+  function release (holder) {
+    queue.release(holder)
+  }
+
+  function compiled () {
+    var current = queue.get()
+    current.release = release
+
+    current.list = template
+
+    var args
+    var i
+    var len = arguments.length - 1
+
+    current.context = this || context
+    current.callback = arguments[len] || noop
+
+    switch (len) {
+      case 0:
+        current.work()
+        break
+      case 1:
+        current.work(null, arguments[0])
+        break
+      case 2:
+        current.work(null, arguments[0], arguments[1])
+        break
+      case 3:
+        current.work(null, arguments[0], arguments[1], arguments[2])
+        break
+      case 4:
+        current.work(null, arguments[0], arguments[1], arguments[2], arguments[3])
+        break
+      default:
+        args = new Array(len + 1)
+        args[0] = null
+        for (i = 0; i < len; i++) {
+          args[i + 1] = arguments[i]
+        }
+        current.work.apply(null, args)
+    }
+  }
+}
+
+function noop () {}
+
+function Holder () {
+  this.list = empty
+  this.callback = noop
+  this.count = 0
+  this.context = undefined
+  this.release = noop
+
+  var that = this
+
+  this.work = function work () {
+    if (arguments.length > 0 && arguments[0]) {
+      return that.callback.call(that.context, arguments[0])
+    }
+
+    var len = arguments.length
+    var i
+    var args
+    var func
+
+    if (that.count < that.list.length) {
+      func = that.list[that.count++]
+      switch (len) {
+        case 0:
+        case 1:
+          return func.call(that.context, work)
+        case 2:
+          return func.call(that.context, arguments[1], work)
+        case 3:
+          return func.call(that.context, arguments[1], arguments[2], work)
+        case 4:
+          return func.call(that.context, arguments[1], arguments[2], arguments[3], work)
+        default:
+          args = new Array(len)
+          for (i = 1; i < len; i++) {
+            args[i - 1] = arguments[i]
+          }
+          args[len - 1] = work
+          func.apply(that.context, args)
+      }
+    } else {
+      switch (len) {
+        case 0:
+          that.callback.call(that.context)
+          break
+        case 1:
+          that.callback.call(that.context, arguments[0])
+          break
+        case 2:
+          that.callback.call(that.context, arguments[0], arguments[1])
+          break
+        case 3:
+          that.callback.call(that.context, arguments[0], arguments[1], arguments[2])
+          break
+        case 4:
+          that.callback.call(that.context, arguments[0], arguments[1], arguments[2], arguments[3])
+          break
+        default:
+          args = new Array(len)
+          for (i = 0; i < len; i++) {
+            args[i] = arguments[i]
+          }
+          that.callback.apply(that.context, args)
+      }
+      that.context = undefined
+      that.list = empty
+      that.count = 0
+      that.release(that)
+    }
+  }
+}
+
+module.exports = fastfall
diff --git a/mqtt-backend/node_modules/fastfall/package.json b/mqtt-backend/node_modules/fastfall/package.json
new file mode 100644
index 0000000..23f01cf
--- /dev/null
+++ b/mqtt-backend/node_modules/fastfall/package.json
@@ -0,0 +1,54 @@
+{
+  "name": "fastfall",
+  "version": "1.5.1",
+  "description": "call your callbacks in a waterfall, at speed",
+  "main": "fall.js",
+  "scripts": {
+    "lint": "standard",
+    "test": "tape test.js | faucet",
+    "coverage": "istanbul cover tape test.js | tap-spec",
+    "coveralls": "npm run coverage ; cat ./coverage/lcov.info | coveralls"
+  },
+  "precommit": [
+    "lint",
+    "test"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/mcollina/fastfall.git"
+  },
+  "keywords": [
+    "async",
+    "waterfall",
+    "fall",
+    "fast",
+    "callback"
+  ],
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mcollina/fastfall/issues"
+  },
+  "homepage": "https://github.com/mcollina/fastfall#readme",
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "devDependencies": {
+    "async": "^1.0.0",
+    "coveralls": "^2.11.6",
+    "fastbench": "^1.0.0",
+    "faucet": "0.0.1",
+    "insync": "^2.1.1",
+    "istanbul": "^0.4.1",
+    "neo-async": "^1.7.0",
+    "pre-commit": "^1.0.10",
+    "run-waterfall": "^1.1.1",
+    "standard": "^5.0.0",
+    "tap-spec": "^4.1.1",
+    "tape": "^4.0.0",
+    "waterfallize": "^1.0.0"
+  },
+  "dependencies": {
+    "reusify": "^1.0.0"
+  }
+}
diff --git a/mqtt-backend/node_modules/fastfall/test.js b/mqtt-backend/node_modules/fastfall/test.js
new file mode 100644
index 0000000..f15b553
--- /dev/null
+++ b/mqtt-backend/node_modules/fastfall/test.js
@@ -0,0 +1,193 @@
+'use strict'
+
+var test = require('tape')
+var fastfall = require('./')
+
+test('basically works', function (t) {
+  t.plan(22)
+
+  var fall = fastfall()
+
+  fall([
+    function a (cb) {
+      cb(null, 'a')
+    },
+    function b (a, cb) {
+      t.equal(a, 'a', 'second function arg matches')
+      cb(null, 'a', 'b')
+    },
+    function c (a, b, cb) {
+      t.equal(a, 'a', 'third function 1st arg matches')
+      t.equal(b, 'b', 'third function 2nd arg matches')
+      cb(null, 'a', 'b', 'c')
+    },
+    function d (a, b, c, cb) {
+      t.equal(a, 'a', 'fourth function 1st arg matches')
+      t.equal(b, 'b', 'fourth function 2nd arg matches')
+      t.equal(c, 'c', 'fourth function 3rd arg matches')
+      cb(null, 'a', 'b', 'c', 'd')
+    },
+    function e (a, b, c, d, cb) {
+      t.equal(a, 'a', 'fifth function 1st arg matches')
+      t.equal(b, 'b', 'fifth function 2nd arg matches')
+      t.equal(c, 'c', 'fifth function 3rd arg matches')
+      t.equal(d, 'd', 'fifth function 4th arg matches')
+      cb(null, 'a', 'b', 'c', 'd', 'e')
+    },
+    function f (a, b, c, d, e, cb) {
+      t.equal(a, 'a', 'sixth function 1st arg matches')
+      t.equal(b, 'b', 'sixth function 2nd arg matches')
+      t.equal(c, 'c', 'sixth function 3rd arg matches')
+      t.equal(d, 'd', 'sixth function 4th arg matches')
+      t.equal(e, 'e', 'sixth function 5th arg matches')
+      cb(null, 'a', 'b', 'c', 'd', 'e', 'f')
+    }
+  ], function result (err, a, b, c, d, e, f) {
+    t.error(err, 'no error')
+    t.equal(a, 'a', 'result function 2nd arg matches')
+    t.equal(b, 'b', 'result function 3rd arg matches')
+    t.equal(c, 'c', 'result function 4th arg matches')
+    t.equal(d, 'd', 'result function 5th arg matches')
+    t.equal(e, 'e', 'result function 6th arg matches')
+    t.equal(f, 'f', 'result function 7th arg matches')
+  })
+})
+
+test('call with error', function (t) {
+  t.plan(4)
+
+  var fall = fastfall()
+
+  fall([
+    function a (cb) {
+      cb(null, 'a')
+    },
+    function b (a, cb) {
+      t.equal(a, 'a', 'second function arg matches')
+      cb(new Error('this is expected!'), 'a', 'b')
+    },
+    function c (a, b, cb) {
+      t.fail('this should never happen')
+    }
+  ], function result (err, a, b, c) {
+    t.ok(err, 'error')
+    t.notOk(a, 'no 2nd arg')
+    t.notOk(b, 'no 3rd arg')
+  })
+})
+
+test('compiles a reusable fall', function (t) {
+  t.plan(10)
+
+  var fall = fastfall([
+    function a (arg, cb) {
+      cb(null, arg)
+    },
+    function b (a, cb) {
+      cb(null, a, 'b')
+    },
+    function c (a, b, cb) {
+      t.equal(b, 'b', 'third function 2nd arg matches')
+      cb(null, a, 'b', 'c')
+    }
+  ])
+
+  fall(42, function result (err, a, b, c) {
+    t.error(err, 'no error')
+    t.equal(a, 42, 'result function 2nd arg matches')
+    t.equal(b, 'b', 'result function 3rd arg matches')
+    t.equal(c, 'c', 'result function 4th arg matches')
+  })
+
+  fall(24, function result (err, a, b, c) {
+    t.error(err, 'no error')
+    t.equal(a, 24, 'result function 2nd arg matches')
+    t.equal(b, 'b', 'result function 3rd arg matches')
+    t.equal(c, 'c', 'result function 4th arg matches')
+  })
+})
+
+test('set this', function (t) {
+  t.plan(2)
+
+  var that = {}
+  var fall = fastfall(that)
+
+  fall([
+    function a (cb) {
+      t.equal(this, that, 'this is set')
+      cb(null, 'a')
+    }
+  ], function result (err, a, b, c) {
+    t.error(err, 'no error')
+  })
+})
+
+test('set this in compiled mode', function (t) {
+  t.plan(4)
+
+  var that = {}
+  var fall = fastfall(that, [
+    function a (arg, cb) {
+      t.equal(this, that, 'this is set')
+      cb(null, arg)
+    }
+  ])
+
+  fall(42, function result (err, a, b, c) {
+    t.error(err, 'no error')
+    t.equal(a, 42, 'result function 2nd arg matches')
+    t.equal(this, that, 'this is set')
+  })
+})
+
+test('set this for a normal fall', function (t) {
+  t.plan(4)
+
+  var that = {}
+  var fall = fastfall()
+
+  fall(that, [
+    function a (cb) {
+      t.equal(this, that, 'this is set')
+      cb(null, 'a')
+    }
+  ], function result (err, a) {
+    t.error(err, 'no error')
+    t.equal(this, that, 'this is set')
+    t.equal(a, 'a', 'result function 2nd arg matches')
+  })
+})
+
+test('use the this of the called object in compiled mode', function (t) {
+  t.plan(4)
+
+  var that = {}
+  var fall = fastfall([
+    function a (arg, cb) {
+      t.equal(this, that, 'this is set')
+      cb(null, arg)
+    }
+  ])
+
+  fall.call(that, 42, function result (err, a, b, c) {
+    t.error(err, 'no error')
+    t.equal(a, 42, 'result function 2nd arg matches')
+    t.equal(this, that, 'this is set')
+  })
+})
+
+test('support errors in compiled mode', function (t) {
+  t.plan(2)
+
+  var fall = fastfall([
+    function a (arg, cb) {
+      t.pass('function is called')
+      cb(new Error('muahaha'), arg)
+    }
+  ])
+
+  fall(42, function result (err) {
+    t.ok(err, 'error is forwarded')
+  })
+})
diff --git a/mqtt-backend/node_modules/fastparallel/.github/dependabot.yml b/mqtt-backend/node_modules/fastparallel/.github/dependabot.yml
new file mode 100644
index 0000000..7e7cbe1
--- /dev/null
+++ b/mqtt-backend/node_modules/fastparallel/.github/dependabot.yml
@@ -0,0 +1,11 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: standard
+    versions:
+    - 16.0.3
diff --git a/mqtt-backend/node_modules/fastparallel/.github/workflows/ci.yml b/mqtt-backend/node_modules/fastparallel/.github/workflows/ci.yml
new file mode 100644
index 0000000..db3911b
--- /dev/null
+++ b/mqtt-backend/node_modules/fastparallel/.github/workflows/ci.yml
@@ -0,0 +1,27 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: ['0.10', '0.12', 4.x, 6.x, 8.x, 12.x, 14.x, 16.x]
+
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: Use Node.js
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Run tests
+        run: |
+          npm run test
diff --git a/mqtt-backend/node_modules/fastparallel/LICENSE b/mqtt-backend/node_modules/fastparallel/LICENSE
new file mode 100644
index 0000000..0b14824
--- /dev/null
+++ b/mqtt-backend/node_modules/fastparallel/LICENSE
@@ -0,0 +1,14 @@
+Copyright (c) 2015, Matteo Collina <matteo.collina@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
diff --git a/mqtt-backend/node_modules/fastparallel/README.md b/mqtt-backend/node_modules/fastparallel/README.md
new file mode 100644
index 0000000..5eea335
--- /dev/null
+++ b/mqtt-backend/node_modules/fastparallel/README.md
@@ -0,0 +1,124 @@
+# fastparallel [![ci](https://github.com/mcollina/fastparallel/actions/workflows/ci.yml/badge.svg)](https://github.com/mcollina/fastparallel/actions/workflows/ci.yml)
+
+Zero-overhead parallel function call for node.js. Also supports each
+and map!
+
+Benchmark for doing 3 calls `setImmediate` 1 million times:
+
+```
+benchSetImmediate*1000000: 1378.514ms
+benchAsyncParallel*1000000: 1740.304ms
+benchAsyncEach*1000000: 1566.517ms
+benchAsyncMap*1000000: 1687.518ms
+benchNeoParallel*1000000: 1388.223ms
+benchNeoEach*1000000: 1473.006ms
+benchNeoMap*1000000: 1402.986ms
+benchInsyncParallel*1000000: 1957.863ms
+benchInsyncEach*1000000: 1383.822ms
+benchInsyncMap*1000000: 1822.954ms
+benchItemsParallel*1000000: 1690.118ms
+benchParallelize*1000000: 1570.064ms
+benchFastParallel*1000000: 1536.692ms
+benchFastParallelNoResults*1000000: 1363.145ms
+benchFastParallelEachResults*1000000: 1508.134ms
+benchFastParallelEach*1000000: 1325.314ms
+```
+
+Obtained on node 12.18.2, on a dedicated server.
+
+If you need zero-overhead series function call, check out
+[fastseries](http://npm.im/fastseries). If you need a fast work queue
+check out [fastq](http://npm.im/fastq). If you need to run fast
+waterfall calls, use [fastfall](http://npm.im/fastfall).
+
+[![js-standard-style](https://raw.githubusercontent.com/feross/standard/master/badge.png)](https://github.com/feross/standard)
+
+__The major difference between version 1.x.x and 2.x.x is the order of
+results__, this is now ready to replace async in every case.
+
+## Example for parallel call
+
+```js
+var parallel = require('fastparallel')({
+  // this is a function that will be called
+  // when a parallel completes
+  released: completed,
+
+  // if you want the results, then here you are
+  results: true
+})
+
+parallel(
+  {}, // what will be this in the functions
+  [something, something, something], // functions to call
+  42, // the first argument of the functions
+  done // the function to be called when the parallel ends
+)
+
+function something (arg, cb) {
+  setImmediate(cb, null, 'myresult')
+}
+
+function done (err, results) {
+  console.log('parallel completed, results:', results)
+}
+
+function completed () {
+  console.log('parallel completed!')
+}
+```
+
+## Example for each and map calls
+
+```js
+var parallel = require('fastparallel')({
+  // this is a function that will be called
+  // when a parallel completes
+  released: completed,
+
+  // if you want the results, then here you are
+  // passing false disables map
+  results: true
+})
+
+parallel(
+  {}, // what will be this in the functions
+  something, // functions to call
+  [1, 2, 3], // the first argument of the functions
+  done // the function to be called when the parallel ends
+)
+
+function something (arg, cb) {
+  setImmediate(cb, null, 'myresult')
+}
+
+function done (err, results) {
+  console.log('parallel completed, results:', results)
+}
+
+function completed () {
+  console.log('parallel completed!')
+}
+
+```
+
+## Caveats
+
+The `done` function will be called only once, even if more than one error happen.
+
+This library works by caching the latest used function, so that running a new parallel
+does not cause **any memory allocations**.
+
+## Why it is so fast?
+
+1. This library is caching functions a lot.
+
+2. V8 optimizations: thanks to caching, the functions can be optimized by V8 (if they are optimizable, and I took great care of making them so).
+
+3. Don't use arrays if you just need a queue. A linked list implemented via processes is much faster if you don't need to access elements in between.
+
+4. Accept passing a this for the functions. Thanks to this hack, you can extract your functions, and place them in a outer level where they are not created at every execution.
+
+## License
+
+ISC
diff --git a/mqtt-backend/node_modules/fastparallel/bench.js b/mqtt-backend/node_modules/fastparallel/bench.js
new file mode 100644
index 0000000..03c1aca
--- /dev/null
+++ b/mqtt-backend/node_modules/fastparallel/bench.js
@@ -0,0 +1,120 @@
+var max = 1000000
+var parallel = require('./')()
+var parallelNoResults = require('./')({ results: false })
+var bench = require('fastbench')
+var async = require('async')
+var neo = require('neo-async')
+var insync = require('insync')
+var items = require('items')
+var parallelize = require('parallelize')
+
+function benchFastParallel (done) {
+  parallel(null, [somethingP, somethingP, somethingP], 42, done)
+}
+
+function benchFastParallelNoResults (done) {
+  parallelNoResults(null, [somethingP, somethingP, somethingP], 42, done)
+}
+
+function benchFastParallelEach (done) {
+  parallelNoResults(null, somethingP, [1, 2, 3], done)
+}
+
+function benchFastParallelEachResults (done) {
+  parallel(null, somethingP, [1, 2, 3], done)
+}
+
+function benchAsyncParallel (done) {
+  async.parallel([somethingA, somethingA, somethingA], done)
+}
+
+function benchInsyncParallel (done) {
+  insync.parallel([somethingA, somethingA, somethingA], done)
+}
+
+function benchNeoParallel (done) {
+  neo.parallel([somethingA, somethingA, somethingA], done)
+}
+
+function benchItemsParallel (done) {
+  items.parallel.execute([somethingA, somethingA, somethingA], done)
+}
+
+function benchParallelize (done) {
+  var next = parallelize(done)
+
+  somethingA(next())
+  somethingA(next())
+  somethingA(next())
+}
+
+function benchAsyncEach (done) {
+  async.each([1, 2, 3], somethingP, done)
+}
+
+function benchNeoEach (done) {
+  neo.each([1, 2, 3], somethingP, done)
+}
+
+function benchAsyncMap (done) {
+  async.map([1, 2, 3], somethingP, done)
+}
+
+function benchNeoMap (done) {
+  neo.map([1, 2, 3], somethingP, done)
+}
+
+function benchInsyncEach (done) {
+  insync.each([1, 2, 3], somethingP, done)
+}
+
+function benchInsyncMap (done) {
+  insync.map([1, 2, 3], somethingP, done)
+}
+
+var nextDone
+var nextCount
+
+function benchSetImmediate (done) {
+  nextCount = 3
+  nextDone = done
+  setImmediate(somethingImmediate)
+  setImmediate(somethingImmediate)
+  setImmediate(somethingImmediate)
+}
+
+function somethingImmediate () {
+  nextCount--
+  if (nextCount === 0) {
+    nextDone()
+  }
+}
+
+function somethingP (arg, cb) {
+  setImmediate(cb)
+}
+
+function somethingA (cb) {
+  setImmediate(cb)
+}
+
+var run = bench([
+  benchSetImmediate,
+  benchAsyncParallel,
+  benchAsyncEach,
+  benchAsyncMap,
+  benchNeoParallel,
+  benchNeoEach,
+  benchNeoMap,
+  benchInsyncParallel,
+  benchInsyncEach,
+  benchInsyncMap,
+  benchItemsParallel,
+  benchParallelize,
+  benchFastParallel,
+  benchFastParallelNoResults,
+  benchFastParallelEachResults,
+  benchFastParallelEach
+], max)
+
+run(run)
diff --git a/mqtt-backend/node_modules/fastparallel/bench_long.js b/mqtt-backend/node_modules/fastparallel/bench_long.js
new file mode 100644
index 0000000..44e1b63
--- /dev/null
+++ b/mqtt-backend/node_modules/fastparallel/bench_long.js
@@ -0,0 +1,41 @@
+var max = 1000000
+var parallel = require('./')()
+var parallelNoResults = require('./')({ results: false })
+var bench = require('fastbench')
+var async = require('async')
+var neo = require('neo-async')
+
+var funcs = []
+
+for (var i = 0; i < 25; i++) {
+  funcs.push(something)
+}
+
+function benchFastParallel (done) {
+  parallel(null, funcs, 42, done)
+}
+
+function benchFastParallelNoResults (done) {
+  parallelNoResults(null, funcs, 42, done)
+}
+
+function benchAsyncParallel (done) {
+  async.parallel(funcs, done)
+}
+
+function benchNeoParallel (done) {
+  neo.parallel(funcs, done)
+}
+
+function something (cb) {
+  setImmediate(cb)
+}
+
+var run = bench([
+  benchAsyncParallel,
+  benchNeoParallel,
+  benchFastParallel,
+  benchFastParallelNoResults
+], max)
+
+run(run)
diff --git a/mqtt-backend/node_modules/fastparallel/example.js b/mqtt-backend/node_modules/fastparallel/example.js
new file mode 100644
index 0000000..b0f0e37
--- /dev/null
+++ b/mqtt-backend/node_modules/fastparallel/example.js
@@ -0,0 +1,40 @@
+var parallel = require('./')({
+  // this is a function that will be called
+  // when a parallel completes
+  released: completed,
+
+  // we want results and errors
+  // passing false will make it faster!
+  results: true
+})
+
+parallel(
+  {}, // what will be this in the functions
+  [something, something, something], // functions to call
+  42, // the first argument of the functions
+  next // the function to be called when the parallel ends
+)
+
+function something (arg, cb) {
+  setImmediate(cb, null, 'myresult')
+}
+
+function next (err, results) {
+  if (err) {
+    // do something here!
+  }
+  console.log('parallel completed, results:', results)
+
+  parallel({}, something, [1, 2, 3], done)
+}
+
+function done (err, results) {
+  if (err) {
+    // do something here!
+  }
+  console.log('parallel completed, results:', results)
+}
+
+function completed () {
+  console.log('parallel completed!')
+}
diff --git a/mqtt-backend/node_modules/fastparallel/package.json b/mqtt-backend/node_modules/fastparallel/package.json
new file mode 100644
index 0000000..5a2a803
--- /dev/null
+++ b/mqtt-backend/node_modules/fastparallel/package.json
@@ -0,0 +1,48 @@
+{
+  "name": "fastparallel",
+  "version": "2.4.1",
+  "description": "Zero-overhead asynchronous parallel/each/map function call",
+  "main": "parallel.js",
+  "scripts": {
+    "lint": "standard",
+    "test": "tape test.js | faucet",
+    "coverage": "nyc --reporter=lcov tape test.js; cat coverage/lcov.info | coveralls"
+  },
+  "pre-commit": [
+    "lint",
+    "test"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mcollina/fastparallel.git"
+  },
+  "keywords": [
+    "parallel",
+    "fast",
+    "async"
+  ],
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/mcollina/fastparallel/issues"
+  },
+  "homepage": "https://github.com/mcollina/fastparallel",
+  "devDependencies": {
+    "async": "^3.1.0",
+    "coveralls": "^3.0.5",
+    "fastbench": "^1.0.1",
+    "faucet": "0.0.1",
+    "insync": "^2.1.1",
+    "items": "^2.1.2",
+    "neo-async": "^2.6.1",
+    "nyc": "^14.1.1",
+    "parallelize": "^3.0.1",
+    "pre-commit": "^1.2.2",
+    "standard": "^13.0.1",
+    "tape": "^4.11.0"
+  },
+  "dependencies": {
+    "reusify": "^1.0.4",
+    "xtend": "^4.0.2"
+  }
+}
diff --git a/mqtt-backend/node_modules/fastparallel/parallel.js b/mqtt-backend/node_modules/fastparallel/parallel.js
new file mode 100644
index 0000000..b551c05
--- /dev/null
+++ b/mqtt-backend/node_modules/fastparallel/parallel.js
@@ -0,0 +1,199 @@
+'use strict'
+
+var xtend = require('xtend')
+var reusify = require('reusify')
+var defaults = {
+  released: nop,
+  results: true
+}
+
+function fastparallel (options) {
+  options = xtend(defaults, options)
+
+  var released = options.released
+  var queue = reusify(options.results ? ResultsHolder : NoResultsHolder)
+  var queueSingleCaller = reusify(SingleCaller)
+  var goArray = options.results ? goResultsArray : goNoResultsArray
+  var goFunc = options.results ? goResultsFunc : goNoResultsFunc
+
+  return parallel
+
+  function parallel (that, toCall, arg, done) {
+    var holder = queue.get()
+    done = done || nop
+    if (toCall.length === 0) {
+      done.call(that)
+      released(holder)
+    } else {
+      holder._callback = done
+      holder._callThat = that
+      holder._release = release
+
+      if (typeof toCall === 'function') {
+        goFunc(that, toCall, arg, holder)
+      } else {
+        goArray(that, toCall, arg, holder)
+      }
+
+      if (holder._count === 0) {
+        holder.release()
+      }
+    }
+  }
+
+  function release (holder) {
+    queue.release(holder)
+    released(holder)
+  }
+
+  function singleCallerRelease (holder) {
+    queueSingleCaller.release(holder)
+  }
+
+  function goResultsFunc (that, toCall, arg, holder) {
+    var singleCaller = null
+    holder._count = arg.length
+    holder._results = new Array(holder._count)
+    for (var i = 0; i < arg.length; i++) {
+      singleCaller = queueSingleCaller.get()
+      singleCaller._release = singleCallerRelease
+      singleCaller.parent = holder
+      singleCaller.pos = i
+      if (that) {
+        toCall.call(that, arg[i], singleCaller.release)
+      } else {
+        toCall(arg[i], singleCaller.release)
+      }
+    }
+  }
+
+  function goResultsArray (that, funcs, arg, holder) {
+    var sc = null
+    var tc = nop
+    holder._count = funcs.length
+    holder._results = new Array(holder._count)
+    for (var i = 0; i < funcs.length; i++) {
+      sc = queueSingleCaller.get()
+      sc._release = singleCallerRelease
+      sc.parent = holder
+      sc.pos = i
+      tc = funcs[i]
+      if (that) {
+        if (tc.length === 1) tc.call(that, sc.release)
+        else tc.call(that, arg, sc.release)
+      } else {
+        if (tc.length === 1) tc(sc.release)
+        else tc(arg, sc.release)
+      }
+    }
+  }
+
+  function goNoResultsFunc (that, toCall, arg, holder) {
+    holder._count = arg.length
+    for (var i = 0; i < arg.length; i++) {
+      if (that) {
+        toCall.call(that, arg[i], holder.release)
+      } else {
+        toCall(arg[i], holder.release)
+      }
+    }
+  }
+
+  function goNoResultsArray (that, funcs, arg, holder) {
+    var toCall = null
+    holder._count = funcs.length
+    for (var i = 0; i < funcs.length; i++) {
+      toCall = funcs[i]
+      if (that) {
+        if (toCall.length === 1) {
+          toCall.call(that, holder.release)
+        } else {
+          toCall.call(that, arg, holder.release)
+        }
+      } else {
+        if (toCall.length === 1) {
+          toCall(holder.release)
+        } else {
+          toCall(arg, holder.release)
+        }
+      }
+    }
+  }
+}
+
+function NoResultsHolder () {
+  this._count = -1
+  this._callback = nop
+  this._callThat = null
+  this._release = null
+  this.next = null
+
+  var that = this
+  var i = 0
+  this.release = function () {
+    var cb = that._callback
+    if (++i === that._count || that._count === 0) {
+      if (that._callThat) {
+        cb.call(that._callThat)
+      } else {
+        cb()
+      }
+      that._callback = nop
+      that._callThat = null
+      i = 0
+      that._release(that)
+    }
+  }
+}
+
+function SingleCaller () {
+  this.pos = -1
+  this._release = nop
+  this.parent = null
+  this.next = null
+
+  var that = this
+  this.release = function (err, result) {
+    that.parent.release(err, that.pos, result)
+    that.pos = -1
+    that.parent = null
+    that._release(that)
+  }
+}
+
+function ResultsHolder () {
+  this._count = -1
+  this._callback = nop
+  this._results = null
+  this._err = null
+  this._callThat = null
+  this._release = nop
+  this.next = null
+
+  var that = this
+  var i = 0
+  this.release = function (err, pos, result) {
+    that._err = that._err || err
+    if (pos >= 0) {
+      that._results[pos] = result
+    }
+    var cb = that._callback
+    if (++i === that._count || that._count === 0) {
+      if (that._callThat) {
+        cb.call(that._callThat, that._err, that._results)
+      } else {
+        cb(that._err, that._results)
+      }
+      that._callback = nop
+      that._results = null
+      that._err = null
+      that._callThat = null
+      i = 0
+      that._release(that)
+    }
+  }
+}
+
+function nop () { }
+
+module.exports = fastparallel
diff --git a/mqtt-backend/node_modules/fastparallel/test.js b/mqtt-backend/node_modules/fastparallel/test.js
new file mode 100644
index 0000000..260b44a
--- /dev/null
+++ b/mqtt-backend/node_modules/fastparallel/test.js
@@ -0,0 +1,465 @@
+var test = require('tape')
+var parallel = require('./')
+
+test('basically works', function (t) {
+  t.plan(6)
+
+  var instance = parallel({
+    released: released
+  })
+  var count = 0
+  var obj = {}
+
+  instance(obj, [something, something], 42, function done () {
+    t.equal(count, 2, 'all functions must have completed')
+  })
+
+  function something (arg, cb) {
+    t.equal(obj, this)
+    t.equal(arg, 42)
+    setImmediate(function () {
+      count++
+      cb()
+    })
+  }
+
+  function released () {
+    t.pass('release')
+  }
+})
+
+test('accumulates results', function (t) {
+  t.plan(8)
+
+  var instance = parallel({
+    released: released
+  })
+  var count = 0
+  var obj = {}
+
+  instance(obj, [something, something], 42, function done (err, results) {
+    t.notOk(err, 'no error')
+    t.equal(count, 2, 'all functions must have completed')
+    t.deepEqual(results, [1, 2])
+  })
+
+  function something (arg, cb) {
+    t.equal(obj, this)
+    t.equal(arg, 42)
+    setImmediate(function () {
+      count++
+      cb(null, count)
+    })
+  }
+
+  function released () {
+    t.pass()
+  }
+})
+
+test('fowards errs', function (t) {
+  t.plan(3)
+
+  var instance = parallel({
+    released: released
+  })
+  var count = 0
+  var obj = {}
+
+  instance(obj, [somethingErr, something], 42, function done (err, results) {
+    t.ok(err)
+    t.equal(count, 2, 'all functions must have completed')
+  })
+
+  function something (arg, cb) {
+    setImmediate(function () {
+      count++
+      cb(null, count)
+    })
+  }
+
+  function somethingErr (arg, cb) {
+    setImmediate(function () {
+      count++
+      cb(new Error('this is an err!'))
+    })
+  }
+
+  function released () {
+    t.pass()
+  }
+})
+
+test('fowards errs (bis)', function (t) {
+  t.plan(3)
+
+  var instance = parallel({
+    released: released
+  })
+  var count = 0
+  var obj = {}
+
+  instance(obj, [something, somethingErr], 42, function done (err, results) {
+    t.ok(err)
+    t.equal(count, 2, 'all functions must have completed')
+  })
+
+  function something (arg, cb) {
+    setImmediate(function () {
+      count++
+      cb(null, count)
+    })
+  }
+
+  function somethingErr (arg, cb) {
+    setImmediate(function () {
+      count++
+      cb(new Error('this is an err!'))
+    })
+  }
+
+  function released () {
+    t.pass()
+  }
+})
+
+test('does not forward errors or result with results:false flag', function (t) {
+  t.plan(8)
+
+  var instance = parallel({
+    released: released,
+    results: false
+  })
+  var count = 0
+  var obj = {}
+
+  instance(obj, [something, something], 42, function done (err, results) {
+    t.equal(err, undefined, 'no err')
+    t.equal(results, undefined, 'no err')
+    t.equal(count, 2, 'all functions must have completed')
+  })
+
+  function something (arg, cb) {
+    t.equal(obj, this)
+    t.equal(arg, 42)
+    setImmediate(function () {
+      count++
+      cb()
+    })
+  }
+
+  function released () {
+    t.pass()
+  }
+})
+
+test('should call done and released if an empty is passed', function (t) {
+  t.plan(2)
+
+  var instance = parallel({
+    released: released
+  })
+  var obj = {}
+
+  instance(obj, [], 42, function done () {
+    t.pass()
+  })
+
+  function released () {
+    t.pass()
+  }
+})
+
+test('each support', function (t) {
+  t.plan(8)
+
+  var instance = parallel({
+    released: released
+  })
+  var count = 0
+  var obj = {}
+  var args = [1, 2, 3]
+  var i = 0
+
+  instance(obj, something, args, function done () {
+    t.equal(count, 3, 'all functions must have completed')
+  })
+
+  function something (arg, cb) {
+    t.equal(obj, this, 'this matches')
+    t.equal(args[i++], arg, 'the arg is correct')
+    setImmediate(function () {
+      count++
+      cb()
+    })
+  }
+
+  function released () {
+    t.pass()
+  }
+})
+
+test('call the callback with the given this', function (t) {
+  t.plan(1)
+
+  var instance = parallel()
+  var obj = {}
+
+  instance(obj, [build(), build()], 42, function done () {
+    t.equal(obj, this, 'this matches')
+  })
+
+  function build () {
+    return function something (arg, cb) {
+      setImmediate(cb)
+    }
+  }
+})
+
+test('call the callback with the given this with no results', function (t) {
+  t.plan(1)
+
+  var instance = parallel({ results: false })
+  var obj = {}
+
+  instance(obj, [build(), build()], 42, function done () {
+    t.equal(obj, this, 'this matches')
+  })
+
+  function build () {
+    return function something (arg, cb) {
+      setImmediate(cb)
+    }
+  }
+})
+
+test('call the callback with the given this with no data', function (t) {
+  t.plan(1)
+
+  var instance = parallel()
+  var obj = {}
+
+  instance(obj, [], 42, function done () {
+    t.equal(obj, this, 'this matches')
+  })
+})
+
+test('call the result callback when the each array is empty', function (t) {
+  t.plan(1)
+
+  var instance = parallel()
+  var obj = {}
+
+  instance(obj, something, [], function done () {
+    t.pass('the result function has been called')
+  })
+
+  function something (arg, cb) {
+    t.error('this should never be called')
+  }
+})
+
+test('call the result callback when the each array is empty with no results', function (t) {
+  t.plan(1)
+
+  var instance = parallel({ results: false })
+  var obj = {}
+
+  instance(obj, something, [], function done () {
+    t.pass('the result function has been called')
+  })
+
+  function something (arg, cb) {
+    t.error('this should never be called')
+  }
+})
+
+test('does not require a done callback', function (t) {
+  t.plan(4)
+
+  var instance = parallel()
+  var obj = {}
+
+  instance(obj, [something, something], 42)
+
+  function something (arg, cb) {
+    t.equal(obj, this)
+    t.equal(arg, 42)
+    setImmediate(cb)
+  }
+})
+
+test('works with sync functions with no results', function (t) {
+  t.plan(6)
+
+  var instance = parallel({
+    results: false,
+    released: released
+  })
+  var count = 0
+  var obj = {}
+
+  instance(obj, [something, something], 42, function done () {
+    t.equal(2, count, 'all functions must have completed')
+  })
+
+  function something (arg, cb) {
+    t.equal(this, obj)
+    t.equal(42, arg)
+    count++
+    cb()
+  }
+
+  function released () {
+    t.pass('release')
+  }
+})
+
+test('accumulates results in order', function (t) {
+  t.plan(8)
+
+  var instance = parallel({
+    released: released
+  })
+  var count = 2
+  var obj = {}
+
+  instance(obj, [something, something], 42, function done (err, results) {
+    t.notOk(err, 'no error')
+    t.equal(count, 0, 'all functions must have completed')
+    t.deepEqual(results, [2, 1])
+  })
+
+  function something (arg, cb) {
+    t.equal(obj, this)
+    t.equal(arg, 42)
+    var value = count--
+    setTimeout(function () {
+      cb(null, value)
+    }, 10 * value)
+  }
+
+  function released () {
+    t.pass()
+  }
+})
+
+test('call without arg if there is no arg with no results', function (t) {
+  t.plan(3)
+
+  var instance = parallel({
+    results: false
+  })
+  var count = 0
+  var obj = {}
+
+  instance(obj, [something, something], 42, function done () {
+    t.equal(count, 2, 'all functions must have completed')
+  })
+
+  function something (cb) {
+    t.equal(obj, this)
+    setImmediate(function () {
+      count++
+      cb()
+    })
+  }
+})
+
+test('call without arg if there is no arg with results', function (t) {
+  t.plan(3)
+
+  var instance = parallel()
+  var count = 0
+  var obj = {}
+
+  instance(obj, [something, something], 42, function done () {
+    t.equal(count, 2, 'all functions must have completed')
+  })
+
+  function something (cb) {
+    t.equal(obj, this)
+    setImmediate(function () {
+      count++
+      cb()
+    })
+  }
+})
+
+test('each support with nothing to process', function (t) {
+  t.plan(2)
+
+  var instance = parallel()
+  var obj = {}
+  var args = []
+
+  instance(obj, something, args, function done (err, results) {
+    t.error(err)
+    t.deepEqual(results, [], 'empty results')
+  })
+
+  function something (arg, cb) {
+    t.fail('this should never happen')
+  }
+})
+
+test('each without results support with nothing to process', function (t) {
+  t.plan(1)
+
+  var instance = parallel({ results: false })
+  var obj = {}
+  var args = []
+
+  instance(obj, something, args, function done () {
+    t.pass('done called')
+  })
+
+  function something (arg, cb) {
+    t.fail('this should never happen')
+  }
+})
+
+test('each works with arrays of objects', function (t) {
+  t.plan(3)
+
+  var instance = parallel({ results: false })
+  var obj = {}
+  var args = [{ val: true }, { val: true }]
+
+  instance(obj, something, args, function () {
+    t.ok('done called')
+  })
+
+  function something (arg, cb) {
+    t.ok(arg.val)
+    cb()
+  }
+})
+
+test('using same instance multiple times clears the state of result holder', function (t) {
+  var total = 10
+  t.plan(total)
+
+  var instance = parallel({
+    results: false,
+    released: released
+  })
+  var obj = {}
+  var count = 0
+
+  function released () {
+    if (count < total) {
+      instance(obj, [something], 42, function done () {
+        t.ok(true, 'done is called')
+        count++
+      })
+    }
+  }
+
+  released()
+  function something (cb) {
+    setImmediate(function () {
+      cb()
+    })
+  }
+})
diff --git a/mqtt-backend/node_modules/fastseries/.github/workflows/ci.yml b/mqtt-backend/node_modules/fastseries/.github/workflows/ci.yml
new file mode 100644
index 0000000..36a65d0
--- /dev/null
+++ b/mqtt-backend/node_modules/fastseries/.github/workflows/ci.yml
@@ -0,0 +1,43 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [10.x, 12.x, 13.x]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Run tests
+        run: |
+          npm run test
+
+      - name: Coveralls Parallel
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.github_token }}
+          parallel: true
+
+  coverage:
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Coveralls Finished
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+          parallel-finished: true
diff --git a/mqtt-backend/node_modules/fastseries/LICENSE b/mqtt-backend/node_modules/fastseries/LICENSE
new file mode 100644
index 0000000..0b14824
--- /dev/null
+++ b/mqtt-backend/node_modules/fastseries/LICENSE
@@ -0,0 +1,14 @@
+Copyright (c) 2015, Matteo Collina <matteo.collina@gmail.com>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
diff --git a/mqtt-backend/node_modules/fastseries/README.md b/mqtt-backend/node_modules/fastseries/README.md
new file mode 100644
index 0000000..52aef09
--- /dev/null
+++ b/mqtt-backend/node_modules/fastseries/README.md
@@ -0,0 +1,115 @@
+# fastseries
+
+![ci][ci-url]
+[![npm version][npm-badge]][npm-url]
+[![Coverage Status][coveralls-badge]][coveralls-url]
+[![Dependency Status][david-badge]][david-url]
+
+Zero-overhead series function call for node.js.
+Also supports `each` and `map`!
+
+If you need zero-overhead parallel function call, check out
+[fastparallel](http://npm.im/fastparallel).
+
+[![js-standard-style](https://raw.githubusercontent.com/feross/standard/master/badge.png)](https://github.com/feross/standard)
+
+## Example for series call
+
+```js
+var series = require('fastseries')({
+  // if you want the results, then here you are
+  results: true
+})
+
+series(
+  {}, // what will be this in the functions
+  [something, something, something], // functions to call
+  42, // the first argument of the functions
+  done // the function to be called when the series ends
+)
+
+function late (arg, cb) {
+  console.log('finishing', arg)
+  cb(null, 'myresult-' + arg)
+}
+
+function something (arg, cb) {
+  setTimeout(late, 1000, arg, cb)
+}
+
+function done (err, results) {
+  console.log('series completed, results:', results)
+}
+```
+
+## Example for each and map calls
+
+```js
+var series = require('fastseries')({
+  // if you want the results, then here you are
+  // passing false disables map
+  results: true
+})
+
+series(
+  {}, // what will be this in the functions
+  something, // functions to call
+  [1, 2, 3], // the first argument of the functions
+  done // the function to be called when the series ends
+)
+
+function late (arg, cb) {
+  console.log('finishing', arg)
+  cb(null, 'myresult-' + arg)
+}
+
+function something (arg, cb) {
+  setTimeout(late, 1000, arg, cb)
+}
+
+function done (err, results) {
+  console.log('series completed, results:', results)
+}
+```
+
+## Caveats
+
+The `done` function will be called only once, even if more than one error happen.
+
+This library works by caching the latest used function, so that running a new series
+does not cause **any memory allocations**.
+
+## Benchmarks
+
+Benchmark for doing 3 calls `setImmediate` 1 million times:
+
+```
+benchSetImmediate*1000000: 2460.623ms
+benchAsyncSeries*1000000: 3064.569ms
+benchAsyncEachSeries*1000000: 2913.525ms
+benchAsyncMapSeries*1000000: 3020.794ms
+benchNeoSeries*1000000: 2617.064ms
+benchNeoEachSeries*1000000: 2621.672ms
+benchNeoMapSeries*1000000: 2611.294ms
+benchTinyEachAsync*1000000: 2706.457ms
+benchFastSeries*1000000: 2540.653ms
+benchFastSeriesNoResults*1000000: 2538.674ms
+benchFastSeriesEach*1000000: 2534.856ms
+benchFastSeriesEachResults*1000000: 2545.394ms
+```
+
+Benchmarks taken on Node 12.16.1 on a dedicated server.
+
+See [bench.js](./bench.js) for mode details.
+
+## License
+
+ISC
+
+[ci-url]: https://github.com/mcollina/fastseries/workflows/ci/badge.svg
+[npm-badge]: https://badge.fury.io/js/fastseries.svg
+[npm-url]: https://badge.fury.io/js/fastseries
+[coveralls-badge]:https://coveralls.io/repos/mcollina/fastseries/badge.svg?branch=master&service=github
+[coveralls-url]: https://coveralls.io/github/mcollina/fastseries?branch=master
+[david-badge]: https://david-dm.org/mcollina/fastseries.svg
+[david-url]: https://david-dm.org/mcollina/fastseries
diff --git a/mqtt-backend/node_modules/fastseries/bench.js b/mqtt-backend/node_modules/fastseries/bench.js
new file mode 100644
index 0000000..7cf9eca
--- /dev/null
+++ b/mqtt-backend/node_modules/fastseries/bench.js
@@ -0,0 +1,94 @@
+var max = 1000000
+var series = require('./')()
+var seriesNoResults = require('./')({ results: false })
+var async = require('async')
+var neo = require('neo-async')
+var bench = require('fastbench')
+var tinyEachAsync = require('tiny-each-async')
+
+function benchFastSeries (done) {
+  series(null, [somethingP, somethingP, somethingP], 42, done)
+}
+
+function benchFastSeriesNoResults (done) {
+  seriesNoResults(null, [somethingP, somethingP, somethingP], 42, done)
+}
+
+function benchFastSeriesEach (done) {
+  seriesNoResults(null, somethingP, [1, 2, 3], done)
+}
+
+function benchFastSeriesEachResults (done) {
+  series(null, somethingP, [1, 2, 3], done)
+}
+
+function benchAsyncSeries (done) {
+  async.series([somethingA, somethingA, somethingA], done)
+}
+
+function benchAsyncEachSeries (done) {
+  async.eachSeries([1, 2, 3], somethingP, done)
+}
+
+function benchAsyncMapSeries (done) {
+  async.mapSeries([1, 2, 3], somethingP, done)
+}
+
+function benchNeoSeries (done) {
+  neo.series([somethingA, somethingA, somethingA], done)
+}
+
+function benchNeoEachSeries (done) {
+  neo.eachSeries([1, 2, 3], somethingP, done)
+}
+
+function benchNeoMapSeries (done) {
+  neo.mapSeries([1, 2, 3], somethingP, done)
+}
+
+function benchTinyEachAsync (done) {
+  tinyEachAsync([1, 2, 3], 1, somethingP, done)
+}
+
+var nextDone
+var nextCount
+
+function benchSetImmediate (done) {
+  nextCount = 3
+  nextDone = done
+  setImmediate(somethingImmediate)
+}
+
+function somethingImmediate () {
+  nextCount--
+  if (nextCount === 0) {
+    nextDone()
+  } else {
+    setImmediate(somethingImmediate)
+  }
+}
+
+function somethingP (arg, cb) {
+  setImmediate(cb)
+}
+
+function somethingA (cb) {
+  setImmediate(cb)
+}
+
+var run = bench([
+  benchSetImmediate,
+  benchAsyncSeries,
+  benchAsyncEachSeries,
+  benchAsyncMapSeries,
+  benchNeoSeries,
+  benchNeoEachSeries,
+  benchNeoMapSeries,
+  benchTinyEachAsync,
+  benchFastSeries,
+  benchFastSeriesNoResults,
+  benchFastSeriesEach,
+  benchFastSeriesEachResults
+], max)
+
+run(run)
diff --git a/mqtt-backend/node_modules/fastseries/example.js b/mqtt-backend/node_modules/fastseries/example.js
new file mode 100644
index 0000000..9385137
--- /dev/null
+++ b/mqtt-backend/node_modules/fastseries/example.js
@@ -0,0 +1,45 @@
+var series = require('./')({
+  // this is a function that will be called
+  // when a series completes
+  released: completed,
+
+  // we want results and errors
+  // passing false will make it faster!
+  results: true
+})
+
+series(
+  {}, // what will be this in the functions
+  [something, something, something], // functions to call
+  42, // the first argument of the functions
+  next // the function to be called when the series ends
+)
+
+function late (arg, cb) {
+  console.log('finishing', arg)
+  cb(null, 'myresult-' + arg)
+}
+
+function something (arg, cb) {
+  setTimeout(late, 1000, arg, cb)
+}
+
+function next (err, results) {
+  if (err) {
+    // do something here!
+  }
+  console.log('series completed, results:', results)
+
+  series({}, something, [1, 2, 3], done)
+}
+
+function done (err, results) {
+  if (err) {
+    // do something here!
+  }
+  console.log('series completed, results:', results)
+}
+
+function completed () {
+  console.log('series completed!')
+}
diff --git a/mqtt-backend/node_modules/fastseries/package.json b/mqtt-backend/node_modules/fastseries/package.json
new file mode 100644
index 0000000..3c4e4a2
--- /dev/null
+++ b/mqtt-backend/node_modules/fastseries/package.json
@@ -0,0 +1,44 @@
+{
+  "name": "fastseries",
+  "version": "2.0.0",
+  "description": "Zero-overhead asynchronous series/each/map function calls",
+  "main": "series.js",
+  "scripts": {
+    "lint": "standard --verbose | snazzy",
+    "unit": "tape test.js",
+    "unit:report": "nyc --reporter=html --reporter=cobertura --reporter=text tape test.js",
+    "unit:cov": "nyc --reporter=lcovonly tape test.js",
+    "cov": "nyc --reporter=text tape test.js",
+    "test:report": "npm run lint && npm run unit:report",
+    "test": "npm run lint && npm run unit:cov"
+  },
+  "pre-commit": [
+    "test"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mcollina/fastseries.git"
+  },
+  "keywords": [
+    "series",
+    "fast",
+    "async"
+  ],
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/mcollina/fastseries/issues"
+  },
+  "homepage": "https://github.com/mcollina/fastseries",
+  "devDependencies": {
+    "async": "^3.2.0",
+    "fastbench": "^1.0.1",
+    "neo-async": "^2.6.1",
+    "nyc": "^15.0.0",
+    "pre-commit": "^1.2.2",
+    "snazzy": "^8.0.0",
+    "standard": "^14.3.1",
+    "tape": "^4.13.0",
+    "tiny-each-async": "^2.0.3"
+  }
+}
diff --git a/mqtt-backend/node_modules/fastseries/series.js b/mqtt-backend/node_modules/fastseries/series.js
new file mode 100644
index 0000000..8872f3e
--- /dev/null
+++ b/mqtt-backend/node_modules/fastseries/series.js
@@ -0,0 +1,155 @@
+'use strict'
+
+var defaults = {
+  results: true
+}
+
+function fastseries (options) {
+  options = Object.assign({}, defaults, options)
+
+  var seriesEach
+  var seriesList
+
+  if (options.results) {
+    seriesEach = resultEach
+    seriesList = resultList
+  } else {
+    seriesEach = noResultEach
+    seriesList = noResultList
+  }
+
+  return series
+
+  function series (that, toCall, arg, done) {
+    done = (done || nop).bind(that)
+
+    if (toCall.length === 0) {
+      done.call(that)
+    } else if (toCall.bind) {
+      if (that) {
+        toCall = toCall.bind(that)
+      }
+      seriesEach(toCall, arg, done)
+    } else {
+      var _list
+      if (that) {
+        var length = toCall.length
+        _list = new Array(length)
+        for (var i = 0; i < length; i++) {
+          _list[i] = toCall[i].bind(that)
+        }
+      } else {
+        _list = toCall
+      }
+
+      seriesList(_list, arg, done)
+    }
+  }
+}
+
+function noResultEach (each, list, cb) {
+  var i = 0
+  var length = list.length
+
+  release()
+
+  function release () {
+    if (i < length) {
+      makeCallTwo(each, list[i++], release)
+    } else {
+      cb()
+    }
+  }
+}
+
+function noResultList (list, arg, cb) {
+  var i = 0
+  var length = list.length
+  var makeCall
+
+  if (list[0].length === 1) {
+    makeCall = makeCallOne
+  } else {
+    makeCall = makeCallTwo
+  }
+
+  release()
+
+  function release () {
+    if (i < length) {
+      makeCall(list[i++], arg, release)
+    } else {
+      cb()
+    }
+  }
+}
+
+function resultEach (each, list, cb) {
+  var i = 0
+  var length = list.length
+  var results = new Array(length)
+
+  release(null, null)
+
+  function release (err, result) {
+    if (err) {
+      cb(err)
+      return
+    }
+
+    if (i > 0) {
+      results[i - 1] = result
+    }
+
+    if (i < length) {
+      makeCallTwo(each, list[i++], release)
+    } else {
+      cb(null, results)
+    }
+  }
+}
+
+function resultList (list, arg, cb) {
+  var i = 0
+  var length = list.length
+  var makeCall
+
+  if (list[0].length === 1) {
+    makeCall = makeCallOne
+  } else {
+    makeCall = makeCallTwo
+  }
+
+  var results = new Array(length)
+
+  release(null, null)
+
+  function release (err, result) {
+    if (err) {
+      cb(err)
+      return
+    }
+
+    if (i > 0) {
+      results[i - 1] = result
+    }
+
+    if (i < length) {
+      makeCall(list[i++], arg, release)
+    } else {
+      cb(null, results)
+    }
+  }
+}
+
+function makeCallOne (cb, arg, release) {
+  cb(release)
+}
+
+function makeCallTwo (cb, arg, release) {
+  cb(arg, release)
+}
+
+function nop () { }
+
+module.exports = fastseries
diff --git a/mqtt-backend/node_modules/fastseries/test.js b/mqtt-backend/node_modules/fastseries/test.js
new file mode 100644
index 0000000..26beca4
--- /dev/null
+++ b/mqtt-backend/node_modules/fastseries/test.js
@@ -0,0 +1,368 @@
+'use strict'
+
+var test = require('tape')
+var series = require('./')
+
+test('basically works', function (t) {
+  t.plan(7)
+
+  var instance = series()
+  var count = 0
+  var obj = {}
+
+  instance(obj, [build(0), build(1)], 42, function done () {
+    t.equal(count, 2, 'all functions must have completed')
+  })
+
+  function build (expected) {
+    return function something (arg, cb) {
+      t.equal(obj, this)
+      t.equal(arg, 42)
+      t.equal(expected, count)
+      setImmediate(function () {
+        count++
+        cb()
+      })
+    }
+  }
+})
+
+test('without this', function (t) {
+  t.plan(7)
+
+  var instance = series()
+  var count = 0
+
+  instance(null, [build(0), build(1)], 42, function done () {
+    t.equal(count, 2, 'all functions must have completed')
+  })
+
+  function build (expected) {
+    return function something (arg, cb) {
+      t.equal(undefined, this)
+      t.equal(arg, 42)
+      t.equal(expected, count)
+      setImmediate(function () {
+        count++
+        cb()
+      })
+    }
+  }
+})
+
+test('accumulates results', function (t) {
+  t.plan(7)
+
+  var instance = series()
+  var count = 0
+  var obj = {}
+
+  instance(obj, [something, something], 42, function done (err, results) {
+    t.notOk(err, 'no error')
+    t.equal(count, 2, 'all functions must have completed')
+    t.deepEqual(results, [1, 2])
+  })
+
+  function something (arg, cb) {
+    t.equal(obj, this)
+    t.equal(arg, 42)
+    setImmediate(function () {
+      count++
+      cb(null, count)
+    })
+  }
+})
+
+test('fowards errs', function (t) {
+  t.plan(3)
+
+  var instance = series()
+  var count = 0
+  var obj = {}
+
+  instance(obj, [somethingErr, something], 42, function done (err, results) {
+    t.ok(err, 'error exists')
+    t.equal(err.message, 'this is an err!')
+    t.equal(count, 1, 'only the first function must have completed')
+  })
+
+  function something (arg, cb) {
+    setImmediate(function () {
+      count++
+      cb(null, count)
+    })
+  }
+
+  function somethingErr (arg, cb) {
+    setImmediate(function () {
+      count++
+      cb(new Error('this is an err!'))
+    })
+  }
+})
+
+test('does not forward errors or result with results:false flag', function (t) {
+  t.plan(7)
+
+  var instance = series({
+    results: false
+  })
+  var count = 0
+  var obj = {}
+
+  instance(obj, [something, something], 42, function done (err, results) {
+    t.equal(err, undefined, 'no err')
+    t.equal(results, undefined, 'no err')
+    t.equal(count, 2, 'all functions must have completed')
+  })
+
+  function something (arg, cb) {
+    t.equal(obj, this)
+    t.equal(arg, 42)
+    setImmediate(function () {
+      count++
+      cb()
+    })
+  }
+})
+
+test('should call done iff an empty is passed', function (t) {
+  t.plan(1)
+
+  var instance = series()
+  var obj = {}
+
+  instance(obj, [], 42, function done () {
+    t.pass()
+  })
+})
+
+test('each support', function (t) {
+  t.plan(7)
+
+  var instance = series()
+  var count = 0
+  var obj = {}
+  var args = [1, 2, 3]
+  var i = 0
+
+  instance(obj, something, [].concat(args), function done () {
+    t.equal(count, 3, 'all functions must have completed')
+  })
+
+  function something (arg, cb) {
+    t.equal(obj, this, 'this matches')
+    t.equal(args[i++], arg, 'the arg is correct')
+    setImmediate(function () {
+      count++
+      cb()
+    })
+  }
+})
+
+test('each errors', function (t) {
+  t.plan(2)
+
+  var instance = series()
+  var obj = {}
+  var args = [1, 2, 3]
+  var err = new Error('kaboom')
+
+  instance(obj, something, [].concat(args), function done (_err) {
+    t.equal(err, _err)
+  })
+
+  function something (arg, cb) {
+    t.pass('something called')
+    cb(err)
+  }
+})
+
+test('each without this', function (t) {
+  t.plan(7)
+
+  var instance = series()
+  var count = 0
+  var args = [1, 2, 3]
+  var i = 0
+
+  instance(null, something, [].concat(args), function done () {
+    t.equal(count, 3, 'all functions must have completed')
+  })
+
+  function something (arg, cb) {
+    t.equal(undefined, this, 'this matches')
+    t.equal(args[i++], arg, 'the arg is correct')
+    setImmediate(function () {
+      count++
+      cb()
+    })
+  }
+})
+
+test('call the callback with the given this', function (t) {
+  t.plan(1)
+
+  var instance = series()
+  var obj = {}
+
+  instance(obj, [build(), build()], 42, function done () {
+    t.equal(obj, this, 'this matches')
+  })
+
+  function build () {
+    return function something (arg, cb) {
+      setImmediate(cb)
+    }
+  }
+})
+
+test('call the callback with the given this with no results', function (t) {
+  t.plan(1)
+
+  var instance = series({ results: false })
+  var obj = {}
+
+  instance(obj, [build(), build()], 42, function done () {
+    t.equal(obj, this, 'this matches')
+  })
+
+  function build () {
+    return function something (arg, cb) {
+      setImmediate(cb)
+    }
+  }
+})
+
+test('call the callback with the given this with no data', function (t) {
+  t.plan(1)
+
+  var instance = series()
+  var obj = {}
+
+  instance(obj, [], 42, function done () {
+    t.equal(obj, this, 'this matches')
+  })
+})
+
+test('support no final callback', function (t) {
+  t.plan(6)
+
+  var instance = series()
+  var count = 0
+  var obj = {}
+
+  instance(obj, [build(0), build(1)], 42)
+
+  function build (expected) {
+    return function something (arg, cb) {
+      t.equal(obj, this)
+      t.equal(arg, 42)
+      t.equal(expected, count)
+      setImmediate(function () {
+        count++
+        cb()
+      })
+    }
+  }
+})
+
+test('call without arg if there is no arg with no results', function (t) {
+  t.plan(3)
+
+  var instance = series({
+    results: false
+  })
+  var count = 0
+  var obj = {}
+
+  instance(obj, [something, something], 42, function done () {
+    t.equal(count, 2, 'all functions must have completed')
+  })
+
+  function something (cb) {
+    t.equal(obj, this)
+    setImmediate(function () {
+      count++
+      cb()
+    })
+  }
+})
+
+test('call without arg if there is no arg with results', function (t) {
+  t.plan(3)
+
+  var instance = series()
+  var count = 0
+  var obj = {}
+
+  instance(obj, [something, something], 42, function done () {
+    t.equal(count, 2, 'all functions must have completed')
+  })
+
+  function something (cb) {
+    t.equal(obj, this)
+    setImmediate(function () {
+      count++
+      cb()
+    })
+  }
+})
+
+test('each support with nothing to process', function (t) {
+  t.plan(2)
+
+  var instance = series()
+  var obj = {}
+  var args = []
+
+  instance(obj, something, args, function done (err, results) {
+    t.error(err)
+    t.deepEqual(results, [], 'empty results')
+  })
+
+  function something (arg, cb) {
+    t.fail('this should never happen')
+  }
+})
+
+test('each without results support with nothing to process', function (t) {
+  t.plan(1)
+
+  var instance = series({ results: false })
+  var obj = {}
+  var args = []
+
+  instance(obj, something, args, function done () {
+    t.pass('done called')
+  })
+
+  function something (arg, cb) {
+    t.fail('this should never happen')
+  }
+})
+
+test('each without results', function (t) {
+  t.plan(7)
+
+  var instance = series({
+    results: false
+  })
+  var count = 0
+  var obj = {}
+  var args = [1, 2, 3]
+  var i = 0
+
+  instance(obj, something, [].concat(args), function done () {
+    t.equal(count, 3, 'all functions must have completed')
+  })
+
+  function something (arg, cb) {
+    t.equal(obj, this, 'this matches')
+    t.equal(args[i++], arg, 'the arg is correct')
+    setImmediate(function () {
+      count++
+      cb()
+    })
+  }
+})
diff --git a/mqtt-backend/node_modules/help-me/.github/workflows/ci.yml b/mqtt-backend/node_modules/help-me/.github/workflows/ci.yml
new file mode 100644
index 0000000..f7f7cc5
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/.github/workflows/ci.yml
@@ -0,0 +1,28 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+        node-version: [14.x, 16.x, 18.x, 20.x]
+
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Use Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Run tests
+        run: |
+          npm run test
diff --git a/mqtt-backend/node_modules/help-me/LICENSE b/mqtt-backend/node_modules/help-me/LICENSE
new file mode 100644
index 0000000..bc090c0
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2022 Matteo Collina
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
diff --git a/mqtt-backend/node_modules/help-me/README.md b/mqtt-backend/node_modules/help-me/README.md
new file mode 100644
index 0000000..c0c55c8
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/README.md
@@ -0,0 +1,66 @@
+help-me
+=======
+
+Help command for node, to use with [minimist](http://npm.im/minimist) and [commist](http://npm.im/commist).
+
+Example
+-------
+
+```js
+'use strict'
+
+var helpMe = require('help-me')
+var path = require('path')
+var help = helpMe({
+  dir: path.join(__dirname, 'doc'),
+  // the default
+  ext: '.txt'
+})
+
+help
+  .createStream(['hello']) // can support also strings
+  .pipe(process.stdout)
+
+// little helper to do the same
+help.toStdout(['hello'])
+```
+
+Using ESM and top-level await::
+
+```js
+import { help } from 'help-me'
+import { join } from 'desm'
+
+await help({
+  dir: join(import.meta.url, 'doc'),
+  // the default
+  ext: '.txt'
+}, ['hello'])
+```
+
+Usage with commist
+------------------
+
+[Commist](http://npm.im/commist) provide a command system for node.
+
+```js
+var commist = require('commist')()
+var path = require('path')
+var help = require('help-me')({
+  dir: path.join(__dirname, 'doc')
+})
+
+commist.register('help', help.toStdout)
+
+commist.parse(process.argv.splice(2))
+```
+
+Acknowledgements
+----------------
+
+This project was kindly sponsored by [nearForm](http://nearform.com).
+
+License
+-------
+
+MIT
diff --git a/mqtt-backend/node_modules/help-me/doc/hello.txt b/mqtt-backend/node_modules/help-me/doc/hello.txt
new file mode 100644
index 0000000..b2e26f8
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/doc/hello.txt
@@ -0,0 +1 @@
+this is hello world
diff --git a/mqtt-backend/node_modules/help-me/doc/help.txt b/mqtt-backend/node_modules/help-me/doc/help.txt
new file mode 100644
index 0000000..5812ea8
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/doc/help.txt
@@ -0,0 +1,5 @@
+HELP-ME by Matteo
+
+* start     starts a script
+* help      shows help
+
diff --git a/mqtt-backend/node_modules/help-me/example.js b/mqtt-backend/node_modules/help-me/example.js
new file mode 100644
index 0000000..ad22a4a
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/example.js
@@ -0,0 +1,18 @@
+'use strict'
+
+const path = require('path')
+const commist = require('commist')()
+const help = require('./')({
+  dir: path.join(path.dirname(require.main.filename), 'doc')
+})
+
+commist.register('help', help.toStdout)
+commist.register('start', function () {
+  console.log('Starting the script!')
+})
+
+const res = commist.parse(process.argv.splice(2))
+
+if (res) {
+  help.toStdout()
+}
diff --git a/mqtt-backend/node_modules/help-me/fixture/basic/hello.txt b/mqtt-backend/node_modules/help-me/fixture/basic/hello.txt
new file mode 100644
index 0000000..8f43ac9
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/fixture/basic/hello.txt
@@ -0,0 +1 @@
+ahdsadhdash
diff --git a/mqtt-backend/node_modules/help-me/fixture/basic/help.txt b/mqtt-backend/node_modules/help-me/fixture/basic/help.txt
new file mode 100644
index 0000000..3b18e51
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/fixture/basic/help.txt
@@ -0,0 +1 @@
+hello world
diff --git a/mqtt-backend/node_modules/help-me/fixture/dir/a/b.txt b/mqtt-backend/node_modules/help-me/fixture/dir/a/b.txt
new file mode 100644
index 0000000..e69de29
diff --git a/mqtt-backend/node_modules/help-me/fixture/no-ext/hello b/mqtt-backend/node_modules/help-me/fixture/no-ext/hello
new file mode 100644
index 0000000..c91d514
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/fixture/no-ext/hello
@@ -0,0 +1 @@
+ghghghhg
diff --git a/mqtt-backend/node_modules/help-me/fixture/sameprefix/hello world.txt b/mqtt-backend/node_modules/help-me/fixture/sameprefix/hello world.txt
new file mode 100644
index 0000000..95d09f2
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/fixture/sameprefix/hello world.txt	
@@ -0,0 +1 @@
+hello world
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/help-me/fixture/sameprefix/hello.txt b/mqtt-backend/node_modules/help-me/fixture/sameprefix/hello.txt
new file mode 100644
index 0000000..b6fc4c6
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/fixture/sameprefix/hello.txt
@@ -0,0 +1 @@
+hello
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/help-me/fixture/shortnames/abcde fghi lmno.txt b/mqtt-backend/node_modules/help-me/fixture/shortnames/abcde fghi lmno.txt
new file mode 100644
index 0000000..509318c
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/fixture/shortnames/abcde fghi lmno.txt	
@@ -0,0 +1 @@
+ewweqjewqjewqj
diff --git a/mqtt-backend/node_modules/help-me/fixture/shortnames/abcde hello.txt b/mqtt-backend/node_modules/help-me/fixture/shortnames/abcde hello.txt
new file mode 100644
index 0000000..4022537
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/fixture/shortnames/abcde hello.txt	
@@ -0,0 +1 @@
+45678
diff --git a/mqtt-backend/node_modules/help-me/fixture/shortnames/hello world.txt b/mqtt-backend/node_modules/help-me/fixture/shortnames/hello world.txt
new file mode 100644
index 0000000..e56e15b
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/fixture/shortnames/hello world.txt	
@@ -0,0 +1 @@
+12345
diff --git a/mqtt-backend/node_modules/help-me/help-me.js b/mqtt-backend/node_modules/help-me/help-me.js
new file mode 100644
index 0000000..6a52bf0
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/help-me.js
@@ -0,0 +1,134 @@
+'use strict'
+
+const fs = require('fs')
+const { PassThrough, Writable, pipeline } = require('stream')
+const process = require('process')
+const { join } = require('path')
+
+const defaults = {
+  ext: '.txt',
+  help: 'help'
+}
+
+function isDirectory (path) {
+  try {
+    const stat = fs.lstatSync(path)
+    return stat.isDirectory()
+  } catch (err) {
+    return false
+  }
+}
+
+function createDefaultStream () {
+  return new Writable({
+    write (chunk, encoding, callback) {
+      process.stdout.write(chunk, callback)
+    }
+  })
+}
+
+function helpMe (opts) {
+  opts = Object.assign({}, defaults, opts)
+
+  if (!opts.dir) {
+    throw new Error('missing dir')
+  }
+
+  if (!isDirectory(opts.dir)) {
+    throw new Error(`${opts.dir} is not a directory`)
+  }
+
+  return {
+    createStream: createStream,
+    toStdout: toStdout
+  }
+
+  function createStream (args) {
+    if (typeof args === 'string') {
+      args = args.split(' ')
+    } else if (!args || args.length === 0) {
+      args = [opts.help]
+    }
+
+    const out = new PassThrough()
+    const re = new RegExp(
+      args
+        .map(function (arg) {
+          return arg + '[a-zA-Z0-9]*'
+        })
+        .join('[ /]+')
+    )
+
+    if (process.platform === 'win32') {
+      opts.dir = opts.dir.split('\\').join('/')
+    }
+
+    fs.readdir(opts.dir, function (err, files) {
+      if (err) return out.emit('error', err)
+
+      const regexp = new RegExp('.*' + opts.ext + '$')
+      files = files
+        .filter(function (file) {
+          const matched = file.match(regexp)
+          return !!matched
+        })
+        .map(function (relative) {
+          return { file: join(opts.dir, relative), relative }
+        })
+        .filter(function (file) {
+          return file.relative.match(re)
+        })
+
+      if (files.length === 0) {
+        return out.emit('error', new Error('no such help file'))
+      } else if (files.length > 1) {
+        const exactMatch = files.find(
+          (file) => file.relative === `${args[0]}${opts.ext}`
+        )
+        if (!exactMatch) {
+          out.write('There are ' + files.length + ' help pages ')
+          out.write('that matches the given request, please disambiguate:\n')
+          files.forEach(function (file) {
+            out.write('  * ')
+            out.write(file.relative.replace(opts.ext, ''))
+            out.write('\n')
+          })
+          out.end()
+          return
+        }
+        files = [exactMatch]
+      }
+
+      pipeline(fs.createReadStream(files[0].file), out, () => {})
+    })
+
+    return out
+  }
+
+  function toStdout (args = [], opts) {
+    opts = opts || {}
+    const stream = opts.stream || createDefaultStream()
+    const _onMissingHelp = opts.onMissingHelp || onMissingHelp
+    return new Promise((resolve, reject) => {
+      createStream(args)
+        .on('error', (err) => {
+          _onMissingHelp(err, args, stream).then(resolve, reject)
+        })
+        .pipe(stream)
+        .on('close', resolve)
+        .on('end', resolve)
+    })
+  }
+
+  function onMissingHelp (_, args, stream) {
+    stream.write(`no such help file: ${args.join(' ')}.\n\n`)
+    return toStdout([], { stream, async onMissingHelp () {} })
+  }
+}
+
+function help (opts, args) {
+  return helpMe(opts).toStdout(args, opts)
+}
+
+module.exports = helpMe
+module.exports.help = help
diff --git a/mqtt-backend/node_modules/help-me/package.json b/mqtt-backend/node_modules/help-me/package.json
new file mode 100644
index 0000000..7a44944
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/package.json
@@ -0,0 +1,36 @@
+{
+  "name": "help-me",
+  "version": "5.0.0",
+  "description": "Help command for node, partner of minimist and commist",
+  "main": "help-me.js",
+  "scripts": {
+    "test": "standard && node test.js | tap-spec"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mcollina/help-me.git"
+  },
+  "keywords": [
+    "help",
+    "command",
+    "minimist",
+    "commist"
+  ],
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mcollina/help-me/issues"
+  },
+  "homepage": "https://github.com/mcollina/help-me",
+  "devDependencies": {
+    "commist": "^2.0.0",
+    "concat-stream": "^2.0.0",
+    "pre-commit": "^1.1.3",
+    "proxyquire": "^2.1.3",
+    "standard": "^16.0.0",
+    "tap-spec": "^5.0.0",
+    "tape": "^5.0.0"
+  },
+  "dependencies": {
+  }
+}
diff --git a/mqtt-backend/node_modules/help-me/test.js b/mqtt-backend/node_modules/help-me/test.js
new file mode 100644
index 0000000..eca9b28
--- /dev/null
+++ b/mqtt-backend/node_modules/help-me/test.js
@@ -0,0 +1,316 @@
+'use strict'
+
+const test = require('tape')
+const concat = require('concat-stream')
+const fs = require('fs')
+const os = require('os')
+const path = require('path')
+const helpMe = require('./')
+const proxyquire = require('proxyquire')
+
+test('throws if no directory is passed', function (t) {
+  try {
+    helpMe()
+    t.fail()
+  } catch (err) {
+    t.equal(err.message, 'missing dir')
+  }
+  t.end()
+})
+
+test('throws if a normal file is passed', function (t) {
+  try {
+    helpMe({
+      dir: __filename
+    })
+    t.fail()
+  } catch (err) {
+    t.equal(err.message, `${__filename} is not a directory`)
+  }
+  t.end()
+})
+
+test('throws if the directory cannot be accessed', function (t) {
+  try {
+    helpMe({
+      dir: './foo'
+    })
+    t.fail()
+  } catch (err) {
+    t.equal(err.message, './foo is not a directory')
+  }
+  t.end()
+})
+
+test('show a generic help.txt from a folder to a stream with relative path in dir', function (t) {
+  t.plan(2)
+
+  helpMe({
+    dir: 'fixture/basic'
+  }).createStream()
+    .pipe(concat(function (data) {
+      fs.readFile('fixture/basic/help.txt', function (err, expected) {
+        t.error(err)
+        t.equal(data.toString(), expected.toString())
+      })
+    }))
+})
+
+test('show a generic help.txt from a folder to a stream with absolute path in dir', function (t) {
+  t.plan(2)
+
+  helpMe({
+    dir: path.join(__dirname, 'fixture/basic')
+  }).createStream()
+    .pipe(concat(function (data) {
+      fs.readFile('fixture/basic/help.txt', function (err, expected) {
+        t.error(err)
+        t.equal(data.toString(), expected.toString())
+      })
+    }))
+})
+
+test('custom help command with an array', function (t) {
+  t.plan(2)
+
+  helpMe({
+    dir: 'fixture/basic'
+  }).createStream(['hello'])
+    .pipe(concat(function (data) {
+      fs.readFile('fixture/basic/hello.txt', function (err, expected) {
+        t.error(err)
+        t.equal(data.toString(), expected.toString())
+      })
+    }))
+})
+
+test('custom help command without an ext', function (t) {
+  t.plan(2)
+
+  helpMe({
+    dir: 'fixture/no-ext',
+    ext: ''
+  }).createStream(['hello'])
+    .pipe(concat(function (data) {
+      fs.readFile('fixture/no-ext/hello', function (err, expected) {
+        t.error(err)
+        t.equal(data.toString(), expected.toString())
+      })
+    }))
+})
+
+test('custom help command with a string', function (t) {
+  t.plan(2)
+
+  helpMe({
+    dir: 'fixture/basic'
+  }).createStream('hello')
+    .pipe(concat(function (data) {
+      fs.readFile('fixture/basic/hello.txt', function (err, expected) {
+        t.error(err)
+        t.equal(data.toString(), expected.toString())
+      })
+    }))
+})
+
+test('missing help file', function (t) {
+  t.plan(1)
+
+  helpMe({
+    dir: 'fixture/basic'
+  }).createStream('abcde')
+    .on('error', function (err) {
+      t.equal(err.message, 'no such help file')
+    })
+    .resume()
+})
+
+test('custom help command with an array', function (t) {
+  const helper = helpMe({
+    dir: 'fixture/shortnames'
+  })
+
+  t.test('abbreviates two words in one', function (t) {
+    t.plan(2)
+
+    helper
+      .createStream(['world'])
+      .pipe(concat(function (data) {
+        fs.readFile('fixture/shortnames/hello world.txt', function (err, expected) {
+          t.error(err)
+          t.equal(data.toString(), expected.toString())
+        })
+      }))
+  })
+
+  t.test('abbreviates three words in two', function (t) {
+    t.plan(2)
+
+    helper
+      .createStream(['abcde', 'fghi'])
+      .pipe(concat(function (data) {
+        fs.readFile('fixture/shortnames/abcde fghi lmno.txt', function (err, expected) {
+          t.error(err)
+          t.equal(data.toString(), expected.toString())
+        })
+      }))
+  })
+
+  t.test('abbreviates a word', function (t) {
+    t.plan(2)
+
+    helper
+      .createStream(['abc', 'fg'])
+      .pipe(concat(function (data) {
+        fs.readFile('fixture/shortnames/abcde fghi lmno.txt', function (err, expected) {
+          t.error(err)
+          t.equal(data.toString(), expected.toString())
+        })
+      }))
+  })
+
+  t.test('abbreviates a word using strings', function (t) {
+    t.plan(2)
+
+    helper
+      .createStream('abc fg')
+      .pipe(concat(function (data) {
+        fs.readFile('fixture/shortnames/abcde fghi lmno.txt', function (err, expected) {
+          t.error(err)
+          t.equal(data.toString(), expected.toString())
+        })
+      }))
+  })
+
+  t.test('print a disambiguation', function (t) {
+    t.plan(1)
+
+    const expected = '' +
+      'There are 2 help pages that matches the given request, please disambiguate:\n' +
+      '  * abcde fghi lmno\n' +
+      '  * abcde hello\n'
+
+    helper
+      .createStream(['abc'])
+      .pipe(concat({ encoding: 'string' }, function (data) {
+        t.equal(data, expected)
+      }))
+  })
+
+  t.test('choose exact match over partial', function (t) {
+    t.plan(1)
+
+    helpMe({
+      dir: 'fixture/sameprefix'
+    }).createStream(['hello'])
+      .pipe(concat({ encoding: 'string' }, function (data) {
+        t.equal(data, 'hello')
+      }))
+  })
+})
+
+test('toStdout helper', async function (t) {
+  t.plan(2)
+
+  let completed = false
+  const stream = concat(function (data) {
+    completed = true
+    fs.readFile('fixture/basic/help.txt', function (err, expected) {
+      t.error(err)
+      t.equal(data.toString(), expected.toString())
+    })
+  })
+
+  await helpMe({
+    dir: 'fixture/basic'
+  }).toStdout([], { stream })
+
+  t.ok(completed)
+})
+
+test('handle error in toStdout', async function (t) {
+  t.plan(2)
+
+  let completed = false
+  const stream = concat(function (data) {
+    completed = true
+    fs.readFile('fixture/basic/help.txt', function (err, expected) {
+      t.error(err)
+      t.equal(data.toString(), 'no such help file: something.\n\n' + expected.toString())
+    })
+  })
+
+  await helpMe({
+    dir: 'fixture/basic'
+  }).toStdout(['something'], {
+    stream
+  })
+
+  t.ok(completed)
+})
+
+test('customize missing help fle message', async function (t) {
+  t.plan(3)
+
+  const stream = concat(function (data) {
+    t.equal(data.toString(), 'kaboom\n\n')
+  })
+
+  await helpMe({
+    dir: 'fixture/basic'
+  }).toStdout(['something'], {
+    stream,
+    async onMissingHelp (err, args, stream) {
+      t.equal(err.message, 'no such help file')
+      t.deepEquals(args, ['something'])
+      stream.end('kaboom\n\n')
+    }
+  })
+})
+
+test('toStdout without factory', async function (t) {
+  t.plan(2)
+
+  let completed = false
+  const stream = concat(function (data) {
+    completed = true
+    fs.readFile('fixture/basic/help.txt', function (err, expected) {
+      t.error(err)
+      t.equal(data.toString(), expected.toString())
+    })
+  })
+
+  await helpMe.help({
+    dir: 'fixture/basic',
+    stream
+  }, [])
+
+  t.ok(completed)
+})
+
+test('should allow for awaiting the response with default stdout stream', async function (t) {
+  t.plan(2)
+
+  const _process = Object.create(process)
+  const stdout = Object.create(process.stdout)
+  Object.defineProperty(_process, 'stdout', {
+    value: stdout
+  })
+
+  let completed = false
+  stdout.write = (data, cb) => {
+    t.equal(data.toString(), 'hello world' + os.EOL)
+    completed = true
+    cb()
+  }
+
+  const helpMe = proxyquire('./help-me', {
+    process: _process
+  })
+
+  await helpMe.help({
+    dir: 'fixture/basic'
+  })
+
+  t.ok(completed)
+})
diff --git a/mqtt-backend/node_modules/hyperid/LICENSE b/mqtt-backend/node_modules/hyperid/LICENSE
new file mode 100644
index 0000000..fe82216
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2016 Matteo Collina
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/hyperid/README.md b/mqtt-backend/node_modules/hyperid/README.md
new file mode 100644
index 0000000..ac61997
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/README.md
@@ -0,0 +1,98 @@
+# hyperid
+
+[![Build Status](https://img.shields.io/github/workflow/status/mcollina/hyperid/CI)](https://github.com/mcollina/hyperid/actions)
+
+Uber-fast unique id generation, for Node.js and the browser.
+Here are the benchmarks:
+
+```
+crypto.randomUUID x 12,969,725 ops/sec ±0.88% (91 runs sampled)
+hashids process.hrtime x 419,350 ops/sec ±0.66% (94 runs sampled)
+hashids counter x 819,049 ops/sec ±0.58% (93 runs sampled)
+shortid x 40,820 ops/sec ±2.49% (87 runs sampled)
+crypto.random x 372,773 ops/sec ±2.39% (84 runs sampled)
+nid x 1,614,450 ops/sec ±0.38% (93 runs sampled)
+uuid.v4 x 1,446,051 ops/sec ±0.60% (98 runs sampled)
+napiRsUuid.v4 x 8,676,151 ops/sec ±0.49% (97 runs sampled)
+uuid.v1 x 2,051,072 ops/sec ±0.15% (99 runs sampled)
+nanoid x 4,293,733 ops/sec ±0.31% (97 runs sampled)
+hyperid - variable length x 25,937,129 ops/sec ±1.48% (91 runs sampled)
+hyperid - fixed length x 24,970,478 ops/sec ±1.48% (92 runs sampled)
+hyperid - fixed length, url safe x 25,856,735 ops/sec ±1.93% (92 runs sampled)
+
+Fastest is hyperid - variable length,hyperid - fixed length, url safe
+Slowest is shortid
+```
+
+_Note:_ Benchmark run with Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz and Node.js v22.0.0
+
+As you can see the native `crypto.randomUUID` is almost as fast as hyperid
+on Node.js v16, but not on v14.
+
+## Install
+
+```
+npm i hyperid --save
+```
+
+## Example
+
+```js
+'use strict'
+
+const hyperid = require('hyperid')
+const instance = hyperid()
+
+const id = instance()
+
+console.log(id)
+console.log(instance())
+console.log(hyperid.decode(id))
+console.log(hyperid.decode(instance()))
+```
+
+## API
+
+### hyperid([fixedLength || options])
+
+Returns a function to generate unique ids.
+The function can accept one of the following parameters:
+- `fixedLength: Boolean`
+If *fixedLength* is `true` the function will always generate an id
+that is 33 characters in length, by default `fixedLength` is `false`.
+- `options: Object`
+If `{ fixedLength: true }` is passed in, the function will always generate an id
+that is 33 characters in length, by default `fixedLength` is `false`.
+If `{ urlSafe: true }` is passed in, the function will generate url safe ids according to RFC4648.
+If `{ startFrom: <int> }` is passed in, the first counter will start from that
+number, which must be between 0 and 2147483647. Fractions are discarded, only the
+integer part matters.
+If `{ maxInt: <int> }` is passed in, the uuid will be re-generated once the *maxInt* is reached. The lesser the *maxInt*, higher the performance because of SMI (a V8 optimization).
+
+### instance()
+
+Returns an unique id.
+
+### instance.uuid
+
+The uuid used to generate the ids, it will change over time.
+If `maxInt` is provided in options, then it will regenerated every `maxInt`, else it will be regenerated every `Math.pow(2, 31) - 1` to keep the integer a SMI (a V8 optimization). 
+
+### hyperid.decode(id, [options])
+
+Decode the unique id into its two components, a `uuid` and a counter.
+If you are generating *url safe* ids, you must pass `{ urlSafe: true }` as option.
+It returns:
+
+```js
+{
+  uuid: '049b7020-c787-41bf-a1d2-a97612c11418',
+  count: 1
+}
+```
+
+This is aliased as `instance.decode`.
+
+## License
+
+MIT
diff --git a/mqtt-backend/node_modules/hyperid/hyperid.js b/mqtt-backend/node_modules/hyperid/hyperid.js
new file mode 100644
index 0000000..a4584db
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/hyperid.js
@@ -0,0 +1,104 @@
+'use strict'
+
+const uuidv4 = require('./uuid-node')
+const parser = require('uuid-parse')
+const Buffer = loadBuffer()
+function loadBuffer () {
+  const b = require('buffer')
+  // use third party module if no buffer module
+  return b && b.Buffer
+    ? b.Buffer
+    : require('buffer/').Buffer
+}
+const base64Padding = Buffer.from('==', 'base64')
+
+function hyperid (opts) {
+  let fixedLength = false
+  let urlSafe = false
+  // gaurd if instantiated using boolean for fixedLength or with no args
+  let maxInt = Math.pow(2, 31) - 1
+  if (typeof opts === 'boolean') {
+    fixedLength = opts
+  } else {
+    opts = opts || {}
+    maxInt = opts.maxInt || Math.pow(2, 31) - 1
+    urlSafe = !!opts.urlSafe
+    fixedLength = !!opts.fixedLength
+  }
+
+  generate.uuid = uuidv4()
+  generate.decode = decode
+
+  let id = baseId(generate.uuid, urlSafe)
+  let count = Math.floor(opts.startFrom || 0)
+
+  if (isNaN(maxInt)) throw new Error(`maxInt must be a number. recieved ${opts.maxInt}`)
+
+  if (isNaN(count) || !(maxInt > count && count >= 0)) {
+    throw new Error([
+      `when passed, opts.startFrom must be a number between 0 and ${maxInt}.`,
+      'Only the integer part matters.',
+      `- got: ${opts.startFrom}`
+    ].join('\n'))
+  }
+
+  return generate
+
+  function generate () {
+    let result
+    if (count === maxInt) {
+      generate.uuid = uuidv4()
+      id = baseId(generate.uuid, urlSafe) // rebase
+      count = 0
+    }
+    if (fixedLength) {
+      result = id + `0000000000${count}`.slice(-10)
+    } else {
+      result = id + count
+    }
+    count = (count + 1) | 0
+    return result
+  }
+}
+
+function baseId (id, urlSafe) {
+  const base64Id = Buffer.concat([Buffer.from(parser.parse(id)), base64Padding]).toString('base64')
+  if (urlSafe) {
+    return base64Id.replace(/\+/g, '-').replace(/\//g, '_').replace(/=+$/, '-')
+  }
+  return base64Id.replace(/=+$/, '/')
+}
+
+function decode (id, opts) {
+  opts = opts || {}
+  const urlSafe = !!opts.urlSafe
+
+  if (urlSafe) {
+    id = id.replace(/-([^-]*)$/, '/' + '$1')
+      .replace(/-/g, '+')
+      .replace(/_/g, '/')
+  }
+
+  if (id.length < 22) {
+    return null
+  }
+  const lastSlashIndex = id.lastIndexOf('/')
+  if (lastSlashIndex === -1) {
+    return null
+  }
+  const uuidPart = id.substring(0, lastSlashIndex)
+  const countPart = Number(id.substring(lastSlashIndex + 1))
+  if (!uuidPart || isNaN(countPart)) {
+    return null
+  }
+
+  const result = {
+    uuid: parser.unparse(Buffer.from(uuidPart + '==', 'base64')),
+    count: countPart
+  }
+
+  return result
+}
+
+module.exports = hyperid
+module.exports.decode = decode
diff --git a/mqtt-backend/node_modules/hyperid/index.d.ts b/mqtt-backend/node_modules/hyperid/index.d.ts
new file mode 100644
index 0000000..273a5ef
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/index.d.ts
@@ -0,0 +1,27 @@
+declare function hyperid(opts?: boolean | hyperid.Options): hyperid.Instance
+
+declare namespace hyperid {
+  const decode: hyperid.decode
+
+  interface Options {
+    urlSafe?: boolean
+    fixedLength?: boolean
+    startFrom?: number
+    maxInt?: number
+  }
+
+  interface Instance {
+    (): string
+    decode: hyperid.decode
+    uuid: string
+  }
+
+  type decode = (id: string, opts?: hyperid.Options) => hyperid.IdObject
+
+  interface IdObject {
+    uuid: string
+    count: number
+  }
+}
+
+export = hyperid
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/.bin/uuid b/mqtt-backend/node_modules/hyperid/node_modules/.bin/uuid
new file mode 100644
index 0000000..0c2d469
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/.bin/uuid
@@ -0,0 +1,16 @@
+#!/bin/sh
+basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
+
+case `uname` in
+    *CYGWIN*|*MINGW*|*MSYS*)
+        if command -v cygpath > /dev/null 2>&1; then
+            basedir=`cygpath -w "$basedir"`
+        fi
+    ;;
+esac
+
+if [ -x "$basedir/node" ]; then
+  exec "$basedir/node"  "$basedir/../uuid/dist/bin/uuid" "$@"
+else 
+  exec node  "$basedir/../uuid/dist/bin/uuid" "$@"
+fi
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/.bin/uuid.cmd b/mqtt-backend/node_modules/hyperid/node_modules/.bin/uuid.cmd
new file mode 100644
index 0000000..0f2376e
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/.bin/uuid.cmd
@@ -0,0 +1,17 @@
+@ECHO off
+GOTO start
+:find_dp0
+SET dp0=%~dp0
+EXIT /b
+:start
+SETLOCAL
+CALL :find_dp0
+
+IF EXIST "%dp0%\node.exe" (
+  SET "_prog=%dp0%\node.exe"
+) ELSE (
+  SET "_prog=node"
+  SET PATHEXT=%PATHEXT:;.JS;=;%
+)
+
+endLocal & goto #_undefined_# 2>NUL || title %COMSPEC% & "%_prog%"  "%dp0%\..\uuid\dist\bin\uuid" %*
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/.bin/uuid.ps1 b/mqtt-backend/node_modules/hyperid/node_modules/.bin/uuid.ps1
new file mode 100644
index 0000000..7804628
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/.bin/uuid.ps1
@@ -0,0 +1,28 @@
+#!/usr/bin/env pwsh
+$basedir=Split-Path $MyInvocation.MyCommand.Definition -Parent
+
+$exe=""
+if ($PSVersionTable.PSVersion -lt "6.0" -or $IsWindows) {
+  # Fix case when both the Windows and Linux builds of Node
+  # are installed in the same directory
+  $exe=".exe"
+}
+$ret=0
+if (Test-Path "$basedir/node$exe") {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "$basedir/node$exe"  "$basedir/../uuid/dist/bin/uuid" $args
+  } else {
+    & "$basedir/node$exe"  "$basedir/../uuid/dist/bin/uuid" $args
+  }
+  $ret=$LASTEXITCODE
+} else {
+  # Support pipeline input
+  if ($MyInvocation.ExpectingInput) {
+    $input | & "node$exe"  "$basedir/../uuid/dist/bin/uuid" $args
+  } else {
+    & "node$exe"  "$basedir/../uuid/dist/bin/uuid" $args
+  }
+  $ret=$LASTEXITCODE
+}
+exit $ret
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/CHANGELOG.md b/mqtt-backend/node_modules/hyperid/node_modules/uuid/CHANGELOG.md
new file mode 100644
index 0000000..7519d19
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/CHANGELOG.md
@@ -0,0 +1,229 @@
+# Changelog
+
+All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
+
+### [8.3.2](https://github.com/uuidjs/uuid/compare/v8.3.1...v8.3.2) (2020-12-08)
+
+### Bug Fixes
+
+- lazy load getRandomValues ([#537](https://github.com/uuidjs/uuid/issues/537)) ([16c8f6d](https://github.com/uuidjs/uuid/commit/16c8f6df2f6b09b4d6235602d6a591188320a82e)), closes [#536](https://github.com/uuidjs/uuid/issues/536)
+
+### [8.3.1](https://github.com/uuidjs/uuid/compare/v8.3.0...v8.3.1) (2020-10-04)
+
+### Bug Fixes
+
+- support expo>=39.0.0 ([#515](https://github.com/uuidjs/uuid/issues/515)) ([c65a0f3](https://github.com/uuidjs/uuid/commit/c65a0f3fa73b901959d638d1e3591dfacdbed867)), closes [#375](https://github.com/uuidjs/uuid/issues/375)
+
+## [8.3.0](https://github.com/uuidjs/uuid/compare/v8.2.0...v8.3.0) (2020-07-27)
+
+### Features
+
+- add parse/stringify/validate/version/NIL APIs ([#479](https://github.com/uuidjs/uuid/issues/479)) ([0e6c10b](https://github.com/uuidjs/uuid/commit/0e6c10ba1bf9517796ff23c052fc0468eedfd5f4)), closes [#475](https://github.com/uuidjs/uuid/issues/475) [#478](https://github.com/uuidjs/uuid/issues/478) [#480](https://github.com/uuidjs/uuid/issues/480) [#481](https://github.com/uuidjs/uuid/issues/481) [#180](https://github.com/uuidjs/uuid/issues/180)
+
+## [8.2.0](https://github.com/uuidjs/uuid/compare/v8.1.0...v8.2.0) (2020-06-23)
+
+### Features
+
+- improve performance of v1 string representation ([#453](https://github.com/uuidjs/uuid/issues/453)) ([0ee0b67](https://github.com/uuidjs/uuid/commit/0ee0b67c37846529c66089880414d29f3ae132d5))
+- remove deprecated v4 string parameter ([#454](https://github.com/uuidjs/uuid/issues/454)) ([88ce3ca](https://github.com/uuidjs/uuid/commit/88ce3ca0ba046f60856de62c7ce03f7ba98ba46c)), closes [#437](https://github.com/uuidjs/uuid/issues/437)
+- support jspm ([#473](https://github.com/uuidjs/uuid/issues/473)) ([e9f2587](https://github.com/uuidjs/uuid/commit/e9f2587a92575cac31bc1d4ae944e17c09756659))
+
+### Bug Fixes
+
+- prepare package exports for webpack 5 ([#468](https://github.com/uuidjs/uuid/issues/468)) ([8d6e6a5](https://github.com/uuidjs/uuid/commit/8d6e6a5f8965ca9575eb4d92e99a43435f4a58a8))
+
+## [8.1.0](https://github.com/uuidjs/uuid/compare/v8.0.0...v8.1.0) (2020-05-20)
+
+### Features
+
+- improve v4 performance by reusing random number array ([#435](https://github.com/uuidjs/uuid/issues/435)) ([bf4af0d](https://github.com/uuidjs/uuid/commit/bf4af0d711b4d2ed03d1f74fd12ad0baa87dc79d))
+- optimize V8 performance of bytesToUuid ([#434](https://github.com/uuidjs/uuid/issues/434)) ([e156415](https://github.com/uuidjs/uuid/commit/e156415448ec1af2351fa0b6660cfb22581971f2))
+
+### Bug Fixes
+
+- export package.json required by react-native and bundlers ([#449](https://github.com/uuidjs/uuid/issues/449)) ([be1c8fe](https://github.com/uuidjs/uuid/commit/be1c8fe9a3206c358e0059b52fafd7213aa48a52)), closes [ai/nanoevents#44](https://github.com/ai/nanoevents/issues/44#issuecomment-602010343) [#444](https://github.com/uuidjs/uuid/issues/444)
+
+## [8.0.0](https://github.com/uuidjs/uuid/compare/v7.0.3...v8.0.0) (2020-04-29)
+
+### ⚠ BREAKING CHANGES
+
+- For native ECMAScript Module (ESM) usage in Node.js only named exports are exposed, there is no more default export.
+
+  ```diff
+  -import uuid from 'uuid';
+  -console.log(uuid.v4()); // -> 'cd6c3b08-0adc-4f4b-a6ef-36087a1c9869'
+  +import { v4 as uuidv4 } from 'uuid';
+  +uuidv4(); // ⇨ '9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d'
+  ```
+
+- Deep requiring specific algorithms of this library like `require('uuid/v4')`, which has been deprecated in `uuid@7`, is no longer supported.
+
+  Instead use the named exports that this module exports.
+
+  For ECMAScript Modules (ESM):
+
+  ```diff
+  -import uuidv4 from 'uuid/v4';
+  +import { v4 as uuidv4 } from 'uuid';
+  uuidv4();
+  ```
+
+  For CommonJS:
+
+  ```diff
+  -const uuidv4 = require('uuid/v4');
+  +const { v4: uuidv4 } = require('uuid');
+  uuidv4();
+  ```
+
+### Features
+
+- native Node.js ES Modules (wrapper approach) ([#423](https://github.com/uuidjs/uuid/issues/423)) ([2d9f590](https://github.com/uuidjs/uuid/commit/2d9f590ad9701d692625c07ed62f0a0f91227991)), closes [#245](https://github.com/uuidjs/uuid/issues/245) [#419](https://github.com/uuidjs/uuid/issues/419) [#342](https://github.com/uuidjs/uuid/issues/342)
+- remove deep requires ([#426](https://github.com/uuidjs/uuid/issues/426)) ([daf72b8](https://github.com/uuidjs/uuid/commit/daf72b84ceb20272a81bb5fbddb05dd95922cbba))
+
+### Bug Fixes
+
+- add CommonJS syntax example to README quickstart section ([#417](https://github.com/uuidjs/uuid/issues/417)) ([e0ec840](https://github.com/uuidjs/uuid/commit/e0ec8402c7ad44b7ef0453036c612f5db513fda0))
+
+### [7.0.3](https://github.com/uuidjs/uuid/compare/v7.0.2...v7.0.3) (2020-03-31)
+
+### Bug Fixes
+
+- make deep require deprecation warning work in browsers ([#409](https://github.com/uuidjs/uuid/issues/409)) ([4b71107](https://github.com/uuidjs/uuid/commit/4b71107d8c0d2ef56861ede6403fc9dc35a1e6bf)), closes [#408](https://github.com/uuidjs/uuid/issues/408)
+
+### [7.0.2](https://github.com/uuidjs/uuid/compare/v7.0.1...v7.0.2) (2020-03-04)
+
+### Bug Fixes
+
+- make access to msCrypto consistent ([#393](https://github.com/uuidjs/uuid/issues/393)) ([8bf2a20](https://github.com/uuidjs/uuid/commit/8bf2a20f3565df743da7215eebdbada9d2df118c))
+- simplify link in deprecation warning ([#391](https://github.com/uuidjs/uuid/issues/391)) ([bb2c8e4](https://github.com/uuidjs/uuid/commit/bb2c8e4e9f4c5f9c1eaaf3ea59710c633cd90cb7))
+- update links to match content in readme ([#386](https://github.com/uuidjs/uuid/issues/386)) ([44f2f86](https://github.com/uuidjs/uuid/commit/44f2f86e9d2bbf14ee5f0f00f72a3db1292666d4))
+
+### [7.0.1](https://github.com/uuidjs/uuid/compare/v7.0.0...v7.0.1) (2020-02-25)
+
+### Bug Fixes
+
+- clean up esm builds for node and browser ([#383](https://github.com/uuidjs/uuid/issues/383)) ([59e6a49](https://github.com/uuidjs/uuid/commit/59e6a49e7ce7b3e8fb0f3ee52b9daae72af467dc))
+- provide browser versions independent from module system ([#380](https://github.com/uuidjs/uuid/issues/380)) ([4344a22](https://github.com/uuidjs/uuid/commit/4344a22e7aed33be8627eeaaf05360f256a21753)), closes [#378](https://github.com/uuidjs/uuid/issues/378)
+
+## [7.0.0](https://github.com/uuidjs/uuid/compare/v3.4.0...v7.0.0) (2020-02-24)
+
+### ⚠ BREAKING CHANGES
+
+- The default export, which used to be the v4() method but which was already discouraged in v3.x of this library, has been removed.
+- Explicitly note that deep imports of the different uuid version functions are deprecated and no longer encouraged and that ECMAScript module named imports should be used instead. Emit a deprecation warning for people who deep-require the different algorithm variants.
+- Remove builtin support for insecure random number generators in the browser. Users who want that will have to supply their own random number generator function.
+- Remove support for generating v3 and v5 UUIDs in Node.js<4.x
+- Convert code base to ECMAScript Modules (ESM) and release CommonJS build for node and ESM build for browser bundlers.
+
+### Features
+
+- add UMD build to npm package ([#357](https://github.com/uuidjs/uuid/issues/357)) ([4e75adf](https://github.com/uuidjs/uuid/commit/4e75adf435196f28e3fbbe0185d654b5ded7ca2c)), closes [#345](https://github.com/uuidjs/uuid/issues/345)
+- add various es module and CommonJS examples ([b238510](https://github.com/uuidjs/uuid/commit/b238510bf352463521f74bab175a3af9b7a42555))
+- ensure that docs are up-to-date in CI ([ee5e77d](https://github.com/uuidjs/uuid/commit/ee5e77db547474f5a8f23d6c857a6d399209986b))
+- hybrid CommonJS & ECMAScript modules build ([a3f078f](https://github.com/uuidjs/uuid/commit/a3f078faa0baff69ab41aed08e041f8f9c8993d0))
+- remove insecure fallback random number generator ([3a5842b](https://github.com/uuidjs/uuid/commit/3a5842b141a6e5de0ae338f391661e6b84b167c9)), closes [#173](https://github.com/uuidjs/uuid/issues/173)
+- remove support for pre Node.js v4 Buffer API ([#356](https://github.com/uuidjs/uuid/issues/356)) ([b59b5c5](https://github.com/uuidjs/uuid/commit/b59b5c5ecad271c5453f1a156f011671f6d35627))
+- rename repository to github:uuidjs/uuid ([#351](https://github.com/uuidjs/uuid/issues/351)) ([c37a518](https://github.com/uuidjs/uuid/commit/c37a518e367ac4b6d0aa62dba1bc6ce9e85020f7)), closes [#338](https://github.com/uuidjs/uuid/issues/338)
+
+### Bug Fixes
+
+- add deep-require proxies for local testing and adjust tests ([#365](https://github.com/uuidjs/uuid/issues/365)) ([7fedc79](https://github.com/uuidjs/uuid/commit/7fedc79ac8fda4bfd1c566c7f05ef4ac13b2db48))
+- add note about removal of default export ([#372](https://github.com/uuidjs/uuid/issues/372)) ([12749b7](https://github.com/uuidjs/uuid/commit/12749b700eb49db8a9759fd306d8be05dbfbd58c)), closes [#370](https://github.com/uuidjs/uuid/issues/370)
+- deprecated deep requiring of the different algorithm versions ([#361](https://github.com/uuidjs/uuid/issues/361)) ([c0bdf15](https://github.com/uuidjs/uuid/commit/c0bdf15e417639b1aeb0b247b2fb11f7a0a26b23))
+
+## [3.4.0](https://github.com/uuidjs/uuid/compare/v3.3.3...v3.4.0) (2020-01-16)
+
+### Features
+
+- rename repository to github:uuidjs/uuid ([#351](https://github.com/uuidjs/uuid/issues/351)) ([e2d7314](https://github.com/uuidjs/uuid/commit/e2d7314)), closes [#338](https://github.com/uuidjs/uuid/issues/338)
+
+## [3.3.3](https://github.com/uuidjs/uuid/compare/v3.3.2...v3.3.3) (2019-08-19)
+
+### Bug Fixes
+
+- no longer run ci tests on node v4
+- upgrade dependencies
+
+## [3.3.2](https://github.com/uuidjs/uuid/compare/v3.3.1...v3.3.2) (2018-06-28)
+
+### Bug Fixes
+
+- typo ([305d877](https://github.com/uuidjs/uuid/commit/305d877))
+
+## [3.3.1](https://github.com/uuidjs/uuid/compare/v3.3.0...v3.3.1) (2018-06-28)
+
+### Bug Fixes
+
+- fix [#284](https://github.com/uuidjs/uuid/issues/284) by setting function name in try-catch ([f2a60f2](https://github.com/uuidjs/uuid/commit/f2a60f2))
+
+# [3.3.0](https://github.com/uuidjs/uuid/compare/v3.2.1...v3.3.0) (2018-06-22)
+
+### Bug Fixes
+
+- assignment to readonly property to allow running in strict mode ([#270](https://github.com/uuidjs/uuid/issues/270)) ([d062fdc](https://github.com/uuidjs/uuid/commit/d062fdc))
+- fix [#229](https://github.com/uuidjs/uuid/issues/229) ([c9684d4](https://github.com/uuidjs/uuid/commit/c9684d4))
+- Get correct version of IE11 crypto ([#274](https://github.com/uuidjs/uuid/issues/274)) ([153d331](https://github.com/uuidjs/uuid/commit/153d331))
+- mem issue when generating uuid ([#267](https://github.com/uuidjs/uuid/issues/267)) ([c47702c](https://github.com/uuidjs/uuid/commit/c47702c))
+
+### Features
+
+- enforce Conventional Commit style commit messages ([#282](https://github.com/uuidjs/uuid/issues/282)) ([cc9a182](https://github.com/uuidjs/uuid/commit/cc9a182))
+
+## [3.2.1](https://github.com/uuidjs/uuid/compare/v3.2.0...v3.2.1) (2018-01-16)
+
+### Bug Fixes
+
+- use msCrypto if available. Fixes [#241](https://github.com/uuidjs/uuid/issues/241) ([#247](https://github.com/uuidjs/uuid/issues/247)) ([1fef18b](https://github.com/uuidjs/uuid/commit/1fef18b))
+
+# [3.2.0](https://github.com/uuidjs/uuid/compare/v3.1.0...v3.2.0) (2018-01-16)
+
+### Bug Fixes
+
+- remove mistakenly added typescript dependency, rollback version (standard-version will auto-increment) ([09fa824](https://github.com/uuidjs/uuid/commit/09fa824))
+- use msCrypto if available. Fixes [#241](https://github.com/uuidjs/uuid/issues/241) ([#247](https://github.com/uuidjs/uuid/issues/247)) ([1fef18b](https://github.com/uuidjs/uuid/commit/1fef18b))
+
+### Features
+
+- Add v3 Support ([#217](https://github.com/uuidjs/uuid/issues/217)) ([d94f726](https://github.com/uuidjs/uuid/commit/d94f726))
+
+# [3.1.0](https://github.com/uuidjs/uuid/compare/v3.1.0...v3.0.1) (2017-06-17)
+
+### Bug Fixes
+
+- (fix) Add .npmignore file to exclude test/ and other non-essential files from packing. (#183)
+- Fix typo (#178)
+- Simple typo fix (#165)
+
+### Features
+
+- v5 support in CLI (#197)
+- V5 support (#188)
+
+# 3.0.1 (2016-11-28)
+
+- split uuid versions into separate files
+
+# 3.0.0 (2016-11-17)
+
+- remove .parse and .unparse
+
+# 2.0.0
+
+- Removed uuid.BufferClass
+
+# 1.4.0
+
+- Improved module context detection
+- Removed public RNG functions
+
+# 1.3.2
+
+- Improve tests and handling of v1() options (Issue #24)
+- Expose RNG option to allow for perf testing with different generators
+
+# 1.3.0
+
+- Support for version 1 ids, thanks to [@ctavan](https://github.com/ctavan)!
+- Support for node.js crypto API
+- De-emphasizing performance in favor of a) cryptographic quality PRNGs where available and b) more manageable code
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/CONTRIBUTING.md b/mqtt-backend/node_modules/hyperid/node_modules/uuid/CONTRIBUTING.md
new file mode 100644
index 0000000..4a4503d
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/CONTRIBUTING.md
@@ -0,0 +1,18 @@
+# Contributing
+
+Please feel free to file GitHub Issues or propose Pull Requests. We're always happy to discuss improvements to this library!
+
+## Testing
+
+```shell
+npm test
+```
+
+## Releasing
+
+Releases are supposed to be done from master, version bumping is automated through [`standard-version`](https://github.com/conventional-changelog/standard-version):
+
+```shell
+npm run release -- --dry-run  # verify output manually
+npm run release               # follow the instructions from the output of this command
+```
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/LICENSE.md b/mqtt-backend/node_modules/hyperid/node_modules/uuid/LICENSE.md
new file mode 100644
index 0000000..3934168
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/LICENSE.md
@@ -0,0 +1,9 @@
+The MIT License (MIT)
+
+Copyright (c) 2010-2020 Robert Kieffer and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/README.md b/mqtt-backend/node_modules/hyperid/node_modules/uuid/README.md
new file mode 100644
index 0000000..ed27e57
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/README.md
@@ -0,0 +1,505 @@
+<!--
+  -- This file is auto-generated from README_js.md. Changes should be made there.
+  -->
+
+# uuid [![CI](https://github.com/uuidjs/uuid/workflows/CI/badge.svg)](https://github.com/uuidjs/uuid/actions?query=workflow%3ACI) [![Browser](https://github.com/uuidjs/uuid/workflows/Browser/badge.svg)](https://github.com/uuidjs/uuid/actions?query=workflow%3ABrowser)
+
+For the creation of [RFC4122](http://www.ietf.org/rfc/rfc4122.txt) UUIDs
+
+- **Complete** - Support for RFC4122 version 1, 3, 4, and 5 UUIDs
+- **Cross-platform** - Support for ...
+  - CommonJS, [ECMAScript Modules](#ecmascript-modules) and [CDN builds](#cdn-builds)
+  - Node 8, 10, 12, 14
+  - Chrome, Safari, Firefox, Edge, IE 11 browsers
+  - Webpack and rollup.js module bundlers
+  - [React Native / Expo](#react-native--expo)
+- **Secure** - Cryptographically-strong random values
+- **Small** - Zero-dependency, small footprint, plays nice with "tree shaking" packagers
+- **CLI** - Includes the [`uuid` command line](#command-line) utility
+
+**Upgrading from `uuid@3.x`?** Your code is probably okay, but check out [Upgrading From `uuid@3.x`](#upgrading-from-uuid3x) for details.
+
+## Quickstart
+
+To create a random UUID...
+
+**1. Install**
+
+```shell
+npm install uuid
+```
+
+**2. Create a UUID** (ES6 module syntax)
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+uuidv4(); // ⇨ '9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d'
+```
+
+... or using CommonJS syntax:
+
+```javascript
+const { v4: uuidv4 } = require('uuid');
+uuidv4(); // ⇨ '1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed'
+```
+
+For timestamp UUIDs, namespace UUIDs, and other options read on ...
+
+## API Summary
+
+|  |  |  |
+| --- | --- | --- |
+| [`uuid.NIL`](#uuidnil) | The nil UUID string (all zeros) | New in `uuid@8.3` |
+| [`uuid.parse()`](#uuidparsestr) | Convert UUID string to array of bytes | New in `uuid@8.3` |
+| [`uuid.stringify()`](#uuidstringifyarr-offset) | Convert array of bytes to UUID string | New in `uuid@8.3` |
+| [`uuid.v1()`](#uuidv1options-buffer-offset) | Create a version 1 (timestamp) UUID |  |
+| [`uuid.v3()`](#uuidv3name-namespace-buffer-offset) | Create a version 3 (namespace w/ MD5) UUID |  |
+| [`uuid.v4()`](#uuidv4options-buffer-offset) | Create a version 4 (random) UUID |  |
+| [`uuid.v5()`](#uuidv5name-namespace-buffer-offset) | Create a version 5 (namespace w/ SHA-1) UUID |  |
+| [`uuid.validate()`](#uuidvalidatestr) | Test a string to see if it is a valid UUID | New in `uuid@8.3` |
+| [`uuid.version()`](#uuidversionstr) | Detect RFC version of a UUID | New in `uuid@8.3` |
+
+## API
+
+### uuid.NIL
+
+The nil UUID string (all zeros).
+
+Example:
+
+```javascript
+import { NIL as NIL_UUID } from 'uuid';
+
+NIL_UUID; // ⇨ '00000000-0000-0000-0000-000000000000'
+```
+
+### uuid.parse(str)
+
+Convert UUID string to array of bytes
+
+|           |                                          |
+| --------- | ---------------------------------------- |
+| `str`     | A valid UUID `String`                    |
+| _returns_ | `Uint8Array[16]`                         |
+| _throws_  | `TypeError` if `str` is not a valid UUID |
+
+Note: Ordering of values in the byte arrays used by `parse()` and `stringify()` follows the left &Rarr; right order of hex-pairs in UUID strings. As shown in the example below.
+
+Example:
+
+```javascript
+import { parse as uuidParse } from 'uuid';
+
+// Parse a UUID
+const bytes = uuidParse('6ec0bd7f-11c0-43da-975e-2a8ad9ebae0b');
+
+// Convert to hex strings to show byte order (for documentation purposes)
+[...bytes].map((v) => v.toString(16).padStart(2, '0')); // ⇨ 
+  // [
+  //   '6e', 'c0', 'bd', '7f',
+  //   '11', 'c0', '43', 'da',
+  //   '97', '5e', '2a', '8a',
+  //   'd9', 'eb', 'ae', '0b'
+  // ]
+```
+
+### uuid.stringify(arr[, offset])
+
+Convert array of bytes to UUID string
+
+|                |                                                                              |
+| -------------- | ---------------------------------------------------------------------------- |
+| `arr`          | `Array`-like collection of 16 values (starting from `offset`) between 0-255. |
+| [`offset` = 0] | `Number` Starting index in the Array                                         |
+| _returns_      | `String`                                                                     |
+| _throws_       | `TypeError` if a valid UUID string cannot be generated                       |
+
+Note: Ordering of values in the byte arrays used by `parse()` and `stringify()` follows the left &Rarr; right order of hex-pairs in UUID strings. As shown in the example below.
+
+Example:
+
+```javascript
+import { stringify as uuidStringify } from 'uuid';
+
+const uuidBytes = [
+  0x6e,
+  0xc0,
+  0xbd,
+  0x7f,
+  0x11,
+  0xc0,
+  0x43,
+  0xda,
+  0x97,
+  0x5e,
+  0x2a,
+  0x8a,
+  0xd9,
+  0xeb,
+  0xae,
+  0x0b,
+];
+
+uuidStringify(uuidBytes); // ⇨ '6ec0bd7f-11c0-43da-975e-2a8ad9ebae0b'
+```
+
+### uuid.v1([options[, buffer[, offset]]])
+
+Create an RFC version 1 (timestamp) UUID
+
+|  |  |
+| --- | --- |
+| [`options`] | `Object` with one or more of the following properties: |
+| [`options.node` ] | RFC "node" field as an `Array[6]` of byte values (per 4.1.6) |
+| [`options.clockseq`] | RFC "clock sequence" as a `Number` between 0 - 0x3fff |
+| [`options.msecs`] | RFC "timestamp" field (`Number` of milliseconds, unix epoch) |
+| [`options.nsecs`] | RFC "timestamp" field (`Number` of nanseconds to add to `msecs`, should be 0-10,000) |
+| [`options.random`] | `Array` of 16 random bytes (0-255) |
+| [`options.rng`] | Alternative to `options.random`, a `Function` that returns an `Array` of 16 random bytes (0-255) |
+| [`buffer`] | `Array \| Buffer` If specified, uuid will be written here in byte-form, starting at `offset` |
+| [`offset` = 0] | `Number` Index to start writing UUID bytes in `buffer` |
+| _returns_ | UUID `String` if no `buffer` is specified, otherwise returns `buffer` |
+| _throws_ | `Error` if more than 10M UUIDs/sec are requested |
+
+Note: The default [node id](https://tools.ietf.org/html/rfc4122#section-4.1.6) (the last 12 digits in the UUID) is generated once, randomly, on process startup, and then remains unchanged for the duration of the process.
+
+Note: `options.random` and `options.rng` are only meaningful on the very first call to `v1()`, where they may be passed to initialize the internal `node` and `clockseq` fields.
+
+Example:
+
+```javascript
+import { v1 as uuidv1 } from 'uuid';
+
+uuidv1(); // ⇨ '2c5ea4c0-4067-11e9-8bad-9b1deb4d3b7d'
+```
+
+Example using `options`:
+
+```javascript
+import { v1 as uuidv1 } from 'uuid';
+
+const v1options = {
+  node: [0x01, 0x23, 0x45, 0x67, 0x89, 0xab],
+  clockseq: 0x1234,
+  msecs: new Date('2011-11-01').getTime(),
+  nsecs: 5678,
+};
+uuidv1(v1options); // ⇨ '710b962e-041c-11e1-9234-0123456789ab'
+```
+
+### uuid.v3(name, namespace[, buffer[, offset]])
+
+Create an RFC version 3 (namespace w/ MD5) UUID
+
+API is identical to `v5()`, but uses "v3" instead.
+
+&#x26a0;&#xfe0f; Note: Per the RFC, "_If backward compatibility is not an issue, SHA-1 [Version 5] is preferred_."
+
+### uuid.v4([options[, buffer[, offset]]])
+
+Create an RFC version 4 (random) UUID
+
+|  |  |
+| --- | --- |
+| [`options`] | `Object` with one or more of the following properties: |
+| [`options.random`] | `Array` of 16 random bytes (0-255) |
+| [`options.rng`] | Alternative to `options.random`, a `Function` that returns an `Array` of 16 random bytes (0-255) |
+| [`buffer`] | `Array \| Buffer` If specified, uuid will be written here in byte-form, starting at `offset` |
+| [`offset` = 0] | `Number` Index to start writing UUID bytes in `buffer` |
+| _returns_ | UUID `String` if no `buffer` is specified, otherwise returns `buffer` |
+
+Example:
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+
+uuidv4(); // ⇨ '1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed'
+```
+
+Example using predefined `random` values:
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+
+const v4options = {
+  random: [
+    0x10,
+    0x91,
+    0x56,
+    0xbe,
+    0xc4,
+    0xfb,
+    0xc1,
+    0xea,
+    0x71,
+    0xb4,
+    0xef,
+    0xe1,
+    0x67,
+    0x1c,
+    0x58,
+    0x36,
+  ],
+};
+uuidv4(v4options); // ⇨ '109156be-c4fb-41ea-b1b4-efe1671c5836'
+```
+
+### uuid.v5(name, namespace[, buffer[, offset]])
+
+Create an RFC version 5 (namespace w/ SHA-1) UUID
+
+|  |  |
+| --- | --- |
+| `name` | `String \| Array` |
+| `namespace` | `String \| Array[16]` Namespace UUID |
+| [`buffer`] | `Array \| Buffer` If specified, uuid will be written here in byte-form, starting at `offset` |
+| [`offset` = 0] | `Number` Index to start writing UUID bytes in `buffer` |
+| _returns_ | UUID `String` if no `buffer` is specified, otherwise returns `buffer` |
+
+Note: The RFC `DNS` and `URL` namespaces are available as `v5.DNS` and `v5.URL`.
+
+Example with custom namespace:
+
+```javascript
+import { v5 as uuidv5 } from 'uuid';
+
+// Define a custom namespace.  Readers, create your own using something like
+// https://www.uuidgenerator.net/
+const MY_NAMESPACE = '1b671a64-40d5-491e-99b0-da01ff1f3341';
+
+uuidv5('Hello, World!', MY_NAMESPACE); // ⇨ '630eb68f-e0fa-5ecc-887a-7c7a62614681'
+```
+
+Example with RFC `URL` namespace:
+
+```javascript
+import { v5 as uuidv5 } from 'uuid';
+
+uuidv5('https://www.w3.org/', uuidv5.URL); // ⇨ 'c106a26a-21bb-5538-8bf2-57095d1976c1'
+```
+
+### uuid.validate(str)
+
+Test a string to see if it is a valid UUID
+
+|           |                                                     |
+| --------- | --------------------------------------------------- |
+| `str`     | `String` to validate                                |
+| _returns_ | `true` if string is a valid UUID, `false` otherwise |
+
+Example:
+
+```javascript
+import { validate as uuidValidate } from 'uuid';
+
+uuidValidate('not a UUID'); // ⇨ false
+uuidValidate('6ec0bd7f-11c0-43da-975e-2a8ad9ebae0b'); // ⇨ true
+```
+
+Using `validate` and `version` together it is possible to do per-version validation, e.g. validate for only v4 UUIds.
+
+```javascript
+import { version as uuidVersion } from 'uuid';
+import { validate as uuidValidate } from 'uuid';
+
+function uuidValidateV4(uuid) {
+  return uuidValidate(uuid) && uuidVersion(uuid) === 4;
+}
+
+const v1Uuid = 'd9428888-122b-11e1-b85c-61cd3cbb3210';
+const v4Uuid = '109156be-c4fb-41ea-b1b4-efe1671c5836';
+
+uuidValidateV4(v4Uuid); // ⇨ true
+uuidValidateV4(v1Uuid); // ⇨ false
+```
+
+### uuid.version(str)
+
+Detect RFC version of a UUID
+
+|           |                                          |
+| --------- | ---------------------------------------- |
+| `str`     | A valid UUID `String`                    |
+| _returns_ | `Number` The RFC version of the UUID     |
+| _throws_  | `TypeError` if `str` is not a valid UUID |
+
+Example:
+
+```javascript
+import { version as uuidVersion } from 'uuid';
+
+uuidVersion('45637ec4-c85f-11ea-87d0-0242ac130003'); // ⇨ 1
+uuidVersion('6ec0bd7f-11c0-43da-975e-2a8ad9ebae0b'); // ⇨ 4
+```
+
+## Command Line
+
+UUIDs can be generated from the command line using `uuid`.
+
+```shell
+$ uuid
+ddeb27fb-d9a0-4624-be4d-4615062daed4
+```
+
+The default is to generate version 4 UUIDS, however the other versions are supported. Type `uuid --help` for details:
+
+```shell
+$ uuid --help
+
+Usage:
+  uuid
+  uuid v1
+  uuid v3 <name> <namespace uuid>
+  uuid v4
+  uuid v5 <name> <namespace uuid>
+  uuid --help
+
+Note: <namespace uuid> may be "URL" or "DNS" to use the corresponding UUIDs
+defined by RFC4122
+```
+
+## ECMAScript Modules
+
+This library comes with [ECMAScript Modules](https://www.ecma-international.org/ecma-262/6.0/#sec-modules) (ESM) support for Node.js versions that support it ([example](./examples/node-esmodules/)) as well as bundlers like [rollup.js](https://rollupjs.org/guide/en/#tree-shaking) ([example](./examples/browser-rollup/)) and [webpack](https://webpack.js.org/guides/tree-shaking/) ([example](./examples/browser-webpack/)) (targeting both, Node.js and browser environments).
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+uuidv4(); // ⇨ '1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed'
+```
+
+To run the examples you must first create a dist build of this library in the module root:
+
+```shell
+npm run build
+```
+
+## CDN Builds
+
+### ECMAScript Modules
+
+To load this module directly into modern browsers that [support loading ECMAScript Modules](https://caniuse.com/#feat=es6-module) you can make use of [jspm](https://jspm.org/):
+
+```html
+<script type="module">
+  import { v4 as uuidv4 } from 'https://jspm.dev/uuid';
+  console.log(uuidv4()); // ⇨ '1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed'
+</script>
+```
+
+### UMD
+
+To load this module directly into older browsers you can use the [UMD (Universal Module Definition)](https://github.com/umdjs/umd) builds from any of the following CDNs:
+
+**Using [UNPKG](https://unpkg.com/uuid@latest/dist/umd/)**:
+
+```html
+<script src="https://unpkg.com/uuid@latest/dist/umd/uuidv4.min.js"></script>
+```
+
+**Using [jsDelivr](https://cdn.jsdelivr.net/npm/uuid@latest/dist/umd/)**:
+
+```html
+<script src="https://cdn.jsdelivr.net/npm/uuid@latest/dist/umd/uuidv4.min.js"></script>
+```
+
+**Using [cdnjs](https://cdnjs.com/libraries/uuid)**:
+
+```html
+<script src="https://cdnjs.cloudflare.com/ajax/libs/uuid/8.1.0/uuidv4.min.js"></script>
+```
+
+These CDNs all provide the same [`uuidv4()`](#uuidv4options-buffer-offset) method:
+
+```html
+<script>
+  uuidv4(); // ⇨ '55af1e37-0734-46d8-b070-a1e42e4fc392'
+</script>
+```
+
+Methods for the other algorithms ([`uuidv1()`](#uuidv1options-buffer-offset), [`uuidv3()`](#uuidv3name-namespace-buffer-offset) and [`uuidv5()`](#uuidv5name-namespace-buffer-offset)) are available from the files `uuidv1.min.js`, `uuidv3.min.js` and `uuidv5.min.js` respectively.
+
+## "getRandomValues() not supported"
+
+This error occurs in environments where the standard [`crypto.getRandomValues()`](https://developer.mozilla.org/en-US/docs/Web/API/Crypto/getRandomValues) API is not supported. This issue can be resolved by adding an appropriate polyfill:
+
+### React Native / Expo
+
+1. Install [`react-native-get-random-values`](https://github.com/LinusU/react-native-get-random-values#readme)
+1. Import it _before_ `uuid`. Since `uuid` might also appear as a transitive dependency of some other imports it's safest to just import `react-native-get-random-values` as the very first thing in your entry point:
+
+```javascript
+import 'react-native-get-random-values';
+import { v4 as uuidv4 } from 'uuid';
+```
+
+Note: If you are using Expo, you must be using at least `react-native-get-random-values@1.5.0` and `expo@39.0.0`.
+
+### Web Workers / Service Workers (Edge <= 18)
+
+[In Edge <= 18, Web Crypto is not supported in Web Workers or Service Workers](https://caniuse.com/#feat=cryptography) and we are not aware of a polyfill (let us know if you find one, please).
+
+## Upgrading From `uuid@7.x`
+
+### Only Named Exports Supported When Using with Node.js ESM
+
+`uuid@7.x` did not come with native ECMAScript Module (ESM) support for Node.js. Importing it in Node.js ESM consequently imported the CommonJS source with a default export. This library now comes with true Node.js ESM support and only provides named exports.
+
+Instead of doing:
+
+```javascript
+import uuid from 'uuid';
+uuid.v4();
+```
+
+you will now have to use the named exports:
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+uuidv4();
+```
+
+### Deep Requires No Longer Supported
+
+Deep requires like `require('uuid/v4')` [which have been deprecated in `uuid@7.x`](#deep-requires-now-deprecated) are no longer supported.
+
+## Upgrading From `uuid@3.x`
+
+"_Wait... what happened to `uuid@4.x` - `uuid@6.x`?!?_"
+
+In order to avoid confusion with RFC [version 4](#uuidv4options-buffer-offset) and [version 5](#uuidv5name-namespace-buffer-offset) UUIDs, and a possible [version 6](http://gh.peabody.io/uuidv6/), releases 4 thru 6 of this module have been skipped.
+
+### Deep Requires Now Deprecated
+
+`uuid@3.x` encouraged the use of deep requires to minimize the bundle size of browser builds:
+
+```javascript
+const uuidv4 = require('uuid/v4'); // <== NOW DEPRECATED!
+uuidv4();
+```
+
+As of `uuid@7.x` this library now provides ECMAScript modules builds, which allow packagers like Webpack and Rollup to do "tree-shaking" to remove dead code. Instead, use the `import` syntax:
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+uuidv4();
+```
+
+... or for CommonJS:
+
+```javascript
+const { v4: uuidv4 } = require('uuid');
+uuidv4();
+```
+
+### Default Export Removed
+
+`uuid@3.x` was exporting the Version 4 UUID method as a default export:
+
+```javascript
+const uuid = require('uuid'); // <== REMOVED!
+```
+
+This usage pattern was already discouraged in `uuid@3.x` and has been removed in `uuid@7.x`.
+
+----
+Markdown generated from [README_js.md](README_js.md) by [![RunMD Logo](http://i.imgur.com/h0FVyzU.png)](https://github.com/broofa/runmd)
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/bin/uuid b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/bin/uuid
new file mode 100644
index 0000000..f38d2ee
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/bin/uuid
@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+require('../uuid-bin');
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/index.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/index.js
new file mode 100644
index 0000000..1db6f6d
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/index.js
@@ -0,0 +1,9 @@
+export { default as v1 } from './v1.js';
+export { default as v3 } from './v3.js';
+export { default as v4 } from './v4.js';
+export { default as v5 } from './v5.js';
+export { default as NIL } from './nil.js';
+export { default as version } from './version.js';
+export { default as validate } from './validate.js';
+export { default as stringify } from './stringify.js';
+export { default as parse } from './parse.js';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/md5.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/md5.js
new file mode 100644
index 0000000..8b5d46a
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/md5.js
@@ -0,0 +1,215 @@
+/*
+ * Browser-compatible JavaScript MD5
+ *
+ * Modification of JavaScript MD5
+ * https://github.com/blueimp/JavaScript-MD5
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ *
+ * Based on
+ * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+ * Digest Algorithm, as defined in RFC 1321.
+ * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for more info.
+ */
+function md5(bytes) {
+  if (typeof bytes === 'string') {
+    var msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
+
+    bytes = new Uint8Array(msg.length);
+
+    for (var i = 0; i < msg.length; ++i) {
+      bytes[i] = msg.charCodeAt(i);
+    }
+  }
+
+  return md5ToHexEncodedArray(wordsToMd5(bytesToWords(bytes), bytes.length * 8));
+}
+/*
+ * Convert an array of little-endian words to an array of bytes
+ */
+
+
+function md5ToHexEncodedArray(input) {
+  var output = [];
+  var length32 = input.length * 32;
+  var hexTab = '0123456789abcdef';
+
+  for (var i = 0; i < length32; i += 8) {
+    var x = input[i >> 5] >>> i % 32 & 0xff;
+    var hex = parseInt(hexTab.charAt(x >>> 4 & 0x0f) + hexTab.charAt(x & 0x0f), 16);
+    output.push(hex);
+  }
+
+  return output;
+}
+/**
+ * Calculate output length with padding and bit length
+ */
+
+
+function getOutputLength(inputLength8) {
+  return (inputLength8 + 64 >>> 9 << 4) + 14 + 1;
+}
+/*
+ * Calculate the MD5 of an array of little-endian words, and a bit length.
+ */
+
+
+function wordsToMd5(x, len) {
+  /* append padding */
+  x[len >> 5] |= 0x80 << len % 32;
+  x[getOutputLength(len) - 1] = len;
+  var a = 1732584193;
+  var b = -271733879;
+  var c = -1732584194;
+  var d = 271733878;
+
+  for (var i = 0; i < x.length; i += 16) {
+    var olda = a;
+    var oldb = b;
+    var oldc = c;
+    var oldd = d;
+    a = md5ff(a, b, c, d, x[i], 7, -680876936);
+    d = md5ff(d, a, b, c, x[i + 1], 12, -389564586);
+    c = md5ff(c, d, a, b, x[i + 2], 17, 606105819);
+    b = md5ff(b, c, d, a, x[i + 3], 22, -1044525330);
+    a = md5ff(a, b, c, d, x[i + 4], 7, -176418897);
+    d = md5ff(d, a, b, c, x[i + 5], 12, 1200080426);
+    c = md5ff(c, d, a, b, x[i + 6], 17, -1473231341);
+    b = md5ff(b, c, d, a, x[i + 7], 22, -45705983);
+    a = md5ff(a, b, c, d, x[i + 8], 7, 1770035416);
+    d = md5ff(d, a, b, c, x[i + 9], 12, -1958414417);
+    c = md5ff(c, d, a, b, x[i + 10], 17, -42063);
+    b = md5ff(b, c, d, a, x[i + 11], 22, -1990404162);
+    a = md5ff(a, b, c, d, x[i + 12], 7, 1804603682);
+    d = md5ff(d, a, b, c, x[i + 13], 12, -40341101);
+    c = md5ff(c, d, a, b, x[i + 14], 17, -1502002290);
+    b = md5ff(b, c, d, a, x[i + 15], 22, 1236535329);
+    a = md5gg(a, b, c, d, x[i + 1], 5, -165796510);
+    d = md5gg(d, a, b, c, x[i + 6], 9, -1069501632);
+    c = md5gg(c, d, a, b, x[i + 11], 14, 643717713);
+    b = md5gg(b, c, d, a, x[i], 20, -373897302);
+    a = md5gg(a, b, c, d, x[i + 5], 5, -701558691);
+    d = md5gg(d, a, b, c, x[i + 10], 9, 38016083);
+    c = md5gg(c, d, a, b, x[i + 15], 14, -660478335);
+    b = md5gg(b, c, d, a, x[i + 4], 20, -405537848);
+    a = md5gg(a, b, c, d, x[i + 9], 5, 568446438);
+    d = md5gg(d, a, b, c, x[i + 14], 9, -1019803690);
+    c = md5gg(c, d, a, b, x[i + 3], 14, -187363961);
+    b = md5gg(b, c, d, a, x[i + 8], 20, 1163531501);
+    a = md5gg(a, b, c, d, x[i + 13], 5, -1444681467);
+    d = md5gg(d, a, b, c, x[i + 2], 9, -51403784);
+    c = md5gg(c, d, a, b, x[i + 7], 14, 1735328473);
+    b = md5gg(b, c, d, a, x[i + 12], 20, -1926607734);
+    a = md5hh(a, b, c, d, x[i + 5], 4, -378558);
+    d = md5hh(d, a, b, c, x[i + 8], 11, -2022574463);
+    c = md5hh(c, d, a, b, x[i + 11], 16, 1839030562);
+    b = md5hh(b, c, d, a, x[i + 14], 23, -35309556);
+    a = md5hh(a, b, c, d, x[i + 1], 4, -1530992060);
+    d = md5hh(d, a, b, c, x[i + 4], 11, 1272893353);
+    c = md5hh(c, d, a, b, x[i + 7], 16, -155497632);
+    b = md5hh(b, c, d, a, x[i + 10], 23, -1094730640);
+    a = md5hh(a, b, c, d, x[i + 13], 4, 681279174);
+    d = md5hh(d, a, b, c, x[i], 11, -358537222);
+    c = md5hh(c, d, a, b, x[i + 3], 16, -722521979);
+    b = md5hh(b, c, d, a, x[i + 6], 23, 76029189);
+    a = md5hh(a, b, c, d, x[i + 9], 4, -640364487);
+    d = md5hh(d, a, b, c, x[i + 12], 11, -421815835);
+    c = md5hh(c, d, a, b, x[i + 15], 16, 530742520);
+    b = md5hh(b, c, d, a, x[i + 2], 23, -995338651);
+    a = md5ii(a, b, c, d, x[i], 6, -198630844);
+    d = md5ii(d, a, b, c, x[i + 7], 10, 1126891415);
+    c = md5ii(c, d, a, b, x[i + 14], 15, -1416354905);
+    b = md5ii(b, c, d, a, x[i + 5], 21, -57434055);
+    a = md5ii(a, b, c, d, x[i + 12], 6, 1700485571);
+    d = md5ii(d, a, b, c, x[i + 3], 10, -1894986606);
+    c = md5ii(c, d, a, b, x[i + 10], 15, -1051523);
+    b = md5ii(b, c, d, a, x[i + 1], 21, -2054922799);
+    a = md5ii(a, b, c, d, x[i + 8], 6, 1873313359);
+    d = md5ii(d, a, b, c, x[i + 15], 10, -30611744);
+    c = md5ii(c, d, a, b, x[i + 6], 15, -1560198380);
+    b = md5ii(b, c, d, a, x[i + 13], 21, 1309151649);
+    a = md5ii(a, b, c, d, x[i + 4], 6, -145523070);
+    d = md5ii(d, a, b, c, x[i + 11], 10, -1120210379);
+    c = md5ii(c, d, a, b, x[i + 2], 15, 718787259);
+    b = md5ii(b, c, d, a, x[i + 9], 21, -343485551);
+    a = safeAdd(a, olda);
+    b = safeAdd(b, oldb);
+    c = safeAdd(c, oldc);
+    d = safeAdd(d, oldd);
+  }
+
+  return [a, b, c, d];
+}
+/*
+ * Convert an array bytes to an array of little-endian words
+ * Characters >255 have their high-byte silently ignored.
+ */
+
+
+function bytesToWords(input) {
+  if (input.length === 0) {
+    return [];
+  }
+
+  var length8 = input.length * 8;
+  var output = new Uint32Array(getOutputLength(length8));
+
+  for (var i = 0; i < length8; i += 8) {
+    output[i >> 5] |= (input[i / 8] & 0xff) << i % 32;
+  }
+
+  return output;
+}
+/*
+ * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+ * to work around bugs in some JS interpreters.
+ */
+
+
+function safeAdd(x, y) {
+  var lsw = (x & 0xffff) + (y & 0xffff);
+  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+  return msw << 16 | lsw & 0xffff;
+}
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+
+
+function bitRotateLeft(num, cnt) {
+  return num << cnt | num >>> 32 - cnt;
+}
+/*
+ * These functions implement the four basic operations the algorithm uses.
+ */
+
+
+function md5cmn(q, a, b, x, s, t) {
+  return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b);
+}
+
+function md5ff(a, b, c, d, x, s, t) {
+  return md5cmn(b & c | ~b & d, a, b, x, s, t);
+}
+
+function md5gg(a, b, c, d, x, s, t) {
+  return md5cmn(b & d | c & ~d, a, b, x, s, t);
+}
+
+function md5hh(a, b, c, d, x, s, t) {
+  return md5cmn(b ^ c ^ d, a, b, x, s, t);
+}
+
+function md5ii(a, b, c, d, x, s, t) {
+  return md5cmn(c ^ (b | ~d), a, b, x, s, t);
+}
+
+export default md5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/nil.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/nil.js
new file mode 100644
index 0000000..b36324c
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/nil.js
@@ -0,0 +1 @@
+export default '00000000-0000-0000-0000-000000000000';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/parse.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/parse.js
new file mode 100644
index 0000000..7c5b1d5
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/parse.js
@@ -0,0 +1,35 @@
+import validate from './validate.js';
+
+function parse(uuid) {
+  if (!validate(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+
+  var v;
+  var arr = new Uint8Array(16); // Parse ########-....-....-....-............
+
+  arr[0] = (v = parseInt(uuid.slice(0, 8), 16)) >>> 24;
+  arr[1] = v >>> 16 & 0xff;
+  arr[2] = v >>> 8 & 0xff;
+  arr[3] = v & 0xff; // Parse ........-####-....-....-............
+
+  arr[4] = (v = parseInt(uuid.slice(9, 13), 16)) >>> 8;
+  arr[5] = v & 0xff; // Parse ........-....-####-....-............
+
+  arr[6] = (v = parseInt(uuid.slice(14, 18), 16)) >>> 8;
+  arr[7] = v & 0xff; // Parse ........-....-....-####-............
+
+  arr[8] = (v = parseInt(uuid.slice(19, 23), 16)) >>> 8;
+  arr[9] = v & 0xff; // Parse ........-....-....-....-############
+  // (Use "/" to avoid 32-bit truncation when bit-shifting high-order bytes)
+
+  arr[10] = (v = parseInt(uuid.slice(24, 36), 16)) / 0x10000000000 & 0xff;
+  arr[11] = v / 0x100000000 & 0xff;
+  arr[12] = v >>> 24 & 0xff;
+  arr[13] = v >>> 16 & 0xff;
+  arr[14] = v >>> 8 & 0xff;
+  arr[15] = v & 0xff;
+  return arr;
+}
+
+export default parse;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/regex.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/regex.js
new file mode 100644
index 0000000..3da8673
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/regex.js
@@ -0,0 +1 @@
+export default /^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/rng.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/rng.js
new file mode 100644
index 0000000..8abbf2e
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/rng.js
@@ -0,0 +1,19 @@
+// Unique ID creation requires a high quality random # generator. In the browser we therefore
+// require the crypto API and do not support built-in fallback to lower quality random number
+// generators (like Math.random()).
+var getRandomValues;
+var rnds8 = new Uint8Array(16);
+export default function rng() {
+  // lazy load so that environments that need to polyfill have a chance to do so
+  if (!getRandomValues) {
+    // getRandomValues needs to be invoked in a context where "this" is a Crypto implementation. Also,
+    // find the complete implementation of crypto (msCrypto) on IE11.
+    getRandomValues = typeof crypto !== 'undefined' && crypto.getRandomValues && crypto.getRandomValues.bind(crypto) || typeof msCrypto !== 'undefined' && typeof msCrypto.getRandomValues === 'function' && msCrypto.getRandomValues.bind(msCrypto);
+
+    if (!getRandomValues) {
+      throw new Error('crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported');
+    }
+  }
+
+  return getRandomValues(rnds8);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/sha1.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/sha1.js
new file mode 100644
index 0000000..940548b
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/sha1.js
@@ -0,0 +1,96 @@
+// Adapted from Chris Veness' SHA1 code at
+// http://www.movable-type.co.uk/scripts/sha1.html
+function f(s, x, y, z) {
+  switch (s) {
+    case 0:
+      return x & y ^ ~x & z;
+
+    case 1:
+      return x ^ y ^ z;
+
+    case 2:
+      return x & y ^ x & z ^ y & z;
+
+    case 3:
+      return x ^ y ^ z;
+  }
+}
+
+function ROTL(x, n) {
+  return x << n | x >>> 32 - n;
+}
+
+function sha1(bytes) {
+  var K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];
+  var H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];
+
+  if (typeof bytes === 'string') {
+    var msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
+
+    bytes = [];
+
+    for (var i = 0; i < msg.length; ++i) {
+      bytes.push(msg.charCodeAt(i));
+    }
+  } else if (!Array.isArray(bytes)) {
+    // Convert Array-like to Array
+    bytes = Array.prototype.slice.call(bytes);
+  }
+
+  bytes.push(0x80);
+  var l = bytes.length / 4 + 2;
+  var N = Math.ceil(l / 16);
+  var M = new Array(N);
+
+  for (var _i = 0; _i < N; ++_i) {
+    var arr = new Uint32Array(16);
+
+    for (var j = 0; j < 16; ++j) {
+      arr[j] = bytes[_i * 64 + j * 4] << 24 | bytes[_i * 64 + j * 4 + 1] << 16 | bytes[_i * 64 + j * 4 + 2] << 8 | bytes[_i * 64 + j * 4 + 3];
+    }
+
+    M[_i] = arr;
+  }
+
+  M[N - 1][14] = (bytes.length - 1) * 8 / Math.pow(2, 32);
+  M[N - 1][14] = Math.floor(M[N - 1][14]);
+  M[N - 1][15] = (bytes.length - 1) * 8 & 0xffffffff;
+
+  for (var _i2 = 0; _i2 < N; ++_i2) {
+    var W = new Uint32Array(80);
+
+    for (var t = 0; t < 16; ++t) {
+      W[t] = M[_i2][t];
+    }
+
+    for (var _t = 16; _t < 80; ++_t) {
+      W[_t] = ROTL(W[_t - 3] ^ W[_t - 8] ^ W[_t - 14] ^ W[_t - 16], 1);
+    }
+
+    var a = H[0];
+    var b = H[1];
+    var c = H[2];
+    var d = H[3];
+    var e = H[4];
+
+    for (var _t2 = 0; _t2 < 80; ++_t2) {
+      var s = Math.floor(_t2 / 20);
+      var T = ROTL(a, 5) + f(s, b, c, d) + e + K[s] + W[_t2] >>> 0;
+      e = d;
+      d = c;
+      c = ROTL(b, 30) >>> 0;
+      b = a;
+      a = T;
+    }
+
+    H[0] = H[0] + a >>> 0;
+    H[1] = H[1] + b >>> 0;
+    H[2] = H[2] + c >>> 0;
+    H[3] = H[3] + d >>> 0;
+    H[4] = H[4] + e >>> 0;
+  }
+
+  return [H[0] >> 24 & 0xff, H[0] >> 16 & 0xff, H[0] >> 8 & 0xff, H[0] & 0xff, H[1] >> 24 & 0xff, H[1] >> 16 & 0xff, H[1] >> 8 & 0xff, H[1] & 0xff, H[2] >> 24 & 0xff, H[2] >> 16 & 0xff, H[2] >> 8 & 0xff, H[2] & 0xff, H[3] >> 24 & 0xff, H[3] >> 16 & 0xff, H[3] >> 8 & 0xff, H[3] & 0xff, H[4] >> 24 & 0xff, H[4] >> 16 & 0xff, H[4] >> 8 & 0xff, H[4] & 0xff];
+}
+
+export default sha1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/stringify.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/stringify.js
new file mode 100644
index 0000000..3102111
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/stringify.js
@@ -0,0 +1,30 @@
+import validate from './validate.js';
+/**
+ * Convert array of 16 byte values to UUID string format of the form:
+ * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
+ */
+
+var byteToHex = [];
+
+for (var i = 0; i < 256; ++i) {
+  byteToHex.push((i + 0x100).toString(16).substr(1));
+}
+
+function stringify(arr) {
+  var offset = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;
+  // Note: Be careful editing this code!  It's been tuned for performance
+  // and works in ways you may not expect. See https://github.com/uuidjs/uuid/pull/434
+  var uuid = (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + '-' + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + '-' + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + '-' + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + '-' + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase(); // Consistency check for valid UUID.  If this throws, it's likely due to one
+  // of the following:
+  // - One or more input array values don't map to a hex octet (leading to
+  // "undefined" in the uuid)
+  // - Invalid input values for the RFC `version` or `variant` fields
+
+  if (!validate(uuid)) {
+    throw TypeError('Stringified UUID is invalid');
+  }
+
+  return uuid;
+}
+
+export default stringify;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v1.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v1.js
new file mode 100644
index 0000000..1a22591
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v1.js
@@ -0,0 +1,95 @@
+import rng from './rng.js';
+import stringify from './stringify.js'; // **`v1()` - Generate time-based UUID**
+//
+// Inspired by https://github.com/LiosK/UUID.js
+// and http://docs.python.org/library/uuid.html
+
+var _nodeId;
+
+var _clockseq; // Previous uuid creation time
+
+
+var _lastMSecs = 0;
+var _lastNSecs = 0; // See https://github.com/uuidjs/uuid for API details
+
+function v1(options, buf, offset) {
+  var i = buf && offset || 0;
+  var b = buf || new Array(16);
+  options = options || {};
+  var node = options.node || _nodeId;
+  var clockseq = options.clockseq !== undefined ? options.clockseq : _clockseq; // node and clockseq need to be initialized to random values if they're not
+  // specified.  We do this lazily to minimize issues related to insufficient
+  // system entropy.  See #189
+
+  if (node == null || clockseq == null) {
+    var seedBytes = options.random || (options.rng || rng)();
+
+    if (node == null) {
+      // Per 4.5, create and 48-bit node id, (47 random bits + multicast bit = 1)
+      node = _nodeId = [seedBytes[0] | 0x01, seedBytes[1], seedBytes[2], seedBytes[3], seedBytes[4], seedBytes[5]];
+    }
+
+    if (clockseq == null) {
+      // Per 4.2.2, randomize (14 bit) clockseq
+      clockseq = _clockseq = (seedBytes[6] << 8 | seedBytes[7]) & 0x3fff;
+    }
+  } // UUID timestamps are 100 nano-second units since the Gregorian epoch,
+  // (1582-10-15 00:00).  JSNumbers aren't precise enough for this, so
+  // time is handled internally as 'msecs' (integer milliseconds) and 'nsecs'
+  // (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01 00:00.
+
+
+  var msecs = options.msecs !== undefined ? options.msecs : Date.now(); // Per 4.2.1.2, use count of uuid's generated during the current clock
+  // cycle to simulate higher resolution clock
+
+  var nsecs = options.nsecs !== undefined ? options.nsecs : _lastNSecs + 1; // Time since last uuid creation (in msecs)
+
+  var dt = msecs - _lastMSecs + (nsecs - _lastNSecs) / 10000; // Per 4.2.1.2, Bump clockseq on clock regression
+
+  if (dt < 0 && options.clockseq === undefined) {
+    clockseq = clockseq + 1 & 0x3fff;
+  } // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
+  // time interval
+
+
+  if ((dt < 0 || msecs > _lastMSecs) && options.nsecs === undefined) {
+    nsecs = 0;
+  } // Per 4.2.1.2 Throw error if too many uuids are requested
+
+
+  if (nsecs >= 10000) {
+    throw new Error("uuid.v1(): Can't create more than 10M uuids/sec");
+  }
+
+  _lastMSecs = msecs;
+  _lastNSecs = nsecs;
+  _clockseq = clockseq; // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
+
+  msecs += 12219292800000; // `time_low`
+
+  var tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
+  b[i++] = tl >>> 24 & 0xff;
+  b[i++] = tl >>> 16 & 0xff;
+  b[i++] = tl >>> 8 & 0xff;
+  b[i++] = tl & 0xff; // `time_mid`
+
+  var tmh = msecs / 0x100000000 * 10000 & 0xfffffff;
+  b[i++] = tmh >>> 8 & 0xff;
+  b[i++] = tmh & 0xff; // `time_high_and_version`
+
+  b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
+
+  b[i++] = tmh >>> 16 & 0xff; // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
+
+  b[i++] = clockseq >>> 8 | 0x80; // `clock_seq_low`
+
+  b[i++] = clockseq & 0xff; // `node`
+
+  for (var n = 0; n < 6; ++n) {
+    b[i + n] = node[n];
+  }
+
+  return buf || stringify(b);
+}
+
+export default v1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v3.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v3.js
new file mode 100644
index 0000000..c9ab9a4
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v3.js
@@ -0,0 +1,4 @@
+import v35 from './v35.js';
+import md5 from './md5.js';
+var v3 = v35('v3', 0x30, md5);
+export default v3;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v35.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v35.js
new file mode 100644
index 0000000..31dd8a1
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v35.js
@@ -0,0 +1,64 @@
+import stringify from './stringify.js';
+import parse from './parse.js';
+
+function stringToBytes(str) {
+  str = unescape(encodeURIComponent(str)); // UTF8 escape
+
+  var bytes = [];
+
+  for (var i = 0; i < str.length; ++i) {
+    bytes.push(str.charCodeAt(i));
+  }
+
+  return bytes;
+}
+
+export var DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
+export var URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';
+export default function (name, version, hashfunc) {
+  function generateUUID(value, namespace, buf, offset) {
+    if (typeof value === 'string') {
+      value = stringToBytes(value);
+    }
+
+    if (typeof namespace === 'string') {
+      namespace = parse(namespace);
+    }
+
+    if (namespace.length !== 16) {
+      throw TypeError('Namespace must be array-like (16 iterable integer values, 0-255)');
+    } // Compute hash of namespace and value, Per 4.3
+    // Future: Use spread syntax when supported on all platforms, e.g. `bytes =
+    // hashfunc([...namespace, ... value])`
+
+
+    var bytes = new Uint8Array(16 + value.length);
+    bytes.set(namespace);
+    bytes.set(value, namespace.length);
+    bytes = hashfunc(bytes);
+    bytes[6] = bytes[6] & 0x0f | version;
+    bytes[8] = bytes[8] & 0x3f | 0x80;
+
+    if (buf) {
+      offset = offset || 0;
+
+      for (var i = 0; i < 16; ++i) {
+        buf[offset + i] = bytes[i];
+      }
+
+      return buf;
+    }
+
+    return stringify(bytes);
+  } // Function#name is not settable on some platforms (#270)
+
+
+  try {
+    generateUUID.name = name; // eslint-disable-next-line no-empty
+  } catch (err) {} // For CommonJS default export support
+
+
+  generateUUID.DNS = DNS;
+  generateUUID.URL = URL;
+  return generateUUID;
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v4.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v4.js
new file mode 100644
index 0000000..404810a
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v4.js
@@ -0,0 +1,24 @@
+import rng from './rng.js';
+import stringify from './stringify.js';
+
+function v4(options, buf, offset) {
+  options = options || {};
+  var rnds = options.random || (options.rng || rng)(); // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
+
+  rnds[6] = rnds[6] & 0x0f | 0x40;
+  rnds[8] = rnds[8] & 0x3f | 0x80; // Copy bytes to buffer, if provided
+
+  if (buf) {
+    offset = offset || 0;
+
+    for (var i = 0; i < 16; ++i) {
+      buf[offset + i] = rnds[i];
+    }
+
+    return buf;
+  }
+
+  return stringify(rnds);
+}
+
+export default v4;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v5.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v5.js
new file mode 100644
index 0000000..c08d96b
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/v5.js
@@ -0,0 +1,4 @@
+import v35 from './v35.js';
+import sha1 from './sha1.js';
+var v5 = v35('v5', 0x50, sha1);
+export default v5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/validate.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/validate.js
new file mode 100644
index 0000000..f1cdc7a
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/validate.js
@@ -0,0 +1,7 @@
+import REGEX from './regex.js';
+
+function validate(uuid) {
+  return typeof uuid === 'string' && REGEX.test(uuid);
+}
+
+export default validate;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/version.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/version.js
new file mode 100644
index 0000000..77530e9
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-browser/version.js
@@ -0,0 +1,11 @@
+import validate from './validate.js';
+
+function version(uuid) {
+  if (!validate(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+
+  return parseInt(uuid.substr(14, 1), 16);
+}
+
+export default version;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/index.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/index.js
new file mode 100644
index 0000000..1db6f6d
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/index.js
@@ -0,0 +1,9 @@
+export { default as v1 } from './v1.js';
+export { default as v3 } from './v3.js';
+export { default as v4 } from './v4.js';
+export { default as v5 } from './v5.js';
+export { default as NIL } from './nil.js';
+export { default as version } from './version.js';
+export { default as validate } from './validate.js';
+export { default as stringify } from './stringify.js';
+export { default as parse } from './parse.js';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/md5.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/md5.js
new file mode 100644
index 0000000..4d68b04
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/md5.js
@@ -0,0 +1,13 @@
+import crypto from 'crypto';
+
+function md5(bytes) {
+  if (Array.isArray(bytes)) {
+    bytes = Buffer.from(bytes);
+  } else if (typeof bytes === 'string') {
+    bytes = Buffer.from(bytes, 'utf8');
+  }
+
+  return crypto.createHash('md5').update(bytes).digest();
+}
+
+export default md5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/nil.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/nil.js
new file mode 100644
index 0000000..b36324c
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/nil.js
@@ -0,0 +1 @@
+export default '00000000-0000-0000-0000-000000000000';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/parse.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/parse.js
new file mode 100644
index 0000000..6421c5d
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/parse.js
@@ -0,0 +1,35 @@
+import validate from './validate.js';
+
+function parse(uuid) {
+  if (!validate(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+
+  let v;
+  const arr = new Uint8Array(16); // Parse ########-....-....-....-............
+
+  arr[0] = (v = parseInt(uuid.slice(0, 8), 16)) >>> 24;
+  arr[1] = v >>> 16 & 0xff;
+  arr[2] = v >>> 8 & 0xff;
+  arr[3] = v & 0xff; // Parse ........-####-....-....-............
+
+  arr[4] = (v = parseInt(uuid.slice(9, 13), 16)) >>> 8;
+  arr[5] = v & 0xff; // Parse ........-....-####-....-............
+
+  arr[6] = (v = parseInt(uuid.slice(14, 18), 16)) >>> 8;
+  arr[7] = v & 0xff; // Parse ........-....-....-####-............
+
+  arr[8] = (v = parseInt(uuid.slice(19, 23), 16)) >>> 8;
+  arr[9] = v & 0xff; // Parse ........-....-....-....-############
+  // (Use "/" to avoid 32-bit truncation when bit-shifting high-order bytes)
+
+  arr[10] = (v = parseInt(uuid.slice(24, 36), 16)) / 0x10000000000 & 0xff;
+  arr[11] = v / 0x100000000 & 0xff;
+  arr[12] = v >>> 24 & 0xff;
+  arr[13] = v >>> 16 & 0xff;
+  arr[14] = v >>> 8 & 0xff;
+  arr[15] = v & 0xff;
+  return arr;
+}
+
+export default parse;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/regex.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/regex.js
new file mode 100644
index 0000000..3da8673
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/regex.js
@@ -0,0 +1 @@
+export default /^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/rng.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/rng.js
new file mode 100644
index 0000000..8006244
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/rng.js
@@ -0,0 +1,12 @@
+import crypto from 'crypto';
+const rnds8Pool = new Uint8Array(256); // # of random values to pre-allocate
+
+let poolPtr = rnds8Pool.length;
+export default function rng() {
+  if (poolPtr > rnds8Pool.length - 16) {
+    crypto.randomFillSync(rnds8Pool);
+    poolPtr = 0;
+  }
+
+  return rnds8Pool.slice(poolPtr, poolPtr += 16);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/sha1.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/sha1.js
new file mode 100644
index 0000000..e23850b
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/sha1.js
@@ -0,0 +1,13 @@
+import crypto from 'crypto';
+
+function sha1(bytes) {
+  if (Array.isArray(bytes)) {
+    bytes = Buffer.from(bytes);
+  } else if (typeof bytes === 'string') {
+    bytes = Buffer.from(bytes, 'utf8');
+  }
+
+  return crypto.createHash('sha1').update(bytes).digest();
+}
+
+export default sha1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/stringify.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/stringify.js
new file mode 100644
index 0000000..f9bca12
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/stringify.js
@@ -0,0 +1,29 @@
+import validate from './validate.js';
+/**
+ * Convert array of 16 byte values to UUID string format of the form:
+ * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
+ */
+
+const byteToHex = [];
+
+for (let i = 0; i < 256; ++i) {
+  byteToHex.push((i + 0x100).toString(16).substr(1));
+}
+
+function stringify(arr, offset = 0) {
+  // Note: Be careful editing this code!  It's been tuned for performance
+  // and works in ways you may not expect. See https://github.com/uuidjs/uuid/pull/434
+  const uuid = (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + '-' + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + '-' + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + '-' + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + '-' + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase(); // Consistency check for valid UUID.  If this throws, it's likely due to one
+  // of the following:
+  // - One or more input array values don't map to a hex octet (leading to
+  // "undefined" in the uuid)
+  // - Invalid input values for the RFC `version` or `variant` fields
+
+  if (!validate(uuid)) {
+    throw TypeError('Stringified UUID is invalid');
+  }
+
+  return uuid;
+}
+
+export default stringify;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v1.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v1.js
new file mode 100644
index 0000000..ebf81ac
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v1.js
@@ -0,0 +1,95 @@
+import rng from './rng.js';
+import stringify from './stringify.js'; // **`v1()` - Generate time-based UUID**
+//
+// Inspired by https://github.com/LiosK/UUID.js
+// and http://docs.python.org/library/uuid.html
+
+let _nodeId;
+
+let _clockseq; // Previous uuid creation time
+
+
+let _lastMSecs = 0;
+let _lastNSecs = 0; // See https://github.com/uuidjs/uuid for API details
+
+function v1(options, buf, offset) {
+  let i = buf && offset || 0;
+  const b = buf || new Array(16);
+  options = options || {};
+  let node = options.node || _nodeId;
+  let clockseq = options.clockseq !== undefined ? options.clockseq : _clockseq; // node and clockseq need to be initialized to random values if they're not
+  // specified.  We do this lazily to minimize issues related to insufficient
+  // system entropy.  See #189
+
+  if (node == null || clockseq == null) {
+    const seedBytes = options.random || (options.rng || rng)();
+
+    if (node == null) {
+      // Per 4.5, create and 48-bit node id, (47 random bits + multicast bit = 1)
+      node = _nodeId = [seedBytes[0] | 0x01, seedBytes[1], seedBytes[2], seedBytes[3], seedBytes[4], seedBytes[5]];
+    }
+
+    if (clockseq == null) {
+      // Per 4.2.2, randomize (14 bit) clockseq
+      clockseq = _clockseq = (seedBytes[6] << 8 | seedBytes[7]) & 0x3fff;
+    }
+  } // UUID timestamps are 100 nano-second units since the Gregorian epoch,
+  // (1582-10-15 00:00).  JSNumbers aren't precise enough for this, so
+  // time is handled internally as 'msecs' (integer milliseconds) and 'nsecs'
+  // (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01 00:00.
+
+
+  let msecs = options.msecs !== undefined ? options.msecs : Date.now(); // Per 4.2.1.2, use count of uuid's generated during the current clock
+  // cycle to simulate higher resolution clock
+
+  let nsecs = options.nsecs !== undefined ? options.nsecs : _lastNSecs + 1; // Time since last uuid creation (in msecs)
+
+  const dt = msecs - _lastMSecs + (nsecs - _lastNSecs) / 10000; // Per 4.2.1.2, Bump clockseq on clock regression
+
+  if (dt < 0 && options.clockseq === undefined) {
+    clockseq = clockseq + 1 & 0x3fff;
+  } // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
+  // time interval
+
+
+  if ((dt < 0 || msecs > _lastMSecs) && options.nsecs === undefined) {
+    nsecs = 0;
+  } // Per 4.2.1.2 Throw error if too many uuids are requested
+
+
+  if (nsecs >= 10000) {
+    throw new Error("uuid.v1(): Can't create more than 10M uuids/sec");
+  }
+
+  _lastMSecs = msecs;
+  _lastNSecs = nsecs;
+  _clockseq = clockseq; // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
+
+  msecs += 12219292800000; // `time_low`
+
+  const tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
+  b[i++] = tl >>> 24 & 0xff;
+  b[i++] = tl >>> 16 & 0xff;
+  b[i++] = tl >>> 8 & 0xff;
+  b[i++] = tl & 0xff; // `time_mid`
+
+  const tmh = msecs / 0x100000000 * 10000 & 0xfffffff;
+  b[i++] = tmh >>> 8 & 0xff;
+  b[i++] = tmh & 0xff; // `time_high_and_version`
+
+  b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
+
+  b[i++] = tmh >>> 16 & 0xff; // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
+
+  b[i++] = clockseq >>> 8 | 0x80; // `clock_seq_low`
+
+  b[i++] = clockseq & 0xff; // `node`
+
+  for (let n = 0; n < 6; ++n) {
+    b[i + n] = node[n];
+  }
+
+  return buf || stringify(b);
+}
+
+export default v1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v3.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v3.js
new file mode 100644
index 0000000..09063b8
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v3.js
@@ -0,0 +1,4 @@
+import v35 from './v35.js';
+import md5 from './md5.js';
+const v3 = v35('v3', 0x30, md5);
+export default v3;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v35.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v35.js
new file mode 100644
index 0000000..22f6a19
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v35.js
@@ -0,0 +1,64 @@
+import stringify from './stringify.js';
+import parse from './parse.js';
+
+function stringToBytes(str) {
+  str = unescape(encodeURIComponent(str)); // UTF8 escape
+
+  const bytes = [];
+
+  for (let i = 0; i < str.length; ++i) {
+    bytes.push(str.charCodeAt(i));
+  }
+
+  return bytes;
+}
+
+export const DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
+export const URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';
+export default function (name, version, hashfunc) {
+  function generateUUID(value, namespace, buf, offset) {
+    if (typeof value === 'string') {
+      value = stringToBytes(value);
+    }
+
+    if (typeof namespace === 'string') {
+      namespace = parse(namespace);
+    }
+
+    if (namespace.length !== 16) {
+      throw TypeError('Namespace must be array-like (16 iterable integer values, 0-255)');
+    } // Compute hash of namespace and value, Per 4.3
+    // Future: Use spread syntax when supported on all platforms, e.g. `bytes =
+    // hashfunc([...namespace, ... value])`
+
+
+    let bytes = new Uint8Array(16 + value.length);
+    bytes.set(namespace);
+    bytes.set(value, namespace.length);
+    bytes = hashfunc(bytes);
+    bytes[6] = bytes[6] & 0x0f | version;
+    bytes[8] = bytes[8] & 0x3f | 0x80;
+
+    if (buf) {
+      offset = offset || 0;
+
+      for (let i = 0; i < 16; ++i) {
+        buf[offset + i] = bytes[i];
+      }
+
+      return buf;
+    }
+
+    return stringify(bytes);
+  } // Function#name is not settable on some platforms (#270)
+
+
+  try {
+    generateUUID.name = name; // eslint-disable-next-line no-empty
+  } catch (err) {} // For CommonJS default export support
+
+
+  generateUUID.DNS = DNS;
+  generateUUID.URL = URL;
+  return generateUUID;
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v4.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v4.js
new file mode 100644
index 0000000..efad926
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v4.js
@@ -0,0 +1,24 @@
+import rng from './rng.js';
+import stringify from './stringify.js';
+
+function v4(options, buf, offset) {
+  options = options || {};
+  const rnds = options.random || (options.rng || rng)(); // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
+
+  rnds[6] = rnds[6] & 0x0f | 0x40;
+  rnds[8] = rnds[8] & 0x3f | 0x80; // Copy bytes to buffer, if provided
+
+  if (buf) {
+    offset = offset || 0;
+
+    for (let i = 0; i < 16; ++i) {
+      buf[offset + i] = rnds[i];
+    }
+
+    return buf;
+  }
+
+  return stringify(rnds);
+}
+
+export default v4;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v5.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v5.js
new file mode 100644
index 0000000..e87fe31
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/v5.js
@@ -0,0 +1,4 @@
+import v35 from './v35.js';
+import sha1 from './sha1.js';
+const v5 = v35('v5', 0x50, sha1);
+export default v5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/validate.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/validate.js
new file mode 100644
index 0000000..f1cdc7a
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/validate.js
@@ -0,0 +1,7 @@
+import REGEX from './regex.js';
+
+function validate(uuid) {
+  return typeof uuid === 'string' && REGEX.test(uuid);
+}
+
+export default validate;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/version.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/version.js
new file mode 100644
index 0000000..77530e9
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/esm-node/version.js
@@ -0,0 +1,11 @@
+import validate from './validate.js';
+
+function version(uuid) {
+  if (!validate(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+
+  return parseInt(uuid.substr(14, 1), 16);
+}
+
+export default version;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/index.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/index.js
new file mode 100644
index 0000000..bf13b10
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/index.js
@@ -0,0 +1,79 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+Object.defineProperty(exports, "v1", {
+  enumerable: true,
+  get: function () {
+    return _v.default;
+  }
+});
+Object.defineProperty(exports, "v3", {
+  enumerable: true,
+  get: function () {
+    return _v2.default;
+  }
+});
+Object.defineProperty(exports, "v4", {
+  enumerable: true,
+  get: function () {
+    return _v3.default;
+  }
+});
+Object.defineProperty(exports, "v5", {
+  enumerable: true,
+  get: function () {
+    return _v4.default;
+  }
+});
+Object.defineProperty(exports, "NIL", {
+  enumerable: true,
+  get: function () {
+    return _nil.default;
+  }
+});
+Object.defineProperty(exports, "version", {
+  enumerable: true,
+  get: function () {
+    return _version.default;
+  }
+});
+Object.defineProperty(exports, "validate", {
+  enumerable: true,
+  get: function () {
+    return _validate.default;
+  }
+});
+Object.defineProperty(exports, "stringify", {
+  enumerable: true,
+  get: function () {
+    return _stringify.default;
+  }
+});
+Object.defineProperty(exports, "parse", {
+  enumerable: true,
+  get: function () {
+    return _parse.default;
+  }
+});
+
+var _v = _interopRequireDefault(require("./v1.js"));
+
+var _v2 = _interopRequireDefault(require("./v3.js"));
+
+var _v3 = _interopRequireDefault(require("./v4.js"));
+
+var _v4 = _interopRequireDefault(require("./v5.js"));
+
+var _nil = _interopRequireDefault(require("./nil.js"));
+
+var _version = _interopRequireDefault(require("./version.js"));
+
+var _validate = _interopRequireDefault(require("./validate.js"));
+
+var _stringify = _interopRequireDefault(require("./stringify.js"));
+
+var _parse = _interopRequireDefault(require("./parse.js"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/md5-browser.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/md5-browser.js
new file mode 100644
index 0000000..7a4582a
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/md5-browser.js
@@ -0,0 +1,223 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+/*
+ * Browser-compatible JavaScript MD5
+ *
+ * Modification of JavaScript MD5
+ * https://github.com/blueimp/JavaScript-MD5
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ *
+ * Based on
+ * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+ * Digest Algorithm, as defined in RFC 1321.
+ * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for more info.
+ */
+function md5(bytes) {
+  if (typeof bytes === 'string') {
+    const msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
+
+    bytes = new Uint8Array(msg.length);
+
+    for (let i = 0; i < msg.length; ++i) {
+      bytes[i] = msg.charCodeAt(i);
+    }
+  }
+
+  return md5ToHexEncodedArray(wordsToMd5(bytesToWords(bytes), bytes.length * 8));
+}
+/*
+ * Convert an array of little-endian words to an array of bytes
+ */
+
+
+function md5ToHexEncodedArray(input) {
+  const output = [];
+  const length32 = input.length * 32;
+  const hexTab = '0123456789abcdef';
+
+  for (let i = 0; i < length32; i += 8) {
+    const x = input[i >> 5] >>> i % 32 & 0xff;
+    const hex = parseInt(hexTab.charAt(x >>> 4 & 0x0f) + hexTab.charAt(x & 0x0f), 16);
+    output.push(hex);
+  }
+
+  return output;
+}
+/**
+ * Calculate output length with padding and bit length
+ */
+
+
+function getOutputLength(inputLength8) {
+  return (inputLength8 + 64 >>> 9 << 4) + 14 + 1;
+}
+/*
+ * Calculate the MD5 of an array of little-endian words, and a bit length.
+ */
+
+
+function wordsToMd5(x, len) {
+  /* append padding */
+  x[len >> 5] |= 0x80 << len % 32;
+  x[getOutputLength(len) - 1] = len;
+  let a = 1732584193;
+  let b = -271733879;
+  let c = -1732584194;
+  let d = 271733878;
+
+  for (let i = 0; i < x.length; i += 16) {
+    const olda = a;
+    const oldb = b;
+    const oldc = c;
+    const oldd = d;
+    a = md5ff(a, b, c, d, x[i], 7, -680876936);
+    d = md5ff(d, a, b, c, x[i + 1], 12, -389564586);
+    c = md5ff(c, d, a, b, x[i + 2], 17, 606105819);
+    b = md5ff(b, c, d, a, x[i + 3], 22, -1044525330);
+    a = md5ff(a, b, c, d, x[i + 4], 7, -176418897);
+    d = md5ff(d, a, b, c, x[i + 5], 12, 1200080426);
+    c = md5ff(c, d, a, b, x[i + 6], 17, -1473231341);
+    b = md5ff(b, c, d, a, x[i + 7], 22, -45705983);
+    a = md5ff(a, b, c, d, x[i + 8], 7, 1770035416);
+    d = md5ff(d, a, b, c, x[i + 9], 12, -1958414417);
+    c = md5ff(c, d, a, b, x[i + 10], 17, -42063);
+    b = md5ff(b, c, d, a, x[i + 11], 22, -1990404162);
+    a = md5ff(a, b, c, d, x[i + 12], 7, 1804603682);
+    d = md5ff(d, a, b, c, x[i + 13], 12, -40341101);
+    c = md5ff(c, d, a, b, x[i + 14], 17, -1502002290);
+    b = md5ff(b, c, d, a, x[i + 15], 22, 1236535329);
+    a = md5gg(a, b, c, d, x[i + 1], 5, -165796510);
+    d = md5gg(d, a, b, c, x[i + 6], 9, -1069501632);
+    c = md5gg(c, d, a, b, x[i + 11], 14, 643717713);
+    b = md5gg(b, c, d, a, x[i], 20, -373897302);
+    a = md5gg(a, b, c, d, x[i + 5], 5, -701558691);
+    d = md5gg(d, a, b, c, x[i + 10], 9, 38016083);
+    c = md5gg(c, d, a, b, x[i + 15], 14, -660478335);
+    b = md5gg(b, c, d, a, x[i + 4], 20, -405537848);
+    a = md5gg(a, b, c, d, x[i + 9], 5, 568446438);
+    d = md5gg(d, a, b, c, x[i + 14], 9, -1019803690);
+    c = md5gg(c, d, a, b, x[i + 3], 14, -187363961);
+    b = md5gg(b, c, d, a, x[i + 8], 20, 1163531501);
+    a = md5gg(a, b, c, d, x[i + 13], 5, -1444681467);
+    d = md5gg(d, a, b, c, x[i + 2], 9, -51403784);
+    c = md5gg(c, d, a, b, x[i + 7], 14, 1735328473);
+    b = md5gg(b, c, d, a, x[i + 12], 20, -1926607734);
+    a = md5hh(a, b, c, d, x[i + 5], 4, -378558);
+    d = md5hh(d, a, b, c, x[i + 8], 11, -2022574463);
+    c = md5hh(c, d, a, b, x[i + 11], 16, 1839030562);
+    b = md5hh(b, c, d, a, x[i + 14], 23, -35309556);
+    a = md5hh(a, b, c, d, x[i + 1], 4, -1530992060);
+    d = md5hh(d, a, b, c, x[i + 4], 11, 1272893353);
+    c = md5hh(c, d, a, b, x[i + 7], 16, -155497632);
+    b = md5hh(b, c, d, a, x[i + 10], 23, -1094730640);
+    a = md5hh(a, b, c, d, x[i + 13], 4, 681279174);
+    d = md5hh(d, a, b, c, x[i], 11, -358537222);
+    c = md5hh(c, d, a, b, x[i + 3], 16, -722521979);
+    b = md5hh(b, c, d, a, x[i + 6], 23, 76029189);
+    a = md5hh(a, b, c, d, x[i + 9], 4, -640364487);
+    d = md5hh(d, a, b, c, x[i + 12], 11, -421815835);
+    c = md5hh(c, d, a, b, x[i + 15], 16, 530742520);
+    b = md5hh(b, c, d, a, x[i + 2], 23, -995338651);
+    a = md5ii(a, b, c, d, x[i], 6, -198630844);
+    d = md5ii(d, a, b, c, x[i + 7], 10, 1126891415);
+    c = md5ii(c, d, a, b, x[i + 14], 15, -1416354905);
+    b = md5ii(b, c, d, a, x[i + 5], 21, -57434055);
+    a = md5ii(a, b, c, d, x[i + 12], 6, 1700485571);
+    d = md5ii(d, a, b, c, x[i + 3], 10, -1894986606);
+    c = md5ii(c, d, a, b, x[i + 10], 15, -1051523);
+    b = md5ii(b, c, d, a, x[i + 1], 21, -2054922799);
+    a = md5ii(a, b, c, d, x[i + 8], 6, 1873313359);
+    d = md5ii(d, a, b, c, x[i + 15], 10, -30611744);
+    c = md5ii(c, d, a, b, x[i + 6], 15, -1560198380);
+    b = md5ii(b, c, d, a, x[i + 13], 21, 1309151649);
+    a = md5ii(a, b, c, d, x[i + 4], 6, -145523070);
+    d = md5ii(d, a, b, c, x[i + 11], 10, -1120210379);
+    c = md5ii(c, d, a, b, x[i + 2], 15, 718787259);
+    b = md5ii(b, c, d, a, x[i + 9], 21, -343485551);
+    a = safeAdd(a, olda);
+    b = safeAdd(b, oldb);
+    c = safeAdd(c, oldc);
+    d = safeAdd(d, oldd);
+  }
+
+  return [a, b, c, d];
+}
+/*
+ * Convert an array bytes to an array of little-endian words
+ * Characters >255 have their high-byte silently ignored.
+ */
+
+
+function bytesToWords(input) {
+  if (input.length === 0) {
+    return [];
+  }
+
+  const length8 = input.length * 8;
+  const output = new Uint32Array(getOutputLength(length8));
+
+  for (let i = 0; i < length8; i += 8) {
+    output[i >> 5] |= (input[i / 8] & 0xff) << i % 32;
+  }
+
+  return output;
+}
+/*
+ * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+ * to work around bugs in some JS interpreters.
+ */
+
+
+function safeAdd(x, y) {
+  const lsw = (x & 0xffff) + (y & 0xffff);
+  const msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+  return msw << 16 | lsw & 0xffff;
+}
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+
+
+function bitRotateLeft(num, cnt) {
+  return num << cnt | num >>> 32 - cnt;
+}
+/*
+ * These functions implement the four basic operations the algorithm uses.
+ */
+
+
+function md5cmn(q, a, b, x, s, t) {
+  return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b);
+}
+
+function md5ff(a, b, c, d, x, s, t) {
+  return md5cmn(b & c | ~b & d, a, b, x, s, t);
+}
+
+function md5gg(a, b, c, d, x, s, t) {
+  return md5cmn(b & d | c & ~d, a, b, x, s, t);
+}
+
+function md5hh(a, b, c, d, x, s, t) {
+  return md5cmn(b ^ c ^ d, a, b, x, s, t);
+}
+
+function md5ii(a, b, c, d, x, s, t) {
+  return md5cmn(c ^ (b | ~d), a, b, x, s, t);
+}
+
+var _default = md5;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/md5.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/md5.js
new file mode 100644
index 0000000..824d481
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/md5.js
@@ -0,0 +1,23 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _crypto = _interopRequireDefault(require("crypto"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function md5(bytes) {
+  if (Array.isArray(bytes)) {
+    bytes = Buffer.from(bytes);
+  } else if (typeof bytes === 'string') {
+    bytes = Buffer.from(bytes, 'utf8');
+  }
+
+  return _crypto.default.createHash('md5').update(bytes).digest();
+}
+
+var _default = md5;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/nil.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/nil.js
new file mode 100644
index 0000000..7ade577
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/nil.js
@@ -0,0 +1,8 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _default = '00000000-0000-0000-0000-000000000000';
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/parse.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/parse.js
new file mode 100644
index 0000000..4c69fc3
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/parse.js
@@ -0,0 +1,45 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _validate = _interopRequireDefault(require("./validate.js"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function parse(uuid) {
+  if (!(0, _validate.default)(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+
+  let v;
+  const arr = new Uint8Array(16); // Parse ########-....-....-....-............
+
+  arr[0] = (v = parseInt(uuid.slice(0, 8), 16)) >>> 24;
+  arr[1] = v >>> 16 & 0xff;
+  arr[2] = v >>> 8 & 0xff;
+  arr[3] = v & 0xff; // Parse ........-####-....-....-............
+
+  arr[4] = (v = parseInt(uuid.slice(9, 13), 16)) >>> 8;
+  arr[5] = v & 0xff; // Parse ........-....-####-....-............
+
+  arr[6] = (v = parseInt(uuid.slice(14, 18), 16)) >>> 8;
+  arr[7] = v & 0xff; // Parse ........-....-....-####-............
+
+  arr[8] = (v = parseInt(uuid.slice(19, 23), 16)) >>> 8;
+  arr[9] = v & 0xff; // Parse ........-....-....-....-############
+  // (Use "/" to avoid 32-bit truncation when bit-shifting high-order bytes)
+
+  arr[10] = (v = parseInt(uuid.slice(24, 36), 16)) / 0x10000000000 & 0xff;
+  arr[11] = v / 0x100000000 & 0xff;
+  arr[12] = v >>> 24 & 0xff;
+  arr[13] = v >>> 16 & 0xff;
+  arr[14] = v >>> 8 & 0xff;
+  arr[15] = v & 0xff;
+  return arr;
+}
+
+var _default = parse;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/regex.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/regex.js
new file mode 100644
index 0000000..1ef91d6
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/regex.js
@@ -0,0 +1,8 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _default = /^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/rng-browser.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/rng-browser.js
new file mode 100644
index 0000000..91faeae
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/rng-browser.js
@@ -0,0 +1,26 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = rng;
+// Unique ID creation requires a high quality random # generator. In the browser we therefore
+// require the crypto API and do not support built-in fallback to lower quality random number
+// generators (like Math.random()).
+let getRandomValues;
+const rnds8 = new Uint8Array(16);
+
+function rng() {
+  // lazy load so that environments that need to polyfill have a chance to do so
+  if (!getRandomValues) {
+    // getRandomValues needs to be invoked in a context where "this" is a Crypto implementation. Also,
+    // find the complete implementation of crypto (msCrypto) on IE11.
+    getRandomValues = typeof crypto !== 'undefined' && crypto.getRandomValues && crypto.getRandomValues.bind(crypto) || typeof msCrypto !== 'undefined' && typeof msCrypto.getRandomValues === 'function' && msCrypto.getRandomValues.bind(msCrypto);
+
+    if (!getRandomValues) {
+      throw new Error('crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported');
+    }
+  }
+
+  return getRandomValues(rnds8);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/rng.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/rng.js
new file mode 100644
index 0000000..3507f93
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/rng.js
@@ -0,0 +1,24 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = rng;
+
+var _crypto = _interopRequireDefault(require("crypto"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+const rnds8Pool = new Uint8Array(256); // # of random values to pre-allocate
+
+let poolPtr = rnds8Pool.length;
+
+function rng() {
+  if (poolPtr > rnds8Pool.length - 16) {
+    _crypto.default.randomFillSync(rnds8Pool);
+
+    poolPtr = 0;
+  }
+
+  return rnds8Pool.slice(poolPtr, poolPtr += 16);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/sha1-browser.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/sha1-browser.js
new file mode 100644
index 0000000..24cbced
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/sha1-browser.js
@@ -0,0 +1,104 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+// Adapted from Chris Veness' SHA1 code at
+// http://www.movable-type.co.uk/scripts/sha1.html
+function f(s, x, y, z) {
+  switch (s) {
+    case 0:
+      return x & y ^ ~x & z;
+
+    case 1:
+      return x ^ y ^ z;
+
+    case 2:
+      return x & y ^ x & z ^ y & z;
+
+    case 3:
+      return x ^ y ^ z;
+  }
+}
+
+function ROTL(x, n) {
+  return x << n | x >>> 32 - n;
+}
+
+function sha1(bytes) {
+  const K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];
+  const H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];
+
+  if (typeof bytes === 'string') {
+    const msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
+
+    bytes = [];
+
+    for (let i = 0; i < msg.length; ++i) {
+      bytes.push(msg.charCodeAt(i));
+    }
+  } else if (!Array.isArray(bytes)) {
+    // Convert Array-like to Array
+    bytes = Array.prototype.slice.call(bytes);
+  }
+
+  bytes.push(0x80);
+  const l = bytes.length / 4 + 2;
+  const N = Math.ceil(l / 16);
+  const M = new Array(N);
+
+  for (let i = 0; i < N; ++i) {
+    const arr = new Uint32Array(16);
+
+    for (let j = 0; j < 16; ++j) {
+      arr[j] = bytes[i * 64 + j * 4] << 24 | bytes[i * 64 + j * 4 + 1] << 16 | bytes[i * 64 + j * 4 + 2] << 8 | bytes[i * 64 + j * 4 + 3];
+    }
+
+    M[i] = arr;
+  }
+
+  M[N - 1][14] = (bytes.length - 1) * 8 / Math.pow(2, 32);
+  M[N - 1][14] = Math.floor(M[N - 1][14]);
+  M[N - 1][15] = (bytes.length - 1) * 8 & 0xffffffff;
+
+  for (let i = 0; i < N; ++i) {
+    const W = new Uint32Array(80);
+
+    for (let t = 0; t < 16; ++t) {
+      W[t] = M[i][t];
+    }
+
+    for (let t = 16; t < 80; ++t) {
+      W[t] = ROTL(W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16], 1);
+    }
+
+    let a = H[0];
+    let b = H[1];
+    let c = H[2];
+    let d = H[3];
+    let e = H[4];
+
+    for (let t = 0; t < 80; ++t) {
+      const s = Math.floor(t / 20);
+      const T = ROTL(a, 5) + f(s, b, c, d) + e + K[s] + W[t] >>> 0;
+      e = d;
+      d = c;
+      c = ROTL(b, 30) >>> 0;
+      b = a;
+      a = T;
+    }
+
+    H[0] = H[0] + a >>> 0;
+    H[1] = H[1] + b >>> 0;
+    H[2] = H[2] + c >>> 0;
+    H[3] = H[3] + d >>> 0;
+    H[4] = H[4] + e >>> 0;
+  }
+
+  return [H[0] >> 24 & 0xff, H[0] >> 16 & 0xff, H[0] >> 8 & 0xff, H[0] & 0xff, H[1] >> 24 & 0xff, H[1] >> 16 & 0xff, H[1] >> 8 & 0xff, H[1] & 0xff, H[2] >> 24 & 0xff, H[2] >> 16 & 0xff, H[2] >> 8 & 0xff, H[2] & 0xff, H[3] >> 24 & 0xff, H[3] >> 16 & 0xff, H[3] >> 8 & 0xff, H[3] & 0xff, H[4] >> 24 & 0xff, H[4] >> 16 & 0xff, H[4] >> 8 & 0xff, H[4] & 0xff];
+}
+
+var _default = sha1;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/sha1.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/sha1.js
new file mode 100644
index 0000000..03bdd63
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/sha1.js
@@ -0,0 +1,23 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _crypto = _interopRequireDefault(require("crypto"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function sha1(bytes) {
+  if (Array.isArray(bytes)) {
+    bytes = Buffer.from(bytes);
+  } else if (typeof bytes === 'string') {
+    bytes = Buffer.from(bytes, 'utf8');
+  }
+
+  return _crypto.default.createHash('sha1').update(bytes).digest();
+}
+
+var _default = sha1;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/stringify.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/stringify.js
new file mode 100644
index 0000000..b8e7519
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/stringify.js
@@ -0,0 +1,39 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _validate = _interopRequireDefault(require("./validate.js"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+/**
+ * Convert array of 16 byte values to UUID string format of the form:
+ * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
+ */
+const byteToHex = [];
+
+for (let i = 0; i < 256; ++i) {
+  byteToHex.push((i + 0x100).toString(16).substr(1));
+}
+
+function stringify(arr, offset = 0) {
+  // Note: Be careful editing this code!  It's been tuned for performance
+  // and works in ways you may not expect. See https://github.com/uuidjs/uuid/pull/434
+  const uuid = (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + '-' + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + '-' + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + '-' + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + '-' + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase(); // Consistency check for valid UUID.  If this throws, it's likely due to one
+  // of the following:
+  // - One or more input array values don't map to a hex octet (leading to
+  // "undefined" in the uuid)
+  // - Invalid input values for the RFC `version` or `variant` fields
+
+  if (!(0, _validate.default)(uuid)) {
+    throw TypeError('Stringified UUID is invalid');
+  }
+
+  return uuid;
+}
+
+var _default = stringify;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuid.min.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuid.min.js
new file mode 100644
index 0000000..639ca2f
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuid.min.js
@@ -0,0 +1 @@
+!function(r,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e((r="undefined"!=typeof globalThis?globalThis:r||self).uuid={})}(this,(function(r){"use strict";var e,n=new Uint8Array(16);function t(){if(!e&&!(e="undefined"!=typeof crypto&&crypto.getRandomValues&&crypto.getRandomValues.bind(crypto)||"undefined"!=typeof msCrypto&&"function"==typeof msCrypto.getRandomValues&&msCrypto.getRandomValues.bind(msCrypto)))throw new Error("crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported");return e(n)}var o=/^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;function a(r){return"string"==typeof r&&o.test(r)}for(var i,u,f=[],s=0;s<256;++s)f.push((s+256).toString(16).substr(1));function c(r){var e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:0,n=(f[r[e+0]]+f[r[e+1]]+f[r[e+2]]+f[r[e+3]]+"-"+f[r[e+4]]+f[r[e+5]]+"-"+f[r[e+6]]+f[r[e+7]]+"-"+f[r[e+8]]+f[r[e+9]]+"-"+f[r[e+10]]+f[r[e+11]]+f[r[e+12]]+f[r[e+13]]+f[r[e+14]]+f[r[e+15]]).toLowerCase();if(!a(n))throw TypeError("Stringified UUID is invalid");return n}var l=0,d=0;function v(r){if(!a(r))throw TypeError("Invalid UUID");var e,n=new Uint8Array(16);return n[0]=(e=parseInt(r.slice(0,8),16))>>>24,n[1]=e>>>16&255,n[2]=e>>>8&255,n[3]=255&e,n[4]=(e=parseInt(r.slice(9,13),16))>>>8,n[5]=255&e,n[6]=(e=parseInt(r.slice(14,18),16))>>>8,n[7]=255&e,n[8]=(e=parseInt(r.slice(19,23),16))>>>8,n[9]=255&e,n[10]=(e=parseInt(r.slice(24,36),16))/1099511627776&255,n[11]=e/4294967296&255,n[12]=e>>>24&255,n[13]=e>>>16&255,n[14]=e>>>8&255,n[15]=255&e,n}function p(r,e,n){function t(r,t,o,a){if("string"==typeof r&&(r=function(r){r=unescape(encodeURIComponent(r));for(var e=[],n=0;n<r.length;++n)e.push(r.charCodeAt(n));return e}(r)),"string"==typeof t&&(t=v(t)),16!==t.length)throw TypeError("Namespace must be array-like (16 iterable integer values, 0-255)");var i=new Uint8Array(16+r.length);if(i.set(t),i.set(r,t.length),(i=n(i))[6]=15&i[6]|e,i[8]=63&i[8]|128,o){a=a||0;for(var u=0;u<16;++u)o[a+u]=i[u];return o}return c(i)}try{t.name=r}catch(r){}return t.DNS="6ba7b810-9dad-11d1-80b4-00c04fd430c8",t.URL="6ba7b811-9dad-11d1-80b4-00c04fd430c8",t}function h(r){return 14+(r+64>>>9<<4)+1}function y(r,e){var n=(65535&r)+(65535&e);return(r>>16)+(e>>16)+(n>>16)<<16|65535&n}function g(r,e,n,t,o,a){return y((i=y(y(e,r),y(t,a)))<<(u=o)|i>>>32-u,n);var i,u}function m(r,e,n,t,o,a,i){return g(e&n|~e&t,r,e,o,a,i)}function w(r,e,n,t,o,a,i){return g(e&t|n&~t,r,e,o,a,i)}function b(r,e,n,t,o,a,i){return g(e^n^t,r,e,o,a,i)}function A(r,e,n,t,o,a,i){return g(n^(e|~t),r,e,o,a,i)}var U=p("v3",48,(function(r){if("string"==typeof r){var e=unescape(encodeURIComponent(r));r=new Uint8Array(e.length);for(var n=0;n<e.length;++n)r[n]=e.charCodeAt(n)}return function(r){for(var e=[],n=32*r.length,t="0123456789abcdef",o=0;o<n;o+=8){var a=r[o>>5]>>>o%32&255,i=parseInt(t.charAt(a>>>4&15)+t.charAt(15&a),16);e.push(i)}return e}(function(r,e){r[e>>5]|=128<<e%32,r[h(e)-1]=e;for(var n=1732584193,t=-271733879,o=-1732584194,a=271733878,i=0;i<r.length;i+=16){var u=n,f=t,s=o,c=a;n=m(n,t,o,a,r[i],7,-680876936),a=m(a,n,t,o,r[i+1],12,-389564586),o=m(o,a,n,t,r[i+2],17,606105819),t=m(t,o,a,n,r[i+3],22,-1044525330),n=m(n,t,o,a,r[i+4],7,-176418897),a=m(a,n,t,o,r[i+5],12,1200080426),o=m(o,a,n,t,r[i+6],17,-1473231341),t=m(t,o,a,n,r[i+7],22,-45705983),n=m(n,t,o,a,r[i+8],7,1770035416),a=m(a,n,t,o,r[i+9],12,-1958414417),o=m(o,a,n,t,r[i+10],17,-42063),t=m(t,o,a,n,r[i+11],22,-1990404162),n=m(n,t,o,a,r[i+12],7,1804603682),a=m(a,n,t,o,r[i+13],12,-40341101),o=m(o,a,n,t,r[i+14],17,-1502002290),n=w(n,t=m(t,o,a,n,r[i+15],22,1236535329),o,a,r[i+1],5,-165796510),a=w(a,n,t,o,r[i+6],9,-1069501632),o=w(o,a,n,t,r[i+11],14,643717713),t=w(t,o,a,n,r[i],20,-373897302),n=w(n,t,o,a,r[i+5],5,-701558691),a=w(a,n,t,o,r[i+10],9,38016083),o=w(o,a,n,t,r[i+15],14,-660478335),t=w(t,o,a,n,r[i+4],20,-405537848),n=w(n,t,o,a,r[i+9],5,568446438),a=w(a,n,t,o,r[i+14],9,-1019803690),o=w(o,a,n,t,r[i+3],14,-187363961),t=w(t,o,a,n,r[i+8],20,1163531501),n=w(n,t,o,a,r[i+13],5,-1444681467),a=w(a,n,t,o,r[i+2],9,-51403784),o=w(o,a,n,t,r[i+7],14,1735328473),n=b(n,t=w(t,o,a,n,r[i+12],20,-1926607734),o,a,r[i+5],4,-378558),a=b(a,n,t,o,r[i+8],11,-2022574463),o=b(o,a,n,t,r[i+11],16,1839030562),t=b(t,o,a,n,r[i+14],23,-35309556),n=b(n,t,o,a,r[i+1],4,-1530992060),a=b(a,n,t,o,r[i+4],11,1272893353),o=b(o,a,n,t,r[i+7],16,-155497632),t=b(t,o,a,n,r[i+10],23,-1094730640),n=b(n,t,o,a,r[i+13],4,681279174),a=b(a,n,t,o,r[i],11,-358537222),o=b(o,a,n,t,r[i+3],16,-722521979),t=b(t,o,a,n,r[i+6],23,76029189),n=b(n,t,o,a,r[i+9],4,-640364487),a=b(a,n,t,o,r[i+12],11,-421815835),o=b(o,a,n,t,r[i+15],16,530742520),n=A(n,t=b(t,o,a,n,r[i+2],23,-995338651),o,a,r[i],6,-198630844),a=A(a,n,t,o,r[i+7],10,1126891415),o=A(o,a,n,t,r[i+14],15,-1416354905),t=A(t,o,a,n,r[i+5],21,-57434055),n=A(n,t,o,a,r[i+12],6,1700485571),a=A(a,n,t,o,r[i+3],10,-1894986606),o=A(o,a,n,t,r[i+10],15,-1051523),t=A(t,o,a,n,r[i+1],21,-2054922799),n=A(n,t,o,a,r[i+8],6,1873313359),a=A(a,n,t,o,r[i+15],10,-30611744),o=A(o,a,n,t,r[i+6],15,-1560198380),t=A(t,o,a,n,r[i+13],21,1309151649),n=A(n,t,o,a,r[i+4],6,-145523070),a=A(a,n,t,o,r[i+11],10,-1120210379),o=A(o,a,n,t,r[i+2],15,718787259),t=A(t,o,a,n,r[i+9],21,-343485551),n=y(n,u),t=y(t,f),o=y(o,s),a=y(a,c)}return[n,t,o,a]}(function(r){if(0===r.length)return[];for(var e=8*r.length,n=new Uint32Array(h(e)),t=0;t<e;t+=8)n[t>>5]|=(255&r[t/8])<<t%32;return n}(r),8*r.length))}));function I(r,e,n,t){switch(r){case 0:return e&n^~e&t;case 1:return e^n^t;case 2:return e&n^e&t^n&t;case 3:return e^n^t}}function C(r,e){return r<<e|r>>>32-e}var R=p("v5",80,(function(r){var e=[1518500249,1859775393,2400959708,3395469782],n=[1732584193,4023233417,2562383102,271733878,3285377520];if("string"==typeof r){var t=unescape(encodeURIComponent(r));r=[];for(var o=0;o<t.length;++o)r.push(t.charCodeAt(o))}else Array.isArray(r)||(r=Array.prototype.slice.call(r));r.push(128);for(var a=r.length/4+2,i=Math.ceil(a/16),u=new Array(i),f=0;f<i;++f){for(var s=new Uint32Array(16),c=0;c<16;++c)s[c]=r[64*f+4*c]<<24|r[64*f+4*c+1]<<16|r[64*f+4*c+2]<<8|r[64*f+4*c+3];u[f]=s}u[i-1][14]=8*(r.length-1)/Math.pow(2,32),u[i-1][14]=Math.floor(u[i-1][14]),u[i-1][15]=8*(r.length-1)&4294967295;for(var l=0;l<i;++l){for(var d=new Uint32Array(80),v=0;v<16;++v)d[v]=u[l][v];for(var p=16;p<80;++p)d[p]=C(d[p-3]^d[p-8]^d[p-14]^d[p-16],1);for(var h=n[0],y=n[1],g=n[2],m=n[3],w=n[4],b=0;b<80;++b){var A=Math.floor(b/20),U=C(h,5)+I(A,y,g,m)+w+e[A]+d[b]>>>0;w=m,m=g,g=C(y,30)>>>0,y=h,h=U}n[0]=n[0]+h>>>0,n[1]=n[1]+y>>>0,n[2]=n[2]+g>>>0,n[3]=n[3]+m>>>0,n[4]=n[4]+w>>>0}return[n[0]>>24&255,n[0]>>16&255,n[0]>>8&255,255&n[0],n[1]>>24&255,n[1]>>16&255,n[1]>>8&255,255&n[1],n[2]>>24&255,n[2]>>16&255,n[2]>>8&255,255&n[2],n[3]>>24&255,n[3]>>16&255,n[3]>>8&255,255&n[3],n[4]>>24&255,n[4]>>16&255,n[4]>>8&255,255&n[4]]}));r.NIL="00000000-0000-0000-0000-000000000000",r.parse=v,r.stringify=c,r.v1=function(r,e,n){var o=e&&n||0,a=e||new Array(16),f=(r=r||{}).node||i,s=void 0!==r.clockseq?r.clockseq:u;if(null==f||null==s){var v=r.random||(r.rng||t)();null==f&&(f=i=[1|v[0],v[1],v[2],v[3],v[4],v[5]]),null==s&&(s=u=16383&(v[6]<<8|v[7]))}var p=void 0!==r.msecs?r.msecs:Date.now(),h=void 0!==r.nsecs?r.nsecs:d+1,y=p-l+(h-d)/1e4;if(y<0&&void 0===r.clockseq&&(s=s+1&16383),(y<0||p>l)&&void 0===r.nsecs&&(h=0),h>=1e4)throw new Error("uuid.v1(): Can't create more than 10M uuids/sec");l=p,d=h,u=s;var g=(1e4*(268435455&(p+=122192928e5))+h)%4294967296;a[o++]=g>>>24&255,a[o++]=g>>>16&255,a[o++]=g>>>8&255,a[o++]=255&g;var m=p/4294967296*1e4&268435455;a[o++]=m>>>8&255,a[o++]=255&m,a[o++]=m>>>24&15|16,a[o++]=m>>>16&255,a[o++]=s>>>8|128,a[o++]=255&s;for(var w=0;w<6;++w)a[o+w]=f[w];return e||c(a)},r.v3=U,r.v4=function(r,e,n){var o=(r=r||{}).random||(r.rng||t)();if(o[6]=15&o[6]|64,o[8]=63&o[8]|128,e){n=n||0;for(var a=0;a<16;++a)e[n+a]=o[a];return e}return c(o)},r.v5=R,r.validate=a,r.version=function(r){if(!a(r))throw TypeError("Invalid UUID");return parseInt(r.substr(14,1),16)},Object.defineProperty(r,"__esModule",{value:!0})}));
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidNIL.min.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidNIL.min.js
new file mode 100644
index 0000000..30b28a7
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidNIL.min.js
@@ -0,0 +1 @@
+!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?module.exports=n():"function"==typeof define&&define.amd?define(n):(e="undefined"!=typeof globalThis?globalThis:e||self).uuidNIL=n()}(this,(function(){"use strict";return"00000000-0000-0000-0000-000000000000"}));
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidParse.min.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidParse.min.js
new file mode 100644
index 0000000..d48ea6a
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidParse.min.js
@@ -0,0 +1 @@
+!function(e,n){"object"==typeof exports&&"undefined"!=typeof module?module.exports=n():"function"==typeof define&&define.amd?define(n):(e="undefined"!=typeof globalThis?globalThis:e||self).uuidParse=n()}(this,(function(){"use strict";var e=/^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;return function(n){if(!function(n){return"string"==typeof n&&e.test(n)}(n))throw TypeError("Invalid UUID");var t,i=new Uint8Array(16);return i[0]=(t=parseInt(n.slice(0,8),16))>>>24,i[1]=t>>>16&255,i[2]=t>>>8&255,i[3]=255&t,i[4]=(t=parseInt(n.slice(9,13),16))>>>8,i[5]=255&t,i[6]=(t=parseInt(n.slice(14,18),16))>>>8,i[7]=255&t,i[8]=(t=parseInt(n.slice(19,23),16))>>>8,i[9]=255&t,i[10]=(t=parseInt(n.slice(24,36),16))/1099511627776&255,i[11]=t/4294967296&255,i[12]=t>>>24&255,i[13]=t>>>16&255,i[14]=t>>>8&255,i[15]=255&t,i}}));
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidStringify.min.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidStringify.min.js
new file mode 100644
index 0000000..fd39adc
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidStringify.min.js
@@ -0,0 +1 @@
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e="undefined"!=typeof globalThis?globalThis:e||self).uuidStringify=t()}(this,(function(){"use strict";var e=/^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;function t(t){return"string"==typeof t&&e.test(t)}for(var i=[],n=0;n<256;++n)i.push((n+256).toString(16).substr(1));return function(e){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:0,f=(i[e[n+0]]+i[e[n+1]]+i[e[n+2]]+i[e[n+3]]+"-"+i[e[n+4]]+i[e[n+5]]+"-"+i[e[n+6]]+i[e[n+7]]+"-"+i[e[n+8]]+i[e[n+9]]+"-"+i[e[n+10]]+i[e[n+11]]+i[e[n+12]]+i[e[n+13]]+i[e[n+14]]+i[e[n+15]]).toLowerCase();if(!t(f))throw TypeError("Stringified UUID is invalid");return f}}));
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidValidate.min.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidValidate.min.js
new file mode 100644
index 0000000..378e5b9
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidValidate.min.js
@@ -0,0 +1 @@
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e="undefined"!=typeof globalThis?globalThis:e||self).uuidValidate=t()}(this,(function(){"use strict";var e=/^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;return function(t){return"string"==typeof t&&e.test(t)}}));
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidVersion.min.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidVersion.min.js
new file mode 100644
index 0000000..274bb09
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidVersion.min.js
@@ -0,0 +1 @@
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e="undefined"!=typeof globalThis?globalThis:e||self).uuidVersion=t()}(this,(function(){"use strict";var e=/^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;return function(t){if(!function(t){return"string"==typeof t&&e.test(t)}(t))throw TypeError("Invalid UUID");return parseInt(t.substr(14,1),16)}}));
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv1.min.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv1.min.js
new file mode 100644
index 0000000..2622889
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv1.min.js
@@ -0,0 +1 @@
+!function(e,o){"object"==typeof exports&&"undefined"!=typeof module?module.exports=o():"function"==typeof define&&define.amd?define(o):(e="undefined"!=typeof globalThis?globalThis:e||self).uuidv1=o()}(this,(function(){"use strict";var e,o=new Uint8Array(16);function t(){if(!e&&!(e="undefined"!=typeof crypto&&crypto.getRandomValues&&crypto.getRandomValues.bind(crypto)||"undefined"!=typeof msCrypto&&"function"==typeof msCrypto.getRandomValues&&msCrypto.getRandomValues.bind(msCrypto)))throw new Error("crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported");return e(o)}var n=/^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;function r(e){return"string"==typeof e&&n.test(e)}for(var i,u,s=[],a=0;a<256;++a)s.push((a+256).toString(16).substr(1));var d=0,f=0;return function(e,o,n){var a=o&&n||0,c=o||new Array(16),l=(e=e||{}).node||i,p=void 0!==e.clockseq?e.clockseq:u;if(null==l||null==p){var v=e.random||(e.rng||t)();null==l&&(l=i=[1|v[0],v[1],v[2],v[3],v[4],v[5]]),null==p&&(p=u=16383&(v[6]<<8|v[7]))}var y=void 0!==e.msecs?e.msecs:Date.now(),m=void 0!==e.nsecs?e.nsecs:f+1,g=y-d+(m-f)/1e4;if(g<0&&void 0===e.clockseq&&(p=p+1&16383),(g<0||y>d)&&void 0===e.nsecs&&(m=0),m>=1e4)throw new Error("uuid.v1(): Can't create more than 10M uuids/sec");d=y,f=m,u=p;var h=(1e4*(268435455&(y+=122192928e5))+m)%4294967296;c[a++]=h>>>24&255,c[a++]=h>>>16&255,c[a++]=h>>>8&255,c[a++]=255&h;var w=y/4294967296*1e4&268435455;c[a++]=w>>>8&255,c[a++]=255&w,c[a++]=w>>>24&15|16,c[a++]=w>>>16&255,c[a++]=p>>>8|128,c[a++]=255&p;for(var b=0;b<6;++b)c[a+b]=l[b];return o||function(e){var o=arguments.length>1&&void 0!==arguments[1]?arguments[1]:0,t=(s[e[o+0]]+s[e[o+1]]+s[e[o+2]]+s[e[o+3]]+"-"+s[e[o+4]]+s[e[o+5]]+"-"+s[e[o+6]]+s[e[o+7]]+"-"+s[e[o+8]]+s[e[o+9]]+"-"+s[e[o+10]]+s[e[o+11]]+s[e[o+12]]+s[e[o+13]]+s[e[o+14]]+s[e[o+15]]).toLowerCase();if(!r(t))throw TypeError("Stringified UUID is invalid");return t}(c)}}));
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv3.min.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv3.min.js
new file mode 100644
index 0000000..8d37b62
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv3.min.js
@@ -0,0 +1 @@
+!function(n,r){"object"==typeof exports&&"undefined"!=typeof module?module.exports=r():"function"==typeof define&&define.amd?define(r):(n="undefined"!=typeof globalThis?globalThis:n||self).uuidv3=r()}(this,(function(){"use strict";var n=/^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;function r(r){return"string"==typeof r&&n.test(r)}for(var e=[],t=0;t<256;++t)e.push((t+256).toString(16).substr(1));function i(n){return 14+(n+64>>>9<<4)+1}function o(n,r){var e=(65535&n)+(65535&r);return(n>>16)+(r>>16)+(e>>16)<<16|65535&e}function a(n,r,e,t,i,a){return o((f=o(o(r,n),o(t,a)))<<(u=i)|f>>>32-u,e);var f,u}function f(n,r,e,t,i,o,f){return a(r&e|~r&t,n,r,i,o,f)}function u(n,r,e,t,i,o,f){return a(r&t|e&~t,n,r,i,o,f)}function c(n,r,e,t,i,o,f){return a(r^e^t,n,r,i,o,f)}function s(n,r,e,t,i,o,f){return a(e^(r|~t),n,r,i,o,f)}return function(n,t,i){function o(n,o,a,f){if("string"==typeof n&&(n=function(n){n=unescape(encodeURIComponent(n));for(var r=[],e=0;e<n.length;++e)r.push(n.charCodeAt(e));return r}(n)),"string"==typeof o&&(o=function(n){if(!r(n))throw TypeError("Invalid UUID");var e,t=new Uint8Array(16);return t[0]=(e=parseInt(n.slice(0,8),16))>>>24,t[1]=e>>>16&255,t[2]=e>>>8&255,t[3]=255&e,t[4]=(e=parseInt(n.slice(9,13),16))>>>8,t[5]=255&e,t[6]=(e=parseInt(n.slice(14,18),16))>>>8,t[7]=255&e,t[8]=(e=parseInt(n.slice(19,23),16))>>>8,t[9]=255&e,t[10]=(e=parseInt(n.slice(24,36),16))/1099511627776&255,t[11]=e/4294967296&255,t[12]=e>>>24&255,t[13]=e>>>16&255,t[14]=e>>>8&255,t[15]=255&e,t}(o)),16!==o.length)throw TypeError("Namespace must be array-like (16 iterable integer values, 0-255)");var u=new Uint8Array(16+n.length);if(u.set(o),u.set(n,o.length),(u=i(u))[6]=15&u[6]|t,u[8]=63&u[8]|128,a){f=f||0;for(var c=0;c<16;++c)a[f+c]=u[c];return a}return function(n){var t=arguments.length>1&&void 0!==arguments[1]?arguments[1]:0,i=(e[n[t+0]]+e[n[t+1]]+e[n[t+2]]+e[n[t+3]]+"-"+e[n[t+4]]+e[n[t+5]]+"-"+e[n[t+6]]+e[n[t+7]]+"-"+e[n[t+8]]+e[n[t+9]]+"-"+e[n[t+10]]+e[n[t+11]]+e[n[t+12]]+e[n[t+13]]+e[n[t+14]]+e[n[t+15]]).toLowerCase();if(!r(i))throw TypeError("Stringified UUID is invalid");return i}(u)}try{o.name=n}catch(n){}return o.DNS="6ba7b810-9dad-11d1-80b4-00c04fd430c8",o.URL="6ba7b811-9dad-11d1-80b4-00c04fd430c8",o}("v3",48,(function(n){if("string"==typeof n){var r=unescape(encodeURIComponent(n));n=new Uint8Array(r.length);for(var e=0;e<r.length;++e)n[e]=r.charCodeAt(e)}return function(n){for(var r=[],e=32*n.length,t="0123456789abcdef",i=0;i<e;i+=8){var o=n[i>>5]>>>i%32&255,a=parseInt(t.charAt(o>>>4&15)+t.charAt(15&o),16);r.push(a)}return r}(function(n,r){n[r>>5]|=128<<r%32,n[i(r)-1]=r;for(var e=1732584193,t=-271733879,a=-1732584194,l=271733878,d=0;d<n.length;d+=16){var p=e,h=t,v=a,g=l;e=f(e,t,a,l,n[d],7,-680876936),l=f(l,e,t,a,n[d+1],12,-389564586),a=f(a,l,e,t,n[d+2],17,606105819),t=f(t,a,l,e,n[d+3],22,-1044525330),e=f(e,t,a,l,n[d+4],7,-176418897),l=f(l,e,t,a,n[d+5],12,1200080426),a=f(a,l,e,t,n[d+6],17,-1473231341),t=f(t,a,l,e,n[d+7],22,-45705983),e=f(e,t,a,l,n[d+8],7,1770035416),l=f(l,e,t,a,n[d+9],12,-1958414417),a=f(a,l,e,t,n[d+10],17,-42063),t=f(t,a,l,e,n[d+11],22,-1990404162),e=f(e,t,a,l,n[d+12],7,1804603682),l=f(l,e,t,a,n[d+13],12,-40341101),a=f(a,l,e,t,n[d+14],17,-1502002290),e=u(e,t=f(t,a,l,e,n[d+15],22,1236535329),a,l,n[d+1],5,-165796510),l=u(l,e,t,a,n[d+6],9,-1069501632),a=u(a,l,e,t,n[d+11],14,643717713),t=u(t,a,l,e,n[d],20,-373897302),e=u(e,t,a,l,n[d+5],5,-701558691),l=u(l,e,t,a,n[d+10],9,38016083),a=u(a,l,e,t,n[d+15],14,-660478335),t=u(t,a,l,e,n[d+4],20,-405537848),e=u(e,t,a,l,n[d+9],5,568446438),l=u(l,e,t,a,n[d+14],9,-1019803690),a=u(a,l,e,t,n[d+3],14,-187363961),t=u(t,a,l,e,n[d+8],20,1163531501),e=u(e,t,a,l,n[d+13],5,-1444681467),l=u(l,e,t,a,n[d+2],9,-51403784),a=u(a,l,e,t,n[d+7],14,1735328473),e=c(e,t=u(t,a,l,e,n[d+12],20,-1926607734),a,l,n[d+5],4,-378558),l=c(l,e,t,a,n[d+8],11,-2022574463),a=c(a,l,e,t,n[d+11],16,1839030562),t=c(t,a,l,e,n[d+14],23,-35309556),e=c(e,t,a,l,n[d+1],4,-1530992060),l=c(l,e,t,a,n[d+4],11,1272893353),a=c(a,l,e,t,n[d+7],16,-155497632),t=c(t,a,l,e,n[d+10],23,-1094730640),e=c(e,t,a,l,n[d+13],4,681279174),l=c(l,e,t,a,n[d],11,-358537222),a=c(a,l,e,t,n[d+3],16,-722521979),t=c(t,a,l,e,n[d+6],23,76029189),e=c(e,t,a,l,n[d+9],4,-640364487),l=c(l,e,t,a,n[d+12],11,-421815835),a=c(a,l,e,t,n[d+15],16,530742520),e=s(e,t=c(t,a,l,e,n[d+2],23,-995338651),a,l,n[d],6,-198630844),l=s(l,e,t,a,n[d+7],10,1126891415),a=s(a,l,e,t,n[d+14],15,-1416354905),t=s(t,a,l,e,n[d+5],21,-57434055),e=s(e,t,a,l,n[d+12],6,1700485571),l=s(l,e,t,a,n[d+3],10,-1894986606),a=s(a,l,e,t,n[d+10],15,-1051523),t=s(t,a,l,e,n[d+1],21,-2054922799),e=s(e,t,a,l,n[d+8],6,1873313359),l=s(l,e,t,a,n[d+15],10,-30611744),a=s(a,l,e,t,n[d+6],15,-1560198380),t=s(t,a,l,e,n[d+13],21,1309151649),e=s(e,t,a,l,n[d+4],6,-145523070),l=s(l,e,t,a,n[d+11],10,-1120210379),a=s(a,l,e,t,n[d+2],15,718787259),t=s(t,a,l,e,n[d+9],21,-343485551),e=o(e,p),t=o(t,h),a=o(a,v),l=o(l,g)}return[e,t,a,l]}(function(n){if(0===n.length)return[];for(var r=8*n.length,e=new Uint32Array(i(r)),t=0;t<r;t+=8)e[t>>5]|=(255&n[t/8])<<t%32;return e}(n),8*n.length))}))}));
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv4.min.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv4.min.js
new file mode 100644
index 0000000..e9df84b
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv4.min.js
@@ -0,0 +1 @@
+!function(t,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(t="undefined"!=typeof globalThis?globalThis:t||self).uuidv4=e()}(this,(function(){"use strict";var t,e=new Uint8Array(16);function o(){if(!t&&!(t="undefined"!=typeof crypto&&crypto.getRandomValues&&crypto.getRandomValues.bind(crypto)||"undefined"!=typeof msCrypto&&"function"==typeof msCrypto.getRandomValues&&msCrypto.getRandomValues.bind(msCrypto)))throw new Error("crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported");return t(e)}var n=/^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;function r(t){return"string"==typeof t&&n.test(t)}for(var i=[],u=0;u<256;++u)i.push((u+256).toString(16).substr(1));return function(t,e,n){var u=(t=t||{}).random||(t.rng||o)();if(u[6]=15&u[6]|64,u[8]=63&u[8]|128,e){n=n||0;for(var f=0;f<16;++f)e[n+f]=u[f];return e}return function(t){var e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:0,o=(i[t[e+0]]+i[t[e+1]]+i[t[e+2]]+i[t[e+3]]+"-"+i[t[e+4]]+i[t[e+5]]+"-"+i[t[e+6]]+i[t[e+7]]+"-"+i[t[e+8]]+i[t[e+9]]+"-"+i[t[e+10]]+i[t[e+11]]+i[t[e+12]]+i[t[e+13]]+i[t[e+14]]+i[t[e+15]]).toLowerCase();if(!r(o))throw TypeError("Stringified UUID is invalid");return o}(u)}}));
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv5.min.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv5.min.js
new file mode 100644
index 0000000..ba6fc63
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/umd/uuidv5.min.js
@@ -0,0 +1 @@
+!function(r,e){"object"==typeof exports&&"undefined"!=typeof module?module.exports=e():"function"==typeof define&&define.amd?define(e):(r="undefined"!=typeof globalThis?globalThis:r||self).uuidv5=e()}(this,(function(){"use strict";var r=/^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000)$/i;function e(e){return"string"==typeof e&&r.test(e)}for(var t=[],n=0;n<256;++n)t.push((n+256).toString(16).substr(1));function a(r,e,t,n){switch(r){case 0:return e&t^~e&n;case 1:return e^t^n;case 2:return e&t^e&n^t&n;case 3:return e^t^n}}function o(r,e){return r<<e|r>>>32-e}return function(r,n,a){function o(r,o,i,f){if("string"==typeof r&&(r=function(r){r=unescape(encodeURIComponent(r));for(var e=[],t=0;t<r.length;++t)e.push(r.charCodeAt(t));return e}(r)),"string"==typeof o&&(o=function(r){if(!e(r))throw TypeError("Invalid UUID");var t,n=new Uint8Array(16);return n[0]=(t=parseInt(r.slice(0,8),16))>>>24,n[1]=t>>>16&255,n[2]=t>>>8&255,n[3]=255&t,n[4]=(t=parseInt(r.slice(9,13),16))>>>8,n[5]=255&t,n[6]=(t=parseInt(r.slice(14,18),16))>>>8,n[7]=255&t,n[8]=(t=parseInt(r.slice(19,23),16))>>>8,n[9]=255&t,n[10]=(t=parseInt(r.slice(24,36),16))/1099511627776&255,n[11]=t/4294967296&255,n[12]=t>>>24&255,n[13]=t>>>16&255,n[14]=t>>>8&255,n[15]=255&t,n}(o)),16!==o.length)throw TypeError("Namespace must be array-like (16 iterable integer values, 0-255)");var s=new Uint8Array(16+r.length);if(s.set(o),s.set(r,o.length),(s=a(s))[6]=15&s[6]|n,s[8]=63&s[8]|128,i){f=f||0;for(var u=0;u<16;++u)i[f+u]=s[u];return i}return function(r){var n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:0,a=(t[r[n+0]]+t[r[n+1]]+t[r[n+2]]+t[r[n+3]]+"-"+t[r[n+4]]+t[r[n+5]]+"-"+t[r[n+6]]+t[r[n+7]]+"-"+t[r[n+8]]+t[r[n+9]]+"-"+t[r[n+10]]+t[r[n+11]]+t[r[n+12]]+t[r[n+13]]+t[r[n+14]]+t[r[n+15]]).toLowerCase();if(!e(a))throw TypeError("Stringified UUID is invalid");return a}(s)}try{o.name=r}catch(r){}return o.DNS="6ba7b810-9dad-11d1-80b4-00c04fd430c8",o.URL="6ba7b811-9dad-11d1-80b4-00c04fd430c8",o}("v5",80,(function(r){var e=[1518500249,1859775393,2400959708,3395469782],t=[1732584193,4023233417,2562383102,271733878,3285377520];if("string"==typeof r){var n=unescape(encodeURIComponent(r));r=[];for(var i=0;i<n.length;++i)r.push(n.charCodeAt(i))}else Array.isArray(r)||(r=Array.prototype.slice.call(r));r.push(128);for(var f=r.length/4+2,s=Math.ceil(f/16),u=new Array(s),c=0;c<s;++c){for(var l=new Uint32Array(16),p=0;p<16;++p)l[p]=r[64*c+4*p]<<24|r[64*c+4*p+1]<<16|r[64*c+4*p+2]<<8|r[64*c+4*p+3];u[c]=l}u[s-1][14]=8*(r.length-1)/Math.pow(2,32),u[s-1][14]=Math.floor(u[s-1][14]),u[s-1][15]=8*(r.length-1)&4294967295;for(var d=0;d<s;++d){for(var h=new Uint32Array(80),v=0;v<16;++v)h[v]=u[d][v];for(var y=16;y<80;++y)h[y]=o(h[y-3]^h[y-8]^h[y-14]^h[y-16],1);for(var g=t[0],b=t[1],w=t[2],U=t[3],A=t[4],I=0;I<80;++I){var m=Math.floor(I/20),C=o(g,5)+a(m,b,w,U)+A+e[m]+h[I]>>>0;A=U,U=w,w=o(b,30)>>>0,b=g,g=C}t[0]=t[0]+g>>>0,t[1]=t[1]+b>>>0,t[2]=t[2]+w>>>0,t[3]=t[3]+U>>>0,t[4]=t[4]+A>>>0}return[t[0]>>24&255,t[0]>>16&255,t[0]>>8&255,255&t[0],t[1]>>24&255,t[1]>>16&255,t[1]>>8&255,255&t[1],t[2]>>24&255,t[2]>>16&255,t[2]>>8&255,255&t[2],t[3]>>24&255,t[3]>>16&255,t[3]>>8&255,255&t[3],t[4]>>24&255,t[4]>>16&255,t[4]>>8&255,255&t[4]]}))}));
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/uuid-bin.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/uuid-bin.js
new file mode 100644
index 0000000..50a7a9f
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/uuid-bin.js
@@ -0,0 +1,85 @@
+"use strict";
+
+var _assert = _interopRequireDefault(require("assert"));
+
+var _v = _interopRequireDefault(require("./v1.js"));
+
+var _v2 = _interopRequireDefault(require("./v3.js"));
+
+var _v3 = _interopRequireDefault(require("./v4.js"));
+
+var _v4 = _interopRequireDefault(require("./v5.js"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function usage() {
+  console.log('Usage:');
+  console.log('  uuid');
+  console.log('  uuid v1');
+  console.log('  uuid v3 <name> <namespace uuid>');
+  console.log('  uuid v4');
+  console.log('  uuid v5 <name> <namespace uuid>');
+  console.log('  uuid --help');
+  console.log('\nNote: <namespace uuid> may be "URL" or "DNS" to use the corresponding UUIDs defined by RFC4122');
+}
+
+const args = process.argv.slice(2);
+
+if (args.indexOf('--help') >= 0) {
+  usage();
+  process.exit(0);
+}
+
+const version = args.shift() || 'v4';
+
+switch (version) {
+  case 'v1':
+    console.log((0, _v.default)());
+    break;
+
+  case 'v3':
+    {
+      const name = args.shift();
+      let namespace = args.shift();
+      (0, _assert.default)(name != null, 'v3 name not specified');
+      (0, _assert.default)(namespace != null, 'v3 namespace not specified');
+
+      if (namespace === 'URL') {
+        namespace = _v2.default.URL;
+      }
+
+      if (namespace === 'DNS') {
+        namespace = _v2.default.DNS;
+      }
+
+      console.log((0, _v2.default)(name, namespace));
+      break;
+    }
+
+  case 'v4':
+    console.log((0, _v3.default)());
+    break;
+
+  case 'v5':
+    {
+      const name = args.shift();
+      let namespace = args.shift();
+      (0, _assert.default)(name != null, 'v5 name not specified');
+      (0, _assert.default)(namespace != null, 'v5 namespace not specified');
+
+      if (namespace === 'URL') {
+        namespace = _v4.default.URL;
+      }
+
+      if (namespace === 'DNS') {
+        namespace = _v4.default.DNS;
+      }
+
+      console.log((0, _v4.default)(name, namespace));
+      break;
+    }
+
+  default:
+    usage();
+    process.exit(1);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v1.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v1.js
new file mode 100644
index 0000000..abb9b3d
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v1.js
@@ -0,0 +1,107 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _rng = _interopRequireDefault(require("./rng.js"));
+
+var _stringify = _interopRequireDefault(require("./stringify.js"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+// **`v1()` - Generate time-based UUID**
+//
+// Inspired by https://github.com/LiosK/UUID.js
+// and http://docs.python.org/library/uuid.html
+let _nodeId;
+
+let _clockseq; // Previous uuid creation time
+
+
+let _lastMSecs = 0;
+let _lastNSecs = 0; // See https://github.com/uuidjs/uuid for API details
+
+function v1(options, buf, offset) {
+  let i = buf && offset || 0;
+  const b = buf || new Array(16);
+  options = options || {};
+  let node = options.node || _nodeId;
+  let clockseq = options.clockseq !== undefined ? options.clockseq : _clockseq; // node and clockseq need to be initialized to random values if they're not
+  // specified.  We do this lazily to minimize issues related to insufficient
+  // system entropy.  See #189
+
+  if (node == null || clockseq == null) {
+    const seedBytes = options.random || (options.rng || _rng.default)();
+
+    if (node == null) {
+      // Per 4.5, create and 48-bit node id, (47 random bits + multicast bit = 1)
+      node = _nodeId = [seedBytes[0] | 0x01, seedBytes[1], seedBytes[2], seedBytes[3], seedBytes[4], seedBytes[5]];
+    }
+
+    if (clockseq == null) {
+      // Per 4.2.2, randomize (14 bit) clockseq
+      clockseq = _clockseq = (seedBytes[6] << 8 | seedBytes[7]) & 0x3fff;
+    }
+  } // UUID timestamps are 100 nano-second units since the Gregorian epoch,
+  // (1582-10-15 00:00).  JSNumbers aren't precise enough for this, so
+  // time is handled internally as 'msecs' (integer milliseconds) and 'nsecs'
+  // (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01 00:00.
+
+
+  let msecs = options.msecs !== undefined ? options.msecs : Date.now(); // Per 4.2.1.2, use count of uuid's generated during the current clock
+  // cycle to simulate higher resolution clock
+
+  let nsecs = options.nsecs !== undefined ? options.nsecs : _lastNSecs + 1; // Time since last uuid creation (in msecs)
+
+  const dt = msecs - _lastMSecs + (nsecs - _lastNSecs) / 10000; // Per 4.2.1.2, Bump clockseq on clock regression
+
+  if (dt < 0 && options.clockseq === undefined) {
+    clockseq = clockseq + 1 & 0x3fff;
+  } // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
+  // time interval
+
+
+  if ((dt < 0 || msecs > _lastMSecs) && options.nsecs === undefined) {
+    nsecs = 0;
+  } // Per 4.2.1.2 Throw error if too many uuids are requested
+
+
+  if (nsecs >= 10000) {
+    throw new Error("uuid.v1(): Can't create more than 10M uuids/sec");
+  }
+
+  _lastMSecs = msecs;
+  _lastNSecs = nsecs;
+  _clockseq = clockseq; // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
+
+  msecs += 12219292800000; // `time_low`
+
+  const tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
+  b[i++] = tl >>> 24 & 0xff;
+  b[i++] = tl >>> 16 & 0xff;
+  b[i++] = tl >>> 8 & 0xff;
+  b[i++] = tl & 0xff; // `time_mid`
+
+  const tmh = msecs / 0x100000000 * 10000 & 0xfffffff;
+  b[i++] = tmh >>> 8 & 0xff;
+  b[i++] = tmh & 0xff; // `time_high_and_version`
+
+  b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
+
+  b[i++] = tmh >>> 16 & 0xff; // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
+
+  b[i++] = clockseq >>> 8 | 0x80; // `clock_seq_low`
+
+  b[i++] = clockseq & 0xff; // `node`
+
+  for (let n = 0; n < 6; ++n) {
+    b[i + n] = node[n];
+  }
+
+  return buf || (0, _stringify.default)(b);
+}
+
+var _default = v1;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v3.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v3.js
new file mode 100644
index 0000000..6b47ff5
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v3.js
@@ -0,0 +1,16 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _v = _interopRequireDefault(require("./v35.js"));
+
+var _md = _interopRequireDefault(require("./md5.js"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+const v3 = (0, _v.default)('v3', 0x30, _md.default);
+var _default = v3;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v35.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v35.js
new file mode 100644
index 0000000..f784c63
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v35.js
@@ -0,0 +1,78 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = _default;
+exports.URL = exports.DNS = void 0;
+
+var _stringify = _interopRequireDefault(require("./stringify.js"));
+
+var _parse = _interopRequireDefault(require("./parse.js"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function stringToBytes(str) {
+  str = unescape(encodeURIComponent(str)); // UTF8 escape
+
+  const bytes = [];
+
+  for (let i = 0; i < str.length; ++i) {
+    bytes.push(str.charCodeAt(i));
+  }
+
+  return bytes;
+}
+
+const DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
+exports.DNS = DNS;
+const URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';
+exports.URL = URL;
+
+function _default(name, version, hashfunc) {
+  function generateUUID(value, namespace, buf, offset) {
+    if (typeof value === 'string') {
+      value = stringToBytes(value);
+    }
+
+    if (typeof namespace === 'string') {
+      namespace = (0, _parse.default)(namespace);
+    }
+
+    if (namespace.length !== 16) {
+      throw TypeError('Namespace must be array-like (16 iterable integer values, 0-255)');
+    } // Compute hash of namespace and value, Per 4.3
+    // Future: Use spread syntax when supported on all platforms, e.g. `bytes =
+    // hashfunc([...namespace, ... value])`
+
+
+    let bytes = new Uint8Array(16 + value.length);
+    bytes.set(namespace);
+    bytes.set(value, namespace.length);
+    bytes = hashfunc(bytes);
+    bytes[6] = bytes[6] & 0x0f | version;
+    bytes[8] = bytes[8] & 0x3f | 0x80;
+
+    if (buf) {
+      offset = offset || 0;
+
+      for (let i = 0; i < 16; ++i) {
+        buf[offset + i] = bytes[i];
+      }
+
+      return buf;
+    }
+
+    return (0, _stringify.default)(bytes);
+  } // Function#name is not settable on some platforms (#270)
+
+
+  try {
+    generateUUID.name = name; // eslint-disable-next-line no-empty
+  } catch (err) {} // For CommonJS default export support
+
+
+  generateUUID.DNS = DNS;
+  generateUUID.URL = URL;
+  return generateUUID;
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v4.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v4.js
new file mode 100644
index 0000000..838ce0b
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v4.js
@@ -0,0 +1,37 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _rng = _interopRequireDefault(require("./rng.js"));
+
+var _stringify = _interopRequireDefault(require("./stringify.js"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function v4(options, buf, offset) {
+  options = options || {};
+
+  const rnds = options.random || (options.rng || _rng.default)(); // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
+
+
+  rnds[6] = rnds[6] & 0x0f | 0x40;
+  rnds[8] = rnds[8] & 0x3f | 0x80; // Copy bytes to buffer, if provided
+
+  if (buf) {
+    offset = offset || 0;
+
+    for (let i = 0; i < 16; ++i) {
+      buf[offset + i] = rnds[i];
+    }
+
+    return buf;
+  }
+
+  return (0, _stringify.default)(rnds);
+}
+
+var _default = v4;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v5.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v5.js
new file mode 100644
index 0000000..99d615e
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/v5.js
@@ -0,0 +1,16 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _v = _interopRequireDefault(require("./v35.js"));
+
+var _sha = _interopRequireDefault(require("./sha1.js"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+const v5 = (0, _v.default)('v5', 0x50, _sha.default);
+var _default = v5;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/validate.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/validate.js
new file mode 100644
index 0000000..fd05215
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/validate.js
@@ -0,0 +1,17 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _regex = _interopRequireDefault(require("./regex.js"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function validate(uuid) {
+  return typeof uuid === 'string' && _regex.default.test(uuid);
+}
+
+var _default = validate;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/version.js b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/version.js
new file mode 100644
index 0000000..b72949c
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/dist/version.js
@@ -0,0 +1,21 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+
+var _validate = _interopRequireDefault(require("./validate.js"));
+
+function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
+
+function version(uuid) {
+  if (!(0, _validate.default)(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+
+  return parseInt(uuid.substr(14, 1), 16);
+}
+
+var _default = version;
+exports.default = _default;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/package.json b/mqtt-backend/node_modules/hyperid/node_modules/uuid/package.json
new file mode 100644
index 0000000..f0ab371
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/package.json
@@ -0,0 +1,135 @@
+{
+  "name": "uuid",
+  "version": "8.3.2",
+  "description": "RFC4122 (v1, v4, and v5) UUIDs",
+  "commitlint": {
+    "extends": [
+      "@commitlint/config-conventional"
+    ]
+  },
+  "keywords": [
+    "uuid",
+    "guid",
+    "rfc4122"
+  ],
+  "license": "MIT",
+  "bin": {
+    "uuid": "./dist/bin/uuid"
+  },
+  "sideEffects": false,
+  "main": "./dist/index.js",
+  "exports": {
+    ".": {
+      "node": {
+        "module": "./dist/esm-node/index.js",
+        "require": "./dist/index.js",
+        "import": "./wrapper.mjs"
+      },
+      "default": "./dist/esm-browser/index.js"
+    },
+    "./package.json": "./package.json"
+  },
+  "module": "./dist/esm-node/index.js",
+  "browser": {
+    "./dist/md5.js": "./dist/md5-browser.js",
+    "./dist/rng.js": "./dist/rng-browser.js",
+    "./dist/sha1.js": "./dist/sha1-browser.js",
+    "./dist/esm-node/index.js": "./dist/esm-browser/index.js"
+  },
+  "files": [
+    "CHANGELOG.md",
+    "CONTRIBUTING.md",
+    "LICENSE.md",
+    "README.md",
+    "dist",
+    "wrapper.mjs"
+  ],
+  "devDependencies": {
+    "@babel/cli": "7.11.6",
+    "@babel/core": "7.11.6",
+    "@babel/preset-env": "7.11.5",
+    "@commitlint/cli": "11.0.0",
+    "@commitlint/config-conventional": "11.0.0",
+    "@rollup/plugin-node-resolve": "9.0.0",
+    "babel-eslint": "10.1.0",
+    "bundlewatch": "0.3.1",
+    "eslint": "7.10.0",
+    "eslint-config-prettier": "6.12.0",
+    "eslint-config-standard": "14.1.1",
+    "eslint-plugin-import": "2.22.1",
+    "eslint-plugin-node": "11.1.0",
+    "eslint-plugin-prettier": "3.1.4",
+    "eslint-plugin-promise": "4.2.1",
+    "eslint-plugin-standard": "4.0.1",
+    "husky": "4.3.0",
+    "jest": "25.5.4",
+    "lint-staged": "10.4.0",
+    "npm-run-all": "4.1.5",
+    "optional-dev-dependency": "2.0.1",
+    "prettier": "2.1.2",
+    "random-seed": "0.3.0",
+    "rollup": "2.28.2",
+    "rollup-plugin-terser": "7.0.2",
+    "runmd": "1.3.2",
+    "standard-version": "9.0.0"
+  },
+  "optionalDevDependencies": {
+    "@wdio/browserstack-service": "6.4.0",
+    "@wdio/cli": "6.4.0",
+    "@wdio/jasmine-framework": "6.4.0",
+    "@wdio/local-runner": "6.4.0",
+    "@wdio/spec-reporter": "6.4.0",
+    "@wdio/static-server-service": "6.4.0",
+    "@wdio/sync": "6.4.0"
+  },
+  "scripts": {
+    "examples:browser:webpack:build": "cd examples/browser-webpack && npm install && npm run build",
+    "examples:browser:rollup:build": "cd examples/browser-rollup && npm install && npm run build",
+    "examples:node:commonjs:test": "cd examples/node-commonjs && npm install && npm test",
+    "examples:node:esmodules:test": "cd examples/node-esmodules && npm install && npm test",
+    "lint": "npm run eslint:check && npm run prettier:check",
+    "eslint:check": "eslint src/ test/ examples/ *.js",
+    "eslint:fix": "eslint --fix src/ test/ examples/ *.js",
+    "pretest": "[ -n $CI ] || npm run build",
+    "test": "BABEL_ENV=commonjs node --throw-deprecation node_modules/.bin/jest test/unit/",
+    "pretest:browser": "optional-dev-dependency && npm run build && npm-run-all --parallel examples:browser:**",
+    "test:browser": "wdio run ./wdio.conf.js",
+    "pretest:node": "npm run build",
+    "test:node": "npm-run-all --parallel examples:node:**",
+    "test:pack": "./scripts/testpack.sh",
+    "pretest:benchmark": "npm run build",
+    "test:benchmark": "cd examples/benchmark && npm install && npm test",
+    "prettier:check": "prettier --ignore-path .prettierignore --check '**/*.{js,jsx,json,md}'",
+    "prettier:fix": "prettier --ignore-path .prettierignore --write '**/*.{js,jsx,json,md}'",
+    "bundlewatch": "npm run pretest:browser && bundlewatch --config bundlewatch.config.json",
+    "md": "runmd --watch --output=README.md README_js.md",
+    "docs": "( node --version | grep -q 'v12' ) && ( npm run build && runmd --output=README.md README_js.md )",
+    "docs:diff": "npm run docs && git diff --quiet README.md",
+    "build": "./scripts/build.sh",
+    "prepack": "npm run build",
+    "release": "standard-version --no-verify"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/uuidjs/uuid.git"
+  },
+  "husky": {
+    "hooks": {
+      "commit-msg": "commitlint -E HUSKY_GIT_PARAMS",
+      "pre-commit": "lint-staged"
+    }
+  },
+  "lint-staged": {
+    "*.{js,jsx,json,md}": [
+      "prettier --write"
+    ],
+    "*.{js,jsx}": [
+      "eslint --fix"
+    ]
+  },
+  "standard-version": {
+    "scripts": {
+      "postchangelog": "prettier --write CHANGELOG.md"
+    }
+  }
+}
diff --git a/mqtt-backend/node_modules/hyperid/node_modules/uuid/wrapper.mjs b/mqtt-backend/node_modules/hyperid/node_modules/uuid/wrapper.mjs
new file mode 100644
index 0000000..c31e9ce
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/node_modules/uuid/wrapper.mjs
@@ -0,0 +1,10 @@
+import uuid from './dist/index.js';
+export const v1 = uuid.v1;
+export const v3 = uuid.v3;
+export const v4 = uuid.v4;
+export const v5 = uuid.v5;
+export const NIL = uuid.NIL;
+export const version = uuid.version;
+export const validate = uuid.validate;
+export const stringify = uuid.stringify;
+export const parse = uuid.parse;
diff --git a/mqtt-backend/node_modules/hyperid/package.json b/mqtt-backend/node_modules/hyperid/package.json
new file mode 100644
index 0000000..4e0866f
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/package.json
@@ -0,0 +1,56 @@
+{
+  "name": "hyperid",
+  "version": "3.3.0",
+  "description": "Uber-fast unique id generation, for Node.js and the browser",
+  "main": "hyperid",
+  "files": [
+    "hyperid.js",
+    "index.d.ts",
+    "uuid-node.js",
+    "uuid-browser.js",
+    "test"
+  ],
+  "scripts": {
+    "typescript": "tsc --project ./test/tsconfig.json",
+    "test": "standard && tape test/test.js test/uniqueness.js test/buffer.js | tap-dot && npm run typescript",
+    "legacy": "tape test/test.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/mcollina/hyperid.git"
+  },
+  "keywords": [
+    "id",
+    "generation",
+    "fast"
+  ],
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mcollina/hyperid/issues"
+  },
+  "homepage": "https://github.com/mcollina/hyperid#readme",
+  "devDependencies": {
+    "@napi-rs/uuid": "^0.2.0",
+    "benchmark": "^2.1.4",
+    "bloomfilter": "^0.0.18",
+    "hashids": "^2.2.8",
+    "nanoid": "^3.0.0",
+    "nid": "^2.0.1",
+    "pre-commit": "^1.2.2",
+    "proxyquire": "^2.1.3",
+    "shortid": "^2.2.16",
+    "standard": "^17.1.0",
+    "tap-dot": "^2.0.0",
+    "tape": "^5.0.0",
+    "typescript": "^5.4.5"
+  },
+  "dependencies": {
+    "buffer": "^5.2.1",
+    "uuid": "^8.3.2",
+    "uuid-parse": "^1.1.0"
+  },
+  "browser": {
+    "./uuid-node.js": "./uuid-browser.js"
+  }
+}
diff --git a/mqtt-backend/node_modules/hyperid/test/buffer.js b/mqtt-backend/node_modules/hyperid/test/buffer.js
new file mode 100644
index 0000000..b02b0b1
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/test/buffer.js
@@ -0,0 +1,16 @@
+const hyperid = require('..')
+const test = require('tape')
+const proxyquire = require('proxyquire')
+
+test('require buffer', function (t) {
+  t.plan(2)
+
+  const instance = hyperid()
+  const id = instance()
+  t.ok(id)
+
+  proxyquire('../hyperid', { buffer: { Buffer: null } })
+  const instance2 = hyperid()
+  const id2 = instance2()
+  t.ok(id2)
+})
diff --git a/mqtt-backend/node_modules/hyperid/test/example.ts b/mqtt-backend/node_modules/hyperid/test/example.ts
new file mode 100644
index 0000000..16eac95
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/test/example.ts
@@ -0,0 +1,17 @@
+import * as hyperid from '..'
+
+const urlSafeInstance = hyperid({ fixedLength: false, urlSafe: true })
+const fixedLengthInstance = hyperid(true)
+const startFromInstance = hyperid({ startFrom: 9 })
+const maxIntInstance = hyperid({ maxInt: 10000 })
+
+const urlSafeId = urlSafeInstance()
+const fixedLengthId = fixedLengthInstance()
+const startFromId = startFromInstance()
+const maxIntId = maxIntInstance()
+
+// decode
+console.log(hyperid.decode(urlSafeId))
+console.log(fixedLengthInstance.decode(fixedLengthId))
+console.log(startFromInstance.decode(startFromId))
+console.log(maxIntInstance.decode(maxIntId))
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/test/test.js b/mqtt-backend/node_modules/hyperid/test/test.js
new file mode 100644
index 0000000..6857c7a
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/test/test.js
@@ -0,0 +1,194 @@
+'use strict'
+
+const hyperid = require('..')
+const test = require('tape')
+
+test('generating unique ids', function (t) {
+  t.plan(1)
+
+  const instance = hyperid()
+  const ids = []
+
+  for (let i = 0; i < 2048; i++) {
+    const id = instance()
+
+    if (ids.indexOf(id) >= 0) {
+      t.fail('duplicate')
+      return
+    }
+
+    ids.push(id)
+  }
+
+  t.pass(ids.length + ' id generated')
+})
+
+test('generating unique ids are correct length when fixedLength set to true', function (t) {
+  t.plan(1)
+
+  const instance = hyperid(true)
+
+  for (let i = 0; i < 1000000; i++) {
+    const id = instance()
+
+    if (id.length !== 33) {
+      t.fail('incorrect length')
+      return
+    }
+  }
+
+  t.pass('1000000 id of 33 characters generated')
+})
+
+test('generating unique ids are correct length when fixedLength set to true (as option object)', function (t) {
+  t.plan(1)
+
+  const instance = hyperid({ fixedLength: true })
+
+  for (let i = 0; i < 1000000; i++) {
+    const id = instance()
+
+    if (id.length !== 33) {
+      t.fail('incorrect length')
+      return
+    }
+  }
+
+  t.pass('1000000 id of 33 characters generated')
+})
+
+test('decode uuids', function (t) {
+  t.plan(4)
+
+  const instance = hyperid()
+
+  t.ok(instance.uuid, 'uuid exists')
+  t.notEqual(instance.uuid, hyperid().uuid, 'uuid are not equals')
+
+  t.deepEqual(hyperid.decode(instance()), {
+    uuid: instance.uuid,
+    count: 0
+  }, 'decode')
+
+  t.deepEqual(instance.decode(instance()), {
+    uuid: instance.uuid,
+    count: 1
+  }, 'decode from an instance')
+})
+
+test('generate url safe ids', function (t) {
+  t.plan(1)
+
+  const instance = hyperid({ urlSafe: true })
+  const id = instance()
+
+  t.equal(encodeURIComponent(id), id)
+})
+
+test('decode url safe ids', function (t) {
+  t.plan(1)
+
+  const instance = hyperid({ urlSafe: true })
+
+  t.deepEqual(hyperid.decode(instance(), { urlSafe: true }), {
+    uuid: instance.uuid,
+    count: 0
+  }, 'decode')
+})
+
+test('injecting opts.startFrom', function (t) {
+  t.plan(1)
+
+  const instance = hyperid({ startFrom: 999999999 })
+  const id = instance()
+
+  id.endsWith('999999999')
+    ? t.pass('generated as expected')
+    : t.fail('did not use injected id')
+})
+
+test('opts.fixedLength - passed 999999999 - pads correctly', function (t) {
+  t.plan(1)
+
+  const instance = hyperid({ startFrom: 999999999 })
+  instance()
+  const id = instance()
+
+  id.endsWith('1000000000')
+    ? t.pass('generated as expected')
+    : t.fail('did not use injected id')
+})
+
+test('opts.fixedLength - passed invalid value - throws a friendly error', function (t) {
+  t.plan(1)
+
+  try {
+    hyperid({ startFrom: 'not a number' })
+    t.fail('did not throw an expected error')
+  } catch (e) {
+    e.message.match(/startFrom must be a number/)
+      ? t.pass('thrown as expected')
+      : t.fail('this is not the error you\'re looking for')
+  }
+})
+
+test('opts.maxInt - pass valid value', function (t) {
+  t.plan(1)
+
+  const instance = hyperid({
+    maxInt: 1
+  })
+
+  let firstId = instance()
+  let secondId = instance()
+
+  // trimming the uuid and comparing for inequality as maxInt is 1.
+  firstId = firstId.substring(0, firstId.length - 1)
+  secondId = secondId.substring(0, secondId.length - 1)
+
+  t.doesNotEqual(firstId, secondId)
+})
+
+test('opts.maxInt - pass Invalid Value, throws friendly error', function (t) {
+  t.plan(1)
+
+  try {
+    hyperid({ maxInt: 'not a number' })
+    t.fail('did not throw an expected error')
+  } catch (e) {
+    e.message.match(/maxInt must be a number. recieved/)
+      ? t.pass('thrown as expected')
+      : t.fail('this is not the error you\'re looking for')
+  }
+})
+
+test('opts.maxInt - pass valid value with startsFrom EDGE CASE', function (t) {
+  t.plan(1)
+
+  const instance = hyperid({
+    startFrom: 99999,
+    maxInt: 100000
+  })
+
+  let firstId = instance()
+  let secondId = instance()
+
+  // trimming the uuid and comparing for inequality as maxInt is 1.
+  firstId = firstId.substring(0, firstId.length - 1)
+  secondId = secondId.substring(0, secondId.length - 1)
+
+  t.doesNotEqual(firstId, secondId)
+})
+
+test.only('opts.maxInt - pass valid value, both startFrom and maxInt are equal, throws friendly error EDGE CASE', function (t) {
+  t.plan(1)
+
+  try {
+    hyperid({ startFrom: 100000, maxInt: 100000 })
+    t.fail('did not throw an expected error')
+  } catch (e) {
+    e.message.match(/startFrom must be a number between 0 and 100000/)
+      ? t.pass('thrown as expected')
+      : t.fail('this is not the error you\'re looking for')
+  }
+})
diff --git a/mqtt-backend/node_modules/hyperid/test/tsconfig.json b/mqtt-backend/node_modules/hyperid/test/tsconfig.json
new file mode 100644
index 0000000..66f6bd4
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/test/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "target": "es6",
+    "module": "commonjs",
+    "noEmit": true,
+    "strict": true,
+  },
+  "files": [
+    "./example.ts"
+  ]
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/hyperid/test/uniqueness.js b/mqtt-backend/node_modules/hyperid/test/uniqueness.js
new file mode 100644
index 0000000..d30328e
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/test/uniqueness.js
@@ -0,0 +1,68 @@
+'use strict'
+
+const hyperid = require('..')
+const test = require('tape')
+const BloomFilter = require('bloomfilter').BloomFilter
+const maxInt = Math.pow(2, 31) - 1
+
+test('uniqueness', function (t) {
+  t.plan(3)
+
+  const instance = hyperid()
+  const bloom = new BloomFilter(
+    32 * 4096 * 4096, // number of bits to allocate.
+    16 // number of hash functions.
+  )
+
+  let conflicts = 0
+  let ids = 0
+
+  const max = maxInt * 2
+
+  for (let i = 0; i < max; i += Math.ceil(Math.random() * 4096)) {
+    const id = instance()
+
+    if (bloom.test(id)) {
+      conflicts++
+    }
+
+    ids++
+
+    bloom.add(id)
+  }
+
+  t.pass(ids + ' id generated')
+  t.pass(conflicts + ' bloom filter conflicts')
+  t.ok(conflicts / ids < 0.001, '0,1% conflict ratio using bloom filters')
+})
+
+test('url safe uniqueness', function (t) {
+  t.plan(3)
+
+  const instance = hyperid({ urlSafe: true })
+  const bloom = new BloomFilter(
+    32 * 4096 * 4096, // number of bits to allocate.
+    16 // number of hash functions.
+  )
+
+  let conflicts = 0
+  let ids = 0
+
+  const max = maxInt * 2
+
+  for (let i = 0; i < max; i += Math.ceil(Math.random() * 4096)) {
+    const id = instance()
+
+    if (bloom.test(id)) {
+      conflicts++
+    }
+
+    ids++
+
+    bloom.add(id)
+  }
+
+  t.pass(ids + ' id generated')
+  t.pass(conflicts + ' bloom filter conflicts')
+  t.ok(conflicts / ids < 0.001, '0,1% conflict ratio using bloom filters')
+})
diff --git a/mqtt-backend/node_modules/hyperid/uuid-browser.js b/mqtt-backend/node_modules/hyperid/uuid-browser.js
new file mode 100644
index 0000000..c7b8af5
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/uuid-browser.js
@@ -0,0 +1,5 @@
+'use strict'
+
+// TODO use WebCrypto uuid() if it is available
+const { v4: uuidv4 } = require('uuid')
+module.exports = uuidv4
diff --git a/mqtt-backend/node_modules/hyperid/uuid-node.js b/mqtt-backend/node_modules/hyperid/uuid-node.js
new file mode 100644
index 0000000..8d251ca
--- /dev/null
+++ b/mqtt-backend/node_modules/hyperid/uuid-node.js
@@ -0,0 +1,7 @@
+'use strict'
+
+const uuid = require('uuid')
+const crypto = require('crypto')
+module.exports = typeof crypto.randomUUID === 'function'
+  ? crypto.randomUUID
+  : uuid.v4
diff --git a/mqtt-backend/node_modules/ieee754/LICENSE b/mqtt-backend/node_modules/ieee754/LICENSE
new file mode 100644
index 0000000..5aac82c
--- /dev/null
+++ b/mqtt-backend/node_modules/ieee754/LICENSE
@@ -0,0 +1,11 @@
+Copyright 2008 Fair Oaks Labs, Inc.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/mqtt-backend/node_modules/ieee754/README.md b/mqtt-backend/node_modules/ieee754/README.md
new file mode 100644
index 0000000..cb7527b
--- /dev/null
+++ b/mqtt-backend/node_modules/ieee754/README.md
@@ -0,0 +1,51 @@
+# ieee754 [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url] [![javascript style guide][standard-image]][standard-url]
+
+[travis-image]: https://img.shields.io/travis/feross/ieee754/master.svg
+[travis-url]: https://travis-ci.org/feross/ieee754
+[npm-image]: https://img.shields.io/npm/v/ieee754.svg
+[npm-url]: https://npmjs.org/package/ieee754
+[downloads-image]: https://img.shields.io/npm/dm/ieee754.svg
+[downloads-url]: https://npmjs.org/package/ieee754
+[standard-image]: https://img.shields.io/badge/code_style-standard-brightgreen.svg
+[standard-url]: https://standardjs.com
+
+[![saucelabs][saucelabs-image]][saucelabs-url]
+
+[saucelabs-image]: https://saucelabs.com/browser-matrix/ieee754.svg
+[saucelabs-url]: https://saucelabs.com/u/ieee754
+
+### Read/write IEEE754 floating point numbers from/to a Buffer or array-like object.
+
+## install
+
+```
+npm install ieee754
+```
+
+## methods
+
+`var ieee754 = require('ieee754')`
+
+The `ieee754` object has the following functions:
+
+```
+ieee754.read = function (buffer, offset, isLE, mLen, nBytes)
+ieee754.write = function (buffer, value, offset, isLE, mLen, nBytes)
+```
+
+The arguments mean the following:
+
+- buffer = the buffer
+- offset = offset into the buffer
+- value = value to set (only for `write`)
+- isLe = is little endian?
+- mLen = mantissa length
+- nBytes = number of bytes
+
+## what is ieee754?
+
+The IEEE Standard for Floating-Point Arithmetic (IEEE 754) is a technical standard for floating-point computation. [Read more](http://en.wikipedia.org/wiki/IEEE_floating_point).
+
+## license
+
+BSD 3 Clause. Copyright (c) 2008, Fair Oaks Labs, Inc.
diff --git a/mqtt-backend/node_modules/ieee754/index.d.ts b/mqtt-backend/node_modules/ieee754/index.d.ts
new file mode 100644
index 0000000..f1e4354
--- /dev/null
+++ b/mqtt-backend/node_modules/ieee754/index.d.ts
@@ -0,0 +1,10 @@
+declare namespace ieee754 {
+    export function read(
+        buffer: Uint8Array, offset: number, isLE: boolean, mLen: number,
+        nBytes: number): number;
+    export function write(
+        buffer: Uint8Array, value: number, offset: number, isLE: boolean,
+        mLen: number, nBytes: number): void;
+  }
+  
+  export = ieee754;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ieee754/index.js b/mqtt-backend/node_modules/ieee754/index.js
new file mode 100644
index 0000000..81d26c3
--- /dev/null
+++ b/mqtt-backend/node_modules/ieee754/index.js
@@ -0,0 +1,85 @@
+/*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
+exports.read = function (buffer, offset, isLE, mLen, nBytes) {
+  var e, m
+  var eLen = (nBytes * 8) - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var nBits = -7
+  var i = isLE ? (nBytes - 1) : 0
+  var d = isLE ? -1 : 1
+  var s = buffer[offset + i]
+
+  i += d
+
+  e = s & ((1 << (-nBits)) - 1)
+  s >>= (-nBits)
+  nBits += eLen
+  for (; nBits > 0; e = (e * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+
+  m = e & ((1 << (-nBits)) - 1)
+  e >>= (-nBits)
+  nBits += mLen
+  for (; nBits > 0; m = (m * 256) + buffer[offset + i], i += d, nBits -= 8) {}
+
+  if (e === 0) {
+    e = 1 - eBias
+  } else if (e === eMax) {
+    return m ? NaN : ((s ? -1 : 1) * Infinity)
+  } else {
+    m = m + Math.pow(2, mLen)
+    e = e - eBias
+  }
+  return (s ? -1 : 1) * m * Math.pow(2, e - mLen)
+}
+
+exports.write = function (buffer, value, offset, isLE, mLen, nBytes) {
+  var e, m, c
+  var eLen = (nBytes * 8) - mLen - 1
+  var eMax = (1 << eLen) - 1
+  var eBias = eMax >> 1
+  var rt = (mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0)
+  var i = isLE ? 0 : (nBytes - 1)
+  var d = isLE ? 1 : -1
+  var s = value < 0 || (value === 0 && 1 / value < 0) ? 1 : 0
+
+  value = Math.abs(value)
+
+  if (isNaN(value) || value === Infinity) {
+    m = isNaN(value) ? 1 : 0
+    e = eMax
+  } else {
+    e = Math.floor(Math.log(value) / Math.LN2)
+    if (value * (c = Math.pow(2, -e)) < 1) {
+      e--
+      c *= 2
+    }
+    if (e + eBias >= 1) {
+      value += rt / c
+    } else {
+      value += rt * Math.pow(2, 1 - eBias)
+    }
+    if (value * c >= 2) {
+      e++
+      c /= 2
+    }
+
+    if (e + eBias >= eMax) {
+      m = 0
+      e = eMax
+    } else if (e + eBias >= 1) {
+      m = ((value * c) - 1) * Math.pow(2, mLen)
+      e = e + eBias
+    } else {
+      m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen)
+      e = 0
+    }
+  }
+
+  for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
+
+  e = (e << mLen) | m
+  eLen += mLen
+  for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+
+  buffer[offset + i - d] |= s * 128
+}
diff --git a/mqtt-backend/node_modules/ieee754/package.json b/mqtt-backend/node_modules/ieee754/package.json
new file mode 100644
index 0000000..7b23851
--- /dev/null
+++ b/mqtt-backend/node_modules/ieee754/package.json
@@ -0,0 +1,52 @@
+{
+  "name": "ieee754",
+  "description": "Read/write IEEE754 floating point numbers from/to a Buffer or array-like object",
+  "version": "1.2.1",
+  "author": {
+    "name": "Feross Aboukhadijeh",
+    "email": "feross@feross.org",
+    "url": "https://feross.org"
+  },
+  "contributors": [
+    "Romain Beauxis <toots@rastageeks.org>"
+  ],
+  "devDependencies": {
+    "airtap": "^3.0.0",
+    "standard": "*",
+    "tape": "^5.0.1"
+  },
+  "keywords": [
+    "IEEE 754",
+    "buffer",
+    "convert",
+    "floating point",
+    "ieee754"
+  ],
+  "license": "BSD-3-Clause",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/feross/ieee754.git"
+  },
+  "scripts": {
+    "test": "standard && npm run test-node && npm run test-browser",
+    "test-browser": "airtap -- test/*.js",
+    "test-browser-local": "airtap --local -- test/*.js",
+    "test-node": "tape test/*.js"
+  },
+  "funding": [
+    {
+      "type": "github",
+      "url": "https://github.com/sponsors/feross"
+    },
+    {
+      "type": "patreon",
+      "url": "https://www.patreon.com/feross"
+    },
+    {
+      "type": "consulting",
+      "url": "https://feross.org/support"
+    }
+  ]
+}
diff --git a/mqtt-backend/node_modules/inherits/LICENSE b/mqtt-backend/node_modules/inherits/LICENSE
new file mode 100644
index 0000000..dea3013
--- /dev/null
+++ b/mqtt-backend/node_modules/inherits/LICENSE
@@ -0,0 +1,16 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+
diff --git a/mqtt-backend/node_modules/inherits/README.md b/mqtt-backend/node_modules/inherits/README.md
new file mode 100644
index 0000000..b1c5665
--- /dev/null
+++ b/mqtt-backend/node_modules/inherits/README.md
@@ -0,0 +1,42 @@
+Browser-friendly inheritance fully compatible with standard node.js
+[inherits](http://nodejs.org/api/util.html#util_util_inherits_constructor_superconstructor).
+
+This package exports standard `inherits` from node.js `util` module in
+node environment, but also provides alternative browser-friendly
+implementation through [browser
+field](https://gist.github.com/shtylman/4339901). Alternative
+implementation is a literal copy of standard one located in standalone
+module to avoid requiring of `util`. It also has a shim for old
+browsers with no `Object.create` support.
+
+While keeping you sure you are using standard `inherits`
+implementation in node.js environment, it allows bundlers such as
+[browserify](https://github.com/substack/node-browserify) to not
+include full `util` package to your client code if all you need is
+just `inherits` function. It worth, because browser shim for `util`
+package is large and `inherits` is often the single function you need
+from it.
+
+It's recommended to use this package instead of
+`require('util').inherits` for any code that has chances to be used
+not only in node.js but in browser too.
+
+## usage
+
+```js
+var inherits = require('inherits');
+// then use exactly as the standard one
+```
+
+## note on version ~1.0
+
+Version ~1.0 had completely different motivation and is not compatible
+neither with 2.0 nor with standard node.js `inherits`.
+
+If you are using version ~1.0 and planning to switch to ~2.0, be
+careful:
+
+* new version uses `super_` instead of `super` for referencing
+  superclass
+* new version overwrites current prototype while old one preserves any
+  existing fields on it
diff --git a/mqtt-backend/node_modules/inherits/inherits.js b/mqtt-backend/node_modules/inherits/inherits.js
new file mode 100644
index 0000000..f71f2d9
--- /dev/null
+++ b/mqtt-backend/node_modules/inherits/inherits.js
@@ -0,0 +1,9 @@
+try {
+  var util = require('util');
+  /* istanbul ignore next */
+  if (typeof util.inherits !== 'function') throw '';
+  module.exports = util.inherits;
+} catch (e) {
+  /* istanbul ignore next */
+  module.exports = require('./inherits_browser.js');
+}
diff --git a/mqtt-backend/node_modules/inherits/inherits_browser.js b/mqtt-backend/node_modules/inherits/inherits_browser.js
new file mode 100644
index 0000000..86bbb3d
--- /dev/null
+++ b/mqtt-backend/node_modules/inherits/inherits_browser.js
@@ -0,0 +1,27 @@
+if (typeof Object.create === 'function') {
+  // implementation from standard node.js 'util' module
+  module.exports = function inherits(ctor, superCtor) {
+    if (superCtor) {
+      ctor.super_ = superCtor
+      ctor.prototype = Object.create(superCtor.prototype, {
+        constructor: {
+          value: ctor,
+          enumerable: false,
+          writable: true,
+          configurable: true
+        }
+      })
+    }
+  };
+} else {
+  // old school shim for old browsers
+  module.exports = function inherits(ctor, superCtor) {
+    if (superCtor) {
+      ctor.super_ = superCtor
+      var TempCtor = function () {}
+      TempCtor.prototype = superCtor.prototype
+      ctor.prototype = new TempCtor()
+      ctor.prototype.constructor = ctor
+    }
+  }
+}
diff --git a/mqtt-backend/node_modules/inherits/package.json b/mqtt-backend/node_modules/inherits/package.json
new file mode 100644
index 0000000..37b4366
--- /dev/null
+++ b/mqtt-backend/node_modules/inherits/package.json
@@ -0,0 +1,29 @@
+{
+  "name": "inherits",
+  "description": "Browser-friendly inheritance fully compatible with standard node.js inherits()",
+  "version": "2.0.4",
+  "keywords": [
+    "inheritance",
+    "class",
+    "klass",
+    "oop",
+    "object-oriented",
+    "inherits",
+    "browser",
+    "browserify"
+  ],
+  "main": "./inherits.js",
+  "browser": "./inherits_browser.js",
+  "repository": "git://github.com/isaacs/inherits",
+  "license": "ISC",
+  "scripts": {
+    "test": "tap"
+  },
+  "devDependencies": {
+    "tap": "^14.2.4"
+  },
+  "files": [
+    "inherits.js",
+    "inherits_browser.js"
+  ]
+}
diff --git a/mqtt-backend/node_modules/ip-address/LICENSE b/mqtt-backend/node_modules/ip-address/LICENSE
new file mode 100644
index 0000000..ec79adb
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/LICENSE
@@ -0,0 +1,19 @@
+Copyright (C) 2011 by Beau Gunderson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/ip-address/README.md b/mqtt-backend/node_modules/ip-address/README.md
new file mode 100644
index 0000000..93ccb41
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/README.md
@@ -0,0 +1,105 @@
+[![CircleCI](https://dl.circleci.com/status-badge/img/circleci/9fJmTZfn8d8p7GtVt688PY/JjriGjhcxBD6zYKygMZaet/tree/master.svg?style=svg&circle-token=7baede7efd3db5f1f25fb439e97d5f695ff76318)](https://dl.circleci.com/status-badge/redirect/circleci/9fJmTZfn8d8p7GtVt688PY/JjriGjhcxBD6zYKygMZaet/tree/master)
+[![codecov]](https://codecov.io/github/beaugunderson/ip-address?branch=master)
+[![downloads]](https://www.npmjs.com/package/ip-address)
+[![npm]](https://www.npmjs.com/package/ip-address)
+[![snyk]](https://snyk.io/test/github/beaugunderson/ip-address)
+
+[codecov]: https://codecov.io/github/beaugunderson/ip-address/coverage.svg?branch=master
+[downloads]: https://img.shields.io/npm/dm/ip-address.svg
+[npm]: https://img.shields.io/npm/v/ip-address.svg
+[snyk]: https://snyk.io/test/github/beaugunderson/ip-address/badge.svg
+
+## ip-address
+
+`ip-address` is a library for validating and manipulating IPv4 and IPv6
+addresses in JavaScript.
+
+### Upgrading from 9.x to 10.x
+
+The dependency on `jsbn` was removed thanks to
+[michal-kocarek](https://github.com/michal-kocarek). Thanks Michal! For
+clarity, all methods with BigInteger in the name were renamed to BigInt.
+
+#### Breaking changes
+
+- `#fromBigInteger()` → `#fromBigInt()`; now returns a native BigInt
+- `#bigInteger()` → `#bigInt()`; now returns a native BigInt
+
+### Documentation
+
+Documentation is available at [ip-address.js.org](http://ip-address.js.org/).
+
+### Examples
+
+```js
+var Address6 = require('ip-address').Address6;
+
+var address = new Address6('2001:0:ce49:7601:e866:efff:62c3:fffe');
+
+var teredo = address.inspectTeredo();
+
+teredo.client4;    // '157.60.0.1'
+```
+
+### Features
+
+- Usable via CommonJS or ESM
+- Parsing of all IPv6 notations
+- Parsing of IPv6 addresses and ports from URLs with `Address6.fromURL(url)`
+- Validity checking
+- Decoding of the [Teredo
+  information](http://en.wikipedia.org/wiki/Teredo_tunneling#IPv6_addressing)
+  in an address
+- Whether one address is a valid subnet of another
+- What special properties a given address has (multicast prefix, unique
+  local address prefix, etc.)
+- Number of subnets of a certain size in a given address
+- Display methods
+  - Hex, binary, and decimal
+  - Canonical form
+  - Correct form
+  - IPv4-compatible (i.e. `::ffff:192.168.0.1`)
+- Works in [node](http://nodejs.org/) and the browser (with browserify)
+- ~1,600 test cases
+
+### Used by
+
+- [anon](https://github.com/edsu/anon) which powers
+  [@congressedits](https://twitter.com/congressedits), among
+  [many others](https://github.com/edsu/anon#community)
+- [base85](https://github.com/noseglid/base85): base85 encoding/decoding
+- [contrail-web-core](https://github.com/Juniper/contrail-web-core): part of
+  Contrail, a network virtualization solution made by Juniper Networks
+- [dhcpjs](https://github.com/apaprocki/node-dhcpjs): a DHCP client and server
+- [epochtalk](https://github.com/epochtalk/epochtalk): next generation forum
+  software
+- [geoip-web](https://github.com/tfrce/node-geoip-web): a server for
+  quickly geolocating IP addresses
+- [hexabus](https://github.com/mysmartgrid/hexabus): an IPv6-based home
+  automation bus
+- [hubot-deploy](https://github.com/atmos/hubot-deploy): GitHub Flow via hubot
+- [heroku-portscanner](https://github.com/robison/heroku-portscanner): nmap
+  hosted on Heroku
+- [ipfs-swarm](https://github.com/diasdavid/node-ipfs-swarm): a swarm
+  implementation based on IPFS
+- [javascript-x-server](https://github.com/GothAck/javascript-x-server): an X
+  server written in JavaScript
+- [libnmap](https://github.com/jas-/node-libnmap): a node API for nmap
+- [mail-io](https://github.com/mofux/mail-io): a lightweight SMTP server
+- [maxmind-db-reader](https://github.com/PaddeK/node-maxmind-db): a library for
+  reading MaxMind database files
+- [proxy-protocol-v2](https://github.com/ably/proxy-protocol-v2): a proxy
+  protocol encoder/decoder built by [Ably](https://www.ably.io/)
+- [Samsara](https://github.com/mariusGundersen/Samsara): a Docker web interface
+- [sis-api](https://github.com/sis-cmdb/sis-api): a configuration management
+  database API
+- [socks5-client](https://github.com/mattcg/socks5-client): a SOCKS v5 client
+- [socksified](https://github.com/vially/node-socksified): a SOCKS v5 client
+- [socksv5](https://github.com/mscdex/socksv5): a SOCKS v5 server/client
+- [ssdapi](https://github.com/rsolomou/ssdapi): an API created by the
+  University of Portsmouth
+- [SwitchyOmega](https://github.com/FelisCatus/SwitchyOmega): a [Chrome
+  extension](https://chrome.google.com/webstore/detail/padekgcemlokbadohgkifijomclgjgif)
+  for switching between multiple proxies with ~311k users!
+- [swiz](https://github.com/racker/node-swiz): a serialization framework built
+  and used by [Rackspace](http://www.rackspace.com/)
diff --git a/mqtt-backend/node_modules/ip-address/dist/address-error.d.ts b/mqtt-backend/node_modules/ip-address/dist/address-error.d.ts
new file mode 100644
index 0000000..59b2165
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/address-error.d.ts
@@ -0,0 +1,5 @@
+export declare class AddressError extends Error {
+    parseMessage?: string;
+    constructor(message: string, parseMessage?: string);
+}
+//# sourceMappingURL=address-error.d.ts.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/address-error.d.ts.map b/mqtt-backend/node_modules/ip-address/dist/address-error.d.ts.map
new file mode 100644
index 0000000..0ef7fa6
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/address-error.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"address-error.d.ts","sourceRoot":"","sources":["../src/address-error.ts"],"names":[],"mappings":"AAAA,qBAAa,YAAa,SAAQ,KAAK;IACrC,YAAY,CAAC,EAAE,MAAM,CAAC;gBAEV,OAAO,EAAE,MAAM,EAAE,YAAY,CAAC,EAAE,MAAM;CAOnD"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/address-error.js b/mqtt-backend/node_modules/ip-address/dist/address-error.js
new file mode 100644
index 0000000..c178ae4
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/address-error.js
@@ -0,0 +1,12 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.AddressError = void 0;
+class AddressError extends Error {
+    constructor(message, parseMessage) {
+        super(message);
+        this.name = 'AddressError';
+        this.parseMessage = parseMessage;
+    }
+}
+exports.AddressError = AddressError;
+//# sourceMappingURL=address-error.js.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/address-error.js.map b/mqtt-backend/node_modules/ip-address/dist/address-error.js.map
new file mode 100644
index 0000000..5d71d13
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/address-error.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"address-error.js","sourceRoot":"","sources":["../src/address-error.ts"],"names":[],"mappings":";;;AAAA,MAAa,YAAa,SAAQ,KAAK;IAGrC,YAAY,OAAe,EAAE,YAAqB;QAChD,KAAK,CAAC,OAAO,CAAC,CAAC;QAEf,IAAI,CAAC,IAAI,GAAG,cAAc,CAAC;QAE3B,IAAI,CAAC,YAAY,GAAG,YAAY,CAAC;IACnC,CAAC;CACF;AAVD,oCAUC"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/common.d.ts b/mqtt-backend/node_modules/ip-address/dist/common.d.ts
new file mode 100644
index 0000000..a4250d8
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/common.d.ts
@@ -0,0 +1,15 @@
+import { Address4 } from './ipv4';
+import { Address6 } from './ipv6';
+export interface ReverseFormOptions {
+    omitSuffix?: boolean;
+}
+export declare function isInSubnet(this: Address4 | Address6, address: Address4 | Address6): boolean;
+export declare function isCorrect(defaultBits: number): (this: Address4 | Address6) => boolean;
+export declare function numberToPaddedHex(number: number): string;
+export declare function stringToPaddedHex(numberString: string): string;
+/**
+ * @param binaryValue Binary representation of a value (e.g. `10`)
+ * @param position Byte position, where 0 is the least significant bit
+ */
+export declare function testBit(binaryValue: string, position: number): boolean;
+//# sourceMappingURL=common.d.ts.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/common.d.ts.map b/mqtt-backend/node_modules/ip-address/dist/common.d.ts.map
new file mode 100644
index 0000000..d13705a
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/common.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"common.d.ts","sourceRoot":"","sources":["../src/common.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,QAAQ,EAAE,MAAM,QAAQ,CAAC;AAClC,OAAO,EAAE,QAAQ,EAAE,MAAM,QAAQ,CAAC;AAElC,MAAM,WAAW,kBAAkB;IACjC,UAAU,CAAC,EAAE,OAAO,CAAC;CACtB;AAED,wBAAgB,UAAU,CAAC,IAAI,EAAE,QAAQ,GAAG,QAAQ,EAAE,OAAO,EAAE,QAAQ,GAAG,QAAQ,WAUjF;AAED,wBAAgB,SAAS,CAAC,WAAW,EAAE,MAAM,UACpB,QAAQ,GAAG,QAAQ,aAW3C;AAED,wBAAgB,iBAAiB,CAAC,MAAM,EAAE,MAAM,UAE/C;AAED,wBAAgB,iBAAiB,CAAC,YAAY,EAAE,MAAM,UAErD;AAED;;;GAGG;AACH,wBAAgB,OAAO,CAAC,WAAW,EAAE,MAAM,EAAE,QAAQ,EAAE,MAAM,GAAG,OAAO,CAStE"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/common.js b/mqtt-backend/node_modules/ip-address/dist/common.js
new file mode 100644
index 0000000..273a01e
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/common.js
@@ -0,0 +1,46 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.isInSubnet = isInSubnet;
+exports.isCorrect = isCorrect;
+exports.numberToPaddedHex = numberToPaddedHex;
+exports.stringToPaddedHex = stringToPaddedHex;
+exports.testBit = testBit;
+function isInSubnet(address) {
+    if (this.subnetMask < address.subnetMask) {
+        return false;
+    }
+    if (this.mask(address.subnetMask) === address.mask()) {
+        return true;
+    }
+    return false;
+}
+function isCorrect(defaultBits) {
+    return function () {
+        if (this.addressMinusSuffix !== this.correctForm()) {
+            return false;
+        }
+        if (this.subnetMask === defaultBits && !this.parsedSubnet) {
+            return true;
+        }
+        return this.parsedSubnet === String(this.subnetMask);
+    };
+}
+function numberToPaddedHex(number) {
+    return number.toString(16).padStart(2, '0');
+}
+function stringToPaddedHex(numberString) {
+    return numberToPaddedHex(parseInt(numberString, 10));
+}
+/**
+ * @param binaryValue Binary representation of a value (e.g. `10`)
+ * @param position Byte position, where 0 is the least significant bit
+ */
+function testBit(binaryValue, position) {
+    const { length } = binaryValue;
+    if (position > length) {
+        return false;
+    }
+    const positionInString = length - position;
+    return binaryValue.substring(positionInString, positionInString + 1) === '1';
+}
+//# sourceMappingURL=common.js.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/common.js.map b/mqtt-backend/node_modules/ip-address/dist/common.js.map
new file mode 100644
index 0000000..036ce66
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/common.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"common.js","sourceRoot":"","sources":["../src/common.ts"],"names":[],"mappings":";;AAOA,gCAUC;AAED,8BAYC;AAED,8CAEC;AAED,8CAEC;AAMD,0BASC;AA/CD,SAAgB,UAAU,CAA4B,OAA4B;IAChF,IAAI,IAAI,CAAC,UAAU,GAAG,OAAO,CAAC,UAAU,EAAE,CAAC;QACzC,OAAO,KAAK,CAAC;IACf,CAAC;IAED,IAAI,IAAI,CAAC,IAAI,CAAC,OAAO,CAAC,UAAU,CAAC,KAAK,OAAO,CAAC,IAAI,EAAE,EAAE,CAAC;QACrD,OAAO,IAAI,CAAC;IACd,CAAC;IAED,OAAO,KAAK,CAAC;AACf,CAAC;AAED,SAAgB,SAAS,CAAC,WAAmB;IAC3C,OAAO;QACL,IAAI,IAAI,CAAC,kBAAkB,KAAK,IAAI,CAAC,WAAW,EAAE,EAAE,CAAC;YACnD,OAAO,KAAK,CAAC;QACf,CAAC;QAED,IAAI,IAAI,CAAC,UAAU,KAAK,WAAW,IAAI,CAAC,IAAI,CAAC,YAAY,EAAE,CAAC;YAC1D,OAAO,IAAI,CAAC;QACd,CAAC;QAED,OAAO,IAAI,CAAC,YAAY,KAAK,MAAM,CAAC,IAAI,CAAC,UAAU,CAAC,CAAC;IACvD,CAAC,CAAC;AACJ,CAAC;AAED,SAAgB,iBAAiB,CAAC,MAAc;IAC9C,OAAO,MAAM,CAAC,QAAQ,CAAC,EAAE,CAAC,CAAC,QAAQ,CAAC,CAAC,EAAE,GAAG,CAAC,CAAC;AAC9C,CAAC;AAED,SAAgB,iBAAiB,CAAC,YAAoB;IACpD,OAAO,iBAAiB,CAAC,QAAQ,CAAC,YAAY,EAAE,EAAE,CAAC,CAAC,CAAC;AACvD,CAAC;AAED;;;GAGG;AACH,SAAgB,OAAO,CAAC,WAAmB,EAAE,QAAgB;IAC3D,MAAM,EAAE,MAAM,EAAE,GAAG,WAAW,CAAC;IAE/B,IAAI,QAAQ,GAAG,MAAM,EAAE,CAAC;QACtB,OAAO,KAAK,CAAC;IACf,CAAC;IAED,MAAM,gBAAgB,GAAG,MAAM,GAAG,QAAQ,CAAC;IAC3C,OAAO,WAAW,CAAC,SAAS,CAAC,gBAAgB,EAAE,gBAAgB,GAAG,CAAC,CAAC,KAAK,GAAG,CAAC;AAC/E,CAAC"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ip-address.d.ts b/mqtt-backend/node_modules/ip-address/dist/ip-address.d.ts
new file mode 100644
index 0000000..14f8fe0
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ip-address.d.ts
@@ -0,0 +1,8 @@
+export { Address4 } from './ipv4';
+export { Address6 } from './ipv6';
+export { AddressError } from './address-error';
+import * as helpers from './v6/helpers';
+export declare const v6: {
+    helpers: typeof helpers;
+};
+//# sourceMappingURL=ip-address.d.ts.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ip-address.d.ts.map b/mqtt-backend/node_modules/ip-address/dist/ip-address.d.ts.map
new file mode 100644
index 0000000..7bcb98a
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ip-address.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"ip-address.d.ts","sourceRoot":"","sources":["../src/ip-address.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,QAAQ,EAAE,MAAM,QAAQ,CAAC;AAClC,OAAO,EAAE,QAAQ,EAAE,MAAM,QAAQ,CAAC;AAClC,OAAO,EAAE,YAAY,EAAE,MAAM,iBAAiB,CAAC;AAE/C,OAAO,KAAK,OAAO,MAAM,cAAc,CAAC;AAExC,eAAO,MAAM,EAAE;;CAAc,CAAC"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ip-address.js b/mqtt-backend/node_modules/ip-address/dist/ip-address.js
new file mode 100644
index 0000000..84f3487
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ip-address.js
@@ -0,0 +1,35 @@
+"use strict";
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
+    return result;
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.v6 = exports.AddressError = exports.Address6 = exports.Address4 = void 0;
+var ipv4_1 = require("./ipv4");
+Object.defineProperty(exports, "Address4", { enumerable: true, get: function () { return ipv4_1.Address4; } });
+var ipv6_1 = require("./ipv6");
+Object.defineProperty(exports, "Address6", { enumerable: true, get: function () { return ipv6_1.Address6; } });
+var address_error_1 = require("./address-error");
+Object.defineProperty(exports, "AddressError", { enumerable: true, get: function () { return address_error_1.AddressError; } });
+const helpers = __importStar(require("./v6/helpers"));
+exports.v6 = { helpers };
+//# sourceMappingURL=ip-address.js.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ip-address.js.map b/mqtt-backend/node_modules/ip-address/dist/ip-address.js.map
new file mode 100644
index 0000000..cb89ed3
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ip-address.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"ip-address.js","sourceRoot":"","sources":["../src/ip-address.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;;;;;;;;;;AAAA,+BAAkC;AAAzB,gGAAA,QAAQ,OAAA;AACjB,+BAAkC;AAAzB,gGAAA,QAAQ,OAAA;AACjB,iDAA+C;AAAtC,6GAAA,YAAY,OAAA;AAErB,sDAAwC;AAE3B,QAAA,EAAE,GAAG,EAAE,OAAO,EAAE,CAAC"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ipv4.d.ts b/mqtt-backend/node_modules/ip-address/dist/ipv4.d.ts
new file mode 100644
index 0000000..28edbaa
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ipv4.d.ts
@@ -0,0 +1,209 @@
+import * as common from './common';
+/**
+ * Represents an IPv4 address
+ * @class Address4
+ * @param {string} address - An IPv4 address string
+ */
+export declare class Address4 {
+    address: string;
+    addressMinusSuffix?: string;
+    groups: number;
+    parsedAddress: string[];
+    parsedSubnet: string;
+    subnet: string;
+    subnetMask: number;
+    v4: boolean;
+    constructor(address: string);
+    static isValid(address: string): boolean;
+    parse(address: string): string[];
+    /**
+     * Returns the correct form of an address
+     * @memberof Address4
+     * @instance
+     * @returns {String}
+     */
+    correctForm(): string;
+    /**
+     * Returns true if the address is correct, false otherwise
+     * @memberof Address4
+     * @instance
+     * @returns {Boolean}
+     */
+    isCorrect: (this: Address4 | import("./ipv6").Address6) => boolean;
+    /**
+     * Converts a hex string to an IPv4 address object
+     * @memberof Address4
+     * @static
+     * @param {string} hex - a hex string to convert
+     * @returns {Address4}
+     */
+    static fromHex(hex: string): Address4;
+    /**
+     * Converts an integer into a IPv4 address object
+     * @memberof Address4
+     * @static
+     * @param {integer} integer - a number to convert
+     * @returns {Address4}
+     */
+    static fromInteger(integer: number): Address4;
+    /**
+     * Return an address from in-addr.arpa form
+     * @memberof Address4
+     * @static
+     * @param {string} arpaFormAddress - an 'in-addr.arpa' form ipv4 address
+     * @returns {Adress4}
+     * @example
+     * var address = Address4.fromArpa(42.2.0.192.in-addr.arpa.)
+     * address.correctForm(); // '192.0.2.42'
+     */
+    static fromArpa(arpaFormAddress: string): Address4;
+    /**
+     * Converts an IPv4 address object to a hex string
+     * @memberof Address4
+     * @instance
+     * @returns {String}
+     */
+    toHex(): string;
+    /**
+     * Converts an IPv4 address object to an array of bytes
+     * @memberof Address4
+     * @instance
+     * @returns {Array}
+     */
+    toArray(): number[];
+    /**
+     * Converts an IPv4 address object to an IPv6 address group
+     * @memberof Address4
+     * @instance
+     * @returns {String}
+     */
+    toGroup6(): string;
+    /**
+     * Returns the address as a `bigint`
+     * @memberof Address4
+     * @instance
+     * @returns {bigint}
+     */
+    bigInt(): bigint;
+    /**
+     * Helper function getting start address.
+     * @memberof Address4
+     * @instance
+     * @returns {bigint}
+     */
+    _startAddress(): bigint;
+    /**
+     * The first address in the range given by this address' subnet.
+     * Often referred to as the Network Address.
+     * @memberof Address4
+     * @instance
+     * @returns {Address4}
+     */
+    startAddress(): Address4;
+    /**
+     * The first host address in the range given by this address's subnet ie
+     * the first address after the Network Address
+     * @memberof Address4
+     * @instance
+     * @returns {Address4}
+     */
+    startAddressExclusive(): Address4;
+    /**
+     * Helper function getting end address.
+     * @memberof Address4
+     * @instance
+     * @returns {bigint}
+     */
+    _endAddress(): bigint;
+    /**
+     * The last address in the range given by this address' subnet
+     * Often referred to as the Broadcast
+     * @memberof Address4
+     * @instance
+     * @returns {Address4}
+     */
+    endAddress(): Address4;
+    /**
+     * The last host address in the range given by this address's subnet ie
+     * the last address prior to the Broadcast Address
+     * @memberof Address4
+     * @instance
+     * @returns {Address4}
+     */
+    endAddressExclusive(): Address4;
+    /**
+     * Converts a BigInt to a v4 address object
+     * @memberof Address4
+     * @static
+     * @param {bigint} bigInt - a BigInt to convert
+     * @returns {Address4}
+     */
+    static fromBigInt(bigInt: bigint): Address4;
+    /**
+     * Convert a byte array to an Address4 object
+     * @memberof Address4
+     * @static
+     * @param {Array<number>} bytes - an array of 4 bytes (0-255)
+     * @returns {Address4}
+     */
+    static fromByteArray(bytes: Array<number>): Address4;
+    /**
+     * Convert an unsigned byte array to an Address4 object
+     * @memberof Address4
+     * @static
+     * @param {Array<number>} bytes - an array of 4 unsigned bytes (0-255)
+     * @returns {Address4}
+     */
+    static fromUnsignedByteArray(bytes: Array<number>): Address4;
+    /**
+     * Returns the first n bits of the address, defaulting to the
+     * subnet mask
+     * @memberof Address4
+     * @instance
+     * @returns {String}
+     */
+    mask(mask?: number): string;
+    /**
+     * Returns the bits in the given range as a base-2 string
+     * @memberof Address4
+     * @instance
+     * @returns {string}
+     */
+    getBitsBase2(start: number, end: number): string;
+    /**
+     * Return the reversed ip6.arpa form of the address
+     * @memberof Address4
+     * @param {Object} options
+     * @param {boolean} options.omitSuffix - omit the "in-addr.arpa" suffix
+     * @instance
+     * @returns {String}
+     */
+    reverseForm(options?: common.ReverseFormOptions): string;
+    /**
+     * Returns true if the given address is in the subnet of the current address
+     * @memberof Address4
+     * @instance
+     * @returns {boolean}
+     */
+    isInSubnet: typeof common.isInSubnet;
+    /**
+     * Returns true if the given address is a multicast address
+     * @memberof Address4
+     * @instance
+     * @returns {boolean}
+     */
+    isMulticast(): boolean;
+    /**
+     * Returns a zero-padded base-2 string representation of the address
+     * @memberof Address4
+     * @instance
+     * @returns {string}
+     */
+    binaryZeroPad(): string;
+    /**
+     * Groups an IPv4 address for inclusion at the end of an IPv6 address
+     * @returns {String}
+     */
+    groupForV6(): string;
+}
+//# sourceMappingURL=ipv4.d.ts.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ipv4.d.ts.map b/mqtt-backend/node_modules/ip-address/dist/ipv4.d.ts.map
new file mode 100644
index 0000000..165d459
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ipv4.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"ipv4.d.ts","sourceRoot":"","sources":["../src/ipv4.ts"],"names":[],"mappings":"AAEA,OAAO,KAAK,MAAM,MAAM,UAAU,CAAC;AAInC;;;;GAIG;AACH,qBAAa,QAAQ;IACnB,OAAO,EAAE,MAAM,CAAC;IAChB,kBAAkB,CAAC,EAAE,MAAM,CAAC;IAC5B,MAAM,EAAE,MAAM,CAAoB;IAClC,aAAa,EAAE,MAAM,EAAE,CAAM;IAC7B,YAAY,EAAE,MAAM,CAAM;IAC1B,MAAM,EAAE,MAAM,CAAS;IACvB,UAAU,EAAE,MAAM,CAAM;IACxB,EAAE,EAAE,OAAO,CAAQ;gBAEP,OAAO,EAAE,MAAM;IAsB3B,MAAM,CAAC,OAAO,CAAC,OAAO,EAAE,MAAM,GAAG,OAAO;IAcxC,KAAK,CAAC,OAAO,EAAE,MAAM;IAUrB;;;;;OAKG;IACH,WAAW,IAAI,MAAM;IAIrB;;;;;OAKG;IACH,SAAS,0DAAoC;IAE7C;;;;;;OAMG;IACH,MAAM,CAAC,OAAO,CAAC,GAAG,EAAE,MAAM,GAAG,QAAQ;IAcrC;;;;;;OAMG;IACH,MAAM,CAAC,WAAW,CAAC,OAAO,EAAE,MAAM,GAAG,QAAQ;IAI7C;;;;;;;;;OASG;IACH,MAAM,CAAC,QAAQ,CAAC,eAAe,EAAE,MAAM,GAAG,QAAQ;IASlD;;;;;OAKG;IACH,KAAK,IAAI,MAAM;IAIf;;;;;OAKG;IACH,OAAO,IAAI,MAAM,EAAE;IAInB;;;;;OAKG;IACH,QAAQ,IAAI,MAAM;IAelB;;;;;OAKG;IACH,MAAM,IAAI,MAAM;IAIhB;;;;;OAKG;IACH,aAAa,IAAI,MAAM;IAIvB;;;;;;OAMG;IACH,YAAY,IAAI,QAAQ;IAIxB;;;;;;OAMG;IACH,qBAAqB,IAAI,QAAQ;IAKjC;;;;;OAKG;IACH,WAAW,IAAI,MAAM;IAIrB;;;;;;OAMG;IACH,UAAU,IAAI,QAAQ;IAItB;;;;;;OAMG;IACH,mBAAmB,IAAI,QAAQ;IAK/B;;;;;;OAMG;IACH,MAAM,CAAC,UAAU,CAAC,MAAM,EAAE,MAAM,GAAG,QAAQ;IAI3C;;;;;;OAMG;IACH,MAAM,CAAC,aAAa,CAAC,KAAK,EAAE,KAAK,CAAC,MAAM,CAAC,GAAG,QAAQ;IAepD;;;;;;OAMG;IACH,MAAM,CAAC,qBAAqB,CAAC,KAAK,EAAE,KAAK,CAAC,MAAM,CAAC,GAAG,QAAQ;IAS5D;;;;;;OAMG;IACH,IAAI,CAAC,IAAI,CAAC,EAAE,MAAM,GAAG,MAAM;IAQ3B;;;;;OAKG;IACH,YAAY,CAAC,KAAK,EAAE,MAAM,EAAE,GAAG,EAAE,MAAM,GAAG,MAAM;IAIhD;;;;;;;OAOG;IACH,WAAW,CAAC,OAAO,CAAC,EAAE,MAAM,CAAC,kBAAkB,GAAG,MAAM;IAcxD;;;;;OAKG;IACH,UAAU,2BAAqB;IAE/B;;;;;OAKG;IACH,WAAW,IAAI,OAAO;IAItB;;;;;OAKG;IACH,aAAa,IAAI,MAAM;IAIvB;;;OAGG;IACH,UAAU,IAAI,MAAM;CAYrB"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ipv4.js b/mqtt-backend/node_modules/ip-address/dist/ipv4.js
new file mode 100644
index 0000000..311c89c
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ipv4.js
@@ -0,0 +1,360 @@
+"use strict";
+/* eslint-disable no-param-reassign */
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
+    return result;
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.Address4 = void 0;
+const common = __importStar(require("./common"));
+const constants = __importStar(require("./v4/constants"));
+const address_error_1 = require("./address-error");
+/**
+ * Represents an IPv4 address
+ * @class Address4
+ * @param {string} address - An IPv4 address string
+ */
+class Address4 {
+    constructor(address) {
+        this.groups = constants.GROUPS;
+        this.parsedAddress = [];
+        this.parsedSubnet = '';
+        this.subnet = '/32';
+        this.subnetMask = 32;
+        this.v4 = true;
+        /**
+         * Returns true if the address is correct, false otherwise
+         * @memberof Address4
+         * @instance
+         * @returns {Boolean}
+         */
+        this.isCorrect = common.isCorrect(constants.BITS);
+        /**
+         * Returns true if the given address is in the subnet of the current address
+         * @memberof Address4
+         * @instance
+         * @returns {boolean}
+         */
+        this.isInSubnet = common.isInSubnet;
+        this.address = address;
+        const subnet = constants.RE_SUBNET_STRING.exec(address);
+        if (subnet) {
+            this.parsedSubnet = subnet[0].replace('/', '');
+            this.subnetMask = parseInt(this.parsedSubnet, 10);
+            this.subnet = `/${this.subnetMask}`;
+            if (this.subnetMask < 0 || this.subnetMask > constants.BITS) {
+                throw new address_error_1.AddressError('Invalid subnet mask.');
+            }
+            address = address.replace(constants.RE_SUBNET_STRING, '');
+        }
+        this.addressMinusSuffix = address;
+        this.parsedAddress = this.parse(address);
+    }
+    static isValid(address) {
+        try {
+            // eslint-disable-next-line no-new
+            new Address4(address);
+            return true;
+        }
+        catch (e) {
+            return false;
+        }
+    }
+    /*
+     * Parses a v4 address
+     */
+    parse(address) {
+        const groups = address.split('.');
+        if (!address.match(constants.RE_ADDRESS)) {
+            throw new address_error_1.AddressError('Invalid IPv4 address.');
+        }
+        return groups;
+    }
+    /**
+     * Returns the correct form of an address
+     * @memberof Address4
+     * @instance
+     * @returns {String}
+     */
+    correctForm() {
+        return this.parsedAddress.map((part) => parseInt(part, 10)).join('.');
+    }
+    /**
+     * Converts a hex string to an IPv4 address object
+     * @memberof Address4
+     * @static
+     * @param {string} hex - a hex string to convert
+     * @returns {Address4}
+     */
+    static fromHex(hex) {
+        const padded = hex.replace(/:/g, '').padStart(8, '0');
+        const groups = [];
+        let i;
+        for (i = 0; i < 8; i += 2) {
+            const h = padded.slice(i, i + 2);
+            groups.push(parseInt(h, 16));
+        }
+        return new Address4(groups.join('.'));
+    }
+    /**
+     * Converts an integer into a IPv4 address object
+     * @memberof Address4
+     * @static
+     * @param {integer} integer - a number to convert
+     * @returns {Address4}
+     */
+    static fromInteger(integer) {
+        return Address4.fromHex(integer.toString(16));
+    }
+    /**
+     * Return an address from in-addr.arpa form
+     * @memberof Address4
+     * @static
+     * @param {string} arpaFormAddress - an 'in-addr.arpa' form ipv4 address
+     * @returns {Adress4}
+     * @example
+     * var address = Address4.fromArpa(42.2.0.192.in-addr.arpa.)
+     * address.correctForm(); // '192.0.2.42'
+     */
+    static fromArpa(arpaFormAddress) {
+        // remove ending ".in-addr.arpa." or just "."
+        const leader = arpaFormAddress.replace(/(\.in-addr\.arpa)?\.$/, '');
+        const address = leader.split('.').reverse().join('.');
+        return new Address4(address);
+    }
+    /**
+     * Converts an IPv4 address object to a hex string
+     * @memberof Address4
+     * @instance
+     * @returns {String}
+     */
+    toHex() {
+        return this.parsedAddress.map((part) => common.stringToPaddedHex(part)).join(':');
+    }
+    /**
+     * Converts an IPv4 address object to an array of bytes
+     * @memberof Address4
+     * @instance
+     * @returns {Array}
+     */
+    toArray() {
+        return this.parsedAddress.map((part) => parseInt(part, 10));
+    }
+    /**
+     * Converts an IPv4 address object to an IPv6 address group
+     * @memberof Address4
+     * @instance
+     * @returns {String}
+     */
+    toGroup6() {
+        const output = [];
+        let i;
+        for (i = 0; i < constants.GROUPS; i += 2) {
+            output.push(`${common.stringToPaddedHex(this.parsedAddress[i])}${common.stringToPaddedHex(this.parsedAddress[i + 1])}`);
+        }
+        return output.join(':');
+    }
+    /**
+     * Returns the address as a `bigint`
+     * @memberof Address4
+     * @instance
+     * @returns {bigint}
+     */
+    bigInt() {
+        return BigInt(`0x${this.parsedAddress.map((n) => common.stringToPaddedHex(n)).join('')}`);
+    }
+    /**
+     * Helper function getting start address.
+     * @memberof Address4
+     * @instance
+     * @returns {bigint}
+     */
+    _startAddress() {
+        return BigInt(`0b${this.mask() + '0'.repeat(constants.BITS - this.subnetMask)}`);
+    }
+    /**
+     * The first address in the range given by this address' subnet.
+     * Often referred to as the Network Address.
+     * @memberof Address4
+     * @instance
+     * @returns {Address4}
+     */
+    startAddress() {
+        return Address4.fromBigInt(this._startAddress());
+    }
+    /**
+     * The first host address in the range given by this address's subnet ie
+     * the first address after the Network Address
+     * @memberof Address4
+     * @instance
+     * @returns {Address4}
+     */
+    startAddressExclusive() {
+        const adjust = BigInt('1');
+        return Address4.fromBigInt(this._startAddress() + adjust);
+    }
+    /**
+     * Helper function getting end address.
+     * @memberof Address4
+     * @instance
+     * @returns {bigint}
+     */
+    _endAddress() {
+        return BigInt(`0b${this.mask() + '1'.repeat(constants.BITS - this.subnetMask)}`);
+    }
+    /**
+     * The last address in the range given by this address' subnet
+     * Often referred to as the Broadcast
+     * @memberof Address4
+     * @instance
+     * @returns {Address4}
+     */
+    endAddress() {
+        return Address4.fromBigInt(this._endAddress());
+    }
+    /**
+     * The last host address in the range given by this address's subnet ie
+     * the last address prior to the Broadcast Address
+     * @memberof Address4
+     * @instance
+     * @returns {Address4}
+     */
+    endAddressExclusive() {
+        const adjust = BigInt('1');
+        return Address4.fromBigInt(this._endAddress() - adjust);
+    }
+    /**
+     * Converts a BigInt to a v4 address object
+     * @memberof Address4
+     * @static
+     * @param {bigint} bigInt - a BigInt to convert
+     * @returns {Address4}
+     */
+    static fromBigInt(bigInt) {
+        return Address4.fromHex(bigInt.toString(16));
+    }
+    /**
+     * Convert a byte array to an Address4 object
+     * @memberof Address4
+     * @static
+     * @param {Array<number>} bytes - an array of 4 bytes (0-255)
+     * @returns {Address4}
+     */
+    static fromByteArray(bytes) {
+        if (bytes.length !== 4) {
+            throw new address_error_1.AddressError('IPv4 addresses require exactly 4 bytes');
+        }
+        // Validate that all bytes are within valid range (0-255)
+        for (let i = 0; i < bytes.length; i++) {
+            if (!Number.isInteger(bytes[i]) || bytes[i] < 0 || bytes[i] > 255) {
+                throw new address_error_1.AddressError('All bytes must be integers between 0 and 255');
+            }
+        }
+        return this.fromUnsignedByteArray(bytes);
+    }
+    /**
+     * Convert an unsigned byte array to an Address4 object
+     * @memberof Address4
+     * @static
+     * @param {Array<number>} bytes - an array of 4 unsigned bytes (0-255)
+     * @returns {Address4}
+     */
+    static fromUnsignedByteArray(bytes) {
+        if (bytes.length !== 4) {
+            throw new address_error_1.AddressError('IPv4 addresses require exactly 4 bytes');
+        }
+        const address = bytes.join('.');
+        return new Address4(address);
+    }
+    /**
+     * Returns the first n bits of the address, defaulting to the
+     * subnet mask
+     * @memberof Address4
+     * @instance
+     * @returns {String}
+     */
+    mask(mask) {
+        if (mask === undefined) {
+            mask = this.subnetMask;
+        }
+        return this.getBitsBase2(0, mask);
+    }
+    /**
+     * Returns the bits in the given range as a base-2 string
+     * @memberof Address4
+     * @instance
+     * @returns {string}
+     */
+    getBitsBase2(start, end) {
+        return this.binaryZeroPad().slice(start, end);
+    }
+    /**
+     * Return the reversed ip6.arpa form of the address
+     * @memberof Address4
+     * @param {Object} options
+     * @param {boolean} options.omitSuffix - omit the "in-addr.arpa" suffix
+     * @instance
+     * @returns {String}
+     */
+    reverseForm(options) {
+        if (!options) {
+            options = {};
+        }
+        const reversed = this.correctForm().split('.').reverse().join('.');
+        if (options.omitSuffix) {
+            return reversed;
+        }
+        return `${reversed}.in-addr.arpa.`;
+    }
+    /**
+     * Returns true if the given address is a multicast address
+     * @memberof Address4
+     * @instance
+     * @returns {boolean}
+     */
+    isMulticast() {
+        return this.isInSubnet(new Address4('224.0.0.0/4'));
+    }
+    /**
+     * Returns a zero-padded base-2 string representation of the address
+     * @memberof Address4
+     * @instance
+     * @returns {string}
+     */
+    binaryZeroPad() {
+        return this.bigInt().toString(2).padStart(constants.BITS, '0');
+    }
+    /**
+     * Groups an IPv4 address for inclusion at the end of an IPv6 address
+     * @returns {String}
+     */
+    groupForV6() {
+        const segments = this.parsedAddress;
+        return this.address.replace(constants.RE_ADDRESS, `<span class="hover-group group-v4 group-6">${segments
+            .slice(0, 2)
+            .join('.')}</span>.<span class="hover-group group-v4 group-7">${segments
+            .slice(2, 4)
+            .join('.')}</span>`);
+    }
+}
+exports.Address4 = Address4;
+//# sourceMappingURL=ipv4.js.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ipv4.js.map b/mqtt-backend/node_modules/ip-address/dist/ipv4.js.map
new file mode 100644
index 0000000..2b4e928
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ipv4.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"ipv4.js","sourceRoot":"","sources":["../src/ipv4.ts"],"names":[],"mappings":";AAAA,sCAAsC;;;;;;;;;;;;;;;;;;;;;;;;;;AAEtC,iDAAmC;AACnC,0DAA4C;AAC5C,mDAA+C;AAE/C;;;;GAIG;AACH,MAAa,QAAQ;IAUnB,YAAY,OAAe;QAP3B,WAAM,GAAW,SAAS,CAAC,MAAM,CAAC;QAClC,kBAAa,GAAa,EAAE,CAAC;QAC7B,iBAAY,GAAW,EAAE,CAAC;QAC1B,WAAM,GAAW,KAAK,CAAC;QACvB,eAAU,GAAW,EAAE,CAAC;QACxB,OAAE,GAAY,IAAI,CAAC;QA0DnB;;;;;WAKG;QACH,cAAS,GAAG,MAAM,CAAC,SAAS,CAAC,SAAS,CAAC,IAAI,CAAC,CAAC;QA0Q7C;;;;;WAKG;QACH,eAAU,GAAG,MAAM,CAAC,UAAU,CAAC;QA7U7B,IAAI,CAAC,OAAO,GAAG,OAAO,CAAC;QAEvB,MAAM,MAAM,GAAG,SAAS,CAAC,gBAAgB,CAAC,IAAI,CAAC,OAAO,CAAC,CAAC;QAExD,IAAI,MAAM,EAAE,CAAC;YACX,IAAI,CAAC,YAAY,GAAG,MAAM,CAAC,CAAC,CAAC,CAAC,OAAO,CAAC,GAAG,EAAE,EAAE,CAAC,CAAC;YAC/C,IAAI,CAAC,UAAU,GAAG,QAAQ,CAAC,IAAI,CAAC,YAAY,EAAE,EAAE,CAAC,CAAC;YAClD,IAAI,CAAC,MAAM,GAAG,IAAI,IAAI,CAAC,UAAU,EAAE,CAAC;YAEpC,IAAI,IAAI,CAAC,UAAU,GAAG,CAAC,IAAI,IAAI,CAAC,UAAU,GAAG,SAAS,CAAC,IAAI,EAAE,CAAC;gBAC5D,MAAM,IAAI,4BAAY,CAAC,sBAAsB,CAAC,CAAC;YACjD,CAAC;YAED,OAAO,GAAG,OAAO,CAAC,OAAO,CAAC,SAAS,CAAC,gBAAgB,EAAE,EAAE,CAAC,CAAC;QAC5D,CAAC;QAED,IAAI,CAAC,kBAAkB,GAAG,OAAO,CAAC;QAElC,IAAI,CAAC,aAAa,GAAG,IAAI,CAAC,KAAK,CAAC,OAAO,CAAC,CAAC;IAC3C,CAAC;IAED,MAAM,CAAC,OAAO,CAAC,OAAe;QAC5B,IAAI,CAAC;YACH,kCAAkC;YAClC,IAAI,QAAQ,CAAC,OAAO,CAAC,CAAC;YAEtB,OAAO,IAAI,CAAC;QACd,CAAC;QAAC,OAAO,CAAC,EAAE,CAAC;YACX,OAAO,KAAK,CAAC;QACf,CAAC;IACH,CAAC;IAED;;OAEG;IACH,KAAK,CAAC,OAAe;QACnB,MAAM,MAAM,GAAG,OAAO,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC;QAElC,IAAI,CAAC,OAAO,CAAC,KAAK,CAAC,SAAS,CAAC,UAAU,CAAC,EAAE,CAAC;YACzC,MAAM,IAAI,4BAAY,CAAC,uBAAuB,CAAC,CAAC;QAClD,CAAC;QAED,OAAO,MAAM,CAAC;IAChB,CAAC;IAED;;;;;OAKG;IACH,WAAW;QACT,OAAO,IAAI,CAAC,aAAa,CAAC,GAAG,CAAC,CAAC,IAAI,EAAE,EAAE,CAAC,QAAQ,CAAC,IAAI,EAAE,EAAE,CAAC,CAAC,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC;IACxE,CAAC;IAUD;;;;;;OAMG;IACH,MAAM,CAAC,OAAO,CAAC,GAAW;QACxB,MAAM,MAAM,GAAG,GAAG,CAAC,OAAO,CAAC,IAAI,EAAE,EAAE,CAAC,CAAC,QAAQ,CAAC,CAAC,EAAE,GAAG,CAAC,CAAC;QACtD,MAAM,MAAM,GAAG,EAAE,CAAC;QAClB,IAAI,CAAC,CAAC;QAEN,KAAK,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,CAAC,EAAE,CAAC,IAAI,CAAC,EAAE,CAAC;YAC1B,MAAM,CAAC,GAAG,MAAM,CAAC,KAAK,CAAC,CAAC,EAAE,CAAC,GAAG,CAAC,CAAC,CAAC;YAEjC,MAAM,CAAC,IAAI,CAAC,QAAQ,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,CAAC;QAC/B,CAAC;QAED,OAAO,IAAI,QAAQ,CAAC,MAAM,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC,CAAC;IACxC,CAAC;IAED;;;;;;OAMG;IACH,MAAM,CAAC,WAAW,CAAC,OAAe;QAChC,OAAO,QAAQ,CAAC,OAAO,CAAC,OAAO,CAAC,QAAQ,CAAC,EAAE,CAAC,CAAC,CAAC;IAChD,CAAC;IAED;;;;;;;;;OASG;IACH,MAAM,CAAC,QAAQ,CAAC,eAAuB;QACrC,6CAA6C;QAC7C,MAAM,MAAM,GAAG,eAAe,CAAC,OAAO,CAAC,uBAAuB,EAAE,EAAE,CAAC,CAAC;QAEpE,MAAM,OAAO,GAAG,MAAM,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC,OAAO,EAAE,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC;QAEtD,OAAO,IAAI,QAAQ,CAAC,OAAO,CAAC,CAAC;IAC/B,CAAC;IAED;;;;;OAKG;IACH,KAAK;QACH,OAAO,IAAI,CAAC,aAAa,CAAC,GAAG,CAAC,CAAC,IAAI,EAAE,EAAE,CAAC,MAAM,CAAC,iBAAiB,CAAC,IAAI,CAAC,CAAC,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC;IACpF,CAAC;IAED;;;;;OAKG;IACH,OAAO;QACL,OAAO,IAAI,CAAC,aAAa,CAAC,GAAG,CAAC,CAAC,IAAI,EAAE,EAAE,CAAC,QAAQ,CAAC,IAAI,EAAE,EAAE,CAAC,CAAC,CAAC;IAC9D,CAAC;IAED;;;;;OAKG;IACH,QAAQ;QACN,MAAM,MAAM,GAAG,EAAE,CAAC;QAClB,IAAI,CAAC,CAAC;QAEN,KAAK,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,SAAS,CAAC,MAAM,EAAE,CAAC,IAAI,CAAC,EAAE,CAAC;YACzC,MAAM,CAAC,IAAI,CACT,GAAG,MAAM,CAAC,iBAAiB,CAAC,IAAI,CAAC,aAAa,CAAC,CAAC,CAAC,CAAC,GAAG,MAAM,CAAC,iBAAiB,CAC3E,IAAI,CAAC,aAAa,CAAC,CAAC,GAAG,CAAC,CAAC,CAC1B,EAAE,CACJ,CAAC;QACJ,CAAC;QAED,OAAO,MAAM,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC;IAC1B,CAAC;IAED;;;;;OAKG;IACH,MAAM;QACJ,OAAO,MAAM,CAAC,KAAK,IAAI,CAAC,aAAa,CAAC,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,MAAM,CAAC,iBAAiB,CAAC,CAAC,CAAC,CAAC,CAAC,IAAI,CAAC,EAAE,CAAC,EAAE,CAAC,CAAC;IAC5F,CAAC;IAED;;;;;OAKG;IACH,aAAa;QACX,OAAO,MAAM,CAAC,KAAK,IAAI,CAAC,IAAI,EAAE,GAAG,GAAG,CAAC,MAAM,CAAC,SAAS,CAAC,IAAI,GAAG,IAAI,CAAC,UAAU,CAAC,EAAE,CAAC,CAAC;IACnF,CAAC;IAED;;;;;;OAMG;IACH,YAAY;QACV,OAAO,QAAQ,CAAC,UAAU,CAAC,IAAI,CAAC,aAAa,EAAE,CAAC,CAAC;IACnD,CAAC;IAED;;;;;;OAMG;IACH,qBAAqB;QACnB,MAAM,MAAM,GAAG,MAAM,CAAC,GAAG,CAAC,CAAC;QAC3B,OAAO,QAAQ,CAAC,UAAU,CAAC,IAAI,CAAC,aAAa,EAAE,GAAG,MAAM,CAAC,CAAC;IAC5D,CAAC;IAED;;;;;OAKG;IACH,WAAW;QACT,OAAO,MAAM,CAAC,KAAK,IAAI,CAAC,IAAI,EAAE,GAAG,GAAG,CAAC,MAAM,CAAC,SAAS,CAAC,IAAI,GAAG,IAAI,CAAC,UAAU,CAAC,EAAE,CAAC,CAAC;IACnF,CAAC;IAED;;;;;;OAMG;IACH,UAAU;QACR,OAAO,QAAQ,CAAC,UAAU,CAAC,IAAI,CAAC,WAAW,EAAE,CAAC,CAAC;IACjD,CAAC;IAED;;;;;;OAMG;IACH,mBAAmB;QACjB,MAAM,MAAM,GAAG,MAAM,CAAC,GAAG,CAAC,CAAC;QAC3B,OAAO,QAAQ,CAAC,UAAU,CAAC,IAAI,CAAC,WAAW,EAAE,GAAG,MAAM,CAAC,CAAC;IAC1D,CAAC;IAED;;;;;;OAMG;IACH,MAAM,CAAC,UAAU,CAAC,MAAc;QAC9B,OAAO,QAAQ,CAAC,OAAO,CAAC,MAAM,CAAC,QAAQ,CAAC,EAAE,CAAC,CAAC,CAAC;IAC/C,CAAC;IAED;;;;;;OAMG;IACH,MAAM,CAAC,aAAa,CAAC,KAAoB;QACvC,IAAI,KAAK,CAAC,MAAM,KAAK,CAAC,EAAE,CAAC;YACvB,MAAM,IAAI,4BAAY,CAAC,wCAAwC,CAAC,CAAC;QACnE,CAAC;QAED,yDAAyD;QACzD,KAAK,IAAI,CAAC,GAAG,CAAC,EAAE,CAAC,GAAG,KAAK,CAAC,MAAM,EAAE,CAAC,EAAE,EAAE,CAAC;YACtC,IAAI,CAAC,MAAM,CAAC,SAAS,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC,IAAI,KAAK,CAAC,CAAC,CAAC,GAAG,CAAC,IAAI,KAAK,CAAC,CAAC,CAAC,GAAG,GAAG,EAAE,CAAC;gBAClE,MAAM,IAAI,4BAAY,CAAC,8CAA8C,CAAC,CAAC;YACzE,CAAC;QACH,CAAC;QAE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\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ipv6.d.ts b/mqtt-backend/node_modules/ip-address/dist/ipv6.d.ts
new file mode 100644
index 0000000..2a7c7e0
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ipv6.d.ts
@@ -0,0 +1,428 @@
+import * as common from './common';
+import { Address4 } from './ipv4';
+interface SixToFourProperties {
+    prefix: string;
+    gateway: string;
+}
+interface TeredoProperties {
+    prefix: string;
+    server4: string;
+    client4: string;
+    flags: string;
+    coneNat: boolean;
+    microsoft: {
+        reserved: boolean;
+        universalLocal: boolean;
+        groupIndividual: boolean;
+        nonce: string;
+    };
+    udpPort: string;
+}
+/**
+ * Represents an IPv6 address
+ * @class Address6
+ * @param {string} address - An IPv6 address string
+ * @param {number} [groups=8] - How many octets to parse
+ * @example
+ * var address = new Address6('2001::/32');
+ */
+export declare class Address6 {
+    address4?: Address4;
+    address: string;
+    addressMinusSuffix: string;
+    elidedGroups?: number;
+    elisionBegin?: number;
+    elisionEnd?: number;
+    groups: number;
+    parsedAddress4?: string;
+    parsedAddress: string[];
+    parsedSubnet: string;
+    subnet: string;
+    subnetMask: number;
+    v4: boolean;
+    zone: string;
+    constructor(address: string, optionalGroups?: number);
+    static isValid(address: string): boolean;
+    /**
+     * Convert a BigInt to a v6 address object
+     * @memberof Address6
+     * @static
+     * @param {bigint} bigInt - a BigInt to convert
+     * @returns {Address6}
+     * @example
+     * var bigInt = BigInt('1000000000000');
+     * var address = Address6.fromBigInt(bigInt);
+     * address.correctForm(); // '::e8:d4a5:1000'
+     */
+    static fromBigInt(bigInt: bigint): Address6;
+    /**
+     * Convert a URL (with optional port number) to an address object
+     * @memberof Address6
+     * @static
+     * @param {string} url - a URL with optional port number
+     * @example
+     * var addressAndPort = Address6.fromURL('http://[ffff::]:8080/foo/');
+     * addressAndPort.address.correctForm(); // 'ffff::'
+     * addressAndPort.port; // 8080
+     */
+    static fromURL(url: string): {
+        error: string;
+        address: null;
+        port: null;
+    } | {
+        address: Address6;
+        port: number | null;
+        error?: undefined;
+    };
+    /**
+     * Create an IPv6-mapped address given an IPv4 address
+     * @memberof Address6
+     * @static
+     * @param {string} address - An IPv4 address string
+     * @returns {Address6}
+     * @example
+     * var address = Address6.fromAddress4('192.168.0.1');
+     * address.correctForm(); // '::ffff:c0a8:1'
+     * address.to4in6(); // '::ffff:192.168.0.1'
+     */
+    static fromAddress4(address: string): Address6;
+    /**
+     * Return an address from ip6.arpa form
+     * @memberof Address6
+     * @static
+     * @param {string} arpaFormAddress - an 'ip6.arpa' form address
+     * @returns {Adress6}
+     * @example
+     * var address = Address6.fromArpa(e.f.f.f.3.c.2.6.f.f.f.e.6.6.8.e.1.0.6.7.9.4.e.c.0.0.0.0.1.0.0.2.ip6.arpa.)
+     * address.correctForm(); // '2001:0:ce49:7601:e866:efff:62c3:fffe'
+     */
+    static fromArpa(arpaFormAddress: string): Address6;
+    /**
+     * Return the Microsoft UNC transcription of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String} the Microsoft UNC transcription of the address
+     */
+    microsoftTranscription(): string;
+    /**
+     * Return the first n bits of the address, defaulting to the subnet mask
+     * @memberof Address6
+     * @instance
+     * @param {number} [mask=subnet] - the number of bits to mask
+     * @returns {String} the first n bits of the address as a string
+     */
+    mask(mask?: number): string;
+    /**
+     * Return the number of possible subnets of a given size in the address
+     * @memberof Address6
+     * @instance
+     * @param {number} [subnetSize=128] - the subnet size
+     * @returns {String}
+     */
+    possibleSubnets(subnetSize?: number): string;
+    /**
+     * Helper function getting start address.
+     * @memberof Address6
+     * @instance
+     * @returns {bigint}
+     */
+    _startAddress(): bigint;
+    /**
+     * The first address in the range given by this address' subnet
+     * Often referred to as the Network Address.
+     * @memberof Address6
+     * @instance
+     * @returns {Address6}
+     */
+    startAddress(): Address6;
+    /**
+     * The first host address in the range given by this address's subnet ie
+     * the first address after the Network Address
+     * @memberof Address6
+     * @instance
+     * @returns {Address6}
+     */
+    startAddressExclusive(): Address6;
+    /**
+     * Helper function getting end address.
+     * @memberof Address6
+     * @instance
+     * @returns {bigint}
+     */
+    _endAddress(): bigint;
+    /**
+     * The last address in the range given by this address' subnet
+     * Often referred to as the Broadcast
+     * @memberof Address6
+     * @instance
+     * @returns {Address6}
+     */
+    endAddress(): Address6;
+    /**
+     * The last host address in the range given by this address's subnet ie
+     * the last address prior to the Broadcast Address
+     * @memberof Address6
+     * @instance
+     * @returns {Address6}
+     */
+    endAddressExclusive(): Address6;
+    /**
+     * Return the scope of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    getScope(): string;
+    /**
+     * Return the type of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    getType(): string;
+    /**
+     * Return the bits in the given range as a BigInt
+     * @memberof Address6
+     * @instance
+     * @returns {bigint}
+     */
+    getBits(start: number, end: number): bigint;
+    /**
+     * Return the bits in the given range as a base-2 string
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    getBitsBase2(start: number, end: number): string;
+    /**
+     * Return the bits in the given range as a base-16 string
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    getBitsBase16(start: number, end: number): string;
+    /**
+     * Return the bits that are set past the subnet mask length
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    getBitsPastSubnet(): string;
+    /**
+     * Return the reversed ip6.arpa form of the address
+     * @memberof Address6
+     * @param {Object} options
+     * @param {boolean} options.omitSuffix - omit the "ip6.arpa" suffix
+     * @instance
+     * @returns {String}
+     */
+    reverseForm(options?: common.ReverseFormOptions): string;
+    /**
+     * Return the correct form of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    correctForm(): string;
+    /**
+     * Return a zero-padded base-2 string representation of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     * @example
+     * var address = new Address6('2001:4860:4001:803::1011');
+     * address.binaryZeroPad();
+     * // '0010000000000001010010000110000001000000000000010000100000000011
+     * //  0000000000000000000000000000000000000000000000000001000000010001'
+     */
+    binaryZeroPad(): string;
+    parse4in6(address: string): string;
+    parse(address: string): string[];
+    /**
+     * Return the canonical form of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    canonicalForm(): string;
+    /**
+     * Return the decimal form of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    decimal(): string;
+    /**
+     * Return the address as a BigInt
+     * @memberof Address6
+     * @instance
+     * @returns {bigint}
+     */
+    bigInt(): bigint;
+    /**
+     * Return the last two groups of this address as an IPv4 address string
+     * @memberof Address6
+     * @instance
+     * @returns {Address4}
+     * @example
+     * var address = new Address6('2001:4860:4001::1825:bf11');
+     * address.to4().correctForm(); // '24.37.191.17'
+     */
+    to4(): Address4;
+    /**
+     * Return the v4-in-v6 form of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    to4in6(): string;
+    /**
+     * Return an object containing the Teredo properties of the address
+     * @memberof Address6
+     * @instance
+     * @returns {Object}
+     */
+    inspectTeredo(): TeredoProperties;
+    /**
+     * Return an object containing the 6to4 properties of the address
+     * @memberof Address6
+     * @instance
+     * @returns {Object}
+     */
+    inspect6to4(): SixToFourProperties;
+    /**
+     * Return a v6 6to4 address from a v6 v4inv6 address
+     * @memberof Address6
+     * @instance
+     * @returns {Address6}
+     */
+    to6to4(): Address6 | null;
+    /**
+     * Return a byte array
+     * @memberof Address6
+     * @instance
+     * @returns {Array}
+     */
+    toByteArray(): number[];
+    /**
+     * Return an unsigned byte array
+     * @memberof Address6
+     * @instance
+     * @returns {Array}
+     */
+    toUnsignedByteArray(): number[];
+    /**
+     * Convert a byte array to an Address6 object
+     * @memberof Address6
+     * @static
+     * @returns {Address6}
+     */
+    static fromByteArray(bytes: Array<any>): Address6;
+    /**
+     * Convert an unsigned byte array to an Address6 object
+     * @memberof Address6
+     * @static
+     * @returns {Address6}
+     */
+    static fromUnsignedByteArray(bytes: Array<any>): Address6;
+    /**
+     * Returns true if the given address is in the subnet of the current address
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isInSubnet: typeof common.isInSubnet;
+    /**
+     * Returns true if the address is correct, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isCorrect: (this: Address4 | Address6) => boolean;
+    /**
+     * Returns true if the address is in the canonical form, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isCanonical(): boolean;
+    /**
+     * Returns true if the address is a link local address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isLinkLocal(): boolean;
+    /**
+     * Returns true if the address is a multicast address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isMulticast(): boolean;
+    /**
+     * Returns true if the address is a v4-in-v6 address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    is4(): boolean;
+    /**
+     * Returns true if the address is a Teredo address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isTeredo(): boolean;
+    /**
+     * Returns true if the address is a 6to4 address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    is6to4(): boolean;
+    /**
+     * Returns true if the address is a loopback address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isLoopback(): boolean;
+    /**
+     * @returns {String} the address in link form with a default port of 80
+     */
+    href(optionalPort?: number | string): string;
+    /**
+     * @returns {String} a link suitable for conveying the address via a URL hash
+     */
+    link(options?: {
+        className?: string;
+        prefix?: string;
+        v4?: boolean;
+    }): string;
+    /**
+     * Groups an address
+     * @returns {String}
+     */
+    group(): string;
+    /**
+     * Generate a regular expression string that can be used to find or validate
+     * all variations of this address
+     * @memberof Address6
+     * @instance
+     * @param {boolean} substringSearch
+     * @returns {string}
+     */
+    regularExpressionString(this: Address6, substringSearch?: boolean): string;
+    /**
+     * Generate a regular expression that can be used to find or validate all
+     * variations of this address.
+     * @memberof Address6
+     * @instance
+     * @param {boolean} substringSearch
+     * @returns {RegExp}
+     */
+    regularExpression(this: Address6, substringSearch?: boolean): RegExp;
+}
+export {};
+//# sourceMappingURL=ipv6.d.ts.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ipv6.d.ts.map b/mqtt-backend/node_modules/ip-address/dist/ipv6.d.ts.map
new file mode 100644
index 0000000..8b0fb00
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ipv6.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"ipv6.d.ts","sourceRoot":"","sources":["../src/ipv6.ts"],"names":[],"mappings":"AAGA,OAAO,KAAK,MAAM,MAAM,UAAU,CAAC;AAInC,OAAO,EAAE,QAAQ,EAAE,MAAM,QAAQ,CAAC;AA4DlC,UAAU,mBAAmB;IAC3B,MAAM,EAAE,MAAM,CAAC;IACf,OAAO,EAAE,MAAM,CAAC;CACjB;AAED,UAAU,gBAAgB;IACxB,MAAM,EAAE,MAAM,CAAC;IACf,OAAO,EAAE,MAAM,CAAC;IAChB,OAAO,EAAE,MAAM,CAAC;IAChB,KAAK,EAAE,MAAM,CAAC;IACd,OAAO,EAAE,OAAO,CAAC;IACjB,SAAS,EAAE;QACT,QAAQ,EAAE,OAAO,CAAC;QAClB,cAAc,EAAE,OAAO,CAAC;QACxB,eAAe,EAAE,OAAO,CAAC;QACzB,KAAK,EAAE,MAAM,CAAC;KACf,CAAC;IACF,OAAO,EAAE,MAAM,CAAC;CACjB;AAED;;;;;;;GAOG;AACH,qBAAa,QAAQ;IACnB,QAAQ,CAAC,EAAE,QAAQ,CAAC;IACpB,OAAO,EAAE,MAAM,CAAC;IAChB,kBAAkB,EAAE,MAAM,CAAM;IAChC,YAAY,CAAC,EAAE,MAAM,CAAC;IACtB,YAAY,CAAC,EAAE,MAAM,CAAC;IACtB,UAAU,CAAC,EAAE,MAAM,CAAC;IACpB,MAAM,EAAE,MAAM,CAAC;IACf,cAAc,CAAC,EAAE,MAAM,CAAC;IACxB,aAAa,EAAE,MAAM,EAAE,CAAC;IACxB,YAAY,EAAE,MAAM,CAAM;IAC1B,MAAM,EAAE,MAAM,CAAU;IACxB,UAAU,EAAE,MAAM,CAAO;IACzB,EAAE,EAAE,OAAO,CAAS;IACpB,IAAI,EAAE,MAAM,CAAM;gBAEN,OAAO,EAAE,MAAM,EAAE,cAAc,CAAC,EAAE,MAAM;IA0CpD,MAAM,CAAC,OAAO,CAAC,OAAO,EAAE,MAAM,GAAG,OAAO;IAWxC;;;;;;;;;;OAUG;IACH,MAAM,CAAC,UAAU,CAAC,MAAM,EAAE,MAAM,GAAG,QAAQ;IAY3C;;;;;;;;;OASG;IACH,MAAM,CAAC,OAAO,CAAC,GAAG,EAAE,MAAM;;;;;;;;;IA4D1B;;;;;;;;;;OAUG;IACH,MAAM,CAAC,YAAY,CAAC,OAAO,EAAE,MAAM,GAAG,QAAQ;IAQ9C;;;;;;;;;OASG;IACH,MAAM,CAAC,QAAQ,CAAC,eAAe,EAAE,MAAM,GAAG,QAAQ;IAsBlD;;;;;OAKG;IACH,sBAAsB,IAAI,MAAM;IAIhC;;;;;;OAMG;IACH,IAAI,CAAC,IAAI,GAAE,MAAwB,GAAG,MAAM;IAI5C;;;;;;OAMG;IAEH,eAAe,CAAC,UAAU,GAAE,MAAY,GAAG,MAAM;IAYjD;;;;;OAKG;IACH,aAAa,IAAI,MAAM;IAIvB;;;;;;OAMG;IACH,YAAY,IAAI,QAAQ;IAIxB;;;;;;OAMG;IACH,qBAAqB,IAAI,QAAQ;IAKjC;;;;;OAKG;IACH,WAAW,IAAI,MAAM;IAIrB;;;;;;OAMG;IACH,UAAU,IAAI,QAAQ;IAItB;;;;;;OAMG;IACH,mBAAmB,IAAI,QAAQ;IAK/B;;;;;OAKG;IACH,QAAQ,IAAI,MAAM;IAUlB;;;;;OAKG;IACH,OAAO,IAAI,MAAM;IAUjB;;;;;OAKG;IACH,OAAO,CAAC,KAAK,EAAE,MAAM,EAAE,GAAG,EAAE,MAAM,GAAG,MAAM;IAI3C;;;;;OAKG;IACH,YAAY,CAAC,KAAK,EAAE,MAAM,EAAE,GAAG,EAAE,MAAM,GAAG,MAAM;IAIhD;;;;;OAKG;IACH,aAAa,CAAC,KAAK,EAAE,MAAM,EAAE,GAAG,EAAE,MAAM,GAAG,MAAM;IAYjD;;;;;OAKG;IACH,iBAAiB,IAAI,MAAM;IAI3B;;;;;;;OAOG;IACH,WAAW,CAAC,OAAO,CAAC,EAAE,MAAM,CAAC,kBAAkB,GAAG,MAAM;IA6BxD;;;;;OAKG;IACH,WAAW,IAAI,MAAM;IAqDrB;;;;;;;;;;OAUG;IACH,aAAa,IAAI,MAAM;IAKvB,SAAS,CAAC,OAAO,EAAE,MAAM,GAAG,MAAM;IAoClC,KAAK,CAAC,OAAO,EAAE,MAAM,GAAG,MAAM,EAAE;IA0EhC;;;;;OAKG;IACH,aAAa,IAAI,MAAM;IAIvB;;;;;OAKG;IACH,OAAO,IAAI,MAAM;IAIjB;;;;;OAKG;IACH,MAAM,IAAI,MAAM;IAIhB;;;;;;;;OAQG;IACH,GAAG,IAAI,QAAQ;IAMf;;;;;OAKG;IACH,MAAM,IAAI,MAAM;IAehB;;;;;OAKG;IACH,aAAa,IAAI,gBAAgB;IA0DjC;;;;;OAKG;IACH,WAAW,IAAI,mBAAmB;IAgBlC;;;;;OAKG;IACH,MAAM,IAAI,QAAQ,GAAG,IAAI;IAgBzB;;;;;OAKG;IACH,WAAW,IAAI,MAAM,EAAE;IAcvB;;;;;OAKG;IACH,mBAAmB,IAAI,MAAM,EAAE;IAI/B;;;;;OAKG;IACH,MAAM,CAAC,aAAa,CAAC,KAAK,EAAE,KAAK,CAAC,GAAG,CAAC,GAAG,QAAQ;IAIjD;;;;;OAKG;IACH,MAAM,CAAC,qBAAqB,CAAC,KAAK,EAAE,KAAK,CAAC,GAAG,CAAC,GAAG,QAAQ;IAezD;;;;;OAKG;IACH,UAAU,2BAAqB;IAE/B;;;;;OAKG;IACH,SAAS,yCAAqC;IAE9C;;;;;OAKG;IACH,WAAW,IAAI,OAAO;IAItB;;;;;OAKG;IACH,WAAW,IAAI,OAAO;IAYtB;;;;;OAKG;IACH,WAAW,IAAI,OAAO;IAItB;;;;;OAKG;IACH,GAAG,IAAI,OAAO;IAId;;;;;OAKG;IACH,QAAQ,IAAI,OAAO;IAInB;;;;;OAKG;IACH,MAAM,IAAI,OAAO;IAIjB;;;;;OAKG;IACH,UAAU,IAAI,OAAO;IAMrB;;OAEG;IACH,IAAI,CAAC,YAAY,CAAC,EAAE,MAAM,GAAG,MAAM,GAAG,MAAM;IAU5C;;OAEG;IACH,IAAI,CAAC,OAAO,CAAC,EAAE;QAAE,SAAS,CAAC,EAAE,MAAM,CAAC;QAAC,MAAM,CAAC,EAAE,MAAM,CAAC;QAAC,EAAE,CAAC,EAAE,OAAO,CAAA;KAAE,GAAG,MAAM;IAoC7E;;;OAGG;IACH,KAAK,IAAI,MAAM;IA8Cf;;;;;;;OAOG;IACH,uBAAuB,CAAC,IAAI,EAAE,QAAQ,EAAE,eAAe,GAAE,OAAe,GAAG,MAAM;IAgDjF;;;;;;;OAOG;IACH,iBAAiB,CAAC,IAAI,EAAE,QAAQ,EAAE,eAAe,GAAE,OAAe,GAAG,MAAM;CAI5E"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ipv6.js b/mqtt-backend/node_modules/ip-address/dist/ipv6.js
new file mode 100644
index 0000000..9e5fd80
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ipv6.js
@@ -0,0 +1,1011 @@
+"use strict";
+/* eslint-disable prefer-destructuring */
+/* eslint-disable no-param-reassign */
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
+    return result;
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.Address6 = void 0;
+const common = __importStar(require("./common"));
+const constants4 = __importStar(require("./v4/constants"));
+const constants6 = __importStar(require("./v6/constants"));
+const helpers = __importStar(require("./v6/helpers"));
+const ipv4_1 = require("./ipv4");
+const regular_expressions_1 = require("./v6/regular-expressions");
+const address_error_1 = require("./address-error");
+const common_1 = require("./common");
+function assert(condition) {
+    if (!condition) {
+        throw new Error('Assertion failed.');
+    }
+}
+function addCommas(number) {
+    const r = /(\d+)(\d{3})/;
+    while (r.test(number)) {
+        number = number.replace(r, '$1,$2');
+    }
+    return number;
+}
+function spanLeadingZeroes4(n) {
+    n = n.replace(/^(0{1,})([1-9]+)$/, '<span class="parse-error">$1</span>$2');
+    n = n.replace(/^(0{1,})(0)$/, '<span class="parse-error">$1</span>$2');
+    return n;
+}
+/*
+ * A helper function to compact an array
+ */
+function compact(address, slice) {
+    const s1 = [];
+    const s2 = [];
+    let i;
+    for (i = 0; i < address.length; i++) {
+        if (i < slice[0]) {
+            s1.push(address[i]);
+        }
+        else if (i > slice[1]) {
+            s2.push(address[i]);
+        }
+    }
+    return s1.concat(['compact']).concat(s2);
+}
+function paddedHex(octet) {
+    return parseInt(octet, 16).toString(16).padStart(4, '0');
+}
+function unsignByte(b) {
+    // eslint-disable-next-line no-bitwise
+    return b & 0xff;
+}
+/**
+ * Represents an IPv6 address
+ * @class Address6
+ * @param {string} address - An IPv6 address string
+ * @param {number} [groups=8] - How many octets to parse
+ * @example
+ * var address = new Address6('2001::/32');
+ */
+class Address6 {
+    constructor(address, optionalGroups) {
+        this.addressMinusSuffix = '';
+        this.parsedSubnet = '';
+        this.subnet = '/128';
+        this.subnetMask = 128;
+        this.v4 = false;
+        this.zone = '';
+        // #region Attributes
+        /**
+         * Returns true if the given address is in the subnet of the current address
+         * @memberof Address6
+         * @instance
+         * @returns {boolean}
+         */
+        this.isInSubnet = common.isInSubnet;
+        /**
+         * Returns true if the address is correct, false otherwise
+         * @memberof Address6
+         * @instance
+         * @returns {boolean}
+         */
+        this.isCorrect = common.isCorrect(constants6.BITS);
+        if (optionalGroups === undefined) {
+            this.groups = constants6.GROUPS;
+        }
+        else {
+            this.groups = optionalGroups;
+        }
+        this.address = address;
+        const subnet = constants6.RE_SUBNET_STRING.exec(address);
+        if (subnet) {
+            this.parsedSubnet = subnet[0].replace('/', '');
+            this.subnetMask = parseInt(this.parsedSubnet, 10);
+            this.subnet = `/${this.subnetMask}`;
+            if (Number.isNaN(this.subnetMask) ||
+                this.subnetMask < 0 ||
+                this.subnetMask > constants6.BITS) {
+                throw new address_error_1.AddressError('Invalid subnet mask.');
+            }
+            address = address.replace(constants6.RE_SUBNET_STRING, '');
+        }
+        else if (/\//.test(address)) {
+            throw new address_error_1.AddressError('Invalid subnet mask.');
+        }
+        const zone = constants6.RE_ZONE_STRING.exec(address);
+        if (zone) {
+            this.zone = zone[0];
+            address = address.replace(constants6.RE_ZONE_STRING, '');
+        }
+        this.addressMinusSuffix = address;
+        this.parsedAddress = this.parse(this.addressMinusSuffix);
+    }
+    static isValid(address) {
+        try {
+            // eslint-disable-next-line no-new
+            new Address6(address);
+            return true;
+        }
+        catch (e) {
+            return false;
+        }
+    }
+    /**
+     * Convert a BigInt to a v6 address object
+     * @memberof Address6
+     * @static
+     * @param {bigint} bigInt - a BigInt to convert
+     * @returns {Address6}
+     * @example
+     * var bigInt = BigInt('1000000000000');
+     * var address = Address6.fromBigInt(bigInt);
+     * address.correctForm(); // '::e8:d4a5:1000'
+     */
+    static fromBigInt(bigInt) {
+        const hex = bigInt.toString(16).padStart(32, '0');
+        const groups = [];
+        let i;
+        for (i = 0; i < constants6.GROUPS; i++) {
+            groups.push(hex.slice(i * 4, (i + 1) * 4));
+        }
+        return new Address6(groups.join(':'));
+    }
+    /**
+     * Convert a URL (with optional port number) to an address object
+     * @memberof Address6
+     * @static
+     * @param {string} url - a URL with optional port number
+     * @example
+     * var addressAndPort = Address6.fromURL('http://[ffff::]:8080/foo/');
+     * addressAndPort.address.correctForm(); // 'ffff::'
+     * addressAndPort.port; // 8080
+     */
+    static fromURL(url) {
+        let host;
+        let port = null;
+        let result;
+        // If we have brackets parse them and find a port
+        if (url.indexOf('[') !== -1 && url.indexOf(']:') !== -1) {
+            result = constants6.RE_URL_WITH_PORT.exec(url);
+            if (result === null) {
+                return {
+                    error: 'failed to parse address with port',
+                    address: null,
+                    port: null,
+                };
+            }
+            host = result[1];
+            port = result[2];
+            // If there's a URL extract the address
+        }
+        else if (url.indexOf('/') !== -1) {
+            // Remove the protocol prefix
+            url = url.replace(/^[a-z0-9]+:\/\//, '');
+            // Parse the address
+            result = constants6.RE_URL.exec(url);
+            if (result === null) {
+                return {
+                    error: 'failed to parse address from URL',
+                    address: null,
+                    port: null,
+                };
+            }
+            host = result[1];
+            // Otherwise just assign the URL to the host and let the library parse it
+        }
+        else {
+            host = url;
+        }
+        // If there's a port convert it to an integer
+        if (port) {
+            port = parseInt(port, 10);
+            // squelch out of range ports
+            if (port < 0 || port > 65536) {
+                port = null;
+            }
+        }
+        else {
+            // Standardize `undefined` to `null`
+            port = null;
+        }
+        return {
+            address: new Address6(host),
+            port,
+        };
+    }
+    /**
+     * Create an IPv6-mapped address given an IPv4 address
+     * @memberof Address6
+     * @static
+     * @param {string} address - An IPv4 address string
+     * @returns {Address6}
+     * @example
+     * var address = Address6.fromAddress4('192.168.0.1');
+     * address.correctForm(); // '::ffff:c0a8:1'
+     * address.to4in6(); // '::ffff:192.168.0.1'
+     */
+    static fromAddress4(address) {
+        const address4 = new ipv4_1.Address4(address);
+        const mask6 = constants6.BITS - (constants4.BITS - address4.subnetMask);
+        return new Address6(`::ffff:${address4.correctForm()}/${mask6}`);
+    }
+    /**
+     * Return an address from ip6.arpa form
+     * @memberof Address6
+     * @static
+     * @param {string} arpaFormAddress - an 'ip6.arpa' form address
+     * @returns {Adress6}
+     * @example
+     * var address = Address6.fromArpa(e.f.f.f.3.c.2.6.f.f.f.e.6.6.8.e.1.0.6.7.9.4.e.c.0.0.0.0.1.0.0.2.ip6.arpa.)
+     * address.correctForm(); // '2001:0:ce49:7601:e866:efff:62c3:fffe'
+     */
+    static fromArpa(arpaFormAddress) {
+        // remove ending ".ip6.arpa." or just "."
+        let address = arpaFormAddress.replace(/(\.ip6\.arpa)?\.$/, '');
+        const semicolonAmount = 7;
+        // correct ip6.arpa form with ending removed will be 63 characters
+        if (address.length !== 63) {
+            throw new address_error_1.AddressError("Invalid 'ip6.arpa' form.");
+        }
+        const parts = address.split('.').reverse();
+        for (let i = semicolonAmount; i > 0; i--) {
+            const insertIndex = i * 4;
+            parts.splice(insertIndex, 0, ':');
+        }
+        address = parts.join('');
+        return new Address6(address);
+    }
+    /**
+     * Return the Microsoft UNC transcription of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String} the Microsoft UNC transcription of the address
+     */
+    microsoftTranscription() {
+        return `${this.correctForm().replace(/:/g, '-')}.ipv6-literal.net`;
+    }
+    /**
+     * Return the first n bits of the address, defaulting to the subnet mask
+     * @memberof Address6
+     * @instance
+     * @param {number} [mask=subnet] - the number of bits to mask
+     * @returns {String} the first n bits of the address as a string
+     */
+    mask(mask = this.subnetMask) {
+        return this.getBitsBase2(0, mask);
+    }
+    /**
+     * Return the number of possible subnets of a given size in the address
+     * @memberof Address6
+     * @instance
+     * @param {number} [subnetSize=128] - the subnet size
+     * @returns {String}
+     */
+    // TODO: probably useful to have a numeric version of this too
+    possibleSubnets(subnetSize = 128) {
+        const availableBits = constants6.BITS - this.subnetMask;
+        const subnetBits = Math.abs(subnetSize - constants6.BITS);
+        const subnetPowers = availableBits - subnetBits;
+        if (subnetPowers < 0) {
+            return '0';
+        }
+        return addCommas((BigInt('2') ** BigInt(subnetPowers)).toString(10));
+    }
+    /**
+     * Helper function getting start address.
+     * @memberof Address6
+     * @instance
+     * @returns {bigint}
+     */
+    _startAddress() {
+        return BigInt(`0b${this.mask() + '0'.repeat(constants6.BITS - this.subnetMask)}`);
+    }
+    /**
+     * The first address in the range given by this address' subnet
+     * Often referred to as the Network Address.
+     * @memberof Address6
+     * @instance
+     * @returns {Address6}
+     */
+    startAddress() {
+        return Address6.fromBigInt(this._startAddress());
+    }
+    /**
+     * The first host address in the range given by this address's subnet ie
+     * the first address after the Network Address
+     * @memberof Address6
+     * @instance
+     * @returns {Address6}
+     */
+    startAddressExclusive() {
+        const adjust = BigInt('1');
+        return Address6.fromBigInt(this._startAddress() + adjust);
+    }
+    /**
+     * Helper function getting end address.
+     * @memberof Address6
+     * @instance
+     * @returns {bigint}
+     */
+    _endAddress() {
+        return BigInt(`0b${this.mask() + '1'.repeat(constants6.BITS - this.subnetMask)}`);
+    }
+    /**
+     * The last address in the range given by this address' subnet
+     * Often referred to as the Broadcast
+     * @memberof Address6
+     * @instance
+     * @returns {Address6}
+     */
+    endAddress() {
+        return Address6.fromBigInt(this._endAddress());
+    }
+    /**
+     * The last host address in the range given by this address's subnet ie
+     * the last address prior to the Broadcast Address
+     * @memberof Address6
+     * @instance
+     * @returns {Address6}
+     */
+    endAddressExclusive() {
+        const adjust = BigInt('1');
+        return Address6.fromBigInt(this._endAddress() - adjust);
+    }
+    /**
+     * Return the scope of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    getScope() {
+        let scope = constants6.SCOPES[parseInt(this.getBits(12, 16).toString(10), 10)];
+        if (this.getType() === 'Global unicast' && scope !== 'Link local') {
+            scope = 'Global';
+        }
+        return scope || 'Unknown';
+    }
+    /**
+     * Return the type of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    getType() {
+        for (const subnet of Object.keys(constants6.TYPES)) {
+            if (this.isInSubnet(new Address6(subnet))) {
+                return constants6.TYPES[subnet];
+            }
+        }
+        return 'Global unicast';
+    }
+    /**
+     * Return the bits in the given range as a BigInt
+     * @memberof Address6
+     * @instance
+     * @returns {bigint}
+     */
+    getBits(start, end) {
+        return BigInt(`0b${this.getBitsBase2(start, end)}`);
+    }
+    /**
+     * Return the bits in the given range as a base-2 string
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    getBitsBase2(start, end) {
+        return this.binaryZeroPad().slice(start, end);
+    }
+    /**
+     * Return the bits in the given range as a base-16 string
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    getBitsBase16(start, end) {
+        const length = end - start;
+        if (length % 4 !== 0) {
+            throw new Error('Length of bits to retrieve must be divisible by four');
+        }
+        return this.getBits(start, end)
+            .toString(16)
+            .padStart(length / 4, '0');
+    }
+    /**
+     * Return the bits that are set past the subnet mask length
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    getBitsPastSubnet() {
+        return this.getBitsBase2(this.subnetMask, constants6.BITS);
+    }
+    /**
+     * Return the reversed ip6.arpa form of the address
+     * @memberof Address6
+     * @param {Object} options
+     * @param {boolean} options.omitSuffix - omit the "ip6.arpa" suffix
+     * @instance
+     * @returns {String}
+     */
+    reverseForm(options) {
+        if (!options) {
+            options = {};
+        }
+        const characters = Math.floor(this.subnetMask / 4);
+        const reversed = this.canonicalForm()
+            .replace(/:/g, '')
+            .split('')
+            .slice(0, characters)
+            .reverse()
+            .join('.');
+        if (characters > 0) {
+            if (options.omitSuffix) {
+                return reversed;
+            }
+            return `${reversed}.ip6.arpa.`;
+        }
+        if (options.omitSuffix) {
+            return '';
+        }
+        return 'ip6.arpa.';
+    }
+    /**
+     * Return the correct form of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    correctForm() {
+        let i;
+        let groups = [];
+        let zeroCounter = 0;
+        const zeroes = [];
+        for (i = 0; i < this.parsedAddress.length; i++) {
+            const value = parseInt(this.parsedAddress[i], 16);
+            if (value === 0) {
+                zeroCounter++;
+            }
+            if (value !== 0 && zeroCounter > 0) {
+                if (zeroCounter > 1) {
+                    zeroes.push([i - zeroCounter, i - 1]);
+                }
+                zeroCounter = 0;
+            }
+        }
+        // Do we end with a string of zeroes?
+        if (zeroCounter > 1) {
+            zeroes.push([this.parsedAddress.length - zeroCounter, this.parsedAddress.length - 1]);
+        }
+        const zeroLengths = zeroes.map((n) => n[1] - n[0] + 1);
+        if (zeroes.length > 0) {
+            const index = zeroLengths.indexOf(Math.max(...zeroLengths));
+            groups = compact(this.parsedAddress, zeroes[index]);
+        }
+        else {
+            groups = this.parsedAddress;
+        }
+        for (i = 0; i < groups.length; i++) {
+            if (groups[i] !== 'compact') {
+                groups[i] = parseInt(groups[i], 16).toString(16);
+            }
+        }
+        let correct = groups.join(':');
+        correct = correct.replace(/^compact$/, '::');
+        correct = correct.replace(/(^compact)|(compact$)/, ':');
+        correct = correct.replace(/compact/, '');
+        return correct;
+    }
+    /**
+     * Return a zero-padded base-2 string representation of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     * @example
+     * var address = new Address6('2001:4860:4001:803::1011');
+     * address.binaryZeroPad();
+     * // '0010000000000001010010000110000001000000000000010000100000000011
+     * //  0000000000000000000000000000000000000000000000000001000000010001'
+     */
+    binaryZeroPad() {
+        return this.bigInt().toString(2).padStart(constants6.BITS, '0');
+    }
+    // TODO: Improve the semantics of this helper function
+    parse4in6(address) {
+        const groups = address.split(':');
+        const lastGroup = groups.slice(-1)[0];
+        const address4 = lastGroup.match(constants4.RE_ADDRESS);
+        if (address4) {
+            this.parsedAddress4 = address4[0];
+            this.address4 = new ipv4_1.Address4(this.parsedAddress4);
+            for (let i = 0; i < this.address4.groups; i++) {
+                if (/^0[0-9]+/.test(this.address4.parsedAddress[i])) {
+                    // The prefix groups haven't been through the bad-character check
+                    // yet, so escape them before including in the error HTML.
+                    const highlighted = this.address4.parsedAddress.map(spanLeadingZeroes4).join('.');
+                    const prefix = groups.slice(0, -1).map(helpers.escapeHtml).join(':');
+                    const separator = groups.length > 1 ? ':' : '';
+                    throw new address_error_1.AddressError("IPv4 addresses can't have leading zeroes.", `${prefix}${separator}${highlighted}`);
+                }
+            }
+            this.v4 = true;
+            groups[groups.length - 1] = this.address4.toGroup6();
+            address = groups.join(':');
+        }
+        return address;
+    }
+    // TODO: Make private?
+    parse(address) {
+        address = this.parse4in6(address);
+        const badCharacters = address.match(constants6.RE_BAD_CHARACTERS);
+        if (badCharacters) {
+            throw new address_error_1.AddressError(`Bad character${badCharacters.length > 1 ? 's' : ''} detected in address: ${badCharacters.join('')}`, address.replace(constants6.RE_BAD_CHARACTERS, '<span class="parse-error">$1</span>'));
+        }
+        const badAddress = address.match(constants6.RE_BAD_ADDRESS);
+        if (badAddress) {
+            throw new address_error_1.AddressError(`Address failed regex: ${badAddress.join('')}`, address.replace(constants6.RE_BAD_ADDRESS, '<span class="parse-error">$1</span>'));
+        }
+        let groups = [];
+        const halves = address.split('::');
+        if (halves.length === 2) {
+            let first = halves[0].split(':');
+            let last = halves[1].split(':');
+            if (first.length === 1 && first[0] === '') {
+                first = [];
+            }
+            if (last.length === 1 && last[0] === '') {
+                last = [];
+            }
+            const remaining = this.groups - (first.length + last.length);
+            if (!remaining) {
+                throw new address_error_1.AddressError('Error parsing groups');
+            }
+            this.elidedGroups = remaining;
+            this.elisionBegin = first.length;
+            this.elisionEnd = first.length + this.elidedGroups;
+            groups = groups.concat(first);
+            for (let i = 0; i < remaining; i++) {
+                groups.push('0');
+            }
+            groups = groups.concat(last);
+        }
+        else if (halves.length === 1) {
+            groups = address.split(':');
+            this.elidedGroups = 0;
+        }
+        else {
+            throw new address_error_1.AddressError('Too many :: groups found');
+        }
+        groups = groups.map((group) => parseInt(group, 16).toString(16));
+        if (groups.length !== this.groups) {
+            throw new address_error_1.AddressError('Incorrect number of groups found');
+        }
+        return groups;
+    }
+    /**
+     * Return the canonical form of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    canonicalForm() {
+        return this.parsedAddress.map(paddedHex).join(':');
+    }
+    /**
+     * Return the decimal form of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    decimal() {
+        return this.parsedAddress.map((n) => parseInt(n, 16).toString(10).padStart(5, '0')).join(':');
+    }
+    /**
+     * Return the address as a BigInt
+     * @memberof Address6
+     * @instance
+     * @returns {bigint}
+     */
+    bigInt() {
+        return BigInt(`0x${this.parsedAddress.map(paddedHex).join('')}`);
+    }
+    /**
+     * Return the last two groups of this address as an IPv4 address string
+     * @memberof Address6
+     * @instance
+     * @returns {Address4}
+     * @example
+     * var address = new Address6('2001:4860:4001::1825:bf11');
+     * address.to4().correctForm(); // '24.37.191.17'
+     */
+    to4() {
+        const binary = this.binaryZeroPad().split('');
+        return ipv4_1.Address4.fromHex(BigInt(`0b${binary.slice(96, 128).join('')}`).toString(16));
+    }
+    /**
+     * Return the v4-in-v6 form of the address
+     * @memberof Address6
+     * @instance
+     * @returns {String}
+     */
+    to4in6() {
+        const address4 = this.to4();
+        const address6 = new Address6(this.parsedAddress.slice(0, 6).join(':'), 6);
+        const correct = address6.correctForm();
+        let infix = '';
+        if (!/:$/.test(correct)) {
+            infix = ':';
+        }
+        return correct + infix + address4.address;
+    }
+    /**
+     * Return an object containing the Teredo properties of the address
+     * @memberof Address6
+     * @instance
+     * @returns {Object}
+     */
+    inspectTeredo() {
+        /*
+        - Bits 0 to 31 are set to the Teredo prefix (normally 2001:0000::/32).
+        - Bits 32 to 63 embed the primary IPv4 address of the Teredo server that
+          is used.
+        - Bits 64 to 79 can be used to define some flags. Currently only the
+          higher order bit is used; it is set to 1 if the Teredo client is
+          located behind a cone NAT, 0 otherwise. For Microsoft's Windows Vista
+          and Windows Server 2008 implementations, more bits are used. In those
+          implementations, the format for these 16 bits is "CRAAAAUG AAAAAAAA",
+          where "C" remains the "Cone" flag. The "R" bit is reserved for future
+          use. The "U" bit is for the Universal/Local flag (set to 0). The "G" bit
+          is Individual/Group flag (set to 0). The A bits are set to a 12-bit
+          randomly generated number chosen by the Teredo client to introduce
+          additional protection for the Teredo node against IPv6-based scanning
+          attacks.
+        - Bits 80 to 95 contains the obfuscated UDP port number. This is the
+          port number that is mapped by the NAT to the Teredo client with all
+          bits inverted.
+        - Bits 96 to 127 contains the obfuscated IPv4 address. This is the
+          public IPv4 address of the NAT with all bits inverted.
+        */
+        const prefix = this.getBitsBase16(0, 32);
+        const bitsForUdpPort = this.getBits(80, 96);
+        // eslint-disable-next-line no-bitwise
+        const udpPort = (bitsForUdpPort ^ BigInt('0xffff')).toString();
+        const server4 = ipv4_1.Address4.fromHex(this.getBitsBase16(32, 64));
+        const bitsForClient4 = this.getBits(96, 128);
+        // eslint-disable-next-line no-bitwise
+        const client4 = ipv4_1.Address4.fromHex((bitsForClient4 ^ BigInt('0xffffffff')).toString(16));
+        const flagsBase2 = this.getBitsBase2(64, 80);
+        const coneNat = (0, common_1.testBit)(flagsBase2, 15);
+        const reserved = (0, common_1.testBit)(flagsBase2, 14);
+        const groupIndividual = (0, common_1.testBit)(flagsBase2, 8);
+        const universalLocal = (0, common_1.testBit)(flagsBase2, 9);
+        const nonce = BigInt(`0b${flagsBase2.slice(2, 6) + flagsBase2.slice(8, 16)}`).toString(10);
+        return {
+            prefix: `${prefix.slice(0, 4)}:${prefix.slice(4, 8)}`,
+            server4: server4.address,
+            client4: client4.address,
+            flags: flagsBase2,
+            coneNat,
+            microsoft: {
+                reserved,
+                universalLocal,
+                groupIndividual,
+                nonce,
+            },
+            udpPort,
+        };
+    }
+    /**
+     * Return an object containing the 6to4 properties of the address
+     * @memberof Address6
+     * @instance
+     * @returns {Object}
+     */
+    inspect6to4() {
+        /*
+        - Bits 0 to 15 are set to the 6to4 prefix (2002::/16).
+        - Bits 16 to 48 embed the IPv4 address of the 6to4 gateway that is used.
+        */
+        const prefix = this.getBitsBase16(0, 16);
+        const gateway = ipv4_1.Address4.fromHex(this.getBitsBase16(16, 48));
+        return {
+            prefix: prefix.slice(0, 4),
+            gateway: gateway.address,
+        };
+    }
+    /**
+     * Return a v6 6to4 address from a v6 v4inv6 address
+     * @memberof Address6
+     * @instance
+     * @returns {Address6}
+     */
+    to6to4() {
+        if (!this.is4()) {
+            return null;
+        }
+        const addr6to4 = [
+            '2002',
+            this.getBitsBase16(96, 112),
+            this.getBitsBase16(112, 128),
+            '',
+            '/16',
+        ].join(':');
+        return new Address6(addr6to4);
+    }
+    /**
+     * Return a byte array
+     * @memberof Address6
+     * @instance
+     * @returns {Array}
+     */
+    toByteArray() {
+        const valueWithoutPadding = this.bigInt().toString(16);
+        const leadingPad = '0'.repeat(valueWithoutPadding.length % 2);
+        const value = `${leadingPad}${valueWithoutPadding}`;
+        const bytes = [];
+        for (let i = 0, length = value.length; i < length; i += 2) {
+            bytes.push(parseInt(value.substring(i, i + 2), 16));
+        }
+        return bytes;
+    }
+    /**
+     * Return an unsigned byte array
+     * @memberof Address6
+     * @instance
+     * @returns {Array}
+     */
+    toUnsignedByteArray() {
+        return this.toByteArray().map(unsignByte);
+    }
+    /**
+     * Convert a byte array to an Address6 object
+     * @memberof Address6
+     * @static
+     * @returns {Address6}
+     */
+    static fromByteArray(bytes) {
+        return this.fromUnsignedByteArray(bytes.map(unsignByte));
+    }
+    /**
+     * Convert an unsigned byte array to an Address6 object
+     * @memberof Address6
+     * @static
+     * @returns {Address6}
+     */
+    static fromUnsignedByteArray(bytes) {
+        const BYTE_MAX = BigInt('256');
+        let result = BigInt('0');
+        let multiplier = BigInt('1');
+        for (let i = bytes.length - 1; i >= 0; i--) {
+            result += multiplier * BigInt(bytes[i].toString(10));
+            multiplier *= BYTE_MAX;
+        }
+        return Address6.fromBigInt(result);
+    }
+    /**
+     * Returns true if the address is in the canonical form, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isCanonical() {
+        return this.addressMinusSuffix === this.canonicalForm();
+    }
+    /**
+     * Returns true if the address is a link local address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isLinkLocal() {
+        // Zeroes are required, i.e. we can't check isInSubnet with 'fe80::/10'
+        if (this.getBitsBase2(0, 64) ===
+            '1111111010000000000000000000000000000000000000000000000000000000') {
+            return true;
+        }
+        return false;
+    }
+    /**
+     * Returns true if the address is a multicast address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isMulticast() {
+        return this.getType() === 'Multicast';
+    }
+    /**
+     * Returns true if the address is a v4-in-v6 address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    is4() {
+        return this.v4;
+    }
+    /**
+     * Returns true if the address is a Teredo address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isTeredo() {
+        return this.isInSubnet(new Address6('2001::/32'));
+    }
+    /**
+     * Returns true if the address is a 6to4 address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    is6to4() {
+        return this.isInSubnet(new Address6('2002::/16'));
+    }
+    /**
+     * Returns true if the address is a loopback address, false otherwise
+     * @memberof Address6
+     * @instance
+     * @returns {boolean}
+     */
+    isLoopback() {
+        return this.getType() === 'Loopback';
+    }
+    // #endregion
+    // #region HTML
+    /**
+     * @returns {String} the address in link form with a default port of 80
+     */
+    href(optionalPort) {
+        if (optionalPort === undefined) {
+            optionalPort = '';
+        }
+        else {
+            optionalPort = `:${optionalPort}`;
+        }
+        return `http://[${this.correctForm()}]${optionalPort}/`;
+    }
+    /**
+     * @returns {String} a link suitable for conveying the address via a URL hash
+     */
+    link(options) {
+        if (!options) {
+            options = {};
+        }
+        if (options.className === undefined) {
+            options.className = '';
+        }
+        if (options.prefix === undefined) {
+            options.prefix = '/#address=';
+        }
+        if (options.v4 === undefined) {
+            options.v4 = false;
+        }
+        let formFunction = this.correctForm;
+        if (options.v4) {
+            formFunction = this.to4in6;
+        }
+        const form = formFunction.call(this);
+        const safeHref = helpers.escapeHtml(`${options.prefix}${form}`);
+        const safeForm = helpers.escapeHtml(form);
+        if (options.className) {
+            const safeClass = helpers.escapeHtml(options.className);
+            return `<a href="${safeHref}" class="${safeClass}">${safeForm}</a>`;
+        }
+        return `<a href="${safeHref}">${safeForm}</a>`;
+    }
+    /**
+     * Groups an address
+     * @returns {String}
+     */
+    group() {
+        if (this.elidedGroups === 0) {
+            // The simple case
+            return helpers.simpleGroup(this.addressMinusSuffix).join(':');
+        }
+        assert(typeof this.elidedGroups === 'number');
+        assert(typeof this.elisionBegin === 'number');
+        // The elided case
+        const output = [];
+        const [left, right] = this.addressMinusSuffix.split('::');
+        if (left.length) {
+            output.push(...helpers.simpleGroup(left));
+        }
+        else {
+            output.push('');
+        }
+        const classes = ['hover-group'];
+        for (let i = this.elisionBegin; i < this.elisionBegin + this.elidedGroups; i++) {
+            classes.push(`group-${i}`);
+        }
+        output.push(`<span class="${classes.join(' ')}"></span>`);
+        if (right.length) {
+            output.push(...helpers.simpleGroup(right, this.elisionEnd));
+        }
+        else {
+            output.push('');
+        }
+        if (this.is4()) {
+            assert(this.address4 instanceof ipv4_1.Address4);
+            output.pop();
+            output.push(this.address4.groupForV6());
+        }
+        return output.join(':');
+    }
+    // #endregion
+    // #region Regular expressions
+    /**
+     * Generate a regular expression string that can be used to find or validate
+     * all variations of this address
+     * @memberof Address6
+     * @instance
+     * @param {boolean} substringSearch
+     * @returns {string}
+     */
+    regularExpressionString(substringSearch = false) {
+        let output = [];
+        // TODO: revisit why this is necessary
+        const address6 = new Address6(this.correctForm());
+        if (address6.elidedGroups === 0) {
+            // The simple case
+            output.push((0, regular_expressions_1.simpleRegularExpression)(address6.parsedAddress));
+        }
+        else if (address6.elidedGroups === constants6.GROUPS) {
+            // A completely elided address
+            output.push((0, regular_expressions_1.possibleElisions)(constants6.GROUPS));
+        }
+        else {
+            // A partially elided address
+            const halves = address6.address.split('::');
+            if (halves[0].length) {
+                output.push((0, regular_expressions_1.simpleRegularExpression)(halves[0].split(':')));
+            }
+            assert(typeof address6.elidedGroups === 'number');
+            output.push((0, regular_expressions_1.possibleElisions)(address6.elidedGroups, halves[0].length !== 0, halves[1].length !== 0));
+            if (halves[1].length) {
+                output.push((0, regular_expressions_1.simpleRegularExpression)(halves[1].split(':')));
+            }
+            output = [output.join(':')];
+        }
+        if (!substringSearch) {
+            output = [
+                '(?=^|',
+                regular_expressions_1.ADDRESS_BOUNDARY,
+                '|[^\\w\\:])(',
+                ...output,
+                ')(?=[^\\w\\:]|',
+                regular_expressions_1.ADDRESS_BOUNDARY,
+                '|$)',
+            ];
+        }
+        return output.join('');
+    }
+    /**
+     * Generate a regular expression that can be used to find or validate all
+     * variations of this address.
+     * @memberof Address6
+     * @instance
+     * @param {boolean} substringSearch
+     * @returns {RegExp}
+     */
+    regularExpression(substringSearch = false) {
+        return new RegExp(this.regularExpressionString(substringSearch), 'i');
+    }
+}
+exports.Address6 = Address6;
+//# sourceMappingURL=ipv6.js.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/ipv6.js.map b/mqtt-backend/node_modules/ip-address/dist/ipv6.js.map
new file mode 100644
index 0000000..b1d6a93
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/ipv6.js.map
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v4/constants.d.ts b/mqtt-backend/node_modules/ip-address/dist/v4/constants.d.ts
new file mode 100644
index 0000000..4e85d4a
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v4/constants.d.ts
@@ -0,0 +1,5 @@
+export declare const BITS = 32;
+export declare const GROUPS = 4;
+export declare const RE_ADDRESS: RegExp;
+export declare const RE_SUBNET_STRING: RegExp;
+//# sourceMappingURL=constants.d.ts.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v4/constants.d.ts.map b/mqtt-backend/node_modules/ip-address/dist/v4/constants.d.ts.map
new file mode 100644
index 0000000..ea60ced
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v4/constants.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"constants.d.ts","sourceRoot":"","sources":["../../src/v4/constants.ts"],"names":[],"mappings":"AAAA,eAAO,MAAM,IAAI,KAAK,CAAC;AACvB,eAAO,MAAM,MAAM,IAAI,CAAC;AAExB,eAAO,MAAM,UAAU,QAC8I,CAAC;AAEtK,eAAO,MAAM,gBAAgB,QAAe,CAAC"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v4/constants.js b/mqtt-backend/node_modules/ip-address/dist/v4/constants.js
new file mode 100644
index 0000000..6fa2518
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v4/constants.js
@@ -0,0 +1,8 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.RE_SUBNET_STRING = exports.RE_ADDRESS = exports.GROUPS = exports.BITS = void 0;
+exports.BITS = 32;
+exports.GROUPS = 4;
+exports.RE_ADDRESS = /^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/g;
+exports.RE_SUBNET_STRING = /\/\d{1,2}$/;
+//# sourceMappingURL=constants.js.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v4/constants.js.map b/mqtt-backend/node_modules/ip-address/dist/v4/constants.js.map
new file mode 100644
index 0000000..0a96f86
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v4/constants.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"constants.js","sourceRoot":"","sources":["../../src/v4/constants.ts"],"names":[],"mappings":";;;AAAa,QAAA,IAAI,GAAG,EAAE,CAAC;AACV,QAAA,MAAM,GAAG,CAAC,CAAC;AAEX,QAAA,UAAU,GACrB,mKAAmK,CAAC;AAEzJ,QAAA,gBAAgB,GAAG,YAAY,CAAC"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/constants.d.ts b/mqtt-backend/node_modules/ip-address/dist/v6/constants.d.ts
new file mode 100644
index 0000000..1302375
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/constants.d.ts
@@ -0,0 +1,45 @@
+export declare const BITS = 128;
+export declare const GROUPS = 8;
+/**
+ * Represents IPv6 address scopes
+ * @memberof Address6
+ * @static
+ */
+export declare const SCOPES: {
+    [key: number]: string | undefined;
+};
+/**
+ * Represents IPv6 address types
+ * @memberof Address6
+ * @static
+ */
+export declare const TYPES: {
+    [key: string]: string | undefined;
+};
+/**
+ * A regular expression that matches bad characters in an IPv6 address
+ * @memberof Address6
+ * @static
+ */
+export declare const RE_BAD_CHARACTERS: RegExp;
+/**
+ * A regular expression that matches an incorrect IPv6 address
+ * @memberof Address6
+ * @static
+ */
+export declare const RE_BAD_ADDRESS: RegExp;
+/**
+ * A regular expression that matches an IPv6 subnet
+ * @memberof Address6
+ * @static
+ */
+export declare const RE_SUBNET_STRING: RegExp;
+/**
+ * A regular expression that matches an IPv6 zone
+ * @memberof Address6
+ * @static
+ */
+export declare const RE_ZONE_STRING: RegExp;
+export declare const RE_URL: RegExp;
+export declare const RE_URL_WITH_PORT: RegExp;
+//# sourceMappingURL=constants.d.ts.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/constants.d.ts.map b/mqtt-backend/node_modules/ip-address/dist/v6/constants.d.ts.map
new file mode 100644
index 0000000..0f4f412
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/constants.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"constants.d.ts","sourceRoot":"","sources":["../../src/v6/constants.ts"],"names":[],"mappings":"AAAA,eAAO,MAAM,IAAI,MAAM,CAAC;AACxB,eAAO,MAAM,MAAM,IAAI,CAAC;AAExB;;;;GAIG;AACH,eAAO,MAAM,MAAM,EAAE;IAAE,CAAC,GAAG,EAAE,MAAM,GAAG,MAAM,GAAG,SAAS,CAAA;CAS9C,CAAC;AAEX;;;;GAIG;AACH,eAAO,MAAM,KAAK,EAAE;IAAE,CAAC,GAAG,EAAE,MAAM,GAAG,MAAM,GAAG,SAAS,CAAA;CAuB7C,CAAC;AAEX;;;;GAIG;AACH,eAAO,MAAM,iBAAiB,QAAqB,CAAC;AAEpD;;;;GAIG;AACH,eAAO,MAAM,cAAc,QAA6C,CAAC;AAEzE;;;;GAIG;AACH,eAAO,MAAM,gBAAgB,QAAqB,CAAC;AAEnD;;;;GAIG;AACH,eAAO,MAAM,cAAc,QAAS,CAAC;AAErC,eAAO,MAAM,MAAM,QAAgC,CAAC;AACpD,eAAO,MAAM,gBAAgB,QAAkC,CAAC"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/constants.js b/mqtt-backend/node_modules/ip-address/dist/v6/constants.js
new file mode 100644
index 0000000..0abc423
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/constants.js
@@ -0,0 +1,76 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.RE_URL_WITH_PORT = exports.RE_URL = exports.RE_ZONE_STRING = exports.RE_SUBNET_STRING = exports.RE_BAD_ADDRESS = exports.RE_BAD_CHARACTERS = exports.TYPES = exports.SCOPES = exports.GROUPS = exports.BITS = void 0;
+exports.BITS = 128;
+exports.GROUPS = 8;
+/**
+ * Represents IPv6 address scopes
+ * @memberof Address6
+ * @static
+ */
+exports.SCOPES = {
+    0: 'Reserved',
+    1: 'Interface local',
+    2: 'Link local',
+    4: 'Admin local',
+    5: 'Site local',
+    8: 'Organization local',
+    14: 'Global',
+    15: 'Reserved',
+};
+/**
+ * Represents IPv6 address types
+ * @memberof Address6
+ * @static
+ */
+exports.TYPES = {
+    'ff01::1/128': 'Multicast (All nodes on this interface)',
+    'ff01::2/128': 'Multicast (All routers on this interface)',
+    'ff02::1/128': 'Multicast (All nodes on this link)',
+    'ff02::2/128': 'Multicast (All routers on this link)',
+    'ff05::2/128': 'Multicast (All routers in this site)',
+    'ff02::5/128': 'Multicast (OSPFv3 AllSPF routers)',
+    'ff02::6/128': 'Multicast (OSPFv3 AllDR routers)',
+    'ff02::9/128': 'Multicast (RIP routers)',
+    'ff02::a/128': 'Multicast (EIGRP routers)',
+    'ff02::d/128': 'Multicast (PIM routers)',
+    'ff02::16/128': 'Multicast (MLDv2 reports)',
+    'ff01::fb/128': 'Multicast (mDNSv6)',
+    'ff02::fb/128': 'Multicast (mDNSv6)',
+    'ff05::fb/128': 'Multicast (mDNSv6)',
+    'ff02::1:2/128': 'Multicast (All DHCP servers and relay agents on this link)',
+    'ff05::1:2/128': 'Multicast (All DHCP servers and relay agents in this site)',
+    'ff02::1:3/128': 'Multicast (All DHCP servers on this link)',
+    'ff05::1:3/128': 'Multicast (All DHCP servers in this site)',
+    '::/128': 'Unspecified',
+    '::1/128': 'Loopback',
+    'ff00::/8': 'Multicast',
+    'fe80::/10': 'Link-local unicast',
+};
+/**
+ * A regular expression that matches bad characters in an IPv6 address
+ * @memberof Address6
+ * @static
+ */
+exports.RE_BAD_CHARACTERS = /([^0-9a-f:/%])/gi;
+/**
+ * A regular expression that matches an incorrect IPv6 address
+ * @memberof Address6
+ * @static
+ */
+exports.RE_BAD_ADDRESS = /([0-9a-f]{5,}|:{3,}|[^:]:$|^:[^:]|\/$)/gi;
+/**
+ * A regular expression that matches an IPv6 subnet
+ * @memberof Address6
+ * @static
+ */
+exports.RE_SUBNET_STRING = /\/\d{1,3}(?=%|$)/;
+/**
+ * A regular expression that matches an IPv6 zone
+ * @memberof Address6
+ * @static
+ */
+exports.RE_ZONE_STRING = /%.*$/;
+exports.RE_URL = /^\[{0,1}([0-9a-f:]+)\]{0,1}/;
+exports.RE_URL_WITH_PORT = /\[([0-9a-f:]+)\]:([0-9]{1,5})/;
+//# sourceMappingURL=constants.js.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/constants.js.map b/mqtt-backend/node_modules/ip-address/dist/v6/constants.js.map
new file mode 100644
index 0000000..1d313e0
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/constants.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"constants.js","sourceRoot":"","sources":["../../src/v6/constants.ts"],"names":[],"mappings":";;;AAAa,QAAA,IAAI,GAAG,GAAG,CAAC;AACX,QAAA,MAAM,GAAG,CAAC,CAAC;AAExB;;;;GAIG;AACU,QAAA,MAAM,GAA0C;IAC3D,CAAC,EAAE,UAAU;IACb,CAAC,EAAE,iBAAiB;IACpB,CAAC,EAAE,YAAY;IACf,CAAC,EAAE,aAAa;IAChB,CAAC,EAAE,YAAY;IACf,CAAC,EAAE,oBAAoB;IACvB,EAAE,EAAE,QAAQ;IACZ,EAAE,EAAE,UAAU;CACN,CAAC;AAEX;;;;GAIG;AACU,QAAA,KAAK,GAA0C;IAC1D,aAAa,EAAE,yCAAyC;IACxD,aAAa,EAAE,2CAA2C;IAC1D,aAAa,EAAE,oCAAoC;IACnD,aAAa,EAAE,sCAAsC;IACrD,aAAa,EAAE,sCAAsC;IACrD,aAAa,EAAE,mCAAmC;IAClD,aAAa,EAAE,kCAAkC;IACjD,aAAa,EAAE,yBAAyB;IACxC,aAAa,EAAE,2BAA2B;IAC1C,aAAa,EAAE,yBAAyB;IACxC,cAAc,EAAE,2BAA2B;IAC3C,cAAc,EAAE,oBAAoB;IACpC,cAAc,EAAE,oBAAoB;IACpC,cAAc,EAAE,oBAAoB;IACpC,eAAe,EAAE,4DAA4D;IAC7E,eAAe,EAAE,4DAA4D;IAC7E,eAAe,EAAE,2CAA2C;IAC5D,eAAe,EAAE,2CAA2C;IAC5D,QAAQ,EAAE,aAAa;IACvB,SAAS,EAAE,UAAU;IACrB,UAAU,EAAE,WAAW;IACvB,WAAW,EAAE,oBAAoB;CACzB,CAAC;AAEX;;;;GAIG;AACU,QAAA,iBAAiB,GAAG,kBAAkB,CAAC;AAEpD;;;;GAIG;AACU,QAAA,cAAc,GAAG,0CAA0C,CAAC;AAEzE;;;;GAIG;AACU,QAAA,gBAAgB,GAAG,kBAAkB,CAAC;AAEnD;;;;GAIG;AACU,QAAA,cAAc,GAAG,MAAM,CAAC;AAExB,QAAA,MAAM,GAAG,6BAA6B,CAAC;AACvC,QAAA,gBAAgB,GAAG,+BAA+B,CAAC"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/helpers.d.ts b/mqtt-backend/node_modules/ip-address/dist/v6/helpers.d.ts
new file mode 100644
index 0000000..9bba724
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/helpers.d.ts
@@ -0,0 +1,19 @@
+export declare function escapeHtml(s: string): string;
+/**
+ * @returns {String} the string with all zeroes contained in a <span>
+ */
+export declare function spanAllZeroes(s: string): string;
+/**
+ * @returns {String} the string with each character contained in a <span>
+ */
+export declare function spanAll(s: string, offset?: number): string;
+/**
+ * @returns {String} the string with leading zeroes contained in a <span>
+ */
+export declare function spanLeadingZeroes(address: string): string;
+/**
+ * Groups an address
+ * @returns {String} a grouped address
+ */
+export declare function simpleGroup(addressString: string, offset?: number): string[];
+//# sourceMappingURL=helpers.d.ts.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/helpers.d.ts.map b/mqtt-backend/node_modules/ip-address/dist/v6/helpers.d.ts.map
new file mode 100644
index 0000000..11e7118
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/helpers.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"helpers.d.ts","sourceRoot":"","sources":["../../src/v6/helpers.ts"],"names":[],"mappings":"AAAA,wBAAgB,UAAU,CAAC,CAAC,EAAE,MAAM,GAAG,MAAM,CAO5C;AAED;;GAEG;AACH,wBAAgB,aAAa,CAAC,CAAC,EAAE,MAAM,GAAG,MAAM,CAE/C;AAED;;GAEG;AACH,wBAAgB,OAAO,CAAC,CAAC,EAAE,MAAM,EAAE,MAAM,GAAE,MAAU,GAAG,MAAM,CAS7D;AAMD;;GAEG;AACH,wBAAgB,iBAAiB,CAAC,OAAO,EAAE,MAAM,GAAG,MAAM,CAIzD;AAED;;;GAGG;AACH,wBAAgB,WAAW,CAAC,aAAa,EAAE,MAAM,EAAE,MAAM,GAAE,MAAU,GAAG,MAAM,EAAE,CAU/E"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/helpers.js b/mqtt-backend/node_modules/ip-address/dist/v6/helpers.js
new file mode 100644
index 0000000..e6bae04
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/helpers.js
@@ -0,0 +1,54 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.escapeHtml = escapeHtml;
+exports.spanAllZeroes = spanAllZeroes;
+exports.spanAll = spanAll;
+exports.spanLeadingZeroes = spanLeadingZeroes;
+exports.simpleGroup = simpleGroup;
+function escapeHtml(s) {
+    return s
+        .replace(/&/g, '&amp;')
+        .replace(/</g, '&lt;')
+        .replace(/>/g, '&gt;')
+        .replace(/"/g, '&quot;')
+        .replace(/'/g, '&#39;');
+}
+/**
+ * @returns {String} the string with all zeroes contained in a <span>
+ */
+function spanAllZeroes(s) {
+    return escapeHtml(s).replace(/(0+)/g, '<span class="zero">$1</span>');
+}
+/**
+ * @returns {String} the string with each character contained in a <span>
+ */
+function spanAll(s, offset = 0) {
+    const letters = s.split('');
+    return letters
+        .map((n, i) => `<span class="digit value-${escapeHtml(n)} position-${i + offset}">${spanAllZeroes(n)}</span>`)
+        .join('');
+}
+function spanLeadingZeroesSimple(group) {
+    return escapeHtml(group).replace(/^(0+)/, '<span class="zero">$1</span>');
+}
+/**
+ * @returns {String} the string with leading zeroes contained in a <span>
+ */
+function spanLeadingZeroes(address) {
+    const groups = address.split(':');
+    return groups.map((g) => spanLeadingZeroesSimple(g)).join(':');
+}
+/**
+ * Groups an address
+ * @returns {String} a grouped address
+ */
+function simpleGroup(addressString, offset = 0) {
+    const groups = addressString.split(':');
+    return groups.map((g, i) => {
+        if (/group-v4/.test(g)) {
+            return g;
+        }
+        return `<span class="hover-group group-${i + offset}">${spanLeadingZeroesSimple(g)}</span>`;
+    });
+}
+//# sourceMappingURL=helpers.js.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/helpers.js.map b/mqtt-backend/node_modules/ip-address/dist/v6/helpers.js.map
new file mode 100644
index 0000000..6fe16f8
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/helpers.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"helpers.js","sourceRoot":"","sources":["../../src/v6/helpers.ts"],"names":[],"mappings":";;AAAA,gCAOC;AAKD,sCAEC;AAKD,0BASC;AASD,8CAIC;AAMD,kCAUC;AAzDD,SAAgB,UAAU,CAAC,CAAS;IAClC,OAAO,CAAC;SACL,OAAO,CAAC,IAAI,EAAE,OAAO,CAAC;SACtB,OAAO,CAAC,IAAI,EAAE,MAAM,CAAC;SACrB,OAAO,CAAC,IAAI,EAAE,MAAM,CAAC;SACrB,OAAO,CAAC,IAAI,EAAE,QAAQ,CAAC;SACvB,OAAO,CAAC,IAAI,EAAE,OAAO,CAAC,CAAC;AAC5B,CAAC;AAED;;GAEG;AACH,SAAgB,aAAa,CAAC,CAAS;IACrC,OAAO,UAAU,CAAC,CAAC,CAAC,CAAC,OAAO,CAAC,OAAO,EAAE,8BAA8B,CAAC,CAAC;AACxE,CAAC;AAED;;GAEG;AACH,SAAgB,OAAO,CAAC,CAAS,EAAE,SAAiB,CAAC;IACnD,MAAM,OAAO,GAAG,CAAC,CAAC,KAAK,CAAC,EAAE,CAAC,CAAC;IAE5B,OAAO,OAAO;SACX,GAAG,CACF,CAAC,CAAC,EAAE,CAAC,EAAE,EAAE,CACP,4BAA4B,UAAU,CAAC,CAAC,CAAC,aAAa,CAAC,GAAG,MAAM,KAAK,aAAa,CAAC,CAAC,CAAC,SAAS,CACjG;SACA,IAAI,CAAC,EAAE,CAAC,CAAC;AACd,CAAC;AAED,SAAS,uBAAuB,CAAC,KAAa;IAC5C,OAAO,UAAU,CAAC,KAAK,CAAC,CAAC,OAAO,CAAC,OAAO,EAAE,8BAA8B,CAAC,CAAC;AAC5E,CAAC;AAED;;GAEG;AACH,SAAgB,iBAAiB,CAAC,OAAe;IAC/C,MAAM,MAAM,GAAG,OAAO,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC;IAElC,OAAO,MAAM,CAAC,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,uBAAuB,CAAC,CAAC,CAAC,CAAC,CAAC,IAAI,CAAC,GAAG,CAAC,CAAC;AACjE,CAAC;AAED;;;GAGG;AACH,SAAgB,WAAW,CAAC,aAAqB,EAAE,SAAiB,CAAC;IACnE,MAAM,MAAM,GAAG,aAAa,CAAC,KAAK,CAAC,GAAG,CAAC,CAAC;IAExC,OAAO,MAAM,CAAC,GAAG,CAAC,CAAC,CAAC,EAAE,CAAC,EAAE,EAAE;QACzB,IAAI,UAAU,CAAC,IAAI,CAAC,CAAC,CAAC,EAAE,CAAC;YACvB,OAAO,CAAC,CAAC;QACX,CAAC;QAED,OAAO,kCAAkC,CAAC,GAAG,MAAM,KAAK,uBAAuB,CAAC,CAAC,CAAC,SAAS,CAAC;IAC9F,CAAC,CAAC,CAAC;AACL,CAAC"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.d.ts b/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.d.ts
new file mode 100644
index 0000000..181b91e
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.d.ts
@@ -0,0 +1,6 @@
+export declare function groupPossibilities(possibilities: string[]): string;
+export declare function padGroup(group: string): string;
+export declare const ADDRESS_BOUNDARY = "[^A-Fa-f0-9:]";
+export declare function simpleRegularExpression(groups: string[]): string;
+export declare function possibleElisions(elidedGroups: number, moreLeft?: boolean, moreRight?: boolean): string;
+//# sourceMappingURL=regular-expressions.d.ts.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.d.ts.map b/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.d.ts.map
new file mode 100644
index 0000000..20a93f7
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.d.ts.map
@@ -0,0 +1 @@
+{"version":3,"file":"regular-expressions.d.ts","sourceRoot":"","sources":["../../src/v6/regular-expressions.ts"],"names":[],"mappings":"AAEA,wBAAgB,kBAAkB,CAAC,aAAa,EAAE,MAAM,EAAE,GAAG,MAAM,CAElE;AAED,wBAAgB,QAAQ,CAAC,KAAK,EAAE,MAAM,GAAG,MAAM,CAM9C;AAED,eAAO,MAAM,gBAAgB,kBAAkB,CAAC;AAEhD,wBAAgB,uBAAuB,CAAC,MAAM,EAAE,MAAM,EAAE,UA+BvD;AAED,wBAAgB,gBAAgB,CAC9B,YAAY,EAAE,MAAM,EACpB,QAAQ,CAAC,EAAE,OAAO,EAClB,SAAS,CAAC,EAAE,OAAO,GAClB,MAAM,CAwCR"}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.js b/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.js
new file mode 100644
index 0000000..a2c5145
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.js
@@ -0,0 +1,95 @@
+"use strict";
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
+var __importStar = (this && this.__importStar) || function (mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
+    return result;
+};
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.ADDRESS_BOUNDARY = void 0;
+exports.groupPossibilities = groupPossibilities;
+exports.padGroup = padGroup;
+exports.simpleRegularExpression = simpleRegularExpression;
+exports.possibleElisions = possibleElisions;
+const v6 = __importStar(require("./constants"));
+function groupPossibilities(possibilities) {
+    return `(${possibilities.join('|')})`;
+}
+function padGroup(group) {
+    if (group.length < 4) {
+        return `0{0,${4 - group.length}}${group}`;
+    }
+    return group;
+}
+exports.ADDRESS_BOUNDARY = '[^A-Fa-f0-9:]';
+function simpleRegularExpression(groups) {
+    const zeroIndexes = [];
+    groups.forEach((group, i) => {
+        const groupInteger = parseInt(group, 16);
+        if (groupInteger === 0) {
+            zeroIndexes.push(i);
+        }
+    });
+    // You can technically elide a single 0, this creates the regular expressions
+    // to match that eventuality
+    const possibilities = zeroIndexes.map((zeroIndex) => groups
+        .map((group, i) => {
+        if (i === zeroIndex) {
+            const elision = i === 0 || i === v6.GROUPS - 1 ? ':' : '';
+            return groupPossibilities([padGroup(group), elision]);
+        }
+        return padGroup(group);
+    })
+        .join(':'));
+    // The simplest case
+    possibilities.push(groups.map(padGroup).join(':'));
+    return groupPossibilities(possibilities);
+}
+function possibleElisions(elidedGroups, moreLeft, moreRight) {
+    const left = moreLeft ? '' : ':';
+    const right = moreRight ? '' : ':';
+    const possibilities = [];
+    // 1. elision of everything (::)
+    if (!moreLeft && !moreRight) {
+        possibilities.push('::');
+    }
+    // 2. complete elision of the middle
+    if (moreLeft && moreRight) {
+        possibilities.push('');
+    }
+    if ((moreRight && !moreLeft) || (!moreRight && moreLeft)) {
+        // 3. complete elision of one side
+        possibilities.push(':');
+    }
+    // 4. elision from the left side
+    possibilities.push(`${left}(:0{1,4}){1,${elidedGroups - 1}}`);
+    // 5. elision from the right side
+    possibilities.push(`(0{1,4}:){1,${elidedGroups - 1}}${right}`);
+    // 6. no elision
+    possibilities.push(`(0{1,4}:){${elidedGroups - 1}}0{1,4}`);
+    // 7. elision (including sloppy elision) from the middle
+    for (let groups = 1; groups < elidedGroups - 1; groups++) {
+        for (let position = 1; position < elidedGroups - groups; position++) {
+            possibilities.push(`(0{1,4}:){${position}}:(0{1,4}:){${elidedGroups - position - groups - 1}}0{1,4}`);
+        }
+    }
+    return groupPossibilities(possibilities);
+}
+//# sourceMappingURL=regular-expressions.js.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.js.map b/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.js.map
new file mode 100644
index 0000000..190fd4a
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/dist/v6/regular-expressions.js.map
@@ -0,0 +1 @@
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diff --git a/mqtt-backend/node_modules/ip-address/package.json b/mqtt-backend/node_modules/ip-address/package.json
new file mode 100644
index 0000000..8f72f6d
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/package.json
@@ -0,0 +1,76 @@
+{
+  "name": "ip-address",
+  "description": "A library for parsing IPv4 and IPv6 IP addresses in node and the browser.",
+  "keywords": [
+    "ipv6",
+    "ipv4",
+    "browser",
+    "validation"
+  ],
+  "version": "10.1.1",
+  "author": "Beau Gunderson <beau@beaugunderson.com> (https://beaugunderson.com/)",
+  "license": "MIT",
+  "main": "dist/ip-address.js",
+  "types": "dist/ip-address.d.ts",
+  "scripts": {
+    "docs": "documentation build --github --output docs --format html ./ip-address.js",
+    "build": "rm -rf dist; mkdir dist; tsc",
+    "prepack": "npm run build",
+    "release": "release-it",
+    "test-ci": "c8 --experimental-monocart mocha",
+    "test": "mocha",
+    "watch": "mocha --watch"
+  },
+  "c8": {
+    "include": [
+      "src/**/*.ts"
+    ],
+    "exclude": [
+      "**/*.d.ts",
+      "src/ip-address.ts",
+      "src/v4/constants.ts",
+      "src/v6/constants.ts"
+    ],
+    "reporter": [
+      "html",
+      "lcov",
+      "text"
+    ]
+  },
+  "engines": {
+    "node": ">= 12"
+  },
+  "files": [
+    "src",
+    "dist"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/beaugunderson/ip-address.git"
+  },
+  "devDependencies": {
+    "@types/chai": "^5.0.0",
+    "@types/mocha": "^10.0.8",
+    "@typescript-eslint/eslint-plugin": "^8.8.0",
+    "@typescript-eslint/parser": "^8.8.0",
+    "c8": "^11.0.0",
+    "chai": "^5.1.1",
+    "documentation": "^14.0.3",
+    "eslint": "^8.50.0",
+    "eslint_d": "^14.0.4",
+    "eslint-config-airbnb": "^19.0.4",
+    "eslint-config-prettier": "^9.1.0",
+    "eslint-plugin-filenames": "^1.3.2",
+    "eslint-plugin-import": "^2.30.0",
+    "eslint-plugin-jsx-a11y": "^6.10.0",
+    "eslint-plugin-prettier": "^5.2.1",
+    "eslint-plugin-sort-imports-es6-autofix": "^0.6.0",
+    "mocha": "^10.7.3",
+    "monocart-coverage-reports": "^2.12.9",
+    "prettier": "^3.3.3",
+    "release-it": "^17.6.0",
+    "source-map-support": "^0.5.21",
+    "tsx": "^4.19.1",
+    "typescript": "<5.6.0"
+  }
+}
diff --git a/mqtt-backend/node_modules/ip-address/src/address-error.ts b/mqtt-backend/node_modules/ip-address/src/address-error.ts
new file mode 100644
index 0000000..032d4cd
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/src/address-error.ts
@@ -0,0 +1,11 @@
+export class AddressError extends Error {
+  parseMessage?: string;
+
+  constructor(message: string, parseMessage?: string) {
+    super(message);
+
+    this.name = 'AddressError';
+
+    this.parseMessage = parseMessage;
+  }
+}
diff --git a/mqtt-backend/node_modules/ip-address/src/common.ts b/mqtt-backend/node_modules/ip-address/src/common.ts
new file mode 100644
index 0000000..1123fa3
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/src/common.ts
@@ -0,0 +1,55 @@
+import { Address4 } from './ipv4';
+import { Address6 } from './ipv6';
+
+export interface ReverseFormOptions {
+  omitSuffix?: boolean;
+}
+
+export function isInSubnet(this: Address4 | Address6, address: Address4 | Address6) {
+  if (this.subnetMask < address.subnetMask) {
+    return false;
+  }
+
+  if (this.mask(address.subnetMask) === address.mask()) {
+    return true;
+  }
+
+  return false;
+}
+
+export function isCorrect(defaultBits: number) {
+  return function (this: Address4 | Address6) {
+    if (this.addressMinusSuffix !== this.correctForm()) {
+      return false;
+    }
+
+    if (this.subnetMask === defaultBits && !this.parsedSubnet) {
+      return true;
+    }
+
+    return this.parsedSubnet === String(this.subnetMask);
+  };
+}
+
+export function numberToPaddedHex(number: number) {
+  return number.toString(16).padStart(2, '0');
+}
+
+export function stringToPaddedHex(numberString: string) {
+  return numberToPaddedHex(parseInt(numberString, 10));
+}
+
+/**
+ * @param binaryValue Binary representation of a value (e.g. `10`)
+ * @param position Byte position, where 0 is the least significant bit
+ */
+export function testBit(binaryValue: string, position: number): boolean {
+  const { length } = binaryValue;
+
+  if (position > length) {
+    return false;
+  }
+
+  const positionInString = length - position;
+  return binaryValue.substring(positionInString, positionInString + 1) === '1';
+}
diff --git a/mqtt-backend/node_modules/ip-address/src/ip-address.ts b/mqtt-backend/node_modules/ip-address/src/ip-address.ts
new file mode 100644
index 0000000..b4e1502
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/src/ip-address.ts
@@ -0,0 +1,7 @@
+export { Address4 } from './ipv4';
+export { Address6 } from './ipv6';
+export { AddressError } from './address-error';
+
+import * as helpers from './v6/helpers';
+
+export const v6 = { helpers };
diff --git a/mqtt-backend/node_modules/ip-address/src/ipv4.ts b/mqtt-backend/node_modules/ip-address/src/ipv4.ts
new file mode 100644
index 0000000..7c7ce30
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/src/ipv4.ts
@@ -0,0 +1,394 @@
+/* eslint-disable no-param-reassign */
+
+import * as common from './common';
+import * as constants from './v4/constants';
+import { AddressError } from './address-error';
+
+/**
+ * Represents an IPv4 address
+ * @class Address4
+ * @param {string} address - An IPv4 address string
+ */
+export class Address4 {
+  address: string;
+  addressMinusSuffix?: string;
+  groups: number = constants.GROUPS;
+  parsedAddress: string[] = [];
+  parsedSubnet: string = '';
+  subnet: string = '/32';
+  subnetMask: number = 32;
+  v4: boolean = true;
+
+  constructor(address: string) {
+    this.address = address;
+
+    const subnet = constants.RE_SUBNET_STRING.exec(address);
+
+    if (subnet) {
+      this.parsedSubnet = subnet[0].replace('/', '');
+      this.subnetMask = parseInt(this.parsedSubnet, 10);
+      this.subnet = `/${this.subnetMask}`;
+
+      if (this.subnetMask < 0 || this.subnetMask > constants.BITS) {
+        throw new AddressError('Invalid subnet mask.');
+      }
+
+      address = address.replace(constants.RE_SUBNET_STRING, '');
+    }
+
+    this.addressMinusSuffix = address;
+
+    this.parsedAddress = this.parse(address);
+  }
+
+  static isValid(address: string): boolean {
+    try {
+      // eslint-disable-next-line no-new
+      new Address4(address);
+
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
+  /*
+   * Parses a v4 address
+   */
+  parse(address: string) {
+    const groups = address.split('.');
+
+    if (!address.match(constants.RE_ADDRESS)) {
+      throw new AddressError('Invalid IPv4 address.');
+    }
+
+    return groups;
+  }
+
+  /**
+   * Returns the correct form of an address
+   * @memberof Address4
+   * @instance
+   * @returns {String}
+   */
+  correctForm(): string {
+    return this.parsedAddress.map((part) => parseInt(part, 10)).join('.');
+  }
+
+  /**
+   * Returns true if the address is correct, false otherwise
+   * @memberof Address4
+   * @instance
+   * @returns {Boolean}
+   */
+  isCorrect = common.isCorrect(constants.BITS);
+
+  /**
+   * Converts a hex string to an IPv4 address object
+   * @memberof Address4
+   * @static
+   * @param {string} hex - a hex string to convert
+   * @returns {Address4}
+   */
+  static fromHex(hex: string): Address4 {
+    const padded = hex.replace(/:/g, '').padStart(8, '0');
+    const groups = [];
+    let i;
+
+    for (i = 0; i < 8; i += 2) {
+      const h = padded.slice(i, i + 2);
+
+      groups.push(parseInt(h, 16));
+    }
+
+    return new Address4(groups.join('.'));
+  }
+
+  /**
+   * Converts an integer into a IPv4 address object
+   * @memberof Address4
+   * @static
+   * @param {integer} integer - a number to convert
+   * @returns {Address4}
+   */
+  static fromInteger(integer: number): Address4 {
+    return Address4.fromHex(integer.toString(16));
+  }
+
+  /**
+   * Return an address from in-addr.arpa form
+   * @memberof Address4
+   * @static
+   * @param {string} arpaFormAddress - an 'in-addr.arpa' form ipv4 address
+   * @returns {Adress4}
+   * @example
+   * var address = Address4.fromArpa(42.2.0.192.in-addr.arpa.)
+   * address.correctForm(); // '192.0.2.42'
+   */
+  static fromArpa(arpaFormAddress: string): Address4 {
+    // remove ending ".in-addr.arpa." or just "."
+    const leader = arpaFormAddress.replace(/(\.in-addr\.arpa)?\.$/, '');
+
+    const address = leader.split('.').reverse().join('.');
+
+    return new Address4(address);
+  }
+
+  /**
+   * Converts an IPv4 address object to a hex string
+   * @memberof Address4
+   * @instance
+   * @returns {String}
+   */
+  toHex(): string {
+    return this.parsedAddress.map((part) => common.stringToPaddedHex(part)).join(':');
+  }
+
+  /**
+   * Converts an IPv4 address object to an array of bytes
+   * @memberof Address4
+   * @instance
+   * @returns {Array}
+   */
+  toArray(): number[] {
+    return this.parsedAddress.map((part) => parseInt(part, 10));
+  }
+
+  /**
+   * Converts an IPv4 address object to an IPv6 address group
+   * @memberof Address4
+   * @instance
+   * @returns {String}
+   */
+  toGroup6(): string {
+    const output = [];
+    let i;
+
+    for (i = 0; i < constants.GROUPS; i += 2) {
+      output.push(
+        `${common.stringToPaddedHex(this.parsedAddress[i])}${common.stringToPaddedHex(
+          this.parsedAddress[i + 1],
+        )}`,
+      );
+    }
+
+    return output.join(':');
+  }
+
+  /**
+   * Returns the address as a `bigint`
+   * @memberof Address4
+   * @instance
+   * @returns {bigint}
+   */
+  bigInt(): bigint {
+    return BigInt(`0x${this.parsedAddress.map((n) => common.stringToPaddedHex(n)).join('')}`);
+  }
+
+  /**
+   * Helper function getting start address.
+   * @memberof Address4
+   * @instance
+   * @returns {bigint}
+   */
+  _startAddress(): bigint {
+    return BigInt(`0b${this.mask() + '0'.repeat(constants.BITS - this.subnetMask)}`);
+  }
+
+  /**
+   * The first address in the range given by this address' subnet.
+   * Often referred to as the Network Address.
+   * @memberof Address4
+   * @instance
+   * @returns {Address4}
+   */
+  startAddress(): Address4 {
+    return Address4.fromBigInt(this._startAddress());
+  }
+
+  /**
+   * The first host address in the range given by this address's subnet ie
+   * the first address after the Network Address
+   * @memberof Address4
+   * @instance
+   * @returns {Address4}
+   */
+  startAddressExclusive(): Address4 {
+    const adjust = BigInt('1');
+    return Address4.fromBigInt(this._startAddress() + adjust);
+  }
+
+  /**
+   * Helper function getting end address.
+   * @memberof Address4
+   * @instance
+   * @returns {bigint}
+   */
+  _endAddress(): bigint {
+    return BigInt(`0b${this.mask() + '1'.repeat(constants.BITS - this.subnetMask)}`);
+  }
+
+  /**
+   * The last address in the range given by this address' subnet
+   * Often referred to as the Broadcast
+   * @memberof Address4
+   * @instance
+   * @returns {Address4}
+   */
+  endAddress(): Address4 {
+    return Address4.fromBigInt(this._endAddress());
+  }
+
+  /**
+   * The last host address in the range given by this address's subnet ie
+   * the last address prior to the Broadcast Address
+   * @memberof Address4
+   * @instance
+   * @returns {Address4}
+   */
+  endAddressExclusive(): Address4 {
+    const adjust = BigInt('1');
+    return Address4.fromBigInt(this._endAddress() - adjust);
+  }
+
+  /**
+   * Converts a BigInt to a v4 address object
+   * @memberof Address4
+   * @static
+   * @param {bigint} bigInt - a BigInt to convert
+   * @returns {Address4}
+   */
+  static fromBigInt(bigInt: bigint): Address4 {
+    return Address4.fromHex(bigInt.toString(16));
+  }
+
+  /**
+   * Convert a byte array to an Address4 object
+   * @memberof Address4
+   * @static
+   * @param {Array<number>} bytes - an array of 4 bytes (0-255)
+   * @returns {Address4}
+   */
+  static fromByteArray(bytes: Array<number>): Address4 {
+    if (bytes.length !== 4) {
+      throw new AddressError('IPv4 addresses require exactly 4 bytes');
+    }
+
+    // Validate that all bytes are within valid range (0-255)
+    for (let i = 0; i < bytes.length; i++) {
+      if (!Number.isInteger(bytes[i]) || bytes[i] < 0 || bytes[i] > 255) {
+        throw new AddressError('All bytes must be integers between 0 and 255');
+      }
+    }
+
+    return this.fromUnsignedByteArray(bytes);
+  }
+
+  /**
+   * Convert an unsigned byte array to an Address4 object
+   * @memberof Address4
+   * @static
+   * @param {Array<number>} bytes - an array of 4 unsigned bytes (0-255)
+   * @returns {Address4}
+   */
+  static fromUnsignedByteArray(bytes: Array<number>): Address4 {
+    if (bytes.length !== 4) {
+      throw new AddressError('IPv4 addresses require exactly 4 bytes');
+    }
+
+    const address = bytes.join('.');
+    return new Address4(address);
+  }
+
+  /**
+   * Returns the first n bits of the address, defaulting to the
+   * subnet mask
+   * @memberof Address4
+   * @instance
+   * @returns {String}
+   */
+  mask(mask?: number): string {
+    if (mask === undefined) {
+      mask = this.subnetMask;
+    }
+
+    return this.getBitsBase2(0, mask);
+  }
+
+  /**
+   * Returns the bits in the given range as a base-2 string
+   * @memberof Address4
+   * @instance
+   * @returns {string}
+   */
+  getBitsBase2(start: number, end: number): string {
+    return this.binaryZeroPad().slice(start, end);
+  }
+
+  /**
+   * Return the reversed ip6.arpa form of the address
+   * @memberof Address4
+   * @param {Object} options
+   * @param {boolean} options.omitSuffix - omit the "in-addr.arpa" suffix
+   * @instance
+   * @returns {String}
+   */
+  reverseForm(options?: common.ReverseFormOptions): string {
+    if (!options) {
+      options = {};
+    }
+
+    const reversed = this.correctForm().split('.').reverse().join('.');
+
+    if (options.omitSuffix) {
+      return reversed;
+    }
+
+    return `${reversed}.in-addr.arpa.`;
+  }
+
+  /**
+   * Returns true if the given address is in the subnet of the current address
+   * @memberof Address4
+   * @instance
+   * @returns {boolean}
+   */
+  isInSubnet = common.isInSubnet;
+
+  /**
+   * Returns true if the given address is a multicast address
+   * @memberof Address4
+   * @instance
+   * @returns {boolean}
+   */
+  isMulticast(): boolean {
+    return this.isInSubnet(new Address4('224.0.0.0/4'));
+  }
+
+  /**
+   * Returns a zero-padded base-2 string representation of the address
+   * @memberof Address4
+   * @instance
+   * @returns {string}
+   */
+  binaryZeroPad(): string {
+    return this.bigInt().toString(2).padStart(constants.BITS, '0');
+  }
+
+  /**
+   * Groups an IPv4 address for inclusion at the end of an IPv6 address
+   * @returns {String}
+   */
+  groupForV6(): string {
+    const segments = this.parsedAddress;
+
+    return this.address.replace(
+      constants.RE_ADDRESS,
+      `<span class="hover-group group-v4 group-6">${segments
+        .slice(0, 2)
+        .join('.')}</span>.<span class="hover-group group-v4 group-7">${segments
+        .slice(2, 4)
+        .join('.')}</span>`,
+    );
+  }
+}
diff --git a/mqtt-backend/node_modules/ip-address/src/ipv6.ts b/mqtt-backend/node_modules/ip-address/src/ipv6.ts
new file mode 100644
index 0000000..c88bfff
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/src/ipv6.ts
@@ -0,0 +1,1219 @@
+/* eslint-disable prefer-destructuring */
+/* eslint-disable no-param-reassign */
+
+import * as common from './common';
+import * as constants4 from './v4/constants';
+import * as constants6 from './v6/constants';
+import * as helpers from './v6/helpers';
+import { Address4 } from './ipv4';
+import {
+  ADDRESS_BOUNDARY,
+  possibleElisions,
+  simpleRegularExpression,
+} from './v6/regular-expressions';
+import { AddressError } from './address-error';
+import { testBit } from './common';
+
+function assert(condition: any): asserts condition {
+  if (!condition) {
+    throw new Error('Assertion failed.');
+  }
+}
+
+function addCommas(number: string): string {
+  const r = /(\d+)(\d{3})/;
+
+  while (r.test(number)) {
+    number = number.replace(r, '$1,$2');
+  }
+
+  return number;
+}
+
+function spanLeadingZeroes4(n: string): string {
+  n = n.replace(/^(0{1,})([1-9]+)$/, '<span class="parse-error">$1</span>$2');
+  n = n.replace(/^(0{1,})(0)$/, '<span class="parse-error">$1</span>$2');
+
+  return n;
+}
+
+/*
+ * A helper function to compact an array
+ */
+function compact(address: string[], slice: number[]) {
+  const s1 = [];
+  const s2 = [];
+  let i;
+
+  for (i = 0; i < address.length; i++) {
+    if (i < slice[0]) {
+      s1.push(address[i]);
+    } else if (i > slice[1]) {
+      s2.push(address[i]);
+    }
+  }
+
+  return s1.concat(['compact']).concat(s2);
+}
+
+function paddedHex(octet: string): string {
+  return parseInt(octet, 16).toString(16).padStart(4, '0');
+}
+
+function unsignByte(b: number) {
+  // eslint-disable-next-line no-bitwise
+  return b & 0xff;
+}
+
+interface SixToFourProperties {
+  prefix: string;
+  gateway: string;
+}
+
+interface TeredoProperties {
+  prefix: string;
+  server4: string;
+  client4: string;
+  flags: string;
+  coneNat: boolean;
+  microsoft: {
+    reserved: boolean;
+    universalLocal: boolean;
+    groupIndividual: boolean;
+    nonce: string;
+  };
+  udpPort: string;
+}
+
+/**
+ * Represents an IPv6 address
+ * @class Address6
+ * @param {string} address - An IPv6 address string
+ * @param {number} [groups=8] - How many octets to parse
+ * @example
+ * var address = new Address6('2001::/32');
+ */
+export class Address6 {
+  address4?: Address4;
+  address: string;
+  addressMinusSuffix: string = '';
+  elidedGroups?: number;
+  elisionBegin?: number;
+  elisionEnd?: number;
+  groups: number;
+  parsedAddress4?: string;
+  parsedAddress: string[];
+  parsedSubnet: string = '';
+  subnet: string = '/128';
+  subnetMask: number = 128;
+  v4: boolean = false;
+  zone: string = '';
+
+  constructor(address: string, optionalGroups?: number) {
+    if (optionalGroups === undefined) {
+      this.groups = constants6.GROUPS;
+    } else {
+      this.groups = optionalGroups;
+    }
+
+    this.address = address;
+
+    const subnet = constants6.RE_SUBNET_STRING.exec(address);
+
+    if (subnet) {
+      this.parsedSubnet = subnet[0].replace('/', '');
+      this.subnetMask = parseInt(this.parsedSubnet, 10);
+      this.subnet = `/${this.subnetMask}`;
+
+      if (
+        Number.isNaN(this.subnetMask) ||
+        this.subnetMask < 0 ||
+        this.subnetMask > constants6.BITS
+      ) {
+        throw new AddressError('Invalid subnet mask.');
+      }
+
+      address = address.replace(constants6.RE_SUBNET_STRING, '');
+    } else if (/\//.test(address)) {
+      throw new AddressError('Invalid subnet mask.');
+    }
+
+    const zone = constants6.RE_ZONE_STRING.exec(address);
+
+    if (zone) {
+      this.zone = zone[0];
+
+      address = address.replace(constants6.RE_ZONE_STRING, '');
+    }
+
+    this.addressMinusSuffix = address;
+
+    this.parsedAddress = this.parse(this.addressMinusSuffix);
+  }
+
+  static isValid(address: string): boolean {
+    try {
+      // eslint-disable-next-line no-new
+      new Address6(address);
+
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
+  /**
+   * Convert a BigInt to a v6 address object
+   * @memberof Address6
+   * @static
+   * @param {bigint} bigInt - a BigInt to convert
+   * @returns {Address6}
+   * @example
+   * var bigInt = BigInt('1000000000000');
+   * var address = Address6.fromBigInt(bigInt);
+   * address.correctForm(); // '::e8:d4a5:1000'
+   */
+  static fromBigInt(bigInt: bigint): Address6 {
+    const hex = bigInt.toString(16).padStart(32, '0');
+    const groups = [];
+    let i;
+
+    for (i = 0; i < constants6.GROUPS; i++) {
+      groups.push(hex.slice(i * 4, (i + 1) * 4));
+    }
+
+    return new Address6(groups.join(':'));
+  }
+
+  /**
+   * Convert a URL (with optional port number) to an address object
+   * @memberof Address6
+   * @static
+   * @param {string} url - a URL with optional port number
+   * @example
+   * var addressAndPort = Address6.fromURL('http://[ffff::]:8080/foo/');
+   * addressAndPort.address.correctForm(); // 'ffff::'
+   * addressAndPort.port; // 8080
+   */
+  static fromURL(url: string) {
+    let host: string;
+    let port: string | number | null = null;
+    let result: string[] | null;
+
+    // If we have brackets parse them and find a port
+    if (url.indexOf('[') !== -1 && url.indexOf(']:') !== -1) {
+      result = constants6.RE_URL_WITH_PORT.exec(url);
+
+      if (result === null) {
+        return {
+          error: 'failed to parse address with port',
+          address: null,
+          port: null,
+        };
+      }
+
+      host = result[1];
+      port = result[2];
+      // If there's a URL extract the address
+    } else if (url.indexOf('/') !== -1) {
+      // Remove the protocol prefix
+      url = url.replace(/^[a-z0-9]+:\/\//, '');
+
+      // Parse the address
+      result = constants6.RE_URL.exec(url);
+
+      if (result === null) {
+        return {
+          error: 'failed to parse address from URL',
+          address: null,
+          port: null,
+        };
+      }
+
+      host = result[1];
+      // Otherwise just assign the URL to the host and let the library parse it
+    } else {
+      host = url;
+    }
+
+    // If there's a port convert it to an integer
+    if (port) {
+      port = parseInt(port, 10);
+
+      // squelch out of range ports
+      if (port < 0 || port > 65536) {
+        port = null;
+      }
+    } else {
+      // Standardize `undefined` to `null`
+      port = null;
+    }
+
+    return {
+      address: new Address6(host),
+      port,
+    };
+  }
+
+  /**
+   * Create an IPv6-mapped address given an IPv4 address
+   * @memberof Address6
+   * @static
+   * @param {string} address - An IPv4 address string
+   * @returns {Address6}
+   * @example
+   * var address = Address6.fromAddress4('192.168.0.1');
+   * address.correctForm(); // '::ffff:c0a8:1'
+   * address.to4in6(); // '::ffff:192.168.0.1'
+   */
+  static fromAddress4(address: string): Address6 {
+    const address4 = new Address4(address);
+
+    const mask6 = constants6.BITS - (constants4.BITS - address4.subnetMask);
+
+    return new Address6(`::ffff:${address4.correctForm()}/${mask6}`);
+  }
+
+  /**
+   * Return an address from ip6.arpa form
+   * @memberof Address6
+   * @static
+   * @param {string} arpaFormAddress - an 'ip6.arpa' form address
+   * @returns {Adress6}
+   * @example
+   * var address = Address6.fromArpa(e.f.f.f.3.c.2.6.f.f.f.e.6.6.8.e.1.0.6.7.9.4.e.c.0.0.0.0.1.0.0.2.ip6.arpa.)
+   * address.correctForm(); // '2001:0:ce49:7601:e866:efff:62c3:fffe'
+   */
+  static fromArpa(arpaFormAddress: string): Address6 {
+    // remove ending ".ip6.arpa." or just "."
+    let address = arpaFormAddress.replace(/(\.ip6\.arpa)?\.$/, '');
+    const semicolonAmount = 7;
+
+    // correct ip6.arpa form with ending removed will be 63 characters
+    if (address.length !== 63) {
+      throw new AddressError("Invalid 'ip6.arpa' form.");
+    }
+
+    const parts = address.split('.').reverse();
+
+    for (let i = semicolonAmount; i > 0; i--) {
+      const insertIndex = i * 4;
+      parts.splice(insertIndex, 0, ':');
+    }
+
+    address = parts.join('');
+
+    return new Address6(address);
+  }
+
+  /**
+   * Return the Microsoft UNC transcription of the address
+   * @memberof Address6
+   * @instance
+   * @returns {String} the Microsoft UNC transcription of the address
+   */
+  microsoftTranscription(): string {
+    return `${this.correctForm().replace(/:/g, '-')}.ipv6-literal.net`;
+  }
+
+  /**
+   * Return the first n bits of the address, defaulting to the subnet mask
+   * @memberof Address6
+   * @instance
+   * @param {number} [mask=subnet] - the number of bits to mask
+   * @returns {String} the first n bits of the address as a string
+   */
+  mask(mask: number = this.subnetMask): string {
+    return this.getBitsBase2(0, mask);
+  }
+
+  /**
+   * Return the number of possible subnets of a given size in the address
+   * @memberof Address6
+   * @instance
+   * @param {number} [subnetSize=128] - the subnet size
+   * @returns {String}
+   */
+  // TODO: probably useful to have a numeric version of this too
+  possibleSubnets(subnetSize: number = 128): string {
+    const availableBits = constants6.BITS - this.subnetMask;
+    const subnetBits = Math.abs(subnetSize - constants6.BITS);
+    const subnetPowers = availableBits - subnetBits;
+
+    if (subnetPowers < 0) {
+      return '0';
+    }
+
+    return addCommas((BigInt('2') ** BigInt(subnetPowers)).toString(10));
+  }
+
+  /**
+   * Helper function getting start address.
+   * @memberof Address6
+   * @instance
+   * @returns {bigint}
+   */
+  _startAddress(): bigint {
+    return BigInt(`0b${this.mask() + '0'.repeat(constants6.BITS - this.subnetMask)}`);
+  }
+
+  /**
+   * The first address in the range given by this address' subnet
+   * Often referred to as the Network Address.
+   * @memberof Address6
+   * @instance
+   * @returns {Address6}
+   */
+  startAddress(): Address6 {
+    return Address6.fromBigInt(this._startAddress());
+  }
+
+  /**
+   * The first host address in the range given by this address's subnet ie
+   * the first address after the Network Address
+   * @memberof Address6
+   * @instance
+   * @returns {Address6}
+   */
+  startAddressExclusive(): Address6 {
+    const adjust = BigInt('1');
+    return Address6.fromBigInt(this._startAddress() + adjust);
+  }
+
+  /**
+   * Helper function getting end address.
+   * @memberof Address6
+   * @instance
+   * @returns {bigint}
+   */
+  _endAddress(): bigint {
+    return BigInt(`0b${this.mask() + '1'.repeat(constants6.BITS - this.subnetMask)}`);
+  }
+
+  /**
+   * The last address in the range given by this address' subnet
+   * Often referred to as the Broadcast
+   * @memberof Address6
+   * @instance
+   * @returns {Address6}
+   */
+  endAddress(): Address6 {
+    return Address6.fromBigInt(this._endAddress());
+  }
+
+  /**
+   * The last host address in the range given by this address's subnet ie
+   * the last address prior to the Broadcast Address
+   * @memberof Address6
+   * @instance
+   * @returns {Address6}
+   */
+  endAddressExclusive(): Address6 {
+    const adjust = BigInt('1');
+    return Address6.fromBigInt(this._endAddress() - adjust);
+  }
+
+  /**
+   * Return the scope of the address
+   * @memberof Address6
+   * @instance
+   * @returns {String}
+   */
+  getScope(): string {
+    let scope = constants6.SCOPES[parseInt(this.getBits(12, 16).toString(10), 10)];
+
+    if (this.getType() === 'Global unicast' && scope !== 'Link local') {
+      scope = 'Global';
+    }
+
+    return scope || 'Unknown';
+  }
+
+  /**
+   * Return the type of the address
+   * @memberof Address6
+   * @instance
+   * @returns {String}
+   */
+  getType(): string {
+    for (const subnet of Object.keys(constants6.TYPES)) {
+      if (this.isInSubnet(new Address6(subnet))) {
+        return constants6.TYPES[subnet] as string;
+      }
+    }
+
+    return 'Global unicast';
+  }
+
+  /**
+   * Return the bits in the given range as a BigInt
+   * @memberof Address6
+   * @instance
+   * @returns {bigint}
+   */
+  getBits(start: number, end: number): bigint {
+    return BigInt(`0b${this.getBitsBase2(start, end)}`);
+  }
+
+  /**
+   * Return the bits in the given range as a base-2 string
+   * @memberof Address6
+   * @instance
+   * @returns {String}
+   */
+  getBitsBase2(start: number, end: number): string {
+    return this.binaryZeroPad().slice(start, end);
+  }
+
+  /**
+   * Return the bits in the given range as a base-16 string
+   * @memberof Address6
+   * @instance
+   * @returns {String}
+   */
+  getBitsBase16(start: number, end: number): string {
+    const length = end - start;
+
+    if (length % 4 !== 0) {
+      throw new Error('Length of bits to retrieve must be divisible by four');
+    }
+
+    return this.getBits(start, end)
+      .toString(16)
+      .padStart(length / 4, '0');
+  }
+
+  /**
+   * Return the bits that are set past the subnet mask length
+   * @memberof Address6
+   * @instance
+   * @returns {String}
+   */
+  getBitsPastSubnet(): string {
+    return this.getBitsBase2(this.subnetMask, constants6.BITS);
+  }
+
+  /**
+   * Return the reversed ip6.arpa form of the address
+   * @memberof Address6
+   * @param {Object} options
+   * @param {boolean} options.omitSuffix - omit the "ip6.arpa" suffix
+   * @instance
+   * @returns {String}
+   */
+  reverseForm(options?: common.ReverseFormOptions): string {
+    if (!options) {
+      options = {};
+    }
+
+    const characters = Math.floor(this.subnetMask / 4);
+
+    const reversed = this.canonicalForm()
+      .replace(/:/g, '')
+      .split('')
+      .slice(0, characters)
+      .reverse()
+      .join('.');
+
+    if (characters > 0) {
+      if (options.omitSuffix) {
+        return reversed;
+      }
+
+      return `${reversed}.ip6.arpa.`;
+    }
+
+    if (options.omitSuffix) {
+      return '';
+    }
+
+    return 'ip6.arpa.';
+  }
+
+  /**
+   * Return the correct form of the address
+   * @memberof Address6
+   * @instance
+   * @returns {String}
+   */
+  correctForm(): string {
+    let i;
+    let groups = [];
+
+    let zeroCounter = 0;
+    const zeroes = [];
+
+    for (i = 0; i < this.parsedAddress.length; i++) {
+      const value = parseInt(this.parsedAddress[i], 16);
+
+      if (value === 0) {
+        zeroCounter++;
+      }
+
+      if (value !== 0 && zeroCounter > 0) {
+        if (zeroCounter > 1) {
+          zeroes.push([i - zeroCounter, i - 1]);
+        }
+
+        zeroCounter = 0;
+      }
+    }
+
+    // Do we end with a string of zeroes?
+    if (zeroCounter > 1) {
+      zeroes.push([this.parsedAddress.length - zeroCounter, this.parsedAddress.length - 1]);
+    }
+
+    const zeroLengths = zeroes.map((n) => n[1] - n[0] + 1);
+
+    if (zeroes.length > 0) {
+      const index = zeroLengths.indexOf(Math.max(...zeroLengths) as number);
+
+      groups = compact(this.parsedAddress, zeroes[index]);
+    } else {
+      groups = this.parsedAddress;
+    }
+
+    for (i = 0; i < groups.length; i++) {
+      if (groups[i] !== 'compact') {
+        groups[i] = parseInt(groups[i], 16).toString(16);
+      }
+    }
+
+    let correct = groups.join(':');
+
+    correct = correct.replace(/^compact$/, '::');
+    correct = correct.replace(/(^compact)|(compact$)/, ':');
+    correct = correct.replace(/compact/, '');
+
+    return correct;
+  }
+
+  /**
+   * Return a zero-padded base-2 string representation of the address
+   * @memberof Address6
+   * @instance
+   * @returns {String}
+   * @example
+   * var address = new Address6('2001:4860:4001:803::1011');
+   * address.binaryZeroPad();
+   * // '0010000000000001010010000110000001000000000000010000100000000011
+   * //  0000000000000000000000000000000000000000000000000001000000010001'
+   */
+  binaryZeroPad(): string {
+    return this.bigInt().toString(2).padStart(constants6.BITS, '0');
+  }
+
+  // TODO: Improve the semantics of this helper function
+  parse4in6(address: string): string {
+    const groups = address.split(':');
+    const lastGroup = groups.slice(-1)[0];
+
+    const address4 = lastGroup.match(constants4.RE_ADDRESS);
+
+    if (address4) {
+      this.parsedAddress4 = address4[0];
+      this.address4 = new Address4(this.parsedAddress4);
+
+      for (let i = 0; i < this.address4.groups; i++) {
+        if (/^0[0-9]+/.test(this.address4.parsedAddress[i])) {
+          // The prefix groups haven't been through the bad-character check
+          // yet, so escape them before including in the error HTML.
+          const highlighted = this.address4.parsedAddress.map(spanLeadingZeroes4).join('.');
+          const prefix = groups.slice(0, -1).map(helpers.escapeHtml).join(':');
+          const separator = groups.length > 1 ? ':' : '';
+
+          throw new AddressError(
+            "IPv4 addresses can't have leading zeroes.",
+            `${prefix}${separator}${highlighted}`,
+          );
+        }
+      }
+
+      this.v4 = true;
+
+      groups[groups.length - 1] = this.address4.toGroup6();
+
+      address = groups.join(':');
+    }
+
+    return address;
+  }
+
+  // TODO: Make private?
+  parse(address: string): string[] {
+    address = this.parse4in6(address);
+
+    const badCharacters = address.match(constants6.RE_BAD_CHARACTERS);
+
+    if (badCharacters) {
+      throw new AddressError(
+        `Bad character${
+          badCharacters.length > 1 ? 's' : ''
+        } detected in address: ${badCharacters.join('')}`,
+        address.replace(constants6.RE_BAD_CHARACTERS, '<span class="parse-error">$1</span>'),
+      );
+    }
+
+    const badAddress = address.match(constants6.RE_BAD_ADDRESS);
+
+    if (badAddress) {
+      throw new AddressError(
+        `Address failed regex: ${badAddress.join('')}`,
+        address.replace(constants6.RE_BAD_ADDRESS, '<span class="parse-error">$1</span>'),
+      );
+    }
+
+    let groups: string[] = [];
+
+    const halves = address.split('::');
+
+    if (halves.length === 2) {
+      let first = halves[0].split(':');
+      let last = halves[1].split(':');
+
+      if (first.length === 1 && first[0] === '') {
+        first = [];
+      }
+
+      if (last.length === 1 && last[0] === '') {
+        last = [];
+      }
+
+      const remaining = this.groups - (first.length + last.length);
+
+      if (!remaining) {
+        throw new AddressError('Error parsing groups');
+      }
+
+      this.elidedGroups = remaining;
+
+      this.elisionBegin = first.length;
+      this.elisionEnd = first.length + this.elidedGroups;
+
+      groups = groups.concat(first);
+
+      for (let i = 0; i < remaining; i++) {
+        groups.push('0');
+      }
+
+      groups = groups.concat(last);
+    } else if (halves.length === 1) {
+      groups = address.split(':');
+
+      this.elidedGroups = 0;
+    } else {
+      throw new AddressError('Too many :: groups found');
+    }
+
+    groups = groups.map((group: string) => parseInt(group, 16).toString(16));
+
+    if (groups.length !== this.groups) {
+      throw new AddressError('Incorrect number of groups found');
+    }
+
+    return groups;
+  }
+
+  /**
+   * Return the canonical form of the address
+   * @memberof Address6
+   * @instance
+   * @returns {String}
+   */
+  canonicalForm(): string {
+    return this.parsedAddress.map(paddedHex).join(':');
+  }
+
+  /**
+   * Return the decimal form of the address
+   * @memberof Address6
+   * @instance
+   * @returns {String}
+   */
+  decimal(): string {
+    return this.parsedAddress.map((n) => parseInt(n, 16).toString(10).padStart(5, '0')).join(':');
+  }
+
+  /**
+   * Return the address as a BigInt
+   * @memberof Address6
+   * @instance
+   * @returns {bigint}
+   */
+  bigInt(): bigint {
+    return BigInt(`0x${this.parsedAddress.map(paddedHex).join('')}`);
+  }
+
+  /**
+   * Return the last two groups of this address as an IPv4 address string
+   * @memberof Address6
+   * @instance
+   * @returns {Address4}
+   * @example
+   * var address = new Address6('2001:4860:4001::1825:bf11');
+   * address.to4().correctForm(); // '24.37.191.17'
+   */
+  to4(): Address4 {
+    const binary = this.binaryZeroPad().split('');
+
+    return Address4.fromHex(BigInt(`0b${binary.slice(96, 128).join('')}`).toString(16));
+  }
+
+  /**
+   * Return the v4-in-v6 form of the address
+   * @memberof Address6
+   * @instance
+   * @returns {String}
+   */
+  to4in6(): string {
+    const address4 = this.to4();
+    const address6 = new Address6(this.parsedAddress.slice(0, 6).join(':'), 6);
+
+    const correct = address6.correctForm();
+
+    let infix = '';
+
+    if (!/:$/.test(correct)) {
+      infix = ':';
+    }
+
+    return correct + infix + address4.address;
+  }
+
+  /**
+   * Return an object containing the Teredo properties of the address
+   * @memberof Address6
+   * @instance
+   * @returns {Object}
+   */
+  inspectTeredo(): TeredoProperties {
+    /*
+    - Bits 0 to 31 are set to the Teredo prefix (normally 2001:0000::/32).
+    - Bits 32 to 63 embed the primary IPv4 address of the Teredo server that
+      is used.
+    - Bits 64 to 79 can be used to define some flags. Currently only the
+      higher order bit is used; it is set to 1 if the Teredo client is
+      located behind a cone NAT, 0 otherwise. For Microsoft's Windows Vista
+      and Windows Server 2008 implementations, more bits are used. In those
+      implementations, the format for these 16 bits is "CRAAAAUG AAAAAAAA",
+      where "C" remains the "Cone" flag. The "R" bit is reserved for future
+      use. The "U" bit is for the Universal/Local flag (set to 0). The "G" bit
+      is Individual/Group flag (set to 0). The A bits are set to a 12-bit
+      randomly generated number chosen by the Teredo client to introduce
+      additional protection for the Teredo node against IPv6-based scanning
+      attacks.
+    - Bits 80 to 95 contains the obfuscated UDP port number. This is the
+      port number that is mapped by the NAT to the Teredo client with all
+      bits inverted.
+    - Bits 96 to 127 contains the obfuscated IPv4 address. This is the
+      public IPv4 address of the NAT with all bits inverted.
+    */
+    const prefix = this.getBitsBase16(0, 32);
+
+    const bitsForUdpPort: bigint = this.getBits(80, 96);
+    // eslint-disable-next-line no-bitwise
+    const udpPort = (bitsForUdpPort ^ BigInt('0xffff')).toString();
+
+    const server4 = Address4.fromHex(this.getBitsBase16(32, 64));
+
+    const bitsForClient4 = this.getBits(96, 128);
+    // eslint-disable-next-line no-bitwise
+    const client4 = Address4.fromHex((bitsForClient4 ^ BigInt('0xffffffff')).toString(16));
+
+    const flagsBase2 = this.getBitsBase2(64, 80);
+
+    const coneNat = testBit(flagsBase2, 15);
+    const reserved = testBit(flagsBase2, 14);
+    const groupIndividual = testBit(flagsBase2, 8);
+    const universalLocal = testBit(flagsBase2, 9);
+    const nonce = BigInt(`0b${flagsBase2.slice(2, 6) + flagsBase2.slice(8, 16)}`).toString(10);
+
+    return {
+      prefix: `${prefix.slice(0, 4)}:${prefix.slice(4, 8)}`,
+      server4: server4.address,
+      client4: client4.address,
+      flags: flagsBase2,
+      coneNat,
+      microsoft: {
+        reserved,
+        universalLocal,
+        groupIndividual,
+        nonce,
+      },
+      udpPort,
+    };
+  }
+
+  /**
+   * Return an object containing the 6to4 properties of the address
+   * @memberof Address6
+   * @instance
+   * @returns {Object}
+   */
+  inspect6to4(): SixToFourProperties {
+    /*
+    - Bits 0 to 15 are set to the 6to4 prefix (2002::/16).
+    - Bits 16 to 48 embed the IPv4 address of the 6to4 gateway that is used.
+    */
+
+    const prefix = this.getBitsBase16(0, 16);
+
+    const gateway = Address4.fromHex(this.getBitsBase16(16, 48));
+
+    return {
+      prefix: prefix.slice(0, 4),
+      gateway: gateway.address,
+    };
+  }
+
+  /**
+   * Return a v6 6to4 address from a v6 v4inv6 address
+   * @memberof Address6
+   * @instance
+   * @returns {Address6}
+   */
+  to6to4(): Address6 | null {
+    if (!this.is4()) {
+      return null;
+    }
+
+    const addr6to4 = [
+      '2002',
+      this.getBitsBase16(96, 112),
+      this.getBitsBase16(112, 128),
+      '',
+      '/16',
+    ].join(':');
+
+    return new Address6(addr6to4);
+  }
+
+  /**
+   * Return a byte array
+   * @memberof Address6
+   * @instance
+   * @returns {Array}
+   */
+  toByteArray(): number[] {
+    const valueWithoutPadding = this.bigInt().toString(16);
+    const leadingPad = '0'.repeat(valueWithoutPadding.length % 2);
+
+    const value = `${leadingPad}${valueWithoutPadding}`;
+
+    const bytes = [];
+    for (let i = 0, length = value.length; i < length; i += 2) {
+      bytes.push(parseInt(value.substring(i, i + 2), 16));
+    }
+
+    return bytes;
+  }
+
+  /**
+   * Return an unsigned byte array
+   * @memberof Address6
+   * @instance
+   * @returns {Array}
+   */
+  toUnsignedByteArray(): number[] {
+    return this.toByteArray().map(unsignByte);
+  }
+
+  /**
+   * Convert a byte array to an Address6 object
+   * @memberof Address6
+   * @static
+   * @returns {Address6}
+   */
+  static fromByteArray(bytes: Array<any>): Address6 {
+    return this.fromUnsignedByteArray(bytes.map(unsignByte));
+  }
+
+  /**
+   * Convert an unsigned byte array to an Address6 object
+   * @memberof Address6
+   * @static
+   * @returns {Address6}
+   */
+  static fromUnsignedByteArray(bytes: Array<any>): Address6 {
+    const BYTE_MAX = BigInt('256');
+    let result = BigInt('0');
+    let multiplier = BigInt('1');
+
+    for (let i = bytes.length - 1; i >= 0; i--) {
+      result += multiplier * BigInt(bytes[i].toString(10));
+
+      multiplier *= BYTE_MAX;
+    }
+
+    return Address6.fromBigInt(result);
+  }
+
+  // #region Attributes
+  /**
+   * Returns true if the given address is in the subnet of the current address
+   * @memberof Address6
+   * @instance
+   * @returns {boolean}
+   */
+  isInSubnet = common.isInSubnet;
+
+  /**
+   * Returns true if the address is correct, false otherwise
+   * @memberof Address6
+   * @instance
+   * @returns {boolean}
+   */
+  isCorrect = common.isCorrect(constants6.BITS);
+
+  /**
+   * Returns true if the address is in the canonical form, false otherwise
+   * @memberof Address6
+   * @instance
+   * @returns {boolean}
+   */
+  isCanonical(): boolean {
+    return this.addressMinusSuffix === this.canonicalForm();
+  }
+
+  /**
+   * Returns true if the address is a link local address, false otherwise
+   * @memberof Address6
+   * @instance
+   * @returns {boolean}
+   */
+  isLinkLocal(): boolean {
+    // Zeroes are required, i.e. we can't check isInSubnet with 'fe80::/10'
+    if (
+      this.getBitsBase2(0, 64) ===
+      '1111111010000000000000000000000000000000000000000000000000000000'
+    ) {
+      return true;
+    }
+
+    return false;
+  }
+
+  /**
+   * Returns true if the address is a multicast address, false otherwise
+   * @memberof Address6
+   * @instance
+   * @returns {boolean}
+   */
+  isMulticast(): boolean {
+    return this.getType() === 'Multicast';
+  }
+
+  /**
+   * Returns true if the address is a v4-in-v6 address, false otherwise
+   * @memberof Address6
+   * @instance
+   * @returns {boolean}
+   */
+  is4(): boolean {
+    return this.v4;
+  }
+
+  /**
+   * Returns true if the address is a Teredo address, false otherwise
+   * @memberof Address6
+   * @instance
+   * @returns {boolean}
+   */
+  isTeredo(): boolean {
+    return this.isInSubnet(new Address6('2001::/32'));
+  }
+
+  /**
+   * Returns true if the address is a 6to4 address, false otherwise
+   * @memberof Address6
+   * @instance
+   * @returns {boolean}
+   */
+  is6to4(): boolean {
+    return this.isInSubnet(new Address6('2002::/16'));
+  }
+
+  /**
+   * Returns true if the address is a loopback address, false otherwise
+   * @memberof Address6
+   * @instance
+   * @returns {boolean}
+   */
+  isLoopback(): boolean {
+    return this.getType() === 'Loopback';
+  }
+  // #endregion
+
+  // #region HTML
+  /**
+   * @returns {String} the address in link form with a default port of 80
+   */
+  href(optionalPort?: number | string): string {
+    if (optionalPort === undefined) {
+      optionalPort = '';
+    } else {
+      optionalPort = `:${optionalPort}`;
+    }
+
+    return `http://[${this.correctForm()}]${optionalPort}/`;
+  }
+
+  /**
+   * @returns {String} a link suitable for conveying the address via a URL hash
+   */
+  link(options?: { className?: string; prefix?: string; v4?: boolean }): string {
+    if (!options) {
+      options = {};
+    }
+
+    if (options.className === undefined) {
+      options.className = '';
+    }
+
+    if (options.prefix === undefined) {
+      options.prefix = '/#address=';
+    }
+
+    if (options.v4 === undefined) {
+      options.v4 = false;
+    }
+
+    let formFunction = this.correctForm;
+
+    if (options.v4) {
+      formFunction = this.to4in6;
+    }
+
+    const form = formFunction.call(this);
+    const safeHref = helpers.escapeHtml(`${options.prefix}${form}`);
+    const safeForm = helpers.escapeHtml(form);
+
+    if (options.className) {
+      const safeClass = helpers.escapeHtml(options.className);
+
+      return `<a href="${safeHref}" class="${safeClass}">${safeForm}</a>`;
+    }
+
+    return `<a href="${safeHref}">${safeForm}</a>`;
+  }
+
+  /**
+   * Groups an address
+   * @returns {String}
+   */
+  group(): string {
+    if (this.elidedGroups === 0) {
+      // The simple case
+      return helpers.simpleGroup(this.addressMinusSuffix).join(':');
+    }
+
+    assert(typeof this.elidedGroups === 'number');
+    assert(typeof this.elisionBegin === 'number');
+
+    // The elided case
+    const output = [];
+
+    const [left, right] = this.addressMinusSuffix.split('::');
+
+    if (left.length) {
+      output.push(...helpers.simpleGroup(left));
+    } else {
+      output.push('');
+    }
+
+    const classes = ['hover-group'];
+
+    for (let i = this.elisionBegin; i < this.elisionBegin + this.elidedGroups; i++) {
+      classes.push(`group-${i}`);
+    }
+
+    output.push(`<span class="${classes.join(' ')}"></span>`);
+
+    if (right.length) {
+      output.push(...helpers.simpleGroup(right, this.elisionEnd));
+    } else {
+      output.push('');
+    }
+
+    if (this.is4()) {
+      assert(this.address4 instanceof Address4);
+
+      output.pop();
+      output.push(this.address4.groupForV6());
+    }
+
+    return output.join(':');
+  }
+  // #endregion
+
+  // #region Regular expressions
+  /**
+   * Generate a regular expression string that can be used to find or validate
+   * all variations of this address
+   * @memberof Address6
+   * @instance
+   * @param {boolean} substringSearch
+   * @returns {string}
+   */
+  regularExpressionString(this: Address6, substringSearch: boolean = false): string {
+    let output: string[] = [];
+
+    // TODO: revisit why this is necessary
+    const address6 = new Address6(this.correctForm());
+
+    if (address6.elidedGroups === 0) {
+      // The simple case
+      output.push(simpleRegularExpression(address6.parsedAddress));
+    } else if (address6.elidedGroups === constants6.GROUPS) {
+      // A completely elided address
+      output.push(possibleElisions(constants6.GROUPS));
+    } else {
+      // A partially elided address
+      const halves = address6.address.split('::');
+
+      if (halves[0].length) {
+        output.push(simpleRegularExpression(halves[0].split(':')));
+      }
+
+      assert(typeof address6.elidedGroups === 'number');
+
+      output.push(
+        possibleElisions(address6.elidedGroups, halves[0].length !== 0, halves[1].length !== 0),
+      );
+
+      if (halves[1].length) {
+        output.push(simpleRegularExpression(halves[1].split(':')));
+      }
+
+      output = [output.join(':')];
+    }
+
+    if (!substringSearch) {
+      output = [
+        '(?=^|',
+        ADDRESS_BOUNDARY,
+        '|[^\\w\\:])(',
+        ...output,
+        ')(?=[^\\w\\:]|',
+        ADDRESS_BOUNDARY,
+        '|$)',
+      ];
+    }
+
+    return output.join('');
+  }
+
+  /**
+   * Generate a regular expression that can be used to find or validate all
+   * variations of this address.
+   * @memberof Address6
+   * @instance
+   * @param {boolean} substringSearch
+   * @returns {RegExp}
+   */
+  regularExpression(this: Address6, substringSearch: boolean = false): RegExp {
+    return new RegExp(this.regularExpressionString(substringSearch), 'i');
+  }
+  // #endregion
+}
diff --git a/mqtt-backend/node_modules/ip-address/src/v4/constants.ts b/mqtt-backend/node_modules/ip-address/src/v4/constants.ts
new file mode 100644
index 0000000..73c32f1
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/src/v4/constants.ts
@@ -0,0 +1,7 @@
+export const BITS = 32;
+export const GROUPS = 4;
+
+export const RE_ADDRESS =
+  /^(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/g;
+
+export const RE_SUBNET_STRING = /\/\d{1,2}$/;
diff --git a/mqtt-backend/node_modules/ip-address/src/v6/constants.ts b/mqtt-backend/node_modules/ip-address/src/v6/constants.ts
new file mode 100644
index 0000000..e23bfa5
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/src/v6/constants.ts
@@ -0,0 +1,79 @@
+export const BITS = 128;
+export const GROUPS = 8;
+
+/**
+ * Represents IPv6 address scopes
+ * @memberof Address6
+ * @static
+ */
+export const SCOPES: { [key: number]: string | undefined } = {
+  0: 'Reserved',
+  1: 'Interface local',
+  2: 'Link local',
+  4: 'Admin local',
+  5: 'Site local',
+  8: 'Organization local',
+  14: 'Global',
+  15: 'Reserved',
+} as const;
+
+/**
+ * Represents IPv6 address types
+ * @memberof Address6
+ * @static
+ */
+export const TYPES: { [key: string]: string | undefined } = {
+  'ff01::1/128': 'Multicast (All nodes on this interface)',
+  'ff01::2/128': 'Multicast (All routers on this interface)',
+  'ff02::1/128': 'Multicast (All nodes on this link)',
+  'ff02::2/128': 'Multicast (All routers on this link)',
+  'ff05::2/128': 'Multicast (All routers in this site)',
+  'ff02::5/128': 'Multicast (OSPFv3 AllSPF routers)',
+  'ff02::6/128': 'Multicast (OSPFv3 AllDR routers)',
+  'ff02::9/128': 'Multicast (RIP routers)',
+  'ff02::a/128': 'Multicast (EIGRP routers)',
+  'ff02::d/128': 'Multicast (PIM routers)',
+  'ff02::16/128': 'Multicast (MLDv2 reports)',
+  'ff01::fb/128': 'Multicast (mDNSv6)',
+  'ff02::fb/128': 'Multicast (mDNSv6)',
+  'ff05::fb/128': 'Multicast (mDNSv6)',
+  'ff02::1:2/128': 'Multicast (All DHCP servers and relay agents on this link)',
+  'ff05::1:2/128': 'Multicast (All DHCP servers and relay agents in this site)',
+  'ff02::1:3/128': 'Multicast (All DHCP servers on this link)',
+  'ff05::1:3/128': 'Multicast (All DHCP servers in this site)',
+  '::/128': 'Unspecified',
+  '::1/128': 'Loopback',
+  'ff00::/8': 'Multicast',
+  'fe80::/10': 'Link-local unicast',
+} as const;
+
+/**
+ * A regular expression that matches bad characters in an IPv6 address
+ * @memberof Address6
+ * @static
+ */
+export const RE_BAD_CHARACTERS = /([^0-9a-f:/%])/gi;
+
+/**
+ * A regular expression that matches an incorrect IPv6 address
+ * @memberof Address6
+ * @static
+ */
+export const RE_BAD_ADDRESS = /([0-9a-f]{5,}|:{3,}|[^:]:$|^:[^:]|\/$)/gi;
+
+/**
+ * A regular expression that matches an IPv6 subnet
+ * @memberof Address6
+ * @static
+ */
+export const RE_SUBNET_STRING = /\/\d{1,3}(?=%|$)/;
+
+/**
+ * A regular expression that matches an IPv6 zone
+ * @memberof Address6
+ * @static
+ */
+export const RE_ZONE_STRING = /%.*$/;
+
+export const RE_URL = /^\[{0,1}([0-9a-f:]+)\]{0,1}/;
+export const RE_URL_WITH_PORT = /\[([0-9a-f:]+)\]:([0-9]{1,5})/;
diff --git a/mqtt-backend/node_modules/ip-address/src/v6/helpers.ts b/mqtt-backend/node_modules/ip-address/src/v6/helpers.ts
new file mode 100644
index 0000000..2cb10a5
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/src/v6/helpers.ts
@@ -0,0 +1,58 @@
+export function escapeHtml(s: string): string {
+  return s
+    .replace(/&/g, '&amp;')
+    .replace(/</g, '&lt;')
+    .replace(/>/g, '&gt;')
+    .replace(/"/g, '&quot;')
+    .replace(/'/g, '&#39;');
+}
+
+/**
+ * @returns {String} the string with all zeroes contained in a <span>
+ */
+export function spanAllZeroes(s: string): string {
+  return escapeHtml(s).replace(/(0+)/g, '<span class="zero">$1</span>');
+}
+
+/**
+ * @returns {String} the string with each character contained in a <span>
+ */
+export function spanAll(s: string, offset: number = 0): string {
+  const letters = s.split('');
+
+  return letters
+    .map(
+      (n, i) =>
+        `<span class="digit value-${escapeHtml(n)} position-${i + offset}">${spanAllZeroes(n)}</span>`,
+    )
+    .join('');
+}
+
+function spanLeadingZeroesSimple(group: string): string {
+  return escapeHtml(group).replace(/^(0+)/, '<span class="zero">$1</span>');
+}
+
+/**
+ * @returns {String} the string with leading zeroes contained in a <span>
+ */
+export function spanLeadingZeroes(address: string): string {
+  const groups = address.split(':');
+
+  return groups.map((g) => spanLeadingZeroesSimple(g)).join(':');
+}
+
+/**
+ * Groups an address
+ * @returns {String} a grouped address
+ */
+export function simpleGroup(addressString: string, offset: number = 0): string[] {
+  const groups = addressString.split(':');
+
+  return groups.map((g, i) => {
+    if (/group-v4/.test(g)) {
+      return g;
+    }
+
+    return `<span class="hover-group group-${i + offset}">${spanLeadingZeroesSimple(g)}</span>`;
+  });
+}
diff --git a/mqtt-backend/node_modules/ip-address/src/v6/regular-expressions.ts b/mqtt-backend/node_modules/ip-address/src/v6/regular-expressions.ts
new file mode 100644
index 0000000..a511b84
--- /dev/null
+++ b/mqtt-backend/node_modules/ip-address/src/v6/regular-expressions.ts
@@ -0,0 +1,94 @@
+import * as v6 from './constants';
+
+export function groupPossibilities(possibilities: string[]): string {
+  return `(${possibilities.join('|')})`;
+}
+
+export function padGroup(group: string): string {
+  if (group.length < 4) {
+    return `0{0,${4 - group.length}}${group}`;
+  }
+
+  return group;
+}
+
+export const ADDRESS_BOUNDARY = '[^A-Fa-f0-9:]';
+
+export function simpleRegularExpression(groups: string[]) {
+  const zeroIndexes: number[] = [];
+
+  groups.forEach((group, i) => {
+    const groupInteger = parseInt(group, 16);
+
+    if (groupInteger === 0) {
+      zeroIndexes.push(i);
+    }
+  });
+
+  // You can technically elide a single 0, this creates the regular expressions
+  // to match that eventuality
+  const possibilities = zeroIndexes.map((zeroIndex) =>
+    groups
+      .map((group, i) => {
+        if (i === zeroIndex) {
+          const elision = i === 0 || i === v6.GROUPS - 1 ? ':' : '';
+
+          return groupPossibilities([padGroup(group), elision]);
+        }
+
+        return padGroup(group);
+      })
+      .join(':'),
+  );
+
+  // The simplest case
+  possibilities.push(groups.map(padGroup).join(':'));
+
+  return groupPossibilities(possibilities);
+}
+
+export function possibleElisions(
+  elidedGroups: number,
+  moreLeft?: boolean,
+  moreRight?: boolean,
+): string {
+  const left = moreLeft ? '' : ':';
+  const right = moreRight ? '' : ':';
+
+  const possibilities = [];
+
+  // 1. elision of everything (::)
+  if (!moreLeft && !moreRight) {
+    possibilities.push('::');
+  }
+
+  // 2. complete elision of the middle
+  if (moreLeft && moreRight) {
+    possibilities.push('');
+  }
+
+  if ((moreRight && !moreLeft) || (!moreRight && moreLeft)) {
+    // 3. complete elision of one side
+    possibilities.push(':');
+  }
+
+  // 4. elision from the left side
+  possibilities.push(`${left}(:0{1,4}){1,${elidedGroups - 1}}`);
+
+  // 5. elision from the right side
+  possibilities.push(`(0{1,4}:){1,${elidedGroups - 1}}${right}`);
+
+  // 6. no elision
+  possibilities.push(`(0{1,4}:){${elidedGroups - 1}}0{1,4}`);
+
+  // 7. elision (including sloppy elision) from the middle
+  for (let groups = 1; groups < elidedGroups - 1; groups++) {
+    for (let position = 1; position < elidedGroups - groups; position++) {
+      possibilities.push(
+        `(0{1,4}:){${position}}:(0{1,4}:){${elidedGroups - position - groups - 1}}0{1,4}`,
+      );
+    }
+  }
+
+  return groupPossibilities(possibilities);
+}
diff --git a/mqtt-backend/node_modules/js-sdsl/CHANGELOG.md b/mqtt-backend/node_modules/js-sdsl/CHANGELOG.md
new file mode 100644
index 0000000..3156f94
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/CHANGELOG.md
@@ -0,0 +1,211 @@
+# Change Log
+
+All notable changes to this project will be documented in this file.
+
+The format is based on Keep a Changelog and this project adheres to Semantic Versioning.
+
+## [4.3.0] - 2023.01.20
+
+### Added
+
+- Add public member `container` to `Iterator` which means the container that the iterator pointed to.
+
+### Changed
+
+- Reimplement `Queue`, separate `Queue` from `Deque`.
+
+## [4.2.0] - 2022.11.20
+
+### Changed
+
+- Optimized the structure of class `TreeNodeEnableIndex`.
+- Change the `iterator access denied` error message to reduce the packing size.
+- Change the internal storage of the hash container to the form of a linked list, traversing in insertion order.
+- Standardize hash container. Make it extends from `Container` and add general functions.
+- Refactor `LinkList` to do optimization.
+
+### Added
+
+- Add public `length` property to all the container.
+- Add returned value to `pop` function including `popBack` and `popFront` to all the container which has such function.
+- Add returned value to `eraseElementByKey` which means whether erase successfully.
+- Add returned value to `push` or `insert` function which means the size of the container.
+
+### Fixed
+
+- Fixed wrong error type when `updateKeyByIterator`.
+- Fixed wrong iterator was returned when erase tree reverse iterator.
+
+## [4.2.0-beta.1] - 2022.11.06
+
+### Changed
+
+- Remove all the arrow function to optimize.
+- Modify `HashContainer` implementation to optimize.
+
+## [4.2.0-beta.0] - 2022.10.30
+
+### Added
+
+- Add `ts` sourcemap for debug mode.
+- Add `this` param for `forEach` function.
+- Support single package umd build.
+
+### Changed
+
+- Changed the packaging method of isolation packages release and the method of the member export.
+
+## [4.1.5] - 2022.09.30
+
+### Added
+
+- Add `find`, `remove`, `updateItem` and `toArray` functions to `PriorityQueue`.
+- Support single package release (use scope @js-sdsl).
+
+## [4.1.5-beta.1] - 2022.09.23
+
+### Fixed
+
+- Get wrong tree index when size is 0.
+
+## [4.1.5-beta.0] - 2022.09.23
+
+### Added
+
+- Add `index` property to tree iterator which represents the sequential index of the iterator in the tree.
+
+### Changed
+
+- Minimal optimization with private properties mangling, macro inlining and const enum.
+- Private properties are now mangled.
+- Remove `checkWithinAccessParams` function.
+- Constants of `HashContainer` are moved to `HashContainerConst` const enum.
+- The iteratorType parameter in the constructor now changed from `boolean` type to `IteratorType` const enum type.
+- The type of `TreeNode.color` is now changed from `boolean` to `TreeNodeColor` const enum.
+- Turn some member exports into export-only types.
+
+### Fixed
+
+- Fixed wrong iterator error message.
+
+## [4.1.4] - 2022.09.07
+
+### Added
+
+- Add some notes.
+
+### Changed
+
+- Optimize hash container.
+- Abstracting out the hash container.
+
+### Fixed
+
+- Fixed tree get height function return one larger than the real height.
+- Tree-shaking not work in ES module.
+- `Queue` and `Deque` should return `undefined` when container is empty.
+
+## [4.1.4-beta.0] - 2022.08.31
+
+### Added
+
+- Add function update key by iterator.
+- Add iterator copy function to get a copy of itself.
+- Add insert by iterator hint function in tree container.
+
+### Changed
+
+- Changed OrderedMap's iterator pointer get from `Object.defineProperty'` to  `Proxy`.
+- Improve iterator performance by remove some judgment.
+- Change iterator type description from `normal` and `reverse` to boolean.
+
+## [4.1.2-beta.0] - 2022.08.27
+
+### Added
+
+- Make `SequentialContainer` and `TreeBaseContainer` export in the index.
+
+### Changed
+
+- Change rbTree binary search from recursive to loop implementation (don't effect using).
+- Reduce memory waste during deque initialization.
+
+### Fixed
+
+- Fixed priority queue not dereference on pop.
+
+## [4.1.1] - 2022.08.23
+
+### Fixed
+
+- Forgot to reset root node on rotation in red-black tree delete operation.
+- Fix iterator invalidation after tree container removes iterator.
+
+## [4.1.0] - 2022.08.21
+
+### Changed
+
+- Change some functions from recursive to loop implementation (don't effect using).
+- Change some iterator function parameter type.
+- Change commonjs target to `es6`.
+- Change `Deque` from sequential queue to circular queue.
+- Optimize so many places (don't affect using).
+
+### Fixed
+
+- Fix `Vector` length bugs.
+
+## [4.0.3] - 2022-08-13
+
+### Changed
+
+- Change `if (this.empty())` to `if (!this.length)`.
+- Change some unit test.
+- Change class type and optimized type design.
+
+### Fixed
+
+- Fix can push undefined to deque.
+
+## [4.0.0] - 2022-07-30
+
+### Changed
+
+- Remove InternalError error as much as possible (don't affect using).
+- Change `HashSet` api `eraseElementByValue`'s name to `eraseElementByKey`.
+- Change some unit tests to improve coverage (don't affect using).
+
+## [4.0.0-beta.0] - 2022-07-24
+
+### Added
+
+- Complete test examples (don't effect using).
+- The error thrown is standardized, you can catch it according to the error type.
+
+### Changed
+
+- Refactor all container from function to class (don't affect using).
+- Abstracting tree containers and hash containers, change `Set`'s and `Map`'s name to `OrderedSet` and `OrderedMap` to distinguish it from the official container.
+- Change `OrderedSet` api `eraseElementByValue`'s name to `eraseElementByKey`.
+
+### Fixed
+
+- Fixed so many bugs.
+
+## [3.0.0-beta.0] - 2022-04-29
+
+### Added
+
+- Bidirectional iterator is provided for all containers except Stack, Queue, HashSet and HashMap.
+- Added begin, end, rBegin and rEnd functions to some containers for using iterator.
+- Added `eraseElementByIterator` function.
+
+### Changed
+
+- Changed Pair type `T, K` to `K, V` (don't affect using).
+- Changed `find`, `lowerBound`, `upperBound`, `reverseLowerBound` and `reverseUpperBound` function's returned value to `Iterator`.
+
+### Fixed
+
+- Fixed an error when the insert value was 0.
+- Fixed the problem that the lower version browser does not recognize symbol Compilation error caused by iterator.
diff --git a/mqtt-backend/node_modules/js-sdsl/LICENSE b/mqtt-backend/node_modules/js-sdsl/LICENSE
new file mode 100644
index 0000000..d46bd7e
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2021 Zilong Yao
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/js-sdsl/README.md b/mqtt-backend/node_modules/js-sdsl/README.md
new file mode 100644
index 0000000..dfa6dc8
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/README.md
@@ -0,0 +1,296 @@
+<p align="center">
+  <a href="https://js-sdsl.org/" target="_blank" rel="noopener noreferrer">
+    <img src="https://js-sdsl.org/assets/image/logo/logo-removebg.png" alt="js-sdsl logo" width="120" />
+  </a>
+</p>
+
+<h3><p align="center">A javascript standard data structure library which benchmark against C++ STL</p></h3>
+
+<p align="center">
+  <a href="https://www.npmjs.com/package/js-sdsl"><img src="https://img.shields.io/npm/v/js-sdsl.svg" alt="NPM Version" /></a>
+  <a href="https://github.com/js-sdsl/js-sdsl/actions/workflows/build.yml"><img src="https://img.shields.io/github/actions/workflow/status/js-sdsl/js-sdsl/build.yml" alt="Build Status" /></a>
+  <a href='https://coveralls.io/github/js-sdsl/js-sdsl?branch=main'><img src='https://coveralls.io/repos/github/js-sdsl/js-sdsl/badge.svg?branch=main' alt='Coverage Status' /></a>
+  <a href="https://github.com/js-sdsl/js-sdsl"><img src="https://img.shields.io/github/stars/js-sdsl/js-sdsl.svg" alt="GITHUB Star" /></a>
+  <a href="https://npmcharts.com/compare/js-sdsl?minimal=true"><img src="https://img.shields.io/npm/dm/js-sdsl.svg" alt="NPM Downloads" /></a>
+  <a href="https://unpkg.com/js-sdsl/dist/umd/js-sdsl.min.js"><img src="https://img.badgesize.io/https://unpkg.com/js-sdsl/dist/umd/js-sdsl.min.js?compression=gzip&style=flat-square/" alt="Gzip Size"></a>
+  <a href="https://openbase.com/js/js-sdsl?utm_source=embedded&amp;utm_medium=badge&amp;utm_campaign=rate-badge"><img src="https://badges.openbase.com/js/rating/js-sdsl.svg?token=fh3LMNOV+JSWykSjtg1rA8kouSYkJoIDzGbvaByq5X0=" alt="Rate this package"/></a>
+  <a href="https://opensource.org/licenses/MIT"><img src="https://img.shields.io/npm/l/js-sdsl.svg" alt="MIT-license" /></a>
+  <a href="https://github.com/js-sdsl/js-sdsl/"><img src="https://img.shields.io/github/languages/top/js-sdsl/js-sdsl.svg" alt="GITHUB-language" /></a>
+</p>
+
+<p align="center">English | <a href="https://github.com/js-sdsl/js-sdsl/blob/main/README.zh-CN.md">简体中文</a></p>
+
+## ✨ Included data structures
+
+- **Stack** - first in last out stack.
+- **Queue** - first in first out queue.
+- **PriorityQueue** - heap-implemented priority queue.
+- **Vector** - protected array, cannot to operate properties like `length` directly.
+- **LinkList** - linked list of non-contiguous memory addresses.
+- **Deque** - double-ended-queue, O(1) time complexity to `unshift` or getting elements by index.
+- **OrderedSet** - sorted set which implemented by red black tree.
+- **OrderedMap** - sorted map which implemented by red black tree.
+- **HashSet** - refer to the [polyfill of ES6 Set](https://github.com/rousan/collections-es6).
+- **HashMap** - refer to the [polyfill of ES6 Map](https://github.com/rousan/collections-es6).
+
+## ⚔️ Benchmark
+
+We are benchmarking against other popular data structure libraries. In some ways we're better than the best library. See [benchmark](https://js-sdsl.org/#/test/benchmark-analyze).
+
+## 🖥 Supported platforms
+
+<table>
+  <tr align="center">
+    <td>
+      <img alt="IE / Edge" src="https://js-sdsl.org/assets/image/platform/edge.png" />
+      <div>IE / Edge</div>
+    </td>
+    <td>
+      <img alt="Firefox" src="https://js-sdsl.org/assets/image/platform/firefox.png" />
+      <div>Firefox</div>
+    </td>
+    <td>
+      <img alt="Chrome" src="https://js-sdsl.org/assets/image/platform/chrome.png" />
+      <div>Chrome</div>
+    </td>
+    <td>
+      <img alt="Safari" src="https://js-sdsl.org/assets/image/platform/safari.png" />
+      <div>Safari</div>
+    </td>
+    <td>
+      <img alt="Opera" src="https://js-sdsl.org/assets/image/platform/opera.png" />
+      <div>Opera</div>
+    </td>
+    <td>
+      <img alt="NodeJs" src="https://js-sdsl.org/assets/image/platform/nodejs.png" />
+      <div>NodeJs</div>
+    </td>
+  </tr>
+  <tr align="center">
+    <td>Edge 12</td>
+    <td>31</td>
+    <td>49</td>
+    <td>10</td>
+    <td>36</td>
+    <td>10</td>
+  </tr>
+</table>
+
+## 📦 Download
+
+Download directly by cdn:
+
+- [js-sdsl.js](https://unpkg.com/js-sdsl/dist/umd/js-sdsl.js) (for development)
+- [js-sdsl.min.js](https://unpkg.com/js-sdsl/dist/umd/js-sdsl.min.js) (for production)
+
+Or install js-sdsl using npm:
+
+```bash
+npm install js-sdsl
+```
+
+Or you can download the isolation packages containing only the containers you want:
+
+| package                                           | npm                                                                   | size                                                             | docs                        |
+|---------------------------------------------------|-----------------------------------------------------------------------|------------------------------------------------------------------|-----------------------------|
+| [@js-sdsl/stack][stack-package]                   | [![NPM Package][stack-npm-version]][stack-npm-link]                   | [![GZIP Size][stack-umd-size]][stack-umd-link]                   | [link][stack-docs]          |
+| [@js-sdsl/queue][queue-package]                   | [![NPM Package][queue-npm-version]][queue-npm-link]                   | [![GZIP Size][queue-umd-size]][queue-umd-link]                   | [link][queue-docs]          |
+| [@js-sdsl/priority-queue][priority-queue-package] | [![NPM Package][priority-queue-npm-version]][priority-queue-npm-link] | [![GZIP Size][priority-queue-umd-size]][priority-queue-umd-link] | [link][priority-queue-docs] |
+| [@js-sdsl/vector][vector-package]                 | [![NPM Package][vector-npm-version]][vector-npm-link]                 | [![GZIP Size][vector-umd-size]][vector-umd-link]                 | [link][vector-docs]         |
+| [@js-sdsl/link-list][link-list-package]           | [![NPM Package][link-list-npm-version]][link-list-npm-link]           | [![GZIP Size][link-list-umd-size]][link-list-umd-link]           | [link][link-list-docs]      |
+| [@js-sdsl/deque][deque-package]                   | [![NPM Package][deque-npm-version]][deque-npm-link]                   | [![GZIP Size][deque-umd-size]][deque-umd-link]                   | [link][deque-docs]          |
+| [@js-sdsl/ordered-set][ordered-set-package]       | [![NPM Package][ordered-set-npm-version]][ordered-set-npm-link]       | [![GZIP Size][ordered-set-umd-size]][ordered-set-umd-link]       | [link][ordered-set-docs]    |
+| [@js-sdsl/ordered-map][ordered-map-package]       | [![NPM Package][ordered-map-npm-version]][ordered-map-npm-link]       | [![GZIP Size][ordered-map-umd-size]][ordered-map-umd-link]       | [link][ordered-map-docs]    |
+| [@js-sdsl/hash-set][hash-set-package]             | [![NPM Package][hash-set-npm-version]][hash-set-npm-link]             | [![GZIP Size][hash-set-umd-size]][hash-set-umd-link]             | [link][hash-set-docs]       |
+| [@js-sdsl/hash-map][hash-map-package]             | [![NPM Package][hash-map-npm-version]][hash-map-npm-link]             | [![GZIP Size][hash-map-umd-size]][hash-map-umd-link]             | [link][hash-map-docs]       |
+
+## 🪒 Usage
+
+You can visit our [official website](https://js-sdsl.org/) to get more information.
+
+To help you have a better use, we also provide this [API document](https://js-sdsl.org/js-sdsl/index.html).
+
+For previous versions of the documentation, please visit:
+
+`https://js-sdsl.org/js-sdsl/previous/v${version}/index.html`
+
+E.g.
+
+[https://js-sdsl.org/js-sdsl/previous/v4.1.5/index.html](https://js-sdsl.org/js-sdsl/previous/v4.1.5/index.html)
+
+### For browser
+
+```html
+<script src="https://unpkg.com/js-sdsl/dist/umd/js-sdsl.min.js"></script>
+<script>
+    const {
+      Vector,
+      Stack,
+      Queue,
+      LinkList,
+      Deque,
+      PriorityQueue,
+      OrderedSet,
+      OrderedMap,
+      HashSet,
+      HashMap
+    } = sdsl;
+    const myOrderedMap = new OrderedMap();
+    myOrderedMap.setElement(1, 2);
+    console.log(myOrderedMap.getElementByKey(1)); // 2
+</script>
+```
+
+### For npm
+
+```javascript
+// esModule
+import { OrderedMap } from 'js-sdsl';
+// commonJs
+const { OrderedMap } = require('js-sdsl');
+const myOrderedMap = new OrderedMap();
+myOrderedMap.setElement(1, 2);
+console.log(myOrderedMap.getElementByKey(1)); // 2
+```
+
+## 🛠 Test
+
+### Unit test
+
+We use [karma](https://karma-runner.github.io/) and [mocha](https://mochajs.org/) frame to do unit tests and synchronize to [coveralls](https://coveralls.io/github/js-sdsl/js-sdsl). You can run `yarn test:unit` command to reproduce it.
+
+### For performance
+
+We tested most of the functions for efficiency. You can go to [`gh-pages/performance.md`](https://github.com/js-sdsl/js-sdsl/blob/gh-pages/performance.md) to see our running results or reproduce it with `yarn test:performance` command.
+
+You can also visit [here](https://js-sdsl.org/#/test/performance-test) to get the result.
+
+## ⌨️ Development
+
+Use Gitpod, a free online dev environment for GitHub.
+
+[![Open in Gippod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/js-sdsl/js-sdsl)
+
+Or clone locally:
+
+```bash
+$ git clone https://github.com/js-sdsl/js-sdsl.git
+$ cd js-sdsl
+$ npm install
+$ npm run dev   # development mode
+```
+
+Then you can see the output in `dist/cjs` folder.
+
+## 🤝 Contributing
+
+Feel free to dive in! Open an issue or submit PRs. It may be helpful to read the [Contributor Guide](https://github.com/js-sdsl/js-sdsl/blob/main/.github/CONTRIBUTING.md).
+
+### Contributors
+
+Thanks goes to these wonderful people:
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tbody>
+    <tr>
+      <td align="center"><a href="https://www.linkedin.com/in/takatoshi-kondo-02a91410/"><img src="https://avatars.githubusercontent.com/u/275959?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Takatoshi Kondo</b></sub></a><br /><a href="https://github.com/js-sdsl/js-sdsl/commits?author=redboltz" title="Code">💻</a> <a href="https://github.com/js-sdsl/js-sdsl/commits?author=redboltz" title="Tests">⚠️</a></td>
+      <td align="center"><a href="https://www.youtube.com/c/noname0310"><img src="https://avatars.githubusercontent.com/u/48761044?v=4?s=100" width="100px;" alt=""/><br /><sub><b>noname</b></sub></a><br /><a href="https://github.com/js-sdsl/js-sdsl/commits?author=noname0310" title="Code">💻</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!
+
+## ❤️ Sponsors and Backers
+
+The special thanks to these sponsors or backers because they provided support at a very early stage:
+
+<a href="https://eslint.org/"><img src="https://js-sdsl.org/assets/image/sponsors/eslint-logo-color.png" alt="eslint logo" width="150"></a>
+
+Thanks also give to these sponsors or backers:
+
+[![sponsors](https://opencollective.com/js-sdsl/tiers/sponsors.svg?avatarHeight=36)](https://opencollective.com/js-sdsl#support)
+
+[![backers](https://opencollective.com/js-sdsl/tiers/backers.svg?avatarHeight=36)](https://opencollective.com/js-sdsl#support)
+
+## 🪪 License
+
+[MIT](https://github.com/js-sdsl/js-sdsl/blob/main/LICENSE) © [ZLY201](https://github.com/zly201)
+
+[stack-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/OtherContainer/Stack.ts
+[stack-npm-version]: https://img.shields.io/npm/v/@js-sdsl/stack
+[stack-npm-link]: https://www.npmjs.com/package/@js-sdsl/stack
+[stack-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/stack/dist/umd/stack.min.js?compression=gzip&style=flat-square/
+[stack-umd-link]: https://unpkg.com/@js-sdsl/stack/dist/umd/stack.min.js
+[stack-docs]: https://js-sdsl.org/js-sdsl/classes/Stack.html
+
+[queue-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/OtherContainer/Queue.ts
+[queue-npm-version]: https://img.shields.io/npm/v/@js-sdsl/queue
+[queue-npm-link]: https://www.npmjs.com/package/@js-sdsl/queue
+[queue-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/queue/dist/umd/queue.min.js?compression=gzip&style=flat-square/
+[queue-umd-link]: https://unpkg.com/@js-sdsl/queue/dist/umd/queue.min.js
+[queue-docs]: https://js-sdsl.org/js-sdsl/classes/Queue.html
+
+[priority-queue-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/OtherContainer/PriorityQueue.ts
+[priority-queue-npm-version]: https://img.shields.io/npm/v/@js-sdsl/priority-queue
+[priority-queue-npm-link]: https://www.npmjs.com/package/@js-sdsl/priority-queue
+[priority-queue-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/priority-queue/dist/umd/priority-queue.min.js?compression=gzip&style=flat-square/
+[priority-queue-umd-link]: https://unpkg.com/@js-sdsl/priority-queue/dist/umd/priority-queue.min.js
+[priority-queue-docs]: https://js-sdsl.org/js-sdsl/classes/PriorityQueue.html
+
+[vector-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/SequentialContainer/Vector.ts
+[vector-npm-version]: https://img.shields.io/npm/v/@js-sdsl/vector
+[vector-npm-link]: https://www.npmjs.com/package/@js-sdsl/vector
+[vector-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/vector/dist/umd/vector.min.js?compression=gzip&style=flat-square/
+[vector-umd-link]: https://unpkg.com/@js-sdsl/vector/dist/umd/vector.min.js
+[vector-docs]: https://js-sdsl.org/js-sdsl/classes/Vector.html
+
+[link-list-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/SequentialContainer/LinkList.ts
+[link-list-npm-version]: https://img.shields.io/npm/v/@js-sdsl/link-list
+[link-list-npm-link]: https://www.npmjs.com/package/@js-sdsl/link-list
+[link-list-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/link-list/dist/umd/link-list.min.js?compression=gzip&style=flat-square/
+[link-list-umd-link]: https://unpkg.com/@js-sdsl/link-list/dist/umd/link-list.min.js
+[link-list-docs]: https://js-sdsl.org/js-sdsl/classes/LinkList.html
+
+[deque-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/SequentialContainer/Deque.ts
+[deque-npm-version]: https://img.shields.io/npm/v/@js-sdsl/deque
+[deque-npm-link]: https://www.npmjs.com/package/@js-sdsl/deque
+[deque-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/deque/dist/umd/deque.min.js?compression=gzip&style=flat-square/
+[deque-umd-link]: https://unpkg.com/@js-sdsl/deque/dist/umd/deque.min.js
+[deque-docs]: https://js-sdsl.org/js-sdsl/classes/Deque.html
+
+[ordered-set-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/TreeContainer/OrderedSet.ts
+[ordered-set-npm-version]: https://img.shields.io/npm/v/@js-sdsl/ordered-set
+[ordered-set-npm-link]: https://www.npmjs.com/package/@js-sdsl/ordered-set
+[ordered-set-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/ordered-set/dist/umd/ordered-set.min.js?compression=gzip&style=flat-square/
+[ordered-set-umd-link]: https://unpkg.com/@js-sdsl/ordered-set/dist/umd/ordered-set.min.js
+[ordered-set-docs]: https://js-sdsl.org/js-sdsl/classes/OrderedSet.html
+
+[ordered-map-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/TreeContainer/OrderedMap.ts
+[ordered-map-npm-version]: https://img.shields.io/npm/v/@js-sdsl/ordered-map
+[ordered-map-npm-link]: https://www.npmjs.com/package/@js-sdsl/ordered-map
+[ordered-map-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/ordered-map/dist/umd/ordered-map.min.js?compression=gzip&style=flat-square/
+[ordered-map-umd-link]: https://unpkg.com/@js-sdsl/ordered-map/dist/umd/ordered-map.min.js
+[ordered-map-docs]: https://js-sdsl.org/js-sdsl/classes/OrderedMap.html
+
+[hash-set-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/HashContainer/HashSet.ts
+[hash-set-npm-version]: https://img.shields.io/npm/v/@js-sdsl/hash-set
+[hash-set-npm-link]: https://www.npmjs.com/package/@js-sdsl/hash-set
+[hash-set-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/hash-set/dist/umd/hash-set.min.js?compression=gzip&style=flat-square/
+[hash-set-umd-link]: https://unpkg.com/@js-sdsl/hash-set/dist/umd/hash-set.min.js
+[hash-set-docs]: https://js-sdsl.org/js-sdsl/classes/HashSet.html
+
+[hash-map-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/HashContainer/HashMap.ts
+[hash-map-npm-version]: https://img.shields.io/npm/v/@js-sdsl/hash-map
+[hash-map-npm-link]: https://www.npmjs.com/package/@js-sdsl/hash-map
+[hash-map-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/hash-map/dist/umd/hash-map.min.js?compression=gzip&style=flat-square/
+[hash-map-umd-link]: https://unpkg.com/@js-sdsl/hash-map/dist/umd/hash-map.min.js
+[hash-map-docs]: https://js-sdsl.org/js-sdsl/classes/HashMap.html
diff --git a/mqtt-backend/node_modules/js-sdsl/README.zh-CN.md b/mqtt-backend/node_modules/js-sdsl/README.zh-CN.md
new file mode 100644
index 0000000..72b92ee
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/README.zh-CN.md
@@ -0,0 +1,298 @@
+<p align="center">
+  <a href="https://js-sdsl.org/" target="_blank" rel="noopener noreferrer">
+    <img src="https://js-sdsl.org/assets/image/logo/logo-removebg.png" alt="js-sdsl logo" width="120" />
+  </a>
+</p>
+
+<h3><p align="center">一款参考 C++ STL 实现的 JavaScript 标准数据结构库</p></h3>
+
+<p align="center">
+  <a href="https://www.npmjs.com/package/js-sdsl"><img src="https://img.shields.io/npm/v/js-sdsl.svg" alt="NPM Version" /></a>
+  <a href="https://github.com/js-sdsl/js-sdsl/actions/workflows/build.yml"><img src="https://img.shields.io/github/actions/workflow/status/js-sdsl/js-sdsl/build.yml" alt="Build Status" /></a>
+  <a href='https://coveralls.io/github/js-sdsl/js-sdsl?branch=main'><img src='https://coveralls.io/repos/github/js-sdsl/js-sdsl/badge.svg?branch=main' alt='Coverage Status' /></a>
+  <a href="https://github.com/js-sdsl/js-sdsl"><img src="https://img.shields.io/github/stars/js-sdsl/js-sdsl.svg" alt="GITHUB Star" /></a>
+  <a href="https://npmcharts.com/compare/js-sdsl?minimal=true"><img src="https://img.shields.io/npm/dm/js-sdsl.svg" alt="NPM Downloads" /></a>
+  <a href="https://unpkg.com/js-sdsl/dist/umd/js-sdsl.min.js"><img src="https://img.badgesize.io/https://unpkg.com/js-sdsl/dist/umd/js-sdsl.min.js?compression=gzip&style=flat-square/" alt="Gzip Size"></a>
+  <a href="https://openbase.com/js/js-sdsl?utm_source=embedded&amp;utm_medium=badge&amp;utm_campaign=rate-badge"><img src="https://badges.openbase.com/js/rating/js-sdsl.svg?token=fh3LMNOV+JSWykSjtg1rA8kouSYkJoIDzGbvaByq5X0=" alt="Rate this package"/></a>
+  <a href="https://opensource.org/licenses/MIT"><img src="https://img.shields.io/npm/l/js-sdsl.svg" alt="MIT-license" /></a>
+  <a href="https://github.com/js-sdsl/js-sdsl/"><img src="https://img.shields.io/github/languages/top/js-sdsl/js-sdsl.svg" alt="GITHUB-language" /></a>
+</p>
+
+<p align="center"><a href="https://github.com/js-sdsl/js-sdsl/blob/main/README.md">English</a> | 简体中文</p>
+
+## ✨ 包含的数据结构
+
+- **Stack** - 先进后出的堆栈
+- **Queue** - 先进先出的队列
+- **PriorityQueue** - 堆实现的优先级队列
+- **Vector** - 受保护的数组，不能直接操作像 `length` 这样的属性
+- **LinkList** - 非连续内存地址的链表
+- **Deque** - 双端队列，向前和向后插入元素或按索引获取元素的时间复杂度为 O(1)
+- **OrderedSet** - 由红黑树实现的排序集合
+- **OrderedMap** - 由红黑树实现的排序字典
+- **HashSet** - 参考 [ES6 Set polyfill](https://github.com/rousan/collections-es6) 实现的哈希集合
+- **HashMap** - 参考 [ES6 Set polyfill](https://github.com/rousan/collections-es6) 实现的哈希字典
+
+## ⚔️ 基准测试
+
+我们和其他数据结构库进行了基准测试，在某些场景我们甚至超过了当前最流行的库
+
+查看 [benchmark](https://js-sdsl.org/#/zh-cn/test/benchmark-analyze) 以获取更多信息
+
+## 🖥 支持的平台
+
+<table>
+  <tr align="center">
+    <td>
+      <img alt="IE / Edge" src="https://js-sdsl.org/assets/image/platform/edge.png" />
+      <div>IE / Edge</div>
+    </td>
+    <td>
+      <img alt="Firefox" src="https://js-sdsl.org/assets/image/platform/firefox.png" />
+      <div>Firefox</div>
+    </td>
+    <td>
+      <img alt="Chrome" src="https://js-sdsl.org/assets/image/platform/chrome.png" />
+      <div>Chrome</div>
+    </td>
+    <td>
+      <img alt="Safari" src="https://js-sdsl.org/assets/image/platform/safari.png" />
+      <div>Safari</div>
+    </td>
+    <td>
+      <img alt="Opera" src="https://js-sdsl.org/assets/image/platform/opera.png" />
+      <div>Opera</div>
+    </td>
+    <td>
+      <img alt="NodeJs" src="https://js-sdsl.org/assets/image/platform/nodejs.png" />
+      <div>NodeJs</div>
+    </td>
+  </tr>
+  <tr align="center">
+    <td>Edge 12</td>
+    <td>31</td>
+    <td>49</td>
+    <td>10</td>
+    <td>36</td>
+    <td>10</td>
+  </tr>
+</table>
+
+## 📦 下载
+
+使用 cdn 直接引入
+
+- [js-sdsl.js](https://unpkg.com/js-sdsl/dist/umd/js-sdsl.js) (for development)
+- [js-sdsl.min.js](https://unpkg.com/js-sdsl/dist/umd/js-sdsl.min.js) (for production)
+
+使用 npm 下载
+
+```bash
+npm install js-sdsl
+```
+
+或者根据需要安装以下任意单个包
+
+| package                                           | npm                                                                   | size                                                             | docs                        |
+|---------------------------------------------------|-----------------------------------------------------------------------|------------------------------------------------------------------|-----------------------------|
+| [@js-sdsl/stack][stack-package]                   | [![NPM Package][stack-npm-version]][stack-npm-link]                   | [![GZIP Size][stack-umd-size]][stack-umd-link]                   | [link][stack-docs]          |
+| [@js-sdsl/queue][queue-package]                   | [![NPM Package][queue-npm-version]][queue-npm-link]                   | [![GZIP Size][queue-umd-size]][queue-umd-link]                   | [link][queue-docs]          |
+| [@js-sdsl/priority-queue][priority-queue-package] | [![NPM Package][priority-queue-npm-version]][priority-queue-npm-link] | [![GZIP Size][priority-queue-umd-size]][priority-queue-umd-link] | [link][priority-queue-docs] |
+| [@js-sdsl/vector][vector-package]                 | [![NPM Package][vector-npm-version]][vector-npm-link]                 | [![GZIP Size][vector-umd-size]][vector-umd-link]                 | [link][vector-docs]         |
+| [@js-sdsl/link-list][link-list-package]           | [![NPM Package][link-list-npm-version]][link-list-npm-link]           | [![GZIP Size][link-list-umd-size]][link-list-umd-link]           | [link][link-list-docs]      |
+| [@js-sdsl/deque][deque-package]                   | [![NPM Package][deque-npm-version]][deque-npm-link]                   | [![GZIP Size][deque-umd-size]][deque-umd-link]                   | [link][deque-docs]          |
+| [@js-sdsl/ordered-set][ordered-set-package]       | [![NPM Package][ordered-set-npm-version]][ordered-set-npm-link]       | [![GZIP Size][ordered-set-umd-size]][ordered-set-umd-link]       | [link][ordered-set-docs]    |
+| [@js-sdsl/ordered-map][ordered-map-package]       | [![NPM Package][ordered-map-npm-version]][ordered-map-npm-link]       | [![GZIP Size][ordered-map-umd-size]][ordered-map-umd-link]       | [link][ordered-map-docs]    |
+| [@js-sdsl/hash-set][hash-set-package]             | [![NPM Package][hash-set-npm-version]][hash-set-npm-link]             | [![GZIP Size][hash-set-umd-size]][hash-set-umd-link]             | [link][hash-set-docs]       |
+| [@js-sdsl/hash-map][hash-map-package]             | [![NPM Package][hash-map-npm-version]][hash-map-npm-link]             | [![GZIP Size][hash-map-umd-size]][hash-map-umd-link]             | [link][hash-map-docs]       |
+
+## 🪒 使用说明
+
+您可以[访问我们的主页](https://js-sdsl.org/)获取更多信息
+
+并且我们提供了完整的 [API 文档](https://js-sdsl.org/js-sdsl/index.html)供您参考
+
+想要查看从前版本的文档，请访问：
+
+`https://js-sdsl.org/js-sdsl/previous/v${version}/index.html`
+
+例如：
+
+[https://js-sdsl.org/js-sdsl/previous/v4.1.5/index.html](https://js-sdsl.org/js-sdsl/previous/v4.1.5/index.html)
+
+### 在浏览器中使用
+
+```html
+<script src="https://unpkg.com/js-sdsl/dist/umd/js-sdsl.min.js"></script>
+<script>
+    const { 
+      Vector,
+      Stack,
+      Queue,
+      LinkList,
+      Deque,
+      PriorityQueue,
+      OrderedSet,
+      OrderedMap,
+      HashSet,
+      HashMap
+    } = sdsl;
+    const myOrderedMap = new OrderedMap();
+    myOrderedMap.setElement(1, 2);
+    console.log(myOrderedMap.getElementByKey(1)); // 2
+</script>
+```
+
+### npm 引入
+
+```javascript
+// esModule
+import { OrderedMap } from 'js-sdsl';
+// commonJs
+const { OrderedMap } = require('js-sdsl');
+const myOrderedMap = new OrderedMap();
+myOrderedMap.setElement(1, 2);
+console.log(myOrderedMap.getElementByKey(1)); // 2
+```
+
+## 🛠 测试
+
+### 单元测试
+
+我们使用 [karma](https://karma-runner.github.io/) 和 [mocha](https://mochajs.org/) 框架进行单元测试，并同步到 [coveralls](https://coveralls.io/github/js-sdsl/js-sdsl) 上，你可以使用 `yarn test:unit` 命令来重建它
+
+### 对于性能的校验
+
+我们对于编写的所有 API 进行了性能测试，并将结果同步到了 [`gh-pages/performance.md`](https://github.com/js-sdsl/js-sdsl/blob/gh-pages/performance.md) 中，你可以通过 `yarn test:performance` 命令来重现它
+
+您也可以访问[我们的网站](https://js-sdsl.org/#/zh-cn/test/performance-test)来获取结果
+
+## ⌨️ 开发
+
+可以使用 Gitpod 进行在线编辑：
+
+[![Open in Gippod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/js-sdsl/js-sdsl)
+
+或者在本地使用以下命令获取源码进行开发：
+
+```bash
+$ git clone https://github.com/js-sdsl/js-sdsl.git
+$ cd js-sdsl
+$ npm install
+$ npm run dev   # development mode
+```
+
+之后您在 `dist/cjs` 文件夹中可以看到在 `dev` 模式下打包生成的产物
+
+## 🤝 贡献
+
+我们欢迎所有的开发人员提交 issue 或 pull request，阅读[贡献者指南](https://github.com/js-sdsl/js-sdsl/blob/main/.github/CONTRIBUTING.md)可能会有所帮助
+
+### 贡献者
+
+感谢对本项目做出贡献的开发者们：
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tbody>
+    <tr>
+      <td align="center"><a href="https://www.linkedin.com/in/takatoshi-kondo-02a91410/"><img src="https://avatars.githubusercontent.com/u/275959?v=4?s=100" width="100px;" alt=""/><br /><sub><b>Takatoshi Kondo</b></sub></a><br /><a href="https://github.com/js-sdsl/js-sdsl/commits?author=redboltz" title="Code">💻</a> <a href="https://github.com/js-sdsl/js-sdsl/commits?author=redboltz" title="Tests">⚠️</a></td>
+      <td align="center"><a href="https://www.youtube.com/c/noname0310"><img src="https://avatars.githubusercontent.com/u/48761044?v=4?s=100" width="100px;" alt=""/><br /><sub><b>noname</b></sub></a><br /><a href="https://github.com/js-sdsl/js-sdsl/commits?author=noname0310" title="Code">💻</a></td>
+    </tr>
+  </tbody>
+</table>
+
+<!-- markdownlint-restore -->
+<!-- prettier-ignore-end -->
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+本项目遵循 [all-contributors](https://github.com/all-contributors/all-contributors) 规范。 欢迎任何形式的贡献！
+
+## ❤️ 赞助者
+
+特别鸣谢下列赞助商和支持者们，他们在非常早期的时候为我们提供了支持：
+
+<a href="https://eslint.org/"><img src="https://js-sdsl.org/assets/image/sponsors/eslint-logo-color.png" alt="eslint logo" width="150"></a>
+
+同样感谢这些赞助商和支持者们：
+
+[![sponsors](https://opencollective.com/js-sdsl/tiers/sponsors.svg?avatarHeight=36)](https://opencollective.com/js-sdsl#support)
+
+[![backers](https://opencollective.com/js-sdsl/tiers/backers.svg?avatarHeight=36)](https://opencollective.com/js-sdsl#support)
+
+## 🪪 许可证
+
+[MIT](https://github.com/js-sdsl/js-sdsl/blob/main/LICENSE) © [ZLY201](https://github.com/zly201)
+
+[stack-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/OtherContainer/Stack.ts
+[stack-npm-version]: https://img.shields.io/npm/v/@js-sdsl/stack
+[stack-npm-link]: https://www.npmjs.com/package/@js-sdsl/stack
+[stack-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/stack/dist/umd/stack.min.js?compression=gzip&style=flat-square/
+[stack-umd-link]: https://unpkg.com/@js-sdsl/stack/dist/umd/stack.min.js
+[stack-docs]: https://js-sdsl.org/js-sdsl/classes/Stack.html
+
+[queue-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/OtherContainer/Queue.ts
+[queue-npm-version]: https://img.shields.io/npm/v/@js-sdsl/queue
+[queue-npm-link]: https://www.npmjs.com/package/@js-sdsl/queue
+[queue-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/queue/dist/umd/queue.min.js?compression=gzip&style=flat-square/
+[queue-umd-link]: https://unpkg.com/@js-sdsl/queue/dist/umd/queue.min.js
+[queue-docs]: https://js-sdsl.org/js-sdsl/classes/Queue.html
+
+[priority-queue-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/OtherContainer/PriorityQueue.ts
+[priority-queue-npm-version]: https://img.shields.io/npm/v/@js-sdsl/priority-queue
+[priority-queue-npm-link]: https://www.npmjs.com/package/@js-sdsl/priority-queue
+[priority-queue-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/priority-queue/dist/umd/priority-queue.min.js?compression=gzip&style=flat-square/
+[priority-queue-umd-link]: https://unpkg.com/@js-sdsl/priority-queue/dist/umd/priority-queue.min.js
+[priority-queue-docs]: https://js-sdsl.org/js-sdsl/classes/PriorityQueue.html
+
+[vector-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/SequentialContainer/Vector.ts
+[vector-npm-version]: https://img.shields.io/npm/v/@js-sdsl/vector
+[vector-npm-link]: https://www.npmjs.com/package/@js-sdsl/vector
+[vector-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/vector/dist/umd/vector.min.js?compression=gzip&style=flat-square/
+[vector-umd-link]: https://unpkg.com/@js-sdsl/vector/dist/umd/vector.min.js
+[vector-docs]: https://js-sdsl.org/js-sdsl/classes/Vector.html
+
+[link-list-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/SequentialContainer/LinkList.ts
+[link-list-npm-version]: https://img.shields.io/npm/v/@js-sdsl/link-list
+[link-list-npm-link]: https://www.npmjs.com/package/@js-sdsl/link-list
+[link-list-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/link-list/dist/umd/link-list.min.js?compression=gzip&style=flat-square/
+[link-list-umd-link]: https://unpkg.com/@js-sdsl/link-list/dist/umd/link-list.min.js
+[link-list-docs]: https://js-sdsl.org/js-sdsl/classes/LinkList.html
+
+[deque-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/SequentialContainer/Deque.ts
+[deque-npm-version]: https://img.shields.io/npm/v/@js-sdsl/deque
+[deque-npm-link]: https://www.npmjs.com/package/@js-sdsl/deque
+[deque-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/deque/dist/umd/deque.min.js?compression=gzip&style=flat-square/
+[deque-umd-link]: https://unpkg.com/@js-sdsl/deque/dist/umd/deque.min.js
+[deque-docs]: https://js-sdsl.org/js-sdsl/classes/Deque.html
+
+[ordered-set-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/TreeContainer/OrderedSet.ts
+[ordered-set-npm-version]: https://img.shields.io/npm/v/@js-sdsl/ordered-set
+[ordered-set-npm-link]: https://www.npmjs.com/package/@js-sdsl/ordered-set
+[ordered-set-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/ordered-set/dist/umd/ordered-set.min.js?compression=gzip&style=flat-square/
+[ordered-set-umd-link]: https://unpkg.com/@js-sdsl/ordered-set/dist/umd/ordered-set.min.js
+[ordered-set-docs]: https://js-sdsl.org/js-sdsl/classes/OrderedSet.html
+
+[ordered-map-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/TreeContainer/OrderedMap.ts
+[ordered-map-npm-version]: https://img.shields.io/npm/v/@js-sdsl/ordered-map
+[ordered-map-npm-link]: https://www.npmjs.com/package/@js-sdsl/ordered-map
+[ordered-map-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/ordered-map/dist/umd/ordered-map.min.js?compression=gzip&style=flat-square/
+[ordered-map-umd-link]: https://unpkg.com/@js-sdsl/ordered-map/dist/umd/ordered-map.min.js
+[ordered-map-docs]: https://js-sdsl.org/js-sdsl/classes/OrderedMap.html
+
+[hash-set-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/HashContainer/HashSet.ts
+[hash-set-npm-version]: https://img.shields.io/npm/v/@js-sdsl/hash-set
+[hash-set-npm-link]: https://www.npmjs.com/package/@js-sdsl/hash-set
+[hash-set-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/hash-set/dist/umd/hash-set.min.js?compression=gzip&style=flat-square/
+[hash-set-umd-link]: https://unpkg.com/@js-sdsl/hash-set/dist/umd/hash-set.min.js
+[hash-set-docs]: https://js-sdsl.org/js-sdsl/classes/HashSet.html
+
+[hash-map-package]: https://github.com/js-sdsl/js-sdsl/blob/main/src/container/HashContainer/HashMap.ts
+[hash-map-npm-version]: https://img.shields.io/npm/v/@js-sdsl/hash-map
+[hash-map-npm-link]: https://www.npmjs.com/package/@js-sdsl/hash-map
+[hash-map-umd-size]: https://img.badgesize.io/https://unpkg.com/@js-sdsl/hash-map/dist/umd/hash-map.min.js?compression=gzip&style=flat-square/
+[hash-map-umd-link]: https://unpkg.com/@js-sdsl/hash-map/dist/umd/hash-map.min.js
+[hash-map-docs]: https://js-sdsl.org/js-sdsl/classes/HashMap.html
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/ContainerBase/index.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/ContainerBase/index.d.ts
new file mode 100644
index 0000000..12e1598
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/ContainerBase/index.d.ts
@@ -0,0 +1,206 @@
+/**
+ * @description The iterator type including `NORMAL` and `REVERSE`.
+ */
+export declare const enum IteratorType {
+    NORMAL = 0,
+    REVERSE = 1
+}
+export declare abstract class ContainerIterator<T> {
+    /**
+     * @description The container pointed to by the iterator.
+     */
+    abstract readonly container: Container<T>;
+    /**
+     * @description Iterator's type.
+     * @example
+     * console.log(container.end().iteratorType === IteratorType.NORMAL);  // true
+     */
+    readonly iteratorType: IteratorType;
+    /**
+     * @param iter - The other iterator you want to compare.
+     * @returns Whether this equals to obj.
+     * @example
+     * container.find(1).equals(container.end());
+     */
+    equals(iter: ContainerIterator<T>): boolean;
+    /**
+     * @description Pointers to element.
+     * @returns The value of the pointer's element.
+     * @example
+     * const val = container.begin().pointer;
+     */
+    abstract get pointer(): T;
+    /**
+     * @description Set pointer's value (some containers are unavailable).
+     * @param newValue - The new value you want to set.
+     * @example
+     * (<LinkList<number>>container).begin().pointer = 1;
+     */
+    abstract set pointer(newValue: T);
+    /**
+     * @description Move `this` iterator to pre.
+     * @returns The iterator's self.
+     * @example
+     * const iter = container.find(1);  // container = [0, 1]
+     * const pre = iter.pre();
+     * console.log(pre === iter);  // true
+     * console.log(pre.equals(iter));  // true
+     * console.log(pre.pointer, iter.pointer); // 0, 0
+     */
+    abstract pre(): this;
+    /**
+     * @description Move `this` iterator to next.
+     * @returns The iterator's self.
+     * @example
+     * const iter = container.find(1);  // container = [1, 2]
+     * const next = iter.next();
+     * console.log(next === iter);  // true
+     * console.log(next.equals(iter));  // true
+     * console.log(next.pointer, iter.pointer); // 2, 2
+     */
+    abstract next(): this;
+    /**
+     * @description Get a copy of itself.
+     * @returns The copy of self.
+     * @example
+     * const iter = container.find(1);  // container = [1, 2]
+     * const next = iter.copy().next();
+     * console.log(next === iter);  // false
+     * console.log(next.equals(iter));  // false
+     * console.log(next.pointer, iter.pointer); // 2, 1
+     */
+    abstract copy(): ContainerIterator<T>;
+}
+export declare abstract class Base {
+    /**
+     * @returns The size of the container.
+     * @example
+     * const container = new Vector([1, 2]);
+     * console.log(container.length); // 2
+     */
+    get length(): number;
+    /**
+     * @returns The size of the container.
+     * @example
+     * const container = new Vector([1, 2]);
+     * console.log(container.size()); // 2
+     */
+    size(): number;
+    /**
+     * @returns Whether the container is empty.
+     * @example
+     * container.clear();
+     * console.log(container.empty());  // true
+     */
+    empty(): boolean;
+    /**
+     * @description Clear the container.
+     * @example
+     * container.clear();
+     * console.log(container.empty());  // true
+     */
+    abstract clear(): void;
+}
+export declare abstract class Container<T> extends Base {
+    /**
+     * @returns Iterator pointing to the beginning element.
+     * @example
+     * const begin = container.begin();
+     * const end = container.end();
+     * for (const it = begin; !it.equals(end); it.next()) {
+     *   doSomething(it.pointer);
+     * }
+     */
+    abstract begin(): ContainerIterator<T>;
+    /**
+     * @returns Iterator pointing to the super end like c++.
+     * @example
+     * const begin = container.begin();
+     * const end = container.end();
+     * for (const it = begin; !it.equals(end); it.next()) {
+     *   doSomething(it.pointer);
+     * }
+     */
+    abstract end(): ContainerIterator<T>;
+    /**
+     * @returns Iterator pointing to the end element.
+     * @example
+     * const rBegin = container.rBegin();
+     * const rEnd = container.rEnd();
+     * for (const it = rBegin; !it.equals(rEnd); it.next()) {
+     *   doSomething(it.pointer);
+     * }
+     */
+    abstract rBegin(): ContainerIterator<T>;
+    /**
+     * @returns Iterator pointing to the super begin like c++.
+     * @example
+     * const rBegin = container.rBegin();
+     * const rEnd = container.rEnd();
+     * for (const it = rBegin; !it.equals(rEnd); it.next()) {
+     *   doSomething(it.pointer);
+     * }
+     */
+    abstract rEnd(): ContainerIterator<T>;
+    /**
+     * @returns The first element of the container.
+     */
+    abstract front(): T | undefined;
+    /**
+     * @returns The last element of the container.
+     */
+    abstract back(): T | undefined;
+    /**
+     * @param element - The element you want to find.
+     * @returns An iterator pointing to the element if found, or super end if not found.
+     * @example
+     * container.find(1).equals(container.end());
+     */
+    abstract find(element: T): ContainerIterator<T>;
+    /**
+     * @description Iterate over all elements in the container.
+     * @param callback - Callback function like Array.forEach.
+     * @example
+     * container.forEach((element, index) => console.log(element, index));
+     */
+    abstract forEach(callback: (element: T, index: number, container: Container<T>) => void): void;
+    /**
+     * @description Gets the value of the element at the specified position.
+     * @example
+     * const val = container.getElementByPos(-1); // throw a RangeError
+     */
+    abstract getElementByPos(pos: number): T;
+    /**
+     * @description Removes the element at the specified position.
+     * @param pos - The element's position you want to remove.
+     * @returns The container length after erasing.
+     * @example
+     * container.eraseElementByPos(-1); // throw a RangeError
+     */
+    abstract eraseElementByPos(pos: number): number;
+    /**
+     * @description Removes element by iterator and move `iter` to next.
+     * @param iter - The iterator you want to erase.
+     * @returns The next iterator.
+     * @example
+     * container.eraseElementByIterator(container.begin());
+     * container.eraseElementByIterator(container.end()); // throw a RangeError
+     */
+    abstract eraseElementByIterator(iter: ContainerIterator<T>): ContainerIterator<T>;
+    /**
+     * @description Using for `for...of` syntax like Array.
+     * @example
+     * for (const element of container) {
+     *   console.log(element);
+     * }
+     */
+    abstract [Symbol.iterator](): Generator<T, void>;
+}
+/**
+ * @description The initial data type passed in when initializing the container.
+ */
+export declare type initContainer<T> = {
+    size?: number | (() => number);
+    length?: number;
+    forEach: (callback: (el: T) => void) => void;
+};
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/ContainerBase/index.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/ContainerBase/index.js
new file mode 100644
index 0000000..4c8c991
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/ContainerBase/index.js
@@ -0,0 +1,40 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.ContainerIterator = exports.Container = exports.Base = void 0;
+
+class ContainerIterator {
+    constructor(t = 0) {
+        this.iteratorType = t;
+    }
+    equals(t) {
+        return this.o === t.o;
+    }
+}
+
+exports.ContainerIterator = ContainerIterator;
+
+class Base {
+    constructor() {
+        this.i = 0;
+    }
+    get length() {
+        return this.i;
+    }
+    size() {
+        return this.i;
+    }
+    empty() {
+        return this.i === 0;
+    }
+}
+
+exports.Base = Base;
+
+class Container extends Base {}
+
+exports.Container = Container;
+//# sourceMappingURL=index.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/ContainerBase/index.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/ContainerBase/index.js.map
new file mode 100644
index 0000000..bb30fa9
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/ContainerBase/index.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/ContainerBase/index.js","../../src/container/ContainerBase/index.ts"],"names":["Object","defineProperty","exports","value","ContainerIterator","Container","Base","constructor","iteratorType","this","equals","iter","_node","_length","length","size","empty"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,oBAAoBF,QAAQG,YAAYH,QAAQI,YAAY;;ACG9D,MAAgBF;IAkBpBG,YAAsBC,IAAY;QAChCC,KAAKD,eAAeA;ADrBpB;IC6BFE,OAAOC;QACL,OAAOF,KAAKG,MAAUD,EAAKC;ADrB3B;;;ACsEHV,QAAAE,oBAAAA;;AAEK,MAAgBE;IAAtBC;QAKYE,KAAAI,IAAU;AAmCtB;IA5BMC;QACF,OAAOL,KAAKI;ADnEZ;IC2EFE;QACE,OAAON,KAAKI;ADnEZ;IC2EFG;QACE,OAAOP,KAAKI,MAAY;ADnExB;;;AC4EHX,QAAAI,OAAAA;;AAEK,MAAgBD,kBAAqBC;;AAgG1CJ,QAAAG,YAAAA","file":"index.js","sourcesContent":["export class ContainerIterator {\n    /**\n     * @internal\n     */\n    constructor(iteratorType = 0 /* IteratorType.NORMAL */) {\n        this.iteratorType = iteratorType;\n    }\n    /**\n     * @param iter - The other iterator you want to compare.\n     * @returns Whether this equals to obj.\n     * @example\n     * container.find(1).equals(container.end());\n     */\n    equals(iter) {\n        return this._node === iter._node;\n    }\n}\nexport class Base {\n    constructor() {\n        /**\n         * @description Container's size.\n         * @internal\n         */\n        this._length = 0;\n    }\n    /**\n     * @returns The size of the container.\n     * @example\n     * const container = new Vector([1, 2]);\n     * console.log(container.length); // 2\n     */\n    get length() {\n        return this._length;\n    }\n    /**\n     * @returns The size of the container.\n     * @example\n     * const container = new Vector([1, 2]);\n     * console.log(container.size()); // 2\n     */\n    size() {\n        return this._length;\n    }\n    /**\n     * @returns Whether the container is empty.\n     * @example\n     * container.clear();\n     * console.log(container.empty());  // true\n     */\n    empty() {\n        return this._length === 0;\n    }\n}\nexport class Container extends Base {\n}\n","/**\n * @description The iterator type including `NORMAL` and `REVERSE`.\n */\nexport const enum IteratorType {\n  NORMAL = 0,\n  REVERSE = 1\n}\n\nexport abstract class ContainerIterator<T> {\n  /**\n   * @description The container pointed to by the iterator.\n   */\n  abstract readonly container: Container<T>;\n  /**\n   * @internal\n   */\n  abstract _node: unknown;\n  /**\n   * @description Iterator's type.\n   * @example\n   * console.log(container.end().iteratorType === IteratorType.NORMAL);  // true\n   */\n  readonly iteratorType: IteratorType;\n  /**\n   * @internal\n   */\n  protected constructor(iteratorType = IteratorType.NORMAL) {\n    this.iteratorType = iteratorType;\n  }\n  /**\n   * @param iter - The other iterator you want to compare.\n   * @returns Whether this equals to obj.\n   * @example\n   * container.find(1).equals(container.end());\n   */\n  equals(iter: ContainerIterator<T>) {\n    return this._node === iter._node;\n  }\n  /**\n   * @description Pointers to element.\n   * @returns The value of the pointer's element.\n   * @example\n   * const val = container.begin().pointer;\n   */\n  abstract get pointer(): T;\n  /**\n   * @description Set pointer's value (some containers are unavailable).\n   * @param newValue - The new value you want to set.\n   * @example\n   * (<LinkList<number>>container).begin().pointer = 1;\n   */\n  abstract set pointer(newValue: T);\n  /**\n   * @description Move `this` iterator to pre.\n   * @returns The iterator's self.\n   * @example\n   * const iter = container.find(1);  // container = [0, 1]\n   * const pre = iter.pre();\n   * console.log(pre === iter);  // true\n   * console.log(pre.equals(iter));  // true\n   * console.log(pre.pointer, iter.pointer); // 0, 0\n   */\n  abstract pre(): this;\n  /**\n   * @description Move `this` iterator to next.\n   * @returns The iterator's self.\n   * @example\n   * const iter = container.find(1);  // container = [1, 2]\n   * const next = iter.next();\n   * console.log(next === iter);  // true\n   * console.log(next.equals(iter));  // true\n   * console.log(next.pointer, iter.pointer); // 2, 2\n   */\n  abstract next(): this;\n  /**\n   * @description Get a copy of itself.\n   * @returns The copy of self.\n   * @example\n   * const iter = container.find(1);  // container = [1, 2]\n   * const next = iter.copy().next();\n   * console.log(next === iter);  // false\n   * console.log(next.equals(iter));  // false\n   * console.log(next.pointer, iter.pointer); // 2, 1\n   */\n  abstract copy(): ContainerIterator<T>;\n}\n\nexport abstract class Base {\n  /**\n   * @description Container's size.\n   * @internal\n   */\n  protected _length = 0;\n  /**\n   * @returns The size of the container.\n   * @example\n   * const container = new Vector([1, 2]);\n   * console.log(container.length); // 2\n   */\n  get length() {\n    return this._length;\n  }\n  /**\n   * @returns The size of the container.\n   * @example\n   * const container = new Vector([1, 2]);\n   * console.log(container.size()); // 2\n   */\n  size() {\n    return this._length;\n  }\n  /**\n   * @returns Whether the container is empty.\n   * @example\n   * container.clear();\n   * console.log(container.empty());  // true\n   */\n  empty() {\n    return this._length === 0;\n  }\n  /**\n   * @description Clear the container.\n   * @example\n   * container.clear();\n   * console.log(container.empty());  // true\n   */\n  abstract clear(): void;\n}\n\nexport abstract class Container<T> extends Base {\n  /**\n   * @returns Iterator pointing to the beginning element.\n   * @example\n   * const begin = container.begin();\n   * const end = container.end();\n   * for (const it = begin; !it.equals(end); it.next()) {\n   *   doSomething(it.pointer);\n   * }\n   */\n  abstract begin(): ContainerIterator<T>;\n  /**\n   * @returns Iterator pointing to the super end like c++.\n   * @example\n   * const begin = container.begin();\n   * const end = container.end();\n   * for (const it = begin; !it.equals(end); it.next()) {\n   *   doSomething(it.pointer);\n   * }\n   */\n  abstract end(): ContainerIterator<T>;\n  /**\n   * @returns Iterator pointing to the end element.\n   * @example\n   * const rBegin = container.rBegin();\n   * const rEnd = container.rEnd();\n   * for (const it = rBegin; !it.equals(rEnd); it.next()) {\n   *   doSomething(it.pointer);\n   * }\n   */\n  abstract rBegin(): ContainerIterator<T>;\n  /**\n   * @returns Iterator pointing to the super begin like c++.\n   * @example\n   * const rBegin = container.rBegin();\n   * const rEnd = container.rEnd();\n   * for (const it = rBegin; !it.equals(rEnd); it.next()) {\n   *   doSomething(it.pointer);\n   * }\n   */\n  abstract rEnd(): ContainerIterator<T>;\n  /**\n   * @returns The first element of the container.\n   */\n  abstract front(): T | undefined;\n  /**\n   * @returns The last element of the container.\n   */\n  abstract back(): T | undefined;\n  /**\n   * @param element - The element you want to find.\n   * @returns An iterator pointing to the element if found, or super end if not found.\n   * @example\n   * container.find(1).equals(container.end());\n   */\n  abstract find(element: T): ContainerIterator<T>;\n  /**\n   * @description Iterate over all elements in the container.\n   * @param callback - Callback function like Array.forEach.\n   * @example\n   * container.forEach((element, index) => console.log(element, index));\n   */\n  abstract forEach(callback: (element: T, index: number, container: Container<T>) => void): void;\n  /**\n   * @description Gets the value of the element at the specified position.\n   * @example\n   * const val = container.getElementByPos(-1); // throw a RangeError\n   */\n  abstract getElementByPos(pos: number): T;\n  /**\n   * @description Removes the element at the specified position.\n   * @param pos - The element's position you want to remove.\n   * @returns The container length after erasing.\n   * @example\n   * container.eraseElementByPos(-1); // throw a RangeError\n   */\n  abstract eraseElementByPos(pos: number): number;\n  /**\n   * @description Removes element by iterator and move `iter` to next.\n   * @param iter - The iterator you want to erase.\n   * @returns The next iterator.\n   * @example\n   * container.eraseElementByIterator(container.begin());\n   * container.eraseElementByIterator(container.end()); // throw a RangeError\n   */\n  abstract eraseElementByIterator(\n    iter: ContainerIterator<T>\n  ): ContainerIterator<T>;\n  /**\n   * @description Using for `for...of` syntax like Array.\n   * @example\n   * for (const element of container) {\n   *   console.log(element);\n   * }\n   */\n  abstract [Symbol.iterator](): Generator<T, void>;\n}\n\n/**\n * @description The initial data type passed in when initializing the container.\n */\nexport type initContainer<T> = {\n  size?: number | (() => number);\n  length?: number;\n  forEach: (callback: (el: T) => void) => void;\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/Base/index.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/Base/index.d.ts
new file mode 100644
index 0000000..43aa866
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/Base/index.d.ts
@@ -0,0 +1,29 @@
+import { Container, ContainerIterator } from "../../ContainerBase";
+export declare type HashLinkNode<K, V> = {
+    _key: K;
+    _value: V;
+    _pre: HashLinkNode<K, V>;
+    _next: HashLinkNode<K, V>;
+};
+export declare abstract class HashContainerIterator<K, V> extends ContainerIterator<K | [K, V]> {
+    abstract readonly container: HashContainer<K, V>;
+    pre(): this;
+    next(): this;
+}
+export declare abstract class HashContainer<K, V> extends Container<K | [K, V]> {
+    /**
+     * @description Unique symbol used to tag object.
+     */
+    readonly HASH_TAG: symbol;
+    clear(): void;
+    /**
+     * @description Remove the element of the specified key.
+     * @param key - The key you want to remove.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @returns Whether erase successfully.
+     */
+    eraseElementByKey(key: K, isObject?: boolean): boolean;
+    eraseElementByIterator(iter: HashContainerIterator<K, V>): HashContainerIterator<K, V>;
+    eraseElementByPos(pos: number): number;
+}
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/Base/index.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/Base/index.js
new file mode 100644
index 0000000..387cb60
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/Base/index.js
@@ -0,0 +1,188 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.HashContainerIterator = exports.HashContainer = void 0;
+
+var _ContainerBase = require("../../ContainerBase");
+
+var _checkObject = _interopRequireDefault(require("../../../utils/checkObject"));
+
+var _throwError = require("../../../utils/throwError");
+
+function _interopRequireDefault(t) {
+    return t && t.t ? t : {
+        default: t
+    };
+}
+
+class HashContainerIterator extends _ContainerBase.ContainerIterator {
+    constructor(t, e, i) {
+        super(i);
+        this.o = t;
+        this.h = e;
+        if (this.iteratorType === 0) {
+            this.pre = function() {
+                if (this.o.L === this.h) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.L;
+                return this;
+            };
+            this.next = function() {
+                if (this.o === this.h) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.B;
+                return this;
+            };
+        } else {
+            this.pre = function() {
+                if (this.o.B === this.h) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.B;
+                return this;
+            };
+            this.next = function() {
+                if (this.o === this.h) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.L;
+                return this;
+            };
+        }
+    }
+}
+
+exports.HashContainerIterator = HashContainerIterator;
+
+class HashContainer extends _ContainerBase.Container {
+    constructor() {
+        super();
+        this.H = [];
+        this.g = {};
+        this.HASH_TAG = Symbol("@@HASH_TAG");
+        Object.setPrototypeOf(this.g, null);
+        this.h = {};
+        this.h.L = this.h.B = this.p = this._ = this.h;
+    }
+    V(t) {
+        const {L: e, B: i} = t;
+        e.B = i;
+        i.L = e;
+        if (t === this.p) {
+            this.p = i;
+        }
+        if (t === this._) {
+            this._ = e;
+        }
+        this.i -= 1;
+    }
+    M(t, e, i) {
+        if (i === undefined) i = (0, _checkObject.default)(t);
+        let s;
+        if (i) {
+            const i = t[this.HASH_TAG];
+            if (i !== undefined) {
+                this.H[i].l = e;
+                return this.i;
+            }
+            Object.defineProperty(t, this.HASH_TAG, {
+                value: this.H.length,
+                configurable: true
+            });
+            s = {
+                u: t,
+                l: e,
+                L: this._,
+                B: this.h
+            };
+            this.H.push(s);
+        } else {
+            const i = this.g[t];
+            if (i) {
+                i.l = e;
+                return this.i;
+            }
+            s = {
+                u: t,
+                l: e,
+                L: this._,
+                B: this.h
+            };
+            this.g[t] = s;
+        }
+        if (this.i === 0) {
+            this.p = s;
+            this.h.B = s;
+        } else {
+            this._.B = s;
+        }
+        this._ = s;
+        this.h.L = s;
+        return ++this.i;
+    }
+    I(t, e) {
+        if (e === undefined) e = (0, _checkObject.default)(t);
+        if (e) {
+            const e = t[this.HASH_TAG];
+            if (e === undefined) return this.h;
+            return this.H[e];
+        } else {
+            return this.g[t] || this.h;
+        }
+    }
+    clear() {
+        const t = this.HASH_TAG;
+        this.H.forEach((function(e) {
+            delete e.u[t];
+        }));
+        this.H = [];
+        this.g = {};
+        Object.setPrototypeOf(this.g, null);
+        this.i = 0;
+        this.p = this._ = this.h.L = this.h.B = this.h;
+    }
+    eraseElementByKey(t, e) {
+        let i;
+        if (e === undefined) e = (0, _checkObject.default)(t);
+        if (e) {
+            const e = t[this.HASH_TAG];
+            if (e === undefined) return false;
+            delete t[this.HASH_TAG];
+            i = this.H[e];
+            delete this.H[e];
+        } else {
+            i = this.g[t];
+            if (i === undefined) return false;
+            delete this.g[t];
+        }
+        this.V(i);
+        return true;
+    }
+    eraseElementByIterator(t) {
+        const e = t.o;
+        if (e === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+        }
+        this.V(e);
+        return t.next();
+    }
+    eraseElementByPos(t) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        let e = this.p;
+        while (t--) {
+            e = e.B;
+        }
+        this.V(e);
+        return this.i;
+    }
+}
+
+exports.HashContainer = HashContainer;
+//# sourceMappingURL=index.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/Base/index.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/Base/index.js.map
new file mode 100644
index 0000000..7d7c49e
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/Base/index.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/HashContainer/Base/index.js","../../src/container/HashContainer/Base/index.ts"],"names":["Object","defineProperty","exports","value","HashContainerIterator","HashContainer","_ContainerBase","require","_checkObject","_interopRequireDefault","_throwError","obj","__esModule","default","ContainerIterator","constructor","node","header","iteratorType","super","this","_node","_header","pre","_pre","throwIteratorAccessError","next","_next","Container","_objMap","_originMap","HASH_TAG","Symbol","setPrototypeOf","_head","_tail","_eraseNode","L","B","_length","_set","key","isObject","undefined","checkObject","newTail","index","_value","length","configurable","_key","push","_findElementNode","clear","forEach","el","eraseElementByKey","eraseElementByIterator","iter","eraseElementByPos","pos","RangeError"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,wBAAwBF,QAAQG,qBAAqB;;ACL7D,IAAAC,iBAAAC,QAAA;;AACA,IAAAC,eAAAC,uBAAAF,QAAA;;AAEA,IAAAG,cAAAH,QAAA;;AAA8D,SAAAE,uBAAAE;IAAA,OAAAA,KAAAA,EAAAC,IAAAD,IAAA;QAAAE,SAAAF;;AAAA;;AASxD,MAAgBP,8BAAoCU,eAAAA;IAaxDC,YACEC,GACAC,GACAC;QAEAC,MAAMD;QACNE,KAAKC,IAAQL;QACbI,KAAKE,IAAUL;QACf,IAAIG,KAAKF,iBAAY,GAA0B;YAC7CE,KAAKG,MAAM;gBACT,IAAIH,KAAKC,EAAMG,MAASJ,KAAKE,GAAS;qBACpC,GAAAG,YAAAA;ADpBM;gBCsBRL,KAAKC,IAAQD,KAAKC,EAAMG;gBACxB,OAAOJ;ADpBH;YCsBNA,KAAKM,OAAO;gBACV,IAAIN,KAAKC,MAAUD,KAAKE,GAAS;qBAC/B,GAAAG,YAAAA;ADpBM;gBCsBRL,KAAKC,IAAQD,KAAKC,EAAMM;gBACxB,OAAOP;ADpBH;AACJ,eCqBG;YACLA,KAAKG,MAAM;gBACT,IAAIH,KAAKC,EAAMM,MAAUP,KAAKE,GAAS;qBACrC,GAAAG,YAAAA;ADnBM;gBCqBRL,KAAKC,IAAQD,KAAKC,EAAMM;gBACxB,OAAOP;ADnBH;YCqBNA,KAAKM,OAAO;gBACV,IAAIN,KAAKC,MAAUD,KAAKE,GAAS;qBAC/B,GAAAG,YAAAA;ADnBM;gBCqBRL,KAAKC,IAAQD,KAAKC,EAAMG;gBACxB,OAAOJ;ADnBH;AACJ;AACJ;;;ACyBHlB,QAAAE,wBAAAA;;AAEK,MAAgBC,sBAA4BuB,eAAAA;IA4BhDb;QACEI;QAzBQC,KAAAS,IAAgC;QAIhCT,KAAAU,IAAiD,CAAA;QAgBlDV,KAAAW,WAAWC,OAAO;QAMzBhC,OAAOiC,eAAeb,KAAKU,GAAY;QACvCV,KAAKE,IAA8B,CAAA;QACnCF,KAAKE,EAAQE,IAAOJ,KAAKE,EAAQK,IAAQP,KAAKc,IAAQd,KAAKe,IAAQf,KAAKE;ADpCxE;ICyCQc,EAAWpB;QACnB,OAAMqB,GAAEb,GAAIc,GAAEX,KAAUX;QACxBQ,EAAKG,IAAQA;QACbA,EAAMH,IAAOA;QACb,IAAIR,MAASI,KAAKc,GAAO;YACvBd,KAAKc,IAAQP;ADpCX;QCsCJ,IAAIX,MAASI,KAAKe,GAAO;YACvBf,KAAKe,IAAQX;ADpCX;QCsCJJ,KAAKmB,KAAW;ADpChB;ICyCQC,EAAKC,GAAQtC,GAAWuC;QAChC,IAAIA,MAAaC,WAAWD,KAAW,GAAAE,aAAAA,SAAYH;QACnD,IAAII;QACJ,IAAIH,GAAU;YACZ,MAAMI,IAA0CL,EAAKrB,KAAKW;YAC1D,IAAIe,MAAUH,WAAW;gBACvBvB,KAAKS,EAAgBiB,GAAOC,IAAY5C;gBACxC,OAAOiB,KAAKmB;ADnCR;YCqCNvC,OAAOC,eAAewC,GAAKrB,KAAKW,UAAU;gBACxC5B,OAAOiB,KAAKS,EAAQmB;gBACpBC,cAAc;;YAEhBJ,IAAU;gBACRK,GAAMT;gBACNM,GAAW5C;gBACXqB,GAAMJ,KAAKe;gBACXR,GAAOP,KAAKE;;YAEdF,KAAKS,EAAQsB,KAAKN;ADnChB,eCoCG;YACL,MAAM7B,IAAOI,KAAKU,EAA4BW;YAC9C,IAAIzB,GAAM;gBACRA,EAAK+B,IAAY5C;gBACjB,OAAOiB,KAAKmB;ADlCR;YCoCNM,IAAU;gBACRK,GAAMT;gBACNM,GAAW5C;gBACXqB,GAAMJ,KAAKe;gBACXR,GAAOP,KAAKE;;YAEdF,KAAKU,EAA4BW,KAAOI;ADlCtC;QCoCJ,IAAIzB,KAAKmB,MAAY,GAAG;YACtBnB,KAAKc,IAAQW;YACbzB,KAAKE,EAAQK,IAAQkB;ADlCnB,eCmCG;YACLzB,KAAKe,EAAMR,IAAQkB;ADjCjB;QCmCJzB,KAAKe,IAAQU;QACbzB,KAAKE,EAAQE,IAAOqB;QACpB,SAASzB,KAAKmB;ADjCd;ICsCQa,EAAiBX,GAAQC;QACjC,IAAIA,MAAaC,WAAWD,KAAW,GAAAE,aAAAA,SAAYH;QACnD,IAAIC,GAAU;YACZ,MAAMI,IAA0CL,EAAKrB,KAAKW;YAC1D,IAAIe,MAAUH,WAAW,OAAOvB,KAAKE;YACrC,OAAOF,KAAKS,EAAQiB;AD/BlB,eCgCG;YACL,OAAO1B,KAAKU,EAA4BW,MAAQrB,KAAKE;AD9BnD;AACJ;ICgCF+B;QACE,MAAMtB,IAAWX,KAAKW;QACtBX,KAAKS,EAAQyB,SAAQ,SAAUC;mBACYA,EAAGL,EAAMnB;AD9BhD;QCgCJX,KAAKS,IAAU;QACfT,KAAKU,IAAa,CAAA;QAClB9B,OAAOiC,eAAeb,KAAKU,GAAY;QACvCV,KAAKmB,IAAU;QACfnB,KAAKc,IAAQd,KAAKe,IAAQf,KAAKE,EAAQE,IAAOJ,KAAKE,EAAQK,IAAQP,KAAKE;AD9BxE;ICuCFkC,kBAAkBf,GAAQC;QACxB,IAAI1B;QACJ,IAAI0B,MAAaC,WAAWD,KAAW,GAAAE,aAAAA,SAAYH;QACnD,IAAIC,GAAU;YACZ,MAAMI,IAA0CL,EAAKrB,KAAKW;YAC1D,IAAIe,MAAUH,WAAW,OAAO;mBACSF,EAAKrB,KAAKW;YACnDf,IAAOI,KAAKS,EAAQiB;mBACb1B,KAAKS,EAAQiB;AD5BlB,eC6BG;YACL9B,IAAOI,KAAKU,EAA4BW;YACxC,IAAIzB,MAAS2B,WAAW,OAAO;mBACxBvB,KAAKU,EAA4BW;AD1BtC;QC4BJrB,KAAKgB,EAAWpB;QAChB,OAAO;AD1BP;IC4BFyC,uBAAuBC;QACrB,MAAM1C,IAAO0C,EAAKrC;QAClB,IAAIL,MAASI,KAAKE,GAAS;aACzB,GAAAG,YAAAA;AD1BE;QC4BJL,KAAKgB,EAAWpB;QAChB,OAAO0C,EAAKhC;AD1BZ;IC4BFiC,kBAAkBC;QD1BZ,IC2BsBA,IAAG,KAAHA,IAAQxC,KAAKmB,IAAO,GAvN5C;YAAG,MAAS,IAAIsB;AD8Ld;QC0BJ,IAAI7C,IAAOI,KAAKc;QAChB,OAAO0B,KAAO;YACZ5C,IAAOA,EAAKW;ADxBV;QC0BJP,KAAKgB,EAAWpB;QAChB,OAAOI,KAAKmB;ADxBZ;;;AC0BHrC,QAAAG,gBAAAA","file":"index.js","sourcesContent":["import { Container, ContainerIterator } from \"../../ContainerBase\";\nimport checkObject from \"../../../utils/checkObject\";\nimport $checkWithinAccessParams from \"../../../utils/checkParams.macro\";\nimport { throwIteratorAccessError } from \"../../../utils/throwError\";\nexport class HashContainerIterator extends ContainerIterator {\n    /**\n     * @internal\n     */\n    constructor(node, header, iteratorType) {\n        super(iteratorType);\n        this._node = node;\n        this._header = header;\n        if (this.iteratorType === 0 /* IteratorType.NORMAL */) {\n            this.pre = function () {\n                if (this._node._pre === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre;\n                return this;\n            };\n            this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next;\n                return this;\n            };\n        }\n        else {\n            this.pre = function () {\n                if (this._node._next === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next;\n                return this;\n            };\n            this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre;\n                return this;\n            };\n        }\n    }\n}\nexport class HashContainer extends Container {\n    /**\n     * @internal\n     */\n    constructor() {\n        super();\n        /**\n         * @internal\n         */\n        this._objMap = [];\n        /**\n         * @internal\n         */\n        this._originMap = {};\n        /**\n         * @description Unique symbol used to tag object.\n         */\n        this.HASH_TAG = Symbol('@@HASH_TAG');\n        Object.setPrototypeOf(this._originMap, null);\n        this._header = {};\n        this._header._pre = this._header._next = this._head = this._tail = this._header;\n    }\n    /**\n     * @internal\n     */\n    _eraseNode(node) {\n        const { _pre, _next } = node;\n        _pre._next = _next;\n        _next._pre = _pre;\n        if (node === this._head) {\n            this._head = _next;\n        }\n        if (node === this._tail) {\n            this._tail = _pre;\n        }\n        this._length -= 1;\n    }\n    /**\n     * @internal\n     */\n    _set(key, value, isObject) {\n        if (isObject === undefined)\n            isObject = checkObject(key);\n        let newTail;\n        if (isObject) {\n            const index = key[this.HASH_TAG];\n            if (index !== undefined) {\n                this._objMap[index]._value = value;\n                return this._length;\n            }\n            Object.defineProperty(key, this.HASH_TAG, {\n                value: this._objMap.length,\n                configurable: true\n            });\n            newTail = {\n                _key: key,\n                _value: value,\n                _pre: this._tail,\n                _next: this._header\n            };\n            this._objMap.push(newTail);\n        }\n        else {\n            const node = this._originMap[key];\n            if (node) {\n                node._value = value;\n                return this._length;\n            }\n            newTail = {\n                _key: key,\n                _value: value,\n                _pre: this._tail,\n                _next: this._header\n            };\n            this._originMap[key] = newTail;\n        }\n        if (this._length === 0) {\n            this._head = newTail;\n            this._header._next = newTail;\n        }\n        else {\n            this._tail._next = newTail;\n        }\n        this._tail = newTail;\n        this._header._pre = newTail;\n        return ++this._length;\n    }\n    /**\n     * @internal\n     */\n    _findElementNode(key, isObject) {\n        if (isObject === undefined)\n            isObject = checkObject(key);\n        if (isObject) {\n            const index = key[this.HASH_TAG];\n            if (index === undefined)\n                return this._header;\n            return this._objMap[index];\n        }\n        else {\n            return this._originMap[key] || this._header;\n        }\n    }\n    clear() {\n        const HASH_TAG = this.HASH_TAG;\n        this._objMap.forEach(function (el) {\n            delete el._key[HASH_TAG];\n        });\n        this._objMap = [];\n        this._originMap = {};\n        Object.setPrototypeOf(this._originMap, null);\n        this._length = 0;\n        this._head = this._tail = this._header._pre = this._header._next = this._header;\n    }\n    /**\n     * @description Remove the element of the specified key.\n     * @param key - The key you want to remove.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @returns Whether erase successfully.\n     */\n    eraseElementByKey(key, isObject) {\n        let node;\n        if (isObject === undefined)\n            isObject = checkObject(key);\n        if (isObject) {\n            const index = key[this.HASH_TAG];\n            if (index === undefined)\n                return false;\n            delete key[this.HASH_TAG];\n            node = this._objMap[index];\n            delete this._objMap[index];\n        }\n        else {\n            node = this._originMap[key];\n            if (node === undefined)\n                return false;\n            delete this._originMap[key];\n        }\n        this._eraseNode(node);\n        return true;\n    }\n    eraseElementByIterator(iter) {\n        const node = iter._node;\n        if (node === this._header) {\n            throwIteratorAccessError();\n        }\n        this._eraseNode(node);\n        return iter.next();\n    }\n    eraseElementByPos(pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        let node = this._head;\n        while (pos--) {\n            node = node._next;\n        }\n        this._eraseNode(node);\n        return this._length;\n    }\n}\n","import { Container, ContainerIterator, IteratorType } from '@/container/ContainerBase';\nimport checkObject from '@/utils/checkObject';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nexport type HashLinkNode<K, V> = {\n  _key: K,\n  _value: V,\n  _pre: HashLinkNode<K, V>,\n  _next: HashLinkNode<K, V>\n}\n\nexport abstract class HashContainerIterator<K, V> extends ContainerIterator<K | [K, V]> {\n  abstract readonly container: HashContainer<K, V>;\n  /**\n   * @internal\n   */\n  _node: HashLinkNode<K, V>;\n  /**\n   * @internal\n   */\n  protected readonly _header: HashLinkNode<K, V>;\n  /**\n   * @internal\n   */\n  protected constructor(\n    node: HashLinkNode<K, V>,\n    header: HashLinkNode<K, V>,\n    iteratorType?: IteratorType\n  ) {\n    super(iteratorType);\n    this._node = node;\n    this._header = header;\n    if (this.iteratorType === IteratorType.NORMAL) {\n      this.pre = function () {\n        if (this._node._pre === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next;\n        return this;\n      };\n    } else {\n      this.pre = function () {\n        if (this._node._next === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre;\n        return this;\n      };\n    }\n  }\n  // @ts-ignore\n  pre(): this;\n  // @ts-ignore\n  next(): this;\n}\n\nexport abstract class HashContainer<K, V> extends Container<K | [K, V]> {\n  /**\n   * @internal\n   */\n  protected _objMap: HashLinkNode<K, V>[] = [];\n  /**\n   * @internal\n   */\n  protected _originMap: Record<string, HashLinkNode<K, V>> = {};\n  /**\n   * @internal\n   */\n  protected _head: HashLinkNode<K, V>;\n  /**\n   * @internal\n   */\n  protected _tail: HashLinkNode<K, V>;\n  /**\n   * @internal\n   */\n  protected readonly _header: HashLinkNode<K, V>;\n  /**\n   * @description Unique symbol used to tag object.\n   */\n  readonly HASH_TAG = Symbol('@@HASH_TAG');\n  /**\n   * @internal\n   */\n  protected constructor() {\n    super();\n    Object.setPrototypeOf(this._originMap, null);\n    this._header = <HashLinkNode<K, V>>{};\n    this._header._pre = this._header._next = this._head = this._tail = this._header;\n  }\n  /**\n   * @internal\n   */\n  protected _eraseNode(node: HashLinkNode<K, V>) {\n    const { _pre, _next } = node;\n    _pre._next = _next;\n    _next._pre = _pre;\n    if (node === this._head) {\n      this._head = _next;\n    }\n    if (node === this._tail) {\n      this._tail = _pre;\n    }\n    this._length -= 1;\n  }\n  /**\n   * @internal\n   */\n  protected _set(key: K, value?: V, isObject?: boolean) {\n    if (isObject === undefined) isObject = checkObject(key);\n    let newTail;\n    if (isObject) {\n      const index = (<Record<symbol, number>><unknown>key)[this.HASH_TAG];\n      if (index !== undefined) {\n        this._objMap[<number>index]._value = <V>value;\n        return this._length;\n      }\n      Object.defineProperty(key, this.HASH_TAG, {\n        value: this._objMap.length,\n        configurable: true\n      });\n      newTail = {\n        _key: key,\n        _value: <V>value,\n        _pre: this._tail,\n        _next: this._header\n      };\n      this._objMap.push(newTail);\n    } else {\n      const node = this._originMap[<string><unknown>key];\n      if (node) {\n        node._value = <V>value;\n        return this._length;\n      }\n      newTail = {\n        _key: key,\n        _value: <V>value,\n        _pre: this._tail,\n        _next: this._header\n      };\n      this._originMap[<string><unknown>key] = newTail;\n    }\n    if (this._length === 0) {\n      this._head = newTail;\n      this._header._next = newTail;\n    } else {\n      this._tail._next = newTail;\n    }\n    this._tail = newTail;\n    this._header._pre = newTail;\n    return ++this._length;\n  }\n  /**\n   * @internal\n   */\n  protected _findElementNode(key: K, isObject?: boolean) {\n    if (isObject === undefined) isObject = checkObject(key);\n    if (isObject) {\n      const index = (<Record<symbol, number>><unknown>key)[this.HASH_TAG];\n      if (index === undefined) return this._header;\n      return this._objMap[index];\n    } else {\n      return this._originMap[<string><unknown>key] || this._header;\n    }\n  }\n  clear() {\n    const HASH_TAG = this.HASH_TAG;\n    this._objMap.forEach(function (el) {\n      delete (<Record<symbol, number>><unknown>el._key)[HASH_TAG];\n    });\n    this._objMap = [];\n    this._originMap = {};\n    Object.setPrototypeOf(this._originMap, null);\n    this._length = 0;\n    this._head = this._tail = this._header._pre = this._header._next = this._header;\n  }\n  /**\n   * @description Remove the element of the specified key.\n   * @param key - The key you want to remove.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @returns Whether erase successfully.\n   */\n  eraseElementByKey(key: K, isObject?: boolean) {\n    let node;\n    if (isObject === undefined) isObject = checkObject(key);\n    if (isObject) {\n      const index = (<Record<symbol, number>><unknown>key)[this.HASH_TAG];\n      if (index === undefined) return false;\n      delete (<Record<symbol, number>><unknown>key)[this.HASH_TAG];\n      node = this._objMap[index];\n      delete this._objMap[index];\n    } else {\n      node = this._originMap[<string><unknown>key];\n      if (node === undefined) return false;\n      delete this._originMap[<string><unknown>key];\n    }\n    this._eraseNode(node);\n    return true;\n  }\n  eraseElementByIterator(iter: HashContainerIterator<K, V>) {\n    const node = iter._node;\n    if (node === this._header) {\n      throwIteratorAccessError();\n    }\n    this._eraseNode(node);\n    return iter.next();\n  }\n  eraseElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let node = this._head;\n    while (pos--) {\n      node = node._next;\n    }\n    this._eraseNode(node);\n    return this._length;\n  }\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashMap.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashMap.d.ts
new file mode 100644
index 0000000..1b78025
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashMap.d.ts
@@ -0,0 +1,49 @@
+import { initContainer, IteratorType } from "../ContainerBase";
+import { HashContainer, HashContainerIterator, HashLinkNode } from "./Base";
+declare class HashMapIterator<K, V> extends HashContainerIterator<K, V> {
+    readonly container: HashMap<K, V>;
+    constructor(node: HashLinkNode<K, V>, header: HashLinkNode<K, V>, container: HashMap<K, V>, iteratorType?: IteratorType);
+    get pointer(): [K, V];
+    copy(): HashMapIterator<K, V>;
+    equals(iter: HashMapIterator<K, V>): boolean;
+}
+export type { HashMapIterator };
+declare class HashMap<K, V> extends HashContainer<K, V> {
+    constructor(container?: initContainer<[K, V]>);
+    begin(): HashMapIterator<K, V>;
+    end(): HashMapIterator<K, V>;
+    rBegin(): HashMapIterator<K, V>;
+    rEnd(): HashMapIterator<K, V>;
+    front(): [K, V] | undefined;
+    back(): [K, V] | undefined;
+    /**
+     * @description Insert a key-value pair or set value by the given key.
+     * @param key - The key want to insert.
+     * @param value - The value want to set.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @returns The size of container after setting.
+     */
+    setElement(key: K, value: V, isObject?: boolean): number;
+    /**
+     * @description Get the value of the element of the specified key.
+     * @param key - The key want to search.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @example
+     * const val = container.getElementByKey(1);
+     */
+    getElementByKey(key: K, isObject?: boolean): V | undefined;
+    getElementByPos(pos: number): [K, V];
+    /**
+     * @description Check key if exist in container.
+     * @param key - The element you want to search.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @returns An iterator pointing to the element if found, or super end if not found.
+     */
+    find(key: K, isObject?: boolean): HashMapIterator<K, V>;
+    forEach(callback: (element: [K, V], index: number, hashMap: HashMap<K, V>) => void): void;
+    [Symbol.iterator](): Generator<[K, V], void, unknown>;
+}
+export default HashMap;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashMap.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashMap.js
new file mode 100644
index 0000000..7bbae24
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashMap.js
@@ -0,0 +1,125 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _Base = require("./Base");
+
+var _checkObject = _interopRequireDefault(require("../../utils/checkObject"));
+
+var _throwError = require("../../utils/throwError");
+
+function _interopRequireDefault(t) {
+    return t && t.t ? t : {
+        default: t
+    };
+}
+
+class HashMapIterator extends _Base.HashContainerIterator {
+    constructor(t, e, r, s) {
+        super(t, e, s);
+        this.container = r;
+    }
+    get pointer() {
+        if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+        }
+        const t = this;
+        return new Proxy([], {
+            get(e, r) {
+                if (r === "0") return t.o.u; else if (r === "1") return t.o.l;
+            },
+            set(e, r, s) {
+                if (r !== "1") {
+                    throw new TypeError("props must be 1");
+                }
+                t.o.l = s;
+                return true;
+            }
+        });
+    }
+    copy() {
+        return new HashMapIterator(this.o, this.h, this.container, this.iteratorType);
+    }
+}
+
+class HashMap extends _Base.HashContainer {
+    constructor(t = []) {
+        super();
+        const e = this;
+        t.forEach((function(t) {
+            e.setElement(t[0], t[1]);
+        }));
+    }
+    begin() {
+        return new HashMapIterator(this.p, this.h, this);
+    }
+    end() {
+        return new HashMapIterator(this.h, this.h, this);
+    }
+    rBegin() {
+        return new HashMapIterator(this._, this.h, this, 1);
+    }
+    rEnd() {
+        return new HashMapIterator(this.h, this.h, this, 1);
+    }
+    front() {
+        if (this.i === 0) return;
+        return [ this.p.u, this.p.l ];
+    }
+    back() {
+        if (this.i === 0) return;
+        return [ this._.u, this._.l ];
+    }
+    setElement(t, e, r) {
+        return this.M(t, e, r);
+    }
+    getElementByKey(t, e) {
+        if (e === undefined) e = (0, _checkObject.default)(t);
+        if (e) {
+            const e = t[this.HASH_TAG];
+            return e !== undefined ? this.H[e].l : undefined;
+        }
+        const r = this.g[t];
+        return r ? r.l : undefined;
+    }
+    getElementByPos(t) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        let e = this.p;
+        while (t--) {
+            e = e.B;
+        }
+        return [ e.u, e.l ];
+    }
+    find(t, e) {
+        const r = this.I(t, e);
+        return new HashMapIterator(r, this.h, this);
+    }
+    forEach(t) {
+        let e = 0;
+        let r = this.p;
+        while (r !== this.h) {
+            t([ r.u, r.l ], e++, this);
+            r = r.B;
+        }
+    }
+    [Symbol.iterator]() {
+        return function*() {
+            let t = this.p;
+            while (t !== this.h) {
+                yield [ t.u, t.l ];
+                t = t.B;
+            }
+        }.bind(this)();
+    }
+}
+
+var _default = HashMap;
+
+exports.default = _default;
+//# sourceMappingURL=HashMap.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashMap.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashMap.js.map
new file mode 100644
index 0000000..da5e27a
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashMap.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/HashContainer/HashMap.js","../../src/container/HashContainer/HashMap.ts"],"names":["Object","defineProperty","exports","value","default","_Base","require","_checkObject","_interopRequireDefault","_throwError","obj","__esModule","HashMapIterator","HashContainerIterator","constructor","node","header","container","iteratorType","super","this","pointer","_node","_header","throwIteratorAccessError","self","Proxy","get","_","props","_key","_value","set","newValue","TypeError","copy","HashMap","HashContainer","forEach","el","setElement","begin","_head","end","rBegin","_tail","rEnd","front","_length","back","key","isObject","_set","getElementByKey","undefined","checkObject","index","HASH_TAG","_objMap","_originMap","getElementByPos","pos","RangeError","_next","find","_findElementNode","callback","Symbol","iterator","bind","_default"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,eAAe;;ACJvB,IAAAC,QAAAC,QAAA;;AACA,IAAAC,eAAAC,uBAAAF,QAAA;;AAEA,IAAAG,cAAAH,QAAA;;AAA8D,SAAAE,uBAAAE;IAAA,OAAAA,KAAAA,EAAAC,IAAAD,IAAA;QAAAN,SAAAM;;AAAA;;AAE9D,MAAME,wBAA8BC,MAAAA;IAElCC,YACEC,GACAC,GACAC,GACAC;QAEAC,MAAMJ,GAAMC,GAAQE;QACpBE,KAAKH,YAAYA;ADPjB;ICSEI;QACF,IAAID,KAAKE,MAAUF,KAAKG,GAAS;aAC/B,GAAAC,YAAAA;ADPE;QCSJ,MAAMC,IAAOL;QACb,OAAO,IAAIM,MAAuB,IAAI;YACpCC,IAAIC,GAAGC;gBACL,IAAIA,MAAU,KAAK,OAAOJ,EAAKH,EAAMQ,QAChC,IAAID,MAAU,KAAK,OAAOJ,EAAKH,EAAMS;ADLtC;YCONC,IAAIJ,GAAGC,GAAYI;gBACjB,IAAIJ,MAAU,KAAK;oBACjB,MAAM,IAAIK,UAAU;ADLd;gBCORT,EAAKH,EAAMS,IAASE;gBACpB,OAAO;ADLH;;AAER;ICOFE;QACE,OAAO,IAAIvB,gBAAsBQ,KAAKE,GAAOF,KAAKG,GAASH,KAAKH,WAAWG,KAAKF;ADLhF;;;ACaJ,MAAMkB,gBAAsBC,MAAAA;IAC1BvB,YAAYG,IAAmC;QAC7CE;QACA,MAAMM,IAAOL;QACbH,EAAUqB,SAAQ,SAAUC;YAC1Bd,EAAKe,WAAWD,EAAG,IAAIA,EAAG;ADVxB;AACJ;ICYFE;QACE,OAAO,IAAI7B,gBAAsBQ,KAAKsB,GAAOtB,KAAKG,GAASH;ADV3D;ICYFuB;QACE,OAAO,IAAI/B,gBAAsBQ,KAAKG,GAASH,KAAKG,GAASH;ADV7D;ICYFwB;QACE,OAAO,IAAIhC,gBAAsBQ,KAAKyB,GAAOzB,KAAKG,GAASH,MAAI;ADV/D;ICYF0B;QACE,OAAO,IAAIlC,gBAAsBQ,KAAKG,GAASH,KAAKG,GAASH,MAAI;ADVjE;ICYF2B;QACE,IAAI3B,KAAK4B,MAAY,GAAG;QACxB,OAAe,EAAC5B,KAAKsB,EAAMZ,GAAMV,KAAKsB,EAAMX;ADT5C;ICWFkB;QACE,IAAI7B,KAAK4B,MAAY,GAAG;QACxB,OAAe,EAAC5B,KAAKyB,EAAMf,GAAMV,KAAKyB,EAAMd;ADR5C;ICkBFS,WAAWU,GAAQ/C,GAAUgD;QAC3B,OAAO/B,KAAKgC,EAAKF,GAAK/C,GAAOgD;ADR7B;ICkBFE,gBAAgBH,GAAQC;QACtB,IAAIA,MAAaG,WAAWH,KAAW,GAAAI,aAAAA,SAAYL;QACnD,IAAIC,GAAU;YACZ,MAAMK,IAA0CN,EAAK9B,KAAKqC;YAC1D,OAAOD,MAAUF,YAAYlC,KAAKsC,EAAQF,GAAOzB,IAASuB;ADPxD;QCSJ,MAAMvC,IAAOK,KAAKuC,EAA4BT;QAC9C,OAAOnC,IAAOA,EAAKgB,IAASuB;ADP5B;ICSFM,gBAAgBC;QDPV,ICQsBA,IAAG,KAAHA,IAAQzC,KAAK4B,IAAO,GAhG3C;YAAE,MAAU,IAAIc;AD0Ff;QCOJ,IAAI/C,IAAOK,KAAKsB;QAChB,OAAOmB,KAAO;YACZ9C,IAAOA,EAAKgD;ADLV;QCOJ,OAAe,EAAChD,EAAKe,GAAMf,EAAKgB;ADLhC;ICcFiC,KAAKd,GAAQC;QACX,MAAMpC,IAAOK,KAAK6C,EAAiBf,GAAKC;QACxC,OAAO,IAAIvC,gBAAsBG,GAAMK,KAAKG,GAASH;ADLrD;ICOFkB,QAAQ4B;QACN,IAAIV,IAAQ;QACZ,IAAIzC,IAAOK,KAAKsB;QAChB,OAAO3B,MAASK,KAAKG,GAAS;YAC5B2C,EAAiB,EAACnD,EAAKe,GAAMf,EAAKgB,KAASyB,KAASpC;YACpDL,IAAOA,EAAKgD;ADLV;AACJ;ICOF,CAACI,OAAOC;QACN,OAAO;YACL,IAAIrD,IAAOK,KAAKsB;YAChB,OAAO3B,MAASK,KAAKG,GAAS;sBACd,EAACR,EAAKe,GAAMf,EAAKgB;gBAC/BhB,IAAOA,EAAKgD;ADLR;AACJ,UCMFM,KAAKjD,KANA;ADCP;;;ACOH,IAAAkD,WAEclC;;AAAOlC,QAAAE,UAAAkE","file":"HashMap.js","sourcesContent":["import { HashContainer, HashContainerIterator } from \"./Base\";\nimport checkObject from \"../../utils/checkObject\";\nimport $checkWithinAccessParams from \"../../utils/checkParams.macro\";\nimport { throwIteratorAccessError } from \"../../utils/throwError\";\nclass HashMapIterator extends HashContainerIterator {\n    constructor(node, header, container, iteratorType) {\n        super(node, header, iteratorType);\n        this.container = container;\n    }\n    get pointer() {\n        if (this._node === this._header) {\n            throwIteratorAccessError();\n        }\n        const self = this;\n        return new Proxy([], {\n            get(_, props) {\n                if (props === '0')\n                    return self._node._key;\n                else if (props === '1')\n                    return self._node._value;\n            },\n            set(_, props, newValue) {\n                if (props !== '1') {\n                    throw new TypeError('props must be 1');\n                }\n                self._node._value = newValue;\n                return true;\n            }\n        });\n    }\n    copy() {\n        return new HashMapIterator(this._node, this._header, this.container, this.iteratorType);\n    }\n}\nclass HashMap extends HashContainer {\n    constructor(container = []) {\n        super();\n        const self = this;\n        container.forEach(function (el) {\n            self.setElement(el[0], el[1]);\n        });\n    }\n    begin() {\n        return new HashMapIterator(this._head, this._header, this);\n    }\n    end() {\n        return new HashMapIterator(this._header, this._header, this);\n    }\n    rBegin() {\n        return new HashMapIterator(this._tail, this._header, this, 1 /* IteratorType.REVERSE */);\n    }\n    rEnd() {\n        return new HashMapIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    }\n    front() {\n        if (this._length === 0)\n            return;\n        return [this._head._key, this._head._value];\n    }\n    back() {\n        if (this._length === 0)\n            return;\n        return [this._tail._key, this._tail._value];\n    }\n    /**\n     * @description Insert a key-value pair or set value by the given key.\n     * @param key - The key want to insert.\n     * @param value - The value want to set.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @returns The size of container after setting.\n     */\n    setElement(key, value, isObject) {\n        return this._set(key, value, isObject);\n    }\n    /**\n     * @description Get the value of the element of the specified key.\n     * @param key - The key want to search.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @example\n     * const val = container.getElementByKey(1);\n     */\n    getElementByKey(key, isObject) {\n        if (isObject === undefined)\n            isObject = checkObject(key);\n        if (isObject) {\n            const index = key[this.HASH_TAG];\n            return index !== undefined ? this._objMap[index]._value : undefined;\n        }\n        const node = this._originMap[key];\n        return node ? node._value : undefined;\n    }\n    getElementByPos(pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        let node = this._head;\n        while (pos--) {\n            node = node._next;\n        }\n        return [node._key, node._value];\n    }\n    /**\n     * @description Check key if exist in container.\n     * @param key - The element you want to search.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @returns An iterator pointing to the element if found, or super end if not found.\n     */\n    find(key, isObject) {\n        const node = this._findElementNode(key, isObject);\n        return new HashMapIterator(node, this._header, this);\n    }\n    forEach(callback) {\n        let index = 0;\n        let node = this._head;\n        while (node !== this._header) {\n            callback([node._key, node._value], index++, this);\n            node = node._next;\n        }\n    }\n    [Symbol.iterator]() {\n        return function* () {\n            let node = this._head;\n            while (node !== this._header) {\n                yield [node._key, node._value];\n                node = node._next;\n            }\n        }.bind(this)();\n    }\n}\nexport default HashMap;\n","import { initContainer, IteratorType } from '@/container/ContainerBase';\nimport { HashContainer, HashContainerIterator, HashLinkNode } from '@/container/HashContainer/Base';\nimport checkObject from '@/utils/checkObject';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nclass HashMapIterator<K, V> extends HashContainerIterator<K, V> {\n  readonly container: HashMap<K, V>;\n  constructor(\n    node: HashLinkNode<K, V>,\n    header: HashLinkNode<K, V>,\n    container: HashMap<K, V>,\n    iteratorType?: IteratorType\n  ) {\n    super(node, header, iteratorType);\n    this.container = container;\n  }\n  get pointer() {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    const self = this;\n    return new Proxy(<[K, V]><unknown>[], {\n      get(_, props: '0' | '1') {\n        if (props === '0') return self._node._key;\n        else if (props === '1') return self._node._value;\n      },\n      set(_, props: '1', newValue: V) {\n        if (props !== '1') {\n          throw new TypeError('props must be 1');\n        }\n        self._node._value = newValue;\n        return true;\n      }\n    });\n  }\n  copy() {\n    return new HashMapIterator<K, V>(this._node, this._header, this.container, this.iteratorType);\n  }\n  // @ts-ignore\n  equals(iter: HashMapIterator<K, V>): boolean;\n}\n\nexport type { HashMapIterator };\n\nclass HashMap<K, V> extends HashContainer<K, V> {\n  constructor(container: initContainer<[K, V]> = []) {\n    super();\n    const self = this;\n    container.forEach(function (el) {\n      self.setElement(el[0], el[1]);\n    });\n  }\n  begin() {\n    return new HashMapIterator<K, V>(this._head, this._header, this);\n  }\n  end() {\n    return new HashMapIterator<K, V>(this._header, this._header, this);\n  }\n  rBegin() {\n    return new HashMapIterator<K, V>(this._tail, this._header, this, IteratorType.REVERSE);\n  }\n  rEnd() {\n    return new HashMapIterator<K, V>(this._header, this._header, this, IteratorType.REVERSE);\n  }\n  front() {\n    if (this._length === 0) return;\n    return <[K, V]>[this._head._key, this._head._value];\n  }\n  back() {\n    if (this._length === 0) return;\n    return <[K, V]>[this._tail._key, this._tail._value];\n  }\n  /**\n   * @description Insert a key-value pair or set value by the given key.\n   * @param key - The key want to insert.\n   * @param value - The value want to set.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @returns The size of container after setting.\n   */\n  setElement(key: K, value: V, isObject?: boolean) {\n    return this._set(key, value, isObject);\n  }\n  /**\n   * @description Get the value of the element of the specified key.\n   * @param key - The key want to search.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @example\n   * const val = container.getElementByKey(1);\n   */\n  getElementByKey(key: K, isObject?: boolean) {\n    if (isObject === undefined) isObject = checkObject(key);\n    if (isObject) {\n      const index = (<Record<symbol, number>><unknown>key)[this.HASH_TAG];\n      return index !== undefined ? this._objMap[index]._value : undefined;\n    }\n    const node = this._originMap[<string><unknown>key];\n    return node ? node._value : undefined;\n  }\n  getElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let node = this._head;\n    while (pos--) {\n      node = node._next;\n    }\n    return <[K, V]>[node._key, node._value];\n  }\n  /**\n   * @description Check key if exist in container.\n   * @param key - The element you want to search.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @returns An iterator pointing to the element if found, or super end if not found.\n   */\n  find(key: K, isObject?: boolean) {\n    const node = this._findElementNode(key, isObject);\n    return new HashMapIterator<K, V>(node, this._header, this);\n  }\n  forEach(callback: (element: [K, V], index: number, hashMap: HashMap<K, V>) => void) {\n    let index = 0;\n    let node = this._head;\n    while (node !== this._header) {\n      callback(<[K, V]>[node._key, node._value], index++, this);\n      node = node._next;\n    }\n  }\n  [Symbol.iterator]() {\n    return function * (this: HashMap<K, V>) {\n      let node = this._head;\n      while (node !== this._header) {\n        yield <[K, V]>[node._key, node._value];\n        node = node._next;\n      }\n    }.bind(this)();\n  }\n}\n\nexport default HashMap;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashSet.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashSet.d.ts
new file mode 100644
index 0000000..345fe5a
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashSet.d.ts
@@ -0,0 +1,39 @@
+import { initContainer, IteratorType } from "../ContainerBase";
+import { HashContainer, HashContainerIterator, HashLinkNode } from "./Base";
+declare class HashSetIterator<K> extends HashContainerIterator<K, undefined> {
+    readonly container: HashSet<K>;
+    constructor(node: HashLinkNode<K, undefined>, header: HashLinkNode<K, undefined>, container: HashSet<K>, iteratorType?: IteratorType);
+    get pointer(): K;
+    copy(): HashSetIterator<K>;
+    equals(iter: HashSetIterator<K>): boolean;
+}
+export type { HashSetIterator };
+declare class HashSet<K> extends HashContainer<K, undefined> {
+    constructor(container?: initContainer<K>);
+    begin(): HashSetIterator<K>;
+    end(): HashSetIterator<K>;
+    rBegin(): HashSetIterator<K>;
+    rEnd(): HashSetIterator<K>;
+    front(): K | undefined;
+    back(): K | undefined;
+    /**
+     * @description Insert element to set.
+     * @param key - The key want to insert.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @returns The size of container after inserting.
+     */
+    insert(key: K, isObject?: boolean): number;
+    getElementByPos(pos: number): K;
+    /**
+     * @description Check key if exist in container.
+     * @param key - The element you want to search.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @returns An iterator pointing to the element if found, or super end if not found.
+     */
+    find(key: K, isObject?: boolean): HashSetIterator<K>;
+    forEach(callback: (element: K, index: number, container: HashSet<K>) => void): void;
+    [Symbol.iterator](): Generator<K, void, unknown>;
+}
+export default HashSet;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashSet.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashSet.js
new file mode 100644
index 0000000..6c75f33
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashSet.js
@@ -0,0 +1,94 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _Base = require("./Base");
+
+var _throwError = require("../../utils/throwError");
+
+class HashSetIterator extends _Base.HashContainerIterator {
+    constructor(t, e, r, s) {
+        super(t, e, s);
+        this.container = r;
+    }
+    get pointer() {
+        if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+        }
+        return this.o.u;
+    }
+    copy() {
+        return new HashSetIterator(this.o, this.h, this.container, this.iteratorType);
+    }
+}
+
+class HashSet extends _Base.HashContainer {
+    constructor(t = []) {
+        super();
+        const e = this;
+        t.forEach((function(t) {
+            e.insert(t);
+        }));
+    }
+    begin() {
+        return new HashSetIterator(this.p, this.h, this);
+    }
+    end() {
+        return new HashSetIterator(this.h, this.h, this);
+    }
+    rBegin() {
+        return new HashSetIterator(this._, this.h, this, 1);
+    }
+    rEnd() {
+        return new HashSetIterator(this.h, this.h, this, 1);
+    }
+    front() {
+        return this.p.u;
+    }
+    back() {
+        return this._.u;
+    }
+    insert(t, e) {
+        return this.M(t, undefined, e);
+    }
+    getElementByPos(t) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        let e = this.p;
+        while (t--) {
+            e = e.B;
+        }
+        return e.u;
+    }
+    find(t, e) {
+        const r = this.I(t, e);
+        return new HashSetIterator(r, this.h, this);
+    }
+    forEach(t) {
+        let e = 0;
+        let r = this.p;
+        while (r !== this.h) {
+            t(r.u, e++, this);
+            r = r.B;
+        }
+    }
+    [Symbol.iterator]() {
+        return function*() {
+            let t = this.p;
+            while (t !== this.h) {
+                yield t.u;
+                t = t.B;
+            }
+        }.bind(this)();
+    }
+}
+
+var _default = HashSet;
+
+exports.default = _default;
+//# sourceMappingURL=HashSet.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashSet.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashSet.js.map
new file mode 100644
index 0000000..15c7191
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/HashContainer/HashSet.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/HashContainer/HashSet.js","../../src/container/HashContainer/HashSet.ts"],"names":["Object","defineProperty","exports","value","default","_Base","require","_throwError","HashSetIterator","HashContainerIterator","constructor","node","header","container","iteratorType","super","this","pointer","_node","_header","throwIteratorAccessError","_key","copy","HashSet","HashContainer","self","forEach","el","insert","begin","_head","end","rBegin","_tail","rEnd","front","back","key","isObject","_set","undefined","getElementByPos","pos","_length","RangeError","_next","find","_findElementNode","callback","index","Symbol","iterator","bind","_default"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,eAAe;;ACJvB,IAAAC,QAAAC,QAAA;;AAEA,IAAAC,cAAAD,QAAA;;AAEA,MAAME,wBAA2BC,MAAAA;IAE/BC,YACEC,GACAC,GACAC,GACAC;QAEAC,MAAMJ,GAAMC,GAAQE;QACpBE,KAAKH,YAAYA;ADPjB;ICSEI;QACF,IAAID,KAAKE,MAAUF,KAAKG,GAAS;aAC/B,GAAAC,YAAAA;ADPE;QCSJ,OAAOJ,KAAKE,EAAMG;ADPlB;ICSFC;QACE,OAAO,IAAId,gBAAmBQ,KAAKE,GAAOF,KAAKG,GAASH,KAAKH,WAAWG,KAAKF;ADP7E;;;ACeJ,MAAMS,gBAAmBC,MAAAA;IACvBd,YAAYG,IAA8B;QACxCE;QACA,MAAMU,IAAOT;QACbH,EAAUa,SAAQ,SAAUC;YAC1BF,EAAKG,OAAOD;ADZV;AACJ;ICcFE;QACE,OAAO,IAAIrB,gBAAmBQ,KAAKc,GAAOd,KAAKG,GAASH;ADZxD;ICcFe;QACE,OAAO,IAAIvB,gBAAmBQ,KAAKG,GAASH,KAAKG,GAASH;ADZ1D;ICcFgB;QACE,OAAO,IAAIxB,gBAAmBQ,KAAKiB,GAAOjB,KAAKG,GAASH,MAAI;ADZ5D;ICcFkB;QACE,OAAO,IAAI1B,gBAAmBQ,KAAKG,GAASH,KAAKG,GAASH,MAAI;ADZ9D;ICcFmB;QACE,OAAOnB,KAAKc,EAAMT;ADZlB;ICcFe;QACE,OAAOpB,KAAKiB,EAAMZ;ADZlB;ICqBFO,OAAOS,GAAQC;QACb,OAAOtB,KAAKuB,EAAKF,GAAKG,WAAWF;ADZjC;ICcFG,gBAAgBC;QDZV,ICasBA,IAAG,KAAHA,IAAQ1B,KAAK2B,IAAO,GA/DI;YAAE,MAAU,IAChEC;ADmDM;QCYJ,IAAIjC,IAAOK,KAAKc;QAChB,OAAOY,KAAO;YACZ/B,IAAOA,EAAKkC;ADVV;QCYJ,OAAOlC,EAAKU;ADVZ;ICmBFyB,KAAKT,GAAQC;QACX,MAAM3B,IAAOK,KAAK+B,EAAiBV,GAAKC;QACxC,OAAO,IAAI9B,gBAAmBG,GAAMK,KAAKG,GAASH;ADVlD;ICYFU,QAAQsB;QACN,IAAIC,IAAQ;QACZ,IAAItC,IAAOK,KAAKc;QAChB,OAAOnB,MAASK,KAAKG,GAAS;YAC5B6B,EAASrC,EAAKU,GAAM4B,KAASjC;YAC7BL,IAAOA,EAAKkC;ADVV;AACJ;ICYF,CAACK,OAAOC;QACN,OAAO;YACL,IAAIxC,IAAOK,KAAKc;YAChB,OAAOnB,MAASK,KAAKG,GAAS;sBACtBR,EAAKU;gBACXV,IAAOA,EAAKkC;ADVR;AACJ,UCWFO,KAAKpC,KANA;ADJP;;;ACYH,IAAAqC,WAEc9B;;AAAOrB,QAAAE,UAAAiD","file":"HashSet.js","sourcesContent":["import { HashContainer, HashContainerIterator } from \"./Base\";\nimport $checkWithinAccessParams from \"../../utils/checkParams.macro\";\nimport { throwIteratorAccessError } from \"../../utils/throwError\";\nclass HashSetIterator extends HashContainerIterator {\n    constructor(node, header, container, iteratorType) {\n        super(node, header, iteratorType);\n        this.container = container;\n    }\n    get pointer() {\n        if (this._node === this._header) {\n            throwIteratorAccessError();\n        }\n        return this._node._key;\n    }\n    copy() {\n        return new HashSetIterator(this._node, this._header, this.container, this.iteratorType);\n    }\n}\nclass HashSet extends HashContainer {\n    constructor(container = []) {\n        super();\n        const self = this;\n        container.forEach(function (el) {\n            self.insert(el);\n        });\n    }\n    begin() {\n        return new HashSetIterator(this._head, this._header, this);\n    }\n    end() {\n        return new HashSetIterator(this._header, this._header, this);\n    }\n    rBegin() {\n        return new HashSetIterator(this._tail, this._header, this, 1 /* IteratorType.REVERSE */);\n    }\n    rEnd() {\n        return new HashSetIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    }\n    front() {\n        return this._head._key;\n    }\n    back() {\n        return this._tail._key;\n    }\n    /**\n     * @description Insert element to set.\n     * @param key - The key want to insert.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @returns The size of container after inserting.\n     */\n    insert(key, isObject) {\n        return this._set(key, undefined, isObject);\n    }\n    getElementByPos(pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        let node = this._head;\n        while (pos--) {\n            node = node._next;\n        }\n        return node._key;\n    }\n    /**\n     * @description Check key if exist in container.\n     * @param key - The element you want to search.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @returns An iterator pointing to the element if found, or super end if not found.\n     */\n    find(key, isObject) {\n        const node = this._findElementNode(key, isObject);\n        return new HashSetIterator(node, this._header, this);\n    }\n    forEach(callback) {\n        let index = 0;\n        let node = this._head;\n        while (node !== this._header) {\n            callback(node._key, index++, this);\n            node = node._next;\n        }\n    }\n    [Symbol.iterator]() {\n        return function* () {\n            let node = this._head;\n            while (node !== this._header) {\n                yield node._key;\n                node = node._next;\n            }\n        }.bind(this)();\n    }\n}\nexport default HashSet;\n","import { initContainer, IteratorType } from '@/container/ContainerBase';\nimport { HashContainer, HashContainerIterator, HashLinkNode } from '@/container/HashContainer/Base';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nclass HashSetIterator<K> extends HashContainerIterator<K, undefined> {\n  readonly container: HashSet<K>;\n  constructor(\n    node: HashLinkNode<K, undefined>,\n    header: HashLinkNode<K, undefined>,\n    container: HashSet<K>,\n    iteratorType?: IteratorType\n  ) {\n    super(node, header, iteratorType);\n    this.container = container;\n  }\n  get pointer() {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    return this._node._key;\n  }\n  copy() {\n    return new HashSetIterator<K>(this._node, this._header, this.container, this.iteratorType);\n  }\n  // @ts-ignore\n  equals(iter: HashSetIterator<K>): boolean;\n}\n\nexport type { HashSetIterator };\n\nclass HashSet<K> extends HashContainer<K, undefined> {\n  constructor(container: initContainer<K> = []) {\n    super();\n    const self = this;\n    container.forEach(function (el) {\n      self.insert(el);\n    });\n  }\n  begin() {\n    return new HashSetIterator<K>(this._head, this._header, this);\n  }\n  end() {\n    return new HashSetIterator<K>(this._header, this._header, this);\n  }\n  rBegin() {\n    return new HashSetIterator<K>(this._tail, this._header, this, IteratorType.REVERSE);\n  }\n  rEnd() {\n    return new HashSetIterator<K>(this._header, this._header, this, IteratorType.REVERSE);\n  }\n  front(): K | undefined {\n    return this._head._key;\n  }\n  back(): K | undefined {\n    return this._tail._key;\n  }\n  /**\n   * @description Insert element to set.\n   * @param key - The key want to insert.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @returns The size of container after inserting.\n   */\n  insert(key: K, isObject?: boolean) {\n    return this._set(key, undefined, isObject);\n  }\n  getElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let node = this._head;\n    while (pos--) {\n      node = node._next;\n    }\n    return node._key;\n  }\n  /**\n   * @description Check key if exist in container.\n   * @param key - The element you want to search.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @returns An iterator pointing to the element if found, or super end if not found.\n   */\n  find(key: K, isObject?: boolean) {\n    const node = this._findElementNode(key, isObject);\n    return new HashSetIterator<K>(node, this._header, this);\n  }\n  forEach(callback: (element: K, index: number, container: HashSet<K>) => void) {\n    let index = 0;\n    let node = this._head;\n    while (node !== this._header) {\n      callback(node._key, index++, this);\n      node = node._next;\n    }\n  }\n  [Symbol.iterator]() {\n    return function * (this: HashSet<K>) {\n      let node = this._head;\n      while (node !== this._header) {\n        yield node._key;\n        node = node._next;\n      }\n    }.bind(this)();\n  }\n}\n\nexport default HashSet;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/PriorityQueue.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/PriorityQueue.d.ts
new file mode 100644
index 0000000..8937bef
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/PriorityQueue.d.ts
@@ -0,0 +1,79 @@
+import { Base, initContainer } from "../ContainerBase";
+declare class PriorityQueue<T> extends Base {
+    /**
+     * @description PriorityQueue's constructor.
+     * @param container - Initialize container, must have a forEach function.
+     * @param cmp - Compare function.
+     * @param copy - When the container is an array, you can choose to directly operate on the original object of
+     *               the array or perform a shallow copy. The default is shallow copy.
+     * @example
+     * new PriorityQueue();
+     * new PriorityQueue([1, 2, 3]);
+     * new PriorityQueue([1, 2, 3], (x, y) => x - y);
+     * new PriorityQueue([1, 2, 3], (x, y) => x - y, false);
+     */
+    constructor(container?: initContainer<T>, cmp?: (x: T, y: T) => number, copy?: boolean);
+    clear(): void;
+    /**
+     * @description Push element into a container in order.
+     * @param item - The element you want to push.
+     * @returns The size of heap after pushing.
+     * @example
+     * queue.push(1);
+     */
+    push(item: T): void;
+    /**
+     * @description Removes the top element.
+     * @returns The element you popped.
+     * @example
+     * queue.pop();
+     */
+    pop(): T | undefined;
+    /**
+     * @description Accesses the top element.
+     * @example
+     * const top = queue.top();
+     */
+    top(): T | undefined;
+    /**
+     * @description Check if element is in heap.
+     * @param item - The item want to find.
+     * @returns Whether element is in heap.
+     * @example
+     * const que = new PriorityQueue([], (x, y) => x.id - y.id);
+     * const obj = { id: 1 };
+     * que.push(obj);
+     * console.log(que.find(obj));  // true
+     */
+    find(item: T): boolean;
+    /**
+     * @description Remove specified item from heap.
+     * @param item - The item want to remove.
+     * @returns Whether remove success.
+     * @example
+     * const que = new PriorityQueue([], (x, y) => x.id - y.id);
+     * const obj = { id: 1 };
+     * que.push(obj);
+     * que.remove(obj);
+     */
+    remove(item: T): boolean;
+    /**
+     * @description Update item and it's pos in the heap.
+     * @param item - The item want to update.
+     * @returns Whether update success.
+     * @example
+     * const que = new PriorityQueue([], (x, y) => x.id - y.id);
+     * const obj = { id: 1 };
+     * que.push(obj);
+     * obj.id = 2;
+     * que.updateItem(obj);
+     */
+    updateItem(item: T): boolean;
+    /**
+     * @returns Return a copy array of heap.
+     * @example
+     * const arr = queue.toArray();
+     */
+    toArray(): T[];
+}
+export default PriorityQueue;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/PriorityQueue.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/PriorityQueue.js
new file mode 100644
index 0000000..e90fa09
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/PriorityQueue.js
@@ -0,0 +1,118 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _ContainerBase = require("../ContainerBase");
+
+class PriorityQueue extends _ContainerBase.Base {
+    constructor(t = [], s = function(t, s) {
+        if (t > s) return -1;
+        if (t < s) return 1;
+        return 0;
+    }, i = true) {
+        super();
+        this.v = s;
+        if (Array.isArray(t)) {
+            this.C = i ? [ ...t ] : t;
+        } else {
+            this.C = [];
+            const s = this;
+            t.forEach((function(t) {
+                s.C.push(t);
+            }));
+        }
+        this.i = this.C.length;
+        const e = this.i >> 1;
+        for (let t = this.i - 1 >> 1; t >= 0; --t) {
+            this.k(t, e);
+        }
+    }
+    m(t) {
+        const s = this.C[t];
+        while (t > 0) {
+            const i = t - 1 >> 1;
+            const e = this.C[i];
+            if (this.v(e, s) <= 0) break;
+            this.C[t] = e;
+            t = i;
+        }
+        this.C[t] = s;
+    }
+    k(t, s) {
+        const i = this.C[t];
+        while (t < s) {
+            let s = t << 1 | 1;
+            const e = s + 1;
+            let h = this.C[s];
+            if (e < this.i && this.v(h, this.C[e]) > 0) {
+                s = e;
+                h = this.C[e];
+            }
+            if (this.v(h, i) >= 0) break;
+            this.C[t] = h;
+            t = s;
+        }
+        this.C[t] = i;
+    }
+    clear() {
+        this.i = 0;
+        this.C.length = 0;
+    }
+    push(t) {
+        this.C.push(t);
+        this.m(this.i);
+        this.i += 1;
+    }
+    pop() {
+        if (this.i === 0) return;
+        const t = this.C[0];
+        const s = this.C.pop();
+        this.i -= 1;
+        if (this.i) {
+            this.C[0] = s;
+            this.k(0, this.i >> 1);
+        }
+        return t;
+    }
+    top() {
+        return this.C[0];
+    }
+    find(t) {
+        return this.C.indexOf(t) >= 0;
+    }
+    remove(t) {
+        const s = this.C.indexOf(t);
+        if (s < 0) return false;
+        if (s === 0) {
+            this.pop();
+        } else if (s === this.i - 1) {
+            this.C.pop();
+            this.i -= 1;
+        } else {
+            this.C.splice(s, 1, this.C.pop());
+            this.i -= 1;
+            this.m(s);
+            this.k(s, this.i >> 1);
+        }
+        return true;
+    }
+    updateItem(t) {
+        const s = this.C.indexOf(t);
+        if (s < 0) return false;
+        this.m(s);
+        this.k(s, this.i >> 1);
+        return true;
+    }
+    toArray() {
+        return [ ...this.C ];
+    }
+}
+
+var _default = PriorityQueue;
+
+exports.default = _default;
+//# sourceMappingURL=PriorityQueue.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/PriorityQueue.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/PriorityQueue.js.map
new file mode 100644
index 0000000..727c189
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/PriorityQueue.js.map
@@ -0,0 +1 @@
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The default is shallow copy.\n     * @example\n     * new PriorityQueue();\n     * new PriorityQueue([1, 2, 3]);\n     * new PriorityQueue([1, 2, 3], (x, y) => x - y);\n     * new PriorityQueue([1, 2, 3], (x, y) => x - y, false);\n     */\n    constructor(container = [], cmp = function (x, y) {\n        if (x > y)\n            return -1;\n        if (x < y)\n            return 1;\n        return 0;\n    }, copy = true) {\n        super();\n        this._cmp = cmp;\n        if (Array.isArray(container)) {\n            this._priorityQueue = copy ? [...container] : container;\n        }\n        else {\n            this._priorityQueue = [];\n            const self = this;\n            container.forEach(function (el) {\n                self._priorityQueue.push(el);\n            });\n        }\n        this._length = this._priorityQueue.length;\n        const halfLength = this._length >> 1;\n        for (let parent = (this._length - 1) >> 1; parent >= 0; --parent) {\n            this._pushDown(parent, halfLength);\n        }\n    }\n    /**\n     * @internal\n     */\n    _pushUp(pos) {\n        const item = this._priorityQueue[pos];\n        while (pos > 0) {\n            const parent = (pos - 1) >> 1;\n            const parentItem = this._priorityQueue[parent];\n            if (this._cmp(parentItem, item) <= 0)\n                break;\n            this._priorityQueue[pos] = parentItem;\n            pos = parent;\n        }\n        this._priorityQueue[pos] = item;\n    }\n    /**\n     * @internal\n     */\n    _pushDown(pos, halfLength) {\n        const item = this._priorityQueue[pos];\n        while (pos < halfLength) {\n            let left = pos << 1 | 1;\n            const right = left + 1;\n            let minItem = this._priorityQueue[left];\n            if (right < this._length &&\n                this._cmp(minItem, this._priorityQueue[right]) > 0) {\n                left = right;\n                minItem = this._priorityQueue[right];\n            }\n            if (this._cmp(minItem, item) >= 0)\n                break;\n            this._priorityQueue[pos] = minItem;\n            pos = left;\n        }\n        this._priorityQueue[pos] = item;\n    }\n    clear() {\n        this._length = 0;\n        this._priorityQueue.length = 0;\n    }\n    /**\n     * @description Push element into a container in order.\n     * @param item - The element you want to push.\n     * @returns The size of heap after pushing.\n     * @example\n     * queue.push(1);\n     */\n    push(item) {\n        this._priorityQueue.push(item);\n        this._pushUp(this._length);\n        this._length += 1;\n    }\n    /**\n     * @description Removes the top element.\n     * @returns The element you popped.\n     * @example\n     * queue.pop();\n     */\n    pop() {\n        if (this._length === 0)\n            return;\n        const value = this._priorityQueue[0];\n        const last = this._priorityQueue.pop();\n        this._length -= 1;\n        if (this._length) {\n            this._priorityQueue[0] = last;\n            this._pushDown(0, this._length >> 1);\n        }\n        return value;\n    }\n    /**\n     * @description Accesses the top element.\n     * @example\n     * const top = queue.top();\n     */\n    top() {\n        return this._priorityQueue[0];\n    }\n    /**\n     * @description Check if element is in heap.\n     * @param item - The item want to find.\n     * @returns Whether element is in heap.\n     * @example\n     * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n     * const obj = { id: 1 };\n     * que.push(obj);\n     * console.log(que.find(obj));  // true\n     */\n    find(item) {\n        return this._priorityQueue.indexOf(item) >= 0;\n    }\n    /**\n     * @description Remove specified item from heap.\n     * @param item - The item want to remove.\n     * @returns Whether remove success.\n     * @example\n     * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n     * const obj = { id: 1 };\n     * que.push(obj);\n     * que.remove(obj);\n     */\n    remove(item) {\n        const index = this._priorityQueue.indexOf(item);\n        if (index < 0)\n            return false;\n        if (index === 0) {\n            this.pop();\n        }\n        else if (index === this._length - 1) {\n            this._priorityQueue.pop();\n            this._length -= 1;\n        }\n        else {\n            this._priorityQueue.splice(index, 1, this._priorityQueue.pop());\n            this._length -= 1;\n            this._pushUp(index);\n            this._pushDown(index, this._length >> 1);\n        }\n        return true;\n    }\n    /**\n     * @description Update item and it's pos in the heap.\n     * @param item - The item want to update.\n     * @returns Whether update success.\n     * @example\n     * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n     * const obj = { id: 1 };\n     * que.push(obj);\n     * obj.id = 2;\n     * que.updateItem(obj);\n     */\n    updateItem(item) {\n        const index = this._priorityQueue.indexOf(item);\n        if (index < 0)\n            return false;\n        this._pushUp(index);\n        this._pushDown(index, this._length >> 1);\n        return true;\n    }\n    /**\n     * @returns Return a copy array of heap.\n     * @example\n     * const arr = queue.toArray();\n     */\n    toArray() {\n        return [...this._priorityQueue];\n    }\n}\nexport default PriorityQueue;\n","import { Base, initContainer } from '@/container/ContainerBase';\n\nclass PriorityQueue<T> extends Base {\n  /**\n   * @internal\n   */\n  private readonly _priorityQueue: T[];\n  /**\n   * @internal\n   */\n  private readonly _cmp: (x: T, y: T) => number;\n  /**\n   * @description PriorityQueue's constructor.\n   * @param container - Initialize container, must have a forEach function.\n   * @param cmp - Compare function.\n   * @param copy - When the container is an array, you can choose to directly operate on the original object of\n   *               the array or perform a shallow copy. The default is shallow copy.\n   * @example\n   * new PriorityQueue();\n   * new PriorityQueue([1, 2, 3]);\n   * new PriorityQueue([1, 2, 3], (x, y) => x - y);\n   * new PriorityQueue([1, 2, 3], (x, y) => x - y, false);\n   */\n  constructor(\n    container: initContainer<T> = [],\n    cmp: (x: T, y: T) => number =\n    function (x: T, y: T) {\n      if (x > y) return -1;\n      if (x < y) return 1;\n      return 0;\n    },\n    copy = true\n  ) {\n    super();\n    this._cmp = cmp;\n    if (Array.isArray(container)) {\n      this._priorityQueue = copy ? [...container] : container;\n    } else {\n      this._priorityQueue = [];\n      const self = this;\n      container.forEach(function (el) {\n        self._priorityQueue.push(el);\n      });\n    }\n    this._length = this._priorityQueue.length;\n    const halfLength = this._length >> 1;\n    for (let parent = (this._length - 1) >> 1; parent >= 0; --parent) {\n      this._pushDown(parent, halfLength);\n    }\n  }\n  /**\n   * @internal\n   */\n  private _pushUp(pos: number) {\n    const item = this._priorityQueue[pos];\n    while (pos > 0) {\n      const parent = (pos - 1) >> 1;\n      const parentItem = this._priorityQueue[parent];\n      if (this._cmp(parentItem, item) <= 0) break;\n      this._priorityQueue[pos] = parentItem;\n      pos = parent;\n    }\n    this._priorityQueue[pos] = item;\n  }\n  /**\n   * @internal\n   */\n  private _pushDown(pos: number, halfLength: number) {\n    const item = this._priorityQueue[pos];\n    while (pos < halfLength) {\n      let left = pos << 1 | 1;\n      const right = left + 1;\n      let minItem = this._priorityQueue[left];\n      if (\n        right < this._length &&\n        this._cmp(minItem, this._priorityQueue[right]) > 0\n      ) {\n        left = right;\n        minItem = this._priorityQueue[right];\n      }\n      if (this._cmp(minItem, item) >= 0) break;\n      this._priorityQueue[pos] = minItem;\n      pos = left;\n    }\n    this._priorityQueue[pos] = item;\n  }\n  clear() {\n    this._length = 0;\n    this._priorityQueue.length = 0;\n  }\n  /**\n   * @description Push element into a container in order.\n   * @param item - The element you want to push.\n   * @returns The size of heap after pushing.\n   * @example\n   * queue.push(1);\n   */\n  push(item: T) {\n    this._priorityQueue.push(item);\n    this._pushUp(this._length);\n    this._length += 1;\n  }\n  /**\n   * @description Removes the top element.\n   * @returns The element you popped.\n   * @example\n   * queue.pop();\n   */\n  pop() {\n    if (this._length === 0) return;\n    const value = this._priorityQueue[0];\n    const last = this._priorityQueue.pop()!;\n    this._length -= 1;\n    if (this._length) {\n      this._priorityQueue[0] = last;\n      this._pushDown(0, this._length >> 1);\n    }\n    return value;\n  }\n  /**\n   * @description Accesses the top element.\n   * @example\n   * const top = queue.top();\n   */\n  top(): T | undefined {\n    return this._priorityQueue[0];\n  }\n  /**\n   * @description Check if element is in heap.\n   * @param item - The item want to find.\n   * @returns Whether element is in heap.\n   * @example\n   * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n   * const obj = { id: 1 };\n   * que.push(obj);\n   * console.log(que.find(obj));  // true\n   */\n  find(item: T) {\n    return this._priorityQueue.indexOf(item) >= 0;\n  }\n  /**\n   * @description Remove specified item from heap.\n   * @param item - The item want to remove.\n   * @returns Whether remove success.\n   * @example\n   * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n   * const obj = { id: 1 };\n   * que.push(obj);\n   * que.remove(obj);\n   */\n  remove(item: T) {\n    const index = this._priorityQueue.indexOf(item);\n    if (index < 0) return false;\n    if (index === 0) {\n      this.pop();\n    } else if (index === this._length - 1) {\n      this._priorityQueue.pop();\n      this._length -= 1;\n    } else {\n      this._priorityQueue.splice(index, 1, this._priorityQueue.pop()!);\n      this._length -= 1;\n      this._pushUp(index);\n      this._pushDown(index, this._length >> 1);\n    }\n    return true;\n  }\n  /**\n   * @description Update item and it's pos in the heap.\n   * @param item - The item want to update.\n   * @returns Whether update success.\n   * @example\n   * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n   * const obj = { id: 1 };\n   * que.push(obj);\n   * obj.id = 2;\n   * que.updateItem(obj);\n   */\n  updateItem(item: T) {\n    const index = this._priorityQueue.indexOf(item);\n    if (index < 0) return false;\n    this._pushUp(index);\n    this._pushDown(index, this._length >> 1);\n    return true;\n  }\n  /**\n   * @returns Return a copy array of heap.\n   * @example\n   * const arr = queue.toArray();\n   */\n  toArray() {\n    return [...this._priorityQueue];\n  }\n}\n\nexport default PriorityQueue;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Queue.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Queue.d.ts
new file mode 100644
index 0000000..8df4e17
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Queue.d.ts
@@ -0,0 +1,22 @@
+import { Base, initContainer } from "../ContainerBase";
+declare class Queue<T> extends Base {
+    constructor(container?: initContainer<T>);
+    clear(): void;
+    /**
+     * @description Inserts element to queue's end.
+     * @param element - The element you want to push to the front.
+     * @returns The container length after pushing.
+     */
+    push(element: T): number;
+    /**
+     * @description Removes the first element.
+     * @returns The element you popped.
+     */
+    pop(): T | undefined;
+    /**
+     * @description Access the first element.
+     * @returns The first element.
+     */
+    front(): T | undefined;
+}
+export default Queue;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Queue.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Queue.js
new file mode 100644
index 0000000..cd09701
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Queue.js
@@ -0,0 +1,52 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _ContainerBase = require("../ContainerBase");
+
+class Queue extends _ContainerBase.Base {
+    constructor(t = []) {
+        super();
+        this.j = 0;
+        this.q = [];
+        const s = this;
+        t.forEach((function(t) {
+            s.push(t);
+        }));
+    }
+    clear() {
+        this.q = [];
+        this.i = this.j = 0;
+    }
+    push(t) {
+        const s = this.q.length;
+        if (this.j / s > .5 && this.j + this.i >= s && s > 4096) {
+            const s = this.i;
+            for (let t = 0; t < s; ++t) {
+                this.q[t] = this.q[this.j + t];
+            }
+            this.j = 0;
+            this.q[this.i] = t;
+        } else this.q[this.j + this.i] = t;
+        return ++this.i;
+    }
+    pop() {
+        if (this.i === 0) return;
+        const t = this.q[this.j++];
+        this.i -= 1;
+        return t;
+    }
+    front() {
+        if (this.i === 0) return;
+        return this.q[this.j];
+    }
+}
+
+var _default = Queue;
+
+exports.default = _default;
+//# sourceMappingURL=Queue.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Queue.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Queue.js.map
new file mode 100644
index 0000000..64c9626
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Queue.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/OtherContainer/Queue.js","../../src/container/OtherContainer/Queue.ts"],"names":["Object","defineProperty","exports","value","default","_ContainerBase","require","Queue","Base","constructor","container","super","this","_first","_queue","self","forEach","el","push","clear","_length","element","capacity","length","i","pop","front","_default"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,eAAe;;ACLvB,IAAAC,iBAAAC,QAAA;;AAOA,MAAMC,cAAiBC,eAAAA;IASrBC,YAAYC,IAA8B;QACxCC;QANMC,KAAAC,IAAS;QAITD,KAAAE,IAAc;QAGpB,MAAMC,IAAOH;QACbF,EAAUM,SAAQ,SAAUC;YAC1BF,EAAKG,KAAKD;ADLR;AACJ;ICOFE;QACEP,KAAKE,IAAS;QACdF,KAAKQ,IAAUR,KAAKC,IAAS;ADL7B;ICYFK,KAAKG;QACH,MAAMC,IAAWV,KAAKE,EAAOS;QAC7B,IACGX,KAAKC,IAASS,IAAS,MACvBV,KAAKC,IAASD,KAAKQ,KAAYE,KAChCA,IAAQ,MACR;YACA,MAAMC,IAASX,KAAKQ;YACpB,KAAK,IAAII,IAAI,GAAGA,IAAID,KAAUC,GAAG;gBAC/BZ,KAAKE,EAAOU,KAAKZ,KAAKE,EAAOF,KAAKC,IAASW;ADPvC;YCSNZ,KAAKC,IAAS;YACdD,KAAKE,EAAOF,KAAKQ,KAAWC;ADP1B,eCQGT,KAAKE,EAAOF,KAAKC,IAASD,KAAKQ,KAAWC;QACjD,SAAST,KAAKQ;ADLd;ICWFK;QACE,IAAIb,KAAKQ,MAAY,GAAG;QACxB,MAAMH,IAAKL,KAAKE,EAAOF,KAAKC;QAC5BD,KAAKQ,KAAW;QAChB,OAAOH;ADJP;ICUFS;QACE,IAAId,KAAKQ,MAAY,GAAG;QACxB,OAAOR,KAAKE,EAAOF,KAAKC;ADHxB;;;ACKH,IAAAc,WAEcpB;;AAAKL,QAAAE,UAAAuB","file":"Queue.js","sourcesContent":["import { Base } from \"../ContainerBase\";\nclass Queue extends Base {\n    constructor(container = []) {\n        super();\n        /**\n         * @internal\n         */\n        this._first = 0;\n        /**\n         * @internal\n         */\n        this._queue = [];\n        const self = this;\n        container.forEach(function (el) {\n            self.push(el);\n        });\n    }\n    clear() {\n        this._queue = [];\n        this._length = this._first = 0;\n    }\n    /**\n     * @description Inserts element to queue's end.\n     * @param element - The element you want to push to the front.\n     * @returns The container length after pushing.\n     */\n    push(element) {\n        const capacity = this._queue.length;\n        if ((this._first / capacity) > 0.5 /* QUEUE_CONSTANT.ALLOCATE_SIGMA */ &&\n            (this._first + this._length) >= capacity &&\n            capacity > 4096 /* QUEUE_CONSTANT.MIN_ALLOCATE_SIZE */) {\n            const length = this._length;\n            for (let i = 0; i < length; ++i) {\n                this._queue[i] = this._queue[this._first + i];\n            }\n            this._first = 0;\n            this._queue[this._length] = element;\n        }\n        else\n            this._queue[this._first + this._length] = element;\n        return ++this._length;\n    }\n    /**\n     * @description Removes the first element.\n     * @returns The element you popped.\n     */\n    pop() {\n        if (this._length === 0)\n            return;\n        const el = this._queue[this._first++];\n        this._length -= 1;\n        return el;\n    }\n    /**\n     * @description Access the first element.\n     * @returns The first element.\n     */\n    front() {\n        if (this._length === 0)\n            return;\n        return this._queue[this._first];\n    }\n}\nexport default Queue;\n","import { Base, initContainer } from '@/container/ContainerBase';\n\nconst enum QUEUE_CONSTANT {\n  ALLOCATE_SIGMA = 0.5,\n  MIN_ALLOCATE_SIZE = (1 << 12)\n}\n\nclass Queue<T> extends Base {\n  /**\n   * @internal\n   */\n  private _first = 0;\n  /**\n   * @internal\n   */\n  private _queue: T[] = [];\n  constructor(container: initContainer<T> = []) {\n    super();\n    const self = this;\n    container.forEach(function (el) {\n      self.push(el);\n    });\n  }\n  clear() {\n    this._queue = [];\n    this._length = this._first = 0;\n  }\n  /**\n   * @description Inserts element to queue's end.\n   * @param element - The element you want to push to the front.\n   * @returns The container length after pushing.\n   */\n  push(element: T) {\n    const capacity = this._queue.length;\n    if (\n      (this._first / capacity) > QUEUE_CONSTANT.ALLOCATE_SIGMA &&\n      (this._first + this._length) >= capacity &&\n      capacity > QUEUE_CONSTANT.MIN_ALLOCATE_SIZE\n    ) {\n      const length = this._length;\n      for (let i = 0; i < length; ++i) {\n        this._queue[i] = this._queue[this._first + i];\n      }\n      this._first = 0;\n      this._queue[this._length] = element;\n    } else this._queue[this._first + this._length] = element;\n    return ++this._length;\n  }\n  /**\n   * @description Removes the first element.\n   * @returns The element you popped.\n   */\n  pop() {\n    if (this._length === 0) return;\n    const el = this._queue[this._first++];\n    this._length -= 1;\n    return el;\n  }\n  /**\n   * @description Access the first element.\n   * @returns The first element.\n   */\n  front(): T | undefined {\n    if (this._length === 0) return;\n    return this._queue[this._first];\n  }\n}\n\nexport default Queue;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Stack.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Stack.d.ts
new file mode 100644
index 0000000..3b8fac1
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Stack.d.ts
@@ -0,0 +1,22 @@
+import { Base, initContainer } from "../ContainerBase";
+declare class Stack<T> extends Base {
+    constructor(container?: initContainer<T>);
+    clear(): void;
+    /**
+     * @description Insert element to stack's end.
+     * @description The element you want to push to the back.
+     * @returns The container length after erasing.
+     */
+    push(element: T): number;
+    /**
+     * @description Removes the end element.
+     * @returns The element you popped.
+     */
+    pop(): T | undefined;
+    /**
+     * @description Accesses the end element.
+     * @returns The last element.
+     */
+    top(): T | undefined;
+}
+export default Stack;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Stack.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Stack.js
new file mode 100644
index 0000000..80b8b7b
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Stack.js
@@ -0,0 +1,42 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _ContainerBase = require("../ContainerBase");
+
+class Stack extends _ContainerBase.Base {
+    constructor(t = []) {
+        super();
+        this.S = [];
+        const s = this;
+        t.forEach((function(t) {
+            s.push(t);
+        }));
+    }
+    clear() {
+        this.i = 0;
+        this.S = [];
+    }
+    push(t) {
+        this.S.push(t);
+        this.i += 1;
+        return this.i;
+    }
+    pop() {
+        if (this.i === 0) return;
+        this.i -= 1;
+        return this.S.pop();
+    }
+    top() {
+        return this.S[this.i - 1];
+    }
+}
+
+var _default = Stack;
+
+exports.default = _default;
+//# sourceMappingURL=Stack.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Stack.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Stack.js.map
new file mode 100644
index 0000000..ef54f2a
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/OtherContainer/Stack.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/OtherContainer/Stack.js","../../src/container/OtherContainer/Stack.ts"],"names":["Object","defineProperty","exports","value","default","_ContainerBase","require","Stack","Base","constructor","container","super","this","_stack","self","forEach","el","push","clear","_length","element","pop","top","_default"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,eAAe;;ACLvB,IAAAC,iBAAAC,QAAA;;AAEA,MAAMC,cAAiBC,eAAAA;IAKrBC,YAAYC,IAA8B;QACxCC;QAFMC,KAAAC,IAAc;QAGpB,MAAMC,IAAOF;QACbF,EAAUK,SAAQ,SAAUC;YAC1BF,EAAKG,KAAKD;ADAR;AACJ;ICEFE;QACEN,KAAKO,IAAU;QACfP,KAAKC,IAAS;ADAd;ICOFI,KAAKG;QACHR,KAAKC,EAAOI,KAAKG;QACjBR,KAAKO,KAAW;QAChB,OAAOP,KAAKO;ADAZ;ICMFE;QACE,IAAIT,KAAKO,MAAY,GAAG;QACxBP,KAAKO,KAAW;QAChB,OAAOP,KAAKC,EAAOQ;ADCnB;ICKFC;QACE,OAAOV,KAAKC,EAAOD,KAAKO,IAAU;ADClC;;;ACCH,IAAAI,WAEchB;;AAAKL,QAAAE,UAAAmB","file":"Stack.js","sourcesContent":["import { Base } from \"../ContainerBase\";\nclass Stack extends Base {\n    constructor(container = []) {\n        super();\n        /**\n         * @internal\n         */\n        this._stack = [];\n        const self = this;\n        container.forEach(function (el) {\n            self.push(el);\n        });\n    }\n    clear() {\n        this._length = 0;\n        this._stack = [];\n    }\n    /**\n     * @description Insert element to stack's end.\n     * @description The element you want to push to the back.\n     * @returns The container length after erasing.\n     */\n    push(element) {\n        this._stack.push(element);\n        this._length += 1;\n        return this._length;\n    }\n    /**\n     * @description Removes the end element.\n     * @returns The element you popped.\n     */\n    pop() {\n        if (this._length === 0)\n            return;\n        this._length -= 1;\n        return this._stack.pop();\n    }\n    /**\n     * @description Accesses the end element.\n     * @returns The last element.\n     */\n    top() {\n        return this._stack[this._length - 1];\n    }\n}\nexport default Stack;\n","import { Base, initContainer } from '@/container/ContainerBase';\n\nclass Stack<T> extends Base {\n  /**\n   * @internal\n   */\n  private _stack: T[] = [];\n  constructor(container: initContainer<T> = []) {\n    super();\n    const self = this;\n    container.forEach(function (el) {\n      self.push(el);\n    });\n  }\n  clear() {\n    this._length = 0;\n    this._stack = [];\n  }\n  /**\n   * @description Insert element to stack's end.\n   * @description The element you want to push to the back.\n   * @returns The container length after erasing.\n   */\n  push(element: T) {\n    this._stack.push(element);\n    this._length += 1;\n    return this._length;\n  }\n  /**\n   * @description Removes the end element.\n   * @returns The element you popped.\n   */\n  pop() {\n    if (this._length === 0) return;\n    this._length -= 1;\n    return this._stack.pop();\n  }\n  /**\n   * @description Accesses the end element.\n   * @returns The last element.\n   */\n  top(): T | undefined {\n    return this._stack[this._length - 1];\n  }\n}\n\nexport default Stack;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/RandomIterator.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/RandomIterator.d.ts
new file mode 100644
index 0000000..f9480ee
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/RandomIterator.d.ts
@@ -0,0 +1,9 @@
+import { ContainerIterator } from "../../ContainerBase";
+import SequentialContainer from "./index";
+export declare abstract class RandomIterator<T> extends ContainerIterator<T> {
+    abstract readonly container: SequentialContainer<T>;
+    get pointer(): T;
+    set pointer(newValue: T);
+    pre(): this;
+    next(): this;
+}
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/RandomIterator.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/RandomIterator.js
new file mode 100644
index 0000000..509d226
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/RandomIterator.js
@@ -0,0 +1,58 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.RandomIterator = void 0;
+
+var _ContainerBase = require("../../ContainerBase");
+
+var _throwError = require("../../../utils/throwError");
+
+class RandomIterator extends _ContainerBase.ContainerIterator {
+    constructor(t, r) {
+        super(r);
+        this.o = t;
+        if (this.iteratorType === 0) {
+            this.pre = function() {
+                if (this.o === 0) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o -= 1;
+                return this;
+            };
+            this.next = function() {
+                if (this.o === this.container.size()) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o += 1;
+                return this;
+            };
+        } else {
+            this.pre = function() {
+                if (this.o === this.container.size() - 1) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o += 1;
+                return this;
+            };
+            this.next = function() {
+                if (this.o === -1) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o -= 1;
+                return this;
+            };
+        }
+    }
+    get pointer() {
+        return this.container.getElementByPos(this.o);
+    }
+    set pointer(t) {
+        this.container.setElementByPos(this.o, t);
+    }
+}
+
+exports.RandomIterator = RandomIterator;
+//# sourceMappingURL=RandomIterator.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/RandomIterator.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/RandomIterator.js.map
new file mode 100644
index 0000000..24077f3
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/RandomIterator.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/SequentialContainer/Base/RandomIterator.js","../../src/container/SequentialContainer/Base/RandomIterator.ts"],"names":["Object","defineProperty","exports","value","RandomIterator","_ContainerBase","require","_throwError","ContainerIterator","constructor","index","iteratorType","super","this","_node","pre","throwIteratorAccessError","next","container","size","pointer","getElementByPos","newValue","setElementByPos"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,sBAAsB;;ACL9B,IAAAC,iBAAAC,QAAA;;AAEA,IAAAC,cAAAD,QAAA;;AAEM,MAAgBF,uBAA0BI,eAAAA;IAS9CC,YACEC,GACAC;QAEAC,MAAMD;QACNE,KAAKC,IAAQJ;QACb,IAAIG,KAAKF,iBAAY,GAA0B;YAC7CE,KAAKE,MAAM;gBACT,IAAIF,KAAKC,MAAU,GAAG;qBACpB,GAAAE,YAAAA;ADTM;gBCWRH,KAAKC,KAAS;gBACd,OAAOD;ADTH;YCWNA,KAAKI,OAAO;gBACV,IAAIJ,KAAKC,MAAUD,KAAKK,UAAUC,QAAQ;qBACxC,GAAAH,YAAAA;ADTM;gBCWRH,KAAKC,KAAS;gBACd,OAAOD;ADTH;AACJ,eCUG;YACLA,KAAKE,MAAM;gBACT,IAAIF,KAAKC,MAAUD,KAAKK,UAAUC,SAAS,GAAG;qBAC5C,GAAAH,YAAAA;ADRM;gBCURH,KAAKC,KAAS;gBACd,OAAOD;ADRH;YCUNA,KAAKI,OAAO;gBACV,IAAIJ,KAAKC,OAAW,GAAG;qBACrB,GAAAE,YAAAA;ADRM;gBCURH,KAAKC,KAAS;gBACd,OAAOD;ADRH;AACJ;AACJ;ICUEO;QACF,OAAOP,KAAKK,UAAUG,gBAAgBR,KAAKC;ADR3C;ICUEM,YAAQE;QACVT,KAAKK,UAAUK,gBAAgBV,KAAKC,GAAOQ;ADR3C;;;ACcHpB,QAAAE,iBAAAA","file":"RandomIterator.js","sourcesContent":["import { ContainerIterator } from \"../../ContainerBase\";\nimport { throwIteratorAccessError } from \"../../../utils/throwError\";\nexport class RandomIterator extends ContainerIterator {\n    /**\n     * @internal\n     */\n    constructor(index, iteratorType) {\n        super(iteratorType);\n        this._node = index;\n        if (this.iteratorType === 0 /* IteratorType.NORMAL */) {\n            this.pre = function () {\n                if (this._node === 0) {\n                    throwIteratorAccessError();\n                }\n                this._node -= 1;\n                return this;\n            };\n            this.next = function () {\n                if (this._node === this.container.size()) {\n                    throwIteratorAccessError();\n                }\n                this._node += 1;\n                return this;\n            };\n        }\n        else {\n            this.pre = function () {\n                if (this._node === this.container.size() - 1) {\n                    throwIteratorAccessError();\n                }\n                this._node += 1;\n                return this;\n            };\n            this.next = function () {\n                if (this._node === -1) {\n                    throwIteratorAccessError();\n                }\n                this._node -= 1;\n                return this;\n            };\n        }\n    }\n    get pointer() {\n        return this.container.getElementByPos(this._node);\n    }\n    set pointer(newValue) {\n        this.container.setElementByPos(this._node, newValue);\n    }\n}\n","import { ContainerIterator, IteratorType } from '@/container/ContainerBase';\nimport SequentialContainer from '@/container/SequentialContainer/Base/index';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nexport abstract class RandomIterator<T> extends ContainerIterator<T> {\n  abstract readonly container: SequentialContainer<T>;\n  /**\n   * @internal\n   */\n  _node: number;\n  /**\n   * @internal\n   */\n  protected constructor(\n    index: number,\n    iteratorType?: IteratorType\n  ) {\n    super(iteratorType);\n    this._node = index;\n    if (this.iteratorType === IteratorType.NORMAL) {\n      this.pre = function () {\n        if (this._node === 0) {\n          throwIteratorAccessError();\n        }\n        this._node -= 1;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === this.container.size()) {\n          throwIteratorAccessError();\n        }\n        this._node += 1;\n        return this;\n      };\n    } else {\n      this.pre = function () {\n        if (this._node === this.container.size() - 1) {\n          throwIteratorAccessError();\n        }\n        this._node += 1;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === -1) {\n          throwIteratorAccessError();\n        }\n        this._node -= 1;\n        return this;\n      };\n    }\n  }\n  get pointer() {\n    return this.container.getElementByPos(this._node);\n  }\n  set pointer(newValue: T) {\n    this.container.setElementByPos(this._node, newValue);\n  }\n  // @ts-ignore\n  pre(): this;\n  // @ts-ignore\n  next(): this;\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/index.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/index.d.ts
new file mode 100644
index 0000000..c1b4097
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/index.d.ts
@@ -0,0 +1,67 @@
+import { Container } from "../../ContainerBase";
+declare abstract class SequentialContainer<T> extends Container<T> {
+    /**
+     * @description Push the element to the back.
+     * @param element - The element you want to push.
+     * @returns The size of container after pushing.
+     */
+    abstract pushBack(element: T): number;
+    /**
+     * @description Removes the last element.
+     * @returns The element you popped.
+     */
+    abstract popBack(): T | undefined;
+    /**
+     * @description Sets element by position.
+     * @param pos - The position you want to change.
+     * @param element - The element's value you want to update.
+     * @example
+     * container.setElementByPos(-1, 1); // throw a RangeError
+     */
+    abstract setElementByPos(pos: number, element: T): void;
+    /**
+     * @description Removes the elements of the specified value.
+     * @param value - The value you want to remove.
+     * @returns The size of container after erasing.
+     * @example
+     * container.eraseElementByValue(-1);
+     */
+    abstract eraseElementByValue(value: T): number;
+    /**
+     * @description Insert several elements after the specified position.
+     * @param pos - The position you want to insert.
+     * @param element - The element you want to insert.
+     * @param num - The number of elements you want to insert (default 1).
+     * @returns The size of container after inserting.
+     * @example
+     * const container = new Vector([1, 2, 3]);
+     * container.insert(1, 4);  // [1, 4, 2, 3]
+     * container.insert(1, 5, 3); // [1, 5, 5, 5, 4, 2, 3]
+     */
+    abstract insert(pos: number, element: T, num?: number): number;
+    /**
+     * @description Reverses the container.
+     * @example
+     * const container = new Vector([1, 2, 3]);
+     * container.reverse(); // [3, 2, 1]
+     */
+    abstract reverse(): void;
+    /**
+     * @description Removes the duplication of elements in the container.
+     * @returns The size of container after inserting.
+     * @example
+     * const container = new Vector([1, 1, 3, 2, 2, 5, 5, 2]);
+     * container.unique(); // [1, 3, 2, 5, 2]
+     */
+    abstract unique(): number;
+    /**
+     * @description Sort the container.
+     * @param cmp - Comparison function to sort.
+     * @example
+     * const container = new Vector([3, 1, 10]);
+     * container.sort();  // [1, 10, 3]
+     * container.sort((x, y) => x - y); // [1, 3, 10]
+     */
+    abstract sort(cmp?: (x: T, y: T) => number): void;
+}
+export default SequentialContainer;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/index.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/index.js
new file mode 100644
index 0000000..e240081
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/index.js
@@ -0,0 +1,16 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _ContainerBase = require("../../ContainerBase");
+
+class SequentialContainer extends _ContainerBase.Container {}
+
+var _default = SequentialContainer;
+
+exports.default = _default;
+//# sourceMappingURL=index.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/index.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/index.js.map
new file mode 100644
index 0000000..730db26
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/index.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/SequentialContainer/Base/index.js","../../src/container/SequentialContainer/Base/index.ts"],"names":["Object","defineProperty","exports","value","default","_ContainerBase","require","SequentialContainer","Container","_default"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,eAAe;;ACLvB,IAAAC,iBAAAC,QAAA;;AAEA,MAAeC,4BAA+BC,eAAAA;;AAgE7C,IAAAC,WAEcF;;AAAmBL,QAAAE,UAAAK","file":"index.js","sourcesContent":[null,"import { Container } from '@/container/ContainerBase';\n\nabstract class SequentialContainer<T> extends Container<T> {\n  /**\n   * @description Push the element to the back.\n   * @param element - The element you want to push.\n   * @returns The size of container after pushing.\n   */\n  abstract pushBack(element: T): number;\n  /**\n   * @description Removes the last element.\n   * @returns The element you popped.\n   */\n  abstract popBack(): T | undefined;\n  /**\n   * @description Sets element by position.\n   * @param pos - The position you want to change.\n   * @param element - The element's value you want to update.\n   * @example\n   * container.setElementByPos(-1, 1); // throw a RangeError\n   */\n  abstract setElementByPos(pos: number, element: T): void;\n  /**\n   * @description Removes the elements of the specified value.\n   * @param value - The value you want to remove.\n   * @returns The size of container after erasing.\n   * @example\n   * container.eraseElementByValue(-1);\n   */\n  abstract eraseElementByValue(value: T): number;\n  /**\n   * @description Insert several elements after the specified position.\n   * @param pos - The position you want to insert.\n   * @param element - The element you want to insert.\n   * @param num - The number of elements you want to insert (default 1).\n   * @returns The size of container after inserting.\n   * @example\n   * const container = new Vector([1, 2, 3]);\n   * container.insert(1, 4);  // [1, 4, 2, 3]\n   * container.insert(1, 5, 3); // [1, 5, 5, 5, 4, 2, 3]\n   */\n  abstract insert(pos: number, element: T, num?: number): number;\n  /**\n   * @description Reverses the container.\n   * @example\n   * const container = new Vector([1, 2, 3]);\n   * container.reverse(); // [3, 2, 1]\n   */\n  abstract reverse(): void;\n  /**\n   * @description Removes the duplication of elements in the container.\n   * @returns The size of container after inserting.\n   * @example\n   * const container = new Vector([1, 1, 3, 2, 2, 5, 5, 2]);\n   * container.unique(); // [1, 3, 2, 5, 2]\n   */\n  abstract unique(): number;\n  /**\n   * @description Sort the container.\n   * @param cmp - Comparison function to sort.\n   * @example\n   * const container = new Vector([3, 1, 10]);\n   * container.sort();  // [1, 10, 3]\n   * container.sort((x, y) => x - y); // [1, 3, 10]\n   */\n  abstract sort(cmp?: (x: T, y: T) => number): void;\n}\n\nexport default SequentialContainer;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Deque.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Deque.d.ts
new file mode 100644
index 0000000..cf63bda
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Deque.d.ts
@@ -0,0 +1,58 @@
+import SequentialContainer from './Base';
+import { IteratorType, initContainer } from "../ContainerBase";
+import { RandomIterator } from "./Base/RandomIterator";
+declare class DequeIterator<T> extends RandomIterator<T> {
+    readonly container: Deque<T>;
+    constructor(node: number, container: Deque<T>, iteratorType?: IteratorType);
+    copy(): DequeIterator<T>;
+    equals(iter: DequeIterator<T>): boolean;
+}
+export type { DequeIterator };
+declare class Deque<T> extends SequentialContainer<T> {
+    constructor(container?: initContainer<T>, _bucketSize?: number);
+    clear(): void;
+    begin(): DequeIterator<T>;
+    end(): DequeIterator<T>;
+    rBegin(): DequeIterator<T>;
+    rEnd(): DequeIterator<T>;
+    front(): T | undefined;
+    back(): T | undefined;
+    pushBack(element: T): number;
+    popBack(): T | undefined;
+    /**
+     * @description Push the element to the front.
+     * @param element - The element you want to push.
+     * @returns The size of queue after pushing.
+     */
+    pushFront(element: T): number;
+    /**
+     * @description Remove the _first element.
+     * @returns The element you popped.
+     */
+    popFront(): T | undefined;
+    getElementByPos(pos: number): T;
+    setElementByPos(pos: number, element: T): void;
+    insert(pos: number, element: T, num?: number): number;
+    /**
+     * @description Remove all elements after the specified position (excluding the specified position).
+     * @param pos - The previous position of the first removed element.
+     * @returns The size of the container after cutting.
+     * @example
+     * deque.cut(1); // Then deque's size will be 2. deque -> [0, 1]
+     */
+    cut(pos: number): number;
+    eraseElementByPos(pos: number): number;
+    eraseElementByValue(value: T): number;
+    eraseElementByIterator(iter: DequeIterator<T>): DequeIterator<T>;
+    find(element: T): DequeIterator<T>;
+    reverse(): void;
+    unique(): number;
+    sort(cmp?: (x: T, y: T) => number): void;
+    /**
+     * @description Remove as much useless space as possible.
+     */
+    shrinkToFit(): void;
+    forEach(callback: (element: T, index: number, deque: Deque<T>) => void): void;
+    [Symbol.iterator](): Generator<T, void, unknown>;
+}
+export default Deque;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Deque.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Deque.js
new file mode 100644
index 0000000..924b1b2
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Deque.js
@@ -0,0 +1,338 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _Base = _interopRequireDefault(require("./Base"));
+
+var _RandomIterator = require("./Base/RandomIterator");
+
+function _interopRequireDefault(t) {
+    return t && t.t ? t : {
+        default: t
+    };
+}
+
+class DequeIterator extends _RandomIterator.RandomIterator {
+    constructor(t, i, s) {
+        super(t, s);
+        this.container = i;
+    }
+    copy() {
+        return new DequeIterator(this.o, this.container, this.iteratorType);
+    }
+}
+
+class Deque extends _Base.default {
+    constructor(t = [], i = 1 << 12) {
+        super();
+        this.j = 0;
+        this.D = 0;
+        this.R = 0;
+        this.N = 0;
+        this.P = 0;
+        this.A = [];
+        const s = (() => {
+            if (typeof t.length === "number") return t.length;
+            if (typeof t.size === "number") return t.size;
+            if (typeof t.size === "function") return t.size();
+            throw new TypeError("Cannot get the length or size of the container");
+        })();
+        this.F = i;
+        this.P = Math.max(Math.ceil(s / this.F), 1);
+        for (let t = 0; t < this.P; ++t) {
+            this.A.push(new Array(this.F));
+        }
+        const h = Math.ceil(s / this.F);
+        this.j = this.R = (this.P >> 1) - (h >> 1);
+        this.D = this.N = this.F - s % this.F >> 1;
+        const e = this;
+        t.forEach((function(t) {
+            e.pushBack(t);
+        }));
+    }
+    T() {
+        const t = [];
+        const i = Math.max(this.P >> 1, 1);
+        for (let s = 0; s < i; ++s) {
+            t[s] = new Array(this.F);
+        }
+        for (let i = this.j; i < this.P; ++i) {
+            t[t.length] = this.A[i];
+        }
+        for (let i = 0; i < this.R; ++i) {
+            t[t.length] = this.A[i];
+        }
+        t[t.length] = [ ...this.A[this.R] ];
+        this.j = i;
+        this.R = t.length - 1;
+        for (let s = 0; s < i; ++s) {
+            t[t.length] = new Array(this.F);
+        }
+        this.A = t;
+        this.P = t.length;
+    }
+    O(t) {
+        const i = this.D + t + 1;
+        const s = i % this.F;
+        let h = s - 1;
+        let e = this.j + (i - s) / this.F;
+        if (s === 0) e -= 1;
+        e %= this.P;
+        if (h < 0) h += this.F;
+        return {
+            curNodeBucketIndex: e,
+            curNodePointerIndex: h
+        };
+    }
+    clear() {
+        this.A = [ new Array(this.F) ];
+        this.P = 1;
+        this.j = this.R = this.i = 0;
+        this.D = this.N = this.F >> 1;
+    }
+    begin() {
+        return new DequeIterator(0, this);
+    }
+    end() {
+        return new DequeIterator(this.i, this);
+    }
+    rBegin() {
+        return new DequeIterator(this.i - 1, this, 1);
+    }
+    rEnd() {
+        return new DequeIterator(-1, this, 1);
+    }
+    front() {
+        if (this.i === 0) return;
+        return this.A[this.j][this.D];
+    }
+    back() {
+        if (this.i === 0) return;
+        return this.A[this.R][this.N];
+    }
+    pushBack(t) {
+        if (this.i) {
+            if (this.N < this.F - 1) {
+                this.N += 1;
+            } else if (this.R < this.P - 1) {
+                this.R += 1;
+                this.N = 0;
+            } else {
+                this.R = 0;
+                this.N = 0;
+            }
+            if (this.R === this.j && this.N === this.D) this.T();
+        }
+        this.i += 1;
+        this.A[this.R][this.N] = t;
+        return this.i;
+    }
+    popBack() {
+        if (this.i === 0) return;
+        const t = this.A[this.R][this.N];
+        if (this.i !== 1) {
+            if (this.N > 0) {
+                this.N -= 1;
+            } else if (this.R > 0) {
+                this.R -= 1;
+                this.N = this.F - 1;
+            } else {
+                this.R = this.P - 1;
+                this.N = this.F - 1;
+            }
+        }
+        this.i -= 1;
+        return t;
+    }
+    pushFront(t) {
+        if (this.i) {
+            if (this.D > 0) {
+                this.D -= 1;
+            } else if (this.j > 0) {
+                this.j -= 1;
+                this.D = this.F - 1;
+            } else {
+                this.j = this.P - 1;
+                this.D = this.F - 1;
+            }
+            if (this.j === this.R && this.D === this.N) this.T();
+        }
+        this.i += 1;
+        this.A[this.j][this.D] = t;
+        return this.i;
+    }
+    popFront() {
+        if (this.i === 0) return;
+        const t = this.A[this.j][this.D];
+        if (this.i !== 1) {
+            if (this.D < this.F - 1) {
+                this.D += 1;
+            } else if (this.j < this.P - 1) {
+                this.j += 1;
+                this.D = 0;
+            } else {
+                this.j = 0;
+                this.D = 0;
+            }
+        }
+        this.i -= 1;
+        return t;
+    }
+    getElementByPos(t) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        const {curNodeBucketIndex: i, curNodePointerIndex: s} = this.O(t);
+        return this.A[i][s];
+    }
+    setElementByPos(t, i) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        const {curNodeBucketIndex: s, curNodePointerIndex: h} = this.O(t);
+        this.A[s][h] = i;
+    }
+    insert(t, i, s = 1) {
+        if (t < 0 || t > this.i) {
+            throw new RangeError;
+        }
+        if (t === 0) {
+            while (s--) this.pushFront(i);
+        } else if (t === this.i) {
+            while (s--) this.pushBack(i);
+        } else {
+            const h = [];
+            for (let i = t; i < this.i; ++i) {
+                h.push(this.getElementByPos(i));
+            }
+            this.cut(t - 1);
+            for (let t = 0; t < s; ++t) this.pushBack(i);
+            for (let t = 0; t < h.length; ++t) this.pushBack(h[t]);
+        }
+        return this.i;
+    }
+    cut(t) {
+        if (t < 0) {
+            this.clear();
+            return 0;
+        }
+        const {curNodeBucketIndex: i, curNodePointerIndex: s} = this.O(t);
+        this.R = i;
+        this.N = s;
+        this.i = t + 1;
+        return this.i;
+    }
+    eraseElementByPos(t) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        if (t === 0) this.popFront(); else if (t === this.i - 1) this.popBack(); else {
+            const i = [];
+            for (let s = t + 1; s < this.i; ++s) {
+                i.push(this.getElementByPos(s));
+            }
+            this.cut(t);
+            this.popBack();
+            const s = this;
+            i.forEach((function(t) {
+                s.pushBack(t);
+            }));
+        }
+        return this.i;
+    }
+    eraseElementByValue(t) {
+        if (this.i === 0) return 0;
+        const i = [];
+        for (let s = 0; s < this.i; ++s) {
+            const h = this.getElementByPos(s);
+            if (h !== t) i.push(h);
+        }
+        const s = i.length;
+        for (let t = 0; t < s; ++t) this.setElementByPos(t, i[t]);
+        return this.cut(s - 1);
+    }
+    eraseElementByIterator(t) {
+        const i = t.o;
+        this.eraseElementByPos(i);
+        t = t.next();
+        return t;
+    }
+    find(t) {
+        for (let i = 0; i < this.i; ++i) {
+            if (this.getElementByPos(i) === t) {
+                return new DequeIterator(i, this);
+            }
+        }
+        return this.end();
+    }
+    reverse() {
+        let t = 0;
+        let i = this.i - 1;
+        while (t < i) {
+            const s = this.getElementByPos(t);
+            this.setElementByPos(t, this.getElementByPos(i));
+            this.setElementByPos(i, s);
+            t += 1;
+            i -= 1;
+        }
+    }
+    unique() {
+        if (this.i <= 1) {
+            return this.i;
+        }
+        let t = 1;
+        let i = this.getElementByPos(0);
+        for (let s = 1; s < this.i; ++s) {
+            const h = this.getElementByPos(s);
+            if (h !== i) {
+                i = h;
+                this.setElementByPos(t++, h);
+            }
+        }
+        while (this.i > t) this.popBack();
+        return this.i;
+    }
+    sort(t) {
+        const i = [];
+        for (let t = 0; t < this.i; ++t) {
+            i.push(this.getElementByPos(t));
+        }
+        i.sort(t);
+        for (let t = 0; t < this.i; ++t) this.setElementByPos(t, i[t]);
+    }
+    shrinkToFit() {
+        if (this.i === 0) return;
+        const t = [];
+        this.forEach((function(i) {
+            t.push(i);
+        }));
+        this.P = Math.max(Math.ceil(this.i / this.F), 1);
+        this.i = this.j = this.R = this.D = this.N = 0;
+        this.A = [];
+        for (let t = 0; t < this.P; ++t) {
+            this.A.push(new Array(this.F));
+        }
+        for (let i = 0; i < t.length; ++i) this.pushBack(t[i]);
+    }
+    forEach(t) {
+        for (let i = 0; i < this.i; ++i) {
+            t(this.getElementByPos(i), i, this);
+        }
+    }
+    [Symbol.iterator]() {
+        return function*() {
+            for (let t = 0; t < this.i; ++t) {
+                yield this.getElementByPos(t);
+            }
+        }.bind(this)();
+    }
+}
+
+var _default = Deque;
+
+exports.default = _default;
+//# sourceMappingURL=Deque.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Deque.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Deque.js.map
new file mode 100644
index 0000000..2b05b7d
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Deque.js.map
@@ -0,0 +1 @@
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SequentialContainer from './Base';\nimport { RandomIterator } from \"./Base/RandomIterator\";\nimport $checkWithinAccessParams from \"../../utils/checkParams.macro\";\nimport $getContainerSize from \"../../utils/getContainerSize.macro\";\nclass DequeIterator extends RandomIterator {\n    constructor(node, container, iteratorType) {\n        super(node, iteratorType);\n        this.container = container;\n    }\n    copy() {\n        return new DequeIterator(this._node, this.container, this.iteratorType);\n    }\n}\nclass Deque extends SequentialContainer {\n    constructor(container = [], _bucketSize = (1 << 12)) {\n        super();\n        /**\n         * @internal\n         */\n        this._first = 0;\n        /**\n         * @internal\n         */\n        this._curFirst = 0;\n        /**\n         * @internal\n         */\n        this._last = 0;\n        /**\n         * @internal\n         */\n        this._curLast = 0;\n        /**\n         * @internal\n         */\n        this._bucketNum = 0;\n        /**\n         * @internal\n         */\n        this._map = [];\n        const _length = (() => {\n            if (typeof container.length === \"number\")\n                return container.length;\n            if (typeof container.size === \"number\")\n                return container.size;\n            if (typeof container.size === \"function\")\n                return container.size();\n            throw new TypeError(\"Cannot get the length or size of the container\");\n        })();\n        this._bucketSize = _bucketSize;\n        this._bucketNum = Math.max(Math.ceil(_length / this._bucketSize), 1);\n        for (let i = 0; i < this._bucketNum; ++i) {\n            this._map.push(new Array(this._bucketSize));\n        }\n        const needBucketNum = Math.ceil(_length / this._bucketSize);\n        this._first = this._last = (this._bucketNum >> 1) - (needBucketNum >> 1);\n        this._curFirst = this._curLast = (this._bucketSize - _length % this._bucketSize) >> 1;\n        const self = this;\n        container.forEach(function (element) {\n            self.pushBack(element);\n        });\n    }\n    /**\n     * @description Growth the Deque.\n     * @internal\n     */\n    _reAllocate() {\n        const newMap = [];\n        const addBucketNum = Math.max(this._bucketNum >> 1, 1);\n        for (let i = 0; i < addBucketNum; ++i) {\n            newMap[i] = new Array(this._bucketSize);\n        }\n        for (let i = this._first; i < this._bucketNum; ++i) {\n            newMap[newMap.length] = this._map[i];\n        }\n        for (let i = 0; i < this._last; ++i) {\n            newMap[newMap.length] = this._map[i];\n        }\n        newMap[newMap.length] = [...this._map[this._last]];\n        this._first = addBucketNum;\n        this._last = newMap.length - 1;\n        for (let i = 0; i < addBucketNum; ++i) {\n            newMap[newMap.length] = new Array(this._bucketSize);\n        }\n        this._map = newMap;\n        this._bucketNum = newMap.length;\n    }\n    /**\n     * @description Get the bucket position of the element and the pointer position by index.\n     * @param pos - The element's index.\n     * @internal\n     */\n    _getElementIndex(pos) {\n        const offset = this._curFirst + pos + 1;\n        const offsetRemainder = offset % this._bucketSize;\n        let curNodePointerIndex = offsetRemainder - 1;\n        let curNodeBucketIndex = this._first + (offset - offsetRemainder) / this._bucketSize;\n        if (offsetRemainder === 0)\n            curNodeBucketIndex -= 1;\n        curNodeBucketIndex %= this._bucketNum;\n        if (curNodePointerIndex < 0)\n            curNodePointerIndex += this._bucketSize;\n        return { curNodeBucketIndex, curNodePointerIndex };\n    }\n    clear() {\n        this._map = [new Array(this._bucketSize)];\n        this._bucketNum = 1;\n        this._first = this._last = this._length = 0;\n        this._curFirst = this._curLast = this._bucketSize >> 1;\n    }\n    begin() {\n        return new DequeIterator(0, this);\n    }\n    end() {\n        return new DequeIterator(this._length, this);\n    }\n    rBegin() {\n        return new DequeIterator(this._length - 1, this, 1 /* IteratorType.REVERSE */);\n    }\n    rEnd() {\n        return new DequeIterator(-1, this, 1 /* IteratorType.REVERSE */);\n    }\n    front() {\n        if (this._length === 0)\n            return;\n        return this._map[this._first][this._curFirst];\n    }\n    back() {\n        if (this._length === 0)\n            return;\n        return this._map[this._last][this._curLast];\n    }\n    pushBack(element) {\n        if (this._length) {\n            if (this._curLast < this._bucketSize - 1) {\n                this._curLast += 1;\n            }\n            else if (this._last < this._bucketNum - 1) {\n                this._last += 1;\n                this._curLast = 0;\n            }\n            else {\n                this._last = 0;\n                this._curLast = 0;\n            }\n            if (this._last === this._first &&\n                this._curLast === this._curFirst)\n                this._reAllocate();\n        }\n        this._length += 1;\n        this._map[this._last][this._curLast] = element;\n        return this._length;\n    }\n    popBack() {\n        if (this._length === 0)\n            return;\n        const value = this._map[this._last][this._curLast];\n        if (this._length !== 1) {\n            if (this._curLast > 0) {\n                this._curLast -= 1;\n            }\n            else if (this._last > 0) {\n                this._last -= 1;\n                this._curLast = this._bucketSize - 1;\n            }\n            else {\n                this._last = this._bucketNum - 1;\n                this._curLast = this._bucketSize - 1;\n            }\n        }\n        this._length -= 1;\n        return value;\n    }\n    /**\n     * @description Push the element to the front.\n     * @param element - The element you want to push.\n     * @returns The size of queue after pushing.\n     */\n    pushFront(element) {\n        if (this._length) {\n            if (this._curFirst > 0) {\n                this._curFirst -= 1;\n            }\n            else if (this._first > 0) {\n                this._first -= 1;\n                this._curFirst = this._bucketSize - 1;\n            }\n            else {\n                this._first = this._bucketNum - 1;\n                this._curFirst = this._bucketSize - 1;\n            }\n            if (this._first === this._last &&\n                this._curFirst === this._curLast)\n                this._reAllocate();\n        }\n        this._length += 1;\n        this._map[this._first][this._curFirst] = element;\n        return this._length;\n    }\n    /**\n     * @description Remove the _first element.\n     * @returns The element you popped.\n     */\n    popFront() {\n        if (this._length === 0)\n            return;\n        const value = this._map[this._first][this._curFirst];\n        if (this._length !== 1) {\n            if (this._curFirst < this._bucketSize - 1) {\n                this._curFirst += 1;\n            }\n            else if (this._first < this._bucketNum - 1) {\n                this._first += 1;\n                this._curFirst = 0;\n            }\n            else {\n                this._first = 0;\n                this._curFirst = 0;\n            }\n        }\n        this._length -= 1;\n        return value;\n    }\n    getElementByPos(pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        const { curNodeBucketIndex, curNodePointerIndex } = this._getElementIndex(pos);\n        return this._map[curNodeBucketIndex][curNodePointerIndex];\n    }\n    setElementByPos(pos, element) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        const { curNodeBucketIndex, curNodePointerIndex } = this._getElementIndex(pos);\n        this._map[curNodeBucketIndex][curNodePointerIndex] = element;\n    }\n    insert(pos, element, num = 1) {\n        if (pos < 0 || pos > this._length) {\n            throw new RangeError();\n        }\n        if (pos === 0) {\n            while (num--)\n                this.pushFront(element);\n        }\n        else if (pos === this._length) {\n            while (num--)\n                this.pushBack(element);\n        }\n        else {\n            const arr = [];\n            for (let i = pos; i < this._length; ++i) {\n                arr.push(this.getElementByPos(i));\n            }\n            this.cut(pos - 1);\n            for (let i = 0; i < num; ++i)\n                this.pushBack(element);\n            for (let i = 0; i < arr.length; ++i)\n                this.pushBack(arr[i]);\n        }\n        return this._length;\n    }\n    /**\n     * @description Remove all elements after the specified position (excluding the specified position).\n     * @param pos - The previous position of the first removed element.\n     * @returns The size of the container after cutting.\n     * @example\n     * deque.cut(1); // Then deque's size will be 2. deque -> [0, 1]\n     */\n    cut(pos) {\n        if (pos < 0) {\n            this.clear();\n            return 0;\n        }\n        const { curNodeBucketIndex, curNodePointerIndex } = this._getElementIndex(pos);\n        this._last = curNodeBucketIndex;\n        this._curLast = curNodePointerIndex;\n        this._length = pos + 1;\n        return this._length;\n    }\n    eraseElementByPos(pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        if (pos === 0)\n            this.popFront();\n        else if (pos === this._length - 1)\n            this.popBack();\n        else {\n            const arr = [];\n            for (let i = pos + 1; i < this._length; ++i) {\n                arr.push(this.getElementByPos(i));\n            }\n            this.cut(pos);\n            this.popBack();\n            const self = this;\n            arr.forEach(function (el) {\n                self.pushBack(el);\n            });\n        }\n        return this._length;\n    }\n    eraseElementByValue(value) {\n        if (this._length === 0)\n            return 0;\n        const arr = [];\n        for (let i = 0; i < this._length; ++i) {\n            const element = this.getElementByPos(i);\n            if (element !== value)\n                arr.push(element);\n        }\n        const _length = arr.length;\n        for (let i = 0; i < _length; ++i)\n            this.setElementByPos(i, arr[i]);\n        return this.cut(_length - 1);\n    }\n    eraseElementByIterator(iter) {\n        const _node = iter._node;\n        this.eraseElementByPos(_node);\n        iter = iter.next();\n        return iter;\n    }\n    find(element) {\n        for (let i = 0; i < this._length; ++i) {\n            if (this.getElementByPos(i) === element) {\n                return new DequeIterator(i, this);\n            }\n        }\n        return this.end();\n    }\n    reverse() {\n        let l = 0;\n        let r = this._length - 1;\n        while (l < r) {\n            const tmp = this.getElementByPos(l);\n            this.setElementByPos(l, this.getElementByPos(r));\n            this.setElementByPos(r, tmp);\n            l += 1;\n            r -= 1;\n        }\n    }\n    unique() {\n        if (this._length <= 1) {\n            return this._length;\n        }\n        let index = 1;\n        let pre = this.getElementByPos(0);\n        for (let i = 1; i < this._length; ++i) {\n            const cur = this.getElementByPos(i);\n            if (cur !== pre) {\n                pre = cur;\n                this.setElementByPos(index++, cur);\n            }\n        }\n        while (this._length > index)\n            this.popBack();\n        return this._length;\n    }\n    sort(cmp) {\n        const arr = [];\n        for (let i = 0; i < this._length; ++i) {\n            arr.push(this.getElementByPos(i));\n        }\n        arr.sort(cmp);\n        for (let i = 0; i < this._length; ++i)\n            this.setElementByPos(i, arr[i]);\n    }\n    /**\n     * @description Remove as much useless space as possible.\n     */\n    shrinkToFit() {\n        if (this._length === 0)\n            return;\n        const arr = [];\n        this.forEach(function (el) {\n            arr.push(el);\n        });\n        this._bucketNum = Math.max(Math.ceil(this._length / this._bucketSize), 1);\n        this._length = this._first = this._last = this._curFirst = this._curLast = 0;\n        this._map = [];\n        for (let i = 0; i < this._bucketNum; ++i) {\n            this._map.push(new Array(this._bucketSize));\n        }\n        for (let i = 0; i < arr.length; ++i)\n            this.pushBack(arr[i]);\n    }\n    forEach(callback) {\n        for (let i = 0; i < this._length; ++i) {\n            callback(this.getElementByPos(i), i, this);\n        }\n    }\n    [Symbol.iterator]() {\n        return function* () {\n            for (let i = 0; i < this._length; ++i) {\n                yield this.getElementByPos(i);\n            }\n        }.bind(this)();\n    }\n}\nexport default Deque;\n","import SequentialContainer from './Base';\nimport { IteratorType, initContainer } from '@/container/ContainerBase';\nimport { RandomIterator } from '@/container/SequentialContainer/Base/RandomIterator';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport $getContainerSize from '@/utils/getContainerSize.macro';\n\nclass DequeIterator<T> extends RandomIterator<T> {\n  readonly container: Deque<T>;\n  constructor(node: number, container: Deque<T>, iteratorType?: IteratorType) {\n    super(node, iteratorType);\n    this.container = container;\n  }\n  copy() {\n    return new DequeIterator<T>(this._node, this.container, this.iteratorType);\n  }\n  // @ts-ignore\n  equals(iter: DequeIterator<T>): boolean;\n}\n\nexport type { DequeIterator };\n\nclass Deque<T> extends SequentialContainer<T> {\n  /**\n   * @internal\n   */\n  private _first = 0;\n  /**\n   * @internal\n   */\n  private _curFirst = 0;\n  /**\n   * @internal\n   */\n  private _last = 0;\n  /**\n   * @internal\n   */\n  private _curLast = 0;\n  /**\n   * @internal\n   */\n  private _bucketNum = 0;\n  /**\n   * @internal\n   */\n  private readonly _bucketSize: number;\n  /**\n   * @internal\n   */\n  private _map: T[][] = [];\n  constructor(container: initContainer<T> = [], _bucketSize = (1 << 12)) {\n    super();\n    const _length = $getContainerSize!(container);\n    this._bucketSize = _bucketSize;\n    this._bucketNum = Math.max(Math.ceil(_length / this._bucketSize), 1);\n    for (let i = 0; i < this._bucketNum; ++i) {\n      this._map.push(new Array(this._bucketSize));\n    }\n    const needBucketNum = Math.ceil(_length / this._bucketSize);\n    this._first = this._last = (this._bucketNum >> 1) - (needBucketNum >> 1);\n    this._curFirst = this._curLast = (this._bucketSize - _length % this._bucketSize) >> 1;\n    const self = this;\n    container.forEach(function (element) {\n      self.pushBack(element);\n    });\n  }\n  /**\n   * @description Growth the Deque.\n   * @internal\n   */\n  private _reAllocate() {\n    const newMap = [];\n    const addBucketNum = Math.max(this._bucketNum >> 1, 1);\n    for (let i = 0; i < addBucketNum; ++i) {\n      newMap[i] = new Array(this._bucketSize);\n    }\n    for (let i = this._first; i < this._bucketNum; ++i) {\n      newMap[newMap.length] = this._map[i];\n    }\n    for (let i = 0; i < this._last; ++i) {\n      newMap[newMap.length] = this._map[i];\n    }\n    newMap[newMap.length] = [...this._map[this._last]];\n    this._first = addBucketNum;\n    this._last = newMap.length - 1;\n    for (let i = 0; i < addBucketNum; ++i) {\n      newMap[newMap.length] = new Array(this._bucketSize);\n    }\n    this._map = newMap;\n    this._bucketNum = newMap.length;\n  }\n  /**\n   * @description Get the bucket position of the element and the pointer position by index.\n   * @param pos - The element's index.\n   * @internal\n   */\n  private _getElementIndex(pos: number) {\n    const offset = this._curFirst + pos + 1;\n    const offsetRemainder = offset % this._bucketSize;\n    let curNodePointerIndex = offsetRemainder - 1;\n    let curNodeBucketIndex = this._first + (offset - offsetRemainder) / this._bucketSize;\n    if (offsetRemainder === 0) curNodeBucketIndex -= 1;\n    curNodeBucketIndex %= this._bucketNum;\n    if (curNodePointerIndex < 0) curNodePointerIndex += this._bucketSize;\n    return { curNodeBucketIndex, curNodePointerIndex };\n  }\n  clear() {\n    this._map = [new Array(this._bucketSize)];\n    this._bucketNum = 1;\n    this._first = this._last = this._length = 0;\n    this._curFirst = this._curLast = this._bucketSize >> 1;\n  }\n  begin() {\n    return new DequeIterator<T>(0, this);\n  }\n  end() {\n    return new DequeIterator<T>(this._length, this);\n  }\n  rBegin() {\n    return new DequeIterator<T>(this._length - 1, this, IteratorType.REVERSE);\n  }\n  rEnd() {\n    return new DequeIterator<T>(-1, this, IteratorType.REVERSE);\n  }\n  front(): T | undefined {\n    if (this._length === 0) return;\n    return this._map[this._first][this._curFirst];\n  }\n  back(): T | undefined {\n    if (this._length === 0) return;\n    return this._map[this._last][this._curLast];\n  }\n  pushBack(element: T) {\n    if (this._length) {\n      if (this._curLast < this._bucketSize - 1) {\n        this._curLast += 1;\n      } else if (this._last < this._bucketNum - 1) {\n        this._last += 1;\n        this._curLast = 0;\n      } else {\n        this._last = 0;\n        this._curLast = 0;\n      }\n      if (\n        this._last === this._first &&\n        this._curLast === this._curFirst\n      ) this._reAllocate();\n    }\n    this._length += 1;\n    this._map[this._last][this._curLast] = element;\n    return this._length;\n  }\n  popBack() {\n    if (this._length === 0) return;\n    const value = this._map[this._last][this._curLast];\n    if (this._length !== 1) {\n      if (this._curLast > 0) {\n        this._curLast -= 1;\n      } else if (this._last > 0) {\n        this._last -= 1;\n        this._curLast = this._bucketSize - 1;\n      } else {\n        this._last = this._bucketNum - 1;\n        this._curLast = this._bucketSize - 1;\n      }\n    }\n    this._length -= 1;\n    return value;\n  }\n  /**\n   * @description Push the element to the front.\n   * @param element - The element you want to push.\n   * @returns The size of queue after pushing.\n   */\n  pushFront(element: T) {\n    if (this._length) {\n      if (this._curFirst > 0) {\n        this._curFirst -= 1;\n      } else if (this._first > 0) {\n        this._first -= 1;\n        this._curFirst = this._bucketSize - 1;\n      } else {\n        this._first = this._bucketNum - 1;\n        this._curFirst = this._bucketSize - 1;\n      }\n      if (\n        this._first === this._last &&\n        this._curFirst === this._curLast\n      ) this._reAllocate();\n    }\n    this._length += 1;\n    this._map[this._first][this._curFirst] = element;\n    return this._length;\n  }\n  /**\n   * @description Remove the _first element.\n   * @returns The element you popped.\n   */\n  popFront() {\n    if (this._length === 0) return;\n    const value = this._map[this._first][this._curFirst];\n    if (this._length !== 1) {\n      if (this._curFirst < this._bucketSize - 1) {\n        this._curFirst += 1;\n      } else if (this._first < this._bucketNum - 1) {\n        this._first += 1;\n        this._curFirst = 0;\n      } else {\n        this._first = 0;\n        this._curFirst = 0;\n      }\n    }\n    this._length -= 1;\n    return value;\n  }\n  getElementByPos(pos: number): T {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    const {\n      curNodeBucketIndex,\n      curNodePointerIndex\n    } = this._getElementIndex(pos);\n    return this._map[curNodeBucketIndex][curNodePointerIndex]!;\n  }\n  setElementByPos(pos: number, element: T) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    const {\n      curNodeBucketIndex,\n      curNodePointerIndex\n    } = this._getElementIndex(pos);\n    this._map[curNodeBucketIndex][curNodePointerIndex] = element;\n  }\n  insert(pos: number, element: T, num = 1) {\n    $checkWithinAccessParams!(pos, 0, this._length);\n    if (pos === 0) {\n      while (num--) this.pushFront(element);\n    } else if (pos === this._length) {\n      while (num--) this.pushBack(element);\n    } else {\n      const arr: T[] = [];\n      for (let i = pos; i < this._length; ++i) {\n        arr.push(this.getElementByPos(i));\n      }\n      this.cut(pos - 1);\n      for (let i = 0; i < num; ++i) this.pushBack(element);\n      for (let i = 0; i < arr.length; ++i) this.pushBack(arr[i]);\n    }\n    return this._length;\n  }\n  /**\n   * @description Remove all elements after the specified position (excluding the specified position).\n   * @param pos - The previous position of the first removed element.\n   * @returns The size of the container after cutting.\n   * @example\n   * deque.cut(1); // Then deque's size will be 2. deque -> [0, 1]\n   */\n  cut(pos: number) {\n    if (pos < 0) {\n      this.clear();\n      return 0;\n    }\n    const {\n      curNodeBucketIndex,\n      curNodePointerIndex\n    } = this._getElementIndex(pos);\n    this._last = curNodeBucketIndex;\n    this._curLast = curNodePointerIndex;\n    this._length = pos + 1;\n    return this._length;\n  }\n  eraseElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    if (pos === 0) this.popFront();\n    else if (pos === this._length - 1) this.popBack();\n    else {\n      const arr = [];\n      for (let i = pos + 1; i < this._length; ++i) {\n        arr.push(this.getElementByPos(i));\n      }\n      this.cut(pos);\n      this.popBack();\n      const self = this;\n      arr.forEach(function (el) {\n        self.pushBack(el);\n      });\n    }\n    return this._length;\n  }\n  eraseElementByValue(value: T) {\n    if (this._length === 0) return 0;\n    const arr: T[] = [];\n    for (let i = 0; i < this._length; ++i) {\n      const element = this.getElementByPos(i);\n      if (element !== value) arr.push(element);\n    }\n    const _length = arr.length;\n    for (let i = 0; i < _length; ++i) this.setElementByPos(i, arr[i]);\n    return this.cut(_length - 1);\n  }\n  eraseElementByIterator(iter: DequeIterator<T>) {\n    const _node = iter._node;\n    this.eraseElementByPos(_node);\n    iter = iter.next();\n    return iter;\n  }\n  find(element: T) {\n    for (let i = 0; i < this._length; ++i) {\n      if (this.getElementByPos(i) === element) {\n        return new DequeIterator<T>(i, this);\n      }\n    }\n    return this.end();\n  }\n  reverse() {\n    let l = 0; let r = this._length - 1;\n    while (l < r) {\n      const tmp = this.getElementByPos(l);\n      this.setElementByPos(l, this.getElementByPos(r));\n      this.setElementByPos(r, tmp);\n      l += 1;\n      r -= 1;\n    }\n  }\n  unique() {\n    if (this._length <= 1) {\n      return this._length;\n    }\n    let index = 1;\n    let pre = this.getElementByPos(0);\n    for (let i = 1; i < this._length; ++i) {\n      const cur = this.getElementByPos(i);\n      if (cur !== pre) {\n        pre = cur;\n        this.setElementByPos(index++, cur);\n      }\n    }\n    while (this._length > index) this.popBack();\n    return this._length;\n  }\n  sort(cmp?: (x: T, y: T) => number) {\n    const arr: T[] = [];\n    for (let i = 0; i < this._length; ++i) {\n      arr.push(this.getElementByPos(i));\n    }\n    arr.sort(cmp);\n    for (let i = 0; i < this._length; ++i) this.setElementByPos(i, arr[i]);\n  }\n  /**\n   * @description Remove as much useless space as possible.\n   */\n  shrinkToFit() {\n    if (this._length === 0) return;\n    const arr: T[] = [];\n    this.forEach(function (el) {\n      arr.push(el);\n    });\n    this._bucketNum = Math.max(Math.ceil(this._length / this._bucketSize), 1);\n    this._length = this._first = this._last = this._curFirst = this._curLast = 0;\n    this._map = [];\n    for (let i = 0; i < this._bucketNum; ++i) {\n      this._map.push(new Array(this._bucketSize));\n    }\n    for (let i = 0; i < arr.length; ++i) this.pushBack(arr[i]);\n  }\n  forEach(callback: (element: T, index: number, deque: Deque<T>) => void) {\n    for (let i = 0; i < this._length; ++i) {\n      callback(this.getElementByPos(i), i, this);\n    }\n  }\n  [Symbol.iterator]() {\n    return function * (this: Deque<T>) {\n      for (let i = 0; i < this._length; ++i) {\n        yield this.getElementByPos(i);\n      }\n    }.bind(this)();\n  }\n}\n\nexport default Deque;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/LinkList.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/LinkList.d.ts
new file mode 100644
index 0000000..1aca864
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/LinkList.d.ts
@@ -0,0 +1,58 @@
+import SequentialContainer from './Base';
+import { ContainerIterator, initContainer } from "../ContainerBase";
+declare class LinkListIterator<T> extends ContainerIterator<T> {
+    readonly container: LinkList<T>;
+    get pointer(): T;
+    set pointer(newValue: T);
+    copy(): LinkListIterator<T>;
+    equals(iter: LinkListIterator<T>): boolean;
+    pre(): this;
+    next(): this;
+}
+export type { LinkListIterator };
+declare class LinkList<T> extends SequentialContainer<T> {
+    constructor(container?: initContainer<T>);
+    clear(): void;
+    begin(): LinkListIterator<T>;
+    end(): LinkListIterator<T>;
+    rBegin(): LinkListIterator<T>;
+    rEnd(): LinkListIterator<T>;
+    front(): T | undefined;
+    back(): T | undefined;
+    getElementByPos(pos: number): T;
+    eraseElementByPos(pos: number): number;
+    eraseElementByValue(_value: T): number;
+    eraseElementByIterator(iter: LinkListIterator<T>): LinkListIterator<T>;
+    pushBack(element: T): number;
+    popBack(): T | undefined;
+    /**
+     * @description Push an element to the front.
+     * @param element - The element you want to push.
+     * @returns The size of queue after pushing.
+     */
+    pushFront(element: T): number;
+    /**
+     * @description Removes the first element.
+     * @returns The element you popped.
+     */
+    popFront(): T | undefined;
+    setElementByPos(pos: number, element: T): void;
+    insert(pos: number, element: T, num?: number): number;
+    find(element: T): LinkListIterator<T>;
+    reverse(): void;
+    unique(): number;
+    sort(cmp?: (x: T, y: T) => number): void;
+    /**
+     * @description Merges two sorted lists.
+     * @param list - The other list you want to merge (must be sorted).
+     * @returns The size of list after merging.
+     * @example
+     * const linkA = new LinkList([1, 3, 5]);
+     * const linkB = new LinkList([2, 4, 6]);
+     * linkA.merge(linkB);  // [1, 2, 3, 4, 5];
+     */
+    merge(list: LinkList<T>): number;
+    forEach(callback: (element: T, index: number, list: LinkList<T>) => void): void;
+    [Symbol.iterator](): Generator<T, void, unknown>;
+}
+export default LinkList;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/LinkList.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/LinkList.js
new file mode 100644
index 0000000..068a857
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/LinkList.js
@@ -0,0 +1,330 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _Base = _interopRequireDefault(require("./Base"));
+
+var _ContainerBase = require("../ContainerBase");
+
+var _throwError = require("../../utils/throwError");
+
+function _interopRequireDefault(t) {
+    return t && t.t ? t : {
+        default: t
+    };
+}
+
+class LinkListIterator extends _ContainerBase.ContainerIterator {
+    constructor(t, i, s, r) {
+        super(r);
+        this.o = t;
+        this.h = i;
+        this.container = s;
+        if (this.iteratorType === 0) {
+            this.pre = function() {
+                if (this.o.L === this.h) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.L;
+                return this;
+            };
+            this.next = function() {
+                if (this.o === this.h) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.B;
+                return this;
+            };
+        } else {
+            this.pre = function() {
+                if (this.o.B === this.h) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.B;
+                return this;
+            };
+            this.next = function() {
+                if (this.o === this.h) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.L;
+                return this;
+            };
+        }
+    }
+    get pointer() {
+        if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+        }
+        return this.o.l;
+    }
+    set pointer(t) {
+        if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+        }
+        this.o.l = t;
+    }
+    copy() {
+        return new LinkListIterator(this.o, this.h, this.container, this.iteratorType);
+    }
+}
+
+class LinkList extends _Base.default {
+    constructor(t = []) {
+        super();
+        this.h = {};
+        this.p = this._ = this.h.L = this.h.B = this.h;
+        const i = this;
+        t.forEach((function(t) {
+            i.pushBack(t);
+        }));
+    }
+    V(t) {
+        const {L: i, B: s} = t;
+        i.B = s;
+        s.L = i;
+        if (t === this.p) {
+            this.p = s;
+        }
+        if (t === this._) {
+            this._ = i;
+        }
+        this.i -= 1;
+    }
+    G(t, i) {
+        const s = i.B;
+        const r = {
+            l: t,
+            L: i,
+            B: s
+        };
+        i.B = r;
+        s.L = r;
+        if (i === this.h) {
+            this.p = r;
+        }
+        if (s === this.h) {
+            this._ = r;
+        }
+        this.i += 1;
+    }
+    clear() {
+        this.i = 0;
+        this.p = this._ = this.h.L = this.h.B = this.h;
+    }
+    begin() {
+        return new LinkListIterator(this.p, this.h, this);
+    }
+    end() {
+        return new LinkListIterator(this.h, this.h, this);
+    }
+    rBegin() {
+        return new LinkListIterator(this._, this.h, this, 1);
+    }
+    rEnd() {
+        return new LinkListIterator(this.h, this.h, this, 1);
+    }
+    front() {
+        return this.p.l;
+    }
+    back() {
+        return this._.l;
+    }
+    getElementByPos(t) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        let i = this.p;
+        while (t--) {
+            i = i.B;
+        }
+        return i.l;
+    }
+    eraseElementByPos(t) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        let i = this.p;
+        while (t--) {
+            i = i.B;
+        }
+        this.V(i);
+        return this.i;
+    }
+    eraseElementByValue(t) {
+        let i = this.p;
+        while (i !== this.h) {
+            if (i.l === t) {
+                this.V(i);
+            }
+            i = i.B;
+        }
+        return this.i;
+    }
+    eraseElementByIterator(t) {
+        const i = t.o;
+        if (i === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+        }
+        t = t.next();
+        this.V(i);
+        return t;
+    }
+    pushBack(t) {
+        this.G(t, this._);
+        return this.i;
+    }
+    popBack() {
+        if (this.i === 0) return;
+        const t = this._.l;
+        this.V(this._);
+        return t;
+    }
+    pushFront(t) {
+        this.G(t, this.h);
+        return this.i;
+    }
+    popFront() {
+        if (this.i === 0) return;
+        const t = this.p.l;
+        this.V(this.p);
+        return t;
+    }
+    setElementByPos(t, i) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        let s = this.p;
+        while (t--) {
+            s = s.B;
+        }
+        s.l = i;
+    }
+    insert(t, i, s = 1) {
+        if (t < 0 || t > this.i) {
+            throw new RangeError;
+        }
+        if (s <= 0) return this.i;
+        if (t === 0) {
+            while (s--) this.pushFront(i);
+        } else if (t === this.i) {
+            while (s--) this.pushBack(i);
+        } else {
+            let r = this.p;
+            for (let i = 1; i < t; ++i) {
+                r = r.B;
+            }
+            const e = r.B;
+            this.i += s;
+            while (s--) {
+                r.B = {
+                    l: i,
+                    L: r
+                };
+                r.B.L = r;
+                r = r.B;
+            }
+            r.B = e;
+            e.L = r;
+        }
+        return this.i;
+    }
+    find(t) {
+        let i = this.p;
+        while (i !== this.h) {
+            if (i.l === t) {
+                return new LinkListIterator(i, this.h, this);
+            }
+            i = i.B;
+        }
+        return this.end();
+    }
+    reverse() {
+        if (this.i <= 1) return;
+        let t = this.p;
+        let i = this._;
+        let s = 0;
+        while (s << 1 < this.i) {
+            const r = t.l;
+            t.l = i.l;
+            i.l = r;
+            t = t.B;
+            i = i.L;
+            s += 1;
+        }
+    }
+    unique() {
+        if (this.i <= 1) {
+            return this.i;
+        }
+        let t = this.p;
+        while (t !== this.h) {
+            let i = t;
+            while (i.B !== this.h && i.l === i.B.l) {
+                i = i.B;
+                this.i -= 1;
+            }
+            t.B = i.B;
+            t.B.L = t;
+            t = t.B;
+        }
+        return this.i;
+    }
+    sort(t) {
+        if (this.i <= 1) return;
+        const i = [];
+        this.forEach((function(t) {
+            i.push(t);
+        }));
+        i.sort(t);
+        let s = this.p;
+        i.forEach((function(t) {
+            s.l = t;
+            s = s.B;
+        }));
+    }
+    merge(t) {
+        const i = this;
+        if (this.i === 0) {
+            t.forEach((function(t) {
+                i.pushBack(t);
+            }));
+        } else {
+            let s = this.p;
+            t.forEach((function(t) {
+                while (s !== i.h && s.l <= t) {
+                    s = s.B;
+                }
+                i.G(t, s.L);
+            }));
+        }
+        return this.i;
+    }
+    forEach(t) {
+        let i = this.p;
+        let s = 0;
+        while (i !== this.h) {
+            t(i.l, s++, this);
+            i = i.B;
+        }
+    }
+    [Symbol.iterator]() {
+        return function*() {
+            if (this.i === 0) return;
+            let t = this.p;
+            while (t !== this.h) {
+                yield t.l;
+                t = t.B;
+            }
+        }.bind(this)();
+    }
+}
+
+var _default = LinkList;
+
+exports.default = _default;
+//# sourceMappingURL=LinkList.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/LinkList.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/LinkList.js.map
new file mode 100644
index 0000000..203dd3f
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/LinkList.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/SequentialContainer/LinkList.js","../../src/container/SequentialContainer/LinkList.ts"],"names":["Object","defineProperty","exports","value","default","_Base","_interopRequireDefault","require","_ContainerBase","_throwError","obj","__esModule","LinkListIterator","ContainerIterator","constructor","_node","_header","container","iteratorType","super","this","pre","_pre","throwIteratorAccessError","next","_next","pointer","_value","newValue","copy","LinkList","SequentialContainer","_head","_tail","self","forEach","el","pushBack","_eraseNode","node","L","B","_length","_insertNode","clear","begin","end","rBegin","rEnd","front","back","getElementByPos","pos","RangeError","curNode","eraseElementByPos","eraseElementByValue","eraseElementByIterator","iter","element","popBack","pushFront","popFront","setElementByPos","insert","num","i","find","reverse","pHead","pTail","cnt","tmp","unique","tmpNode","sort","cmp","arr","push","merge","list","callback","index","Symbol","iterator","bind","_default"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,eAAe;;ACLvB,IAAAC,QAAAC,uBAAAC,QAAA;;AACA,IAAAC,iBAAAD,QAAA;;AAEA,IAAAE,cAAAF,QAAA;;AAA8D,SAAAD,uBAAAI;IAAA,OAAAA,KAAAA,EAAAC,IAAAD,IAAA;QAAAN,SAAAM;;AAAA;;AAQ9D,MAAME,yBAA4BC,eAAAA;IAahCC,YACEC,GACAC,GACAC,GACAC;QAEAC,MAAMD;QACNE,KAAKL,IAAQA;QACbK,KAAKJ,IAAUA;QACfI,KAAKH,YAAYA;QACjB,IAAIG,KAAKF,iBAAY,GAA0B;YAC7CE,KAAKC,MAAM;gBACT,IAAID,KAAKL,EAAMO,MAASF,KAAKJ,GAAS;qBACpC,GAAAO,YAAAA;ADpBM;gBCsBRH,KAAKL,IAAQK,KAAKL,EAAMO;gBACxB,OAAOF;ADpBH;YCsBNA,KAAKI,OAAO;gBACV,IAAIJ,KAAKL,MAAUK,KAAKJ,GAAS;qBAC/B,GAAAO,YAAAA;ADpBM;gBCsBRH,KAAKL,IAAQK,KAAKL,EAAMU;gBACxB,OAAOL;ADpBH;AACJ,eCqBG;YACLA,KAAKC,MAAM;gBACT,IAAID,KAAKL,EAAMU,MAAUL,KAAKJ,GAAS;qBACrC,GAAAO,YAAAA;ADnBM;gBCqBRH,KAAKL,IAAQK,KAAKL,EAAMU;gBACxB,OAAOL;ADnBH;YCqBNA,KAAKI,OAAO;gBACV,IAAIJ,KAAKL,MAAUK,KAAKJ,GAAS;qBAC/B,GAAAO,YAAAA;ADnBM;gBCqBRH,KAAKL,IAAQK,KAAKL,EAAMO;gBACxB,OAAOF;ADnBH;AACJ;AACJ;ICqBEM;QACF,IAAIN,KAAKL,MAAUK,KAAKJ,GAAS;aAC/B,GAAAO,YAAAA;ADnBE;QCqBJ,OAAOH,KAAKL,EAAMY;ADnBlB;ICqBED,YAAQE;QACV,IAAIR,KAAKL,MAAUK,KAAKJ,GAAS;aAC/B,GAAAO,YAAAA;ADnBE;QCqBJH,KAAKL,EAAMY,IAASC;ADnBpB;ICqBFC;QACE,OAAO,IAAIjB,iBAAoBQ,KAAKL,GAAOK,KAAKJ,GAASI,KAAKH,WAAWG,KAAKF;ADnB9E;;;AC+BJ,MAAMY,iBAAoBC,MAAAA;IAaxBjB,YAAYG,IAA8B;QACxCE;QACAC,KAAKJ,IAAuB,CAAA;QAC5BI,KAAKY,IAAQZ,KAAKa,IAAQb,KAAKJ,EAAQM,IAAOF,KAAKJ,EAAQS,IAAQL,KAAKJ;QACxE,MAAMkB,IAAOd;QACbH,EAAUkB,SAAQ,SAAUC;YAC1BF,EAAKG,SAASD;ADxCZ;AACJ;IC6CME,EAAWC;QACjB,OAAMC,GAAElB,GAAImB,GAAEhB,KAAUc;QACxBjB,EAAKG,IAAQA;QACbA,EAAMH,IAAOA;QACb,IAAIiB,MAASnB,KAAKY,GAAO;YACvBZ,KAAKY,IAAQP;ADxCX;QC0CJ,IAAIc,MAASnB,KAAKa,GAAO;YACvBb,KAAKa,IAAQX;ADxCX;QC0CJF,KAAKsB,KAAW;ADxChB;IC6CMC,EAAYxC,GAAUkB;QAC5B,MAAMG,IAAOH,EAAII;QACjB,MAAMc,IAAO;YACXZ,GAAQxB;YACRmB,GAAMD;YACNI,GAAOD;;QAETH,EAAII,IAAQc;QACZf,EAAKF,IAAOiB;QACZ,IAAIlB,MAAQD,KAAKJ,GAAS;YACxBI,KAAKY,IAAQO;ADxCX;QC0CJ,IAAIf,MAASJ,KAAKJ,GAAS;YACzBI,KAAKa,IAAQM;ADxCX;QC0CJnB,KAAKsB,KAAW;ADxChB;IC0CFE;QACExB,KAAKsB,IAAU;QACftB,KAAKY,IAAQZ,KAAKa,IAAQb,KAAKJ,EAAQM,IAAOF,KAAKJ,EAAQS,IAAQL,KAAKJ;ADxCxE;IC0CF6B;QACE,OAAO,IAAIjC,iBAAoBQ,KAAKY,GAAOZ,KAAKJ,GAASI;ADxCzD;IC0CF0B;QACE,OAAO,IAAIlC,iBAAoBQ,KAAKJ,GAASI,KAAKJ,GAASI;ADxC3D;IC0CF2B;QACE,OAAO,IAAInC,iBAAoBQ,KAAKa,GAAOb,KAAKJ,GAASI,MAAI;ADxC7D;IC0CF4B;QACE,OAAO,IAAIpC,iBAAoBQ,KAAKJ,GAASI,KAAKJ,GAASI,MAAI;ADxC/D;IC0CF6B;QACE,OAAO7B,KAAKY,EAAML;ADxClB;IC0CFuB;QACE,OAAO9B,KAAKa,EAAMN;ADxClB;IC0CFwB,gBAAgBC;QDxCV,ICyCsBA,IAAG,KAAHA,IAAQhC,KAAKsB,IAAO,GAhKpC;YAAE,MAAU,IAAIW;ADyHtB;QCwCJ,IAAIC,IAAUlC,KAAKY;QACnB,OAAOoB,KAAO;YACZE,IAAUA,EAAQ7B;ADtChB;QCwCJ,OAAO6B,EAAQ3B;ADtCf;ICwCF4B,kBAAkBH;QDtCZ,ICuCsBA,IAAG,KAAHA,IAAQhC,KAAKsB,IAAO,GAxKpC;YAAE,MAAU,IAAIW;ADmItB;QCsCJ,IAAIC,IAAUlC,KAAKY;QACnB,OAAOoB,KAAO;YACZE,IAAUA,EAAQ7B;ADpChB;QCsCJL,KAAKkB,EAAWgB;QAChB,OAAOlC,KAAKsB;ADpCZ;ICsCFc,oBAAoB7B;QAClB,IAAI2B,IAAUlC,KAAKY;QACnB,OAAOsB,MAAYlC,KAAKJ,GAAS;YAC/B,IAAIsC,EAAQ3B,MAAWA,GAAQ;gBAC7BP,KAAKkB,EAAWgB;ADpCZ;YCsCNA,IAAUA,EAAQ7B;ADpChB;QCsCJ,OAAOL,KAAKsB;ADpCZ;ICsCFe,uBAAuBC;QACrB,MAAMnB,IAAOmB,EAAK3C;QAClB,IAAIwB,MAASnB,KAAKJ,GAAS;aACzB,GAAAO,YAAAA;ADpCE;QCsCJmC,IAAOA,EAAKlC;QACZJ,KAAKkB,EAAWC;QAChB,OAAOmB;ADpCP;ICsCFrB,SAASsB;QACPvC,KAAKuB,EAAYgB,GAASvC,KAAKa;QAC/B,OAAOb,KAAKsB;ADpCZ;ICsCFkB;QACE,IAAIxC,KAAKsB,MAAY,GAAG;QACxB,MAAMvC,IAAQiB,KAAKa,EAAMN;QACzBP,KAAKkB,EAAWlB,KAAKa;QACrB,OAAO9B;ADnCP;IC0CF0D,UAAUF;QACRvC,KAAKuB,EAAYgB,GAASvC,KAAKJ;QAC/B,OAAOI,KAAKsB;ADnCZ;ICyCFoB;QACE,IAAI1C,KAAKsB,MAAY,GAAG;QACxB,MAAMvC,IAAQiB,KAAKY,EAAML;QACzBP,KAAKkB,EAAWlB,KAAKY;QACrB,OAAO7B;ADlCP;ICoCF4D,gBAAgBX,GAAaO;QDlCvB,ICmCsBP,IAAG,KAAHA,IAAQhC,KAAKsB,IAAO,GAjOpC;YAAE,MAAU,IAAIW;ADgMtB;QCkCJ,IAAIC,IAAUlC,KAAKY;QACnB,OAAOoB,KAAO;YACZE,IAAUA,EAAQ7B;ADhChB;QCkCJ6B,EAAQ3B,IAASgC;ADhCjB;ICkCFK,OAAOZ,GAAaO,GAAYM,IAAM;QDhChC,ICiCsBb,IAAG,KAAHA,IAAQhC,KAAKsB,GAzO7B;YAAE,MAAU,IAAIW;AD0MtB;QCgCJ,IAAIY,KAAO,GAAG,OAAO7C,KAAKsB;QAC1B,IAAIU,MAAQ,GAAG;YACb,OAAOa,KAAO7C,KAAKyC,UAAUF;AD5B3B,eC6BG,IAAIP,MAAQhC,KAAKsB,GAAS;YAC/B,OAAOuB,KAAO7C,KAAKiB,SAASsB;AD1B1B,eC2BG;YACL,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SequentialContainer from './Base';\nimport { ContainerIterator } from \"../ContainerBase\";\nimport $checkWithinAccessParams from \"../../utils/checkParams.macro\";\nimport { throwIteratorAccessError } from \"../../utils/throwError\";\nclass LinkListIterator extends ContainerIterator {\n    /**\n     * @internal\n     */\n    constructor(_node, _header, container, iteratorType) {\n        super(iteratorType);\n        this._node = _node;\n        this._header = _header;\n        this.container = container;\n        if (this.iteratorType === 0 /* IteratorType.NORMAL */) {\n            this.pre = function () {\n                if (this._node._pre === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre;\n                return this;\n            };\n            this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next;\n                return this;\n            };\n        }\n        else {\n            this.pre = function () {\n                if (this._node._next === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next;\n                return this;\n            };\n            this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre;\n                return this;\n            };\n        }\n    }\n    get pointer() {\n        if (this._node === this._header) {\n            throwIteratorAccessError();\n        }\n        return this._node._value;\n    }\n    set pointer(newValue) {\n        if (this._node === this._header) {\n            throwIteratorAccessError();\n        }\n        this._node._value = newValue;\n    }\n    copy() {\n        return new LinkListIterator(this._node, this._header, this.container, this.iteratorType);\n    }\n}\nclass LinkList extends SequentialContainer {\n    constructor(container = []) {\n        super();\n        this._header = {};\n        this._head = this._tail = this._header._pre = this._header._next = this._header;\n        const self = this;\n        container.forEach(function (el) {\n            self.pushBack(el);\n        });\n    }\n    /**\n     * @internal\n     */\n    _eraseNode(node) {\n        const { _pre, _next } = node;\n        _pre._next = _next;\n        _next._pre = _pre;\n        if (node === this._head) {\n            this._head = _next;\n        }\n        if (node === this._tail) {\n            this._tail = _pre;\n        }\n        this._length -= 1;\n    }\n    /**\n     * @internal\n     */\n    _insertNode(value, pre) {\n        const next = pre._next;\n        const node = {\n            _value: value,\n            _pre: pre,\n            _next: next\n        };\n        pre._next = node;\n        next._pre = node;\n        if (pre === this._header) {\n            this._head = node;\n        }\n        if (next === this._header) {\n            this._tail = node;\n        }\n        this._length += 1;\n    }\n    clear() {\n        this._length = 0;\n        this._head = this._tail = this._header._pre = this._header._next = this._header;\n    }\n    begin() {\n        return new LinkListIterator(this._head, this._header, this);\n    }\n    end() {\n        return new LinkListIterator(this._header, this._header, this);\n    }\n    rBegin() {\n        return new LinkListIterator(this._tail, this._header, this, 1 /* IteratorType.REVERSE */);\n    }\n    rEnd() {\n        return new LinkListIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    }\n    front() {\n        return this._head._value;\n    }\n    back() {\n        return this._tail._value;\n    }\n    getElementByPos(pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        let curNode = this._head;\n        while (pos--) {\n            curNode = curNode._next;\n        }\n        return curNode._value;\n    }\n    eraseElementByPos(pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        let curNode = this._head;\n        while (pos--) {\n            curNode = curNode._next;\n        }\n        this._eraseNode(curNode);\n        return this._length;\n    }\n    eraseElementByValue(_value) {\n        let curNode = this._head;\n        while (curNode !== this._header) {\n            if (curNode._value === _value) {\n                this._eraseNode(curNode);\n            }\n            curNode = curNode._next;\n        }\n        return this._length;\n    }\n    eraseElementByIterator(iter) {\n        const node = iter._node;\n        if (node === this._header) {\n            throwIteratorAccessError();\n        }\n        iter = iter.next();\n        this._eraseNode(node);\n        return iter;\n    }\n    pushBack(element) {\n        this._insertNode(element, this._tail);\n        return this._length;\n    }\n    popBack() {\n        if (this._length === 0)\n            return;\n        const value = this._tail._value;\n        this._eraseNode(this._tail);\n        return value;\n    }\n    /**\n     * @description Push an element to the front.\n     * @param element - The element you want to push.\n     * @returns The size of queue after pushing.\n     */\n    pushFront(element) {\n        this._insertNode(element, this._header);\n        return this._length;\n    }\n    /**\n     * @description Removes the first element.\n     * @returns The element you popped.\n     */\n    popFront() {\n        if (this._length === 0)\n            return;\n        const value = this._head._value;\n        this._eraseNode(this._head);\n        return value;\n    }\n    setElementByPos(pos, element) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        let curNode = this._head;\n        while (pos--) {\n            curNode = curNode._next;\n        }\n        curNode._value = element;\n    }\n    insert(pos, element, num = 1) {\n        if (pos < 0 || pos > this._length) {\n            throw new RangeError();\n        }\n        if (num <= 0)\n            return this._length;\n        if (pos === 0) {\n            while (num--)\n                this.pushFront(element);\n        }\n        else if (pos === this._length) {\n            while (num--)\n                this.pushBack(element);\n        }\n        else {\n            let curNode = this._head;\n            for (let i = 1; i < pos; ++i) {\n                curNode = curNode._next;\n            }\n            const next = curNode._next;\n            this._length += num;\n            while (num--) {\n                curNode._next = {\n                    _value: element,\n                    _pre: curNode\n                };\n                curNode._next._pre = curNode;\n                curNode = curNode._next;\n            }\n            curNode._next = next;\n            next._pre = curNode;\n        }\n        return this._length;\n    }\n    find(element) {\n        let curNode = this._head;\n        while (curNode !== this._header) {\n            if (curNode._value === element) {\n                return new LinkListIterator(curNode, this._header, this);\n            }\n            curNode = curNode._next;\n        }\n        return this.end();\n    }\n    reverse() {\n        if (this._length <= 1)\n            return;\n        let pHead = this._head;\n        let pTail = this._tail;\n        let cnt = 0;\n        while ((cnt << 1) < this._length) {\n            const tmp = pHead._value;\n            pHead._value = pTail._value;\n            pTail._value = tmp;\n            pHead = pHead._next;\n            pTail = pTail._pre;\n            cnt += 1;\n        }\n    }\n    unique() {\n        if (this._length <= 1) {\n            return this._length;\n        }\n        let curNode = this._head;\n        while (curNode !== this._header) {\n            let tmpNode = curNode;\n            while (tmpNode._next !== this._header &&\n                tmpNode._value === tmpNode._next._value) {\n                tmpNode = tmpNode._next;\n                this._length -= 1;\n            }\n            curNode._next = tmpNode._next;\n            curNode._next._pre = curNode;\n            curNode = curNode._next;\n        }\n        return this._length;\n    }\n    sort(cmp) {\n        if (this._length <= 1)\n            return;\n        const arr = [];\n        this.forEach(function (el) {\n            arr.push(el);\n        });\n        arr.sort(cmp);\n        let curNode = this._head;\n        arr.forEach(function (element) {\n            curNode._value = element;\n            curNode = curNode._next;\n        });\n    }\n    /**\n     * @description Merges two sorted lists.\n     * @param list - The other list you want to merge (must be sorted).\n     * @returns The size of list after merging.\n     * @example\n     * const linkA = new LinkList([1, 3, 5]);\n     * const linkB = new LinkList([2, 4, 6]);\n     * linkA.merge(linkB);  // [1, 2, 3, 4, 5];\n     */\n    merge(list) {\n        const self = this;\n        if (this._length === 0) {\n            list.forEach(function (el) {\n                self.pushBack(el);\n            });\n        }\n        else {\n            let curNode = this._head;\n            list.forEach(function (el) {\n                while (curNode !== self._header &&\n                    curNode._value <= el) {\n                    curNode = curNode._next;\n                }\n                self._insertNode(el, curNode._pre);\n            });\n        }\n        return this._length;\n    }\n    forEach(callback) {\n        let curNode = this._head;\n        let index = 0;\n        while (curNode !== this._header) {\n            callback(curNode._value, index++, this);\n            curNode = curNode._next;\n        }\n    }\n    [Symbol.iterator]() {\n        return function* () {\n            if (this._length === 0)\n                return;\n            let curNode = this._head;\n            while (curNode !== this._header) {\n                yield curNode._value;\n                curNode = curNode._next;\n            }\n        }.bind(this)();\n    }\n}\nexport default LinkList;\n","import SequentialContainer from './Base';\nimport { ContainerIterator, initContainer, IteratorType } from '@/container/ContainerBase';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\ntype LinkNode<T> = {\n  _value: T;\n  _pre: LinkNode<T>;\n  _next: LinkNode<T>;\n}\n\nclass LinkListIterator<T> extends ContainerIterator<T> {\n  readonly container: LinkList<T>;\n  /**\n   * @internal\n   */\n  _node: LinkNode<T>;\n  /**\n   * @internal\n   */\n  private readonly _header: LinkNode<T>;\n  /**\n   * @internal\n   */\n  constructor(\n    _node: LinkNode<T>,\n    _header: LinkNode<T>,\n    container: LinkList<T>,\n    iteratorType?: IteratorType\n  ) {\n    super(iteratorType);\n    this._node = _node;\n    this._header = _header;\n    this.container = container;\n    if (this.iteratorType === IteratorType.NORMAL) {\n      this.pre = function () {\n        if (this._node._pre === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next;\n        return this;\n      };\n    } else {\n      this.pre = function () {\n        if (this._node._next === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre;\n        return this;\n      };\n    }\n  }\n  get pointer() {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    return this._node._value;\n  }\n  set pointer(newValue: T) {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    this._node._value = newValue;\n  }\n  copy() {\n    return new LinkListIterator<T>(this._node, this._header, this.container, this.iteratorType);\n  }\n  // @ts-ignore\n  equals(iter: LinkListIterator<T>): boolean;\n  // @ts-ignore\n  pre(): this;\n  // @ts-ignore\n  next(): this;\n}\n\nexport type { LinkListIterator };\n\nclass LinkList<T> extends SequentialContainer<T> {\n  /**\n   * @internal\n   */\n  private _head: LinkNode<T>;\n  /**\n   * @internal\n   */\n  private _tail: LinkNode<T>;\n  /**\n   * @internal\n   */\n  private readonly _header: LinkNode<T>;\n  constructor(container: initContainer<T> = []) {\n    super();\n    this._header = <LinkNode<T>>{};\n    this._head = this._tail = this._header._pre = this._header._next = this._header;\n    const self = this;\n    container.forEach(function (el) {\n      self.pushBack(el);\n    });\n  }\n  /**\n   * @internal\n   */\n  private _eraseNode(node: LinkNode<T>) {\n    const { _pre, _next } = node;\n    _pre._next = _next;\n    _next._pre = _pre;\n    if (node === this._head) {\n      this._head = _next;\n    }\n    if (node === this._tail) {\n      this._tail = _pre;\n    }\n    this._length -= 1;\n  }\n  /**\n   * @internal\n   */\n  private _insertNode(value: T, pre: LinkNode<T>) {\n    const next = pre._next;\n    const node = {\n      _value: value,\n      _pre: pre,\n      _next: next\n    };\n    pre._next = node;\n    next._pre = node;\n    if (pre === this._header) {\n      this._head = node;\n    }\n    if (next === this._header) {\n      this._tail = node;\n    }\n    this._length += 1;\n  }\n  clear() {\n    this._length = 0;\n    this._head = this._tail = this._header._pre = this._header._next = this._header;\n  }\n  begin() {\n    return new LinkListIterator<T>(this._head, this._header, this);\n  }\n  end() {\n    return new LinkListIterator<T>(this._header, this._header, this);\n  }\n  rBegin() {\n    return new LinkListIterator<T>(this._tail, this._header, this, IteratorType.REVERSE);\n  }\n  rEnd() {\n    return new LinkListIterator<T>(this._header, this._header, this, IteratorType.REVERSE);\n  }\n  front(): T | undefined {\n    return this._head._value;\n  }\n  back(): T | undefined {\n    return this._tail._value;\n  }\n  getElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let curNode = this._head;\n    while (pos--) {\n      curNode = curNode._next;\n    }\n    return curNode._value;\n  }\n  eraseElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let curNode = this._head;\n    while (pos--) {\n      curNode = curNode._next;\n    }\n    this._eraseNode(curNode);\n    return this._length;\n  }\n  eraseElementByValue(_value: T) {\n    let curNode = this._head;\n    while (curNode !== this._header) {\n      if (curNode._value === _value) {\n        this._eraseNode(curNode);\n      }\n      curNode = curNode._next;\n    }\n    return this._length;\n  }\n  eraseElementByIterator(iter: LinkListIterator<T>) {\n    const node = iter._node;\n    if (node === this._header) {\n      throwIteratorAccessError();\n    }\n    iter = iter.next();\n    this._eraseNode(node);\n    return iter;\n  }\n  pushBack(element: T) {\n    this._insertNode(element, this._tail);\n    return this._length;\n  }\n  popBack() {\n    if (this._length === 0) return;\n    const value = this._tail._value;\n    this._eraseNode(this._tail);\n    return value;\n  }\n  /**\n   * @description Push an element to the front.\n   * @param element - The element you want to push.\n   * @returns The size of queue after pushing.\n   */\n  pushFront(element: T) {\n    this._insertNode(element, this._header);\n    return this._length;\n  }\n  /**\n   * @description Removes the first element.\n   * @returns The element you popped.\n   */\n  popFront() {\n    if (this._length === 0) return;\n    const value = this._head._value;\n    this._eraseNode(this._head);\n    return value;\n  }\n  setElementByPos(pos: number, element: T) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let curNode = this._head;\n    while (pos--) {\n      curNode = curNode._next;\n    }\n    curNode._value = element;\n  }\n  insert(pos: number, element: T, num = 1) {\n    $checkWithinAccessParams!(pos, 0, this._length);\n    if (num <= 0) return this._length;\n    if (pos === 0) {\n      while (num--) this.pushFront(element);\n    } else if (pos === this._length) {\n      while (num--) this.pushBack(element);\n    } else {\n      let curNode = this._head;\n      for (let i = 1; i < pos; ++i) {\n        curNode = curNode._next;\n      }\n      const next = curNode._next;\n      this._length += num;\n      while (num--) {\n        curNode._next = <LinkNode<T>>{\n          _value: element,\n          _pre: curNode\n        };\n        curNode._next._pre = curNode;\n        curNode = curNode._next;\n      }\n      curNode._next = next;\n      next._pre = curNode;\n    }\n    return this._length;\n  }\n  find(element: T) {\n    let curNode = this._head;\n    while (curNode !== this._header) {\n      if (curNode._value === element) {\n        return new LinkListIterator<T>(curNode, this._header, this);\n      }\n      curNode = curNode._next;\n    }\n    return this.end();\n  }\n  reverse() {\n    if (this._length <= 1) return;\n    let pHead = this._head;\n    let pTail = this._tail;\n    let cnt = 0;\n    while ((cnt << 1) < this._length) {\n      const tmp = pHead._value;\n      pHead._value = pTail._value;\n      pTail._value = tmp;\n      pHead = pHead._next;\n      pTail = pTail._pre;\n      cnt += 1;\n    }\n  }\n  unique() {\n    if (this._length <= 1) {\n      return this._length;\n    }\n    let curNode = this._head;\n    while (curNode !== this._header) {\n      let tmpNode = curNode;\n      while (\n        tmpNode._next !== this._header &&\n        tmpNode._value === tmpNode._next._value\n      ) {\n        tmpNode = tmpNode._next;\n        this._length -= 1;\n      }\n      curNode._next = tmpNode._next;\n      curNode._next._pre = curNode;\n      curNode = curNode._next;\n    }\n    return this._length;\n  }\n  sort(cmp?: (x: T, y: T) => number) {\n    if (this._length <= 1) return;\n    const arr: T[] = [];\n    this.forEach(function (el) {\n      arr.push(el);\n    });\n    arr.sort(cmp);\n    let curNode: LinkNode<T> = this._head;\n    arr.forEach(function (element) {\n      curNode._value = element;\n      curNode = curNode._next;\n    });\n  }\n  /**\n   * @description Merges two sorted lists.\n   * @param list - The other list you want to merge (must be sorted).\n   * @returns The size of list after merging.\n   * @example\n   * const linkA = new LinkList([1, 3, 5]);\n   * const linkB = new LinkList([2, 4, 6]);\n   * linkA.merge(linkB);  // [1, 2, 3, 4, 5];\n   */\n  merge(list: LinkList<T>) {\n    const self = this;\n    if (this._length === 0) {\n      list.forEach(function (el) {\n        self.pushBack(el);\n      });\n    } else {\n      let curNode = this._head;\n      list.forEach(function (el) {\n        while (\n          curNode !== self._header &&\n          curNode._value <= el\n        ) {\n          curNode = curNode._next;\n        }\n        self._insertNode(el, curNode._pre);\n      });\n    }\n    return this._length;\n  }\n  forEach(callback: (element: T, index: number, list: LinkList<T>) => void) {\n    let curNode = this._head;\n    let index = 0;\n    while (curNode !== this._header) {\n      callback(curNode._value, index++, this);\n      curNode = curNode._next;\n    }\n  }\n  [Symbol.iterator]() {\n    return function * (this: LinkList<T>) {\n      if (this._length === 0) return;\n      let curNode = this._head;\n      while (curNode !== this._header) {\n        yield curNode._value;\n        curNode = curNode._next;\n      }\n    }.bind(this)();\n  }\n}\n\nexport default LinkList;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Vector.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Vector.d.ts
new file mode 100644
index 0000000..d26df41
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Vector.d.ts
@@ -0,0 +1,40 @@
+import SequentialContainer from './Base';
+import { initContainer, IteratorType } from "../ContainerBase";
+import { RandomIterator } from "./Base/RandomIterator";
+declare class VectorIterator<T> extends RandomIterator<T> {
+    container: Vector<T>;
+    constructor(node: number, container: Vector<T>, iteratorType?: IteratorType);
+    copy(): VectorIterator<T>;
+    equals(iter: VectorIterator<T>): boolean;
+}
+export type { VectorIterator };
+declare class Vector<T> extends SequentialContainer<T> {
+    /**
+     * @param container - Initialize container, must have a forEach function.
+     * @param copy - When the container is an array, you can choose to directly operate on the original object of
+     *               the array or perform a shallow copy. The default is shallow copy.
+     */
+    constructor(container?: initContainer<T>, copy?: boolean);
+    clear(): void;
+    begin(): VectorIterator<T>;
+    end(): VectorIterator<T>;
+    rBegin(): VectorIterator<T>;
+    rEnd(): VectorIterator<T>;
+    front(): T | undefined;
+    back(): T | undefined;
+    getElementByPos(pos: number): T;
+    eraseElementByPos(pos: number): number;
+    eraseElementByValue(value: T): number;
+    eraseElementByIterator(iter: VectorIterator<T>): VectorIterator<T>;
+    pushBack(element: T): number;
+    popBack(): T | undefined;
+    setElementByPos(pos: number, element: T): void;
+    insert(pos: number, element: T, num?: number): number;
+    find(element: T): VectorIterator<T>;
+    reverse(): void;
+    unique(): number;
+    sort(cmp?: (x: T, y: T) => number): void;
+    forEach(callback: (element: T, index: number, vector: Vector<T>) => void): void;
+    [Symbol.iterator](): Generator<T, void, undefined>;
+}
+export default Vector;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Vector.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Vector.js
new file mode 100644
index 0000000..b61d3a9
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Vector.js
@@ -0,0 +1,158 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _Base = _interopRequireDefault(require("./Base"));
+
+var _RandomIterator = require("./Base/RandomIterator");
+
+function _interopRequireDefault(t) {
+    return t && t.t ? t : {
+        default: t
+    };
+}
+
+class VectorIterator extends _RandomIterator.RandomIterator {
+    constructor(t, r, e) {
+        super(t, e);
+        this.container = r;
+    }
+    copy() {
+        return new VectorIterator(this.o, this.container, this.iteratorType);
+    }
+}
+
+class Vector extends _Base.default {
+    constructor(t = [], r = true) {
+        super();
+        if (Array.isArray(t)) {
+            this.J = r ? [ ...t ] : t;
+            this.i = t.length;
+        } else {
+            this.J = [];
+            const r = this;
+            t.forEach((function(t) {
+                r.pushBack(t);
+            }));
+        }
+    }
+    clear() {
+        this.i = 0;
+        this.J.length = 0;
+    }
+    begin() {
+        return new VectorIterator(0, this);
+    }
+    end() {
+        return new VectorIterator(this.i, this);
+    }
+    rBegin() {
+        return new VectorIterator(this.i - 1, this, 1);
+    }
+    rEnd() {
+        return new VectorIterator(-1, this, 1);
+    }
+    front() {
+        return this.J[0];
+    }
+    back() {
+        return this.J[this.i - 1];
+    }
+    getElementByPos(t) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        return this.J[t];
+    }
+    eraseElementByPos(t) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        this.J.splice(t, 1);
+        this.i -= 1;
+        return this.i;
+    }
+    eraseElementByValue(t) {
+        let r = 0;
+        for (let e = 0; e < this.i; ++e) {
+            if (this.J[e] !== t) {
+                this.J[r++] = this.J[e];
+            }
+        }
+        this.i = this.J.length = r;
+        return this.i;
+    }
+    eraseElementByIterator(t) {
+        const r = t.o;
+        t = t.next();
+        this.eraseElementByPos(r);
+        return t;
+    }
+    pushBack(t) {
+        this.J.push(t);
+        this.i += 1;
+        return this.i;
+    }
+    popBack() {
+        if (this.i === 0) return;
+        this.i -= 1;
+        return this.J.pop();
+    }
+    setElementByPos(t, r) {
+        if (t < 0 || t > this.i - 1) {
+            throw new RangeError;
+        }
+        this.J[t] = r;
+    }
+    insert(t, r, e = 1) {
+        if (t < 0 || t > this.i) {
+            throw new RangeError;
+        }
+        this.J.splice(t, 0, ...new Array(e).fill(r));
+        this.i += e;
+        return this.i;
+    }
+    find(t) {
+        for (let r = 0; r < this.i; ++r) {
+            if (this.J[r] === t) {
+                return new VectorIterator(r, this);
+            }
+        }
+        return this.end();
+    }
+    reverse() {
+        this.J.reverse();
+    }
+    unique() {
+        let t = 1;
+        for (let r = 1; r < this.i; ++r) {
+            if (this.J[r] !== this.J[r - 1]) {
+                this.J[t++] = this.J[r];
+            }
+        }
+        this.i = this.J.length = t;
+        return this.i;
+    }
+    sort(t) {
+        this.J.sort(t);
+    }
+    forEach(t) {
+        for (let r = 0; r < this.i; ++r) {
+            t(this.J[r], r, this);
+        }
+    }
+    [Symbol.iterator]() {
+        return function*() {
+            yield* this.J;
+        }.bind(this)();
+    }
+}
+
+var _default = Vector;
+
+exports.default = _default;
+//# sourceMappingURL=Vector.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Vector.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Vector.js.map
new file mode 100644
index 0000000..608c691
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Vector.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/SequentialContainer/Vector.js","../../src/container/SequentialContainer/Vector.ts"],"names":["Object","defineProperty","exports","value","default","_Base","_interopRequireDefault","require","_RandomIterator","obj","__esModule","VectorIterator","RandomIterator","constructor","node","container","iteratorType","super","this","copy","_node","Vector","SequentialContainer","Array","isArray","_vector","_length","length","self","forEach","el","pushBack","clear","begin","end","rBegin","rEnd","front","back","getElementByPos","pos","RangeError","eraseElementByPos","splice","eraseElementByValue","index","i","eraseElementByIterator","iter","next","element","push","popBack","pop","setElementByPos","insert","num","fill","find","reverse","unique","sort","cmp","callback","Symbol","iterator","bind","_default"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,eAAe;;ACLvB,IAAAC,QAAAC,uBAAAC,QAAA;;AAEA,IAAAC,kBAAAD,QAAA;;AAAqF,SAAAD,uBAAAG;IAAA,OAAAA,KAAAA,EAAAC,IAAAD,IAAA;QAAAL,SAAAK;;AAAA;;AAGrF,MAAME,uBAA0BC,gBAAAA;IAE9BC,YAAYC,GAAcC,GAAsBC;QAC9CC,MAAMH,GAAME;QACZE,KAAKH,YAAYA;ADFjB;ICIFI;QACE,OAAO,IAAIR,eAAkBO,KAAKE,GAAOF,KAAKH,WAAWG,KAAKF;ADF9D;;;ACUJ,MAAMK,eAAkBC,MAAAA;IAUtBT,YAAYE,IAA8B,IAAII,IAAO;QACnDF;QACA,IAAIM,MAAMC,QAAQT,IAAY;YAC5BG,KAAKO,IAAUN,IAAO,KAAIJ,MAAaA;YACvCG,KAAKQ,IAAUX,EAAUY;ADXvB,eCYG;YACLT,KAAKO,IAAU;YACf,MAAMG,IAAOV;YACbH,EAAUc,SAAQ,SAAUC;gBAC1BF,EAAKG,SAASD;ADVV;AACJ;AACJ;ICYFE;QACEd,KAAKQ,IAAU;QACfR,KAAKO,EAAQE,SAAS;ADVtB;ICYFM;QACE,OAAO,IAAItB,eAAkB,GAAGO;ADVhC;ICYFgB;QACE,OAAO,IAAIvB,eAAkBO,KAAKQ,GAASR;ADV3C;ICYFiB;QACE,OAAO,IAAIxB,eAAkBO,KAAKQ,IAAU,GAAGR,MAAI;ADVnD;ICYFkB;QACE,OAAO,IAAIzB,gBAAmB,GAAGO,MAAI;ADVrC;ICYFmB;QACE,OAAOnB,KAAKO,EAAQ;ADVpB;ICYFa;QACE,OAAOpB,KAAKO,EAAQP,KAAKQ,IAAU;ADVnC;ICYFa,gBAAgBC;QDVV,ICWsBA,IAAG,KAAHA,IAAQtB,KAAKQ,IAAO,GA3DpC;YAAE,MAAU,IAAIe;ADkDtB;QCUJ,OAAOvB,KAAKO,EAAQe;ADRpB;ICUFE,kBAAkBF;QDRZ,ICSsBA,IAAG,KAAHA,IAAQtB,KAAKQ,IAAO,GA/DpC;YAAE,MAAU,IAAIe;ADwDtB;QCQJvB,KAAKO,EAAQkB,OAAOH,GAAK;QACzBtB,KAAKQ,KAAW;QAChB,OAAOR,KAAKQ;ADNZ;ICQFkB,oBAAoBzC;QAClB,IAAI0C,IAAQ;QACZ,KAAK,IAAIC,IAAI,GAAGA,IAAI5B,KAAKQ,KAAWoB,GAAG;YACrC,IAAI5B,KAAKO,EAAQqB,OAAO3C,GAAO;gBAC7Be,KAAKO,EAAQoB,OAAW3B,KAAKO,EAAQqB;ADNjC;AACJ;QCQJ5B,KAAKQ,IAAUR,KAAKO,EAAQE,SAASkB;QACrC,OAAO3B,KAAKQ;ADNZ;ICQFqB,uBAAuBC;QACrB,MAAM5B,IAAQ4B,EAAK5B;QACnB4B,IAAOA,EAAKC;QACZ/B,KAAKwB,kBAAkBtB;QACvB,OAAO4B;ADNP;ICQFjB,SAASmB;QACPhC,KAAKO,EAAQ0B,KAAKD;QAClBhC,KAAKQ,KAAW;QAChB,OAAOR,KAAKQ;ADNZ;ICQF0B;QACE,IAAIlC,KAAKQ,MAAY,GAAG;QACxBR,KAAKQ,KAAW;QAChB,OAAOR,KAAKO,EAAQ4B;ADLpB;ICOFC,gBAAgBd,GAAaU;QDLvB,ICMsBV,IAAG,KAAHA,IAAQtB,KAAKQ,IAAO,GA/FpC;YAAE,MAAU,IAAIe;AD2FtB;QCKJvB,KAAKO,EAAQe,KAAOU;ADHpB;ICKFK,OAAOf,GAAaU,GAAYM,IAAM;QDHhC,ICIsBhB,IAAG,KAAHA,IAAQtB,KAAKQ,GAnG7B;YAAE,MAAU,IAAIe;ADiGtB;QCGJvB,KAAKO,EAAQkB,OAAOH,GAAK,MAAM,IAAIjB,MAASiC,GAAKC,KAAKP;QACtDhC,KAAKQ,KAAW8B;QAChB,OAAOtC,KAAKQ;ADDZ;ICGFgC,KAAKR;QACH,KAAK,IAAIJ,IAAI,GAAGA,IAAI5B,KAAKQ,KAAWoB,GAAG;YACrC,IAAI5B,KAAKO,EAAQqB,OAAOI,GAAS;gBAC/B,OAAO,IAAIvC,eAAkBmC,GAAG5B;ADD5B;AACJ;QCGJ,OAAOA,KAAKgB;ADDZ;ICGFyB;QACEzC,KAAKO,EAAQkC;ADDb;ICGFC;QACE,IAAIf,IAAQ;QACZ,KAAK,IAAIC,IAAI,GAAGA,IAAI5B,KAAKQ,KAAWoB,GAAG;YACrC,IAAI5B,KAAKO,EAAQqB,OAAO5B,KAAKO,EAAQqB,IAAI,IAAI;gBAC3C5B,KAAKO,EAAQoB,OAAW3B,KAAKO,EAAQqB;ADDjC;AACJ;QCGJ5B,KAAKQ,IAAUR,KAAKO,EAAQE,SAASkB;QACrC,OAAO3B,KAAKQ;ADDZ;ICGFmC,KAAKC;QACH5C,KAAKO,EAAQoC,KAAKC;ADDlB;ICGFjC,QAAQkC;QACN,KAAK,IAAIjB,IAAI,GAAGA,IAAI5B,KAAKQ,KAAWoB,GAAG;YACrCiB,EAAS7C,KAAKO,EAAQqB,IAAIA,GAAG5B;ADD3B;AACJ;ICGF,CAAC8C,OAAOC;QACN,OAAO;mBACG/C,KAAKO;ADDX,UCEFyC,KAAKhD,KAFA;ADCP;;;ACGH,IAAAiD,WAEc9C;;AAAMnB,QAAAE,UAAA+D","file":"Vector.js","sourcesContent":["import SequentialContainer from './Base';\nimport { RandomIterator } from \"./Base/RandomIterator\";\nimport $checkWithinAccessParams from \"../../utils/checkParams.macro\";\nclass VectorIterator extends RandomIterator {\n    constructor(node, container, iteratorType) {\n        super(node, iteratorType);\n        this.container = container;\n    }\n    copy() {\n        return new VectorIterator(this._node, this.container, this.iteratorType);\n    }\n}\nclass Vector extends SequentialContainer {\n    /**\n     * @param container - Initialize container, must have a forEach function.\n     * @param copy - When the container is an array, you can choose to directly operate on the original object of\n     *               the array or perform a shallow copy. The default is shallow copy.\n     */\n    constructor(container = [], copy = true) {\n        super();\n        if (Array.isArray(container)) {\n            this._vector = copy ? [...container] : container;\n            this._length = container.length;\n        }\n        else {\n            this._vector = [];\n            const self = this;\n            container.forEach(function (el) {\n                self.pushBack(el);\n            });\n        }\n    }\n    clear() {\n        this._length = 0;\n        this._vector.length = 0;\n    }\n    begin() {\n        return new VectorIterator(0, this);\n    }\n    end() {\n        return new VectorIterator(this._length, this);\n    }\n    rBegin() {\n        return new VectorIterator(this._length - 1, this, 1 /* IteratorType.REVERSE */);\n    }\n    rEnd() {\n        return new VectorIterator(-1, this, 1 /* IteratorType.REVERSE */);\n    }\n    front() {\n        return this._vector[0];\n    }\n    back() {\n        return this._vector[this._length - 1];\n    }\n    getElementByPos(pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        return this._vector[pos];\n    }\n    eraseElementByPos(pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        this._vector.splice(pos, 1);\n        this._length -= 1;\n        return this._length;\n    }\n    eraseElementByValue(value) {\n        let index = 0;\n        for (let i = 0; i < this._length; ++i) {\n            if (this._vector[i] !== value) {\n                this._vector[index++] = this._vector[i];\n            }\n        }\n        this._length = this._vector.length = index;\n        return this._length;\n    }\n    eraseElementByIterator(iter) {\n        const _node = iter._node;\n        iter = iter.next();\n        this.eraseElementByPos(_node);\n        return iter;\n    }\n    pushBack(element) {\n        this._vector.push(element);\n        this._length += 1;\n        return this._length;\n    }\n    popBack() {\n        if (this._length === 0)\n            return;\n        this._length -= 1;\n        return this._vector.pop();\n    }\n    setElementByPos(pos, element) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        this._vector[pos] = element;\n    }\n    insert(pos, element, num = 1) {\n        if (pos < 0 || pos > this._length) {\n            throw new RangeError();\n        }\n        this._vector.splice(pos, 0, ...new Array(num).fill(element));\n        this._length += num;\n        return this._length;\n    }\n    find(element) {\n        for (let i = 0; i < this._length; ++i) {\n            if (this._vector[i] === element) {\n                return new VectorIterator(i, this);\n            }\n        }\n        return this.end();\n    }\n    reverse() {\n        this._vector.reverse();\n    }\n    unique() {\n        let index = 1;\n        for (let i = 1; i < this._length; ++i) {\n            if (this._vector[i] !== this._vector[i - 1]) {\n                this._vector[index++] = this._vector[i];\n            }\n        }\n        this._length = this._vector.length = index;\n        return this._length;\n    }\n    sort(cmp) {\n        this._vector.sort(cmp);\n    }\n    forEach(callback) {\n        for (let i = 0; i < this._length; ++i) {\n            callback(this._vector[i], i, this);\n        }\n    }\n    [Symbol.iterator]() {\n        return function* () {\n            yield* this._vector;\n        }.bind(this)();\n    }\n}\nexport default Vector;\n","import SequentialContainer from './Base';\nimport { initContainer, IteratorType } from '@/container/ContainerBase';\nimport { RandomIterator } from '@/container/SequentialContainer/Base/RandomIterator';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\n\nclass VectorIterator<T> extends RandomIterator<T> {\n  container: Vector<T>;\n  constructor(node: number, container: Vector<T>, iteratorType?: IteratorType) {\n    super(node, iteratorType);\n    this.container = container;\n  }\n  copy() {\n    return new VectorIterator<T>(this._node, this.container, this.iteratorType);\n  }\n  // @ts-ignore\n  equals(iter: VectorIterator<T>): boolean;\n}\n\nexport type { VectorIterator };\n\nclass Vector<T> extends SequentialContainer<T> {\n  /**\n   * @internal\n   */\n  private readonly _vector: T[];\n  /**\n   * @param container - Initialize container, must have a forEach function.\n   * @param copy - When the container is an array, you can choose to directly operate on the original object of\n   *               the array or perform a shallow copy. The default is shallow copy.\n   */\n  constructor(container: initContainer<T> = [], copy = true) {\n    super();\n    if (Array.isArray(container)) {\n      this._vector = copy ? [...container] : container;\n      this._length = container.length;\n    } else {\n      this._vector = [];\n      const self = this;\n      container.forEach(function (el) {\n        self.pushBack(el);\n      });\n    }\n  }\n  clear() {\n    this._length = 0;\n    this._vector.length = 0;\n  }\n  begin() {\n    return new VectorIterator<T>(0, this);\n  }\n  end() {\n    return new VectorIterator<T>(this._length, this);\n  }\n  rBegin() {\n    return new VectorIterator<T>(this._length - 1, this, IteratorType.REVERSE);\n  }\n  rEnd() {\n    return new VectorIterator<T>(-1, this, IteratorType.REVERSE);\n  }\n  front(): T | undefined {\n    return this._vector[0];\n  }\n  back(): T | undefined {\n    return this._vector[this._length - 1];\n  }\n  getElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    return this._vector[pos];\n  }\n  eraseElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    this._vector.splice(pos, 1);\n    this._length -= 1;\n    return this._length;\n  }\n  eraseElementByValue(value: T) {\n    let index = 0;\n    for (let i = 0; i < this._length; ++i) {\n      if (this._vector[i] !== value) {\n        this._vector[index++] = this._vector[i];\n      }\n    }\n    this._length = this._vector.length = index;\n    return this._length;\n  }\n  eraseElementByIterator(iter: VectorIterator<T>) {\n    const _node = iter._node;\n    iter = iter.next();\n    this.eraseElementByPos(_node);\n    return iter;\n  }\n  pushBack(element: T) {\n    this._vector.push(element);\n    this._length += 1;\n    return this._length;\n  }\n  popBack() {\n    if (this._length === 0) return;\n    this._length -= 1;\n    return this._vector.pop();\n  }\n  setElementByPos(pos: number, element: T) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    this._vector[pos] = element;\n  }\n  insert(pos: number, element: T, num = 1) {\n    $checkWithinAccessParams!(pos, 0, this._length);\n    this._vector.splice(pos, 0, ...new Array<T>(num).fill(element));\n    this._length += num;\n    return this._length;\n  }\n  find(element: T) {\n    for (let i = 0; i < this._length; ++i) {\n      if (this._vector[i] === element) {\n        return new VectorIterator<T>(i, this);\n      }\n    }\n    return this.end();\n  }\n  reverse() {\n    this._vector.reverse();\n  }\n  unique() {\n    let index = 1;\n    for (let i = 1; i < this._length; ++i) {\n      if (this._vector[i] !== this._vector[i - 1]) {\n        this._vector[index++] = this._vector[i];\n      }\n    }\n    this._length = this._vector.length = index;\n    return this._length;\n  }\n  sort(cmp?: (x: T, y: T) => number) {\n    this._vector.sort(cmp);\n  }\n  forEach(callback: (element: T, index: number, vector: Vector<T>) => void) {\n    for (let i = 0; i < this._length; ++i) {\n      callback(this._vector[i], i, this);\n    }\n  }\n  [Symbol.iterator]() {\n    return function * (this: Vector<T>) {\n      yield * this._vector;\n    }.bind(this)();\n  }\n}\n\nexport default Vector;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeIterator.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeIterator.d.ts
new file mode 100644
index 0000000..e628857
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeIterator.d.ts
@@ -0,0 +1,18 @@
+import { ContainerIterator } from "../../ContainerBase";
+import TreeContainer from "./index";
+declare abstract class TreeIterator<K, V> extends ContainerIterator<K | [K, V]> {
+    abstract readonly container: TreeContainer<K, V>;
+    /**
+     * @description Get the sequential index of the iterator in the tree container.<br/>
+     *              <strong>Note:</strong>
+     *              This function only takes effect when the specified tree container `enableIndex = true`.
+     * @returns The index subscript of the node in the tree.
+     * @example
+     * const st = new OrderedSet([1, 2, 3], true);
+     * console.log(st.begin().next().index);  // 1
+     */
+    get index(): number;
+    pre(): this;
+    next(): this;
+}
+export default TreeIterator;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeIterator.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeIterator.js
new file mode 100644
index 0000000..f238b85
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeIterator.js
@@ -0,0 +1,80 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _ContainerBase = require("../../ContainerBase");
+
+var _throwError = require("../../../utils/throwError");
+
+class TreeIterator extends _ContainerBase.ContainerIterator {
+    constructor(t, r, i) {
+        super(i);
+        this.o = t;
+        this.h = r;
+        if (this.iteratorType === 0) {
+            this.pre = function() {
+                if (this.o === this.h.U) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.L();
+                return this;
+            };
+            this.next = function() {
+                if (this.o === this.h) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.B();
+                return this;
+            };
+        } else {
+            this.pre = function() {
+                if (this.o === this.h.W) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.B();
+                return this;
+            };
+            this.next = function() {
+                if (this.o === this.h) {
+                    (0, _throwError.throwIteratorAccessError)();
+                }
+                this.o = this.o.L();
+                return this;
+            };
+        }
+    }
+    get index() {
+        let t = this.o;
+        const r = this.h.tt;
+        if (t === this.h) {
+            if (r) {
+                return r.rt - 1;
+            }
+            return 0;
+        }
+        let i = 0;
+        if (t.U) {
+            i += t.U.rt;
+        }
+        while (t !== r) {
+            const r = t.tt;
+            if (t === r.W) {
+                i += 1;
+                if (r.U) {
+                    i += r.U.rt;
+                }
+            }
+            t = r;
+        }
+        return i;
+    }
+}
+
+var _default = TreeIterator;
+
+exports.default = _default;
+//# sourceMappingURL=TreeIterator.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeIterator.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeIterator.js.map
new file mode 100644
index 0000000..f5c9714
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeIterator.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/TreeContainer/Base/TreeIterator.js","../../src/container/TreeContainer/Base/TreeIterator.ts"],"names":["Object","defineProperty","exports","value","default","_ContainerBase","require","_throwError","TreeIterator","ContainerIterator","constructor","node","header","iteratorType","super","this","_node","_header","pre","_left","throwIteratorAccessError","_pre","next","_next","_right","index","root","_parent","_subTreeSize","_default"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,eAAe;;ACHvB,IAAAC,iBAAAC,QAAA;;AAEA,IAAAC,cAAAD,QAAA;;AAEA,MAAeE,qBAA2BC,eAAAA;IAaxCC,YACEC,GACAC,GACAC;QAEAC,MAAMD;QACNE,KAAKC,IAAQL;QACbI,KAAKE,IAAUL;QACf,IAAIG,KAAKF,iBAAY,GAA0B;YAC7CE,KAAKG,MAAM;gBACT,IAAIH,KAAKC,MAAUD,KAAKE,EAAQE,GAAO;qBACrC,GAAAC,YAAAA;ADhBM;gBCkBRL,KAAKC,IAAQD,KAAKC,EAAMK;gBACxB,OAAON;ADhBH;YCmBNA,KAAKO,OAAO;gBACV,IAAIP,KAAKC,MAAUD,KAAKE,GAAS;qBAC/B,GAAAG,YAAAA;ADjBM;gBCmBRL,KAAKC,IAAQD,KAAKC,EAAMO;gBACxB,OAAOR;ADjBH;AACJ,eCkBG;YACLA,KAAKG,MAAM;gBACT,IAAIH,KAAKC,MAAUD,KAAKE,EAAQO,GAAQ;qBACtC,GAAAJ,YAAAA;ADhBM;gBCkBRL,KAAKC,IAAQD,KAAKC,EAAMO;gBACxB,OAAOR;ADhBH;YCmBNA,KAAKO,OAAO;gBACV,IAAIP,KAAKC,MAAUD,KAAKE,GAAS;qBAC/B,GAAAG,YAAAA;ADjBM;gBCmBRL,KAAKC,IAAQD,KAAKC,EAAMK;gBACxB,OAAON;ADjBH;AACJ;AACJ;IC4BEU;QACF,IAAIT,IAAQD,KAAKC;QACjB,MAAMU,IAAOX,KAAKE,EAAQU;QAC1B,IAAIX,MAAUD,KAAKE,GAAS;YAC1B,IAAIS,GAAM;gBACR,OAAOA,EAAKE,KAAe;ADjBvB;YCmBN,OAAO;ADjBL;QCmBJ,IAAIH,IAAQ;QACZ,IAAIT,EAAMG,GAAO;YACfM,KAAUT,EAAMG,EAAoCS;ADjBlD;QCmBJ,OAAOZ,MAAUU,GAAM;YACrB,MAAMC,IAAUX,EAAMW;YACtB,IAAIX,MAAUW,EAAQH,GAAQ;gBAC5BC,KAAS;gBACT,IAAIE,EAAQR,GAAO;oBACjBM,KAAUE,EAAQR,EAAoCS;ADjBhD;AACJ;YCmBNZ,IAAQW;ADjBN;QCmBJ,OAAOF;ADjBP;;;ACuBH,IAAAI,WAEcrB;;AAAYN,QAAAE,UAAAyB","file":"TreeIterator.js","sourcesContent":["import { ContainerIterator } from \"../../ContainerBase\";\nimport { throwIteratorAccessError } from \"../../../utils/throwError\";\nclass TreeIterator extends ContainerIterator {\n    /**\n     * @internal\n     */\n    constructor(node, header, iteratorType) {\n        super(iteratorType);\n        this._node = node;\n        this._header = header;\n        if (this.iteratorType === 0 /* IteratorType.NORMAL */) {\n            this.pre = function () {\n                if (this._node === this._header._left) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre();\n                return this;\n            };\n            this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next();\n                return this;\n            };\n        }\n        else {\n            this.pre = function () {\n                if (this._node === this._header._right) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next();\n                return this;\n            };\n            this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre();\n                return this;\n            };\n        }\n    }\n    /**\n     * @description Get the sequential index of the iterator in the tree container.<br/>\n     *              <strong>Note:</strong>\n     *              This function only takes effect when the specified tree container `enableIndex = true`.\n     * @returns The index subscript of the node in the tree.\n     * @example\n     * const st = new OrderedSet([1, 2, 3], true);\n     * console.log(st.begin().next().index);  // 1\n     */\n    get index() {\n        let _node = this._node;\n        const root = this._header._parent;\n        if (_node === this._header) {\n            if (root) {\n                return root._subTreeSize - 1;\n            }\n            return 0;\n        }\n        let index = 0;\n        if (_node._left) {\n            index += _node._left._subTreeSize;\n        }\n        while (_node !== root) {\n            const _parent = _node._parent;\n            if (_node === _parent._right) {\n                index += 1;\n                if (_parent._left) {\n                    index += _parent._left._subTreeSize;\n                }\n            }\n            _node = _parent;\n        }\n        return index;\n    }\n}\nexport default TreeIterator;\n","import { TreeNode } from './TreeNode';\nimport type { TreeNodeEnableIndex } from './TreeNode';\nimport { ContainerIterator, IteratorType } from '@/container/ContainerBase';\nimport TreeContainer from '@/container/TreeContainer/Base/index';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nabstract class TreeIterator<K, V> extends ContainerIterator<K | [K, V]> {\n  abstract readonly container: TreeContainer<K, V>;\n  /**\n   * @internal\n   */\n  _node: TreeNode<K, V>;\n  /**\n   * @internal\n   */\n  protected _header: TreeNode<K, V>;\n  /**\n   * @internal\n   */\n  protected constructor(\n    node: TreeNode<K, V>,\n    header: TreeNode<K, V>,\n    iteratorType?: IteratorType\n  ) {\n    super(iteratorType);\n    this._node = node;\n    this._header = header;\n    if (this.iteratorType === IteratorType.NORMAL) {\n      this.pre = function () {\n        if (this._node === this._header._left) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre();\n        return this;\n      };\n\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next();\n        return this;\n      };\n    } else {\n      this.pre = function () {\n        if (this._node === this._header._right) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next();\n        return this;\n      };\n\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre();\n        return this;\n      };\n    }\n  }\n  /**\n   * @description Get the sequential index of the iterator in the tree container.<br/>\n   *              <strong>Note:</strong>\n   *              This function only takes effect when the specified tree container `enableIndex = true`.\n   * @returns The index subscript of the node in the tree.\n   * @example\n   * const st = new OrderedSet([1, 2, 3], true);\n   * console.log(st.begin().next().index);  // 1\n   */\n  get index() {\n    let _node = this._node as TreeNodeEnableIndex<K, V>;\n    const root = this._header._parent as TreeNodeEnableIndex<K, V>;\n    if (_node === this._header) {\n      if (root) {\n        return root._subTreeSize - 1;\n      }\n      return 0;\n    }\n    let index = 0;\n    if (_node._left) {\n      index += (_node._left as TreeNodeEnableIndex<K, V>)._subTreeSize;\n    }\n    while (_node !== root) {\n      const _parent = _node._parent as TreeNodeEnableIndex<K, V>;\n      if (_node === _parent._right) {\n        index += 1;\n        if (_parent._left) {\n          index += (_parent._left as TreeNodeEnableIndex<K, V>)._subTreeSize;\n        }\n      }\n      _node = _parent;\n    }\n    return index;\n  }\n  // @ts-ignore\n  pre(): this;\n  // @ts-ignore\n  next(): this;\n}\n\nexport default TreeIterator;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeNode.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeNode.d.ts
new file mode 100644
index 0000000..d0aec50
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeNode.d.ts
@@ -0,0 +1,47 @@
+export declare const enum TreeNodeColor {
+    RED = 1,
+    BLACK = 0
+}
+export declare class TreeNode<K, V> {
+    _color: TreeNodeColor;
+    _key: K | undefined;
+    _value: V | undefined;
+    _left: TreeNode<K, V> | undefined;
+    _right: TreeNode<K, V> | undefined;
+    _parent: TreeNode<K, V> | undefined;
+    constructor(key?: K, value?: V);
+    /**
+     * @description Get the pre node.
+     * @returns TreeNode about the pre node.
+     */
+    _pre(): TreeNode<K, V>;
+    /**
+     * @description Get the next node.
+     * @returns TreeNode about the next node.
+     */
+    _next(): TreeNode<K, V>;
+    /**
+     * @description Rotate left.
+     * @returns TreeNode about moved to original position after rotation.
+     */
+    _rotateLeft(): TreeNode<K, V>;
+    /**
+     * @description Rotate right.
+     * @returns TreeNode about moved to original position after rotation.
+     */
+    _rotateRight(): TreeNode<K, V>;
+}
+export declare class TreeNodeEnableIndex<K, V> extends TreeNode<K, V> {
+    _subTreeSize: number;
+    /**
+     * @description Rotate left and do recount.
+     * @returns TreeNode about moved to original position after rotation.
+     */
+    _rotateLeft(): TreeNodeEnableIndex<K, V>;
+    /**
+     * @description Rotate right and do recount.
+     * @returns TreeNode about moved to original position after rotation.
+     */
+    _rotateRight(): TreeNodeEnableIndex<K, V>;
+    _recount(): void;
+}
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeNode.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeNode.js
new file mode 100644
index 0000000..108fcf1
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeNode.js
@@ -0,0 +1,115 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.TreeNodeEnableIndex = exports.TreeNode = void 0;
+
+class TreeNode {
+    constructor(e, t) {
+        this.ee = 1;
+        this.u = undefined;
+        this.l = undefined;
+        this.U = undefined;
+        this.W = undefined;
+        this.tt = undefined;
+        this.u = e;
+        this.l = t;
+    }
+    L() {
+        let e = this;
+        if (e.ee === 1 && e.tt.tt === e) {
+            e = e.W;
+        } else if (e.U) {
+            e = e.U;
+            while (e.W) {
+                e = e.W;
+            }
+        } else {
+            let t = e.tt;
+            while (t.U === e) {
+                e = t;
+                t = e.tt;
+            }
+            e = t;
+        }
+        return e;
+    }
+    B() {
+        let e = this;
+        if (e.W) {
+            e = e.W;
+            while (e.U) {
+                e = e.U;
+            }
+            return e;
+        } else {
+            let t = e.tt;
+            while (t.W === e) {
+                e = t;
+                t = e.tt;
+            }
+            if (e.W !== t) {
+                return t;
+            } else return e;
+        }
+    }
+    te() {
+        const e = this.tt;
+        const t = this.W;
+        const s = t.U;
+        if (e.tt === this) e.tt = t; else if (e.U === this) e.U = t; else e.W = t;
+        t.tt = e;
+        t.U = this;
+        this.tt = t;
+        this.W = s;
+        if (s) s.tt = this;
+        return t;
+    }
+    se() {
+        const e = this.tt;
+        const t = this.U;
+        const s = t.W;
+        if (e.tt === this) e.tt = t; else if (e.U === this) e.U = t; else e.W = t;
+        t.tt = e;
+        t.W = this;
+        this.tt = t;
+        this.U = s;
+        if (s) s.tt = this;
+        return t;
+    }
+}
+
+exports.TreeNode = TreeNode;
+
+class TreeNodeEnableIndex extends TreeNode {
+    constructor() {
+        super(...arguments);
+        this.rt = 1;
+    }
+    te() {
+        const e = super.te();
+        this.ie();
+        e.ie();
+        return e;
+    }
+    se() {
+        const e = super.se();
+        this.ie();
+        e.ie();
+        return e;
+    }
+    ie() {
+        this.rt = 1;
+        if (this.U) {
+            this.rt += this.U.rt;
+        }
+        if (this.W) {
+            this.rt += this.W.rt;
+        }
+    }
+}
+
+exports.TreeNodeEnableIndex = TreeNodeEnableIndex;
+//# sourceMappingURL=TreeNode.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeNode.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeNode.js.map
new file mode 100644
index 0000000..0a115c6
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeNode.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/TreeContainer/Base/TreeNode.js","../../src/container/TreeContainer/Base/TreeNode.ts"],"names":["Object","defineProperty","exports","value","TreeNodeEnableIndex","TreeNode","constructor","key","this","_color","_key","undefined","_value","_left","_right","_parent","_pre","preNode","pre","_next","nextNode","_rotateLeft","PP","V","R","_rotateRight","F","K","super","arguments","_subTreeSize","parent","_recount"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,sBAAsBF,QAAQG,gBAAgB;;ACAhD,MAAOA;IAOXC,YAAYC,GAASJ;QANrBK,KAAAC,KAAM;QACND,KAAAE,IAAsBC;QACtBH,KAAAI,IAAwBD;QACxBH,KAAAK,IAAoCF;QACpCH,KAAAM,IAAqCH;QACrCH,KAAAO,KAAsCJ;QAEpCH,KAAKE,IAAOH;QACZC,KAAKI,IAAST;ADJd;ICUFa;QACE,IAAIC,IAA0BT;QAC9B,IACES,EAAQR,OAAM,KACdQ,EAAQF,GAASA,OAAYE,GAC7B;YACAA,IAAUA,EAAQH;ADNhB,eCOG,IAAIG,EAAQJ,GAAO;YACxBI,IAAUA,EAAQJ;YAClB,OAAOI,EAAQH,GAAQ;gBACrBG,IAAUA,EAAQH;ADLd;AACJ,eCMG;YACL,IAAII,IAAMD,EAAQF;YAClB,OAAOG,EAAIL,MAAUI,GAAS;gBAC5BA,IAAUC;gBACVA,IAAMD,EAAQF;ADJV;YCMNE,IAAUC;ADJR;QCMJ,OAAOD;ADJP;ICUFE;QACE,IAAIC,IAA2BZ;QAC/B,IAAIY,EAASN,GAAQ;YACnBM,IAAWA,EAASN;YACpB,OAAOM,EAASP,GAAO;gBACrBO,IAAWA,EAASP;ADJhB;YCMN,OAAOO;ADJL,eCKG;YACL,IAAIF,IAAME,EAASL;YACnB,OAAOG,EAAIJ,MAAWM,GAAU;gBAC9BA,IAAWF;gBACXA,IAAME,EAASL;ADHX;YCKN,IAAIK,EAASN,MAAWI,GAAK;gBAC3B,OAAOA;ADHH,mBCIC,OAAOE;ADDZ;AACJ;ICOFC;QACE,MAAMC,IAAKd,KAAKO;QAChB,MAAMQ,IAAIf,KAAKM;QACf,MAAMU,IAAID,EAAEV;QAEZ,IAAIS,EAAGP,OAAYP,MAAMc,EAAGP,KAAUQ,QACjC,IAAID,EAAGT,MAAUL,MAAMc,EAAGT,IAAQU,QAClCD,EAAGR,IAASS;QAEjBA,EAAER,KAAUO;QACZC,EAAEV,IAAQL;QAEVA,KAAKO,KAAUQ;QACff,KAAKM,IAASU;QAEd,IAAIA,GAAGA,EAAET,KAAUP;QAEnB,OAAOe;ADFP;ICQFE;QACE,MAAMH,IAAKd,KAAKO;QAChB,MAAMW,IAAIlB,KAAKK;QACf,MAAMc,IAAID,EAAEZ;QAEZ,IAAIQ,EAAGP,OAAYP,MAAMc,EAAGP,KAAUW,QACjC,IAAIJ,EAAGT,MAAUL,MAAMc,EAAGT,IAAQa,QAClCJ,EAAGR,IAASY;QAEjBA,EAAEX,KAAUO;QACZI,EAAEZ,IAASN;QAEXA,KAAKO,KAAUW;QACflB,KAAKK,IAAQc;QAEb,IAAIA,GAAGA,EAAEZ,KAAUP;QAEnB,OAAOkB;ADHP;;;ACKHxB,QAAAG,WAAAA;;AAEK,MAAOD,4BAAkCC;IAA/CC;QDHQsB,SAASC;QCIfrB,KAAAsB,KAAe;AA8BjB;IAzBET;QACE,MAAMU,IAASH,MAAMP;QACrBb,KAAKwB;QACLD,EAAOC;QACP,OAAOD;ADDP;ICOFN;QACE,MAAMM,IAASH,MAAMH;QACrBjB,KAAKwB;QACLD,EAAOC;QACP,OAAOD;ADDP;ICGFC;QACExB,KAAKsB,KAAe;QACpB,IAAItB,KAAKK,GAAO;YACdL,KAAKsB,MAAiBtB,KAAKK,EAAoCiB;ADD7D;QCGJ,IAAItB,KAAKM,GAAQ;YACfN,KAAKsB,MAAiBtB,KAAKM,EAAqCgB;ADD9D;AACJ;;;ACGH5B,QAAAE,sBAAAA","file":"TreeNode.js","sourcesContent":["export class TreeNode {\n    constructor(key, value) {\n        this._color = 1 /* TreeNodeColor.RED */;\n        this._key = undefined;\n        this._value = undefined;\n        this._left = undefined;\n        this._right = undefined;\n        this._parent = undefined;\n        this._key = key;\n        this._value = value;\n    }\n    /**\n     * @description Get the pre node.\n     * @returns TreeNode about the pre node.\n     */\n    _pre() {\n        let preNode = this;\n        if (preNode._color === 1 /* TreeNodeColor.RED */ &&\n            preNode._parent._parent === preNode) {\n            preNode = preNode._right;\n        }\n        else if (preNode._left) {\n            preNode = preNode._left;\n            while (preNode._right) {\n                preNode = preNode._right;\n            }\n        }\n        else {\n            let pre = preNode._parent;\n            while (pre._left === preNode) {\n                preNode = pre;\n                pre = preNode._parent;\n            }\n            preNode = pre;\n        }\n        return preNode;\n    }\n    /**\n     * @description Get the next node.\n     * @returns TreeNode about the next node.\n     */\n    _next() {\n        let nextNode = this;\n        if (nextNode._right) {\n            nextNode = nextNode._right;\n            while (nextNode._left) {\n                nextNode = nextNode._left;\n            }\n            return nextNode;\n        }\n        else {\n            let pre = nextNode._parent;\n            while (pre._right === nextNode) {\n                nextNode = pre;\n                pre = nextNode._parent;\n            }\n            if (nextNode._right !== pre) {\n                return pre;\n            }\n            else\n                return nextNode;\n        }\n    }\n    /**\n     * @description Rotate left.\n     * @returns TreeNode about moved to original position after rotation.\n     */\n    _rotateLeft() {\n        const PP = this._parent;\n        const V = this._right;\n        const R = V._left;\n        if (PP._parent === this)\n            PP._parent = V;\n        else if (PP._left === this)\n            PP._left = V;\n        else\n            PP._right = V;\n        V._parent = PP;\n        V._left = this;\n        this._parent = V;\n        this._right = R;\n        if (R)\n            R._parent = this;\n        return V;\n    }\n    /**\n     * @description Rotate right.\n     * @returns TreeNode about moved to original position after rotation.\n     */\n    _rotateRight() {\n        const PP = this._parent;\n        const F = this._left;\n        const K = F._right;\n        if (PP._parent === this)\n            PP._parent = F;\n        else if (PP._left === this)\n            PP._left = F;\n        else\n            PP._right = F;\n        F._parent = PP;\n        F._right = this;\n        this._parent = F;\n        this._left = K;\n        if (K)\n            K._parent = this;\n        return F;\n    }\n}\nexport class TreeNodeEnableIndex extends TreeNode {\n    constructor() {\n        super(...arguments);\n        this._subTreeSize = 1;\n    }\n    /**\n     * @description Rotate left and do recount.\n     * @returns TreeNode about moved to original position after rotation.\n     */\n    _rotateLeft() {\n        const parent = super._rotateLeft();\n        this._recount();\n        parent._recount();\n        return parent;\n    }\n    /**\n     * @description Rotate right and do recount.\n     * @returns TreeNode about moved to original position after rotation.\n     */\n    _rotateRight() {\n        const parent = super._rotateRight();\n        this._recount();\n        parent._recount();\n        return parent;\n    }\n    _recount() {\n        this._subTreeSize = 1;\n        if (this._left) {\n            this._subTreeSize += this._left._subTreeSize;\n        }\n        if (this._right) {\n            this._subTreeSize += this._right._subTreeSize;\n        }\n    }\n}\n","export const enum TreeNodeColor {\n  RED = 1,\n  BLACK = 0\n}\n\nexport class TreeNode<K, V> {\n  _color = TreeNodeColor.RED;\n  _key: K | undefined = undefined;\n  _value: V | undefined = undefined;\n  _left: TreeNode<K, V> | undefined = undefined;\n  _right: TreeNode<K, V> | undefined = undefined;\n  _parent: TreeNode<K, V> | undefined = undefined;\n  constructor(key?: K, value?: V) {\n    this._key = key;\n    this._value = value;\n  }\n  /**\n   * @description Get the pre node.\n   * @returns TreeNode about the pre node.\n   */\n  _pre() {\n    let preNode: TreeNode<K, V> = this;\n    if (\n      preNode._color === TreeNodeColor.RED &&\n      preNode._parent!._parent === preNode\n    ) {\n      preNode = preNode._right!;\n    } else if (preNode._left) {\n      preNode = preNode._left;\n      while (preNode._right) {\n        preNode = preNode._right;\n      }\n    } else {\n      let pre = preNode._parent!;\n      while (pre._left === preNode) {\n        preNode = pre;\n        pre = preNode._parent!;\n      }\n      preNode = pre;\n    }\n    return preNode;\n  }\n  /**\n   * @description Get the next node.\n   * @returns TreeNode about the next node.\n   */\n  _next() {\n    let nextNode: TreeNode<K, V> = this;\n    if (nextNode._right) {\n      nextNode = nextNode._right;\n      while (nextNode._left) {\n        nextNode = nextNode._left;\n      }\n      return nextNode;\n    } else {\n      let pre = nextNode._parent!;\n      while (pre._right === nextNode) {\n        nextNode = pre;\n        pre = nextNode._parent!;\n      }\n      if (nextNode._right !== pre) {\n        return pre;\n      } else return nextNode;\n    }\n  }\n  /**\n   * @description Rotate left.\n   * @returns TreeNode about moved to original position after rotation.\n   */\n  _rotateLeft() {\n    const PP = this._parent!;\n    const V = this._right!;\n    const R = V._left;\n\n    if (PP._parent === this) PP._parent = V;\n    else if (PP._left === this) PP._left = V;\n    else PP._right = V;\n\n    V._parent = PP;\n    V._left = this;\n\n    this._parent = V;\n    this._right = R;\n\n    if (R) R._parent = this;\n\n    return V;\n  }\n  /**\n   * @description Rotate right.\n   * @returns TreeNode about moved to original position after rotation.\n   */\n  _rotateRight() {\n    const PP = this._parent!;\n    const F = this._left!;\n    const K = F._right;\n\n    if (PP._parent === this) PP._parent = F;\n    else if (PP._left === this) PP._left = F;\n    else PP._right = F;\n\n    F._parent = PP;\n    F._right = this;\n\n    this._parent = F;\n    this._left = K;\n\n    if (K) K._parent = this;\n\n    return F;\n  }\n}\n\nexport class TreeNodeEnableIndex<K, V> extends TreeNode<K, V> {\n  _subTreeSize = 1;\n  /**\n   * @description Rotate left and do recount.\n   * @returns TreeNode about moved to original position after rotation.\n   */\n  _rotateLeft() {\n    const parent = super._rotateLeft() as TreeNodeEnableIndex<K, V>;\n    this._recount();\n    parent._recount();\n    return parent;\n  }\n  /**\n   * @description Rotate right and do recount.\n   * @returns TreeNode about moved to original position after rotation.\n   */\n  _rotateRight() {\n    const parent = super._rotateRight() as TreeNodeEnableIndex<K, V>;\n    this._recount();\n    parent._recount();\n    return parent;\n  }\n  _recount() {\n    this._subTreeSize = 1;\n    if (this._left) {\n      this._subTreeSize += (this._left as TreeNodeEnableIndex<K, V>)._subTreeSize;\n    }\n    if (this._right) {\n      this._subTreeSize += (this._right as TreeNodeEnableIndex<K, V>)._subTreeSize;\n    }\n  }\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/index.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/index.d.ts
new file mode 100644
index 0000000..96e4792
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/index.d.ts
@@ -0,0 +1,58 @@
+import type TreeIterator from './TreeIterator';
+import { Container } from "../../ContainerBase";
+declare abstract class TreeContainer<K, V> extends Container<K | [K, V]> {
+    clear(): void;
+    /**
+     * @description Update node's key by iterator.
+     * @param iter - The iterator you want to change.
+     * @param key - The key you want to update.
+     * @returns Whether the modification is successful.
+     * @example
+     * const st = new orderedSet([1, 2, 5]);
+     * const iter = st.find(2);
+     * st.updateKeyByIterator(iter, 3); // then st will become [1, 3, 5]
+     */
+    updateKeyByIterator(iter: TreeIterator<K, V>, key: K): boolean;
+    eraseElementByPos(pos: number): number;
+    /**
+     * @description Remove the element of the specified key.
+     * @param key - The key you want to remove.
+     * @returns Whether erase successfully.
+     */
+    eraseElementByKey(key: K): boolean;
+    eraseElementByIterator(iter: TreeIterator<K, V>): TreeIterator<K, V>;
+    forEach(callback: (element: K | [K, V], index: number, tree: TreeContainer<K, V>) => void): void;
+    getElementByPos(pos: number): K | [K, V];
+    /**
+     * @description Get the height of the tree.
+     * @returns Number about the height of the RB-tree.
+     */
+    getHeight(): number;
+    /**
+     * @param key - The given key you want to compare.
+     * @returns An iterator to the first element less than the given key.
+     */
+    abstract reverseUpperBound(key: K): TreeIterator<K, V>;
+    /**
+     * @description Union the other tree to self.
+     * @param other - The other tree container you want to merge.
+     * @returns The size of the tree after union.
+     */
+    abstract union(other: TreeContainer<K, V>): number;
+    /**
+     * @param key - The given key you want to compare.
+     * @returns An iterator to the first element not greater than the given key.
+     */
+    abstract reverseLowerBound(key: K): TreeIterator<K, V>;
+    /**
+     * @param key - The given key you want to compare.
+     * @returns An iterator to the first element not less than the given key.
+     */
+    abstract lowerBound(key: K): TreeIterator<K, V>;
+    /**
+     * @param key - The given key you want to compare.
+     * @returns An iterator to the first element greater than the given key.
+     */
+    abstract upperBound(key: K): TreeIterator<K, V>;
+}
+export default TreeContainer;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/index.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/index.js
new file mode 100644
index 0000000..1ba0069
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/index.js
@@ -0,0 +1,514 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _TreeNode = require("./TreeNode");
+
+var _ContainerBase = require("../../ContainerBase");
+
+var _throwError = require("../../../utils/throwError");
+
+class TreeContainer extends _ContainerBase.Container {
+    constructor(e = function(e, t) {
+        if (e < t) return -1;
+        if (e > t) return 1;
+        return 0;
+    }, t = false) {
+        super();
+        this.Y = undefined;
+        this.v = e;
+        if (t) {
+            this.re = _TreeNode.TreeNodeEnableIndex;
+            this.M = function(e, t, i) {
+                const s = this.ne(e, t, i);
+                if (s) {
+                    let e = s.tt;
+                    while (e !== this.h) {
+                        e.rt += 1;
+                        e = e.tt;
+                    }
+                    const t = this.he(s);
+                    if (t) {
+                        const {parentNode: e, grandParent: i, curNode: s} = t;
+                        e.ie();
+                        i.ie();
+                        s.ie();
+                    }
+                }
+                return this.i;
+            };
+            this.V = function(e) {
+                let t = this.fe(e);
+                while (t !== this.h) {
+                    t.rt -= 1;
+                    t = t.tt;
+                }
+            };
+        } else {
+            this.re = _TreeNode.TreeNode;
+            this.M = function(e, t, i) {
+                const s = this.ne(e, t, i);
+                if (s) this.he(s);
+                return this.i;
+            };
+            this.V = this.fe;
+        }
+        this.h = new this.re;
+    }
+    X(e, t) {
+        let i = this.h;
+        while (e) {
+            const s = this.v(e.u, t);
+            if (s < 0) {
+                e = e.W;
+            } else if (s > 0) {
+                i = e;
+                e = e.U;
+            } else return e;
+        }
+        return i;
+    }
+    Z(e, t) {
+        let i = this.h;
+        while (e) {
+            const s = this.v(e.u, t);
+            if (s <= 0) {
+                e = e.W;
+            } else {
+                i = e;
+                e = e.U;
+            }
+        }
+        return i;
+    }
+    $(e, t) {
+        let i = this.h;
+        while (e) {
+            const s = this.v(e.u, t);
+            if (s < 0) {
+                i = e;
+                e = e.W;
+            } else if (s > 0) {
+                e = e.U;
+            } else return e;
+        }
+        return i;
+    }
+    rr(e, t) {
+        let i = this.h;
+        while (e) {
+            const s = this.v(e.u, t);
+            if (s < 0) {
+                i = e;
+                e = e.W;
+            } else {
+                e = e.U;
+            }
+        }
+        return i;
+    }
+    ue(e) {
+        while (true) {
+            const t = e.tt;
+            if (t === this.h) return;
+            if (e.ee === 1) {
+                e.ee = 0;
+                return;
+            }
+            if (e === t.U) {
+                const i = t.W;
+                if (i.ee === 1) {
+                    i.ee = 0;
+                    t.ee = 1;
+                    if (t === this.Y) {
+                        this.Y = t.te();
+                    } else t.te();
+                } else {
+                    if (i.W && i.W.ee === 1) {
+                        i.ee = t.ee;
+                        t.ee = 0;
+                        i.W.ee = 0;
+                        if (t === this.Y) {
+                            this.Y = t.te();
+                        } else t.te();
+                        return;
+                    } else if (i.U && i.U.ee === 1) {
+                        i.ee = 1;
+                        i.U.ee = 0;
+                        i.se();
+                    } else {
+                        i.ee = 1;
+                        e = t;
+                    }
+                }
+            } else {
+                const i = t.U;
+                if (i.ee === 1) {
+                    i.ee = 0;
+                    t.ee = 1;
+                    if (t === this.Y) {
+                        this.Y = t.se();
+                    } else t.se();
+                } else {
+                    if (i.U && i.U.ee === 1) {
+                        i.ee = t.ee;
+                        t.ee = 0;
+                        i.U.ee = 0;
+                        if (t === this.Y) {
+                            this.Y = t.se();
+                        } else t.se();
+                        return;
+                    } else if (i.W && i.W.ee === 1) {
+                        i.ee = 1;
+                        i.W.ee = 0;
+                        i.te();
+                    } else {
+                        i.ee = 1;
+                        e = t;
+                    }
+                }
+            }
+        }
+    }
+    fe(e) {
+        if (this.i === 1) {
+            this.clear();
+            return this.h;
+        }
+        let t = e;
+        while (t.U || t.W) {
+            if (t.W) {
+                t = t.W;
+                while (t.U) t = t.U;
+            } else {
+                t = t.U;
+            }
+            [e.u, t.u] = [ t.u, e.u ];
+            [e.l, t.l] = [ t.l, e.l ];
+            e = t;
+        }
+        if (this.h.U === t) {
+            this.h.U = t.tt;
+        } else if (this.h.W === t) {
+            this.h.W = t.tt;
+        }
+        this.ue(t);
+        const i = t.tt;
+        if (t === i.U) {
+            i.U = undefined;
+        } else i.W = undefined;
+        this.i -= 1;
+        this.Y.ee = 0;
+        return i;
+    }
+    oe(e, t) {
+        if (e === undefined) return false;
+        const i = this.oe(e.U, t);
+        if (i) return true;
+        if (t(e)) return true;
+        return this.oe(e.W, t);
+    }
+    he(e) {
+        while (true) {
+            const t = e.tt;
+            if (t.ee === 0) return;
+            const i = t.tt;
+            if (t === i.U) {
+                const s = i.W;
+                if (s && s.ee === 1) {
+                    s.ee = t.ee = 0;
+                    if (i === this.Y) return;
+                    i.ee = 1;
+                    e = i;
+                    continue;
+                } else if (e === t.W) {
+                    e.ee = 0;
+                    if (e.U) e.U.tt = t;
+                    if (e.W) e.W.tt = i;
+                    t.W = e.U;
+                    i.U = e.W;
+                    e.U = t;
+                    e.W = i;
+                    if (i === this.Y) {
+                        this.Y = e;
+                        this.h.tt = e;
+                    } else {
+                        const t = i.tt;
+                        if (t.U === i) {
+                            t.U = e;
+                        } else t.W = e;
+                    }
+                    e.tt = i.tt;
+                    t.tt = e;
+                    i.tt = e;
+                    i.ee = 1;
+                    return {
+                        parentNode: t,
+                        grandParent: i,
+                        curNode: e
+                    };
+                } else {
+                    t.ee = 0;
+                    if (i === this.Y) {
+                        this.Y = i.se();
+                    } else i.se();
+                    i.ee = 1;
+                }
+            } else {
+                const s = i.U;
+                if (s && s.ee === 1) {
+                    s.ee = t.ee = 0;
+                    if (i === this.Y) return;
+                    i.ee = 1;
+                    e = i;
+                    continue;
+                } else if (e === t.U) {
+                    e.ee = 0;
+                    if (e.U) e.U.tt = i;
+                    if (e.W) e.W.tt = t;
+                    i.W = e.U;
+                    t.U = e.W;
+                    e.U = i;
+                    e.W = t;
+                    if (i === this.Y) {
+                        this.Y = e;
+                        this.h.tt = e;
+                    } else {
+                        const t = i.tt;
+                        if (t.U === i) {
+                            t.U = e;
+                        } else t.W = e;
+                    }
+                    e.tt = i.tt;
+                    t.tt = e;
+                    i.tt = e;
+                    i.ee = 1;
+                    return {
+                        parentNode: t,
+                        grandParent: i,
+                        curNode: e
+                    };
+                } else {
+                    t.ee = 0;
+                    if (i === this.Y) {
+                        this.Y = i.te();
+                    } else i.te();
+                    i.ee = 1;
+                }
+            }
+            return;
+        }
+    }
+    ne(e, t, i) {
+        if (this.Y === undefined) {
+            this.i += 1;
+            this.Y = new this.re(e, t);
+            this.Y.ee = 0;
+            this.Y.tt = this.h;
+            this.h.tt = this.Y;
+            this.h.U = this.Y;
+            this.h.W = this.Y;
+            return;
+        }
+        let s;
+        const r = this.h.U;
+        const n = this.v(r.u, e);
+        if (n === 0) {
+            r.l = t;
+            return;
+        } else if (n > 0) {
+            r.U = new this.re(e, t);
+            r.U.tt = r;
+            s = r.U;
+            this.h.U = s;
+        } else {
+            const r = this.h.W;
+            const n = this.v(r.u, e);
+            if (n === 0) {
+                r.l = t;
+                return;
+            } else if (n < 0) {
+                r.W = new this.re(e, t);
+                r.W.tt = r;
+                s = r.W;
+                this.h.W = s;
+            } else {
+                if (i !== undefined) {
+                    const r = i.o;
+                    if (r !== this.h) {
+                        const i = this.v(r.u, e);
+                        if (i === 0) {
+                            r.l = t;
+                            return;
+                        } else if (i > 0) {
+                            const i = r.L();
+                            const n = this.v(i.u, e);
+                            if (n === 0) {
+                                i.l = t;
+                                return;
+                            } else if (n < 0) {
+                                s = new this.re(e, t);
+                                if (i.W === undefined) {
+                                    i.W = s;
+                                    s.tt = i;
+                                } else {
+                                    r.U = s;
+                                    s.tt = r;
+                                }
+                            }
+                        }
+                    }
+                }
+                if (s === undefined) {
+                    s = this.Y;
+                    while (true) {
+                        const i = this.v(s.u, e);
+                        if (i > 0) {
+                            if (s.U === undefined) {
+                                s.U = new this.re(e, t);
+                                s.U.tt = s;
+                                s = s.U;
+                                break;
+                            }
+                            s = s.U;
+                        } else if (i < 0) {
+                            if (s.W === undefined) {
+                                s.W = new this.re(e, t);
+                                s.W.tt = s;
+                                s = s.W;
+                                break;
+                            }
+                            s = s.W;
+                        } else {
+                            s.l = t;
+                            return;
+                        }
+                    }
+                }
+            }
+        }
+        this.i += 1;
+        return s;
+    }
+    I(e, t) {
+        while (e) {
+            const i = this.v(e.u, t);
+            if (i < 0) {
+                e = e.W;
+            } else if (i > 0) {
+                e = e.U;
+            } else return e;
+        }
+        return e || this.h;
+    }
+    clear() {
+        this.i = 0;
+        this.Y = undefined;
+        this.h.tt = undefined;
+        this.h.U = this.h.W = undefined;
+    }
+    updateKeyByIterator(e, t) {
+        const i = e.o;
+        if (i === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+        }
+        if (this.i === 1) {
+            i.u = t;
+            return true;
+        }
+        if (i === this.h.U) {
+            if (this.v(i.B().u, t) > 0) {
+                i.u = t;
+                return true;
+            }
+            return false;
+        }
+        if (i === this.h.W) {
+            if (this.v(i.L().u, t) < 0) {
+                i.u = t;
+                return true;
+            }
+            return false;
+        }
+        const s = i.L().u;
+        if (this.v(s, t) >= 0) return false;
+        const r = i.B().u;
+        if (this.v(r, t) <= 0) return false;
+        i.u = t;
+        return true;
+    }
+    eraseElementByPos(e) {
+        if (e < 0 || e > this.i - 1) {
+            throw new RangeError;
+        }
+        let t = 0;
+        const i = this;
+        this.oe(this.Y, (function(s) {
+            if (e === t) {
+                i.V(s);
+                return true;
+            }
+            t += 1;
+            return false;
+        }));
+        return this.i;
+    }
+    eraseElementByKey(e) {
+        if (this.i === 0) return false;
+        const t = this.I(this.Y, e);
+        if (t === this.h) return false;
+        this.V(t);
+        return true;
+    }
+    eraseElementByIterator(e) {
+        const t = e.o;
+        if (t === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+        }
+        const i = t.W === undefined;
+        const s = e.iteratorType === 0;
+        if (s) {
+            if (i) e.next();
+        } else {
+            if (!i || t.U === undefined) e.next();
+        }
+        this.V(t);
+        return e;
+    }
+    forEach(e) {
+        let t = 0;
+        for (const i of this) e(i, t++, this);
+    }
+    getElementByPos(e) {
+        if (e < 0 || e > this.i - 1) {
+            throw new RangeError;
+        }
+        let t;
+        let i = 0;
+        for (const s of this) {
+            if (i === e) {
+                t = s;
+                break;
+            }
+            i += 1;
+        }
+        return t;
+    }
+    getHeight() {
+        if (this.i === 0) return 0;
+        const traversal = function(e) {
+            if (!e) return 0;
+            return Math.max(traversal(e.U), traversal(e.W)) + 1;
+        };
+        return traversal(this.Y);
+    }
+}
+
+var _default = TreeContainer;
+
+exports.default = _default;
+//# sourceMappingURL=index.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/index.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/index.js.map
new file mode 100644
index 0000000..f3219db
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/index.js.map
@@ -0,0 +1 @@
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{ TreeNode, TreeNodeEnableIndex } from './TreeNode';\nimport { Container } from \"../../ContainerBase\";\nimport $checkWithinAccessParams from \"../../../utils/checkParams.macro\";\nimport { throwIteratorAccessError } from \"../../../utils/throwError\";\nclass TreeContainer extends Container {\n    /**\n     * @internal\n     */\n    constructor(cmp = function (x, y) {\n        if (x < y)\n            return -1;\n        if (x > y)\n            return 1;\n        return 0;\n    }, enableIndex = false) {\n        super();\n        /**\n         * @internal\n         */\n        this._root = undefined;\n        this._cmp = cmp;\n        if (enableIndex) {\n            this._TreeNodeClass = TreeNodeEnableIndex;\n            this._set = function (key, value, hint) {\n                const curNode = this._preSet(key, value, hint);\n                if (curNode) {\n                    let p = curNode._parent;\n                    while (p !== this._header) {\n                        p._subTreeSize += 1;\n                        p = p._parent;\n                    }\n                    const nodeList = this._insertNodeSelfBalance(curNode);\n                    if (nodeList) {\n                        const { parentNode, grandParent, curNode } = nodeList;\n                        parentNode._recount();\n                        grandParent._recount();\n                        curNode._recount();\n                    }\n                }\n                return this._length;\n            };\n            this._eraseNode = function (curNode) {\n                let p = this._preEraseNode(curNode);\n                while (p !== this._header) {\n                    p._subTreeSize -= 1;\n                    p = p._parent;\n                }\n            };\n        }\n        else {\n            this._TreeNodeClass = TreeNode;\n            this._set = function (key, value, hint) {\n                const curNode = this._preSet(key, value, hint);\n                if (curNode)\n                    this._insertNodeSelfBalance(curNode);\n                return this._length;\n            };\n            this._eraseNode = this._preEraseNode;\n        }\n        this._header = new this._TreeNodeClass();\n    }\n    /**\n     * @internal\n     */\n    _lowerBound(curNode, key) {\n        let resNode = this._header;\n        while (curNode) {\n            const cmpResult = this._cmp(curNode._key, key);\n            if (cmpResult < 0) {\n                curNode = curNode._right;\n            }\n            else if (cmpResult > 0) {\n                resNode = curNode;\n                curNode = curNode._left;\n            }\n            else\n                return curNode;\n        }\n        return resNode;\n    }\n    /**\n     * @internal\n     */\n    _upperBound(curNode, key) {\n        let resNode = this._header;\n        while (curNode) {\n            const cmpResult = this._cmp(curNode._key, key);\n            if (cmpResult <= 0) {\n                curNode = curNode._right;\n            }\n            else {\n                resNode = curNode;\n                curNode = curNode._left;\n            }\n        }\n        return resNode;\n    }\n    /**\n     * @internal\n     */\n    _reverseLowerBound(curNode, key) {\n        let resNode = this._header;\n        while (curNode) {\n            const cmpResult = this._cmp(curNode._key, key);\n            if (cmpResult < 0) {\n                resNode = curNode;\n                curNode = curNode._right;\n            }\n            else if (cmpResult > 0) {\n                curNode = curNode._left;\n            }\n            else\n                return curNode;\n        }\n        return resNode;\n    }\n    /**\n     * @internal\n     */\n    _reverseUpperBound(curNode, key) {\n        let resNode = this._header;\n        while (curNode) {\n            const cmpResult = this._cmp(curNode._key, key);\n            if (cmpResult < 0) {\n                resNode = curNode;\n                curNode = curNode._right;\n            }\n            else {\n                curNode = curNode._left;\n            }\n        }\n        return resNode;\n    }\n    /**\n     * @internal\n     */\n    _eraseNodeSelfBalance(curNode) {\n        while (true) {\n            const parentNode = curNode._parent;\n            if (parentNode === this._header)\n                return;\n            if (curNode._color === 1 /* TreeNodeColor.RED */) {\n                curNode._color = 0 /* TreeNodeColor.BLACK */;\n                return;\n            }\n            if (curNode === parentNode._left) {\n                const brother = parentNode._right;\n                if (brother._color === 1 /* TreeNodeColor.RED */) {\n                    brother._color = 0 /* TreeNodeColor.BLACK */;\n                    parentNode._color = 1 /* TreeNodeColor.RED */;\n                    if (parentNode === this._root) {\n                        this._root = parentNode._rotateLeft();\n                    }\n                    else\n                        parentNode._rotateLeft();\n                }\n                else {\n                    if (brother._right && brother._right._color === 1 /* TreeNodeColor.RED */) {\n                        brother._color = parentNode._color;\n                        parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                        brother._right._color = 0 /* TreeNodeColor.BLACK */;\n                        if (parentNode === this._root) {\n                            this._root = parentNode._rotateLeft();\n                        }\n                        else\n                            parentNode._rotateLeft();\n                        return;\n                    }\n                    else if (brother._left && brother._left._color === 1 /* TreeNodeColor.RED */) {\n                        brother._color = 1 /* TreeNodeColor.RED */;\n                        brother._left._color = 0 /* TreeNodeColor.BLACK */;\n                        brother._rotateRight();\n                    }\n                    else {\n                        brother._color = 1 /* TreeNodeColor.RED */;\n                        curNode = parentNode;\n                    }\n                }\n            }\n            else {\n                const brother = parentNode._left;\n                if (brother._color === 1 /* TreeNodeColor.RED */) {\n                    brother._color = 0 /* TreeNodeColor.BLACK */;\n                    parentNode._color = 1 /* TreeNodeColor.RED */;\n                    if (parentNode === this._root) {\n                        this._root = parentNode._rotateRight();\n                    }\n                    else\n                        parentNode._rotateRight();\n                }\n                else {\n                    if (brother._left && brother._left._color === 1 /* TreeNodeColor.RED */) {\n                        brother._color = parentNode._color;\n                        parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                        brother._left._color = 0 /* TreeNodeColor.BLACK */;\n                        if (parentNode === this._root) {\n                            this._root = parentNode._rotateRight();\n                        }\n                        else\n                            parentNode._rotateRight();\n                        return;\n                    }\n                    else if (brother._right && brother._right._color === 1 /* TreeNodeColor.RED */) {\n                        brother._color = 1 /* TreeNodeColor.RED */;\n                        brother._right._color = 0 /* TreeNodeColor.BLACK */;\n                        brother._rotateLeft();\n                    }\n                    else {\n                        brother._color = 1 /* TreeNodeColor.RED */;\n                        curNode = parentNode;\n                    }\n                }\n            }\n        }\n    }\n    /**\n     * @internal\n     */\n    _preEraseNode(curNode) {\n        if (this._length === 1) {\n            this.clear();\n            return this._header;\n        }\n        let swapNode = curNode;\n        while (swapNode._left || swapNode._right) {\n            if (swapNode._right) {\n                swapNode = swapNode._right;\n                while (swapNode._left)\n                    swapNode = swapNode._left;\n            }\n            else {\n                swapNode = swapNode._left;\n            }\n            [curNode._key, swapNode._key] = [swapNode._key, curNode._key];\n            [curNode._value, swapNode._value] = [swapNode._value, curNode._value];\n            curNode = swapNode;\n        }\n        if (this._header._left === swapNode) {\n            this._header._left = swapNode._parent;\n        }\n        else if (this._header._right === swapNode) {\n            this._header._right = swapNode._parent;\n        }\n        this._eraseNodeSelfBalance(swapNode);\n        const _parent = swapNode._parent;\n        if (swapNode === _parent._left) {\n            _parent._left = undefined;\n        }\n        else\n            _parent._right = undefined;\n        this._length -= 1;\n        this._root._color = 0 /* TreeNodeColor.BLACK */;\n        return _parent;\n    }\n    /**\n     * @internal\n     */\n    _inOrderTraversal(curNode, callback) {\n        if (curNode === undefined)\n            return false;\n        const ifReturn = this._inOrderTraversal(curNode._left, callback);\n        if (ifReturn)\n            return true;\n        if (callback(curNode))\n            return true;\n        return this._inOrderTraversal(curNode._right, callback);\n    }\n    /**\n     * @internal\n     */\n    _insertNodeSelfBalance(curNode) {\n        while (true) {\n            const parentNode = curNode._parent;\n            if (parentNode._color === 0 /* TreeNodeColor.BLACK */)\n                return;\n            const grandParent = parentNode._parent;\n            if (parentNode === grandParent._left) {\n                const uncle = grandParent._right;\n                if (uncle && uncle._color === 1 /* TreeNodeColor.RED */) {\n                    uncle._color = parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (grandParent === this._root)\n                        return;\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                    curNode = grandParent;\n                    continue;\n                }\n                else if (curNode === parentNode._right) {\n                    curNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (curNode._left)\n                        curNode._left._parent = parentNode;\n                    if (curNode._right)\n                        curNode._right._parent = grandParent;\n                    parentNode._right = curNode._left;\n                    grandParent._left = curNode._right;\n                    curNode._left = parentNode;\n                    curNode._right = grandParent;\n                    if (grandParent === this._root) {\n                        this._root = curNode;\n                        this._header._parent = curNode;\n                    }\n                    else {\n                        const GP = grandParent._parent;\n                        if (GP._left === grandParent) {\n                            GP._left = curNode;\n                        }\n                        else\n                            GP._right = curNode;\n                    }\n                    curNode._parent = grandParent._parent;\n                    parentNode._parent = curNode;\n                    grandParent._parent = curNode;\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                    return { parentNode, grandParent, curNode };\n                }\n                else {\n                    parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (grandParent === this._root) {\n                        this._root = grandParent._rotateRight();\n                    }\n                    else\n                        grandParent._rotateRight();\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                }\n            }\n            else {\n                const uncle = grandParent._left;\n                if (uncle && uncle._color === 1 /* TreeNodeColor.RED */) {\n                    uncle._color = parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (grandParent === this._root)\n                        return;\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                    curNode = grandParent;\n                    continue;\n                }\n                else if (curNode === parentNode._left) {\n                    curNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (curNode._left)\n                        curNode._left._parent = grandParent;\n                    if (curNode._right)\n                        curNode._right._parent = parentNode;\n                    grandParent._right = curNode._left;\n                    parentNode._left = curNode._right;\n                    curNode._left = grandParent;\n                    curNode._right = parentNode;\n                    if (grandParent === this._root) {\n                        this._root = curNode;\n                        this._header._parent = curNode;\n                    }\n                    else {\n                        const GP = grandParent._parent;\n                        if (GP._left === grandParent) {\n                            GP._left = curNode;\n                        }\n                        else\n                            GP._right = curNode;\n                    }\n                    curNode._parent = grandParent._parent;\n                    parentNode._parent = curNode;\n                    grandParent._parent = curNode;\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                    return { parentNode, grandParent, curNode };\n                }\n                else {\n                    parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (grandParent === this._root) {\n                        this._root = grandParent._rotateLeft();\n                    }\n                    else\n                        grandParent._rotateLeft();\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                }\n            }\n            return;\n        }\n    }\n    /**\n     * @internal\n     */\n    _preSet(key, value, hint) {\n        if (this._root === undefined) {\n            this._length += 1;\n            this._root = new this._TreeNodeClass(key, value);\n            this._root._color = 0 /* TreeNodeColor.BLACK */;\n            this._root._parent = this._header;\n            this._header._parent = this._root;\n            this._header._left = this._root;\n            this._header._right = this._root;\n            return;\n        }\n        let curNode;\n        const minNode = this._header._left;\n        const compareToMin = this._cmp(minNode._key, key);\n        if (compareToMin === 0) {\n            minNode._value = value;\n            return;\n        }\n        else if (compareToMin > 0) {\n            minNode._left = new this._TreeNodeClass(key, value);\n            minNode._left._parent = minNode;\n            curNode = minNode._left;\n            this._header._left = curNode;\n        }\n        else {\n            const maxNode = this._header._right;\n            const compareToMax = this._cmp(maxNode._key, key);\n            if (compareToMax === 0) {\n                maxNode._value = value;\n                return;\n            }\n            else if (compareToMax < 0) {\n                maxNode._right = new this._TreeNodeClass(key, value);\n                maxNode._right._parent = maxNode;\n                curNode = maxNode._right;\n                this._header._right = curNode;\n            }\n            else {\n                if (hint !== undefined) {\n                    const iterNode = hint._node;\n                    if (iterNode !== this._header) {\n                        const iterCmpRes = this._cmp(iterNode._key, key);\n                        if (iterCmpRes === 0) {\n                            iterNode._value = value;\n                            return;\n                        }\n                        else /* istanbul ignore else */ if (iterCmpRes > 0) {\n                            const preNode = iterNode._pre();\n                            const preCmpRes = this._cmp(preNode._key, key);\n                            if (preCmpRes === 0) {\n                                preNode._value = value;\n                                return;\n                            }\n                            else if (preCmpRes < 0) {\n                                curNode = new this._TreeNodeClass(key, value);\n                                if (preNode._right === undefined) {\n                                    preNode._right = curNode;\n                                    curNode._parent = preNode;\n                                }\n                                else {\n                                    iterNode._left = curNode;\n                                    curNode._parent = iterNode;\n                                }\n                            }\n                        }\n                    }\n                }\n                if (curNode === undefined) {\n                    curNode = this._root;\n                    while (true) {\n                        const cmpResult = this._cmp(curNode._key, key);\n                        if (cmpResult > 0) {\n                            if (curNode._left === undefined) {\n                                curNode._left = new this._TreeNodeClass(key, value);\n                                curNode._left._parent = curNode;\n                                curNode = curNode._left;\n                                break;\n                            }\n                            curNode = curNode._left;\n                        }\n                        else if (cmpResult < 0) {\n                            if (curNode._right === undefined) {\n                                curNode._right = new this._TreeNodeClass(key, value);\n                                curNode._right._parent = curNode;\n                                curNode = curNode._right;\n                                break;\n                            }\n                            curNode = curNode._right;\n                        }\n                        else {\n                            curNode._value = value;\n                            return;\n                        }\n                    }\n                }\n            }\n        }\n        this._length += 1;\n        return curNode;\n    }\n    /**\n     * @internal\n     */\n    _findElementNode(curNode, key) {\n        while (curNode) {\n            const cmpResult = this._cmp(curNode._key, key);\n            if (cmpResult < 0) {\n                curNode = curNode._right;\n            }\n            else if (cmpResult > 0) {\n                curNode = curNode._left;\n            }\n            else\n                return curNode;\n        }\n        return curNode || this._header;\n    }\n    clear() {\n        this._length = 0;\n        this._root = undefined;\n        this._header._parent = undefined;\n        this._header._left = this._header._right = undefined;\n    }\n    /**\n     * @description Update node's key by iterator.\n     * @param iter - The iterator you want to change.\n     * @param key - The key you want to update.\n     * @returns Whether the modification is successful.\n     * @example\n     * const st = new orderedSet([1, 2, 5]);\n     * const iter = st.find(2);\n     * st.updateKeyByIterator(iter, 3); // then st will become [1, 3, 5]\n     */\n    updateKeyByIterator(iter, key) {\n        const node = iter._node;\n        if (node === this._header) {\n            throwIteratorAccessError();\n        }\n        if (this._length === 1) {\n            node._key = key;\n            return true;\n        }\n        if (node === this._header._left) {\n            if (this._cmp(node._next()._key, key) > 0) {\n                node._key = key;\n                return true;\n            }\n            return false;\n        }\n        if (node === this._header._right) {\n            if (this._cmp(node._pre()._key, key) < 0) {\n                node._key = key;\n                return true;\n            }\n            return false;\n        }\n        const preKey = node._pre()._key;\n        if (this._cmp(preKey, key) >= 0)\n            return false;\n        const nextKey = node._next()._key;\n        if (this._cmp(nextKey, key) <= 0)\n            return false;\n        node._key = key;\n        return true;\n    }\n    eraseElementByPos(pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        let index = 0;\n        const self = this;\n        this._inOrderTraversal(this._root, function (curNode) {\n            if (pos === index) {\n                self._eraseNode(curNode);\n                return true;\n            }\n            index += 1;\n            return false;\n        });\n        return this._length;\n    }\n    /**\n     * @description Remove the element of the specified key.\n     * @param key - The key you want to remove.\n     * @returns Whether erase successfully.\n     */\n    eraseElementByKey(key) {\n        if (this._length === 0)\n            return false;\n        const curNode = this._findElementNode(this._root, key);\n        if (curNode === this._header)\n            return false;\n        this._eraseNode(curNode);\n        return true;\n    }\n    eraseElementByIterator(iter) {\n        const node = iter._node;\n        if (node === this._header) {\n            throwIteratorAccessError();\n        }\n        const hasNoRight = node._right === undefined;\n        const isNormal = iter.iteratorType === 0 /* IteratorType.NORMAL */;\n        // For the normal iterator, the `next` node will be swapped to `this` node when has right.\n        if (isNormal) {\n            // So we should move it to next when it's right is null.\n            if (hasNoRight)\n                iter.next();\n        }\n        else {\n            // For the reverse iterator, only when it doesn't have right and has left the `next` node will be swapped.\n            // So when it has right, or it is a leaf node we should move it to `next`.\n            if (!hasNoRight || node._left === undefined)\n                iter.next();\n        }\n        this._eraseNode(node);\n        return iter;\n    }\n    forEach(callback) {\n        let index = 0;\n        for (const element of this)\n            callback(element, index++, this);\n    }\n    getElementByPos(pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        let res;\n        let index = 0;\n        for (const element of this) {\n            if (index === pos) {\n                res = element;\n                break;\n            }\n            index += 1;\n        }\n        return res;\n    }\n    /**\n     * @description Get the height of the tree.\n     * @returns Number about the height of the RB-tree.\n     */\n    getHeight() {\n        if (this._length === 0)\n            return 0;\n        const traversal = function (curNode) {\n            if (!curNode)\n                return 0;\n            return Math.max(traversal(curNode._left), traversal(curNode._right)) + 1;\n        };\n        return traversal(this._root);\n    }\n}\nexport default TreeContainer;\n","import type TreeIterator from './TreeIterator';\nimport { TreeNode, TreeNodeColor, TreeNodeEnableIndex } from './TreeNode';\nimport { Container, IteratorType } from '@/container/ContainerBase';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nabstract class TreeContainer<K, V> extends Container<K | [K, V]> {\n  /**\n   * @internal\n   */\n  protected _root: TreeNode<K, V> | undefined = undefined;\n  /**\n   * @internal\n   */\n  protected _header: TreeNode<K, V>;\n  /**\n   * @internal\n   */\n  protected readonly _cmp: (x: K, y: K) => number;\n  /**\n   * @internal\n   */\n  protected readonly _TreeNodeClass: typeof TreeNode | typeof TreeNodeEnableIndex;\n  /**\n   * @internal\n   */\n  protected readonly _eraseNode: (curNode: TreeNode<K, V>) => void;\n  /**\n   * @internal\n   */\n  protected _set: (key: K, value: V, hint?: TreeIterator<K, V>) => number;\n  /**\n   * @internal\n   */\n  protected constructor(\n    cmp: (x: K, y: K) => number =\n    function (x: K, y: K) {\n      if (x < y) return -1;\n      if (x > y) return 1;\n      return 0;\n    },\n    enableIndex = false\n  ) {\n    super();\n    this._cmp = cmp;\n    if (enableIndex) {\n      this._TreeNodeClass = TreeNodeEnableIndex;\n      this._set = function (key, value, hint) {\n        const curNode = this._preSet(key, value, hint);\n        if (curNode) {\n          let p = curNode._parent as TreeNodeEnableIndex<K, V>;\n          while (p !== this._header) {\n            p._subTreeSize += 1;\n            p = p._parent as TreeNodeEnableIndex<K, V>;\n          }\n          const nodeList = this._insertNodeSelfBalance(curNode);\n          if (nodeList) {\n            const {\n              parentNode,\n              grandParent,\n              curNode\n            } = nodeList as unknown as Record<string, TreeNodeEnableIndex<K, V>>;\n            parentNode._recount();\n            grandParent._recount();\n            curNode._recount();\n          }\n        }\n        return this._length;\n      };\n      this._eraseNode = function (curNode) {\n        let p = this._preEraseNode(curNode) as TreeNodeEnableIndex<K, V>;\n        while (p !== this._header) {\n          p._subTreeSize -= 1;\n          p = p._parent as TreeNodeEnableIndex<K, V>;\n        }\n      };\n    } else {\n      this._TreeNodeClass = TreeNode;\n      this._set = function (key, value, hint) {\n        const curNode = this._preSet(key, value, hint);\n        if (curNode) this._insertNodeSelfBalance(curNode);\n        return this._length;\n      };\n      this._eraseNode = this._preEraseNode;\n    }\n    this._header = new this._TreeNodeClass();\n  }\n  /**\n   * @internal\n   */\n  protected _lowerBound(curNode: TreeNode<K, V> | undefined, key: K) {\n    let resNode = this._header;\n    while (curNode) {\n      const cmpResult = this._cmp(curNode._key!, key);\n      if (cmpResult < 0) {\n        curNode = curNode._right;\n      } else if (cmpResult > 0) {\n        resNode = curNode;\n        curNode = curNode._left;\n      } else return curNode;\n    }\n    return resNode;\n  }\n  /**\n   * @internal\n   */\n  protected _upperBound(curNode: TreeNode<K, V> | undefined, key: K) {\n    let resNode = this._header;\n    while (curNode) {\n      const cmpResult = this._cmp(curNode._key!, key);\n      if (cmpResult <= 0) {\n        curNode = curNode._right;\n      } else {\n        resNode = curNode;\n        curNode = curNode._left;\n      }\n    }\n    return resNode;\n  }\n  /**\n   * @internal\n   */\n  protected _reverseLowerBound(curNode: TreeNode<K, V> | undefined, key: K) {\n    let resNode = this._header;\n    while (curNode) {\n      const cmpResult = this._cmp(curNode._key!, key);\n      if (cmpResult < 0) {\n        resNode = curNode;\n        curNode = curNode._right;\n      } else if (cmpResult > 0) {\n        curNode = curNode._left;\n      } else return curNode;\n    }\n    return resNode;\n  }\n  /**\n   * @internal\n   */\n  protected _reverseUpperBound(curNode: TreeNode<K, V> | undefined, key: K) {\n    let resNode = this._header;\n    while (curNode) {\n      const cmpResult = this._cmp(curNode._key!, key);\n      if (cmpResult < 0) {\n        resNode = curNode;\n        curNode = curNode._right;\n      } else {\n        curNode = curNode._left;\n      }\n    }\n    return resNode;\n  }\n  /**\n   * @internal\n   */\n  protected _eraseNodeSelfBalance(curNode: TreeNode<K, V>) {\n    while (true) {\n      const parentNode = curNode._parent!;\n      if (parentNode === this._header) return;\n      if (curNode._color === TreeNodeColor.RED) {\n        curNode._color = TreeNodeColor.BLACK;\n        return;\n      }\n      if (curNode === parentNode._left) {\n        const brother = parentNode._right!;\n        if (brother._color === TreeNodeColor.RED) {\n          brother._color = TreeNodeColor.BLACK;\n          parentNode._color = TreeNodeColor.RED;\n          if (parentNode === this._root) {\n            this._root = parentNode._rotateLeft();\n          } else parentNode._rotateLeft();\n        } else {\n          if (brother._right && brother._right._color === TreeNodeColor.RED) {\n            brother._color = parentNode._color;\n            parentNode._color = TreeNodeColor.BLACK;\n            brother._right._color = TreeNodeColor.BLACK;\n            if (parentNode === this._root) {\n              this._root = parentNode._rotateLeft();\n            } else parentNode._rotateLeft();\n            return;\n          } else if (brother._left && brother._left._color === TreeNodeColor.RED) {\n            brother._color = TreeNodeColor.RED;\n            brother._left._color = TreeNodeColor.BLACK;\n            brother._rotateRight();\n          } else {\n            brother._color = TreeNodeColor.RED;\n            curNode = parentNode;\n          }\n        }\n      } else {\n        const brother = parentNode._left!;\n        if (brother._color === TreeNodeColor.RED) {\n          brother._color = TreeNodeColor.BLACK;\n          parentNode._color = TreeNodeColor.RED;\n          if (parentNode === this._root) {\n            this._root = parentNode._rotateRight();\n          } else parentNode._rotateRight();\n        } else {\n          if (brother._left && brother._left._color === TreeNodeColor.RED) {\n            brother._color = parentNode._color;\n            parentNode._color = TreeNodeColor.BLACK;\n            brother._left._color = TreeNodeColor.BLACK;\n            if (parentNode === this._root) {\n              this._root = parentNode._rotateRight();\n            } else parentNode._rotateRight();\n            return;\n          } else if (brother._right && brother._right._color === TreeNodeColor.RED) {\n            brother._color = TreeNodeColor.RED;\n            brother._right._color = TreeNodeColor.BLACK;\n            brother._rotateLeft();\n          } else {\n            brother._color = TreeNodeColor.RED;\n            curNode = parentNode;\n          }\n        }\n      }\n    }\n  }\n  /**\n   * @internal\n   */\n  protected _preEraseNode(curNode: TreeNode<K, V>) {\n    if (this._length === 1) {\n      this.clear();\n      return this._header;\n    }\n    let swapNode = curNode;\n    while (swapNode._left || swapNode._right) {\n      if (swapNode._right) {\n        swapNode = swapNode._right;\n        while (swapNode._left) swapNode = swapNode._left;\n      } else {\n        swapNode = swapNode._left!;\n      }\n      [curNode._key, swapNode._key] = [swapNode._key, curNode._key];\n      [curNode._value, swapNode._value] = [swapNode._value, curNode._value];\n      curNode = swapNode;\n    }\n    if (this._header._left === swapNode) {\n      this._header._left = swapNode._parent;\n    } else if (this._header._right === swapNode) {\n      this._header._right = swapNode._parent;\n    }\n    this._eraseNodeSelfBalance(swapNode);\n    const _parent = swapNode._parent!;\n    if (swapNode === _parent._left) {\n      _parent._left = undefined;\n    } else _parent._right = undefined;\n    this._length -= 1;\n    this._root!._color = TreeNodeColor.BLACK;\n    return _parent;\n  }\n  /**\n   * @internal\n   */\n  protected _inOrderTraversal(\n    curNode: TreeNode<K, V> | undefined,\n    callback: (curNode: TreeNode<K, V>) => boolean\n  ): boolean {\n    if (curNode === undefined) return false;\n    const ifReturn = this._inOrderTraversal(curNode._left, callback);\n    if (ifReturn) return true;\n    if (callback(curNode)) return true;\n    return this._inOrderTraversal(curNode._right, callback);\n  }\n  /**\n   * @internal\n   */\n  protected _insertNodeSelfBalance(curNode: TreeNode<K, V>) {\n    while (true) {\n      const parentNode = curNode._parent!;\n      if (parentNode._color === TreeNodeColor.BLACK) return;\n      const grandParent = parentNode._parent!;\n      if (parentNode === grandParent._left) {\n        const uncle = grandParent._right;\n        if (uncle && uncle._color === TreeNodeColor.RED) {\n          uncle._color = parentNode._color = TreeNodeColor.BLACK;\n          if (grandParent === this._root) return;\n          grandParent._color = TreeNodeColor.RED;\n          curNode = grandParent;\n          continue;\n        } else if (curNode === parentNode._right) {\n          curNode._color = TreeNodeColor.BLACK;\n          if (curNode._left) curNode._left._parent = parentNode;\n          if (curNode._right) curNode._right._parent = grandParent;\n          parentNode._right = curNode._left;\n          grandParent._left = curNode._right;\n          curNode._left = parentNode;\n          curNode._right = grandParent;\n          if (grandParent === this._root) {\n            this._root = curNode;\n            this._header._parent = curNode;\n          } else {\n            const GP = grandParent._parent!;\n            if (GP._left === grandParent) {\n              GP._left = curNode;\n            } else GP._right = curNode;\n          }\n          curNode._parent = grandParent._parent;\n          parentNode._parent = curNode;\n          grandParent._parent = curNode;\n          grandParent._color = TreeNodeColor.RED;\n          return { parentNode, grandParent, curNode };\n        } else {\n          parentNode._color = TreeNodeColor.BLACK;\n          if (grandParent === this._root) {\n            this._root = grandParent._rotateRight();\n          } else grandParent._rotateRight();\n          grandParent._color = TreeNodeColor.RED;\n        }\n      } else {\n        const uncle = grandParent._left;\n        if (uncle && uncle._color === TreeNodeColor.RED) {\n          uncle._color = parentNode._color = TreeNodeColor.BLACK;\n          if (grandParent === this._root) return;\n          grandParent._color = TreeNodeColor.RED;\n          curNode = grandParent;\n          continue;\n        } else if (curNode === parentNode._left) {\n          curNode._color = TreeNodeColor.BLACK;\n          if (curNode._left) curNode._left._parent = grandParent;\n          if (curNode._right) curNode._right._parent = parentNode;\n          grandParent._right = curNode._left;\n          parentNode._left = curNode._right;\n          curNode._left = grandParent;\n          curNode._right = parentNode;\n          if (grandParent === this._root) {\n            this._root = curNode;\n            this._header._parent = curNode;\n          } else {\n            const GP = grandParent._parent!;\n            if (GP._left === grandParent) {\n              GP._left = curNode;\n            } else GP._right = curNode;\n          }\n          curNode._parent = grandParent._parent;\n          parentNode._parent = curNode;\n          grandParent._parent = curNode;\n          grandParent._color = TreeNodeColor.RED;\n          return { parentNode, grandParent, curNode };\n        } else {\n          parentNode._color = TreeNodeColor.BLACK;\n          if (grandParent === this._root) {\n            this._root = grandParent._rotateLeft();\n          } else grandParent._rotateLeft();\n          grandParent._color = TreeNodeColor.RED;\n        }\n      }\n      return;\n    }\n  }\n  /**\n   * @internal\n   */\n  protected _preSet(key: K, value?: V, hint?: TreeIterator<K, V>) {\n    if (this._root === undefined) {\n      this._length += 1;\n      this._root = new this._TreeNodeClass(key, value);\n      this._root._color = TreeNodeColor.BLACK;\n      this._root._parent = this._header;\n      this._header._parent = this._root;\n      this._header._left = this._root;\n      this._header._right = this._root;\n      return;\n    }\n    let curNode;\n    const minNode = this._header._left!;\n    const compareToMin = this._cmp(minNode._key!, key);\n    if (compareToMin === 0) {\n      minNode._value = value;\n      return;\n    } else if (compareToMin > 0) {\n      minNode._left = new this._TreeNodeClass(key, value);\n      minNode._left._parent = minNode;\n      curNode = minNode._left;\n      this._header._left = curNode;\n    } else {\n      const maxNode = this._header._right!;\n      const compareToMax = this._cmp(maxNode._key!, key);\n      if (compareToMax === 0) {\n        maxNode._value = value;\n        return;\n      } else if (compareToMax < 0) {\n        maxNode._right = new this._TreeNodeClass(key, value);\n        maxNode._right._parent = maxNode;\n        curNode = maxNode._right;\n        this._header._right = curNode;\n      } else {\n        if (hint !== undefined) {\n          const iterNode = hint._node;\n          if (iterNode !== this._header) {\n            const iterCmpRes = this._cmp(iterNode._key!, key);\n            if (iterCmpRes === 0) {\n              iterNode._value = value;\n              return;\n            } else /* istanbul ignore else */ if (iterCmpRes > 0) {\n              const preNode = iterNode._pre();\n              const preCmpRes = this._cmp(preNode._key!, key);\n              if (preCmpRes === 0) {\n                preNode._value = value;\n                return;\n              } else if (preCmpRes < 0) {\n                curNode = new this._TreeNodeClass(key, value);\n                if (preNode._right === undefined) {\n                  preNode._right = curNode;\n                  curNode._parent = preNode;\n                } else {\n                  iterNode._left = curNode;\n                  curNode._parent = iterNode;\n                }\n              }\n            }\n          }\n        }\n        if (curNode === undefined) {\n          curNode = this._root;\n          while (true) {\n            const cmpResult = this._cmp(curNode._key!, key);\n            if (cmpResult > 0) {\n              if (curNode._left === undefined) {\n                curNode._left = new this._TreeNodeClass(key, value);\n                curNode._left._parent = curNode;\n                curNode = curNode._left;\n                break;\n              }\n              curNode = curNode._left;\n            } else if (cmpResult < 0) {\n              if (curNode._right === undefined) {\n                curNode._right = new this._TreeNodeClass(key, value);\n                curNode._right._parent = curNode;\n                curNode = curNode._right;\n                break;\n              }\n              curNode = curNode._right;\n            } else {\n              curNode._value = value;\n              return;\n            }\n          }\n        }\n      }\n    }\n    this._length += 1;\n    return curNode;\n  }\n  /**\n   * @internal\n   */\n  protected _findElementNode(curNode: TreeNode<K, V> | undefined, key: K) {\n    while (curNode) {\n      const cmpResult = this._cmp(curNode._key!, key);\n      if (cmpResult < 0) {\n        curNode = curNode._right;\n      } else if (cmpResult > 0) {\n        curNode = curNode._left;\n      } else return curNode;\n    }\n    return curNode || this._header;\n  }\n  clear() {\n    this._length = 0;\n    this._root = undefined;\n    this._header._parent = undefined;\n    this._header._left = this._header._right = undefined;\n  }\n  /**\n   * @description Update node's key by iterator.\n   * @param iter - The iterator you want to change.\n   * @param key - The key you want to update.\n   * @returns Whether the modification is successful.\n   * @example\n   * const st = new orderedSet([1, 2, 5]);\n   * const iter = st.find(2);\n   * st.updateKeyByIterator(iter, 3); // then st will become [1, 3, 5]\n   */\n  updateKeyByIterator(iter: TreeIterator<K, V>, key: K): boolean {\n    const node = iter._node;\n    if (node === this._header) {\n      throwIteratorAccessError();\n    }\n    if (this._length === 1) {\n      node._key = key;\n      return true;\n    }\n    if (node === this._header._left) {\n      if (this._cmp(node._next()._key!, key) > 0) {\n        node._key = key;\n        return true;\n      }\n      return false;\n    }\n    if (node === this._header._right) {\n      if (this._cmp(node._pre()._key!, key) < 0) {\n        node._key = key;\n        return true;\n      }\n      return false;\n    }\n    const preKey = node._pre()._key!;\n    if (this._cmp(preKey, key) >= 0) return false;\n    const nextKey = node._next()._key!;\n    if (this._cmp(nextKey, key) <= 0) return false;\n    node._key = key;\n    return true;\n  }\n  eraseElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let index = 0;\n    const self = this;\n    this._inOrderTraversal(\n      this._root,\n      function (curNode) {\n        if (pos === index) {\n          self._eraseNode(curNode);\n          return true;\n        }\n        index += 1;\n        return false;\n      });\n    return this._length;\n  }\n  /**\n   * @description Remove the element of the specified key.\n   * @param key - The key you want to remove.\n   * @returns Whether erase successfully.\n   */\n  eraseElementByKey(key: K) {\n    if (this._length === 0) return false;\n    const curNode = this._findElementNode(this._root, key);\n    if (curNode === this._header) return false;\n    this._eraseNode(curNode);\n    return true;\n  }\n  eraseElementByIterator(iter: TreeIterator<K, V>) {\n    const node = iter._node;\n    if (node === this._header) {\n      throwIteratorAccessError();\n    }\n    const hasNoRight = node._right === undefined;\n    const isNormal = iter.iteratorType === IteratorType.NORMAL;\n    // For the normal iterator, the `next` node will be swapped to `this` node when has right.\n    if (isNormal) {\n      // So we should move it to next when it's right is null.\n      if (hasNoRight) iter.next();\n    } else {\n      // For the reverse iterator, only when it doesn't have right and has left the `next` node will be swapped.\n      // So when it has right, or it is a leaf node we should move it to `next`.\n      if (!hasNoRight || node._left === undefined) iter.next();\n    }\n    this._eraseNode(node);\n    return iter;\n  }\n  forEach(callback: (element: K | [K, V], index: number, tree: TreeContainer<K, V>) => void) {\n    let index = 0;\n    for (const element of this) callback(element, index++, this);\n  }\n  getElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let res;\n    let index = 0;\n    for (const element of this) {\n      if (index === pos) {\n        res = element;\n        break;\n      }\n      index += 1;\n    }\n    return <K | [K, V]>res;\n  }\n  /**\n   * @description Get the height of the tree.\n   * @returns Number about the height of the RB-tree.\n   */\n  getHeight() {\n    if (this._length === 0) return 0;\n    const traversal =\n      function (curNode: TreeNode<K, V> | undefined): number {\n        if (!curNode) return 0;\n        return Math.max(traversal(curNode._left), traversal(curNode._right)) + 1;\n      };\n    return traversal(this._root);\n  }\n  /**\n   * @param key - The given key you want to compare.\n   * @returns An iterator to the first element less than the given key.\n   */\n  abstract reverseUpperBound(key: K): TreeIterator<K, V>;\n  /**\n   * @description Union the other tree to self.\n   * @param other - The other tree container you want to merge.\n   * @returns The size of the tree after union.\n   */\n  abstract union(other: TreeContainer<K, V>): number;\n  /**\n   * @param key - The given key you want to compare.\n   * @returns An iterator to the first element not greater than the given key.\n   */\n  abstract reverseLowerBound(key: K): TreeIterator<K, V>;\n  /**\n   * @param key - The given key you want to compare.\n   * @returns An iterator to the first element not less than the given key.\n   */\n  abstract lowerBound(key: K): TreeIterator<K, V>;\n  /**\n   * @param key - The given key you want to compare.\n   * @returns An iterator to the first element greater than the given key.\n   */\n  abstract upperBound(key: K): TreeIterator<K, V>;\n}\n\nexport default TreeContainer;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedMap.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedMap.d.ts
new file mode 100644
index 0000000..18c921f
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedMap.d.ts
@@ -0,0 +1,62 @@
+import TreeContainer from './Base';
+import TreeIterator from './Base/TreeIterator';
+import { TreeNode } from './Base/TreeNode';
+import { initContainer, IteratorType } from "../ContainerBase";
+declare class OrderedMapIterator<K, V> extends TreeIterator<K, V> {
+    container: OrderedMap<K, V>;
+    constructor(node: TreeNode<K, V>, header: TreeNode<K, V>, container: OrderedMap<K, V>, iteratorType?: IteratorType);
+    get pointer(): [K, V];
+    copy(): OrderedMapIterator<K, V>;
+    equals(iter: OrderedMapIterator<K, V>): boolean;
+}
+export type { OrderedMapIterator };
+declare class OrderedMap<K, V> extends TreeContainer<K, V> {
+    /**
+     * @param container - The initialization container.
+     * @param cmp - The compare function.
+     * @param enableIndex - Whether to enable iterator indexing function.
+     * @example
+     * new OrderedMap();
+     * new OrderedMap([[0, 1], [2, 1]]);
+     * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y);
+     * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y, true);
+     */
+    constructor(container?: initContainer<[K, V]>, cmp?: (x: K, y: K) => number, enableIndex?: boolean);
+    begin(): OrderedMapIterator<K, V>;
+    end(): OrderedMapIterator<K, V>;
+    rBegin(): OrderedMapIterator<K, V>;
+    rEnd(): OrderedMapIterator<K, V>;
+    front(): [K, V] | undefined;
+    back(): [K, V] | undefined;
+    lowerBound(key: K): OrderedMapIterator<K, V>;
+    upperBound(key: K): OrderedMapIterator<K, V>;
+    reverseLowerBound(key: K): OrderedMapIterator<K, V>;
+    reverseUpperBound(key: K): OrderedMapIterator<K, V>;
+    /**
+     * @description Insert a key-value pair or set value by the given key.
+     * @param key - The key want to insert.
+     * @param value - The value want to set.
+     * @param hint - You can give an iterator hint to improve insertion efficiency.
+     * @return The size of container after setting.
+     * @example
+     * const mp = new OrderedMap([[2, 0], [4, 0], [5, 0]]);
+     * const iter = mp.begin();
+     * mp.setElement(1, 0);
+     * mp.setElement(3, 0, iter);  // give a hint will be faster.
+     */
+    setElement(key: K, value: V, hint?: OrderedMapIterator<K, V>): number;
+    find(key: K): OrderedMapIterator<K, V>;
+    /**
+     * @description Get the value of the element of the specified key.
+     * @param key - The specified key you want to get.
+     * @example
+     * const val = container.getElementByKey(1);
+     */
+    getElementByKey(key: K): V | undefined;
+    union(other: OrderedMap<K, V>): number;
+    [Symbol.iterator](): Generator<[K, V], void, unknown>;
+    eraseElementByIterator(iter: OrderedMapIterator<K, V>): OrderedMapIterator<K, V>;
+    forEach(callback: (element: [K, V], index: number, map: OrderedMap<K, V>) => void): void;
+    getElementByPos(pos: number): [K, V];
+}
+export default OrderedMap;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedMap.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedMap.js
new file mode 100644
index 0000000..79fdc02
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedMap.js
@@ -0,0 +1,127 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _Base = _interopRequireDefault(require("./Base"));
+
+var _TreeIterator = _interopRequireDefault(require("./Base/TreeIterator"));
+
+var _throwError = require("../../utils/throwError");
+
+function _interopRequireDefault(r) {
+    return r && r.t ? r : {
+        default: r
+    };
+}
+
+class OrderedMapIterator extends _TreeIterator.default {
+    constructor(r, t, e, s) {
+        super(r, t, s);
+        this.container = e;
+    }
+    get pointer() {
+        if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+        }
+        const r = this;
+        return new Proxy([], {
+            get(t, e) {
+                if (e === "0") return r.o.u; else if (e === "1") return r.o.l;
+            },
+            set(t, e, s) {
+                if (e !== "1") {
+                    throw new TypeError("props must be 1");
+                }
+                r.o.l = s;
+                return true;
+            }
+        });
+    }
+    copy() {
+        return new OrderedMapIterator(this.o, this.h, this.container, this.iteratorType);
+    }
+}
+
+class OrderedMap extends _Base.default {
+    constructor(r = [], t, e) {
+        super(t, e);
+        const s = this;
+        r.forEach((function(r) {
+            s.setElement(r[0], r[1]);
+        }));
+    }
+    * K(r) {
+        if (r === undefined) return;
+        yield* this.K(r.U);
+        yield [ r.u, r.l ];
+        yield* this.K(r.W);
+    }
+    begin() {
+        return new OrderedMapIterator(this.h.U || this.h, this.h, this);
+    }
+    end() {
+        return new OrderedMapIterator(this.h, this.h, this);
+    }
+    rBegin() {
+        return new OrderedMapIterator(this.h.W || this.h, this.h, this, 1);
+    }
+    rEnd() {
+        return new OrderedMapIterator(this.h, this.h, this, 1);
+    }
+    front() {
+        if (this.i === 0) return;
+        const r = this.h.U;
+        return [ r.u, r.l ];
+    }
+    back() {
+        if (this.i === 0) return;
+        const r = this.h.W;
+        return [ r.u, r.l ];
+    }
+    lowerBound(r) {
+        const t = this.X(this.Y, r);
+        return new OrderedMapIterator(t, this.h, this);
+    }
+    upperBound(r) {
+        const t = this.Z(this.Y, r);
+        return new OrderedMapIterator(t, this.h, this);
+    }
+    reverseLowerBound(r) {
+        const t = this.$(this.Y, r);
+        return new OrderedMapIterator(t, this.h, this);
+    }
+    reverseUpperBound(r) {
+        const t = this.rr(this.Y, r);
+        return new OrderedMapIterator(t, this.h, this);
+    }
+    setElement(r, t, e) {
+        return this.M(r, t, e);
+    }
+    find(r) {
+        const t = this.I(this.Y, r);
+        return new OrderedMapIterator(t, this.h, this);
+    }
+    getElementByKey(r) {
+        const t = this.I(this.Y, r);
+        return t.l;
+    }
+    union(r) {
+        const t = this;
+        r.forEach((function(r) {
+            t.setElement(r[0], r[1]);
+        }));
+        return this.i;
+    }
+    [Symbol.iterator]() {
+        return this.K(this.Y);
+    }
+}
+
+var _default = OrderedMap;
+
+exports.default = _default;
+//# sourceMappingURL=OrderedMap.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedMap.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedMap.js.map
new file mode 100644
index 0000000..e7bb936
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedMap.js.map
@@ -0,0 +1 @@
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The initialization container.\n     * @param cmp - The compare function.\n     * @param enableIndex - Whether to enable iterator indexing function.\n     * @example\n     * new OrderedMap();\n     * new OrderedMap([[0, 1], [2, 1]]);\n     * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y);\n     * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y, true);\n     */\n    constructor(container = [], cmp, enableIndex) {\n        super(cmp, enableIndex);\n        const self = this;\n        container.forEach(function (el) {\n            self.setElement(el[0], el[1]);\n        });\n    }\n    /**\n     * @internal\n     */\n    *_iterationFunc(curNode) {\n        if (curNode === undefined)\n            return;\n        yield* this._iterationFunc(curNode._left);\n        yield [curNode._key, curNode._value];\n        yield* this._iterationFunc(curNode._right);\n    }\n    begin() {\n        return new OrderedMapIterator(this._header._left || this._header, this._header, this);\n    }\n    end() {\n        return new OrderedMapIterator(this._header, this._header, this);\n    }\n    rBegin() {\n        return new OrderedMapIterator(this._header._right || this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    }\n    rEnd() {\n        return new OrderedMapIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    }\n    front() {\n        if (this._length === 0)\n            return;\n        const minNode = this._header._left;\n        return [minNode._key, minNode._value];\n    }\n    back() {\n        if (this._length === 0)\n            return;\n        const maxNode = this._header._right;\n        return [maxNode._key, maxNode._value];\n    }\n    lowerBound(key) {\n        const resNode = this._lowerBound(this._root, key);\n        return new OrderedMapIterator(resNode, this._header, this);\n    }\n    upperBound(key) {\n        const resNode = this._upperBound(this._root, key);\n        return new OrderedMapIterator(resNode, this._header, this);\n    }\n    reverseLowerBound(key) {\n        const resNode = this._reverseLowerBound(this._root, key);\n        return new OrderedMapIterator(resNode, this._header, this);\n    }\n    reverseUpperBound(key) {\n        const resNode = this._reverseUpperBound(this._root, key);\n        return new OrderedMapIterator(resNode, this._header, this);\n    }\n    /**\n     * @description Insert a key-value pair or set value by the given key.\n     * @param key - The key want to insert.\n     * @param value - The value want to set.\n     * @param hint - You can give an iterator hint to improve insertion efficiency.\n     * @return The size of container after setting.\n     * @example\n     * const mp = new OrderedMap([[2, 0], [4, 0], [5, 0]]);\n     * const iter = mp.begin();\n     * mp.setElement(1, 0);\n     * mp.setElement(3, 0, iter);  // give a hint will be faster.\n     */\n    setElement(key, value, hint) {\n        return this._set(key, value, hint);\n    }\n    find(key) {\n        const curNode = this._findElementNode(this._root, key);\n        return new OrderedMapIterator(curNode, this._header, this);\n    }\n    /**\n     * @description Get the value of the element of the specified key.\n     * @param key - The specified key you want to get.\n     * @example\n     * const val = container.getElementByKey(1);\n     */\n    getElementByKey(key) {\n        const curNode = this._findElementNode(this._root, key);\n        return curNode._value;\n    }\n    union(other) {\n        const self = this;\n        other.forEach(function (el) {\n            self.setElement(el[0], el[1]);\n        });\n        return this._length;\n    }\n    [Symbol.iterator]() {\n        return this._iterationFunc(this._root);\n    }\n}\nexport default OrderedMap;\n","import TreeContainer from './Base';\nimport TreeIterator from './Base/TreeIterator';\nimport { TreeNode } from './Base/TreeNode';\nimport { initContainer, IteratorType } from '@/container/ContainerBase';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nclass OrderedMapIterator<K, V> extends TreeIterator<K, V> {\n  container: OrderedMap<K, V>;\n  constructor(\n    node: TreeNode<K, V>,\n    header: TreeNode<K, V>,\n    container: OrderedMap<K, V>,\n    iteratorType?: IteratorType\n  ) {\n    super(node, header, iteratorType);\n    this.container = container;\n  }\n  get pointer() {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    const self = this;\n    return new Proxy(<[K, V]><unknown>[], {\n      get(_, props: '0' | '1') {\n        if (props === '0') return self._node._key;\n        else if (props === '1') return self._node._value;\n      },\n      set(_, props: '1', newValue: V) {\n        if (props !== '1') {\n          throw new TypeError('props must be 1');\n        }\n        self._node._value = newValue;\n        return true;\n      }\n    });\n  }\n  copy() {\n    return new OrderedMapIterator<K, V>(\n      this._node,\n      this._header,\n      this.container,\n      this.iteratorType\n    );\n  }\n  // @ts-ignore\n  equals(iter: OrderedMapIterator<K, V>): boolean;\n}\n\nexport type { OrderedMapIterator };\n\nclass OrderedMap<K, V> extends TreeContainer<K, V> {\n  /**\n   * @param container - The initialization container.\n   * @param cmp - The compare function.\n   * @param enableIndex - Whether to enable iterator indexing function.\n   * @example\n   * new OrderedMap();\n   * new OrderedMap([[0, 1], [2, 1]]);\n   * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y);\n   * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y, true);\n   */\n  constructor(\n    container: initContainer<[K, V]> = [],\n    cmp?: (x: K, y: K) => number,\n    enableIndex?: boolean\n  ) {\n    super(cmp, enableIndex);\n    const self = this;\n    container.forEach(function (el) {\n      self.setElement(el[0], el[1]);\n    });\n  }\n  /**\n   * @internal\n   */\n  private * _iterationFunc(\n    curNode: TreeNode<K, V> | undefined\n  ): Generator<[K, V], void> {\n    if (curNode === undefined) return;\n    yield * this._iterationFunc(curNode._left);\n    yield <[K, V]>[curNode._key, curNode._value];\n    yield * this._iterationFunc(curNode._right);\n  }\n  begin() {\n    return new OrderedMapIterator<K, V>(this._header._left || this._header, this._header, this);\n  }\n  end() {\n    return new OrderedMapIterator<K, V>(this._header, this._header, this);\n  }\n  rBegin() {\n    return new OrderedMapIterator<K, V>(\n      this._header._right || this._header,\n      this._header,\n      this,\n      IteratorType.REVERSE\n    );\n  }\n  rEnd() {\n    return new OrderedMapIterator<K, V>(this._header, this._header, this, IteratorType.REVERSE);\n  }\n  front() {\n    if (this._length === 0) return;\n    const minNode = this._header._left!;\n    return <[K, V]>[minNode._key, minNode._value];\n  }\n  back() {\n    if (this._length === 0) return;\n    const maxNode = this._header._right!;\n    return <[K, V]>[maxNode._key, maxNode._value];\n  }\n  lowerBound(key: K) {\n    const resNode = this._lowerBound(this._root, key);\n    return new OrderedMapIterator<K, V>(resNode, this._header, this);\n  }\n  upperBound(key: K) {\n    const resNode = this._upperBound(this._root, key);\n    return new OrderedMapIterator<K, V>(resNode, this._header, this);\n  }\n  reverseLowerBound(key: K) {\n    const resNode = this._reverseLowerBound(this._root, key);\n    return new OrderedMapIterator<K, V>(resNode, this._header, this);\n  }\n  reverseUpperBound(key: K) {\n    const resNode = this._reverseUpperBound(this._root, key);\n    return new OrderedMapIterator<K, V>(resNode, this._header, this);\n  }\n  /**\n   * @description Insert a key-value pair or set value by the given key.\n   * @param key - The key want to insert.\n   * @param value - The value want to set.\n   * @param hint - You can give an iterator hint to improve insertion efficiency.\n   * @return The size of container after setting.\n   * @example\n   * const mp = new OrderedMap([[2, 0], [4, 0], [5, 0]]);\n   * const iter = mp.begin();\n   * mp.setElement(1, 0);\n   * mp.setElement(3, 0, iter);  // give a hint will be faster.\n   */\n  setElement(key: K, value: V, hint?: OrderedMapIterator<K, V>) {\n    return this._set(key, value, hint);\n  }\n  find(key: K) {\n    const curNode = this._findElementNode(this._root, key);\n    return new OrderedMapIterator<K, V>(curNode, this._header, this);\n  }\n  /**\n   * @description Get the value of the element of the specified key.\n   * @param key - The specified key you want to get.\n   * @example\n   * const val = container.getElementByKey(1);\n   */\n  getElementByKey(key: K) {\n    const curNode = this._findElementNode(this._root, key);\n    return curNode._value;\n  }\n  union(other: OrderedMap<K, V>) {\n    const self = this;\n    other.forEach(function (el) {\n      self.setElement(el[0], el[1]);\n    });\n    return this._length;\n  }\n  [Symbol.iterator]() {\n    return this._iterationFunc(this._root);\n  }\n  // @ts-ignore\n  eraseElementByIterator(iter: OrderedMapIterator<K, V>): OrderedMapIterator<K, V>;\n  // @ts-ignore\n  forEach(callback: (element: [K, V], index: number, map: OrderedMap<K, V>) => void): void;\n  // @ts-ignore\n  getElementByPos(pos: number): [K, V];\n}\n\nexport default OrderedMap;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedSet.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedSet.d.ts
new file mode 100644
index 0000000..e946983
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedSet.d.ts
@@ -0,0 +1,54 @@
+import TreeContainer from './Base';
+import TreeIterator from './Base/TreeIterator';
+import { TreeNode } from './Base/TreeNode';
+import { initContainer, IteratorType } from "../ContainerBase";
+declare class OrderedSetIterator<K> extends TreeIterator<K, undefined> {
+    container: OrderedSet<K>;
+    constructor(node: TreeNode<K, undefined>, header: TreeNode<K, undefined>, container: OrderedSet<K>, iteratorType?: IteratorType);
+    get pointer(): NonNullable<K>;
+    copy(): OrderedSetIterator<K>;
+    equals(iter: OrderedSetIterator<K>): boolean;
+}
+export type { OrderedSetIterator };
+declare class OrderedSet<K> extends TreeContainer<K, undefined> {
+    /**
+     * @param container - The initialization container.
+     * @param cmp - The compare function.
+     * @param enableIndex - Whether to enable iterator indexing function.
+     * @example
+     * new OrderedSet();
+     * new OrderedSet([0, 1, 2]);
+     * new OrderedSet([0, 1, 2], (x, y) => x - y);
+     * new OrderedSet([0, 1, 2], (x, y) => x - y, true);
+     */
+    constructor(container?: initContainer<K>, cmp?: (x: K, y: K) => number, enableIndex?: boolean);
+    begin(): OrderedSetIterator<K>;
+    end(): OrderedSetIterator<K>;
+    rBegin(): OrderedSetIterator<K>;
+    rEnd(): OrderedSetIterator<K>;
+    front(): K | undefined;
+    back(): K | undefined;
+    /**
+     * @description Insert element to set.
+     * @param key - The key want to insert.
+     * @param hint - You can give an iterator hint to improve insertion efficiency.
+     * @return The size of container after setting.
+     * @example
+     * const st = new OrderedSet([2, 4, 5]);
+     * const iter = st.begin();
+     * st.insert(1);
+     * st.insert(3, iter);  // give a hint will be faster.
+     */
+    insert(key: K, hint?: OrderedSetIterator<K>): number;
+    find(element: K): OrderedSetIterator<K>;
+    lowerBound(key: K): OrderedSetIterator<K>;
+    upperBound(key: K): OrderedSetIterator<K>;
+    reverseLowerBound(key: K): OrderedSetIterator<K>;
+    reverseUpperBound(key: K): OrderedSetIterator<K>;
+    union(other: OrderedSet<K>): number;
+    [Symbol.iterator](): Generator<K, void, unknown>;
+    eraseElementByIterator(iter: OrderedSetIterator<K>): OrderedSetIterator<K>;
+    forEach(callback: (element: K, index: number, tree: OrderedSet<K>) => void): void;
+    getElementByPos(pos: number): K;
+}
+export default OrderedSet;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedSet.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedSet.js
new file mode 100644
index 0000000..c7af14d
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedSet.js
@@ -0,0 +1,107 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = void 0;
+
+var _Base = _interopRequireDefault(require("./Base"));
+
+var _TreeIterator = _interopRequireDefault(require("./Base/TreeIterator"));
+
+var _throwError = require("../../utils/throwError");
+
+function _interopRequireDefault(e) {
+    return e && e.t ? e : {
+        default: e
+    };
+}
+
+class OrderedSetIterator extends _TreeIterator.default {
+    constructor(e, t, r, i) {
+        super(e, t, i);
+        this.container = r;
+    }
+    get pointer() {
+        if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+        }
+        return this.o.u;
+    }
+    copy() {
+        return new OrderedSetIterator(this.o, this.h, this.container, this.iteratorType);
+    }
+}
+
+class OrderedSet extends _Base.default {
+    constructor(e = [], t, r) {
+        super(t, r);
+        const i = this;
+        e.forEach((function(e) {
+            i.insert(e);
+        }));
+    }
+    * K(e) {
+        if (e === undefined) return;
+        yield* this.K(e.U);
+        yield e.u;
+        yield* this.K(e.W);
+    }
+    begin() {
+        return new OrderedSetIterator(this.h.U || this.h, this.h, this);
+    }
+    end() {
+        return new OrderedSetIterator(this.h, this.h, this);
+    }
+    rBegin() {
+        return new OrderedSetIterator(this.h.W || this.h, this.h, this, 1);
+    }
+    rEnd() {
+        return new OrderedSetIterator(this.h, this.h, this, 1);
+    }
+    front() {
+        return this.h.U ? this.h.U.u : undefined;
+    }
+    back() {
+        return this.h.W ? this.h.W.u : undefined;
+    }
+    insert(e, t) {
+        return this.M(e, undefined, t);
+    }
+    find(e) {
+        const t = this.I(this.Y, e);
+        return new OrderedSetIterator(t, this.h, this);
+    }
+    lowerBound(e) {
+        const t = this.X(this.Y, e);
+        return new OrderedSetIterator(t, this.h, this);
+    }
+    upperBound(e) {
+        const t = this.Z(this.Y, e);
+        return new OrderedSetIterator(t, this.h, this);
+    }
+    reverseLowerBound(e) {
+        const t = this.$(this.Y, e);
+        return new OrderedSetIterator(t, this.h, this);
+    }
+    reverseUpperBound(e) {
+        const t = this.rr(this.Y, e);
+        return new OrderedSetIterator(t, this.h, this);
+    }
+    union(e) {
+        const t = this;
+        e.forEach((function(e) {
+            t.insert(e);
+        }));
+        return this.i;
+    }
+    [Symbol.iterator]() {
+        return this.K(this.Y);
+    }
+}
+
+var _default = OrderedSet;
+
+exports.default = _default;
+//# sourceMappingURL=OrderedSet.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedSet.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedSet.js.map
new file mode 100644
index 0000000..692ca52
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedSet.js.map
@@ -0,0 +1 @@
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The initialization container.\n     * @param cmp - The compare function.\n     * @param enableIndex - Whether to enable iterator indexing function.\n     * @example\n     * new OrderedSet();\n     * new OrderedSet([0, 1, 2]);\n     * new OrderedSet([0, 1, 2], (x, y) => x - y);\n     * new OrderedSet([0, 1, 2], (x, y) => x - y, true);\n     */\n    constructor(container = [], cmp, enableIndex) {\n        super(cmp, enableIndex);\n        const self = this;\n        container.forEach(function (el) {\n            self.insert(el);\n        });\n    }\n    /**\n     * @internal\n     */\n    *_iterationFunc(curNode) {\n        if (curNode === undefined)\n            return;\n        yield* this._iterationFunc(curNode._left);\n        yield curNode._key;\n        yield* this._iterationFunc(curNode._right);\n    }\n    begin() {\n        return new OrderedSetIterator(this._header._left || this._header, this._header, this);\n    }\n    end() {\n        return new OrderedSetIterator(this._header, this._header, this);\n    }\n    rBegin() {\n        return new OrderedSetIterator(this._header._right || this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    }\n    rEnd() {\n        return new OrderedSetIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    }\n    front() {\n        return this._header._left ? this._header._left._key : undefined;\n    }\n    back() {\n        return this._header._right ? this._header._right._key : undefined;\n    }\n    /**\n     * @description Insert element to set.\n     * @param key - The key want to insert.\n     * @param hint - You can give an iterator hint to improve insertion efficiency.\n     * @return The size of container after setting.\n     * @example\n     * const st = new OrderedSet([2, 4, 5]);\n     * const iter = st.begin();\n     * st.insert(1);\n     * st.insert(3, iter);  // give a hint will be faster.\n     */\n    insert(key, hint) {\n        return this._set(key, undefined, hint);\n    }\n    find(element) {\n        const resNode = this._findElementNode(this._root, element);\n        return new OrderedSetIterator(resNode, this._header, this);\n    }\n    lowerBound(key) {\n        const resNode = this._lowerBound(this._root, key);\n        return new OrderedSetIterator(resNode, this._header, this);\n    }\n    upperBound(key) {\n        const resNode = this._upperBound(this._root, key);\n        return new OrderedSetIterator(resNode, this._header, this);\n    }\n    reverseLowerBound(key) {\n        const resNode = this._reverseLowerBound(this._root, key);\n        return new OrderedSetIterator(resNode, this._header, this);\n    }\n    reverseUpperBound(key) {\n        const resNode = this._reverseUpperBound(this._root, key);\n        return new OrderedSetIterator(resNode, this._header, this);\n    }\n    union(other) {\n        const self = this;\n        other.forEach(function (el) {\n            self.insert(el);\n        });\n        return this._length;\n    }\n    [Symbol.iterator]() {\n        return this._iterationFunc(this._root);\n    }\n}\nexport default OrderedSet;\n","import TreeContainer from './Base';\nimport TreeIterator from './Base/TreeIterator';\nimport { TreeNode } from './Base/TreeNode';\nimport { initContainer, IteratorType } from '@/container/ContainerBase';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nclass OrderedSetIterator<K> extends TreeIterator<K, undefined> {\n  container: OrderedSet<K>;\n  constructor(\n    node: TreeNode<K, undefined>,\n    header: TreeNode<K, undefined>,\n    container: OrderedSet<K>,\n    iteratorType?: IteratorType\n  ) {\n    super(node, header, iteratorType);\n    this.container = container;\n  }\n  get pointer() {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    return this._node._key!;\n  }\n  copy() {\n    return new OrderedSetIterator<K>(\n      this._node,\n      this._header,\n      this.container,\n      this.iteratorType\n    );\n  }\n  // @ts-ignore\n  equals(iter: OrderedSetIterator<K>): boolean;\n}\n\nexport type { OrderedSetIterator };\n\nclass OrderedSet<K> extends TreeContainer<K, undefined> {\n  /**\n   * @param container - The initialization container.\n   * @param cmp - The compare function.\n   * @param enableIndex - Whether to enable iterator indexing function.\n   * @example\n   * new OrderedSet();\n   * new OrderedSet([0, 1, 2]);\n   * new OrderedSet([0, 1, 2], (x, y) => x - y);\n   * new OrderedSet([0, 1, 2], (x, y) => x - y, true);\n   */\n  constructor(\n    container: initContainer<K> = [],\n    cmp?: (x: K, y: K) => number,\n    enableIndex?: boolean\n  ) {\n    super(cmp, enableIndex);\n    const self = this;\n    container.forEach(function (el) {\n      self.insert(el);\n    });\n  }\n  /**\n   * @internal\n   */\n  private * _iterationFunc(\n    curNode: TreeNode<K, undefined> | undefined\n  ): Generator<K, void> {\n    if (curNode === undefined) return;\n    yield * this._iterationFunc(curNode._left);\n    yield curNode._key!;\n    yield * this._iterationFunc(curNode._right);\n  }\n  begin() {\n    return new OrderedSetIterator<K>(\n      this._header._left || this._header,\n      this._header,\n      this\n    );\n  }\n  end() {\n    return new OrderedSetIterator<K>(this._header, this._header, this);\n  }\n  rBegin() {\n    return new OrderedSetIterator<K>(\n      this._header._right || this._header,\n      this._header,\n      this,\n      IteratorType.REVERSE\n    );\n  }\n  rEnd() {\n    return new OrderedSetIterator<K>(this._header, this._header, this, IteratorType.REVERSE);\n  }\n  front() {\n    return this._header._left ? this._header._left._key : undefined;\n  }\n  back() {\n    return this._header._right ? this._header._right._key : undefined;\n  }\n  /**\n   * @description Insert element to set.\n   * @param key - The key want to insert.\n   * @param hint - You can give an iterator hint to improve insertion efficiency.\n   * @return The size of container after setting.\n   * @example\n   * const st = new OrderedSet([2, 4, 5]);\n   * const iter = st.begin();\n   * st.insert(1);\n   * st.insert(3, iter);  // give a hint will be faster.\n   */\n  insert(key: K, hint?: OrderedSetIterator<K>) {\n    return this._set(key, undefined, hint);\n  }\n  find(element: K) {\n    const resNode = this._findElementNode(this._root, element);\n    return new OrderedSetIterator<K>(resNode, this._header, this);\n  }\n  lowerBound(key: K) {\n    const resNode = this._lowerBound(this._root, key);\n    return new OrderedSetIterator<K>(resNode, this._header, this);\n  }\n  upperBound(key: K) {\n    const resNode = this._upperBound(this._root, key);\n    return new OrderedSetIterator<K>(resNode, this._header, this);\n  }\n  reverseLowerBound(key: K) {\n    const resNode = this._reverseLowerBound(this._root, key);\n    return new OrderedSetIterator<K>(resNode, this._header, this);\n  }\n  reverseUpperBound(key: K) {\n    const resNode = this._reverseUpperBound(this._root, key);\n    return new OrderedSetIterator<K>(resNode, this._header, this);\n  }\n  union(other: OrderedSet<K>) {\n    const self = this;\n    other.forEach(function (el) {\n      self.insert(el);\n    });\n    return this._length;\n  }\n  [Symbol.iterator]() {\n    return this._iterationFunc(this._root);\n  }\n  // @ts-ignore\n  eraseElementByIterator(iter: OrderedSetIterator<K>): OrderedSetIterator<K>;\n  // @ts-ignore\n  forEach(callback: (element: K, index: number, tree: OrderedSet<K>) => void): void;\n  // @ts-ignore\n  getElementByPos(pos: number): K;\n}\n\nexport default OrderedSet;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/index.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/index.d.ts
new file mode 100644
index 0000000..a379bce
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/index.d.ts
@@ -0,0 +1,21 @@
+export { default as Stack } from "./container/OtherContainer/Stack";
+export { default as Queue } from "./container/OtherContainer/Queue";
+export { default as PriorityQueue } from "./container/OtherContainer/PriorityQueue";
+export { default as Vector } from "./container/SequentialContainer/Vector";
+export { default as LinkList } from "./container/SequentialContainer/LinkList";
+export { default as Deque } from "./container/SequentialContainer/Deque";
+export { default as OrderedSet } from "./container/TreeContainer/OrderedSet";
+export { default as OrderedMap } from "./container/TreeContainer/OrderedMap";
+export { default as HashSet } from "./container/HashContainer/HashSet";
+export { default as HashMap } from "./container/HashContainer/HashMap";
+export type { VectorIterator } from "./container/SequentialContainer/Vector";
+export type { LinkListIterator } from "./container/SequentialContainer/LinkList";
+export type { DequeIterator } from "./container/SequentialContainer/Deque";
+export type { OrderedSetIterator } from "./container/TreeContainer/OrderedSet";
+export type { OrderedMapIterator } from "./container/TreeContainer/OrderedMap";
+export type { HashSetIterator } from "./container/HashContainer/HashSet";
+export type { HashMapIterator } from "./container/HashContainer/HashMap";
+export type { IteratorType, Container, ContainerIterator } from "./container/ContainerBase";
+export type { default as SequentialContainer } from "./container/SequentialContainer/Base";
+export type { default as TreeContainer } from "./container/TreeContainer/Base";
+export type { HashContainer } from "./container/HashContainer/Base";
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/index.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/index.js
new file mode 100644
index 0000000..a6d00a4
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/index.js
@@ -0,0 +1,102 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+Object.defineProperty(exports, "Deque", {
+    enumerable: true,
+    get: function() {
+        return _Deque.default;
+    }
+});
+
+Object.defineProperty(exports, "HashMap", {
+    enumerable: true,
+    get: function() {
+        return _HashMap.default;
+    }
+});
+
+Object.defineProperty(exports, "HashSet", {
+    enumerable: true,
+    get: function() {
+        return _HashSet.default;
+    }
+});
+
+Object.defineProperty(exports, "LinkList", {
+    enumerable: true,
+    get: function() {
+        return _LinkList.default;
+    }
+});
+
+Object.defineProperty(exports, "OrderedMap", {
+    enumerable: true,
+    get: function() {
+        return _OrderedMap.default;
+    }
+});
+
+Object.defineProperty(exports, "OrderedSet", {
+    enumerable: true,
+    get: function() {
+        return _OrderedSet.default;
+    }
+});
+
+Object.defineProperty(exports, "PriorityQueue", {
+    enumerable: true,
+    get: function() {
+        return _PriorityQueue.default;
+    }
+});
+
+Object.defineProperty(exports, "Queue", {
+    enumerable: true,
+    get: function() {
+        return _Queue.default;
+    }
+});
+
+Object.defineProperty(exports, "Stack", {
+    enumerable: true,
+    get: function() {
+        return _Stack.default;
+    }
+});
+
+Object.defineProperty(exports, "Vector", {
+    enumerable: true,
+    get: function() {
+        return _Vector.default;
+    }
+});
+
+var _Stack = _interopRequireDefault(require("./container/OtherContainer/Stack"));
+
+var _Queue = _interopRequireDefault(require("./container/OtherContainer/Queue"));
+
+var _PriorityQueue = _interopRequireDefault(require("./container/OtherContainer/PriorityQueue"));
+
+var _Vector = _interopRequireDefault(require("./container/SequentialContainer/Vector"));
+
+var _LinkList = _interopRequireDefault(require("./container/SequentialContainer/LinkList"));
+
+var _Deque = _interopRequireDefault(require("./container/SequentialContainer/Deque"));
+
+var _OrderedSet = _interopRequireDefault(require("./container/TreeContainer/OrderedSet"));
+
+var _OrderedMap = _interopRequireDefault(require("./container/TreeContainer/OrderedMap"));
+
+var _HashSet = _interopRequireDefault(require("./container/HashContainer/HashSet"));
+
+var _HashMap = _interopRequireDefault(require("./container/HashContainer/HashMap"));
+
+function _interopRequireDefault(e) {
+    return e && e.t ? e : {
+        default: e
+    };
+}
+//# sourceMappingURL=index.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/index.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/index.js.map
new file mode 100644
index 0000000..3f0418b
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/index.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["index.js","../../src/index.ts"],"names":["Object","defineProperty","exports","value","enumerable","get","_Deque","default","_HashMap","_HashSet","_LinkList","_OrderedMap","_OrderedSet","_PriorityQueue","_Queue","_Stack","_Vector","_interopRequireDefault","require","obj","__esModule"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETH,OAAOC,eAAeC,SAAS,SAAS;IACtCE,YAAY;IACZC,KAAK;QACH,OAAOC,OAAOC;AAChB;;;AAEFP,OAAOC,eAAeC,SAAS,WAAW;IACxCE,YAAY;IACZC,KAAK;QACH,OAAOG,SAASD;AAClB;;;AAEFP,OAAOC,eAAeC,SAAS,WAAW;IACxCE,YAAY;IACZC,KAAK;QACH,OAAOI,SAASF;AAClB;;;AAEFP,OAAOC,eAAeC,SAAS,YAAY;IACzCE,YAAY;IACZC,KAAK;QACH,OAAOK,UAAUH;AACnB;;;AAEFP,OAAOC,eAAeC,SAAS,cAAc;IAC3CE,YAAY;IACZC,KAAK;QACH,OAAOM,YAAYJ;AACrB;;;AAEFP,OAAOC,eAAeC,SAAS,cAAc;IAC3CE,YAAY;IACZC,KAAK;QACH,OAAOO,YAAYL;AACrB;;;AAEFP,OAAOC,eAAeC,SAAS,iBAAiB;IAC9CE,YAAY;IACZC,KAAK;QACH,OAAOQ,eAAeN;AACxB;;;AAEFP,OAAOC,eAAeC,SAAS,SAAS;IACtCE,YAAY;IACZC,KAAK;QACH,OAAOS,OAAOP;AAChB;;;AAEFP,OAAOC,eAAeC,SAAS,SAAS;IACtCE,YAAY;IACZC,KAAK;QACH,OAAOU,OAAOR;AAChB;;;AAEFP,OAAOC,eAAeC,SAAS,UAAU;IACvCE,YAAY;IACZC,KAAK;QACH,OAAOW,QAAQT;AACjB;;;AC/DF,IAAAQ,SAAAE,uBAAAC,QAAA;;AACA,IAAAJ,SAAAG,uBAAAC,QAAA;;AACA,IAAAL,iBAAAI,uBAAAC,QAAA;;AACA,IAAAF,UAAAC,uBAAAC,QAAA;;AACA,IAAAR,YAAAO,uBAAAC,QAAA;;AACA,IAAAZ,SAAAW,uBAAAC,QAAA;;AACA,IAAAN,cAAAK,uBAAAC,QAAA;;AACA,IAAAP,cAAAM,uBAAAC,QAAA;;AACA,IAAAT,WAAAQ,uBAAAC,QAAA;;AACA,IAAAV,WAAAS,uBAAAC,QAAA;;AAAuE,SAAAD,uBAAAE;IAAA,OAAAA,KAAAA,EAAAC,IAAAD,IAAA;QAAAZ,SAAAY;;AAAA","file":"index.js","sourcesContent":[null,"export { default as Stack } from '@/container/OtherContainer/Stack';\nexport { default as Queue } from '@/container/OtherContainer/Queue';\nexport { default as PriorityQueue } from '@/container/OtherContainer/PriorityQueue';\nexport { default as Vector } from '@/container/SequentialContainer/Vector';\nexport { default as LinkList } from '@/container/SequentialContainer/LinkList';\nexport { default as Deque } from '@/container/SequentialContainer/Deque';\nexport { default as OrderedSet } from '@/container/TreeContainer/OrderedSet';\nexport { default as OrderedMap } from '@/container/TreeContainer/OrderedMap';\nexport { default as HashSet } from '@/container/HashContainer/HashSet';\nexport { default as HashMap } from '@/container/HashContainer/HashMap';\nexport type { VectorIterator } from '@/container/SequentialContainer/Vector';\nexport type { LinkListIterator } from '@/container/SequentialContainer/LinkList';\nexport type { DequeIterator } from '@/container/SequentialContainer/Deque';\nexport type { OrderedSetIterator } from '@/container/TreeContainer/OrderedSet';\nexport type { OrderedMapIterator } from '@/container/TreeContainer/OrderedMap';\nexport type { HashSetIterator } from '@/container/HashContainer/HashSet';\nexport type { HashMapIterator } from '@/container/HashContainer/HashMap';\nexport type { IteratorType, Container, ContainerIterator } from '@/container/ContainerBase';\nexport type { default as SequentialContainer } from '@/container/SequentialContainer/Base';\nexport type { default as TreeContainer } from '@/container/TreeContainer/Base';\nexport type { HashContainer } from '@/container/HashContainer/Base';\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/checkObject.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/checkObject.d.ts
new file mode 100644
index 0000000..cb0ff5c
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/checkObject.d.ts
@@ -0,0 +1 @@
+export {};
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/checkObject.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/checkObject.js
new file mode 100644
index 0000000..1c93a90
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/checkObject.js
@@ -0,0 +1,13 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.default = checkObject;
+
+function checkObject(e) {
+    const t = typeof e;
+    return t === "object" && e !== null || t === "function";
+}
+//# sourceMappingURL=checkObject.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/checkObject.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/checkObject.js.map
new file mode 100644
index 0000000..f8d1fc5
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/checkObject.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["utils/checkObject.js","../../src/utils/checkObject.ts"],"names":["Object","defineProperty","exports","value","default","checkObject","key","t"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,UAAUC;;ACCJ,SAAUA,YAAeC;IACrC,MAAMC,WAAWD;IACjB,OAAQC,MAAM,YAAYD,MAAQ,QAASC,MAAM;ADCnD","file":"checkObject.js","sourcesContent":["/**\n * @description Determine whether the type of key is `object`.\n * @param key - The key want to check.\n * @returns Whether the type of key is `object`.\n * @internal\n */\nexport default function checkObject(key) {\n    const t = typeof key;\n    return (t === 'object' && key !== null) || t === 'function';\n}\n","/**\n * @description Determine whether the type of key is `object`.\n * @param key - The key want to check.\n * @returns Whether the type of key is `object`.\n * @internal\n */\nexport default function checkObject<T>(key: T) {\n  const t = typeof key;\n  return (t === 'object' && key !== null) || t === 'function';\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/throwError.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/throwError.d.ts
new file mode 100644
index 0000000..cb0ff5c
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/throwError.d.ts
@@ -0,0 +1 @@
+export {};
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/throwError.js b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/throwError.js
new file mode 100644
index 0000000..ea052b9
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/throwError.js
@@ -0,0 +1,12 @@
+"use strict";
+
+Object.defineProperty(exports, "t", {
+    value: true
+});
+
+exports.throwIteratorAccessError = throwIteratorAccessError;
+
+function throwIteratorAccessError() {
+    throw new RangeError("Iterator access denied!");
+}
+//# sourceMappingURL=throwError.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/throwError.js.map b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/throwError.js.map
new file mode 100644
index 0000000..81a5eeb
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/cjs/utils/throwError.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["utils/throwError.js","../../src/utils/throwError.ts"],"names":["Object","defineProperty","exports","value","throwIteratorAccessError","RangeError"],"mappings":"AAAA;;AAEAA,OAAOC,eAAeC,SAAS,KAAc;IAC3CC,OAAO;;;AAETD,QAAQE,2BAA2BA;;ACD7B,SAAUA;IACd,MAAM,IAAIC,WAAW;ADCvB","file":"throwError.js","sourcesContent":["/**\n * @description Throw an iterator access error.\n * @internal\n */\nexport function throwIteratorAccessError() {\n    throw new RangeError('Iterator access denied!');\n}\n","/**\n * @description Throw an iterator access error.\n * @internal\n */\nexport function throwIteratorAccessError() {\n  throw new RangeError('Iterator access denied!');\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/ContainerBase/index.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/ContainerBase/index.d.ts
new file mode 100644
index 0000000..12e1598
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/ContainerBase/index.d.ts
@@ -0,0 +1,206 @@
+/**
+ * @description The iterator type including `NORMAL` and `REVERSE`.
+ */
+export declare const enum IteratorType {
+    NORMAL = 0,
+    REVERSE = 1
+}
+export declare abstract class ContainerIterator<T> {
+    /**
+     * @description The container pointed to by the iterator.
+     */
+    abstract readonly container: Container<T>;
+    /**
+     * @description Iterator's type.
+     * @example
+     * console.log(container.end().iteratorType === IteratorType.NORMAL);  // true
+     */
+    readonly iteratorType: IteratorType;
+    /**
+     * @param iter - The other iterator you want to compare.
+     * @returns Whether this equals to obj.
+     * @example
+     * container.find(1).equals(container.end());
+     */
+    equals(iter: ContainerIterator<T>): boolean;
+    /**
+     * @description Pointers to element.
+     * @returns The value of the pointer's element.
+     * @example
+     * const val = container.begin().pointer;
+     */
+    abstract get pointer(): T;
+    /**
+     * @description Set pointer's value (some containers are unavailable).
+     * @param newValue - The new value you want to set.
+     * @example
+     * (<LinkList<number>>container).begin().pointer = 1;
+     */
+    abstract set pointer(newValue: T);
+    /**
+     * @description Move `this` iterator to pre.
+     * @returns The iterator's self.
+     * @example
+     * const iter = container.find(1);  // container = [0, 1]
+     * const pre = iter.pre();
+     * console.log(pre === iter);  // true
+     * console.log(pre.equals(iter));  // true
+     * console.log(pre.pointer, iter.pointer); // 0, 0
+     */
+    abstract pre(): this;
+    /**
+     * @description Move `this` iterator to next.
+     * @returns The iterator's self.
+     * @example
+     * const iter = container.find(1);  // container = [1, 2]
+     * const next = iter.next();
+     * console.log(next === iter);  // true
+     * console.log(next.equals(iter));  // true
+     * console.log(next.pointer, iter.pointer); // 2, 2
+     */
+    abstract next(): this;
+    /**
+     * @description Get a copy of itself.
+     * @returns The copy of self.
+     * @example
+     * const iter = container.find(1);  // container = [1, 2]
+     * const next = iter.copy().next();
+     * console.log(next === iter);  // false
+     * console.log(next.equals(iter));  // false
+     * console.log(next.pointer, iter.pointer); // 2, 1
+     */
+    abstract copy(): ContainerIterator<T>;
+}
+export declare abstract class Base {
+    /**
+     * @returns The size of the container.
+     * @example
+     * const container = new Vector([1, 2]);
+     * console.log(container.length); // 2
+     */
+    get length(): number;
+    /**
+     * @returns The size of the container.
+     * @example
+     * const container = new Vector([1, 2]);
+     * console.log(container.size()); // 2
+     */
+    size(): number;
+    /**
+     * @returns Whether the container is empty.
+     * @example
+     * container.clear();
+     * console.log(container.empty());  // true
+     */
+    empty(): boolean;
+    /**
+     * @description Clear the container.
+     * @example
+     * container.clear();
+     * console.log(container.empty());  // true
+     */
+    abstract clear(): void;
+}
+export declare abstract class Container<T> extends Base {
+    /**
+     * @returns Iterator pointing to the beginning element.
+     * @example
+     * const begin = container.begin();
+     * const end = container.end();
+     * for (const it = begin; !it.equals(end); it.next()) {
+     *   doSomething(it.pointer);
+     * }
+     */
+    abstract begin(): ContainerIterator<T>;
+    /**
+     * @returns Iterator pointing to the super end like c++.
+     * @example
+     * const begin = container.begin();
+     * const end = container.end();
+     * for (const it = begin; !it.equals(end); it.next()) {
+     *   doSomething(it.pointer);
+     * }
+     */
+    abstract end(): ContainerIterator<T>;
+    /**
+     * @returns Iterator pointing to the end element.
+     * @example
+     * const rBegin = container.rBegin();
+     * const rEnd = container.rEnd();
+     * for (const it = rBegin; !it.equals(rEnd); it.next()) {
+     *   doSomething(it.pointer);
+     * }
+     */
+    abstract rBegin(): ContainerIterator<T>;
+    /**
+     * @returns Iterator pointing to the super begin like c++.
+     * @example
+     * const rBegin = container.rBegin();
+     * const rEnd = container.rEnd();
+     * for (const it = rBegin; !it.equals(rEnd); it.next()) {
+     *   doSomething(it.pointer);
+     * }
+     */
+    abstract rEnd(): ContainerIterator<T>;
+    /**
+     * @returns The first element of the container.
+     */
+    abstract front(): T | undefined;
+    /**
+     * @returns The last element of the container.
+     */
+    abstract back(): T | undefined;
+    /**
+     * @param element - The element you want to find.
+     * @returns An iterator pointing to the element if found, or super end if not found.
+     * @example
+     * container.find(1).equals(container.end());
+     */
+    abstract find(element: T): ContainerIterator<T>;
+    /**
+     * @description Iterate over all elements in the container.
+     * @param callback - Callback function like Array.forEach.
+     * @example
+     * container.forEach((element, index) => console.log(element, index));
+     */
+    abstract forEach(callback: (element: T, index: number, container: Container<T>) => void): void;
+    /**
+     * @description Gets the value of the element at the specified position.
+     * @example
+     * const val = container.getElementByPos(-1); // throw a RangeError
+     */
+    abstract getElementByPos(pos: number): T;
+    /**
+     * @description Removes the element at the specified position.
+     * @param pos - The element's position you want to remove.
+     * @returns The container length after erasing.
+     * @example
+     * container.eraseElementByPos(-1); // throw a RangeError
+     */
+    abstract eraseElementByPos(pos: number): number;
+    /**
+     * @description Removes element by iterator and move `iter` to next.
+     * @param iter - The iterator you want to erase.
+     * @returns The next iterator.
+     * @example
+     * container.eraseElementByIterator(container.begin());
+     * container.eraseElementByIterator(container.end()); // throw a RangeError
+     */
+    abstract eraseElementByIterator(iter: ContainerIterator<T>): ContainerIterator<T>;
+    /**
+     * @description Using for `for...of` syntax like Array.
+     * @example
+     * for (const element of container) {
+     *   console.log(element);
+     * }
+     */
+    abstract [Symbol.iterator](): Generator<T, void>;
+}
+/**
+ * @description The initial data type passed in when initializing the container.
+ */
+export declare type initContainer<T> = {
+    size?: number | (() => number);
+    length?: number;
+    forEach: (callback: (el: T) => void) => void;
+};
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/ContainerBase/index.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/ContainerBase/index.js
new file mode 100644
index 0000000..d5e10db
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/ContainerBase/index.js
@@ -0,0 +1,68 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(n, t) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(n, t) {
+            n.__proto__ = t;
+        } || function(n, t) {
+            for (var r in t) if (Object.prototype.hasOwnProperty.call(t, r)) n[r] = t[r];
+        };
+        return extendStatics(n, t);
+    };
+    return function(n, t) {
+        if (typeof t !== "function" && t !== null) throw new TypeError("Class extends value " + String(t) + " is not a constructor or null");
+        extendStatics(n, t);
+        function __() {
+            this.constructor = n;
+        }
+        n.prototype = t === null ? Object.create(t) : (__.prototype = t.prototype, new __);
+    };
+}();
+
+var ContainerIterator = function() {
+    function ContainerIterator(n) {
+        if (n === void 0) {
+            n = 0;
+        }
+        this.iteratorType = n;
+    }
+    ContainerIterator.prototype.equals = function(n) {
+        return this.o === n.o;
+    };
+    return ContainerIterator;
+}();
+
+export { ContainerIterator };
+
+var Base = function() {
+    function Base() {
+        this.M = 0;
+    }
+    Object.defineProperty(Base.prototype, "length", {
+        get: function() {
+            return this.M;
+        },
+        enumerable: false,
+        configurable: true
+    });
+    Base.prototype.size = function() {
+        return this.M;
+    };
+    Base.prototype.empty = function() {
+        return this.M === 0;
+    };
+    return Base;
+}();
+
+export { Base };
+
+var Container = function(n) {
+    __extends(Container, n);
+    function Container() {
+        return n !== null && n.apply(this, arguments) || this;
+    }
+    return Container;
+}(Base);
+
+export { Container };
+//# sourceMappingURL=index.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/ContainerBase/index.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/ContainerBase/index.js.map
new file mode 100644
index 0000000..d5ca0d5
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/ContainerBase/index.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/ContainerBase/index.js","../../src/container/ContainerBase/index.ts"],"names":["__extends","this","extendStatics","d","b","Object","setPrototypeOf","__proto__","Array","p","prototype","hasOwnProperty","call","TypeError","String","__","constructor","create","ContainerIterator","iteratorType","equals","iter","_node","Base","_length","defineProperty","get","enumerable","configurable","size","empty","Container","_super","apply","arguments"],"mappings":"AAAA,IAAIA,YAAaC,QAAQA,KAAKD,KAAe;IACzC,IAAIE,gBAAgB,SAAUC,GAAGC;QAC7BF,gBAAgBG,OAAOC,kBAClB;YAAEC,WAAW;qBAAgBC,SAAS,SAAUL,GAAGC;YAAKD,EAAEI,YAAYH;AAAG,aAC1E,SAAUD,GAAGC;YAAK,KAAK,IAAIK,KAAKL,GAAG,IAAIC,OAAOK,UAAUC,eAAeC,KAAKR,GAAGK,IAAIN,EAAEM,KAAKL,EAAEK;AAAI;QACpG,OAAOP,cAAcC,GAAGC;AAC5B;IACA,OAAO,SAAUD,GAAGC;QAChB,WAAWA,MAAM,cAAcA,MAAM,MACjC,MAAM,IAAIS,UAAU,yBAAyBC,OAAOV,KAAK;QAC7DF,cAAcC,GAAGC;QACjB,SAASW;YAAOd,KAAKe,cAAcb;AAAG;QACtCA,EAAEO,YAAYN,MAAM,OAAOC,OAAOY,OAAOb,MAAMW,GAAGL,YAAYN,EAAEM,WAAW,IAAIK;AACnF;AACJ,CAd6C;;ACQ7C,IAAAG,oBAAA;IAkBE,SAAAA,kBAAsBC;QAAA,IAAAA,WAAA,GAAA;YAAAA,IAAA;AAAkC;QACtDlB,KAAKkB,eAAeA;ADLpB;ICaFD,kBAAAR,UAAAU,SAAA,SAAOC;QACL,OAAOpB,KAAKqB,MAAUD,EAAKC;ADL3B;ICsDJ,OAAAJ;AAAA,CA7EA;;SD0BSA;;ACqDT,IAAAK,OAAA;IAAA,SAAAA;QAKYtB,KAAAuB,IAAU;AAmCtB;IA5BEnB,OAAAoB,eAAIF,KAAAb,WAAA,UAAM;QDjDJgB,KCiDN;YACE,OAAOzB,KAAKuB;ADhDR;QACAG,YAAY;QACZC,cAAc;;ICsDpBL,KAAAb,UAAAmB,OAAA;QACE,OAAO5B,KAAKuB;AD7CZ;ICqDFD,KAAAb,UAAAoB,QAAA;QACE,OAAO7B,KAAKuB,MAAY;AD7CxB;ICsDJ,OAAAD;AAAA,CAxCA;;SDXSA;;ACqDT,IAAAQ,YAAA,SAAAC;IAA2ChC,UAAA+B,WAAAC;IAA3C,SAAAD;QDjDQ,OAAOC,MAAW,QAAQA,EAAOC,MAAMhC,MAAMiC,cAAcjC;ACiJnE;IAAA,OAAA8B;AAAA,CAhGA,CAA2CR;;SD7ClCQ","file":"index.js","sourcesContent":["var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nvar ContainerIterator = /** @class */ (function () {\n    /**\n     * @internal\n     */\n    function ContainerIterator(iteratorType) {\n        if (iteratorType === void 0) { iteratorType = 0 /* IteratorType.NORMAL */; }\n        this.iteratorType = iteratorType;\n    }\n    /**\n     * @param iter - The other iterator you want to compare.\n     * @returns Whether this equals to obj.\n     * @example\n     * container.find(1).equals(container.end());\n     */\n    ContainerIterator.prototype.equals = function (iter) {\n        return this._node === iter._node;\n    };\n    return ContainerIterator;\n}());\nexport { ContainerIterator };\nvar Base = /** @class */ (function () {\n    function Base() {\n        /**\n         * @description Container's size.\n         * @internal\n         */\n        this._length = 0;\n    }\n    Object.defineProperty(Base.prototype, \"length\", {\n        /**\n         * @returns The size of the container.\n         * @example\n         * const container = new Vector([1, 2]);\n         * console.log(container.length); // 2\n         */\n        get: function () {\n            return this._length;\n        },\n        enumerable: false,\n        configurable: true\n    });\n    /**\n     * @returns The size of the container.\n     * @example\n     * const container = new Vector([1, 2]);\n     * console.log(container.size()); // 2\n     */\n    Base.prototype.size = function () {\n        return this._length;\n    };\n    /**\n     * @returns Whether the container is empty.\n     * @example\n     * container.clear();\n     * console.log(container.empty());  // true\n     */\n    Base.prototype.empty = function () {\n        return this._length === 0;\n    };\n    return Base;\n}());\nexport { Base };\nvar Container = /** @class */ (function (_super) {\n    __extends(Container, _super);\n    function Container() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    return Container;\n}(Base));\nexport { Container };\n","/**\n * @description The iterator type including `NORMAL` and `REVERSE`.\n */\nexport const enum IteratorType {\n  NORMAL = 0,\n  REVERSE = 1\n}\n\nexport abstract class ContainerIterator<T> {\n  /**\n   * @description The container pointed to by the iterator.\n   */\n  abstract readonly container: Container<T>;\n  /**\n   * @internal\n   */\n  abstract _node: unknown;\n  /**\n   * @description Iterator's type.\n   * @example\n   * console.log(container.end().iteratorType === IteratorType.NORMAL);  // true\n   */\n  readonly iteratorType: IteratorType;\n  /**\n   * @internal\n   */\n  protected constructor(iteratorType = IteratorType.NORMAL) {\n    this.iteratorType = iteratorType;\n  }\n  /**\n   * @param iter - The other iterator you want to compare.\n   * @returns Whether this equals to obj.\n   * @example\n   * container.find(1).equals(container.end());\n   */\n  equals(iter: ContainerIterator<T>) {\n    return this._node === iter._node;\n  }\n  /**\n   * @description Pointers to element.\n   * @returns The value of the pointer's element.\n   * @example\n   * const val = container.begin().pointer;\n   */\n  abstract get pointer(): T;\n  /**\n   * @description Set pointer's value (some containers are unavailable).\n   * @param newValue - The new value you want to set.\n   * @example\n   * (<LinkList<number>>container).begin().pointer = 1;\n   */\n  abstract set pointer(newValue: T);\n  /**\n   * @description Move `this` iterator to pre.\n   * @returns The iterator's self.\n   * @example\n   * const iter = container.find(1);  // container = [0, 1]\n   * const pre = iter.pre();\n   * console.log(pre === iter);  // true\n   * console.log(pre.equals(iter));  // true\n   * console.log(pre.pointer, iter.pointer); // 0, 0\n   */\n  abstract pre(): this;\n  /**\n   * @description Move `this` iterator to next.\n   * @returns The iterator's self.\n   * @example\n   * const iter = container.find(1);  // container = [1, 2]\n   * const next = iter.next();\n   * console.log(next === iter);  // true\n   * console.log(next.equals(iter));  // true\n   * console.log(next.pointer, iter.pointer); // 2, 2\n   */\n  abstract next(): this;\n  /**\n   * @description Get a copy of itself.\n   * @returns The copy of self.\n   * @example\n   * const iter = container.find(1);  // container = [1, 2]\n   * const next = iter.copy().next();\n   * console.log(next === iter);  // false\n   * console.log(next.equals(iter));  // false\n   * console.log(next.pointer, iter.pointer); // 2, 1\n   */\n  abstract copy(): ContainerIterator<T>;\n}\n\nexport abstract class Base {\n  /**\n   * @description Container's size.\n   * @internal\n   */\n  protected _length = 0;\n  /**\n   * @returns The size of the container.\n   * @example\n   * const container = new Vector([1, 2]);\n   * console.log(container.length); // 2\n   */\n  get length() {\n    return this._length;\n  }\n  /**\n   * @returns The size of the container.\n   * @example\n   * const container = new Vector([1, 2]);\n   * console.log(container.size()); // 2\n   */\n  size() {\n    return this._length;\n  }\n  /**\n   * @returns Whether the container is empty.\n   * @example\n   * container.clear();\n   * console.log(container.empty());  // true\n   */\n  empty() {\n    return this._length === 0;\n  }\n  /**\n   * @description Clear the container.\n   * @example\n   * container.clear();\n   * console.log(container.empty());  // true\n   */\n  abstract clear(): void;\n}\n\nexport abstract class Container<T> extends Base {\n  /**\n   * @returns Iterator pointing to the beginning element.\n   * @example\n   * const begin = container.begin();\n   * const end = container.end();\n   * for (const it = begin; !it.equals(end); it.next()) {\n   *   doSomething(it.pointer);\n   * }\n   */\n  abstract begin(): ContainerIterator<T>;\n  /**\n   * @returns Iterator pointing to the super end like c++.\n   * @example\n   * const begin = container.begin();\n   * const end = container.end();\n   * for (const it = begin; !it.equals(end); it.next()) {\n   *   doSomething(it.pointer);\n   * }\n   */\n  abstract end(): ContainerIterator<T>;\n  /**\n   * @returns Iterator pointing to the end element.\n   * @example\n   * const rBegin = container.rBegin();\n   * const rEnd = container.rEnd();\n   * for (const it = rBegin; !it.equals(rEnd); it.next()) {\n   *   doSomething(it.pointer);\n   * }\n   */\n  abstract rBegin(): ContainerIterator<T>;\n  /**\n   * @returns Iterator pointing to the super begin like c++.\n   * @example\n   * const rBegin = container.rBegin();\n   * const rEnd = container.rEnd();\n   * for (const it = rBegin; !it.equals(rEnd); it.next()) {\n   *   doSomething(it.pointer);\n   * }\n   */\n  abstract rEnd(): ContainerIterator<T>;\n  /**\n   * @returns The first element of the container.\n   */\n  abstract front(): T | undefined;\n  /**\n   * @returns The last element of the container.\n   */\n  abstract back(): T | undefined;\n  /**\n   * @param element - The element you want to find.\n   * @returns An iterator pointing to the element if found, or super end if not found.\n   * @example\n   * container.find(1).equals(container.end());\n   */\n  abstract find(element: T): ContainerIterator<T>;\n  /**\n   * @description Iterate over all elements in the container.\n   * @param callback - Callback function like Array.forEach.\n   * @example\n   * container.forEach((element, index) => console.log(element, index));\n   */\n  abstract forEach(callback: (element: T, index: number, container: Container<T>) => void): void;\n  /**\n   * @description Gets the value of the element at the specified position.\n   * @example\n   * const val = container.getElementByPos(-1); // throw a RangeError\n   */\n  abstract getElementByPos(pos: number): T;\n  /**\n   * @description Removes the element at the specified position.\n   * @param pos - The element's position you want to remove.\n   * @returns The container length after erasing.\n   * @example\n   * container.eraseElementByPos(-1); // throw a RangeError\n   */\n  abstract eraseElementByPos(pos: number): number;\n  /**\n   * @description Removes element by iterator and move `iter` to next.\n   * @param iter - The iterator you want to erase.\n   * @returns The next iterator.\n   * @example\n   * container.eraseElementByIterator(container.begin());\n   * container.eraseElementByIterator(container.end()); // throw a RangeError\n   */\n  abstract eraseElementByIterator(\n    iter: ContainerIterator<T>\n  ): ContainerIterator<T>;\n  /**\n   * @description Using for `for...of` syntax like Array.\n   * @example\n   * for (const element of container) {\n   *   console.log(element);\n   * }\n   */\n  abstract [Symbol.iterator](): Generator<T, void>;\n}\n\n/**\n * @description The initial data type passed in when initializing the container.\n */\nexport type initContainer<T> = {\n  size?: number | (() => number);\n  length?: number;\n  forEach: (callback: (el: T) => void) => void;\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/Base/index.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/Base/index.d.ts
new file mode 100644
index 0000000..43aa866
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/Base/index.d.ts
@@ -0,0 +1,29 @@
+import { Container, ContainerIterator } from "../../ContainerBase";
+export declare type HashLinkNode<K, V> = {
+    _key: K;
+    _value: V;
+    _pre: HashLinkNode<K, V>;
+    _next: HashLinkNode<K, V>;
+};
+export declare abstract class HashContainerIterator<K, V> extends ContainerIterator<K | [K, V]> {
+    abstract readonly container: HashContainer<K, V>;
+    pre(): this;
+    next(): this;
+}
+export declare abstract class HashContainer<K, V> extends Container<K | [K, V]> {
+    /**
+     * @description Unique symbol used to tag object.
+     */
+    readonly HASH_TAG: symbol;
+    clear(): void;
+    /**
+     * @description Remove the element of the specified key.
+     * @param key - The key you want to remove.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @returns Whether erase successfully.
+     */
+    eraseElementByKey(key: K, isObject?: boolean): boolean;
+    eraseElementByIterator(iter: HashContainerIterator<K, V>): HashContainerIterator<K, V>;
+    eraseElementByPos(pos: number): number;
+}
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/Base/index.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/Base/index.js
new file mode 100644
index 0000000..028b7d4
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/Base/index.js
@@ -0,0 +1,201 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(t, i) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(t, i) {
+            t.__proto__ = i;
+        } || function(t, i) {
+            for (var r in i) if (Object.prototype.hasOwnProperty.call(i, r)) t[r] = i[r];
+        };
+        return extendStatics(t, i);
+    };
+    return function(t, i) {
+        if (typeof i !== "function" && i !== null) throw new TypeError("Class extends value " + String(i) + " is not a constructor or null");
+        extendStatics(t, i);
+        function __() {
+            this.constructor = t;
+        }
+        t.prototype = i === null ? Object.create(i) : (__.prototype = i.prototype, new __);
+    };
+}();
+
+import { Container, ContainerIterator } from "../../ContainerBase";
+
+import checkObject from "../../../utils/checkObject";
+
+import { throwIteratorAccessError } from "../../../utils/throwError";
+
+var HashContainerIterator = function(t) {
+    __extends(HashContainerIterator, t);
+    function HashContainerIterator(i, r, e) {
+        var n = t.call(this, e) || this;
+        n.o = i;
+        n.h = r;
+        if (n.iteratorType === 0) {
+            n.pre = function() {
+                if (this.o.L === this.h) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.L;
+                return this;
+            };
+            n.next = function() {
+                if (this.o === this.h) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.m;
+                return this;
+            };
+        } else {
+            n.pre = function() {
+                if (this.o.m === this.h) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.m;
+                return this;
+            };
+            n.next = function() {
+                if (this.o === this.h) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.L;
+                return this;
+            };
+        }
+        return n;
+    }
+    return HashContainerIterator;
+}(ContainerIterator);
+
+export { HashContainerIterator };
+
+var HashContainer = function(t) {
+    __extends(HashContainer, t);
+    function HashContainer() {
+        var i = t.call(this) || this;
+        i._ = [];
+        i.I = {};
+        i.HASH_TAG = Symbol("@@HASH_TAG");
+        Object.setPrototypeOf(i.I, null);
+        i.h = {};
+        i.h.L = i.h.m = i.H = i.l = i.h;
+        return i;
+    }
+    HashContainer.prototype.G = function(t) {
+        var i = t.L, r = t.m;
+        i.m = r;
+        r.L = i;
+        if (t === this.H) {
+            this.H = r;
+        }
+        if (t === this.l) {
+            this.l = i;
+        }
+        this.M -= 1;
+    };
+    HashContainer.prototype.v = function(t, i, r) {
+        if (r === undefined) r = checkObject(t);
+        var e;
+        if (r) {
+            var n = t[this.HASH_TAG];
+            if (n !== undefined) {
+                this._[n].p = i;
+                return this.M;
+            }
+            Object.defineProperty(t, this.HASH_TAG, {
+                value: this._.length,
+                configurable: true
+            });
+            e = {
+                u: t,
+                p: i,
+                L: this.l,
+                m: this.h
+            };
+            this._.push(e);
+        } else {
+            var s = this.I[t];
+            if (s) {
+                s.p = i;
+                return this.M;
+            }
+            e = {
+                u: t,
+                p: i,
+                L: this.l,
+                m: this.h
+            };
+            this.I[t] = e;
+        }
+        if (this.M === 0) {
+            this.H = e;
+            this.h.m = e;
+        } else {
+            this.l.m = e;
+        }
+        this.l = e;
+        this.h.L = e;
+        return ++this.M;
+    };
+    HashContainer.prototype.g = function(t, i) {
+        if (i === undefined) i = checkObject(t);
+        if (i) {
+            var r = t[this.HASH_TAG];
+            if (r === undefined) return this.h;
+            return this._[r];
+        } else {
+            return this.I[t] || this.h;
+        }
+    };
+    HashContainer.prototype.clear = function() {
+        var t = this.HASH_TAG;
+        this._.forEach((function(i) {
+            delete i.u[t];
+        }));
+        this._ = [];
+        this.I = {};
+        Object.setPrototypeOf(this.I, null);
+        this.M = 0;
+        this.H = this.l = this.h.L = this.h.m = this.h;
+    };
+    HashContainer.prototype.eraseElementByKey = function(t, i) {
+        var r;
+        if (i === undefined) i = checkObject(t);
+        if (i) {
+            var e = t[this.HASH_TAG];
+            if (e === undefined) return false;
+            delete t[this.HASH_TAG];
+            r = this._[e];
+            delete this._[e];
+        } else {
+            r = this.I[t];
+            if (r === undefined) return false;
+            delete this.I[t];
+        }
+        this.G(r);
+        return true;
+    };
+    HashContainer.prototype.eraseElementByIterator = function(t) {
+        var i = t.o;
+        if (i === this.h) {
+            throwIteratorAccessError();
+        }
+        this.G(i);
+        return t.next();
+    };
+    HashContainer.prototype.eraseElementByPos = function(t) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        var i = this.H;
+        while (t--) {
+            i = i.m;
+        }
+        this.G(i);
+        return this.M;
+    };
+    return HashContainer;
+}(Container);
+
+export { HashContainer };
+//# sourceMappingURL=index.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/Base/index.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/Base/index.js.map
new file mode 100644
index 0000000..bd0a10d
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/Base/index.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/HashContainer/Base/index.js","../../src/container/HashContainer/Base/index.ts"],"names":["__extends","this","extendStatics","d","b","Object","setPrototypeOf","__proto__","Array","p","prototype","hasOwnProperty","call","TypeError","String","__","constructor","create","Container","ContainerIterator","checkObject","throwIteratorAccessError","HashContainerIterator","_super","node","header","iteratorType","_this","_node","_header","pre","_pre","next","_next","HashContainer","_objMap","_originMap","HASH_TAG","Symbol","_head","_tail","_eraseNode","_length","_set","key","value","isObject","undefined","newTail","index","_value","defineProperty","length","configurable","_key","push","_findElementNode","clear","forEach","el","eraseElementByKey","eraseElementByIterator","iter","eraseElementByPos","pos","RangeError"],"mappings":"AAAA,IAAIA,YAAaC,QAAQA,KAAKD,KAAe;IACzC,IAAIE,gBAAgB,SAAUC,GAAGC;QAC7BF,gBAAgBG,OAAOC,kBAClB;YAAEC,WAAW;qBAAgBC,SAAS,SAAUL,GAAGC;YAAKD,EAAEI,YAAYH;AAAG,aAC1E,SAAUD,GAAGC;YAAK,KAAK,IAAIK,KAAKL,GAAG,IAAIC,OAAOK,UAAUC,eAAeC,KAAKR,GAAGK,IAAIN,EAAEM,KAAKL,EAAEK;AAAI;QACpG,OAAOP,cAAcC,GAAGC;AAC5B;IACA,OAAO,SAAUD,GAAGC;QAChB,WAAWA,MAAM,cAAcA,MAAM,MACjC,MAAM,IAAIS,UAAU,yBAAyBC,OAAOV,KAAK;QAC7DF,cAAcC,GAAGC;QACjB,SAASW;YAAOd,KAAKe,cAAcb;AAAG;QACtCA,EAAEO,YAAYN,MAAM,OAAOC,OAAOY,OAAOb,MAAMW,GAAGL,YAAYN,EAAEM,WAAW,IAAIK;AACnF;AACJ,CAd6C;;SCApCG,WAAWC,yBAAiC;;OAC9CC,iBAAW;;SAETC,gCAA0B;;AASnC,IAAAC,wBAAA,SAAAC;IAA0DvB,UAAAsB,uBAAAC;IAaxD,SAAAD,sBACEE,GACAC,GACAC;QAHF,IAAAC,IAKEJ,EAAAX,KAAAX,MAAMyB,MAAazB;QACnB0B,EAAKC,IAAQJ;QACbG,EAAKE,IAAUJ;QACf,IAAIE,EAAKD,iBAAY,GAA0B;YAC7CC,EAAKG,MAAM;gBACT,IAAI7B,KAAK2B,EAAMG,MAAS9B,KAAK4B,GAAS;oBACpCR;ADJM;gBCMRpB,KAAK2B,IAAQ3B,KAAK2B,EAAMG;gBACxB,OAAO9B;ADJH;YCMN0B,EAAKK,OAAO;gBACV,IAAI/B,KAAK2B,MAAU3B,KAAK4B,GAAS;oBAC/BR;ADJM;gBCMRpB,KAAK2B,IAAQ3B,KAAK2B,EAAMK;gBACxB,OAAOhC;ADJH;AACJ,eCKG;YACL0B,EAAKG,MAAM;gBACT,IAAI7B,KAAK2B,EAAMK,MAAUhC,KAAK4B,GAAS;oBACrCR;ADHM;gBCKRpB,KAAK2B,IAAQ3B,KAAK2B,EAAMK;gBACxB,OAAOhC;ADHH;YCKN0B,EAAKK,OAAO;gBACV,IAAI/B,KAAK2B,MAAU3B,KAAK4B,GAAS;oBAC/BR;ADHM;gBCKRpB,KAAK2B,IAAQ3B,KAAK2B,EAAMG;gBACxB,OAAO9B;ADHH;AACJ;QACA,OAAO0B;AACX;ICQJ,OAAAL;AAAA,CAzDA,CAA0DH;;SDoDjDG;;ACOT,IAAAY,gBAAA,SAAAX;IAAkDvB,UAAAkC,eAAAX;IA4BhD,SAAAW;QAAA,IAAAP,IACEJ,EAAAX,KAAAX,SAAOA;QAzBC0B,EAAAQ,IAAgC;QAIhCR,EAAAS,IAAiD,CAAA;QAgBlDT,EAAAU,WAAWC,OAAO;QAMzBjC,OAAOC,eAAeqB,EAAKS,GAAY;QACvCT,EAAKE,IAA8B,CAAA;QACnCF,EAAKE,EAAQE,IAAOJ,EAAKE,EAAQI,IAAQN,EAAKY,IAAQZ,EAAKa,IAAQb,EAAKE;QDhBpE,OAAOF;AACX;ICoBQO,cAAAxB,UAAA+B,IAAV,SAAqBjB;QACX,IAAAO,IAAgBP,EAAIO,GAAdE,IAAUT,EAAIS;QAC5BF,EAAKE,IAAQA;QACbA,EAAMF,IAAOA;QACb,IAAIP,MAASvB,KAAKsC,GAAO;YACvBtC,KAAKsC,IAAQN;ADfX;QCiBJ,IAAIT,MAASvB,KAAKuC,GAAO;YACvBvC,KAAKuC,IAAQT;ADfX;QCiBJ9B,KAAKyC,KAAW;ADfhB;ICoBQR,cAAAxB,UAAAiC,IAAV,SAAeC,GAAQC,GAAWC;QAChC,IAAIA,MAAaC,WAAWD,IAAW1B,YAAYwB;QACnD,IAAII;QACJ,IAAIF,GAAU;YACZ,IAAMG,IAA0CL,EAAK3C,KAAKoC;YAC1D,IAAIY,MAAUF,WAAW;gBACvB9C,KAAKkC,EAAgBc,GAAOC,IAAYL;gBACxC,OAAO5C,KAAKyC;ADdR;YCgBNrC,OAAO8C,eAAeP,GAAK3C,KAAKoC,UAAU;gBACxCQ,OAAO5C,KAAKkC,EAAQiB;gBACpBC,cAAc;;YAEhBL,IAAU;gBACRM,GAAMV;gBACNM,GAAWL;gBACXd,GAAM9B,KAAKuC;gBACXP,GAAOhC,KAAK4B;;YAEd5B,KAAKkC,EAAQoB,KAAKP;ADdhB,eCeG;YACL,IAAMxB,IAAOvB,KAAKmC,EAA4BQ;YAC9C,IAAIpB,GAAM;gBACRA,EAAK0B,IAAYL;gBACjB,OAAO5C,KAAKyC;ADbR;YCeNM,IAAU;gBACRM,GAAMV;gBACNM,GAAWL;gBACXd,GAAM9B,KAAKuC;gBACXP,GAAOhC,KAAK4B;;YAEd5B,KAAKmC,EAA4BQ,KAAOI;ADbtC;QCeJ,IAAI/C,KAAKyC,MAAY,GAAG;YACtBzC,KAAKsC,IAAQS;YACb/C,KAAK4B,EAAQI,IAAQe;ADbnB,eCcG;YACL/C,KAAKuC,EAAMP,IAAQe;ADZjB;QCcJ/C,KAAKuC,IAAQQ;QACb/C,KAAK4B,EAAQE,IAAOiB;QACpB,SAAS/C,KAAKyC;ADZd;ICiBQR,cAAAxB,UAAA8C,IAAV,SAA2BZ,GAAQE;QACjC,IAAIA,MAAaC,WAAWD,IAAW1B,YAAYwB;QACnD,IAAIE,GAAU;YACZ,IAAMG,IAA0CL,EAAK3C,KAAKoC;YAC1D,IAAIY,MAAUF,WAAW,OAAO9C,KAAK4B;YACrC,OAAO5B,KAAKkC,EAAQc;ADVlB,eCWG;YACL,OAAOhD,KAAKmC,EAA4BQ,MAAQ3C,KAAK4B;ADTnD;AACJ;ICWFK,cAAAxB,UAAA+C,QAAA;QACE,IAAMpB,IAAWpC,KAAKoC;QACtBpC,KAAKkC,EAAQuB,SAAQ,SAAUC;mBACYA,EAAGL,EAAMjB;ADThD;QCWJpC,KAAKkC,IAAU;QACflC,KAAKmC,IAAa,CAAA;QAClB/B,OAAOC,eAAeL,KAAKmC,GAAY;QACvCnC,KAAKyC,IAAU;QACfzC,KAAKsC,IAAQtC,KAAKuC,IAAQvC,KAAK4B,EAAQE,IAAO9B,KAAK4B,EAAQI,IAAQhC,KAAK4B;ADTxE;ICkBFK,cAAAxB,UAAAkD,oBAAA,SAAkBhB,GAAQE;QACxB,IAAItB;QACJ,IAAIsB,MAAaC,WAAWD,IAAW1B,YAAYwB;QACnD,IAAIE,GAAU;YACZ,IAAMG,IAA0CL,EAAK3C,KAAKoC;YAC1D,IAAIY,MAAUF,WAAW,OAAO;mBACSH,EAAK3C,KAAKoC;YACnDb,IAAOvB,KAAKkC,EAAQc;mBACbhD,KAAKkC,EAAQc;ADPlB,eCQG;YACLzB,IAAOvB,KAAKmC,EAA4BQ;YACxC,IAAIpB,MAASuB,WAAW,OAAO;mBACxB9C,KAAKmC,EAA4BQ;ADLtC;QCOJ3C,KAAKwC,EAAWjB;QAChB,OAAO;ADLP;ICOFU,cAAAxB,UAAAmD,yBAAA,SAAuBC;QACrB,IAAMtC,IAAOsC,EAAKlC;QAClB,IAAIJ,MAASvB,KAAK4B,GAAS;YACzBR;ADLE;QCOJpB,KAAKwC,EAAWjB;QAChB,OAAOsC,EAAK9B;ADLZ;ICOFE,cAAAxB,UAAAqD,oBAAA,SAAkBC;QDLZ,ICMsBA,IAAG,KAAHA,IAAQ/D,KAAKyC,IAAO,GAvN5C;YAAG,MAAS,IAAIuB;ADmNd;QCKJ,IAAIzC,IAAOvB,KAAKsC;QAChB,OAAOyB,KAAO;YACZxC,IAAOA,EAAKS;ADHV;QCKJhC,KAAKwC,EAAWjB;QAChB,OAAOvB,KAAKyC;ADHZ;ICKJ,OAAAR;AAAA,CAjKA,CAAkDhB;;SD+JzCgB","file":"index.js","sourcesContent":["var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nimport { Container, ContainerIterator } from \"../../ContainerBase\";\nimport checkObject from \"../../../utils/checkObject\";\nimport $checkWithinAccessParams from \"../../../utils/checkParams.macro\";\nimport { throwIteratorAccessError } from \"../../../utils/throwError\";\nvar HashContainerIterator = /** @class */ (function (_super) {\n    __extends(HashContainerIterator, _super);\n    /**\n     * @internal\n     */\n    function HashContainerIterator(node, header, iteratorType) {\n        var _this = _super.call(this, iteratorType) || this;\n        _this._node = node;\n        _this._header = header;\n        if (_this.iteratorType === 0 /* IteratorType.NORMAL */) {\n            _this.pre = function () {\n                if (this._node._pre === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre;\n                return this;\n            };\n            _this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next;\n                return this;\n            };\n        }\n        else {\n            _this.pre = function () {\n                if (this._node._next === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next;\n                return this;\n            };\n            _this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre;\n                return this;\n            };\n        }\n        return _this;\n    }\n    return HashContainerIterator;\n}(ContainerIterator));\nexport { HashContainerIterator };\nvar HashContainer = /** @class */ (function (_super) {\n    __extends(HashContainer, _super);\n    /**\n     * @internal\n     */\n    function HashContainer() {\n        var _this = _super.call(this) || this;\n        /**\n         * @internal\n         */\n        _this._objMap = [];\n        /**\n         * @internal\n         */\n        _this._originMap = {};\n        /**\n         * @description Unique symbol used to tag object.\n         */\n        _this.HASH_TAG = Symbol('@@HASH_TAG');\n        Object.setPrototypeOf(_this._originMap, null);\n        _this._header = {};\n        _this._header._pre = _this._header._next = _this._head = _this._tail = _this._header;\n        return _this;\n    }\n    /**\n     * @internal\n     */\n    HashContainer.prototype._eraseNode = function (node) {\n        var _pre = node._pre, _next = node._next;\n        _pre._next = _next;\n        _next._pre = _pre;\n        if (node === this._head) {\n            this._head = _next;\n        }\n        if (node === this._tail) {\n            this._tail = _pre;\n        }\n        this._length -= 1;\n    };\n    /**\n     * @internal\n     */\n    HashContainer.prototype._set = function (key, value, isObject) {\n        if (isObject === undefined)\n            isObject = checkObject(key);\n        var newTail;\n        if (isObject) {\n            var index = key[this.HASH_TAG];\n            if (index !== undefined) {\n                this._objMap[index]._value = value;\n                return this._length;\n            }\n            Object.defineProperty(key, this.HASH_TAG, {\n                value: this._objMap.length,\n                configurable: true\n            });\n            newTail = {\n                _key: key,\n                _value: value,\n                _pre: this._tail,\n                _next: this._header\n            };\n            this._objMap.push(newTail);\n        }\n        else {\n            var node = this._originMap[key];\n            if (node) {\n                node._value = value;\n                return this._length;\n            }\n            newTail = {\n                _key: key,\n                _value: value,\n                _pre: this._tail,\n                _next: this._header\n            };\n            this._originMap[key] = newTail;\n        }\n        if (this._length === 0) {\n            this._head = newTail;\n            this._header._next = newTail;\n        }\n        else {\n            this._tail._next = newTail;\n        }\n        this._tail = newTail;\n        this._header._pre = newTail;\n        return ++this._length;\n    };\n    /**\n     * @internal\n     */\n    HashContainer.prototype._findElementNode = function (key, isObject) {\n        if (isObject === undefined)\n            isObject = checkObject(key);\n        if (isObject) {\n            var index = key[this.HASH_TAG];\n            if (index === undefined)\n                return this._header;\n            return this._objMap[index];\n        }\n        else {\n            return this._originMap[key] || this._header;\n        }\n    };\n    HashContainer.prototype.clear = function () {\n        var HASH_TAG = this.HASH_TAG;\n        this._objMap.forEach(function (el) {\n            delete el._key[HASH_TAG];\n        });\n        this._objMap = [];\n        this._originMap = {};\n        Object.setPrototypeOf(this._originMap, null);\n        this._length = 0;\n        this._head = this._tail = this._header._pre = this._header._next = this._header;\n    };\n    /**\n     * @description Remove the element of the specified key.\n     * @param key - The key you want to remove.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @returns Whether erase successfully.\n     */\n    HashContainer.prototype.eraseElementByKey = function (key, isObject) {\n        var node;\n        if (isObject === undefined)\n            isObject = checkObject(key);\n        if (isObject) {\n            var index = key[this.HASH_TAG];\n            if (index === undefined)\n                return false;\n            delete key[this.HASH_TAG];\n            node = this._objMap[index];\n            delete this._objMap[index];\n        }\n        else {\n            node = this._originMap[key];\n            if (node === undefined)\n                return false;\n            delete this._originMap[key];\n        }\n        this._eraseNode(node);\n        return true;\n    };\n    HashContainer.prototype.eraseElementByIterator = function (iter) {\n        var node = iter._node;\n        if (node === this._header) {\n            throwIteratorAccessError();\n        }\n        this._eraseNode(node);\n        return iter.next();\n    };\n    HashContainer.prototype.eraseElementByPos = function (pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        var node = this._head;\n        while (pos--) {\n            node = node._next;\n        }\n        this._eraseNode(node);\n        return this._length;\n    };\n    return HashContainer;\n}(Container));\nexport { HashContainer };\n","import { Container, ContainerIterator, IteratorType } from '@/container/ContainerBase';\nimport checkObject from '@/utils/checkObject';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nexport type HashLinkNode<K, V> = {\n  _key: K,\n  _value: V,\n  _pre: HashLinkNode<K, V>,\n  _next: HashLinkNode<K, V>\n}\n\nexport abstract class HashContainerIterator<K, V> extends ContainerIterator<K | [K, V]> {\n  abstract readonly container: HashContainer<K, V>;\n  /**\n   * @internal\n   */\n  _node: HashLinkNode<K, V>;\n  /**\n   * @internal\n   */\n  protected readonly _header: HashLinkNode<K, V>;\n  /**\n   * @internal\n   */\n  protected constructor(\n    node: HashLinkNode<K, V>,\n    header: HashLinkNode<K, V>,\n    iteratorType?: IteratorType\n  ) {\n    super(iteratorType);\n    this._node = node;\n    this._header = header;\n    if (this.iteratorType === IteratorType.NORMAL) {\n      this.pre = function () {\n        if (this._node._pre === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next;\n        return this;\n      };\n    } else {\n      this.pre = function () {\n        if (this._node._next === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre;\n        return this;\n      };\n    }\n  }\n  // @ts-ignore\n  pre(): this;\n  // @ts-ignore\n  next(): this;\n}\n\nexport abstract class HashContainer<K, V> extends Container<K | [K, V]> {\n  /**\n   * @internal\n   */\n  protected _objMap: HashLinkNode<K, V>[] = [];\n  /**\n   * @internal\n   */\n  protected _originMap: Record<string, HashLinkNode<K, V>> = {};\n  /**\n   * @internal\n   */\n  protected _head: HashLinkNode<K, V>;\n  /**\n   * @internal\n   */\n  protected _tail: HashLinkNode<K, V>;\n  /**\n   * @internal\n   */\n  protected readonly _header: HashLinkNode<K, V>;\n  /**\n   * @description Unique symbol used to tag object.\n   */\n  readonly HASH_TAG = Symbol('@@HASH_TAG');\n  /**\n   * @internal\n   */\n  protected constructor() {\n    super();\n    Object.setPrototypeOf(this._originMap, null);\n    this._header = <HashLinkNode<K, V>>{};\n    this._header._pre = this._header._next = this._head = this._tail = this._header;\n  }\n  /**\n   * @internal\n   */\n  protected _eraseNode(node: HashLinkNode<K, V>) {\n    const { _pre, _next } = node;\n    _pre._next = _next;\n    _next._pre = _pre;\n    if (node === this._head) {\n      this._head = _next;\n    }\n    if (node === this._tail) {\n      this._tail = _pre;\n    }\n    this._length -= 1;\n  }\n  /**\n   * @internal\n   */\n  protected _set(key: K, value?: V, isObject?: boolean) {\n    if (isObject === undefined) isObject = checkObject(key);\n    let newTail;\n    if (isObject) {\n      const index = (<Record<symbol, number>><unknown>key)[this.HASH_TAG];\n      if (index !== undefined) {\n        this._objMap[<number>index]._value = <V>value;\n        return this._length;\n      }\n      Object.defineProperty(key, this.HASH_TAG, {\n        value: this._objMap.length,\n        configurable: true\n      });\n      newTail = {\n        _key: key,\n        _value: <V>value,\n        _pre: this._tail,\n        _next: this._header\n      };\n      this._objMap.push(newTail);\n    } else {\n      const node = this._originMap[<string><unknown>key];\n      if (node) {\n        node._value = <V>value;\n        return this._length;\n      }\n      newTail = {\n        _key: key,\n        _value: <V>value,\n        _pre: this._tail,\n        _next: this._header\n      };\n      this._originMap[<string><unknown>key] = newTail;\n    }\n    if (this._length === 0) {\n      this._head = newTail;\n      this._header._next = newTail;\n    } else {\n      this._tail._next = newTail;\n    }\n    this._tail = newTail;\n    this._header._pre = newTail;\n    return ++this._length;\n  }\n  /**\n   * @internal\n   */\n  protected _findElementNode(key: K, isObject?: boolean) {\n    if (isObject === undefined) isObject = checkObject(key);\n    if (isObject) {\n      const index = (<Record<symbol, number>><unknown>key)[this.HASH_TAG];\n      if (index === undefined) return this._header;\n      return this._objMap[index];\n    } else {\n      return this._originMap[<string><unknown>key] || this._header;\n    }\n  }\n  clear() {\n    const HASH_TAG = this.HASH_TAG;\n    this._objMap.forEach(function (el) {\n      delete (<Record<symbol, number>><unknown>el._key)[HASH_TAG];\n    });\n    this._objMap = [];\n    this._originMap = {};\n    Object.setPrototypeOf(this._originMap, null);\n    this._length = 0;\n    this._head = this._tail = this._header._pre = this._header._next = this._header;\n  }\n  /**\n   * @description Remove the element of the specified key.\n   * @param key - The key you want to remove.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @returns Whether erase successfully.\n   */\n  eraseElementByKey(key: K, isObject?: boolean) {\n    let node;\n    if (isObject === undefined) isObject = checkObject(key);\n    if (isObject) {\n      const index = (<Record<symbol, number>><unknown>key)[this.HASH_TAG];\n      if (index === undefined) return false;\n      delete (<Record<symbol, number>><unknown>key)[this.HASH_TAG];\n      node = this._objMap[index];\n      delete this._objMap[index];\n    } else {\n      node = this._originMap[<string><unknown>key];\n      if (node === undefined) return false;\n      delete this._originMap[<string><unknown>key];\n    }\n    this._eraseNode(node);\n    return true;\n  }\n  eraseElementByIterator(iter: HashContainerIterator<K, V>) {\n    const node = iter._node;\n    if (node === this._header) {\n      throwIteratorAccessError();\n    }\n    this._eraseNode(node);\n    return iter.next();\n  }\n  eraseElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let node = this._head;\n    while (pos--) {\n      node = node._next;\n    }\n    this._eraseNode(node);\n    return this._length;\n  }\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashMap.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashMap.d.ts
new file mode 100644
index 0000000..1b78025
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashMap.d.ts
@@ -0,0 +1,49 @@
+import { initContainer, IteratorType } from "../ContainerBase";
+import { HashContainer, HashContainerIterator, HashLinkNode } from "./Base";
+declare class HashMapIterator<K, V> extends HashContainerIterator<K, V> {
+    readonly container: HashMap<K, V>;
+    constructor(node: HashLinkNode<K, V>, header: HashLinkNode<K, V>, container: HashMap<K, V>, iteratorType?: IteratorType);
+    get pointer(): [K, V];
+    copy(): HashMapIterator<K, V>;
+    equals(iter: HashMapIterator<K, V>): boolean;
+}
+export type { HashMapIterator };
+declare class HashMap<K, V> extends HashContainer<K, V> {
+    constructor(container?: initContainer<[K, V]>);
+    begin(): HashMapIterator<K, V>;
+    end(): HashMapIterator<K, V>;
+    rBegin(): HashMapIterator<K, V>;
+    rEnd(): HashMapIterator<K, V>;
+    front(): [K, V] | undefined;
+    back(): [K, V] | undefined;
+    /**
+     * @description Insert a key-value pair or set value by the given key.
+     * @param key - The key want to insert.
+     * @param value - The value want to set.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @returns The size of container after setting.
+     */
+    setElement(key: K, value: V, isObject?: boolean): number;
+    /**
+     * @description Get the value of the element of the specified key.
+     * @param key - The key want to search.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @example
+     * const val = container.getElementByKey(1);
+     */
+    getElementByKey(key: K, isObject?: boolean): V | undefined;
+    getElementByPos(pos: number): [K, V];
+    /**
+     * @description Check key if exist in container.
+     * @param key - The element you want to search.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @returns An iterator pointing to the element if found, or super end if not found.
+     */
+    find(key: K, isObject?: boolean): HashMapIterator<K, V>;
+    forEach(callback: (element: [K, V], index: number, hashMap: HashMap<K, V>) => void): void;
+    [Symbol.iterator](): Generator<[K, V], void, unknown>;
+}
+export default HashMap;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashMap.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashMap.js
new file mode 100644
index 0000000..af08bfb
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashMap.js
@@ -0,0 +1,248 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(t, r) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(t, r) {
+            t.__proto__ = r;
+        } || function(t, r) {
+            for (var n in r) if (Object.prototype.hasOwnProperty.call(r, n)) t[n] = r[n];
+        };
+        return extendStatics(t, r);
+    };
+    return function(t, r) {
+        if (typeof r !== "function" && r !== null) throw new TypeError("Class extends value " + String(r) + " is not a constructor or null");
+        extendStatics(t, r);
+        function __() {
+            this.constructor = t;
+        }
+        t.prototype = r === null ? Object.create(r) : (__.prototype = r.prototype, new __);
+    };
+}();
+
+var __generator = this && this.i || function(t, r) {
+    var n = {
+        label: 0,
+        sent: function() {
+            if (a[0] & 1) throw a[1];
+            return a[1];
+        },
+        trys: [],
+        ops: []
+    }, e, i, a, s;
+    return s = {
+        next: verb(0),
+        throw: verb(1),
+        return: verb(2)
+    }, typeof Symbol === "function" && (s[Symbol.iterator] = function() {
+        return this;
+    }), s;
+    function verb(t) {
+        return function(r) {
+            return step([ t, r ]);
+        };
+    }
+    function step(s) {
+        if (e) throw new TypeError("Generator is already executing.");
+        while (n) try {
+            if (e = 1, i && (a = s[0] & 2 ? i["return"] : s[0] ? i["throw"] || ((a = i["return"]) && a.call(i), 
+            0) : i.next) && !(a = a.call(i, s[1])).done) return a;
+            if (i = 0, a) s = [ s[0] & 2, a.value ];
+            switch (s[0]) {
+              case 0:
+              case 1:
+                a = s;
+                break;
+
+              case 4:
+                n.label++;
+                return {
+                    value: s[1],
+                    done: false
+                };
+
+              case 5:
+                n.label++;
+                i = s[1];
+                s = [ 0 ];
+                continue;
+
+              case 7:
+                s = n.ops.pop();
+                n.trys.pop();
+                continue;
+
+              default:
+                if (!(a = n.trys, a = a.length > 0 && a[a.length - 1]) && (s[0] === 6 || s[0] === 2)) {
+                    n = 0;
+                    continue;
+                }
+                if (s[0] === 3 && (!a || s[1] > a[0] && s[1] < a[3])) {
+                    n.label = s[1];
+                    break;
+                }
+                if (s[0] === 6 && n.label < a[1]) {
+                    n.label = a[1];
+                    a = s;
+                    break;
+                }
+                if (a && n.label < a[2]) {
+                    n.label = a[2];
+                    n.ops.push(s);
+                    break;
+                }
+                if (a[2]) n.ops.pop();
+                n.trys.pop();
+                continue;
+            }
+            s = r.call(t, n);
+        } catch (t) {
+            s = [ 6, t ];
+            i = 0;
+        } finally {
+            e = a = 0;
+        }
+        if (s[0] & 5) throw s[1];
+        return {
+            value: s[0] ? s[1] : void 0,
+            done: true
+        };
+    }
+};
+
+import { HashContainer, HashContainerIterator } from "./Base";
+
+import checkObject from "../../utils/checkObject";
+
+import { throwIteratorAccessError } from "../../utils/throwError";
+
+var HashMapIterator = function(t) {
+    __extends(HashMapIterator, t);
+    function HashMapIterator(r, n, e, i) {
+        var a = t.call(this, r, n, i) || this;
+        a.container = e;
+        return a;
+    }
+    Object.defineProperty(HashMapIterator.prototype, "pointer", {
+        get: function() {
+            if (this.o === this.h) {
+                throwIteratorAccessError();
+            }
+            var t = this;
+            return new Proxy([], {
+                get: function(r, n) {
+                    if (n === "0") return t.o.u; else if (n === "1") return t.o.p;
+                },
+                set: function(r, n, e) {
+                    if (n !== "1") {
+                        throw new TypeError("props must be 1");
+                    }
+                    t.o.p = e;
+                    return true;
+                }
+            });
+        },
+        enumerable: false,
+        configurable: true
+    });
+    HashMapIterator.prototype.copy = function() {
+        return new HashMapIterator(this.o, this.h, this.container, this.iteratorType);
+    };
+    return HashMapIterator;
+}(HashContainerIterator);
+
+var HashMap = function(t) {
+    __extends(HashMap, t);
+    function HashMap(r) {
+        if (r === void 0) {
+            r = [];
+        }
+        var n = t.call(this) || this;
+        var e = n;
+        r.forEach((function(t) {
+            e.setElement(t[0], t[1]);
+        }));
+        return n;
+    }
+    HashMap.prototype.begin = function() {
+        return new HashMapIterator(this.H, this.h, this);
+    };
+    HashMap.prototype.end = function() {
+        return new HashMapIterator(this.h, this.h, this);
+    };
+    HashMap.prototype.rBegin = function() {
+        return new HashMapIterator(this.l, this.h, this, 1);
+    };
+    HashMap.prototype.rEnd = function() {
+        return new HashMapIterator(this.h, this.h, this, 1);
+    };
+    HashMap.prototype.front = function() {
+        if (this.M === 0) return;
+        return [ this.H.u, this.H.p ];
+    };
+    HashMap.prototype.back = function() {
+        if (this.M === 0) return;
+        return [ this.l.u, this.l.p ];
+    };
+    HashMap.prototype.setElement = function(t, r, n) {
+        return this.v(t, r, n);
+    };
+    HashMap.prototype.getElementByKey = function(t, r) {
+        if (r === undefined) r = checkObject(t);
+        if (r) {
+            var n = t[this.HASH_TAG];
+            return n !== undefined ? this._[n].p : undefined;
+        }
+        var e = this.I[t];
+        return e ? e.p : undefined;
+    };
+    HashMap.prototype.getElementByPos = function(t) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        var r = this.H;
+        while (t--) {
+            r = r.m;
+        }
+        return [ r.u, r.p ];
+    };
+    HashMap.prototype.find = function(t, r) {
+        var n = this.g(t, r);
+        return new HashMapIterator(n, this.h, this);
+    };
+    HashMap.prototype.forEach = function(t) {
+        var r = 0;
+        var n = this.H;
+        while (n !== this.h) {
+            t([ n.u, n.p ], r++, this);
+            n = n.m;
+        }
+    };
+    HashMap.prototype[Symbol.iterator] = function() {
+        return function() {
+            var t;
+            return __generator(this, (function(r) {
+                switch (r.label) {
+                  case 0:
+                    t = this.H;
+                    r.label = 1;
+
+                  case 1:
+                    if (!(t !== this.h)) return [ 3, 3 ];
+                    return [ 4, [ t.u, t.p ] ];
+
+                  case 2:
+                    r.sent();
+                    t = t.m;
+                    return [ 3, 1 ];
+
+                  case 3:
+                    return [ 2 ];
+                }
+            }));
+        }.bind(this)();
+    };
+    return HashMap;
+}(HashContainer);
+
+export default HashMap;
+//# sourceMappingURL=HashMap.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashMap.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashMap.js.map
new file mode 100644
index 0000000..a058500
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashMap.js.map
@@ -0,0 +1 @@
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The key want to insert.\n     * @param value - The value want to set.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @returns The size of container after setting.\n     */\n    HashMap.prototype.setElement = function (key, value, isObject) {\n        return this._set(key, value, isObject);\n    };\n    /**\n     * @description Get the value of the element of the specified key.\n     * @param key - The key want to search.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @example\n     * const val = container.getElementByKey(1);\n     */\n    HashMap.prototype.getElementByKey = function (key, isObject) {\n        if (isObject === undefined)\n            isObject = checkObject(key);\n        if (isObject) {\n            var index = key[this.HASH_TAG];\n            return index !== undefined ? this._objMap[index]._value : undefined;\n        }\n        var node = this._originMap[key];\n        return node ? node._value : undefined;\n    };\n    HashMap.prototype.getElementByPos = function (pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        var node = this._head;\n        while (pos--) {\n            node = node._next;\n        }\n        return [node._key, node._value];\n    };\n    /**\n     * @description Check key if exist in container.\n     * @param key - The element you want to search.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @returns An iterator pointing to the element if found, or super end if not found.\n     */\n    HashMap.prototype.find = function (key, isObject) {\n        var node = this._findElementNode(key, isObject);\n        return new HashMapIterator(node, this._header, this);\n    };\n    HashMap.prototype.forEach = function (callback) {\n        var index = 0;\n        var node = this._head;\n        while (node !== this._header) {\n            callback([node._key, node._value], index++, this);\n            node = node._next;\n        }\n    };\n    HashMap.prototype[Symbol.iterator] = function () {\n        return function () {\n            var node;\n            return __generator(this, function (_a) {\n                switch (_a.label) {\n                    case 0:\n                        node = this._head;\n                        _a.label = 1;\n                    case 1:\n                        if (!(node !== this._header)) return [3 /*break*/, 3];\n                        return [4 /*yield*/, [node._key, node._value]];\n                    case 2:\n                        _a.sent();\n                        node = node._next;\n                        return [3 /*break*/, 1];\n                    case 3: return [2 /*return*/];\n                }\n            });\n        }.bind(this)();\n    };\n    return HashMap;\n}(HashContainer));\nexport default HashMap;\n","import { initContainer, IteratorType } from '@/container/ContainerBase';\nimport { HashContainer, HashContainerIterator, HashLinkNode } from '@/container/HashContainer/Base';\nimport checkObject from '@/utils/checkObject';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nclass HashMapIterator<K, V> extends HashContainerIterator<K, V> {\n  readonly container: HashMap<K, V>;\n  constructor(\n    node: HashLinkNode<K, V>,\n    header: HashLinkNode<K, V>,\n    container: HashMap<K, V>,\n    iteratorType?: IteratorType\n  ) {\n    super(node, header, iteratorType);\n    this.container = container;\n  }\n  get pointer() {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    const self = this;\n    return new Proxy(<[K, V]><unknown>[], {\n      get(_, props: '0' | '1') {\n        if (props === '0') return self._node._key;\n        else if (props === '1') return self._node._value;\n      },\n      set(_, props: '1', newValue: V) {\n        if (props !== '1') {\n          throw new TypeError('props must be 1');\n        }\n        self._node._value = newValue;\n        return true;\n      }\n    });\n  }\n  copy() {\n    return new HashMapIterator<K, V>(this._node, this._header, this.container, this.iteratorType);\n  }\n  // @ts-ignore\n  equals(iter: HashMapIterator<K, V>): boolean;\n}\n\nexport type { HashMapIterator };\n\nclass HashMap<K, V> extends HashContainer<K, V> {\n  constructor(container: initContainer<[K, V]> = []) {\n    super();\n    const self = this;\n    container.forEach(function (el) {\n      self.setElement(el[0], el[1]);\n    });\n  }\n  begin() {\n    return new HashMapIterator<K, V>(this._head, this._header, this);\n  }\n  end() {\n    return new HashMapIterator<K, V>(this._header, this._header, this);\n  }\n  rBegin() {\n    return new HashMapIterator<K, V>(this._tail, this._header, this, IteratorType.REVERSE);\n  }\n  rEnd() {\n    return new HashMapIterator<K, V>(this._header, this._header, this, IteratorType.REVERSE);\n  }\n  front() {\n    if (this._length === 0) return;\n    return <[K, V]>[this._head._key, this._head._value];\n  }\n  back() {\n    if (this._length === 0) return;\n    return <[K, V]>[this._tail._key, this._tail._value];\n  }\n  /**\n   * @description Insert a key-value pair or set value by the given key.\n   * @param key - The key want to insert.\n   * @param value - The value want to set.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @returns The size of container after setting.\n   */\n  setElement(key: K, value: V, isObject?: boolean) {\n    return this._set(key, value, isObject);\n  }\n  /**\n   * @description Get the value of the element of the specified key.\n   * @param key - The key want to search.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @example\n   * const val = container.getElementByKey(1);\n   */\n  getElementByKey(key: K, isObject?: boolean) {\n    if (isObject === undefined) isObject = checkObject(key);\n    if (isObject) {\n      const index = (<Record<symbol, number>><unknown>key)[this.HASH_TAG];\n      return index !== undefined ? this._objMap[index]._value : undefined;\n    }\n    const node = this._originMap[<string><unknown>key];\n    return node ? node._value : undefined;\n  }\n  getElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let node = this._head;\n    while (pos--) {\n      node = node._next;\n    }\n    return <[K, V]>[node._key, node._value];\n  }\n  /**\n   * @description Check key if exist in container.\n   * @param key - The element you want to search.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @returns An iterator pointing to the element if found, or super end if not found.\n   */\n  find(key: K, isObject?: boolean) {\n    const node = this._findElementNode(key, isObject);\n    return new HashMapIterator<K, V>(node, this._header, this);\n  }\n  forEach(callback: (element: [K, V], index: number, hashMap: HashMap<K, V>) => void) {\n    let index = 0;\n    let node = this._head;\n    while (node !== this._header) {\n      callback(<[K, V]>[node._key, node._value], index++, this);\n      node = node._next;\n    }\n  }\n  [Symbol.iterator]() {\n    return function * (this: HashMap<K, V>) {\n      let node = this._head;\n      while (node !== this._header) {\n        yield <[K, V]>[node._key, node._value];\n        node = node._next;\n      }\n    }.bind(this)();\n  }\n}\n\nexport default HashMap;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashSet.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashSet.d.ts
new file mode 100644
index 0000000..345fe5a
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashSet.d.ts
@@ -0,0 +1,39 @@
+import { initContainer, IteratorType } from "../ContainerBase";
+import { HashContainer, HashContainerIterator, HashLinkNode } from "./Base";
+declare class HashSetIterator<K> extends HashContainerIterator<K, undefined> {
+    readonly container: HashSet<K>;
+    constructor(node: HashLinkNode<K, undefined>, header: HashLinkNode<K, undefined>, container: HashSet<K>, iteratorType?: IteratorType);
+    get pointer(): K;
+    copy(): HashSetIterator<K>;
+    equals(iter: HashSetIterator<K>): boolean;
+}
+export type { HashSetIterator };
+declare class HashSet<K> extends HashContainer<K, undefined> {
+    constructor(container?: initContainer<K>);
+    begin(): HashSetIterator<K>;
+    end(): HashSetIterator<K>;
+    rBegin(): HashSetIterator<K>;
+    rEnd(): HashSetIterator<K>;
+    front(): K | undefined;
+    back(): K | undefined;
+    /**
+     * @description Insert element to set.
+     * @param key - The key want to insert.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @returns The size of container after inserting.
+     */
+    insert(key: K, isObject?: boolean): number;
+    getElementByPos(pos: number): K;
+    /**
+     * @description Check key if exist in container.
+     * @param key - The element you want to search.
+     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+     *                   If a `undefined` value is passed in, the type will be automatically judged.
+     * @returns An iterator pointing to the element if found, or super end if not found.
+     */
+    find(key: K, isObject?: boolean): HashSetIterator<K>;
+    forEach(callback: (element: K, index: number, container: HashSet<K>) => void): void;
+    [Symbol.iterator](): Generator<K, void, unknown>;
+}
+export default HashSet;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashSet.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashSet.js
new file mode 100644
index 0000000..df05658
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashSet.js
@@ -0,0 +1,223 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(t, r) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(t, r) {
+            t.__proto__ = r;
+        } || function(t, r) {
+            for (var e in r) if (Object.prototype.hasOwnProperty.call(r, e)) t[e] = r[e];
+        };
+        return extendStatics(t, r);
+    };
+    return function(t, r) {
+        if (typeof r !== "function" && r !== null) throw new TypeError("Class extends value " + String(r) + " is not a constructor or null");
+        extendStatics(t, r);
+        function __() {
+            this.constructor = t;
+        }
+        t.prototype = r === null ? Object.create(r) : (__.prototype = r.prototype, new __);
+    };
+}();
+
+var __generator = this && this.i || function(t, r) {
+    var e = {
+        label: 0,
+        sent: function() {
+            if (s[0] & 1) throw s[1];
+            return s[1];
+        },
+        trys: [],
+        ops: []
+    }, n, i, s, a;
+    return a = {
+        next: verb(0),
+        throw: verb(1),
+        return: verb(2)
+    }, typeof Symbol === "function" && (a[Symbol.iterator] = function() {
+        return this;
+    }), a;
+    function verb(t) {
+        return function(r) {
+            return step([ t, r ]);
+        };
+    }
+    function step(a) {
+        if (n) throw new TypeError("Generator is already executing.");
+        while (e) try {
+            if (n = 1, i && (s = a[0] & 2 ? i["return"] : a[0] ? i["throw"] || ((s = i["return"]) && s.call(i), 
+            0) : i.next) && !(s = s.call(i, a[1])).done) return s;
+            if (i = 0, s) a = [ a[0] & 2, s.value ];
+            switch (a[0]) {
+              case 0:
+              case 1:
+                s = a;
+                break;
+
+              case 4:
+                e.label++;
+                return {
+                    value: a[1],
+                    done: false
+                };
+
+              case 5:
+                e.label++;
+                i = a[1];
+                a = [ 0 ];
+                continue;
+
+              case 7:
+                a = e.ops.pop();
+                e.trys.pop();
+                continue;
+
+              default:
+                if (!(s = e.trys, s = s.length > 0 && s[s.length - 1]) && (a[0] === 6 || a[0] === 2)) {
+                    e = 0;
+                    continue;
+                }
+                if (a[0] === 3 && (!s || a[1] > s[0] && a[1] < s[3])) {
+                    e.label = a[1];
+                    break;
+                }
+                if (a[0] === 6 && e.label < s[1]) {
+                    e.label = s[1];
+                    s = a;
+                    break;
+                }
+                if (s && e.label < s[2]) {
+                    e.label = s[2];
+                    e.ops.push(a);
+                    break;
+                }
+                if (s[2]) e.ops.pop();
+                e.trys.pop();
+                continue;
+            }
+            a = r.call(t, e);
+        } catch (t) {
+            a = [ 6, t ];
+            i = 0;
+        } finally {
+            n = s = 0;
+        }
+        if (a[0] & 5) throw a[1];
+        return {
+            value: a[0] ? a[1] : void 0,
+            done: true
+        };
+    }
+};
+
+import { HashContainer, HashContainerIterator } from "./Base";
+
+import { throwIteratorAccessError } from "../../utils/throwError";
+
+var HashSetIterator = function(t) {
+    __extends(HashSetIterator, t);
+    function HashSetIterator(r, e, n, i) {
+        var s = t.call(this, r, e, i) || this;
+        s.container = n;
+        return s;
+    }
+    Object.defineProperty(HashSetIterator.prototype, "pointer", {
+        get: function() {
+            if (this.o === this.h) {
+                throwIteratorAccessError();
+            }
+            return this.o.u;
+        },
+        enumerable: false,
+        configurable: true
+    });
+    HashSetIterator.prototype.copy = function() {
+        return new HashSetIterator(this.o, this.h, this.container, this.iteratorType);
+    };
+    return HashSetIterator;
+}(HashContainerIterator);
+
+var HashSet = function(t) {
+    __extends(HashSet, t);
+    function HashSet(r) {
+        if (r === void 0) {
+            r = [];
+        }
+        var e = t.call(this) || this;
+        var n = e;
+        r.forEach((function(t) {
+            n.insert(t);
+        }));
+        return e;
+    }
+    HashSet.prototype.begin = function() {
+        return new HashSetIterator(this.H, this.h, this);
+    };
+    HashSet.prototype.end = function() {
+        return new HashSetIterator(this.h, this.h, this);
+    };
+    HashSet.prototype.rBegin = function() {
+        return new HashSetIterator(this.l, this.h, this, 1);
+    };
+    HashSet.prototype.rEnd = function() {
+        return new HashSetIterator(this.h, this.h, this, 1);
+    };
+    HashSet.prototype.front = function() {
+        return this.H.u;
+    };
+    HashSet.prototype.back = function() {
+        return this.l.u;
+    };
+    HashSet.prototype.insert = function(t, r) {
+        return this.v(t, undefined, r);
+    };
+    HashSet.prototype.getElementByPos = function(t) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        var r = this.H;
+        while (t--) {
+            r = r.m;
+        }
+        return r.u;
+    };
+    HashSet.prototype.find = function(t, r) {
+        var e = this.g(t, r);
+        return new HashSetIterator(e, this.h, this);
+    };
+    HashSet.prototype.forEach = function(t) {
+        var r = 0;
+        var e = this.H;
+        while (e !== this.h) {
+            t(e.u, r++, this);
+            e = e.m;
+        }
+    };
+    HashSet.prototype[Symbol.iterator] = function() {
+        return function() {
+            var t;
+            return __generator(this, (function(r) {
+                switch (r.label) {
+                  case 0:
+                    t = this.H;
+                    r.label = 1;
+
+                  case 1:
+                    if (!(t !== this.h)) return [ 3, 3 ];
+                    return [ 4, t.u ];
+
+                  case 2:
+                    r.sent();
+                    t = t.m;
+                    return [ 3, 1 ];
+
+                  case 3:
+                    return [ 2 ];
+                }
+            }));
+        }.bind(this)();
+    };
+    return HashSet;
+}(HashContainer);
+
+export default HashSet;
+//# sourceMappingURL=HashSet.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashSet.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashSet.js.map
new file mode 100644
index 0000000..5f26e17
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/HashContainer/HashSet.js.map
@@ -0,0 +1 @@
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__extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nvar __generator = (this && this.__generator) || function (thisArg, body) {\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\n    function verb(n) { return function (v) { return step([n, v]); }; }\n    function step(op) {\n        if (f) throw new TypeError(\"Generator is already executing.\");\n        while (_) try {\n            if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\n            if (y = 0, t) op = [op[0] & 2, t.value];\n            switch (op[0]) {\n                case 0: case 1: t = op; break;\n                case 4: _.label++; return { value: op[1], done: false };\n                case 5: _.label++; y = op[1]; op = [0]; continue;\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\n                default:\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n                    if (t[2]) _.ops.pop();\n                    _.trys.pop(); continue;\n            }\n            op = body.call(thisArg, _);\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n    }\n};\nimport { HashContainer, HashContainerIterator } from \"./Base\";\nimport $checkWithinAccessParams from \"../../utils/checkParams.macro\";\nimport { throwIteratorAccessError } from \"../../utils/throwError\";\nvar HashSetIterator = /** @class */ (function (_super) {\n    __extends(HashSetIterator, _super);\n    function HashSetIterator(node, header, container, iteratorType) {\n        var _this = _super.call(this, node, header, iteratorType) || this;\n        _this.container = container;\n        return _this;\n    }\n    Object.defineProperty(HashSetIterator.prototype, \"pointer\", {\n        get: function () {\n            if (this._node === this._header) {\n                throwIteratorAccessError();\n            }\n            return this._node._key;\n        },\n        enumerable: false,\n        configurable: true\n    });\n    HashSetIterator.prototype.copy = function () {\n        return new HashSetIterator(this._node, this._header, this.container, this.iteratorType);\n    };\n    return HashSetIterator;\n}(HashContainerIterator));\nvar HashSet = /** @class */ (function (_super) {\n    __extends(HashSet, _super);\n    function HashSet(container) {\n        if (container === void 0) { container = []; }\n        var _this = _super.call(this) || this;\n        var self = _this;\n        container.forEach(function (el) {\n            self.insert(el);\n        });\n        return _this;\n    }\n    HashSet.prototype.begin = function () {\n        return new HashSetIterator(this._head, this._header, this);\n    };\n    HashSet.prototype.end = function () {\n        return new HashSetIterator(this._header, this._header, this);\n    };\n    HashSet.prototype.rBegin = function () {\n        return new HashSetIterator(this._tail, this._header, this, 1 /* IteratorType.REVERSE */);\n    };\n    HashSet.prototype.rEnd = function () {\n        return new HashSetIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    };\n    HashSet.prototype.front = function () {\n        return this._head._key;\n    };\n    HashSet.prototype.back = function () {\n        return this._tail._key;\n    };\n    /**\n     * @description Insert element to set.\n     * @param key - The key want to insert.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @returns The size of container after inserting.\n     */\n    HashSet.prototype.insert = function (key, isObject) {\n        return this._set(key, undefined, isObject);\n    };\n    HashSet.prototype.getElementByPos = function (pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        var node = this._head;\n        while (pos--) {\n            node = node._next;\n        }\n        return node._key;\n    };\n    /**\n     * @description Check key if exist in container.\n     * @param key - The element you want to search.\n     * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n     *                   If a `undefined` value is passed in, the type will be automatically judged.\n     * @returns An iterator pointing to the element if found, or super end if not found.\n     */\n    HashSet.prototype.find = function (key, isObject) {\n        var node = this._findElementNode(key, isObject);\n        return new HashSetIterator(node, this._header, this);\n    };\n    HashSet.prototype.forEach = function (callback) {\n        var index = 0;\n        var node = this._head;\n        while (node !== this._header) {\n            callback(node._key, index++, this);\n            node = node._next;\n        }\n    };\n    HashSet.prototype[Symbol.iterator] = function () {\n        return function () {\n            var node;\n            return __generator(this, function (_a) {\n                switch (_a.label) {\n                    case 0:\n                        node = this._head;\n                        _a.label = 1;\n                    case 1:\n                        if (!(node !== this._header)) return [3 /*break*/, 3];\n                        return [4 /*yield*/, node._key];\n                    case 2:\n                        _a.sent();\n                        node = node._next;\n                        return [3 /*break*/, 1];\n                    case 3: return [2 /*return*/];\n                }\n            });\n        }.bind(this)();\n    };\n    return HashSet;\n}(HashContainer));\nexport default HashSet;\n","import { initContainer, IteratorType } from '@/container/ContainerBase';\nimport { HashContainer, HashContainerIterator, HashLinkNode } from '@/container/HashContainer/Base';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nclass HashSetIterator<K> extends HashContainerIterator<K, undefined> {\n  readonly container: HashSet<K>;\n  constructor(\n    node: HashLinkNode<K, undefined>,\n    header: HashLinkNode<K, undefined>,\n    container: HashSet<K>,\n    iteratorType?: IteratorType\n  ) {\n    super(node, header, iteratorType);\n    this.container = container;\n  }\n  get pointer() {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    return this._node._key;\n  }\n  copy() {\n    return new HashSetIterator<K>(this._node, this._header, this.container, this.iteratorType);\n  }\n  // @ts-ignore\n  equals(iter: HashSetIterator<K>): boolean;\n}\n\nexport type { HashSetIterator };\n\nclass HashSet<K> extends HashContainer<K, undefined> {\n  constructor(container: initContainer<K> = []) {\n    super();\n    const self = this;\n    container.forEach(function (el) {\n      self.insert(el);\n    });\n  }\n  begin() {\n    return new HashSetIterator<K>(this._head, this._header, this);\n  }\n  end() {\n    return new HashSetIterator<K>(this._header, this._header, this);\n  }\n  rBegin() {\n    return new HashSetIterator<K>(this._tail, this._header, this, IteratorType.REVERSE);\n  }\n  rEnd() {\n    return new HashSetIterator<K>(this._header, this._header, this, IteratorType.REVERSE);\n  }\n  front(): K | undefined {\n    return this._head._key;\n  }\n  back(): K | undefined {\n    return this._tail._key;\n  }\n  /**\n   * @description Insert element to set.\n   * @param key - The key want to insert.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @returns The size of container after inserting.\n   */\n  insert(key: K, isObject?: boolean) {\n    return this._set(key, undefined, isObject);\n  }\n  getElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let node = this._head;\n    while (pos--) {\n      node = node._next;\n    }\n    return node._key;\n  }\n  /**\n   * @description Check key if exist in container.\n   * @param key - The element you want to search.\n   * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>\n   *                   If a `undefined` value is passed in, the type will be automatically judged.\n   * @returns An iterator pointing to the element if found, or super end if not found.\n   */\n  find(key: K, isObject?: boolean) {\n    const node = this._findElementNode(key, isObject);\n    return new HashSetIterator<K>(node, this._header, this);\n  }\n  forEach(callback: (element: K, index: number, container: HashSet<K>) => void) {\n    let index = 0;\n    let node = this._head;\n    while (node !== this._header) {\n      callback(node._key, index++, this);\n      node = node._next;\n    }\n  }\n  [Symbol.iterator]() {\n    return function * (this: HashSet<K>) {\n      let node = this._head;\n      while (node !== this._header) {\n        yield node._key;\n        node = node._next;\n      }\n    }.bind(this)();\n  }\n}\n\nexport default HashSet;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/PriorityQueue.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/PriorityQueue.d.ts
new file mode 100644
index 0000000..8937bef
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/PriorityQueue.d.ts
@@ -0,0 +1,79 @@
+import { Base, initContainer } from "../ContainerBase";
+declare class PriorityQueue<T> extends Base {
+    /**
+     * @description PriorityQueue's constructor.
+     * @param container - Initialize container, must have a forEach function.
+     * @param cmp - Compare function.
+     * @param copy - When the container is an array, you can choose to directly operate on the original object of
+     *               the array or perform a shallow copy. The default is shallow copy.
+     * @example
+     * new PriorityQueue();
+     * new PriorityQueue([1, 2, 3]);
+     * new PriorityQueue([1, 2, 3], (x, y) => x - y);
+     * new PriorityQueue([1, 2, 3], (x, y) => x - y, false);
+     */
+    constructor(container?: initContainer<T>, cmp?: (x: T, y: T) => number, copy?: boolean);
+    clear(): void;
+    /**
+     * @description Push element into a container in order.
+     * @param item - The element you want to push.
+     * @returns The size of heap after pushing.
+     * @example
+     * queue.push(1);
+     */
+    push(item: T): void;
+    /**
+     * @description Removes the top element.
+     * @returns The element you popped.
+     * @example
+     * queue.pop();
+     */
+    pop(): T | undefined;
+    /**
+     * @description Accesses the top element.
+     * @example
+     * const top = queue.top();
+     */
+    top(): T | undefined;
+    /**
+     * @description Check if element is in heap.
+     * @param item - The item want to find.
+     * @returns Whether element is in heap.
+     * @example
+     * const que = new PriorityQueue([], (x, y) => x.id - y.id);
+     * const obj = { id: 1 };
+     * que.push(obj);
+     * console.log(que.find(obj));  // true
+     */
+    find(item: T): boolean;
+    /**
+     * @description Remove specified item from heap.
+     * @param item - The item want to remove.
+     * @returns Whether remove success.
+     * @example
+     * const que = new PriorityQueue([], (x, y) => x.id - y.id);
+     * const obj = { id: 1 };
+     * que.push(obj);
+     * que.remove(obj);
+     */
+    remove(item: T): boolean;
+    /**
+     * @description Update item and it's pos in the heap.
+     * @param item - The item want to update.
+     * @returns Whether update success.
+     * @example
+     * const que = new PriorityQueue([], (x, y) => x.id - y.id);
+     * const obj = { id: 1 };
+     * que.push(obj);
+     * obj.id = 2;
+     * que.updateItem(obj);
+     */
+    updateItem(item: T): boolean;
+    /**
+     * @returns Return a copy array of heap.
+     * @example
+     * const arr = queue.toArray();
+     */
+    toArray(): T[];
+}
+export default PriorityQueue;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/PriorityQueue.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/PriorityQueue.js
new file mode 100644
index 0000000..54e5f49
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/PriorityQueue.js
@@ -0,0 +1,171 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(i, r) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(i, r) {
+            i.__proto__ = r;
+        } || function(i, r) {
+            for (var t in r) if (Object.prototype.hasOwnProperty.call(r, t)) i[t] = r[t];
+        };
+        return extendStatics(i, r);
+    };
+    return function(i, r) {
+        if (typeof r !== "function" && r !== null) throw new TypeError("Class extends value " + String(r) + " is not a constructor or null");
+        extendStatics(i, r);
+        function __() {
+            this.constructor = i;
+        }
+        i.prototype = r === null ? Object.create(r) : (__.prototype = r.prototype, new __);
+    };
+}();
+
+var __read = this && this.q || function(i, r) {
+    var t = typeof Symbol === "function" && i[Symbol.iterator];
+    if (!t) return i;
+    var e = t.call(i), n, u = [], s;
+    try {
+        while ((r === void 0 || r-- > 0) && !(n = e.next()).done) u.push(n.value);
+    } catch (i) {
+        s = {
+            error: i
+        };
+    } finally {
+        try {
+            if (n && !n.done && (t = e["return"])) t.call(e);
+        } finally {
+            if (s) throw s.error;
+        }
+    }
+    return u;
+};
+
+var __spreadArray = this && this.D || function(i, r, t) {
+    if (t || arguments.length === 2) for (var e = 0, n = r.length, u; e < n; e++) {
+        if (u || !(e in r)) {
+            if (!u) u = Array.prototype.slice.call(r, 0, e);
+            u[e] = r[e];
+        }
+    }
+    return i.concat(u || Array.prototype.slice.call(r));
+};
+
+import { Base } from "../ContainerBase";
+
+var PriorityQueue = function(i) {
+    __extends(PriorityQueue, i);
+    function PriorityQueue(r, t, e) {
+        if (r === void 0) {
+            r = [];
+        }
+        if (t === void 0) {
+            t = function(i, r) {
+                if (i > r) return -1;
+                if (i < r) return 1;
+                return 0;
+            };
+        }
+        if (e === void 0) {
+            e = true;
+        }
+        var n = i.call(this) || this;
+        n.$ = t;
+        if (Array.isArray(r)) {
+            n.ii = e ? __spreadArray([], __read(r), false) : r;
+        } else {
+            n.ii = [];
+            var u = n;
+            r.forEach((function(i) {
+                u.ii.push(i);
+            }));
+        }
+        n.M = n.ii.length;
+        var s = n.M >> 1;
+        for (var o = n.M - 1 >> 1; o >= 0; --o) {
+            n.ri(o, s);
+        }
+        return n;
+    }
+    PriorityQueue.prototype.ti = function(i) {
+        var r = this.ii[i];
+        while (i > 0) {
+            var t = i - 1 >> 1;
+            var e = this.ii[t];
+            if (this.$(e, r) <= 0) break;
+            this.ii[i] = e;
+            i = t;
+        }
+        this.ii[i] = r;
+    };
+    PriorityQueue.prototype.ri = function(i, r) {
+        var t = this.ii[i];
+        while (i < r) {
+            var e = i << 1 | 1;
+            var n = e + 1;
+            var u = this.ii[e];
+            if (n < this.M && this.$(u, this.ii[n]) > 0) {
+                e = n;
+                u = this.ii[n];
+            }
+            if (this.$(u, t) >= 0) break;
+            this.ii[i] = u;
+            i = e;
+        }
+        this.ii[i] = t;
+    };
+    PriorityQueue.prototype.clear = function() {
+        this.M = 0;
+        this.ii.length = 0;
+    };
+    PriorityQueue.prototype.push = function(i) {
+        this.ii.push(i);
+        this.ti(this.M);
+        this.M += 1;
+    };
+    PriorityQueue.prototype.pop = function() {
+        if (this.M === 0) return;
+        var i = this.ii[0];
+        var r = this.ii.pop();
+        this.M -= 1;
+        if (this.M) {
+            this.ii[0] = r;
+            this.ri(0, this.M >> 1);
+        }
+        return i;
+    };
+    PriorityQueue.prototype.top = function() {
+        return this.ii[0];
+    };
+    PriorityQueue.prototype.find = function(i) {
+        return this.ii.indexOf(i) >= 0;
+    };
+    PriorityQueue.prototype.remove = function(i) {
+        var r = this.ii.indexOf(i);
+        if (r < 0) return false;
+        if (r === 0) {
+            this.pop();
+        } else if (r === this.M - 1) {
+            this.ii.pop();
+            this.M -= 1;
+        } else {
+            this.ii.splice(r, 1, this.ii.pop());
+            this.M -= 1;
+            this.ti(r);
+            this.ri(r, this.M >> 1);
+        }
+        return true;
+    };
+    PriorityQueue.prototype.updateItem = function(i) {
+        var r = this.ii.indexOf(i);
+        if (r < 0) return false;
+        this.ti(r);
+        this.ri(r, this.M >> 1);
+        return true;
+    };
+    PriorityQueue.prototype.toArray = function() {
+        return __spreadArray([], __read(this.ii), false);
+    };
+    return PriorityQueue;
+}(Base);
+
+export default PriorityQueue;
+//# sourceMappingURL=PriorityQueue.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/PriorityQueue.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/PriorityQueue.js.map
new file mode 100644
index 0000000..a1589b8
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/PriorityQueue.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/OtherContainer/PriorityQueue.js","../../src/container/OtherContainer/PriorityQueue.ts"],"names":["__extends","this","extendStatics","d","b","Object","setPrototypeOf","__proto__","Array","p","prototype","hasOwnProperty","call","TypeError","String","__","constructor","create","__read","o","n","m","Symbol","iterator","i","r","ar","e","next","done","push","value","error","__spreadArray","to","from","pack","arguments","length","l","slice","concat","Base","PriorityQueue","_super","container","cmp","copy","x","y","_this","_cmp","isArray","_priorityQueue","self_1","forEach","el","_length","halfLength","parent_1","_pushDown","_pushUp","pos","item","parent_2","parentItem","left","right","minItem","clear","pop","last","top","find","indexOf","remove","index","splice","updateItem","toArray"],"mappings":"AAAA,IAAIA,YAAaC,QAAQA,KAAKD,KAAe;IACzC,IAAIE,gBAAgB,SAAUC,GAAGC;QAC7BF,gBAAgBG,OAAOC,kBAClB;YAAEC,WAAW;qBAAgBC,SAAS,SAAUL,GAAGC;YAAKD,EAAEI,YAAYH;AAAG,aAC1E,SAAUD,GAAGC;YAAK,KAAK,IAAIK,KAAKL,GAAG,IAAIC,OAAOK,UAAUC,eAAeC,KAAKR,GAAGK,IAAIN,EAAEM,KAAKL,EAAEK;AAAI;QACpG,OAAOP,cAAcC,GAAGC;AAC5B;IACA,OAAO,SAAUD,GAAGC;QAChB,WAAWA,MAAM,cAAcA,MAAM,MACjC,MAAM,IAAIS,UAAU,yBAAyBC,OAAOV,KAAK;QAC7DF,cAAcC,GAAGC;QACjB,SAASW;YAAOd,KAAKe,cAAcb;AAAG;QACtCA,EAAEO,YAAYN,MAAM,OAAOC,OAAOY,OAAOb,MAAMW,GAAGL,YAAYN,EAAEM,WAAW,IAAIK;AACnF;AACJ,CAd6C;;AAe7C,IAAIG,SAAUjB,QAAQA,KAAKiB,KAAW,SAAUC,GAAGC;IAC/C,IAAIC,WAAWC,WAAW,cAAcH,EAAEG,OAAOC;IACjD,KAAKF,GAAG,OAAOF;IACf,IAAIK,IAAIH,EAAET,KAAKO,IAAIM,GAAGC,IAAK,IAAIC;IAC/B;QACI,QAAQP,WAAW,KAAKA,MAAM,QAAQK,IAAID,EAAEI,QAAQC,MAAMH,EAAGI,KAAKL,EAAEM;AAQxE,MANA,OAAOC;QAASL,IAAI;YAAEK,OAAOA;;AAAS,MAAC;QAEnC;YACI,IAAIP,MAAMA,EAAEI,SAASR,IAAIG,EAAE,YAAYH,EAAET,KAAKY;AAElB,UAD/B;YACS,IAAIG,GAAG,MAAMA,EAAEK;AAAO;AACpC;IACA,OAAON;AACX;;AACA,IAAIO,gBAAiBhC,QAAQA,KAAKgC,KAAkB,SAAUC,GAAIC,GAAMC;IACpE,IAAIA,KAAQC,UAAUC,WAAW,GAAG,KAAK,IAAId,IAAI,GAAGe,IAAIJ,EAAKG,QAAQZ,GAAIF,IAAIe,GAAGf,KAAK;QACjF,IAAIE,OAAQF,KAAKW,IAAO;YACpB,KAAKT,GAAIA,IAAKlB,MAAME,UAAU8B,MAAM5B,KAAKuB,GAAM,GAAGX;YAClDE,EAAGF,KAAKW,EAAKX;AACjB;AACJ;IACA,OAAOU,EAAGO,OAAOf,KAAMlB,MAAME,UAAU8B,MAAM5B,KAAKuB;AACtD;;SCvCSO,YAAqB;;AAE9B,IAAAC,gBAAA,SAAAC;IAA+B5C,UAAA2C,eAAAC;IAqB7B,SAAAD,cACEE,GACAC,GAMAC;QAPA,IAAAF,WAAA,GAAA;YAAAA,IAAA;AAAgC;QAChC,IAAAC,WAAA,GAAA;YAAAA,IAAA,SACUE,GAAMC;gBACd,IAAID,IAAIC,GAAG,QAAQ;gBACnB,IAAID,IAAIC,GAAG,OAAO;gBAClB,OAAO;ADkCL;ACjCH;QACD,IAAAF,WAAA,GAAA;YAAAA,IAAA;AAAW;QARb,IAAAG,IAUEN,EAAAhC,KAAAX,SAAOA;QACPiD,EAAKC,IAAOL;QACZ,IAAItC,MAAM4C,QAAQP,IAAY;YAC5BK,EAAKG,KAAiBN,IAAMd,cAAA,IAAAf,OAAK2B,IAAS,SAAIA;ADiC5C,eChCG;YACLK,EAAKG,KAAiB;YACtB,IAAMC,IAAOJ;YACbL,EAAUU,SAAQ,SAAUC;gBAC1BF,EAAKD,GAAevB,KAAK0B;ADkCrB;AACJ;QChCJN,EAAKO,IAAUP,EAAKG,GAAef;QACnC,IAAMoB,IAAaR,EAAKO,KAAW;QACnC,KAAK,IAAIE,IAAUT,EAAKO,IAAU,KAAM,GAAGE,KAAU,KAAKA,GAAQ;YAChET,EAAKU,GAAUD,GAAQD;ADkCrB;QACA,OAAOR;AACX;IC9BMP,cAAAjC,UAAAmD,KAAR,SAAgBC;QACd,IAAMC,IAAO9D,KAAKoD,GAAeS;QACjC,OAAOA,IAAM,GAAG;YACd,IAAME,IAAUF,IAAM,KAAM;YAC5B,IAAMG,IAAahE,KAAKoD,GAAeW;YACvC,IAAI/D,KAAKkD,EAAKc,GAAYF,MAAS,GAAG;YACtC9D,KAAKoD,GAAeS,KAAOG;YAC3BH,IAAME;ADoCJ;QClCJ/D,KAAKoD,GAAeS,KAAOC;ADoC3B;IC/BMpB,cAAAjC,UAAAkD,KAAR,SAAkBE,GAAaJ;QAC7B,IAAMK,IAAO9D,KAAKoD,GAAeS;QACjC,OAAOA,IAAMJ,GAAY;YACvB,IAAIQ,IAAOJ,KAAO,IAAI;YACtB,IAAMK,IAAQD,IAAO;YACrB,IAAIE,IAAUnE,KAAKoD,GAAea;YAClC,IACEC,IAAQlE,KAAKwD,KACbxD,KAAKkD,EAAKiB,GAASnE,KAAKoD,GAAec,MAAU,GACjD;gBACAD,IAAOC;gBACPC,IAAUnE,KAAKoD,GAAec;ADkC1B;YChCN,IAAIlE,KAAKkD,EAAKiB,GAASL,MAAS,GAAG;YACnC9D,KAAKoD,GAAeS,KAAOM;YAC3BN,IAAMI;ADmCJ;QCjCJjE,KAAKoD,GAAeS,KAAOC;ADmC3B;ICjCFpB,cAAAjC,UAAA2D,QAAA;QACEpE,KAAKwD,IAAU;QACfxD,KAAKoD,GAAef,SAAS;ADmC7B;IC1BFK,cAAAjC,UAAAoB,OAAA,SAAKiC;QACH9D,KAAKoD,GAAevB,KAAKiC;QACzB9D,KAAK4D,GAAQ5D,KAAKwD;QAClBxD,KAAKwD,KAAW;ADmChB;IC3BFd,cAAAjC,UAAA4D,MAAA;QACE,IAAIrE,KAAKwD,MAAY,GAAG;QACxB,IAAM1B,IAAQ9B,KAAKoD,GAAe;QAClC,IAAMkB,IAAOtE,KAAKoD,GAAeiB;QACjCrE,KAAKwD,KAAW;QAChB,IAAIxD,KAAKwD,GAAS;YAChBxD,KAAKoD,GAAe,KAAKkB;YACzBtE,KAAK2D,GAAU,GAAG3D,KAAKwD,KAAW;ADoChC;QClCJ,OAAO1B;ADoCP;IC7BFY,cAAAjC,UAAA8D,MAAA;QACE,OAAOvE,KAAKoD,GAAe;ADoC3B;ICxBFV,cAAAjC,UAAA+D,OAAA,SAAKV;QACH,OAAO9D,KAAKoD,GAAeqB,QAAQX,MAAS;ADoC5C;ICxBFpB,cAAAjC,UAAAiE,SAAA,SAAOZ;QACL,IAAMa,IAAQ3E,KAAKoD,GAAeqB,QAAQX;QAC1C,IAAIa,IAAQ,GAAG,OAAO;QACtB,IAAIA,MAAU,GAAG;YACf3E,KAAKqE;ADqCH,eCpCG,IAAIM,MAAU3E,KAAKwD,IAAU,GAAG;YACrCxD,KAAKoD,GAAeiB;YACpBrE,KAAKwD,KAAW;ADsCd,eCrCG;YACLxD,KAAKoD,GAAewB,OAAOD,GAAO,GAAG3E,KAAKoD,GAAeiB;YACzDrE,KAAKwD,KAAW;YAChBxD,KAAK4D,GAAQe;YACb3E,KAAK2D,GAAUgB,GAAO3E,KAAKwD,KAAW;ADuCpC;QCrCJ,OAAO;ADuCP;IC1BFd,cAAAjC,UAAAoE,aAAA,SAAWf;QACT,IAAMa,IAAQ3E,KAAKoD,GAAeqB,QAAQX;QAC1C,IAAIa,IAAQ,GAAG,OAAO;QACtB3E,KAAK4D,GAAQe;QACb3E,KAAK2D,GAAUgB,GAAO3E,KAAKwD,KAAW;QACtC,OAAO;ADwCP;ICjCFd,cAAAjC,UAAAqE,UAAA;QACE,OAAA9C,cAAA,IAAAf,OAAWjB,KAAKoD,KAAc;ADwC9B;ICtCJ,OAAAV;AAAA,CA9LA,CAA+BD;;eAgMhBC","file":"PriorityQueue.js","sourcesContent":["var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nvar __read = (this && this.__read) || function (o, n) {\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator];\n    if (!m) return o;\n    var i = m.call(o), r, ar = [], e;\n    try {\n        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\n    }\n    catch (error) { e = { error: error }; }\n    finally {\n        try {\n            if (r && !r.done && (m = i[\"return\"])) m.call(i);\n        }\n        finally { if (e) throw e.error; }\n    }\n    return ar;\n};\nvar __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {\n    if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {\n        if (ar || !(i in from)) {\n            if (!ar) ar = Array.prototype.slice.call(from, 0, i);\n            ar[i] = from[i];\n        }\n    }\n    return to.concat(ar || Array.prototype.slice.call(from));\n};\nimport { Base } from \"../ContainerBase\";\nvar PriorityQueue = /** @class */ (function (_super) {\n    __extends(PriorityQueue, _super);\n    /**\n     * @description PriorityQueue's constructor.\n     * @param container - Initialize container, must have a forEach function.\n     * @param cmp - Compare function.\n     * @param copy - When the container is an array, you can choose to directly operate on the original object of\n     *               the array or perform a shallow copy. The default is shallow copy.\n     * @example\n     * new PriorityQueue();\n     * new PriorityQueue([1, 2, 3]);\n     * new PriorityQueue([1, 2, 3], (x, y) => x - y);\n     * new PriorityQueue([1, 2, 3], (x, y) => x - y, false);\n     */\n    function PriorityQueue(container, cmp, copy) {\n        if (container === void 0) { container = []; }\n        if (cmp === void 0) { cmp = function (x, y) {\n            if (x > y)\n                return -1;\n            if (x < y)\n                return 1;\n            return 0;\n        }; }\n        if (copy === void 0) { copy = true; }\n        var _this = _super.call(this) || this;\n        _this._cmp = cmp;\n        if (Array.isArray(container)) {\n            _this._priorityQueue = copy ? __spreadArray([], __read(container), false) : container;\n        }\n        else {\n            _this._priorityQueue = [];\n            var self_1 = _this;\n            container.forEach(function (el) {\n                self_1._priorityQueue.push(el);\n            });\n        }\n        _this._length = _this._priorityQueue.length;\n        var halfLength = _this._length >> 1;\n        for (var parent_1 = (_this._length - 1) >> 1; parent_1 >= 0; --parent_1) {\n            _this._pushDown(parent_1, halfLength);\n        }\n        return _this;\n    }\n    /**\n     * @internal\n     */\n    PriorityQueue.prototype._pushUp = function (pos) {\n        var item = this._priorityQueue[pos];\n        while (pos > 0) {\n            var parent_2 = (pos - 1) >> 1;\n            var parentItem = this._priorityQueue[parent_2];\n            if (this._cmp(parentItem, item) <= 0)\n                break;\n            this._priorityQueue[pos] = parentItem;\n            pos = parent_2;\n        }\n        this._priorityQueue[pos] = item;\n    };\n    /**\n     * @internal\n     */\n    PriorityQueue.prototype._pushDown = function (pos, halfLength) {\n        var item = this._priorityQueue[pos];\n        while (pos < halfLength) {\n            var left = pos << 1 | 1;\n            var right = left + 1;\n            var minItem = this._priorityQueue[left];\n            if (right < this._length &&\n                this._cmp(minItem, this._priorityQueue[right]) > 0) {\n                left = right;\n                minItem = this._priorityQueue[right];\n            }\n            if (this._cmp(minItem, item) >= 0)\n                break;\n            this._priorityQueue[pos] = minItem;\n            pos = left;\n        }\n        this._priorityQueue[pos] = item;\n    };\n    PriorityQueue.prototype.clear = function () {\n        this._length = 0;\n        this._priorityQueue.length = 0;\n    };\n    /**\n     * @description Push element into a container in order.\n     * @param item - The element you want to push.\n     * @returns The size of heap after pushing.\n     * @example\n     * queue.push(1);\n     */\n    PriorityQueue.prototype.push = function (item) {\n        this._priorityQueue.push(item);\n        this._pushUp(this._length);\n        this._length += 1;\n    };\n    /**\n     * @description Removes the top element.\n     * @returns The element you popped.\n     * @example\n     * queue.pop();\n     */\n    PriorityQueue.prototype.pop = function () {\n        if (this._length === 0)\n            return;\n        var value = this._priorityQueue[0];\n        var last = this._priorityQueue.pop();\n        this._length -= 1;\n        if (this._length) {\n            this._priorityQueue[0] = last;\n            this._pushDown(0, this._length >> 1);\n        }\n        return value;\n    };\n    /**\n     * @description Accesses the top element.\n     * @example\n     * const top = queue.top();\n     */\n    PriorityQueue.prototype.top = function () {\n        return this._priorityQueue[0];\n    };\n    /**\n     * @description Check if element is in heap.\n     * @param item - The item want to find.\n     * @returns Whether element is in heap.\n     * @example\n     * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n     * const obj = { id: 1 };\n     * que.push(obj);\n     * console.log(que.find(obj));  // true\n     */\n    PriorityQueue.prototype.find = function (item) {\n        return this._priorityQueue.indexOf(item) >= 0;\n    };\n    /**\n     * @description Remove specified item from heap.\n     * @param item - The item want to remove.\n     * @returns Whether remove success.\n     * @example\n     * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n     * const obj = { id: 1 };\n     * que.push(obj);\n     * que.remove(obj);\n     */\n    PriorityQueue.prototype.remove = function (item) {\n        var index = this._priorityQueue.indexOf(item);\n        if (index < 0)\n            return false;\n        if (index === 0) {\n            this.pop();\n        }\n        else if (index === this._length - 1) {\n            this._priorityQueue.pop();\n            this._length -= 1;\n        }\n        else {\n            this._priorityQueue.splice(index, 1, this._priorityQueue.pop());\n            this._length -= 1;\n            this._pushUp(index);\n            this._pushDown(index, this._length >> 1);\n        }\n        return true;\n    };\n    /**\n     * @description Update item and it's pos in the heap.\n     * @param item - The item want to update.\n     * @returns Whether update success.\n     * @example\n     * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n     * const obj = { id: 1 };\n     * que.push(obj);\n     * obj.id = 2;\n     * que.updateItem(obj);\n     */\n    PriorityQueue.prototype.updateItem = function (item) {\n        var index = this._priorityQueue.indexOf(item);\n        if (index < 0)\n            return false;\n        this._pushUp(index);\n        this._pushDown(index, this._length >> 1);\n        return true;\n    };\n    /**\n     * @returns Return a copy array of heap.\n     * @example\n     * const arr = queue.toArray();\n     */\n    PriorityQueue.prototype.toArray = function () {\n        return __spreadArray([], __read(this._priorityQueue), false);\n    };\n    return PriorityQueue;\n}(Base));\nexport default PriorityQueue;\n","import { Base, initContainer } from '@/container/ContainerBase';\n\nclass PriorityQueue<T> extends Base {\n  /**\n   * @internal\n   */\n  private readonly _priorityQueue: T[];\n  /**\n   * @internal\n   */\n  private readonly _cmp: (x: T, y: T) => number;\n  /**\n   * @description PriorityQueue's constructor.\n   * @param container - Initialize container, must have a forEach function.\n   * @param cmp - Compare function.\n   * @param copy - When the container is an array, you can choose to directly operate on the original object of\n   *               the array or perform a shallow copy. The default is shallow copy.\n   * @example\n   * new PriorityQueue();\n   * new PriorityQueue([1, 2, 3]);\n   * new PriorityQueue([1, 2, 3], (x, y) => x - y);\n   * new PriorityQueue([1, 2, 3], (x, y) => x - y, false);\n   */\n  constructor(\n    container: initContainer<T> = [],\n    cmp: (x: T, y: T) => number =\n    function (x: T, y: T) {\n      if (x > y) return -1;\n      if (x < y) return 1;\n      return 0;\n    },\n    copy = true\n  ) {\n    super();\n    this._cmp = cmp;\n    if (Array.isArray(container)) {\n      this._priorityQueue = copy ? [...container] : container;\n    } else {\n      this._priorityQueue = [];\n      const self = this;\n      container.forEach(function (el) {\n        self._priorityQueue.push(el);\n      });\n    }\n    this._length = this._priorityQueue.length;\n    const halfLength = this._length >> 1;\n    for (let parent = (this._length - 1) >> 1; parent >= 0; --parent) {\n      this._pushDown(parent, halfLength);\n    }\n  }\n  /**\n   * @internal\n   */\n  private _pushUp(pos: number) {\n    const item = this._priorityQueue[pos];\n    while (pos > 0) {\n      const parent = (pos - 1) >> 1;\n      const parentItem = this._priorityQueue[parent];\n      if (this._cmp(parentItem, item) <= 0) break;\n      this._priorityQueue[pos] = parentItem;\n      pos = parent;\n    }\n    this._priorityQueue[pos] = item;\n  }\n  /**\n   * @internal\n   */\n  private _pushDown(pos: number, halfLength: number) {\n    const item = this._priorityQueue[pos];\n    while (pos < halfLength) {\n      let left = pos << 1 | 1;\n      const right = left + 1;\n      let minItem = this._priorityQueue[left];\n      if (\n        right < this._length &&\n        this._cmp(minItem, this._priorityQueue[right]) > 0\n      ) {\n        left = right;\n        minItem = this._priorityQueue[right];\n      }\n      if (this._cmp(minItem, item) >= 0) break;\n      this._priorityQueue[pos] = minItem;\n      pos = left;\n    }\n    this._priorityQueue[pos] = item;\n  }\n  clear() {\n    this._length = 0;\n    this._priorityQueue.length = 0;\n  }\n  /**\n   * @description Push element into a container in order.\n   * @param item - The element you want to push.\n   * @returns The size of heap after pushing.\n   * @example\n   * queue.push(1);\n   */\n  push(item: T) {\n    this._priorityQueue.push(item);\n    this._pushUp(this._length);\n    this._length += 1;\n  }\n  /**\n   * @description Removes the top element.\n   * @returns The element you popped.\n   * @example\n   * queue.pop();\n   */\n  pop() {\n    if (this._length === 0) return;\n    const value = this._priorityQueue[0];\n    const last = this._priorityQueue.pop()!;\n    this._length -= 1;\n    if (this._length) {\n      this._priorityQueue[0] = last;\n      this._pushDown(0, this._length >> 1);\n    }\n    return value;\n  }\n  /**\n   * @description Accesses the top element.\n   * @example\n   * const top = queue.top();\n   */\n  top(): T | undefined {\n    return this._priorityQueue[0];\n  }\n  /**\n   * @description Check if element is in heap.\n   * @param item - The item want to find.\n   * @returns Whether element is in heap.\n   * @example\n   * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n   * const obj = { id: 1 };\n   * que.push(obj);\n   * console.log(que.find(obj));  // true\n   */\n  find(item: T) {\n    return this._priorityQueue.indexOf(item) >= 0;\n  }\n  /**\n   * @description Remove specified item from heap.\n   * @param item - The item want to remove.\n   * @returns Whether remove success.\n   * @example\n   * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n   * const obj = { id: 1 };\n   * que.push(obj);\n   * que.remove(obj);\n   */\n  remove(item: T) {\n    const index = this._priorityQueue.indexOf(item);\n    if (index < 0) return false;\n    if (index === 0) {\n      this.pop();\n    } else if (index === this._length - 1) {\n      this._priorityQueue.pop();\n      this._length -= 1;\n    } else {\n      this._priorityQueue.splice(index, 1, this._priorityQueue.pop()!);\n      this._length -= 1;\n      this._pushUp(index);\n      this._pushDown(index, this._length >> 1);\n    }\n    return true;\n  }\n  /**\n   * @description Update item and it's pos in the heap.\n   * @param item - The item want to update.\n   * @returns Whether update success.\n   * @example\n   * const que = new PriorityQueue([], (x, y) => x.id - y.id);\n   * const obj = { id: 1 };\n   * que.push(obj);\n   * obj.id = 2;\n   * que.updateItem(obj);\n   */\n  updateItem(item: T) {\n    const index = this._priorityQueue.indexOf(item);\n    if (index < 0) return false;\n    this._pushUp(index);\n    this._pushDown(index, this._length >> 1);\n    return true;\n  }\n  /**\n   * @returns Return a copy array of heap.\n   * @example\n   * const arr = queue.toArray();\n   */\n  toArray() {\n    return [...this._priorityQueue];\n  }\n}\n\nexport default PriorityQueue;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Queue.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Queue.d.ts
new file mode 100644
index 0000000..8df4e17
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Queue.d.ts
@@ -0,0 +1,22 @@
+import { Base, initContainer } from "../ContainerBase";
+declare class Queue<T> extends Base {
+    constructor(container?: initContainer<T>);
+    clear(): void;
+    /**
+     * @description Inserts element to queue's end.
+     * @param element - The element you want to push to the front.
+     * @returns The container length after pushing.
+     */
+    push(element: T): number;
+    /**
+     * @description Removes the first element.
+     * @returns The element you popped.
+     */
+    pop(): T | undefined;
+    /**
+     * @description Access the first element.
+     * @returns The first element.
+     */
+    front(): T | undefined;
+}
+export default Queue;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Queue.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Queue.js
new file mode 100644
index 0000000..9d8e965
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Queue.js
@@ -0,0 +1,69 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(t, i) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(t, i) {
+            t.__proto__ = i;
+        } || function(t, i) {
+            for (var n in i) if (Object.prototype.hasOwnProperty.call(i, n)) t[n] = i[n];
+        };
+        return extendStatics(t, i);
+    };
+    return function(t, i) {
+        if (typeof i !== "function" && i !== null) throw new TypeError("Class extends value " + String(i) + " is not a constructor or null");
+        extendStatics(t, i);
+        function __() {
+            this.constructor = t;
+        }
+        t.prototype = i === null ? Object.create(i) : (__.prototype = i.prototype, new __);
+    };
+}();
+
+import { Base } from "../ContainerBase";
+
+var Queue = function(t) {
+    __extends(Queue, t);
+    function Queue(i) {
+        if (i === void 0) {
+            i = [];
+        }
+        var n = t.call(this) || this;
+        n.A = 0;
+        n.tt = [];
+        var e = n;
+        i.forEach((function(t) {
+            e.push(t);
+        }));
+        return n;
+    }
+    Queue.prototype.clear = function() {
+        this.tt = [];
+        this.M = this.A = 0;
+    };
+    Queue.prototype.push = function(t) {
+        var i = this.tt.length;
+        if (this.A / i > .5 && this.A + this.M >= i && i > 4096) {
+            var n = this.M;
+            for (var e = 0; e < n; ++e) {
+                this.tt[e] = this.tt[this.A + e];
+            }
+            this.A = 0;
+            this.tt[this.M] = t;
+        } else this.tt[this.A + this.M] = t;
+        return ++this.M;
+    };
+    Queue.prototype.pop = function() {
+        if (this.M === 0) return;
+        var t = this.tt[this.A++];
+        this.M -= 1;
+        return t;
+    };
+    Queue.prototype.front = function() {
+        if (this.M === 0) return;
+        return this.tt[this.A];
+    };
+    return Queue;
+}(Base);
+
+export default Queue;
+//# sourceMappingURL=Queue.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Queue.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Queue.js.map
new file mode 100644
index 0000000..9a6889d
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Queue.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/OtherContainer/Queue.js","../../src/container/OtherContainer/Queue.ts"],"names":["__extends","this","extendStatics","d","b","Object","setPrototypeOf","__proto__","Array","p","prototype","hasOwnProperty","call","TypeError","String","__","constructor","create","Base","Queue","_super","container","_this","_first","_queue","self","forEach","el","push","clear","_length","element","capacity","length","length_1","i","pop","front"],"mappings":"AAAA,IAAIA,YAAaC,QAAQA,KAAKD,KAAe;IACzC,IAAIE,gBAAgB,SAAUC,GAAGC;QAC7BF,gBAAgBG,OAAOC,kBAClB;YAAEC,WAAW;qBAAgBC,SAAS,SAAUL,GAAGC;YAAKD,EAAEI,YAAYH;AAAG,aAC1E,SAAUD,GAAGC;YAAK,KAAK,IAAIK,KAAKL,GAAG,IAAIC,OAAOK,UAAUC,eAAeC,KAAKR,GAAGK,IAAIN,EAAEM,KAAKL,EAAEK;AAAI;QACpG,OAAOP,cAAcC,GAAGC;AAC5B;IACA,OAAO,SAAUD,GAAGC;QAChB,WAAWA,MAAM,cAAcA,MAAM,MACjC,MAAM,IAAIS,UAAU,yBAAyBC,OAAOV,KAAK;QAC7DF,cAAcC,GAAGC;QACjB,SAASW;YAAOd,KAAKe,cAAcb;AAAG;QACtCA,EAAEO,YAAYN,MAAM,OAAOC,OAAOY,OAAOb,MAAMW,GAAGL,YAAYN,EAAEM,WAAW,IAAIK;AACnF;AACJ,CAd6C;;SCApCG,YAAqB;;AAO9B,IAAAC,QAAA,SAAAC;IAAuBpB,UAAAmB,OAAAC;IASrB,SAAAD,MAAYE;QAAA,IAAAA,WAAA,GAAA;YAAAA,IAAA;AAAgC;QAA5C,IAAAC,IACEF,EAAAR,KAAAX,SAAOA;QANDqB,EAAAC,IAAS;QAITD,EAAAE,KAAc;QAGpB,IAAMC,IAAOH;QACbD,EAAUK,SAAQ,SAAUC;YAC1BF,EAAKG,KAAKD;ADYR;QACA,OAAOL;AACX;ICXFH,MAAAT,UAAAmB,QAAA;QACE5B,KAAKuB,KAAS;QACdvB,KAAK6B,IAAU7B,KAAKsB,IAAS;ADa7B;ICNFJ,MAAAT,UAAAkB,OAAA,SAAKG;QACH,IAAMC,IAAW/B,KAAKuB,GAAOS;QAC7B,IACGhC,KAAKsB,IAASS,IAAS,MACvB/B,KAAKsB,IAAStB,KAAK6B,KAAYE,KAChCA,IAAQ,MACR;YACA,IAAME,IAASjC,KAAK6B;YACpB,KAAK,IAAIK,IAAI,GAAGA,IAAID,KAAUC,GAAG;gBAC/BlC,KAAKuB,GAAOW,KAAKlC,KAAKuB,GAAOvB,KAAKsB,IAASY;ADWvC;YCTNlC,KAAKsB,IAAS;YACdtB,KAAKuB,GAAOvB,KAAK6B,KAAWC;ADW1B,eCVG9B,KAAKuB,GAAOvB,KAAKsB,IAAStB,KAAK6B,KAAWC;QACjD,SAAS9B,KAAK6B;ADad;ICPFX,MAAAT,UAAA0B,MAAA;QACE,IAAInC,KAAK6B,MAAY,GAAG;QACxB,IAAMH,IAAK1B,KAAKuB,GAAOvB,KAAKsB;QAC5BtB,KAAK6B,KAAW;QAChB,OAAOH;ADcP;ICRFR,MAAAT,UAAA2B,QAAA;QACE,IAAIpC,KAAK6B,MAAY,GAAG;QACxB,OAAO7B,KAAKuB,GAAOvB,KAAKsB;ADexB;ICbJ,OAAAJ;AAAA,CA3DA,CAAuBD;;eA6DRC","file":"Queue.js","sourcesContent":["var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nimport { Base } from \"../ContainerBase\";\nvar Queue = /** @class */ (function (_super) {\n    __extends(Queue, _super);\n    function Queue(container) {\n        if (container === void 0) { container = []; }\n        var _this = _super.call(this) || this;\n        /**\n         * @internal\n         */\n        _this._first = 0;\n        /**\n         * @internal\n         */\n        _this._queue = [];\n        var self = _this;\n        container.forEach(function (el) {\n            self.push(el);\n        });\n        return _this;\n    }\n    Queue.prototype.clear = function () {\n        this._queue = [];\n        this._length = this._first = 0;\n    };\n    /**\n     * @description Inserts element to queue's end.\n     * @param element - The element you want to push to the front.\n     * @returns The container length after pushing.\n     */\n    Queue.prototype.push = function (element) {\n        var capacity = this._queue.length;\n        if ((this._first / capacity) > 0.5 /* QUEUE_CONSTANT.ALLOCATE_SIGMA */ &&\n            (this._first + this._length) >= capacity &&\n            capacity > 4096 /* QUEUE_CONSTANT.MIN_ALLOCATE_SIZE */) {\n            var length_1 = this._length;\n            for (var i = 0; i < length_1; ++i) {\n                this._queue[i] = this._queue[this._first + i];\n            }\n            this._first = 0;\n            this._queue[this._length] = element;\n        }\n        else\n            this._queue[this._first + this._length] = element;\n        return ++this._length;\n    };\n    /**\n     * @description Removes the first element.\n     * @returns The element you popped.\n     */\n    Queue.prototype.pop = function () {\n        if (this._length === 0)\n            return;\n        var el = this._queue[this._first++];\n        this._length -= 1;\n        return el;\n    };\n    /**\n     * @description Access the first element.\n     * @returns The first element.\n     */\n    Queue.prototype.front = function () {\n        if (this._length === 0)\n            return;\n        return this._queue[this._first];\n    };\n    return Queue;\n}(Base));\nexport default Queue;\n","import { Base, initContainer } from '@/container/ContainerBase';\n\nconst enum QUEUE_CONSTANT {\n  ALLOCATE_SIGMA = 0.5,\n  MIN_ALLOCATE_SIZE = (1 << 12)\n}\n\nclass Queue<T> extends Base {\n  /**\n   * @internal\n   */\n  private _first = 0;\n  /**\n   * @internal\n   */\n  private _queue: T[] = [];\n  constructor(container: initContainer<T> = []) {\n    super();\n    const self = this;\n    container.forEach(function (el) {\n      self.push(el);\n    });\n  }\n  clear() {\n    this._queue = [];\n    this._length = this._first = 0;\n  }\n  /**\n   * @description Inserts element to queue's end.\n   * @param element - The element you want to push to the front.\n   * @returns The container length after pushing.\n   */\n  push(element: T) {\n    const capacity = this._queue.length;\n    if (\n      (this._first / capacity) > QUEUE_CONSTANT.ALLOCATE_SIGMA &&\n      (this._first + this._length) >= capacity &&\n      capacity > QUEUE_CONSTANT.MIN_ALLOCATE_SIZE\n    ) {\n      const length = this._length;\n      for (let i = 0; i < length; ++i) {\n        this._queue[i] = this._queue[this._first + i];\n      }\n      this._first = 0;\n      this._queue[this._length] = element;\n    } else this._queue[this._first + this._length] = element;\n    return ++this._length;\n  }\n  /**\n   * @description Removes the first element.\n   * @returns The element you popped.\n   */\n  pop() {\n    if (this._length === 0) return;\n    const el = this._queue[this._first++];\n    this._length -= 1;\n    return el;\n  }\n  /**\n   * @description Access the first element.\n   * @returns The first element.\n   */\n  front(): T | undefined {\n    if (this._length === 0) return;\n    return this._queue[this._first];\n  }\n}\n\nexport default Queue;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Stack.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Stack.d.ts
new file mode 100644
index 0000000..3b8fac1
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Stack.d.ts
@@ -0,0 +1,22 @@
+import { Base, initContainer } from "../ContainerBase";
+declare class Stack<T> extends Base {
+    constructor(container?: initContainer<T>);
+    clear(): void;
+    /**
+     * @description Insert element to stack's end.
+     * @description The element you want to push to the back.
+     * @returns The container length after erasing.
+     */
+    push(element: T): number;
+    /**
+     * @description Removes the end element.
+     * @returns The element you popped.
+     */
+    pop(): T | undefined;
+    /**
+     * @description Accesses the end element.
+     * @returns The last element.
+     */
+    top(): T | undefined;
+}
+export default Stack;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Stack.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Stack.js
new file mode 100644
index 0000000..a7cd3bd
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Stack.js
@@ -0,0 +1,59 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(t, n) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(t, n) {
+            t.__proto__ = n;
+        } || function(t, n) {
+            for (var i in n) if (Object.prototype.hasOwnProperty.call(n, i)) t[i] = n[i];
+        };
+        return extendStatics(t, n);
+    };
+    return function(t, n) {
+        if (typeof n !== "function" && n !== null) throw new TypeError("Class extends value " + String(n) + " is not a constructor or null");
+        extendStatics(t, n);
+        function __() {
+            this.constructor = t;
+        }
+        t.prototype = n === null ? Object.create(n) : (__.prototype = n.prototype, new __);
+    };
+}();
+
+import { Base } from "../ContainerBase";
+
+var Stack = function(t) {
+    __extends(Stack, t);
+    function Stack(n) {
+        if (n === void 0) {
+            n = [];
+        }
+        var i = t.call(this) || this;
+        i.nt = [];
+        var r = i;
+        n.forEach((function(t) {
+            r.push(t);
+        }));
+        return i;
+    }
+    Stack.prototype.clear = function() {
+        this.M = 0;
+        this.nt = [];
+    };
+    Stack.prototype.push = function(t) {
+        this.nt.push(t);
+        this.M += 1;
+        return this.M;
+    };
+    Stack.prototype.pop = function() {
+        if (this.M === 0) return;
+        this.M -= 1;
+        return this.nt.pop();
+    };
+    Stack.prototype.top = function() {
+        return this.nt[this.M - 1];
+    };
+    return Stack;
+}(Base);
+
+export default Stack;
+//# sourceMappingURL=Stack.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Stack.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Stack.js.map
new file mode 100644
index 0000000..c15b4f1
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/OtherContainer/Stack.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/OtherContainer/Stack.js","../../src/container/OtherContainer/Stack.ts"],"names":["__extends","this","extendStatics","d","b","Object","setPrototypeOf","__proto__","Array","p","prototype","hasOwnProperty","call","TypeError","String","__","constructor","create","Base","Stack","_super","container","_this","_stack","self","forEach","el","push","clear","_length","element","pop","top"],"mappings":"AAAA,IAAIA,YAAaC,QAAQA,KAAKD,KAAe;IACzC,IAAIE,gBAAgB,SAAUC,GAAGC;QAC7BF,gBAAgBG,OAAOC,kBAClB;YAAEC,WAAW;qBAAgBC,SAAS,SAAUL,GAAGC;YAAKD,EAAEI,YAAYH;AAAG,aAC1E,SAAUD,GAAGC;YAAK,KAAK,IAAIK,KAAKL,GAAG,IAAIC,OAAOK,UAAUC,eAAeC,KAAKR,GAAGK,IAAIN,EAAEM,KAAKL,EAAEK;AAAI;QACpG,OAAOP,cAAcC,GAAGC;AAC5B;IACA,OAAO,SAAUD,GAAGC;QAChB,WAAWA,MAAM,cAAcA,MAAM,MACjC,MAAM,IAAIS,UAAU,yBAAyBC,OAAOV,KAAK;QAC7DF,cAAcC,GAAGC;QACjB,SAASW;YAAOd,KAAKe,cAAcb;AAAG;QACtCA,EAAEO,YAAYN,MAAM,OAAOC,OAAOY,OAAOb,MAAMW,GAAGL,YAAYN,EAAEM,WAAW,IAAIK;AACnF;AACJ,CAd6C;;SCApCG,YAAqB;;AAE9B,IAAAC,QAAA,SAAAC;IAAuBpB,UAAAmB,OAAAC;IAKrB,SAAAD,MAAYE;QAAA,IAAAA,WAAA,GAAA;YAAAA,IAAA;AAAgC;QAA5C,IAAAC,IACEF,EAAAR,KAAAX,SAAOA;QAFDqB,EAAAC,KAAc;QAGpB,IAAMC,IAAOF;QACbD,EAAUI,SAAQ,SAAUC;YAC1BF,EAAKG,KAAKD;ADiBR;QACA,OAAOJ;AACX;IChBFH,MAAAT,UAAAkB,QAAA;QACE3B,KAAK4B,IAAU;QACf5B,KAAKsB,KAAS;ADkBd;ICXFJ,MAAAT,UAAAiB,OAAA,SAAKG;QACH7B,KAAKsB,GAAOI,KAAKG;QACjB7B,KAAK4B,KAAW;QAChB,OAAO5B,KAAK4B;ADkBZ;ICZFV,MAAAT,UAAAqB,MAAA;QACE,IAAI9B,KAAK4B,MAAY,GAAG;QACxB5B,KAAK4B,KAAW;QAChB,OAAO5B,KAAKsB,GAAOQ;ADmBnB;ICbFZ,MAAAT,UAAAsB,MAAA;QACE,OAAO/B,KAAKsB,GAAOtB,KAAK4B,IAAU;ADmBlC;ICjBJ,OAAAV;AAAA,CA1CA,CAAuBD;;eA4CRC","file":"Stack.js","sourcesContent":["var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nimport { Base } from \"../ContainerBase\";\nvar Stack = /** @class */ (function (_super) {\n    __extends(Stack, _super);\n    function Stack(container) {\n        if (container === void 0) { container = []; }\n        var _this = _super.call(this) || this;\n        /**\n         * @internal\n         */\n        _this._stack = [];\n        var self = _this;\n        container.forEach(function (el) {\n            self.push(el);\n        });\n        return _this;\n    }\n    Stack.prototype.clear = function () {\n        this._length = 0;\n        this._stack = [];\n    };\n    /**\n     * @description Insert element to stack's end.\n     * @description The element you want to push to the back.\n     * @returns The container length after erasing.\n     */\n    Stack.prototype.push = function (element) {\n        this._stack.push(element);\n        this._length += 1;\n        return this._length;\n    };\n    /**\n     * @description Removes the end element.\n     * @returns The element you popped.\n     */\n    Stack.prototype.pop = function () {\n        if (this._length === 0)\n            return;\n        this._length -= 1;\n        return this._stack.pop();\n    };\n    /**\n     * @description Accesses the end element.\n     * @returns The last element.\n     */\n    Stack.prototype.top = function () {\n        return this._stack[this._length - 1];\n    };\n    return Stack;\n}(Base));\nexport default Stack;\n","import { Base, initContainer } from '@/container/ContainerBase';\n\nclass Stack<T> extends Base {\n  /**\n   * @internal\n   */\n  private _stack: T[] = [];\n  constructor(container: initContainer<T> = []) {\n    super();\n    const self = this;\n    container.forEach(function (el) {\n      self.push(el);\n    });\n  }\n  clear() {\n    this._length = 0;\n    this._stack = [];\n  }\n  /**\n   * @description Insert element to stack's end.\n   * @description The element you want to push to the back.\n   * @returns The container length after erasing.\n   */\n  push(element: T) {\n    this._stack.push(element);\n    this._length += 1;\n    return this._length;\n  }\n  /**\n   * @description Removes the end element.\n   * @returns The element you popped.\n   */\n  pop() {\n    if (this._length === 0) return;\n    this._length -= 1;\n    return this._stack.pop();\n  }\n  /**\n   * @description Accesses the end element.\n   * @returns The last element.\n   */\n  top(): T | undefined {\n    return this._stack[this._length - 1];\n  }\n}\n\nexport default Stack;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/RandomIterator.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/RandomIterator.d.ts
new file mode 100644
index 0000000..f9480ee
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/RandomIterator.d.ts
@@ -0,0 +1,9 @@
+import { ContainerIterator } from "../../ContainerBase";
+import SequentialContainer from "./index";
+export declare abstract class RandomIterator<T> extends ContainerIterator<T> {
+    abstract readonly container: SequentialContainer<T>;
+    get pointer(): T;
+    set pointer(newValue: T);
+    pre(): this;
+    next(): this;
+}
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/RandomIterator.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/RandomIterator.js
new file mode 100644
index 0000000..cf0b824
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/RandomIterator.js
@@ -0,0 +1,78 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(t, r) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(t, r) {
+            t.__proto__ = r;
+        } || function(t, r) {
+            for (var n in r) if (Object.prototype.hasOwnProperty.call(r, n)) t[n] = r[n];
+        };
+        return extendStatics(t, r);
+    };
+    return function(t, r) {
+        if (typeof r !== "function" && r !== null) throw new TypeError("Class extends value " + String(r) + " is not a constructor or null");
+        extendStatics(t, r);
+        function __() {
+            this.constructor = t;
+        }
+        t.prototype = r === null ? Object.create(r) : (__.prototype = r.prototype, new __);
+    };
+}();
+
+import { ContainerIterator } from "../../ContainerBase";
+
+import { throwIteratorAccessError } from "../../../utils/throwError";
+
+var RandomIterator = function(t) {
+    __extends(RandomIterator, t);
+    function RandomIterator(r, n) {
+        var o = t.call(this, n) || this;
+        o.o = r;
+        if (o.iteratorType === 0) {
+            o.pre = function() {
+                if (this.o === 0) {
+                    throwIteratorAccessError();
+                }
+                this.o -= 1;
+                return this;
+            };
+            o.next = function() {
+                if (this.o === this.container.size()) {
+                    throwIteratorAccessError();
+                }
+                this.o += 1;
+                return this;
+            };
+        } else {
+            o.pre = function() {
+                if (this.o === this.container.size() - 1) {
+                    throwIteratorAccessError();
+                }
+                this.o += 1;
+                return this;
+            };
+            o.next = function() {
+                if (this.o === -1) {
+                    throwIteratorAccessError();
+                }
+                this.o -= 1;
+                return this;
+            };
+        }
+        return o;
+    }
+    Object.defineProperty(RandomIterator.prototype, "pointer", {
+        get: function() {
+            return this.container.getElementByPos(this.o);
+        },
+        set: function(t) {
+            this.container.setElementByPos(this.o, t);
+        },
+        enumerable: false,
+        configurable: true
+    });
+    return RandomIterator;
+}(ContainerIterator);
+
+export { RandomIterator };
+//# sourceMappingURL=RandomIterator.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/RandomIterator.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/RandomIterator.js.map
new file mode 100644
index 0000000..097cc94
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/RandomIterator.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/SequentialContainer/Base/RandomIterator.js","../../src/container/SequentialContainer/Base/RandomIterator.ts"],"names":["__extends","this","extendStatics","d","b","Object","setPrototypeOf","__proto__","Array","p","prototype","hasOwnProperty","call","TypeError","String","__","constructor","create","ContainerIterator","throwIteratorAccessError","RandomIterator","_super","index","iteratorType","_this","_node","pre","next","container","size","defineProperty","get","getElementByPos","set","newValue","setElementByPos","enumerable","configurable"],"mappings":"AAAA,IAAIA,YAAaC,QAAQA,KAAKD,KAAe;IACzC,IAAIE,gBAAgB,SAAUC,GAAGC;QAC7BF,gBAAgBG,OAAOC,kBAClB;YAAEC,WAAW;qBAAgBC,SAAS,SAAUL,GAAGC;YAAKD,EAAEI,YAAYH;AAAG,aAC1E,SAAUD,GAAGC;YAAK,KAAK,IAAIK,KAAKL,GAAG,IAAIC,OAAOK,UAAUC,eAAeC,KAAKR,GAAGK,IAAIN,EAAEM,KAAKL,EAAEK;AAAI;QACpG,OAAOP,cAAcC,GAAGC;AAC5B;IACA,OAAO,SAAUD,GAAGC;QAChB,WAAWA,MAAM,cAAcA,MAAM,MACjC,MAAM,IAAIS,UAAU,yBAAyBC,OAAOV,KAAK;QAC7DF,cAAcC,GAAGC;QACjB,SAASW;YAAOd,KAAKe,cAAcb;AAAG;QACtCA,EAAEO,YAAYN,MAAM,OAAOC,OAAOY,OAAOb,MAAMW,GAAGL,YAAYN,EAAEM,WAAW,IAAIK;AACnF;AACJ,CAd6C;;SCApCG,yBAAiC;;SAEjCC,gCAA0B;;AAEnC,IAAAC,iBAAA,SAAAC;IAAgDrB,UAAAoB,gBAAAC;IAS9C,SAAAD,eACEE,GACAC;QAFF,IAAAC,IAIEH,EAAAT,KAAAX,MAAMsB,MAAatB;QACnBuB,EAAKC,IAAQH;QACb,IAAIE,EAAKD,iBAAY,GAA0B;YAC7CC,EAAKE,MAAM;gBACT,IAAIzB,KAAKwB,MAAU,GAAG;oBACpBN;ADOM;gBCLRlB,KAAKwB,KAAS;gBACd,OAAOxB;ADOH;YCLNuB,EAAKG,OAAO;gBACV,IAAI1B,KAAKwB,MAAUxB,KAAK2B,UAAUC,QAAQ;oBACxCV;ADOM;gBCLRlB,KAAKwB,KAAS;gBACd,OAAOxB;ADOH;AACJ,eCNG;YACLuB,EAAKE,MAAM;gBACT,IAAIzB,KAAKwB,MAAUxB,KAAK2B,UAAUC,SAAS,GAAG;oBAC5CV;ADQM;gBCNRlB,KAAKwB,KAAS;gBACd,OAAOxB;ADQH;YCNNuB,EAAKG,OAAO;gBACV,IAAI1B,KAAKwB,OAAW,GAAG;oBACrBN;ADQM;gBCNRlB,KAAKwB,KAAS;gBACd,OAAOxB;ADQH;AACJ;QACA,OAAOuB;AACX;ICPFnB,OAAAyB,eAAIV,eAAAV,WAAA,WAAO;QDSLqB,KCTN;YACE,OAAO9B,KAAK2B,UAAUI,gBAAgB/B,KAAKwB;ADUvC;QACAQ,KCTN,SAAYC;YACVjC,KAAK2B,UAAUO,gBAAgBlC,KAAKwB,GAAOS;ADUvC;QACAE,YAAY;QACZC,cAAc;;ICNtB,OAAAjB;AAAA,CAzDA,CAAgDF;;SDmEvCE","file":"RandomIterator.js","sourcesContent":["var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nimport { ContainerIterator } from \"../../ContainerBase\";\nimport { throwIteratorAccessError } from \"../../../utils/throwError\";\nvar RandomIterator = /** @class */ (function (_super) {\n    __extends(RandomIterator, _super);\n    /**\n     * @internal\n     */\n    function RandomIterator(index, iteratorType) {\n        var _this = _super.call(this, iteratorType) || this;\n        _this._node = index;\n        if (_this.iteratorType === 0 /* IteratorType.NORMAL */) {\n            _this.pre = function () {\n                if (this._node === 0) {\n                    throwIteratorAccessError();\n                }\n                this._node -= 1;\n                return this;\n            };\n            _this.next = function () {\n                if (this._node === this.container.size()) {\n                    throwIteratorAccessError();\n                }\n                this._node += 1;\n                return this;\n            };\n        }\n        else {\n            _this.pre = function () {\n                if (this._node === this.container.size() - 1) {\n                    throwIteratorAccessError();\n                }\n                this._node += 1;\n                return this;\n            };\n            _this.next = function () {\n                if (this._node === -1) {\n                    throwIteratorAccessError();\n                }\n                this._node -= 1;\n                return this;\n            };\n        }\n        return _this;\n    }\n    Object.defineProperty(RandomIterator.prototype, \"pointer\", {\n        get: function () {\n            return this.container.getElementByPos(this._node);\n        },\n        set: function (newValue) {\n            this.container.setElementByPos(this._node, newValue);\n        },\n        enumerable: false,\n        configurable: true\n    });\n    return RandomIterator;\n}(ContainerIterator));\nexport { RandomIterator };\n","import { ContainerIterator, IteratorType } from '@/container/ContainerBase';\nimport SequentialContainer from '@/container/SequentialContainer/Base/index';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nexport abstract class RandomIterator<T> extends ContainerIterator<T> {\n  abstract readonly container: SequentialContainer<T>;\n  /**\n   * @internal\n   */\n  _node: number;\n  /**\n   * @internal\n   */\n  protected constructor(\n    index: number,\n    iteratorType?: IteratorType\n  ) {\n    super(iteratorType);\n    this._node = index;\n    if (this.iteratorType === IteratorType.NORMAL) {\n      this.pre = function () {\n        if (this._node === 0) {\n          throwIteratorAccessError();\n        }\n        this._node -= 1;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === this.container.size()) {\n          throwIteratorAccessError();\n        }\n        this._node += 1;\n        return this;\n      };\n    } else {\n      this.pre = function () {\n        if (this._node === this.container.size() - 1) {\n          throwIteratorAccessError();\n        }\n        this._node += 1;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === -1) {\n          throwIteratorAccessError();\n        }\n        this._node -= 1;\n        return this;\n      };\n    }\n  }\n  get pointer() {\n    return this.container.getElementByPos(this._node);\n  }\n  set pointer(newValue: T) {\n    this.container.setElementByPos(this._node, newValue);\n  }\n  // @ts-ignore\n  pre(): this;\n  // @ts-ignore\n  next(): this;\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/index.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/index.d.ts
new file mode 100644
index 0000000..c1b4097
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/index.d.ts
@@ -0,0 +1,67 @@
+import { Container } from "../../ContainerBase";
+declare abstract class SequentialContainer<T> extends Container<T> {
+    /**
+     * @description Push the element to the back.
+     * @param element - The element you want to push.
+     * @returns The size of container after pushing.
+     */
+    abstract pushBack(element: T): number;
+    /**
+     * @description Removes the last element.
+     * @returns The element you popped.
+     */
+    abstract popBack(): T | undefined;
+    /**
+     * @description Sets element by position.
+     * @param pos - The position you want to change.
+     * @param element - The element's value you want to update.
+     * @example
+     * container.setElementByPos(-1, 1); // throw a RangeError
+     */
+    abstract setElementByPos(pos: number, element: T): void;
+    /**
+     * @description Removes the elements of the specified value.
+     * @param value - The value you want to remove.
+     * @returns The size of container after erasing.
+     * @example
+     * container.eraseElementByValue(-1);
+     */
+    abstract eraseElementByValue(value: T): number;
+    /**
+     * @description Insert several elements after the specified position.
+     * @param pos - The position you want to insert.
+     * @param element - The element you want to insert.
+     * @param num - The number of elements you want to insert (default 1).
+     * @returns The size of container after inserting.
+     * @example
+     * const container = new Vector([1, 2, 3]);
+     * container.insert(1, 4);  // [1, 4, 2, 3]
+     * container.insert(1, 5, 3); // [1, 5, 5, 5, 4, 2, 3]
+     */
+    abstract insert(pos: number, element: T, num?: number): number;
+    /**
+     * @description Reverses the container.
+     * @example
+     * const container = new Vector([1, 2, 3]);
+     * container.reverse(); // [3, 2, 1]
+     */
+    abstract reverse(): void;
+    /**
+     * @description Removes the duplication of elements in the container.
+     * @returns The size of container after inserting.
+     * @example
+     * const container = new Vector([1, 1, 3, 2, 2, 5, 5, 2]);
+     * container.unique(); // [1, 3, 2, 5, 2]
+     */
+    abstract unique(): number;
+    /**
+     * @description Sort the container.
+     * @param cmp - Comparison function to sort.
+     * @example
+     * const container = new Vector([3, 1, 10]);
+     * container.sort();  // [1, 10, 3]
+     * container.sort((x, y) => x - y); // [1, 3, 10]
+     */
+    abstract sort(cmp?: (x: T, y: T) => number): void;
+}
+export default SequentialContainer;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/index.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/index.js
new file mode 100644
index 0000000..8ac697b
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/index.js
@@ -0,0 +1,33 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(n, t) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(n, t) {
+            n.__proto__ = t;
+        } || function(n, t) {
+            for (var e in t) if (Object.prototype.hasOwnProperty.call(t, e)) n[e] = t[e];
+        };
+        return extendStatics(n, t);
+    };
+    return function(n, t) {
+        if (typeof t !== "function" && t !== null) throw new TypeError("Class extends value " + String(t) + " is not a constructor or null");
+        extendStatics(n, t);
+        function __() {
+            this.constructor = n;
+        }
+        n.prototype = t === null ? Object.create(t) : (__.prototype = t.prototype, new __);
+    };
+}();
+
+import { Container } from "../../ContainerBase";
+
+var SequentialContainer = function(n) {
+    __extends(SequentialContainer, n);
+    function SequentialContainer() {
+        return n !== null && n.apply(this, arguments) || this;
+    }
+    return SequentialContainer;
+}(Container);
+
+export default SequentialContainer;
+//# sourceMappingURL=index.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/index.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/index.js.map
new file mode 100644
index 0000000..36e2c5a
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Base/index.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/SequentialContainer/Base/index.js","../../src/container/SequentialContainer/Base/index.ts"],"names":["__extends","this","extendStatics","d","b","Object","setPrototypeOf","__proto__","Array","p","prototype","hasOwnProperty","call","TypeError","String","__","constructor","create","Container","SequentialContainer","_super","apply","arguments"],"mappings":"AAAA,IAAIA,YAAaC,QAAQA,KAAKD,KAAe;IACzC,IAAIE,gBAAgB,SAAUC,GAAGC;QAC7BF,gBAAgBG,OAAOC,kBAClB;YAAEC,WAAW;qBAAgBC,SAAS,SAAUL,GAAGC;YAAKD,EAAEI,YAAYH;AAAG,aAC1E,SAAUD,GAAGC;YAAK,KAAK,IAAIK,KAAKL,GAAG,IAAIC,OAAOK,UAAUC,eAAeC,KAAKR,GAAGK,IAAIN,EAAEM,KAAKL,EAAEK;AAAI;QACpG,OAAOP,cAAcC,GAAGC;AAC5B;IACA,OAAO,SAAUD,GAAGC;QAChB,WAAWA,MAAM,cAAcA,MAAM,MACjC,MAAM,IAAIS,UAAU,yBAAyBC,OAAOV,KAAK;QAC7DF,cAAcC,GAAGC;QACjB,SAASW;YAAOd,KAAKe,cAAcb;AAAG;QACtCA,EAAEO,YAAYN,MAAM,OAAOC,OAAOY,OAAOb,MAAMW,GAAGL,YAAYN,EAAEM,WAAW,IAAIK;AACnF;AACJ,CAd6C;;SCApCG,iBAAW;;AAEpB,IAAAC,sBAAA,SAAAC;IAA8CpB,UAAAmB,qBAAAC;IAA9C,SAAAD;QDiBQ,OAAOC,MAAW,QAAQA,EAAOC,MAAMpB,MAAMqB,cAAcrB;AC+CnE;IAAA,OAAAkB;AAAA,CAhEA,CAA8CD;;eAkE/BC","file":"index.js","sourcesContent":["var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nimport { Container } from \"../../ContainerBase\";\nvar SequentialContainer = /** @class */ (function (_super) {\n    __extends(SequentialContainer, _super);\n    function SequentialContainer() {\n        return _super !== null && _super.apply(this, arguments) || this;\n    }\n    return SequentialContainer;\n}(Container));\nexport default SequentialContainer;\n","import { Container } from '@/container/ContainerBase';\n\nabstract class SequentialContainer<T> extends Container<T> {\n  /**\n   * @description Push the element to the back.\n   * @param element - The element you want to push.\n   * @returns The size of container after pushing.\n   */\n  abstract pushBack(element: T): number;\n  /**\n   * @description Removes the last element.\n   * @returns The element you popped.\n   */\n  abstract popBack(): T | undefined;\n  /**\n   * @description Sets element by position.\n   * @param pos - The position you want to change.\n   * @param element - The element's value you want to update.\n   * @example\n   * container.setElementByPos(-1, 1); // throw a RangeError\n   */\n  abstract setElementByPos(pos: number, element: T): void;\n  /**\n   * @description Removes the elements of the specified value.\n   * @param value - The value you want to remove.\n   * @returns The size of container after erasing.\n   * @example\n   * container.eraseElementByValue(-1);\n   */\n  abstract eraseElementByValue(value: T): number;\n  /**\n   * @description Insert several elements after the specified position.\n   * @param pos - The position you want to insert.\n   * @param element - The element you want to insert.\n   * @param num - The number of elements you want to insert (default 1).\n   * @returns The size of container after inserting.\n   * @example\n   * const container = new Vector([1, 2, 3]);\n   * container.insert(1, 4);  // [1, 4, 2, 3]\n   * container.insert(1, 5, 3); // [1, 5, 5, 5, 4, 2, 3]\n   */\n  abstract insert(pos: number, element: T, num?: number): number;\n  /**\n   * @description Reverses the container.\n   * @example\n   * const container = new Vector([1, 2, 3]);\n   * container.reverse(); // [3, 2, 1]\n   */\n  abstract reverse(): void;\n  /**\n   * @description Removes the duplication of elements in the container.\n   * @returns The size of container after inserting.\n   * @example\n   * const container = new Vector([1, 1, 3, 2, 2, 5, 5, 2]);\n   * container.unique(); // [1, 3, 2, 5, 2]\n   */\n  abstract unique(): number;\n  /**\n   * @description Sort the container.\n   * @param cmp - Comparison function to sort.\n   * @example\n   * const container = new Vector([3, 1, 10]);\n   * container.sort();  // [1, 10, 3]\n   * container.sort((x, y) => x - y); // [1, 3, 10]\n   */\n  abstract sort(cmp?: (x: T, y: T) => number): void;\n}\n\nexport default SequentialContainer;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Deque.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Deque.d.ts
new file mode 100644
index 0000000..cf63bda
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Deque.d.ts
@@ -0,0 +1,58 @@
+import SequentialContainer from './Base';
+import { IteratorType, initContainer } from "../ContainerBase";
+import { RandomIterator } from "./Base/RandomIterator";
+declare class DequeIterator<T> extends RandomIterator<T> {
+    readonly container: Deque<T>;
+    constructor(node: number, container: Deque<T>, iteratorType?: IteratorType);
+    copy(): DequeIterator<T>;
+    equals(iter: DequeIterator<T>): boolean;
+}
+export type { DequeIterator };
+declare class Deque<T> extends SequentialContainer<T> {
+    constructor(container?: initContainer<T>, _bucketSize?: number);
+    clear(): void;
+    begin(): DequeIterator<T>;
+    end(): DequeIterator<T>;
+    rBegin(): DequeIterator<T>;
+    rEnd(): DequeIterator<T>;
+    front(): T | undefined;
+    back(): T | undefined;
+    pushBack(element: T): number;
+    popBack(): T | undefined;
+    /**
+     * @description Push the element to the front.
+     * @param element - The element you want to push.
+     * @returns The size of queue after pushing.
+     */
+    pushFront(element: T): number;
+    /**
+     * @description Remove the _first element.
+     * @returns The element you popped.
+     */
+    popFront(): T | undefined;
+    getElementByPos(pos: number): T;
+    setElementByPos(pos: number, element: T): void;
+    insert(pos: number, element: T, num?: number): number;
+    /**
+     * @description Remove all elements after the specified position (excluding the specified position).
+     * @param pos - The previous position of the first removed element.
+     * @returns The size of the container after cutting.
+     * @example
+     * deque.cut(1); // Then deque's size will be 2. deque -> [0, 1]
+     */
+    cut(pos: number): number;
+    eraseElementByPos(pos: number): number;
+    eraseElementByValue(value: T): number;
+    eraseElementByIterator(iter: DequeIterator<T>): DequeIterator<T>;
+    find(element: T): DequeIterator<T>;
+    reverse(): void;
+    unique(): number;
+    sort(cmp?: (x: T, y: T) => number): void;
+    /**
+     * @description Remove as much useless space as possible.
+     */
+    shrinkToFit(): void;
+    forEach(callback: (element: T, index: number, deque: Deque<T>) => void): void;
+    [Symbol.iterator](): Generator<T, void, unknown>;
+}
+export default Deque;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Deque.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Deque.js
new file mode 100644
index 0000000..7020e00
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Deque.js
@@ -0,0 +1,498 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(t, i) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(t, i) {
+            t.__proto__ = i;
+        } || function(t, i) {
+            for (var r in i) if (Object.prototype.hasOwnProperty.call(i, r)) t[r] = i[r];
+        };
+        return extendStatics(t, i);
+    };
+    return function(t, i) {
+        if (typeof i !== "function" && i !== null) throw new TypeError("Class extends value " + String(i) + " is not a constructor or null");
+        extendStatics(t, i);
+        function __() {
+            this.constructor = t;
+        }
+        t.prototype = i === null ? Object.create(i) : (__.prototype = i.prototype, new __);
+    };
+}();
+
+var __generator = this && this.i || function(t, i) {
+    var r = {
+        label: 0,
+        sent: function() {
+            if (h[0] & 1) throw h[1];
+            return h[1];
+        },
+        trys: [],
+        ops: []
+    }, e, s, h, n;
+    return n = {
+        next: verb(0),
+        throw: verb(1),
+        return: verb(2)
+    }, typeof Symbol === "function" && (n[Symbol.iterator] = function() {
+        return this;
+    }), n;
+    function verb(t) {
+        return function(i) {
+            return step([ t, i ]);
+        };
+    }
+    function step(n) {
+        if (e) throw new TypeError("Generator is already executing.");
+        while (r) try {
+            if (e = 1, s && (h = n[0] & 2 ? s["return"] : n[0] ? s["throw"] || ((h = s["return"]) && h.call(s), 
+            0) : s.next) && !(h = h.call(s, n[1])).done) return h;
+            if (s = 0, h) n = [ n[0] & 2, h.value ];
+            switch (n[0]) {
+              case 0:
+              case 1:
+                h = n;
+                break;
+
+              case 4:
+                r.label++;
+                return {
+                    value: n[1],
+                    done: false
+                };
+
+              case 5:
+                r.label++;
+                s = n[1];
+                n = [ 0 ];
+                continue;
+
+              case 7:
+                n = r.ops.pop();
+                r.trys.pop();
+                continue;
+
+              default:
+                if (!(h = r.trys, h = h.length > 0 && h[h.length - 1]) && (n[0] === 6 || n[0] === 2)) {
+                    r = 0;
+                    continue;
+                }
+                if (n[0] === 3 && (!h || n[1] > h[0] && n[1] < h[3])) {
+                    r.label = n[1];
+                    break;
+                }
+                if (n[0] === 6 && r.label < h[1]) {
+                    r.label = h[1];
+                    h = n;
+                    break;
+                }
+                if (h && r.label < h[2]) {
+                    r.label = h[2];
+                    r.ops.push(n);
+                    break;
+                }
+                if (h[2]) r.ops.pop();
+                r.trys.pop();
+                continue;
+            }
+            n = i.call(t, r);
+        } catch (t) {
+            n = [ 6, t ];
+            s = 0;
+        } finally {
+            e = h = 0;
+        }
+        if (n[0] & 5) throw n[1];
+        return {
+            value: n[0] ? n[1] : void 0,
+            done: true
+        };
+    }
+};
+
+var __read = this && this.q || function(t, i) {
+    var r = typeof Symbol === "function" && t[Symbol.iterator];
+    if (!r) return t;
+    var e = r.call(t), s, h = [], n;
+    try {
+        while ((i === void 0 || i-- > 0) && !(s = e.next()).done) h.push(s.value);
+    } catch (t) {
+        n = {
+            error: t
+        };
+    } finally {
+        try {
+            if (s && !s.done && (r = e["return"])) r.call(e);
+        } finally {
+            if (n) throw n.error;
+        }
+    }
+    return h;
+};
+
+var __spreadArray = this && this.D || function(t, i, r) {
+    if (r || arguments.length === 2) for (var e = 0, s = i.length, h; e < s; e++) {
+        if (h || !(e in i)) {
+            if (!h) h = Array.prototype.slice.call(i, 0, e);
+            h[e] = i[e];
+        }
+    }
+    return t.concat(h || Array.prototype.slice.call(i));
+};
+
+import SequentialContainer from "./Base";
+
+import { RandomIterator } from "./Base/RandomIterator";
+
+var DequeIterator = function(t) {
+    __extends(DequeIterator, t);
+    function DequeIterator(i, r, e) {
+        var s = t.call(this, i, e) || this;
+        s.container = r;
+        return s;
+    }
+    DequeIterator.prototype.copy = function() {
+        return new DequeIterator(this.o, this.container, this.iteratorType);
+    };
+    return DequeIterator;
+}(RandomIterator);
+
+var Deque = function(t) {
+    __extends(Deque, t);
+    function Deque(i, r) {
+        if (i === void 0) {
+            i = [];
+        }
+        if (r === void 0) {
+            r = 1 << 12;
+        }
+        var e = t.call(this) || this;
+        e.A = 0;
+        e.S = 0;
+        e.R = 0;
+        e.k = 0;
+        e.C = 0;
+        e.j = [];
+        var s = function() {
+            if (typeof i.length === "number") return i.length;
+            if (typeof i.size === "number") return i.size;
+            if (typeof i.size === "function") return i.size();
+            throw new TypeError("Cannot get the length or size of the container");
+        }();
+        e.B = r;
+        e.C = Math.max(Math.ceil(s / e.B), 1);
+        for (var h = 0; h < e.C; ++h) {
+            e.j.push(new Array(e.B));
+        }
+        var n = Math.ceil(s / e.B);
+        e.A = e.R = (e.C >> 1) - (n >> 1);
+        e.S = e.k = e.B - s % e.B >> 1;
+        var u = e;
+        i.forEach((function(t) {
+            u.pushBack(t);
+        }));
+        return e;
+    }
+    Deque.prototype.O = function() {
+        var t = [];
+        var i = Math.max(this.C >> 1, 1);
+        for (var r = 0; r < i; ++r) {
+            t[r] = new Array(this.B);
+        }
+        for (var r = this.A; r < this.C; ++r) {
+            t[t.length] = this.j[r];
+        }
+        for (var r = 0; r < this.R; ++r) {
+            t[t.length] = this.j[r];
+        }
+        t[t.length] = __spreadArray([], __read(this.j[this.R]), false);
+        this.A = i;
+        this.R = t.length - 1;
+        for (var r = 0; r < i; ++r) {
+            t[t.length] = new Array(this.B);
+        }
+        this.j = t;
+        this.C = t.length;
+    };
+    Deque.prototype.T = function(t) {
+        var i = this.S + t + 1;
+        var r = i % this.B;
+        var e = r - 1;
+        var s = this.A + (i - r) / this.B;
+        if (r === 0) s -= 1;
+        s %= this.C;
+        if (e < 0) e += this.B;
+        return {
+            curNodeBucketIndex: s,
+            curNodePointerIndex: e
+        };
+    };
+    Deque.prototype.clear = function() {
+        this.j = [ new Array(this.B) ];
+        this.C = 1;
+        this.A = this.R = this.M = 0;
+        this.S = this.k = this.B >> 1;
+    };
+    Deque.prototype.begin = function() {
+        return new DequeIterator(0, this);
+    };
+    Deque.prototype.end = function() {
+        return new DequeIterator(this.M, this);
+    };
+    Deque.prototype.rBegin = function() {
+        return new DequeIterator(this.M - 1, this, 1);
+    };
+    Deque.prototype.rEnd = function() {
+        return new DequeIterator(-1, this, 1);
+    };
+    Deque.prototype.front = function() {
+        if (this.M === 0) return;
+        return this.j[this.A][this.S];
+    };
+    Deque.prototype.back = function() {
+        if (this.M === 0) return;
+        return this.j[this.R][this.k];
+    };
+    Deque.prototype.pushBack = function(t) {
+        if (this.M) {
+            if (this.k < this.B - 1) {
+                this.k += 1;
+            } else if (this.R < this.C - 1) {
+                this.R += 1;
+                this.k = 0;
+            } else {
+                this.R = 0;
+                this.k = 0;
+            }
+            if (this.R === this.A && this.k === this.S) this.O();
+        }
+        this.M += 1;
+        this.j[this.R][this.k] = t;
+        return this.M;
+    };
+    Deque.prototype.popBack = function() {
+        if (this.M === 0) return;
+        var t = this.j[this.R][this.k];
+        if (this.M !== 1) {
+            if (this.k > 0) {
+                this.k -= 1;
+            } else if (this.R > 0) {
+                this.R -= 1;
+                this.k = this.B - 1;
+            } else {
+                this.R = this.C - 1;
+                this.k = this.B - 1;
+            }
+        }
+        this.M -= 1;
+        return t;
+    };
+    Deque.prototype.pushFront = function(t) {
+        if (this.M) {
+            if (this.S > 0) {
+                this.S -= 1;
+            } else if (this.A > 0) {
+                this.A -= 1;
+                this.S = this.B - 1;
+            } else {
+                this.A = this.C - 1;
+                this.S = this.B - 1;
+            }
+            if (this.A === this.R && this.S === this.k) this.O();
+        }
+        this.M += 1;
+        this.j[this.A][this.S] = t;
+        return this.M;
+    };
+    Deque.prototype.popFront = function() {
+        if (this.M === 0) return;
+        var t = this.j[this.A][this.S];
+        if (this.M !== 1) {
+            if (this.S < this.B - 1) {
+                this.S += 1;
+            } else if (this.A < this.C - 1) {
+                this.A += 1;
+                this.S = 0;
+            } else {
+                this.A = 0;
+                this.S = 0;
+            }
+        }
+        this.M -= 1;
+        return t;
+    };
+    Deque.prototype.getElementByPos = function(t) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        var i = this.T(t), r = i.curNodeBucketIndex, e = i.curNodePointerIndex;
+        return this.j[r][e];
+    };
+    Deque.prototype.setElementByPos = function(t, i) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        var r = this.T(t), e = r.curNodeBucketIndex, s = r.curNodePointerIndex;
+        this.j[e][s] = i;
+    };
+    Deque.prototype.insert = function(t, i, r) {
+        if (r === void 0) {
+            r = 1;
+        }
+        if (t < 0 || t > this.M) {
+            throw new RangeError;
+        }
+        if (t === 0) {
+            while (r--) this.pushFront(i);
+        } else if (t === this.M) {
+            while (r--) this.pushBack(i);
+        } else {
+            var e = [];
+            for (var s = t; s < this.M; ++s) {
+                e.push(this.getElementByPos(s));
+            }
+            this.cut(t - 1);
+            for (var s = 0; s < r; ++s) this.pushBack(i);
+            for (var s = 0; s < e.length; ++s) this.pushBack(e[s]);
+        }
+        return this.M;
+    };
+    Deque.prototype.cut = function(t) {
+        if (t < 0) {
+            this.clear();
+            return 0;
+        }
+        var i = this.T(t), r = i.curNodeBucketIndex, e = i.curNodePointerIndex;
+        this.R = r;
+        this.k = e;
+        this.M = t + 1;
+        return this.M;
+    };
+    Deque.prototype.eraseElementByPos = function(t) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        if (t === 0) this.popFront(); else if (t === this.M - 1) this.popBack(); else {
+            var i = [];
+            for (var r = t + 1; r < this.M; ++r) {
+                i.push(this.getElementByPos(r));
+            }
+            this.cut(t);
+            this.popBack();
+            var e = this;
+            i.forEach((function(t) {
+                e.pushBack(t);
+            }));
+        }
+        return this.M;
+    };
+    Deque.prototype.eraseElementByValue = function(t) {
+        if (this.M === 0) return 0;
+        var i = [];
+        for (var r = 0; r < this.M; ++r) {
+            var e = this.getElementByPos(r);
+            if (e !== t) i.push(e);
+        }
+        var s = i.length;
+        for (var r = 0; r < s; ++r) this.setElementByPos(r, i[r]);
+        return this.cut(s - 1);
+    };
+    Deque.prototype.eraseElementByIterator = function(t) {
+        var i = t.o;
+        this.eraseElementByPos(i);
+        t = t.next();
+        return t;
+    };
+    Deque.prototype.find = function(t) {
+        for (var i = 0; i < this.M; ++i) {
+            if (this.getElementByPos(i) === t) {
+                return new DequeIterator(i, this);
+            }
+        }
+        return this.end();
+    };
+    Deque.prototype.reverse = function() {
+        var t = 0;
+        var i = this.M - 1;
+        while (t < i) {
+            var r = this.getElementByPos(t);
+            this.setElementByPos(t, this.getElementByPos(i));
+            this.setElementByPos(i, r);
+            t += 1;
+            i -= 1;
+        }
+    };
+    Deque.prototype.unique = function() {
+        if (this.M <= 1) {
+            return this.M;
+        }
+        var t = 1;
+        var i = this.getElementByPos(0);
+        for (var r = 1; r < this.M; ++r) {
+            var e = this.getElementByPos(r);
+            if (e !== i) {
+                i = e;
+                this.setElementByPos(t++, e);
+            }
+        }
+        while (this.M > t) this.popBack();
+        return this.M;
+    };
+    Deque.prototype.sort = function(t) {
+        var i = [];
+        for (var r = 0; r < this.M; ++r) {
+            i.push(this.getElementByPos(r));
+        }
+        i.sort(t);
+        for (var r = 0; r < this.M; ++r) this.setElementByPos(r, i[r]);
+    };
+    Deque.prototype.shrinkToFit = function() {
+        if (this.M === 0) return;
+        var t = [];
+        this.forEach((function(i) {
+            t.push(i);
+        }));
+        this.C = Math.max(Math.ceil(this.M / this.B), 1);
+        this.M = this.A = this.R = this.S = this.k = 0;
+        this.j = [];
+        for (var i = 0; i < this.C; ++i) {
+            this.j.push(new Array(this.B));
+        }
+        for (var i = 0; i < t.length; ++i) this.pushBack(t[i]);
+    };
+    Deque.prototype.forEach = function(t) {
+        for (var i = 0; i < this.M; ++i) {
+            t(this.getElementByPos(i), i, this);
+        }
+    };
+    Deque.prototype[Symbol.iterator] = function() {
+        return function() {
+            var t;
+            return __generator(this, (function(i) {
+                switch (i.label) {
+                  case 0:
+                    t = 0;
+                    i.label = 1;
+
+                  case 1:
+                    if (!(t < this.M)) return [ 3, 4 ];
+                    return [ 4, this.getElementByPos(t) ];
+
+                  case 2:
+                    i.sent();
+                    i.label = 3;
+
+                  case 3:
+                    ++t;
+                    return [ 3, 1 ];
+
+                  case 4:
+                    return [ 2 ];
+                }
+            }));
+        }.bind(this)();
+    };
+    return Deque;
+}(SequentialContainer);
+
+export default Deque;
+//# sourceMappingURL=Deque.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Deque.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Deque.js.map
new file mode 100644
index 0000000..7ab3c11
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Deque.js.map
@@ -0,0 +1 @@
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\"function\" && o[Symbol.iterator];\n    if (!m) return o;\n    var i = m.call(o), r, ar = [], e;\n    try {\n        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\n    }\n    catch (error) { e = { error: error }; }\n    finally {\n        try {\n            if (r && !r.done && (m = i[\"return\"])) m.call(i);\n        }\n        finally { if (e) throw e.error; }\n    }\n    return ar;\n};\nvar __spreadArray = (this && this.__spreadArray) || function (to, from, pack) {\n    if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {\n        if (ar || !(i in from)) {\n            if (!ar) ar = Array.prototype.slice.call(from, 0, i);\n            ar[i] = from[i];\n        }\n    }\n    return to.concat(ar || Array.prototype.slice.call(from));\n};\nimport SequentialContainer from './Base';\nimport { RandomIterator } from \"./Base/RandomIterator\";\nimport $checkWithinAccessParams from \"../../utils/checkParams.macro\";\nimport $getContainerSize from \"../../utils/getContainerSize.macro\";\nvar DequeIterator = /** @class */ (function (_super) {\n    __extends(DequeIterator, _super);\n    function DequeIterator(node, container, iteratorType) {\n        var _this = _super.call(this, node, iteratorType) || this;\n        _this.container = container;\n        return _this;\n    }\n    DequeIterator.prototype.copy = function () {\n        return new DequeIterator(this._node, this.container, this.iteratorType);\n    };\n    return DequeIterator;\n}(RandomIterator));\nvar Deque = /** @class */ (function (_super) {\n    __extends(Deque, _super);\n    function Deque(container, _bucketSize) {\n        if (container === void 0) { container = []; }\n        if (_bucketSize === void 0) { _bucketSize = (1 << 12); }\n        var _this = _super.call(this) || this;\n        /**\n         * @internal\n         */\n        _this._first = 0;\n        /**\n         * @internal\n         */\n        _this._curFirst = 0;\n        /**\n         * @internal\n         */\n        _this._last = 0;\n        /**\n         * @internal\n         */\n        _this._curLast = 0;\n        /**\n         * @internal\n         */\n        _this._bucketNum = 0;\n        /**\n         * @internal\n         */\n        _this._map = [];\n        var _length = (function () {\n            if (typeof container.length === \"number\")\n                return container.length;\n            if (typeof container.size === \"number\")\n                return container.size;\n            if (typeof container.size === \"function\")\n                return container.size();\n            throw new TypeError(\"Cannot get the length or size of the container\");\n        })();\n        _this._bucketSize = _bucketSize;\n        _this._bucketNum = Math.max(Math.ceil(_length / _this._bucketSize), 1);\n        for (var i = 0; i < _this._bucketNum; ++i) {\n            _this._map.push(new Array(_this._bucketSize));\n        }\n        var needBucketNum = Math.ceil(_length / _this._bucketSize);\n        _this._first = _this._last = (_this._bucketNum >> 1) - (needBucketNum >> 1);\n        _this._curFirst = _this._curLast = (_this._bucketSize - _length % _this._bucketSize) >> 1;\n        var self = _this;\n        container.forEach(function (element) {\n            self.pushBack(element);\n        });\n        return _this;\n    }\n    /**\n     * @description Growth the Deque.\n     * @internal\n     */\n    Deque.prototype._reAllocate = function () {\n        var newMap = [];\n        var addBucketNum = Math.max(this._bucketNum >> 1, 1);\n        for (var i = 0; i < addBucketNum; ++i) {\n            newMap[i] = new Array(this._bucketSize);\n        }\n        for (var i = this._first; i < this._bucketNum; ++i) {\n            newMap[newMap.length] = this._map[i];\n        }\n        for (var i = 0; i < this._last; ++i) {\n            newMap[newMap.length] = this._map[i];\n        }\n        newMap[newMap.length] = __spreadArray([], __read(this._map[this._last]), false);\n        this._first = addBucketNum;\n        this._last = newMap.length - 1;\n        for (var i = 0; i < addBucketNum; ++i) {\n            newMap[newMap.length] = new Array(this._bucketSize);\n        }\n        this._map = newMap;\n        this._bucketNum = newMap.length;\n    };\n    /**\n     * @description Get the bucket position of the element and the pointer position by index.\n     * @param pos - The element's index.\n     * @internal\n     */\n    Deque.prototype._getElementIndex = function (pos) {\n        var offset = this._curFirst + pos + 1;\n        var offsetRemainder = offset % this._bucketSize;\n        var curNodePointerIndex = offsetRemainder - 1;\n        var curNodeBucketIndex = this._first + (offset - offsetRemainder) / this._bucketSize;\n        if (offsetRemainder === 0)\n            curNodeBucketIndex -= 1;\n        curNodeBucketIndex %= this._bucketNum;\n        if (curNodePointerIndex < 0)\n            curNodePointerIndex += this._bucketSize;\n        return { curNodeBucketIndex: curNodeBucketIndex, curNodePointerIndex: curNodePointerIndex };\n    };\n    Deque.prototype.clear = function () {\n        this._map = [new Array(this._bucketSize)];\n        this._bucketNum = 1;\n        this._first = this._last = this._length = 0;\n        this._curFirst = this._curLast = this._bucketSize >> 1;\n    };\n    Deque.prototype.begin = function () {\n        return new DequeIterator(0, this);\n    };\n    Deque.prototype.end = function () {\n        return new DequeIterator(this._length, this);\n    };\n    Deque.prototype.rBegin = function () {\n        return new DequeIterator(this._length - 1, this, 1 /* IteratorType.REVERSE */);\n    };\n    Deque.prototype.rEnd = function () {\n        return new DequeIterator(-1, this, 1 /* IteratorType.REVERSE */);\n    };\n    Deque.prototype.front = function () {\n        if (this._length === 0)\n            return;\n        return this._map[this._first][this._curFirst];\n    };\n    Deque.prototype.back = function () {\n        if (this._length === 0)\n            return;\n        return this._map[this._last][this._curLast];\n    };\n    Deque.prototype.pushBack = function (element) {\n        if (this._length) {\n            if (this._curLast < this._bucketSize - 1) {\n                this._curLast += 1;\n            }\n            else if (this._last < this._bucketNum - 1) {\n                this._last += 1;\n                this._curLast = 0;\n            }\n            else {\n                this._last = 0;\n                this._curLast = 0;\n            }\n            if (this._last === this._first &&\n                this._curLast === this._curFirst)\n                this._reAllocate();\n        }\n        this._length += 1;\n        this._map[this._last][this._curLast] = element;\n        return this._length;\n    };\n    Deque.prototype.popBack = function () {\n        if (this._length === 0)\n            return;\n        var value = this._map[this._last][this._curLast];\n        if (this._length !== 1) {\n            if (this._curLast > 0) {\n                this._curLast -= 1;\n            }\n            else if (this._last > 0) {\n                this._last -= 1;\n                this._curLast = this._bucketSize - 1;\n            }\n            else {\n                this._last = this._bucketNum - 1;\n                this._curLast = this._bucketSize - 1;\n            }\n        }\n        this._length -= 1;\n        return value;\n    };\n    /**\n     * @description Push the element to the front.\n     * @param element - The element you want to push.\n     * @returns The size of queue after pushing.\n     */\n    Deque.prototype.pushFront = function (element) {\n        if (this._length) {\n            if (this._curFirst > 0) {\n                this._curFirst -= 1;\n            }\n            else if (this._first > 0) {\n                this._first -= 1;\n                this._curFirst = this._bucketSize - 1;\n            }\n            else {\n                this._first = this._bucketNum - 1;\n                this._curFirst = this._bucketSize - 1;\n            }\n            if (this._first === this._last &&\n                this._curFirst === this._curLast)\n                this._reAllocate();\n        }\n        this._length += 1;\n        this._map[this._first][this._curFirst] = element;\n        return this._length;\n    };\n    /**\n     * @description Remove the _first element.\n     * @returns The element you popped.\n     */\n    Deque.prototype.popFront = function () {\n        if (this._length === 0)\n            return;\n        var value = this._map[this._first][this._curFirst];\n        if (this._length !== 1) {\n            if (this._curFirst < this._bucketSize - 1) {\n                this._curFirst += 1;\n            }\n            else if (this._first < this._bucketNum - 1) {\n                this._first += 1;\n                this._curFirst = 0;\n            }\n            else {\n                this._first = 0;\n                this._curFirst = 0;\n            }\n        }\n        this._length -= 1;\n        return value;\n    };\n    Deque.prototype.getElementByPos = function (pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        var _a = this._getElementIndex(pos), curNodeBucketIndex = _a.curNodeBucketIndex, curNodePointerIndex = _a.curNodePointerIndex;\n        return this._map[curNodeBucketIndex][curNodePointerIndex];\n    };\n    Deque.prototype.setElementByPos = function (pos, element) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        var _a = this._getElementIndex(pos), curNodeBucketIndex = _a.curNodeBucketIndex, curNodePointerIndex = _a.curNodePointerIndex;\n        this._map[curNodeBucketIndex][curNodePointerIndex] = element;\n    };\n    Deque.prototype.insert = function (pos, element, num) {\n        if (num === void 0) { num = 1; }\n        if (pos < 0 || pos > this._length) {\n            throw new RangeError();\n        }\n        if (pos === 0) {\n            while (num--)\n                this.pushFront(element);\n        }\n        else if (pos === this._length) {\n            while (num--)\n                this.pushBack(element);\n        }\n        else {\n            var arr = [];\n            for (var i = pos; i < this._length; ++i) {\n                arr.push(this.getElementByPos(i));\n            }\n            this.cut(pos - 1);\n            for (var i = 0; i < num; ++i)\n                this.pushBack(element);\n            for (var i = 0; i < arr.length; ++i)\n                this.pushBack(arr[i]);\n        }\n        return this._length;\n    };\n    /**\n     * @description Remove all elements after the specified position (excluding the specified position).\n     * @param pos - The previous position of the first removed element.\n     * @returns The size of the container after cutting.\n     * @example\n     * deque.cut(1); // Then deque's size will be 2. deque -> [0, 1]\n     */\n    Deque.prototype.cut = function (pos) {\n        if (pos < 0) {\n            this.clear();\n            return 0;\n        }\n        var _a = this._getElementIndex(pos), curNodeBucketIndex = _a.curNodeBucketIndex, curNodePointerIndex = _a.curNodePointerIndex;\n        this._last = curNodeBucketIndex;\n        this._curLast = curNodePointerIndex;\n        this._length = pos + 1;\n        return this._length;\n    };\n    Deque.prototype.eraseElementByPos = function (pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        if (pos === 0)\n            this.popFront();\n        else if (pos === this._length - 1)\n            this.popBack();\n        else {\n            var arr = [];\n            for (var i = pos + 1; i < this._length; ++i) {\n                arr.push(this.getElementByPos(i));\n            }\n            this.cut(pos);\n            this.popBack();\n            var self_1 = this;\n            arr.forEach(function (el) {\n                self_1.pushBack(el);\n            });\n        }\n        return this._length;\n    };\n    Deque.prototype.eraseElementByValue = function (value) {\n        if (this._length === 0)\n            return 0;\n        var arr = [];\n        for (var i = 0; i < this._length; ++i) {\n            var element = this.getElementByPos(i);\n            if (element !== value)\n                arr.push(element);\n        }\n        var _length = arr.length;\n        for (var i = 0; i < _length; ++i)\n            this.setElementByPos(i, arr[i]);\n        return this.cut(_length - 1);\n    };\n    Deque.prototype.eraseElementByIterator = function (iter) {\n        var _node = iter._node;\n        this.eraseElementByPos(_node);\n        iter = iter.next();\n        return iter;\n    };\n    Deque.prototype.find = function (element) {\n        for (var i = 0; i < this._length; ++i) {\n            if (this.getElementByPos(i) === element) {\n                return new DequeIterator(i, this);\n            }\n        }\n        return this.end();\n    };\n    Deque.prototype.reverse = function () {\n        var l = 0;\n        var r = this._length - 1;\n        while (l < r) {\n            var tmp = this.getElementByPos(l);\n            this.setElementByPos(l, this.getElementByPos(r));\n            this.setElementByPos(r, tmp);\n            l += 1;\n            r -= 1;\n        }\n    };\n    Deque.prototype.unique = function () {\n        if (this._length <= 1) {\n            return this._length;\n        }\n        var index = 1;\n        var pre = this.getElementByPos(0);\n        for (var i = 1; i < this._length; ++i) {\n            var cur = this.getElementByPos(i);\n            if (cur !== pre) {\n                pre = cur;\n                this.setElementByPos(index++, cur);\n            }\n        }\n        while (this._length > index)\n            this.popBack();\n        return this._length;\n    };\n    Deque.prototype.sort = function (cmp) {\n        var arr = [];\n        for (var i = 0; i < this._length; ++i) {\n            arr.push(this.getElementByPos(i));\n        }\n        arr.sort(cmp);\n        for (var i = 0; i < this._length; ++i)\n            this.setElementByPos(i, arr[i]);\n    };\n    /**\n     * @description Remove as much useless space as possible.\n     */\n    Deque.prototype.shrinkToFit = function () {\n        if (this._length === 0)\n            return;\n        var arr = [];\n        this.forEach(function (el) {\n            arr.push(el);\n        });\n        this._bucketNum = Math.max(Math.ceil(this._length / this._bucketSize), 1);\n        this._length = this._first = this._last = this._curFirst = this._curLast = 0;\n        this._map = [];\n        for (var i = 0; i < this._bucketNum; ++i) {\n            this._map.push(new Array(this._bucketSize));\n        }\n        for (var i = 0; i < arr.length; ++i)\n            this.pushBack(arr[i]);\n    };\n    Deque.prototype.forEach = function (callback) {\n        for (var i = 0; i < this._length; ++i) {\n            callback(this.getElementByPos(i), i, this);\n        }\n    };\n    Deque.prototype[Symbol.iterator] = function () {\n        return function () {\n            var i;\n            return __generator(this, function (_a) {\n                switch (_a.label) {\n                    case 0:\n                        i = 0;\n                        _a.label = 1;\n                    case 1:\n                        if (!(i < this._length)) return [3 /*break*/, 4];\n                        return [4 /*yield*/, this.getElementByPos(i)];\n                    case 2:\n                        _a.sent();\n                        _a.label = 3;\n                    case 3:\n                        ++i;\n                        return [3 /*break*/, 1];\n                    case 4: return [2 /*return*/];\n                }\n            });\n        }.bind(this)();\n    };\n    return Deque;\n}(SequentialContainer));\nexport default Deque;\n","import SequentialContainer from './Base';\nimport { IteratorType, initContainer } from '@/container/ContainerBase';\nimport { RandomIterator } from '@/container/SequentialContainer/Base/RandomIterator';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport $getContainerSize from '@/utils/getContainerSize.macro';\n\nclass DequeIterator<T> extends RandomIterator<T> {\n  readonly container: Deque<T>;\n  constructor(node: number, container: Deque<T>, iteratorType?: IteratorType) {\n    super(node, iteratorType);\n    this.container = container;\n  }\n  copy() {\n    return new DequeIterator<T>(this._node, this.container, this.iteratorType);\n  }\n  // @ts-ignore\n  equals(iter: DequeIterator<T>): boolean;\n}\n\nexport type { DequeIterator };\n\nclass Deque<T> extends SequentialContainer<T> {\n  /**\n   * @internal\n   */\n  private _first = 0;\n  /**\n   * @internal\n   */\n  private _curFirst = 0;\n  /**\n   * @internal\n   */\n  private _last = 0;\n  /**\n   * @internal\n   */\n  private _curLast = 0;\n  /**\n   * @internal\n   */\n  private _bucketNum = 0;\n  /**\n   * @internal\n   */\n  private readonly _bucketSize: number;\n  /**\n   * @internal\n   */\n  private _map: T[][] = [];\n  constructor(container: initContainer<T> = [], _bucketSize = (1 << 12)) {\n    super();\n    const _length = $getContainerSize!(container);\n    this._bucketSize = _bucketSize;\n    this._bucketNum = Math.max(Math.ceil(_length / this._bucketSize), 1);\n    for (let i = 0; i < this._bucketNum; ++i) {\n      this._map.push(new Array(this._bucketSize));\n    }\n    const needBucketNum = Math.ceil(_length / this._bucketSize);\n    this._first = this._last = (this._bucketNum >> 1) - (needBucketNum >> 1);\n    this._curFirst = this._curLast = (this._bucketSize - _length % this._bucketSize) >> 1;\n    const self = this;\n    container.forEach(function (element) {\n      self.pushBack(element);\n    });\n  }\n  /**\n   * @description Growth the Deque.\n   * @internal\n   */\n  private _reAllocate() {\n    const newMap = [];\n    const addBucketNum = Math.max(this._bucketNum >> 1, 1);\n    for (let i = 0; i < addBucketNum; ++i) {\n      newMap[i] = new Array(this._bucketSize);\n    }\n    for (let i = this._first; i < this._bucketNum; ++i) {\n      newMap[newMap.length] = this._map[i];\n    }\n    for (let i = 0; i < this._last; ++i) {\n      newMap[newMap.length] = this._map[i];\n    }\n    newMap[newMap.length] = [...this._map[this._last]];\n    this._first = addBucketNum;\n    this._last = newMap.length - 1;\n    for (let i = 0; i < addBucketNum; ++i) {\n      newMap[newMap.length] = new Array(this._bucketSize);\n    }\n    this._map = newMap;\n    this._bucketNum = newMap.length;\n  }\n  /**\n   * @description Get the bucket position of the element and the pointer position by index.\n   * @param pos - The element's index.\n   * @internal\n   */\n  private _getElementIndex(pos: number) {\n    const offset = this._curFirst + pos + 1;\n    const offsetRemainder = offset % this._bucketSize;\n    let curNodePointerIndex = offsetRemainder - 1;\n    let curNodeBucketIndex = this._first + (offset - offsetRemainder) / this._bucketSize;\n    if (offsetRemainder === 0) curNodeBucketIndex -= 1;\n    curNodeBucketIndex %= this._bucketNum;\n    if (curNodePointerIndex < 0) curNodePointerIndex += this._bucketSize;\n    return { curNodeBucketIndex, curNodePointerIndex };\n  }\n  clear() {\n    this._map = [new Array(this._bucketSize)];\n    this._bucketNum = 1;\n    this._first = this._last = this._length = 0;\n    this._curFirst = this._curLast = this._bucketSize >> 1;\n  }\n  begin() {\n    return new DequeIterator<T>(0, this);\n  }\n  end() {\n    return new DequeIterator<T>(this._length, this);\n  }\n  rBegin() {\n    return new DequeIterator<T>(this._length - 1, this, IteratorType.REVERSE);\n  }\n  rEnd() {\n    return new DequeIterator<T>(-1, this, IteratorType.REVERSE);\n  }\n  front(): T | undefined {\n    if (this._length === 0) return;\n    return this._map[this._first][this._curFirst];\n  }\n  back(): T | undefined {\n    if (this._length === 0) return;\n    return this._map[this._last][this._curLast];\n  }\n  pushBack(element: T) {\n    if (this._length) {\n      if (this._curLast < this._bucketSize - 1) {\n        this._curLast += 1;\n      } else if (this._last < this._bucketNum - 1) {\n        this._last += 1;\n        this._curLast = 0;\n      } else {\n        this._last = 0;\n        this._curLast = 0;\n      }\n      if (\n        this._last === this._first &&\n        this._curLast === this._curFirst\n      ) this._reAllocate();\n    }\n    this._length += 1;\n    this._map[this._last][this._curLast] = element;\n    return this._length;\n  }\n  popBack() {\n    if (this._length === 0) return;\n    const value = this._map[this._last][this._curLast];\n    if (this._length !== 1) {\n      if (this._curLast > 0) {\n        this._curLast -= 1;\n      } else if (this._last > 0) {\n        this._last -= 1;\n        this._curLast = this._bucketSize - 1;\n      } else {\n        this._last = this._bucketNum - 1;\n        this._curLast = this._bucketSize - 1;\n      }\n    }\n    this._length -= 1;\n    return value;\n  }\n  /**\n   * @description Push the element to the front.\n   * @param element - The element you want to push.\n   * @returns The size of queue after pushing.\n   */\n  pushFront(element: T) {\n    if (this._length) {\n      if (this._curFirst > 0) {\n        this._curFirst -= 1;\n      } else if (this._first > 0) {\n        this._first -= 1;\n        this._curFirst = this._bucketSize - 1;\n      } else {\n        this._first = this._bucketNum - 1;\n        this._curFirst = this._bucketSize - 1;\n      }\n      if (\n        this._first === this._last &&\n        this._curFirst === this._curLast\n      ) this._reAllocate();\n    }\n    this._length += 1;\n    this._map[this._first][this._curFirst] = element;\n    return this._length;\n  }\n  /**\n   * @description Remove the _first element.\n   * @returns The element you popped.\n   */\n  popFront() {\n    if (this._length === 0) return;\n    const value = this._map[this._first][this._curFirst];\n    if (this._length !== 1) {\n      if (this._curFirst < this._bucketSize - 1) {\n        this._curFirst += 1;\n      } else if (this._first < this._bucketNum - 1) {\n        this._first += 1;\n        this._curFirst = 0;\n      } else {\n        this._first = 0;\n        this._curFirst = 0;\n      }\n    }\n    this._length -= 1;\n    return value;\n  }\n  getElementByPos(pos: number): T {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    const {\n      curNodeBucketIndex,\n      curNodePointerIndex\n    } = this._getElementIndex(pos);\n    return this._map[curNodeBucketIndex][curNodePointerIndex]!;\n  }\n  setElementByPos(pos: number, element: T) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    const {\n      curNodeBucketIndex,\n      curNodePointerIndex\n    } = this._getElementIndex(pos);\n    this._map[curNodeBucketIndex][curNodePointerIndex] = element;\n  }\n  insert(pos: number, element: T, num = 1) {\n    $checkWithinAccessParams!(pos, 0, this._length);\n    if (pos === 0) {\n      while (num--) this.pushFront(element);\n    } else if (pos === this._length) {\n      while (num--) this.pushBack(element);\n    } else {\n      const arr: T[] = [];\n      for (let i = pos; i < this._length; ++i) {\n        arr.push(this.getElementByPos(i));\n      }\n      this.cut(pos - 1);\n      for (let i = 0; i < num; ++i) this.pushBack(element);\n      for (let i = 0; i < arr.length; ++i) this.pushBack(arr[i]);\n    }\n    return this._length;\n  }\n  /**\n   * @description Remove all elements after the specified position (excluding the specified position).\n   * @param pos - The previous position of the first removed element.\n   * @returns The size of the container after cutting.\n   * @example\n   * deque.cut(1); // Then deque's size will be 2. deque -> [0, 1]\n   */\n  cut(pos: number) {\n    if (pos < 0) {\n      this.clear();\n      return 0;\n    }\n    const {\n      curNodeBucketIndex,\n      curNodePointerIndex\n    } = this._getElementIndex(pos);\n    this._last = curNodeBucketIndex;\n    this._curLast = curNodePointerIndex;\n    this._length = pos + 1;\n    return this._length;\n  }\n  eraseElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    if (pos === 0) this.popFront();\n    else if (pos === this._length - 1) this.popBack();\n    else {\n      const arr = [];\n      for (let i = pos + 1; i < this._length; ++i) {\n        arr.push(this.getElementByPos(i));\n      }\n      this.cut(pos);\n      this.popBack();\n      const self = this;\n      arr.forEach(function (el) {\n        self.pushBack(el);\n      });\n    }\n    return this._length;\n  }\n  eraseElementByValue(value: T) {\n    if (this._length === 0) return 0;\n    const arr: T[] = [];\n    for (let i = 0; i < this._length; ++i) {\n      const element = this.getElementByPos(i);\n      if (element !== value) arr.push(element);\n    }\n    const _length = arr.length;\n    for (let i = 0; i < _length; ++i) this.setElementByPos(i, arr[i]);\n    return this.cut(_length - 1);\n  }\n  eraseElementByIterator(iter: DequeIterator<T>) {\n    const _node = iter._node;\n    this.eraseElementByPos(_node);\n    iter = iter.next();\n    return iter;\n  }\n  find(element: T) {\n    for (let i = 0; i < this._length; ++i) {\n      if (this.getElementByPos(i) === element) {\n        return new DequeIterator<T>(i, this);\n      }\n    }\n    return this.end();\n  }\n  reverse() {\n    let l = 0; let r = this._length - 1;\n    while (l < r) {\n      const tmp = this.getElementByPos(l);\n      this.setElementByPos(l, this.getElementByPos(r));\n      this.setElementByPos(r, tmp);\n      l += 1;\n      r -= 1;\n    }\n  }\n  unique() {\n    if (this._length <= 1) {\n      return this._length;\n    }\n    let index = 1;\n    let pre = this.getElementByPos(0);\n    for (let i = 1; i < this._length; ++i) {\n      const cur = this.getElementByPos(i);\n      if (cur !== pre) {\n        pre = cur;\n        this.setElementByPos(index++, cur);\n      }\n    }\n    while (this._length > index) this.popBack();\n    return this._length;\n  }\n  sort(cmp?: (x: T, y: T) => number) {\n    const arr: T[] = [];\n    for (let i = 0; i < this._length; ++i) {\n      arr.push(this.getElementByPos(i));\n    }\n    arr.sort(cmp);\n    for (let i = 0; i < this._length; ++i) this.setElementByPos(i, arr[i]);\n  }\n  /**\n   * @description Remove as much useless space as possible.\n   */\n  shrinkToFit() {\n    if (this._length === 0) return;\n    const arr: T[] = [];\n    this.forEach(function (el) {\n      arr.push(el);\n    });\n    this._bucketNum = Math.max(Math.ceil(this._length / this._bucketSize), 1);\n    this._length = this._first = this._last = this._curFirst = this._curLast = 0;\n    this._map = [];\n    for (let i = 0; i < this._bucketNum; ++i) {\n      this._map.push(new Array(this._bucketSize));\n    }\n    for (let i = 0; i < arr.length; ++i) this.pushBack(arr[i]);\n  }\n  forEach(callback: (element: T, index: number, deque: Deque<T>) => void) {\n    for (let i = 0; i < this._length; ++i) {\n      callback(this.getElementByPos(i), i, this);\n    }\n  }\n  [Symbol.iterator]() {\n    return function * (this: Deque<T>) {\n      for (let i = 0; i < this._length; ++i) {\n        yield this.getElementByPos(i);\n      }\n    }.bind(this)();\n  }\n}\n\nexport default Deque;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/LinkList.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/LinkList.d.ts
new file mode 100644
index 0000000..1aca864
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/LinkList.d.ts
@@ -0,0 +1,58 @@
+import SequentialContainer from './Base';
+import { ContainerIterator, initContainer } from "../ContainerBase";
+declare class LinkListIterator<T> extends ContainerIterator<T> {
+    readonly container: LinkList<T>;
+    get pointer(): T;
+    set pointer(newValue: T);
+    copy(): LinkListIterator<T>;
+    equals(iter: LinkListIterator<T>): boolean;
+    pre(): this;
+    next(): this;
+}
+export type { LinkListIterator };
+declare class LinkList<T> extends SequentialContainer<T> {
+    constructor(container?: initContainer<T>);
+    clear(): void;
+    begin(): LinkListIterator<T>;
+    end(): LinkListIterator<T>;
+    rBegin(): LinkListIterator<T>;
+    rEnd(): LinkListIterator<T>;
+    front(): T | undefined;
+    back(): T | undefined;
+    getElementByPos(pos: number): T;
+    eraseElementByPos(pos: number): number;
+    eraseElementByValue(_value: T): number;
+    eraseElementByIterator(iter: LinkListIterator<T>): LinkListIterator<T>;
+    pushBack(element: T): number;
+    popBack(): T | undefined;
+    /**
+     * @description Push an element to the front.
+     * @param element - The element you want to push.
+     * @returns The size of queue after pushing.
+     */
+    pushFront(element: T): number;
+    /**
+     * @description Removes the first element.
+     * @returns The element you popped.
+     */
+    popFront(): T | undefined;
+    setElementByPos(pos: number, element: T): void;
+    insert(pos: number, element: T, num?: number): number;
+    find(element: T): LinkListIterator<T>;
+    reverse(): void;
+    unique(): number;
+    sort(cmp?: (x: T, y: T) => number): void;
+    /**
+     * @description Merges two sorted lists.
+     * @param list - The other list you want to merge (must be sorted).
+     * @returns The size of list after merging.
+     * @example
+     * const linkA = new LinkList([1, 3, 5]);
+     * const linkB = new LinkList([2, 4, 6]);
+     * linkA.merge(linkB);  // [1, 2, 3, 4, 5];
+     */
+    merge(list: LinkList<T>): number;
+    forEach(callback: (element: T, index: number, list: LinkList<T>) => void): void;
+    [Symbol.iterator](): Generator<T, void, unknown>;
+}
+export default LinkList;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/LinkList.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/LinkList.js
new file mode 100644
index 0000000..17ce3e8
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/LinkList.js
@@ -0,0 +1,456 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(t, i) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(t, i) {
+            t.__proto__ = i;
+        } || function(t, i) {
+            for (var r in i) if (Object.prototype.hasOwnProperty.call(i, r)) t[r] = i[r];
+        };
+        return extendStatics(t, i);
+    };
+    return function(t, i) {
+        if (typeof i !== "function" && i !== null) throw new TypeError("Class extends value " + String(i) + " is not a constructor or null");
+        extendStatics(t, i);
+        function __() {
+            this.constructor = t;
+        }
+        t.prototype = i === null ? Object.create(i) : (__.prototype = i.prototype, new __);
+    };
+}();
+
+var __generator = this && this.i || function(t, i) {
+    var r = {
+        label: 0,
+        sent: function() {
+            if (e[0] & 1) throw e[1];
+            return e[1];
+        },
+        trys: [],
+        ops: []
+    }, n, s, e, h;
+    return h = {
+        next: verb(0),
+        throw: verb(1),
+        return: verb(2)
+    }, typeof Symbol === "function" && (h[Symbol.iterator] = function() {
+        return this;
+    }), h;
+    function verb(t) {
+        return function(i) {
+            return step([ t, i ]);
+        };
+    }
+    function step(h) {
+        if (n) throw new TypeError("Generator is already executing.");
+        while (r) try {
+            if (n = 1, s && (e = h[0] & 2 ? s["return"] : h[0] ? s["throw"] || ((e = s["return"]) && e.call(s), 
+            0) : s.next) && !(e = e.call(s, h[1])).done) return e;
+            if (s = 0, e) h = [ h[0] & 2, e.value ];
+            switch (h[0]) {
+              case 0:
+              case 1:
+                e = h;
+                break;
+
+              case 4:
+                r.label++;
+                return {
+                    value: h[1],
+                    done: false
+                };
+
+              case 5:
+                r.label++;
+                s = h[1];
+                h = [ 0 ];
+                continue;
+
+              case 7:
+                h = r.ops.pop();
+                r.trys.pop();
+                continue;
+
+              default:
+                if (!(e = r.trys, e = e.length > 0 && e[e.length - 1]) && (h[0] === 6 || h[0] === 2)) {
+                    r = 0;
+                    continue;
+                }
+                if (h[0] === 3 && (!e || h[1] > e[0] && h[1] < e[3])) {
+                    r.label = h[1];
+                    break;
+                }
+                if (h[0] === 6 && r.label < e[1]) {
+                    r.label = e[1];
+                    e = h;
+                    break;
+                }
+                if (e && r.label < e[2]) {
+                    r.label = e[2];
+                    r.ops.push(h);
+                    break;
+                }
+                if (e[2]) r.ops.pop();
+                r.trys.pop();
+                continue;
+            }
+            h = i.call(t, r);
+        } catch (t) {
+            h = [ 6, t ];
+            s = 0;
+        } finally {
+            n = e = 0;
+        }
+        if (h[0] & 5) throw h[1];
+        return {
+            value: h[0] ? h[1] : void 0,
+            done: true
+        };
+    }
+};
+
+import SequentialContainer from "./Base";
+
+import { ContainerIterator } from "../ContainerBase";
+
+import { throwIteratorAccessError } from "../../utils/throwError";
+
+var LinkListIterator = function(t) {
+    __extends(LinkListIterator, t);
+    function LinkListIterator(i, r, n, s) {
+        var e = t.call(this, s) || this;
+        e.o = i;
+        e.h = r;
+        e.container = n;
+        if (e.iteratorType === 0) {
+            e.pre = function() {
+                if (this.o.L === this.h) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.L;
+                return this;
+            };
+            e.next = function() {
+                if (this.o === this.h) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.m;
+                return this;
+            };
+        } else {
+            e.pre = function() {
+                if (this.o.m === this.h) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.m;
+                return this;
+            };
+            e.next = function() {
+                if (this.o === this.h) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.L;
+                return this;
+            };
+        }
+        return e;
+    }
+    Object.defineProperty(LinkListIterator.prototype, "pointer", {
+        get: function() {
+            if (this.o === this.h) {
+                throwIteratorAccessError();
+            }
+            return this.o.p;
+        },
+        set: function(t) {
+            if (this.o === this.h) {
+                throwIteratorAccessError();
+            }
+            this.o.p = t;
+        },
+        enumerable: false,
+        configurable: true
+    });
+    LinkListIterator.prototype.copy = function() {
+        return new LinkListIterator(this.o, this.h, this.container, this.iteratorType);
+    };
+    return LinkListIterator;
+}(ContainerIterator);
+
+var LinkList = function(t) {
+    __extends(LinkList, t);
+    function LinkList(i) {
+        if (i === void 0) {
+            i = [];
+        }
+        var r = t.call(this) || this;
+        r.h = {};
+        r.H = r.l = r.h.L = r.h.m = r.h;
+        var n = r;
+        i.forEach((function(t) {
+            n.pushBack(t);
+        }));
+        return r;
+    }
+    LinkList.prototype.G = function(t) {
+        var i = t.L, r = t.m;
+        i.m = r;
+        r.L = i;
+        if (t === this.H) {
+            this.H = r;
+        }
+        if (t === this.l) {
+            this.l = i;
+        }
+        this.M -= 1;
+    };
+    LinkList.prototype.F = function(t, i) {
+        var r = i.m;
+        var n = {
+            p: t,
+            L: i,
+            m: r
+        };
+        i.m = n;
+        r.L = n;
+        if (i === this.h) {
+            this.H = n;
+        }
+        if (r === this.h) {
+            this.l = n;
+        }
+        this.M += 1;
+    };
+    LinkList.prototype.clear = function() {
+        this.M = 0;
+        this.H = this.l = this.h.L = this.h.m = this.h;
+    };
+    LinkList.prototype.begin = function() {
+        return new LinkListIterator(this.H, this.h, this);
+    };
+    LinkList.prototype.end = function() {
+        return new LinkListIterator(this.h, this.h, this);
+    };
+    LinkList.prototype.rBegin = function() {
+        return new LinkListIterator(this.l, this.h, this, 1);
+    };
+    LinkList.prototype.rEnd = function() {
+        return new LinkListIterator(this.h, this.h, this, 1);
+    };
+    LinkList.prototype.front = function() {
+        return this.H.p;
+    };
+    LinkList.prototype.back = function() {
+        return this.l.p;
+    };
+    LinkList.prototype.getElementByPos = function(t) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        var i = this.H;
+        while (t--) {
+            i = i.m;
+        }
+        return i.p;
+    };
+    LinkList.prototype.eraseElementByPos = function(t) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        var i = this.H;
+        while (t--) {
+            i = i.m;
+        }
+        this.G(i);
+        return this.M;
+    };
+    LinkList.prototype.eraseElementByValue = function(t) {
+        var i = this.H;
+        while (i !== this.h) {
+            if (i.p === t) {
+                this.G(i);
+            }
+            i = i.m;
+        }
+        return this.M;
+    };
+    LinkList.prototype.eraseElementByIterator = function(t) {
+        var i = t.o;
+        if (i === this.h) {
+            throwIteratorAccessError();
+        }
+        t = t.next();
+        this.G(i);
+        return t;
+    };
+    LinkList.prototype.pushBack = function(t) {
+        this.F(t, this.l);
+        return this.M;
+    };
+    LinkList.prototype.popBack = function() {
+        if (this.M === 0) return;
+        var t = this.l.p;
+        this.G(this.l);
+        return t;
+    };
+    LinkList.prototype.pushFront = function(t) {
+        this.F(t, this.h);
+        return this.M;
+    };
+    LinkList.prototype.popFront = function() {
+        if (this.M === 0) return;
+        var t = this.H.p;
+        this.G(this.H);
+        return t;
+    };
+    LinkList.prototype.setElementByPos = function(t, i) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        var r = this.H;
+        while (t--) {
+            r = r.m;
+        }
+        r.p = i;
+    };
+    LinkList.prototype.insert = function(t, i, r) {
+        if (r === void 0) {
+            r = 1;
+        }
+        if (t < 0 || t > this.M) {
+            throw new RangeError;
+        }
+        if (r <= 0) return this.M;
+        if (t === 0) {
+            while (r--) this.pushFront(i);
+        } else if (t === this.M) {
+            while (r--) this.pushBack(i);
+        } else {
+            var n = this.H;
+            for (var s = 1; s < t; ++s) {
+                n = n.m;
+            }
+            var e = n.m;
+            this.M += r;
+            while (r--) {
+                n.m = {
+                    p: i,
+                    L: n
+                };
+                n.m.L = n;
+                n = n.m;
+            }
+            n.m = e;
+            e.L = n;
+        }
+        return this.M;
+    };
+    LinkList.prototype.find = function(t) {
+        var i = this.H;
+        while (i !== this.h) {
+            if (i.p === t) {
+                return new LinkListIterator(i, this.h, this);
+            }
+            i = i.m;
+        }
+        return this.end();
+    };
+    LinkList.prototype.reverse = function() {
+        if (this.M <= 1) return;
+        var t = this.H;
+        var i = this.l;
+        var r = 0;
+        while (r << 1 < this.M) {
+            var n = t.p;
+            t.p = i.p;
+            i.p = n;
+            t = t.m;
+            i = i.L;
+            r += 1;
+        }
+    };
+    LinkList.prototype.unique = function() {
+        if (this.M <= 1) {
+            return this.M;
+        }
+        var t = this.H;
+        while (t !== this.h) {
+            var i = t;
+            while (i.m !== this.h && i.p === i.m.p) {
+                i = i.m;
+                this.M -= 1;
+            }
+            t.m = i.m;
+            t.m.L = t;
+            t = t.m;
+        }
+        return this.M;
+    };
+    LinkList.prototype.sort = function(t) {
+        if (this.M <= 1) return;
+        var i = [];
+        this.forEach((function(t) {
+            i.push(t);
+        }));
+        i.sort(t);
+        var r = this.H;
+        i.forEach((function(t) {
+            r.p = t;
+            r = r.m;
+        }));
+    };
+    LinkList.prototype.merge = function(t) {
+        var i = this;
+        if (this.M === 0) {
+            t.forEach((function(t) {
+                i.pushBack(t);
+            }));
+        } else {
+            var r = this.H;
+            t.forEach((function(t) {
+                while (r !== i.h && r.p <= t) {
+                    r = r.m;
+                }
+                i.F(t, r.L);
+            }));
+        }
+        return this.M;
+    };
+    LinkList.prototype.forEach = function(t) {
+        var i = this.H;
+        var r = 0;
+        while (i !== this.h) {
+            t(i.p, r++, this);
+            i = i.m;
+        }
+    };
+    LinkList.prototype[Symbol.iterator] = function() {
+        return function() {
+            var t;
+            return __generator(this, (function(i) {
+                switch (i.label) {
+                  case 0:
+                    if (this.M === 0) return [ 2 ];
+                    t = this.H;
+                    i.label = 1;
+
+                  case 1:
+                    if (!(t !== this.h)) return [ 3, 3 ];
+                    return [ 4, t.p ];
+
+                  case 2:
+                    i.sent();
+                    t = t.m;
+                    return [ 3, 1 ];
+
+                  case 3:
+                    return [ 2 ];
+                }
+            }));
+        }.bind(this)();
+    };
+    return LinkList;
+}(SequentialContainer);
+
+export default LinkList;
+//# sourceMappingURL=LinkList.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/LinkList.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/LinkList.js.map
new file mode 100644
index 0000000..a5edf41
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/LinkList.js.map
@@ -0,0 +1 @@
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done: false };\n                case 5: _.label++; y = op[1]; op = [0]; continue;\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\n                default:\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n                    if (t[2]) _.ops.pop();\n                    _.trys.pop(); continue;\n            }\n            op = body.call(thisArg, _);\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n    }\n};\nimport SequentialContainer from './Base';\nimport { ContainerIterator } from \"../ContainerBase\";\nimport $checkWithinAccessParams from \"../../utils/checkParams.macro\";\nimport { throwIteratorAccessError } from \"../../utils/throwError\";\nvar LinkListIterator = /** @class */ (function (_super) {\n    __extends(LinkListIterator, _super);\n    /**\n     * @internal\n     */\n    function LinkListIterator(_node, _header, container, iteratorType) {\n        var _this = _super.call(this, iteratorType) || this;\n        _this._node = _node;\n        _this._header = _header;\n        _this.container = container;\n        if (_this.iteratorType === 0 /* IteratorType.NORMAL */) {\n            _this.pre = function () {\n                if (this._node._pre === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre;\n                return this;\n            };\n            _this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next;\n                return this;\n            };\n        }\n        else {\n            _this.pre = function () {\n                if (this._node._next === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next;\n                return this;\n            };\n            _this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre;\n                return this;\n            };\n        }\n        return _this;\n    }\n    Object.defineProperty(LinkListIterator.prototype, \"pointer\", {\n        get: function () {\n            if (this._node === this._header) {\n                throwIteratorAccessError();\n            }\n            return this._node._value;\n        },\n        set: function (newValue) {\n            if (this._node === this._header) {\n                throwIteratorAccessError();\n            }\n            this._node._value = newValue;\n        },\n        enumerable: false,\n        configurable: true\n    });\n    LinkListIterator.prototype.copy = function () {\n        return new LinkListIterator(this._node, this._header, this.container, this.iteratorType);\n    };\n    return LinkListIterator;\n}(ContainerIterator));\nvar LinkList = /** @class */ (function (_super) {\n    __extends(LinkList, _super);\n    function LinkList(container) {\n        if (container === void 0) { container = []; }\n        var _this = _super.call(this) || this;\n        _this._header = {};\n        _this._head = _this._tail = _this._header._pre = _this._header._next = _this._header;\n        var self = _this;\n        container.forEach(function (el) {\n            self.pushBack(el);\n        });\n        return _this;\n    }\n    /**\n     * @internal\n     */\n    LinkList.prototype._eraseNode = function (node) {\n        var _pre = node._pre, _next = node._next;\n        _pre._next = _next;\n        _next._pre = _pre;\n        if (node === this._head) {\n            this._head = _next;\n        }\n        if (node === this._tail) {\n            this._tail = _pre;\n        }\n        this._length -= 1;\n    };\n    /**\n     * @internal\n     */\n    LinkList.prototype._insertNode = function (value, pre) {\n        var next = pre._next;\n        var node = {\n            _value: value,\n            _pre: pre,\n            _next: next\n        };\n        pre._next = node;\n        next._pre = node;\n        if (pre === this._header) {\n            this._head = node;\n        }\n        if (next === this._header) {\n            this._tail = node;\n        }\n        this._length += 1;\n    };\n    LinkList.prototype.clear = function () {\n        this._length = 0;\n        this._head = this._tail = this._header._pre = this._header._next = this._header;\n    };\n    LinkList.prototype.begin = function () {\n        return new LinkListIterator(this._head, this._header, this);\n    };\n    LinkList.prototype.end = function () {\n        return new LinkListIterator(this._header, this._header, this);\n    };\n    LinkList.prototype.rBegin = function () {\n        return new LinkListIterator(this._tail, this._header, this, 1 /* IteratorType.REVERSE */);\n    };\n    LinkList.prototype.rEnd = function () {\n        return new LinkListIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    };\n    LinkList.prototype.front = function () {\n        return this._head._value;\n    };\n    LinkList.prototype.back = function () {\n        return this._tail._value;\n    };\n    LinkList.prototype.getElementByPos = function (pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        var curNode = this._head;\n        while (pos--) {\n            curNode = curNode._next;\n        }\n        return curNode._value;\n    };\n    LinkList.prototype.eraseElementByPos = function (pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        var curNode = this._head;\n        while (pos--) {\n            curNode = curNode._next;\n        }\n        this._eraseNode(curNode);\n        return this._length;\n    };\n    LinkList.prototype.eraseElementByValue = function (_value) {\n        var curNode = this._head;\n        while (curNode !== this._header) {\n            if (curNode._value === _value) {\n                this._eraseNode(curNode);\n            }\n            curNode = curNode._next;\n        }\n        return this._length;\n    };\n    LinkList.prototype.eraseElementByIterator = function (iter) {\n        var node = iter._node;\n        if (node === this._header) {\n            throwIteratorAccessError();\n        }\n        iter = iter.next();\n        this._eraseNode(node);\n        return iter;\n    };\n    LinkList.prototype.pushBack = function (element) {\n        this._insertNode(element, this._tail);\n        return this._length;\n    };\n    LinkList.prototype.popBack = function () {\n        if (this._length === 0)\n            return;\n        var value = this._tail._value;\n        this._eraseNode(this._tail);\n        return value;\n    };\n    /**\n     * @description Push an element to the front.\n     * @param element - The element you want to push.\n     * @returns The size of queue after pushing.\n     */\n    LinkList.prototype.pushFront = function (element) {\n        this._insertNode(element, this._header);\n        return this._length;\n    };\n    /**\n     * @description Removes the first element.\n     * @returns The element you popped.\n     */\n    LinkList.prototype.popFront = function () {\n        if (this._length === 0)\n            return;\n        var value = this._head._value;\n        this._eraseNode(this._head);\n        return value;\n    };\n    LinkList.prototype.setElementByPos = function (pos, element) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        var curNode = this._head;\n        while (pos--) {\n            curNode = curNode._next;\n        }\n        curNode._value = element;\n    };\n    LinkList.prototype.insert = function (pos, element, num) {\n        if (num === void 0) { num = 1; }\n        if (pos < 0 || pos > this._length) {\n            throw new RangeError();\n        }\n        if (num <= 0)\n            return this._length;\n        if (pos === 0) {\n            while (num--)\n                this.pushFront(element);\n        }\n        else if (pos === this._length) {\n            while (num--)\n                this.pushBack(element);\n        }\n        else {\n            var curNode = this._head;\n            for (var i = 1; i < pos; ++i) {\n                curNode = curNode._next;\n            }\n            var next = curNode._next;\n            this._length += num;\n            while (num--) {\n                curNode._next = {\n                    _value: element,\n                    _pre: curNode\n                };\n                curNode._next._pre = curNode;\n                curNode = curNode._next;\n            }\n            curNode._next = next;\n            next._pre = curNode;\n        }\n        return this._length;\n    };\n    LinkList.prototype.find = function (element) {\n        var curNode = this._head;\n        while (curNode !== this._header) {\n            if (curNode._value === element) {\n                return new LinkListIterator(curNode, this._header, this);\n            }\n            curNode = curNode._next;\n        }\n        return this.end();\n    };\n    LinkList.prototype.reverse = function () {\n        if (this._length <= 1)\n            return;\n        var pHead = this._head;\n        var pTail = this._tail;\n        var cnt = 0;\n        while ((cnt << 1) < this._length) {\n            var tmp = pHead._value;\n            pHead._value = pTail._value;\n            pTail._value = tmp;\n            pHead = pHead._next;\n            pTail = pTail._pre;\n            cnt += 1;\n        }\n    };\n    LinkList.prototype.unique = function () {\n        if (this._length <= 1) {\n            return this._length;\n        }\n        var curNode = this._head;\n        while (curNode !== this._header) {\n            var tmpNode = curNode;\n            while (tmpNode._next !== this._header &&\n                tmpNode._value === tmpNode._next._value) {\n                tmpNode = tmpNode._next;\n                this._length -= 1;\n            }\n            curNode._next = tmpNode._next;\n            curNode._next._pre = curNode;\n            curNode = curNode._next;\n        }\n        return this._length;\n    };\n    LinkList.prototype.sort = function (cmp) {\n        if (this._length <= 1)\n            return;\n        var arr = [];\n        this.forEach(function (el) {\n            arr.push(el);\n        });\n        arr.sort(cmp);\n        var curNode = this._head;\n        arr.forEach(function (element) {\n            curNode._value = element;\n            curNode = curNode._next;\n        });\n    };\n    /**\n     * @description Merges two sorted lists.\n     * @param list - The other list you want to merge (must be sorted).\n     * @returns The size of list after merging.\n     * @example\n     * const linkA = new LinkList([1, 3, 5]);\n     * const linkB = new LinkList([2, 4, 6]);\n     * linkA.merge(linkB);  // [1, 2, 3, 4, 5];\n     */\n    LinkList.prototype.merge = function (list) {\n        var self = this;\n        if (this._length === 0) {\n            list.forEach(function (el) {\n                self.pushBack(el);\n            });\n        }\n        else {\n            var curNode_1 = this._head;\n            list.forEach(function (el) {\n                while (curNode_1 !== self._header &&\n                    curNode_1._value <= el) {\n                    curNode_1 = curNode_1._next;\n                }\n                self._insertNode(el, curNode_1._pre);\n            });\n        }\n        return this._length;\n    };\n    LinkList.prototype.forEach = function (callback) {\n        var curNode = this._head;\n        var index = 0;\n        while (curNode !== this._header) {\n            callback(curNode._value, index++, this);\n            curNode = curNode._next;\n        }\n    };\n    LinkList.prototype[Symbol.iterator] = function () {\n        return function () {\n            var curNode;\n            return __generator(this, function (_a) {\n                switch (_a.label) {\n                    case 0:\n                        if (this._length === 0)\n                            return [2 /*return*/];\n                        curNode = this._head;\n                        _a.label = 1;\n                    case 1:\n                        if (!(curNode !== this._header)) return [3 /*break*/, 3];\n                        return [4 /*yield*/, curNode._value];\n                    case 2:\n                        _a.sent();\n                        curNode = curNode._next;\n                        return [3 /*break*/, 1];\n                    case 3: return [2 /*return*/];\n                }\n            });\n        }.bind(this)();\n    };\n    return LinkList;\n}(SequentialContainer));\nexport default LinkList;\n","import SequentialContainer from './Base';\nimport { ContainerIterator, initContainer, IteratorType } from '@/container/ContainerBase';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\ntype LinkNode<T> = {\n  _value: T;\n  _pre: LinkNode<T>;\n  _next: LinkNode<T>;\n}\n\nclass LinkListIterator<T> extends ContainerIterator<T> {\n  readonly container: LinkList<T>;\n  /**\n   * @internal\n   */\n  _node: LinkNode<T>;\n  /**\n   * @internal\n   */\n  private readonly _header: LinkNode<T>;\n  /**\n   * @internal\n   */\n  constructor(\n    _node: LinkNode<T>,\n    _header: LinkNode<T>,\n    container: LinkList<T>,\n    iteratorType?: IteratorType\n  ) {\n    super(iteratorType);\n    this._node = _node;\n    this._header = _header;\n    this.container = container;\n    if (this.iteratorType === IteratorType.NORMAL) {\n      this.pre = function () {\n        if (this._node._pre === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next;\n        return this;\n      };\n    } else {\n      this.pre = function () {\n        if (this._node._next === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next;\n        return this;\n      };\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre;\n        return this;\n      };\n    }\n  }\n  get pointer() {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    return this._node._value;\n  }\n  set pointer(newValue: T) {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    this._node._value = newValue;\n  }\n  copy() {\n    return new LinkListIterator<T>(this._node, this._header, this.container, this.iteratorType);\n  }\n  // @ts-ignore\n  equals(iter: LinkListIterator<T>): boolean;\n  // @ts-ignore\n  pre(): this;\n  // @ts-ignore\n  next(): this;\n}\n\nexport type { LinkListIterator };\n\nclass LinkList<T> extends SequentialContainer<T> {\n  /**\n   * @internal\n   */\n  private _head: LinkNode<T>;\n  /**\n   * @internal\n   */\n  private _tail: LinkNode<T>;\n  /**\n   * @internal\n   */\n  private readonly _header: LinkNode<T>;\n  constructor(container: initContainer<T> = []) {\n    super();\n    this._header = <LinkNode<T>>{};\n    this._head = this._tail = this._header._pre = this._header._next = this._header;\n    const self = this;\n    container.forEach(function (el) {\n      self.pushBack(el);\n    });\n  }\n  /**\n   * @internal\n   */\n  private _eraseNode(node: LinkNode<T>) {\n    const { _pre, _next } = node;\n    _pre._next = _next;\n    _next._pre = _pre;\n    if (node === this._head) {\n      this._head = _next;\n    }\n    if (node === this._tail) {\n      this._tail = _pre;\n    }\n    this._length -= 1;\n  }\n  /**\n   * @internal\n   */\n  private _insertNode(value: T, pre: LinkNode<T>) {\n    const next = pre._next;\n    const node = {\n      _value: value,\n      _pre: pre,\n      _next: next\n    };\n    pre._next = node;\n    next._pre = node;\n    if (pre === this._header) {\n      this._head = node;\n    }\n    if (next === this._header) {\n      this._tail = node;\n    }\n    this._length += 1;\n  }\n  clear() {\n    this._length = 0;\n    this._head = this._tail = this._header._pre = this._header._next = this._header;\n  }\n  begin() {\n    return new LinkListIterator<T>(this._head, this._header, this);\n  }\n  end() {\n    return new LinkListIterator<T>(this._header, this._header, this);\n  }\n  rBegin() {\n    return new LinkListIterator<T>(this._tail, this._header, this, IteratorType.REVERSE);\n  }\n  rEnd() {\n    return new LinkListIterator<T>(this._header, this._header, this, IteratorType.REVERSE);\n  }\n  front(): T | undefined {\n    return this._head._value;\n  }\n  back(): T | undefined {\n    return this._tail._value;\n  }\n  getElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let curNode = this._head;\n    while (pos--) {\n      curNode = curNode._next;\n    }\n    return curNode._value;\n  }\n  eraseElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let curNode = this._head;\n    while (pos--) {\n      curNode = curNode._next;\n    }\n    this._eraseNode(curNode);\n    return this._length;\n  }\n  eraseElementByValue(_value: T) {\n    let curNode = this._head;\n    while (curNode !== this._header) {\n      if (curNode._value === _value) {\n        this._eraseNode(curNode);\n      }\n      curNode = curNode._next;\n    }\n    return this._length;\n  }\n  eraseElementByIterator(iter: LinkListIterator<T>) {\n    const node = iter._node;\n    if (node === this._header) {\n      throwIteratorAccessError();\n    }\n    iter = iter.next();\n    this._eraseNode(node);\n    return iter;\n  }\n  pushBack(element: T) {\n    this._insertNode(element, this._tail);\n    return this._length;\n  }\n  popBack() {\n    if (this._length === 0) return;\n    const value = this._tail._value;\n    this._eraseNode(this._tail);\n    return value;\n  }\n  /**\n   * @description Push an element to the front.\n   * @param element - The element you want to push.\n   * @returns The size of queue after pushing.\n   */\n  pushFront(element: T) {\n    this._insertNode(element, this._header);\n    return this._length;\n  }\n  /**\n   * @description Removes the first element.\n   * @returns The element you popped.\n   */\n  popFront() {\n    if (this._length === 0) return;\n    const value = this._head._value;\n    this._eraseNode(this._head);\n    return value;\n  }\n  setElementByPos(pos: number, element: T) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let curNode = this._head;\n    while (pos--) {\n      curNode = curNode._next;\n    }\n    curNode._value = element;\n  }\n  insert(pos: number, element: T, num = 1) {\n    $checkWithinAccessParams!(pos, 0, this._length);\n    if (num <= 0) return this._length;\n    if (pos === 0) {\n      while (num--) this.pushFront(element);\n    } else if (pos === this._length) {\n      while (num--) this.pushBack(element);\n    } else {\n      let curNode = this._head;\n      for (let i = 1; i < pos; ++i) {\n        curNode = curNode._next;\n      }\n      const next = curNode._next;\n      this._length += num;\n      while (num--) {\n        curNode._next = <LinkNode<T>>{\n          _value: element,\n          _pre: curNode\n        };\n        curNode._next._pre = curNode;\n        curNode = curNode._next;\n      }\n      curNode._next = next;\n      next._pre = curNode;\n    }\n    return this._length;\n  }\n  find(element: T) {\n    let curNode = this._head;\n    while (curNode !== this._header) {\n      if (curNode._value === element) {\n        return new LinkListIterator<T>(curNode, this._header, this);\n      }\n      curNode = curNode._next;\n    }\n    return this.end();\n  }\n  reverse() {\n    if (this._length <= 1) return;\n    let pHead = this._head;\n    let pTail = this._tail;\n    let cnt = 0;\n    while ((cnt << 1) < this._length) {\n      const tmp = pHead._value;\n      pHead._value = pTail._value;\n      pTail._value = tmp;\n      pHead = pHead._next;\n      pTail = pTail._pre;\n      cnt += 1;\n    }\n  }\n  unique() {\n    if (this._length <= 1) {\n      return this._length;\n    }\n    let curNode = this._head;\n    while (curNode !== this._header) {\n      let tmpNode = curNode;\n      while (\n        tmpNode._next !== this._header &&\n        tmpNode._value === tmpNode._next._value\n      ) {\n        tmpNode = tmpNode._next;\n        this._length -= 1;\n      }\n      curNode._next = tmpNode._next;\n      curNode._next._pre = curNode;\n      curNode = curNode._next;\n    }\n    return this._length;\n  }\n  sort(cmp?: (x: T, y: T) => number) {\n    if (this._length <= 1) return;\n    const arr: T[] = [];\n    this.forEach(function (el) {\n      arr.push(el);\n    });\n    arr.sort(cmp);\n    let curNode: LinkNode<T> = this._head;\n    arr.forEach(function (element) {\n      curNode._value = element;\n      curNode = curNode._next;\n    });\n  }\n  /**\n   * @description Merges two sorted lists.\n   * @param list - The other list you want to merge (must be sorted).\n   * @returns The size of list after merging.\n   * @example\n   * const linkA = new LinkList([1, 3, 5]);\n   * const linkB = new LinkList([2, 4, 6]);\n   * linkA.merge(linkB);  // [1, 2, 3, 4, 5];\n   */\n  merge(list: LinkList<T>) {\n    const self = this;\n    if (this._length === 0) {\n      list.forEach(function (el) {\n        self.pushBack(el);\n      });\n    } else {\n      let curNode = this._head;\n      list.forEach(function (el) {\n        while (\n          curNode !== self._header &&\n          curNode._value <= el\n        ) {\n          curNode = curNode._next;\n        }\n        self._insertNode(el, curNode._pre);\n      });\n    }\n    return this._length;\n  }\n  forEach(callback: (element: T, index: number, list: LinkList<T>) => void) {\n    let curNode = this._head;\n    let index = 0;\n    while (curNode !== this._header) {\n      callback(curNode._value, index++, this);\n      curNode = curNode._next;\n    }\n  }\n  [Symbol.iterator]() {\n    return function * (this: LinkList<T>) {\n      if (this._length === 0) return;\n      let curNode = this._head;\n      while (curNode !== this._header) {\n        yield curNode._value;\n        curNode = curNode._next;\n      }\n    }.bind(this)();\n  }\n}\n\nexport default LinkList;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Vector.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Vector.d.ts
new file mode 100644
index 0000000..d26df41
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Vector.d.ts
@@ -0,0 +1,40 @@
+import SequentialContainer from './Base';
+import { initContainer, IteratorType } from "../ContainerBase";
+import { RandomIterator } from "./Base/RandomIterator";
+declare class VectorIterator<T> extends RandomIterator<T> {
+    container: Vector<T>;
+    constructor(node: number, container: Vector<T>, iteratorType?: IteratorType);
+    copy(): VectorIterator<T>;
+    equals(iter: VectorIterator<T>): boolean;
+}
+export type { VectorIterator };
+declare class Vector<T> extends SequentialContainer<T> {
+    /**
+     * @param container - Initialize container, must have a forEach function.
+     * @param copy - When the container is an array, you can choose to directly operate on the original object of
+     *               the array or perform a shallow copy. The default is shallow copy.
+     */
+    constructor(container?: initContainer<T>, copy?: boolean);
+    clear(): void;
+    begin(): VectorIterator<T>;
+    end(): VectorIterator<T>;
+    rBegin(): VectorIterator<T>;
+    rEnd(): VectorIterator<T>;
+    front(): T | undefined;
+    back(): T | undefined;
+    getElementByPos(pos: number): T;
+    eraseElementByPos(pos: number): number;
+    eraseElementByValue(value: T): number;
+    eraseElementByIterator(iter: VectorIterator<T>): VectorIterator<T>;
+    pushBack(element: T): number;
+    popBack(): T | undefined;
+    setElementByPos(pos: number, element: T): void;
+    insert(pos: number, element: T, num?: number): number;
+    find(element: T): VectorIterator<T>;
+    reverse(): void;
+    unique(): number;
+    sort(cmp?: (x: T, y: T) => number): void;
+    forEach(callback: (element: T, index: number, vector: Vector<T>) => void): void;
+    [Symbol.iterator](): Generator<T, void, undefined>;
+}
+export default Vector;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Vector.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Vector.js
new file mode 100644
index 0000000..deaa342
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Vector.js
@@ -0,0 +1,323 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(t, r) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(t, r) {
+            t.__proto__ = r;
+        } || function(t, r) {
+            for (var e in r) if (Object.prototype.hasOwnProperty.call(r, e)) t[e] = r[e];
+        };
+        return extendStatics(t, r);
+    };
+    return function(t, r) {
+        if (typeof r !== "function" && r !== null) throw new TypeError("Class extends value " + String(r) + " is not a constructor or null");
+        extendStatics(t, r);
+        function __() {
+            this.constructor = t;
+        }
+        t.prototype = r === null ? Object.create(r) : (__.prototype = r.prototype, new __);
+    };
+}();
+
+var __generator = this && this.i || function(t, r) {
+    var e = {
+        label: 0,
+        sent: function() {
+            if (o[0] & 1) throw o[1];
+            return o[1];
+        },
+        trys: [],
+        ops: []
+    }, n, i, o, u;
+    return u = {
+        next: verb(0),
+        throw: verb(1),
+        return: verb(2)
+    }, typeof Symbol === "function" && (u[Symbol.iterator] = function() {
+        return this;
+    }), u;
+    function verb(t) {
+        return function(r) {
+            return step([ t, r ]);
+        };
+    }
+    function step(u) {
+        if (n) throw new TypeError("Generator is already executing.");
+        while (e) try {
+            if (n = 1, i && (o = u[0] & 2 ? i["return"] : u[0] ? i["throw"] || ((o = i["return"]) && o.call(i), 
+            0) : i.next) && !(o = o.call(i, u[1])).done) return o;
+            if (i = 0, o) u = [ u[0] & 2, o.value ];
+            switch (u[0]) {
+              case 0:
+              case 1:
+                o = u;
+                break;
+
+              case 4:
+                e.label++;
+                return {
+                    value: u[1],
+                    done: false
+                };
+
+              case 5:
+                e.label++;
+                i = u[1];
+                u = [ 0 ];
+                continue;
+
+              case 7:
+                u = e.ops.pop();
+                e.trys.pop();
+                continue;
+
+              default:
+                if (!(o = e.trys, o = o.length > 0 && o[o.length - 1]) && (u[0] === 6 || u[0] === 2)) {
+                    e = 0;
+                    continue;
+                }
+                if (u[0] === 3 && (!o || u[1] > o[0] && u[1] < o[3])) {
+                    e.label = u[1];
+                    break;
+                }
+                if (u[0] === 6 && e.label < o[1]) {
+                    e.label = o[1];
+                    o = u;
+                    break;
+                }
+                if (o && e.label < o[2]) {
+                    e.label = o[2];
+                    e.ops.push(u);
+                    break;
+                }
+                if (o[2]) e.ops.pop();
+                e.trys.pop();
+                continue;
+            }
+            u = r.call(t, e);
+        } catch (t) {
+            u = [ 6, t ];
+            i = 0;
+        } finally {
+            n = o = 0;
+        }
+        if (u[0] & 5) throw u[1];
+        return {
+            value: u[0] ? u[1] : void 0,
+            done: true
+        };
+    }
+};
+
+var __read = this && this.q || function(t, r) {
+    var e = typeof Symbol === "function" && t[Symbol.iterator];
+    if (!e) return t;
+    var n = e.call(t), i, o = [], u;
+    try {
+        while ((r === void 0 || r-- > 0) && !(i = n.next()).done) o.push(i.value);
+    } catch (t) {
+        u = {
+            error: t
+        };
+    } finally {
+        try {
+            if (i && !i.done && (e = n["return"])) e.call(n);
+        } finally {
+            if (u) throw u.error;
+        }
+    }
+    return o;
+};
+
+var __spreadArray = this && this.D || function(t, r, e) {
+    if (e || arguments.length === 2) for (var n = 0, i = r.length, o; n < i; n++) {
+        if (o || !(n in r)) {
+            if (!o) o = Array.prototype.slice.call(r, 0, n);
+            o[n] = r[n];
+        }
+    }
+    return t.concat(o || Array.prototype.slice.call(r));
+};
+
+var __values = this && this.V || function(t) {
+    var r = typeof Symbol === "function" && Symbol.iterator, e = r && t[r], n = 0;
+    if (e) return e.call(t);
+    if (t && typeof t.length === "number") return {
+        next: function() {
+            if (t && n >= t.length) t = void 0;
+            return {
+                value: t && t[n++],
+                done: !t
+            };
+        }
+    };
+    throw new TypeError(r ? "Object is not iterable." : "Symbol.iterator is not defined.");
+};
+
+import SequentialContainer from "./Base";
+
+import { RandomIterator } from "./Base/RandomIterator";
+
+var VectorIterator = function(t) {
+    __extends(VectorIterator, t);
+    function VectorIterator(r, e, n) {
+        var i = t.call(this, r, n) || this;
+        i.container = e;
+        return i;
+    }
+    VectorIterator.prototype.copy = function() {
+        return new VectorIterator(this.o, this.container, this.iteratorType);
+    };
+    return VectorIterator;
+}(RandomIterator);
+
+var Vector = function(t) {
+    __extends(Vector, t);
+    function Vector(r, e) {
+        if (r === void 0) {
+            r = [];
+        }
+        if (e === void 0) {
+            e = true;
+        }
+        var n = t.call(this) || this;
+        if (Array.isArray(r)) {
+            n.J = e ? __spreadArray([], __read(r), false) : r;
+            n.M = r.length;
+        } else {
+            n.J = [];
+            var i = n;
+            r.forEach((function(t) {
+                i.pushBack(t);
+            }));
+        }
+        return n;
+    }
+    Vector.prototype.clear = function() {
+        this.M = 0;
+        this.J.length = 0;
+    };
+    Vector.prototype.begin = function() {
+        return new VectorIterator(0, this);
+    };
+    Vector.prototype.end = function() {
+        return new VectorIterator(this.M, this);
+    };
+    Vector.prototype.rBegin = function() {
+        return new VectorIterator(this.M - 1, this, 1);
+    };
+    Vector.prototype.rEnd = function() {
+        return new VectorIterator(-1, this, 1);
+    };
+    Vector.prototype.front = function() {
+        return this.J[0];
+    };
+    Vector.prototype.back = function() {
+        return this.J[this.M - 1];
+    };
+    Vector.prototype.getElementByPos = function(t) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        return this.J[t];
+    };
+    Vector.prototype.eraseElementByPos = function(t) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        this.J.splice(t, 1);
+        this.M -= 1;
+        return this.M;
+    };
+    Vector.prototype.eraseElementByValue = function(t) {
+        var r = 0;
+        for (var e = 0; e < this.M; ++e) {
+            if (this.J[e] !== t) {
+                this.J[r++] = this.J[e];
+            }
+        }
+        this.M = this.J.length = r;
+        return this.M;
+    };
+    Vector.prototype.eraseElementByIterator = function(t) {
+        var r = t.o;
+        t = t.next();
+        this.eraseElementByPos(r);
+        return t;
+    };
+    Vector.prototype.pushBack = function(t) {
+        this.J.push(t);
+        this.M += 1;
+        return this.M;
+    };
+    Vector.prototype.popBack = function() {
+        if (this.M === 0) return;
+        this.M -= 1;
+        return this.J.pop();
+    };
+    Vector.prototype.setElementByPos = function(t, r) {
+        if (t < 0 || t > this.M - 1) {
+            throw new RangeError;
+        }
+        this.J[t] = r;
+    };
+    Vector.prototype.insert = function(t, r, e) {
+        var n;
+        if (e === void 0) {
+            e = 1;
+        }
+        if (t < 0 || t > this.M) {
+            throw new RangeError;
+        }
+        (n = this.J).splice.apply(n, __spreadArray([ t, 0 ], __read(new Array(e).fill(r)), false));
+        this.M += e;
+        return this.M;
+    };
+    Vector.prototype.find = function(t) {
+        for (var r = 0; r < this.M; ++r) {
+            if (this.J[r] === t) {
+                return new VectorIterator(r, this);
+            }
+        }
+        return this.end();
+    };
+    Vector.prototype.reverse = function() {
+        this.J.reverse();
+    };
+    Vector.prototype.unique = function() {
+        var t = 1;
+        for (var r = 1; r < this.M; ++r) {
+            if (this.J[r] !== this.J[r - 1]) {
+                this.J[t++] = this.J[r];
+            }
+        }
+        this.M = this.J.length = t;
+        return this.M;
+    };
+    Vector.prototype.sort = function(t) {
+        this.J.sort(t);
+    };
+    Vector.prototype.forEach = function(t) {
+        for (var r = 0; r < this.M; ++r) {
+            t(this.J[r], r, this);
+        }
+    };
+    Vector.prototype[Symbol.iterator] = function() {
+        return function() {
+            return __generator(this, (function(t) {
+                switch (t.label) {
+                  case 0:
+                    return [ 5, __values(this.J) ];
+
+                  case 1:
+                    t.sent();
+                    return [ 2 ];
+                }
+            }));
+        }.bind(this)();
+    };
+    return Vector;
+}(SequentialContainer);
+
+export default Vector;
+//# sourceMappingURL=Vector.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Vector.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Vector.js.map
new file mode 100644
index 0000000..225a82d
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/SequentialContainer/Vector.js.map
@@ -0,0 +1 @@
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The default is shallow copy.\n     */\n    function Vector(container, copy) {\n        if (container === void 0) { container = []; }\n        if (copy === void 0) { copy = true; }\n        var _this = _super.call(this) || this;\n        if (Array.isArray(container)) {\n            _this._vector = copy ? __spreadArray([], __read(container), false) : container;\n            _this._length = container.length;\n        }\n        else {\n            _this._vector = [];\n            var self_1 = _this;\n            container.forEach(function (el) {\n                self_1.pushBack(el);\n            });\n        }\n        return _this;\n    }\n    Vector.prototype.clear = function () {\n        this._length = 0;\n        this._vector.length = 0;\n    };\n    Vector.prototype.begin = function () {\n        return new VectorIterator(0, this);\n    };\n    Vector.prototype.end = function () {\n        return new VectorIterator(this._length, this);\n    };\n    Vector.prototype.rBegin = function () {\n        return new VectorIterator(this._length - 1, this, 1 /* IteratorType.REVERSE */);\n    };\n    Vector.prototype.rEnd = function () {\n        return new VectorIterator(-1, this, 1 /* IteratorType.REVERSE */);\n    };\n    Vector.prototype.front = function () {\n        return this._vector[0];\n    };\n    Vector.prototype.back = function () {\n        return this._vector[this._length - 1];\n    };\n    Vector.prototype.getElementByPos = function (pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        return this._vector[pos];\n    };\n    Vector.prototype.eraseElementByPos = function (pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        this._vector.splice(pos, 1);\n        this._length -= 1;\n        return this._length;\n    };\n    Vector.prototype.eraseElementByValue = function (value) {\n        var index = 0;\n        for (var i = 0; i < this._length; ++i) {\n            if (this._vector[i] !== value) {\n                this._vector[index++] = this._vector[i];\n            }\n        }\n        this._length = this._vector.length = index;\n        return this._length;\n    };\n    Vector.prototype.eraseElementByIterator = function (iter) {\n        var _node = iter._node;\n        iter = iter.next();\n        this.eraseElementByPos(_node);\n        return iter;\n    };\n    Vector.prototype.pushBack = function (element) {\n        this._vector.push(element);\n        this._length += 1;\n        return this._length;\n    };\n    Vector.prototype.popBack = function () {\n        if (this._length === 0)\n            return;\n        this._length -= 1;\n        return this._vector.pop();\n    };\n    Vector.prototype.setElementByPos = function (pos, element) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        this._vector[pos] = element;\n    };\n    Vector.prototype.insert = function (pos, element, num) {\n        var _a;\n        if (num === void 0) { num = 1; }\n        if (pos < 0 || pos > this._length) {\n            throw new RangeError();\n        }\n        (_a = this._vector).splice.apply(_a, __spreadArray([pos, 0], __read(new Array(num).fill(element)), false));\n        this._length += num;\n        return this._length;\n    };\n    Vector.prototype.find = function (element) {\n        for (var i = 0; i < this._length; ++i) {\n            if (this._vector[i] === element) {\n                return new VectorIterator(i, this);\n            }\n        }\n        return this.end();\n    };\n    Vector.prototype.reverse = function () {\n        this._vector.reverse();\n    };\n    Vector.prototype.unique = function () {\n        var index = 1;\n        for (var i = 1; i < this._length; ++i) {\n            if (this._vector[i] !== this._vector[i - 1]) {\n                this._vector[index++] = this._vector[i];\n            }\n        }\n        this._length = this._vector.length = index;\n        return this._length;\n    };\n    Vector.prototype.sort = function (cmp) {\n        this._vector.sort(cmp);\n    };\n    Vector.prototype.forEach = function (callback) {\n        for (var i = 0; i < this._length; ++i) {\n            callback(this._vector[i], i, this);\n        }\n    };\n    Vector.prototype[Symbol.iterator] = function () {\n        return function () {\n            return __generator(this, function (_a) {\n                switch (_a.label) {\n                    case 0: return [5 /*yield**/, __values(this._vector)];\n                    case 1:\n                        _a.sent();\n                        return [2 /*return*/];\n                }\n            });\n        }.bind(this)();\n    };\n    return Vector;\n}(SequentialContainer));\nexport default Vector;\n","import SequentialContainer from './Base';\nimport { initContainer, IteratorType } from '@/container/ContainerBase';\nimport { RandomIterator } from '@/container/SequentialContainer/Base/RandomIterator';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\n\nclass VectorIterator<T> extends RandomIterator<T> {\n  container: Vector<T>;\n  constructor(node: number, container: Vector<T>, iteratorType?: IteratorType) {\n    super(node, iteratorType);\n    this.container = container;\n  }\n  copy() {\n    return new VectorIterator<T>(this._node, this.container, this.iteratorType);\n  }\n  // @ts-ignore\n  equals(iter: VectorIterator<T>): boolean;\n}\n\nexport type { VectorIterator };\n\nclass Vector<T> extends SequentialContainer<T> {\n  /**\n   * @internal\n   */\n  private readonly _vector: T[];\n  /**\n   * @param container - Initialize container, must have a forEach function.\n   * @param copy - When the container is an array, you can choose to directly operate on the original object of\n   *               the array or perform a shallow copy. The default is shallow copy.\n   */\n  constructor(container: initContainer<T> = [], copy = true) {\n    super();\n    if (Array.isArray(container)) {\n      this._vector = copy ? [...container] : container;\n      this._length = container.length;\n    } else {\n      this._vector = [];\n      const self = this;\n      container.forEach(function (el) {\n        self.pushBack(el);\n      });\n    }\n  }\n  clear() {\n    this._length = 0;\n    this._vector.length = 0;\n  }\n  begin() {\n    return new VectorIterator<T>(0, this);\n  }\n  end() {\n    return new VectorIterator<T>(this._length, this);\n  }\n  rBegin() {\n    return new VectorIterator<T>(this._length - 1, this, IteratorType.REVERSE);\n  }\n  rEnd() {\n    return new VectorIterator<T>(-1, this, IteratorType.REVERSE);\n  }\n  front(): T | undefined {\n    return this._vector[0];\n  }\n  back(): T | undefined {\n    return this._vector[this._length - 1];\n  }\n  getElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    return this._vector[pos];\n  }\n  eraseElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    this._vector.splice(pos, 1);\n    this._length -= 1;\n    return this._length;\n  }\n  eraseElementByValue(value: T) {\n    let index = 0;\n    for (let i = 0; i < this._length; ++i) {\n      if (this._vector[i] !== value) {\n        this._vector[index++] = this._vector[i];\n      }\n    }\n    this._length = this._vector.length = index;\n    return this._length;\n  }\n  eraseElementByIterator(iter: VectorIterator<T>) {\n    const _node = iter._node;\n    iter = iter.next();\n    this.eraseElementByPos(_node);\n    return iter;\n  }\n  pushBack(element: T) {\n    this._vector.push(element);\n    this._length += 1;\n    return this._length;\n  }\n  popBack() {\n    if (this._length === 0) return;\n    this._length -= 1;\n    return this._vector.pop();\n  }\n  setElementByPos(pos: number, element: T) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    this._vector[pos] = element;\n  }\n  insert(pos: number, element: T, num = 1) {\n    $checkWithinAccessParams!(pos, 0, this._length);\n    this._vector.splice(pos, 0, ...new Array<T>(num).fill(element));\n    this._length += num;\n    return this._length;\n  }\n  find(element: T) {\n    for (let i = 0; i < this._length; ++i) {\n      if (this._vector[i] === element) {\n        return new VectorIterator<T>(i, this);\n      }\n    }\n    return this.end();\n  }\n  reverse() {\n    this._vector.reverse();\n  }\n  unique() {\n    let index = 1;\n    for (let i = 1; i < this._length; ++i) {\n      if (this._vector[i] !== this._vector[i - 1]) {\n        this._vector[index++] = this._vector[i];\n      }\n    }\n    this._length = this._vector.length = index;\n    return this._length;\n  }\n  sort(cmp?: (x: T, y: T) => number) {\n    this._vector.sort(cmp);\n  }\n  forEach(callback: (element: T, index: number, vector: Vector<T>) => void) {\n    for (let i = 0; i < this._length; ++i) {\n      callback(this._vector[i], i, this);\n    }\n  }\n  [Symbol.iterator]() {\n    return function * (this: Vector<T>) {\n      yield * this._vector;\n    }.bind(this)();\n  }\n}\n\nexport default Vector;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeIterator.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeIterator.d.ts
new file mode 100644
index 0000000..e628857
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeIterator.d.ts
@@ -0,0 +1,18 @@
+import { ContainerIterator } from "../../ContainerBase";
+import TreeContainer from "./index";
+declare abstract class TreeIterator<K, V> extends ContainerIterator<K | [K, V]> {
+    abstract readonly container: TreeContainer<K, V>;
+    /**
+     * @description Get the sequential index of the iterator in the tree container.<br/>
+     *              <strong>Note:</strong>
+     *              This function only takes effect when the specified tree container `enableIndex = true`.
+     * @returns The index subscript of the node in the tree.
+     * @example
+     * const st = new OrderedSet([1, 2, 3], true);
+     * console.log(st.begin().next().index);  // 1
+     */
+    get index(): number;
+    pre(): this;
+    next(): this;
+}
+export default TreeIterator;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeIterator.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeIterator.js
new file mode 100644
index 0000000..3e4f5c7
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeIterator.js
@@ -0,0 +1,98 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(r, t) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(r, t) {
+            r.__proto__ = t;
+        } || function(r, t) {
+            for (var e in t) if (Object.prototype.hasOwnProperty.call(t, e)) r[e] = t[e];
+        };
+        return extendStatics(r, t);
+    };
+    return function(r, t) {
+        if (typeof t !== "function" && t !== null) throw new TypeError("Class extends value " + String(t) + " is not a constructor or null");
+        extendStatics(r, t);
+        function __() {
+            this.constructor = r;
+        }
+        r.prototype = t === null ? Object.create(t) : (__.prototype = t.prototype, new __);
+    };
+}();
+
+import { ContainerIterator } from "../../ContainerBase";
+
+import { throwIteratorAccessError } from "../../../utils/throwError";
+
+var TreeIterator = function(r) {
+    __extends(TreeIterator, r);
+    function TreeIterator(t, e, i) {
+        var n = r.call(this, i) || this;
+        n.o = t;
+        n.h = e;
+        if (n.iteratorType === 0) {
+            n.pre = function() {
+                if (this.o === this.h.K) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.L();
+                return this;
+            };
+            n.next = function() {
+                if (this.o === this.h) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.m();
+                return this;
+            };
+        } else {
+            n.pre = function() {
+                if (this.o === this.h.N) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.m();
+                return this;
+            };
+            n.next = function() {
+                if (this.o === this.h) {
+                    throwIteratorAccessError();
+                }
+                this.o = this.o.L();
+                return this;
+            };
+        }
+        return n;
+    }
+    Object.defineProperty(TreeIterator.prototype, "index", {
+        get: function() {
+            var r = this.o;
+            var t = this.h.rr;
+            if (r === this.h) {
+                if (t) {
+                    return t.tr - 1;
+                }
+                return 0;
+            }
+            var e = 0;
+            if (r.K) {
+                e += r.K.tr;
+            }
+            while (r !== t) {
+                var i = r.rr;
+                if (r === i.N) {
+                    e += 1;
+                    if (i.K) {
+                        e += i.K.tr;
+                    }
+                }
+                r = i;
+            }
+            return e;
+        },
+        enumerable: false,
+        configurable: true
+    });
+    return TreeIterator;
+}(ContainerIterator);
+
+export default TreeIterator;
+//# sourceMappingURL=TreeIterator.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeIterator.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeIterator.js.map
new file mode 100644
index 0000000..85dad7d
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeIterator.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/TreeContainer/Base/TreeIterator.js","../../src/container/TreeContainer/Base/TreeIterator.ts"],"names":["__extends","this","extendStatics","d","b","Object","setPrototypeOf","__proto__","Array","p","prototype","hasOwnProperty","call","TypeError","String","__","constructor","create","ContainerIterator","throwIteratorAccessError","TreeIterator","_super","node","header","iteratorType","_this","_node","_header","pre","_left","_pre","next","_next","_right","defineProperty","get","root","_parent","_subTreeSize","index","enumerable","configurable"],"mappings":"AAAA,IAAIA,YAAaC,QAAQA,KAAKD,KAAe;IACzC,IAAIE,gBAAgB,SAAUC,GAAGC;QAC7BF,gBAAgBG,OAAOC,kBAClB;YAAEC,WAAW;qBAAgBC,SAAS,SAAUL,GAAGC;YAAKD,EAAEI,YAAYH;AAAG,aAC1E,SAAUD,GAAGC;YAAK,KAAK,IAAIK,KAAKL,GAAG,IAAIC,OAAOK,UAAUC,eAAeC,KAAKR,GAAGK,IAAIN,EAAEM,KAAKL,EAAEK;AAAI;QACpG,OAAOP,cAAcC,GAAGC;AAC5B;IACA,OAAO,SAAUD,GAAGC;QAChB,WAAWA,MAAM,cAAcA,MAAM,MACjC,MAAM,IAAIS,UAAU,yBAAyBC,OAAOV,KAAK;QAC7DF,cAAcC,GAAGC;QACjB,SAASW;YAAOd,KAAKe,cAAcb;AAAG;QACtCA,EAAEO,YAAYN,MAAM,OAAOC,OAAOY,OAAOb,MAAMW,GAAGL,YAAYN,EAAEM,WAAW,IAAIK;AACnF;AACJ,CAd6C;;SCEpCG,yBAAiC;;SAEjCC,gCAA0B;;AAEnC,IAAAC,eAAA,SAAAC;IAA0CrB,UAAAoB,cAAAC;IAaxC,SAAAD,aACEE,GACAC,GACAC;QAHF,IAAAC,IAKEJ,EAAAT,KAAAX,MAAMuB,MAAavB;QACnBwB,EAAKC,IAAQJ;QACbG,EAAKE,IAAUJ;QACf,IAAIE,EAAKD,iBAAY,GAA0B;YAC7CC,EAAKG,MAAM;gBACT,IAAI3B,KAAKyB,MAAUzB,KAAK0B,EAAQE,GAAO;oBACrCV;ADAM;gBCERlB,KAAKyB,IAAQzB,KAAKyB,EAAMI;gBACxB,OAAO7B;ADAH;YCGNwB,EAAKM,OAAO;gBACV,IAAI9B,KAAKyB,MAAUzB,KAAK0B,GAAS;oBAC/BR;ADDM;gBCGRlB,KAAKyB,IAAQzB,KAAKyB,EAAMM;gBACxB,OAAO/B;ADDH;AACJ,eCEG;YACLwB,EAAKG,MAAM;gBACT,IAAI3B,KAAKyB,MAAUzB,KAAK0B,EAAQM,GAAQ;oBACtCd;ADAM;gBCERlB,KAAKyB,IAAQzB,KAAKyB,EAAMM;gBACxB,OAAO/B;ADAH;YCGNwB,EAAKM,OAAO;gBACV,IAAI9B,KAAKyB,MAAUzB,KAAK0B,GAAS;oBAC/BR;ADDM;gBCGRlB,KAAKyB,IAAQzB,KAAKyB,EAAMI;gBACxB,OAAO7B;ADDH;AACJ;QACA,OAAOwB;AACX;ICWFpB,OAAA6B,eAAId,aAAAV,WAAA,SAAK;QDAHyB,KCAN;YACE,IAAIT,IAAQzB,KAAKyB;YACjB,IAAMU,IAAOnC,KAAK0B,EAAQU;YAC1B,IAAIX,MAAUzB,KAAK0B,GAAS;gBAC1B,IAAIS,GAAM;oBACR,OAAOA,EAAKE,KAAe;ADCnB;gBCCV,OAAO;ADCD;YCCR,IAAIC,IAAQ;YACZ,IAAIb,EAAMG,GAAO;gBACfU,KAAUb,EAAMG,EAAoCS;ADC9C;YCCR,OAAOZ,MAAUU,GAAM;gBACrB,IAAMC,IAAUX,EAAMW;gBACtB,IAAIX,MAAUW,EAAQJ,GAAQ;oBAC5BM,KAAS;oBACT,IAAIF,EAAQR,GAAO;wBACjBU,KAAUF,EAAQR,EAAoCS;ADC5C;AACJ;gBCCVZ,IAAQW;ADCF;YCCR,OAAOE;ADCH;QACAC,YAAY;QACZC,cAAc;;ICGtB,OAAArB;AAAA,CA7FA,CAA0CF;;eA+F3BE","file":"TreeIterator.js","sourcesContent":["var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nimport { ContainerIterator } from \"../../ContainerBase\";\nimport { throwIteratorAccessError } from \"../../../utils/throwError\";\nvar TreeIterator = /** @class */ (function (_super) {\n    __extends(TreeIterator, _super);\n    /**\n     * @internal\n     */\n    function TreeIterator(node, header, iteratorType) {\n        var _this = _super.call(this, iteratorType) || this;\n        _this._node = node;\n        _this._header = header;\n        if (_this.iteratorType === 0 /* IteratorType.NORMAL */) {\n            _this.pre = function () {\n                if (this._node === this._header._left) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre();\n                return this;\n            };\n            _this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next();\n                return this;\n            };\n        }\n        else {\n            _this.pre = function () {\n                if (this._node === this._header._right) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._next();\n                return this;\n            };\n            _this.next = function () {\n                if (this._node === this._header) {\n                    throwIteratorAccessError();\n                }\n                this._node = this._node._pre();\n                return this;\n            };\n        }\n        return _this;\n    }\n    Object.defineProperty(TreeIterator.prototype, \"index\", {\n        /**\n         * @description Get the sequential index of the iterator in the tree container.<br/>\n         *              <strong>Note:</strong>\n         *              This function only takes effect when the specified tree container `enableIndex = true`.\n         * @returns The index subscript of the node in the tree.\n         * @example\n         * const st = new OrderedSet([1, 2, 3], true);\n         * console.log(st.begin().next().index);  // 1\n         */\n        get: function () {\n            var _node = this._node;\n            var root = this._header._parent;\n            if (_node === this._header) {\n                if (root) {\n                    return root._subTreeSize - 1;\n                }\n                return 0;\n            }\n            var index = 0;\n            if (_node._left) {\n                index += _node._left._subTreeSize;\n            }\n            while (_node !== root) {\n                var _parent = _node._parent;\n                if (_node === _parent._right) {\n                    index += 1;\n                    if (_parent._left) {\n                        index += _parent._left._subTreeSize;\n                    }\n                }\n                _node = _parent;\n            }\n            return index;\n        },\n        enumerable: false,\n        configurable: true\n    });\n    return TreeIterator;\n}(ContainerIterator));\nexport default TreeIterator;\n","import { TreeNode } from './TreeNode';\nimport type { TreeNodeEnableIndex } from './TreeNode';\nimport { ContainerIterator, IteratorType } from '@/container/ContainerBase';\nimport TreeContainer from '@/container/TreeContainer/Base/index';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nabstract class TreeIterator<K, V> extends ContainerIterator<K | [K, V]> {\n  abstract readonly container: TreeContainer<K, V>;\n  /**\n   * @internal\n   */\n  _node: TreeNode<K, V>;\n  /**\n   * @internal\n   */\n  protected _header: TreeNode<K, V>;\n  /**\n   * @internal\n   */\n  protected constructor(\n    node: TreeNode<K, V>,\n    header: TreeNode<K, V>,\n    iteratorType?: IteratorType\n  ) {\n    super(iteratorType);\n    this._node = node;\n    this._header = header;\n    if (this.iteratorType === IteratorType.NORMAL) {\n      this.pre = function () {\n        if (this._node === this._header._left) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre();\n        return this;\n      };\n\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next();\n        return this;\n      };\n    } else {\n      this.pre = function () {\n        if (this._node === this._header._right) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._next();\n        return this;\n      };\n\n      this.next = function () {\n        if (this._node === this._header) {\n          throwIteratorAccessError();\n        }\n        this._node = this._node._pre();\n        return this;\n      };\n    }\n  }\n  /**\n   * @description Get the sequential index of the iterator in the tree container.<br/>\n   *              <strong>Note:</strong>\n   *              This function only takes effect when the specified tree container `enableIndex = true`.\n   * @returns The index subscript of the node in the tree.\n   * @example\n   * const st = new OrderedSet([1, 2, 3], true);\n   * console.log(st.begin().next().index);  // 1\n   */\n  get index() {\n    let _node = this._node as TreeNodeEnableIndex<K, V>;\n    const root = this._header._parent as TreeNodeEnableIndex<K, V>;\n    if (_node === this._header) {\n      if (root) {\n        return root._subTreeSize - 1;\n      }\n      return 0;\n    }\n    let index = 0;\n    if (_node._left) {\n      index += (_node._left as TreeNodeEnableIndex<K, V>)._subTreeSize;\n    }\n    while (_node !== root) {\n      const _parent = _node._parent as TreeNodeEnableIndex<K, V>;\n      if (_node === _parent._right) {\n        index += 1;\n        if (_parent._left) {\n          index += (_parent._left as TreeNodeEnableIndex<K, V>)._subTreeSize;\n        }\n      }\n      _node = _parent;\n    }\n    return index;\n  }\n  // @ts-ignore\n  pre(): this;\n  // @ts-ignore\n  next(): this;\n}\n\nexport default TreeIterator;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeNode.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeNode.d.ts
new file mode 100644
index 0000000..d0aec50
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeNode.d.ts
@@ -0,0 +1,47 @@
+export declare const enum TreeNodeColor {
+    RED = 1,
+    BLACK = 0
+}
+export declare class TreeNode<K, V> {
+    _color: TreeNodeColor;
+    _key: K | undefined;
+    _value: V | undefined;
+    _left: TreeNode<K, V> | undefined;
+    _right: TreeNode<K, V> | undefined;
+    _parent: TreeNode<K, V> | undefined;
+    constructor(key?: K, value?: V);
+    /**
+     * @description Get the pre node.
+     * @returns TreeNode about the pre node.
+     */
+    _pre(): TreeNode<K, V>;
+    /**
+     * @description Get the next node.
+     * @returns TreeNode about the next node.
+     */
+    _next(): TreeNode<K, V>;
+    /**
+     * @description Rotate left.
+     * @returns TreeNode about moved to original position after rotation.
+     */
+    _rotateLeft(): TreeNode<K, V>;
+    /**
+     * @description Rotate right.
+     * @returns TreeNode about moved to original position after rotation.
+     */
+    _rotateRight(): TreeNode<K, V>;
+}
+export declare class TreeNodeEnableIndex<K, V> extends TreeNode<K, V> {
+    _subTreeSize: number;
+    /**
+     * @description Rotate left and do recount.
+     * @returns TreeNode about moved to original position after rotation.
+     */
+    _rotateLeft(): TreeNodeEnableIndex<K, V>;
+    /**
+     * @description Rotate right and do recount.
+     * @returns TreeNode about moved to original position after rotation.
+     */
+    _rotateRight(): TreeNodeEnableIndex<K, V>;
+    _recount(): void;
+}
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeNode.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeNode.js
new file mode 100644
index 0000000..0b58346
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeNode.js
@@ -0,0 +1,132 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(e, n) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(e, n) {
+            e.__proto__ = n;
+        } || function(e, n) {
+            for (var t in n) if (Object.prototype.hasOwnProperty.call(n, t)) e[t] = n[t];
+        };
+        return extendStatics(e, n);
+    };
+    return function(e, n) {
+        if (typeof n !== "function" && n !== null) throw new TypeError("Class extends value " + String(n) + " is not a constructor or null");
+        extendStatics(e, n);
+        function __() {
+            this.constructor = e;
+        }
+        e.prototype = n === null ? Object.create(n) : (__.prototype = n.prototype, new __);
+    };
+}();
+
+var TreeNode = function() {
+    function TreeNode(e, n) {
+        this.ee = 1;
+        this.u = undefined;
+        this.p = undefined;
+        this.K = undefined;
+        this.N = undefined;
+        this.rr = undefined;
+        this.u = e;
+        this.p = n;
+    }
+    TreeNode.prototype.L = function() {
+        var e = this;
+        if (e.ee === 1 && e.rr.rr === e) {
+            e = e.N;
+        } else if (e.K) {
+            e = e.K;
+            while (e.N) {
+                e = e.N;
+            }
+        } else {
+            var n = e.rr;
+            while (n.K === e) {
+                e = n;
+                n = e.rr;
+            }
+            e = n;
+        }
+        return e;
+    };
+    TreeNode.prototype.m = function() {
+        var e = this;
+        if (e.N) {
+            e = e.N;
+            while (e.K) {
+                e = e.K;
+            }
+            return e;
+        } else {
+            var n = e.rr;
+            while (n.N === e) {
+                e = n;
+                n = e.rr;
+            }
+            if (e.N !== n) {
+                return n;
+            } else return e;
+        }
+    };
+    TreeNode.prototype.ne = function() {
+        var e = this.rr;
+        var n = this.N;
+        var t = n.K;
+        if (e.rr === this) e.rr = n; else if (e.K === this) e.K = n; else e.N = n;
+        n.rr = e;
+        n.K = this;
+        this.rr = n;
+        this.N = t;
+        if (t) t.rr = this;
+        return n;
+    };
+    TreeNode.prototype.te = function() {
+        var e = this.rr;
+        var n = this.K;
+        var t = n.N;
+        if (e.rr === this) e.rr = n; else if (e.K === this) e.K = n; else e.N = n;
+        n.rr = e;
+        n.N = this;
+        this.rr = n;
+        this.K = t;
+        if (t) t.rr = this;
+        return n;
+    };
+    return TreeNode;
+}();
+
+export { TreeNode };
+
+var TreeNodeEnableIndex = function(e) {
+    __extends(TreeNodeEnableIndex, e);
+    function TreeNodeEnableIndex() {
+        var n = e !== null && e.apply(this, arguments) || this;
+        n.tr = 1;
+        return n;
+    }
+    TreeNodeEnableIndex.prototype.ne = function() {
+        var n = e.prototype.ne.call(this);
+        this.ie();
+        n.ie();
+        return n;
+    };
+    TreeNodeEnableIndex.prototype.te = function() {
+        var n = e.prototype.te.call(this);
+        this.ie();
+        n.ie();
+        return n;
+    };
+    TreeNodeEnableIndex.prototype.ie = function() {
+        this.tr = 1;
+        if (this.K) {
+            this.tr += this.K.tr;
+        }
+        if (this.N) {
+            this.tr += this.N.tr;
+        }
+    };
+    return TreeNodeEnableIndex;
+}(TreeNode);
+
+export { TreeNodeEnableIndex };
+//# sourceMappingURL=TreeNode.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeNode.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeNode.js.map
new file mode 100644
index 0000000..c186e1e
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/TreeNode.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/TreeContainer/Base/TreeNode.js","../../src/container/TreeContainer/Base/TreeNode.ts"],"names":["__extends","this","extendStatics","d","b","Object","setPrototypeOf","__proto__","Array","p","prototype","hasOwnProperty","call","TypeError","String","__","constructor","create","TreeNode","key","value","_color","_key","undefined","_value","_left","_right","_parent","_pre","preNode","pre","_next","nextNode","_rotateLeft","PP","V","R","_rotateRight","F","K","TreeNodeEnableIndex","_super","_this","apply","arguments","_subTreeSize","parent","_recount"],"mappings":"AAAA,IAAIA,YAAaC,QAAQA,KAAKD,KAAe;IACzC,IAAIE,gBAAgB,SAAUC,GAAGC;QAC7BF,gBAAgBG,OAAOC,kBAClB;YAAEC,WAAW;qBAAgBC,SAAS,SAAUL,GAAGC;YAAKD,EAAEI,YAAYH;AAAG,aAC1E,SAAUD,GAAGC;YAAK,KAAK,IAAIK,KAAKL,GAAG,IAAIC,OAAOK,UAAUC,eAAeC,KAAKR,GAAGK,IAAIN,EAAEM,KAAKL,EAAEK;AAAI;QACpG,OAAOP,cAAcC,GAAGC;AAC5B;IACA,OAAO,SAAUD,GAAGC;QAChB,WAAWA,MAAM,cAAcA,MAAM,MACjC,MAAM,IAAIS,UAAU,yBAAyBC,OAAOV,KAAK;QAC7DF,cAAcC,GAAGC;QACjB,SAASW;YAAOd,KAAKe,cAAcb;AAAG;QACtCA,EAAEO,YAAYN,MAAM,OAAOC,OAAOY,OAAOb,MAAMW,GAAGL,YAAYN,EAAEM,WAAW,IAAIK;AACnF;AACJ,CAd6C;;ACK7C,IAAAG,WAAA;IAOE,SAAAA,SAAYC,GAASC;QANrBnB,KAAAoB,KAAM;QACNpB,KAAAqB,IAAsBC;QACtBtB,KAAAuB,IAAwBD;QACxBtB,KAAAwB,IAAoCF;QACpCtB,KAAAyB,IAAqCH;QACrCtB,KAAA0B,KAAsCJ;QAEpCtB,KAAKqB,IAAOH;QACZlB,KAAKuB,IAASJ;ADWd;ICLFF,SAAAR,UAAAkB,IAAA;QACE,IAAIC,IAA0B5B;QAC9B,IACE4B,EAAQR,OAAM,KACdQ,EAAQF,GAASA,OAAYE,GAC7B;YACAA,IAAUA,EAAQH;ADShB,eCRG,IAAIG,EAAQJ,GAAO;YACxBI,IAAUA,EAAQJ;YAClB,OAAOI,EAAQH,GAAQ;gBACrBG,IAAUA,EAAQH;ADUd;AACJ,eCTG;YACL,IAAII,IAAMD,EAAQF;YAClB,OAAOG,EAAIL,MAAUI,GAAS;gBAC5BA,IAAUC;gBACVA,IAAMD,EAAQF;ADWV;YCTNE,IAAUC;ADWR;QCTJ,OAAOD;ADWP;ICLFX,SAAAR,UAAAqB,IAAA;QACE,IAAIC,IAA2B/B;QAC/B,IAAI+B,EAASN,GAAQ;YACnBM,IAAWA,EAASN;YACpB,OAAOM,EAASP,GAAO;gBACrBO,IAAWA,EAASP;ADWhB;YCTN,OAAOO;ADWL,eCVG;YACL,IAAIF,IAAME,EAASL;YACnB,OAAOG,EAAIJ,MAAWM,GAAU;gBAC9BA,IAAWF;gBACXA,IAAME,EAASL;ADYX;YCVN,IAAIK,EAASN,MAAWI,GAAK;gBAC3B,OAAOA;ADYH,mBCXC,OAAOE;ADcZ;AACJ;ICRFd,SAAAR,UAAAuB,KAAA;QACE,IAAMC,IAAKjC,KAAK0B;QAChB,IAAMQ,IAAIlC,KAAKyB;QACf,IAAMU,IAAID,EAAEV;QAEZ,IAAIS,EAAGP,OAAY1B,MAAMiC,EAAGP,KAAUQ,QACjC,IAAID,EAAGT,MAAUxB,MAAMiC,EAAGT,IAAQU,QAClCD,EAAGR,IAASS;QAEjBA,EAAER,KAAUO;QACZC,EAAEV,IAAQxB;QAEVA,KAAK0B,KAAUQ;QACflC,KAAKyB,IAASU;QAEd,IAAIA,GAAGA,EAAET,KAAU1B;QAEnB,OAAOkC;ADaP;ICPFjB,SAAAR,UAAA2B,KAAA;QACE,IAAMH,IAAKjC,KAAK0B;QAChB,IAAMW,IAAIrC,KAAKwB;QACf,IAAMc,IAAID,EAAEZ;QAEZ,IAAIQ,EAAGP,OAAY1B,MAAMiC,EAAGP,KAAUW,QACjC,IAAIJ,EAAGT,MAAUxB,MAAMiC,EAAGT,IAAQa,QAClCJ,EAAGR,IAASY;QAEjBA,EAAEX,KAAUO;QACZI,EAAEZ,IAASzB;QAEXA,KAAK0B,KAAUW;QACfrC,KAAKwB,IAAQc;QAEb,IAAIA,GAAGA,EAAEZ,KAAU1B;QAEnB,OAAOqC;ADYP;ICVJ,OAAApB;AAAA,CA1GA;;SDuHSA;;ACXT,IAAAsB,sBAAA,SAAAC;IAA+CzC,UAAAwC,qBAAAC;IAA/C,SAAAD;QAAA,IAAAE,IAAAD,MAAA,QAAAA,EAAAE,MAAA1C,MAAA2C,cAAA3C;QACEyC,EAAAG,KAAe;QDgBT,OAAOH;ACcf;IAzBEF,oBAAA9B,UAAAuB,KAAA;QACE,IAAMa,IAASL,EAAA/B,UAAMuB,GAAWrB,KAAAX;QAChCA,KAAK8C;QACLD,EAAOC;QACP,OAAOD;ADkBP;ICZFN,oBAAA9B,UAAA2B,KAAA;QACE,IAAMS,IAASL,EAAA/B,UAAM2B,GAAYzB,KAAAX;QACjCA,KAAK8C;QACLD,EAAOC;QACP,OAAOD;ADkBP;IChBFN,oBAAA9B,UAAAqC,KAAA;QACE9C,KAAK4C,KAAe;QACpB,IAAI5C,KAAKwB,GAAO;YACdxB,KAAK4C,MAAiB5C,KAAKwB,EAAoCoB;ADkB7D;QChBJ,IAAI5C,KAAKyB,GAAQ;YACfzB,KAAK4C,MAAiB5C,KAAKyB,EAAqCmB;ADkB9D;AACJ;IChBJ,OAAAL;AAAA,CA/BA,CAA+CtB;;SDkDtCsB","file":"TreeNode.js","sourcesContent":["var __extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nvar TreeNode = /** @class */ (function () {\n    function TreeNode(key, value) {\n        this._color = 1 /* TreeNodeColor.RED */;\n        this._key = undefined;\n        this._value = undefined;\n        this._left = undefined;\n        this._right = undefined;\n        this._parent = undefined;\n        this._key = key;\n        this._value = value;\n    }\n    /**\n     * @description Get the pre node.\n     * @returns TreeNode about the pre node.\n     */\n    TreeNode.prototype._pre = function () {\n        var preNode = this;\n        if (preNode._color === 1 /* TreeNodeColor.RED */ &&\n            preNode._parent._parent === preNode) {\n            preNode = preNode._right;\n        }\n        else if (preNode._left) {\n            preNode = preNode._left;\n            while (preNode._right) {\n                preNode = preNode._right;\n            }\n        }\n        else {\n            var pre = preNode._parent;\n            while (pre._left === preNode) {\n                preNode = pre;\n                pre = preNode._parent;\n            }\n            preNode = pre;\n        }\n        return preNode;\n    };\n    /**\n     * @description Get the next node.\n     * @returns TreeNode about the next node.\n     */\n    TreeNode.prototype._next = function () {\n        var nextNode = this;\n        if (nextNode._right) {\n            nextNode = nextNode._right;\n            while (nextNode._left) {\n                nextNode = nextNode._left;\n            }\n            return nextNode;\n        }\n        else {\n            var pre = nextNode._parent;\n            while (pre._right === nextNode) {\n                nextNode = pre;\n                pre = nextNode._parent;\n            }\n            if (nextNode._right !== pre) {\n                return pre;\n            }\n            else\n                return nextNode;\n        }\n    };\n    /**\n     * @description Rotate left.\n     * @returns TreeNode about moved to original position after rotation.\n     */\n    TreeNode.prototype._rotateLeft = function () {\n        var PP = this._parent;\n        var V = this._right;\n        var R = V._left;\n        if (PP._parent === this)\n            PP._parent = V;\n        else if (PP._left === this)\n            PP._left = V;\n        else\n            PP._right = V;\n        V._parent = PP;\n        V._left = this;\n        this._parent = V;\n        this._right = R;\n        if (R)\n            R._parent = this;\n        return V;\n    };\n    /**\n     * @description Rotate right.\n     * @returns TreeNode about moved to original position after rotation.\n     */\n    TreeNode.prototype._rotateRight = function () {\n        var PP = this._parent;\n        var F = this._left;\n        var K = F._right;\n        if (PP._parent === this)\n            PP._parent = F;\n        else if (PP._left === this)\n            PP._left = F;\n        else\n            PP._right = F;\n        F._parent = PP;\n        F._right = this;\n        this._parent = F;\n        this._left = K;\n        if (K)\n            K._parent = this;\n        return F;\n    };\n    return TreeNode;\n}());\nexport { TreeNode };\nvar TreeNodeEnableIndex = /** @class */ (function (_super) {\n    __extends(TreeNodeEnableIndex, _super);\n    function TreeNodeEnableIndex() {\n        var _this = _super !== null && _super.apply(this, arguments) || this;\n        _this._subTreeSize = 1;\n        return _this;\n    }\n    /**\n     * @description Rotate left and do recount.\n     * @returns TreeNode about moved to original position after rotation.\n     */\n    TreeNodeEnableIndex.prototype._rotateLeft = function () {\n        var parent = _super.prototype._rotateLeft.call(this);\n        this._recount();\n        parent._recount();\n        return parent;\n    };\n    /**\n     * @description Rotate right and do recount.\n     * @returns TreeNode about moved to original position after rotation.\n     */\n    TreeNodeEnableIndex.prototype._rotateRight = function () {\n        var parent = _super.prototype._rotateRight.call(this);\n        this._recount();\n        parent._recount();\n        return parent;\n    };\n    TreeNodeEnableIndex.prototype._recount = function () {\n        this._subTreeSize = 1;\n        if (this._left) {\n            this._subTreeSize += this._left._subTreeSize;\n        }\n        if (this._right) {\n            this._subTreeSize += this._right._subTreeSize;\n        }\n    };\n    return TreeNodeEnableIndex;\n}(TreeNode));\nexport { TreeNodeEnableIndex };\n","export const enum TreeNodeColor {\n  RED = 1,\n  BLACK = 0\n}\n\nexport class TreeNode<K, V> {\n  _color = TreeNodeColor.RED;\n  _key: K | undefined = undefined;\n  _value: V | undefined = undefined;\n  _left: TreeNode<K, V> | undefined = undefined;\n  _right: TreeNode<K, V> | undefined = undefined;\n  _parent: TreeNode<K, V> | undefined = undefined;\n  constructor(key?: K, value?: V) {\n    this._key = key;\n    this._value = value;\n  }\n  /**\n   * @description Get the pre node.\n   * @returns TreeNode about the pre node.\n   */\n  _pre() {\n    let preNode: TreeNode<K, V> = this;\n    if (\n      preNode._color === TreeNodeColor.RED &&\n      preNode._parent!._parent === preNode\n    ) {\n      preNode = preNode._right!;\n    } else if (preNode._left) {\n      preNode = preNode._left;\n      while (preNode._right) {\n        preNode = preNode._right;\n      }\n    } else {\n      let pre = preNode._parent!;\n      while (pre._left === preNode) {\n        preNode = pre;\n        pre = preNode._parent!;\n      }\n      preNode = pre;\n    }\n    return preNode;\n  }\n  /**\n   * @description Get the next node.\n   * @returns TreeNode about the next node.\n   */\n  _next() {\n    let nextNode: TreeNode<K, V> = this;\n    if (nextNode._right) {\n      nextNode = nextNode._right;\n      while (nextNode._left) {\n        nextNode = nextNode._left;\n      }\n      return nextNode;\n    } else {\n      let pre = nextNode._parent!;\n      while (pre._right === nextNode) {\n        nextNode = pre;\n        pre = nextNode._parent!;\n      }\n      if (nextNode._right !== pre) {\n        return pre;\n      } else return nextNode;\n    }\n  }\n  /**\n   * @description Rotate left.\n   * @returns TreeNode about moved to original position after rotation.\n   */\n  _rotateLeft() {\n    const PP = this._parent!;\n    const V = this._right!;\n    const R = V._left;\n\n    if (PP._parent === this) PP._parent = V;\n    else if (PP._left === this) PP._left = V;\n    else PP._right = V;\n\n    V._parent = PP;\n    V._left = this;\n\n    this._parent = V;\n    this._right = R;\n\n    if (R) R._parent = this;\n\n    return V;\n  }\n  /**\n   * @description Rotate right.\n   * @returns TreeNode about moved to original position after rotation.\n   */\n  _rotateRight() {\n    const PP = this._parent!;\n    const F = this._left!;\n    const K = F._right;\n\n    if (PP._parent === this) PP._parent = F;\n    else if (PP._left === this) PP._left = F;\n    else PP._right = F;\n\n    F._parent = PP;\n    F._right = this;\n\n    this._parent = F;\n    this._left = K;\n\n    if (K) K._parent = this;\n\n    return F;\n  }\n}\n\nexport class TreeNodeEnableIndex<K, V> extends TreeNode<K, V> {\n  _subTreeSize = 1;\n  /**\n   * @description Rotate left and do recount.\n   * @returns TreeNode about moved to original position after rotation.\n   */\n  _rotateLeft() {\n    const parent = super._rotateLeft() as TreeNodeEnableIndex<K, V>;\n    this._recount();\n    parent._recount();\n    return parent;\n  }\n  /**\n   * @description Rotate right and do recount.\n   * @returns TreeNode about moved to original position after rotation.\n   */\n  _rotateRight() {\n    const parent = super._rotateRight() as TreeNodeEnableIndex<K, V>;\n    this._recount();\n    parent._recount();\n    return parent;\n  }\n  _recount() {\n    this._subTreeSize = 1;\n    if (this._left) {\n      this._subTreeSize += (this._left as TreeNodeEnableIndex<K, V>)._subTreeSize;\n    }\n    if (this._right) {\n      this._subTreeSize += (this._right as TreeNodeEnableIndex<K, V>)._subTreeSize;\n    }\n  }\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/index.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/index.d.ts
new file mode 100644
index 0000000..96e4792
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/index.d.ts
@@ -0,0 +1,58 @@
+import type TreeIterator from './TreeIterator';
+import { Container } from "../../ContainerBase";
+declare abstract class TreeContainer<K, V> extends Container<K | [K, V]> {
+    clear(): void;
+    /**
+     * @description Update node's key by iterator.
+     * @param iter - The iterator you want to change.
+     * @param key - The key you want to update.
+     * @returns Whether the modification is successful.
+     * @example
+     * const st = new orderedSet([1, 2, 5]);
+     * const iter = st.find(2);
+     * st.updateKeyByIterator(iter, 3); // then st will become [1, 3, 5]
+     */
+    updateKeyByIterator(iter: TreeIterator<K, V>, key: K): boolean;
+    eraseElementByPos(pos: number): number;
+    /**
+     * @description Remove the element of the specified key.
+     * @param key - The key you want to remove.
+     * @returns Whether erase successfully.
+     */
+    eraseElementByKey(key: K): boolean;
+    eraseElementByIterator(iter: TreeIterator<K, V>): TreeIterator<K, V>;
+    forEach(callback: (element: K | [K, V], index: number, tree: TreeContainer<K, V>) => void): void;
+    getElementByPos(pos: number): K | [K, V];
+    /**
+     * @description Get the height of the tree.
+     * @returns Number about the height of the RB-tree.
+     */
+    getHeight(): number;
+    /**
+     * @param key - The given key you want to compare.
+     * @returns An iterator to the first element less than the given key.
+     */
+    abstract reverseUpperBound(key: K): TreeIterator<K, V>;
+    /**
+     * @description Union the other tree to self.
+     * @param other - The other tree container you want to merge.
+     * @returns The size of the tree after union.
+     */
+    abstract union(other: TreeContainer<K, V>): number;
+    /**
+     * @param key - The given key you want to compare.
+     * @returns An iterator to the first element not greater than the given key.
+     */
+    abstract reverseLowerBound(key: K): TreeIterator<K, V>;
+    /**
+     * @param key - The given key you want to compare.
+     * @returns An iterator to the first element not less than the given key.
+     */
+    abstract lowerBound(key: K): TreeIterator<K, V>;
+    /**
+     * @param key - The given key you want to compare.
+     * @returns An iterator to the first element greater than the given key.
+     */
+    abstract upperBound(key: K): TreeIterator<K, V>;
+}
+export default TreeContainer;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/index.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/index.js
new file mode 100644
index 0000000..5056baf
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/index.js
@@ -0,0 +1,600 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(e, r) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(e, r) {
+            e.__proto__ = r;
+        } || function(e, r) {
+            for (var i in r) if (Object.prototype.hasOwnProperty.call(r, i)) e[i] = r[i];
+        };
+        return extendStatics(e, r);
+    };
+    return function(e, r) {
+        if (typeof r !== "function" && r !== null) throw new TypeError("Class extends value " + String(r) + " is not a constructor or null");
+        extendStatics(e, r);
+        function __() {
+            this.constructor = e;
+        }
+        e.prototype = r === null ? Object.create(r) : (__.prototype = r.prototype, new __);
+    };
+}();
+
+var __read = this && this.q || function(e, r) {
+    var i = typeof Symbol === "function" && e[Symbol.iterator];
+    if (!i) return e;
+    var t = i.call(e), n, s = [], f;
+    try {
+        while ((r === void 0 || r-- > 0) && !(n = t.next()).done) s.push(n.value);
+    } catch (e) {
+        f = {
+            error: e
+        };
+    } finally {
+        try {
+            if (n && !n.done && (i = t["return"])) i.call(t);
+        } finally {
+            if (f) throw f.error;
+        }
+    }
+    return s;
+};
+
+var __values = this && this.V || function(e) {
+    var r = typeof Symbol === "function" && Symbol.iterator, i = r && e[r], t = 0;
+    if (i) return i.call(e);
+    if (e && typeof e.length === "number") return {
+        next: function() {
+            if (e && t >= e.length) e = void 0;
+            return {
+                value: e && e[t++],
+                done: !e
+            };
+        }
+    };
+    throw new TypeError(r ? "Object is not iterable." : "Symbol.iterator is not defined.");
+};
+
+import { TreeNode, TreeNodeEnableIndex } from "./TreeNode";
+
+import { Container } from "../../ContainerBase";
+
+import { throwIteratorAccessError } from "../../../utils/throwError";
+
+var TreeContainer = function(e) {
+    __extends(TreeContainer, e);
+    function TreeContainer(r, i) {
+        if (r === void 0) {
+            r = function(e, r) {
+                if (e < r) return -1;
+                if (e > r) return 1;
+                return 0;
+            };
+        }
+        if (i === void 0) {
+            i = false;
+        }
+        var t = e.call(this) || this;
+        t.W = undefined;
+        t.$ = r;
+        if (i) {
+            t.re = TreeNodeEnableIndex;
+            t.v = function(e, r, i) {
+                var t = this.se(e, r, i);
+                if (t) {
+                    var n = t.rr;
+                    while (n !== this.h) {
+                        n.tr += 1;
+                        n = n.rr;
+                    }
+                    var s = this.fe(t);
+                    if (s) {
+                        var f = s, h = f.parentNode, u = f.grandParent, a = f.curNode;
+                        h.ie();
+                        u.ie();
+                        a.ie();
+                    }
+                }
+                return this.M;
+            };
+            t.G = function(e) {
+                var r = this.he(e);
+                while (r !== this.h) {
+                    r.tr -= 1;
+                    r = r.rr;
+                }
+            };
+        } else {
+            t.re = TreeNode;
+            t.v = function(e, r, i) {
+                var t = this.se(e, r, i);
+                if (t) this.fe(t);
+                return this.M;
+            };
+            t.G = t.he;
+        }
+        t.h = new t.re;
+        return t;
+    }
+    TreeContainer.prototype.U = function(e, r) {
+        var i = this.h;
+        while (e) {
+            var t = this.$(e.u, r);
+            if (t < 0) {
+                e = e.N;
+            } else if (t > 0) {
+                i = e;
+                e = e.K;
+            } else return e;
+        }
+        return i;
+    };
+    TreeContainer.prototype.X = function(e, r) {
+        var i = this.h;
+        while (e) {
+            var t = this.$(e.u, r);
+            if (t <= 0) {
+                e = e.N;
+            } else {
+                i = e;
+                e = e.K;
+            }
+        }
+        return i;
+    };
+    TreeContainer.prototype.Y = function(e, r) {
+        var i = this.h;
+        while (e) {
+            var t = this.$(e.u, r);
+            if (t < 0) {
+                i = e;
+                e = e.N;
+            } else if (t > 0) {
+                e = e.K;
+            } else return e;
+        }
+        return i;
+    };
+    TreeContainer.prototype.Z = function(e, r) {
+        var i = this.h;
+        while (e) {
+            var t = this.$(e.u, r);
+            if (t < 0) {
+                i = e;
+                e = e.N;
+            } else {
+                e = e.K;
+            }
+        }
+        return i;
+    };
+    TreeContainer.prototype.ue = function(e) {
+        while (true) {
+            var r = e.rr;
+            if (r === this.h) return;
+            if (e.ee === 1) {
+                e.ee = 0;
+                return;
+            }
+            if (e === r.K) {
+                var i = r.N;
+                if (i.ee === 1) {
+                    i.ee = 0;
+                    r.ee = 1;
+                    if (r === this.W) {
+                        this.W = r.ne();
+                    } else r.ne();
+                } else {
+                    if (i.N && i.N.ee === 1) {
+                        i.ee = r.ee;
+                        r.ee = 0;
+                        i.N.ee = 0;
+                        if (r === this.W) {
+                            this.W = r.ne();
+                        } else r.ne();
+                        return;
+                    } else if (i.K && i.K.ee === 1) {
+                        i.ee = 1;
+                        i.K.ee = 0;
+                        i.te();
+                    } else {
+                        i.ee = 1;
+                        e = r;
+                    }
+                }
+            } else {
+                var i = r.K;
+                if (i.ee === 1) {
+                    i.ee = 0;
+                    r.ee = 1;
+                    if (r === this.W) {
+                        this.W = r.te();
+                    } else r.te();
+                } else {
+                    if (i.K && i.K.ee === 1) {
+                        i.ee = r.ee;
+                        r.ee = 0;
+                        i.K.ee = 0;
+                        if (r === this.W) {
+                            this.W = r.te();
+                        } else r.te();
+                        return;
+                    } else if (i.N && i.N.ee === 1) {
+                        i.ee = 1;
+                        i.N.ee = 0;
+                        i.ne();
+                    } else {
+                        i.ee = 1;
+                        e = r;
+                    }
+                }
+            }
+        }
+    };
+    TreeContainer.prototype.he = function(e) {
+        var r, i;
+        if (this.M === 1) {
+            this.clear();
+            return this.h;
+        }
+        var t = e;
+        while (t.K || t.N) {
+            if (t.N) {
+                t = t.N;
+                while (t.K) t = t.K;
+            } else {
+                t = t.K;
+            }
+            r = __read([ t.u, e.u ], 2), e.u = r[0], t.u = r[1];
+            i = __read([ t.p, e.p ], 2), e.p = i[0], t.p = i[1];
+            e = t;
+        }
+        if (this.h.K === t) {
+            this.h.K = t.rr;
+        } else if (this.h.N === t) {
+            this.h.N = t.rr;
+        }
+        this.ue(t);
+        var n = t.rr;
+        if (t === n.K) {
+            n.K = undefined;
+        } else n.N = undefined;
+        this.M -= 1;
+        this.W.ee = 0;
+        return n;
+    };
+    TreeContainer.prototype.ae = function(e, r) {
+        if (e === undefined) return false;
+        var i = this.ae(e.K, r);
+        if (i) return true;
+        if (r(e)) return true;
+        return this.ae(e.N, r);
+    };
+    TreeContainer.prototype.fe = function(e) {
+        while (true) {
+            var r = e.rr;
+            if (r.ee === 0) return;
+            var i = r.rr;
+            if (r === i.K) {
+                var t = i.N;
+                if (t && t.ee === 1) {
+                    t.ee = r.ee = 0;
+                    if (i === this.W) return;
+                    i.ee = 1;
+                    e = i;
+                    continue;
+                } else if (e === r.N) {
+                    e.ee = 0;
+                    if (e.K) e.K.rr = r;
+                    if (e.N) e.N.rr = i;
+                    r.N = e.K;
+                    i.K = e.N;
+                    e.K = r;
+                    e.N = i;
+                    if (i === this.W) {
+                        this.W = e;
+                        this.h.rr = e;
+                    } else {
+                        var n = i.rr;
+                        if (n.K === i) {
+                            n.K = e;
+                        } else n.N = e;
+                    }
+                    e.rr = i.rr;
+                    r.rr = e;
+                    i.rr = e;
+                    i.ee = 1;
+                    return {
+                        parentNode: r,
+                        grandParent: i,
+                        curNode: e
+                    };
+                } else {
+                    r.ee = 0;
+                    if (i === this.W) {
+                        this.W = i.te();
+                    } else i.te();
+                    i.ee = 1;
+                }
+            } else {
+                var t = i.K;
+                if (t && t.ee === 1) {
+                    t.ee = r.ee = 0;
+                    if (i === this.W) return;
+                    i.ee = 1;
+                    e = i;
+                    continue;
+                } else if (e === r.K) {
+                    e.ee = 0;
+                    if (e.K) e.K.rr = i;
+                    if (e.N) e.N.rr = r;
+                    i.N = e.K;
+                    r.K = e.N;
+                    e.K = i;
+                    e.N = r;
+                    if (i === this.W) {
+                        this.W = e;
+                        this.h.rr = e;
+                    } else {
+                        var n = i.rr;
+                        if (n.K === i) {
+                            n.K = e;
+                        } else n.N = e;
+                    }
+                    e.rr = i.rr;
+                    r.rr = e;
+                    i.rr = e;
+                    i.ee = 1;
+                    return {
+                        parentNode: r,
+                        grandParent: i,
+                        curNode: e
+                    };
+                } else {
+                    r.ee = 0;
+                    if (i === this.W) {
+                        this.W = i.ne();
+                    } else i.ne();
+                    i.ee = 1;
+                }
+            }
+            return;
+        }
+    };
+    TreeContainer.prototype.se = function(e, r, i) {
+        if (this.W === undefined) {
+            this.M += 1;
+            this.W = new this.re(e, r);
+            this.W.ee = 0;
+            this.W.rr = this.h;
+            this.h.rr = this.W;
+            this.h.K = this.W;
+            this.h.N = this.W;
+            return;
+        }
+        var t;
+        var n = this.h.K;
+        var s = this.$(n.u, e);
+        if (s === 0) {
+            n.p = r;
+            return;
+        } else if (s > 0) {
+            n.K = new this.re(e, r);
+            n.K.rr = n;
+            t = n.K;
+            this.h.K = t;
+        } else {
+            var f = this.h.N;
+            var h = this.$(f.u, e);
+            if (h === 0) {
+                f.p = r;
+                return;
+            } else if (h < 0) {
+                f.N = new this.re(e, r);
+                f.N.rr = f;
+                t = f.N;
+                this.h.N = t;
+            } else {
+                if (i !== undefined) {
+                    var u = i.o;
+                    if (u !== this.h) {
+                        var a = this.$(u.u, e);
+                        if (a === 0) {
+                            u.p = r;
+                            return;
+                        } else if (a > 0) {
+                            var o = u.L();
+                            var l = this.$(o.u, e);
+                            if (l === 0) {
+                                o.p = r;
+                                return;
+                            } else if (l < 0) {
+                                t = new this.re(e, r);
+                                if (o.N === undefined) {
+                                    o.N = t;
+                                    t.rr = o;
+                                } else {
+                                    u.K = t;
+                                    t.rr = u;
+                                }
+                            }
+                        }
+                    }
+                }
+                if (t === undefined) {
+                    t = this.W;
+                    while (true) {
+                        var v = this.$(t.u, e);
+                        if (v > 0) {
+                            if (t.K === undefined) {
+                                t.K = new this.re(e, r);
+                                t.K.rr = t;
+                                t = t.K;
+                                break;
+                            }
+                            t = t.K;
+                        } else if (v < 0) {
+                            if (t.N === undefined) {
+                                t.N = new this.re(e, r);
+                                t.N.rr = t;
+                                t = t.N;
+                                break;
+                            }
+                            t = t.N;
+                        } else {
+                            t.p = r;
+                            return;
+                        }
+                    }
+                }
+            }
+        }
+        this.M += 1;
+        return t;
+    };
+    TreeContainer.prototype.g = function(e, r) {
+        while (e) {
+            var i = this.$(e.u, r);
+            if (i < 0) {
+                e = e.N;
+            } else if (i > 0) {
+                e = e.K;
+            } else return e;
+        }
+        return e || this.h;
+    };
+    TreeContainer.prototype.clear = function() {
+        this.M = 0;
+        this.W = undefined;
+        this.h.rr = undefined;
+        this.h.K = this.h.N = undefined;
+    };
+    TreeContainer.prototype.updateKeyByIterator = function(e, r) {
+        var i = e.o;
+        if (i === this.h) {
+            throwIteratorAccessError();
+        }
+        if (this.M === 1) {
+            i.u = r;
+            return true;
+        }
+        if (i === this.h.K) {
+            if (this.$(i.m().u, r) > 0) {
+                i.u = r;
+                return true;
+            }
+            return false;
+        }
+        if (i === this.h.N) {
+            if (this.$(i.L().u, r) < 0) {
+                i.u = r;
+                return true;
+            }
+            return false;
+        }
+        var t = i.L().u;
+        if (this.$(t, r) >= 0) return false;
+        var n = i.m().u;
+        if (this.$(n, r) <= 0) return false;
+        i.u = r;
+        return true;
+    };
+    TreeContainer.prototype.eraseElementByPos = function(e) {
+        if (e < 0 || e > this.M - 1) {
+            throw new RangeError;
+        }
+        var r = 0;
+        var i = this;
+        this.ae(this.W, (function(t) {
+            if (e === r) {
+                i.G(t);
+                return true;
+            }
+            r += 1;
+            return false;
+        }));
+        return this.M;
+    };
+    TreeContainer.prototype.eraseElementByKey = function(e) {
+        if (this.M === 0) return false;
+        var r = this.g(this.W, e);
+        if (r === this.h) return false;
+        this.G(r);
+        return true;
+    };
+    TreeContainer.prototype.eraseElementByIterator = function(e) {
+        var r = e.o;
+        if (r === this.h) {
+            throwIteratorAccessError();
+        }
+        var i = r.N === undefined;
+        var t = e.iteratorType === 0;
+        if (t) {
+            if (i) e.next();
+        } else {
+            if (!i || r.K === undefined) e.next();
+        }
+        this.G(r);
+        return e;
+    };
+    TreeContainer.prototype.forEach = function(e) {
+        var r, i;
+        var t = 0;
+        try {
+            for (var n = __values(this), s = n.next(); !s.done; s = n.next()) {
+                var f = s.value;
+                e(f, t++, this);
+            }
+        } catch (e) {
+            r = {
+                error: e
+            };
+        } finally {
+            try {
+                if (s && !s.done && (i = n.return)) i.call(n);
+            } finally {
+                if (r) throw r.error;
+            }
+        }
+    };
+    TreeContainer.prototype.getElementByPos = function(e) {
+        var r, i;
+        if (e < 0 || e > this.M - 1) {
+            throw new RangeError;
+        }
+        var t;
+        var n = 0;
+        try {
+            for (var s = __values(this), f = s.next(); !f.done; f = s.next()) {
+                var h = f.value;
+                if (n === e) {
+                    t = h;
+                    break;
+                }
+                n += 1;
+            }
+        } catch (e) {
+            r = {
+                error: e
+            };
+        } finally {
+            try {
+                if (f && !f.done && (i = s.return)) i.call(s);
+            } finally {
+                if (r) throw r.error;
+            }
+        }
+        return t;
+    };
+    TreeContainer.prototype.getHeight = function() {
+        if (this.M === 0) return 0;
+        var traversal = function(e) {
+            if (!e) return 0;
+            return Math.max(traversal(e.K), traversal(e.N)) + 1;
+        };
+        return traversal(this.W);
+    };
+    return TreeContainer;
+}(Container);
+
+export default TreeContainer;
+//# sourceMappingURL=index.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/index.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/index.js.map
new file mode 100644
index 0000000..bbfc2ff
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/Base/index.js.map
@@ -0,0 +1 @@
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__extends = (this && this.__extends) || (function () {\n    var extendStatics = function (d, b) {\n        extendStatics = Object.setPrototypeOf ||\n            ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n            function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };\n        return extendStatics(d, b);\n    };\n    return function (d, b) {\n        if (typeof b !== \"function\" && b !== null)\n            throw new TypeError(\"Class extends value \" + String(b) + \" is not a constructor or null\");\n        extendStatics(d, b);\n        function __() { this.constructor = d; }\n        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nvar __read = (this && this.__read) || function (o, n) {\n    var m = typeof Symbol === \"function\" && o[Symbol.iterator];\n    if (!m) return o;\n    var i = m.call(o), r, ar = [], e;\n    try {\n        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);\n    }\n    catch (error) { e = { error: error }; }\n    finally {\n        try {\n            if (r && !r.done && (m = i[\"return\"])) m.call(i);\n        }\n        finally { if (e) throw e.error; }\n    }\n    return ar;\n};\nvar __values = (this && this.__values) || function(o) {\n    var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\n    if (m) return m.call(o);\n    if (o && typeof o.length === \"number\") return {\n        next: function () {\n            if (o && i >= o.length) o = void 0;\n            return { value: o && o[i++], done: !o };\n        }\n    };\n    throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\n};\nimport { TreeNode, TreeNodeEnableIndex } from './TreeNode';\nimport { Container } from \"../../ContainerBase\";\nimport $checkWithinAccessParams from \"../../../utils/checkParams.macro\";\nimport { throwIteratorAccessError } from \"../../../utils/throwError\";\nvar TreeContainer = /** @class */ (function (_super) {\n    __extends(TreeContainer, _super);\n    /**\n     * @internal\n     */\n    function TreeContainer(cmp, enableIndex) {\n        if (cmp === void 0) { cmp = function (x, y) {\n            if (x < y)\n                return -1;\n            if (x > y)\n                return 1;\n            return 0;\n        }; }\n        if (enableIndex === void 0) { enableIndex = false; }\n        var _this = _super.call(this) || this;\n        /**\n         * @internal\n         */\n        _this._root = undefined;\n        _this._cmp = cmp;\n        if (enableIndex) {\n            _this._TreeNodeClass = TreeNodeEnableIndex;\n            _this._set = function (key, value, hint) {\n                var curNode = this._preSet(key, value, hint);\n                if (curNode) {\n                    var p = curNode._parent;\n                    while (p !== this._header) {\n                        p._subTreeSize += 1;\n                        p = p._parent;\n                    }\n                    var nodeList = this._insertNodeSelfBalance(curNode);\n                    if (nodeList) {\n                        var _a = nodeList, parentNode = _a.parentNode, grandParent = _a.grandParent, curNode_1 = _a.curNode;\n                        parentNode._recount();\n                        grandParent._recount();\n                        curNode_1._recount();\n                    }\n                }\n                return this._length;\n            };\n            _this._eraseNode = function (curNode) {\n                var p = this._preEraseNode(curNode);\n                while (p !== this._header) {\n                    p._subTreeSize -= 1;\n                    p = p._parent;\n                }\n            };\n        }\n        else {\n            _this._TreeNodeClass = TreeNode;\n            _this._set = function (key, value, hint) {\n                var curNode = this._preSet(key, value, hint);\n                if (curNode)\n                    this._insertNodeSelfBalance(curNode);\n                return this._length;\n            };\n            _this._eraseNode = _this._preEraseNode;\n        }\n        _this._header = new _this._TreeNodeClass();\n        return _this;\n    }\n    /**\n     * @internal\n     */\n    TreeContainer.prototype._lowerBound = function (curNode, key) {\n        var resNode = this._header;\n        while (curNode) {\n            var cmpResult = this._cmp(curNode._key, key);\n            if (cmpResult < 0) {\n                curNode = curNode._right;\n            }\n            else if (cmpResult > 0) {\n                resNode = curNode;\n                curNode = curNode._left;\n            }\n            else\n                return curNode;\n        }\n        return resNode;\n    };\n    /**\n     * @internal\n     */\n    TreeContainer.prototype._upperBound = function (curNode, key) {\n        var resNode = this._header;\n        while (curNode) {\n            var cmpResult = this._cmp(curNode._key, key);\n            if (cmpResult <= 0) {\n                curNode = curNode._right;\n            }\n            else {\n                resNode = curNode;\n                curNode = curNode._left;\n            }\n        }\n        return resNode;\n    };\n    /**\n     * @internal\n     */\n    TreeContainer.prototype._reverseLowerBound = function (curNode, key) {\n        var resNode = this._header;\n        while (curNode) {\n            var cmpResult = this._cmp(curNode._key, key);\n            if (cmpResult < 0) {\n                resNode = curNode;\n                curNode = curNode._right;\n            }\n            else if (cmpResult > 0) {\n                curNode = curNode._left;\n            }\n            else\n                return curNode;\n        }\n        return resNode;\n    };\n    /**\n     * @internal\n     */\n    TreeContainer.prototype._reverseUpperBound = function (curNode, key) {\n        var resNode = this._header;\n        while (curNode) {\n            var cmpResult = this._cmp(curNode._key, key);\n            if (cmpResult < 0) {\n                resNode = curNode;\n                curNode = curNode._right;\n            }\n            else {\n                curNode = curNode._left;\n            }\n        }\n        return resNode;\n    };\n    /**\n     * @internal\n     */\n    TreeContainer.prototype._eraseNodeSelfBalance = function (curNode) {\n        while (true) {\n            var parentNode = curNode._parent;\n            if (parentNode === this._header)\n                return;\n            if (curNode._color === 1 /* TreeNodeColor.RED */) {\n                curNode._color = 0 /* TreeNodeColor.BLACK */;\n                return;\n            }\n            if (curNode === parentNode._left) {\n                var brother = parentNode._right;\n                if (brother._color === 1 /* TreeNodeColor.RED */) {\n                    brother._color = 0 /* TreeNodeColor.BLACK */;\n                    parentNode._color = 1 /* TreeNodeColor.RED */;\n                    if (parentNode === this._root) {\n                        this._root = parentNode._rotateLeft();\n                    }\n                    else\n                        parentNode._rotateLeft();\n                }\n                else {\n                    if (brother._right && brother._right._color === 1 /* TreeNodeColor.RED */) {\n                        brother._color = parentNode._color;\n                        parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                        brother._right._color = 0 /* TreeNodeColor.BLACK */;\n                        if (parentNode === this._root) {\n                            this._root = parentNode._rotateLeft();\n                        }\n                        else\n                            parentNode._rotateLeft();\n                        return;\n                    }\n                    else if (brother._left && brother._left._color === 1 /* TreeNodeColor.RED */) {\n                        brother._color = 1 /* TreeNodeColor.RED */;\n                        brother._left._color = 0 /* TreeNodeColor.BLACK */;\n                        brother._rotateRight();\n                    }\n                    else {\n                        brother._color = 1 /* TreeNodeColor.RED */;\n                        curNode = parentNode;\n                    }\n                }\n            }\n            else {\n                var brother = parentNode._left;\n                if (brother._color === 1 /* TreeNodeColor.RED */) {\n                    brother._color = 0 /* TreeNodeColor.BLACK */;\n                    parentNode._color = 1 /* TreeNodeColor.RED */;\n                    if (parentNode === this._root) {\n                        this._root = parentNode._rotateRight();\n                    }\n                    else\n                        parentNode._rotateRight();\n                }\n                else {\n                    if (brother._left && brother._left._color === 1 /* TreeNodeColor.RED */) {\n                        brother._color = parentNode._color;\n                        parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                        brother._left._color = 0 /* TreeNodeColor.BLACK */;\n                        if (parentNode === this._root) {\n                            this._root = parentNode._rotateRight();\n                        }\n                        else\n                            parentNode._rotateRight();\n                        return;\n                    }\n                    else if (brother._right && brother._right._color === 1 /* TreeNodeColor.RED */) {\n                        brother._color = 1 /* TreeNodeColor.RED */;\n                        brother._right._color = 0 /* TreeNodeColor.BLACK */;\n                        brother._rotateLeft();\n                    }\n                    else {\n                        brother._color = 1 /* TreeNodeColor.RED */;\n                        curNode = parentNode;\n                    }\n                }\n            }\n        }\n    };\n    /**\n     * @internal\n     */\n    TreeContainer.prototype._preEraseNode = function (curNode) {\n        var _a, _b;\n        if (this._length === 1) {\n            this.clear();\n            return this._header;\n        }\n        var swapNode = curNode;\n        while (swapNode._left || swapNode._right) {\n            if (swapNode._right) {\n                swapNode = swapNode._right;\n                while (swapNode._left)\n                    swapNode = swapNode._left;\n            }\n            else {\n                swapNode = swapNode._left;\n            }\n            _a = __read([swapNode._key, curNode._key], 2), curNode._key = _a[0], swapNode._key = _a[1];\n            _b = __read([swapNode._value, curNode._value], 2), curNode._value = _b[0], swapNode._value = _b[1];\n            curNode = swapNode;\n        }\n        if (this._header._left === swapNode) {\n            this._header._left = swapNode._parent;\n        }\n        else if (this._header._right === swapNode) {\n            this._header._right = swapNode._parent;\n        }\n        this._eraseNodeSelfBalance(swapNode);\n        var _parent = swapNode._parent;\n        if (swapNode === _parent._left) {\n            _parent._left = undefined;\n        }\n        else\n            _parent._right = undefined;\n        this._length -= 1;\n        this._root._color = 0 /* TreeNodeColor.BLACK */;\n        return _parent;\n    };\n    /**\n     * @internal\n     */\n    TreeContainer.prototype._inOrderTraversal = function (curNode, callback) {\n        if (curNode === undefined)\n            return false;\n        var ifReturn = this._inOrderTraversal(curNode._left, callback);\n        if (ifReturn)\n            return true;\n        if (callback(curNode))\n            return true;\n        return this._inOrderTraversal(curNode._right, callback);\n    };\n    /**\n     * @internal\n     */\n    TreeContainer.prototype._insertNodeSelfBalance = function (curNode) {\n        while (true) {\n            var parentNode = curNode._parent;\n            if (parentNode._color === 0 /* TreeNodeColor.BLACK */)\n                return;\n            var grandParent = parentNode._parent;\n            if (parentNode === grandParent._left) {\n                var uncle = grandParent._right;\n                if (uncle && uncle._color === 1 /* TreeNodeColor.RED */) {\n                    uncle._color = parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (grandParent === this._root)\n                        return;\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                    curNode = grandParent;\n                    continue;\n                }\n                else if (curNode === parentNode._right) {\n                    curNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (curNode._left)\n                        curNode._left._parent = parentNode;\n                    if (curNode._right)\n                        curNode._right._parent = grandParent;\n                    parentNode._right = curNode._left;\n                    grandParent._left = curNode._right;\n                    curNode._left = parentNode;\n                    curNode._right = grandParent;\n                    if (grandParent === this._root) {\n                        this._root = curNode;\n                        this._header._parent = curNode;\n                    }\n                    else {\n                        var GP = grandParent._parent;\n                        if (GP._left === grandParent) {\n                            GP._left = curNode;\n                        }\n                        else\n                            GP._right = curNode;\n                    }\n                    curNode._parent = grandParent._parent;\n                    parentNode._parent = curNode;\n                    grandParent._parent = curNode;\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                    return { parentNode: parentNode, grandParent: grandParent, curNode: curNode };\n                }\n                else {\n                    parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (grandParent === this._root) {\n                        this._root = grandParent._rotateRight();\n                    }\n                    else\n                        grandParent._rotateRight();\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                }\n            }\n            else {\n                var uncle = grandParent._left;\n                if (uncle && uncle._color === 1 /* TreeNodeColor.RED */) {\n                    uncle._color = parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (grandParent === this._root)\n                        return;\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                    curNode = grandParent;\n                    continue;\n                }\n                else if (curNode === parentNode._left) {\n                    curNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (curNode._left)\n                        curNode._left._parent = grandParent;\n                    if (curNode._right)\n                        curNode._right._parent = parentNode;\n                    grandParent._right = curNode._left;\n                    parentNode._left = curNode._right;\n                    curNode._left = grandParent;\n                    curNode._right = parentNode;\n                    if (grandParent === this._root) {\n                        this._root = curNode;\n                        this._header._parent = curNode;\n                    }\n                    else {\n                        var GP = grandParent._parent;\n                        if (GP._left === grandParent) {\n                            GP._left = curNode;\n                        }\n                        else\n                            GP._right = curNode;\n                    }\n                    curNode._parent = grandParent._parent;\n                    parentNode._parent = curNode;\n                    grandParent._parent = curNode;\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                    return { parentNode: parentNode, grandParent: grandParent, curNode: curNode };\n                }\n                else {\n                    parentNode._color = 0 /* TreeNodeColor.BLACK */;\n                    if (grandParent === this._root) {\n                        this._root = grandParent._rotateLeft();\n                    }\n                    else\n                        grandParent._rotateLeft();\n                    grandParent._color = 1 /* TreeNodeColor.RED */;\n                }\n            }\n            return;\n        }\n    };\n    /**\n     * @internal\n     */\n    TreeContainer.prototype._preSet = function (key, value, hint) {\n        if (this._root === undefined) {\n            this._length += 1;\n            this._root = new this._TreeNodeClass(key, value);\n            this._root._color = 0 /* TreeNodeColor.BLACK */;\n            this._root._parent = this._header;\n            this._header._parent = this._root;\n            this._header._left = this._root;\n            this._header._right = this._root;\n            return;\n        }\n        var curNode;\n        var minNode = this._header._left;\n        var compareToMin = this._cmp(minNode._key, key);\n        if (compareToMin === 0) {\n            minNode._value = value;\n            return;\n        }\n        else if (compareToMin > 0) {\n            minNode._left = new this._TreeNodeClass(key, value);\n            minNode._left._parent = minNode;\n            curNode = minNode._left;\n            this._header._left = curNode;\n        }\n        else {\n            var maxNode = this._header._right;\n            var compareToMax = this._cmp(maxNode._key, key);\n            if (compareToMax === 0) {\n                maxNode._value = value;\n                return;\n            }\n            else if (compareToMax < 0) {\n                maxNode._right = new this._TreeNodeClass(key, value);\n                maxNode._right._parent = maxNode;\n                curNode = maxNode._right;\n                this._header._right = curNode;\n            }\n            else {\n                if (hint !== undefined) {\n                    var iterNode = hint._node;\n                    if (iterNode !== this._header) {\n                        var iterCmpRes = this._cmp(iterNode._key, key);\n                        if (iterCmpRes === 0) {\n                            iterNode._value = value;\n                            return;\n                        }\n                        else /* istanbul ignore else */ if (iterCmpRes > 0) {\n                            var preNode = iterNode._pre();\n                            var preCmpRes = this._cmp(preNode._key, key);\n                            if (preCmpRes === 0) {\n                                preNode._value = value;\n                                return;\n                            }\n                            else if (preCmpRes < 0) {\n                                curNode = new this._TreeNodeClass(key, value);\n                                if (preNode._right === undefined) {\n                                    preNode._right = curNode;\n                                    curNode._parent = preNode;\n                                }\n                                else {\n                                    iterNode._left = curNode;\n                                    curNode._parent = iterNode;\n                                }\n                            }\n                        }\n                    }\n                }\n                if (curNode === undefined) {\n                    curNode = this._root;\n                    while (true) {\n                        var cmpResult = this._cmp(curNode._key, key);\n                        if (cmpResult > 0) {\n                            if (curNode._left === undefined) {\n                                curNode._left = new this._TreeNodeClass(key, value);\n                                curNode._left._parent = curNode;\n                                curNode = curNode._left;\n                                break;\n                            }\n                            curNode = curNode._left;\n                        }\n                        else if (cmpResult < 0) {\n                            if (curNode._right === undefined) {\n                                curNode._right = new this._TreeNodeClass(key, value);\n                                curNode._right._parent = curNode;\n                                curNode = curNode._right;\n                                break;\n                            }\n                            curNode = curNode._right;\n                        }\n                        else {\n                            curNode._value = value;\n                            return;\n                        }\n                    }\n                }\n            }\n        }\n        this._length += 1;\n        return curNode;\n    };\n    /**\n     * @internal\n     */\n    TreeContainer.prototype._findElementNode = function (curNode, key) {\n        while (curNode) {\n            var cmpResult = this._cmp(curNode._key, key);\n            if (cmpResult < 0) {\n                curNode = curNode._right;\n            }\n            else if (cmpResult > 0) {\n                curNode = curNode._left;\n            }\n            else\n                return curNode;\n        }\n        return curNode || this._header;\n    };\n    TreeContainer.prototype.clear = function () {\n        this._length = 0;\n        this._root = undefined;\n        this._header._parent = undefined;\n        this._header._left = this._header._right = undefined;\n    };\n    /**\n     * @description Update node's key by iterator.\n     * @param iter - The iterator you want to change.\n     * @param key - The key you want to update.\n     * @returns Whether the modification is successful.\n     * @example\n     * const st = new orderedSet([1, 2, 5]);\n     * const iter = st.find(2);\n     * st.updateKeyByIterator(iter, 3); // then st will become [1, 3, 5]\n     */\n    TreeContainer.prototype.updateKeyByIterator = function (iter, key) {\n        var node = iter._node;\n        if (node === this._header) {\n            throwIteratorAccessError();\n        }\n        if (this._length === 1) {\n            node._key = key;\n            return true;\n        }\n        if (node === this._header._left) {\n            if (this._cmp(node._next()._key, key) > 0) {\n                node._key = key;\n                return true;\n            }\n            return false;\n        }\n        if (node === this._header._right) {\n            if (this._cmp(node._pre()._key, key) < 0) {\n                node._key = key;\n                return true;\n            }\n            return false;\n        }\n        var preKey = node._pre()._key;\n        if (this._cmp(preKey, key) >= 0)\n            return false;\n        var nextKey = node._next()._key;\n        if (this._cmp(nextKey, key) <= 0)\n            return false;\n        node._key = key;\n        return true;\n    };\n    TreeContainer.prototype.eraseElementByPos = function (pos) {\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        var index = 0;\n        var self = this;\n        this._inOrderTraversal(this._root, function (curNode) {\n            if (pos === index) {\n                self._eraseNode(curNode);\n                return true;\n            }\n            index += 1;\n            return false;\n        });\n        return this._length;\n    };\n    /**\n     * @description Remove the element of the specified key.\n     * @param key - The key you want to remove.\n     * @returns Whether erase successfully.\n     */\n    TreeContainer.prototype.eraseElementByKey = function (key) {\n        if (this._length === 0)\n            return false;\n        var curNode = this._findElementNode(this._root, key);\n        if (curNode === this._header)\n            return false;\n        this._eraseNode(curNode);\n        return true;\n    };\n    TreeContainer.prototype.eraseElementByIterator = function (iter) {\n        var node = iter._node;\n        if (node === this._header) {\n            throwIteratorAccessError();\n        }\n        var hasNoRight = node._right === undefined;\n        var isNormal = iter.iteratorType === 0 /* IteratorType.NORMAL */;\n        // For the normal iterator, the `next` node will be swapped to `this` node when has right.\n        if (isNormal) {\n            // So we should move it to next when it's right is null.\n            if (hasNoRight)\n                iter.next();\n        }\n        else {\n            // For the reverse iterator, only when it doesn't have right and has left the `next` node will be swapped.\n            // So when it has right, or it is a leaf node we should move it to `next`.\n            if (!hasNoRight || node._left === undefined)\n                iter.next();\n        }\n        this._eraseNode(node);\n        return iter;\n    };\n    TreeContainer.prototype.forEach = function (callback) {\n        var e_1, _a;\n        var index = 0;\n        try {\n            for (var _b = __values(this), _c = _b.next(); !_c.done; _c = _b.next()) {\n                var element = _c.value;\n                callback(element, index++, this);\n            }\n        }\n        catch (e_1_1) { e_1 = { error: e_1_1 }; }\n        finally {\n            try {\n                if (_c && !_c.done && (_a = _b.return)) _a.call(_b);\n            }\n            finally { if (e_1) throw e_1.error; }\n        }\n    };\n    TreeContainer.prototype.getElementByPos = function (pos) {\n        var e_2, _a;\n        if (pos < 0 || pos > this._length - 1) {\n            throw new RangeError();\n        }\n        var res;\n        var index = 0;\n        try {\n            for (var _b = __values(this), _c = _b.next(); !_c.done; _c = _b.next()) {\n                var element = _c.value;\n                if (index === pos) {\n                    res = element;\n                    break;\n                }\n                index += 1;\n            }\n        }\n        catch (e_2_1) { e_2 = { error: e_2_1 }; }\n        finally {\n            try {\n                if (_c && !_c.done && (_a = _b.return)) _a.call(_b);\n            }\n            finally { if (e_2) throw e_2.error; }\n        }\n        return res;\n    };\n    /**\n     * @description Get the height of the tree.\n     * @returns Number about the height of the RB-tree.\n     */\n    TreeContainer.prototype.getHeight = function () {\n        if (this._length === 0)\n            return 0;\n        var traversal = function (curNode) {\n            if (!curNode)\n                return 0;\n            return Math.max(traversal(curNode._left), traversal(curNode._right)) + 1;\n        };\n        return traversal(this._root);\n    };\n    return TreeContainer;\n}(Container));\nexport default TreeContainer;\n","import type TreeIterator from './TreeIterator';\nimport { TreeNode, TreeNodeColor, TreeNodeEnableIndex } from './TreeNode';\nimport { Container, IteratorType } from '@/container/ContainerBase';\nimport $checkWithinAccessParams from '@/utils/checkParams.macro';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nabstract class TreeContainer<K, V> extends Container<K | [K, V]> {\n  /**\n   * @internal\n   */\n  protected _root: TreeNode<K, V> | undefined = undefined;\n  /**\n   * @internal\n   */\n  protected _header: TreeNode<K, V>;\n  /**\n   * @internal\n   */\n  protected readonly _cmp: (x: K, y: K) => number;\n  /**\n   * @internal\n   */\n  protected readonly _TreeNodeClass: typeof TreeNode | typeof TreeNodeEnableIndex;\n  /**\n   * @internal\n   */\n  protected readonly _eraseNode: (curNode: TreeNode<K, V>) => void;\n  /**\n   * @internal\n   */\n  protected _set: (key: K, value: V, hint?: TreeIterator<K, V>) => number;\n  /**\n   * @internal\n   */\n  protected constructor(\n    cmp: (x: K, y: K) => number =\n    function (x: K, y: K) {\n      if (x < y) return -1;\n      if (x > y) return 1;\n      return 0;\n    },\n    enableIndex = false\n  ) {\n    super();\n    this._cmp = cmp;\n    if (enableIndex) {\n      this._TreeNodeClass = TreeNodeEnableIndex;\n      this._set = function (key, value, hint) {\n        const curNode = this._preSet(key, value, hint);\n        if (curNode) {\n          let p = curNode._parent as TreeNodeEnableIndex<K, V>;\n          while (p !== this._header) {\n            p._subTreeSize += 1;\n            p = p._parent as TreeNodeEnableIndex<K, V>;\n          }\n          const nodeList = this._insertNodeSelfBalance(curNode);\n          if (nodeList) {\n            const {\n              parentNode,\n              grandParent,\n              curNode\n            } = nodeList as unknown as Record<string, TreeNodeEnableIndex<K, V>>;\n            parentNode._recount();\n            grandParent._recount();\n            curNode._recount();\n          }\n        }\n        return this._length;\n      };\n      this._eraseNode = function (curNode) {\n        let p = this._preEraseNode(curNode) as TreeNodeEnableIndex<K, V>;\n        while (p !== this._header) {\n          p._subTreeSize -= 1;\n          p = p._parent as TreeNodeEnableIndex<K, V>;\n        }\n      };\n    } else {\n      this._TreeNodeClass = TreeNode;\n      this._set = function (key, value, hint) {\n        const curNode = this._preSet(key, value, hint);\n        if (curNode) this._insertNodeSelfBalance(curNode);\n        return this._length;\n      };\n      this._eraseNode = this._preEraseNode;\n    }\n    this._header = new this._TreeNodeClass();\n  }\n  /**\n   * @internal\n   */\n  protected _lowerBound(curNode: TreeNode<K, V> | undefined, key: K) {\n    let resNode = this._header;\n    while (curNode) {\n      const cmpResult = this._cmp(curNode._key!, key);\n      if (cmpResult < 0) {\n        curNode = curNode._right;\n      } else if (cmpResult > 0) {\n        resNode = curNode;\n        curNode = curNode._left;\n      } else return curNode;\n    }\n    return resNode;\n  }\n  /**\n   * @internal\n   */\n  protected _upperBound(curNode: TreeNode<K, V> | undefined, key: K) {\n    let resNode = this._header;\n    while (curNode) {\n      const cmpResult = this._cmp(curNode._key!, key);\n      if (cmpResult <= 0) {\n        curNode = curNode._right;\n      } else {\n        resNode = curNode;\n        curNode = curNode._left;\n      }\n    }\n    return resNode;\n  }\n  /**\n   * @internal\n   */\n  protected _reverseLowerBound(curNode: TreeNode<K, V> | undefined, key: K) {\n    let resNode = this._header;\n    while (curNode) {\n      const cmpResult = this._cmp(curNode._key!, key);\n      if (cmpResult < 0) {\n        resNode = curNode;\n        curNode = curNode._right;\n      } else if (cmpResult > 0) {\n        curNode = curNode._left;\n      } else return curNode;\n    }\n    return resNode;\n  }\n  /**\n   * @internal\n   */\n  protected _reverseUpperBound(curNode: TreeNode<K, V> | undefined, key: K) {\n    let resNode = this._header;\n    while (curNode) {\n      const cmpResult = this._cmp(curNode._key!, key);\n      if (cmpResult < 0) {\n        resNode = curNode;\n        curNode = curNode._right;\n      } else {\n        curNode = curNode._left;\n      }\n    }\n    return resNode;\n  }\n  /**\n   * @internal\n   */\n  protected _eraseNodeSelfBalance(curNode: TreeNode<K, V>) {\n    while (true) {\n      const parentNode = curNode._parent!;\n      if (parentNode === this._header) return;\n      if (curNode._color === TreeNodeColor.RED) {\n        curNode._color = TreeNodeColor.BLACK;\n        return;\n      }\n      if (curNode === parentNode._left) {\n        const brother = parentNode._right!;\n        if (brother._color === TreeNodeColor.RED) {\n          brother._color = TreeNodeColor.BLACK;\n          parentNode._color = TreeNodeColor.RED;\n          if (parentNode === this._root) {\n            this._root = parentNode._rotateLeft();\n          } else parentNode._rotateLeft();\n        } else {\n          if (brother._right && brother._right._color === TreeNodeColor.RED) {\n            brother._color = parentNode._color;\n            parentNode._color = TreeNodeColor.BLACK;\n            brother._right._color = TreeNodeColor.BLACK;\n            if (parentNode === this._root) {\n              this._root = parentNode._rotateLeft();\n            } else parentNode._rotateLeft();\n            return;\n          } else if (brother._left && brother._left._color === TreeNodeColor.RED) {\n            brother._color = TreeNodeColor.RED;\n            brother._left._color = TreeNodeColor.BLACK;\n            brother._rotateRight();\n          } else {\n            brother._color = TreeNodeColor.RED;\n            curNode = parentNode;\n          }\n        }\n      } else {\n        const brother = parentNode._left!;\n        if (brother._color === TreeNodeColor.RED) {\n          brother._color = TreeNodeColor.BLACK;\n          parentNode._color = TreeNodeColor.RED;\n          if (parentNode === this._root) {\n            this._root = parentNode._rotateRight();\n          } else parentNode._rotateRight();\n        } else {\n          if (brother._left && brother._left._color === TreeNodeColor.RED) {\n            brother._color = parentNode._color;\n            parentNode._color = TreeNodeColor.BLACK;\n            brother._left._color = TreeNodeColor.BLACK;\n            if (parentNode === this._root) {\n              this._root = parentNode._rotateRight();\n            } else parentNode._rotateRight();\n            return;\n          } else if (brother._right && brother._right._color === TreeNodeColor.RED) {\n            brother._color = TreeNodeColor.RED;\n            brother._right._color = TreeNodeColor.BLACK;\n            brother._rotateLeft();\n          } else {\n            brother._color = TreeNodeColor.RED;\n            curNode = parentNode;\n          }\n        }\n      }\n    }\n  }\n  /**\n   * @internal\n   */\n  protected _preEraseNode(curNode: TreeNode<K, V>) {\n    if (this._length === 1) {\n      this.clear();\n      return this._header;\n    }\n    let swapNode = curNode;\n    while (swapNode._left || swapNode._right) {\n      if (swapNode._right) {\n        swapNode = swapNode._right;\n        while (swapNode._left) swapNode = swapNode._left;\n      } else {\n        swapNode = swapNode._left!;\n      }\n      [curNode._key, swapNode._key] = [swapNode._key, curNode._key];\n      [curNode._value, swapNode._value] = [swapNode._value, curNode._value];\n      curNode = swapNode;\n    }\n    if (this._header._left === swapNode) {\n      this._header._left = swapNode._parent;\n    } else if (this._header._right === swapNode) {\n      this._header._right = swapNode._parent;\n    }\n    this._eraseNodeSelfBalance(swapNode);\n    const _parent = swapNode._parent!;\n    if (swapNode === _parent._left) {\n      _parent._left = undefined;\n    } else _parent._right = undefined;\n    this._length -= 1;\n    this._root!._color = TreeNodeColor.BLACK;\n    return _parent;\n  }\n  /**\n   * @internal\n   */\n  protected _inOrderTraversal(\n    curNode: TreeNode<K, V> | undefined,\n    callback: (curNode: TreeNode<K, V>) => boolean\n  ): boolean {\n    if (curNode === undefined) return false;\n    const ifReturn = this._inOrderTraversal(curNode._left, callback);\n    if (ifReturn) return true;\n    if (callback(curNode)) return true;\n    return this._inOrderTraversal(curNode._right, callback);\n  }\n  /**\n   * @internal\n   */\n  protected _insertNodeSelfBalance(curNode: TreeNode<K, V>) {\n    while (true) {\n      const parentNode = curNode._parent!;\n      if (parentNode._color === TreeNodeColor.BLACK) return;\n      const grandParent = parentNode._parent!;\n      if (parentNode === grandParent._left) {\n        const uncle = grandParent._right;\n        if (uncle && uncle._color === TreeNodeColor.RED) {\n          uncle._color = parentNode._color = TreeNodeColor.BLACK;\n          if (grandParent === this._root) return;\n          grandParent._color = TreeNodeColor.RED;\n          curNode = grandParent;\n          continue;\n        } else if (curNode === parentNode._right) {\n          curNode._color = TreeNodeColor.BLACK;\n          if (curNode._left) curNode._left._parent = parentNode;\n          if (curNode._right) curNode._right._parent = grandParent;\n          parentNode._right = curNode._left;\n          grandParent._left = curNode._right;\n          curNode._left = parentNode;\n          curNode._right = grandParent;\n          if (grandParent === this._root) {\n            this._root = curNode;\n            this._header._parent = curNode;\n          } else {\n            const GP = grandParent._parent!;\n            if (GP._left === grandParent) {\n              GP._left = curNode;\n            } else GP._right = curNode;\n          }\n          curNode._parent = grandParent._parent;\n          parentNode._parent = curNode;\n          grandParent._parent = curNode;\n          grandParent._color = TreeNodeColor.RED;\n          return { parentNode, grandParent, curNode };\n        } else {\n          parentNode._color = TreeNodeColor.BLACK;\n          if (grandParent === this._root) {\n            this._root = grandParent._rotateRight();\n          } else grandParent._rotateRight();\n          grandParent._color = TreeNodeColor.RED;\n        }\n      } else {\n        const uncle = grandParent._left;\n        if (uncle && uncle._color === TreeNodeColor.RED) {\n          uncle._color = parentNode._color = TreeNodeColor.BLACK;\n          if (grandParent === this._root) return;\n          grandParent._color = TreeNodeColor.RED;\n          curNode = grandParent;\n          continue;\n        } else if (curNode === parentNode._left) {\n          curNode._color = TreeNodeColor.BLACK;\n          if (curNode._left) curNode._left._parent = grandParent;\n          if (curNode._right) curNode._right._parent = parentNode;\n          grandParent._right = curNode._left;\n          parentNode._left = curNode._right;\n          curNode._left = grandParent;\n          curNode._right = parentNode;\n          if (grandParent === this._root) {\n            this._root = curNode;\n            this._header._parent = curNode;\n          } else {\n            const GP = grandParent._parent!;\n            if (GP._left === grandParent) {\n              GP._left = curNode;\n            } else GP._right = curNode;\n          }\n          curNode._parent = grandParent._parent;\n          parentNode._parent = curNode;\n          grandParent._parent = curNode;\n          grandParent._color = TreeNodeColor.RED;\n          return { parentNode, grandParent, curNode };\n        } else {\n          parentNode._color = TreeNodeColor.BLACK;\n          if (grandParent === this._root) {\n            this._root = grandParent._rotateLeft();\n          } else grandParent._rotateLeft();\n          grandParent._color = TreeNodeColor.RED;\n        }\n      }\n      return;\n    }\n  }\n  /**\n   * @internal\n   */\n  protected _preSet(key: K, value?: V, hint?: TreeIterator<K, V>) {\n    if (this._root === undefined) {\n      this._length += 1;\n      this._root = new this._TreeNodeClass(key, value);\n      this._root._color = TreeNodeColor.BLACK;\n      this._root._parent = this._header;\n      this._header._parent = this._root;\n      this._header._left = this._root;\n      this._header._right = this._root;\n      return;\n    }\n    let curNode;\n    const minNode = this._header._left!;\n    const compareToMin = this._cmp(minNode._key!, key);\n    if (compareToMin === 0) {\n      minNode._value = value;\n      return;\n    } else if (compareToMin > 0) {\n      minNode._left = new this._TreeNodeClass(key, value);\n      minNode._left._parent = minNode;\n      curNode = minNode._left;\n      this._header._left = curNode;\n    } else {\n      const maxNode = this._header._right!;\n      const compareToMax = this._cmp(maxNode._key!, key);\n      if (compareToMax === 0) {\n        maxNode._value = value;\n        return;\n      } else if (compareToMax < 0) {\n        maxNode._right = new this._TreeNodeClass(key, value);\n        maxNode._right._parent = maxNode;\n        curNode = maxNode._right;\n        this._header._right = curNode;\n      } else {\n        if (hint !== undefined) {\n          const iterNode = hint._node;\n          if (iterNode !== this._header) {\n            const iterCmpRes = this._cmp(iterNode._key!, key);\n            if (iterCmpRes === 0) {\n              iterNode._value = value;\n              return;\n            } else /* istanbul ignore else */ if (iterCmpRes > 0) {\n              const preNode = iterNode._pre();\n              const preCmpRes = this._cmp(preNode._key!, key);\n              if (preCmpRes === 0) {\n                preNode._value = value;\n                return;\n              } else if (preCmpRes < 0) {\n                curNode = new this._TreeNodeClass(key, value);\n                if (preNode._right === undefined) {\n                  preNode._right = curNode;\n                  curNode._parent = preNode;\n                } else {\n                  iterNode._left = curNode;\n                  curNode._parent = iterNode;\n                }\n              }\n            }\n          }\n        }\n        if (curNode === undefined) {\n          curNode = this._root;\n          while (true) {\n            const cmpResult = this._cmp(curNode._key!, key);\n            if (cmpResult > 0) {\n              if (curNode._left === undefined) {\n                curNode._left = new this._TreeNodeClass(key, value);\n                curNode._left._parent = curNode;\n                curNode = curNode._left;\n                break;\n              }\n              curNode = curNode._left;\n            } else if (cmpResult < 0) {\n              if (curNode._right === undefined) {\n                curNode._right = new this._TreeNodeClass(key, value);\n                curNode._right._parent = curNode;\n                curNode = curNode._right;\n                break;\n              }\n              curNode = curNode._right;\n            } else {\n              curNode._value = value;\n              return;\n            }\n          }\n        }\n      }\n    }\n    this._length += 1;\n    return curNode;\n  }\n  /**\n   * @internal\n   */\n  protected _findElementNode(curNode: TreeNode<K, V> | undefined, key: K) {\n    while (curNode) {\n      const cmpResult = this._cmp(curNode._key!, key);\n      if (cmpResult < 0) {\n        curNode = curNode._right;\n      } else if (cmpResult > 0) {\n        curNode = curNode._left;\n      } else return curNode;\n    }\n    return curNode || this._header;\n  }\n  clear() {\n    this._length = 0;\n    this._root = undefined;\n    this._header._parent = undefined;\n    this._header._left = this._header._right = undefined;\n  }\n  /**\n   * @description Update node's key by iterator.\n   * @param iter - The iterator you want to change.\n   * @param key - The key you want to update.\n   * @returns Whether the modification is successful.\n   * @example\n   * const st = new orderedSet([1, 2, 5]);\n   * const iter = st.find(2);\n   * st.updateKeyByIterator(iter, 3); // then st will become [1, 3, 5]\n   */\n  updateKeyByIterator(iter: TreeIterator<K, V>, key: K): boolean {\n    const node = iter._node;\n    if (node === this._header) {\n      throwIteratorAccessError();\n    }\n    if (this._length === 1) {\n      node._key = key;\n      return true;\n    }\n    if (node === this._header._left) {\n      if (this._cmp(node._next()._key!, key) > 0) {\n        node._key = key;\n        return true;\n      }\n      return false;\n    }\n    if (node === this._header._right) {\n      if (this._cmp(node._pre()._key!, key) < 0) {\n        node._key = key;\n        return true;\n      }\n      return false;\n    }\n    const preKey = node._pre()._key!;\n    if (this._cmp(preKey, key) >= 0) return false;\n    const nextKey = node._next()._key!;\n    if (this._cmp(nextKey, key) <= 0) return false;\n    node._key = key;\n    return true;\n  }\n  eraseElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let index = 0;\n    const self = this;\n    this._inOrderTraversal(\n      this._root,\n      function (curNode) {\n        if (pos === index) {\n          self._eraseNode(curNode);\n          return true;\n        }\n        index += 1;\n        return false;\n      });\n    return this._length;\n  }\n  /**\n   * @description Remove the element of the specified key.\n   * @param key - The key you want to remove.\n   * @returns Whether erase successfully.\n   */\n  eraseElementByKey(key: K) {\n    if (this._length === 0) return false;\n    const curNode = this._findElementNode(this._root, key);\n    if (curNode === this._header) return false;\n    this._eraseNode(curNode);\n    return true;\n  }\n  eraseElementByIterator(iter: TreeIterator<K, V>) {\n    const node = iter._node;\n    if (node === this._header) {\n      throwIteratorAccessError();\n    }\n    const hasNoRight = node._right === undefined;\n    const isNormal = iter.iteratorType === IteratorType.NORMAL;\n    // For the normal iterator, the `next` node will be swapped to `this` node when has right.\n    if (isNormal) {\n      // So we should move it to next when it's right is null.\n      if (hasNoRight) iter.next();\n    } else {\n      // For the reverse iterator, only when it doesn't have right and has left the `next` node will be swapped.\n      // So when it has right, or it is a leaf node we should move it to `next`.\n      if (!hasNoRight || node._left === undefined) iter.next();\n    }\n    this._eraseNode(node);\n    return iter;\n  }\n  forEach(callback: (element: K | [K, V], index: number, tree: TreeContainer<K, V>) => void) {\n    let index = 0;\n    for (const element of this) callback(element, index++, this);\n  }\n  getElementByPos(pos: number) {\n    $checkWithinAccessParams!(pos, 0, this._length - 1);\n    let res;\n    let index = 0;\n    for (const element of this) {\n      if (index === pos) {\n        res = element;\n        break;\n      }\n      index += 1;\n    }\n    return <K | [K, V]>res;\n  }\n  /**\n   * @description Get the height of the tree.\n   * @returns Number about the height of the RB-tree.\n   */\n  getHeight() {\n    if (this._length === 0) return 0;\n    const traversal =\n      function (curNode: TreeNode<K, V> | undefined): number {\n        if (!curNode) return 0;\n        return Math.max(traversal(curNode._left), traversal(curNode._right)) + 1;\n      };\n    return traversal(this._root);\n  }\n  /**\n   * @param key - The given key you want to compare.\n   * @returns An iterator to the first element less than the given key.\n   */\n  abstract reverseUpperBound(key: K): TreeIterator<K, V>;\n  /**\n   * @description Union the other tree to self.\n   * @param other - The other tree container you want to merge.\n   * @returns The size of the tree after union.\n   */\n  abstract union(other: TreeContainer<K, V>): number;\n  /**\n   * @param key - The given key you want to compare.\n   * @returns An iterator to the first element not greater than the given key.\n   */\n  abstract reverseLowerBound(key: K): TreeIterator<K, V>;\n  /**\n   * @param key - The given key you want to compare.\n   * @returns An iterator to the first element not less than the given key.\n   */\n  abstract lowerBound(key: K): TreeIterator<K, V>;\n  /**\n   * @param key - The given key you want to compare.\n   * @returns An iterator to the first element greater than the given key.\n   */\n  abstract upperBound(key: K): TreeIterator<K, V>;\n}\n\nexport default TreeContainer;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedMap.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedMap.d.ts
new file mode 100644
index 0000000..18c921f
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedMap.d.ts
@@ -0,0 +1,62 @@
+import TreeContainer from './Base';
+import TreeIterator from './Base/TreeIterator';
+import { TreeNode } from './Base/TreeNode';
+import { initContainer, IteratorType } from "../ContainerBase";
+declare class OrderedMapIterator<K, V> extends TreeIterator<K, V> {
+    container: OrderedMap<K, V>;
+    constructor(node: TreeNode<K, V>, header: TreeNode<K, V>, container: OrderedMap<K, V>, iteratorType?: IteratorType);
+    get pointer(): [K, V];
+    copy(): OrderedMapIterator<K, V>;
+    equals(iter: OrderedMapIterator<K, V>): boolean;
+}
+export type { OrderedMapIterator };
+declare class OrderedMap<K, V> extends TreeContainer<K, V> {
+    /**
+     * @param container - The initialization container.
+     * @param cmp - The compare function.
+     * @param enableIndex - Whether to enable iterator indexing function.
+     * @example
+     * new OrderedMap();
+     * new OrderedMap([[0, 1], [2, 1]]);
+     * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y);
+     * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y, true);
+     */
+    constructor(container?: initContainer<[K, V]>, cmp?: (x: K, y: K) => number, enableIndex?: boolean);
+    begin(): OrderedMapIterator<K, V>;
+    end(): OrderedMapIterator<K, V>;
+    rBegin(): OrderedMapIterator<K, V>;
+    rEnd(): OrderedMapIterator<K, V>;
+    front(): [K, V] | undefined;
+    back(): [K, V] | undefined;
+    lowerBound(key: K): OrderedMapIterator<K, V>;
+    upperBound(key: K): OrderedMapIterator<K, V>;
+    reverseLowerBound(key: K): OrderedMapIterator<K, V>;
+    reverseUpperBound(key: K): OrderedMapIterator<K, V>;
+    /**
+     * @description Insert a key-value pair or set value by the given key.
+     * @param key - The key want to insert.
+     * @param value - The value want to set.
+     * @param hint - You can give an iterator hint to improve insertion efficiency.
+     * @return The size of container after setting.
+     * @example
+     * const mp = new OrderedMap([[2, 0], [4, 0], [5, 0]]);
+     * const iter = mp.begin();
+     * mp.setElement(1, 0);
+     * mp.setElement(3, 0, iter);  // give a hint will be faster.
+     */
+    setElement(key: K, value: V, hint?: OrderedMapIterator<K, V>): number;
+    find(key: K): OrderedMapIterator<K, V>;
+    /**
+     * @description Get the value of the element of the specified key.
+     * @param key - The specified key you want to get.
+     * @example
+     * const val = container.getElementByKey(1);
+     */
+    getElementByKey(key: K): V | undefined;
+    union(other: OrderedMap<K, V>): number;
+    [Symbol.iterator](): Generator<[K, V], void, unknown>;
+    eraseElementByIterator(iter: OrderedMapIterator<K, V>): OrderedMapIterator<K, V>;
+    forEach(callback: (element: [K, V], index: number, map: OrderedMap<K, V>) => void): void;
+    getElementByPos(pos: number): [K, V];
+}
+export default OrderedMap;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedMap.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedMap.js
new file mode 100644
index 0000000..90795d5
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedMap.js
@@ -0,0 +1,265 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(r, e) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(r, e) {
+            r.__proto__ = e;
+        } || function(r, e) {
+            for (var t in e) if (Object.prototype.hasOwnProperty.call(e, t)) r[t] = e[t];
+        };
+        return extendStatics(r, e);
+    };
+    return function(r, e) {
+        if (typeof e !== "function" && e !== null) throw new TypeError("Class extends value " + String(e) + " is not a constructor or null");
+        extendStatics(r, e);
+        function __() {
+            this.constructor = r;
+        }
+        r.prototype = e === null ? Object.create(e) : (__.prototype = e.prototype, new __);
+    };
+}();
+
+var __generator = this && this.i || function(r, e) {
+    var t = {
+        label: 0,
+        sent: function() {
+            if (o[0] & 1) throw o[1];
+            return o[1];
+        },
+        trys: [],
+        ops: []
+    }, n, i, o, a;
+    return a = {
+        next: verb(0),
+        throw: verb(1),
+        return: verb(2)
+    }, typeof Symbol === "function" && (a[Symbol.iterator] = function() {
+        return this;
+    }), a;
+    function verb(r) {
+        return function(e) {
+            return step([ r, e ]);
+        };
+    }
+    function step(a) {
+        if (n) throw new TypeError("Generator is already executing.");
+        while (t) try {
+            if (n = 1, i && (o = a[0] & 2 ? i["return"] : a[0] ? i["throw"] || ((o = i["return"]) && o.call(i), 
+            0) : i.next) && !(o = o.call(i, a[1])).done) return o;
+            if (i = 0, o) a = [ a[0] & 2, o.value ];
+            switch (a[0]) {
+              case 0:
+              case 1:
+                o = a;
+                break;
+
+              case 4:
+                t.label++;
+                return {
+                    value: a[1],
+                    done: false
+                };
+
+              case 5:
+                t.label++;
+                i = a[1];
+                a = [ 0 ];
+                continue;
+
+              case 7:
+                a = t.ops.pop();
+                t.trys.pop();
+                continue;
+
+              default:
+                if (!(o = t.trys, o = o.length > 0 && o[o.length - 1]) && (a[0] === 6 || a[0] === 2)) {
+                    t = 0;
+                    continue;
+                }
+                if (a[0] === 3 && (!o || a[1] > o[0] && a[1] < o[3])) {
+                    t.label = a[1];
+                    break;
+                }
+                if (a[0] === 6 && t.label < o[1]) {
+                    t.label = o[1];
+                    o = a;
+                    break;
+                }
+                if (o && t.label < o[2]) {
+                    t.label = o[2];
+                    t.ops.push(a);
+                    break;
+                }
+                if (o[2]) t.ops.pop();
+                t.trys.pop();
+                continue;
+            }
+            a = e.call(r, t);
+        } catch (r) {
+            a = [ 6, r ];
+            i = 0;
+        } finally {
+            n = o = 0;
+        }
+        if (a[0] & 5) throw a[1];
+        return {
+            value: a[0] ? a[1] : void 0,
+            done: true
+        };
+    }
+};
+
+var __values = this && this.V || function(r) {
+    var e = typeof Symbol === "function" && Symbol.iterator, t = e && r[e], n = 0;
+    if (t) return t.call(r);
+    if (r && typeof r.length === "number") return {
+        next: function() {
+            if (r && n >= r.length) r = void 0;
+            return {
+                value: r && r[n++],
+                done: !r
+            };
+        }
+    };
+    throw new TypeError(e ? "Object is not iterable." : "Symbol.iterator is not defined.");
+};
+
+import TreeContainer from "./Base";
+
+import TreeIterator from "./Base/TreeIterator";
+
+import { throwIteratorAccessError } from "../../utils/throwError";
+
+var OrderedMapIterator = function(r) {
+    __extends(OrderedMapIterator, r);
+    function OrderedMapIterator(e, t, n, i) {
+        var o = r.call(this, e, t, i) || this;
+        o.container = n;
+        return o;
+    }
+    Object.defineProperty(OrderedMapIterator.prototype, "pointer", {
+        get: function() {
+            if (this.o === this.h) {
+                throwIteratorAccessError();
+            }
+            var r = this;
+            return new Proxy([], {
+                get: function(e, t) {
+                    if (t === "0") return r.o.u; else if (t === "1") return r.o.p;
+                },
+                set: function(e, t, n) {
+                    if (t !== "1") {
+                        throw new TypeError("props must be 1");
+                    }
+                    r.o.p = n;
+                    return true;
+                }
+            });
+        },
+        enumerable: false,
+        configurable: true
+    });
+    OrderedMapIterator.prototype.copy = function() {
+        return new OrderedMapIterator(this.o, this.h, this.container, this.iteratorType);
+    };
+    return OrderedMapIterator;
+}(TreeIterator);
+
+var OrderedMap = function(r) {
+    __extends(OrderedMap, r);
+    function OrderedMap(e, t, n) {
+        if (e === void 0) {
+            e = [];
+        }
+        var i = r.call(this, t, n) || this;
+        var o = i;
+        e.forEach((function(r) {
+            o.setElement(r[0], r[1]);
+        }));
+        return i;
+    }
+    OrderedMap.prototype.P = function(r) {
+        return __generator(this, (function(e) {
+            switch (e.label) {
+              case 0:
+                if (r === undefined) return [ 2 ];
+                return [ 5, __values(this.P(r.K)) ];
+
+              case 1:
+                e.sent();
+                return [ 4, [ r.u, r.p ] ];
+
+              case 2:
+                e.sent();
+                return [ 5, __values(this.P(r.N)) ];
+
+              case 3:
+                e.sent();
+                return [ 2 ];
+            }
+        }));
+    };
+    OrderedMap.prototype.begin = function() {
+        return new OrderedMapIterator(this.h.K || this.h, this.h, this);
+    };
+    OrderedMap.prototype.end = function() {
+        return new OrderedMapIterator(this.h, this.h, this);
+    };
+    OrderedMap.prototype.rBegin = function() {
+        return new OrderedMapIterator(this.h.N || this.h, this.h, this, 1);
+    };
+    OrderedMap.prototype.rEnd = function() {
+        return new OrderedMapIterator(this.h, this.h, this, 1);
+    };
+    OrderedMap.prototype.front = function() {
+        if (this.M === 0) return;
+        var r = this.h.K;
+        return [ r.u, r.p ];
+    };
+    OrderedMap.prototype.back = function() {
+        if (this.M === 0) return;
+        var r = this.h.N;
+        return [ r.u, r.p ];
+    };
+    OrderedMap.prototype.lowerBound = function(r) {
+        var e = this.U(this.W, r);
+        return new OrderedMapIterator(e, this.h, this);
+    };
+    OrderedMap.prototype.upperBound = function(r) {
+        var e = this.X(this.W, r);
+        return new OrderedMapIterator(e, this.h, this);
+    };
+    OrderedMap.prototype.reverseLowerBound = function(r) {
+        var e = this.Y(this.W, r);
+        return new OrderedMapIterator(e, this.h, this);
+    };
+    OrderedMap.prototype.reverseUpperBound = function(r) {
+        var e = this.Z(this.W, r);
+        return new OrderedMapIterator(e, this.h, this);
+    };
+    OrderedMap.prototype.setElement = function(r, e, t) {
+        return this.v(r, e, t);
+    };
+    OrderedMap.prototype.find = function(r) {
+        var e = this.g(this.W, r);
+        return new OrderedMapIterator(e, this.h, this);
+    };
+    OrderedMap.prototype.getElementByKey = function(r) {
+        var e = this.g(this.W, r);
+        return e.p;
+    };
+    OrderedMap.prototype.union = function(r) {
+        var e = this;
+        r.forEach((function(r) {
+            e.setElement(r[0], r[1]);
+        }));
+        return this.M;
+    };
+    OrderedMap.prototype[Symbol.iterator] = function() {
+        return this.P(this.W);
+    };
+    return OrderedMap;
+}(TreeContainer);
+
+export default OrderedMap;
+//# sourceMappingURL=OrderedMap.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedMap.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedMap.js.map
new file mode 100644
index 0000000..76fbadc
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedMap.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/TreeContainer/OrderedMap.js","../../src/container/TreeContainer/OrderedMap.ts"],"names":["__extends","this","extendStatics","d","b","Object","setPrototypeOf","__proto__","Array","p","prototype","hasOwnProperty","call","TypeError","String","__","constructor","create","__generator","thisArg","body","_","label","sent","t","trys","ops","f","y","g","next","verb","throw","return","Symbol","iterator","n","v","step","op","done","value","pop","length","push","e","__values","o","s","m","i","TreeContainer","TreeIterator","throwIteratorAccessError","OrderedMapIterator","_super","node","header","container","iteratorType","_this","defineProperty","get","_node","_header","self","Proxy","props","_key","_value","set","newValue","enumerable","configurable","copy","OrderedMap","cmp","enableIndex","forEach","el","setElement","_iterationFunc","curNode","_a","undefined","_left","_right","begin","end","rBegin","rEnd","front","_length","minNode","back","maxNode","lowerBound","key","resNode","_lowerBound","_root","upperBound","_upperBound","reverseLowerBound","_reverseLowerBound","reverseUpperBound","_reverseUpperBound","hint","_set","find","_findElementNode","getElementByKey","union","other"],"mappings":"AAAA,IAAIA,YAAaC,QAAQA,KAAKD,KAAe;IACzC,IAAIE,gBAAgB,SAAUC,GAAGC;QAC7BF,gBAAgBG,OAAOC,kBAClB;YAAEC,WAAW;qBAAgBC,SAAS,SAAUL,GAAGC;YAAKD,EAAEI,YAAYH;AAAG,aAC1E,SAAUD,GAAGC;YAAK,KAAK,IAAIK,KAAKL,GAAG,IAAIC,OAAOK,UAAUC,eAAeC,KAAKR,GAAGK,IAAIN,EAAEM,KAAKL,EAAEK;AAAI;QACpG,OAAOP,cAAcC,GAAGC;AAC5B;IACA,OAAO,SAAUD,GAAGC;QAChB,WAAWA,MAAM,cAAcA,MAAM,MACjC,MAAM,IAAIS,UAAU,yBAAyBC,OAAOV,KAAK;QAC7DF,cAAcC,GAAGC;QACjB,SAASW;YAAOd,KAAKe,cAAcb;AAAG;QACtCA,EAAEO,YAAYN,MAAM,OAAOC,OAAOY,OAAOb,MAAMW,GAAGL,YAAYN,EAAEM,WAAW,IAAIK;AACnF;AACJ,CAd6C;;AAe7C,IAAIG,cAAejB,QAAQA,KAAKiB,KAAgB,SAAUC,GAASC;IAC/D,IAAIC,IAAI;QAAEC,OAAO;QAAGC,MAAM;YAAa,IAAIC,EAAE,KAAK,GAAG,MAAMA,EAAE;YAAI,OAAOA,EAAE;AAAI;QAAGC,MAAM;QAAIC,KAAK;OAAMC,GAAGC,GAAGJ,GAAGK;IAC/G,OAAOA,IAAI;QAAEC,MAAMC,KAAK;QAAIC,OAASD,KAAK;QAAIE,QAAUF,KAAK;cAAaG,WAAW,eAAeL,EAAEK,OAAOC,YAAY;QAAa,OAAOlC;AAAM,QAAI4B;IACvJ,SAASE,KAAKK;QAAK,OAAO,SAAUC;YAAK,OAAOC,KAAK,EAACF,GAAGC;AAAK;AAAG;IACjE,SAASC,KAAKC;QACV,IAAIZ,GAAG,MAAM,IAAId,UAAU;QAC3B,OAAOQ;YACH,IAAIM,IAAI,GAAGC,MAAMJ,IAAIe,EAAG,KAAK,IAAIX,EAAE,YAAYW,EAAG,KAAKX,EAAE,cAAcJ,IAAII,EAAE,cAAcJ,EAAEZ,KAAKgB;YAAI,KAAKA,EAAEE,WAAWN,IAAIA,EAAEZ,KAAKgB,GAAGW,EAAG,KAAKC,MAAM,OAAOhB;YAC3J,IAAII,IAAI,GAAGJ,GAAGe,IAAK,EAACA,EAAG,KAAK,GAAGf,EAAEiB;YACjC,QAAQF,EAAG;cACP,KAAK;cAAG,KAAK;gBAAGf,IAAIe;gBAAI;;cACxB,KAAK;gBAAGlB,EAAEC;gBAAS,OAAO;oBAAEmB,OAAOF,EAAG;oBAAIC,MAAM;;;cAChD,KAAK;gBAAGnB,EAAEC;gBAASM,IAAIW,EAAG;gBAAIA,IAAK,EAAC;gBAAI;;cACxC,KAAK;gBAAGA,IAAKlB,EAAEK,IAAIgB;gBAAOrB,EAAEI,KAAKiB;gBAAO;;cACxC;gBACI,MAAMlB,IAAIH,EAAEI,MAAMD,IAAIA,EAAEmB,SAAS,KAAKnB,EAAEA,EAAEmB,SAAS,QAAQJ,EAAG,OAAO,KAAKA,EAAG,OAAO,IAAI;oBAAElB,IAAI;oBAAG;AAAU;gBAC3G,IAAIkB,EAAG,OAAO,OAAOf,KAAMe,EAAG,KAAKf,EAAE,MAAMe,EAAG,KAAKf,EAAE,KAAM;oBAAEH,EAAEC,QAAQiB,EAAG;oBAAI;AAAO;gBACrF,IAAIA,EAAG,OAAO,KAAKlB,EAAEC,QAAQE,EAAE,IAAI;oBAAEH,EAAEC,QAAQE,EAAE;oBAAIA,IAAIe;oBAAI;AAAO;gBACpE,IAAIf,KAAKH,EAAEC,QAAQE,EAAE,IAAI;oBAAEH,EAAEC,QAAQE,EAAE;oBAAIH,EAAEK,IAAIkB,KAAKL;oBAAK;AAAO;gBAClE,IAAIf,EAAE,IAAIH,EAAEK,IAAIgB;gBAChBrB,EAAEI,KAAKiB;gBAAO;;YAEtBH,IAAKnB,EAAKR,KAAKO,GAASE;UAC1B,OAAOwB;YAAKN,IAAK,EAAC,GAAGM;YAAIjB,IAAI;AAAG,UAAC;YAAWD,IAAIH,IAAI;AAAG;QACzD,IAAIe,EAAG,KAAK,GAAG,MAAMA,EAAG;QAAI,OAAO;YAAEE,OAAOF,EAAG,KAAKA,EAAG,UAAU;YAAGC,MAAM;;AAC9E;AACJ;;AACA,IAAIM,WAAY7C,QAAQA,KAAK6C,KAAa,SAASC;IAC/C,IAAIC,WAAWd,WAAW,cAAcA,OAAOC,UAAUc,IAAID,KAAKD,EAAEC,IAAIE,IAAI;IAC5E,IAAID,GAAG,OAAOA,EAAErC,KAAKmC;IACrB,IAAIA,YAAYA,EAAEJ,WAAW,UAAU,OAAO;QAC1Cb,MAAM;YACF,IAAIiB,KAAKG,KAAKH,EAAEJ,QAAQI,SAAS;YACjC,OAAO;gBAAEN,OAAOM,KAAKA,EAAEG;gBAAMV,OAAOO;;AACxC;;IAEJ,MAAM,IAAIlC,UAAUmC,IAAI,4BAA4B;AACxD;;OCpDOG,mBAAmB;;OACnBC,kBAAkB;;SAGhBC,gCAA0B;;AAEnC,IAAAC,qBAAA,SAAAC;IAAuCvD,UAAAsD,oBAAAC;IAErC,SAAAD,mBACEE,GACAC,GACAC,GACAC;QAJF,IAAAC,IAMEL,EAAA3C,KAAAX,MAAMuD,GAAMC,GAAQE,MAAa1D;QACjC2D,EAAKF,YAAYA;QD8Cb,OAAOE;AACX;IC7CFvD,OAAAwD,eAAIP,mBAAA5C,WAAA,WAAO;QD+CLoD,KC/CN;YACE,IAAI7D,KAAK8D,MAAU9D,KAAK+D,GAAS;gBAC/BX;ADgDM;YC9CR,IAAMY,IAAOhE;YACb,OAAO,IAAIiE,MAAuB,IAAI;gBACpCJ,KAAA,SAAIzC,GAAG8C;oBACL,IAAIA,MAAU,KAAK,OAAOF,EAAKF,EAAMK,QAChC,IAAID,MAAU,KAAK,OAAOF,EAAKF,EAAMM;ADkDlC;gBChDVC,KAAA,SAAIjD,GAAG8C,GAAYI;oBACjB,IAAIJ,MAAU,KAAK;wBACjB,MAAM,IAAItD,UAAU;ADkDV;oBChDZoD,EAAKF,EAAMM,IAASE;oBACpB,OAAO;ADkDC;;AAER;QACAC,YAAY;QACZC,cAAc;;IClDpBnB,mBAAA5C,UAAAgE,OAAA;QACE,OAAO,IAAIpB,mBACTrD,KAAK8D,GACL9D,KAAK+D,GACL/D,KAAKyD,WACLzD,KAAK0D;ADiDP;IC5CJ,OAAAL;AAAA,CAxCA,CAAuCF;;AA4CvC,IAAAuB,aAAA,SAAApB;IAA+BvD,UAAA2E,YAAApB;IAW7B,SAAAoB,WACEjB,GACAkB,GACAC;QAFA,IAAAnB,WAAA,GAAA;YAAAA,IAAA;AAAqC;QADvC,IAAAE,IAKEL,EAAA3C,KAAAX,MAAM2E,GAAKC,MAAY5E;QACvB,IAAMgE,IAAOL;QACbF,EAAUoB,SAAQ,SAAUC;YAC1Bd,EAAKe,WAAWD,EAAG,IAAIA,EAAG;AD0CxB;QACA,OAAOnB;AACX;ICtCQe,WAAAjE,UAAAuE,IAAV,SACEC;QD0CI,OAAOhE,YAAYjB,OAAM,SAAUkF;YAC/B,QAAQA,EAAG7D;cACP,KAAK;gBC1CjB,IAAI4D,MAAYE,WAAW,OAAA,EAAA;gBA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Object.create(b) : (__.prototype = b.prototype, new __());\n    };\n})();\nvar __generator = (this && this.__generator) || function (thisArg, body) {\n    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\n    return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\n    function verb(n) { return function (v) { return step([n, v]); }; }\n    function step(op) {\n        if (f) throw new TypeError(\"Generator is already executing.\");\n        while (_) try {\n            if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\n            if (y = 0, t) op = [op[0] & 2, t.value];\n            switch (op[0]) {\n                case 0: case 1: t = op; break;\n                case 4: _.label++; return { value: op[1], done: false };\n                case 5: _.label++; y = op[1]; op = [0]; continue;\n                case 7: op = _.ops.pop(); _.trys.pop(); continue;\n                default:\n                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n                    if (t[2]) _.ops.pop();\n                    _.trys.pop(); continue;\n            }\n            op = body.call(thisArg, _);\n        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n    }\n};\nvar __values = (this && this.__values) || function(o) {\n    var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\n    if (m) return m.call(o);\n    if (o && typeof o.length === \"number\") return {\n        next: function () {\n            if (o && i >= o.length) o = void 0;\n            return { value: o && o[i++], done: !o };\n        }\n    };\n    throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\n};\nimport TreeContainer from './Base';\nimport TreeIterator from './Base/TreeIterator';\nimport { throwIteratorAccessError } from \"../../utils/throwError\";\nvar OrderedMapIterator = /** @class */ (function (_super) {\n    __extends(OrderedMapIterator, _super);\n    function OrderedMapIterator(node, header, container, iteratorType) {\n        var _this = _super.call(this, node, header, iteratorType) || this;\n        _this.container = container;\n        return _this;\n    }\n    Object.defineProperty(OrderedMapIterator.prototype, \"pointer\", {\n        get: function () {\n            if (this._node === this._header) {\n                throwIteratorAccessError();\n            }\n            var self = this;\n            return new Proxy([], {\n                get: function (_, props) {\n                    if (props === '0')\n                        return self._node._key;\n                    else if (props === '1')\n                        return self._node._value;\n                },\n                set: function (_, props, newValue) {\n                    if (props !== '1') {\n                        throw new TypeError('props must be 1');\n                    }\n                    self._node._value = newValue;\n                    return true;\n                }\n            });\n        },\n        enumerable: false,\n        configurable: true\n    });\n    OrderedMapIterator.prototype.copy = function () {\n        return new OrderedMapIterator(this._node, this._header, this.container, this.iteratorType);\n    };\n    return OrderedMapIterator;\n}(TreeIterator));\nvar OrderedMap = /** @class */ (function (_super) {\n    __extends(OrderedMap, _super);\n    /**\n     * @param container - The initialization container.\n     * @param cmp - The compare function.\n     * @param enableIndex - Whether to enable iterator indexing function.\n     * @example\n     * new OrderedMap();\n     * new OrderedMap([[0, 1], [2, 1]]);\n     * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y);\n     * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y, true);\n     */\n    function OrderedMap(container, cmp, enableIndex) {\n        if (container === void 0) { container = []; }\n        var _this = _super.call(this, cmp, enableIndex) || this;\n        var self = _this;\n        container.forEach(function (el) {\n            self.setElement(el[0], el[1]);\n        });\n        return _this;\n    }\n    /**\n     * @internal\n     */\n    OrderedMap.prototype._iterationFunc = function (curNode) {\n        return __generator(this, function (_a) {\n            switch (_a.label) {\n                case 0:\n                    if (curNode === undefined)\n                        return [2 /*return*/];\n                    return [5 /*yield**/, __values(this._iterationFunc(curNode._left))];\n                case 1:\n                    _a.sent();\n                    return [4 /*yield*/, [curNode._key, curNode._value]];\n                case 2:\n                    _a.sent();\n                    return [5 /*yield**/, __values(this._iterationFunc(curNode._right))];\n                case 3:\n                    _a.sent();\n                    return [2 /*return*/];\n            }\n        });\n    };\n    OrderedMap.prototype.begin = function () {\n        return new OrderedMapIterator(this._header._left || this._header, this._header, this);\n    };\n    OrderedMap.prototype.end = function () {\n        return new OrderedMapIterator(this._header, this._header, this);\n    };\n    OrderedMap.prototype.rBegin = function () {\n        return new OrderedMapIterator(this._header._right || this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    };\n    OrderedMap.prototype.rEnd = function () {\n        return new OrderedMapIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    };\n    OrderedMap.prototype.front = function () {\n        if (this._length === 0)\n            return;\n        var minNode = this._header._left;\n        return [minNode._key, minNode._value];\n    };\n    OrderedMap.prototype.back = function () {\n        if (this._length === 0)\n            return;\n        var maxNode = this._header._right;\n        return [maxNode._key, maxNode._value];\n    };\n    OrderedMap.prototype.lowerBound = function (key) {\n        var resNode = this._lowerBound(this._root, key);\n        return new OrderedMapIterator(resNode, this._header, this);\n    };\n    OrderedMap.prototype.upperBound = function (key) {\n        var resNode = this._upperBound(this._root, key);\n        return new OrderedMapIterator(resNode, this._header, this);\n    };\n    OrderedMap.prototype.reverseLowerBound = function (key) {\n        var resNode = this._reverseLowerBound(this._root, key);\n        return new OrderedMapIterator(resNode, this._header, this);\n    };\n    OrderedMap.prototype.reverseUpperBound = function (key) {\n        var resNode = this._reverseUpperBound(this._root, key);\n        return new OrderedMapIterator(resNode, this._header, this);\n    };\n    /**\n     * @description Insert a key-value pair or set value by the given key.\n     * @param key - The key want to insert.\n     * @param value - The value want to set.\n     * @param hint - You can give an iterator hint to improve insertion efficiency.\n     * @return The size of container after setting.\n     * @example\n     * const mp = new OrderedMap([[2, 0], [4, 0], [5, 0]]);\n     * const iter = mp.begin();\n     * mp.setElement(1, 0);\n     * mp.setElement(3, 0, iter);  // give a hint will be faster.\n     */\n    OrderedMap.prototype.setElement = function (key, value, hint) {\n        return this._set(key, value, hint);\n    };\n    OrderedMap.prototype.find = function (key) {\n        var curNode = this._findElementNode(this._root, key);\n        return new OrderedMapIterator(curNode, this._header, this);\n    };\n    /**\n     * @description Get the value of the element of the specified key.\n     * @param key - The specified key you want to get.\n     * @example\n     * const val = container.getElementByKey(1);\n     */\n    OrderedMap.prototype.getElementByKey = function (key) {\n        var curNode = this._findElementNode(this._root, key);\n        return curNode._value;\n    };\n    OrderedMap.prototype.union = function (other) {\n        var self = this;\n        other.forEach(function (el) {\n            self.setElement(el[0], el[1]);\n        });\n        return this._length;\n    };\n    OrderedMap.prototype[Symbol.iterator] = function () {\n        return this._iterationFunc(this._root);\n    };\n    return OrderedMap;\n}(TreeContainer));\nexport default OrderedMap;\n","import TreeContainer from './Base';\nimport TreeIterator from './Base/TreeIterator';\nimport { TreeNode } from './Base/TreeNode';\nimport { initContainer, IteratorType } from '@/container/ContainerBase';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nclass OrderedMapIterator<K, V> extends TreeIterator<K, V> {\n  container: OrderedMap<K, V>;\n  constructor(\n    node: TreeNode<K, V>,\n    header: TreeNode<K, V>,\n    container: OrderedMap<K, V>,\n    iteratorType?: IteratorType\n  ) {\n    super(node, header, iteratorType);\n    this.container = container;\n  }\n  get pointer() {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    const self = this;\n    return new Proxy(<[K, V]><unknown>[], {\n      get(_, props: '0' | '1') {\n        if (props === '0') return self._node._key;\n        else if (props === '1') return self._node._value;\n      },\n      set(_, props: '1', newValue: V) {\n        if (props !== '1') {\n          throw new TypeError('props must be 1');\n        }\n        self._node._value = newValue;\n        return true;\n      }\n    });\n  }\n  copy() {\n    return new OrderedMapIterator<K, V>(\n      this._node,\n      this._header,\n      this.container,\n      this.iteratorType\n    );\n  }\n  // @ts-ignore\n  equals(iter: OrderedMapIterator<K, V>): boolean;\n}\n\nexport type { OrderedMapIterator };\n\nclass OrderedMap<K, V> extends TreeContainer<K, V> {\n  /**\n   * @param container - The initialization container.\n   * @param cmp - The compare function.\n   * @param enableIndex - Whether to enable iterator indexing function.\n   * @example\n   * new OrderedMap();\n   * new OrderedMap([[0, 1], [2, 1]]);\n   * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y);\n   * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y, true);\n   */\n  constructor(\n    container: initContainer<[K, V]> = [],\n    cmp?: (x: K, y: K) => number,\n    enableIndex?: boolean\n  ) {\n    super(cmp, enableIndex);\n    const self = this;\n    container.forEach(function (el) {\n      self.setElement(el[0], el[1]);\n    });\n  }\n  /**\n   * @internal\n   */\n  private * _iterationFunc(\n    curNode: TreeNode<K, V> | undefined\n  ): Generator<[K, V], void> {\n    if (curNode === undefined) return;\n    yield * this._iterationFunc(curNode._left);\n    yield <[K, V]>[curNode._key, curNode._value];\n    yield * this._iterationFunc(curNode._right);\n  }\n  begin() {\n    return new OrderedMapIterator<K, V>(this._header._left || this._header, this._header, this);\n  }\n  end() {\n    return new OrderedMapIterator<K, V>(this._header, this._header, this);\n  }\n  rBegin() {\n    return new OrderedMapIterator<K, V>(\n      this._header._right || this._header,\n      this._header,\n      this,\n      IteratorType.REVERSE\n    );\n  }\n  rEnd() {\n    return new OrderedMapIterator<K, V>(this._header, this._header, this, IteratorType.REVERSE);\n  }\n  front() {\n    if (this._length === 0) return;\n    const minNode = this._header._left!;\n    return <[K, V]>[minNode._key, minNode._value];\n  }\n  back() {\n    if (this._length === 0) return;\n    const maxNode = this._header._right!;\n    return <[K, V]>[maxNode._key, maxNode._value];\n  }\n  lowerBound(key: K) {\n    const resNode = this._lowerBound(this._root, key);\n    return new OrderedMapIterator<K, V>(resNode, this._header, this);\n  }\n  upperBound(key: K) {\n    const resNode = this._upperBound(this._root, key);\n    return new OrderedMapIterator<K, V>(resNode, this._header, this);\n  }\n  reverseLowerBound(key: K) {\n    const resNode = this._reverseLowerBound(this._root, key);\n    return new OrderedMapIterator<K, V>(resNode, this._header, this);\n  }\n  reverseUpperBound(key: K) {\n    const resNode = this._reverseUpperBound(this._root, key);\n    return new OrderedMapIterator<K, V>(resNode, this._header, this);\n  }\n  /**\n   * @description Insert a key-value pair or set value by the given key.\n   * @param key - The key want to insert.\n   * @param value - The value want to set.\n   * @param hint - You can give an iterator hint to improve insertion efficiency.\n   * @return The size of container after setting.\n   * @example\n   * const mp = new OrderedMap([[2, 0], [4, 0], [5, 0]]);\n   * const iter = mp.begin();\n   * mp.setElement(1, 0);\n   * mp.setElement(3, 0, iter);  // give a hint will be faster.\n   */\n  setElement(key: K, value: V, hint?: OrderedMapIterator<K, V>) {\n    return this._set(key, value, hint);\n  }\n  find(key: K) {\n    const curNode = this._findElementNode(this._root, key);\n    return new OrderedMapIterator<K, V>(curNode, this._header, this);\n  }\n  /**\n   * @description Get the value of the element of the specified key.\n   * @param key - The specified key you want to get.\n   * @example\n   * const val = container.getElementByKey(1);\n   */\n  getElementByKey(key: K) {\n    const curNode = this._findElementNode(this._root, key);\n    return curNode._value;\n  }\n  union(other: OrderedMap<K, V>) {\n    const self = this;\n    other.forEach(function (el) {\n      self.setElement(el[0], el[1]);\n    });\n    return this._length;\n  }\n  [Symbol.iterator]() {\n    return this._iterationFunc(this._root);\n  }\n  // @ts-ignore\n  eraseElementByIterator(iter: OrderedMapIterator<K, V>): OrderedMapIterator<K, V>;\n  // @ts-ignore\n  forEach(callback: (element: [K, V], index: number, map: OrderedMap<K, V>) => void): void;\n  // @ts-ignore\n  getElementByPos(pos: number): [K, V];\n}\n\nexport default OrderedMap;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedSet.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedSet.d.ts
new file mode 100644
index 0000000..e946983
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedSet.d.ts
@@ -0,0 +1,54 @@
+import TreeContainer from './Base';
+import TreeIterator from './Base/TreeIterator';
+import { TreeNode } from './Base/TreeNode';
+import { initContainer, IteratorType } from "../ContainerBase";
+declare class OrderedSetIterator<K> extends TreeIterator<K, undefined> {
+    container: OrderedSet<K>;
+    constructor(node: TreeNode<K, undefined>, header: TreeNode<K, undefined>, container: OrderedSet<K>, iteratorType?: IteratorType);
+    get pointer(): NonNullable<K>;
+    copy(): OrderedSetIterator<K>;
+    equals(iter: OrderedSetIterator<K>): boolean;
+}
+export type { OrderedSetIterator };
+declare class OrderedSet<K> extends TreeContainer<K, undefined> {
+    /**
+     * @param container - The initialization container.
+     * @param cmp - The compare function.
+     * @param enableIndex - Whether to enable iterator indexing function.
+     * @example
+     * new OrderedSet();
+     * new OrderedSet([0, 1, 2]);
+     * new OrderedSet([0, 1, 2], (x, y) => x - y);
+     * new OrderedSet([0, 1, 2], (x, y) => x - y, true);
+     */
+    constructor(container?: initContainer<K>, cmp?: (x: K, y: K) => number, enableIndex?: boolean);
+    begin(): OrderedSetIterator<K>;
+    end(): OrderedSetIterator<K>;
+    rBegin(): OrderedSetIterator<K>;
+    rEnd(): OrderedSetIterator<K>;
+    front(): K | undefined;
+    back(): K | undefined;
+    /**
+     * @description Insert element to set.
+     * @param key - The key want to insert.
+     * @param hint - You can give an iterator hint to improve insertion efficiency.
+     * @return The size of container after setting.
+     * @example
+     * const st = new OrderedSet([2, 4, 5]);
+     * const iter = st.begin();
+     * st.insert(1);
+     * st.insert(3, iter);  // give a hint will be faster.
+     */
+    insert(key: K, hint?: OrderedSetIterator<K>): number;
+    find(element: K): OrderedSetIterator<K>;
+    lowerBound(key: K): OrderedSetIterator<K>;
+    upperBound(key: K): OrderedSetIterator<K>;
+    reverseLowerBound(key: K): OrderedSetIterator<K>;
+    reverseUpperBound(key: K): OrderedSetIterator<K>;
+    union(other: OrderedSet<K>): number;
+    [Symbol.iterator](): Generator<K, void, unknown>;
+    eraseElementByIterator(iter: OrderedSetIterator<K>): OrderedSetIterator<K>;
+    forEach(callback: (element: K, index: number, tree: OrderedSet<K>) => void): void;
+    getElementByPos(pos: number): K;
+}
+export default OrderedSet;
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedSet.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedSet.js
new file mode 100644
index 0000000..0bd1270
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedSet.js
@@ -0,0 +1,245 @@
+var __extends = this && this.t || function() {
+    var extendStatics = function(e, t) {
+        extendStatics = Object.setPrototypeOf || {
+            __proto__: []
+        } instanceof Array && function(e, t) {
+            e.__proto__ = t;
+        } || function(e, t) {
+            for (var r in t) if (Object.prototype.hasOwnProperty.call(t, r)) e[r] = t[r];
+        };
+        return extendStatics(e, t);
+    };
+    return function(e, t) {
+        if (typeof t !== "function" && t !== null) throw new TypeError("Class extends value " + String(t) + " is not a constructor or null");
+        extendStatics(e, t);
+        function __() {
+            this.constructor = e;
+        }
+        e.prototype = t === null ? Object.create(t) : (__.prototype = t.prototype, new __);
+    };
+}();
+
+var __generator = this && this.i || function(e, t) {
+    var r = {
+        label: 0,
+        sent: function() {
+            if (o[0] & 1) throw o[1];
+            return o[1];
+        },
+        trys: [],
+        ops: []
+    }, n, i, o, u;
+    return u = {
+        next: verb(0),
+        throw: verb(1),
+        return: verb(2)
+    }, typeof Symbol === "function" && (u[Symbol.iterator] = function() {
+        return this;
+    }), u;
+    function verb(e) {
+        return function(t) {
+            return step([ e, t ]);
+        };
+    }
+    function step(u) {
+        if (n) throw new TypeError("Generator is already executing.");
+        while (r) try {
+            if (n = 1, i && (o = u[0] & 2 ? i["return"] : u[0] ? i["throw"] || ((o = i["return"]) && o.call(i), 
+            0) : i.next) && !(o = o.call(i, u[1])).done) return o;
+            if (i = 0, o) u = [ u[0] & 2, o.value ];
+            switch (u[0]) {
+              case 0:
+              case 1:
+                o = u;
+                break;
+
+              case 4:
+                r.label++;
+                return {
+                    value: u[1],
+                    done: false
+                };
+
+              case 5:
+                r.label++;
+                i = u[1];
+                u = [ 0 ];
+                continue;
+
+              case 7:
+                u = r.ops.pop();
+                r.trys.pop();
+                continue;
+
+              default:
+                if (!(o = r.trys, o = o.length > 0 && o[o.length - 1]) && (u[0] === 6 || u[0] === 2)) {
+                    r = 0;
+                    continue;
+                }
+                if (u[0] === 3 && (!o || u[1] > o[0] && u[1] < o[3])) {
+                    r.label = u[1];
+                    break;
+                }
+                if (u[0] === 6 && r.label < o[1]) {
+                    r.label = o[1];
+                    o = u;
+                    break;
+                }
+                if (o && r.label < o[2]) {
+                    r.label = o[2];
+                    r.ops.push(u);
+                    break;
+                }
+                if (o[2]) r.ops.pop();
+                r.trys.pop();
+                continue;
+            }
+            u = t.call(e, r);
+        } catch (e) {
+            u = [ 6, e ];
+            i = 0;
+        } finally {
+            n = o = 0;
+        }
+        if (u[0] & 5) throw u[1];
+        return {
+            value: u[0] ? u[1] : void 0,
+            done: true
+        };
+    }
+};
+
+var __values = this && this.V || function(e) {
+    var t = typeof Symbol === "function" && Symbol.iterator, r = t && e[t], n = 0;
+    if (r) return r.call(e);
+    if (e && typeof e.length === "number") return {
+        next: function() {
+            if (e && n >= e.length) e = void 0;
+            return {
+                value: e && e[n++],
+                done: !e
+            };
+        }
+    };
+    throw new TypeError(t ? "Object is not iterable." : "Symbol.iterator is not defined.");
+};
+
+import TreeContainer from "./Base";
+
+import TreeIterator from "./Base/TreeIterator";
+
+import { throwIteratorAccessError } from "../../utils/throwError";
+
+var OrderedSetIterator = function(e) {
+    __extends(OrderedSetIterator, e);
+    function OrderedSetIterator(t, r, n, i) {
+        var o = e.call(this, t, r, i) || this;
+        o.container = n;
+        return o;
+    }
+    Object.defineProperty(OrderedSetIterator.prototype, "pointer", {
+        get: function() {
+            if (this.o === this.h) {
+                throwIteratorAccessError();
+            }
+            return this.o.u;
+        },
+        enumerable: false,
+        configurable: true
+    });
+    OrderedSetIterator.prototype.copy = function() {
+        return new OrderedSetIterator(this.o, this.h, this.container, this.iteratorType);
+    };
+    return OrderedSetIterator;
+}(TreeIterator);
+
+var OrderedSet = function(e) {
+    __extends(OrderedSet, e);
+    function OrderedSet(t, r, n) {
+        if (t === void 0) {
+            t = [];
+        }
+        var i = e.call(this, r, n) || this;
+        var o = i;
+        t.forEach((function(e) {
+            o.insert(e);
+        }));
+        return i;
+    }
+    OrderedSet.prototype.P = function(e) {
+        return __generator(this, (function(t) {
+            switch (t.label) {
+              case 0:
+                if (e === undefined) return [ 2 ];
+                return [ 5, __values(this.P(e.K)) ];
+
+              case 1:
+                t.sent();
+                return [ 4, e.u ];
+
+              case 2:
+                t.sent();
+                return [ 5, __values(this.P(e.N)) ];
+
+              case 3:
+                t.sent();
+                return [ 2 ];
+            }
+        }));
+    };
+    OrderedSet.prototype.begin = function() {
+        return new OrderedSetIterator(this.h.K || this.h, this.h, this);
+    };
+    OrderedSet.prototype.end = function() {
+        return new OrderedSetIterator(this.h, this.h, this);
+    };
+    OrderedSet.prototype.rBegin = function() {
+        return new OrderedSetIterator(this.h.N || this.h, this.h, this, 1);
+    };
+    OrderedSet.prototype.rEnd = function() {
+        return new OrderedSetIterator(this.h, this.h, this, 1);
+    };
+    OrderedSet.prototype.front = function() {
+        return this.h.K ? this.h.K.u : undefined;
+    };
+    OrderedSet.prototype.back = function() {
+        return this.h.N ? this.h.N.u : undefined;
+    };
+    OrderedSet.prototype.insert = function(e, t) {
+        return this.v(e, undefined, t);
+    };
+    OrderedSet.prototype.find = function(e) {
+        var t = this.g(this.W, e);
+        return new OrderedSetIterator(t, this.h, this);
+    };
+    OrderedSet.prototype.lowerBound = function(e) {
+        var t = this.U(this.W, e);
+        return new OrderedSetIterator(t, this.h, this);
+    };
+    OrderedSet.prototype.upperBound = function(e) {
+        var t = this.X(this.W, e);
+        return new OrderedSetIterator(t, this.h, this);
+    };
+    OrderedSet.prototype.reverseLowerBound = function(e) {
+        var t = this.Y(this.W, e);
+        return new OrderedSetIterator(t, this.h, this);
+    };
+    OrderedSet.prototype.reverseUpperBound = function(e) {
+        var t = this.Z(this.W, e);
+        return new OrderedSetIterator(t, this.h, this);
+    };
+    OrderedSet.prototype.union = function(e) {
+        var t = this;
+        e.forEach((function(e) {
+            t.insert(e);
+        }));
+        return this.M;
+    };
+    OrderedSet.prototype[Symbol.iterator] = function() {
+        return this.P(this.W);
+    };
+    return OrderedSet;
+}(TreeContainer);
+
+export default OrderedSet;
+//# sourceMappingURL=OrderedSet.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedSet.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedSet.js.map
new file mode 100644
index 0000000..c716c51
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/container/TreeContainer/OrderedSet.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["container/TreeContainer/OrderedSet.js","../../src/container/TreeContainer/OrderedSet.ts"],"names":["__extends","this","extendStatics","d","b","Object","setPrototypeOf","__proto__","Array","p","prototype","hasOwnProperty","call","TypeError","String","__","constructor","create","__generator","thisArg","body","_","label","sent","t","trys","ops","f","y","g","next","verb","throw","return","Symbol","iterator","n","v","step","op","done","value","pop","length","push","e","__values","o","s","m","i","TreeContainer","TreeIterator","throwIteratorAccessError","OrderedSetIterator","_super","node","header","container","iteratorType","_this","defineProperty","get","_node","_header","_key","enumerable","configurable","copy","OrderedSet","cmp","enableIndex","self","forEach","el","insert","_iterationFunc","curNode","_a","undefined","_left","_right","begin","end","rBegin","rEnd","front","back","key","hint","_set","find","element","resNode","_findElementNode","_root","lowerBound","_lowerBound","upperBound","_upperBound","reverseLowerBound","_reverseLowerBound","reverseUpperBound","_reverseUpperBound","union","other","_length"],"mappings":"AAAA,IAAIA,YAAaC,QAAQA,KAAKD,KAAe;IACzC,IAAIE,gBAAgB,SAAUC,GAAGC;QAC7BF,gBAAgBG,OAAOC,kBAClB;YAAEC,WAAW;qBAAgBC,SAAS,SAAUL,GAAGC;YAAKD,EAAEI,YAAYH;AAAG,aAC1E,SAAUD,GAAGC;YAAK,KAAK,IAAIK,KAAKL,GAAG,IAAIC,OAAOK,UAAUC,eAAeC,KAAKR,GAAGK,IAAIN,EAAEM,KAAKL,EAAEK;AAAI;QACpG,OAAOP,cAAcC,GAAGC;AAC5B;IACA,OAAO,SAAUD,GAAGC;QAChB,WAAWA,MAAM,cAAcA,MAAM,MACjC,MAAM,IAAIS,UAAU,yBAAyBC,OAAOV,KAAK;QAC7DF,cAAcC,GAAGC;QACjB,SAASW;YAAOd,KAAKe,cAAcb;AAAG;QACtCA,EAAEO,YAAYN,MAAM,OAAOC,OAAOY,OAAOb,MAAMW,GAAGL,YAAYN,EAAEM,WAAW,IAAIK;AACnF;AACJ,CAd6C;;AAe7C,IAAIG,cAAejB,QAAQA,KAAKiB,KAAgB,SAAUC,GAASC;IAC/D,IAAIC,IAAI;QAAEC,OAAO;QAAGC,MAAM;YAAa,IAAIC,EAAE,KAAK,GAAG,MAAMA,EAAE;YAAI,OAAOA,EAAE;AAAI;QAAGC,MAAM;QAAIC,KAAK;OAAMC,GAAGC,GAAGJ,GAAGK;IAC/G,OAAOA,IAAI;QAAEC,MAAMC,KAAK;QAAIC,OAASD,KAAK;QAAIE,QAAUF,KAAK;cAAaG,WAAW,eAAeL,EAAEK,OAAOC,YAAY;QAAa,OAAOlC;AAAM,QAAI4B;IACvJ,SAASE,KAAKK;QAAK,OAAO,SAAUC;YAAK,OAAOC,KAAK,EAACF,GAAGC;AAAK;AAAG;IACjE,SAASC,KAAKC;QACV,IAAIZ,GAAG,MAAM,IAAId,UAAU;QAC3B,OAAOQ;YACH,IAAIM,IAAI,GAAGC,MAAMJ,IAAIe,EAAG,KAAK,IAAIX,EAAE,YAAYW,EAAG,KAAKX,EAAE,cAAcJ,IAAII,EAAE,cAAcJ,EAAEZ,KAAKgB;YAAI,KAAKA,EAAEE,WAAWN,IAAIA,EAAEZ,KAAKgB,GAAGW,EAAG,KAAKC,MAAM,OAAOhB;YAC3J,IAAII,IAAI,GAAGJ,GAAGe,IAAK,EAACA,EAAG,KAAK,GAAGf,EAAEiB;YACjC,QAAQF,EAAG;cACP,KAAK;cAAG,KAAK;gBAAGf,IAAIe;gBAAI;;cACxB,KAAK;gBAAGlB,EAAEC;gBAAS,OAAO;oBAAEmB,OAAOF,EAAG;oBAAIC,MAAM;;;cAChD,KAAK;gBAAGnB,EAAEC;gBAASM,IAAIW,EAAG;gBAAIA,IAAK,EAAC;gBAAI;;cACxC,KAAK;gBAAGA,IAAKlB,EAAEK,IAAIgB;gBAAOrB,EAAEI,KAAKiB;gBAAO;;cACxC;gBACI,MAAMlB,IAAIH,EAAEI,MAAMD,IAAIA,EAAEmB,SAAS,KAAKnB,EAAEA,EAAEmB,SAAS,QAAQJ,EAAG,OAAO,KAAKA,EAAG,OAAO,IAAI;oBAAElB,IAAI;oBAAG;AAAU;gBAC3G,IAAIkB,EAAG,OAAO,OAAOf,KAAMe,EAAG,KAAKf,EAAE,MAAMe,EAAG,KAAKf,EAAE,KAAM;oBAAEH,EAAEC,QAAQiB,EAAG;oBAAI;AAAO;gBACrF,IAAIA,EAAG,OAAO,KAAKlB,EAAEC,QAAQE,EAAE,IAAI;oBAAEH,EAAEC,QAAQE,EAAE;oBAAIA,IAAIe;oBAAI;AAAO;gBACpE,IAAIf,KAAKH,EAAEC,QAAQE,EAAE,IAAI;oBAAEH,EAAEC,QAAQE,EAAE;oBAAIH,EAAEK,IAAIkB,KAAKL;oBAAK;AAAO;gBAClE,IAAIf,EAAE,IAAIH,EAAEK,IAAIgB;gBAChBrB,EAAEI,KAAKiB;gBAAO;;YAEtBH,IAAKnB,EAAKR,KAAKO,GAASE;UAC1B,OAAOwB;YAAKN,IAAK,EAAC,GAAGM;YAAIjB,IAAI;AAAG,UAAC;YAAWD,IAAIH,IAAI;AAAG;QACzD,IAAIe,EAAG,KAAK,GAAG,MAAMA,EAAG;QAAI,OAAO;YAAEE,OAAOF,EAAG,KAAKA,EAAG,UAAU;YAAGC,MAAM;;AAC9E;AACJ;;AACA,IAAIM,WAAY7C,QAAQA,KAAK6C,KAAa,SAASC;IAC/C,IAAIC,WAAWd,WAAW,cAAcA,OAAOC,UAAUc,IAAID,KAAKD,EAAEC,IAAIE,IAAI;IAC5E,IAAID,GAAG,OAAOA,EAAErC,KAAKmC;IACrB,IAAIA,YAAYA,EAAEJ,WAAW,UAAU,OAAO;QAC1Cb,MAAM;YACF,IAAIiB,KAAKG,KAAKH,EAAEJ,QAAQI,SAAS;YACjC,OAAO;gBAAEN,OAAOM,KAAKA,EAAEG;gBAAMV,OAAOO;;AACxC;;IAEJ,MAAM,IAAIlC,UAAUmC,IAAI,4BAA4B;AACxD;;OCpDOG,mBAAmB;;OACnBC,kBAAkB;;SAGhBC,gCAA0B;;AAEnC,IAAAC,qBAAA,SAAAC;IAAoCvD,UAAAsD,oBAAAC;IAElC,SAAAD,mBACEE,GACAC,GACAC,GACAC;QAJF,IAAAC,IAMEL,EAAA3C,KAAAX,MAAMuD,GAAMC,GAAQE,MAAa1D;QACjC2D,EAAKF,YAAYA;QD8Cb,OAAOE;AACX;IC7CFvD,OAAAwD,eAAIP,mBAAA5C,WAAA,WAAO;QD+CLoD,KC/CN;YACE,IAAI7D,KAAK8D,MAAU9D,KAAK+D,GAAS;gBAC/BX;ADgDM;YC9CR,OAAOpD,KAAK8D,EAAME;ADgDd;QACAC,YAAY;QACZC,cAAc;;IChDpBb,mBAAA5C,UAAA0D,OAAA;QACE,OAAO,IAAId,mBACTrD,KAAK8D,GACL9D,KAAK+D,GACL/D,KAAKyD,WACLzD,KAAK0D;AD+CP;IC1CJ,OAAAL;AAAA,CA3BA,CAAoCF;;AA+BpC,IAAAiB,aAAA,SAAAd;IAA4BvD,UAAAqE,YAAAd;IAW1B,SAAAc,WACEX,GACAY,GACAC;QAFA,IAAAb,WAAA,GAAA;YAAAA,IAAA;AAAgC;QADlC,IAAAE,IAKEL,EAAA3C,KAAAX,MAAMqE,GAAKC,MAAYtE;QACvB,IAAMuE,IAAOZ;QACbF,EAAUe,SAAQ,SAAUC;YAC1BF,EAAKG,OAAOD;ADwCV;QACA,OAAOd;AACX;ICpCQS,WAAA3D,UAAAkE,IAAV,SACEC;QDwCI,OAAO3D,YAAYjB,OAAM,SAAU6E;YAC/B,QAAQA,EAAGxD;cACP,KAAK;gBCxCjB,IAAIuD,MAAYE,WAAW,OAAA,EAAA;gBAC3B,OAAA,EAAA,GAAAjC,SAAQ7C,KAAK2E,EAAeC,EAAQG;;cD2CxB,KAAK;gBC3CjBF,EAAAvD;gBACA,OAAA,EAAA,GAAMsD,EAAQZ;;cD6CF,KAAK;gBC7CjBa,EAAAvD;gBACA,OAAA,EAAA,GAAAuB,SAAQ7C,KAAK2E,EAAeC,EAAQI;;cD+CxB,KAAK;gBC/CjBH,EAAAvD;gBDiDgB,OAAO,EAAC;;AAEpB;AACJ;IClDF8C,WAAA3D,UAAAwE,QAAA;QACE,OAAO,IAAI5B,mBACTrD,KAAK+D,EAAQgB,KAAS/E,KAAK+D,GAC3B/D,KAAK+D,GACL/D;ADiDF;IC9CFoE,WAAA3D,UAA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op[1] : void 0, done: true };\n    }\n};\nvar __values = (this && this.__values) || function(o) {\n    var s = typeof Symbol === \"function\" && Symbol.iterator, m = s && o[s], i = 0;\n    if (m) return m.call(o);\n    if (o && typeof o.length === \"number\") return {\n        next: function () {\n            if (o && i >= o.length) o = void 0;\n            return { value: o && o[i++], done: !o };\n        }\n    };\n    throw new TypeError(s ? \"Object is not iterable.\" : \"Symbol.iterator is not defined.\");\n};\nimport TreeContainer from './Base';\nimport TreeIterator from './Base/TreeIterator';\nimport { throwIteratorAccessError } from \"../../utils/throwError\";\nvar OrderedSetIterator = /** @class */ (function (_super) {\n    __extends(OrderedSetIterator, _super);\n    function OrderedSetIterator(node, header, container, iteratorType) {\n        var _this = _super.call(this, node, header, iteratorType) || this;\n        _this.container = container;\n        return _this;\n    }\n    Object.defineProperty(OrderedSetIterator.prototype, \"pointer\", {\n        get: function () {\n            if (this._node === this._header) {\n                throwIteratorAccessError();\n            }\n            return this._node._key;\n        },\n        enumerable: false,\n        configurable: true\n    });\n    OrderedSetIterator.prototype.copy = function () {\n        return new OrderedSetIterator(this._node, this._header, this.container, this.iteratorType);\n    };\n    return OrderedSetIterator;\n}(TreeIterator));\nvar OrderedSet = /** @class */ (function (_super) {\n    __extends(OrderedSet, _super);\n    /**\n     * @param container - The initialization container.\n     * @param cmp - The compare function.\n     * @param enableIndex - Whether to enable iterator indexing function.\n     * @example\n     * new OrderedSet();\n     * new OrderedSet([0, 1, 2]);\n     * new OrderedSet([0, 1, 2], (x, y) => x - y);\n     * new OrderedSet([0, 1, 2], (x, y) => x - y, true);\n     */\n    function OrderedSet(container, cmp, enableIndex) {\n        if (container === void 0) { container = []; }\n        var _this = _super.call(this, cmp, enableIndex) || this;\n        var self = _this;\n        container.forEach(function (el) {\n            self.insert(el);\n        });\n        return _this;\n    }\n    /**\n     * @internal\n     */\n    OrderedSet.prototype._iterationFunc = function (curNode) {\n        return __generator(this, function (_a) {\n            switch (_a.label) {\n                case 0:\n                    if (curNode === undefined)\n                        return [2 /*return*/];\n                    return [5 /*yield**/, __values(this._iterationFunc(curNode._left))];\n                case 1:\n                    _a.sent();\n                    return [4 /*yield*/, curNode._key];\n                case 2:\n                    _a.sent();\n                    return [5 /*yield**/, __values(this._iterationFunc(curNode._right))];\n                case 3:\n                    _a.sent();\n                    return [2 /*return*/];\n            }\n        });\n    };\n    OrderedSet.prototype.begin = function () {\n        return new OrderedSetIterator(this._header._left || this._header, this._header, this);\n    };\n    OrderedSet.prototype.end = function () {\n        return new OrderedSetIterator(this._header, this._header, this);\n    };\n    OrderedSet.prototype.rBegin = function () {\n        return new OrderedSetIterator(this._header._right || this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    };\n    OrderedSet.prototype.rEnd = function () {\n        return new OrderedSetIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);\n    };\n    OrderedSet.prototype.front = function () {\n        return this._header._left ? this._header._left._key : undefined;\n    };\n    OrderedSet.prototype.back = function () {\n        return this._header._right ? this._header._right._key : undefined;\n    };\n    /**\n     * @description Insert element to set.\n     * @param key - The key want to insert.\n     * @param hint - You can give an iterator hint to improve insertion efficiency.\n     * @return The size of container after setting.\n     * @example\n     * const st = new OrderedSet([2, 4, 5]);\n     * const iter = st.begin();\n     * st.insert(1);\n     * st.insert(3, iter);  // give a hint will be faster.\n     */\n    OrderedSet.prototype.insert = function (key, hint) {\n        return this._set(key, undefined, hint);\n    };\n    OrderedSet.prototype.find = function (element) {\n        var resNode = this._findElementNode(this._root, element);\n        return new OrderedSetIterator(resNode, this._header, this);\n    };\n    OrderedSet.prototype.lowerBound = function (key) {\n        var resNode = this._lowerBound(this._root, key);\n        return new OrderedSetIterator(resNode, this._header, this);\n    };\n    OrderedSet.prototype.upperBound = function (key) {\n        var resNode = this._upperBound(this._root, key);\n        return new OrderedSetIterator(resNode, this._header, this);\n    };\n    OrderedSet.prototype.reverseLowerBound = function (key) {\n        var resNode = this._reverseLowerBound(this._root, key);\n        return new OrderedSetIterator(resNode, this._header, this);\n    };\n    OrderedSet.prototype.reverseUpperBound = function (key) {\n        var resNode = this._reverseUpperBound(this._root, key);\n        return new OrderedSetIterator(resNode, this._header, this);\n    };\n    OrderedSet.prototype.union = function (other) {\n        var self = this;\n        other.forEach(function (el) {\n            self.insert(el);\n        });\n        return this._length;\n    };\n    OrderedSet.prototype[Symbol.iterator] = function () {\n        return this._iterationFunc(this._root);\n    };\n    return OrderedSet;\n}(TreeContainer));\nexport default OrderedSet;\n","import TreeContainer from './Base';\nimport TreeIterator from './Base/TreeIterator';\nimport { TreeNode } from './Base/TreeNode';\nimport { initContainer, IteratorType } from '@/container/ContainerBase';\nimport { throwIteratorAccessError } from '@/utils/throwError';\n\nclass OrderedSetIterator<K> extends TreeIterator<K, undefined> {\n  container: OrderedSet<K>;\n  constructor(\n    node: TreeNode<K, undefined>,\n    header: TreeNode<K, undefined>,\n    container: OrderedSet<K>,\n    iteratorType?: IteratorType\n  ) {\n    super(node, header, iteratorType);\n    this.container = container;\n  }\n  get pointer() {\n    if (this._node === this._header) {\n      throwIteratorAccessError();\n    }\n    return this._node._key!;\n  }\n  copy() {\n    return new OrderedSetIterator<K>(\n      this._node,\n      this._header,\n      this.container,\n      this.iteratorType\n    );\n  }\n  // @ts-ignore\n  equals(iter: OrderedSetIterator<K>): boolean;\n}\n\nexport type { OrderedSetIterator };\n\nclass OrderedSet<K> extends TreeContainer<K, undefined> {\n  /**\n   * @param container - The initialization container.\n   * @param cmp - The compare function.\n   * @param enableIndex - Whether to enable iterator indexing function.\n   * @example\n   * new OrderedSet();\n   * new OrderedSet([0, 1, 2]);\n   * new OrderedSet([0, 1, 2], (x, y) => x - y);\n   * new OrderedSet([0, 1, 2], (x, y) => x - y, true);\n   */\n  constructor(\n    container: initContainer<K> = [],\n    cmp?: (x: K, y: K) => number,\n    enableIndex?: boolean\n  ) {\n    super(cmp, enableIndex);\n    const self = this;\n    container.forEach(function (el) {\n      self.insert(el);\n    });\n  }\n  /**\n   * @internal\n   */\n  private * _iterationFunc(\n    curNode: TreeNode<K, undefined> | undefined\n  ): Generator<K, void> {\n    if (curNode === undefined) return;\n    yield * this._iterationFunc(curNode._left);\n    yield curNode._key!;\n    yield * this._iterationFunc(curNode._right);\n  }\n  begin() {\n    return new OrderedSetIterator<K>(\n      this._header._left || this._header,\n      this._header,\n      this\n    );\n  }\n  end() {\n    return new OrderedSetIterator<K>(this._header, this._header, this);\n  }\n  rBegin() {\n    return new OrderedSetIterator<K>(\n      this._header._right || this._header,\n      this._header,\n      this,\n      IteratorType.REVERSE\n    );\n  }\n  rEnd() {\n    return new OrderedSetIterator<K>(this._header, this._header, this, IteratorType.REVERSE);\n  }\n  front() {\n    return this._header._left ? this._header._left._key : undefined;\n  }\n  back() {\n    return this._header._right ? this._header._right._key : undefined;\n  }\n  /**\n   * @description Insert element to set.\n   * @param key - The key want to insert.\n   * @param hint - You can give an iterator hint to improve insertion efficiency.\n   * @return The size of container after setting.\n   * @example\n   * const st = new OrderedSet([2, 4, 5]);\n   * const iter = st.begin();\n   * st.insert(1);\n   * st.insert(3, iter);  // give a hint will be faster.\n   */\n  insert(key: K, hint?: OrderedSetIterator<K>) {\n    return this._set(key, undefined, hint);\n  }\n  find(element: K) {\n    const resNode = this._findElementNode(this._root, element);\n    return new OrderedSetIterator<K>(resNode, this._header, this);\n  }\n  lowerBound(key: K) {\n    const resNode = this._lowerBound(this._root, key);\n    return new OrderedSetIterator<K>(resNode, this._header, this);\n  }\n  upperBound(key: K) {\n    const resNode = this._upperBound(this._root, key);\n    return new OrderedSetIterator<K>(resNode, this._header, this);\n  }\n  reverseLowerBound(key: K) {\n    const resNode = this._reverseLowerBound(this._root, key);\n    return new OrderedSetIterator<K>(resNode, this._header, this);\n  }\n  reverseUpperBound(key: K) {\n    const resNode = this._reverseUpperBound(this._root, key);\n    return new OrderedSetIterator<K>(resNode, this._header, this);\n  }\n  union(other: OrderedSet<K>) {\n    const self = this;\n    other.forEach(function (el) {\n      self.insert(el);\n    });\n    return this._length;\n  }\n  [Symbol.iterator]() {\n    return this._iterationFunc(this._root);\n  }\n  // @ts-ignore\n  eraseElementByIterator(iter: OrderedSetIterator<K>): OrderedSetIterator<K>;\n  // @ts-ignore\n  forEach(callback: (element: K, index: number, tree: OrderedSet<K>) => void): void;\n  // @ts-ignore\n  getElementByPos(pos: number): K;\n}\n\nexport default OrderedSet;\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/index.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/index.d.ts
new file mode 100644
index 0000000..a379bce
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/index.d.ts
@@ -0,0 +1,21 @@
+export { default as Stack } from "./container/OtherContainer/Stack";
+export { default as Queue } from "./container/OtherContainer/Queue";
+export { default as PriorityQueue } from "./container/OtherContainer/PriorityQueue";
+export { default as Vector } from "./container/SequentialContainer/Vector";
+export { default as LinkList } from "./container/SequentialContainer/LinkList";
+export { default as Deque } from "./container/SequentialContainer/Deque";
+export { default as OrderedSet } from "./container/TreeContainer/OrderedSet";
+export { default as OrderedMap } from "./container/TreeContainer/OrderedMap";
+export { default as HashSet } from "./container/HashContainer/HashSet";
+export { default as HashMap } from "./container/HashContainer/HashMap";
+export type { VectorIterator } from "./container/SequentialContainer/Vector";
+export type { LinkListIterator } from "./container/SequentialContainer/LinkList";
+export type { DequeIterator } from "./container/SequentialContainer/Deque";
+export type { OrderedSetIterator } from "./container/TreeContainer/OrderedSet";
+export type { OrderedMapIterator } from "./container/TreeContainer/OrderedMap";
+export type { HashSetIterator } from "./container/HashContainer/HashSet";
+export type { HashMapIterator } from "./container/HashContainer/HashMap";
+export type { IteratorType, Container, ContainerIterator } from "./container/ContainerBase";
+export type { default as SequentialContainer } from "./container/SequentialContainer/Base";
+export type { default as TreeContainer } from "./container/TreeContainer/Base";
+export type { HashContainer } from "./container/HashContainer/Base";
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/index.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/index.js
new file mode 100644
index 0000000..5ee919b
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/index.js
@@ -0,0 +1,20 @@
+export { default as Stack } from "./container/OtherContainer/Stack";
+
+export { default as Queue } from "./container/OtherContainer/Queue";
+
+export { default as PriorityQueue } from "./container/OtherContainer/PriorityQueue";
+
+export { default as Vector } from "./container/SequentialContainer/Vector";
+
+export { default as LinkList } from "./container/SequentialContainer/LinkList";
+
+export { default as Deque } from "./container/SequentialContainer/Deque";
+
+export { default as OrderedSet } from "./container/TreeContainer/OrderedSet";
+
+export { default as OrderedMap } from "./container/TreeContainer/OrderedMap";
+
+export { default as HashSet } from "./container/HashContainer/HashSet";
+
+export { default as HashMap } from "./container/HashContainer/HashMap";
+//# sourceMappingURL=index.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/index.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/index.js.map
new file mode 100644
index 0000000..ab59f83
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/index.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["../../src/index.ts"],"names":["default"],"mappings":"SAASA,wBAAkB;;SAClBA,wBAAkB;;SAClBA,gCAA0B;;SAC1BA,yBAAmB;;SACnBA,2BAAqB;;SACrBA,wBAAkB;;SAClBA,6BAAuB;;SACvBA,6BAAuB;;SACvBA,0BAAoB;;SACpBA,0BAAoB","file":"index.js","sourcesContent":["export { default as Stack } from '@/container/OtherContainer/Stack';\nexport { default as Queue } from '@/container/OtherContainer/Queue';\nexport { default as PriorityQueue } from '@/container/OtherContainer/PriorityQueue';\nexport { default as Vector } from '@/container/SequentialContainer/Vector';\nexport { default as LinkList } from '@/container/SequentialContainer/LinkList';\nexport { default as Deque } from '@/container/SequentialContainer/Deque';\nexport { default as OrderedSet } from '@/container/TreeContainer/OrderedSet';\nexport { default as OrderedMap } from '@/container/TreeContainer/OrderedMap';\nexport { default as HashSet } from '@/container/HashContainer/HashSet';\nexport { default as HashMap } from '@/container/HashContainer/HashMap';\nexport type { VectorIterator } from '@/container/SequentialContainer/Vector';\nexport type { LinkListIterator } from '@/container/SequentialContainer/LinkList';\nexport type { DequeIterator } from '@/container/SequentialContainer/Deque';\nexport type { OrderedSetIterator } from '@/container/TreeContainer/OrderedSet';\nexport type { OrderedMapIterator } from '@/container/TreeContainer/OrderedMap';\nexport type { HashSetIterator } from '@/container/HashContainer/HashSet';\nexport type { HashMapIterator } from '@/container/HashContainer/HashMap';\nexport type { IteratorType, Container, ContainerIterator } from '@/container/ContainerBase';\nexport type { default as SequentialContainer } from '@/container/SequentialContainer/Base';\nexport type { default as TreeContainer } from '@/container/TreeContainer/Base';\nexport type { HashContainer } from '@/container/HashContainer/Base';\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/checkObject.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/checkObject.d.ts
new file mode 100644
index 0000000..cb0ff5c
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/checkObject.d.ts
@@ -0,0 +1 @@
+export {};
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/checkObject.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/checkObject.js
new file mode 100644
index 0000000..5bc53d4
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/checkObject.js
@@ -0,0 +1,5 @@
+export default function checkObject(t) {
+    var e = typeof t;
+    return e === "object" && t !== null || e === "function";
+}
+//# sourceMappingURL=checkObject.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/checkObject.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/checkObject.js.map
new file mode 100644
index 0000000..5cdc589
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/checkObject.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["../../src/utils/checkObject.ts","utils/checkObject.js"],"names":["checkObject","key","t"],"mappings":"eAMc,SAAUA,YAAeC;IACrC,IAAMC,WAAWD;IACjB,OAAQC,MAAM,YAAYD,MAAQ,QAASC,MAAM;ACCnD","file":"checkObject.js","sourcesContent":["/**\n * @description Determine whether the type of key is `object`.\n * @param key - The key want to check.\n * @returns Whether the type of key is `object`.\n * @internal\n */\nexport default function checkObject<T>(key: T) {\n  const t = typeof key;\n  return (t === 'object' && key !== null) || t === 'function';\n}\n","/**\n * @description Determine whether the type of key is `object`.\n * @param key - The key want to check.\n * @returns Whether the type of key is `object`.\n * @internal\n */\nexport default function checkObject(key) {\n    var t = typeof key;\n    return (t === 'object' && key !== null) || t === 'function';\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/throwError.d.ts b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/throwError.d.ts
new file mode 100644
index 0000000..cb0ff5c
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/throwError.d.ts
@@ -0,0 +1 @@
+export {};
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/throwError.js b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/throwError.js
new file mode 100644
index 0000000..2602590
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/throwError.js
@@ -0,0 +1,4 @@
+export function throwIteratorAccessError() {
+    throw new RangeError("Iterator access denied!");
+}
+//# sourceMappingURL=throwError.js.map
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/throwError.js.map b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/throwError.js.map
new file mode 100644
index 0000000..239f7cd
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/esm/utils/throwError.js.map
@@ -0,0 +1 @@
+{"version":3,"sources":["../../src/utils/throwError.ts","utils/throwError.js"],"names":["throwIteratorAccessError","RangeError"],"mappings":"OAIM,SAAUA;IACd,MAAM,IAAIC,WAAW;ACCvB","file":"throwError.js","sourcesContent":["/**\n * @description Throw an iterator access error.\n * @internal\n */\nexport function throwIteratorAccessError() {\n  throw new RangeError('Iterator access denied!');\n}\n","/**\n * @description Throw an iterator access error.\n * @internal\n */\nexport function throwIteratorAccessError() {\n    throw new RangeError('Iterator access denied!');\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/umd/js-sdsl.js b/mqtt-backend/node_modules/js-sdsl/dist/umd/js-sdsl.js
new file mode 100644
index 0000000..a56342d
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/umd/js-sdsl.js
@@ -0,0 +1,3154 @@
+/*!
+ * js-sdsl v4.3.0
+ * https://github.com/js-sdsl/js-sdsl
+ * (c) 2021-present ZLY201 <zilongyao1366@gmail.com>
+ * MIT license
+ */
+
+(function (global, factory) {
+    typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
+    typeof define === 'function' && define.amd ? define(['exports'], factory) :
+    (global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.sdsl = {}));
+})(this, (function (exports) { 'use strict';
+
+    /******************************************************************************
+    Copyright (c) Microsoft Corporation.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose with or without fee is hereby granted.
+
+    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+    REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+    AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+    INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+    LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+    OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+    PERFORMANCE OF THIS SOFTWARE.
+    ***************************************************************************** */
+    /* global Reflect, Promise */
+
+    var extendStatics = function (d, b) {
+      extendStatics = Object.setPrototypeOf || {
+        __proto__: []
+      } instanceof Array && function (d, b) {
+        d.__proto__ = b;
+      } || function (d, b) {
+        for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p];
+      };
+      return extendStatics(d, b);
+    };
+    function __extends(d, b) {
+      if (typeof b !== "function" && b !== null) throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+      extendStatics(d, b);
+      function __() {
+        this.constructor = d;
+      }
+      d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    }
+    function __generator(thisArg, body) {
+      var _ = {
+          label: 0,
+          sent: function () {
+            if (t[0] & 1) throw t[1];
+            return t[1];
+          },
+          trys: [],
+          ops: []
+        },
+        f,
+        y,
+        t,
+        g;
+      return g = {
+        next: verb(0),
+        "throw": verb(1),
+        "return": verb(2)
+      }, typeof Symbol === "function" && (g[Symbol.iterator] = function () {
+        return this;
+      }), g;
+      function verb(n) {
+        return function (v) {
+          return step([n, v]);
+        };
+      }
+      function step(op) {
+        if (f) throw new TypeError("Generator is already executing.");
+        while (g && (g = 0, op[0] && (_ = 0)), _) try {
+          if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
+          if (y = 0, t) op = [op[0] & 2, t.value];
+          switch (op[0]) {
+            case 0:
+            case 1:
+              t = op;
+              break;
+            case 4:
+              _.label++;
+              return {
+                value: op[1],
+                done: false
+              };
+            case 5:
+              _.label++;
+              y = op[1];
+              op = [0];
+              continue;
+            case 7:
+              op = _.ops.pop();
+              _.trys.pop();
+              continue;
+            default:
+              if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) {
+                _ = 0;
+                continue;
+              }
+              if (op[0] === 3 && (!t || op[1] > t[0] && op[1] < t[3])) {
+                _.label = op[1];
+                break;
+              }
+              if (op[0] === 6 && _.label < t[1]) {
+                _.label = t[1];
+                t = op;
+                break;
+              }
+              if (t && _.label < t[2]) {
+                _.label = t[2];
+                _.ops.push(op);
+                break;
+              }
+              if (t[2]) _.ops.pop();
+              _.trys.pop();
+              continue;
+          }
+          op = body.call(thisArg, _);
+        } catch (e) {
+          op = [6, e];
+          y = 0;
+        } finally {
+          f = t = 0;
+        }
+        if (op[0] & 5) throw op[1];
+        return {
+          value: op[0] ? op[1] : void 0,
+          done: true
+        };
+      }
+    }
+    function __values(o) {
+      var s = typeof Symbol === "function" && Symbol.iterator,
+        m = s && o[s],
+        i = 0;
+      if (m) return m.call(o);
+      if (o && typeof o.length === "number") return {
+        next: function () {
+          if (o && i >= o.length) o = void 0;
+          return {
+            value: o && o[i++],
+            done: !o
+          };
+        }
+      };
+      throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
+    }
+    function __read(o, n) {
+      var m = typeof Symbol === "function" && o[Symbol.iterator];
+      if (!m) return o;
+      var i = m.call(o),
+        r,
+        ar = [],
+        e;
+      try {
+        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
+      } catch (error) {
+        e = {
+          error: error
+        };
+      } finally {
+        try {
+          if (r && !r.done && (m = i["return"])) m.call(i);
+        } finally {
+          if (e) throw e.error;
+        }
+      }
+      return ar;
+    }
+    function __spreadArray(to, from, pack) {
+      if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
+        if (ar || !(i in from)) {
+          if (!ar) ar = Array.prototype.slice.call(from, 0, i);
+          ar[i] = from[i];
+        }
+      }
+      return to.concat(ar || Array.prototype.slice.call(from));
+    }
+
+    var ContainerIterator = /** @class */function () {
+      /**
+       * @internal
+       */
+      function ContainerIterator(iteratorType) {
+        if (iteratorType === void 0) {
+          iteratorType = 0 /* IteratorType.NORMAL */;
+        }
+        this.iteratorType = iteratorType;
+      }
+      /**
+       * @param iter - The other iterator you want to compare.
+       * @returns Whether this equals to obj.
+       * @example
+       * container.find(1).equals(container.end());
+       */
+      ContainerIterator.prototype.equals = function (iter) {
+        return this._node === iter._node;
+      };
+      return ContainerIterator;
+    }();
+    var Base = /** @class */function () {
+      function Base() {
+        /**
+         * @description Container's size.
+         * @internal
+         */
+        this._length = 0;
+      }
+      Object.defineProperty(Base.prototype, "length", {
+        /**
+         * @returns The size of the container.
+         * @example
+         * const container = new Vector([1, 2]);
+         * console.log(container.length); // 2
+         */
+        get: function () {
+          return this._length;
+        },
+        enumerable: false,
+        configurable: true
+      });
+      /**
+       * @returns The size of the container.
+       * @example
+       * const container = new Vector([1, 2]);
+       * console.log(container.size()); // 2
+       */
+      Base.prototype.size = function () {
+        return this._length;
+      };
+      /**
+       * @returns Whether the container is empty.
+       * @example
+       * container.clear();
+       * console.log(container.empty());  // true
+       */
+      Base.prototype.empty = function () {
+        return this._length === 0;
+      };
+      return Base;
+    }();
+    var Container = /** @class */function (_super) {
+      __extends(Container, _super);
+      function Container() {
+        return _super !== null && _super.apply(this, arguments) || this;
+      }
+      return Container;
+    }(Base);
+
+    var Stack = /** @class */function (_super) {
+      __extends(Stack, _super);
+      function Stack(container) {
+        if (container === void 0) {
+          container = [];
+        }
+        var _this = _super.call(this) || this;
+        /**
+         * @internal
+         */
+        _this._stack = [];
+        var self = _this;
+        container.forEach(function (el) {
+          self.push(el);
+        });
+        return _this;
+      }
+      Stack.prototype.clear = function () {
+        this._length = 0;
+        this._stack = [];
+      };
+      /**
+       * @description Insert element to stack's end.
+       * @description The element you want to push to the back.
+       * @returns The container length after erasing.
+       */
+      Stack.prototype.push = function (element) {
+        this._stack.push(element);
+        this._length += 1;
+        return this._length;
+      };
+      /**
+       * @description Removes the end element.
+       * @returns The element you popped.
+       */
+      Stack.prototype.pop = function () {
+        if (this._length === 0) return;
+        this._length -= 1;
+        return this._stack.pop();
+      };
+      /**
+       * @description Accesses the end element.
+       * @returns The last element.
+       */
+      Stack.prototype.top = function () {
+        return this._stack[this._length - 1];
+      };
+      return Stack;
+    }(Base);
+
+    var Queue = /** @class */function (_super) {
+      __extends(Queue, _super);
+      function Queue(container) {
+        if (container === void 0) {
+          container = [];
+        }
+        var _this = _super.call(this) || this;
+        /**
+         * @internal
+         */
+        _this._first = 0;
+        /**
+         * @internal
+         */
+        _this._queue = [];
+        var self = _this;
+        container.forEach(function (el) {
+          self.push(el);
+        });
+        return _this;
+      }
+      Queue.prototype.clear = function () {
+        this._queue = [];
+        this._length = this._first = 0;
+      };
+      /**
+       * @description Inserts element to queue's end.
+       * @param element - The element you want to push to the front.
+       * @returns The container length after pushing.
+       */
+      Queue.prototype.push = function (element) {
+        var capacity = this._queue.length;
+        if (this._first / capacity > 0.5 /* QUEUE_CONSTANT.ALLOCATE_SIGMA */ && this._first + this._length >= capacity && capacity > 4096 /* QUEUE_CONSTANT.MIN_ALLOCATE_SIZE */) {
+          var length_1 = this._length;
+          for (var i = 0; i < length_1; ++i) {
+            this._queue[i] = this._queue[this._first + i];
+          }
+          this._first = 0;
+          this._queue[this._length] = element;
+        } else this._queue[this._first + this._length] = element;
+        return ++this._length;
+      };
+      /**
+       * @description Removes the first element.
+       * @returns The element you popped.
+       */
+      Queue.prototype.pop = function () {
+        if (this._length === 0) return;
+        var el = this._queue[this._first++];
+        this._length -= 1;
+        return el;
+      };
+      /**
+       * @description Access the first element.
+       * @returns The first element.
+       */
+      Queue.prototype.front = function () {
+        if (this._length === 0) return;
+        return this._queue[this._first];
+      };
+      return Queue;
+    }(Base);
+
+    var PriorityQueue = /** @class */function (_super) {
+      __extends(PriorityQueue, _super);
+      /**
+       * @description PriorityQueue's constructor.
+       * @param container - Initialize container, must have a forEach function.
+       * @param cmp - Compare function.
+       * @param copy - When the container is an array, you can choose to directly operate on the original object of
+       *               the array or perform a shallow copy. The default is shallow copy.
+       * @example
+       * new PriorityQueue();
+       * new PriorityQueue([1, 2, 3]);
+       * new PriorityQueue([1, 2, 3], (x, y) => x - y);
+       * new PriorityQueue([1, 2, 3], (x, y) => x - y, false);
+       */
+      function PriorityQueue(container, cmp, copy) {
+        if (container === void 0) {
+          container = [];
+        }
+        if (cmp === void 0) {
+          cmp = function (x, y) {
+            if (x > y) return -1;
+            if (x < y) return 1;
+            return 0;
+          };
+        }
+        if (copy === void 0) {
+          copy = true;
+        }
+        var _this = _super.call(this) || this;
+        _this._cmp = cmp;
+        if (Array.isArray(container)) {
+          _this._priorityQueue = copy ? __spreadArray([], __read(container), false) : container;
+        } else {
+          _this._priorityQueue = [];
+          var self_1 = _this;
+          container.forEach(function (el) {
+            self_1._priorityQueue.push(el);
+          });
+        }
+        _this._length = _this._priorityQueue.length;
+        var halfLength = _this._length >> 1;
+        for (var parent_1 = _this._length - 1 >> 1; parent_1 >= 0; --parent_1) {
+          _this._pushDown(parent_1, halfLength);
+        }
+        return _this;
+      }
+      /**
+       * @internal
+       */
+      PriorityQueue.prototype._pushUp = function (pos) {
+        var item = this._priorityQueue[pos];
+        while (pos > 0) {
+          var parent_2 = pos - 1 >> 1;
+          var parentItem = this._priorityQueue[parent_2];
+          if (this._cmp(parentItem, item) <= 0) break;
+          this._priorityQueue[pos] = parentItem;
+          pos = parent_2;
+        }
+        this._priorityQueue[pos] = item;
+      };
+      /**
+       * @internal
+       */
+      PriorityQueue.prototype._pushDown = function (pos, halfLength) {
+        var item = this._priorityQueue[pos];
+        while (pos < halfLength) {
+          var left = pos << 1 | 1;
+          var right = left + 1;
+          var minItem = this._priorityQueue[left];
+          if (right < this._length && this._cmp(minItem, this._priorityQueue[right]) > 0) {
+            left = right;
+            minItem = this._priorityQueue[right];
+          }
+          if (this._cmp(minItem, item) >= 0) break;
+          this._priorityQueue[pos] = minItem;
+          pos = left;
+        }
+        this._priorityQueue[pos] = item;
+      };
+      PriorityQueue.prototype.clear = function () {
+        this._length = 0;
+        this._priorityQueue.length = 0;
+      };
+      /**
+       * @description Push element into a container in order.
+       * @param item - The element you want to push.
+       * @returns The size of heap after pushing.
+       * @example
+       * queue.push(1);
+       */
+      PriorityQueue.prototype.push = function (item) {
+        this._priorityQueue.push(item);
+        this._pushUp(this._length);
+        this._length += 1;
+      };
+      /**
+       * @description Removes the top element.
+       * @returns The element you popped.
+       * @example
+       * queue.pop();
+       */
+      PriorityQueue.prototype.pop = function () {
+        if (this._length === 0) return;
+        var value = this._priorityQueue[0];
+        var last = this._priorityQueue.pop();
+        this._length -= 1;
+        if (this._length) {
+          this._priorityQueue[0] = last;
+          this._pushDown(0, this._length >> 1);
+        }
+        return value;
+      };
+      /**
+       * @description Accesses the top element.
+       * @example
+       * const top = queue.top();
+       */
+      PriorityQueue.prototype.top = function () {
+        return this._priorityQueue[0];
+      };
+      /**
+       * @description Check if element is in heap.
+       * @param item - The item want to find.
+       * @returns Whether element is in heap.
+       * @example
+       * const que = new PriorityQueue([], (x, y) => x.id - y.id);
+       * const obj = { id: 1 };
+       * que.push(obj);
+       * console.log(que.find(obj));  // true
+       */
+      PriorityQueue.prototype.find = function (item) {
+        return this._priorityQueue.indexOf(item) >= 0;
+      };
+      /**
+       * @description Remove specified item from heap.
+       * @param item - The item want to remove.
+       * @returns Whether remove success.
+       * @example
+       * const que = new PriorityQueue([], (x, y) => x.id - y.id);
+       * const obj = { id: 1 };
+       * que.push(obj);
+       * que.remove(obj);
+       */
+      PriorityQueue.prototype.remove = function (item) {
+        var index = this._priorityQueue.indexOf(item);
+        if (index < 0) return false;
+        if (index === 0) {
+          this.pop();
+        } else if (index === this._length - 1) {
+          this._priorityQueue.pop();
+          this._length -= 1;
+        } else {
+          this._priorityQueue.splice(index, 1, this._priorityQueue.pop());
+          this._length -= 1;
+          this._pushUp(index);
+          this._pushDown(index, this._length >> 1);
+        }
+        return true;
+      };
+      /**
+       * @description Update item and it's pos in the heap.
+       * @param item - The item want to update.
+       * @returns Whether update success.
+       * @example
+       * const que = new PriorityQueue([], (x, y) => x.id - y.id);
+       * const obj = { id: 1 };
+       * que.push(obj);
+       * obj.id = 2;
+       * que.updateItem(obj);
+       */
+      PriorityQueue.prototype.updateItem = function (item) {
+        var index = this._priorityQueue.indexOf(item);
+        if (index < 0) return false;
+        this._pushUp(index);
+        this._pushDown(index, this._length >> 1);
+        return true;
+      };
+      /**
+       * @returns Return a copy array of heap.
+       * @example
+       * const arr = queue.toArray();
+       */
+      PriorityQueue.prototype.toArray = function () {
+        return __spreadArray([], __read(this._priorityQueue), false);
+      };
+      return PriorityQueue;
+    }(Base);
+
+    var SequentialContainer = /** @class */function (_super) {
+      __extends(SequentialContainer, _super);
+      function SequentialContainer() {
+        return _super !== null && _super.apply(this, arguments) || this;
+      }
+      return SequentialContainer;
+    }(Container);
+
+    /**
+     * @description Throw an iterator access error.
+     * @internal
+     */
+    function throwIteratorAccessError() {
+      throw new RangeError('Iterator access denied!');
+    }
+
+    var RandomIterator = /** @class */function (_super) {
+      __extends(RandomIterator, _super);
+      /**
+       * @internal
+       */
+      function RandomIterator(index, iteratorType) {
+        var _this = _super.call(this, iteratorType) || this;
+        _this._node = index;
+        if (_this.iteratorType === 0 /* IteratorType.NORMAL */) {
+          _this.pre = function () {
+            if (this._node === 0) {
+              throwIteratorAccessError();
+            }
+            this._node -= 1;
+            return this;
+          };
+          _this.next = function () {
+            if (this._node === this.container.size()) {
+              throwIteratorAccessError();
+            }
+            this._node += 1;
+            return this;
+          };
+        } else {
+          _this.pre = function () {
+            if (this._node === this.container.size() - 1) {
+              throwIteratorAccessError();
+            }
+            this._node += 1;
+            return this;
+          };
+          _this.next = function () {
+            if (this._node === -1) {
+              throwIteratorAccessError();
+            }
+            this._node -= 1;
+            return this;
+          };
+        }
+        return _this;
+      }
+      Object.defineProperty(RandomIterator.prototype, "pointer", {
+        get: function () {
+          return this.container.getElementByPos(this._node);
+        },
+        set: function (newValue) {
+          this.container.setElementByPos(this._node, newValue);
+        },
+        enumerable: false,
+        configurable: true
+      });
+      return RandomIterator;
+    }(ContainerIterator);
+
+    var VectorIterator = /** @class */function (_super) {
+      __extends(VectorIterator, _super);
+      function VectorIterator(node, container, iteratorType) {
+        var _this = _super.call(this, node, iteratorType) || this;
+        _this.container = container;
+        return _this;
+      }
+      VectorIterator.prototype.copy = function () {
+        return new VectorIterator(this._node, this.container, this.iteratorType);
+      };
+      return VectorIterator;
+    }(RandomIterator);
+    var Vector = /** @class */function (_super) {
+      __extends(Vector, _super);
+      /**
+       * @param container - Initialize container, must have a forEach function.
+       * @param copy - When the container is an array, you can choose to directly operate on the original object of
+       *               the array or perform a shallow copy. The default is shallow copy.
+       */
+      function Vector(container, copy) {
+        if (container === void 0) {
+          container = [];
+        }
+        if (copy === void 0) {
+          copy = true;
+        }
+        var _this = _super.call(this) || this;
+        if (Array.isArray(container)) {
+          _this._vector = copy ? __spreadArray([], __read(container), false) : container;
+          _this._length = container.length;
+        } else {
+          _this._vector = [];
+          var self_1 = _this;
+          container.forEach(function (el) {
+            self_1.pushBack(el);
+          });
+        }
+        return _this;
+      }
+      Vector.prototype.clear = function () {
+        this._length = 0;
+        this._vector.length = 0;
+      };
+      Vector.prototype.begin = function () {
+        return new VectorIterator(0, this);
+      };
+      Vector.prototype.end = function () {
+        return new VectorIterator(this._length, this);
+      };
+      Vector.prototype.rBegin = function () {
+        return new VectorIterator(this._length - 1, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      Vector.prototype.rEnd = function () {
+        return new VectorIterator(-1, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      Vector.prototype.front = function () {
+        return this._vector[0];
+      };
+      Vector.prototype.back = function () {
+        return this._vector[this._length - 1];
+      };
+      Vector.prototype.getElementByPos = function (pos) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        return this._vector[pos];
+      };
+      Vector.prototype.eraseElementByPos = function (pos) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        this._vector.splice(pos, 1);
+        this._length -= 1;
+        return this._length;
+      };
+      Vector.prototype.eraseElementByValue = function (value) {
+        var index = 0;
+        for (var i = 0; i < this._length; ++i) {
+          if (this._vector[i] !== value) {
+            this._vector[index++] = this._vector[i];
+          }
+        }
+        this._length = this._vector.length = index;
+        return this._length;
+      };
+      Vector.prototype.eraseElementByIterator = function (iter) {
+        var _node = iter._node;
+        iter = iter.next();
+        this.eraseElementByPos(_node);
+        return iter;
+      };
+      Vector.prototype.pushBack = function (element) {
+        this._vector.push(element);
+        this._length += 1;
+        return this._length;
+      };
+      Vector.prototype.popBack = function () {
+        if (this._length === 0) return;
+        this._length -= 1;
+        return this._vector.pop();
+      };
+      Vector.prototype.setElementByPos = function (pos, element) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        this._vector[pos] = element;
+      };
+      Vector.prototype.insert = function (pos, element, num) {
+        var _a;
+        if (num === void 0) {
+          num = 1;
+        }
+        if (pos < 0 || pos > this._length) {
+          throw new RangeError();
+        }
+        (_a = this._vector).splice.apply(_a, __spreadArray([pos, 0], __read(new Array(num).fill(element)), false));
+        this._length += num;
+        return this._length;
+      };
+      Vector.prototype.find = function (element) {
+        for (var i = 0; i < this._length; ++i) {
+          if (this._vector[i] === element) {
+            return new VectorIterator(i, this);
+          }
+        }
+        return this.end();
+      };
+      Vector.prototype.reverse = function () {
+        this._vector.reverse();
+      };
+      Vector.prototype.unique = function () {
+        var index = 1;
+        for (var i = 1; i < this._length; ++i) {
+          if (this._vector[i] !== this._vector[i - 1]) {
+            this._vector[index++] = this._vector[i];
+          }
+        }
+        this._length = this._vector.length = index;
+        return this._length;
+      };
+      Vector.prototype.sort = function (cmp) {
+        this._vector.sort(cmp);
+      };
+      Vector.prototype.forEach = function (callback) {
+        for (var i = 0; i < this._length; ++i) {
+          callback(this._vector[i], i, this);
+        }
+      };
+      Vector.prototype[Symbol.iterator] = function () {
+        return function () {
+          return __generator(this, function (_a) {
+            switch (_a.label) {
+              case 0:
+                return [5 /*yield**/, __values(this._vector)];
+              case 1:
+                _a.sent();
+                return [2 /*return*/];
+            }
+          });
+        }.bind(this)();
+      };
+      return Vector;
+    }(SequentialContainer);
+
+    var LinkListIterator = /** @class */function (_super) {
+      __extends(LinkListIterator, _super);
+      /**
+       * @internal
+       */
+      function LinkListIterator(_node, _header, container, iteratorType) {
+        var _this = _super.call(this, iteratorType) || this;
+        _this._node = _node;
+        _this._header = _header;
+        _this.container = container;
+        if (_this.iteratorType === 0 /* IteratorType.NORMAL */) {
+          _this.pre = function () {
+            if (this._node._pre === this._header) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._pre;
+            return this;
+          };
+          _this.next = function () {
+            if (this._node === this._header) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._next;
+            return this;
+          };
+        } else {
+          _this.pre = function () {
+            if (this._node._next === this._header) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._next;
+            return this;
+          };
+          _this.next = function () {
+            if (this._node === this._header) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._pre;
+            return this;
+          };
+        }
+        return _this;
+      }
+      Object.defineProperty(LinkListIterator.prototype, "pointer", {
+        get: function () {
+          if (this._node === this._header) {
+            throwIteratorAccessError();
+          }
+          return this._node._value;
+        },
+        set: function (newValue) {
+          if (this._node === this._header) {
+            throwIteratorAccessError();
+          }
+          this._node._value = newValue;
+        },
+        enumerable: false,
+        configurable: true
+      });
+      LinkListIterator.prototype.copy = function () {
+        return new LinkListIterator(this._node, this._header, this.container, this.iteratorType);
+      };
+      return LinkListIterator;
+    }(ContainerIterator);
+    var LinkList = /** @class */function (_super) {
+      __extends(LinkList, _super);
+      function LinkList(container) {
+        if (container === void 0) {
+          container = [];
+        }
+        var _this = _super.call(this) || this;
+        _this._header = {};
+        _this._head = _this._tail = _this._header._pre = _this._header._next = _this._header;
+        var self = _this;
+        container.forEach(function (el) {
+          self.pushBack(el);
+        });
+        return _this;
+      }
+      /**
+       * @internal
+       */
+      LinkList.prototype._eraseNode = function (node) {
+        var _pre = node._pre,
+          _next = node._next;
+        _pre._next = _next;
+        _next._pre = _pre;
+        if (node === this._head) {
+          this._head = _next;
+        }
+        if (node === this._tail) {
+          this._tail = _pre;
+        }
+        this._length -= 1;
+      };
+      /**
+       * @internal
+       */
+      LinkList.prototype._insertNode = function (value, pre) {
+        var next = pre._next;
+        var node = {
+          _value: value,
+          _pre: pre,
+          _next: next
+        };
+        pre._next = node;
+        next._pre = node;
+        if (pre === this._header) {
+          this._head = node;
+        }
+        if (next === this._header) {
+          this._tail = node;
+        }
+        this._length += 1;
+      };
+      LinkList.prototype.clear = function () {
+        this._length = 0;
+        this._head = this._tail = this._header._pre = this._header._next = this._header;
+      };
+      LinkList.prototype.begin = function () {
+        return new LinkListIterator(this._head, this._header, this);
+      };
+      LinkList.prototype.end = function () {
+        return new LinkListIterator(this._header, this._header, this);
+      };
+      LinkList.prototype.rBegin = function () {
+        return new LinkListIterator(this._tail, this._header, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      LinkList.prototype.rEnd = function () {
+        return new LinkListIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      LinkList.prototype.front = function () {
+        return this._head._value;
+      };
+      LinkList.prototype.back = function () {
+        return this._tail._value;
+      };
+      LinkList.prototype.getElementByPos = function (pos) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        var curNode = this._head;
+        while (pos--) {
+          curNode = curNode._next;
+        }
+        return curNode._value;
+      };
+      LinkList.prototype.eraseElementByPos = function (pos) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        var curNode = this._head;
+        while (pos--) {
+          curNode = curNode._next;
+        }
+        this._eraseNode(curNode);
+        return this._length;
+      };
+      LinkList.prototype.eraseElementByValue = function (_value) {
+        var curNode = this._head;
+        while (curNode !== this._header) {
+          if (curNode._value === _value) {
+            this._eraseNode(curNode);
+          }
+          curNode = curNode._next;
+        }
+        return this._length;
+      };
+      LinkList.prototype.eraseElementByIterator = function (iter) {
+        var node = iter._node;
+        if (node === this._header) {
+          throwIteratorAccessError();
+        }
+        iter = iter.next();
+        this._eraseNode(node);
+        return iter;
+      };
+      LinkList.prototype.pushBack = function (element) {
+        this._insertNode(element, this._tail);
+        return this._length;
+      };
+      LinkList.prototype.popBack = function () {
+        if (this._length === 0) return;
+        var value = this._tail._value;
+        this._eraseNode(this._tail);
+        return value;
+      };
+      /**
+       * @description Push an element to the front.
+       * @param element - The element you want to push.
+       * @returns The size of queue after pushing.
+       */
+      LinkList.prototype.pushFront = function (element) {
+        this._insertNode(element, this._header);
+        return this._length;
+      };
+      /**
+       * @description Removes the first element.
+       * @returns The element you popped.
+       */
+      LinkList.prototype.popFront = function () {
+        if (this._length === 0) return;
+        var value = this._head._value;
+        this._eraseNode(this._head);
+        return value;
+      };
+      LinkList.prototype.setElementByPos = function (pos, element) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        var curNode = this._head;
+        while (pos--) {
+          curNode = curNode._next;
+        }
+        curNode._value = element;
+      };
+      LinkList.prototype.insert = function (pos, element, num) {
+        if (num === void 0) {
+          num = 1;
+        }
+        if (pos < 0 || pos > this._length) {
+          throw new RangeError();
+        }
+        if (num <= 0) return this._length;
+        if (pos === 0) {
+          while (num--) this.pushFront(element);
+        } else if (pos === this._length) {
+          while (num--) this.pushBack(element);
+        } else {
+          var curNode = this._head;
+          for (var i = 1; i < pos; ++i) {
+            curNode = curNode._next;
+          }
+          var next = curNode._next;
+          this._length += num;
+          while (num--) {
+            curNode._next = {
+              _value: element,
+              _pre: curNode
+            };
+            curNode._next._pre = curNode;
+            curNode = curNode._next;
+          }
+          curNode._next = next;
+          next._pre = curNode;
+        }
+        return this._length;
+      };
+      LinkList.prototype.find = function (element) {
+        var curNode = this._head;
+        while (curNode !== this._header) {
+          if (curNode._value === element) {
+            return new LinkListIterator(curNode, this._header, this);
+          }
+          curNode = curNode._next;
+        }
+        return this.end();
+      };
+      LinkList.prototype.reverse = function () {
+        if (this._length <= 1) return;
+        var pHead = this._head;
+        var pTail = this._tail;
+        var cnt = 0;
+        while (cnt << 1 < this._length) {
+          var tmp = pHead._value;
+          pHead._value = pTail._value;
+          pTail._value = tmp;
+          pHead = pHead._next;
+          pTail = pTail._pre;
+          cnt += 1;
+        }
+      };
+      LinkList.prototype.unique = function () {
+        if (this._length <= 1) {
+          return this._length;
+        }
+        var curNode = this._head;
+        while (curNode !== this._header) {
+          var tmpNode = curNode;
+          while (tmpNode._next !== this._header && tmpNode._value === tmpNode._next._value) {
+            tmpNode = tmpNode._next;
+            this._length -= 1;
+          }
+          curNode._next = tmpNode._next;
+          curNode._next._pre = curNode;
+          curNode = curNode._next;
+        }
+        return this._length;
+      };
+      LinkList.prototype.sort = function (cmp) {
+        if (this._length <= 1) return;
+        var arr = [];
+        this.forEach(function (el) {
+          arr.push(el);
+        });
+        arr.sort(cmp);
+        var curNode = this._head;
+        arr.forEach(function (element) {
+          curNode._value = element;
+          curNode = curNode._next;
+        });
+      };
+      /**
+       * @description Merges two sorted lists.
+       * @param list - The other list you want to merge (must be sorted).
+       * @returns The size of list after merging.
+       * @example
+       * const linkA = new LinkList([1, 3, 5]);
+       * const linkB = new LinkList([2, 4, 6]);
+       * linkA.merge(linkB);  // [1, 2, 3, 4, 5];
+       */
+      LinkList.prototype.merge = function (list) {
+        var self = this;
+        if (this._length === 0) {
+          list.forEach(function (el) {
+            self.pushBack(el);
+          });
+        } else {
+          var curNode_1 = this._head;
+          list.forEach(function (el) {
+            while (curNode_1 !== self._header && curNode_1._value <= el) {
+              curNode_1 = curNode_1._next;
+            }
+            self._insertNode(el, curNode_1._pre);
+          });
+        }
+        return this._length;
+      };
+      LinkList.prototype.forEach = function (callback) {
+        var curNode = this._head;
+        var index = 0;
+        while (curNode !== this._header) {
+          callback(curNode._value, index++, this);
+          curNode = curNode._next;
+        }
+      };
+      LinkList.prototype[Symbol.iterator] = function () {
+        return function () {
+          var curNode;
+          return __generator(this, function (_a) {
+            switch (_a.label) {
+              case 0:
+                if (this._length === 0) return [2 /*return*/];
+                curNode = this._head;
+                _a.label = 1;
+              case 1:
+                if (!(curNode !== this._header)) return [3 /*break*/, 3];
+                return [4 /*yield*/, curNode._value];
+              case 2:
+                _a.sent();
+                curNode = curNode._next;
+                return [3 /*break*/, 1];
+              case 3:
+                return [2 /*return*/];
+            }
+          });
+        }.bind(this)();
+      };
+      return LinkList;
+    }(SequentialContainer);
+
+    var DequeIterator = /** @class */function (_super) {
+      __extends(DequeIterator, _super);
+      function DequeIterator(node, container, iteratorType) {
+        var _this = _super.call(this, node, iteratorType) || this;
+        _this.container = container;
+        return _this;
+      }
+      DequeIterator.prototype.copy = function () {
+        return new DequeIterator(this._node, this.container, this.iteratorType);
+      };
+      return DequeIterator;
+    }(RandomIterator);
+    var Deque = /** @class */function (_super) {
+      __extends(Deque, _super);
+      function Deque(container, _bucketSize) {
+        if (container === void 0) {
+          container = [];
+        }
+        if (_bucketSize === void 0) {
+          _bucketSize = 1 << 12;
+        }
+        var _this = _super.call(this) || this;
+        /**
+         * @internal
+         */
+        _this._first = 0;
+        /**
+         * @internal
+         */
+        _this._curFirst = 0;
+        /**
+         * @internal
+         */
+        _this._last = 0;
+        /**
+         * @internal
+         */
+        _this._curLast = 0;
+        /**
+         * @internal
+         */
+        _this._bucketNum = 0;
+        /**
+         * @internal
+         */
+        _this._map = [];
+        var _length = function () {
+          if (typeof container.length === "number") return container.length;
+          if (typeof container.size === "number") return container.size;
+          if (typeof container.size === "function") return container.size();
+          throw new TypeError("Cannot get the length or size of the container");
+        }();
+        _this._bucketSize = _bucketSize;
+        _this._bucketNum = Math.max(Math.ceil(_length / _this._bucketSize), 1);
+        for (var i = 0; i < _this._bucketNum; ++i) {
+          _this._map.push(new Array(_this._bucketSize));
+        }
+        var needBucketNum = Math.ceil(_length / _this._bucketSize);
+        _this._first = _this._last = (_this._bucketNum >> 1) - (needBucketNum >> 1);
+        _this._curFirst = _this._curLast = _this._bucketSize - _length % _this._bucketSize >> 1;
+        var self = _this;
+        container.forEach(function (element) {
+          self.pushBack(element);
+        });
+        return _this;
+      }
+      /**
+       * @description Growth the Deque.
+       * @internal
+       */
+      Deque.prototype._reAllocate = function () {
+        var newMap = [];
+        var addBucketNum = Math.max(this._bucketNum >> 1, 1);
+        for (var i = 0; i < addBucketNum; ++i) {
+          newMap[i] = new Array(this._bucketSize);
+        }
+        for (var i = this._first; i < this._bucketNum; ++i) {
+          newMap[newMap.length] = this._map[i];
+        }
+        for (var i = 0; i < this._last; ++i) {
+          newMap[newMap.length] = this._map[i];
+        }
+        newMap[newMap.length] = __spreadArray([], __read(this._map[this._last]), false);
+        this._first = addBucketNum;
+        this._last = newMap.length - 1;
+        for (var i = 0; i < addBucketNum; ++i) {
+          newMap[newMap.length] = new Array(this._bucketSize);
+        }
+        this._map = newMap;
+        this._bucketNum = newMap.length;
+      };
+      /**
+       * @description Get the bucket position of the element and the pointer position by index.
+       * @param pos - The element's index.
+       * @internal
+       */
+      Deque.prototype._getElementIndex = function (pos) {
+        var offset = this._curFirst + pos + 1;
+        var offsetRemainder = offset % this._bucketSize;
+        var curNodePointerIndex = offsetRemainder - 1;
+        var curNodeBucketIndex = this._first + (offset - offsetRemainder) / this._bucketSize;
+        if (offsetRemainder === 0) curNodeBucketIndex -= 1;
+        curNodeBucketIndex %= this._bucketNum;
+        if (curNodePointerIndex < 0) curNodePointerIndex += this._bucketSize;
+        return {
+          curNodeBucketIndex: curNodeBucketIndex,
+          curNodePointerIndex: curNodePointerIndex
+        };
+      };
+      Deque.prototype.clear = function () {
+        this._map = [new Array(this._bucketSize)];
+        this._bucketNum = 1;
+        this._first = this._last = this._length = 0;
+        this._curFirst = this._curLast = this._bucketSize >> 1;
+      };
+      Deque.prototype.begin = function () {
+        return new DequeIterator(0, this);
+      };
+      Deque.prototype.end = function () {
+        return new DequeIterator(this._length, this);
+      };
+      Deque.prototype.rBegin = function () {
+        return new DequeIterator(this._length - 1, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      Deque.prototype.rEnd = function () {
+        return new DequeIterator(-1, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      Deque.prototype.front = function () {
+        if (this._length === 0) return;
+        return this._map[this._first][this._curFirst];
+      };
+      Deque.prototype.back = function () {
+        if (this._length === 0) return;
+        return this._map[this._last][this._curLast];
+      };
+      Deque.prototype.pushBack = function (element) {
+        if (this._length) {
+          if (this._curLast < this._bucketSize - 1) {
+            this._curLast += 1;
+          } else if (this._last < this._bucketNum - 1) {
+            this._last += 1;
+            this._curLast = 0;
+          } else {
+            this._last = 0;
+            this._curLast = 0;
+          }
+          if (this._last === this._first && this._curLast === this._curFirst) this._reAllocate();
+        }
+        this._length += 1;
+        this._map[this._last][this._curLast] = element;
+        return this._length;
+      };
+      Deque.prototype.popBack = function () {
+        if (this._length === 0) return;
+        var value = this._map[this._last][this._curLast];
+        if (this._length !== 1) {
+          if (this._curLast > 0) {
+            this._curLast -= 1;
+          } else if (this._last > 0) {
+            this._last -= 1;
+            this._curLast = this._bucketSize - 1;
+          } else {
+            this._last = this._bucketNum - 1;
+            this._curLast = this._bucketSize - 1;
+          }
+        }
+        this._length -= 1;
+        return value;
+      };
+      /**
+       * @description Push the element to the front.
+       * @param element - The element you want to push.
+       * @returns The size of queue after pushing.
+       */
+      Deque.prototype.pushFront = function (element) {
+        if (this._length) {
+          if (this._curFirst > 0) {
+            this._curFirst -= 1;
+          } else if (this._first > 0) {
+            this._first -= 1;
+            this._curFirst = this._bucketSize - 1;
+          } else {
+            this._first = this._bucketNum - 1;
+            this._curFirst = this._bucketSize - 1;
+          }
+          if (this._first === this._last && this._curFirst === this._curLast) this._reAllocate();
+        }
+        this._length += 1;
+        this._map[this._first][this._curFirst] = element;
+        return this._length;
+      };
+      /**
+       * @description Remove the _first element.
+       * @returns The element you popped.
+       */
+      Deque.prototype.popFront = function () {
+        if (this._length === 0) return;
+        var value = this._map[this._first][this._curFirst];
+        if (this._length !== 1) {
+          if (this._curFirst < this._bucketSize - 1) {
+            this._curFirst += 1;
+          } else if (this._first < this._bucketNum - 1) {
+            this._first += 1;
+            this._curFirst = 0;
+          } else {
+            this._first = 0;
+            this._curFirst = 0;
+          }
+        }
+        this._length -= 1;
+        return value;
+      };
+      Deque.prototype.getElementByPos = function (pos) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        var _a = this._getElementIndex(pos),
+          curNodeBucketIndex = _a.curNodeBucketIndex,
+          curNodePointerIndex = _a.curNodePointerIndex;
+        return this._map[curNodeBucketIndex][curNodePointerIndex];
+      };
+      Deque.prototype.setElementByPos = function (pos, element) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        var _a = this._getElementIndex(pos),
+          curNodeBucketIndex = _a.curNodeBucketIndex,
+          curNodePointerIndex = _a.curNodePointerIndex;
+        this._map[curNodeBucketIndex][curNodePointerIndex] = element;
+      };
+      Deque.prototype.insert = function (pos, element, num) {
+        if (num === void 0) {
+          num = 1;
+        }
+        if (pos < 0 || pos > this._length) {
+          throw new RangeError();
+        }
+        if (pos === 0) {
+          while (num--) this.pushFront(element);
+        } else if (pos === this._length) {
+          while (num--) this.pushBack(element);
+        } else {
+          var arr = [];
+          for (var i = pos; i < this._length; ++i) {
+            arr.push(this.getElementByPos(i));
+          }
+          this.cut(pos - 1);
+          for (var i = 0; i < num; ++i) this.pushBack(element);
+          for (var i = 0; i < arr.length; ++i) this.pushBack(arr[i]);
+        }
+        return this._length;
+      };
+      /**
+       * @description Remove all elements after the specified position (excluding the specified position).
+       * @param pos - The previous position of the first removed element.
+       * @returns The size of the container after cutting.
+       * @example
+       * deque.cut(1); // Then deque's size will be 2. deque -> [0, 1]
+       */
+      Deque.prototype.cut = function (pos) {
+        if (pos < 0) {
+          this.clear();
+          return 0;
+        }
+        var _a = this._getElementIndex(pos),
+          curNodeBucketIndex = _a.curNodeBucketIndex,
+          curNodePointerIndex = _a.curNodePointerIndex;
+        this._last = curNodeBucketIndex;
+        this._curLast = curNodePointerIndex;
+        this._length = pos + 1;
+        return this._length;
+      };
+      Deque.prototype.eraseElementByPos = function (pos) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        if (pos === 0) this.popFront();else if (pos === this._length - 1) this.popBack();else {
+          var arr = [];
+          for (var i = pos + 1; i < this._length; ++i) {
+            arr.push(this.getElementByPos(i));
+          }
+          this.cut(pos);
+          this.popBack();
+          var self_1 = this;
+          arr.forEach(function (el) {
+            self_1.pushBack(el);
+          });
+        }
+        return this._length;
+      };
+      Deque.prototype.eraseElementByValue = function (value) {
+        if (this._length === 0) return 0;
+        var arr = [];
+        for (var i = 0; i < this._length; ++i) {
+          var element = this.getElementByPos(i);
+          if (element !== value) arr.push(element);
+        }
+        var _length = arr.length;
+        for (var i = 0; i < _length; ++i) this.setElementByPos(i, arr[i]);
+        return this.cut(_length - 1);
+      };
+      Deque.prototype.eraseElementByIterator = function (iter) {
+        var _node = iter._node;
+        this.eraseElementByPos(_node);
+        iter = iter.next();
+        return iter;
+      };
+      Deque.prototype.find = function (element) {
+        for (var i = 0; i < this._length; ++i) {
+          if (this.getElementByPos(i) === element) {
+            return new DequeIterator(i, this);
+          }
+        }
+        return this.end();
+      };
+      Deque.prototype.reverse = function () {
+        var l = 0;
+        var r = this._length - 1;
+        while (l < r) {
+          var tmp = this.getElementByPos(l);
+          this.setElementByPos(l, this.getElementByPos(r));
+          this.setElementByPos(r, tmp);
+          l += 1;
+          r -= 1;
+        }
+      };
+      Deque.prototype.unique = function () {
+        if (this._length <= 1) {
+          return this._length;
+        }
+        var index = 1;
+        var pre = this.getElementByPos(0);
+        for (var i = 1; i < this._length; ++i) {
+          var cur = this.getElementByPos(i);
+          if (cur !== pre) {
+            pre = cur;
+            this.setElementByPos(index++, cur);
+          }
+        }
+        while (this._length > index) this.popBack();
+        return this._length;
+      };
+      Deque.prototype.sort = function (cmp) {
+        var arr = [];
+        for (var i = 0; i < this._length; ++i) {
+          arr.push(this.getElementByPos(i));
+        }
+        arr.sort(cmp);
+        for (var i = 0; i < this._length; ++i) this.setElementByPos(i, arr[i]);
+      };
+      /**
+       * @description Remove as much useless space as possible.
+       */
+      Deque.prototype.shrinkToFit = function () {
+        if (this._length === 0) return;
+        var arr = [];
+        this.forEach(function (el) {
+          arr.push(el);
+        });
+        this._bucketNum = Math.max(Math.ceil(this._length / this._bucketSize), 1);
+        this._length = this._first = this._last = this._curFirst = this._curLast = 0;
+        this._map = [];
+        for (var i = 0; i < this._bucketNum; ++i) {
+          this._map.push(new Array(this._bucketSize));
+        }
+        for (var i = 0; i < arr.length; ++i) this.pushBack(arr[i]);
+      };
+      Deque.prototype.forEach = function (callback) {
+        for (var i = 0; i < this._length; ++i) {
+          callback(this.getElementByPos(i), i, this);
+        }
+      };
+      Deque.prototype[Symbol.iterator] = function () {
+        return function () {
+          var i;
+          return __generator(this, function (_a) {
+            switch (_a.label) {
+              case 0:
+                i = 0;
+                _a.label = 1;
+              case 1:
+                if (!(i < this._length)) return [3 /*break*/, 4];
+                return [4 /*yield*/, this.getElementByPos(i)];
+              case 2:
+                _a.sent();
+                _a.label = 3;
+              case 3:
+                ++i;
+                return [3 /*break*/, 1];
+              case 4:
+                return [2 /*return*/];
+            }
+          });
+        }.bind(this)();
+      };
+      return Deque;
+    }(SequentialContainer);
+
+    var TreeNode = /** @class */function () {
+      function TreeNode(key, value) {
+        this._color = 1 /* TreeNodeColor.RED */;
+        this._key = undefined;
+        this._value = undefined;
+        this._left = undefined;
+        this._right = undefined;
+        this._parent = undefined;
+        this._key = key;
+        this._value = value;
+      }
+      /**
+       * @description Get the pre node.
+       * @returns TreeNode about the pre node.
+       */
+      TreeNode.prototype._pre = function () {
+        var preNode = this;
+        if (preNode._color === 1 /* TreeNodeColor.RED */ && preNode._parent._parent === preNode) {
+          preNode = preNode._right;
+        } else if (preNode._left) {
+          preNode = preNode._left;
+          while (preNode._right) {
+            preNode = preNode._right;
+          }
+        } else {
+          var pre = preNode._parent;
+          while (pre._left === preNode) {
+            preNode = pre;
+            pre = preNode._parent;
+          }
+          preNode = pre;
+        }
+        return preNode;
+      };
+      /**
+       * @description Get the next node.
+       * @returns TreeNode about the next node.
+       */
+      TreeNode.prototype._next = function () {
+        var nextNode = this;
+        if (nextNode._right) {
+          nextNode = nextNode._right;
+          while (nextNode._left) {
+            nextNode = nextNode._left;
+          }
+          return nextNode;
+        } else {
+          var pre = nextNode._parent;
+          while (pre._right === nextNode) {
+            nextNode = pre;
+            pre = nextNode._parent;
+          }
+          if (nextNode._right !== pre) {
+            return pre;
+          } else return nextNode;
+        }
+      };
+      /**
+       * @description Rotate left.
+       * @returns TreeNode about moved to original position after rotation.
+       */
+      TreeNode.prototype._rotateLeft = function () {
+        var PP = this._parent;
+        var V = this._right;
+        var R = V._left;
+        if (PP._parent === this) PP._parent = V;else if (PP._left === this) PP._left = V;else PP._right = V;
+        V._parent = PP;
+        V._left = this;
+        this._parent = V;
+        this._right = R;
+        if (R) R._parent = this;
+        return V;
+      };
+      /**
+       * @description Rotate right.
+       * @returns TreeNode about moved to original position after rotation.
+       */
+      TreeNode.prototype._rotateRight = function () {
+        var PP = this._parent;
+        var F = this._left;
+        var K = F._right;
+        if (PP._parent === this) PP._parent = F;else if (PP._left === this) PP._left = F;else PP._right = F;
+        F._parent = PP;
+        F._right = this;
+        this._parent = F;
+        this._left = K;
+        if (K) K._parent = this;
+        return F;
+      };
+      return TreeNode;
+    }();
+    var TreeNodeEnableIndex = /** @class */function (_super) {
+      __extends(TreeNodeEnableIndex, _super);
+      function TreeNodeEnableIndex() {
+        var _this = _super !== null && _super.apply(this, arguments) || this;
+        _this._subTreeSize = 1;
+        return _this;
+      }
+      /**
+       * @description Rotate left and do recount.
+       * @returns TreeNode about moved to original position after rotation.
+       */
+      TreeNodeEnableIndex.prototype._rotateLeft = function () {
+        var parent = _super.prototype._rotateLeft.call(this);
+        this._recount();
+        parent._recount();
+        return parent;
+      };
+      /**
+       * @description Rotate right and do recount.
+       * @returns TreeNode about moved to original position after rotation.
+       */
+      TreeNodeEnableIndex.prototype._rotateRight = function () {
+        var parent = _super.prototype._rotateRight.call(this);
+        this._recount();
+        parent._recount();
+        return parent;
+      };
+      TreeNodeEnableIndex.prototype._recount = function () {
+        this._subTreeSize = 1;
+        if (this._left) {
+          this._subTreeSize += this._left._subTreeSize;
+        }
+        if (this._right) {
+          this._subTreeSize += this._right._subTreeSize;
+        }
+      };
+      return TreeNodeEnableIndex;
+    }(TreeNode);
+
+    var TreeContainer = /** @class */function (_super) {
+      __extends(TreeContainer, _super);
+      /**
+       * @internal
+       */
+      function TreeContainer(cmp, enableIndex) {
+        if (cmp === void 0) {
+          cmp = function (x, y) {
+            if (x < y) return -1;
+            if (x > y) return 1;
+            return 0;
+          };
+        }
+        if (enableIndex === void 0) {
+          enableIndex = false;
+        }
+        var _this = _super.call(this) || this;
+        /**
+         * @internal
+         */
+        _this._root = undefined;
+        _this._cmp = cmp;
+        if (enableIndex) {
+          _this._TreeNodeClass = TreeNodeEnableIndex;
+          _this._set = function (key, value, hint) {
+            var curNode = this._preSet(key, value, hint);
+            if (curNode) {
+              var p = curNode._parent;
+              while (p !== this._header) {
+                p._subTreeSize += 1;
+                p = p._parent;
+              }
+              var nodeList = this._insertNodeSelfBalance(curNode);
+              if (nodeList) {
+                var _a = nodeList,
+                  parentNode = _a.parentNode,
+                  grandParent = _a.grandParent,
+                  curNode_1 = _a.curNode;
+                parentNode._recount();
+                grandParent._recount();
+                curNode_1._recount();
+              }
+            }
+            return this._length;
+          };
+          _this._eraseNode = function (curNode) {
+            var p = this._preEraseNode(curNode);
+            while (p !== this._header) {
+              p._subTreeSize -= 1;
+              p = p._parent;
+            }
+          };
+        } else {
+          _this._TreeNodeClass = TreeNode;
+          _this._set = function (key, value, hint) {
+            var curNode = this._preSet(key, value, hint);
+            if (curNode) this._insertNodeSelfBalance(curNode);
+            return this._length;
+          };
+          _this._eraseNode = _this._preEraseNode;
+        }
+        _this._header = new _this._TreeNodeClass();
+        return _this;
+      }
+      /**
+       * @internal
+       */
+      TreeContainer.prototype._lowerBound = function (curNode, key) {
+        var resNode = this._header;
+        while (curNode) {
+          var cmpResult = this._cmp(curNode._key, key);
+          if (cmpResult < 0) {
+            curNode = curNode._right;
+          } else if (cmpResult > 0) {
+            resNode = curNode;
+            curNode = curNode._left;
+          } else return curNode;
+        }
+        return resNode;
+      };
+      /**
+       * @internal
+       */
+      TreeContainer.prototype._upperBound = function (curNode, key) {
+        var resNode = this._header;
+        while (curNode) {
+          var cmpResult = this._cmp(curNode._key, key);
+          if (cmpResult <= 0) {
+            curNode = curNode._right;
+          } else {
+            resNode = curNode;
+            curNode = curNode._left;
+          }
+        }
+        return resNode;
+      };
+      /**
+       * @internal
+       */
+      TreeContainer.prototype._reverseLowerBound = function (curNode, key) {
+        var resNode = this._header;
+        while (curNode) {
+          var cmpResult = this._cmp(curNode._key, key);
+          if (cmpResult < 0) {
+            resNode = curNode;
+            curNode = curNode._right;
+          } else if (cmpResult > 0) {
+            curNode = curNode._left;
+          } else return curNode;
+        }
+        return resNode;
+      };
+      /**
+       * @internal
+       */
+      TreeContainer.prototype._reverseUpperBound = function (curNode, key) {
+        var resNode = this._header;
+        while (curNode) {
+          var cmpResult = this._cmp(curNode._key, key);
+          if (cmpResult < 0) {
+            resNode = curNode;
+            curNode = curNode._right;
+          } else {
+            curNode = curNode._left;
+          }
+        }
+        return resNode;
+      };
+      /**
+       * @internal
+       */
+      TreeContainer.prototype._eraseNodeSelfBalance = function (curNode) {
+        while (true) {
+          var parentNode = curNode._parent;
+          if (parentNode === this._header) return;
+          if (curNode._color === 1 /* TreeNodeColor.RED */) {
+            curNode._color = 0 /* TreeNodeColor.BLACK */;
+            return;
+          }
+          if (curNode === parentNode._left) {
+            var brother = parentNode._right;
+            if (brother._color === 1 /* TreeNodeColor.RED */) {
+              brother._color = 0 /* TreeNodeColor.BLACK */;
+              parentNode._color = 1 /* TreeNodeColor.RED */;
+              if (parentNode === this._root) {
+                this._root = parentNode._rotateLeft();
+              } else parentNode._rotateLeft();
+            } else {
+              if (brother._right && brother._right._color === 1 /* TreeNodeColor.RED */) {
+                brother._color = parentNode._color;
+                parentNode._color = 0 /* TreeNodeColor.BLACK */;
+                brother._right._color = 0 /* TreeNodeColor.BLACK */;
+                if (parentNode === this._root) {
+                  this._root = parentNode._rotateLeft();
+                } else parentNode._rotateLeft();
+                return;
+              } else if (brother._left && brother._left._color === 1 /* TreeNodeColor.RED */) {
+                brother._color = 1 /* TreeNodeColor.RED */;
+                brother._left._color = 0 /* TreeNodeColor.BLACK */;
+                brother._rotateRight();
+              } else {
+                brother._color = 1 /* TreeNodeColor.RED */;
+                curNode = parentNode;
+              }
+            }
+          } else {
+            var brother = parentNode._left;
+            if (brother._color === 1 /* TreeNodeColor.RED */) {
+              brother._color = 0 /* TreeNodeColor.BLACK */;
+              parentNode._color = 1 /* TreeNodeColor.RED */;
+              if (parentNode === this._root) {
+                this._root = parentNode._rotateRight();
+              } else parentNode._rotateRight();
+            } else {
+              if (brother._left && brother._left._color === 1 /* TreeNodeColor.RED */) {
+                brother._color = parentNode._color;
+                parentNode._color = 0 /* TreeNodeColor.BLACK */;
+                brother._left._color = 0 /* TreeNodeColor.BLACK */;
+                if (parentNode === this._root) {
+                  this._root = parentNode._rotateRight();
+                } else parentNode._rotateRight();
+                return;
+              } else if (brother._right && brother._right._color === 1 /* TreeNodeColor.RED */) {
+                brother._color = 1 /* TreeNodeColor.RED */;
+                brother._right._color = 0 /* TreeNodeColor.BLACK */;
+                brother._rotateLeft();
+              } else {
+                brother._color = 1 /* TreeNodeColor.RED */;
+                curNode = parentNode;
+              }
+            }
+          }
+        }
+      };
+      /**
+       * @internal
+       */
+      TreeContainer.prototype._preEraseNode = function (curNode) {
+        var _a, _b;
+        if (this._length === 1) {
+          this.clear();
+          return this._header;
+        }
+        var swapNode = curNode;
+        while (swapNode._left || swapNode._right) {
+          if (swapNode._right) {
+            swapNode = swapNode._right;
+            while (swapNode._left) swapNode = swapNode._left;
+          } else {
+            swapNode = swapNode._left;
+          }
+          _a = __read([swapNode._key, curNode._key], 2), curNode._key = _a[0], swapNode._key = _a[1];
+          _b = __read([swapNode._value, curNode._value], 2), curNode._value = _b[0], swapNode._value = _b[1];
+          curNode = swapNode;
+        }
+        if (this._header._left === swapNode) {
+          this._header._left = swapNode._parent;
+        } else if (this._header._right === swapNode) {
+          this._header._right = swapNode._parent;
+        }
+        this._eraseNodeSelfBalance(swapNode);
+        var _parent = swapNode._parent;
+        if (swapNode === _parent._left) {
+          _parent._left = undefined;
+        } else _parent._right = undefined;
+        this._length -= 1;
+        this._root._color = 0 /* TreeNodeColor.BLACK */;
+        return _parent;
+      };
+      /**
+       * @internal
+       */
+      TreeContainer.prototype._inOrderTraversal = function (curNode, callback) {
+        if (curNode === undefined) return false;
+        var ifReturn = this._inOrderTraversal(curNode._left, callback);
+        if (ifReturn) return true;
+        if (callback(curNode)) return true;
+        return this._inOrderTraversal(curNode._right, callback);
+      };
+      /**
+       * @internal
+       */
+      TreeContainer.prototype._insertNodeSelfBalance = function (curNode) {
+        while (true) {
+          var parentNode = curNode._parent;
+          if (parentNode._color === 0 /* TreeNodeColor.BLACK */) return;
+          var grandParent = parentNode._parent;
+          if (parentNode === grandParent._left) {
+            var uncle = grandParent._right;
+            if (uncle && uncle._color === 1 /* TreeNodeColor.RED */) {
+              uncle._color = parentNode._color = 0 /* TreeNodeColor.BLACK */;
+              if (grandParent === this._root) return;
+              grandParent._color = 1 /* TreeNodeColor.RED */;
+              curNode = grandParent;
+              continue;
+            } else if (curNode === parentNode._right) {
+              curNode._color = 0 /* TreeNodeColor.BLACK */;
+              if (curNode._left) curNode._left._parent = parentNode;
+              if (curNode._right) curNode._right._parent = grandParent;
+              parentNode._right = curNode._left;
+              grandParent._left = curNode._right;
+              curNode._left = parentNode;
+              curNode._right = grandParent;
+              if (grandParent === this._root) {
+                this._root = curNode;
+                this._header._parent = curNode;
+              } else {
+                var GP = grandParent._parent;
+                if (GP._left === grandParent) {
+                  GP._left = curNode;
+                } else GP._right = curNode;
+              }
+              curNode._parent = grandParent._parent;
+              parentNode._parent = curNode;
+              grandParent._parent = curNode;
+              grandParent._color = 1 /* TreeNodeColor.RED */;
+              return {
+                parentNode: parentNode,
+                grandParent: grandParent,
+                curNode: curNode
+              };
+            } else {
+              parentNode._color = 0 /* TreeNodeColor.BLACK */;
+              if (grandParent === this._root) {
+                this._root = grandParent._rotateRight();
+              } else grandParent._rotateRight();
+              grandParent._color = 1 /* TreeNodeColor.RED */;
+            }
+          } else {
+            var uncle = grandParent._left;
+            if (uncle && uncle._color === 1 /* TreeNodeColor.RED */) {
+              uncle._color = parentNode._color = 0 /* TreeNodeColor.BLACK */;
+              if (grandParent === this._root) return;
+              grandParent._color = 1 /* TreeNodeColor.RED */;
+              curNode = grandParent;
+              continue;
+            } else if (curNode === parentNode._left) {
+              curNode._color = 0 /* TreeNodeColor.BLACK */;
+              if (curNode._left) curNode._left._parent = grandParent;
+              if (curNode._right) curNode._right._parent = parentNode;
+              grandParent._right = curNode._left;
+              parentNode._left = curNode._right;
+              curNode._left = grandParent;
+              curNode._right = parentNode;
+              if (grandParent === this._root) {
+                this._root = curNode;
+                this._header._parent = curNode;
+              } else {
+                var GP = grandParent._parent;
+                if (GP._left === grandParent) {
+                  GP._left = curNode;
+                } else GP._right = curNode;
+              }
+              curNode._parent = grandParent._parent;
+              parentNode._parent = curNode;
+              grandParent._parent = curNode;
+              grandParent._color = 1 /* TreeNodeColor.RED */;
+              return {
+                parentNode: parentNode,
+                grandParent: grandParent,
+                curNode: curNode
+              };
+            } else {
+              parentNode._color = 0 /* TreeNodeColor.BLACK */;
+              if (grandParent === this._root) {
+                this._root = grandParent._rotateLeft();
+              } else grandParent._rotateLeft();
+              grandParent._color = 1 /* TreeNodeColor.RED */;
+            }
+          }
+
+          return;
+        }
+      };
+      /**
+       * @internal
+       */
+      TreeContainer.prototype._preSet = function (key, value, hint) {
+        if (this._root === undefined) {
+          this._length += 1;
+          this._root = new this._TreeNodeClass(key, value);
+          this._root._color = 0 /* TreeNodeColor.BLACK */;
+          this._root._parent = this._header;
+          this._header._parent = this._root;
+          this._header._left = this._root;
+          this._header._right = this._root;
+          return;
+        }
+        var curNode;
+        var minNode = this._header._left;
+        var compareToMin = this._cmp(minNode._key, key);
+        if (compareToMin === 0) {
+          minNode._value = value;
+          return;
+        } else if (compareToMin > 0) {
+          minNode._left = new this._TreeNodeClass(key, value);
+          minNode._left._parent = minNode;
+          curNode = minNode._left;
+          this._header._left = curNode;
+        } else {
+          var maxNode = this._header._right;
+          var compareToMax = this._cmp(maxNode._key, key);
+          if (compareToMax === 0) {
+            maxNode._value = value;
+            return;
+          } else if (compareToMax < 0) {
+            maxNode._right = new this._TreeNodeClass(key, value);
+            maxNode._right._parent = maxNode;
+            curNode = maxNode._right;
+            this._header._right = curNode;
+          } else {
+            if (hint !== undefined) {
+              var iterNode = hint._node;
+              if (iterNode !== this._header) {
+                var iterCmpRes = this._cmp(iterNode._key, key);
+                if (iterCmpRes === 0) {
+                  iterNode._value = value;
+                  return;
+                } else /* istanbul ignore else */if (iterCmpRes > 0) {
+                    var preNode = iterNode._pre();
+                    var preCmpRes = this._cmp(preNode._key, key);
+                    if (preCmpRes === 0) {
+                      preNode._value = value;
+                      return;
+                    } else if (preCmpRes < 0) {
+                      curNode = new this._TreeNodeClass(key, value);
+                      if (preNode._right === undefined) {
+                        preNode._right = curNode;
+                        curNode._parent = preNode;
+                      } else {
+                        iterNode._left = curNode;
+                        curNode._parent = iterNode;
+                      }
+                    }
+                  }
+              }
+            }
+            if (curNode === undefined) {
+              curNode = this._root;
+              while (true) {
+                var cmpResult = this._cmp(curNode._key, key);
+                if (cmpResult > 0) {
+                  if (curNode._left === undefined) {
+                    curNode._left = new this._TreeNodeClass(key, value);
+                    curNode._left._parent = curNode;
+                    curNode = curNode._left;
+                    break;
+                  }
+                  curNode = curNode._left;
+                } else if (cmpResult < 0) {
+                  if (curNode._right === undefined) {
+                    curNode._right = new this._TreeNodeClass(key, value);
+                    curNode._right._parent = curNode;
+                    curNode = curNode._right;
+                    break;
+                  }
+                  curNode = curNode._right;
+                } else {
+                  curNode._value = value;
+                  return;
+                }
+              }
+            }
+          }
+        }
+        this._length += 1;
+        return curNode;
+      };
+      /**
+       * @internal
+       */
+      TreeContainer.prototype._findElementNode = function (curNode, key) {
+        while (curNode) {
+          var cmpResult = this._cmp(curNode._key, key);
+          if (cmpResult < 0) {
+            curNode = curNode._right;
+          } else if (cmpResult > 0) {
+            curNode = curNode._left;
+          } else return curNode;
+        }
+        return curNode || this._header;
+      };
+      TreeContainer.prototype.clear = function () {
+        this._length = 0;
+        this._root = undefined;
+        this._header._parent = undefined;
+        this._header._left = this._header._right = undefined;
+      };
+      /**
+       * @description Update node's key by iterator.
+       * @param iter - The iterator you want to change.
+       * @param key - The key you want to update.
+       * @returns Whether the modification is successful.
+       * @example
+       * const st = new orderedSet([1, 2, 5]);
+       * const iter = st.find(2);
+       * st.updateKeyByIterator(iter, 3); // then st will become [1, 3, 5]
+       */
+      TreeContainer.prototype.updateKeyByIterator = function (iter, key) {
+        var node = iter._node;
+        if (node === this._header) {
+          throwIteratorAccessError();
+        }
+        if (this._length === 1) {
+          node._key = key;
+          return true;
+        }
+        if (node === this._header._left) {
+          if (this._cmp(node._next()._key, key) > 0) {
+            node._key = key;
+            return true;
+          }
+          return false;
+        }
+        if (node === this._header._right) {
+          if (this._cmp(node._pre()._key, key) < 0) {
+            node._key = key;
+            return true;
+          }
+          return false;
+        }
+        var preKey = node._pre()._key;
+        if (this._cmp(preKey, key) >= 0) return false;
+        var nextKey = node._next()._key;
+        if (this._cmp(nextKey, key) <= 0) return false;
+        node._key = key;
+        return true;
+      };
+      TreeContainer.prototype.eraseElementByPos = function (pos) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        var index = 0;
+        var self = this;
+        this._inOrderTraversal(this._root, function (curNode) {
+          if (pos === index) {
+            self._eraseNode(curNode);
+            return true;
+          }
+          index += 1;
+          return false;
+        });
+        return this._length;
+      };
+      /**
+       * @description Remove the element of the specified key.
+       * @param key - The key you want to remove.
+       * @returns Whether erase successfully.
+       */
+      TreeContainer.prototype.eraseElementByKey = function (key) {
+        if (this._length === 0) return false;
+        var curNode = this._findElementNode(this._root, key);
+        if (curNode === this._header) return false;
+        this._eraseNode(curNode);
+        return true;
+      };
+      TreeContainer.prototype.eraseElementByIterator = function (iter) {
+        var node = iter._node;
+        if (node === this._header) {
+          throwIteratorAccessError();
+        }
+        var hasNoRight = node._right === undefined;
+        var isNormal = iter.iteratorType === 0 /* IteratorType.NORMAL */;
+        // For the normal iterator, the `next` node will be swapped to `this` node when has right.
+        if (isNormal) {
+          // So we should move it to next when it's right is null.
+          if (hasNoRight) iter.next();
+        } else {
+          // For the reverse iterator, only when it doesn't have right and has left the `next` node will be swapped.
+          // So when it has right, or it is a leaf node we should move it to `next`.
+          if (!hasNoRight || node._left === undefined) iter.next();
+        }
+        this._eraseNode(node);
+        return iter;
+      };
+      TreeContainer.prototype.forEach = function (callback) {
+        var e_1, _a;
+        var index = 0;
+        try {
+          for (var _b = __values(this), _c = _b.next(); !_c.done; _c = _b.next()) {
+            var element = _c.value;
+            callback(element, index++, this);
+          }
+        } catch (e_1_1) {
+          e_1 = {
+            error: e_1_1
+          };
+        } finally {
+          try {
+            if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
+          } finally {
+            if (e_1) throw e_1.error;
+          }
+        }
+      };
+      TreeContainer.prototype.getElementByPos = function (pos) {
+        var e_2, _a;
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        var res;
+        var index = 0;
+        try {
+          for (var _b = __values(this), _c = _b.next(); !_c.done; _c = _b.next()) {
+            var element = _c.value;
+            if (index === pos) {
+              res = element;
+              break;
+            }
+            index += 1;
+          }
+        } catch (e_2_1) {
+          e_2 = {
+            error: e_2_1
+          };
+        } finally {
+          try {
+            if (_c && !_c.done && (_a = _b.return)) _a.call(_b);
+          } finally {
+            if (e_2) throw e_2.error;
+          }
+        }
+        return res;
+      };
+      /**
+       * @description Get the height of the tree.
+       * @returns Number about the height of the RB-tree.
+       */
+      TreeContainer.prototype.getHeight = function () {
+        if (this._length === 0) return 0;
+        var traversal = function (curNode) {
+          if (!curNode) return 0;
+          return Math.max(traversal(curNode._left), traversal(curNode._right)) + 1;
+        };
+        return traversal(this._root);
+      };
+      return TreeContainer;
+    }(Container);
+
+    var TreeIterator = /** @class */function (_super) {
+      __extends(TreeIterator, _super);
+      /**
+       * @internal
+       */
+      function TreeIterator(node, header, iteratorType) {
+        var _this = _super.call(this, iteratorType) || this;
+        _this._node = node;
+        _this._header = header;
+        if (_this.iteratorType === 0 /* IteratorType.NORMAL */) {
+          _this.pre = function () {
+            if (this._node === this._header._left) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._pre();
+            return this;
+          };
+          _this.next = function () {
+            if (this._node === this._header) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._next();
+            return this;
+          };
+        } else {
+          _this.pre = function () {
+            if (this._node === this._header._right) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._next();
+            return this;
+          };
+          _this.next = function () {
+            if (this._node === this._header) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._pre();
+            return this;
+          };
+        }
+        return _this;
+      }
+      Object.defineProperty(TreeIterator.prototype, "index", {
+        /**
+         * @description Get the sequential index of the iterator in the tree container.<br/>
+         *              <strong>Note:</strong>
+         *              This function only takes effect when the specified tree container `enableIndex = true`.
+         * @returns The index subscript of the node in the tree.
+         * @example
+         * const st = new OrderedSet([1, 2, 3], true);
+         * console.log(st.begin().next().index);  // 1
+         */
+        get: function () {
+          var _node = this._node;
+          var root = this._header._parent;
+          if (_node === this._header) {
+            if (root) {
+              return root._subTreeSize - 1;
+            }
+            return 0;
+          }
+          var index = 0;
+          if (_node._left) {
+            index += _node._left._subTreeSize;
+          }
+          while (_node !== root) {
+            var _parent = _node._parent;
+            if (_node === _parent._right) {
+              index += 1;
+              if (_parent._left) {
+                index += _parent._left._subTreeSize;
+              }
+            }
+            _node = _parent;
+          }
+          return index;
+        },
+        enumerable: false,
+        configurable: true
+      });
+      return TreeIterator;
+    }(ContainerIterator);
+
+    var OrderedSetIterator = /** @class */function (_super) {
+      __extends(OrderedSetIterator, _super);
+      function OrderedSetIterator(node, header, container, iteratorType) {
+        var _this = _super.call(this, node, header, iteratorType) || this;
+        _this.container = container;
+        return _this;
+      }
+      Object.defineProperty(OrderedSetIterator.prototype, "pointer", {
+        get: function () {
+          if (this._node === this._header) {
+            throwIteratorAccessError();
+          }
+          return this._node._key;
+        },
+        enumerable: false,
+        configurable: true
+      });
+      OrderedSetIterator.prototype.copy = function () {
+        return new OrderedSetIterator(this._node, this._header, this.container, this.iteratorType);
+      };
+      return OrderedSetIterator;
+    }(TreeIterator);
+    var OrderedSet = /** @class */function (_super) {
+      __extends(OrderedSet, _super);
+      /**
+       * @param container - The initialization container.
+       * @param cmp - The compare function.
+       * @param enableIndex - Whether to enable iterator indexing function.
+       * @example
+       * new OrderedSet();
+       * new OrderedSet([0, 1, 2]);
+       * new OrderedSet([0, 1, 2], (x, y) => x - y);
+       * new OrderedSet([0, 1, 2], (x, y) => x - y, true);
+       */
+      function OrderedSet(container, cmp, enableIndex) {
+        if (container === void 0) {
+          container = [];
+        }
+        var _this = _super.call(this, cmp, enableIndex) || this;
+        var self = _this;
+        container.forEach(function (el) {
+          self.insert(el);
+        });
+        return _this;
+      }
+      /**
+       * @internal
+       */
+      OrderedSet.prototype._iterationFunc = function (curNode) {
+        return __generator(this, function (_a) {
+          switch (_a.label) {
+            case 0:
+              if (curNode === undefined) return [2 /*return*/];
+              return [5 /*yield**/, __values(this._iterationFunc(curNode._left))];
+            case 1:
+              _a.sent();
+              return [4 /*yield*/, curNode._key];
+            case 2:
+              _a.sent();
+              return [5 /*yield**/, __values(this._iterationFunc(curNode._right))];
+            case 3:
+              _a.sent();
+              return [2 /*return*/];
+          }
+        });
+      };
+
+      OrderedSet.prototype.begin = function () {
+        return new OrderedSetIterator(this._header._left || this._header, this._header, this);
+      };
+      OrderedSet.prototype.end = function () {
+        return new OrderedSetIterator(this._header, this._header, this);
+      };
+      OrderedSet.prototype.rBegin = function () {
+        return new OrderedSetIterator(this._header._right || this._header, this._header, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      OrderedSet.prototype.rEnd = function () {
+        return new OrderedSetIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      OrderedSet.prototype.front = function () {
+        return this._header._left ? this._header._left._key : undefined;
+      };
+      OrderedSet.prototype.back = function () {
+        return this._header._right ? this._header._right._key : undefined;
+      };
+      /**
+       * @description Insert element to set.
+       * @param key - The key want to insert.
+       * @param hint - You can give an iterator hint to improve insertion efficiency.
+       * @return The size of container after setting.
+       * @example
+       * const st = new OrderedSet([2, 4, 5]);
+       * const iter = st.begin();
+       * st.insert(1);
+       * st.insert(3, iter);  // give a hint will be faster.
+       */
+      OrderedSet.prototype.insert = function (key, hint) {
+        return this._set(key, undefined, hint);
+      };
+      OrderedSet.prototype.find = function (element) {
+        var resNode = this._findElementNode(this._root, element);
+        return new OrderedSetIterator(resNode, this._header, this);
+      };
+      OrderedSet.prototype.lowerBound = function (key) {
+        var resNode = this._lowerBound(this._root, key);
+        return new OrderedSetIterator(resNode, this._header, this);
+      };
+      OrderedSet.prototype.upperBound = function (key) {
+        var resNode = this._upperBound(this._root, key);
+        return new OrderedSetIterator(resNode, this._header, this);
+      };
+      OrderedSet.prototype.reverseLowerBound = function (key) {
+        var resNode = this._reverseLowerBound(this._root, key);
+        return new OrderedSetIterator(resNode, this._header, this);
+      };
+      OrderedSet.prototype.reverseUpperBound = function (key) {
+        var resNode = this._reverseUpperBound(this._root, key);
+        return new OrderedSetIterator(resNode, this._header, this);
+      };
+      OrderedSet.prototype.union = function (other) {
+        var self = this;
+        other.forEach(function (el) {
+          self.insert(el);
+        });
+        return this._length;
+      };
+      OrderedSet.prototype[Symbol.iterator] = function () {
+        return this._iterationFunc(this._root);
+      };
+      return OrderedSet;
+    }(TreeContainer);
+
+    var OrderedMapIterator = /** @class */function (_super) {
+      __extends(OrderedMapIterator, _super);
+      function OrderedMapIterator(node, header, container, iteratorType) {
+        var _this = _super.call(this, node, header, iteratorType) || this;
+        _this.container = container;
+        return _this;
+      }
+      Object.defineProperty(OrderedMapIterator.prototype, "pointer", {
+        get: function () {
+          if (this._node === this._header) {
+            throwIteratorAccessError();
+          }
+          var self = this;
+          return new Proxy([], {
+            get: function (_, props) {
+              if (props === '0') return self._node._key;else if (props === '1') return self._node._value;
+            },
+            set: function (_, props, newValue) {
+              if (props !== '1') {
+                throw new TypeError('props must be 1');
+              }
+              self._node._value = newValue;
+              return true;
+            }
+          });
+        },
+        enumerable: false,
+        configurable: true
+      });
+      OrderedMapIterator.prototype.copy = function () {
+        return new OrderedMapIterator(this._node, this._header, this.container, this.iteratorType);
+      };
+      return OrderedMapIterator;
+    }(TreeIterator);
+    var OrderedMap = /** @class */function (_super) {
+      __extends(OrderedMap, _super);
+      /**
+       * @param container - The initialization container.
+       * @param cmp - The compare function.
+       * @param enableIndex - Whether to enable iterator indexing function.
+       * @example
+       * new OrderedMap();
+       * new OrderedMap([[0, 1], [2, 1]]);
+       * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y);
+       * new OrderedMap([[0, 1], [2, 1]], (x, y) => x - y, true);
+       */
+      function OrderedMap(container, cmp, enableIndex) {
+        if (container === void 0) {
+          container = [];
+        }
+        var _this = _super.call(this, cmp, enableIndex) || this;
+        var self = _this;
+        container.forEach(function (el) {
+          self.setElement(el[0], el[1]);
+        });
+        return _this;
+      }
+      /**
+       * @internal
+       */
+      OrderedMap.prototype._iterationFunc = function (curNode) {
+        return __generator(this, function (_a) {
+          switch (_a.label) {
+            case 0:
+              if (curNode === undefined) return [2 /*return*/];
+              return [5 /*yield**/, __values(this._iterationFunc(curNode._left))];
+            case 1:
+              _a.sent();
+              return [4 /*yield*/, [curNode._key, curNode._value]];
+            case 2:
+              _a.sent();
+              return [5 /*yield**/, __values(this._iterationFunc(curNode._right))];
+            case 3:
+              _a.sent();
+              return [2 /*return*/];
+          }
+        });
+      };
+
+      OrderedMap.prototype.begin = function () {
+        return new OrderedMapIterator(this._header._left || this._header, this._header, this);
+      };
+      OrderedMap.prototype.end = function () {
+        return new OrderedMapIterator(this._header, this._header, this);
+      };
+      OrderedMap.prototype.rBegin = function () {
+        return new OrderedMapIterator(this._header._right || this._header, this._header, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      OrderedMap.prototype.rEnd = function () {
+        return new OrderedMapIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      OrderedMap.prototype.front = function () {
+        if (this._length === 0) return;
+        var minNode = this._header._left;
+        return [minNode._key, minNode._value];
+      };
+      OrderedMap.prototype.back = function () {
+        if (this._length === 0) return;
+        var maxNode = this._header._right;
+        return [maxNode._key, maxNode._value];
+      };
+      OrderedMap.prototype.lowerBound = function (key) {
+        var resNode = this._lowerBound(this._root, key);
+        return new OrderedMapIterator(resNode, this._header, this);
+      };
+      OrderedMap.prototype.upperBound = function (key) {
+        var resNode = this._upperBound(this._root, key);
+        return new OrderedMapIterator(resNode, this._header, this);
+      };
+      OrderedMap.prototype.reverseLowerBound = function (key) {
+        var resNode = this._reverseLowerBound(this._root, key);
+        return new OrderedMapIterator(resNode, this._header, this);
+      };
+      OrderedMap.prototype.reverseUpperBound = function (key) {
+        var resNode = this._reverseUpperBound(this._root, key);
+        return new OrderedMapIterator(resNode, this._header, this);
+      };
+      /**
+       * @description Insert a key-value pair or set value by the given key.
+       * @param key - The key want to insert.
+       * @param value - The value want to set.
+       * @param hint - You can give an iterator hint to improve insertion efficiency.
+       * @return The size of container after setting.
+       * @example
+       * const mp = new OrderedMap([[2, 0], [4, 0], [5, 0]]);
+       * const iter = mp.begin();
+       * mp.setElement(1, 0);
+       * mp.setElement(3, 0, iter);  // give a hint will be faster.
+       */
+      OrderedMap.prototype.setElement = function (key, value, hint) {
+        return this._set(key, value, hint);
+      };
+      OrderedMap.prototype.find = function (key) {
+        var curNode = this._findElementNode(this._root, key);
+        return new OrderedMapIterator(curNode, this._header, this);
+      };
+      /**
+       * @description Get the value of the element of the specified key.
+       * @param key - The specified key you want to get.
+       * @example
+       * const val = container.getElementByKey(1);
+       */
+      OrderedMap.prototype.getElementByKey = function (key) {
+        var curNode = this._findElementNode(this._root, key);
+        return curNode._value;
+      };
+      OrderedMap.prototype.union = function (other) {
+        var self = this;
+        other.forEach(function (el) {
+          self.setElement(el[0], el[1]);
+        });
+        return this._length;
+      };
+      OrderedMap.prototype[Symbol.iterator] = function () {
+        return this._iterationFunc(this._root);
+      };
+      return OrderedMap;
+    }(TreeContainer);
+
+    /**
+     * @description Determine whether the type of key is `object`.
+     * @param key - The key want to check.
+     * @returns Whether the type of key is `object`.
+     * @internal
+     */
+    function checkObject(key) {
+      var t = typeof key;
+      return t === 'object' && key !== null || t === 'function';
+    }
+
+    var HashContainerIterator = /** @class */function (_super) {
+      __extends(HashContainerIterator, _super);
+      /**
+       * @internal
+       */
+      function HashContainerIterator(node, header, iteratorType) {
+        var _this = _super.call(this, iteratorType) || this;
+        _this._node = node;
+        _this._header = header;
+        if (_this.iteratorType === 0 /* IteratorType.NORMAL */) {
+          _this.pre = function () {
+            if (this._node._pre === this._header) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._pre;
+            return this;
+          };
+          _this.next = function () {
+            if (this._node === this._header) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._next;
+            return this;
+          };
+        } else {
+          _this.pre = function () {
+            if (this._node._next === this._header) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._next;
+            return this;
+          };
+          _this.next = function () {
+            if (this._node === this._header) {
+              throwIteratorAccessError();
+            }
+            this._node = this._node._pre;
+            return this;
+          };
+        }
+        return _this;
+      }
+      return HashContainerIterator;
+    }(ContainerIterator);
+    var HashContainer = /** @class */function (_super) {
+      __extends(HashContainer, _super);
+      /**
+       * @internal
+       */
+      function HashContainer() {
+        var _this = _super.call(this) || this;
+        /**
+         * @internal
+         */
+        _this._objMap = [];
+        /**
+         * @internal
+         */
+        _this._originMap = {};
+        /**
+         * @description Unique symbol used to tag object.
+         */
+        _this.HASH_TAG = Symbol('@@HASH_TAG');
+        Object.setPrototypeOf(_this._originMap, null);
+        _this._header = {};
+        _this._header._pre = _this._header._next = _this._head = _this._tail = _this._header;
+        return _this;
+      }
+      /**
+       * @internal
+       */
+      HashContainer.prototype._eraseNode = function (node) {
+        var _pre = node._pre,
+          _next = node._next;
+        _pre._next = _next;
+        _next._pre = _pre;
+        if (node === this._head) {
+          this._head = _next;
+        }
+        if (node === this._tail) {
+          this._tail = _pre;
+        }
+        this._length -= 1;
+      };
+      /**
+       * @internal
+       */
+      HashContainer.prototype._set = function (key, value, isObject) {
+        if (isObject === undefined) isObject = checkObject(key);
+        var newTail;
+        if (isObject) {
+          var index = key[this.HASH_TAG];
+          if (index !== undefined) {
+            this._objMap[index]._value = value;
+            return this._length;
+          }
+          Object.defineProperty(key, this.HASH_TAG, {
+            value: this._objMap.length,
+            configurable: true
+          });
+          newTail = {
+            _key: key,
+            _value: value,
+            _pre: this._tail,
+            _next: this._header
+          };
+          this._objMap.push(newTail);
+        } else {
+          var node = this._originMap[key];
+          if (node) {
+            node._value = value;
+            return this._length;
+          }
+          newTail = {
+            _key: key,
+            _value: value,
+            _pre: this._tail,
+            _next: this._header
+          };
+          this._originMap[key] = newTail;
+        }
+        if (this._length === 0) {
+          this._head = newTail;
+          this._header._next = newTail;
+        } else {
+          this._tail._next = newTail;
+        }
+        this._tail = newTail;
+        this._header._pre = newTail;
+        return ++this._length;
+      };
+      /**
+       * @internal
+       */
+      HashContainer.prototype._findElementNode = function (key, isObject) {
+        if (isObject === undefined) isObject = checkObject(key);
+        if (isObject) {
+          var index = key[this.HASH_TAG];
+          if (index === undefined) return this._header;
+          return this._objMap[index];
+        } else {
+          return this._originMap[key] || this._header;
+        }
+      };
+      HashContainer.prototype.clear = function () {
+        var HASH_TAG = this.HASH_TAG;
+        this._objMap.forEach(function (el) {
+          delete el._key[HASH_TAG];
+        });
+        this._objMap = [];
+        this._originMap = {};
+        Object.setPrototypeOf(this._originMap, null);
+        this._length = 0;
+        this._head = this._tail = this._header._pre = this._header._next = this._header;
+      };
+      /**
+       * @description Remove the element of the specified key.
+       * @param key - The key you want to remove.
+       * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+       *                   If a `undefined` value is passed in, the type will be automatically judged.
+       * @returns Whether erase successfully.
+       */
+      HashContainer.prototype.eraseElementByKey = function (key, isObject) {
+        var node;
+        if (isObject === undefined) isObject = checkObject(key);
+        if (isObject) {
+          var index = key[this.HASH_TAG];
+          if (index === undefined) return false;
+          delete key[this.HASH_TAG];
+          node = this._objMap[index];
+          delete this._objMap[index];
+        } else {
+          node = this._originMap[key];
+          if (node === undefined) return false;
+          delete this._originMap[key];
+        }
+        this._eraseNode(node);
+        return true;
+      };
+      HashContainer.prototype.eraseElementByIterator = function (iter) {
+        var node = iter._node;
+        if (node === this._header) {
+          throwIteratorAccessError();
+        }
+        this._eraseNode(node);
+        return iter.next();
+      };
+      HashContainer.prototype.eraseElementByPos = function (pos) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        var node = this._head;
+        while (pos--) {
+          node = node._next;
+        }
+        this._eraseNode(node);
+        return this._length;
+      };
+      return HashContainer;
+    }(Container);
+
+    var HashSetIterator = /** @class */function (_super) {
+      __extends(HashSetIterator, _super);
+      function HashSetIterator(node, header, container, iteratorType) {
+        var _this = _super.call(this, node, header, iteratorType) || this;
+        _this.container = container;
+        return _this;
+      }
+      Object.defineProperty(HashSetIterator.prototype, "pointer", {
+        get: function () {
+          if (this._node === this._header) {
+            throwIteratorAccessError();
+          }
+          return this._node._key;
+        },
+        enumerable: false,
+        configurable: true
+      });
+      HashSetIterator.prototype.copy = function () {
+        return new HashSetIterator(this._node, this._header, this.container, this.iteratorType);
+      };
+      return HashSetIterator;
+    }(HashContainerIterator);
+    var HashSet = /** @class */function (_super) {
+      __extends(HashSet, _super);
+      function HashSet(container) {
+        if (container === void 0) {
+          container = [];
+        }
+        var _this = _super.call(this) || this;
+        var self = _this;
+        container.forEach(function (el) {
+          self.insert(el);
+        });
+        return _this;
+      }
+      HashSet.prototype.begin = function () {
+        return new HashSetIterator(this._head, this._header, this);
+      };
+      HashSet.prototype.end = function () {
+        return new HashSetIterator(this._header, this._header, this);
+      };
+      HashSet.prototype.rBegin = function () {
+        return new HashSetIterator(this._tail, this._header, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      HashSet.prototype.rEnd = function () {
+        return new HashSetIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      HashSet.prototype.front = function () {
+        return this._head._key;
+      };
+      HashSet.prototype.back = function () {
+        return this._tail._key;
+      };
+      /**
+       * @description Insert element to set.
+       * @param key - The key want to insert.
+       * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+       *                   If a `undefined` value is passed in, the type will be automatically judged.
+       * @returns The size of container after inserting.
+       */
+      HashSet.prototype.insert = function (key, isObject) {
+        return this._set(key, undefined, isObject);
+      };
+      HashSet.prototype.getElementByPos = function (pos) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        var node = this._head;
+        while (pos--) {
+          node = node._next;
+        }
+        return node._key;
+      };
+      /**
+       * @description Check key if exist in container.
+       * @param key - The element you want to search.
+       * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+       *                   If a `undefined` value is passed in, the type will be automatically judged.
+       * @returns An iterator pointing to the element if found, or super end if not found.
+       */
+      HashSet.prototype.find = function (key, isObject) {
+        var node = this._findElementNode(key, isObject);
+        return new HashSetIterator(node, this._header, this);
+      };
+      HashSet.prototype.forEach = function (callback) {
+        var index = 0;
+        var node = this._head;
+        while (node !== this._header) {
+          callback(node._key, index++, this);
+          node = node._next;
+        }
+      };
+      HashSet.prototype[Symbol.iterator] = function () {
+        return function () {
+          var node;
+          return __generator(this, function (_a) {
+            switch (_a.label) {
+              case 0:
+                node = this._head;
+                _a.label = 1;
+              case 1:
+                if (!(node !== this._header)) return [3 /*break*/, 3];
+                return [4 /*yield*/, node._key];
+              case 2:
+                _a.sent();
+                node = node._next;
+                return [3 /*break*/, 1];
+              case 3:
+                return [2 /*return*/];
+            }
+          });
+        }.bind(this)();
+      };
+      return HashSet;
+    }(HashContainer);
+
+    var HashMapIterator = /** @class */function (_super) {
+      __extends(HashMapIterator, _super);
+      function HashMapIterator(node, header, container, iteratorType) {
+        var _this = _super.call(this, node, header, iteratorType) || this;
+        _this.container = container;
+        return _this;
+      }
+      Object.defineProperty(HashMapIterator.prototype, "pointer", {
+        get: function () {
+          if (this._node === this._header) {
+            throwIteratorAccessError();
+          }
+          var self = this;
+          return new Proxy([], {
+            get: function (_, props) {
+              if (props === '0') return self._node._key;else if (props === '1') return self._node._value;
+            },
+            set: function (_, props, newValue) {
+              if (props !== '1') {
+                throw new TypeError('props must be 1');
+              }
+              self._node._value = newValue;
+              return true;
+            }
+          });
+        },
+        enumerable: false,
+        configurable: true
+      });
+      HashMapIterator.prototype.copy = function () {
+        return new HashMapIterator(this._node, this._header, this.container, this.iteratorType);
+      };
+      return HashMapIterator;
+    }(HashContainerIterator);
+    var HashMap = /** @class */function (_super) {
+      __extends(HashMap, _super);
+      function HashMap(container) {
+        if (container === void 0) {
+          container = [];
+        }
+        var _this = _super.call(this) || this;
+        var self = _this;
+        container.forEach(function (el) {
+          self.setElement(el[0], el[1]);
+        });
+        return _this;
+      }
+      HashMap.prototype.begin = function () {
+        return new HashMapIterator(this._head, this._header, this);
+      };
+      HashMap.prototype.end = function () {
+        return new HashMapIterator(this._header, this._header, this);
+      };
+      HashMap.prototype.rBegin = function () {
+        return new HashMapIterator(this._tail, this._header, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      HashMap.prototype.rEnd = function () {
+        return new HashMapIterator(this._header, this._header, this, 1 /* IteratorType.REVERSE */);
+      };
+
+      HashMap.prototype.front = function () {
+        if (this._length === 0) return;
+        return [this._head._key, this._head._value];
+      };
+      HashMap.prototype.back = function () {
+        if (this._length === 0) return;
+        return [this._tail._key, this._tail._value];
+      };
+      /**
+       * @description Insert a key-value pair or set value by the given key.
+       * @param key - The key want to insert.
+       * @param value - The value want to set.
+       * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+       *                   If a `undefined` value is passed in, the type will be automatically judged.
+       * @returns The size of container after setting.
+       */
+      HashMap.prototype.setElement = function (key, value, isObject) {
+        return this._set(key, value, isObject);
+      };
+      /**
+       * @description Get the value of the element of the specified key.
+       * @param key - The key want to search.
+       * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+       *                   If a `undefined` value is passed in, the type will be automatically judged.
+       * @example
+       * const val = container.getElementByKey(1);
+       */
+      HashMap.prototype.getElementByKey = function (key, isObject) {
+        if (isObject === undefined) isObject = checkObject(key);
+        if (isObject) {
+          var index = key[this.HASH_TAG];
+          return index !== undefined ? this._objMap[index]._value : undefined;
+        }
+        var node = this._originMap[key];
+        return node ? node._value : undefined;
+      };
+      HashMap.prototype.getElementByPos = function (pos) {
+        if (pos < 0 || pos > this._length - 1) {
+          throw new RangeError();
+        }
+        var node = this._head;
+        while (pos--) {
+          node = node._next;
+        }
+        return [node._key, node._value];
+      };
+      /**
+       * @description Check key if exist in container.
+       * @param key - The element you want to search.
+       * @param isObject - Tell us if the type of inserted key is `object` to improve efficiency.<br/>
+       *                   If a `undefined` value is passed in, the type will be automatically judged.
+       * @returns An iterator pointing to the element if found, or super end if not found.
+       */
+      HashMap.prototype.find = function (key, isObject) {
+        var node = this._findElementNode(key, isObject);
+        return new HashMapIterator(node, this._header, this);
+      };
+      HashMap.prototype.forEach = function (callback) {
+        var index = 0;
+        var node = this._head;
+        while (node !== this._header) {
+          callback([node._key, node._value], index++, this);
+          node = node._next;
+        }
+      };
+      HashMap.prototype[Symbol.iterator] = function () {
+        return function () {
+          var node;
+          return __generator(this, function (_a) {
+            switch (_a.label) {
+              case 0:
+                node = this._head;
+                _a.label = 1;
+              case 1:
+                if (!(node !== this._header)) return [3 /*break*/, 3];
+                return [4 /*yield*/, [node._key, node._value]];
+              case 2:
+                _a.sent();
+                node = node._next;
+                return [3 /*break*/, 1];
+              case 3:
+                return [2 /*return*/];
+            }
+          });
+        }.bind(this)();
+      };
+      return HashMap;
+    }(HashContainer);
+
+    exports.Deque = Deque;
+    exports.HashMap = HashMap;
+    exports.HashSet = HashSet;
+    exports.LinkList = LinkList;
+    exports.OrderedMap = OrderedMap;
+    exports.OrderedSet = OrderedSet;
+    exports.PriorityQueue = PriorityQueue;
+    exports.Queue = Queue;
+    exports.Stack = Stack;
+    exports.Vector = Vector;
+
+    Object.defineProperty(exports, '__esModule', { value: true });
+
+}));
diff --git a/mqtt-backend/node_modules/js-sdsl/dist/umd/js-sdsl.min.js b/mqtt-backend/node_modules/js-sdsl/dist/umd/js-sdsl.min.js
new file mode 100644
index 0000000..d9e814c
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/dist/umd/js-sdsl.min.js
@@ -0,0 +1,8 @@
+/*!
+ * js-sdsl v4.3.0
+ * https://github.com/js-sdsl/js-sdsl
+ * (c) 2021-present ZLY201 <zilongyao1366@gmail.com>
+ * MIT license
+ */
+!function(t,i){"object"==typeof exports&&"undefined"!=typeof module?i(exports):"function"==typeof define&&define.amd?define(["exports"],i):i((t="undefined"!=typeof globalThis?globalThis:t||self).sdsl={})}(this,function(t){"use strict";var L=function(t,i){return(L=Object.setPrototypeOf||({__proto__:[]}instanceof Array?function(t,i){t.__proto__=i}:function(t,i){for(var r in i)Object.prototype.hasOwnProperty.call(i,r)&&(t[r]=i[r])}))(t,i)};function i(t,i){if("function"!=typeof i&&null!==i)throw new TypeError("Class extends value "+String(i)+" is not a constructor or null");function r(){this.constructor=t}L(t,i),t.prototype=null===i?Object.create(i):(r.prototype=i.prototype,new r)}function r(e,n){var o,s,h,u={label:0,sent:function(){if(1&h[0])throw h[1];return h[1]},trys:[],ops:[]},f={next:t(0),throw:t(1),return:t(2)};return"function"==typeof Symbol&&(f[Symbol.iterator]=function(){return this}),f;function t(r){return function(t){var i=[r,t];if(o)throw new TypeError("Generator is already 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\ No newline at end of file
diff --git a/mqtt-backend/node_modules/js-sdsl/package.json b/mqtt-backend/node_modules/js-sdsl/package.json
new file mode 100644
index 0000000..1c35cd2
--- /dev/null
+++ b/mqtt-backend/node_modules/js-sdsl/package.json
@@ -0,0 +1,166 @@
+{
+  "name": "js-sdsl",
+  "version": "4.3.0",
+  "description": "javascript standard data structure library which benchmark against C++ STL",
+  "main": "./dist/cjs/index.js",
+  "module": "./dist/esm/index.js",
+  "types": "./dist/esm/index.d.ts",
+  "author": {
+    "name": "ZLY201",
+    "email": "951711127@qq.com",
+    "url": "https://github.com/js-sdsl/js-sdsl"
+  },
+  "sideEffects": false,
+  "homepage": "https://js-sdsl.org",
+  "funding": {
+    "type": "opencollective",
+    "url": "https://opencollective.com/js-sdsl"
+  },
+  "scripts": {
+    "setup": "rm -rf node_modules && yarn install",
+    "dev": "ttsc --project tsconfig.dev.json --watch",
+    "build": "gulp",
+    "build:cjs": "gulp cjs",
+    "build:esm": "gulp esm",
+    "build:umd": "gulp umd",
+    "build:umd:min": "yarn build:umd && gulp umd:min",
+    "build:isolate": "gulp isolate",
+    "build:all": "yarn build && yarn build:isolate",
+    "test": "yarn test:unit && yarn test:chrome && yarn test:performance",
+    "test:unit": "nyc ts-mocha --paths 'test/**/*.test.ts' --timeout 10000",
+    "test:edge": "karma start --browsers Edge",
+    "test:safari": "karma start --browsers SafariNative",
+    "test:chrome": "karma start --browsers ChromeHeadless",
+    "test:firefox": "karma start --browsers Firefox",
+    "test:isolate": "yarn build:isolate && ts-mocha --paths 'test/IsolationTest/*.ts'",
+    "test:performance": "gulp performance && node dist/performance/performance/index.js",
+    "lint": "eslint --fix --color --cache --max-warnings=0 .",
+    "generate": "typedoc src/index.ts --includeVersion --sort required-first --sort instance-first --sort source-order",
+    "generate:dev": "yarn generate --watch",
+    "prepare": "husky install"
+  },
+  "lint-staged": {
+    "*.{js,ts}": [
+      "yarn lint"
+    ]
+  },
+  "devDependencies": {
+    "@babel/core": "^7.19.3",
+    "@babel/plugin-transform-modules-commonjs": "^7.18.6",
+    "@rollup/plugin-babel": "^5.3.1",
+    "@rollup/plugin-typescript": "^9.0.2",
+    "@types/babel__core": "^7.1.19",
+    "@types/chai": "^3.5.2",
+    "@types/delete-empty": "^3.0.2",
+    "@types/gulp": "^4.0.9",
+    "@types/gulp-babel": "^6.1.30",
+    "@types/gulp-filter": "^3.0.34",
+    "@types/gulp-rename": "^2.0.1",
+    "@types/gulp-sourcemaps": "^0.0.35",
+    "@types/gulp-tap": "^1.0.1",
+    "@types/gulp-terser": "^1.2.1",
+    "@types/gulp-uglify": "^3.0.7",
+    "@types/karma": "^6.3.3",
+    "@types/merge-stream": "^1.1.2",
+    "@types/mocha": "^9.1.1",
+    "@types/node": "^17.0.0",
+    "@typescript-eslint/eslint-plugin": "^5.33.1",
+    "@typescript-eslint/parser": "^5.33.1",
+    "all-contributors-cli": "^6.20.0",
+    "babel-plugin-remove-unused-import": "^2.1.1",
+    "browserslist": "^4.21.3",
+    "chai": "^3.5.0",
+    "commitlint": "^17.0.3",
+    "compare-versions": "^5.0.1",
+    "conventional-changelog-conventionalcommits": "^5.0.0",
+    "delete-empty": "^3.0.0",
+    "eslint": "^8.23.1",
+    "eslint-import-resolver-typescript": "^3.5.2",
+    "eslint-plugin-compat": "^4.0.2",
+    "eslint-plugin-import": "^2.26.0",
+    "get-npm-package-version": "^1.1.1",
+    "gh-pages": "^3.2.3",
+    "gulp": "^4.0.2",
+    "gulp-babel": "^8.0.0",
+    "gulp-clean": "^0.4.0",
+    "gulp-filter": "^7.0.0",
+    "gulp-rename": "^2.0.0",
+    "gulp-sourcemaps": "^3.0.0",
+    "gulp-tap": "^2.0.0",
+    "gulp-terser": "^2.1.0",
+    "gulp-typescript": "^5.0.0",
+    "gulp-uglify": "^3.0.2",
+    "husky": "^8.0.1",
+    "karma": "^6.4.1",
+    "karma-chrome-launcher": "^3.1.1",
+    "karma-edge-launcher": "^0.4.2",
+    "karma-firefox-launcher": "^2.1.2",
+    "karma-mocha": "^2.0.1",
+    "karma-mocha-reporter": "^2.2.5",
+    "karma-requirejs": "^1.1.0",
+    "karma-safarinative-launcher": "^1.1.0",
+    "karma-typescript": "^5.5.3",
+    "lint-staged": "^13.0.3",
+    "merge-stream": "^2.0.0",
+    "mocha": "^9.2.2",
+    "nyc": "^15.1.0",
+    "requirejs": "^2.3.6",
+    "rollup": "^2.79.1",
+    "rollup-plugin-license": "^3.0.0",
+    "rollup-plugin-ts": "^3.0.2",
+    "ts-macros": "^1.3.3",
+    "ts-mocha": "^10.0.0",
+    "ts-node": "^10.9.1",
+    "ts-transform-paths": "^2.0.3",
+    "tsconfig-paths": "^4.0.0",
+    "tslib": "^2.4.0",
+    "ttypescript": "^1.5.13",
+    "typedoc": "^0.23.10",
+    "typedoc-plugin-missing-exports": "^1.0.0",
+    "typescript": "~4.7.4"
+  },
+  "repository": {
+    "type": "github",
+    "url": "https://github.com/js-sdsl/js-sdsl.git"
+  },
+  "license": "MIT",
+  "files": [
+    "dist/cjs",
+    "dist/esm",
+    "dist/umd",
+    "CHANGELOG.md"
+  ],
+  "keywords": [
+    "data",
+    "structure",
+    "data structure",
+    "rbTree",
+    "rbtree",
+    "RBTree",
+    "red black tree",
+    "ordered",
+    "set",
+    "map",
+    "ordered map",
+    "ordered set",
+    "deque",
+    "heap",
+    "priority queue",
+    "link list",
+    "LinkList",
+    "linkedList",
+    "vector",
+    "stack",
+    "queue",
+    "hash",
+    "hash set",
+    "hash map",
+    "c++",
+    "stl"
+  ],
+  "bugs": {
+    "email": "951711127@qq.com",
+    "url": "https://github.com/js-sdsl/js-sdsl/issues"
+  },
+  "dependencies": {}
+}
diff --git a/mqtt-backend/node_modules/lru-cache/LICENSE b/mqtt-backend/node_modules/lru-cache/LICENSE
new file mode 100644
index 0000000..f785757
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/LICENSE
@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) 2010-2023 Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/mqtt-backend/node_modules/lru-cache/README.md b/mqtt-backend/node_modules/lru-cache/README.md
new file mode 100644
index 0000000..931822f
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/README.md
@@ -0,0 +1,331 @@
+# lru-cache
+
+A cache object that deletes the least-recently-used items.
+
+Specify a max number of the most recently used items that you
+want to keep, and this cache will keep that many of the most
+recently accessed items.
+
+This is not primarily a TTL cache, and does not make strong TTL
+guarantees. There is no preemptive pruning of expired items by
+default, but you _may_ set a TTL on the cache or on a single
+`set`. If you do so, it will treat expired items as missing, and
+delete them when fetched. If you are more interested in TTL
+caching than LRU caching, check out
+[@isaacs/ttlcache](http://npm.im/@isaacs/ttlcache).
+
+As of version 7, this is one of the most performant LRU
+implementations available in JavaScript, and supports a wide
+diversity of use cases. However, note that using some of the
+features will necessarily impact performance, by causing the
+cache to have to do more work. See the "Performance" section
+below.
+
+## Installation
+
+```bash
+npm install lru-cache --save
+```
+
+## Usage
+
+```js
+// hybrid module, either works
+import { LRUCache } from 'lru-cache'
+// or:
+const { LRUCache } = require('lru-cache')
+// or in minified form for web browsers:
+import { LRUCache } from 'http://unpkg.com/lru-cache@9/dist/mjs/index.min.mjs'
+
+// At least one of 'max', 'ttl', or 'maxSize' is required, to prevent
+// unsafe unbounded storage.
+//
+// In most cases, it's best to specify a max for performance, so all
+// the required memory allocation is done up-front.
+//
+// All the other options are optional, see the sections below for
+// documentation on what each one does.  Most of them can be
+// overridden for specific items in get()/set()
+const options = {
+  max: 500,
+
+  // for use with tracking overall storage size
+  maxSize: 5000,
+  sizeCalculation: (value, key) => {
+    return 1
+  },
+
+  // for use when you need to clean up something when objects
+  // are evicted from the cache
+  dispose: (value, key) => {
+    freeFromMemoryOrWhatever(value)
+  },
+
+  // how long to live in ms
+  ttl: 1000 * 60 * 5,
+
+  // return stale items before removing from cache?
+  allowStale: false,
+
+  updateAgeOnGet: false,
+  updateAgeOnHas: false,
+
+  // async method to use for cache.fetch(), for
+  // stale-while-revalidate type of behavior
+  fetchMethod: async (
+    key,
+    staleValue,
+    { options, signal, context }
+  ) => {},
+}
+
+const cache = new LRUCache(options)
+
+cache.set('key', 'value')
+cache.get('key') // "value"
+
+// non-string keys ARE fully supported
+// but note that it must be THE SAME object, not
+// just a JSON-equivalent object.
+var someObject = { a: 1 }
+cache.set(someObject, 'a value')
+// Object keys are not toString()-ed
+cache.set('[object Object]', 'a different value')
+assert.equal(cache.get(someObject), 'a value')
+// A similar object with same keys/values won't work,
+// because it's a different object identity
+assert.equal(cache.get({ a: 1 }), undefined)
+
+cache.clear() // empty the cache
+```
+
+If you put more stuff in the cache, then less recently used items
+will fall out. That's what an LRU cache is.
+
+For full description of the API and all options, please see [the
+LRUCache typedocs](https://isaacs.github.io/node-lru-cache/)
+
+## Storage Bounds Safety
+
+This implementation aims to be as flexible as possible, within
+the limits of safe memory consumption and optimal performance.
+
+At initial object creation, storage is allocated for `max` items.
+If `max` is set to zero, then some performance is lost, and item
+count is unbounded. Either `maxSize` or `ttl` _must_ be set if
+`max` is not specified.
+
+If `maxSize` is set, then this creates a safe limit on the
+maximum storage consumed, but without the performance benefits of
+pre-allocation. When `maxSize` is set, every item _must_ provide
+a size, either via the `sizeCalculation` method provided to the
+constructor, or via a `size` or `sizeCalculation` option provided
+to `cache.set()`. The size of every item _must_ be a positive
+integer.
+
+If neither `max` nor `maxSize` are set, then `ttl` tracking must
+be enabled. Note that, even when tracking item `ttl`, items are
+_not_ preemptively deleted when they become stale, unless
+`ttlAutopurge` is enabled. Instead, they are only purged the
+next time the key is requested. Thus, if `ttlAutopurge`, `max`,
+and `maxSize` are all not set, then the cache will potentially
+grow unbounded.
+
+In this case, a warning is printed to standard error. Future
+versions may require the use of `ttlAutopurge` if `max` and
+`maxSize` are not specified.
+
+If you truly wish to use a cache that is bound _only_ by TTL
+expiration, consider using a `Map` object, and calling
+`setTimeout` to delete entries when they expire. It will perform
+much better than an LRU cache.
+
+Here is an implementation you may use, under the same
+[license](./LICENSE) as this package:
+
+```js
+// a storage-unbounded ttl cache that is not an lru-cache
+const cache = {
+  data: new Map(),
+  timers: new Map(),
+  set: (k, v, ttl) => {
+    if (cache.timers.has(k)) {
+      clearTimeout(cache.timers.get(k))
+    }
+    cache.timers.set(
+      k,
+      setTimeout(() => cache.delete(k), ttl)
+    )
+    cache.data.set(k, v)
+  },
+  get: k => cache.data.get(k),
+  has: k => cache.data.has(k),
+  delete: k => {
+    if (cache.timers.has(k)) {
+      clearTimeout(cache.timers.get(k))
+    }
+    cache.timers.delete(k)
+    return cache.data.delete(k)
+  },
+  clear: () => {
+    cache.data.clear()
+    for (const v of cache.timers.values()) {
+      clearTimeout(v)
+    }
+    cache.timers.clear()
+  },
+}
+```
+
+If that isn't to your liking, check out
+[@isaacs/ttlcache](http://npm.im/@isaacs/ttlcache).
+
+## Storing Undefined Values
+
+This cache never stores undefined values, as `undefined` is used
+internally in a few places to indicate that a key is not in the
+cache.
+
+You may call `cache.set(key, undefined)`, but this is just
+an alias for `cache.delete(key)`. Note that this has the effect
+that `cache.has(key)` will return _false_ after setting it to
+undefined.
+
+```js
+cache.set(myKey, undefined)
+cache.has(myKey) // false!
+```
+
+If you need to track `undefined` values, and still note that the
+key is in the cache, an easy workaround is to use a sigil object
+of your own.
+
+```js
+import { LRUCache } from 'lru-cache'
+const undefinedValue = Symbol('undefined')
+const cache = new LRUCache(...)
+const mySet = (key, value) =>
+  cache.set(key, value === undefined ? undefinedValue : value)
+const myGet = (key, value) => {
+  const v = cache.get(key)
+  return v === undefinedValue ? undefined : v
+}
+```
+
+## Performance
+
+As of January 2022, version 7 of this library is one of the most
+performant LRU cache implementations in JavaScript.
+
+Benchmarks can be extremely difficult to get right. In
+particular, the performance of set/get/delete operations on
+objects will vary _wildly_ depending on the type of key used. V8
+is highly optimized for objects with keys that are short strings,
+especially integer numeric strings. Thus any benchmark which
+tests _solely_ using numbers as keys will tend to find that an
+object-based approach performs the best.
+
+Note that coercing _anything_ to strings to use as object keys is
+unsafe, unless you can be 100% certain that no other type of
+value will be used. For example:
+
+```js
+const myCache = {}
+const set = (k, v) => (myCache[k] = v)
+const get = k => myCache[k]
+
+set({}, 'please hang onto this for me')
+set('[object Object]', 'oopsie')
+```
+
+Also beware of "Just So" stories regarding performance. Garbage
+collection of large (especially: deep) object graphs can be
+incredibly costly, with several "tipping points" where it
+increases exponentially. As a result, putting that off until
+later can make it much worse, and less predictable. If a library
+performs well, but only in a scenario where the object graph is
+kept shallow, then that won't help you if you are using large
+objects as keys.
+
+In general, when attempting to use a library to improve
+performance (such as a cache like this one), it's best to choose
+an option that will perform well in the sorts of scenarios where
+you'll actually use it.
+
+This library is optimized for repeated gets and minimizing
+eviction time, since that is the expected need of a LRU. Set
+operations are somewhat slower on average than a few other
+options, in part because of that optimization. It is assumed
+that you'll be caching some costly operation, ideally as rarely
+as possible, so optimizing set over get would be unwise.
+
+If performance matters to you:
+
+1. If it's at all possible to use small integer values as keys,
+   and you can guarantee that no other types of values will be
+   used as keys, then do that, and use a cache such as
+   [lru-fast](https://npmjs.com/package/lru-fast), or
+   [mnemonist's
+   LRUCache](https://yomguithereal.github.io/mnemonist/lru-cache)
+   which uses an Object as its data store.
+
+2. Failing that, if at all possible, use short non-numeric
+   strings (ie, less than 256 characters) as your keys, and use
+   [mnemonist's
+   LRUCache](https://yomguithereal.github.io/mnemonist/lru-cache).
+
+3. If the types of your keys will be anything else, especially
+   long strings, strings that look like floats, objects, or some
+   mix of types, or if you aren't sure, then this library will
+   work well for you.
+
+   If you do not need the features that this library provides
+   (like asynchronous fetching, a variety of TTL staleness
+   options, and so on), then [mnemonist's
+   LRUMap](https://yomguithereal.github.io/mnemonist/lru-map) is
+   a very good option, and just slightly faster than this module
+   (since it does considerably less).
+
+4. Do not use a `dispose` function, size tracking, or especially
+   ttl behavior, unless absolutely needed. These features are
+   convenient, and necessary in some use cases, and every attempt
+   has been made to make the performance impact minimal, but it
+   isn't nothing.
+
+## Breaking Changes in Version 7
+
+This library changed to a different algorithm and internal data
+structure in version 7, yielding significantly better
+performance, albeit with some subtle changes as a result.
+
+If you were relying on the internals of LRUCache in version 6 or
+before, it probably will not work in version 7 and above.
+
+## Breaking Changes in Version 8
+
+- The `fetchContext` option was renamed to `context`, and may no
+  longer be set on the cache instance itself.
+- Rewritten in TypeScript, so pretty much all the types moved
+  around a lot.
+- The AbortController/AbortSignal polyfill was removed. For this
+  reason, **Node version 16.14.0 or higher is now required**.
+- Internal properties were moved to actual private class
+  properties.
+- Keys and values must not be `null` or `undefined`.
+- Minified export available at `'lru-cache/min'`, for both CJS
+  and MJS builds.
+
+## Breaking Changes in Version 9
+
+- Named export only, no default export.
+- AbortController polyfill returned, albeit with a warning when
+  used.
+
+## Breaking Changes in Version 10
+
+- `cache.fetch()` return type is now `Promise<V | undefined>`
+  instead of `Promise<V | void>`. This is an irrelevant change
+  practically speaking, but can require changes for TypeScript
+  users.
+
+For more info, see the [change log](CHANGELOG.md).
diff --git a/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.d.ts b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.d.ts
new file mode 100644
index 0000000..f59de76
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.d.ts
@@ -0,0 +1,1277 @@
+/**
+ * @module LRUCache
+ */
+declare const TYPE: unique symbol;
+export type PosInt = number & {
+    [TYPE]: 'Positive Integer';
+};
+export type Index = number & {
+    [TYPE]: 'LRUCache Index';
+};
+export type UintArray = Uint8Array | Uint16Array | Uint32Array;
+export type NumberArray = UintArray | number[];
+declare class ZeroArray extends Array<number> {
+    constructor(size: number);
+}
+export type { ZeroArray };
+export type { Stack };
+export type StackLike = Stack | Index[];
+declare class Stack {
+    #private;
+    heap: NumberArray;
+    length: number;
+    static create(max: number): StackLike;
+    constructor(max: number, HeapCls: {
+        new (n: number): NumberArray;
+    });
+    push(n: Index): void;
+    pop(): Index;
+}
+/**
+ * Promise representing an in-progress {@link LRUCache#fetch} call
+ */
+export type BackgroundFetch<V> = Promise<V | undefined> & {
+    __returned: BackgroundFetch<V> | undefined;
+    __abortController: AbortController;
+    __staleWhileFetching: V | undefined;
+};
+export type DisposeTask<K, V> = [
+    value: V,
+    key: K,
+    reason: LRUCache.DisposeReason
+];
+export declare namespace LRUCache {
+    /**
+     * An integer greater than 0, reflecting the calculated size of items
+     */
+    type Size = number;
+    /**
+     * Integer greater than 0, representing some number of milliseconds, or the
+     * time at which a TTL started counting from.
+     */
+    type Milliseconds = number;
+    /**
+     * An integer greater than 0, reflecting a number of items
+     */
+    type Count = number;
+    /**
+     * The reason why an item was removed from the cache, passed
+     * to the {@link Disposer} methods.
+     *
+     * - `evict`: The item was evicted because it is the least recently used,
+     *   and the cache is full.
+     * - `set`: A new value was set, overwriting the old value being disposed.
+     * - `delete`: The item was explicitly deleted, either by calling
+     *   {@link LRUCache#delete}, {@link LRUCache#clear}, or
+     *   {@link LRUCache#set} with an undefined value.
+     * - `expire`: The item was removed due to exceeding its TTL.
+     * - `fetch`: A {@link OptionsBase#fetchMethod} operation returned
+     *   `undefined` or was aborted, causing the item to be deleted.
+     */
+    type DisposeReason = 'evict' | 'set' | 'delete' | 'expire' | 'fetch';
+    /**
+     * A method called upon item removal, passed as the
+     * {@link OptionsBase.dispose} and/or
+     * {@link OptionsBase.disposeAfter} options.
+     */
+    type Disposer<K, V> = (value: V, key: K, reason: DisposeReason) => void;
+    /**
+     * A function that returns the effective calculated size
+     * of an entry in the cache.
+     */
+    type SizeCalculator<K, V> = (value: V, key: K) => Size;
+    /**
+     * Options provided to the
+     * {@link OptionsBase.fetchMethod} function.
+     */
+    interface FetcherOptions<K, V, FC = unknown> {
+        signal: AbortSignal;
+        options: FetcherFetchOptions<K, V, FC>;
+        /**
+         * Object provided in the {@link FetchOptions.context} option to
+         * {@link LRUCache#fetch}
+         */
+        context: FC;
+    }
+    /**
+     * Occasionally, it may be useful to track the internal behavior of the
+     * cache, particularly for logging, debugging, or for behavior within the
+     * `fetchMethod`. To do this, you can pass a `status` object to the
+     * {@link LRUCache#fetch}, {@link LRUCache#get}, {@link LRUCache#set},
+     * {@link LRUCache#memo}, and {@link LRUCache#has} methods.
+     *
+     * The `status` option should be a plain JavaScript object. The following
+     * fields will be set on it appropriately, depending on the situation.
+     */
+    interface Status<V> {
+        /**
+         * The status of a set() operation.
+         *
+         * - add: the item was not found in the cache, and was added
+         * - update: the item was in the cache, with the same value provided
+         * - replace: the item was in the cache, and replaced
+         * - miss: the item was not added to the cache for some reason
+         */
+        set?: 'add' | 'update' | 'replace' | 'miss';
+        /**
+         * the ttl stored for the item, or undefined if ttls are not used.
+         */
+        ttl?: Milliseconds;
+        /**
+         * the start time for the item, or undefined if ttls are not used.
+         */
+        start?: Milliseconds;
+        /**
+         * The timestamp used for TTL calculation
+         */
+        now?: Milliseconds;
+        /**
+         * the remaining ttl for the item, or undefined if ttls are not used.
+         */
+        remainingTTL?: Milliseconds;
+        /**
+         * The calculated size for the item, if sizes are used.
+         */
+        entrySize?: Size;
+        /**
+         * The total calculated size of the cache, if sizes are used.
+         */
+        totalCalculatedSize?: Size;
+        /**
+         * A flag indicating that the item was not stored, due to exceeding the
+         * {@link OptionsBase.maxEntrySize}
+         */
+        maxEntrySizeExceeded?: true;
+        /**
+         * The old value, specified in the case of `set:'update'` or
+         * `set:'replace'`
+         */
+        oldValue?: V;
+        /**
+         * The results of a {@link LRUCache#has} operation
+         *
+         * - hit: the item was found in the cache
+         * - stale: the item was found in the cache, but is stale
+         * - miss: the item was not found in the cache
+         */
+        has?: 'hit' | 'stale' | 'miss';
+        /**
+         * The status of a {@link LRUCache#fetch} operation.
+         * Note that this can change as the underlying fetch() moves through
+         * various states.
+         *
+         * - inflight: there is another fetch() for this key which is in process
+         * - get: there is no {@link OptionsBase.fetchMethod}, so
+         *   {@link LRUCache#get} was called.
+         * - miss: the item is not in cache, and will be fetched.
+         * - hit: the item is in the cache, and was resolved immediately.
+         * - stale: the item is in the cache, but stale.
+         * - refresh: the item is in the cache, and not stale, but
+         *   {@link FetchOptions.forceRefresh} was specified.
+         */
+        fetch?: 'get' | 'inflight' | 'miss' | 'hit' | 'stale' | 'refresh';
+        /**
+         * The {@link OptionsBase.fetchMethod} was called
+         */
+        fetchDispatched?: true;
+        /**
+         * The cached value was updated after a successful call to
+         * {@link OptionsBase.fetchMethod}
+         */
+        fetchUpdated?: true;
+        /**
+         * The reason for a fetch() rejection.  Either the error raised by the
+         * {@link OptionsBase.fetchMethod}, or the reason for an
+         * AbortSignal.
+         */
+        fetchError?: Error;
+        /**
+         * The fetch received an abort signal
+         */
+        fetchAborted?: true;
+        /**
+         * The abort signal received was ignored, and the fetch was allowed to
+         * continue.
+         */
+        fetchAbortIgnored?: true;
+        /**
+         * The fetchMethod promise resolved successfully
+         */
+        fetchResolved?: true;
+        /**
+         * The fetchMethod promise was rejected
+         */
+        fetchRejected?: true;
+        /**
+         * The status of a {@link LRUCache#get} operation.
+         *
+         * - fetching: The item is currently being fetched.  If a previous value
+         *   is present and allowed, that will be returned.
+         * - stale: The item is in the cache, and is stale.
+         * - hit: the item is in the cache
+         * - miss: the item is not in the cache
+         */
+        get?: 'stale' | 'hit' | 'miss';
+        /**
+         * A fetch or get operation returned a stale value.
+         */
+        returnedStale?: true;
+    }
+    /**
+     * options which override the options set in the LRUCache constructor
+     * when calling {@link LRUCache#fetch}.
+     *
+     * This is the union of {@link GetOptions} and {@link SetOptions}, plus
+     * {@link OptionsBase.noDeleteOnFetchRejection},
+     * {@link OptionsBase.allowStaleOnFetchRejection},
+     * {@link FetchOptions.forceRefresh}, and
+     * {@link FetcherOptions.context}
+     *
+     * Any of these may be modified in the {@link OptionsBase.fetchMethod}
+     * function, but the {@link GetOptions} fields will of course have no
+     * effect, as the {@link LRUCache#get} call already happened by the time
+     * the fetchMethod is called.
+     */
+    interface FetcherFetchOptions<K, V, FC = unknown> extends Pick<OptionsBase<K, V, FC>, 'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet' | 'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL' | 'noDeleteOnFetchRejection' | 'allowStaleOnFetchRejection' | 'ignoreFetchAbort' | 'allowStaleOnFetchAbort'> {
+        status?: Status<V>;
+        size?: Size;
+    }
+    /**
+     * Options that may be passed to the {@link LRUCache#fetch} method.
+     */
+    interface FetchOptions<K, V, FC> extends FetcherFetchOptions<K, V, FC> {
+        /**
+         * Set to true to force a re-load of the existing data, even if it
+         * is not yet stale.
+         */
+        forceRefresh?: boolean;
+        /**
+         * Context provided to the {@link OptionsBase.fetchMethod} as
+         * the {@link FetcherOptions.context} param.
+         *
+         * If the FC type is specified as unknown (the default),
+         * undefined or void, then this is optional.  Otherwise, it will
+         * be required.
+         */
+        context?: FC;
+        signal?: AbortSignal;
+        status?: Status<V>;
+    }
+    /**
+     * Options provided to {@link LRUCache#fetch} when the FC type is something
+     * other than `unknown`, `undefined`, or `void`
+     */
+    interface FetchOptionsWithContext<K, V, FC> extends FetchOptions<K, V, FC> {
+        context: FC;
+    }
+    /**
+     * Options provided to {@link LRUCache#fetch} when the FC type is
+     * `undefined` or `void`
+     */
+    interface FetchOptionsNoContext<K, V> extends FetchOptions<K, V, undefined> {
+        context?: undefined;
+    }
+    interface MemoOptions<K, V, FC = unknown> extends Pick<OptionsBase<K, V, FC>, 'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet' | 'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL' | 'noDeleteOnFetchRejection' | 'allowStaleOnFetchRejection' | 'ignoreFetchAbort' | 'allowStaleOnFetchAbort'> {
+        /**
+         * Set to true to force a re-load of the existing data, even if it
+         * is not yet stale.
+         */
+        forceRefresh?: boolean;
+        /**
+         * Context provided to the {@link OptionsBase.memoMethod} as
+         * the {@link MemoizerOptions.context} param.
+         *
+         * If the FC type is specified as unknown (the default),
+         * undefined or void, then this is optional.  Otherwise, it will
+         * be required.
+         */
+        context?: FC;
+        status?: Status<V>;
+    }
+    /**
+     * Options provided to {@link LRUCache#memo} when the FC type is something
+     * other than `unknown`, `undefined`, or `void`
+     */
+    interface MemoOptionsWithContext<K, V, FC> extends MemoOptions<K, V, FC> {
+        context: FC;
+    }
+    /**
+     * Options provided to {@link LRUCache#memo} when the FC type is
+     * `undefined` or `void`
+     */
+    interface MemoOptionsNoContext<K, V> extends MemoOptions<K, V, undefined> {
+        context?: undefined;
+    }
+    /**
+     * Options provided to the
+     * {@link OptionsBase.memoMethod} function.
+     */
+    interface MemoizerOptions<K, V, FC = unknown> {
+        options: MemoizerMemoOptions<K, V, FC>;
+        /**
+         * Object provided in the {@link MemoOptions.context} option to
+         * {@link LRUCache#memo}
+         */
+        context: FC;
+    }
+    /**
+     * options which override the options set in the LRUCache constructor
+     * when calling {@link LRUCache#memo}.
+     *
+     * This is the union of {@link GetOptions} and {@link SetOptions}, plus
+     * {@link MemoOptions.forceRefresh}, and
+     * {@link MemoerOptions.context}
+     *
+     * Any of these may be modified in the {@link OptionsBase.memoMethod}
+     * function, but the {@link GetOptions} fields will of course have no
+     * effect, as the {@link LRUCache#get} call already happened by the time
+     * the memoMethod is called.
+     */
+    interface MemoizerMemoOptions<K, V, FC = unknown> extends Pick<OptionsBase<K, V, FC>, 'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet' | 'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL'> {
+        status?: Status<V>;
+        size?: Size;
+        start?: Milliseconds;
+    }
+    /**
+     * Options that may be passed to the {@link LRUCache#has} method.
+     */
+    interface HasOptions<K, V, FC> extends Pick<OptionsBase<K, V, FC>, 'updateAgeOnHas'> {
+        status?: Status<V>;
+    }
+    /**
+     * Options that may be passed to the {@link LRUCache#get} method.
+     */
+    interface GetOptions<K, V, FC> extends Pick<OptionsBase<K, V, FC>, 'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet'> {
+        status?: Status<V>;
+    }
+    /**
+     * Options that may be passed to the {@link LRUCache#peek} method.
+     */
+    interface PeekOptions<K, V, FC> extends Pick<OptionsBase<K, V, FC>, 'allowStale'> {
+    }
+    /**
+     * Options that may be passed to the {@link LRUCache#set} method.
+     */
+    interface SetOptions<K, V, FC> extends Pick<OptionsBase<K, V, FC>, 'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL'> {
+        /**
+         * If size tracking is enabled, then setting an explicit size
+         * in the {@link LRUCache#set} call will prevent calling the
+         * {@link OptionsBase.sizeCalculation} function.
+         */
+        size?: Size;
+        /**
+         * If TTL tracking is enabled, then setting an explicit start
+         * time in the {@link LRUCache#set} call will override the
+         * default time from `performance.now()` or `Date.now()`.
+         *
+         * Note that it must be a valid value for whichever time-tracking
+         * method is in use.
+         */
+        start?: Milliseconds;
+        status?: Status<V>;
+    }
+    /**
+     * The type signature for the {@link OptionsBase.fetchMethod} option.
+     */
+    type Fetcher<K, V, FC = unknown> = (key: K, staleValue: V | undefined, options: FetcherOptions<K, V, FC>) => Promise<V | undefined | void> | V | undefined | void;
+    /**
+     * the type signature for the {@link OptionsBase.memoMethod} option.
+     */
+    type Memoizer<K, V, FC = unknown> = (key: K, staleValue: V | undefined, options: MemoizerOptions<K, V, FC>) => V;
+    /**
+     * Options which may be passed to the {@link LRUCache} constructor.
+     *
+     * Most of these may be overridden in the various options that use
+     * them.
+     *
+     * Despite all being technically optional, the constructor requires that
+     * a cache is at minimum limited by one or more of {@link OptionsBase.max},
+     * {@link OptionsBase.ttl}, or {@link OptionsBase.maxSize}.
+     *
+     * If {@link OptionsBase.ttl} is used alone, then it is strongly advised
+     * (and in fact required by the type definitions here) that the cache
+     * also set {@link OptionsBase.ttlAutopurge}, to prevent potentially
+     * unbounded storage.
+     *
+     * All options are also available on the {@link LRUCache} instance, making
+     * it safe to pass an LRUCache instance as the options argumemnt to
+     * make another empty cache of the same type.
+     *
+     * Some options are marked as read-only, because changing them after
+     * instantiation is not safe. Changing any of the other options will of
+     * course only have an effect on subsequent method calls.
+     */
+    interface OptionsBase<K, V, FC> {
+        /**
+         * The maximum number of items to store in the cache before evicting
+         * old entries. This is read-only on the {@link LRUCache} instance,
+         * and may not be overridden.
+         *
+         * If set, then storage space will be pre-allocated at construction
+         * time, and the cache will perform significantly faster.
+         *
+         * Note that significantly fewer items may be stored, if
+         * {@link OptionsBase.maxSize} and/or {@link OptionsBase.ttl} are also
+         * set.
+         *
+         * **It is strongly recommended to set a `max` to prevent unbounded growth
+         * of the cache.**
+         */
+        max?: Count;
+        /**
+         * Max time in milliseconds for items to live in cache before they are
+         * considered stale.  Note that stale items are NOT preemptively removed by
+         * default, and MAY live in the cache, contributing to its LRU max, long
+         * after they have expired, unless {@link OptionsBase.ttlAutopurge} is
+         * set.
+         *
+         * If set to `0` (the default value), then that means "do not track
+         * TTL", not "expire immediately".
+         *
+         * Also, as this cache is optimized for LRU/MRU operations, some of
+         * the staleness/TTL checks will reduce performance, as they will incur
+         * overhead by deleting items.
+         *
+         * This is not primarily a TTL cache, and does not make strong TTL
+         * guarantees. There is no pre-emptive pruning of expired items, but you
+         * _may_ set a TTL on the cache, and it will treat expired items as missing
+         * when they are fetched, and delete them.
+         *
+         * Optional, but must be a non-negative integer in ms if specified.
+         *
+         * This may be overridden by passing an options object to `cache.set()`.
+         *
+         * At least one of `max`, `maxSize`, or `TTL` is required. This must be a
+         * positive integer if set.
+         *
+         * Even if ttl tracking is enabled, **it is strongly recommended to set a
+         * `max` to prevent unbounded growth of the cache.**
+         *
+         * If ttl tracking is enabled, and `max` and `maxSize` are not set,
+         * and `ttlAutopurge` is not set, then a warning will be emitted
+         * cautioning about the potential for unbounded memory consumption.
+         * (The TypeScript definitions will also discourage this.)
+         */
+        ttl?: Milliseconds;
+        /**
+         * Minimum amount of time in ms in which to check for staleness.
+         * Defaults to 1, which means that the current time is checked
+         * at most once per millisecond.
+         *
+         * Set to 0 to check the current time every time staleness is tested.
+         * (This reduces performance, and is theoretically unnecessary.)
+         *
+         * Setting this to a higher value will improve performance somewhat
+         * while using ttl tracking, albeit at the expense of keeping stale
+         * items around a bit longer than their TTLs would indicate.
+         *
+         * @default 1
+         */
+        ttlResolution?: Milliseconds;
+        /**
+         * Preemptively remove stale items from the cache.
+         *
+         * Note that this may *significantly* degrade performance, especially if
+         * the cache is storing a large number of items. It is almost always best
+         * to just leave the stale items in the cache, and let them fall out as new
+         * items are added.
+         *
+         * Note that this means that {@link OptionsBase.allowStale} is a bit
+         * pointless, as stale items will be deleted almost as soon as they
+         * expire.
+         *
+         * Use with caution!
+         */
+        ttlAutopurge?: boolean;
+        /**
+         * When using time-expiring entries with `ttl`, setting this to `true` will
+         * make each item's age reset to 0 whenever it is retrieved from cache with
+         * {@link LRUCache#get}, causing it to not expire. (It can still fall out
+         * of cache based on recency of use, of course.)
+         *
+         * Has no effect if {@link OptionsBase.ttl} is not set.
+         *
+         * This may be overridden by passing an options object to `cache.get()`.
+         */
+        updateAgeOnGet?: boolean;
+        /**
+         * When using time-expiring entries with `ttl`, setting this to `true` will
+         * make each item's age reset to 0 whenever its presence in the cache is
+         * checked with {@link LRUCache#has}, causing it to not expire. (It can
+         * still fall out of cache based on recency of use, of course.)
+         *
+         * Has no effect if {@link OptionsBase.ttl} is not set.
+         */
+        updateAgeOnHas?: boolean;
+        /**
+         * Allow {@link LRUCache#get} and {@link LRUCache#fetch} calls to return
+         * stale data, if available.
+         *
+         * By default, if you set `ttl`, stale items will only be deleted from the
+         * cache when you `get(key)`. That is, it's not preemptively pruning items,
+         * unless {@link OptionsBase.ttlAutopurge} is set.
+         *
+         * If you set `allowStale:true`, it'll return the stale value *as well as*
+         * deleting it. If you don't set this, then it'll return `undefined` when
+         * you try to get a stale entry.
+         *
+         * Note that when a stale entry is fetched, _even if it is returned due to
+         * `allowStale` being set_, it is removed from the cache immediately. You
+         * can suppress this behavior by setting
+         * {@link OptionsBase.noDeleteOnStaleGet}, either in the constructor, or in
+         * the options provided to {@link LRUCache#get}.
+         *
+         * This may be overridden by passing an options object to `cache.get()`.
+         * The `cache.has()` method will always return `false` for stale items.
+         *
+         * Only relevant if a ttl is set.
+         */
+        allowStale?: boolean;
+        /**
+         * Function that is called on items when they are dropped from the
+         * cache, as `dispose(value, key, reason)`.
+         *
+         * This can be handy if you want to close file descriptors or do
+         * other cleanup tasks when items are no longer stored in the cache.
+         *
+         * **NOTE**: It is called _before_ the item has been fully removed
+         * from the cache, so if you want to put it right back in, you need
+         * to wait until the next tick. If you try to add it back in during
+         * the `dispose()` function call, it will break things in subtle and
+         * weird ways.
+         *
+         * Unlike several other options, this may _not_ be overridden by
+         * passing an option to `set()`, for performance reasons.
+         *
+         * The `reason` will be one of the following strings, corresponding
+         * to the reason for the item's deletion:
+         *
+         * - `evict` Item was evicted to make space for a new addition
+         * - `set` Item was overwritten by a new value
+         * - `expire` Item expired its TTL
+         * - `fetch` Item was deleted due to a failed or aborted fetch, or a
+         *   fetchMethod returning `undefined.
+         * - `delete` Item was removed by explicit `cache.delete(key)`,
+         *   `cache.clear()`, or `cache.set(key, undefined)`.
+         */
+        dispose?: Disposer<K, V>;
+        /**
+         * The same as {@link OptionsBase.dispose}, but called *after* the entry
+         * is completely removed and the cache is once again in a clean state.
+         *
+         * It is safe to add an item right back into the cache at this point.
+         * However, note that it is *very* easy to inadvertently create infinite
+         * recursion this way.
+         */
+        disposeAfter?: Disposer<K, V>;
+        /**
+         * Set to true to suppress calling the
+         * {@link OptionsBase.dispose} function if the entry key is
+         * still accessible within the cache.
+         *
+         * This may be overridden by passing an options object to
+         * {@link LRUCache#set}.
+         *
+         * Only relevant if `dispose` or `disposeAfter` are set.
+         */
+        noDisposeOnSet?: boolean;
+        /**
+         * Boolean flag to tell the cache to not update the TTL when setting a new
+         * value for an existing key (ie, when updating a value rather than
+         * inserting a new value).  Note that the TTL value is _always_ set (if
+         * provided) when adding a new entry into the cache.
+         *
+         * Has no effect if a {@link OptionsBase.ttl} is not set.
+         *
+         * May be passed as an option to {@link LRUCache#set}.
+         */
+        noUpdateTTL?: boolean;
+        /**
+         * Set to a positive integer to track the sizes of items added to the
+         * cache, and automatically evict items in order to stay below this size.
+         * Note that this may result in fewer than `max` items being stored.
+         *
+         * Attempting to add an item to the cache whose calculated size is greater
+         * that this amount will be a no-op. The item will not be cached, and no
+         * other items will be evicted.
+         *
+         * Optional, must be a positive integer if provided.
+         *
+         * Sets `maxEntrySize` to the same value, unless a different value is
+         * provided for `maxEntrySize`.
+         *
+         * At least one of `max`, `maxSize`, or `TTL` is required. This must be a
+         * positive integer if set.
+         *
+         * Even if size tracking is enabled, **it is strongly recommended to set a
+         * `max` to prevent unbounded growth of the cache.**
+         *
+         * Note also that size tracking can negatively impact performance,
+         * though for most cases, only minimally.
+         */
+        maxSize?: Size;
+        /**
+         * The maximum allowed size for any single item in the cache.
+         *
+         * If a larger item is passed to {@link LRUCache#set} or returned by a
+         * {@link OptionsBase.fetchMethod} or {@link OptionsBase.memoMethod}, then
+         * it will not be stored in the cache.
+         *
+         * Attempting to add an item whose calculated size is greater than
+         * this amount will not cache the item or evict any old items, but
+         * WILL delete an existing value if one is already present.
+         *
+         * Optional, must be a positive integer if provided. Defaults to
+         * the value of `maxSize` if provided.
+         */
+        maxEntrySize?: Size;
+        /**
+         * A function that returns a number indicating the item's size.
+         *
+         * Requires {@link OptionsBase.maxSize} to be set.
+         *
+         * If not provided, and {@link OptionsBase.maxSize} or
+         * {@link OptionsBase.maxEntrySize} are set, then all
+         * {@link LRUCache#set} calls **must** provide an explicit
+         * {@link SetOptions.size} or sizeCalculation param.
+         */
+        sizeCalculation?: SizeCalculator<K, V>;
+        /**
+         * Method that provides the implementation for {@link LRUCache#fetch}
+         *
+         * ```ts
+         * fetchMethod(key, staleValue, { signal, options, context })
+         * ```
+         *
+         * If `fetchMethod` is not provided, then `cache.fetch(key)` is equivalent
+         * to `Promise.resolve(cache.get(key))`.
+         *
+         * If at any time, `signal.aborted` is set to `true`, or if the
+         * `signal.onabort` method is called, or if it emits an `'abort'` event
+         * which you can listen to with `addEventListener`, then that means that
+         * the fetch should be abandoned. This may be passed along to async
+         * functions aware of AbortController/AbortSignal behavior.
+         *
+         * The `fetchMethod` should **only** return `undefined` or a Promise
+         * resolving to `undefined` if the AbortController signaled an `abort`
+         * event. In all other cases, it should return or resolve to a value
+         * suitable for adding to the cache.
+         *
+         * The `options` object is a union of the options that may be provided to
+         * `set()` and `get()`. If they are modified, then that will result in
+         * modifying the settings to `cache.set()` when the value is resolved, and
+         * in the case of
+         * {@link OptionsBase.noDeleteOnFetchRejection} and
+         * {@link OptionsBase.allowStaleOnFetchRejection}, the handling of
+         * `fetchMethod` failures.
+         *
+         * For example, a DNS cache may update the TTL based on the value returned
+         * from a remote DNS server by changing `options.ttl` in the `fetchMethod`.
+         */
+        fetchMethod?: Fetcher<K, V, FC>;
+        /**
+         * Method that provides the implementation for {@link LRUCache#memo}
+         */
+        memoMethod?: Memoizer<K, V, FC>;
+        /**
+         * Set to true to suppress the deletion of stale data when a
+         * {@link OptionsBase.fetchMethod} returns a rejected promise.
+         */
+        noDeleteOnFetchRejection?: boolean;
+        /**
+         * Do not delete stale items when they are retrieved with
+         * {@link LRUCache#get}.
+         *
+         * Note that the `get` return value will still be `undefined`
+         * unless {@link OptionsBase.allowStale} is true.
+         *
+         * When using time-expiring entries with `ttl`, by default stale
+         * items will be removed from the cache when the key is accessed
+         * with `cache.get()`.
+         *
+         * Setting this option will cause stale items to remain in the cache, until
+         * they are explicitly deleted with `cache.delete(key)`, or retrieved with
+         * `noDeleteOnStaleGet` set to `false`.
+         *
+         * This may be overridden by passing an options object to `cache.get()`.
+         *
+         * Only relevant if a ttl is used.
+         */
+        noDeleteOnStaleGet?: boolean;
+        /**
+         * Set to true to allow returning stale data when a
+         * {@link OptionsBase.fetchMethod} throws an error or returns a rejected
+         * promise.
+         *
+         * This differs from using {@link OptionsBase.allowStale} in that stale
+         * data will ONLY be returned in the case that the {@link LRUCache#fetch}
+         * fails, not any other times.
+         *
+         * If a `fetchMethod` fails, and there is no stale value available, the
+         * `fetch()` will resolve to `undefined`. Ie, all `fetchMethod` errors are
+         * suppressed.
+         *
+         * Implies `noDeleteOnFetchRejection`.
+         *
+         * This may be set in calls to `fetch()`, or defaulted on the constructor,
+         * or overridden by modifying the options object in the `fetchMethod`.
+         */
+        allowStaleOnFetchRejection?: boolean;
+        /**
+         * Set to true to return a stale value from the cache when the
+         * `AbortSignal` passed to the {@link OptionsBase.fetchMethod} dispatches
+         * an `'abort'` event, whether user-triggered, or due to internal cache
+         * behavior.
+         *
+         * Unless {@link OptionsBase.ignoreFetchAbort} is also set, the underlying
+         * {@link OptionsBase.fetchMethod} will still be considered canceled, and
+         * any value it returns will be ignored and not cached.
+         *
+         * Caveat: since fetches are aborted when a new value is explicitly
+         * set in the cache, this can lead to fetch returning a stale value,
+         * since that was the fallback value _at the moment the `fetch()` was
+         * initiated_, even though the new updated value is now present in
+         * the cache.
+         *
+         * For example:
+         *
+         * ```ts
+         * const cache = new LRUCache<string, any>({
+         *   ttl: 100,
+         *   fetchMethod: async (url, oldValue, { signal }) =>  {
+         *     const res = await fetch(url, { signal })
+         *     return await res.json()
+         *   }
+         * })
+         * cache.set('https://example.com/', { some: 'data' })
+         * // 100ms go by...
+         * const result = cache.fetch('https://example.com/')
+         * cache.set('https://example.com/', { other: 'thing' })
+         * console.log(await result) // { some: 'data' }
+         * console.log(cache.get('https://example.com/')) // { other: 'thing' }
+         * ```
+         */
+        allowStaleOnFetchAbort?: boolean;
+        /**
+         * Set to true to ignore the `abort` event emitted by the `AbortSignal`
+         * object passed to {@link OptionsBase.fetchMethod}, and still cache the
+         * resulting resolution value, as long as it is not `undefined`.
+         *
+         * When used on its own, this means aborted {@link LRUCache#fetch} calls
+         * are not immediately resolved or rejected when they are aborted, and
+         * instead take the full time to await.
+         *
+         * When used with {@link OptionsBase.allowStaleOnFetchAbort}, aborted
+         * {@link LRUCache#fetch} calls will resolve immediately to their stale
+         * cached value or `undefined`, and will continue to process and eventually
+         * update the cache when they resolve, as long as the resulting value is
+         * not `undefined`, thus supporting a "return stale on timeout while
+         * refreshing" mechanism by passing `AbortSignal.timeout(n)` as the signal.
+         *
+         * For example:
+         *
+         * ```ts
+         * const c = new LRUCache({
+         *   ttl: 100,
+         *   ignoreFetchAbort: true,
+         *   allowStaleOnFetchAbort: true,
+         *   fetchMethod: async (key, oldValue, { signal }) => {
+         *     // note: do NOT pass the signal to fetch()!
+         *     // let's say this fetch can take a long time.
+         *     const res = await fetch(`https://slow-backend-server/${key}`)
+         *     return await res.json()
+         *   },
+         * })
+         *
+         * // this will return the stale value after 100ms, while still
+         * // updating in the background for next time.
+         * const val = await c.fetch('key', { signal: AbortSignal.timeout(100) })
+         * ```
+         *
+         * **Note**: regardless of this setting, an `abort` event _is still
+         * emitted on the `AbortSignal` object_, so may result in invalid results
+         * when passed to other underlying APIs that use AbortSignals.
+         *
+         * This may be overridden in the {@link OptionsBase.fetchMethod} or the
+         * call to {@link LRUCache#fetch}.
+         */
+        ignoreFetchAbort?: boolean;
+    }
+    interface OptionsMaxLimit<K, V, FC> extends OptionsBase<K, V, FC> {
+        max: Count;
+    }
+    interface OptionsTTLLimit<K, V, FC> extends OptionsBase<K, V, FC> {
+        ttl: Milliseconds;
+        ttlAutopurge: boolean;
+    }
+    interface OptionsSizeLimit<K, V, FC> extends OptionsBase<K, V, FC> {
+        maxSize: Size;
+    }
+    /**
+     * The valid safe options for the {@link LRUCache} constructor
+     */
+    type Options<K, V, FC> = OptionsMaxLimit<K, V, FC> | OptionsSizeLimit<K, V, FC> | OptionsTTLLimit<K, V, FC>;
+    /**
+     * Entry objects used by {@link LRUCache#load} and {@link LRUCache#dump},
+     * and returned by {@link LRUCache#info}.
+     */
+    interface Entry<V> {
+        value: V;
+        ttl?: Milliseconds;
+        size?: Size;
+        start?: Milliseconds;
+    }
+}
+/**
+ * Default export, the thing you're using this module to get.
+ *
+ * The `K` and `V` types define the key and value types, respectively. The
+ * optional `FC` type defines the type of the `context` object passed to
+ * `cache.fetch()` and `cache.memo()`.
+ *
+ * Keys and values **must not** be `null` or `undefined`.
+ *
+ * All properties from the options object (with the exception of `max`,
+ * `maxSize`, `fetchMethod`, `memoMethod`, `dispose` and `disposeAfter`) are
+ * added as normal public members. (The listed options are read-only getters.)
+ *
+ * Changing any of these will alter the defaults for subsequent method calls.
+ */
+export declare class LRUCache<K extends {}, V extends {}, FC = unknown> implements Map<K, V> {
+    #private;
+    /**
+     * {@link LRUCache.OptionsBase.ttl}
+     */
+    ttl: LRUCache.Milliseconds;
+    /**
+     * {@link LRUCache.OptionsBase.ttlResolution}
+     */
+    ttlResolution: LRUCache.Milliseconds;
+    /**
+     * {@link LRUCache.OptionsBase.ttlAutopurge}
+     */
+    ttlAutopurge: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.updateAgeOnGet}
+     */
+    updateAgeOnGet: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.updateAgeOnHas}
+     */
+    updateAgeOnHas: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.allowStale}
+     */
+    allowStale: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.noDisposeOnSet}
+     */
+    noDisposeOnSet: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.noUpdateTTL}
+     */
+    noUpdateTTL: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.maxEntrySize}
+     */
+    maxEntrySize: LRUCache.Size;
+    /**
+     * {@link LRUCache.OptionsBase.sizeCalculation}
+     */
+    sizeCalculation?: LRUCache.SizeCalculator<K, V>;
+    /**
+     * {@link LRUCache.OptionsBase.noDeleteOnFetchRejection}
+     */
+    noDeleteOnFetchRejection: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.noDeleteOnStaleGet}
+     */
+    noDeleteOnStaleGet: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort}
+     */
+    allowStaleOnFetchAbort: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.allowStaleOnFetchRejection}
+     */
+    allowStaleOnFetchRejection: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.ignoreFetchAbort}
+     */
+    ignoreFetchAbort: boolean;
+    /**
+     * Do not call this method unless you need to inspect the
+     * inner workings of the cache.  If anything returned by this
+     * object is modified in any way, strange breakage may occur.
+     *
+     * These fields are private for a reason!
+     *
+     * @internal
+     */
+    static unsafeExposeInternals<K extends {}, V extends {}, FC extends unknown = unknown>(c: LRUCache<K, V, FC>): {
+        starts: ZeroArray | undefined;
+        ttls: ZeroArray | undefined;
+        sizes: ZeroArray | undefined;
+        keyMap: Map<K, number>;
+        keyList: (K | undefined)[];
+        valList: (V | BackgroundFetch<V> | undefined)[];
+        next: NumberArray;
+        prev: NumberArray;
+        readonly head: Index;
+        readonly tail: Index;
+        free: StackLike;
+        isBackgroundFetch: (p: any) => boolean;
+        backgroundFetch: (k: K, index: number | undefined, options: LRUCache.FetchOptions<K, V, FC>, context: any) => BackgroundFetch<V>;
+        moveToTail: (index: number) => void;
+        indexes: (options?: {
+            allowStale: boolean;
+        }) => Generator<Index, void, unknown>;
+        rindexes: (options?: {
+            allowStale: boolean;
+        }) => Generator<Index, void, unknown>;
+        isStale: (index: number | undefined) => boolean;
+    };
+    /**
+     * {@link LRUCache.OptionsBase.max} (read-only)
+     */
+    get max(): LRUCache.Count;
+    /**
+     * {@link LRUCache.OptionsBase.maxSize} (read-only)
+     */
+    get maxSize(): LRUCache.Count;
+    /**
+     * The total computed size of items in the cache (read-only)
+     */
+    get calculatedSize(): LRUCache.Size;
+    /**
+     * The number of items stored in the cache (read-only)
+     */
+    get size(): LRUCache.Count;
+    /**
+     * {@link LRUCache.OptionsBase.fetchMethod} (read-only)
+     */
+    get fetchMethod(): LRUCache.Fetcher<K, V, FC> | undefined;
+    get memoMethod(): LRUCache.Memoizer<K, V, FC> | undefined;
+    /**
+     * {@link LRUCache.OptionsBase.dispose} (read-only)
+     */
+    get dispose(): LRUCache.Disposer<K, V> | undefined;
+    /**
+     * {@link LRUCache.OptionsBase.disposeAfter} (read-only)
+     */
+    get disposeAfter(): LRUCache.Disposer<K, V> | undefined;
+    constructor(options: LRUCache.Options<K, V, FC> | LRUCache<K, V, FC>);
+    /**
+     * Return the number of ms left in the item's TTL. If item is not in cache,
+     * returns `0`. Returns `Infinity` if item is in cache without a defined TTL.
+     */
+    getRemainingTTL(key: K): number;
+    /**
+     * Return a generator yielding `[key, value]` pairs,
+     * in order from most recently used to least recently used.
+     */
+    entries(): Generator<[K, V], void, unknown>;
+    /**
+     * Inverse order version of {@link LRUCache.entries}
+     *
+     * Return a generator yielding `[key, value]` pairs,
+     * in order from least recently used to most recently used.
+     */
+    rentries(): Generator<(K | V | BackgroundFetch<V> | undefined)[], void, unknown>;
+    /**
+     * Return a generator yielding the keys in the cache,
+     * in order from most recently used to least recently used.
+     */
+    keys(): Generator<K, void, unknown>;
+    /**
+     * Inverse order version of {@link LRUCache.keys}
+     *
+     * Return a generator yielding the keys in the cache,
+     * in order from least recently used to most recently used.
+     */
+    rkeys(): Generator<K, void, unknown>;
+    /**
+     * Return a generator yielding the values in the cache,
+     * in order from most recently used to least recently used.
+     */
+    values(): Generator<V, void, unknown>;
+    /**
+     * Inverse order version of {@link LRUCache.values}
+     *
+     * Return a generator yielding the values in the cache,
+     * in order from least recently used to most recently used.
+     */
+    rvalues(): Generator<V | BackgroundFetch<V> | undefined, void, unknown>;
+    /**
+     * Iterating over the cache itself yields the same results as
+     * {@link LRUCache.entries}
+     */
+    [Symbol.iterator](): Generator<[K, V], void, unknown>;
+    /**
+     * A String value that is used in the creation of the default string
+     * description of an object. Called by the built-in method
+     * `Object.prototype.toString`.
+     */
+    [Symbol.toStringTag]: string;
+    /**
+     * Find a value for which the supplied fn method returns a truthy value,
+     * similar to `Array.find()`. fn is called as `fn(value, key, cache)`.
+     */
+    find(fn: (v: V, k: K, self: LRUCache<K, V, FC>) => boolean, getOptions?: LRUCache.GetOptions<K, V, FC>): V | undefined;
+    /**
+     * Call the supplied function on each item in the cache, in order from most
+     * recently used to least recently used.
+     *
+     * `fn` is called as `fn(value, key, cache)`.
+     *
+     * If `thisp` is provided, function will be called in the `this`-context of
+     * the provided object, or the cache if no `thisp` object is provided.
+     *
+     * Does not update age or recenty of use, or iterate over stale values.
+     */
+    forEach(fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any, thisp?: any): void;
+    /**
+     * The same as {@link LRUCache.forEach} but items are iterated over in
+     * reverse order.  (ie, less recently used items are iterated over first.)
+     */
+    rforEach(fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any, thisp?: any): void;
+    /**
+     * Delete any stale entries. Returns true if anything was removed,
+     * false otherwise.
+     */
+    purgeStale(): boolean;
+    /**
+     * Get the extended info about a given entry, to get its value, size, and
+     * TTL info simultaneously. Returns `undefined` if the key is not present.
+     *
+     * Unlike {@link LRUCache#dump}, which is designed to be portable and survive
+     * serialization, the `start` value is always the current timestamp, and the
+     * `ttl` is a calculated remaining time to live (negative if expired).
+     *
+     * Always returns stale values, if their info is found in the cache, so be
+     * sure to check for expirations (ie, a negative {@link LRUCache.Entry#ttl})
+     * if relevant.
+     */
+    info(key: K): LRUCache.Entry<V> | undefined;
+    /**
+     * Return an array of [key, {@link LRUCache.Entry}] tuples which can be
+     * passed to {@link LRLUCache#load}.
+     *
+     * The `start` fields are calculated relative to a portable `Date.now()`
+     * timestamp, even if `performance.now()` is available.
+     *
+     * Stale entries are always included in the `dump`, even if
+     * {@link LRUCache.OptionsBase.allowStale} is false.
+     *
+     * Note: this returns an actual array, not a generator, so it can be more
+     * easily passed around.
+     */
+    dump(): [K, LRUCache.Entry<V>][];
+    /**
+     * Reset the cache and load in the items in entries in the order listed.
+     *
+     * The shape of the resulting cache may be different if the same options are
+     * not used in both caches.
+     *
+     * The `start` fields are assumed to be calculated relative to a portable
+     * `Date.now()` timestamp, even if `performance.now()` is available.
+     */
+    load(arr: [K, LRUCache.Entry<V>][]): void;
+    /**
+     * Add a value to the cache.
+     *
+     * Note: if `undefined` is specified as a value, this is an alias for
+     * {@link LRUCache#delete}
+     *
+     * Fields on the {@link LRUCache.SetOptions} options param will override
+     * their corresponding values in the constructor options for the scope
+     * of this single `set()` operation.
+     *
+     * If `start` is provided, then that will set the effective start
+     * time for the TTL calculation. Note that this must be a previous
+     * value of `performance.now()` if supported, or a previous value of
+     * `Date.now()` if not.
+     *
+     * Options object may also include `size`, which will prevent
+     * calling the `sizeCalculation` function and just use the specified
+     * number if it is a positive integer, and `noDisposeOnSet` which
+     * will prevent calling a `dispose` function in the case of
+     * overwrites.
+     *
+     * If the `size` (or return value of `sizeCalculation`) for a given
+     * entry is greater than `maxEntrySize`, then the item will not be
+     * added to the cache.
+     *
+     * Will update the recency of the entry.
+     *
+     * If the value is `undefined`, then this is an alias for
+     * `cache.delete(key)`. `undefined` is never stored in the cache.
+     */
+    set(k: K, v: V | BackgroundFetch<V> | undefined, setOptions?: LRUCache.SetOptions<K, V, FC>): this;
+    /**
+     * Evict the least recently used item, returning its value or
+     * `undefined` if cache is empty.
+     */
+    pop(): V | undefined;
+    /**
+     * Check if a key is in the cache, without updating the recency of use.
+     * Will return false if the item is stale, even though it is technically
+     * in the cache.
+     *
+     * Check if a key is in the cache, without updating the recency of
+     * use. Age is updated if {@link LRUCache.OptionsBase.updateAgeOnHas} is set
+     * to `true` in either the options or the constructor.
+     *
+     * Will return `false` if the item is stale, even though it is technically in
+     * the cache. The difference can be determined (if it matters) by using a
+     * `status` argument, and inspecting the `has` field.
+     *
+     * Will not update item age unless
+     * {@link LRUCache.OptionsBase.updateAgeOnHas} is set.
+     */
+    has(k: K, hasOptions?: LRUCache.HasOptions<K, V, FC>): boolean;
+    /**
+     * Like {@link LRUCache#get} but doesn't update recency or delete stale
+     * items.
+     *
+     * Returns `undefined` if the item is stale, unless
+     * {@link LRUCache.OptionsBase.allowStale} is set.
+     */
+    peek(k: K, peekOptions?: LRUCache.PeekOptions<K, V, FC>): V | undefined;
+    /**
+     * Make an asynchronous cached fetch using the
+     * {@link LRUCache.OptionsBase.fetchMethod} function.
+     *
+     * If the value is in the cache and not stale, then the returned
+     * Promise resolves to the value.
+     *
+     * If not in the cache, or beyond its TTL staleness, then
+     * `fetchMethod(key, staleValue, { options, signal, context })` is
+     * called, and the value returned will be added to the cache once
+     * resolved.
+     *
+     * If called with `allowStale`, and an asynchronous fetch is
+     * currently in progress to reload a stale value, then the former
+     * stale value will be returned.
+     *
+     * If called with `forceRefresh`, then the cached item will be
+     * re-fetched, even if it is not stale. However, if `allowStale` is also
+     * set, then the old value will still be returned. This is useful
+     * in cases where you want to force a reload of a cached value. If
+     * a background fetch is already in progress, then `forceRefresh`
+     * has no effect.
+     *
+     * If multiple fetches for the same key are issued, then they will all be
+     * coalesced into a single call to fetchMethod.
+     *
+     * Note that this means that handling options such as
+     * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort},
+     * {@link LRUCache.FetchOptions.signal},
+     * and {@link LRUCache.OptionsBase.allowStaleOnFetchRejection} will be
+     * determined by the FIRST fetch() call for a given key.
+     *
+     * This is a known (fixable) shortcoming which will be addresed on when
+     * someone complains about it, as the fix would involve added complexity and
+     * may not be worth the costs for this edge case.
+     *
+     * If {@link LRUCache.OptionsBase.fetchMethod} is not specified, then this is
+     * effectively an alias for `Promise.resolve(cache.get(key))`.
+     *
+     * When the fetch method resolves to a value, if the fetch has not
+     * been aborted due to deletion, eviction, or being overwritten,
+     * then it is added to the cache using the options provided.
+     *
+     * If the key is evicted or deleted before the `fetchMethod`
+     * resolves, then the AbortSignal passed to the `fetchMethod` will
+     * receive an `abort` event, and the promise returned by `fetch()`
+     * will reject with the reason for the abort.
+     *
+     * If a `signal` is passed to the `fetch()` call, then aborting the
+     * signal will abort the fetch and cause the `fetch()` promise to
+     * reject with the reason provided.
+     *
+     * **Setting `context`**
+     *
+     * If an `FC` type is set to a type other than `unknown`, `void`, or
+     * `undefined` in the {@link LRUCache} constructor, then all
+     * calls to `cache.fetch()` _must_ provide a `context` option. If
+     * set to `undefined` or `void`, then calls to fetch _must not_
+     * provide a `context` option.
+     *
+     * The `context` param allows you to provide arbitrary data that
+     * might be relevant in the course of fetching the data. It is only
+     * relevant for the course of a single `fetch()` operation, and
+     * discarded afterwards.
+     *
+     * **Note: `fetch()` calls are inflight-unique**
+     *
+     * If you call `fetch()` multiple times with the same key value,
+     * then every call after the first will resolve on the same
+     * promise<sup>1</sup>,
+     * _even if they have different settings that would otherwise change
+     * the behavior of the fetch_, such as `noDeleteOnFetchRejection`
+     * or `ignoreFetchAbort`.
+     *
+     * In most cases, this is not a problem (in fact, only fetching
+     * something once is what you probably want, if you're caching in
+     * the first place). If you are changing the fetch() options
+     * dramatically between runs, there's a good chance that you might
+     * be trying to fit divergent semantics into a single object, and
+     * would be better off with multiple cache instances.
+     *
+     * **1**: Ie, they're not the "same Promise", but they resolve at
+     * the same time, because they're both waiting on the same
+     * underlying fetchMethod response.
+     */
+    fetch(k: K, fetchOptions: unknown extends FC ? LRUCache.FetchOptions<K, V, FC> : FC extends undefined | void ? LRUCache.FetchOptionsNoContext<K, V> : LRUCache.FetchOptionsWithContext<K, V, FC>): Promise<undefined | V>;
+    fetch(k: unknown extends FC ? K : FC extends undefined | void ? K : never, fetchOptions?: unknown extends FC ? LRUCache.FetchOptions<K, V, FC> : FC extends undefined | void ? LRUCache.FetchOptionsNoContext<K, V> : never): Promise<undefined | V>;
+    /**
+     * In some cases, `cache.fetch()` may resolve to `undefined`, either because
+     * a {@link LRUCache.OptionsBase#fetchMethod} was not provided (turning
+     * `cache.fetch(k)` into just an async wrapper around `cache.get(k)`) or
+     * because `ignoreFetchAbort` was specified (either to the constructor or
+     * in the {@link LRUCache.FetchOptions}). Also, the
+     * {@link OptionsBase.fetchMethod} may return `undefined` or `void`, making
+     * the test even more complicated.
+     *
+     * Because inferring the cases where `undefined` might be returned are so
+     * cumbersome, but testing for `undefined` can also be annoying, this method
+     * can be used, which will reject if `this.fetch()` resolves to undefined.
+     */
+    forceFetch(k: K, fetchOptions: unknown extends FC ? LRUCache.FetchOptions<K, V, FC> : FC extends undefined | void ? LRUCache.FetchOptionsNoContext<K, V> : LRUCache.FetchOptionsWithContext<K, V, FC>): Promise<V>;
+    forceFetch(k: unknown extends FC ? K : FC extends undefined | void ? K : never, fetchOptions?: unknown extends FC ? LRUCache.FetchOptions<K, V, FC> : FC extends undefined | void ? LRUCache.FetchOptionsNoContext<K, V> : never): Promise<V>;
+    /**
+     * If the key is found in the cache, then this is equivalent to
+     * {@link LRUCache#get}. If not, in the cache, then calculate the value using
+     * the {@link LRUCache.OptionsBase.memoMethod}, and add it to the cache.
+     *
+     * If an `FC` type is set to a type other than `unknown`, `void`, or
+     * `undefined` in the LRUCache constructor, then all calls to `cache.memo()`
+     * _must_ provide a `context` option. If set to `undefined` or `void`, then
+     * calls to memo _must not_ provide a `context` option.
+     *
+     * The `context` param allows you to provide arbitrary data that might be
+     * relevant in the course of fetching the data. It is only relevant for the
+     * course of a single `memo()` operation, and discarded afterwards.
+     */
+    memo(k: K, memoOptions: unknown extends FC ? LRUCache.MemoOptions<K, V, FC> : FC extends undefined | void ? LRUCache.MemoOptionsNoContext<K, V> : LRUCache.MemoOptionsWithContext<K, V, FC>): V;
+    memo(k: unknown extends FC ? K : FC extends undefined | void ? K : never, memoOptions?: unknown extends FC ? LRUCache.MemoOptions<K, V, FC> : FC extends undefined | void ? LRUCache.MemoOptionsNoContext<K, V> : never): V;
+    /**
+     * Return a value from the cache. Will update the recency of the cache
+     * entry found.
+     *
+     * If the key is not found, get() will return `undefined`.
+     */
+    get(k: K, getOptions?: LRUCache.GetOptions<K, V, FC>): V | undefined;
+    /**
+     * Deletes a key out of the cache.
+     *
+     * Returns true if the key was deleted, false otherwise.
+     */
+    delete(k: K): boolean;
+    /**
+     * Clear the cache entirely, throwing away all values.
+     */
+    clear(): void;
+}
+//# sourceMappingURL=index.d.ts.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.d.ts.map b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.d.ts.map
new file mode 100644
index 0000000..34d60c5
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.d.ts.map
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.js b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.js
new file mode 100644
index 0000000..0589231
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.js
@@ -0,0 +1,1546 @@
+"use strict";
+/**
+ * @module LRUCache
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.LRUCache = void 0;
+const perf = typeof performance === 'object' &&
+    performance &&
+    typeof performance.now === 'function'
+    ? performance
+    : Date;
+const warned = new Set();
+/* c8 ignore start */
+const PROCESS = (typeof process === 'object' && !!process ? process : {});
+/* c8 ignore start */
+const emitWarning = (msg, type, code, fn) => {
+    typeof PROCESS.emitWarning === 'function'
+        ? PROCESS.emitWarning(msg, type, code, fn)
+        : console.error(`[${code}] ${type}: ${msg}`);
+};
+let AC = globalThis.AbortController;
+let AS = globalThis.AbortSignal;
+/* c8 ignore start */
+if (typeof AC === 'undefined') {
+    //@ts-ignore
+    AS = class AbortSignal {
+        onabort;
+        _onabort = [];
+        reason;
+        aborted = false;
+        addEventListener(_, fn) {
+            this._onabort.push(fn);
+        }
+    };
+    //@ts-ignore
+    AC = class AbortController {
+        constructor() {
+            warnACPolyfill();
+        }
+        signal = new AS();
+        abort(reason) {
+            if (this.signal.aborted)
+                return;
+            //@ts-ignore
+            this.signal.reason = reason;
+            //@ts-ignore
+            this.signal.aborted = true;
+            //@ts-ignore
+            for (const fn of this.signal._onabort) {
+                fn(reason);
+            }
+            this.signal.onabort?.(reason);
+        }
+    };
+    let printACPolyfillWarning = PROCESS.env?.LRU_CACHE_IGNORE_AC_WARNING !== '1';
+    const warnACPolyfill = () => {
+        if (!printACPolyfillWarning)
+            return;
+        printACPolyfillWarning = false;
+        emitWarning('AbortController is not defined. If using lru-cache in ' +
+            'node 14, load an AbortController polyfill from the ' +
+            '`node-abort-controller` package. A minimal polyfill is ' +
+            'provided for use by LRUCache.fetch(), but it should not be ' +
+            'relied upon in other contexts (eg, passing it to other APIs that ' +
+            'use AbortController/AbortSignal might have undesirable effects). ' +
+            'You may disable this with LRU_CACHE_IGNORE_AC_WARNING=1 in the env.', 'NO_ABORT_CONTROLLER', 'ENOTSUP', warnACPolyfill);
+    };
+}
+/* c8 ignore stop */
+const shouldWarn = (code) => !warned.has(code);
+const TYPE = Symbol('type');
+const isPosInt = (n) => n && n === Math.floor(n) && n > 0 && isFinite(n);
+/* c8 ignore start */
+// This is a little bit ridiculous, tbh.
+// The maximum array length is 2^32-1 or thereabouts on most JS impls.
+// And well before that point, you're caching the entire world, I mean,
+// that's ~32GB of just integers for the next/prev links, plus whatever
+// else to hold that many keys and values.  Just filling the memory with
+// zeroes at init time is brutal when you get that big.
+// But why not be complete?
+// Maybe in the future, these limits will have expanded.
+const getUintArray = (max) => !isPosInt(max)
+    ? null
+    : max <= Math.pow(2, 8)
+        ? Uint8Array
+        : max <= Math.pow(2, 16)
+            ? Uint16Array
+            : max <= Math.pow(2, 32)
+                ? Uint32Array
+                : max <= Number.MAX_SAFE_INTEGER
+                    ? ZeroArray
+                    : null;
+/* c8 ignore stop */
+class ZeroArray extends Array {
+    constructor(size) {
+        super(size);
+        this.fill(0);
+    }
+}
+class Stack {
+    heap;
+    length;
+    // private constructor
+    static #constructing = false;
+    static create(max) {
+        const HeapCls = getUintArray(max);
+        if (!HeapCls)
+            return [];
+        Stack.#constructing = true;
+        const s = new Stack(max, HeapCls);
+        Stack.#constructing = false;
+        return s;
+    }
+    constructor(max, HeapCls) {
+        /* c8 ignore start */
+        if (!Stack.#constructing) {
+            throw new TypeError('instantiate Stack using Stack.create(n)');
+        }
+        /* c8 ignore stop */
+        this.heap = new HeapCls(max);
+        this.length = 0;
+    }
+    push(n) {
+        this.heap[this.length++] = n;
+    }
+    pop() {
+        return this.heap[--this.length];
+    }
+}
+/**
+ * Default export, the thing you're using this module to get.
+ *
+ * The `K` and `V` types define the key and value types, respectively. The
+ * optional `FC` type defines the type of the `context` object passed to
+ * `cache.fetch()` and `cache.memo()`.
+ *
+ * Keys and values **must not** be `null` or `undefined`.
+ *
+ * All properties from the options object (with the exception of `max`,
+ * `maxSize`, `fetchMethod`, `memoMethod`, `dispose` and `disposeAfter`) are
+ * added as normal public members. (The listed options are read-only getters.)
+ *
+ * Changing any of these will alter the defaults for subsequent method calls.
+ */
+class LRUCache {
+    // options that cannot be changed without disaster
+    #max;
+    #maxSize;
+    #dispose;
+    #disposeAfter;
+    #fetchMethod;
+    #memoMethod;
+    /**
+     * {@link LRUCache.OptionsBase.ttl}
+     */
+    ttl;
+    /**
+     * {@link LRUCache.OptionsBase.ttlResolution}
+     */
+    ttlResolution;
+    /**
+     * {@link LRUCache.OptionsBase.ttlAutopurge}
+     */
+    ttlAutopurge;
+    /**
+     * {@link LRUCache.OptionsBase.updateAgeOnGet}
+     */
+    updateAgeOnGet;
+    /**
+     * {@link LRUCache.OptionsBase.updateAgeOnHas}
+     */
+    updateAgeOnHas;
+    /**
+     * {@link LRUCache.OptionsBase.allowStale}
+     */
+    allowStale;
+    /**
+     * {@link LRUCache.OptionsBase.noDisposeOnSet}
+     */
+    noDisposeOnSet;
+    /**
+     * {@link LRUCache.OptionsBase.noUpdateTTL}
+     */
+    noUpdateTTL;
+    /**
+     * {@link LRUCache.OptionsBase.maxEntrySize}
+     */
+    maxEntrySize;
+    /**
+     * {@link LRUCache.OptionsBase.sizeCalculation}
+     */
+    sizeCalculation;
+    /**
+     * {@link LRUCache.OptionsBase.noDeleteOnFetchRejection}
+     */
+    noDeleteOnFetchRejection;
+    /**
+     * {@link LRUCache.OptionsBase.noDeleteOnStaleGet}
+     */
+    noDeleteOnStaleGet;
+    /**
+     * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort}
+     */
+    allowStaleOnFetchAbort;
+    /**
+     * {@link LRUCache.OptionsBase.allowStaleOnFetchRejection}
+     */
+    allowStaleOnFetchRejection;
+    /**
+     * {@link LRUCache.OptionsBase.ignoreFetchAbort}
+     */
+    ignoreFetchAbort;
+    // computed properties
+    #size;
+    #calculatedSize;
+    #keyMap;
+    #keyList;
+    #valList;
+    #next;
+    #prev;
+    #head;
+    #tail;
+    #free;
+    #disposed;
+    #sizes;
+    #starts;
+    #ttls;
+    #hasDispose;
+    #hasFetchMethod;
+    #hasDisposeAfter;
+    /**
+     * Do not call this method unless you need to inspect the
+     * inner workings of the cache.  If anything returned by this
+     * object is modified in any way, strange breakage may occur.
+     *
+     * These fields are private for a reason!
+     *
+     * @internal
+     */
+    static unsafeExposeInternals(c) {
+        return {
+            // properties
+            starts: c.#starts,
+            ttls: c.#ttls,
+            sizes: c.#sizes,
+            keyMap: c.#keyMap,
+            keyList: c.#keyList,
+            valList: c.#valList,
+            next: c.#next,
+            prev: c.#prev,
+            get head() {
+                return c.#head;
+            },
+            get tail() {
+                return c.#tail;
+            },
+            free: c.#free,
+            // methods
+            isBackgroundFetch: (p) => c.#isBackgroundFetch(p),
+            backgroundFetch: (k, index, options, context) => c.#backgroundFetch(k, index, options, context),
+            moveToTail: (index) => c.#moveToTail(index),
+            indexes: (options) => c.#indexes(options),
+            rindexes: (options) => c.#rindexes(options),
+            isStale: (index) => c.#isStale(index),
+        };
+    }
+    // Protected read-only members
+    /**
+     * {@link LRUCache.OptionsBase.max} (read-only)
+     */
+    get max() {
+        return this.#max;
+    }
+    /**
+     * {@link LRUCache.OptionsBase.maxSize} (read-only)
+     */
+    get maxSize() {
+        return this.#maxSize;
+    }
+    /**
+     * The total computed size of items in the cache (read-only)
+     */
+    get calculatedSize() {
+        return this.#calculatedSize;
+    }
+    /**
+     * The number of items stored in the cache (read-only)
+     */
+    get size() {
+        return this.#size;
+    }
+    /**
+     * {@link LRUCache.OptionsBase.fetchMethod} (read-only)
+     */
+    get fetchMethod() {
+        return this.#fetchMethod;
+    }
+    get memoMethod() {
+        return this.#memoMethod;
+    }
+    /**
+     * {@link LRUCache.OptionsBase.dispose} (read-only)
+     */
+    get dispose() {
+        return this.#dispose;
+    }
+    /**
+     * {@link LRUCache.OptionsBase.disposeAfter} (read-only)
+     */
+    get disposeAfter() {
+        return this.#disposeAfter;
+    }
+    constructor(options) {
+        const { max = 0, ttl, ttlResolution = 1, ttlAutopurge, updateAgeOnGet, updateAgeOnHas, allowStale, dispose, disposeAfter, noDisposeOnSet, noUpdateTTL, maxSize = 0, maxEntrySize = 0, sizeCalculation, fetchMethod, memoMethod, noDeleteOnFetchRejection, noDeleteOnStaleGet, allowStaleOnFetchRejection, allowStaleOnFetchAbort, ignoreFetchAbort, } = options;
+        if (max !== 0 && !isPosInt(max)) {
+            throw new TypeError('max option must be a nonnegative integer');
+        }
+        const UintArray = max ? getUintArray(max) : Array;
+        if (!UintArray) {
+            throw new Error('invalid max value: ' + max);
+        }
+        this.#max = max;
+        this.#maxSize = maxSize;
+        this.maxEntrySize = maxEntrySize || this.#maxSize;
+        this.sizeCalculation = sizeCalculation;
+        if (this.sizeCalculation) {
+            if (!this.#maxSize && !this.maxEntrySize) {
+                throw new TypeError('cannot set sizeCalculation without setting maxSize or maxEntrySize');
+            }
+            if (typeof this.sizeCalculation !== 'function') {
+                throw new TypeError('sizeCalculation set to non-function');
+            }
+        }
+        if (memoMethod !== undefined &&
+            typeof memoMethod !== 'function') {
+            throw new TypeError('memoMethod must be a function if defined');
+        }
+        this.#memoMethod = memoMethod;
+        if (fetchMethod !== undefined &&
+            typeof fetchMethod !== 'function') {
+            throw new TypeError('fetchMethod must be a function if specified');
+        }
+        this.#fetchMethod = fetchMethod;
+        this.#hasFetchMethod = !!fetchMethod;
+        this.#keyMap = new Map();
+        this.#keyList = new Array(max).fill(undefined);
+        this.#valList = new Array(max).fill(undefined);
+        this.#next = new UintArray(max);
+        this.#prev = new UintArray(max);
+        this.#head = 0;
+        this.#tail = 0;
+        this.#free = Stack.create(max);
+        this.#size = 0;
+        this.#calculatedSize = 0;
+        if (typeof dispose === 'function') {
+            this.#dispose = dispose;
+        }
+        if (typeof disposeAfter === 'function') {
+            this.#disposeAfter = disposeAfter;
+            this.#disposed = [];
+        }
+        else {
+            this.#disposeAfter = undefined;
+            this.#disposed = undefined;
+        }
+        this.#hasDispose = !!this.#dispose;
+        this.#hasDisposeAfter = !!this.#disposeAfter;
+        this.noDisposeOnSet = !!noDisposeOnSet;
+        this.noUpdateTTL = !!noUpdateTTL;
+        this.noDeleteOnFetchRejection = !!noDeleteOnFetchRejection;
+        this.allowStaleOnFetchRejection = !!allowStaleOnFetchRejection;
+        this.allowStaleOnFetchAbort = !!allowStaleOnFetchAbort;
+        this.ignoreFetchAbort = !!ignoreFetchAbort;
+        // NB: maxEntrySize is set to maxSize if it's set
+        if (this.maxEntrySize !== 0) {
+            if (this.#maxSize !== 0) {
+                if (!isPosInt(this.#maxSize)) {
+                    throw new TypeError('maxSize must be a positive integer if specified');
+                }
+            }
+            if (!isPosInt(this.maxEntrySize)) {
+                throw new TypeError('maxEntrySize must be a positive integer if specified');
+            }
+            this.#initializeSizeTracking();
+        }
+        this.allowStale = !!allowStale;
+        this.noDeleteOnStaleGet = !!noDeleteOnStaleGet;
+        this.updateAgeOnGet = !!updateAgeOnGet;
+        this.updateAgeOnHas = !!updateAgeOnHas;
+        this.ttlResolution =
+            isPosInt(ttlResolution) || ttlResolution === 0
+                ? ttlResolution
+                : 1;
+        this.ttlAutopurge = !!ttlAutopurge;
+        this.ttl = ttl || 0;
+        if (this.ttl) {
+            if (!isPosInt(this.ttl)) {
+                throw new TypeError('ttl must be a positive integer if specified');
+            }
+            this.#initializeTTLTracking();
+        }
+        // do not allow completely unbounded caches
+        if (this.#max === 0 && this.ttl === 0 && this.#maxSize === 0) {
+            throw new TypeError('At least one of max, maxSize, or ttl is required');
+        }
+        if (!this.ttlAutopurge && !this.#max && !this.#maxSize) {
+            const code = 'LRU_CACHE_UNBOUNDED';
+            if (shouldWarn(code)) {
+                warned.add(code);
+                const msg = 'TTL caching without ttlAutopurge, max, or maxSize can ' +
+                    'result in unbounded memory consumption.';
+                emitWarning(msg, 'UnboundedCacheWarning', code, LRUCache);
+            }
+        }
+    }
+    /**
+     * Return the number of ms left in the item's TTL. If item is not in cache,
+     * returns `0`. Returns `Infinity` if item is in cache without a defined TTL.
+     */
+    getRemainingTTL(key) {
+        return this.#keyMap.has(key) ? Infinity : 0;
+    }
+    #initializeTTLTracking() {
+        const ttls = new ZeroArray(this.#max);
+        const starts = new ZeroArray(this.#max);
+        this.#ttls = ttls;
+        this.#starts = starts;
+        this.#setItemTTL = (index, ttl, start = perf.now()) => {
+            starts[index] = ttl !== 0 ? start : 0;
+            ttls[index] = ttl;
+            if (ttl !== 0 && this.ttlAutopurge) {
+                const t = setTimeout(() => {
+                    if (this.#isStale(index)) {
+                        this.#delete(this.#keyList[index], 'expire');
+                    }
+                }, ttl + 1);
+                // unref() not supported on all platforms
+                /* c8 ignore start */
+                if (t.unref) {
+                    t.unref();
+                }
+                /* c8 ignore stop */
+            }
+        };
+        this.#updateItemAge = index => {
+            starts[index] = ttls[index] !== 0 ? perf.now() : 0;
+        };
+        this.#statusTTL = (status, index) => {
+            if (ttls[index]) {
+                const ttl = ttls[index];
+                const start = starts[index];
+                /* c8 ignore next */
+                if (!ttl || !start)
+                    return;
+                status.ttl = ttl;
+                status.start = start;
+                status.now = cachedNow || getNow();
+                const age = status.now - start;
+                status.remainingTTL = ttl - age;
+            }
+        };
+        // debounce calls to perf.now() to 1s so we're not hitting
+        // that costly call repeatedly.
+        let cachedNow = 0;
+        const getNow = () => {
+            const n = perf.now();
+            if (this.ttlResolution > 0) {
+                cachedNow = n;
+                const t = setTimeout(() => (cachedNow = 0), this.ttlResolution);
+                // not available on all platforms
+                /* c8 ignore start */
+                if (t.unref) {
+                    t.unref();
+                }
+                /* c8 ignore stop */
+            }
+            return n;
+        };
+        this.getRemainingTTL = key => {
+            const index = this.#keyMap.get(key);
+            if (index === undefined) {
+                return 0;
+            }
+            const ttl = ttls[index];
+            const start = starts[index];
+            if (!ttl || !start) {
+                return Infinity;
+            }
+            const age = (cachedNow || getNow()) - start;
+            return ttl - age;
+        };
+        this.#isStale = index => {
+            const s = starts[index];
+            const t = ttls[index];
+            return !!t && !!s && (cachedNow || getNow()) - s > t;
+        };
+    }
+    // conditionally set private methods related to TTL
+    #updateItemAge = () => { };
+    #statusTTL = () => { };
+    #setItemTTL = () => { };
+    /* c8 ignore stop */
+    #isStale = () => false;
+    #initializeSizeTracking() {
+        const sizes = new ZeroArray(this.#max);
+        this.#calculatedSize = 0;
+        this.#sizes = sizes;
+        this.#removeItemSize = index => {
+            this.#calculatedSize -= sizes[index];
+            sizes[index] = 0;
+        };
+        this.#requireSize = (k, v, size, sizeCalculation) => {
+            // provisionally accept background fetches.
+            // actual value size will be checked when they return.
+            if (this.#isBackgroundFetch(v)) {
+                return 0;
+            }
+            if (!isPosInt(size)) {
+                if (sizeCalculation) {
+                    if (typeof sizeCalculation !== 'function') {
+                        throw new TypeError('sizeCalculation must be a function');
+                    }
+                    size = sizeCalculation(v, k);
+                    if (!isPosInt(size)) {
+                        throw new TypeError('sizeCalculation return invalid (expect positive integer)');
+                    }
+                }
+                else {
+                    throw new TypeError('invalid size value (must be positive integer). ' +
+                        'When maxSize or maxEntrySize is used, sizeCalculation ' +
+                        'or size must be set.');
+                }
+            }
+            return size;
+        };
+        this.#addItemSize = (index, size, status) => {
+            sizes[index] = size;
+            if (this.#maxSize) {
+                const maxSize = this.#maxSize - sizes[index];
+                while (this.#calculatedSize > maxSize) {
+                    this.#evict(true);
+                }
+            }
+            this.#calculatedSize += sizes[index];
+            if (status) {
+                status.entrySize = size;
+                status.totalCalculatedSize = this.#calculatedSize;
+            }
+        };
+    }
+    #removeItemSize = _i => { };
+    #addItemSize = (_i, _s, _st) => { };
+    #requireSize = (_k, _v, size, sizeCalculation) => {
+        if (size || sizeCalculation) {
+            throw new TypeError('cannot set size without setting maxSize or maxEntrySize on cache');
+        }
+        return 0;
+    };
+    *#indexes({ allowStale = this.allowStale } = {}) {
+        if (this.#size) {
+            for (let i = this.#tail; true;) {
+                if (!this.#isValidIndex(i)) {
+                    break;
+                }
+                if (allowStale || !this.#isStale(i)) {
+                    yield i;
+                }
+                if (i === this.#head) {
+                    break;
+                }
+                else {
+                    i = this.#prev[i];
+                }
+            }
+        }
+    }
+    *#rindexes({ allowStale = this.allowStale } = {}) {
+        if (this.#size) {
+            for (let i = this.#head; true;) {
+                if (!this.#isValidIndex(i)) {
+                    break;
+                }
+                if (allowStale || !this.#isStale(i)) {
+                    yield i;
+                }
+                if (i === this.#tail) {
+                    break;
+                }
+                else {
+                    i = this.#next[i];
+                }
+            }
+        }
+    }
+    #isValidIndex(index) {
+        return (index !== undefined &&
+            this.#keyMap.get(this.#keyList[index]) === index);
+    }
+    /**
+     * Return a generator yielding `[key, value]` pairs,
+     * in order from most recently used to least recently used.
+     */
+    *entries() {
+        for (const i of this.#indexes()) {
+            if (this.#valList[i] !== undefined &&
+                this.#keyList[i] !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield [this.#keyList[i], this.#valList[i]];
+            }
+        }
+    }
+    /**
+     * Inverse order version of {@link LRUCache.entries}
+     *
+     * Return a generator yielding `[key, value]` pairs,
+     * in order from least recently used to most recently used.
+     */
+    *rentries() {
+        for (const i of this.#rindexes()) {
+            if (this.#valList[i] !== undefined &&
+                this.#keyList[i] !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield [this.#keyList[i], this.#valList[i]];
+            }
+        }
+    }
+    /**
+     * Return a generator yielding the keys in the cache,
+     * in order from most recently used to least recently used.
+     */
+    *keys() {
+        for (const i of this.#indexes()) {
+            const k = this.#keyList[i];
+            if (k !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield k;
+            }
+        }
+    }
+    /**
+     * Inverse order version of {@link LRUCache.keys}
+     *
+     * Return a generator yielding the keys in the cache,
+     * in order from least recently used to most recently used.
+     */
+    *rkeys() {
+        for (const i of this.#rindexes()) {
+            const k = this.#keyList[i];
+            if (k !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield k;
+            }
+        }
+    }
+    /**
+     * Return a generator yielding the values in the cache,
+     * in order from most recently used to least recently used.
+     */
+    *values() {
+        for (const i of this.#indexes()) {
+            const v = this.#valList[i];
+            if (v !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield this.#valList[i];
+            }
+        }
+    }
+    /**
+     * Inverse order version of {@link LRUCache.values}
+     *
+     * Return a generator yielding the values in the cache,
+     * in order from least recently used to most recently used.
+     */
+    *rvalues() {
+        for (const i of this.#rindexes()) {
+            const v = this.#valList[i];
+            if (v !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield this.#valList[i];
+            }
+        }
+    }
+    /**
+     * Iterating over the cache itself yields the same results as
+     * {@link LRUCache.entries}
+     */
+    [Symbol.iterator]() {
+        return this.entries();
+    }
+    /**
+     * A String value that is used in the creation of the default string
+     * description of an object. Called by the built-in method
+     * `Object.prototype.toString`.
+     */
+    [Symbol.toStringTag] = 'LRUCache';
+    /**
+     * Find a value for which the supplied fn method returns a truthy value,
+     * similar to `Array.find()`. fn is called as `fn(value, key, cache)`.
+     */
+    find(fn, getOptions = {}) {
+        for (const i of this.#indexes()) {
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v)
+                ? v.__staleWhileFetching
+                : v;
+            if (value === undefined)
+                continue;
+            if (fn(value, this.#keyList[i], this)) {
+                return this.get(this.#keyList[i], getOptions);
+            }
+        }
+    }
+    /**
+     * Call the supplied function on each item in the cache, in order from most
+     * recently used to least recently used.
+     *
+     * `fn` is called as `fn(value, key, cache)`.
+     *
+     * If `thisp` is provided, function will be called in the `this`-context of
+     * the provided object, or the cache if no `thisp` object is provided.
+     *
+     * Does not update age or recenty of use, or iterate over stale values.
+     */
+    forEach(fn, thisp = this) {
+        for (const i of this.#indexes()) {
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v)
+                ? v.__staleWhileFetching
+                : v;
+            if (value === undefined)
+                continue;
+            fn.call(thisp, value, this.#keyList[i], this);
+        }
+    }
+    /**
+     * The same as {@link LRUCache.forEach} but items are iterated over in
+     * reverse order.  (ie, less recently used items are iterated over first.)
+     */
+    rforEach(fn, thisp = this) {
+        for (const i of this.#rindexes()) {
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v)
+                ? v.__staleWhileFetching
+                : v;
+            if (value === undefined)
+                continue;
+            fn.call(thisp, value, this.#keyList[i], this);
+        }
+    }
+    /**
+     * Delete any stale entries. Returns true if anything was removed,
+     * false otherwise.
+     */
+    purgeStale() {
+        let deleted = false;
+        for (const i of this.#rindexes({ allowStale: true })) {
+            if (this.#isStale(i)) {
+                this.#delete(this.#keyList[i], 'expire');
+                deleted = true;
+            }
+        }
+        return deleted;
+    }
+    /**
+     * Get the extended info about a given entry, to get its value, size, and
+     * TTL info simultaneously. Returns `undefined` if the key is not present.
+     *
+     * Unlike {@link LRUCache#dump}, which is designed to be portable and survive
+     * serialization, the `start` value is always the current timestamp, and the
+     * `ttl` is a calculated remaining time to live (negative if expired).
+     *
+     * Always returns stale values, if their info is found in the cache, so be
+     * sure to check for expirations (ie, a negative {@link LRUCache.Entry#ttl})
+     * if relevant.
+     */
+    info(key) {
+        const i = this.#keyMap.get(key);
+        if (i === undefined)
+            return undefined;
+        const v = this.#valList[i];
+        const value = this.#isBackgroundFetch(v)
+            ? v.__staleWhileFetching
+            : v;
+        if (value === undefined)
+            return undefined;
+        const entry = { value };
+        if (this.#ttls && this.#starts) {
+            const ttl = this.#ttls[i];
+            const start = this.#starts[i];
+            if (ttl && start) {
+                const remain = ttl - (perf.now() - start);
+                entry.ttl = remain;
+                entry.start = Date.now();
+            }
+        }
+        if (this.#sizes) {
+            entry.size = this.#sizes[i];
+        }
+        return entry;
+    }
+    /**
+     * Return an array of [key, {@link LRUCache.Entry}] tuples which can be
+     * passed to {@link LRLUCache#load}.
+     *
+     * The `start` fields are calculated relative to a portable `Date.now()`
+     * timestamp, even if `performance.now()` is available.
+     *
+     * Stale entries are always included in the `dump`, even if
+     * {@link LRUCache.OptionsBase.allowStale} is false.
+     *
+     * Note: this returns an actual array, not a generator, so it can be more
+     * easily passed around.
+     */
+    dump() {
+        const arr = [];
+        for (const i of this.#indexes({ allowStale: true })) {
+            const key = this.#keyList[i];
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v)
+                ? v.__staleWhileFetching
+                : v;
+            if (value === undefined || key === undefined)
+                continue;
+            const entry = { value };
+            if (this.#ttls && this.#starts) {
+                entry.ttl = this.#ttls[i];
+                // always dump the start relative to a portable timestamp
+                // it's ok for this to be a bit slow, it's a rare operation.
+                const age = perf.now() - this.#starts[i];
+                entry.start = Math.floor(Date.now() - age);
+            }
+            if (this.#sizes) {
+                entry.size = this.#sizes[i];
+            }
+            arr.unshift([key, entry]);
+        }
+        return arr;
+    }
+    /**
+     * Reset the cache and load in the items in entries in the order listed.
+     *
+     * The shape of the resulting cache may be different if the same options are
+     * not used in both caches.
+     *
+     * The `start` fields are assumed to be calculated relative to a portable
+     * `Date.now()` timestamp, even if `performance.now()` is available.
+     */
+    load(arr) {
+        this.clear();
+        for (const [key, entry] of arr) {
+            if (entry.start) {
+                // entry.start is a portable timestamp, but we may be using
+                // node's performance.now(), so calculate the offset, so that
+                // we get the intended remaining TTL, no matter how long it's
+                // been on ice.
+                //
+                // it's ok for this to be a bit slow, it's a rare operation.
+                const age = Date.now() - entry.start;
+                entry.start = perf.now() - age;
+            }
+            this.set(key, entry.value, entry);
+        }
+    }
+    /**
+     * Add a value to the cache.
+     *
+     * Note: if `undefined` is specified as a value, this is an alias for
+     * {@link LRUCache#delete}
+     *
+     * Fields on the {@link LRUCache.SetOptions} options param will override
+     * their corresponding values in the constructor options for the scope
+     * of this single `set()` operation.
+     *
+     * If `start` is provided, then that will set the effective start
+     * time for the TTL calculation. Note that this must be a previous
+     * value of `performance.now()` if supported, or a previous value of
+     * `Date.now()` if not.
+     *
+     * Options object may also include `size`, which will prevent
+     * calling the `sizeCalculation` function and just use the specified
+     * number if it is a positive integer, and `noDisposeOnSet` which
+     * will prevent calling a `dispose` function in the case of
+     * overwrites.
+     *
+     * If the `size` (or return value of `sizeCalculation`) for a given
+     * entry is greater than `maxEntrySize`, then the item will not be
+     * added to the cache.
+     *
+     * Will update the recency of the entry.
+     *
+     * If the value is `undefined`, then this is an alias for
+     * `cache.delete(key)`. `undefined` is never stored in the cache.
+     */
+    set(k, v, setOptions = {}) {
+        if (v === undefined) {
+            this.delete(k);
+            return this;
+        }
+        const { ttl = this.ttl, start, noDisposeOnSet = this.noDisposeOnSet, sizeCalculation = this.sizeCalculation, status, } = setOptions;
+        let { noUpdateTTL = this.noUpdateTTL } = setOptions;
+        const size = this.#requireSize(k, v, setOptions.size || 0, sizeCalculation);
+        // if the item doesn't fit, don't do anything
+        // NB: maxEntrySize set to maxSize by default
+        if (this.maxEntrySize && size > this.maxEntrySize) {
+            if (status) {
+                status.set = 'miss';
+                status.maxEntrySizeExceeded = true;
+            }
+            // have to delete, in case something is there already.
+            this.#delete(k, 'set');
+            return this;
+        }
+        let index = this.#size === 0 ? undefined : this.#keyMap.get(k);
+        if (index === undefined) {
+            // addition
+            index = (this.#size === 0
+                ? this.#tail
+                : this.#free.length !== 0
+                    ? this.#free.pop()
+                    : this.#size === this.#max
+                        ? this.#evict(false)
+                        : this.#size);
+            this.#keyList[index] = k;
+            this.#valList[index] = v;
+            this.#keyMap.set(k, index);
+            this.#next[this.#tail] = index;
+            this.#prev[index] = this.#tail;
+            this.#tail = index;
+            this.#size++;
+            this.#addItemSize(index, size, status);
+            if (status)
+                status.set = 'add';
+            noUpdateTTL = false;
+        }
+        else {
+            // update
+            this.#moveToTail(index);
+            const oldVal = this.#valList[index];
+            if (v !== oldVal) {
+                if (this.#hasFetchMethod && this.#isBackgroundFetch(oldVal)) {
+                    oldVal.__abortController.abort(new Error('replaced'));
+                    const { __staleWhileFetching: s } = oldVal;
+                    if (s !== undefined && !noDisposeOnSet) {
+                        if (this.#hasDispose) {
+                            this.#dispose?.(s, k, 'set');
+                        }
+                        if (this.#hasDisposeAfter) {
+                            this.#disposed?.push([s, k, 'set']);
+                        }
+                    }
+                }
+                else if (!noDisposeOnSet) {
+                    if (this.#hasDispose) {
+                        this.#dispose?.(oldVal, k, 'set');
+                    }
+                    if (this.#hasDisposeAfter) {
+                        this.#disposed?.push([oldVal, k, 'set']);
+                    }
+                }
+                this.#removeItemSize(index);
+                this.#addItemSize(index, size, status);
+                this.#valList[index] = v;
+                if (status) {
+                    status.set = 'replace';
+                    const oldValue = oldVal && this.#isBackgroundFetch(oldVal)
+                        ? oldVal.__staleWhileFetching
+                        : oldVal;
+                    if (oldValue !== undefined)
+                        status.oldValue = oldValue;
+                }
+            }
+            else if (status) {
+                status.set = 'update';
+            }
+        }
+        if (ttl !== 0 && !this.#ttls) {
+            this.#initializeTTLTracking();
+        }
+        if (this.#ttls) {
+            if (!noUpdateTTL) {
+                this.#setItemTTL(index, ttl, start);
+            }
+            if (status)
+                this.#statusTTL(status, index);
+        }
+        if (!noDisposeOnSet && this.#hasDisposeAfter && this.#disposed) {
+            const dt = this.#disposed;
+            let task;
+            while ((task = dt?.shift())) {
+                this.#disposeAfter?.(...task);
+            }
+        }
+        return this;
+    }
+    /**
+     * Evict the least recently used item, returning its value or
+     * `undefined` if cache is empty.
+     */
+    pop() {
+        try {
+            while (this.#size) {
+                const val = this.#valList[this.#head];
+                this.#evict(true);
+                if (this.#isBackgroundFetch(val)) {
+                    if (val.__staleWhileFetching) {
+                        return val.__staleWhileFetching;
+                    }
+                }
+                else if (val !== undefined) {
+                    return val;
+                }
+            }
+        }
+        finally {
+            if (this.#hasDisposeAfter && this.#disposed) {
+                const dt = this.#disposed;
+                let task;
+                while ((task = dt?.shift())) {
+                    this.#disposeAfter?.(...task);
+                }
+            }
+        }
+    }
+    #evict(free) {
+        const head = this.#head;
+        const k = this.#keyList[head];
+        const v = this.#valList[head];
+        if (this.#hasFetchMethod && this.#isBackgroundFetch(v)) {
+            v.__abortController.abort(new Error('evicted'));
+        }
+        else if (this.#hasDispose || this.#hasDisposeAfter) {
+            if (this.#hasDispose) {
+                this.#dispose?.(v, k, 'evict');
+            }
+            if (this.#hasDisposeAfter) {
+                this.#disposed?.push([v, k, 'evict']);
+            }
+        }
+        this.#removeItemSize(head);
+        // if we aren't about to use the index, then null these out
+        if (free) {
+            this.#keyList[head] = undefined;
+            this.#valList[head] = undefined;
+            this.#free.push(head);
+        }
+        if (this.#size === 1) {
+            this.#head = this.#tail = 0;
+            this.#free.length = 0;
+        }
+        else {
+            this.#head = this.#next[head];
+        }
+        this.#keyMap.delete(k);
+        this.#size--;
+        return head;
+    }
+    /**
+     * Check if a key is in the cache, without updating the recency of use.
+     * Will return false if the item is stale, even though it is technically
+     * in the cache.
+     *
+     * Check if a key is in the cache, without updating the recency of
+     * use. Age is updated if {@link LRUCache.OptionsBase.updateAgeOnHas} is set
+     * to `true` in either the options or the constructor.
+     *
+     * Will return `false` if the item is stale, even though it is technically in
+     * the cache. The difference can be determined (if it matters) by using a
+     * `status` argument, and inspecting the `has` field.
+     *
+     * Will not update item age unless
+     * {@link LRUCache.OptionsBase.updateAgeOnHas} is set.
+     */
+    has(k, hasOptions = {}) {
+        const { updateAgeOnHas = this.updateAgeOnHas, status } = hasOptions;
+        const index = this.#keyMap.get(k);
+        if (index !== undefined) {
+            const v = this.#valList[index];
+            if (this.#isBackgroundFetch(v) &&
+                v.__staleWhileFetching === undefined) {
+                return false;
+            }
+            if (!this.#isStale(index)) {
+                if (updateAgeOnHas) {
+                    this.#updateItemAge(index);
+                }
+                if (status) {
+                    status.has = 'hit';
+                    this.#statusTTL(status, index);
+                }
+                return true;
+            }
+            else if (status) {
+                status.has = 'stale';
+                this.#statusTTL(status, index);
+            }
+        }
+        else if (status) {
+            status.has = 'miss';
+        }
+        return false;
+    }
+    /**
+     * Like {@link LRUCache#get} but doesn't update recency or delete stale
+     * items.
+     *
+     * Returns `undefined` if the item is stale, unless
+     * {@link LRUCache.OptionsBase.allowStale} is set.
+     */
+    peek(k, peekOptions = {}) {
+        const { allowStale = this.allowStale } = peekOptions;
+        const index = this.#keyMap.get(k);
+        if (index === undefined ||
+            (!allowStale && this.#isStale(index))) {
+            return;
+        }
+        const v = this.#valList[index];
+        // either stale and allowed, or forcing a refresh of non-stale value
+        return this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v;
+    }
+    #backgroundFetch(k, index, options, context) {
+        const v = index === undefined ? undefined : this.#valList[index];
+        if (this.#isBackgroundFetch(v)) {
+            return v;
+        }
+        const ac = new AC();
+        const { signal } = options;
+        // when/if our AC signals, then stop listening to theirs.
+        signal?.addEventListener('abort', () => ac.abort(signal.reason), {
+            signal: ac.signal,
+        });
+        const fetchOpts = {
+            signal: ac.signal,
+            options,
+            context,
+        };
+        const cb = (v, updateCache = false) => {
+            const { aborted } = ac.signal;
+            const ignoreAbort = options.ignoreFetchAbort && v !== undefined;
+            if (options.status) {
+                if (aborted && !updateCache) {
+                    options.status.fetchAborted = true;
+                    options.status.fetchError = ac.signal.reason;
+                    if (ignoreAbort)
+                        options.status.fetchAbortIgnored = true;
+                }
+                else {
+                    options.status.fetchResolved = true;
+                }
+            }
+            if (aborted && !ignoreAbort && !updateCache) {
+                return fetchFail(ac.signal.reason);
+            }
+            // either we didn't abort, and are still here, or we did, and ignored
+            const bf = p;
+            if (this.#valList[index] === p) {
+                if (v === undefined) {
+                    if (bf.__staleWhileFetching) {
+                        this.#valList[index] = bf.__staleWhileFetching;
+                    }
+                    else {
+                        this.#delete(k, 'fetch');
+                    }
+                }
+                else {
+                    if (options.status)
+                        options.status.fetchUpdated = true;
+                    this.set(k, v, fetchOpts.options);
+                }
+            }
+            return v;
+        };
+        const eb = (er) => {
+            if (options.status) {
+                options.status.fetchRejected = true;
+                options.status.fetchError = er;
+            }
+            return fetchFail(er);
+        };
+        const fetchFail = (er) => {
+            const { aborted } = ac.signal;
+            const allowStaleAborted = aborted && options.allowStaleOnFetchAbort;
+            const allowStale = allowStaleAborted || options.allowStaleOnFetchRejection;
+            const noDelete = allowStale || options.noDeleteOnFetchRejection;
+            const bf = p;
+            if (this.#valList[index] === p) {
+                // if we allow stale on fetch rejections, then we need to ensure that
+                // the stale value is not removed from the cache when the fetch fails.
+                const del = !noDelete || bf.__staleWhileFetching === undefined;
+                if (del) {
+                    this.#delete(k, 'fetch');
+                }
+                else if (!allowStaleAborted) {
+                    // still replace the *promise* with the stale value,
+                    // since we are done with the promise at this point.
+                    // leave it untouched if we're still waiting for an
+                    // aborted background fetch that hasn't yet returned.
+                    this.#valList[index] = bf.__staleWhileFetching;
+                }
+            }
+            if (allowStale) {
+                if (options.status && bf.__staleWhileFetching !== undefined) {
+                    options.status.returnedStale = true;
+                }
+                return bf.__staleWhileFetching;
+            }
+            else if (bf.__returned === bf) {
+                throw er;
+            }
+        };
+        const pcall = (res, rej) => {
+            const fmp = this.#fetchMethod?.(k, v, fetchOpts);
+            if (fmp && fmp instanceof Promise) {
+                fmp.then(v => res(v === undefined ? undefined : v), rej);
+            }
+            // ignored, we go until we finish, regardless.
+            // defer check until we are actually aborting,
+            // so fetchMethod can override.
+            ac.signal.addEventListener('abort', () => {
+                if (!options.ignoreFetchAbort ||
+                    options.allowStaleOnFetchAbort) {
+                    res(undefined);
+                    // when it eventually resolves, update the cache.
+                    if (options.allowStaleOnFetchAbort) {
+                        res = v => cb(v, true);
+                    }
+                }
+            });
+        };
+        if (options.status)
+            options.status.fetchDispatched = true;
+        const p = new Promise(pcall).then(cb, eb);
+        const bf = Object.assign(p, {
+            __abortController: ac,
+            __staleWhileFetching: v,
+            __returned: undefined,
+        });
+        if (index === undefined) {
+            // internal, don't expose status.
+            this.set(k, bf, { ...fetchOpts.options, status: undefined });
+            index = this.#keyMap.get(k);
+        }
+        else {
+            this.#valList[index] = bf;
+        }
+        return bf;
+    }
+    #isBackgroundFetch(p) {
+        if (!this.#hasFetchMethod)
+            return false;
+        const b = p;
+        return (!!b &&
+            b instanceof Promise &&
+            b.hasOwnProperty('__staleWhileFetching') &&
+            b.__abortController instanceof AC);
+    }
+    async fetch(k, fetchOptions = {}) {
+        const { 
+        // get options
+        allowStale = this.allowStale, updateAgeOnGet = this.updateAgeOnGet, noDeleteOnStaleGet = this.noDeleteOnStaleGet, 
+        // set options
+        ttl = this.ttl, noDisposeOnSet = this.noDisposeOnSet, size = 0, sizeCalculation = this.sizeCalculation, noUpdateTTL = this.noUpdateTTL, 
+        // fetch exclusive options
+        noDeleteOnFetchRejection = this.noDeleteOnFetchRejection, allowStaleOnFetchRejection = this.allowStaleOnFetchRejection, ignoreFetchAbort = this.ignoreFetchAbort, allowStaleOnFetchAbort = this.allowStaleOnFetchAbort, context, forceRefresh = false, status, signal, } = fetchOptions;
+        if (!this.#hasFetchMethod) {
+            if (status)
+                status.fetch = 'get';
+            return this.get(k, {
+                allowStale,
+                updateAgeOnGet,
+                noDeleteOnStaleGet,
+                status,
+            });
+        }
+        const options = {
+            allowStale,
+            updateAgeOnGet,
+            noDeleteOnStaleGet,
+            ttl,
+            noDisposeOnSet,
+            size,
+            sizeCalculation,
+            noUpdateTTL,
+            noDeleteOnFetchRejection,
+            allowStaleOnFetchRejection,
+            allowStaleOnFetchAbort,
+            ignoreFetchAbort,
+            status,
+            signal,
+        };
+        let index = this.#keyMap.get(k);
+        if (index === undefined) {
+            if (status)
+                status.fetch = 'miss';
+            const p = this.#backgroundFetch(k, index, options, context);
+            return (p.__returned = p);
+        }
+        else {
+            // in cache, maybe already fetching
+            const v = this.#valList[index];
+            if (this.#isBackgroundFetch(v)) {
+                const stale = allowStale && v.__staleWhileFetching !== undefined;
+                if (status) {
+                    status.fetch = 'inflight';
+                    if (stale)
+                        status.returnedStale = true;
+                }
+                return stale ? v.__staleWhileFetching : (v.__returned = v);
+            }
+            // if we force a refresh, that means do NOT serve the cached value,
+            // unless we are already in the process of refreshing the cache.
+            const isStale = this.#isStale(index);
+            if (!forceRefresh && !isStale) {
+                if (status)
+                    status.fetch = 'hit';
+                this.#moveToTail(index);
+                if (updateAgeOnGet) {
+                    this.#updateItemAge(index);
+                }
+                if (status)
+                    this.#statusTTL(status, index);
+                return v;
+            }
+            // ok, it is stale or a forced refresh, and not already fetching.
+            // refresh the cache.
+            const p = this.#backgroundFetch(k, index, options, context);
+            const hasStale = p.__staleWhileFetching !== undefined;
+            const staleVal = hasStale && allowStale;
+            if (status) {
+                status.fetch = isStale ? 'stale' : 'refresh';
+                if (staleVal && isStale)
+                    status.returnedStale = true;
+            }
+            return staleVal ? p.__staleWhileFetching : (p.__returned = p);
+        }
+    }
+    async forceFetch(k, fetchOptions = {}) {
+        const v = await this.fetch(k, fetchOptions);
+        if (v === undefined)
+            throw new Error('fetch() returned undefined');
+        return v;
+    }
+    memo(k, memoOptions = {}) {
+        const memoMethod = this.#memoMethod;
+        if (!memoMethod) {
+            throw new Error('no memoMethod provided to constructor');
+        }
+        const { context, forceRefresh, ...options } = memoOptions;
+        const v = this.get(k, options);
+        if (!forceRefresh && v !== undefined)
+            return v;
+        const vv = memoMethod(k, v, {
+            options,
+            context,
+        });
+        this.set(k, vv, options);
+        return vv;
+    }
+    /**
+     * Return a value from the cache. Will update the recency of the cache
+     * entry found.
+     *
+     * If the key is not found, get() will return `undefined`.
+     */
+    get(k, getOptions = {}) {
+        const { allowStale = this.allowStale, updateAgeOnGet = this.updateAgeOnGet, noDeleteOnStaleGet = this.noDeleteOnStaleGet, status, } = getOptions;
+        const index = this.#keyMap.get(k);
+        if (index !== undefined) {
+            const value = this.#valList[index];
+            const fetching = this.#isBackgroundFetch(value);
+            if (status)
+                this.#statusTTL(status, index);
+            if (this.#isStale(index)) {
+                if (status)
+                    status.get = 'stale';
+                // delete only if not an in-flight background fetch
+                if (!fetching) {
+                    if (!noDeleteOnStaleGet) {
+                        this.#delete(k, 'expire');
+                    }
+                    if (status && allowStale)
+                        status.returnedStale = true;
+                    return allowStale ? value : undefined;
+                }
+                else {
+                    if (status &&
+                        allowStale &&
+                        value.__staleWhileFetching !== undefined) {
+                        status.returnedStale = true;
+                    }
+                    return allowStale ? value.__staleWhileFetching : undefined;
+                }
+            }
+            else {
+                if (status)
+                    status.get = 'hit';
+                // if we're currently fetching it, we don't actually have it yet
+                // it's not stale, which means this isn't a staleWhileRefetching.
+                // If it's not stale, and fetching, AND has a __staleWhileFetching
+                // value, then that means the user fetched with {forceRefresh:true},
+                // so it's safe to return that value.
+                if (fetching) {
+                    return value.__staleWhileFetching;
+                }
+                this.#moveToTail(index);
+                if (updateAgeOnGet) {
+                    this.#updateItemAge(index);
+                }
+                return value;
+            }
+        }
+        else if (status) {
+            status.get = 'miss';
+        }
+    }
+    #connect(p, n) {
+        this.#prev[n] = p;
+        this.#next[p] = n;
+    }
+    #moveToTail(index) {
+        // if tail already, nothing to do
+        // if head, move head to next[index]
+        // else
+        //   move next[prev[index]] to next[index] (head has no prev)
+        //   move prev[next[index]] to prev[index]
+        // prev[index] = tail
+        // next[tail] = index
+        // tail = index
+        if (index !== this.#tail) {
+            if (index === this.#head) {
+                this.#head = this.#next[index];
+            }
+            else {
+                this.#connect(this.#prev[index], this.#next[index]);
+            }
+            this.#connect(this.#tail, index);
+            this.#tail = index;
+        }
+    }
+    /**
+     * Deletes a key out of the cache.
+     *
+     * Returns true if the key was deleted, false otherwise.
+     */
+    delete(k) {
+        return this.#delete(k, 'delete');
+    }
+    #delete(k, reason) {
+        let deleted = false;
+        if (this.#size !== 0) {
+            const index = this.#keyMap.get(k);
+            if (index !== undefined) {
+                deleted = true;
+                if (this.#size === 1) {
+                    this.#clear(reason);
+                }
+                else {
+                    this.#removeItemSize(index);
+                    const v = this.#valList[index];
+                    if (this.#isBackgroundFetch(v)) {
+                        v.__abortController.abort(new Error('deleted'));
+                    }
+                    else if (this.#hasDispose || this.#hasDisposeAfter) {
+                        if (this.#hasDispose) {
+                            this.#dispose?.(v, k, reason);
+                        }
+                        if (this.#hasDisposeAfter) {
+                            this.#disposed?.push([v, k, reason]);
+                        }
+                    }
+                    this.#keyMap.delete(k);
+                    this.#keyList[index] = undefined;
+                    this.#valList[index] = undefined;
+                    if (index === this.#tail) {
+                        this.#tail = this.#prev[index];
+                    }
+                    else if (index === this.#head) {
+                        this.#head = this.#next[index];
+                    }
+                    else {
+                        const pi = this.#prev[index];
+                        this.#next[pi] = this.#next[index];
+                        const ni = this.#next[index];
+                        this.#prev[ni] = this.#prev[index];
+                    }
+                    this.#size--;
+                    this.#free.push(index);
+                }
+            }
+        }
+        if (this.#hasDisposeAfter && this.#disposed?.length) {
+            const dt = this.#disposed;
+            let task;
+            while ((task = dt?.shift())) {
+                this.#disposeAfter?.(...task);
+            }
+        }
+        return deleted;
+    }
+    /**
+     * Clear the cache entirely, throwing away all values.
+     */
+    clear() {
+        return this.#clear('delete');
+    }
+    #clear(reason) {
+        for (const index of this.#rindexes({ allowStale: true })) {
+            const v = this.#valList[index];
+            if (this.#isBackgroundFetch(v)) {
+                v.__abortController.abort(new Error('deleted'));
+            }
+            else {
+                const k = this.#keyList[index];
+                if (this.#hasDispose) {
+                    this.#dispose?.(v, k, reason);
+                }
+                if (this.#hasDisposeAfter) {
+                    this.#disposed?.push([v, k, reason]);
+                }
+            }
+        }
+        this.#keyMap.clear();
+        this.#valList.fill(undefined);
+        this.#keyList.fill(undefined);
+        if (this.#ttls && this.#starts) {
+            this.#ttls.fill(0);
+            this.#starts.fill(0);
+        }
+        if (this.#sizes) {
+            this.#sizes.fill(0);
+        }
+        this.#head = 0;
+        this.#tail = 0;
+        this.#free.length = 0;
+        this.#calculatedSize = 0;
+        this.#size = 0;
+        if (this.#hasDisposeAfter && this.#disposed) {
+            const dt = this.#disposed;
+            let task;
+            while ((task = dt?.shift())) {
+                this.#disposeAfter?.(...task);
+            }
+        }
+    }
+}
+exports.LRUCache = LRUCache;
+//# sourceMappingURL=index.js.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.js.map b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.js.map
new file mode 100644
index 0000000..557c616
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.js.map
@@ -0,0 +1 @@
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* @module LRUCache\n */\n\n// module-private names and types\ntype Perf = { now: () => number }\nconst perf: Perf =\n  typeof performance === 'object' &&\n  performance &&\n  typeof performance.now === 'function'\n    ? performance\n    : Date\n\nconst warned = new Set<string>()\n\n// either a function or a class\ntype ForC = ((...a: any[]) => any) | { new (...a: any[]): any }\n\n/* c8 ignore start */\nconst PROCESS = (\n  typeof process === 'object' && !!process ? process : {}\n) as { [k: string]: any }\n/* c8 ignore start */\n\nconst emitWarning = (\n  msg: string,\n  type: string,\n  code: string,\n  fn: ForC\n) => {\n  typeof PROCESS.emitWarning === 'function'\n    ? PROCESS.emitWarning(msg, type, code, fn)\n    : console.error(`[${code}] ${type}: ${msg}`)\n}\n\nlet AC = globalThis.AbortController\nlet AS = globalThis.AbortSignal\n\n/* c8 ignore start */\nif (typeof AC === 'undefined') {\n  //@ts-ignore\n  AS = class AbortSignal {\n    onabort?: (...a: any[]) => any\n    _onabort: ((...a: any[]) => any)[] = []\n    reason?: any\n    aborted: boolean = false\n    addEventListener(_: string, fn: (...a: any[]) => any) {\n      this._onabort.push(fn)\n    }\n  }\n  //@ts-ignore\n  AC = class AbortController {\n    constructor() {\n      warnACPolyfill()\n    }\n    signal = new AS()\n    abort(reason: any) {\n      if (this.signal.aborted) return\n      //@ts-ignore\n      this.signal.reason = reason\n      //@ts-ignore\n      this.signal.aborted = true\n      //@ts-ignore\n      for (const fn of this.signal._onabort) {\n        fn(reason)\n      }\n      this.signal.onabort?.(reason)\n    }\n  }\n  let printACPolyfillWarning =\n    PROCESS.env?.LRU_CACHE_IGNORE_AC_WARNING !== '1'\n  const warnACPolyfill = () => {\n    if (!printACPolyfillWarning) return\n    printACPolyfillWarning = false\n    emitWarning(\n      'AbortController is not defined. If using lru-cache in ' +\n        'node 14, load an AbortController polyfill from the ' +\n        '`node-abort-controller` package. A minimal polyfill is ' +\n        'provided for use by LRUCache.fetch(), but it should not be ' +\n        'relied upon in other contexts (eg, passing it to other APIs that ' +\n        'use AbortController/AbortSignal might have undesirable effects). ' +\n        'You may disable this with LRU_CACHE_IGNORE_AC_WARNING=1 in the env.',\n      'NO_ABORT_CONTROLLER',\n      'ENOTSUP',\n      warnACPolyfill\n    )\n  }\n}\n/* c8 ignore stop */\n\nconst shouldWarn = (code: string) => !warned.has(code)\n\nconst TYPE = Symbol('type')\nexport type PosInt = number & { [TYPE]: 'Positive Integer' }\nexport type Index = number & { [TYPE]: 'LRUCache Index' }\n\nconst isPosInt = (n: any): n is PosInt =>\n  n && n === Math.floor(n) && n > 0 && isFinite(n)\n\nexport type UintArray = Uint8Array | Uint16Array | Uint32Array\nexport type NumberArray = UintArray | number[]\n\n/* c8 ignore start */\n// This is a little bit ridiculous, tbh.\n// The maximum array length is 2^32-1 or thereabouts on most JS impls.\n// And well before that point, you're caching the entire world, I mean,\n// that's ~32GB of just integers for the next/prev links, plus whatever\n// else to hold that many keys and values.  Just filling the memory with\n// zeroes at init time is brutal when you get that big.\n// But why not be complete?\n// Maybe in the future, these limits will have expanded.\nconst getUintArray = (max: number) =>\n  !isPosInt(max)\n    ? null\n    : max <= Math.pow(2, 8)\n    ? Uint8Array\n    : max <= Math.pow(2, 16)\n    ? Uint16Array\n    : max <= Math.pow(2, 32)\n    ? Uint32Array\n    : max <= Number.MAX_SAFE_INTEGER\n    ? ZeroArray\n    : null\n/* c8 ignore stop */\n\nclass ZeroArray extends Array<number> {\n  constructor(size: number) {\n    super(size)\n    this.fill(0)\n  }\n}\nexport type { ZeroArray }\nexport type { Stack }\n\nexport type StackLike = Stack | Index[]\nclass Stack {\n  heap: NumberArray\n  length: number\n  // private constructor\n  static #constructing: boolean = false\n  static create(max: number): StackLike {\n    const HeapCls = getUintArray(max)\n    if (!HeapCls) return []\n    Stack.#constructing = true\n    const s = new Stack(max, HeapCls)\n    Stack.#constructing = false\n    return s\n  }\n  constructor(\n    max: number,\n    HeapCls: { new (n: number): NumberArray }\n  ) {\n    /* c8 ignore start */\n    if (!Stack.#constructing) {\n      throw new TypeError('instantiate Stack using Stack.create(n)')\n    }\n    /* c8 ignore stop */\n    this.heap = new HeapCls(max)\n    this.length = 0\n  }\n  push(n: Index) {\n    this.heap[this.length++] = n\n  }\n  pop(): Index {\n    return this.heap[--this.length] as Index\n  }\n}\n\n/**\n * Promise representing an in-progress {@link LRUCache#fetch} call\n */\nexport type BackgroundFetch<V> = Promise<V | undefined> & {\n  __returned: BackgroundFetch<V> | undefined\n  __abortController: AbortController\n  __staleWhileFetching: V | undefined\n}\n\nexport type DisposeTask<K, V> = [\n  value: V,\n  key: K,\n  reason: LRUCache.DisposeReason\n]\n\nexport namespace LRUCache {\n  /**\n   * An integer greater than 0, reflecting the calculated size of items\n   */\n  export type Size = number\n\n  /**\n   * Integer greater than 0, representing some number of milliseconds, or the\n   * time at which a TTL started counting from.\n   */\n  export type Milliseconds = number\n\n  /**\n   * An integer greater than 0, reflecting a number of items\n   */\n  export type Count = number\n\n  /**\n   * The reason why an item was removed from the cache, passed\n   * to the {@link Disposer} methods.\n   *\n   * - `evict`: The item was evicted because it is the least recently used,\n   *   and the cache is full.\n   * - `set`: A new value was set, overwriting the old value being disposed.\n   * - `delete`: The item was explicitly deleted, either by calling\n   *   {@link LRUCache#delete}, {@link LRUCache#clear}, or\n   *   {@link LRUCache#set} with an undefined value.\n   * - `expire`: The item was removed due to exceeding its TTL.\n   * - `fetch`: A {@link OptionsBase#fetchMethod} operation returned\n   *   `undefined` or was aborted, causing the item to be deleted.\n   */\n  export type DisposeReason =\n    | 'evict'\n    | 'set'\n    | 'delete'\n    | 'expire'\n    | 'fetch'\n  /**\n   * A method called upon item removal, passed as the\n   * {@link OptionsBase.dispose} and/or\n   * {@link OptionsBase.disposeAfter} options.\n   */\n  export type Disposer<K, V> = (\n    value: V,\n    key: K,\n    reason: DisposeReason\n  ) => void\n\n  /**\n   * A function that returns the effective calculated size\n   * of an entry in the cache.\n   */\n  export type SizeCalculator<K, V> = (value: V, key: K) => Size\n\n  /**\n   * Options provided to the\n   * {@link OptionsBase.fetchMethod} function.\n   */\n  export interface FetcherOptions<K, V, FC = unknown> {\n    signal: AbortSignal\n    options: FetcherFetchOptions<K, V, FC>\n    /**\n     * Object provided in the {@link FetchOptions.context} option to\n     * {@link LRUCache#fetch}\n     */\n    context: FC\n  }\n\n  /**\n   * Occasionally, it may be useful to track the internal behavior of the\n   * cache, particularly for logging, debugging, or for behavior within the\n   * `fetchMethod`. To do this, you can pass a `status` object to the\n   * {@link LRUCache#fetch}, {@link LRUCache#get}, {@link LRUCache#set},\n   * {@link LRUCache#memo}, and {@link LRUCache#has} methods.\n   *\n   * The `status` option should be a plain JavaScript object. The following\n   * fields will be set on it appropriately, depending on the situation.\n   */\n  export interface Status<V> {\n    /**\n     * The status of a set() operation.\n     *\n     * - add: the item was not found in the cache, and was added\n     * - update: the item was in the cache, with the same value provided\n     * - replace: the item was in the cache, and replaced\n     * - miss: the item was not added to the cache for some reason\n     */\n    set?: 'add' | 'update' | 'replace' | 'miss'\n\n    /**\n     * the ttl stored for the item, or undefined if ttls are not used.\n     */\n    ttl?: Milliseconds\n\n    /**\n     * the start time for the item, or undefined if ttls are not used.\n     */\n    start?: Milliseconds\n\n    /**\n     * The timestamp used for TTL calculation\n     */\n    now?: Milliseconds\n\n    /**\n     * the remaining ttl for the item, or undefined if ttls are not used.\n     */\n    remainingTTL?: Milliseconds\n\n    /**\n     * The calculated size for the item, if sizes are used.\n     */\n    entrySize?: Size\n\n    /**\n     * The total calculated size of the cache, if sizes are used.\n     */\n    totalCalculatedSize?: Size\n\n    /**\n     * A flag indicating that the item was not stored, due to exceeding the\n     * {@link OptionsBase.maxEntrySize}\n     */\n    maxEntrySizeExceeded?: true\n\n    /**\n     * The old value, specified in the case of `set:'update'` or\n     * `set:'replace'`\n     */\n    oldValue?: V\n\n    /**\n     * The results of a {@link LRUCache#has} operation\n     *\n     * - hit: the item was found in the cache\n     * - stale: the item was found in the cache, but is stale\n     * - miss: the item was not found in the cache\n     */\n    has?: 'hit' | 'stale' | 'miss'\n\n    /**\n     * The status of a {@link LRUCache#fetch} operation.\n     * Note that this can change as the underlying fetch() moves through\n     * various states.\n     *\n     * - inflight: there is another fetch() for this key which is in process\n     * - get: there is no {@link OptionsBase.fetchMethod}, so\n     *   {@link LRUCache#get} was called.\n     * - miss: the item is not in cache, and will be fetched.\n     * - hit: the item is in the cache, and was resolved immediately.\n     * - stale: the item is in the cache, but stale.\n     * - refresh: the item is in the cache, and not stale, but\n     *   {@link FetchOptions.forceRefresh} was specified.\n     */\n    fetch?: 'get' | 'inflight' | 'miss' | 'hit' | 'stale' | 'refresh'\n\n    /**\n     * The {@link OptionsBase.fetchMethod} was called\n     */\n    fetchDispatched?: true\n\n    /**\n     * The cached value was updated after a successful call to\n     * {@link OptionsBase.fetchMethod}\n     */\n    fetchUpdated?: true\n\n    /**\n     * The reason for a fetch() rejection.  Either the error raised by the\n     * {@link OptionsBase.fetchMethod}, or the reason for an\n     * AbortSignal.\n     */\n    fetchError?: Error\n\n    /**\n     * The fetch received an abort signal\n     */\n    fetchAborted?: true\n\n    /**\n     * The abort signal received was ignored, and the fetch was allowed to\n     * continue.\n     */\n    fetchAbortIgnored?: true\n\n    /**\n     * The fetchMethod promise resolved successfully\n     */\n    fetchResolved?: true\n\n    /**\n     * The fetchMethod promise was rejected\n     */\n    fetchRejected?: true\n\n    /**\n     * The status of a {@link LRUCache#get} operation.\n     *\n     * - fetching: The item is currently being fetched.  If a previous value\n     *   is present and allowed, that will be returned.\n     * - stale: The item is in the cache, and is stale.\n     * - hit: the item is in the cache\n     * - miss: the item is not in the cache\n     */\n    get?: 'stale' | 'hit' | 'miss'\n\n    /**\n     * A fetch or get operation returned a stale value.\n     */\n    returnedStale?: true\n  }\n\n  /**\n   * options which override the options set in the LRUCache constructor\n   * when calling {@link LRUCache#fetch}.\n   *\n   * This is the union of {@link GetOptions} and {@link SetOptions}, plus\n   * {@link OptionsBase.noDeleteOnFetchRejection},\n   * {@link OptionsBase.allowStaleOnFetchRejection},\n   * {@link FetchOptions.forceRefresh}, and\n   * {@link FetcherOptions.context}\n   *\n   * Any of these may be modified in the {@link OptionsBase.fetchMethod}\n   * function, but the {@link GetOptions} fields will of course have no\n   * effect, as the {@link LRUCache#get} call already happened by the time\n   * the fetchMethod is called.\n   */\n  export interface FetcherFetchOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n      | 'noDeleteOnFetchRejection'\n      | 'allowStaleOnFetchRejection'\n      | 'ignoreFetchAbort'\n      | 'allowStaleOnFetchAbort'\n    > {\n    status?: Status<V>\n    size?: Size\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#fetch} method.\n   */\n  export interface FetchOptions<K, V, FC>\n    extends FetcherFetchOptions<K, V, FC> {\n    /**\n     * Set to true to force a re-load of the existing data, even if it\n     * is not yet stale.\n     */\n    forceRefresh?: boolean\n    /**\n     * Context provided to the {@link OptionsBase.fetchMethod} as\n     * the {@link FetcherOptions.context} param.\n     *\n     * If the FC type is specified as unknown (the default),\n     * undefined or void, then this is optional.  Otherwise, it will\n     * be required.\n     */\n    context?: FC\n    signal?: AbortSignal\n    status?: Status<V>\n  }\n  /**\n   * Options provided to {@link LRUCache#fetch} when the FC type is something\n   * other than `unknown`, `undefined`, or `void`\n   */\n  export interface FetchOptionsWithContext<K, V, FC>\n    extends FetchOptions<K, V, FC> {\n    context: FC\n  }\n  /**\n   * Options provided to {@link LRUCache#fetch} when the FC type is\n   * `undefined` or `void`\n   */\n  export interface FetchOptionsNoContext<K, V>\n    extends FetchOptions<K, V, undefined> {\n    context?: undefined\n  }\n\n  export interface MemoOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n      | 'noDeleteOnFetchRejection'\n      | 'allowStaleOnFetchRejection'\n      | 'ignoreFetchAbort'\n      | 'allowStaleOnFetchAbort'\n    > {\n    /**\n     * Set to true to force a re-load of the existing data, even if it\n     * is not yet stale.\n     */\n    forceRefresh?: boolean\n    /**\n     * Context provided to the {@link OptionsBase.memoMethod} as\n     * the {@link MemoizerOptions.context} param.\n     *\n     * If the FC type is specified as unknown (the default),\n     * undefined or void, then this is optional.  Otherwise, it will\n     * be required.\n     */\n    context?: FC\n    status?: Status<V>\n  }\n  /**\n   * Options provided to {@link LRUCache#memo} when the FC type is something\n   * other than `unknown`, `undefined`, or `void`\n   */\n  export interface MemoOptionsWithContext<K, V, FC>\n    extends MemoOptions<K, V, FC> {\n    context: FC\n  }\n  /**\n   * Options provided to {@link LRUCache#memo} when the FC type is\n   * `undefined` or `void`\n   */\n  export interface MemoOptionsNoContext<K, V>\n    extends MemoOptions<K, V, undefined> {\n    context?: undefined\n  }\n\n  /**\n   * Options provided to the\n   * {@link OptionsBase.memoMethod} function.\n   */\n  export interface MemoizerOptions<K, V, FC = unknown> {\n    options: MemoizerMemoOptions<K, V, FC>\n    /**\n     * Object provided in the {@link MemoOptions.context} option to\n     * {@link LRUCache#memo}\n     */\n    context: FC\n  }\n\n  /**\n   * options which override the options set in the LRUCache constructor\n   * when calling {@link LRUCache#memo}.\n   *\n   * This is the union of {@link GetOptions} and {@link SetOptions}, plus\n   * {@link MemoOptions.forceRefresh}, and\n   * {@link MemoerOptions.context}\n   *\n   * Any of these may be modified in the {@link OptionsBase.memoMethod}\n   * function, but the {@link GetOptions} fields will of course have no\n   * effect, as the {@link LRUCache#get} call already happened by the time\n   * the memoMethod is called.\n   */\n  export interface MemoizerMemoOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n    > {\n    status?: Status<V>\n    size?: Size\n    start?: Milliseconds\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#has} method.\n   */\n  export interface HasOptions<K, V, FC>\n    extends Pick<OptionsBase<K, V, FC>, 'updateAgeOnHas'> {\n    status?: Status<V>\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#get} method.\n   */\n  export interface GetOptions<K, V, FC>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet'\n    > {\n    status?: Status<V>\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#peek} method.\n   */\n  export interface PeekOptions<K, V, FC>\n    extends Pick<OptionsBase<K, V, FC>, 'allowStale'> {}\n\n  /**\n   * Options that may be passed to the {@link LRUCache#set} method.\n   */\n  export interface SetOptions<K, V, FC>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL'\n    > {\n    /**\n     * If size tracking is enabled, then setting an explicit size\n     * in the {@link LRUCache#set} call will prevent calling the\n     * {@link OptionsBase.sizeCalculation} function.\n     */\n    size?: Size\n    /**\n     * If TTL tracking is enabled, then setting an explicit start\n     * time in the {@link LRUCache#set} call will override the\n     * default time from `performance.now()` or `Date.now()`.\n     *\n     * Note that it must be a valid value for whichever time-tracking\n     * method is in use.\n     */\n    start?: Milliseconds\n    status?: Status<V>\n  }\n\n  /**\n   * The type signature for the {@link OptionsBase.fetchMethod} option.\n   */\n  export type Fetcher<K, V, FC = unknown> = (\n    key: K,\n    staleValue: V | undefined,\n    options: FetcherOptions<K, V, FC>\n  ) => Promise<V | undefined | void> | V | undefined | void\n\n  /**\n   * the type signature for the {@link OptionsBase.memoMethod} option.\n   */\n  export type Memoizer<K, V, FC = unknown> = (\n    key: K,\n    staleValue: V | undefined,\n    options: MemoizerOptions<K, V, FC>\n  ) => V\n\n  /**\n   * Options which may be passed to the {@link LRUCache} constructor.\n   *\n   * Most of these may be overridden in the various options that use\n   * them.\n   *\n   * Despite all being technically optional, the constructor requires that\n   * a cache is at minimum limited by one or more of {@link OptionsBase.max},\n   * {@link OptionsBase.ttl}, or {@link OptionsBase.maxSize}.\n   *\n   * If {@link OptionsBase.ttl} is used alone, then it is strongly advised\n   * (and in fact required by the type definitions here) that the cache\n   * also set {@link OptionsBase.ttlAutopurge}, to prevent potentially\n   * unbounded storage.\n   *\n   * All options are also available on the {@link LRUCache} instance, making\n   * it safe to pass an LRUCache instance as the options argumemnt to\n   * make another empty cache of the same type.\n   *\n   * Some options are marked as read-only, because changing them after\n   * instantiation is not safe. Changing any of the other options will of\n   * course only have an effect on subsequent method calls.\n   */\n  export interface OptionsBase<K, V, FC> {\n    /**\n     * The maximum number of items to store in the cache before evicting\n     * old entries. This is read-only on the {@link LRUCache} instance,\n     * and may not be overridden.\n     *\n     * If set, then storage space will be pre-allocated at construction\n     * time, and the cache will perform significantly faster.\n     *\n     * Note that significantly fewer items may be stored, if\n     * {@link OptionsBase.maxSize} and/or {@link OptionsBase.ttl} are also\n     * set.\n     *\n     * **It is strongly recommended to set a `max` to prevent unbounded growth\n     * of the cache.**\n     */\n    max?: Count\n\n    /**\n     * Max time in milliseconds for items to live in cache before they are\n     * considered stale.  Note that stale items are NOT preemptively removed by\n     * default, and MAY live in the cache, contributing to its LRU max, long\n     * after they have expired, unless {@link OptionsBase.ttlAutopurge} is\n     * set.\n     *\n     * If set to `0` (the default value), then that means \"do not track\n     * TTL\", not \"expire immediately\".\n     *\n     * Also, as this cache is optimized for LRU/MRU operations, some of\n     * the staleness/TTL checks will reduce performance, as they will incur\n     * overhead by deleting items.\n     *\n     * This is not primarily a TTL cache, and does not make strong TTL\n     * guarantees. There is no pre-emptive pruning of expired items, but you\n     * _may_ set a TTL on the cache, and it will treat expired items as missing\n     * when they are fetched, and delete them.\n     *\n     * Optional, but must be a non-negative integer in ms if specified.\n     *\n     * This may be overridden by passing an options object to `cache.set()`.\n     *\n     * At least one of `max`, `maxSize`, or `TTL` is required. This must be a\n     * positive integer if set.\n     *\n     * Even if ttl tracking is enabled, **it is strongly recommended to set a\n     * `max` to prevent unbounded growth of the cache.**\n     *\n     * If ttl tracking is enabled, and `max` and `maxSize` are not set,\n     * and `ttlAutopurge` is not set, then a warning will be emitted\n     * cautioning about the potential for unbounded memory consumption.\n     * (The TypeScript definitions will also discourage this.)\n     */\n    ttl?: Milliseconds\n\n    /**\n     * Minimum amount of time in ms in which to check for staleness.\n     * Defaults to 1, which means that the current time is checked\n     * at most once per millisecond.\n     *\n     * Set to 0 to check the current time every time staleness is tested.\n     * (This reduces performance, and is theoretically unnecessary.)\n     *\n     * Setting this to a higher value will improve performance somewhat\n     * while using ttl tracking, albeit at the expense of keeping stale\n     * items around a bit longer than their TTLs would indicate.\n     *\n     * @default 1\n     */\n    ttlResolution?: Milliseconds\n\n    /**\n     * Preemptively remove stale items from the cache.\n     *\n     * Note that this may *significantly* degrade performance, especially if\n     * the cache is storing a large number of items. It is almost always best\n     * to just leave the stale items in the cache, and let them fall out as new\n     * items are added.\n     *\n     * Note that this means that {@link OptionsBase.allowStale} is a bit\n     * pointless, as stale items will be deleted almost as soon as they\n     * expire.\n     *\n     * Use with caution!\n     */\n    ttlAutopurge?: boolean\n\n    /**\n     * When using time-expiring entries with `ttl`, setting this to `true` will\n     * make each item's age reset to 0 whenever it is retrieved from cache with\n     * {@link LRUCache#get}, causing it to not expire. (It can still fall out\n     * of cache based on recency of use, of course.)\n     *\n     * Has no effect if {@link OptionsBase.ttl} is not set.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     */\n    updateAgeOnGet?: boolean\n\n    /**\n     * When using time-expiring entries with `ttl`, setting this to `true` will\n     * make each item's age reset to 0 whenever its presence in the cache is\n     * checked with {@link LRUCache#has}, causing it to not expire. (It can\n     * still fall out of cache based on recency of use, of course.)\n     *\n     * Has no effect if {@link OptionsBase.ttl} is not set.\n     */\n    updateAgeOnHas?: boolean\n\n    /**\n     * Allow {@link LRUCache#get} and {@link LRUCache#fetch} calls to return\n     * stale data, if available.\n     *\n     * By default, if you set `ttl`, stale items will only be deleted from the\n     * cache when you `get(key)`. That is, it's not preemptively pruning items,\n     * unless {@link OptionsBase.ttlAutopurge} is set.\n     *\n     * If you set `allowStale:true`, it'll return the stale value *as well as*\n     * deleting it. If you don't set this, then it'll return `undefined` when\n     * you try to get a stale entry.\n     *\n     * Note that when a stale entry is fetched, _even if it is returned due to\n     * `allowStale` being set_, it is removed from the cache immediately. You\n     * can suppress this behavior by setting\n     * {@link OptionsBase.noDeleteOnStaleGet}, either in the constructor, or in\n     * the options provided to {@link LRUCache#get}.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     * The `cache.has()` method will always return `false` for stale items.\n     *\n     * Only relevant if a ttl is set.\n     */\n    allowStale?: boolean\n\n    /**\n     * Function that is called on items when they are dropped from the\n     * cache, as `dispose(value, key, reason)`.\n     *\n     * This can be handy if you want to close file descriptors or do\n     * other cleanup tasks when items are no longer stored in the cache.\n     *\n     * **NOTE**: It is called _before_ the item has been fully removed\n     * from the cache, so if you want to put it right back in, you need\n     * to wait until the next tick. If you try to add it back in during\n     * the `dispose()` function call, it will break things in subtle and\n     * weird ways.\n     *\n     * Unlike several other options, this may _not_ be overridden by\n     * passing an option to `set()`, for performance reasons.\n     *\n     * The `reason` will be one of the following strings, corresponding\n     * to the reason for the item's deletion:\n     *\n     * - `evict` Item was evicted to make space for a new addition\n     * - `set` Item was overwritten by a new value\n     * - `expire` Item expired its TTL\n     * - `fetch` Item was deleted due to a failed or aborted fetch, or a\n     *   fetchMethod returning `undefined.\n     * - `delete` Item was removed by explicit `cache.delete(key)`,\n     *   `cache.clear()`, or `cache.set(key, undefined)`.\n     */\n    dispose?: Disposer<K, V>\n\n    /**\n     * The same as {@link OptionsBase.dispose}, but called *after* the entry\n     * is completely removed and the cache is once again in a clean state.\n     *\n     * It is safe to add an item right back into the cache at this point.\n     * However, note that it is *very* easy to inadvertently create infinite\n     * recursion this way.\n     */\n    disposeAfter?: Disposer<K, V>\n\n    /**\n     * Set to true to suppress calling the\n     * {@link OptionsBase.dispose} function if the entry key is\n     * still accessible within the cache.\n     *\n     * This may be overridden by passing an options object to\n     * {@link LRUCache#set}.\n     *\n     * Only relevant if `dispose` or `disposeAfter` are set.\n     */\n    noDisposeOnSet?: boolean\n\n    /**\n     * Boolean flag to tell the cache to not update the TTL when setting a new\n     * value for an existing key (ie, when updating a value rather than\n     * inserting a new value).  Note that the TTL value is _always_ set (if\n     * provided) when adding a new entry into the cache.\n     *\n     * Has no effect if a {@link OptionsBase.ttl} is not set.\n     *\n     * May be passed as an option to {@link LRUCache#set}.\n     */\n    noUpdateTTL?: boolean\n\n    /**\n     * Set to a positive integer to track the sizes of items added to the\n     * cache, and automatically evict items in order to stay below this size.\n     * Note that this may result in fewer than `max` items being stored.\n     *\n     * Attempting to add an item to the cache whose calculated size is greater\n     * that this amount will be a no-op. The item will not be cached, and no\n     * other items will be evicted.\n     *\n     * Optional, must be a positive integer if provided.\n     *\n     * Sets `maxEntrySize` to the same value, unless a different value is\n     * provided for `maxEntrySize`.\n     *\n     * At least one of `max`, `maxSize`, or `TTL` is required. This must be a\n     * positive integer if set.\n     *\n     * Even if size tracking is enabled, **it is strongly recommended to set a\n     * `max` to prevent unbounded growth of the cache.**\n     *\n     * Note also that size tracking can negatively impact performance,\n     * though for most cases, only minimally.\n     */\n    maxSize?: Size\n\n    /**\n     * The maximum allowed size for any single item in the cache.\n     *\n     * If a larger item is passed to {@link LRUCache#set} or returned by a\n     * {@link OptionsBase.fetchMethod} or {@link OptionsBase.memoMethod}, then\n     * it will not be stored in the cache.\n     *\n     * Attempting to add an item whose calculated size is greater than\n     * this amount will not cache the item or evict any old items, but\n     * WILL delete an existing value if one is already present.\n     *\n     * Optional, must be a positive integer if provided. Defaults to\n     * the value of `maxSize` if provided.\n     */\n    maxEntrySize?: Size\n\n    /**\n     * A function that returns a number indicating the item's size.\n     *\n     * Requires {@link OptionsBase.maxSize} to be set.\n     *\n     * If not provided, and {@link OptionsBase.maxSize} or\n     * {@link OptionsBase.maxEntrySize} are set, then all\n     * {@link LRUCache#set} calls **must** provide an explicit\n     * {@link SetOptions.size} or sizeCalculation param.\n     */\n    sizeCalculation?: SizeCalculator<K, V>\n\n    /**\n     * Method that provides the implementation for {@link LRUCache#fetch}\n     *\n     * ```ts\n     * fetchMethod(key, staleValue, { signal, options, context })\n     * ```\n     *\n     * If `fetchMethod` is not provided, then `cache.fetch(key)` is equivalent\n     * to `Promise.resolve(cache.get(key))`.\n     *\n     * If at any time, `signal.aborted` is set to `true`, or if the\n     * `signal.onabort` method is called, or if it emits an `'abort'` event\n     * which you can listen to with `addEventListener`, then that means that\n     * the fetch should be abandoned. This may be passed along to async\n     * functions aware of AbortController/AbortSignal behavior.\n     *\n     * The `fetchMethod` should **only** return `undefined` or a Promise\n     * resolving to `undefined` if the AbortController signaled an `abort`\n     * event. In all other cases, it should return or resolve to a value\n     * suitable for adding to the cache.\n     *\n     * The `options` object is a union of the options that may be provided to\n     * `set()` and `get()`. If they are modified, then that will result in\n     * modifying the settings to `cache.set()` when the value is resolved, and\n     * in the case of\n     * {@link OptionsBase.noDeleteOnFetchRejection} and\n     * {@link OptionsBase.allowStaleOnFetchRejection}, the handling of\n     * `fetchMethod` failures.\n     *\n     * For example, a DNS cache may update the TTL based on the value returned\n     * from a remote DNS server by changing `options.ttl` in the `fetchMethod`.\n     */\n    fetchMethod?: Fetcher<K, V, FC>\n\n    /**\n     * Method that provides the implementation for {@link LRUCache#memo}\n     */\n    memoMethod?: Memoizer<K, V, FC>\n\n    /**\n     * Set to true to suppress the deletion of stale data when a\n     * {@link OptionsBase.fetchMethod} returns a rejected promise.\n     */\n    noDeleteOnFetchRejection?: boolean\n\n    /**\n     * Do not delete stale items when they are retrieved with\n     * {@link LRUCache#get}.\n     *\n     * Note that the `get` return value will still be `undefined`\n     * unless {@link OptionsBase.allowStale} is true.\n     *\n     * When using time-expiring entries with `ttl`, by default stale\n     * items will be removed from the cache when the key is accessed\n     * with `cache.get()`.\n     *\n     * Setting this option will cause stale items to remain in the cache, until\n     * they are explicitly deleted with `cache.delete(key)`, or retrieved with\n     * `noDeleteOnStaleGet` set to `false`.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     *\n     * Only relevant if a ttl is used.\n     */\n    noDeleteOnStaleGet?: boolean\n\n    /**\n     * Set to true to allow returning stale data when a\n     * {@link OptionsBase.fetchMethod} throws an error or returns a rejected\n     * promise.\n     *\n     * This differs from using {@link OptionsBase.allowStale} in that stale\n     * data will ONLY be returned in the case that the {@link LRUCache#fetch}\n     * fails, not any other times.\n     *\n     * If a `fetchMethod` fails, and there is no stale value available, the\n     * `fetch()` will resolve to `undefined`. Ie, all `fetchMethod` errors are\n     * suppressed.\n     *\n     * Implies `noDeleteOnFetchRejection`.\n     *\n     * This may be set in calls to `fetch()`, or defaulted on the constructor,\n     * or overridden by modifying the options object in the `fetchMethod`.\n     */\n    allowStaleOnFetchRejection?: boolean\n\n    /**\n     * Set to true to return a stale value from the cache when the\n     * `AbortSignal` passed to the {@link OptionsBase.fetchMethod} dispatches\n     * an `'abort'` event, whether user-triggered, or due to internal cache\n     * behavior.\n     *\n     * Unless {@link OptionsBase.ignoreFetchAbort} is also set, the underlying\n     * {@link OptionsBase.fetchMethod} will still be considered canceled, and\n     * any value it returns will be ignored and not cached.\n     *\n     * Caveat: since fetches are aborted when a new value is explicitly\n     * set in the cache, this can lead to fetch returning a stale value,\n     * since that was the fallback value _at the moment the `fetch()` was\n     * initiated_, even though the new updated value is now present in\n     * the cache.\n     *\n     * For example:\n     *\n     * ```ts\n     * const cache = new LRUCache<string, any>({\n     *   ttl: 100,\n     *   fetchMethod: async (url, oldValue, { signal }) =>  {\n     *     const res = await fetch(url, { signal })\n     *     return await res.json()\n     *   }\n     * })\n     * cache.set('https://example.com/', { some: 'data' })\n     * // 100ms go by...\n     * const result = cache.fetch('https://example.com/')\n     * cache.set('https://example.com/', { other: 'thing' })\n     * console.log(await result) // { some: 'data' }\n     * console.log(cache.get('https://example.com/')) // { other: 'thing' }\n     * ```\n     */\n    allowStaleOnFetchAbort?: boolean\n\n    /**\n     * Set to true to ignore the `abort` event emitted by the `AbortSignal`\n     * object passed to {@link OptionsBase.fetchMethod}, and still cache the\n     * resulting resolution value, as long as it is not `undefined`.\n     *\n     * When used on its own, this means aborted {@link LRUCache#fetch} calls\n     * are not immediately resolved or rejected when they are aborted, and\n     * instead take the full time to await.\n     *\n     * When used with {@link OptionsBase.allowStaleOnFetchAbort}, aborted\n     * {@link LRUCache#fetch} calls will resolve immediately to their stale\n     * cached value or `undefined`, and will continue to process and eventually\n     * update the cache when they resolve, as long as the resulting value is\n     * not `undefined`, thus supporting a \"return stale on timeout while\n     * refreshing\" mechanism by passing `AbortSignal.timeout(n)` as the signal.\n     *\n     * For example:\n     *\n     * ```ts\n     * const c = new LRUCache({\n     *   ttl: 100,\n     *   ignoreFetchAbort: true,\n     *   allowStaleOnFetchAbort: true,\n     *   fetchMethod: async (key, oldValue, { signal }) => {\n     *     // note: do NOT pass the signal to fetch()!\n     *     // let's say this fetch can take a long time.\n     *     const res = await fetch(`https://slow-backend-server/${key}`)\n     *     return await res.json()\n     *   },\n     * })\n     *\n     * // this will return the stale value after 100ms, while still\n     * // updating in the background for next time.\n     * const val = await c.fetch('key', { signal: AbortSignal.timeout(100) })\n     * ```\n     *\n     * **Note**: regardless of this setting, an `abort` event _is still\n     * emitted on the `AbortSignal` object_, so may result in invalid results\n     * when passed to other underlying APIs that use AbortSignals.\n     *\n     * This may be overridden in the {@link OptionsBase.fetchMethod} or the\n     * call to {@link LRUCache#fetch}.\n     */\n    ignoreFetchAbort?: boolean\n  }\n\n  export interface OptionsMaxLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    max: Count\n  }\n  export interface OptionsTTLLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    ttl: Milliseconds\n    ttlAutopurge: boolean\n  }\n  export interface OptionsSizeLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    maxSize: Size\n  }\n\n  /**\n   * The valid safe options for the {@link LRUCache} constructor\n   */\n  export type Options<K, V, FC> =\n    | OptionsMaxLimit<K, V, FC>\n    | OptionsSizeLimit<K, V, FC>\n    | OptionsTTLLimit<K, V, FC>\n\n  /**\n   * Entry objects used by {@link LRUCache#load} and {@link LRUCache#dump},\n   * and returned by {@link LRUCache#info}.\n   */\n  export interface Entry<V> {\n    value: V\n    ttl?: Milliseconds\n    size?: Size\n    start?: Milliseconds\n  }\n}\n\n/**\n * Default export, the thing you're using this module to get.\n *\n * The `K` and `V` types define the key and value types, respectively. The\n * optional `FC` type defines the type of the `context` object passed to\n * `cache.fetch()` and `cache.memo()`.\n *\n * Keys and values **must not** be `null` or `undefined`.\n *\n * All properties from the options object (with the exception of `max`,\n * `maxSize`, `fetchMethod`, `memoMethod`, `dispose` and `disposeAfter`) are\n * added as normal public members. (The listed options are read-only getters.)\n *\n * Changing any of these will alter the defaults for subsequent method calls.\n */\nexport class LRUCache<K extends {}, V extends {}, FC = unknown>\n  implements Map<K, V>\n{\n  // options that cannot be changed without disaster\n  readonly #max: LRUCache.Count\n  readonly #maxSize: LRUCache.Size\n  readonly #dispose?: LRUCache.Disposer<K, V>\n  readonly #disposeAfter?: LRUCache.Disposer<K, V>\n  readonly #fetchMethod?: LRUCache.Fetcher<K, V, FC>\n  readonly #memoMethod?: LRUCache.Memoizer<K, V, FC>\n\n  /**\n   * {@link LRUCache.OptionsBase.ttl}\n   */\n  ttl: LRUCache.Milliseconds\n\n  /**\n   * {@link LRUCache.OptionsBase.ttlResolution}\n   */\n  ttlResolution: LRUCache.Milliseconds\n  /**\n   * {@link LRUCache.OptionsBase.ttlAutopurge}\n   */\n  ttlAutopurge: boolean\n  /**\n   * {@link LRUCache.OptionsBase.updateAgeOnGet}\n   */\n  updateAgeOnGet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.updateAgeOnHas}\n   */\n  updateAgeOnHas: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStale}\n   */\n  allowStale: boolean\n\n  /**\n   * {@link LRUCache.OptionsBase.noDisposeOnSet}\n   */\n  noDisposeOnSet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.noUpdateTTL}\n   */\n  noUpdateTTL: boolean\n  /**\n   * {@link LRUCache.OptionsBase.maxEntrySize}\n   */\n  maxEntrySize: LRUCache.Size\n  /**\n   * {@link LRUCache.OptionsBase.sizeCalculation}\n   */\n  sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  /**\n   * {@link LRUCache.OptionsBase.noDeleteOnFetchRejection}\n   */\n  noDeleteOnFetchRejection: boolean\n  /**\n   * {@link LRUCache.OptionsBase.noDeleteOnStaleGet}\n   */\n  noDeleteOnStaleGet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort}\n   */\n  allowStaleOnFetchAbort: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchRejection}\n   */\n  allowStaleOnFetchRejection: boolean\n  /**\n   * {@link LRUCache.OptionsBase.ignoreFetchAbort}\n   */\n  ignoreFetchAbort: boolean\n\n  // computed properties\n  #size: LRUCache.Count\n  #calculatedSize: LRUCache.Size\n  #keyMap: Map<K, Index>\n  #keyList: (K | undefined)[]\n  #valList: (V | BackgroundFetch<V> | undefined)[]\n  #next: NumberArray\n  #prev: NumberArray\n  #head: Index\n  #tail: Index\n  #free: StackLike\n  #disposed?: DisposeTask<K, V>[]\n  #sizes?: ZeroArray\n  #starts?: ZeroArray\n  #ttls?: ZeroArray\n\n  #hasDispose: boolean\n  #hasFetchMethod: boolean\n  #hasDisposeAfter: boolean\n\n  /**\n   * Do not call this method unless you need to inspect the\n   * inner workings of the cache.  If anything returned by this\n   * object is modified in any way, strange breakage may occur.\n   *\n   * These fields are private for a reason!\n   *\n   * @internal\n   */\n  static unsafeExposeInternals<\n    K extends {},\n    V extends {},\n    FC extends unknown = unknown\n  >(c: LRUCache<K, V, FC>) {\n    return {\n      // properties\n      starts: c.#starts,\n      ttls: c.#ttls,\n      sizes: c.#sizes,\n      keyMap: c.#keyMap as Map<K, number>,\n      keyList: c.#keyList,\n      valList: c.#valList,\n      next: c.#next,\n      prev: c.#prev,\n      get head() {\n        return c.#head\n      },\n      get tail() {\n        return c.#tail\n      },\n      free: c.#free,\n      // methods\n      isBackgroundFetch: (p: any) => c.#isBackgroundFetch(p),\n      backgroundFetch: (\n        k: K,\n        index: number | undefined,\n        options: LRUCache.FetchOptions<K, V, FC>,\n        context: any\n      ): BackgroundFetch<V> =>\n        c.#backgroundFetch(\n          k,\n          index as Index | undefined,\n          options,\n          context\n        ),\n      moveToTail: (index: number): void =>\n        c.#moveToTail(index as Index),\n      indexes: (options?: { allowStale: boolean }) =>\n        c.#indexes(options),\n      rindexes: (options?: { allowStale: boolean }) =>\n        c.#rindexes(options),\n      isStale: (index: number | undefined) =>\n        c.#isStale(index as Index),\n    }\n  }\n\n  // Protected read-only members\n\n  /**\n   * {@link LRUCache.OptionsBase.max} (read-only)\n   */\n  get max(): LRUCache.Count {\n    return this.#max\n  }\n  /**\n   * {@link LRUCache.OptionsBase.maxSize} (read-only)\n   */\n  get maxSize(): LRUCache.Count {\n    return this.#maxSize\n  }\n  /**\n   * The total computed size of items in the cache (read-only)\n   */\n  get calculatedSize(): LRUCache.Size {\n    return this.#calculatedSize\n  }\n  /**\n   * The number of items stored in the cache (read-only)\n   */\n  get size(): LRUCache.Count {\n    return this.#size\n  }\n  /**\n   * {@link LRUCache.OptionsBase.fetchMethod} (read-only)\n   */\n  get fetchMethod(): LRUCache.Fetcher<K, V, FC> | undefined {\n    return this.#fetchMethod\n  }\n  get memoMethod(): LRUCache.Memoizer<K, V, FC> | undefined {\n    return this.#memoMethod\n  }\n  /**\n   * {@link LRUCache.OptionsBase.dispose} (read-only)\n   */\n  get dispose() {\n    return this.#dispose\n  }\n  /**\n   * {@link LRUCache.OptionsBase.disposeAfter} (read-only)\n   */\n  get disposeAfter() {\n    return this.#disposeAfter\n  }\n\n  constructor(\n    options: LRUCache.Options<K, V, FC> | LRUCache<K, V, FC>\n  ) {\n    const {\n      max = 0,\n      ttl,\n      ttlResolution = 1,\n      ttlAutopurge,\n      updateAgeOnGet,\n      updateAgeOnHas,\n      allowStale,\n      dispose,\n      disposeAfter,\n      noDisposeOnSet,\n      noUpdateTTL,\n      maxSize = 0,\n      maxEntrySize = 0,\n      sizeCalculation,\n      fetchMethod,\n      memoMethod,\n      noDeleteOnFetchRejection,\n      noDeleteOnStaleGet,\n      allowStaleOnFetchRejection,\n      allowStaleOnFetchAbort,\n      ignoreFetchAbort,\n    } = options\n\n    if (max !== 0 && !isPosInt(max)) {\n      throw new TypeError('max option must be a nonnegative integer')\n    }\n\n    const UintArray = max ? getUintArray(max) : Array\n    if (!UintArray) {\n      throw new Error('invalid max value: ' + max)\n    }\n\n    this.#max = max\n    this.#maxSize = maxSize\n    this.maxEntrySize = maxEntrySize || this.#maxSize\n    this.sizeCalculation = sizeCalculation\n    if (this.sizeCalculation) {\n      if (!this.#maxSize && !this.maxEntrySize) {\n        throw new TypeError(\n          'cannot set sizeCalculation without setting maxSize or maxEntrySize'\n        )\n      }\n      if (typeof this.sizeCalculation !== 'function') {\n        throw new TypeError('sizeCalculation set to non-function')\n      }\n    }\n\n    if (\n      memoMethod !== undefined &&\n      typeof memoMethod !== 'function'\n    ) {\n      throw new TypeError('memoMethod must be a function if defined')\n    }\n    this.#memoMethod = memoMethod\n\n    if (\n      fetchMethod !== undefined &&\n      typeof fetchMethod !== 'function'\n    ) {\n      throw new TypeError(\n        'fetchMethod must be a function if specified'\n      )\n    }\n    this.#fetchMethod = fetchMethod\n    this.#hasFetchMethod = !!fetchMethod\n\n    this.#keyMap = new Map()\n    this.#keyList = new Array(max).fill(undefined)\n    this.#valList = new Array(max).fill(undefined)\n    this.#next = new UintArray(max)\n    this.#prev = new UintArray(max)\n    this.#head = 0 as Index\n    this.#tail = 0 as Index\n    this.#free = Stack.create(max)\n    this.#size = 0\n    this.#calculatedSize = 0\n\n    if (typeof dispose === 'function') {\n      this.#dispose = dispose\n    }\n    if (typeof disposeAfter === 'function') {\n      this.#disposeAfter = disposeAfter\n      this.#disposed = []\n    } else {\n      this.#disposeAfter = undefined\n      this.#disposed = undefined\n    }\n    this.#hasDispose = !!this.#dispose\n    this.#hasDisposeAfter = !!this.#disposeAfter\n\n    this.noDisposeOnSet = !!noDisposeOnSet\n    this.noUpdateTTL = !!noUpdateTTL\n    this.noDeleteOnFetchRejection = !!noDeleteOnFetchRejection\n    this.allowStaleOnFetchRejection = !!allowStaleOnFetchRejection\n    this.allowStaleOnFetchAbort = !!allowStaleOnFetchAbort\n    this.ignoreFetchAbort = !!ignoreFetchAbort\n\n    // NB: maxEntrySize is set to maxSize if it's set\n    if (this.maxEntrySize !== 0) {\n      if (this.#maxSize !== 0) {\n        if (!isPosInt(this.#maxSize)) {\n          throw new TypeError(\n            'maxSize must be a positive integer if specified'\n          )\n        }\n      }\n      if (!isPosInt(this.maxEntrySize)) {\n        throw new TypeError(\n          'maxEntrySize must be a positive integer if specified'\n        )\n      }\n      this.#initializeSizeTracking()\n    }\n\n    this.allowStale = !!allowStale\n    this.noDeleteOnStaleGet = !!noDeleteOnStaleGet\n    this.updateAgeOnGet = !!updateAgeOnGet\n    this.updateAgeOnHas = !!updateAgeOnHas\n    this.ttlResolution =\n      isPosInt(ttlResolution) || ttlResolution === 0\n        ? ttlResolution\n        : 1\n    this.ttlAutopurge = !!ttlAutopurge\n    this.ttl = ttl || 0\n    if (this.ttl) {\n      if (!isPosInt(this.ttl)) {\n        throw new TypeError(\n          'ttl must be a positive integer if specified'\n        )\n      }\n      this.#initializeTTLTracking()\n    }\n\n    // do not allow completely unbounded caches\n    if (this.#max === 0 && this.ttl === 0 && this.#maxSize === 0) {\n      throw new TypeError(\n        'At least one of max, maxSize, or ttl is required'\n      )\n    }\n    if (!this.ttlAutopurge && !this.#max && !this.#maxSize) {\n      const code = 'LRU_CACHE_UNBOUNDED'\n      if (shouldWarn(code)) {\n        warned.add(code)\n        const msg =\n          'TTL caching without ttlAutopurge, max, or maxSize can ' +\n          'result in unbounded memory consumption.'\n        emitWarning(msg, 'UnboundedCacheWarning', code, LRUCache)\n      }\n    }\n  }\n\n  /**\n   * Return the number of ms left in the item's TTL. If item is not in cache,\n   * returns `0`. Returns `Infinity` if item is in cache without a defined TTL.\n   */\n  getRemainingTTL(key: K) {\n    return this.#keyMap.has(key) ? Infinity : 0\n  }\n\n  #initializeTTLTracking() {\n    const ttls = new ZeroArray(this.#max)\n    const starts = new ZeroArray(this.#max)\n    this.#ttls = ttls\n    this.#starts = starts\n\n    this.#setItemTTL = (index, ttl, start = perf.now()) => {\n      starts[index] = ttl !== 0 ? start : 0\n      ttls[index] = ttl\n      if (ttl !== 0 && this.ttlAutopurge) {\n        const t = setTimeout(() => {\n          if (this.#isStale(index)) {\n            this.#delete(this.#keyList[index] as K, 'expire')\n          }\n        }, ttl + 1)\n        // unref() not supported on all platforms\n        /* c8 ignore start */\n        if (t.unref) {\n          t.unref()\n        }\n        /* c8 ignore stop */\n      }\n    }\n\n    this.#updateItemAge = index => {\n      starts[index] = ttls[index] !== 0 ? perf.now() : 0\n    }\n\n    this.#statusTTL = (status, index) => {\n      if (ttls[index]) {\n        const ttl = ttls[index]\n        const start = starts[index]\n        /* c8 ignore next */\n        if (!ttl || !start) return\n        status.ttl = ttl\n        status.start = start\n        status.now = cachedNow || getNow()\n        const age = status.now - start\n        status.remainingTTL = ttl - age\n      }\n    }\n\n    // debounce calls to perf.now() to 1s so we're not hitting\n    // that costly call repeatedly.\n    let cachedNow = 0\n    const getNow = () => {\n      const n = perf.now()\n      if (this.ttlResolution > 0) {\n        cachedNow = n\n        const t = setTimeout(\n          () => (cachedNow = 0),\n          this.ttlResolution\n        )\n        // not available on all platforms\n        /* c8 ignore start */\n        if (t.unref) {\n          t.unref()\n        }\n        /* c8 ignore stop */\n      }\n      return n\n    }\n\n    this.getRemainingTTL = key => {\n      const index = this.#keyMap.get(key)\n      if (index === undefined) {\n        return 0\n      }\n      const ttl = ttls[index]\n      const start = starts[index]\n      if (!ttl || !start) {\n        return Infinity\n      }\n      const age = (cachedNow || getNow()) - start\n      return ttl - age\n    }\n\n    this.#isStale = index => {\n      const s = starts[index]\n      const t = ttls[index]\n      return !!t && !!s && (cachedNow || getNow()) - s > t\n    }\n  }\n\n  // conditionally set private methods related to TTL\n  #updateItemAge: (index: Index) => void = () => {}\n  #statusTTL: (status: LRUCache.Status<V>, index: Index) => void =\n    () => {}\n  #setItemTTL: (\n    index: Index,\n    ttl: LRUCache.Milliseconds,\n    start?: LRUCache.Milliseconds\n    // ignore because we never call this if we're not already in TTL mode\n    /* c8 ignore start */\n  ) => void = () => {}\n  /* c8 ignore stop */\n\n  #isStale: (index: Index) => boolean = () => false\n\n  #initializeSizeTracking() {\n    const sizes = new ZeroArray(this.#max)\n    this.#calculatedSize = 0\n    this.#sizes = sizes\n    this.#removeItemSize = index => {\n      this.#calculatedSize -= sizes[index] as number\n      sizes[index] = 0\n    }\n    this.#requireSize = (k, v, size, sizeCalculation) => {\n      // provisionally accept background fetches.\n      // actual value size will be checked when they return.\n      if (this.#isBackgroundFetch(v)) {\n        return 0\n      }\n      if (!isPosInt(size)) {\n        if (sizeCalculation) {\n          if (typeof sizeCalculation !== 'function') {\n            throw new TypeError('sizeCalculation must be a function')\n          }\n          size = sizeCalculation(v, k)\n          if (!isPosInt(size)) {\n            throw new TypeError(\n              'sizeCalculation return invalid (expect positive integer)'\n            )\n          }\n        } else {\n          throw new TypeError(\n            'invalid size value (must be positive integer). ' +\n              'When maxSize or maxEntrySize is used, sizeCalculation ' +\n              'or size must be set.'\n          )\n        }\n      }\n      return size\n    }\n    this.#addItemSize = (\n      index: Index,\n      size: LRUCache.Size,\n      status?: LRUCache.Status<V>\n    ) => {\n      sizes[index] = size\n      if (this.#maxSize) {\n        const maxSize = this.#maxSize - (sizes[index] as number)\n        while (this.#calculatedSize > maxSize) {\n          this.#evict(true)\n        }\n      }\n      this.#calculatedSize += sizes[index] as number\n      if (status) {\n        status.entrySize = size\n        status.totalCalculatedSize = this.#calculatedSize\n      }\n    }\n  }\n\n  #removeItemSize: (index: Index) => void = _i => {}\n  #addItemSize: (\n    index: Index,\n    size: LRUCache.Size,\n    status?: LRUCache.Status<V>\n  ) => void = (_i, _s, _st) => {}\n  #requireSize: (\n    k: K,\n    v: V | BackgroundFetch<V>,\n    size?: LRUCache.Size,\n    sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  ) => LRUCache.Size = (\n    _k: K,\n    _v: V | BackgroundFetch<V>,\n    size?: LRUCache.Size,\n    sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  ) => {\n    if (size || sizeCalculation) {\n      throw new TypeError(\n        'cannot set size without setting maxSize or maxEntrySize on cache'\n      )\n    }\n    return 0\n  };\n\n  *#indexes({ allowStale = this.allowStale } = {}) {\n    if (this.#size) {\n      for (let i = this.#tail; true; ) {\n        if (!this.#isValidIndex(i)) {\n          break\n        }\n        if (allowStale || !this.#isStale(i)) {\n          yield i\n        }\n        if (i === this.#head) {\n          break\n        } else {\n          i = this.#prev[i] as Index\n        }\n      }\n    }\n  }\n\n  *#rindexes({ allowStale = this.allowStale } = {}) {\n    if (this.#size) {\n      for (let i = this.#head; true; ) {\n        if (!this.#isValidIndex(i)) {\n          break\n        }\n        if (allowStale || !this.#isStale(i)) {\n          yield i\n        }\n        if (i === this.#tail) {\n          break\n        } else {\n          i = this.#next[i] as Index\n        }\n      }\n    }\n  }\n\n  #isValidIndex(index: Index) {\n    return (\n      index !== undefined &&\n      this.#keyMap.get(this.#keyList[index] as K) === index\n    )\n  }\n\n  /**\n   * Return a generator yielding `[key, value]` pairs,\n   * in order from most recently used to least recently used.\n   */\n  *entries() {\n    for (const i of this.#indexes()) {\n      if (\n        this.#valList[i] !== undefined &&\n        this.#keyList[i] !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield [this.#keyList[i], this.#valList[i]] as [K, V]\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.entries}\n   *\n   * Return a generator yielding `[key, value]` pairs,\n   * in order from least recently used to most recently used.\n   */\n  *rentries() {\n    for (const i of this.#rindexes()) {\n      if (\n        this.#valList[i] !== undefined &&\n        this.#keyList[i] !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield [this.#keyList[i], this.#valList[i]]\n      }\n    }\n  }\n\n  /**\n   * Return a generator yielding the keys in the cache,\n   * in order from most recently used to least recently used.\n   */\n  *keys() {\n    for (const i of this.#indexes()) {\n      const k = this.#keyList[i]\n      if (\n        k !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield k\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.keys}\n   *\n   * Return a generator yielding the keys in the cache,\n   * in order from least recently used to most recently used.\n   */\n  *rkeys() {\n    for (const i of this.#rindexes()) {\n      const k = this.#keyList[i]\n      if (\n        k !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield k\n      }\n    }\n  }\n\n  /**\n   * Return a generator yielding the values in the cache,\n   * in order from most recently used to least recently used.\n   */\n  *values() {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      if (\n        v !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield this.#valList[i] as V\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.values}\n   *\n   * Return a generator yielding the values in the cache,\n   * in order from least recently used to most recently used.\n   */\n  *rvalues() {\n    for (const i of this.#rindexes()) {\n      const v = this.#valList[i]\n      if (\n        v !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield this.#valList[i]\n      }\n    }\n  }\n\n  /**\n   * Iterating over the cache itself yields the same results as\n   * {@link LRUCache.entries}\n   */\n  [Symbol.iterator]() {\n    return this.entries()\n  }\n\n  /**\n   * A String value that is used in the creation of the default string\n   * description of an object. Called by the built-in method\n   * `Object.prototype.toString`.\n   */\n  [Symbol.toStringTag] = 'LRUCache'\n\n  /**\n   * Find a value for which the supplied fn method returns a truthy value,\n   * similar to `Array.find()`. fn is called as `fn(value, key, cache)`.\n   */\n  find(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => boolean,\n    getOptions: LRUCache.GetOptions<K, V, FC> = {}\n  ) {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      if (fn(value, this.#keyList[i] as K, this)) {\n        return this.get(this.#keyList[i] as K, getOptions)\n      }\n    }\n  }\n\n  /**\n   * Call the supplied function on each item in the cache, in order from most\n   * recently used to least recently used.\n   *\n   * `fn` is called as `fn(value, key, cache)`.\n   *\n   * If `thisp` is provided, function will be called in the `this`-context of\n   * the provided object, or the cache if no `thisp` object is provided.\n   *\n   * Does not update age or recenty of use, or iterate over stale values.\n   */\n  forEach(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any,\n    thisp: any = this\n  ) {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      fn.call(thisp, value, this.#keyList[i] as K, this)\n    }\n  }\n\n  /**\n   * The same as {@link LRUCache.forEach} but items are iterated over in\n   * reverse order.  (ie, less recently used items are iterated over first.)\n   */\n  rforEach(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any,\n    thisp: any = this\n  ) {\n    for (const i of this.#rindexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      fn.call(thisp, value, this.#keyList[i] as K, this)\n    }\n  }\n\n  /**\n   * Delete any stale entries. Returns true if anything was removed,\n   * false otherwise.\n   */\n  purgeStale() {\n    let deleted = false\n    for (const i of this.#rindexes({ allowStale: true })) {\n      if (this.#isStale(i)) {\n        this.#delete(this.#keyList[i] as K, 'expire')\n        deleted = true\n      }\n    }\n    return deleted\n  }\n\n  /**\n   * Get the extended info about a given entry, to get its value, size, and\n   * TTL info simultaneously. Returns `undefined` if the key is not present.\n   *\n   * Unlike {@link LRUCache#dump}, which is designed to be portable and survive\n   * serialization, the `start` value is always the current timestamp, and the\n   * `ttl` is a calculated remaining time to live (negative if expired).\n   *\n   * Always returns stale values, if their info is found in the cache, so be\n   * sure to check for expirations (ie, a negative {@link LRUCache.Entry#ttl})\n   * if relevant.\n   */\n  info(key: K): LRUCache.Entry<V> | undefined {\n    const i = this.#keyMap.get(key)\n    if (i === undefined) return undefined\n    const v = this.#valList[i]\n    const value: V | undefined = this.#isBackgroundFetch(v)\n      ? v.__staleWhileFetching\n      : v\n    if (value === undefined) return undefined\n    const entry: LRUCache.Entry<V> = { value }\n    if (this.#ttls && this.#starts) {\n      const ttl = this.#ttls[i]\n      const start = this.#starts[i]\n      if (ttl && start) {\n        const remain = ttl - (perf.now() - start)\n        entry.ttl = remain\n        entry.start = Date.now()\n      }\n    }\n    if (this.#sizes) {\n      entry.size = this.#sizes[i]\n    }\n    return entry\n  }\n\n  /**\n   * Return an array of [key, {@link LRUCache.Entry}] tuples which can be\n   * passed to {@link LRLUCache#load}.\n   *\n   * The `start` fields are calculated relative to a portable `Date.now()`\n   * timestamp, even if `performance.now()` is available.\n   *\n   * Stale entries are always included in the `dump`, even if\n   * {@link LRUCache.OptionsBase.allowStale} is false.\n   *\n   * Note: this returns an actual array, not a generator, so it can be more\n   * easily passed around.\n   */\n  dump() {\n    const arr: [K, LRUCache.Entry<V>][] = []\n    for (const i of this.#indexes({ allowStale: true })) {\n      const key = this.#keyList[i]\n      const v = this.#valList[i]\n      const value: V | undefined = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined || key === undefined) continue\n      const entry: LRUCache.Entry<V> = { value }\n      if (this.#ttls && this.#starts) {\n        entry.ttl = this.#ttls[i]\n        // always dump the start relative to a portable timestamp\n        // it's ok for this to be a bit slow, it's a rare operation.\n        const age = perf.now() - (this.#starts[i] as number)\n        entry.start = Math.floor(Date.now() - age)\n      }\n      if (this.#sizes) {\n        entry.size = this.#sizes[i]\n      }\n      arr.unshift([key, entry])\n    }\n    return arr\n  }\n\n  /**\n   * Reset the cache and load in the items in entries in the order listed.\n   *\n   * The shape of the resulting cache may be different if the same options are\n   * not used in both caches.\n   *\n   * The `start` fields are assumed to be calculated relative to a portable\n   * `Date.now()` timestamp, even if `performance.now()` is available.\n   */\n  load(arr: [K, LRUCache.Entry<V>][]) {\n    this.clear()\n    for (const [key, entry] of arr) {\n      if (entry.start) {\n        // entry.start is a portable timestamp, but we may be using\n        // node's performance.now(), so calculate the offset, so that\n        // we get the intended remaining TTL, no matter how long it's\n        // been on ice.\n        //\n        // it's ok for this to be a bit slow, it's a rare operation.\n        const age = Date.now() - entry.start\n        entry.start = perf.now() - age\n      }\n      this.set(key, entry.value, entry)\n    }\n  }\n\n  /**\n   * Add a value to the cache.\n   *\n   * Note: if `undefined` is specified as a value, this is an alias for\n   * {@link LRUCache#delete}\n   *\n   * Fields on the {@link LRUCache.SetOptions} options param will override\n   * their corresponding values in the constructor options for the scope\n   * of this single `set()` operation.\n   *\n   * If `start` is provided, then that will set the effective start\n   * time for the TTL calculation. Note that this must be a previous\n   * value of `performance.now()` if supported, or a previous value of\n   * `Date.now()` if not.\n   *\n   * Options object may also include `size`, which will prevent\n   * calling the `sizeCalculation` function and just use the specified\n   * number if it is a positive integer, and `noDisposeOnSet` which\n   * will prevent calling a `dispose` function in the case of\n   * overwrites.\n   *\n   * If the `size` (or return value of `sizeCalculation`) for a given\n   * entry is greater than `maxEntrySize`, then the item will not be\n   * added to the cache.\n   *\n   * Will update the recency of the entry.\n   *\n   * If the value is `undefined`, then this is an alias for\n   * `cache.delete(key)`. `undefined` is never stored in the cache.\n   */\n  set(\n    k: K,\n    v: V | BackgroundFetch<V> | undefined,\n    setOptions: LRUCache.SetOptions<K, V, FC> = {}\n  ) {\n    if (v === undefined) {\n      this.delete(k)\n      return this\n    }\n    const {\n      ttl = this.ttl,\n      start,\n      noDisposeOnSet = this.noDisposeOnSet,\n      sizeCalculation = this.sizeCalculation,\n      status,\n    } = setOptions\n    let { noUpdateTTL = this.noUpdateTTL } = setOptions\n\n    const size = this.#requireSize(\n      k,\n      v,\n      setOptions.size || 0,\n      sizeCalculation\n    )\n    // if the item doesn't fit, don't do anything\n    // NB: maxEntrySize set to maxSize by default\n    if (this.maxEntrySize && size > this.maxEntrySize) {\n      if (status) {\n        status.set = 'miss'\n        status.maxEntrySizeExceeded = true\n      }\n      // have to delete, in case something is there already.\n      this.#delete(k, 'set')\n      return this\n    }\n    let index = this.#size === 0 ? undefined : this.#keyMap.get(k)\n    if (index === undefined) {\n      // addition\n      index = (\n        this.#size === 0\n          ? this.#tail\n          : this.#free.length !== 0\n          ? this.#free.pop()\n          : this.#size === this.#max\n          ? this.#evict(false)\n          : this.#size\n      ) as Index\n      this.#keyList[index] = k\n      this.#valList[index] = v\n      this.#keyMap.set(k, index)\n      this.#next[this.#tail] = index\n      this.#prev[index] = this.#tail\n      this.#tail = index\n      this.#size++\n      this.#addItemSize(index, size, status)\n      if (status) status.set = 'add'\n      noUpdateTTL = false\n    } else {\n      // update\n      this.#moveToTail(index)\n      const oldVal = this.#valList[index] as V | BackgroundFetch<V>\n      if (v !== oldVal) {\n        if (this.#hasFetchMethod && this.#isBackgroundFetch(oldVal)) {\n          oldVal.__abortController.abort(new Error('replaced'))\n          const { __staleWhileFetching: s } = oldVal\n          if (s !== undefined && !noDisposeOnSet) {\n            if (this.#hasDispose) {\n              this.#dispose?.(s as V, k, 'set')\n            }\n            if (this.#hasDisposeAfter) {\n              this.#disposed?.push([s as V, k, 'set'])\n            }\n          }\n        } else if (!noDisposeOnSet) {\n          if (this.#hasDispose) {\n            this.#dispose?.(oldVal as V, k, 'set')\n          }\n          if (this.#hasDisposeAfter) {\n            this.#disposed?.push([oldVal as V, k, 'set'])\n          }\n        }\n        this.#removeItemSize(index)\n        this.#addItemSize(index, size, status)\n        this.#valList[index] = v\n        if (status) {\n          status.set = 'replace'\n          const oldValue =\n            oldVal && this.#isBackgroundFetch(oldVal)\n              ? oldVal.__staleWhileFetching\n              : oldVal\n          if (oldValue !== undefined) status.oldValue = oldValue\n        }\n      } else if (status) {\n        status.set = 'update'\n      }\n    }\n    if (ttl !== 0 && !this.#ttls) {\n      this.#initializeTTLTracking()\n    }\n    if (this.#ttls) {\n      if (!noUpdateTTL) {\n        this.#setItemTTL(index, ttl, start)\n      }\n      if (status) this.#statusTTL(status, index)\n    }\n    if (!noDisposeOnSet && this.#hasDisposeAfter && this.#disposed) {\n      const dt = this.#disposed\n      let task: DisposeTask<K, V> | undefined\n      while ((task = dt?.shift())) {\n        this.#disposeAfter?.(...task)\n      }\n    }\n    return this\n  }\n\n  /**\n   * Evict the least recently used item, returning its value or\n   * `undefined` if cache is empty.\n   */\n  pop(): V | undefined {\n    try {\n      while (this.#size) {\n        const val = this.#valList[this.#head]\n        this.#evict(true)\n        if (this.#isBackgroundFetch(val)) {\n          if (val.__staleWhileFetching) {\n            return val.__staleWhileFetching\n          }\n        } else if (val !== undefined) {\n          return val\n        }\n      }\n    } finally {\n      if (this.#hasDisposeAfter && this.#disposed) {\n        const dt = this.#disposed\n        let task: DisposeTask<K, V> | undefined\n        while ((task = dt?.shift())) {\n          this.#disposeAfter?.(...task)\n        }\n      }\n    }\n  }\n\n  #evict(free: boolean) {\n    const head = this.#head\n    const k = this.#keyList[head] as K\n    const v = this.#valList[head] as V\n    if (this.#hasFetchMethod && this.#isBackgroundFetch(v)) {\n      v.__abortController.abort(new Error('evicted'))\n    } else if (this.#hasDispose || this.#hasDisposeAfter) {\n      if (this.#hasDispose) {\n        this.#dispose?.(v, k, 'evict')\n      }\n      if (this.#hasDisposeAfter) {\n        this.#disposed?.push([v, k, 'evict'])\n      }\n    }\n    this.#removeItemSize(head)\n    // if we aren't about to use the index, then null these out\n    if (free) {\n      this.#keyList[head] = undefined\n      this.#valList[head] = undefined\n      this.#free.push(head)\n    }\n    if (this.#size === 1) {\n      this.#head = this.#tail = 0 as Index\n      this.#free.length = 0\n    } else {\n      this.#head = this.#next[head] as Index\n    }\n    this.#keyMap.delete(k)\n    this.#size--\n    return head\n  }\n\n  /**\n   * Check if a key is in the cache, without updating the recency of use.\n   * Will return false if the item is stale, even though it is technically\n   * in the cache.\n   *\n   * Check if a key is in the cache, without updating the recency of\n   * use. Age is updated if {@link LRUCache.OptionsBase.updateAgeOnHas} is set\n   * to `true` in either the options or the constructor.\n   *\n   * Will return `false` if the item is stale, even though it is technically in\n   * the cache. The difference can be determined (if it matters) by using a\n   * `status` argument, and inspecting the `has` field.\n   *\n   * Will not update item age unless\n   * {@link LRUCache.OptionsBase.updateAgeOnHas} is set.\n   */\n  has(k: K, hasOptions: LRUCache.HasOptions<K, V, FC> = {}) {\n    const { updateAgeOnHas = this.updateAgeOnHas, status } =\n      hasOptions\n    const index = this.#keyMap.get(k)\n    if (index !== undefined) {\n      const v = this.#valList[index]\n      if (\n        this.#isBackgroundFetch(v) &&\n        v.__staleWhileFetching === undefined\n      ) {\n        return false\n      }\n      if (!this.#isStale(index)) {\n        if (updateAgeOnHas) {\n          this.#updateItemAge(index)\n        }\n        if (status) {\n          status.has = 'hit'\n          this.#statusTTL(status, index)\n        }\n        return true\n      } else if (status) {\n        status.has = 'stale'\n        this.#statusTTL(status, index)\n      }\n    } else if (status) {\n      status.has = 'miss'\n    }\n    return false\n  }\n\n  /**\n   * Like {@link LRUCache#get} but doesn't update recency or delete stale\n   * items.\n   *\n   * Returns `undefined` if the item is stale, unless\n   * {@link LRUCache.OptionsBase.allowStale} is set.\n   */\n  peek(k: K, peekOptions: LRUCache.PeekOptions<K, V, FC> = {}) {\n    const { allowStale = this.allowStale } = peekOptions\n    const index = this.#keyMap.get(k)\n    if (\n      index === undefined ||\n      (!allowStale && this.#isStale(index))\n    ) {\n      return\n    }\n    const v = this.#valList[index]\n    // either stale and allowed, or forcing a refresh of non-stale value\n    return this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v\n  }\n\n  #backgroundFetch(\n    k: K,\n    index: Index | undefined,\n    options: LRUCache.FetchOptions<K, V, FC>,\n    context: any\n  ): BackgroundFetch<V> {\n    const v = index === undefined ? undefined : this.#valList[index]\n    if (this.#isBackgroundFetch(v)) {\n      return v\n    }\n\n    const ac = new AC()\n    const { signal } = options\n    // when/if our AC signals, then stop listening to theirs.\n    signal?.addEventListener('abort', () => ac.abort(signal.reason), {\n      signal: ac.signal,\n    })\n\n    const fetchOpts = {\n      signal: ac.signal,\n      options,\n      context,\n    }\n\n    const cb = (\n      v: V | undefined,\n      updateCache = false\n    ): V | undefined => {\n      const { aborted } = ac.signal\n      const ignoreAbort = options.ignoreFetchAbort && v !== undefined\n      if (options.status) {\n        if (aborted && !updateCache) {\n          options.status.fetchAborted = true\n          options.status.fetchError = ac.signal.reason\n          if (ignoreAbort) options.status.fetchAbortIgnored = true\n        } else {\n          options.status.fetchResolved = true\n        }\n      }\n      if (aborted && !ignoreAbort && !updateCache) {\n        return fetchFail(ac.signal.reason)\n      }\n      // either we didn't abort, and are still here, or we did, and ignored\n      const bf = p as BackgroundFetch<V>\n      if (this.#valList[index as Index] === p) {\n        if (v === undefined) {\n          if (bf.__staleWhileFetching) {\n            this.#valList[index as Index] = bf.__staleWhileFetching\n          } else {\n            this.#delete(k, 'fetch')\n          }\n        } else {\n          if (options.status) options.status.fetchUpdated = true\n          this.set(k, v, fetchOpts.options)\n        }\n      }\n      return v\n    }\n\n    const eb = (er: any) => {\n      if (options.status) {\n        options.status.fetchRejected = true\n        options.status.fetchError = er\n      }\n      return fetchFail(er)\n    }\n\n    const fetchFail = (er: any): V | undefined => {\n      const { aborted } = ac.signal\n      const allowStaleAborted =\n        aborted && options.allowStaleOnFetchAbort\n      const allowStale =\n        allowStaleAborted || options.allowStaleOnFetchRejection\n      const noDelete = allowStale || options.noDeleteOnFetchRejection\n      const bf = p as BackgroundFetch<V>\n      if (this.#valList[index as Index] === p) {\n        // if we allow stale on fetch rejections, then we need to ensure that\n        // the stale value is not removed from the cache when the fetch fails.\n        const del = !noDelete || bf.__staleWhileFetching === undefined\n        if (del) {\n          this.#delete(k, 'fetch')\n        } else if (!allowStaleAborted) {\n          // still replace the *promise* with the stale value,\n          // since we are done with the promise at this point.\n          // leave it untouched if we're still waiting for an\n          // aborted background fetch that hasn't yet returned.\n          this.#valList[index as Index] = bf.__staleWhileFetching\n        }\n      }\n      if (allowStale) {\n        if (options.status && bf.__staleWhileFetching !== undefined) {\n          options.status.returnedStale = true\n        }\n        return bf.__staleWhileFetching\n      } else if (bf.__returned === bf) {\n        throw er\n      }\n    }\n\n    const pcall = (\n      res: (v: V | undefined) => void,\n      rej: (e: any) => void\n    ) => {\n      const fmp = this.#fetchMethod?.(k, v, fetchOpts)\n      if (fmp && fmp instanceof Promise) {\n        fmp.then(v => res(v === undefined ? undefined : v), rej)\n      }\n      // ignored, we go until we finish, regardless.\n      // defer check until we are actually aborting,\n      // so fetchMethod can override.\n      ac.signal.addEventListener('abort', () => {\n        if (\n          !options.ignoreFetchAbort ||\n          options.allowStaleOnFetchAbort\n        ) {\n          res(undefined)\n          // when it eventually resolves, update the cache.\n          if (options.allowStaleOnFetchAbort) {\n            res = v => cb(v, true)\n          }\n        }\n      })\n    }\n\n    if (options.status) options.status.fetchDispatched = true\n    const p = new Promise(pcall).then(cb, eb)\n    const bf: BackgroundFetch<V> = Object.assign(p, {\n      __abortController: ac,\n      __staleWhileFetching: v,\n      __returned: undefined,\n    })\n\n    if (index === undefined) {\n      // internal, don't expose status.\n      this.set(k, bf, { ...fetchOpts.options, status: undefined })\n      index = this.#keyMap.get(k)\n    } else {\n      this.#valList[index] = bf\n    }\n    return bf\n  }\n\n  #isBackgroundFetch(p: any): p is BackgroundFetch<V> {\n    if (!this.#hasFetchMethod) return false\n    const b = p as BackgroundFetch<V>\n    return (\n      !!b &&\n      b instanceof Promise &&\n      b.hasOwnProperty('__staleWhileFetching') &&\n      b.__abortController instanceof AC\n    )\n  }\n\n  /**\n   * Make an asynchronous cached fetch using the\n   * {@link LRUCache.OptionsBase.fetchMethod} function.\n   *\n   * If the value is in the cache and not stale, then the returned\n   * Promise resolves to the value.\n   *\n   * If not in the cache, or beyond its TTL staleness, then\n   * `fetchMethod(key, staleValue, { options, signal, context })` is\n   * called, and the value returned will be added to the cache once\n   * resolved.\n   *\n   * If called with `allowStale`, and an asynchronous fetch is\n   * currently in progress to reload a stale value, then the former\n   * stale value will be returned.\n   *\n   * If called with `forceRefresh`, then the cached item will be\n   * re-fetched, even if it is not stale. However, if `allowStale` is also\n   * set, then the old value will still be returned. This is useful\n   * in cases where you want to force a reload of a cached value. If\n   * a background fetch is already in progress, then `forceRefresh`\n   * has no effect.\n   *\n   * If multiple fetches for the same key are issued, then they will all be\n   * coalesced into a single call to fetchMethod.\n   *\n   * Note that this means that handling options such as\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort},\n   * {@link LRUCache.FetchOptions.signal},\n   * and {@link LRUCache.OptionsBase.allowStaleOnFetchRejection} will be\n   * determined by the FIRST fetch() call for a given key.\n   *\n   * This is a known (fixable) shortcoming which will be addresed on when\n   * someone complains about it, as the fix would involve added complexity and\n   * may not be worth the costs for this edge case.\n   *\n   * If {@link LRUCache.OptionsBase.fetchMethod} is not specified, then this is\n   * effectively an alias for `Promise.resolve(cache.get(key))`.\n   *\n   * When the fetch method resolves to a value, if the fetch has not\n   * been aborted due to deletion, eviction, or being overwritten,\n   * then it is added to the cache using the options provided.\n   *\n   * If the key is evicted or deleted before the `fetchMethod`\n   * resolves, then the AbortSignal passed to the `fetchMethod` will\n   * receive an `abort` event, and the promise returned by `fetch()`\n   * will reject with the reason for the abort.\n   *\n   * If a `signal` is passed to the `fetch()` call, then aborting the\n   * signal will abort the fetch and cause the `fetch()` promise to\n   * reject with the reason provided.\n   *\n   * **Setting `context`**\n   *\n   * If an `FC` type is set to a type other than `unknown`, `void`, or\n   * `undefined` in the {@link LRUCache} constructor, then all\n   * calls to `cache.fetch()` _must_ provide a `context` option. If\n   * set to `undefined` or `void`, then calls to fetch _must not_\n   * provide a `context` option.\n   *\n   * The `context` param allows you to provide arbitrary data that\n   * might be relevant in the course of fetching the data. It is only\n   * relevant for the course of a single `fetch()` operation, and\n   * discarded afterwards.\n   *\n   * **Note: `fetch()` calls are inflight-unique**\n   *\n   * If you call `fetch()` multiple times with the same key value,\n   * then every call after the first will resolve on the same\n   * promise<sup>1</sup>,\n   * _even if they have different settings that would otherwise change\n   * the behavior of the fetch_, such as `noDeleteOnFetchRejection`\n   * or `ignoreFetchAbort`.\n   *\n   * In most cases, this is not a problem (in fact, only fetching\n   * something once is what you probably want, if you're caching in\n   * the first place). If you are changing the fetch() options\n   * dramatically between runs, there's a good chance that you might\n   * be trying to fit divergent semantics into a single object, and\n   * would be better off with multiple cache instances.\n   *\n   * **1**: Ie, they're not the \"same Promise\", but they resolve at\n   * the same time, because they're both waiting on the same\n   * underlying fetchMethod response.\n   */\n\n  fetch(\n    k: K,\n    fetchOptions: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : LRUCache.FetchOptionsWithContext<K, V, FC>\n  ): Promise<undefined | V>\n\n  // this overload not allowed if context is required\n  fetch(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    fetchOptions?: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : never\n  ): Promise<undefined | V>\n\n  async fetch(\n    k: K,\n    fetchOptions: LRUCache.FetchOptions<K, V, FC> = {}\n  ): Promise<undefined | V> {\n    const {\n      // get options\n      allowStale = this.allowStale,\n      updateAgeOnGet = this.updateAgeOnGet,\n      noDeleteOnStaleGet = this.noDeleteOnStaleGet,\n      // set options\n      ttl = this.ttl,\n      noDisposeOnSet = this.noDisposeOnSet,\n      size = 0,\n      sizeCalculation = this.sizeCalculation,\n      noUpdateTTL = this.noUpdateTTL,\n      // fetch exclusive options\n      noDeleteOnFetchRejection = this.noDeleteOnFetchRejection,\n      allowStaleOnFetchRejection = this.allowStaleOnFetchRejection,\n      ignoreFetchAbort = this.ignoreFetchAbort,\n      allowStaleOnFetchAbort = this.allowStaleOnFetchAbort,\n      context,\n      forceRefresh = false,\n      status,\n      signal,\n    } = fetchOptions\n\n    if (!this.#hasFetchMethod) {\n      if (status) status.fetch = 'get'\n      return this.get(k, {\n        allowStale,\n        updateAgeOnGet,\n        noDeleteOnStaleGet,\n        status,\n      })\n    }\n\n    const options = {\n      allowStale,\n      updateAgeOnGet,\n      noDeleteOnStaleGet,\n      ttl,\n      noDisposeOnSet,\n      size,\n      sizeCalculation,\n      noUpdateTTL,\n      noDeleteOnFetchRejection,\n      allowStaleOnFetchRejection,\n      allowStaleOnFetchAbort,\n      ignoreFetchAbort,\n      status,\n      signal,\n    }\n\n    let index = this.#keyMap.get(k)\n    if (index === undefined) {\n      if (status) status.fetch = 'miss'\n      const p = this.#backgroundFetch(k, index, options, context)\n      return (p.__returned = p)\n    } else {\n      // in cache, maybe already fetching\n      const v = this.#valList[index]\n      if (this.#isBackgroundFetch(v)) {\n        const stale =\n          allowStale && v.__staleWhileFetching !== undefined\n        if (status) {\n          status.fetch = 'inflight'\n          if (stale) status.returnedStale = true\n        }\n        return stale ? v.__staleWhileFetching : (v.__returned = v)\n      }\n\n      // if we force a refresh, that means do NOT serve the cached value,\n      // unless we are already in the process of refreshing the cache.\n      const isStale = this.#isStale(index)\n      if (!forceRefresh && !isStale) {\n        if (status) status.fetch = 'hit'\n        this.#moveToTail(index)\n        if (updateAgeOnGet) {\n          this.#updateItemAge(index)\n        }\n        if (status) this.#statusTTL(status, index)\n        return v\n      }\n\n      // ok, it is stale or a forced refresh, and not already fetching.\n      // refresh the cache.\n      const p = this.#backgroundFetch(k, index, options, context)\n      const hasStale = p.__staleWhileFetching !== undefined\n      const staleVal = hasStale && allowStale\n      if (status) {\n        status.fetch = isStale ? 'stale' : 'refresh'\n        if (staleVal && isStale) status.returnedStale = true\n      }\n      return staleVal ? p.__staleWhileFetching : (p.__returned = p)\n    }\n  }\n\n  /**\n   * In some cases, `cache.fetch()` may resolve to `undefined`, either because\n   * a {@link LRUCache.OptionsBase#fetchMethod} was not provided (turning\n   * `cache.fetch(k)` into just an async wrapper around `cache.get(k)`) or\n   * because `ignoreFetchAbort` was specified (either to the constructor or\n   * in the {@link LRUCache.FetchOptions}). Also, the\n   * {@link OptionsBase.fetchMethod} may return `undefined` or `void`, making\n   * the test even more complicated.\n   *\n   * Because inferring the cases where `undefined` might be returned are so\n   * cumbersome, but testing for `undefined` can also be annoying, this method\n   * can be used, which will reject if `this.fetch()` resolves to undefined.\n   */\n  forceFetch(\n    k: K,\n    fetchOptions: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : LRUCache.FetchOptionsWithContext<K, V, FC>\n  ): Promise<V>\n  // this overload not allowed if context is required\n  forceFetch(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    fetchOptions?: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : never\n  ): Promise<V>\n  async forceFetch(\n    k: K,\n    fetchOptions: LRUCache.FetchOptions<K, V, FC> = {}\n  ): Promise<V> {\n    const v = await this.fetch(\n      k,\n      fetchOptions as unknown extends FC\n        ? LRUCache.FetchOptions<K, V, FC>\n        : FC extends undefined | void\n        ? LRUCache.FetchOptionsNoContext<K, V>\n        : LRUCache.FetchOptionsWithContext<K, V, FC>\n    )\n    if (v === undefined) throw new Error('fetch() returned undefined')\n    return v\n  }\n\n  /**\n   * If the key is found in the cache, then this is equivalent to\n   * {@link LRUCache#get}. If not, in the cache, then calculate the value using\n   * the {@link LRUCache.OptionsBase.memoMethod}, and add it to the cache.\n   *\n   * If an `FC` type is set to a type other than `unknown`, `void`, or\n   * `undefined` in the LRUCache constructor, then all calls to `cache.memo()`\n   * _must_ provide a `context` option. If set to `undefined` or `void`, then\n   * calls to memo _must not_ provide a `context` option.\n   *\n   * The `context` param allows you to provide arbitrary data that might be\n   * relevant in the course of fetching the data. It is only relevant for the\n   * course of a single `memo()` operation, and discarded afterwards.\n   */\n  memo(\n    k: K,\n    memoOptions: unknown extends FC\n      ? LRUCache.MemoOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.MemoOptionsNoContext<K, V>\n      : LRUCache.MemoOptionsWithContext<K, V, FC>\n  ): V\n  // this overload not allowed if context is required\n  memo(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    memoOptions?: unknown extends FC\n      ? LRUCache.MemoOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.MemoOptionsNoContext<K, V>\n      : never\n  ): V\n  memo(k: K, memoOptions: LRUCache.MemoOptions<K, V, FC> = {}) {\n    const memoMethod = this.#memoMethod\n    if (!memoMethod) {\n      throw new Error('no memoMethod provided to constructor')\n    }\n    const { context, forceRefresh, ...options } = memoOptions\n    const v = this.get(k, options)\n    if (!forceRefresh && v !== undefined) return v\n    const vv = memoMethod(k, v, {\n      options,\n      context,\n    } as LRUCache.MemoizerOptions<K, V, FC>)\n    this.set(k, vv, options)\n    return vv\n  }\n\n  /**\n   * Return a value from the cache. Will update the recency of the cache\n   * entry found.\n   *\n   * If the key is not found, get() will return `undefined`.\n   */\n  get(k: K, getOptions: LRUCache.GetOptions<K, V, FC> = {}) {\n    const {\n      allowStale = this.allowStale,\n      updateAgeOnGet = this.updateAgeOnGet,\n      noDeleteOnStaleGet = this.noDeleteOnStaleGet,\n      status,\n    } = getOptions\n    const index = this.#keyMap.get(k)\n    if (index !== undefined) {\n      const value = this.#valList[index]\n      const fetching = this.#isBackgroundFetch(value)\n      if (status) this.#statusTTL(status, index)\n      if (this.#isStale(index)) {\n        if (status) status.get = 'stale'\n        // delete only if not an in-flight background fetch\n        if (!fetching) {\n          if (!noDeleteOnStaleGet) {\n            this.#delete(k, 'expire')\n          }\n          if (status && allowStale) status.returnedStale = true\n          return allowStale ? value : undefined\n        } else {\n          if (\n            status &&\n            allowStale &&\n            value.__staleWhileFetching !== undefined\n          ) {\n            status.returnedStale = true\n          }\n          return allowStale ? value.__staleWhileFetching : undefined\n        }\n      } else {\n        if (status) status.get = 'hit'\n        // if we're currently fetching it, we don't actually have it yet\n        // it's not stale, which means this isn't a staleWhileRefetching.\n        // If it's not stale, and fetching, AND has a __staleWhileFetching\n        // value, then that means the user fetched with {forceRefresh:true},\n        // so it's safe to return that value.\n        if (fetching) {\n          return value.__staleWhileFetching\n        }\n        this.#moveToTail(index)\n        if (updateAgeOnGet) {\n          this.#updateItemAge(index)\n        }\n        return value\n      }\n    } else if (status) {\n      status.get = 'miss'\n    }\n  }\n\n  #connect(p: Index, n: Index) {\n    this.#prev[n] = p\n    this.#next[p] = n\n  }\n\n  #moveToTail(index: Index): void {\n    // if tail already, nothing to do\n    // if head, move head to next[index]\n    // else\n    //   move next[prev[index]] to next[index] (head has no prev)\n    //   move prev[next[index]] to prev[index]\n    // prev[index] = tail\n    // next[tail] = index\n    // tail = index\n    if (index !== this.#tail) {\n      if (index === this.#head) {\n        this.#head = this.#next[index] as Index\n      } else {\n        this.#connect(\n          this.#prev[index] as Index,\n          this.#next[index] as Index\n        )\n      }\n      this.#connect(this.#tail, index)\n      this.#tail = index\n    }\n  }\n\n  /**\n   * Deletes a key out of the cache.\n   *\n   * Returns true if the key was deleted, false otherwise.\n   */\n  delete(k: K) {\n    return this.#delete(k, 'delete')\n  }\n\n  #delete(k: K, reason: LRUCache.DisposeReason) {\n    let deleted = false\n    if (this.#size !== 0) {\n      const index = this.#keyMap.get(k)\n      if (index !== undefined) {\n        deleted = true\n        if (this.#size === 1) {\n          this.#clear(reason)\n        } else {\n          this.#removeItemSize(index)\n          const v = this.#valList[index]\n          if (this.#isBackgroundFetch(v)) {\n            v.__abortController.abort(new Error('deleted'))\n          } else if (this.#hasDispose || this.#hasDisposeAfter) {\n            if (this.#hasDispose) {\n              this.#dispose?.(v as V, k, reason)\n            }\n            if (this.#hasDisposeAfter) {\n              this.#disposed?.push([v as V, k, reason])\n            }\n          }\n          this.#keyMap.delete(k)\n          this.#keyList[index] = undefined\n          this.#valList[index] = undefined\n          if (index === this.#tail) {\n            this.#tail = this.#prev[index] as Index\n          } else if (index === this.#head) {\n            this.#head = this.#next[index] as Index\n          } else {\n            const pi = this.#prev[index] as number\n            this.#next[pi] = this.#next[index] as number\n            const ni = this.#next[index] as number\n            this.#prev[ni] = this.#prev[index] as number\n          }\n          this.#size--\n          this.#free.push(index)\n        }\n      }\n    }\n    if (this.#hasDisposeAfter && this.#disposed?.length) {\n      const dt = this.#disposed\n      let task: DisposeTask<K, V> | undefined\n      while ((task = dt?.shift())) {\n        this.#disposeAfter?.(...task)\n      }\n    }\n    return deleted\n  }\n\n  /**\n   * Clear the cache entirely, throwing away all values.\n   */\n  clear() {\n    return this.#clear('delete')\n  }\n  #clear(reason: LRUCache.DisposeReason) {\n    for (const index of this.#rindexes({ allowStale: true })) {\n      const v = this.#valList[index]\n      if (this.#isBackgroundFetch(v)) {\n        v.__abortController.abort(new Error('deleted'))\n      } else {\n        const k = this.#keyList[index]\n        if (this.#hasDispose) {\n          this.#dispose?.(v as V, k as K, reason)\n        }\n        if (this.#hasDisposeAfter) {\n          this.#disposed?.push([v as V, k as K, reason])\n        }\n      }\n    }\n\n    this.#keyMap.clear()\n    this.#valList.fill(undefined)\n    this.#keyList.fill(undefined)\n    if (this.#ttls && this.#starts) {\n      this.#ttls.fill(0)\n      this.#starts.fill(0)\n    }\n    if (this.#sizes) {\n      this.#sizes.fill(0)\n    }\n    this.#head = 0 as Index\n    this.#tail = 0 as Index\n    this.#free.length = 0\n    this.#calculatedSize = 0\n    this.#size = 0\n    if (this.#hasDisposeAfter && this.#disposed) {\n      const dt = this.#disposed\n      let task: DisposeTask<K, V> | undefined\n      while ((task = dt?.shift())) {\n        this.#disposeAfter?.(...task)\n      }\n    }\n  }\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.min.js b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.min.js
new file mode 100644
index 0000000..ad643b0
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.min.js
@@ -0,0 +1,2 @@
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m={allowStale:i,updateAgeOnGet:s,noDeleteOnStaleGet:n,ttl:h,noDisposeOnSet:o,size:r,sizeCalculation:g,noUpdateTTL:b,noDeleteOnFetchRejection:f,allowStaleOnFetchRejection:u,allowStaleOnFetchAbort:F,ignoreFetchAbort:c,status:a,signal:w},p=this.#s.get(t);if(p===void 0){a&&(a.fetch="miss");let _=this.#x(t,p,m,d);return _.__returned=_}else{let _=this.#t[p];if(this.#e(_)){let M=i&&_.__staleWhileFetching!==void 0;return a&&(a.fetch="inflight",M&&(a.returnedStale=!0)),M?_.__staleWhileFetching:_.__returned=_}let z=this.#d(p);if(!S&&!z)return a&&(a.fetch="hit"),this.#C(p),s&&this.#v(p),a&&this.#O(a,p),_;let y=this.#x(t,p,m,d),L=y.__staleWhileFetching!==void 0&&i;return a&&(a.fetch=z?"stale":"refresh",L&&z&&(a.returnedStale=!0)),L?y.__staleWhileFetching:y.__returned=y}}async forceFetch(t,e={}){let i=await this.fetch(t,e);if(i===void 0)throw new Error("fetch() returned undefined");return i}memo(t,e={}){let i=this.#W;if(!i)throw new Error("no memoMethod provided to constructor");let{context:s,forceRefresh:n,...h}=e,o=this.get(t,h);if(!n&&o!==void 0)return o;let r=i(t,o,{options:h,context:s});return this.set(t,r,h),r}get(t,e={}){let{allowStale:i=this.allowStale,updateAgeOnGet:s=this.updateAgeOnGet,noDeleteOnStaleGet:n=this.noDeleteOnStaleGet,status:h}=e,o=this.#s.get(t);if(o!==void 0){let r=this.#t[o],g=this.#e(r);return h&&this.#O(h,o),this.#d(o)?(h&&(h.get="stale"),g?(h&&i&&r.__staleWhileFetching!==void 0&&(h.returnedStale=!0),i?r.__staleWhileFetching:void 0):(n||this.#T(t,"expire"),h&&i&&(h.returnedStale=!0),i?r:void 0)):(h&&(h.get="hit"),g?r.__staleWhileFetching:(this.#C(o),s&&this.#v(o),r))}else h&&(h.get="miss")}#I(t,e){this.#c[e]=t,this.#l[t]=e}#C(t){t!==this.#h&&(t===this.#o?this.#o=this.#l[t]:this.#I(this.#c[t],this.#l[t]),this.#I(this.#h,t),this.#h=t)}delete(t){return this.#T(t,"delete")}#T(t,e){let i=!1;if(this.#n!==0){let s=this.#s.get(t);if(s!==void 0)if(i=!0,this.#n===1)this.#N(e);else{this.#z(s);let n=this.#t[s];if(this.#e(n)?n.__abortController.abort(new Error("deleted")):(this.#y||this.#a)&&(this.#y&&this.#p?.(n,t,e),this.#a&&this.#r?.push([n,t,e])),this.#s.delete(t),this.#i[s]=void 0,this.#t[s]=void 0,s===this.#h)this.#h=this.#c[s];else if(s===this.#o)this.#o=this.#l[s];else{let h=this.#c[s];this.#l[h]=this.#l[s];let o=this.#l[s];this.#c[o]=this.#c[s]}this.#n--,this.#_.push(s)}}if(this.#a&&this.#r?.length){let s=this.#r,n;for(;n=s?.shift();)this.#w?.(...n)}return i}clear(){return this.#N("delete")}#N(t){for(let e of this.#F({allowStale:!0})){let i=this.#t[e];if(this.#e(i))i.__abortController.abort(new Error("deleted"));else{let s=this.#i[e];this.#y&&this.#p?.(i,s,t),this.#a&&this.#r?.push([i,s,t])}}if(this.#s.clear(),this.#t.fill(void 0),this.#i.fill(void 0),this.#u&&this.#m&&(this.#u.fill(0),this.#m.fill(0)),this.#b&&this.#b.fill(0),this.#o=0,this.#h=0,this.#_.length=0,this.#S=0,this.#n=0,this.#a&&this.#r){let e=this.#r,i;for(;i=e?.shift();)this.#w?.(...i)}}};exports.LRUCache=C;
+//# sourceMappingURL=index.min.js.map
diff --git a/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.min.js.map b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.min.js.map
new file mode 100644
index 0000000..11b43a0
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/commonjs/index.min.js.map
@@ -0,0 +1,7 @@
+{
+  "version": 3,
+  "sources": ["../../src/index.ts"],
+  "sourcesContent": ["/**\n * @module LRUCache\n */\n\n// module-private names and types\ntype Perf = { now: () => number }\nconst perf: Perf =\n  typeof performance === 'object' &&\n  performance &&\n  typeof performance.now === 'function'\n    ? performance\n    : Date\n\nconst warned = new Set<string>()\n\n// either a function or a class\ntype ForC = ((...a: any[]) => any) | { new (...a: any[]): any }\n\n/* c8 ignore start */\nconst PROCESS = (\n  typeof process === 'object' && !!process ? process : {}\n) as { [k: string]: any }\n/* c8 ignore start */\n\nconst emitWarning = (\n  msg: string,\n  type: string,\n  code: string,\n  fn: ForC\n) => {\n  typeof PROCESS.emitWarning === 'function'\n    ? PROCESS.emitWarning(msg, type, code, fn)\n    : console.error(`[${code}] ${type}: ${msg}`)\n}\n\nlet AC = globalThis.AbortController\nlet AS = globalThis.AbortSignal\n\n/* c8 ignore start */\nif (typeof AC === 'undefined') {\n  //@ts-ignore\n  AS = class AbortSignal {\n    onabort?: (...a: any[]) => any\n    _onabort: ((...a: any[]) => any)[] = []\n    reason?: any\n    aborted: boolean = false\n    addEventListener(_: string, fn: (...a: any[]) => any) {\n      this._onabort.push(fn)\n    }\n  }\n  //@ts-ignore\n  AC = class AbortController {\n    constructor() {\n      warnACPolyfill()\n    }\n    signal = new AS()\n    abort(reason: any) {\n      if (this.signal.aborted) return\n      //@ts-ignore\n      this.signal.reason = reason\n      //@ts-ignore\n      this.signal.aborted = true\n      //@ts-ignore\n      for (const fn of this.signal._onabort) {\n        fn(reason)\n      }\n      this.signal.onabort?.(reason)\n    }\n  }\n  let printACPolyfillWarning =\n    PROCESS.env?.LRU_CACHE_IGNORE_AC_WARNING !== '1'\n  const warnACPolyfill = () => {\n    if (!printACPolyfillWarning) return\n    printACPolyfillWarning = false\n    emitWarning(\n      'AbortController is not defined. If using lru-cache in ' +\n        'node 14, load an AbortController polyfill from the ' +\n        '`node-abort-controller` package. A minimal polyfill is ' +\n        'provided for use by LRUCache.fetch(), but it should not be ' +\n        'relied upon in other contexts (eg, passing it to other APIs that ' +\n        'use AbortController/AbortSignal might have undesirable effects). ' +\n        'You may disable this with LRU_CACHE_IGNORE_AC_WARNING=1 in the env.',\n      'NO_ABORT_CONTROLLER',\n      'ENOTSUP',\n      warnACPolyfill\n    )\n  }\n}\n/* c8 ignore stop */\n\nconst shouldWarn = (code: string) => !warned.has(code)\n\nconst TYPE = Symbol('type')\nexport type PosInt = number & { [TYPE]: 'Positive Integer' }\nexport type Index = number & { [TYPE]: 'LRUCache Index' }\n\nconst isPosInt = (n: any): n is PosInt =>\n  n && n === Math.floor(n) && n > 0 && isFinite(n)\n\nexport type UintArray = Uint8Array | Uint16Array | Uint32Array\nexport type NumberArray = UintArray | number[]\n\n/* c8 ignore start */\n// This is a little bit ridiculous, tbh.\n// The maximum array length is 2^32-1 or thereabouts on most JS impls.\n// And well before that point, you're caching the entire world, I mean,\n// that's ~32GB of just integers for the next/prev links, plus whatever\n// else to hold that many keys and values.  Just filling the memory with\n// zeroes at init time is brutal when you get that big.\n// But why not be complete?\n// Maybe in the future, these limits will have expanded.\nconst getUintArray = (max: number) =>\n  !isPosInt(max)\n    ? null\n    : max <= Math.pow(2, 8)\n    ? Uint8Array\n    : max <= Math.pow(2, 16)\n    ? Uint16Array\n    : max <= Math.pow(2, 32)\n    ? Uint32Array\n    : max <= Number.MAX_SAFE_INTEGER\n    ? ZeroArray\n    : null\n/* c8 ignore stop */\n\nclass ZeroArray extends Array<number> {\n  constructor(size: number) {\n    super(size)\n    this.fill(0)\n  }\n}\nexport type { ZeroArray }\nexport type { Stack }\n\nexport type StackLike = Stack | Index[]\nclass Stack {\n  heap: NumberArray\n  length: number\n  // private constructor\n  static #constructing: boolean = false\n  static create(max: number): StackLike {\n    const HeapCls = getUintArray(max)\n    if (!HeapCls) return []\n    Stack.#constructing = true\n    const s = new Stack(max, HeapCls)\n    Stack.#constructing = false\n    return s\n  }\n  constructor(\n    max: number,\n    HeapCls: { new (n: number): NumberArray }\n  ) {\n    /* c8 ignore start */\n    if (!Stack.#constructing) {\n      throw new TypeError('instantiate Stack using Stack.create(n)')\n    }\n    /* c8 ignore stop */\n    this.heap = new HeapCls(max)\n    this.length = 0\n  }\n  push(n: Index) {\n    this.heap[this.length++] = n\n  }\n  pop(): Index {\n    return this.heap[--this.length] as Index\n  }\n}\n\n/**\n * Promise representing an in-progress {@link LRUCache#fetch} call\n */\nexport type BackgroundFetch<V> = Promise<V | undefined> & {\n  __returned: BackgroundFetch<V> | undefined\n  __abortController: AbortController\n  __staleWhileFetching: V | undefined\n}\n\nexport type DisposeTask<K, V> = [\n  value: V,\n  key: K,\n  reason: LRUCache.DisposeReason\n]\n\nexport namespace LRUCache {\n  /**\n   * An integer greater than 0, reflecting the calculated size of items\n   */\n  export type Size = number\n\n  /**\n   * Integer greater than 0, representing some number of milliseconds, or the\n   * time at which a TTL started counting from.\n   */\n  export type Milliseconds = number\n\n  /**\n   * An integer greater than 0, reflecting a number of items\n   */\n  export type Count = number\n\n  /**\n   * The reason why an item was removed from the cache, passed\n   * to the {@link Disposer} methods.\n   *\n   * - `evict`: The item was evicted because it is the least recently used,\n   *   and the cache is full.\n   * - `set`: A new value was set, overwriting the old value being disposed.\n   * - `delete`: The item was explicitly deleted, either by calling\n   *   {@link LRUCache#delete}, {@link LRUCache#clear}, or\n   *   {@link LRUCache#set} with an undefined value.\n   * - `expire`: The item was removed due to exceeding its TTL.\n   * - `fetch`: A {@link OptionsBase#fetchMethod} operation returned\n   *   `undefined` or was aborted, causing the item to be deleted.\n   */\n  export type DisposeReason =\n    | 'evict'\n    | 'set'\n    | 'delete'\n    | 'expire'\n    | 'fetch'\n  /**\n   * A method called upon item removal, passed as the\n   * {@link OptionsBase.dispose} and/or\n   * {@link OptionsBase.disposeAfter} options.\n   */\n  export type Disposer<K, V> = (\n    value: V,\n    key: K,\n    reason: DisposeReason\n  ) => void\n\n  /**\n   * A function that returns the effective calculated size\n   * of an entry in the cache.\n   */\n  export type SizeCalculator<K, V> = (value: V, key: K) => Size\n\n  /**\n   * Options provided to the\n   * {@link OptionsBase.fetchMethod} function.\n   */\n  export interface FetcherOptions<K, V, FC = unknown> {\n    signal: AbortSignal\n    options: FetcherFetchOptions<K, V, FC>\n    /**\n     * Object provided in the {@link FetchOptions.context} option to\n     * {@link LRUCache#fetch}\n     */\n    context: FC\n  }\n\n  /**\n   * Occasionally, it may be useful to track the internal behavior of the\n   * cache, particularly for logging, debugging, or for behavior within the\n   * `fetchMethod`. To do this, you can pass a `status` object to the\n   * {@link LRUCache#fetch}, {@link LRUCache#get}, {@link LRUCache#set},\n   * {@link LRUCache#memo}, and {@link LRUCache#has} methods.\n   *\n   * The `status` option should be a plain JavaScript object. The following\n   * fields will be set on it appropriately, depending on the situation.\n   */\n  export interface Status<V> {\n    /**\n     * The status of a set() operation.\n     *\n     * - add: the item was not found in the cache, and was added\n     * - update: the item was in the cache, with the same value provided\n     * - replace: the item was in the cache, and replaced\n     * - miss: the item was not added to the cache for some reason\n     */\n    set?: 'add' | 'update' | 'replace' | 'miss'\n\n    /**\n     * the ttl stored for the item, or undefined if ttls are not used.\n     */\n    ttl?: Milliseconds\n\n    /**\n     * the start time for the item, or undefined if ttls are not used.\n     */\n    start?: Milliseconds\n\n    /**\n     * The timestamp used for TTL calculation\n     */\n    now?: Milliseconds\n\n    /**\n     * the remaining ttl for the item, or undefined if ttls are not used.\n     */\n    remainingTTL?: Milliseconds\n\n    /**\n     * The calculated size for the item, if sizes are used.\n     */\n    entrySize?: Size\n\n    /**\n     * The total calculated size of the cache, if sizes are used.\n     */\n    totalCalculatedSize?: Size\n\n    /**\n     * A flag indicating that the item was not stored, due to exceeding the\n     * {@link OptionsBase.maxEntrySize}\n     */\n    maxEntrySizeExceeded?: true\n\n    /**\n     * The old value, specified in the case of `set:'update'` or\n     * `set:'replace'`\n     */\n    oldValue?: V\n\n    /**\n     * The results of a {@link LRUCache#has} operation\n     *\n     * - hit: the item was found in the cache\n     * - stale: the item was found in the cache, but is stale\n     * - miss: the item was not found in the cache\n     */\n    has?: 'hit' | 'stale' | 'miss'\n\n    /**\n     * The status of a {@link LRUCache#fetch} operation.\n     * Note that this can change as the underlying fetch() moves through\n     * various states.\n     *\n     * - inflight: there is another fetch() for this key which is in process\n     * - get: there is no {@link OptionsBase.fetchMethod}, so\n     *   {@link LRUCache#get} was called.\n     * - miss: the item is not in cache, and will be fetched.\n     * - hit: the item is in the cache, and was resolved immediately.\n     * - stale: the item is in the cache, but stale.\n     * - refresh: the item is in the cache, and not stale, but\n     *   {@link FetchOptions.forceRefresh} was specified.\n     */\n    fetch?: 'get' | 'inflight' | 'miss' | 'hit' | 'stale' | 'refresh'\n\n    /**\n     * The {@link OptionsBase.fetchMethod} was called\n     */\n    fetchDispatched?: true\n\n    /**\n     * The cached value was updated after a successful call to\n     * {@link OptionsBase.fetchMethod}\n     */\n    fetchUpdated?: true\n\n    /**\n     * The reason for a fetch() rejection.  Either the error raised by the\n     * {@link OptionsBase.fetchMethod}, or the reason for an\n     * AbortSignal.\n     */\n    fetchError?: Error\n\n    /**\n     * The fetch received an abort signal\n     */\n    fetchAborted?: true\n\n    /**\n     * The abort signal received was ignored, and the fetch was allowed to\n     * continue.\n     */\n    fetchAbortIgnored?: true\n\n    /**\n     * The fetchMethod promise resolved successfully\n     */\n    fetchResolved?: true\n\n    /**\n     * The fetchMethod promise was rejected\n     */\n    fetchRejected?: true\n\n    /**\n     * The status of a {@link LRUCache#get} operation.\n     *\n     * - fetching: The item is currently being fetched.  If a previous value\n     *   is present and allowed, that will be returned.\n     * - stale: The item is in the cache, and is stale.\n     * - hit: the item is in the cache\n     * - miss: the item is not in the cache\n     */\n    get?: 'stale' | 'hit' | 'miss'\n\n    /**\n     * A fetch or get operation returned a stale value.\n     */\n    returnedStale?: true\n  }\n\n  /**\n   * options which override the options set in the LRUCache constructor\n   * when calling {@link LRUCache#fetch}.\n   *\n   * This is the union of {@link GetOptions} and {@link SetOptions}, plus\n   * {@link OptionsBase.noDeleteOnFetchRejection},\n   * {@link OptionsBase.allowStaleOnFetchRejection},\n   * {@link FetchOptions.forceRefresh}, and\n   * {@link FetcherOptions.context}\n   *\n   * Any of these may be modified in the {@link OptionsBase.fetchMethod}\n   * function, but the {@link GetOptions} fields will of course have no\n   * effect, as the {@link LRUCache#get} call already happened by the time\n   * the fetchMethod is called.\n   */\n  export interface FetcherFetchOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n      | 'noDeleteOnFetchRejection'\n      | 'allowStaleOnFetchRejection'\n      | 'ignoreFetchAbort'\n      | 'allowStaleOnFetchAbort'\n    > {\n    status?: Status<V>\n    size?: Size\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#fetch} method.\n   */\n  export interface FetchOptions<K, V, FC>\n    extends FetcherFetchOptions<K, V, FC> {\n    /**\n     * Set to true to force a re-load of the existing data, even if it\n     * is not yet stale.\n     */\n    forceRefresh?: boolean\n    /**\n     * Context provided to the {@link OptionsBase.fetchMethod} as\n     * the {@link FetcherOptions.context} param.\n     *\n     * If the FC type is specified as unknown (the default),\n     * undefined or void, then this is optional.  Otherwise, it will\n     * be required.\n     */\n    context?: FC\n    signal?: AbortSignal\n    status?: Status<V>\n  }\n  /**\n   * Options provided to {@link LRUCache#fetch} when the FC type is something\n   * other than `unknown`, `undefined`, or `void`\n   */\n  export interface FetchOptionsWithContext<K, V, FC>\n    extends FetchOptions<K, V, FC> {\n    context: FC\n  }\n  /**\n   * Options provided to {@link LRUCache#fetch} when the FC type is\n   * `undefined` or `void`\n   */\n  export interface FetchOptionsNoContext<K, V>\n    extends FetchOptions<K, V, undefined> {\n    context?: undefined\n  }\n\n  export interface MemoOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n      | 'noDeleteOnFetchRejection'\n      | 'allowStaleOnFetchRejection'\n      | 'ignoreFetchAbort'\n      | 'allowStaleOnFetchAbort'\n    > {\n    /**\n     * Set to true to force a re-load of the existing data, even if it\n     * is not yet stale.\n     */\n    forceRefresh?: boolean\n    /**\n     * Context provided to the {@link OptionsBase.memoMethod} as\n     * the {@link MemoizerOptions.context} param.\n     *\n     * If the FC type is specified as unknown (the default),\n     * undefined or void, then this is optional.  Otherwise, it will\n     * be required.\n     */\n    context?: FC\n    status?: Status<V>\n  }\n  /**\n   * Options provided to {@link LRUCache#memo} when the FC type is something\n   * other than `unknown`, `undefined`, or `void`\n   */\n  export interface MemoOptionsWithContext<K, V, FC>\n    extends MemoOptions<K, V, FC> {\n    context: FC\n  }\n  /**\n   * Options provided to {@link LRUCache#memo} when the FC type is\n   * `undefined` or `void`\n   */\n  export interface MemoOptionsNoContext<K, V>\n    extends MemoOptions<K, V, undefined> {\n    context?: undefined\n  }\n\n  /**\n   * Options provided to the\n   * {@link OptionsBase.memoMethod} function.\n   */\n  export interface MemoizerOptions<K, V, FC = unknown> {\n    options: MemoizerMemoOptions<K, V, FC>\n    /**\n     * Object provided in the {@link MemoOptions.context} option to\n     * {@link LRUCache#memo}\n     */\n    context: FC\n  }\n\n  /**\n   * options which override the options set in the LRUCache constructor\n   * when calling {@link LRUCache#memo}.\n   *\n   * This is the union of {@link GetOptions} and {@link SetOptions}, plus\n   * {@link MemoOptions.forceRefresh}, and\n   * {@link MemoerOptions.context}\n   *\n   * Any of these may be modified in the {@link OptionsBase.memoMethod}\n   * function, but the {@link GetOptions} fields will of course have no\n   * effect, as the {@link LRUCache#get} call already happened by the time\n   * the memoMethod is called.\n   */\n  export interface MemoizerMemoOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n    > {\n    status?: Status<V>\n    size?: Size\n    start?: Milliseconds\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#has} method.\n   */\n  export interface HasOptions<K, V, FC>\n    extends Pick<OptionsBase<K, V, FC>, 'updateAgeOnHas'> {\n    status?: Status<V>\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#get} method.\n   */\n  export interface GetOptions<K, V, FC>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet'\n    > {\n    status?: Status<V>\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#peek} method.\n   */\n  export interface PeekOptions<K, V, FC>\n    extends Pick<OptionsBase<K, V, FC>, 'allowStale'> {}\n\n  /**\n   * Options that may be passed to the {@link LRUCache#set} method.\n   */\n  export interface SetOptions<K, V, FC>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL'\n    > {\n    /**\n     * If size tracking is enabled, then setting an explicit size\n     * in the {@link LRUCache#set} call will prevent calling the\n     * {@link OptionsBase.sizeCalculation} function.\n     */\n    size?: Size\n    /**\n     * If TTL tracking is enabled, then setting an explicit start\n     * time in the {@link LRUCache#set} call will override the\n     * default time from `performance.now()` or `Date.now()`.\n     *\n     * Note that it must be a valid value for whichever time-tracking\n     * method is in use.\n     */\n    start?: Milliseconds\n    status?: Status<V>\n  }\n\n  /**\n   * The type signature for the {@link OptionsBase.fetchMethod} option.\n   */\n  export type Fetcher<K, V, FC = unknown> = (\n    key: K,\n    staleValue: V | undefined,\n    options: FetcherOptions<K, V, FC>\n  ) => Promise<V | undefined | void> | V | undefined | void\n\n  /**\n   * the type signature for the {@link OptionsBase.memoMethod} option.\n   */\n  export type Memoizer<K, V, FC = unknown> = (\n    key: K,\n    staleValue: V | undefined,\n    options: MemoizerOptions<K, V, FC>\n  ) => V\n\n  /**\n   * Options which may be passed to the {@link LRUCache} constructor.\n   *\n   * Most of these may be overridden in the various options that use\n   * them.\n   *\n   * Despite all being technically optional, the constructor requires that\n   * a cache is at minimum limited by one or more of {@link OptionsBase.max},\n   * {@link OptionsBase.ttl}, or {@link OptionsBase.maxSize}.\n   *\n   * If {@link OptionsBase.ttl} is used alone, then it is strongly advised\n   * (and in fact required by the type definitions here) that the cache\n   * also set {@link OptionsBase.ttlAutopurge}, to prevent potentially\n   * unbounded storage.\n   *\n   * All options are also available on the {@link LRUCache} instance, making\n   * it safe to pass an LRUCache instance as the options argumemnt to\n   * make another empty cache of the same type.\n   *\n   * Some options are marked as read-only, because changing them after\n   * instantiation is not safe. Changing any of the other options will of\n   * course only have an effect on subsequent method calls.\n   */\n  export interface OptionsBase<K, V, FC> {\n    /**\n     * The maximum number of items to store in the cache before evicting\n     * old entries. This is read-only on the {@link LRUCache} instance,\n     * and may not be overridden.\n     *\n     * If set, then storage space will be pre-allocated at construction\n     * time, and the cache will perform significantly faster.\n     *\n     * Note that significantly fewer items may be stored, if\n     * {@link OptionsBase.maxSize} and/or {@link OptionsBase.ttl} are also\n     * set.\n     *\n     * **It is strongly recommended to set a `max` to prevent unbounded growth\n     * of the cache.**\n     */\n    max?: Count\n\n    /**\n     * Max time in milliseconds for items to live in cache before they are\n     * considered stale.  Note that stale items are NOT preemptively removed by\n     * default, and MAY live in the cache, contributing to its LRU max, long\n     * after they have expired, unless {@link OptionsBase.ttlAutopurge} is\n     * set.\n     *\n     * If set to `0` (the default value), then that means \"do not track\n     * TTL\", not \"expire immediately\".\n     *\n     * Also, as this cache is optimized for LRU/MRU operations, some of\n     * the staleness/TTL checks will reduce performance, as they will incur\n     * overhead by deleting items.\n     *\n     * This is not primarily a TTL cache, and does not make strong TTL\n     * guarantees. There is no pre-emptive pruning of expired items, but you\n     * _may_ set a TTL on the cache, and it will treat expired items as missing\n     * when they are fetched, and delete them.\n     *\n     * Optional, but must be a non-negative integer in ms if specified.\n     *\n     * This may be overridden by passing an options object to `cache.set()`.\n     *\n     * At least one of `max`, `maxSize`, or `TTL` is required. This must be a\n     * positive integer if set.\n     *\n     * Even if ttl tracking is enabled, **it is strongly recommended to set a\n     * `max` to prevent unbounded growth of the cache.**\n     *\n     * If ttl tracking is enabled, and `max` and `maxSize` are not set,\n     * and `ttlAutopurge` is not set, then a warning will be emitted\n     * cautioning about the potential for unbounded memory consumption.\n     * (The TypeScript definitions will also discourage this.)\n     */\n    ttl?: Milliseconds\n\n    /**\n     * Minimum amount of time in ms in which to check for staleness.\n     * Defaults to 1, which means that the current time is checked\n     * at most once per millisecond.\n     *\n     * Set to 0 to check the current time every time staleness is tested.\n     * (This reduces performance, and is theoretically unnecessary.)\n     *\n     * Setting this to a higher value will improve performance somewhat\n     * while using ttl tracking, albeit at the expense of keeping stale\n     * items around a bit longer than their TTLs would indicate.\n     *\n     * @default 1\n     */\n    ttlResolution?: Milliseconds\n\n    /**\n     * Preemptively remove stale items from the cache.\n     *\n     * Note that this may *significantly* degrade performance, especially if\n     * the cache is storing a large number of items. It is almost always best\n     * to just leave the stale items in the cache, and let them fall out as new\n     * items are added.\n     *\n     * Note that this means that {@link OptionsBase.allowStale} is a bit\n     * pointless, as stale items will be deleted almost as soon as they\n     * expire.\n     *\n     * Use with caution!\n     */\n    ttlAutopurge?: boolean\n\n    /**\n     * When using time-expiring entries with `ttl`, setting this to `true` will\n     * make each item's age reset to 0 whenever it is retrieved from cache with\n     * {@link LRUCache#get}, causing it to not expire. (It can still fall out\n     * of cache based on recency of use, of course.)\n     *\n     * Has no effect if {@link OptionsBase.ttl} is not set.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     */\n    updateAgeOnGet?: boolean\n\n    /**\n     * When using time-expiring entries with `ttl`, setting this to `true` will\n     * make each item's age reset to 0 whenever its presence in the cache is\n     * checked with {@link LRUCache#has}, causing it to not expire. (It can\n     * still fall out of cache based on recency of use, of course.)\n     *\n     * Has no effect if {@link OptionsBase.ttl} is not set.\n     */\n    updateAgeOnHas?: boolean\n\n    /**\n     * Allow {@link LRUCache#get} and {@link LRUCache#fetch} calls to return\n     * stale data, if available.\n     *\n     * By default, if you set `ttl`, stale items will only be deleted from the\n     * cache when you `get(key)`. That is, it's not preemptively pruning items,\n     * unless {@link OptionsBase.ttlAutopurge} is set.\n     *\n     * If you set `allowStale:true`, it'll return the stale value *as well as*\n     * deleting it. If you don't set this, then it'll return `undefined` when\n     * you try to get a stale entry.\n     *\n     * Note that when a stale entry is fetched, _even if it is returned due to\n     * `allowStale` being set_, it is removed from the cache immediately. You\n     * can suppress this behavior by setting\n     * {@link OptionsBase.noDeleteOnStaleGet}, either in the constructor, or in\n     * the options provided to {@link LRUCache#get}.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     * The `cache.has()` method will always return `false` for stale items.\n     *\n     * Only relevant if a ttl is set.\n     */\n    allowStale?: boolean\n\n    /**\n     * Function that is called on items when they are dropped from the\n     * cache, as `dispose(value, key, reason)`.\n     *\n     * This can be handy if you want to close file descriptors or do\n     * other cleanup tasks when items are no longer stored in the cache.\n     *\n     * **NOTE**: It is called _before_ the item has been fully removed\n     * from the cache, so if you want to put it right back in, you need\n     * to wait until the next tick. If you try to add it back in during\n     * the `dispose()` function call, it will break things in subtle and\n     * weird ways.\n     *\n     * Unlike several other options, this may _not_ be overridden by\n     * passing an option to `set()`, for performance reasons.\n     *\n     * The `reason` will be one of the following strings, corresponding\n     * to the reason for the item's deletion:\n     *\n     * - `evict` Item was evicted to make space for a new addition\n     * - `set` Item was overwritten by a new value\n     * - `expire` Item expired its TTL\n     * - `fetch` Item was deleted due to a failed or aborted fetch, or a\n     *   fetchMethod returning `undefined.\n     * - `delete` Item was removed by explicit `cache.delete(key)`,\n     *   `cache.clear()`, or `cache.set(key, undefined)`.\n     */\n    dispose?: Disposer<K, V>\n\n    /**\n     * The same as {@link OptionsBase.dispose}, but called *after* the entry\n     * is completely removed and the cache is once again in a clean state.\n     *\n     * It is safe to add an item right back into the cache at this point.\n     * However, note that it is *very* easy to inadvertently create infinite\n     * recursion this way.\n     */\n    disposeAfter?: Disposer<K, V>\n\n    /**\n     * Set to true to suppress calling the\n     * {@link OptionsBase.dispose} function if the entry key is\n     * still accessible within the cache.\n     *\n     * This may be overridden by passing an options object to\n     * {@link LRUCache#set}.\n     *\n     * Only relevant if `dispose` or `disposeAfter` are set.\n     */\n    noDisposeOnSet?: boolean\n\n    /**\n     * Boolean flag to tell the cache to not update the TTL when setting a new\n     * value for an existing key (ie, when updating a value rather than\n     * inserting a new value).  Note that the TTL value is _always_ set (if\n     * provided) when adding a new entry into the cache.\n     *\n     * Has no effect if a {@link OptionsBase.ttl} is not set.\n     *\n     * May be passed as an option to {@link LRUCache#set}.\n     */\n    noUpdateTTL?: boolean\n\n    /**\n     * Set to a positive integer to track the sizes of items added to the\n     * cache, and automatically evict items in order to stay below this size.\n     * Note that this may result in fewer than `max` items being stored.\n     *\n     * Attempting to add an item to the cache whose calculated size is greater\n     * that this amount will be a no-op. The item will not be cached, and no\n     * other items will be evicted.\n     *\n     * Optional, must be a positive integer if provided.\n     *\n     * Sets `maxEntrySize` to the same value, unless a different value is\n     * provided for `maxEntrySize`.\n     *\n     * At least one of `max`, `maxSize`, or `TTL` is required. This must be a\n     * positive integer if set.\n     *\n     * Even if size tracking is enabled, **it is strongly recommended to set a\n     * `max` to prevent unbounded growth of the cache.**\n     *\n     * Note also that size tracking can negatively impact performance,\n     * though for most cases, only minimally.\n     */\n    maxSize?: Size\n\n    /**\n     * The maximum allowed size for any single item in the cache.\n     *\n     * If a larger item is passed to {@link LRUCache#set} or returned by a\n     * {@link OptionsBase.fetchMethod} or {@link OptionsBase.memoMethod}, then\n     * it will not be stored in the cache.\n     *\n     * Attempting to add an item whose calculated size is greater than\n     * this amount will not cache the item or evict any old items, but\n     * WILL delete an existing value if one is already present.\n     *\n     * Optional, must be a positive integer if provided. Defaults to\n     * the value of `maxSize` if provided.\n     */\n    maxEntrySize?: Size\n\n    /**\n     * A function that returns a number indicating the item's size.\n     *\n     * Requires {@link OptionsBase.maxSize} to be set.\n     *\n     * If not provided, and {@link OptionsBase.maxSize} or\n     * {@link OptionsBase.maxEntrySize} are set, then all\n     * {@link LRUCache#set} calls **must** provide an explicit\n     * {@link SetOptions.size} or sizeCalculation param.\n     */\n    sizeCalculation?: SizeCalculator<K, V>\n\n    /**\n     * Method that provides the implementation for {@link LRUCache#fetch}\n     *\n     * ```ts\n     * fetchMethod(key, staleValue, { signal, options, context })\n     * ```\n     *\n     * If `fetchMethod` is not provided, then `cache.fetch(key)` is equivalent\n     * to `Promise.resolve(cache.get(key))`.\n     *\n     * If at any time, `signal.aborted` is set to `true`, or if the\n     * `signal.onabort` method is called, or if it emits an `'abort'` event\n     * which you can listen to with `addEventListener`, then that means that\n     * the fetch should be abandoned. This may be passed along to async\n     * functions aware of AbortController/AbortSignal behavior.\n     *\n     * The `fetchMethod` should **only** return `undefined` or a Promise\n     * resolving to `undefined` if the AbortController signaled an `abort`\n     * event. In all other cases, it should return or resolve to a value\n     * suitable for adding to the cache.\n     *\n     * The `options` object is a union of the options that may be provided to\n     * `set()` and `get()`. If they are modified, then that will result in\n     * modifying the settings to `cache.set()` when the value is resolved, and\n     * in the case of\n     * {@link OptionsBase.noDeleteOnFetchRejection} and\n     * {@link OptionsBase.allowStaleOnFetchRejection}, the handling of\n     * `fetchMethod` failures.\n     *\n     * For example, a DNS cache may update the TTL based on the value returned\n     * from a remote DNS server by changing `options.ttl` in the `fetchMethod`.\n     */\n    fetchMethod?: Fetcher<K, V, FC>\n\n    /**\n     * Method that provides the implementation for {@link LRUCache#memo}\n     */\n    memoMethod?: Memoizer<K, V, FC>\n\n    /**\n     * Set to true to suppress the deletion of stale data when a\n     * {@link OptionsBase.fetchMethod} returns a rejected promise.\n     */\n    noDeleteOnFetchRejection?: boolean\n\n    /**\n     * Do not delete stale items when they are retrieved with\n     * {@link LRUCache#get}.\n     *\n     * Note that the `get` return value will still be `undefined`\n     * unless {@link OptionsBase.allowStale} is true.\n     *\n     * When using time-expiring entries with `ttl`, by default stale\n     * items will be removed from the cache when the key is accessed\n     * with `cache.get()`.\n     *\n     * Setting this option will cause stale items to remain in the cache, until\n     * they are explicitly deleted with `cache.delete(key)`, or retrieved with\n     * `noDeleteOnStaleGet` set to `false`.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     *\n     * Only relevant if a ttl is used.\n     */\n    noDeleteOnStaleGet?: boolean\n\n    /**\n     * Set to true to allow returning stale data when a\n     * {@link OptionsBase.fetchMethod} throws an error or returns a rejected\n     * promise.\n     *\n     * This differs from using {@link OptionsBase.allowStale} in that stale\n     * data will ONLY be returned in the case that the {@link LRUCache#fetch}\n     * fails, not any other times.\n     *\n     * If a `fetchMethod` fails, and there is no stale value available, the\n     * `fetch()` will resolve to `undefined`. Ie, all `fetchMethod` errors are\n     * suppressed.\n     *\n     * Implies `noDeleteOnFetchRejection`.\n     *\n     * This may be set in calls to `fetch()`, or defaulted on the constructor,\n     * or overridden by modifying the options object in the `fetchMethod`.\n     */\n    allowStaleOnFetchRejection?: boolean\n\n    /**\n     * Set to true to return a stale value from the cache when the\n     * `AbortSignal` passed to the {@link OptionsBase.fetchMethod} dispatches\n     * an `'abort'` event, whether user-triggered, or due to internal cache\n     * behavior.\n     *\n     * Unless {@link OptionsBase.ignoreFetchAbort} is also set, the underlying\n     * {@link OptionsBase.fetchMethod} will still be considered canceled, and\n     * any value it returns will be ignored and not cached.\n     *\n     * Caveat: since fetches are aborted when a new value is explicitly\n     * set in the cache, this can lead to fetch returning a stale value,\n     * since that was the fallback value _at the moment the `fetch()` was\n     * initiated_, even though the new updated value is now present in\n     * the cache.\n     *\n     * For example:\n     *\n     * ```ts\n     * const cache = new LRUCache<string, any>({\n     *   ttl: 100,\n     *   fetchMethod: async (url, oldValue, { signal }) =>  {\n     *     const res = await fetch(url, { signal })\n     *     return await res.json()\n     *   }\n     * })\n     * cache.set('https://example.com/', { some: 'data' })\n     * // 100ms go by...\n     * const result = cache.fetch('https://example.com/')\n     * cache.set('https://example.com/', { other: 'thing' })\n     * console.log(await result) // { some: 'data' }\n     * console.log(cache.get('https://example.com/')) // { other: 'thing' }\n     * ```\n     */\n    allowStaleOnFetchAbort?: boolean\n\n    /**\n     * Set to true to ignore the `abort` event emitted by the `AbortSignal`\n     * object passed to {@link OptionsBase.fetchMethod}, and still cache the\n     * resulting resolution value, as long as it is not `undefined`.\n     *\n     * When used on its own, this means aborted {@link LRUCache#fetch} calls\n     * are not immediately resolved or rejected when they are aborted, and\n     * instead take the full time to await.\n     *\n     * When used with {@link OptionsBase.allowStaleOnFetchAbort}, aborted\n     * {@link LRUCache#fetch} calls will resolve immediately to their stale\n     * cached value or `undefined`, and will continue to process and eventually\n     * update the cache when they resolve, as long as the resulting value is\n     * not `undefined`, thus supporting a \"return stale on timeout while\n     * refreshing\" mechanism by passing `AbortSignal.timeout(n)` as the signal.\n     *\n     * For example:\n     *\n     * ```ts\n     * const c = new LRUCache({\n     *   ttl: 100,\n     *   ignoreFetchAbort: true,\n     *   allowStaleOnFetchAbort: true,\n     *   fetchMethod: async (key, oldValue, { signal }) => {\n     *     // note: do NOT pass the signal to fetch()!\n     *     // let's say this fetch can take a long time.\n     *     const res = await fetch(`https://slow-backend-server/${key}`)\n     *     return await res.json()\n     *   },\n     * })\n     *\n     * // this will return the stale value after 100ms, while still\n     * // updating in the background for next time.\n     * const val = await c.fetch('key', { signal: AbortSignal.timeout(100) })\n     * ```\n     *\n     * **Note**: regardless of this setting, an `abort` event _is still\n     * emitted on the `AbortSignal` object_, so may result in invalid results\n     * when passed to other underlying APIs that use AbortSignals.\n     *\n     * This may be overridden in the {@link OptionsBase.fetchMethod} or the\n     * call to {@link LRUCache#fetch}.\n     */\n    ignoreFetchAbort?: boolean\n  }\n\n  export interface OptionsMaxLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    max: Count\n  }\n  export interface OptionsTTLLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    ttl: Milliseconds\n    ttlAutopurge: boolean\n  }\n  export interface OptionsSizeLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    maxSize: Size\n  }\n\n  /**\n   * The valid safe options for the {@link LRUCache} constructor\n   */\n  export type Options<K, V, FC> =\n    | OptionsMaxLimit<K, V, FC>\n    | OptionsSizeLimit<K, V, FC>\n    | OptionsTTLLimit<K, V, FC>\n\n  /**\n   * Entry objects used by {@link LRUCache#load} and {@link LRUCache#dump},\n   * and returned by {@link LRUCache#info}.\n   */\n  export interface Entry<V> {\n    value: V\n    ttl?: Milliseconds\n    size?: Size\n    start?: Milliseconds\n  }\n}\n\n/**\n * Default export, the thing you're using this module to get.\n *\n * The `K` and `V` types define the key and value types, respectively. The\n * optional `FC` type defines the type of the `context` object passed to\n * `cache.fetch()` and `cache.memo()`.\n *\n * Keys and values **must not** be `null` or `undefined`.\n *\n * All properties from the options object (with the exception of `max`,\n * `maxSize`, `fetchMethod`, `memoMethod`, `dispose` and `disposeAfter`) are\n * added as normal public members. (The listed options are read-only getters.)\n *\n * Changing any of these will alter the defaults for subsequent method calls.\n */\nexport class LRUCache<K extends {}, V extends {}, FC = unknown>\n  implements Map<K, V>\n{\n  // options that cannot be changed without disaster\n  readonly #max: LRUCache.Count\n  readonly #maxSize: LRUCache.Size\n  readonly #dispose?: LRUCache.Disposer<K, V>\n  readonly #disposeAfter?: LRUCache.Disposer<K, V>\n  readonly #fetchMethod?: LRUCache.Fetcher<K, V, FC>\n  readonly #memoMethod?: LRUCache.Memoizer<K, V, FC>\n\n  /**\n   * {@link LRUCache.OptionsBase.ttl}\n   */\n  ttl: LRUCache.Milliseconds\n\n  /**\n   * {@link LRUCache.OptionsBase.ttlResolution}\n   */\n  ttlResolution: LRUCache.Milliseconds\n  /**\n   * {@link LRUCache.OptionsBase.ttlAutopurge}\n   */\n  ttlAutopurge: boolean\n  /**\n   * {@link LRUCache.OptionsBase.updateAgeOnGet}\n   */\n  updateAgeOnGet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.updateAgeOnHas}\n   */\n  updateAgeOnHas: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStale}\n   */\n  allowStale: boolean\n\n  /**\n   * {@link LRUCache.OptionsBase.noDisposeOnSet}\n   */\n  noDisposeOnSet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.noUpdateTTL}\n   */\n  noUpdateTTL: boolean\n  /**\n   * {@link LRUCache.OptionsBase.maxEntrySize}\n   */\n  maxEntrySize: LRUCache.Size\n  /**\n   * {@link LRUCache.OptionsBase.sizeCalculation}\n   */\n  sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  /**\n   * {@link LRUCache.OptionsBase.noDeleteOnFetchRejection}\n   */\n  noDeleteOnFetchRejection: boolean\n  /**\n   * {@link LRUCache.OptionsBase.noDeleteOnStaleGet}\n   */\n  noDeleteOnStaleGet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort}\n   */\n  allowStaleOnFetchAbort: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchRejection}\n   */\n  allowStaleOnFetchRejection: boolean\n  /**\n   * {@link LRUCache.OptionsBase.ignoreFetchAbort}\n   */\n  ignoreFetchAbort: boolean\n\n  // computed properties\n  #size: LRUCache.Count\n  #calculatedSize: LRUCache.Size\n  #keyMap: Map<K, Index>\n  #keyList: (K | undefined)[]\n  #valList: (V | BackgroundFetch<V> | undefined)[]\n  #next: NumberArray\n  #prev: NumberArray\n  #head: Index\n  #tail: Index\n  #free: StackLike\n  #disposed?: DisposeTask<K, V>[]\n  #sizes?: ZeroArray\n  #starts?: ZeroArray\n  #ttls?: ZeroArray\n\n  #hasDispose: boolean\n  #hasFetchMethod: boolean\n  #hasDisposeAfter: boolean\n\n  /**\n   * Do not call this method unless you need to inspect the\n   * inner workings of the cache.  If anything returned by this\n   * object is modified in any way, strange breakage may occur.\n   *\n   * These fields are private for a reason!\n   *\n   * @internal\n   */\n  static unsafeExposeInternals<\n    K extends {},\n    V extends {},\n    FC extends unknown = unknown\n  >(c: LRUCache<K, V, FC>) {\n    return {\n      // properties\n      starts: c.#starts,\n      ttls: c.#ttls,\n      sizes: c.#sizes,\n      keyMap: c.#keyMap as Map<K, number>,\n      keyList: c.#keyList,\n      valList: c.#valList,\n      next: c.#next,\n      prev: c.#prev,\n      get head() {\n        return c.#head\n      },\n      get tail() {\n        return c.#tail\n      },\n      free: c.#free,\n      // methods\n      isBackgroundFetch: (p: any) => c.#isBackgroundFetch(p),\n      backgroundFetch: (\n        k: K,\n        index: number | undefined,\n        options: LRUCache.FetchOptions<K, V, FC>,\n        context: any\n      ): BackgroundFetch<V> =>\n        c.#backgroundFetch(\n          k,\n          index as Index | undefined,\n          options,\n          context\n        ),\n      moveToTail: (index: number): void =>\n        c.#moveToTail(index as Index),\n      indexes: (options?: { allowStale: boolean }) =>\n        c.#indexes(options),\n      rindexes: (options?: { allowStale: boolean }) =>\n        c.#rindexes(options),\n      isStale: (index: number | undefined) =>\n        c.#isStale(index as Index),\n    }\n  }\n\n  // Protected read-only members\n\n  /**\n   * {@link LRUCache.OptionsBase.max} (read-only)\n   */\n  get max(): LRUCache.Count {\n    return this.#max\n  }\n  /**\n   * {@link LRUCache.OptionsBase.maxSize} (read-only)\n   */\n  get maxSize(): LRUCache.Count {\n    return this.#maxSize\n  }\n  /**\n   * The total computed size of items in the cache (read-only)\n   */\n  get calculatedSize(): LRUCache.Size {\n    return this.#calculatedSize\n  }\n  /**\n   * The number of items stored in the cache (read-only)\n   */\n  get size(): LRUCache.Count {\n    return this.#size\n  }\n  /**\n   * {@link LRUCache.OptionsBase.fetchMethod} (read-only)\n   */\n  get fetchMethod(): LRUCache.Fetcher<K, V, FC> | undefined {\n    return this.#fetchMethod\n  }\n  get memoMethod(): LRUCache.Memoizer<K, V, FC> | undefined {\n    return this.#memoMethod\n  }\n  /**\n   * {@link LRUCache.OptionsBase.dispose} (read-only)\n   */\n  get dispose() {\n    return this.#dispose\n  }\n  /**\n   * {@link LRUCache.OptionsBase.disposeAfter} (read-only)\n   */\n  get disposeAfter() {\n    return this.#disposeAfter\n  }\n\n  constructor(\n    options: LRUCache.Options<K, V, FC> | LRUCache<K, V, FC>\n  ) {\n    const {\n      max = 0,\n      ttl,\n      ttlResolution = 1,\n      ttlAutopurge,\n      updateAgeOnGet,\n      updateAgeOnHas,\n      allowStale,\n      dispose,\n      disposeAfter,\n      noDisposeOnSet,\n      noUpdateTTL,\n      maxSize = 0,\n      maxEntrySize = 0,\n      sizeCalculation,\n      fetchMethod,\n      memoMethod,\n      noDeleteOnFetchRejection,\n      noDeleteOnStaleGet,\n      allowStaleOnFetchRejection,\n      allowStaleOnFetchAbort,\n      ignoreFetchAbort,\n    } = options\n\n    if (max !== 0 && !isPosInt(max)) {\n      throw new TypeError('max option must be a nonnegative integer')\n    }\n\n    const UintArray = max ? getUintArray(max) : Array\n    if (!UintArray) {\n      throw new Error('invalid max value: ' + max)\n    }\n\n    this.#max = max\n    this.#maxSize = maxSize\n    this.maxEntrySize = maxEntrySize || this.#maxSize\n    this.sizeCalculation = sizeCalculation\n    if (this.sizeCalculation) {\n      if (!this.#maxSize && !this.maxEntrySize) {\n        throw new TypeError(\n          'cannot set sizeCalculation without setting maxSize or maxEntrySize'\n        )\n      }\n      if (typeof this.sizeCalculation !== 'function') {\n        throw new TypeError('sizeCalculation set to non-function')\n      }\n    }\n\n    if (\n      memoMethod !== undefined &&\n      typeof memoMethod !== 'function'\n    ) {\n      throw new TypeError('memoMethod must be a function if defined')\n    }\n    this.#memoMethod = memoMethod\n\n    if (\n      fetchMethod !== undefined &&\n      typeof fetchMethod !== 'function'\n    ) {\n      throw new TypeError(\n        'fetchMethod must be a function if specified'\n      )\n    }\n    this.#fetchMethod = fetchMethod\n    this.#hasFetchMethod = !!fetchMethod\n\n    this.#keyMap = new Map()\n    this.#keyList = new Array(max).fill(undefined)\n    this.#valList = new Array(max).fill(undefined)\n    this.#next = new UintArray(max)\n    this.#prev = new UintArray(max)\n    this.#head = 0 as Index\n    this.#tail = 0 as Index\n    this.#free = Stack.create(max)\n    this.#size = 0\n    this.#calculatedSize = 0\n\n    if (typeof dispose === 'function') {\n      this.#dispose = dispose\n    }\n    if (typeof disposeAfter === 'function') {\n      this.#disposeAfter = disposeAfter\n      this.#disposed = []\n    } else {\n      this.#disposeAfter = undefined\n      this.#disposed = undefined\n    }\n    this.#hasDispose = !!this.#dispose\n    this.#hasDisposeAfter = !!this.#disposeAfter\n\n    this.noDisposeOnSet = !!noDisposeOnSet\n    this.noUpdateTTL = !!noUpdateTTL\n    this.noDeleteOnFetchRejection = !!noDeleteOnFetchRejection\n    this.allowStaleOnFetchRejection = !!allowStaleOnFetchRejection\n    this.allowStaleOnFetchAbort = !!allowStaleOnFetchAbort\n    this.ignoreFetchAbort = !!ignoreFetchAbort\n\n    // NB: maxEntrySize is set to maxSize if it's set\n    if (this.maxEntrySize !== 0) {\n      if (this.#maxSize !== 0) {\n        if (!isPosInt(this.#maxSize)) {\n          throw new TypeError(\n            'maxSize must be a positive integer if specified'\n          )\n        }\n      }\n      if (!isPosInt(this.maxEntrySize)) {\n        throw new TypeError(\n          'maxEntrySize must be a positive integer if specified'\n        )\n      }\n      this.#initializeSizeTracking()\n    }\n\n    this.allowStale = !!allowStale\n    this.noDeleteOnStaleGet = !!noDeleteOnStaleGet\n    this.updateAgeOnGet = !!updateAgeOnGet\n    this.updateAgeOnHas = !!updateAgeOnHas\n    this.ttlResolution =\n      isPosInt(ttlResolution) || ttlResolution === 0\n        ? ttlResolution\n        : 1\n    this.ttlAutopurge = !!ttlAutopurge\n    this.ttl = ttl || 0\n    if (this.ttl) {\n      if (!isPosInt(this.ttl)) {\n        throw new TypeError(\n          'ttl must be a positive integer if specified'\n        )\n      }\n      this.#initializeTTLTracking()\n    }\n\n    // do not allow completely unbounded caches\n    if (this.#max === 0 && this.ttl === 0 && this.#maxSize === 0) {\n      throw new TypeError(\n        'At least one of max, maxSize, or ttl is required'\n      )\n    }\n    if (!this.ttlAutopurge && !this.#max && !this.#maxSize) {\n      const code = 'LRU_CACHE_UNBOUNDED'\n      if (shouldWarn(code)) {\n        warned.add(code)\n        const msg =\n          'TTL caching without ttlAutopurge, max, or maxSize can ' +\n          'result in unbounded memory consumption.'\n        emitWarning(msg, 'UnboundedCacheWarning', code, LRUCache)\n      }\n    }\n  }\n\n  /**\n   * Return the number of ms left in the item's TTL. If item is not in cache,\n   * returns `0`. Returns `Infinity` if item is in cache without a defined TTL.\n   */\n  getRemainingTTL(key: K) {\n    return this.#keyMap.has(key) ? Infinity : 0\n  }\n\n  #initializeTTLTracking() {\n    const ttls = new ZeroArray(this.#max)\n    const starts = new ZeroArray(this.#max)\n    this.#ttls = ttls\n    this.#starts = starts\n\n    this.#setItemTTL = (index, ttl, start = perf.now()) => {\n      starts[index] = ttl !== 0 ? start : 0\n      ttls[index] = ttl\n      if (ttl !== 0 && this.ttlAutopurge) {\n        const t = setTimeout(() => {\n          if (this.#isStale(index)) {\n            this.#delete(this.#keyList[index] as K, 'expire')\n          }\n        }, ttl + 1)\n        // unref() not supported on all platforms\n        /* c8 ignore start */\n        if (t.unref) {\n          t.unref()\n        }\n        /* c8 ignore stop */\n      }\n    }\n\n    this.#updateItemAge = index => {\n      starts[index] = ttls[index] !== 0 ? perf.now() : 0\n    }\n\n    this.#statusTTL = (status, index) => {\n      if (ttls[index]) {\n        const ttl = ttls[index]\n        const start = starts[index]\n        /* c8 ignore next */\n        if (!ttl || !start) return\n        status.ttl = ttl\n        status.start = start\n        status.now = cachedNow || getNow()\n        const age = status.now - start\n        status.remainingTTL = ttl - age\n      }\n    }\n\n    // debounce calls to perf.now() to 1s so we're not hitting\n    // that costly call repeatedly.\n    let cachedNow = 0\n    const getNow = () => {\n      const n = perf.now()\n      if (this.ttlResolution > 0) {\n        cachedNow = n\n        const t = setTimeout(\n          () => (cachedNow = 0),\n          this.ttlResolution\n        )\n        // not available on all platforms\n        /* c8 ignore start */\n        if (t.unref) {\n          t.unref()\n        }\n        /* c8 ignore stop */\n      }\n      return n\n    }\n\n    this.getRemainingTTL = key => {\n      const index = this.#keyMap.get(key)\n      if (index === undefined) {\n        return 0\n      }\n      const ttl = ttls[index]\n      const start = starts[index]\n      if (!ttl || !start) {\n        return Infinity\n      }\n      const age = (cachedNow || getNow()) - start\n      return ttl - age\n    }\n\n    this.#isStale = index => {\n      const s = starts[index]\n      const t = ttls[index]\n      return !!t && !!s && (cachedNow || getNow()) - s > t\n    }\n  }\n\n  // conditionally set private methods related to TTL\n  #updateItemAge: (index: Index) => void = () => {}\n  #statusTTL: (status: LRUCache.Status<V>, index: Index) => void =\n    () => {}\n  #setItemTTL: (\n    index: Index,\n    ttl: LRUCache.Milliseconds,\n    start?: LRUCache.Milliseconds\n    // ignore because we never call this if we're not already in TTL mode\n    /* c8 ignore start */\n  ) => void = () => {}\n  /* c8 ignore stop */\n\n  #isStale: (index: Index) => boolean = () => false\n\n  #initializeSizeTracking() {\n    const sizes = new ZeroArray(this.#max)\n    this.#calculatedSize = 0\n    this.#sizes = sizes\n    this.#removeItemSize = index => {\n      this.#calculatedSize -= sizes[index] as number\n      sizes[index] = 0\n    }\n    this.#requireSize = (k, v, size, sizeCalculation) => {\n      // provisionally accept background fetches.\n      // actual value size will be checked when they return.\n      if (this.#isBackgroundFetch(v)) {\n        return 0\n      }\n      if (!isPosInt(size)) {\n        if (sizeCalculation) {\n          if (typeof sizeCalculation !== 'function') {\n            throw new TypeError('sizeCalculation must be a function')\n          }\n          size = sizeCalculation(v, k)\n          if (!isPosInt(size)) {\n            throw new TypeError(\n              'sizeCalculation return invalid (expect positive integer)'\n            )\n          }\n        } else {\n          throw new TypeError(\n            'invalid size value (must be positive integer). ' +\n              'When maxSize or maxEntrySize is used, sizeCalculation ' +\n              'or size must be set.'\n          )\n        }\n      }\n      return size\n    }\n    this.#addItemSize = (\n      index: Index,\n      size: LRUCache.Size,\n      status?: LRUCache.Status<V>\n    ) => {\n      sizes[index] = size\n      if (this.#maxSize) {\n        const maxSize = this.#maxSize - (sizes[index] as number)\n        while (this.#calculatedSize > maxSize) {\n          this.#evict(true)\n        }\n      }\n      this.#calculatedSize += sizes[index] as number\n      if (status) {\n        status.entrySize = size\n        status.totalCalculatedSize = this.#calculatedSize\n      }\n    }\n  }\n\n  #removeItemSize: (index: Index) => void = _i => {}\n  #addItemSize: (\n    index: Index,\n    size: LRUCache.Size,\n    status?: LRUCache.Status<V>\n  ) => void = (_i, _s, _st) => {}\n  #requireSize: (\n    k: K,\n    v: V | BackgroundFetch<V>,\n    size?: LRUCache.Size,\n    sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  ) => LRUCache.Size = (\n    _k: K,\n    _v: V | BackgroundFetch<V>,\n    size?: LRUCache.Size,\n    sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  ) => {\n    if (size || sizeCalculation) {\n      throw new TypeError(\n        'cannot set size without setting maxSize or maxEntrySize on cache'\n      )\n    }\n    return 0\n  };\n\n  *#indexes({ allowStale = this.allowStale } = {}) {\n    if (this.#size) {\n      for (let i = this.#tail; true; ) {\n        if (!this.#isValidIndex(i)) {\n          break\n        }\n        if (allowStale || !this.#isStale(i)) {\n          yield i\n        }\n        if (i === this.#head) {\n          break\n        } else {\n          i = this.#prev[i] as Index\n        }\n      }\n    }\n  }\n\n  *#rindexes({ allowStale = this.allowStale } = {}) {\n    if (this.#size) {\n      for (let i = this.#head; true; ) {\n        if (!this.#isValidIndex(i)) {\n          break\n        }\n        if (allowStale || !this.#isStale(i)) {\n          yield i\n        }\n        if (i === this.#tail) {\n          break\n        } else {\n          i = this.#next[i] as Index\n        }\n      }\n    }\n  }\n\n  #isValidIndex(index: Index) {\n    return (\n      index !== undefined &&\n      this.#keyMap.get(this.#keyList[index] as K) === index\n    )\n  }\n\n  /**\n   * Return a generator yielding `[key, value]` pairs,\n   * in order from most recently used to least recently used.\n   */\n  *entries() {\n    for (const i of this.#indexes()) {\n      if (\n        this.#valList[i] !== undefined &&\n        this.#keyList[i] !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield [this.#keyList[i], this.#valList[i]] as [K, V]\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.entries}\n   *\n   * Return a generator yielding `[key, value]` pairs,\n   * in order from least recently used to most recently used.\n   */\n  *rentries() {\n    for (const i of this.#rindexes()) {\n      if (\n        this.#valList[i] !== undefined &&\n        this.#keyList[i] !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield [this.#keyList[i], this.#valList[i]]\n      }\n    }\n  }\n\n  /**\n   * Return a generator yielding the keys in the cache,\n   * in order from most recently used to least recently used.\n   */\n  *keys() {\n    for (const i of this.#indexes()) {\n      const k = this.#keyList[i]\n      if (\n        k !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield k\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.keys}\n   *\n   * Return a generator yielding the keys in the cache,\n   * in order from least recently used to most recently used.\n   */\n  *rkeys() {\n    for (const i of this.#rindexes()) {\n      const k = this.#keyList[i]\n      if (\n        k !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield k\n      }\n    }\n  }\n\n  /**\n   * Return a generator yielding the values in the cache,\n   * in order from most recently used to least recently used.\n   */\n  *values() {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      if (\n        v !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield this.#valList[i] as V\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.values}\n   *\n   * Return a generator yielding the values in the cache,\n   * in order from least recently used to most recently used.\n   */\n  *rvalues() {\n    for (const i of this.#rindexes()) {\n      const v = this.#valList[i]\n      if (\n        v !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield this.#valList[i]\n      }\n    }\n  }\n\n  /**\n   * Iterating over the cache itself yields the same results as\n   * {@link LRUCache.entries}\n   */\n  [Symbol.iterator]() {\n    return this.entries()\n  }\n\n  /**\n   * A String value that is used in the creation of the default string\n   * description of an object. Called by the built-in method\n   * `Object.prototype.toString`.\n   */\n  [Symbol.toStringTag] = 'LRUCache'\n\n  /**\n   * Find a value for which the supplied fn method returns a truthy value,\n   * similar to `Array.find()`. fn is called as `fn(value, key, cache)`.\n   */\n  find(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => boolean,\n    getOptions: LRUCache.GetOptions<K, V, FC> = {}\n  ) {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      if (fn(value, this.#keyList[i] as K, this)) {\n        return this.get(this.#keyList[i] as K, getOptions)\n      }\n    }\n  }\n\n  /**\n   * Call the supplied function on each item in the cache, in order from most\n   * recently used to least recently used.\n   *\n   * `fn` is called as `fn(value, key, cache)`.\n   *\n   * If `thisp` is provided, function will be called in the `this`-context of\n   * the provided object, or the cache if no `thisp` object is provided.\n   *\n   * Does not update age or recenty of use, or iterate over stale values.\n   */\n  forEach(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any,\n    thisp: any = this\n  ) {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      fn.call(thisp, value, this.#keyList[i] as K, this)\n    }\n  }\n\n  /**\n   * The same as {@link LRUCache.forEach} but items are iterated over in\n   * reverse order.  (ie, less recently used items are iterated over first.)\n   */\n  rforEach(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any,\n    thisp: any = this\n  ) {\n    for (const i of this.#rindexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      fn.call(thisp, value, this.#keyList[i] as K, this)\n    }\n  }\n\n  /**\n   * Delete any stale entries. Returns true if anything was removed,\n   * false otherwise.\n   */\n  purgeStale() {\n    let deleted = false\n    for (const i of this.#rindexes({ allowStale: true })) {\n      if (this.#isStale(i)) {\n        this.#delete(this.#keyList[i] as K, 'expire')\n        deleted = true\n      }\n    }\n    return deleted\n  }\n\n  /**\n   * Get the extended info about a given entry, to get its value, size, and\n   * TTL info simultaneously. Returns `undefined` if the key is not present.\n   *\n   * Unlike {@link LRUCache#dump}, which is designed to be portable and survive\n   * serialization, the `start` value is always the current timestamp, and the\n   * `ttl` is a calculated remaining time to live (negative if expired).\n   *\n   * Always returns stale values, if their info is found in the cache, so be\n   * sure to check for expirations (ie, a negative {@link LRUCache.Entry#ttl})\n   * if relevant.\n   */\n  info(key: K): LRUCache.Entry<V> | undefined {\n    const i = this.#keyMap.get(key)\n    if (i === undefined) return undefined\n    const v = this.#valList[i]\n    const value: V | undefined = this.#isBackgroundFetch(v)\n      ? v.__staleWhileFetching\n      : v\n    if (value === undefined) return undefined\n    const entry: LRUCache.Entry<V> = { value }\n    if (this.#ttls && this.#starts) {\n      const ttl = this.#ttls[i]\n      const start = this.#starts[i]\n      if (ttl && start) {\n        const remain = ttl - (perf.now() - start)\n        entry.ttl = remain\n        entry.start = Date.now()\n      }\n    }\n    if (this.#sizes) {\n      entry.size = this.#sizes[i]\n    }\n    return entry\n  }\n\n  /**\n   * Return an array of [key, {@link LRUCache.Entry}] tuples which can be\n   * passed to {@link LRLUCache#load}.\n   *\n   * The `start` fields are calculated relative to a portable `Date.now()`\n   * timestamp, even if `performance.now()` is available.\n   *\n   * Stale entries are always included in the `dump`, even if\n   * {@link LRUCache.OptionsBase.allowStale} is false.\n   *\n   * Note: this returns an actual array, not a generator, so it can be more\n   * easily passed around.\n   */\n  dump() {\n    const arr: [K, LRUCache.Entry<V>][] = []\n    for (const i of this.#indexes({ allowStale: true })) {\n      const key = this.#keyList[i]\n      const v = this.#valList[i]\n      const value: V | undefined = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined || key === undefined) continue\n      const entry: LRUCache.Entry<V> = { value }\n      if (this.#ttls && this.#starts) {\n        entry.ttl = this.#ttls[i]\n        // always dump the start relative to a portable timestamp\n        // it's ok for this to be a bit slow, it's a rare operation.\n        const age = perf.now() - (this.#starts[i] as number)\n        entry.start = Math.floor(Date.now() - age)\n      }\n      if (this.#sizes) {\n        entry.size = this.#sizes[i]\n      }\n      arr.unshift([key, entry])\n    }\n    return arr\n  }\n\n  /**\n   * Reset the cache and load in the items in entries in the order listed.\n   *\n   * The shape of the resulting cache may be different if the same options are\n   * not used in both caches.\n   *\n   * The `start` fields are assumed to be calculated relative to a portable\n   * `Date.now()` timestamp, even if `performance.now()` is available.\n   */\n  load(arr: [K, LRUCache.Entry<V>][]) {\n    this.clear()\n    for (const [key, entry] of arr) {\n      if (entry.start) {\n        // entry.start is a portable timestamp, but we may be using\n        // node's performance.now(), so calculate the offset, so that\n        // we get the intended remaining TTL, no matter how long it's\n        // been on ice.\n        //\n        // it's ok for this to be a bit slow, it's a rare operation.\n        const age = Date.now() - entry.start\n        entry.start = perf.now() - age\n      }\n      this.set(key, entry.value, entry)\n    }\n  }\n\n  /**\n   * Add a value to the cache.\n   *\n   * Note: if `undefined` is specified as a value, this is an alias for\n   * {@link LRUCache#delete}\n   *\n   * Fields on the {@link LRUCache.SetOptions} options param will override\n   * their corresponding values in the constructor options for the scope\n   * of this single `set()` operation.\n   *\n   * If `start` is provided, then that will set the effective start\n   * time for the TTL calculation. Note that this must be a previous\n   * value of `performance.now()` if supported, or a previous value of\n   * `Date.now()` if not.\n   *\n   * Options object may also include `size`, which will prevent\n   * calling the `sizeCalculation` function and just use the specified\n   * number if it is a positive integer, and `noDisposeOnSet` which\n   * will prevent calling a `dispose` function in the case of\n   * overwrites.\n   *\n   * If the `size` (or return value of `sizeCalculation`) for a given\n   * entry is greater than `maxEntrySize`, then the item will not be\n   * added to the cache.\n   *\n   * Will update the recency of the entry.\n   *\n   * If the value is `undefined`, then this is an alias for\n   * `cache.delete(key)`. `undefined` is never stored in the cache.\n   */\n  set(\n    k: K,\n    v: V | BackgroundFetch<V> | undefined,\n    setOptions: LRUCache.SetOptions<K, V, FC> = {}\n  ) {\n    if (v === undefined) {\n      this.delete(k)\n      return this\n    }\n    const {\n      ttl = this.ttl,\n      start,\n      noDisposeOnSet = this.noDisposeOnSet,\n      sizeCalculation = this.sizeCalculation,\n      status,\n    } = setOptions\n    let { noUpdateTTL = this.noUpdateTTL } = setOptions\n\n    const size = this.#requireSize(\n      k,\n      v,\n      setOptions.size || 0,\n      sizeCalculation\n    )\n    // if the item doesn't fit, don't do anything\n    // NB: maxEntrySize set to maxSize by default\n    if (this.maxEntrySize && size > this.maxEntrySize) {\n      if (status) {\n        status.set = 'miss'\n        status.maxEntrySizeExceeded = true\n      }\n      // have to delete, in case something is there already.\n      this.#delete(k, 'set')\n      return this\n    }\n    let index = this.#size === 0 ? undefined : this.#keyMap.get(k)\n    if (index === undefined) {\n      // addition\n      index = (\n        this.#size === 0\n          ? this.#tail\n          : this.#free.length !== 0\n          ? this.#free.pop()\n          : this.#size === this.#max\n          ? this.#evict(false)\n          : this.#size\n      ) as Index\n      this.#keyList[index] = k\n      this.#valList[index] = v\n      this.#keyMap.set(k, index)\n      this.#next[this.#tail] = index\n      this.#prev[index] = this.#tail\n      this.#tail = index\n      this.#size++\n      this.#addItemSize(index, size, status)\n      if (status) status.set = 'add'\n      noUpdateTTL = false\n    } else {\n      // update\n      this.#moveToTail(index)\n      const oldVal = this.#valList[index] as V | BackgroundFetch<V>\n      if (v !== oldVal) {\n        if (this.#hasFetchMethod && this.#isBackgroundFetch(oldVal)) {\n          oldVal.__abortController.abort(new Error('replaced'))\n          const { __staleWhileFetching: s } = oldVal\n          if (s !== undefined && !noDisposeOnSet) {\n            if (this.#hasDispose) {\n              this.#dispose?.(s as V, k, 'set')\n            }\n            if (this.#hasDisposeAfter) {\n              this.#disposed?.push([s as V, k, 'set'])\n            }\n          }\n        } else if (!noDisposeOnSet) {\n          if (this.#hasDispose) {\n            this.#dispose?.(oldVal as V, k, 'set')\n          }\n          if (this.#hasDisposeAfter) {\n            this.#disposed?.push([oldVal as V, k, 'set'])\n          }\n        }\n        this.#removeItemSize(index)\n        this.#addItemSize(index, size, status)\n        this.#valList[index] = v\n        if (status) {\n          status.set = 'replace'\n          const oldValue =\n            oldVal && this.#isBackgroundFetch(oldVal)\n              ? oldVal.__staleWhileFetching\n              : oldVal\n          if (oldValue !== undefined) status.oldValue = oldValue\n        }\n      } else if (status) {\n        status.set = 'update'\n      }\n    }\n    if (ttl !== 0 && !this.#ttls) {\n      this.#initializeTTLTracking()\n    }\n    if (this.#ttls) {\n      if (!noUpdateTTL) {\n        this.#setItemTTL(index, ttl, start)\n      }\n      if (status) this.#statusTTL(status, index)\n    }\n    if (!noDisposeOnSet && this.#hasDisposeAfter && this.#disposed) {\n      const dt = this.#disposed\n      let task: DisposeTask<K, V> | undefined\n      while ((task = dt?.shift())) {\n        this.#disposeAfter?.(...task)\n      }\n    }\n    return this\n  }\n\n  /**\n   * Evict the least recently used item, returning its value or\n   * `undefined` if cache is empty.\n   */\n  pop(): V | undefined {\n    try {\n      while (this.#size) {\n        const val = this.#valList[this.#head]\n        this.#evict(true)\n        if (this.#isBackgroundFetch(val)) {\n          if (val.__staleWhileFetching) {\n            return val.__staleWhileFetching\n          }\n        } else if (val !== undefined) {\n          return val\n        }\n      }\n    } finally {\n      if (this.#hasDisposeAfter && this.#disposed) {\n        const dt = this.#disposed\n        let task: DisposeTask<K, V> | undefined\n        while ((task = dt?.shift())) {\n          this.#disposeAfter?.(...task)\n        }\n      }\n    }\n  }\n\n  #evict(free: boolean) {\n    const head = this.#head\n    const k = this.#keyList[head] as K\n    const v = this.#valList[head] as V\n    if (this.#hasFetchMethod && this.#isBackgroundFetch(v)) {\n      v.__abortController.abort(new Error('evicted'))\n    } else if (this.#hasDispose || this.#hasDisposeAfter) {\n      if (this.#hasDispose) {\n        this.#dispose?.(v, k, 'evict')\n      }\n      if (this.#hasDisposeAfter) {\n        this.#disposed?.push([v, k, 'evict'])\n      }\n    }\n    this.#removeItemSize(head)\n    // if we aren't about to use the index, then null these out\n    if (free) {\n      this.#keyList[head] = undefined\n      this.#valList[head] = undefined\n      this.#free.push(head)\n    }\n    if (this.#size === 1) {\n      this.#head = this.#tail = 0 as Index\n      this.#free.length = 0\n    } else {\n      this.#head = this.#next[head] as Index\n    }\n    this.#keyMap.delete(k)\n    this.#size--\n    return head\n  }\n\n  /**\n   * Check if a key is in the cache, without updating the recency of use.\n   * Will return false if the item is stale, even though it is technically\n   * in the cache.\n   *\n   * Check if a key is in the cache, without updating the recency of\n   * use. Age is updated if {@link LRUCache.OptionsBase.updateAgeOnHas} is set\n   * to `true` in either the options or the constructor.\n   *\n   * Will return `false` if the item is stale, even though it is technically in\n   * the cache. The difference can be determined (if it matters) by using a\n   * `status` argument, and inspecting the `has` field.\n   *\n   * Will not update item age unless\n   * {@link LRUCache.OptionsBase.updateAgeOnHas} is set.\n   */\n  has(k: K, hasOptions: LRUCache.HasOptions<K, V, FC> = {}) {\n    const { updateAgeOnHas = this.updateAgeOnHas, status } =\n      hasOptions\n    const index = this.#keyMap.get(k)\n    if (index !== undefined) {\n      const v = this.#valList[index]\n      if (\n        this.#isBackgroundFetch(v) &&\n        v.__staleWhileFetching === undefined\n      ) {\n        return false\n      }\n      if (!this.#isStale(index)) {\n        if (updateAgeOnHas) {\n          this.#updateItemAge(index)\n        }\n        if (status) {\n          status.has = 'hit'\n          this.#statusTTL(status, index)\n        }\n        return true\n      } else if (status) {\n        status.has = 'stale'\n        this.#statusTTL(status, index)\n      }\n    } else if (status) {\n      status.has = 'miss'\n    }\n    return false\n  }\n\n  /**\n   * Like {@link LRUCache#get} but doesn't update recency or delete stale\n   * items.\n   *\n   * Returns `undefined` if the item is stale, unless\n   * {@link LRUCache.OptionsBase.allowStale} is set.\n   */\n  peek(k: K, peekOptions: LRUCache.PeekOptions<K, V, FC> = {}) {\n    const { allowStale = this.allowStale } = peekOptions\n    const index = this.#keyMap.get(k)\n    if (\n      index === undefined ||\n      (!allowStale && this.#isStale(index))\n    ) {\n      return\n    }\n    const v = this.#valList[index]\n    // either stale and allowed, or forcing a refresh of non-stale value\n    return this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v\n  }\n\n  #backgroundFetch(\n    k: K,\n    index: Index | undefined,\n    options: LRUCache.FetchOptions<K, V, FC>,\n    context: any\n  ): BackgroundFetch<V> {\n    const v = index === undefined ? undefined : this.#valList[index]\n    if (this.#isBackgroundFetch(v)) {\n      return v\n    }\n\n    const ac = new AC()\n    const { signal } = options\n    // when/if our AC signals, then stop listening to theirs.\n    signal?.addEventListener('abort', () => ac.abort(signal.reason), {\n      signal: ac.signal,\n    })\n\n    const fetchOpts = {\n      signal: ac.signal,\n      options,\n      context,\n    }\n\n    const cb = (\n      v: V | undefined,\n      updateCache = false\n    ): V | undefined => {\n      const { aborted } = ac.signal\n      const ignoreAbort = options.ignoreFetchAbort && v !== undefined\n      if (options.status) {\n        if (aborted && !updateCache) {\n          options.status.fetchAborted = true\n          options.status.fetchError = ac.signal.reason\n          if (ignoreAbort) options.status.fetchAbortIgnored = true\n        } else {\n          options.status.fetchResolved = true\n        }\n      }\n      if (aborted && !ignoreAbort && !updateCache) {\n        return fetchFail(ac.signal.reason)\n      }\n      // either we didn't abort, and are still here, or we did, and ignored\n      const bf = p as BackgroundFetch<V>\n      if (this.#valList[index as Index] === p) {\n        if (v === undefined) {\n          if (bf.__staleWhileFetching) {\n            this.#valList[index as Index] = bf.__staleWhileFetching\n          } else {\n            this.#delete(k, 'fetch')\n          }\n        } else {\n          if (options.status) options.status.fetchUpdated = true\n          this.set(k, v, fetchOpts.options)\n        }\n      }\n      return v\n    }\n\n    const eb = (er: any) => {\n      if (options.status) {\n        options.status.fetchRejected = true\n        options.status.fetchError = er\n      }\n      return fetchFail(er)\n    }\n\n    const fetchFail = (er: any): V | undefined => {\n      const { aborted } = ac.signal\n      const allowStaleAborted =\n        aborted && options.allowStaleOnFetchAbort\n      const allowStale =\n        allowStaleAborted || options.allowStaleOnFetchRejection\n      const noDelete = allowStale || options.noDeleteOnFetchRejection\n      const bf = p as BackgroundFetch<V>\n      if (this.#valList[index as Index] === p) {\n        // if we allow stale on fetch rejections, then we need to ensure that\n        // the stale value is not removed from the cache when the fetch fails.\n        const del = !noDelete || bf.__staleWhileFetching === undefined\n        if (del) {\n          this.#delete(k, 'fetch')\n        } else if (!allowStaleAborted) {\n          // still replace the *promise* with the stale value,\n          // since we are done with the promise at this point.\n          // leave it untouched if we're still waiting for an\n          // aborted background fetch that hasn't yet returned.\n          this.#valList[index as Index] = bf.__staleWhileFetching\n        }\n      }\n      if (allowStale) {\n        if (options.status && bf.__staleWhileFetching !== undefined) {\n          options.status.returnedStale = true\n        }\n        return bf.__staleWhileFetching\n      } else if (bf.__returned === bf) {\n        throw er\n      }\n    }\n\n    const pcall = (\n      res: (v: V | undefined) => void,\n      rej: (e: any) => void\n    ) => {\n      const fmp = this.#fetchMethod?.(k, v, fetchOpts)\n      if (fmp && fmp instanceof Promise) {\n        fmp.then(v => res(v === undefined ? undefined : v), rej)\n      }\n      // ignored, we go until we finish, regardless.\n      // defer check until we are actually aborting,\n      // so fetchMethod can override.\n      ac.signal.addEventListener('abort', () => {\n        if (\n          !options.ignoreFetchAbort ||\n          options.allowStaleOnFetchAbort\n        ) {\n          res(undefined)\n          // when it eventually resolves, update the cache.\n          if (options.allowStaleOnFetchAbort) {\n            res = v => cb(v, true)\n          }\n        }\n      })\n    }\n\n    if (options.status) options.status.fetchDispatched = true\n    const p = new Promise(pcall).then(cb, eb)\n    const bf: BackgroundFetch<V> = Object.assign(p, {\n      __abortController: ac,\n      __staleWhileFetching: v,\n      __returned: undefined,\n    })\n\n    if (index === undefined) {\n      // internal, don't expose status.\n      this.set(k, bf, { ...fetchOpts.options, status: undefined })\n      index = this.#keyMap.get(k)\n    } else {\n      this.#valList[index] = bf\n    }\n    return bf\n  }\n\n  #isBackgroundFetch(p: any): p is BackgroundFetch<V> {\n    if (!this.#hasFetchMethod) return false\n    const b = p as BackgroundFetch<V>\n    return (\n      !!b &&\n      b instanceof Promise &&\n      b.hasOwnProperty('__staleWhileFetching') &&\n      b.__abortController instanceof AC\n    )\n  }\n\n  /**\n   * Make an asynchronous cached fetch using the\n   * {@link LRUCache.OptionsBase.fetchMethod} function.\n   *\n   * If the value is in the cache and not stale, then the returned\n   * Promise resolves to the value.\n   *\n   * If not in the cache, or beyond its TTL staleness, then\n   * `fetchMethod(key, staleValue, { options, signal, context })` is\n   * called, and the value returned will be added to the cache once\n   * resolved.\n   *\n   * If called with `allowStale`, and an asynchronous fetch is\n   * currently in progress to reload a stale value, then the former\n   * stale value will be returned.\n   *\n   * If called with `forceRefresh`, then the cached item will be\n   * re-fetched, even if it is not stale. However, if `allowStale` is also\n   * set, then the old value will still be returned. This is useful\n   * in cases where you want to force a reload of a cached value. If\n   * a background fetch is already in progress, then `forceRefresh`\n   * has no effect.\n   *\n   * If multiple fetches for the same key are issued, then they will all be\n   * coalesced into a single call to fetchMethod.\n   *\n   * Note that this means that handling options such as\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort},\n   * {@link LRUCache.FetchOptions.signal},\n   * and {@link LRUCache.OptionsBase.allowStaleOnFetchRejection} will be\n   * determined by the FIRST fetch() call for a given key.\n   *\n   * This is a known (fixable) shortcoming which will be addresed on when\n   * someone complains about it, as the fix would involve added complexity and\n   * may not be worth the costs for this edge case.\n   *\n   * If {@link LRUCache.OptionsBase.fetchMethod} is not specified, then this is\n   * effectively an alias for `Promise.resolve(cache.get(key))`.\n   *\n   * When the fetch method resolves to a value, if the fetch has not\n   * been aborted due to deletion, eviction, or being overwritten,\n   * then it is added to the cache using the options provided.\n   *\n   * If the key is evicted or deleted before the `fetchMethod`\n   * resolves, then the AbortSignal passed to the `fetchMethod` will\n   * receive an `abort` event, and the promise returned by `fetch()`\n   * will reject with the reason for the abort.\n   *\n   * If a `signal` is passed to the `fetch()` call, then aborting the\n   * signal will abort the fetch and cause the `fetch()` promise to\n   * reject with the reason provided.\n   *\n   * **Setting `context`**\n   *\n   * If an `FC` type is set to a type other than `unknown`, `void`, or\n   * `undefined` in the {@link LRUCache} constructor, then all\n   * calls to `cache.fetch()` _must_ provide a `context` option. If\n   * set to `undefined` or `void`, then calls to fetch _must not_\n   * provide a `context` option.\n   *\n   * The `context` param allows you to provide arbitrary data that\n   * might be relevant in the course of fetching the data. It is only\n   * relevant for the course of a single `fetch()` operation, and\n   * discarded afterwards.\n   *\n   * **Note: `fetch()` calls are inflight-unique**\n   *\n   * If you call `fetch()` multiple times with the same key value,\n   * then every call after the first will resolve on the same\n   * promise<sup>1</sup>,\n   * _even if they have different settings that would otherwise change\n   * the behavior of the fetch_, such as `noDeleteOnFetchRejection`\n   * or `ignoreFetchAbort`.\n   *\n   * In most cases, this is not a problem (in fact, only fetching\n   * something once is what you probably want, if you're caching in\n   * the first place). If you are changing the fetch() options\n   * dramatically between runs, there's a good chance that you might\n   * be trying to fit divergent semantics into a single object, and\n   * would be better off with multiple cache instances.\n   *\n   * **1**: Ie, they're not the \"same Promise\", but they resolve at\n   * the same time, because they're both waiting on the same\n   * underlying fetchMethod response.\n   */\n\n  fetch(\n    k: K,\n    fetchOptions: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : LRUCache.FetchOptionsWithContext<K, V, FC>\n  ): Promise<undefined | V>\n\n  // this overload not allowed if context is required\n  fetch(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    fetchOptions?: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : never\n  ): Promise<undefined | V>\n\n  async fetch(\n    k: K,\n    fetchOptions: LRUCache.FetchOptions<K, V, FC> = {}\n  ): Promise<undefined | V> {\n    const {\n      // get options\n      allowStale = this.allowStale,\n      updateAgeOnGet = this.updateAgeOnGet,\n      noDeleteOnStaleGet = this.noDeleteOnStaleGet,\n      // set options\n      ttl = this.ttl,\n      noDisposeOnSet = this.noDisposeOnSet,\n      size = 0,\n      sizeCalculation = this.sizeCalculation,\n      noUpdateTTL = this.noUpdateTTL,\n      // fetch exclusive options\n      noDeleteOnFetchRejection = this.noDeleteOnFetchRejection,\n      allowStaleOnFetchRejection = this.allowStaleOnFetchRejection,\n      ignoreFetchAbort = this.ignoreFetchAbort,\n      allowStaleOnFetchAbort = this.allowStaleOnFetchAbort,\n      context,\n      forceRefresh = false,\n      status,\n      signal,\n    } = fetchOptions\n\n    if (!this.#hasFetchMethod) {\n      if (status) status.fetch = 'get'\n      return this.get(k, {\n        allowStale,\n        updateAgeOnGet,\n        noDeleteOnStaleGet,\n        status,\n      })\n    }\n\n    const options = {\n      allowStale,\n      updateAgeOnGet,\n      noDeleteOnStaleGet,\n      ttl,\n      noDisposeOnSet,\n      size,\n      sizeCalculation,\n      noUpdateTTL,\n      noDeleteOnFetchRejection,\n      allowStaleOnFetchRejection,\n      allowStaleOnFetchAbort,\n      ignoreFetchAbort,\n      status,\n      signal,\n    }\n\n    let index = this.#keyMap.get(k)\n    if (index === undefined) {\n      if (status) status.fetch = 'miss'\n      const p = this.#backgroundFetch(k, index, options, context)\n      return (p.__returned = p)\n    } else {\n      // in cache, maybe already fetching\n      const v = this.#valList[index]\n      if (this.#isBackgroundFetch(v)) {\n        const stale =\n          allowStale && v.__staleWhileFetching !== undefined\n        if (status) {\n          status.fetch = 'inflight'\n          if (stale) status.returnedStale = true\n        }\n        return stale ? v.__staleWhileFetching : (v.__returned = v)\n      }\n\n      // if we force a refresh, that means do NOT serve the cached value,\n      // unless we are already in the process of refreshing the cache.\n      const isStale = this.#isStale(index)\n      if (!forceRefresh && !isStale) {\n        if (status) status.fetch = 'hit'\n        this.#moveToTail(index)\n        if (updateAgeOnGet) {\n          this.#updateItemAge(index)\n        }\n        if (status) this.#statusTTL(status, index)\n        return v\n      }\n\n      // ok, it is stale or a forced refresh, and not already fetching.\n      // refresh the cache.\n      const p = this.#backgroundFetch(k, index, options, context)\n      const hasStale = p.__staleWhileFetching !== undefined\n      const staleVal = hasStale && allowStale\n      if (status) {\n        status.fetch = isStale ? 'stale' : 'refresh'\n        if (staleVal && isStale) status.returnedStale = true\n      }\n      return staleVal ? p.__staleWhileFetching : (p.__returned = p)\n    }\n  }\n\n  /**\n   * In some cases, `cache.fetch()` may resolve to `undefined`, either because\n   * a {@link LRUCache.OptionsBase#fetchMethod} was not provided (turning\n   * `cache.fetch(k)` into just an async wrapper around `cache.get(k)`) or\n   * because `ignoreFetchAbort` was specified (either to the constructor or\n   * in the {@link LRUCache.FetchOptions}). Also, the\n   * {@link OptionsBase.fetchMethod} may return `undefined` or `void`, making\n   * the test even more complicated.\n   *\n   * Because inferring the cases where `undefined` might be returned are so\n   * cumbersome, but testing for `undefined` can also be annoying, this method\n   * can be used, which will reject if `this.fetch()` resolves to undefined.\n   */\n  forceFetch(\n    k: K,\n    fetchOptions: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : LRUCache.FetchOptionsWithContext<K, V, FC>\n  ): Promise<V>\n  // this overload not allowed if context is required\n  forceFetch(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    fetchOptions?: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : never\n  ): Promise<V>\n  async forceFetch(\n    k: K,\n    fetchOptions: LRUCache.FetchOptions<K, V, FC> = {}\n  ): Promise<V> {\n    const v = await this.fetch(\n      k,\n      fetchOptions as unknown extends FC\n        ? LRUCache.FetchOptions<K, V, FC>\n        : FC extends undefined | void\n        ? LRUCache.FetchOptionsNoContext<K, V>\n        : LRUCache.FetchOptionsWithContext<K, V, FC>\n    )\n    if (v === undefined) throw new Error('fetch() returned undefined')\n    return v\n  }\n\n  /**\n   * If the key is found in the cache, then this is equivalent to\n   * {@link LRUCache#get}. If not, in the cache, then calculate the value using\n   * the {@link LRUCache.OptionsBase.memoMethod}, and add it to the cache.\n   *\n   * If an `FC` type is set to a type other than `unknown`, `void`, or\n   * `undefined` in the LRUCache constructor, then all calls to `cache.memo()`\n   * _must_ provide a `context` option. If set to `undefined` or `void`, then\n   * calls to memo _must not_ provide a `context` option.\n   *\n   * The `context` param allows you to provide arbitrary data that might be\n   * relevant in the course of fetching the data. It is only relevant for the\n   * course of a single `memo()` operation, and discarded afterwards.\n   */\n  memo(\n    k: K,\n    memoOptions: unknown extends FC\n      ? LRUCache.MemoOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.MemoOptionsNoContext<K, V>\n      : LRUCache.MemoOptionsWithContext<K, V, FC>\n  ): V\n  // this overload not allowed if context is required\n  memo(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    memoOptions?: unknown extends FC\n      ? LRUCache.MemoOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.MemoOptionsNoContext<K, V>\n      : never\n  ): V\n  memo(k: K, memoOptions: LRUCache.MemoOptions<K, V, FC> = {}) {\n    const memoMethod = this.#memoMethod\n    if (!memoMethod) {\n      throw new Error('no memoMethod provided to constructor')\n    }\n    const { context, forceRefresh, ...options } = memoOptions\n    const v = this.get(k, options)\n    if (!forceRefresh && v !== undefined) return v\n    const vv = memoMethod(k, v, {\n      options,\n      context,\n    } as LRUCache.MemoizerOptions<K, V, FC>)\n    this.set(k, vv, options)\n    return vv\n  }\n\n  /**\n   * Return a value from the cache. Will update the recency of the cache\n   * entry found.\n   *\n   * If the key is not found, get() will return `undefined`.\n   */\n  get(k: K, getOptions: LRUCache.GetOptions<K, V, FC> = {}) {\n    const {\n      allowStale = this.allowStale,\n      updateAgeOnGet = this.updateAgeOnGet,\n      noDeleteOnStaleGet = this.noDeleteOnStaleGet,\n      status,\n    } = getOptions\n    const index = this.#keyMap.get(k)\n    if (index !== undefined) {\n      const value = this.#valList[index]\n      const fetching = this.#isBackgroundFetch(value)\n      if (status) this.#statusTTL(status, index)\n      if (this.#isStale(index)) {\n        if (status) status.get = 'stale'\n        // delete only if not an in-flight background fetch\n        if (!fetching) {\n          if (!noDeleteOnStaleGet) {\n            this.#delete(k, 'expire')\n          }\n          if (status && allowStale) status.returnedStale = true\n          return allowStale ? value : undefined\n        } else {\n          if (\n            status &&\n            allowStale &&\n            value.__staleWhileFetching !== undefined\n          ) {\n            status.returnedStale = true\n          }\n          return allowStale ? 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+  "names": ["perf", "warned", "PROCESS", "emitWarning", "msg", "type", "code", "fn", "AC", "AS", "_", "warnACPolyfill", "reason", "printACPolyfillWarning", "shouldWarn", "TYPE", "isPosInt", "n", "getUintArray", "max", "ZeroArray", "size", "_Stack", "HeapCls", "__privateSet", "_constructing", "s", "__privateGet", "Stack", "__privateAdd", "LRUCache", "#max", "#maxSize", "#dispose", "#disposeAfter", "#fetchMethod", "#memoMethod", "#size", "#calculatedSize", "#keyMap", "#keyList", "#valList", "#next", "#prev", "#head", "#tail", "#free", "#disposed", "#sizes", "#starts", "#ttls", "#hasDispose", "#hasFetchMethod", "#hasDisposeAfter", "c", "p", "#isBackgroundFetch", "k", "index", "options", "context", "#backgroundFetch", "#moveToTail", "#indexes", "#rindexes", "#isStale", "ttl", "ttlResolution", "ttlAutopurge", "updateAgeOnGet", "updateAgeOnHas", "allowStale", "dispose", "disposeAfter", "noDisposeOnSet", "noUpdateTTL", "maxSize", "maxEntrySize", "sizeCalculation", "fetchMethod", "memoMethod", "noDeleteOnFetchRejection", "noDeleteOnStaleGet", "allowStaleOnFetchRejection", "allowStaleOnFetchAbort", "ignoreFetchAbort", "UintArray", "#initializeSizeTracking", "#initializeTTLTracking", "key", "ttls", "starts", "#setItemTTL", "start", "t", "#delete", "#updateItemAge", "#statusTTL", "status", "cachedNow", "getNow", "age", "sizes", "#removeItemSize", "#requireSize", "v", "#addItemSize", "#evict", "_i", "_s", "_st", "_k", "_v", "i", "#isValidIndex", "getOptions", "value", "thisp", "deleted", "entry", "remain", "arr", "setOptions", "oldVal", "oldValue", "dt", "task", "val", "free", "head", "hasOptions", "peekOptions", "ac", "signal", "fetchOpts", "cb", "updateCache", "aborted", "ignoreAbort", "fetchFail", "bf", "eb", "er", "allowStaleAborted", "noDelete", "pcall", "res", "rej", "fmp", "b", "fetchOptions", "forceRefresh", "stale", "isStale", "staleVal", "memoOptions", "vv", "fetching", "#connect", "#clear", "pi", "ni"]
+}
diff --git a/mqtt-backend/node_modules/lru-cache/dist/commonjs/package.json b/mqtt-backend/node_modules/lru-cache/dist/commonjs/package.json
new file mode 100644
index 0000000..5bbefff
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/commonjs/package.json
@@ -0,0 +1,3 @@
+{
+  "type": "commonjs"
+}
diff --git a/mqtt-backend/node_modules/lru-cache/dist/esm/index.d.ts b/mqtt-backend/node_modules/lru-cache/dist/esm/index.d.ts
new file mode 100644
index 0000000..f59de76
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/esm/index.d.ts
@@ -0,0 +1,1277 @@
+/**
+ * @module LRUCache
+ */
+declare const TYPE: unique symbol;
+export type PosInt = number & {
+    [TYPE]: 'Positive Integer';
+};
+export type Index = number & {
+    [TYPE]: 'LRUCache Index';
+};
+export type UintArray = Uint8Array | Uint16Array | Uint32Array;
+export type NumberArray = UintArray | number[];
+declare class ZeroArray extends Array<number> {
+    constructor(size: number);
+}
+export type { ZeroArray };
+export type { Stack };
+export type StackLike = Stack | Index[];
+declare class Stack {
+    #private;
+    heap: NumberArray;
+    length: number;
+    static create(max: number): StackLike;
+    constructor(max: number, HeapCls: {
+        new (n: number): NumberArray;
+    });
+    push(n: Index): void;
+    pop(): Index;
+}
+/**
+ * Promise representing an in-progress {@link LRUCache#fetch} call
+ */
+export type BackgroundFetch<V> = Promise<V | undefined> & {
+    __returned: BackgroundFetch<V> | undefined;
+    __abortController: AbortController;
+    __staleWhileFetching: V | undefined;
+};
+export type DisposeTask<K, V> = [
+    value: V,
+    key: K,
+    reason: LRUCache.DisposeReason
+];
+export declare namespace LRUCache {
+    /**
+     * An integer greater than 0, reflecting the calculated size of items
+     */
+    type Size = number;
+    /**
+     * Integer greater than 0, representing some number of milliseconds, or the
+     * time at which a TTL started counting from.
+     */
+    type Milliseconds = number;
+    /**
+     * An integer greater than 0, reflecting a number of items
+     */
+    type Count = number;
+    /**
+     * The reason why an item was removed from the cache, passed
+     * to the {@link Disposer} methods.
+     *
+     * - `evict`: The item was evicted because it is the least recently used,
+     *   and the cache is full.
+     * - `set`: A new value was set, overwriting the old value being disposed.
+     * - `delete`: The item was explicitly deleted, either by calling
+     *   {@link LRUCache#delete}, {@link LRUCache#clear}, or
+     *   {@link LRUCache#set} with an undefined value.
+     * - `expire`: The item was removed due to exceeding its TTL.
+     * - `fetch`: A {@link OptionsBase#fetchMethod} operation returned
+     *   `undefined` or was aborted, causing the item to be deleted.
+     */
+    type DisposeReason = 'evict' | 'set' | 'delete' | 'expire' | 'fetch';
+    /**
+     * A method called upon item removal, passed as the
+     * {@link OptionsBase.dispose} and/or
+     * {@link OptionsBase.disposeAfter} options.
+     */
+    type Disposer<K, V> = (value: V, key: K, reason: DisposeReason) => void;
+    /**
+     * A function that returns the effective calculated size
+     * of an entry in the cache.
+     */
+    type SizeCalculator<K, V> = (value: V, key: K) => Size;
+    /**
+     * Options provided to the
+     * {@link OptionsBase.fetchMethod} function.
+     */
+    interface FetcherOptions<K, V, FC = unknown> {
+        signal: AbortSignal;
+        options: FetcherFetchOptions<K, V, FC>;
+        /**
+         * Object provided in the {@link FetchOptions.context} option to
+         * {@link LRUCache#fetch}
+         */
+        context: FC;
+    }
+    /**
+     * Occasionally, it may be useful to track the internal behavior of the
+     * cache, particularly for logging, debugging, or for behavior within the
+     * `fetchMethod`. To do this, you can pass a `status` object to the
+     * {@link LRUCache#fetch}, {@link LRUCache#get}, {@link LRUCache#set},
+     * {@link LRUCache#memo}, and {@link LRUCache#has} methods.
+     *
+     * The `status` option should be a plain JavaScript object. The following
+     * fields will be set on it appropriately, depending on the situation.
+     */
+    interface Status<V> {
+        /**
+         * The status of a set() operation.
+         *
+         * - add: the item was not found in the cache, and was added
+         * - update: the item was in the cache, with the same value provided
+         * - replace: the item was in the cache, and replaced
+         * - miss: the item was not added to the cache for some reason
+         */
+        set?: 'add' | 'update' | 'replace' | 'miss';
+        /**
+         * the ttl stored for the item, or undefined if ttls are not used.
+         */
+        ttl?: Milliseconds;
+        /**
+         * the start time for the item, or undefined if ttls are not used.
+         */
+        start?: Milliseconds;
+        /**
+         * The timestamp used for TTL calculation
+         */
+        now?: Milliseconds;
+        /**
+         * the remaining ttl for the item, or undefined if ttls are not used.
+         */
+        remainingTTL?: Milliseconds;
+        /**
+         * The calculated size for the item, if sizes are used.
+         */
+        entrySize?: Size;
+        /**
+         * The total calculated size of the cache, if sizes are used.
+         */
+        totalCalculatedSize?: Size;
+        /**
+         * A flag indicating that the item was not stored, due to exceeding the
+         * {@link OptionsBase.maxEntrySize}
+         */
+        maxEntrySizeExceeded?: true;
+        /**
+         * The old value, specified in the case of `set:'update'` or
+         * `set:'replace'`
+         */
+        oldValue?: V;
+        /**
+         * The results of a {@link LRUCache#has} operation
+         *
+         * - hit: the item was found in the cache
+         * - stale: the item was found in the cache, but is stale
+         * - miss: the item was not found in the cache
+         */
+        has?: 'hit' | 'stale' | 'miss';
+        /**
+         * The status of a {@link LRUCache#fetch} operation.
+         * Note that this can change as the underlying fetch() moves through
+         * various states.
+         *
+         * - inflight: there is another fetch() for this key which is in process
+         * - get: there is no {@link OptionsBase.fetchMethod}, so
+         *   {@link LRUCache#get} was called.
+         * - miss: the item is not in cache, and will be fetched.
+         * - hit: the item is in the cache, and was resolved immediately.
+         * - stale: the item is in the cache, but stale.
+         * - refresh: the item is in the cache, and not stale, but
+         *   {@link FetchOptions.forceRefresh} was specified.
+         */
+        fetch?: 'get' | 'inflight' | 'miss' | 'hit' | 'stale' | 'refresh';
+        /**
+         * The {@link OptionsBase.fetchMethod} was called
+         */
+        fetchDispatched?: true;
+        /**
+         * The cached value was updated after a successful call to
+         * {@link OptionsBase.fetchMethod}
+         */
+        fetchUpdated?: true;
+        /**
+         * The reason for a fetch() rejection.  Either the error raised by the
+         * {@link OptionsBase.fetchMethod}, or the reason for an
+         * AbortSignal.
+         */
+        fetchError?: Error;
+        /**
+         * The fetch received an abort signal
+         */
+        fetchAborted?: true;
+        /**
+         * The abort signal received was ignored, and the fetch was allowed to
+         * continue.
+         */
+        fetchAbortIgnored?: true;
+        /**
+         * The fetchMethod promise resolved successfully
+         */
+        fetchResolved?: true;
+        /**
+         * The fetchMethod promise was rejected
+         */
+        fetchRejected?: true;
+        /**
+         * The status of a {@link LRUCache#get} operation.
+         *
+         * - fetching: The item is currently being fetched.  If a previous value
+         *   is present and allowed, that will be returned.
+         * - stale: The item is in the cache, and is stale.
+         * - hit: the item is in the cache
+         * - miss: the item is not in the cache
+         */
+        get?: 'stale' | 'hit' | 'miss';
+        /**
+         * A fetch or get operation returned a stale value.
+         */
+        returnedStale?: true;
+    }
+    /**
+     * options which override the options set in the LRUCache constructor
+     * when calling {@link LRUCache#fetch}.
+     *
+     * This is the union of {@link GetOptions} and {@link SetOptions}, plus
+     * {@link OptionsBase.noDeleteOnFetchRejection},
+     * {@link OptionsBase.allowStaleOnFetchRejection},
+     * {@link FetchOptions.forceRefresh}, and
+     * {@link FetcherOptions.context}
+     *
+     * Any of these may be modified in the {@link OptionsBase.fetchMethod}
+     * function, but the {@link GetOptions} fields will of course have no
+     * effect, as the {@link LRUCache#get} call already happened by the time
+     * the fetchMethod is called.
+     */
+    interface FetcherFetchOptions<K, V, FC = unknown> extends Pick<OptionsBase<K, V, FC>, 'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet' | 'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL' | 'noDeleteOnFetchRejection' | 'allowStaleOnFetchRejection' | 'ignoreFetchAbort' | 'allowStaleOnFetchAbort'> {
+        status?: Status<V>;
+        size?: Size;
+    }
+    /**
+     * Options that may be passed to the {@link LRUCache#fetch} method.
+     */
+    interface FetchOptions<K, V, FC> extends FetcherFetchOptions<K, V, FC> {
+        /**
+         * Set to true to force a re-load of the existing data, even if it
+         * is not yet stale.
+         */
+        forceRefresh?: boolean;
+        /**
+         * Context provided to the {@link OptionsBase.fetchMethod} as
+         * the {@link FetcherOptions.context} param.
+         *
+         * If the FC type is specified as unknown (the default),
+         * undefined or void, then this is optional.  Otherwise, it will
+         * be required.
+         */
+        context?: FC;
+        signal?: AbortSignal;
+        status?: Status<V>;
+    }
+    /**
+     * Options provided to {@link LRUCache#fetch} when the FC type is something
+     * other than `unknown`, `undefined`, or `void`
+     */
+    interface FetchOptionsWithContext<K, V, FC> extends FetchOptions<K, V, FC> {
+        context: FC;
+    }
+    /**
+     * Options provided to {@link LRUCache#fetch} when the FC type is
+     * `undefined` or `void`
+     */
+    interface FetchOptionsNoContext<K, V> extends FetchOptions<K, V, undefined> {
+        context?: undefined;
+    }
+    interface MemoOptions<K, V, FC = unknown> extends Pick<OptionsBase<K, V, FC>, 'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet' | 'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL' | 'noDeleteOnFetchRejection' | 'allowStaleOnFetchRejection' | 'ignoreFetchAbort' | 'allowStaleOnFetchAbort'> {
+        /**
+         * Set to true to force a re-load of the existing data, even if it
+         * is not yet stale.
+         */
+        forceRefresh?: boolean;
+        /**
+         * Context provided to the {@link OptionsBase.memoMethod} as
+         * the {@link MemoizerOptions.context} param.
+         *
+         * If the FC type is specified as unknown (the default),
+         * undefined or void, then this is optional.  Otherwise, it will
+         * be required.
+         */
+        context?: FC;
+        status?: Status<V>;
+    }
+    /**
+     * Options provided to {@link LRUCache#memo} when the FC type is something
+     * other than `unknown`, `undefined`, or `void`
+     */
+    interface MemoOptionsWithContext<K, V, FC> extends MemoOptions<K, V, FC> {
+        context: FC;
+    }
+    /**
+     * Options provided to {@link LRUCache#memo} when the FC type is
+     * `undefined` or `void`
+     */
+    interface MemoOptionsNoContext<K, V> extends MemoOptions<K, V, undefined> {
+        context?: undefined;
+    }
+    /**
+     * Options provided to the
+     * {@link OptionsBase.memoMethod} function.
+     */
+    interface MemoizerOptions<K, V, FC = unknown> {
+        options: MemoizerMemoOptions<K, V, FC>;
+        /**
+         * Object provided in the {@link MemoOptions.context} option to
+         * {@link LRUCache#memo}
+         */
+        context: FC;
+    }
+    /**
+     * options which override the options set in the LRUCache constructor
+     * when calling {@link LRUCache#memo}.
+     *
+     * This is the union of {@link GetOptions} and {@link SetOptions}, plus
+     * {@link MemoOptions.forceRefresh}, and
+     * {@link MemoerOptions.context}
+     *
+     * Any of these may be modified in the {@link OptionsBase.memoMethod}
+     * function, but the {@link GetOptions} fields will of course have no
+     * effect, as the {@link LRUCache#get} call already happened by the time
+     * the memoMethod is called.
+     */
+    interface MemoizerMemoOptions<K, V, FC = unknown> extends Pick<OptionsBase<K, V, FC>, 'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet' | 'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL'> {
+        status?: Status<V>;
+        size?: Size;
+        start?: Milliseconds;
+    }
+    /**
+     * Options that may be passed to the {@link LRUCache#has} method.
+     */
+    interface HasOptions<K, V, FC> extends Pick<OptionsBase<K, V, FC>, 'updateAgeOnHas'> {
+        status?: Status<V>;
+    }
+    /**
+     * Options that may be passed to the {@link LRUCache#get} method.
+     */
+    interface GetOptions<K, V, FC> extends Pick<OptionsBase<K, V, FC>, 'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet'> {
+        status?: Status<V>;
+    }
+    /**
+     * Options that may be passed to the {@link LRUCache#peek} method.
+     */
+    interface PeekOptions<K, V, FC> extends Pick<OptionsBase<K, V, FC>, 'allowStale'> {
+    }
+    /**
+     * Options that may be passed to the {@link LRUCache#set} method.
+     */
+    interface SetOptions<K, V, FC> extends Pick<OptionsBase<K, V, FC>, 'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL'> {
+        /**
+         * If size tracking is enabled, then setting an explicit size
+         * in the {@link LRUCache#set} call will prevent calling the
+         * {@link OptionsBase.sizeCalculation} function.
+         */
+        size?: Size;
+        /**
+         * If TTL tracking is enabled, then setting an explicit start
+         * time in the {@link LRUCache#set} call will override the
+         * default time from `performance.now()` or `Date.now()`.
+         *
+         * Note that it must be a valid value for whichever time-tracking
+         * method is in use.
+         */
+        start?: Milliseconds;
+        status?: Status<V>;
+    }
+    /**
+     * The type signature for the {@link OptionsBase.fetchMethod} option.
+     */
+    type Fetcher<K, V, FC = unknown> = (key: K, staleValue: V | undefined, options: FetcherOptions<K, V, FC>) => Promise<V | undefined | void> | V | undefined | void;
+    /**
+     * the type signature for the {@link OptionsBase.memoMethod} option.
+     */
+    type Memoizer<K, V, FC = unknown> = (key: K, staleValue: V | undefined, options: MemoizerOptions<K, V, FC>) => V;
+    /**
+     * Options which may be passed to the {@link LRUCache} constructor.
+     *
+     * Most of these may be overridden in the various options that use
+     * them.
+     *
+     * Despite all being technically optional, the constructor requires that
+     * a cache is at minimum limited by one or more of {@link OptionsBase.max},
+     * {@link OptionsBase.ttl}, or {@link OptionsBase.maxSize}.
+     *
+     * If {@link OptionsBase.ttl} is used alone, then it is strongly advised
+     * (and in fact required by the type definitions here) that the cache
+     * also set {@link OptionsBase.ttlAutopurge}, to prevent potentially
+     * unbounded storage.
+     *
+     * All options are also available on the {@link LRUCache} instance, making
+     * it safe to pass an LRUCache instance as the options argumemnt to
+     * make another empty cache of the same type.
+     *
+     * Some options are marked as read-only, because changing them after
+     * instantiation is not safe. Changing any of the other options will of
+     * course only have an effect on subsequent method calls.
+     */
+    interface OptionsBase<K, V, FC> {
+        /**
+         * The maximum number of items to store in the cache before evicting
+         * old entries. This is read-only on the {@link LRUCache} instance,
+         * and may not be overridden.
+         *
+         * If set, then storage space will be pre-allocated at construction
+         * time, and the cache will perform significantly faster.
+         *
+         * Note that significantly fewer items may be stored, if
+         * {@link OptionsBase.maxSize} and/or {@link OptionsBase.ttl} are also
+         * set.
+         *
+         * **It is strongly recommended to set a `max` to prevent unbounded growth
+         * of the cache.**
+         */
+        max?: Count;
+        /**
+         * Max time in milliseconds for items to live in cache before they are
+         * considered stale.  Note that stale items are NOT preemptively removed by
+         * default, and MAY live in the cache, contributing to its LRU max, long
+         * after they have expired, unless {@link OptionsBase.ttlAutopurge} is
+         * set.
+         *
+         * If set to `0` (the default value), then that means "do not track
+         * TTL", not "expire immediately".
+         *
+         * Also, as this cache is optimized for LRU/MRU operations, some of
+         * the staleness/TTL checks will reduce performance, as they will incur
+         * overhead by deleting items.
+         *
+         * This is not primarily a TTL cache, and does not make strong TTL
+         * guarantees. There is no pre-emptive pruning of expired items, but you
+         * _may_ set a TTL on the cache, and it will treat expired items as missing
+         * when they are fetched, and delete them.
+         *
+         * Optional, but must be a non-negative integer in ms if specified.
+         *
+         * This may be overridden by passing an options object to `cache.set()`.
+         *
+         * At least one of `max`, `maxSize`, or `TTL` is required. This must be a
+         * positive integer if set.
+         *
+         * Even if ttl tracking is enabled, **it is strongly recommended to set a
+         * `max` to prevent unbounded growth of the cache.**
+         *
+         * If ttl tracking is enabled, and `max` and `maxSize` are not set,
+         * and `ttlAutopurge` is not set, then a warning will be emitted
+         * cautioning about the potential for unbounded memory consumption.
+         * (The TypeScript definitions will also discourage this.)
+         */
+        ttl?: Milliseconds;
+        /**
+         * Minimum amount of time in ms in which to check for staleness.
+         * Defaults to 1, which means that the current time is checked
+         * at most once per millisecond.
+         *
+         * Set to 0 to check the current time every time staleness is tested.
+         * (This reduces performance, and is theoretically unnecessary.)
+         *
+         * Setting this to a higher value will improve performance somewhat
+         * while using ttl tracking, albeit at the expense of keeping stale
+         * items around a bit longer than their TTLs would indicate.
+         *
+         * @default 1
+         */
+        ttlResolution?: Milliseconds;
+        /**
+         * Preemptively remove stale items from the cache.
+         *
+         * Note that this may *significantly* degrade performance, especially if
+         * the cache is storing a large number of items. It is almost always best
+         * to just leave the stale items in the cache, and let them fall out as new
+         * items are added.
+         *
+         * Note that this means that {@link OptionsBase.allowStale} is a bit
+         * pointless, as stale items will be deleted almost as soon as they
+         * expire.
+         *
+         * Use with caution!
+         */
+        ttlAutopurge?: boolean;
+        /**
+         * When using time-expiring entries with `ttl`, setting this to `true` will
+         * make each item's age reset to 0 whenever it is retrieved from cache with
+         * {@link LRUCache#get}, causing it to not expire. (It can still fall out
+         * of cache based on recency of use, of course.)
+         *
+         * Has no effect if {@link OptionsBase.ttl} is not set.
+         *
+         * This may be overridden by passing an options object to `cache.get()`.
+         */
+        updateAgeOnGet?: boolean;
+        /**
+         * When using time-expiring entries with `ttl`, setting this to `true` will
+         * make each item's age reset to 0 whenever its presence in the cache is
+         * checked with {@link LRUCache#has}, causing it to not expire. (It can
+         * still fall out of cache based on recency of use, of course.)
+         *
+         * Has no effect if {@link OptionsBase.ttl} is not set.
+         */
+        updateAgeOnHas?: boolean;
+        /**
+         * Allow {@link LRUCache#get} and {@link LRUCache#fetch} calls to return
+         * stale data, if available.
+         *
+         * By default, if you set `ttl`, stale items will only be deleted from the
+         * cache when you `get(key)`. That is, it's not preemptively pruning items,
+         * unless {@link OptionsBase.ttlAutopurge} is set.
+         *
+         * If you set `allowStale:true`, it'll return the stale value *as well as*
+         * deleting it. If you don't set this, then it'll return `undefined` when
+         * you try to get a stale entry.
+         *
+         * Note that when a stale entry is fetched, _even if it is returned due to
+         * `allowStale` being set_, it is removed from the cache immediately. You
+         * can suppress this behavior by setting
+         * {@link OptionsBase.noDeleteOnStaleGet}, either in the constructor, or in
+         * the options provided to {@link LRUCache#get}.
+         *
+         * This may be overridden by passing an options object to `cache.get()`.
+         * The `cache.has()` method will always return `false` for stale items.
+         *
+         * Only relevant if a ttl is set.
+         */
+        allowStale?: boolean;
+        /**
+         * Function that is called on items when they are dropped from the
+         * cache, as `dispose(value, key, reason)`.
+         *
+         * This can be handy if you want to close file descriptors or do
+         * other cleanup tasks when items are no longer stored in the cache.
+         *
+         * **NOTE**: It is called _before_ the item has been fully removed
+         * from the cache, so if you want to put it right back in, you need
+         * to wait until the next tick. If you try to add it back in during
+         * the `dispose()` function call, it will break things in subtle and
+         * weird ways.
+         *
+         * Unlike several other options, this may _not_ be overridden by
+         * passing an option to `set()`, for performance reasons.
+         *
+         * The `reason` will be one of the following strings, corresponding
+         * to the reason for the item's deletion:
+         *
+         * - `evict` Item was evicted to make space for a new addition
+         * - `set` Item was overwritten by a new value
+         * - `expire` Item expired its TTL
+         * - `fetch` Item was deleted due to a failed or aborted fetch, or a
+         *   fetchMethod returning `undefined.
+         * - `delete` Item was removed by explicit `cache.delete(key)`,
+         *   `cache.clear()`, or `cache.set(key, undefined)`.
+         */
+        dispose?: Disposer<K, V>;
+        /**
+         * The same as {@link OptionsBase.dispose}, but called *after* the entry
+         * is completely removed and the cache is once again in a clean state.
+         *
+         * It is safe to add an item right back into the cache at this point.
+         * However, note that it is *very* easy to inadvertently create infinite
+         * recursion this way.
+         */
+        disposeAfter?: Disposer<K, V>;
+        /**
+         * Set to true to suppress calling the
+         * {@link OptionsBase.dispose} function if the entry key is
+         * still accessible within the cache.
+         *
+         * This may be overridden by passing an options object to
+         * {@link LRUCache#set}.
+         *
+         * Only relevant if `dispose` or `disposeAfter` are set.
+         */
+        noDisposeOnSet?: boolean;
+        /**
+         * Boolean flag to tell the cache to not update the TTL when setting a new
+         * value for an existing key (ie, when updating a value rather than
+         * inserting a new value).  Note that the TTL value is _always_ set (if
+         * provided) when adding a new entry into the cache.
+         *
+         * Has no effect if a {@link OptionsBase.ttl} is not set.
+         *
+         * May be passed as an option to {@link LRUCache#set}.
+         */
+        noUpdateTTL?: boolean;
+        /**
+         * Set to a positive integer to track the sizes of items added to the
+         * cache, and automatically evict items in order to stay below this size.
+         * Note that this may result in fewer than `max` items being stored.
+         *
+         * Attempting to add an item to the cache whose calculated size is greater
+         * that this amount will be a no-op. The item will not be cached, and no
+         * other items will be evicted.
+         *
+         * Optional, must be a positive integer if provided.
+         *
+         * Sets `maxEntrySize` to the same value, unless a different value is
+         * provided for `maxEntrySize`.
+         *
+         * At least one of `max`, `maxSize`, or `TTL` is required. This must be a
+         * positive integer if set.
+         *
+         * Even if size tracking is enabled, **it is strongly recommended to set a
+         * `max` to prevent unbounded growth of the cache.**
+         *
+         * Note also that size tracking can negatively impact performance,
+         * though for most cases, only minimally.
+         */
+        maxSize?: Size;
+        /**
+         * The maximum allowed size for any single item in the cache.
+         *
+         * If a larger item is passed to {@link LRUCache#set} or returned by a
+         * {@link OptionsBase.fetchMethod} or {@link OptionsBase.memoMethod}, then
+         * it will not be stored in the cache.
+         *
+         * Attempting to add an item whose calculated size is greater than
+         * this amount will not cache the item or evict any old items, but
+         * WILL delete an existing value if one is already present.
+         *
+         * Optional, must be a positive integer if provided. Defaults to
+         * the value of `maxSize` if provided.
+         */
+        maxEntrySize?: Size;
+        /**
+         * A function that returns a number indicating the item's size.
+         *
+         * Requires {@link OptionsBase.maxSize} to be set.
+         *
+         * If not provided, and {@link OptionsBase.maxSize} or
+         * {@link OptionsBase.maxEntrySize} are set, then all
+         * {@link LRUCache#set} calls **must** provide an explicit
+         * {@link SetOptions.size} or sizeCalculation param.
+         */
+        sizeCalculation?: SizeCalculator<K, V>;
+        /**
+         * Method that provides the implementation for {@link LRUCache#fetch}
+         *
+         * ```ts
+         * fetchMethod(key, staleValue, { signal, options, context })
+         * ```
+         *
+         * If `fetchMethod` is not provided, then `cache.fetch(key)` is equivalent
+         * to `Promise.resolve(cache.get(key))`.
+         *
+         * If at any time, `signal.aborted` is set to `true`, or if the
+         * `signal.onabort` method is called, or if it emits an `'abort'` event
+         * which you can listen to with `addEventListener`, then that means that
+         * the fetch should be abandoned. This may be passed along to async
+         * functions aware of AbortController/AbortSignal behavior.
+         *
+         * The `fetchMethod` should **only** return `undefined` or a Promise
+         * resolving to `undefined` if the AbortController signaled an `abort`
+         * event. In all other cases, it should return or resolve to a value
+         * suitable for adding to the cache.
+         *
+         * The `options` object is a union of the options that may be provided to
+         * `set()` and `get()`. If they are modified, then that will result in
+         * modifying the settings to `cache.set()` when the value is resolved, and
+         * in the case of
+         * {@link OptionsBase.noDeleteOnFetchRejection} and
+         * {@link OptionsBase.allowStaleOnFetchRejection}, the handling of
+         * `fetchMethod` failures.
+         *
+         * For example, a DNS cache may update the TTL based on the value returned
+         * from a remote DNS server by changing `options.ttl` in the `fetchMethod`.
+         */
+        fetchMethod?: Fetcher<K, V, FC>;
+        /**
+         * Method that provides the implementation for {@link LRUCache#memo}
+         */
+        memoMethod?: Memoizer<K, V, FC>;
+        /**
+         * Set to true to suppress the deletion of stale data when a
+         * {@link OptionsBase.fetchMethod} returns a rejected promise.
+         */
+        noDeleteOnFetchRejection?: boolean;
+        /**
+         * Do not delete stale items when they are retrieved with
+         * {@link LRUCache#get}.
+         *
+         * Note that the `get` return value will still be `undefined`
+         * unless {@link OptionsBase.allowStale} is true.
+         *
+         * When using time-expiring entries with `ttl`, by default stale
+         * items will be removed from the cache when the key is accessed
+         * with `cache.get()`.
+         *
+         * Setting this option will cause stale items to remain in the cache, until
+         * they are explicitly deleted with `cache.delete(key)`, or retrieved with
+         * `noDeleteOnStaleGet` set to `false`.
+         *
+         * This may be overridden by passing an options object to `cache.get()`.
+         *
+         * Only relevant if a ttl is used.
+         */
+        noDeleteOnStaleGet?: boolean;
+        /**
+         * Set to true to allow returning stale data when a
+         * {@link OptionsBase.fetchMethod} throws an error or returns a rejected
+         * promise.
+         *
+         * This differs from using {@link OptionsBase.allowStale} in that stale
+         * data will ONLY be returned in the case that the {@link LRUCache#fetch}
+         * fails, not any other times.
+         *
+         * If a `fetchMethod` fails, and there is no stale value available, the
+         * `fetch()` will resolve to `undefined`. Ie, all `fetchMethod` errors are
+         * suppressed.
+         *
+         * Implies `noDeleteOnFetchRejection`.
+         *
+         * This may be set in calls to `fetch()`, or defaulted on the constructor,
+         * or overridden by modifying the options object in the `fetchMethod`.
+         */
+        allowStaleOnFetchRejection?: boolean;
+        /**
+         * Set to true to return a stale value from the cache when the
+         * `AbortSignal` passed to the {@link OptionsBase.fetchMethod} dispatches
+         * an `'abort'` event, whether user-triggered, or due to internal cache
+         * behavior.
+         *
+         * Unless {@link OptionsBase.ignoreFetchAbort} is also set, the underlying
+         * {@link OptionsBase.fetchMethod} will still be considered canceled, and
+         * any value it returns will be ignored and not cached.
+         *
+         * Caveat: since fetches are aborted when a new value is explicitly
+         * set in the cache, this can lead to fetch returning a stale value,
+         * since that was the fallback value _at the moment the `fetch()` was
+         * initiated_, even though the new updated value is now present in
+         * the cache.
+         *
+         * For example:
+         *
+         * ```ts
+         * const cache = new LRUCache<string, any>({
+         *   ttl: 100,
+         *   fetchMethod: async (url, oldValue, { signal }) =>  {
+         *     const res = await fetch(url, { signal })
+         *     return await res.json()
+         *   }
+         * })
+         * cache.set('https://example.com/', { some: 'data' })
+         * // 100ms go by...
+         * const result = cache.fetch('https://example.com/')
+         * cache.set('https://example.com/', { other: 'thing' })
+         * console.log(await result) // { some: 'data' }
+         * console.log(cache.get('https://example.com/')) // { other: 'thing' }
+         * ```
+         */
+        allowStaleOnFetchAbort?: boolean;
+        /**
+         * Set to true to ignore the `abort` event emitted by the `AbortSignal`
+         * object passed to {@link OptionsBase.fetchMethod}, and still cache the
+         * resulting resolution value, as long as it is not `undefined`.
+         *
+         * When used on its own, this means aborted {@link LRUCache#fetch} calls
+         * are not immediately resolved or rejected when they are aborted, and
+         * instead take the full time to await.
+         *
+         * When used with {@link OptionsBase.allowStaleOnFetchAbort}, aborted
+         * {@link LRUCache#fetch} calls will resolve immediately to their stale
+         * cached value or `undefined`, and will continue to process and eventually
+         * update the cache when they resolve, as long as the resulting value is
+         * not `undefined`, thus supporting a "return stale on timeout while
+         * refreshing" mechanism by passing `AbortSignal.timeout(n)` as the signal.
+         *
+         * For example:
+         *
+         * ```ts
+         * const c = new LRUCache({
+         *   ttl: 100,
+         *   ignoreFetchAbort: true,
+         *   allowStaleOnFetchAbort: true,
+         *   fetchMethod: async (key, oldValue, { signal }) => {
+         *     // note: do NOT pass the signal to fetch()!
+         *     // let's say this fetch can take a long time.
+         *     const res = await fetch(`https://slow-backend-server/${key}`)
+         *     return await res.json()
+         *   },
+         * })
+         *
+         * // this will return the stale value after 100ms, while still
+         * // updating in the background for next time.
+         * const val = await c.fetch('key', { signal: AbortSignal.timeout(100) })
+         * ```
+         *
+         * **Note**: regardless of this setting, an `abort` event _is still
+         * emitted on the `AbortSignal` object_, so may result in invalid results
+         * when passed to other underlying APIs that use AbortSignals.
+         *
+         * This may be overridden in the {@link OptionsBase.fetchMethod} or the
+         * call to {@link LRUCache#fetch}.
+         */
+        ignoreFetchAbort?: boolean;
+    }
+    interface OptionsMaxLimit<K, V, FC> extends OptionsBase<K, V, FC> {
+        max: Count;
+    }
+    interface OptionsTTLLimit<K, V, FC> extends OptionsBase<K, V, FC> {
+        ttl: Milliseconds;
+        ttlAutopurge: boolean;
+    }
+    interface OptionsSizeLimit<K, V, FC> extends OptionsBase<K, V, FC> {
+        maxSize: Size;
+    }
+    /**
+     * The valid safe options for the {@link LRUCache} constructor
+     */
+    type Options<K, V, FC> = OptionsMaxLimit<K, V, FC> | OptionsSizeLimit<K, V, FC> | OptionsTTLLimit<K, V, FC>;
+    /**
+     * Entry objects used by {@link LRUCache#load} and {@link LRUCache#dump},
+     * and returned by {@link LRUCache#info}.
+     */
+    interface Entry<V> {
+        value: V;
+        ttl?: Milliseconds;
+        size?: Size;
+        start?: Milliseconds;
+    }
+}
+/**
+ * Default export, the thing you're using this module to get.
+ *
+ * The `K` and `V` types define the key and value types, respectively. The
+ * optional `FC` type defines the type of the `context` object passed to
+ * `cache.fetch()` and `cache.memo()`.
+ *
+ * Keys and values **must not** be `null` or `undefined`.
+ *
+ * All properties from the options object (with the exception of `max`,
+ * `maxSize`, `fetchMethod`, `memoMethod`, `dispose` and `disposeAfter`) are
+ * added as normal public members. (The listed options are read-only getters.)
+ *
+ * Changing any of these will alter the defaults for subsequent method calls.
+ */
+export declare class LRUCache<K extends {}, V extends {}, FC = unknown> implements Map<K, V> {
+    #private;
+    /**
+     * {@link LRUCache.OptionsBase.ttl}
+     */
+    ttl: LRUCache.Milliseconds;
+    /**
+     * {@link LRUCache.OptionsBase.ttlResolution}
+     */
+    ttlResolution: LRUCache.Milliseconds;
+    /**
+     * {@link LRUCache.OptionsBase.ttlAutopurge}
+     */
+    ttlAutopurge: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.updateAgeOnGet}
+     */
+    updateAgeOnGet: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.updateAgeOnHas}
+     */
+    updateAgeOnHas: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.allowStale}
+     */
+    allowStale: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.noDisposeOnSet}
+     */
+    noDisposeOnSet: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.noUpdateTTL}
+     */
+    noUpdateTTL: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.maxEntrySize}
+     */
+    maxEntrySize: LRUCache.Size;
+    /**
+     * {@link LRUCache.OptionsBase.sizeCalculation}
+     */
+    sizeCalculation?: LRUCache.SizeCalculator<K, V>;
+    /**
+     * {@link LRUCache.OptionsBase.noDeleteOnFetchRejection}
+     */
+    noDeleteOnFetchRejection: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.noDeleteOnStaleGet}
+     */
+    noDeleteOnStaleGet: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort}
+     */
+    allowStaleOnFetchAbort: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.allowStaleOnFetchRejection}
+     */
+    allowStaleOnFetchRejection: boolean;
+    /**
+     * {@link LRUCache.OptionsBase.ignoreFetchAbort}
+     */
+    ignoreFetchAbort: boolean;
+    /**
+     * Do not call this method unless you need to inspect the
+     * inner workings of the cache.  If anything returned by this
+     * object is modified in any way, strange breakage may occur.
+     *
+     * These fields are private for a reason!
+     *
+     * @internal
+     */
+    static unsafeExposeInternals<K extends {}, V extends {}, FC extends unknown = unknown>(c: LRUCache<K, V, FC>): {
+        starts: ZeroArray | undefined;
+        ttls: ZeroArray | undefined;
+        sizes: ZeroArray | undefined;
+        keyMap: Map<K, number>;
+        keyList: (K | undefined)[];
+        valList: (V | BackgroundFetch<V> | undefined)[];
+        next: NumberArray;
+        prev: NumberArray;
+        readonly head: Index;
+        readonly tail: Index;
+        free: StackLike;
+        isBackgroundFetch: (p: any) => boolean;
+        backgroundFetch: (k: K, index: number | undefined, options: LRUCache.FetchOptions<K, V, FC>, context: any) => BackgroundFetch<V>;
+        moveToTail: (index: number) => void;
+        indexes: (options?: {
+            allowStale: boolean;
+        }) => Generator<Index, void, unknown>;
+        rindexes: (options?: {
+            allowStale: boolean;
+        }) => Generator<Index, void, unknown>;
+        isStale: (index: number | undefined) => boolean;
+    };
+    /**
+     * {@link LRUCache.OptionsBase.max} (read-only)
+     */
+    get max(): LRUCache.Count;
+    /**
+     * {@link LRUCache.OptionsBase.maxSize} (read-only)
+     */
+    get maxSize(): LRUCache.Count;
+    /**
+     * The total computed size of items in the cache (read-only)
+     */
+    get calculatedSize(): LRUCache.Size;
+    /**
+     * The number of items stored in the cache (read-only)
+     */
+    get size(): LRUCache.Count;
+    /**
+     * {@link LRUCache.OptionsBase.fetchMethod} (read-only)
+     */
+    get fetchMethod(): LRUCache.Fetcher<K, V, FC> | undefined;
+    get memoMethod(): LRUCache.Memoizer<K, V, FC> | undefined;
+    /**
+     * {@link LRUCache.OptionsBase.dispose} (read-only)
+     */
+    get dispose(): LRUCache.Disposer<K, V> | undefined;
+    /**
+     * {@link LRUCache.OptionsBase.disposeAfter} (read-only)
+     */
+    get disposeAfter(): LRUCache.Disposer<K, V> | undefined;
+    constructor(options: LRUCache.Options<K, V, FC> | LRUCache<K, V, FC>);
+    /**
+     * Return the number of ms left in the item's TTL. If item is not in cache,
+     * returns `0`. Returns `Infinity` if item is in cache without a defined TTL.
+     */
+    getRemainingTTL(key: K): number;
+    /**
+     * Return a generator yielding `[key, value]` pairs,
+     * in order from most recently used to least recently used.
+     */
+    entries(): Generator<[K, V], void, unknown>;
+    /**
+     * Inverse order version of {@link LRUCache.entries}
+     *
+     * Return a generator yielding `[key, value]` pairs,
+     * in order from least recently used to most recently used.
+     */
+    rentries(): Generator<(K | V | BackgroundFetch<V> | undefined)[], void, unknown>;
+    /**
+     * Return a generator yielding the keys in the cache,
+     * in order from most recently used to least recently used.
+     */
+    keys(): Generator<K, void, unknown>;
+    /**
+     * Inverse order version of {@link LRUCache.keys}
+     *
+     * Return a generator yielding the keys in the cache,
+     * in order from least recently used to most recently used.
+     */
+    rkeys(): Generator<K, void, unknown>;
+    /**
+     * Return a generator yielding the values in the cache,
+     * in order from most recently used to least recently used.
+     */
+    values(): Generator<V, void, unknown>;
+    /**
+     * Inverse order version of {@link LRUCache.values}
+     *
+     * Return a generator yielding the values in the cache,
+     * in order from least recently used to most recently used.
+     */
+    rvalues(): Generator<V | BackgroundFetch<V> | undefined, void, unknown>;
+    /**
+     * Iterating over the cache itself yields the same results as
+     * {@link LRUCache.entries}
+     */
+    [Symbol.iterator](): Generator<[K, V], void, unknown>;
+    /**
+     * A String value that is used in the creation of the default string
+     * description of an object. Called by the built-in method
+     * `Object.prototype.toString`.
+     */
+    [Symbol.toStringTag]: string;
+    /**
+     * Find a value for which the supplied fn method returns a truthy value,
+     * similar to `Array.find()`. fn is called as `fn(value, key, cache)`.
+     */
+    find(fn: (v: V, k: K, self: LRUCache<K, V, FC>) => boolean, getOptions?: LRUCache.GetOptions<K, V, FC>): V | undefined;
+    /**
+     * Call the supplied function on each item in the cache, in order from most
+     * recently used to least recently used.
+     *
+     * `fn` is called as `fn(value, key, cache)`.
+     *
+     * If `thisp` is provided, function will be called in the `this`-context of
+     * the provided object, or the cache if no `thisp` object is provided.
+     *
+     * Does not update age or recenty of use, or iterate over stale values.
+     */
+    forEach(fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any, thisp?: any): void;
+    /**
+     * The same as {@link LRUCache.forEach} but items are iterated over in
+     * reverse order.  (ie, less recently used items are iterated over first.)
+     */
+    rforEach(fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any, thisp?: any): void;
+    /**
+     * Delete any stale entries. Returns true if anything was removed,
+     * false otherwise.
+     */
+    purgeStale(): boolean;
+    /**
+     * Get the extended info about a given entry, to get its value, size, and
+     * TTL info simultaneously. Returns `undefined` if the key is not present.
+     *
+     * Unlike {@link LRUCache#dump}, which is designed to be portable and survive
+     * serialization, the `start` value is always the current timestamp, and the
+     * `ttl` is a calculated remaining time to live (negative if expired).
+     *
+     * Always returns stale values, if their info is found in the cache, so be
+     * sure to check for expirations (ie, a negative {@link LRUCache.Entry#ttl})
+     * if relevant.
+     */
+    info(key: K): LRUCache.Entry<V> | undefined;
+    /**
+     * Return an array of [key, {@link LRUCache.Entry}] tuples which can be
+     * passed to {@link LRLUCache#load}.
+     *
+     * The `start` fields are calculated relative to a portable `Date.now()`
+     * timestamp, even if `performance.now()` is available.
+     *
+     * Stale entries are always included in the `dump`, even if
+     * {@link LRUCache.OptionsBase.allowStale} is false.
+     *
+     * Note: this returns an actual array, not a generator, so it can be more
+     * easily passed around.
+     */
+    dump(): [K, LRUCache.Entry<V>][];
+    /**
+     * Reset the cache and load in the items in entries in the order listed.
+     *
+     * The shape of the resulting cache may be different if the same options are
+     * not used in both caches.
+     *
+     * The `start` fields are assumed to be calculated relative to a portable
+     * `Date.now()` timestamp, even if `performance.now()` is available.
+     */
+    load(arr: [K, LRUCache.Entry<V>][]): void;
+    /**
+     * Add a value to the cache.
+     *
+     * Note: if `undefined` is specified as a value, this is an alias for
+     * {@link LRUCache#delete}
+     *
+     * Fields on the {@link LRUCache.SetOptions} options param will override
+     * their corresponding values in the constructor options for the scope
+     * of this single `set()` operation.
+     *
+     * If `start` is provided, then that will set the effective start
+     * time for the TTL calculation. Note that this must be a previous
+     * value of `performance.now()` if supported, or a previous value of
+     * `Date.now()` if not.
+     *
+     * Options object may also include `size`, which will prevent
+     * calling the `sizeCalculation` function and just use the specified
+     * number if it is a positive integer, and `noDisposeOnSet` which
+     * will prevent calling a `dispose` function in the case of
+     * overwrites.
+     *
+     * If the `size` (or return value of `sizeCalculation`) for a given
+     * entry is greater than `maxEntrySize`, then the item will not be
+     * added to the cache.
+     *
+     * Will update the recency of the entry.
+     *
+     * If the value is `undefined`, then this is an alias for
+     * `cache.delete(key)`. `undefined` is never stored in the cache.
+     */
+    set(k: K, v: V | BackgroundFetch<V> | undefined, setOptions?: LRUCache.SetOptions<K, V, FC>): this;
+    /**
+     * Evict the least recently used item, returning its value or
+     * `undefined` if cache is empty.
+     */
+    pop(): V | undefined;
+    /**
+     * Check if a key is in the cache, without updating the recency of use.
+     * Will return false if the item is stale, even though it is technically
+     * in the cache.
+     *
+     * Check if a key is in the cache, without updating the recency of
+     * use. Age is updated if {@link LRUCache.OptionsBase.updateAgeOnHas} is set
+     * to `true` in either the options or the constructor.
+     *
+     * Will return `false` if the item is stale, even though it is technically in
+     * the cache. The difference can be determined (if it matters) by using a
+     * `status` argument, and inspecting the `has` field.
+     *
+     * Will not update item age unless
+     * {@link LRUCache.OptionsBase.updateAgeOnHas} is set.
+     */
+    has(k: K, hasOptions?: LRUCache.HasOptions<K, V, FC>): boolean;
+    /**
+     * Like {@link LRUCache#get} but doesn't update recency or delete stale
+     * items.
+     *
+     * Returns `undefined` if the item is stale, unless
+     * {@link LRUCache.OptionsBase.allowStale} is set.
+     */
+    peek(k: K, peekOptions?: LRUCache.PeekOptions<K, V, FC>): V | undefined;
+    /**
+     * Make an asynchronous cached fetch using the
+     * {@link LRUCache.OptionsBase.fetchMethod} function.
+     *
+     * If the value is in the cache and not stale, then the returned
+     * Promise resolves to the value.
+     *
+     * If not in the cache, or beyond its TTL staleness, then
+     * `fetchMethod(key, staleValue, { options, signal, context })` is
+     * called, and the value returned will be added to the cache once
+     * resolved.
+     *
+     * If called with `allowStale`, and an asynchronous fetch is
+     * currently in progress to reload a stale value, then the former
+     * stale value will be returned.
+     *
+     * If called with `forceRefresh`, then the cached item will be
+     * re-fetched, even if it is not stale. However, if `allowStale` is also
+     * set, then the old value will still be returned. This is useful
+     * in cases where you want to force a reload of a cached value. If
+     * a background fetch is already in progress, then `forceRefresh`
+     * has no effect.
+     *
+     * If multiple fetches for the same key are issued, then they will all be
+     * coalesced into a single call to fetchMethod.
+     *
+     * Note that this means that handling options such as
+     * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort},
+     * {@link LRUCache.FetchOptions.signal},
+     * and {@link LRUCache.OptionsBase.allowStaleOnFetchRejection} will be
+     * determined by the FIRST fetch() call for a given key.
+     *
+     * This is a known (fixable) shortcoming which will be addresed on when
+     * someone complains about it, as the fix would involve added complexity and
+     * may not be worth the costs for this edge case.
+     *
+     * If {@link LRUCache.OptionsBase.fetchMethod} is not specified, then this is
+     * effectively an alias for `Promise.resolve(cache.get(key))`.
+     *
+     * When the fetch method resolves to a value, if the fetch has not
+     * been aborted due to deletion, eviction, or being overwritten,
+     * then it is added to the cache using the options provided.
+     *
+     * If the key is evicted or deleted before the `fetchMethod`
+     * resolves, then the AbortSignal passed to the `fetchMethod` will
+     * receive an `abort` event, and the promise returned by `fetch()`
+     * will reject with the reason for the abort.
+     *
+     * If a `signal` is passed to the `fetch()` call, then aborting the
+     * signal will abort the fetch and cause the `fetch()` promise to
+     * reject with the reason provided.
+     *
+     * **Setting `context`**
+     *
+     * If an `FC` type is set to a type other than `unknown`, `void`, or
+     * `undefined` in the {@link LRUCache} constructor, then all
+     * calls to `cache.fetch()` _must_ provide a `context` option. If
+     * set to `undefined` or `void`, then calls to fetch _must not_
+     * provide a `context` option.
+     *
+     * The `context` param allows you to provide arbitrary data that
+     * might be relevant in the course of fetching the data. It is only
+     * relevant for the course of a single `fetch()` operation, and
+     * discarded afterwards.
+     *
+     * **Note: `fetch()` calls are inflight-unique**
+     *
+     * If you call `fetch()` multiple times with the same key value,
+     * then every call after the first will resolve on the same
+     * promise<sup>1</sup>,
+     * _even if they have different settings that would otherwise change
+     * the behavior of the fetch_, such as `noDeleteOnFetchRejection`
+     * or `ignoreFetchAbort`.
+     *
+     * In most cases, this is not a problem (in fact, only fetching
+     * something once is what you probably want, if you're caching in
+     * the first place). If you are changing the fetch() options
+     * dramatically between runs, there's a good chance that you might
+     * be trying to fit divergent semantics into a single object, and
+     * would be better off with multiple cache instances.
+     *
+     * **1**: Ie, they're not the "same Promise", but they resolve at
+     * the same time, because they're both waiting on the same
+     * underlying fetchMethod response.
+     */
+    fetch(k: K, fetchOptions: unknown extends FC ? LRUCache.FetchOptions<K, V, FC> : FC extends undefined | void ? LRUCache.FetchOptionsNoContext<K, V> : LRUCache.FetchOptionsWithContext<K, V, FC>): Promise<undefined | V>;
+    fetch(k: unknown extends FC ? K : FC extends undefined | void ? K : never, fetchOptions?: unknown extends FC ? LRUCache.FetchOptions<K, V, FC> : FC extends undefined | void ? LRUCache.FetchOptionsNoContext<K, V> : never): Promise<undefined | V>;
+    /**
+     * In some cases, `cache.fetch()` may resolve to `undefined`, either because
+     * a {@link LRUCache.OptionsBase#fetchMethod} was not provided (turning
+     * `cache.fetch(k)` into just an async wrapper around `cache.get(k)`) or
+     * because `ignoreFetchAbort` was specified (either to the constructor or
+     * in the {@link LRUCache.FetchOptions}). Also, the
+     * {@link OptionsBase.fetchMethod} may return `undefined` or `void`, making
+     * the test even more complicated.
+     *
+     * Because inferring the cases where `undefined` might be returned are so
+     * cumbersome, but testing for `undefined` can also be annoying, this method
+     * can be used, which will reject if `this.fetch()` resolves to undefined.
+     */
+    forceFetch(k: K, fetchOptions: unknown extends FC ? LRUCache.FetchOptions<K, V, FC> : FC extends undefined | void ? LRUCache.FetchOptionsNoContext<K, V> : LRUCache.FetchOptionsWithContext<K, V, FC>): Promise<V>;
+    forceFetch(k: unknown extends FC ? K : FC extends undefined | void ? K : never, fetchOptions?: unknown extends FC ? LRUCache.FetchOptions<K, V, FC> : FC extends undefined | void ? LRUCache.FetchOptionsNoContext<K, V> : never): Promise<V>;
+    /**
+     * If the key is found in the cache, then this is equivalent to
+     * {@link LRUCache#get}. If not, in the cache, then calculate the value using
+     * the {@link LRUCache.OptionsBase.memoMethod}, and add it to the cache.
+     *
+     * If an `FC` type is set to a type other than `unknown`, `void`, or
+     * `undefined` in the LRUCache constructor, then all calls to `cache.memo()`
+     * _must_ provide a `context` option. If set to `undefined` or `void`, then
+     * calls to memo _must not_ provide a `context` option.
+     *
+     * The `context` param allows you to provide arbitrary data that might be
+     * relevant in the course of fetching the data. It is only relevant for the
+     * course of a single `memo()` operation, and discarded afterwards.
+     */
+    memo(k: K, memoOptions: unknown extends FC ? LRUCache.MemoOptions<K, V, FC> : FC extends undefined | void ? LRUCache.MemoOptionsNoContext<K, V> : LRUCache.MemoOptionsWithContext<K, V, FC>): V;
+    memo(k: unknown extends FC ? K : FC extends undefined | void ? K : never, memoOptions?: unknown extends FC ? LRUCache.MemoOptions<K, V, FC> : FC extends undefined | void ? LRUCache.MemoOptionsNoContext<K, V> : never): V;
+    /**
+     * Return a value from the cache. Will update the recency of the cache
+     * entry found.
+     *
+     * If the key is not found, get() will return `undefined`.
+     */
+    get(k: K, getOptions?: LRUCache.GetOptions<K, V, FC>): V | undefined;
+    /**
+     * Deletes a key out of the cache.
+     *
+     * Returns true if the key was deleted, false otherwise.
+     */
+    delete(k: K): boolean;
+    /**
+     * Clear the cache entirely, throwing away all values.
+     */
+    clear(): void;
+}
+//# sourceMappingURL=index.d.ts.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/lru-cache/dist/esm/index.d.ts.map b/mqtt-backend/node_modules/lru-cache/dist/esm/index.d.ts.map
new file mode 100644
index 0000000..34d60c5
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/esm/index.d.ts.map
@@ -0,0 +1 @@
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\ No newline at end of file
diff --git a/mqtt-backend/node_modules/lru-cache/dist/esm/index.js b/mqtt-backend/node_modules/lru-cache/dist/esm/index.js
new file mode 100644
index 0000000..555654a
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/esm/index.js
@@ -0,0 +1,1542 @@
+/**
+ * @module LRUCache
+ */
+const perf = typeof performance === 'object' &&
+    performance &&
+    typeof performance.now === 'function'
+    ? performance
+    : Date;
+const warned = new Set();
+/* c8 ignore start */
+const PROCESS = (typeof process === 'object' && !!process ? process : {});
+/* c8 ignore start */
+const emitWarning = (msg, type, code, fn) => {
+    typeof PROCESS.emitWarning === 'function'
+        ? PROCESS.emitWarning(msg, type, code, fn)
+        : console.error(`[${code}] ${type}: ${msg}`);
+};
+let AC = globalThis.AbortController;
+let AS = globalThis.AbortSignal;
+/* c8 ignore start */
+if (typeof AC === 'undefined') {
+    //@ts-ignore
+    AS = class AbortSignal {
+        onabort;
+        _onabort = [];
+        reason;
+        aborted = false;
+        addEventListener(_, fn) {
+            this._onabort.push(fn);
+        }
+    };
+    //@ts-ignore
+    AC = class AbortController {
+        constructor() {
+            warnACPolyfill();
+        }
+        signal = new AS();
+        abort(reason) {
+            if (this.signal.aborted)
+                return;
+            //@ts-ignore
+            this.signal.reason = reason;
+            //@ts-ignore
+            this.signal.aborted = true;
+            //@ts-ignore
+            for (const fn of this.signal._onabort) {
+                fn(reason);
+            }
+            this.signal.onabort?.(reason);
+        }
+    };
+    let printACPolyfillWarning = PROCESS.env?.LRU_CACHE_IGNORE_AC_WARNING !== '1';
+    const warnACPolyfill = () => {
+        if (!printACPolyfillWarning)
+            return;
+        printACPolyfillWarning = false;
+        emitWarning('AbortController is not defined. If using lru-cache in ' +
+            'node 14, load an AbortController polyfill from the ' +
+            '`node-abort-controller` package. A minimal polyfill is ' +
+            'provided for use by LRUCache.fetch(), but it should not be ' +
+            'relied upon in other contexts (eg, passing it to other APIs that ' +
+            'use AbortController/AbortSignal might have undesirable effects). ' +
+            'You may disable this with LRU_CACHE_IGNORE_AC_WARNING=1 in the env.', 'NO_ABORT_CONTROLLER', 'ENOTSUP', warnACPolyfill);
+    };
+}
+/* c8 ignore stop */
+const shouldWarn = (code) => !warned.has(code);
+const TYPE = Symbol('type');
+const isPosInt = (n) => n && n === Math.floor(n) && n > 0 && isFinite(n);
+/* c8 ignore start */
+// This is a little bit ridiculous, tbh.
+// The maximum array length is 2^32-1 or thereabouts on most JS impls.
+// And well before that point, you're caching the entire world, I mean,
+// that's ~32GB of just integers for the next/prev links, plus whatever
+// else to hold that many keys and values.  Just filling the memory with
+// zeroes at init time is brutal when you get that big.
+// But why not be complete?
+// Maybe in the future, these limits will have expanded.
+const getUintArray = (max) => !isPosInt(max)
+    ? null
+    : max <= Math.pow(2, 8)
+        ? Uint8Array
+        : max <= Math.pow(2, 16)
+            ? Uint16Array
+            : max <= Math.pow(2, 32)
+                ? Uint32Array
+                : max <= Number.MAX_SAFE_INTEGER
+                    ? ZeroArray
+                    : null;
+/* c8 ignore stop */
+class ZeroArray extends Array {
+    constructor(size) {
+        super(size);
+        this.fill(0);
+    }
+}
+class Stack {
+    heap;
+    length;
+    // private constructor
+    static #constructing = false;
+    static create(max) {
+        const HeapCls = getUintArray(max);
+        if (!HeapCls)
+            return [];
+        Stack.#constructing = true;
+        const s = new Stack(max, HeapCls);
+        Stack.#constructing = false;
+        return s;
+    }
+    constructor(max, HeapCls) {
+        /* c8 ignore start */
+        if (!Stack.#constructing) {
+            throw new TypeError('instantiate Stack using Stack.create(n)');
+        }
+        /* c8 ignore stop */
+        this.heap = new HeapCls(max);
+        this.length = 0;
+    }
+    push(n) {
+        this.heap[this.length++] = n;
+    }
+    pop() {
+        return this.heap[--this.length];
+    }
+}
+/**
+ * Default export, the thing you're using this module to get.
+ *
+ * The `K` and `V` types define the key and value types, respectively. The
+ * optional `FC` type defines the type of the `context` object passed to
+ * `cache.fetch()` and `cache.memo()`.
+ *
+ * Keys and values **must not** be `null` or `undefined`.
+ *
+ * All properties from the options object (with the exception of `max`,
+ * `maxSize`, `fetchMethod`, `memoMethod`, `dispose` and `disposeAfter`) are
+ * added as normal public members. (The listed options are read-only getters.)
+ *
+ * Changing any of these will alter the defaults for subsequent method calls.
+ */
+export class LRUCache {
+    // options that cannot be changed without disaster
+    #max;
+    #maxSize;
+    #dispose;
+    #disposeAfter;
+    #fetchMethod;
+    #memoMethod;
+    /**
+     * {@link LRUCache.OptionsBase.ttl}
+     */
+    ttl;
+    /**
+     * {@link LRUCache.OptionsBase.ttlResolution}
+     */
+    ttlResolution;
+    /**
+     * {@link LRUCache.OptionsBase.ttlAutopurge}
+     */
+    ttlAutopurge;
+    /**
+     * {@link LRUCache.OptionsBase.updateAgeOnGet}
+     */
+    updateAgeOnGet;
+    /**
+     * {@link LRUCache.OptionsBase.updateAgeOnHas}
+     */
+    updateAgeOnHas;
+    /**
+     * {@link LRUCache.OptionsBase.allowStale}
+     */
+    allowStale;
+    /**
+     * {@link LRUCache.OptionsBase.noDisposeOnSet}
+     */
+    noDisposeOnSet;
+    /**
+     * {@link LRUCache.OptionsBase.noUpdateTTL}
+     */
+    noUpdateTTL;
+    /**
+     * {@link LRUCache.OptionsBase.maxEntrySize}
+     */
+    maxEntrySize;
+    /**
+     * {@link LRUCache.OptionsBase.sizeCalculation}
+     */
+    sizeCalculation;
+    /**
+     * {@link LRUCache.OptionsBase.noDeleteOnFetchRejection}
+     */
+    noDeleteOnFetchRejection;
+    /**
+     * {@link LRUCache.OptionsBase.noDeleteOnStaleGet}
+     */
+    noDeleteOnStaleGet;
+    /**
+     * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort}
+     */
+    allowStaleOnFetchAbort;
+    /**
+     * {@link LRUCache.OptionsBase.allowStaleOnFetchRejection}
+     */
+    allowStaleOnFetchRejection;
+    /**
+     * {@link LRUCache.OptionsBase.ignoreFetchAbort}
+     */
+    ignoreFetchAbort;
+    // computed properties
+    #size;
+    #calculatedSize;
+    #keyMap;
+    #keyList;
+    #valList;
+    #next;
+    #prev;
+    #head;
+    #tail;
+    #free;
+    #disposed;
+    #sizes;
+    #starts;
+    #ttls;
+    #hasDispose;
+    #hasFetchMethod;
+    #hasDisposeAfter;
+    /**
+     * Do not call this method unless you need to inspect the
+     * inner workings of the cache.  If anything returned by this
+     * object is modified in any way, strange breakage may occur.
+     *
+     * These fields are private for a reason!
+     *
+     * @internal
+     */
+    static unsafeExposeInternals(c) {
+        return {
+            // properties
+            starts: c.#starts,
+            ttls: c.#ttls,
+            sizes: c.#sizes,
+            keyMap: c.#keyMap,
+            keyList: c.#keyList,
+            valList: c.#valList,
+            next: c.#next,
+            prev: c.#prev,
+            get head() {
+                return c.#head;
+            },
+            get tail() {
+                return c.#tail;
+            },
+            free: c.#free,
+            // methods
+            isBackgroundFetch: (p) => c.#isBackgroundFetch(p),
+            backgroundFetch: (k, index, options, context) => c.#backgroundFetch(k, index, options, context),
+            moveToTail: (index) => c.#moveToTail(index),
+            indexes: (options) => c.#indexes(options),
+            rindexes: (options) => c.#rindexes(options),
+            isStale: (index) => c.#isStale(index),
+        };
+    }
+    // Protected read-only members
+    /**
+     * {@link LRUCache.OptionsBase.max} (read-only)
+     */
+    get max() {
+        return this.#max;
+    }
+    /**
+     * {@link LRUCache.OptionsBase.maxSize} (read-only)
+     */
+    get maxSize() {
+        return this.#maxSize;
+    }
+    /**
+     * The total computed size of items in the cache (read-only)
+     */
+    get calculatedSize() {
+        return this.#calculatedSize;
+    }
+    /**
+     * The number of items stored in the cache (read-only)
+     */
+    get size() {
+        return this.#size;
+    }
+    /**
+     * {@link LRUCache.OptionsBase.fetchMethod} (read-only)
+     */
+    get fetchMethod() {
+        return this.#fetchMethod;
+    }
+    get memoMethod() {
+        return this.#memoMethod;
+    }
+    /**
+     * {@link LRUCache.OptionsBase.dispose} (read-only)
+     */
+    get dispose() {
+        return this.#dispose;
+    }
+    /**
+     * {@link LRUCache.OptionsBase.disposeAfter} (read-only)
+     */
+    get disposeAfter() {
+        return this.#disposeAfter;
+    }
+    constructor(options) {
+        const { max = 0, ttl, ttlResolution = 1, ttlAutopurge, updateAgeOnGet, updateAgeOnHas, allowStale, dispose, disposeAfter, noDisposeOnSet, noUpdateTTL, maxSize = 0, maxEntrySize = 0, sizeCalculation, fetchMethod, memoMethod, noDeleteOnFetchRejection, noDeleteOnStaleGet, allowStaleOnFetchRejection, allowStaleOnFetchAbort, ignoreFetchAbort, } = options;
+        if (max !== 0 && !isPosInt(max)) {
+            throw new TypeError('max option must be a nonnegative integer');
+        }
+        const UintArray = max ? getUintArray(max) : Array;
+        if (!UintArray) {
+            throw new Error('invalid max value: ' + max);
+        }
+        this.#max = max;
+        this.#maxSize = maxSize;
+        this.maxEntrySize = maxEntrySize || this.#maxSize;
+        this.sizeCalculation = sizeCalculation;
+        if (this.sizeCalculation) {
+            if (!this.#maxSize && !this.maxEntrySize) {
+                throw new TypeError('cannot set sizeCalculation without setting maxSize or maxEntrySize');
+            }
+            if (typeof this.sizeCalculation !== 'function') {
+                throw new TypeError('sizeCalculation set to non-function');
+            }
+        }
+        if (memoMethod !== undefined &&
+            typeof memoMethod !== 'function') {
+            throw new TypeError('memoMethod must be a function if defined');
+        }
+        this.#memoMethod = memoMethod;
+        if (fetchMethod !== undefined &&
+            typeof fetchMethod !== 'function') {
+            throw new TypeError('fetchMethod must be a function if specified');
+        }
+        this.#fetchMethod = fetchMethod;
+        this.#hasFetchMethod = !!fetchMethod;
+        this.#keyMap = new Map();
+        this.#keyList = new Array(max).fill(undefined);
+        this.#valList = new Array(max).fill(undefined);
+        this.#next = new UintArray(max);
+        this.#prev = new UintArray(max);
+        this.#head = 0;
+        this.#tail = 0;
+        this.#free = Stack.create(max);
+        this.#size = 0;
+        this.#calculatedSize = 0;
+        if (typeof dispose === 'function') {
+            this.#dispose = dispose;
+        }
+        if (typeof disposeAfter === 'function') {
+            this.#disposeAfter = disposeAfter;
+            this.#disposed = [];
+        }
+        else {
+            this.#disposeAfter = undefined;
+            this.#disposed = undefined;
+        }
+        this.#hasDispose = !!this.#dispose;
+        this.#hasDisposeAfter = !!this.#disposeAfter;
+        this.noDisposeOnSet = !!noDisposeOnSet;
+        this.noUpdateTTL = !!noUpdateTTL;
+        this.noDeleteOnFetchRejection = !!noDeleteOnFetchRejection;
+        this.allowStaleOnFetchRejection = !!allowStaleOnFetchRejection;
+        this.allowStaleOnFetchAbort = !!allowStaleOnFetchAbort;
+        this.ignoreFetchAbort = !!ignoreFetchAbort;
+        // NB: maxEntrySize is set to maxSize if it's set
+        if (this.maxEntrySize !== 0) {
+            if (this.#maxSize !== 0) {
+                if (!isPosInt(this.#maxSize)) {
+                    throw new TypeError('maxSize must be a positive integer if specified');
+                }
+            }
+            if (!isPosInt(this.maxEntrySize)) {
+                throw new TypeError('maxEntrySize must be a positive integer if specified');
+            }
+            this.#initializeSizeTracking();
+        }
+        this.allowStale = !!allowStale;
+        this.noDeleteOnStaleGet = !!noDeleteOnStaleGet;
+        this.updateAgeOnGet = !!updateAgeOnGet;
+        this.updateAgeOnHas = !!updateAgeOnHas;
+        this.ttlResolution =
+            isPosInt(ttlResolution) || ttlResolution === 0
+                ? ttlResolution
+                : 1;
+        this.ttlAutopurge = !!ttlAutopurge;
+        this.ttl = ttl || 0;
+        if (this.ttl) {
+            if (!isPosInt(this.ttl)) {
+                throw new TypeError('ttl must be a positive integer if specified');
+            }
+            this.#initializeTTLTracking();
+        }
+        // do not allow completely unbounded caches
+        if (this.#max === 0 && this.ttl === 0 && this.#maxSize === 0) {
+            throw new TypeError('At least one of max, maxSize, or ttl is required');
+        }
+        if (!this.ttlAutopurge && !this.#max && !this.#maxSize) {
+            const code = 'LRU_CACHE_UNBOUNDED';
+            if (shouldWarn(code)) {
+                warned.add(code);
+                const msg = 'TTL caching without ttlAutopurge, max, or maxSize can ' +
+                    'result in unbounded memory consumption.';
+                emitWarning(msg, 'UnboundedCacheWarning', code, LRUCache);
+            }
+        }
+    }
+    /**
+     * Return the number of ms left in the item's TTL. If item is not in cache,
+     * returns `0`. Returns `Infinity` if item is in cache without a defined TTL.
+     */
+    getRemainingTTL(key) {
+        return this.#keyMap.has(key) ? Infinity : 0;
+    }
+    #initializeTTLTracking() {
+        const ttls = new ZeroArray(this.#max);
+        const starts = new ZeroArray(this.#max);
+        this.#ttls = ttls;
+        this.#starts = starts;
+        this.#setItemTTL = (index, ttl, start = perf.now()) => {
+            starts[index] = ttl !== 0 ? start : 0;
+            ttls[index] = ttl;
+            if (ttl !== 0 && this.ttlAutopurge) {
+                const t = setTimeout(() => {
+                    if (this.#isStale(index)) {
+                        this.#delete(this.#keyList[index], 'expire');
+                    }
+                }, ttl + 1);
+                // unref() not supported on all platforms
+                /* c8 ignore start */
+                if (t.unref) {
+                    t.unref();
+                }
+                /* c8 ignore stop */
+            }
+        };
+        this.#updateItemAge = index => {
+            starts[index] = ttls[index] !== 0 ? perf.now() : 0;
+        };
+        this.#statusTTL = (status, index) => {
+            if (ttls[index]) {
+                const ttl = ttls[index];
+                const start = starts[index];
+                /* c8 ignore next */
+                if (!ttl || !start)
+                    return;
+                status.ttl = ttl;
+                status.start = start;
+                status.now = cachedNow || getNow();
+                const age = status.now - start;
+                status.remainingTTL = ttl - age;
+            }
+        };
+        // debounce calls to perf.now() to 1s so we're not hitting
+        // that costly call repeatedly.
+        let cachedNow = 0;
+        const getNow = () => {
+            const n = perf.now();
+            if (this.ttlResolution > 0) {
+                cachedNow = n;
+                const t = setTimeout(() => (cachedNow = 0), this.ttlResolution);
+                // not available on all platforms
+                /* c8 ignore start */
+                if (t.unref) {
+                    t.unref();
+                }
+                /* c8 ignore stop */
+            }
+            return n;
+        };
+        this.getRemainingTTL = key => {
+            const index = this.#keyMap.get(key);
+            if (index === undefined) {
+                return 0;
+            }
+            const ttl = ttls[index];
+            const start = starts[index];
+            if (!ttl || !start) {
+                return Infinity;
+            }
+            const age = (cachedNow || getNow()) - start;
+            return ttl - age;
+        };
+        this.#isStale = index => {
+            const s = starts[index];
+            const t = ttls[index];
+            return !!t && !!s && (cachedNow || getNow()) - s > t;
+        };
+    }
+    // conditionally set private methods related to TTL
+    #updateItemAge = () => { };
+    #statusTTL = () => { };
+    #setItemTTL = () => { };
+    /* c8 ignore stop */
+    #isStale = () => false;
+    #initializeSizeTracking() {
+        const sizes = new ZeroArray(this.#max);
+        this.#calculatedSize = 0;
+        this.#sizes = sizes;
+        this.#removeItemSize = index => {
+            this.#calculatedSize -= sizes[index];
+            sizes[index] = 0;
+        };
+        this.#requireSize = (k, v, size, sizeCalculation) => {
+            // provisionally accept background fetches.
+            // actual value size will be checked when they return.
+            if (this.#isBackgroundFetch(v)) {
+                return 0;
+            }
+            if (!isPosInt(size)) {
+                if (sizeCalculation) {
+                    if (typeof sizeCalculation !== 'function') {
+                        throw new TypeError('sizeCalculation must be a function');
+                    }
+                    size = sizeCalculation(v, k);
+                    if (!isPosInt(size)) {
+                        throw new TypeError('sizeCalculation return invalid (expect positive integer)');
+                    }
+                }
+                else {
+                    throw new TypeError('invalid size value (must be positive integer). ' +
+                        'When maxSize or maxEntrySize is used, sizeCalculation ' +
+                        'or size must be set.');
+                }
+            }
+            return size;
+        };
+        this.#addItemSize = (index, size, status) => {
+            sizes[index] = size;
+            if (this.#maxSize) {
+                const maxSize = this.#maxSize - sizes[index];
+                while (this.#calculatedSize > maxSize) {
+                    this.#evict(true);
+                }
+            }
+            this.#calculatedSize += sizes[index];
+            if (status) {
+                status.entrySize = size;
+                status.totalCalculatedSize = this.#calculatedSize;
+            }
+        };
+    }
+    #removeItemSize = _i => { };
+    #addItemSize = (_i, _s, _st) => { };
+    #requireSize = (_k, _v, size, sizeCalculation) => {
+        if (size || sizeCalculation) {
+            throw new TypeError('cannot set size without setting maxSize or maxEntrySize on cache');
+        }
+        return 0;
+    };
+    *#indexes({ allowStale = this.allowStale } = {}) {
+        if (this.#size) {
+            for (let i = this.#tail; true;) {
+                if (!this.#isValidIndex(i)) {
+                    break;
+                }
+                if (allowStale || !this.#isStale(i)) {
+                    yield i;
+                }
+                if (i === this.#head) {
+                    break;
+                }
+                else {
+                    i = this.#prev[i];
+                }
+            }
+        }
+    }
+    *#rindexes({ allowStale = this.allowStale } = {}) {
+        if (this.#size) {
+            for (let i = this.#head; true;) {
+                if (!this.#isValidIndex(i)) {
+                    break;
+                }
+                if (allowStale || !this.#isStale(i)) {
+                    yield i;
+                }
+                if (i === this.#tail) {
+                    break;
+                }
+                else {
+                    i = this.#next[i];
+                }
+            }
+        }
+    }
+    #isValidIndex(index) {
+        return (index !== undefined &&
+            this.#keyMap.get(this.#keyList[index]) === index);
+    }
+    /**
+     * Return a generator yielding `[key, value]` pairs,
+     * in order from most recently used to least recently used.
+     */
+    *entries() {
+        for (const i of this.#indexes()) {
+            if (this.#valList[i] !== undefined &&
+                this.#keyList[i] !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield [this.#keyList[i], this.#valList[i]];
+            }
+        }
+    }
+    /**
+     * Inverse order version of {@link LRUCache.entries}
+     *
+     * Return a generator yielding `[key, value]` pairs,
+     * in order from least recently used to most recently used.
+     */
+    *rentries() {
+        for (const i of this.#rindexes()) {
+            if (this.#valList[i] !== undefined &&
+                this.#keyList[i] !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield [this.#keyList[i], this.#valList[i]];
+            }
+        }
+    }
+    /**
+     * Return a generator yielding the keys in the cache,
+     * in order from most recently used to least recently used.
+     */
+    *keys() {
+        for (const i of this.#indexes()) {
+            const k = this.#keyList[i];
+            if (k !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield k;
+            }
+        }
+    }
+    /**
+     * Inverse order version of {@link LRUCache.keys}
+     *
+     * Return a generator yielding the keys in the cache,
+     * in order from least recently used to most recently used.
+     */
+    *rkeys() {
+        for (const i of this.#rindexes()) {
+            const k = this.#keyList[i];
+            if (k !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield k;
+            }
+        }
+    }
+    /**
+     * Return a generator yielding the values in the cache,
+     * in order from most recently used to least recently used.
+     */
+    *values() {
+        for (const i of this.#indexes()) {
+            const v = this.#valList[i];
+            if (v !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield this.#valList[i];
+            }
+        }
+    }
+    /**
+     * Inverse order version of {@link LRUCache.values}
+     *
+     * Return a generator yielding the values in the cache,
+     * in order from least recently used to most recently used.
+     */
+    *rvalues() {
+        for (const i of this.#rindexes()) {
+            const v = this.#valList[i];
+            if (v !== undefined &&
+                !this.#isBackgroundFetch(this.#valList[i])) {
+                yield this.#valList[i];
+            }
+        }
+    }
+    /**
+     * Iterating over the cache itself yields the same results as
+     * {@link LRUCache.entries}
+     */
+    [Symbol.iterator]() {
+        return this.entries();
+    }
+    /**
+     * A String value that is used in the creation of the default string
+     * description of an object. Called by the built-in method
+     * `Object.prototype.toString`.
+     */
+    [Symbol.toStringTag] = 'LRUCache';
+    /**
+     * Find a value for which the supplied fn method returns a truthy value,
+     * similar to `Array.find()`. fn is called as `fn(value, key, cache)`.
+     */
+    find(fn, getOptions = {}) {
+        for (const i of this.#indexes()) {
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v)
+                ? v.__staleWhileFetching
+                : v;
+            if (value === undefined)
+                continue;
+            if (fn(value, this.#keyList[i], this)) {
+                return this.get(this.#keyList[i], getOptions);
+            }
+        }
+    }
+    /**
+     * Call the supplied function on each item in the cache, in order from most
+     * recently used to least recently used.
+     *
+     * `fn` is called as `fn(value, key, cache)`.
+     *
+     * If `thisp` is provided, function will be called in the `this`-context of
+     * the provided object, or the cache if no `thisp` object is provided.
+     *
+     * Does not update age or recenty of use, or iterate over stale values.
+     */
+    forEach(fn, thisp = this) {
+        for (const i of this.#indexes()) {
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v)
+                ? v.__staleWhileFetching
+                : v;
+            if (value === undefined)
+                continue;
+            fn.call(thisp, value, this.#keyList[i], this);
+        }
+    }
+    /**
+     * The same as {@link LRUCache.forEach} but items are iterated over in
+     * reverse order.  (ie, less recently used items are iterated over first.)
+     */
+    rforEach(fn, thisp = this) {
+        for (const i of this.#rindexes()) {
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v)
+                ? v.__staleWhileFetching
+                : v;
+            if (value === undefined)
+                continue;
+            fn.call(thisp, value, this.#keyList[i], this);
+        }
+    }
+    /**
+     * Delete any stale entries. Returns true if anything was removed,
+     * false otherwise.
+     */
+    purgeStale() {
+        let deleted = false;
+        for (const i of this.#rindexes({ allowStale: true })) {
+            if (this.#isStale(i)) {
+                this.#delete(this.#keyList[i], 'expire');
+                deleted = true;
+            }
+        }
+        return deleted;
+    }
+    /**
+     * Get the extended info about a given entry, to get its value, size, and
+     * TTL info simultaneously. Returns `undefined` if the key is not present.
+     *
+     * Unlike {@link LRUCache#dump}, which is designed to be portable and survive
+     * serialization, the `start` value is always the current timestamp, and the
+     * `ttl` is a calculated remaining time to live (negative if expired).
+     *
+     * Always returns stale values, if their info is found in the cache, so be
+     * sure to check for expirations (ie, a negative {@link LRUCache.Entry#ttl})
+     * if relevant.
+     */
+    info(key) {
+        const i = this.#keyMap.get(key);
+        if (i === undefined)
+            return undefined;
+        const v = this.#valList[i];
+        const value = this.#isBackgroundFetch(v)
+            ? v.__staleWhileFetching
+            : v;
+        if (value === undefined)
+            return undefined;
+        const entry = { value };
+        if (this.#ttls && this.#starts) {
+            const ttl = this.#ttls[i];
+            const start = this.#starts[i];
+            if (ttl && start) {
+                const remain = ttl - (perf.now() - start);
+                entry.ttl = remain;
+                entry.start = Date.now();
+            }
+        }
+        if (this.#sizes) {
+            entry.size = this.#sizes[i];
+        }
+        return entry;
+    }
+    /**
+     * Return an array of [key, {@link LRUCache.Entry}] tuples which can be
+     * passed to {@link LRLUCache#load}.
+     *
+     * The `start` fields are calculated relative to a portable `Date.now()`
+     * timestamp, even if `performance.now()` is available.
+     *
+     * Stale entries are always included in the `dump`, even if
+     * {@link LRUCache.OptionsBase.allowStale} is false.
+     *
+     * Note: this returns an actual array, not a generator, so it can be more
+     * easily passed around.
+     */
+    dump() {
+        const arr = [];
+        for (const i of this.#indexes({ allowStale: true })) {
+            const key = this.#keyList[i];
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v)
+                ? v.__staleWhileFetching
+                : v;
+            if (value === undefined || key === undefined)
+                continue;
+            const entry = { value };
+            if (this.#ttls && this.#starts) {
+                entry.ttl = this.#ttls[i];
+                // always dump the start relative to a portable timestamp
+                // it's ok for this to be a bit slow, it's a rare operation.
+                const age = perf.now() - this.#starts[i];
+                entry.start = Math.floor(Date.now() - age);
+            }
+            if (this.#sizes) {
+                entry.size = this.#sizes[i];
+            }
+            arr.unshift([key, entry]);
+        }
+        return arr;
+    }
+    /**
+     * Reset the cache and load in the items in entries in the order listed.
+     *
+     * The shape of the resulting cache may be different if the same options are
+     * not used in both caches.
+     *
+     * The `start` fields are assumed to be calculated relative to a portable
+     * `Date.now()` timestamp, even if `performance.now()` is available.
+     */
+    load(arr) {
+        this.clear();
+        for (const [key, entry] of arr) {
+            if (entry.start) {
+                // entry.start is a portable timestamp, but we may be using
+                // node's performance.now(), so calculate the offset, so that
+                // we get the intended remaining TTL, no matter how long it's
+                // been on ice.
+                //
+                // it's ok for this to be a bit slow, it's a rare operation.
+                const age = Date.now() - entry.start;
+                entry.start = perf.now() - age;
+            }
+            this.set(key, entry.value, entry);
+        }
+    }
+    /**
+     * Add a value to the cache.
+     *
+     * Note: if `undefined` is specified as a value, this is an alias for
+     * {@link LRUCache#delete}
+     *
+     * Fields on the {@link LRUCache.SetOptions} options param will override
+     * their corresponding values in the constructor options for the scope
+     * of this single `set()` operation.
+     *
+     * If `start` is provided, then that will set the effective start
+     * time for the TTL calculation. Note that this must be a previous
+     * value of `performance.now()` if supported, or a previous value of
+     * `Date.now()` if not.
+     *
+     * Options object may also include `size`, which will prevent
+     * calling the `sizeCalculation` function and just use the specified
+     * number if it is a positive integer, and `noDisposeOnSet` which
+     * will prevent calling a `dispose` function in the case of
+     * overwrites.
+     *
+     * If the `size` (or return value of `sizeCalculation`) for a given
+     * entry is greater than `maxEntrySize`, then the item will not be
+     * added to the cache.
+     *
+     * Will update the recency of the entry.
+     *
+     * If the value is `undefined`, then this is an alias for
+     * `cache.delete(key)`. `undefined` is never stored in the cache.
+     */
+    set(k, v, setOptions = {}) {
+        if (v === undefined) {
+            this.delete(k);
+            return this;
+        }
+        const { ttl = this.ttl, start, noDisposeOnSet = this.noDisposeOnSet, sizeCalculation = this.sizeCalculation, status, } = setOptions;
+        let { noUpdateTTL = this.noUpdateTTL } = setOptions;
+        const size = this.#requireSize(k, v, setOptions.size || 0, sizeCalculation);
+        // if the item doesn't fit, don't do anything
+        // NB: maxEntrySize set to maxSize by default
+        if (this.maxEntrySize && size > this.maxEntrySize) {
+            if (status) {
+                status.set = 'miss';
+                status.maxEntrySizeExceeded = true;
+            }
+            // have to delete, in case something is there already.
+            this.#delete(k, 'set');
+            return this;
+        }
+        let index = this.#size === 0 ? undefined : this.#keyMap.get(k);
+        if (index === undefined) {
+            // addition
+            index = (this.#size === 0
+                ? this.#tail
+                : this.#free.length !== 0
+                    ? this.#free.pop()
+                    : this.#size === this.#max
+                        ? this.#evict(false)
+                        : this.#size);
+            this.#keyList[index] = k;
+            this.#valList[index] = v;
+            this.#keyMap.set(k, index);
+            this.#next[this.#tail] = index;
+            this.#prev[index] = this.#tail;
+            this.#tail = index;
+            this.#size++;
+            this.#addItemSize(index, size, status);
+            if (status)
+                status.set = 'add';
+            noUpdateTTL = false;
+        }
+        else {
+            // update
+            this.#moveToTail(index);
+            const oldVal = this.#valList[index];
+            if (v !== oldVal) {
+                if (this.#hasFetchMethod && this.#isBackgroundFetch(oldVal)) {
+                    oldVal.__abortController.abort(new Error('replaced'));
+                    const { __staleWhileFetching: s } = oldVal;
+                    if (s !== undefined && !noDisposeOnSet) {
+                        if (this.#hasDispose) {
+                            this.#dispose?.(s, k, 'set');
+                        }
+                        if (this.#hasDisposeAfter) {
+                            this.#disposed?.push([s, k, 'set']);
+                        }
+                    }
+                }
+                else if (!noDisposeOnSet) {
+                    if (this.#hasDispose) {
+                        this.#dispose?.(oldVal, k, 'set');
+                    }
+                    if (this.#hasDisposeAfter) {
+                        this.#disposed?.push([oldVal, k, 'set']);
+                    }
+                }
+                this.#removeItemSize(index);
+                this.#addItemSize(index, size, status);
+                this.#valList[index] = v;
+                if (status) {
+                    status.set = 'replace';
+                    const oldValue = oldVal && this.#isBackgroundFetch(oldVal)
+                        ? oldVal.__staleWhileFetching
+                        : oldVal;
+                    if (oldValue !== undefined)
+                        status.oldValue = oldValue;
+                }
+            }
+            else if (status) {
+                status.set = 'update';
+            }
+        }
+        if (ttl !== 0 && !this.#ttls) {
+            this.#initializeTTLTracking();
+        }
+        if (this.#ttls) {
+            if (!noUpdateTTL) {
+                this.#setItemTTL(index, ttl, start);
+            }
+            if (status)
+                this.#statusTTL(status, index);
+        }
+        if (!noDisposeOnSet && this.#hasDisposeAfter && this.#disposed) {
+            const dt = this.#disposed;
+            let task;
+            while ((task = dt?.shift())) {
+                this.#disposeAfter?.(...task);
+            }
+        }
+        return this;
+    }
+    /**
+     * Evict the least recently used item, returning its value or
+     * `undefined` if cache is empty.
+     */
+    pop() {
+        try {
+            while (this.#size) {
+                const val = this.#valList[this.#head];
+                this.#evict(true);
+                if (this.#isBackgroundFetch(val)) {
+                    if (val.__staleWhileFetching) {
+                        return val.__staleWhileFetching;
+                    }
+                }
+                else if (val !== undefined) {
+                    return val;
+                }
+            }
+        }
+        finally {
+            if (this.#hasDisposeAfter && this.#disposed) {
+                const dt = this.#disposed;
+                let task;
+                while ((task = dt?.shift())) {
+                    this.#disposeAfter?.(...task);
+                }
+            }
+        }
+    }
+    #evict(free) {
+        const head = this.#head;
+        const k = this.#keyList[head];
+        const v = this.#valList[head];
+        if (this.#hasFetchMethod && this.#isBackgroundFetch(v)) {
+            v.__abortController.abort(new Error('evicted'));
+        }
+        else if (this.#hasDispose || this.#hasDisposeAfter) {
+            if (this.#hasDispose) {
+                this.#dispose?.(v, k, 'evict');
+            }
+            if (this.#hasDisposeAfter) {
+                this.#disposed?.push([v, k, 'evict']);
+            }
+        }
+        this.#removeItemSize(head);
+        // if we aren't about to use the index, then null these out
+        if (free) {
+            this.#keyList[head] = undefined;
+            this.#valList[head] = undefined;
+            this.#free.push(head);
+        }
+        if (this.#size === 1) {
+            this.#head = this.#tail = 0;
+            this.#free.length = 0;
+        }
+        else {
+            this.#head = this.#next[head];
+        }
+        this.#keyMap.delete(k);
+        this.#size--;
+        return head;
+    }
+    /**
+     * Check if a key is in the cache, without updating the recency of use.
+     * Will return false if the item is stale, even though it is technically
+     * in the cache.
+     *
+     * Check if a key is in the cache, without updating the recency of
+     * use. Age is updated if {@link LRUCache.OptionsBase.updateAgeOnHas} is set
+     * to `true` in either the options or the constructor.
+     *
+     * Will return `false` if the item is stale, even though it is technically in
+     * the cache. The difference can be determined (if it matters) by using a
+     * `status` argument, and inspecting the `has` field.
+     *
+     * Will not update item age unless
+     * {@link LRUCache.OptionsBase.updateAgeOnHas} is set.
+     */
+    has(k, hasOptions = {}) {
+        const { updateAgeOnHas = this.updateAgeOnHas, status } = hasOptions;
+        const index = this.#keyMap.get(k);
+        if (index !== undefined) {
+            const v = this.#valList[index];
+            if (this.#isBackgroundFetch(v) &&
+                v.__staleWhileFetching === undefined) {
+                return false;
+            }
+            if (!this.#isStale(index)) {
+                if (updateAgeOnHas) {
+                    this.#updateItemAge(index);
+                }
+                if (status) {
+                    status.has = 'hit';
+                    this.#statusTTL(status, index);
+                }
+                return true;
+            }
+            else if (status) {
+                status.has = 'stale';
+                this.#statusTTL(status, index);
+            }
+        }
+        else if (status) {
+            status.has = 'miss';
+        }
+        return false;
+    }
+    /**
+     * Like {@link LRUCache#get} but doesn't update recency or delete stale
+     * items.
+     *
+     * Returns `undefined` if the item is stale, unless
+     * {@link LRUCache.OptionsBase.allowStale} is set.
+     */
+    peek(k, peekOptions = {}) {
+        const { allowStale = this.allowStale } = peekOptions;
+        const index = this.#keyMap.get(k);
+        if (index === undefined ||
+            (!allowStale && this.#isStale(index))) {
+            return;
+        }
+        const v = this.#valList[index];
+        // either stale and allowed, or forcing a refresh of non-stale value
+        return this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v;
+    }
+    #backgroundFetch(k, index, options, context) {
+        const v = index === undefined ? undefined : this.#valList[index];
+        if (this.#isBackgroundFetch(v)) {
+            return v;
+        }
+        const ac = new AC();
+        const { signal } = options;
+        // when/if our AC signals, then stop listening to theirs.
+        signal?.addEventListener('abort', () => ac.abort(signal.reason), {
+            signal: ac.signal,
+        });
+        const fetchOpts = {
+            signal: ac.signal,
+            options,
+            context,
+        };
+        const cb = (v, updateCache = false) => {
+            const { aborted } = ac.signal;
+            const ignoreAbort = options.ignoreFetchAbort && v !== undefined;
+            if (options.status) {
+                if (aborted && !updateCache) {
+                    options.status.fetchAborted = true;
+                    options.status.fetchError = ac.signal.reason;
+                    if (ignoreAbort)
+                        options.status.fetchAbortIgnored = true;
+                }
+                else {
+                    options.status.fetchResolved = true;
+                }
+            }
+            if (aborted && !ignoreAbort && !updateCache) {
+                return fetchFail(ac.signal.reason);
+            }
+            // either we didn't abort, and are still here, or we did, and ignored
+            const bf = p;
+            if (this.#valList[index] === p) {
+                if (v === undefined) {
+                    if (bf.__staleWhileFetching) {
+                        this.#valList[index] = bf.__staleWhileFetching;
+                    }
+                    else {
+                        this.#delete(k, 'fetch');
+                    }
+                }
+                else {
+                    if (options.status)
+                        options.status.fetchUpdated = true;
+                    this.set(k, v, fetchOpts.options);
+                }
+            }
+            return v;
+        };
+        const eb = (er) => {
+            if (options.status) {
+                options.status.fetchRejected = true;
+                options.status.fetchError = er;
+            }
+            return fetchFail(er);
+        };
+        const fetchFail = (er) => {
+            const { aborted } = ac.signal;
+            const allowStaleAborted = aborted && options.allowStaleOnFetchAbort;
+            const allowStale = allowStaleAborted || options.allowStaleOnFetchRejection;
+            const noDelete = allowStale || options.noDeleteOnFetchRejection;
+            const bf = p;
+            if (this.#valList[index] === p) {
+                // if we allow stale on fetch rejections, then we need to ensure that
+                // the stale value is not removed from the cache when the fetch fails.
+                const del = !noDelete || bf.__staleWhileFetching === undefined;
+                if (del) {
+                    this.#delete(k, 'fetch');
+                }
+                else if (!allowStaleAborted) {
+                    // still replace the *promise* with the stale value,
+                    // since we are done with the promise at this point.
+                    // leave it untouched if we're still waiting for an
+                    // aborted background fetch that hasn't yet returned.
+                    this.#valList[index] = bf.__staleWhileFetching;
+                }
+            }
+            if (allowStale) {
+                if (options.status && bf.__staleWhileFetching !== undefined) {
+                    options.status.returnedStale = true;
+                }
+                return bf.__staleWhileFetching;
+            }
+            else if (bf.__returned === bf) {
+                throw er;
+            }
+        };
+        const pcall = (res, rej) => {
+            const fmp = this.#fetchMethod?.(k, v, fetchOpts);
+            if (fmp && fmp instanceof Promise) {
+                fmp.then(v => res(v === undefined ? undefined : v), rej);
+            }
+            // ignored, we go until we finish, regardless.
+            // defer check until we are actually aborting,
+            // so fetchMethod can override.
+            ac.signal.addEventListener('abort', () => {
+                if (!options.ignoreFetchAbort ||
+                    options.allowStaleOnFetchAbort) {
+                    res(undefined);
+                    // when it eventually resolves, update the cache.
+                    if (options.allowStaleOnFetchAbort) {
+                        res = v => cb(v, true);
+                    }
+                }
+            });
+        };
+        if (options.status)
+            options.status.fetchDispatched = true;
+        const p = new Promise(pcall).then(cb, eb);
+        const bf = Object.assign(p, {
+            __abortController: ac,
+            __staleWhileFetching: v,
+            __returned: undefined,
+        });
+        if (index === undefined) {
+            // internal, don't expose status.
+            this.set(k, bf, { ...fetchOpts.options, status: undefined });
+            index = this.#keyMap.get(k);
+        }
+        else {
+            this.#valList[index] = bf;
+        }
+        return bf;
+    }
+    #isBackgroundFetch(p) {
+        if (!this.#hasFetchMethod)
+            return false;
+        const b = p;
+        return (!!b &&
+            b instanceof Promise &&
+            b.hasOwnProperty('__staleWhileFetching') &&
+            b.__abortController instanceof AC);
+    }
+    async fetch(k, fetchOptions = {}) {
+        const { 
+        // get options
+        allowStale = this.allowStale, updateAgeOnGet = this.updateAgeOnGet, noDeleteOnStaleGet = this.noDeleteOnStaleGet, 
+        // set options
+        ttl = this.ttl, noDisposeOnSet = this.noDisposeOnSet, size = 0, sizeCalculation = this.sizeCalculation, noUpdateTTL = this.noUpdateTTL, 
+        // fetch exclusive options
+        noDeleteOnFetchRejection = this.noDeleteOnFetchRejection, allowStaleOnFetchRejection = this.allowStaleOnFetchRejection, ignoreFetchAbort = this.ignoreFetchAbort, allowStaleOnFetchAbort = this.allowStaleOnFetchAbort, context, forceRefresh = false, status, signal, } = fetchOptions;
+        if (!this.#hasFetchMethod) {
+            if (status)
+                status.fetch = 'get';
+            return this.get(k, {
+                allowStale,
+                updateAgeOnGet,
+                noDeleteOnStaleGet,
+                status,
+            });
+        }
+        const options = {
+            allowStale,
+            updateAgeOnGet,
+            noDeleteOnStaleGet,
+            ttl,
+            noDisposeOnSet,
+            size,
+            sizeCalculation,
+            noUpdateTTL,
+            noDeleteOnFetchRejection,
+            allowStaleOnFetchRejection,
+            allowStaleOnFetchAbort,
+            ignoreFetchAbort,
+            status,
+            signal,
+        };
+        let index = this.#keyMap.get(k);
+        if (index === undefined) {
+            if (status)
+                status.fetch = 'miss';
+            const p = this.#backgroundFetch(k, index, options, context);
+            return (p.__returned = p);
+        }
+        else {
+            // in cache, maybe already fetching
+            const v = this.#valList[index];
+            if (this.#isBackgroundFetch(v)) {
+                const stale = allowStale && v.__staleWhileFetching !== undefined;
+                if (status) {
+                    status.fetch = 'inflight';
+                    if (stale)
+                        status.returnedStale = true;
+                }
+                return stale ? v.__staleWhileFetching : (v.__returned = v);
+            }
+            // if we force a refresh, that means do NOT serve the cached value,
+            // unless we are already in the process of refreshing the cache.
+            const isStale = this.#isStale(index);
+            if (!forceRefresh && !isStale) {
+                if (status)
+                    status.fetch = 'hit';
+                this.#moveToTail(index);
+                if (updateAgeOnGet) {
+                    this.#updateItemAge(index);
+                }
+                if (status)
+                    this.#statusTTL(status, index);
+                return v;
+            }
+            // ok, it is stale or a forced refresh, and not already fetching.
+            // refresh the cache.
+            const p = this.#backgroundFetch(k, index, options, context);
+            const hasStale = p.__staleWhileFetching !== undefined;
+            const staleVal = hasStale && allowStale;
+            if (status) {
+                status.fetch = isStale ? 'stale' : 'refresh';
+                if (staleVal && isStale)
+                    status.returnedStale = true;
+            }
+            return staleVal ? p.__staleWhileFetching : (p.__returned = p);
+        }
+    }
+    async forceFetch(k, fetchOptions = {}) {
+        const v = await this.fetch(k, fetchOptions);
+        if (v === undefined)
+            throw new Error('fetch() returned undefined');
+        return v;
+    }
+    memo(k, memoOptions = {}) {
+        const memoMethod = this.#memoMethod;
+        if (!memoMethod) {
+            throw new Error('no memoMethod provided to constructor');
+        }
+        const { context, forceRefresh, ...options } = memoOptions;
+        const v = this.get(k, options);
+        if (!forceRefresh && v !== undefined)
+            return v;
+        const vv = memoMethod(k, v, {
+            options,
+            context,
+        });
+        this.set(k, vv, options);
+        return vv;
+    }
+    /**
+     * Return a value from the cache. Will update the recency of the cache
+     * entry found.
+     *
+     * If the key is not found, get() will return `undefined`.
+     */
+    get(k, getOptions = {}) {
+        const { allowStale = this.allowStale, updateAgeOnGet = this.updateAgeOnGet, noDeleteOnStaleGet = this.noDeleteOnStaleGet, status, } = getOptions;
+        const index = this.#keyMap.get(k);
+        if (index !== undefined) {
+            const value = this.#valList[index];
+            const fetching = this.#isBackgroundFetch(value);
+            if (status)
+                this.#statusTTL(status, index);
+            if (this.#isStale(index)) {
+                if (status)
+                    status.get = 'stale';
+                // delete only if not an in-flight background fetch
+                if (!fetching) {
+                    if (!noDeleteOnStaleGet) {
+                        this.#delete(k, 'expire');
+                    }
+                    if (status && allowStale)
+                        status.returnedStale = true;
+                    return allowStale ? value : undefined;
+                }
+                else {
+                    if (status &&
+                        allowStale &&
+                        value.__staleWhileFetching !== undefined) {
+                        status.returnedStale = true;
+                    }
+                    return allowStale ? value.__staleWhileFetching : undefined;
+                }
+            }
+            else {
+                if (status)
+                    status.get = 'hit';
+                // if we're currently fetching it, we don't actually have it yet
+                // it's not stale, which means this isn't a staleWhileRefetching.
+                // If it's not stale, and fetching, AND has a __staleWhileFetching
+                // value, then that means the user fetched with {forceRefresh:true},
+                // so it's safe to return that value.
+                if (fetching) {
+                    return value.__staleWhileFetching;
+                }
+                this.#moveToTail(index);
+                if (updateAgeOnGet) {
+                    this.#updateItemAge(index);
+                }
+                return value;
+            }
+        }
+        else if (status) {
+            status.get = 'miss';
+        }
+    }
+    #connect(p, n) {
+        this.#prev[n] = p;
+        this.#next[p] = n;
+    }
+    #moveToTail(index) {
+        // if tail already, nothing to do
+        // if head, move head to next[index]
+        // else
+        //   move next[prev[index]] to next[index] (head has no prev)
+        //   move prev[next[index]] to prev[index]
+        // prev[index] = tail
+        // next[tail] = index
+        // tail = index
+        if (index !== this.#tail) {
+            if (index === this.#head) {
+                this.#head = this.#next[index];
+            }
+            else {
+                this.#connect(this.#prev[index], this.#next[index]);
+            }
+            this.#connect(this.#tail, index);
+            this.#tail = index;
+        }
+    }
+    /**
+     * Deletes a key out of the cache.
+     *
+     * Returns true if the key was deleted, false otherwise.
+     */
+    delete(k) {
+        return this.#delete(k, 'delete');
+    }
+    #delete(k, reason) {
+        let deleted = false;
+        if (this.#size !== 0) {
+            const index = this.#keyMap.get(k);
+            if (index !== undefined) {
+                deleted = true;
+                if (this.#size === 1) {
+                    this.#clear(reason);
+                }
+                else {
+                    this.#removeItemSize(index);
+                    const v = this.#valList[index];
+                    if (this.#isBackgroundFetch(v)) {
+                        v.__abortController.abort(new Error('deleted'));
+                    }
+                    else if (this.#hasDispose || this.#hasDisposeAfter) {
+                        if (this.#hasDispose) {
+                            this.#dispose?.(v, k, reason);
+                        }
+                        if (this.#hasDisposeAfter) {
+                            this.#disposed?.push([v, k, reason]);
+                        }
+                    }
+                    this.#keyMap.delete(k);
+                    this.#keyList[index] = undefined;
+                    this.#valList[index] = undefined;
+                    if (index === this.#tail) {
+                        this.#tail = this.#prev[index];
+                    }
+                    else if (index === this.#head) {
+                        this.#head = this.#next[index];
+                    }
+                    else {
+                        const pi = this.#prev[index];
+                        this.#next[pi] = this.#next[index];
+                        const ni = this.#next[index];
+                        this.#prev[ni] = this.#prev[index];
+                    }
+                    this.#size--;
+                    this.#free.push(index);
+                }
+            }
+        }
+        if (this.#hasDisposeAfter && this.#disposed?.length) {
+            const dt = this.#disposed;
+            let task;
+            while ((task = dt?.shift())) {
+                this.#disposeAfter?.(...task);
+            }
+        }
+        return deleted;
+    }
+    /**
+     * Clear the cache entirely, throwing away all values.
+     */
+    clear() {
+        return this.#clear('delete');
+    }
+    #clear(reason) {
+        for (const index of this.#rindexes({ allowStale: true })) {
+            const v = this.#valList[index];
+            if (this.#isBackgroundFetch(v)) {
+                v.__abortController.abort(new Error('deleted'));
+            }
+            else {
+                const k = this.#keyList[index];
+                if (this.#hasDispose) {
+                    this.#dispose?.(v, k, reason);
+                }
+                if (this.#hasDisposeAfter) {
+                    this.#disposed?.push([v, k, reason]);
+                }
+            }
+        }
+        this.#keyMap.clear();
+        this.#valList.fill(undefined);
+        this.#keyList.fill(undefined);
+        if (this.#ttls && this.#starts) {
+            this.#ttls.fill(0);
+            this.#starts.fill(0);
+        }
+        if (this.#sizes) {
+            this.#sizes.fill(0);
+        }
+        this.#head = 0;
+        this.#tail = 0;
+        this.#free.length = 0;
+        this.#calculatedSize = 0;
+        this.#size = 0;
+        if (this.#hasDisposeAfter && this.#disposed) {
+            const dt = this.#disposed;
+            let task;
+            while ((task = dt?.shift())) {
+                this.#disposeAfter?.(...task);
+            }
+        }
+    }
+}
+//# sourceMappingURL=index.js.map
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/lru-cache/dist/esm/index.js.map b/mqtt-backend/node_modules/lru-cache/dist/esm/index.js.map
new file mode 100644
index 0000000..8f7ac53
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/esm/index.js.map
@@ -0,0 +1 @@
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PROCESS.emitWarning(msg, type, code, fn)\n    : console.error(`[${code}] ${type}: ${msg}`)\n}\n\nlet AC = globalThis.AbortController\nlet AS = globalThis.AbortSignal\n\n/* c8 ignore start */\nif (typeof AC === 'undefined') {\n  //@ts-ignore\n  AS = class AbortSignal {\n    onabort?: (...a: any[]) => any\n    _onabort: ((...a: any[]) => any)[] = []\n    reason?: any\n    aborted: boolean = false\n    addEventListener(_: string, fn: (...a: any[]) => any) {\n      this._onabort.push(fn)\n    }\n  }\n  //@ts-ignore\n  AC = class AbortController {\n    constructor() {\n      warnACPolyfill()\n    }\n    signal = new AS()\n    abort(reason: any) {\n      if (this.signal.aborted) return\n      //@ts-ignore\n      this.signal.reason = reason\n      //@ts-ignore\n      this.signal.aborted = true\n      //@ts-ignore\n      for (const fn of this.signal._onabort) {\n        fn(reason)\n      }\n      this.signal.onabort?.(reason)\n    }\n  }\n  let printACPolyfillWarning =\n    PROCESS.env?.LRU_CACHE_IGNORE_AC_WARNING !== '1'\n  const warnACPolyfill = () => {\n    if (!printACPolyfillWarning) return\n    printACPolyfillWarning = false\n    emitWarning(\n      'AbortController is not defined. If using lru-cache in ' +\n        'node 14, load an AbortController polyfill from the ' +\n        '`node-abort-controller` package. A minimal polyfill is ' +\n        'provided for use by LRUCache.fetch(), but it should not be ' +\n        'relied upon in other contexts (eg, passing it to other APIs that ' +\n        'use AbortController/AbortSignal might have undesirable effects). ' +\n        'You may disable this with LRU_CACHE_IGNORE_AC_WARNING=1 in the env.',\n      'NO_ABORT_CONTROLLER',\n      'ENOTSUP',\n      warnACPolyfill\n    )\n  }\n}\n/* c8 ignore stop */\n\nconst shouldWarn = (code: string) => !warned.has(code)\n\nconst TYPE = Symbol('type')\nexport type PosInt = number & { [TYPE]: 'Positive Integer' }\nexport type Index = number & { [TYPE]: 'LRUCache Index' }\n\nconst isPosInt = (n: any): n is PosInt =>\n  n && n === Math.floor(n) && n > 0 && isFinite(n)\n\nexport type UintArray = Uint8Array | Uint16Array | Uint32Array\nexport type NumberArray = UintArray | number[]\n\n/* c8 ignore start */\n// This is a little bit ridiculous, tbh.\n// The maximum array length is 2^32-1 or thereabouts on most JS impls.\n// And well before that point, you're caching the entire world, I mean,\n// that's ~32GB of just integers for the next/prev links, plus whatever\n// else to hold that many keys and values.  Just filling the memory with\n// zeroes at init time is brutal when you get that big.\n// But why not be complete?\n// Maybe in the future, these limits will have expanded.\nconst getUintArray = (max: number) =>\n  !isPosInt(max)\n    ? null\n    : max <= Math.pow(2, 8)\n    ? Uint8Array\n    : max <= Math.pow(2, 16)\n    ? Uint16Array\n    : max <= Math.pow(2, 32)\n    ? Uint32Array\n    : max <= Number.MAX_SAFE_INTEGER\n    ? ZeroArray\n    : null\n/* c8 ignore stop */\n\nclass ZeroArray extends Array<number> {\n  constructor(size: number) {\n    super(size)\n    this.fill(0)\n  }\n}\nexport type { ZeroArray }\nexport type { Stack }\n\nexport type StackLike = Stack | Index[]\nclass Stack {\n  heap: NumberArray\n  length: number\n  // private constructor\n  static #constructing: boolean = false\n  static create(max: number): StackLike {\n    const HeapCls = getUintArray(max)\n    if (!HeapCls) return []\n    Stack.#constructing = true\n    const s = new Stack(max, HeapCls)\n    Stack.#constructing = false\n    return s\n  }\n  constructor(\n    max: number,\n    HeapCls: { new (n: number): NumberArray }\n  ) {\n    /* c8 ignore start */\n    if (!Stack.#constructing) {\n      throw new TypeError('instantiate Stack using Stack.create(n)')\n    }\n    /* c8 ignore stop */\n    this.heap = new HeapCls(max)\n    this.length = 0\n  }\n  push(n: Index) {\n    this.heap[this.length++] = n\n  }\n  pop(): Index {\n    return this.heap[--this.length] as Index\n  }\n}\n\n/**\n * Promise representing an in-progress {@link LRUCache#fetch} call\n */\nexport type BackgroundFetch<V> = Promise<V | undefined> & {\n  __returned: BackgroundFetch<V> | undefined\n  __abortController: AbortController\n  __staleWhileFetching: V | undefined\n}\n\nexport type DisposeTask<K, V> = [\n  value: V,\n  key: K,\n  reason: LRUCache.DisposeReason\n]\n\nexport namespace LRUCache {\n  /**\n   * An integer greater than 0, reflecting the calculated size of items\n   */\n  export type Size = number\n\n  /**\n   * Integer greater than 0, representing some number of milliseconds, or the\n   * time at which a TTL started counting from.\n   */\n  export type Milliseconds = number\n\n  /**\n   * An integer greater than 0, reflecting a number of items\n   */\n  export type Count = number\n\n  /**\n   * The reason why an item was removed from the cache, passed\n   * to the {@link Disposer} methods.\n   *\n   * - `evict`: The item was evicted because it is the least recently used,\n   *   and the cache is full.\n   * - `set`: A new value was set, overwriting the old value being disposed.\n   * - `delete`: The item was explicitly deleted, either by calling\n   *   {@link LRUCache#delete}, {@link LRUCache#clear}, or\n   *   {@link LRUCache#set} with an undefined value.\n   * - `expire`: The item was removed due to exceeding its TTL.\n   * - `fetch`: A {@link OptionsBase#fetchMethod} operation returned\n   *   `undefined` or was aborted, causing the item to be deleted.\n   */\n  export type DisposeReason =\n    | 'evict'\n    | 'set'\n    | 'delete'\n    | 'expire'\n    | 'fetch'\n  /**\n   * A method called upon item removal, passed as the\n   * {@link OptionsBase.dispose} and/or\n   * {@link OptionsBase.disposeAfter} options.\n   */\n  export type Disposer<K, V> = (\n    value: V,\n    key: K,\n    reason: DisposeReason\n  ) => void\n\n  /**\n   * A function that returns the effective calculated size\n   * of an entry in the cache.\n   */\n  export type SizeCalculator<K, V> = (value: V, key: K) => Size\n\n  /**\n   * Options provided to the\n   * {@link OptionsBase.fetchMethod} function.\n   */\n  export interface FetcherOptions<K, V, FC = unknown> {\n    signal: AbortSignal\n    options: FetcherFetchOptions<K, V, FC>\n    /**\n     * Object provided in the {@link FetchOptions.context} option to\n     * {@link LRUCache#fetch}\n     */\n    context: FC\n  }\n\n  /**\n   * Occasionally, it may be useful to track the internal behavior of the\n   * cache, particularly for logging, debugging, or for behavior within the\n   * `fetchMethod`. To do this, you can pass a `status` object to the\n   * {@link LRUCache#fetch}, {@link LRUCache#get}, {@link LRUCache#set},\n   * {@link LRUCache#memo}, and {@link LRUCache#has} methods.\n   *\n   * The `status` option should be a plain JavaScript object. The following\n   * fields will be set on it appropriately, depending on the situation.\n   */\n  export interface Status<V> {\n    /**\n     * The status of a set() operation.\n     *\n     * - add: the item was not found in the cache, and was added\n     * - update: the item was in the cache, with the same value provided\n     * - replace: the item was in the cache, and replaced\n     * - miss: the item was not added to the cache for some reason\n     */\n    set?: 'add' | 'update' | 'replace' | 'miss'\n\n    /**\n     * the ttl stored for the item, or undefined if ttls are not used.\n     */\n    ttl?: Milliseconds\n\n    /**\n     * the start time for the item, or undefined if ttls are not used.\n     */\n    start?: Milliseconds\n\n    /**\n     * The timestamp used for TTL calculation\n     */\n    now?: Milliseconds\n\n    /**\n     * the remaining ttl for the item, or undefined if ttls are not used.\n     */\n    remainingTTL?: Milliseconds\n\n    /**\n     * The calculated size for the item, if sizes are used.\n     */\n    entrySize?: Size\n\n    /**\n     * The total calculated size of the cache, if sizes are used.\n     */\n    totalCalculatedSize?: Size\n\n    /**\n     * A flag indicating that the item was not stored, due to exceeding the\n     * {@link OptionsBase.maxEntrySize}\n     */\n    maxEntrySizeExceeded?: true\n\n    /**\n     * The old value, specified in the case of `set:'update'` or\n     * `set:'replace'`\n     */\n    oldValue?: V\n\n    /**\n     * The results of a {@link LRUCache#has} operation\n     *\n     * - hit: the item was found in the cache\n     * - stale: the item was found in the cache, but is stale\n     * - miss: the item was not found in the cache\n     */\n    has?: 'hit' | 'stale' | 'miss'\n\n    /**\n     * The status of a {@link LRUCache#fetch} operation.\n     * Note that this can change as the underlying fetch() moves through\n     * various states.\n     *\n     * - inflight: there is another fetch() for this key which is in process\n     * - get: there is no {@link OptionsBase.fetchMethod}, so\n     *   {@link LRUCache#get} was called.\n     * - miss: the item is not in cache, and will be fetched.\n     * - hit: the item is in the cache, and was resolved immediately.\n     * - stale: the item is in the cache, but stale.\n     * - refresh: the item is in the cache, and not stale, but\n     *   {@link FetchOptions.forceRefresh} was specified.\n     */\n    fetch?: 'get' | 'inflight' | 'miss' | 'hit' | 'stale' | 'refresh'\n\n    /**\n     * The {@link OptionsBase.fetchMethod} was called\n     */\n    fetchDispatched?: true\n\n    /**\n     * The cached value was updated after a successful call to\n     * {@link OptionsBase.fetchMethod}\n     */\n    fetchUpdated?: true\n\n    /**\n     * The reason for a fetch() rejection.  Either the error raised by the\n     * {@link OptionsBase.fetchMethod}, or the reason for an\n     * AbortSignal.\n     */\n    fetchError?: Error\n\n    /**\n     * The fetch received an abort signal\n     */\n    fetchAborted?: true\n\n    /**\n     * The abort signal received was ignored, and the fetch was allowed to\n     * continue.\n     */\n    fetchAbortIgnored?: true\n\n    /**\n     * The fetchMethod promise resolved successfully\n     */\n    fetchResolved?: true\n\n    /**\n     * The fetchMethod promise was rejected\n     */\n    fetchRejected?: true\n\n    /**\n     * The status of a {@link LRUCache#get} operation.\n     *\n     * - fetching: The item is currently being fetched.  If a previous value\n     *   is present and allowed, that will be returned.\n     * - stale: The item is in the cache, and is stale.\n     * - hit: the item is in the cache\n     * - miss: the item is not in the cache\n     */\n    get?: 'stale' | 'hit' | 'miss'\n\n    /**\n     * A fetch or get operation returned a stale value.\n     */\n    returnedStale?: true\n  }\n\n  /**\n   * options which override the options set in the LRUCache constructor\n   * when calling {@link LRUCache#fetch}.\n   *\n   * This is the union of {@link GetOptions} and {@link SetOptions}, plus\n   * {@link OptionsBase.noDeleteOnFetchRejection},\n   * {@link OptionsBase.allowStaleOnFetchRejection},\n   * {@link FetchOptions.forceRefresh}, and\n   * {@link FetcherOptions.context}\n   *\n   * Any of these may be modified in the {@link OptionsBase.fetchMethod}\n   * function, but the {@link GetOptions} fields will of course have no\n   * effect, as the {@link LRUCache#get} call already happened by the time\n   * the fetchMethod is called.\n   */\n  export interface FetcherFetchOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n      | 'noDeleteOnFetchRejection'\n      | 'allowStaleOnFetchRejection'\n      | 'ignoreFetchAbort'\n      | 'allowStaleOnFetchAbort'\n    > {\n    status?: Status<V>\n    size?: Size\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#fetch} method.\n   */\n  export interface FetchOptions<K, V, FC>\n    extends FetcherFetchOptions<K, V, FC> {\n    /**\n     * Set to true to force a re-load of the existing data, even if it\n     * is not yet stale.\n     */\n    forceRefresh?: boolean\n    /**\n     * Context provided to the {@link OptionsBase.fetchMethod} as\n     * the {@link FetcherOptions.context} param.\n     *\n     * If the FC type is specified as unknown (the default),\n     * undefined or void, then this is optional.  Otherwise, it will\n     * be required.\n     */\n    context?: FC\n    signal?: AbortSignal\n    status?: Status<V>\n  }\n  /**\n   * Options provided to {@link LRUCache#fetch} when the FC type is something\n   * other than `unknown`, `undefined`, or `void`\n   */\n  export interface FetchOptionsWithContext<K, V, FC>\n    extends FetchOptions<K, V, FC> {\n    context: FC\n  }\n  /**\n   * Options provided to {@link LRUCache#fetch} when the FC type is\n   * `undefined` or `void`\n   */\n  export interface FetchOptionsNoContext<K, V>\n    extends FetchOptions<K, V, undefined> {\n    context?: undefined\n  }\n\n  export interface MemoOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n      | 'noDeleteOnFetchRejection'\n      | 'allowStaleOnFetchRejection'\n      | 'ignoreFetchAbort'\n      | 'allowStaleOnFetchAbort'\n    > {\n    /**\n     * Set to true to force a re-load of the existing data, even if it\n     * is not yet stale.\n     */\n    forceRefresh?: boolean\n    /**\n     * Context provided to the {@link OptionsBase.memoMethod} as\n     * the {@link MemoizerOptions.context} param.\n     *\n     * If the FC type is specified as unknown (the default),\n     * undefined or void, then this is optional.  Otherwise, it will\n     * be required.\n     */\n    context?: FC\n    status?: Status<V>\n  }\n  /**\n   * Options provided to {@link LRUCache#memo} when the FC type is something\n   * other than `unknown`, `undefined`, or `void`\n   */\n  export interface MemoOptionsWithContext<K, V, FC>\n    extends MemoOptions<K, V, FC> {\n    context: FC\n  }\n  /**\n   * Options provided to {@link LRUCache#memo} when the FC type is\n   * `undefined` or `void`\n   */\n  export interface MemoOptionsNoContext<K, V>\n    extends MemoOptions<K, V, undefined> {\n    context?: undefined\n  }\n\n  /**\n   * Options provided to the\n   * {@link OptionsBase.memoMethod} function.\n   */\n  export interface MemoizerOptions<K, V, FC = unknown> {\n    options: MemoizerMemoOptions<K, V, FC>\n    /**\n     * Object provided in the {@link MemoOptions.context} option to\n     * {@link LRUCache#memo}\n     */\n    context: FC\n  }\n\n  /**\n   * options which override the options set in the LRUCache constructor\n   * when calling {@link LRUCache#memo}.\n   *\n   * This is the union of {@link GetOptions} and {@link SetOptions}, plus\n   * {@link MemoOptions.forceRefresh}, and\n   * {@link MemoerOptions.context}\n   *\n   * Any of these may be modified in the {@link OptionsBase.memoMethod}\n   * function, but the {@link GetOptions} fields will of course have no\n   * effect, as the {@link LRUCache#get} call already happened by the time\n   * the memoMethod is called.\n   */\n  export interface MemoizerMemoOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n    > {\n    status?: Status<V>\n    size?: Size\n    start?: Milliseconds\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#has} method.\n   */\n  export interface HasOptions<K, V, FC>\n    extends Pick<OptionsBase<K, V, FC>, 'updateAgeOnHas'> {\n    status?: Status<V>\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#get} method.\n   */\n  export interface GetOptions<K, V, FC>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet'\n    > {\n    status?: Status<V>\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#peek} method.\n   */\n  export interface PeekOptions<K, V, FC>\n    extends Pick<OptionsBase<K, V, FC>, 'allowStale'> {}\n\n  /**\n   * Options that may be passed to the {@link LRUCache#set} method.\n   */\n  export interface SetOptions<K, V, FC>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL'\n    > {\n    /**\n     * If size tracking is enabled, then setting an explicit size\n     * in the {@link LRUCache#set} call will prevent calling the\n     * {@link OptionsBase.sizeCalculation} function.\n     */\n    size?: Size\n    /**\n     * If TTL tracking is enabled, then setting an explicit start\n     * time in the {@link LRUCache#set} call will override the\n     * default time from `performance.now()` or `Date.now()`.\n     *\n     * Note that it must be a valid value for whichever time-tracking\n     * method is in use.\n     */\n    start?: Milliseconds\n    status?: Status<V>\n  }\n\n  /**\n   * The type signature for the {@link OptionsBase.fetchMethod} option.\n   */\n  export type Fetcher<K, V, FC = unknown> = (\n    key: K,\n    staleValue: V | undefined,\n    options: FetcherOptions<K, V, FC>\n  ) => Promise<V | undefined | void> | V | undefined | void\n\n  /**\n   * the type signature for the {@link OptionsBase.memoMethod} option.\n   */\n  export type Memoizer<K, V, FC = unknown> = (\n    key: K,\n    staleValue: V | undefined,\n    options: MemoizerOptions<K, V, FC>\n  ) => V\n\n  /**\n   * Options which may be passed to the {@link LRUCache} constructor.\n   *\n   * Most of these may be overridden in the various options that use\n   * them.\n   *\n   * Despite all being technically optional, the constructor requires that\n   * a cache is at minimum limited by one or more of {@link OptionsBase.max},\n   * {@link OptionsBase.ttl}, or {@link OptionsBase.maxSize}.\n   *\n   * If {@link OptionsBase.ttl} is used alone, then it is strongly advised\n   * (and in fact required by the type definitions here) that the cache\n   * also set {@link OptionsBase.ttlAutopurge}, to prevent potentially\n   * unbounded storage.\n   *\n   * All options are also available on the {@link LRUCache} instance, making\n   * it safe to pass an LRUCache instance as the options argumemnt to\n   * make another empty cache of the same type.\n   *\n   * Some options are marked as read-only, because changing them after\n   * instantiation is not safe. Changing any of the other options will of\n   * course only have an effect on subsequent method calls.\n   */\n  export interface OptionsBase<K, V, FC> {\n    /**\n     * The maximum number of items to store in the cache before evicting\n     * old entries. This is read-only on the {@link LRUCache} instance,\n     * and may not be overridden.\n     *\n     * If set, then storage space will be pre-allocated at construction\n     * time, and the cache will perform significantly faster.\n     *\n     * Note that significantly fewer items may be stored, if\n     * {@link OptionsBase.maxSize} and/or {@link OptionsBase.ttl} are also\n     * set.\n     *\n     * **It is strongly recommended to set a `max` to prevent unbounded growth\n     * of the cache.**\n     */\n    max?: Count\n\n    /**\n     * Max time in milliseconds for items to live in cache before they are\n     * considered stale.  Note that stale items are NOT preemptively removed by\n     * default, and MAY live in the cache, contributing to its LRU max, long\n     * after they have expired, unless {@link OptionsBase.ttlAutopurge} is\n     * set.\n     *\n     * If set to `0` (the default value), then that means \"do not track\n     * TTL\", not \"expire immediately\".\n     *\n     * Also, as this cache is optimized for LRU/MRU operations, some of\n     * the staleness/TTL checks will reduce performance, as they will incur\n     * overhead by deleting items.\n     *\n     * This is not primarily a TTL cache, and does not make strong TTL\n     * guarantees. There is no pre-emptive pruning of expired items, but you\n     * _may_ set a TTL on the cache, and it will treat expired items as missing\n     * when they are fetched, and delete them.\n     *\n     * Optional, but must be a non-negative integer in ms if specified.\n     *\n     * This may be overridden by passing an options object to `cache.set()`.\n     *\n     * At least one of `max`, `maxSize`, or `TTL` is required. This must be a\n     * positive integer if set.\n     *\n     * Even if ttl tracking is enabled, **it is strongly recommended to set a\n     * `max` to prevent unbounded growth of the cache.**\n     *\n     * If ttl tracking is enabled, and `max` and `maxSize` are not set,\n     * and `ttlAutopurge` is not set, then a warning will be emitted\n     * cautioning about the potential for unbounded memory consumption.\n     * (The TypeScript definitions will also discourage this.)\n     */\n    ttl?: Milliseconds\n\n    /**\n     * Minimum amount of time in ms in which to check for staleness.\n     * Defaults to 1, which means that the current time is checked\n     * at most once per millisecond.\n     *\n     * Set to 0 to check the current time every time staleness is tested.\n     * (This reduces performance, and is theoretically unnecessary.)\n     *\n     * Setting this to a higher value will improve performance somewhat\n     * while using ttl tracking, albeit at the expense of keeping stale\n     * items around a bit longer than their TTLs would indicate.\n     *\n     * @default 1\n     */\n    ttlResolution?: Milliseconds\n\n    /**\n     * Preemptively remove stale items from the cache.\n     *\n     * Note that this may *significantly* degrade performance, especially if\n     * the cache is storing a large number of items. It is almost always best\n     * to just leave the stale items in the cache, and let them fall out as new\n     * items are added.\n     *\n     * Note that this means that {@link OptionsBase.allowStale} is a bit\n     * pointless, as stale items will be deleted almost as soon as they\n     * expire.\n     *\n     * Use with caution!\n     */\n    ttlAutopurge?: boolean\n\n    /**\n     * When using time-expiring entries with `ttl`, setting this to `true` will\n     * make each item's age reset to 0 whenever it is retrieved from cache with\n     * {@link LRUCache#get}, causing it to not expire. (It can still fall out\n     * of cache based on recency of use, of course.)\n     *\n     * Has no effect if {@link OptionsBase.ttl} is not set.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     */\n    updateAgeOnGet?: boolean\n\n    /**\n     * When using time-expiring entries with `ttl`, setting this to `true` will\n     * make each item's age reset to 0 whenever its presence in the cache is\n     * checked with {@link LRUCache#has}, causing it to not expire. (It can\n     * still fall out of cache based on recency of use, of course.)\n     *\n     * Has no effect if {@link OptionsBase.ttl} is not set.\n     */\n    updateAgeOnHas?: boolean\n\n    /**\n     * Allow {@link LRUCache#get} and {@link LRUCache#fetch} calls to return\n     * stale data, if available.\n     *\n     * By default, if you set `ttl`, stale items will only be deleted from the\n     * cache when you `get(key)`. That is, it's not preemptively pruning items,\n     * unless {@link OptionsBase.ttlAutopurge} is set.\n     *\n     * If you set `allowStale:true`, it'll return the stale value *as well as*\n     * deleting it. If you don't set this, then it'll return `undefined` when\n     * you try to get a stale entry.\n     *\n     * Note that when a stale entry is fetched, _even if it is returned due to\n     * `allowStale` being set_, it is removed from the cache immediately. You\n     * can suppress this behavior by setting\n     * {@link OptionsBase.noDeleteOnStaleGet}, either in the constructor, or in\n     * the options provided to {@link LRUCache#get}.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     * The `cache.has()` method will always return `false` for stale items.\n     *\n     * Only relevant if a ttl is set.\n     */\n    allowStale?: boolean\n\n    /**\n     * Function that is called on items when they are dropped from the\n     * cache, as `dispose(value, key, reason)`.\n     *\n     * This can be handy if you want to close file descriptors or do\n     * other cleanup tasks when items are no longer stored in the cache.\n     *\n     * **NOTE**: It is called _before_ the item has been fully removed\n     * from the cache, so if you want to put it right back in, you need\n     * to wait until the next tick. If you try to add it back in during\n     * the `dispose()` function call, it will break things in subtle and\n     * weird ways.\n     *\n     * Unlike several other options, this may _not_ be overridden by\n     * passing an option to `set()`, for performance reasons.\n     *\n     * The `reason` will be one of the following strings, corresponding\n     * to the reason for the item's deletion:\n     *\n     * - `evict` Item was evicted to make space for a new addition\n     * - `set` Item was overwritten by a new value\n     * - `expire` Item expired its TTL\n     * - `fetch` Item was deleted due to a failed or aborted fetch, or a\n     *   fetchMethod returning `undefined.\n     * - `delete` Item was removed by explicit `cache.delete(key)`,\n     *   `cache.clear()`, or `cache.set(key, undefined)`.\n     */\n    dispose?: Disposer<K, V>\n\n    /**\n     * The same as {@link OptionsBase.dispose}, but called *after* the entry\n     * is completely removed and the cache is once again in a clean state.\n     *\n     * It is safe to add an item right back into the cache at this point.\n     * However, note that it is *very* easy to inadvertently create infinite\n     * recursion this way.\n     */\n    disposeAfter?: Disposer<K, V>\n\n    /**\n     * Set to true to suppress calling the\n     * {@link OptionsBase.dispose} function if the entry key is\n     * still accessible within the cache.\n     *\n     * This may be overridden by passing an options object to\n     * {@link LRUCache#set}.\n     *\n     * Only relevant if `dispose` or `disposeAfter` are set.\n     */\n    noDisposeOnSet?: boolean\n\n    /**\n     * Boolean flag to tell the cache to not update the TTL when setting a new\n     * value for an existing key (ie, when updating a value rather than\n     * inserting a new value).  Note that the TTL value is _always_ set (if\n     * provided) when adding a new entry into the cache.\n     *\n     * Has no effect if a {@link OptionsBase.ttl} is not set.\n     *\n     * May be passed as an option to {@link LRUCache#set}.\n     */\n    noUpdateTTL?: boolean\n\n    /**\n     * Set to a positive integer to track the sizes of items added to the\n     * cache, and automatically evict items in order to stay below this size.\n     * Note that this may result in fewer than `max` items being stored.\n     *\n     * Attempting to add an item to the cache whose calculated size is greater\n     * that this amount will be a no-op. The item will not be cached, and no\n     * other items will be evicted.\n     *\n     * Optional, must be a positive integer if provided.\n     *\n     * Sets `maxEntrySize` to the same value, unless a different value is\n     * provided for `maxEntrySize`.\n     *\n     * At least one of `max`, `maxSize`, or `TTL` is required. This must be a\n     * positive integer if set.\n     *\n     * Even if size tracking is enabled, **it is strongly recommended to set a\n     * `max` to prevent unbounded growth of the cache.**\n     *\n     * Note also that size tracking can negatively impact performance,\n     * though for most cases, only minimally.\n     */\n    maxSize?: Size\n\n    /**\n     * The maximum allowed size for any single item in the cache.\n     *\n     * If a larger item is passed to {@link LRUCache#set} or returned by a\n     * {@link OptionsBase.fetchMethod} or {@link OptionsBase.memoMethod}, then\n     * it will not be stored in the cache.\n     *\n     * Attempting to add an item whose calculated size is greater than\n     * this amount will not cache the item or evict any old items, but\n     * WILL delete an existing value if one is already present.\n     *\n     * Optional, must be a positive integer if provided. Defaults to\n     * the value of `maxSize` if provided.\n     */\n    maxEntrySize?: Size\n\n    /**\n     * A function that returns a number indicating the item's size.\n     *\n     * Requires {@link OptionsBase.maxSize} to be set.\n     *\n     * If not provided, and {@link OptionsBase.maxSize} or\n     * {@link OptionsBase.maxEntrySize} are set, then all\n     * {@link LRUCache#set} calls **must** provide an explicit\n     * {@link SetOptions.size} or sizeCalculation param.\n     */\n    sizeCalculation?: SizeCalculator<K, V>\n\n    /**\n     * Method that provides the implementation for {@link LRUCache#fetch}\n     *\n     * ```ts\n     * fetchMethod(key, staleValue, { signal, options, context })\n     * ```\n     *\n     * If `fetchMethod` is not provided, then `cache.fetch(key)` is equivalent\n     * to `Promise.resolve(cache.get(key))`.\n     *\n     * If at any time, `signal.aborted` is set to `true`, or if the\n     * `signal.onabort` method is called, or if it emits an `'abort'` event\n     * which you can listen to with `addEventListener`, then that means that\n     * the fetch should be abandoned. This may be passed along to async\n     * functions aware of AbortController/AbortSignal behavior.\n     *\n     * The `fetchMethod` should **only** return `undefined` or a Promise\n     * resolving to `undefined` if the AbortController signaled an `abort`\n     * event. In all other cases, it should return or resolve to a value\n     * suitable for adding to the cache.\n     *\n     * The `options` object is a union of the options that may be provided to\n     * `set()` and `get()`. If they are modified, then that will result in\n     * modifying the settings to `cache.set()` when the value is resolved, and\n     * in the case of\n     * {@link OptionsBase.noDeleteOnFetchRejection} and\n     * {@link OptionsBase.allowStaleOnFetchRejection}, the handling of\n     * `fetchMethod` failures.\n     *\n     * For example, a DNS cache may update the TTL based on the value returned\n     * from a remote DNS server by changing `options.ttl` in the `fetchMethod`.\n     */\n    fetchMethod?: Fetcher<K, V, FC>\n\n    /**\n     * Method that provides the implementation for {@link LRUCache#memo}\n     */\n    memoMethod?: Memoizer<K, V, FC>\n\n    /**\n     * Set to true to suppress the deletion of stale data when a\n     * {@link OptionsBase.fetchMethod} returns a rejected promise.\n     */\n    noDeleteOnFetchRejection?: boolean\n\n    /**\n     * Do not delete stale items when they are retrieved with\n     * {@link LRUCache#get}.\n     *\n     * Note that the `get` return value will still be `undefined`\n     * unless {@link OptionsBase.allowStale} is true.\n     *\n     * When using time-expiring entries with `ttl`, by default stale\n     * items will be removed from the cache when the key is accessed\n     * with `cache.get()`.\n     *\n     * Setting this option will cause stale items to remain in the cache, until\n     * they are explicitly deleted with `cache.delete(key)`, or retrieved with\n     * `noDeleteOnStaleGet` set to `false`.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     *\n     * Only relevant if a ttl is used.\n     */\n    noDeleteOnStaleGet?: boolean\n\n    /**\n     * Set to true to allow returning stale data when a\n     * {@link OptionsBase.fetchMethod} throws an error or returns a rejected\n     * promise.\n     *\n     * This differs from using {@link OptionsBase.allowStale} in that stale\n     * data will ONLY be returned in the case that the {@link LRUCache#fetch}\n     * fails, not any other times.\n     *\n     * If a `fetchMethod` fails, and there is no stale value available, the\n     * `fetch()` will resolve to `undefined`. Ie, all `fetchMethod` errors are\n     * suppressed.\n     *\n     * Implies `noDeleteOnFetchRejection`.\n     *\n     * This may be set in calls to `fetch()`, or defaulted on the constructor,\n     * or overridden by modifying the options object in the `fetchMethod`.\n     */\n    allowStaleOnFetchRejection?: boolean\n\n    /**\n     * Set to true to return a stale value from the cache when the\n     * `AbortSignal` passed to the {@link OptionsBase.fetchMethod} dispatches\n     * an `'abort'` event, whether user-triggered, or due to internal cache\n     * behavior.\n     *\n     * Unless {@link OptionsBase.ignoreFetchAbort} is also set, the underlying\n     * {@link OptionsBase.fetchMethod} will still be considered canceled, and\n     * any value it returns will be ignored and not cached.\n     *\n     * Caveat: since fetches are aborted when a new value is explicitly\n     * set in the cache, this can lead to fetch returning a stale value,\n     * since that was the fallback value _at the moment the `fetch()` was\n     * initiated_, even though the new updated value is now present in\n     * the cache.\n     *\n     * For example:\n     *\n     * ```ts\n     * const cache = new LRUCache<string, any>({\n     *   ttl: 100,\n     *   fetchMethod: async (url, oldValue, { signal }) =>  {\n     *     const res = await fetch(url, { signal })\n     *     return await res.json()\n     *   }\n     * })\n     * cache.set('https://example.com/', { some: 'data' })\n     * // 100ms go by...\n     * const result = cache.fetch('https://example.com/')\n     * cache.set('https://example.com/', { other: 'thing' })\n     * console.log(await result) // { some: 'data' }\n     * console.log(cache.get('https://example.com/')) // { other: 'thing' }\n     * ```\n     */\n    allowStaleOnFetchAbort?: boolean\n\n    /**\n     * Set to true to ignore the `abort` event emitted by the `AbortSignal`\n     * object passed to {@link OptionsBase.fetchMethod}, and still cache the\n     * resulting resolution value, as long as it is not `undefined`.\n     *\n     * When used on its own, this means aborted {@link LRUCache#fetch} calls\n     * are not immediately resolved or rejected when they are aborted, and\n     * instead take the full time to await.\n     *\n     * When used with {@link OptionsBase.allowStaleOnFetchAbort}, aborted\n     * {@link LRUCache#fetch} calls will resolve immediately to their stale\n     * cached value or `undefined`, and will continue to process and eventually\n     * update the cache when they resolve, as long as the resulting value is\n     * not `undefined`, thus supporting a \"return stale on timeout while\n     * refreshing\" mechanism by passing `AbortSignal.timeout(n)` as the signal.\n     *\n     * For example:\n     *\n     * ```ts\n     * const c = new LRUCache({\n     *   ttl: 100,\n     *   ignoreFetchAbort: true,\n     *   allowStaleOnFetchAbort: true,\n     *   fetchMethod: async (key, oldValue, { signal }) => {\n     *     // note: do NOT pass the signal to fetch()!\n     *     // let's say this fetch can take a long time.\n     *     const res = await fetch(`https://slow-backend-server/${key}`)\n     *     return await res.json()\n     *   },\n     * })\n     *\n     * // this will return the stale value after 100ms, while still\n     * // updating in the background for next time.\n     * const val = await c.fetch('key', { signal: AbortSignal.timeout(100) })\n     * ```\n     *\n     * **Note**: regardless of this setting, an `abort` event _is still\n     * emitted on the `AbortSignal` object_, so may result in invalid results\n     * when passed to other underlying APIs that use AbortSignals.\n     *\n     * This may be overridden in the {@link OptionsBase.fetchMethod} or the\n     * call to {@link LRUCache#fetch}.\n     */\n    ignoreFetchAbort?: boolean\n  }\n\n  export interface OptionsMaxLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    max: Count\n  }\n  export interface OptionsTTLLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    ttl: Milliseconds\n    ttlAutopurge: boolean\n  }\n  export interface OptionsSizeLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    maxSize: Size\n  }\n\n  /**\n   * The valid safe options for the {@link LRUCache} constructor\n   */\n  export type Options<K, V, FC> =\n    | OptionsMaxLimit<K, V, FC>\n    | OptionsSizeLimit<K, V, FC>\n    | OptionsTTLLimit<K, V, FC>\n\n  /**\n   * Entry objects used by {@link LRUCache#load} and {@link LRUCache#dump},\n   * and returned by {@link LRUCache#info}.\n   */\n  export interface Entry<V> {\n    value: V\n    ttl?: Milliseconds\n    size?: Size\n    start?: Milliseconds\n  }\n}\n\n/**\n * Default export, the thing you're using this module to get.\n *\n * The `K` and `V` types define the key and value types, respectively. The\n * optional `FC` type defines the type of the `context` object passed to\n * `cache.fetch()` and `cache.memo()`.\n *\n * Keys and values **must not** be `null` or `undefined`.\n *\n * All properties from the options object (with the exception of `max`,\n * `maxSize`, `fetchMethod`, `memoMethod`, `dispose` and `disposeAfter`) are\n * added as normal public members. (The listed options are read-only getters.)\n *\n * Changing any of these will alter the defaults for subsequent method calls.\n */\nexport class LRUCache<K extends {}, V extends {}, FC = unknown>\n  implements Map<K, V>\n{\n  // options that cannot be changed without disaster\n  readonly #max: LRUCache.Count\n  readonly #maxSize: LRUCache.Size\n  readonly #dispose?: LRUCache.Disposer<K, V>\n  readonly #disposeAfter?: LRUCache.Disposer<K, V>\n  readonly #fetchMethod?: LRUCache.Fetcher<K, V, FC>\n  readonly #memoMethod?: LRUCache.Memoizer<K, V, FC>\n\n  /**\n   * {@link LRUCache.OptionsBase.ttl}\n   */\n  ttl: LRUCache.Milliseconds\n\n  /**\n   * {@link LRUCache.OptionsBase.ttlResolution}\n   */\n  ttlResolution: LRUCache.Milliseconds\n  /**\n   * {@link LRUCache.OptionsBase.ttlAutopurge}\n   */\n  ttlAutopurge: boolean\n  /**\n   * {@link LRUCache.OptionsBase.updateAgeOnGet}\n   */\n  updateAgeOnGet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.updateAgeOnHas}\n   */\n  updateAgeOnHas: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStale}\n   */\n  allowStale: boolean\n\n  /**\n   * {@link LRUCache.OptionsBase.noDisposeOnSet}\n   */\n  noDisposeOnSet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.noUpdateTTL}\n   */\n  noUpdateTTL: boolean\n  /**\n   * {@link LRUCache.OptionsBase.maxEntrySize}\n   */\n  maxEntrySize: LRUCache.Size\n  /**\n   * {@link LRUCache.OptionsBase.sizeCalculation}\n   */\n  sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  /**\n   * {@link LRUCache.OptionsBase.noDeleteOnFetchRejection}\n   */\n  noDeleteOnFetchRejection: boolean\n  /**\n   * {@link LRUCache.OptionsBase.noDeleteOnStaleGet}\n   */\n  noDeleteOnStaleGet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort}\n   */\n  allowStaleOnFetchAbort: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchRejection}\n   */\n  allowStaleOnFetchRejection: boolean\n  /**\n   * {@link LRUCache.OptionsBase.ignoreFetchAbort}\n   */\n  ignoreFetchAbort: boolean\n\n  // computed properties\n  #size: LRUCache.Count\n  #calculatedSize: LRUCache.Size\n  #keyMap: Map<K, Index>\n  #keyList: (K | undefined)[]\n  #valList: (V | BackgroundFetch<V> | undefined)[]\n  #next: NumberArray\n  #prev: NumberArray\n  #head: Index\n  #tail: Index\n  #free: StackLike\n  #disposed?: DisposeTask<K, V>[]\n  #sizes?: ZeroArray\n  #starts?: ZeroArray\n  #ttls?: ZeroArray\n\n  #hasDispose: boolean\n  #hasFetchMethod: boolean\n  #hasDisposeAfter: boolean\n\n  /**\n   * Do not call this method unless you need to inspect the\n   * inner workings of the cache.  If anything returned by this\n   * object is modified in any way, strange breakage may occur.\n   *\n   * These fields are private for a reason!\n   *\n   * @internal\n   */\n  static unsafeExposeInternals<\n    K extends {},\n    V extends {},\n    FC extends unknown = unknown\n  >(c: LRUCache<K, V, FC>) {\n    return {\n      // properties\n      starts: c.#starts,\n      ttls: c.#ttls,\n      sizes: c.#sizes,\n      keyMap: c.#keyMap as Map<K, number>,\n      keyList: c.#keyList,\n      valList: c.#valList,\n      next: c.#next,\n      prev: c.#prev,\n      get head() {\n        return c.#head\n      },\n      get tail() {\n        return c.#tail\n      },\n      free: c.#free,\n      // methods\n      isBackgroundFetch: (p: any) => c.#isBackgroundFetch(p),\n      backgroundFetch: (\n        k: K,\n        index: number | undefined,\n        options: LRUCache.FetchOptions<K, V, FC>,\n        context: any\n      ): BackgroundFetch<V> =>\n        c.#backgroundFetch(\n          k,\n          index as Index | undefined,\n          options,\n          context\n        ),\n      moveToTail: (index: number): void =>\n        c.#moveToTail(index as Index),\n      indexes: (options?: { allowStale: boolean }) =>\n        c.#indexes(options),\n      rindexes: (options?: { allowStale: boolean }) =>\n        c.#rindexes(options),\n      isStale: (index: number | undefined) =>\n        c.#isStale(index as Index),\n    }\n  }\n\n  // Protected read-only members\n\n  /**\n   * {@link LRUCache.OptionsBase.max} (read-only)\n   */\n  get max(): LRUCache.Count {\n    return this.#max\n  }\n  /**\n   * {@link LRUCache.OptionsBase.maxSize} (read-only)\n   */\n  get maxSize(): LRUCache.Count {\n    return this.#maxSize\n  }\n  /**\n   * The total computed size of items in the cache (read-only)\n   */\n  get calculatedSize(): LRUCache.Size {\n    return this.#calculatedSize\n  }\n  /**\n   * The number of items stored in the cache (read-only)\n   */\n  get size(): LRUCache.Count {\n    return this.#size\n  }\n  /**\n   * {@link LRUCache.OptionsBase.fetchMethod} (read-only)\n   */\n  get fetchMethod(): LRUCache.Fetcher<K, V, FC> | undefined {\n    return this.#fetchMethod\n  }\n  get memoMethod(): LRUCache.Memoizer<K, V, FC> | undefined {\n    return this.#memoMethod\n  }\n  /**\n   * {@link LRUCache.OptionsBase.dispose} (read-only)\n   */\n  get dispose() {\n    return this.#dispose\n  }\n  /**\n   * {@link LRUCache.OptionsBase.disposeAfter} (read-only)\n   */\n  get disposeAfter() {\n    return this.#disposeAfter\n  }\n\n  constructor(\n    options: LRUCache.Options<K, V, FC> | LRUCache<K, V, FC>\n  ) {\n    const {\n      max = 0,\n      ttl,\n      ttlResolution = 1,\n      ttlAutopurge,\n      updateAgeOnGet,\n      updateAgeOnHas,\n      allowStale,\n      dispose,\n      disposeAfter,\n      noDisposeOnSet,\n      noUpdateTTL,\n      maxSize = 0,\n      maxEntrySize = 0,\n      sizeCalculation,\n      fetchMethod,\n      memoMethod,\n      noDeleteOnFetchRejection,\n      noDeleteOnStaleGet,\n      allowStaleOnFetchRejection,\n      allowStaleOnFetchAbort,\n      ignoreFetchAbort,\n    } = options\n\n    if (max !== 0 && !isPosInt(max)) {\n      throw new TypeError('max option must be a nonnegative integer')\n    }\n\n    const UintArray = max ? getUintArray(max) : Array\n    if (!UintArray) {\n      throw new Error('invalid max value: ' + max)\n    }\n\n    this.#max = max\n    this.#maxSize = maxSize\n    this.maxEntrySize = maxEntrySize || this.#maxSize\n    this.sizeCalculation = sizeCalculation\n    if (this.sizeCalculation) {\n      if (!this.#maxSize && !this.maxEntrySize) {\n        throw new TypeError(\n          'cannot set sizeCalculation without setting maxSize or maxEntrySize'\n        )\n      }\n      if (typeof this.sizeCalculation !== 'function') {\n        throw new TypeError('sizeCalculation set to non-function')\n      }\n    }\n\n    if (\n      memoMethod !== undefined &&\n      typeof memoMethod !== 'function'\n    ) {\n      throw new TypeError('memoMethod must be a function if defined')\n    }\n    this.#memoMethod = memoMethod\n\n    if (\n      fetchMethod !== undefined &&\n      typeof fetchMethod !== 'function'\n    ) {\n      throw new TypeError(\n        'fetchMethod must be a function if specified'\n      )\n    }\n    this.#fetchMethod = fetchMethod\n    this.#hasFetchMethod = !!fetchMethod\n\n    this.#keyMap = new Map()\n    this.#keyList = new Array(max).fill(undefined)\n    this.#valList = new Array(max).fill(undefined)\n    this.#next = new UintArray(max)\n    this.#prev = new UintArray(max)\n    this.#head = 0 as Index\n    this.#tail = 0 as Index\n    this.#free = Stack.create(max)\n    this.#size = 0\n    this.#calculatedSize = 0\n\n    if (typeof dispose === 'function') {\n      this.#dispose = dispose\n    }\n    if (typeof disposeAfter === 'function') {\n      this.#disposeAfter = disposeAfter\n      this.#disposed = []\n    } else {\n      this.#disposeAfter = undefined\n      this.#disposed = undefined\n    }\n    this.#hasDispose = !!this.#dispose\n    this.#hasDisposeAfter = !!this.#disposeAfter\n\n    this.noDisposeOnSet = !!noDisposeOnSet\n    this.noUpdateTTL = !!noUpdateTTL\n    this.noDeleteOnFetchRejection = !!noDeleteOnFetchRejection\n    this.allowStaleOnFetchRejection = !!allowStaleOnFetchRejection\n    this.allowStaleOnFetchAbort = !!allowStaleOnFetchAbort\n    this.ignoreFetchAbort = !!ignoreFetchAbort\n\n    // NB: maxEntrySize is set to maxSize if it's set\n    if (this.maxEntrySize !== 0) {\n      if (this.#maxSize !== 0) {\n        if (!isPosInt(this.#maxSize)) {\n          throw new TypeError(\n            'maxSize must be a positive integer if specified'\n          )\n        }\n      }\n      if (!isPosInt(this.maxEntrySize)) {\n        throw new TypeError(\n          'maxEntrySize must be a positive integer if specified'\n        )\n      }\n      this.#initializeSizeTracking()\n    }\n\n    this.allowStale = !!allowStale\n    this.noDeleteOnStaleGet = !!noDeleteOnStaleGet\n    this.updateAgeOnGet = !!updateAgeOnGet\n    this.updateAgeOnHas = !!updateAgeOnHas\n    this.ttlResolution =\n      isPosInt(ttlResolution) || ttlResolution === 0\n        ? ttlResolution\n        : 1\n    this.ttlAutopurge = !!ttlAutopurge\n    this.ttl = ttl || 0\n    if (this.ttl) {\n      if (!isPosInt(this.ttl)) {\n        throw new TypeError(\n          'ttl must be a positive integer if specified'\n        )\n      }\n      this.#initializeTTLTracking()\n    }\n\n    // do not allow completely unbounded caches\n    if (this.#max === 0 && this.ttl === 0 && this.#maxSize === 0) {\n      throw new TypeError(\n        'At least one of max, maxSize, or ttl is required'\n      )\n    }\n    if (!this.ttlAutopurge && !this.#max && !this.#maxSize) {\n      const code = 'LRU_CACHE_UNBOUNDED'\n      if (shouldWarn(code)) {\n        warned.add(code)\n        const msg =\n          'TTL caching without ttlAutopurge, max, or maxSize can ' +\n          'result in unbounded memory consumption.'\n        emitWarning(msg, 'UnboundedCacheWarning', code, LRUCache)\n      }\n    }\n  }\n\n  /**\n   * Return the number of ms left in the item's TTL. If item is not in cache,\n   * returns `0`. Returns `Infinity` if item is in cache without a defined TTL.\n   */\n  getRemainingTTL(key: K) {\n    return this.#keyMap.has(key) ? Infinity : 0\n  }\n\n  #initializeTTLTracking() {\n    const ttls = new ZeroArray(this.#max)\n    const starts = new ZeroArray(this.#max)\n    this.#ttls = ttls\n    this.#starts = starts\n\n    this.#setItemTTL = (index, ttl, start = perf.now()) => {\n      starts[index] = ttl !== 0 ? start : 0\n      ttls[index] = ttl\n      if (ttl !== 0 && this.ttlAutopurge) {\n        const t = setTimeout(() => {\n          if (this.#isStale(index)) {\n            this.#delete(this.#keyList[index] as K, 'expire')\n          }\n        }, ttl + 1)\n        // unref() not supported on all platforms\n        /* c8 ignore start */\n        if (t.unref) {\n          t.unref()\n        }\n        /* c8 ignore stop */\n      }\n    }\n\n    this.#updateItemAge = index => {\n      starts[index] = ttls[index] !== 0 ? perf.now() : 0\n    }\n\n    this.#statusTTL = (status, index) => {\n      if (ttls[index]) {\n        const ttl = ttls[index]\n        const start = starts[index]\n        /* c8 ignore next */\n        if (!ttl || !start) return\n        status.ttl = ttl\n        status.start = start\n        status.now = cachedNow || getNow()\n        const age = status.now - start\n        status.remainingTTL = ttl - age\n      }\n    }\n\n    // debounce calls to perf.now() to 1s so we're not hitting\n    // that costly call repeatedly.\n    let cachedNow = 0\n    const getNow = () => {\n      const n = perf.now()\n      if (this.ttlResolution > 0) {\n        cachedNow = n\n        const t = setTimeout(\n          () => (cachedNow = 0),\n          this.ttlResolution\n        )\n        // not available on all platforms\n        /* c8 ignore start */\n        if (t.unref) {\n          t.unref()\n        }\n        /* c8 ignore stop */\n      }\n      return n\n    }\n\n    this.getRemainingTTL = key => {\n      const index = this.#keyMap.get(key)\n      if (index === undefined) {\n        return 0\n      }\n      const ttl = ttls[index]\n      const start = starts[index]\n      if (!ttl || !start) {\n        return Infinity\n      }\n      const age = (cachedNow || getNow()) - start\n      return ttl - age\n    }\n\n    this.#isStale = index => {\n      const s = starts[index]\n      const t = ttls[index]\n      return !!t && !!s && (cachedNow || getNow()) - s > t\n    }\n  }\n\n  // conditionally set private methods related to TTL\n  #updateItemAge: (index: Index) => void = () => {}\n  #statusTTL: (status: LRUCache.Status<V>, index: Index) => void =\n    () => {}\n  #setItemTTL: (\n    index: Index,\n    ttl: LRUCache.Milliseconds,\n    start?: LRUCache.Milliseconds\n    // ignore because we never call this if we're not already in TTL mode\n    /* c8 ignore start */\n  ) => void = () => {}\n  /* c8 ignore stop */\n\n  #isStale: (index: Index) => boolean = () => false\n\n  #initializeSizeTracking() {\n    const sizes = new ZeroArray(this.#max)\n    this.#calculatedSize = 0\n    this.#sizes = sizes\n    this.#removeItemSize = index => {\n      this.#calculatedSize -= sizes[index] as number\n      sizes[index] = 0\n    }\n    this.#requireSize = (k, v, size, sizeCalculation) => {\n      // provisionally accept background fetches.\n      // actual value size will be checked when they return.\n      if (this.#isBackgroundFetch(v)) {\n        return 0\n      }\n      if (!isPosInt(size)) {\n        if (sizeCalculation) {\n          if (typeof sizeCalculation !== 'function') {\n            throw new TypeError('sizeCalculation must be a function')\n          }\n          size = sizeCalculation(v, k)\n          if (!isPosInt(size)) {\n            throw new TypeError(\n              'sizeCalculation return invalid (expect positive integer)'\n            )\n          }\n        } else {\n          throw new TypeError(\n            'invalid size value (must be positive integer). ' +\n              'When maxSize or maxEntrySize is used, sizeCalculation ' +\n              'or size must be set.'\n          )\n        }\n      }\n      return size\n    }\n    this.#addItemSize = (\n      index: Index,\n      size: LRUCache.Size,\n      status?: LRUCache.Status<V>\n    ) => {\n      sizes[index] = size\n      if (this.#maxSize) {\n        const maxSize = this.#maxSize - (sizes[index] as number)\n        while (this.#calculatedSize > maxSize) {\n          this.#evict(true)\n        }\n      }\n      this.#calculatedSize += sizes[index] as number\n      if (status) {\n        status.entrySize = size\n        status.totalCalculatedSize = this.#calculatedSize\n      }\n    }\n  }\n\n  #removeItemSize: (index: Index) => void = _i => {}\n  #addItemSize: (\n    index: Index,\n    size: LRUCache.Size,\n    status?: LRUCache.Status<V>\n  ) => void = (_i, _s, _st) => {}\n  #requireSize: (\n    k: K,\n    v: V | BackgroundFetch<V>,\n    size?: LRUCache.Size,\n    sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  ) => LRUCache.Size = (\n    _k: K,\n    _v: V | BackgroundFetch<V>,\n    size?: LRUCache.Size,\n    sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  ) => {\n    if (size || sizeCalculation) {\n      throw new TypeError(\n        'cannot set size without setting maxSize or maxEntrySize on cache'\n      )\n    }\n    return 0\n  };\n\n  *#indexes({ allowStale = this.allowStale } = {}) {\n    if (this.#size) {\n      for (let i = this.#tail; true; ) {\n        if (!this.#isValidIndex(i)) {\n          break\n        }\n        if (allowStale || !this.#isStale(i)) {\n          yield i\n        }\n        if (i === this.#head) {\n          break\n        } else {\n          i = this.#prev[i] as Index\n        }\n      }\n    }\n  }\n\n  *#rindexes({ allowStale = this.allowStale } = {}) {\n    if (this.#size) {\n      for (let i = this.#head; true; ) {\n        if (!this.#isValidIndex(i)) {\n          break\n        }\n        if (allowStale || !this.#isStale(i)) {\n          yield i\n        }\n        if (i === this.#tail) {\n          break\n        } else {\n          i = this.#next[i] as Index\n        }\n      }\n    }\n  }\n\n  #isValidIndex(index: Index) {\n    return (\n      index !== undefined &&\n      this.#keyMap.get(this.#keyList[index] as K) === index\n    )\n  }\n\n  /**\n   * Return a generator yielding `[key, value]` pairs,\n   * in order from most recently used to least recently used.\n   */\n  *entries() {\n    for (const i of this.#indexes()) {\n      if (\n        this.#valList[i] !== undefined &&\n        this.#keyList[i] !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield [this.#keyList[i], this.#valList[i]] as [K, V]\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.entries}\n   *\n   * Return a generator yielding `[key, value]` pairs,\n   * in order from least recently used to most recently used.\n   */\n  *rentries() {\n    for (const i of this.#rindexes()) {\n      if (\n        this.#valList[i] !== undefined &&\n        this.#keyList[i] !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield [this.#keyList[i], this.#valList[i]]\n      }\n    }\n  }\n\n  /**\n   * Return a generator yielding the keys in the cache,\n   * in order from most recently used to least recently used.\n   */\n  *keys() {\n    for (const i of this.#indexes()) {\n      const k = this.#keyList[i]\n      if (\n        k !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield k\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.keys}\n   *\n   * Return a generator yielding the keys in the cache,\n   * in order from least recently used to most recently used.\n   */\n  *rkeys() {\n    for (const i of this.#rindexes()) {\n      const k = this.#keyList[i]\n      if (\n        k !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield k\n      }\n    }\n  }\n\n  /**\n   * Return a generator yielding the values in the cache,\n   * in order from most recently used to least recently used.\n   */\n  *values() {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      if (\n        v !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield this.#valList[i] as V\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.values}\n   *\n   * Return a generator yielding the values in the cache,\n   * in order from least recently used to most recently used.\n   */\n  *rvalues() {\n    for (const i of this.#rindexes()) {\n      const v = this.#valList[i]\n      if (\n        v !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield this.#valList[i]\n      }\n    }\n  }\n\n  /**\n   * Iterating over the cache itself yields the same results as\n   * {@link LRUCache.entries}\n   */\n  [Symbol.iterator]() {\n    return this.entries()\n  }\n\n  /**\n   * A String value that is used in the creation of the default string\n   * description of an object. Called by the built-in method\n   * `Object.prototype.toString`.\n   */\n  [Symbol.toStringTag] = 'LRUCache'\n\n  /**\n   * Find a value for which the supplied fn method returns a truthy value,\n   * similar to `Array.find()`. fn is called as `fn(value, key, cache)`.\n   */\n  find(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => boolean,\n    getOptions: LRUCache.GetOptions<K, V, FC> = {}\n  ) {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      if (fn(value, this.#keyList[i] as K, this)) {\n        return this.get(this.#keyList[i] as K, getOptions)\n      }\n    }\n  }\n\n  /**\n   * Call the supplied function on each item in the cache, in order from most\n   * recently used to least recently used.\n   *\n   * `fn` is called as `fn(value, key, cache)`.\n   *\n   * If `thisp` is provided, function will be called in the `this`-context of\n   * the provided object, or the cache if no `thisp` object is provided.\n   *\n   * Does not update age or recenty of use, or iterate over stale values.\n   */\n  forEach(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any,\n    thisp: any = this\n  ) {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      fn.call(thisp, value, this.#keyList[i] as K, this)\n    }\n  }\n\n  /**\n   * The same as {@link LRUCache.forEach} but items are iterated over in\n   * reverse order.  (ie, less recently used items are iterated over first.)\n   */\n  rforEach(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any,\n    thisp: any = this\n  ) {\n    for (const i of this.#rindexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      fn.call(thisp, value, this.#keyList[i] as K, this)\n    }\n  }\n\n  /**\n   * Delete any stale entries. Returns true if anything was removed,\n   * false otherwise.\n   */\n  purgeStale() {\n    let deleted = false\n    for (const i of this.#rindexes({ allowStale: true })) {\n      if (this.#isStale(i)) {\n        this.#delete(this.#keyList[i] as K, 'expire')\n        deleted = true\n      }\n    }\n    return deleted\n  }\n\n  /**\n   * Get the extended info about a given entry, to get its value, size, and\n   * TTL info simultaneously. Returns `undefined` if the key is not present.\n   *\n   * Unlike {@link LRUCache#dump}, which is designed to be portable and survive\n   * serialization, the `start` value is always the current timestamp, and the\n   * `ttl` is a calculated remaining time to live (negative if expired).\n   *\n   * Always returns stale values, if their info is found in the cache, so be\n   * sure to check for expirations (ie, a negative {@link LRUCache.Entry#ttl})\n   * if relevant.\n   */\n  info(key: K): LRUCache.Entry<V> | undefined {\n    const i = this.#keyMap.get(key)\n    if (i === undefined) return undefined\n    const v = this.#valList[i]\n    const value: V | undefined = this.#isBackgroundFetch(v)\n      ? v.__staleWhileFetching\n      : v\n    if (value === undefined) return undefined\n    const entry: LRUCache.Entry<V> = { value }\n    if (this.#ttls && this.#starts) {\n      const ttl = this.#ttls[i]\n      const start = this.#starts[i]\n      if (ttl && start) {\n        const remain = ttl - (perf.now() - start)\n        entry.ttl = remain\n        entry.start = Date.now()\n      }\n    }\n    if (this.#sizes) {\n      entry.size = this.#sizes[i]\n    }\n    return entry\n  }\n\n  /**\n   * Return an array of [key, {@link LRUCache.Entry}] tuples which can be\n   * passed to {@link LRLUCache#load}.\n   *\n   * The `start` fields are calculated relative to a portable `Date.now()`\n   * timestamp, even if `performance.now()` is available.\n   *\n   * Stale entries are always included in the `dump`, even if\n   * {@link LRUCache.OptionsBase.allowStale} is false.\n   *\n   * Note: this returns an actual array, not a generator, so it can be more\n   * easily passed around.\n   */\n  dump() {\n    const arr: [K, LRUCache.Entry<V>][] = []\n    for (const i of this.#indexes({ allowStale: true })) {\n      const key = this.#keyList[i]\n      const v = this.#valList[i]\n      const value: V | undefined = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined || key === undefined) continue\n      const entry: LRUCache.Entry<V> = { value }\n      if (this.#ttls && this.#starts) {\n        entry.ttl = this.#ttls[i]\n        // always dump the start relative to a portable timestamp\n        // it's ok for this to be a bit slow, it's a rare operation.\n        const age = perf.now() - (this.#starts[i] as number)\n        entry.start = Math.floor(Date.now() - age)\n      }\n      if (this.#sizes) {\n        entry.size = this.#sizes[i]\n      }\n      arr.unshift([key, entry])\n    }\n    return arr\n  }\n\n  /**\n   * Reset the cache and load in the items in entries in the order listed.\n   *\n   * The shape of the resulting cache may be different if the same options are\n   * not used in both caches.\n   *\n   * The `start` fields are assumed to be calculated relative to a portable\n   * `Date.now()` timestamp, even if `performance.now()` is available.\n   */\n  load(arr: [K, LRUCache.Entry<V>][]) {\n    this.clear()\n    for (const [key, entry] of arr) {\n      if (entry.start) {\n        // entry.start is a portable timestamp, but we may be using\n        // node's performance.now(), so calculate the offset, so that\n        // we get the intended remaining TTL, no matter how long it's\n        // been on ice.\n        //\n        // it's ok for this to be a bit slow, it's a rare operation.\n        const age = Date.now() - entry.start\n        entry.start = perf.now() - age\n      }\n      this.set(key, entry.value, entry)\n    }\n  }\n\n  /**\n   * Add a value to the cache.\n   *\n   * Note: if `undefined` is specified as a value, this is an alias for\n   * {@link LRUCache#delete}\n   *\n   * Fields on the {@link LRUCache.SetOptions} options param will override\n   * their corresponding values in the constructor options for the scope\n   * of this single `set()` operation.\n   *\n   * If `start` is provided, then that will set the effective start\n   * time for the TTL calculation. Note that this must be a previous\n   * value of `performance.now()` if supported, or a previous value of\n   * `Date.now()` if not.\n   *\n   * Options object may also include `size`, which will prevent\n   * calling the `sizeCalculation` function and just use the specified\n   * number if it is a positive integer, and `noDisposeOnSet` which\n   * will prevent calling a `dispose` function in the case of\n   * overwrites.\n   *\n   * If the `size` (or return value of `sizeCalculation`) for a given\n   * entry is greater than `maxEntrySize`, then the item will not be\n   * added to the cache.\n   *\n   * Will update the recency of the entry.\n   *\n   * If the value is `undefined`, then this is an alias for\n   * `cache.delete(key)`. `undefined` is never stored in the cache.\n   */\n  set(\n    k: K,\n    v: V | BackgroundFetch<V> | undefined,\n    setOptions: LRUCache.SetOptions<K, V, FC> = {}\n  ) {\n    if (v === undefined) {\n      this.delete(k)\n      return this\n    }\n    const {\n      ttl = this.ttl,\n      start,\n      noDisposeOnSet = this.noDisposeOnSet,\n      sizeCalculation = this.sizeCalculation,\n      status,\n    } = setOptions\n    let { noUpdateTTL = this.noUpdateTTL } = setOptions\n\n    const size = this.#requireSize(\n      k,\n      v,\n      setOptions.size || 0,\n      sizeCalculation\n    )\n    // if the item doesn't fit, don't do anything\n    // NB: maxEntrySize set to maxSize by default\n    if (this.maxEntrySize && size > this.maxEntrySize) {\n      if (status) {\n        status.set = 'miss'\n        status.maxEntrySizeExceeded = true\n      }\n      // have to delete, in case something is there already.\n      this.#delete(k, 'set')\n      return this\n    }\n    let index = this.#size === 0 ? undefined : this.#keyMap.get(k)\n    if (index === undefined) {\n      // addition\n      index = (\n        this.#size === 0\n          ? this.#tail\n          : this.#free.length !== 0\n          ? this.#free.pop()\n          : this.#size === this.#max\n          ? this.#evict(false)\n          : this.#size\n      ) as Index\n      this.#keyList[index] = k\n      this.#valList[index] = v\n      this.#keyMap.set(k, index)\n      this.#next[this.#tail] = index\n      this.#prev[index] = this.#tail\n      this.#tail = index\n      this.#size++\n      this.#addItemSize(index, size, status)\n      if (status) status.set = 'add'\n      noUpdateTTL = false\n    } else {\n      // update\n      this.#moveToTail(index)\n      const oldVal = this.#valList[index] as V | BackgroundFetch<V>\n      if (v !== oldVal) {\n        if (this.#hasFetchMethod && this.#isBackgroundFetch(oldVal)) {\n          oldVal.__abortController.abort(new Error('replaced'))\n          const { __staleWhileFetching: s } = oldVal\n          if (s !== undefined && !noDisposeOnSet) {\n            if (this.#hasDispose) {\n              this.#dispose?.(s as V, k, 'set')\n            }\n            if (this.#hasDisposeAfter) {\n              this.#disposed?.push([s as V, k, 'set'])\n            }\n          }\n        } else if (!noDisposeOnSet) {\n          if (this.#hasDispose) {\n            this.#dispose?.(oldVal as V, k, 'set')\n          }\n          if (this.#hasDisposeAfter) {\n            this.#disposed?.push([oldVal as V, k, 'set'])\n          }\n        }\n        this.#removeItemSize(index)\n        this.#addItemSize(index, size, status)\n        this.#valList[index] = v\n        if (status) {\n          status.set = 'replace'\n          const oldValue =\n            oldVal && this.#isBackgroundFetch(oldVal)\n              ? oldVal.__staleWhileFetching\n              : oldVal\n          if (oldValue !== undefined) status.oldValue = oldValue\n        }\n      } else if (status) {\n        status.set = 'update'\n      }\n    }\n    if (ttl !== 0 && !this.#ttls) {\n      this.#initializeTTLTracking()\n    }\n    if (this.#ttls) {\n      if (!noUpdateTTL) {\n        this.#setItemTTL(index, ttl, start)\n      }\n      if (status) this.#statusTTL(status, index)\n    }\n    if (!noDisposeOnSet && this.#hasDisposeAfter && this.#disposed) {\n      const dt = this.#disposed\n      let task: DisposeTask<K, V> | undefined\n      while ((task = dt?.shift())) {\n        this.#disposeAfter?.(...task)\n      }\n    }\n    return this\n  }\n\n  /**\n   * Evict the least recently used item, returning its value or\n   * `undefined` if cache is empty.\n   */\n  pop(): V | undefined {\n    try {\n      while (this.#size) {\n        const val = this.#valList[this.#head]\n        this.#evict(true)\n        if (this.#isBackgroundFetch(val)) {\n          if (val.__staleWhileFetching) {\n            return val.__staleWhileFetching\n          }\n        } else if (val !== undefined) {\n          return val\n        }\n      }\n    } finally {\n      if (this.#hasDisposeAfter && this.#disposed) {\n        const dt = this.#disposed\n        let task: DisposeTask<K, V> | undefined\n        while ((task = dt?.shift())) {\n          this.#disposeAfter?.(...task)\n        }\n      }\n    }\n  }\n\n  #evict(free: boolean) {\n    const head = this.#head\n    const k = this.#keyList[head] as K\n    const v = this.#valList[head] as V\n    if (this.#hasFetchMethod && this.#isBackgroundFetch(v)) {\n      v.__abortController.abort(new Error('evicted'))\n    } else if (this.#hasDispose || this.#hasDisposeAfter) {\n      if (this.#hasDispose) {\n        this.#dispose?.(v, k, 'evict')\n      }\n      if (this.#hasDisposeAfter) {\n        this.#disposed?.push([v, k, 'evict'])\n      }\n    }\n    this.#removeItemSize(head)\n    // if we aren't about to use the index, then null these out\n    if (free) {\n      this.#keyList[head] = undefined\n      this.#valList[head] = undefined\n      this.#free.push(head)\n    }\n    if (this.#size === 1) {\n      this.#head = this.#tail = 0 as Index\n      this.#free.length = 0\n    } else {\n      this.#head = this.#next[head] as Index\n    }\n    this.#keyMap.delete(k)\n    this.#size--\n    return head\n  }\n\n  /**\n   * Check if a key is in the cache, without updating the recency of use.\n   * Will return false if the item is stale, even though it is technically\n   * in the cache.\n   *\n   * Check if a key is in the cache, without updating the recency of\n   * use. Age is updated if {@link LRUCache.OptionsBase.updateAgeOnHas} is set\n   * to `true` in either the options or the constructor.\n   *\n   * Will return `false` if the item is stale, even though it is technically in\n   * the cache. The difference can be determined (if it matters) by using a\n   * `status` argument, and inspecting the `has` field.\n   *\n   * Will not update item age unless\n   * {@link LRUCache.OptionsBase.updateAgeOnHas} is set.\n   */\n  has(k: K, hasOptions: LRUCache.HasOptions<K, V, FC> = {}) {\n    const { updateAgeOnHas = this.updateAgeOnHas, status } =\n      hasOptions\n    const index = this.#keyMap.get(k)\n    if (index !== undefined) {\n      const v = this.#valList[index]\n      if (\n        this.#isBackgroundFetch(v) &&\n        v.__staleWhileFetching === undefined\n      ) {\n        return false\n      }\n      if (!this.#isStale(index)) {\n        if (updateAgeOnHas) {\n          this.#updateItemAge(index)\n        }\n        if (status) {\n          status.has = 'hit'\n          this.#statusTTL(status, index)\n        }\n        return true\n      } else if (status) {\n        status.has = 'stale'\n        this.#statusTTL(status, index)\n      }\n    } else if (status) {\n      status.has = 'miss'\n    }\n    return false\n  }\n\n  /**\n   * Like {@link LRUCache#get} but doesn't update recency or delete stale\n   * items.\n   *\n   * Returns `undefined` if the item is stale, unless\n   * {@link LRUCache.OptionsBase.allowStale} is set.\n   */\n  peek(k: K, peekOptions: LRUCache.PeekOptions<K, V, FC> = {}) {\n    const { allowStale = this.allowStale } = peekOptions\n    const index = this.#keyMap.get(k)\n    if (\n      index === undefined ||\n      (!allowStale && this.#isStale(index))\n    ) {\n      return\n    }\n    const v = this.#valList[index]\n    // either stale and allowed, or forcing a refresh of non-stale value\n    return this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v\n  }\n\n  #backgroundFetch(\n    k: K,\n    index: Index | undefined,\n    options: LRUCache.FetchOptions<K, V, FC>,\n    context: any\n  ): BackgroundFetch<V> {\n    const v = index === undefined ? undefined : this.#valList[index]\n    if (this.#isBackgroundFetch(v)) {\n      return v\n    }\n\n    const ac = new AC()\n    const { signal } = options\n    // when/if our AC signals, then stop listening to theirs.\n    signal?.addEventListener('abort', () => ac.abort(signal.reason), {\n      signal: ac.signal,\n    })\n\n    const fetchOpts = {\n      signal: ac.signal,\n      options,\n      context,\n    }\n\n    const cb = (\n      v: V | undefined,\n      updateCache = false\n    ): V | undefined => {\n      const { aborted } = ac.signal\n      const ignoreAbort = options.ignoreFetchAbort && v !== undefined\n      if (options.status) {\n        if (aborted && !updateCache) {\n          options.status.fetchAborted = true\n          options.status.fetchError = ac.signal.reason\n          if (ignoreAbort) options.status.fetchAbortIgnored = true\n        } else {\n          options.status.fetchResolved = true\n        }\n      }\n      if (aborted && !ignoreAbort && !updateCache) {\n        return fetchFail(ac.signal.reason)\n      }\n      // either we didn't abort, and are still here, or we did, and ignored\n      const bf = p as BackgroundFetch<V>\n      if (this.#valList[index as Index] === p) {\n        if (v === undefined) {\n          if (bf.__staleWhileFetching) {\n            this.#valList[index as Index] = bf.__staleWhileFetching\n          } else {\n            this.#delete(k, 'fetch')\n          }\n        } else {\n          if (options.status) options.status.fetchUpdated = true\n          this.set(k, v, fetchOpts.options)\n        }\n      }\n      return v\n    }\n\n    const eb = (er: any) => {\n      if (options.status) {\n        options.status.fetchRejected = true\n        options.status.fetchError = er\n      }\n      return fetchFail(er)\n    }\n\n    const fetchFail = (er: any): V | undefined => {\n      const { aborted } = ac.signal\n      const allowStaleAborted =\n        aborted && options.allowStaleOnFetchAbort\n      const allowStale =\n        allowStaleAborted || options.allowStaleOnFetchRejection\n      const noDelete = allowStale || options.noDeleteOnFetchRejection\n      const bf = p as BackgroundFetch<V>\n      if (this.#valList[index as Index] === p) {\n        // if we allow stale on fetch rejections, then we need to ensure that\n        // the stale value is not removed from the cache when the fetch fails.\n        const del = !noDelete || bf.__staleWhileFetching === undefined\n        if (del) {\n          this.#delete(k, 'fetch')\n        } else if (!allowStaleAborted) {\n          // still replace the *promise* with the stale value,\n          // since we are done with the promise at this point.\n          // leave it untouched if we're still waiting for an\n          // aborted background fetch that hasn't yet returned.\n          this.#valList[index as Index] = bf.__staleWhileFetching\n        }\n      }\n      if (allowStale) {\n        if (options.status && bf.__staleWhileFetching !== undefined) {\n          options.status.returnedStale = true\n        }\n        return bf.__staleWhileFetching\n      } else if (bf.__returned === bf) {\n        throw er\n      }\n    }\n\n    const pcall = (\n      res: (v: V | undefined) => void,\n      rej: (e: any) => void\n    ) => {\n      const fmp = this.#fetchMethod?.(k, v, fetchOpts)\n      if (fmp && fmp instanceof Promise) {\n        fmp.then(v => res(v === undefined ? undefined : v), rej)\n      }\n      // ignored, we go until we finish, regardless.\n      // defer check until we are actually aborting,\n      // so fetchMethod can override.\n      ac.signal.addEventListener('abort', () => {\n        if (\n          !options.ignoreFetchAbort ||\n          options.allowStaleOnFetchAbort\n        ) {\n          res(undefined)\n          // when it eventually resolves, update the cache.\n          if (options.allowStaleOnFetchAbort) {\n            res = v => cb(v, true)\n          }\n        }\n      })\n    }\n\n    if (options.status) options.status.fetchDispatched = true\n    const p = new Promise(pcall).then(cb, eb)\n    const bf: BackgroundFetch<V> = Object.assign(p, {\n      __abortController: ac,\n      __staleWhileFetching: v,\n      __returned: undefined,\n    })\n\n    if (index === undefined) {\n      // internal, don't expose status.\n      this.set(k, bf, { ...fetchOpts.options, status: undefined })\n      index = this.#keyMap.get(k)\n    } else {\n      this.#valList[index] = bf\n    }\n    return bf\n  }\n\n  #isBackgroundFetch(p: any): p is BackgroundFetch<V> {\n    if (!this.#hasFetchMethod) return false\n    const b = p as BackgroundFetch<V>\n    return (\n      !!b &&\n      b instanceof Promise &&\n      b.hasOwnProperty('__staleWhileFetching') &&\n      b.__abortController instanceof AC\n    )\n  }\n\n  /**\n   * Make an asynchronous cached fetch using the\n   * {@link LRUCache.OptionsBase.fetchMethod} function.\n   *\n   * If the value is in the cache and not stale, then the returned\n   * Promise resolves to the value.\n   *\n   * If not in the cache, or beyond its TTL staleness, then\n   * `fetchMethod(key, staleValue, { options, signal, context })` is\n   * called, and the value returned will be added to the cache once\n   * resolved.\n   *\n   * If called with `allowStale`, and an asynchronous fetch is\n   * currently in progress to reload a stale value, then the former\n   * stale value will be returned.\n   *\n   * If called with `forceRefresh`, then the cached item will be\n   * re-fetched, even if it is not stale. However, if `allowStale` is also\n   * set, then the old value will still be returned. This is useful\n   * in cases where you want to force a reload of a cached value. If\n   * a background fetch is already in progress, then `forceRefresh`\n   * has no effect.\n   *\n   * If multiple fetches for the same key are issued, then they will all be\n   * coalesced into a single call to fetchMethod.\n   *\n   * Note that this means that handling options such as\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort},\n   * {@link LRUCache.FetchOptions.signal},\n   * and {@link LRUCache.OptionsBase.allowStaleOnFetchRejection} will be\n   * determined by the FIRST fetch() call for a given key.\n   *\n   * This is a known (fixable) shortcoming which will be addresed on when\n   * someone complains about it, as the fix would involve added complexity and\n   * may not be worth the costs for this edge case.\n   *\n   * If {@link LRUCache.OptionsBase.fetchMethod} is not specified, then this is\n   * effectively an alias for `Promise.resolve(cache.get(key))`.\n   *\n   * When the fetch method resolves to a value, if the fetch has not\n   * been aborted due to deletion, eviction, or being overwritten,\n   * then it is added to the cache using the options provided.\n   *\n   * If the key is evicted or deleted before the `fetchMethod`\n   * resolves, then the AbortSignal passed to the `fetchMethod` will\n   * receive an `abort` event, and the promise returned by `fetch()`\n   * will reject with the reason for the abort.\n   *\n   * If a `signal` is passed to the `fetch()` call, then aborting the\n   * signal will abort the fetch and cause the `fetch()` promise to\n   * reject with the reason provided.\n   *\n   * **Setting `context`**\n   *\n   * If an `FC` type is set to a type other than `unknown`, `void`, or\n   * `undefined` in the {@link LRUCache} constructor, then all\n   * calls to `cache.fetch()` _must_ provide a `context` option. If\n   * set to `undefined` or `void`, then calls to fetch _must not_\n   * provide a `context` option.\n   *\n   * The `context` param allows you to provide arbitrary data that\n   * might be relevant in the course of fetching the data. It is only\n   * relevant for the course of a single `fetch()` operation, and\n   * discarded afterwards.\n   *\n   * **Note: `fetch()` calls are inflight-unique**\n   *\n   * If you call `fetch()` multiple times with the same key value,\n   * then every call after the first will resolve on the same\n   * promise<sup>1</sup>,\n   * _even if they have different settings that would otherwise change\n   * the behavior of the fetch_, such as `noDeleteOnFetchRejection`\n   * or `ignoreFetchAbort`.\n   *\n   * In most cases, this is not a problem (in fact, only fetching\n   * something once is what you probably want, if you're caching in\n   * the first place). If you are changing the fetch() options\n   * dramatically between runs, there's a good chance that you might\n   * be trying to fit divergent semantics into a single object, and\n   * would be better off with multiple cache instances.\n   *\n   * **1**: Ie, they're not the \"same Promise\", but they resolve at\n   * the same time, because they're both waiting on the same\n   * underlying fetchMethod response.\n   */\n\n  fetch(\n    k: K,\n    fetchOptions: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : LRUCache.FetchOptionsWithContext<K, V, FC>\n  ): Promise<undefined | V>\n\n  // this overload not allowed if context is required\n  fetch(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    fetchOptions?: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : never\n  ): Promise<undefined | V>\n\n  async fetch(\n    k: K,\n    fetchOptions: LRUCache.FetchOptions<K, V, FC> = {}\n  ): Promise<undefined | V> {\n    const {\n      // get options\n      allowStale = this.allowStale,\n      updateAgeOnGet = this.updateAgeOnGet,\n      noDeleteOnStaleGet = this.noDeleteOnStaleGet,\n      // set options\n      ttl = this.ttl,\n      noDisposeOnSet = this.noDisposeOnSet,\n      size = 0,\n      sizeCalculation = this.sizeCalculation,\n      noUpdateTTL = this.noUpdateTTL,\n      // fetch exclusive options\n      noDeleteOnFetchRejection = this.noDeleteOnFetchRejection,\n      allowStaleOnFetchRejection = this.allowStaleOnFetchRejection,\n      ignoreFetchAbort = this.ignoreFetchAbort,\n      allowStaleOnFetchAbort = this.allowStaleOnFetchAbort,\n      context,\n      forceRefresh = false,\n      status,\n      signal,\n    } = fetchOptions\n\n    if (!this.#hasFetchMethod) {\n      if (status) status.fetch = 'get'\n      return this.get(k, {\n        allowStale,\n        updateAgeOnGet,\n        noDeleteOnStaleGet,\n        status,\n      })\n    }\n\n    const options = {\n      allowStale,\n      updateAgeOnGet,\n      noDeleteOnStaleGet,\n      ttl,\n      noDisposeOnSet,\n      size,\n      sizeCalculation,\n      noUpdateTTL,\n      noDeleteOnFetchRejection,\n      allowStaleOnFetchRejection,\n      allowStaleOnFetchAbort,\n      ignoreFetchAbort,\n      status,\n      signal,\n    }\n\n    let index = this.#keyMap.get(k)\n    if (index === undefined) {\n      if (status) status.fetch = 'miss'\n      const p = this.#backgroundFetch(k, index, options, context)\n      return (p.__returned = p)\n    } else {\n      // in cache, maybe already fetching\n      const v = this.#valList[index]\n      if (this.#isBackgroundFetch(v)) {\n        const stale =\n          allowStale && v.__staleWhileFetching !== undefined\n        if (status) {\n          status.fetch = 'inflight'\n          if (stale) status.returnedStale = true\n        }\n        return stale ? v.__staleWhileFetching : (v.__returned = v)\n      }\n\n      // if we force a refresh, that means do NOT serve the cached value,\n      // unless we are already in the process of refreshing the cache.\n      const isStale = this.#isStale(index)\n      if (!forceRefresh && !isStale) {\n        if (status) status.fetch = 'hit'\n        this.#moveToTail(index)\n        if (updateAgeOnGet) {\n          this.#updateItemAge(index)\n        }\n        if (status) this.#statusTTL(status, index)\n        return v\n      }\n\n      // ok, it is stale or a forced refresh, and not already fetching.\n      // refresh the cache.\n      const p = this.#backgroundFetch(k, index, options, context)\n      const hasStale = p.__staleWhileFetching !== undefined\n      const staleVal = hasStale && allowStale\n      if (status) {\n        status.fetch = isStale ? 'stale' : 'refresh'\n        if (staleVal && isStale) status.returnedStale = true\n      }\n      return staleVal ? p.__staleWhileFetching : (p.__returned = p)\n    }\n  }\n\n  /**\n   * In some cases, `cache.fetch()` may resolve to `undefined`, either because\n   * a {@link LRUCache.OptionsBase#fetchMethod} was not provided (turning\n   * `cache.fetch(k)` into just an async wrapper around `cache.get(k)`) or\n   * because `ignoreFetchAbort` was specified (either to the constructor or\n   * in the {@link LRUCache.FetchOptions}). Also, the\n   * {@link OptionsBase.fetchMethod} may return `undefined` or `void`, making\n   * the test even more complicated.\n   *\n   * Because inferring the cases where `undefined` might be returned are so\n   * cumbersome, but testing for `undefined` can also be annoying, this method\n   * can be used, which will reject if `this.fetch()` resolves to undefined.\n   */\n  forceFetch(\n    k: K,\n    fetchOptions: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : LRUCache.FetchOptionsWithContext<K, V, FC>\n  ): Promise<V>\n  // this overload not allowed if context is required\n  forceFetch(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    fetchOptions?: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : never\n  ): Promise<V>\n  async forceFetch(\n    k: K,\n    fetchOptions: LRUCache.FetchOptions<K, V, FC> = {}\n  ): Promise<V> {\n    const v = await this.fetch(\n      k,\n      fetchOptions as unknown extends FC\n        ? LRUCache.FetchOptions<K, V, FC>\n        : FC extends undefined | void\n        ? LRUCache.FetchOptionsNoContext<K, V>\n        : LRUCache.FetchOptionsWithContext<K, V, FC>\n    )\n    if (v === undefined) throw new Error('fetch() returned undefined')\n    return v\n  }\n\n  /**\n   * If the key is found in the cache, then this is equivalent to\n   * {@link LRUCache#get}. If not, in the cache, then calculate the value using\n   * the {@link LRUCache.OptionsBase.memoMethod}, and add it to the cache.\n   *\n   * If an `FC` type is set to a type other than `unknown`, `void`, or\n   * `undefined` in the LRUCache constructor, then all calls to `cache.memo()`\n   * _must_ provide a `context` option. If set to `undefined` or `void`, then\n   * calls to memo _must not_ provide a `context` option.\n   *\n   * The `context` param allows you to provide arbitrary data that might be\n   * relevant in the course of fetching the data. It is only relevant for the\n   * course of a single `memo()` operation, and discarded afterwards.\n   */\n  memo(\n    k: K,\n    memoOptions: unknown extends FC\n      ? LRUCache.MemoOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.MemoOptionsNoContext<K, V>\n      : LRUCache.MemoOptionsWithContext<K, V, FC>\n  ): V\n  // this overload not allowed if context is required\n  memo(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    memoOptions?: unknown extends FC\n      ? LRUCache.MemoOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.MemoOptionsNoContext<K, V>\n      : never\n  ): V\n  memo(k: K, memoOptions: LRUCache.MemoOptions<K, V, FC> = {}) {\n    const memoMethod = this.#memoMethod\n    if (!memoMethod) {\n      throw new Error('no memoMethod provided to constructor')\n    }\n    const { context, forceRefresh, ...options } = memoOptions\n    const v = this.get(k, options)\n    if (!forceRefresh && v !== undefined) return v\n    const vv = memoMethod(k, v, {\n      options,\n      context,\n    } as LRUCache.MemoizerOptions<K, V, FC>)\n    this.set(k, vv, options)\n    return vv\n  }\n\n  /**\n   * Return a value from the cache. Will update the recency of the cache\n   * entry found.\n   *\n   * If the key is not found, get() will return `undefined`.\n   */\n  get(k: K, getOptions: LRUCache.GetOptions<K, V, FC> = {}) {\n    const {\n      allowStale = this.allowStale,\n      updateAgeOnGet = this.updateAgeOnGet,\n      noDeleteOnStaleGet = this.noDeleteOnStaleGet,\n      status,\n    } = getOptions\n    const index = this.#keyMap.get(k)\n    if (index !== undefined) {\n      const value = this.#valList[index]\n      const fetching = this.#isBackgroundFetch(value)\n      if (status) this.#statusTTL(status, index)\n      if (this.#isStale(index)) {\n        if (status) status.get = 'stale'\n        // delete only if not an in-flight background fetch\n        if (!fetching) {\n          if (!noDeleteOnStaleGet) {\n            this.#delete(k, 'expire')\n          }\n          if (status && allowStale) status.returnedStale = true\n          return allowStale ? value : undefined\n        } else {\n          if (\n            status &&\n            allowStale &&\n            value.__staleWhileFetching !== undefined\n          ) {\n            status.returnedStale = true\n          }\n          return allowStale ? value.__staleWhileFetching : undefined\n        }\n      } else {\n        if (status) status.get = 'hit'\n        // if we're currently fetching it, we don't actually have it yet\n        // it's not stale, which means this isn't a staleWhileRefetching.\n        // If it's not stale, and fetching, AND has a __staleWhileFetching\n        // value, then that means the user fetched with {forceRefresh:true},\n        // so it's safe to return that value.\n        if (fetching) {\n          return value.__staleWhileFetching\n        }\n        this.#moveToTail(index)\n        if (updateAgeOnGet) {\n          this.#updateItemAge(index)\n        }\n        return value\n      }\n    } else if (status) {\n      status.get = 'miss'\n    }\n  }\n\n  #connect(p: Index, n: Index) {\n    this.#prev[n] = p\n    this.#next[p] = n\n  }\n\n  #moveToTail(index: Index): void {\n    // if tail already, nothing to do\n    // if head, move head to next[index]\n    // else\n    //   move next[prev[index]] to next[index] (head has no prev)\n    //   move prev[next[index]] to prev[index]\n    // prev[index] = tail\n    // next[tail] = index\n    // tail = index\n    if (index !== this.#tail) {\n      if (index === this.#head) {\n        this.#head = this.#next[index] as Index\n      } else {\n        this.#connect(\n          this.#prev[index] as Index,\n          this.#next[index] as Index\n        )\n      }\n      this.#connect(this.#tail, index)\n      this.#tail = index\n    }\n  }\n\n  /**\n   * Deletes a key out of the cache.\n   *\n   * Returns true if the key was deleted, false otherwise.\n   */\n  delete(k: K) {\n    return this.#delete(k, 'delete')\n  }\n\n  #delete(k: K, reason: LRUCache.DisposeReason) {\n    let deleted = false\n    if (this.#size !== 0) {\n      const index = this.#keyMap.get(k)\n      if (index !== undefined) {\n        deleted = true\n        if (this.#size === 1) {\n          this.#clear(reason)\n        } else {\n          this.#removeItemSize(index)\n          const v = this.#valList[index]\n          if (this.#isBackgroundFetch(v)) {\n            v.__abortController.abort(new Error('deleted'))\n          } else if (this.#hasDispose || this.#hasDisposeAfter) {\n            if (this.#hasDispose) {\n              this.#dispose?.(v as V, k, reason)\n            }\n            if (this.#hasDisposeAfter) {\n              this.#disposed?.push([v as V, k, reason])\n            }\n          }\n          this.#keyMap.delete(k)\n          this.#keyList[index] = undefined\n          this.#valList[index] = undefined\n          if (index === this.#tail) {\n            this.#tail = this.#prev[index] as Index\n          } else if (index === this.#head) {\n            this.#head = this.#next[index] as Index\n          } else {\n            const pi = this.#prev[index] as number\n            this.#next[pi] = this.#next[index] as number\n            const ni = this.#next[index] as number\n            this.#prev[ni] = this.#prev[index] as number\n          }\n          this.#size--\n          this.#free.push(index)\n        }\n      }\n    }\n    if (this.#hasDisposeAfter && this.#disposed?.length) {\n      const dt = this.#disposed\n      let task: DisposeTask<K, V> | undefined\n      while ((task = dt?.shift())) {\n        this.#disposeAfter?.(...task)\n      }\n    }\n    return deleted\n  }\n\n  /**\n   * Clear the cache entirely, throwing away all values.\n   */\n  clear() {\n    return this.#clear('delete')\n  }\n  #clear(reason: LRUCache.DisposeReason) {\n    for (const index of this.#rindexes({ allowStale: true })) {\n      const v = this.#valList[index]\n      if (this.#isBackgroundFetch(v)) {\n        v.__abortController.abort(new Error('deleted'))\n      } else {\n        const k = this.#keyList[index]\n        if (this.#hasDispose) {\n          this.#dispose?.(v as V, k as K, reason)\n        }\n        if (this.#hasDisposeAfter) {\n          this.#disposed?.push([v as V, k as K, reason])\n        }\n      }\n    }\n\n    this.#keyMap.clear()\n    this.#valList.fill(undefined)\n    this.#keyList.fill(undefined)\n    if (this.#ttls && this.#starts) {\n      this.#ttls.fill(0)\n      this.#starts.fill(0)\n    }\n    if (this.#sizes) {\n      this.#sizes.fill(0)\n    }\n    this.#head = 0 as Index\n    this.#tail = 0 as Index\n    this.#free.length = 0\n    this.#calculatedSize = 0\n    this.#size = 0\n    if (this.#hasDisposeAfter && this.#disposed) {\n      const dt = this.#disposed\n      let task: DisposeTask<K, V> | undefined\n      while ((task = dt?.shift())) {\n        this.#disposeAfter?.(...task)\n      }\n    }\n  }\n}\n"]}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/lru-cache/dist/esm/index.min.js b/mqtt-backend/node_modules/lru-cache/dist/esm/index.min.js
new file mode 100644
index 0000000..4571d02
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/esm/index.min.js
@@ -0,0 +1,2 @@
+var G=(l,t,e)=>{if(!t.has(l))throw TypeError("Cannot "+e)};var I=(l,t,e)=>(G(l,t,"read from private field"),e?e.call(l):t.get(l)),j=(l,t,e)=>{if(t.has(l))throw TypeError("Cannot add the same private member more than once");t instanceof WeakSet?t.add(l):t.set(l,e)},x=(l,t,e,i)=>(G(l,t,"write to private field"),i?i.call(l,e):t.set(l,e),e);var T=typeof performance=="object"&&performance&&typeof performance.now=="function"?performance:Date,P=new Set,M=typeof process=="object"&&process?process:{},H=(l,t,e,i)=>{typeof M.emitWarning=="function"?M.emitWarning(l,t,e,i):console.error(`[${e}] ${t}: ${l}`)},W=globalThis.AbortController,N=globalThis.AbortSignal;if(typeof W>"u"){N=class{onabort;_onabort=[];reason;aborted=!1;addEventListener(i,s){this._onabort.push(s)}},W=class{constructor(){t()}signal=new N;abort(i){if(!this.signal.aborted){this.signal.reason=i,this.signal.aborted=!0;for(let s of this.signal._onabort)s(i);this.signal.onabort?.(i)}}};let l=M.env?.LRU_CACHE_IGNORE_AC_WARNING!=="1",t=()=>{l&&(l=!1,H("AbortController is not defined. If using lru-cache in node 14, load an AbortController polyfill from the `node-abort-controller` package. A minimal polyfill is provided for use by LRUCache.fetch(), but it should not be relied upon in other contexts (eg, passing it to other APIs that use AbortController/AbortSignal might have undesirable effects). 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b={allowStale:i,updateAgeOnGet:s,noDeleteOnStaleGet:n,ttl:h,noDisposeOnSet:o,size:r,sizeCalculation:g,noUpdateTTL:m,noDeleteOnFetchRejection:f,allowStaleOnFetchRejection:u,allowStaleOnFetchAbort:F,ignoreFetchAbort:c,status:a,signal:w},p=this.#s.get(t);if(p===void 0){a&&(a.fetch="miss");let _=this.#x(t,p,b,d);return _.__returned=_}else{let _=this.#t[p];if(this.#e(_)){let U=i&&_.__staleWhileFetching!==void 0;return a&&(a.fetch="inflight",U&&(a.returnedStale=!0)),U?_.__staleWhileFetching:_.__returned=_}let v=this.#d(p);if(!S&&!v)return a&&(a.fetch="hit"),this.#C(p),s&&this.#z(p),a&&this.#E(a,p),_;let y=this.#x(t,p,b,d),L=y.__staleWhileFetching!==void 0&&i;return a&&(a.fetch=v?"stale":"refresh",L&&v&&(a.returnedStale=!0)),L?y.__staleWhileFetching:y.__returned=y}}async forceFetch(t,e={}){let i=await this.fetch(t,e);if(i===void 0)throw new Error("fetch() returned undefined");return i}memo(t,e={}){let i=this.#W;if(!i)throw new Error("no memoMethod provided to constructor");let{context:s,forceRefresh:n,...h}=e,o=this.get(t,h);if(!n&&o!==void 0)return o;let r=i(t,o,{options:h,context:s});return this.set(t,r,h),r}get(t,e={}){let{allowStale:i=this.allowStale,updateAgeOnGet:s=this.updateAgeOnGet,noDeleteOnStaleGet:n=this.noDeleteOnStaleGet,status:h}=e,o=this.#s.get(t);if(o!==void 0){let r=this.#t[o],g=this.#e(r);return h&&this.#E(h,o),this.#d(o)?(h&&(h.get="stale"),g?(h&&i&&r.__staleWhileFetching!==void 0&&(h.returnedStale=!0),i?r.__staleWhileFetching:void 0):(n||this.#T(t,"expire"),h&&i&&(h.returnedStale=!0),i?r:void 0)):(h&&(h.get="hit"),g?r.__staleWhileFetching:(this.#C(o),s&&this.#z(o),r))}else h&&(h.get="miss")}#j(t,e){this.#c[e]=t,this.#l[t]=e}#C(t){t!==this.#h&&(t===this.#o?this.#o=this.#l[t]:this.#j(this.#c[t],this.#l[t]),this.#j(this.#h,t),this.#h=t)}delete(t){return this.#T(t,"delete")}#T(t,e){let i=!1;if(this.#n!==0){let s=this.#s.get(t);if(s!==void 0)if(i=!0,this.#n===1)this.#N(e);else{this.#v(s);let n=this.#t[s];if(this.#e(n)?n.__abortController.abort(new Error("deleted")):(this.#y||this.#a)&&(this.#y&&this.#p?.(n,t,e),this.#a&&this.#r?.push([n,t,e])),this.#s.delete(t),this.#i[s]=void 0,this.#t[s]=void 0,s===this.#h)this.#h=this.#c[s];else if(s===this.#o)this.#o=this.#l[s];else{let h=this.#c[s];this.#l[h]=this.#l[s];let o=this.#l[s];this.#c[o]=this.#c[s]}this.#n--,this.#_.push(s)}}if(this.#a&&this.#r?.length){let s=this.#r,n;for(;n=s?.shift();)this.#w?.(...n)}return i}clear(){return this.#N("delete")}#N(t){for(let e of this.#F({allowStale:!0})){let i=this.#t[e];if(this.#e(i))i.__abortController.abort(new Error("deleted"));else{let s=this.#i[e];this.#y&&this.#p?.(i,s,t),this.#a&&this.#r?.push([i,s,t])}}if(this.#s.clear(),this.#t.fill(void 0),this.#i.fill(void 0),this.#u&&this.#b&&(this.#u.fill(0),this.#b.fill(0)),this.#m&&this.#m.fill(0),this.#o=0,this.#h=0,this.#_.length=0,this.#S=0,this.#n=0,this.#a&&this.#r){let e=this.#r,i;for(;i=e?.shift();)this.#w?.(...i)}}};export{D as LRUCache};
+//# sourceMappingURL=index.min.js.map
diff --git a/mqtt-backend/node_modules/lru-cache/dist/esm/index.min.js.map b/mqtt-backend/node_modules/lru-cache/dist/esm/index.min.js.map
new file mode 100644
index 0000000..117a9de
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/esm/index.min.js.map
@@ -0,0 +1,7 @@
+{
+  "version": 3,
+  "sources": ["../../src/index.ts"],
+  "sourcesContent": ["/**\n * @module LRUCache\n */\n\n// module-private names and types\ntype Perf = { now: () => number }\nconst perf: Perf =\n  typeof performance === 'object' &&\n  performance &&\n  typeof performance.now === 'function'\n    ? performance\n    : Date\n\nconst warned = new Set<string>()\n\n// either a function or a class\ntype ForC = ((...a: any[]) => any) | { new (...a: any[]): any }\n\n/* c8 ignore start */\nconst PROCESS = (\n  typeof process === 'object' && !!process ? process : {}\n) as { [k: string]: any }\n/* c8 ignore start */\n\nconst emitWarning = (\n  msg: string,\n  type: string,\n  code: string,\n  fn: ForC\n) => {\n  typeof PROCESS.emitWarning === 'function'\n    ? PROCESS.emitWarning(msg, type, code, fn)\n    : console.error(`[${code}] ${type}: ${msg}`)\n}\n\nlet AC = globalThis.AbortController\nlet AS = globalThis.AbortSignal\n\n/* c8 ignore start */\nif (typeof AC === 'undefined') {\n  //@ts-ignore\n  AS = class AbortSignal {\n    onabort?: (...a: any[]) => any\n    _onabort: ((...a: any[]) => any)[] = []\n    reason?: any\n    aborted: boolean = false\n    addEventListener(_: string, fn: (...a: any[]) => any) {\n      this._onabort.push(fn)\n    }\n  }\n  //@ts-ignore\n  AC = class AbortController {\n    constructor() {\n      warnACPolyfill()\n    }\n    signal = new AS()\n    abort(reason: any) {\n      if (this.signal.aborted) return\n      //@ts-ignore\n      this.signal.reason = reason\n      //@ts-ignore\n      this.signal.aborted = true\n      //@ts-ignore\n      for (const fn of this.signal._onabort) {\n        fn(reason)\n      }\n      this.signal.onabort?.(reason)\n    }\n  }\n  let printACPolyfillWarning =\n    PROCESS.env?.LRU_CACHE_IGNORE_AC_WARNING !== '1'\n  const warnACPolyfill = () => {\n    if (!printACPolyfillWarning) return\n    printACPolyfillWarning = false\n    emitWarning(\n      'AbortController is not defined. If using lru-cache in ' +\n        'node 14, load an AbortController polyfill from the ' +\n        '`node-abort-controller` package. A minimal polyfill is ' +\n        'provided for use by LRUCache.fetch(), but it should not be ' +\n        'relied upon in other contexts (eg, passing it to other APIs that ' +\n        'use AbortController/AbortSignal might have undesirable effects). ' +\n        'You may disable this with LRU_CACHE_IGNORE_AC_WARNING=1 in the env.',\n      'NO_ABORT_CONTROLLER',\n      'ENOTSUP',\n      warnACPolyfill\n    )\n  }\n}\n/* c8 ignore stop */\n\nconst shouldWarn = (code: string) => !warned.has(code)\n\nconst TYPE = Symbol('type')\nexport type PosInt = number & { [TYPE]: 'Positive Integer' }\nexport type Index = number & { [TYPE]: 'LRUCache Index' }\n\nconst isPosInt = (n: any): n is PosInt =>\n  n && n === Math.floor(n) && n > 0 && isFinite(n)\n\nexport type UintArray = Uint8Array | Uint16Array | Uint32Array\nexport type NumberArray = UintArray | number[]\n\n/* c8 ignore start */\n// This is a little bit ridiculous, tbh.\n// The maximum array length is 2^32-1 or thereabouts on most JS impls.\n// And well before that point, you're caching the entire world, I mean,\n// that's ~32GB of just integers for the next/prev links, plus whatever\n// else to hold that many keys and values.  Just filling the memory with\n// zeroes at init time is brutal when you get that big.\n// But why not be complete?\n// Maybe in the future, these limits will have expanded.\nconst getUintArray = (max: number) =>\n  !isPosInt(max)\n    ? null\n    : max <= Math.pow(2, 8)\n    ? Uint8Array\n    : max <= Math.pow(2, 16)\n    ? Uint16Array\n    : max <= Math.pow(2, 32)\n    ? Uint32Array\n    : max <= Number.MAX_SAFE_INTEGER\n    ? ZeroArray\n    : null\n/* c8 ignore stop */\n\nclass ZeroArray extends Array<number> {\n  constructor(size: number) {\n    super(size)\n    this.fill(0)\n  }\n}\nexport type { ZeroArray }\nexport type { Stack }\n\nexport type StackLike = Stack | Index[]\nclass Stack {\n  heap: NumberArray\n  length: number\n  // private constructor\n  static #constructing: boolean = false\n  static create(max: number): StackLike {\n    const HeapCls = getUintArray(max)\n    if (!HeapCls) return []\n    Stack.#constructing = true\n    const s = new Stack(max, HeapCls)\n    Stack.#constructing = false\n    return s\n  }\n  constructor(\n    max: number,\n    HeapCls: { new (n: number): NumberArray }\n  ) {\n    /* c8 ignore start */\n    if (!Stack.#constructing) {\n      throw new TypeError('instantiate Stack using Stack.create(n)')\n    }\n    /* c8 ignore stop */\n    this.heap = new HeapCls(max)\n    this.length = 0\n  }\n  push(n: Index) {\n    this.heap[this.length++] = n\n  }\n  pop(): Index {\n    return this.heap[--this.length] as Index\n  }\n}\n\n/**\n * Promise representing an in-progress {@link LRUCache#fetch} call\n */\nexport type BackgroundFetch<V> = Promise<V | undefined> & {\n  __returned: BackgroundFetch<V> | undefined\n  __abortController: AbortController\n  __staleWhileFetching: V | undefined\n}\n\nexport type DisposeTask<K, V> = [\n  value: V,\n  key: K,\n  reason: LRUCache.DisposeReason\n]\n\nexport namespace LRUCache {\n  /**\n   * An integer greater than 0, reflecting the calculated size of items\n   */\n  export type Size = number\n\n  /**\n   * Integer greater than 0, representing some number of milliseconds, or the\n   * time at which a TTL started counting from.\n   */\n  export type Milliseconds = number\n\n  /**\n   * An integer greater than 0, reflecting a number of items\n   */\n  export type Count = number\n\n  /**\n   * The reason why an item was removed from the cache, passed\n   * to the {@link Disposer} methods.\n   *\n   * - `evict`: The item was evicted because it is the least recently used,\n   *   and the cache is full.\n   * - `set`: A new value was set, overwriting the old value being disposed.\n   * - `delete`: The item was explicitly deleted, either by calling\n   *   {@link LRUCache#delete}, {@link LRUCache#clear}, or\n   *   {@link LRUCache#set} with an undefined value.\n   * - `expire`: The item was removed due to exceeding its TTL.\n   * - `fetch`: A {@link OptionsBase#fetchMethod} operation returned\n   *   `undefined` or was aborted, causing the item to be deleted.\n   */\n  export type DisposeReason =\n    | 'evict'\n    | 'set'\n    | 'delete'\n    | 'expire'\n    | 'fetch'\n  /**\n   * A method called upon item removal, passed as the\n   * {@link OptionsBase.dispose} and/or\n   * {@link OptionsBase.disposeAfter} options.\n   */\n  export type Disposer<K, V> = (\n    value: V,\n    key: K,\n    reason: DisposeReason\n  ) => void\n\n  /**\n   * A function that returns the effective calculated size\n   * of an entry in the cache.\n   */\n  export type SizeCalculator<K, V> = (value: V, key: K) => Size\n\n  /**\n   * Options provided to the\n   * {@link OptionsBase.fetchMethod} function.\n   */\n  export interface FetcherOptions<K, V, FC = unknown> {\n    signal: AbortSignal\n    options: FetcherFetchOptions<K, V, FC>\n    /**\n     * Object provided in the {@link FetchOptions.context} option to\n     * {@link LRUCache#fetch}\n     */\n    context: FC\n  }\n\n  /**\n   * Occasionally, it may be useful to track the internal behavior of the\n   * cache, particularly for logging, debugging, or for behavior within the\n   * `fetchMethod`. To do this, you can pass a `status` object to the\n   * {@link LRUCache#fetch}, {@link LRUCache#get}, {@link LRUCache#set},\n   * {@link LRUCache#memo}, and {@link LRUCache#has} methods.\n   *\n   * The `status` option should be a plain JavaScript object. The following\n   * fields will be set on it appropriately, depending on the situation.\n   */\n  export interface Status<V> {\n    /**\n     * The status of a set() operation.\n     *\n     * - add: the item was not found in the cache, and was added\n     * - update: the item was in the cache, with the same value provided\n     * - replace: the item was in the cache, and replaced\n     * - miss: the item was not added to the cache for some reason\n     */\n    set?: 'add' | 'update' | 'replace' | 'miss'\n\n    /**\n     * the ttl stored for the item, or undefined if ttls are not used.\n     */\n    ttl?: Milliseconds\n\n    /**\n     * the start time for the item, or undefined if ttls are not used.\n     */\n    start?: Milliseconds\n\n    /**\n     * The timestamp used for TTL calculation\n     */\n    now?: Milliseconds\n\n    /**\n     * the remaining ttl for the item, or undefined if ttls are not used.\n     */\n    remainingTTL?: Milliseconds\n\n    /**\n     * The calculated size for the item, if sizes are used.\n     */\n    entrySize?: Size\n\n    /**\n     * The total calculated size of the cache, if sizes are used.\n     */\n    totalCalculatedSize?: Size\n\n    /**\n     * A flag indicating that the item was not stored, due to exceeding the\n     * {@link OptionsBase.maxEntrySize}\n     */\n    maxEntrySizeExceeded?: true\n\n    /**\n     * The old value, specified in the case of `set:'update'` or\n     * `set:'replace'`\n     */\n    oldValue?: V\n\n    /**\n     * The results of a {@link LRUCache#has} operation\n     *\n     * - hit: the item was found in the cache\n     * - stale: the item was found in the cache, but is stale\n     * - miss: the item was not found in the cache\n     */\n    has?: 'hit' | 'stale' | 'miss'\n\n    /**\n     * The status of a {@link LRUCache#fetch} operation.\n     * Note that this can change as the underlying fetch() moves through\n     * various states.\n     *\n     * - inflight: there is another fetch() for this key which is in process\n     * - get: there is no {@link OptionsBase.fetchMethod}, so\n     *   {@link LRUCache#get} was called.\n     * - miss: the item is not in cache, and will be fetched.\n     * - hit: the item is in the cache, and was resolved immediately.\n     * - stale: the item is in the cache, but stale.\n     * - refresh: the item is in the cache, and not stale, but\n     *   {@link FetchOptions.forceRefresh} was specified.\n     */\n    fetch?: 'get' | 'inflight' | 'miss' | 'hit' | 'stale' | 'refresh'\n\n    /**\n     * The {@link OptionsBase.fetchMethod} was called\n     */\n    fetchDispatched?: true\n\n    /**\n     * The cached value was updated after a successful call to\n     * {@link OptionsBase.fetchMethod}\n     */\n    fetchUpdated?: true\n\n    /**\n     * The reason for a fetch() rejection.  Either the error raised by the\n     * {@link OptionsBase.fetchMethod}, or the reason for an\n     * AbortSignal.\n     */\n    fetchError?: Error\n\n    /**\n     * The fetch received an abort signal\n     */\n    fetchAborted?: true\n\n    /**\n     * The abort signal received was ignored, and the fetch was allowed to\n     * continue.\n     */\n    fetchAbortIgnored?: true\n\n    /**\n     * The fetchMethod promise resolved successfully\n     */\n    fetchResolved?: true\n\n    /**\n     * The fetchMethod promise was rejected\n     */\n    fetchRejected?: true\n\n    /**\n     * The status of a {@link LRUCache#get} operation.\n     *\n     * - fetching: The item is currently being fetched.  If a previous value\n     *   is present and allowed, that will be returned.\n     * - stale: The item is in the cache, and is stale.\n     * - hit: the item is in the cache\n     * - miss: the item is not in the cache\n     */\n    get?: 'stale' | 'hit' | 'miss'\n\n    /**\n     * A fetch or get operation returned a stale value.\n     */\n    returnedStale?: true\n  }\n\n  /**\n   * options which override the options set in the LRUCache constructor\n   * when calling {@link LRUCache#fetch}.\n   *\n   * This is the union of {@link GetOptions} and {@link SetOptions}, plus\n   * {@link OptionsBase.noDeleteOnFetchRejection},\n   * {@link OptionsBase.allowStaleOnFetchRejection},\n   * {@link FetchOptions.forceRefresh}, and\n   * {@link FetcherOptions.context}\n   *\n   * Any of these may be modified in the {@link OptionsBase.fetchMethod}\n   * function, but the {@link GetOptions} fields will of course have no\n   * effect, as the {@link LRUCache#get} call already happened by the time\n   * the fetchMethod is called.\n   */\n  export interface FetcherFetchOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n      | 'noDeleteOnFetchRejection'\n      | 'allowStaleOnFetchRejection'\n      | 'ignoreFetchAbort'\n      | 'allowStaleOnFetchAbort'\n    > {\n    status?: Status<V>\n    size?: Size\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#fetch} method.\n   */\n  export interface FetchOptions<K, V, FC>\n    extends FetcherFetchOptions<K, V, FC> {\n    /**\n     * Set to true to force a re-load of the existing data, even if it\n     * is not yet stale.\n     */\n    forceRefresh?: boolean\n    /**\n     * Context provided to the {@link OptionsBase.fetchMethod} as\n     * the {@link FetcherOptions.context} param.\n     *\n     * If the FC type is specified as unknown (the default),\n     * undefined or void, then this is optional.  Otherwise, it will\n     * be required.\n     */\n    context?: FC\n    signal?: AbortSignal\n    status?: Status<V>\n  }\n  /**\n   * Options provided to {@link LRUCache#fetch} when the FC type is something\n   * other than `unknown`, `undefined`, or `void`\n   */\n  export interface FetchOptionsWithContext<K, V, FC>\n    extends FetchOptions<K, V, FC> {\n    context: FC\n  }\n  /**\n   * Options provided to {@link LRUCache#fetch} when the FC type is\n   * `undefined` or `void`\n   */\n  export interface FetchOptionsNoContext<K, V>\n    extends FetchOptions<K, V, undefined> {\n    context?: undefined\n  }\n\n  export interface MemoOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n      | 'noDeleteOnFetchRejection'\n      | 'allowStaleOnFetchRejection'\n      | 'ignoreFetchAbort'\n      | 'allowStaleOnFetchAbort'\n    > {\n    /**\n     * Set to true to force a re-load of the existing data, even if it\n     * is not yet stale.\n     */\n    forceRefresh?: boolean\n    /**\n     * Context provided to the {@link OptionsBase.memoMethod} as\n     * the {@link MemoizerOptions.context} param.\n     *\n     * If the FC type is specified as unknown (the default),\n     * undefined or void, then this is optional.  Otherwise, it will\n     * be required.\n     */\n    context?: FC\n    status?: Status<V>\n  }\n  /**\n   * Options provided to {@link LRUCache#memo} when the FC type is something\n   * other than `unknown`, `undefined`, or `void`\n   */\n  export interface MemoOptionsWithContext<K, V, FC>\n    extends MemoOptions<K, V, FC> {\n    context: FC\n  }\n  /**\n   * Options provided to {@link LRUCache#memo} when the FC type is\n   * `undefined` or `void`\n   */\n  export interface MemoOptionsNoContext<K, V>\n    extends MemoOptions<K, V, undefined> {\n    context?: undefined\n  }\n\n  /**\n   * Options provided to the\n   * {@link OptionsBase.memoMethod} function.\n   */\n  export interface MemoizerOptions<K, V, FC = unknown> {\n    options: MemoizerMemoOptions<K, V, FC>\n    /**\n     * Object provided in the {@link MemoOptions.context} option to\n     * {@link LRUCache#memo}\n     */\n    context: FC\n  }\n\n  /**\n   * options which override the options set in the LRUCache constructor\n   * when calling {@link LRUCache#memo}.\n   *\n   * This is the union of {@link GetOptions} and {@link SetOptions}, plus\n   * {@link MemoOptions.forceRefresh}, and\n   * {@link MemoerOptions.context}\n   *\n   * Any of these may be modified in the {@link OptionsBase.memoMethod}\n   * function, but the {@link GetOptions} fields will of course have no\n   * effect, as the {@link LRUCache#get} call already happened by the time\n   * the memoMethod is called.\n   */\n  export interface MemoizerMemoOptions<K, V, FC = unknown>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      | 'allowStale'\n      | 'updateAgeOnGet'\n      | 'noDeleteOnStaleGet'\n      | 'sizeCalculation'\n      | 'ttl'\n      | 'noDisposeOnSet'\n      | 'noUpdateTTL'\n    > {\n    status?: Status<V>\n    size?: Size\n    start?: Milliseconds\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#has} method.\n   */\n  export interface HasOptions<K, V, FC>\n    extends Pick<OptionsBase<K, V, FC>, 'updateAgeOnHas'> {\n    status?: Status<V>\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#get} method.\n   */\n  export interface GetOptions<K, V, FC>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      'allowStale' | 'updateAgeOnGet' | 'noDeleteOnStaleGet'\n    > {\n    status?: Status<V>\n  }\n\n  /**\n   * Options that may be passed to the {@link LRUCache#peek} method.\n   */\n  export interface PeekOptions<K, V, FC>\n    extends Pick<OptionsBase<K, V, FC>, 'allowStale'> {}\n\n  /**\n   * Options that may be passed to the {@link LRUCache#set} method.\n   */\n  export interface SetOptions<K, V, FC>\n    extends Pick<\n      OptionsBase<K, V, FC>,\n      'sizeCalculation' | 'ttl' | 'noDisposeOnSet' | 'noUpdateTTL'\n    > {\n    /**\n     * If size tracking is enabled, then setting an explicit size\n     * in the {@link LRUCache#set} call will prevent calling the\n     * {@link OptionsBase.sizeCalculation} function.\n     */\n    size?: Size\n    /**\n     * If TTL tracking is enabled, then setting an explicit start\n     * time in the {@link LRUCache#set} call will override the\n     * default time from `performance.now()` or `Date.now()`.\n     *\n     * Note that it must be a valid value for whichever time-tracking\n     * method is in use.\n     */\n    start?: Milliseconds\n    status?: Status<V>\n  }\n\n  /**\n   * The type signature for the {@link OptionsBase.fetchMethod} option.\n   */\n  export type Fetcher<K, V, FC = unknown> = (\n    key: K,\n    staleValue: V | undefined,\n    options: FetcherOptions<K, V, FC>\n  ) => Promise<V | undefined | void> | V | undefined | void\n\n  /**\n   * the type signature for the {@link OptionsBase.memoMethod} option.\n   */\n  export type Memoizer<K, V, FC = unknown> = (\n    key: K,\n    staleValue: V | undefined,\n    options: MemoizerOptions<K, V, FC>\n  ) => V\n\n  /**\n   * Options which may be passed to the {@link LRUCache} constructor.\n   *\n   * Most of these may be overridden in the various options that use\n   * them.\n   *\n   * Despite all being technically optional, the constructor requires that\n   * a cache is at minimum limited by one or more of {@link OptionsBase.max},\n   * {@link OptionsBase.ttl}, or {@link OptionsBase.maxSize}.\n   *\n   * If {@link OptionsBase.ttl} is used alone, then it is strongly advised\n   * (and in fact required by the type definitions here) that the cache\n   * also set {@link OptionsBase.ttlAutopurge}, to prevent potentially\n   * unbounded storage.\n   *\n   * All options are also available on the {@link LRUCache} instance, making\n   * it safe to pass an LRUCache instance as the options argumemnt to\n   * make another empty cache of the same type.\n   *\n   * Some options are marked as read-only, because changing them after\n   * instantiation is not safe. Changing any of the other options will of\n   * course only have an effect on subsequent method calls.\n   */\n  export interface OptionsBase<K, V, FC> {\n    /**\n     * The maximum number of items to store in the cache before evicting\n     * old entries. This is read-only on the {@link LRUCache} instance,\n     * and may not be overridden.\n     *\n     * If set, then storage space will be pre-allocated at construction\n     * time, and the cache will perform significantly faster.\n     *\n     * Note that significantly fewer items may be stored, if\n     * {@link OptionsBase.maxSize} and/or {@link OptionsBase.ttl} are also\n     * set.\n     *\n     * **It is strongly recommended to set a `max` to prevent unbounded growth\n     * of the cache.**\n     */\n    max?: Count\n\n    /**\n     * Max time in milliseconds for items to live in cache before they are\n     * considered stale.  Note that stale items are NOT preemptively removed by\n     * default, and MAY live in the cache, contributing to its LRU max, long\n     * after they have expired, unless {@link OptionsBase.ttlAutopurge} is\n     * set.\n     *\n     * If set to `0` (the default value), then that means \"do not track\n     * TTL\", not \"expire immediately\".\n     *\n     * Also, as this cache is optimized for LRU/MRU operations, some of\n     * the staleness/TTL checks will reduce performance, as they will incur\n     * overhead by deleting items.\n     *\n     * This is not primarily a TTL cache, and does not make strong TTL\n     * guarantees. There is no pre-emptive pruning of expired items, but you\n     * _may_ set a TTL on the cache, and it will treat expired items as missing\n     * when they are fetched, and delete them.\n     *\n     * Optional, but must be a non-negative integer in ms if specified.\n     *\n     * This may be overridden by passing an options object to `cache.set()`.\n     *\n     * At least one of `max`, `maxSize`, or `TTL` is required. This must be a\n     * positive integer if set.\n     *\n     * Even if ttl tracking is enabled, **it is strongly recommended to set a\n     * `max` to prevent unbounded growth of the cache.**\n     *\n     * If ttl tracking is enabled, and `max` and `maxSize` are not set,\n     * and `ttlAutopurge` is not set, then a warning will be emitted\n     * cautioning about the potential for unbounded memory consumption.\n     * (The TypeScript definitions will also discourage this.)\n     */\n    ttl?: Milliseconds\n\n    /**\n     * Minimum amount of time in ms in which to check for staleness.\n     * Defaults to 1, which means that the current time is checked\n     * at most once per millisecond.\n     *\n     * Set to 0 to check the current time every time staleness is tested.\n     * (This reduces performance, and is theoretically unnecessary.)\n     *\n     * Setting this to a higher value will improve performance somewhat\n     * while using ttl tracking, albeit at the expense of keeping stale\n     * items around a bit longer than their TTLs would indicate.\n     *\n     * @default 1\n     */\n    ttlResolution?: Milliseconds\n\n    /**\n     * Preemptively remove stale items from the cache.\n     *\n     * Note that this may *significantly* degrade performance, especially if\n     * the cache is storing a large number of items. It is almost always best\n     * to just leave the stale items in the cache, and let them fall out as new\n     * items are added.\n     *\n     * Note that this means that {@link OptionsBase.allowStale} is a bit\n     * pointless, as stale items will be deleted almost as soon as they\n     * expire.\n     *\n     * Use with caution!\n     */\n    ttlAutopurge?: boolean\n\n    /**\n     * When using time-expiring entries with `ttl`, setting this to `true` will\n     * make each item's age reset to 0 whenever it is retrieved from cache with\n     * {@link LRUCache#get}, causing it to not expire. (It can still fall out\n     * of cache based on recency of use, of course.)\n     *\n     * Has no effect if {@link OptionsBase.ttl} is not set.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     */\n    updateAgeOnGet?: boolean\n\n    /**\n     * When using time-expiring entries with `ttl`, setting this to `true` will\n     * make each item's age reset to 0 whenever its presence in the cache is\n     * checked with {@link LRUCache#has}, causing it to not expire. (It can\n     * still fall out of cache based on recency of use, of course.)\n     *\n     * Has no effect if {@link OptionsBase.ttl} is not set.\n     */\n    updateAgeOnHas?: boolean\n\n    /**\n     * Allow {@link LRUCache#get} and {@link LRUCache#fetch} calls to return\n     * stale data, if available.\n     *\n     * By default, if you set `ttl`, stale items will only be deleted from the\n     * cache when you `get(key)`. That is, it's not preemptively pruning items,\n     * unless {@link OptionsBase.ttlAutopurge} is set.\n     *\n     * If you set `allowStale:true`, it'll return the stale value *as well as*\n     * deleting it. If you don't set this, then it'll return `undefined` when\n     * you try to get a stale entry.\n     *\n     * Note that when a stale entry is fetched, _even if it is returned due to\n     * `allowStale` being set_, it is removed from the cache immediately. You\n     * can suppress this behavior by setting\n     * {@link OptionsBase.noDeleteOnStaleGet}, either in the constructor, or in\n     * the options provided to {@link LRUCache#get}.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     * The `cache.has()` method will always return `false` for stale items.\n     *\n     * Only relevant if a ttl is set.\n     */\n    allowStale?: boolean\n\n    /**\n     * Function that is called on items when they are dropped from the\n     * cache, as `dispose(value, key, reason)`.\n     *\n     * This can be handy if you want to close file descriptors or do\n     * other cleanup tasks when items are no longer stored in the cache.\n     *\n     * **NOTE**: It is called _before_ the item has been fully removed\n     * from the cache, so if you want to put it right back in, you need\n     * to wait until the next tick. If you try to add it back in during\n     * the `dispose()` function call, it will break things in subtle and\n     * weird ways.\n     *\n     * Unlike several other options, this may _not_ be overridden by\n     * passing an option to `set()`, for performance reasons.\n     *\n     * The `reason` will be one of the following strings, corresponding\n     * to the reason for the item's deletion:\n     *\n     * - `evict` Item was evicted to make space for a new addition\n     * - `set` Item was overwritten by a new value\n     * - `expire` Item expired its TTL\n     * - `fetch` Item was deleted due to a failed or aborted fetch, or a\n     *   fetchMethod returning `undefined.\n     * - `delete` Item was removed by explicit `cache.delete(key)`,\n     *   `cache.clear()`, or `cache.set(key, undefined)`.\n     */\n    dispose?: Disposer<K, V>\n\n    /**\n     * The same as {@link OptionsBase.dispose}, but called *after* the entry\n     * is completely removed and the cache is once again in a clean state.\n     *\n     * It is safe to add an item right back into the cache at this point.\n     * However, note that it is *very* easy to inadvertently create infinite\n     * recursion this way.\n     */\n    disposeAfter?: Disposer<K, V>\n\n    /**\n     * Set to true to suppress calling the\n     * {@link OptionsBase.dispose} function if the entry key is\n     * still accessible within the cache.\n     *\n     * This may be overridden by passing an options object to\n     * {@link LRUCache#set}.\n     *\n     * Only relevant if `dispose` or `disposeAfter` are set.\n     */\n    noDisposeOnSet?: boolean\n\n    /**\n     * Boolean flag to tell the cache to not update the TTL when setting a new\n     * value for an existing key (ie, when updating a value rather than\n     * inserting a new value).  Note that the TTL value is _always_ set (if\n     * provided) when adding a new entry into the cache.\n     *\n     * Has no effect if a {@link OptionsBase.ttl} is not set.\n     *\n     * May be passed as an option to {@link LRUCache#set}.\n     */\n    noUpdateTTL?: boolean\n\n    /**\n     * Set to a positive integer to track the sizes of items added to the\n     * cache, and automatically evict items in order to stay below this size.\n     * Note that this may result in fewer than `max` items being stored.\n     *\n     * Attempting to add an item to the cache whose calculated size is greater\n     * that this amount will be a no-op. The item will not be cached, and no\n     * other items will be evicted.\n     *\n     * Optional, must be a positive integer if provided.\n     *\n     * Sets `maxEntrySize` to the same value, unless a different value is\n     * provided for `maxEntrySize`.\n     *\n     * At least one of `max`, `maxSize`, or `TTL` is required. This must be a\n     * positive integer if set.\n     *\n     * Even if size tracking is enabled, **it is strongly recommended to set a\n     * `max` to prevent unbounded growth of the cache.**\n     *\n     * Note also that size tracking can negatively impact performance,\n     * though for most cases, only minimally.\n     */\n    maxSize?: Size\n\n    /**\n     * The maximum allowed size for any single item in the cache.\n     *\n     * If a larger item is passed to {@link LRUCache#set} or returned by a\n     * {@link OptionsBase.fetchMethod} or {@link OptionsBase.memoMethod}, then\n     * it will not be stored in the cache.\n     *\n     * Attempting to add an item whose calculated size is greater than\n     * this amount will not cache the item or evict any old items, but\n     * WILL delete an existing value if one is already present.\n     *\n     * Optional, must be a positive integer if provided. Defaults to\n     * the value of `maxSize` if provided.\n     */\n    maxEntrySize?: Size\n\n    /**\n     * A function that returns a number indicating the item's size.\n     *\n     * Requires {@link OptionsBase.maxSize} to be set.\n     *\n     * If not provided, and {@link OptionsBase.maxSize} or\n     * {@link OptionsBase.maxEntrySize} are set, then all\n     * {@link LRUCache#set} calls **must** provide an explicit\n     * {@link SetOptions.size} or sizeCalculation param.\n     */\n    sizeCalculation?: SizeCalculator<K, V>\n\n    /**\n     * Method that provides the implementation for {@link LRUCache#fetch}\n     *\n     * ```ts\n     * fetchMethod(key, staleValue, { signal, options, context })\n     * ```\n     *\n     * If `fetchMethod` is not provided, then `cache.fetch(key)` is equivalent\n     * to `Promise.resolve(cache.get(key))`.\n     *\n     * If at any time, `signal.aborted` is set to `true`, or if the\n     * `signal.onabort` method is called, or if it emits an `'abort'` event\n     * which you can listen to with `addEventListener`, then that means that\n     * the fetch should be abandoned. This may be passed along to async\n     * functions aware of AbortController/AbortSignal behavior.\n     *\n     * The `fetchMethod` should **only** return `undefined` or a Promise\n     * resolving to `undefined` if the AbortController signaled an `abort`\n     * event. In all other cases, it should return or resolve to a value\n     * suitable for adding to the cache.\n     *\n     * The `options` object is a union of the options that may be provided to\n     * `set()` and `get()`. If they are modified, then that will result in\n     * modifying the settings to `cache.set()` when the value is resolved, and\n     * in the case of\n     * {@link OptionsBase.noDeleteOnFetchRejection} and\n     * {@link OptionsBase.allowStaleOnFetchRejection}, the handling of\n     * `fetchMethod` failures.\n     *\n     * For example, a DNS cache may update the TTL based on the value returned\n     * from a remote DNS server by changing `options.ttl` in the `fetchMethod`.\n     */\n    fetchMethod?: Fetcher<K, V, FC>\n\n    /**\n     * Method that provides the implementation for {@link LRUCache#memo}\n     */\n    memoMethod?: Memoizer<K, V, FC>\n\n    /**\n     * Set to true to suppress the deletion of stale data when a\n     * {@link OptionsBase.fetchMethod} returns a rejected promise.\n     */\n    noDeleteOnFetchRejection?: boolean\n\n    /**\n     * Do not delete stale items when they are retrieved with\n     * {@link LRUCache#get}.\n     *\n     * Note that the `get` return value will still be `undefined`\n     * unless {@link OptionsBase.allowStale} is true.\n     *\n     * When using time-expiring entries with `ttl`, by default stale\n     * items will be removed from the cache when the key is accessed\n     * with `cache.get()`.\n     *\n     * Setting this option will cause stale items to remain in the cache, until\n     * they are explicitly deleted with `cache.delete(key)`, or retrieved with\n     * `noDeleteOnStaleGet` set to `false`.\n     *\n     * This may be overridden by passing an options object to `cache.get()`.\n     *\n     * Only relevant if a ttl is used.\n     */\n    noDeleteOnStaleGet?: boolean\n\n    /**\n     * Set to true to allow returning stale data when a\n     * {@link OptionsBase.fetchMethod} throws an error or returns a rejected\n     * promise.\n     *\n     * This differs from using {@link OptionsBase.allowStale} in that stale\n     * data will ONLY be returned in the case that the {@link LRUCache#fetch}\n     * fails, not any other times.\n     *\n     * If a `fetchMethod` fails, and there is no stale value available, the\n     * `fetch()` will resolve to `undefined`. Ie, all `fetchMethod` errors are\n     * suppressed.\n     *\n     * Implies `noDeleteOnFetchRejection`.\n     *\n     * This may be set in calls to `fetch()`, or defaulted on the constructor,\n     * or overridden by modifying the options object in the `fetchMethod`.\n     */\n    allowStaleOnFetchRejection?: boolean\n\n    /**\n     * Set to true to return a stale value from the cache when the\n     * `AbortSignal` passed to the {@link OptionsBase.fetchMethod} dispatches\n     * an `'abort'` event, whether user-triggered, or due to internal cache\n     * behavior.\n     *\n     * Unless {@link OptionsBase.ignoreFetchAbort} is also set, the underlying\n     * {@link OptionsBase.fetchMethod} will still be considered canceled, and\n     * any value it returns will be ignored and not cached.\n     *\n     * Caveat: since fetches are aborted when a new value is explicitly\n     * set in the cache, this can lead to fetch returning a stale value,\n     * since that was the fallback value _at the moment the `fetch()` was\n     * initiated_, even though the new updated value is now present in\n     * the cache.\n     *\n     * For example:\n     *\n     * ```ts\n     * const cache = new LRUCache<string, any>({\n     *   ttl: 100,\n     *   fetchMethod: async (url, oldValue, { signal }) =>  {\n     *     const res = await fetch(url, { signal })\n     *     return await res.json()\n     *   }\n     * })\n     * cache.set('https://example.com/', { some: 'data' })\n     * // 100ms go by...\n     * const result = cache.fetch('https://example.com/')\n     * cache.set('https://example.com/', { other: 'thing' })\n     * console.log(await result) // { some: 'data' }\n     * console.log(cache.get('https://example.com/')) // { other: 'thing' }\n     * ```\n     */\n    allowStaleOnFetchAbort?: boolean\n\n    /**\n     * Set to true to ignore the `abort` event emitted by the `AbortSignal`\n     * object passed to {@link OptionsBase.fetchMethod}, and still cache the\n     * resulting resolution value, as long as it is not `undefined`.\n     *\n     * When used on its own, this means aborted {@link LRUCache#fetch} calls\n     * are not immediately resolved or rejected when they are aborted, and\n     * instead take the full time to await.\n     *\n     * When used with {@link OptionsBase.allowStaleOnFetchAbort}, aborted\n     * {@link LRUCache#fetch} calls will resolve immediately to their stale\n     * cached value or `undefined`, and will continue to process and eventually\n     * update the cache when they resolve, as long as the resulting value is\n     * not `undefined`, thus supporting a \"return stale on timeout while\n     * refreshing\" mechanism by passing `AbortSignal.timeout(n)` as the signal.\n     *\n     * For example:\n     *\n     * ```ts\n     * const c = new LRUCache({\n     *   ttl: 100,\n     *   ignoreFetchAbort: true,\n     *   allowStaleOnFetchAbort: true,\n     *   fetchMethod: async (key, oldValue, { signal }) => {\n     *     // note: do NOT pass the signal to fetch()!\n     *     // let's say this fetch can take a long time.\n     *     const res = await fetch(`https://slow-backend-server/${key}`)\n     *     return await res.json()\n     *   },\n     * })\n     *\n     * // this will return the stale value after 100ms, while still\n     * // updating in the background for next time.\n     * const val = await c.fetch('key', { signal: AbortSignal.timeout(100) })\n     * ```\n     *\n     * **Note**: regardless of this setting, an `abort` event _is still\n     * emitted on the `AbortSignal` object_, so may result in invalid results\n     * when passed to other underlying APIs that use AbortSignals.\n     *\n     * This may be overridden in the {@link OptionsBase.fetchMethod} or the\n     * call to {@link LRUCache#fetch}.\n     */\n    ignoreFetchAbort?: boolean\n  }\n\n  export interface OptionsMaxLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    max: Count\n  }\n  export interface OptionsTTLLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    ttl: Milliseconds\n    ttlAutopurge: boolean\n  }\n  export interface OptionsSizeLimit<K, V, FC>\n    extends OptionsBase<K, V, FC> {\n    maxSize: Size\n  }\n\n  /**\n   * The valid safe options for the {@link LRUCache} constructor\n   */\n  export type Options<K, V, FC> =\n    | OptionsMaxLimit<K, V, FC>\n    | OptionsSizeLimit<K, V, FC>\n    | OptionsTTLLimit<K, V, FC>\n\n  /**\n   * Entry objects used by {@link LRUCache#load} and {@link LRUCache#dump},\n   * and returned by {@link LRUCache#info}.\n   */\n  export interface Entry<V> {\n    value: V\n    ttl?: Milliseconds\n    size?: Size\n    start?: Milliseconds\n  }\n}\n\n/**\n * Default export, the thing you're using this module to get.\n *\n * The `K` and `V` types define the key and value types, respectively. The\n * optional `FC` type defines the type of the `context` object passed to\n * `cache.fetch()` and `cache.memo()`.\n *\n * Keys and values **must not** be `null` or `undefined`.\n *\n * All properties from the options object (with the exception of `max`,\n * `maxSize`, `fetchMethod`, `memoMethod`, `dispose` and `disposeAfter`) are\n * added as normal public members. (The listed options are read-only getters.)\n *\n * Changing any of these will alter the defaults for subsequent method calls.\n */\nexport class LRUCache<K extends {}, V extends {}, FC = unknown>\n  implements Map<K, V>\n{\n  // options that cannot be changed without disaster\n  readonly #max: LRUCache.Count\n  readonly #maxSize: LRUCache.Size\n  readonly #dispose?: LRUCache.Disposer<K, V>\n  readonly #disposeAfter?: LRUCache.Disposer<K, V>\n  readonly #fetchMethod?: LRUCache.Fetcher<K, V, FC>\n  readonly #memoMethod?: LRUCache.Memoizer<K, V, FC>\n\n  /**\n   * {@link LRUCache.OptionsBase.ttl}\n   */\n  ttl: LRUCache.Milliseconds\n\n  /**\n   * {@link LRUCache.OptionsBase.ttlResolution}\n   */\n  ttlResolution: LRUCache.Milliseconds\n  /**\n   * {@link LRUCache.OptionsBase.ttlAutopurge}\n   */\n  ttlAutopurge: boolean\n  /**\n   * {@link LRUCache.OptionsBase.updateAgeOnGet}\n   */\n  updateAgeOnGet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.updateAgeOnHas}\n   */\n  updateAgeOnHas: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStale}\n   */\n  allowStale: boolean\n\n  /**\n   * {@link LRUCache.OptionsBase.noDisposeOnSet}\n   */\n  noDisposeOnSet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.noUpdateTTL}\n   */\n  noUpdateTTL: boolean\n  /**\n   * {@link LRUCache.OptionsBase.maxEntrySize}\n   */\n  maxEntrySize: LRUCache.Size\n  /**\n   * {@link LRUCache.OptionsBase.sizeCalculation}\n   */\n  sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  /**\n   * {@link LRUCache.OptionsBase.noDeleteOnFetchRejection}\n   */\n  noDeleteOnFetchRejection: boolean\n  /**\n   * {@link LRUCache.OptionsBase.noDeleteOnStaleGet}\n   */\n  noDeleteOnStaleGet: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort}\n   */\n  allowStaleOnFetchAbort: boolean\n  /**\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchRejection}\n   */\n  allowStaleOnFetchRejection: boolean\n  /**\n   * {@link LRUCache.OptionsBase.ignoreFetchAbort}\n   */\n  ignoreFetchAbort: boolean\n\n  // computed properties\n  #size: LRUCache.Count\n  #calculatedSize: LRUCache.Size\n  #keyMap: Map<K, Index>\n  #keyList: (K | undefined)[]\n  #valList: (V | BackgroundFetch<V> | undefined)[]\n  #next: NumberArray\n  #prev: NumberArray\n  #head: Index\n  #tail: Index\n  #free: StackLike\n  #disposed?: DisposeTask<K, V>[]\n  #sizes?: ZeroArray\n  #starts?: ZeroArray\n  #ttls?: ZeroArray\n\n  #hasDispose: boolean\n  #hasFetchMethod: boolean\n  #hasDisposeAfter: boolean\n\n  /**\n   * Do not call this method unless you need to inspect the\n   * inner workings of the cache.  If anything returned by this\n   * object is modified in any way, strange breakage may occur.\n   *\n   * These fields are private for a reason!\n   *\n   * @internal\n   */\n  static unsafeExposeInternals<\n    K extends {},\n    V extends {},\n    FC extends unknown = unknown\n  >(c: LRUCache<K, V, FC>) {\n    return {\n      // properties\n      starts: c.#starts,\n      ttls: c.#ttls,\n      sizes: c.#sizes,\n      keyMap: c.#keyMap as Map<K, number>,\n      keyList: c.#keyList,\n      valList: c.#valList,\n      next: c.#next,\n      prev: c.#prev,\n      get head() {\n        return c.#head\n      },\n      get tail() {\n        return c.#tail\n      },\n      free: c.#free,\n      // methods\n      isBackgroundFetch: (p: any) => c.#isBackgroundFetch(p),\n      backgroundFetch: (\n        k: K,\n        index: number | undefined,\n        options: LRUCache.FetchOptions<K, V, FC>,\n        context: any\n      ): BackgroundFetch<V> =>\n        c.#backgroundFetch(\n          k,\n          index as Index | undefined,\n          options,\n          context\n        ),\n      moveToTail: (index: number): void =>\n        c.#moveToTail(index as Index),\n      indexes: (options?: { allowStale: boolean }) =>\n        c.#indexes(options),\n      rindexes: (options?: { allowStale: boolean }) =>\n        c.#rindexes(options),\n      isStale: (index: number | undefined) =>\n        c.#isStale(index as Index),\n    }\n  }\n\n  // Protected read-only members\n\n  /**\n   * {@link LRUCache.OptionsBase.max} (read-only)\n   */\n  get max(): LRUCache.Count {\n    return this.#max\n  }\n  /**\n   * {@link LRUCache.OptionsBase.maxSize} (read-only)\n   */\n  get maxSize(): LRUCache.Count {\n    return this.#maxSize\n  }\n  /**\n   * The total computed size of items in the cache (read-only)\n   */\n  get calculatedSize(): LRUCache.Size {\n    return this.#calculatedSize\n  }\n  /**\n   * The number of items stored in the cache (read-only)\n   */\n  get size(): LRUCache.Count {\n    return this.#size\n  }\n  /**\n   * {@link LRUCache.OptionsBase.fetchMethod} (read-only)\n   */\n  get fetchMethod(): LRUCache.Fetcher<K, V, FC> | undefined {\n    return this.#fetchMethod\n  }\n  get memoMethod(): LRUCache.Memoizer<K, V, FC> | undefined {\n    return this.#memoMethod\n  }\n  /**\n   * {@link LRUCache.OptionsBase.dispose} (read-only)\n   */\n  get dispose() {\n    return this.#dispose\n  }\n  /**\n   * {@link LRUCache.OptionsBase.disposeAfter} (read-only)\n   */\n  get disposeAfter() {\n    return this.#disposeAfter\n  }\n\n  constructor(\n    options: LRUCache.Options<K, V, FC> | LRUCache<K, V, FC>\n  ) {\n    const {\n      max = 0,\n      ttl,\n      ttlResolution = 1,\n      ttlAutopurge,\n      updateAgeOnGet,\n      updateAgeOnHas,\n      allowStale,\n      dispose,\n      disposeAfter,\n      noDisposeOnSet,\n      noUpdateTTL,\n      maxSize = 0,\n      maxEntrySize = 0,\n      sizeCalculation,\n      fetchMethod,\n      memoMethod,\n      noDeleteOnFetchRejection,\n      noDeleteOnStaleGet,\n      allowStaleOnFetchRejection,\n      allowStaleOnFetchAbort,\n      ignoreFetchAbort,\n    } = options\n\n    if (max !== 0 && !isPosInt(max)) {\n      throw new TypeError('max option must be a nonnegative integer')\n    }\n\n    const UintArray = max ? getUintArray(max) : Array\n    if (!UintArray) {\n      throw new Error('invalid max value: ' + max)\n    }\n\n    this.#max = max\n    this.#maxSize = maxSize\n    this.maxEntrySize = maxEntrySize || this.#maxSize\n    this.sizeCalculation = sizeCalculation\n    if (this.sizeCalculation) {\n      if (!this.#maxSize && !this.maxEntrySize) {\n        throw new TypeError(\n          'cannot set sizeCalculation without setting maxSize or maxEntrySize'\n        )\n      }\n      if (typeof this.sizeCalculation !== 'function') {\n        throw new TypeError('sizeCalculation set to non-function')\n      }\n    }\n\n    if (\n      memoMethod !== undefined &&\n      typeof memoMethod !== 'function'\n    ) {\n      throw new TypeError('memoMethod must be a function if defined')\n    }\n    this.#memoMethod = memoMethod\n\n    if (\n      fetchMethod !== undefined &&\n      typeof fetchMethod !== 'function'\n    ) {\n      throw new TypeError(\n        'fetchMethod must be a function if specified'\n      )\n    }\n    this.#fetchMethod = fetchMethod\n    this.#hasFetchMethod = !!fetchMethod\n\n    this.#keyMap = new Map()\n    this.#keyList = new Array(max).fill(undefined)\n    this.#valList = new Array(max).fill(undefined)\n    this.#next = new UintArray(max)\n    this.#prev = new UintArray(max)\n    this.#head = 0 as Index\n    this.#tail = 0 as Index\n    this.#free = Stack.create(max)\n    this.#size = 0\n    this.#calculatedSize = 0\n\n    if (typeof dispose === 'function') {\n      this.#dispose = dispose\n    }\n    if (typeof disposeAfter === 'function') {\n      this.#disposeAfter = disposeAfter\n      this.#disposed = []\n    } else {\n      this.#disposeAfter = undefined\n      this.#disposed = undefined\n    }\n    this.#hasDispose = !!this.#dispose\n    this.#hasDisposeAfter = !!this.#disposeAfter\n\n    this.noDisposeOnSet = !!noDisposeOnSet\n    this.noUpdateTTL = !!noUpdateTTL\n    this.noDeleteOnFetchRejection = !!noDeleteOnFetchRejection\n    this.allowStaleOnFetchRejection = !!allowStaleOnFetchRejection\n    this.allowStaleOnFetchAbort = !!allowStaleOnFetchAbort\n    this.ignoreFetchAbort = !!ignoreFetchAbort\n\n    // NB: maxEntrySize is set to maxSize if it's set\n    if (this.maxEntrySize !== 0) {\n      if (this.#maxSize !== 0) {\n        if (!isPosInt(this.#maxSize)) {\n          throw new TypeError(\n            'maxSize must be a positive integer if specified'\n          )\n        }\n      }\n      if (!isPosInt(this.maxEntrySize)) {\n        throw new TypeError(\n          'maxEntrySize must be a positive integer if specified'\n        )\n      }\n      this.#initializeSizeTracking()\n    }\n\n    this.allowStale = !!allowStale\n    this.noDeleteOnStaleGet = !!noDeleteOnStaleGet\n    this.updateAgeOnGet = !!updateAgeOnGet\n    this.updateAgeOnHas = !!updateAgeOnHas\n    this.ttlResolution =\n      isPosInt(ttlResolution) || ttlResolution === 0\n        ? ttlResolution\n        : 1\n    this.ttlAutopurge = !!ttlAutopurge\n    this.ttl = ttl || 0\n    if (this.ttl) {\n      if (!isPosInt(this.ttl)) {\n        throw new TypeError(\n          'ttl must be a positive integer if specified'\n        )\n      }\n      this.#initializeTTLTracking()\n    }\n\n    // do not allow completely unbounded caches\n    if (this.#max === 0 && this.ttl === 0 && this.#maxSize === 0) {\n      throw new TypeError(\n        'At least one of max, maxSize, or ttl is required'\n      )\n    }\n    if (!this.ttlAutopurge && !this.#max && !this.#maxSize) {\n      const code = 'LRU_CACHE_UNBOUNDED'\n      if (shouldWarn(code)) {\n        warned.add(code)\n        const msg =\n          'TTL caching without ttlAutopurge, max, or maxSize can ' +\n          'result in unbounded memory consumption.'\n        emitWarning(msg, 'UnboundedCacheWarning', code, LRUCache)\n      }\n    }\n  }\n\n  /**\n   * Return the number of ms left in the item's TTL. If item is not in cache,\n   * returns `0`. Returns `Infinity` if item is in cache without a defined TTL.\n   */\n  getRemainingTTL(key: K) {\n    return this.#keyMap.has(key) ? Infinity : 0\n  }\n\n  #initializeTTLTracking() {\n    const ttls = new ZeroArray(this.#max)\n    const starts = new ZeroArray(this.#max)\n    this.#ttls = ttls\n    this.#starts = starts\n\n    this.#setItemTTL = (index, ttl, start = perf.now()) => {\n      starts[index] = ttl !== 0 ? start : 0\n      ttls[index] = ttl\n      if (ttl !== 0 && this.ttlAutopurge) {\n        const t = setTimeout(() => {\n          if (this.#isStale(index)) {\n            this.#delete(this.#keyList[index] as K, 'expire')\n          }\n        }, ttl + 1)\n        // unref() not supported on all platforms\n        /* c8 ignore start */\n        if (t.unref) {\n          t.unref()\n        }\n        /* c8 ignore stop */\n      }\n    }\n\n    this.#updateItemAge = index => {\n      starts[index] = ttls[index] !== 0 ? perf.now() : 0\n    }\n\n    this.#statusTTL = (status, index) => {\n      if (ttls[index]) {\n        const ttl = ttls[index]\n        const start = starts[index]\n        /* c8 ignore next */\n        if (!ttl || !start) return\n        status.ttl = ttl\n        status.start = start\n        status.now = cachedNow || getNow()\n        const age = status.now - start\n        status.remainingTTL = ttl - age\n      }\n    }\n\n    // debounce calls to perf.now() to 1s so we're not hitting\n    // that costly call repeatedly.\n    let cachedNow = 0\n    const getNow = () => {\n      const n = perf.now()\n      if (this.ttlResolution > 0) {\n        cachedNow = n\n        const t = setTimeout(\n          () => (cachedNow = 0),\n          this.ttlResolution\n        )\n        // not available on all platforms\n        /* c8 ignore start */\n        if (t.unref) {\n          t.unref()\n        }\n        /* c8 ignore stop */\n      }\n      return n\n    }\n\n    this.getRemainingTTL = key => {\n      const index = this.#keyMap.get(key)\n      if (index === undefined) {\n        return 0\n      }\n      const ttl = ttls[index]\n      const start = starts[index]\n      if (!ttl || !start) {\n        return Infinity\n      }\n      const age = (cachedNow || getNow()) - start\n      return ttl - age\n    }\n\n    this.#isStale = index => {\n      const s = starts[index]\n      const t = ttls[index]\n      return !!t && !!s && (cachedNow || getNow()) - s > t\n    }\n  }\n\n  // conditionally set private methods related to TTL\n  #updateItemAge: (index: Index) => void = () => {}\n  #statusTTL: (status: LRUCache.Status<V>, index: Index) => void =\n    () => {}\n  #setItemTTL: (\n    index: Index,\n    ttl: LRUCache.Milliseconds,\n    start?: LRUCache.Milliseconds\n    // ignore because we never call this if we're not already in TTL mode\n    /* c8 ignore start */\n  ) => void = () => {}\n  /* c8 ignore stop */\n\n  #isStale: (index: Index) => boolean = () => false\n\n  #initializeSizeTracking() {\n    const sizes = new ZeroArray(this.#max)\n    this.#calculatedSize = 0\n    this.#sizes = sizes\n    this.#removeItemSize = index => {\n      this.#calculatedSize -= sizes[index] as number\n      sizes[index] = 0\n    }\n    this.#requireSize = (k, v, size, sizeCalculation) => {\n      // provisionally accept background fetches.\n      // actual value size will be checked when they return.\n      if (this.#isBackgroundFetch(v)) {\n        return 0\n      }\n      if (!isPosInt(size)) {\n        if (sizeCalculation) {\n          if (typeof sizeCalculation !== 'function') {\n            throw new TypeError('sizeCalculation must be a function')\n          }\n          size = sizeCalculation(v, k)\n          if (!isPosInt(size)) {\n            throw new TypeError(\n              'sizeCalculation return invalid (expect positive integer)'\n            )\n          }\n        } else {\n          throw new TypeError(\n            'invalid size value (must be positive integer). ' +\n              'When maxSize or maxEntrySize is used, sizeCalculation ' +\n              'or size must be set.'\n          )\n        }\n      }\n      return size\n    }\n    this.#addItemSize = (\n      index: Index,\n      size: LRUCache.Size,\n      status?: LRUCache.Status<V>\n    ) => {\n      sizes[index] = size\n      if (this.#maxSize) {\n        const maxSize = this.#maxSize - (sizes[index] as number)\n        while (this.#calculatedSize > maxSize) {\n          this.#evict(true)\n        }\n      }\n      this.#calculatedSize += sizes[index] as number\n      if (status) {\n        status.entrySize = size\n        status.totalCalculatedSize = this.#calculatedSize\n      }\n    }\n  }\n\n  #removeItemSize: (index: Index) => void = _i => {}\n  #addItemSize: (\n    index: Index,\n    size: LRUCache.Size,\n    status?: LRUCache.Status<V>\n  ) => void = (_i, _s, _st) => {}\n  #requireSize: (\n    k: K,\n    v: V | BackgroundFetch<V>,\n    size?: LRUCache.Size,\n    sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  ) => LRUCache.Size = (\n    _k: K,\n    _v: V | BackgroundFetch<V>,\n    size?: LRUCache.Size,\n    sizeCalculation?: LRUCache.SizeCalculator<K, V>\n  ) => {\n    if (size || sizeCalculation) {\n      throw new TypeError(\n        'cannot set size without setting maxSize or maxEntrySize on cache'\n      )\n    }\n    return 0\n  };\n\n  *#indexes({ allowStale = this.allowStale } = {}) {\n    if (this.#size) {\n      for (let i = this.#tail; true; ) {\n        if (!this.#isValidIndex(i)) {\n          break\n        }\n        if (allowStale || !this.#isStale(i)) {\n          yield i\n        }\n        if (i === this.#head) {\n          break\n        } else {\n          i = this.#prev[i] as Index\n        }\n      }\n    }\n  }\n\n  *#rindexes({ allowStale = this.allowStale } = {}) {\n    if (this.#size) {\n      for (let i = this.#head; true; ) {\n        if (!this.#isValidIndex(i)) {\n          break\n        }\n        if (allowStale || !this.#isStale(i)) {\n          yield i\n        }\n        if (i === this.#tail) {\n          break\n        } else {\n          i = this.#next[i] as Index\n        }\n      }\n    }\n  }\n\n  #isValidIndex(index: Index) {\n    return (\n      index !== undefined &&\n      this.#keyMap.get(this.#keyList[index] as K) === index\n    )\n  }\n\n  /**\n   * Return a generator yielding `[key, value]` pairs,\n   * in order from most recently used to least recently used.\n   */\n  *entries() {\n    for (const i of this.#indexes()) {\n      if (\n        this.#valList[i] !== undefined &&\n        this.#keyList[i] !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield [this.#keyList[i], this.#valList[i]] as [K, V]\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.entries}\n   *\n   * Return a generator yielding `[key, value]` pairs,\n   * in order from least recently used to most recently used.\n   */\n  *rentries() {\n    for (const i of this.#rindexes()) {\n      if (\n        this.#valList[i] !== undefined &&\n        this.#keyList[i] !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield [this.#keyList[i], this.#valList[i]]\n      }\n    }\n  }\n\n  /**\n   * Return a generator yielding the keys in the cache,\n   * in order from most recently used to least recently used.\n   */\n  *keys() {\n    for (const i of this.#indexes()) {\n      const k = this.#keyList[i]\n      if (\n        k !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield k\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.keys}\n   *\n   * Return a generator yielding the keys in the cache,\n   * in order from least recently used to most recently used.\n   */\n  *rkeys() {\n    for (const i of this.#rindexes()) {\n      const k = this.#keyList[i]\n      if (\n        k !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield k\n      }\n    }\n  }\n\n  /**\n   * Return a generator yielding the values in the cache,\n   * in order from most recently used to least recently used.\n   */\n  *values() {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      if (\n        v !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield this.#valList[i] as V\n      }\n    }\n  }\n\n  /**\n   * Inverse order version of {@link LRUCache.values}\n   *\n   * Return a generator yielding the values in the cache,\n   * in order from least recently used to most recently used.\n   */\n  *rvalues() {\n    for (const i of this.#rindexes()) {\n      const v = this.#valList[i]\n      if (\n        v !== undefined &&\n        !this.#isBackgroundFetch(this.#valList[i])\n      ) {\n        yield this.#valList[i]\n      }\n    }\n  }\n\n  /**\n   * Iterating over the cache itself yields the same results as\n   * {@link LRUCache.entries}\n   */\n  [Symbol.iterator]() {\n    return this.entries()\n  }\n\n  /**\n   * A String value that is used in the creation of the default string\n   * description of an object. Called by the built-in method\n   * `Object.prototype.toString`.\n   */\n  [Symbol.toStringTag] = 'LRUCache'\n\n  /**\n   * Find a value for which the supplied fn method returns a truthy value,\n   * similar to `Array.find()`. fn is called as `fn(value, key, cache)`.\n   */\n  find(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => boolean,\n    getOptions: LRUCache.GetOptions<K, V, FC> = {}\n  ) {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      if (fn(value, this.#keyList[i] as K, this)) {\n        return this.get(this.#keyList[i] as K, getOptions)\n      }\n    }\n  }\n\n  /**\n   * Call the supplied function on each item in the cache, in order from most\n   * recently used to least recently used.\n   *\n   * `fn` is called as `fn(value, key, cache)`.\n   *\n   * If `thisp` is provided, function will be called in the `this`-context of\n   * the provided object, or the cache if no `thisp` object is provided.\n   *\n   * Does not update age or recenty of use, or iterate over stale values.\n   */\n  forEach(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any,\n    thisp: any = this\n  ) {\n    for (const i of this.#indexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      fn.call(thisp, value, this.#keyList[i] as K, this)\n    }\n  }\n\n  /**\n   * The same as {@link LRUCache.forEach} but items are iterated over in\n   * reverse order.  (ie, less recently used items are iterated over first.)\n   */\n  rforEach(\n    fn: (v: V, k: K, self: LRUCache<K, V, FC>) => any,\n    thisp: any = this\n  ) {\n    for (const i of this.#rindexes()) {\n      const v = this.#valList[i]\n      const value = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined) continue\n      fn.call(thisp, value, this.#keyList[i] as K, this)\n    }\n  }\n\n  /**\n   * Delete any stale entries. Returns true if anything was removed,\n   * false otherwise.\n   */\n  purgeStale() {\n    let deleted = false\n    for (const i of this.#rindexes({ allowStale: true })) {\n      if (this.#isStale(i)) {\n        this.#delete(this.#keyList[i] as K, 'expire')\n        deleted = true\n      }\n    }\n    return deleted\n  }\n\n  /**\n   * Get the extended info about a given entry, to get its value, size, and\n   * TTL info simultaneously. Returns `undefined` if the key is not present.\n   *\n   * Unlike {@link LRUCache#dump}, which is designed to be portable and survive\n   * serialization, the `start` value is always the current timestamp, and the\n   * `ttl` is a calculated remaining time to live (negative if expired).\n   *\n   * Always returns stale values, if their info is found in the cache, so be\n   * sure to check for expirations (ie, a negative {@link LRUCache.Entry#ttl})\n   * if relevant.\n   */\n  info(key: K): LRUCache.Entry<V> | undefined {\n    const i = this.#keyMap.get(key)\n    if (i === undefined) return undefined\n    const v = this.#valList[i]\n    const value: V | undefined = this.#isBackgroundFetch(v)\n      ? v.__staleWhileFetching\n      : v\n    if (value === undefined) return undefined\n    const entry: LRUCache.Entry<V> = { value }\n    if (this.#ttls && this.#starts) {\n      const ttl = this.#ttls[i]\n      const start = this.#starts[i]\n      if (ttl && start) {\n        const remain = ttl - (perf.now() - start)\n        entry.ttl = remain\n        entry.start = Date.now()\n      }\n    }\n    if (this.#sizes) {\n      entry.size = this.#sizes[i]\n    }\n    return entry\n  }\n\n  /**\n   * Return an array of [key, {@link LRUCache.Entry}] tuples which can be\n   * passed to {@link LRLUCache#load}.\n   *\n   * The `start` fields are calculated relative to a portable `Date.now()`\n   * timestamp, even if `performance.now()` is available.\n   *\n   * Stale entries are always included in the `dump`, even if\n   * {@link LRUCache.OptionsBase.allowStale} is false.\n   *\n   * Note: this returns an actual array, not a generator, so it can be more\n   * easily passed around.\n   */\n  dump() {\n    const arr: [K, LRUCache.Entry<V>][] = []\n    for (const i of this.#indexes({ allowStale: true })) {\n      const key = this.#keyList[i]\n      const v = this.#valList[i]\n      const value: V | undefined = this.#isBackgroundFetch(v)\n        ? v.__staleWhileFetching\n        : v\n      if (value === undefined || key === undefined) continue\n      const entry: LRUCache.Entry<V> = { value }\n      if (this.#ttls && this.#starts) {\n        entry.ttl = this.#ttls[i]\n        // always dump the start relative to a portable timestamp\n        // it's ok for this to be a bit slow, it's a rare operation.\n        const age = perf.now() - (this.#starts[i] as number)\n        entry.start = Math.floor(Date.now() - age)\n      }\n      if (this.#sizes) {\n        entry.size = this.#sizes[i]\n      }\n      arr.unshift([key, entry])\n    }\n    return arr\n  }\n\n  /**\n   * Reset the cache and load in the items in entries in the order listed.\n   *\n   * The shape of the resulting cache may be different if the same options are\n   * not used in both caches.\n   *\n   * The `start` fields are assumed to be calculated relative to a portable\n   * `Date.now()` timestamp, even if `performance.now()` is available.\n   */\n  load(arr: [K, LRUCache.Entry<V>][]) {\n    this.clear()\n    for (const [key, entry] of arr) {\n      if (entry.start) {\n        // entry.start is a portable timestamp, but we may be using\n        // node's performance.now(), so calculate the offset, so that\n        // we get the intended remaining TTL, no matter how long it's\n        // been on ice.\n        //\n        // it's ok for this to be a bit slow, it's a rare operation.\n        const age = Date.now() - entry.start\n        entry.start = perf.now() - age\n      }\n      this.set(key, entry.value, entry)\n    }\n  }\n\n  /**\n   * Add a value to the cache.\n   *\n   * Note: if `undefined` is specified as a value, this is an alias for\n   * {@link LRUCache#delete}\n   *\n   * Fields on the {@link LRUCache.SetOptions} options param will override\n   * their corresponding values in the constructor options for the scope\n   * of this single `set()` operation.\n   *\n   * If `start` is provided, then that will set the effective start\n   * time for the TTL calculation. Note that this must be a previous\n   * value of `performance.now()` if supported, or a previous value of\n   * `Date.now()` if not.\n   *\n   * Options object may also include `size`, which will prevent\n   * calling the `sizeCalculation` function and just use the specified\n   * number if it is a positive integer, and `noDisposeOnSet` which\n   * will prevent calling a `dispose` function in the case of\n   * overwrites.\n   *\n   * If the `size` (or return value of `sizeCalculation`) for a given\n   * entry is greater than `maxEntrySize`, then the item will not be\n   * added to the cache.\n   *\n   * Will update the recency of the entry.\n   *\n   * If the value is `undefined`, then this is an alias for\n   * `cache.delete(key)`. `undefined` is never stored in the cache.\n   */\n  set(\n    k: K,\n    v: V | BackgroundFetch<V> | undefined,\n    setOptions: LRUCache.SetOptions<K, V, FC> = {}\n  ) {\n    if (v === undefined) {\n      this.delete(k)\n      return this\n    }\n    const {\n      ttl = this.ttl,\n      start,\n      noDisposeOnSet = this.noDisposeOnSet,\n      sizeCalculation = this.sizeCalculation,\n      status,\n    } = setOptions\n    let { noUpdateTTL = this.noUpdateTTL } = setOptions\n\n    const size = this.#requireSize(\n      k,\n      v,\n      setOptions.size || 0,\n      sizeCalculation\n    )\n    // if the item doesn't fit, don't do anything\n    // NB: maxEntrySize set to maxSize by default\n    if (this.maxEntrySize && size > this.maxEntrySize) {\n      if (status) {\n        status.set = 'miss'\n        status.maxEntrySizeExceeded = true\n      }\n      // have to delete, in case something is there already.\n      this.#delete(k, 'set')\n      return this\n    }\n    let index = this.#size === 0 ? undefined : this.#keyMap.get(k)\n    if (index === undefined) {\n      // addition\n      index = (\n        this.#size === 0\n          ? this.#tail\n          : this.#free.length !== 0\n          ? this.#free.pop()\n          : this.#size === this.#max\n          ? this.#evict(false)\n          : this.#size\n      ) as Index\n      this.#keyList[index] = k\n      this.#valList[index] = v\n      this.#keyMap.set(k, index)\n      this.#next[this.#tail] = index\n      this.#prev[index] = this.#tail\n      this.#tail = index\n      this.#size++\n      this.#addItemSize(index, size, status)\n      if (status) status.set = 'add'\n      noUpdateTTL = false\n    } else {\n      // update\n      this.#moveToTail(index)\n      const oldVal = this.#valList[index] as V | BackgroundFetch<V>\n      if (v !== oldVal) {\n        if (this.#hasFetchMethod && this.#isBackgroundFetch(oldVal)) {\n          oldVal.__abortController.abort(new Error('replaced'))\n          const { __staleWhileFetching: s } = oldVal\n          if (s !== undefined && !noDisposeOnSet) {\n            if (this.#hasDispose) {\n              this.#dispose?.(s as V, k, 'set')\n            }\n            if (this.#hasDisposeAfter) {\n              this.#disposed?.push([s as V, k, 'set'])\n            }\n          }\n        } else if (!noDisposeOnSet) {\n          if (this.#hasDispose) {\n            this.#dispose?.(oldVal as V, k, 'set')\n          }\n          if (this.#hasDisposeAfter) {\n            this.#disposed?.push([oldVal as V, k, 'set'])\n          }\n        }\n        this.#removeItemSize(index)\n        this.#addItemSize(index, size, status)\n        this.#valList[index] = v\n        if (status) {\n          status.set = 'replace'\n          const oldValue =\n            oldVal && this.#isBackgroundFetch(oldVal)\n              ? oldVal.__staleWhileFetching\n              : oldVal\n          if (oldValue !== undefined) status.oldValue = oldValue\n        }\n      } else if (status) {\n        status.set = 'update'\n      }\n    }\n    if (ttl !== 0 && !this.#ttls) {\n      this.#initializeTTLTracking()\n    }\n    if (this.#ttls) {\n      if (!noUpdateTTL) {\n        this.#setItemTTL(index, ttl, start)\n      }\n      if (status) this.#statusTTL(status, index)\n    }\n    if (!noDisposeOnSet && this.#hasDisposeAfter && this.#disposed) {\n      const dt = this.#disposed\n      let task: DisposeTask<K, V> | undefined\n      while ((task = dt?.shift())) {\n        this.#disposeAfter?.(...task)\n      }\n    }\n    return this\n  }\n\n  /**\n   * Evict the least recently used item, returning its value or\n   * `undefined` if cache is empty.\n   */\n  pop(): V | undefined {\n    try {\n      while (this.#size) {\n        const val = this.#valList[this.#head]\n        this.#evict(true)\n        if (this.#isBackgroundFetch(val)) {\n          if (val.__staleWhileFetching) {\n            return val.__staleWhileFetching\n          }\n        } else if (val !== undefined) {\n          return val\n        }\n      }\n    } finally {\n      if (this.#hasDisposeAfter && this.#disposed) {\n        const dt = this.#disposed\n        let task: DisposeTask<K, V> | undefined\n        while ((task = dt?.shift())) {\n          this.#disposeAfter?.(...task)\n        }\n      }\n    }\n  }\n\n  #evict(free: boolean) {\n    const head = this.#head\n    const k = this.#keyList[head] as K\n    const v = this.#valList[head] as V\n    if (this.#hasFetchMethod && this.#isBackgroundFetch(v)) {\n      v.__abortController.abort(new Error('evicted'))\n    } else if (this.#hasDispose || this.#hasDisposeAfter) {\n      if (this.#hasDispose) {\n        this.#dispose?.(v, k, 'evict')\n      }\n      if (this.#hasDisposeAfter) {\n        this.#disposed?.push([v, k, 'evict'])\n      }\n    }\n    this.#removeItemSize(head)\n    // if we aren't about to use the index, then null these out\n    if (free) {\n      this.#keyList[head] = undefined\n      this.#valList[head] = undefined\n      this.#free.push(head)\n    }\n    if (this.#size === 1) {\n      this.#head = this.#tail = 0 as Index\n      this.#free.length = 0\n    } else {\n      this.#head = this.#next[head] as Index\n    }\n    this.#keyMap.delete(k)\n    this.#size--\n    return head\n  }\n\n  /**\n   * Check if a key is in the cache, without updating the recency of use.\n   * Will return false if the item is stale, even though it is technically\n   * in the cache.\n   *\n   * Check if a key is in the cache, without updating the recency of\n   * use. Age is updated if {@link LRUCache.OptionsBase.updateAgeOnHas} is set\n   * to `true` in either the options or the constructor.\n   *\n   * Will return `false` if the item is stale, even though it is technically in\n   * the cache. The difference can be determined (if it matters) by using a\n   * `status` argument, and inspecting the `has` field.\n   *\n   * Will not update item age unless\n   * {@link LRUCache.OptionsBase.updateAgeOnHas} is set.\n   */\n  has(k: K, hasOptions: LRUCache.HasOptions<K, V, FC> = {}) {\n    const { updateAgeOnHas = this.updateAgeOnHas, status } =\n      hasOptions\n    const index = this.#keyMap.get(k)\n    if (index !== undefined) {\n      const v = this.#valList[index]\n      if (\n        this.#isBackgroundFetch(v) &&\n        v.__staleWhileFetching === undefined\n      ) {\n        return false\n      }\n      if (!this.#isStale(index)) {\n        if (updateAgeOnHas) {\n          this.#updateItemAge(index)\n        }\n        if (status) {\n          status.has = 'hit'\n          this.#statusTTL(status, index)\n        }\n        return true\n      } else if (status) {\n        status.has = 'stale'\n        this.#statusTTL(status, index)\n      }\n    } else if (status) {\n      status.has = 'miss'\n    }\n    return false\n  }\n\n  /**\n   * Like {@link LRUCache#get} but doesn't update recency or delete stale\n   * items.\n   *\n   * Returns `undefined` if the item is stale, unless\n   * {@link LRUCache.OptionsBase.allowStale} is set.\n   */\n  peek(k: K, peekOptions: LRUCache.PeekOptions<K, V, FC> = {}) {\n    const { allowStale = this.allowStale } = peekOptions\n    const index = this.#keyMap.get(k)\n    if (\n      index === undefined ||\n      (!allowStale && this.#isStale(index))\n    ) {\n      return\n    }\n    const v = this.#valList[index]\n    // either stale and allowed, or forcing a refresh of non-stale value\n    return this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v\n  }\n\n  #backgroundFetch(\n    k: K,\n    index: Index | undefined,\n    options: LRUCache.FetchOptions<K, V, FC>,\n    context: any\n  ): BackgroundFetch<V> {\n    const v = index === undefined ? undefined : this.#valList[index]\n    if (this.#isBackgroundFetch(v)) {\n      return v\n    }\n\n    const ac = new AC()\n    const { signal } = options\n    // when/if our AC signals, then stop listening to theirs.\n    signal?.addEventListener('abort', () => ac.abort(signal.reason), {\n      signal: ac.signal,\n    })\n\n    const fetchOpts = {\n      signal: ac.signal,\n      options,\n      context,\n    }\n\n    const cb = (\n      v: V | undefined,\n      updateCache = false\n    ): V | undefined => {\n      const { aborted } = ac.signal\n      const ignoreAbort = options.ignoreFetchAbort && v !== undefined\n      if (options.status) {\n        if (aborted && !updateCache) {\n          options.status.fetchAborted = true\n          options.status.fetchError = ac.signal.reason\n          if (ignoreAbort) options.status.fetchAbortIgnored = true\n        } else {\n          options.status.fetchResolved = true\n        }\n      }\n      if (aborted && !ignoreAbort && !updateCache) {\n        return fetchFail(ac.signal.reason)\n      }\n      // either we didn't abort, and are still here, or we did, and ignored\n      const bf = p as BackgroundFetch<V>\n      if (this.#valList[index as Index] === p) {\n        if (v === undefined) {\n          if (bf.__staleWhileFetching) {\n            this.#valList[index as Index] = bf.__staleWhileFetching\n          } else {\n            this.#delete(k, 'fetch')\n          }\n        } else {\n          if (options.status) options.status.fetchUpdated = true\n          this.set(k, v, fetchOpts.options)\n        }\n      }\n      return v\n    }\n\n    const eb = (er: any) => {\n      if (options.status) {\n        options.status.fetchRejected = true\n        options.status.fetchError = er\n      }\n      return fetchFail(er)\n    }\n\n    const fetchFail = (er: any): V | undefined => {\n      const { aborted } = ac.signal\n      const allowStaleAborted =\n        aborted && options.allowStaleOnFetchAbort\n      const allowStale =\n        allowStaleAborted || options.allowStaleOnFetchRejection\n      const noDelete = allowStale || options.noDeleteOnFetchRejection\n      const bf = p as BackgroundFetch<V>\n      if (this.#valList[index as Index] === p) {\n        // if we allow stale on fetch rejections, then we need to ensure that\n        // the stale value is not removed from the cache when the fetch fails.\n        const del = !noDelete || bf.__staleWhileFetching === undefined\n        if (del) {\n          this.#delete(k, 'fetch')\n        } else if (!allowStaleAborted) {\n          // still replace the *promise* with the stale value,\n          // since we are done with the promise at this point.\n          // leave it untouched if we're still waiting for an\n          // aborted background fetch that hasn't yet returned.\n          this.#valList[index as Index] = bf.__staleWhileFetching\n        }\n      }\n      if (allowStale) {\n        if (options.status && bf.__staleWhileFetching !== undefined) {\n          options.status.returnedStale = true\n        }\n        return bf.__staleWhileFetching\n      } else if (bf.__returned === bf) {\n        throw er\n      }\n    }\n\n    const pcall = (\n      res: (v: V | undefined) => void,\n      rej: (e: any) => void\n    ) => {\n      const fmp = this.#fetchMethod?.(k, v, fetchOpts)\n      if (fmp && fmp instanceof Promise) {\n        fmp.then(v => res(v === undefined ? undefined : v), rej)\n      }\n      // ignored, we go until we finish, regardless.\n      // defer check until we are actually aborting,\n      // so fetchMethod can override.\n      ac.signal.addEventListener('abort', () => {\n        if (\n          !options.ignoreFetchAbort ||\n          options.allowStaleOnFetchAbort\n        ) {\n          res(undefined)\n          // when it eventually resolves, update the cache.\n          if (options.allowStaleOnFetchAbort) {\n            res = v => cb(v, true)\n          }\n        }\n      })\n    }\n\n    if (options.status) options.status.fetchDispatched = true\n    const p = new Promise(pcall).then(cb, eb)\n    const bf: BackgroundFetch<V> = Object.assign(p, {\n      __abortController: ac,\n      __staleWhileFetching: v,\n      __returned: undefined,\n    })\n\n    if (index === undefined) {\n      // internal, don't expose status.\n      this.set(k, bf, { ...fetchOpts.options, status: undefined })\n      index = this.#keyMap.get(k)\n    } else {\n      this.#valList[index] = bf\n    }\n    return bf\n  }\n\n  #isBackgroundFetch(p: any): p is BackgroundFetch<V> {\n    if (!this.#hasFetchMethod) return false\n    const b = p as BackgroundFetch<V>\n    return (\n      !!b &&\n      b instanceof Promise &&\n      b.hasOwnProperty('__staleWhileFetching') &&\n      b.__abortController instanceof AC\n    )\n  }\n\n  /**\n   * Make an asynchronous cached fetch using the\n   * {@link LRUCache.OptionsBase.fetchMethod} function.\n   *\n   * If the value is in the cache and not stale, then the returned\n   * Promise resolves to the value.\n   *\n   * If not in the cache, or beyond its TTL staleness, then\n   * `fetchMethod(key, staleValue, { options, signal, context })` is\n   * called, and the value returned will be added to the cache once\n   * resolved.\n   *\n   * If called with `allowStale`, and an asynchronous fetch is\n   * currently in progress to reload a stale value, then the former\n   * stale value will be returned.\n   *\n   * If called with `forceRefresh`, then the cached item will be\n   * re-fetched, even if it is not stale. However, if `allowStale` is also\n   * set, then the old value will still be returned. This is useful\n   * in cases where you want to force a reload of a cached value. If\n   * a background fetch is already in progress, then `forceRefresh`\n   * has no effect.\n   *\n   * If multiple fetches for the same key are issued, then they will all be\n   * coalesced into a single call to fetchMethod.\n   *\n   * Note that this means that handling options such as\n   * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort},\n   * {@link LRUCache.FetchOptions.signal},\n   * and {@link LRUCache.OptionsBase.allowStaleOnFetchRejection} will be\n   * determined by the FIRST fetch() call for a given key.\n   *\n   * This is a known (fixable) shortcoming which will be addresed on when\n   * someone complains about it, as the fix would involve added complexity and\n   * may not be worth the costs for this edge case.\n   *\n   * If {@link LRUCache.OptionsBase.fetchMethod} is not specified, then this is\n   * effectively an alias for `Promise.resolve(cache.get(key))`.\n   *\n   * When the fetch method resolves to a value, if the fetch has not\n   * been aborted due to deletion, eviction, or being overwritten,\n   * then it is added to the cache using the options provided.\n   *\n   * If the key is evicted or deleted before the `fetchMethod`\n   * resolves, then the AbortSignal passed to the `fetchMethod` will\n   * receive an `abort` event, and the promise returned by `fetch()`\n   * will reject with the reason for the abort.\n   *\n   * If a `signal` is passed to the `fetch()` call, then aborting the\n   * signal will abort the fetch and cause the `fetch()` promise to\n   * reject with the reason provided.\n   *\n   * **Setting `context`**\n   *\n   * If an `FC` type is set to a type other than `unknown`, `void`, or\n   * `undefined` in the {@link LRUCache} constructor, then all\n   * calls to `cache.fetch()` _must_ provide a `context` option. If\n   * set to `undefined` or `void`, then calls to fetch _must not_\n   * provide a `context` option.\n   *\n   * The `context` param allows you to provide arbitrary data that\n   * might be relevant in the course of fetching the data. It is only\n   * relevant for the course of a single `fetch()` operation, and\n   * discarded afterwards.\n   *\n   * **Note: `fetch()` calls are inflight-unique**\n   *\n   * If you call `fetch()` multiple times with the same key value,\n   * then every call after the first will resolve on the same\n   * promise<sup>1</sup>,\n   * _even if they have different settings that would otherwise change\n   * the behavior of the fetch_, such as `noDeleteOnFetchRejection`\n   * or `ignoreFetchAbort`.\n   *\n   * In most cases, this is not a problem (in fact, only fetching\n   * something once is what you probably want, if you're caching in\n   * the first place). If you are changing the fetch() options\n   * dramatically between runs, there's a good chance that you might\n   * be trying to fit divergent semantics into a single object, and\n   * would be better off with multiple cache instances.\n   *\n   * **1**: Ie, they're not the \"same Promise\", but they resolve at\n   * the same time, because they're both waiting on the same\n   * underlying fetchMethod response.\n   */\n\n  fetch(\n    k: K,\n    fetchOptions: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : LRUCache.FetchOptionsWithContext<K, V, FC>\n  ): Promise<undefined | V>\n\n  // this overload not allowed if context is required\n  fetch(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    fetchOptions?: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : never\n  ): Promise<undefined | V>\n\n  async fetch(\n    k: K,\n    fetchOptions: LRUCache.FetchOptions<K, V, FC> = {}\n  ): Promise<undefined | V> {\n    const {\n      // get options\n      allowStale = this.allowStale,\n      updateAgeOnGet = this.updateAgeOnGet,\n      noDeleteOnStaleGet = this.noDeleteOnStaleGet,\n      // set options\n      ttl = this.ttl,\n      noDisposeOnSet = this.noDisposeOnSet,\n      size = 0,\n      sizeCalculation = this.sizeCalculation,\n      noUpdateTTL = this.noUpdateTTL,\n      // fetch exclusive options\n      noDeleteOnFetchRejection = this.noDeleteOnFetchRejection,\n      allowStaleOnFetchRejection = this.allowStaleOnFetchRejection,\n      ignoreFetchAbort = this.ignoreFetchAbort,\n      allowStaleOnFetchAbort = this.allowStaleOnFetchAbort,\n      context,\n      forceRefresh = false,\n      status,\n      signal,\n    } = fetchOptions\n\n    if (!this.#hasFetchMethod) {\n      if (status) status.fetch = 'get'\n      return this.get(k, {\n        allowStale,\n        updateAgeOnGet,\n        noDeleteOnStaleGet,\n        status,\n      })\n    }\n\n    const options = {\n      allowStale,\n      updateAgeOnGet,\n      noDeleteOnStaleGet,\n      ttl,\n      noDisposeOnSet,\n      size,\n      sizeCalculation,\n      noUpdateTTL,\n      noDeleteOnFetchRejection,\n      allowStaleOnFetchRejection,\n      allowStaleOnFetchAbort,\n      ignoreFetchAbort,\n      status,\n      signal,\n    }\n\n    let index = this.#keyMap.get(k)\n    if (index === undefined) {\n      if (status) status.fetch = 'miss'\n      const p = this.#backgroundFetch(k, index, options, context)\n      return (p.__returned = p)\n    } else {\n      // in cache, maybe already fetching\n      const v = this.#valList[index]\n      if (this.#isBackgroundFetch(v)) {\n        const stale =\n          allowStale && v.__staleWhileFetching !== undefined\n        if (status) {\n          status.fetch = 'inflight'\n          if (stale) status.returnedStale = true\n        }\n        return stale ? v.__staleWhileFetching : (v.__returned = v)\n      }\n\n      // if we force a refresh, that means do NOT serve the cached value,\n      // unless we are already in the process of refreshing the cache.\n      const isStale = this.#isStale(index)\n      if (!forceRefresh && !isStale) {\n        if (status) status.fetch = 'hit'\n        this.#moveToTail(index)\n        if (updateAgeOnGet) {\n          this.#updateItemAge(index)\n        }\n        if (status) this.#statusTTL(status, index)\n        return v\n      }\n\n      // ok, it is stale or a forced refresh, and not already fetching.\n      // refresh the cache.\n      const p = this.#backgroundFetch(k, index, options, context)\n      const hasStale = p.__staleWhileFetching !== undefined\n      const staleVal = hasStale && allowStale\n      if (status) {\n        status.fetch = isStale ? 'stale' : 'refresh'\n        if (staleVal && isStale) status.returnedStale = true\n      }\n      return staleVal ? p.__staleWhileFetching : (p.__returned = p)\n    }\n  }\n\n  /**\n   * In some cases, `cache.fetch()` may resolve to `undefined`, either because\n   * a {@link LRUCache.OptionsBase#fetchMethod} was not provided (turning\n   * `cache.fetch(k)` into just an async wrapper around `cache.get(k)`) or\n   * because `ignoreFetchAbort` was specified (either to the constructor or\n   * in the {@link LRUCache.FetchOptions}). Also, the\n   * {@link OptionsBase.fetchMethod} may return `undefined` or `void`, making\n   * the test even more complicated.\n   *\n   * Because inferring the cases where `undefined` might be returned are so\n   * cumbersome, but testing for `undefined` can also be annoying, this method\n   * can be used, which will reject if `this.fetch()` resolves to undefined.\n   */\n  forceFetch(\n    k: K,\n    fetchOptions: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : LRUCache.FetchOptionsWithContext<K, V, FC>\n  ): Promise<V>\n  // this overload not allowed if context is required\n  forceFetch(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    fetchOptions?: unknown extends FC\n      ? LRUCache.FetchOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.FetchOptionsNoContext<K, V>\n      : never\n  ): Promise<V>\n  async forceFetch(\n    k: K,\n    fetchOptions: LRUCache.FetchOptions<K, V, FC> = {}\n  ): Promise<V> {\n    const v = await this.fetch(\n      k,\n      fetchOptions as unknown extends FC\n        ? LRUCache.FetchOptions<K, V, FC>\n        : FC extends undefined | void\n        ? LRUCache.FetchOptionsNoContext<K, V>\n        : LRUCache.FetchOptionsWithContext<K, V, FC>\n    )\n    if (v === undefined) throw new Error('fetch() returned undefined')\n    return v\n  }\n\n  /**\n   * If the key is found in the cache, then this is equivalent to\n   * {@link LRUCache#get}. If not, in the cache, then calculate the value using\n   * the {@link LRUCache.OptionsBase.memoMethod}, and add it to the cache.\n   *\n   * If an `FC` type is set to a type other than `unknown`, `void`, or\n   * `undefined` in the LRUCache constructor, then all calls to `cache.memo()`\n   * _must_ provide a `context` option. If set to `undefined` or `void`, then\n   * calls to memo _must not_ provide a `context` option.\n   *\n   * The `context` param allows you to provide arbitrary data that might be\n   * relevant in the course of fetching the data. It is only relevant for the\n   * course of a single `memo()` operation, and discarded afterwards.\n   */\n  memo(\n    k: K,\n    memoOptions: unknown extends FC\n      ? LRUCache.MemoOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.MemoOptionsNoContext<K, V>\n      : LRUCache.MemoOptionsWithContext<K, V, FC>\n  ): V\n  // this overload not allowed if context is required\n  memo(\n    k: unknown extends FC\n      ? K\n      : FC extends undefined | void\n      ? K\n      : never,\n    memoOptions?: unknown extends FC\n      ? LRUCache.MemoOptions<K, V, FC>\n      : FC extends undefined | void\n      ? LRUCache.MemoOptionsNoContext<K, V>\n      : never\n  ): V\n  memo(k: K, memoOptions: LRUCache.MemoOptions<K, V, FC> = {}) {\n    const memoMethod = this.#memoMethod\n    if (!memoMethod) {\n      throw new Error('no memoMethod provided to constructor')\n    }\n    const { context, forceRefresh, ...options } = memoOptions\n    const v = this.get(k, options)\n    if (!forceRefresh && v !== undefined) return v\n    const vv = memoMethod(k, v, {\n      options,\n      context,\n    } as LRUCache.MemoizerOptions<K, V, FC>)\n    this.set(k, vv, options)\n    return vv\n  }\n\n  /**\n   * Return a value from the cache. Will update the recency of the cache\n   * entry found.\n   *\n   * If the key is not found, get() will return `undefined`.\n   */\n  get(k: K, getOptions: LRUCache.GetOptions<K, V, FC> = {}) {\n    const {\n      allowStale = this.allowStale,\n      updateAgeOnGet = this.updateAgeOnGet,\n      noDeleteOnStaleGet = this.noDeleteOnStaleGet,\n      status,\n    } = getOptions\n    const index = this.#keyMap.get(k)\n    if (index !== undefined) {\n      const value = this.#valList[index]\n      const fetching = this.#isBackgroundFetch(value)\n      if (status) this.#statusTTL(status, index)\n      if (this.#isStale(index)) {\n        if (status) status.get = 'stale'\n        // delete only if not an in-flight background fetch\n        if (!fetching) {\n          if (!noDeleteOnStaleGet) {\n            this.#delete(k, 'expire')\n          }\n          if (status && allowStale) status.returnedStale = true\n          return allowStale ? value : undefined\n        } else {\n          if (\n            status &&\n            allowStale &&\n            value.__staleWhileFetching !== undefined\n          ) {\n            status.returnedStale = true\n          }\n          return allowStale ? 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+  "names": ["perf", "warned", "PROCESS", "emitWarning", "msg", "type", "code", "fn", "AC", "AS", "_", "warnACPolyfill", "reason", "printACPolyfillWarning", "shouldWarn", "TYPE", "isPosInt", "n", "getUintArray", "max", "ZeroArray", "size", "_constructing", "_Stack", "HeapCls", "__privateSet", "s", "__privateGet", "Stack", "__privateAdd", "LRUCache", "#max", "#maxSize", "#dispose", "#disposeAfter", "#fetchMethod", "#memoMethod", "#size", "#calculatedSize", "#keyMap", "#keyList", "#valList", "#next", "#prev", "#head", "#tail", "#free", "#disposed", "#sizes", "#starts", "#ttls", "#hasDispose", "#hasFetchMethod", "#hasDisposeAfter", "c", "p", "#isBackgroundFetch", "k", "index", "options", "context", "#backgroundFetch", "#moveToTail", "#indexes", "#rindexes", "#isStale", "ttl", "ttlResolution", "ttlAutopurge", "updateAgeOnGet", "updateAgeOnHas", "allowStale", "dispose", "disposeAfter", "noDisposeOnSet", "noUpdateTTL", "maxSize", "maxEntrySize", "sizeCalculation", "fetchMethod", "memoMethod", "noDeleteOnFetchRejection", "noDeleteOnStaleGet", "allowStaleOnFetchRejection", "allowStaleOnFetchAbort", "ignoreFetchAbort", "UintArray", "#initializeSizeTracking", "#initializeTTLTracking", "key", "ttls", "starts", "#setItemTTL", "start", "t", "#delete", "#updateItemAge", "#statusTTL", "status", "cachedNow", "getNow", "age", "sizes", "#removeItemSize", "#requireSize", "v", "#addItemSize", "#evict", "_i", "_s", "_st", "_k", "_v", "i", "#isValidIndex", "getOptions", "value", "thisp", "deleted", "entry", "remain", "arr", "setOptions", "oldVal", "oldValue", "dt", "task", "val", "free", "head", "hasOptions", "peekOptions", "ac", "signal", "fetchOpts", "cb", "updateCache", "aborted", "ignoreAbort", "fetchFail", "bf", "eb", "er", "allowStaleAborted", "noDelete", "pcall", "res", "rej", "fmp", "b", "fetchOptions", "forceRefresh", "stale", "isStale", "staleVal", "memoOptions", "vv", "fetching", "#connect", "#clear", "pi", "ni"]
+}
diff --git a/mqtt-backend/node_modules/lru-cache/dist/esm/package.json b/mqtt-backend/node_modules/lru-cache/dist/esm/package.json
new file mode 100644
index 0000000..3dbc1ca
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/dist/esm/package.json
@@ -0,0 +1,3 @@
+{
+  "type": "module"
+}
diff --git a/mqtt-backend/node_modules/lru-cache/package.json b/mqtt-backend/node_modules/lru-cache/package.json
new file mode 100644
index 0000000..f3cd4c0
--- /dev/null
+++ b/mqtt-backend/node_modules/lru-cache/package.json
@@ -0,0 +1,116 @@
+{
+  "name": "lru-cache",
+  "publishConfig": {
+    "tag": "legacy-v10"
+  },
+  "description": "A cache object that deletes the least-recently-used items.",
+  "version": "10.4.3",
+  "author": "Isaac Z. Schlueter <i@izs.me>",
+  "keywords": [
+    "mru",
+    "lru",
+    "cache"
+  ],
+  "sideEffects": false,
+  "scripts": {
+    "build": "npm run prepare",
+    "prepare": "tshy && bash fixup.sh",
+    "pretest": "npm run prepare",
+    "presnap": "npm run prepare",
+    "test": "tap",
+    "snap": "tap",
+    "preversion": "npm test",
+    "postversion": "npm publish",
+    "prepublishOnly": "git push origin --follow-tags",
+    "format": "prettier --write .",
+    "typedoc": "typedoc --tsconfig ./.tshy/esm.json ./src/*.ts",
+    "benchmark-results-typedoc": "bash scripts/benchmark-results-typedoc.sh",
+    "prebenchmark": "npm run prepare",
+    "benchmark": "make -C benchmark",
+    "preprofile": "npm run prepare",
+    "profile": "make -C benchmark profile"
+  },
+  "main": "./dist/commonjs/index.js",
+  "types": "./dist/commonjs/index.d.ts",
+  "tshy": {
+    "exports": {
+      ".": "./src/index.ts",
+      "./min": {
+        "import": {
+          "types": "./dist/esm/index.d.ts",
+          "default": "./dist/esm/index.min.js"
+        },
+        "require": {
+          "types": "./dist/commonjs/index.d.ts",
+          "default": "./dist/commonjs/index.min.js"
+        }
+      }
+    }
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/node-lru-cache.git"
+  },
+  "devDependencies": {
+    "@types/node": "^20.2.5",
+    "@types/tap": "^15.0.6",
+    "benchmark": "^2.1.4",
+    "esbuild": "^0.17.11",
+    "eslint-config-prettier": "^8.5.0",
+    "marked": "^4.2.12",
+    "mkdirp": "^2.1.5",
+    "prettier": "^2.6.2",
+    "tap": "^20.0.3",
+    "tshy": "^2.0.0",
+    "tslib": "^2.4.0",
+    "typedoc": "^0.25.3",
+    "typescript": "^5.2.2"
+  },
+  "license": "ISC",
+  "files": [
+    "dist"
+  ],
+  "prettier": {
+    "semi": false,
+    "printWidth": 70,
+    "tabWidth": 2,
+    "useTabs": false,
+    "singleQuote": true,
+    "jsxSingleQuote": false,
+    "bracketSameLine": true,
+    "arrowParens": "avoid",
+    "endOfLine": "lf"
+  },
+  "tap": {
+    "node-arg": [
+      "--expose-gc"
+    ],
+    "plugin": [
+      "@tapjs/clock"
+    ]
+  },
+  "exports": {
+    ".": {
+      "import": {
+        "types": "./dist/esm/index.d.ts",
+        "default": "./dist/esm/index.js"
+      },
+      "require": {
+        "types": "./dist/commonjs/index.d.ts",
+        "default": "./dist/commonjs/index.js"
+      }
+    },
+    "./min": {
+      "import": {
+        "types": "./dist/esm/index.d.ts",
+        "default": "./dist/esm/index.min.js"
+      },
+      "require": {
+        "types": "./dist/commonjs/index.d.ts",
+        "default": "./dist/commonjs/index.min.js"
+      }
+    }
+  },
+  "type": "module",
+  "module": "./dist/esm/index.js"
+}
diff --git a/mqtt-backend/node_modules/minimist/.eslintrc b/mqtt-backend/node_modules/minimist/.eslintrc
new file mode 100644
index 0000000..bd1a5e0
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/.eslintrc
@@ -0,0 +1,29 @@
+{
+	"root": true,
+
+	"extends": "@ljharb/eslint-config/node/0.4",
+
+	"rules": {
+		"array-element-newline": 0,
+		"complexity": 0,
+		"func-style": [2, "declaration"],
+		"max-lines-per-function": 0,
+		"max-nested-callbacks": 1,
+		"max-statements-per-line": 1,
+		"max-statements": 0,
+		"multiline-comment-style": 0,
+		"no-continue": 1,
+		"no-param-reassign": 1,
+		"no-restricted-syntax": 1,
+		"object-curly-newline": 0,
+	},
+
+	"overrides": [
+		{
+			"files": "test/**",
+			"rules": {
+				"camelcase": 0,
+			},
+		},
+	]
+}
diff --git a/mqtt-backend/node_modules/minimist/.github/FUNDING.yml b/mqtt-backend/node_modules/minimist/.github/FUNDING.yml
new file mode 100644
index 0000000..a936622
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/.github/FUNDING.yml
@@ -0,0 +1,12 @@
+# These are supported funding model platforms
+
+github: [ljharb]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: npm/minimist
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
diff --git a/mqtt-backend/node_modules/minimist/.nycrc b/mqtt-backend/node_modules/minimist/.nycrc
new file mode 100644
index 0000000..55c3d29
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/.nycrc
@@ -0,0 +1,14 @@
+{
+	"all": true,
+	"check-coverage": false,
+	"reporter": ["text-summary", "text", "html", "json"],
+	"lines": 86,
+	"statements": 85.93,
+	"functions": 82.43,
+	"branches": 76.06,
+	"exclude": [
+		"coverage",
+		"example",
+		"test"
+	]
+}
diff --git a/mqtt-backend/node_modules/minimist/CHANGELOG.md b/mqtt-backend/node_modules/minimist/CHANGELOG.md
new file mode 100644
index 0000000..c9a1e15
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/CHANGELOG.md
@@ -0,0 +1,298 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [v1.2.8](https://github.com/minimistjs/minimist/compare/v1.2.7...v1.2.8) - 2023-02-09
+
+### Merged
+
+- [Fix] Fix long option followed by single dash [`#17`](https://github.com/minimistjs/minimist/pull/17)
+- [Tests] Remove duplicate test [`#12`](https://github.com/minimistjs/minimist/pull/12)
+- [Fix] opt.string works with multiple aliases [`#10`](https://github.com/minimistjs/minimist/pull/10)
+
+### Fixed
+
+- [Fix] Fix long option followed by single dash (#17) [`#15`](https://github.com/minimistjs/minimist/issues/15)
+- [Tests] Remove duplicate test (#12) [`#8`](https://github.com/minimistjs/minimist/issues/8)
+- [Fix] Fix long option followed by single dash [`#15`](https://github.com/minimistjs/minimist/issues/15)
+- [Fix] opt.string works with multiple aliases (#10) [`#9`](https://github.com/minimistjs/minimist/issues/9)
+- [Fix] Fix handling of short option with non-trivial equals [`#5`](https://github.com/minimistjs/minimist/issues/5)
+- [Tests] Remove duplicate test [`#8`](https://github.com/minimistjs/minimist/issues/8)
+- [Fix] opt.string works with multiple aliases [`#9`](https://github.com/minimistjs/minimist/issues/9)
+
+### Commits
+
+- Merge tag 'v0.2.3' [`a026794`](https://github.com/minimistjs/minimist/commit/a0267947c7870fc5847cf2d437fbe33f392767da)
+- [eslint] fix indentation and whitespace [`5368ca4`](https://github.com/minimistjs/minimist/commit/5368ca4147e974138a54cc0dc4cea8f756546b70)
+- [eslint] fix indentation and whitespace [`e5f5067`](https://github.com/minimistjs/minimist/commit/e5f5067259ceeaf0b098d14bec910f87e58708c7)
+- [eslint] more cleanup [`62fde7d`](https://github.com/minimistjs/minimist/commit/62fde7d935f83417fb046741531a9e2346a36976)
+- [eslint] more cleanup [`36ac5d0`](https://github.com/minimistjs/minimist/commit/36ac5d0d95e4947d074e5737d94814034ca335d1)
+- [meta] add `auto-changelog` [`73923d2`](https://github.com/minimistjs/minimist/commit/73923d223553fca08b1ba77e3fbc2a492862ae4c)
+- [actions] add reusable workflows [`d80727d`](https://github.com/minimistjs/minimist/commit/d80727df77bfa9e631044d7f16368d8f09242c91)
+- [eslint] add eslint; rules to enable later are warnings [`48bc06a`](https://github.com/minimistjs/minimist/commit/48bc06a1b41f00e9cdf183db34f7a51ba70e98d4)
+- [eslint] fix indentation [`34b0f1c`](https://github.com/minimistjs/minimist/commit/34b0f1ccaa45183c3c4f06a91f9b405180a6f982)
+- [readme] rename and add badges [`5df0fe4`](https://github.com/minimistjs/minimist/commit/5df0fe49211bd09a3636f8686a7cb3012c3e98f0)
+- [Dev Deps] switch from `covert` to `nyc` [`a48b128`](https://github.com/minimistjs/minimist/commit/a48b128fdb8d427dfb20a15273f83e38d97bef07)
+- [Dev Deps] update `covert`, `tape`; remove unnecessary `tap` [`f0fb958`](https://github.com/minimistjs/minimist/commit/f0fb958e9a1fe980cdffc436a211b0bda58f621b)
+- [meta] create FUNDING.yml; add `funding` in package.json [`3639e0c`](https://github.com/minimistjs/minimist/commit/3639e0c819359a366387e425ab6eabf4c78d3caa)
+- [meta] use `npmignore` to autogenerate an npmignore file [`be2e038`](https://github.com/minimistjs/minimist/commit/be2e038c342d8333b32f0fde67a0026b79c8150e)
+- Only apps should have lockfiles [`282b570`](https://github.com/minimistjs/minimist/commit/282b570e7489d01b03f2d6d3dabf79cd3e5f84cf)
+- isConstructorOrProto adapted from PR [`ef9153f`](https://github.com/minimistjs/minimist/commit/ef9153fc52b6cea0744b2239921c5dcae4697f11)
+- [Dev Deps] update `@ljharb/eslint-config`, `aud` [`098873c`](https://github.com/minimistjs/minimist/commit/098873c213cdb7c92e55ae1ef5aa1af3a8192a79)
+- [Dev Deps] update `@ljharb/eslint-config`, `aud` [`3124ed3`](https://github.com/minimistjs/minimist/commit/3124ed3e46306301ebb3c834874ce0241555c2c4)
+- [meta] add `safe-publish-latest` [`4b927de`](https://github.com/minimistjs/minimist/commit/4b927de696d561c636b4f43bf49d4597cb36d6d6)
+- [Tests] add `aud` in `posttest` [`b32d9bd`](https://github.com/minimistjs/minimist/commit/b32d9bd0ab340f4e9f8c3a97ff2a4424f25fab8c)
+- [meta] update repo URLs [`f9fdfc0`](https://github.com/minimistjs/minimist/commit/f9fdfc032c54884d9a9996a390c63cd0719bbe1a)
+- [actions] Avoid 0.6 tests due to build failures [`ba92fe6`](https://github.com/minimistjs/minimist/commit/ba92fe6ebbdc0431cca9a2ea8f27beb492f5e4ec)
+- [Dev Deps] update `tape` [`950eaa7`](https://github.com/minimistjs/minimist/commit/950eaa74f112e04d23e9c606c67472c46739b473)
+- [Dev Deps] add missing `npmignore` dev dep [`3226afa`](https://github.com/minimistjs/minimist/commit/3226afaf09e9d127ca369742437fe6e88f752d6b)
+- Merge tag 'v0.2.2' [`980d7ac`](https://github.com/minimistjs/minimist/commit/980d7ac61a0b4bd552711251ac107d506b23e41f)
+
+## [v1.2.7](https://github.com/minimistjs/minimist/compare/v1.2.6...v1.2.7) - 2022-10-10
+
+### Commits
+
+- [meta] add `auto-changelog` [`0ebf4eb`](https://github.com/minimistjs/minimist/commit/0ebf4ebcd5f7787a5524d31a849ef41316b83c3c)
+- [actions] add reusable workflows [`e115b63`](https://github.com/minimistjs/minimist/commit/e115b63fa9d3909f33b00a2db647ff79068388de)
+- [eslint] add eslint; rules to enable later are warnings [`f58745b`](https://github.com/minimistjs/minimist/commit/f58745b9bb84348e1be72af7dbba5840c7c13013)
+- [Dev Deps] switch from `covert` to `nyc` [`ab03356`](https://github.com/minimistjs/minimist/commit/ab033567b9c8b31117cb026dc7f1e592ce455c65)
+- [readme] rename and add badges [`236f4a0`](https://github.com/minimistjs/minimist/commit/236f4a07e4ebe5ee44f1496ec6974991ab293ffd)
+- [meta] create FUNDING.yml; add `funding` in package.json [`783a49b`](https://github.com/minimistjs/minimist/commit/783a49bfd47e8335d3098a8cac75662cf71eb32a)
+- [meta] use `npmignore` to autogenerate an npmignore file [`f81ece6`](https://github.com/minimistjs/minimist/commit/f81ece6aaec2fa14e69ff4f1e0407a8c4e2635a2)
+- Only apps should have lockfiles [`56cad44`](https://github.com/minimistjs/minimist/commit/56cad44c7f879b9bb5ec18fcc349308024a89bfc)
+- [Dev Deps] update `covert`, `tape`; remove unnecessary `tap` [`49c5f9f`](https://github.com/minimistjs/minimist/commit/49c5f9fb7e6a92db9eb340cc679de92fb3aacded)
+- [Tests] add `aud` in `posttest` [`228ae93`](https://github.com/minimistjs/minimist/commit/228ae938f3cd9db9dfd8bd7458b076a7b2aef280)
+- [meta] add `safe-publish-latest` [`01fc23f`](https://github.com/minimistjs/minimist/commit/01fc23f5104f85c75059972e01dd33796ab529ff)
+- [meta] update repo URLs [`6b164c7`](https://github.com/minimistjs/minimist/commit/6b164c7d68e0b6bf32f894699effdfb7c63041dd)
+
+## [v1.2.6](https://github.com/minimistjs/minimist/compare/v1.2.5...v1.2.6) - 2022-03-21
+
+### Commits
+
+- test from prototype pollution PR [`bc8ecee`](https://github.com/minimistjs/minimist/commit/bc8ecee43875261f4f17eb20b1243d3ed15e70eb)
+- isConstructorOrProto adapted from PR [`c2b9819`](https://github.com/minimistjs/minimist/commit/c2b981977fa834b223b408cfb860f933c9811e4d)
+- security notice for additional prototype pollution issue [`ef88b93`](https://github.com/minimistjs/minimist/commit/ef88b9325f77b5ee643ccfc97e2ebda577e4c4e2)
+
+## [v1.2.5](https://github.com/minimistjs/minimist/compare/v1.2.4...v1.2.5) - 2020-03-12
+
+## [v1.2.4](https://github.com/minimistjs/minimist/compare/v1.2.3...v1.2.4) - 2020-03-11
+
+### Commits
+
+- security notice [`4cf1354`](https://github.com/minimistjs/minimist/commit/4cf1354839cb972e38496d35e12f806eea92c11f)
+- additional test for constructor prototype pollution [`1043d21`](https://github.com/minimistjs/minimist/commit/1043d212c3caaf871966e710f52cfdf02f9eea4b)
+
+## [v1.2.3](https://github.com/minimistjs/minimist/compare/v1.2.2...v1.2.3) - 2020-03-10
+
+### Commits
+
+- more failing proto pollution tests [`13c01a5`](https://github.com/minimistjs/minimist/commit/13c01a5327736903704984b7f65616b8476850cc)
+- even more aggressive checks for protocol pollution [`38a4d1c`](https://github.com/minimistjs/minimist/commit/38a4d1caead72ef99e824bb420a2528eec03d9ab)
+
+## [v1.2.2](https://github.com/minimistjs/minimist/compare/v1.2.1...v1.2.2) - 2020-03-10
+
+### Commits
+
+- failing test for protocol pollution [`0efed03`](https://github.com/minimistjs/minimist/commit/0efed0340ec8433638758f7ca0c77cb20a0bfbab)
+- cleanup [`67d3722`](https://github.com/minimistjs/minimist/commit/67d3722413448d00a62963d2d30c34656a92d7e2)
+- console.dir -&gt; console.log [`47acf72`](https://github.com/minimistjs/minimist/commit/47acf72c715a630bf9ea013867f47f1dd69dfc54)
+- don't assign onto __proto__ [`63e7ed0`](https://github.com/minimistjs/minimist/commit/63e7ed05aa4b1889ec2f3b196426db4500cbda94)
+
+## [v1.2.1](https://github.com/minimistjs/minimist/compare/v1.2.0...v1.2.1) - 2020-03-10
+
+### Merged
+
+- move the `opts['--']` example back where it belongs [`#63`](https://github.com/minimistjs/minimist/pull/63)
+
+### Commits
+
+- add test [`6be5dae`](https://github.com/minimistjs/minimist/commit/6be5dae35a32a987bcf4137fcd6c19c5200ee909)
+- fix bad boolean regexp [`ac3fc79`](https://github.com/minimistjs/minimist/commit/ac3fc796e63b95128fdbdf67ea7fad71bd59aa76)
+
+## [v1.2.0](https://github.com/minimistjs/minimist/compare/v1.1.3...v1.2.0) - 2015-08-24
+
+### Commits
+
+- failing -k=v short test [`63416b8`](https://github.com/minimistjs/minimist/commit/63416b8cd1d0d70e4714564cce465a36e4dd26d7)
+- kv short fix [`6bbe145`](https://github.com/minimistjs/minimist/commit/6bbe14529166245e86424f220a2321442fe88dc3)
+- failing kv short test [`f72ab7f`](https://github.com/minimistjs/minimist/commit/f72ab7f4572adc52902c9b6873cc969192f01b10)
+- fixed kv test [`f5a48c3`](https://github.com/minimistjs/minimist/commit/f5a48c3e50e40ca54f00c8e84de4b4d6e9897fa8)
+- enforce space between arg key and value [`86b321a`](https://github.com/minimistjs/minimist/commit/86b321affe648a8e016c095a4f0efa9d9074f502)
+
+## [v1.1.3](https://github.com/minimistjs/minimist/compare/v1.1.2...v1.1.3) - 2015-08-06
+
+### Commits
+
+- add failing test - boolean alias array [`0fa3c5b`](https://github.com/minimistjs/minimist/commit/0fa3c5b3dd98551ddecf5392831b4c21211743fc)
+- fix boolean values with multiple aliases [`9c0a6e7`](https://github.com/minimistjs/minimist/commit/9c0a6e7de25a273b11bbf9a7464f0bd833779795)
+
+## [v1.1.2](https://github.com/minimistjs/minimist/compare/v1.1.1...v1.1.2) - 2015-07-22
+
+### Commits
+
+- Convert boolean arguments to boolean values [`8f3dc27`](https://github.com/minimistjs/minimist/commit/8f3dc27cf833f1d54671b6d0bcb55c2fe19672a9)
+- use non-ancient npm, node 0.12 and iojs [`61ed1d0`](https://github.com/minimistjs/minimist/commit/61ed1d034b9ec7282764ce76f3992b1a0b4906ae)
+- an older npm for 0.8 [`25cf778`](https://github.com/minimistjs/minimist/commit/25cf778b1220e7838a526832ad6972f75244054f)
+
+## [v1.1.1](https://github.com/minimistjs/minimist/compare/v1.1.0...v1.1.1) - 2015-03-10
+
+### Commits
+
+- check that they type of a value is a boolean, not just that it is currently set to a boolean [`6863198`](https://github.com/minimistjs/minimist/commit/6863198e36139830ff1f20ffdceaddd93f2c1db9)
+- upgrade tape, fix type issues from old tape version [`806712d`](https://github.com/minimistjs/minimist/commit/806712df91604ed02b8e39aa372b84aea659ee34)
+- test for setting a boolean to a null default [`8c444fe`](https://github.com/minimistjs/minimist/commit/8c444fe89384ded7d441c120915ea60620b01dd3)
+- if the previous value was a boolean, without an default (or with an alias) don't make an array either [`e5f419a`](https://github.com/minimistjs/minimist/commit/e5f419a3b5b3bc3f9e5ac71b7040621af70ed2dd)
+
+## [v1.1.0](https://github.com/minimistjs/minimist/compare/v1.0.0...v1.1.0) - 2014-08-10
+
+### Commits
+
+- add support for handling "unknown" options not registered with the parser. [`6f3cc5d`](https://github.com/minimistjs/minimist/commit/6f3cc5d4e84524932a6ef2ce3592acc67cdd4383)
+- reformat package.json [`02ed371`](https://github.com/minimistjs/minimist/commit/02ed37115194d3697ff358e8e25e5e66bab1d9f8)
+- coverage script [`e5531ba`](https://github.com/minimistjs/minimist/commit/e5531ba0479da3b8138d3d8cac545d84ccb1c8df)
+- extra fn to get 100% coverage again [`a6972da`](https://github.com/minimistjs/minimist/commit/a6972da89e56bf77642f8ec05a13b6558db93498)
+
+## [v1.0.0](https://github.com/minimistjs/minimist/compare/v0.2.3...v1.0.0) - 2014-08-10
+
+### Commits
+
+- added stopEarly option [`471c7e4`](https://github.com/minimistjs/minimist/commit/471c7e4a7e910fc7ad8f9df850a186daf32c64e9)
+- fix list [`fef6ae7`](https://github.com/minimistjs/minimist/commit/fef6ae79c38b9dc1c49569abb7cd04eb965eac5e)
+
+## [v0.2.3](https://github.com/minimistjs/minimist/compare/v0.2.2...v0.2.3) - 2023-02-09
+
+### Merged
+
+- [Fix] Fix long option followed by single dash [`#17`](https://github.com/minimistjs/minimist/pull/17)
+- [Tests] Remove duplicate test [`#12`](https://github.com/minimistjs/minimist/pull/12)
+- [Fix] opt.string works with multiple aliases [`#10`](https://github.com/minimistjs/minimist/pull/10)
+
+### Fixed
+
+- [Fix] Fix long option followed by single dash (#17) [`#15`](https://github.com/minimistjs/minimist/issues/15)
+- [Tests] Remove duplicate test (#12) [`#8`](https://github.com/minimistjs/minimist/issues/8)
+- [Fix] opt.string works with multiple aliases (#10) [`#9`](https://github.com/minimistjs/minimist/issues/9)
+
+### Commits
+
+- [eslint] fix indentation and whitespace [`e5f5067`](https://github.com/minimistjs/minimist/commit/e5f5067259ceeaf0b098d14bec910f87e58708c7)
+- [eslint] more cleanup [`36ac5d0`](https://github.com/minimistjs/minimist/commit/36ac5d0d95e4947d074e5737d94814034ca335d1)
+- [eslint] fix indentation [`34b0f1c`](https://github.com/minimistjs/minimist/commit/34b0f1ccaa45183c3c4f06a91f9b405180a6f982)
+- isConstructorOrProto adapted from PR [`ef9153f`](https://github.com/minimistjs/minimist/commit/ef9153fc52b6cea0744b2239921c5dcae4697f11)
+- [Dev Deps] update `@ljharb/eslint-config`, `aud` [`098873c`](https://github.com/minimistjs/minimist/commit/098873c213cdb7c92e55ae1ef5aa1af3a8192a79)
+- [Dev Deps] add missing `npmignore` dev dep [`3226afa`](https://github.com/minimistjs/minimist/commit/3226afaf09e9d127ca369742437fe6e88f752d6b)
+
+## [v0.2.2](https://github.com/minimistjs/minimist/compare/v0.2.1...v0.2.2) - 2022-10-10
+
+### Commits
+
+- [meta] add `auto-changelog` [`73923d2`](https://github.com/minimistjs/minimist/commit/73923d223553fca08b1ba77e3fbc2a492862ae4c)
+- [actions] add reusable workflows [`d80727d`](https://github.com/minimistjs/minimist/commit/d80727df77bfa9e631044d7f16368d8f09242c91)
+- [eslint] add eslint; rules to enable later are warnings [`48bc06a`](https://github.com/minimistjs/minimist/commit/48bc06a1b41f00e9cdf183db34f7a51ba70e98d4)
+- [readme] rename and add badges [`5df0fe4`](https://github.com/minimistjs/minimist/commit/5df0fe49211bd09a3636f8686a7cb3012c3e98f0)
+- [Dev Deps] switch from `covert` to `nyc` [`a48b128`](https://github.com/minimistjs/minimist/commit/a48b128fdb8d427dfb20a15273f83e38d97bef07)
+- [Dev Deps] update `covert`, `tape`; remove unnecessary `tap` [`f0fb958`](https://github.com/minimistjs/minimist/commit/f0fb958e9a1fe980cdffc436a211b0bda58f621b)
+- [meta] create FUNDING.yml; add `funding` in package.json [`3639e0c`](https://github.com/minimistjs/minimist/commit/3639e0c819359a366387e425ab6eabf4c78d3caa)
+- [meta] use `npmignore` to autogenerate an npmignore file [`be2e038`](https://github.com/minimistjs/minimist/commit/be2e038c342d8333b32f0fde67a0026b79c8150e)
+- Only apps should have lockfiles [`282b570`](https://github.com/minimistjs/minimist/commit/282b570e7489d01b03f2d6d3dabf79cd3e5f84cf)
+- [meta] add `safe-publish-latest` [`4b927de`](https://github.com/minimistjs/minimist/commit/4b927de696d561c636b4f43bf49d4597cb36d6d6)
+- [Tests] add `aud` in `posttest` [`b32d9bd`](https://github.com/minimistjs/minimist/commit/b32d9bd0ab340f4e9f8c3a97ff2a4424f25fab8c)
+- [meta] update repo URLs [`f9fdfc0`](https://github.com/minimistjs/minimist/commit/f9fdfc032c54884d9a9996a390c63cd0719bbe1a)
+
+## [v0.2.1](https://github.com/minimistjs/minimist/compare/v0.2.0...v0.2.1) - 2020-03-12
+
+## [v0.2.0](https://github.com/minimistjs/minimist/compare/v0.1.0...v0.2.0) - 2014-06-19
+
+### Commits
+
+- support all-boolean mode [`450a97f`](https://github.com/minimistjs/minimist/commit/450a97f6e2bc85c7a4a13185c19a818d9a5ebe69)
+
+## [v0.1.0](https://github.com/minimistjs/minimist/compare/v0.0.10...v0.1.0) - 2014-05-12
+
+### Commits
+
+- Provide a mechanism to segregate -- arguments [`ce4a1e6`](https://github.com/minimistjs/minimist/commit/ce4a1e63a7e8d5ab88d2a3768adefa6af98a445a)
+- documented argv['--'] [`14db0e6`](https://github.com/minimistjs/minimist/commit/14db0e6dbc6d2b9e472adaa54dad7004b364634f)
+- Adding a test-case for notFlags segregation [`715c1e3`](https://github.com/minimistjs/minimist/commit/715c1e3714be223f998f6c537af6b505f0236c16)
+
+## [v0.0.10](https://github.com/minimistjs/minimist/compare/v0.0.9...v0.0.10) - 2014-05-11
+
+### Commits
+
+- dedicated boolean test [`46e448f`](https://github.com/minimistjs/minimist/commit/46e448f9f513cfeb2bcc8b688b9b47ba1e515c2b)
+- dedicated num test [`9bf2d36`](https://github.com/minimistjs/minimist/commit/9bf2d36f1d3b8795be90b8f7de0a937f098aa394)
+- aliased values treated as strings [`1ab743b`](https://github.com/minimistjs/minimist/commit/1ab743bad4484d69f1259bed42f9531de01119de)
+- cover the case of already numbers, at 100% coverage [`b2bb044`](https://github.com/minimistjs/minimist/commit/b2bb04436599d77a2ce029e8e555e25b3aa55d13)
+- another test for higher coverage [`3662624`](https://github.com/minimistjs/minimist/commit/3662624be976d5489d486a856849c048d13be903)
+
+## [v0.0.9](https://github.com/minimistjs/minimist/compare/v0.0.8...v0.0.9) - 2014-05-08
+
+### Commits
+
+- Eliminate `longest` fn. [`824f642`](https://github.com/minimistjs/minimist/commit/824f642038d1b02ede68b6261d1d65163390929a)
+
+## [v0.0.8](https://github.com/minimistjs/minimist/compare/v0.0.7...v0.0.8) - 2014-02-20
+
+### Commits
+
+- return '' if flag is string and empty [`fa63ed4`](https://github.com/minimistjs/minimist/commit/fa63ed4651a4ef4eefddce34188e0d98d745a263)
+- handle joined single letters [`66c248f`](https://github.com/minimistjs/minimist/commit/66c248f0241d4d421d193b022e9e365f11178534)
+
+## [v0.0.7](https://github.com/minimistjs/minimist/compare/v0.0.6...v0.0.7) - 2014-02-08
+
+### Commits
+
+- another swap of .test for .match [`d1da408`](https://github.com/minimistjs/minimist/commit/d1da40819acbe846d89a5c02721211e3c1260dde)
+
+## [v0.0.6](https://github.com/minimistjs/minimist/compare/v0.0.5...v0.0.6) - 2014-02-08
+
+### Commits
+
+- use .test() instead of .match() to not crash on non-string values in the arguments array [`7e0d1ad`](https://github.com/minimistjs/minimist/commit/7e0d1add8c9e5b9b20a4d3d0f9a94d824c578da1)
+
+## [v0.0.5](https://github.com/minimistjs/minimist/compare/v0.0.4...v0.0.5) - 2013-09-18
+
+### Commits
+
+- Improve '--' handling. [`b11822c`](https://github.com/minimistjs/minimist/commit/b11822c09cc9d2460f30384d12afc0b953c037a4)
+
+## [v0.0.4](https://github.com/minimistjs/minimist/compare/v0.0.3...v0.0.4) - 2013-09-17
+
+## [v0.0.3](https://github.com/minimistjs/minimist/compare/v0.0.2...v0.0.3) - 2013-09-12
+
+### Commits
+
+- failing test for single dash preceeding a double dash [`b465514`](https://github.com/minimistjs/minimist/commit/b465514b82c9ae28972d714facd951deb2ad762b)
+- fix for the dot test [`6a095f1`](https://github.com/minimistjs/minimist/commit/6a095f1d364c8fab2d6753d2291a0649315d297a)
+
+## [v0.0.2](https://github.com/minimistjs/minimist/compare/v0.0.1...v0.0.2) - 2013-08-28
+
+### Commits
+
+- allow dotted aliases & defaults [`321c33e`](https://github.com/minimistjs/minimist/commit/321c33e755485faaeb44eeb1c05d33b2e0a5a7c4)
+- use a better version of ff [`e40f611`](https://github.com/minimistjs/minimist/commit/e40f61114cf7be6f7947f7b3eed345853a67dbbb)
+
+## [v0.0.1](https://github.com/minimistjs/minimist/compare/v0.0.0...v0.0.1) - 2013-06-25
+
+### Commits
+
+- remove trailing commas [`6ff0fa0`](https://github.com/minimistjs/minimist/commit/6ff0fa055064f15dbe06d50b89d5173a6796e1db)
+
+## v0.0.0 - 2013-06-25
+
+### Commits
+
+- half of the parse test ported [`3079326`](https://github.com/minimistjs/minimist/commit/307932601325087de6cf94188eb798ffc4f3088a)
+- stripped down code and a passing test from optimist [`7cced88`](https://github.com/minimistjs/minimist/commit/7cced88d82e399d1a03ed23eb667f04d3f320d10)
+- ported parse tests completely over [`9448754`](https://github.com/minimistjs/minimist/commit/944875452e0820df6830b1408c26a0f7d3e1db04)
+- docs, package.json [`a5bf46a`](https://github.com/minimistjs/minimist/commit/a5bf46ac9bb3bd114a9c340276c62c1091e538d5)
+- move more short tests into short.js [`503edb5`](https://github.com/minimistjs/minimist/commit/503edb5c41d89c0d40831ee517154fc13b0f18b9)
+- default bool test was wrong, not the code [`1b9f5db`](https://github.com/minimistjs/minimist/commit/1b9f5db4741b49962846081b68518de824992097)
+- passing long tests ripped out of parse.js [`7972c4a`](https://github.com/minimistjs/minimist/commit/7972c4aff1f4803079e1668006658e2a761a0428)
+- badges [`84c0370`](https://github.com/minimistjs/minimist/commit/84c037063664d42878aace715fe6572ce01b6f3b)
+- all the tests now ported, some failures [`64239ed`](https://github.com/minimistjs/minimist/commit/64239edfe92c711c4eb0da254fcdfad2a5fdb605)
+- failing short test [`f8a5341`](https://github.com/minimistjs/minimist/commit/f8a534112dd1138d2fad722def56a848480c446f)
+- fixed the numeric test [`6b034f3`](https://github.com/minimistjs/minimist/commit/6b034f37c79342c60083ed97fd222e16928aac51)
diff --git a/mqtt-backend/node_modules/minimist/LICENSE b/mqtt-backend/node_modules/minimist/LICENSE
new file mode 100644
index 0000000..ee27ba4
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/LICENSE
@@ -0,0 +1,18 @@
+This software is released under the MIT license:
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/minimist/README.md b/mqtt-backend/node_modules/minimist/README.md
new file mode 100644
index 0000000..74da323
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/README.md
@@ -0,0 +1,121 @@
+# minimist <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
+
+[![github actions][actions-image]][actions-url]
+[![coverage][codecov-image]][codecov-url]
+[![License][license-image]][license-url]
+[![Downloads][downloads-image]][downloads-url]
+
+[![npm badge][npm-badge-png]][package-url]
+
+parse argument options
+
+This module is the guts of optimist's argument parser without all the
+fanciful decoration.
+
+# example
+
+``` js
+var argv = require('minimist')(process.argv.slice(2));
+console.log(argv);
+```
+
+```
+$ node example/parse.js -a beep -b boop
+{ _: [], a: 'beep', b: 'boop' }
+```
+
+```
+$ node example/parse.js -x 3 -y 4 -n5 -abc --beep=boop foo bar baz
+{
+	_: ['foo', 'bar', 'baz'],
+	x: 3,
+	y: 4,
+	n: 5,
+	a: true,
+	b: true,
+	c: true,
+	beep: 'boop'
+}
+```
+
+# security
+
+Previous versions had a prototype pollution bug that could cause privilege
+escalation in some circumstances when handling untrusted user input.
+
+Please use version 1.2.6 or later:
+
+* https://security.snyk.io/vuln/SNYK-JS-MINIMIST-2429795 (version <=1.2.5)
+* https://snyk.io/vuln/SNYK-JS-MINIMIST-559764 (version <=1.2.3)
+
+# methods
+
+``` js
+var parseArgs = require('minimist')
+```
+
+## var argv = parseArgs(args, opts={})
+
+Return an argument object `argv` populated with the array arguments from `args`.
+
+`argv._` contains all the arguments that didn't have an option associated with
+them.
+
+Numeric-looking arguments will be returned as numbers unless `opts.string` or
+`opts.boolean` is set for that argument name.
+
+Any arguments after `'--'` will not be parsed and will end up in `argv._`.
+
+options can be:
+
+* `opts.string` - a string or array of strings argument names to always treat as
+strings
+* `opts.boolean` - a boolean, string or array of strings to always treat as
+booleans. if `true` will treat all double hyphenated arguments without equal signs
+as boolean (e.g. affects `--foo`, not `-f` or `--foo=bar`)
+* `opts.alias` - an object mapping string names to strings or arrays of string
+argument names to use as aliases
+* `opts.default` - an object mapping string argument names to default values
+* `opts.stopEarly` - when true, populate `argv._` with everything after the
+first non-option
+* `opts['--']` - when true, populate `argv._` with everything before the `--`
+and `argv['--']` with everything after the `--`. Here's an example:
+
+  ```
+  > require('./')('one two three -- four five --six'.split(' '), { '--': true })
+  {
+    _: ['one', 'two', 'three'],
+    '--': ['four', 'five', '--six']
+  }
+  ```
+
+  Note that with `opts['--']` set, parsing for arguments still stops after the
+  `--`.
+
+* `opts.unknown` - a function which is invoked with a command line parameter not
+defined in the `opts` configuration object. If the function returns `false`, the
+unknown option is not added to `argv`.
+
+# install
+
+With [npm](https://npmjs.org) do:
+
+```
+npm install minimist
+```
+
+# license
+
+MIT
+
+[package-url]: https://npmjs.org/package/minimist
+[npm-version-svg]: https://versionbadg.es/minimistjs/minimist.svg
+[npm-badge-png]: https://nodei.co/npm/minimist.png?downloads=true&stars=true
+[license-image]: https://img.shields.io/npm/l/minimist.svg
+[license-url]: LICENSE
+[downloads-image]: https://img.shields.io/npm/dm/minimist.svg
+[downloads-url]: https://npm-stat.com/charts.html?package=minimist
+[codecov-image]: https://codecov.io/gh/minimistjs/minimist/branch/main/graphs/badge.svg
+[codecov-url]: https://app.codecov.io/gh/minimistjs/minimist/
+[actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/minimistjs/minimist
+[actions-url]: https://github.com/minimistjs/minimist/actions
diff --git a/mqtt-backend/node_modules/minimist/example/parse.js b/mqtt-backend/node_modules/minimist/example/parse.js
new file mode 100644
index 0000000..9d90ffb
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/example/parse.js
@@ -0,0 +1,4 @@
+'use strict';
+
+var argv = require('../')(process.argv.slice(2));
+console.log(argv);
diff --git a/mqtt-backend/node_modules/minimist/index.js b/mqtt-backend/node_modules/minimist/index.js
new file mode 100644
index 0000000..f020f39
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/index.js
@@ -0,0 +1,263 @@
+'use strict';
+
+function hasKey(obj, keys) {
+	var o = obj;
+	keys.slice(0, -1).forEach(function (key) {
+		o = o[key] || {};
+	});
+
+	var key = keys[keys.length - 1];
+	return key in o;
+}
+
+function isNumber(x) {
+	if (typeof x === 'number') { return true; }
+	if ((/^0x[0-9a-f]+$/i).test(x)) { return true; }
+	return (/^[-+]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/).test(x);
+}
+
+function isConstructorOrProto(obj, key) {
+	return (key === 'constructor' && typeof obj[key] === 'function') || key === '__proto__';
+}
+
+module.exports = function (args, opts) {
+	if (!opts) { opts = {}; }
+
+	var flags = {
+		bools: {},
+		strings: {},
+		unknownFn: null,
+	};
+
+	if (typeof opts.unknown === 'function') {
+		flags.unknownFn = opts.unknown;
+	}
+
+	if (typeof opts.boolean === 'boolean' && opts.boolean) {
+		flags.allBools = true;
+	} else {
+		[].concat(opts.boolean).filter(Boolean).forEach(function (key) {
+			flags.bools[key] = true;
+		});
+	}
+
+	var aliases = {};
+
+	function aliasIsBoolean(key) {
+		return aliases[key].some(function (x) {
+			return flags.bools[x];
+		});
+	}
+
+	Object.keys(opts.alias || {}).forEach(function (key) {
+		aliases[key] = [].concat(opts.alias[key]);
+		aliases[key].forEach(function (x) {
+			aliases[x] = [key].concat(aliases[key].filter(function (y) {
+				return x !== y;
+			}));
+		});
+	});
+
+	[].concat(opts.string).filter(Boolean).forEach(function (key) {
+		flags.strings[key] = true;
+		if (aliases[key]) {
+			[].concat(aliases[key]).forEach(function (k) {
+				flags.strings[k] = true;
+			});
+		}
+	});
+
+	var defaults = opts.default || {};
+
+	var argv = { _: [] };
+
+	function argDefined(key, arg) {
+		return (flags.allBools && (/^--[^=]+$/).test(arg))
+			|| flags.strings[key]
+			|| flags.bools[key]
+			|| aliases[key];
+	}
+
+	function setKey(obj, keys, value) {
+		var o = obj;
+		for (var i = 0; i < keys.length - 1; i++) {
+			var key = keys[i];
+			if (isConstructorOrProto(o, key)) { return; }
+			if (o[key] === undefined) { o[key] = {}; }
+			if (
+				o[key] === Object.prototype
+				|| o[key] === Number.prototype
+				|| o[key] === String.prototype
+			) {
+				o[key] = {};
+			}
+			if (o[key] === Array.prototype) { o[key] = []; }
+			o = o[key];
+		}
+
+		var lastKey = keys[keys.length - 1];
+		if (isConstructorOrProto(o, lastKey)) { return; }
+		if (
+			o === Object.prototype
+			|| o === Number.prototype
+			|| o === String.prototype
+		) {
+			o = {};
+		}
+		if (o === Array.prototype) { o = []; }
+		if (o[lastKey] === undefined || flags.bools[lastKey] || typeof o[lastKey] === 'boolean') {
+			o[lastKey] = value;
+		} else if (Array.isArray(o[lastKey])) {
+			o[lastKey].push(value);
+		} else {
+			o[lastKey] = [o[lastKey], value];
+		}
+	}
+
+	function setArg(key, val, arg) {
+		if (arg && flags.unknownFn && !argDefined(key, arg)) {
+			if (flags.unknownFn(arg) === false) { return; }
+		}
+
+		var value = !flags.strings[key] && isNumber(val)
+			? Number(val)
+			: val;
+		setKey(argv, key.split('.'), value);
+
+		(aliases[key] || []).forEach(function (x) {
+			setKey(argv, x.split('.'), value);
+		});
+	}
+
+	Object.keys(flags.bools).forEach(function (key) {
+		setArg(key, defaults[key] === undefined ? false : defaults[key]);
+	});
+
+	var notFlags = [];
+
+	if (args.indexOf('--') !== -1) {
+		notFlags = args.slice(args.indexOf('--') + 1);
+		args = args.slice(0, args.indexOf('--'));
+	}
+
+	for (var i = 0; i < args.length; i++) {
+		var arg = args[i];
+		var key;
+		var next;
+
+		if ((/^--.+=/).test(arg)) {
+			// Using [\s\S] instead of . because js doesn't support the
+			// 'dotall' regex modifier. See:
+			// http://stackoverflow.com/a/1068308/13216
+			var m = arg.match(/^--([^=]+)=([\s\S]*)$/);
+			key = m[1];
+			var value = m[2];
+			if (flags.bools[key]) {
+				value = value !== 'false';
+			}
+			setArg(key, value, arg);
+		} else if ((/^--no-.+/).test(arg)) {
+			key = arg.match(/^--no-(.+)/)[1];
+			setArg(key, false, arg);
+		} else if ((/^--.+/).test(arg)) {
+			key = arg.match(/^--(.+)/)[1];
+			next = args[i + 1];
+			if (
+				next !== undefined
+				&& !(/^(-|--)[^-]/).test(next)
+				&& !flags.bools[key]
+				&& !flags.allBools
+				&& (aliases[key] ? !aliasIsBoolean(key) : true)
+			) {
+				setArg(key, next, arg);
+				i += 1;
+			} else if ((/^(true|false)$/).test(next)) {
+				setArg(key, next === 'true', arg);
+				i += 1;
+			} else {
+				setArg(key, flags.strings[key] ? '' : true, arg);
+			}
+		} else if ((/^-[^-]+/).test(arg)) {
+			var letters = arg.slice(1, -1).split('');
+
+			var broken = false;
+			for (var j = 0; j < letters.length; j++) {
+				next = arg.slice(j + 2);
+
+				if (next === '-') {
+					setArg(letters[j], next, arg);
+					continue;
+				}
+
+				if ((/[A-Za-z]/).test(letters[j]) && next[0] === '=') {
+					setArg(letters[j], next.slice(1), arg);
+					broken = true;
+					break;
+				}
+
+				if (
+					(/[A-Za-z]/).test(letters[j])
+					&& (/-?\d+(\.\d*)?(e-?\d+)?$/).test(next)
+				) {
+					setArg(letters[j], next, arg);
+					broken = true;
+					break;
+				}
+
+				if (letters[j + 1] && letters[j + 1].match(/\W/)) {
+					setArg(letters[j], arg.slice(j + 2), arg);
+					broken = true;
+					break;
+				} else {
+					setArg(letters[j], flags.strings[letters[j]] ? '' : true, arg);
+				}
+			}
+
+			key = arg.slice(-1)[0];
+			if (!broken && key !== '-') {
+				if (
+					args[i + 1]
+					&& !(/^(-|--)[^-]/).test(args[i + 1])
+					&& !flags.bools[key]
+					&& (aliases[key] ? !aliasIsBoolean(key) : true)
+				) {
+					setArg(key, args[i + 1], arg);
+					i += 1;
+				} else if (args[i + 1] && (/^(true|false)$/).test(args[i + 1])) {
+					setArg(key, args[i + 1] === 'true', arg);
+					i += 1;
+				} else {
+					setArg(key, flags.strings[key] ? '' : true, arg);
+				}
+			}
+		} else {
+			if (!flags.unknownFn || flags.unknownFn(arg) !== false) {
+				argv._.push(flags.strings._ || !isNumber(arg) ? arg : Number(arg));
+			}
+			if (opts.stopEarly) {
+				argv._.push.apply(argv._, args.slice(i + 1));
+				break;
+			}
+		}
+	}
+
+	Object.keys(defaults).forEach(function (k) {
+		if (!hasKey(argv, k.split('.'))) {
+			setKey(argv, k.split('.'), defaults[k]);
+
+			(aliases[k] || []).forEach(function (x) {
+				setKey(argv, x.split('.'), defaults[k]);
+			});
+		}
+	});
+
+	if (opts['--']) {
+		argv['--'] = notFlags.slice();
+	} else {
+		notFlags.forEach(function (k) {
+			argv._.push(k);
+		});
+	}
+
+	return argv;
+};
diff --git a/mqtt-backend/node_modules/minimist/package.json b/mqtt-backend/node_modules/minimist/package.json
new file mode 100644
index 0000000..c10a334
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/package.json
@@ -0,0 +1,75 @@
+{
+	"name": "minimist",
+	"version": "1.2.8",
+	"description": "parse argument options",
+	"main": "index.js",
+	"devDependencies": {
+		"@ljharb/eslint-config": "^21.0.1",
+		"aud": "^2.0.2",
+		"auto-changelog": "^2.4.0",
+		"eslint": "=8.8.0",
+		"in-publish": "^2.0.1",
+		"npmignore": "^0.3.0",
+		"nyc": "^10.3.2",
+		"safe-publish-latest": "^2.0.0",
+		"tape": "^5.6.3"
+	},
+	"scripts": {
+		"prepack": "npmignore --auto --commentLines=auto",
+		"prepublishOnly": "safe-publish-latest",
+		"prepublish": "not-in-publish || npm run prepublishOnly",
+		"lint": "eslint --ext=js,mjs .",
+		"pretest": "npm run lint",
+		"tests-only": "nyc tape 'test/**/*.js'",
+		"test": "npm run tests-only",
+		"posttest": "aud --production",
+		"version": "auto-changelog && git add CHANGELOG.md",
+		"postversion": "auto-changelog && git add CHANGELOG.md && git commit --no-edit --amend && git tag -f \"v$(node -e \"console.log(require('./package.json').version)\")\""
+	},
+	"testling": {
+		"files": "test/*.js",
+		"browsers": [
+			"ie/6..latest",
+			"ff/5",
+			"firefox/latest",
+			"chrome/10",
+			"chrome/latest",
+			"safari/5.1",
+			"safari/latest",
+			"opera/12"
+		]
+	},
+	"repository": {
+		"type": "git",
+		"url": "git://github.com/minimistjs/minimist.git"
+	},
+	"homepage": "https://github.com/minimistjs/minimist",
+	"keywords": [
+		"argv",
+		"getopt",
+		"parser",
+		"optimist"
+	],
+	"author": {
+		"name": "James Halliday",
+		"email": "mail@substack.net",
+		"url": "http://substack.net"
+	},
+	"funding": {
+		"url": "https://github.com/sponsors/ljharb"
+	},
+	"license": "MIT",
+	"auto-changelog": {
+		"output": "CHANGELOG.md",
+		"template": "keepachangelog",
+		"unreleased": false,
+		"commitLimit": false,
+		"backfillLimit": false,
+		"hideCredit": true
+	},
+	"publishConfig": {
+		"ignore": [
+			".github/workflows"
+		]
+	}
+}
diff --git a/mqtt-backend/node_modules/minimist/test/all_bool.js b/mqtt-backend/node_modules/minimist/test/all_bool.js
new file mode 100644
index 0000000..befa0c9
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/all_bool.js
@@ -0,0 +1,34 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('flag boolean true (default all --args to boolean)', function (t) {
+	var argv = parse(['moo', '--honk', 'cow'], {
+		boolean: true,
+	});
+
+	t.deepEqual(argv, {
+		honk: true,
+		_: ['moo', 'cow'],
+	});
+
+	t.deepEqual(typeof argv.honk, 'boolean');
+	t.end();
+});
+
+test('flag boolean true only affects double hyphen arguments without equals signs', function (t) {
+	var argv = parse(['moo', '--honk', 'cow', '-p', '55', '--tacos=good'], {
+		boolean: true,
+	});
+
+	t.deepEqual(argv, {
+		honk: true,
+		tacos: 'good',
+		p: 55,
+		_: ['moo', 'cow'],
+	});
+
+	t.deepEqual(typeof argv.honk, 'boolean');
+	t.end();
+});
diff --git a/mqtt-backend/node_modules/minimist/test/bool.js b/mqtt-backend/node_modules/minimist/test/bool.js
new file mode 100644
index 0000000..e58d47e
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/bool.js
@@ -0,0 +1,177 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('flag boolean default false', function (t) {
+	var argv = parse(['moo'], {
+		boolean: ['t', 'verbose'],
+		default: { verbose: false, t: false },
+	});
+
+	t.deepEqual(argv, {
+		verbose: false,
+		t: false,
+		_: ['moo'],
+	});
+
+	t.deepEqual(typeof argv.verbose, 'boolean');
+	t.deepEqual(typeof argv.t, 'boolean');
+	t.end();
+
+});
+
+test('boolean groups', function (t) {
+	var argv = parse(['-x', '-z', 'one', 'two', 'three'], {
+		boolean: ['x', 'y', 'z'],
+	});
+
+	t.deepEqual(argv, {
+		x: true,
+		y: false,
+		z: true,
+		_: ['one', 'two', 'three'],
+	});
+
+	t.deepEqual(typeof argv.x, 'boolean');
+	t.deepEqual(typeof argv.y, 'boolean');
+	t.deepEqual(typeof argv.z, 'boolean');
+	t.end();
+});
+test('boolean and alias with chainable api', function (t) {
+	var aliased = ['-h', 'derp'];
+	var regular = ['--herp', 'derp'];
+	var aliasedArgv = parse(aliased, {
+		boolean: 'herp',
+		alias: { h: 'herp' },
+	});
+	var propertyArgv = parse(regular, {
+		boolean: 'herp',
+		alias: { h: 'herp' },
+	});
+	var expected = {
+		herp: true,
+		h: true,
+		_: ['derp'],
+	};
+
+	t.same(aliasedArgv, expected);
+	t.same(propertyArgv, expected);
+	t.end();
+});
+
+test('boolean and alias with options hash', function (t) {
+	var aliased = ['-h', 'derp'];
+	var regular = ['--herp', 'derp'];
+	var opts = {
+		alias: { h: 'herp' },
+		boolean: 'herp',
+	};
+	var aliasedArgv = parse(aliased, opts);
+	var propertyArgv = parse(regular, opts);
+	var expected = {
+		herp: true,
+		h: true,
+		_: ['derp'],
+	};
+	t.same(aliasedArgv, expected);
+	t.same(propertyArgv, expected);
+	t.end();
+});
+
+test('boolean and alias array with options hash', function (t) {
+	var aliased = ['-h', 'derp'];
+	var regular = ['--herp', 'derp'];
+	var alt = ['--harp', 'derp'];
+	var opts = {
+		alias: { h: ['herp', 'harp'] },
+		boolean: 'h',
+	};
+	var aliasedArgv = parse(aliased, opts);
+	var propertyArgv = parse(regular, opts);
+	var altPropertyArgv = parse(alt, opts);
+	var expected = {
+		harp: true,
+		herp: true,
+		h: true,
+		_: ['derp'],
+	};
+	t.same(aliasedArgv, expected);
+	t.same(propertyArgv, expected);
+	t.same(altPropertyArgv, expected);
+	t.end();
+});
+
+test('boolean and alias using explicit true', function (t) {
+	var aliased = ['-h', 'true'];
+	var regular = ['--herp', 'true'];
+	var opts = {
+		alias: { h: 'herp' },
+		boolean: 'h',
+	};
+	var aliasedArgv = parse(aliased, opts);
+	var propertyArgv = parse(regular, opts);
+	var expected = {
+		herp: true,
+		h: true,
+		_: [],
+	};
+
+	t.same(aliasedArgv, expected);
+	t.same(propertyArgv, expected);
+	t.end();
+});
+
+// regression, see https://github.com/substack/node-optimist/issues/71
+test('boolean and --x=true', function (t) {
+	var parsed = parse(['--boool', '--other=true'], {
+		boolean: 'boool',
+	});
+
+	t.same(parsed.boool, true);
+	t.same(parsed.other, 'true');
+
+	parsed = parse(['--boool', '--other=false'], {
+		boolean: 'boool',
+	});
+
+	t.same(parsed.boool, true);
+	t.same(parsed.other, 'false');
+	t.end();
+});
+
+test('boolean --boool=true', function (t) {
+	var parsed = parse(['--boool=true'], {
+		default: {
+			boool: false,
+		},
+		boolean: ['boool'],
+	});
+
+	t.same(parsed.boool, true);
+	t.end();
+});
+
+test('boolean --boool=false', function (t) {
+	var parsed = parse(['--boool=false'], {
+		default: {
+			boool: true,
+		},
+		boolean: ['boool'],
+	});
+
+	t.same(parsed.boool, false);
+	t.end();
+});
+
+test('boolean using something similar to true', function (t) {
+	var opts = { boolean: 'h' };
+	var result = parse(['-h', 'true.txt'], opts);
+	var expected = {
+		h: true,
+		_: ['true.txt'],
+	};
+
+	t.same(result, expected);
+	t.end();
+});
diff --git a/mqtt-backend/node_modules/minimist/test/dash.js b/mqtt-backend/node_modules/minimist/test/dash.js
new file mode 100644
index 0000000..7078817
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/dash.js
@@ -0,0 +1,43 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('-', function (t) {
+	t.plan(6);
+	t.deepEqual(parse(['-n', '-']), { n: '-', _: [] });
+	t.deepEqual(parse(['--nnn', '-']), { nnn: '-', _: [] });
+	t.deepEqual(parse(['-']), { _: ['-'] });
+	t.deepEqual(parse(['-f-']), { f: '-', _: [] });
+	t.deepEqual(
+		parse(['-b', '-'], { boolean: 'b' }),
+		{ b: true, _: ['-'] }
+	);
+	t.deepEqual(
+		parse(['-s', '-'], { string: 's' }),
+		{ s: '-', _: [] }
+	);
+});
+
+test('-a -- b', function (t) {
+	t.plan(2);
+	t.deepEqual(parse(['-a', '--', 'b']), { a: true, _: ['b'] });
+	t.deepEqual(parse(['--a', '--', 'b']), { a: true, _: ['b'] });
+});
+
+test('move arguments after the -- into their own `--` array', function (t) {
+	t.plan(1);
+	t.deepEqual(
+		parse(['--name', 'John', 'before', '--', 'after'], { '--': true }),
+		{ name: 'John', _: ['before'], '--': ['after'] }
+	);
+});
+
+test('--- option value', function (t) {
+	// A multi-dash value is largely an edge case, but check the behaviour is as expected,
+	// and in particular the same for short option and long option (as made consistent in Jan 2023).
+	t.plan(2);
+	t.deepEqual(parse(['-n', '---']), { n: '---', _: [] });
+	t.deepEqual(parse(['--nnn', '---']), { nnn: '---', _: [] });
+});
+
diff --git a/mqtt-backend/node_modules/minimist/test/default_bool.js b/mqtt-backend/node_modules/minimist/test/default_bool.js
new file mode 100644
index 0000000..4e9f625
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/default_bool.js
@@ -0,0 +1,37 @@
+'use strict';
+
+var test = require('tape');
+var parse = require('../');
+
+test('boolean default true', function (t) {
+	var argv = parse([], {
+		boolean: 'sometrue',
+		default: { sometrue: true },
+	});
+	t.equal(argv.sometrue, true);
+	t.end();
+});
+
+test('boolean default false', function (t) {
+	var argv = parse([], {
+		boolean: 'somefalse',
+		default: { somefalse: false },
+	});
+	t.equal(argv.somefalse, false);
+	t.end();
+});
+
+test('boolean default to null', function (t) {
+	var argv = parse([], {
+		boolean: 'maybe',
+		default: { maybe: null },
+	});
+	t.equal(argv.maybe, null);
+
+	var argvLong = parse(['--maybe'], {
+		boolean: 'maybe',
+		default: { maybe: null },
+	});
+	t.equal(argvLong.maybe, true);
+	t.end();
+});
diff --git a/mqtt-backend/node_modules/minimist/test/dotted.js b/mqtt-backend/node_modules/minimist/test/dotted.js
new file mode 100644
index 0000000..126ff03
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/dotted.js
@@ -0,0 +1,24 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('dotted alias', function (t) {
+	var argv = parse(['--a.b', '22'], { default: { 'a.b': 11 }, alias: { 'a.b': 'aa.bb' } });
+	t.equal(argv.a.b, 22);
+	t.equal(argv.aa.bb, 22);
+	t.end();
+});
+
+test('dotted default', function (t) {
+	var argv = parse('', { default: { 'a.b': 11 }, alias: { 'a.b': 'aa.bb' } });
+	t.equal(argv.a.b, 11);
+	t.equal(argv.aa.bb, 11);
+	t.end();
+});
+
+test('dotted default with no alias', function (t) {
+	var argv = parse('', { default: { 'a.b': 11 } });
+	t.equal(argv.a.b, 11);
+	t.end();
+});
diff --git a/mqtt-backend/node_modules/minimist/test/kv_short.js b/mqtt-backend/node_modules/minimist/test/kv_short.js
new file mode 100644
index 0000000..6d1b53a
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/kv_short.js
@@ -0,0 +1,32 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('short -k=v', function (t) {
+	t.plan(1);
+
+	var argv = parse(['-b=123']);
+	t.deepEqual(argv, { b: 123, _: [] });
+});
+
+test('multi short -k=v', function (t) {
+	t.plan(1);
+
+	var argv = parse(['-a=whatever', '-b=robots']);
+	t.deepEqual(argv, { a: 'whatever', b: 'robots', _: [] });
+});
+
+test('short with embedded equals -k=a=b', function (t) {
+	t.plan(1);
+
+	var argv = parse(['-k=a=b']);
+	t.deepEqual(argv, { k: 'a=b', _: [] });
+});
+
+test('short with later equals like -ab=c', function (t) {
+	t.plan(1);
+
+	var argv = parse(['-ab=c']);
+	t.deepEqual(argv, { a: true, b: 'c', _: [] });
+});
diff --git a/mqtt-backend/node_modules/minimist/test/long.js b/mqtt-backend/node_modules/minimist/test/long.js
new file mode 100644
index 0000000..9fef51f
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/long.js
@@ -0,0 +1,33 @@
+'use strict';
+
+var test = require('tape');
+var parse = require('../');
+
+test('long opts', function (t) {
+	t.deepEqual(
+		parse(['--bool']),
+		{ bool: true, _: [] },
+		'long boolean'
+	);
+	t.deepEqual(
+		parse(['--pow', 'xixxle']),
+		{ pow: 'xixxle', _: [] },
+		'long capture sp'
+	);
+	t.deepEqual(
+		parse(['--pow=xixxle']),
+		{ pow: 'xixxle', _: [] },
+		'long capture eq'
+	);
+	t.deepEqual(
+		parse(['--host', 'localhost', '--port', '555']),
+		{ host: 'localhost', port: 555, _: [] },
+		'long captures sp'
+	);
+	t.deepEqual(
+		parse(['--host=localhost', '--port=555']),
+		{ host: 'localhost', port: 555, _: [] },
+		'long captures eq'
+	);
+	t.end();
+});
diff --git a/mqtt-backend/node_modules/minimist/test/num.js b/mqtt-backend/node_modules/minimist/test/num.js
new file mode 100644
index 0000000..074393e
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/num.js
@@ -0,0 +1,38 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('nums', function (t) {
+	var argv = parse([
+		'-x', '1234',
+		'-y', '5.67',
+		'-z', '1e7',
+		'-w', '10f',
+		'--hex', '0xdeadbeef',
+		'789',
+	]);
+	t.deepEqual(argv, {
+		x: 1234,
+		y: 5.67,
+		z: 1e7,
+		w: '10f',
+		hex: 0xdeadbeef,
+		_: [789],
+	});
+	t.deepEqual(typeof argv.x, 'number');
+	t.deepEqual(typeof argv.y, 'number');
+	t.deepEqual(typeof argv.z, 'number');
+	t.deepEqual(typeof argv.w, 'string');
+	t.deepEqual(typeof argv.hex, 'number');
+	t.deepEqual(typeof argv._[0], 'number');
+	t.end();
+});
+
+test('already a number', function (t) {
+	var argv = parse(['-x', 1234, 789]);
+	t.deepEqual(argv, { x: 1234, _: [789] });
+	t.deepEqual(typeof argv.x, 'number');
+	t.deepEqual(typeof argv._[0], 'number');
+	t.end();
+});
diff --git a/mqtt-backend/node_modules/minimist/test/parse.js b/mqtt-backend/node_modules/minimist/test/parse.js
new file mode 100644
index 0000000..65d9d90
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/parse.js
@@ -0,0 +1,209 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('parse args', function (t) {
+	t.deepEqual(
+		parse(['--no-moo']),
+		{ moo: false, _: [] },
+		'no'
+	);
+	t.deepEqual(
+		parse(['-v', 'a', '-v', 'b', '-v', 'c']),
+		{ v: ['a', 'b', 'c'], _: [] },
+		'multi'
+	);
+	t.end();
+});
+
+test('comprehensive', function (t) {
+	t.deepEqual(
+		parse([
+			'--name=meowmers', 'bare', '-cats', 'woo',
+			'-h', 'awesome', '--multi=quux',
+			'--key', 'value',
+			'-b', '--bool', '--no-meep', '--multi=baz',
+			'--', '--not-a-flag', 'eek',
+		]),
+		{
+			c: true,
+			a: true,
+			t: true,
+			s: 'woo',
+			h: 'awesome',
+			b: true,
+			bool: true,
+			key: 'value',
+			multi: ['quux', 'baz'],
+			meep: false,
+			name: 'meowmers',
+			_: ['bare', '--not-a-flag', 'eek'],
+		}
+	);
+	t.end();
+});
+
+test('flag boolean', function (t) {
+	var argv = parse(['-t', 'moo'], { boolean: 't' });
+	t.deepEqual(argv, { t: true, _: ['moo'] });
+	t.deepEqual(typeof argv.t, 'boolean');
+	t.end();
+});
+
+test('flag boolean value', function (t) {
+	var argv = parse(['--verbose', 'false', 'moo', '-t', 'true'], {
+		boolean: ['t', 'verbose'],
+		default: { verbose: true },
+	});
+
+	t.deepEqual(argv, {
+		verbose: false,
+		t: true,
+		_: ['moo'],
+	});
+
+	t.deepEqual(typeof argv.verbose, 'boolean');
+	t.deepEqual(typeof argv.t, 'boolean');
+	t.end();
+});
+
+test('newlines in params', function (t) {
+	var args = parse(['-s', 'X\nX']);
+	t.deepEqual(args, { _: [], s: 'X\nX' });
+
+	// reproduce in bash:
+	// VALUE="new
+	// line"
+	// node program.js --s="$VALUE"
+	args = parse(['--s=X\nX']);
+	t.deepEqual(args, { _: [], s: 'X\nX' });
+	t.end();
+});
+
+test('strings', function (t) {
+	var s = parse(['-s', '0001234'], { string: 's' }).s;
+	t.equal(s, '0001234');
+	t.equal(typeof s, 'string');
+
+	var x = parse(['-x', '56'], { string: 'x' }).x;
+	t.equal(x, '56');
+	t.equal(typeof x, 'string');
+	t.end();
+});
+
+test('stringArgs', function (t) {
+	var s = parse(['  ', '  '], { string: '_' })._;
+	t.same(s.length, 2);
+	t.same(typeof s[0], 'string');
+	t.same(s[0], '  ');
+	t.same(typeof s[1], 'string');
+	t.same(s[1], '  ');
+	t.end();
+});
+
+test('empty strings', function (t) {
+	var s = parse(['-s'], { string: 's' }).s;
+	t.equal(s, '');
+	t.equal(typeof s, 'string');
+
+	var str = parse(['--str'], { string: 'str' }).str;
+	t.equal(str, '');
+	t.equal(typeof str, 'string');
+
+	var letters = parse(['-art'], {
+		string: ['a', 't'],
+	});
+
+	t.equal(letters.a, '');
+	t.equal(letters.r, true);
+	t.equal(letters.t, '');
+
+	t.end();
+});
+
+test('string and alias', function (t) {
+	var x = parse(['--str', '000123'], {
+		string: 's',
+		alias: { s: 'str' },
+	});
+
+	t.equal(x.str, '000123');
+	t.equal(typeof x.str, 'string');
+	t.equal(x.s, '000123');
+	t.equal(typeof x.s, 'string');
+
+	var y = parse(['-s', '000123'], {
+		string: 'str',
+		alias: { str: 's' },
+	});
+
+	t.equal(y.str, '000123');
+	t.equal(typeof y.str, 'string');
+	t.equal(y.s, '000123');
+	t.equal(typeof y.s, 'string');
+
+	var z = parse(['-s123'], {
+		alias: { str: ['s', 'S'] },
+		string: ['str'],
+	});
+
+	t.deepEqual(
+		z,
+		{ _: [], s: '123', S: '123', str: '123' },
+		'opt.string works with multiple aliases'
+	);
+	t.end();
+});
+
+test('slashBreak', function (t) {
+	t.same(
+		parse(['-I/foo/bar/baz']),
+		{ I: '/foo/bar/baz', _: [] }
+	);
+	t.same(
+		parse(['-xyz/foo/bar/baz']),
+		{ x: true, y: true, z: '/foo/bar/baz', _: [] }
+	);
+	t.end();
+});
+
+test('alias', function (t) {
+	var argv = parse(['-f', '11', '--zoom', '55'], {
+		alias: { z: 'zoom' },
+	});
+	t.equal(argv.zoom, 55);
+	t.equal(argv.z, argv.zoom);
+	t.equal(argv.f, 11);
+	t.end();
+});
+
+test('multiAlias', function (t) {
+	var argv = parse(['-f', '11', '--zoom', '55'], {
+		alias: { z: ['zm', 'zoom'] },
+	});
+	t.equal(argv.zoom, 55);
+	t.equal(argv.z, argv.zoom);
+	t.equal(argv.z, argv.zm);
+	t.equal(argv.f, 11);
+	t.end();
+});
+
+test('nested dotted objects', function (t) {
+	var argv = parse([
+		'--foo.bar', '3', '--foo.baz', '4',
+		'--foo.quux.quibble', '5', '--foo.quux.o_O',
+		'--beep.boop',
+	]);
+
+	t.same(argv.foo, {
+		bar: 3,
+		baz: 4,
+		quux: {
+			quibble: 5,
+			o_O: true,
+		},
+	});
+	t.same(argv.beep, { boop: true });
+	t.end();
+});
diff --git a/mqtt-backend/node_modules/minimist/test/parse_modified.js b/mqtt-backend/node_modules/minimist/test/parse_modified.js
new file mode 100644
index 0000000..32965d1
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/parse_modified.js
@@ -0,0 +1,11 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('parse with modifier functions', function (t) {
+	t.plan(1);
+
+	var argv = parse(['-b', '123'], { boolean: 'b' });
+	t.deepEqual(argv, { b: true, _: [123] });
+});
diff --git a/mqtt-backend/node_modules/minimist/test/proto.js b/mqtt-backend/node_modules/minimist/test/proto.js
new file mode 100644
index 0000000..6e629dd
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/proto.js
@@ -0,0 +1,64 @@
+'use strict';
+
+/* eslint no-proto: 0 */
+
+var parse = require('../');
+var test = require('tape');
+
+test('proto pollution', function (t) {
+	var argv = parse(['--__proto__.x', '123']);
+	t.equal({}.x, undefined);
+	t.equal(argv.__proto__.x, undefined);
+	t.equal(argv.x, undefined);
+	t.end();
+});
+
+test('proto pollution (array)', function (t) {
+	var argv = parse(['--x', '4', '--x', '5', '--x.__proto__.z', '789']);
+	t.equal({}.z, undefined);
+	t.deepEqual(argv.x, [4, 5]);
+	t.equal(argv.x.z, undefined);
+	t.equal(argv.x.__proto__.z, undefined);
+	t.end();
+});
+
+test('proto pollution (number)', function (t) {
+	var argv = parse(['--x', '5', '--x.__proto__.z', '100']);
+	t.equal({}.z, undefined);
+	t.equal((4).z, undefined);
+	t.equal(argv.x, 5);
+	t.equal(argv.x.z, undefined);
+	t.end();
+});
+
+test('proto pollution (string)', function (t) {
+	var argv = parse(['--x', 'abc', '--x.__proto__.z', 'def']);
+	t.equal({}.z, undefined);
+	t.equal('...'.z, undefined);
+	t.equal(argv.x, 'abc');
+	t.equal(argv.x.z, undefined);
+	t.end();
+});
+
+test('proto pollution (constructor)', function (t) {
+	var argv = parse(['--constructor.prototype.y', '123']);
+	t.equal({}.y, undefined);
+	t.equal(argv.y, undefined);
+	t.end();
+});
+
+test('proto pollution (constructor function)', function (t) {
+	var argv = parse(['--_.concat.constructor.prototype.y', '123']);
+	function fnToBeTested() {}
+	t.equal(fnToBeTested.y, undefined);
+	t.equal(argv.y, undefined);
+	t.end();
+});
+
+// powered by snyk - https://github.com/backstage/backstage/issues/10343
+test('proto pollution (constructor function) snyk', function (t) {
+	var argv = parse('--_.constructor.constructor.prototype.foo bar'.split(' '));
+	t.equal(function () {}.foo, undefined);
+	t.equal(argv.y, undefined);
+	t.end();
+});
diff --git a/mqtt-backend/node_modules/minimist/test/short.js b/mqtt-backend/node_modules/minimist/test/short.js
new file mode 100644
index 0000000..4a7b843
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/short.js
@@ -0,0 +1,69 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('numeric short args', function (t) {
+	t.plan(2);
+	t.deepEqual(parse(['-n123']), { n: 123, _: [] });
+	t.deepEqual(
+		parse(['-123', '456']),
+		{ 1: true, 2: true, 3: 456, _: [] }
+	);
+});
+
+test('short', function (t) {
+	t.deepEqual(
+		parse(['-b']),
+		{ b: true, _: [] },
+		'short boolean'
+	);
+	t.deepEqual(
+		parse(['foo', 'bar', 'baz']),
+		{ _: ['foo', 'bar', 'baz'] },
+		'bare'
+	);
+	t.deepEqual(
+		parse(['-cats']),
+		{ c: true, a: true, t: true, s: true, _: [] },
+		'group'
+	);
+	t.deepEqual(
+		parse(['-cats', 'meow']),
+		{ c: true, a: true, t: true, s: 'meow', _: [] },
+		'short group next'
+	);
+	t.deepEqual(
+		parse(['-h', 'localhost']),
+		{ h: 'localhost', _: [] },
+		'short capture'
+	);
+	t.deepEqual(
+		parse(['-h', 'localhost', '-p', '555']),
+		{ h: 'localhost', p: 555, _: [] },
+		'short captures'
+	);
+	t.end();
+});
+
+test('mixed short bool and capture', function (t) {
+	t.same(
+		parse(['-h', 'localhost', '-fp', '555', 'script.js']),
+		{
+			f: true, p: 555, h: 'localhost',
+			_: ['script.js'],
+		}
+	);
+	t.end();
+});
+
+test('short and long', function (t) {
+	t.deepEqual(
+		parse(['-h', 'localhost', '-fp', '555', 'script.js']),
+		{
+			f: true, p: 555, h: 'localhost',
+			_: ['script.js'],
+		}
+	);
+	t.end();
+});
diff --git a/mqtt-backend/node_modules/minimist/test/stop_early.js b/mqtt-backend/node_modules/minimist/test/stop_early.js
new file mode 100644
index 0000000..52a6a91
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/stop_early.js
@@ -0,0 +1,17 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('stops parsing on the first non-option when stopEarly is set', function (t) {
+	var argv = parse(['--aaa', 'bbb', 'ccc', '--ddd'], {
+		stopEarly: true,
+	});
+
+	t.deepEqual(argv, {
+		aaa: 'bbb',
+		_: ['ccc', '--ddd'],
+	});
+
+	t.end();
+});
diff --git a/mqtt-backend/node_modules/minimist/test/unknown.js b/mqtt-backend/node_modules/minimist/test/unknown.js
new file mode 100644
index 0000000..4f2e0ca
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/unknown.js
@@ -0,0 +1,104 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('boolean and alias is not unknown', function (t) {
+	var unknown = [];
+	function unknownFn(arg) {
+		unknown.push(arg);
+		return false;
+	}
+	var aliased = ['-h', 'true', '--derp', 'true'];
+	var regular = ['--herp', 'true', '-d', 'true'];
+	var opts = {
+		alias: { h: 'herp' },
+		boolean: 'h',
+		unknown: unknownFn,
+	};
+	parse(aliased, opts);
+	parse(regular, opts);
+
+	t.same(unknown, ['--derp', '-d']);
+	t.end();
+});
+
+test('flag boolean true any double hyphen argument is not unknown', function (t) {
+	var unknown = [];
+	function unknownFn(arg) {
+		unknown.push(arg);
+		return false;
+	}
+	var argv = parse(['--honk', '--tacos=good', 'cow', '-p', '55'], {
+		boolean: true,
+		unknown: unknownFn,
+	});
+	t.same(unknown, ['--tacos=good', 'cow', '-p']);
+	t.same(argv, {
+		honk: true,
+		_: [],
+	});
+	t.end();
+});
+
+test('string and alias is not unknown', function (t) {
+	var unknown = [];
+	function unknownFn(arg) {
+		unknown.push(arg);
+		return false;
+	}
+	var aliased = ['-h', 'hello', '--derp', 'goodbye'];
+	var regular = ['--herp', 'hello', '-d', 'moon'];
+	var opts = {
+		alias: { h: 'herp' },
+		string: 'h',
+		unknown: unknownFn,
+	};
+	parse(aliased, opts);
+	parse(regular, opts);
+
+	t.same(unknown, ['--derp', '-d']);
+	t.end();
+});
+
+test('default and alias is not unknown', function (t) {
+	var unknown = [];
+	function unknownFn(arg) {
+		unknown.push(arg);
+		return false;
+	}
+	var aliased = ['-h', 'hello'];
+	var regular = ['--herp', 'hello'];
+	var opts = {
+		default: { h: 'bar' },
+		alias: { h: 'herp' },
+		unknown: unknownFn,
+	};
+	parse(aliased, opts);
+	parse(regular, opts);
+
+	t.same(unknown, []);
+	t.end();
+	unknownFn(); // exercise fn for 100% coverage
+});
+
+test('value following -- is not unknown', function (t) {
+	var unknown = [];
+	function unknownFn(arg) {
+		unknown.push(arg);
+		return false;
+	}
+	var aliased = ['--bad', '--', 'good', 'arg'];
+	var opts = {
+		'--': true,
+		unknown: unknownFn,
+	};
+	var argv = parse(aliased, opts);
+
+	t.same(unknown, ['--bad']);
+	t.same(argv, {
+		'--': ['good', 'arg'],
+		_: [],
+	});
+	t.end();
+});
diff --git a/mqtt-backend/node_modules/minimist/test/whitespace.js b/mqtt-backend/node_modules/minimist/test/whitespace.js
new file mode 100644
index 0000000..4fdaf1d
--- /dev/null
+++ b/mqtt-backend/node_modules/minimist/test/whitespace.js
@@ -0,0 +1,10 @@
+'use strict';
+
+var parse = require('../');
+var test = require('tape');
+
+test('whitespace should be whitespace', function (t) {
+	t.plan(1);
+	var x = parse(['-x', '\t']).x;
+	t.equal(x, '\t');
+});
diff --git a/mqtt-backend/node_modules/mqemitter/.github/dependabot.yml b/mqtt-backend/node_modules/mqemitter/.github/dependabot.yml
new file mode 100644
index 0000000..7e7cbe1
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/.github/dependabot.yml
@@ -0,0 +1,11 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: standard
+    versions:
+    - 16.0.3
diff --git a/mqtt-backend/node_modules/mqemitter/.github/workflows/ci.yml b/mqtt-backend/node_modules/mqemitter/.github/workflows/ci.yml
new file mode 100644
index 0000000..c673713
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/.github/workflows/ci.yml
@@ -0,0 +1,27 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [16.x, 18.x, 20.x, 22.x]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Run tests
+        run: |
+          npm run test
diff --git a/mqtt-backend/node_modules/mqemitter/.nycrc b/mqtt-backend/node_modules/mqemitter/.nycrc
new file mode 100644
index 0000000..1a0bab9
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/.nycrc
@@ -0,0 +1,11 @@
+{
+  "branches": 100,
+  "lines": 100,
+  "functions": 100,
+  "statements": 100,
+  "check-coverage": true,
+  "exclude": [
+    "abstractTest.js",
+    "test/*.js"
+  ]
+}
diff --git a/mqtt-backend/node_modules/mqemitter/CODE_OF_CONDUCT.md b/mqtt-backend/node_modules/mqemitter/CODE_OF_CONDUCT.md
new file mode 100644
index 0000000..0d5ca1b
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/CODE_OF_CONDUCT.md
@@ -0,0 +1,84 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our community a harassment-free experience for everyone, regardless of age, body size, visible or invisible disability, ethnicity, sex characteristics, gender identity and expression, level of experience, education, socio-economic status, nationality, personal appearance, race, religion, or sexual identity and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming, diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes, and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of acceptable behavior and will take appropriate and fair corrective action in response to any behavior that they deem inappropriate, threatening, offensive, or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, and will communicate reasons for moderation decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when an individual is officially representing the community in public spaces. Examples of representing our community include using an official e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported to the community leaders responsible for enforcement at hello@matteocollina.com. All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing clarity around the nature of the violation and an explanation of why the behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No interaction with the people involved, including unsolicited interaction with those enforcing the Code of Conduct, for a specified period of time. This includes avoiding interactions in community spaces as well as external channels like social media. Violating these terms may lead to a temporary or permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public communication with the community for a specified period of time. No public or private interaction with the people involved, including unsolicited interaction with those enforcing the Code of Conduct, is allowed during this period. Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community standards, including sustained inappropriate behavior,  harassment of an individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 2.0,
+available at https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at https://www.contributor-covenant.org/translations.
diff --git a/mqtt-backend/node_modules/mqemitter/LICENSE b/mqtt-backend/node_modules/mqemitter/LICENSE
new file mode 100644
index 0000000..5d7e3ae
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/LICENSE
@@ -0,0 +1,15 @@
+ISC License
+
+Copyright (c) 2014-2020, Matteo Collina <hello@matteocollina.com>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/mqemitter/README.md b/mqtt-backend/node_modules/mqemitter/README.md
new file mode 100644
index 0000000..2ddbcf9
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/README.md
@@ -0,0 +1,190 @@
+<!-- markdownlint-disable MD013 MD024 -->
+
+# MQEmitter
+
+![ci](https://github.com/mcollina/mqemitter/workflows/ci/badge.svg)
+[![Known Vulnerabilities](https://snyk.io/test/github/mcollina/mqemitter/badge.svg)](https://snyk.io/test/github/mcollina/mqemitter)
+[![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat)](http://standardjs.com/)\
+[![Dependencies Status](https://david-dm.org/mcollina/mqemitter/status.svg)](https://david-dm.org/mcollina/mqemitter)
+[![devDependencies Status](https://david-dm.org/mcollina/mqemitter/dev-status.svg)](https://david-dm.org/mcollina/mqemitter?type=dev)\
+[![NPM version](https://img.shields.io/npm/v/mqemitter.svg?style=flat)](https://www.npmjs.com/mqemitter)
+[![NPM downloads](https://img.shields.io/npm/dm/mqemitter.svg?style=flat)](https://www.npmjs.com/mqemitter)
+
+An Opinionated Message Queue with an emitter-style API, but with callbacks.
+
+If you need a multi process MQEmitter, check out the table below:
+
+- [mqemitter-redis]: Redis-powered mqemitter
+- [mqemitter-mongodb]: Mongodb based mqemitter
+- [mqemitter-child-process]: Share the same mqemitter between a hierarchy of child processes
+- [mqemitter-cs]: Expose a MQEmitter via a simple client/server protocol
+- [mqemitter-p2p]: A P2P implementation of MQEmitter, based on HyperEmitter and a Merkle DAG
+- [mqemitter-aerospike]: Aerospike mqemitter
+
+## Installation
+
+```sh
+npm install mqemitter
+```
+
+## Examples
+
+```js
+const mq = require('mqemitter')
+const emitter = mq({ concurrency: 5 })
+const message
+
+emitter.on('hello world', function (message, cb) {
+  // call callback when you are done
+  // do not pass any errors, the emitter cannot handle it.
+  cb()
+})
+
+// topic is mandatory
+message = { topic: 'hello world', payload: 'or any other fields' }
+emitter.emit(message, function () {
+  // emitter will never return an error
+})
+```
+
+## API
+
+- [new MQEmitter ([options])](#new-mqemitter-options)
+- [emitter.emit (message, callback)](#emitteremit-message-callback)
+- [emitter.on (topic, listener, [callback])](#emitteron-topic-listener-callback)
+- [emitter.removeListener (topic, listener, [callback])](#emitterremovelistener-topic-listener-callback)
+- [emitter.close (callback)](#emitterclose-callback)
+
+## new MQEmitter ([options])
+
+- options `<object>`
+  - `concurrency` `<number>` maximum number of concurrent messages that can be on concurrent delivery. __Default__: `0`
+  - `wildcardOne` `<string>` a char to use for matching exactly one _non-empty_ level word. __Default__: `+`
+  - `wildcardSome` `<string>` a char to use for matching multiple level wildcards. __Default__: #`
+  - `matchEmptyLevels` `<boolean>` If true then `wildcardOne` also matches an empty word. __Default__: `true`
+  - `separator` `<string>`  a separator character to use for separating words. __Default__: `/`
+
+Create a new MQEmitter class.
+
+MQEmitter is the class and function exposed by this module.
+It can be created by `MQEmitter()` or using `new MQEmitter()`.
+
+For more information on wildcards, see [this explanation](#wildcards) or [Qlobber](https://www.npmjs.com/qlobber).
+
+## emitter.emit (message, callback)
+
+- `message` `<object>`
+- `callback` `<Function>` `(error) => void`
+  - error `<Error>` | `null`
+
+Emit the given message, which must have a `topic` property, which can contain wildcards as defined on creation.
+
+## emitter.on (topic, listener, [callback])
+
+- `topic` `<string>`
+- `listener` `<Function>` `(message, done) => void`
+- `callback` `<Function>` `() => void`
+
+Add the given listener to the passed topic. Topic can contain wildcards, as defined on creation.
+
+The `listener` __must never error__ and `done` must not be called with an __`err`__ object.
+
+`callback` will be called when the event subscribe is done correctly.
+
+## emitter.removeListener (topic, listener, [callback])
+
+The inverse of `on`.
+
+## emitter.close (callback)
+
+- `callback` `<Function>` `() => void`
+
+Close the given emitter. After, all writes will return an error.
+
+## Wildcards
+
+__MQEmitter__ supports the use of wildcards: every topic is splitted according to `separator`.
+
+The wildcard character `+` matches exactly _non-empty_ one word:
+
+```js
+const mq = require('mqemitter')
+const emitter = mq()
+
+emitter.on('hello/+/world', function(message, cb) {
+  // will ONLY capture { topic: 'hello/my/world', 'something': 'more' }
+  console.log(message)
+  cb()
+})
+emitter.on('hello/+', function(message, cb) {
+  // will not be called
+  console.log(message)
+  cb()
+})
+
+emitter.emit({ topic: 'hello/my/world', something: 'more' })
+emitter.emit({ topic: 'hello//world', something: 'more' })
+```
+
+The wildcard character `+` matches one word:
+
+```js
+const mq = require('mqemitter')
+const emitter = mq({ matchEmptyLevels: true })
+
+emitter.on('hello/+/world', function(message, cb) {
+  // will capture { topic: 'hello/my/world', 'something': 'more' }
+  // and capture { topic: 'hello//world', 'something': 'more' }
+  console.log(message)
+  cb()
+})
+
+emitter.on('hello/+', function(message, cb) {
+  // will not be called
+  console.log(message)
+  cb()
+})
+
+emitter.emit({ topic: 'hello/my/world', something: 'more' })
+emitter.emit({ topic: 'hello//world', something: 'more' })
+```
+
+The wildcard character `#` matches zero or more words:
+
+```js
+const mq = require('mqemitter')
+const emitter = mq()
+
+emitter.on('hello/#', function(message, cb) {
+  // this will print { topic: 'hello/my/world', 'something': 'more' }
+  console.log(message)
+  cb()
+})
+
+emitter.on('#', function(message, cb) {
+  // this will print { topic: 'hello/my/world', 'something': 'more' }
+  console.log(message)
+  cb()
+})
+
+emitter.on('hello/my/world/#', function(message, cb) {
+  // this will print { topic: 'hello/my/world', 'something': 'more' }
+  console.log(message)
+  cb()
+})
+
+emitter.emit({ topic: 'hello/my/world', something: 'more' })
+```
+
+Of course, you can mix `#` and `+` in the same subscription.
+
+## LICENSE
+
+MIT
+
+[mqemitter-redis]: https://www.npmjs.com/mqemitter-redis
+[mqemitter-mongodb]: https://www.npmjs.com/mqemitter-mongodb
+[mqemitter-child-process]: https://www.npmjs.com/mqemitter-child-process
+[mqemitter-cs]: https://www.npmjs.com/mqemitter-cs
+[mqemitter-p2p]: https://www.npmjs.com/mqemitter-p2p
+[mqemitter-aerospike]: https://www.npmjs.com/mqemitter-aerospike
diff --git a/mqtt-backend/node_modules/mqemitter/abstractTest.js b/mqtt-backend/node_modules/mqemitter/abstractTest.js
new file mode 100644
index 0000000..5e4a357
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/abstractTest.js
@@ -0,0 +1,543 @@
+'use strict'
+
+module.exports = function abstractTests (opts) {
+  const builder = opts.builder
+  const test = opts.test
+
+  test('support on and emit', function (t) {
+    t.plan(4)
+
+    const e = builder()
+    const expected = {
+      topic: 'hello world',
+      payload: { my: 'message' }
+    }
+
+    e.on('hello world', function (message, cb) {
+      t.equal(e.current, 1, 'number of current messages')
+      t.deepEqual(message, expected)
+      t.equal(this, e)
+      cb()
+    }, function () {
+      e.emit(expected, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('support multiple subscribers', function (t) {
+    t.plan(3)
+
+    const e = builder()
+    const expected = {
+      topic: 'hello world',
+      payload: { my: 'message' }
+    }
+
+    e.on('hello world', function (message, cb) {
+      t.ok(message, 'message received')
+      cb()
+    }, function () {
+      e.on('hello world', function (message, cb) {
+        t.ok(message, 'message received')
+        cb()
+      }, function () {
+        e.emit(expected, function () {
+          e.close(function () {
+            t.pass('closed')
+          })
+        })
+      })
+    })
+  })
+
+  test('support multiple subscribers and unsubscribers', function (t) {
+    t.plan(2)
+
+    const e = builder()
+    const expected = {
+      topic: 'hello world',
+      payload: { my: 'message' }
+    }
+
+    function first (message, cb) {
+      t.fail('first listener should not receive any events')
+      cb()
+    }
+
+    function second (message, cb) {
+      t.ok(message, 'second listener must receive the message')
+      cb()
+      e.close(function () {
+        t.pass('closed')
+      })
+    }
+
+    e.on('hello world', first, function () {
+      e.on('hello world', second, function () {
+        e.removeListener('hello world', first, function () {
+          e.emit(expected)
+        })
+      })
+    })
+  })
+
+  test('removeListener', function (t) {
+    t.plan(1)
+
+    const e = builder()
+    const expected = {
+      topic: 'hello world',
+      payload: { my: 'message' }
+    }
+    let toRemoveCalled = false
+
+    function toRemove (message, cb) {
+      toRemoveCalled = true
+      cb()
+    }
+
+    e.on('hello world', function (message, cb) {
+      cb()
+    }, function () {
+      e.on('hello world', toRemove, function () {
+        e.removeListener('hello world', toRemove, function () {
+          e.emit(expected, function () {
+            e.close(function () {
+              t.notOk(toRemoveCalled, 'the toRemove function must not be called')
+            })
+          })
+        })
+      })
+    })
+  })
+
+  test('without a callback on emit and on', function (t) {
+    t.plan(1)
+
+    const e = builder()
+    const expected = {
+      topic: 'hello world',
+      payload: { my: 'message' }
+    }
+
+    e.on('hello world', function (message, cb) {
+      cb()
+      e.close(function () {
+        t.pass('closed')
+      })
+    })
+
+    setTimeout(function () {
+      e.emit(expected)
+    }, 100)
+  })
+
+  test('without any listeners', function (t) {
+    t.plan(2)
+
+    const e = builder()
+    const expected = {
+      topic: 'hello world',
+      payload: { my: 'message' }
+    }
+
+    e.emit(expected)
+    t.equal(e.current, 0, 'reset the current messages trackers')
+    e.close(function () {
+      t.pass('closed')
+    })
+  })
+
+  test('support one level wildcard', function (t) {
+    t.plan(2)
+
+    const e = builder()
+    const expected = {
+      topic: 'hello/world',
+      payload: { my: 'message' }
+    }
+
+    e.on('hello/+', function (message, cb) {
+      t.equal(message.topic, 'hello/world')
+      cb()
+    }, function () {
+      // this will not be catched
+      e.emit({ topic: 'hello/my/world' })
+
+      // this will be catched
+      e.emit(expected, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('support one level wildcard - not match empty words', function (t) {
+    t.plan(2)
+
+    const e = builder({ matchEmptyLevels: false })
+    const expected = {
+      topic: 'hello/dummy/world',
+      payload: { my: 'message' }
+    }
+
+    e.on('hello/+/world', function (message, cb) {
+      t.equal(message.topic, 'hello/dummy/world')
+      cb()
+    }, function () {
+      // this will not be catched
+      e.emit({ topic: 'hello//world' })
+
+      // this will be catched
+      e.emit(expected, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('support one level wildcard - match empty words', function (t) {
+    t.plan(3)
+
+    const e = builder({ matchEmptyLevels: true })
+
+    e.on('hello/+/world', function (message, cb) {
+      const topic = message.topic
+      if (topic === 'hello//world' || topic === 'hello/dummy/world') {
+        t.pass('received ' + topic)
+      }
+      cb()
+    }, function () {
+      // this will be catched
+      e.emit({ topic: 'hello//world' })
+      // this will be catched
+      e.emit({ topic: 'hello/dummy/world' }, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('support one level wildcard - match empty words', function (t) {
+    t.plan(2)
+
+    const e = builder({ matchEmptyLevels: true })
+
+    e.on('hello/+', function (message, cb) {
+      t.equal(message.topic, 'hello/')
+      cb()
+    }, function () {
+      // this will be catched
+      e.emit({ topic: 'hello/' }, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('support one level wildcard - not match empty words', function (t) {
+    t.plan(1)
+
+    const e = builder({ matchEmptyLevels: false })
+
+    e.on('hello/+', function (message, cb) {
+      t.fail('should not catch')
+      cb()
+    }, function () {
+      // this will not be catched
+      e.emit({ topic: 'hello/' }, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('support changing one level wildcard', function (t) {
+    t.plan(2)
+
+    const e = builder({ wildcardOne: '~' })
+    const expected = {
+      topic: 'hello/world',
+      payload: { my: 'message' }
+    }
+
+    e.on('hello/~', function (message, cb) {
+      t.equal(message.topic, 'hello/world')
+      cb()
+    }, function () {
+      e.emit(expected, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('support deep wildcard', function (t) {
+    t.plan(2)
+
+    const e = builder()
+    const expected = {
+      topic: 'hello/my/world',
+      payload: { my: 'message' }
+    }
+
+    e.on('hello/#', function (message, cb) {
+      t.equal(message.topic, 'hello/my/world')
+      cb()
+    }, function () {
+      e.emit(expected, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('support deep wildcard without separator', function (t) {
+    t.plan(2)
+
+    const e = builder()
+    const expected = {
+      topic: 'hello',
+      payload: { my: 'message' }
+    }
+
+    e.on('#', function (message, cb) {
+      t.equal(message.topic, expected.topic)
+      cb()
+    }, function () {
+      e.emit(expected, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('support deep wildcard - match empty words', function (t) {
+    t.plan(2)
+
+    const e = builder({ matchEmptyLevels: true })
+    const expected = {
+      topic: 'hello',
+      payload: { my: 'message' }
+    }
+
+    const wrong = {
+      topic: 'hellooo',
+      payload: { my: 'message' }
+    }
+
+    e.on('hello/#', function (message, cb) {
+      t.equal(message.topic, expected.topic)
+      cb()
+    }, function () {
+      e.emit(wrong) // this should not be received
+      e.emit(expected, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('support changing deep wildcard', function (t) {
+    t.plan(2)
+
+    const e = builder({ wildcardSome: '*' })
+    const expected = {
+      topic: 'hello/my/world',
+      payload: { my: 'message' }
+    }
+
+    e.on('hello/*', function (message, cb) {
+      t.equal(message.topic, 'hello/my/world')
+      cb()
+    }, function () {
+      e.emit(expected, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('support changing the level separator', function (t) {
+    t.plan(2)
+
+    const e = builder({ separator: '~' })
+    const expected = {
+      topic: 'hello~world',
+      payload: { my: 'message' }
+    }
+
+    e.on('hello~+', function (message, cb) {
+      t.equal(message.topic, 'hello~world')
+      cb()
+    }, function () {
+      e.emit(expected, function () {
+        e.close(function () {
+          t.pass('closed')
+        })
+      })
+    })
+  })
+
+  test('close support', function (t) {
+    const e = builder()
+    let check = false
+
+    t.notOk(e.closed, 'must have a false closed property')
+
+    e.close(function () {
+      t.ok(check, 'must delay the close callback')
+      t.ok(e.closed, 'must have a true closed property')
+      t.end()
+    })
+
+    check = true
+  })
+
+  test('emit after close errors', function (t) {
+    const e = builder()
+
+    e.close(function () {
+      e.emit({ topic: 'hello' }, function (err) {
+        t.ok(err, 'must return an error')
+        t.end()
+      })
+    })
+  })
+
+  test('support multiple subscribers with wildcards', function (t) {
+    const e = builder()
+    const expected = {
+      topic: 'hello/world',
+      payload: { my: 'message' }
+    }
+    let firstCalled = false
+    let secondCalled = false
+
+    e.on('hello/#', function (message, cb) {
+      t.notOk(firstCalled, 'first subscriber must only be called once')
+      firstCalled = true
+      cb()
+    })
+
+    e.on('hello/+', function (message, cb) {
+      t.notOk(secondCalled, 'second subscriber must only be called once')
+      secondCalled = true
+      cb()
+    }, function () {
+      e.emit(expected, function () {
+        e.close(function () {
+          t.end()
+        })
+      })
+    })
+  })
+
+  test('support multiple subscribers with wildcards (deep)', function (t) {
+    const e = builder()
+    const expected = {
+      topic: 'hello/my/world',
+      payload: { my: 'message' }
+    }
+    let firstCalled = false
+    let secondCalled = false
+
+    e.on('hello/#', function (message, cb) {
+      t.notOk(firstCalled, 'first subscriber must only be called once')
+      firstCalled = true
+      cb()
+    })
+
+    e.on('hello/+/world', function (message, cb) {
+      t.notOk(secondCalled, 'second subscriber must only be called once')
+      secondCalled = true
+      cb()
+    }, function () {
+      e.emit(expected, function () {
+        e.close(function () {
+          t.end()
+        })
+      })
+    })
+  })
+
+  test('emit & receive buffers', function (t) {
+    const e = builder()
+    const msg = Buffer.from('hello')
+    const expected = {
+      topic: 'hello',
+      payload: msg
+    }
+
+    e.on('hello', function (message, cb) {
+      t.deepEqual(msg, message.payload)
+      cb()
+    }, function () {
+      e.emit(expected, function () {
+        e.close(function () {
+          t.end()
+        })
+      })
+    })
+  })
+
+  test('packets are emitted in order', function (t) {
+    const e = builder()
+    const total = 10000
+    const topic = 'test'
+
+    let received = 0
+
+    e.on(topic, function (msg, cb) {
+      let fail = false
+      if (received !== msg.payload) {
+        t.fail(`leak detected. Count: ${received} - Payload: ${msg.payload}`)
+        fail = true
+      }
+
+      received++
+
+      if (fail || received === total) {
+        e.close(function () {
+          t.end()
+        })
+      }
+      cb()
+    }, function () {
+      for (let payload = 0; payload < total; payload++) {
+        e.emit({ topic, payload })
+      }
+    })
+  })
+
+  test('calling emit without cb when closed doesn\'t throw error', function (t) {
+    const e = builder()
+    const msg = Buffer.from('hello')
+    const expected = {
+      topic: 'hello',
+      payload: msg
+    }
+
+    e.close(function () {
+      try {
+        e.emit(expected)
+      } catch (error) {
+        t.error('throws error')
+      }
+      t.end()
+    })
+  })
+}
diff --git a/mqtt-backend/node_modules/mqemitter/bench.js b/mqtt-backend/node_modules/mqemitter/bench.js
new file mode 100644
index 0000000..cfb9a34
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/bench.js
@@ -0,0 +1,40 @@
+'use strict'
+
+const mqemitter = require('./')
+const emitter = mqemitter({ concurrency: 10 })
+const total = 1000000
+let written = 0
+let received = 0
+const timerKey = 'time for sending ' + total + ' messages'
+
+function write () {
+  if (written === total) {
+    return
+  }
+
+  written++
+
+  emitter.emit({ topic: 'hello', payload: 'world' }, write)
+}
+
+emitter.on('hello', function (msg, cb) {
+  received++
+  if (received === total) {
+    console.timeEnd(timerKey)
+  }
+  setImmediate(cb)
+})
+
+console.time(timerKey)
+write()
+write()
+write()
+write()
+write()
+write()
+write()
+write()
+write()
+write()
+write()
+write()
diff --git a/mqtt-backend/node_modules/mqemitter/example.js b/mqtt-backend/node_modules/mqemitter/example.js
new file mode 100644
index 0000000..833c569
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/example.js
@@ -0,0 +1,61 @@
+'use strict'
+
+const mqemitter = require('.')
+
+const mq = mqemitter()
+
+function subscribe (topic, obj) {
+  mq.on(topic, callback)
+  obj.close = close
+
+  function callback (value, cb) {
+    obj.push(value)
+    cb()
+  }
+
+  function close () {
+    mq.removeListener(topic, callback)
+  }
+}
+
+class MyQueue {
+  push (value) {
+    console.log(value)
+  }
+}
+
+const a = new MyQueue()
+const b = new MyQueue()
+const c = new MyQueue()
+
+subscribe('hello', a)
+subscribe('hello', b)
+subscribe('hello', c)
+
+mq.emit({ topic: 'hello', payload: 'world' })
+
+a.close()
+b.close()
+c.close()
+
+mq.emit({ topic: 'hello', payload: 'world' })
+
+// const listeners = new Map()
+//
+//
+// const queues = new Map()
+//
+// function subscribe (topic, queue) {
+//   if (listeners.has(topic)) {
+//
+//   }
+//
+//   function callback (err) {
+//
+//     for (var value of queues) {
+//     }
+//   }
+//
+//   listeners.set(topic, callback)
+//   queues.set(topic, [queue])
+// }
diff --git a/mqtt-backend/node_modules/mqemitter/mqemitter.js b/mqtt-backend/node_modules/mqemitter/mqemitter.js
new file mode 100644
index 0000000..7d556e8
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/mqemitter.js
@@ -0,0 +1,140 @@
+'use strict'
+
+const { Qlobber } = require('qlobber')
+const assert = require('assert')
+const fastparallel = require('fastparallel')
+
+function MQEmitter (opts) {
+  if (!(this instanceof MQEmitter)) {
+    return new MQEmitter(opts)
+  }
+
+  const that = this
+
+  opts = opts || {}
+  opts.matchEmptyLevels = opts.matchEmptyLevels === undefined ? true : !!opts.matchEmptyLevels
+  opts.separator = opts.separator || '/'
+  opts.wildcardOne = opts.wildcardOne || '+'
+  opts.wildcardSome = opts.wildcardSome || '#'
+
+  this._messageQueue = []
+  this._messageCallbacks = []
+  this._parallel = fastparallel({
+    results: false,
+    released
+  })
+
+  this.concurrency = opts.concurrency || 0
+
+  this.current = 0
+  this._doing = false
+  this._matcher = new Qlobber({
+    match_empty_levels: opts.matchEmptyLevels,
+    separator: opts.separator,
+    wildcard_one: opts.wildcardOne,
+    wildcard_some: opts.wildcardSome
+  })
+
+  this.closed = false
+  this._released = released
+
+  function released () {
+    that.current--
+
+    const message = that._messageQueue.shift()
+    const callback = that._messageCallbacks.shift()
+
+    if (message) {
+      that._do(message, callback)
+    } else {
+      that._doing = false
+    }
+  }
+}
+
+Object.defineProperty(MQEmitter.prototype, 'length', {
+  get: function () {
+    return this._messageQueue.length
+  },
+  enumerable: true
+})
+
+MQEmitter.prototype.on = function on (topic, notify, done) {
+  assert(topic)
+  assert(notify)
+  this._matcher.add(topic, notify)
+
+  if (done) {
+    setImmediate(done)
+  }
+
+  return this
+}
+
+MQEmitter.prototype.removeListener = function removeListener (topic, notify, done) {
+  assert(topic)
+  assert(notify)
+  const that = this
+  setImmediate(function () {
+    that._matcher.remove(topic, notify)
+    if (done) {
+      done()
+    }
+  })
+  return this
+}
+
+MQEmitter.prototype.removeAllListeners = function removeListener (topic, done) {
+  assert(topic)
+  this._matcher.remove(topic)
+
+  if (done) {
+    setImmediate(done)
+  }
+
+  return this
+}
+
+MQEmitter.prototype.emit = function emit (message, cb) {
+  assert(message)
+
+  cb = cb || noop
+
+  if (this.closed) {
+    return cb(new Error('mqemitter is closed'))
+  }
+
+  if (this.concurrency > 0 && this.current >= this.concurrency) {
+    this._messageQueue.push(message)
+    this._messageCallbacks.push(cb)
+    if (!this._doing) {
+      process.emitWarning('MqEmitter leak detected', { detail: 'For more info check: https://github.com/mcollina/mqemitter/pull/94' })
+      this._released()
+    }
+  } else {
+    this._do(message, cb)
+  }
+
+  return this
+}
+
+MQEmitter.prototype.close = function close (cb) {
+  this.closed = true
+  setImmediate(cb)
+
+  return this
+}
+
+MQEmitter.prototype._do = function (message, callback) {
+  this._doing = true
+  const matches = this._matcher.match(message.topic)
+
+  this.current++
+  this._parallel(this, matches, message, callback)
+
+  return this
+}
+
+function noop () { }
+
+module.exports = MQEmitter
diff --git a/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/.github/workflows/ci.yml b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/.github/workflows/ci.yml
new file mode 100644
index 0000000..21e354f
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/.github/workflows/ci.yml
@@ -0,0 +1,46 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [16, 18, 20]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Update APT
+        run: sudo apt update
+
+      - name: Install OS dependencies
+        run: sudo apt install libboost-dev libboost-context-dev
+
+      - name: Use Node ${{ matrix.node-version }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install packages
+        run: npm install
+
+      - name: Lint
+        run: npx grunt lint
+
+      - name: Test
+        if: matrix.node-version != '20'
+        run: npm test
+
+      - name: Coverage
+        if: matrix.node-version == '20'
+        run: npm run coverage
+
+      - name: Coveralls
+        if: matrix.node-version == '20'
+        uses: coverallsapp/github-action@v2
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/Gruntfile.js b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/Gruntfile.js
new file mode 100644
index 0000000..a5c0b00
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/Gruntfile.js
@@ -0,0 +1,70 @@
+/*jslint node: true */
+"use strict";
+
+const c8 = "npx c8 -x Gruntfile.js -x 'test/**'";
+
+module.exports = function (grunt)
+{
+    grunt.initConfig(
+    {
+        jshint: {
+            all: [ 'Gruntfile.js', 'index.js', 'lib/*.js', 'aedes/**/*.js', 'test/*.js', 'bench/**/*.js' ],
+            options: {
+                esversion: 11,
+                node: true
+            }
+        },
+
+        apidox: {
+            input: 'lib/qlobber.js',
+            output: 'README.md',
+            fullSourceDescription: true,
+            extraHeadingLevels: 1
+        },
+
+        exec: Object.fromEntries(Object.entries({
+            test: {
+                cmd: 'node --expose-gc ./node_modules/.bin/mocha test/*.js'
+            },
+
+            cover: {
+                cmd: `${c8} npx grunt test`
+            },
+
+            cover_report: {
+                cmd: `${c8} report -r lcov`
+            },
+
+            cover_check: {
+                cmd: `${c8} check-coverage --statements 100 --branches 100 --functions 100 --lines 100`
+            },
+
+            bench: {
+                cmd: 'npx bench -c 20000 -i bench/options/default.js,bench/options/dedup.js,bench/options/mapval.js,bench/options/default-native.js,bench/options/dedup-native.js,bench/options/default-cache-splits.js -k options bench/add bench/add_match_remove bench/match bench/match_search bench/test'
+            },
+
+            'bench-check': {
+                cmd: 'npx bench -c 20000 -i bench/options/check-default.js,bench/options/check-dedup.js,bench/options/check-mapval.js,bench/options/check-default-native.js,bench/options/check-dedup-native.js -k options bench/add bench/add_match_remove bench/match bench/match_search bench/test'
+            },
+
+            'bench-many': {
+                cmd: 'npx bench -c 1 -i bench/options/default.js,bench/options/dedup.js,bench/options/mapval.js,bench/options/default-native.js,bench/options/dedup-native.js,bench/options/default-cache-splits.js -k options bench/add_many bench/add_shortcut_many bench/match_many bench/match_search_many bench/test_many'
+            }
+        }).map(([k, v]) => [k, { stdio: 'inherit', ...v }]))
+    });
+    
+    grunt.loadNpmTasks('grunt-contrib-jshint');
+    grunt.loadNpmTasks('grunt-apidox');
+    grunt.loadNpmTasks('grunt-exec');
+
+    grunt.registerTask('lint', 'jshint');
+    grunt.registerTask('test', 'exec:test');
+    grunt.registerTask('docs', 'apidox');
+    grunt.registerTask('coverage', ['exec:cover',
+                                    'exec:cover_report',
+                                    'exec:cover_check']);
+    grunt.registerTask('bench', ['exec:bench',
+                                 'exec:bench-many']);
+    grunt.registerTask('bench-check', 'exec:bench-check');
+    grunt.registerTask('default', ['lint', 'test']);
+};
diff --git a/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/LICENCE b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/LICENCE
new file mode 100644
index 0000000..bfd8a74
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/LICENCE
@@ -0,0 +1,19 @@
+Copyright (c) 2016 David Halls <https://github.com/davedoesdev/>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/README.md b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/README.md
new file mode 100644
index 0000000..447da40
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/README.md
@@ -0,0 +1,517 @@
+# qlobber&nbsp;&nbsp;&nbsp;[![ci](https://github.com/davedoesdev/qlobber/actions/workflows/ci.yml/badge.svg)](https://github.com/davedoesdev/qlobber/actions/workflows/ci.yml) [![Coverage Status](https://coveralls.io/repos/davedoesdev/qlobber/badge.png?branch=master)](https://coveralls.io/r/davedoesdev/qlobber?branch=master) [![NPM version](https://badge.fury.io/js/qlobber.png)](http://badge.fury.io/js/qlobber)
+
+Node.js globbing for amqp-like topics.
+
+__Note:__ Version 5.0.0 adds async and worker thread support when used on Node 12+.
+
+Example:
+
+```javascript
+var assert = require('assert');
+var Qlobber = require('qlobber').Qlobber;
+var matcher = new Qlobber();
+matcher.add('foo.*', 'it matched!');
+assert.deepEqual(matcher.match('foo.bar'), ['it matched!']);
+assert(matcher.test('foo.bar', 'it matched!'));
+```
+
+The API is described [here](#tableofcontents).
+
+qlobber is implemented using a trie, as described in the RabbitMQ blog posts [here](http://www.rabbitmq.com/blog/2010/09/14/very-fast-and-scalable-topic-routing-part-1/) and [here](http://www.rabbitmq.com/blog/2011/03/28/very-fast-and-scalable-topic-routing-part-2/).
+
+## Installation
+
+```shell
+npm install qlobber
+```
+
+## Another Example
+
+A more advanced example using topics from the [RabbitMQ topic tutorial](http://www.rabbitmq.com/tutorials/tutorial-five-python.html):
+
+```javascript
+var assert = require('assert');
+var Qlobber = require('qlobber').Qlobber;
+var matcher = new Qlobber();
+matcher.add('*.orange.*', 'Q1');
+matcher.add('*.*.rabbit', 'Q2');
+matcher.add('lazy.#', 'Q2');
+assert.deepEqual(['quick.orange.rabbit',
+                  'lazy.orange.elephant',
+                  'quick.orange.fox',
+                  'lazy.brown.fox',
+                  'lazy.pink.rabbit',
+                  'quick.brown.fox',
+                  'orange',
+                  'quick.orange.male.rabbit',
+                  'lazy.orange.male.rabbit'].map(function (topic)
+                  {
+                      return matcher.match(topic).sort();
+                  }),
+                 [['Q1', 'Q2'],
+                  ['Q1', 'Q2'],
+                  ['Q1'],
+                  ['Q2'],
+                  ['Q2', 'Q2'],
+                  [],
+                  [],
+                  [],
+                  ['Q2']]);
+```
+
+## Async Example
+
+Same as the first example but using `await`:
+
+```javascript
+const assert = require('assert');
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+const matcher = new Qlobber.nativeString();
+
+(async () => {
+    await matcher.addP('foo.*', 'it matched!');
+    assert.deepEqual(await matcher.matchP('foo.bar'), ['it matched!']);
+    assert(await matcher.testP('foo.bar', 'it matched!'));
+})();
+```
+
+## Worker Thread Example
+
+Same again but the matching is done on a separate thread:
+
+```
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+const {
+    Worker, isMainThread, parentPort, workerData
+} = require('worker_threads');
+
+if (isMainThread) {
+    const matcher = new Qlobber.nativeString();
+    matcher.add('foo.*', 'it matched!');
+    const worker = new Worker(__filename, {
+        workerData: matcher.state_address
+    });
+    worker.on('message', msg => {
+        const assert = require('assert');
+        assert.deepEqual(msg, [['it matched!'], true]);
+    });
+} else {
+    const matcher = new Qlobber.nativeString(workerData);
+    parentPort.postMessage([
+        matcher.match('foo.bar'),
+        matcher.test('foo.bar', 'it matched!')
+    ]);
+}
+```
+
+## Licence
+
+[MIT](LICENCE)
+
+## Tests
+
+qlobber passes the [RabbitMQ topic tests](https://github.com/rabbitmq/rabbitmq-server/blob/master/src/rabbit_tests.erl) (I converted them from Erlang to Javascript).
+
+To run the tests:
+
+```shell
+npm test
+```
+
+## Lint
+
+```shell
+grunt lint
+```
+
+## Code Coverage
+
+```shell
+npm run coverage
+```
+
+[c8](https://github.com/bcoe/c8) results are available [here](http://rawgit.davedoesdev.com/davedoesdev/qlobber/master/coverage/lcov-report/index.html).
+
+Coveralls page is [here](https://coveralls.io/r/davedoesdev/qlobber).
+
+## Benchmarks
+
+```shell
+grunt bench
+```
+
+qlobber is also benchmarked in [ascoltatori](https://github.com/mcollina/ascoltatori).
+
+## Native Qlobbers
+
+The Javascript Qlobbers don't support asynchronous calls and worker threads
+because Javascript values can't be shared between threads.
+
+In order to support asynchronous calls and worker threads, a native C++
+implementation is available in the
+[qlobber-native](https://www.npmjs.com/package/qlobber-native) module.
+
+Add qlobber-native as a dependency to your project and then add it to qlobber
+like this:
+
+```javascript
+require('qlobber').set_native(require('qlobber-native'));
+```
+
+Note that [`set_native`](#set_nativeqlobber_native) returns qlobber's exports so you can do something like
+this:
+
+```javascript
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+```
+
+Note that qlobber-native requires Gnu C++ version 9+ and Boost 1.70+,
+including the `boost_context` runtime library.
+
+Once's you've added it to qlobber, the following classes will be available
+alongside the Javascript classes:
+
+- `Qlobber.nativeString`
+- `Qlobber.nativeNumber`
+- `QlobberDedup.nativeString`
+- `QlobberDedup.nativeNumber`
+- `QlobberTrue.native`
+
+They can only hold values of a single type (currently strings or numbers).
+
+### Asynchronous calls
+
+The native classes support the same API as the Javascript classes but have the
+following additional methods:
+
+- `addP`
+- `removeP`
+- `matchP`
+- `match_iterP`
+- `testP`
+- `clearP`
+- `visitP`
+- `get_restorerP`
+
+They correspond to their namesakes but return Promises. Note that `match_iterP`
+and `visitP` return async iterators.
+
+# API
+
+_Source: [lib/qlobber.js](lib/qlobber.js)_
+
+<a name="tableofcontents"></a>
+
+- <a name="toc_qlobberoptions"></a>[Qlobber](#qlobberoptions)
+- <a name="toc_qlobberprototypeaddtopic-val"></a><a name="toc_qlobberprototype"></a>[Qlobber.prototype.add](#qlobberprototypeaddtopic-val)
+- <a name="toc_qlobberprototyperemovetopic-val"></a>[Qlobber.prototype.remove](#qlobberprototyperemovetopic-val)
+- <a name="toc_qlobberprototypematchtopic"></a>[Qlobber.prototype.match](#qlobberprototypematchtopic)
+- <a name="toc_qlobberprototypematch_iter"></a>[Qlobber.prototype.match_iter](#qlobberprototypematch_iter)
+- <a name="toc_qlobberprototypetesttopic-val"></a>[Qlobber.prototype.test](#qlobberprototypetesttopic-val)
+- <a name="toc_qlobberprototypetest_valuesvals-val"></a>[Qlobber.prototype.test_values](#qlobberprototypetest_valuesvals-val)
+- <a name="toc_qlobberprototypeclear"></a>[Qlobber.prototype.clear](#qlobberprototypeclear)
+- <a name="toc_qlobberprototypevisit"></a>[Qlobber.prototype.visit](#qlobberprototypevisit)
+- <a name="toc_qlobberprototypeget_restoreroptions"></a>[Qlobber.prototype.get_restorer](#qlobberprototypeget_restoreroptions)
+- <a name="toc_qlobberdedupoptions"></a>[QlobberDedup](#qlobberdedupoptions)
+- <a name="toc_qlobberdedupprototypetest_valuesvals-val"></a><a name="toc_qlobberdedupprototype"></a>[QlobberDedup.prototype.test_values](#qlobberdedupprototypetest_valuesvals-val)
+- <a name="toc_qlobberdedupprototypematchtopic"></a>[QlobberDedup.prototype.match](#qlobberdedupprototypematchtopic)
+- <a name="toc_qlobbertrueoptions"></a>[QlobberTrue](#qlobbertrueoptions)
+- <a name="toc_qlobbertrueprototypetest_values"></a><a name="toc_qlobbertrueprototype"></a>[QlobberTrue.prototype.test_values](#qlobbertrueprototypetest_values)
+- <a name="toc_qlobbertrueprototypematchtopic"></a>[QlobberTrue.prototype.match](#qlobbertrueprototypematchtopic)
+- <a name="toc_visitorstreamqlobber"></a>[VisitorStream](#visitorstreamqlobber)
+- <a name="toc_restorerstreamqlobber"></a>[RestorerStream](#restorerstreamqlobber)
+- <a name="toc_set_nativeqlobber_native"></a>[set_native](#set_nativeqlobber_native)
+
+## Qlobber([options])
+
+> Creates a new qlobber.
+
+**Parameters:**
+
+- `{Object} [options]` Configures the qlobber. Use the following properties:
+  - `{String} separator` The character to use for separating words in topics. Defaults to '.'. MQTT uses '/' as the separator, for example.
+
+  - `{String} wildcard_one` The character to use for matching exactly one _non-empty_ word in a topic. Defaults to '*'. MQTT uses '+', for example.
+
+  - `{String} wildcard_some` The character to use for matching zero or more words in a topic. Defaults to '#'. MQTT uses '#' too.
+
+  - `{Boolean} match_empty_levels` If `true` then `wilcard_one` also matches an empty word in a topic. Defaults to `false`.
+
+  - `{Boolean|Map} cache_adds` Whether to cache topics when adding topic matchers. This will make adding multiple matchers for the same topic faster at the cost of extra memory usage. Defaults to `false`. If you supply a `Map` then it will be used to cache the topics (use this to enumerate all the topics in the qlobber).
+
+  - `{Integer} cache_splits` How many `topic.split` results to cache. When you pass in a topic, it has to be split on the `separator`. Caching the results will make using the same topics multiple times faster at the cost of extra memory usage. Defaults to `0` (no caching). The number of split results cached is limited by the value you pass here.
+
+  - `{Integer} max_words` Maximum number of words to allow in a topic. Defaults to 100.
+
+  - `{Integer} max_wildcard_somes` Maximum number of `wildcard_some` words in a topic. Defaults to 3.
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+<a name="qlobberprototype"></a>
+
+## Qlobber.prototype.add(topic, val)
+
+> Add a topic matcher to the qlobber.
+
+Note you can match more than one value against a topic by calling `add` multiple times with the same topic and different values.
+
+**Parameters:**
+
+- `{String} topic` The topic to match against.
+- `{Any} val` The value to return if the topic is matched.
+
+**Return:**
+
+`{Qlobber}` The qlobber (for chaining).
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.remove(topic, [val])
+
+> Remove a topic matcher from the qlobber.
+
+**Parameters:**
+
+- `{String} topic` The topic that's being matched against.
+- `{Any} [val]` The value that's being matched. If you don't specify `val` then all matchers for `topic` are removed.
+
+**Return:**
+
+`{Qlobber}` The qlobber (for chaining).
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.match(topic)
+
+> Match a topic.
+
+**Parameters:**
+
+- `{String} topic` The topic to match against.
+
+**Return:**
+
+`{Array}` List of values that matched the topic. This may contain duplicates. Use a [`QlobberDedup`](#qlobberdedupoptions) if you don't want duplicates.
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.match_iter()
+
+> Match a topic, returning the matches one at a time.
+
+**Return:**
+
+`{Iterator}` An iterator on the values that match the topic. There may be duplicate values, even if you use a [`QlobberDedup`](#qlobberdedupoptions).
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.test(topic, val)
+
+> Test whether a topic match contains a value. Faster than calling [`match`](#qlobberprototypematchtopic) and searching the result for the value. Values are tested using [`test_values`](#qlobberprototypetest_valuesvals-val).
+
+**Parameters:**
+
+- `{String} topic` The topic to match against.
+- `{Any} val` The value being tested for.
+
+**Return:**
+
+`{Boolean}` Whether matching against `topic` contains `val`.
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.test_values(vals, val)
+
+> Test whether values found in a match contain a value passed to [`test`](#qlobberprototypetesttopic-val). You can override this to provide a custom implementation. Defaults to using `indexOf`.
+
+**Parameters:**
+
+- `{Array} vals` The values found while matching.
+- `{Any} val` The value being tested for.
+
+**Return:**
+
+`{Boolean}` Whether `vals` contains `val`.
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.clear()
+
+> Reset the qlobber.
+
+Removes all topic matchers from the qlobber.
+
+**Return:**
+
+`{Qlobber}` The qlobber (for chaining).
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.visit()
+
+> Visit each node in the qlobber's trie in turn.
+
+**Return:**
+
+`{Iterator}` An iterator on the trie. The iterator returns objects which, if fed (in the same order) to the function returned by [`get_restorer`](#qlobberprototypeget_restoreroptions) on a different qlobber, will build that qlobber's trie to the same state. The objects can be serialized using `JSON.stringify`, _if_ the values you store in the qlobber are also serializable.
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.get_restorer([options])
+
+> Get a function which can restore the qlobber's trie to a state you retrieved
+by calling [`visit`](#qlobberprototypevisit) on this or another qlobber.
+
+**Parameters:**
+
+- `{Object} [options]` Options for restoring the trie.
+  - `{Boolean} cache_adds` Whether to cache topics when rebuilding the trie. This only applies if you also passed `cache_adds` as true in the [constructor](#qlobberoptions).
+
+**Return:**
+
+`{Function}` Function to call in order to rebuild the qlobber's trie. You should call this repeatedly with the objects you received from a call to [`visit`](#qlobberprototypevisit). If you serialized the objects, remember to deserialize them first (e.g. with `JSON.parse`)!
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## QlobberDedup([options])
+
+> Creates a new de-duplicating qlobber.
+
+Inherits from [`Qlobber`](#qlobberoptions).
+
+**Parameters:**
+
+- `{Object} [options]` Same options as [Qlobber](#qlobberoptions).
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+<a name="qlobberdedupprototype"></a>
+
+## QlobberDedup.prototype.test_values(vals, val)
+
+> Test whether values found in a match contain a value passed to [`test`](#qlobberprototypetesttopic_val). You can override this to provide a custom implementation. Defaults to using `has`.
+
+**Parameters:**
+
+- `{Set} vals` The values found while matching ([ES6 Set](http://www.ecma-international.org/ecma-262/6.0/#sec-set-objects)).
+- `{Any} val` The value being tested for.
+
+**Return:**
+
+`{Boolean}` Whether `vals` contains `val`.
+
+<sub>Go: [TOC](#tableofcontents) | [QlobberDedup.prototype](#toc_qlobberdedupprototype)</sub>
+
+## QlobberDedup.prototype.match(topic)
+
+> Match a topic.
+
+**Parameters:**
+
+- `{String} topic` The topic to match against.
+
+**Return:**
+
+`{Set}` [ES6 Set](http://www.ecma-international.org/ecma-262/6.0/#sec-set-objects) of values that matched the topic.
+
+<sub>Go: [TOC](#tableofcontents) | [QlobberDedup.prototype](#toc_qlobberdedupprototype)</sub>
+
+## QlobberTrue([options])
+
+> Creates a new qlobber which only stores the value `true`.
+
+Whatever value you [`add`](#qlobberprototypeaddtopic-val) to this qlobber
+(even `undefined`), a single, de-duplicated `true` will be stored. Use this
+qlobber if you only need to test whether topics match, not about the values
+they match to.
+
+Inherits from [`Qlobber`](#qlobberoptions).
+
+**Parameters:**
+
+- `{Object} [options]` Same options as [Qlobber](#qlobberoptions).
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+<a name="qlobbertrueprototype"></a>
+
+## QlobberTrue.prototype.test_values()
+
+> This override of [`test_values`](#qlobberprototypetest_valuesvals-val) always
+returns `true`. When you call [`test`](#qlobberprototypetesttopic-val) on a
+`QlobberTrue` instance, the value you pass is ignored since it only cares
+whether a topic is matched.
+
+**Return:**
+
+`{Boolean}` Always `true`.
+
+<sub>Go: [TOC](#tableofcontents) | [QlobberTrue.prototype](#toc_qlobbertrueprototype)</sub>
+
+## QlobberTrue.prototype.match(topic)
+
+> Match a topic.
+
+Since `QlobberTrue` only cares whether a topic is matched and not about values
+it matches to, this override of [`match`](#qlobberprototypematchtopic) just
+calls [`test`](#qlobberprototypetesttopic-val) (with value `undefined`).
+
+**Parameters:**
+
+- `{String} topic` The topic to match against.
+
+**Return:**
+
+`{Boolean}` Whether the `QlobberTrue` instance matches the topic.
+
+<sub>Go: [TOC](#tableofcontents) | [QlobberTrue.prototype](#toc_qlobbertrueprototype)</sub>
+
+## VisitorStream(qlobber)
+
+> Creates a new [`Readable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_readable) stream, in object mode, which calls [`visit`](#qlobberprototypevisit) on a qlobber to generate its data.
+
+You could [`pipe`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_readable_pipe_destination_options) this to a [`JSONStream.stringify`](https://github.com/dominictarr/JSONStream#jsonstreamstringifyopen-sep-close) stream, for instance, to serialize the qlobber to JSON. See [this test](test/json.js#L14) for an example.
+
+Inherits from [`Readable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_readable).
+
+**Parameters:**
+
+- `{Qlobber} qlobber` The qlobber to call [`visit`](#qlobberprototypevisit) on.
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+## RestorerStream(qlobber)
+
+> Creates a new [`Writable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_writable) stream, in object mode, which passes data written to it into the function returned by calling [`get_restorer`](#qlobberprototypeget_restoreroptions) on a qlobber.
+
+You could [`pipe`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_readable_pipe_destination_options) a [`JSONStream.parse`](https://github.com/dominictarr/JSONStream#jsonstreamparsepath) stream to this, for instance, to deserialize the qlobber from JSON. See [this test](test/json.js#L33) for an example.
+
+Inherits from [`Writable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_writable).
+
+**Parameters:**
+
+- `{Qlobber} qlobber` The qlobber to call [`get_restorer`](#qlobberprototypeget_restoreroptions) on.
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+## set_native(qlobber_native)
+
+> Add [qlobber-native](https://www.npmjs.com/package/qlobber-native) to qlobber.
+
+**Parameters:**
+
+- `{Object} qlobber_native` The qlobber-native module, obtained using `require('qlobber-native')`.
+
+**Return:**
+
+`{Object}` The qlobber exports with the following native classes added:
+
+  - `Qlobber.nativeString`
+  - `Qlobber.nativeNumber`
+  - `QlobberDedup.nativeString`
+  - `QlobberDedup.nativeNumber`
+  - `QlobberTrue.native`
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+_&mdash;generated by [apidox](https://github.com/codeactual/apidox)&mdash;_
diff --git a/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/aedes/qlobber-sub.js b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/aedes/qlobber-sub.js
new file mode 100644
index 0000000..05e8177
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/aedes/qlobber-sub.js
@@ -0,0 +1,122 @@
+/*jslint node: true */
+"use strict";
+
+var util = require('util'),
+    qlobber = require('..'),
+    Qlobber = qlobber.Qlobber;
+
+function QlobberSub (options)
+{
+    Qlobber.call(this, options);
+    this.subscriptionsCount = 0;
+}
+
+util.inherits(QlobberSub, Qlobber);
+
+QlobberSub.prototype._initial_value = function (val)
+{
+    this.subscriptionsCount += 1;
+
+    let r = {
+        topic: val.topic,
+        clientMap: new Map().set(val.clientId, { qos: val.qos, rh: val.rh, rap: val.rap, nl: val.nl }),
+    };
+
+    r[Symbol.iterator] = function* (topic)
+    {
+        if (topic === undefined)
+        {
+            for (let [clientId, sub] of r.clientMap)
+            {
+                yield { topic: r.topic, clientId, ...sub };
+            }
+        }
+        else if (r.topic === topic)
+        {
+            for (let [clientId, sub] of r.clientMap)
+            {
+                yield { clientId, ...sub };
+            }
+        }
+    };
+
+    return r;
+};
+
+QlobberSub.prototype._add_value = function (existing, val)
+{
+    var clientMap = existing.clientMap,
+        size = clientMap.size;
+
+    clientMap.set(val.clientId, { qos: val.qos, rh: val.rh, rap: val.rap, nl: val.nl });
+
+    if (clientMap.size > size)
+    {
+        this.subscriptionsCount += 1;
+    }
+};
+
+QlobberSub.prototype._add_values = function (dest, existing, topic)
+{
+    if (topic === undefined)
+    {
+        for (let [clientId, sub] of existing.clientMap)
+        {
+            dest.push({ clientId, topic: existing.topic, ...sub });
+        }
+    }
+    else if (existing.topic === topic)
+    {
+        for (let [clientId, sub] of existing.clientMap)
+        {
+            dest.push({ clientId,...sub });
+        }
+    }
+};
+
+QlobberSub.prototype._remove_value = function (existing, val)
+{
+    var clientMap = existing.clientMap,
+        size_before = clientMap.size;
+
+    clientMap.delete(val.clientId);
+
+    var size_after = clientMap.size;
+
+    if (size_after < size_before)
+    {
+        this.subscriptionsCount -= 1;
+    }
+
+    return size_after === 0;
+};
+
+// Returns whether client is last subscriber to topic
+QlobberSub.prototype.test_values = function (existing, val)
+{
+    var clientMap = existing.clientMap;
+
+    return (existing.topic === val.topic) &&
+           (clientMap.size === 1) &&
+           clientMap.has(val.clientId);
+};
+
+QlobberSub.prototype.match = function (topic, ctx)
+{
+    return this._match([], 0, topic.split(this._separator), this._trie, ctx);
+};
+
+QlobberSub.prototype.clear = function ()
+{
+    this.subscriptionsCount = 0;
+    return Qlobber.prototype.clear.call(this);
+};
+
+QlobberSub.set_native = function (qlobber_native)
+{
+    const wrap_native = require('../lib/wrap_native.js');
+    QlobberSub.native = wrap_native(qlobber_native.QlobberSub, QlobberSub);
+    return module.exports;
+};
+
+module.exports = QlobberSub;
diff --git a/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/index.js b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/index.js
new file mode 100644
index 0000000..ed5d9db
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/index.js
@@ -0,0 +1,3 @@
+/*jslint node: true*/
+"use strict";
+module.exports = require('./lib/qlobber');
diff --git a/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/lib/qlobber.js b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/lib/qlobber.js
new file mode 100644
index 0000000..be150c9
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/lib/qlobber.js
@@ -0,0 +1,1126 @@
+/**
+# qlobber&nbsp;&nbsp;&nbsp;[![ci](https://github.com/davedoesdev/qlobber/actions/workflows/ci.yml/badge.svg)](https://github.com/davedoesdev/qlobber/actions/workflows/ci.yml) [![Coverage Status](https://coveralls.io/repos/davedoesdev/qlobber/badge.png?branch=master)](https://coveralls.io/r/davedoesdev/qlobber?branch=master) [![NPM version](https://badge.fury.io/js/qlobber.png)](http://badge.fury.io/js/qlobber)
+
+Node.js globbing for amqp-like topics.
+
+__Note:__ Version 5.0.0 adds async and worker thread support when used on Node 12+.
+
+Example:
+
+```javascript
+var assert = require('assert');
+var Qlobber = require('qlobber').Qlobber;
+var matcher = new Qlobber();
+matcher.add('foo.*', 'it matched!');
+assert.deepEqual(matcher.match('foo.bar'), ['it matched!']);
+assert(matcher.test('foo.bar', 'it matched!'));
+```
+
+The API is described [here](#tableofcontents).
+
+qlobber is implemented using a trie, as described in the RabbitMQ blog posts [here](http://www.rabbitmq.com/blog/2010/09/14/very-fast-and-scalable-topic-routing-part-1/) and [here](http://www.rabbitmq.com/blog/2011/03/28/very-fast-and-scalable-topic-routing-part-2/).
+
+## Installation
+
+```shell
+npm install qlobber
+```
+
+## Another Example
+
+A more advanced example using topics from the [RabbitMQ topic tutorial](http://www.rabbitmq.com/tutorials/tutorial-five-python.html):
+
+```javascript
+var assert = require('assert');
+var Qlobber = require('qlobber').Qlobber;
+var matcher = new Qlobber();
+matcher.add('*.orange.*', 'Q1');
+matcher.add('*.*.rabbit', 'Q2');
+matcher.add('lazy.#', 'Q2');
+assert.deepEqual(['quick.orange.rabbit',
+                  'lazy.orange.elephant',
+                  'quick.orange.fox',
+                  'lazy.brown.fox',
+                  'lazy.pink.rabbit',
+                  'quick.brown.fox',
+                  'orange',
+                  'quick.orange.male.rabbit',
+                  'lazy.orange.male.rabbit'].map(function (topic)
+                  {
+                      return matcher.match(topic).sort();
+                  }),
+                 [['Q1', 'Q2'],
+                  ['Q1', 'Q2'],
+                  ['Q1'],
+                  ['Q2'],
+                  ['Q2', 'Q2'],
+                  [],
+                  [],
+                  [],
+                  ['Q2']]);
+```
+
+## Async Example
+
+Same as the first example but using `await`:
+
+```javascript
+const assert = require('assert');
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+const matcher = new Qlobber.nativeString();
+
+(async () => {
+    await matcher.addP('foo.*', 'it matched!');
+    assert.deepEqual(await matcher.matchP('foo.bar'), ['it matched!']);
+    assert(await matcher.testP('foo.bar', 'it matched!'));
+})();
+```
+
+## Worker Thread Example
+
+Same again but the matching is done on a separate thread:
+
+```
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+const {
+    Worker, isMainThread, parentPort, workerData
+} = require('worker_threads');
+
+if (isMainThread) {
+    const matcher = new Qlobber.nativeString();
+    matcher.add('foo.*', 'it matched!');
+    const worker = new Worker(__filename, {
+        workerData: matcher.state_address
+    });
+    worker.on('message', msg => {
+        const assert = require('assert');
+        assert.deepEqual(msg, [['it matched!'], true]);
+    });
+} else {
+    const matcher = new Qlobber.nativeString(workerData);
+    parentPort.postMessage([
+        matcher.match('foo.bar'),
+        matcher.test('foo.bar', 'it matched!')
+    ]);
+}
+```
+
+## Licence
+
+[MIT](LICENCE)
+
+## Tests
+
+qlobber passes the [RabbitMQ topic tests](https://github.com/rabbitmq/rabbitmq-server/blob/master/src/rabbit_tests.erl) (I converted them from Erlang to Javascript).
+
+To run the tests:
+
+```shell
+npm test
+```
+
+## Lint
+
+```shell
+grunt lint
+```
+
+## Code Coverage
+
+```shell
+npm run coverage
+```
+
+[c8](https://github.com/bcoe/c8) results are available [here](http://rawgit.davedoesdev.com/davedoesdev/qlobber/master/coverage/lcov-report/index.html).
+
+Coveralls page is [here](https://coveralls.io/r/davedoesdev/qlobber).
+
+## Benchmarks
+
+```shell
+grunt bench
+```
+
+qlobber is also benchmarked in [ascoltatori](https://github.com/mcollina/ascoltatori).
+
+## Native Qlobbers
+
+The Javascript Qlobbers don't support asynchronous calls and worker threads
+because Javascript values can't be shared between threads.
+
+In order to support asynchronous calls and worker threads, a native C++
+implementation is available in the
+[qlobber-native](https://www.npmjs.com/package/qlobber-native) module.
+
+Add qlobber-native as a dependency to your project and then add it to qlobber
+like this:
+
+```javascript
+require('qlobber').set_native(require('qlobber-native'));
+```
+
+Note that [`set_native`](#set_nativeqlobber_native) returns qlobber's exports so you can do something like
+this:
+
+```javascript
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+```
+
+Note that qlobber-native requires Gnu C++ version 9+ and Boost 1.70+,
+including the `boost_context` runtime library.
+
+Once's you've added it to qlobber, the following classes will be available
+alongside the Javascript classes:
+
+- `Qlobber.nativeString`
+- `Qlobber.nativeNumber`
+- `QlobberDedup.nativeString`
+- `QlobberDedup.nativeNumber`
+- `QlobberTrue.native`
+
+They can only hold values of a single type (currently strings or numbers).
+
+### Asynchronous calls
+
+The native classes support the same API as the Javascript classes but have the
+following additional methods:
+
+- `addP`
+- `removeP`
+- `matchP`
+- `match_iterP`
+- `testP`
+- `clearP`
+- `visitP`
+- `get_restorerP`
+
+They correspond to their namesakes but return Promises. Note that `match_iterP`
+and `visitP` return async iterators.
+
+# API
+*/
+
+/*jslint node: true, nomen: true */
+"use strict";
+
+var util = require('util');
+
+/**
+Creates a new qlobber.
+
+@constructor
+@param {Object} [options] Configures the qlobber. Use the following properties:
+- `{String} separator` The character to use for separating words in topics. Defaults to '.'. MQTT uses '/' as the separator, for example.
+
+- `{String} wildcard_one` The character to use for matching exactly one _non-empty_ word in a topic. Defaults to '*'. MQTT uses '+', for example.
+
+- `{String} wildcard_some` The character to use for matching zero or more words in a topic. Defaults to '#'. MQTT uses '#' too.
+
+- `{Boolean} match_empty_levels` If `true` then `wilcard_one` also matches an empty word in a topic. Defaults to `false`.
+
+- `{Boolean|Map} cache_adds` Whether to cache topics when adding topic matchers. This will make adding multiple matchers for the same topic faster at the cost of extra memory usage. Defaults to `false`. If you supply a `Map` then it will be used to cache the topics (use this to enumerate all the topics in the qlobber).
+
+- `{Integer} cache_splits` How many `topic.split` results to cache. When you pass in a topic, it has to be split on the `separator`. Caching the results will make using the same topics multiple times faster at the cost of extra memory usage. Defaults to `0` (no caching). The number of split results cached is limited by the value you pass here.
+
+- `{Integer} max_words` Maximum number of words to allow in a topic. Defaults to 100.
+
+- `{Integer} max_wildcard_somes` Maximum number of `wildcard_some` words in a topic. Defaults to 3.
+*/
+function Qlobber (options)
+{
+    options = options || {};
+
+    this._separator = options.separator || '.';
+    this._wildcard_one = options.wildcard_one || '*';
+    this._wildcard_some = options.wildcard_some || '#';
+    this._max_words = options.max_words || 100;
+    this._max_wildcard_somes = options.max_wildcard_somes || 3;
+    this._match_empty_levels = options.match_empty_levels;
+    this._trie = new Map();
+    if (options.cache_adds instanceof Map)
+    {
+        this._shortcuts = options.cache_adds;
+    }
+    else if (options.cache_adds)
+    {
+        this._shortcuts = new Map();
+    }
+    if (options.cache_splits > 0)
+    {
+        this._cache_splits = options.cache_splits;
+        this._split_cache = new Map();
+    }
+}
+
+Qlobber.prototype._initial_value = function (val)
+{
+    return [val];
+};
+
+Qlobber.prototype._add_value = function (vals, val)
+{
+    vals[vals.length] = val;
+};
+
+Qlobber.prototype._add_values = function (dest, origin)
+{
+    var i, destLength = dest.length, originLength = origin.length;
+
+    for (i = 0; i < originLength; i += 1)
+    {
+        dest[destLength + i] = origin[i];
+    }
+};
+
+Qlobber.prototype._iter_values = function (origin, ctx)
+{
+    return origin[Symbol.iterator](ctx);
+};
+
+Qlobber.prototype._remove_value = function (vals, val)
+{
+    if (val === undefined)
+    {
+        return true;
+    }
+
+    var index = vals.lastIndexOf(val);
+
+    if (index >= 0)
+    {
+        vals.splice(index, 1);
+    }
+
+    return vals.length === 0;
+};
+
+Qlobber.prototype._add = function (val, i, words, sub_trie)
+{
+    var st, word;
+
+    if (i === words.length)
+    {
+        st = sub_trie.get(this._separator);
+        
+        if (st)
+        {
+            this._add_value(st, val);
+        }
+        else
+        {
+            st = this._initial_value(val);
+            sub_trie.set(this._separator, st);
+        }
+        
+        return st;
+    }
+
+    word = words[i];
+    st = sub_trie.get(word);
+    
+    if (!st)
+    {
+        st = new Map();
+        sub_trie.set(word, st);
+    }
+    
+    return this._add(val, i + 1, words, st);
+};
+
+Qlobber.prototype._remove = function (val, i, words, sub_trie)
+{
+    var st, word, r;
+
+    if (i === words.length)
+    {
+        st = sub_trie.get(this._separator);
+
+        if (st && this._remove_value(st, val))
+        {
+            sub_trie.delete(this._separator);
+            return true;
+        }
+
+        return false;
+    }
+    
+    word = words[i];
+    st = sub_trie.get(word);
+
+    if (!st)
+    {
+        return false;
+    }
+
+    r = this._remove(val, i + 1, words, st);
+
+    if (st.size === 0)
+    {
+        sub_trie.delete(word);
+    }
+
+    return r;
+};
+
+Qlobber.prototype._match_some = function (v, i, words, st, ctx)
+{
+    var j, w;
+
+    for (w of st.keys())
+    {
+        if (w !== this._separator)
+        {
+            for (j = i; j < words.length; j += 1)
+            {
+                v = this._match(v, j, words, st, ctx);
+            }
+            break;
+        }
+    }
+
+    return v;
+};
+
+Qlobber.prototype._match = function (v, i, words, sub_trie, ctx)
+{
+    var word, st;
+
+    st = sub_trie.get(this._wildcard_some);
+
+    if (st)
+    {
+        // in the common case there will be no more levels...
+        v = this._match_some(v, i, words, st, ctx);
+        // and we'll end up matching the rest of the words:
+        v = this._match(v, words.length, words, st, ctx);
+    }
+
+    if (i === words.length)
+    {
+        st = sub_trie.get(this._separator);
+
+        if (st)
+        {
+            if (v.dest)
+            {
+                this._add_values(v.dest, v.source, ctx);
+                this._add_values(v.dest, st, ctx);
+                v = v.dest;
+            }
+            else if (v.source)
+            {
+                v.dest = v.source;
+                v.source = st;
+            }
+            else
+            {
+                this._add_values(v, st, ctx);
+            }
+        }
+    }
+    else
+    {
+        word = words[i];
+
+        if ((word !== this._wildcard_one) && (word !== this._wildcard_some))
+        {
+            st = sub_trie.get(word);
+
+            if (st)
+            {
+                v = this._match(v, i + 1, words, st, ctx);
+            }
+        }
+
+        if (word || this._match_empty_levels)
+        {
+            st = sub_trie.get(this._wildcard_one);
+
+            if (st)
+            {
+                v = this._match(v, i + 1, words, st, ctx);
+            }
+        }
+    }
+
+    return v;
+};
+
+Qlobber.prototype._match2 = function (v, topic, ctx)
+{
+    var vals = this._match(
+    {
+        source: v
+    }, 0, this._split(topic, false), this._trie, ctx);
+
+    return vals.source || vals;
+};
+
+Qlobber.prototype._test_some = function (v, i, words, st)
+{
+    var j, w;
+
+    for (w of st.keys())
+    {
+        if (w !== this._separator)
+        {
+            for (j = i; j < words.length; j += 1)
+            {
+                if (this._test(v, j, words, st))
+                {
+                    return true;
+                }
+            }
+            break;
+        }
+    }
+
+    return false;
+};
+
+Qlobber.prototype._test = function (v, i, words, sub_trie)
+{
+    var word, st;
+
+    st = sub_trie.get(this._wildcard_some);
+
+    if (st)
+    {
+            // in the common case there will be no more levels...
+        if (this._test_some(v, i, words, st) ||
+            // and we'll end up matching the rest of the words:
+            this._test(v, words.length, words, st))
+        {
+            return true;
+        }
+    }
+
+    if (i === words.length)
+    {
+        st = sub_trie.get(this._separator);
+
+        if (st && this.test_values(st, v))
+        {
+            return true;
+        }
+    }
+    else
+    {
+        word = words[i];
+
+        if ((word !== this._wildcard_one) && (word !== this._wildcard_some))
+        {
+            st = sub_trie.get(word);
+
+            if (st && this._test(v, i + 1, words, st))
+            {
+                return true;
+            }
+        }
+
+        if (word || this._match_empty_levels)
+        {
+            st = sub_trie.get(this._wildcard_one);
+
+            if (st && this._test(v, i + 1, words, st))
+            {
+                return true;
+            }
+        }
+    }
+
+    return false;
+};
+
+Qlobber.prototype._match_some_iter = function* (i, words, st, ctx)
+{
+    var j, w;
+
+    for (w of st.keys())
+    {
+        if (w !== this._separator)
+        {
+            for (j = i; j < words.length; j += 1)
+            {
+                yield* this._match_iter(j, words, st, ctx);
+            }
+            break;
+        }
+    }
+};
+
+Qlobber.prototype._match_iter = function* (i, words, sub_trie, ctx)
+{
+    var word, st;
+
+    st = sub_trie.get(this._wildcard_some);
+
+    if (st)
+    {
+        // in the common case there will be no more levels...
+        yield* this._match_some_iter(i, words, st, ctx);
+        // and we'll end up matching the rest of the words:
+        yield* this._match_iter(words.length, words, st, ctx);
+    }
+
+    if (i === words.length)
+    {
+        st = sub_trie.get(this._separator);
+
+        if (st)
+        {
+            yield* this._iter_values(st, ctx);
+        }
+    }
+    else
+    {
+        word = words[i];
+
+        if ((word !== this._wildcard_one) && (word !== this._wildcard_some))
+        {
+            st = sub_trie.get(word);
+
+            if (st)
+            {
+                yield* this._match_iter(i + 1, words, st, ctx);
+            }
+        }
+
+        if (word || this._match_empty_levels)
+        {
+            st = sub_trie.get(this._wildcard_one);
+
+            if (st)
+            {
+                yield* this._match_iter(i + 1, words, st, ctx);
+            }
+        }
+    }
+};
+
+Qlobber.prototype._split_words = function (topic) {
+    const r = topic.split(this._separator);
+    if (r.length > this._max_words) {
+        throw new Error('too many words');
+    }
+    return r;
+};
+
+Qlobber.prototype._split = function (topic, adding) {
+    let r;
+    if (this._split_cache) {
+        r = this._split_cache.get(topic);
+        if (r === undefined) {
+            r = this._split_words(topic);
+            this._split_cache.set(topic, r);
+            if (this._split_cache.size > this._cache_splits) {
+                for (let t of this._split_cache.keys()) {
+                    this._split_cache.delete(t);
+                    break;
+                }
+            }
+        }
+    } else {
+        r = this._split_words(topic);
+    }
+    if (adding &&
+        (r.reduce((n, w) => n + (w === this._wildcard_some), 0) > this._max_wildcard_somes)) {
+        throw new Error('too many wildcard somes');
+    }
+    return r;
+};
+
+/**
+Add a topic matcher to the qlobber.
+
+Note you can match more than one value against a topic by calling `add` multiple times with the same topic and different values.
+
+@param {String} topic The topic to match against.
+@param {Any} val The value to return if the topic is matched.
+@return {Qlobber} The qlobber (for chaining).
+*/
+Qlobber.prototype.add = function (topic, val)
+{
+    var shortcut = this._shortcuts && this._shortcuts.get(topic);
+    if (shortcut)
+    {
+        this._add_value(shortcut, val);
+    }
+    else
+    {
+        shortcut = this._add(val, 0, this._split(topic, true), this._trie);
+        if (this._shortcuts)
+        {
+            this._shortcuts.set(topic, shortcut);
+        }
+    }
+    return this;
+};
+
+/**
+Remove a topic matcher from the qlobber.
+
+@param {String} topic The topic that's being matched against.
+@param {Any} [val] The value that's being matched. If you don't specify `val` then all matchers for `topic` are removed.
+@return {Qlobber} The qlobber (for chaining).
+*/
+Qlobber.prototype.remove = function (topic, val)
+{
+    if (this._remove(val, 0, this._split(topic, false), this._trie) && this._shortcuts)
+    {
+        this._shortcuts.delete(topic);
+    }
+    return this;
+};
+
+/**
+Match a topic.
+
+@param {String} topic The topic to match against.
+@return {Array} List of values that matched the topic. This may contain duplicates. Use a [`QlobberDedup`](#qlobberdedupoptions) if you don't want duplicates.
+*/
+Qlobber.prototype.match = function (topic, ctx)
+{
+    return this._match2([], topic, ctx);
+};
+
+/**
+Match a topic, returning the matches one at a time.
+
+@return {Iterator} An iterator on the values that match the topic. There may be duplicate values, even if you use a [`QlobberDedup`](#qlobberdedupoptions).
+*/
+Qlobber.prototype.match_iter = function (topic, ctx)
+{
+    return this._match_iter(0, this._split(topic, false), this._trie, ctx);
+};
+
+/**
+Test whether a topic match contains a value. Faster than calling [`match`](#qlobberprototypematchtopic) and searching the result for the value. Values are tested using [`test_values`](#qlobberprototypetest_valuesvals-val).
+
+@param {String} topic The topic to match against.
+@param {Any} val The value being tested for.
+@return {Boolean} Whether matching against `topic` contains `val`.
+*/
+Qlobber.prototype.test = function (topic, val)
+{
+    return this._test(val, 0, this._split(topic, false), this._trie);
+};
+
+/**
+Test whether values found in a match contain a value passed to [`test`](#qlobberprototypetesttopic-val). You can override this to provide a custom implementation. Defaults to using `indexOf`.
+
+@param {Array} vals The values found while matching.
+@param {Any} val The value being tested for.
+@return {Boolean} Whether `vals` contains `val`.
+*/
+Qlobber.prototype.test_values = function (vals, val)
+{
+    return vals.indexOf(val) >= 0;
+};
+
+/**
+Reset the qlobber.
+
+Removes all topic matchers from the qlobber.
+
+@return {Qlobber} The qlobber (for chaining).
+*/
+Qlobber.prototype.clear = function ()
+{
+    this._trie.clear();
+    if (this._shortcuts)
+    {
+        this._shortcuts.clear();
+    }
+    if (this._split_cache)
+    {
+        this._split_cache.clear();
+    }
+    return this;
+};
+
+// for debugging
+Qlobber.prototype.get_trie = function ()
+{
+    return this._trie;
+};
+
+/**
+Visit each node in the qlobber's trie in turn.
+
+@return {Iterator} An iterator on the trie. The iterator returns objects which, if fed (in the same order) to the function returned by [`get_restorer`](#qlobberprototypeget_restoreroptions) on a different qlobber, will build that qlobber's trie to the same state. The objects can be serialized using `JSON.stringify`, _if_ the values you store in the qlobber are also serializable.
+*/
+Qlobber.prototype.visit = function* ()
+{
+    let iterators = [],
+        iterator = this._trie.entries(),
+        i = 0;
+
+    while (true)
+    {
+        if (i === 0)
+        {
+            yield { type: 'start_entries' };
+        }
+
+        let next = iterator.next();
+
+        if (next.done)
+        {
+            yield { type: 'end_entries' };
+
+            let prev = iterators.pop();
+            if (prev === undefined)
+            {
+                return;
+            }
+
+            [iterator, i] = prev;
+            continue;
+        }
+
+        let [key, value] = next.value;
+        yield { type: 'entry', key: key };
+        ++i;
+
+        if (key === this._separator)
+        {
+            yield { type: 'start_values' };
+
+            if (value[Symbol.iterator])
+            {
+                for (let v of value)
+                {
+                    yield { type: 'value', value: v };
+                }
+            }
+            else
+            {
+                yield { type: 'value', value: value };
+            }
+
+            yield { type: 'end_values' };
+            continue;
+        }
+
+        iterators.push([iterator, i]);
+        iterator = value.entries();
+        i = 0;
+    }
+};
+
+/**
+Get a function which can restore the qlobber's trie to a state you retrieved
+by calling [`visit`](#qlobberprototypevisit) on this or another qlobber.
+
+@param {Object} [options] Options for restoring the trie.
+- `{Boolean} cache_adds` Whether to cache topics when rebuilding the trie. This only applies if you also passed `cache_adds` as true in the [constructor](#qlobberoptions).
+
+@return {Function} Function to call in order to rebuild the qlobber's trie. You should call this repeatedly with the objects you received from a call to [`visit`](#qlobberprototypevisit). If you serialized the objects, remember to deserialize them first (e.g. with `JSON.parse`)!
+*/
+Qlobber.prototype.get_restorer = function (options)
+{
+    options = options || {};
+
+    let sts = [],
+        entry = this._trie,
+        path = '';
+
+    return obj =>
+    {
+        switch (obj.type)
+        {
+            case 'entry':
+                entry = entry || new Map();
+                sts.push([entry, obj.key, path]);
+                entry = entry.get(obj.key);
+                if (options.cache_adds)
+                {
+                    if (path)
+                    {
+                        path += this._separator;
+                    }
+                    path += obj.key;
+                }
+                break;
+
+            case 'value':
+                if (entry)
+                {
+                    this._add_value(entry, obj.value);
+                }
+                else
+                {
+                    entry = this._initial_value(obj.value);
+                }
+                break;
+
+            case 'end_entries':
+                if (entry && (entry.size === 0))
+                {
+                    entry = undefined;
+                }
+                /* falls through */
+
+            case 'end_values':
+                let prev = sts.pop();
+                if (prev === undefined)
+                {
+                    entry = undefined;
+                    path = '';
+                }
+                else
+                {
+                    let [prev_entry, key, prev_path] = prev;
+                    if (entry)
+                    {
+                        if (options.cache_adds &&
+                            this._shortcuts &&
+                            (obj.type === 'end_values'))
+                        {
+                            this._shortcuts.set(prev_path, entry);
+                        }
+                        prev_entry.set(key, entry);
+                    }
+                    entry = prev_entry;
+                    path = prev_path;
+                }
+                break;
+        }
+    };
+};
+
+/**
+Creates a new de-duplicating qlobber.
+
+Inherits from [`Qlobber`](#qlobberoptions).
+
+@constructor
+@param {Object} [options] Same options as Qlobber.
+*/
+function QlobberDedup (options)
+{
+    Qlobber.call(this, options);
+}
+
+util.inherits(QlobberDedup, Qlobber);
+
+QlobberDedup.prototype._initial_value = function (val)
+{
+    return new Set().add(val);
+};
+
+QlobberDedup.prototype._add_value = function (vals, val)
+{
+    vals.add(val);
+};
+
+QlobberDedup.prototype._add_values = function (dest, origin)
+{
+    origin.forEach(function (val)
+    {
+        dest.add(val);
+    });
+};
+
+QlobberDedup.prototype._remove_value = function (vals, val)
+{
+    if (val === undefined)
+    {
+        return true;
+    }
+
+    vals.delete(val);
+    return vals.size === 0;
+};
+
+/**
+Test whether values found in a match contain a value passed to [`test`](#qlobberprototypetesttopic_val). You can override this to provide a custom implementation. Defaults to using `has`.
+
+@param {Set} vals The values found while matching ([ES6 Set](http://www.ecma-international.org/ecma-262/6.0/#sec-set-objects)).
+@param {Any} val The value being tested for.
+@return {Boolean} Whether `vals` contains `val`.
+*/
+QlobberDedup.prototype.test_values = function (vals, val)
+{
+    return vals.has(val);
+};
+
+/**
+Match a topic.
+
+@param {String} topic The topic to match against.
+@return {Set} [ES6 Set](http://www.ecma-international.org/ecma-262/6.0/#sec-set-objects) of values that matched the topic.
+*/
+QlobberDedup.prototype.match = function (topic, ctx)
+{
+    return this._match2(new Set(), topic, ctx);
+};
+
+/**
+Creates a new qlobber which only stores the value `true`.
+
+Whatever value you [`add`](#qlobberprototypeaddtopic-val) to this qlobber
+(even `undefined`), a single, de-duplicated `true` will be stored. Use this
+qlobber if you only need to test whether topics match, not about the values
+they match to.
+
+Inherits from [`Qlobber`](#qlobberoptions).
+
+@constructor
+@param {Object} [options] Same options as Qlobber.
+*/
+function QlobberTrue (options)
+{
+    Qlobber.call(this, options);
+}
+
+util.inherits(QlobberTrue, Qlobber);
+
+QlobberTrue.prototype._initial_value = function ()
+{
+    return true;
+};
+
+QlobberTrue.prototype._add_value = function ()
+{
+};
+
+QlobberTrue.prototype._remove_value = function ()
+{
+    return true;
+};
+
+QlobberTrue.prototype._iter_values = function* ()
+{
+    yield true;
+};
+
+/**
+This override of [`test_values`](#qlobberprototypetest_valuesvals-val) always
+returns `true`. When you call [`test`](#qlobberprototypetesttopic-val) on a
+`QlobberTrue` instance, the value you pass is ignored since it only cares
+whether a topic is matched.
+
+@return {Boolean} Always `true`.
+*/
+QlobberTrue.prototype.test_values = function ()
+{
+    return true;    
+};
+
+/**
+Match a topic.
+
+Since `QlobberTrue` only cares whether a topic is matched and not about values
+it matches to, this override of [`match`](#qlobberprototypematchtopic) just
+calls [`test`](#qlobberprototypetesttopic-val) (with value `undefined`).
+
+@param {String} topic The topic to match against.
+@return {Boolean} Whether the `QlobberTrue` instance matches the topic.
+*/
+QlobberTrue.prototype.match = function (topic, ctx)
+{
+    return this.test(topic, ctx);
+};
+
+let stream = require('stream');
+
+/**
+Creates a new [`Readable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_readable) stream, in object mode, which calls [`visit`](#qlobberprototypevisit) on a qlobber to generate its data.
+
+You could [`pipe`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_readable_pipe_destination_options) this to a [`JSONStream.stringify`](https://github.com/dominictarr/JSONStream#jsonstreamstringifyopen-sep-close) stream, for instance, to serialize the qlobber to JSON. See [this test](test/json.js#L14) for an example.
+
+Inherits from [`Readable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_readable).
+
+@constructor
+
+@param {Qlobber} qlobber The qlobber to call [`visit`](#qlobberprototypevisit) on.
+*/
+function VisitorStream (qlobber)
+{
+    stream.Readable.call(this, { objectMode: true });
+    this._iterator = qlobber.visit();
+}
+
+util.inherits(VisitorStream, stream.Readable);
+
+VisitorStream.prototype._read = function ()
+{
+    while (true)
+    {
+        let { done, value } = this._iterator.next();
+
+        if (done)
+        {
+            this.push(null);
+            break;
+        }
+
+        if (!this.push(value))
+        {
+            break;
+        }
+    }
+};
+
+/**
+Creates a new [`Writable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_writable) stream, in object mode, which passes data written to it into the function returned by calling [`get_restorer`](#qlobberprototypeget_restoreroptions) on a qlobber.
+
+You could [`pipe`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_readable_pipe_destination_options) a [`JSONStream.parse`](https://github.com/dominictarr/JSONStream#jsonstreamparsepath) stream to this, for instance, to deserialize the qlobber from JSON. See [this test](test/json.js#L33) for an example.
+
+Inherits from [`Writable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_writable).
+
+@constructor
+
+@param {Qlobber} qlobber The qlobber to call [`get_restorer`](#qlobberprototypeget_restoreroptions) on.
+*/
+function RestorerStream (qlobber)
+{
+    stream.Writable.call(this, { objectMode: true });
+    this._restorer = qlobber.get_restorer();
+}
+
+util.inherits(RestorerStream, stream.Writable);
+
+RestorerStream.prototype._write = function (value, _, cb)
+{
+    this._restorer(value);
+    cb();
+};
+
+let native_module = null;
+
+/**
+Add [qlobber-native](https://www.npmjs.com/package/qlobber-native) to qlobber.
+
+@param {Object} qlobber_native The qlobber-native module, obtained using `require('qlobber-native')`.
+@return {Object} The qlobber exports with the following native classes added:
+- `Qlobber.nativeString`
+- `Qlobber.nativeNumber`
+- `QlobberDedup.nativeString`
+- `QlobberDedup.nativeNumber`
+- `QlobberTrue.native`
+*/
+function set_native(qlobber_native)
+{
+    if (qlobber_native !== native_module)
+    {
+        const wrap_native = require('./wrap_native.js');
+        Qlobber.nativeString = wrap_native(qlobber_native.QlobberString, Qlobber);
+        Qlobber.nativeNumber = wrap_native(qlobber_native.QlobberNumber, Qlobber);
+        QlobberDedup.nativeString = wrap_native(qlobber_native.QlobberDedupString, QlobberDedup);
+        QlobberDedup.nativeNumber = wrap_native(qlobber_native.QlobberDedupNumber, QlobberDedup);
+        QlobberTrue.native = wrap_native(qlobber_native.QlobberTrue, QlobberTrue);
+        native_module = qlobber_native;
+    }
+
+    return exports;
+}
+
+exports.Qlobber = Qlobber;
+exports.QlobberDedup = QlobberDedup;
+exports.QlobberTrue = QlobberTrue;
+exports.VisitorStream = VisitorStream;
+exports.RestorerStream = RestorerStream;
+exports.set_native = set_native;
diff --git a/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/lib/wrap_native.js b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/lib/wrap_native.js
new file mode 100644
index 0000000..37267da
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/lib/wrap_native.js
@@ -0,0 +1,116 @@
+"use strict";
+
+const util = require('util');
+
+module.exports = function(QlobberNative, Qlobber)
+{
+    class WrappedQlobberNative extends QlobberNative
+    {
+        constructor(options) {
+            super(options);
+            this.addP = util.promisify(this.add_async);
+            this.removeP = util.promisify(this.remove_async);
+            this.matchP = util.promisify(this.match_async);
+            this.testP = util.promisify(this.test_async);
+            this.clearP = util.promisify(this.clear_async);
+            this._get_visitorP = util.promisify(this.get_visitor_async);
+            this._visit_nextP = util.promisify(this.visit_next_async);
+            this._get_restorerP = util.promisify(this.get_restorer_async);
+            this._restore_nextP = util.promisify(this.restore_next_async);
+            this._match_iterP = util.promisify(this.match_iter_async);
+            this._match_nextP = util.promisify(this.match_next_async);
+        }
+
+        *visit()
+        {
+            const visitor = this.get_visitor();
+
+            while (true)
+            {
+                const v = this.visit_next(visitor);
+                if (v === undefined)
+                {
+                    break;
+                }
+                yield v;
+            }
+        }
+
+        async *visitP()
+        {
+            const visitor = await this._get_visitorP();
+
+            while (true)
+            {
+                const v = await this._visit_nextP(visitor);
+                if (v === undefined)
+                {
+                    break;
+                }
+                yield v;
+            }
+        }
+
+        *match_iter(topic, ctx) {
+            const iterator = super.match_iter(topic, ctx);
+
+            while (true)
+            {
+                const v = this.match_next(iterator);
+                if (v === undefined)
+                {
+                    break;
+                }
+                yield v.value;
+            }
+        }
+
+        async *match_iterP(topic, ctx) {
+            const iterator = await this._match_iterP(topic, ctx);
+
+            while (true)
+            {
+                const v = await this._match_nextP(iterator);
+                if (v === undefined)
+                {
+                    break;
+                }
+                yield v.value;
+            }
+        }
+
+        get_trie()
+        {
+            const qlobber = new Qlobber(this.options);
+            const restorer = qlobber.get_restorer();
+
+            for (let v of this.visit())
+            {
+                restorer(v);
+            }
+
+            return qlobber.get_trie();
+        }
+
+        get_restorer(options)
+        {
+            const restorer = super.get_restorer(options);
+            return obj => {
+                super.restore_next(restorer, obj);
+            };
+        }
+
+        async get_restorerP(options)
+        {
+            const restorer = await this._get_restorerP(options);
+            return async obj => {
+                await this._restore_nextP(restorer, obj);
+            };
+        }
+    }
+
+    WrappedQlobberNative.is_native = true;
+    WrappedQlobberNative.nonNative = Qlobber;
+
+    return WrappedQlobberNative;
+};
diff --git a/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/package.json b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/package.json
new file mode 100644
index 0000000..af852a0
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/node_modules/qlobber/package.json
@@ -0,0 +1,54 @@
+{
+  "name": "qlobber",
+  "description": "Node.js globbing for amqp-like topics",
+  "version": "8.0.1",
+  "homepage": "https://github.com/davedoesdev/qlobber",
+  "author": {
+    "name": "David Halls",
+    "email": "dave@davedoesdev.com",
+    "url": "http://www.davedoesdev.com"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/davedoesdev/qlobber.git"
+  },
+  "bugs": {
+    "url": "https://github.com/davedoesdev/qlobber/issues"
+  },
+  "license": "MIT",
+  "main": "index.js",
+  "scripts": {
+    "test": "(cd native && npm install && node-gyp rebuild --debug) && grunt test",
+    "coverage": "(cd native && npm install && node-gyp rebuild --debug) && grunt coverage"
+  },
+  "directories": {
+    "test": "test",
+    "lib": "lib"
+  },
+  "keywords": [
+    "amqp",
+    "mqtt",
+    "rabbitmq",
+    "ascoltatore"
+  ],
+  "engines": {
+    "node": ">= 16"
+  },
+  "devDependencies": {
+    "@davedoesdev/b": "^5.0.3",
+    "c8": "^9.1.0",
+    "chai": "^5.0.3",
+    "grunt": "^1.6.1",
+    "grunt-apidox": "^3.1.1",
+    "grunt-contrib-jshint": "^3.2.0",
+    "grunt-exec": "^3.0.0",
+    "JSONStream": "^1.3.5",
+    "mocha": "^10.2.0",
+    "stream-buffers": "^3.0.2"
+  },
+  "overrides": {
+    "apidox": {
+      "dox": "^1.0.0"
+    }
+  }
+}
diff --git a/mqtt-backend/node_modules/mqemitter/package.json b/mqtt-backend/node_modules/mqemitter/package.json
new file mode 100644
index 0000000..6141107
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/package.json
@@ -0,0 +1,63 @@
+{
+  "name": "mqemitter",
+  "version": "6.0.2",
+  "description": "An Opinionated Message Queue with an emitter-style API",
+  "main": "mqemitter.js",
+  "types": "types/mqemitter.d.ts",
+  "scripts": {
+    "lint": "npm run lint:standard && npm run lint:typescript && npm run lint:markdown",
+    "lint:standard": "standard --verbose | snazzy",
+    "lint:typescript": "standard --parser @typescript-eslint/parser --plugin @typescript-eslint/eslint-plugin test/types/*.ts types/mqemitter.d.ts",
+    "lint:markdown": "markdownlint README.md",
+    "unit": "tape test/*.js",
+    "unit:report": "nyc --reporter=html --reporter=cobertura --reporter=text tape test/*.js",
+    "unit:cov": "nyc --reporter=text tape test/*.js",
+    "typescript": "tsc --project ./test/types/tsconfig.json",
+    "test:report": "npm run lint && npm run unit:report && npm run typescript",
+    "test:types": "tsd",
+    "test": "npm run lint && npm run unit:cov && tsd && npm run typescript"
+  },
+  "pre-commit": [
+    "test"
+  ],
+  "website": "https://github.com/mcollina/mqemitter",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mcollina/mqemitter.git"
+  },
+  "bugs": {
+    "url": "http://github.com/mcollina/mqemitter/issues"
+  },
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "engines": {
+    "node": ">=16"
+  },
+  "keywords": [
+    "emitter",
+    "events",
+    "message queue",
+    "mq",
+    "publish",
+    "subscribe",
+    "pub",
+    "sub"
+  ],
+  "license": "ISC",
+  "devDependencies": {
+    "@types/node": "^16.11.1",
+    "@typescript-eslint/eslint-plugin": "^7.8.0",
+    "@typescript-eslint/parser": "^7.8.0",
+    "markdownlint-cli": "^0.31.1",
+    "nyc": "^15.0.0",
+    "pre-commit": "^1.2.2",
+    "snazzy": "^9.0.0",
+    "standard": "^17.0.0",
+    "tape": "^5.0.1",
+    "tsd": "^0.31.0",
+    "typescript": "^5.4.5"
+  },
+  "dependencies": {
+    "fastparallel": "^2.4.1",
+    "qlobber": "^8.0.1"
+  }
+}
diff --git a/mqtt-backend/node_modules/mqemitter/test/test.js b/mqtt-backend/node_modules/mqemitter/test/test.js
new file mode 100644
index 0000000..5d82e45
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/test/test.js
@@ -0,0 +1,180 @@
+'use strict'
+
+const { test } = require('tape')
+const mq = require('../')
+
+require('../abstractTest')({
+  builder: mq,
+  test
+})
+
+test('queue concurrency', function (t) {
+  t.plan(3)
+
+  const e = mq({ concurrency: 1 })
+  let completed1 = false
+
+  t.equal(e.concurrency, 1)
+
+  e.on('hello 1', function (message, cb) {
+    setTimeout(cb, 10)
+  })
+
+  e.on('hello 2', function (message, cb) {
+    cb()
+  })
+
+  e.emit({ topic: 'hello 1' }, function () {
+    completed1 = true
+  })
+
+  e.emit({ topic: 'hello 2' }, function () {
+    t.ok(completed1, 'the first message must be completed')
+  })
+
+  t.equal(e.length, 1)
+})
+
+test('queue released when full', function (t) {
+  t.plan(21)
+
+  const e = mq({ concurrency: 1 })
+
+  e.on('hello 1', function (message, cb) {
+    t.ok(true, 'message received')
+    setTimeout(cb, 10)
+  })
+
+  function onSent () {
+    t.ok(true, 'message sent')
+  }
+
+  for (let i = 0; i < 9; i++) {
+    e._messageQueue.push({ topic: 'hello 1' })
+    e._messageCallbacks.push(onSent)
+    e.current++
+  }
+
+  e.emit({ topic: 'hello 1' }, onSent)
+
+  process.once('warning', function (warning) {
+    t.equal(warning.message, 'MqEmitter leak detected', 'warning message')
+  })
+})
+
+test('without any listeners and a callback', function (t) {
+  const e = mq()
+  const expected = {
+    topic: 'hello world',
+    payload: { my: 'message' }
+  }
+
+  e.emit(expected, function () {
+    t.equal(e.current, 1, 'there 1 message that is being processed')
+    e.close(function () {
+      t.end()
+    })
+  })
+})
+
+test('queue concurrency with overlapping subscriptions', function (t) {
+  t.plan(3)
+
+  const e = mq({ concurrency: 1 })
+  let completed1 = false
+
+  t.equal(e.concurrency, 1)
+
+  e.on('000001/021/#', function (message, cb) {
+    setTimeout(cb, 10)
+  })
+
+  e.on('000001/021/000B/0001/01', function (message, cb) {
+    setTimeout(cb, 20)
+  })
+
+  e.emit({ topic: '000001/021/000B/0001/01' }, function () {
+    completed1 = true
+  })
+
+  e.emit({ topic: '000001/021/000B/0001/01' }, function () {
+    t.ok(completed1, 'the first message must be completed')
+    process.nextTick(function () {
+      t.equal(e.current, 0, 'no message is in flight')
+    })
+  })
+})
+
+test('removeListener without a callback does not throw', function (t) {
+  const e = mq()
+  function fn () {}
+
+  e.on('hello', fn)
+  e.removeListener('hello', fn)
+
+  t.end()
+})
+
+test('removeAllListeners removes listeners', function (t) {
+  const e = mq()
+
+  e.on('hello', function () {
+    t.fail('listener called')
+  })
+
+  e.removeAllListeners('hello', function () {
+    e.emit({ topic: 'hello' }, function () {
+      t.end()
+    })
+  })
+})
+
+test('removeAllListeners without a callback does not throw', function (t) {
+  const e = mq()
+  function fn () {}
+
+  e.on('hello', fn)
+  e.removeAllListeners('hello')
+
+  t.end()
+})
+
+test('set defaults to opts', function (t) {
+  const opts = {}
+  mq(opts)
+
+  t.deepEqual(opts, {
+    matchEmptyLevels: true,
+    separator: '/',
+    wildcardOne: '+',
+    wildcardSome: '#'
+  })
+
+  t.end()
+})
+
+test('removeListener inside messageHandler', function (t) {
+  t.plan(3)
+
+  const e = mq()
+
+  function messageHandler1 (message, cb) {
+    t.ok(true, 'messageHandler1 called')
+    // removes itself
+    e.removeListener('hello', messageHandler1)
+    cb()
+  }
+
+  e.on('hello', messageHandler1)
+
+  function messageHandler2 (message, cb) {
+    t.ok(true, 'messageHandler2 called')
+    cb()
+  }
+
+  e.on('hello', messageHandler2)
+
+  e.emit({ topic: 'hello' }, function () {
+    t.ok(true, 'emit callback received')
+  })
+})
diff --git a/mqtt-backend/node_modules/mqemitter/test/types/index.ts b/mqtt-backend/node_modules/mqemitter/test/types/index.ts
new file mode 100644
index 0000000..98457ab
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/test/types/index.ts
@@ -0,0 +1,46 @@
+/* eslint no-unused-vars: 0 */
+/* eslint no-undef: 0 */
+
+import MQEmitter, { Message } from '../../types/mqemitter'
+
+const noop = function () {}
+
+let mq = MQEmitter()
+mq = MQEmitter({
+  concurrency: 100
+})
+mq.close(noop)
+
+mq = MQEmitter({
+  concurrency: 100,
+  matchEmptyLevels: true,
+  separator: ','
+})
+mq.close(noop)
+
+mq = MQEmitter({
+  concurrency: 10,
+  matchEmptyLevels: true,
+  separator: '/',
+  wildcardOne: '+',
+  wildcardSome: '#'
+})
+
+const notify = function (msg: Message, cb: () => void) {
+  if (msg.topic === 'hello/world') {
+    console.log(msg)
+  }
+  cb()
+}
+
+mq.on('hello/+', notify)
+
+mq.emit({ topic: 'hello/world', payload: 'or any other fields', [Symbol.for('me')]: 42 })
+
+mq.emit({ topic: 'hello/world' }, function (err) {
+  console.log(err)
+})
+
+mq.removeListener('hello/+', notify)
+
+mq.close(noop)
diff --git a/mqtt-backend/node_modules/mqemitter/test/types/tsconfig.json b/mqtt-backend/node_modules/mqemitter/test/types/tsconfig.json
new file mode 100644
index 0000000..7914842
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/test/types/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "target": "es6",
+    "noEmit": true,
+    "strict": true
+  },
+  "files": [
+    "./index.ts"
+  ]
+}
diff --git a/mqtt-backend/node_modules/mqemitter/types/mqemitter.d.ts b/mqtt-backend/node_modules/mqemitter/types/mqemitter.d.ts
new file mode 100644
index 0000000..62f7cdd
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/types/mqemitter.d.ts
@@ -0,0 +1,22 @@
+/// <reference types="node" />
+
+interface MQEmitterOptions {
+  concurrency?: number
+  matchEmptyLevels?: boolean
+  separator?: string
+  wildcardOne?: string
+  wildcardSome?: string
+}
+
+export type Message = Record<string, any> & { topic: string }
+
+export interface MQEmitter {
+  current: number
+  concurrent: number
+  on(topic: string, listener: (message: Message, done: () => void) => void, callback?: () => void): this
+  emit(message: Message, callback?: (error?: Error) => void): void
+  removeListener(topic: string, listener: (message: Message, done: () => void) => void, callback?: () => void): void
+  close(callback: () => void): void
+}
+
+export default function (options?: MQEmitterOptions): MQEmitter
diff --git a/mqtt-backend/node_modules/mqemitter/types/mqemitter.test-d.ts b/mqtt-backend/node_modules/mqemitter/types/mqemitter.test-d.ts
new file mode 100644
index 0000000..6c9e737
--- /dev/null
+++ b/mqtt-backend/node_modules/mqemitter/types/mqemitter.test-d.ts
@@ -0,0 +1,32 @@
+import { expectError, expectType } from 'tsd';
+import mqEmitter, { Message, MQEmitter } from './mqemitter';
+
+expectType<MQEmitter>(mqEmitter());
+
+expectType<MQEmitter>(mqEmitter({ concurrency: 200, matchEmptyLevels: true }));
+
+expectType<MQEmitter>(
+  mqEmitter({
+    concurrency: 10,
+    matchEmptyLevels: true,
+    separator: '/',
+    wildcardOne: '+',
+    wildcardSome: '#',
+  })
+);
+
+function listener(message: Message, done: () => void) {}
+
+expectType<MQEmitter>(mqEmitter().on('topic', listener));
+
+expectError(mqEmitter().emit(null));
+
+expectType<void>(
+  mqEmitter().emit({ topic: 'test', prop1: 'prop1', [Symbol.for('me')]: 42 })
+);
+
+expectType<void>(mqEmitter().emit({ topic: 'test', prop1: 'prop1' }, () => {}));
+
+expectType<void>(mqEmitter().removeListener('topic', listener));
+
+expectType<void>(mqEmitter().close(() => null));
diff --git a/mqtt-backend/node_modules/mqtt-packet/.github/workflows/ci.yml b/mqtt-backend/node_modules/mqtt-packet/.github/workflows/ci.yml
new file mode 100644
index 0000000..121e4b8
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/.github/workflows/ci.yml
@@ -0,0 +1,27 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [16.x, 18.x, 20.x]
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Use Node.js
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Run tests
+        run: |
+          npm run ci
diff --git a/mqtt-backend/node_modules/mqtt-packet/CONTRIBUTING.md b/mqtt-backend/node_modules/mqtt-packet/CONTRIBUTING.md
new file mode 100644
index 0000000..cbe1f77
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/CONTRIBUTING.md
@@ -0,0 +1,27 @@
+# mqtt-packet is an OPEN Open Source Project
+
+-----------------------------------------
+
+## What?
+
+Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.
+
+## Rules
+
+There are a few basic ground-rules for contributors:
+
+1. **No `--force` pushes** or modifying the Git history in any way.
+1. **Non-master branches** ought to be used for ongoing work.
+1. **External API changes and significant modifications** ought to be subject to an **internal pull-request** to solicit feedback from other contributors.
+1. Internal pull-requests to solicit feedback are *encouraged* for any other non-trivial contribution but left to the discretion of the contributor.
+1. Contributors should attempt to adhere to the prevailing code-style.
+
+## Releases
+
+Declaring formal releases remains the prerogative of the project maintainer.
+
+## Changes to this arrangement
+
+This is an experiment and feedback is welcome! This document may also be subject to pull-requests or changes by contributors where you believe you have something valuable to add or change.
+
+-----------------------------------------
diff --git a/mqtt-backend/node_modules/mqtt-packet/LICENSE.md b/mqtt-backend/node_modules/mqtt-packet/LICENSE.md
new file mode 100644
index 0000000..833b757
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/LICENSE.md
@@ -0,0 +1,13 @@
+The MIT License (MIT)
+=====================
+
+Copyright (c) 2014-2017 mqtt-packet contributors
+---------------------------------------
+
+*mqtt-packet contributors listed at <https://github.com/mqttjs/mqtt-packet#contributors>*
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/mqtt-packet/README.md b/mqtt-backend/node_modules/mqtt-packet/README.md
new file mode 100644
index 0000000..01439f6
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/README.md
@@ -0,0 +1,491 @@
+mqtt-packet
+===========
+
+Encode and Decode MQTT 3.1.1, 5.0 packets the node way.
+
+[![JavaScript Style Guide](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard)
+
+  * <a href="#installation">Installation</a>
+  * <a href="#examples">Examples</a>
+  * <a href="#packets">Packets</a>
+  * <a href="#api">API</a>
+  * <a href="#contributing">Contributing</a>
+  * <a href="#license">License &amp; copyright</a>
+
+This library is tested with node v6, v8, v10, v12 and v14. The last version to support
+older versions of node was mqtt-packet@4.1.2.
+
+Installation
+------------
+
+```bash
+npm install mqtt-packet --save
+```
+
+Examples
+--------
+
+### Generating
+
+```js
+const mqtt = require('mqtt-packet');
+const object = {
+  cmd: 'publish',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 10,
+  topic: 'test',
+  payload: 'test' // Can also be a Buffer
+};
+const opts = { protocolVersion: 4 }; // default is 4. Usually, opts is a connect packet
+
+console.log(mqtt.generate(object))
+// Prints:
+//
+// <Buffer 30 0a 00 04 74 65 73 74 74 65 73 74>
+//
+// Which is the same as:
+//
+// Buffer.from([
+//   48, 10, // Header (publish)
+//   0, 4, // Topic length
+//   116, 101, 115, 116, // Topic (test)
+//   116, 101, 115, 116 // Payload (test)
+// ])
+```
+
+### Parsing
+
+```js
+const mqtt = require('mqtt-packet');
+const opts = { protocolVersion: 4 }; // default is 4. Usually, opts is a connect packet
+const parser = mqtt.parser(opts);
+
+// Synchronously emits all the parsed packets
+parser.on('packet', packet => {
+  console.log(packet)
+  // Prints:
+  //
+  // {
+  //   cmd: 'publish',
+  //   retain: false,
+  //   qos: 0,
+  //   dup: false,
+  //   length: 10,
+  //   topic: 'test',
+  //   payload: <Buffer 74 65 73 74>
+  // }
+})
+
+parser.parse(Buffer.from([
+  48, 10, // Header (publish)
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  116, 101, 115, 116 // Payload (test)
+]))
+// Returns the number of bytes left in the parser
+```
+
+API
+---
+
+  * <a href="#generate"><code>mqtt#<b>generate()</b></code></a>
+  * <a href="#writeToStream"><code>mqtt#<b>writeToStream()</b></code></a>
+  * <a href="#parser"><code>mqtt#<b>parser()</b></code></a>
+
+<a name="generate">
+
+### mqtt.generate(object, [opts])
+
+Generates a `Buffer` containing an MQTT packet.
+The object must be one of the ones specified by the [packets](#packets)
+section. Throws an `Error` if a packet cannot be generated.
+
+<a name="writeToStream">
+
+### mqtt.writeToStream(object, stream, [opts])
+
+Writes the mqtt packet defined by `object` to the given stream.
+The object must be one of the ones specified by the [packets](#packets)
+section. Emits an `Error` on the stream if a packet cannot be generated.
+On node >= 0.12, this function automatically calls `cork()` on your stream,
+and then it calls `uncork()` on the next tick.
+By default cache for number buffers is enabled.
+It creates a list of buffers for faster write. To disable cache set `mqtt.writeToStream.cacheNumbers = false`.
+Should be set before any `writeToStream` calls.
+
+<a name="parser">
+
+### mqtt.parser([opts])
+
+Returns a new `Parser` object. `Parser` inherits from `EventEmitter` and
+will emit:
+
+  * `packet`, when a new packet is parsed, according to
+    [packets](#packets)
+  * `error`, if an error happens
+
+<a name="parse">
+
+#### Parser.parse(buffer)
+
+Parses a given `Buffer` and emits synchronously all the MQTT packets that
+are included. Returns the number of bytes left to parse.
+
+If an error happens, an `error` event will be emitted, but no `packet` events
+will be emitted after that. Calling `parse()` again clears the error and
+previous buffer, as if you created a new `Parser`.
+
+Packets
+-------
+
+This section describes the format of all packets emitted by the `Parser`
+and that you can input to `generate`.
+
+### Connect
+
+```js
+{
+  cmd: 'connect',
+  protocolId: 'MQTT', // Or 'MQIsdp' in MQTT 3.1 and 5.0
+  protocolVersion: 4, // Or 3 in MQTT 3.1, or 5 in MQTT 5.0
+  clean: true, // Can also be false
+  clientId: 'my-device',
+  keepalive: 0, // Seconds which can be any positive number, with 0 as the default setting
+  username: 'matteo',
+  password: Buffer.from('collina'), // Passwords are buffers
+  will: {
+    topic: 'mydevice/status',
+    payload: Buffer.from('dead'), // Payloads are buffers
+    properties: { // MQTT 5.0
+      willDelayInterval: 1234,
+      payloadFormatIndicator: false,
+      messageExpiryInterval: 4321,
+      contentType: 'test',
+      responseTopic: 'topic',
+      correlationData: Buffer.from([1, 2, 3, 4]),
+      userProperties: {
+        'test': 'test'
+      }
+    }
+  },
+  properties: { // MQTT 5.0 properties
+      sessionExpiryInterval: 1234,
+      receiveMaximum: 432,
+      maximumPacketSize: 100,
+      topicAliasMaximum: 456,
+      requestResponseInformation: true,
+      requestProblemInformation: true,
+      userProperties: {
+        'test': 'test'
+      },
+      authenticationMethod: 'test',
+      authenticationData: Buffer.from([1, 2, 3, 4])
+  }
+}
+```
+
+If `protocolVersion` is 3, `clientId` is mandatory and `generate` will throw if
+missing.
+
+If `password` or `will.payload` are passed as strings, they will
+automatically be converted into a `Buffer`.
+
+### Connack
+
+```js
+{
+  cmd: 'connack',
+  returnCode: 0, // Or whatever else you see fit MQTT < 5.0
+  sessionPresent: false, // Can also be true.
+  reasonCode: 0, // reason code MQTT 5.0
+  properties: { // MQTT 5.0 properties
+      sessionExpiryInterval: 1234,
+      receiveMaximum: 432,
+      maximumQoS: 1,
+      retainAvailable: true,
+      maximumPacketSize: 100,
+      assignedClientIdentifier: 'test',
+      topicAliasMaximum: 456,
+      reasonString: 'test',
+      userProperties: {
+        'test': 'test'
+      },
+      wildcardSubscriptionAvailable: true,
+      subscriptionIdentifiersAvailable: true,
+      sharedSubscriptionAvailable: false,
+      serverKeepAlive: 1234,
+      responseInformation: 'test',
+      serverReference: 'test',
+      authenticationMethod: 'test',
+      authenticationData: Buffer.from([1, 2, 3, 4])
+  }
+}
+```
+
+The only mandatory argument is `returnCode`, as `generate` will throw if
+missing.
+
+### Subscribe
+
+```js
+{
+  cmd: 'subscribe',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    subscriptionIdentifier: 145,
+    userProperties: {
+      test: 'test'
+    }
+  }
+  subscriptions: [{
+    topic: 'test',
+    qos: 0,
+    nl: false, // no Local MQTT 5.0 flag
+    rap: true, // Retain as Published MQTT 5.0 flag
+    rh: 1 // Retain Handling MQTT 5.0
+  }]
+}
+```
+
+All properties are mandatory.
+
+### Suback
+
+```js
+{
+  cmd: 'suback',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    reasonString: 'test',
+    userProperties: {
+      'test': 'test'
+    }
+  }
+  granted: [0, 1, 2, 128]
+}
+```
+
+All the granted qos __must__ be < 256, as they are encoded as UInt8.
+All properties are mandatory.
+
+### Unsubscribe
+
+```js
+{
+  cmd: 'unsubscribe',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    userProperties: {
+      'test': 'test'
+    }
+  }
+  unsubscriptions: [
+    'test',
+    'a/topic'
+  ]
+}
+```
+
+All properties are mandatory.
+
+### Unsuback
+
+```js
+{
+  cmd: 'unsuback',
+  messageId: 42,
+  properties: { // MQTT 5.0 properties
+    reasonString: 'test',
+    userProperties: {
+      'test': 'test'
+    }
+  }
+}
+```
+
+All properties are mandatory.
+
+### Publish
+
+```js
+{
+  cmd: 'publish',
+  messageId: 42,
+  qos: 2,
+  dup: false,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  retain: false,
+  properties: { // optional properties MQTT 5.0
+      payloadFormatIndicator: true,
+      messageExpiryInterval: 4321,
+      topicAlias: 100,
+      responseTopic: 'topic',
+      correlationData: Buffer.from([1, 2, 3, 4]),
+      userProperties: {
+        'test': 'test'
+      },
+      subscriptionIdentifier: 120, // can be an Array in message from broker, if message included in few another subscriptions
+      contentType: 'test'
+   }
+}
+```
+
+Only the `topic` property is mandatory.
+Both `topic` and `payload` can be `Buffer` objects instead of strings.
+`messageId` is mandatory for `qos > 0`.
+
+### Puback
+
+```js
+{
+  cmd: 'puback',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // MQTT 5.0 properties
+      reasonString: 'test',
+      userProperties: {
+        'test': 'test'
+      }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pubrec
+
+```js
+{
+  cmd: 'pubrec',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // properties MQTT 5.0
+    reasonString: 'test',
+    userProperties: {
+      'test': 'test'
+    }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pubrel
+
+```js
+{
+  cmd: 'pubrel',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // properties MQTT 5.0
+     reasonString: 'test',
+     userProperties: {
+       'test': 'test'
+     }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pubcomp
+
+```js
+{
+  cmd: 'pubcomp',
+  messageId: 42,
+  reasonCode: 16, // only for MQTT 5.0
+  properties: { // properties MQTT 5.0
+    reasonString: 'test',
+    userProperties: {
+       'test': 'test'
+    }
+  }
+}
+```
+
+The only mandatory property is `messageId`, as `generate` will throw if
+missing.
+
+### Pingreq
+
+```js
+{
+  cmd: 'pingreq'
+}
+```
+
+### Pingresp
+
+```js
+{
+  cmd: 'pingresp'
+}
+```
+
+### Disconnect
+
+```js
+{
+  cmd: 'disconnect',
+  reasonCode: 0, // MQTT 5.0 code
+  properties: { // properties MQTT 5.0
+     sessionExpiryInterval: 145,
+     reasonString: 'test',
+     userProperties: {
+       'test': 'test'
+     },
+     serverReference: 'test'
+  }
+}
+```
+
+### Auth
+
+```js
+{
+  cmd: 'auth',
+  reasonCode: 0, // MQTT 5.0 code
+  properties: { // properties MQTT 5.0
+     authenticationMethod: 'test',
+     authenticationData: Buffer.from([0, 1, 2, 3]),
+     reasonString: 'test',
+     userProperties: {
+       'test': 'test'
+     }
+  }
+}
+```
+
+<a name="contributing"></a>
+
+Contributing
+------------
+
+mqtt-packet is an **OPEN Open Source Project**. This means that:
+
+> Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.
+
+See the [CONTRIBUTING.md](https://github.com/mqttjs/mqtt-packet/blob/master/CONTRIBUTING.md) file for more details.
+
+### Contributors
+
+mqtt-packet is only possible due to the excellent work of the following contributors:
+
+<table><tbody>
+<tr><th align="left">Matteo Collina</th><td><a href="https://github.com/mcollina">GitHub/mcollina</a></td><td><a href="http://twitter.com/matteocollina">Twitter/@matteocollina</a></td></tr>
+<tr><th align="left">Adam Rudd</th><td><a href="https://github.com/adamvr">GitHub/adamvr</a></td><td><a href="http://twitter.com/adam_vr">Twitter/@adam_vr</a></td></tr>
+<tr><th align="left">Peter Sorowka</th><td><a href="https://github.com/psorowka">GitHub/psorowka</a></td><td><a href="http://twitter.com/psorowka">Twitter/@psorowka</a></td></tr>
+<tr><th align="left">Siarhei Buntsevich</th><td><a href="https://github.com/scarry1992">GitHub/scarry1992</a></td></tr>
+</tbody></table>
+
+License
+-------
+
+MIT
diff --git a/mqtt-backend/node_modules/mqtt-packet/benchmarks/generate.js b/mqtt-backend/node_modules/mqtt-packet/benchmarks/generate.js
new file mode 100644
index 0000000..0d7ce7e
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/benchmarks/generate.js
@@ -0,0 +1,26 @@
+const mqtt = require('../')
+const max = 100000
+let i
+const buf = Buffer.from('test')
+
+// initialize it
+mqtt.generate({
+  cmd: 'publish',
+  topic: 'test',
+  payload: buf
+})
+
+const start = Date.now()
+
+for (i = 0; i < max; i++) {
+  mqtt.generate({
+    cmd: 'publish',
+    topic: 'test',
+    payload: buf
+  })
+}
+
+const time = Date.now() - start
+console.log('Total time', time)
+console.log('Total packets', max)
+console.log('Packet/s', max / time * 1000)
diff --git a/mqtt-backend/node_modules/mqtt-packet/benchmarks/generateNet.js b/mqtt-backend/node_modules/mqtt-packet/benchmarks/generateNet.js
new file mode 100644
index 0000000..43d81ac
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/benchmarks/generateNet.js
@@ -0,0 +1,50 @@
+const mqtt = require('../')
+const max = 1000000
+let i = 0
+const start = Date.now()
+let time
+const buf = Buffer.allocUnsafe(10)
+const net = require('net')
+const server = net.createServer(handle)
+let dest
+
+buf.fill('test')
+
+function handle (sock) {
+  sock.resume()
+}
+
+server.listen(0, () => {
+  dest = net.connect(server.address())
+
+  dest.on('connect', tickWait)
+  dest.on('drain', tickWait)
+  dest.on('finish', () => {
+    time = Date.now() - start
+    console.log('Total time', time)
+    console.log('Total packets', max)
+    console.log('Packet/s', max / time * 1000)
+    server.close()
+  })
+})
+
+function tickWait () {
+  // console.log('tickWait', i)
+  let res = true
+  // var toSend = new Buffer(5 + buf.length)
+
+  for (; i < max && res; i++) {
+    res = dest.write(mqtt.generate({
+      cmd: 'publish',
+      topic: 'test',
+      payload: buf
+    }))
+    // buf.copy(toSend, 5)
+    // res = dest.write(toSend, 'buffer')
+    // console.log(res)
+  }
+
+  if (i >= max) {
+    dest.end()
+  }
+}
diff --git a/mqtt-backend/node_modules/mqtt-packet/benchmarks/parse.js b/mqtt-backend/node_modules/mqtt-packet/benchmarks/parse.js
new file mode 100644
index 0000000..d43d1f0
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/benchmarks/parse.js
@@ -0,0 +1,19 @@
+const mqtt = require('../')
+const parser = mqtt.parser()
+const max = 10000000
+let i
+const start = Date.now() / 1000
+
+for (i = 0; i < max; i++) {
+  parser.parse(Buffer.from([
+    48, 10, // Header (publish)
+    0, 4, // Topic length
+    116, 101, 115, 116, // Topic (test)
+    116, 101, 115, 116 // Payload (test)
+  ]))
+}
+
+const time = Date.now() / 1000 - start
+console.log('Total packets', max)
+console.log('Total time', Math.round(time * 100) / 100)
+console.log('Packet/s', max / time)
diff --git a/mqtt-backend/node_modules/mqtt-packet/benchmarks/writeToStream.js b/mqtt-backend/node_modules/mqtt-packet/benchmarks/writeToStream.js
new file mode 100644
index 0000000..f6934ea
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/benchmarks/writeToStream.js
@@ -0,0 +1,48 @@
+const mqtt = require('../')
+const max = 1000000
+let i = 0
+const start = Date.now()
+let time
+const buf = Buffer.allocUnsafe(10)
+const net = require('net')
+const server = net.createServer(handle)
+let dest
+
+function handle (sock) {
+  sock.resume()
+}
+
+buf.fill('test')
+
+server.listen(0, () => {
+  dest = net.connect(server.address())
+
+  dest.on('connect', tickWait)
+  dest.on('drain', tickWait)
+  dest.on('finish', () => {
+    time = Date.now() - start
+    console.log('Total time', time)
+    console.log('Total packets', max)
+    console.log('Packet/s', max / time * 1000)
+    server.close()
+  })
+})
+
+function tickWait () {
+  let res = true
+  // var toSend = new Buffer(5)
+
+  for (; i < max && res; i++) {
+    res = mqtt.writeToStream({
+      cmd: 'publish',
+      topic: 'test',
+      payload: buf
+    }, dest)
+    // dest.write(toSend, 'buffer')
+    // res = dest.write(buf, 'buffer')
+  }
+
+  if (i >= max) {
+    dest.end()
+  }
+}
diff --git a/mqtt-backend/node_modules/mqtt-packet/constants.js b/mqtt-backend/node_modules/mqtt-packet/constants.js
new file mode 100644
index 0000000..6ade1a3
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/constants.js
@@ -0,0 +1,291 @@
+/* Protocol - protocol constants */
+const protocol = module.exports
+const { Buffer } = require('buffer')
+
+/* Command code => mnemonic */
+protocol.types = {
+  0: 'reserved',
+  1: 'connect',
+  2: 'connack',
+  3: 'publish',
+  4: 'puback',
+  5: 'pubrec',
+  6: 'pubrel',
+  7: 'pubcomp',
+  8: 'subscribe',
+  9: 'suback',
+  10: 'unsubscribe',
+  11: 'unsuback',
+  12: 'pingreq',
+  13: 'pingresp',
+  14: 'disconnect',
+  15: 'auth'
+}
+
+protocol.requiredHeaderFlags = {
+  1: 0, // 'connect'
+  2: 0, // 'connack'
+  4: 0, // 'puback'
+  5: 0, // 'pubrec'
+  6: 2, // 'pubrel'
+  7: 0, // 'pubcomp'
+  8: 2, // 'subscribe'
+  9: 0, // 'suback'
+  10: 2, // 'unsubscribe'
+  11: 0, // 'unsuback'
+  12: 0, // 'pingreq'
+  13: 0, // 'pingresp'
+  14: 0, // 'disconnect'
+  15: 0 // 'auth'
+}
+
+protocol.requiredHeaderFlagsErrors = {}
+for (const k in protocol.requiredHeaderFlags) {
+  const v = protocol.requiredHeaderFlags[k]
+  protocol.requiredHeaderFlagsErrors[k] = 'Invalid header flag bits, must be 0x' + v.toString(16) + ' for ' + protocol.types[k] + ' packet'
+}
+
+/* Mnemonic => Command code */
+protocol.codes = {}
+for (const k in protocol.types) {
+  const v = protocol.types[k]
+  protocol.codes[v] = k
+}
+
+/* Header */
+protocol.CMD_SHIFT = 4
+protocol.CMD_MASK = 0xF0
+protocol.DUP_MASK = 0x08
+protocol.QOS_MASK = 0x03
+protocol.QOS_SHIFT = 1
+protocol.RETAIN_MASK = 0x01
+
+/* Length */
+protocol.VARBYTEINT_MASK = 0x7F
+protocol.VARBYTEINT_FIN_MASK = 0x80
+protocol.VARBYTEINT_MAX = 268435455
+
+/* Connack */
+protocol.SESSIONPRESENT_MASK = 0x01
+protocol.SESSIONPRESENT_HEADER = Buffer.from([protocol.SESSIONPRESENT_MASK])
+protocol.CONNACK_HEADER = Buffer.from([protocol.codes.connack << protocol.CMD_SHIFT])
+
+/* Connect */
+protocol.USERNAME_MASK = 0x80
+protocol.PASSWORD_MASK = 0x40
+protocol.WILL_RETAIN_MASK = 0x20
+protocol.WILL_QOS_MASK = 0x18
+protocol.WILL_QOS_SHIFT = 3
+protocol.WILL_FLAG_MASK = 0x04
+protocol.CLEAN_SESSION_MASK = 0x02
+protocol.CONNECT_HEADER = Buffer.from([protocol.codes.connect << protocol.CMD_SHIFT])
+
+/* Properties */
+protocol.properties = {
+  sessionExpiryInterval: 17,
+  willDelayInterval: 24,
+  receiveMaximum: 33,
+  maximumPacketSize: 39,
+  topicAliasMaximum: 34,
+  requestResponseInformation: 25,
+  requestProblemInformation: 23,
+  userProperties: 38,
+  authenticationMethod: 21,
+  authenticationData: 22,
+  payloadFormatIndicator: 1,
+  messageExpiryInterval: 2,
+  contentType: 3,
+  responseTopic: 8,
+  correlationData: 9,
+  maximumQoS: 36,
+  retainAvailable: 37,
+  assignedClientIdentifier: 18,
+  reasonString: 31,
+  wildcardSubscriptionAvailable: 40,
+  subscriptionIdentifiersAvailable: 41,
+  sharedSubscriptionAvailable: 42,
+  serverKeepAlive: 19,
+  responseInformation: 26,
+  serverReference: 28,
+  topicAlias: 35,
+  subscriptionIdentifier: 11
+}
+protocol.propertiesCodes = {}
+for (const prop in protocol.properties) {
+  const id = protocol.properties[prop]
+  protocol.propertiesCodes[id] = prop
+}
+protocol.propertiesTypes = {
+  sessionExpiryInterval: 'int32',
+  willDelayInterval: 'int32',
+  receiveMaximum: 'int16',
+  maximumPacketSize: 'int32',
+  topicAliasMaximum: 'int16',
+  requestResponseInformation: 'byte',
+  requestProblemInformation: 'byte',
+  userProperties: 'pair',
+  authenticationMethod: 'string',
+  authenticationData: 'binary',
+  payloadFormatIndicator: 'byte',
+  messageExpiryInterval: 'int32',
+  contentType: 'string',
+  responseTopic: 'string',
+  correlationData: 'binary',
+  maximumQoS: 'int8',
+  retainAvailable: 'byte',
+  assignedClientIdentifier: 'string',
+  reasonString: 'string',
+  wildcardSubscriptionAvailable: 'byte',
+  subscriptionIdentifiersAvailable: 'byte',
+  sharedSubscriptionAvailable: 'byte',
+  serverKeepAlive: 'int16',
+  responseInformation: 'string',
+  serverReference: 'string',
+  topicAlias: 'int16',
+  subscriptionIdentifier: 'var'
+}
+
+function genHeader (type) {
+  return [0, 1, 2].map(qos => {
+    return [0, 1].map(dup => {
+      return [0, 1].map(retain => {
+        const buf = Buffer.alloc(1)
+        buf.writeUInt8(
+          protocol.codes[type] << protocol.CMD_SHIFT |
+          (dup ? protocol.DUP_MASK : 0) |
+          qos << protocol.QOS_SHIFT | retain, 0, true)
+        return buf
+      })
+    })
+  })
+}
+
+/* Publish */
+protocol.PUBLISH_HEADER = genHeader('publish')
+
+/* Subscribe */
+protocol.SUBSCRIBE_HEADER = genHeader('subscribe')
+protocol.SUBSCRIBE_OPTIONS_QOS_MASK = 0x03
+protocol.SUBSCRIBE_OPTIONS_NL_MASK = 0x01
+protocol.SUBSCRIBE_OPTIONS_NL_SHIFT = 2
+protocol.SUBSCRIBE_OPTIONS_RAP_MASK = 0x01
+protocol.SUBSCRIBE_OPTIONS_RAP_SHIFT = 3
+protocol.SUBSCRIBE_OPTIONS_RH_MASK = 0x03
+protocol.SUBSCRIBE_OPTIONS_RH_SHIFT = 4
+protocol.SUBSCRIBE_OPTIONS_RH = [0x00, 0x10, 0x20]
+protocol.SUBSCRIBE_OPTIONS_NL = 0x04
+protocol.SUBSCRIBE_OPTIONS_RAP = 0x08
+protocol.SUBSCRIBE_OPTIONS_QOS = [0x00, 0x01, 0x02]
+
+/* Unsubscribe */
+protocol.UNSUBSCRIBE_HEADER = genHeader('unsubscribe')
+
+/* Confirmations */
+protocol.ACKS = {
+  unsuback: genHeader('unsuback'),
+  puback: genHeader('puback'),
+  pubcomp: genHeader('pubcomp'),
+  pubrel: genHeader('pubrel'),
+  pubrec: genHeader('pubrec')
+}
+
+protocol.SUBACK_HEADER = Buffer.from([protocol.codes.suback << protocol.CMD_SHIFT])
+
+/* Protocol versions */
+protocol.VERSION3 = Buffer.from([3])
+protocol.VERSION4 = Buffer.from([4])
+protocol.VERSION5 = Buffer.from([5])
+protocol.VERSION131 = Buffer.from([131])
+protocol.VERSION132 = Buffer.from([132])
+
+/* QoS */
+protocol.QOS = [0, 1, 2].map(qos => {
+  return Buffer.from([qos])
+})
+
+/* Empty packets */
+protocol.EMPTY = {
+  pingreq: Buffer.from([protocol.codes.pingreq << 4, 0]),
+  pingresp: Buffer.from([protocol.codes.pingresp << 4, 0]),
+  disconnect: Buffer.from([protocol.codes.disconnect << 4, 0])
+}
+
+protocol.MQTT5_PUBACK_PUBREC_CODES = {
+  0x00: 'Success',
+  0x10: 'No matching subscribers',
+  0x80: 'Unspecified error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x90: 'Topic Name invalid',
+  0x91: 'Packet identifier in use',
+  0x97: 'Quota exceeded',
+  0x99: 'Payload format invalid'
+}
+
+protocol.MQTT5_PUBREL_PUBCOMP_CODES = {
+  0x00: 'Success',
+  0x92: 'Packet Identifier not found'
+}
+
+protocol.MQTT5_SUBACK_CODES = {
+  0x00: 'Granted QoS 0',
+  0x01: 'Granted QoS 1',
+  0x02: 'Granted QoS 2',
+  0x80: 'Unspecified error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x8F: 'Topic Filter invalid',
+  0x91: 'Packet Identifier in use',
+  0x97: 'Quota exceeded',
+  0x9E: 'Shared Subscriptions not supported',
+  0xA1: 'Subscription Identifiers not supported',
+  0xA2: 'Wildcard Subscriptions not supported'
+}
+
+protocol.MQTT5_UNSUBACK_CODES = {
+  0x00: 'Success',
+  0x11: 'No subscription existed',
+  0x80: 'Unspecified error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x8F: 'Topic Filter invalid',
+  0x91: 'Packet Identifier in use'
+}
+
+protocol.MQTT5_DISCONNECT_CODES = {
+  0x00: 'Normal disconnection',
+  0x04: 'Disconnect with Will Message',
+  0x80: 'Unspecified error',
+  0x81: 'Malformed Packet',
+  0x82: 'Protocol Error',
+  0x83: 'Implementation specific error',
+  0x87: 'Not authorized',
+  0x89: 'Server busy',
+  0x8B: 'Server shutting down',
+  0x8D: 'Keep Alive timeout',
+  0x8E: 'Session taken over',
+  0x8F: 'Topic Filter invalid',
+  0x90: 'Topic Name invalid',
+  0x93: 'Receive Maximum exceeded',
+  0x94: 'Topic Alias invalid',
+  0x95: 'Packet too large',
+  0x96: 'Message rate too high',
+  0x97: 'Quota exceeded',
+  0x98: 'Administrative action',
+  0x99: 'Payload format invalid',
+  0x9A: 'Retain not supported',
+  0x9B: 'QoS not supported',
+  0x9C: 'Use another server',
+  0x9D: 'Server moved',
+  0x9E: 'Shared Subscriptions not supported',
+  0x9F: 'Connection rate exceeded',
+  0xA0: 'Maximum connect time',
+  0xA1: 'Subscription Identifiers not supported',
+  0xA2: 'Wildcard Subscriptions not supported'
+}
+
+protocol.MQTT5_AUTH_CODES = {
+  0x00: 'Success',
+  0x18: 'Continue authentication',
+  0x19: 'Re-authenticate'
+}
diff --git a/mqtt-backend/node_modules/mqtt-packet/generate.js b/mqtt-backend/node_modules/mqtt-packet/generate.js
new file mode 100644
index 0000000..2abf91d
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/generate.js
@@ -0,0 +1,57 @@
+const writeToStream = require('./writeToStream')
+const { EventEmitter } = require('events')
+const { Buffer } = require('buffer')
+
+function generate (packet, opts) {
+  const stream = new Accumulator()
+  writeToStream(packet, stream, opts)
+  return stream.concat()
+}
+
+class Accumulator extends EventEmitter {
+  constructor () {
+    super()
+    this._array = new Array(20)
+    this._i = 0
+  }
+
+  write (chunk) {
+    this._array[this._i++] = chunk
+    return true
+  }
+
+  concat () {
+    let length = 0
+    const lengths = new Array(this._array.length)
+    const list = this._array
+    let pos = 0
+    let i
+
+    for (i = 0; i < list.length && list[i] !== undefined; i++) {
+      if (typeof list[i] !== 'string') lengths[i] = list[i].length
+      else lengths[i] = Buffer.byteLength(list[i])
+
+      length += lengths[i]
+    }
+
+    const result = Buffer.allocUnsafe(length)
+
+    for (i = 0; i < list.length && list[i] !== undefined; i++) {
+      if (typeof list[i] !== 'string') {
+        list[i].copy(result, pos)
+        pos += lengths[i]
+      } else {
+        result.write(list[i], pos)
+        pos += lengths[i]
+      }
+    }
+
+    return result
+  }
+
+  destroy (err) {
+    if (err) this.emit('error', err)
+  }
+}
+
+module.exports = generate
diff --git a/mqtt-backend/node_modules/mqtt-packet/mqtt.js b/mqtt-backend/node_modules/mqtt-packet/mqtt.js
new file mode 100644
index 0000000..f23c8d7
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/mqtt.js
@@ -0,0 +1,3 @@
+exports.parser = require('./parser').parser
+exports.generate = require('./generate')
+exports.writeToStream = require('./writeToStream')
diff --git a/mqtt-backend/node_modules/mqtt-packet/numbers.js b/mqtt-backend/node_modules/mqtt-packet/numbers.js
new file mode 100644
index 0000000..443321b
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/numbers.js
@@ -0,0 +1,59 @@
+const { Buffer } = require('buffer')
+const max = 65536
+const cache = {}
+
+// in node 6 Buffer.subarray returns a Uint8Array instead of a Buffer
+// later versions return a Buffer
+// alternative is Buffer.slice but that creates a new buffer
+// creating new buffers takes time
+// SubOk is only false on node < 8
+const SubOk = Buffer.isBuffer(Buffer.from([1, 2]).subarray(0, 1))
+
+function generateBuffer (i) {
+  const buffer = Buffer.allocUnsafe(2)
+  buffer.writeUInt8(i >> 8, 0)
+  buffer.writeUInt8(i & 0x00FF, 0 + 1)
+
+  return buffer
+}
+
+function generateCache () {
+  for (let i = 0; i < max; i++) {
+    cache[i] = generateBuffer(i)
+  }
+}
+
+function genBufVariableByteInt (num) {
+  const maxLength = 4 // max 4 bytes
+  let digit = 0
+  let pos = 0
+  const buffer = Buffer.allocUnsafe(maxLength)
+
+  do {
+    digit = num % 128 | 0
+    num = num / 128 | 0
+    if (num > 0) digit = digit | 0x80
+
+    buffer.writeUInt8(digit, pos++)
+  } while (num > 0 && pos < maxLength)
+
+  if (num > 0) {
+    pos = 0
+  }
+
+  return SubOk ? buffer.subarray(0, pos) : buffer.slice(0, pos)
+}
+
+function generate4ByteBuffer (num) {
+  const buffer = Buffer.allocUnsafe(4)
+  buffer.writeUInt32BE(num, 0)
+  return buffer
+}
+
+module.exports = {
+  cache,
+  generateCache,
+  generateNumber: generateBuffer,
+  genBufVariableByteInt,
+  generate4ByteBuffer
+}
diff --git a/mqtt-backend/node_modules/mqtt-packet/package.json b/mqtt-backend/node_modules/mqtt-packet/package.json
new file mode 100644
index 0000000..32dd158
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/package.json
@@ -0,0 +1,48 @@
+{
+  "name": "mqtt-packet",
+  "version": "9.0.2",
+  "description": "Parse and generate MQTT packets like a breeze",
+  "main": "mqtt.js",
+  "types": "types/index.d.ts",
+  "contributors": [
+    "Matteo Collina <matteo.collina@gmail.com> (https://github.com/mcollina)",
+    "Adam Rudd <damvrr@gmail.com>",
+    "Peter Sorowka (https://github.com/psorowka)",
+    "Wouter Klijn <contact@wuhkuh.com> (https://github.com/wuhkuh)",
+    "Siarhei Buntsevich (https://github.com/scarry1992)"
+  ],
+  "scripts": {
+    "test": "tape test.js | tap-spec && standard",
+    "ci": "tape test.js && node testRandom && standard"
+  },
+  "pre-commit": "test",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mqttjs/mqtt-packet.git"
+  },
+  "keywords": [
+    "MQTT",
+    "packet",
+    "parse",
+    "publish",
+    "subscribe",
+    "pubsub"
+  ],
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mqttjs/mqtt-packet/issues"
+  },
+  "homepage": "https://github.com/mqttjs/mqtt-packet",
+  "devDependencies": {
+    "pre-commit": "^1.2.2",
+    "readable-stream": "^4.4.2",
+    "standard": "^17.1.0",
+    "tap-spec": "^5.0.0",
+    "tape": "^5.7.2"
+  },
+  "dependencies": {
+    "bl": "^6.0.8",
+    "debug": "^4.3.4",
+    "process-nextick-args": "^2.0.1"
+  }
+}
diff --git a/mqtt-backend/node_modules/mqtt-packet/packet.js b/mqtt-backend/node_modules/mqtt-packet/packet.js
new file mode 100644
index 0000000..4ef1e78
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/packet.js
@@ -0,0 +1,13 @@
+class Packet {
+  constructor () {
+    this.cmd = null
+    this.retain = false
+    this.qos = 0
+    this.dup = false
+    this.length = -1
+    this.topic = null
+    this.payload = null
+  }
+}
+
+module.exports = Packet
diff --git a/mqtt-backend/node_modules/mqtt-packet/parser.js b/mqtt-backend/node_modules/mqtt-packet/parser.js
new file mode 100644
index 0000000..db78183
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/parser.js
@@ -0,0 +1,809 @@
+const bl = require('bl')
+const { EventEmitter } = require('events')
+const Packet = require('./packet')
+const constants = require('./constants')
+const debug = require('debug')('mqtt-packet:parser')
+
+class Parser extends EventEmitter {
+  constructor () {
+    super()
+    this.parser = this.constructor.parser
+  }
+
+  static parser (opt) {
+    if (!(this instanceof Parser)) return (new Parser()).parser(opt)
+
+    this.settings = opt || {}
+
+    this._states = [
+      '_parseHeader',
+      '_parseLength',
+      '_parsePayload',
+      '_newPacket'
+    ]
+
+    this._resetState()
+    return this
+  }
+
+  _resetState () {
+    debug('_resetState: resetting packet, error, _list, and _stateCounter')
+    this.packet = new Packet()
+    this.error = null
+    this._list = bl()
+    this._stateCounter = 0
+  }
+
+  parse (buf) {
+    if (this.error) this._resetState()
+
+    this._list.append(buf)
+    debug('parse: current state: %s', this._states[this._stateCounter])
+    while ((this.packet.length !== -1 || this._list.length > 0) &&
+      this[this._states[this._stateCounter]]() &&
+      !this.error) {
+      this._stateCounter++
+      debug('parse: state complete. _stateCounter is now: %d', this._stateCounter)
+      debug('parse: packet.length: %d, buffer list length: %d', this.packet.length, this._list.length)
+      if (this._stateCounter >= this._states.length) this._stateCounter = 0
+    }
+    debug('parse: exited while loop. packet: %d, buffer list length: %d', this.packet.length, this._list.length)
+    return this._list.length
+  }
+
+  _parseHeader () {
+    // There is at least one byte in the buffer
+    const zero = this._list.readUInt8(0)
+    const cmdIndex = zero >> constants.CMD_SHIFT
+    this.packet.cmd = constants.types[cmdIndex]
+    const headerFlags = zero & 0xf
+    const requiredHeaderFlags = constants.requiredHeaderFlags[cmdIndex]
+    if (requiredHeaderFlags != null && headerFlags !== requiredHeaderFlags) {
+      // Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+      return this._emitError(new Error(constants.requiredHeaderFlagsErrors[cmdIndex]))
+    }
+    this.packet.retain = (zero & constants.RETAIN_MASK) !== 0
+    this.packet.qos = (zero >> constants.QOS_SHIFT) & constants.QOS_MASK
+    if (this.packet.qos > 2) {
+      return this._emitError(new Error('Packet must not have both QoS bits set to 1'))
+    }
+    this.packet.dup = (zero & constants.DUP_MASK) !== 0
+    debug('_parseHeader: packet: %o', this.packet)
+
+    this._list.consume(1)
+
+    return true
+  }
+
+  _parseLength () {
+    // There is at least one byte in the list
+    const result = this._parseVarByteNum(true)
+
+    if (result) {
+      this.packet.length = result.value
+      this._list.consume(result.bytes)
+    }
+    debug('_parseLength %d', result.value)
+    return !!result
+  }
+
+  _parsePayload () {
+    debug('_parsePayload: payload %O', this._list)
+    let result = false
+
+    // Do we have a payload? Do we have enough data to complete the payload?
+    // PINGs have no payload
+    if (this.packet.length === 0 || this._list.length >= this.packet.length) {
+      this._pos = 0
+
+      switch (this.packet.cmd) {
+        case 'connect':
+          this._parseConnect()
+          break
+        case 'connack':
+          this._parseConnack()
+          break
+        case 'publish':
+          this._parsePublish()
+          break
+        case 'puback':
+        case 'pubrec':
+        case 'pubrel':
+        case 'pubcomp':
+          this._parseConfirmation()
+          break
+        case 'subscribe':
+          this._parseSubscribe()
+          break
+        case 'suback':
+          this._parseSuback()
+          break
+        case 'unsubscribe':
+          this._parseUnsubscribe()
+          break
+        case 'unsuback':
+          this._parseUnsuback()
+          break
+        case 'pingreq':
+        case 'pingresp':
+          // These are empty, nothing to do
+          break
+        case 'disconnect':
+          this._parseDisconnect()
+          break
+        case 'auth':
+          this._parseAuth()
+          break
+        default:
+          this._emitError(new Error('Not supported'))
+      }
+
+      result = true
+    }
+    debug('_parsePayload complete result: %s', result)
+    return result
+  }
+
+  _parseConnect () {
+    debug('_parseConnect')
+    let topic // Will topic
+    let payload // Will payload
+    let password // Password
+    let username // Username
+    const flags = {}
+    const packet = this.packet
+
+    // Parse protocolId
+    const protocolId = this._parseString()
+
+    if (protocolId === null) return this._emitError(new Error('Cannot parse protocolId'))
+    if (protocolId !== 'MQTT' && protocolId !== 'MQIsdp') {
+      return this._emitError(new Error('Invalid protocolId'))
+    }
+
+    packet.protocolId = protocolId
+
+    // Parse constants version number
+    if (this._pos >= this._list.length) return this._emitError(new Error('Packet too short'))
+
+    packet.protocolVersion = this._list.readUInt8(this._pos)
+
+    if (packet.protocolVersion >= 128) {
+      packet.bridgeMode = true
+      packet.protocolVersion = packet.protocolVersion - 128
+    }
+
+    if (packet.protocolVersion !== 3 && packet.protocolVersion !== 4 && packet.protocolVersion !== 5) {
+      return this._emitError(new Error('Invalid protocol version'))
+    }
+
+    this._pos++
+
+    if (this._pos >= this._list.length) {
+      return this._emitError(new Error('Packet too short'))
+    }
+
+    if (this._list.readUInt8(this._pos) & 0x1) {
+      // The Server MUST validate that the reserved flag in the CONNECT Control Packet is set to zero and disconnect the Client if it is not zero [MQTT-3.1.2-3]
+      return this._emitError(new Error('Connect flag bit 0 must be 0, but got 1'))
+    }
+    // Parse connect flags
+    flags.username = (this._list.readUInt8(this._pos) & constants.USERNAME_MASK)
+    flags.password = (this._list.readUInt8(this._pos) & constants.PASSWORD_MASK)
+    flags.will = (this._list.readUInt8(this._pos) & constants.WILL_FLAG_MASK)
+
+    const willRetain = !!(this._list.readUInt8(this._pos) & constants.WILL_RETAIN_MASK)
+    const willQos = (this._list.readUInt8(this._pos) &
+        constants.WILL_QOS_MASK) >> constants.WILL_QOS_SHIFT
+
+    if (flags.will) {
+      packet.will = {}
+      packet.will.retain = willRetain
+      packet.will.qos = willQos
+    } else {
+      if (willRetain) {
+        return this._emitError(new Error('Will Retain Flag must be set to zero when Will Flag is set to 0'))
+      }
+      if (willQos) {
+        return this._emitError(new Error('Will QoS must be set to zero when Will Flag is set to 0'))
+      }
+    }
+
+    packet.clean = (this._list.readUInt8(this._pos) & constants.CLEAN_SESSION_MASK) !== 0
+    this._pos++
+
+    // Parse keepalive
+    packet.keepalive = this._parseNum()
+    if (packet.keepalive === -1) return this._emitError(new Error('Packet too short'))
+
+    // parse properties
+    if (packet.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+    // Parse clientId
+    const clientId = this._parseString()
+    if (clientId === null) return this._emitError(new Error('Packet too short'))
+    packet.clientId = clientId
+    debug('_parseConnect: packet.clientId: %s', packet.clientId)
+
+    if (flags.will) {
+      if (packet.protocolVersion === 5) {
+        const willProperties = this._parseProperties()
+        if (Object.getOwnPropertyNames(willProperties).length) {
+          packet.will.properties = willProperties
+        }
+      }
+      // Parse will topic
+      topic = this._parseString()
+      if (topic === null) return this._emitError(new Error('Cannot parse will topic'))
+      packet.will.topic = topic
+      debug('_parseConnect: packet.will.topic: %s', packet.will.topic)
+
+      // Parse will payload
+      payload = this._parseBuffer()
+      if (payload === null) return this._emitError(new Error('Cannot parse will payload'))
+      packet.will.payload = payload
+      debug('_parseConnect: packet.will.paylaod: %s', packet.will.payload)
+    }
+
+    // Parse username
+    if (flags.username) {
+      username = this._parseString()
+      if (username === null) return this._emitError(new Error('Cannot parse username'))
+      packet.username = username
+      debug('_parseConnect: packet.username: %s', packet.username)
+    }
+
+    // Parse password
+    if (flags.password) {
+      password = this._parseBuffer()
+      if (password === null) return this._emitError(new Error('Cannot parse password'))
+      packet.password = password
+    }
+    // need for right parse auth packet and self set up
+    this.settings = packet
+    debug('_parseConnect: complete')
+    return packet
+  }
+
+  _parseConnack () {
+    debug('_parseConnack')
+    const packet = this.packet
+
+    if (this._list.length < 1) return null
+    const flags = this._list.readUInt8(this._pos++)
+    if (flags > 1) {
+      return this._emitError(new Error('Invalid connack flags, bits 7-1 must be set to 0'))
+    }
+    packet.sessionPresent = !!(flags & constants.SESSIONPRESENT_MASK)
+
+    if (this.settings.protocolVersion === 5) {
+      if (this._list.length >= 2) {
+        packet.reasonCode = this._list.readUInt8(this._pos++)
+      } else {
+        packet.reasonCode = 0
+      }
+    } else {
+      if (this._list.length < 2) return null
+      packet.returnCode = this._list.readUInt8(this._pos++)
+    }
+
+    if (packet.returnCode === -1 || packet.reasonCode === -1) return this._emitError(new Error('Cannot parse return code'))
+    // mqtt 5 properties
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+    debug('_parseConnack: complete')
+  }
+
+  _parsePublish () {
+    debug('_parsePublish')
+    const packet = this.packet
+    packet.topic = this._parseString()
+
+    if (packet.topic === null) return this._emitError(new Error('Cannot parse topic'))
+
+    // Parse messageId
+    if (packet.qos > 0) if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    packet.payload = this._list.slice(this._pos, packet.length)
+    debug('_parsePublish: payload from buffer list: %o', packet.payload)
+  }
+
+  _parseSubscribe () {
+    debug('_parseSubscribe')
+    const packet = this.packet
+    let topic
+    let options
+    let qos
+    let rh
+    let rap
+    let nl
+    let subscription
+
+    packet.subscriptions = []
+
+    if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed subscribe, no payload specified')) }
+
+    while (this._pos < packet.length) {
+      // Parse topic
+      topic = this._parseString()
+      if (topic === null) return this._emitError(new Error('Cannot parse topic'))
+      if (this._pos >= packet.length) return this._emitError(new Error('Malformed Subscribe Payload'))
+
+      options = this._parseByte()
+
+      if (this.settings.protocolVersion === 5) {
+        if (options & 0xc0) {
+          return this._emitError(new Error('Invalid subscribe topic flag bits, bits 7-6 must be 0'))
+        }
+      } else {
+        if (options & 0xfc) {
+          return this._emitError(new Error('Invalid subscribe topic flag bits, bits 7-2 must be 0'))
+        }
+      }
+
+      qos = options & constants.SUBSCRIBE_OPTIONS_QOS_MASK
+      if (qos > 2) {
+        return this._emitError(new Error('Invalid subscribe QoS, must be <= 2'))
+      }
+      nl = ((options >> constants.SUBSCRIBE_OPTIONS_NL_SHIFT) & constants.SUBSCRIBE_OPTIONS_NL_MASK) !== 0
+      rap = ((options >> constants.SUBSCRIBE_OPTIONS_RAP_SHIFT) & constants.SUBSCRIBE_OPTIONS_RAP_MASK) !== 0
+      rh = (options >> constants.SUBSCRIBE_OPTIONS_RH_SHIFT) & constants.SUBSCRIBE_OPTIONS_RH_MASK
+
+      if (rh > 2) {
+        return this._emitError(new Error('Invalid retain handling, must be <= 2'))
+      }
+
+      subscription = { topic, qos }
+
+      // mqtt 5 options
+      if (this.settings.protocolVersion === 5) {
+        subscription.nl = nl
+        subscription.rap = rap
+        subscription.rh = rh
+      } else if (this.settings.bridgeMode) {
+        subscription.rh = 0
+        subscription.rap = true
+        subscription.nl = true
+      }
+
+      // Push pair to subscriptions
+      debug('_parseSubscribe: push subscription `%s` to subscription', subscription)
+      packet.subscriptions.push(subscription)
+    }
+  }
+
+  _parseSuback () {
+    debug('_parseSuback')
+    const packet = this.packet
+    this.packet.granted = []
+
+    if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed suback, no payload specified')) }
+
+    // Parse granted QoSes
+    while (this._pos < this.packet.length) {
+      const code = this._list.readUInt8(this._pos++)
+      if (this.settings.protocolVersion === 5) {
+        if (!constants.MQTT5_SUBACK_CODES[code]) {
+          return this._emitError(new Error('Invalid suback code'))
+        }
+      } else {
+        if (code > 2 && code !== 0x80) {
+          return this._emitError(new Error('Invalid suback QoS, must be 0, 1, 2 or 128'))
+        }
+      }
+      this.packet.granted.push(code)
+    }
+  }
+
+  _parseUnsubscribe () {
+    debug('_parseUnsubscribe')
+    const packet = this.packet
+
+    packet.unsubscriptions = []
+
+    // Parse messageId
+    if (!this._parseMessageId()) { return }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed unsubscribe, no payload specified')) }
+
+    while (this._pos < packet.length) {
+      // Parse topic
+      const topic = this._parseString()
+      if (topic === null) return this._emitError(new Error('Cannot parse topic'))
+
+      // Push topic to unsubscriptions
+      debug('_parseUnsubscribe: push topic `%s` to unsubscriptions', topic)
+      packet.unsubscriptions.push(topic)
+    }
+  }
+
+  _parseUnsuback () {
+    debug('_parseUnsuback')
+    const packet = this.packet
+    if (!this._parseMessageId()) return this._emitError(new Error('Cannot parse messageId'))
+
+    if ((this.settings.protocolVersion === 3 ||
+      this.settings.protocolVersion === 4) && packet.length !== 2) {
+      return this._emitError(new Error('Malformed unsuback, payload length must be 2'))
+    }
+    if (packet.length <= 0) { return this._emitError(new Error('Malformed unsuback, no payload specified')) }
+
+    // Properties mqtt 5
+    if (this.settings.protocolVersion === 5) {
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+      // Parse granted QoSes
+      packet.granted = []
+
+      while (this._pos < this.packet.length) {
+        const code = this._list.readUInt8(this._pos++)
+        if (!constants.MQTT5_UNSUBACK_CODES[code]) {
+          return this._emitError(new Error('Invalid unsuback code'))
+        }
+        this.packet.granted.push(code)
+      }
+    }
+  }
+
+  // parse packets like puback, pubrec, pubrel, pubcomp
+  _parseConfirmation () {
+    debug('_parseConfirmation: packet.cmd: `%s`', this.packet.cmd)
+    const packet = this.packet
+
+    this._parseMessageId()
+
+    if (this.settings.protocolVersion === 5) {
+      if (packet.length > 2) {
+        // response code
+        packet.reasonCode = this._parseByte()
+        switch (this.packet.cmd) {
+          case 'puback':
+          case 'pubrec':
+            if (!constants.MQTT5_PUBACK_PUBREC_CODES[packet.reasonCode]) {
+              return this._emitError(new Error('Invalid ' + this.packet.cmd + ' reason code'))
+            }
+            break
+          case 'pubrel':
+          case 'pubcomp':
+            if (!constants.MQTT5_PUBREL_PUBCOMP_CODES[packet.reasonCode]) {
+              return this._emitError(new Error('Invalid ' + this.packet.cmd + ' reason code'))
+            }
+            break
+        }
+        debug('_parseConfirmation: packet.reasonCode `%d`', packet.reasonCode)
+      } else {
+        packet.reasonCode = 0
+      }
+
+      if (packet.length > 3) {
+        // properies mqtt 5
+        const properties = this._parseProperties()
+        if (Object.getOwnPropertyNames(properties).length) {
+          packet.properties = properties
+        }
+      }
+    }
+
+    return true
+  }
+
+  // parse disconnect packet
+  _parseDisconnect () {
+    const packet = this.packet
+    debug('_parseDisconnect')
+
+    if (this.settings.protocolVersion === 5) {
+      // response code
+      if (this._list.length > 0) {
+        packet.reasonCode = this._parseByte()
+        if (!constants.MQTT5_DISCONNECT_CODES[packet.reasonCode]) {
+          this._emitError(new Error('Invalid disconnect reason code'))
+        }
+      } else {
+        packet.reasonCode = 0
+      }
+      // properies mqtt 5
+      const properties = this._parseProperties()
+      if (Object.getOwnPropertyNames(properties).length) {
+        packet.properties = properties
+      }
+    }
+
+    debug('_parseDisconnect result: true')
+    return true
+  }
+
+  // parse auth packet
+  _parseAuth () {
+    debug('_parseAuth')
+    const packet = this.packet
+
+    if (this.settings.protocolVersion !== 5) {
+      return this._emitError(new Error('Not supported auth packet for this version MQTT'))
+    }
+
+    // response code
+    packet.reasonCode = this._parseByte()
+    if (!constants.MQTT5_AUTH_CODES[packet.reasonCode]) {
+      return this._emitError(new Error('Invalid auth reason code'))
+    }
+    // properies mqtt 5
+    const properties = this._parseProperties()
+    if (Object.getOwnPropertyNames(properties).length) {
+      packet.properties = properties
+    }
+
+    debug('_parseAuth: result: true')
+    return true
+  }
+
+  _parseMessageId () {
+    const packet = this.packet
+
+    packet.messageId = this._parseNum()
+
+    if (packet.messageId === null) {
+      this._emitError(new Error('Cannot parse messageId'))
+      return false
+    }
+
+    debug('_parseMessageId: packet.messageId %d', packet.messageId)
+    return true
+  }
+
+  _parseString (maybeBuffer) {
+    const length = this._parseNum()
+    const end = length + this._pos
+
+    if (length === -1 || end > this._list.length || end > this.packet.length) return null
+
+    const result = this._list.toString('utf8', this._pos, end)
+    this._pos += length
+    debug('_parseString: result: %s', result)
+    return result
+  }
+
+  _parseStringPair () {
+    debug('_parseStringPair')
+    return {
+      name: this._parseString(),
+      value: this._parseString()
+    }
+  }
+
+  _parseBuffer () {
+    const length = this._parseNum()
+    const end = length + this._pos
+
+    if (length === -1 || end > this._list.length || end > this.packet.length) return null
+
+    const result = this._list.slice(this._pos, end)
+
+    this._pos += length
+    debug('_parseBuffer: result: %o', result)
+    return result
+  }
+
+  _parseNum () {
+    if (this._list.length - this._pos < 2) return -1
+
+    const result = this._list.readUInt16BE(this._pos)
+    this._pos += 2
+    debug('_parseNum: result: %s', result)
+    return result
+  }
+
+  _parse4ByteNum () {
+    if (this._list.length - this._pos < 4) return -1
+
+    const result = this._list.readUInt32BE(this._pos)
+    this._pos += 4
+    debug('_parse4ByteNum: result: %s', result)
+    return result
+  }
+
+  _parseVarByteNum (fullInfoFlag) {
+    debug('_parseVarByteNum')
+    const maxBytes = 4
+    let bytes = 0
+    let mul = 1
+    let value = 0
+    let result = false
+    let current
+    const padding = this._pos ? this._pos : 0
+
+    while (bytes < maxBytes && (padding + bytes) < this._list.length) {
+      current = this._list.readUInt8(padding + bytes++)
+      value += mul * (current & constants.VARBYTEINT_MASK)
+      mul *= 0x80
+
+      if ((current & constants.VARBYTEINT_FIN_MASK) === 0) {
+        result = true
+        break
+      }
+      if (this._list.length <= bytes) {
+        break
+      }
+    }
+
+    if (!result && bytes === maxBytes && this._list.length >= bytes) {
+      this._emitError(new Error('Invalid variable byte integer'))
+    }
+
+    if (padding) {
+      this._pos += bytes
+    }
+
+    if (result) {
+      if (fullInfoFlag) {
+        result = { bytes, value }
+      } else {
+        result = value
+      }
+    } else {
+      result = false
+    }
+
+    debug('_parseVarByteNum: result: %o', result)
+    return result
+  }
+
+  _parseByte () {
+    let result
+    if (this._pos < this._list.length) {
+      result = this._list.readUInt8(this._pos)
+      this._pos++
+    }
+    debug('_parseByte: result: %o', result)
+    return result
+  }
+
+  _parseByType (type) {
+    debug('_parseByType: type: %s', type)
+    switch (type) {
+      case 'byte': {
+        return this._parseByte() !== 0
+      }
+      case 'int8': {
+        return this._parseByte()
+      }
+      case 'int16': {
+        return this._parseNum()
+      }
+      case 'int32': {
+        return this._parse4ByteNum()
+      }
+      case 'var': {
+        return this._parseVarByteNum()
+      }
+      case 'string': {
+        return this._parseString()
+      }
+      case 'pair': {
+        return this._parseStringPair()
+      }
+      case 'binary': {
+        return this._parseBuffer()
+      }
+    }
+  }
+
+  _parseProperties () {
+    debug('_parseProperties')
+    const length = this._parseVarByteNum()
+    const start = this._pos
+    const end = start + length
+    const result = {}
+    while (this._pos < end) {
+      const type = this._parseByte()
+      if (!type) {
+        this._emitError(new Error('Cannot parse property code type'))
+        return false
+      }
+      const name = constants.propertiesCodes[type]
+      if (!name) {
+        this._emitError(new Error('Unknown property'))
+        return false
+      }
+      // user properties process
+      if (name === 'userProperties') {
+        if (!result[name]) {
+          result[name] = Object.create(null)
+        }
+        const currentUserProperty = this._parseByType(constants.propertiesTypes[name])
+        if (result[name][currentUserProperty.name]) {
+          if (Array.isArray(result[name][currentUserProperty.name])) {
+            result[name][currentUserProperty.name].push(currentUserProperty.value)
+          } else {
+            const currentValue = result[name][currentUserProperty.name]
+            result[name][currentUserProperty.name] = [currentValue]
+            result[name][currentUserProperty.name].push(currentUserProperty.value)
+          }
+        } else {
+          result[name][currentUserProperty.name] = currentUserProperty.value
+        }
+        continue
+      }
+      if (result[name]) {
+        if (Array.isArray(result[name])) {
+          result[name].push(this._parseByType(constants.propertiesTypes[name]))
+        } else {
+          result[name] = [result[name]]
+          result[name].push(this._parseByType(constants.propertiesTypes[name]))
+        }
+      } else {
+        result[name] = this._parseByType(constants.propertiesTypes[name])
+      }
+    }
+    return result
+  }
+
+  _newPacket () {
+    debug('_newPacket')
+    if (this.packet) {
+      this._list.consume(this.packet.length)
+      debug('_newPacket: parser emit packet: packet.cmd: %s, packet.payload: %s, packet.length: %d', this.packet.cmd, this.packet.payload, this.packet.length)
+      this.emit('packet', this.packet)
+    }
+    debug('_newPacket: new packet')
+    this.packet = new Packet()
+
+    this._pos = 0
+
+    return true
+  }
+
+  _emitError (err) {
+    debug('_emitError', err)
+    this.error = err
+    this.emit('error', err)
+  }
+}
+
+module.exports = Parser
diff --git a/mqtt-backend/node_modules/mqtt-packet/test.js b/mqtt-backend/node_modules/mqtt-packet/test.js
new file mode 100644
index 0000000..740886a
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/test.js
@@ -0,0 +1,3234 @@
+const util = require('util')
+
+const test = require('tape')
+const mqtt = require('./')
+const WS = require('readable-stream').Writable
+
+function normalExpectedObject (object) {
+  if (object.username != null) object.username = object.username.toString()
+  if (object.password != null) object.password = Buffer.from(object.password)
+  return object
+}
+
+function testParseGenerate (name, object, buffer, opts) {
+  test(`${name} parse`, t => {
+    t.plan(2)
+
+    const parser = mqtt.parser(opts)
+    const expected = object
+    const fixture = buffer
+
+    parser.on('packet', packet => {
+      if (packet.cmd !== 'publish') {
+        delete packet.topic
+        delete packet.payload
+      }
+      t.deepLooseEqual(packet, normalExpectedObject(expected), 'expected packet')
+    })
+
+    parser.on('error', err => {
+      t.fail(err)
+    })
+
+    t.equal(parser.parse(fixture), 0, 'remaining bytes')
+  })
+
+  test(`${name} generate`, t => {
+    // For really large buffers, the expanded hex string can be so long as to
+    // generate an error in nodejs 14.x, so only do the test with extra output
+    // for relatively small buffers.
+    const bigLength = 10000
+    const generatedBuffer = mqtt.generate(object, opts)
+    if (generatedBuffer.length < bigLength && buffer.length < bigLength) {
+      t.equal(generatedBuffer.toString('hex'), buffer.toString('hex'))
+    } else {
+      const bufferOkay = generatedBuffer.equals(buffer)
+      if (bufferOkay) {
+        t.pass()
+      } else {
+        // Output abbreviated representations of the buffers.
+        t.comment('Expected:\n' + util.inspect(buffer))
+        t.comment('Got:\n' + util.inspect(generatedBuffer))
+        t.fail('Large buffers not equal')
+      }
+    }
+    t.end()
+  })
+
+  test(`${name} mirror`, t => {
+    t.plan(2)
+
+    const parser = mqtt.parser(opts)
+    const expected = object
+    const fixture = mqtt.generate(object, opts)
+
+    parser.on('packet', packet => {
+      if (packet.cmd !== 'publish') {
+        delete packet.topic
+        delete packet.payload
+      }
+      t.deepLooseEqual(packet, normalExpectedObject(expected), 'expected packet')
+    })
+
+    parser.on('error', err => {
+      t.fail(err)
+    })
+
+    t.equal(parser.parse(fixture), 0, 'remaining bytes')
+  })
+
+  test(`${name} writeToStream`, t => {
+    const stream = WS()
+    stream.write = () => true
+    stream.on('error', (err) => t.fail(err))
+
+    const result = mqtt.writeToStream(object, stream, opts)
+    t.equal(result, true, 'should return true')
+    t.end()
+  })
+}
+
+// the API allows to pass strings as buffers to writeToStream and generate
+// parsing them back will result in a string so only generate and compare to buffer
+function testGenerateOnly (name, object, buffer, opts) {
+  test(name, t => {
+    t.equal(mqtt.generate(object, opts).toString('hex'), buffer.toString('hex'))
+    t.end()
+  })
+}
+
+function testParseOnly (name, object, buffer, opts) {
+  test(name, t => {
+    const parser = mqtt.parser(opts)
+    // const expected = object
+    // const fixture = buffer
+
+    t.plan(2 + Object.keys(object).length)
+
+    parser.on('packet', packet => {
+      t.equal(Object.keys(object).length, Object.keys(packet).length, 'key count')
+      Object.keys(object).forEach(key => {
+        t.deepEqual(packet[key], object[key], `expected packet property ${key}`)
+      })
+    })
+
+    t.equal(parser.parse(buffer), 0, 'remaining bytes')
+    t.end()
+  })
+}
+
+function testParseError (expected, fixture, opts) {
+  test(expected, t => {
+    t.plan(1)
+
+    const parser = mqtt.parser(opts)
+
+    parser.on('error', err => {
+      t.equal(err.message, expected, 'expected error message')
+    })
+
+    parser.on('packet', () => {
+      t.fail('parse errors should not be followed by packet events')
+    })
+
+    parser.parse(fixture)
+    t.end()
+  })
+}
+
+function testGenerateError (expected, fixture, opts, name) {
+  test(name || expected, t => {
+    t.plan(1)
+
+    try {
+      mqtt.generate(fixture, opts)
+    } catch (err) {
+      t.equal(expected, err.message)
+    }
+    t.end()
+  })
+}
+
+function testGenerateErrorMultipleCmds (cmds, expected, fixture, opts) {
+  cmds.forEach(cmd => {
+    const obj = Object.assign({}, fixture)
+    obj.cmd = cmd
+    testGenerateError(expected, obj, opts, `${expected} on ${cmd}`)
+  }
+  )
+}
+
+function testParseGenerateDefaults (name, object, buffer, generated, opts) {
+  testParseOnly(`${name} parse`, generated, buffer, opts)
+  testGenerateOnly(`${name} generate`, object, buffer, opts)
+}
+
+function testParseAndGenerate (name, object, buffer, opts) {
+  testParseOnly(`${name} parse`, object, buffer, opts)
+  testGenerateOnly(`${name} generate`, object, buffer, opts)
+}
+
+function testWriteToStreamError (expected, fixture) {
+  test(`writeToStream ${expected} error`, t => {
+    t.plan(2)
+
+    const stream = WS()
+
+    stream.write = () => t.fail('should not have called write')
+    stream.on('error', () => t.pass('error emitted'))
+
+    const result = mqtt.writeToStream(fixture, stream)
+
+    t.false(result, 'result should be false')
+  })
+}
+
+test('cacheNumbers get/set/unset', t => {
+  t.true(mqtt.writeToStream.cacheNumbers, 'initial state of cacheNumbers is enabled')
+  mqtt.writeToStream.cacheNumbers = false
+  t.false(mqtt.writeToStream.cacheNumbers, 'cacheNumbers can be disabled')
+  mqtt.writeToStream.cacheNumbers = true
+  t.true(mqtt.writeToStream.cacheNumbers, 'cacheNumbers can be enabled')
+  t.end()
+})
+
+test('disabled numbers cache', t => {
+  const stream = WS()
+  const message = {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 10,
+    topic: Buffer.from('test'),
+    payload: Buffer.from('test')
+  }
+  const expected = Buffer.from([
+    48, 10, // Header
+    0, 4, // Topic length
+    116, 101, 115, 116, // Topic (test)
+    116, 101, 115, 116 // Payload (test)
+  ])
+  let written = Buffer.alloc(0)
+
+  stream.write = (chunk) => {
+    written = Buffer.concat([written, chunk])
+  }
+  mqtt.writeToStream.cacheNumbers = false
+
+  mqtt.writeToStream(message, stream)
+
+  t.deepEqual(written, expected, 'written buffer is expected')
+
+  mqtt.writeToStream.cacheNumbers = true
+
+  stream.end()
+  t.end()
+})
+
+testGenerateError('Unknown command', {})
+
+testParseError('Not supported', Buffer.from([0, 1, 0]), {})
+
+// Length header field
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 255]
+), {})
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 128]
+), {})
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 255, 1]
+), {})
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 255, 127]
+), {})
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 255, 128]
+), {})
+testParseError('Invalid variable byte integer', Buffer.from(
+  [16, 255, 255, 255, 255, 255, 1]
+), {})
+
+testParseGenerate('minimal connect', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 18,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: false,
+  keepalive: 30,
+  clientId: 'test'
+}, Buffer.from([
+  16, 18, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  0, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+testGenerateOnly('minimal connect with clientId as Buffer', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 18,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: false,
+  keepalive: 30,
+  clientId: Buffer.from('test')
+}, Buffer.from([
+  16, 18, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  0, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+testParseGenerate('connect MQTT bridge 131', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 18,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  bridgeMode: true,
+  clean: false,
+  keepalive: 30,
+  clientId: 'test'
+}, Buffer.from([
+  16, 18, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  131, // Protocol version
+  0, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+testParseGenerate('connect MQTT bridge 132', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 18,
+  protocolId: 'MQIsdp',
+  protocolVersion: 4,
+  bridgeMode: true,
+  clean: false,
+  keepalive: 30,
+  clientId: 'test'
+}, Buffer.from([
+  16, 18, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  132, // Protocol version
+  0, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+testParseGenerate('connect MQTT 5', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 125,
+  protocolId: 'MQTT',
+  protocolVersion: 5,
+  will: {
+    retain: true,
+    qos: 2,
+    properties: {
+      willDelayInterval: 1234,
+      payloadFormatIndicator: false,
+      messageExpiryInterval: 4321,
+      contentType: 'test',
+      responseTopic: 'topic',
+      correlationData: Buffer.from([1, 2, 3, 4]),
+      userProperties: {
+        test: 'test'
+      }
+    },
+    topic: 'topic',
+    payload: Buffer.from([4, 3, 2, 1])
+  },
+  clean: true,
+  keepalive: 30,
+  properties: {
+    sessionExpiryInterval: 1234,
+    receiveMaximum: 432,
+    maximumPacketSize: 100,
+    topicAliasMaximum: 456,
+    requestResponseInformation: true,
+    requestProblemInformation: true,
+    userProperties: {
+      test: 'test'
+    },
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([1, 2, 3, 4])
+  },
+  clientId: 'test'
+}, Buffer.from([
+  16, 125, // Header
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // Protocol ID
+  5, // Protocol version
+  54, // Connect flags
+  0, 30, // Keepalive
+  47, // properties length
+  17, 0, 0, 4, 210, // sessionExpiryInterval
+  33, 1, 176, // receiveMaximum
+  39, 0, 0, 0, 100, // maximumPacketSize
+  34, 1, 200, // topicAliasMaximum
+  25, 1, // requestResponseInformation
+  23, 1, // requestProblemInformation,
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties,
+  21, 0, 4, 116, 101, 115, 116, // authenticationMethod
+  22, 0, 4, 1, 2, 3, 4, // authenticationData
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  47, // will properties
+  24, 0, 0, 4, 210, // will delay interval
+  1, 0, // payload format indicator
+  2, 0, 0, 16, 225, // message expiry interval
+  3, 0, 4, 116, 101, 115, 116, // content type
+  8, 0, 5, 116, 111, 112, 105, 99, // response topic
+  9, 0, 4, 1, 2, 3, 4, // corelation data
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // user properties
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 4, // Will payload length
+  4, 3, 2, 1// Will payload
+]))
+
+testParseGenerate('connect MQTT 5 with will properties but with empty will payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 121,
+  protocolId: 'MQTT',
+  protocolVersion: 5,
+  will: {
+    retain: true,
+    qos: 2,
+    properties: {
+      willDelayInterval: 1234,
+      payloadFormatIndicator: false,
+      messageExpiryInterval: 4321,
+      contentType: 'test',
+      responseTopic: 'topic',
+      correlationData: Buffer.from([1, 2, 3, 4]),
+      userProperties: {
+        test: 'test'
+      }
+    },
+    topic: 'topic',
+    payload: Buffer.from([])
+  },
+  clean: true,
+  keepalive: 30,
+  properties: {
+    sessionExpiryInterval: 1234,
+    receiveMaximum: 432,
+    maximumPacketSize: 100,
+    topicAliasMaximum: 456,
+    requestResponseInformation: true,
+    requestProblemInformation: true,
+    userProperties: {
+      test: 'test'
+    },
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([1, 2, 3, 4])
+  },
+  clientId: 'test'
+}, Buffer.from([
+  16, 121, // Header
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // Protocol ID
+  5, // Protocol version
+  54, // Connect flags
+  0, 30, // Keepalive
+  47, // properties length
+  17, 0, 0, 4, 210, // sessionExpiryInterval
+  33, 1, 176, // receiveMaximum
+  39, 0, 0, 0, 100, // maximumPacketSize
+  34, 1, 200, // topicAliasMaximum
+  25, 1, // requestResponseInformation
+  23, 1, // requestProblemInformation,
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties,
+  21, 0, 4, 116, 101, 115, 116, // authenticationMethod
+  22, 0, 4, 1, 2, 3, 4, // authenticationData
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  47, // will properties
+  24, 0, 0, 4, 210, // will delay interval
+  1, 0, // payload format indicator
+  2, 0, 0, 16, 225, // message expiry interval
+  3, 0, 4, 116, 101, 115, 116, // content type
+  8, 0, 5, 116, 111, 112, 105, 99, // response topic
+  9, 0, 4, 1, 2, 3, 4, // corelation data
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // user properties
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 0 // Will payload length
+]))
+
+testParseGenerate('connect MQTT 5 w/o will properties', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 78,
+  protocolId: 'MQTT',
+  protocolVersion: 5,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: Buffer.from([4, 3, 2, 1])
+  },
+  clean: true,
+  keepalive: 30,
+  properties: {
+    sessionExpiryInterval: 1234,
+    receiveMaximum: 432,
+    maximumPacketSize: 100,
+    topicAliasMaximum: 456,
+    requestResponseInformation: true,
+    requestProblemInformation: true,
+    userProperties: {
+      test: 'test'
+    },
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([1, 2, 3, 4])
+  },
+  clientId: 'test'
+}, Buffer.from([
+  16, 78, // Header
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // Protocol ID
+  5, // Protocol version
+  54, // Connect flags
+  0, 30, // Keepalive
+  47, // properties length
+  17, 0, 0, 4, 210, // sessionExpiryInterval
+  33, 1, 176, // receiveMaximum
+  39, 0, 0, 0, 100, // maximumPacketSize
+  34, 1, 200, // topicAliasMaximum
+  25, 1, // requestResponseInformation
+  23, 1, // requestProblemInformation,
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties,
+  21, 0, 4, 116, 101, 115, 116, // authenticationMethod
+  22, 0, 4, 1, 2, 3, 4, // authenticationData
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, // will properties
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 4, // Will payload length
+  4, 3, 2, 1// Will payload
+]))
+
+testParseGenerate('no clientId with 3.1.1', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 12,
+  protocolId: 'MQTT',
+  protocolVersion: 4,
+  clean: true,
+  keepalive: 30,
+  clientId: ''
+}, Buffer.from([
+  16, 12, // Header
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // Protocol ID
+  4, // Protocol version
+  2, // Connect flags
+  0, 30, // Keepalive
+  0, 0 // Client ID length
+]))
+
+testParseGenerateDefaults('no clientId with 5.0', {
+  cmd: 'connect',
+  protocolId: 'MQTT',
+  protocolVersion: 5,
+  clean: true,
+  keepalive: 60,
+  properties:
+  {
+    receiveMaximum: 20
+  },
+  clientId: ''
+}, Buffer.from(
+  [16, 16, 0, 4, 77, 81, 84, 84, 5, 2, 0, 60, 3, 33, 0, 20, 0, 0]
+), {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 16,
+  topic: null,
+  payload: null,
+  protocolId: 'MQTT',
+  protocolVersion: 5,
+  clean: true,
+  keepalive: 60,
+  properties: {
+    receiveMaximum: 20
+  },
+  clientId: ''
+}, { protocolVersion: 5 })
+
+testParseGenerateDefaults('utf-8 clientId with 5.0', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 23,
+  protocolId: 'MQTT',
+  protocolVersion: 4,
+  clean: true,
+  keepalive: 30,
+  clientId: 'Ŧėśt🜄'
+}, Buffer.from([
+  16, 23, // Header
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // Protocol ID
+  4, // Protocol version
+  2, // Connect flags
+  0, 30, // Keepalive
+  0, 11, // Client ID length
+  197, 166, // Ŧ (UTF-8: 0xc5a6)
+  196, 151, // ė (UTF-8: 0xc497)
+  197, 155, // ś (utf-8: 0xc59b)
+  116, // t (utf-8: 0x74)
+  240, 159, 156, 132 // 🜄 (utf-8: 0xf09f9c84)
+]), {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 23,
+  topic: null,
+  payload: null,
+  protocolId: 'MQTT',
+  protocolVersion: 4,
+  clean: true,
+  keepalive: 30,
+  clientId: 'Ŧėśt🜄'
+}, { protocol: 5 })
+
+testParseGenerateDefaults('default connect', {
+  cmd: 'connect',
+  clientId: 'test'
+}, Buffer.from([
+  16, 16, 0, 4, 77, 81, 84,
+  84, 4, 2, 0, 0,
+  0, 4, 116, 101, 115, 116
+]), {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 16,
+  topic: null,
+  payload: null,
+  protocolId: 'MQTT',
+  protocolVersion: 4,
+  clean: true,
+  keepalive: 0,
+  clientId: 'test'
+})
+
+testParseAndGenerate('Version 4 CONACK', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  topic: null,
+  payload: null,
+  sessionPresent: false,
+  returnCode: 1
+}, Buffer.from([
+  32, 2, // Fixed Header (CONNACK, Remaining Length)
+  0, 1 // Variable Header (Session not present, Connection Refused - unacceptable protocol version)
+]), {}) // Default protocolVersion (4)
+
+testParseAndGenerate('Version 5 CONACK', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 3,
+  topic: null,
+  payload: null,
+  sessionPresent: false,
+  reasonCode: 140
+}, Buffer.from([
+  32, 3, // Fixed Header (CONNACK, Remaining Length)
+  0, 140, // Variable Header (Session not present, Bad authentication method)
+  0 // Property Length Zero
+]), { protocolVersion: 5 })
+
+testParseOnly('Version 4 CONACK in Version 5 mode', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  topic: null,
+  payload: null,
+  sessionPresent: false,
+  reasonCode: 1 // a version 4 return code stored in the version 5 reasonCode because this client is in version 5
+}, Buffer.from([
+  32, 2, // Fixed Header (CONNACK, Remaining Length)
+  0, 1 // Variable Header (Session not present, Connection Refused - unacceptable protocol version)
+]), { protocolVersion: 5 }) // message is in version 4 format, but this client is in version 5 mode
+
+testParseOnly('Version 5 PUBACK test 1', {
+  cmd: 'puback',
+  messageId: 42,
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  64, 2, // Fixed Header (PUBACK, Remaining Length)
+  0, 42 // Variable Header (2 Bytes: Packet Identifier 42, Implied Reason code: Success, Implied no properties)
+]), { protocolVersion: 5 }
+)
+
+testParseAndGenerate('Version 5 PUBACK test 2', {
+  cmd: 'puback',
+  messageId: 42,
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  64, 2, // Fixed Header (PUBACK, Remaining Length)
+  0, 42 // Variable Header (2 Bytes: Packet Identifier 42, Implied reason code: 0 Success, Implied no properties)
+]), { protocolVersion: 5 }
+)
+
+testParseOnly('Version 5 PUBACK test 2.1', {
+  cmd: 'puback',
+  messageId: 42,
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 3,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  64, 3, // Fixed Header (PUBACK, Remaining Length)
+  0, 42, 0 // Variable Header (2 Bytes: Packet Identifier 42, Reason code: 0 Success, Implied no properties)
+]), { protocolVersion: 5 }
+)
+
+testParseOnly('Version 5 PUBACK test 3', {
+  cmd: 'puback',
+  messageId: 42,
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 4,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  64, 4, // Fixed Header (PUBACK, Remaining Length)
+  0, 42, 0, // Variable Header (2 Bytes: Packet Identifier 42, Reason code: 0 Success)
+  0 // no properties
+]), { protocolVersion: 5 }
+)
+
+testParseOnly('Version 5 CONNACK test 1', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 1,
+  topic: null,
+  payload: null,
+  sessionPresent: true,
+  reasonCode: 0
+}, Buffer.from([
+  32, 1, // Fixed Header (CONNACK, Remaining Length)
+  1 // Variable Header (Session Present: 1 => true, Implied Reason code: Success, Implied no properties)
+]), { protocolVersion: 5 }
+)
+
+testParseOnly('Version 5 CONNACK test 2', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  topic: null,
+  payload: null,
+  sessionPresent: true,
+  reasonCode: 0
+}, Buffer.from([
+  32, 2, // Fixed Header (CONNACK, Remaining Length)
+  1, 0 // Variable Header (Session Present: 1 => true, Connect Reason code: Success, Implied no properties)
+]), { protocolVersion: 5 }
+)
+
+testParseAndGenerate('Version 5 CONNACK test 3', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 3,
+  topic: null,
+  payload: null,
+  sessionPresent: true,
+  reasonCode: 0
+}, Buffer.from([
+  32, 3, // Fixed Header (CONNACK, Remaining Length)
+  1, 0, // Variable Header (Session Present: 1 => true, Connect Reason code: Success)
+  0 // no properties
+]), { protocolVersion: 5 }
+)
+
+testParseOnly('Version 5 DISCONNECT test 1', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 0,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  224, 0 // Fixed Header (DISCONNECT, Remaining Length), Implied Reason code: Normal Disconnection
+]), { protocolVersion: 5 }
+)
+
+testParseOnly('Version 5 DISCONNECT test 2', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 1,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  224, 1, // Fixed Header (DISCONNECT, Remaining Length)
+  0 // reason Code (Normal disconnection)
+]), { protocolVersion: 5 }
+)
+
+testParseAndGenerate('Version 5 DISCONNECT test 3', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  topic: null,
+  payload: null,
+  reasonCode: 0
+}, Buffer.from([
+  224, 2, // Fixed Header (DISCONNECT, Remaining Length)
+  0, // reason Code (Normal disconnection)
+  0 // no properties
+]), { protocolVersion: 5 }
+)
+
+testParseGenerate('empty will payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 47,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: Buffer.alloc(0)
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: Buffer.from('password')
+}, Buffer.from([
+  16, 47, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 0, // Will payload length
+  // Will payload
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username
+  0, 8, // Password length
+  112, 97, 115, 115, 119, 111, 114, 100 // Password
+]))
+
+testParseGenerate('empty buffer username payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 20,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: Buffer.from('')
+}, Buffer.from([
+  16, 20, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  130, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 0 // Username length
+  // Empty Username payload
+]))
+
+testParseGenerate('empty string username payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 20,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: ''
+}, Buffer.from([
+  16, 20, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  130, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 0 // Username length
+  // Empty Username payload
+]))
+
+testParseGenerate('empty buffer password payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 30,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: Buffer.from('')
+}, Buffer.from([
+  16, 30, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  194, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username payload
+  0, 0 // Password length
+  // Empty password payload
+]))
+
+testParseGenerate('empty string password payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 30,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: ''
+}, Buffer.from([
+  16, 30, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  194, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username payload
+  0, 0 // Password length
+  // Empty password payload
+]))
+
+testParseGenerate('empty string username and password payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 22,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: '',
+  password: Buffer.from('')
+}, Buffer.from([
+  16, 22, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  194, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 0, // Username length
+  // Empty Username payload
+  0, 0 // Password length
+  // Empty password payload
+]))
+
+testParseGenerate('maximal connect', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: Buffer.from('payload')
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: Buffer.from('password')
+}, Buffer.from([
+  16, 54, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 7, // Will payload length
+  112, 97, 121, 108, 111, 97, 100, // Will payload
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username
+  0, 8, // Password length
+  112, 97, 115, 115, 119, 111, 114, 100 // Password
+]))
+
+testParseGenerate('max connect with special chars', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 57,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'tòpic',
+    payload: Buffer.from('pay£oad')
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'te$t',
+  username: 'u$ern4me',
+  password: Buffer.from('p4$$w0£d')
+}, Buffer.from([
+  16, 57, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 36, 116, // Client ID
+  0, 6, // Will topic length
+  116, 195, 178, 112, 105, 99, // Will topic
+  0, 8, // Will payload length
+  112, 97, 121, 194, 163, 111, 97, 100, // Will payload
+  0, 8, // Username length
+  117, 36, 101, 114, 110, 52, 109, 101, // Username
+  0, 9, // Password length
+  112, 52, 36, 36, 119, 48, 194, 163, 100 // Password
+]))
+
+testGenerateOnly('connect all strings generate', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+}, Buffer.from([
+  16, 54, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116, // Client ID
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 7, // Will payload length
+  112, 97, 121, 108, 111, 97, 100, // Will payload
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username
+  0, 8, // Password length
+  112, 97, 115, 115, 119, 111, 114, 100 // Password
+]))
+
+testParseError('Cannot parse protocolId', Buffer.from([
+  16, 4,
+  0, 6,
+  77, 81
+]))
+
+// missing protocol version on connect
+testParseError('Packet too short', Buffer.from([
+  16, 8, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112 // Protocol ID
+]))
+
+// missing keepalive on connect
+testParseError('Packet too short', Buffer.from([
+  16, 10, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246 // Connect flags
+]))
+
+// missing clientid on connect
+testParseError('Packet too short', Buffer.from([
+  16, 10, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// missing will topic on connect
+testParseError('Cannot parse will topic', Buffer.from([
+  16, 16, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 2, // Will topic length
+  0, 0 // Will topic
+]))
+
+// missing will payload on connect
+testParseError('Cannot parse will payload', Buffer.from([
+  16, 23, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 2, // Will payload length
+  0, 0 // Will payload
+]))
+
+// missing username on connect
+testParseError('Cannot parse username', Buffer.from([
+  16, 32, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 7, // Will payload length
+  112, 97, 121, 108, 111, 97, 100, // Will payload
+  0, 2, // Username length
+  0, 0 // Username
+]))
+
+// missing password on connect
+testParseError('Cannot parse password', Buffer.from([
+  16, 42, // Header
+  0, 6, // Protocol ID length
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  3, // Protocol version
+  246, // Connect flags
+  0, 30, // Keepalive
+  0, 5, // Will topic length
+  116, 111, 112, 105, 99, // Will topic
+  0, 7, // Will payload length
+  112, 97, 121, 108, 111, 97, 100, // Will payload
+  0, 8, // Username length
+  117, 115, 101, 114, 110, 97, 109, 101, // Username
+  0, 2, // Password length
+  0, 0 // Password
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for connect packet', Buffer.from([
+  18, 10, // Header
+  0, 4, // Protocol ID length
+  0x4d, 0x51, 0x54, 0x54, // Protocol ID
+  3, // Protocol version
+  2, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// The Server MUST validate that the reserved flag in the CONNECT Control Packet is set to zero and disconnect the Client if it is not zero [MQTT-3.1.2-3]
+testParseError('Connect flag bit 0 must be 0, but got 1', Buffer.from([
+  16, 10, // Header
+  0, 4, // Protocol ID length
+  0x4d, 0x51, 0x54, 0x54, // Protocol ID
+  3, // Protocol version
+  3, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// If the Will Flag is set to 0 the Will QoS and Will Retain fields in the Connect Flags MUST be set to zero and the Will Topic and Will Message fields MUST NOT be present in the payload [MQTT-3.1.2-11].
+testParseError('Will Retain Flag must be set to zero when Will Flag is set to 0', Buffer.from([
+  16, 10, // Header
+  0, 4, // Protocol ID length
+  0x4d, 0x51, 0x54, 0x54, // Protocol ID
+  3, // Protocol version
+  0x22, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// If the Will Flag is set to 0 the Will QoS and Will Retain fields in the Connect Flags MUST be set to zero and the Will Topic and Will Message fields MUST NOT be present in the payload [MQTT-3.1.2-11].
+testParseError('Will QoS must be set to zero when Will Flag is set to 0', Buffer.from([
+  16, 10, // Header
+  0, 4, // Protocol ID length
+  0x4d, 0x51, 0x54, 0x54, // Protocol ID
+  3, // Protocol version
+  0x12, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// If the Will Flag is set to 0 the Will QoS and Will Retain fields in the Connect Flags MUST be set to zero and the Will Topic and Will Message fields MUST NOT be present in the payload [MQTT-3.1.2-11].
+testParseError('Will QoS must be set to zero when Will Flag is set to 0', Buffer.from([
+  16, 10, // Header
+  0, 4, // Protocol ID length
+  0x4d, 0x51, 0x54, 0x54, // Protocol ID
+  3, // Protocol version
+  0xa, // Connect flags
+  0, 30 // Keepalive
+]))
+
+// CONNECT, SUBSCRIBE, SUBACK, UNSUBSCRIBE, UNSUBACK (v.5) packets must have payload
+// CONNECT
+testParseError('Packet too short', Buffer.from([
+  16, // Header
+  8, // Packet length
+  0, 4, // Protocol ID length
+  77, 81, 84, 84, // MQTT
+  5, // Version
+  2, // Clean Start enabled
+  0, 0, // Keep-Alive
+  0, // Property Length
+  0, 0 // Properties
+  // No payload
+]), { protocolVersion: 5 })
+// SUBSCRIBE
+testParseError('Malformed subscribe, no payload specified', Buffer.from([
+  130, // Header
+  0 // Packet length
+]), { protocolVersion: 5 })
+// SUBACK
+testParseError('Malformed suback, no payload specified', Buffer.from([
+  144, // Header
+  0 // Packet length
+]), { protocolVersion: 5 })
+// UNSUBSCRIBE
+testParseError('Malformed unsubscribe, no payload specified', Buffer.from([
+  162, // Header
+  0 // Packet length
+]), { protocolVersion: 5 })
+// UNSUBACK (v.5)
+testParseError('Malformed unsuback, no payload specified', Buffer.from([
+  176, // Header
+  0 // Packet length
+]), { protocolVersion: 5 })
+// UNSUBACK (v.4)
+testParseError('Malformed unsuback, payload length must be 2', Buffer.from([
+  176, // Header
+  1, // Packet length
+  1
+]), { protocolVersion: 4 })
+// UNSUBACK (v.3)
+testParseError('Malformed unsuback, payload length must be 2', Buffer.from([
+  176, // Header
+  1, // Packet length
+  1
+]), { protocolVersion: 3 })
+
+testParseGenerate('connack with return code 0', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  sessionPresent: false,
+  returnCode: 0
+}, Buffer.from([
+  32, 2, 0, 0
+]))
+
+testParseGenerate('connack MQTT 5 with properties', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 87,
+  sessionPresent: false,
+  reasonCode: 0,
+  properties: {
+    sessionExpiryInterval: 1234,
+    receiveMaximum: 432,
+    maximumQoS: 2,
+    retainAvailable: true,
+    maximumPacketSize: 100,
+    assignedClientIdentifier: 'test',
+    topicAliasMaximum: 456,
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    },
+    wildcardSubscriptionAvailable: true,
+    subscriptionIdentifiersAvailable: true,
+    sharedSubscriptionAvailable: false,
+    serverKeepAlive: 1234,
+    responseInformation: 'test',
+    serverReference: 'test',
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([1, 2, 3, 4])
+  }
+}, Buffer.from([
+  32, 87, 0, 0,
+  84, // properties length
+  17, 0, 0, 4, 210, // sessionExpiryInterval
+  33, 1, 176, // receiveMaximum
+  36, 2, // Maximum qos
+  37, 1, // retainAvailable
+  39, 0, 0, 0, 100, // maximumPacketSize
+  18, 0, 4, 116, 101, 115, 116, // assignedClientIdentifier
+  34, 1, 200, // topicAliasMaximum
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  40, 1, // wildcardSubscriptionAvailable
+  41, 1, // subscriptionIdentifiersAvailable
+  42, 0, // sharedSubscriptionAvailable
+  19, 4, 210, // serverKeepAlive
+  26, 0, 4, 116, 101, 115, 116, // responseInformation
+  28, 0, 4, 116, 101, 115, 116, // serverReference
+  21, 0, 4, 116, 101, 115, 116, // authenticationMethod
+  22, 0, 4, 1, 2, 3, 4 // authenticationData
+]), { protocolVersion: 5 })
+
+testParseGenerate('connack MQTT 5 with properties and doubled user properties', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 100,
+  sessionPresent: false,
+  reasonCode: 0,
+  properties: {
+    sessionExpiryInterval: 1234,
+    receiveMaximum: 432,
+    maximumQoS: 2,
+    retainAvailable: true,
+    maximumPacketSize: 100,
+    assignedClientIdentifier: 'test',
+    topicAliasMaximum: 456,
+    reasonString: 'test',
+    userProperties: {
+      test: ['test', 'test']
+    },
+    wildcardSubscriptionAvailable: true,
+    subscriptionIdentifiersAvailable: true,
+    sharedSubscriptionAvailable: false,
+    serverKeepAlive: 1234,
+    responseInformation: 'test',
+    serverReference: 'test',
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([1, 2, 3, 4])
+  }
+}, Buffer.from([
+  32, 100, 0, 0,
+  97, // properties length
+  17, 0, 0, 4, 210, // sessionExpiryInterval
+  33, 1, 176, // receiveMaximum
+  36, 2, // Maximum qos
+  37, 1, // retainAvailable
+  39, 0, 0, 0, 100, // maximumPacketSize
+  18, 0, 4, 116, 101, 115, 116, // assignedClientIdentifier
+  34, 1, 200, // topicAliasMaximum
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116,
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  40, 1, // wildcardSubscriptionAvailable
+  41, 1, // subscriptionIdentifiersAvailable
+  42, 0, // sharedSubscriptionAvailable
+  19, 4, 210, // serverKeepAlive
+  26, 0, 4, 116, 101, 115, 116, // responseInformation
+  28, 0, 4, 116, 101, 115, 116, // serverReference
+  21, 0, 4, 116, 101, 115, 116, // authenticationMethod
+  22, 0, 4, 1, 2, 3, 4 // authenticationData
+]), { protocolVersion: 5 })
+
+testParseGenerate('connack with return code 0 session present bit set', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  sessionPresent: true,
+  returnCode: 0
+}, Buffer.from([
+  32, 2, 1, 0
+]))
+
+testParseGenerate('connack with return code 5', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  sessionPresent: false,
+  returnCode: 5
+}, Buffer.from([
+  32, 2, 0, 5
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for connack packet', Buffer.from([
+  33, 2, // header
+  0, // flags
+  5 // return code
+]))
+
+// Byte 1 is the "Connect Acknowledge Flags". Bits 7-1 are reserved and MUST be set to 0 [MQTT-3.2.2-1].
+testParseError('Invalid connack flags, bits 7-1 must be set to 0', Buffer.from([
+  32, 2, // header
+  2, // flags
+  5 // return code
+]))
+
+testGenerateError('Invalid return code', {
+  cmd: 'connack',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  sessionPresent: false,
+  returnCode: '5' // returncode must be a number
+})
+
+testParseGenerate('minimal publish', {
+  cmd: 'publish',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 10,
+  topic: 'test',
+  payload: Buffer.from('test')
+}, Buffer.from([
+  48, 10, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  116, 101, 115, 116 // Payload (test)
+]))
+
+testParseGenerate('publish MQTT 5 properties', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 86,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: true,
+    messageExpiryInterval: 4321,
+    topicAlias: 100,
+    responseTopic: 'topic',
+    correlationData: Buffer.from([1, 2, 3, 4]),
+    userProperties: {
+      test: ['test', 'test', 'test']
+    },
+    subscriptionIdentifier: 120,
+    contentType: 'test'
+  }
+}, Buffer.from([
+  61, 86, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  0, 10, // Message ID
+  73, // properties length
+  1, 1, // payloadFormatIndicator
+  2, 0, 0, 16, 225, // message expiry interval
+  35, 0, 100, // topicAlias
+  8, 0, 5, 116, 111, 112, 105, 99, // response topic
+  9, 0, 4, 1, 2, 3, 4, // correlationData
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  11, 120, // subscriptionIdentifier
+  3, 0, 4, 116, 101, 115, 116, // content type
+  116, 101, 115, 116 // Payload (test)
+]), { protocolVersion: 5 })
+
+testParseGenerate('publish MQTT 5 with multiple same properties', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 64,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: true,
+    messageExpiryInterval: 4321,
+    topicAlias: 100,
+    responseTopic: 'topic',
+    correlationData: Buffer.from([1, 2, 3, 4]),
+    userProperties: {
+      test: 'test'
+    },
+    subscriptionIdentifier: [120, 121, 122],
+    contentType: 'test'
+  }
+}, Buffer.from([
+  61, 64, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  0, 10, // Message ID
+  51, // properties length
+  1, 1, // payloadFormatIndicator
+  2, 0, 0, 16, 225, // message expiry interval
+  35, 0, 100, // topicAlias
+  8, 0, 5, 116, 111, 112, 105, 99, // response topic
+  9, 0, 4, 1, 2, 3, 4, // correlationData
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  11, 120, // subscriptionIdentifier
+  11, 121, // subscriptionIdentifier
+  11, 122, // subscriptionIdentifier
+  3, 0, 4, 116, 101, 115, 116, // content type
+  116, 101, 115, 116 // Payload (test)
+]), { protocolVersion: 5 })
+
+testParseGenerate('publish MQTT 5 properties with 0-4 byte varbyte', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 27,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: false,
+    subscriptionIdentifier: [128, 16384, 2097152] // this tests the varbyte handling
+  }
+}, Buffer.from([
+  61, 27, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  0, 10, // Message ID
+  14, // properties length
+  1, 0, // payloadFormatIndicator
+  11, 128, 1, // subscriptionIdentifier
+  11, 128, 128, 1, // subscriptionIdentifier
+  11, 128, 128, 128, 1, // subscriptionIdentifier
+  116, 101, 115, 116 // Payload (test)
+]), { protocolVersion: 5 })
+
+testParseGenerate('publish MQTT 5 properties with max value varbyte', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 22,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: false,
+    subscriptionIdentifier: [1, 268435455]
+  }
+}, Buffer.from([
+  61, 22, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  0, 10, // Message ID
+  9, // properties length
+  1, 0, // payloadFormatIndicator
+  11, 1, // subscriptionIdentifier
+  11, 255, 255, 255, 127, // subscriptionIdentifier (max value)
+  116, 101, 115, 116 // Payload (test)
+]), { protocolVersion: 5 })
+
+; (() => {
+  const buffer = Buffer.alloc(2048)
+  testParseGenerate('2KB publish packet', {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 2054,
+    topic: 'test',
+    payload: buffer
+  }, Buffer.concat([Buffer.from([
+    48, 134, 16, // Header
+    0, 4, // Topic length
+    116, 101, 115, 116 // Topic (test)
+  ]), buffer]))
+})()
+
+; (() => {
+  const maxLength = 268435455
+  const buffer = Buffer.alloc(maxLength - 6)
+  testParseGenerate('Max payload publish packet', {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: maxLength,
+    topic: 'test',
+    payload: buffer
+  }, Buffer.concat([Buffer.from([
+    48, 255, 255, 255, 127, // Header
+    0, 4, // Topic length
+    116, 101, 115, 116 // Topic (test)
+  ]), buffer]))
+})()
+
+testParseGenerate('maximal publish', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  length: 12,
+  dup: true,
+  topic: 'test',
+  messageId: 10,
+  payload: Buffer.from('test')
+}, Buffer.from([
+  61, 12, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic
+  0, 10, // Message ID
+  116, 101, 115, 116 // Payload
+]))
+
+test('publish all strings generate', t => {
+  const message = {
+    cmd: 'publish',
+    retain: true,
+    qos: 2,
+    length: 12,
+    dup: true,
+    topic: 'test',
+    messageId: 10,
+    payload: Buffer.from('test')
+  }
+  const expected = Buffer.from([
+    61, 12, // Header
+    0, 4, // Topic length
+    116, 101, 115, 116, // Topic
+    0, 10, // Message ID
+    116, 101, 115, 116 // Payload
+  ])
+
+  t.equal(mqtt.generate(message).toString('hex'), expected.toString('hex'))
+  t.end()
+})
+
+testParseGenerate('empty publish', {
+  cmd: 'publish',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 6,
+  topic: 'test',
+  payload: Buffer.alloc(0)
+}, Buffer.from([
+  48, 6, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116 // Topic
+  // Empty payload
+]))
+
+// A PUBLISH Packet MUST NOT have both QoS bits set to 1. If a Server or Client receives a PUBLISH Packet which has both QoS bits set to 1 it MUST close the Network Connection [MQTT-3.3.1-4].
+testParseError('Packet must not have both QoS bits set to 1', Buffer.from([
+  0x36, 6, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116 // Topic
+  // Empty payload
+]))
+
+test('splitted publish parse', t => {
+  t.plan(3)
+
+  const parser = mqtt.parser()
+  const expected = {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 10,
+    topic: 'test',
+    payload: Buffer.from('test')
+  }
+
+  parser.on('packet', packet => {
+    t.deepLooseEqual(packet, expected, 'expected packet')
+  })
+
+  t.equal(parser.parse(Buffer.from([
+    48, 10, // Header
+    0, 4, // Topic length
+    116, 101, 115, 116 // Topic (test)
+  ])), 6, 'remaining bytes')
+
+  t.equal(parser.parse(Buffer.from([
+    116, 101, 115, 116 // Payload (test)
+  ])), 0, 'remaining bytes')
+})
+
+test('split publish longer', t => {
+  t.plan(3)
+
+  const length = 255
+  const topic = 'test'
+  // Minus two bytes for the topic length specifier
+  const payloadLength = length - topic.length - 2
+
+  const parser = mqtt.parser()
+  const expected = {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length,
+    topic,
+    payload: Buffer.from('a'.repeat(payloadLength))
+  }
+
+  parser.on('packet', packet => {
+    t.deepLooseEqual(packet, expected, 'expected packet')
+  })
+
+  t.equal(parser.parse(Buffer.from([
+    48, 255, 1, // Header
+    0, topic.length, // Topic length
+    116, 101, 115, 116 // Topic (test)
+  ])), 6, 'remaining bytes')
+
+  t.equal(parser.parse(Buffer.from(Array(payloadLength).fill(97))),
+    0, 'remaining bytes')
+})
+
+test('split length parse', t => {
+  t.plan(4)
+
+  const length = 255
+  const topic = 'test'
+  const payloadLength = length - topic.length - 2
+
+  const parser = mqtt.parser()
+  const expected = {
+    cmd: 'publish',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length,
+    topic,
+    payload: Buffer.from('a'.repeat(payloadLength))
+  }
+
+  parser.on('packet', packet => {
+    t.deepLooseEqual(packet, expected, 'expected packet')
+  })
+
+  t.equal(parser.parse(Buffer.from([
+    48, 255 // Header (partial length)
+  ])), 1, 'remaining bytes')
+
+  t.equal(parser.parse(Buffer.from([
+    1, // Rest of header length
+    0, topic.length, // Topic length
+    116, 101, 115, 116 // Topic (test)
+  ])), 6, 'remaining bytes')
+
+  t.equal(parser.parse(Buffer.from(Array(payloadLength).fill(97))),
+    0, 'remaining bytes')
+})
+
+testGenerateError('Invalid variable byte integer: 268435456', {
+  cmd: 'publish',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: (268435455 + 1),
+  topic: 'test',
+  payload: Buffer.alloc(268435455 + 1 - 6)
+}, {}, 'Length var byte integer over max allowed value throws error')
+
+testGenerateError('Invalid subscriptionIdentifier: 268435456', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 27,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: false,
+    subscriptionIdentifier: 268435456
+  }
+}, { protocolVersion: 5 }, 'MQTT 5.0 var byte integer >24 bits throws error')
+
+testParseGenerate('puback', {
+  cmd: 'puback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  messageId: 2
+}, Buffer.from([
+  64, 2, // Header
+  0, 2 // Message ID
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for puback packet', Buffer.from([
+  65, 2, // Header
+  0, 2 // Message ID
+]))
+
+testParseGenerate('puback without reason and no MQTT 5 properties', {
+  cmd: 'puback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  messageId: 2,
+  reasonCode: 0
+}, Buffer.from([
+  64, 2, // Header
+  0, 2 // Message ID
+]), { protocolVersion: 5 })
+
+testParseGenerate('puback with reason and no MQTT 5 properties', {
+  cmd: 'puback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 4,
+  messageId: 2,
+  reasonCode: 16
+}, Buffer.from([
+  64, 4, // Header
+  0, 2, // Message ID
+  16, // reason code
+  0 // no user properties
+]), { protocolVersion: 5 })
+
+testParseGenerate('puback MQTT 5 properties', {
+  cmd: 'puback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 24,
+  messageId: 2,
+  reasonCode: 16,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  64, 24, // Header
+  0, 2, // Message ID
+  16, // reason code
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]), { protocolVersion: 5 })
+
+testParseError('Invalid puback reason code', Buffer.from([
+  64, 4, // Header
+  0, 2, // Message ID
+  0x11, // reason code
+  0 // properties length
+]), { protocolVersion: 5 })
+
+testParseGenerate('pubrec', {
+  cmd: 'pubrec',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  messageId: 2
+}, Buffer.from([
+  80, 2, // Header
+  0, 2 // Message ID
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for pubrec packet', Buffer.from([
+  81, 2, // Header
+  0, 2 // Message ID
+]))
+
+testParseGenerate('pubrec MQTT 5 properties', {
+  cmd: 'pubrec',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 24,
+  messageId: 2,
+  reasonCode: 16,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  80, 24, // Header
+  0, 2, // Message ID
+  16, // reason code
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]), { protocolVersion: 5 })
+
+testParseGenerate('pubrel', {
+  cmd: 'pubrel',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 2,
+  messageId: 2
+}, Buffer.from([
+  98, 2, // Header
+  0, 2 // Message ID
+]))
+
+testParseError('Invalid pubrel reason code', Buffer.from([
+  98, 4, // Header
+  0, 2, // Message ID
+  0x11, // Reason code
+  0 // Properties length
+]), { protocolVersion: 5 })
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x2 for pubrel packet', Buffer.from([
+  96, 2, // Header
+  0, 2 // Message ID
+]))
+
+testParseGenerate('pubrel MQTT5 properties', {
+  cmd: 'pubrel',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 24,
+  messageId: 2,
+  reasonCode: 0x92,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  98, 24, // Header
+  0, 2, // Message ID
+  0x92, // reason code
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]), { protocolVersion: 5 })
+
+testParseError('Invalid pubrel reason code', Buffer.from([
+  98, 4, // Header
+  0, 2, // Message ID
+  16, // reason code
+  0 // properties length
+]), { protocolVersion: 5 })
+
+testParseGenerate('pubcomp', {
+  cmd: 'pubcomp',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  messageId: 2
+}, Buffer.from([
+  112, 2, // Header
+  0, 2 // Message ID
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for pubcomp packet', Buffer.from([
+  113, 2, // Header
+  0, 2 // Message ID
+]))
+
+testParseGenerate('pubcomp MQTT 5 properties', {
+  cmd: 'pubcomp',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 24,
+  messageId: 2,
+  reasonCode: 0x92,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  112, 24, // Header
+  0, 2, // Message ID
+  0x92, // reason code
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]), { protocolVersion: 5 })
+
+testParseError('Invalid pubcomp reason code', Buffer.from([
+  112, 4, // Header
+  0, 2, // Message ID
+  16, // reason code
+  0 // properties length
+]), { protocolVersion: 5 })
+
+testParseError('Invalid header flag bits, must be 0x2 for subscribe packet', Buffer.from([
+  128, 9, // Header (subscribeqos=0length=9)
+  0, 6, // Message ID (6)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0 // Qos (0)
+]))
+
+testParseGenerate('subscribe to one topic', {
+  cmd: 'subscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 9,
+  subscriptions: [
+    {
+      topic: 'test',
+      qos: 0
+    }
+  ],
+  messageId: 6
+}, Buffer.from([
+  130, 9, // Header (subscribeqos=1length=9)
+  0, 6, // Message ID (6)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0 // Qos (0)
+]))
+
+testParseError('Invalid subscribe QoS, must be <= 2', Buffer.from([
+  130, 9, // Header (subscribeqos=0length=9)
+  0, 6, // Message ID (6)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  3 // Qos
+]))
+
+testParseError('Invalid subscribe topic flag bits, bits 7-6 must be 0', Buffer.from([
+  130, 10, // Header (subscribeqos=0length=9)
+  0, 6, // Message ID (6)
+  0, // Property length (0)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0x80 // Flags
+]), { protocolVersion: 5 })
+
+testParseError('Invalid retain handling, must be <= 2', Buffer.from([
+  130, 10, // Header (subscribeqos=0length=9)
+  0, 6, // Message ID (6)
+  0, // Property length (0)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0x30 // Flags
+]), { protocolVersion: 5 })
+
+testParseError('Invalid subscribe topic flag bits, bits 7-2 must be 0', Buffer.from([
+  130, 9, // Header (subscribeqos=0length=9)
+  0, 6, // Message ID (6)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0x08 // Flags
+]))
+
+testParseGenerate('subscribe to one topic by MQTT 5', {
+  cmd: 'subscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 26,
+  subscriptions: [
+    {
+      topic: 'test',
+      qos: 0,
+      nl: false,
+      rap: true,
+      rh: 1
+    }
+  ],
+  messageId: 6,
+  properties: {
+    subscriptionIdentifier: 145,
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  130, 26, // Header (subscribeqos=1length=9)
+  0, 6, // Message ID (6)
+  16, // properties length
+  11, 145, 1, // subscriptionIdentifier
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  24 // settings(qos: 0, noLocal: false, Retain as Published: true, retain handling: 1)
+]), { protocolVersion: 5 })
+
+testParseGenerate('subscribe to three topics', {
+  cmd: 'subscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 23,
+  subscriptions: [
+    {
+      topic: 'test',
+      qos: 0
+    }, {
+      topic: 'uest',
+      qos: 1
+    }, {
+      topic: 'tfst',
+      qos: 2
+    }
+  ],
+  messageId: 6
+}, Buffer.from([
+  130, 23, // Header (publishqos=1length=9)
+  0, 6, // Message ID (6)
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  0, // Qos (0)
+  0, 4, // Topic length
+  117, 101, 115, 116, // Topic (uest)
+  1, // Qos (1)
+  0, 4, // Topic length
+  116, 102, 115, 116, // Topic (tfst)
+  2 // Qos (2)
+]))
+
+testParseGenerate('subscribe to 3 topics by MQTT 5', {
+  cmd: 'subscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 40,
+  subscriptions: [
+    {
+      topic: 'test',
+      qos: 0,
+      nl: false,
+      rap: true,
+      rh: 1
+    },
+    {
+      topic: 'uest',
+      qos: 1,
+      nl: false,
+      rap: false,
+      rh: 0
+    }, {
+      topic: 'tfst',
+      qos: 2,
+      nl: true,
+      rap: false,
+      rh: 0
+    }
+  ],
+  messageId: 6,
+  properties: {
+    subscriptionIdentifier: 145,
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  130, 40, // Header (subscribeqos=1length=9)
+  0, 6, // Message ID (6)
+  16, // properties length
+  11, 145, 1, // subscriptionIdentifier
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  0, 4, // Topic length,
+  116, 101, 115, 116, // Topic (test)
+  24, // settings(qos: 0, noLocal: false, Retain as Published: true, retain handling: 1)
+  0, 4, // Topic length
+  117, 101, 115, 116, // Topic (uest)
+  1, // Qos (1)
+  0, 4, // Topic length
+  116, 102, 115, 116, // Topic (tfst)
+  6 // Qos (2), No Local: true
+]), { protocolVersion: 5 })
+
+testParseGenerate('suback', {
+  cmd: 'suback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 5,
+  granted: [0, 1, 2],
+  messageId: 6
+}, Buffer.from([
+  144, 5, // Header
+  0, 6, // Message ID
+  0, 1, 2
+]))
+
+testParseGenerate('suback', {
+  cmd: 'suback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 7,
+  granted: [0, 1, 2, 128],
+  messageId: 6
+}, Buffer.from([
+  144, 7, // Header
+  0, 6, // Message ID
+  0, // Property length
+  0, 1, 2, 128 // Granted qos (0, 1, 2) and a rejected being 0x80
+]), { protocolVersion: 5 })
+
+testParseError('Invalid suback QoS, must be 0, 1, 2 or 128', Buffer.from([
+  144, 6, // Header
+  0, 6, // Message ID
+  0, 1, 2, 3 // Granted qos (0, 1, 2)
+]))
+
+testParseError('Invalid suback code', Buffer.from([
+  144, 6, // Header
+  0, 6, // Message ID
+  0, 1, 2, 0x79 // Granted qos (0, 1, 2) and an invalid code
+]), { protocolVersion: 5 })
+
+testParseGenerate('suback MQTT 5', {
+  cmd: 'suback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 27,
+  granted: [0, 1, 2, 128],
+  messageId: 6,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  144, 27, // Header
+  0, 6, // Message ID
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  0, 1, 2, 128 // Granted qos (0, 1, 2) and a rejected being 0x80
+]), { protocolVersion: 5 })
+
+testParseGenerate('unsubscribe', {
+  cmd: 'unsubscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 14,
+  unsubscriptions: [
+    'tfst',
+    'test'
+  ],
+  messageId: 7
+}, Buffer.from([
+  162, 14,
+  0, 7, // Message ID (7)
+  0, 4, // Topic length
+  116, 102, 115, 116, // Topic (tfst)
+  0, 4, // Topic length,
+  116, 101, 115, 116 // Topic (test)
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x2 for unsubscribe packet', Buffer.from([
+  160, 14,
+  0, 7, // Message ID (7)
+  0, 4, // Topic length
+  116, 102, 115, 116, // Topic (tfst)
+  0, 4, // Topic length,
+  116, 101, 115, 116 // Topic (test)
+]))
+
+testGenerateError('Invalid unsubscriptions', {
+  cmd: 'unsubscribe',
+  retain: false,
+  qos: 1,
+  dup: true,
+  length: 5,
+  unsubscriptions: 5,
+  messageId: 7
+}, {}, 'unsubscribe with unsubscriptions not an array')
+
+testGenerateError('Invalid unsubscriptions', {
+  cmd: 'unsubscribe',
+  retain: false,
+  qos: 1,
+  dup: true,
+  length: 5,
+  unsubscriptions: [1, 2],
+  messageId: 7
+}, {}, 'unsubscribe with unsubscriptions as an object')
+
+testParseGenerate('unsubscribe MQTT 5', {
+  cmd: 'unsubscribe',
+  retain: false,
+  qos: 1,
+  dup: false,
+  length: 28,
+  unsubscriptions: [
+    'tfst',
+    'test'
+  ],
+  messageId: 7,
+  properties: {
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  162, 28,
+  0, 7, // Message ID (7)
+  13, // properties length
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  0, 4, // Topic length
+  116, 102, 115, 116, // Topic (tfst)
+  0, 4, // Topic length,
+  116, 101, 115, 116 // Topic (test)
+]), { protocolVersion: 5 })
+
+testParseGenerate('unsuback', {
+  cmd: 'unsuback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  messageId: 8
+}, Buffer.from([
+  176, 2, // Header
+  0, 8 // Message ID
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for unsuback packet', Buffer.from([
+  177, 2, // Header
+  0, 8 // Message ID
+]))
+
+testParseGenerate('unsuback MQTT 5', {
+  cmd: 'unsuback',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 25,
+  messageId: 8,
+  properties: {
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  },
+  granted: [0, 128]
+}, Buffer.from([
+  176, 25, // Header
+  0, 8, // Message ID
+  20, // properties length
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  0, 128 // success and error
+]), { protocolVersion: 5 })
+
+testParseError('Invalid unsuback code', Buffer.from([
+  176, 4, // Header
+  0, 8, // Message ID
+  0, // properties length
+  0x84 // reason codes
+]), { protocolVersion: 5 })
+
+testParseGenerate('pingreq', {
+  cmd: 'pingreq',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 0
+}, Buffer.from([
+  192, 0 // Header
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for pingreq packet', Buffer.from([
+  193, 0 // Header
+]))
+
+testParseGenerate('pingresp', {
+  cmd: 'pingresp',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 0
+}, Buffer.from([
+  208, 0 // Header
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for pingresp packet', Buffer.from([
+  209, 0 // Header
+]))
+
+testParseGenerate('disconnect', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 0
+}, Buffer.from([
+  224, 0 // Header
+]))
+
+// Where a flag bit is marked as “Reserved” in Table 2.2 - Flag Bits, it is reserved for future use and MUST be set to the value listed in that table [MQTT-2.2.2-1]. If invalid flags are received, the receiver MUST close the Network Connection [MQTT-2.2.2-2]
+testParseError('Invalid header flag bits, must be 0x0 for disconnect packet', Buffer.from([
+  225, 0 // Header
+]))
+
+testParseGenerate('disconnect MQTT 5', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 34,
+  reasonCode: 0,
+  properties: {
+    sessionExpiryInterval: 145,
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    },
+    serverReference: 'test'
+  }
+}, Buffer.from([
+  224, 34, // Header
+  0, // reason code
+  32, // properties length
+  17, 0, 0, 0, 145, // sessionExpiryInterval
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  28, 0, 4, 116, 101, 115, 116// serverReference
+]), { protocolVersion: 5 })
+
+testParseGenerate('disconnect MQTT 5 with no properties', {
+  cmd: 'disconnect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 2,
+  reasonCode: 0
+}, Buffer.from([
+  224, 2, // Fixed Header (DISCONNECT, Remaining Length)
+  0, // Reason Code (Normal Disconnection)
+  0 // Property Length (0 => No Properties)
+]), { protocolVersion: 5 })
+
+testParseError('Invalid disconnect reason code', Buffer.from([
+  224, 2, // Fixed Header (DISCONNECT, Remaining Length)
+  0x05, // Reason Code (Normal Disconnection)
+  0 // Property Length (0 => No Properties)
+]), { protocolVersion: 5 })
+
+testParseGenerate('auth MQTT 5', {
+  cmd: 'auth',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 36,
+  reasonCode: 0,
+  properties: {
+    authenticationMethod: 'test',
+    authenticationData: Buffer.from([0, 1, 2, 3]),
+    reasonString: 'test',
+    userProperties: {
+      test: 'test'
+    }
+  }
+}, Buffer.from([
+  240, 36, // Header
+  0, // reason code
+  34, // properties length
+  21, 0, 4, 116, 101, 115, 116, // auth method
+  22, 0, 4, 0, 1, 2, 3, // auth data
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]), { protocolVersion: 5 })
+
+testParseError('Invalid auth reason code', Buffer.from([
+  240, 2, // Fixed Header (DISCONNECT, Remaining Length)
+  0x17, // Reason Code
+  0 // Property Length (0 => No Properties)
+]), { protocolVersion: 5 })
+
+testGenerateError('Invalid protocolId', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 42,
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid protocol version', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 1,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('clientId must be supplied before 3.1.1', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('clientId must be given if cleanSession set to 0', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQTT',
+  protocolVersion: 4,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: false,
+  keepalive: 30,
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid keepalive', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 'hello',
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid keepalive', {
+  cmd: 'connect',
+  keepalive: 3.1416
+})
+
+testGenerateError('Invalid will', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: 42,
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid will topic', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid will payload', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 42
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 'password'
+})
+
+testGenerateError('Invalid username', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 42,
+  password: 'password'
+})
+
+testGenerateError('Invalid password', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  username: 'username',
+  password: 42
+})
+
+testGenerateError('Username is required to use password', {
+  cmd: 'connect',
+  retain: false,
+  qos: 0,
+  dup: false,
+  length: 54,
+  protocolId: 'MQIsdp',
+  protocolVersion: 3,
+  will: {
+    retain: true,
+    qos: 2,
+    topic: 'topic',
+    payload: 'payload'
+  },
+  clean: true,
+  keepalive: 30,
+  clientId: 'test',
+  password: 'password'
+})
+
+testGenerateError('Invalid messageExpiryInterval: -4321', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 60,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: true,
+    messageExpiryInterval: -4321,
+    topicAlias: 100,
+    responseTopic: 'topic',
+    correlationData: Buffer.from([1, 2, 3, 4]),
+    userProperties: {
+      test: 'test'
+    },
+    subscriptionIdentifier: 120,
+    contentType: 'test'
+  }
+}, { protocolVersion: 5 })
+
+testGenerateError('Invalid topicAlias: -100', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 60,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: true,
+    messageExpiryInterval: 4321,
+    topicAlias: -100,
+    responseTopic: 'topic',
+    correlationData: Buffer.from([1, 2, 3, 4]),
+    userProperties: {
+      test: 'test'
+    },
+    subscriptionIdentifier: 120,
+    contentType: 'test'
+  }
+}, { protocolVersion: 5 })
+
+testGenerateError('Invalid subscriptionIdentifier: -120', {
+  cmd: 'publish',
+  retain: true,
+  qos: 2,
+  dup: true,
+  length: 60,
+  topic: 'test',
+  payload: Buffer.from('test'),
+  messageId: 10,
+  properties: {
+    payloadFormatIndicator: true,
+    messageExpiryInterval: 4321,
+    topicAlias: 100,
+    responseTopic: 'topic',
+    correlationData: Buffer.from([1, 2, 3, 4]),
+    userProperties: {
+      test: 'test'
+    },
+    subscriptionIdentifier: -120,
+    contentType: 'test'
+  }
+}, { protocolVersion: 5 })
+
+test('support cork', t => {
+  t.plan(9)
+
+  const dest = WS()
+
+  dest._write = (chunk, enc, cb) => {
+    t.pass('_write called')
+    cb()
+  }
+
+  mqtt.writeToStream({
+    cmd: 'connect',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 18,
+    protocolId: 'MQIsdp',
+    protocolVersion: 3,
+    clean: false,
+    keepalive: 30,
+    clientId: 'test'
+  }, dest)
+
+  dest.end()
+})
+
+// The following test case was designed after experiencing errors
+// when trying to connect with tls on a non tls mqtt port
+// the specific behaviour is:
+// - first byte suggests this is a connect message
+// - second byte suggests message length to be smaller than buffer length
+//   thus payload processing starts
+// - the first two bytes suggest a protocol identifier string length
+//   that leads the parser pointer close to the end of the buffer
+// - when trying to read further connect flags the buffer produces
+//   a "out of range" Error
+//
+testParseError('Packet too short', Buffer.from([
+  16, 9,
+  0, 6,
+  77, 81, 73, 115, 100, 112,
+  3
+]))
+
+// CONNECT Packets that show other protocol IDs than
+// the valid values MQTT and MQIsdp should cause an error
+// those packets are a hint that this is not a mqtt connection
+testParseError('Invalid protocolId', Buffer.from([
+  16, 18,
+  0, 6,
+  65, 65, 65, 65, 65, 65, // AAAAAA
+  3, // Protocol version
+  0, // Connect flags
+  0, 10, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+// CONNECT Packets that contain an unsupported protocol version
+// Flag (i.e. not `3` or `4` or '5') should cause an error
+testParseError('Invalid protocol version', Buffer.from([
+  16, 18,
+  0, 6,
+  77, 81, 73, 115, 100, 112, // Protocol ID
+  1, // Protocol version
+  0, // Connect flags
+  0, 10, // Keepalive
+  0, 4, // Client ID length
+  116, 101, 115, 116 // Client ID
+]))
+
+// When a packet contains a string in the variable header and the
+// given string length of this exceeds the overall length of the packet that
+// was specified in the fixed header, parsing must fail.
+// this case simulates this behavior with the protocol ID string of the
+// CONNECT packet. The fixed header suggests a remaining length of 8 bytes
+// which would be exceeded by the string length of 15
+// in this case, a protocol ID parse error is expected
+testParseError('Cannot parse protocolId', Buffer.from([
+  16, 8, // Fixed header
+  0, 15, // string length 15 --> 15 > 8 --> error!
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112,
+  77, 81, 73, 115, 100, 112
+]))
+
+testParseError('Unknown property', Buffer.from([
+  61, 60, // Header
+  0, 4, // Topic length
+  116, 101, 115, 116, // Topic (test)
+  0, 10, // Message ID
+  47, // properties length
+  126, 1, // unknown property
+  2, 0, 0, 16, 225, // message expiry interval
+  35, 0, 100, // topicAlias
+  8, 0, 5, 116, 111, 112, 105, 99, // response topic
+  9, 0, 4, 1, 2, 3, 4, // correlationData
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116, // userProperties
+  11, 120, // subscriptionIdentifier
+  3, 0, 4, 116, 101, 115, 116, // content type
+  116, 101, 115, 116 // Payload (test)
+]), { protocolVersion: 5 })
+
+testParseError('Not supported auth packet for this version MQTT', Buffer.from([
+  240, 36, // Header
+  0, // reason code
+  34, // properties length
+  21, 0, 4, 116, 101, 115, 116, // auth method
+  22, 0, 4, 0, 1, 2, 3, // auth data
+  31, 0, 4, 116, 101, 115, 116, // reasonString
+  38, 0, 4, 116, 101, 115, 116, 0, 4, 116, 101, 115, 116 // userProperties
+]))
+
+// When a Subscribe packet contains a topic_filter and the given
+// length is topic_filter.length + 1 then the last byte (requested QoS) is interpreted as topic_filter
+// reading the requested_qos at the end causes 'Index out of range' read
+testParseError('Malformed Subscribe Payload', Buffer.from([
+  130, 14, // subscribe header and remaining length
+  0, 123, // packet ID
+  0, 10, // topic filter length
+  104, 105, 106, 107, 108, 47, 109, 110, 111, // topic filter with length of 9 bytes
+  0 // requested QoS
+]))
+
+test('Cannot parse property code type', t => {
+  const packets = Buffer.from([
+    16, 16, 0, 4, 77, 81, 84, 84, 5, 2, 0, 60, 3, 33, 0, 20, 0, 0, 98, 2, 211, 1, 224, 2, 0, 32
+  ])
+
+  t.plan(3)
+
+  const parser = mqtt.parser()
+
+  parser.on('error', err => {
+    t.equal(err.message, 'Cannot parse property code type', 'expected error message')
+    t.end()
+  })
+
+  parser.on('packet', (packet) => {
+    t.pass('Packet parsed')
+  })
+
+  parser.parse(packets)
+})
+
+testWriteToStreamError('Invalid command', {
+  cmd: 'invalid'
+})
+
+testWriteToStreamError('Invalid protocolId', {
+  cmd: 'connect',
+  protocolId: {}
+})
+
+test('userProperties null prototype', t => {
+  t.plan(3)
+
+  const packet = mqtt.generate({
+    cmd: 'connect',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 125,
+    protocolId: 'MQTT',
+    protocolVersion: 5,
+    will: {
+      retain: true,
+      qos: 2,
+      properties: {
+        willDelayInterval: 1234,
+        payloadFormatIndicator: false,
+        messageExpiryInterval: 4321,
+        contentType: 'test',
+        responseTopic: 'topic',
+        correlationData: Buffer.from([1, 2, 3, 4]),
+        userProperties: {
+          test: 'test'
+        }
+      },
+      topic: 'topic',
+      payload: Buffer.from([4, 3, 2, 1])
+    },
+    clean: true,
+    keepalive: 30,
+    properties: {
+      sessionExpiryInterval: 1234,
+      receiveMaximum: 432,
+      maximumPacketSize: 100,
+      topicAliasMaximum: 456,
+      requestResponseInformation: true,
+      requestProblemInformation: true,
+      userProperties: {
+        test: 'test'
+      },
+      authenticationMethod: 'test',
+      authenticationData: Buffer.from([1, 2, 3, 4])
+    },
+    clientId: 'test'
+  })
+
+  const parser = mqtt.parser()
+
+  parser.on('packet', packet => {
+    t.equal(packet.cmd, 'connect')
+    t.equal(Object.getPrototypeOf(packet.properties.userProperties), null)
+    t.equal(Object.getPrototypeOf(packet.will.properties.userProperties), null)
+  })
+
+  parser.parse(packet)
+})
+
+test('stops parsing after first error', t => {
+  t.plan(4)
+
+  const parser = mqtt.parser()
+
+  let packetCount = 0
+  let errorCount = 0
+  let expectedPackets = 1
+  let expectedErrors = 1
+
+  parser.on('packet', packet => {
+    t.ok(++packetCount <= expectedPackets, `expected <= ${expectedPackets} packets`)
+  })
+
+  parser.on('error', erroneous => {
+    t.ok(++errorCount <= expectedErrors, `expected <= ${expectedErrors} errors`)
+  })
+
+  parser.parse(Buffer.from([
+    // First, a valid connect packet:
+
+    16, 12, // Header
+    0, 4, // Protocol ID length
+    77, 81, 84, 84, // Protocol ID
+    4, // Protocol version
+    2, // Connect flags
+    0, 30, // Keepalive
+    0, 0, // Client ID length
+
+    // Then an invalid subscribe packet:
+
+    128, 9, // Header (subscribeqos=0length=9)
+    0, 6, // Message ID (6)
+    0, 4, // Topic length,
+    116, 101, 115, 116, // Topic (test)
+    0, // Qos (0)
+
+    // And another invalid subscribe packet:
+
+    128, 9, // Header (subscribeqos=0length=9)
+    0, 6, // Message ID (6)
+    0, 4, // Topic length,
+    116, 101, 115, 116, // Topic (test)
+    0, // Qos (0)
+
+    // Finally, a valid disconnect packet:
+
+    224, 0 // Header
+  ]))
+
+  // Calling parse again clears the error and continues parsing
+  packetCount = 0
+  errorCount = 0
+  expectedPackets = 2
+  expectedErrors = 0
+
+  parser.parse(Buffer.from([
+    // Connect:
+
+    16, 12, // Header
+    0, 4, // Protocol ID length
+    77, 81, 84, 84, // Protocol ID
+    4, // Protocol version
+    2, // Connect flags
+    0, 30, // Keepalive
+    0, 0, // Client ID length
+
+    // Disconnect:
+
+    224, 0 // Header
+  ]))
+})
+
+test('undefined properties', t => {
+  t.plan(2)
+
+  const packet = mqtt.generate({
+    cmd: 'connect',
+    retain: false,
+    qos: 0,
+    dup: false,
+    length: 125,
+    protocolId: 'MQTT',
+    protocolVersion: 5,
+    will: {
+      retain: true,
+      qos: 2,
+      properties: {
+        willDelayInterval: 1234,
+        payloadFormatIndicator: false,
+        messageExpiryInterval: 4321,
+        contentType: 'test',
+        responseTopic: 'topic',
+        correlationData: Buffer.from([1, 2, 3, 4]),
+        userProperties: {
+          test: 'test'
+        }
+      },
+      topic: 'topic',
+      payload: Buffer.from([4, 3, 2, 1])
+    },
+    clean: true,
+    keepalive: 30,
+    properties: {
+      sessionExpiryInterval: 1234,
+      receiveMaximum: 432,
+      maximumPacketSize: 100,
+      topicAliasMaximum: 456,
+      requestResponseInformation: true,
+      requestProblemInformation: true,
+      correlationData: undefined,
+      userProperties: {
+        test: 'test'
+      },
+      authenticationMethod: 'test',
+      authenticationData: Buffer.from([1, 2, 3, 4])
+    },
+    clientId: 'test'
+  })
+
+  const parser = mqtt.parser()
+
+  parser.on('packet', packet => {
+    t.equal(packet.cmd, 'connect')
+    t.equal(Object.hasOwn(packet.properties, 'correlationData'), false)
+  })
+
+  parser.parse(packet)
+})
+
+testGenerateErrorMultipleCmds([
+  'publish',
+  'puback',
+  'pubrec',
+  'pubrel',
+  'subscribe',
+  'suback',
+  'unsubscribe',
+  'unsuback'
+], 'Invalid messageId', {
+  qos: 1, // required for publish
+  topic: 'test', // required for publish
+  messageId: 'a'
+}, {})
diff --git a/mqtt-backend/node_modules/mqtt-packet/testRandom.js b/mqtt-backend/node_modules/mqtt-packet/testRandom.js
new file mode 100644
index 0000000..84195bd
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/testRandom.js
@@ -0,0 +1,86 @@
+const mqtt = require('./')
+const crypto = require('crypto')
+const max = 1E5
+const start = Date.now() / 1000
+let errors = 0
+let packets = 0
+let randomPacket
+const firstBytes = [
+  16 * 1, // CONNECT
+  16 * 2, // CONNACK
+  16 * 3, // PUBLISH, QoS: 0, No Retain, No Dup
+  16 * 3 + 1, // PUBLISH, QoS: 0, Retain, No Dup
+  16 * 3 + 8, // PUBLISH, QoS: 0, No Retain, Dup
+  16 * 3 + 1 + 8, // PUBLISH, QoS: 0, Retain, Dup
+  16 * 3 + 2, // PUBLISH, QoS: 1, No Retain, No Dup
+  16 * 3 + 2 + 1, // PUBLISH, QoS: 1, Retain, No Dup
+  16 * 3 + 2 + 8, // PUBLISH, QoS: 1, No Retain, Dup
+  16 * 3 + 2 + 1 + 8, // PUBLISH, QoS: 1, Retain, Dup
+  16 * 3 + 4, // PUBLISH, QoS: 2, No Retain, No Dup
+  16 * 3 + 4 + 1, // PUBLISH, QoS: 2, Retain, No Dup
+  16 * 3 + 4 + 8, // PUBLISH, QoS: 2, No Retain, Dup
+  16 * 3 + 4 + 1 + 8, // PUBLISH, QoS: 2, Retain, Dup
+  16 * 4, // PUBACK
+  16 * 5, // PUBREC
+  16 * 6, // PUBREL
+  16 * 7, // PUBCOMP
+  16 * 8, // SUBSCRIBE
+  16 * 9, // SUBACK
+  16 * 10, // UNSUBSCRIBE
+  16 * 11, // UNSUBACK
+  16 * 12, // PINGREQ
+  16 * 13, // PINGRESP
+  16 * 14, // DISCONNECT
+  16 * 15 // RESERVED
+]
+
+function doParse () {
+  const parser = mqtt.parser()
+
+  parser.on('error', onError)
+  parser.on('packet', onPacket)
+  randomPacket = crypto.randomBytes(Math.floor(Math.random() * 512))
+
+  // Increase probability to have a valid first byte in order to at least
+  // enter the parser
+  if (Math.random() > 0.2 && randomPacket.length > 0) randomPacket.writeUInt8(firstBytes[Math.floor(Math.random() * firstBytes.length)], 0)
+  parser.parse(randomPacket)
+}
+
+try {
+  console.log('Starting benchmark')
+  for (let i = 0; i < max; i++) {
+    doParse()
+  }
+} catch (e) {
+  console.log('Exception occurred at packet')
+  console.log(randomPacket)
+  console.log(e.message)
+  console.log(e.stack)
+}
+
+function onError () {
+  errors++
+}
+
+function onPacket () {
+  packets++
+}
+
+const delta = Math.abs(max - packets - errors)
+const time = Date.now() / 1000 - start
+console.log('Benchmark complete')
+console.log('==========================')
+console.log('Sent packets:', max)
+console.log('Total time:', Math.round(time * 100) / 100, 'seconds', '\r\n')
+
+console.log('Valid packets:', packets)
+console.log('Erroneous packets:', errors)
+
+if ((max - packets - errors) < 0) console.log('Excess packets:', delta, '\r\n')
+else console.log('Missing packets:', delta, '\r\n')
+
+console.log('Total packets:', packets + errors)
+console.log('Total errors:', errors + delta)
+console.log('Error rate:', `${((errors + delta) / max * 100).toFixed(2)}%`)
+console.log('==========================')
diff --git a/mqtt-backend/node_modules/mqtt-packet/types/index.d.ts b/mqtt-backend/node_modules/mqtt-packet/types/index.d.ts
new file mode 100644
index 0000000..96960a8
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/types/index.d.ts
@@ -0,0 +1,257 @@
+import EventEmitter = NodeJS.EventEmitter
+import WritableStream = NodeJS.WritableStream
+
+export declare type QoS = 0 | 1 | 2
+
+export declare type PacketCmd = 'auth' |
+  'connack' |
+  'connect' |
+  'disconnect' |
+  'pingreq' |
+  'pingresp' |
+  'puback' |
+  'pubcomp' |
+  'publish' |
+  'pubrel' |
+  'pubrec' |
+  'suback' |
+  'subscribe' |
+  'unsuback' |
+  'unsubscribe'
+
+export declare type UserProperties = {[index: string]: string | string[]}
+
+export interface IPacket {
+  cmd: PacketCmd
+  messageId?: number
+  length?: number
+}
+
+export interface IAuthPacket extends IPacket {
+  cmd: 'auth'
+  reasonCode: number,
+  properties?: {
+    authenticationMethod?: string,
+    authenticationData?: Buffer,
+    reasonString?: string,
+    userProperties?: UserProperties,
+  }
+}
+
+export interface IConnectPacket extends IPacket {
+  cmd: 'connect'
+  clientId: string
+  protocolVersion?: 4 | 5 | 3
+  protocolId?: 'MQTT' | 'MQIsdp'
+  clean?: boolean
+  keepalive?: number
+  username?: string
+  password?: Buffer
+  will?: {
+    topic: string
+    payload: Buffer | string
+    qos?: QoS
+    retain?: boolean
+    properties?: {
+      willDelayInterval?: number,
+      payloadFormatIndicator?: boolean,
+      messageExpiryInterval?: number,
+      contentType?: string,
+      responseTopic?: string,
+      correlationData?: Buffer,
+      userProperties?: UserProperties
+    }
+  }
+  properties?: {
+    sessionExpiryInterval?: number,
+    receiveMaximum?: number,
+    maximumPacketSize?: number,
+    topicAliasMaximum?: number,
+    requestResponseInformation?: boolean,
+    requestProblemInformation?: boolean,
+    userProperties?: UserProperties,
+    authenticationMethod?: string,
+    authenticationData?: Buffer
+  }
+}
+
+export interface IPublishPacket extends IPacket {
+  cmd: 'publish'
+  qos: QoS
+  dup: boolean
+  retain: boolean
+  topic: string
+  payload: string | Buffer
+  properties?: {
+    payloadFormatIndicator?: boolean,
+    messageExpiryInterval?: number,
+    topicAlias?: number,
+    responseTopic?: string,
+    correlationData?: Buffer,
+    userProperties?: UserProperties,
+    subscriptionIdentifier?: number | number[],
+    contentType?: string
+  }
+}
+
+export interface IConnackPacket extends IPacket {
+  cmd: 'connack'
+  returnCode?: number,
+  reasonCode?: number,
+  sessionPresent: boolean
+  properties?: {
+    sessionExpiryInterval?: number,
+    receiveMaximum?: number,
+    maximumQoS?: number,
+    retainAvailable?: boolean,
+    maximumPacketSize?: number,
+    assignedClientIdentifier?: string,
+    topicAliasMaximum?: number,
+    reasonString?: string,
+    userProperties?: UserProperties,
+    wildcardSubscriptionAvailable?: boolean,
+    subscriptionIdentifiersAvailable?: boolean,
+    sharedSubscriptionAvailable?: boolean,
+    serverKeepAlive?: number,
+    responseInformation?: string,
+    serverReference?: string,
+    authenticationMethod?: string,
+    authenticationData?: Buffer
+  }
+}
+
+export interface ISubscription {
+  topic: string
+  qos: QoS,
+  nl?: boolean,
+  rap?: boolean,
+  rh?: number
+}
+
+export interface ISubscribePacket extends IPacket {
+  cmd: 'subscribe'
+  subscriptions: ISubscription[],
+  properties?: {
+    reasonString?: string,
+    subscriptionIdentifier?: number,
+    userProperties?: UserProperties
+  }
+}
+
+export interface ISubackPacket extends IPacket {
+  cmd: 'suback',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  },
+  granted: number[] | Object[]
+}
+
+export interface IUnsubscribePacket extends IPacket {
+  cmd: 'unsubscribe',
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  },
+  unsubscriptions: string[]
+}
+
+export interface IUnsubackPacket extends IPacket {
+  cmd: 'unsuback',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  },
+  granted: number[]
+}
+
+export interface IPubackPacket extends IPacket {
+  cmd: 'puback',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPubcompPacket extends IPacket {
+  cmd: 'pubcomp',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPubrelPacket extends IPacket {
+  cmd: 'pubrel',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPubrecPacket extends IPacket {
+  cmd: 'pubrec',
+  reasonCode?: number,
+  properties?: {
+    reasonString?: string,
+    userProperties?: UserProperties
+  }
+}
+
+export interface IPingreqPacket extends IPacket {
+  cmd: 'pingreq'
+}
+
+export interface IPingrespPacket extends IPacket {
+  cmd: 'pingresp'
+}
+
+export interface IDisconnectPacket extends IPacket {
+  cmd: 'disconnect',
+  reasonCode?: number,
+  properties?: {
+    sessionExpiryInterval?: number,
+    reasonString?: string,
+    userProperties?: UserProperties,
+    serverReference?: string
+  }
+}
+
+export declare type Packet = IConnectPacket |
+  IPublishPacket |
+  IConnackPacket |
+  ISubscribePacket |
+  ISubackPacket |
+  IUnsubscribePacket |
+  IUnsubackPacket |
+  IPubackPacket |
+  IPubcompPacket |
+  IPubrelPacket |
+  IPingreqPacket |
+  IPingrespPacket |
+  IDisconnectPacket |
+  IPubrecPacket |
+  IAuthPacket
+
+export interface Parser extends EventEmitter {
+  on(event: 'packet', callback: (packet: Packet) => void): this
+
+  on(event: 'error', callback: (error: any) => void): this
+
+  parse(buffer: Buffer, opts?: Object): number
+}
+
+export declare function parser(opts?: Object): Parser
+
+export declare function generate(packet: Packet, opts?: Object): Buffer
+
+export declare function writeToStream(object: Packet, stream: WritableStream, opts?: Object): boolean
+
+export declare namespace writeToStream {
+  let cacheNumbers: boolean
+}
diff --git a/mqtt-backend/node_modules/mqtt-packet/writeToStream.js b/mqtt-backend/node_modules/mqtt-packet/writeToStream.js
new file mode 100644
index 0000000..59dcefe
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt-packet/writeToStream.js
@@ -0,0 +1,1129 @@
+const protocol = require('./constants')
+const { Buffer } = require('buffer')
+const empty = Buffer.allocUnsafe(0)
+const zeroBuf = Buffer.from([0])
+const numbers = require('./numbers')
+const nextTick = require('process-nextick-args').nextTick
+const debug = require('debug')('mqtt-packet:writeToStream')
+
+const numCache = numbers.cache
+const generateNumber = numbers.generateNumber
+const generateCache = numbers.generateCache
+const genBufVariableByteInt = numbers.genBufVariableByteInt
+const generate4ByteBuffer = numbers.generate4ByteBuffer
+let writeNumber = writeNumberCached
+let toGenerate = true
+
+function generate (packet, stream, opts) {
+  debug('generate called')
+  if (stream.cork) {
+    stream.cork()
+    nextTick(uncork, stream)
+  }
+
+  if (toGenerate) {
+    toGenerate = false
+    generateCache()
+  }
+  debug('generate: packet.cmd: %s', packet.cmd)
+  switch (packet.cmd) {
+    case 'connect':
+      return connect(packet, stream, opts)
+    case 'connack':
+      return connack(packet, stream, opts)
+    case 'publish':
+      return publish(packet, stream, opts)
+    case 'puback':
+    case 'pubrec':
+    case 'pubrel':
+    case 'pubcomp':
+      return confirmation(packet, stream, opts)
+    case 'subscribe':
+      return subscribe(packet, stream, opts)
+    case 'suback':
+      return suback(packet, stream, opts)
+    case 'unsubscribe':
+      return unsubscribe(packet, stream, opts)
+    case 'unsuback':
+      return unsuback(packet, stream, opts)
+    case 'pingreq':
+    case 'pingresp':
+      return emptyPacket(packet, stream, opts)
+    case 'disconnect':
+      return disconnect(packet, stream, opts)
+    case 'auth':
+      return auth(packet, stream, opts)
+    default:
+      stream.destroy(new Error('Unknown command'))
+      return false
+  }
+}
+/**
+ * Controls numbers cache.
+ * Set to "false" to allocate buffers on-the-flight instead of pre-generated cache
+ */
+Object.defineProperty(generate, 'cacheNumbers', {
+  get () {
+    return writeNumber === writeNumberCached
+  },
+  set (value) {
+    if (value) {
+      if (!numCache || Object.keys(numCache).length === 0) toGenerate = true
+      writeNumber = writeNumberCached
+    } else {
+      toGenerate = false
+      writeNumber = writeNumberGenerated
+    }
+  }
+})
+
+function uncork (stream) {
+  stream.uncork()
+}
+
+function connect (packet, stream, opts) {
+  const settings = packet || {}
+  const protocolId = settings.protocolId || 'MQTT'
+  let protocolVersion = settings.protocolVersion || 4
+  const will = settings.will
+  let clean = settings.clean
+  const keepalive = settings.keepalive || 0
+  const clientId = settings.clientId || ''
+  const username = settings.username
+  const password = settings.password
+  /* mqtt5 new oprions */
+  const properties = settings.properties
+
+  if (clean === undefined) clean = true
+
+  let length = 0
+
+  // Must be a string and non-falsy
+  if (!protocolId ||
+     (typeof protocolId !== 'string' && !Buffer.isBuffer(protocolId))) {
+    stream.destroy(new Error('Invalid protocolId'))
+    return false
+  } else length += protocolId.length + 2
+
+  // Must be 3 or 4 or 5
+  if (protocolVersion !== 3 && protocolVersion !== 4 && protocolVersion !== 5) {
+    stream.destroy(new Error('Invalid protocol version'))
+    return false
+  } else length += 1
+
+  // ClientId might be omitted in 3.1.1 and 5, but only if cleanSession is set to 1
+  if ((typeof clientId === 'string' || Buffer.isBuffer(clientId)) &&
+     (clientId || protocolVersion >= 4) && (clientId || clean)) {
+    length += Buffer.byteLength(clientId) + 2
+  } else {
+    if (protocolVersion < 4) {
+      stream.destroy(new Error('clientId must be supplied before 3.1.1'))
+      return false
+    }
+    if ((clean * 1) === 0) {
+      stream.destroy(new Error('clientId must be given if cleanSession set to 0'))
+      return false
+    }
+  }
+
+  // Must be a two byte number
+  if (typeof keepalive !== 'number' ||
+      keepalive < 0 ||
+      keepalive > 65535 ||
+      keepalive % 1 !== 0) {
+    stream.destroy(new Error('Invalid keepalive'))
+    return false
+  } else length += 2
+
+  // Connect flags
+  length += 1
+
+  let propertiesData
+  let willProperties
+
+  // Properties
+  if (protocolVersion === 5) {
+    propertiesData = getProperties(stream, properties)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // If will exists...
+  if (will) {
+    // It must be an object
+    if (typeof will !== 'object') {
+      stream.destroy(new Error('Invalid will'))
+      return false
+    }
+    // It must have topic typeof string
+    if (!will.topic || typeof will.topic !== 'string') {
+      stream.destroy(new Error('Invalid will topic'))
+      return false
+    } else {
+      length += Buffer.byteLength(will.topic) + 2
+    }
+
+    // Payload
+    length += 2 // payload length
+    if (will.payload) {
+      if (will.payload.length >= 0) {
+        if (typeof will.payload === 'string') {
+          length += Buffer.byteLength(will.payload)
+        } else {
+          length += will.payload.length
+        }
+      } else {
+        stream.destroy(new Error('Invalid will payload'))
+        return false
+      }
+    }
+    // will properties
+    willProperties = {}
+    if (protocolVersion === 5) {
+      willProperties = getProperties(stream, will.properties)
+      if (!willProperties) { return false }
+      length += willProperties.length
+    }
+  }
+
+  // Username
+  let providedUsername = false
+  if (username != null) {
+    if (isStringOrBuffer(username)) {
+      providedUsername = true
+      length += Buffer.byteLength(username) + 2
+    } else {
+      stream.destroy(new Error('Invalid username'))
+      return false
+    }
+  }
+
+  // Password
+  if (password != null) {
+    if (!providedUsername) {
+      stream.destroy(new Error('Username is required to use password'))
+      return false
+    }
+
+    if (isStringOrBuffer(password)) {
+      length += byteLength(password) + 2
+    } else {
+      stream.destroy(new Error('Invalid password'))
+      return false
+    }
+  }
+
+  // Generate header
+  stream.write(protocol.CONNECT_HEADER)
+
+  // Generate length
+  writeVarByteInt(stream, length)
+
+  // Generate protocol ID
+  writeStringOrBuffer(stream, protocolId)
+
+  if (settings.bridgeMode) {
+    protocolVersion += 128
+  }
+
+  stream.write(
+    protocolVersion === 131
+      ? protocol.VERSION131
+      : protocolVersion === 132
+        ? protocol.VERSION132
+        : protocolVersion === 4
+          ? protocol.VERSION4
+          : protocolVersion === 5
+            ? protocol.VERSION5
+            : protocol.VERSION3
+  )
+
+  // Connect flags
+  let flags = 0
+  flags |= (username != null) ? protocol.USERNAME_MASK : 0
+  flags |= (password != null) ? protocol.PASSWORD_MASK : 0
+  flags |= (will && will.retain) ? protocol.WILL_RETAIN_MASK : 0
+  flags |= (will && will.qos) ? will.qos << protocol.WILL_QOS_SHIFT : 0
+  flags |= will ? protocol.WILL_FLAG_MASK : 0
+  flags |= clean ? protocol.CLEAN_SESSION_MASK : 0
+
+  stream.write(Buffer.from([flags]))
+
+  // Keepalive
+  writeNumber(stream, keepalive)
+
+  // Properties
+  if (protocolVersion === 5) {
+    propertiesData.write()
+  }
+
+  // Client ID
+  writeStringOrBuffer(stream, clientId)
+
+  // Will
+  if (will) {
+    if (protocolVersion === 5) {
+      willProperties.write()
+    }
+    writeString(stream, will.topic)
+    writeStringOrBuffer(stream, will.payload)
+  }
+
+  // Username and password
+  if (username != null) {
+    writeStringOrBuffer(stream, username)
+  }
+  if (password != null) {
+    writeStringOrBuffer(stream, password)
+  }
+  // This is a small packet that happens only once on a stream
+  // We assume the stream is always free to receive more data after this
+  return true
+}
+
+function connack (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const rc = version === 5 ? settings.reasonCode : settings.returnCode
+  const properties = settings.properties
+  let length = 2 // length of rc and sessionHeader
+
+  // Check return code
+  if (typeof rc !== 'number') {
+    stream.destroy(new Error('Invalid return code'))
+    return false
+  }
+  // mqtt5 properties
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getProperties(stream, properties)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  stream.write(protocol.CONNACK_HEADER)
+  // length
+  writeVarByteInt(stream, length)
+  stream.write(settings.sessionPresent ? protocol.SESSIONPRESENT_HEADER : zeroBuf)
+
+  stream.write(Buffer.from([rc]))
+  if (propertiesData != null) {
+    propertiesData.write()
+  }
+  return true
+}
+
+function publish (packet, stream, opts) {
+  debug('publish: packet: %o', packet)
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const qos = settings.qos || 0
+  const retain = settings.retain ? protocol.RETAIN_MASK : 0
+  const topic = settings.topic
+  const payload = settings.payload || empty
+  const id = settings.messageId
+  const properties = settings.properties
+
+  let length = 0
+
+  // Topic must be a non-empty string or Buffer
+  if (typeof topic === 'string') length += Buffer.byteLength(topic) + 2
+  else if (Buffer.isBuffer(topic)) length += topic.length + 2
+  else {
+    stream.destroy(new Error('Invalid topic'))
+    return false
+  }
+
+  // Get the payload length
+  if (!Buffer.isBuffer(payload)) length += Buffer.byteLength(payload)
+  else length += payload.length
+
+  // Message ID must a number if qos > 0
+  if (qos && typeof id !== 'number') {
+    stream.destroy(new Error('Invalid messageId'))
+    return false
+  } else if (qos) length += 2
+
+  // mqtt5 properties
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getProperties(stream, properties)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // Header
+  stream.write(protocol.PUBLISH_HEADER[qos][settings.dup ? 1 : 0][retain ? 1 : 0])
+
+  // Remaining length
+  writeVarByteInt(stream, length)
+
+  // Topic
+  writeNumber(stream, byteLength(topic))
+  stream.write(topic)
+
+  // Message ID
+  if (qos > 0) writeNumber(stream, id)
+
+  // Properties
+  if (propertiesData != null) {
+    propertiesData.write()
+  }
+
+  // Payload
+  debug('publish: payload: %o', payload)
+  return stream.write(payload)
+}
+
+/* Puback, pubrec, pubrel and pubcomp */
+function confirmation (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const type = settings.cmd || 'puback'
+  const id = settings.messageId
+  const dup = (settings.dup && type === 'pubrel') ? protocol.DUP_MASK : 0
+  let qos = 0
+  const reasonCode = settings.reasonCode
+  const properties = settings.properties
+  let length = version === 5 ? 3 : 2
+
+  if (type === 'pubrel') qos = 1
+
+  // Check message ID
+  if (typeof id !== 'number') {
+    stream.destroy(new Error('Invalid messageId'))
+    return false
+  }
+
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    // Confirm should not add empty property length with no properties (rfc 3.4.2.2.1)
+    if (typeof properties === 'object') {
+      propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
+      if (!propertiesData) { return false }
+      length += propertiesData.length
+    }
+  }
+
+  // Header
+  stream.write(protocol.ACKS[type][qos][dup][0])
+
+  // Length === 3 is only true of version === 5 and no properties; therefore if reasonCode === 0 we are allowed to skip both bytes - but if we write the reason code we also have to write property length [MQTT-3.4.2-1].
+  if (length === 3) length += reasonCode !== 0 ? 1 : -1
+  writeVarByteInt(stream, length)
+
+  // Message ID
+  writeNumber(stream, id)
+
+  // reason code in header - but only if it couldn't be omitted - indicated by length !== 2.
+  if (version === 5 && length !== 2) {
+    stream.write(Buffer.from([reasonCode]))
+  }
+
+  // properties mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  } else {
+    if (length === 4) {
+      // we have no properties but have written a reason code - so we need to indicate empty properties by filling in a zero.
+      stream.write(Buffer.from([0]))
+    }
+  }
+  return true
+}
+
+function subscribe (packet, stream, opts) {
+  debug('subscribe: packet: ')
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const dup = settings.dup ? protocol.DUP_MASK : 0
+  const id = settings.messageId
+  const subs = settings.subscriptions
+  const properties = settings.properties
+
+  let length = 0
+
+  // Check message ID
+  if (typeof id !== 'number') {
+    stream.destroy(new Error('Invalid messageId'))
+    return false
+  } else length += 2
+
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getProperties(stream, properties)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // Check subscriptions
+  if (typeof subs === 'object' && subs.length) {
+    for (let i = 0; i < subs.length; i += 1) {
+      const itopic = subs[i].topic
+      const iqos = subs[i].qos
+
+      if (typeof itopic !== 'string') {
+        stream.destroy(new Error('Invalid subscriptions - invalid topic'))
+        return false
+      }
+      if (typeof iqos !== 'number') {
+        stream.destroy(new Error('Invalid subscriptions - invalid qos'))
+        return false
+      }
+
+      if (version === 5) {
+        const nl = subs[i].nl || false
+        if (typeof nl !== 'boolean') {
+          stream.destroy(new Error('Invalid subscriptions - invalid No Local'))
+          return false
+        }
+        const rap = subs[i].rap || false
+        if (typeof rap !== 'boolean') {
+          stream.destroy(new Error('Invalid subscriptions - invalid Retain as Published'))
+          return false
+        }
+        const rh = subs[i].rh || 0
+        if (typeof rh !== 'number' || rh > 2) {
+          stream.destroy(new Error('Invalid subscriptions - invalid Retain Handling'))
+          return false
+        }
+      }
+
+      length += Buffer.byteLength(itopic) + 2 + 1
+    }
+  } else {
+    stream.destroy(new Error('Invalid subscriptions'))
+    return false
+  }
+
+  // Generate header
+  debug('subscribe: writing to stream: %o', protocol.SUBSCRIBE_HEADER)
+  stream.write(protocol.SUBSCRIBE_HEADER[1][dup ? 1 : 0][0])
+
+  // Generate length
+  writeVarByteInt(stream, length)
+
+  // Generate message ID
+  writeNumber(stream, id)
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+
+  let result = true
+
+  // Generate subs
+  for (const sub of subs) {
+    const jtopic = sub.topic
+    const jqos = sub.qos
+    const jnl = +sub.nl
+    const jrap = +sub.rap
+    const jrh = sub.rh
+    let joptions
+
+    // Write topic string
+    writeString(stream, jtopic)
+
+    // options process
+    joptions = protocol.SUBSCRIBE_OPTIONS_QOS[jqos]
+    if (version === 5) {
+      joptions |= jnl ? protocol.SUBSCRIBE_OPTIONS_NL : 0
+      joptions |= jrap ? protocol.SUBSCRIBE_OPTIONS_RAP : 0
+      joptions |= jrh ? protocol.SUBSCRIBE_OPTIONS_RH[jrh] : 0
+    }
+    // Write options
+    result = stream.write(Buffer.from([joptions]))
+  }
+
+  return result
+}
+
+function suback (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const id = settings.messageId
+  const granted = settings.granted
+  const properties = settings.properties
+  let length = 0
+
+  // Check message ID
+  if (typeof id !== 'number') {
+    stream.destroy(new Error('Invalid messageId'))
+    return false
+  } else length += 2
+
+  // Check granted qos vector
+  if (typeof granted === 'object' && granted.length) {
+    for (let i = 0; i < granted.length; i += 1) {
+      if (typeof granted[i] !== 'number') {
+        stream.destroy(new Error('Invalid qos vector'))
+        return false
+      }
+      length += 1
+    }
+  } else {
+    stream.destroy(new Error('Invalid qos vector'))
+    return false
+  }
+
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // header
+  stream.write(protocol.SUBACK_HEADER)
+
+  // Length
+  writeVarByteInt(stream, length)
+
+  // Message ID
+  writeNumber(stream, id)
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+
+  return stream.write(Buffer.from(granted))
+}
+
+function unsubscribe (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const id = settings.messageId
+  const dup = settings.dup ? protocol.DUP_MASK : 0
+  const unsubs = settings.unsubscriptions
+  const properties = settings.properties
+
+  let length = 0
+
+  // Check message ID
+  if (typeof id !== 'number') {
+    stream.destroy(new Error('Invalid messageId'))
+    return false
+  } else {
+    length += 2
+  }
+  // Check unsubs
+  if (typeof unsubs === 'object' && unsubs.length) {
+    for (let i = 0; i < unsubs.length; i += 1) {
+      if (typeof unsubs[i] !== 'string') {
+        stream.destroy(new Error('Invalid unsubscriptions'))
+        return false
+      }
+      length += Buffer.byteLength(unsubs[i]) + 2
+    }
+  } else {
+    stream.destroy(new Error('Invalid unsubscriptions'))
+    return false
+  }
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getProperties(stream, properties)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // Header
+  stream.write(protocol.UNSUBSCRIBE_HEADER[1][dup ? 1 : 0][0])
+
+  // Length
+  writeVarByteInt(stream, length)
+
+  // Message ID
+  writeNumber(stream, id)
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+
+  // Unsubs
+  let result = true
+  for (let j = 0; j < unsubs.length; j++) {
+    result = writeString(stream, unsubs[j])
+  }
+
+  return result
+}
+
+function unsuback (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const id = settings.messageId
+  const dup = settings.dup ? protocol.DUP_MASK : 0
+  const granted = settings.granted
+  const properties = settings.properties
+  const type = settings.cmd
+  const qos = 0
+
+  let length = 2
+
+  // Check message ID
+  if (typeof id !== 'number') {
+    stream.destroy(new Error('Invalid messageId'))
+    return false
+  }
+
+  // Check granted
+  if (version === 5) {
+    if (typeof granted === 'object' && granted.length) {
+      for (let i = 0; i < granted.length; i += 1) {
+        if (typeof granted[i] !== 'number') {
+          stream.destroy(new Error('Invalid qos vector'))
+          return false
+        }
+        length += 1
+      }
+    } else {
+      stream.destroy(new Error('Invalid qos vector'))
+      return false
+    }
+  }
+
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // Header
+  stream.write(protocol.ACKS[type][qos][dup][0])
+
+  // Length
+  writeVarByteInt(stream, length)
+
+  // Message ID
+  writeNumber(stream, id)
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+
+  // payload
+  if (version === 5) {
+    stream.write(Buffer.from(granted))
+  }
+  return true
+}
+
+function emptyPacket (packet, stream, opts) {
+  return stream.write(protocol.EMPTY[packet.cmd])
+}
+
+function disconnect (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const reasonCode = settings.reasonCode
+  const properties = settings.properties
+  let length = version === 5 ? 1 : 0
+
+  // properies mqtt 5
+  let propertiesData = null
+  if (version === 5) {
+    propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
+    if (!propertiesData) { return false }
+    length += propertiesData.length
+  }
+
+  // Header
+  stream.write(Buffer.from([protocol.codes.disconnect << 4]))
+
+  // Length
+  writeVarByteInt(stream, length)
+
+  // reason code in header
+  if (version === 5) {
+    stream.write(Buffer.from([reasonCode]))
+  }
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+
+  return true
+}
+
+function auth (packet, stream, opts) {
+  const version = opts ? opts.protocolVersion : 4
+  const settings = packet || {}
+  const reasonCode = settings.reasonCode
+  const properties = settings.properties
+  let length = version === 5 ? 1 : 0
+
+  if (version !== 5) stream.destroy(new Error('Invalid mqtt version for auth packet'))
+
+  // properies mqtt 5
+  const propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
+  if (!propertiesData) { return false }
+  length += propertiesData.length
+
+  // Header
+  stream.write(Buffer.from([protocol.codes.auth << 4]))
+
+  // Length
+  writeVarByteInt(stream, length)
+
+  // reason code in header
+  stream.write(Buffer.from([reasonCode]))
+
+  // properies mqtt 5
+  if (propertiesData !== null) {
+    propertiesData.write()
+  }
+  return true
+}
+
+/**
+ * writeVarByteInt - write an MQTT style variable byte integer to the buffer
+ *
+ * @param <Buffer> buffer - destination
+ * @param <Number> pos - offset
+ * @param <Number> length - length (>0)
+ * @returns <Number> number of bytes written
+ *
+ * @api private
+ */
+
+const varByteIntCache = {}
+function writeVarByteInt (stream, num) {
+  if (num > protocol.VARBYTEINT_MAX) {
+    stream.destroy(new Error(`Invalid variable byte integer: ${num}`))
+    return false
+  }
+
+  let buffer = varByteIntCache[num]
+
+  if (!buffer) {
+    buffer = genBufVariableByteInt(num)
+    if (num < 16384) varByteIntCache[num] = buffer
+  }
+  debug('writeVarByteInt: writing to stream: %o', buffer)
+  return stream.write(buffer)
+}
+
+/**
+ * writeString - write a utf8 string to the buffer
+ *
+ * @param <Buffer> buffer - destination
+ * @param <Number> pos - offset
+ * @param <String> string - string to write
+ * @return <Number> number of bytes written
+ *
+ * @api private
+ */
+
+function writeString (stream, string) {
+  const strlen = Buffer.byteLength(string)
+  writeNumber(stream, strlen)
+
+  debug('writeString: %s', string)
+  return stream.write(string, 'utf8')
+}
+
+/**
+ * writeStringPair - write a utf8 string pairs to the buffer
+ *
+ * @param <Buffer> buffer - destination
+ * @param <String> name - string name to write
+ * @param <String> value - string value to write
+ * @return <Number> number of bytes written
+ *
+ * @api private
+ */
+function writeStringPair (stream, name, value) {
+  writeString(stream, name)
+  writeString(stream, value)
+}
+
+/**
+ * writeNumber - write a two byte number to the buffer
+ *
+ * @param <Buffer> buffer - destination
+ * @param <Number> pos - offset
+ * @param <String> number - number to write
+ * @return <Number> number of bytes written
+ *
+ * @api private
+ */
+function writeNumberCached (stream, number) {
+  debug('writeNumberCached: number: %d', number)
+  debug('writeNumberCached: %o', numCache[number])
+  return stream.write(numCache[number])
+}
+function writeNumberGenerated (stream, number) {
+  const generatedNumber = generateNumber(number)
+  debug('writeNumberGenerated: %o', generatedNumber)
+  return stream.write(generatedNumber)
+}
+function write4ByteNumber (stream, number) {
+  const generated4ByteBuffer = generate4ByteBuffer(number)
+  debug('write4ByteNumber: %o', generated4ByteBuffer)
+  return stream.write(generated4ByteBuffer)
+}
+/**
+ * writeStringOrBuffer - write a String or Buffer with the its length prefix
+ *
+ * @param <Buffer> buffer - destination
+ * @param <Number> pos - offset
+ * @param <String> toWrite - String or Buffer
+ * @return <Number> number of bytes written
+ */
+function writeStringOrBuffer (stream, toWrite) {
+  if (typeof toWrite === 'string') {
+    writeString(stream, toWrite)
+  } else if (toWrite) {
+    writeNumber(stream, toWrite.length)
+    stream.write(toWrite)
+  } else writeNumber(stream, 0)
+}
+
+function getProperties (stream, properties) {
+  /* connect properties */
+  if (typeof properties !== 'object' || properties.length != null) {
+    return {
+      length: 1,
+      write () {
+        writeProperties(stream, {}, 0)
+      }
+    }
+  }
+  let propertiesLength = 0
+  function getLengthProperty (name, value) {
+    const type = protocol.propertiesTypes[name]
+    let length = 0
+    switch (type) {
+      case 'byte': {
+        if (typeof value !== 'boolean') {
+          stream.destroy(new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + 1
+        break
+      }
+      case 'int8': {
+        if (typeof value !== 'number' || value < 0 || value > 0xff) {
+          stream.destroy(new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + 1
+        break
+      }
+      case 'binary': {
+        if (value && value === null) {
+          stream.destroy(new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + Buffer.byteLength(value) + 2
+        break
+      }
+      case 'int16': {
+        if (typeof value !== 'number' || value < 0 || value > 0xffff) {
+          stream.destroy(new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + 2
+        break
+      }
+      case 'int32': {
+        if (typeof value !== 'number' || value < 0 || value > 0xffffffff) {
+          stream.destroy(new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + 4
+        break
+      }
+      case 'var': {
+        // var byte integer is max 24 bits packed in 32 bits
+        if (typeof value !== 'number' || value < 0 || value > 0x0fffffff) {
+          stream.destroy(new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + Buffer.byteLength(genBufVariableByteInt(value))
+        break
+      }
+      case 'string': {
+        if (typeof value !== 'string') {
+          stream.destroy(new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += 1 + 2 + Buffer.byteLength(value.toString())
+        break
+      }
+      case 'pair': {
+        if (typeof value !== 'object') {
+          stream.destroy(new Error(`Invalid ${name}: ${value}`))
+          return false
+        }
+        length += Object.getOwnPropertyNames(value).reduce((result, name) => {
+          const currentValue = value[name]
+          if (Array.isArray(currentValue)) {
+            result += currentValue.reduce((currentLength, value) => {
+              currentLength += 1 + 2 + Buffer.byteLength(name.toString()) + 2 + Buffer.byteLength(value.toString())
+              return currentLength
+            }, 0)
+          } else {
+            result += 1 + 2 + Buffer.byteLength(name.toString()) + 2 + Buffer.byteLength(value[name].toString())
+          }
+          return result
+        }, 0)
+        break
+      }
+      default: {
+        stream.destroy(new Error(`Invalid property ${name}: ${value}`))
+        return false
+      }
+    }
+    return length
+  }
+  if (properties) {
+    for (const propName in properties) {
+      let propLength = 0
+      let propValueLength = 0
+      const propValue = properties[propName]
+      if (propValue === undefined) {
+        continue
+      } else if (Array.isArray(propValue)) {
+        for (let valueIndex = 0; valueIndex < propValue.length; valueIndex++) {
+          propValueLength = getLengthProperty(propName, propValue[valueIndex])
+          if (!propValueLength) { return false }
+          propLength += propValueLength
+        }
+      } else {
+        propValueLength = getLengthProperty(propName, propValue)
+        if (!propValueLength) { return false }
+        propLength = propValueLength
+      }
+      if (!propLength) return false
+      propertiesLength += propLength
+    }
+  }
+  const propertiesLengthLength = Buffer.byteLength(genBufVariableByteInt(propertiesLength))
+
+  return {
+    length: propertiesLengthLength + propertiesLength,
+    write () {
+      writeProperties(stream, properties, propertiesLength)
+    }
+  }
+}
+
+function getPropertiesByMaximumPacketSize (stream, properties, opts, length) {
+  const mayEmptyProps = ['reasonString', 'userProperties']
+  const maximumPacketSize = opts && opts.properties && opts.properties.maximumPacketSize ? opts.properties.maximumPacketSize : 0
+
+  let propertiesData = getProperties(stream, properties)
+  if (maximumPacketSize) {
+    while (length + propertiesData.length > maximumPacketSize) {
+      const currentMayEmptyProp = mayEmptyProps.shift()
+      if (currentMayEmptyProp && properties[currentMayEmptyProp]) {
+        delete properties[currentMayEmptyProp]
+        propertiesData = getProperties(stream, properties)
+      } else {
+        return false
+      }
+    }
+  }
+  return propertiesData
+}
+
+function writeProperty (stream, propName, value) {
+  const type = protocol.propertiesTypes[propName]
+  switch (type) {
+    case 'byte': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      stream.write(Buffer.from([+value]))
+      break
+    }
+    case 'int8': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      stream.write(Buffer.from([value]))
+      break
+    }
+    case 'binary': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      writeStringOrBuffer(stream, value)
+      break
+    }
+    case 'int16': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      writeNumber(stream, value)
+      break
+    }
+    case 'int32': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      write4ByteNumber(stream, value)
+      break
+    }
+    case 'var': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      writeVarByteInt(stream, value)
+      break
+    }
+    case 'string': {
+      stream.write(Buffer.from([protocol.properties[propName]]))
+      writeString(stream, value)
+      break
+    }
+    case 'pair': {
+      Object.getOwnPropertyNames(value).forEach(name => {
+        const currentValue = value[name]
+        if (Array.isArray(currentValue)) {
+          currentValue.forEach(value => {
+            stream.write(Buffer.from([protocol.properties[propName]]))
+            writeStringPair(stream, name.toString(), value.toString())
+          })
+        } else {
+          stream.write(Buffer.from([protocol.properties[propName]]))
+          writeStringPair(stream, name.toString(), currentValue.toString())
+        }
+      })
+      break
+    }
+    default: {
+      stream.destroy(new Error(`Invalid property ${propName} value: ${value}`))
+      return false
+    }
+  }
+}
+
+function writeProperties (stream, properties, propertiesLength) {
+  /* write properties to stream */
+  writeVarByteInt(stream, propertiesLength)
+  for (const propName in properties) {
+    if (Object.prototype.hasOwnProperty.call(properties, propName) && properties[propName] != null) {
+      const value = properties[propName]
+      if (Array.isArray(value)) {
+        for (let valueIndex = 0; valueIndex < value.length; valueIndex++) {
+          writeProperty(stream, propName, value[valueIndex])
+        }
+      } else {
+        writeProperty(stream, propName, value)
+      }
+    }
+  }
+}
+
+function byteLength (bufOrString) {
+  if (!bufOrString) return 0
+  else if (bufOrString instanceof Buffer) return bufOrString.length
+  else return Buffer.byteLength(bufOrString)
+}
+
+function isStringOrBuffer (field) {
+  return typeof field === 'string' || field instanceof Buffer
+}
+
+module.exports = generate
diff --git a/mqtt-backend/node_modules/mqtt/CONTRIBUTING.md b/mqtt-backend/node_modules/mqtt/CONTRIBUTING.md
new file mode 100644
index 0000000..188d8c7
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt/CONTRIBUTING.md
@@ -0,0 +1,27 @@
+# MQTT.js is an OPEN Open Source Project
+
+-----------------------------------------
+
+## What?
+
+Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.
+
+## Rules
+
+There are a few basic ground-rules for contributors:
+
+1. **No `--force` pushes** or modifying the Git history in any way.
+1. **Non-main branches** ought to be used for ongoing work.
+1. **External API changes and significant modifications** ought to be subject to an **internal pull-request** to solicit feedback from other contributors.
+1. Internal pull-requests to solicit feedback are *encouraged* for any other non-trivial contribution but left to the discretion of the contributor.
+1. Contributors should attempt to adhere to the prevailing code-style.
+
+## Releases
+
+Declaring formal releases remains the prerogative of the project maintainer.
+
+## Changes to this arrangement
+
+This is an experiment and feedback is welcome! This document may also be subject to pull-requests or changes by contributors where you believe you have something valuable to add or change.
+
+-----------------------------------------
diff --git a/mqtt-backend/node_modules/mqtt/LICENSE.md b/mqtt-backend/node_modules/mqtt/LICENSE.md
new file mode 100644
index 0000000..d23ded9
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt/LICENSE.md
@@ -0,0 +1,15 @@
+The MIT License (MIT)
+=====================
+
+Copyright (c) 2015-2016 MQTT.js contributors
+---------------------------------------
+
+*MQTT.js contributors listed at <https://github.com/mqttjs/MQTT.js#contributors>*
+
+Copyright 2011-2014 by Adam Rudd
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/mqtt/README.md b/mqtt-backend/node_modules/mqtt/README.md
new file mode 100644
index 0000000..d1f4d80
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt/README.md
@@ -0,0 +1,977 @@
+# ![mqtt.js](https://raw.githubusercontent.com/mqttjs/MQTT.js/137ee0e3940c1f01049a30248c70f24dc6e6f829/MQTT.js.png)
+
+![Github Test Status](https://github.com/mqttjs/MQTT.js/workflows/MQTT.js%20CI/badge.svg) [![codecov](https://codecov.io/gh/mqttjs/MQTT.js/branch/master/graph/badge.svg)](https://codecov.io/gh/mqttjs/MQTT.js)
+
+[![Maintenance](https://img.shields.io/badge/Maintained%3F-yes-green.svg)](https://github.com/mqttjs/MQTT.js/graphs/commit-activity)
+[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/mqttjs/MQTT.js/pulls)
+
+[![node](https://img.shields.io/node/v/mqtt.svg) ![npm](https://img.shields.io/npm/v/mqtt.svg?logo=npm)](https://www.npmjs.com/package/mqtt)
+[![NPM Downloads](https://img.shields.io/npm/dm/mqtt.svg)](https://npm-compare.com/mqtt/#timeRange=THREE_YEARS)
+
+MQTT.js is a client library for the [MQTT](http://mqtt.org/) protocol, written
+in JavaScript for node.js and the browser.
+
+## Table of Contents
+
+- [Upgrade notes](#notes)
+- [Installation](#install)
+- [Example](#example)
+- [React Native](#react-native)
+- [Import Styles](#example)
+- [Command Line Tools](#cli)
+- [API](#api)
+- [Browser](#browser)
+- [About QoS](#qos)
+- [TypeScript](#typescript)
+- [Weapp and Ali support](#weapp-alipay)
+- [Contributing](#contributing)
+- [Sponsor](#sponsor)
+- [License](#license)
+
+MQTT.js is an OPEN Open Source Project, see the [Contributing](#contributing) section to find out what this means.
+
+[![JavaScript Style
+Guide](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard)
+
+<a name="notes"></a>
+
+## Important notes for existing users
+
+**v5.0.0** (07/2023)
+
+- Removes support for all end of life node versions (v12 and v14), and now supports node v18 and v20.
+- Completely rewritten in Typescript 🚀.
+- When creating `MqttClient` instance `new` is now required.
+
+**v4.0.0** (Released 04/2020) removes support for all end of life node versions, and now supports node v12 and v14. It also adds improvements to
+debug logging, along with some feature additions.
+
+As a **breaking change**, by default a error handler is built into the MQTT.js client, so if any
+errors are emitted and the user has not created an event handler on the client for errors, the client will
+not break as a result of unhandled errors. Additionally, typical TLS errors like `ECONNREFUSED`, `ECONNRESET` have been
+added to a list of TLS errors that will be emitted from the MQTT.js client, and so can be handled as connection errors.
+
+**v3.0.0** adds support for MQTT 5, support for node v10.x, and many fixes to improve reliability.
+
+**Note:** MQTT v5 support is experimental as it has not been implemented by brokers yet.
+
+**v2.0.0** removes support for node v0.8, v0.10 and v0.12, and it is 3x faster in sending
+packets. It also removes all the deprecated functionality in v1.0.0,
+mainly `mqtt.createConnection` and `mqtt.Server`. From v2.0.0,
+subscriptions are restored upon reconnection if `clean: true`.
+v1.x.x is now in _LTS_, and it will keep being supported as long as
+there are v0.8, v0.10 and v0.12 users.
+
+As a **breaking change**, the `encoding` option in the old client is
+removed, and now everything is UTF-8 with the exception of the
+`password` in the CONNECT message and `payload` in the PUBLISH message,
+which are `Buffer`.
+
+Another **breaking change** is that MQTT.js now defaults to MQTT v3.1.1,
+so to support old brokers, please read the [client options doc](#client).
+
+**v1.0.0** improves the overall architecture of the project, which is now
+split into three components: MQTT.js keeps the Client,
+[mqtt-connection](http://npm.im/mqtt-connection) includes the barebone
+Connection code for server-side usage, and [mqtt-packet](http://npm.im/mqtt-packet)
+includes the protocol parser and generator. The new Client improves
+performance by a 30% factor, embeds Websocket support
+([MOWS](http://npm.im/mows) is now deprecated), and it has a better
+support for QoS 1 and 2. The previous API is still supported but
+deprecated, as such, it is not documented in this README.
+
+<a name="install"></a>
+
+## Installation
+
+```sh
+npm install mqtt --save
+```
+
+<a name="example"></a>
+
+## Example
+
+For the sake of simplicity, let's put the subscriber and the publisher in the same file:
+
+```js
+const mqtt = require("mqtt");
+const client = mqtt.connect("mqtt://test.mosquitto.org");
+
+client.on("connect", () => {
+  client.subscribe("presence", (err) => {
+    if (!err) {
+      client.publish("presence", "Hello mqtt");
+    }
+  });
+});
+
+client.on("message", (topic, message) => {
+  // message is Buffer
+  console.log(message.toString());
+  client.end();
+});
+```
+
+output:
+
+```sh
+Hello mqtt
+```
+
+<a name="example-react-native"></a>
+
+### React Native
+
+MQTT.js can be used in React Native applications. To use it, see the [React Native example](https://github.com/MaximoLiberata/react-native-mqtt.js-example)
+
+If you want to run your own MQTT broker, you can use
+[Mosquitto](http://mosquitto.org) or
+[Aedes-cli](https://github.com/moscajs/aedes-cli), and launch it.
+
+You can also use a test instance: test.mosquitto.org.
+
+If you do not want to install a separate broker, you can try using the
+[Aedes](https://github.com/moscajs/aedes).
+
+<a name="import_styles"></a>
+
+## Import styles
+
+### CommonJS (Require)
+
+```js
+const mqtt = require("mqtt")  // require mqtt
+const client = mqtt.connect("mqtt://test.mosquitto.org")  // create a client
+```
+
+### ES6 Modules (Import)
+
+#### Default import
+
+```js
+import mqtt from "mqtt"; // import namespace "mqtt"
+let client = mqtt.connect("mqtt://test.mosquitto.org"); // create a client
+```
+
+#### Importing individual components
+
+```js
+import { connect } from "mqtt"; // import connect from mqtt
+let client = connect("mqtt://test.mosquitto.org"); // create a client
+```
+
+<a name="cli"></a>
+
+## Command Line Tools
+
+MQTT.js bundles a command to interact with a broker.
+In order to have it available on your path, you should install MQTT.js
+globally:
+
+```sh
+npm install mqtt -g
+```
+
+Then, on one terminal
+
+```sh
+mqtt sub -t 'hello' -h 'test.mosquitto.org' -v
+```
+
+On another
+
+```sh
+mqtt pub -t 'hello' -h 'test.mosquitto.org' -m 'from MQTT.js'
+```
+
+See `mqtt help <command>` for the command help.
+
+<a name="debug"></a>
+
+## Debug Logs
+
+MQTT.js uses the [debug](https://www.npmjs.com/package/debug#cmd) package for debugging purposes. To enable debug logs, add the following environment variable on runtime :
+
+```ps
+# (example using PowerShell, the VS Code default)
+$env:DEBUG='mqttjs*'
+```
+
+<a name="reconnecting"></a>
+
+## About Reconnection
+
+An important part of any websocket connection is what to do when a connection
+drops off and the client needs to reconnect. MQTT has built-in reconnection
+support that can be configured to behave in ways that suit the application.
+
+#### Refresh Authentication Options / Signed Urls with `transformWsUrl` (Websocket Only)
+
+When an mqtt connection drops and needs to reconnect, it's common to require
+that any authentication associated with the connection is kept current with
+the underlying auth mechanism. For instance some applications may pass an auth
+token with connection options on the initial connection, while other cloud
+services may require a url be signed with each connection.
+
+By the time the reconnect happens in the application lifecycle, the original
+auth data may have expired.
+
+To address this we can use a hook called `transformWsUrl` to manipulate
+either of the connection url or the client options at the time of a reconnect.
+
+Example (update clientId & username on each reconnect):
+
+```js
+    const transformWsUrl = (url, options, client) => {
+      client.options.username = `token=${this.get_current_auth_token()}`;
+      client.options.clientId = `${this.get_updated_clientId()}`;
+
+      return `${this.get_signed_cloud_url(url)}`;
+    }
+
+    const connection = await mqtt.connectAsync(<wss url>, {
+      ...,
+      transformWsUrl: transformUrl,
+    });
+
+```
+
+Now every time a new WebSocket connection is opened (hopefully not too often),
+we will get a fresh signed url or fresh auth token data.
+
+Note: Currently this hook does _not_ support promises, meaning that in order to
+use the latest auth token, you must have some outside mechanism running that
+handles application-level authentication refreshing so that the websocket
+connection can simply grab the latest valid token or signed url.
+
+#### Customize Websockets with `createWebsocket` (Websocket Only)
+
+When you need to add a custom websocket subprotocol or header to open a connection
+through a proxy with custom authentication this callback allows you to create your own
+instance of a websocket which will be used in the mqtt client.
+
+```js
+  const createWebsocket = (url, websocketSubProtocols, options) => {
+    const subProtocols = [
+      websocketSubProtocols[0],
+      'myCustomSubprotocolOrOAuthToken',
+    ]
+    return new WebSocket(url, subProtocols)
+  }
+
+  const client = await mqtt.connectAsync(<wss url>, {
+    ...,
+    createWebsocket: createWebsocket,
+  });
+```
+
+#### Enabling Reconnection with `reconnectPeriod` option
+
+To ensure that the mqtt client automatically tries to reconnect when the
+connection is dropped, you must set the client option `reconnectPeriod` to a
+value greater than 0. A value of 0 will disable reconnection and then terminate
+the final connection when it drops.
+
+The default value is 1000 ms which means it will try to reconnect 1 second
+after losing the connection.
+
+Note that this will only enable reconnects after either a connection timeout, or
+after a successful connection. It will _not_ (by default) enable retrying
+connections that are actively denied with a CONNACK error by the server.
+
+To also enable automatic reconnects for CONNACK errors, set
+`reconnectOnConnackError: true`.
+
+<a name="topicalias"></a>
+
+## About Topic Alias Management
+
+### Enabling automatic Topic Alias using
+
+If the client sets the option `autoUseTopicAlias:true` then MQTT.js uses existing topic alias automatically.
+
+example scenario:
+
+```bash
+1. PUBLISH topic:'t1', ta:1                   (register)
+2. PUBLISH topic:'t1'       -> topic:'', ta:1 (auto use existing map entry)
+3. PUBLISH topic:'t2', ta:1                   (register overwrite)
+4. PUBLISH topic:'t2'       -> topic:'', ta:1 (auto use existing map entry based on the receent map)
+5. PUBLISH topic:'t1'                         (t1 is no longer mapped to ta:1)
+```
+
+User doesn't need to manage which topic is mapped to which topic alias.
+If the user want to register topic alias, then publish topic with topic alias.
+If the user want to use topic alias, then publish topic without topic alias. If there is a mapped topic alias then added it as a property and update the topic to empty string.
+
+### Enabling automatic Topic Alias assign
+
+If the client sets the option `autoAssignTopicAlias:true` then MQTT.js uses existing topic alias automatically.
+If no topic alias exists, then assign a new vacant topic alias automatically. If topic alias is fully used, then LRU(Least Recently Used) topic-alias entry is overwritten.
+
+example scenario:
+
+```bash
+The broker returns CONNACK (TopicAliasMaximum:3)
+1. PUBLISH topic:'t1' -> 't1', ta:1 (auto assign t1:1 and register)
+2. PUBLISH topic:'t1' -> ''  , ta:1 (auto use existing map entry)
+3. PUBLISH topic:'t2' -> 't2', ta:2 (auto assign t1:2 and register. 2 was vacant)
+4. PUBLISH topic:'t3' -> 't3', ta:3 (auto assign t1:3 and register. 3 was vacant)
+5. PUBLISH topic:'t4' -> 't4', ta:1 (LRU entry is overwritten)
+```
+
+Also user can manually register topic-alias pair using PUBLISH topic:'some', ta:X. It works well with automatic topic alias assign.
+
+<a name="api"></a>
+
+## API
+
+- [`mqtt.connect()`](#connect)
+- [`mqtt.connectAsync()`](#connect-async)
+- [`mqtt.Client()`](#client)
+- [`mqtt.Client#connect()`](#client-connect)
+- [`mqtt.Client#publish()`](#publish)
+- [`mqtt.Client#publishAsync()`](#publish-async)
+- [`mqtt.Client#subscribe()`](#subscribe)
+- [`mqtt.Client#subscribeAsync()`](#subscribe-async)
+- [`mqtt.Client#unsubscribe()`](#unsubscribe)
+- [`mqtt.Client#unsubscribeAsync()`](#unsubscribe-async)
+- [`mqtt.Client#end()`](#end)
+- [`mqtt.Client#endAsync()`](#end-async)
+- [`mqtt.Client#removeOutgoingMessage()`](#removeOutgoingMessage)
+- [`mqtt.Client#reconnect()`](#reconnect)
+- [`mqtt.Client#handleMessage()`](#handleMessage)
+- [`mqtt.Client#connected`](#connected)
+- [`mqtt.Client#reconnecting`](#reconnecting)
+- [`mqtt.Client#getLastMessageId()`](#getLastMessageId)
+- [`mqtt.Store()`](#store)
+- [`mqtt.Store#put()`](#put)
+- [`mqtt.Store#del()`](#del)
+- [`mqtt.Store#createStream()`](#createStream)
+- [`mqtt.Store#close()`](#close)
+
+---
+
+<a name="connect"></a>
+
+### mqtt.connect([url], options)
+
+Connects to the broker specified by the given url and options and
+returns a [Client](#client).
+
+The URL can be on the following protocols: 'mqtt', 'mqtts', 'tcp',
+'tls', 'ws', 'wss', 'wxs', 'alis'. If you are trying to connect to a unix socket just append the `+unix` suffix to the protocol (ex: `mqtt+unix`). This will set the `unixSocket` property automatically.
+
+The URL can also be an object as returned by
+[`URL.parse()`](http://nodejs.org/api/url.html#url_url_parse_urlstr_parsequerystring_slashesdenotehost),
+in that case the two objects are merged, i.e. you can pass a single
+object with both the URL and the connect options.
+
+You can also specify a `servers` options with content: `[{ host:
+'localhost', port: 1883 }, ... ]`, in that case that array is iterated
+at every connect.
+
+For all MQTT-related options, see the [Client](#client)
+constructor.
+
+<a name="connect-async"></a>
+
+### connectAsync([url], options)
+
+Asynchronous wrapper around the [`connect`](#connect) function.
+
+Returns a `Promise` that resolves to a `mqtt.Client` instance when the client
+fires a `'connect'` or `'end'` event, or rejects with an error if the `'error'`
+is fired.
+
+Note that the `manualConnect` option will cause the promise returned by this
+function to never resolve or reject as the underlying client never fires any
+events.
+
+---
+
+<a name="client"></a>
+
+### mqtt.Client(streamBuilder, options)
+
+The `Client` class wraps a client connection to an
+MQTT broker over an arbitrary transport method (TCP, TLS,
+WebSocket, ecc).
+`Client` is an [EventEmitter](https://nodejs.org/en/learn/asynchronous-work/the-nodejs-event-emitter) that has it's own [events](#events)
+
+`Client` automatically handles the following:
+
+- Regular server pings
+- QoS flow
+- Automatic reconnections
+- Start publishing before being connected
+
+The arguments are:
+
+- `streamBuilder` is a function that returns a subclass of the `Stream` class that supports
+  the `connect` event. Typically a `net.Socket`.
+- `options` is the client connection options (see: the [connect packet](https://github.com/mcollina/mqtt-packet#connect)). Defaults:
+  - `wsOptions`: is the WebSocket connection options. Default is `{}`.
+    It's specific for WebSockets. For possible options have a look at: <https://github.com/websockets/ws/blob/master/doc/ws.md>.
+  - `keepalive`: `60` seconds, set to `0` to disable
+  - `reschedulePings`: reschedule ping messages after sending packets (default `true`)
+  - `clientId`: `'mqttjs_' + Math.random().toString(16).substr(2, 8)`
+  - `protocolId`: `'MQTT'`
+  - `protocolVersion`: `4`
+  - `clean`: `true`, set to false to receive QoS 1 and 2 messages while
+    offline
+  - `reconnectPeriod`: `1000` milliseconds, interval between two
+    reconnections. Disable auto reconnect by setting to `0`.
+  - `reconnectOnConnackError`: `false`, whether to also reconnect if a CONNACK
+    is received with an error.
+  - `connectTimeout`: `30 * 1000` milliseconds, time to wait before a
+    CONNACK is received
+  - `username`: the username required by your broker, if any
+  - `password`: the password required by your broker, if any
+  - `socksProxy`: establish TCP and TLS connections via a socks proxy (URL, supported protocols are `socks5://`, `socks5h://`, `socks4://`, `socks4a://`)
+  - `socksTimeout`: timeout for connecting to the socks proxy
+  - `incomingStore`: a [Store](#store) for the incoming packets
+  - `outgoingStore`: a [Store](#store) for the outgoing packets
+  - `queueQoSZero`: if connection is broken, queue outgoing QoS zero messages (default `true`)
+  - `customHandleAcks`: MQTT 5 feature of custom handling puback and pubrec packets. Its callback:
+
+    ```js
+      customHandleAcks: function(topic, message, packet, done) {/*some logic with calling done(error, reasonCode)*/}
+    ```
+
+  - `autoUseTopicAlias`: enabling automatic Topic Alias using functionality
+  - `autoAssignTopicAlias`: enabling automatic Topic Alias assign functionality
+  - `properties`: properties MQTT 5.0.
+    `object` that supports the following properties:
+    - `sessionExpiryInterval`: representing the Session Expiry Interval in seconds `number`,
+    - `receiveMaximum`: representing the Receive Maximum value `number`,
+    - `maximumPacketSize`: representing the Maximum Packet Size the Client is willing to accept `number`,
+    - `topicAliasMaximum`: representing the Topic Alias Maximum value indicates the highest value that the Client will accept as a Topic Alias sent by the Server `number`,
+    - `requestResponseInformation`: The Client uses this value to request the Server to return Response Information in the CONNACK `boolean`,
+    - `requestProblemInformation`: The Client uses this value to indicate whether the Reason String or User Properties are sent in the case of failures `boolean`,
+    - `userProperties`: The User Property is allowed to appear multiple times to represent multiple name, value pairs `object`,
+    - `authenticationMethod`: the name of the authentication method used for extended authentication `string`,
+    - `authenticationData`: Binary Data containing authentication data `binary`
+  - `authPacket`: settings for auth packet `object`
+  - `will`: a message that will sent by the broker automatically when
+    the client disconnect badly. The format is:
+    - `topic`: the topic to publish
+    - `payload`: the message to publish
+    - `qos`: the QoS
+    - `retain`: the retain flag
+    - `properties`: properties of will by MQTT 5.0:
+      - `willDelayInterval`: representing the Will Delay Interval in seconds `number`,
+      - `payloadFormatIndicator`: Will Message is UTF-8 Encoded Character Data or not `boolean`,
+      - `messageExpiryInterval`: value is the lifetime of the Will Message in seconds and is sent as the Publication Expiry Interval when the Server publishes the Will Message `number`,
+      - `contentType`: describing the content of the Will Message `string`,
+      - `responseTopic`: String which is used as the Topic Name for a response message `string`,
+      - `correlationData`: The Correlation Data is used by the sender of the Request Message to identify which request the Response Message is for when it is received `binary`,
+      - `userProperties`: The User Property is allowed to appear multiple times to represent multiple name, value pairs `object`
+  - `transformWsUrl` : optional `(url, options, client) => url` function
+    For ws/wss protocols only. Can be used to implement signing
+    urls which upon reconnect can have become expired.
+  - `createWebsocket` : optional `url, websocketSubProtocols, options) => Websocket` function
+      For ws/wss protocols only. Can be used to implement a custom websocket subprotocol or implementation.
+  - `resubscribe` : if connection is broken and reconnects,
+    subscribed topics are automatically subscribed again (default `true`)
+  - `subscribeBatchSize` : optional `number`
+    Maximum number of topics per SUBSCRIBE packet. When the number of topics to subscribe exceeds this value, the client will automatically split them into multiple SUBSCRIBE packets of this size.
+  - `messageIdProvider`: custom messageId provider. when `new UniqueMessageIdProvider()` is set, then non conflict messageId is provided.
+  - `log`: custom log function. Default uses [debug](https://www.npmjs.com/package/debug) package.
+  - `manualConnect`: prevents the constructor to call `connect`. In this case after the `mqtt.connect` is called you should call `client.connect` manually.
+  - `timerVariant`: defaults to `auto`, which tries to determine which timer is most appropriate for you environment, if you're having detection issues, you can set it to `worker` or `native`. If none suits you, you can pass a timer object with set and clear properties:
+    ```js
+    timerVariant: {
+      set: (func, timer) => setInterval(func, timer),
+      clear: (id) => clearInterval(id)
+    }
+    ```
+  - `forceNativeWebSocket`: set to true if you're having detection issues (i.e. the `ws does not work in the browser` exception) to force the use of native WebSocket. It is important to note that if set to true for the first client created, then all the clients will use native WebSocket. And conversely, if not set or set to false, all will use the detection result.
+  - `unixSocket`: if you want to connect to a unix socket, set this to true
+
+Instead of setting `socksProxy` you can also supple the same parameter via the environment variable `MQTTJS_SOCKS_PROXY`.
+
+In case mqtts (mqtt over tls) is required, the `options` object is passed through to [`tls.connect()`](http://nodejs.org/api/tls.html#tls_tls_connect_options_callback). If using a **self-signed certificate**, set `rejectUnauthorized: false`. However, be cautious as this exposes you to potential man in the middle attacks and isn't recommended for production.
+
+For those supporting multiple TLS protocols on a single port, like MQTTS and MQTT over WSS, utilize the `ALPNProtocols` option. This lets you define the Application Layer Protocol Negotiation (ALPN) protocol. You can set `ALPNProtocols` as a string array, Buffer, or Uint8Array based on your setup.
+
+If you are connecting to a broker that supports only MQTT 3.1 (not
+3.1.1 compliant), you should pass these additional options:
+
+```js
+{
+  protocolId: 'MQIsdp',
+  protocolVersion: 3
+}
+```
+
+This is confirmed on RabbitMQ 3.2.4, and on Mosquitto < 1.3. Mosquitto
+version 1.3 and 1.4 works fine without those.
+
+<a name="events"></a>
+
+#### Event `'connect'`
+
+`function (connack) {}`
+
+Emitted on successful (re)connection (i.e. connack rc=0).
+
+- `connack` received connack packet. When `clean` connection option is `false` and server has a previous session
+  for `clientId` connection option, then `connack.sessionPresent` flag is `true`. When that is the case,
+  you may rely on stored session and prefer not to send subscribe commands for the client.
+
+#### Event `'reconnect'`
+
+`function () {}`
+
+Emitted when a reconnect starts.
+
+#### Event `'close'`
+
+`function () {}`
+
+Emitted after a disconnection.
+
+#### Event `'disconnect'`
+
+`function (packet) {}`
+
+Emitted after receiving disconnect packet from broker. MQTT 5.0 feature.
+
+#### Event `'offline'`
+
+`function () {}`
+
+Emitted when the client goes offline.
+
+#### Event `'error'`
+
+`function (error) {}`
+
+Emitted when the client cannot connect (i.e. connack rc != 0) or when a
+parsing error occurs.
+
+The following TLS errors will be emitted as an `error` event:
+
+- `ECONNREFUSED`
+- `ECONNRESET`
+- `EADDRINUSE`
+- `ENOTFOUND`
+
+#### Event `'end'`
+
+`function () {}`
+
+Emitted when [`mqtt.Client#end()`](#end) is called.
+If a callback was passed to `mqtt.Client#end()`, this event is emitted once the
+callback returns.
+
+#### Event `'message'`
+
+`function (topic, message, packet) {}`
+
+Emitted when the client receives a publish packet
+
+- `topic` topic of the received packet
+- `message` payload of the received packet
+- `packet` received packet, as defined in
+  [mqtt-packet](https://github.com/mcollina/mqtt-packet#publish)
+
+#### Event `'packetsend'`
+
+`function (packet) {}`
+
+Emitted when the client sends any packet. This includes .published() packets
+as well as packets used by MQTT for managing subscriptions and connections
+
+- `packet` received packet, as defined in
+  [mqtt-packet](https://github.com/mcollina/mqtt-packet)
+
+#### Event `'packetreceive'`
+
+`function (packet) {}`
+
+Emitted when the client receives any packet. This includes packets from
+subscribed topics as well as packets used by MQTT for managing subscriptions
+and connections
+
+- `packet` received packet, as defined in
+  [mqtt-packet](https://github.com/mcollina/mqtt-packet)
+
+---
+
+<a name="client-connect"></a>
+
+### mqtt.Client#connect()
+
+By default client connects when constructor is called. To prevent this you can set `manualConnect` option to `true` and call `client.connect()` manually.
+
+<a name="publish"></a>
+
+### mqtt.Client#publish(topic, message, [options], [callback])
+
+Publish a message to a topic
+
+- `topic` is the topic to publish to, `String`
+- `message` is the message to publish, `Buffer` or `String`
+- `options` is the options to publish with, including:
+  - `qos` QoS level, `Number`, default `0`
+  - `retain` retain flag, `Boolean`, default `false`
+  - `dup` mark as duplicate flag, `Boolean`, default `false`
+  - `properties`: MQTT 5.0 properties `object`
+    - `payloadFormatIndicator`: Payload is UTF-8 Encoded Character Data or not `boolean`,
+    - `messageExpiryInterval`: the lifetime of the Application Message in seconds `number`,
+    - `topicAlias`: value that is used to identify the Topic instead of using the Topic Name `number`,
+    - `responseTopic`: String which is used as the Topic Name for a response message `string`,
+    - `correlationData`: used by the sender of the Request Message to identify which request the Response Message is for when it is received `binary`,
+    - `userProperties`: The User Property is allowed to appear multiple times to represent multiple name, value pairs `object`,
+    - `subscriptionIdentifier`: representing the identifier of the subscription `number`,
+    - `contentType`: String describing the content of the Application Message `string`
+  - `cbStorePut` - `function ()`, fired when message is put into `outgoingStore` if QoS is `1` or `2`.
+- `callback` - `function (err, packet)`, fired when the QoS handling completes,
+  or at the next tick if QoS 0. An error occurs if client is disconnecting.
+
+<a name="publish-async"></a>
+
+### mqtt.Client#publishAsync(topic, message, [options])
+
+Async [`publish`](#publish). Returns a `Promise<Packet | undefined>`.
+
+A packet is anything that has a `messageId` property.
+---
+
+<a name="subscribe"></a>
+
+### mqtt.Client#subscribe(topic/topic array/topic object, [options], [callback])
+
+Subscribe to a topic or topics
+
+- `topic` is a `String` topic to subscribe to or an `Array` of
+  topics to subscribe to. It can also be an object, it has as object
+  keys the topic name and as value the QoS, like `{'test1': {qos: 0}, 'test2': {qos: 1}}`.
+  MQTT `topic` wildcard characters are supported (`+` - for single level and `#` - for multi level)
+- `options` is the options to subscribe with, including:
+  - `qos` QoS subscription level, default 0
+  - `nl` No Local MQTT 5.0 flag (If the value is true, Application Messages MUST NOT be forwarded to a connection with a ClientID equal to the ClientID of the publishing connection)
+  - `rap` Retain as Published MQTT 5.0 flag (If true, Application Messages forwarded using this subscription keep the RETAIN flag they were published with. If false, Application Messages forwarded using this subscription have the RETAIN flag set to 0.)
+  - `rh` Retain Handling MQTT 5.0 (This option specifies whether retained messages are sent when the subscription is established.)
+  - `properties`: `object`
+    - `subscriptionIdentifier`: representing the identifier of the subscription `number`,
+    - `userProperties`: The User Property is allowed to appear multiple times to represent multiple name, value pairs `object`
+- `callback` - `function (err, granted)`
+  callback fired on suback where:
+  - `err` a subscription error or an error that occurs when client is disconnecting
+  - `granted` is an array of `{topic, qos}` where:
+    - `topic` is a subscribed to topic
+    - `qos` is the granted QoS level on it
+
+<a name="subscribe-async"></a>
+
+### mqtt.Client#subscribeAsync(topic/topic array/topic object, [options])
+
+Async [`subscribe`](#subscribe). Returns a `Promise<ISubscriptionGrant[]>`.
+
+---
+
+<a name="unsubscribe"></a>
+
+### mqtt.Client#unsubscribe(topic/topic array, [options], [callback])
+
+Unsubscribe from a topic or topics
+
+- `topic` is a `String` topic or an array of topics to unsubscribe from
+- `options`: options of unsubscribe.
+  - `properties`: `object`
+    - `userProperties`: The User Property is allowed to appear multiple times to represent multiple name, value pairs `object`
+- `callback` - `function (err)`, fired on unsuback. An error occurs if client is disconnecting.
+
+<a name="unsubscribe-async"></a>
+
+### mqtt.Client#unsubscribeAsync(topic/topic array, [options])
+
+Async [`unsubscribe`](#unsubscribe). Returns a `Promise<void>`.
+
+---
+
+<a name="end"></a>
+
+### mqtt.Client#end([force], [options], [callback])
+
+Close the client, accepts the following options:
+
+- `force`: passing it to true will close the client right away, without
+  waiting for the in-flight messages to be acked. This parameter is
+  optional.
+- `options`: options of disconnect.
+  - `reasonCode`: Disconnect Reason Code `number`
+  - `properties`: `object`
+    - `sessionExpiryInterval`: representing the Session Expiry Interval in seconds `number`,
+    - `reasonString`: representing the reason for the disconnect `string`,
+    - `userProperties`: The User Property is allowed to appear multiple times to represent multiple name, value pairs `object`,
+    - `serverReference`: String which can be used by the Client to identify another Server to use `string`
+- `callback`: will be called when the client is closed. This parameter is
+  optional.
+
+<a name="end-async"></a>
+
+### mqtt.Client#endAsync([force], [options])
+
+Async [`end`](#end). Returns a `Promise<void>`.
+
+---
+
+<a name="removeOutgoingMessage"></a>
+
+### mqtt.Client#removeOutgoingMessage(mId)
+
+Remove a message from the outgoingStore.
+The outgoing callback will be called with Error('Message removed') if the message is removed.
+
+After this function is called, the messageId is released and becomes reusable.
+
+- `mId`: The messageId of the message in the outgoingStore.
+
+---
+
+<a name="reconnect"></a>
+
+### mqtt.Client#reconnect()
+
+Connect again using the same options as connect()
+
+---
+
+<a name="handleMessage"></a>
+
+### mqtt.Client#handleMessage(packet, callback)
+
+Handle messages with backpressure support, one at a time.
+Override at will, but **always call `callback`**, or the client
+will hang.
+
+---
+
+<a name="connected"></a>
+
+### mqtt.Client#connected
+
+Boolean : set to `true` if the client is connected. `false` otherwise.
+
+---
+
+<a name="getLastMessageId"></a>
+
+### mqtt.Client#getLastMessageId()
+
+Number : get last message id. This is for sent messages only.
+
+---
+
+<a name="reconnecting"></a>
+
+### mqtt.Client#reconnecting
+
+Boolean : set to `true` if the client is trying to reconnect to the server. `false` otherwise.
+
+---
+
+<a name="store"></a>
+
+### mqtt.Store(options)
+
+In-memory implementation of the message store.
+
+- `options` is the store options:
+  - `clean`: `true`, clean inflight messages when close is called (default `true`)
+
+Other implementations of `mqtt.Store`:
+
+- [mqtt-jsonl-store](https://github.com/robertsLando/mqtt-jsonl-store) which uses
+  [jsonl-db](https://github.com/AlCalzone/jsonl-db) to store inflight data, it works only on Node.
+- [mqtt-level-store](http://npm.im/mqtt-level-store) which uses
+  [Level-browserify](http://npm.im/level-browserify) to store the inflight
+  data, making it usable both in Node and the Browser.
+- [mqtt-nedb-store](https://github.com/behrad/mqtt-nedb-store) which
+  uses [nedb](https://www.npmjs.com/package/nedb) to store the inflight
+  data.
+- [mqtt-localforage-store](http://npm.im/mqtt-localforage-store) which uses
+  [localForage](http://npm.im/localforage) to store the inflight
+  data, making it usable in the Browser without browserify.
+
+---
+
+<a name="put"></a>
+
+### mqtt.Store#put(packet, callback)
+
+Adds a packet to the store, a packet is
+anything that has a `messageId` property.
+The callback is called when the packet has been stored.
+
+---
+
+<a name="createStream"></a>
+
+### mqtt.Store#createStream()
+
+Creates a stream with all the packets in the store.
+
+---
+
+<a name="del"></a>
+
+### mqtt.Store#del(packet, cb)
+
+Removes a packet from the store, a packet is
+anything that has a `messageId` property.
+The callback is called when the packet has been removed.
+
+---
+
+<a name="close"></a>
+
+### mqtt.Store#close(cb)
+
+Closes the Store.
+
+<a name="browser"></a>
+<a name="webpack"></a>
+<a name="vite"></a>
+
+## Browser
+
+> [!IMPORTANT]
+> The only protocol supported in browsers is MQTT over WebSockets, so you must use `ws://` or `wss://` protocols.
+
+While the [ws](https://www.npmjs.com/package/ws) module is used in NodeJS, [WebSocket](https://developer.mozilla.org/en-US/docs/Web/API/WebSocket) is used in browsers. This is totally transparent to users except for the following:
+
+- The `wsOption` is not supported in browsers.
+- Browsers doesn't allow to catch many WebSocket errors for [security reasons](https://stackoverflow.com/a/31003057) as:
+
+  > Access to this information could allow a malicious Web page to gain information about your network, so they require browsers report all connection-time errors in an indistinguishable way.
+
+  So listening for `client.on('error')` may not catch all the errors you would get in NodeJS env.
+
+### Bundle
+
+MQTT.js is bundled using [esbuild](https://esbuild.github.io/). It is tested working with all bundlers like Webpack, Vite and React.
+
+You can find all mqtt bundles versions in `dist` folder:
+
+- `mqtt.js` - iife format, not minified
+- `mqtt.min.js` - iife format, minified
+- `mqtt.esm.js` - esm format minified
+
+Starting from MQTT.js > 5.2.0 you can import mqtt in your code like this:
+
+```js
+import mqtt from 'mqtt'
+```
+
+This will be automatically handled by your bundler.
+
+Otherwise you can choose to use a specific bundle like:
+
+```js
+import * as mqtt from 'mqtt/dist/mqtt'
+import * as mqtt from 'mqtt/dist/mqtt.min'
+import mqtt from 'mqtt/dist/mqtt.esm'
+```
+
+<a name="cdn"></a>
+
+### Via CDN
+
+The MQTT.js bundle is available through <http://unpkg.com>, specifically
+at <https://unpkg.com/mqtt/dist/mqtt.min.js>.
+See <http://unpkg.com> for the full documentation on version ranges.
+
+<a name="qos"></a>
+
+## About QoS
+
+Here is how QoS works:
+
+- QoS 0 : received **at most once** : The packet is sent, and that's it. There is no validation about whether it has been received.
+- QoS 1 : received **at least once** : The packet is sent and stored as long as the client has not received a confirmation from the server. MQTT ensures that it _will_ be received, but there can be duplicates.
+- QoS 2 : received **exactly once** : Same as QoS 1 but there is no duplicates.
+
+About data consumption, obviously, QoS 2 > QoS 1 > QoS 0, if that's a concern to you.
+
+<a name="typescript"></a>
+
+## Usage with TypeScript
+
+Starting from v5 this project is written in TypeScript and the type definitions are included in the package.
+
+Example:
+
+```ts
+import { connect } from "mqtt"
+const client = connect('mqtt://test.mosquitto.org')
+```
+
+<a name="weapp-alipay"></a>
+
+## WeChat and Ali Mini Program support
+
+### WeChat Mini Program
+
+Supports [WeChat Mini Program](https://mp.weixin.qq.com/). Use the `wxs` protocol. See [the WeChat docs](https://mp.weixin.qq.com/debug/wxadoc/dev/api/network-socket.html).
+
+```js
+import 'abortcontroller-polyfill/dist/abortcontroller-polyfill-only' // import before mqtt.
+import 'esbuild-plugin-polyfill-node/polyfills/navigator'
+const mqtt = require("mqtt");
+const client = mqtt.connect("wxs://test.mosquitto.org", {
+  timerVariant: 'native' // more info ref issue: #1797
+});
+```
+
+### Ali Mini Program
+
+Supports [Ali Mini Program](https://open.alipay.com/channel/miniIndex.htm). Use the `alis` protocol. See [the Alipay docs](https://docs.alipay.com/mini/developer/getting-started).
+<a name="example"></a>
+
+```js
+const mqtt = require("mqtt");
+const client = mqtt.connect("alis://test.mosquitto.org");
+```
+
+<a name="contributing"></a>
+
+## Contributing
+
+MQTT.js is an **OPEN Open Source Project**. This means that:
+
+> Individuals making significant and valuable contributions are given commit-access to the project to contribute as they see fit. This project is more like an open wiki than a standard guarded open source project.
+
+See the [CONTRIBUTING.md](https://github.com/mqttjs/MQTT.js/blob/master/CONTRIBUTING.md) file for more details.
+
+### Contributors
+
+MQTT.js is only possible due to the excellent work of the following contributors:
+
+| Name               | GitHub                                             | Twitter                                                    |
+| ------------------ | -------------------------------------------------- | ---------------------------------------------------------- |
+| Adam Rudd          | [GitHub/adamvr](https://github.com/adamvr)         | [Twitter/@adam_vr](http://twitter.com/adam_vr)             |
+| Matteo Collina     | [GitHub/mcollina](https://github.com/mcollina)     | [Twitter/@matteocollina](http://twitter.com/matteocollina) |
+| Maxime Agor        | [GitHub/4rzael](https://github.com/4rzael)         | [Twitter/@4rzael](http://twitter.com/4rzael)               |
+| Siarhei Buntsevich | [GitHub/scarry1992](https://github.com/scarry1992) |                                                            |
+| Daniel Lando    | [GitHub/robertsLando](https://github.com/robertsLando) |                                                           |
+
+<a name="sponsor"></a>
+
+## Sponsor
+
+If you would like to support MQTT.js, please consider sponsoring the author and active maintainers:
+
+- [Matteo Collina](https://github.com/sponsors/mcollina): author of MQTT.js
+- [Daniel Lando](https://github.com/sponsors/robertsLando): active maintainer
+
+<a name="license"></a>
+
+## License
+
+MIT
diff --git a/mqtt-backend/node_modules/mqtt/dist/mqtt.esm.js b/mqtt-backend/node_modules/mqtt/dist/mqtt.esm.js
new file mode 100644
index 0000000..28a11c2
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt/dist/mqtt.esm.js
@@ -0,0 +1,19 @@
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lt=tr(),{ArrayPrototypeIndexOf:G_,NumberIsInteger:z_,NumberIsNaN:K_,NumberParseInt:Q_,ObjectDefineProperties:Gs,ObjectKeys:Y_,ObjectSetPrototypeOf:rd,Promise:nd,SafeSet:J_,SymbolAsyncDispose:X_,SymbolAsyncIterator:Z_,Symbol:ev}=Ee();bd.exports=le;le.ReadableState=Yi;var{EventEmitter:tv}=(er(),me(Zt)),{Stream:nr,prependListener:rv}=$i(),{Buffer:Ds}=(ke(),me(qe)),{addAbortSignal:nv}=kn(),id=Ut(),de=$e().debuglog("stream",t=>{de=t}),iv=Dh(),nn=Ar(),{getHighWaterMark:ov,getDefaultHighWaterMark:sv}=Cn(),{aggregateTwoErrors:ed,codes:{ERR_INVALID_ARG_TYPE:av,ERR_METHOD_NOT_IMPLEMENTED:uv,ERR_OUT_OF_RANGE:lv,ERR_STREAM_PUSH_AFTER_EOF:cv,ERR_STREAM_UNSHIFT_AFTER_END_EVENT:fv},AbortError:hv}=De(),{validateObject:dv}=Xr(),xr=ev("kPaused"),{StringDecoder:od}=Qh(),pv=Us();rd(le.prototype,nr.prototype);rd(le,nr);var js=()=>{},{errorOrDestroy:tn}=nn,rn=1,yv=2,sd=4,Mn=8,ad=16,zi=32,Ki=64,ud=128,gv=256,bv=512,wv=1024,Hs=2048,Vs=4096,mv=8192,_v=16384,vv=32768,ld=65536,Sv=1<<17,Ev=1<<18;function Ce(t){return{enumerable:!1,get(){return(this.state&t)!==0},set(e){e?this.state|=t:this.state&=~t}}}Gs(Yi.prototype,{objectMode:Ce(rn),ended:Ce(yv),endEmitted:Ce(sd),reading:Ce(Mn),constructed:Ce(ad),sync:Ce(zi),needReadable:Ce(Ki),emittedReadable:Ce(ud),readableListening:Ce(gv),resumeScheduled:Ce(bv),errorEmitted:Ce(wv),emitClose:Ce(Hs),autoDestroy:Ce(Vs),destroyed:Ce(mv),closed:Ce(_v),closeEmitted:Ce(vv),multiAwaitDrain:Ce(ld),readingMore:Ce(Sv),dataEmitted:Ce(Ev)});function Yi(t,e,r){typeof r!="boolean"&&(r=e instanceof St()),this.state=Hs|Vs|ad|zi,t&&t.objectMode&&(this.state|=rn),r&&t&&t.readableObjectMode&&(this.state|=rn),this.highWaterMark=t?ov(this,t,"readableHighWaterMark",r):sv(!1),this.buffer=new iv,this.length=0,this.pipes=[],this.flowing=null,this[xr]=null,t&&t.emitClose===!1&&(this.state&=~Hs),t&&t.autoDestroy===!1&&(this.state&=~Vs),this.errored=null,this.defaultEncoding=t&&t.defaultEncoding||"utf8",this.awaitDrainWriters=null,this.decoder=null,this.encoding=null,t&&t.encoding&&(this.decoder=new od(t.encoding),this.encoding=t.encoding)}function le(t){if(!(this instanceof le))return new le(t);let e=this instanceof St();this._readableState=new Yi(t,this,e),t&&(typeof t.read=="function"&&(this._read=t.read),typeof t.destroy=="function"&&(this._destroy=t.destroy),typeof t.construct=="function"&&(this._construct=t.construct),t.signal&&!e&&nv(t.signal,this)),nr.call(this,t),nn.construct(this,()=>{this._readableState.needReadable&&Qi(this,this._readableState)})}le.prototype.destroy=nn.destroy;le.prototype._undestroy=nn.undestroy;le.prototype._destroy=function(t,e){e(t)};le.prototype[tv.captureRejectionSymbol]=function(t){this.destroy(t)};le.prototype[X_]=function(){let t;return this.destroyed||(t=this.readableEnded?null:new hv,this.destroy(t)),new nd((e,r)=>id(this,n=>n&&n!==t?r(n):e(null)))};le.prototype.push=function(t,e){return cd(this,t,e,!1)};le.prototype.unshift=function(t,e){return cd(this,t,e,!0)};function cd(t,e,r,n){de("readableAddChunk",e);let i=t._readableState,s;if((i.state&rn)===0&&(typeof e=="string"?(r=r||i.defaultEncoding,i.encoding!==r&&(n&&i.encoding?e=Ds.from(e,r).toString(i.encoding):(e=Ds.from(e,r),r=""))):e instanceof Ds?r="":nr._isUint8Array(e)?(e=nr._uint8ArrayToBuffer(e),r=""):e!=null&&(s=new av("chunk",["string","Buffer","Uint8Array"],e))),s)tn(t,s);else if(e===null)i.state&=~Mn,xv(t,i);else if((i.state&rn)!==0||e&&e.length>0)if(n)if((i.state&sd)!==0)tn(t,new fv);else{if(i.destroyed||i.errored)return!1;Fs(t,i,e,!0)}else if(i.ended)tn(t,new cv);else{if(i.destroyed||i.errored)return!1;i.state&=~Mn,i.decoder&&!r?(e=i.decoder.write(e),i.objectMode||e.length!==0?Fs(t,i,e,!1):Qi(t,i)):Fs(t,i,e,!1)}else n||(i.state&=~Mn,Qi(t,i));return!i.ended&&(i.length<i.highWaterMark||i.length===0)}function Fs(t,e,r,n){e.flowing&&e.length===0&&!e.sync&&t.listenerCount("data")>0?((e.state&ld)!==0?e.awaitDrainWriters.clear():e.awaitDrainWriters=null,e.dataEmitted=!0,t.emit("data",r)):(e.length+=e.objectMode?1:r.length,n?e.buffer.unshift(r):e.buffer.push(r),(e.state&Ki)!==0&&Ji(t)),Qi(t,e)}le.prototype.isPaused=function(){let t=this._readableState;return t[xr]===!0||t.flowing===!1};le.prototype.setEncoding=function(t){let e=new od(t);this._readableState.decoder=e,this._readableState.encoding=this._readableState.decoder.encoding;let r=this._readableState.buffer,n="";for(let i of r)n+=e.write(i);return r.clear(),n!==""&&r.push(n),this._readableState.length=n.length,this};var Av=1073741824;function Iv(t){if(t>Av)throw new lv("size","<= 1GiB",t);return t--,t|=t>>>1,t|=t>>>2,t|=t>>>4,t|=t>>>8,t|=t>>>16,t++,t}function td(t,e){return t<=0||e.length===0&&e.ended?0:(e.state&rn)!==0?1:K_(t)?e.flowing&&e.length?e.buffer.first().length:e.length:t<=e.length?t:e.ended?e.length:0}le.prototype.read=function(t){de("read",t),t===void 0?t=NaN:z_(t)||(t=Q_(t,10));let e=this._readableState,r=t;if(t>e.highWaterMark&&(e.highWaterMark=Iv(t)),t!==0&&(e.state&=~ud),t===0&&e.needReadable&&((e.highWaterMark!==0?e.length>=e.highWaterMark:e.length>0)||e.ended))return de("read: emitReadable",e.length,e.ended),e.length===0&&e.ended?Ws(this):Ji(this),null;if(t=td(t,e),t===0&&e.ended)return e.length===0&&Ws(this),null;let n=(e.state&Ki)!==0;if(de("need readable",n),(e.length===0||e.length-t<e.highWaterMark)&&(n=!0,de("length less than watermark",n)),e.ended||e.reading||e.destroyed||e.errored||!e.constructed)n=!1,de("reading, ended or constructing",n);else if(n){de("do read"),e.state|=Mn|zi,e.length===0&&(e.state|=Ki);try{this._read(e.highWaterMark)}catch(s){tn(this,s)}e.state&=~zi,e.reading||(t=td(r,e))}let i;return t>0?i=yd(t,e):i=null,i===null?(e.needReadable=e.length<=e.highWaterMark,t=0):(e.length-=t,e.multiAwaitDrain?e.awaitDrainWriters.clear():e.awaitDrainWriters=null),e.length===0&&(e.ended||(e.needReadable=!0),r!==t&&e.ended&&Ws(this)),i!==null&&!e.errorEmitted&&!e.closeEmitted&&(e.dataEmitted=!0,this.emit("data",i)),i};function xv(t,e){if(de("onEofChunk"),!e.ended){if(e.decoder){let r=e.decoder.end();r&&r.length&&(e.buffer.push(r),e.length+=e.objectMode?1:r.length)}e.ended=!0,e.sync?Ji(t):(e.needReadable=!1,e.emittedReadable=!0,fd(t))}}function Ji(t){let e=t._readableState;de("emitReadable",e.needReadable,e.emittedReadable),e.needReadable=!1,e.emittedReadable||(de("emitReadable",e.flowing),e.emittedReadable=!0,lt.nextTick(fd,t))}function fd(t){let e=t._readableState;de("emitReadable_",e.destroyed,e.length,e.ended),!e.destroyed&&!e.errored&&(e.length||e.ended)&&(t.emit("readable"),e.emittedReadable=!1),e.needReadable=!e.flowing&&!e.ended&&e.length<=e.highWaterMark,dd(t)}function 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h(){de("cleanup"),t.removeListener("close",P),t.removeListener("finish",S),c&&t.removeListener("drain",c),t.removeListener("error",g),t.removeListener("unpipe",o),r.removeListener("end",a),r.removeListener("end",b),r.removeListener("data",m),f=!0,c&&n.awaitDrainWriters&&(!t._writableState||t._writableState.needDrain)&&c()}function d(){f||(n.pipes.length===1&&n.pipes[0]===t?(de("false write response, pause",0),n.awaitDrainWriters=t,n.multiAwaitDrain=!1):n.pipes.length>1&&n.pipes.includes(t)&&(de("false write response, pause",n.awaitDrainWriters.size),n.awaitDrainWriters.add(t)),r.pause()),c||(c=Pv(r,t),t.on("drain",c))}r.on("data",m);function m(w){de("ondata");let _=t.write(w);de("dest.write",_),_===!1&&d()}function g(w){if(de("onerror",w),b(),t.removeListener("error",g),t.listenerCount("error")===0){let _=t._writableState||t._readableState;_&&!_.errorEmitted?tn(t,w):t.emit("error",w)}}rv(t,"error",g);function P(){t.removeListener("finish",S),b()}t.once("close",P);function 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e=!1;if(this.packet.length===0||this._list.length>=this.packet.length){switch(this._pos=0,this.packet.cmd){case"connect":this._parseConnect();break;case"connack":this._parseConnack();break;case"publish":this._parsePublish();break;case"puback":case"pubrec":case"pubrel":case"pubcomp":this._parseConfirmation();break;case"subscribe":this._parseSubscribe();break;case"suback":this._parseSuback();break;case"unsubscribe":this._parseUnsubscribe();break;case"unsuback":this._parseUnsuback();break;case"pingreq":case"pingresp":break;case"disconnect":this._parseDisconnect();break;case"auth":this._parseAuth();break;default:this._emitError(new Error("Not supported"))}e=!0}return ae("_parsePayload complete result: %s",e),e}_parseConnect(){ae("_parseConnect");let e,r,n,i,s={},o=this.packet,a=this._parseString();if(a===null)return this._emitError(new Error("Cannot parse protocolId"));if(a!=="MQTT"&&a!=="MQIsdp")return this._emitError(new Error("Invalid protocolId"));if(o.protocolId=a,this._pos>=this._list.length)return this._emitError(new Error("Packet too short"));if(o.protocolVersion=this._list.readUInt8(this._pos),o.protocolVersion>=128&&(o.bridgeMode=!0,o.protocolVersion=o.protocolVersion-128),o.protocolVersion!==3&&o.protocolVersion!==4&&o.protocolVersion!==5)return this._emitError(new Error("Invalid protocol version"));if(this._pos++,this._pos>=this._list.length)return this._emitError(new Error("Packet too short"));if(this._list.readUInt8(this._pos)&1)return this._emitError(new Error("Connect flag bit 0 must be 0, but got 1"));s.username=this._list.readUInt8(this._pos)&pe.USERNAME_MASK,s.password=this._list.readUInt8(this._pos)&pe.PASSWORD_MASK,s.will=this._list.readUInt8(this._pos)&pe.WILL_FLAG_MASK;let c=!!(this._list.readUInt8(this._pos)&pe.WILL_RETAIN_MASK),f=(this._list.readUInt8(this._pos)&pe.WILL_QOS_MASK)>>pe.WILL_QOS_SHIFT;if(s.will)o.will={},o.will.retain=c,o.will.qos=f;else{if(c)return this._emitError(new Error("Will Retain Flag must be set to zero when Will Flag is set to 0"));if(f)return this._emitError(new Error("Will QoS must be set to zero when Will Flag is set to 0"))}if(o.clean=(this._list.readUInt8(this._pos)&pe.CLEAN_SESSION_MASK)!==0,this._pos++,o.keepalive=this._parseNum(),o.keepalive===-1)return this._emitError(new Error("Packet too short"));if(o.protocolVersion===5){let d=this._parseProperties();Object.getOwnPropertyNames(d).length&&(o.properties=d)}let h=this._parseString();if(h===null)return this._emitError(new Error("Packet too short"));if(o.clientId=h,ae("_parseConnect: packet.clientId: %s",o.clientId),s.will){if(o.protocolVersion===5){let d=this._parseProperties();Object.getOwnPropertyNames(d).length&&(o.will.properties=d)}if(e=this._parseString(),e===null)return this._emitError(new Error("Cannot parse will topic"));if(o.will.topic=e,ae("_parseConnect: packet.will.topic: %s",o.will.topic),r=this._parseBuffer(),r===null)return this._emitError(new Error("Cannot parse will payload"));o.will.payload=r,ae("_parseConnect: packet.will.paylaod: %s",o.will.payload)}if(s.username){if(i=this._parseString(),i===null)return this._emitError(new Error("Cannot parse username"));o.username=i,ae("_parseConnect: packet.username: %s",o.username)}if(s.password){if(n=this._parseBuffer(),n===null)return this._emitError(new Error("Cannot parse password"));o.password=n}return this.settings=o,ae("_parseConnect: complete"),o}_parseConnack(){ae("_parseConnack");let e=this.packet;if(this._list.length<1)return null;let r=this._list.readUInt8(this._pos++);if(r>1)return this._emitError(new Error("Invalid connack flags, bits 7-1 must be set to 0"));if(e.sessionPresent=!!(r&pe.SESSIONPRESENT_MASK),this.settings.protocolVersion===5)this._list.length>=2?e.reasonCode=this._list.readUInt8(this._pos++):e.reasonCode=0;else{if(this._list.length<2)return null;e.returnCode=this._list.readUInt8(this._pos++)}if(e.returnCode===-1||e.reasonCode===-1)return this._emitError(new Error("Cannot parse return code"));if(this.settings.protocolVersion===5){let n=this._parseProperties();Object.getOwnPropertyNames(n).length&&(e.properties=n)}ae("_parseConnack: complete")}_parsePublish(){ae("_parsePublish");let e=this.packet;if(e.topic=this._parseString(),e.topic===null)return this._emitError(new Error("Cannot parse topic"));if(!(e.qos>0&&!this._parseMessageId())){if(this.settings.protocolVersion===5){let r=this._parseProperties();Object.getOwnPropertyNames(r).length&&(e.properties=r)}e.payload=this._list.slice(this._pos,e.length),ae("_parsePublish: payload from buffer list: %o",e.payload)}}_parseSubscribe(){ae("_parseSubscribe");let e=this.packet,r,n,i,s,o,a,c;if(e.subscriptions=[],!!this._parseMessageId()){if(this.settings.protocolVersion===5){let f=this._parseProperties();Object.getOwnPropertyNames(f).length&&(e.properties=f)}if(e.length<=0)return this._emitError(new Error("Malformed subscribe, no payload specified"));for(;this._pos<e.length;){if(r=this._parseString(),r===null)return this._emitError(new Error("Cannot parse topic"));if(this._pos>=e.length)return this._emitError(new Error("Malformed Subscribe Payload"));if(n=this._parseByte(),this.settings.protocolVersion===5){if(n&192)return this._emitError(new Error("Invalid subscribe topic flag bits, bits 7-6 must be 0"))}else if(n&252)return this._emitError(new Error("Invalid subscribe topic flag bits, bits 7-2 must be 0"));if(i=n&pe.SUBSCRIBE_OPTIONS_QOS_MASK,i>2)return this._emitError(new Error("Invalid subscribe QoS, must be <= 2"));if(a=(n>>pe.SUBSCRIBE_OPTIONS_NL_SHIFT&pe.SUBSCRIBE_OPTIONS_NL_MASK)!==0,o=(n>>pe.SUBSCRIBE_OPTIONS_RAP_SHIFT&pe.SUBSCRIBE_OPTIONS_RAP_MASK)!==0,s=n>>pe.SUBSCRIBE_OPTIONS_RH_SHIFT&pe.SUBSCRIBE_OPTIONS_RH_MASK,s>2)return this._emitError(new Error("Invalid retain handling, must be <= 2"));c={topic:r,qos:i},this.settings.protocolVersion===5?(c.nl=a,c.rap=o,c.rh=s):this.settings.bridgeMode&&(c.rh=0,c.rap=!0,c.nl=!0),ae("_parseSubscribe: push subscription `%s` to subscription",c),e.subscriptions.push(c)}}}_parseSuback(){ae("_parseSuback");let e=this.packet;if(this.packet.granted=[],!!this._parseMessageId()){if(this.settings.protocolVersion===5){let r=this._parseProperties();Object.getOwnPropertyNames(r).length&&(e.properties=r)}if(e.length<=0)return this._emitError(new Error("Malformed suback, no payload specified"));for(;this._pos<this.packet.length;){let r=this._list.readUInt8(this._pos++);if(this.settings.protocolVersion===5){if(!pe.MQTT5_SUBACK_CODES[r])return this._emitError(new Error("Invalid suback code"))}else if(r>2&&r!==128)return this._emitError(new Error("Invalid suback QoS, must be 0, 1, 2 or 128"));this.packet.granted.push(r)}}}_parseUnsubscribe(){ae("_parseUnsubscribe");let e=this.packet;if(e.unsubscriptions=[],!!this._parseMessageId()){if(this.settings.protocolVersion===5){let r=this._parseProperties();Object.getOwnPropertyNames(r).length&&(e.properties=r)}if(e.length<=0)return this._emitError(new Error("Malformed unsubscribe, no payload specified"));for(;this._pos<e.length;){let r=this._parseString();if(r===null)return this._emitError(new Error("Cannot parse topic"));ae("_parseUnsubscribe: push topic `%s` to unsubscriptions",r),e.unsubscriptions.push(r)}}}_parseUnsuback(){ae("_parseUnsuback");let e=this.packet;if(!this._parseMessageId())return this._emitError(new Error("Cannot parse messageId"));if((this.settings.protocolVersion===3||this.settings.protocolVersion===4)&&e.length!==2)return this._emitError(new Error("Malformed unsuback, payload length must be 2"));if(e.length<=0)return this._emitError(new Error("Malformed unsuback, no payload specified"));if(this.settings.protocolVersion===5){let r=this._parseProperties();for(Object.getOwnPropertyNames(r).length&&(e.properties=r),e.granted=[];this._pos<this.packet.length;){let n=this._list.readUInt8(this._pos++);if(!pe.MQTT5_UNSUBACK_CODES[n])return this._emitError(new Error("Invalid unsuback code"));this.packet.granted.push(n)}}}_parseConfirmation(){ae("_parseConfirmation: packet.cmd: `%s`",this.packet.cmd);let e=this.packet;if(this._parseMessageId(),this.settings.protocolVersion===5){if(e.length>2){switch(e.reasonCode=this._parseByte(),this.packet.cmd){case"puback":case"pubrec":if(!pe.MQTT5_PUBACK_PUBREC_CODES[e.reasonCode])return this._emitError(new Error("Invalid "+this.packet.cmd+" reason code"));break;case"pubrel":case"pubcomp":if(!pe.MQTT5_PUBREL_PUBCOMP_CODES[e.reasonCode])return this._emitError(new Error("Invalid "+this.packet.cmd+" reason code"));break}ae("_parseConfirmation: packet.reasonCode `%d`",e.reasonCode)}else e.reasonCode=0;if(e.length>3){let r=this._parseProperties();Object.getOwnPropertyNames(r).length&&(e.properties=r)}}return!0}_parseDisconnect(){let e=this.packet;if(ae("_parseDisconnect"),this.settings.protocolVersion===5){this._list.length>0?(e.reasonCode=this._parseByte(),pe.MQTT5_DISCONNECT_CODES[e.reasonCode]||this._emitError(new Error("Invalid disconnect reason code"))):e.reasonCode=0;let r=this._parseProperties();Object.getOwnPropertyNames(r).length&&(e.properties=r)}return ae("_parseDisconnect result: true"),!0}_parseAuth(){ae("_parseAuth");let e=this.packet;if(this.settings.protocolVersion!==5)return this._emitError(new Error("Not supported auth packet for this version MQTT"));if(e.reasonCode=this._parseByte(),!pe.MQTT5_AUTH_CODES[e.reasonCode])return this._emitError(new Error("Invalid auth reason code"));let r=this._parseProperties();return Object.getOwnPropertyNames(r).length&&(e.properties=r),ae("_parseAuth: result: true"),!0}_parseMessageId(){let e=this.packet;return e.messageId=this._parseNum(),e.messageId===null?(this._emitError(new Error("Cannot parse messageId")),!1):(ae("_parseMessageId: packet.messageId %d",e.messageId),!0)}_parseString(e){let r=this._parseNum(),n=r+this._pos;if(r===-1||n>this._list.length||n>this.packet.length)return null;let i=this._list.toString("utf8",this._pos,n);return this._pos+=r,ae("_parseString: result: %s",i),i}_parseStringPair(){return ae("_parseStringPair"),{name:this._parseString(),value:this._parseString()}}_parseBuffer(){let e=this._parseNum(),r=e+this._pos;if(e===-1||r>this._list.length||r>this.packet.length)return null;let n=this._list.slice(this._pos,r);return this._pos+=e,ae("_parseBuffer: result: %o",n),n}_parseNum(){if(this._list.length-this._pos<2)return-1;let e=this._list.readUInt16BE(this._pos);return this._pos+=2,ae("_parseNum: result: %s",e),e}_parse4ByteNum(){if(this._list.length-this._pos<4)return-1;let e=this._list.readUInt32BE(this._pos);return this._pos+=4,ae("_parse4ByteNum: result: %s",e),e}_parseVarByteNum(e){ae("_parseVarByteNum");let r=4,n=0,i=1,s=0,o=!1,a,c=this._pos?this._pos:0;for(;n<r&&c+n<this._list.length;){if(a=this._list.readUInt8(c+n++),s+=i*(a&pe.VARBYTEINT_MASK),i*=128,(a&pe.VARBYTEINT_FIN_MASK)===0){o=!0;break}if(this._list.length<=n)break}return!o&&n===r&&this._list.length>=n&&this._emitError(new Error("Invalid variable byte integer")),c&&(this._pos+=n),o?e?o={bytes:n,value:s}:o=s:o=!1,ae("_parseVarByteNum: result: %o",o),o}_parseByte(){let e;return this._pos<this._list.length&&(e=this._list.readUInt8(this._pos),this._pos++),ae("_parseByte: result: %o",e),e}_parseByType(e){switch(ae("_parseByType: type: %s",e),e){case"byte":return this._parseByte()!==0;case"int8":return this._parseByte();case"int16":return this._parseNum();case"int32":return this._parse4ByteNum();case"var":return this._parseVarByteNum();case"string":return this._parseString();case"pair":return this._parseStringPair();case"binary":return this._parseBuffer()}}_parseProperties(){ae("_parseProperties");let e=this._parseVarByteNum(),n=this._pos+e,i={};for(;this._pos<n;){let s=this._parseByte();if(!s)return this._emitError(new Error("Cannot parse property code type")),!1;let o=pe.propertiesCodes[s];if(!o)return this._emitError(new Error("Unknown property")),!1;if(o==="userProperties"){i[o]||(i[o]=Object.create(null));let a=this._parseByType(pe.propertiesTypes[o]);if(i[o][a.name])if(Array.isArray(i[o][a.name]))i[o][a.name].push(a.value);else{let c=i[o][a.name];i[o][a.name]=[c],i[o][a.name].push(a.value)}else i[o][a.name]=a.value;continue}i[o]?Array.isArray(i[o])?i[o].push(this._parseByType(pe.propertiesTypes[o])):(i[o]=[i[o]],i[o].push(this._parseByType(pe.propertiesTypes[o]))):i[o]=this._parseByType(pe.propertiesTypes[o])}return i}_newPacket(){return ae("_newPacket"),this.packet&&(this._list.consume(this.packet.length),ae("_newPacket: parser emit packet: packet.cmd: %s, packet.payload: %s, packet.length: %d",this.packet.cmd,this.packet.payload,this.packet.length),this.emit("packet",this.packet)),ae("_newPacket: new packet"),this.packet=new Fp,this._pos=0,!0}_emitError(e){ae("_emitError",e),this.error=e,this.emit("error",e)}};Wp.exports=Oa});var zp=j((H2,Gp)=>{A();x();I();var{Buffer:Hn}=(ke(),me(qe)),KS=65536,Hp={},QS=Hn.isBuffer(Hn.from([1,2]).subarray(0,1));function Vp(t){let e=Hn.allocUnsafe(2);return e.writeUInt8(t>>8,0),e.writeUInt8(t&255,1),e}function YS(){for(let t=0;t<KS;t++)Hp[t]=Vp(t)}function JS(t){let r=0,n=0,i=Hn.allocUnsafe(4);do r=t%128|0,t=t/128|0,t>0&&(r=r|128),i.writeUInt8(r,n++);while(t>0&&n<4);return t>0&&(n=0),QS?i.subarray(0,n):i.slice(0,n)}function XS(t){let e=Hn.allocUnsafe(4);return e.writeUInt32BE(t,0),e}Gp.exports={cache:Hp,generateCache:YS,generateNumber:Vp,genBufVariableByteInt:JS,generate4ByteBuffer:XS}});var Kp=j((eN,Ra)=>{"use strict";A();x();I();typeof N>"u"||!N.version||N.version.indexOf("v0.")===0||N.version.indexOf("v1.")===0&&N.version.indexOf("v1.8.")!==0?Ra.exports={nextTick:ZS}:Ra.exports=N;function ZS(t,e,r,n){if(typeof t!="function")throw new TypeError('"callback" argument must be a function');var i=arguments.length,s,o;switch(i){case 0:case 1:return N.nextTick(t);case 2:return N.nextTick(function(){t.call(null,e)});case 3:return N.nextTick(function(){t.call(null,e,r)});case 4:return N.nextTick(function(){t.call(null,e,r,n)});default:for(s=new Array(i-1),o=0;o<s.length;)s[o++]=arguments[o];return N.nextTick(function(){t.apply(null,s)})}}});var Ba=j((cN,ry)=>{A();x();I();var ue=Pa(),{Buffer:se}=(ke(),me(qe)),eE=se.allocUnsafe(0),tE=se.from([0]),Vn=zp(),rE=Kp().nextTick,rt=At()("mqtt-packet:writeToStream"),yo=Vn.cache,nE=Vn.generateNumber,iE=Vn.generateCache,ka=Vn.genBufVariableByteInt,oE=Vn.generate4ByteBuffer,He=Ca,go=!0;function ey(t,e,r){switch(rt("generate called"),e.cork&&(e.cork(),rE(sE,e)),go&&(go=!1,iE()),rt("generate: packet.cmd: %s",t.cmd),t.cmd){case"connect":return aE(t,e,r);case"connack":return uE(t,e,r);case"publish":return lE(t,e,r);case"puback":case"pubrec":case"pubrel":case"pubcomp":return cE(t,e,r);case"subscribe":return fE(t,e,r);case"suback":return hE(t,e,r);case"unsubscribe":return dE(t,e,r);case"unsuback":return pE(t,e,r);case"pingreq":case"pingresp":return yE(t,e,r);case"disconnect":return gE(t,e,r);case"auth":return bE(t,e,r);default:return e.destroy(new Error("Unknown command")),!1}}Object.defineProperty(ey,"cacheNumbers",{get(){return He===Ca},set(t){t?((!yo||Object.keys(yo).length===0)&&(go=!0),He=Ca):(go=!1,He=wE)}});function sE(t){t.uncork()}function aE(t,e,r){let n=t||{},i=n.protocolId||"MQTT",s=n.protocolVersion||4,o=n.will,a=n.clean,c=n.keepalive||0,f=n.clientId||"",h=n.username,d=n.password,m=n.properties;a===void 0&&(a=!0);let g=0;if(!i||typeof i!="string"&&!se.isBuffer(i))return e.destroy(new Error("Invalid protocolId")),!1;if(g+=i.length+2,s!==3&&s!==4&&s!==5)return e.destroy(new Error("Invalid protocol version")),!1;if(g+=1,(typeof f=="string"||se.isBuffer(f))&&(f||s>=4)&&(f||a))g+=se.byteLength(f)+2;else{if(s<4)return e.destroy(new Error("clientId must be supplied before 3.1.1")),!1;if(a*1===0)return e.destroy(new Error("clientId must be given if cleanSession set to 0")),!1}if(typeof c!="number"||c<0||c>65535||c%1!==0)return e.destroy(new Error("Invalid keepalive")),!1;g+=2,g+=1;let P,S;if(s===5){if(P=ar(e,m),!P)return!1;g+=P.length}if(o){if(typeof o!="object")return e.destroy(new Error("Invalid will")),!1;if(!o.topic||typeof o.topic!="string")return e.destroy(new Error("Invalid will topic")),!1;if(g+=se.byteLength(o.topic)+2,g+=2,o.payload)if(o.payload.length>=0)typeof o.payload=="string"?g+=se.byteLength(o.payload):g+=o.payload.length;else return e.destroy(new Error("Invalid will payload")),!1;if(S={},s===5){if(S=ar(e,o.properties),!S)return!1;g+=S.length}}let b=!1;if(h!=null)if(Zp(h))b=!0,g+=se.byteLength(h)+2;else return e.destroy(new Error("Invalid username")),!1;if(d!=null){if(!b)return e.destroy(new Error("Username is required to use password")),!1;if(Zp(d))g+=ty(d)+2;else return e.destroy(new Error("Invalid password")),!1}e.write(ue.CONNECT_HEADER),nt(e,g),pn(e,i),n.bridgeMode&&(s+=128),e.write(s===131?ue.VERSION131:s===132?ue.VERSION132:s===4?ue.VERSION4:s===5?ue.VERSION5:ue.VERSION3);let w=0;return w|=h!=null?ue.USERNAME_MASK:0,w|=d!=null?ue.PASSWORD_MASK:0,w|=o&&o.retain?ue.WILL_RETAIN_MASK:0,w|=o&&o.qos?o.qos<<ue.WILL_QOS_SHIFT:0,w|=o?ue.WILL_FLAG_MASK:0,w|=a?ue.CLEAN_SESSION_MASK:0,e.write(se.from([w])),He(e,c),s===5&&P.write(),pn(e,f),o&&(s===5&&S.write(),Br(e,o.topic),pn(e,o.payload)),h!=null&&pn(e,h),d!=null&&pn(e,d),!0}function uE(t,e,r){let n=r?r.protocolVersion:4,i=t||{},s=n===5?i.reasonCode:i.returnCode,o=i.properties,a=2;if(typeof s!="number")return e.destroy(new Error("Invalid return code")),!1;let c=null;if(n===5){if(c=ar(e,o),!c)return!1;a+=c.length}return e.write(ue.CONNACK_HEADER),nt(e,a),e.write(i.sessionPresent?ue.SESSIONPRESENT_HEADER:tE),e.write(se.from([s])),c?.write(),!0}function lE(t,e,r){rt("publish: packet: %o",t);let n=r?r.protocolVersion:4,i=t||{},s=i.qos||0,o=i.retain?ue.RETAIN_MASK:0,a=i.topic,c=i.payload||eE,f=i.messageId,h=i.properties,d=0;if(typeof a=="string")d+=se.byteLength(a)+2;else if(se.isBuffer(a))d+=a.length+2;else return e.destroy(new Error("Invalid topic")),!1;if(se.isBuffer(c)?d+=c.length:d+=se.byteLength(c),s&&typeof f!="number")return e.destroy(new Error("Invalid messageId")),!1;s&&(d+=2);let m=null;if(n===5){if(m=ar(e,h),!m)return!1;d+=m.length}return e.write(ue.PUBLISH_HEADER[s][i.dup?1:0][o?1:0]),nt(e,d),He(e,ty(a)),e.write(a),s>0&&He(e,f),m?.write(),rt("publish: payload: %o",c),e.write(c)}function cE(t,e,r){let n=r?r.protocolVersion:4,i=t||{},s=i.cmd||"puback",o=i.messageId,a=i.dup&&s==="pubrel"?ue.DUP_MASK:0,c=0,f=i.reasonCode,h=i.properties,d=n===5?3:2;if(s==="pubrel"&&(c=1),typeof o!="number")return e.destroy(new Error("Invalid messageId")),!1;let m=null;if(n===5&&typeof h=="object"){if(m=Gn(e,h,r,d),!m)return!1;d+=m.length}return e.write(ue.ACKS[s][c][a][0]),d===3&&(d+=f!==0?1:-1),nt(e,d),He(e,o),n===5&&d!==2&&e.write(se.from([f])),m!==null?m.write():d===4&&e.write(se.from([0])),!0}function fE(t,e,r){rt("subscribe: packet: ");let n=r?r.protocolVersion:4,i=t||{},s=i.dup?ue.DUP_MASK:0,o=i.messageId,a=i.subscriptions,c=i.properties,f=0;if(typeof o!="number")return e.destroy(new Error("Invalid messageId")),!1;f+=2;let h=null;if(n===5){if(h=ar(e,c),!h)return!1;f+=h.length}if(typeof a=="object"&&a.length)for(let m=0;m<a.length;m+=1){let g=a[m].topic,P=a[m].qos;if(typeof g!="string")return e.destroy(new Error("Invalid subscriptions - invalid topic")),!1;if(typeof P!="number")return e.destroy(new Error("Invalid subscriptions - invalid qos")),!1;if(n===5){if(typeof(a[m].nl||!1)!="boolean")return e.destroy(new Error("Invalid subscriptions - invalid No Local")),!1;if(typeof(a[m].rap||!1)!="boolean")return e.destroy(new Error("Invalid subscriptions - invalid Retain as Published")),!1;let w=a[m].rh||0;if(typeof w!="number"||w>2)return e.destroy(new Error("Invalid subscriptions - invalid Retain Handling")),!1}f+=se.byteLength(g)+2+1}else return e.destroy(new Error("Invalid subscriptions")),!1;rt("subscribe: writing to stream: %o",ue.SUBSCRIBE_HEADER),e.write(ue.SUBSCRIBE_HEADER[1][s?1:0][0]),nt(e,f),He(e,o),h!==null&&h.write();let d=!0;for(let m of a){let g=m.topic,P=m.qos,S=+m.nl,b=+m.rap,w=m.rh,_;Br(e,g),_=ue.SUBSCRIBE_OPTIONS_QOS[P],n===5&&(_|=S?ue.SUBSCRIBE_OPTIONS_NL:0,_|=b?ue.SUBSCRIBE_OPTIONS_RAP:0,_|=w?ue.SUBSCRIBE_OPTIONS_RH[w]:0),d=e.write(se.from([_]))}return d}function hE(t,e,r){let n=r?r.protocolVersion:4,i=t||{},s=i.messageId,o=i.granted,a=i.properties,c=0;if(typeof s!="number")return e.destroy(new Error("Invalid messageId")),!1;if(c+=2,typeof o=="object"&&o.length)for(let h=0;h<o.length;h+=1){if(typeof o[h]!="number")return e.destroy(new Error("Invalid qos vector")),!1;c+=1}else return e.destroy(new Error("Invalid qos vector")),!1;let 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The message is skipped and removed.",o.messageId),i())};this.log("connect :: sending queued packets"),i()}),this.on("close",()=>{this.log("close :: connected set to `false`"),this.connected=!1,this.log("close :: clearing connackTimer"),clearTimeout(this.connackTimer),this._destroyKeepaliveManager(),this.topicAliasRecv&&this.topicAliasRecv.clear(),this.log("close :: calling _setupReconnect"),this._setupReconnect()}),this.options.manualConnect||(this.log("MqttClient :: setting up stream"),this.connect())}handleAuth(e,r){r()}handleMessage(e,r){r()}_nextId(){return this.messageIdProvider.allocate()}getLastMessageId(){return this.messageIdProvider.getLastAllocated()}connect(){let e=new $A.Writable,r=Fu.default.parser(this.options),n=null,i=[];this.log("connect :: calling method to clear reconnect"),this._clearReconnect(),this.disconnected&&!this.reconnecting&&(this.incomingStore=this.options.incomingStore||new vn.default,this.outgoingStore=this.options.outgoingStore||new vn.default,this.disconnecting=!1,this.disconnected=!1),this.log("connect :: using streamBuilder provided to client to create stream"),this.stream=this.streamBuilder(this),r.on("packet",f=>{this.log("parser :: on packet push to packets array."),i.push(f)});let s=()=>{this.log("work :: getting next packet in queue");let f=i.shift();if(f)this.log("work :: packet pulled from queue"),(0,VA.default)(this,f,o);else{this.log("work :: no packets in queue");let h=n;n=null,this.log("work :: done flag is %s",!!h),h&&h()}},o=()=>{if(i.length)(0,bi.nextTick)(s);else{let f=n;n=null,f()}};e._write=(f,h,d)=>{n=d,this.log("writable stream :: parsing buffer"),r.parse(f),s()};let a=f=>{this.log("streamErrorHandler :: error",f.message),f.code?(this.log("streamErrorHandler :: emitting error"),this.emit("error",f)):this.noop(f)};this.log("connect :: pipe stream to writable stream"),this.stream.pipe(e),this.stream.on("error",a),this.stream.on("close",()=>{this.log("(%s)stream :: on close",this.options.clientId),this._flushVolatile(),this.log("stream: emit close to MqttClient"),this.emit("close")}),this.log("connect: sending packet `connect`");let c={cmd:"connect",protocolId:this.options.protocolId,protocolVersion:this.options.protocolVersion,clean:this.options.clean,clientId:this.options.clientId,keepalive:this.options.keepalive,username:this.options.username,password:this.options.password,properties:this.options.properties};if(this.options.will&&(c.will={...this.options.will,payload:this.options.will?.payload}),this.topicAliasRecv&&(c.properties||(c.properties={}),this.topicAliasRecv&&(c.properties.topicAliasMaximum=this.topicAliasRecv.max)),this._writePacket(c),r.on("error",this.emit.bind(this,"error")),this.options.properties){if(!this.options.properties.authenticationMethod&&this.options.properties.authenticationData)return this.end(()=>this.emit("error",new Error("Packet has no Authentication Method"))),this;if(this.options.properties.authenticationMethod&&this.options.authPacket&&typeof this.options.authPacket=="object"){let f={cmd:"auth",reasonCode:0,...this.options.authPacket};this._writePacket(f)}}return this.stream.setMaxListeners(1e3),clearTimeout(this.connackTimer),this.connackTimer=setTimeout(()=>{this.log("!!connectTimeout hit!! Calling _cleanUp with force `true`"),this.emit("error",new Error("connack timeout")),this._cleanUp(!0)},this.options.connectTimeout),this}publish(e,r,n,i){this.log("publish :: message `%s` to topic `%s`",r,e);let{options:s}=this;typeof n=="function"&&(i=n,n=null),n=n||{},n={...{qos:0,retain:!1,dup:!1},...n};let{qos:a,retain:c,dup:f,properties:h,cbStorePut:d}=n;if(this._checkDisconnecting(i))return this;let m=()=>{let g=0;if((a===1||a===2)&&(g=this._nextId(),g===null))return this.log("No messageId left"),!1;let P={cmd:"publish",topic:e,payload:r,qos:a,retain:c,messageId:g,dup:f};switch(s.protocolVersion===5&&(P.properties=h),this.log("publish :: qos",a),a){case 1:case 2:this.outgoing[P.messageId]={volatile:!1,cb:i||this.noop},this.log("MqttClient:publish: packet cmd: %s",P.cmd),this._sendPacket(P,void 0,d);break;default:this.log("MqttClient:publish: packet cmd: %s",P.cmd),this._sendPacket(P,i,d);break}return!0};return(this._storeProcessing||this._storeProcessingQueue.length>0||!m())&&this._storeProcessingQueue.push({invoke:m,cbStorePut:n.cbStorePut,callback:i}),this}publishAsync(e,r,n){return new Promise((i,s)=>{this.publish(e,r,n,(o,a)=>{o?s(o):i(a)})})}subscribe(e,r,n){let i=this.options.protocolVersion;typeof r=="function"&&(n=r),n=n||this.noop;let s=!1,o=[];typeof e=="string"?(e=[e],o=e):Array.isArray(e)?o=e:typeof e=="object"&&(s=e.resubscribe,delete e.resubscribe,o=Object.keys(e));let a=Cg.validateTopics(o);if(a!==null)return Wu(n,new Error(`Invalid topic ${a}`)),this;if(this._checkDisconnecting(n))return this.log("subscribe: discconecting true"),this;let c={qos:0};i===5&&(c.nl=!1,c.rap=!1,c.rh=0),r={...c,...r};let{properties:f}=r,h=[],d=(P,S)=>{if(S=S||r,!Object.prototype.hasOwnProperty.call(this._resubscribeTopics,P)||this._resubscribeTopics[P].qos<S.qos||s){let b={topic:P,qos:S.qos};i===5&&(b.nl=S.nl,b.rap=S.rap,b.rh=S.rh,b.properties=f),this.log("subscribe: pushing topic `%s` and qos `%s` to subs list",b.topic,b.qos),h.push(b)}};if(Array.isArray(e)?e.forEach(P=>{this.log("subscribe: array topic %s",P),d(P)}):Object.keys(e).forEach(P=>{this.log("subscribe: object topic %s, %o",P,e[P]),d(P,e[P])}),!h.length)return n(null,[]),this;let m=(P,S)=>{let b={cmd:"subscribe",subscriptions:P,messageId:S};if(f&&(b.properties=f),this.options.resubscribe){this.log("subscribe :: resubscribe true");let _=[];P.forEach(R=>{if(this.options.reconnectPeriod>0){let T={qos:R.qos};i===5&&(T.nl=R.nl||!1,T.rap=R.rap||!1,T.rh=R.rh||0,T.properties=R.properties),this._resubscribeTopics[R.topic]=T,_.push(R.topic)}}),this.messageIdToTopic[b.messageId]=_}let w=new Promise((_,R)=>{this.outgoing[b.messageId]={volatile:!0,cb(T,y){if(!T){let{granted:O}=y;for(let v=0;v<O.length;v+=1)P[v].qos=O[v]}T?R(new bi.ErrorWithSubackPacket(T.message,y)):_(y)}}});return this.log("subscribe :: call _sendPacket"),this._sendPacket(b),w},g=()=>{let P=this.options.subscribeBatchSize??h.length,S=[];for(let b=0;b<h.length;b+=P){let w=h.slice(b,b+P),_=this._nextId();if(_===null)return this.log("No messageId left"),!1;S.push(m(w,_))}return Promise.all(S).then(b=>{n(null,h,b.at(-1))}).catch(b=>{n(b,h,b.packet)}),!0};return(this._storeProcessing||this._storeProcessingQueue.length>0||!g())&&this._storeProcessingQueue.push({invoke:g,callback:n}),this}subscribeAsync(e,r){return new Promise((n,i)=>{this.subscribe(e,r,(s,o)=>{s?i(s):n(o)})})}unsubscribe(e,r,n){typeof e=="string"&&(e=[e]),typeof r=="function"&&(n=r),n=n||this.noop;let i=Cg.validateTopics(e);if(i!==null)return Wu(n,new Error(`Invalid topic ${i}`)),this;if(this._checkDisconnecting(n))return this;let s=()=>{let o=this._nextId();if(o===null)return this.log("No messageId left"),!1;let a={cmd:"unsubscribe",messageId:o,unsubscriptions:[]};return typeof e=="string"?a.unsubscriptions=[e]:Array.isArray(e)&&(a.unsubscriptions=e),this.options.resubscribe&&a.unsubscriptions.forEach(c=>{delete this._resubscribeTopics[c]}),typeof r=="object"&&r.properties&&(a.properties=r.properties),this.outgoing[a.messageId]={volatile:!0,cb:n},this.log("unsubscribe: call _sendPacket"),this._sendPacket(a),!0};return(this._storeProcessing||this._storeProcessingQueue.length>0||!s())&&this._storeProcessingQueue.push({invoke:s,callback:n}),this}unsubscribeAsync(e,r){return new Promise((n,i)=>{this.unsubscribe(e,r,(s,o)=>{s?i(s):n(o)})})}end(e,r,n){this.log("end :: (%s)",this.options.clientId),(e==null||typeof e!="boolean")&&(n=n||r,r=e,e=!1),typeof r!="object"&&(n=n||r,r=null),this.log("end :: cb? %s",!!n),(!n||typeof n!="function")&&(n=this.noop);let i=()=>{this.log("end :: closeStores: closing incoming and outgoing stores"),this.disconnected=!0,this.incomingStore.close(o=>{this.outgoingStore.close(a=>{if(this.log("end :: closeStores: emitting end"),this.emit("end"),n){let c=o||a;this.log("end :: closeStores: invoking callback with args"),n(c)}})}),this._deferredReconnect?this._deferredReconnect():(this.options.reconnectPeriod===0||this.options.manualConnect)&&(this.disconnecting=!1)},s=()=>{this.log("end :: (%s) :: finish :: calling _cleanUp with force %s",this.options.clientId,e),this._cleanUp(e,()=>{this.log("end :: finish :: calling process.nextTick on closeStores"),(0,bi.nextTick)(i)},r)};return this.disconnecting?(n(),this):(this._clearReconnect(),this.disconnecting=!0,!e&&Object.keys(this.outgoing).length>0?(this.log("end :: (%s) :: calling finish in 10ms once outgoing is empty",this.options.clientId),this.once("outgoingEmpty",setTimeout.bind(null,s,10))):(this.log("end :: (%s) :: immediately calling finish",this.options.clientId),s()),this)}endAsync(e,r){return new Promise((n,i)=>{this.end(e,r,s=>{s?i(s):n()})})}removeOutgoingMessage(e){if(this.outgoing[e]){let{cb:r}=this.outgoing[e];this._removeOutgoingAndStoreMessage(e,()=>{r(new Error("Message removed"))})}return this}reconnect(e){this.log("client reconnect");let r=()=>{e?(this.options.incomingStore=e.incomingStore,this.options.outgoingStore=e.outgoingStore):(this.options.incomingStore=null,this.options.outgoingStore=null),this.incomingStore=this.options.incomingStore||new vn.default,this.outgoingStore=this.options.outgoingStore||new vn.default,this.disconnecting=!1,this.disconnected=!1,this._deferredReconnect=null,this._reconnect()};return this.disconnecting&&!this.disconnected?this._deferredReconnect=r:r(),this}_flushVolatile(){this.outgoing&&(this.log("_flushVolatile :: deleting volatile messages from the queue and setting their callbacks as error function"),Object.keys(this.outgoing).forEach(e=>{this.outgoing[e].volatile&&typeof this.outgoing[e].cb=="function"&&(this.outgoing[e].cb(new Error("Connection closed")),delete this.outgoing[e])}))}_flush(){this.outgoing&&(this.log("_flush: queue exists? %b",!!this.outgoing),Object.keys(this.outgoing).forEach(e=>{typeof this.outgoing[e].cb=="function"&&(this.outgoing[e].cb(new Error("Connection closed")),delete this.outgoing[e])}))}_removeTopicAliasAndRecoverTopicName(e){let r;e.properties&&(r=e.properties.topicAlias);let n=e.topic.toString();if(this.log("_removeTopicAliasAndRecoverTopicName :: alias %d, topic %o",r,n),n.length===0){if(typeof r>"u")return new Error("Unregistered Topic Alias");if(n=this.topicAliasSend.getTopicByAlias(r),typeof n>"u")return new Error("Unregistered Topic Alias");e.topic=n}r&&delete e.properties.topicAlias}_checkDisconnecting(e){return this.disconnecting&&(e&&e!==this.noop?e(new Error("client disconnecting")):this.emit("error",new Error("client disconnecting"))),this.disconnecting}_reconnect(){this.log("_reconnect: emitting reconnect to client"),this.emit("reconnect"),this.connected?(this.end(()=>{this.connect()}),this.log("client already connected. disconnecting first.")):(this.log("_reconnect: calling connect"),this.connect())}_setupReconnect(){!this.disconnecting&&!this.reconnectTimer&&this.options.reconnectPeriod>0?(this.reconnecting||(this.log("_setupReconnect :: emit `offline` state"),this.emit("offline"),this.log("_setupReconnect :: set `reconnecting` to `true`"),this.reconnecting=!0),this.log("_setupReconnect :: setting reconnectTimer for %d ms",this.options.reconnectPeriod),this.reconnectTimer=setInterval(()=>{this.log("reconnectTimer :: reconnect triggered!"),this._reconnect()},this.options.reconnectPeriod)):this.log("_setupReconnect :: doing nothing...")}_clearReconnect(){this.log("_clearReconnect : clearing reconnect timer"),this.reconnectTimer&&(clearInterval(this.reconnectTimer),this.reconnectTimer=null)}_cleanUp(e,r,n={}){if(r&&(this.log("_cleanUp :: done callback provided for on stream close"),this.stream.on("close",r)),this.log("_cleanUp :: forced? %s",e),e)this.options.reconnectPeriod===0&&this.options.clean&&this._flush(),this.log("_cleanUp :: (%s) :: destroying stream",this.options.clientId),this.stream.destroy();else{let i={cmd:"disconnect",...n};this.log("_cleanUp :: (%s) :: call _sendPacket with disconnect packet",this.options.clientId),this._sendPacket(i,()=>{this.log("_cleanUp :: (%s) :: destroying stream",this.options.clientId),Wu(()=>{this.stream.end(()=>{this.log("_cleanUp :: (%s) :: stream destroyed",this.options.clientId)})})})}!this.disconnecting&&!this.reconnecting&&(this.log("_cleanUp :: client not disconnecting/reconnecting. Clearing and resetting reconnect."),this._clearReconnect(),this._setupReconnect()),this._destroyKeepaliveManager(),r&&!this.connected&&(this.log("_cleanUp :: (%s) :: removing stream `done` callback `close` listener",this.options.clientId),this.stream.removeListener("close",r),r())}_storeAndSend(e,r,n){this.log("storeAndSend :: store packet with cmd %s to outgoingStore",e.cmd);let i=e,s;if(i.cmd==="publish"&&(i=(0,kg.default)(e),s=this._removeTopicAliasAndRecoverTopicName(i),s))return r&&r(s);this.outgoingStore.put(i,o=>{if(o)return r&&r(o);n(),this._writePacket(e,r)})}_applyTopicAlias(e){if(this.options.protocolVersion===5&&e.cmd==="publish"){let r;e.properties&&(r=e.properties.topicAlias);let n=e.topic.toString();if(this.topicAliasSend)if(r){if(n.length!==0&&(this.log("applyTopicAlias :: register topic: %s - alias: %d",n,r),!this.topicAliasSend.put(n,r)))return this.log("applyTopicAlias :: error out of range. topic: %s - alias: %d",n,r),new Error("Sending Topic Alias out of range")}else n.length!==0&&(this.options.autoAssignTopicAlias?(r=this.topicAliasSend.getAliasByTopic(n),r?(e.topic="",e.properties={...e.properties,topicAlias:r},this.log("applyTopicAlias :: auto assign(use) topic: %s - alias: %d",n,r)):(r=this.topicAliasSend.getLruAlias(),this.topicAliasSend.put(n,r),e.properties={...e.properties,topicAlias:r},this.log("applyTopicAlias :: auto assign topic: %s - alias: %d",n,r))):this.options.autoUseTopicAlias&&(r=this.topicAliasSend.getAliasByTopic(n),r&&(e.topic="",e.properties={...e.properties,topicAlias:r},this.log("applyTopicAlias :: auto use topic: %s - alias: %d",n,r))));else if(r)return this.log("applyTopicAlias :: error out of range. topic: %s - alias: %d",n,r),new Error("Sending Topic Alias out of range")}}_noop(e){this.log("noop ::",e)}_writePacket(e,r){this.log("_writePacket :: packet: %O",e),this.log("_writePacket :: emitting `packetsend`"),this.emit("packetsend",e),this.log("_writePacket :: writing to stream");let n=Fu.default.writeToStream(e,this.stream,this.options);this.log("_writePacket :: writeToStream result %s",n),!n&&r&&r!==this.noop?(this.log("_writePacket :: handle events on `drain` once through callback."),this.stream.once("drain",r)):r&&(this.log("_writePacket :: invoking cb"),r())}_sendPacket(e,r,n,i){this.log("_sendPacket :: (%s) ::  start",this.options.clientId),n=n||this.noop,r=r||this.noop;let s=this._applyTopicAlias(e);if(s){r(s);return}if(!this.connected){if(e.cmd==="auth"){this._writePacket(e,r);return}this.log("_sendPacket :: client not connected. Storing packet offline."),this._storePacket(e,r,n);return}if(i){this._writePacket(e,r);return}switch(e.cmd){case"publish":break;case"pubrel":this._storeAndSend(e,r,n);return;default:this._writePacket(e,r);return}switch(e.qos){case 2:case 1:this._storeAndSend(e,r,n);break;case 0:default:this._writePacket(e,r);break}this.log("_sendPacket :: (%s) ::  end",this.options.clientId)}_storePacket(e,r,n){this.log("_storePacket :: packet: %o",e),this.log("_storePacket :: cb? %s",!!r),n=n||this.noop;let i=e;if(i.cmd==="publish"){i=(0,kg.default)(e);let o=this._removeTopicAliasAndRecoverTopicName(i);if(o)return r&&r(o)}let s=i.qos||0;s===0&&this.queueQoSZero||i.cmd!=="publish"?this.queue.push({packet:i,cb:r}):s>0?(r=this.outgoing[i.messageId]?this.outgoing[i.messageId].cb:null,this.outgoingStore.put(i,o=>{if(o)return r&&r(o);n()})):r&&r(new Error("No connection to broker"))}_setupKeepaliveManager(){this.log("_setupKeepaliveManager :: keepalive %d 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jl=vi&&vi.__importDefault||function(t){return t&&t.__esModule?t:{default:t}};Object.defineProperty(vi,"__esModule",{value:!0});var cT=jl((Ul(),me(Ll))),fT=jl(At()),hT=jl(Dl()),dT=(0,fT.default)("mqttjs:tcp"),pT=(t,e)=>{if(e.port=e.port||1883,e.hostname=e.hostname||e.host||"localhost",e.socksProxy)return(0,hT.default)(e.hostname,e.port,e.socksProxy,{timeout:e.socksTimeout});let{port:r,path:n}=e,i=e.hostname;return dT("port %d and host %s",r,i),cT.default.createConnection({port:r,host:i,path:n})};vi.default=pT});var Nb={};Kr(Nb,{default:()=>yT});var yT,qb=ze(()=>{A();x();I();yT={}});var $l=j(Si=>{"use strict";A();x();I();var Wl=Si&&Si.__importDefault||function(t){return t&&t.__esModule?t:{default:t}};Object.defineProperty(Si,"__esModule",{value:!0});var Lb=(qb(),me(Nb)),gT=Wl((Ul(),me(Ll))),bT=Wl(At()),wT=Wl(Dl()),mT=(0,bT.default)("mqttjs:tls");function _T(t){let{host:e,port:r,socksProxy:n,...i}=t;if(n!==void 0){let s=(0,wT.default)(e,r,n,{timeout:t.socksTimeout});return(0,Lb.connect)({...i,socket:s})}return(0,Lb.connect)(t)}var vT=(t,e)=>{e.port=e.port||8883,e.host=e.hostname||e.host||"localhost",gT.default.isIP(e.host)===0&&(e.servername=e.host),e.rejectUnauthorized=e.rejectUnauthorized!==!1,delete e.path,mT("port %d host %s rejectUnauthorized %b",e.port,e.host,e.rejectUnauthorized);let r=_T(e);r.on("secureConnect",()=>{e.rejectUnauthorized&&!r.authorized?r.emit("error",new Error("TLS not authorized")):r.removeListener("error",n)});function n(i){e.rejectUnauthorized&&t.emit("error",i),r.end()}return r.on("error",n),r};Si.default=vT});var Gl=j(Vl=>{"use strict";A();x();I();Object.defineProperty(Vl,"__esModule",{value:!0});var Ub=(ke(),me(qe)),ST=or(),ET=Qo(),kt,Hl,Xe;function AT(){let t=new ST.Transform;return t._write=(e,r,n)=>{kt.send({data:e.buffer,success(){n()},fail(i){n(new Error(i))}})},t._flush=e=>{kt.close({success(){e()}})},t}function IT(t){t.hostname||(t.hostname="localhost"),t.path||(t.path="/"),t.wsOptions||(t.wsOptions={})}function xT(t,e){let r=t.protocol==="wxs"?"wss":"ws",n=`${r}://${t.hostname}${t.path}`;return t.port&&t.port!==80&&t.port!==443&&(n=`${r}://${t.hostname}:${t.port}${t.path}`),typeof t.transformWsUrl=="function"&&(n=t.transformWsUrl(n,t,e)),n}function TT(){kt.onOpen(()=>{Xe.socketReady()}),kt.onMessage(t=>{let{data:e}=t;e instanceof ArrayBuffer?e=Ub.Buffer.from(e):e=Ub.Buffer.from(e,"utf8"),Hl.push(e)}),kt.onClose(()=>{Xe.emit("close"),Xe.end(),Xe.destroy()}),kt.onError(t=>{let e=new Error(t.errMsg);Xe.destroy(e)})}var PT=(t,e)=>{if(e.hostname=e.hostname||e.host,!e.hostname)throw new Error("Could not determine host. 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i=LT.default.parse(t,!0),s={};if(i.port!=null&&(s.port=Number(i.port)),s.host=i.hostname,s.query=i.query,s.auth=i.auth,s.protocol=i.protocol,s.path=i.path,e={...s,...e},!e.protocol)throw new Error("Missing protocol");e.protocol=e.protocol.replace(/:$/,"")}if(e.unixSocket=e.unixSocket||e.protocol?.includes("+unix"),e.unixSocket?e.protocol=e.protocol.replace("+unix",""):!e.protocol?.startsWith("ws")&&!e.protocol?.startsWith("wx")&&delete e.path,DT(e),e.query&&typeof e.query.clientId=="string"&&(e.clientId=e.query.clientId),jb.default||e.unixSocket?e.socksProxy=void 0:e.socksProxy===void 0&&typeof N<"u"&&(e.socksProxy=N.env.MQTTJS_SOCKS_PROXY),e.cert&&e.key)if(e.protocol){if(["mqtts","wss","wxs","alis"].indexOf(e.protocol)===-1)switch(e.protocol){case"mqtt":e.protocol="mqtts";break;case"ws":e.protocol="wss";break;case"wx":e.protocol="wxs";break;case"ali":e.protocol="alis";break;default:throw new Error(`Unknown protocol for secure connection: "${e.protocol}"!`)}}else throw new 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e.servers&&((!i._reconnectCount||i._reconnectCount===e.servers.length)&&(i._reconnectCount=0),e.host=e.servers[i._reconnectCount].host,e.port=e.servers[i._reconnectCount].port,e.protocol=e.servers[i._reconnectCount].protocol?e.servers[i._reconnectCount].protocol:e.defaultProtocol,e.hostname=e.host,i._reconnectCount++),Fb("calling streambuilder for",e.protocol),Me[e.protocol](i,e)}let n=new UT.default(r,e);return n.on("error",()=>{}),n}function jT(t,e,r=!0){return new Promise((n,i)=>{let s=Wb(t,e),o={connect:c=>{a(),n(s)},end:()=>{a(),n(s)},error:c=>{a(),s.end(),i(c)}};r===!1&&(o.close=()=>{o.error(new Error("Couldn't connect to server"))});function a(){Object.keys(o).forEach(c=>{s.off(c,o[c])})}Object.keys(o).forEach(c=>{s.on(c,o[c])})})}In.default=Wb});var Jl=j(ge=>{"use strict";A();x();I();var Hb=ge&&ge.__createBinding||(Object.create?(function(t,e,r,n){n===void 0&&(n=r);var i=Object.getOwnPropertyDescriptor(e,r);(!i||("get"in i?!e.__esModule:i.writable||i.configurable))&&(i={enumerable:!0,get:function(){return e[r]}}),Object.defineProperty(t,n,i)}):(function(t,e,r,n){n===void 0&&(n=r),t[n]=e[r]})),FT=ge&&ge.__setModuleDefault||(Object.create?(function(t,e){Object.defineProperty(t,"default",{enumerable:!0,value:e})}):function(t,e){t.default=e}),WT=ge&&ge.__importStar||(function(){var t=function(e){return t=Object.getOwnPropertyNames||function(r){var n=[];for(var i in r)Object.prototype.hasOwnProperty.call(r,i)&&(n[n.length]=i);return n},t(e)};return function(e){if(e&&e.__esModule)return e;var r={};if(e!=null)for(var n=t(e),i=0;i<n.length;i++)n[i]!=="default"&&Hb(r,e,n[i]);return FT(r,e),r}})(),Yl=ge&&ge.__exportStar||function(t,e){for(var r in t)r!=="default"&&!Object.prototype.hasOwnProperty.call(e,r)&&Hb(e,t,r)},Ai=ge&&ge.__importDefault||function(t){return t&&t.__esModule?t:{default:t}};Object.defineProperty(ge,"__esModule",{value:!0});ge.ReasonCodes=ge.KeepaliveManager=ge.UniqueMessageIdProvider=ge.DefaultMessageIdProvider=ge.Store=ge.MqttClient=ge.connectAsync=ge.connect=ge.Client=void 0;var Vb=Ai(zo());ge.MqttClient=Vb.default;var $T=Ai(Iu());ge.DefaultMessageIdProvider=$T.default;var HT=Ai(qg());ge.UniqueMessageIdProvider=HT.default;var VT=Ai(Ua());ge.Store=VT.default;var Gb=WT($b());ge.connect=Gb.default;Object.defineProperty(ge,"connectAsync",{enumerable:!0,get:function(){return Gb.connectAsync}});var GT=Ai(ju());ge.KeepaliveManager=GT.default;ge.Client=Vb.default;Yl(zo(),ge);Yl(Mr(),ge);Yl(Na(),ge);var zT=zn();Object.defineProperty(ge,"ReasonCodes",{enumerable:!0,get:function(){return zT.ReasonCodes}})});var XT=j(ot=>{A();x();I();var zb=ot&&ot.__createBinding||(Object.create?(function(t,e,r,n){n===void 0&&(n=r);var i=Object.getOwnPropertyDescriptor(e,r);(!i||("get"in i?!e.__esModule:i.writable||i.configurable))&&(i={enumerable:!0,get:function(){return e[r]}}),Object.defineProperty(t,n,i)}):(function(t,e,r,n){n===void 0&&(n=r),t[n]=e[r]})),KT=ot&&ot.__setModuleDefault||(Object.create?(function(t,e){Object.defineProperty(t,"default",{enumerable:!0,value:e})}):function(t,e){t.default=e}),QT=ot&&ot.__importStar||(function(){var t=function(e){return t=Object.getOwnPropertyNames||function(r){var n=[];for(var i in r)Object.prototype.hasOwnProperty.call(r,i)&&(n[n.length]=i);return n},t(e)};return function(e){if(e&&e.__esModule)return e;var r={};if(e!=null)for(var n=t(e),i=0;i<n.length;i++)n[i]!=="default"&&zb(r,e,n[i]);return KT(r,e),r}})(),YT=ot&&ot.__exportStar||function(t,e){for(var r in t)r!=="default"&&!Object.prototype.hasOwnProperty.call(e,r)&&zb(e,t,r)};Object.defineProperty(ot,"__esModule",{value:!0});var JT=QT(Jl());ot.default=JT;YT(Jl(),ot)});export default XT();
+/*! Bundled license information:
+
+@jspm/core/nodelibs/browser/chunk-DtuTasat.js:
+  (*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> *)
+
+safe-buffer/index.js:
+  (*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> *)
+
+@babel/runtime/helpers/regenerator.js:
+  (*! regenerator-runtime -- Copyright (c) 2014-present, Facebook, Inc. -- license (MIT): https://github.com/babel/babel/blob/main/packages/babel-helpers/LICENSE *)
+*/
diff --git a/mqtt-backend/node_modules/mqtt/dist/mqtt.js b/mqtt-backend/node_modules/mqtt/dist/mqtt.js
new file mode 100644
index 0000000..f905066
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt/dist/mqtt.js
@@ -0,0 +1,23933 @@
+"use strict";
+var mqtt = (() => {
+  var __defProp = Object.defineProperty;
+  var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
+  var __getOwnPropNames = Object.getOwnPropertyNames;
+  var __hasOwnProp = Object.prototype.hasOwnProperty;
+  var __esm = (fn, res) => function __init() {
+    return fn && (res = (0, fn[__getOwnPropNames(fn)[0]])(fn = 0)), res;
+  };
+  var __commonJS = (cb, mod) => function __require() {
+    return mod || (0, cb[__getOwnPropNames(cb)[0]])((mod = { exports: {} }).exports, mod), mod.exports;
+  };
+  var __export = (target, all) => {
+    for (var name2 in all)
+      __defProp(target, name2, { get: all[name2], enumerable: true });
+  };
+  var __copyProps = (to, from, except, desc) => {
+    if (from && typeof from === "object" || typeof from === "function") {
+      for (let key of __getOwnPropNames(from))
+        if (!__hasOwnProp.call(to, key) && key !== except)
+          __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
+    }
+    return to;
+  };
+  var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
+
+  // node_modules/esbuild-plugin-polyfill-node/polyfills/__dirname.js
+  var init_dirname = __esm({
+    "node_modules/esbuild-plugin-polyfill-node/polyfills/__dirname.js"() {
+    }
+  });
+
+  // node_modules/@jspm/core/nodelibs/browser/process.js
+  var process_exports = {};
+  __export(process_exports, {
+    _debugEnd: () => _debugEnd,
+    _debugProcess: () => _debugProcess,
+    _events: () => _events,
+    _eventsCount: () => _eventsCount,
+    _exiting: () => _exiting,
+    _fatalExceptions: () => _fatalExceptions,
+    _getActiveHandles: () => _getActiveHandles,
+    _getActiveRequests: () => _getActiveRequests,
+    _kill: () => _kill,
+    _linkedBinding: () => _linkedBinding,
+    _maxListeners: () => _maxListeners,
+    _preload_modules: () => _preload_modules,
+    _rawDebug: () => _rawDebug,
+    _startProfilerIdleNotifier: () => _startProfilerIdleNotifier,
+    _stopProfilerIdleNotifier: () => _stopProfilerIdleNotifier,
+    _tickCallback: () => _tickCallback,
+    abort: () => abort,
+    addListener: () => addListener,
+    allowedNodeEnvironmentFlags: () => allowedNodeEnvironmentFlags,
+    arch: () => arch,
+    argv: () => argv,
+    argv0: () => argv0,
+    assert: () => assert,
+    binding: () => binding,
+    browser: () => browser,
+    chdir: () => chdir,
+    config: () => config,
+    cpuUsage: () => cpuUsage,
+    cwd: () => cwd,
+    debugPort: () => debugPort,
+    default: () => process,
+    dlopen: () => dlopen,
+    domain: () => domain,
+    emit: () => emit,
+    emitWarning: () => emitWarning,
+    env: () => env,
+    execArgv: () => execArgv,
+    execPath: () => execPath,
+    exit: () => exit,
+    features: () => features,
+    hasUncaughtExceptionCaptureCallback: () => hasUncaughtExceptionCaptureCallback,
+    hrtime: () => hrtime,
+    kill: () => kill,
+    listeners: () => listeners,
+    memoryUsage: () => memoryUsage,
+    moduleLoadList: () => moduleLoadList,
+    nextTick: () => nextTick,
+    off: () => off,
+    on: () => on,
+    once: () => once,
+    openStdin: () => openStdin,
+    pid: () => pid,
+    platform: () => platform,
+    ppid: () => ppid,
+    prependListener: () => prependListener,
+    prependOnceListener: () => prependOnceListener,
+    reallyExit: () => reallyExit,
+    release: () => release,
+    removeAllListeners: () => removeAllListeners,
+    removeListener: () => removeListener,
+    resourceUsage: () => resourceUsage,
+    setSourceMapsEnabled: () => setSourceMapsEnabled,
+    setUncaughtExceptionCaptureCallback: () => setUncaughtExceptionCaptureCallback,
+    stderr: () => stderr,
+    stdin: () => stdin,
+    stdout: () => stdout,
+    title: () => title,
+    umask: () => umask,
+    uptime: () => uptime,
+    version: () => version,
+    versions: () => versions
+  });
+  function unimplemented(name2) {
+    throw new Error("Node.js process " + name2 + " is not supported by JSPM core outside of Node.js");
+  }
+  function cleanUpNextTick() {
+    if (!draining || !currentQueue)
+      return;
+    draining = false;
+    if (currentQueue.length) {
+      queue = currentQueue.concat(queue);
+    } else {
+      queueIndex = -1;
+    }
+    if (queue.length)
+      drainQueue();
+  }
+  function drainQueue() {
+    if (draining)
+      return;
+    var timeout = setTimeout(cleanUpNextTick, 0);
+    draining = true;
+    var len = queue.length;
+    while (len) {
+      currentQueue = queue;
+      queue = [];
+      while (++queueIndex < len) {
+        if (currentQueue)
+          currentQueue[queueIndex].run();
+      }
+      queueIndex = -1;
+      len = queue.length;
+    }
+    currentQueue = null;
+    draining = false;
+    clearTimeout(timeout);
+  }
+  function nextTick(fun) {
+    var args = new Array(arguments.length - 1);
+    if (arguments.length > 1) {
+      for (var i = 1; i < arguments.length; i++)
+        args[i - 1] = arguments[i];
+    }
+    queue.push(new Item(fun, args));
+    if (queue.length === 1 && !draining)
+      setTimeout(drainQueue, 0);
+  }
+  function Item(fun, array) {
+    this.fun = fun;
+    this.array = array;
+  }
+  function noop() {
+  }
+  function _linkedBinding(name2) {
+    unimplemented("_linkedBinding");
+  }
+  function dlopen(name2) {
+    unimplemented("dlopen");
+  }
+  function _getActiveRequests() {
+    return [];
+  }
+  function _getActiveHandles() {
+    return [];
+  }
+  function assert(condition, message) {
+    if (!condition) throw new Error(message || "assertion error");
+  }
+  function hasUncaughtExceptionCaptureCallback() {
+    return false;
+  }
+  function uptime() {
+    return _performance.now() / 1e3;
+  }
+  function hrtime(previousTimestamp) {
+    var baseNow = Math.floor((Date.now() - _performance.now()) * 1e-3);
+    var clocktime = _performance.now() * 1e-3;
+    var seconds = Math.floor(clocktime) + baseNow;
+    var nanoseconds = Math.floor(clocktime % 1 * 1e9);
+    if (previousTimestamp) {
+      seconds = seconds - previousTimestamp[0];
+      nanoseconds = nanoseconds - previousTimestamp[1];
+      if (nanoseconds < 0) {
+        seconds--;
+        nanoseconds += nanoPerSec;
+      }
+    }
+    return [seconds, nanoseconds];
+  }
+  function on() {
+    return process;
+  }
+  function listeners(name2) {
+    return [];
+  }
+  var queue, draining, currentQueue, queueIndex, title, arch, platform, env, argv, execArgv, version, versions, emitWarning, binding, umask, cwd, chdir, release, browser, _rawDebug, moduleLoadList, domain, _exiting, config, reallyExit, _kill, cpuUsage, resourceUsage, memoryUsage, kill, exit, openStdin, allowedNodeEnvironmentFlags, features, _fatalExceptions, setUncaughtExceptionCaptureCallback, _tickCallback, _debugProcess, _debugEnd, _startProfilerIdleNotifier, _stopProfilerIdleNotifier, stdout, stderr, stdin, abort, pid, ppid, execPath, debugPort, argv0, _preload_modules, setSourceMapsEnabled, _performance, nowOffset, nanoPerSec, _maxListeners, _events, _eventsCount, addListener, once, off, removeListener, removeAllListeners, emit, prependListener, prependOnceListener, process;
+  var init_process = __esm({
+    "node_modules/@jspm/core/nodelibs/browser/process.js"() {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      queue = [];
+      draining = false;
+      queueIndex = -1;
+      Item.prototype.run = function() {
+        this.fun.apply(null, this.array);
+      };
+      title = "browser";
+      arch = "x64";
+      platform = "browser";
+      env = {
+        PATH: "/usr/bin",
+        LANG: typeof navigator !== "undefined" ? navigator.language + ".UTF-8" : void 0,
+        PWD: "/",
+        HOME: "/home",
+        TMP: "/tmp"
+      };
+      argv = ["/usr/bin/node"];
+      execArgv = [];
+      version = "v16.8.0";
+      versions = {};
+      emitWarning = function(message, type) {
+        console.warn((type ? type + ": " : "") + message);
+      };
+      binding = function(name2) {
+        unimplemented("binding");
+      };
+      umask = function(mask) {
+        return 0;
+      };
+      cwd = function() {
+        return "/";
+      };
+      chdir = function(dir) {
+      };
+      release = {
+        name: "node",
+        sourceUrl: "",
+        headersUrl: "",
+        libUrl: ""
+      };
+      browser = true;
+      _rawDebug = noop;
+      moduleLoadList = [];
+      domain = {};
+      _exiting = false;
+      config = {};
+      reallyExit = noop;
+      _kill = noop;
+      cpuUsage = function() {
+        return {};
+      };
+      resourceUsage = cpuUsage;
+      memoryUsage = cpuUsage;
+      kill = noop;
+      exit = noop;
+      openStdin = noop;
+      allowedNodeEnvironmentFlags = {};
+      features = {
+        inspector: false,
+        debug: false,
+        uv: false,
+        ipv6: false,
+        tls_alpn: false,
+        tls_sni: false,
+        tls_ocsp: false,
+        tls: false,
+        cached_builtins: true
+      };
+      _fatalExceptions = noop;
+      setUncaughtExceptionCaptureCallback = noop;
+      _tickCallback = noop;
+      _debugProcess = noop;
+      _debugEnd = noop;
+      _startProfilerIdleNotifier = noop;
+      _stopProfilerIdleNotifier = noop;
+      stdout = void 0;
+      stderr = void 0;
+      stdin = void 0;
+      abort = noop;
+      pid = 2;
+      ppid = 1;
+      execPath = "/bin/usr/node";
+      debugPort = 9229;
+      argv0 = "node";
+      _preload_modules = [];
+      setSourceMapsEnabled = noop;
+      _performance = {
+        now: typeof performance !== "undefined" ? performance.now.bind(performance) : void 0,
+        timing: typeof performance !== "undefined" ? performance.timing : void 0
+      };
+      if (_performance.now === void 0) {
+        nowOffset = Date.now();
+        if (_performance.timing && _performance.timing.navigationStart) {
+          nowOffset = _performance.timing.navigationStart;
+        }
+        _performance.now = () => Date.now() - nowOffset;
+      }
+      nanoPerSec = 1e9;
+      hrtime.bigint = function(time) {
+        var diff = hrtime(time);
+        if (typeof BigInt === "undefined") {
+          return diff[0] * nanoPerSec + diff[1];
+        }
+        return BigInt(diff[0] * nanoPerSec) + BigInt(diff[1]);
+      };
+      _maxListeners = 10;
+      _events = {};
+      _eventsCount = 0;
+      addListener = on;
+      once = on;
+      off = on;
+      removeListener = on;
+      removeAllListeners = on;
+      emit = noop;
+      prependListener = on;
+      prependOnceListener = on;
+      process = {
+        version,
+        versions,
+        arch,
+        platform,
+        browser,
+        release,
+        _rawDebug,
+        moduleLoadList,
+        binding,
+        _linkedBinding,
+        _events,
+        _eventsCount,
+        _maxListeners,
+        on,
+        addListener,
+        once,
+        off,
+        removeListener,
+        removeAllListeners,
+        emit,
+        prependListener,
+        prependOnceListener,
+        listeners,
+        domain,
+        _exiting,
+        config,
+        dlopen,
+        uptime,
+        _getActiveRequests,
+        _getActiveHandles,
+        reallyExit,
+        _kill,
+        cpuUsage,
+        resourceUsage,
+        memoryUsage,
+        kill,
+        exit,
+        openStdin,
+        allowedNodeEnvironmentFlags,
+        assert,
+        features,
+        _fatalExceptions,
+        setUncaughtExceptionCaptureCallback,
+        hasUncaughtExceptionCaptureCallback,
+        emitWarning,
+        nextTick,
+        _tickCallback,
+        _debugProcess,
+        _debugEnd,
+        _startProfilerIdleNotifier,
+        _stopProfilerIdleNotifier,
+        stdout,
+        stdin,
+        stderr,
+        abort,
+        umask,
+        chdir,
+        cwd,
+        env,
+        title,
+        argv,
+        execArgv,
+        pid,
+        ppid,
+        execPath,
+        debugPort,
+        hrtime,
+        argv0,
+        _preload_modules,
+        setSourceMapsEnabled
+      };
+    }
+  });
+
+  // node_modules/esbuild-plugin-polyfill-node/polyfills/process.js
+  var init_process2 = __esm({
+    "node_modules/esbuild-plugin-polyfill-node/polyfills/process.js"() {
+      init_process();
+    }
+  });
+
+  // node_modules/@jspm/core/nodelibs/browser/chunk-DtuTasat.js
+  function dew$2() {
+    if (_dewExec$2) return exports$2;
+    _dewExec$2 = true;
+    exports$2.byteLength = byteLength;
+    exports$2.toByteArray = toByteArray;
+    exports$2.fromByteArray = fromByteArray;
+    var lookup = [];
+    var revLookup = [];
+    var Arr = typeof Uint8Array !== "undefined" ? Uint8Array : Array;
+    var code = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    for (var i = 0, len = code.length; i < len; ++i) {
+      lookup[i] = code[i];
+      revLookup[code.charCodeAt(i)] = i;
+    }
+    revLookup["-".charCodeAt(0)] = 62;
+    revLookup["_".charCodeAt(0)] = 63;
+    function getLens(b64) {
+      var len2 = b64.length;
+      if (len2 % 4 > 0) {
+        throw new Error("Invalid string. Length must be a multiple of 4");
+      }
+      var validLen = b64.indexOf("=");
+      if (validLen === -1) validLen = len2;
+      var placeHoldersLen = validLen === len2 ? 0 : 4 - validLen % 4;
+      return [validLen, placeHoldersLen];
+    }
+    function byteLength(b64) {
+      var lens = getLens(b64);
+      var validLen = lens[0];
+      var placeHoldersLen = lens[1];
+      return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;
+    }
+    function _byteLength(b64, validLen, placeHoldersLen) {
+      return (validLen + placeHoldersLen) * 3 / 4 - placeHoldersLen;
+    }
+    function toByteArray(b64) {
+      var tmp;
+      var lens = getLens(b64);
+      var validLen = lens[0];
+      var placeHoldersLen = lens[1];
+      var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen));
+      var curByte = 0;
+      var len2 = placeHoldersLen > 0 ? validLen - 4 : validLen;
+      var i2;
+      for (i2 = 0; i2 < len2; i2 += 4) {
+        tmp = revLookup[b64.charCodeAt(i2)] << 18 | revLookup[b64.charCodeAt(i2 + 1)] << 12 | revLookup[b64.charCodeAt(i2 + 2)] << 6 | revLookup[b64.charCodeAt(i2 + 3)];
+        arr[curByte++] = tmp >> 16 & 255;
+        arr[curByte++] = tmp >> 8 & 255;
+        arr[curByte++] = tmp & 255;
+      }
+      if (placeHoldersLen === 2) {
+        tmp = revLookup[b64.charCodeAt(i2)] << 2 | revLookup[b64.charCodeAt(i2 + 1)] >> 4;
+        arr[curByte++] = tmp & 255;
+      }
+      if (placeHoldersLen === 1) {
+        tmp = revLookup[b64.charCodeAt(i2)] << 10 | revLookup[b64.charCodeAt(i2 + 1)] << 4 | revLookup[b64.charCodeAt(i2 + 2)] >> 2;
+        arr[curByte++] = tmp >> 8 & 255;
+        arr[curByte++] = tmp & 255;
+      }
+      return arr;
+    }
+    function tripletToBase64(num) {
+      return lookup[num >> 18 & 63] + lookup[num >> 12 & 63] + lookup[num >> 6 & 63] + lookup[num & 63];
+    }
+    function encodeChunk(uint8, start, end) {
+      var tmp;
+      var output = [];
+      for (var i2 = start; i2 < end; i2 += 3) {
+        tmp = (uint8[i2] << 16 & 16711680) + (uint8[i2 + 1] << 8 & 65280) + (uint8[i2 + 2] & 255);
+        output.push(tripletToBase64(tmp));
+      }
+      return output.join("");
+    }
+    function fromByteArray(uint8) {
+      var tmp;
+      var len2 = uint8.length;
+      var extraBytes = len2 % 3;
+      var parts = [];
+      var maxChunkLength = 16383;
+      for (var i2 = 0, len22 = len2 - extraBytes; i2 < len22; i2 += maxChunkLength) {
+        parts.push(encodeChunk(uint8, i2, i2 + maxChunkLength > len22 ? len22 : i2 + maxChunkLength));
+      }
+      if (extraBytes === 1) {
+        tmp = uint8[len2 - 1];
+        parts.push(lookup[tmp >> 2] + lookup[tmp << 4 & 63] + "==");
+      } else if (extraBytes === 2) {
+        tmp = (uint8[len2 - 2] << 8) + uint8[len2 - 1];
+        parts.push(lookup[tmp >> 10] + lookup[tmp >> 4 & 63] + lookup[tmp << 2 & 63] + "=");
+      }
+      return parts.join("");
+    }
+    return exports$2;
+  }
+  function dew$1() {
+    if (_dewExec$1) return exports$1;
+    _dewExec$1 = true;
+    exports$1.read = function(buffer, offset, isLE, mLen, nBytes) {
+      var e, m;
+      var eLen = nBytes * 8 - mLen - 1;
+      var eMax = (1 << eLen) - 1;
+      var eBias = eMax >> 1;
+      var nBits = -7;
+      var i = isLE ? nBytes - 1 : 0;
+      var d = isLE ? -1 : 1;
+      var s = buffer[offset + i];
+      i += d;
+      e = s & (1 << -nBits) - 1;
+      s >>= -nBits;
+      nBits += eLen;
+      for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {
+      }
+      m = e & (1 << -nBits) - 1;
+      e >>= -nBits;
+      nBits += mLen;
+      for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {
+      }
+      if (e === 0) {
+        e = 1 - eBias;
+      } else if (e === eMax) {
+        return m ? NaN : (s ? -1 : 1) * Infinity;
+      } else {
+        m = m + Math.pow(2, mLen);
+        e = e - eBias;
+      }
+      return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
+    };
+    exports$1.write = function(buffer, value, offset, isLE, mLen, nBytes) {
+      var e, m, c;
+      var eLen = nBytes * 8 - mLen - 1;
+      var eMax = (1 << eLen) - 1;
+      var eBias = eMax >> 1;
+      var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;
+      var i = isLE ? 0 : nBytes - 1;
+      var d = isLE ? 1 : -1;
+      var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
+      value = Math.abs(value);
+      if (isNaN(value) || value === Infinity) {
+        m = isNaN(value) ? 1 : 0;
+        e = eMax;
+      } else {
+        e = Math.floor(Math.log(value) / Math.LN2);
+        if (value * (c = Math.pow(2, -e)) < 1) {
+          e--;
+          c *= 2;
+        }
+        if (e + eBias >= 1) {
+          value += rt / c;
+        } else {
+          value += rt * Math.pow(2, 1 - eBias);
+        }
+        if (value * c >= 2) {
+          e++;
+          c /= 2;
+        }
+        if (e + eBias >= eMax) {
+          m = 0;
+          e = eMax;
+        } else if (e + eBias >= 1) {
+          m = (value * c - 1) * Math.pow(2, mLen);
+          e = e + eBias;
+        } else {
+          m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
+          e = 0;
+        }
+      }
+      for (; mLen >= 8; buffer[offset + i] = m & 255, i += d, m /= 256, mLen -= 8) {
+      }
+      e = e << mLen | m;
+      eLen += mLen;
+      for (; eLen > 0; buffer[offset + i] = e & 255, i += d, e /= 256, eLen -= 8) {
+      }
+      buffer[offset + i - d] |= s * 128;
+    };
+    return exports$1;
+  }
+  function dew() {
+    if (_dewExec) return exports;
+    _dewExec = true;
+    const base64 = dew$2();
+    const ieee754 = dew$1();
+    const customInspectSymbol = typeof Symbol === "function" && typeof Symbol["for"] === "function" ? Symbol["for"]("nodejs.util.inspect.custom") : null;
+    exports.Buffer = Buffer3;
+    exports.SlowBuffer = SlowBuffer;
+    exports.INSPECT_MAX_BYTES = 50;
+    const K_MAX_LENGTH = 2147483647;
+    exports.kMaxLength = K_MAX_LENGTH;
+    Buffer3.TYPED_ARRAY_SUPPORT = typedArraySupport();
+    if (!Buffer3.TYPED_ARRAY_SUPPORT && typeof console !== "undefined" && typeof console.error === "function") {
+      console.error("This browser lacks typed array (Uint8Array) support which is required by `buffer` v5.x. Use `buffer` v4.x if you require old browser support.");
+    }
+    function typedArraySupport() {
+      try {
+        const arr = new Uint8Array(1);
+        const proto = {
+          foo: function() {
+            return 42;
+          }
+        };
+        Object.setPrototypeOf(proto, Uint8Array.prototype);
+        Object.setPrototypeOf(arr, proto);
+        return arr.foo() === 42;
+      } catch (e) {
+        return false;
+      }
+    }
+    Object.defineProperty(Buffer3.prototype, "parent", {
+      enumerable: true,
+      get: function() {
+        if (!Buffer3.isBuffer(this)) return void 0;
+        return this.buffer;
+      }
+    });
+    Object.defineProperty(Buffer3.prototype, "offset", {
+      enumerable: true,
+      get: function() {
+        if (!Buffer3.isBuffer(this)) return void 0;
+        return this.byteOffset;
+      }
+    });
+    function createBuffer(length) {
+      if (length > K_MAX_LENGTH) {
+        throw new RangeError('The value "' + length + '" is invalid for option "size"');
+      }
+      const buf = new Uint8Array(length);
+      Object.setPrototypeOf(buf, Buffer3.prototype);
+      return buf;
+    }
+    function Buffer3(arg, encodingOrOffset, length) {
+      if (typeof arg === "number") {
+        if (typeof encodingOrOffset === "string") {
+          throw new TypeError('The "string" argument must be of type string. Received type number');
+        }
+        return allocUnsafe(arg);
+      }
+      return from(arg, encodingOrOffset, length);
+    }
+    Buffer3.poolSize = 8192;
+    function from(value, encodingOrOffset, length) {
+      if (typeof value === "string") {
+        return fromString(value, encodingOrOffset);
+      }
+      if (ArrayBuffer.isView(value)) {
+        return fromArrayView(value);
+      }
+      if (value == null) {
+        throw new TypeError("The first argument must be one of type string, Buffer, ArrayBuffer, Array, or Array-like Object. Received type " + typeof value);
+      }
+      if (isInstance(value, ArrayBuffer) || value && isInstance(value.buffer, ArrayBuffer)) {
+        return fromArrayBuffer(value, encodingOrOffset, length);
+      }
+      if (typeof SharedArrayBuffer !== "undefined" && (isInstance(value, SharedArrayBuffer) || value && isInstance(value.buffer, SharedArrayBuffer))) {
+        return fromArrayBuffer(value, encodingOrOffset, length);
+      }
+      if (typeof value === "number") {
+        throw new TypeError('The "value" argument must not be of type number. Received type number');
+      }
+      const valueOf = value.valueOf && value.valueOf();
+      if (valueOf != null && valueOf !== value) {
+        return Buffer3.from(valueOf, encodingOrOffset, length);
+      }
+      const b = fromObject(value);
+      if (b) return b;
+      if (typeof Symbol !== "undefined" && Symbol.toPrimitive != null && typeof value[Symbol.toPrimitive] === "function") {
+        return Buffer3.from(value[Symbol.toPrimitive]("string"), encodingOrOffset, length);
+      }
+      throw new TypeError("The first argument must be one of type string, Buffer, ArrayBuffer, Array, or Array-like Object. Received type " + typeof value);
+    }
+    Buffer3.from = function(value, encodingOrOffset, length) {
+      return from(value, encodingOrOffset, length);
+    };
+    Object.setPrototypeOf(Buffer3.prototype, Uint8Array.prototype);
+    Object.setPrototypeOf(Buffer3, Uint8Array);
+    function assertSize(size) {
+      if (typeof size !== "number") {
+        throw new TypeError('"size" argument must be of type number');
+      } else if (size < 0) {
+        throw new RangeError('The value "' + size + '" is invalid for option "size"');
+      }
+    }
+    function alloc(size, fill, encoding) {
+      assertSize(size);
+      if (size <= 0) {
+        return createBuffer(size);
+      }
+      if (fill !== void 0) {
+        return typeof encoding === "string" ? createBuffer(size).fill(fill, encoding) : createBuffer(size).fill(fill);
+      }
+      return createBuffer(size);
+    }
+    Buffer3.alloc = function(size, fill, encoding) {
+      return alloc(size, fill, encoding);
+    };
+    function allocUnsafe(size) {
+      assertSize(size);
+      return createBuffer(size < 0 ? 0 : checked(size) | 0);
+    }
+    Buffer3.allocUnsafe = function(size) {
+      return allocUnsafe(size);
+    };
+    Buffer3.allocUnsafeSlow = function(size) {
+      return allocUnsafe(size);
+    };
+    function fromString(string, encoding) {
+      if (typeof encoding !== "string" || encoding === "") {
+        encoding = "utf8";
+      }
+      if (!Buffer3.isEncoding(encoding)) {
+        throw new TypeError("Unknown encoding: " + encoding);
+      }
+      const length = byteLength(string, encoding) | 0;
+      let buf = createBuffer(length);
+      const actual = buf.write(string, encoding);
+      if (actual !== length) {
+        buf = buf.slice(0, actual);
+      }
+      return buf;
+    }
+    function fromArrayLike(array) {
+      const length = array.length < 0 ? 0 : checked(array.length) | 0;
+      const buf = createBuffer(length);
+      for (let i = 0; i < length; i += 1) {
+        buf[i] = array[i] & 255;
+      }
+      return buf;
+    }
+    function fromArrayView(arrayView) {
+      if (isInstance(arrayView, Uint8Array)) {
+        const copy = new Uint8Array(arrayView);
+        return fromArrayBuffer(copy.buffer, copy.byteOffset, copy.byteLength);
+      }
+      return fromArrayLike(arrayView);
+    }
+    function fromArrayBuffer(array, byteOffset, length) {
+      if (byteOffset < 0 || array.byteLength < byteOffset) {
+        throw new RangeError('"offset" is outside of buffer bounds');
+      }
+      if (array.byteLength < byteOffset + (length || 0)) {
+        throw new RangeError('"length" is outside of buffer bounds');
+      }
+      let buf;
+      if (byteOffset === void 0 && length === void 0) {
+        buf = new Uint8Array(array);
+      } else if (length === void 0) {
+        buf = new Uint8Array(array, byteOffset);
+      } else {
+        buf = new Uint8Array(array, byteOffset, length);
+      }
+      Object.setPrototypeOf(buf, Buffer3.prototype);
+      return buf;
+    }
+    function fromObject(obj) {
+      if (Buffer3.isBuffer(obj)) {
+        const len = checked(obj.length) | 0;
+        const buf = createBuffer(len);
+        if (buf.length === 0) {
+          return buf;
+        }
+        obj.copy(buf, 0, 0, len);
+        return buf;
+      }
+      if (obj.length !== void 0) {
+        if (typeof obj.length !== "number" || numberIsNaN(obj.length)) {
+          return createBuffer(0);
+        }
+        return fromArrayLike(obj);
+      }
+      if (obj.type === "Buffer" && Array.isArray(obj.data)) {
+        return fromArrayLike(obj.data);
+      }
+    }
+    function checked(length) {
+      if (length >= K_MAX_LENGTH) {
+        throw new RangeError("Attempt to allocate Buffer larger than maximum size: 0x" + K_MAX_LENGTH.toString(16) + " bytes");
+      }
+      return length | 0;
+    }
+    function SlowBuffer(length) {
+      if (+length != length) {
+        length = 0;
+      }
+      return Buffer3.alloc(+length);
+    }
+    Buffer3.isBuffer = function isBuffer(b) {
+      return b != null && b._isBuffer === true && b !== Buffer3.prototype;
+    };
+    Buffer3.compare = function compare(a, b) {
+      if (isInstance(a, Uint8Array)) a = Buffer3.from(a, a.offset, a.byteLength);
+      if (isInstance(b, Uint8Array)) b = Buffer3.from(b, b.offset, b.byteLength);
+      if (!Buffer3.isBuffer(a) || !Buffer3.isBuffer(b)) {
+        throw new TypeError('The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array');
+      }
+      if (a === b) return 0;
+      let x = a.length;
+      let y = b.length;
+      for (let i = 0, len = Math.min(x, y); i < len; ++i) {
+        if (a[i] !== b[i]) {
+          x = a[i];
+          y = b[i];
+          break;
+        }
+      }
+      if (x < y) return -1;
+      if (y < x) return 1;
+      return 0;
+    };
+    Buffer3.isEncoding = function isEncoding(encoding) {
+      switch (String(encoding).toLowerCase()) {
+        case "hex":
+        case "utf8":
+        case "utf-8":
+        case "ascii":
+        case "latin1":
+        case "binary":
+        case "base64":
+        case "ucs2":
+        case "ucs-2":
+        case "utf16le":
+        case "utf-16le":
+          return true;
+        default:
+          return false;
+      }
+    };
+    Buffer3.concat = function concat(list, length) {
+      if (!Array.isArray(list)) {
+        throw new TypeError('"list" argument must be an Array of Buffers');
+      }
+      if (list.length === 0) {
+        return Buffer3.alloc(0);
+      }
+      let i;
+      if (length === void 0) {
+        length = 0;
+        for (i = 0; i < list.length; ++i) {
+          length += list[i].length;
+        }
+      }
+      const buffer = Buffer3.allocUnsafe(length);
+      let pos = 0;
+      for (i = 0; i < list.length; ++i) {
+        let buf = list[i];
+        if (isInstance(buf, Uint8Array)) {
+          if (pos + buf.length > buffer.length) {
+            if (!Buffer3.isBuffer(buf)) buf = Buffer3.from(buf);
+            buf.copy(buffer, pos);
+          } else {
+            Uint8Array.prototype.set.call(buffer, buf, pos);
+          }
+        } else if (!Buffer3.isBuffer(buf)) {
+          throw new TypeError('"list" argument must be an Array of Buffers');
+        } else {
+          buf.copy(buffer, pos);
+        }
+        pos += buf.length;
+      }
+      return buffer;
+    };
+    function byteLength(string, encoding) {
+      if (Buffer3.isBuffer(string)) {
+        return string.length;
+      }
+      if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
+        return string.byteLength;
+      }
+      if (typeof string !== "string") {
+        throw new TypeError('The "string" argument must be one of type string, Buffer, or ArrayBuffer. Received type ' + typeof string);
+      }
+      const len = string.length;
+      const mustMatch = arguments.length > 2 && arguments[2] === true;
+      if (!mustMatch && len === 0) return 0;
+      let loweredCase = false;
+      for (; ; ) {
+        switch (encoding) {
+          case "ascii":
+          case "latin1":
+          case "binary":
+            return len;
+          case "utf8":
+          case "utf-8":
+            return utf8ToBytes(string).length;
+          case "ucs2":
+          case "ucs-2":
+          case "utf16le":
+          case "utf-16le":
+            return len * 2;
+          case "hex":
+            return len >>> 1;
+          case "base64":
+            return base64ToBytes(string).length;
+          default:
+            if (loweredCase) {
+              return mustMatch ? -1 : utf8ToBytes(string).length;
+            }
+            encoding = ("" + encoding).toLowerCase();
+            loweredCase = true;
+        }
+      }
+    }
+    Buffer3.byteLength = byteLength;
+    function slowToString(encoding, start, end) {
+      let loweredCase = false;
+      if (start === void 0 || start < 0) {
+        start = 0;
+      }
+      if (start > this.length) {
+        return "";
+      }
+      if (end === void 0 || end > this.length) {
+        end = this.length;
+      }
+      if (end <= 0) {
+        return "";
+      }
+      end >>>= 0;
+      start >>>= 0;
+      if (end <= start) {
+        return "";
+      }
+      if (!encoding) encoding = "utf8";
+      while (true) {
+        switch (encoding) {
+          case "hex":
+            return hexSlice(this, start, end);
+          case "utf8":
+          case "utf-8":
+            return utf8Slice(this, start, end);
+          case "ascii":
+            return asciiSlice(this, start, end);
+          case "latin1":
+          case "binary":
+            return latin1Slice(this, start, end);
+          case "base64":
+            return base64Slice(this, start, end);
+          case "ucs2":
+          case "ucs-2":
+          case "utf16le":
+          case "utf-16le":
+            return utf16leSlice(this, start, end);
+          default:
+            if (loweredCase) throw new TypeError("Unknown encoding: " + encoding);
+            encoding = (encoding + "").toLowerCase();
+            loweredCase = true;
+        }
+      }
+    }
+    Buffer3.prototype._isBuffer = true;
+    function swap(b, n, m) {
+      const i = b[n];
+      b[n] = b[m];
+      b[m] = i;
+    }
+    Buffer3.prototype.swap16 = function swap16() {
+      const len = this.length;
+      if (len % 2 !== 0) {
+        throw new RangeError("Buffer size must be a multiple of 16-bits");
+      }
+      for (let i = 0; i < len; i += 2) {
+        swap(this, i, i + 1);
+      }
+      return this;
+    };
+    Buffer3.prototype.swap32 = function swap32() {
+      const len = this.length;
+      if (len % 4 !== 0) {
+        throw new RangeError("Buffer size must be a multiple of 32-bits");
+      }
+      for (let i = 0; i < len; i += 4) {
+        swap(this, i, i + 3);
+        swap(this, i + 1, i + 2);
+      }
+      return this;
+    };
+    Buffer3.prototype.swap64 = function swap64() {
+      const len = this.length;
+      if (len % 8 !== 0) {
+        throw new RangeError("Buffer size must be a multiple of 64-bits");
+      }
+      for (let i = 0; i < len; i += 8) {
+        swap(this, i, i + 7);
+        swap(this, i + 1, i + 6);
+        swap(this, i + 2, i + 5);
+        swap(this, i + 3, i + 4);
+      }
+      return this;
+    };
+    Buffer3.prototype.toString = function toString() {
+      const length = this.length;
+      if (length === 0) return "";
+      if (arguments.length === 0) return utf8Slice(this, 0, length);
+      return slowToString.apply(this, arguments);
+    };
+    Buffer3.prototype.toLocaleString = Buffer3.prototype.toString;
+    Buffer3.prototype.equals = function equals(b) {
+      if (!Buffer3.isBuffer(b)) throw new TypeError("Argument must be a Buffer");
+      if (this === b) return true;
+      return Buffer3.compare(this, b) === 0;
+    };
+    Buffer3.prototype.inspect = function inspect() {
+      let str = "";
+      const max = exports.INSPECT_MAX_BYTES;
+      str = this.toString("hex", 0, max).replace(/(.{2})/g, "$1 ").trim();
+      if (this.length > max) str += " ... ";
+      return "<Buffer " + str + ">";
+    };
+    if (customInspectSymbol) {
+      Buffer3.prototype[customInspectSymbol] = Buffer3.prototype.inspect;
+    }
+    Buffer3.prototype.compare = function compare(target, start, end, thisStart, thisEnd) {
+      if (isInstance(target, Uint8Array)) {
+        target = Buffer3.from(target, target.offset, target.byteLength);
+      }
+      if (!Buffer3.isBuffer(target)) {
+        throw new TypeError('The "target" argument must be one of type Buffer or Uint8Array. Received type ' + typeof target);
+      }
+      if (start === void 0) {
+        start = 0;
+      }
+      if (end === void 0) {
+        end = target ? target.length : 0;
+      }
+      if (thisStart === void 0) {
+        thisStart = 0;
+      }
+      if (thisEnd === void 0) {
+        thisEnd = this.length;
+      }
+      if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
+        throw new RangeError("out of range index");
+      }
+      if (thisStart >= thisEnd && start >= end) {
+        return 0;
+      }
+      if (thisStart >= thisEnd) {
+        return -1;
+      }
+      if (start >= end) {
+        return 1;
+      }
+      start >>>= 0;
+      end >>>= 0;
+      thisStart >>>= 0;
+      thisEnd >>>= 0;
+      if (this === target) return 0;
+      let x = thisEnd - thisStart;
+      let y = end - start;
+      const len = Math.min(x, y);
+      const thisCopy = this.slice(thisStart, thisEnd);
+      const targetCopy = target.slice(start, end);
+      for (let i = 0; i < len; ++i) {
+        if (thisCopy[i] !== targetCopy[i]) {
+          x = thisCopy[i];
+          y = targetCopy[i];
+          break;
+        }
+      }
+      if (x < y) return -1;
+      if (y < x) return 1;
+      return 0;
+    };
+    function bidirectionalIndexOf(buffer, val, byteOffset, encoding, dir) {
+      if (buffer.length === 0) return -1;
+      if (typeof byteOffset === "string") {
+        encoding = byteOffset;
+        byteOffset = 0;
+      } else if (byteOffset > 2147483647) {
+        byteOffset = 2147483647;
+      } else if (byteOffset < -2147483648) {
+        byteOffset = -2147483648;
+      }
+      byteOffset = +byteOffset;
+      if (numberIsNaN(byteOffset)) {
+        byteOffset = dir ? 0 : buffer.length - 1;
+      }
+      if (byteOffset < 0) byteOffset = buffer.length + byteOffset;
+      if (byteOffset >= buffer.length) {
+        if (dir) return -1;
+        else byteOffset = buffer.length - 1;
+      } else if (byteOffset < 0) {
+        if (dir) byteOffset = 0;
+        else return -1;
+      }
+      if (typeof val === "string") {
+        val = Buffer3.from(val, encoding);
+      }
+      if (Buffer3.isBuffer(val)) {
+        if (val.length === 0) {
+          return -1;
+        }
+        return arrayIndexOf(buffer, val, byteOffset, encoding, dir);
+      } else if (typeof val === "number") {
+        val = val & 255;
+        if (typeof Uint8Array.prototype.indexOf === "function") {
+          if (dir) {
+            return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset);
+          } else {
+            return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset);
+          }
+        }
+        return arrayIndexOf(buffer, [val], byteOffset, encoding, dir);
+      }
+      throw new TypeError("val must be string, number or Buffer");
+    }
+    function arrayIndexOf(arr, val, byteOffset, encoding, dir) {
+      let indexSize = 1;
+      let arrLength = arr.length;
+      let valLength = val.length;
+      if (encoding !== void 0) {
+        encoding = String(encoding).toLowerCase();
+        if (encoding === "ucs2" || encoding === "ucs-2" || encoding === "utf16le" || encoding === "utf-16le") {
+          if (arr.length < 2 || val.length < 2) {
+            return -1;
+          }
+          indexSize = 2;
+          arrLength /= 2;
+          valLength /= 2;
+          byteOffset /= 2;
+        }
+      }
+      function read(buf, i2) {
+        if (indexSize === 1) {
+          return buf[i2];
+        } else {
+          return buf.readUInt16BE(i2 * indexSize);
+        }
+      }
+      let i;
+      if (dir) {
+        let foundIndex = -1;
+        for (i = byteOffset; i < arrLength; i++) {
+          if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
+            if (foundIndex === -1) foundIndex = i;
+            if (i - foundIndex + 1 === valLength) return foundIndex * indexSize;
+          } else {
+            if (foundIndex !== -1) i -= i - foundIndex;
+            foundIndex = -1;
+          }
+        }
+      } else {
+        if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength;
+        for (i = byteOffset; i >= 0; i--) {
+          let found = true;
+          for (let j = 0; j < valLength; j++) {
+            if (read(arr, i + j) !== read(val, j)) {
+              found = false;
+              break;
+            }
+          }
+          if (found) return i;
+        }
+      }
+      return -1;
+    }
+    Buffer3.prototype.includes = function includes(val, byteOffset, encoding) {
+      return this.indexOf(val, byteOffset, encoding) !== -1;
+    };
+    Buffer3.prototype.indexOf = function indexOf(val, byteOffset, encoding) {
+      return bidirectionalIndexOf(this, val, byteOffset, encoding, true);
+    };
+    Buffer3.prototype.lastIndexOf = function lastIndexOf(val, byteOffset, encoding) {
+      return bidirectionalIndexOf(this, val, byteOffset, encoding, false);
+    };
+    function hexWrite(buf, string, offset, length) {
+      offset = Number(offset) || 0;
+      const remaining = buf.length - offset;
+      if (!length) {
+        length = remaining;
+      } else {
+        length = Number(length);
+        if (length > remaining) {
+          length = remaining;
+        }
+      }
+      const strLen = string.length;
+      if (length > strLen / 2) {
+        length = strLen / 2;
+      }
+      let i;
+      for (i = 0; i < length; ++i) {
+        const parsed = parseInt(string.substr(i * 2, 2), 16);
+        if (numberIsNaN(parsed)) return i;
+        buf[offset + i] = parsed;
+      }
+      return i;
+    }
+    function utf8Write(buf, string, offset, length) {
+      return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length);
+    }
+    function asciiWrite(buf, string, offset, length) {
+      return blitBuffer(asciiToBytes(string), buf, offset, length);
+    }
+    function base64Write(buf, string, offset, length) {
+      return blitBuffer(base64ToBytes(string), buf, offset, length);
+    }
+    function ucs2Write(buf, string, offset, length) {
+      return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length);
+    }
+    Buffer3.prototype.write = function write(string, offset, length, encoding) {
+      if (offset === void 0) {
+        encoding = "utf8";
+        length = this.length;
+        offset = 0;
+      } else if (length === void 0 && typeof offset === "string") {
+        encoding = offset;
+        length = this.length;
+        offset = 0;
+      } else if (isFinite(offset)) {
+        offset = offset >>> 0;
+        if (isFinite(length)) {
+          length = length >>> 0;
+          if (encoding === void 0) encoding = "utf8";
+        } else {
+          encoding = length;
+          length = void 0;
+        }
+      } else {
+        throw new Error("Buffer.write(string, encoding, offset[, length]) is no longer supported");
+      }
+      const remaining = this.length - offset;
+      if (length === void 0 || length > remaining) length = remaining;
+      if (string.length > 0 && (length < 0 || offset < 0) || offset > this.length) {
+        throw new RangeError("Attempt to write outside buffer bounds");
+      }
+      if (!encoding) encoding = "utf8";
+      let loweredCase = false;
+      for (; ; ) {
+        switch (encoding) {
+          case "hex":
+            return hexWrite(this, string, offset, length);
+          case "utf8":
+          case "utf-8":
+            return utf8Write(this, string, offset, length);
+          case "ascii":
+          case "latin1":
+          case "binary":
+            return asciiWrite(this, string, offset, length);
+          case "base64":
+            return base64Write(this, string, offset, length);
+          case "ucs2":
+          case "ucs-2":
+          case "utf16le":
+          case "utf-16le":
+            return ucs2Write(this, string, offset, length);
+          default:
+            if (loweredCase) throw new TypeError("Unknown encoding: " + encoding);
+            encoding = ("" + encoding).toLowerCase();
+            loweredCase = true;
+        }
+      }
+    };
+    Buffer3.prototype.toJSON = function toJSON() {
+      return {
+        type: "Buffer",
+        data: Array.prototype.slice.call(this._arr || this, 0)
+      };
+    };
+    function base64Slice(buf, start, end) {
+      if (start === 0 && end === buf.length) {
+        return base64.fromByteArray(buf);
+      } else {
+        return base64.fromByteArray(buf.slice(start, end));
+      }
+    }
+    function utf8Slice(buf, start, end) {
+      end = Math.min(buf.length, end);
+      const res = [];
+      let i = start;
+      while (i < end) {
+        const firstByte = buf[i];
+        let codePoint = null;
+        let bytesPerSequence = firstByte > 239 ? 4 : firstByte > 223 ? 3 : firstByte > 191 ? 2 : 1;
+        if (i + bytesPerSequence <= end) {
+          let secondByte, thirdByte, fourthByte, tempCodePoint;
+          switch (bytesPerSequence) {
+            case 1:
+              if (firstByte < 128) {
+                codePoint = firstByte;
+              }
+              break;
+            case 2:
+              secondByte = buf[i + 1];
+              if ((secondByte & 192) === 128) {
+                tempCodePoint = (firstByte & 31) << 6 | secondByte & 63;
+                if (tempCodePoint > 127) {
+                  codePoint = tempCodePoint;
+                }
+              }
+              break;
+            case 3:
+              secondByte = buf[i + 1];
+              thirdByte = buf[i + 2];
+              if ((secondByte & 192) === 128 && (thirdByte & 192) === 128) {
+                tempCodePoint = (firstByte & 15) << 12 | (secondByte & 63) << 6 | thirdByte & 63;
+                if (tempCodePoint > 2047 && (tempCodePoint < 55296 || tempCodePoint > 57343)) {
+                  codePoint = tempCodePoint;
+                }
+              }
+              break;
+            case 4:
+              secondByte = buf[i + 1];
+              thirdByte = buf[i + 2];
+              fourthByte = buf[i + 3];
+              if ((secondByte & 192) === 128 && (thirdByte & 192) === 128 && (fourthByte & 192) === 128) {
+                tempCodePoint = (firstByte & 15) << 18 | (secondByte & 63) << 12 | (thirdByte & 63) << 6 | fourthByte & 63;
+                if (tempCodePoint > 65535 && tempCodePoint < 1114112) {
+                  codePoint = tempCodePoint;
+                }
+              }
+          }
+        }
+        if (codePoint === null) {
+          codePoint = 65533;
+          bytesPerSequence = 1;
+        } else if (codePoint > 65535) {
+          codePoint -= 65536;
+          res.push(codePoint >>> 10 & 1023 | 55296);
+          codePoint = 56320 | codePoint & 1023;
+        }
+        res.push(codePoint);
+        i += bytesPerSequence;
+      }
+      return decodeCodePointsArray(res);
+    }
+    const MAX_ARGUMENTS_LENGTH = 4096;
+    function decodeCodePointsArray(codePoints) {
+      const len = codePoints.length;
+      if (len <= MAX_ARGUMENTS_LENGTH) {
+        return String.fromCharCode.apply(String, codePoints);
+      }
+      let res = "";
+      let i = 0;
+      while (i < len) {
+        res += String.fromCharCode.apply(String, codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH));
+      }
+      return res;
+    }
+    function asciiSlice(buf, start, end) {
+      let ret = "";
+      end = Math.min(buf.length, end);
+      for (let i = start; i < end; ++i) {
+        ret += String.fromCharCode(buf[i] & 127);
+      }
+      return ret;
+    }
+    function latin1Slice(buf, start, end) {
+      let ret = "";
+      end = Math.min(buf.length, end);
+      for (let i = start; i < end; ++i) {
+        ret += String.fromCharCode(buf[i]);
+      }
+      return ret;
+    }
+    function hexSlice(buf, start, end) {
+      const len = buf.length;
+      if (!start || start < 0) start = 0;
+      if (!end || end < 0 || end > len) end = len;
+      let out = "";
+      for (let i = start; i < end; ++i) {
+        out += hexSliceLookupTable[buf[i]];
+      }
+      return out;
+    }
+    function utf16leSlice(buf, start, end) {
+      const bytes = buf.slice(start, end);
+      let res = "";
+      for (let i = 0; i < bytes.length - 1; i += 2) {
+        res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256);
+      }
+      return res;
+    }
+    Buffer3.prototype.slice = function slice(start, end) {
+      const len = this.length;
+      start = ~~start;
+      end = end === void 0 ? len : ~~end;
+      if (start < 0) {
+        start += len;
+        if (start < 0) start = 0;
+      } else if (start > len) {
+        start = len;
+      }
+      if (end < 0) {
+        end += len;
+        if (end < 0) end = 0;
+      } else if (end > len) {
+        end = len;
+      }
+      if (end < start) end = start;
+      const newBuf = this.subarray(start, end);
+      Object.setPrototypeOf(newBuf, Buffer3.prototype);
+      return newBuf;
+    };
+    function checkOffset(offset, ext, length) {
+      if (offset % 1 !== 0 || offset < 0) throw new RangeError("offset is not uint");
+      if (offset + ext > length) throw new RangeError("Trying to access beyond buffer length");
+    }
+    Buffer3.prototype.readUintLE = Buffer3.prototype.readUIntLE = function readUIntLE(offset, byteLength2, noAssert) {
+      offset = offset >>> 0;
+      byteLength2 = byteLength2 >>> 0;
+      if (!noAssert) checkOffset(offset, byteLength2, this.length);
+      let val = this[offset];
+      let mul = 1;
+      let i = 0;
+      while (++i < byteLength2 && (mul *= 256)) {
+        val += this[offset + i] * mul;
+      }
+      return val;
+    };
+    Buffer3.prototype.readUintBE = Buffer3.prototype.readUIntBE = function readUIntBE(offset, byteLength2, noAssert) {
+      offset = offset >>> 0;
+      byteLength2 = byteLength2 >>> 0;
+      if (!noAssert) {
+        checkOffset(offset, byteLength2, this.length);
+      }
+      let val = this[offset + --byteLength2];
+      let mul = 1;
+      while (byteLength2 > 0 && (mul *= 256)) {
+        val += this[offset + --byteLength2] * mul;
+      }
+      return val;
+    };
+    Buffer3.prototype.readUint8 = Buffer3.prototype.readUInt8 = function readUInt8(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 1, this.length);
+      return this[offset];
+    };
+    Buffer3.prototype.readUint16LE = Buffer3.prototype.readUInt16LE = function readUInt16LE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 2, this.length);
+      return this[offset] | this[offset + 1] << 8;
+    };
+    Buffer3.prototype.readUint16BE = Buffer3.prototype.readUInt16BE = function readUInt16BE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 2, this.length);
+      return this[offset] << 8 | this[offset + 1];
+    };
+    Buffer3.prototype.readUint32LE = Buffer3.prototype.readUInt32LE = function readUInt32LE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 4, this.length);
+      return (this[offset] | this[offset + 1] << 8 | this[offset + 2] << 16) + this[offset + 3] * 16777216;
+    };
+    Buffer3.prototype.readUint32BE = Buffer3.prototype.readUInt32BE = function readUInt32BE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 4, this.length);
+      return this[offset] * 16777216 + (this[offset + 1] << 16 | this[offset + 2] << 8 | this[offset + 3]);
+    };
+    Buffer3.prototype.readBigUInt64LE = defineBigIntMethod(function readBigUInt64LE(offset) {
+      offset = offset >>> 0;
+      validateNumber(offset, "offset");
+      const first = this[offset];
+      const last = this[offset + 7];
+      if (first === void 0 || last === void 0) {
+        boundsError(offset, this.length - 8);
+      }
+      const lo = first + this[++offset] * 2 ** 8 + this[++offset] * 2 ** 16 + this[++offset] * 2 ** 24;
+      const hi = this[++offset] + this[++offset] * 2 ** 8 + this[++offset] * 2 ** 16 + last * 2 ** 24;
+      return BigInt(lo) + (BigInt(hi) << BigInt(32));
+    });
+    Buffer3.prototype.readBigUInt64BE = defineBigIntMethod(function readBigUInt64BE(offset) {
+      offset = offset >>> 0;
+      validateNumber(offset, "offset");
+      const first = this[offset];
+      const last = this[offset + 7];
+      if (first === void 0 || last === void 0) {
+        boundsError(offset, this.length - 8);
+      }
+      const hi = first * 2 ** 24 + this[++offset] * 2 ** 16 + this[++offset] * 2 ** 8 + this[++offset];
+      const lo = this[++offset] * 2 ** 24 + this[++offset] * 2 ** 16 + this[++offset] * 2 ** 8 + last;
+      return (BigInt(hi) << BigInt(32)) + BigInt(lo);
+    });
+    Buffer3.prototype.readIntLE = function readIntLE(offset, byteLength2, noAssert) {
+      offset = offset >>> 0;
+      byteLength2 = byteLength2 >>> 0;
+      if (!noAssert) checkOffset(offset, byteLength2, this.length);
+      let val = this[offset];
+      let mul = 1;
+      let i = 0;
+      while (++i < byteLength2 && (mul *= 256)) {
+        val += this[offset + i] * mul;
+      }
+      mul *= 128;
+      if (val >= mul) val -= Math.pow(2, 8 * byteLength2);
+      return val;
+    };
+    Buffer3.prototype.readIntBE = function readIntBE(offset, byteLength2, noAssert) {
+      offset = offset >>> 0;
+      byteLength2 = byteLength2 >>> 0;
+      if (!noAssert) checkOffset(offset, byteLength2, this.length);
+      let i = byteLength2;
+      let mul = 1;
+      let val = this[offset + --i];
+      while (i > 0 && (mul *= 256)) {
+        val += this[offset + --i] * mul;
+      }
+      mul *= 128;
+      if (val >= mul) val -= Math.pow(2, 8 * byteLength2);
+      return val;
+    };
+    Buffer3.prototype.readInt8 = function readInt8(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 1, this.length);
+      if (!(this[offset] & 128)) return this[offset];
+      return (255 - this[offset] + 1) * -1;
+    };
+    Buffer3.prototype.readInt16LE = function readInt16LE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 2, this.length);
+      const val = this[offset] | this[offset + 1] << 8;
+      return val & 32768 ? val | 4294901760 : val;
+    };
+    Buffer3.prototype.readInt16BE = function readInt16BE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 2, this.length);
+      const val = this[offset + 1] | this[offset] << 8;
+      return val & 32768 ? val | 4294901760 : val;
+    };
+    Buffer3.prototype.readInt32LE = function readInt32LE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 4, this.length);
+      return this[offset] | this[offset + 1] << 8 | this[offset + 2] << 16 | this[offset + 3] << 24;
+    };
+    Buffer3.prototype.readInt32BE = function readInt32BE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 4, this.length);
+      return this[offset] << 24 | this[offset + 1] << 16 | this[offset + 2] << 8 | this[offset + 3];
+    };
+    Buffer3.prototype.readBigInt64LE = defineBigIntMethod(function readBigInt64LE(offset) {
+      offset = offset >>> 0;
+      validateNumber(offset, "offset");
+      const first = this[offset];
+      const last = this[offset + 7];
+      if (first === void 0 || last === void 0) {
+        boundsError(offset, this.length - 8);
+      }
+      const val = this[offset + 4] + this[offset + 5] * 2 ** 8 + this[offset + 6] * 2 ** 16 + (last << 24);
+      return (BigInt(val) << BigInt(32)) + BigInt(first + this[++offset] * 2 ** 8 + this[++offset] * 2 ** 16 + this[++offset] * 2 ** 24);
+    });
+    Buffer3.prototype.readBigInt64BE = defineBigIntMethod(function readBigInt64BE(offset) {
+      offset = offset >>> 0;
+      validateNumber(offset, "offset");
+      const first = this[offset];
+      const last = this[offset + 7];
+      if (first === void 0 || last === void 0) {
+        boundsError(offset, this.length - 8);
+      }
+      const val = (first << 24) + // Overflow
+      this[++offset] * 2 ** 16 + this[++offset] * 2 ** 8 + this[++offset];
+      return (BigInt(val) << BigInt(32)) + BigInt(this[++offset] * 2 ** 24 + this[++offset] * 2 ** 16 + this[++offset] * 2 ** 8 + last);
+    });
+    Buffer3.prototype.readFloatLE = function readFloatLE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 4, this.length);
+      return ieee754.read(this, offset, true, 23, 4);
+    };
+    Buffer3.prototype.readFloatBE = function readFloatBE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 4, this.length);
+      return ieee754.read(this, offset, false, 23, 4);
+    };
+    Buffer3.prototype.readDoubleLE = function readDoubleLE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 8, this.length);
+      return ieee754.read(this, offset, true, 52, 8);
+    };
+    Buffer3.prototype.readDoubleBE = function readDoubleBE(offset, noAssert) {
+      offset = offset >>> 0;
+      if (!noAssert) checkOffset(offset, 8, this.length);
+      return ieee754.read(this, offset, false, 52, 8);
+    };
+    function checkInt(buf, value, offset, ext, max, min) {
+      if (!Buffer3.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance');
+      if (value > max || value < min) throw new RangeError('"value" argument is out of bounds');
+      if (offset + ext > buf.length) throw new RangeError("Index out of range");
+    }
+    Buffer3.prototype.writeUintLE = Buffer3.prototype.writeUIntLE = function writeUIntLE(value, offset, byteLength2, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      byteLength2 = byteLength2 >>> 0;
+      if (!noAssert) {
+        const maxBytes = Math.pow(2, 8 * byteLength2) - 1;
+        checkInt(this, value, offset, byteLength2, maxBytes, 0);
+      }
+      let mul = 1;
+      let i = 0;
+      this[offset] = value & 255;
+      while (++i < byteLength2 && (mul *= 256)) {
+        this[offset + i] = value / mul & 255;
+      }
+      return offset + byteLength2;
+    };
+    Buffer3.prototype.writeUintBE = Buffer3.prototype.writeUIntBE = function writeUIntBE(value, offset, byteLength2, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      byteLength2 = byteLength2 >>> 0;
+      if (!noAssert) {
+        const maxBytes = Math.pow(2, 8 * byteLength2) - 1;
+        checkInt(this, value, offset, byteLength2, maxBytes, 0);
+      }
+      let i = byteLength2 - 1;
+      let mul = 1;
+      this[offset + i] = value & 255;
+      while (--i >= 0 && (mul *= 256)) {
+        this[offset + i] = value / mul & 255;
+      }
+      return offset + byteLength2;
+    };
+    Buffer3.prototype.writeUint8 = Buffer3.prototype.writeUInt8 = function writeUInt8(value, offset, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) checkInt(this, value, offset, 1, 255, 0);
+      this[offset] = value & 255;
+      return offset + 1;
+    };
+    Buffer3.prototype.writeUint16LE = Buffer3.prototype.writeUInt16LE = function writeUInt16LE(value, offset, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) checkInt(this, value, offset, 2, 65535, 0);
+      this[offset] = value & 255;
+      this[offset + 1] = value >>> 8;
+      return offset + 2;
+    };
+    Buffer3.prototype.writeUint16BE = Buffer3.prototype.writeUInt16BE = function writeUInt16BE(value, offset, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) checkInt(this, value, offset, 2, 65535, 0);
+      this[offset] = value >>> 8;
+      this[offset + 1] = value & 255;
+      return offset + 2;
+    };
+    Buffer3.prototype.writeUint32LE = Buffer3.prototype.writeUInt32LE = function writeUInt32LE(value, offset, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) checkInt(this, value, offset, 4, 4294967295, 0);
+      this[offset + 3] = value >>> 24;
+      this[offset + 2] = value >>> 16;
+      this[offset + 1] = value >>> 8;
+      this[offset] = value & 255;
+      return offset + 4;
+    };
+    Buffer3.prototype.writeUint32BE = Buffer3.prototype.writeUInt32BE = function writeUInt32BE(value, offset, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) checkInt(this, value, offset, 4, 4294967295, 0);
+      this[offset] = value >>> 24;
+      this[offset + 1] = value >>> 16;
+      this[offset + 2] = value >>> 8;
+      this[offset + 3] = value & 255;
+      return offset + 4;
+    };
+    function wrtBigUInt64LE(buf, value, offset, min, max) {
+      checkIntBI(value, min, max, buf, offset, 7);
+      let lo = Number(value & BigInt(4294967295));
+      buf[offset++] = lo;
+      lo = lo >> 8;
+      buf[offset++] = lo;
+      lo = lo >> 8;
+      buf[offset++] = lo;
+      lo = lo >> 8;
+      buf[offset++] = lo;
+      let hi = Number(value >> BigInt(32) & BigInt(4294967295));
+      buf[offset++] = hi;
+      hi = hi >> 8;
+      buf[offset++] = hi;
+      hi = hi >> 8;
+      buf[offset++] = hi;
+      hi = hi >> 8;
+      buf[offset++] = hi;
+      return offset;
+    }
+    function wrtBigUInt64BE(buf, value, offset, min, max) {
+      checkIntBI(value, min, max, buf, offset, 7);
+      let lo = Number(value & BigInt(4294967295));
+      buf[offset + 7] = lo;
+      lo = lo >> 8;
+      buf[offset + 6] = lo;
+      lo = lo >> 8;
+      buf[offset + 5] = lo;
+      lo = lo >> 8;
+      buf[offset + 4] = lo;
+      let hi = Number(value >> BigInt(32) & BigInt(4294967295));
+      buf[offset + 3] = hi;
+      hi = hi >> 8;
+      buf[offset + 2] = hi;
+      hi = hi >> 8;
+      buf[offset + 1] = hi;
+      hi = hi >> 8;
+      buf[offset] = hi;
+      return offset + 8;
+    }
+    Buffer3.prototype.writeBigUInt64LE = defineBigIntMethod(function writeBigUInt64LE(value, offset = 0) {
+      return wrtBigUInt64LE(this, value, offset, BigInt(0), BigInt("0xffffffffffffffff"));
+    });
+    Buffer3.prototype.writeBigUInt64BE = defineBigIntMethod(function writeBigUInt64BE(value, offset = 0) {
+      return wrtBigUInt64BE(this, value, offset, BigInt(0), BigInt("0xffffffffffffffff"));
+    });
+    Buffer3.prototype.writeIntLE = function writeIntLE(value, offset, byteLength2, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) {
+        const limit = Math.pow(2, 8 * byteLength2 - 1);
+        checkInt(this, value, offset, byteLength2, limit - 1, -limit);
+      }
+      let i = 0;
+      let mul = 1;
+      let sub = 0;
+      this[offset] = value & 255;
+      while (++i < byteLength2 && (mul *= 256)) {
+        if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
+          sub = 1;
+        }
+        this[offset + i] = (value / mul >> 0) - sub & 255;
+      }
+      return offset + byteLength2;
+    };
+    Buffer3.prototype.writeIntBE = function writeIntBE(value, offset, byteLength2, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) {
+        const limit = Math.pow(2, 8 * byteLength2 - 1);
+        checkInt(this, value, offset, byteLength2, limit - 1, -limit);
+      }
+      let i = byteLength2 - 1;
+      let mul = 1;
+      let sub = 0;
+      this[offset + i] = value & 255;
+      while (--i >= 0 && (mul *= 256)) {
+        if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
+          sub = 1;
+        }
+        this[offset + i] = (value / mul >> 0) - sub & 255;
+      }
+      return offset + byteLength2;
+    };
+    Buffer3.prototype.writeInt8 = function writeInt8(value, offset, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) checkInt(this, value, offset, 1, 127, -128);
+      if (value < 0) value = 255 + value + 1;
+      this[offset] = value & 255;
+      return offset + 1;
+    };
+    Buffer3.prototype.writeInt16LE = function writeInt16LE(value, offset, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) checkInt(this, value, offset, 2, 32767, -32768);
+      this[offset] = value & 255;
+      this[offset + 1] = value >>> 8;
+      return offset + 2;
+    };
+    Buffer3.prototype.writeInt16BE = function writeInt16BE(value, offset, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) checkInt(this, value, offset, 2, 32767, -32768);
+      this[offset] = value >>> 8;
+      this[offset + 1] = value & 255;
+      return offset + 2;
+    };
+    Buffer3.prototype.writeInt32LE = function writeInt32LE(value, offset, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) checkInt(this, value, offset, 4, 2147483647, -2147483648);
+      this[offset] = value & 255;
+      this[offset + 1] = value >>> 8;
+      this[offset + 2] = value >>> 16;
+      this[offset + 3] = value >>> 24;
+      return offset + 4;
+    };
+    Buffer3.prototype.writeInt32BE = function writeInt32BE(value, offset, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) checkInt(this, value, offset, 4, 2147483647, -2147483648);
+      if (value < 0) value = 4294967295 + value + 1;
+      this[offset] = value >>> 24;
+      this[offset + 1] = value >>> 16;
+      this[offset + 2] = value >>> 8;
+      this[offset + 3] = value & 255;
+      return offset + 4;
+    };
+    Buffer3.prototype.writeBigInt64LE = defineBigIntMethod(function writeBigInt64LE(value, offset = 0) {
+      return wrtBigUInt64LE(this, value, offset, -BigInt("0x8000000000000000"), BigInt("0x7fffffffffffffff"));
+    });
+    Buffer3.prototype.writeBigInt64BE = defineBigIntMethod(function writeBigInt64BE(value, offset = 0) {
+      return wrtBigUInt64BE(this, value, offset, -BigInt("0x8000000000000000"), BigInt("0x7fffffffffffffff"));
+    });
+    function checkIEEE754(buf, value, offset, ext, max, min) {
+      if (offset + ext > buf.length) throw new RangeError("Index out of range");
+      if (offset < 0) throw new RangeError("Index out of range");
+    }
+    function writeFloat(buf, value, offset, littleEndian, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) {
+        checkIEEE754(buf, value, offset, 4);
+      }
+      ieee754.write(buf, value, offset, littleEndian, 23, 4);
+      return offset + 4;
+    }
+    Buffer3.prototype.writeFloatLE = function writeFloatLE(value, offset, noAssert) {
+      return writeFloat(this, value, offset, true, noAssert);
+    };
+    Buffer3.prototype.writeFloatBE = function writeFloatBE(value, offset, noAssert) {
+      return writeFloat(this, value, offset, false, noAssert);
+    };
+    function writeDouble(buf, value, offset, littleEndian, noAssert) {
+      value = +value;
+      offset = offset >>> 0;
+      if (!noAssert) {
+        checkIEEE754(buf, value, offset, 8);
+      }
+      ieee754.write(buf, value, offset, littleEndian, 52, 8);
+      return offset + 8;
+    }
+    Buffer3.prototype.writeDoubleLE = function writeDoubleLE(value, offset, noAssert) {
+      return writeDouble(this, value, offset, true, noAssert);
+    };
+    Buffer3.prototype.writeDoubleBE = function writeDoubleBE(value, offset, noAssert) {
+      return writeDouble(this, value, offset, false, noAssert);
+    };
+    Buffer3.prototype.copy = function copy(target, targetStart, start, end) {
+      if (!Buffer3.isBuffer(target)) throw new TypeError("argument should be a Buffer");
+      if (!start) start = 0;
+      if (!end && end !== 0) end = this.length;
+      if (targetStart >= target.length) targetStart = target.length;
+      if (!targetStart) targetStart = 0;
+      if (end > 0 && end < start) end = start;
+      if (end === start) return 0;
+      if (target.length === 0 || this.length === 0) return 0;
+      if (targetStart < 0) {
+        throw new RangeError("targetStart out of bounds");
+      }
+      if (start < 0 || start >= this.length) throw new RangeError("Index out of range");
+      if (end < 0) throw new RangeError("sourceEnd out of bounds");
+      if (end > this.length) end = this.length;
+      if (target.length - targetStart < end - start) {
+        end = target.length - targetStart + start;
+      }
+      const len = end - start;
+      if (this === target && typeof Uint8Array.prototype.copyWithin === "function") {
+        this.copyWithin(targetStart, start, end);
+      } else {
+        Uint8Array.prototype.set.call(target, this.subarray(start, end), targetStart);
+      }
+      return len;
+    };
+    Buffer3.prototype.fill = function fill(val, start, end, encoding) {
+      if (typeof val === "string") {
+        if (typeof start === "string") {
+          encoding = start;
+          start = 0;
+          end = this.length;
+        } else if (typeof end === "string") {
+          encoding = end;
+          end = this.length;
+        }
+        if (encoding !== void 0 && typeof encoding !== "string") {
+          throw new TypeError("encoding must be a string");
+        }
+        if (typeof encoding === "string" && !Buffer3.isEncoding(encoding)) {
+          throw new TypeError("Unknown encoding: " + encoding);
+        }
+        if (val.length === 1) {
+          const code = val.charCodeAt(0);
+          if (encoding === "utf8" && code < 128 || encoding === "latin1") {
+            val = code;
+          }
+        }
+      } else if (typeof val === "number") {
+        val = val & 255;
+      } else if (typeof val === "boolean") {
+        val = Number(val);
+      }
+      if (start < 0 || this.length < start || this.length < end) {
+        throw new RangeError("Out of range index");
+      }
+      if (end <= start) {
+        return this;
+      }
+      start = start >>> 0;
+      end = end === void 0 ? this.length : end >>> 0;
+      if (!val) val = 0;
+      let i;
+      if (typeof val === "number") {
+        for (i = start; i < end; ++i) {
+          this[i] = val;
+        }
+      } else {
+        const bytes = Buffer3.isBuffer(val) ? val : Buffer3.from(val, encoding);
+        const len = bytes.length;
+        if (len === 0) {
+          throw new TypeError('The value "' + val + '" is invalid for argument "value"');
+        }
+        for (i = 0; i < end - start; ++i) {
+          this[i + start] = bytes[i % len];
+        }
+      }
+      return this;
+    };
+    const errors = {};
+    function E(sym, getMessage, Base) {
+      errors[sym] = class NodeError extends Base {
+        constructor() {
+          super();
+          Object.defineProperty(this, "message", {
+            value: getMessage.apply(this, arguments),
+            writable: true,
+            configurable: true
+          });
+          this.name = `${this.name} [${sym}]`;
+          this.stack;
+          delete this.name;
+        }
+        get code() {
+          return sym;
+        }
+        set code(value) {
+          Object.defineProperty(this, "code", {
+            configurable: true,
+            enumerable: true,
+            value,
+            writable: true
+          });
+        }
+        toString() {
+          return `${this.name} [${sym}]: ${this.message}`;
+        }
+      };
+    }
+    E("ERR_BUFFER_OUT_OF_BOUNDS", function(name2) {
+      if (name2) {
+        return `${name2} is outside of buffer bounds`;
+      }
+      return "Attempt to access memory outside buffer bounds";
+    }, RangeError);
+    E("ERR_INVALID_ARG_TYPE", function(name2, actual) {
+      return `The "${name2}" argument must be of type number. Received type ${typeof actual}`;
+    }, TypeError);
+    E("ERR_OUT_OF_RANGE", function(str, range, input) {
+      let msg = `The value of "${str}" is out of range.`;
+      let received = input;
+      if (Number.isInteger(input) && Math.abs(input) > 2 ** 32) {
+        received = addNumericalSeparator(String(input));
+      } else if (typeof input === "bigint") {
+        received = String(input);
+        if (input > BigInt(2) ** BigInt(32) || input < -(BigInt(2) ** BigInt(32))) {
+          received = addNumericalSeparator(received);
+        }
+        received += "n";
+      }
+      msg += ` It must be ${range}. Received ${received}`;
+      return msg;
+    }, RangeError);
+    function addNumericalSeparator(val) {
+      let res = "";
+      let i = val.length;
+      const start = val[0] === "-" ? 1 : 0;
+      for (; i >= start + 4; i -= 3) {
+        res = `_${val.slice(i - 3, i)}${res}`;
+      }
+      return `${val.slice(0, i)}${res}`;
+    }
+    function checkBounds(buf, offset, byteLength2) {
+      validateNumber(offset, "offset");
+      if (buf[offset] === void 0 || buf[offset + byteLength2] === void 0) {
+        boundsError(offset, buf.length - (byteLength2 + 1));
+      }
+    }
+    function checkIntBI(value, min, max, buf, offset, byteLength2) {
+      if (value > max || value < min) {
+        const n = typeof min === "bigint" ? "n" : "";
+        let range;
+        {
+          if (min === 0 || min === BigInt(0)) {
+            range = `>= 0${n} and < 2${n} ** ${(byteLength2 + 1) * 8}${n}`;
+          } else {
+            range = `>= -(2${n} ** ${(byteLength2 + 1) * 8 - 1}${n}) and < 2 ** ${(byteLength2 + 1) * 8 - 1}${n}`;
+          }
+        }
+        throw new errors.ERR_OUT_OF_RANGE("value", range, value);
+      }
+      checkBounds(buf, offset, byteLength2);
+    }
+    function validateNumber(value, name2) {
+      if (typeof value !== "number") {
+        throw new errors.ERR_INVALID_ARG_TYPE(name2, "number", value);
+      }
+    }
+    function boundsError(value, length, type) {
+      if (Math.floor(value) !== value) {
+        validateNumber(value, type);
+        throw new errors.ERR_OUT_OF_RANGE("offset", "an integer", value);
+      }
+      if (length < 0) {
+        throw new errors.ERR_BUFFER_OUT_OF_BOUNDS();
+      }
+      throw new errors.ERR_OUT_OF_RANGE("offset", `>= ${0} and <= ${length}`, value);
+    }
+    const INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g;
+    function base64clean(str) {
+      str = str.split("=")[0];
+      str = str.trim().replace(INVALID_BASE64_RE, "");
+      if (str.length < 2) return "";
+      while (str.length % 4 !== 0) {
+        str = str + "=";
+      }
+      return str;
+    }
+    function utf8ToBytes(string, units) {
+      units = units || Infinity;
+      let codePoint;
+      const length = string.length;
+      let leadSurrogate = null;
+      const bytes = [];
+      for (let i = 0; i < length; ++i) {
+        codePoint = string.charCodeAt(i);
+        if (codePoint > 55295 && codePoint < 57344) {
+          if (!leadSurrogate) {
+            if (codePoint > 56319) {
+              if ((units -= 3) > -1) bytes.push(239, 191, 189);
+              continue;
+            } else if (i + 1 === length) {
+              if ((units -= 3) > -1) bytes.push(239, 191, 189);
+              continue;
+            }
+            leadSurrogate = codePoint;
+            continue;
+          }
+          if (codePoint < 56320) {
+            if ((units -= 3) > -1) bytes.push(239, 191, 189);
+            leadSurrogate = codePoint;
+            continue;
+          }
+          codePoint = (leadSurrogate - 55296 << 10 | codePoint - 56320) + 65536;
+        } else if (leadSurrogate) {
+          if ((units -= 3) > -1) bytes.push(239, 191, 189);
+        }
+        leadSurrogate = null;
+        if (codePoint < 128) {
+          if ((units -= 1) < 0) break;
+          bytes.push(codePoint);
+        } else if (codePoint < 2048) {
+          if ((units -= 2) < 0) break;
+          bytes.push(codePoint >> 6 | 192, codePoint & 63 | 128);
+        } else if (codePoint < 65536) {
+          if ((units -= 3) < 0) break;
+          bytes.push(codePoint >> 12 | 224, codePoint >> 6 & 63 | 128, codePoint & 63 | 128);
+        } else if (codePoint < 1114112) {
+          if ((units -= 4) < 0) break;
+          bytes.push(codePoint >> 18 | 240, codePoint >> 12 & 63 | 128, codePoint >> 6 & 63 | 128, codePoint & 63 | 128);
+        } else {
+          throw new Error("Invalid code point");
+        }
+      }
+      return bytes;
+    }
+    function asciiToBytes(str) {
+      const byteArray = [];
+      for (let i = 0; i < str.length; ++i) {
+        byteArray.push(str.charCodeAt(i) & 255);
+      }
+      return byteArray;
+    }
+    function utf16leToBytes(str, units) {
+      let c, hi, lo;
+      const byteArray = [];
+      for (let i = 0; i < str.length; ++i) {
+        if ((units -= 2) < 0) break;
+        c = str.charCodeAt(i);
+        hi = c >> 8;
+        lo = c % 256;
+        byteArray.push(lo);
+        byteArray.push(hi);
+      }
+      return byteArray;
+    }
+    function base64ToBytes(str) {
+      return base64.toByteArray(base64clean(str));
+    }
+    function blitBuffer(src, dst, offset, length) {
+      let i;
+      for (i = 0; i < length; ++i) {
+        if (i + offset >= dst.length || i >= src.length) break;
+        dst[i + offset] = src[i];
+      }
+      return i;
+    }
+    function isInstance(obj, type) {
+      return obj instanceof type || obj != null && obj.constructor != null && obj.constructor.name != null && obj.constructor.name === type.name;
+    }
+    function numberIsNaN(obj) {
+      return obj !== obj;
+    }
+    const hexSliceLookupTable = (function() {
+      const alphabet = "0123456789abcdef";
+      const table = new Array(256);
+      for (let i = 0; i < 16; ++i) {
+        const i16 = i * 16;
+        for (let j = 0; j < 16; ++j) {
+          table[i16 + j] = alphabet[i] + alphabet[j];
+        }
+      }
+      return table;
+    })();
+    function defineBigIntMethod(fn) {
+      return typeof BigInt === "undefined" ? BufferBigIntNotDefined : fn;
+    }
+    function BufferBigIntNotDefined() {
+      throw new Error("BigInt not supported");
+    }
+    return exports;
+  }
+  var exports$2, _dewExec$2, exports$1, _dewExec$1, exports, _dewExec;
+  var init_chunk_DtuTasat = __esm({
+    "node_modules/@jspm/core/nodelibs/browser/chunk-DtuTasat.js"() {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      exports$2 = {};
+      _dewExec$2 = false;
+      exports$1 = {};
+      _dewExec$1 = false;
+      exports = {};
+      _dewExec = false;
+    }
+  });
+
+  // node_modules/@jspm/core/nodelibs/browser/buffer.js
+  var buffer_exports = {};
+  __export(buffer_exports, {
+    Buffer: () => Buffer2,
+    INSPECT_MAX_BYTES: () => INSPECT_MAX_BYTES,
+    default: () => exports2,
+    kMaxLength: () => kMaxLength
+  });
+  var exports2, Buffer2, INSPECT_MAX_BYTES, kMaxLength;
+  var init_buffer = __esm({
+    "node_modules/@jspm/core/nodelibs/browser/buffer.js"() {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      init_chunk_DtuTasat();
+      exports2 = dew();
+      exports2["Buffer"];
+      exports2["SlowBuffer"];
+      exports2["INSPECT_MAX_BYTES"];
+      exports2["kMaxLength"];
+      Buffer2 = exports2.Buffer;
+      INSPECT_MAX_BYTES = exports2.INSPECT_MAX_BYTES;
+      kMaxLength = exports2.kMaxLength;
+    }
+  });
+
+  // node_modules/esbuild-plugin-polyfill-node/polyfills/buffer.js
+  var init_buffer2 = __esm({
+    "node_modules/esbuild-plugin-polyfill-node/polyfills/buffer.js"() {
+      init_buffer();
+    }
+  });
+
+  // node_modules/readable-stream/lib/ours/primordials.js
+  var require_primordials = __commonJS({
+    "node_modules/readable-stream/lib/ours/primordials.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var AggregateError2 = class extends Error {
+        constructor(errors) {
+          if (!Array.isArray(errors)) {
+            throw new TypeError(`Expected input to be an Array, got ${typeof errors}`);
+          }
+          let message = "";
+          for (let i = 0; i < errors.length; i++) {
+            message += `    ${errors[i].stack}
+`;
+          }
+          super(message);
+          this.name = "AggregateError";
+          this.errors = errors;
+        }
+      };
+      module.exports = {
+        AggregateError: AggregateError2,
+        ArrayIsArray(self2) {
+          return Array.isArray(self2);
+        },
+        ArrayPrototypeIncludes(self2, el) {
+          return self2.includes(el);
+        },
+        ArrayPrototypeIndexOf(self2, el) {
+          return self2.indexOf(el);
+        },
+        ArrayPrototypeJoin(self2, sep) {
+          return self2.join(sep);
+        },
+        ArrayPrototypeMap(self2, fn) {
+          return self2.map(fn);
+        },
+        ArrayPrototypePop(self2, el) {
+          return self2.pop(el);
+        },
+        ArrayPrototypePush(self2, el) {
+          return self2.push(el);
+        },
+        ArrayPrototypeSlice(self2, start, end) {
+          return self2.slice(start, end);
+        },
+        Error,
+        FunctionPrototypeCall(fn, thisArgs, ...args) {
+          return fn.call(thisArgs, ...args);
+        },
+        FunctionPrototypeSymbolHasInstance(self2, instance) {
+          return Function.prototype[Symbol.hasInstance].call(self2, instance);
+        },
+        MathFloor: Math.floor,
+        Number,
+        NumberIsInteger: Number.isInteger,
+        NumberIsNaN: Number.isNaN,
+        NumberMAX_SAFE_INTEGER: Number.MAX_SAFE_INTEGER,
+        NumberMIN_SAFE_INTEGER: Number.MIN_SAFE_INTEGER,
+        NumberParseInt: Number.parseInt,
+        ObjectDefineProperties(self2, props) {
+          return Object.defineProperties(self2, props);
+        },
+        ObjectDefineProperty(self2, name2, prop) {
+          return Object.defineProperty(self2, name2, prop);
+        },
+        ObjectGetOwnPropertyDescriptor(self2, name2) {
+          return Object.getOwnPropertyDescriptor(self2, name2);
+        },
+        ObjectKeys(obj) {
+          return Object.keys(obj);
+        },
+        ObjectSetPrototypeOf(target, proto) {
+          return Object.setPrototypeOf(target, proto);
+        },
+        Promise,
+        PromisePrototypeCatch(self2, fn) {
+          return self2.catch(fn);
+        },
+        PromisePrototypeThen(self2, thenFn, catchFn) {
+          return self2.then(thenFn, catchFn);
+        },
+        PromiseReject(err) {
+          return Promise.reject(err);
+        },
+        PromiseResolve(val) {
+          return Promise.resolve(val);
+        },
+        ReflectApply: Reflect.apply,
+        RegExpPrototypeTest(self2, value) {
+          return self2.test(value);
+        },
+        SafeSet: Set,
+        String,
+        StringPrototypeSlice(self2, start, end) {
+          return self2.slice(start, end);
+        },
+        StringPrototypeToLowerCase(self2) {
+          return self2.toLowerCase();
+        },
+        StringPrototypeToUpperCase(self2) {
+          return self2.toUpperCase();
+        },
+        StringPrototypeTrim(self2) {
+          return self2.trim();
+        },
+        Symbol,
+        SymbolFor: Symbol.for,
+        SymbolAsyncIterator: Symbol.asyncIterator,
+        SymbolHasInstance: Symbol.hasInstance,
+        SymbolIterator: Symbol.iterator,
+        SymbolDispose: Symbol.dispose || Symbol("Symbol.dispose"),
+        SymbolAsyncDispose: Symbol.asyncDispose || Symbol("Symbol.asyncDispose"),
+        TypedArrayPrototypeSet(self2, buf, len) {
+          return self2.set(buf, len);
+        },
+        Boolean,
+        Uint8Array
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/ours/util/inspect.js
+  var require_inspect = __commonJS({
+    "node_modules/readable-stream/lib/ours/util/inspect.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      module.exports = {
+        format(format2, ...args) {
+          return format2.replace(/%([sdifj])/g, function(...[_unused, type]) {
+            const replacement = args.shift();
+            if (type === "f") {
+              return replacement.toFixed(6);
+            } else if (type === "j") {
+              return JSON.stringify(replacement);
+            } else if (type === "s" && typeof replacement === "object") {
+              const ctor = replacement.constructor !== Object ? replacement.constructor.name : "";
+              return `${ctor} {}`.trim();
+            } else {
+              return replacement.toString();
+            }
+          });
+        },
+        inspect(value) {
+          switch (typeof value) {
+            case "string":
+              if (value.includes("'")) {
+                if (!value.includes('"')) {
+                  return `"${value}"`;
+                } else if (!value.includes("`") && !value.includes("${")) {
+                  return `\`${value}\``;
+                }
+              }
+              return `'${value}'`;
+            case "number":
+              if (isNaN(value)) {
+                return "NaN";
+              } else if (Object.is(value, -0)) {
+                return String(value);
+              }
+              return value;
+            case "bigint":
+              return `${String(value)}n`;
+            case "boolean":
+            case "undefined":
+              return String(value);
+            case "object":
+              return "{}";
+          }
+        }
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/ours/errors.js
+  var require_errors = __commonJS({
+    "node_modules/readable-stream/lib/ours/errors.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { format: format2, inspect } = require_inspect();
+      var { AggregateError: CustomAggregateError } = require_primordials();
+      var AggregateError2 = globalThis.AggregateError || CustomAggregateError;
+      var kIsNodeError = Symbol("kIsNodeError");
+      var kTypes = [
+        "string",
+        "function",
+        "number",
+        "object",
+        // Accept 'Function' and 'Object' as alternative to the lower cased version.
+        "Function",
+        "Object",
+        "boolean",
+        "bigint",
+        "symbol"
+      ];
+      var classRegExp = /^([A-Z][a-z0-9]*)+$/;
+      var nodeInternalPrefix = "__node_internal_";
+      var codes = {};
+      function assert3(value, message) {
+        if (!value) {
+          throw new codes.ERR_INTERNAL_ASSERTION(message);
+        }
+      }
+      function addNumericalSeparator(val) {
+        let res = "";
+        let i = val.length;
+        const start = val[0] === "-" ? 1 : 0;
+        for (; i >= start + 4; i -= 3) {
+          res = `_${val.slice(i - 3, i)}${res}`;
+        }
+        return `${val.slice(0, i)}${res}`;
+      }
+      function getMessage(key, msg, args) {
+        if (typeof msg === "function") {
+          assert3(
+            msg.length <= args.length,
+            // Default options do not count.
+            `Code: ${key}; The provided arguments length (${args.length}) does not match the required ones (${msg.length}).`
+          );
+          return msg(...args);
+        }
+        const expectedLength = (msg.match(/%[dfijoOs]/g) || []).length;
+        assert3(
+          expectedLength === args.length,
+          `Code: ${key}; The provided arguments length (${args.length}) does not match the required ones (${expectedLength}).`
+        );
+        if (args.length === 0) {
+          return msg;
+        }
+        return format2(msg, ...args);
+      }
+      function E(code, message, Base) {
+        if (!Base) {
+          Base = Error;
+        }
+        class NodeError extends Base {
+          constructor(...args) {
+            super(getMessage(code, message, args));
+          }
+          toString() {
+            return `${this.name} [${code}]: ${this.message}`;
+          }
+        }
+        Object.defineProperties(NodeError.prototype, {
+          name: {
+            value: Base.name,
+            writable: true,
+            enumerable: false,
+            configurable: true
+          },
+          toString: {
+            value() {
+              return `${this.name} [${code}]: ${this.message}`;
+            },
+            writable: true,
+            enumerable: false,
+            configurable: true
+          }
+        });
+        NodeError.prototype.code = code;
+        NodeError.prototype[kIsNodeError] = true;
+        codes[code] = NodeError;
+      }
+      function hideStackFrames(fn) {
+        const hidden = nodeInternalPrefix + fn.name;
+        Object.defineProperty(fn, "name", {
+          value: hidden
+        });
+        return fn;
+      }
+      function aggregateTwoErrors(innerError, outerError) {
+        if (innerError && outerError && innerError !== outerError) {
+          if (Array.isArray(outerError.errors)) {
+            outerError.errors.push(innerError);
+            return outerError;
+          }
+          const err = new AggregateError2([outerError, innerError], outerError.message);
+          err.code = outerError.code;
+          return err;
+        }
+        return innerError || outerError;
+      }
+      var AbortError = class extends Error {
+        constructor(message = "The operation was aborted", options = void 0) {
+          if (options !== void 0 && typeof options !== "object") {
+            throw new codes.ERR_INVALID_ARG_TYPE("options", "Object", options);
+          }
+          super(message, options);
+          this.code = "ABORT_ERR";
+          this.name = "AbortError";
+        }
+      };
+      E("ERR_ASSERTION", "%s", Error);
+      E(
+        "ERR_INVALID_ARG_TYPE",
+        (name2, expected, actual) => {
+          assert3(typeof name2 === "string", "'name' must be a string");
+          if (!Array.isArray(expected)) {
+            expected = [expected];
+          }
+          let msg = "The ";
+          if (name2.endsWith(" argument")) {
+            msg += `${name2} `;
+          } else {
+            msg += `"${name2}" ${name2.includes(".") ? "property" : "argument"} `;
+          }
+          msg += "must be ";
+          const types = [];
+          const instances = [];
+          const other = [];
+          for (const value of expected) {
+            assert3(typeof value === "string", "All expected entries have to be of type string");
+            if (kTypes.includes(value)) {
+              types.push(value.toLowerCase());
+            } else if (classRegExp.test(value)) {
+              instances.push(value);
+            } else {
+              assert3(value !== "object", 'The value "object" should be written as "Object"');
+              other.push(value);
+            }
+          }
+          if (instances.length > 0) {
+            const pos = types.indexOf("object");
+            if (pos !== -1) {
+              types.splice(types, pos, 1);
+              instances.push("Object");
+            }
+          }
+          if (types.length > 0) {
+            switch (types.length) {
+              case 1:
+                msg += `of type ${types[0]}`;
+                break;
+              case 2:
+                msg += `one of type ${types[0]} or ${types[1]}`;
+                break;
+              default: {
+                const last = types.pop();
+                msg += `one of type ${types.join(", ")}, or ${last}`;
+              }
+            }
+            if (instances.length > 0 || other.length > 0) {
+              msg += " or ";
+            }
+          }
+          if (instances.length > 0) {
+            switch (instances.length) {
+              case 1:
+                msg += `an instance of ${instances[0]}`;
+                break;
+              case 2:
+                msg += `an instance of ${instances[0]} or ${instances[1]}`;
+                break;
+              default: {
+                const last = instances.pop();
+                msg += `an instance of ${instances.join(", ")}, or ${last}`;
+              }
+            }
+            if (other.length > 0) {
+              msg += " or ";
+            }
+          }
+          switch (other.length) {
+            case 0:
+              break;
+            case 1:
+              if (other[0].toLowerCase() !== other[0]) {
+                msg += "an ";
+              }
+              msg += `${other[0]}`;
+              break;
+            case 2:
+              msg += `one of ${other[0]} or ${other[1]}`;
+              break;
+            default: {
+              const last = other.pop();
+              msg += `one of ${other.join(", ")}, or ${last}`;
+            }
+          }
+          if (actual == null) {
+            msg += `. Received ${actual}`;
+          } else if (typeof actual === "function" && actual.name) {
+            msg += `. Received function ${actual.name}`;
+          } else if (typeof actual === "object") {
+            var _actual$constructor;
+            if ((_actual$constructor = actual.constructor) !== null && _actual$constructor !== void 0 && _actual$constructor.name) {
+              msg += `. Received an instance of ${actual.constructor.name}`;
+            } else {
+              const inspected = inspect(actual, {
+                depth: -1
+              });
+              msg += `. Received ${inspected}`;
+            }
+          } else {
+            let inspected = inspect(actual, {
+              colors: false
+            });
+            if (inspected.length > 25) {
+              inspected = `${inspected.slice(0, 25)}...`;
+            }
+            msg += `. Received type ${typeof actual} (${inspected})`;
+          }
+          return msg;
+        },
+        TypeError
+      );
+      E(
+        "ERR_INVALID_ARG_VALUE",
+        (name2, value, reason = "is invalid") => {
+          let inspected = inspect(value);
+          if (inspected.length > 128) {
+            inspected = inspected.slice(0, 128) + "...";
+          }
+          const type = name2.includes(".") ? "property" : "argument";
+          return `The ${type} '${name2}' ${reason}. Received ${inspected}`;
+        },
+        TypeError
+      );
+      E(
+        "ERR_INVALID_RETURN_VALUE",
+        (input, name2, value) => {
+          var _value$constructor;
+          const type = value !== null && value !== void 0 && (_value$constructor = value.constructor) !== null && _value$constructor !== void 0 && _value$constructor.name ? `instance of ${value.constructor.name}` : `type ${typeof value}`;
+          return `Expected ${input} to be returned from the "${name2}" function but got ${type}.`;
+        },
+        TypeError
+      );
+      E(
+        "ERR_MISSING_ARGS",
+        (...args) => {
+          assert3(args.length > 0, "At least one arg needs to be specified");
+          let msg;
+          const len = args.length;
+          args = (Array.isArray(args) ? args : [args]).map((a) => `"${a}"`).join(" or ");
+          switch (len) {
+            case 1:
+              msg += `The ${args[0]} argument`;
+              break;
+            case 2:
+              msg += `The ${args[0]} and ${args[1]} arguments`;
+              break;
+            default:
+              {
+                const last = args.pop();
+                msg += `The ${args.join(", ")}, and ${last} arguments`;
+              }
+              break;
+          }
+          return `${msg} must be specified`;
+        },
+        TypeError
+      );
+      E(
+        "ERR_OUT_OF_RANGE",
+        (str, range, input) => {
+          assert3(range, 'Missing "range" argument');
+          let received;
+          if (Number.isInteger(input) && Math.abs(input) > 2 ** 32) {
+            received = addNumericalSeparator(String(input));
+          } else if (typeof input === "bigint") {
+            received = String(input);
+            const limit = BigInt(2) ** BigInt(32);
+            if (input > limit || input < -limit) {
+              received = addNumericalSeparator(received);
+            }
+            received += "n";
+          } else {
+            received = inspect(input);
+          }
+          return `The value of "${str}" is out of range. It must be ${range}. Received ${received}`;
+        },
+        RangeError
+      );
+      E("ERR_MULTIPLE_CALLBACK", "Callback called multiple times", Error);
+      E("ERR_METHOD_NOT_IMPLEMENTED", "The %s method is not implemented", Error);
+      E("ERR_STREAM_ALREADY_FINISHED", "Cannot call %s after a stream was finished", Error);
+      E("ERR_STREAM_CANNOT_PIPE", "Cannot pipe, not readable", Error);
+      E("ERR_STREAM_DESTROYED", "Cannot call %s after a stream was destroyed", Error);
+      E("ERR_STREAM_NULL_VALUES", "May not write null values to stream", TypeError);
+      E("ERR_STREAM_PREMATURE_CLOSE", "Premature close", Error);
+      E("ERR_STREAM_PUSH_AFTER_EOF", "stream.push() after EOF", Error);
+      E("ERR_STREAM_UNSHIFT_AFTER_END_EVENT", "stream.unshift() after end event", Error);
+      E("ERR_STREAM_WRITE_AFTER_END", "write after end", Error);
+      E("ERR_UNKNOWN_ENCODING", "Unknown encoding: %s", TypeError);
+      module.exports = {
+        AbortError,
+        aggregateTwoErrors: hideStackFrames(aggregateTwoErrors),
+        hideStackFrames,
+        codes
+      };
+    }
+  });
+
+  // node_modules/abort-controller/browser.js
+  var require_browser = __commonJS({
+    "node_modules/abort-controller/browser.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { AbortController, AbortSignal } = typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : (
+        /* otherwise */
+        void 0
+      );
+      module.exports = AbortController;
+      module.exports.AbortSignal = AbortSignal;
+      module.exports.default = AbortController;
+    }
+  });
+
+  // node_modules/@jspm/core/nodelibs/browser/events.js
+  var events_exports = {};
+  __export(events_exports, {
+    EventEmitter: () => EventEmitter,
+    default: () => exports3,
+    defaultMaxListeners: () => defaultMaxListeners,
+    init: () => init,
+    listenerCount: () => listenerCount,
+    on: () => on2,
+    once: () => once2
+  });
+  function dew2() {
+    if (_dewExec2) return exports$12;
+    _dewExec2 = true;
+    var R = typeof Reflect === "object" ? Reflect : null;
+    var ReflectApply = R && typeof R.apply === "function" ? R.apply : function ReflectApply2(target, receiver, args) {
+      return Function.prototype.apply.call(target, receiver, args);
+    };
+    var ReflectOwnKeys;
+    if (R && typeof R.ownKeys === "function") {
+      ReflectOwnKeys = R.ownKeys;
+    } else if (Object.getOwnPropertySymbols) {
+      ReflectOwnKeys = function ReflectOwnKeys2(target) {
+        return Object.getOwnPropertyNames(target).concat(Object.getOwnPropertySymbols(target));
+      };
+    } else {
+      ReflectOwnKeys = function ReflectOwnKeys2(target) {
+        return Object.getOwnPropertyNames(target);
+      };
+    }
+    function ProcessEmitWarning(warning) {
+      if (console && console.warn) console.warn(warning);
+    }
+    var NumberIsNaN = Number.isNaN || function NumberIsNaN2(value) {
+      return value !== value;
+    };
+    function EventEmitter2() {
+      EventEmitter2.init.call(this);
+    }
+    exports$12 = EventEmitter2;
+    exports$12.once = once4;
+    EventEmitter2.EventEmitter = EventEmitter2;
+    EventEmitter2.prototype._events = void 0;
+    EventEmitter2.prototype._eventsCount = 0;
+    EventEmitter2.prototype._maxListeners = void 0;
+    var defaultMaxListeners2 = 10;
+    function checkListener(listener) {
+      if (typeof listener !== "function") {
+        throw new TypeError('The "listener" argument must be of type Function. Received type ' + typeof listener);
+      }
+    }
+    Object.defineProperty(EventEmitter2, "defaultMaxListeners", {
+      enumerable: true,
+      get: function() {
+        return defaultMaxListeners2;
+      },
+      set: function(arg) {
+        if (typeof arg !== "number" || arg < 0 || NumberIsNaN(arg)) {
+          throw new RangeError('The value of "defaultMaxListeners" is out of range. It must be a non-negative number. Received ' + arg + ".");
+        }
+        defaultMaxListeners2 = arg;
+      }
+    });
+    EventEmitter2.init = function() {
+      if (this._events === void 0 || this._events === Object.getPrototypeOf(this)._events) {
+        this._events = /* @__PURE__ */ Object.create(null);
+        this._eventsCount = 0;
+      }
+      this._maxListeners = this._maxListeners || void 0;
+    };
+    EventEmitter2.prototype.setMaxListeners = function setMaxListeners(n) {
+      if (typeof n !== "number" || n < 0 || NumberIsNaN(n)) {
+        throw new RangeError('The value of "n" is out of range. It must be a non-negative number. Received ' + n + ".");
+      }
+      this._maxListeners = n;
+      return this;
+    };
+    function _getMaxListeners(that) {
+      if (that._maxListeners === void 0) return EventEmitter2.defaultMaxListeners;
+      return that._maxListeners;
+    }
+    EventEmitter2.prototype.getMaxListeners = function getMaxListeners() {
+      return _getMaxListeners(this);
+    };
+    EventEmitter2.prototype.emit = function emit3(type) {
+      var args = [];
+      for (var i = 1; i < arguments.length; i++) args.push(arguments[i]);
+      var doError = type === "error";
+      var events = this._events;
+      if (events !== void 0) doError = doError && events.error === void 0;
+      else if (!doError) return false;
+      if (doError) {
+        var er;
+        if (args.length > 0) er = args[0];
+        if (er instanceof Error) {
+          throw er;
+        }
+        var err = new Error("Unhandled error." + (er ? " (" + er.message + ")" : ""));
+        err.context = er;
+        throw err;
+      }
+      var handler = events[type];
+      if (handler === void 0) return false;
+      if (typeof handler === "function") {
+        ReflectApply(handler, this, args);
+      } else {
+        var len = handler.length;
+        var listeners3 = arrayClone(handler, len);
+        for (var i = 0; i < len; ++i) ReflectApply(listeners3[i], this, args);
+      }
+      return true;
+    };
+    function _addListener(target, type, listener, prepend) {
+      var m;
+      var events;
+      var existing;
+      checkListener(listener);
+      events = target._events;
+      if (events === void 0) {
+        events = target._events = /* @__PURE__ */ Object.create(null);
+        target._eventsCount = 0;
+      } else {
+        if (events.newListener !== void 0) {
+          target.emit("newListener", type, listener.listener ? listener.listener : listener);
+          events = target._events;
+        }
+        existing = events[type];
+      }
+      if (existing === void 0) {
+        existing = events[type] = listener;
+        ++target._eventsCount;
+      } else {
+        if (typeof existing === "function") {
+          existing = events[type] = prepend ? [listener, existing] : [existing, listener];
+        } else if (prepend) {
+          existing.unshift(listener);
+        } else {
+          existing.push(listener);
+        }
+        m = _getMaxListeners(target);
+        if (m > 0 && existing.length > m && !existing.warned) {
+          existing.warned = true;
+          var w = new Error("Possible EventEmitter memory leak detected. " + existing.length + " " + String(type) + " listeners added. Use emitter.setMaxListeners() to increase limit");
+          w.name = "MaxListenersExceededWarning";
+          w.emitter = target;
+          w.type = type;
+          w.count = existing.length;
+          ProcessEmitWarning(w);
+        }
+      }
+      return target;
+    }
+    EventEmitter2.prototype.addListener = function addListener3(type, listener) {
+      return _addListener(this, type, listener, false);
+    };
+    EventEmitter2.prototype.on = EventEmitter2.prototype.addListener;
+    EventEmitter2.prototype.prependListener = function prependListener3(type, listener) {
+      return _addListener(this, type, listener, true);
+    };
+    function onceWrapper() {
+      if (!this.fired) {
+        this.target.removeListener(this.type, this.wrapFn);
+        this.fired = true;
+        if (arguments.length === 0) return this.listener.call(this.target);
+        return this.listener.apply(this.target, arguments);
+      }
+    }
+    function _onceWrap(target, type, listener) {
+      var state = {
+        fired: false,
+        wrapFn: void 0,
+        target,
+        type,
+        listener
+      };
+      var wrapped = onceWrapper.bind(state);
+      wrapped.listener = listener;
+      state.wrapFn = wrapped;
+      return wrapped;
+    }
+    EventEmitter2.prototype.once = function once5(type, listener) {
+      checkListener(listener);
+      this.on(type, _onceWrap(this, type, listener));
+      return this;
+    };
+    EventEmitter2.prototype.prependOnceListener = function prependOnceListener3(type, listener) {
+      checkListener(listener);
+      this.prependListener(type, _onceWrap(this, type, listener));
+      return this;
+    };
+    EventEmitter2.prototype.removeListener = function removeListener3(type, listener) {
+      var list, events, position, i, originalListener;
+      checkListener(listener);
+      events = this._events;
+      if (events === void 0) return this;
+      list = events[type];
+      if (list === void 0) return this;
+      if (list === listener || list.listener === listener) {
+        if (--this._eventsCount === 0) this._events = /* @__PURE__ */ Object.create(null);
+        else {
+          delete events[type];
+          if (events.removeListener) this.emit("removeListener", type, list.listener || listener);
+        }
+      } else if (typeof list !== "function") {
+        position = -1;
+        for (i = list.length - 1; i >= 0; i--) {
+          if (list[i] === listener || list[i].listener === listener) {
+            originalListener = list[i].listener;
+            position = i;
+            break;
+          }
+        }
+        if (position < 0) return this;
+        if (position === 0) list.shift();
+        else {
+          spliceOne(list, position);
+        }
+        if (list.length === 1) events[type] = list[0];
+        if (events.removeListener !== void 0) this.emit("removeListener", type, originalListener || listener);
+      }
+      return this;
+    };
+    EventEmitter2.prototype.off = EventEmitter2.prototype.removeListener;
+    EventEmitter2.prototype.removeAllListeners = function removeAllListeners3(type) {
+      var listeners3, events, i;
+      events = this._events;
+      if (events === void 0) return this;
+      if (events.removeListener === void 0) {
+        if (arguments.length === 0) {
+          this._events = /* @__PURE__ */ Object.create(null);
+          this._eventsCount = 0;
+        } else if (events[type] !== void 0) {
+          if (--this._eventsCount === 0) this._events = /* @__PURE__ */ Object.create(null);
+          else delete events[type];
+        }
+        return this;
+      }
+      if (arguments.length === 0) {
+        var keys = Object.keys(events);
+        var key;
+        for (i = 0; i < keys.length; ++i) {
+          key = keys[i];
+          if (key === "removeListener") continue;
+          this.removeAllListeners(key);
+        }
+        this.removeAllListeners("removeListener");
+        this._events = /* @__PURE__ */ Object.create(null);
+        this._eventsCount = 0;
+        return this;
+      }
+      listeners3 = events[type];
+      if (typeof listeners3 === "function") {
+        this.removeListener(type, listeners3);
+      } else if (listeners3 !== void 0) {
+        for (i = listeners3.length - 1; i >= 0; i--) {
+          this.removeListener(type, listeners3[i]);
+        }
+      }
+      return this;
+    };
+    function _listeners(target, type, unwrap) {
+      var events = target._events;
+      if (events === void 0) return [];
+      var evlistener = events[type];
+      if (evlistener === void 0) return [];
+      if (typeof evlistener === "function") return unwrap ? [evlistener.listener || evlistener] : [evlistener];
+      return unwrap ? unwrapListeners(evlistener) : arrayClone(evlistener, evlistener.length);
+    }
+    EventEmitter2.prototype.listeners = function listeners3(type) {
+      return _listeners(this, type, true);
+    };
+    EventEmitter2.prototype.rawListeners = function rawListeners(type) {
+      return _listeners(this, type, false);
+    };
+    EventEmitter2.listenerCount = function(emitter, type) {
+      if (typeof emitter.listenerCount === "function") {
+        return emitter.listenerCount(type);
+      } else {
+        return listenerCount2.call(emitter, type);
+      }
+    };
+    EventEmitter2.prototype.listenerCount = listenerCount2;
+    function listenerCount2(type) {
+      var events = this._events;
+      if (events !== void 0) {
+        var evlistener = events[type];
+        if (typeof evlistener === "function") {
+          return 1;
+        } else if (evlistener !== void 0) {
+          return evlistener.length;
+        }
+      }
+      return 0;
+    }
+    EventEmitter2.prototype.eventNames = function eventNames() {
+      return this._eventsCount > 0 ? ReflectOwnKeys(this._events) : [];
+    };
+    function arrayClone(arr, n) {
+      var copy = new Array(n);
+      for (var i = 0; i < n; ++i) copy[i] = arr[i];
+      return copy;
+    }
+    function spliceOne(list, index) {
+      for (; index + 1 < list.length; index++) list[index] = list[index + 1];
+      list.pop();
+    }
+    function unwrapListeners(arr) {
+      var ret = new Array(arr.length);
+      for (var i = 0; i < ret.length; ++i) {
+        ret[i] = arr[i].listener || arr[i];
+      }
+      return ret;
+    }
+    function once4(emitter, name2) {
+      return new Promise(function(resolve2, reject) {
+        function errorListener(err) {
+          emitter.removeListener(name2, resolver);
+          reject(err);
+        }
+        function resolver() {
+          if (typeof emitter.removeListener === "function") {
+            emitter.removeListener("error", errorListener);
+          }
+          resolve2([].slice.call(arguments));
+        }
+        eventTargetAgnosticAddListener(emitter, name2, resolver, {
+          once: true
+        });
+        if (name2 !== "error") {
+          addErrorHandlerIfEventEmitter(emitter, errorListener, {
+            once: true
+          });
+        }
+      });
+    }
+    function addErrorHandlerIfEventEmitter(emitter, handler, flags) {
+      if (typeof emitter.on === "function") {
+        eventTargetAgnosticAddListener(emitter, "error", handler, flags);
+      }
+    }
+    function eventTargetAgnosticAddListener(emitter, name2, listener, flags) {
+      if (typeof emitter.on === "function") {
+        if (flags.once) {
+          emitter.once(name2, listener);
+        } else {
+          emitter.on(name2, listener);
+        }
+      } else if (typeof emitter.addEventListener === "function") {
+        emitter.addEventListener(name2, function wrapListener(arg) {
+          if (flags.once) {
+            emitter.removeEventListener(name2, wrapListener);
+          }
+          listener(arg);
+        });
+      } else {
+        throw new TypeError('The "emitter" argument must be of type EventEmitter. Received type ' + typeof emitter);
+      }
+    }
+    return exports$12;
+  }
+  var exports$12, _dewExec2, exports3, EventEmitter, defaultMaxListeners, init, listenerCount, on2, once2;
+  var init_events = __esm({
+    "node_modules/@jspm/core/nodelibs/browser/events.js"() {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      exports$12 = {};
+      _dewExec2 = false;
+      exports3 = dew2();
+      exports3["once"];
+      exports3.once = function(emitter, event) {
+        return new Promise((resolve2, reject) => {
+          function eventListener(...args) {
+            if (errorListener !== void 0) {
+              emitter.removeListener("error", errorListener);
+            }
+            resolve2(args);
+          }
+          let errorListener;
+          if (event !== "error") {
+            errorListener = (err) => {
+              emitter.removeListener(name, eventListener);
+              reject(err);
+            };
+            emitter.once("error", errorListener);
+          }
+          emitter.once(event, eventListener);
+        });
+      };
+      exports3.on = function(emitter, event) {
+        const unconsumedEventValues = [];
+        const unconsumedPromises = [];
+        let error = null;
+        let finished = false;
+        const iterator = {
+          async next() {
+            const value = unconsumedEventValues.shift();
+            if (value) {
+              return createIterResult(value, false);
+            }
+            if (error) {
+              const p = Promise.reject(error);
+              error = null;
+              return p;
+            }
+            if (finished) {
+              return createIterResult(void 0, true);
+            }
+            return new Promise((resolve2, reject) => unconsumedPromises.push({ resolve: resolve2, reject }));
+          },
+          async return() {
+            emitter.removeListener(event, eventHandler);
+            emitter.removeListener("error", errorHandler);
+            finished = true;
+            for (const promise of unconsumedPromises) {
+              promise.resolve(createIterResult(void 0, true));
+            }
+            return createIterResult(void 0, true);
+          },
+          throw(err) {
+            error = err;
+            emitter.removeListener(event, eventHandler);
+            emitter.removeListener("error", errorHandler);
+          },
+          [Symbol.asyncIterator]() {
+            return this;
+          }
+        };
+        emitter.on(event, eventHandler);
+        emitter.on("error", errorHandler);
+        return iterator;
+        function eventHandler(...args) {
+          const promise = unconsumedPromises.shift();
+          if (promise) {
+            promise.resolve(createIterResult(args, false));
+          } else {
+            unconsumedEventValues.push(args);
+          }
+        }
+        function errorHandler(err) {
+          finished = true;
+          const toError = unconsumedPromises.shift();
+          if (toError) {
+            toError.reject(err);
+          } else {
+            error = err;
+          }
+          iterator.return();
+        }
+      };
+      ({
+        EventEmitter,
+        defaultMaxListeners,
+        init,
+        listenerCount,
+        on: on2,
+        once: once2
+      } = exports3);
+    }
+  });
+
+  // node_modules/readable-stream/lib/ours/util.js
+  var require_util = __commonJS({
+    "node_modules/readable-stream/lib/ours/util.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var bufferModule = (init_buffer(), __toCommonJS(buffer_exports));
+      var { format: format2, inspect } = require_inspect();
+      var {
+        codes: { ERR_INVALID_ARG_TYPE }
+      } = require_errors();
+      var { kResistStopPropagation, AggregateError: AggregateError2, SymbolDispose } = require_primordials();
+      var AbortSignal = globalThis.AbortSignal || require_browser().AbortSignal;
+      var AbortController = globalThis.AbortController || require_browser().AbortController;
+      var AsyncFunction = Object.getPrototypeOf(async function() {
+      }).constructor;
+      var Blob2 = globalThis.Blob || bufferModule.Blob;
+      var isBlob = typeof Blob2 !== "undefined" ? function isBlob2(b) {
+        return b instanceof Blob2;
+      } : function isBlob2(b) {
+        return false;
+      };
+      var validateAbortSignal = (signal, name2) => {
+        if (signal !== void 0 && (signal === null || typeof signal !== "object" || !("aborted" in signal))) {
+          throw new ERR_INVALID_ARG_TYPE(name2, "AbortSignal", signal);
+        }
+      };
+      var validateFunction = (value, name2) => {
+        if (typeof value !== "function") {
+          throw new ERR_INVALID_ARG_TYPE(name2, "Function", value);
+        }
+      };
+      module.exports = {
+        AggregateError: AggregateError2,
+        kEmptyObject: Object.freeze({}),
+        once(callback) {
+          let called = false;
+          return function(...args) {
+            if (called) {
+              return;
+            }
+            called = true;
+            callback.apply(this, args);
+          };
+        },
+        createDeferredPromise: function() {
+          let resolve2;
+          let reject;
+          const promise = new Promise((res, rej) => {
+            resolve2 = res;
+            reject = rej;
+          });
+          return {
+            promise,
+            resolve: resolve2,
+            reject
+          };
+        },
+        promisify(fn) {
+          return new Promise((resolve2, reject) => {
+            fn((err, ...args) => {
+              if (err) {
+                return reject(err);
+              }
+              return resolve2(...args);
+            });
+          });
+        },
+        debuglog() {
+          return function() {
+          };
+        },
+        format: format2,
+        inspect,
+        types: {
+          isAsyncFunction(fn) {
+            return fn instanceof AsyncFunction;
+          },
+          isArrayBufferView(arr) {
+            return ArrayBuffer.isView(arr);
+          }
+        },
+        isBlob,
+        deprecate(fn, message) {
+          return fn;
+        },
+        addAbortListener: (init_events(), __toCommonJS(events_exports)).addAbortListener || function addAbortListener(signal, listener) {
+          if (signal === void 0) {
+            throw new ERR_INVALID_ARG_TYPE("signal", "AbortSignal", signal);
+          }
+          validateAbortSignal(signal, "signal");
+          validateFunction(listener, "listener");
+          let removeEventListener;
+          if (signal.aborted) {
+            queueMicrotask(() => listener());
+          } else {
+            signal.addEventListener("abort", listener, {
+              __proto__: null,
+              once: true,
+              [kResistStopPropagation]: true
+            });
+            removeEventListener = () => {
+              signal.removeEventListener("abort", listener);
+            };
+          }
+          return {
+            __proto__: null,
+            [SymbolDispose]() {
+              var _removeEventListener;
+              (_removeEventListener = removeEventListener) === null || _removeEventListener === void 0 ? void 0 : _removeEventListener();
+            }
+          };
+        },
+        AbortSignalAny: AbortSignal.any || function AbortSignalAny(signals) {
+          if (signals.length === 1) {
+            return signals[0];
+          }
+          const ac = new AbortController();
+          const abort3 = () => ac.abort();
+          signals.forEach((signal) => {
+            validateAbortSignal(signal, "signals");
+            signal.addEventListener("abort", abort3, {
+              once: true
+            });
+          });
+          ac.signal.addEventListener(
+            "abort",
+            () => {
+              signals.forEach((signal) => signal.removeEventListener("abort", abort3));
+            },
+            {
+              once: true
+            }
+          );
+          return ac.signal;
+        }
+      };
+      module.exports.promisify.custom = Symbol.for("nodejs.util.promisify.custom");
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/validators.js
+  var require_validators = __commonJS({
+    "node_modules/readable-stream/lib/internal/validators.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var {
+        ArrayIsArray,
+        ArrayPrototypeIncludes,
+        ArrayPrototypeJoin,
+        ArrayPrototypeMap,
+        NumberIsInteger,
+        NumberIsNaN,
+        NumberMAX_SAFE_INTEGER,
+        NumberMIN_SAFE_INTEGER,
+        NumberParseInt,
+        ObjectPrototypeHasOwnProperty,
+        RegExpPrototypeExec,
+        String: String2,
+        StringPrototypeToUpperCase,
+        StringPrototypeTrim
+      } = require_primordials();
+      var {
+        hideStackFrames,
+        codes: { ERR_SOCKET_BAD_PORT, ERR_INVALID_ARG_TYPE, ERR_INVALID_ARG_VALUE, ERR_OUT_OF_RANGE, ERR_UNKNOWN_SIGNAL }
+      } = require_errors();
+      var { normalizeEncoding } = require_util();
+      var { isAsyncFunction, isArrayBufferView } = require_util().types;
+      var signals = {};
+      function isInt32(value) {
+        return value === (value | 0);
+      }
+      function isUint32(value) {
+        return value === value >>> 0;
+      }
+      var octalReg = /^[0-7]+$/;
+      var modeDesc = "must be a 32-bit unsigned integer or an octal string";
+      function parseFileMode(value, name2, def) {
+        if (typeof value === "undefined") {
+          value = def;
+        }
+        if (typeof value === "string") {
+          if (RegExpPrototypeExec(octalReg, value) === null) {
+            throw new ERR_INVALID_ARG_VALUE(name2, value, modeDesc);
+          }
+          value = NumberParseInt(value, 8);
+        }
+        validateUint32(value, name2);
+        return value;
+      }
+      var validateInteger = hideStackFrames((value, name2, min = NumberMIN_SAFE_INTEGER, max = NumberMAX_SAFE_INTEGER) => {
+        if (typeof value !== "number") throw new ERR_INVALID_ARG_TYPE(name2, "number", value);
+        if (!NumberIsInteger(value)) throw new ERR_OUT_OF_RANGE(name2, "an integer", value);
+        if (value < min || value > max) throw new ERR_OUT_OF_RANGE(name2, `>= ${min} && <= ${max}`, value);
+      });
+      var validateInt32 = hideStackFrames((value, name2, min = -2147483648, max = 2147483647) => {
+        if (typeof value !== "number") {
+          throw new ERR_INVALID_ARG_TYPE(name2, "number", value);
+        }
+        if (!NumberIsInteger(value)) {
+          throw new ERR_OUT_OF_RANGE(name2, "an integer", value);
+        }
+        if (value < min || value > max) {
+          throw new ERR_OUT_OF_RANGE(name2, `>= ${min} && <= ${max}`, value);
+        }
+      });
+      var validateUint32 = hideStackFrames((value, name2, positive = false) => {
+        if (typeof value !== "number") {
+          throw new ERR_INVALID_ARG_TYPE(name2, "number", value);
+        }
+        if (!NumberIsInteger(value)) {
+          throw new ERR_OUT_OF_RANGE(name2, "an integer", value);
+        }
+        const min = positive ? 1 : 0;
+        const max = 4294967295;
+        if (value < min || value > max) {
+          throw new ERR_OUT_OF_RANGE(name2, `>= ${min} && <= ${max}`, value);
+        }
+      });
+      function validateString(value, name2) {
+        if (typeof value !== "string") throw new ERR_INVALID_ARG_TYPE(name2, "string", value);
+      }
+      function validateNumber(value, name2, min = void 0, max) {
+        if (typeof value !== "number") throw new ERR_INVALID_ARG_TYPE(name2, "number", value);
+        if (min != null && value < min || max != null && value > max || (min != null || max != null) && NumberIsNaN(value)) {
+          throw new ERR_OUT_OF_RANGE(
+            name2,
+            `${min != null ? `>= ${min}` : ""}${min != null && max != null ? " && " : ""}${max != null ? `<= ${max}` : ""}`,
+            value
+          );
+        }
+      }
+      var validateOneOf = hideStackFrames((value, name2, oneOf) => {
+        if (!ArrayPrototypeIncludes(oneOf, value)) {
+          const allowed = ArrayPrototypeJoin(
+            ArrayPrototypeMap(oneOf, (v) => typeof v === "string" ? `'${v}'` : String2(v)),
+            ", "
+          );
+          const reason = "must be one of: " + allowed;
+          throw new ERR_INVALID_ARG_VALUE(name2, value, reason);
+        }
+      });
+      function validateBoolean(value, name2) {
+        if (typeof value !== "boolean") throw new ERR_INVALID_ARG_TYPE(name2, "boolean", value);
+      }
+      function getOwnPropertyValueOrDefault(options, key, defaultValue) {
+        return options == null || !ObjectPrototypeHasOwnProperty(options, key) ? defaultValue : options[key];
+      }
+      var validateObject = hideStackFrames((value, name2, options = null) => {
+        const allowArray = getOwnPropertyValueOrDefault(options, "allowArray", false);
+        const allowFunction = getOwnPropertyValueOrDefault(options, "allowFunction", false);
+        const nullable = getOwnPropertyValueOrDefault(options, "nullable", false);
+        if (!nullable && value === null || !allowArray && ArrayIsArray(value) || typeof value !== "object" && (!allowFunction || typeof value !== "function")) {
+          throw new ERR_INVALID_ARG_TYPE(name2, "Object", value);
+        }
+      });
+      var validateDictionary = hideStackFrames((value, name2) => {
+        if (value != null && typeof value !== "object" && typeof value !== "function") {
+          throw new ERR_INVALID_ARG_TYPE(name2, "a dictionary", value);
+        }
+      });
+      var validateArray = hideStackFrames((value, name2, minLength = 0) => {
+        if (!ArrayIsArray(value)) {
+          throw new ERR_INVALID_ARG_TYPE(name2, "Array", value);
+        }
+        if (value.length < minLength) {
+          const reason = `must be longer than ${minLength}`;
+          throw new ERR_INVALID_ARG_VALUE(name2, value, reason);
+        }
+      });
+      function validateStringArray(value, name2) {
+        validateArray(value, name2);
+        for (let i = 0; i < value.length; i++) {
+          validateString(value[i], `${name2}[${i}]`);
+        }
+      }
+      function validateBooleanArray(value, name2) {
+        validateArray(value, name2);
+        for (let i = 0; i < value.length; i++) {
+          validateBoolean(value[i], `${name2}[${i}]`);
+        }
+      }
+      function validateAbortSignalArray(value, name2) {
+        validateArray(value, name2);
+        for (let i = 0; i < value.length; i++) {
+          const signal = value[i];
+          const indexedName = `${name2}[${i}]`;
+          if (signal == null) {
+            throw new ERR_INVALID_ARG_TYPE(indexedName, "AbortSignal", signal);
+          }
+          validateAbortSignal(signal, indexedName);
+        }
+      }
+      function validateSignalName(signal, name2 = "signal") {
+        validateString(signal, name2);
+        if (signals[signal] === void 0) {
+          if (signals[StringPrototypeToUpperCase(signal)] !== void 0) {
+            throw new ERR_UNKNOWN_SIGNAL(signal + " (signals must use all capital letters)");
+          }
+          throw new ERR_UNKNOWN_SIGNAL(signal);
+        }
+      }
+      var validateBuffer = hideStackFrames((buffer, name2 = "buffer") => {
+        if (!isArrayBufferView(buffer)) {
+          throw new ERR_INVALID_ARG_TYPE(name2, ["Buffer", "TypedArray", "DataView"], buffer);
+        }
+      });
+      function validateEncoding(data, encoding) {
+        const normalizedEncoding = normalizeEncoding(encoding);
+        const length = data.length;
+        if (normalizedEncoding === "hex" && length % 2 !== 0) {
+          throw new ERR_INVALID_ARG_VALUE("encoding", encoding, `is invalid for data of length ${length}`);
+        }
+      }
+      function validatePort(port, name2 = "Port", allowZero = true) {
+        if (typeof port !== "number" && typeof port !== "string" || typeof port === "string" && StringPrototypeTrim(port).length === 0 || +port !== +port >>> 0 || port > 65535 || port === 0 && !allowZero) {
+          throw new ERR_SOCKET_BAD_PORT(name2, port, allowZero);
+        }
+        return port | 0;
+      }
+      var validateAbortSignal = hideStackFrames((signal, name2) => {
+        if (signal !== void 0 && (signal === null || typeof signal !== "object" || !("aborted" in signal))) {
+          throw new ERR_INVALID_ARG_TYPE(name2, "AbortSignal", signal);
+        }
+      });
+      var validateFunction = hideStackFrames((value, name2) => {
+        if (typeof value !== "function") throw new ERR_INVALID_ARG_TYPE(name2, "Function", value);
+      });
+      var validatePlainFunction = hideStackFrames((value, name2) => {
+        if (typeof value !== "function" || isAsyncFunction(value)) throw new ERR_INVALID_ARG_TYPE(name2, "Function", value);
+      });
+      var validateUndefined = hideStackFrames((value, name2) => {
+        if (value !== void 0) throw new ERR_INVALID_ARG_TYPE(name2, "undefined", value);
+      });
+      function validateUnion(value, name2, union) {
+        if (!ArrayPrototypeIncludes(union, value)) {
+          throw new ERR_INVALID_ARG_TYPE(name2, `('${ArrayPrototypeJoin(union, "|")}')`, value);
+        }
+      }
+      var linkValueRegExp = /^(?:<[^>]*>)(?:\s*;\s*[^;"\s]+(?:=(")?[^;"\s]*\1)?)*$/;
+      function validateLinkHeaderFormat(value, name2) {
+        if (typeof value === "undefined" || !RegExpPrototypeExec(linkValueRegExp, value)) {
+          throw new ERR_INVALID_ARG_VALUE(
+            name2,
+            value,
+            'must be an array or string of format "</styles.css>; rel=preload; as=style"'
+          );
+        }
+      }
+      function validateLinkHeaderValue(hints) {
+        if (typeof hints === "string") {
+          validateLinkHeaderFormat(hints, "hints");
+          return hints;
+        } else if (ArrayIsArray(hints)) {
+          const hintsLength = hints.length;
+          let result = "";
+          if (hintsLength === 0) {
+            return result;
+          }
+          for (let i = 0; i < hintsLength; i++) {
+            const link = hints[i];
+            validateLinkHeaderFormat(link, "hints");
+            result += link;
+            if (i !== hintsLength - 1) {
+              result += ", ";
+            }
+          }
+          return result;
+        }
+        throw new ERR_INVALID_ARG_VALUE(
+          "hints",
+          hints,
+          'must be an array or string of format "</styles.css>; rel=preload; as=style"'
+        );
+      }
+      module.exports = {
+        isInt32,
+        isUint32,
+        parseFileMode,
+        validateArray,
+        validateStringArray,
+        validateBooleanArray,
+        validateAbortSignalArray,
+        validateBoolean,
+        validateBuffer,
+        validateDictionary,
+        validateEncoding,
+        validateFunction,
+        validateInt32,
+        validateInteger,
+        validateNumber,
+        validateObject,
+        validateOneOf,
+        validatePlainFunction,
+        validatePort,
+        validateSignalName,
+        validateString,
+        validateUint32,
+        validateUndefined,
+        validateUnion,
+        validateAbortSignal,
+        validateLinkHeaderValue
+      };
+    }
+  });
+
+  // node_modules/process/browser.js
+  var require_browser2 = __commonJS({
+    "node_modules/process/browser.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var process3 = module.exports = {};
+      var cachedSetTimeout;
+      var cachedClearTimeout;
+      function defaultSetTimout() {
+        throw new Error("setTimeout has not been defined");
+      }
+      function defaultClearTimeout() {
+        throw new Error("clearTimeout has not been defined");
+      }
+      (function() {
+        try {
+          if (typeof setTimeout === "function") {
+            cachedSetTimeout = setTimeout;
+          } else {
+            cachedSetTimeout = defaultSetTimout;
+          }
+        } catch (e) {
+          cachedSetTimeout = defaultSetTimout;
+        }
+        try {
+          if (typeof clearTimeout === "function") {
+            cachedClearTimeout = clearTimeout;
+          } else {
+            cachedClearTimeout = defaultClearTimeout;
+          }
+        } catch (e) {
+          cachedClearTimeout = defaultClearTimeout;
+        }
+      })();
+      function runTimeout(fun) {
+        if (cachedSetTimeout === setTimeout) {
+          return setTimeout(fun, 0);
+        }
+        if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
+          cachedSetTimeout = setTimeout;
+          return setTimeout(fun, 0);
+        }
+        try {
+          return cachedSetTimeout(fun, 0);
+        } catch (e) {
+          try {
+            return cachedSetTimeout.call(null, fun, 0);
+          } catch (e2) {
+            return cachedSetTimeout.call(this, fun, 0);
+          }
+        }
+      }
+      function runClearTimeout(marker) {
+        if (cachedClearTimeout === clearTimeout) {
+          return clearTimeout(marker);
+        }
+        if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
+          cachedClearTimeout = clearTimeout;
+          return clearTimeout(marker);
+        }
+        try {
+          return cachedClearTimeout(marker);
+        } catch (e) {
+          try {
+            return cachedClearTimeout.call(null, marker);
+          } catch (e2) {
+            return cachedClearTimeout.call(this, marker);
+          }
+        }
+      }
+      var queue3 = [];
+      var draining3 = false;
+      var currentQueue3;
+      var queueIndex3 = -1;
+      function cleanUpNextTick3() {
+        if (!draining3 || !currentQueue3) {
+          return;
+        }
+        draining3 = false;
+        if (currentQueue3.length) {
+          queue3 = currentQueue3.concat(queue3);
+        } else {
+          queueIndex3 = -1;
+        }
+        if (queue3.length) {
+          drainQueue3();
+        }
+      }
+      function drainQueue3() {
+        if (draining3) {
+          return;
+        }
+        var timeout = runTimeout(cleanUpNextTick3);
+        draining3 = true;
+        var len = queue3.length;
+        while (len) {
+          currentQueue3 = queue3;
+          queue3 = [];
+          while (++queueIndex3 < len) {
+            if (currentQueue3) {
+              currentQueue3[queueIndex3].run();
+            }
+          }
+          queueIndex3 = -1;
+          len = queue3.length;
+        }
+        currentQueue3 = null;
+        draining3 = false;
+        runClearTimeout(timeout);
+      }
+      process3.nextTick = function(fun) {
+        var args = new Array(arguments.length - 1);
+        if (arguments.length > 1) {
+          for (var i = 1; i < arguments.length; i++) {
+            args[i - 1] = arguments[i];
+          }
+        }
+        queue3.push(new Item3(fun, args));
+        if (queue3.length === 1 && !draining3) {
+          runTimeout(drainQueue3);
+        }
+      };
+      function Item3(fun, array) {
+        this.fun = fun;
+        this.array = array;
+      }
+      Item3.prototype.run = function() {
+        this.fun.apply(null, this.array);
+      };
+      process3.title = "browser";
+      process3.browser = true;
+      process3.env = {};
+      process3.argv = [];
+      process3.version = "";
+      process3.versions = {};
+      function noop3() {
+      }
+      process3.on = noop3;
+      process3.addListener = noop3;
+      process3.once = noop3;
+      process3.off = noop3;
+      process3.removeListener = noop3;
+      process3.removeAllListeners = noop3;
+      process3.emit = noop3;
+      process3.prependListener = noop3;
+      process3.prependOnceListener = noop3;
+      process3.listeners = function(name2) {
+        return [];
+      };
+      process3.binding = function(name2) {
+        throw new Error("process.binding is not supported");
+      };
+      process3.cwd = function() {
+        return "/";
+      };
+      process3.chdir = function(dir) {
+        throw new Error("process.chdir is not supported");
+      };
+      process3.umask = function() {
+        return 0;
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/utils.js
+  var require_utils = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/utils.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { SymbolAsyncIterator, SymbolIterator, SymbolFor } = require_primordials();
+      var kIsDestroyed = SymbolFor("nodejs.stream.destroyed");
+      var kIsErrored = SymbolFor("nodejs.stream.errored");
+      var kIsReadable = SymbolFor("nodejs.stream.readable");
+      var kIsWritable = SymbolFor("nodejs.stream.writable");
+      var kIsDisturbed = SymbolFor("nodejs.stream.disturbed");
+      var kIsClosedPromise = SymbolFor("nodejs.webstream.isClosedPromise");
+      var kControllerErrorFunction = SymbolFor("nodejs.webstream.controllerErrorFunction");
+      function isReadableNodeStream(obj, strict = false) {
+        var _obj$_readableState;
+        return !!(obj && typeof obj.pipe === "function" && typeof obj.on === "function" && (!strict || typeof obj.pause === "function" && typeof obj.resume === "function") && (!obj._writableState || ((_obj$_readableState = obj._readableState) === null || _obj$_readableState === void 0 ? void 0 : _obj$_readableState.readable) !== false) && // Duplex
+        (!obj._writableState || obj._readableState));
+      }
+      function isWritableNodeStream(obj) {
+        var _obj$_writableState;
+        return !!(obj && typeof obj.write === "function" && typeof obj.on === "function" && (!obj._readableState || ((_obj$_writableState = obj._writableState) === null || _obj$_writableState === void 0 ? void 0 : _obj$_writableState.writable) !== false));
+      }
+      function isDuplexNodeStream(obj) {
+        return !!(obj && typeof obj.pipe === "function" && obj._readableState && typeof obj.on === "function" && typeof obj.write === "function");
+      }
+      function isNodeStream(obj) {
+        return obj && (obj._readableState || obj._writableState || typeof obj.write === "function" && typeof obj.on === "function" || typeof obj.pipe === "function" && typeof obj.on === "function");
+      }
+      function isReadableStream(obj) {
+        return !!(obj && !isNodeStream(obj) && typeof obj.pipeThrough === "function" && typeof obj.getReader === "function" && typeof obj.cancel === "function");
+      }
+      function isWritableStream(obj) {
+        return !!(obj && !isNodeStream(obj) && typeof obj.getWriter === "function" && typeof obj.abort === "function");
+      }
+      function isTransformStream(obj) {
+        return !!(obj && !isNodeStream(obj) && typeof obj.readable === "object" && typeof obj.writable === "object");
+      }
+      function isWebStream(obj) {
+        return isReadableStream(obj) || isWritableStream(obj) || isTransformStream(obj);
+      }
+      function isIterable(obj, isAsync) {
+        if (obj == null) return false;
+        if (isAsync === true) return typeof obj[SymbolAsyncIterator] === "function";
+        if (isAsync === false) return typeof obj[SymbolIterator] === "function";
+        return typeof obj[SymbolAsyncIterator] === "function" || typeof obj[SymbolIterator] === "function";
+      }
+      function isDestroyed(stream) {
+        if (!isNodeStream(stream)) return null;
+        const wState = stream._writableState;
+        const rState = stream._readableState;
+        const state = wState || rState;
+        return !!(stream.destroyed || stream[kIsDestroyed] || state !== null && state !== void 0 && state.destroyed);
+      }
+      function isWritableEnded(stream) {
+        if (!isWritableNodeStream(stream)) return null;
+        if (stream.writableEnded === true) return true;
+        const wState = stream._writableState;
+        if (wState !== null && wState !== void 0 && wState.errored) return false;
+        if (typeof (wState === null || wState === void 0 ? void 0 : wState.ended) !== "boolean") return null;
+        return wState.ended;
+      }
+      function isWritableFinished(stream, strict) {
+        if (!isWritableNodeStream(stream)) return null;
+        if (stream.writableFinished === true) return true;
+        const wState = stream._writableState;
+        if (wState !== null && wState !== void 0 && wState.errored) return false;
+        if (typeof (wState === null || wState === void 0 ? void 0 : wState.finished) !== "boolean") return null;
+        return !!(wState.finished || strict === false && wState.ended === true && wState.length === 0);
+      }
+      function isReadableEnded(stream) {
+        if (!isReadableNodeStream(stream)) return null;
+        if (stream.readableEnded === true) return true;
+        const rState = stream._readableState;
+        if (!rState || rState.errored) return false;
+        if (typeof (rState === null || rState === void 0 ? void 0 : rState.ended) !== "boolean") return null;
+        return rState.ended;
+      }
+      function isReadableFinished(stream, strict) {
+        if (!isReadableNodeStream(stream)) return null;
+        const rState = stream._readableState;
+        if (rState !== null && rState !== void 0 && rState.errored) return false;
+        if (typeof (rState === null || rState === void 0 ? void 0 : rState.endEmitted) !== "boolean") return null;
+        return !!(rState.endEmitted || strict === false && rState.ended === true && rState.length === 0);
+      }
+      function isReadable(stream) {
+        if (stream && stream[kIsReadable] != null) return stream[kIsReadable];
+        if (typeof (stream === null || stream === void 0 ? void 0 : stream.readable) !== "boolean") return null;
+        if (isDestroyed(stream)) return false;
+        return isReadableNodeStream(stream) && stream.readable && !isReadableFinished(stream);
+      }
+      function isWritable(stream) {
+        if (stream && stream[kIsWritable] != null) return stream[kIsWritable];
+        if (typeof (stream === null || stream === void 0 ? void 0 : stream.writable) !== "boolean") return null;
+        if (isDestroyed(stream)) return false;
+        return isWritableNodeStream(stream) && stream.writable && !isWritableEnded(stream);
+      }
+      function isFinished(stream, opts) {
+        if (!isNodeStream(stream)) {
+          return null;
+        }
+        if (isDestroyed(stream)) {
+          return true;
+        }
+        if ((opts === null || opts === void 0 ? void 0 : opts.readable) !== false && isReadable(stream)) {
+          return false;
+        }
+        if ((opts === null || opts === void 0 ? void 0 : opts.writable) !== false && isWritable(stream)) {
+          return false;
+        }
+        return true;
+      }
+      function isWritableErrored(stream) {
+        var _stream$_writableStat, _stream$_writableStat2;
+        if (!isNodeStream(stream)) {
+          return null;
+        }
+        if (stream.writableErrored) {
+          return stream.writableErrored;
+        }
+        return (_stream$_writableStat = (_stream$_writableStat2 = stream._writableState) === null || _stream$_writableStat2 === void 0 ? void 0 : _stream$_writableStat2.errored) !== null && _stream$_writableStat !== void 0 ? _stream$_writableStat : null;
+      }
+      function isReadableErrored(stream) {
+        var _stream$_readableStat, _stream$_readableStat2;
+        if (!isNodeStream(stream)) {
+          return null;
+        }
+        if (stream.readableErrored) {
+          return stream.readableErrored;
+        }
+        return (_stream$_readableStat = (_stream$_readableStat2 = stream._readableState) === null || _stream$_readableStat2 === void 0 ? void 0 : _stream$_readableStat2.errored) !== null && _stream$_readableStat !== void 0 ? _stream$_readableStat : null;
+      }
+      function isClosed(stream) {
+        if (!isNodeStream(stream)) {
+          return null;
+        }
+        if (typeof stream.closed === "boolean") {
+          return stream.closed;
+        }
+        const wState = stream._writableState;
+        const rState = stream._readableState;
+        if (typeof (wState === null || wState === void 0 ? void 0 : wState.closed) === "boolean" || typeof (rState === null || rState === void 0 ? void 0 : rState.closed) === "boolean") {
+          return (wState === null || wState === void 0 ? void 0 : wState.closed) || (rState === null || rState === void 0 ? void 0 : rState.closed);
+        }
+        if (typeof stream._closed === "boolean" && isOutgoingMessage(stream)) {
+          return stream._closed;
+        }
+        return null;
+      }
+      function isOutgoingMessage(stream) {
+        return typeof stream._closed === "boolean" && typeof stream._defaultKeepAlive === "boolean" && typeof stream._removedConnection === "boolean" && typeof stream._removedContLen === "boolean";
+      }
+      function isServerResponse(stream) {
+        return typeof stream._sent100 === "boolean" && isOutgoingMessage(stream);
+      }
+      function isServerRequest(stream) {
+        var _stream$req;
+        return typeof stream._consuming === "boolean" && typeof stream._dumped === "boolean" && ((_stream$req = stream.req) === null || _stream$req === void 0 ? void 0 : _stream$req.upgradeOrConnect) === void 0;
+      }
+      function willEmitClose(stream) {
+        if (!isNodeStream(stream)) return null;
+        const wState = stream._writableState;
+        const rState = stream._readableState;
+        const state = wState || rState;
+        return !state && isServerResponse(stream) || !!(state && state.autoDestroy && state.emitClose && state.closed === false);
+      }
+      function isDisturbed(stream) {
+        var _stream$kIsDisturbed;
+        return !!(stream && ((_stream$kIsDisturbed = stream[kIsDisturbed]) !== null && _stream$kIsDisturbed !== void 0 ? _stream$kIsDisturbed : stream.readableDidRead || stream.readableAborted));
+      }
+      function isErrored(stream) {
+        var _ref, _ref2, _ref3, _ref4, _ref5, _stream$kIsErrored, _stream$_readableStat3, _stream$_writableStat3, _stream$_readableStat4, _stream$_writableStat4;
+        return !!(stream && ((_ref = (_ref2 = (_ref3 = (_ref4 = (_ref5 = (_stream$kIsErrored = stream[kIsErrored]) !== null && _stream$kIsErrored !== void 0 ? _stream$kIsErrored : stream.readableErrored) !== null && _ref5 !== void 0 ? _ref5 : stream.writableErrored) !== null && _ref4 !== void 0 ? _ref4 : (_stream$_readableStat3 = stream._readableState) === null || _stream$_readableStat3 === void 0 ? void 0 : _stream$_readableStat3.errorEmitted) !== null && _ref3 !== void 0 ? _ref3 : (_stream$_writableStat3 = stream._writableState) === null || _stream$_writableStat3 === void 0 ? void 0 : _stream$_writableStat3.errorEmitted) !== null && _ref2 !== void 0 ? _ref2 : (_stream$_readableStat4 = stream._readableState) === null || _stream$_readableStat4 === void 0 ? void 0 : _stream$_readableStat4.errored) !== null && _ref !== void 0 ? _ref : (_stream$_writableStat4 = stream._writableState) === null || _stream$_writableStat4 === void 0 ? void 0 : _stream$_writableStat4.errored));
+      }
+      module.exports = {
+        isDestroyed,
+        kIsDestroyed,
+        isDisturbed,
+        kIsDisturbed,
+        isErrored,
+        kIsErrored,
+        isReadable,
+        kIsReadable,
+        kIsClosedPromise,
+        kControllerErrorFunction,
+        kIsWritable,
+        isClosed,
+        isDuplexNodeStream,
+        isFinished,
+        isIterable,
+        isReadableNodeStream,
+        isReadableStream,
+        isReadableEnded,
+        isReadableFinished,
+        isReadableErrored,
+        isNodeStream,
+        isWebStream,
+        isWritable,
+        isWritableNodeStream,
+        isWritableStream,
+        isWritableEnded,
+        isWritableFinished,
+        isWritableErrored,
+        isServerRequest,
+        isServerResponse,
+        willEmitClose,
+        isTransformStream
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/end-of-stream.js
+  var require_end_of_stream = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/end-of-stream.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var process3 = require_browser2();
+      var { AbortError, codes } = require_errors();
+      var { ERR_INVALID_ARG_TYPE, ERR_STREAM_PREMATURE_CLOSE } = codes;
+      var { kEmptyObject, once: once4 } = require_util();
+      var { validateAbortSignal, validateFunction, validateObject, validateBoolean } = require_validators();
+      var { Promise: Promise2, PromisePrototypeThen, SymbolDispose } = require_primordials();
+      var {
+        isClosed,
+        isReadable,
+        isReadableNodeStream,
+        isReadableStream,
+        isReadableFinished,
+        isReadableErrored,
+        isWritable,
+        isWritableNodeStream,
+        isWritableStream,
+        isWritableFinished,
+        isWritableErrored,
+        isNodeStream,
+        willEmitClose: _willEmitClose,
+        kIsClosedPromise
+      } = require_utils();
+      var addAbortListener;
+      function isRequest(stream) {
+        return stream.setHeader && typeof stream.abort === "function";
+      }
+      var nop = () => {
+      };
+      function eos(stream, options, callback) {
+        var _options$readable, _options$writable;
+        if (arguments.length === 2) {
+          callback = options;
+          options = kEmptyObject;
+        } else if (options == null) {
+          options = kEmptyObject;
+        } else {
+          validateObject(options, "options");
+        }
+        validateFunction(callback, "callback");
+        validateAbortSignal(options.signal, "options.signal");
+        callback = once4(callback);
+        if (isReadableStream(stream) || isWritableStream(stream)) {
+          return eosWeb(stream, options, callback);
+        }
+        if (!isNodeStream(stream)) {
+          throw new ERR_INVALID_ARG_TYPE("stream", ["ReadableStream", "WritableStream", "Stream"], stream);
+        }
+        const readable = (_options$readable = options.readable) !== null && _options$readable !== void 0 ? _options$readable : isReadableNodeStream(stream);
+        const writable = (_options$writable = options.writable) !== null && _options$writable !== void 0 ? _options$writable : isWritableNodeStream(stream);
+        const wState = stream._writableState;
+        const rState = stream._readableState;
+        const onlegacyfinish = () => {
+          if (!stream.writable) {
+            onfinish();
+          }
+        };
+        let willEmitClose = _willEmitClose(stream) && isReadableNodeStream(stream) === readable && isWritableNodeStream(stream) === writable;
+        let writableFinished = isWritableFinished(stream, false);
+        const onfinish = () => {
+          writableFinished = true;
+          if (stream.destroyed) {
+            willEmitClose = false;
+          }
+          if (willEmitClose && (!stream.readable || readable)) {
+            return;
+          }
+          if (!readable || readableFinished) {
+            callback.call(stream);
+          }
+        };
+        let readableFinished = isReadableFinished(stream, false);
+        const onend = () => {
+          readableFinished = true;
+          if (stream.destroyed) {
+            willEmitClose = false;
+          }
+          if (willEmitClose && (!stream.writable || writable)) {
+            return;
+          }
+          if (!writable || writableFinished) {
+            callback.call(stream);
+          }
+        };
+        const onerror = (err) => {
+          callback.call(stream, err);
+        };
+        let closed = isClosed(stream);
+        const onclose = () => {
+          closed = true;
+          const errored = isWritableErrored(stream) || isReadableErrored(stream);
+          if (errored && typeof errored !== "boolean") {
+            return callback.call(stream, errored);
+          }
+          if (readable && !readableFinished && isReadableNodeStream(stream, true)) {
+            if (!isReadableFinished(stream, false)) return callback.call(stream, new ERR_STREAM_PREMATURE_CLOSE());
+          }
+          if (writable && !writableFinished) {
+            if (!isWritableFinished(stream, false)) return callback.call(stream, new ERR_STREAM_PREMATURE_CLOSE());
+          }
+          callback.call(stream);
+        };
+        const onclosed = () => {
+          closed = true;
+          const errored = isWritableErrored(stream) || isReadableErrored(stream);
+          if (errored && typeof errored !== "boolean") {
+            return callback.call(stream, errored);
+          }
+          callback.call(stream);
+        };
+        const onrequest = () => {
+          stream.req.on("finish", onfinish);
+        };
+        if (isRequest(stream)) {
+          stream.on("complete", onfinish);
+          if (!willEmitClose) {
+            stream.on("abort", onclose);
+          }
+          if (stream.req) {
+            onrequest();
+          } else {
+            stream.on("request", onrequest);
+          }
+        } else if (writable && !wState) {
+          stream.on("end", onlegacyfinish);
+          stream.on("close", onlegacyfinish);
+        }
+        if (!willEmitClose && typeof stream.aborted === "boolean") {
+          stream.on("aborted", onclose);
+        }
+        stream.on("end", onend);
+        stream.on("finish", onfinish);
+        if (options.error !== false) {
+          stream.on("error", onerror);
+        }
+        stream.on("close", onclose);
+        if (closed) {
+          process3.nextTick(onclose);
+        } else if (wState !== null && wState !== void 0 && wState.errorEmitted || rState !== null && rState !== void 0 && rState.errorEmitted) {
+          if (!willEmitClose) {
+            process3.nextTick(onclosed);
+          }
+        } else if (!readable && (!willEmitClose || isReadable(stream)) && (writableFinished || isWritable(stream) === false)) {
+          process3.nextTick(onclosed);
+        } else if (!writable && (!willEmitClose || isWritable(stream)) && (readableFinished || isReadable(stream) === false)) {
+          process3.nextTick(onclosed);
+        } else if (rState && stream.req && stream.aborted) {
+          process3.nextTick(onclosed);
+        }
+        const cleanup = () => {
+          callback = nop;
+          stream.removeListener("aborted", onclose);
+          stream.removeListener("complete", onfinish);
+          stream.removeListener("abort", onclose);
+          stream.removeListener("request", onrequest);
+          if (stream.req) stream.req.removeListener("finish", onfinish);
+          stream.removeListener("end", onlegacyfinish);
+          stream.removeListener("close", onlegacyfinish);
+          stream.removeListener("finish", onfinish);
+          stream.removeListener("end", onend);
+          stream.removeListener("error", onerror);
+          stream.removeListener("close", onclose);
+        };
+        if (options.signal && !closed) {
+          const abort3 = () => {
+            const endCallback = callback;
+            cleanup();
+            endCallback.call(
+              stream,
+              new AbortError(void 0, {
+                cause: options.signal.reason
+              })
+            );
+          };
+          if (options.signal.aborted) {
+            process3.nextTick(abort3);
+          } else {
+            addAbortListener = addAbortListener || require_util().addAbortListener;
+            const disposable = addAbortListener(options.signal, abort3);
+            const originalCallback = callback;
+            callback = once4((...args) => {
+              disposable[SymbolDispose]();
+              originalCallback.apply(stream, args);
+            });
+          }
+        }
+        return cleanup;
+      }
+      function eosWeb(stream, options, callback) {
+        let isAborted = false;
+        let abort3 = nop;
+        if (options.signal) {
+          abort3 = () => {
+            isAborted = true;
+            callback.call(
+              stream,
+              new AbortError(void 0, {
+                cause: options.signal.reason
+              })
+            );
+          };
+          if (options.signal.aborted) {
+            process3.nextTick(abort3);
+          } else {
+            addAbortListener = addAbortListener || require_util().addAbortListener;
+            const disposable = addAbortListener(options.signal, abort3);
+            const originalCallback = callback;
+            callback = once4((...args) => {
+              disposable[SymbolDispose]();
+              originalCallback.apply(stream, args);
+            });
+          }
+        }
+        const resolverFn = (...args) => {
+          if (!isAborted) {
+            process3.nextTick(() => callback.apply(stream, args));
+          }
+        };
+        PromisePrototypeThen(stream[kIsClosedPromise].promise, resolverFn, resolverFn);
+        return nop;
+      }
+      function finished(stream, opts) {
+        var _opts;
+        let autoCleanup = false;
+        if (opts === null) {
+          opts = kEmptyObject;
+        }
+        if ((_opts = opts) !== null && _opts !== void 0 && _opts.cleanup) {
+          validateBoolean(opts.cleanup, "cleanup");
+          autoCleanup = opts.cleanup;
+        }
+        return new Promise2((resolve2, reject) => {
+          const cleanup = eos(stream, opts, (err) => {
+            if (autoCleanup) {
+              cleanup();
+            }
+            if (err) {
+              reject(err);
+            } else {
+              resolve2();
+            }
+          });
+        });
+      }
+      module.exports = eos;
+      module.exports.finished = finished;
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/destroy.js
+  var require_destroy = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/destroy.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var process3 = require_browser2();
+      var {
+        aggregateTwoErrors,
+        codes: { ERR_MULTIPLE_CALLBACK },
+        AbortError
+      } = require_errors();
+      var { Symbol: Symbol2 } = require_primordials();
+      var { kIsDestroyed, isDestroyed, isFinished, isServerRequest } = require_utils();
+      var kDestroy = Symbol2("kDestroy");
+      var kConstruct = Symbol2("kConstruct");
+      function checkError(err, w, r) {
+        if (err) {
+          err.stack;
+          if (w && !w.errored) {
+            w.errored = err;
+          }
+          if (r && !r.errored) {
+            r.errored = err;
+          }
+        }
+      }
+      function destroy(err, cb) {
+        const r = this._readableState;
+        const w = this._writableState;
+        const s = w || r;
+        if (w !== null && w !== void 0 && w.destroyed || r !== null && r !== void 0 && r.destroyed) {
+          if (typeof cb === "function") {
+            cb();
+          }
+          return this;
+        }
+        checkError(err, w, r);
+        if (w) {
+          w.destroyed = true;
+        }
+        if (r) {
+          r.destroyed = true;
+        }
+        if (!s.constructed) {
+          this.once(kDestroy, function(er) {
+            _destroy(this, aggregateTwoErrors(er, err), cb);
+          });
+        } else {
+          _destroy(this, err, cb);
+        }
+        return this;
+      }
+      function _destroy(self2, err, cb) {
+        let called = false;
+        function onDestroy(err2) {
+          if (called) {
+            return;
+          }
+          called = true;
+          const r = self2._readableState;
+          const w = self2._writableState;
+          checkError(err2, w, r);
+          if (w) {
+            w.closed = true;
+          }
+          if (r) {
+            r.closed = true;
+          }
+          if (typeof cb === "function") {
+            cb(err2);
+          }
+          if (err2) {
+            process3.nextTick(emitErrorCloseNT, self2, err2);
+          } else {
+            process3.nextTick(emitCloseNT, self2);
+          }
+        }
+        try {
+          self2._destroy(err || null, onDestroy);
+        } catch (err2) {
+          onDestroy(err2);
+        }
+      }
+      function emitErrorCloseNT(self2, err) {
+        emitErrorNT(self2, err);
+        emitCloseNT(self2);
+      }
+      function emitCloseNT(self2) {
+        const r = self2._readableState;
+        const w = self2._writableState;
+        if (w) {
+          w.closeEmitted = true;
+        }
+        if (r) {
+          r.closeEmitted = true;
+        }
+        if (w !== null && w !== void 0 && w.emitClose || r !== null && r !== void 0 && r.emitClose) {
+          self2.emit("close");
+        }
+      }
+      function emitErrorNT(self2, err) {
+        const r = self2._readableState;
+        const w = self2._writableState;
+        if (w !== null && w !== void 0 && w.errorEmitted || r !== null && r !== void 0 && r.errorEmitted) {
+          return;
+        }
+        if (w) {
+          w.errorEmitted = true;
+        }
+        if (r) {
+          r.errorEmitted = true;
+        }
+        self2.emit("error", err);
+      }
+      function undestroy() {
+        const r = this._readableState;
+        const w = this._writableState;
+        if (r) {
+          r.constructed = true;
+          r.closed = false;
+          r.closeEmitted = false;
+          r.destroyed = false;
+          r.errored = null;
+          r.errorEmitted = false;
+          r.reading = false;
+          r.ended = r.readable === false;
+          r.endEmitted = r.readable === false;
+        }
+        if (w) {
+          w.constructed = true;
+          w.destroyed = false;
+          w.closed = false;
+          w.closeEmitted = false;
+          w.errored = null;
+          w.errorEmitted = false;
+          w.finalCalled = false;
+          w.prefinished = false;
+          w.ended = w.writable === false;
+          w.ending = w.writable === false;
+          w.finished = w.writable === false;
+        }
+      }
+      function errorOrDestroy(stream, err, sync) {
+        const r = stream._readableState;
+        const w = stream._writableState;
+        if (w !== null && w !== void 0 && w.destroyed || r !== null && r !== void 0 && r.destroyed) {
+          return this;
+        }
+        if (r !== null && r !== void 0 && r.autoDestroy || w !== null && w !== void 0 && w.autoDestroy)
+          stream.destroy(err);
+        else if (err) {
+          err.stack;
+          if (w && !w.errored) {
+            w.errored = err;
+          }
+          if (r && !r.errored) {
+            r.errored = err;
+          }
+          if (sync) {
+            process3.nextTick(emitErrorNT, stream, err);
+          } else {
+            emitErrorNT(stream, err);
+          }
+        }
+      }
+      function construct(stream, cb) {
+        if (typeof stream._construct !== "function") {
+          return;
+        }
+        const r = stream._readableState;
+        const w = stream._writableState;
+        if (r) {
+          r.constructed = false;
+        }
+        if (w) {
+          w.constructed = false;
+        }
+        stream.once(kConstruct, cb);
+        if (stream.listenerCount(kConstruct) > 1) {
+          return;
+        }
+        process3.nextTick(constructNT, stream);
+      }
+      function constructNT(stream) {
+        let called = false;
+        function onConstruct(err) {
+          if (called) {
+            errorOrDestroy(stream, err !== null && err !== void 0 ? err : new ERR_MULTIPLE_CALLBACK());
+            return;
+          }
+          called = true;
+          const r = stream._readableState;
+          const w = stream._writableState;
+          const s = w || r;
+          if (r) {
+            r.constructed = true;
+          }
+          if (w) {
+            w.constructed = true;
+          }
+          if (s.destroyed) {
+            stream.emit(kDestroy, err);
+          } else if (err) {
+            errorOrDestroy(stream, err, true);
+          } else {
+            process3.nextTick(emitConstructNT, stream);
+          }
+        }
+        try {
+          stream._construct((err) => {
+            process3.nextTick(onConstruct, err);
+          });
+        } catch (err) {
+          process3.nextTick(onConstruct, err);
+        }
+      }
+      function emitConstructNT(stream) {
+        stream.emit(kConstruct);
+      }
+      function isRequest(stream) {
+        return (stream === null || stream === void 0 ? void 0 : stream.setHeader) && typeof stream.abort === "function";
+      }
+      function emitCloseLegacy(stream) {
+        stream.emit("close");
+      }
+      function emitErrorCloseLegacy(stream, err) {
+        stream.emit("error", err);
+        process3.nextTick(emitCloseLegacy, stream);
+      }
+      function destroyer(stream, err) {
+        if (!stream || isDestroyed(stream)) {
+          return;
+        }
+        if (!err && !isFinished(stream)) {
+          err = new AbortError();
+        }
+        if (isServerRequest(stream)) {
+          stream.socket = null;
+          stream.destroy(err);
+        } else if (isRequest(stream)) {
+          stream.abort();
+        } else if (isRequest(stream.req)) {
+          stream.req.abort();
+        } else if (typeof stream.destroy === "function") {
+          stream.destroy(err);
+        } else if (typeof stream.close === "function") {
+          stream.close();
+        } else if (err) {
+          process3.nextTick(emitErrorCloseLegacy, stream, err);
+        } else {
+          process3.nextTick(emitCloseLegacy, stream);
+        }
+        if (!stream.destroyed) {
+          stream[kIsDestroyed] = true;
+        }
+      }
+      module.exports = {
+        construct,
+        destroyer,
+        destroy,
+        undestroy,
+        errorOrDestroy
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/legacy.js
+  var require_legacy = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/legacy.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { ArrayIsArray, ObjectSetPrototypeOf } = require_primordials();
+      var { EventEmitter: EE } = (init_events(), __toCommonJS(events_exports));
+      function Stream(opts) {
+        EE.call(this, opts);
+      }
+      ObjectSetPrototypeOf(Stream.prototype, EE.prototype);
+      ObjectSetPrototypeOf(Stream, EE);
+      Stream.prototype.pipe = function(dest, options) {
+        const source = this;
+        function ondata(chunk) {
+          if (dest.writable && dest.write(chunk) === false && source.pause) {
+            source.pause();
+          }
+        }
+        source.on("data", ondata);
+        function ondrain() {
+          if (source.readable && source.resume) {
+            source.resume();
+          }
+        }
+        dest.on("drain", ondrain);
+        if (!dest._isStdio && (!options || options.end !== false)) {
+          source.on("end", onend);
+          source.on("close", onclose);
+        }
+        let didOnEnd = false;
+        function onend() {
+          if (didOnEnd) return;
+          didOnEnd = true;
+          dest.end();
+        }
+        function onclose() {
+          if (didOnEnd) return;
+          didOnEnd = true;
+          if (typeof dest.destroy === "function") dest.destroy();
+        }
+        function onerror(er) {
+          cleanup();
+          if (EE.listenerCount(this, "error") === 0) {
+            this.emit("error", er);
+          }
+        }
+        prependListener3(source, "error", onerror);
+        prependListener3(dest, "error", onerror);
+        function cleanup() {
+          source.removeListener("data", ondata);
+          dest.removeListener("drain", ondrain);
+          source.removeListener("end", onend);
+          source.removeListener("close", onclose);
+          source.removeListener("error", onerror);
+          dest.removeListener("error", onerror);
+          source.removeListener("end", cleanup);
+          source.removeListener("close", cleanup);
+          dest.removeListener("close", cleanup);
+        }
+        source.on("end", cleanup);
+        source.on("close", cleanup);
+        dest.on("close", cleanup);
+        dest.emit("pipe", source);
+        return dest;
+      };
+      function prependListener3(emitter, event, fn) {
+        if (typeof emitter.prependListener === "function") return emitter.prependListener(event, fn);
+        if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);
+        else if (ArrayIsArray(emitter._events[event])) emitter._events[event].unshift(fn);
+        else emitter._events[event] = [fn, emitter._events[event]];
+      }
+      module.exports = {
+        Stream,
+        prependListener: prependListener3
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/add-abort-signal.js
+  var require_add_abort_signal = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/add-abort-signal.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { SymbolDispose } = require_primordials();
+      var { AbortError, codes } = require_errors();
+      var { isNodeStream, isWebStream, kControllerErrorFunction } = require_utils();
+      var eos = require_end_of_stream();
+      var { ERR_INVALID_ARG_TYPE } = codes;
+      var addAbortListener;
+      var validateAbortSignal = (signal, name2) => {
+        if (typeof signal !== "object" || !("aborted" in signal)) {
+          throw new ERR_INVALID_ARG_TYPE(name2, "AbortSignal", signal);
+        }
+      };
+      module.exports.addAbortSignal = function addAbortSignal(signal, stream) {
+        validateAbortSignal(signal, "signal");
+        if (!isNodeStream(stream) && !isWebStream(stream)) {
+          throw new ERR_INVALID_ARG_TYPE("stream", ["ReadableStream", "WritableStream", "Stream"], stream);
+        }
+        return module.exports.addAbortSignalNoValidate(signal, stream);
+      };
+      module.exports.addAbortSignalNoValidate = function(signal, stream) {
+        if (typeof signal !== "object" || !("aborted" in signal)) {
+          return stream;
+        }
+        const onAbort = isNodeStream(stream) ? () => {
+          stream.destroy(
+            new AbortError(void 0, {
+              cause: signal.reason
+            })
+          );
+        } : () => {
+          stream[kControllerErrorFunction](
+            new AbortError(void 0, {
+              cause: signal.reason
+            })
+          );
+        };
+        if (signal.aborted) {
+          onAbort();
+        } else {
+          addAbortListener = addAbortListener || require_util().addAbortListener;
+          const disposable = addAbortListener(signal, onAbort);
+          eos(stream, disposable[SymbolDispose]);
+        }
+        return stream;
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/buffer_list.js
+  var require_buffer_list = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/buffer_list.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { StringPrototypeSlice, SymbolIterator, TypedArrayPrototypeSet, Uint8Array: Uint8Array2 } = require_primordials();
+      var { Buffer: Buffer3 } = (init_buffer(), __toCommonJS(buffer_exports));
+      var { inspect } = require_util();
+      module.exports = class BufferList {
+        constructor() {
+          this.head = null;
+          this.tail = null;
+          this.length = 0;
+        }
+        push(v) {
+          const entry = {
+            data: v,
+            next: null
+          };
+          if (this.length > 0) this.tail.next = entry;
+          else this.head = entry;
+          this.tail = entry;
+          ++this.length;
+        }
+        unshift(v) {
+          const entry = {
+            data: v,
+            next: this.head
+          };
+          if (this.length === 0) this.tail = entry;
+          this.head = entry;
+          ++this.length;
+        }
+        shift() {
+          if (this.length === 0) return;
+          const ret = this.head.data;
+          if (this.length === 1) this.head = this.tail = null;
+          else this.head = this.head.next;
+          --this.length;
+          return ret;
+        }
+        clear() {
+          this.head = this.tail = null;
+          this.length = 0;
+        }
+        join(s) {
+          if (this.length === 0) return "";
+          let p = this.head;
+          let ret = "" + p.data;
+          while ((p = p.next) !== null) ret += s + p.data;
+          return ret;
+        }
+        concat(n) {
+          if (this.length === 0) return Buffer3.alloc(0);
+          const ret = Buffer3.allocUnsafe(n >>> 0);
+          let p = this.head;
+          let i = 0;
+          while (p) {
+            TypedArrayPrototypeSet(ret, p.data, i);
+            i += p.data.length;
+            p = p.next;
+          }
+          return ret;
+        }
+        // Consumes a specified amount of bytes or characters from the buffered data.
+        consume(n, hasStrings) {
+          const data = this.head.data;
+          if (n < data.length) {
+            const slice = data.slice(0, n);
+            this.head.data = data.slice(n);
+            return slice;
+          }
+          if (n === data.length) {
+            return this.shift();
+          }
+          return hasStrings ? this._getString(n) : this._getBuffer(n);
+        }
+        first() {
+          return this.head.data;
+        }
+        *[SymbolIterator]() {
+          for (let p = this.head; p; p = p.next) {
+            yield p.data;
+          }
+        }
+        // Consumes a specified amount of characters from the buffered data.
+        _getString(n) {
+          let ret = "";
+          let p = this.head;
+          let c = 0;
+          do {
+            const str = p.data;
+            if (n > str.length) {
+              ret += str;
+              n -= str.length;
+            } else {
+              if (n === str.length) {
+                ret += str;
+                ++c;
+                if (p.next) this.head = p.next;
+                else this.head = this.tail = null;
+              } else {
+                ret += StringPrototypeSlice(str, 0, n);
+                this.head = p;
+                p.data = StringPrototypeSlice(str, n);
+              }
+              break;
+            }
+            ++c;
+          } while ((p = p.next) !== null);
+          this.length -= c;
+          return ret;
+        }
+        // Consumes a specified amount of bytes from the buffered data.
+        _getBuffer(n) {
+          const ret = Buffer3.allocUnsafe(n);
+          const retLen = n;
+          let p = this.head;
+          let c = 0;
+          do {
+            const buf = p.data;
+            if (n > buf.length) {
+              TypedArrayPrototypeSet(ret, buf, retLen - n);
+              n -= buf.length;
+            } else {
+              if (n === buf.length) {
+                TypedArrayPrototypeSet(ret, buf, retLen - n);
+                ++c;
+                if (p.next) this.head = p.next;
+                else this.head = this.tail = null;
+              } else {
+                TypedArrayPrototypeSet(ret, new Uint8Array2(buf.buffer, buf.byteOffset, n), retLen - n);
+                this.head = p;
+                p.data = buf.slice(n);
+              }
+              break;
+            }
+            ++c;
+          } while ((p = p.next) !== null);
+          this.length -= c;
+          return ret;
+        }
+        // Make sure the linked list only shows the minimal necessary information.
+        [Symbol.for("nodejs.util.inspect.custom")](_, options) {
+          return inspect(this, {
+            ...options,
+            // Only inspect one level.
+            depth: 0,
+            // It should not recurse.
+            customInspect: false
+          });
+        }
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/state.js
+  var require_state = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/state.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { MathFloor, NumberIsInteger } = require_primordials();
+      var { validateInteger } = require_validators();
+      var { ERR_INVALID_ARG_VALUE } = require_errors().codes;
+      var defaultHighWaterMarkBytes = 16 * 1024;
+      var defaultHighWaterMarkObjectMode = 16;
+      function highWaterMarkFrom(options, isDuplex, duplexKey) {
+        return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null;
+      }
+      function getDefaultHighWaterMark(objectMode) {
+        return objectMode ? defaultHighWaterMarkObjectMode : defaultHighWaterMarkBytes;
+      }
+      function setDefaultHighWaterMark(objectMode, value) {
+        validateInteger(value, "value", 0);
+        if (objectMode) {
+          defaultHighWaterMarkObjectMode = value;
+        } else {
+          defaultHighWaterMarkBytes = value;
+        }
+      }
+      function getHighWaterMark(state, options, duplexKey, isDuplex) {
+        const hwm = highWaterMarkFrom(options, isDuplex, duplexKey);
+        if (hwm != null) {
+          if (!NumberIsInteger(hwm) || hwm < 0) {
+            const name2 = isDuplex ? `options.${duplexKey}` : "options.highWaterMark";
+            throw new ERR_INVALID_ARG_VALUE(name2, hwm);
+          }
+          return MathFloor(hwm);
+        }
+        return getDefaultHighWaterMark(state.objectMode);
+      }
+      module.exports = {
+        getHighWaterMark,
+        getDefaultHighWaterMark,
+        setDefaultHighWaterMark
+      };
+    }
+  });
+
+  // node_modules/safe-buffer/index.js
+  var require_safe_buffer = __commonJS({
+    "node_modules/safe-buffer/index.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var buffer = (init_buffer(), __toCommonJS(buffer_exports));
+      var Buffer3 = buffer.Buffer;
+      function copyProps(src, dst) {
+        for (var key in src) {
+          dst[key] = src[key];
+        }
+      }
+      if (Buffer3.from && Buffer3.alloc && Buffer3.allocUnsafe && Buffer3.allocUnsafeSlow) {
+        module.exports = buffer;
+      } else {
+        copyProps(buffer, exports8);
+        exports8.Buffer = SafeBuffer;
+      }
+      function SafeBuffer(arg, encodingOrOffset, length) {
+        return Buffer3(arg, encodingOrOffset, length);
+      }
+      SafeBuffer.prototype = Object.create(Buffer3.prototype);
+      copyProps(Buffer3, SafeBuffer);
+      SafeBuffer.from = function(arg, encodingOrOffset, length) {
+        if (typeof arg === "number") {
+          throw new TypeError("Argument must not be a number");
+        }
+        return Buffer3(arg, encodingOrOffset, length);
+      };
+      SafeBuffer.alloc = function(size, fill, encoding) {
+        if (typeof size !== "number") {
+          throw new TypeError("Argument must be a number");
+        }
+        var buf = Buffer3(size);
+        if (fill !== void 0) {
+          if (typeof encoding === "string") {
+            buf.fill(fill, encoding);
+          } else {
+            buf.fill(fill);
+          }
+        } else {
+          buf.fill(0);
+        }
+        return buf;
+      };
+      SafeBuffer.allocUnsafe = function(size) {
+        if (typeof size !== "number") {
+          throw new TypeError("Argument must be a number");
+        }
+        return Buffer3(size);
+      };
+      SafeBuffer.allocUnsafeSlow = function(size) {
+        if (typeof size !== "number") {
+          throw new TypeError("Argument must be a number");
+        }
+        return buffer.SlowBuffer(size);
+      };
+    }
+  });
+
+  // node_modules/string_decoder/lib/string_decoder.js
+  var require_string_decoder = __commonJS({
+    "node_modules/string_decoder/lib/string_decoder.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var Buffer3 = require_safe_buffer().Buffer;
+      var isEncoding = Buffer3.isEncoding || function(encoding) {
+        encoding = "" + encoding;
+        switch (encoding && encoding.toLowerCase()) {
+          case "hex":
+          case "utf8":
+          case "utf-8":
+          case "ascii":
+          case "binary":
+          case "base64":
+          case "ucs2":
+          case "ucs-2":
+          case "utf16le":
+          case "utf-16le":
+          case "raw":
+            return true;
+          default:
+            return false;
+        }
+      };
+      function _normalizeEncoding(enc) {
+        if (!enc) return "utf8";
+        var retried;
+        while (true) {
+          switch (enc) {
+            case "utf8":
+            case "utf-8":
+              return "utf8";
+            case "ucs2":
+            case "ucs-2":
+            case "utf16le":
+            case "utf-16le":
+              return "utf16le";
+            case "latin1":
+            case "binary":
+              return "latin1";
+            case "base64":
+            case "ascii":
+            case "hex":
+              return enc;
+            default:
+              if (retried) return;
+              enc = ("" + enc).toLowerCase();
+              retried = true;
+          }
+        }
+      }
+      function normalizeEncoding(enc) {
+        var nenc = _normalizeEncoding(enc);
+        if (typeof nenc !== "string" && (Buffer3.isEncoding === isEncoding || !isEncoding(enc))) throw new Error("Unknown encoding: " + enc);
+        return nenc || enc;
+      }
+      exports8.StringDecoder = StringDecoder;
+      function StringDecoder(encoding) {
+        this.encoding = normalizeEncoding(encoding);
+        var nb;
+        switch (this.encoding) {
+          case "utf16le":
+            this.text = utf16Text;
+            this.end = utf16End;
+            nb = 4;
+            break;
+          case "utf8":
+            this.fillLast = utf8FillLast;
+            nb = 4;
+            break;
+          case "base64":
+            this.text = base64Text;
+            this.end = base64End;
+            nb = 3;
+            break;
+          default:
+            this.write = simpleWrite;
+            this.end = simpleEnd;
+            return;
+        }
+        this.lastNeed = 0;
+        this.lastTotal = 0;
+        this.lastChar = Buffer3.allocUnsafe(nb);
+      }
+      StringDecoder.prototype.write = function(buf) {
+        if (buf.length === 0) return "";
+        var r;
+        var i;
+        if (this.lastNeed) {
+          r = this.fillLast(buf);
+          if (r === void 0) return "";
+          i = this.lastNeed;
+          this.lastNeed = 0;
+        } else {
+          i = 0;
+        }
+        if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i);
+        return r || "";
+      };
+      StringDecoder.prototype.end = utf8End;
+      StringDecoder.prototype.text = utf8Text;
+      StringDecoder.prototype.fillLast = function(buf) {
+        if (this.lastNeed <= buf.length) {
+          buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed);
+          return this.lastChar.toString(this.encoding, 0, this.lastTotal);
+        }
+        buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length);
+        this.lastNeed -= buf.length;
+      };
+      function utf8CheckByte(byte) {
+        if (byte <= 127) return 0;
+        else if (byte >> 5 === 6) return 2;
+        else if (byte >> 4 === 14) return 3;
+        else if (byte >> 3 === 30) return 4;
+        return byte >> 6 === 2 ? -1 : -2;
+      }
+      function utf8CheckIncomplete(self2, buf, i) {
+        var j = buf.length - 1;
+        if (j < i) return 0;
+        var nb = utf8CheckByte(buf[j]);
+        if (nb >= 0) {
+          if (nb > 0) self2.lastNeed = nb - 1;
+          return nb;
+        }
+        if (--j < i || nb === -2) return 0;
+        nb = utf8CheckByte(buf[j]);
+        if (nb >= 0) {
+          if (nb > 0) self2.lastNeed = nb - 2;
+          return nb;
+        }
+        if (--j < i || nb === -2) return 0;
+        nb = utf8CheckByte(buf[j]);
+        if (nb >= 0) {
+          if (nb > 0) {
+            if (nb === 2) nb = 0;
+            else self2.lastNeed = nb - 3;
+          }
+          return nb;
+        }
+        return 0;
+      }
+      function utf8CheckExtraBytes(self2, buf, p) {
+        if ((buf[0] & 192) !== 128) {
+          self2.lastNeed = 0;
+          return "\uFFFD";
+        }
+        if (self2.lastNeed > 1 && buf.length > 1) {
+          if ((buf[1] & 192) !== 128) {
+            self2.lastNeed = 1;
+            return "\uFFFD";
+          }
+          if (self2.lastNeed > 2 && buf.length > 2) {
+            if ((buf[2] & 192) !== 128) {
+              self2.lastNeed = 2;
+              return "\uFFFD";
+            }
+          }
+        }
+      }
+      function utf8FillLast(buf) {
+        var p = this.lastTotal - this.lastNeed;
+        var r = utf8CheckExtraBytes(this, buf, p);
+        if (r !== void 0) return r;
+        if (this.lastNeed <= buf.length) {
+          buf.copy(this.lastChar, p, 0, this.lastNeed);
+          return this.lastChar.toString(this.encoding, 0, this.lastTotal);
+        }
+        buf.copy(this.lastChar, p, 0, buf.length);
+        this.lastNeed -= buf.length;
+      }
+      function utf8Text(buf, i) {
+        var total = utf8CheckIncomplete(this, buf, i);
+        if (!this.lastNeed) return buf.toString("utf8", i);
+        this.lastTotal = total;
+        var end = buf.length - (total - this.lastNeed);
+        buf.copy(this.lastChar, 0, end);
+        return buf.toString("utf8", i, end);
+      }
+      function utf8End(buf) {
+        var r = buf && buf.length ? this.write(buf) : "";
+        if (this.lastNeed) return r + "\uFFFD";
+        return r;
+      }
+      function utf16Text(buf, i) {
+        if ((buf.length - i) % 2 === 0) {
+          var r = buf.toString("utf16le", i);
+          if (r) {
+            var c = r.charCodeAt(r.length - 1);
+            if (c >= 55296 && c <= 56319) {
+              this.lastNeed = 2;
+              this.lastTotal = 4;
+              this.lastChar[0] = buf[buf.length - 2];
+              this.lastChar[1] = buf[buf.length - 1];
+              return r.slice(0, -1);
+            }
+          }
+          return r;
+        }
+        this.lastNeed = 1;
+        this.lastTotal = 2;
+        this.lastChar[0] = buf[buf.length - 1];
+        return buf.toString("utf16le", i, buf.length - 1);
+      }
+      function utf16End(buf) {
+        var r = buf && buf.length ? this.write(buf) : "";
+        if (this.lastNeed) {
+          var end = this.lastTotal - this.lastNeed;
+          return r + this.lastChar.toString("utf16le", 0, end);
+        }
+        return r;
+      }
+      function base64Text(buf, i) {
+        var n = (buf.length - i) % 3;
+        if (n === 0) return buf.toString("base64", i);
+        this.lastNeed = 3 - n;
+        this.lastTotal = 3;
+        if (n === 1) {
+          this.lastChar[0] = buf[buf.length - 1];
+        } else {
+          this.lastChar[0] = buf[buf.length - 2];
+          this.lastChar[1] = buf[buf.length - 1];
+        }
+        return buf.toString("base64", i, buf.length - n);
+      }
+      function base64End(buf) {
+        var r = buf && buf.length ? this.write(buf) : "";
+        if (this.lastNeed) return r + this.lastChar.toString("base64", 0, 3 - this.lastNeed);
+        return r;
+      }
+      function simpleWrite(buf) {
+        return buf.toString(this.encoding);
+      }
+      function simpleEnd(buf) {
+        return buf && buf.length ? this.write(buf) : "";
+      }
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/from.js
+  var require_from = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/from.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var process3 = require_browser2();
+      var { PromisePrototypeThen, SymbolAsyncIterator, SymbolIterator } = require_primordials();
+      var { Buffer: Buffer3 } = (init_buffer(), __toCommonJS(buffer_exports));
+      var { ERR_INVALID_ARG_TYPE, ERR_STREAM_NULL_VALUES } = require_errors().codes;
+      function from(Readable, iterable, opts) {
+        let iterator;
+        if (typeof iterable === "string" || iterable instanceof Buffer3) {
+          return new Readable({
+            objectMode: true,
+            ...opts,
+            read() {
+              this.push(iterable);
+              this.push(null);
+            }
+          });
+        }
+        let isAsync;
+        if (iterable && iterable[SymbolAsyncIterator]) {
+          isAsync = true;
+          iterator = iterable[SymbolAsyncIterator]();
+        } else if (iterable && iterable[SymbolIterator]) {
+          isAsync = false;
+          iterator = iterable[SymbolIterator]();
+        } else {
+          throw new ERR_INVALID_ARG_TYPE("iterable", ["Iterable"], iterable);
+        }
+        const readable = new Readable({
+          objectMode: true,
+          highWaterMark: 1,
+          // TODO(ronag): What options should be allowed?
+          ...opts
+        });
+        let reading = false;
+        readable._read = function() {
+          if (!reading) {
+            reading = true;
+            next();
+          }
+        };
+        readable._destroy = function(error, cb) {
+          PromisePrototypeThen(
+            close(error),
+            () => process3.nextTick(cb, error),
+            // nextTick is here in case cb throws
+            (e) => process3.nextTick(cb, e || error)
+          );
+        };
+        async function close(error) {
+          const hadError = error !== void 0 && error !== null;
+          const hasThrow = typeof iterator.throw === "function";
+          if (hadError && hasThrow) {
+            const { value, done } = await iterator.throw(error);
+            await value;
+            if (done) {
+              return;
+            }
+          }
+          if (typeof iterator.return === "function") {
+            const { value } = await iterator.return();
+            await value;
+          }
+        }
+        async function next() {
+          for (; ; ) {
+            try {
+              const { value, done } = isAsync ? await iterator.next() : iterator.next();
+              if (done) {
+                readable.push(null);
+              } else {
+                const res = value && typeof value.then === "function" ? await value : value;
+                if (res === null) {
+                  reading = false;
+                  throw new ERR_STREAM_NULL_VALUES();
+                } else if (readable.push(res)) {
+                  continue;
+                } else {
+                  reading = false;
+                }
+              }
+            } catch (err) {
+              readable.destroy(err);
+            }
+            break;
+          }
+        }
+        return readable;
+      }
+      module.exports = from;
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/readable.js
+  var require_readable = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/readable.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var process3 = require_browser2();
+      var {
+        ArrayPrototypeIndexOf,
+        NumberIsInteger,
+        NumberIsNaN,
+        NumberParseInt,
+        ObjectDefineProperties,
+        ObjectKeys,
+        ObjectSetPrototypeOf,
+        Promise: Promise2,
+        SafeSet,
+        SymbolAsyncDispose,
+        SymbolAsyncIterator,
+        Symbol: Symbol2
+      } = require_primordials();
+      module.exports = Readable;
+      Readable.ReadableState = ReadableState;
+      var { EventEmitter: EE } = (init_events(), __toCommonJS(events_exports));
+      var { Stream, prependListener: prependListener3 } = require_legacy();
+      var { Buffer: Buffer3 } = (init_buffer(), __toCommonJS(buffer_exports));
+      var { addAbortSignal } = require_add_abort_signal();
+      var eos = require_end_of_stream();
+      var debug = require_util().debuglog("stream", (fn) => {
+        debug = fn;
+      });
+      var BufferList = require_buffer_list();
+      var destroyImpl = require_destroy();
+      var { getHighWaterMark, getDefaultHighWaterMark } = require_state();
+      var {
+        aggregateTwoErrors,
+        codes: {
+          ERR_INVALID_ARG_TYPE,
+          ERR_METHOD_NOT_IMPLEMENTED,
+          ERR_OUT_OF_RANGE,
+          ERR_STREAM_PUSH_AFTER_EOF,
+          ERR_STREAM_UNSHIFT_AFTER_END_EVENT
+        },
+        AbortError
+      } = require_errors();
+      var { validateObject } = require_validators();
+      var kPaused = Symbol2("kPaused");
+      var { StringDecoder } = require_string_decoder();
+      var from = require_from();
+      ObjectSetPrototypeOf(Readable.prototype, Stream.prototype);
+      ObjectSetPrototypeOf(Readable, Stream);
+      var nop = () => {
+      };
+      var { errorOrDestroy } = destroyImpl;
+      var kObjectMode = 1 << 0;
+      var kEnded = 1 << 1;
+      var kEndEmitted = 1 << 2;
+      var kReading = 1 << 3;
+      var kConstructed = 1 << 4;
+      var kSync = 1 << 5;
+      var kNeedReadable = 1 << 6;
+      var kEmittedReadable = 1 << 7;
+      var kReadableListening = 1 << 8;
+      var kResumeScheduled = 1 << 9;
+      var kErrorEmitted = 1 << 10;
+      var kEmitClose = 1 << 11;
+      var kAutoDestroy = 1 << 12;
+      var kDestroyed = 1 << 13;
+      var kClosed = 1 << 14;
+      var kCloseEmitted = 1 << 15;
+      var kMultiAwaitDrain = 1 << 16;
+      var kReadingMore = 1 << 17;
+      var kDataEmitted = 1 << 18;
+      function makeBitMapDescriptor(bit) {
+        return {
+          enumerable: false,
+          get() {
+            return (this.state & bit) !== 0;
+          },
+          set(value) {
+            if (value) this.state |= bit;
+            else this.state &= ~bit;
+          }
+        };
+      }
+      ObjectDefineProperties(ReadableState.prototype, {
+        objectMode: makeBitMapDescriptor(kObjectMode),
+        ended: makeBitMapDescriptor(kEnded),
+        endEmitted: makeBitMapDescriptor(kEndEmitted),
+        reading: makeBitMapDescriptor(kReading),
+        // Stream is still being constructed and cannot be
+        // destroyed until construction finished or failed.
+        // Async construction is opt in, therefore we start as
+        // constructed.
+        constructed: makeBitMapDescriptor(kConstructed),
+        // A flag to be able to tell if the event 'readable'/'data' is emitted
+        // immediately, or on a later tick.  We set this to true at first, because
+        // any actions that shouldn't happen until "later" should generally also
+        // not happen before the first read call.
+        sync: makeBitMapDescriptor(kSync),
+        // Whenever we return null, then we set a flag to say
+        // that we're awaiting a 'readable' event emission.
+        needReadable: makeBitMapDescriptor(kNeedReadable),
+        emittedReadable: makeBitMapDescriptor(kEmittedReadable),
+        readableListening: makeBitMapDescriptor(kReadableListening),
+        resumeScheduled: makeBitMapDescriptor(kResumeScheduled),
+        // True if the error was already emitted and should not be thrown again.
+        errorEmitted: makeBitMapDescriptor(kErrorEmitted),
+        emitClose: makeBitMapDescriptor(kEmitClose),
+        autoDestroy: makeBitMapDescriptor(kAutoDestroy),
+        // Has it been destroyed.
+        destroyed: makeBitMapDescriptor(kDestroyed),
+        // Indicates whether the stream has finished destroying.
+        closed: makeBitMapDescriptor(kClosed),
+        // True if close has been emitted or would have been emitted
+        // depending on emitClose.
+        closeEmitted: makeBitMapDescriptor(kCloseEmitted),
+        multiAwaitDrain: makeBitMapDescriptor(kMultiAwaitDrain),
+        // If true, a maybeReadMore has been scheduled.
+        readingMore: makeBitMapDescriptor(kReadingMore),
+        dataEmitted: makeBitMapDescriptor(kDataEmitted)
+      });
+      function ReadableState(options, stream, isDuplex) {
+        if (typeof isDuplex !== "boolean") isDuplex = stream instanceof require_duplex();
+        this.state = kEmitClose | kAutoDestroy | kConstructed | kSync;
+        if (options && options.objectMode) this.state |= kObjectMode;
+        if (isDuplex && options && options.readableObjectMode) this.state |= kObjectMode;
+        this.highWaterMark = options ? getHighWaterMark(this, options, "readableHighWaterMark", isDuplex) : getDefaultHighWaterMark(false);
+        this.buffer = new BufferList();
+        this.length = 0;
+        this.pipes = [];
+        this.flowing = null;
+        this[kPaused] = null;
+        if (options && options.emitClose === false) this.state &= ~kEmitClose;
+        if (options && options.autoDestroy === false) this.state &= ~kAutoDestroy;
+        this.errored = null;
+        this.defaultEncoding = options && options.defaultEncoding || "utf8";
+        this.awaitDrainWriters = null;
+        this.decoder = null;
+        this.encoding = null;
+        if (options && options.encoding) {
+          this.decoder = new StringDecoder(options.encoding);
+          this.encoding = options.encoding;
+        }
+      }
+      function Readable(options) {
+        if (!(this instanceof Readable)) return new Readable(options);
+        const isDuplex = this instanceof require_duplex();
+        this._readableState = new ReadableState(options, this, isDuplex);
+        if (options) {
+          if (typeof options.read === "function") this._read = options.read;
+          if (typeof options.destroy === "function") this._destroy = options.destroy;
+          if (typeof options.construct === "function") this._construct = options.construct;
+          if (options.signal && !isDuplex) addAbortSignal(options.signal, this);
+        }
+        Stream.call(this, options);
+        destroyImpl.construct(this, () => {
+          if (this._readableState.needReadable) {
+            maybeReadMore(this, this._readableState);
+          }
+        });
+      }
+      Readable.prototype.destroy = destroyImpl.destroy;
+      Readable.prototype._undestroy = destroyImpl.undestroy;
+      Readable.prototype._destroy = function(err, cb) {
+        cb(err);
+      };
+      Readable.prototype[EE.captureRejectionSymbol] = function(err) {
+        this.destroy(err);
+      };
+      Readable.prototype[SymbolAsyncDispose] = function() {
+        let error;
+        if (!this.destroyed) {
+          error = this.readableEnded ? null : new AbortError();
+          this.destroy(error);
+        }
+        return new Promise2((resolve2, reject) => eos(this, (err) => err && err !== error ? reject(err) : resolve2(null)));
+      };
+      Readable.prototype.push = function(chunk, encoding) {
+        return readableAddChunk(this, chunk, encoding, false);
+      };
+      Readable.prototype.unshift = function(chunk, encoding) {
+        return readableAddChunk(this, chunk, encoding, true);
+      };
+      function readableAddChunk(stream, chunk, encoding, addToFront) {
+        debug("readableAddChunk", chunk);
+        const state = stream._readableState;
+        let err;
+        if ((state.state & kObjectMode) === 0) {
+          if (typeof chunk === "string") {
+            encoding = encoding || state.defaultEncoding;
+            if (state.encoding !== encoding) {
+              if (addToFront && state.encoding) {
+                chunk = Buffer3.from(chunk, encoding).toString(state.encoding);
+              } else {
+                chunk = Buffer3.from(chunk, encoding);
+                encoding = "";
+              }
+            }
+          } else if (chunk instanceof Buffer3) {
+            encoding = "";
+          } else if (Stream._isUint8Array(chunk)) {
+            chunk = Stream._uint8ArrayToBuffer(chunk);
+            encoding = "";
+          } else if (chunk != null) {
+            err = new ERR_INVALID_ARG_TYPE("chunk", ["string", "Buffer", "Uint8Array"], chunk);
+          }
+        }
+        if (err) {
+          errorOrDestroy(stream, err);
+        } else if (chunk === null) {
+          state.state &= ~kReading;
+          onEofChunk(stream, state);
+        } else if ((state.state & kObjectMode) !== 0 || chunk && chunk.length > 0) {
+          if (addToFront) {
+            if ((state.state & kEndEmitted) !== 0) errorOrDestroy(stream, new ERR_STREAM_UNSHIFT_AFTER_END_EVENT());
+            else if (state.destroyed || state.errored) return false;
+            else addChunk(stream, state, chunk, true);
+          } else if (state.ended) {
+            errorOrDestroy(stream, new ERR_STREAM_PUSH_AFTER_EOF());
+          } else if (state.destroyed || state.errored) {
+            return false;
+          } else {
+            state.state &= ~kReading;
+            if (state.decoder && !encoding) {
+              chunk = state.decoder.write(chunk);
+              if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false);
+              else maybeReadMore(stream, state);
+            } else {
+              addChunk(stream, state, chunk, false);
+            }
+          }
+        } else if (!addToFront) {
+          state.state &= ~kReading;
+          maybeReadMore(stream, state);
+        }
+        return !state.ended && (state.length < state.highWaterMark || state.length === 0);
+      }
+      function addChunk(stream, state, chunk, addToFront) {
+        if (state.flowing && state.length === 0 && !state.sync && stream.listenerCount("data") > 0) {
+          if ((state.state & kMultiAwaitDrain) !== 0) {
+            state.awaitDrainWriters.clear();
+          } else {
+            state.awaitDrainWriters = null;
+          }
+          state.dataEmitted = true;
+          stream.emit("data", chunk);
+        } else {
+          state.length += state.objectMode ? 1 : chunk.length;
+          if (addToFront) state.buffer.unshift(chunk);
+          else state.buffer.push(chunk);
+          if ((state.state & kNeedReadable) !== 0) emitReadable(stream);
+        }
+        maybeReadMore(stream, state);
+      }
+      Readable.prototype.isPaused = function() {
+        const state = this._readableState;
+        return state[kPaused] === true || state.flowing === false;
+      };
+      Readable.prototype.setEncoding = function(enc) {
+        const decoder = new StringDecoder(enc);
+        this._readableState.decoder = decoder;
+        this._readableState.encoding = this._readableState.decoder.encoding;
+        const buffer = this._readableState.buffer;
+        let content = "";
+        for (const data of buffer) {
+          content += decoder.write(data);
+        }
+        buffer.clear();
+        if (content !== "") buffer.push(content);
+        this._readableState.length = content.length;
+        return this;
+      };
+      var MAX_HWM = 1073741824;
+      function computeNewHighWaterMark(n) {
+        if (n > MAX_HWM) {
+          throw new ERR_OUT_OF_RANGE("size", "<= 1GiB", n);
+        } else {
+          n--;
+          n |= n >>> 1;
+          n |= n >>> 2;
+          n |= n >>> 4;
+          n |= n >>> 8;
+          n |= n >>> 16;
+          n++;
+        }
+        return n;
+      }
+      function howMuchToRead(n, state) {
+        if (n <= 0 || state.length === 0 && state.ended) return 0;
+        if ((state.state & kObjectMode) !== 0) return 1;
+        if (NumberIsNaN(n)) {
+          if (state.flowing && state.length) return state.buffer.first().length;
+          return state.length;
+        }
+        if (n <= state.length) return n;
+        return state.ended ? state.length : 0;
+      }
+      Readable.prototype.read = function(n) {
+        debug("read", n);
+        if (n === void 0) {
+          n = NaN;
+        } else if (!NumberIsInteger(n)) {
+          n = NumberParseInt(n, 10);
+        }
+        const state = this._readableState;
+        const nOrig = n;
+        if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
+        if (n !== 0) state.state &= ~kEmittedReadable;
+        if (n === 0 && state.needReadable && ((state.highWaterMark !== 0 ? state.length >= state.highWaterMark : state.length > 0) || state.ended)) {
+          debug("read: emitReadable", state.length, state.ended);
+          if (state.length === 0 && state.ended) endReadable(this);
+          else emitReadable(this);
+          return null;
+        }
+        n = howMuchToRead(n, state);
+        if (n === 0 && state.ended) {
+          if (state.length === 0) endReadable(this);
+          return null;
+        }
+        let doRead = (state.state & kNeedReadable) !== 0;
+        debug("need readable", doRead);
+        if (state.length === 0 || state.length - n < state.highWaterMark) {
+          doRead = true;
+          debug("length less than watermark", doRead);
+        }
+        if (state.ended || state.reading || state.destroyed || state.errored || !state.constructed) {
+          doRead = false;
+          debug("reading, ended or constructing", doRead);
+        } else if (doRead) {
+          debug("do read");
+          state.state |= kReading | kSync;
+          if (state.length === 0) state.state |= kNeedReadable;
+          try {
+            this._read(state.highWaterMark);
+          } catch (err) {
+            errorOrDestroy(this, err);
+          }
+          state.state &= ~kSync;
+          if (!state.reading) n = howMuchToRead(nOrig, state);
+        }
+        let ret;
+        if (n > 0) ret = fromList(n, state);
+        else ret = null;
+        if (ret === null) {
+          state.needReadable = state.length <= state.highWaterMark;
+          n = 0;
+        } else {
+          state.length -= n;
+          if (state.multiAwaitDrain) {
+            state.awaitDrainWriters.clear();
+          } else {
+            state.awaitDrainWriters = null;
+          }
+        }
+        if (state.length === 0) {
+          if (!state.ended) state.needReadable = true;
+          if (nOrig !== n && state.ended) endReadable(this);
+        }
+        if (ret !== null && !state.errorEmitted && !state.closeEmitted) {
+          state.dataEmitted = true;
+          this.emit("data", ret);
+        }
+        return ret;
+      };
+      function onEofChunk(stream, state) {
+        debug("onEofChunk");
+        if (state.ended) return;
+        if (state.decoder) {
+          const chunk = state.decoder.end();
+          if (chunk && chunk.length) {
+            state.buffer.push(chunk);
+            state.length += state.objectMode ? 1 : chunk.length;
+          }
+        }
+        state.ended = true;
+        if (state.sync) {
+          emitReadable(stream);
+        } else {
+          state.needReadable = false;
+          state.emittedReadable = true;
+          emitReadable_(stream);
+        }
+      }
+      function emitReadable(stream) {
+        const state = stream._readableState;
+        debug("emitReadable", state.needReadable, state.emittedReadable);
+        state.needReadable = false;
+        if (!state.emittedReadable) {
+          debug("emitReadable", state.flowing);
+          state.emittedReadable = true;
+          process3.nextTick(emitReadable_, stream);
+        }
+      }
+      function emitReadable_(stream) {
+        const state = stream._readableState;
+        debug("emitReadable_", state.destroyed, state.length, state.ended);
+        if (!state.destroyed && !state.errored && (state.length || state.ended)) {
+          stream.emit("readable");
+          state.emittedReadable = false;
+        }
+        state.needReadable = !state.flowing && !state.ended && state.length <= state.highWaterMark;
+        flow(stream);
+      }
+      function maybeReadMore(stream, state) {
+        if (!state.readingMore && state.constructed) {
+          state.readingMore = true;
+          process3.nextTick(maybeReadMore_, stream, state);
+        }
+      }
+      function maybeReadMore_(stream, state) {
+        while (!state.reading && !state.ended && (state.length < state.highWaterMark || state.flowing && state.length === 0)) {
+          const len = state.length;
+          debug("maybeReadMore read 0");
+          stream.read(0);
+          if (len === state.length)
+            break;
+        }
+        state.readingMore = false;
+      }
+      Readable.prototype._read = function(n) {
+        throw new ERR_METHOD_NOT_IMPLEMENTED("_read()");
+      };
+      Readable.prototype.pipe = function(dest, pipeOpts) {
+        const src = this;
+        const state = this._readableState;
+        if (state.pipes.length === 1) {
+          if (!state.multiAwaitDrain) {
+            state.multiAwaitDrain = true;
+            state.awaitDrainWriters = new SafeSet(state.awaitDrainWriters ? [state.awaitDrainWriters] : []);
+          }
+        }
+        state.pipes.push(dest);
+        debug("pipe count=%d opts=%j", state.pipes.length, pipeOpts);
+        const doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process3.stdout && dest !== process3.stderr;
+        const endFn = doEnd ? onend : unpipe;
+        if (state.endEmitted) process3.nextTick(endFn);
+        else src.once("end", endFn);
+        dest.on("unpipe", onunpipe);
+        function onunpipe(readable, unpipeInfo) {
+          debug("onunpipe");
+          if (readable === src) {
+            if (unpipeInfo && unpipeInfo.hasUnpiped === false) {
+              unpipeInfo.hasUnpiped = true;
+              cleanup();
+            }
+          }
+        }
+        function onend() {
+          debug("onend");
+          dest.end();
+        }
+        let ondrain;
+        let cleanedUp = false;
+        function cleanup() {
+          debug("cleanup");
+          dest.removeListener("close", onclose);
+          dest.removeListener("finish", onfinish);
+          if (ondrain) {
+            dest.removeListener("drain", ondrain);
+          }
+          dest.removeListener("error", onerror);
+          dest.removeListener("unpipe", onunpipe);
+          src.removeListener("end", onend);
+          src.removeListener("end", unpipe);
+          src.removeListener("data", ondata);
+          cleanedUp = true;
+          if (ondrain && state.awaitDrainWriters && (!dest._writableState || dest._writableState.needDrain)) ondrain();
+        }
+        function pause() {
+          if (!cleanedUp) {
+            if (state.pipes.length === 1 && state.pipes[0] === dest) {
+              debug("false write response, pause", 0);
+              state.awaitDrainWriters = dest;
+              state.multiAwaitDrain = false;
+            } else if (state.pipes.length > 1 && state.pipes.includes(dest)) {
+              debug("false write response, pause", state.awaitDrainWriters.size);
+              state.awaitDrainWriters.add(dest);
+            }
+            src.pause();
+          }
+          if (!ondrain) {
+            ondrain = pipeOnDrain(src, dest);
+            dest.on("drain", ondrain);
+          }
+        }
+        src.on("data", ondata);
+        function ondata(chunk) {
+          debug("ondata");
+          const ret = dest.write(chunk);
+          debug("dest.write", ret);
+          if (ret === false) {
+            pause();
+          }
+        }
+        function onerror(er) {
+          debug("onerror", er);
+          unpipe();
+          dest.removeListener("error", onerror);
+          if (dest.listenerCount("error") === 0) {
+            const s = dest._writableState || dest._readableState;
+            if (s && !s.errorEmitted) {
+              errorOrDestroy(dest, er);
+            } else {
+              dest.emit("error", er);
+            }
+          }
+        }
+        prependListener3(dest, "error", onerror);
+        function onclose() {
+          dest.removeListener("finish", onfinish);
+          unpipe();
+        }
+        dest.once("close", onclose);
+        function onfinish() {
+          debug("onfinish");
+          dest.removeListener("close", onclose);
+          unpipe();
+        }
+        dest.once("finish", onfinish);
+        function unpipe() {
+          debug("unpipe");
+          src.unpipe(dest);
+        }
+        dest.emit("pipe", src);
+        if (dest.writableNeedDrain === true) {
+          pause();
+        } else if (!state.flowing) {
+          debug("pipe resume");
+          src.resume();
+        }
+        return dest;
+      };
+      function pipeOnDrain(src, dest) {
+        return function pipeOnDrainFunctionResult() {
+          const state = src._readableState;
+          if (state.awaitDrainWriters === dest) {
+            debug("pipeOnDrain", 1);
+            state.awaitDrainWriters = null;
+          } else if (state.multiAwaitDrain) {
+            debug("pipeOnDrain", state.awaitDrainWriters.size);
+            state.awaitDrainWriters.delete(dest);
+          }
+          if ((!state.awaitDrainWriters || state.awaitDrainWriters.size === 0) && src.listenerCount("data")) {
+            src.resume();
+          }
+        };
+      }
+      Readable.prototype.unpipe = function(dest) {
+        const state = this._readableState;
+        const unpipeInfo = {
+          hasUnpiped: false
+        };
+        if (state.pipes.length === 0) return this;
+        if (!dest) {
+          const dests = state.pipes;
+          state.pipes = [];
+          this.pause();
+          for (let i = 0; i < dests.length; i++)
+            dests[i].emit("unpipe", this, {
+              hasUnpiped: false
+            });
+          return this;
+        }
+        const index = ArrayPrototypeIndexOf(state.pipes, dest);
+        if (index === -1) return this;
+        state.pipes.splice(index, 1);
+        if (state.pipes.length === 0) this.pause();
+        dest.emit("unpipe", this, unpipeInfo);
+        return this;
+      };
+      Readable.prototype.on = function(ev, fn) {
+        const res = Stream.prototype.on.call(this, ev, fn);
+        const state = this._readableState;
+        if (ev === "data") {
+          state.readableListening = this.listenerCount("readable") > 0;
+          if (state.flowing !== false) this.resume();
+        } else if (ev === "readable") {
+          if (!state.endEmitted && !state.readableListening) {
+            state.readableListening = state.needReadable = true;
+            state.flowing = false;
+            state.emittedReadable = false;
+            debug("on readable", state.length, state.reading);
+            if (state.length) {
+              emitReadable(this);
+            } else if (!state.reading) {
+              process3.nextTick(nReadingNextTick, this);
+            }
+          }
+        }
+        return res;
+      };
+      Readable.prototype.addListener = Readable.prototype.on;
+      Readable.prototype.removeListener = function(ev, fn) {
+        const res = Stream.prototype.removeListener.call(this, ev, fn);
+        if (ev === "readable") {
+          process3.nextTick(updateReadableListening, this);
+        }
+        return res;
+      };
+      Readable.prototype.off = Readable.prototype.removeListener;
+      Readable.prototype.removeAllListeners = function(ev) {
+        const res = Stream.prototype.removeAllListeners.apply(this, arguments);
+        if (ev === "readable" || ev === void 0) {
+          process3.nextTick(updateReadableListening, this);
+        }
+        return res;
+      };
+      function updateReadableListening(self2) {
+        const state = self2._readableState;
+        state.readableListening = self2.listenerCount("readable") > 0;
+        if (state.resumeScheduled && state[kPaused] === false) {
+          state.flowing = true;
+        } else if (self2.listenerCount("data") > 0) {
+          self2.resume();
+        } else if (!state.readableListening) {
+          state.flowing = null;
+        }
+      }
+      function nReadingNextTick(self2) {
+        debug("readable nexttick read 0");
+        self2.read(0);
+      }
+      Readable.prototype.resume = function() {
+        const state = this._readableState;
+        if (!state.flowing) {
+          debug("resume");
+          state.flowing = !state.readableListening;
+          resume(this, state);
+        }
+        state[kPaused] = false;
+        return this;
+      };
+      function resume(stream, state) {
+        if (!state.resumeScheduled) {
+          state.resumeScheduled = true;
+          process3.nextTick(resume_, stream, state);
+        }
+      }
+      function resume_(stream, state) {
+        debug("resume", state.reading);
+        if (!state.reading) {
+          stream.read(0);
+        }
+        state.resumeScheduled = false;
+        stream.emit("resume");
+        flow(stream);
+        if (state.flowing && !state.reading) stream.read(0);
+      }
+      Readable.prototype.pause = function() {
+        debug("call pause flowing=%j", this._readableState.flowing);
+        if (this._readableState.flowing !== false) {
+          debug("pause");
+          this._readableState.flowing = false;
+          this.emit("pause");
+        }
+        this._readableState[kPaused] = true;
+        return this;
+      };
+      function flow(stream) {
+        const state = stream._readableState;
+        debug("flow", state.flowing);
+        while (state.flowing && stream.read() !== null) ;
+      }
+      Readable.prototype.wrap = function(stream) {
+        let paused = false;
+        stream.on("data", (chunk) => {
+          if (!this.push(chunk) && stream.pause) {
+            paused = true;
+            stream.pause();
+          }
+        });
+        stream.on("end", () => {
+          this.push(null);
+        });
+        stream.on("error", (err) => {
+          errorOrDestroy(this, err);
+        });
+        stream.on("close", () => {
+          this.destroy();
+        });
+        stream.on("destroy", () => {
+          this.destroy();
+        });
+        this._read = () => {
+          if (paused && stream.resume) {
+            paused = false;
+            stream.resume();
+          }
+        };
+        const streamKeys = ObjectKeys(stream);
+        for (let j = 1; j < streamKeys.length; j++) {
+          const i = streamKeys[j];
+          if (this[i] === void 0 && typeof stream[i] === "function") {
+            this[i] = stream[i].bind(stream);
+          }
+        }
+        return this;
+      };
+      Readable.prototype[SymbolAsyncIterator] = function() {
+        return streamToAsyncIterator(this);
+      };
+      Readable.prototype.iterator = function(options) {
+        if (options !== void 0) {
+          validateObject(options, "options");
+        }
+        return streamToAsyncIterator(this, options);
+      };
+      function streamToAsyncIterator(stream, options) {
+        if (typeof stream.read !== "function") {
+          stream = Readable.wrap(stream, {
+            objectMode: true
+          });
+        }
+        const iter = createAsyncIterator(stream, options);
+        iter.stream = stream;
+        return iter;
+      }
+      async function* createAsyncIterator(stream, options) {
+        let callback = nop;
+        function next(resolve2) {
+          if (this === stream) {
+            callback();
+            callback = nop;
+          } else {
+            callback = resolve2;
+          }
+        }
+        stream.on("readable", next);
+        let error;
+        const cleanup = eos(
+          stream,
+          {
+            writable: false
+          },
+          (err) => {
+            error = err ? aggregateTwoErrors(error, err) : null;
+            callback();
+            callback = nop;
+          }
+        );
+        try {
+          while (true) {
+            const chunk = stream.destroyed ? null : stream.read();
+            if (chunk !== null) {
+              yield chunk;
+            } else if (error) {
+              throw error;
+            } else if (error === null) {
+              return;
+            } else {
+              await new Promise2(next);
+            }
+          }
+        } catch (err) {
+          error = aggregateTwoErrors(error, err);
+          throw error;
+        } finally {
+          if ((error || (options === null || options === void 0 ? void 0 : options.destroyOnReturn) !== false) && (error === void 0 || stream._readableState.autoDestroy)) {
+            destroyImpl.destroyer(stream, null);
+          } else {
+            stream.off("readable", next);
+            cleanup();
+          }
+        }
+      }
+      ObjectDefineProperties(Readable.prototype, {
+        readable: {
+          __proto__: null,
+          get() {
+            const r = this._readableState;
+            return !!r && r.readable !== false && !r.destroyed && !r.errorEmitted && !r.endEmitted;
+          },
+          set(val) {
+            if (this._readableState) {
+              this._readableState.readable = !!val;
+            }
+          }
+        },
+        readableDidRead: {
+          __proto__: null,
+          enumerable: false,
+          get: function() {
+            return this._readableState.dataEmitted;
+          }
+        },
+        readableAborted: {
+          __proto__: null,
+          enumerable: false,
+          get: function() {
+            return !!(this._readableState.readable !== false && (this._readableState.destroyed || this._readableState.errored) && !this._readableState.endEmitted);
+          }
+        },
+        readableHighWaterMark: {
+          __proto__: null,
+          enumerable: false,
+          get: function() {
+            return this._readableState.highWaterMark;
+          }
+        },
+        readableBuffer: {
+          __proto__: null,
+          enumerable: false,
+          get: function() {
+            return this._readableState && this._readableState.buffer;
+          }
+        },
+        readableFlowing: {
+          __proto__: null,
+          enumerable: false,
+          get: function() {
+            return this._readableState.flowing;
+          },
+          set: function(state) {
+            if (this._readableState) {
+              this._readableState.flowing = state;
+            }
+          }
+        },
+        readableLength: {
+          __proto__: null,
+          enumerable: false,
+          get() {
+            return this._readableState.length;
+          }
+        },
+        readableObjectMode: {
+          __proto__: null,
+          enumerable: false,
+          get() {
+            return this._readableState ? this._readableState.objectMode : false;
+          }
+        },
+        readableEncoding: {
+          __proto__: null,
+          enumerable: false,
+          get() {
+            return this._readableState ? this._readableState.encoding : null;
+          }
+        },
+        errored: {
+          __proto__: null,
+          enumerable: false,
+          get() {
+            return this._readableState ? this._readableState.errored : null;
+          }
+        },
+        closed: {
+          __proto__: null,
+          get() {
+            return this._readableState ? this._readableState.closed : false;
+          }
+        },
+        destroyed: {
+          __proto__: null,
+          enumerable: false,
+          get() {
+            return this._readableState ? this._readableState.destroyed : false;
+          },
+          set(value) {
+            if (!this._readableState) {
+              return;
+            }
+            this._readableState.destroyed = value;
+          }
+        },
+        readableEnded: {
+          __proto__: null,
+          enumerable: false,
+          get() {
+            return this._readableState ? this._readableState.endEmitted : false;
+          }
+        }
+      });
+      ObjectDefineProperties(ReadableState.prototype, {
+        // Legacy getter for `pipesCount`.
+        pipesCount: {
+          __proto__: null,
+          get() {
+            return this.pipes.length;
+          }
+        },
+        // Legacy property for `paused`.
+        paused: {
+          __proto__: null,
+          get() {
+            return this[kPaused] !== false;
+          },
+          set(value) {
+            this[kPaused] = !!value;
+          }
+        }
+      });
+      Readable._fromList = fromList;
+      function fromList(n, state) {
+        if (state.length === 0) return null;
+        let ret;
+        if (state.objectMode) ret = state.buffer.shift();
+        else if (!n || n >= state.length) {
+          if (state.decoder) ret = state.buffer.join("");
+          else if (state.buffer.length === 1) ret = state.buffer.first();
+          else ret = state.buffer.concat(state.length);
+          state.buffer.clear();
+        } else {
+          ret = state.buffer.consume(n, state.decoder);
+        }
+        return ret;
+      }
+      function endReadable(stream) {
+        const state = stream._readableState;
+        debug("endReadable", state.endEmitted);
+        if (!state.endEmitted) {
+          state.ended = true;
+          process3.nextTick(endReadableNT, state, stream);
+        }
+      }
+      function endReadableNT(state, stream) {
+        debug("endReadableNT", state.endEmitted, state.length);
+        if (!state.errored && !state.closeEmitted && !state.endEmitted && state.length === 0) {
+          state.endEmitted = true;
+          stream.emit("end");
+          if (stream.writable && stream.allowHalfOpen === false) {
+            process3.nextTick(endWritableNT, stream);
+          } else if (state.autoDestroy) {
+            const wState = stream._writableState;
+            const autoDestroy = !wState || wState.autoDestroy && // We don't expect the writable to ever 'finish'
+            // if writable is explicitly set to false.
+            (wState.finished || wState.writable === false);
+            if (autoDestroy) {
+              stream.destroy();
+            }
+          }
+        }
+      }
+      function endWritableNT(stream) {
+        const writable = stream.writable && !stream.writableEnded && !stream.destroyed;
+        if (writable) {
+          stream.end();
+        }
+      }
+      Readable.from = function(iterable, opts) {
+        return from(Readable, iterable, opts);
+      };
+      var webStreamsAdapters;
+      function lazyWebStreams() {
+        if (webStreamsAdapters === void 0) webStreamsAdapters = {};
+        return webStreamsAdapters;
+      }
+      Readable.fromWeb = function(readableStream, options) {
+        return lazyWebStreams().newStreamReadableFromReadableStream(readableStream, options);
+      };
+      Readable.toWeb = function(streamReadable, options) {
+        return lazyWebStreams().newReadableStreamFromStreamReadable(streamReadable, options);
+      };
+      Readable.wrap = function(src, options) {
+        var _ref, _src$readableObjectMo;
+        return new Readable({
+          objectMode: (_ref = (_src$readableObjectMo = src.readableObjectMode) !== null && _src$readableObjectMo !== void 0 ? _src$readableObjectMo : src.objectMode) !== null && _ref !== void 0 ? _ref : true,
+          ...options,
+          destroy(err, callback) {
+            destroyImpl.destroyer(src, err);
+            callback(err);
+          }
+        }).wrap(src);
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/writable.js
+  var require_writable = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/writable.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var process3 = require_browser2();
+      var {
+        ArrayPrototypeSlice,
+        Error: Error2,
+        FunctionPrototypeSymbolHasInstance,
+        ObjectDefineProperty,
+        ObjectDefineProperties,
+        ObjectSetPrototypeOf,
+        StringPrototypeToLowerCase,
+        Symbol: Symbol2,
+        SymbolHasInstance
+      } = require_primordials();
+      module.exports = Writable;
+      Writable.WritableState = WritableState;
+      var { EventEmitter: EE } = (init_events(), __toCommonJS(events_exports));
+      var Stream = require_legacy().Stream;
+      var { Buffer: Buffer3 } = (init_buffer(), __toCommonJS(buffer_exports));
+      var destroyImpl = require_destroy();
+      var { addAbortSignal } = require_add_abort_signal();
+      var { getHighWaterMark, getDefaultHighWaterMark } = require_state();
+      var {
+        ERR_INVALID_ARG_TYPE,
+        ERR_METHOD_NOT_IMPLEMENTED,
+        ERR_MULTIPLE_CALLBACK,
+        ERR_STREAM_CANNOT_PIPE,
+        ERR_STREAM_DESTROYED,
+        ERR_STREAM_ALREADY_FINISHED,
+        ERR_STREAM_NULL_VALUES,
+        ERR_STREAM_WRITE_AFTER_END,
+        ERR_UNKNOWN_ENCODING
+      } = require_errors().codes;
+      var { errorOrDestroy } = destroyImpl;
+      ObjectSetPrototypeOf(Writable.prototype, Stream.prototype);
+      ObjectSetPrototypeOf(Writable, Stream);
+      function nop() {
+      }
+      var kOnFinished = Symbol2("kOnFinished");
+      function WritableState(options, stream, isDuplex) {
+        if (typeof isDuplex !== "boolean") isDuplex = stream instanceof require_duplex();
+        this.objectMode = !!(options && options.objectMode);
+        if (isDuplex) this.objectMode = this.objectMode || !!(options && options.writableObjectMode);
+        this.highWaterMark = options ? getHighWaterMark(this, options, "writableHighWaterMark", isDuplex) : getDefaultHighWaterMark(false);
+        this.finalCalled = false;
+        this.needDrain = false;
+        this.ending = false;
+        this.ended = false;
+        this.finished = false;
+        this.destroyed = false;
+        const noDecode = !!(options && options.decodeStrings === false);
+        this.decodeStrings = !noDecode;
+        this.defaultEncoding = options && options.defaultEncoding || "utf8";
+        this.length = 0;
+        this.writing = false;
+        this.corked = 0;
+        this.sync = true;
+        this.bufferProcessing = false;
+        this.onwrite = onwrite.bind(void 0, stream);
+        this.writecb = null;
+        this.writelen = 0;
+        this.afterWriteTickInfo = null;
+        resetBuffer(this);
+        this.pendingcb = 0;
+        this.constructed = true;
+        this.prefinished = false;
+        this.errorEmitted = false;
+        this.emitClose = !options || options.emitClose !== false;
+        this.autoDestroy = !options || options.autoDestroy !== false;
+        this.errored = null;
+        this.closed = false;
+        this.closeEmitted = false;
+        this[kOnFinished] = [];
+      }
+      function resetBuffer(state) {
+        state.buffered = [];
+        state.bufferedIndex = 0;
+        state.allBuffers = true;
+        state.allNoop = true;
+      }
+      WritableState.prototype.getBuffer = function getBuffer() {
+        return ArrayPrototypeSlice(this.buffered, this.bufferedIndex);
+      };
+      ObjectDefineProperty(WritableState.prototype, "bufferedRequestCount", {
+        __proto__: null,
+        get() {
+          return this.buffered.length - this.bufferedIndex;
+        }
+      });
+      function Writable(options) {
+        const isDuplex = this instanceof require_duplex();
+        if (!isDuplex && !FunctionPrototypeSymbolHasInstance(Writable, this)) return new Writable(options);
+        this._writableState = new WritableState(options, this, isDuplex);
+        if (options) {
+          if (typeof options.write === "function") this._write = options.write;
+          if (typeof options.writev === "function") this._writev = options.writev;
+          if (typeof options.destroy === "function") this._destroy = options.destroy;
+          if (typeof options.final === "function") this._final = options.final;
+          if (typeof options.construct === "function") this._construct = options.construct;
+          if (options.signal) addAbortSignal(options.signal, this);
+        }
+        Stream.call(this, options);
+        destroyImpl.construct(this, () => {
+          const state = this._writableState;
+          if (!state.writing) {
+            clearBuffer(this, state);
+          }
+          finishMaybe(this, state);
+        });
+      }
+      ObjectDefineProperty(Writable, SymbolHasInstance, {
+        __proto__: null,
+        value: function(object) {
+          if (FunctionPrototypeSymbolHasInstance(this, object)) return true;
+          if (this !== Writable) return false;
+          return object && object._writableState instanceof WritableState;
+        }
+      });
+      Writable.prototype.pipe = function() {
+        errorOrDestroy(this, new ERR_STREAM_CANNOT_PIPE());
+      };
+      function _write(stream, chunk, encoding, cb) {
+        const state = stream._writableState;
+        if (typeof encoding === "function") {
+          cb = encoding;
+          encoding = state.defaultEncoding;
+        } else {
+          if (!encoding) encoding = state.defaultEncoding;
+          else if (encoding !== "buffer" && !Buffer3.isEncoding(encoding)) throw new ERR_UNKNOWN_ENCODING(encoding);
+          if (typeof cb !== "function") cb = nop;
+        }
+        if (chunk === null) {
+          throw new ERR_STREAM_NULL_VALUES();
+        } else if (!state.objectMode) {
+          if (typeof chunk === "string") {
+            if (state.decodeStrings !== false) {
+              chunk = Buffer3.from(chunk, encoding);
+              encoding = "buffer";
+            }
+          } else if (chunk instanceof Buffer3) {
+            encoding = "buffer";
+          } else if (Stream._isUint8Array(chunk)) {
+            chunk = Stream._uint8ArrayToBuffer(chunk);
+            encoding = "buffer";
+          } else {
+            throw new ERR_INVALID_ARG_TYPE("chunk", ["string", "Buffer", "Uint8Array"], chunk);
+          }
+        }
+        let err;
+        if (state.ending) {
+          err = new ERR_STREAM_WRITE_AFTER_END();
+        } else if (state.destroyed) {
+          err = new ERR_STREAM_DESTROYED("write");
+        }
+        if (err) {
+          process3.nextTick(cb, err);
+          errorOrDestroy(stream, err, true);
+          return err;
+        }
+        state.pendingcb++;
+        return writeOrBuffer(stream, state, chunk, encoding, cb);
+      }
+      Writable.prototype.write = function(chunk, encoding, cb) {
+        return _write(this, chunk, encoding, cb) === true;
+      };
+      Writable.prototype.cork = function() {
+        this._writableState.corked++;
+      };
+      Writable.prototype.uncork = function() {
+        const state = this._writableState;
+        if (state.corked) {
+          state.corked--;
+          if (!state.writing) clearBuffer(this, state);
+        }
+      };
+      Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
+        if (typeof encoding === "string") encoding = StringPrototypeToLowerCase(encoding);
+        if (!Buffer3.isEncoding(encoding)) throw new ERR_UNKNOWN_ENCODING(encoding);
+        this._writableState.defaultEncoding = encoding;
+        return this;
+      };
+      function writeOrBuffer(stream, state, chunk, encoding, callback) {
+        const len = state.objectMode ? 1 : chunk.length;
+        state.length += len;
+        const ret = state.length < state.highWaterMark;
+        if (!ret) state.needDrain = true;
+        if (state.writing || state.corked || state.errored || !state.constructed) {
+          state.buffered.push({
+            chunk,
+            encoding,
+            callback
+          });
+          if (state.allBuffers && encoding !== "buffer") {
+            state.allBuffers = false;
+          }
+          if (state.allNoop && callback !== nop) {
+            state.allNoop = false;
+          }
+        } else {
+          state.writelen = len;
+          state.writecb = callback;
+          state.writing = true;
+          state.sync = true;
+          stream._write(chunk, encoding, state.onwrite);
+          state.sync = false;
+        }
+        return ret && !state.errored && !state.destroyed;
+      }
+      function doWrite(stream, state, writev, len, chunk, encoding, cb) {
+        state.writelen = len;
+        state.writecb = cb;
+        state.writing = true;
+        state.sync = true;
+        if (state.destroyed) state.onwrite(new ERR_STREAM_DESTROYED("write"));
+        else if (writev) stream._writev(chunk, state.onwrite);
+        else stream._write(chunk, encoding, state.onwrite);
+        state.sync = false;
+      }
+      function onwriteError(stream, state, er, cb) {
+        --state.pendingcb;
+        cb(er);
+        errorBuffer(state);
+        errorOrDestroy(stream, er);
+      }
+      function onwrite(stream, er) {
+        const state = stream._writableState;
+        const sync = state.sync;
+        const cb = state.writecb;
+        if (typeof cb !== "function") {
+          errorOrDestroy(stream, new ERR_MULTIPLE_CALLBACK());
+          return;
+        }
+        state.writing = false;
+        state.writecb = null;
+        state.length -= state.writelen;
+        state.writelen = 0;
+        if (er) {
+          er.stack;
+          if (!state.errored) {
+            state.errored = er;
+          }
+          if (stream._readableState && !stream._readableState.errored) {
+            stream._readableState.errored = er;
+          }
+          if (sync) {
+            process3.nextTick(onwriteError, stream, state, er, cb);
+          } else {
+            onwriteError(stream, state, er, cb);
+          }
+        } else {
+          if (state.buffered.length > state.bufferedIndex) {
+            clearBuffer(stream, state);
+          }
+          if (sync) {
+            if (state.afterWriteTickInfo !== null && state.afterWriteTickInfo.cb === cb) {
+              state.afterWriteTickInfo.count++;
+            } else {
+              state.afterWriteTickInfo = {
+                count: 1,
+                cb,
+                stream,
+                state
+              };
+              process3.nextTick(afterWriteTick, state.afterWriteTickInfo);
+            }
+          } else {
+            afterWrite(stream, state, 1, cb);
+          }
+        }
+      }
+      function afterWriteTick({ stream, state, count, cb }) {
+        state.afterWriteTickInfo = null;
+        return afterWrite(stream, state, count, cb);
+      }
+      function afterWrite(stream, state, count, cb) {
+        const needDrain = !state.ending && !stream.destroyed && state.length === 0 && state.needDrain;
+        if (needDrain) {
+          state.needDrain = false;
+          stream.emit("drain");
+        }
+        while (count-- > 0) {
+          state.pendingcb--;
+          cb();
+        }
+        if (state.destroyed) {
+          errorBuffer(state);
+        }
+        finishMaybe(stream, state);
+      }
+      function errorBuffer(state) {
+        if (state.writing) {
+          return;
+        }
+        for (let n = state.bufferedIndex; n < state.buffered.length; ++n) {
+          var _state$errored;
+          const { chunk, callback } = state.buffered[n];
+          const len = state.objectMode ? 1 : chunk.length;
+          state.length -= len;
+          callback(
+            (_state$errored = state.errored) !== null && _state$errored !== void 0 ? _state$errored : new ERR_STREAM_DESTROYED("write")
+          );
+        }
+        const onfinishCallbacks = state[kOnFinished].splice(0);
+        for (let i = 0; i < onfinishCallbacks.length; i++) {
+          var _state$errored2;
+          onfinishCallbacks[i](
+            (_state$errored2 = state.errored) !== null && _state$errored2 !== void 0 ? _state$errored2 : new ERR_STREAM_DESTROYED("end")
+          );
+        }
+        resetBuffer(state);
+      }
+      function clearBuffer(stream, state) {
+        if (state.corked || state.bufferProcessing || state.destroyed || !state.constructed) {
+          return;
+        }
+        const { buffered, bufferedIndex, objectMode } = state;
+        const bufferedLength = buffered.length - bufferedIndex;
+        if (!bufferedLength) {
+          return;
+        }
+        let i = bufferedIndex;
+        state.bufferProcessing = true;
+        if (bufferedLength > 1 && stream._writev) {
+          state.pendingcb -= bufferedLength - 1;
+          const callback = state.allNoop ? nop : (err) => {
+            for (let n = i; n < buffered.length; ++n) {
+              buffered[n].callback(err);
+            }
+          };
+          const chunks = state.allNoop && i === 0 ? buffered : ArrayPrototypeSlice(buffered, i);
+          chunks.allBuffers = state.allBuffers;
+          doWrite(stream, state, true, state.length, chunks, "", callback);
+          resetBuffer(state);
+        } else {
+          do {
+            const { chunk, encoding, callback } = buffered[i];
+            buffered[i++] = null;
+            const len = objectMode ? 1 : chunk.length;
+            doWrite(stream, state, false, len, chunk, encoding, callback);
+          } while (i < buffered.length && !state.writing);
+          if (i === buffered.length) {
+            resetBuffer(state);
+          } else if (i > 256) {
+            buffered.splice(0, i);
+            state.bufferedIndex = 0;
+          } else {
+            state.bufferedIndex = i;
+          }
+        }
+        state.bufferProcessing = false;
+      }
+      Writable.prototype._write = function(chunk, encoding, cb) {
+        if (this._writev) {
+          this._writev(
+            [
+              {
+                chunk,
+                encoding
+              }
+            ],
+            cb
+          );
+        } else {
+          throw new ERR_METHOD_NOT_IMPLEMENTED("_write()");
+        }
+      };
+      Writable.prototype._writev = null;
+      Writable.prototype.end = function(chunk, encoding, cb) {
+        const state = this._writableState;
+        if (typeof chunk === "function") {
+          cb = chunk;
+          chunk = null;
+          encoding = null;
+        } else if (typeof encoding === "function") {
+          cb = encoding;
+          encoding = null;
+        }
+        let err;
+        if (chunk !== null && chunk !== void 0) {
+          const ret = _write(this, chunk, encoding);
+          if (ret instanceof Error2) {
+            err = ret;
+          }
+        }
+        if (state.corked) {
+          state.corked = 1;
+          this.uncork();
+        }
+        if (err) {
+        } else if (!state.errored && !state.ending) {
+          state.ending = true;
+          finishMaybe(this, state, true);
+          state.ended = true;
+        } else if (state.finished) {
+          err = new ERR_STREAM_ALREADY_FINISHED("end");
+        } else if (state.destroyed) {
+          err = new ERR_STREAM_DESTROYED("end");
+        }
+        if (typeof cb === "function") {
+          if (err || state.finished) {
+            process3.nextTick(cb, err);
+          } else {
+            state[kOnFinished].push(cb);
+          }
+        }
+        return this;
+      };
+      function needFinish(state) {
+        return state.ending && !state.destroyed && state.constructed && state.length === 0 && !state.errored && state.buffered.length === 0 && !state.finished && !state.writing && !state.errorEmitted && !state.closeEmitted;
+      }
+      function callFinal(stream, state) {
+        let called = false;
+        function onFinish(err) {
+          if (called) {
+            errorOrDestroy(stream, err !== null && err !== void 0 ? err : ERR_MULTIPLE_CALLBACK());
+            return;
+          }
+          called = true;
+          state.pendingcb--;
+          if (err) {
+            const onfinishCallbacks = state[kOnFinished].splice(0);
+            for (let i = 0; i < onfinishCallbacks.length; i++) {
+              onfinishCallbacks[i](err);
+            }
+            errorOrDestroy(stream, err, state.sync);
+          } else if (needFinish(state)) {
+            state.prefinished = true;
+            stream.emit("prefinish");
+            state.pendingcb++;
+            process3.nextTick(finish, stream, state);
+          }
+        }
+        state.sync = true;
+        state.pendingcb++;
+        try {
+          stream._final(onFinish);
+        } catch (err) {
+          onFinish(err);
+        }
+        state.sync = false;
+      }
+      function prefinish(stream, state) {
+        if (!state.prefinished && !state.finalCalled) {
+          if (typeof stream._final === "function" && !state.destroyed) {
+            state.finalCalled = true;
+            callFinal(stream, state);
+          } else {
+            state.prefinished = true;
+            stream.emit("prefinish");
+          }
+        }
+      }
+      function finishMaybe(stream, state, sync) {
+        if (needFinish(state)) {
+          prefinish(stream, state);
+          if (state.pendingcb === 0) {
+            if (sync) {
+              state.pendingcb++;
+              process3.nextTick(
+                (stream2, state2) => {
+                  if (needFinish(state2)) {
+                    finish(stream2, state2);
+                  } else {
+                    state2.pendingcb--;
+                  }
+                },
+                stream,
+                state
+              );
+            } else if (needFinish(state)) {
+              state.pendingcb++;
+              finish(stream, state);
+            }
+          }
+        }
+      }
+      function finish(stream, state) {
+        state.pendingcb--;
+        state.finished = true;
+        const onfinishCallbacks = state[kOnFinished].splice(0);
+        for (let i = 0; i < onfinishCallbacks.length; i++) {
+          onfinishCallbacks[i]();
+        }
+        stream.emit("finish");
+        if (state.autoDestroy) {
+          const rState = stream._readableState;
+          const autoDestroy = !rState || rState.autoDestroy && // We don't expect the readable to ever 'end'
+          // if readable is explicitly set to false.
+          (rState.endEmitted || rState.readable === false);
+          if (autoDestroy) {
+            stream.destroy();
+          }
+        }
+      }
+      ObjectDefineProperties(Writable.prototype, {
+        closed: {
+          __proto__: null,
+          get() {
+            return this._writableState ? this._writableState.closed : false;
+          }
+        },
+        destroyed: {
+          __proto__: null,
+          get() {
+            return this._writableState ? this._writableState.destroyed : false;
+          },
+          set(value) {
+            if (this._writableState) {
+              this._writableState.destroyed = value;
+            }
+          }
+        },
+        writable: {
+          __proto__: null,
+          get() {
+            const w = this._writableState;
+            return !!w && w.writable !== false && !w.destroyed && !w.errored && !w.ending && !w.ended;
+          },
+          set(val) {
+            if (this._writableState) {
+              this._writableState.writable = !!val;
+            }
+          }
+        },
+        writableFinished: {
+          __proto__: null,
+          get() {
+            return this._writableState ? this._writableState.finished : false;
+          }
+        },
+        writableObjectMode: {
+          __proto__: null,
+          get() {
+            return this._writableState ? this._writableState.objectMode : false;
+          }
+        },
+        writableBuffer: {
+          __proto__: null,
+          get() {
+            return this._writableState && this._writableState.getBuffer();
+          }
+        },
+        writableEnded: {
+          __proto__: null,
+          get() {
+            return this._writableState ? this._writableState.ending : false;
+          }
+        },
+        writableNeedDrain: {
+          __proto__: null,
+          get() {
+            const wState = this._writableState;
+            if (!wState) return false;
+            return !wState.destroyed && !wState.ending && wState.needDrain;
+          }
+        },
+        writableHighWaterMark: {
+          __proto__: null,
+          get() {
+            return this._writableState && this._writableState.highWaterMark;
+          }
+        },
+        writableCorked: {
+          __proto__: null,
+          get() {
+            return this._writableState ? this._writableState.corked : 0;
+          }
+        },
+        writableLength: {
+          __proto__: null,
+          get() {
+            return this._writableState && this._writableState.length;
+          }
+        },
+        errored: {
+          __proto__: null,
+          enumerable: false,
+          get() {
+            return this._writableState ? this._writableState.errored : null;
+          }
+        },
+        writableAborted: {
+          __proto__: null,
+          enumerable: false,
+          get: function() {
+            return !!(this._writableState.writable !== false && (this._writableState.destroyed || this._writableState.errored) && !this._writableState.finished);
+          }
+        }
+      });
+      var destroy = destroyImpl.destroy;
+      Writable.prototype.destroy = function(err, cb) {
+        const state = this._writableState;
+        if (!state.destroyed && (state.bufferedIndex < state.buffered.length || state[kOnFinished].length)) {
+          process3.nextTick(errorBuffer, state);
+        }
+        destroy.call(this, err, cb);
+        return this;
+      };
+      Writable.prototype._undestroy = destroyImpl.undestroy;
+      Writable.prototype._destroy = function(err, cb) {
+        cb(err);
+      };
+      Writable.prototype[EE.captureRejectionSymbol] = function(err) {
+        this.destroy(err);
+      };
+      var webStreamsAdapters;
+      function lazyWebStreams() {
+        if (webStreamsAdapters === void 0) webStreamsAdapters = {};
+        return webStreamsAdapters;
+      }
+      Writable.fromWeb = function(writableStream, options) {
+        return lazyWebStreams().newStreamWritableFromWritableStream(writableStream, options);
+      };
+      Writable.toWeb = function(streamWritable) {
+        return lazyWebStreams().newWritableStreamFromStreamWritable(streamWritable);
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/duplexify.js
+  var require_duplexify = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/duplexify.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var process3 = require_browser2();
+      var bufferModule = (init_buffer(), __toCommonJS(buffer_exports));
+      var {
+        isReadable,
+        isWritable,
+        isIterable,
+        isNodeStream,
+        isReadableNodeStream,
+        isWritableNodeStream,
+        isDuplexNodeStream,
+        isReadableStream,
+        isWritableStream
+      } = require_utils();
+      var eos = require_end_of_stream();
+      var {
+        AbortError,
+        codes: { ERR_INVALID_ARG_TYPE, ERR_INVALID_RETURN_VALUE }
+      } = require_errors();
+      var { destroyer } = require_destroy();
+      var Duplex = require_duplex();
+      var Readable = require_readable();
+      var Writable = require_writable();
+      var { createDeferredPromise } = require_util();
+      var from = require_from();
+      var Blob2 = globalThis.Blob || bufferModule.Blob;
+      var isBlob = typeof Blob2 !== "undefined" ? function isBlob2(b) {
+        return b instanceof Blob2;
+      } : function isBlob2(b) {
+        return false;
+      };
+      var AbortController = globalThis.AbortController || require_browser().AbortController;
+      var { FunctionPrototypeCall } = require_primordials();
+      var Duplexify = class extends Duplex {
+        constructor(options) {
+          super(options);
+          if ((options === null || options === void 0 ? void 0 : options.readable) === false) {
+            this._readableState.readable = false;
+            this._readableState.ended = true;
+            this._readableState.endEmitted = true;
+          }
+          if ((options === null || options === void 0 ? void 0 : options.writable) === false) {
+            this._writableState.writable = false;
+            this._writableState.ending = true;
+            this._writableState.ended = true;
+            this._writableState.finished = true;
+          }
+        }
+      };
+      module.exports = function duplexify(body, name2) {
+        if (isDuplexNodeStream(body)) {
+          return body;
+        }
+        if (isReadableNodeStream(body)) {
+          return _duplexify({
+            readable: body
+          });
+        }
+        if (isWritableNodeStream(body)) {
+          return _duplexify({
+            writable: body
+          });
+        }
+        if (isNodeStream(body)) {
+          return _duplexify({
+            writable: false,
+            readable: false
+          });
+        }
+        if (isReadableStream(body)) {
+          return _duplexify({
+            readable: Readable.fromWeb(body)
+          });
+        }
+        if (isWritableStream(body)) {
+          return _duplexify({
+            writable: Writable.fromWeb(body)
+          });
+        }
+        if (typeof body === "function") {
+          const { value, write, final, destroy } = fromAsyncGen(body);
+          if (isIterable(value)) {
+            return from(Duplexify, value, {
+              // TODO (ronag): highWaterMark?
+              objectMode: true,
+              write,
+              final,
+              destroy
+            });
+          }
+          const then2 = value === null || value === void 0 ? void 0 : value.then;
+          if (typeof then2 === "function") {
+            let d;
+            const promise = FunctionPrototypeCall(
+              then2,
+              value,
+              (val) => {
+                if (val != null) {
+                  throw new ERR_INVALID_RETURN_VALUE("nully", "body", val);
+                }
+              },
+              (err) => {
+                destroyer(d, err);
+              }
+            );
+            return d = new Duplexify({
+              // TODO (ronag): highWaterMark?
+              objectMode: true,
+              readable: false,
+              write,
+              final(cb) {
+                final(async () => {
+                  try {
+                    await promise;
+                    process3.nextTick(cb, null);
+                  } catch (err) {
+                    process3.nextTick(cb, err);
+                  }
+                });
+              },
+              destroy
+            });
+          }
+          throw new ERR_INVALID_RETURN_VALUE("Iterable, AsyncIterable or AsyncFunction", name2, value);
+        }
+        if (isBlob(body)) {
+          return duplexify(body.arrayBuffer());
+        }
+        if (isIterable(body)) {
+          return from(Duplexify, body, {
+            // TODO (ronag): highWaterMark?
+            objectMode: true,
+            writable: false
+          });
+        }
+        if (isReadableStream(body === null || body === void 0 ? void 0 : body.readable) && isWritableStream(body === null || body === void 0 ? void 0 : body.writable)) {
+          return Duplexify.fromWeb(body);
+        }
+        if (typeof (body === null || body === void 0 ? void 0 : body.writable) === "object" || typeof (body === null || body === void 0 ? void 0 : body.readable) === "object") {
+          const readable = body !== null && body !== void 0 && body.readable ? isReadableNodeStream(body === null || body === void 0 ? void 0 : body.readable) ? body === null || body === void 0 ? void 0 : body.readable : duplexify(body.readable) : void 0;
+          const writable = body !== null && body !== void 0 && body.writable ? isWritableNodeStream(body === null || body === void 0 ? void 0 : body.writable) ? body === null || body === void 0 ? void 0 : body.writable : duplexify(body.writable) : void 0;
+          return _duplexify({
+            readable,
+            writable
+          });
+        }
+        const then = body === null || body === void 0 ? void 0 : body.then;
+        if (typeof then === "function") {
+          let d;
+          FunctionPrototypeCall(
+            then,
+            body,
+            (val) => {
+              if (val != null) {
+                d.push(val);
+              }
+              d.push(null);
+            },
+            (err) => {
+              destroyer(d, err);
+            }
+          );
+          return d = new Duplexify({
+            objectMode: true,
+            writable: false,
+            read() {
+            }
+          });
+        }
+        throw new ERR_INVALID_ARG_TYPE(
+          name2,
+          [
+            "Blob",
+            "ReadableStream",
+            "WritableStream",
+            "Stream",
+            "Iterable",
+            "AsyncIterable",
+            "Function",
+            "{ readable, writable } pair",
+            "Promise"
+          ],
+          body
+        );
+      };
+      function fromAsyncGen(fn) {
+        let { promise, resolve: resolve2 } = createDeferredPromise();
+        const ac = new AbortController();
+        const signal = ac.signal;
+        const value = fn(
+          (async function* () {
+            while (true) {
+              const _promise = promise;
+              promise = null;
+              const { chunk, done, cb } = await _promise;
+              process3.nextTick(cb);
+              if (done) return;
+              if (signal.aborted)
+                throw new AbortError(void 0, {
+                  cause: signal.reason
+                });
+              ({ promise, resolve: resolve2 } = createDeferredPromise());
+              yield chunk;
+            }
+          })(),
+          {
+            signal
+          }
+        );
+        return {
+          value,
+          write(chunk, encoding, cb) {
+            const _resolve = resolve2;
+            resolve2 = null;
+            _resolve({
+              chunk,
+              done: false,
+              cb
+            });
+          },
+          final(cb) {
+            const _resolve = resolve2;
+            resolve2 = null;
+            _resolve({
+              done: true,
+              cb
+            });
+          },
+          destroy(err, cb) {
+            ac.abort();
+            cb(err);
+          }
+        };
+      }
+      function _duplexify(pair) {
+        const r = pair.readable && typeof pair.readable.read !== "function" ? Readable.wrap(pair.readable) : pair.readable;
+        const w = pair.writable;
+        let readable = !!isReadable(r);
+        let writable = !!isWritable(w);
+        let ondrain;
+        let onfinish;
+        let onreadable;
+        let onclose;
+        let d;
+        function onfinished(err) {
+          const cb = onclose;
+          onclose = null;
+          if (cb) {
+            cb(err);
+          } else if (err) {
+            d.destroy(err);
+          }
+        }
+        d = new Duplexify({
+          // TODO (ronag): highWaterMark?
+          readableObjectMode: !!(r !== null && r !== void 0 && r.readableObjectMode),
+          writableObjectMode: !!(w !== null && w !== void 0 && w.writableObjectMode),
+          readable,
+          writable
+        });
+        if (writable) {
+          eos(w, (err) => {
+            writable = false;
+            if (err) {
+              destroyer(r, err);
+            }
+            onfinished(err);
+          });
+          d._write = function(chunk, encoding, callback) {
+            if (w.write(chunk, encoding)) {
+              callback();
+            } else {
+              ondrain = callback;
+            }
+          };
+          d._final = function(callback) {
+            w.end();
+            onfinish = callback;
+          };
+          w.on("drain", function() {
+            if (ondrain) {
+              const cb = ondrain;
+              ondrain = null;
+              cb();
+            }
+          });
+          w.on("finish", function() {
+            if (onfinish) {
+              const cb = onfinish;
+              onfinish = null;
+              cb();
+            }
+          });
+        }
+        if (readable) {
+          eos(r, (err) => {
+            readable = false;
+            if (err) {
+              destroyer(r, err);
+            }
+            onfinished(err);
+          });
+          r.on("readable", function() {
+            if (onreadable) {
+              const cb = onreadable;
+              onreadable = null;
+              cb();
+            }
+          });
+          r.on("end", function() {
+            d.push(null);
+          });
+          d._read = function() {
+            while (true) {
+              const buf = r.read();
+              if (buf === null) {
+                onreadable = d._read;
+                return;
+              }
+              if (!d.push(buf)) {
+                return;
+              }
+            }
+          };
+        }
+        d._destroy = function(err, callback) {
+          if (!err && onclose !== null) {
+            err = new AbortError();
+          }
+          onreadable = null;
+          ondrain = null;
+          onfinish = null;
+          if (onclose === null) {
+            callback(err);
+          } else {
+            onclose = callback;
+            destroyer(w, err);
+            destroyer(r, err);
+          }
+        };
+        return d;
+      }
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/duplex.js
+  var require_duplex = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/duplex.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var {
+        ObjectDefineProperties,
+        ObjectGetOwnPropertyDescriptor,
+        ObjectKeys,
+        ObjectSetPrototypeOf
+      } = require_primordials();
+      module.exports = Duplex;
+      var Readable = require_readable();
+      var Writable = require_writable();
+      ObjectSetPrototypeOf(Duplex.prototype, Readable.prototype);
+      ObjectSetPrototypeOf(Duplex, Readable);
+      {
+        const keys = ObjectKeys(Writable.prototype);
+        for (let i = 0; i < keys.length; i++) {
+          const method = keys[i];
+          if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
+        }
+      }
+      function Duplex(options) {
+        if (!(this instanceof Duplex)) return new Duplex(options);
+        Readable.call(this, options);
+        Writable.call(this, options);
+        if (options) {
+          this.allowHalfOpen = options.allowHalfOpen !== false;
+          if (options.readable === false) {
+            this._readableState.readable = false;
+            this._readableState.ended = true;
+            this._readableState.endEmitted = true;
+          }
+          if (options.writable === false) {
+            this._writableState.writable = false;
+            this._writableState.ending = true;
+            this._writableState.ended = true;
+            this._writableState.finished = true;
+          }
+        } else {
+          this.allowHalfOpen = true;
+        }
+      }
+      ObjectDefineProperties(Duplex.prototype, {
+        writable: {
+          __proto__: null,
+          ...ObjectGetOwnPropertyDescriptor(Writable.prototype, "writable")
+        },
+        writableHighWaterMark: {
+          __proto__: null,
+          ...ObjectGetOwnPropertyDescriptor(Writable.prototype, "writableHighWaterMark")
+        },
+        writableObjectMode: {
+          __proto__: null,
+          ...ObjectGetOwnPropertyDescriptor(Writable.prototype, "writableObjectMode")
+        },
+        writableBuffer: {
+          __proto__: null,
+          ...ObjectGetOwnPropertyDescriptor(Writable.prototype, "writableBuffer")
+        },
+        writableLength: {
+          __proto__: null,
+          ...ObjectGetOwnPropertyDescriptor(Writable.prototype, "writableLength")
+        },
+        writableFinished: {
+          __proto__: null,
+          ...ObjectGetOwnPropertyDescriptor(Writable.prototype, "writableFinished")
+        },
+        writableCorked: {
+          __proto__: null,
+          ...ObjectGetOwnPropertyDescriptor(Writable.prototype, "writableCorked")
+        },
+        writableEnded: {
+          __proto__: null,
+          ...ObjectGetOwnPropertyDescriptor(Writable.prototype, "writableEnded")
+        },
+        writableNeedDrain: {
+          __proto__: null,
+          ...ObjectGetOwnPropertyDescriptor(Writable.prototype, "writableNeedDrain")
+        },
+        destroyed: {
+          __proto__: null,
+          get() {
+            if (this._readableState === void 0 || this._writableState === void 0) {
+              return false;
+            }
+            return this._readableState.destroyed && this._writableState.destroyed;
+          },
+          set(value) {
+            if (this._readableState && this._writableState) {
+              this._readableState.destroyed = value;
+              this._writableState.destroyed = value;
+            }
+          }
+        }
+      });
+      var webStreamsAdapters;
+      function lazyWebStreams() {
+        if (webStreamsAdapters === void 0) webStreamsAdapters = {};
+        return webStreamsAdapters;
+      }
+      Duplex.fromWeb = function(pair, options) {
+        return lazyWebStreams().newStreamDuplexFromReadableWritablePair(pair, options);
+      };
+      Duplex.toWeb = function(duplex) {
+        return lazyWebStreams().newReadableWritablePairFromDuplex(duplex);
+      };
+      var duplexify;
+      Duplex.from = function(body) {
+        if (!duplexify) {
+          duplexify = require_duplexify();
+        }
+        return duplexify(body, "body");
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/transform.js
+  var require_transform = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/transform.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { ObjectSetPrototypeOf, Symbol: Symbol2 } = require_primordials();
+      module.exports = Transform;
+      var { ERR_METHOD_NOT_IMPLEMENTED } = require_errors().codes;
+      var Duplex = require_duplex();
+      var { getHighWaterMark } = require_state();
+      ObjectSetPrototypeOf(Transform.prototype, Duplex.prototype);
+      ObjectSetPrototypeOf(Transform, Duplex);
+      var kCallback = Symbol2("kCallback");
+      function Transform(options) {
+        if (!(this instanceof Transform)) return new Transform(options);
+        const readableHighWaterMark = options ? getHighWaterMark(this, options, "readableHighWaterMark", true) : null;
+        if (readableHighWaterMark === 0) {
+          options = {
+            ...options,
+            highWaterMark: null,
+            readableHighWaterMark,
+            // TODO (ronag): 0 is not optimal since we have
+            // a "bug" where we check needDrain before calling _write and not after.
+            // Refs: https://github.com/nodejs/node/pull/32887
+            // Refs: https://github.com/nodejs/node/pull/35941
+            writableHighWaterMark: options.writableHighWaterMark || 0
+          };
+        }
+        Duplex.call(this, options);
+        this._readableState.sync = false;
+        this[kCallback] = null;
+        if (options) {
+          if (typeof options.transform === "function") this._transform = options.transform;
+          if (typeof options.flush === "function") this._flush = options.flush;
+        }
+        this.on("prefinish", prefinish);
+      }
+      function final(cb) {
+        if (typeof this._flush === "function" && !this.destroyed) {
+          this._flush((er, data) => {
+            if (er) {
+              if (cb) {
+                cb(er);
+              } else {
+                this.destroy(er);
+              }
+              return;
+            }
+            if (data != null) {
+              this.push(data);
+            }
+            this.push(null);
+            if (cb) {
+              cb();
+            }
+          });
+        } else {
+          this.push(null);
+          if (cb) {
+            cb();
+          }
+        }
+      }
+      function prefinish() {
+        if (this._final !== final) {
+          final.call(this);
+        }
+      }
+      Transform.prototype._final = final;
+      Transform.prototype._transform = function(chunk, encoding, callback) {
+        throw new ERR_METHOD_NOT_IMPLEMENTED("_transform()");
+      };
+      Transform.prototype._write = function(chunk, encoding, callback) {
+        const rState = this._readableState;
+        const wState = this._writableState;
+        const length = rState.length;
+        this._transform(chunk, encoding, (err, val) => {
+          if (err) {
+            callback(err);
+            return;
+          }
+          if (val != null) {
+            this.push(val);
+          }
+          if (wState.ended || // Backwards compat.
+          length === rState.length || // Backwards compat.
+          rState.length < rState.highWaterMark) {
+            callback();
+          } else {
+            this[kCallback] = callback;
+          }
+        });
+      };
+      Transform.prototype._read = function() {
+        if (this[kCallback]) {
+          const callback = this[kCallback];
+          this[kCallback] = null;
+          callback();
+        }
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/passthrough.js
+  var require_passthrough = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/passthrough.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { ObjectSetPrototypeOf } = require_primordials();
+      module.exports = PassThrough;
+      var Transform = require_transform();
+      ObjectSetPrototypeOf(PassThrough.prototype, Transform.prototype);
+      ObjectSetPrototypeOf(PassThrough, Transform);
+      function PassThrough(options) {
+        if (!(this instanceof PassThrough)) return new PassThrough(options);
+        Transform.call(this, options);
+      }
+      PassThrough.prototype._transform = function(chunk, encoding, cb) {
+        cb(null, chunk);
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/pipeline.js
+  var require_pipeline = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/pipeline.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var process3 = require_browser2();
+      var { ArrayIsArray, Promise: Promise2, SymbolAsyncIterator, SymbolDispose } = require_primordials();
+      var eos = require_end_of_stream();
+      var { once: once4 } = require_util();
+      var destroyImpl = require_destroy();
+      var Duplex = require_duplex();
+      var {
+        aggregateTwoErrors,
+        codes: {
+          ERR_INVALID_ARG_TYPE,
+          ERR_INVALID_RETURN_VALUE,
+          ERR_MISSING_ARGS,
+          ERR_STREAM_DESTROYED,
+          ERR_STREAM_PREMATURE_CLOSE
+        },
+        AbortError
+      } = require_errors();
+      var { validateFunction, validateAbortSignal } = require_validators();
+      var {
+        isIterable,
+        isReadable,
+        isReadableNodeStream,
+        isNodeStream,
+        isTransformStream,
+        isWebStream,
+        isReadableStream,
+        isReadableFinished
+      } = require_utils();
+      var AbortController = globalThis.AbortController || require_browser().AbortController;
+      var PassThrough;
+      var Readable;
+      var addAbortListener;
+      function destroyer(stream, reading, writing) {
+        let finished = false;
+        stream.on("close", () => {
+          finished = true;
+        });
+        const cleanup = eos(
+          stream,
+          {
+            readable: reading,
+            writable: writing
+          },
+          (err) => {
+            finished = !err;
+          }
+        );
+        return {
+          destroy: (err) => {
+            if (finished) return;
+            finished = true;
+            destroyImpl.destroyer(stream, err || new ERR_STREAM_DESTROYED("pipe"));
+          },
+          cleanup
+        };
+      }
+      function popCallback(streams) {
+        validateFunction(streams[streams.length - 1], "streams[stream.length - 1]");
+        return streams.pop();
+      }
+      function makeAsyncIterable(val) {
+        if (isIterable(val)) {
+          return val;
+        } else if (isReadableNodeStream(val)) {
+          return fromReadable(val);
+        }
+        throw new ERR_INVALID_ARG_TYPE("val", ["Readable", "Iterable", "AsyncIterable"], val);
+      }
+      async function* fromReadable(val) {
+        if (!Readable) {
+          Readable = require_readable();
+        }
+        yield* Readable.prototype[SymbolAsyncIterator].call(val);
+      }
+      async function pumpToNode(iterable, writable, finish, { end }) {
+        let error;
+        let onresolve = null;
+        const resume = (err) => {
+          if (err) {
+            error = err;
+          }
+          if (onresolve) {
+            const callback = onresolve;
+            onresolve = null;
+            callback();
+          }
+        };
+        const wait = () => new Promise2((resolve2, reject) => {
+          if (error) {
+            reject(error);
+          } else {
+            onresolve = () => {
+              if (error) {
+                reject(error);
+              } else {
+                resolve2();
+              }
+            };
+          }
+        });
+        writable.on("drain", resume);
+        const cleanup = eos(
+          writable,
+          {
+            readable: false
+          },
+          resume
+        );
+        try {
+          if (writable.writableNeedDrain) {
+            await wait();
+          }
+          for await (const chunk of iterable) {
+            if (!writable.write(chunk)) {
+              await wait();
+            }
+          }
+          if (end) {
+            writable.end();
+            await wait();
+          }
+          finish();
+        } catch (err) {
+          finish(error !== err ? aggregateTwoErrors(error, err) : err);
+        } finally {
+          cleanup();
+          writable.off("drain", resume);
+        }
+      }
+      async function pumpToWeb(readable, writable, finish, { end }) {
+        if (isTransformStream(writable)) {
+          writable = writable.writable;
+        }
+        const writer = writable.getWriter();
+        try {
+          for await (const chunk of readable) {
+            await writer.ready;
+            writer.write(chunk).catch(() => {
+            });
+          }
+          await writer.ready;
+          if (end) {
+            await writer.close();
+          }
+          finish();
+        } catch (err) {
+          try {
+            await writer.abort(err);
+            finish(err);
+          } catch (err2) {
+            finish(err2);
+          }
+        }
+      }
+      function pipeline(...streams) {
+        return pipelineImpl(streams, once4(popCallback(streams)));
+      }
+      function pipelineImpl(streams, callback, opts) {
+        if (streams.length === 1 && ArrayIsArray(streams[0])) {
+          streams = streams[0];
+        }
+        if (streams.length < 2) {
+          throw new ERR_MISSING_ARGS("streams");
+        }
+        const ac = new AbortController();
+        const signal = ac.signal;
+        const outerSignal = opts === null || opts === void 0 ? void 0 : opts.signal;
+        const lastStreamCleanup = [];
+        validateAbortSignal(outerSignal, "options.signal");
+        function abort3() {
+          finishImpl(new AbortError());
+        }
+        addAbortListener = addAbortListener || require_util().addAbortListener;
+        let disposable;
+        if (outerSignal) {
+          disposable = addAbortListener(outerSignal, abort3);
+        }
+        let error;
+        let value;
+        const destroys = [];
+        let finishCount = 0;
+        function finish(err) {
+          finishImpl(err, --finishCount === 0);
+        }
+        function finishImpl(err, final) {
+          var _disposable;
+          if (err && (!error || error.code === "ERR_STREAM_PREMATURE_CLOSE")) {
+            error = err;
+          }
+          if (!error && !final) {
+            return;
+          }
+          while (destroys.length) {
+            destroys.shift()(error);
+          }
+          ;
+          (_disposable = disposable) === null || _disposable === void 0 ? void 0 : _disposable[SymbolDispose]();
+          ac.abort();
+          if (final) {
+            if (!error) {
+              lastStreamCleanup.forEach((fn) => fn());
+            }
+            process3.nextTick(callback, error, value);
+          }
+        }
+        let ret;
+        for (let i = 0; i < streams.length; i++) {
+          const stream = streams[i];
+          const reading = i < streams.length - 1;
+          const writing = i > 0;
+          const end = reading || (opts === null || opts === void 0 ? void 0 : opts.end) !== false;
+          const isLastStream = i === streams.length - 1;
+          if (isNodeStream(stream)) {
+            let onError2 = function(err) {
+              if (err && err.name !== "AbortError" && err.code !== "ERR_STREAM_PREMATURE_CLOSE") {
+                finish(err);
+              }
+            };
+            var onError = onError2;
+            if (end) {
+              const { destroy, cleanup } = destroyer(stream, reading, writing);
+              destroys.push(destroy);
+              if (isReadable(stream) && isLastStream) {
+                lastStreamCleanup.push(cleanup);
+              }
+            }
+            stream.on("error", onError2);
+            if (isReadable(stream) && isLastStream) {
+              lastStreamCleanup.push(() => {
+                stream.removeListener("error", onError2);
+              });
+            }
+          }
+          if (i === 0) {
+            if (typeof stream === "function") {
+              ret = stream({
+                signal
+              });
+              if (!isIterable(ret)) {
+                throw new ERR_INVALID_RETURN_VALUE("Iterable, AsyncIterable or Stream", "source", ret);
+              }
+            } else if (isIterable(stream) || isReadableNodeStream(stream) || isTransformStream(stream)) {
+              ret = stream;
+            } else {
+              ret = Duplex.from(stream);
+            }
+          } else if (typeof stream === "function") {
+            if (isTransformStream(ret)) {
+              var _ret;
+              ret = makeAsyncIterable((_ret = ret) === null || _ret === void 0 ? void 0 : _ret.readable);
+            } else {
+              ret = makeAsyncIterable(ret);
+            }
+            ret = stream(ret, {
+              signal
+            });
+            if (reading) {
+              if (!isIterable(ret, true)) {
+                throw new ERR_INVALID_RETURN_VALUE("AsyncIterable", `transform[${i - 1}]`, ret);
+              }
+            } else {
+              var _ret2;
+              if (!PassThrough) {
+                PassThrough = require_passthrough();
+              }
+              const pt = new PassThrough({
+                objectMode: true
+              });
+              const then = (_ret2 = ret) === null || _ret2 === void 0 ? void 0 : _ret2.then;
+              if (typeof then === "function") {
+                finishCount++;
+                then.call(
+                  ret,
+                  (val) => {
+                    value = val;
+                    if (val != null) {
+                      pt.write(val);
+                    }
+                    if (end) {
+                      pt.end();
+                    }
+                    process3.nextTick(finish);
+                  },
+                  (err) => {
+                    pt.destroy(err);
+                    process3.nextTick(finish, err);
+                  }
+                );
+              } else if (isIterable(ret, true)) {
+                finishCount++;
+                pumpToNode(ret, pt, finish, {
+                  end
+                });
+              } else if (isReadableStream(ret) || isTransformStream(ret)) {
+                const toRead = ret.readable || ret;
+                finishCount++;
+                pumpToNode(toRead, pt, finish, {
+                  end
+                });
+              } else {
+                throw new ERR_INVALID_RETURN_VALUE("AsyncIterable or Promise", "destination", ret);
+              }
+              ret = pt;
+              const { destroy, cleanup } = destroyer(ret, false, true);
+              destroys.push(destroy);
+              if (isLastStream) {
+                lastStreamCleanup.push(cleanup);
+              }
+            }
+          } else if (isNodeStream(stream)) {
+            if (isReadableNodeStream(ret)) {
+              finishCount += 2;
+              const cleanup = pipe(ret, stream, finish, {
+                end
+              });
+              if (isReadable(stream) && isLastStream) {
+                lastStreamCleanup.push(cleanup);
+              }
+            } else if (isTransformStream(ret) || isReadableStream(ret)) {
+              const toRead = ret.readable || ret;
+              finishCount++;
+              pumpToNode(toRead, stream, finish, {
+                end
+              });
+            } else if (isIterable(ret)) {
+              finishCount++;
+              pumpToNode(ret, stream, finish, {
+                end
+              });
+            } else {
+              throw new ERR_INVALID_ARG_TYPE(
+                "val",
+                ["Readable", "Iterable", "AsyncIterable", "ReadableStream", "TransformStream"],
+                ret
+              );
+            }
+            ret = stream;
+          } else if (isWebStream(stream)) {
+            if (isReadableNodeStream(ret)) {
+              finishCount++;
+              pumpToWeb(makeAsyncIterable(ret), stream, finish, {
+                end
+              });
+            } else if (isReadableStream(ret) || isIterable(ret)) {
+              finishCount++;
+              pumpToWeb(ret, stream, finish, {
+                end
+              });
+            } else if (isTransformStream(ret)) {
+              finishCount++;
+              pumpToWeb(ret.readable, stream, finish, {
+                end
+              });
+            } else {
+              throw new ERR_INVALID_ARG_TYPE(
+                "val",
+                ["Readable", "Iterable", "AsyncIterable", "ReadableStream", "TransformStream"],
+                ret
+              );
+            }
+            ret = stream;
+          } else {
+            ret = Duplex.from(stream);
+          }
+        }
+        if (signal !== null && signal !== void 0 && signal.aborted || outerSignal !== null && outerSignal !== void 0 && outerSignal.aborted) {
+          process3.nextTick(abort3);
+        }
+        return ret;
+      }
+      function pipe(src, dst, finish, { end }) {
+        let ended = false;
+        dst.on("close", () => {
+          if (!ended) {
+            finish(new ERR_STREAM_PREMATURE_CLOSE());
+          }
+        });
+        src.pipe(dst, {
+          end: false
+        });
+        if (end) {
+          let endFn2 = function() {
+            ended = true;
+            dst.end();
+          };
+          var endFn = endFn2;
+          if (isReadableFinished(src)) {
+            process3.nextTick(endFn2);
+          } else {
+            src.once("end", endFn2);
+          }
+        } else {
+          finish();
+        }
+        eos(
+          src,
+          {
+            readable: true,
+            writable: false
+          },
+          (err) => {
+            const rState = src._readableState;
+            if (err && err.code === "ERR_STREAM_PREMATURE_CLOSE" && rState && rState.ended && !rState.errored && !rState.errorEmitted) {
+              src.once("end", finish).once("error", finish);
+            } else {
+              finish(err);
+            }
+          }
+        );
+        return eos(
+          dst,
+          {
+            readable: false,
+            writable: true
+          },
+          finish
+        );
+      }
+      module.exports = {
+        pipelineImpl,
+        pipeline
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/compose.js
+  var require_compose = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/compose.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { pipeline } = require_pipeline();
+      var Duplex = require_duplex();
+      var { destroyer } = require_destroy();
+      var {
+        isNodeStream,
+        isReadable,
+        isWritable,
+        isWebStream,
+        isTransformStream,
+        isWritableStream,
+        isReadableStream
+      } = require_utils();
+      var {
+        AbortError,
+        codes: { ERR_INVALID_ARG_VALUE, ERR_MISSING_ARGS }
+      } = require_errors();
+      var eos = require_end_of_stream();
+      module.exports = function compose(...streams) {
+        if (streams.length === 0) {
+          throw new ERR_MISSING_ARGS("streams");
+        }
+        if (streams.length === 1) {
+          return Duplex.from(streams[0]);
+        }
+        const orgStreams = [...streams];
+        if (typeof streams[0] === "function") {
+          streams[0] = Duplex.from(streams[0]);
+        }
+        if (typeof streams[streams.length - 1] === "function") {
+          const idx = streams.length - 1;
+          streams[idx] = Duplex.from(streams[idx]);
+        }
+        for (let n = 0; n < streams.length; ++n) {
+          if (!isNodeStream(streams[n]) && !isWebStream(streams[n])) {
+            continue;
+          }
+          if (n < streams.length - 1 && !(isReadable(streams[n]) || isReadableStream(streams[n]) || isTransformStream(streams[n]))) {
+            throw new ERR_INVALID_ARG_VALUE(`streams[${n}]`, orgStreams[n], "must be readable");
+          }
+          if (n > 0 && !(isWritable(streams[n]) || isWritableStream(streams[n]) || isTransformStream(streams[n]))) {
+            throw new ERR_INVALID_ARG_VALUE(`streams[${n}]`, orgStreams[n], "must be writable");
+          }
+        }
+        let ondrain;
+        let onfinish;
+        let onreadable;
+        let onclose;
+        let d;
+        function onfinished(err) {
+          const cb = onclose;
+          onclose = null;
+          if (cb) {
+            cb(err);
+          } else if (err) {
+            d.destroy(err);
+          } else if (!readable && !writable) {
+            d.destroy();
+          }
+        }
+        const head = streams[0];
+        const tail = pipeline(streams, onfinished);
+        const writable = !!(isWritable(head) || isWritableStream(head) || isTransformStream(head));
+        const readable = !!(isReadable(tail) || isReadableStream(tail) || isTransformStream(tail));
+        d = new Duplex({
+          // TODO (ronag): highWaterMark?
+          writableObjectMode: !!(head !== null && head !== void 0 && head.writableObjectMode),
+          readableObjectMode: !!(tail !== null && tail !== void 0 && tail.readableObjectMode),
+          writable,
+          readable
+        });
+        if (writable) {
+          if (isNodeStream(head)) {
+            d._write = function(chunk, encoding, callback) {
+              if (head.write(chunk, encoding)) {
+                callback();
+              } else {
+                ondrain = callback;
+              }
+            };
+            d._final = function(callback) {
+              head.end();
+              onfinish = callback;
+            };
+            head.on("drain", function() {
+              if (ondrain) {
+                const cb = ondrain;
+                ondrain = null;
+                cb();
+              }
+            });
+          } else if (isWebStream(head)) {
+            const writable2 = isTransformStream(head) ? head.writable : head;
+            const writer = writable2.getWriter();
+            d._write = async function(chunk, encoding, callback) {
+              try {
+                await writer.ready;
+                writer.write(chunk).catch(() => {
+                });
+                callback();
+              } catch (err) {
+                callback(err);
+              }
+            };
+            d._final = async function(callback) {
+              try {
+                await writer.ready;
+                writer.close().catch(() => {
+                });
+                onfinish = callback;
+              } catch (err) {
+                callback(err);
+              }
+            };
+          }
+          const toRead = isTransformStream(tail) ? tail.readable : tail;
+          eos(toRead, () => {
+            if (onfinish) {
+              const cb = onfinish;
+              onfinish = null;
+              cb();
+            }
+          });
+        }
+        if (readable) {
+          if (isNodeStream(tail)) {
+            tail.on("readable", function() {
+              if (onreadable) {
+                const cb = onreadable;
+                onreadable = null;
+                cb();
+              }
+            });
+            tail.on("end", function() {
+              d.push(null);
+            });
+            d._read = function() {
+              while (true) {
+                const buf = tail.read();
+                if (buf === null) {
+                  onreadable = d._read;
+                  return;
+                }
+                if (!d.push(buf)) {
+                  return;
+                }
+              }
+            };
+          } else if (isWebStream(tail)) {
+            const readable2 = isTransformStream(tail) ? tail.readable : tail;
+            const reader = readable2.getReader();
+            d._read = async function() {
+              while (true) {
+                try {
+                  const { value, done } = await reader.read();
+                  if (!d.push(value)) {
+                    return;
+                  }
+                  if (done) {
+                    d.push(null);
+                    return;
+                  }
+                } catch {
+                  return;
+                }
+              }
+            };
+          }
+        }
+        d._destroy = function(err, callback) {
+          if (!err && onclose !== null) {
+            err = new AbortError();
+          }
+          onreadable = null;
+          ondrain = null;
+          onfinish = null;
+          if (onclose === null) {
+            callback(err);
+          } else {
+            onclose = callback;
+            if (isNodeStream(tail)) {
+              destroyer(tail, err);
+            }
+          }
+        };
+        return d;
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/internal/streams/operators.js
+  var require_operators = __commonJS({
+    "node_modules/readable-stream/lib/internal/streams/operators.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var AbortController = globalThis.AbortController || require_browser().AbortController;
+      var {
+        codes: { ERR_INVALID_ARG_VALUE, ERR_INVALID_ARG_TYPE, ERR_MISSING_ARGS, ERR_OUT_OF_RANGE },
+        AbortError
+      } = require_errors();
+      var { validateAbortSignal, validateInteger, validateObject } = require_validators();
+      var kWeakHandler = require_primordials().Symbol("kWeak");
+      var kResistStopPropagation = require_primordials().Symbol("kResistStopPropagation");
+      var { finished } = require_end_of_stream();
+      var staticCompose = require_compose();
+      var { addAbortSignalNoValidate } = require_add_abort_signal();
+      var { isWritable, isNodeStream } = require_utils();
+      var { deprecate } = require_util();
+      var {
+        ArrayPrototypePush,
+        Boolean: Boolean2,
+        MathFloor,
+        Number: Number2,
+        NumberIsNaN,
+        Promise: Promise2,
+        PromiseReject,
+        PromiseResolve,
+        PromisePrototypeThen,
+        Symbol: Symbol2
+      } = require_primordials();
+      var kEmpty = Symbol2("kEmpty");
+      var kEof = Symbol2("kEof");
+      function compose(stream, options) {
+        if (options != null) {
+          validateObject(options, "options");
+        }
+        if ((options === null || options === void 0 ? void 0 : options.signal) != null) {
+          validateAbortSignal(options.signal, "options.signal");
+        }
+        if (isNodeStream(stream) && !isWritable(stream)) {
+          throw new ERR_INVALID_ARG_VALUE("stream", stream, "must be writable");
+        }
+        const composedStream = staticCompose(this, stream);
+        if (options !== null && options !== void 0 && options.signal) {
+          addAbortSignalNoValidate(options.signal, composedStream);
+        }
+        return composedStream;
+      }
+      function map(fn, options) {
+        if (typeof fn !== "function") {
+          throw new ERR_INVALID_ARG_TYPE("fn", ["Function", "AsyncFunction"], fn);
+        }
+        if (options != null) {
+          validateObject(options, "options");
+        }
+        if ((options === null || options === void 0 ? void 0 : options.signal) != null) {
+          validateAbortSignal(options.signal, "options.signal");
+        }
+        let concurrency = 1;
+        if ((options === null || options === void 0 ? void 0 : options.concurrency) != null) {
+          concurrency = MathFloor(options.concurrency);
+        }
+        let highWaterMark = concurrency - 1;
+        if ((options === null || options === void 0 ? void 0 : options.highWaterMark) != null) {
+          highWaterMark = MathFloor(options.highWaterMark);
+        }
+        validateInteger(concurrency, "options.concurrency", 1);
+        validateInteger(highWaterMark, "options.highWaterMark", 0);
+        highWaterMark += concurrency;
+        return async function* map2() {
+          const signal = require_util().AbortSignalAny(
+            [options === null || options === void 0 ? void 0 : options.signal].filter(Boolean2)
+          );
+          const stream = this;
+          const queue3 = [];
+          const signalOpt = {
+            signal
+          };
+          let next;
+          let resume;
+          let done = false;
+          let cnt = 0;
+          function onCatch() {
+            done = true;
+            afterItemProcessed();
+          }
+          function afterItemProcessed() {
+            cnt -= 1;
+            maybeResume();
+          }
+          function maybeResume() {
+            if (resume && !done && cnt < concurrency && queue3.length < highWaterMark) {
+              resume();
+              resume = null;
+            }
+          }
+          async function pump() {
+            try {
+              for await (let val of stream) {
+                if (done) {
+                  return;
+                }
+                if (signal.aborted) {
+                  throw new AbortError();
+                }
+                try {
+                  val = fn(val, signalOpt);
+                  if (val === kEmpty) {
+                    continue;
+                  }
+                  val = PromiseResolve(val);
+                } catch (err) {
+                  val = PromiseReject(err);
+                }
+                cnt += 1;
+                PromisePrototypeThen(val, afterItemProcessed, onCatch);
+                queue3.push(val);
+                if (next) {
+                  next();
+                  next = null;
+                }
+                if (!done && (queue3.length >= highWaterMark || cnt >= concurrency)) {
+                  await new Promise2((resolve2) => {
+                    resume = resolve2;
+                  });
+                }
+              }
+              queue3.push(kEof);
+            } catch (err) {
+              const val = PromiseReject(err);
+              PromisePrototypeThen(val, afterItemProcessed, onCatch);
+              queue3.push(val);
+            } finally {
+              done = true;
+              if (next) {
+                next();
+                next = null;
+              }
+            }
+          }
+          pump();
+          try {
+            while (true) {
+              while (queue3.length > 0) {
+                const val = await queue3[0];
+                if (val === kEof) {
+                  return;
+                }
+                if (signal.aborted) {
+                  throw new AbortError();
+                }
+                if (val !== kEmpty) {
+                  yield val;
+                }
+                queue3.shift();
+                maybeResume();
+              }
+              await new Promise2((resolve2) => {
+                next = resolve2;
+              });
+            }
+          } finally {
+            done = true;
+            if (resume) {
+              resume();
+              resume = null;
+            }
+          }
+        }.call(this);
+      }
+      function asIndexedPairs(options = void 0) {
+        if (options != null) {
+          validateObject(options, "options");
+        }
+        if ((options === null || options === void 0 ? void 0 : options.signal) != null) {
+          validateAbortSignal(options.signal, "options.signal");
+        }
+        return async function* asIndexedPairs2() {
+          let index = 0;
+          for await (const val of this) {
+            var _options$signal;
+            if (options !== null && options !== void 0 && (_options$signal = options.signal) !== null && _options$signal !== void 0 && _options$signal.aborted) {
+              throw new AbortError({
+                cause: options.signal.reason
+              });
+            }
+            yield [index++, val];
+          }
+        }.call(this);
+      }
+      async function some(fn, options = void 0) {
+        for await (const unused of filter.call(this, fn, options)) {
+          return true;
+        }
+        return false;
+      }
+      async function every(fn, options = void 0) {
+        if (typeof fn !== "function") {
+          throw new ERR_INVALID_ARG_TYPE("fn", ["Function", "AsyncFunction"], fn);
+        }
+        return !await some.call(
+          this,
+          async (...args) => {
+            return !await fn(...args);
+          },
+          options
+        );
+      }
+      async function find(fn, options) {
+        for await (const result of filter.call(this, fn, options)) {
+          return result;
+        }
+        return void 0;
+      }
+      async function forEach(fn, options) {
+        if (typeof fn !== "function") {
+          throw new ERR_INVALID_ARG_TYPE("fn", ["Function", "AsyncFunction"], fn);
+        }
+        async function forEachFn(value, options2) {
+          await fn(value, options2);
+          return kEmpty;
+        }
+        for await (const unused of map.call(this, forEachFn, options)) ;
+      }
+      function filter(fn, options) {
+        if (typeof fn !== "function") {
+          throw new ERR_INVALID_ARG_TYPE("fn", ["Function", "AsyncFunction"], fn);
+        }
+        async function filterFn(value, options2) {
+          if (await fn(value, options2)) {
+            return value;
+          }
+          return kEmpty;
+        }
+        return map.call(this, filterFn, options);
+      }
+      var ReduceAwareErrMissingArgs = class extends ERR_MISSING_ARGS {
+        constructor() {
+          super("reduce");
+          this.message = "Reduce of an empty stream requires an initial value";
+        }
+      };
+      async function reduce(reducer, initialValue, options) {
+        var _options$signal2;
+        if (typeof reducer !== "function") {
+          throw new ERR_INVALID_ARG_TYPE("reducer", ["Function", "AsyncFunction"], reducer);
+        }
+        if (options != null) {
+          validateObject(options, "options");
+        }
+        if ((options === null || options === void 0 ? void 0 : options.signal) != null) {
+          validateAbortSignal(options.signal, "options.signal");
+        }
+        let hasInitialValue = arguments.length > 1;
+        if (options !== null && options !== void 0 && (_options$signal2 = options.signal) !== null && _options$signal2 !== void 0 && _options$signal2.aborted) {
+          const err = new AbortError(void 0, {
+            cause: options.signal.reason
+          });
+          this.once("error", () => {
+          });
+          await finished(this.destroy(err));
+          throw err;
+        }
+        const ac = new AbortController();
+        const signal = ac.signal;
+        if (options !== null && options !== void 0 && options.signal) {
+          const opts = {
+            once: true,
+            [kWeakHandler]: this,
+            [kResistStopPropagation]: true
+          };
+          options.signal.addEventListener("abort", () => ac.abort(), opts);
+        }
+        let gotAnyItemFromStream = false;
+        try {
+          for await (const value of this) {
+            var _options$signal3;
+            gotAnyItemFromStream = true;
+            if (options !== null && options !== void 0 && (_options$signal3 = options.signal) !== null && _options$signal3 !== void 0 && _options$signal3.aborted) {
+              throw new AbortError();
+            }
+            if (!hasInitialValue) {
+              initialValue = value;
+              hasInitialValue = true;
+            } else {
+              initialValue = await reducer(initialValue, value, {
+                signal
+              });
+            }
+          }
+          if (!gotAnyItemFromStream && !hasInitialValue) {
+            throw new ReduceAwareErrMissingArgs();
+          }
+        } finally {
+          ac.abort();
+        }
+        return initialValue;
+      }
+      async function toArray(options) {
+        if (options != null) {
+          validateObject(options, "options");
+        }
+        if ((options === null || options === void 0 ? void 0 : options.signal) != null) {
+          validateAbortSignal(options.signal, "options.signal");
+        }
+        const result = [];
+        for await (const val of this) {
+          var _options$signal4;
+          if (options !== null && options !== void 0 && (_options$signal4 = options.signal) !== null && _options$signal4 !== void 0 && _options$signal4.aborted) {
+            throw new AbortError(void 0, {
+              cause: options.signal.reason
+            });
+          }
+          ArrayPrototypePush(result, val);
+        }
+        return result;
+      }
+      function flatMap(fn, options) {
+        const values = map.call(this, fn, options);
+        return async function* flatMap2() {
+          for await (const val of values) {
+            yield* val;
+          }
+        }.call(this);
+      }
+      function toIntegerOrInfinity(number) {
+        number = Number2(number);
+        if (NumberIsNaN(number)) {
+          return 0;
+        }
+        if (number < 0) {
+          throw new ERR_OUT_OF_RANGE("number", ">= 0", number);
+        }
+        return number;
+      }
+      function drop(number, options = void 0) {
+        if (options != null) {
+          validateObject(options, "options");
+        }
+        if ((options === null || options === void 0 ? void 0 : options.signal) != null) {
+          validateAbortSignal(options.signal, "options.signal");
+        }
+        number = toIntegerOrInfinity(number);
+        return async function* drop2() {
+          var _options$signal5;
+          if (options !== null && options !== void 0 && (_options$signal5 = options.signal) !== null && _options$signal5 !== void 0 && _options$signal5.aborted) {
+            throw new AbortError();
+          }
+          for await (const val of this) {
+            var _options$signal6;
+            if (options !== null && options !== void 0 && (_options$signal6 = options.signal) !== null && _options$signal6 !== void 0 && _options$signal6.aborted) {
+              throw new AbortError();
+            }
+            if (number-- <= 0) {
+              yield val;
+            }
+          }
+        }.call(this);
+      }
+      function take(number, options = void 0) {
+        if (options != null) {
+          validateObject(options, "options");
+        }
+        if ((options === null || options === void 0 ? void 0 : options.signal) != null) {
+          validateAbortSignal(options.signal, "options.signal");
+        }
+        number = toIntegerOrInfinity(number);
+        return async function* take2() {
+          var _options$signal7;
+          if (options !== null && options !== void 0 && (_options$signal7 = options.signal) !== null && _options$signal7 !== void 0 && _options$signal7.aborted) {
+            throw new AbortError();
+          }
+          for await (const val of this) {
+            var _options$signal8;
+            if (options !== null && options !== void 0 && (_options$signal8 = options.signal) !== null && _options$signal8 !== void 0 && _options$signal8.aborted) {
+              throw new AbortError();
+            }
+            if (number-- > 0) {
+              yield val;
+            }
+            if (number <= 0) {
+              return;
+            }
+          }
+        }.call(this);
+      }
+      module.exports.streamReturningOperators = {
+        asIndexedPairs: deprecate(asIndexedPairs, "readable.asIndexedPairs will be removed in a future version."),
+        drop,
+        filter,
+        flatMap,
+        map,
+        take,
+        compose
+      };
+      module.exports.promiseReturningOperators = {
+        every,
+        forEach,
+        reduce,
+        toArray,
+        some,
+        find
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/stream/promises.js
+  var require_promises = __commonJS({
+    "node_modules/readable-stream/lib/stream/promises.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { ArrayPrototypePop, Promise: Promise2 } = require_primordials();
+      var { isIterable, isNodeStream, isWebStream } = require_utils();
+      var { pipelineImpl: pl } = require_pipeline();
+      var { finished } = require_end_of_stream();
+      require_stream();
+      function pipeline(...streams) {
+        return new Promise2((resolve2, reject) => {
+          let signal;
+          let end;
+          const lastArg = streams[streams.length - 1];
+          if (lastArg && typeof lastArg === "object" && !isNodeStream(lastArg) && !isIterable(lastArg) && !isWebStream(lastArg)) {
+            const options = ArrayPrototypePop(streams);
+            signal = options.signal;
+            end = options.end;
+          }
+          pl(
+            streams,
+            (err, value) => {
+              if (err) {
+                reject(err);
+              } else {
+                resolve2(value);
+              }
+            },
+            {
+              signal,
+              end
+            }
+          );
+        });
+      }
+      module.exports = {
+        finished,
+        pipeline
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/stream.js
+  var require_stream = __commonJS({
+    "node_modules/readable-stream/lib/stream.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { Buffer: Buffer3 } = (init_buffer(), __toCommonJS(buffer_exports));
+      var { ObjectDefineProperty, ObjectKeys, ReflectApply } = require_primordials();
+      var {
+        promisify: { custom: customPromisify }
+      } = require_util();
+      var { streamReturningOperators, promiseReturningOperators } = require_operators();
+      var {
+        codes: { ERR_ILLEGAL_CONSTRUCTOR }
+      } = require_errors();
+      var compose = require_compose();
+      var { setDefaultHighWaterMark, getDefaultHighWaterMark } = require_state();
+      var { pipeline } = require_pipeline();
+      var { destroyer } = require_destroy();
+      var eos = require_end_of_stream();
+      var promises = require_promises();
+      var utils = require_utils();
+      var Stream = module.exports = require_legacy().Stream;
+      Stream.isDestroyed = utils.isDestroyed;
+      Stream.isDisturbed = utils.isDisturbed;
+      Stream.isErrored = utils.isErrored;
+      Stream.isReadable = utils.isReadable;
+      Stream.isWritable = utils.isWritable;
+      Stream.Readable = require_readable();
+      for (const key of ObjectKeys(streamReturningOperators)) {
+        let fn = function(...args) {
+          if (new.target) {
+            throw ERR_ILLEGAL_CONSTRUCTOR();
+          }
+          return Stream.Readable.from(ReflectApply(op, this, args));
+        };
+        const op = streamReturningOperators[key];
+        ObjectDefineProperty(fn, "name", {
+          __proto__: null,
+          value: op.name
+        });
+        ObjectDefineProperty(fn, "length", {
+          __proto__: null,
+          value: op.length
+        });
+        ObjectDefineProperty(Stream.Readable.prototype, key, {
+          __proto__: null,
+          value: fn,
+          enumerable: false,
+          configurable: true,
+          writable: true
+        });
+      }
+      for (const key of ObjectKeys(promiseReturningOperators)) {
+        let fn = function(...args) {
+          if (new.target) {
+            throw ERR_ILLEGAL_CONSTRUCTOR();
+          }
+          return ReflectApply(op, this, args);
+        };
+        const op = promiseReturningOperators[key];
+        ObjectDefineProperty(fn, "name", {
+          __proto__: null,
+          value: op.name
+        });
+        ObjectDefineProperty(fn, "length", {
+          __proto__: null,
+          value: op.length
+        });
+        ObjectDefineProperty(Stream.Readable.prototype, key, {
+          __proto__: null,
+          value: fn,
+          enumerable: false,
+          configurable: true,
+          writable: true
+        });
+      }
+      Stream.Writable = require_writable();
+      Stream.Duplex = require_duplex();
+      Stream.Transform = require_transform();
+      Stream.PassThrough = require_passthrough();
+      Stream.pipeline = pipeline;
+      var { addAbortSignal } = require_add_abort_signal();
+      Stream.addAbortSignal = addAbortSignal;
+      Stream.finished = eos;
+      Stream.destroy = destroyer;
+      Stream.compose = compose;
+      Stream.setDefaultHighWaterMark = setDefaultHighWaterMark;
+      Stream.getDefaultHighWaterMark = getDefaultHighWaterMark;
+      ObjectDefineProperty(Stream, "promises", {
+        __proto__: null,
+        configurable: true,
+        enumerable: true,
+        get() {
+          return promises;
+        }
+      });
+      ObjectDefineProperty(pipeline, customPromisify, {
+        __proto__: null,
+        enumerable: true,
+        get() {
+          return promises.pipeline;
+        }
+      });
+      ObjectDefineProperty(eos, customPromisify, {
+        __proto__: null,
+        enumerable: true,
+        get() {
+          return promises.finished;
+        }
+      });
+      Stream.Stream = Stream;
+      Stream._isUint8Array = function isUint8Array(value) {
+        return value instanceof Uint8Array;
+      };
+      Stream._uint8ArrayToBuffer = function _uint8ArrayToBuffer(chunk) {
+        return Buffer3.from(chunk.buffer, chunk.byteOffset, chunk.byteLength);
+      };
+    }
+  });
+
+  // node_modules/readable-stream/lib/ours/browser.js
+  var require_browser3 = __commonJS({
+    "node_modules/readable-stream/lib/ours/browser.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var CustomStream = require_stream();
+      var promises = require_promises();
+      var originalDestroy = CustomStream.Readable.destroy;
+      module.exports = CustomStream.Readable;
+      module.exports._uint8ArrayToBuffer = CustomStream._uint8ArrayToBuffer;
+      module.exports._isUint8Array = CustomStream._isUint8Array;
+      module.exports.isDisturbed = CustomStream.isDisturbed;
+      module.exports.isErrored = CustomStream.isErrored;
+      module.exports.isReadable = CustomStream.isReadable;
+      module.exports.Readable = CustomStream.Readable;
+      module.exports.Writable = CustomStream.Writable;
+      module.exports.Duplex = CustomStream.Duplex;
+      module.exports.Transform = CustomStream.Transform;
+      module.exports.PassThrough = CustomStream.PassThrough;
+      module.exports.addAbortSignal = CustomStream.addAbortSignal;
+      module.exports.finished = CustomStream.finished;
+      module.exports.destroy = CustomStream.destroy;
+      module.exports.destroy = originalDestroy;
+      module.exports.pipeline = CustomStream.pipeline;
+      module.exports.compose = CustomStream.compose;
+      Object.defineProperty(CustomStream, "promises", {
+        configurable: true,
+        enumerable: true,
+        get() {
+          return promises;
+        }
+      });
+      module.exports.Stream = CustomStream.Stream;
+      module.exports.default = module.exports;
+    }
+  });
+
+  // node_modules/inherits/inherits_browser.js
+  var require_inherits_browser = __commonJS({
+    "node_modules/inherits/inherits_browser.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      if (typeof Object.create === "function") {
+        module.exports = function inherits(ctor, superCtor) {
+          if (superCtor) {
+            ctor.super_ = superCtor;
+            ctor.prototype = Object.create(superCtor.prototype, {
+              constructor: {
+                value: ctor,
+                enumerable: false,
+                writable: true,
+                configurable: true
+              }
+            });
+          }
+        };
+      } else {
+        module.exports = function inherits(ctor, superCtor) {
+          if (superCtor) {
+            ctor.super_ = superCtor;
+            var TempCtor = function() {
+            };
+            TempCtor.prototype = superCtor.prototype;
+            ctor.prototype = new TempCtor();
+            ctor.prototype.constructor = ctor;
+          }
+        };
+      }
+    }
+  });
+
+  // node_modules/bl/BufferList.js
+  var require_BufferList = __commonJS({
+    "node_modules/bl/BufferList.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { Buffer: Buffer3 } = (init_buffer(), __toCommonJS(buffer_exports));
+      var symbol = Symbol.for("BufferList");
+      function BufferList(buf) {
+        if (!(this instanceof BufferList)) {
+          return new BufferList(buf);
+        }
+        BufferList._init.call(this, buf);
+      }
+      BufferList._init = function _init(buf) {
+        Object.defineProperty(this, symbol, { value: true });
+        this._bufs = [];
+        this.length = 0;
+        if (buf) {
+          this.append(buf);
+        }
+      };
+      BufferList.prototype._new = function _new(buf) {
+        return new BufferList(buf);
+      };
+      BufferList.prototype._offset = function _offset(offset) {
+        if (offset === 0) {
+          return [0, 0];
+        }
+        let tot = 0;
+        for (let i = 0; i < this._bufs.length; i++) {
+          const _t = tot + this._bufs[i].length;
+          if (offset < _t || i === this._bufs.length - 1) {
+            return [i, offset - tot];
+          }
+          tot = _t;
+        }
+      };
+      BufferList.prototype._reverseOffset = function(blOffset) {
+        const bufferId = blOffset[0];
+        let offset = blOffset[1];
+        for (let i = 0; i < bufferId; i++) {
+          offset += this._bufs[i].length;
+        }
+        return offset;
+      };
+      BufferList.prototype.getBuffers = function getBuffers() {
+        return this._bufs;
+      };
+      BufferList.prototype.get = function get(index) {
+        if (index > this.length || index < 0) {
+          return void 0;
+        }
+        const offset = this._offset(index);
+        return this._bufs[offset[0]][offset[1]];
+      };
+      BufferList.prototype.slice = function slice(start, end) {
+        if (typeof start === "number" && start < 0) {
+          start += this.length;
+        }
+        if (typeof end === "number" && end < 0) {
+          end += this.length;
+        }
+        return this.copy(null, 0, start, end);
+      };
+      BufferList.prototype.copy = function copy(dst, dstStart, srcStart, srcEnd) {
+        if (typeof srcStart !== "number" || srcStart < 0) {
+          srcStart = 0;
+        }
+        if (typeof srcEnd !== "number" || srcEnd > this.length) {
+          srcEnd = this.length;
+        }
+        if (srcStart >= this.length) {
+          return dst || Buffer3.alloc(0);
+        }
+        if (srcEnd <= 0) {
+          return dst || Buffer3.alloc(0);
+        }
+        const copy2 = !!dst;
+        const off3 = this._offset(srcStart);
+        const len = srcEnd - srcStart;
+        let bytes = len;
+        let bufoff = copy2 && dstStart || 0;
+        let start = off3[1];
+        if (srcStart === 0 && srcEnd === this.length) {
+          if (!copy2) {
+            return this._bufs.length === 1 ? this._bufs[0] : Buffer3.concat(this._bufs, this.length);
+          }
+          for (let i = 0; i < this._bufs.length; i++) {
+            this._bufs[i].copy(dst, bufoff);
+            bufoff += this._bufs[i].length;
+          }
+          return dst;
+        }
+        if (bytes <= this._bufs[off3[0]].length - start) {
+          return copy2 ? this._bufs[off3[0]].copy(dst, dstStart, start, start + bytes) : this._bufs[off3[0]].slice(start, start + bytes);
+        }
+        if (!copy2) {
+          dst = Buffer3.allocUnsafe(len);
+        }
+        for (let i = off3[0]; i < this._bufs.length; i++) {
+          const l = this._bufs[i].length - start;
+          if (bytes > l) {
+            this._bufs[i].copy(dst, bufoff, start);
+            bufoff += l;
+          } else {
+            this._bufs[i].copy(dst, bufoff, start, start + bytes);
+            bufoff += l;
+            break;
+          }
+          bytes -= l;
+          if (start) {
+            start = 0;
+          }
+        }
+        if (dst.length > bufoff) return dst.slice(0, bufoff);
+        return dst;
+      };
+      BufferList.prototype.shallowSlice = function shallowSlice(start, end) {
+        start = start || 0;
+        end = typeof end !== "number" ? this.length : end;
+        if (start < 0) {
+          start += this.length;
+        }
+        if (end < 0) {
+          end += this.length;
+        }
+        if (start === end) {
+          return this._new();
+        }
+        const startOffset = this._offset(start);
+        const endOffset = this._offset(end);
+        const buffers = this._bufs.slice(startOffset[0], endOffset[0] + 1);
+        if (endOffset[1] === 0) {
+          buffers.pop();
+        } else {
+          buffers[buffers.length - 1] = buffers[buffers.length - 1].slice(0, endOffset[1]);
+        }
+        if (startOffset[1] !== 0) {
+          buffers[0] = buffers[0].slice(startOffset[1]);
+        }
+        return this._new(buffers);
+      };
+      BufferList.prototype.toString = function toString(encoding, start, end) {
+        return this.slice(start, end).toString(encoding);
+      };
+      BufferList.prototype.consume = function consume(bytes) {
+        bytes = Math.trunc(bytes);
+        if (Number.isNaN(bytes) || bytes <= 0) return this;
+        while (this._bufs.length) {
+          if (bytes >= this._bufs[0].length) {
+            bytes -= this._bufs[0].length;
+            this.length -= this._bufs[0].length;
+            this._bufs.shift();
+          } else {
+            this._bufs[0] = this._bufs[0].slice(bytes);
+            this.length -= bytes;
+            break;
+          }
+        }
+        return this;
+      };
+      BufferList.prototype.duplicate = function duplicate() {
+        const copy = this._new();
+        for (let i = 0; i < this._bufs.length; i++) {
+          copy.append(this._bufs[i]);
+        }
+        return copy;
+      };
+      BufferList.prototype.append = function append(buf) {
+        return this._attach(buf, BufferList.prototype._appendBuffer);
+      };
+      BufferList.prototype.prepend = function prepend(buf) {
+        return this._attach(buf, BufferList.prototype._prependBuffer, true);
+      };
+      BufferList.prototype._attach = function _attach(buf, attacher, prepend) {
+        if (buf == null) {
+          return this;
+        }
+        if (buf.buffer) {
+          attacher.call(this, Buffer3.from(buf.buffer, buf.byteOffset, buf.byteLength));
+        } else if (Array.isArray(buf)) {
+          const [starting, modifier] = prepend ? [buf.length - 1, -1] : [0, 1];
+          for (let i = starting; i >= 0 && i < buf.length; i += modifier) {
+            this._attach(buf[i], attacher, prepend);
+          }
+        } else if (this._isBufferList(buf)) {
+          const [starting, modifier] = prepend ? [buf._bufs.length - 1, -1] : [0, 1];
+          for (let i = starting; i >= 0 && i < buf._bufs.length; i += modifier) {
+            this._attach(buf._bufs[i], attacher, prepend);
+          }
+        } else {
+          if (typeof buf === "number") {
+            buf = buf.toString();
+          }
+          attacher.call(this, Buffer3.from(buf));
+        }
+        return this;
+      };
+      BufferList.prototype._appendBuffer = function appendBuffer(buf) {
+        this._bufs.push(buf);
+        this.length += buf.length;
+      };
+      BufferList.prototype._prependBuffer = function prependBuffer(buf) {
+        this._bufs.unshift(buf);
+        this.length += buf.length;
+      };
+      BufferList.prototype.indexOf = function(search, offset, encoding) {
+        if (encoding === void 0 && typeof offset === "string") {
+          encoding = offset;
+          offset = void 0;
+        }
+        if (typeof search === "function" || Array.isArray(search)) {
+          throw new TypeError('The "value" argument must be one of type string, Buffer, BufferList, or Uint8Array.');
+        } else if (typeof search === "number") {
+          search = Buffer3.from([search]);
+        } else if (typeof search === "string") {
+          search = Buffer3.from(search, encoding);
+        } else if (this._isBufferList(search)) {
+          search = search.slice();
+        } else if (Array.isArray(search.buffer)) {
+          search = Buffer3.from(search.buffer, search.byteOffset, search.byteLength);
+        } else if (!Buffer3.isBuffer(search)) {
+          search = Buffer3.from(search);
+        }
+        offset = Number(offset || 0);
+        if (isNaN(offset)) {
+          offset = 0;
+        }
+        if (offset < 0) {
+          offset = this.length + offset;
+        }
+        if (offset < 0) {
+          offset = 0;
+        }
+        if (search.length === 0) {
+          return offset > this.length ? this.length : offset;
+        }
+        const blOffset = this._offset(offset);
+        let blIndex = blOffset[0];
+        let buffOffset = blOffset[1];
+        for (; blIndex < this._bufs.length; blIndex++) {
+          const buff = this._bufs[blIndex];
+          while (buffOffset < buff.length) {
+            const availableWindow = buff.length - buffOffset;
+            if (availableWindow >= search.length) {
+              const nativeSearchResult = buff.indexOf(search, buffOffset);
+              if (nativeSearchResult !== -1) {
+                return this._reverseOffset([blIndex, nativeSearchResult]);
+              }
+              buffOffset = buff.length - search.length + 1;
+            } else {
+              const revOffset = this._reverseOffset([blIndex, buffOffset]);
+              if (this._match(revOffset, search)) {
+                return revOffset;
+              }
+              buffOffset++;
+            }
+          }
+          buffOffset = 0;
+        }
+        return -1;
+      };
+      BufferList.prototype._match = function(offset, search) {
+        if (this.length - offset < search.length) {
+          return false;
+        }
+        for (let searchOffset = 0; searchOffset < search.length; searchOffset++) {
+          if (this.get(offset + searchOffset) !== search[searchOffset]) {
+            return false;
+          }
+        }
+        return true;
+      };
+      (function() {
+        const methods = {
+          readDoubleBE: 8,
+          readDoubleLE: 8,
+          readFloatBE: 4,
+          readFloatLE: 4,
+          readBigInt64BE: 8,
+          readBigInt64LE: 8,
+          readBigUInt64BE: 8,
+          readBigUInt64LE: 8,
+          readInt32BE: 4,
+          readInt32LE: 4,
+          readUInt32BE: 4,
+          readUInt32LE: 4,
+          readInt16BE: 2,
+          readInt16LE: 2,
+          readUInt16BE: 2,
+          readUInt16LE: 2,
+          readInt8: 1,
+          readUInt8: 1,
+          readIntBE: null,
+          readIntLE: null,
+          readUIntBE: null,
+          readUIntLE: null
+        };
+        for (const m in methods) {
+          (function(m2) {
+            if (methods[m2] === null) {
+              BufferList.prototype[m2] = function(offset, byteLength) {
+                return this.slice(offset, offset + byteLength)[m2](0, byteLength);
+              };
+            } else {
+              BufferList.prototype[m2] = function(offset = 0) {
+                return this.slice(offset, offset + methods[m2])[m2](0);
+              };
+            }
+          })(m);
+        }
+      })();
+      BufferList.prototype._isBufferList = function _isBufferList(b) {
+        return b instanceof BufferList || BufferList.isBufferList(b);
+      };
+      BufferList.isBufferList = function isBufferList(b) {
+        return b != null && b[symbol];
+      };
+      module.exports = BufferList;
+    }
+  });
+
+  // node_modules/bl/bl.js
+  var require_bl = __commonJS({
+    "node_modules/bl/bl.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var DuplexStream = require_browser3().Duplex;
+      var inherits = require_inherits_browser();
+      var BufferList = require_BufferList();
+      function BufferListStream(callback) {
+        if (!(this instanceof BufferListStream)) {
+          return new BufferListStream(callback);
+        }
+        if (typeof callback === "function") {
+          this._callback = callback;
+          const piper = function piper2(err) {
+            if (this._callback) {
+              this._callback(err);
+              this._callback = null;
+            }
+          }.bind(this);
+          this.on("pipe", function onPipe(src) {
+            src.on("error", piper);
+          });
+          this.on("unpipe", function onUnpipe(src) {
+            src.removeListener("error", piper);
+          });
+          callback = null;
+        }
+        BufferList._init.call(this, callback);
+        DuplexStream.call(this);
+      }
+      inherits(BufferListStream, DuplexStream);
+      Object.assign(BufferListStream.prototype, BufferList.prototype);
+      BufferListStream.prototype._new = function _new(callback) {
+        return new BufferListStream(callback);
+      };
+      BufferListStream.prototype._write = function _write(buf, encoding, callback) {
+        this._appendBuffer(buf);
+        if (typeof callback === "function") {
+          callback();
+        }
+      };
+      BufferListStream.prototype._read = function _read(size) {
+        if (!this.length) {
+          return this.push(null);
+        }
+        size = Math.min(size, this.length);
+        this.push(this.slice(0, size));
+        this.consume(size);
+      };
+      BufferListStream.prototype.end = function end(chunk) {
+        DuplexStream.prototype.end.call(this, chunk);
+        if (this._callback) {
+          this._callback(null, this.slice());
+          this._callback = null;
+        }
+      };
+      BufferListStream.prototype._destroy = function _destroy(err, cb) {
+        this._bufs.length = 0;
+        this.length = 0;
+        cb(err);
+      };
+      BufferListStream.prototype._isBufferList = function _isBufferList(b) {
+        return b instanceof BufferListStream || b instanceof BufferList || BufferListStream.isBufferList(b);
+      };
+      BufferListStream.isBufferList = BufferList.isBufferList;
+      module.exports = BufferListStream;
+      module.exports.BufferListStream = BufferListStream;
+      module.exports.BufferList = BufferList;
+    }
+  });
+
+  // node_modules/mqtt-packet/packet.js
+  var require_packet = __commonJS({
+    "node_modules/mqtt-packet/packet.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var Packet = class {
+        constructor() {
+          this.cmd = null;
+          this.retain = false;
+          this.qos = 0;
+          this.dup = false;
+          this.length = -1;
+          this.topic = null;
+          this.payload = null;
+        }
+      };
+      module.exports = Packet;
+    }
+  });
+
+  // node_modules/mqtt-packet/constants.js
+  var require_constants = __commonJS({
+    "node_modules/mqtt-packet/constants.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var protocol = module.exports;
+      var { Buffer: Buffer3 } = (init_buffer(), __toCommonJS(buffer_exports));
+      protocol.types = {
+        0: "reserved",
+        1: "connect",
+        2: "connack",
+        3: "publish",
+        4: "puback",
+        5: "pubrec",
+        6: "pubrel",
+        7: "pubcomp",
+        8: "subscribe",
+        9: "suback",
+        10: "unsubscribe",
+        11: "unsuback",
+        12: "pingreq",
+        13: "pingresp",
+        14: "disconnect",
+        15: "auth"
+      };
+      protocol.requiredHeaderFlags = {
+        1: 0,
+        // 'connect'
+        2: 0,
+        // 'connack'
+        4: 0,
+        // 'puback'
+        5: 0,
+        // 'pubrec'
+        6: 2,
+        // 'pubrel'
+        7: 0,
+        // 'pubcomp'
+        8: 2,
+        // 'subscribe'
+        9: 0,
+        // 'suback'
+        10: 2,
+        // 'unsubscribe'
+        11: 0,
+        // 'unsuback'
+        12: 0,
+        // 'pingreq'
+        13: 0,
+        // 'pingresp'
+        14: 0,
+        // 'disconnect'
+        15: 0
+        // 'auth'
+      };
+      protocol.requiredHeaderFlagsErrors = {};
+      for (const k in protocol.requiredHeaderFlags) {
+        const v = protocol.requiredHeaderFlags[k];
+        protocol.requiredHeaderFlagsErrors[k] = "Invalid header flag bits, must be 0x" + v.toString(16) + " for " + protocol.types[k] + " packet";
+      }
+      protocol.codes = {};
+      for (const k in protocol.types) {
+        const v = protocol.types[k];
+        protocol.codes[v] = k;
+      }
+      protocol.CMD_SHIFT = 4;
+      protocol.CMD_MASK = 240;
+      protocol.DUP_MASK = 8;
+      protocol.QOS_MASK = 3;
+      protocol.QOS_SHIFT = 1;
+      protocol.RETAIN_MASK = 1;
+      protocol.VARBYTEINT_MASK = 127;
+      protocol.VARBYTEINT_FIN_MASK = 128;
+      protocol.VARBYTEINT_MAX = 268435455;
+      protocol.SESSIONPRESENT_MASK = 1;
+      protocol.SESSIONPRESENT_HEADER = Buffer3.from([protocol.SESSIONPRESENT_MASK]);
+      protocol.CONNACK_HEADER = Buffer3.from([protocol.codes.connack << protocol.CMD_SHIFT]);
+      protocol.USERNAME_MASK = 128;
+      protocol.PASSWORD_MASK = 64;
+      protocol.WILL_RETAIN_MASK = 32;
+      protocol.WILL_QOS_MASK = 24;
+      protocol.WILL_QOS_SHIFT = 3;
+      protocol.WILL_FLAG_MASK = 4;
+      protocol.CLEAN_SESSION_MASK = 2;
+      protocol.CONNECT_HEADER = Buffer3.from([protocol.codes.connect << protocol.CMD_SHIFT]);
+      protocol.properties = {
+        sessionExpiryInterval: 17,
+        willDelayInterval: 24,
+        receiveMaximum: 33,
+        maximumPacketSize: 39,
+        topicAliasMaximum: 34,
+        requestResponseInformation: 25,
+        requestProblemInformation: 23,
+        userProperties: 38,
+        authenticationMethod: 21,
+        authenticationData: 22,
+        payloadFormatIndicator: 1,
+        messageExpiryInterval: 2,
+        contentType: 3,
+        responseTopic: 8,
+        correlationData: 9,
+        maximumQoS: 36,
+        retainAvailable: 37,
+        assignedClientIdentifier: 18,
+        reasonString: 31,
+        wildcardSubscriptionAvailable: 40,
+        subscriptionIdentifiersAvailable: 41,
+        sharedSubscriptionAvailable: 42,
+        serverKeepAlive: 19,
+        responseInformation: 26,
+        serverReference: 28,
+        topicAlias: 35,
+        subscriptionIdentifier: 11
+      };
+      protocol.propertiesCodes = {};
+      for (const prop in protocol.properties) {
+        const id = protocol.properties[prop];
+        protocol.propertiesCodes[id] = prop;
+      }
+      protocol.propertiesTypes = {
+        sessionExpiryInterval: "int32",
+        willDelayInterval: "int32",
+        receiveMaximum: "int16",
+        maximumPacketSize: "int32",
+        topicAliasMaximum: "int16",
+        requestResponseInformation: "byte",
+        requestProblemInformation: "byte",
+        userProperties: "pair",
+        authenticationMethod: "string",
+        authenticationData: "binary",
+        payloadFormatIndicator: "byte",
+        messageExpiryInterval: "int32",
+        contentType: "string",
+        responseTopic: "string",
+        correlationData: "binary",
+        maximumQoS: "int8",
+        retainAvailable: "byte",
+        assignedClientIdentifier: "string",
+        reasonString: "string",
+        wildcardSubscriptionAvailable: "byte",
+        subscriptionIdentifiersAvailable: "byte",
+        sharedSubscriptionAvailable: "byte",
+        serverKeepAlive: "int16",
+        responseInformation: "string",
+        serverReference: "string",
+        topicAlias: "int16",
+        subscriptionIdentifier: "var"
+      };
+      function genHeader(type) {
+        return [0, 1, 2].map((qos) => {
+          return [0, 1].map((dup) => {
+            return [0, 1].map((retain) => {
+              const buf = Buffer3.alloc(1);
+              buf.writeUInt8(
+                protocol.codes[type] << protocol.CMD_SHIFT | (dup ? protocol.DUP_MASK : 0) | qos << protocol.QOS_SHIFT | retain,
+                0,
+                true
+              );
+              return buf;
+            });
+          });
+        });
+      }
+      protocol.PUBLISH_HEADER = genHeader("publish");
+      protocol.SUBSCRIBE_HEADER = genHeader("subscribe");
+      protocol.SUBSCRIBE_OPTIONS_QOS_MASK = 3;
+      protocol.SUBSCRIBE_OPTIONS_NL_MASK = 1;
+      protocol.SUBSCRIBE_OPTIONS_NL_SHIFT = 2;
+      protocol.SUBSCRIBE_OPTIONS_RAP_MASK = 1;
+      protocol.SUBSCRIBE_OPTIONS_RAP_SHIFT = 3;
+      protocol.SUBSCRIBE_OPTIONS_RH_MASK = 3;
+      protocol.SUBSCRIBE_OPTIONS_RH_SHIFT = 4;
+      protocol.SUBSCRIBE_OPTIONS_RH = [0, 16, 32];
+      protocol.SUBSCRIBE_OPTIONS_NL = 4;
+      protocol.SUBSCRIBE_OPTIONS_RAP = 8;
+      protocol.SUBSCRIBE_OPTIONS_QOS = [0, 1, 2];
+      protocol.UNSUBSCRIBE_HEADER = genHeader("unsubscribe");
+      protocol.ACKS = {
+        unsuback: genHeader("unsuback"),
+        puback: genHeader("puback"),
+        pubcomp: genHeader("pubcomp"),
+        pubrel: genHeader("pubrel"),
+        pubrec: genHeader("pubrec")
+      };
+      protocol.SUBACK_HEADER = Buffer3.from([protocol.codes.suback << protocol.CMD_SHIFT]);
+      protocol.VERSION3 = Buffer3.from([3]);
+      protocol.VERSION4 = Buffer3.from([4]);
+      protocol.VERSION5 = Buffer3.from([5]);
+      protocol.VERSION131 = Buffer3.from([131]);
+      protocol.VERSION132 = Buffer3.from([132]);
+      protocol.QOS = [0, 1, 2].map((qos) => {
+        return Buffer3.from([qos]);
+      });
+      protocol.EMPTY = {
+        pingreq: Buffer3.from([protocol.codes.pingreq << 4, 0]),
+        pingresp: Buffer3.from([protocol.codes.pingresp << 4, 0]),
+        disconnect: Buffer3.from([protocol.codes.disconnect << 4, 0])
+      };
+      protocol.MQTT5_PUBACK_PUBREC_CODES = {
+        0: "Success",
+        16: "No matching subscribers",
+        128: "Unspecified error",
+        131: "Implementation specific error",
+        135: "Not authorized",
+        144: "Topic Name invalid",
+        145: "Packet identifier in use",
+        151: "Quota exceeded",
+        153: "Payload format invalid"
+      };
+      protocol.MQTT5_PUBREL_PUBCOMP_CODES = {
+        0: "Success",
+        146: "Packet Identifier not found"
+      };
+      protocol.MQTT5_SUBACK_CODES = {
+        0: "Granted QoS 0",
+        1: "Granted QoS 1",
+        2: "Granted QoS 2",
+        128: "Unspecified error",
+        131: "Implementation specific error",
+        135: "Not authorized",
+        143: "Topic Filter invalid",
+        145: "Packet Identifier in use",
+        151: "Quota exceeded",
+        158: "Shared Subscriptions not supported",
+        161: "Subscription Identifiers not supported",
+        162: "Wildcard Subscriptions not supported"
+      };
+      protocol.MQTT5_UNSUBACK_CODES = {
+        0: "Success",
+        17: "No subscription existed",
+        128: "Unspecified error",
+        131: "Implementation specific error",
+        135: "Not authorized",
+        143: "Topic Filter invalid",
+        145: "Packet Identifier in use"
+      };
+      protocol.MQTT5_DISCONNECT_CODES = {
+        0: "Normal disconnection",
+        4: "Disconnect with Will Message",
+        128: "Unspecified error",
+        129: "Malformed Packet",
+        130: "Protocol Error",
+        131: "Implementation specific error",
+        135: "Not authorized",
+        137: "Server busy",
+        139: "Server shutting down",
+        141: "Keep Alive timeout",
+        142: "Session taken over",
+        143: "Topic Filter invalid",
+        144: "Topic Name invalid",
+        147: "Receive Maximum exceeded",
+        148: "Topic Alias invalid",
+        149: "Packet too large",
+        150: "Message rate too high",
+        151: "Quota exceeded",
+        152: "Administrative action",
+        153: "Payload format invalid",
+        154: "Retain not supported",
+        155: "QoS not supported",
+        156: "Use another server",
+        157: "Server moved",
+        158: "Shared Subscriptions not supported",
+        159: "Connection rate exceeded",
+        160: "Maximum connect time",
+        161: "Subscription Identifiers not supported",
+        162: "Wildcard Subscriptions not supported"
+      };
+      protocol.MQTT5_AUTH_CODES = {
+        0: "Success",
+        24: "Continue authentication",
+        25: "Re-authenticate"
+      };
+    }
+  });
+
+  // node_modules/ms/index.js
+  var require_ms = __commonJS({
+    "node_modules/ms/index.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var s = 1e3;
+      var m = s * 60;
+      var h = m * 60;
+      var d = h * 24;
+      var w = d * 7;
+      var y = d * 365.25;
+      module.exports = function(val, options) {
+        options = options || {};
+        var type = typeof val;
+        if (type === "string" && val.length > 0) {
+          return parse2(val);
+        } else if (type === "number" && isFinite(val)) {
+          return options.long ? fmtLong(val) : fmtShort(val);
+        }
+        throw new Error(
+          "val is not a non-empty string or a valid number. val=" + JSON.stringify(val)
+        );
+      };
+      function parse2(str) {
+        str = String(str);
+        if (str.length > 100) {
+          return;
+        }
+        var match = /^(-?(?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)?$/i.exec(
+          str
+        );
+        if (!match) {
+          return;
+        }
+        var n = parseFloat(match[1]);
+        var type = (match[2] || "ms").toLowerCase();
+        switch (type) {
+          case "years":
+          case "year":
+          case "yrs":
+          case "yr":
+          case "y":
+            return n * y;
+          case "weeks":
+          case "week":
+          case "w":
+            return n * w;
+          case "days":
+          case "day":
+          case "d":
+            return n * d;
+          case "hours":
+          case "hour":
+          case "hrs":
+          case "hr":
+          case "h":
+            return n * h;
+          case "minutes":
+          case "minute":
+          case "mins":
+          case "min":
+          case "m":
+            return n * m;
+          case "seconds":
+          case "second":
+          case "secs":
+          case "sec":
+          case "s":
+            return n * s;
+          case "milliseconds":
+          case "millisecond":
+          case "msecs":
+          case "msec":
+          case "ms":
+            return n;
+          default:
+            return void 0;
+        }
+      }
+      function fmtShort(ms) {
+        var msAbs = Math.abs(ms);
+        if (msAbs >= d) {
+          return Math.round(ms / d) + "d";
+        }
+        if (msAbs >= h) {
+          return Math.round(ms / h) + "h";
+        }
+        if (msAbs >= m) {
+          return Math.round(ms / m) + "m";
+        }
+        if (msAbs >= s) {
+          return Math.round(ms / s) + "s";
+        }
+        return ms + "ms";
+      }
+      function fmtLong(ms) {
+        var msAbs = Math.abs(ms);
+        if (msAbs >= d) {
+          return plural(ms, msAbs, d, "day");
+        }
+        if (msAbs >= h) {
+          return plural(ms, msAbs, h, "hour");
+        }
+        if (msAbs >= m) {
+          return plural(ms, msAbs, m, "minute");
+        }
+        if (msAbs >= s) {
+          return plural(ms, msAbs, s, "second");
+        }
+        return ms + " ms";
+      }
+      function plural(ms, msAbs, n, name2) {
+        var isPlural = msAbs >= n * 1.5;
+        return Math.round(ms / n) + " " + name2 + (isPlural ? "s" : "");
+      }
+    }
+  });
+
+  // node_modules/debug/src/common.js
+  var require_common = __commonJS({
+    "node_modules/debug/src/common.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      function setup(env3) {
+        createDebug.debug = createDebug;
+        createDebug.default = createDebug;
+        createDebug.coerce = coerce;
+        createDebug.disable = disable;
+        createDebug.enable = enable;
+        createDebug.enabled = enabled;
+        createDebug.humanize = require_ms();
+        createDebug.destroy = destroy;
+        Object.keys(env3).forEach((key) => {
+          createDebug[key] = env3[key];
+        });
+        createDebug.names = [];
+        createDebug.skips = [];
+        createDebug.formatters = {};
+        function selectColor(namespace) {
+          let hash = 0;
+          for (let i = 0; i < namespace.length; i++) {
+            hash = (hash << 5) - hash + namespace.charCodeAt(i);
+            hash |= 0;
+          }
+          return createDebug.colors[Math.abs(hash) % createDebug.colors.length];
+        }
+        createDebug.selectColor = selectColor;
+        function createDebug(namespace) {
+          let prevTime;
+          let enableOverride = null;
+          let namespacesCache;
+          let enabledCache;
+          function debug(...args) {
+            if (!debug.enabled) {
+              return;
+            }
+            const self2 = debug;
+            const curr = Number(/* @__PURE__ */ new Date());
+            const ms = curr - (prevTime || curr);
+            self2.diff = ms;
+            self2.prev = prevTime;
+            self2.curr = curr;
+            prevTime = curr;
+            args[0] = createDebug.coerce(args[0]);
+            if (typeof args[0] !== "string") {
+              args.unshift("%O");
+            }
+            let index = 0;
+            args[0] = args[0].replace(/%([a-zA-Z%])/g, (match, format2) => {
+              if (match === "%%") {
+                return "%";
+              }
+              index++;
+              const formatter = createDebug.formatters[format2];
+              if (typeof formatter === "function") {
+                const val = args[index];
+                match = formatter.call(self2, val);
+                args.splice(index, 1);
+                index--;
+              }
+              return match;
+            });
+            createDebug.formatArgs.call(self2, args);
+            const logFn = self2.log || createDebug.log;
+            logFn.apply(self2, args);
+          }
+          debug.namespace = namespace;
+          debug.useColors = createDebug.useColors();
+          debug.color = createDebug.selectColor(namespace);
+          debug.extend = extend;
+          debug.destroy = createDebug.destroy;
+          Object.defineProperty(debug, "enabled", {
+            enumerable: true,
+            configurable: false,
+            get: () => {
+              if (enableOverride !== null) {
+                return enableOverride;
+              }
+              if (namespacesCache !== createDebug.namespaces) {
+                namespacesCache = createDebug.namespaces;
+                enabledCache = createDebug.enabled(namespace);
+              }
+              return enabledCache;
+            },
+            set: (v) => {
+              enableOverride = v;
+            }
+          });
+          if (typeof createDebug.init === "function") {
+            createDebug.init(debug);
+          }
+          return debug;
+        }
+        function extend(namespace, delimiter) {
+          const newDebug = createDebug(this.namespace + (typeof delimiter === "undefined" ? ":" : delimiter) + namespace);
+          newDebug.log = this.log;
+          return newDebug;
+        }
+        function enable(namespaces) {
+          createDebug.save(namespaces);
+          createDebug.namespaces = namespaces;
+          createDebug.names = [];
+          createDebug.skips = [];
+          const split = (typeof namespaces === "string" ? namespaces : "").trim().replace(/\s+/g, ",").split(",").filter(Boolean);
+          for (const ns of split) {
+            if (ns[0] === "-") {
+              createDebug.skips.push(ns.slice(1));
+            } else {
+              createDebug.names.push(ns);
+            }
+          }
+        }
+        function matchesTemplate(search, template) {
+          let searchIndex = 0;
+          let templateIndex = 0;
+          let starIndex = -1;
+          let matchIndex = 0;
+          while (searchIndex < search.length) {
+            if (templateIndex < template.length && (template[templateIndex] === search[searchIndex] || template[templateIndex] === "*")) {
+              if (template[templateIndex] === "*") {
+                starIndex = templateIndex;
+                matchIndex = searchIndex;
+                templateIndex++;
+              } else {
+                searchIndex++;
+                templateIndex++;
+              }
+            } else if (starIndex !== -1) {
+              templateIndex = starIndex + 1;
+              matchIndex++;
+              searchIndex = matchIndex;
+            } else {
+              return false;
+            }
+          }
+          while (templateIndex < template.length && template[templateIndex] === "*") {
+            templateIndex++;
+          }
+          return templateIndex === template.length;
+        }
+        function disable() {
+          const namespaces = [
+            ...createDebug.names,
+            ...createDebug.skips.map((namespace) => "-" + namespace)
+          ].join(",");
+          createDebug.enable("");
+          return namespaces;
+        }
+        function enabled(name2) {
+          for (const skip of createDebug.skips) {
+            if (matchesTemplate(name2, skip)) {
+              return false;
+            }
+          }
+          for (const ns of createDebug.names) {
+            if (matchesTemplate(name2, ns)) {
+              return true;
+            }
+          }
+          return false;
+        }
+        function coerce(val) {
+          if (val instanceof Error) {
+            return val.stack || val.message;
+          }
+          return val;
+        }
+        function destroy() {
+          console.warn("Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.");
+        }
+        createDebug.enable(createDebug.load());
+        return createDebug;
+      }
+      module.exports = setup;
+    }
+  });
+
+  // node_modules/debug/src/browser.js
+  var require_browser4 = __commonJS({
+    "node_modules/debug/src/browser.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      exports8.formatArgs = formatArgs;
+      exports8.save = save;
+      exports8.load = load;
+      exports8.useColors = useColors;
+      exports8.storage = localstorage();
+      exports8.destroy = /* @__PURE__ */ (() => {
+        let warned = false;
+        return () => {
+          if (!warned) {
+            warned = true;
+            console.warn("Instance method `debug.destroy()` is deprecated and no longer does anything. It will be removed in the next major version of `debug`.");
+          }
+        };
+      })();
+      exports8.colors = [
+        "#0000CC",
+        "#0000FF",
+        "#0033CC",
+        "#0033FF",
+        "#0066CC",
+        "#0066FF",
+        "#0099CC",
+        "#0099FF",
+        "#00CC00",
+        "#00CC33",
+        "#00CC66",
+        "#00CC99",
+        "#00CCCC",
+        "#00CCFF",
+        "#3300CC",
+        "#3300FF",
+        "#3333CC",
+        "#3333FF",
+        "#3366CC",
+        "#3366FF",
+        "#3399CC",
+        "#3399FF",
+        "#33CC00",
+        "#33CC33",
+        "#33CC66",
+        "#33CC99",
+        "#33CCCC",
+        "#33CCFF",
+        "#6600CC",
+        "#6600FF",
+        "#6633CC",
+        "#6633FF",
+        "#66CC00",
+        "#66CC33",
+        "#9900CC",
+        "#9900FF",
+        "#9933CC",
+        "#9933FF",
+        "#99CC00",
+        "#99CC33",
+        "#CC0000",
+        "#CC0033",
+        "#CC0066",
+        "#CC0099",
+        "#CC00CC",
+        "#CC00FF",
+        "#CC3300",
+        "#CC3333",
+        "#CC3366",
+        "#CC3399",
+        "#CC33CC",
+        "#CC33FF",
+        "#CC6600",
+        "#CC6633",
+        "#CC9900",
+        "#CC9933",
+        "#CCCC00",
+        "#CCCC33",
+        "#FF0000",
+        "#FF0033",
+        "#FF0066",
+        "#FF0099",
+        "#FF00CC",
+        "#FF00FF",
+        "#FF3300",
+        "#FF3333",
+        "#FF3366",
+        "#FF3399",
+        "#FF33CC",
+        "#FF33FF",
+        "#FF6600",
+        "#FF6633",
+        "#FF9900",
+        "#FF9933",
+        "#FFCC00",
+        "#FFCC33"
+      ];
+      function useColors() {
+        if (typeof window !== "undefined" && window.process && (window.process.type === "renderer" || window.process.__nwjs)) {
+          return true;
+        }
+        if (typeof navigator !== "undefined" && navigator.userAgent && navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/)) {
+          return false;
+        }
+        let m;
+        return typeof document !== "undefined" && document.documentElement && document.documentElement.style && document.documentElement.style.WebkitAppearance || // Is firebug? http://stackoverflow.com/a/398120/376773
+        typeof window !== "undefined" && window.console && (window.console.firebug || window.console.exception && window.console.table) || // Is firefox >= v31?
+        // https://developer.mozilla.org/en-US/docs/Tools/Web_Console#Styling_messages
+        typeof navigator !== "undefined" && navigator.userAgent && (m = navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/)) && parseInt(m[1], 10) >= 31 || // Double check webkit in userAgent just in case we are in a worker
+        typeof navigator !== "undefined" && navigator.userAgent && navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/);
+      }
+      function formatArgs(args) {
+        args[0] = (this.useColors ? "%c" : "") + this.namespace + (this.useColors ? " %c" : " ") + args[0] + (this.useColors ? "%c " : " ") + "+" + module.exports.humanize(this.diff);
+        if (!this.useColors) {
+          return;
+        }
+        const c = "color: " + this.color;
+        args.splice(1, 0, c, "color: inherit");
+        let index = 0;
+        let lastC = 0;
+        args[0].replace(/%[a-zA-Z%]/g, (match) => {
+          if (match === "%%") {
+            return;
+          }
+          index++;
+          if (match === "%c") {
+            lastC = index;
+          }
+        });
+        args.splice(lastC, 0, c);
+      }
+      exports8.log = console.debug || console.log || (() => {
+      });
+      function save(namespaces) {
+        try {
+          if (namespaces) {
+            exports8.storage.setItem("debug", namespaces);
+          } else {
+            exports8.storage.removeItem("debug");
+          }
+        } catch (error) {
+        }
+      }
+      function load() {
+        let r;
+        try {
+          r = exports8.storage.getItem("debug") || exports8.storage.getItem("DEBUG");
+        } catch (error) {
+        }
+        if (!r && typeof process_exports !== "undefined" && "env" in process_exports) {
+          r = process_exports.env.DEBUG;
+        }
+        return r;
+      }
+      function localstorage() {
+        try {
+          return localStorage;
+        } catch (error) {
+        }
+      }
+      module.exports = require_common()(exports8);
+      var { formatters } = module.exports;
+      formatters.j = function(v) {
+        try {
+          return JSON.stringify(v);
+        } catch (error) {
+          return "[UnexpectedJSONParseError]: " + error.message;
+        }
+      };
+    }
+  });
+
+  // node_modules/mqtt-packet/parser.js
+  var require_parser = __commonJS({
+    "node_modules/mqtt-packet/parser.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var bl = require_bl();
+      var { EventEmitter: EventEmitter2 } = (init_events(), __toCommonJS(events_exports));
+      var Packet = require_packet();
+      var constants = require_constants();
+      var debug = require_browser4()("mqtt-packet:parser");
+      var Parser = class _Parser extends EventEmitter2 {
+        constructor() {
+          super();
+          this.parser = this.constructor.parser;
+        }
+        static parser(opt) {
+          if (!(this instanceof _Parser)) return new _Parser().parser(opt);
+          this.settings = opt || {};
+          this._states = [
+            "_parseHeader",
+            "_parseLength",
+            "_parsePayload",
+            "_newPacket"
+          ];
+          this._resetState();
+          return this;
+        }
+        _resetState() {
+          debug("_resetState: resetting packet, error, _list, and _stateCounter");
+          this.packet = new Packet();
+          this.error = null;
+          this._list = bl();
+          this._stateCounter = 0;
+        }
+        parse(buf) {
+          if (this.error) this._resetState();
+          this._list.append(buf);
+          debug("parse: current state: %s", this._states[this._stateCounter]);
+          while ((this.packet.length !== -1 || this._list.length > 0) && this[this._states[this._stateCounter]]() && !this.error) {
+            this._stateCounter++;
+            debug("parse: state complete. _stateCounter is now: %d", this._stateCounter);
+            debug("parse: packet.length: %d, buffer list length: %d", this.packet.length, this._list.length);
+            if (this._stateCounter >= this._states.length) this._stateCounter = 0;
+          }
+          debug("parse: exited while loop. packet: %d, buffer list length: %d", this.packet.length, this._list.length);
+          return this._list.length;
+        }
+        _parseHeader() {
+          const zero = this._list.readUInt8(0);
+          const cmdIndex = zero >> constants.CMD_SHIFT;
+          this.packet.cmd = constants.types[cmdIndex];
+          const headerFlags = zero & 15;
+          const requiredHeaderFlags = constants.requiredHeaderFlags[cmdIndex];
+          if (requiredHeaderFlags != null && headerFlags !== requiredHeaderFlags) {
+            return this._emitError(new Error(constants.requiredHeaderFlagsErrors[cmdIndex]));
+          }
+          this.packet.retain = (zero & constants.RETAIN_MASK) !== 0;
+          this.packet.qos = zero >> constants.QOS_SHIFT & constants.QOS_MASK;
+          if (this.packet.qos > 2) {
+            return this._emitError(new Error("Packet must not have both QoS bits set to 1"));
+          }
+          this.packet.dup = (zero & constants.DUP_MASK) !== 0;
+          debug("_parseHeader: packet: %o", this.packet);
+          this._list.consume(1);
+          return true;
+        }
+        _parseLength() {
+          const result = this._parseVarByteNum(true);
+          if (result) {
+            this.packet.length = result.value;
+            this._list.consume(result.bytes);
+          }
+          debug("_parseLength %d", result.value);
+          return !!result;
+        }
+        _parsePayload() {
+          debug("_parsePayload: payload %O", this._list);
+          let result = false;
+          if (this.packet.length === 0 || this._list.length >= this.packet.length) {
+            this._pos = 0;
+            switch (this.packet.cmd) {
+              case "connect":
+                this._parseConnect();
+                break;
+              case "connack":
+                this._parseConnack();
+                break;
+              case "publish":
+                this._parsePublish();
+                break;
+              case "puback":
+              case "pubrec":
+              case "pubrel":
+              case "pubcomp":
+                this._parseConfirmation();
+                break;
+              case "subscribe":
+                this._parseSubscribe();
+                break;
+              case "suback":
+                this._parseSuback();
+                break;
+              case "unsubscribe":
+                this._parseUnsubscribe();
+                break;
+              case "unsuback":
+                this._parseUnsuback();
+                break;
+              case "pingreq":
+              case "pingresp":
+                break;
+              case "disconnect":
+                this._parseDisconnect();
+                break;
+              case "auth":
+                this._parseAuth();
+                break;
+              default:
+                this._emitError(new Error("Not supported"));
+            }
+            result = true;
+          }
+          debug("_parsePayload complete result: %s", result);
+          return result;
+        }
+        _parseConnect() {
+          debug("_parseConnect");
+          let topic;
+          let payload;
+          let password;
+          let username;
+          const flags = {};
+          const packet = this.packet;
+          const protocolId = this._parseString();
+          if (protocolId === null) return this._emitError(new Error("Cannot parse protocolId"));
+          if (protocolId !== "MQTT" && protocolId !== "MQIsdp") {
+            return this._emitError(new Error("Invalid protocolId"));
+          }
+          packet.protocolId = protocolId;
+          if (this._pos >= this._list.length) return this._emitError(new Error("Packet too short"));
+          packet.protocolVersion = this._list.readUInt8(this._pos);
+          if (packet.protocolVersion >= 128) {
+            packet.bridgeMode = true;
+            packet.protocolVersion = packet.protocolVersion - 128;
+          }
+          if (packet.protocolVersion !== 3 && packet.protocolVersion !== 4 && packet.protocolVersion !== 5) {
+            return this._emitError(new Error("Invalid protocol version"));
+          }
+          this._pos++;
+          if (this._pos >= this._list.length) {
+            return this._emitError(new Error("Packet too short"));
+          }
+          if (this._list.readUInt8(this._pos) & 1) {
+            return this._emitError(new Error("Connect flag bit 0 must be 0, but got 1"));
+          }
+          flags.username = this._list.readUInt8(this._pos) & constants.USERNAME_MASK;
+          flags.password = this._list.readUInt8(this._pos) & constants.PASSWORD_MASK;
+          flags.will = this._list.readUInt8(this._pos) & constants.WILL_FLAG_MASK;
+          const willRetain = !!(this._list.readUInt8(this._pos) & constants.WILL_RETAIN_MASK);
+          const willQos = (this._list.readUInt8(this._pos) & constants.WILL_QOS_MASK) >> constants.WILL_QOS_SHIFT;
+          if (flags.will) {
+            packet.will = {};
+            packet.will.retain = willRetain;
+            packet.will.qos = willQos;
+          } else {
+            if (willRetain) {
+              return this._emitError(new Error("Will Retain Flag must be set to zero when Will Flag is set to 0"));
+            }
+            if (willQos) {
+              return this._emitError(new Error("Will QoS must be set to zero when Will Flag is set to 0"));
+            }
+          }
+          packet.clean = (this._list.readUInt8(this._pos) & constants.CLEAN_SESSION_MASK) !== 0;
+          this._pos++;
+          packet.keepalive = this._parseNum();
+          if (packet.keepalive === -1) return this._emitError(new Error("Packet too short"));
+          if (packet.protocolVersion === 5) {
+            const properties = this._parseProperties();
+            if (Object.getOwnPropertyNames(properties).length) {
+              packet.properties = properties;
+            }
+          }
+          const clientId = this._parseString();
+          if (clientId === null) return this._emitError(new Error("Packet too short"));
+          packet.clientId = clientId;
+          debug("_parseConnect: packet.clientId: %s", packet.clientId);
+          if (flags.will) {
+            if (packet.protocolVersion === 5) {
+              const willProperties = this._parseProperties();
+              if (Object.getOwnPropertyNames(willProperties).length) {
+                packet.will.properties = willProperties;
+              }
+            }
+            topic = this._parseString();
+            if (topic === null) return this._emitError(new Error("Cannot parse will topic"));
+            packet.will.topic = topic;
+            debug("_parseConnect: packet.will.topic: %s", packet.will.topic);
+            payload = this._parseBuffer();
+            if (payload === null) return this._emitError(new Error("Cannot parse will payload"));
+            packet.will.payload = payload;
+            debug("_parseConnect: packet.will.paylaod: %s", packet.will.payload);
+          }
+          if (flags.username) {
+            username = this._parseString();
+            if (username === null) return this._emitError(new Error("Cannot parse username"));
+            packet.username = username;
+            debug("_parseConnect: packet.username: %s", packet.username);
+          }
+          if (flags.password) {
+            password = this._parseBuffer();
+            if (password === null) return this._emitError(new Error("Cannot parse password"));
+            packet.password = password;
+          }
+          this.settings = packet;
+          debug("_parseConnect: complete");
+          return packet;
+        }
+        _parseConnack() {
+          debug("_parseConnack");
+          const packet = this.packet;
+          if (this._list.length < 1) return null;
+          const flags = this._list.readUInt8(this._pos++);
+          if (flags > 1) {
+            return this._emitError(new Error("Invalid connack flags, bits 7-1 must be set to 0"));
+          }
+          packet.sessionPresent = !!(flags & constants.SESSIONPRESENT_MASK);
+          if (this.settings.protocolVersion === 5) {
+            if (this._list.length >= 2) {
+              packet.reasonCode = this._list.readUInt8(this._pos++);
+            } else {
+              packet.reasonCode = 0;
+            }
+          } else {
+            if (this._list.length < 2) return null;
+            packet.returnCode = this._list.readUInt8(this._pos++);
+          }
+          if (packet.returnCode === -1 || packet.reasonCode === -1) return this._emitError(new Error("Cannot parse return code"));
+          if (this.settings.protocolVersion === 5) {
+            const properties = this._parseProperties();
+            if (Object.getOwnPropertyNames(properties).length) {
+              packet.properties = properties;
+            }
+          }
+          debug("_parseConnack: complete");
+        }
+        _parsePublish() {
+          debug("_parsePublish");
+          const packet = this.packet;
+          packet.topic = this._parseString();
+          if (packet.topic === null) return this._emitError(new Error("Cannot parse topic"));
+          if (packet.qos > 0) {
+            if (!this._parseMessageId()) {
+              return;
+            }
+          }
+          if (this.settings.protocolVersion === 5) {
+            const properties = this._parseProperties();
+            if (Object.getOwnPropertyNames(properties).length) {
+              packet.properties = properties;
+            }
+          }
+          packet.payload = this._list.slice(this._pos, packet.length);
+          debug("_parsePublish: payload from buffer list: %o", packet.payload);
+        }
+        _parseSubscribe() {
+          debug("_parseSubscribe");
+          const packet = this.packet;
+          let topic;
+          let options;
+          let qos;
+          let rh;
+          let rap;
+          let nl;
+          let subscription;
+          packet.subscriptions = [];
+          if (!this._parseMessageId()) {
+            return;
+          }
+          if (this.settings.protocolVersion === 5) {
+            const properties = this._parseProperties();
+            if (Object.getOwnPropertyNames(properties).length) {
+              packet.properties = properties;
+            }
+          }
+          if (packet.length <= 0) {
+            return this._emitError(new Error("Malformed subscribe, no payload specified"));
+          }
+          while (this._pos < packet.length) {
+            topic = this._parseString();
+            if (topic === null) return this._emitError(new Error("Cannot parse topic"));
+            if (this._pos >= packet.length) return this._emitError(new Error("Malformed Subscribe Payload"));
+            options = this._parseByte();
+            if (this.settings.protocolVersion === 5) {
+              if (options & 192) {
+                return this._emitError(new Error("Invalid subscribe topic flag bits, bits 7-6 must be 0"));
+              }
+            } else {
+              if (options & 252) {
+                return this._emitError(new Error("Invalid subscribe topic flag bits, bits 7-2 must be 0"));
+              }
+            }
+            qos = options & constants.SUBSCRIBE_OPTIONS_QOS_MASK;
+            if (qos > 2) {
+              return this._emitError(new Error("Invalid subscribe QoS, must be <= 2"));
+            }
+            nl = (options >> constants.SUBSCRIBE_OPTIONS_NL_SHIFT & constants.SUBSCRIBE_OPTIONS_NL_MASK) !== 0;
+            rap = (options >> constants.SUBSCRIBE_OPTIONS_RAP_SHIFT & constants.SUBSCRIBE_OPTIONS_RAP_MASK) !== 0;
+            rh = options >> constants.SUBSCRIBE_OPTIONS_RH_SHIFT & constants.SUBSCRIBE_OPTIONS_RH_MASK;
+            if (rh > 2) {
+              return this._emitError(new Error("Invalid retain handling, must be <= 2"));
+            }
+            subscription = { topic, qos };
+            if (this.settings.protocolVersion === 5) {
+              subscription.nl = nl;
+              subscription.rap = rap;
+              subscription.rh = rh;
+            } else if (this.settings.bridgeMode) {
+              subscription.rh = 0;
+              subscription.rap = true;
+              subscription.nl = true;
+            }
+            debug("_parseSubscribe: push subscription `%s` to subscription", subscription);
+            packet.subscriptions.push(subscription);
+          }
+        }
+        _parseSuback() {
+          debug("_parseSuback");
+          const packet = this.packet;
+          this.packet.granted = [];
+          if (!this._parseMessageId()) {
+            return;
+          }
+          if (this.settings.protocolVersion === 5) {
+            const properties = this._parseProperties();
+            if (Object.getOwnPropertyNames(properties).length) {
+              packet.properties = properties;
+            }
+          }
+          if (packet.length <= 0) {
+            return this._emitError(new Error("Malformed suback, no payload specified"));
+          }
+          while (this._pos < this.packet.length) {
+            const code = this._list.readUInt8(this._pos++);
+            if (this.settings.protocolVersion === 5) {
+              if (!constants.MQTT5_SUBACK_CODES[code]) {
+                return this._emitError(new Error("Invalid suback code"));
+              }
+            } else {
+              if (code > 2 && code !== 128) {
+                return this._emitError(new Error("Invalid suback QoS, must be 0, 1, 2 or 128"));
+              }
+            }
+            this.packet.granted.push(code);
+          }
+        }
+        _parseUnsubscribe() {
+          debug("_parseUnsubscribe");
+          const packet = this.packet;
+          packet.unsubscriptions = [];
+          if (!this._parseMessageId()) {
+            return;
+          }
+          if (this.settings.protocolVersion === 5) {
+            const properties = this._parseProperties();
+            if (Object.getOwnPropertyNames(properties).length) {
+              packet.properties = properties;
+            }
+          }
+          if (packet.length <= 0) {
+            return this._emitError(new Error("Malformed unsubscribe, no payload specified"));
+          }
+          while (this._pos < packet.length) {
+            const topic = this._parseString();
+            if (topic === null) return this._emitError(new Error("Cannot parse topic"));
+            debug("_parseUnsubscribe: push topic `%s` to unsubscriptions", topic);
+            packet.unsubscriptions.push(topic);
+          }
+        }
+        _parseUnsuback() {
+          debug("_parseUnsuback");
+          const packet = this.packet;
+          if (!this._parseMessageId()) return this._emitError(new Error("Cannot parse messageId"));
+          if ((this.settings.protocolVersion === 3 || this.settings.protocolVersion === 4) && packet.length !== 2) {
+            return this._emitError(new Error("Malformed unsuback, payload length must be 2"));
+          }
+          if (packet.length <= 0) {
+            return this._emitError(new Error("Malformed unsuback, no payload specified"));
+          }
+          if (this.settings.protocolVersion === 5) {
+            const properties = this._parseProperties();
+            if (Object.getOwnPropertyNames(properties).length) {
+              packet.properties = properties;
+            }
+            packet.granted = [];
+            while (this._pos < this.packet.length) {
+              const code = this._list.readUInt8(this._pos++);
+              if (!constants.MQTT5_UNSUBACK_CODES[code]) {
+                return this._emitError(new Error("Invalid unsuback code"));
+              }
+              this.packet.granted.push(code);
+            }
+          }
+        }
+        // parse packets like puback, pubrec, pubrel, pubcomp
+        _parseConfirmation() {
+          debug("_parseConfirmation: packet.cmd: `%s`", this.packet.cmd);
+          const packet = this.packet;
+          this._parseMessageId();
+          if (this.settings.protocolVersion === 5) {
+            if (packet.length > 2) {
+              packet.reasonCode = this._parseByte();
+              switch (this.packet.cmd) {
+                case "puback":
+                case "pubrec":
+                  if (!constants.MQTT5_PUBACK_PUBREC_CODES[packet.reasonCode]) {
+                    return this._emitError(new Error("Invalid " + this.packet.cmd + " reason code"));
+                  }
+                  break;
+                case "pubrel":
+                case "pubcomp":
+                  if (!constants.MQTT5_PUBREL_PUBCOMP_CODES[packet.reasonCode]) {
+                    return this._emitError(new Error("Invalid " + this.packet.cmd + " reason code"));
+                  }
+                  break;
+              }
+              debug("_parseConfirmation: packet.reasonCode `%d`", packet.reasonCode);
+            } else {
+              packet.reasonCode = 0;
+            }
+            if (packet.length > 3) {
+              const properties = this._parseProperties();
+              if (Object.getOwnPropertyNames(properties).length) {
+                packet.properties = properties;
+              }
+            }
+          }
+          return true;
+        }
+        // parse disconnect packet
+        _parseDisconnect() {
+          const packet = this.packet;
+          debug("_parseDisconnect");
+          if (this.settings.protocolVersion === 5) {
+            if (this._list.length > 0) {
+              packet.reasonCode = this._parseByte();
+              if (!constants.MQTT5_DISCONNECT_CODES[packet.reasonCode]) {
+                this._emitError(new Error("Invalid disconnect reason code"));
+              }
+            } else {
+              packet.reasonCode = 0;
+            }
+            const properties = this._parseProperties();
+            if (Object.getOwnPropertyNames(properties).length) {
+              packet.properties = properties;
+            }
+          }
+          debug("_parseDisconnect result: true");
+          return true;
+        }
+        // parse auth packet
+        _parseAuth() {
+          debug("_parseAuth");
+          const packet = this.packet;
+          if (this.settings.protocolVersion !== 5) {
+            return this._emitError(new Error("Not supported auth packet for this version MQTT"));
+          }
+          packet.reasonCode = this._parseByte();
+          if (!constants.MQTT5_AUTH_CODES[packet.reasonCode]) {
+            return this._emitError(new Error("Invalid auth reason code"));
+          }
+          const properties = this._parseProperties();
+          if (Object.getOwnPropertyNames(properties).length) {
+            packet.properties = properties;
+          }
+          debug("_parseAuth: result: true");
+          return true;
+        }
+        _parseMessageId() {
+          const packet = this.packet;
+          packet.messageId = this._parseNum();
+          if (packet.messageId === null) {
+            this._emitError(new Error("Cannot parse messageId"));
+            return false;
+          }
+          debug("_parseMessageId: packet.messageId %d", packet.messageId);
+          return true;
+        }
+        _parseString(maybeBuffer) {
+          const length = this._parseNum();
+          const end = length + this._pos;
+          if (length === -1 || end > this._list.length || end > this.packet.length) return null;
+          const result = this._list.toString("utf8", this._pos, end);
+          this._pos += length;
+          debug("_parseString: result: %s", result);
+          return result;
+        }
+        _parseStringPair() {
+          debug("_parseStringPair");
+          return {
+            name: this._parseString(),
+            value: this._parseString()
+          };
+        }
+        _parseBuffer() {
+          const length = this._parseNum();
+          const end = length + this._pos;
+          if (length === -1 || end > this._list.length || end > this.packet.length) return null;
+          const result = this._list.slice(this._pos, end);
+          this._pos += length;
+          debug("_parseBuffer: result: %o", result);
+          return result;
+        }
+        _parseNum() {
+          if (this._list.length - this._pos < 2) return -1;
+          const result = this._list.readUInt16BE(this._pos);
+          this._pos += 2;
+          debug("_parseNum: result: %s", result);
+          return result;
+        }
+        _parse4ByteNum() {
+          if (this._list.length - this._pos < 4) return -1;
+          const result = this._list.readUInt32BE(this._pos);
+          this._pos += 4;
+          debug("_parse4ByteNum: result: %s", result);
+          return result;
+        }
+        _parseVarByteNum(fullInfoFlag) {
+          debug("_parseVarByteNum");
+          const maxBytes = 4;
+          let bytes = 0;
+          let mul = 1;
+          let value = 0;
+          let result = false;
+          let current;
+          const padding = this._pos ? this._pos : 0;
+          while (bytes < maxBytes && padding + bytes < this._list.length) {
+            current = this._list.readUInt8(padding + bytes++);
+            value += mul * (current & constants.VARBYTEINT_MASK);
+            mul *= 128;
+            if ((current & constants.VARBYTEINT_FIN_MASK) === 0) {
+              result = true;
+              break;
+            }
+            if (this._list.length <= bytes) {
+              break;
+            }
+          }
+          if (!result && bytes === maxBytes && this._list.length >= bytes) {
+            this._emitError(new Error("Invalid variable byte integer"));
+          }
+          if (padding) {
+            this._pos += bytes;
+          }
+          if (result) {
+            if (fullInfoFlag) {
+              result = { bytes, value };
+            } else {
+              result = value;
+            }
+          } else {
+            result = false;
+          }
+          debug("_parseVarByteNum: result: %o", result);
+          return result;
+        }
+        _parseByte() {
+          let result;
+          if (this._pos < this._list.length) {
+            result = this._list.readUInt8(this._pos);
+            this._pos++;
+          }
+          debug("_parseByte: result: %o", result);
+          return result;
+        }
+        _parseByType(type) {
+          debug("_parseByType: type: %s", type);
+          switch (type) {
+            case "byte": {
+              return this._parseByte() !== 0;
+            }
+            case "int8": {
+              return this._parseByte();
+            }
+            case "int16": {
+              return this._parseNum();
+            }
+            case "int32": {
+              return this._parse4ByteNum();
+            }
+            case "var": {
+              return this._parseVarByteNum();
+            }
+            case "string": {
+              return this._parseString();
+            }
+            case "pair": {
+              return this._parseStringPair();
+            }
+            case "binary": {
+              return this._parseBuffer();
+            }
+          }
+        }
+        _parseProperties() {
+          debug("_parseProperties");
+          const length = this._parseVarByteNum();
+          const start = this._pos;
+          const end = start + length;
+          const result = {};
+          while (this._pos < end) {
+            const type = this._parseByte();
+            if (!type) {
+              this._emitError(new Error("Cannot parse property code type"));
+              return false;
+            }
+            const name2 = constants.propertiesCodes[type];
+            if (!name2) {
+              this._emitError(new Error("Unknown property"));
+              return false;
+            }
+            if (name2 === "userProperties") {
+              if (!result[name2]) {
+                result[name2] = /* @__PURE__ */ Object.create(null);
+              }
+              const currentUserProperty = this._parseByType(constants.propertiesTypes[name2]);
+              if (result[name2][currentUserProperty.name]) {
+                if (Array.isArray(result[name2][currentUserProperty.name])) {
+                  result[name2][currentUserProperty.name].push(currentUserProperty.value);
+                } else {
+                  const currentValue = result[name2][currentUserProperty.name];
+                  result[name2][currentUserProperty.name] = [currentValue];
+                  result[name2][currentUserProperty.name].push(currentUserProperty.value);
+                }
+              } else {
+                result[name2][currentUserProperty.name] = currentUserProperty.value;
+              }
+              continue;
+            }
+            if (result[name2]) {
+              if (Array.isArray(result[name2])) {
+                result[name2].push(this._parseByType(constants.propertiesTypes[name2]));
+              } else {
+                result[name2] = [result[name2]];
+                result[name2].push(this._parseByType(constants.propertiesTypes[name2]));
+              }
+            } else {
+              result[name2] = this._parseByType(constants.propertiesTypes[name2]);
+            }
+          }
+          return result;
+        }
+        _newPacket() {
+          debug("_newPacket");
+          if (this.packet) {
+            this._list.consume(this.packet.length);
+            debug("_newPacket: parser emit packet: packet.cmd: %s, packet.payload: %s, packet.length: %d", this.packet.cmd, this.packet.payload, this.packet.length);
+            this.emit("packet", this.packet);
+          }
+          debug("_newPacket: new packet");
+          this.packet = new Packet();
+          this._pos = 0;
+          return true;
+        }
+        _emitError(err) {
+          debug("_emitError", err);
+          this.error = err;
+          this.emit("error", err);
+        }
+      };
+      module.exports = Parser;
+    }
+  });
+
+  // node_modules/mqtt-packet/numbers.js
+  var require_numbers = __commonJS({
+    "node_modules/mqtt-packet/numbers.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var { Buffer: Buffer3 } = (init_buffer(), __toCommonJS(buffer_exports));
+      var max = 65536;
+      var cache = {};
+      var SubOk = Buffer3.isBuffer(Buffer3.from([1, 2]).subarray(0, 1));
+      function generateBuffer(i) {
+        const buffer = Buffer3.allocUnsafe(2);
+        buffer.writeUInt8(i >> 8, 0);
+        buffer.writeUInt8(i & 255, 0 + 1);
+        return buffer;
+      }
+      function generateCache() {
+        for (let i = 0; i < max; i++) {
+          cache[i] = generateBuffer(i);
+        }
+      }
+      function genBufVariableByteInt(num) {
+        const maxLength = 4;
+        let digit = 0;
+        let pos = 0;
+        const buffer = Buffer3.allocUnsafe(maxLength);
+        do {
+          digit = num % 128 | 0;
+          num = num / 128 | 0;
+          if (num > 0) digit = digit | 128;
+          buffer.writeUInt8(digit, pos++);
+        } while (num > 0 && pos < maxLength);
+        if (num > 0) {
+          pos = 0;
+        }
+        return SubOk ? buffer.subarray(0, pos) : buffer.slice(0, pos);
+      }
+      function generate4ByteBuffer(num) {
+        const buffer = Buffer3.allocUnsafe(4);
+        buffer.writeUInt32BE(num, 0);
+        return buffer;
+      }
+      module.exports = {
+        cache,
+        generateCache,
+        generateNumber: generateBuffer,
+        genBufVariableByteInt,
+        generate4ByteBuffer
+      };
+    }
+  });
+
+  // node_modules/process-nextick-args/index.js
+  var require_process_nextick_args = __commonJS({
+    "node_modules/process-nextick-args/index.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      if (typeof process_exports === "undefined" || !process_exports.version || process_exports.version.indexOf("v0.") === 0 || process_exports.version.indexOf("v1.") === 0 && process_exports.version.indexOf("v1.8.") !== 0) {
+        module.exports = { nextTick: nextTick3 };
+      } else {
+        module.exports = process_exports;
+      }
+      function nextTick3(fn, arg1, arg2, arg3) {
+        if (typeof fn !== "function") {
+          throw new TypeError('"callback" argument must be a function');
+        }
+        var len = arguments.length;
+        var args, i;
+        switch (len) {
+          case 0:
+          case 1:
+            return process_exports.nextTick(fn);
+          case 2:
+            return process_exports.nextTick(function afterTickOne() {
+              fn.call(null, arg1);
+            });
+          case 3:
+            return process_exports.nextTick(function afterTickTwo() {
+              fn.call(null, arg1, arg2);
+            });
+          case 4:
+            return process_exports.nextTick(function afterTickThree() {
+              fn.call(null, arg1, arg2, arg3);
+            });
+          default:
+            args = new Array(len - 1);
+            i = 0;
+            while (i < args.length) {
+              args[i++] = arguments[i];
+            }
+            return process_exports.nextTick(function afterTick() {
+              fn.apply(null, args);
+            });
+        }
+      }
+    }
+  });
+
+  // node_modules/mqtt-packet/writeToStream.js
+  var require_writeToStream = __commonJS({
+    "node_modules/mqtt-packet/writeToStream.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var protocol = require_constants();
+      var { Buffer: Buffer3 } = (init_buffer(), __toCommonJS(buffer_exports));
+      var empty2 = Buffer3.allocUnsafe(0);
+      var zeroBuf = Buffer3.from([0]);
+      var numbers = require_numbers();
+      var nextTick3 = require_process_nextick_args().nextTick;
+      var debug = require_browser4()("mqtt-packet:writeToStream");
+      var numCache = numbers.cache;
+      var generateNumber = numbers.generateNumber;
+      var generateCache = numbers.generateCache;
+      var genBufVariableByteInt = numbers.genBufVariableByteInt;
+      var generate4ByteBuffer = numbers.generate4ByteBuffer;
+      var writeNumber = writeNumberCached;
+      var toGenerate = true;
+      function generate(packet, stream, opts) {
+        debug("generate called");
+        if (stream.cork) {
+          stream.cork();
+          nextTick3(uncork, stream);
+        }
+        if (toGenerate) {
+          toGenerate = false;
+          generateCache();
+        }
+        debug("generate: packet.cmd: %s", packet.cmd);
+        switch (packet.cmd) {
+          case "connect":
+            return connect(packet, stream, opts);
+          case "connack":
+            return connack(packet, stream, opts);
+          case "publish":
+            return publish(packet, stream, opts);
+          case "puback":
+          case "pubrec":
+          case "pubrel":
+          case "pubcomp":
+            return confirmation(packet, stream, opts);
+          case "subscribe":
+            return subscribe(packet, stream, opts);
+          case "suback":
+            return suback(packet, stream, opts);
+          case "unsubscribe":
+            return unsubscribe(packet, stream, opts);
+          case "unsuback":
+            return unsuback(packet, stream, opts);
+          case "pingreq":
+          case "pingresp":
+            return emptyPacket(packet, stream, opts);
+          case "disconnect":
+            return disconnect(packet, stream, opts);
+          case "auth":
+            return auth(packet, stream, opts);
+          default:
+            stream.destroy(new Error("Unknown command"));
+            return false;
+        }
+      }
+      Object.defineProperty(generate, "cacheNumbers", {
+        get() {
+          return writeNumber === writeNumberCached;
+        },
+        set(value) {
+          if (value) {
+            if (!numCache || Object.keys(numCache).length === 0) toGenerate = true;
+            writeNumber = writeNumberCached;
+          } else {
+            toGenerate = false;
+            writeNumber = writeNumberGenerated;
+          }
+        }
+      });
+      function uncork(stream) {
+        stream.uncork();
+      }
+      function connect(packet, stream, opts) {
+        const settings = packet || {};
+        const protocolId = settings.protocolId || "MQTT";
+        let protocolVersion = settings.protocolVersion || 4;
+        const will = settings.will;
+        let clean = settings.clean;
+        const keepalive = settings.keepalive || 0;
+        const clientId = settings.clientId || "";
+        const username = settings.username;
+        const password = settings.password;
+        const properties = settings.properties;
+        if (clean === void 0) clean = true;
+        let length = 0;
+        if (!protocolId || typeof protocolId !== "string" && !Buffer3.isBuffer(protocolId)) {
+          stream.destroy(new Error("Invalid protocolId"));
+          return false;
+        } else length += protocolId.length + 2;
+        if (protocolVersion !== 3 && protocolVersion !== 4 && protocolVersion !== 5) {
+          stream.destroy(new Error("Invalid protocol version"));
+          return false;
+        } else length += 1;
+        if ((typeof clientId === "string" || Buffer3.isBuffer(clientId)) && (clientId || protocolVersion >= 4) && (clientId || clean)) {
+          length += Buffer3.byteLength(clientId) + 2;
+        } else {
+          if (protocolVersion < 4) {
+            stream.destroy(new Error("clientId must be supplied before 3.1.1"));
+            return false;
+          }
+          if (clean * 1 === 0) {
+            stream.destroy(new Error("clientId must be given if cleanSession set to 0"));
+            return false;
+          }
+        }
+        if (typeof keepalive !== "number" || keepalive < 0 || keepalive > 65535 || keepalive % 1 !== 0) {
+          stream.destroy(new Error("Invalid keepalive"));
+          return false;
+        } else length += 2;
+        length += 1;
+        let propertiesData;
+        let willProperties;
+        if (protocolVersion === 5) {
+          propertiesData = getProperties(stream, properties);
+          if (!propertiesData) {
+            return false;
+          }
+          length += propertiesData.length;
+        }
+        if (will) {
+          if (typeof will !== "object") {
+            stream.destroy(new Error("Invalid will"));
+            return false;
+          }
+          if (!will.topic || typeof will.topic !== "string") {
+            stream.destroy(new Error("Invalid will topic"));
+            return false;
+          } else {
+            length += Buffer3.byteLength(will.topic) + 2;
+          }
+          length += 2;
+          if (will.payload) {
+            if (will.payload.length >= 0) {
+              if (typeof will.payload === "string") {
+                length += Buffer3.byteLength(will.payload);
+              } else {
+                length += will.payload.length;
+              }
+            } else {
+              stream.destroy(new Error("Invalid will payload"));
+              return false;
+            }
+          }
+          willProperties = {};
+          if (protocolVersion === 5) {
+            willProperties = getProperties(stream, will.properties);
+            if (!willProperties) {
+              return false;
+            }
+            length += willProperties.length;
+          }
+        }
+        let providedUsername = false;
+        if (username != null) {
+          if (isStringOrBuffer(username)) {
+            providedUsername = true;
+            length += Buffer3.byteLength(username) + 2;
+          } else {
+            stream.destroy(new Error("Invalid username"));
+            return false;
+          }
+        }
+        if (password != null) {
+          if (!providedUsername) {
+            stream.destroy(new Error("Username is required to use password"));
+            return false;
+          }
+          if (isStringOrBuffer(password)) {
+            length += byteLength(password) + 2;
+          } else {
+            stream.destroy(new Error("Invalid password"));
+            return false;
+          }
+        }
+        stream.write(protocol.CONNECT_HEADER);
+        writeVarByteInt(stream, length);
+        writeStringOrBuffer(stream, protocolId);
+        if (settings.bridgeMode) {
+          protocolVersion += 128;
+        }
+        stream.write(
+          protocolVersion === 131 ? protocol.VERSION131 : protocolVersion === 132 ? protocol.VERSION132 : protocolVersion === 4 ? protocol.VERSION4 : protocolVersion === 5 ? protocol.VERSION5 : protocol.VERSION3
+        );
+        let flags = 0;
+        flags |= username != null ? protocol.USERNAME_MASK : 0;
+        flags |= password != null ? protocol.PASSWORD_MASK : 0;
+        flags |= will && will.retain ? protocol.WILL_RETAIN_MASK : 0;
+        flags |= will && will.qos ? will.qos << protocol.WILL_QOS_SHIFT : 0;
+        flags |= will ? protocol.WILL_FLAG_MASK : 0;
+        flags |= clean ? protocol.CLEAN_SESSION_MASK : 0;
+        stream.write(Buffer3.from([flags]));
+        writeNumber(stream, keepalive);
+        if (protocolVersion === 5) {
+          propertiesData.write();
+        }
+        writeStringOrBuffer(stream, clientId);
+        if (will) {
+          if (protocolVersion === 5) {
+            willProperties.write();
+          }
+          writeString(stream, will.topic);
+          writeStringOrBuffer(stream, will.payload);
+        }
+        if (username != null) {
+          writeStringOrBuffer(stream, username);
+        }
+        if (password != null) {
+          writeStringOrBuffer(stream, password);
+        }
+        return true;
+      }
+      function connack(packet, stream, opts) {
+        const version4 = opts ? opts.protocolVersion : 4;
+        const settings = packet || {};
+        const rc = version4 === 5 ? settings.reasonCode : settings.returnCode;
+        const properties = settings.properties;
+        let length = 2;
+        if (typeof rc !== "number") {
+          stream.destroy(new Error("Invalid return code"));
+          return false;
+        }
+        let propertiesData = null;
+        if (version4 === 5) {
+          propertiesData = getProperties(stream, properties);
+          if (!propertiesData) {
+            return false;
+          }
+          length += propertiesData.length;
+        }
+        stream.write(protocol.CONNACK_HEADER);
+        writeVarByteInt(stream, length);
+        stream.write(settings.sessionPresent ? protocol.SESSIONPRESENT_HEADER : zeroBuf);
+        stream.write(Buffer3.from([rc]));
+        if (propertiesData != null) {
+          propertiesData.write();
+        }
+        return true;
+      }
+      function publish(packet, stream, opts) {
+        debug("publish: packet: %o", packet);
+        const version4 = opts ? opts.protocolVersion : 4;
+        const settings = packet || {};
+        const qos = settings.qos || 0;
+        const retain = settings.retain ? protocol.RETAIN_MASK : 0;
+        const topic = settings.topic;
+        const payload = settings.payload || empty2;
+        const id = settings.messageId;
+        const properties = settings.properties;
+        let length = 0;
+        if (typeof topic === "string") length += Buffer3.byteLength(topic) + 2;
+        else if (Buffer3.isBuffer(topic)) length += topic.length + 2;
+        else {
+          stream.destroy(new Error("Invalid topic"));
+          return false;
+        }
+        if (!Buffer3.isBuffer(payload)) length += Buffer3.byteLength(payload);
+        else length += payload.length;
+        if (qos && typeof id !== "number") {
+          stream.destroy(new Error("Invalid messageId"));
+          return false;
+        } else if (qos) length += 2;
+        let propertiesData = null;
+        if (version4 === 5) {
+          propertiesData = getProperties(stream, properties);
+          if (!propertiesData) {
+            return false;
+          }
+          length += propertiesData.length;
+        }
+        stream.write(protocol.PUBLISH_HEADER[qos][settings.dup ? 1 : 0][retain ? 1 : 0]);
+        writeVarByteInt(stream, length);
+        writeNumber(stream, byteLength(topic));
+        stream.write(topic);
+        if (qos > 0) writeNumber(stream, id);
+        if (propertiesData != null) {
+          propertiesData.write();
+        }
+        debug("publish: payload: %o", payload);
+        return stream.write(payload);
+      }
+      function confirmation(packet, stream, opts) {
+        const version4 = opts ? opts.protocolVersion : 4;
+        const settings = packet || {};
+        const type = settings.cmd || "puback";
+        const id = settings.messageId;
+        const dup = settings.dup && type === "pubrel" ? protocol.DUP_MASK : 0;
+        let qos = 0;
+        const reasonCode = settings.reasonCode;
+        const properties = settings.properties;
+        let length = version4 === 5 ? 3 : 2;
+        if (type === "pubrel") qos = 1;
+        if (typeof id !== "number") {
+          stream.destroy(new Error("Invalid messageId"));
+          return false;
+        }
+        let propertiesData = null;
+        if (version4 === 5) {
+          if (typeof properties === "object") {
+            propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length);
+            if (!propertiesData) {
+              return false;
+            }
+            length += propertiesData.length;
+          }
+        }
+        stream.write(protocol.ACKS[type][qos][dup][0]);
+        if (length === 3) length += reasonCode !== 0 ? 1 : -1;
+        writeVarByteInt(stream, length);
+        writeNumber(stream, id);
+        if (version4 === 5 && length !== 2) {
+          stream.write(Buffer3.from([reasonCode]));
+        }
+        if (propertiesData !== null) {
+          propertiesData.write();
+        } else {
+          if (length === 4) {
+            stream.write(Buffer3.from([0]));
+          }
+        }
+        return true;
+      }
+      function subscribe(packet, stream, opts) {
+        debug("subscribe: packet: ");
+        const version4 = opts ? opts.protocolVersion : 4;
+        const settings = packet || {};
+        const dup = settings.dup ? protocol.DUP_MASK : 0;
+        const id = settings.messageId;
+        const subs = settings.subscriptions;
+        const properties = settings.properties;
+        let length = 0;
+        if (typeof id !== "number") {
+          stream.destroy(new Error("Invalid messageId"));
+          return false;
+        } else length += 2;
+        let propertiesData = null;
+        if (version4 === 5) {
+          propertiesData = getProperties(stream, properties);
+          if (!propertiesData) {
+            return false;
+          }
+          length += propertiesData.length;
+        }
+        if (typeof subs === "object" && subs.length) {
+          for (let i = 0; i < subs.length; i += 1) {
+            const itopic = subs[i].topic;
+            const iqos = subs[i].qos;
+            if (typeof itopic !== "string") {
+              stream.destroy(new Error("Invalid subscriptions - invalid topic"));
+              return false;
+            }
+            if (typeof iqos !== "number") {
+              stream.destroy(new Error("Invalid subscriptions - invalid qos"));
+              return false;
+            }
+            if (version4 === 5) {
+              const nl = subs[i].nl || false;
+              if (typeof nl !== "boolean") {
+                stream.destroy(new Error("Invalid subscriptions - invalid No Local"));
+                return false;
+              }
+              const rap = subs[i].rap || false;
+              if (typeof rap !== "boolean") {
+                stream.destroy(new Error("Invalid subscriptions - invalid Retain as Published"));
+                return false;
+              }
+              const rh = subs[i].rh || 0;
+              if (typeof rh !== "number" || rh > 2) {
+                stream.destroy(new Error("Invalid subscriptions - invalid Retain Handling"));
+                return false;
+              }
+            }
+            length += Buffer3.byteLength(itopic) + 2 + 1;
+          }
+        } else {
+          stream.destroy(new Error("Invalid subscriptions"));
+          return false;
+        }
+        debug("subscribe: writing to stream: %o", protocol.SUBSCRIBE_HEADER);
+        stream.write(protocol.SUBSCRIBE_HEADER[1][dup ? 1 : 0][0]);
+        writeVarByteInt(stream, length);
+        writeNumber(stream, id);
+        if (propertiesData !== null) {
+          propertiesData.write();
+        }
+        let result = true;
+        for (const sub of subs) {
+          const jtopic = sub.topic;
+          const jqos = sub.qos;
+          const jnl = +sub.nl;
+          const jrap = +sub.rap;
+          const jrh = sub.rh;
+          let joptions;
+          writeString(stream, jtopic);
+          joptions = protocol.SUBSCRIBE_OPTIONS_QOS[jqos];
+          if (version4 === 5) {
+            joptions |= jnl ? protocol.SUBSCRIBE_OPTIONS_NL : 0;
+            joptions |= jrap ? protocol.SUBSCRIBE_OPTIONS_RAP : 0;
+            joptions |= jrh ? protocol.SUBSCRIBE_OPTIONS_RH[jrh] : 0;
+          }
+          result = stream.write(Buffer3.from([joptions]));
+        }
+        return result;
+      }
+      function suback(packet, stream, opts) {
+        const version4 = opts ? opts.protocolVersion : 4;
+        const settings = packet || {};
+        const id = settings.messageId;
+        const granted = settings.granted;
+        const properties = settings.properties;
+        let length = 0;
+        if (typeof id !== "number") {
+          stream.destroy(new Error("Invalid messageId"));
+          return false;
+        } else length += 2;
+        if (typeof granted === "object" && granted.length) {
+          for (let i = 0; i < granted.length; i += 1) {
+            if (typeof granted[i] !== "number") {
+              stream.destroy(new Error("Invalid qos vector"));
+              return false;
+            }
+            length += 1;
+          }
+        } else {
+          stream.destroy(new Error("Invalid qos vector"));
+          return false;
+        }
+        let propertiesData = null;
+        if (version4 === 5) {
+          propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length);
+          if (!propertiesData) {
+            return false;
+          }
+          length += propertiesData.length;
+        }
+        stream.write(protocol.SUBACK_HEADER);
+        writeVarByteInt(stream, length);
+        writeNumber(stream, id);
+        if (propertiesData !== null) {
+          propertiesData.write();
+        }
+        return stream.write(Buffer3.from(granted));
+      }
+      function unsubscribe(packet, stream, opts) {
+        const version4 = opts ? opts.protocolVersion : 4;
+        const settings = packet || {};
+        const id = settings.messageId;
+        const dup = settings.dup ? protocol.DUP_MASK : 0;
+        const unsubs = settings.unsubscriptions;
+        const properties = settings.properties;
+        let length = 0;
+        if (typeof id !== "number") {
+          stream.destroy(new Error("Invalid messageId"));
+          return false;
+        } else {
+          length += 2;
+        }
+        if (typeof unsubs === "object" && unsubs.length) {
+          for (let i = 0; i < unsubs.length; i += 1) {
+            if (typeof unsubs[i] !== "string") {
+              stream.destroy(new Error("Invalid unsubscriptions"));
+              return false;
+            }
+            length += Buffer3.byteLength(unsubs[i]) + 2;
+          }
+        } else {
+          stream.destroy(new Error("Invalid unsubscriptions"));
+          return false;
+        }
+        let propertiesData = null;
+        if (version4 === 5) {
+          propertiesData = getProperties(stream, properties);
+          if (!propertiesData) {
+            return false;
+          }
+          length += propertiesData.length;
+        }
+        stream.write(protocol.UNSUBSCRIBE_HEADER[1][dup ? 1 : 0][0]);
+        writeVarByteInt(stream, length);
+        writeNumber(stream, id);
+        if (propertiesData !== null) {
+          propertiesData.write();
+        }
+        let result = true;
+        for (let j = 0; j < unsubs.length; j++) {
+          result = writeString(stream, unsubs[j]);
+        }
+        return result;
+      }
+      function unsuback(packet, stream, opts) {
+        const version4 = opts ? opts.protocolVersion : 4;
+        const settings = packet || {};
+        const id = settings.messageId;
+        const dup = settings.dup ? protocol.DUP_MASK : 0;
+        const granted = settings.granted;
+        const properties = settings.properties;
+        const type = settings.cmd;
+        const qos = 0;
+        let length = 2;
+        if (typeof id !== "number") {
+          stream.destroy(new Error("Invalid messageId"));
+          return false;
+        }
+        if (version4 === 5) {
+          if (typeof granted === "object" && granted.length) {
+            for (let i = 0; i < granted.length; i += 1) {
+              if (typeof granted[i] !== "number") {
+                stream.destroy(new Error("Invalid qos vector"));
+                return false;
+              }
+              length += 1;
+            }
+          } else {
+            stream.destroy(new Error("Invalid qos vector"));
+            return false;
+          }
+        }
+        let propertiesData = null;
+        if (version4 === 5) {
+          propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length);
+          if (!propertiesData) {
+            return false;
+          }
+          length += propertiesData.length;
+        }
+        stream.write(protocol.ACKS[type][qos][dup][0]);
+        writeVarByteInt(stream, length);
+        writeNumber(stream, id);
+        if (propertiesData !== null) {
+          propertiesData.write();
+        }
+        if (version4 === 5) {
+          stream.write(Buffer3.from(granted));
+        }
+        return true;
+      }
+      function emptyPacket(packet, stream, opts) {
+        return stream.write(protocol.EMPTY[packet.cmd]);
+      }
+      function disconnect(packet, stream, opts) {
+        const version4 = opts ? opts.protocolVersion : 4;
+        const settings = packet || {};
+        const reasonCode = settings.reasonCode;
+        const properties = settings.properties;
+        let length = version4 === 5 ? 1 : 0;
+        let propertiesData = null;
+        if (version4 === 5) {
+          propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length);
+          if (!propertiesData) {
+            return false;
+          }
+          length += propertiesData.length;
+        }
+        stream.write(Buffer3.from([protocol.codes.disconnect << 4]));
+        writeVarByteInt(stream, length);
+        if (version4 === 5) {
+          stream.write(Buffer3.from([reasonCode]));
+        }
+        if (propertiesData !== null) {
+          propertiesData.write();
+        }
+        return true;
+      }
+      function auth(packet, stream, opts) {
+        const version4 = opts ? opts.protocolVersion : 4;
+        const settings = packet || {};
+        const reasonCode = settings.reasonCode;
+        const properties = settings.properties;
+        let length = version4 === 5 ? 1 : 0;
+        if (version4 !== 5) stream.destroy(new Error("Invalid mqtt version for auth packet"));
+        const propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length);
+        if (!propertiesData) {
+          return false;
+        }
+        length += propertiesData.length;
+        stream.write(Buffer3.from([protocol.codes.auth << 4]));
+        writeVarByteInt(stream, length);
+        stream.write(Buffer3.from([reasonCode]));
+        if (propertiesData !== null) {
+          propertiesData.write();
+        }
+        return true;
+      }
+      var varByteIntCache = {};
+      function writeVarByteInt(stream, num) {
+        if (num > protocol.VARBYTEINT_MAX) {
+          stream.destroy(new Error(`Invalid variable byte integer: ${num}`));
+          return false;
+        }
+        let buffer = varByteIntCache[num];
+        if (!buffer) {
+          buffer = genBufVariableByteInt(num);
+          if (num < 16384) varByteIntCache[num] = buffer;
+        }
+        debug("writeVarByteInt: writing to stream: %o", buffer);
+        return stream.write(buffer);
+      }
+      function writeString(stream, string) {
+        const strlen = Buffer3.byteLength(string);
+        writeNumber(stream, strlen);
+        debug("writeString: %s", string);
+        return stream.write(string, "utf8");
+      }
+      function writeStringPair(stream, name2, value) {
+        writeString(stream, name2);
+        writeString(stream, value);
+      }
+      function writeNumberCached(stream, number) {
+        debug("writeNumberCached: number: %d", number);
+        debug("writeNumberCached: %o", numCache[number]);
+        return stream.write(numCache[number]);
+      }
+      function writeNumberGenerated(stream, number) {
+        const generatedNumber = generateNumber(number);
+        debug("writeNumberGenerated: %o", generatedNumber);
+        return stream.write(generatedNumber);
+      }
+      function write4ByteNumber(stream, number) {
+        const generated4ByteBuffer = generate4ByteBuffer(number);
+        debug("write4ByteNumber: %o", generated4ByteBuffer);
+        return stream.write(generated4ByteBuffer);
+      }
+      function writeStringOrBuffer(stream, toWrite) {
+        if (typeof toWrite === "string") {
+          writeString(stream, toWrite);
+        } else if (toWrite) {
+          writeNumber(stream, toWrite.length);
+          stream.write(toWrite);
+        } else writeNumber(stream, 0);
+      }
+      function getProperties(stream, properties) {
+        if (typeof properties !== "object" || properties.length != null) {
+          return {
+            length: 1,
+            write() {
+              writeProperties(stream, {}, 0);
+            }
+          };
+        }
+        let propertiesLength = 0;
+        function getLengthProperty(name2, value) {
+          const type = protocol.propertiesTypes[name2];
+          let length = 0;
+          switch (type) {
+            case "byte": {
+              if (typeof value !== "boolean") {
+                stream.destroy(new Error(`Invalid ${name2}: ${value}`));
+                return false;
+              }
+              length += 1 + 1;
+              break;
+            }
+            case "int8": {
+              if (typeof value !== "number" || value < 0 || value > 255) {
+                stream.destroy(new Error(`Invalid ${name2}: ${value}`));
+                return false;
+              }
+              length += 1 + 1;
+              break;
+            }
+            case "binary": {
+              if (value && value === null) {
+                stream.destroy(new Error(`Invalid ${name2}: ${value}`));
+                return false;
+              }
+              length += 1 + Buffer3.byteLength(value) + 2;
+              break;
+            }
+            case "int16": {
+              if (typeof value !== "number" || value < 0 || value > 65535) {
+                stream.destroy(new Error(`Invalid ${name2}: ${value}`));
+                return false;
+              }
+              length += 1 + 2;
+              break;
+            }
+            case "int32": {
+              if (typeof value !== "number" || value < 0 || value > 4294967295) {
+                stream.destroy(new Error(`Invalid ${name2}: ${value}`));
+                return false;
+              }
+              length += 1 + 4;
+              break;
+            }
+            case "var": {
+              if (typeof value !== "number" || value < 0 || value > 268435455) {
+                stream.destroy(new Error(`Invalid ${name2}: ${value}`));
+                return false;
+              }
+              length += 1 + Buffer3.byteLength(genBufVariableByteInt(value));
+              break;
+            }
+            case "string": {
+              if (typeof value !== "string") {
+                stream.destroy(new Error(`Invalid ${name2}: ${value}`));
+                return false;
+              }
+              length += 1 + 2 + Buffer3.byteLength(value.toString());
+              break;
+            }
+            case "pair": {
+              if (typeof value !== "object") {
+                stream.destroy(new Error(`Invalid ${name2}: ${value}`));
+                return false;
+              }
+              length += Object.getOwnPropertyNames(value).reduce((result, name3) => {
+                const currentValue = value[name3];
+                if (Array.isArray(currentValue)) {
+                  result += currentValue.reduce((currentLength, value2) => {
+                    currentLength += 1 + 2 + Buffer3.byteLength(name3.toString()) + 2 + Buffer3.byteLength(value2.toString());
+                    return currentLength;
+                  }, 0);
+                } else {
+                  result += 1 + 2 + Buffer3.byteLength(name3.toString()) + 2 + Buffer3.byteLength(value[name3].toString());
+                }
+                return result;
+              }, 0);
+              break;
+            }
+            default: {
+              stream.destroy(new Error(`Invalid property ${name2}: ${value}`));
+              return false;
+            }
+          }
+          return length;
+        }
+        if (properties) {
+          for (const propName in properties) {
+            let propLength = 0;
+            let propValueLength = 0;
+            const propValue = properties[propName];
+            if (propValue === void 0) {
+              continue;
+            } else if (Array.isArray(propValue)) {
+              for (let valueIndex = 0; valueIndex < propValue.length; valueIndex++) {
+                propValueLength = getLengthProperty(propName, propValue[valueIndex]);
+                if (!propValueLength) {
+                  return false;
+                }
+                propLength += propValueLength;
+              }
+            } else {
+              propValueLength = getLengthProperty(propName, propValue);
+              if (!propValueLength) {
+                return false;
+              }
+              propLength = propValueLength;
+            }
+            if (!propLength) return false;
+            propertiesLength += propLength;
+          }
+        }
+        const propertiesLengthLength = Buffer3.byteLength(genBufVariableByteInt(propertiesLength));
+        return {
+          length: propertiesLengthLength + propertiesLength,
+          write() {
+            writeProperties(stream, properties, propertiesLength);
+          }
+        };
+      }
+      function getPropertiesByMaximumPacketSize(stream, properties, opts, length) {
+        const mayEmptyProps = ["reasonString", "userProperties"];
+        const maximumPacketSize = opts && opts.properties && opts.properties.maximumPacketSize ? opts.properties.maximumPacketSize : 0;
+        let propertiesData = getProperties(stream, properties);
+        if (maximumPacketSize) {
+          while (length + propertiesData.length > maximumPacketSize) {
+            const currentMayEmptyProp = mayEmptyProps.shift();
+            if (currentMayEmptyProp && properties[currentMayEmptyProp]) {
+              delete properties[currentMayEmptyProp];
+              propertiesData = getProperties(stream, properties);
+            } else {
+              return false;
+            }
+          }
+        }
+        return propertiesData;
+      }
+      function writeProperty(stream, propName, value) {
+        const type = protocol.propertiesTypes[propName];
+        switch (type) {
+          case "byte": {
+            stream.write(Buffer3.from([protocol.properties[propName]]));
+            stream.write(Buffer3.from([+value]));
+            break;
+          }
+          case "int8": {
+            stream.write(Buffer3.from([protocol.properties[propName]]));
+            stream.write(Buffer3.from([value]));
+            break;
+          }
+          case "binary": {
+            stream.write(Buffer3.from([protocol.properties[propName]]));
+            writeStringOrBuffer(stream, value);
+            break;
+          }
+          case "int16": {
+            stream.write(Buffer3.from([protocol.properties[propName]]));
+            writeNumber(stream, value);
+            break;
+          }
+          case "int32": {
+            stream.write(Buffer3.from([protocol.properties[propName]]));
+            write4ByteNumber(stream, value);
+            break;
+          }
+          case "var": {
+            stream.write(Buffer3.from([protocol.properties[propName]]));
+            writeVarByteInt(stream, value);
+            break;
+          }
+          case "string": {
+            stream.write(Buffer3.from([protocol.properties[propName]]));
+            writeString(stream, value);
+            break;
+          }
+          case "pair": {
+            Object.getOwnPropertyNames(value).forEach((name2) => {
+              const currentValue = value[name2];
+              if (Array.isArray(currentValue)) {
+                currentValue.forEach((value2) => {
+                  stream.write(Buffer3.from([protocol.properties[propName]]));
+                  writeStringPair(stream, name2.toString(), value2.toString());
+                });
+              } else {
+                stream.write(Buffer3.from([protocol.properties[propName]]));
+                writeStringPair(stream, name2.toString(), currentValue.toString());
+              }
+            });
+            break;
+          }
+          default: {
+            stream.destroy(new Error(`Invalid property ${propName} value: ${value}`));
+            return false;
+          }
+        }
+      }
+      function writeProperties(stream, properties, propertiesLength) {
+        writeVarByteInt(stream, propertiesLength);
+        for (const propName in properties) {
+          if (Object.prototype.hasOwnProperty.call(properties, propName) && properties[propName] != null) {
+            const value = properties[propName];
+            if (Array.isArray(value)) {
+              for (let valueIndex = 0; valueIndex < value.length; valueIndex++) {
+                writeProperty(stream, propName, value[valueIndex]);
+              }
+            } else {
+              writeProperty(stream, propName, value);
+            }
+          }
+        }
+      }
+      function byteLength(bufOrString) {
+        if (!bufOrString) return 0;
+        else if (bufOrString instanceof Buffer3) return bufOrString.length;
+        else return Buffer3.byteLength(bufOrString);
+      }
+      function isStringOrBuffer(field) {
+        return typeof field === "string" || field instanceof Buffer3;
+      }
+      module.exports = generate;
+    }
+  });
+
+  // node_modules/mqtt-packet/generate.js
+  var require_generate = __commonJS({
+    "node_modules/mqtt-packet/generate.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var writeToStream = require_writeToStream();
+      var { EventEmitter: EventEmitter2 } = (init_events(), __toCommonJS(events_exports));
+      var { Buffer: Buffer3 } = (init_buffer(), __toCommonJS(buffer_exports));
+      function generate(packet, opts) {
+        const stream = new Accumulator();
+        writeToStream(packet, stream, opts);
+        return stream.concat();
+      }
+      var Accumulator = class extends EventEmitter2 {
+        constructor() {
+          super();
+          this._array = new Array(20);
+          this._i = 0;
+        }
+        write(chunk) {
+          this._array[this._i++] = chunk;
+          return true;
+        }
+        concat() {
+          let length = 0;
+          const lengths = new Array(this._array.length);
+          const list = this._array;
+          let pos = 0;
+          let i;
+          for (i = 0; i < list.length && list[i] !== void 0; i++) {
+            if (typeof list[i] !== "string") lengths[i] = list[i].length;
+            else lengths[i] = Buffer3.byteLength(list[i]);
+            length += lengths[i];
+          }
+          const result = Buffer3.allocUnsafe(length);
+          for (i = 0; i < list.length && list[i] !== void 0; i++) {
+            if (typeof list[i] !== "string") {
+              list[i].copy(result, pos);
+              pos += lengths[i];
+            } else {
+              result.write(list[i], pos);
+              pos += lengths[i];
+            }
+          }
+          return result;
+        }
+        destroy(err) {
+          if (err) this.emit("error", err);
+        }
+      };
+      module.exports = generate;
+    }
+  });
+
+  // node_modules/mqtt-packet/mqtt.js
+  var require_mqtt = __commonJS({
+    "node_modules/mqtt-packet/mqtt.js"(exports8) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      exports8.parser = require_parser().parser;
+      exports8.generate = require_generate();
+      exports8.writeToStream = require_writeToStream();
+    }
+  });
+
+  // node_modules/rfdc/index.js
+  var require_rfdc = __commonJS({
+    "node_modules/rfdc/index.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      module.exports = rfdc;
+      function copyBuffer(cur) {
+        if (cur instanceof Buffer2) {
+          return Buffer2.from(cur);
+        }
+        return new cur.constructor(cur.buffer.slice(), cur.byteOffset, cur.length);
+      }
+      function rfdc(opts) {
+        opts = opts || {};
+        if (opts.circles) return rfdcCircles(opts);
+        const constructorHandlers = /* @__PURE__ */ new Map();
+        constructorHandlers.set(Date, (o) => new Date(o));
+        constructorHandlers.set(Map, (o, fn) => new Map(cloneArray(Array.from(o), fn)));
+        constructorHandlers.set(Set, (o, fn) => new Set(cloneArray(Array.from(o), fn)));
+        if (opts.constructorHandlers) {
+          for (const handler2 of opts.constructorHandlers) {
+            constructorHandlers.set(handler2[0], handler2[1]);
+          }
+        }
+        let handler = null;
+        return opts.proto ? cloneProto : clone;
+        function cloneArray(a, fn) {
+          const keys = Object.keys(a);
+          const a2 = new Array(keys.length);
+          for (let i = 0; i < keys.length; i++) {
+            const k = keys[i];
+            const cur = a[k];
+            if (typeof cur !== "object" || cur === null) {
+              a2[k] = cur;
+            } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+              a2[k] = handler(cur, fn);
+            } else if (ArrayBuffer.isView(cur)) {
+              a2[k] = copyBuffer(cur);
+            } else {
+              a2[k] = fn(cur);
+            }
+          }
+          return a2;
+        }
+        function clone(o) {
+          if (typeof o !== "object" || o === null) return o;
+          if (Array.isArray(o)) return cloneArray(o, clone);
+          if (o.constructor !== Object && (handler = constructorHandlers.get(o.constructor))) {
+            return handler(o, clone);
+          }
+          const o2 = {};
+          for (const k in o) {
+            if (Object.hasOwnProperty.call(o, k) === false) continue;
+            const cur = o[k];
+            if (typeof cur !== "object" || cur === null) {
+              o2[k] = cur;
+            } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+              o2[k] = handler(cur, clone);
+            } else if (ArrayBuffer.isView(cur)) {
+              o2[k] = copyBuffer(cur);
+            } else {
+              o2[k] = clone(cur);
+            }
+          }
+          return o2;
+        }
+        function cloneProto(o) {
+          if (typeof o !== "object" || o === null) return o;
+          if (Array.isArray(o)) return cloneArray(o, cloneProto);
+          if (o.constructor !== Object && (handler = constructorHandlers.get(o.constructor))) {
+            return handler(o, cloneProto);
+          }
+          const o2 = {};
+          for (const k in o) {
+            const cur = o[k];
+            if (typeof cur !== "object" || cur === null) {
+              o2[k] = cur;
+            } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+              o2[k] = handler(cur, cloneProto);
+            } else if (ArrayBuffer.isView(cur)) {
+              o2[k] = copyBuffer(cur);
+            } else {
+              o2[k] = cloneProto(cur);
+            }
+          }
+          return o2;
+        }
+      }
+      function rfdcCircles(opts) {
+        const refs = [];
+        const refsNew = [];
+        const constructorHandlers = /* @__PURE__ */ new Map();
+        constructorHandlers.set(Date, (o) => new Date(o));
+        constructorHandlers.set(Map, (o, fn) => new Map(cloneArray(Array.from(o), fn)));
+        constructorHandlers.set(Set, (o, fn) => new Set(cloneArray(Array.from(o), fn)));
+        if (opts.constructorHandlers) {
+          for (const handler2 of opts.constructorHandlers) {
+            constructorHandlers.set(handler2[0], handler2[1]);
+          }
+        }
+        let handler = null;
+        return opts.proto ? cloneProto : clone;
+        function cloneArray(a, fn) {
+          const keys = Object.keys(a);
+          const a2 = new Array(keys.length);
+          for (let i = 0; i < keys.length; i++) {
+            const k = keys[i];
+            const cur = a[k];
+            if (typeof cur !== "object" || cur === null) {
+              a2[k] = cur;
+            } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+              a2[k] = handler(cur, fn);
+            } else if (ArrayBuffer.isView(cur)) {
+              a2[k] = copyBuffer(cur);
+            } else {
+              const index = refs.indexOf(cur);
+              if (index !== -1) {
+                a2[k] = refsNew[index];
+              } else {
+                a2[k] = fn(cur);
+              }
+            }
+          }
+          return a2;
+        }
+        function clone(o) {
+          if (typeof o !== "object" || o === null) return o;
+          if (Array.isArray(o)) return cloneArray(o, clone);
+          if (o.constructor !== Object && (handler = constructorHandlers.get(o.constructor))) {
+            return handler(o, clone);
+          }
+          const o2 = {};
+          refs.push(o);
+          refsNew.push(o2);
+          for (const k in o) {
+            if (Object.hasOwnProperty.call(o, k) === false) continue;
+            const cur = o[k];
+            if (typeof cur !== "object" || cur === null) {
+              o2[k] = cur;
+            } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+              o2[k] = handler(cur, clone);
+            } else if (ArrayBuffer.isView(cur)) {
+              o2[k] = copyBuffer(cur);
+            } else {
+              const i = refs.indexOf(cur);
+              if (i !== -1) {
+                o2[k] = refsNew[i];
+              } else {
+                o2[k] = clone(cur);
+              }
+            }
+          }
+          refs.pop();
+          refsNew.pop();
+          return o2;
+        }
+        function cloneProto(o) {
+          if (typeof o !== "object" || o === null) return o;
+          if (Array.isArray(o)) return cloneArray(o, cloneProto);
+          if (o.constructor !== Object && (handler = constructorHandlers.get(o.constructor))) {
+            return handler(o, cloneProto);
+          }
+          const o2 = {};
+          refs.push(o);
+          refsNew.push(o2);
+          for (const k in o) {
+            const cur = o[k];
+            if (typeof cur !== "object" || cur === null) {
+              o2[k] = cur;
+            } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+              o2[k] = handler(cur, cloneProto);
+            } else if (ArrayBuffer.isView(cur)) {
+              o2[k] = copyBuffer(cur);
+            } else {
+              const i = refs.indexOf(cur);
+              if (i !== -1) {
+                o2[k] = refsNew[i];
+              } else {
+                o2[k] = cloneProto(cur);
+              }
+            }
+          }
+          refs.pop();
+          refsNew.pop();
+          return o2;
+        }
+      }
+    }
+  });
+
+  // node_modules/rfdc/default.js
+  var require_default = __commonJS({
+    "node_modules/rfdc/default.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      module.exports = require_rfdc()();
+    }
+  });
+
+  // build/lib/validations.js
+  var require_validations = __commonJS({
+    "build/lib/validations.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      exports8.validateTopic = validateTopic;
+      exports8.validateTopics = validateTopics;
+      function validateTopic(topic) {
+        const parts = topic.split("/");
+        for (let i = 0; i < parts.length; i++) {
+          if (parts[i] === "+") {
+            continue;
+          }
+          if (parts[i] === "#") {
+            return i === parts.length - 1;
+          }
+          if (parts[i].indexOf("+") !== -1 || parts[i].indexOf("#") !== -1) {
+            return false;
+          }
+        }
+        return true;
+      }
+      function validateTopics(topics) {
+        if (topics.length === 0) {
+          return "empty_topic_list";
+        }
+        for (let i = 0; i < topics.length; i++) {
+          if (!validateTopic(topics[i])) {
+            return topics[i];
+          }
+        }
+        return null;
+      }
+    }
+  });
+
+  // build/lib/store.js
+  var require_store = __commonJS({
+    "build/lib/store.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var readable_stream_1 = require_browser3();
+      var streamsOpts = { objectMode: true };
+      var defaultStoreOptions = {
+        clean: true
+      };
+      var Store = class {
+        options;
+        _inflights;
+        constructor(options) {
+          this.options = options || {};
+          this.options = { ...defaultStoreOptions, ...options };
+          this._inflights = /* @__PURE__ */ new Map();
+        }
+        put(packet, cb) {
+          this._inflights.set(packet.messageId, packet);
+          if (cb) {
+            cb();
+          }
+          return this;
+        }
+        createStream() {
+          const stream = new readable_stream_1.Readable(streamsOpts);
+          const values = [];
+          let destroyed = false;
+          let i = 0;
+          this._inflights.forEach((value, key) => {
+            values.push(value);
+          });
+          stream._read = () => {
+            if (!destroyed && i < values.length) {
+              stream.push(values[i++]);
+            } else {
+              stream.push(null);
+            }
+          };
+          stream.destroy = (err) => {
+            if (destroyed) {
+              return;
+            }
+            destroyed = true;
+            setTimeout(() => {
+              stream.emit("close");
+            }, 0);
+            return stream;
+          };
+          return stream;
+        }
+        del(packet, cb) {
+          const toDelete = this._inflights.get(packet.messageId);
+          if (toDelete) {
+            this._inflights.delete(packet.messageId);
+            cb(null, toDelete);
+          } else if (cb) {
+            cb(new Error("missing packet"));
+          }
+          return this;
+        }
+        get(packet, cb) {
+          const storedPacket = this._inflights.get(packet.messageId);
+          if (storedPacket) {
+            cb(null, storedPacket);
+          } else if (cb) {
+            cb(new Error("missing packet"));
+          }
+          return this;
+        }
+        close(cb) {
+          if (this.options.clean) {
+            this._inflights = null;
+          }
+          if (cb) {
+            cb();
+          }
+        }
+      };
+      exports8.default = Store;
+    }
+  });
+
+  // build/lib/handlers/publish.js
+  var require_publish = __commonJS({
+    "build/lib/handlers/publish.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var validReasonCodes = [0, 16, 128, 131, 135, 144, 145, 151, 153];
+      var handlePublish = (client, packet, done) => {
+        client.log("handlePublish: packet %o", packet);
+        done = typeof done !== "undefined" ? done : client.noop;
+        let topic = packet.topic.toString();
+        const message = packet.payload;
+        const { qos } = packet;
+        const { messageId } = packet;
+        const { options } = client;
+        if (client.options.protocolVersion === 5) {
+          let alias;
+          if (packet.properties) {
+            alias = packet.properties.topicAlias;
+          }
+          if (typeof alias !== "undefined") {
+            if (topic.length === 0) {
+              if (alias > 0 && alias <= 65535) {
+                const gotTopic = client["topicAliasRecv"].getTopicByAlias(alias);
+                if (gotTopic) {
+                  topic = gotTopic;
+                  client.log("handlePublish :: topic complemented by alias. topic: %s - alias: %d", topic, alias);
+                } else {
+                  client.log("handlePublish :: unregistered topic alias. alias: %d", alias);
+                  client.emit("error", new Error("Received unregistered Topic Alias"));
+                  return;
+                }
+              } else {
+                client.log("handlePublish :: topic alias out of range. alias: %d", alias);
+                client.emit("error", new Error("Received Topic Alias is out of range"));
+                return;
+              }
+            } else if (client["topicAliasRecv"].put(topic, alias)) {
+              client.log("handlePublish :: registered topic: %s - alias: %d", topic, alias);
+            } else {
+              client.log("handlePublish :: topic alias out of range. alias: %d", alias);
+              client.emit("error", new Error("Received Topic Alias is out of range"));
+              return;
+            }
+          }
+        }
+        client.log("handlePublish: qos %d", qos);
+        switch (qos) {
+          case 2: {
+            options.customHandleAcks(topic, message, packet, (error, code) => {
+              if (typeof error === "number") {
+                code = error;
+                error = null;
+              }
+              if (error) {
+                return client.emit("error", error);
+              }
+              if (validReasonCodes.indexOf(code) === -1) {
+                return client.emit("error", new Error("Wrong reason code for pubrec"));
+              }
+              if (code) {
+                client["_sendPacket"]({ cmd: "pubrec", messageId, reasonCode: code }, done);
+              } else {
+                client.incomingStore.put(packet, () => {
+                  client["_sendPacket"]({ cmd: "pubrec", messageId }, done);
+                });
+              }
+            });
+            break;
+          }
+          case 1: {
+            options.customHandleAcks(topic, message, packet, (error, code) => {
+              if (typeof error === "number") {
+                code = error;
+                error = null;
+              }
+              if (error) {
+                return client.emit("error", error);
+              }
+              if (validReasonCodes.indexOf(code) === -1) {
+                return client.emit("error", new Error("Wrong reason code for puback"));
+              }
+              if (!code) {
+                client.emit("message", topic, message, packet);
+              }
+              client.handleMessage(packet, (err) => {
+                if (err) {
+                  return done && done(err);
+                }
+                client["_sendPacket"]({ cmd: "puback", messageId, reasonCode: code }, done);
+              });
+            });
+            break;
+          }
+          case 0:
+            client.emit("message", topic, message, packet);
+            client.handleMessage(packet, done);
+            break;
+          default:
+            client.log("handlePublish: unknown QoS. Doing nothing.");
+            break;
+        }
+      };
+      exports8.default = handlePublish;
+    }
+  });
+
+  // package-json:../../package.json
+  var require_package = __commonJS({
+    "package-json:../../package.json"(exports8, module) {
+      module.exports = { version: "5.15.1" };
+    }
+  });
+
+  // build/lib/shared.js
+  var require_shared = __commonJS({
+    "build/lib/shared.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      exports8.MQTTJS_VERSION = exports8.nextTick = exports8.ErrorWithSubackPacket = exports8.ErrorWithReasonCode = void 0;
+      exports8.applyMixin = applyMixin;
+      var ErrorWithReasonCode = class _ErrorWithReasonCode extends Error {
+        code;
+        constructor(message, code) {
+          super(message);
+          this.code = code;
+          Object.setPrototypeOf(this, _ErrorWithReasonCode.prototype);
+          Object.getPrototypeOf(this).name = "ErrorWithReasonCode";
+        }
+      };
+      exports8.ErrorWithReasonCode = ErrorWithReasonCode;
+      var ErrorWithSubackPacket = class _ErrorWithSubackPacket extends Error {
+        packet;
+        constructor(message, packet) {
+          super(message);
+          this.packet = packet;
+          Object.setPrototypeOf(this, _ErrorWithSubackPacket.prototype);
+          Object.getPrototypeOf(this).name = "ErrorWithSubackPacket";
+        }
+      };
+      exports8.ErrorWithSubackPacket = ErrorWithSubackPacket;
+      function applyMixin(target, mixin, includeConstructor = false) {
+        const inheritanceChain = [mixin];
+        while (true) {
+          const current = inheritanceChain[0];
+          const base = Object.getPrototypeOf(current);
+          if (base?.prototype) {
+            inheritanceChain.unshift(base);
+          } else {
+            break;
+          }
+        }
+        for (const ctor of inheritanceChain) {
+          for (const prop of Object.getOwnPropertyNames(ctor.prototype)) {
+            if (includeConstructor || prop !== "constructor") {
+              Object.defineProperty(target.prototype, prop, Object.getOwnPropertyDescriptor(ctor.prototype, prop) ?? /* @__PURE__ */ Object.create(null));
+            }
+          }
+        }
+      }
+      exports8.nextTick = typeof process_exports?.nextTick === "function" ? process_exports.nextTick : (callback) => {
+        setTimeout(callback, 0);
+      };
+      exports8.MQTTJS_VERSION = require_package().version;
+    }
+  });
+
+  // build/lib/handlers/ack.js
+  var require_ack = __commonJS({
+    "build/lib/handlers/ack.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      exports8.ReasonCodes = void 0;
+      var shared_1 = require_shared();
+      exports8.ReasonCodes = {
+        0: "",
+        1: "Unacceptable protocol version",
+        2: "Identifier rejected",
+        3: "Server unavailable",
+        4: "Bad username or password",
+        5: "Not authorized",
+        16: "No matching subscribers",
+        17: "No subscription existed",
+        128: "Unspecified error",
+        129: "Malformed Packet",
+        130: "Protocol Error",
+        131: "Implementation specific error",
+        132: "Unsupported Protocol Version",
+        133: "Client Identifier not valid",
+        134: "Bad User Name or Password",
+        135: "Not authorized",
+        136: "Server unavailable",
+        137: "Server busy",
+        138: "Banned",
+        139: "Server shutting down",
+        140: "Bad authentication method",
+        141: "Keep Alive timeout",
+        142: "Session taken over",
+        143: "Topic Filter invalid",
+        144: "Topic Name invalid",
+        145: "Packet identifier in use",
+        146: "Packet Identifier not found",
+        147: "Receive Maximum exceeded",
+        148: "Topic Alias invalid",
+        149: "Packet too large",
+        150: "Message rate too high",
+        151: "Quota exceeded",
+        152: "Administrative action",
+        153: "Payload format invalid",
+        154: "Retain not supported",
+        155: "QoS not supported",
+        156: "Use another server",
+        157: "Server moved",
+        158: "Shared Subscriptions not supported",
+        159: "Connection rate exceeded",
+        160: "Maximum connect time",
+        161: "Subscription Identifiers not supported",
+        162: "Wildcard Subscriptions not supported"
+      };
+      var handleAck = (client, packet) => {
+        const { messageId } = packet;
+        const type = packet.cmd;
+        let response = null;
+        const cb = client.outgoing[messageId] ? client.outgoing[messageId].cb : null;
+        let err = null;
+        if (!cb) {
+          client.log("_handleAck :: Server sent an ack in error. Ignoring.");
+          return;
+        }
+        client.log("_handleAck :: packet type", type);
+        switch (type) {
+          case "pubcomp":
+          case "puback": {
+            const pubackRC = packet.reasonCode;
+            if (pubackRC && pubackRC > 0 && pubackRC !== 16) {
+              err = new shared_1.ErrorWithReasonCode(`Publish error: ${exports8.ReasonCodes[pubackRC]}`, pubackRC);
+              client["_removeOutgoingAndStoreMessage"](messageId, () => {
+                cb(err, packet);
+              });
+            } else {
+              client["_removeOutgoingAndStoreMessage"](messageId, cb);
+            }
+            break;
+          }
+          case "pubrec": {
+            response = {
+              cmd: "pubrel",
+              qos: 2,
+              messageId
+            };
+            const pubrecRC = packet.reasonCode;
+            if (pubrecRC && pubrecRC > 0 && pubrecRC !== 16) {
+              err = new shared_1.ErrorWithReasonCode(`Publish error: ${exports8.ReasonCodes[pubrecRC]}`, pubrecRC);
+              client["_removeOutgoingAndStoreMessage"](messageId, () => {
+                cb(err, packet);
+              });
+            } else {
+              client["_sendPacket"](response);
+            }
+            break;
+          }
+          case "suback": {
+            delete client.outgoing[messageId];
+            client.messageIdProvider.deallocate(messageId);
+            const granted = packet.granted;
+            for (let grantedI = 0; grantedI < granted.length; grantedI++) {
+              const subackRC = granted[grantedI];
+              if ((subackRC & 128) !== 0) {
+                err = new Error(`Subscribe error: ${exports8.ReasonCodes[subackRC]}`);
+                err.code = subackRC;
+                const topics = client.messageIdToTopic[messageId];
+                if (topics) {
+                  topics.forEach((topic) => {
+                    delete client["_resubscribeTopics"][topic];
+                  });
+                }
+              }
+            }
+            delete client.messageIdToTopic[messageId];
+            client["_invokeStoreProcessingQueue"]();
+            cb(err, packet);
+            break;
+          }
+          case "unsuback": {
+            delete client.outgoing[messageId];
+            client.messageIdProvider.deallocate(messageId);
+            client["_invokeStoreProcessingQueue"]();
+            cb(null, packet);
+            break;
+          }
+          default:
+            client.emit("error", new Error("unrecognized packet type"));
+        }
+        if (client.disconnecting && Object.keys(client.outgoing).length === 0) {
+          client.emit("outgoingEmpty");
+        }
+      };
+      exports8.default = handleAck;
+    }
+  });
+
+  // build/lib/handlers/auth.js
+  var require_auth = __commonJS({
+    "build/lib/handlers/auth.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var shared_1 = require_shared();
+      var ack_1 = require_ack();
+      var handleAuth = (client, packet) => {
+        const { options } = client;
+        const version4 = options.protocolVersion;
+        const rc = version4 === 5 ? packet.reasonCode : packet.returnCode;
+        if (version4 !== 5) {
+          const err = new shared_1.ErrorWithReasonCode(`Protocol error: Auth packets are only supported in MQTT 5. Your version:${version4}`, rc);
+          client.emit("error", err);
+          return;
+        }
+        client.handleAuth(packet, (err, packet2) => {
+          if (err) {
+            client.emit("error", err);
+            return;
+          }
+          if (rc === 24) {
+            client.reconnecting = false;
+            client["_sendPacket"](packet2);
+          } else {
+            const error = new shared_1.ErrorWithReasonCode(`Connection refused: ${ack_1.ReasonCodes[rc]}`, rc);
+            client.emit("error", error);
+          }
+        });
+      };
+      exports8.default = handleAuth;
+    }
+  });
+
+  // node_modules/lru-cache/dist/commonjs/index.js
+  var require_commonjs = __commonJS({
+    "node_modules/lru-cache/dist/commonjs/index.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      exports8.LRUCache = void 0;
+      var perf = typeof performance === "object" && performance && typeof performance.now === "function" ? performance : Date;
+      var warned = /* @__PURE__ */ new Set();
+      var PROCESS = typeof process_exports === "object" && !!process_exports ? process_exports : {};
+      var emitWarning3 = (msg, type, code, fn) => {
+        typeof PROCESS.emitWarning === "function" ? PROCESS.emitWarning(msg, type, code, fn) : console.error(`[${code}] ${type}: ${msg}`);
+      };
+      var AC = globalThis.AbortController;
+      var AS = globalThis.AbortSignal;
+      if (typeof AC === "undefined") {
+        AS = class AbortSignal {
+          onabort;
+          _onabort = [];
+          reason;
+          aborted = false;
+          addEventListener(_, fn) {
+            this._onabort.push(fn);
+          }
+        };
+        AC = class AbortController {
+          constructor() {
+            warnACPolyfill();
+          }
+          signal = new AS();
+          abort(reason) {
+            if (this.signal.aborted)
+              return;
+            this.signal.reason = reason;
+            this.signal.aborted = true;
+            for (const fn of this.signal._onabort) {
+              fn(reason);
+            }
+            this.signal.onabort?.(reason);
+          }
+        };
+        let printACPolyfillWarning = PROCESS.env?.LRU_CACHE_IGNORE_AC_WARNING !== "1";
+        const warnACPolyfill = () => {
+          if (!printACPolyfillWarning)
+            return;
+          printACPolyfillWarning = false;
+          emitWarning3("AbortController is not defined. If using lru-cache in node 14, load an AbortController polyfill from the `node-abort-controller` package. A minimal polyfill is provided for use by LRUCache.fetch(), but it should not be relied upon in other contexts (eg, passing it to other APIs that use AbortController/AbortSignal might have undesirable effects). You may disable this with LRU_CACHE_IGNORE_AC_WARNING=1 in the env.", "NO_ABORT_CONTROLLER", "ENOTSUP", warnACPolyfill);
+        };
+      }
+      var shouldWarn = (code) => !warned.has(code);
+      var TYPE = Symbol("type");
+      var isPosInt = (n) => n && n === Math.floor(n) && n > 0 && isFinite(n);
+      var getUintArray = (max) => !isPosInt(max) ? null : max <= Math.pow(2, 8) ? Uint8Array : max <= Math.pow(2, 16) ? Uint16Array : max <= Math.pow(2, 32) ? Uint32Array : max <= Number.MAX_SAFE_INTEGER ? ZeroArray : null;
+      var ZeroArray = class extends Array {
+        constructor(size) {
+          super(size);
+          this.fill(0);
+        }
+      };
+      var Stack = class _Stack {
+        heap;
+        length;
+        // private constructor
+        static #constructing = false;
+        static create(max) {
+          const HeapCls = getUintArray(max);
+          if (!HeapCls)
+            return [];
+          _Stack.#constructing = true;
+          const s = new _Stack(max, HeapCls);
+          _Stack.#constructing = false;
+          return s;
+        }
+        constructor(max, HeapCls) {
+          if (!_Stack.#constructing) {
+            throw new TypeError("instantiate Stack using Stack.create(n)");
+          }
+          this.heap = new HeapCls(max);
+          this.length = 0;
+        }
+        push(n) {
+          this.heap[this.length++] = n;
+        }
+        pop() {
+          return this.heap[--this.length];
+        }
+      };
+      var LRUCache = class _LRUCache {
+        // options that cannot be changed without disaster
+        #max;
+        #maxSize;
+        #dispose;
+        #disposeAfter;
+        #fetchMethod;
+        #memoMethod;
+        /**
+         * {@link LRUCache.OptionsBase.ttl}
+         */
+        ttl;
+        /**
+         * {@link LRUCache.OptionsBase.ttlResolution}
+         */
+        ttlResolution;
+        /**
+         * {@link LRUCache.OptionsBase.ttlAutopurge}
+         */
+        ttlAutopurge;
+        /**
+         * {@link LRUCache.OptionsBase.updateAgeOnGet}
+         */
+        updateAgeOnGet;
+        /**
+         * {@link LRUCache.OptionsBase.updateAgeOnHas}
+         */
+        updateAgeOnHas;
+        /**
+         * {@link LRUCache.OptionsBase.allowStale}
+         */
+        allowStale;
+        /**
+         * {@link LRUCache.OptionsBase.noDisposeOnSet}
+         */
+        noDisposeOnSet;
+        /**
+         * {@link LRUCache.OptionsBase.noUpdateTTL}
+         */
+        noUpdateTTL;
+        /**
+         * {@link LRUCache.OptionsBase.maxEntrySize}
+         */
+        maxEntrySize;
+        /**
+         * {@link LRUCache.OptionsBase.sizeCalculation}
+         */
+        sizeCalculation;
+        /**
+         * {@link LRUCache.OptionsBase.noDeleteOnFetchRejection}
+         */
+        noDeleteOnFetchRejection;
+        /**
+         * {@link LRUCache.OptionsBase.noDeleteOnStaleGet}
+         */
+        noDeleteOnStaleGet;
+        /**
+         * {@link LRUCache.OptionsBase.allowStaleOnFetchAbort}
+         */
+        allowStaleOnFetchAbort;
+        /**
+         * {@link LRUCache.OptionsBase.allowStaleOnFetchRejection}
+         */
+        allowStaleOnFetchRejection;
+        /**
+         * {@link LRUCache.OptionsBase.ignoreFetchAbort}
+         */
+        ignoreFetchAbort;
+        // computed properties
+        #size;
+        #calculatedSize;
+        #keyMap;
+        #keyList;
+        #valList;
+        #next;
+        #prev;
+        #head;
+        #tail;
+        #free;
+        #disposed;
+        #sizes;
+        #starts;
+        #ttls;
+        #hasDispose;
+        #hasFetchMethod;
+        #hasDisposeAfter;
+        /**
+         * Do not call this method unless you need to inspect the
+         * inner workings of the cache.  If anything returned by this
+         * object is modified in any way, strange breakage may occur.
+         *
+         * These fields are private for a reason!
+         *
+         * @internal
+         */
+        static unsafeExposeInternals(c) {
+          return {
+            // properties
+            starts: c.#starts,
+            ttls: c.#ttls,
+            sizes: c.#sizes,
+            keyMap: c.#keyMap,
+            keyList: c.#keyList,
+            valList: c.#valList,
+            next: c.#next,
+            prev: c.#prev,
+            get head() {
+              return c.#head;
+            },
+            get tail() {
+              return c.#tail;
+            },
+            free: c.#free,
+            // methods
+            isBackgroundFetch: (p) => c.#isBackgroundFetch(p),
+            backgroundFetch: (k, index, options, context) => c.#backgroundFetch(k, index, options, context),
+            moveToTail: (index) => c.#moveToTail(index),
+            indexes: (options) => c.#indexes(options),
+            rindexes: (options) => c.#rindexes(options),
+            isStale: (index) => c.#isStale(index)
+          };
+        }
+        // Protected read-only members
+        /**
+         * {@link LRUCache.OptionsBase.max} (read-only)
+         */
+        get max() {
+          return this.#max;
+        }
+        /**
+         * {@link LRUCache.OptionsBase.maxSize} (read-only)
+         */
+        get maxSize() {
+          return this.#maxSize;
+        }
+        /**
+         * The total computed size of items in the cache (read-only)
+         */
+        get calculatedSize() {
+          return this.#calculatedSize;
+        }
+        /**
+         * The number of items stored in the cache (read-only)
+         */
+        get size() {
+          return this.#size;
+        }
+        /**
+         * {@link LRUCache.OptionsBase.fetchMethod} (read-only)
+         */
+        get fetchMethod() {
+          return this.#fetchMethod;
+        }
+        get memoMethod() {
+          return this.#memoMethod;
+        }
+        /**
+         * {@link LRUCache.OptionsBase.dispose} (read-only)
+         */
+        get dispose() {
+          return this.#dispose;
+        }
+        /**
+         * {@link LRUCache.OptionsBase.disposeAfter} (read-only)
+         */
+        get disposeAfter() {
+          return this.#disposeAfter;
+        }
+        constructor(options) {
+          const { max = 0, ttl, ttlResolution = 1, ttlAutopurge, updateAgeOnGet, updateAgeOnHas, allowStale, dispose, disposeAfter, noDisposeOnSet, noUpdateTTL, maxSize = 0, maxEntrySize = 0, sizeCalculation, fetchMethod, memoMethod, noDeleteOnFetchRejection, noDeleteOnStaleGet, allowStaleOnFetchRejection, allowStaleOnFetchAbort, ignoreFetchAbort } = options;
+          if (max !== 0 && !isPosInt(max)) {
+            throw new TypeError("max option must be a nonnegative integer");
+          }
+          const UintArray = max ? getUintArray(max) : Array;
+          if (!UintArray) {
+            throw new Error("invalid max value: " + max);
+          }
+          this.#max = max;
+          this.#maxSize = maxSize;
+          this.maxEntrySize = maxEntrySize || this.#maxSize;
+          this.sizeCalculation = sizeCalculation;
+          if (this.sizeCalculation) {
+            if (!this.#maxSize && !this.maxEntrySize) {
+              throw new TypeError("cannot set sizeCalculation without setting maxSize or maxEntrySize");
+            }
+            if (typeof this.sizeCalculation !== "function") {
+              throw new TypeError("sizeCalculation set to non-function");
+            }
+          }
+          if (memoMethod !== void 0 && typeof memoMethod !== "function") {
+            throw new TypeError("memoMethod must be a function if defined");
+          }
+          this.#memoMethod = memoMethod;
+          if (fetchMethod !== void 0 && typeof fetchMethod !== "function") {
+            throw new TypeError("fetchMethod must be a function if specified");
+          }
+          this.#fetchMethod = fetchMethod;
+          this.#hasFetchMethod = !!fetchMethod;
+          this.#keyMap = /* @__PURE__ */ new Map();
+          this.#keyList = new Array(max).fill(void 0);
+          this.#valList = new Array(max).fill(void 0);
+          this.#next = new UintArray(max);
+          this.#prev = new UintArray(max);
+          this.#head = 0;
+          this.#tail = 0;
+          this.#free = Stack.create(max);
+          this.#size = 0;
+          this.#calculatedSize = 0;
+          if (typeof dispose === "function") {
+            this.#dispose = dispose;
+          }
+          if (typeof disposeAfter === "function") {
+            this.#disposeAfter = disposeAfter;
+            this.#disposed = [];
+          } else {
+            this.#disposeAfter = void 0;
+            this.#disposed = void 0;
+          }
+          this.#hasDispose = !!this.#dispose;
+          this.#hasDisposeAfter = !!this.#disposeAfter;
+          this.noDisposeOnSet = !!noDisposeOnSet;
+          this.noUpdateTTL = !!noUpdateTTL;
+          this.noDeleteOnFetchRejection = !!noDeleteOnFetchRejection;
+          this.allowStaleOnFetchRejection = !!allowStaleOnFetchRejection;
+          this.allowStaleOnFetchAbort = !!allowStaleOnFetchAbort;
+          this.ignoreFetchAbort = !!ignoreFetchAbort;
+          if (this.maxEntrySize !== 0) {
+            if (this.#maxSize !== 0) {
+              if (!isPosInt(this.#maxSize)) {
+                throw new TypeError("maxSize must be a positive integer if specified");
+              }
+            }
+            if (!isPosInt(this.maxEntrySize)) {
+              throw new TypeError("maxEntrySize must be a positive integer if specified");
+            }
+            this.#initializeSizeTracking();
+          }
+          this.allowStale = !!allowStale;
+          this.noDeleteOnStaleGet = !!noDeleteOnStaleGet;
+          this.updateAgeOnGet = !!updateAgeOnGet;
+          this.updateAgeOnHas = !!updateAgeOnHas;
+          this.ttlResolution = isPosInt(ttlResolution) || ttlResolution === 0 ? ttlResolution : 1;
+          this.ttlAutopurge = !!ttlAutopurge;
+          this.ttl = ttl || 0;
+          if (this.ttl) {
+            if (!isPosInt(this.ttl)) {
+              throw new TypeError("ttl must be a positive integer if specified");
+            }
+            this.#initializeTTLTracking();
+          }
+          if (this.#max === 0 && this.ttl === 0 && this.#maxSize === 0) {
+            throw new TypeError("At least one of max, maxSize, or ttl is required");
+          }
+          if (!this.ttlAutopurge && !this.#max && !this.#maxSize) {
+            const code = "LRU_CACHE_UNBOUNDED";
+            if (shouldWarn(code)) {
+              warned.add(code);
+              const msg = "TTL caching without ttlAutopurge, max, or maxSize can result in unbounded memory consumption.";
+              emitWarning3(msg, "UnboundedCacheWarning", code, _LRUCache);
+            }
+          }
+        }
+        /**
+         * Return the number of ms left in the item's TTL. If item is not in cache,
+         * returns `0`. Returns `Infinity` if item is in cache without a defined TTL.
+         */
+        getRemainingTTL(key) {
+          return this.#keyMap.has(key) ? Infinity : 0;
+        }
+        #initializeTTLTracking() {
+          const ttls = new ZeroArray(this.#max);
+          const starts = new ZeroArray(this.#max);
+          this.#ttls = ttls;
+          this.#starts = starts;
+          this.#setItemTTL = (index, ttl, start = perf.now()) => {
+            starts[index] = ttl !== 0 ? start : 0;
+            ttls[index] = ttl;
+            if (ttl !== 0 && this.ttlAutopurge) {
+              const t = setTimeout(() => {
+                if (this.#isStale(index)) {
+                  this.#delete(this.#keyList[index], "expire");
+                }
+              }, ttl + 1);
+              if (t.unref) {
+                t.unref();
+              }
+            }
+          };
+          this.#updateItemAge = (index) => {
+            starts[index] = ttls[index] !== 0 ? perf.now() : 0;
+          };
+          this.#statusTTL = (status, index) => {
+            if (ttls[index]) {
+              const ttl = ttls[index];
+              const start = starts[index];
+              if (!ttl || !start)
+                return;
+              status.ttl = ttl;
+              status.start = start;
+              status.now = cachedNow || getNow();
+              const age = status.now - start;
+              status.remainingTTL = ttl - age;
+            }
+          };
+          let cachedNow = 0;
+          const getNow = () => {
+            const n = perf.now();
+            if (this.ttlResolution > 0) {
+              cachedNow = n;
+              const t = setTimeout(() => cachedNow = 0, this.ttlResolution);
+              if (t.unref) {
+                t.unref();
+              }
+            }
+            return n;
+          };
+          this.getRemainingTTL = (key) => {
+            const index = this.#keyMap.get(key);
+            if (index === void 0) {
+              return 0;
+            }
+            const ttl = ttls[index];
+            const start = starts[index];
+            if (!ttl || !start) {
+              return Infinity;
+            }
+            const age = (cachedNow || getNow()) - start;
+            return ttl - age;
+          };
+          this.#isStale = (index) => {
+            const s = starts[index];
+            const t = ttls[index];
+            return !!t && !!s && (cachedNow || getNow()) - s > t;
+          };
+        }
+        // conditionally set private methods related to TTL
+        #updateItemAge = () => {
+        };
+        #statusTTL = () => {
+        };
+        #setItemTTL = () => {
+        };
+        /* c8 ignore stop */
+        #isStale = () => false;
+        #initializeSizeTracking() {
+          const sizes = new ZeroArray(this.#max);
+          this.#calculatedSize = 0;
+          this.#sizes = sizes;
+          this.#removeItemSize = (index) => {
+            this.#calculatedSize -= sizes[index];
+            sizes[index] = 0;
+          };
+          this.#requireSize = (k, v, size, sizeCalculation) => {
+            if (this.#isBackgroundFetch(v)) {
+              return 0;
+            }
+            if (!isPosInt(size)) {
+              if (sizeCalculation) {
+                if (typeof sizeCalculation !== "function") {
+                  throw new TypeError("sizeCalculation must be a function");
+                }
+                size = sizeCalculation(v, k);
+                if (!isPosInt(size)) {
+                  throw new TypeError("sizeCalculation return invalid (expect positive integer)");
+                }
+              } else {
+                throw new TypeError("invalid size value (must be positive integer). When maxSize or maxEntrySize is used, sizeCalculation or size must be set.");
+              }
+            }
+            return size;
+          };
+          this.#addItemSize = (index, size, status) => {
+            sizes[index] = size;
+            if (this.#maxSize) {
+              const maxSize = this.#maxSize - sizes[index];
+              while (this.#calculatedSize > maxSize) {
+                this.#evict(true);
+              }
+            }
+            this.#calculatedSize += sizes[index];
+            if (status) {
+              status.entrySize = size;
+              status.totalCalculatedSize = this.#calculatedSize;
+            }
+          };
+        }
+        #removeItemSize = (_i) => {
+        };
+        #addItemSize = (_i, _s, _st) => {
+        };
+        #requireSize = (_k, _v, size, sizeCalculation) => {
+          if (size || sizeCalculation) {
+            throw new TypeError("cannot set size without setting maxSize or maxEntrySize on cache");
+          }
+          return 0;
+        };
+        *#indexes({ allowStale = this.allowStale } = {}) {
+          if (this.#size) {
+            for (let i = this.#tail; true; ) {
+              if (!this.#isValidIndex(i)) {
+                break;
+              }
+              if (allowStale || !this.#isStale(i)) {
+                yield i;
+              }
+              if (i === this.#head) {
+                break;
+              } else {
+                i = this.#prev[i];
+              }
+            }
+          }
+        }
+        *#rindexes({ allowStale = this.allowStale } = {}) {
+          if (this.#size) {
+            for (let i = this.#head; true; ) {
+              if (!this.#isValidIndex(i)) {
+                break;
+              }
+              if (allowStale || !this.#isStale(i)) {
+                yield i;
+              }
+              if (i === this.#tail) {
+                break;
+              } else {
+                i = this.#next[i];
+              }
+            }
+          }
+        }
+        #isValidIndex(index) {
+          return index !== void 0 && this.#keyMap.get(this.#keyList[index]) === index;
+        }
+        /**
+         * Return a generator yielding `[key, value]` pairs,
+         * in order from most recently used to least recently used.
+         */
+        *entries() {
+          for (const i of this.#indexes()) {
+            if (this.#valList[i] !== void 0 && this.#keyList[i] !== void 0 && !this.#isBackgroundFetch(this.#valList[i])) {
+              yield [this.#keyList[i], this.#valList[i]];
+            }
+          }
+        }
+        /**
+         * Inverse order version of {@link LRUCache.entries}
+         *
+         * Return a generator yielding `[key, value]` pairs,
+         * in order from least recently used to most recently used.
+         */
+        *rentries() {
+          for (const i of this.#rindexes()) {
+            if (this.#valList[i] !== void 0 && this.#keyList[i] !== void 0 && !this.#isBackgroundFetch(this.#valList[i])) {
+              yield [this.#keyList[i], this.#valList[i]];
+            }
+          }
+        }
+        /**
+         * Return a generator yielding the keys in the cache,
+         * in order from most recently used to least recently used.
+         */
+        *keys() {
+          for (const i of this.#indexes()) {
+            const k = this.#keyList[i];
+            if (k !== void 0 && !this.#isBackgroundFetch(this.#valList[i])) {
+              yield k;
+            }
+          }
+        }
+        /**
+         * Inverse order version of {@link LRUCache.keys}
+         *
+         * Return a generator yielding the keys in the cache,
+         * in order from least recently used to most recently used.
+         */
+        *rkeys() {
+          for (const i of this.#rindexes()) {
+            const k = this.#keyList[i];
+            if (k !== void 0 && !this.#isBackgroundFetch(this.#valList[i])) {
+              yield k;
+            }
+          }
+        }
+        /**
+         * Return a generator yielding the values in the cache,
+         * in order from most recently used to least recently used.
+         */
+        *values() {
+          for (const i of this.#indexes()) {
+            const v = this.#valList[i];
+            if (v !== void 0 && !this.#isBackgroundFetch(this.#valList[i])) {
+              yield this.#valList[i];
+            }
+          }
+        }
+        /**
+         * Inverse order version of {@link LRUCache.values}
+         *
+         * Return a generator yielding the values in the cache,
+         * in order from least recently used to most recently used.
+         */
+        *rvalues() {
+          for (const i of this.#rindexes()) {
+            const v = this.#valList[i];
+            if (v !== void 0 && !this.#isBackgroundFetch(this.#valList[i])) {
+              yield this.#valList[i];
+            }
+          }
+        }
+        /**
+         * Iterating over the cache itself yields the same results as
+         * {@link LRUCache.entries}
+         */
+        [Symbol.iterator]() {
+          return this.entries();
+        }
+        /**
+         * A String value that is used in the creation of the default string
+         * description of an object. Called by the built-in method
+         * `Object.prototype.toString`.
+         */
+        [Symbol.toStringTag] = "LRUCache";
+        /**
+         * Find a value for which the supplied fn method returns a truthy value,
+         * similar to `Array.find()`. fn is called as `fn(value, key, cache)`.
+         */
+        find(fn, getOptions = {}) {
+          for (const i of this.#indexes()) {
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v;
+            if (value === void 0)
+              continue;
+            if (fn(value, this.#keyList[i], this)) {
+              return this.get(this.#keyList[i], getOptions);
+            }
+          }
+        }
+        /**
+         * Call the supplied function on each item in the cache, in order from most
+         * recently used to least recently used.
+         *
+         * `fn` is called as `fn(value, key, cache)`.
+         *
+         * If `thisp` is provided, function will be called in the `this`-context of
+         * the provided object, or the cache if no `thisp` object is provided.
+         *
+         * Does not update age or recenty of use, or iterate over stale values.
+         */
+        forEach(fn, thisp = this) {
+          for (const i of this.#indexes()) {
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v;
+            if (value === void 0)
+              continue;
+            fn.call(thisp, value, this.#keyList[i], this);
+          }
+        }
+        /**
+         * The same as {@link LRUCache.forEach} but items are iterated over in
+         * reverse order.  (ie, less recently used items are iterated over first.)
+         */
+        rforEach(fn, thisp = this) {
+          for (const i of this.#rindexes()) {
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v;
+            if (value === void 0)
+              continue;
+            fn.call(thisp, value, this.#keyList[i], this);
+          }
+        }
+        /**
+         * Delete any stale entries. Returns true if anything was removed,
+         * false otherwise.
+         */
+        purgeStale() {
+          let deleted = false;
+          for (const i of this.#rindexes({ allowStale: true })) {
+            if (this.#isStale(i)) {
+              this.#delete(this.#keyList[i], "expire");
+              deleted = true;
+            }
+          }
+          return deleted;
+        }
+        /**
+         * Get the extended info about a given entry, to get its value, size, and
+         * TTL info simultaneously. Returns `undefined` if the key is not present.
+         *
+         * Unlike {@link LRUCache#dump}, which is designed to be portable and survive
+         * serialization, the `start` value is always the current timestamp, and the
+         * `ttl` is a calculated remaining time to live (negative if expired).
+         *
+         * Always returns stale values, if their info is found in the cache, so be
+         * sure to check for expirations (ie, a negative {@link LRUCache.Entry#ttl})
+         * if relevant.
+         */
+        info(key) {
+          const i = this.#keyMap.get(key);
+          if (i === void 0)
+            return void 0;
+          const v = this.#valList[i];
+          const value = this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v;
+          if (value === void 0)
+            return void 0;
+          const entry = { value };
+          if (this.#ttls && this.#starts) {
+            const ttl = this.#ttls[i];
+            const start = this.#starts[i];
+            if (ttl && start) {
+              const remain = ttl - (perf.now() - start);
+              entry.ttl = remain;
+              entry.start = Date.now();
+            }
+          }
+          if (this.#sizes) {
+            entry.size = this.#sizes[i];
+          }
+          return entry;
+        }
+        /**
+         * Return an array of [key, {@link LRUCache.Entry}] tuples which can be
+         * passed to {@link LRLUCache#load}.
+         *
+         * The `start` fields are calculated relative to a portable `Date.now()`
+         * timestamp, even if `performance.now()` is available.
+         *
+         * Stale entries are always included in the `dump`, even if
+         * {@link LRUCache.OptionsBase.allowStale} is false.
+         *
+         * Note: this returns an actual array, not a generator, so it can be more
+         * easily passed around.
+         */
+        dump() {
+          const arr = [];
+          for (const i of this.#indexes({ allowStale: true })) {
+            const key = this.#keyList[i];
+            const v = this.#valList[i];
+            const value = this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v;
+            if (value === void 0 || key === void 0)
+              continue;
+            const entry = { value };
+            if (this.#ttls && this.#starts) {
+              entry.ttl = this.#ttls[i];
+              const age = perf.now() - this.#starts[i];
+              entry.start = Math.floor(Date.now() - age);
+            }
+            if (this.#sizes) {
+              entry.size = this.#sizes[i];
+            }
+            arr.unshift([key, entry]);
+          }
+          return arr;
+        }
+        /**
+         * Reset the cache and load in the items in entries in the order listed.
+         *
+         * The shape of the resulting cache may be different if the same options are
+         * not used in both caches.
+         *
+         * The `start` fields are assumed to be calculated relative to a portable
+         * `Date.now()` timestamp, even if `performance.now()` is available.
+         */
+        load(arr) {
+          this.clear();
+          for (const [key, entry] of arr) {
+            if (entry.start) {
+              const age = Date.now() - entry.start;
+              entry.start = perf.now() - age;
+            }
+            this.set(key, entry.value, entry);
+          }
+        }
+        /**
+         * Add a value to the cache.
+         *
+         * Note: if `undefined` is specified as a value, this is an alias for
+         * {@link LRUCache#delete}
+         *
+         * Fields on the {@link LRUCache.SetOptions} options param will override
+         * their corresponding values in the constructor options for the scope
+         * of this single `set()` operation.
+         *
+         * If `start` is provided, then that will set the effective start
+         * time for the TTL calculation. Note that this must be a previous
+         * value of `performance.now()` if supported, or a previous value of
+         * `Date.now()` if not.
+         *
+         * Options object may also include `size`, which will prevent
+         * calling the `sizeCalculation` function and just use the specified
+         * number if it is a positive integer, and `noDisposeOnSet` which
+         * will prevent calling a `dispose` function in the case of
+         * overwrites.
+         *
+         * If the `size` (or return value of `sizeCalculation`) for a given
+         * entry is greater than `maxEntrySize`, then the item will not be
+         * added to the cache.
+         *
+         * Will update the recency of the entry.
+         *
+         * If the value is `undefined`, then this is an alias for
+         * `cache.delete(key)`. `undefined` is never stored in the cache.
+         */
+        set(k, v, setOptions = {}) {
+          if (v === void 0) {
+            this.delete(k);
+            return this;
+          }
+          const { ttl = this.ttl, start, noDisposeOnSet = this.noDisposeOnSet, sizeCalculation = this.sizeCalculation, status } = setOptions;
+          let { noUpdateTTL = this.noUpdateTTL } = setOptions;
+          const size = this.#requireSize(k, v, setOptions.size || 0, sizeCalculation);
+          if (this.maxEntrySize && size > this.maxEntrySize) {
+            if (status) {
+              status.set = "miss";
+              status.maxEntrySizeExceeded = true;
+            }
+            this.#delete(k, "set");
+            return this;
+          }
+          let index = this.#size === 0 ? void 0 : this.#keyMap.get(k);
+          if (index === void 0) {
+            index = this.#size === 0 ? this.#tail : this.#free.length !== 0 ? this.#free.pop() : this.#size === this.#max ? this.#evict(false) : this.#size;
+            this.#keyList[index] = k;
+            this.#valList[index] = v;
+            this.#keyMap.set(k, index);
+            this.#next[this.#tail] = index;
+            this.#prev[index] = this.#tail;
+            this.#tail = index;
+            this.#size++;
+            this.#addItemSize(index, size, status);
+            if (status)
+              status.set = "add";
+            noUpdateTTL = false;
+          } else {
+            this.#moveToTail(index);
+            const oldVal = this.#valList[index];
+            if (v !== oldVal) {
+              if (this.#hasFetchMethod && this.#isBackgroundFetch(oldVal)) {
+                oldVal.__abortController.abort(new Error("replaced"));
+                const { __staleWhileFetching: s } = oldVal;
+                if (s !== void 0 && !noDisposeOnSet) {
+                  if (this.#hasDispose) {
+                    this.#dispose?.(s, k, "set");
+                  }
+                  if (this.#hasDisposeAfter) {
+                    this.#disposed?.push([s, k, "set"]);
+                  }
+                }
+              } else if (!noDisposeOnSet) {
+                if (this.#hasDispose) {
+                  this.#dispose?.(oldVal, k, "set");
+                }
+                if (this.#hasDisposeAfter) {
+                  this.#disposed?.push([oldVal, k, "set"]);
+                }
+              }
+              this.#removeItemSize(index);
+              this.#addItemSize(index, size, status);
+              this.#valList[index] = v;
+              if (status) {
+                status.set = "replace";
+                const oldValue = oldVal && this.#isBackgroundFetch(oldVal) ? oldVal.__staleWhileFetching : oldVal;
+                if (oldValue !== void 0)
+                  status.oldValue = oldValue;
+              }
+            } else if (status) {
+              status.set = "update";
+            }
+          }
+          if (ttl !== 0 && !this.#ttls) {
+            this.#initializeTTLTracking();
+          }
+          if (this.#ttls) {
+            if (!noUpdateTTL) {
+              this.#setItemTTL(index, ttl, start);
+            }
+            if (status)
+              this.#statusTTL(status, index);
+          }
+          if (!noDisposeOnSet && this.#hasDisposeAfter && this.#disposed) {
+            const dt = this.#disposed;
+            let task;
+            while (task = dt?.shift()) {
+              this.#disposeAfter?.(...task);
+            }
+          }
+          return this;
+        }
+        /**
+         * Evict the least recently used item, returning its value or
+         * `undefined` if cache is empty.
+         */
+        pop() {
+          try {
+            while (this.#size) {
+              const val = this.#valList[this.#head];
+              this.#evict(true);
+              if (this.#isBackgroundFetch(val)) {
+                if (val.__staleWhileFetching) {
+                  return val.__staleWhileFetching;
+                }
+              } else if (val !== void 0) {
+                return val;
+              }
+            }
+          } finally {
+            if (this.#hasDisposeAfter && this.#disposed) {
+              const dt = this.#disposed;
+              let task;
+              while (task = dt?.shift()) {
+                this.#disposeAfter?.(...task);
+              }
+            }
+          }
+        }
+        #evict(free) {
+          const head = this.#head;
+          const k = this.#keyList[head];
+          const v = this.#valList[head];
+          if (this.#hasFetchMethod && this.#isBackgroundFetch(v)) {
+            v.__abortController.abort(new Error("evicted"));
+          } else if (this.#hasDispose || this.#hasDisposeAfter) {
+            if (this.#hasDispose) {
+              this.#dispose?.(v, k, "evict");
+            }
+            if (this.#hasDisposeAfter) {
+              this.#disposed?.push([v, k, "evict"]);
+            }
+          }
+          this.#removeItemSize(head);
+          if (free) {
+            this.#keyList[head] = void 0;
+            this.#valList[head] = void 0;
+            this.#free.push(head);
+          }
+          if (this.#size === 1) {
+            this.#head = this.#tail = 0;
+            this.#free.length = 0;
+          } else {
+            this.#head = this.#next[head];
+          }
+          this.#keyMap.delete(k);
+          this.#size--;
+          return head;
+        }
+        /**
+         * Check if a key is in the cache, without updating the recency of use.
+         * Will return false if the item is stale, even though it is technically
+         * in the cache.
+         *
+         * Check if a key is in the cache, without updating the recency of
+         * use. Age is updated if {@link LRUCache.OptionsBase.updateAgeOnHas} is set
+         * to `true` in either the options or the constructor.
+         *
+         * Will return `false` if the item is stale, even though it is technically in
+         * the cache. The difference can be determined (if it matters) by using a
+         * `status` argument, and inspecting the `has` field.
+         *
+         * Will not update item age unless
+         * {@link LRUCache.OptionsBase.updateAgeOnHas} is set.
+         */
+        has(k, hasOptions = {}) {
+          const { updateAgeOnHas = this.updateAgeOnHas, status } = hasOptions;
+          const index = this.#keyMap.get(k);
+          if (index !== void 0) {
+            const v = this.#valList[index];
+            if (this.#isBackgroundFetch(v) && v.__staleWhileFetching === void 0) {
+              return false;
+            }
+            if (!this.#isStale(index)) {
+              if (updateAgeOnHas) {
+                this.#updateItemAge(index);
+              }
+              if (status) {
+                status.has = "hit";
+                this.#statusTTL(status, index);
+              }
+              return true;
+            } else if (status) {
+              status.has = "stale";
+              this.#statusTTL(status, index);
+            }
+          } else if (status) {
+            status.has = "miss";
+          }
+          return false;
+        }
+        /**
+         * Like {@link LRUCache#get} but doesn't update recency or delete stale
+         * items.
+         *
+         * Returns `undefined` if the item is stale, unless
+         * {@link LRUCache.OptionsBase.allowStale} is set.
+         */
+        peek(k, peekOptions = {}) {
+          const { allowStale = this.allowStale } = peekOptions;
+          const index = this.#keyMap.get(k);
+          if (index === void 0 || !allowStale && this.#isStale(index)) {
+            return;
+          }
+          const v = this.#valList[index];
+          return this.#isBackgroundFetch(v) ? v.__staleWhileFetching : v;
+        }
+        #backgroundFetch(k, index, options, context) {
+          const v = index === void 0 ? void 0 : this.#valList[index];
+          if (this.#isBackgroundFetch(v)) {
+            return v;
+          }
+          const ac = new AC();
+          const { signal } = options;
+          signal?.addEventListener("abort", () => ac.abort(signal.reason), {
+            signal: ac.signal
+          });
+          const fetchOpts = {
+            signal: ac.signal,
+            options,
+            context
+          };
+          const cb = (v2, updateCache = false) => {
+            const { aborted } = ac.signal;
+            const ignoreAbort = options.ignoreFetchAbort && v2 !== void 0;
+            if (options.status) {
+              if (aborted && !updateCache) {
+                options.status.fetchAborted = true;
+                options.status.fetchError = ac.signal.reason;
+                if (ignoreAbort)
+                  options.status.fetchAbortIgnored = true;
+              } else {
+                options.status.fetchResolved = true;
+              }
+            }
+            if (aborted && !ignoreAbort && !updateCache) {
+              return fetchFail(ac.signal.reason);
+            }
+            const bf2 = p;
+            if (this.#valList[index] === p) {
+              if (v2 === void 0) {
+                if (bf2.__staleWhileFetching) {
+                  this.#valList[index] = bf2.__staleWhileFetching;
+                } else {
+                  this.#delete(k, "fetch");
+                }
+              } else {
+                if (options.status)
+                  options.status.fetchUpdated = true;
+                this.set(k, v2, fetchOpts.options);
+              }
+            }
+            return v2;
+          };
+          const eb = (er) => {
+            if (options.status) {
+              options.status.fetchRejected = true;
+              options.status.fetchError = er;
+            }
+            return fetchFail(er);
+          };
+          const fetchFail = (er) => {
+            const { aborted } = ac.signal;
+            const allowStaleAborted = aborted && options.allowStaleOnFetchAbort;
+            const allowStale = allowStaleAborted || options.allowStaleOnFetchRejection;
+            const noDelete = allowStale || options.noDeleteOnFetchRejection;
+            const bf2 = p;
+            if (this.#valList[index] === p) {
+              const del = !noDelete || bf2.__staleWhileFetching === void 0;
+              if (del) {
+                this.#delete(k, "fetch");
+              } else if (!allowStaleAborted) {
+                this.#valList[index] = bf2.__staleWhileFetching;
+              }
+            }
+            if (allowStale) {
+              if (options.status && bf2.__staleWhileFetching !== void 0) {
+                options.status.returnedStale = true;
+              }
+              return bf2.__staleWhileFetching;
+            } else if (bf2.__returned === bf2) {
+              throw er;
+            }
+          };
+          const pcall = (res, rej) => {
+            const fmp = this.#fetchMethod?.(k, v, fetchOpts);
+            if (fmp && fmp instanceof Promise) {
+              fmp.then((v2) => res(v2 === void 0 ? void 0 : v2), rej);
+            }
+            ac.signal.addEventListener("abort", () => {
+              if (!options.ignoreFetchAbort || options.allowStaleOnFetchAbort) {
+                res(void 0);
+                if (options.allowStaleOnFetchAbort) {
+                  res = (v2) => cb(v2, true);
+                }
+              }
+            });
+          };
+          if (options.status)
+            options.status.fetchDispatched = true;
+          const p = new Promise(pcall).then(cb, eb);
+          const bf = Object.assign(p, {
+            __abortController: ac,
+            __staleWhileFetching: v,
+            __returned: void 0
+          });
+          if (index === void 0) {
+            this.set(k, bf, { ...fetchOpts.options, status: void 0 });
+            index = this.#keyMap.get(k);
+          } else {
+            this.#valList[index] = bf;
+          }
+          return bf;
+        }
+        #isBackgroundFetch(p) {
+          if (!this.#hasFetchMethod)
+            return false;
+          const b = p;
+          return !!b && b instanceof Promise && b.hasOwnProperty("__staleWhileFetching") && b.__abortController instanceof AC;
+        }
+        async fetch(k, fetchOptions = {}) {
+          const {
+            // get options
+            allowStale = this.allowStale,
+            updateAgeOnGet = this.updateAgeOnGet,
+            noDeleteOnStaleGet = this.noDeleteOnStaleGet,
+            // set options
+            ttl = this.ttl,
+            noDisposeOnSet = this.noDisposeOnSet,
+            size = 0,
+            sizeCalculation = this.sizeCalculation,
+            noUpdateTTL = this.noUpdateTTL,
+            // fetch exclusive options
+            noDeleteOnFetchRejection = this.noDeleteOnFetchRejection,
+            allowStaleOnFetchRejection = this.allowStaleOnFetchRejection,
+            ignoreFetchAbort = this.ignoreFetchAbort,
+            allowStaleOnFetchAbort = this.allowStaleOnFetchAbort,
+            context,
+            forceRefresh = false,
+            status,
+            signal
+          } = fetchOptions;
+          if (!this.#hasFetchMethod) {
+            if (status)
+              status.fetch = "get";
+            return this.get(k, {
+              allowStale,
+              updateAgeOnGet,
+              noDeleteOnStaleGet,
+              status
+            });
+          }
+          const options = {
+            allowStale,
+            updateAgeOnGet,
+            noDeleteOnStaleGet,
+            ttl,
+            noDisposeOnSet,
+            size,
+            sizeCalculation,
+            noUpdateTTL,
+            noDeleteOnFetchRejection,
+            allowStaleOnFetchRejection,
+            allowStaleOnFetchAbort,
+            ignoreFetchAbort,
+            status,
+            signal
+          };
+          let index = this.#keyMap.get(k);
+          if (index === void 0) {
+            if (status)
+              status.fetch = "miss";
+            const p = this.#backgroundFetch(k, index, options, context);
+            return p.__returned = p;
+          } else {
+            const v = this.#valList[index];
+            if (this.#isBackgroundFetch(v)) {
+              const stale = allowStale && v.__staleWhileFetching !== void 0;
+              if (status) {
+                status.fetch = "inflight";
+                if (stale)
+                  status.returnedStale = true;
+              }
+              return stale ? v.__staleWhileFetching : v.__returned = v;
+            }
+            const isStale = this.#isStale(index);
+            if (!forceRefresh && !isStale) {
+              if (status)
+                status.fetch = "hit";
+              this.#moveToTail(index);
+              if (updateAgeOnGet) {
+                this.#updateItemAge(index);
+              }
+              if (status)
+                this.#statusTTL(status, index);
+              return v;
+            }
+            const p = this.#backgroundFetch(k, index, options, context);
+            const hasStale = p.__staleWhileFetching !== void 0;
+            const staleVal = hasStale && allowStale;
+            if (status) {
+              status.fetch = isStale ? "stale" : "refresh";
+              if (staleVal && isStale)
+                status.returnedStale = true;
+            }
+            return staleVal ? p.__staleWhileFetching : p.__returned = p;
+          }
+        }
+        async forceFetch(k, fetchOptions = {}) {
+          const v = await this.fetch(k, fetchOptions);
+          if (v === void 0)
+            throw new Error("fetch() returned undefined");
+          return v;
+        }
+        memo(k, memoOptions = {}) {
+          const memoMethod = this.#memoMethod;
+          if (!memoMethod) {
+            throw new Error("no memoMethod provided to constructor");
+          }
+          const { context, forceRefresh, ...options } = memoOptions;
+          const v = this.get(k, options);
+          if (!forceRefresh && v !== void 0)
+            return v;
+          const vv = memoMethod(k, v, {
+            options,
+            context
+          });
+          this.set(k, vv, options);
+          return vv;
+        }
+        /**
+         * Return a value from the cache. Will update the recency of the cache
+         * entry found.
+         *
+         * If the key is not found, get() will return `undefined`.
+         */
+        get(k, getOptions = {}) {
+          const { allowStale = this.allowStale, updateAgeOnGet = this.updateAgeOnGet, noDeleteOnStaleGet = this.noDeleteOnStaleGet, status } = getOptions;
+          const index = this.#keyMap.get(k);
+          if (index !== void 0) {
+            const value = this.#valList[index];
+            const fetching = this.#isBackgroundFetch(value);
+            if (status)
+              this.#statusTTL(status, index);
+            if (this.#isStale(index)) {
+              if (status)
+                status.get = "stale";
+              if (!fetching) {
+                if (!noDeleteOnStaleGet) {
+                  this.#delete(k, "expire");
+                }
+                if (status && allowStale)
+                  status.returnedStale = true;
+                return allowStale ? value : void 0;
+              } else {
+                if (status && allowStale && value.__staleWhileFetching !== void 0) {
+                  status.returnedStale = true;
+                }
+                return allowStale ? value.__staleWhileFetching : void 0;
+              }
+            } else {
+              if (status)
+                status.get = "hit";
+              if (fetching) {
+                return value.__staleWhileFetching;
+              }
+              this.#moveToTail(index);
+              if (updateAgeOnGet) {
+                this.#updateItemAge(index);
+              }
+              return value;
+            }
+          } else if (status) {
+            status.get = "miss";
+          }
+        }
+        #connect(p, n) {
+          this.#prev[n] = p;
+          this.#next[p] = n;
+        }
+        #moveToTail(index) {
+          if (index !== this.#tail) {
+            if (index === this.#head) {
+              this.#head = this.#next[index];
+            } else {
+              this.#connect(this.#prev[index], this.#next[index]);
+            }
+            this.#connect(this.#tail, index);
+            this.#tail = index;
+          }
+        }
+        /**
+         * Deletes a key out of the cache.
+         *
+         * Returns true if the key was deleted, false otherwise.
+         */
+        delete(k) {
+          return this.#delete(k, "delete");
+        }
+        #delete(k, reason) {
+          let deleted = false;
+          if (this.#size !== 0) {
+            const index = this.#keyMap.get(k);
+            if (index !== void 0) {
+              deleted = true;
+              if (this.#size === 1) {
+                this.#clear(reason);
+              } else {
+                this.#removeItemSize(index);
+                const v = this.#valList[index];
+                if (this.#isBackgroundFetch(v)) {
+                  v.__abortController.abort(new Error("deleted"));
+                } else if (this.#hasDispose || this.#hasDisposeAfter) {
+                  if (this.#hasDispose) {
+                    this.#dispose?.(v, k, reason);
+                  }
+                  if (this.#hasDisposeAfter) {
+                    this.#disposed?.push([v, k, reason]);
+                  }
+                }
+                this.#keyMap.delete(k);
+                this.#keyList[index] = void 0;
+                this.#valList[index] = void 0;
+                if (index === this.#tail) {
+                  this.#tail = this.#prev[index];
+                } else if (index === this.#head) {
+                  this.#head = this.#next[index];
+                } else {
+                  const pi = this.#prev[index];
+                  this.#next[pi] = this.#next[index];
+                  const ni = this.#next[index];
+                  this.#prev[ni] = this.#prev[index];
+                }
+                this.#size--;
+                this.#free.push(index);
+              }
+            }
+          }
+          if (this.#hasDisposeAfter && this.#disposed?.length) {
+            const dt = this.#disposed;
+            let task;
+            while (task = dt?.shift()) {
+              this.#disposeAfter?.(...task);
+            }
+          }
+          return deleted;
+        }
+        /**
+         * Clear the cache entirely, throwing away all values.
+         */
+        clear() {
+          return this.#clear("delete");
+        }
+        #clear(reason) {
+          for (const index of this.#rindexes({ allowStale: true })) {
+            const v = this.#valList[index];
+            if (this.#isBackgroundFetch(v)) {
+              v.__abortController.abort(new Error("deleted"));
+            } else {
+              const k = this.#keyList[index];
+              if (this.#hasDispose) {
+                this.#dispose?.(v, k, reason);
+              }
+              if (this.#hasDisposeAfter) {
+                this.#disposed?.push([v, k, reason]);
+              }
+            }
+          }
+          this.#keyMap.clear();
+          this.#valList.fill(void 0);
+          this.#keyList.fill(void 0);
+          if (this.#ttls && this.#starts) {
+            this.#ttls.fill(0);
+            this.#starts.fill(0);
+          }
+          if (this.#sizes) {
+            this.#sizes.fill(0);
+          }
+          this.#head = 0;
+          this.#tail = 0;
+          this.#free.length = 0;
+          this.#calculatedSize = 0;
+          this.#size = 0;
+          if (this.#hasDisposeAfter && this.#disposed) {
+            const dt = this.#disposed;
+            let task;
+            while (task = dt?.shift()) {
+              this.#disposeAfter?.(...task);
+            }
+          }
+        }
+      };
+      exports8.LRUCache = LRUCache;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/ContainerBase/index.js
+  var require_ContainerBase = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/ContainerBase/index.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.ContainerIterator = exports8.Container = exports8.Base = void 0;
+      var ContainerIterator = class {
+        constructor(t = 0) {
+          this.iteratorType = t;
+        }
+        equals(t) {
+          return this.o === t.o;
+        }
+      };
+      exports8.ContainerIterator = ContainerIterator;
+      var Base = class {
+        constructor() {
+          this.i = 0;
+        }
+        get length() {
+          return this.i;
+        }
+        size() {
+          return this.i;
+        }
+        empty() {
+          return this.i === 0;
+        }
+      };
+      exports8.Base = Base;
+      var Container = class extends Base {
+      };
+      exports8.Container = Container;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/OtherContainer/Stack.js
+  var require_Stack = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/OtherContainer/Stack.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _ContainerBase = require_ContainerBase();
+      var Stack = class extends _ContainerBase.Base {
+        constructor(t = []) {
+          super();
+          this.S = [];
+          const s = this;
+          t.forEach((function(t2) {
+            s.push(t2);
+          }));
+        }
+        clear() {
+          this.i = 0;
+          this.S = [];
+        }
+        push(t) {
+          this.S.push(t);
+          this.i += 1;
+          return this.i;
+        }
+        pop() {
+          if (this.i === 0) return;
+          this.i -= 1;
+          return this.S.pop();
+        }
+        top() {
+          return this.S[this.i - 1];
+        }
+      };
+      var _default = Stack;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/OtherContainer/Queue.js
+  var require_Queue = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/OtherContainer/Queue.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _ContainerBase = require_ContainerBase();
+      var Queue = class extends _ContainerBase.Base {
+        constructor(t = []) {
+          super();
+          this.j = 0;
+          this.q = [];
+          const s = this;
+          t.forEach((function(t2) {
+            s.push(t2);
+          }));
+        }
+        clear() {
+          this.q = [];
+          this.i = this.j = 0;
+        }
+        push(t) {
+          const s = this.q.length;
+          if (this.j / s > 0.5 && this.j + this.i >= s && s > 4096) {
+            const s2 = this.i;
+            for (let t2 = 0; t2 < s2; ++t2) {
+              this.q[t2] = this.q[this.j + t2];
+            }
+            this.j = 0;
+            this.q[this.i] = t;
+          } else this.q[this.j + this.i] = t;
+          return ++this.i;
+        }
+        pop() {
+          if (this.i === 0) return;
+          const t = this.q[this.j++];
+          this.i -= 1;
+          return t;
+        }
+        front() {
+          if (this.i === 0) return;
+          return this.q[this.j];
+        }
+      };
+      var _default = Queue;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/OtherContainer/PriorityQueue.js
+  var require_PriorityQueue = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/OtherContainer/PriorityQueue.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _ContainerBase = require_ContainerBase();
+      var PriorityQueue = class extends _ContainerBase.Base {
+        constructor(t = [], s = function(t2, s2) {
+          if (t2 > s2) return -1;
+          if (t2 < s2) return 1;
+          return 0;
+        }, i = true) {
+          super();
+          this.v = s;
+          if (Array.isArray(t)) {
+            this.C = i ? [...t] : t;
+          } else {
+            this.C = [];
+            const s2 = this;
+            t.forEach((function(t2) {
+              s2.C.push(t2);
+            }));
+          }
+          this.i = this.C.length;
+          const e = this.i >> 1;
+          for (let t2 = this.i - 1 >> 1; t2 >= 0; --t2) {
+            this.k(t2, e);
+          }
+        }
+        m(t) {
+          const s = this.C[t];
+          while (t > 0) {
+            const i = t - 1 >> 1;
+            const e = this.C[i];
+            if (this.v(e, s) <= 0) break;
+            this.C[t] = e;
+            t = i;
+          }
+          this.C[t] = s;
+        }
+        k(t, s) {
+          const i = this.C[t];
+          while (t < s) {
+            let s2 = t << 1 | 1;
+            const e = s2 + 1;
+            let h = this.C[s2];
+            if (e < this.i && this.v(h, this.C[e]) > 0) {
+              s2 = e;
+              h = this.C[e];
+            }
+            if (this.v(h, i) >= 0) break;
+            this.C[t] = h;
+            t = s2;
+          }
+          this.C[t] = i;
+        }
+        clear() {
+          this.i = 0;
+          this.C.length = 0;
+        }
+        push(t) {
+          this.C.push(t);
+          this.m(this.i);
+          this.i += 1;
+        }
+        pop() {
+          if (this.i === 0) return;
+          const t = this.C[0];
+          const s = this.C.pop();
+          this.i -= 1;
+          if (this.i) {
+            this.C[0] = s;
+            this.k(0, this.i >> 1);
+          }
+          return t;
+        }
+        top() {
+          return this.C[0];
+        }
+        find(t) {
+          return this.C.indexOf(t) >= 0;
+        }
+        remove(t) {
+          const s = this.C.indexOf(t);
+          if (s < 0) return false;
+          if (s === 0) {
+            this.pop();
+          } else if (s === this.i - 1) {
+            this.C.pop();
+            this.i -= 1;
+          } else {
+            this.C.splice(s, 1, this.C.pop());
+            this.i -= 1;
+            this.m(s);
+            this.k(s, this.i >> 1);
+          }
+          return true;
+        }
+        updateItem(t) {
+          const s = this.C.indexOf(t);
+          if (s < 0) return false;
+          this.m(s);
+          this.k(s, this.i >> 1);
+          return true;
+        }
+        toArray() {
+          return [...this.C];
+        }
+      };
+      var _default = PriorityQueue;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/index.js
+  var require_Base = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/index.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _ContainerBase = require_ContainerBase();
+      var SequentialContainer = class extends _ContainerBase.Container {
+      };
+      var _default = SequentialContainer;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/utils/throwError.js
+  var require_throwError = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/utils/throwError.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.throwIteratorAccessError = throwIteratorAccessError;
+      function throwIteratorAccessError() {
+        throw new RangeError("Iterator access denied!");
+      }
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/RandomIterator.js
+  var require_RandomIterator = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Base/RandomIterator.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.RandomIterator = void 0;
+      var _ContainerBase = require_ContainerBase();
+      var _throwError = require_throwError();
+      var RandomIterator = class extends _ContainerBase.ContainerIterator {
+        constructor(t, r) {
+          super(r);
+          this.o = t;
+          if (this.iteratorType === 0) {
+            this.pre = function() {
+              if (this.o === 0) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o -= 1;
+              return this;
+            };
+            this.next = function() {
+              if (this.o === this.container.size()) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o += 1;
+              return this;
+            };
+          } else {
+            this.pre = function() {
+              if (this.o === this.container.size() - 1) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o += 1;
+              return this;
+            };
+            this.next = function() {
+              if (this.o === -1) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o -= 1;
+              return this;
+            };
+          }
+        }
+        get pointer() {
+          return this.container.getElementByPos(this.o);
+        }
+        set pointer(t) {
+          this.container.setElementByPos(this.o, t);
+        }
+      };
+      exports8.RandomIterator = RandomIterator;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Vector.js
+  var require_Vector = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Vector.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _Base = _interopRequireDefault(require_Base());
+      var _RandomIterator = require_RandomIterator();
+      function _interopRequireDefault(t) {
+        return t && t.t ? t : {
+          default: t
+        };
+      }
+      var VectorIterator = class _VectorIterator extends _RandomIterator.RandomIterator {
+        constructor(t, r, e) {
+          super(t, e);
+          this.container = r;
+        }
+        copy() {
+          return new _VectorIterator(this.o, this.container, this.iteratorType);
+        }
+      };
+      var Vector = class extends _Base.default {
+        constructor(t = [], r = true) {
+          super();
+          if (Array.isArray(t)) {
+            this.J = r ? [...t] : t;
+            this.i = t.length;
+          } else {
+            this.J = [];
+            const r2 = this;
+            t.forEach((function(t2) {
+              r2.pushBack(t2);
+            }));
+          }
+        }
+        clear() {
+          this.i = 0;
+          this.J.length = 0;
+        }
+        begin() {
+          return new VectorIterator(0, this);
+        }
+        end() {
+          return new VectorIterator(this.i, this);
+        }
+        rBegin() {
+          return new VectorIterator(this.i - 1, this, 1);
+        }
+        rEnd() {
+          return new VectorIterator(-1, this, 1);
+        }
+        front() {
+          return this.J[0];
+        }
+        back() {
+          return this.J[this.i - 1];
+        }
+        getElementByPos(t) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          return this.J[t];
+        }
+        eraseElementByPos(t) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          this.J.splice(t, 1);
+          this.i -= 1;
+          return this.i;
+        }
+        eraseElementByValue(t) {
+          let r = 0;
+          for (let e = 0; e < this.i; ++e) {
+            if (this.J[e] !== t) {
+              this.J[r++] = this.J[e];
+            }
+          }
+          this.i = this.J.length = r;
+          return this.i;
+        }
+        eraseElementByIterator(t) {
+          const r = t.o;
+          t = t.next();
+          this.eraseElementByPos(r);
+          return t;
+        }
+        pushBack(t) {
+          this.J.push(t);
+          this.i += 1;
+          return this.i;
+        }
+        popBack() {
+          if (this.i === 0) return;
+          this.i -= 1;
+          return this.J.pop();
+        }
+        setElementByPos(t, r) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          this.J[t] = r;
+        }
+        insert(t, r, e = 1) {
+          if (t < 0 || t > this.i) {
+            throw new RangeError();
+          }
+          this.J.splice(t, 0, ...new Array(e).fill(r));
+          this.i += e;
+          return this.i;
+        }
+        find(t) {
+          for (let r = 0; r < this.i; ++r) {
+            if (this.J[r] === t) {
+              return new VectorIterator(r, this);
+            }
+          }
+          return this.end();
+        }
+        reverse() {
+          this.J.reverse();
+        }
+        unique() {
+          let t = 1;
+          for (let r = 1; r < this.i; ++r) {
+            if (this.J[r] !== this.J[r - 1]) {
+              this.J[t++] = this.J[r];
+            }
+          }
+          this.i = this.J.length = t;
+          return this.i;
+        }
+        sort(t) {
+          this.J.sort(t);
+        }
+        forEach(t) {
+          for (let r = 0; r < this.i; ++r) {
+            t(this.J[r], r, this);
+          }
+        }
+        [Symbol.iterator]() {
+          return function* () {
+            yield* this.J;
+          }.bind(this)();
+        }
+      };
+      var _default = Vector;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/SequentialContainer/LinkList.js
+  var require_LinkList = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/SequentialContainer/LinkList.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _Base = _interopRequireDefault(require_Base());
+      var _ContainerBase = require_ContainerBase();
+      var _throwError = require_throwError();
+      function _interopRequireDefault(t) {
+        return t && t.t ? t : {
+          default: t
+        };
+      }
+      var LinkListIterator = class _LinkListIterator extends _ContainerBase.ContainerIterator {
+        constructor(t, i, s, r) {
+          super(r);
+          this.o = t;
+          this.h = i;
+          this.container = s;
+          if (this.iteratorType === 0) {
+            this.pre = function() {
+              if (this.o.L === this.h) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.L;
+              return this;
+            };
+            this.next = function() {
+              if (this.o === this.h) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.B;
+              return this;
+            };
+          } else {
+            this.pre = function() {
+              if (this.o.B === this.h) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.B;
+              return this;
+            };
+            this.next = function() {
+              if (this.o === this.h) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.L;
+              return this;
+            };
+          }
+        }
+        get pointer() {
+          if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+          }
+          return this.o.l;
+        }
+        set pointer(t) {
+          if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+          }
+          this.o.l = t;
+        }
+        copy() {
+          return new _LinkListIterator(this.o, this.h, this.container, this.iteratorType);
+        }
+      };
+      var LinkList = class extends _Base.default {
+        constructor(t = []) {
+          super();
+          this.h = {};
+          this.p = this._ = this.h.L = this.h.B = this.h;
+          const i = this;
+          t.forEach((function(t2) {
+            i.pushBack(t2);
+          }));
+        }
+        V(t) {
+          const { L: i, B: s } = t;
+          i.B = s;
+          s.L = i;
+          if (t === this.p) {
+            this.p = s;
+          }
+          if (t === this._) {
+            this._ = i;
+          }
+          this.i -= 1;
+        }
+        G(t, i) {
+          const s = i.B;
+          const r = {
+            l: t,
+            L: i,
+            B: s
+          };
+          i.B = r;
+          s.L = r;
+          if (i === this.h) {
+            this.p = r;
+          }
+          if (s === this.h) {
+            this._ = r;
+          }
+          this.i += 1;
+        }
+        clear() {
+          this.i = 0;
+          this.p = this._ = this.h.L = this.h.B = this.h;
+        }
+        begin() {
+          return new LinkListIterator(this.p, this.h, this);
+        }
+        end() {
+          return new LinkListIterator(this.h, this.h, this);
+        }
+        rBegin() {
+          return new LinkListIterator(this._, this.h, this, 1);
+        }
+        rEnd() {
+          return new LinkListIterator(this.h, this.h, this, 1);
+        }
+        front() {
+          return this.p.l;
+        }
+        back() {
+          return this._.l;
+        }
+        getElementByPos(t) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          let i = this.p;
+          while (t--) {
+            i = i.B;
+          }
+          return i.l;
+        }
+        eraseElementByPos(t) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          let i = this.p;
+          while (t--) {
+            i = i.B;
+          }
+          this.V(i);
+          return this.i;
+        }
+        eraseElementByValue(t) {
+          let i = this.p;
+          while (i !== this.h) {
+            if (i.l === t) {
+              this.V(i);
+            }
+            i = i.B;
+          }
+          return this.i;
+        }
+        eraseElementByIterator(t) {
+          const i = t.o;
+          if (i === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+          }
+          t = t.next();
+          this.V(i);
+          return t;
+        }
+        pushBack(t) {
+          this.G(t, this._);
+          return this.i;
+        }
+        popBack() {
+          if (this.i === 0) return;
+          const t = this._.l;
+          this.V(this._);
+          return t;
+        }
+        pushFront(t) {
+          this.G(t, this.h);
+          return this.i;
+        }
+        popFront() {
+          if (this.i === 0) return;
+          const t = this.p.l;
+          this.V(this.p);
+          return t;
+        }
+        setElementByPos(t, i) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          let s = this.p;
+          while (t--) {
+            s = s.B;
+          }
+          s.l = i;
+        }
+        insert(t, i, s = 1) {
+          if (t < 0 || t > this.i) {
+            throw new RangeError();
+          }
+          if (s <= 0) return this.i;
+          if (t === 0) {
+            while (s--) this.pushFront(i);
+          } else if (t === this.i) {
+            while (s--) this.pushBack(i);
+          } else {
+            let r = this.p;
+            for (let i2 = 1; i2 < t; ++i2) {
+              r = r.B;
+            }
+            const e = r.B;
+            this.i += s;
+            while (s--) {
+              r.B = {
+                l: i,
+                L: r
+              };
+              r.B.L = r;
+              r = r.B;
+            }
+            r.B = e;
+            e.L = r;
+          }
+          return this.i;
+        }
+        find(t) {
+          let i = this.p;
+          while (i !== this.h) {
+            if (i.l === t) {
+              return new LinkListIterator(i, this.h, this);
+            }
+            i = i.B;
+          }
+          return this.end();
+        }
+        reverse() {
+          if (this.i <= 1) return;
+          let t = this.p;
+          let i = this._;
+          let s = 0;
+          while (s << 1 < this.i) {
+            const r = t.l;
+            t.l = i.l;
+            i.l = r;
+            t = t.B;
+            i = i.L;
+            s += 1;
+          }
+        }
+        unique() {
+          if (this.i <= 1) {
+            return this.i;
+          }
+          let t = this.p;
+          while (t !== this.h) {
+            let i = t;
+            while (i.B !== this.h && i.l === i.B.l) {
+              i = i.B;
+              this.i -= 1;
+            }
+            t.B = i.B;
+            t.B.L = t;
+            t = t.B;
+          }
+          return this.i;
+        }
+        sort(t) {
+          if (this.i <= 1) return;
+          const i = [];
+          this.forEach((function(t2) {
+            i.push(t2);
+          }));
+          i.sort(t);
+          let s = this.p;
+          i.forEach((function(t2) {
+            s.l = t2;
+            s = s.B;
+          }));
+        }
+        merge(t) {
+          const i = this;
+          if (this.i === 0) {
+            t.forEach((function(t2) {
+              i.pushBack(t2);
+            }));
+          } else {
+            let s = this.p;
+            t.forEach((function(t2) {
+              while (s !== i.h && s.l <= t2) {
+                s = s.B;
+              }
+              i.G(t2, s.L);
+            }));
+          }
+          return this.i;
+        }
+        forEach(t) {
+          let i = this.p;
+          let s = 0;
+          while (i !== this.h) {
+            t(i.l, s++, this);
+            i = i.B;
+          }
+        }
+        [Symbol.iterator]() {
+          return function* () {
+            if (this.i === 0) return;
+            let t = this.p;
+            while (t !== this.h) {
+              yield t.l;
+              t = t.B;
+            }
+          }.bind(this)();
+        }
+      };
+      var _default = LinkList;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Deque.js
+  var require_Deque = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/SequentialContainer/Deque.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _Base = _interopRequireDefault(require_Base());
+      var _RandomIterator = require_RandomIterator();
+      function _interopRequireDefault(t) {
+        return t && t.t ? t : {
+          default: t
+        };
+      }
+      var DequeIterator = class _DequeIterator extends _RandomIterator.RandomIterator {
+        constructor(t, i, s) {
+          super(t, s);
+          this.container = i;
+        }
+        copy() {
+          return new _DequeIterator(this.o, this.container, this.iteratorType);
+        }
+      };
+      var Deque = class extends _Base.default {
+        constructor(t = [], i = 1 << 12) {
+          super();
+          this.j = 0;
+          this.D = 0;
+          this.R = 0;
+          this.N = 0;
+          this.P = 0;
+          this.A = [];
+          const s = (() => {
+            if (typeof t.length === "number") return t.length;
+            if (typeof t.size === "number") return t.size;
+            if (typeof t.size === "function") return t.size();
+            throw new TypeError("Cannot get the length or size of the container");
+          })();
+          this.F = i;
+          this.P = Math.max(Math.ceil(s / this.F), 1);
+          for (let t2 = 0; t2 < this.P; ++t2) {
+            this.A.push(new Array(this.F));
+          }
+          const h = Math.ceil(s / this.F);
+          this.j = this.R = (this.P >> 1) - (h >> 1);
+          this.D = this.N = this.F - s % this.F >> 1;
+          const e = this;
+          t.forEach((function(t2) {
+            e.pushBack(t2);
+          }));
+        }
+        T() {
+          const t = [];
+          const i = Math.max(this.P >> 1, 1);
+          for (let s = 0; s < i; ++s) {
+            t[s] = new Array(this.F);
+          }
+          for (let i2 = this.j; i2 < this.P; ++i2) {
+            t[t.length] = this.A[i2];
+          }
+          for (let i2 = 0; i2 < this.R; ++i2) {
+            t[t.length] = this.A[i2];
+          }
+          t[t.length] = [...this.A[this.R]];
+          this.j = i;
+          this.R = t.length - 1;
+          for (let s = 0; s < i; ++s) {
+            t[t.length] = new Array(this.F);
+          }
+          this.A = t;
+          this.P = t.length;
+        }
+        O(t) {
+          const i = this.D + t + 1;
+          const s = i % this.F;
+          let h = s - 1;
+          let e = this.j + (i - s) / this.F;
+          if (s === 0) e -= 1;
+          e %= this.P;
+          if (h < 0) h += this.F;
+          return {
+            curNodeBucketIndex: e,
+            curNodePointerIndex: h
+          };
+        }
+        clear() {
+          this.A = [new Array(this.F)];
+          this.P = 1;
+          this.j = this.R = this.i = 0;
+          this.D = this.N = this.F >> 1;
+        }
+        begin() {
+          return new DequeIterator(0, this);
+        }
+        end() {
+          return new DequeIterator(this.i, this);
+        }
+        rBegin() {
+          return new DequeIterator(this.i - 1, this, 1);
+        }
+        rEnd() {
+          return new DequeIterator(-1, this, 1);
+        }
+        front() {
+          if (this.i === 0) return;
+          return this.A[this.j][this.D];
+        }
+        back() {
+          if (this.i === 0) return;
+          return this.A[this.R][this.N];
+        }
+        pushBack(t) {
+          if (this.i) {
+            if (this.N < this.F - 1) {
+              this.N += 1;
+            } else if (this.R < this.P - 1) {
+              this.R += 1;
+              this.N = 0;
+            } else {
+              this.R = 0;
+              this.N = 0;
+            }
+            if (this.R === this.j && this.N === this.D) this.T();
+          }
+          this.i += 1;
+          this.A[this.R][this.N] = t;
+          return this.i;
+        }
+        popBack() {
+          if (this.i === 0) return;
+          const t = this.A[this.R][this.N];
+          if (this.i !== 1) {
+            if (this.N > 0) {
+              this.N -= 1;
+            } else if (this.R > 0) {
+              this.R -= 1;
+              this.N = this.F - 1;
+            } else {
+              this.R = this.P - 1;
+              this.N = this.F - 1;
+            }
+          }
+          this.i -= 1;
+          return t;
+        }
+        pushFront(t) {
+          if (this.i) {
+            if (this.D > 0) {
+              this.D -= 1;
+            } else if (this.j > 0) {
+              this.j -= 1;
+              this.D = this.F - 1;
+            } else {
+              this.j = this.P - 1;
+              this.D = this.F - 1;
+            }
+            if (this.j === this.R && this.D === this.N) this.T();
+          }
+          this.i += 1;
+          this.A[this.j][this.D] = t;
+          return this.i;
+        }
+        popFront() {
+          if (this.i === 0) return;
+          const t = this.A[this.j][this.D];
+          if (this.i !== 1) {
+            if (this.D < this.F - 1) {
+              this.D += 1;
+            } else if (this.j < this.P - 1) {
+              this.j += 1;
+              this.D = 0;
+            } else {
+              this.j = 0;
+              this.D = 0;
+            }
+          }
+          this.i -= 1;
+          return t;
+        }
+        getElementByPos(t) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          const { curNodeBucketIndex: i, curNodePointerIndex: s } = this.O(t);
+          return this.A[i][s];
+        }
+        setElementByPos(t, i) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          const { curNodeBucketIndex: s, curNodePointerIndex: h } = this.O(t);
+          this.A[s][h] = i;
+        }
+        insert(t, i, s = 1) {
+          if (t < 0 || t > this.i) {
+            throw new RangeError();
+          }
+          if (t === 0) {
+            while (s--) this.pushFront(i);
+          } else if (t === this.i) {
+            while (s--) this.pushBack(i);
+          } else {
+            const h = [];
+            for (let i2 = t; i2 < this.i; ++i2) {
+              h.push(this.getElementByPos(i2));
+            }
+            this.cut(t - 1);
+            for (let t2 = 0; t2 < s; ++t2) this.pushBack(i);
+            for (let t2 = 0; t2 < h.length; ++t2) this.pushBack(h[t2]);
+          }
+          return this.i;
+        }
+        cut(t) {
+          if (t < 0) {
+            this.clear();
+            return 0;
+          }
+          const { curNodeBucketIndex: i, curNodePointerIndex: s } = this.O(t);
+          this.R = i;
+          this.N = s;
+          this.i = t + 1;
+          return this.i;
+        }
+        eraseElementByPos(t) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          if (t === 0) this.popFront();
+          else if (t === this.i - 1) this.popBack();
+          else {
+            const i = [];
+            for (let s2 = t + 1; s2 < this.i; ++s2) {
+              i.push(this.getElementByPos(s2));
+            }
+            this.cut(t);
+            this.popBack();
+            const s = this;
+            i.forEach((function(t2) {
+              s.pushBack(t2);
+            }));
+          }
+          return this.i;
+        }
+        eraseElementByValue(t) {
+          if (this.i === 0) return 0;
+          const i = [];
+          for (let s2 = 0; s2 < this.i; ++s2) {
+            const h = this.getElementByPos(s2);
+            if (h !== t) i.push(h);
+          }
+          const s = i.length;
+          for (let t2 = 0; t2 < s; ++t2) this.setElementByPos(t2, i[t2]);
+          return this.cut(s - 1);
+        }
+        eraseElementByIterator(t) {
+          const i = t.o;
+          this.eraseElementByPos(i);
+          t = t.next();
+          return t;
+        }
+        find(t) {
+          for (let i = 0; i < this.i; ++i) {
+            if (this.getElementByPos(i) === t) {
+              return new DequeIterator(i, this);
+            }
+          }
+          return this.end();
+        }
+        reverse() {
+          let t = 0;
+          let i = this.i - 1;
+          while (t < i) {
+            const s = this.getElementByPos(t);
+            this.setElementByPos(t, this.getElementByPos(i));
+            this.setElementByPos(i, s);
+            t += 1;
+            i -= 1;
+          }
+        }
+        unique() {
+          if (this.i <= 1) {
+            return this.i;
+          }
+          let t = 1;
+          let i = this.getElementByPos(0);
+          for (let s = 1; s < this.i; ++s) {
+            const h = this.getElementByPos(s);
+            if (h !== i) {
+              i = h;
+              this.setElementByPos(t++, h);
+            }
+          }
+          while (this.i > t) this.popBack();
+          return this.i;
+        }
+        sort(t) {
+          const i = [];
+          for (let t2 = 0; t2 < this.i; ++t2) {
+            i.push(this.getElementByPos(t2));
+          }
+          i.sort(t);
+          for (let t2 = 0; t2 < this.i; ++t2) this.setElementByPos(t2, i[t2]);
+        }
+        shrinkToFit() {
+          if (this.i === 0) return;
+          const t = [];
+          this.forEach((function(i) {
+            t.push(i);
+          }));
+          this.P = Math.max(Math.ceil(this.i / this.F), 1);
+          this.i = this.j = this.R = this.D = this.N = 0;
+          this.A = [];
+          for (let t2 = 0; t2 < this.P; ++t2) {
+            this.A.push(new Array(this.F));
+          }
+          for (let i = 0; i < t.length; ++i) this.pushBack(t[i]);
+        }
+        forEach(t) {
+          for (let i = 0; i < this.i; ++i) {
+            t(this.getElementByPos(i), i, this);
+          }
+        }
+        [Symbol.iterator]() {
+          return function* () {
+            for (let t = 0; t < this.i; ++t) {
+              yield this.getElementByPos(t);
+            }
+          }.bind(this)();
+        }
+      };
+      var _default = Deque;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeNode.js
+  var require_TreeNode = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeNode.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.TreeNodeEnableIndex = exports8.TreeNode = void 0;
+      var TreeNode = class {
+        constructor(e, t) {
+          this.ee = 1;
+          this.u = void 0;
+          this.l = void 0;
+          this.U = void 0;
+          this.W = void 0;
+          this.tt = void 0;
+          this.u = e;
+          this.l = t;
+        }
+        L() {
+          let e = this;
+          if (e.ee === 1 && e.tt.tt === e) {
+            e = e.W;
+          } else if (e.U) {
+            e = e.U;
+            while (e.W) {
+              e = e.W;
+            }
+          } else {
+            let t = e.tt;
+            while (t.U === e) {
+              e = t;
+              t = e.tt;
+            }
+            e = t;
+          }
+          return e;
+        }
+        B() {
+          let e = this;
+          if (e.W) {
+            e = e.W;
+            while (e.U) {
+              e = e.U;
+            }
+            return e;
+          } else {
+            let t = e.tt;
+            while (t.W === e) {
+              e = t;
+              t = e.tt;
+            }
+            if (e.W !== t) {
+              return t;
+            } else return e;
+          }
+        }
+        te() {
+          const e = this.tt;
+          const t = this.W;
+          const s = t.U;
+          if (e.tt === this) e.tt = t;
+          else if (e.U === this) e.U = t;
+          else e.W = t;
+          t.tt = e;
+          t.U = this;
+          this.tt = t;
+          this.W = s;
+          if (s) s.tt = this;
+          return t;
+        }
+        se() {
+          const e = this.tt;
+          const t = this.U;
+          const s = t.W;
+          if (e.tt === this) e.tt = t;
+          else if (e.U === this) e.U = t;
+          else e.W = t;
+          t.tt = e;
+          t.W = this;
+          this.tt = t;
+          this.U = s;
+          if (s) s.tt = this;
+          return t;
+        }
+      };
+      exports8.TreeNode = TreeNode;
+      var TreeNodeEnableIndex = class extends TreeNode {
+        constructor() {
+          super(...arguments);
+          this.rt = 1;
+        }
+        te() {
+          const e = super.te();
+          this.ie();
+          e.ie();
+          return e;
+        }
+        se() {
+          const e = super.se();
+          this.ie();
+          e.ie();
+          return e;
+        }
+        ie() {
+          this.rt = 1;
+          if (this.U) {
+            this.rt += this.U.rt;
+          }
+          if (this.W) {
+            this.rt += this.W.rt;
+          }
+        }
+      };
+      exports8.TreeNodeEnableIndex = TreeNodeEnableIndex;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/index.js
+  var require_Base2 = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/index.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _TreeNode = require_TreeNode();
+      var _ContainerBase = require_ContainerBase();
+      var _throwError = require_throwError();
+      var TreeContainer = class extends _ContainerBase.Container {
+        constructor(e = function(e2, t2) {
+          if (e2 < t2) return -1;
+          if (e2 > t2) return 1;
+          return 0;
+        }, t = false) {
+          super();
+          this.Y = void 0;
+          this.v = e;
+          if (t) {
+            this.re = _TreeNode.TreeNodeEnableIndex;
+            this.M = function(e2, t2, i) {
+              const s = this.ne(e2, t2, i);
+              if (s) {
+                let e3 = s.tt;
+                while (e3 !== this.h) {
+                  e3.rt += 1;
+                  e3 = e3.tt;
+                }
+                const t3 = this.he(s);
+                if (t3) {
+                  const { parentNode: e4, grandParent: i2, curNode: s2 } = t3;
+                  e4.ie();
+                  i2.ie();
+                  s2.ie();
+                }
+              }
+              return this.i;
+            };
+            this.V = function(e2) {
+              let t2 = this.fe(e2);
+              while (t2 !== this.h) {
+                t2.rt -= 1;
+                t2 = t2.tt;
+              }
+            };
+          } else {
+            this.re = _TreeNode.TreeNode;
+            this.M = function(e2, t2, i) {
+              const s = this.ne(e2, t2, i);
+              if (s) this.he(s);
+              return this.i;
+            };
+            this.V = this.fe;
+          }
+          this.h = new this.re();
+        }
+        X(e, t) {
+          let i = this.h;
+          while (e) {
+            const s = this.v(e.u, t);
+            if (s < 0) {
+              e = e.W;
+            } else if (s > 0) {
+              i = e;
+              e = e.U;
+            } else return e;
+          }
+          return i;
+        }
+        Z(e, t) {
+          let i = this.h;
+          while (e) {
+            const s = this.v(e.u, t);
+            if (s <= 0) {
+              e = e.W;
+            } else {
+              i = e;
+              e = e.U;
+            }
+          }
+          return i;
+        }
+        $(e, t) {
+          let i = this.h;
+          while (e) {
+            const s = this.v(e.u, t);
+            if (s < 0) {
+              i = e;
+              e = e.W;
+            } else if (s > 0) {
+              e = e.U;
+            } else return e;
+          }
+          return i;
+        }
+        rr(e, t) {
+          let i = this.h;
+          while (e) {
+            const s = this.v(e.u, t);
+            if (s < 0) {
+              i = e;
+              e = e.W;
+            } else {
+              e = e.U;
+            }
+          }
+          return i;
+        }
+        ue(e) {
+          while (true) {
+            const t = e.tt;
+            if (t === this.h) return;
+            if (e.ee === 1) {
+              e.ee = 0;
+              return;
+            }
+            if (e === t.U) {
+              const i = t.W;
+              if (i.ee === 1) {
+                i.ee = 0;
+                t.ee = 1;
+                if (t === this.Y) {
+                  this.Y = t.te();
+                } else t.te();
+              } else {
+                if (i.W && i.W.ee === 1) {
+                  i.ee = t.ee;
+                  t.ee = 0;
+                  i.W.ee = 0;
+                  if (t === this.Y) {
+                    this.Y = t.te();
+                  } else t.te();
+                  return;
+                } else if (i.U && i.U.ee === 1) {
+                  i.ee = 1;
+                  i.U.ee = 0;
+                  i.se();
+                } else {
+                  i.ee = 1;
+                  e = t;
+                }
+              }
+            } else {
+              const i = t.U;
+              if (i.ee === 1) {
+                i.ee = 0;
+                t.ee = 1;
+                if (t === this.Y) {
+                  this.Y = t.se();
+                } else t.se();
+              } else {
+                if (i.U && i.U.ee === 1) {
+                  i.ee = t.ee;
+                  t.ee = 0;
+                  i.U.ee = 0;
+                  if (t === this.Y) {
+                    this.Y = t.se();
+                  } else t.se();
+                  return;
+                } else if (i.W && i.W.ee === 1) {
+                  i.ee = 1;
+                  i.W.ee = 0;
+                  i.te();
+                } else {
+                  i.ee = 1;
+                  e = t;
+                }
+              }
+            }
+          }
+        }
+        fe(e) {
+          if (this.i === 1) {
+            this.clear();
+            return this.h;
+          }
+          let t = e;
+          while (t.U || t.W) {
+            if (t.W) {
+              t = t.W;
+              while (t.U) t = t.U;
+            } else {
+              t = t.U;
+            }
+            [e.u, t.u] = [t.u, e.u];
+            [e.l, t.l] = [t.l, e.l];
+            e = t;
+          }
+          if (this.h.U === t) {
+            this.h.U = t.tt;
+          } else if (this.h.W === t) {
+            this.h.W = t.tt;
+          }
+          this.ue(t);
+          const i = t.tt;
+          if (t === i.U) {
+            i.U = void 0;
+          } else i.W = void 0;
+          this.i -= 1;
+          this.Y.ee = 0;
+          return i;
+        }
+        oe(e, t) {
+          if (e === void 0) return false;
+          const i = this.oe(e.U, t);
+          if (i) return true;
+          if (t(e)) return true;
+          return this.oe(e.W, t);
+        }
+        he(e) {
+          while (true) {
+            const t = e.tt;
+            if (t.ee === 0) return;
+            const i = t.tt;
+            if (t === i.U) {
+              const s = i.W;
+              if (s && s.ee === 1) {
+                s.ee = t.ee = 0;
+                if (i === this.Y) return;
+                i.ee = 1;
+                e = i;
+                continue;
+              } else if (e === t.W) {
+                e.ee = 0;
+                if (e.U) e.U.tt = t;
+                if (e.W) e.W.tt = i;
+                t.W = e.U;
+                i.U = e.W;
+                e.U = t;
+                e.W = i;
+                if (i === this.Y) {
+                  this.Y = e;
+                  this.h.tt = e;
+                } else {
+                  const t2 = i.tt;
+                  if (t2.U === i) {
+                    t2.U = e;
+                  } else t2.W = e;
+                }
+                e.tt = i.tt;
+                t.tt = e;
+                i.tt = e;
+                i.ee = 1;
+                return {
+                  parentNode: t,
+                  grandParent: i,
+                  curNode: e
+                };
+              } else {
+                t.ee = 0;
+                if (i === this.Y) {
+                  this.Y = i.se();
+                } else i.se();
+                i.ee = 1;
+              }
+            } else {
+              const s = i.U;
+              if (s && s.ee === 1) {
+                s.ee = t.ee = 0;
+                if (i === this.Y) return;
+                i.ee = 1;
+                e = i;
+                continue;
+              } else if (e === t.U) {
+                e.ee = 0;
+                if (e.U) e.U.tt = i;
+                if (e.W) e.W.tt = t;
+                i.W = e.U;
+                t.U = e.W;
+                e.U = i;
+                e.W = t;
+                if (i === this.Y) {
+                  this.Y = e;
+                  this.h.tt = e;
+                } else {
+                  const t2 = i.tt;
+                  if (t2.U === i) {
+                    t2.U = e;
+                  } else t2.W = e;
+                }
+                e.tt = i.tt;
+                t.tt = e;
+                i.tt = e;
+                i.ee = 1;
+                return {
+                  parentNode: t,
+                  grandParent: i,
+                  curNode: e
+                };
+              } else {
+                t.ee = 0;
+                if (i === this.Y) {
+                  this.Y = i.te();
+                } else i.te();
+                i.ee = 1;
+              }
+            }
+            return;
+          }
+        }
+        ne(e, t, i) {
+          if (this.Y === void 0) {
+            this.i += 1;
+            this.Y = new this.re(e, t);
+            this.Y.ee = 0;
+            this.Y.tt = this.h;
+            this.h.tt = this.Y;
+            this.h.U = this.Y;
+            this.h.W = this.Y;
+            return;
+          }
+          let s;
+          const r = this.h.U;
+          const n = this.v(r.u, e);
+          if (n === 0) {
+            r.l = t;
+            return;
+          } else if (n > 0) {
+            r.U = new this.re(e, t);
+            r.U.tt = r;
+            s = r.U;
+            this.h.U = s;
+          } else {
+            const r2 = this.h.W;
+            const n2 = this.v(r2.u, e);
+            if (n2 === 0) {
+              r2.l = t;
+              return;
+            } else if (n2 < 0) {
+              r2.W = new this.re(e, t);
+              r2.W.tt = r2;
+              s = r2.W;
+              this.h.W = s;
+            } else {
+              if (i !== void 0) {
+                const r3 = i.o;
+                if (r3 !== this.h) {
+                  const i2 = this.v(r3.u, e);
+                  if (i2 === 0) {
+                    r3.l = t;
+                    return;
+                  } else if (i2 > 0) {
+                    const i3 = r3.L();
+                    const n3 = this.v(i3.u, e);
+                    if (n3 === 0) {
+                      i3.l = t;
+                      return;
+                    } else if (n3 < 0) {
+                      s = new this.re(e, t);
+                      if (i3.W === void 0) {
+                        i3.W = s;
+                        s.tt = i3;
+                      } else {
+                        r3.U = s;
+                        s.tt = r3;
+                      }
+                    }
+                  }
+                }
+              }
+              if (s === void 0) {
+                s = this.Y;
+                while (true) {
+                  const i2 = this.v(s.u, e);
+                  if (i2 > 0) {
+                    if (s.U === void 0) {
+                      s.U = new this.re(e, t);
+                      s.U.tt = s;
+                      s = s.U;
+                      break;
+                    }
+                    s = s.U;
+                  } else if (i2 < 0) {
+                    if (s.W === void 0) {
+                      s.W = new this.re(e, t);
+                      s.W.tt = s;
+                      s = s.W;
+                      break;
+                    }
+                    s = s.W;
+                  } else {
+                    s.l = t;
+                    return;
+                  }
+                }
+              }
+            }
+          }
+          this.i += 1;
+          return s;
+        }
+        I(e, t) {
+          while (e) {
+            const i = this.v(e.u, t);
+            if (i < 0) {
+              e = e.W;
+            } else if (i > 0) {
+              e = e.U;
+            } else return e;
+          }
+          return e || this.h;
+        }
+        clear() {
+          this.i = 0;
+          this.Y = void 0;
+          this.h.tt = void 0;
+          this.h.U = this.h.W = void 0;
+        }
+        updateKeyByIterator(e, t) {
+          const i = e.o;
+          if (i === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+          }
+          if (this.i === 1) {
+            i.u = t;
+            return true;
+          }
+          if (i === this.h.U) {
+            if (this.v(i.B().u, t) > 0) {
+              i.u = t;
+              return true;
+            }
+            return false;
+          }
+          if (i === this.h.W) {
+            if (this.v(i.L().u, t) < 0) {
+              i.u = t;
+              return true;
+            }
+            return false;
+          }
+          const s = i.L().u;
+          if (this.v(s, t) >= 0) return false;
+          const r = i.B().u;
+          if (this.v(r, t) <= 0) return false;
+          i.u = t;
+          return true;
+        }
+        eraseElementByPos(e) {
+          if (e < 0 || e > this.i - 1) {
+            throw new RangeError();
+          }
+          let t = 0;
+          const i = this;
+          this.oe(this.Y, (function(s) {
+            if (e === t) {
+              i.V(s);
+              return true;
+            }
+            t += 1;
+            return false;
+          }));
+          return this.i;
+        }
+        eraseElementByKey(e) {
+          if (this.i === 0) return false;
+          const t = this.I(this.Y, e);
+          if (t === this.h) return false;
+          this.V(t);
+          return true;
+        }
+        eraseElementByIterator(e) {
+          const t = e.o;
+          if (t === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+          }
+          const i = t.W === void 0;
+          const s = e.iteratorType === 0;
+          if (s) {
+            if (i) e.next();
+          } else {
+            if (!i || t.U === void 0) e.next();
+          }
+          this.V(t);
+          return e;
+        }
+        forEach(e) {
+          let t = 0;
+          for (const i of this) e(i, t++, this);
+        }
+        getElementByPos(e) {
+          if (e < 0 || e > this.i - 1) {
+            throw new RangeError();
+          }
+          let t;
+          let i = 0;
+          for (const s of this) {
+            if (i === e) {
+              t = s;
+              break;
+            }
+            i += 1;
+          }
+          return t;
+        }
+        getHeight() {
+          if (this.i === 0) return 0;
+          const traversal = function(e) {
+            if (!e) return 0;
+            return Math.max(traversal(e.U), traversal(e.W)) + 1;
+          };
+          return traversal(this.Y);
+        }
+      };
+      var _default = TreeContainer;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeIterator.js
+  var require_TreeIterator = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/TreeContainer/Base/TreeIterator.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _ContainerBase = require_ContainerBase();
+      var _throwError = require_throwError();
+      var TreeIterator = class extends _ContainerBase.ContainerIterator {
+        constructor(t, r, i) {
+          super(i);
+          this.o = t;
+          this.h = r;
+          if (this.iteratorType === 0) {
+            this.pre = function() {
+              if (this.o === this.h.U) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.L();
+              return this;
+            };
+            this.next = function() {
+              if (this.o === this.h) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.B();
+              return this;
+            };
+          } else {
+            this.pre = function() {
+              if (this.o === this.h.W) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.B();
+              return this;
+            };
+            this.next = function() {
+              if (this.o === this.h) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.L();
+              return this;
+            };
+          }
+        }
+        get index() {
+          let t = this.o;
+          const r = this.h.tt;
+          if (t === this.h) {
+            if (r) {
+              return r.rt - 1;
+            }
+            return 0;
+          }
+          let i = 0;
+          if (t.U) {
+            i += t.U.rt;
+          }
+          while (t !== r) {
+            const r2 = t.tt;
+            if (t === r2.W) {
+              i += 1;
+              if (r2.U) {
+                i += r2.U.rt;
+              }
+            }
+            t = r2;
+          }
+          return i;
+        }
+      };
+      var _default = TreeIterator;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedSet.js
+  var require_OrderedSet = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedSet.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _Base = _interopRequireDefault(require_Base2());
+      var _TreeIterator = _interopRequireDefault(require_TreeIterator());
+      var _throwError = require_throwError();
+      function _interopRequireDefault(e) {
+        return e && e.t ? e : {
+          default: e
+        };
+      }
+      var OrderedSetIterator = class _OrderedSetIterator extends _TreeIterator.default {
+        constructor(e, t, r, i) {
+          super(e, t, i);
+          this.container = r;
+        }
+        get pointer() {
+          if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+          }
+          return this.o.u;
+        }
+        copy() {
+          return new _OrderedSetIterator(this.o, this.h, this.container, this.iteratorType);
+        }
+      };
+      var OrderedSet = class extends _Base.default {
+        constructor(e = [], t, r) {
+          super(t, r);
+          const i = this;
+          e.forEach((function(e2) {
+            i.insert(e2);
+          }));
+        }
+        *K(e) {
+          if (e === void 0) return;
+          yield* this.K(e.U);
+          yield e.u;
+          yield* this.K(e.W);
+        }
+        begin() {
+          return new OrderedSetIterator(this.h.U || this.h, this.h, this);
+        }
+        end() {
+          return new OrderedSetIterator(this.h, this.h, this);
+        }
+        rBegin() {
+          return new OrderedSetIterator(this.h.W || this.h, this.h, this, 1);
+        }
+        rEnd() {
+          return new OrderedSetIterator(this.h, this.h, this, 1);
+        }
+        front() {
+          return this.h.U ? this.h.U.u : void 0;
+        }
+        back() {
+          return this.h.W ? this.h.W.u : void 0;
+        }
+        insert(e, t) {
+          return this.M(e, void 0, t);
+        }
+        find(e) {
+          const t = this.I(this.Y, e);
+          return new OrderedSetIterator(t, this.h, this);
+        }
+        lowerBound(e) {
+          const t = this.X(this.Y, e);
+          return new OrderedSetIterator(t, this.h, this);
+        }
+        upperBound(e) {
+          const t = this.Z(this.Y, e);
+          return new OrderedSetIterator(t, this.h, this);
+        }
+        reverseLowerBound(e) {
+          const t = this.$(this.Y, e);
+          return new OrderedSetIterator(t, this.h, this);
+        }
+        reverseUpperBound(e) {
+          const t = this.rr(this.Y, e);
+          return new OrderedSetIterator(t, this.h, this);
+        }
+        union(e) {
+          const t = this;
+          e.forEach((function(e2) {
+            t.insert(e2);
+          }));
+          return this.i;
+        }
+        [Symbol.iterator]() {
+          return this.K(this.Y);
+        }
+      };
+      var _default = OrderedSet;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedMap.js
+  var require_OrderedMap = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/TreeContainer/OrderedMap.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _Base = _interopRequireDefault(require_Base2());
+      var _TreeIterator = _interopRequireDefault(require_TreeIterator());
+      var _throwError = require_throwError();
+      function _interopRequireDefault(r) {
+        return r && r.t ? r : {
+          default: r
+        };
+      }
+      var OrderedMapIterator = class _OrderedMapIterator extends _TreeIterator.default {
+        constructor(r, t, e, s) {
+          super(r, t, s);
+          this.container = e;
+        }
+        get pointer() {
+          if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+          }
+          const r = this;
+          return new Proxy([], {
+            get(t, e) {
+              if (e === "0") return r.o.u;
+              else if (e === "1") return r.o.l;
+            },
+            set(t, e, s) {
+              if (e !== "1") {
+                throw new TypeError("props must be 1");
+              }
+              r.o.l = s;
+              return true;
+            }
+          });
+        }
+        copy() {
+          return new _OrderedMapIterator(this.o, this.h, this.container, this.iteratorType);
+        }
+      };
+      var OrderedMap = class extends _Base.default {
+        constructor(r = [], t, e) {
+          super(t, e);
+          const s = this;
+          r.forEach((function(r2) {
+            s.setElement(r2[0], r2[1]);
+          }));
+        }
+        *K(r) {
+          if (r === void 0) return;
+          yield* this.K(r.U);
+          yield [r.u, r.l];
+          yield* this.K(r.W);
+        }
+        begin() {
+          return new OrderedMapIterator(this.h.U || this.h, this.h, this);
+        }
+        end() {
+          return new OrderedMapIterator(this.h, this.h, this);
+        }
+        rBegin() {
+          return new OrderedMapIterator(this.h.W || this.h, this.h, this, 1);
+        }
+        rEnd() {
+          return new OrderedMapIterator(this.h, this.h, this, 1);
+        }
+        front() {
+          if (this.i === 0) return;
+          const r = this.h.U;
+          return [r.u, r.l];
+        }
+        back() {
+          if (this.i === 0) return;
+          const r = this.h.W;
+          return [r.u, r.l];
+        }
+        lowerBound(r) {
+          const t = this.X(this.Y, r);
+          return new OrderedMapIterator(t, this.h, this);
+        }
+        upperBound(r) {
+          const t = this.Z(this.Y, r);
+          return new OrderedMapIterator(t, this.h, this);
+        }
+        reverseLowerBound(r) {
+          const t = this.$(this.Y, r);
+          return new OrderedMapIterator(t, this.h, this);
+        }
+        reverseUpperBound(r) {
+          const t = this.rr(this.Y, r);
+          return new OrderedMapIterator(t, this.h, this);
+        }
+        setElement(r, t, e) {
+          return this.M(r, t, e);
+        }
+        find(r) {
+          const t = this.I(this.Y, r);
+          return new OrderedMapIterator(t, this.h, this);
+        }
+        getElementByKey(r) {
+          const t = this.I(this.Y, r);
+          return t.l;
+        }
+        union(r) {
+          const t = this;
+          r.forEach((function(r2) {
+            t.setElement(r2[0], r2[1]);
+          }));
+          return this.i;
+        }
+        [Symbol.iterator]() {
+          return this.K(this.Y);
+        }
+      };
+      var _default = OrderedMap;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/utils/checkObject.js
+  var require_checkObject = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/utils/checkObject.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = checkObject;
+      function checkObject(e) {
+        const t = typeof e;
+        return t === "object" && e !== null || t === "function";
+      }
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/HashContainer/Base/index.js
+  var require_Base3 = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/HashContainer/Base/index.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.HashContainerIterator = exports8.HashContainer = void 0;
+      var _ContainerBase = require_ContainerBase();
+      var _checkObject = _interopRequireDefault(require_checkObject());
+      var _throwError = require_throwError();
+      function _interopRequireDefault(t) {
+        return t && t.t ? t : {
+          default: t
+        };
+      }
+      var HashContainerIterator = class extends _ContainerBase.ContainerIterator {
+        constructor(t, e, i) {
+          super(i);
+          this.o = t;
+          this.h = e;
+          if (this.iteratorType === 0) {
+            this.pre = function() {
+              if (this.o.L === this.h) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.L;
+              return this;
+            };
+            this.next = function() {
+              if (this.o === this.h) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.B;
+              return this;
+            };
+          } else {
+            this.pre = function() {
+              if (this.o.B === this.h) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.B;
+              return this;
+            };
+            this.next = function() {
+              if (this.o === this.h) {
+                (0, _throwError.throwIteratorAccessError)();
+              }
+              this.o = this.o.L;
+              return this;
+            };
+          }
+        }
+      };
+      exports8.HashContainerIterator = HashContainerIterator;
+      var HashContainer = class extends _ContainerBase.Container {
+        constructor() {
+          super();
+          this.H = [];
+          this.g = {};
+          this.HASH_TAG = Symbol("@@HASH_TAG");
+          Object.setPrototypeOf(this.g, null);
+          this.h = {};
+          this.h.L = this.h.B = this.p = this._ = this.h;
+        }
+        V(t) {
+          const { L: e, B: i } = t;
+          e.B = i;
+          i.L = e;
+          if (t === this.p) {
+            this.p = i;
+          }
+          if (t === this._) {
+            this._ = e;
+          }
+          this.i -= 1;
+        }
+        M(t, e, i) {
+          if (i === void 0) i = (0, _checkObject.default)(t);
+          let s;
+          if (i) {
+            const i2 = t[this.HASH_TAG];
+            if (i2 !== void 0) {
+              this.H[i2].l = e;
+              return this.i;
+            }
+            Object.defineProperty(t, this.HASH_TAG, {
+              value: this.H.length,
+              configurable: true
+            });
+            s = {
+              u: t,
+              l: e,
+              L: this._,
+              B: this.h
+            };
+            this.H.push(s);
+          } else {
+            const i2 = this.g[t];
+            if (i2) {
+              i2.l = e;
+              return this.i;
+            }
+            s = {
+              u: t,
+              l: e,
+              L: this._,
+              B: this.h
+            };
+            this.g[t] = s;
+          }
+          if (this.i === 0) {
+            this.p = s;
+            this.h.B = s;
+          } else {
+            this._.B = s;
+          }
+          this._ = s;
+          this.h.L = s;
+          return ++this.i;
+        }
+        I(t, e) {
+          if (e === void 0) e = (0, _checkObject.default)(t);
+          if (e) {
+            const e2 = t[this.HASH_TAG];
+            if (e2 === void 0) return this.h;
+            return this.H[e2];
+          } else {
+            return this.g[t] || this.h;
+          }
+        }
+        clear() {
+          const t = this.HASH_TAG;
+          this.H.forEach((function(e) {
+            delete e.u[t];
+          }));
+          this.H = [];
+          this.g = {};
+          Object.setPrototypeOf(this.g, null);
+          this.i = 0;
+          this.p = this._ = this.h.L = this.h.B = this.h;
+        }
+        eraseElementByKey(t, e) {
+          let i;
+          if (e === void 0) e = (0, _checkObject.default)(t);
+          if (e) {
+            const e2 = t[this.HASH_TAG];
+            if (e2 === void 0) return false;
+            delete t[this.HASH_TAG];
+            i = this.H[e2];
+            delete this.H[e2];
+          } else {
+            i = this.g[t];
+            if (i === void 0) return false;
+            delete this.g[t];
+          }
+          this.V(i);
+          return true;
+        }
+        eraseElementByIterator(t) {
+          const e = t.o;
+          if (e === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+          }
+          this.V(e);
+          return t.next();
+        }
+        eraseElementByPos(t) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          let e = this.p;
+          while (t--) {
+            e = e.B;
+          }
+          this.V(e);
+          return this.i;
+        }
+      };
+      exports8.HashContainer = HashContainer;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/HashContainer/HashSet.js
+  var require_HashSet = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/HashContainer/HashSet.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _Base = require_Base3();
+      var _throwError = require_throwError();
+      var HashSetIterator = class _HashSetIterator extends _Base.HashContainerIterator {
+        constructor(t, e, r, s) {
+          super(t, e, s);
+          this.container = r;
+        }
+        get pointer() {
+          if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+          }
+          return this.o.u;
+        }
+        copy() {
+          return new _HashSetIterator(this.o, this.h, this.container, this.iteratorType);
+        }
+      };
+      var HashSet = class extends _Base.HashContainer {
+        constructor(t = []) {
+          super();
+          const e = this;
+          t.forEach((function(t2) {
+            e.insert(t2);
+          }));
+        }
+        begin() {
+          return new HashSetIterator(this.p, this.h, this);
+        }
+        end() {
+          return new HashSetIterator(this.h, this.h, this);
+        }
+        rBegin() {
+          return new HashSetIterator(this._, this.h, this, 1);
+        }
+        rEnd() {
+          return new HashSetIterator(this.h, this.h, this, 1);
+        }
+        front() {
+          return this.p.u;
+        }
+        back() {
+          return this._.u;
+        }
+        insert(t, e) {
+          return this.M(t, void 0, e);
+        }
+        getElementByPos(t) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          let e = this.p;
+          while (t--) {
+            e = e.B;
+          }
+          return e.u;
+        }
+        find(t, e) {
+          const r = this.I(t, e);
+          return new HashSetIterator(r, this.h, this);
+        }
+        forEach(t) {
+          let e = 0;
+          let r = this.p;
+          while (r !== this.h) {
+            t(r.u, e++, this);
+            r = r.B;
+          }
+        }
+        [Symbol.iterator]() {
+          return function* () {
+            let t = this.p;
+            while (t !== this.h) {
+              yield t.u;
+              t = t.B;
+            }
+          }.bind(this)();
+        }
+      };
+      var _default = HashSet;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/container/HashContainer/HashMap.js
+  var require_HashMap = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/container/HashContainer/HashMap.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      exports8.default = void 0;
+      var _Base = require_Base3();
+      var _checkObject = _interopRequireDefault(require_checkObject());
+      var _throwError = require_throwError();
+      function _interopRequireDefault(t) {
+        return t && t.t ? t : {
+          default: t
+        };
+      }
+      var HashMapIterator = class _HashMapIterator extends _Base.HashContainerIterator {
+        constructor(t, e, r, s) {
+          super(t, e, s);
+          this.container = r;
+        }
+        get pointer() {
+          if (this.o === this.h) {
+            (0, _throwError.throwIteratorAccessError)();
+          }
+          const t = this;
+          return new Proxy([], {
+            get(e, r) {
+              if (r === "0") return t.o.u;
+              else if (r === "1") return t.o.l;
+            },
+            set(e, r, s) {
+              if (r !== "1") {
+                throw new TypeError("props must be 1");
+              }
+              t.o.l = s;
+              return true;
+            }
+          });
+        }
+        copy() {
+          return new _HashMapIterator(this.o, this.h, this.container, this.iteratorType);
+        }
+      };
+      var HashMap = class extends _Base.HashContainer {
+        constructor(t = []) {
+          super();
+          const e = this;
+          t.forEach((function(t2) {
+            e.setElement(t2[0], t2[1]);
+          }));
+        }
+        begin() {
+          return new HashMapIterator(this.p, this.h, this);
+        }
+        end() {
+          return new HashMapIterator(this.h, this.h, this);
+        }
+        rBegin() {
+          return new HashMapIterator(this._, this.h, this, 1);
+        }
+        rEnd() {
+          return new HashMapIterator(this.h, this.h, this, 1);
+        }
+        front() {
+          if (this.i === 0) return;
+          return [this.p.u, this.p.l];
+        }
+        back() {
+          if (this.i === 0) return;
+          return [this._.u, this._.l];
+        }
+        setElement(t, e, r) {
+          return this.M(t, e, r);
+        }
+        getElementByKey(t, e) {
+          if (e === void 0) e = (0, _checkObject.default)(t);
+          if (e) {
+            const e2 = t[this.HASH_TAG];
+            return e2 !== void 0 ? this.H[e2].l : void 0;
+          }
+          const r = this.g[t];
+          return r ? r.l : void 0;
+        }
+        getElementByPos(t) {
+          if (t < 0 || t > this.i - 1) {
+            throw new RangeError();
+          }
+          let e = this.p;
+          while (t--) {
+            e = e.B;
+          }
+          return [e.u, e.l];
+        }
+        find(t, e) {
+          const r = this.I(t, e);
+          return new HashMapIterator(r, this.h, this);
+        }
+        forEach(t) {
+          let e = 0;
+          let r = this.p;
+          while (r !== this.h) {
+            t([r.u, r.l], e++, this);
+            r = r.B;
+          }
+        }
+        [Symbol.iterator]() {
+          return function* () {
+            let t = this.p;
+            while (t !== this.h) {
+              yield [t.u, t.l];
+              t = t.B;
+            }
+          }.bind(this)();
+        }
+      };
+      var _default = HashMap;
+      exports8.default = _default;
+    }
+  });
+
+  // node_modules/js-sdsl/dist/cjs/index.js
+  var require_cjs = __commonJS({
+    "node_modules/js-sdsl/dist/cjs/index.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "t", {
+        value: true
+      });
+      Object.defineProperty(exports8, "Deque", {
+        enumerable: true,
+        get: function() {
+          return _Deque.default;
+        }
+      });
+      Object.defineProperty(exports8, "HashMap", {
+        enumerable: true,
+        get: function() {
+          return _HashMap.default;
+        }
+      });
+      Object.defineProperty(exports8, "HashSet", {
+        enumerable: true,
+        get: function() {
+          return _HashSet.default;
+        }
+      });
+      Object.defineProperty(exports8, "LinkList", {
+        enumerable: true,
+        get: function() {
+          return _LinkList.default;
+        }
+      });
+      Object.defineProperty(exports8, "OrderedMap", {
+        enumerable: true,
+        get: function() {
+          return _OrderedMap.default;
+        }
+      });
+      Object.defineProperty(exports8, "OrderedSet", {
+        enumerable: true,
+        get: function() {
+          return _OrderedSet.default;
+        }
+      });
+      Object.defineProperty(exports8, "PriorityQueue", {
+        enumerable: true,
+        get: function() {
+          return _PriorityQueue.default;
+        }
+      });
+      Object.defineProperty(exports8, "Queue", {
+        enumerable: true,
+        get: function() {
+          return _Queue.default;
+        }
+      });
+      Object.defineProperty(exports8, "Stack", {
+        enumerable: true,
+        get: function() {
+          return _Stack.default;
+        }
+      });
+      Object.defineProperty(exports8, "Vector", {
+        enumerable: true,
+        get: function() {
+          return _Vector.default;
+        }
+      });
+      var _Stack = _interopRequireDefault(require_Stack());
+      var _Queue = _interopRequireDefault(require_Queue());
+      var _PriorityQueue = _interopRequireDefault(require_PriorityQueue());
+      var _Vector = _interopRequireDefault(require_Vector());
+      var _LinkList = _interopRequireDefault(require_LinkList());
+      var _Deque = _interopRequireDefault(require_Deque());
+      var _OrderedSet = _interopRequireDefault(require_OrderedSet());
+      var _OrderedMap = _interopRequireDefault(require_OrderedMap());
+      var _HashSet = _interopRequireDefault(require_HashSet());
+      var _HashMap = _interopRequireDefault(require_HashMap());
+      function _interopRequireDefault(e) {
+        return e && e.t ? e : {
+          default: e
+        };
+      }
+    }
+  });
+
+  // node_modules/number-allocator/lib/number-allocator.js
+  var require_number_allocator = __commonJS({
+    "node_modules/number-allocator/lib/number-allocator.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var SortedSet = require_cjs().OrderedSet;
+      var debugTrace = require_browser4()("number-allocator:trace");
+      var debugError = require_browser4()("number-allocator:error");
+      function Interval(low, high) {
+        this.low = low;
+        this.high = high;
+      }
+      Interval.prototype.equals = function(other) {
+        return this.low === other.low && this.high === other.high;
+      };
+      Interval.prototype.compare = function(other) {
+        if (this.low < other.low && this.high < other.low) return -1;
+        if (other.low < this.low && other.high < this.low) return 1;
+        return 0;
+      };
+      function NumberAllocator(min, max) {
+        if (!(this instanceof NumberAllocator)) {
+          return new NumberAllocator(min, max);
+        }
+        this.min = min;
+        this.max = max;
+        this.ss = new SortedSet(
+          [],
+          (lhs, rhs) => {
+            return lhs.compare(rhs);
+          }
+        );
+        debugTrace("Create");
+        this.clear();
+      }
+      NumberAllocator.prototype.firstVacant = function() {
+        if (this.ss.size() === 0) return null;
+        return this.ss.front().low;
+      };
+      NumberAllocator.prototype.alloc = function() {
+        if (this.ss.size() === 0) {
+          debugTrace("alloc():empty");
+          return null;
+        }
+        const it = this.ss.begin();
+        const low = it.pointer.low;
+        const high = it.pointer.high;
+        const num = low;
+        if (num + 1 <= high) {
+          this.ss.updateKeyByIterator(it, new Interval(low + 1, high));
+        } else {
+          this.ss.eraseElementByPos(0);
+        }
+        debugTrace("alloc():" + num);
+        return num;
+      };
+      NumberAllocator.prototype.use = function(num) {
+        const key = new Interval(num, num);
+        const it = this.ss.lowerBound(key);
+        if (!it.equals(this.ss.end())) {
+          const low = it.pointer.low;
+          const high = it.pointer.high;
+          if (it.pointer.equals(key)) {
+            this.ss.eraseElementByIterator(it);
+            debugTrace("use():" + num);
+            return true;
+          }
+          if (low > num) return false;
+          if (low === num) {
+            this.ss.updateKeyByIterator(it, new Interval(low + 1, high));
+            debugTrace("use():" + num);
+            return true;
+          }
+          if (high === num) {
+            this.ss.updateKeyByIterator(it, new Interval(low, high - 1));
+            debugTrace("use():" + num);
+            return true;
+          }
+          this.ss.updateKeyByIterator(it, new Interval(num + 1, high));
+          this.ss.insert(new Interval(low, num - 1));
+          debugTrace("use():" + num);
+          return true;
+        }
+        debugTrace("use():failed");
+        return false;
+      };
+      NumberAllocator.prototype.free = function(num) {
+        if (num < this.min || num > this.max) {
+          debugError("free():" + num + " is out of range");
+          return;
+        }
+        const key = new Interval(num, num);
+        const it = this.ss.upperBound(key);
+        if (it.equals(this.ss.end())) {
+          if (it.equals(this.ss.begin())) {
+            this.ss.insert(key);
+            return;
+          }
+          it.pre();
+          const low = it.pointer.high;
+          const high = it.pointer.high;
+          if (high + 1 === num) {
+            this.ss.updateKeyByIterator(it, new Interval(low, num));
+          } else {
+            this.ss.insert(key);
+          }
+        } else {
+          if (it.equals(this.ss.begin())) {
+            if (num + 1 === it.pointer.low) {
+              const high = it.pointer.high;
+              this.ss.updateKeyByIterator(it, new Interval(num, high));
+            } else {
+              this.ss.insert(key);
+            }
+          } else {
+            const rLow = it.pointer.low;
+            const rHigh = it.pointer.high;
+            it.pre();
+            const lLow = it.pointer.low;
+            const lHigh = it.pointer.high;
+            if (lHigh + 1 === num) {
+              if (num + 1 === rLow) {
+                this.ss.eraseElementByIterator(it);
+                this.ss.updateKeyByIterator(it, new Interval(lLow, rHigh));
+              } else {
+                this.ss.updateKeyByIterator(it, new Interval(lLow, num));
+              }
+            } else {
+              if (num + 1 === rLow) {
+                this.ss.eraseElementByIterator(it.next());
+                this.ss.insert(new Interval(num, rHigh));
+              } else {
+                this.ss.insert(key);
+              }
+            }
+          }
+        }
+        debugTrace("free():" + num);
+      };
+      NumberAllocator.prototype.clear = function() {
+        debugTrace("clear()");
+        this.ss.clear();
+        this.ss.insert(new Interval(this.min, this.max));
+      };
+      NumberAllocator.prototype.intervalCount = function() {
+        return this.ss.size();
+      };
+      NumberAllocator.prototype.dump = function() {
+        console.log("length:" + this.ss.size());
+        for (const element of this.ss) {
+          console.log(element);
+        }
+      };
+      module.exports = NumberAllocator;
+    }
+  });
+
+  // node_modules/number-allocator/index.js
+  var require_number_allocator2 = __commonJS({
+    "node_modules/number-allocator/index.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var NumberAllocator = require_number_allocator();
+      module.exports.NumberAllocator = NumberAllocator;
+    }
+  });
+
+  // build/lib/topic-alias-send.js
+  var require_topic_alias_send = __commonJS({
+    "build/lib/topic-alias-send.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var lru_cache_1 = require_commonjs();
+      var number_allocator_1 = require_number_allocator2();
+      var TopicAliasSend = class {
+        aliasToTopic;
+        topicToAlias;
+        max;
+        numberAllocator;
+        length;
+        constructor(max) {
+          if (max > 0) {
+            this.aliasToTopic = new lru_cache_1.LRUCache({ max });
+            this.topicToAlias = {};
+            this.numberAllocator = new number_allocator_1.NumberAllocator(1, max);
+            this.max = max;
+            this.length = 0;
+          }
+        }
+        put(topic, alias) {
+          if (alias === 0 || alias > this.max) {
+            return false;
+          }
+          const entry = this.aliasToTopic.get(alias);
+          if (entry) {
+            delete this.topicToAlias[entry];
+          }
+          this.aliasToTopic.set(alias, topic);
+          this.topicToAlias[topic] = alias;
+          this.numberAllocator.use(alias);
+          this.length = this.aliasToTopic.size;
+          return true;
+        }
+        getTopicByAlias(alias) {
+          return this.aliasToTopic.get(alias);
+        }
+        getAliasByTopic(topic) {
+          const alias = this.topicToAlias[topic];
+          if (typeof alias !== "undefined") {
+            this.aliasToTopic.get(alias);
+          }
+          return alias;
+        }
+        clear() {
+          this.aliasToTopic.clear();
+          this.topicToAlias = {};
+          this.numberAllocator.clear();
+          this.length = 0;
+        }
+        getLruAlias() {
+          const alias = this.numberAllocator.firstVacant();
+          if (alias)
+            return alias;
+          return [...this.aliasToTopic.keys()][this.aliasToTopic.size - 1];
+        }
+      };
+      exports8.default = TopicAliasSend;
+    }
+  });
+
+  // build/lib/handlers/connack.js
+  var require_connack = __commonJS({
+    "build/lib/handlers/connack.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __importDefault = exports8 && exports8.__importDefault || function(mod) {
+        return mod && mod.__esModule ? mod : { "default": mod };
+      };
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var ack_1 = require_ack();
+      var topic_alias_send_1 = __importDefault(require_topic_alias_send());
+      var shared_1 = require_shared();
+      var handleConnack = (client, packet) => {
+        client.log("_handleConnack");
+        const { options } = client;
+        const version4 = options.protocolVersion;
+        const rc = version4 === 5 ? packet.reasonCode : packet.returnCode;
+        clearTimeout(client["connackTimer"]);
+        delete client["topicAliasSend"];
+        if (packet.properties) {
+          if (packet.properties.topicAliasMaximum) {
+            if (packet.properties.topicAliasMaximum > 65535) {
+              client.emit("error", new Error("topicAliasMaximum from broker is out of range"));
+              return;
+            }
+            if (packet.properties.topicAliasMaximum > 0) {
+              client["topicAliasSend"] = new topic_alias_send_1.default(packet.properties.topicAliasMaximum);
+            }
+          }
+          if (packet.properties.serverKeepAlive && options.keepalive) {
+            options.keepalive = packet.properties.serverKeepAlive;
+          }
+          if (packet.properties.maximumPacketSize) {
+            if (!options.properties) {
+              options.properties = {};
+            }
+            options.properties.maximumPacketSize = packet.properties.maximumPacketSize;
+          }
+        }
+        if (rc === 0) {
+          client.reconnecting = false;
+          client["_onConnect"](packet);
+        } else if (rc > 0) {
+          const err = new shared_1.ErrorWithReasonCode(`Connection refused: ${ack_1.ReasonCodes[rc]}`, rc);
+          client.emit("error", err);
+          if (client.options.reconnectOnConnackError) {
+            client["_cleanUp"](true);
+          }
+        }
+      };
+      exports8.default = handleConnack;
+    }
+  });
+
+  // build/lib/handlers/pubrel.js
+  var require_pubrel = __commonJS({
+    "build/lib/handlers/pubrel.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var handlePubrel = (client, packet, done) => {
+        client.log("handling pubrel packet");
+        const callback = typeof done !== "undefined" ? done : client.noop;
+        const { messageId } = packet;
+        const comp = { cmd: "pubcomp", messageId };
+        client.incomingStore.get(packet, (err, pub) => {
+          if (!err) {
+            client.emit("message", pub.topic, pub.payload, pub);
+            client.handleMessage(pub, (err2) => {
+              if (err2) {
+                return callback(err2);
+              }
+              client.incomingStore.del(pub, client.noop);
+              client["_sendPacket"](comp, callback);
+            });
+          } else {
+            client["_sendPacket"](comp, callback);
+          }
+        });
+      };
+      exports8.default = handlePubrel;
+    }
+  });
+
+  // build/lib/handlers/index.js
+  var require_handlers = __commonJS({
+    "build/lib/handlers/index.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __importDefault = exports8 && exports8.__importDefault || function(mod) {
+        return mod && mod.__esModule ? mod : { "default": mod };
+      };
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var publish_1 = __importDefault(require_publish());
+      var auth_1 = __importDefault(require_auth());
+      var connack_1 = __importDefault(require_connack());
+      var ack_1 = __importDefault(require_ack());
+      var pubrel_1 = __importDefault(require_pubrel());
+      var handle = (client, packet, done) => {
+        const { options } = client;
+        if (options.protocolVersion === 5 && options.properties && options.properties.maximumPacketSize && options.properties.maximumPacketSize < packet.length) {
+          client.emit("error", new Error(`exceeding packets size ${packet.cmd}`));
+          client.end({
+            reasonCode: 149,
+            properties: { reasonString: "Maximum packet size was exceeded" }
+          });
+          return client;
+        }
+        client.log("_handlePacket :: emitting packetreceive");
+        client.emit("packetreceive", packet);
+        switch (packet.cmd) {
+          case "publish":
+            (0, publish_1.default)(client, packet, done);
+            break;
+          case "puback":
+          case "pubrec":
+          case "pubcomp":
+          case "suback":
+          case "unsuback":
+            client.reschedulePing();
+            (0, ack_1.default)(client, packet);
+            done();
+            break;
+          case "pubrel":
+            client.reschedulePing();
+            (0, pubrel_1.default)(client, packet, done);
+            break;
+          case "connack":
+            (0, connack_1.default)(client, packet);
+            done();
+            break;
+          case "auth":
+            client.reschedulePing();
+            (0, auth_1.default)(client, packet);
+            done();
+            break;
+          case "pingresp":
+            client.log("_handlePacket :: received pingresp");
+            client.reschedulePing(true);
+            done();
+            break;
+          case "disconnect":
+            client.emit("disconnect", packet);
+            done();
+            break;
+          default:
+            client.log("_handlePacket :: unknown command");
+            done();
+            break;
+        }
+      };
+      exports8.default = handle;
+    }
+  });
+
+  // build/lib/default-message-id-provider.js
+  var require_default_message_id_provider = __commonJS({
+    "build/lib/default-message-id-provider.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var DefaultMessageIdProvider = class {
+        nextId;
+        constructor() {
+          this.nextId = Math.max(1, Math.floor(Math.random() * 65535));
+        }
+        allocate() {
+          const id = this.nextId++;
+          if (this.nextId === 65536) {
+            this.nextId = 1;
+          }
+          return id;
+        }
+        getLastAllocated() {
+          return this.nextId === 1 ? 65535 : this.nextId - 1;
+        }
+        register(messageId) {
+          return true;
+        }
+        deallocate(messageId) {
+        }
+        clear() {
+        }
+      };
+      exports8.default = DefaultMessageIdProvider;
+    }
+  });
+
+  // build/lib/topic-alias-recv.js
+  var require_topic_alias_recv = __commonJS({
+    "build/lib/topic-alias-recv.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var TopicAliasRecv = class {
+        aliasToTopic;
+        max;
+        length;
+        constructor(max) {
+          this.aliasToTopic = {};
+          this.max = max;
+        }
+        put(topic, alias) {
+          if (alias === 0 || alias > this.max) {
+            return false;
+          }
+          this.aliasToTopic[alias] = topic;
+          this.length = Object.keys(this.aliasToTopic).length;
+          return true;
+        }
+        getTopicByAlias(alias) {
+          return this.aliasToTopic[alias];
+        }
+        clear() {
+          this.aliasToTopic = {};
+        }
+      };
+      exports8.default = TopicAliasRecv;
+    }
+  });
+
+  // build/lib/TypedEmitter.js
+  var require_TypedEmitter = __commonJS({
+    "build/lib/TypedEmitter.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __importDefault = exports8 && exports8.__importDefault || function(mod) {
+        return mod && mod.__esModule ? mod : { "default": mod };
+      };
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      exports8.TypedEventEmitter = void 0;
+      var events_1 = __importDefault((init_events(), __toCommonJS(events_exports)));
+      var shared_1 = require_shared();
+      var TypedEventEmitter = class {
+      };
+      exports8.TypedEventEmitter = TypedEventEmitter;
+      (0, shared_1.applyMixin)(TypedEventEmitter, events_1.default);
+    }
+  });
+
+  // node_modules/fast-unique-numbers/build/es5/bundle.js
+  var require_bundle = __commonJS({
+    "node_modules/fast-unique-numbers/build/es5/bundle.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      (function(global2, factory) {
+        typeof exports8 === "object" && typeof module !== "undefined" ? factory(exports8) : typeof define === "function" && define.amd ? define(["exports"], factory) : (global2 = typeof globalThis !== "undefined" ? globalThis : global2 || self, factory(global2.fastUniqueNumbers = {}));
+      })(exports8, (function(exports9) {
+        "use strict";
+        var createAddUniqueNumber = function createAddUniqueNumber2(generateUniqueNumber2) {
+          return function(set) {
+            var number = generateUniqueNumber2(set);
+            set.add(number);
+            return number;
+          };
+        };
+        var createCache = function createCache2(lastNumberWeakMap) {
+          return function(collection, nextNumber) {
+            lastNumberWeakMap.set(collection, nextNumber);
+            return nextNumber;
+          };
+        };
+        var MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER === void 0 ? 9007199254740991 : Number.MAX_SAFE_INTEGER;
+        var TWO_TO_THE_POWER_OF_TWENTY_NINE = 536870912;
+        var TWO_TO_THE_POWER_OF_THIRTY = TWO_TO_THE_POWER_OF_TWENTY_NINE * 2;
+        var createGenerateUniqueNumber = function createGenerateUniqueNumber2(cache2, lastNumberWeakMap) {
+          return function(collection) {
+            var lastNumber = lastNumberWeakMap.get(collection);
+            var nextNumber = lastNumber === void 0 ? collection.size : lastNumber < TWO_TO_THE_POWER_OF_THIRTY ? lastNumber + 1 : 0;
+            if (!collection.has(nextNumber)) {
+              return cache2(collection, nextNumber);
+            }
+            if (collection.size < TWO_TO_THE_POWER_OF_TWENTY_NINE) {
+              while (collection.has(nextNumber)) {
+                nextNumber = Math.floor(Math.random() * TWO_TO_THE_POWER_OF_THIRTY);
+              }
+              return cache2(collection, nextNumber);
+            }
+            if (collection.size > MAX_SAFE_INTEGER) {
+              throw new Error("Congratulations, you created a collection of unique numbers which uses all available integers!");
+            }
+            while (collection.has(nextNumber)) {
+              nextNumber = Math.floor(Math.random() * MAX_SAFE_INTEGER);
+            }
+            return cache2(collection, nextNumber);
+          };
+        };
+        var LAST_NUMBER_WEAK_MAP = /* @__PURE__ */ new WeakMap();
+        var cache = createCache(LAST_NUMBER_WEAK_MAP);
+        var generateUniqueNumber = createGenerateUniqueNumber(cache, LAST_NUMBER_WEAK_MAP);
+        var addUniqueNumber = createAddUniqueNumber(generateUniqueNumber);
+        exports9.addUniqueNumber = addUniqueNumber;
+        exports9.generateUniqueNumber = generateUniqueNumber;
+      }));
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/typeof.js
+  var require_typeof = __commonJS({
+    "node_modules/@babel/runtime/helpers/typeof.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      function _typeof(o) {
+        "@babel/helpers - typeof";
+        return module.exports = _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function(o2) {
+          return typeof o2;
+        } : function(o2) {
+          return o2 && "function" == typeof Symbol && o2.constructor === Symbol && o2 !== Symbol.prototype ? "symbol" : typeof o2;
+        }, module.exports.__esModule = true, module.exports["default"] = module.exports, _typeof(o);
+      }
+      module.exports = _typeof, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/toPrimitive.js
+  var require_toPrimitive = __commonJS({
+    "node_modules/@babel/runtime/helpers/toPrimitive.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var _typeof = require_typeof()["default"];
+      function toPrimitive(t, r) {
+        if ("object" != _typeof(t) || !t) return t;
+        var e = t[Symbol.toPrimitive];
+        if (void 0 !== e) {
+          var i = e.call(t, r || "default");
+          if ("object" != _typeof(i)) return i;
+          throw new TypeError("@@toPrimitive must return a primitive value.");
+        }
+        return ("string" === r ? String : Number)(t);
+      }
+      module.exports = toPrimitive, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/toPropertyKey.js
+  var require_toPropertyKey = __commonJS({
+    "node_modules/@babel/runtime/helpers/toPropertyKey.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var _typeof = require_typeof()["default"];
+      var toPrimitive = require_toPrimitive();
+      function toPropertyKey(t) {
+        var i = toPrimitive(t, "string");
+        return "symbol" == _typeof(i) ? i : i + "";
+      }
+      module.exports = toPropertyKey, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/defineProperty.js
+  var require_defineProperty = __commonJS({
+    "node_modules/@babel/runtime/helpers/defineProperty.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var toPropertyKey = require_toPropertyKey();
+      function _defineProperty(e, r, t) {
+        return (r = toPropertyKey(r)) in e ? Object.defineProperty(e, r, {
+          value: t,
+          enumerable: true,
+          configurable: true,
+          writable: true
+        }) : e[r] = t, e;
+      }
+      module.exports = _defineProperty, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/arrayWithHoles.js
+  var require_arrayWithHoles = __commonJS({
+    "node_modules/@babel/runtime/helpers/arrayWithHoles.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      function _arrayWithHoles(r) {
+        if (Array.isArray(r)) return r;
+      }
+      module.exports = _arrayWithHoles, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/iterableToArrayLimit.js
+  var require_iterableToArrayLimit = __commonJS({
+    "node_modules/@babel/runtime/helpers/iterableToArrayLimit.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      function _iterableToArrayLimit(r, l) {
+        var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
+        if (null != t) {
+          var e, n, i, u, a = [], f = true, o = false;
+          try {
+            if (i = (t = t.call(r)).next, 0 === l) {
+              if (Object(t) !== t) return;
+              f = false;
+            } else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = true) ;
+          } catch (r2) {
+            o = true, n = r2;
+          } finally {
+            try {
+              if (!f && null != t["return"] && (u = t["return"](), Object(u) !== u)) return;
+            } finally {
+              if (o) throw n;
+            }
+          }
+          return a;
+        }
+      }
+      module.exports = _iterableToArrayLimit, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/arrayLikeToArray.js
+  var require_arrayLikeToArray = __commonJS({
+    "node_modules/@babel/runtime/helpers/arrayLikeToArray.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      function _arrayLikeToArray(r, a) {
+        (null == a || a > r.length) && (a = r.length);
+        for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e];
+        return n;
+      }
+      module.exports = _arrayLikeToArray, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/unsupportedIterableToArray.js
+  var require_unsupportedIterableToArray = __commonJS({
+    "node_modules/@babel/runtime/helpers/unsupportedIterableToArray.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var arrayLikeToArray = require_arrayLikeToArray();
+      function _unsupportedIterableToArray(r, a) {
+        if (r) {
+          if ("string" == typeof r) return arrayLikeToArray(r, a);
+          var t = {}.toString.call(r).slice(8, -1);
+          return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? arrayLikeToArray(r, a) : void 0;
+        }
+      }
+      module.exports = _unsupportedIterableToArray, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/nonIterableRest.js
+  var require_nonIterableRest = __commonJS({
+    "node_modules/@babel/runtime/helpers/nonIterableRest.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      function _nonIterableRest() {
+        throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+      }
+      module.exports = _nonIterableRest, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/slicedToArray.js
+  var require_slicedToArray = __commonJS({
+    "node_modules/@babel/runtime/helpers/slicedToArray.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var arrayWithHoles = require_arrayWithHoles();
+      var iterableToArrayLimit = require_iterableToArrayLimit();
+      var unsupportedIterableToArray = require_unsupportedIterableToArray();
+      var nonIterableRest = require_nonIterableRest();
+      function _slicedToArray(r, e) {
+        return arrayWithHoles(r) || iterableToArrayLimit(r, e) || unsupportedIterableToArray(r, e) || nonIterableRest();
+      }
+      module.exports = _slicedToArray, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/asyncToGenerator.js
+  var require_asyncToGenerator = __commonJS({
+    "node_modules/@babel/runtime/helpers/asyncToGenerator.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      function asyncGeneratorStep(n, t, e, r, o, a, c) {
+        try {
+          var i = n[a](c), u = i.value;
+        } catch (n2) {
+          return void e(n2);
+        }
+        i.done ? t(u) : Promise.resolve(u).then(r, o);
+      }
+      function _asyncToGenerator(n) {
+        return function() {
+          var t = this, e = arguments;
+          return new Promise(function(r, o) {
+            var a = n.apply(t, e);
+            function _next(n2) {
+              asyncGeneratorStep(a, r, o, _next, _throw, "next", n2);
+            }
+            function _throw(n2) {
+              asyncGeneratorStep(a, r, o, _next, _throw, "throw", n2);
+            }
+            _next(void 0);
+          });
+        };
+      }
+      module.exports = _asyncToGenerator, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/OverloadYield.js
+  var require_OverloadYield = __commonJS({
+    "node_modules/@babel/runtime/helpers/OverloadYield.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      function _OverloadYield(e, d) {
+        this.v = e, this.k = d;
+      }
+      module.exports = _OverloadYield, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/regeneratorDefine.js
+  var require_regeneratorDefine = __commonJS({
+    "node_modules/@babel/runtime/helpers/regeneratorDefine.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      function _regeneratorDefine(e, r, n, t) {
+        var i = Object.defineProperty;
+        try {
+          i({}, "", {});
+        } catch (e2) {
+          i = 0;
+        }
+        module.exports = _regeneratorDefine = function regeneratorDefine(e2, r2, n2, t2) {
+          function o(r3, n3) {
+            _regeneratorDefine(e2, r3, function(e3) {
+              return this._invoke(r3, n3, e3);
+            });
+          }
+          r2 ? i ? i(e2, r2, {
+            value: n2,
+            enumerable: !t2,
+            configurable: !t2,
+            writable: !t2
+          }) : e2[r2] = n2 : (o("next", 0), o("throw", 1), o("return", 2));
+        }, module.exports.__esModule = true, module.exports["default"] = module.exports, _regeneratorDefine(e, r, n, t);
+      }
+      module.exports = _regeneratorDefine, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/regenerator.js
+  var require_regenerator = __commonJS({
+    "node_modules/@babel/runtime/helpers/regenerator.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var regeneratorDefine = require_regeneratorDefine();
+      function _regenerator() {
+        var e, t, r = "function" == typeof Symbol ? Symbol : {}, n = r.iterator || "@@iterator", o = r.toStringTag || "@@toStringTag";
+        function i(r2, n2, o2, i2) {
+          var c2 = n2 && n2.prototype instanceof Generator ? n2 : Generator, u2 = Object.create(c2.prototype);
+          return regeneratorDefine(u2, "_invoke", (function(r3, n3, o3) {
+            var i3, c3, u3, f2 = 0, p = o3 || [], y = false, G = {
+              p: 0,
+              n: 0,
+              v: e,
+              a: d,
+              f: d.bind(e, 4),
+              d: function d2(t2, r4) {
+                return i3 = t2, c3 = 0, u3 = e, G.n = r4, a;
+              }
+            };
+            function d(r4, n4) {
+              for (c3 = r4, u3 = n4, t = 0; !y && f2 && !o4 && t < p.length; t++) {
+                var o4, i4 = p[t], d2 = G.p, l = i4[2];
+                r4 > 3 ? (o4 = l === n4) && (u3 = i4[(c3 = i4[4]) ? 5 : (c3 = 3, 3)], i4[4] = i4[5] = e) : i4[0] <= d2 && ((o4 = r4 < 2 && d2 < i4[1]) ? (c3 = 0, G.v = n4, G.n = i4[1]) : d2 < l && (o4 = r4 < 3 || i4[0] > n4 || n4 > l) && (i4[4] = r4, i4[5] = n4, G.n = l, c3 = 0));
+              }
+              if (o4 || r4 > 1) return a;
+              throw y = true, n4;
+            }
+            return function(o4, p2, l) {
+              if (f2 > 1) throw TypeError("Generator is already running");
+              for (y && 1 === p2 && d(p2, l), c3 = p2, u3 = l; (t = c3 < 2 ? e : u3) || !y; ) {
+                i3 || (c3 ? c3 < 3 ? (c3 > 1 && (G.n = -1), d(c3, u3)) : G.n = u3 : G.v = u3);
+                try {
+                  if (f2 = 2, i3) {
+                    if (c3 || (o4 = "next"), t = i3[o4]) {
+                      if (!(t = t.call(i3, u3))) throw TypeError("iterator result is not an object");
+                      if (!t.done) return t;
+                      u3 = t.value, c3 < 2 && (c3 = 0);
+                    } else 1 === c3 && (t = i3["return"]) && t.call(i3), c3 < 2 && (u3 = TypeError("The iterator does not provide a '" + o4 + "' method"), c3 = 1);
+                    i3 = e;
+                  } else if ((t = (y = G.n < 0) ? u3 : r3.call(n3, G)) !== a) break;
+                } catch (t2) {
+                  i3 = e, c3 = 1, u3 = t2;
+                } finally {
+                  f2 = 1;
+                }
+              }
+              return {
+                value: t,
+                done: y
+              };
+            };
+          })(r2, o2, i2), true), u2;
+        }
+        var a = {};
+        function Generator() {
+        }
+        function GeneratorFunction() {
+        }
+        function GeneratorFunctionPrototype() {
+        }
+        t = Object.getPrototypeOf;
+        var c = [][n] ? t(t([][n]())) : (regeneratorDefine(t = {}, n, function() {
+          return this;
+        }), t), u = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(c);
+        function f(e2) {
+          return Object.setPrototypeOf ? Object.setPrototypeOf(e2, GeneratorFunctionPrototype) : (e2.__proto__ = GeneratorFunctionPrototype, regeneratorDefine(e2, o, "GeneratorFunction")), e2.prototype = Object.create(u), e2;
+        }
+        return GeneratorFunction.prototype = GeneratorFunctionPrototype, regeneratorDefine(u, "constructor", GeneratorFunctionPrototype), regeneratorDefine(GeneratorFunctionPrototype, "constructor", GeneratorFunction), GeneratorFunction.displayName = "GeneratorFunction", regeneratorDefine(GeneratorFunctionPrototype, o, "GeneratorFunction"), regeneratorDefine(u), regeneratorDefine(u, o, "Generator"), regeneratorDefine(u, n, function() {
+          return this;
+        }), regeneratorDefine(u, "toString", function() {
+          return "[object Generator]";
+        }), (module.exports = _regenerator = function _regenerator2() {
+          return {
+            w: i,
+            m: f
+          };
+        }, module.exports.__esModule = true, module.exports["default"] = module.exports)();
+      }
+      module.exports = _regenerator, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/regeneratorAsyncIterator.js
+  var require_regeneratorAsyncIterator = __commonJS({
+    "node_modules/@babel/runtime/helpers/regeneratorAsyncIterator.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var OverloadYield = require_OverloadYield();
+      var regeneratorDefine = require_regeneratorDefine();
+      function AsyncIterator(t, e) {
+        function n(r2, o, i, f) {
+          try {
+            var c = t[r2](o), u = c.value;
+            return u instanceof OverloadYield ? e.resolve(u.v).then(function(t2) {
+              n("next", t2, i, f);
+            }, function(t2) {
+              n("throw", t2, i, f);
+            }) : e.resolve(u).then(function(t2) {
+              c.value = t2, i(c);
+            }, function(t2) {
+              return n("throw", t2, i, f);
+            });
+          } catch (t2) {
+            f(t2);
+          }
+        }
+        var r;
+        this.next || (regeneratorDefine(AsyncIterator.prototype), regeneratorDefine(AsyncIterator.prototype, "function" == typeof Symbol && Symbol.asyncIterator || "@asyncIterator", function() {
+          return this;
+        })), regeneratorDefine(this, "_invoke", function(t2, o, i) {
+          function f() {
+            return new e(function(e2, r2) {
+              n(t2, i, e2, r2);
+            });
+          }
+          return r = r ? r.then(f, f) : f();
+        }, true);
+      }
+      module.exports = AsyncIterator, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/regeneratorAsyncGen.js
+  var require_regeneratorAsyncGen = __commonJS({
+    "node_modules/@babel/runtime/helpers/regeneratorAsyncGen.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var regenerator = require_regenerator();
+      var regeneratorAsyncIterator = require_regeneratorAsyncIterator();
+      function _regeneratorAsyncGen(r, e, t, o, n) {
+        return new regeneratorAsyncIterator(regenerator().w(r, e, t, o), n || Promise);
+      }
+      module.exports = _regeneratorAsyncGen, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/regeneratorAsync.js
+  var require_regeneratorAsync = __commonJS({
+    "node_modules/@babel/runtime/helpers/regeneratorAsync.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var regeneratorAsyncGen = require_regeneratorAsyncGen();
+      function _regeneratorAsync(n, e, r, t, o) {
+        var a = regeneratorAsyncGen(n, e, r, t, o);
+        return a.next().then(function(n2) {
+          return n2.done ? n2.value : a.next();
+        });
+      }
+      module.exports = _regeneratorAsync, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/regeneratorKeys.js
+  var require_regeneratorKeys = __commonJS({
+    "node_modules/@babel/runtime/helpers/regeneratorKeys.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      function _regeneratorKeys(e) {
+        var n = Object(e), r = [];
+        for (var t in n) r.unshift(t);
+        return function e2() {
+          for (; r.length; ) if ((t = r.pop()) in n) return e2.value = t, e2.done = false, e2;
+          return e2.done = true, e2;
+        };
+      }
+      module.exports = _regeneratorKeys, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/regeneratorValues.js
+  var require_regeneratorValues = __commonJS({
+    "node_modules/@babel/runtime/helpers/regeneratorValues.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var _typeof = require_typeof()["default"];
+      function _regeneratorValues(e) {
+        if (null != e) {
+          var t = e["function" == typeof Symbol && Symbol.iterator || "@@iterator"], r = 0;
+          if (t) return t.call(e);
+          if ("function" == typeof e.next) return e;
+          if (!isNaN(e.length)) return {
+            next: function next() {
+              return e && r >= e.length && (e = void 0), {
+                value: e && e[r++],
+                done: !e
+              };
+            }
+          };
+        }
+        throw new TypeError(_typeof(e) + " is not iterable");
+      }
+      module.exports = _regeneratorValues, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/helpers/regeneratorRuntime.js
+  var require_regeneratorRuntime = __commonJS({
+    "node_modules/@babel/runtime/helpers/regeneratorRuntime.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var OverloadYield = require_OverloadYield();
+      var regenerator = require_regenerator();
+      var regeneratorAsync = require_regeneratorAsync();
+      var regeneratorAsyncGen = require_regeneratorAsyncGen();
+      var regeneratorAsyncIterator = require_regeneratorAsyncIterator();
+      var regeneratorKeys = require_regeneratorKeys();
+      var regeneratorValues = require_regeneratorValues();
+      function _regeneratorRuntime() {
+        "use strict";
+        var r = regenerator(), e = r.m(_regeneratorRuntime), t = (Object.getPrototypeOf ? Object.getPrototypeOf(e) : e.__proto__).constructor;
+        function n(r2) {
+          var e2 = "function" == typeof r2 && r2.constructor;
+          return !!e2 && (e2 === t || "GeneratorFunction" === (e2.displayName || e2.name));
+        }
+        var o = {
+          "throw": 1,
+          "return": 2,
+          "break": 3,
+          "continue": 3
+        };
+        function a(r2) {
+          var e2, t2;
+          return function(n2) {
+            e2 || (e2 = {
+              stop: function stop() {
+                return t2(n2.a, 2);
+              },
+              "catch": function _catch() {
+                return n2.v;
+              },
+              abrupt: function abrupt(r3, e3) {
+                return t2(n2.a, o[r3], e3);
+              },
+              delegateYield: function delegateYield(r3, o2, a2) {
+                return e2.resultName = o2, t2(n2.d, regeneratorValues(r3), a2);
+              },
+              finish: function finish(r3) {
+                return t2(n2.f, r3);
+              }
+            }, t2 = function t3(r3, _t, o2) {
+              n2.p = e2.prev, n2.n = e2.next;
+              try {
+                return r3(_t, o2);
+              } finally {
+                e2.next = n2.n;
+              }
+            }), e2.resultName && (e2[e2.resultName] = n2.v, e2.resultName = void 0), e2.sent = n2.v, e2.next = n2.n;
+            try {
+              return r2.call(this, e2);
+            } finally {
+              n2.p = e2.prev, n2.n = e2.next;
+            }
+          };
+        }
+        return (module.exports = _regeneratorRuntime = function _regeneratorRuntime2() {
+          return {
+            wrap: function wrap(e2, t2, n2, o2) {
+              return r.w(a(e2), t2, n2, o2 && o2.reverse());
+            },
+            isGeneratorFunction: n,
+            mark: r.m,
+            awrap: function awrap(r2, e2) {
+              return new OverloadYield(r2, e2);
+            },
+            AsyncIterator: regeneratorAsyncIterator,
+            async: function async(r2, e2, t2, o2, u) {
+              return (n(e2) ? regeneratorAsyncGen : regeneratorAsync)(a(r2), e2, t2, o2, u);
+            },
+            keys: regeneratorKeys,
+            values: regeneratorValues
+          };
+        }, module.exports.__esModule = true, module.exports["default"] = module.exports)();
+      }
+      module.exports = _regeneratorRuntime, module.exports.__esModule = true, module.exports["default"] = module.exports;
+    }
+  });
+
+  // node_modules/@babel/runtime/regenerator/index.js
+  var require_regenerator2 = __commonJS({
+    "node_modules/@babel/runtime/regenerator/index.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var runtime = require_regeneratorRuntime()();
+      module.exports = runtime;
+      try {
+        regeneratorRuntime = runtime;
+      } catch (accidentalStrictMode) {
+        if (typeof globalThis === "object") {
+          globalThis.regeneratorRuntime = runtime;
+        } else {
+          Function("r", "regeneratorRuntime = r")(runtime);
+        }
+      }
+    }
+  });
+
+  // node_modules/broker-factory/build/es5/bundle.js
+  var require_bundle2 = __commonJS({
+    "node_modules/broker-factory/build/es5/bundle.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      (function(global2, factory) {
+        typeof exports8 === "object" && typeof module !== "undefined" ? factory(exports8, require_bundle(), require_defineProperty(), require_slicedToArray(), require_asyncToGenerator(), require_regenerator2()) : typeof define === "function" && define.amd ? define(["exports", "fast-unique-numbers", "@babel/runtime/helpers/defineProperty", "@babel/runtime/helpers/slicedToArray", "@babel/runtime/helpers/asyncToGenerator", "@babel/runtime/regenerator"], factory) : (global2 = typeof globalThis !== "undefined" ? globalThis : global2 || self, factory(global2.brokerFactory = {}, global2.fastUniqueNumbers, global2._defineProperty, global2._slicedToArray, global2._asyncToGenerator, global2._regeneratorRuntime));
+      })(exports8, (function(exports9, fastUniqueNumbers, _defineProperty, _slicedToArray, _asyncToGenerator, _regeneratorRuntime) {
+        "use strict";
+        function ownKeys$1(e, r) {
+          var t = Object.keys(e);
+          if (Object.getOwnPropertySymbols) {
+            var o = Object.getOwnPropertySymbols(e);
+            r && (o = o.filter(function(r2) {
+              return Object.getOwnPropertyDescriptor(e, r2).enumerable;
+            })), t.push.apply(t, o);
+          }
+          return t;
+        }
+        function _objectSpread$1(e) {
+          for (var r = 1; r < arguments.length; r++) {
+            var t = null != arguments[r] ? arguments[r] : {};
+            r % 2 ? ownKeys$1(Object(t), true).forEach(function(r2) {
+              _defineProperty(e, r2, t[r2]);
+            }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys$1(Object(t)).forEach(function(r2) {
+              Object.defineProperty(e, r2, Object.getOwnPropertyDescriptor(t, r2));
+            });
+          }
+          return e;
+        }
+        var createBrokerFactory = function createBrokerFactory2(createOrGetOngoingRequests, extendBrokerImplementation, generateUniqueNumber, isMessagePort2) {
+          return function(brokerImplementation) {
+            var fullBrokerImplementation = extendBrokerImplementation(brokerImplementation);
+            return function(sender) {
+              var ongoingRequests = createOrGetOngoingRequests(sender);
+              sender.addEventListener("message", function(_ref) {
+                var message = _ref.data;
+                var id = message.id;
+                if (id !== null && ongoingRequests.has(id)) {
+                  var _ongoingRequests$get = ongoingRequests.get(id), reject = _ongoingRequests$get.reject, resolve2 = _ongoingRequests$get.resolve;
+                  ongoingRequests["delete"](id);
+                  if (message.error === void 0) {
+                    resolve2(message.result);
+                  } else {
+                    reject(new Error(message.error.message));
+                  }
+                }
+              });
+              if (isMessagePort2(sender)) {
+                sender.start();
+              }
+              var call = function call2(method) {
+                var params = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : null;
+                var transferables = arguments.length > 2 && arguments[2] !== void 0 ? arguments[2] : [];
+                return new Promise(function(resolve2, reject) {
+                  var id = generateUniqueNumber(ongoingRequests);
+                  ongoingRequests.set(id, {
+                    reject,
+                    resolve: resolve2
+                  });
+                  if (params === null) {
+                    sender.postMessage({
+                      id,
+                      method
+                    }, transferables);
+                  } else {
+                    sender.postMessage({
+                      id,
+                      method,
+                      params
+                    }, transferables);
+                  }
+                });
+              };
+              var notify = function notify2(method, params) {
+                var transferables = arguments.length > 2 && arguments[2] !== void 0 ? arguments[2] : [];
+                sender.postMessage({
+                  id: null,
+                  method,
+                  params
+                }, transferables);
+              };
+              var functions = {};
+              for (var _i = 0, _Object$entries = Object.entries(fullBrokerImplementation); _i < _Object$entries.length; _i++) {
+                var _Object$entries$_i = _slicedToArray(_Object$entries[_i], 2), key = _Object$entries$_i[0], handler = _Object$entries$_i[1];
+                functions = _objectSpread$1(_objectSpread$1({}, functions), {}, _defineProperty({}, key, handler({
+                  call,
+                  notify
+                })));
+              }
+              return _objectSpread$1({}, functions);
+            };
+          };
+        };
+        var createCreateOrGetOngoingRequests = function createCreateOrGetOngoingRequests2(ongoingRequestsMap) {
+          return function(sender) {
+            if (ongoingRequestsMap.has(sender)) {
+              return ongoingRequestsMap.get(sender);
+            }
+            var ongoingRequests = /* @__PURE__ */ new Map();
+            ongoingRequestsMap.set(sender, ongoingRequests);
+            return ongoingRequests;
+          };
+        };
+        function ownKeys(e, r) {
+          var t = Object.keys(e);
+          if (Object.getOwnPropertySymbols) {
+            var o = Object.getOwnPropertySymbols(e);
+            r && (o = o.filter(function(r2) {
+              return Object.getOwnPropertyDescriptor(e, r2).enumerable;
+            })), t.push.apply(t, o);
+          }
+          return t;
+        }
+        function _objectSpread(e) {
+          for (var r = 1; r < arguments.length; r++) {
+            var t = null != arguments[r] ? arguments[r] : {};
+            r % 2 ? ownKeys(Object(t), true).forEach(function(r2) {
+              _defineProperty(e, r2, t[r2]);
+            }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function(r2) {
+              Object.defineProperty(e, r2, Object.getOwnPropertyDescriptor(t, r2));
+            });
+          }
+          return e;
+        }
+        var createExtendBrokerImplementation = function createExtendBrokerImplementation2(portMap) {
+          return function(partialBrokerImplementation) {
+            return _objectSpread(_objectSpread({}, partialBrokerImplementation), {}, {
+              connect: function connect(_ref) {
+                var call = _ref.call;
+                return /* @__PURE__ */ _asyncToGenerator(/* @__PURE__ */ _regeneratorRuntime.mark(function _callee() {
+                  var _MessageChannel, port1, port2, portId;
+                  return _regeneratorRuntime.wrap(function(_context) {
+                    while (1) switch (_context.prev = _context.next) {
+                      case 0:
+                        _MessageChannel = new MessageChannel(), port1 = _MessageChannel.port1, port2 = _MessageChannel.port2;
+                        _context.next = 1;
+                        return call("connect", {
+                          port: port1
+                        }, [port1]);
+                      case 1:
+                        portId = _context.sent;
+                        portMap.set(port2, portId);
+                        return _context.abrupt("return", port2);
+                      case 2:
+                      case "end":
+                        return _context.stop();
+                    }
+                  }, _callee);
+                }));
+              },
+              disconnect: function disconnect(_ref3) {
+                var call = _ref3.call;
+                return /* @__PURE__ */ (function() {
+                  var _ref4 = _asyncToGenerator(/* @__PURE__ */ _regeneratorRuntime.mark(function _callee2(port) {
+                    var portId;
+                    return _regeneratorRuntime.wrap(function(_context2) {
+                      while (1) switch (_context2.prev = _context2.next) {
+                        case 0:
+                          portId = portMap.get(port);
+                          if (!(portId === void 0)) {
+                            _context2.next = 1;
+                            break;
+                          }
+                          throw new Error("The given port is not connected.");
+                        case 1:
+                          _context2.next = 2;
+                          return call("disconnect", {
+                            portId
+                          });
+                        case 2:
+                        case "end":
+                          return _context2.stop();
+                      }
+                    }, _callee2);
+                  }));
+                  return function(_x) {
+                    return _ref4.apply(this, arguments);
+                  };
+                })();
+              },
+              isSupported: function isSupported(_ref5) {
+                var call = _ref5.call;
+                return function() {
+                  return call("isSupported");
+                };
+              }
+            });
+          };
+        };
+        var isMessagePort = function isMessagePort2(sender) {
+          return typeof sender.start === "function";
+        };
+        var createBroker = createBrokerFactory(createCreateOrGetOngoingRequests(/* @__PURE__ */ new WeakMap()), createExtendBrokerImplementation(/* @__PURE__ */ new WeakMap()), fastUniqueNumbers.generateUniqueNumber, isMessagePort);
+        exports9.createBroker = createBroker;
+      }));
+    }
+  });
+
+  // node_modules/worker-timers-broker/build/es5/bundle.js
+  var require_bundle3 = __commonJS({
+    "node_modules/worker-timers-broker/build/es5/bundle.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      (function(global2, factory) {
+        typeof exports8 === "object" && typeof module !== "undefined" ? factory(exports8, require_bundle2(), require_bundle(), require_typeof()) : typeof define === "function" && define.amd ? define(["exports", "broker-factory", "fast-unique-numbers", "@babel/runtime/helpers/typeof"], factory) : (global2 = typeof globalThis !== "undefined" ? globalThis : global2 || self, factory(global2.workerTimersBroker = {}, global2.brokerFactory, global2.fastUniqueNumbers, global2._typeof));
+      })(exports8, (function(exports9, brokerFactory, fastUniqueNumbers, _typeof) {
+        "use strict";
+        var createClearIntervalFactory = function createClearIntervalFactory2(scheduledIntervalsState2) {
+          return function(clear) {
+            return function(timerId) {
+              if (_typeof(scheduledIntervalsState2.get(timerId)) === "symbol") {
+                scheduledIntervalsState2.set(timerId, null);
+                clear(timerId).then(function() {
+                  scheduledIntervalsState2["delete"](timerId);
+                });
+              }
+            };
+          };
+        };
+        var createClearTimeoutFactory = function createClearTimeoutFactory2(scheduledTimeoutsState2) {
+          return function(clear) {
+            return function(timerId) {
+              if (_typeof(scheduledTimeoutsState2.get(timerId)) === "symbol") {
+                scheduledTimeoutsState2.set(timerId, null);
+                clear(timerId).then(function() {
+                  scheduledTimeoutsState2["delete"](timerId);
+                });
+              }
+            };
+          };
+        };
+        var createSetIntervalFactory = function createSetIntervalFactory2(generateUniqueNumber, scheduledIntervalsState2) {
+          return function(set) {
+            return function(func) {
+              var delay = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : 0;
+              for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
+                args[_key - 2] = arguments[_key];
+              }
+              var symbol = Symbol();
+              var timerId = generateUniqueNumber(scheduledIntervalsState2);
+              scheduledIntervalsState2.set(timerId, symbol);
+              var _schedule = function schedule() {
+                return set(delay, timerId).then(function() {
+                  var state = scheduledIntervalsState2.get(timerId);
+                  if (state === void 0) {
+                    throw new Error("The timer is in an undefined state.");
+                  }
+                  if (state === symbol) {
+                    func.apply(void 0, args);
+                    if (scheduledIntervalsState2.get(timerId) === symbol) {
+                      _schedule();
+                    }
+                  }
+                });
+              };
+              _schedule();
+              return timerId;
+            };
+          };
+        };
+        var createSetTimeoutFactory = function createSetTimeoutFactory2(generateUniqueNumber, scheduledTimeoutsState2) {
+          return function(set) {
+            return function(func) {
+              var delay = arguments.length > 1 && arguments[1] !== void 0 ? arguments[1] : 0;
+              for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
+                args[_key - 2] = arguments[_key];
+              }
+              var symbol = Symbol();
+              var timerId = generateUniqueNumber(scheduledTimeoutsState2);
+              scheduledTimeoutsState2.set(timerId, symbol);
+              set(delay, timerId).then(function() {
+                var state = scheduledTimeoutsState2.get(timerId);
+                if (state === void 0) {
+                  throw new Error("The timer is in an undefined state.");
+                }
+                if (state === symbol) {
+                  scheduledTimeoutsState2["delete"](timerId);
+                  func.apply(void 0, args);
+                }
+              });
+              return timerId;
+            };
+          };
+        };
+        var scheduledIntervalsState = /* @__PURE__ */ new Map([[0, null]]);
+        var scheduledTimeoutsState = /* @__PURE__ */ new Map([[0, null]]);
+        var createClearInterval = createClearIntervalFactory(scheduledIntervalsState);
+        var createClearTimeout = createClearTimeoutFactory(scheduledTimeoutsState);
+        var createSetInterval = createSetIntervalFactory(fastUniqueNumbers.generateUniqueNumber, scheduledIntervalsState);
+        var createSetTimeout = createSetTimeoutFactory(fastUniqueNumbers.generateUniqueNumber, scheduledTimeoutsState);
+        var wrap = brokerFactory.createBroker({
+          clearInterval: function clearInterval2(_ref) {
+            var call = _ref.call;
+            return createClearInterval(function(timerId) {
+              return call("clear", {
+                timerId,
+                timerType: "interval"
+              });
+            });
+          },
+          clearTimeout: function clearTimeout2(_ref2) {
+            var call = _ref2.call;
+            return createClearTimeout(function(timerId) {
+              return call("clear", {
+                timerId,
+                timerType: "timeout"
+              });
+            });
+          },
+          setInterval: function setInterval2(_ref3) {
+            var call = _ref3.call;
+            return createSetInterval(function(delay, timerId) {
+              return call("set", {
+                delay,
+                now: performance.timeOrigin + performance.now(),
+                timerId,
+                timerType: "interval"
+              });
+            });
+          },
+          setTimeout: function setTimeout2(_ref4) {
+            var call = _ref4.call;
+            return createSetTimeout(function(delay, timerId) {
+              return call("set", {
+                delay,
+                now: performance.timeOrigin + performance.now(),
+                timerId,
+                timerType: "timeout"
+              });
+            });
+          }
+        });
+        var load = function load2(url) {
+          var worker = new Worker(url);
+          return wrap(worker);
+        };
+        exports9.load = load;
+        exports9.wrap = wrap;
+      }));
+    }
+  });
+
+  // node_modules/worker-timers/build/es5/bundle.js
+  var require_bundle4 = __commonJS({
+    "node_modules/worker-timers/build/es5/bundle.js"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      (function(global2, factory) {
+        typeof exports8 === "object" && typeof module !== "undefined" ? factory(exports8, require_bundle3()) : typeof define === "function" && define.amd ? define(["exports", "worker-timers-broker"], factory) : (global2 = typeof globalThis !== "undefined" ? globalThis : global2 || self, factory(global2.workerTimers = {}, global2.workerTimersBroker));
+      })(exports8, (function(exports9, workerTimersBroker) {
+        "use strict";
+        var createLoadOrReturnBroker = function createLoadOrReturnBroker2(loadBroker, worker2) {
+          var broker = null;
+          return function() {
+            if (broker !== null) {
+              return broker;
+            }
+            var blob = new Blob([worker2], {
+              type: "application/javascript; charset=utf-8"
+            });
+            var url = URL.createObjectURL(blob);
+            broker = loadBroker(url);
+            setTimeout(function() {
+              return URL.revokeObjectURL(url);
+            });
+            return broker;
+          };
+        };
+        var worker = `(()=>{var e={389(e,t){!function(e){"use strict";var t=function(e){return function(t){var r=e(t);return t.add(r),r}},r=function(e){return function(t,r){return e.set(t,r),r}},n=void 0===Number.MAX_SAFE_INTEGER?9007199254740991:Number.MAX_SAFE_INTEGER,o=536870912,u=2*o,a=function(e,t){return function(r){var a=t.get(r),i=void 0===a?r.size:a<u?a+1:0;if(!r.has(i))return e(r,i);if(r.size<o){for(;r.has(i);)i=Math.floor(Math.random()*u);return e(r,i)}if(r.size>n)throw new Error("Congratulations, you created a collection of unique numbers which uses all available integers!");for(;r.has(i);)i=Math.floor(Math.random()*n);return e(r,i)}},i=new WeakMap,s=r(i),c=a(s,i),f=t(c);e.addUniqueNumber=f,e.generateUniqueNumber=c}(t)},623(e,t,r){!function(e,t,r,n,o){"use strict";var u={INTERNAL_ERROR:-32603,INVALID_PARAMS:-32602,METHOD_NOT_FOUND:-32601},a=function(e,t){return Object.assign(new Error(e),{status:t})},i=function(e){return a('The requested method called "'.concat(e,'" is not 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+        var loadOrReturnBroker = createLoadOrReturnBroker(workerTimersBroker.load, worker);
+        var clearInterval2 = function clearInterval3(timerId) {
+          return loadOrReturnBroker().clearInterval(timerId);
+        };
+        var clearTimeout2 = function clearTimeout3(timerId) {
+          return loadOrReturnBroker().clearTimeout(timerId);
+        };
+        var setInterval2 = function setInterval3() {
+          var _loadOrReturnBroker;
+          return (_loadOrReturnBroker = loadOrReturnBroker()).setInterval.apply(_loadOrReturnBroker, arguments);
+        };
+        var setTimeout$1 = function setTimeout2() {
+          var _loadOrReturnBroker2;
+          return (_loadOrReturnBroker2 = loadOrReturnBroker()).setTimeout.apply(_loadOrReturnBroker2, arguments);
+        };
+        exports9.clearInterval = clearInterval2;
+        exports9.clearTimeout = clearTimeout2;
+        exports9.setInterval = setInterval2;
+        exports9.setTimeout = setTimeout$1;
+      }));
+    }
+  });
+
+  // build/lib/is-browser.js
+  var require_is_browser = __commonJS({
+    "build/lib/is-browser.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      exports8.isReactNativeBrowser = exports8.isWebWorker = void 0;
+      var isStandardBrowserEnv = () => {
+        if (typeof window !== "undefined") {
+          const electronRenderCheck = typeof navigator !== "undefined" && navigator.userAgent?.toLowerCase().indexOf(" electron/") > -1;
+          if (electronRenderCheck && process_exports?.versions) {
+            const electronMainCheck = Object.prototype.hasOwnProperty.call(process_exports.versions, "electron");
+            return !electronMainCheck;
+          }
+          return typeof window.document !== "undefined";
+        }
+        return false;
+      };
+      var isWebWorkerEnv = () => Boolean(typeof self === "object" && self?.constructor?.name?.includes("WorkerGlobalScope") && typeof Deno === "undefined");
+      var isReactNativeEnv = () => typeof navigator !== "undefined" && navigator.product === "ReactNative";
+      var isBrowser = isStandardBrowserEnv() || isWebWorkerEnv() || isReactNativeEnv();
+      exports8.isWebWorker = isWebWorkerEnv();
+      exports8.isReactNativeBrowser = isReactNativeEnv();
+      exports8.default = isBrowser;
+    }
+  });
+
+  // build/lib/get-timer.js
+  var require_get_timer = __commonJS({
+    "build/lib/get-timer.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __createBinding = exports8 && exports8.__createBinding || (Object.create ? (function(o, m, k, k2) {
+        if (k2 === void 0) k2 = k;
+        var desc = Object.getOwnPropertyDescriptor(m, k);
+        if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+          desc = { enumerable: true, get: function() {
+            return m[k];
+          } };
+        }
+        Object.defineProperty(o, k2, desc);
+      }) : (function(o, m, k, k2) {
+        if (k2 === void 0) k2 = k;
+        o[k2] = m[k];
+      }));
+      var __setModuleDefault = exports8 && exports8.__setModuleDefault || (Object.create ? (function(o, v) {
+        Object.defineProperty(o, "default", { enumerable: true, value: v });
+      }) : function(o, v) {
+        o["default"] = v;
+      });
+      var __importStar = exports8 && exports8.__importStar || /* @__PURE__ */ (function() {
+        var ownKeys = function(o) {
+          ownKeys = Object.getOwnPropertyNames || function(o2) {
+            var ar = [];
+            for (var k in o2) if (Object.prototype.hasOwnProperty.call(o2, k)) ar[ar.length] = k;
+            return ar;
+          };
+          return ownKeys(o);
+        };
+        return function(mod) {
+          if (mod && mod.__esModule) return mod;
+          var result = {};
+          if (mod != null) {
+            for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
+          }
+          __setModuleDefault(result, mod);
+          return result;
+        };
+      })();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var worker_timers_1 = require_bundle4();
+      var is_browser_1 = __importStar(require_is_browser());
+      var workerTimer = {
+        set: worker_timers_1.setInterval,
+        clear: worker_timers_1.clearInterval
+      };
+      var nativeTimer = {
+        set: (func, time) => setInterval(func, time),
+        clear: (timerId) => clearInterval(timerId)
+      };
+      var getTimer = (variant) => {
+        switch (variant) {
+          case "native": {
+            return nativeTimer;
+          }
+          case "worker": {
+            return workerTimer;
+          }
+          case "auto":
+          default: {
+            return is_browser_1.default && !is_browser_1.isWebWorker && !is_browser_1.isReactNativeBrowser ? workerTimer : nativeTimer;
+          }
+        }
+      };
+      exports8.default = getTimer;
+    }
+  });
+
+  // build/lib/KeepaliveManager.js
+  var require_KeepaliveManager = __commonJS({
+    "build/lib/KeepaliveManager.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __importDefault = exports8 && exports8.__importDefault || function(mod) {
+        return mod && mod.__esModule ? mod : { "default": mod };
+      };
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var get_timer_1 = __importDefault(require_get_timer());
+      var KeepaliveManager = class {
+        _keepalive;
+        timerId;
+        timer;
+        destroyed = false;
+        counter;
+        client;
+        _keepaliveTimeoutTimestamp;
+        _intervalEvery;
+        get keepaliveTimeoutTimestamp() {
+          return this._keepaliveTimeoutTimestamp;
+        }
+        get intervalEvery() {
+          return this._intervalEvery;
+        }
+        get keepalive() {
+          return this._keepalive;
+        }
+        constructor(client, variant) {
+          this.client = client;
+          this.timer = typeof variant === "object" && "set" in variant && "clear" in variant ? variant : (0, get_timer_1.default)(variant);
+          this.setKeepalive(client.options.keepalive);
+        }
+        clear() {
+          if (this.timerId) {
+            this.timer.clear(this.timerId);
+            this.timerId = null;
+          }
+        }
+        setKeepalive(value) {
+          value *= 1e3;
+          if (isNaN(value) || value <= 0 || value > 2147483647) {
+            throw new Error(`Keepalive value must be an integer between 0 and 2147483647. Provided value is ${value}`);
+          }
+          this._keepalive = value;
+          this.reschedule();
+          this.client["log"](`KeepaliveManager: set keepalive to ${value}ms`);
+        }
+        destroy() {
+          this.clear();
+          this.destroyed = true;
+        }
+        reschedule() {
+          if (this.destroyed) {
+            return;
+          }
+          this.clear();
+          this.counter = 0;
+          const keepAliveTimeout = Math.ceil(this._keepalive * 1.5);
+          this._keepaliveTimeoutTimestamp = Date.now() + keepAliveTimeout;
+          this._intervalEvery = Math.ceil(this._keepalive / 2);
+          this.timerId = this.timer.set(() => {
+            if (this.destroyed) {
+              return;
+            }
+            this.counter += 1;
+            if (this.counter === 2) {
+              this.client.sendPing();
+            } else if (this.counter > 2) {
+              this.client.onKeepaliveTimeout();
+            }
+          }, this._intervalEvery);
+        }
+      };
+      exports8.default = KeepaliveManager;
+    }
+  });
+
+  // build/lib/client.js
+  var require_client = __commonJS({
+    "build/lib/client.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __createBinding = exports8 && exports8.__createBinding || (Object.create ? (function(o, m, k, k2) {
+        if (k2 === void 0) k2 = k;
+        var desc = Object.getOwnPropertyDescriptor(m, k);
+        if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+          desc = { enumerable: true, get: function() {
+            return m[k];
+          } };
+        }
+        Object.defineProperty(o, k2, desc);
+      }) : (function(o, m, k, k2) {
+        if (k2 === void 0) k2 = k;
+        o[k2] = m[k];
+      }));
+      var __setModuleDefault = exports8 && exports8.__setModuleDefault || (Object.create ? (function(o, v) {
+        Object.defineProperty(o, "default", { enumerable: true, value: v });
+      }) : function(o, v) {
+        o["default"] = v;
+      });
+      var __importStar = exports8 && exports8.__importStar || /* @__PURE__ */ (function() {
+        var ownKeys = function(o) {
+          ownKeys = Object.getOwnPropertyNames || function(o2) {
+            var ar = [];
+            for (var k in o2) if (Object.prototype.hasOwnProperty.call(o2, k)) ar[ar.length] = k;
+            return ar;
+          };
+          return ownKeys(o);
+        };
+        return function(mod) {
+          if (mod && mod.__esModule) return mod;
+          var result = {};
+          if (mod != null) {
+            for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
+          }
+          __setModuleDefault(result, mod);
+          return result;
+        };
+      })();
+      var __importDefault = exports8 && exports8.__importDefault || function(mod) {
+        return mod && mod.__esModule ? mod : { "default": mod };
+      };
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var mqtt_packet_1 = __importDefault(require_mqtt());
+      var readable_stream_1 = require_browser3();
+      var default_1 = __importDefault(require_default());
+      var debug_1 = __importDefault(require_browser4());
+      var validations = __importStar(require_validations());
+      var store_1 = __importDefault(require_store());
+      var handlers_1 = __importDefault(require_handlers());
+      var default_message_id_provider_1 = __importDefault(require_default_message_id_provider());
+      var topic_alias_recv_1 = __importDefault(require_topic_alias_recv());
+      var shared_1 = require_shared();
+      var TypedEmitter_1 = require_TypedEmitter();
+      var KeepaliveManager_1 = __importDefault(require_KeepaliveManager());
+      var is_browser_1 = __importStar(require_is_browser());
+      var setImmediate2 = globalThis.setImmediate || ((...args) => {
+        const callback = args.shift();
+        (0, shared_1.nextTick)(() => {
+          callback(...args);
+        });
+      });
+      var defaultConnectOptions = {
+        keepalive: 60,
+        reschedulePings: true,
+        protocolId: "MQTT",
+        protocolVersion: 4,
+        reconnectPeriod: 1e3,
+        connectTimeout: 30 * 1e3,
+        clean: true,
+        resubscribe: true,
+        subscribeBatchSize: null,
+        writeCache: true,
+        timerVariant: "auto"
+      };
+      var MqttClient = class _MqttClient extends TypedEmitter_1.TypedEventEmitter {
+        static VERSION = shared_1.MQTTJS_VERSION;
+        connected;
+        disconnecting;
+        disconnected;
+        reconnecting;
+        incomingStore;
+        outgoingStore;
+        options;
+        queueQoSZero;
+        _reconnectCount;
+        log;
+        messageIdProvider;
+        outgoing;
+        messageIdToTopic;
+        noop;
+        keepaliveManager;
+        stream;
+        queue;
+        streamBuilder;
+        _resubscribeTopics;
+        connackTimer;
+        reconnectTimer;
+        _storeProcessing;
+        _packetIdsDuringStoreProcessing;
+        _storeProcessingQueue;
+        _firstConnection;
+        topicAliasRecv;
+        topicAliasSend;
+        _deferredReconnect;
+        connackPacket;
+        static defaultId() {
+          return `mqttjs_${Math.random().toString(16).substr(2, 8)}`;
+        }
+        constructor(streamBuilder, options) {
+          super();
+          this.options = options || {};
+          for (const k in defaultConnectOptions) {
+            if (typeof this.options[k] === "undefined") {
+              this.options[k] = defaultConnectOptions[k];
+            } else {
+              this.options[k] = options[k];
+            }
+          }
+          this.log = this.options.log || (0, debug_1.default)("mqttjs:client");
+          this.noop = this._noop.bind(this);
+          this.log("MqttClient :: version:", _MqttClient.VERSION);
+          if (is_browser_1.isWebWorker) {
+            this.log("MqttClient :: environment", "webworker");
+          } else {
+            this.log("MqttClient :: environment", is_browser_1.default ? "browser" : "node");
+          }
+          this.log("MqttClient :: options.protocol", options.protocol);
+          this.log("MqttClient :: options.protocolVersion", options.protocolVersion);
+          this.log("MqttClient :: options.username", options.username);
+          this.log("MqttClient :: options.keepalive", options.keepalive);
+          this.log("MqttClient :: options.reconnectPeriod", options.reconnectPeriod);
+          this.log("MqttClient :: options.rejectUnauthorized", options.rejectUnauthorized);
+          this.log("MqttClient :: options.properties.topicAliasMaximum", options.properties ? options.properties.topicAliasMaximum : void 0);
+          this.options.clientId = typeof options.clientId === "string" ? options.clientId : _MqttClient.defaultId();
+          this.log("MqttClient :: clientId", this.options.clientId);
+          this.options.customHandleAcks = options.protocolVersion === 5 && options.customHandleAcks ? options.customHandleAcks : (...args) => {
+            args[3](null, 0);
+          };
+          if (!this.options.writeCache) {
+            mqtt_packet_1.default.writeToStream.cacheNumbers = false;
+          }
+          this.streamBuilder = streamBuilder;
+          this.messageIdProvider = typeof this.options.messageIdProvider === "undefined" ? new default_message_id_provider_1.default() : this.options.messageIdProvider;
+          this.outgoingStore = options.outgoingStore || new store_1.default();
+          this.incomingStore = options.incomingStore || new store_1.default();
+          this.queueQoSZero = options.queueQoSZero === void 0 ? true : options.queueQoSZero;
+          this._resubscribeTopics = {};
+          this.messageIdToTopic = {};
+          this.keepaliveManager = null;
+          this.connected = false;
+          this.disconnecting = false;
+          this.reconnecting = false;
+          this.queue = [];
+          this.connackTimer = null;
+          this.reconnectTimer = null;
+          this._storeProcessing = false;
+          this._packetIdsDuringStoreProcessing = {};
+          this._storeProcessingQueue = [];
+          this.outgoing = {};
+          this._firstConnection = true;
+          if (options.properties && options.properties.topicAliasMaximum > 0) {
+            if (options.properties.topicAliasMaximum > 65535) {
+              this.log("MqttClient :: options.properties.topicAliasMaximum is out of range");
+            } else {
+              this.topicAliasRecv = new topic_alias_recv_1.default(options.properties.topicAliasMaximum);
+            }
+          }
+          this.on("connect", () => {
+            const { queue: queue3 } = this;
+            const deliver = () => {
+              const entry = queue3.shift();
+              this.log("deliver :: entry %o", entry);
+              let packet = null;
+              if (!entry) {
+                this._resubscribe();
+                return;
+              }
+              packet = entry.packet;
+              this.log("deliver :: call _sendPacket for %o", packet);
+              let send = true;
+              if (packet.messageId && packet.messageId !== 0) {
+                if (!this.messageIdProvider.register(packet.messageId)) {
+                  send = false;
+                }
+              }
+              if (send) {
+                this._sendPacket(packet, (err) => {
+                  if (entry.cb) {
+                    entry.cb(err);
+                  }
+                  deliver();
+                });
+              } else {
+                this.log("messageId: %d has already used. The message is skipped and removed.", packet.messageId);
+                deliver();
+              }
+            };
+            this.log("connect :: sending queued packets");
+            deliver();
+          });
+          this.on("close", () => {
+            this.log("close :: connected set to `false`");
+            this.connected = false;
+            this.log("close :: clearing connackTimer");
+            clearTimeout(this.connackTimer);
+            this._destroyKeepaliveManager();
+            if (this.topicAliasRecv) {
+              this.topicAliasRecv.clear();
+            }
+            this.log("close :: calling _setupReconnect");
+            this._setupReconnect();
+          });
+          if (!this.options.manualConnect) {
+            this.log("MqttClient :: setting up stream");
+            this.connect();
+          }
+        }
+        handleAuth(packet, callback) {
+          callback();
+        }
+        handleMessage(packet, callback) {
+          callback();
+        }
+        _nextId() {
+          return this.messageIdProvider.allocate();
+        }
+        getLastMessageId() {
+          return this.messageIdProvider.getLastAllocated();
+        }
+        connect() {
+          const writable = new readable_stream_1.Writable();
+          const parser = mqtt_packet_1.default.parser(this.options);
+          let completeParse = null;
+          const packets = [];
+          this.log("connect :: calling method to clear reconnect");
+          this._clearReconnect();
+          if (this.disconnected && !this.reconnecting) {
+            this.incomingStore = this.options.incomingStore || new store_1.default();
+            this.outgoingStore = this.options.outgoingStore || new store_1.default();
+            this.disconnecting = false;
+            this.disconnected = false;
+          }
+          this.log("connect :: using streamBuilder provided to client to create stream");
+          this.stream = this.streamBuilder(this);
+          parser.on("packet", (packet) => {
+            this.log("parser :: on packet push to packets array.");
+            packets.push(packet);
+          });
+          const work = () => {
+            this.log("work :: getting next packet in queue");
+            const packet = packets.shift();
+            if (packet) {
+              this.log("work :: packet pulled from queue");
+              (0, handlers_1.default)(this, packet, nextTickWork);
+            } else {
+              this.log("work :: no packets in queue");
+              const done = completeParse;
+              completeParse = null;
+              this.log("work :: done flag is %s", !!done);
+              if (done)
+                done();
+            }
+          };
+          const nextTickWork = () => {
+            if (packets.length) {
+              (0, shared_1.nextTick)(work);
+            } else {
+              const done = completeParse;
+              completeParse = null;
+              done();
+            }
+          };
+          writable._write = (buf, enc, done) => {
+            completeParse = done;
+            this.log("writable stream :: parsing buffer");
+            parser.parse(buf);
+            work();
+          };
+          const streamErrorHandler = (error) => {
+            this.log("streamErrorHandler :: error", error.message);
+            if (error.code) {
+              this.log("streamErrorHandler :: emitting error");
+              this.emit("error", error);
+            } else {
+              this.noop(error);
+            }
+          };
+          this.log("connect :: pipe stream to writable stream");
+          this.stream.pipe(writable);
+          this.stream.on("error", streamErrorHandler);
+          this.stream.on("close", () => {
+            this.log("(%s)stream :: on close", this.options.clientId);
+            this._flushVolatile();
+            this.log("stream: emit close to MqttClient");
+            this.emit("close");
+          });
+          this.log("connect: sending packet `connect`");
+          const connectPacket = {
+            cmd: "connect",
+            protocolId: this.options.protocolId,
+            protocolVersion: this.options.protocolVersion,
+            clean: this.options.clean,
+            clientId: this.options.clientId,
+            keepalive: this.options.keepalive,
+            username: this.options.username,
+            password: this.options.password,
+            properties: this.options.properties
+          };
+          if (this.options.will) {
+            connectPacket.will = {
+              ...this.options.will,
+              payload: this.options.will?.payload
+            };
+          }
+          if (this.topicAliasRecv) {
+            if (!connectPacket.properties) {
+              connectPacket.properties = {};
+            }
+            if (this.topicAliasRecv) {
+              connectPacket.properties.topicAliasMaximum = this.topicAliasRecv.max;
+            }
+          }
+          this._writePacket(connectPacket);
+          parser.on("error", this.emit.bind(this, "error"));
+          if (this.options.properties) {
+            if (!this.options.properties.authenticationMethod && this.options.properties.authenticationData) {
+              this.end(() => this.emit("error", new Error("Packet has no Authentication Method")));
+              return this;
+            }
+            if (this.options.properties.authenticationMethod && this.options.authPacket && typeof this.options.authPacket === "object") {
+              const authPacket = {
+                cmd: "auth",
+                reasonCode: 0,
+                ...this.options.authPacket
+              };
+              this._writePacket(authPacket);
+            }
+          }
+          this.stream.setMaxListeners(1e3);
+          clearTimeout(this.connackTimer);
+          this.connackTimer = setTimeout(() => {
+            this.log("!!connectTimeout hit!! Calling _cleanUp with force `true`");
+            this.emit("error", new Error("connack timeout"));
+            this._cleanUp(true);
+          }, this.options.connectTimeout);
+          return this;
+        }
+        publish(topic, message, opts, callback) {
+          this.log("publish :: message `%s` to topic `%s`", message, topic);
+          const { options } = this;
+          if (typeof opts === "function") {
+            callback = opts;
+            opts = null;
+          }
+          opts = opts || {};
+          const defaultOpts = {
+            qos: 0,
+            retain: false,
+            dup: false
+          };
+          opts = { ...defaultOpts, ...opts };
+          const { qos, retain, dup, properties, cbStorePut } = opts;
+          if (this._checkDisconnecting(callback)) {
+            return this;
+          }
+          const publishProc = () => {
+            let messageId = 0;
+            if (qos === 1 || qos === 2) {
+              messageId = this._nextId();
+              if (messageId === null) {
+                this.log("No messageId left");
+                return false;
+              }
+            }
+            const packet = {
+              cmd: "publish",
+              topic,
+              payload: message,
+              qos,
+              retain,
+              messageId,
+              dup
+            };
+            if (options.protocolVersion === 5) {
+              packet.properties = properties;
+            }
+            this.log("publish :: qos", qos);
+            switch (qos) {
+              case 1:
+              case 2:
+                this.outgoing[packet.messageId] = {
+                  volatile: false,
+                  cb: callback || this.noop
+                };
+                this.log("MqttClient:publish: packet cmd: %s", packet.cmd);
+                this._sendPacket(packet, void 0, cbStorePut);
+                break;
+              default:
+                this.log("MqttClient:publish: packet cmd: %s", packet.cmd);
+                this._sendPacket(packet, callback, cbStorePut);
+                break;
+            }
+            return true;
+          };
+          if (this._storeProcessing || this._storeProcessingQueue.length > 0 || !publishProc()) {
+            this._storeProcessingQueue.push({
+              invoke: publishProc,
+              cbStorePut: opts.cbStorePut,
+              callback
+            });
+          }
+          return this;
+        }
+        publishAsync(topic, message, opts) {
+          return new Promise((resolve2, reject) => {
+            this.publish(topic, message, opts, (err, packet) => {
+              if (err) {
+                reject(err);
+              } else {
+                resolve2(packet);
+              }
+            });
+          });
+        }
+        subscribe(topicObject, opts, callback) {
+          const version4 = this.options.protocolVersion;
+          if (typeof opts === "function") {
+            callback = opts;
+          }
+          callback = callback || this.noop;
+          let resubscribe = false;
+          let topicsList = [];
+          if (typeof topicObject === "string") {
+            topicObject = [topicObject];
+            topicsList = topicObject;
+          } else if (Array.isArray(topicObject)) {
+            topicsList = topicObject;
+          } else if (typeof topicObject === "object") {
+            resubscribe = topicObject.resubscribe;
+            delete topicObject.resubscribe;
+            topicsList = Object.keys(topicObject);
+          }
+          const invalidTopic = validations.validateTopics(topicsList);
+          if (invalidTopic !== null) {
+            setImmediate2(callback, new Error(`Invalid topic ${invalidTopic}`));
+            return this;
+          }
+          if (this._checkDisconnecting(callback)) {
+            this.log("subscribe: discconecting true");
+            return this;
+          }
+          const defaultOpts = {
+            qos: 0
+          };
+          if (version4 === 5) {
+            defaultOpts.nl = false;
+            defaultOpts.rap = false;
+            defaultOpts.rh = 0;
+          }
+          opts = { ...defaultOpts, ...opts };
+          const { properties } = opts;
+          const subs = [];
+          const parseSub = (topic, subOptions) => {
+            subOptions = subOptions || opts;
+            if (!Object.prototype.hasOwnProperty.call(this._resubscribeTopics, topic) || this._resubscribeTopics[topic].qos < subOptions.qos || resubscribe) {
+              const currentOpts = {
+                topic,
+                qos: subOptions.qos
+              };
+              if (version4 === 5) {
+                currentOpts.nl = subOptions.nl;
+                currentOpts.rap = subOptions.rap;
+                currentOpts.rh = subOptions.rh;
+                currentOpts.properties = properties;
+              }
+              this.log("subscribe: pushing topic `%s` and qos `%s` to subs list", currentOpts.topic, currentOpts.qos);
+              subs.push(currentOpts);
+            }
+          };
+          if (Array.isArray(topicObject)) {
+            topicObject.forEach((topic) => {
+              this.log("subscribe: array topic %s", topic);
+              parseSub(topic);
+            });
+          } else {
+            Object.keys(topicObject).forEach((topic) => {
+              this.log("subscribe: object topic %s, %o", topic, topicObject[topic]);
+              parseSub(topic, topicObject[topic]);
+            });
+          }
+          if (!subs.length) {
+            callback(null, []);
+            return this;
+          }
+          const subscribeChunkedSubs = (chunkedSubs, messageId) => {
+            const packet = {
+              cmd: "subscribe",
+              subscriptions: chunkedSubs,
+              messageId
+            };
+            if (properties) {
+              packet.properties = properties;
+            }
+            if (this.options.resubscribe) {
+              this.log("subscribe :: resubscribe true");
+              const topics = [];
+              chunkedSubs.forEach((sub) => {
+                if (this.options.reconnectPeriod > 0) {
+                  const topic = { qos: sub.qos };
+                  if (version4 === 5) {
+                    topic.nl = sub.nl || false;
+                    topic.rap = sub.rap || false;
+                    topic.rh = sub.rh || 0;
+                    topic.properties = sub.properties;
+                  }
+                  this._resubscribeTopics[sub.topic] = topic;
+                  topics.push(sub.topic);
+                }
+              });
+              this.messageIdToTopic[packet.messageId] = topics;
+            }
+            const promise = new Promise((resolve2, reject) => {
+              this.outgoing[packet.messageId] = {
+                volatile: true,
+                cb(err, packet2) {
+                  if (!err) {
+                    const { granted } = packet2;
+                    for (let grantedI = 0; grantedI < granted.length; grantedI += 1) {
+                      chunkedSubs[grantedI].qos = granted[grantedI];
+                    }
+                  }
+                  if (!err) {
+                    resolve2(packet2);
+                  } else {
+                    reject(new shared_1.ErrorWithSubackPacket(err.message, packet2));
+                  }
+                }
+              };
+            });
+            this.log("subscribe :: call _sendPacket");
+            this._sendPacket(packet);
+            return promise;
+          };
+          const subscribeProc = () => {
+            const batchSize = this.options.subscribeBatchSize ?? subs.length;
+            const subscribePromises = [];
+            for (let i = 0; i < subs.length; i += batchSize) {
+              const chunkedSubs = subs.slice(i, i + batchSize);
+              const messageId = this._nextId();
+              if (messageId === null) {
+                this.log("No messageId left");
+                return false;
+              }
+              subscribePromises.push(subscribeChunkedSubs(chunkedSubs, messageId));
+            }
+            Promise.all(subscribePromises).then((packets) => {
+              callback(null, subs, packets.at(-1));
+            }).catch((err) => {
+              callback(err, subs, err.packet);
+            });
+            return true;
+          };
+          if (this._storeProcessing || this._storeProcessingQueue.length > 0 || !subscribeProc()) {
+            this._storeProcessingQueue.push({
+              invoke: subscribeProc,
+              callback
+            });
+          }
+          return this;
+        }
+        subscribeAsync(topicObject, opts) {
+          return new Promise((resolve2, reject) => {
+            this.subscribe(topicObject, opts, (err, granted) => {
+              if (err) {
+                reject(err);
+              } else {
+                resolve2(granted);
+              }
+            });
+          });
+        }
+        unsubscribe(topic, opts, callback) {
+          if (typeof topic === "string") {
+            topic = [topic];
+          }
+          if (typeof opts === "function") {
+            callback = opts;
+          }
+          callback = callback || this.noop;
+          const invalidTopic = validations.validateTopics(topic);
+          if (invalidTopic !== null) {
+            setImmediate2(callback, new Error(`Invalid topic ${invalidTopic}`));
+            return this;
+          }
+          if (this._checkDisconnecting(callback)) {
+            return this;
+          }
+          const unsubscribeProc = () => {
+            const messageId = this._nextId();
+            if (messageId === null) {
+              this.log("No messageId left");
+              return false;
+            }
+            const packet = {
+              cmd: "unsubscribe",
+              messageId,
+              unsubscriptions: []
+            };
+            if (typeof topic === "string") {
+              packet.unsubscriptions = [topic];
+            } else if (Array.isArray(topic)) {
+              packet.unsubscriptions = topic;
+            }
+            if (this.options.resubscribe) {
+              packet.unsubscriptions.forEach((topic2) => {
+                delete this._resubscribeTopics[topic2];
+              });
+            }
+            if (typeof opts === "object" && opts.properties) {
+              packet.properties = opts.properties;
+            }
+            this.outgoing[packet.messageId] = {
+              volatile: true,
+              cb: callback
+            };
+            this.log("unsubscribe: call _sendPacket");
+            this._sendPacket(packet);
+            return true;
+          };
+          if (this._storeProcessing || this._storeProcessingQueue.length > 0 || !unsubscribeProc()) {
+            this._storeProcessingQueue.push({
+              invoke: unsubscribeProc,
+              callback
+            });
+          }
+          return this;
+        }
+        unsubscribeAsync(topic, opts) {
+          return new Promise((resolve2, reject) => {
+            this.unsubscribe(topic, opts, (err, packet) => {
+              if (err) {
+                reject(err);
+              } else {
+                resolve2(packet);
+              }
+            });
+          });
+        }
+        end(force, opts, cb) {
+          this.log("end :: (%s)", this.options.clientId);
+          if (force == null || typeof force !== "boolean") {
+            cb = cb || opts;
+            opts = force;
+            force = false;
+          }
+          if (typeof opts !== "object") {
+            cb = cb || opts;
+            opts = null;
+          }
+          this.log("end :: cb? %s", !!cb);
+          if (!cb || typeof cb !== "function") {
+            cb = this.noop;
+          }
+          const closeStores = () => {
+            this.log("end :: closeStores: closing incoming and outgoing stores");
+            this.disconnected = true;
+            this.incomingStore.close((e1) => {
+              this.outgoingStore.close((e2) => {
+                this.log("end :: closeStores: emitting end");
+                this.emit("end");
+                if (cb) {
+                  const err = e1 || e2;
+                  this.log("end :: closeStores: invoking callback with args");
+                  cb(err);
+                }
+              });
+            });
+            if (this._deferredReconnect) {
+              this._deferredReconnect();
+            } else if (this.options.reconnectPeriod === 0 || this.options.manualConnect) {
+              this.disconnecting = false;
+            }
+          };
+          const finish = () => {
+            this.log("end :: (%s) :: finish :: calling _cleanUp with force %s", this.options.clientId, force);
+            this._cleanUp(force, () => {
+              this.log("end :: finish :: calling process.nextTick on closeStores");
+              (0, shared_1.nextTick)(closeStores);
+            }, opts);
+          };
+          if (this.disconnecting) {
+            cb();
+            return this;
+          }
+          this._clearReconnect();
+          this.disconnecting = true;
+          if (!force && Object.keys(this.outgoing).length > 0) {
+            this.log("end :: (%s) :: calling finish in 10ms once outgoing is empty", this.options.clientId);
+            this.once("outgoingEmpty", setTimeout.bind(null, finish, 10));
+          } else {
+            this.log("end :: (%s) :: immediately calling finish", this.options.clientId);
+            finish();
+          }
+          return this;
+        }
+        endAsync(force, opts) {
+          return new Promise((resolve2, reject) => {
+            this.end(force, opts, (err) => {
+              if (err) {
+                reject(err);
+              } else {
+                resolve2();
+              }
+            });
+          });
+        }
+        removeOutgoingMessage(messageId) {
+          if (this.outgoing[messageId]) {
+            const { cb } = this.outgoing[messageId];
+            this._removeOutgoingAndStoreMessage(messageId, () => {
+              cb(new Error("Message removed"));
+            });
+          }
+          return this;
+        }
+        reconnect(opts) {
+          this.log("client reconnect");
+          const f = () => {
+            if (opts) {
+              this.options.incomingStore = opts.incomingStore;
+              this.options.outgoingStore = opts.outgoingStore;
+            } else {
+              this.options.incomingStore = null;
+              this.options.outgoingStore = null;
+            }
+            this.incomingStore = this.options.incomingStore || new store_1.default();
+            this.outgoingStore = this.options.outgoingStore || new store_1.default();
+            this.disconnecting = false;
+            this.disconnected = false;
+            this._deferredReconnect = null;
+            this._reconnect();
+          };
+          if (this.disconnecting && !this.disconnected) {
+            this._deferredReconnect = f;
+          } else {
+            f();
+          }
+          return this;
+        }
+        _flushVolatile() {
+          if (this.outgoing) {
+            this.log("_flushVolatile :: deleting volatile messages from the queue and setting their callbacks as error function");
+            Object.keys(this.outgoing).forEach((messageId) => {
+              if (this.outgoing[messageId].volatile && typeof this.outgoing[messageId].cb === "function") {
+                this.outgoing[messageId].cb(new Error("Connection closed"));
+                delete this.outgoing[messageId];
+              }
+            });
+          }
+        }
+        _flush() {
+          if (this.outgoing) {
+            this.log("_flush: queue exists? %b", !!this.outgoing);
+            Object.keys(this.outgoing).forEach((messageId) => {
+              if (typeof this.outgoing[messageId].cb === "function") {
+                this.outgoing[messageId].cb(new Error("Connection closed"));
+                delete this.outgoing[messageId];
+              }
+            });
+          }
+        }
+        _removeTopicAliasAndRecoverTopicName(packet) {
+          let alias;
+          if (packet.properties) {
+            alias = packet.properties.topicAlias;
+          }
+          let topic = packet.topic.toString();
+          this.log("_removeTopicAliasAndRecoverTopicName :: alias %d, topic %o", alias, topic);
+          if (topic.length === 0) {
+            if (typeof alias === "undefined") {
+              return new Error("Unregistered Topic Alias");
+            }
+            topic = this.topicAliasSend.getTopicByAlias(alias);
+            if (typeof topic === "undefined") {
+              return new Error("Unregistered Topic Alias");
+            }
+            packet.topic = topic;
+          }
+          if (alias) {
+            delete packet.properties.topicAlias;
+          }
+        }
+        _checkDisconnecting(callback) {
+          if (this.disconnecting) {
+            if (callback && callback !== this.noop) {
+              callback(new Error("client disconnecting"));
+            } else {
+              this.emit("error", new Error("client disconnecting"));
+            }
+          }
+          return this.disconnecting;
+        }
+        _reconnect() {
+          this.log("_reconnect: emitting reconnect to client");
+          this.emit("reconnect");
+          if (this.connected) {
+            this.end(() => {
+              this.connect();
+            });
+            this.log("client already connected. disconnecting first.");
+          } else {
+            this.log("_reconnect: calling connect");
+            this.connect();
+          }
+        }
+        _setupReconnect() {
+          if (!this.disconnecting && !this.reconnectTimer && this.options.reconnectPeriod > 0) {
+            if (!this.reconnecting) {
+              this.log("_setupReconnect :: emit `offline` state");
+              this.emit("offline");
+              this.log("_setupReconnect :: set `reconnecting` to `true`");
+              this.reconnecting = true;
+            }
+            this.log("_setupReconnect :: setting reconnectTimer for %d ms", this.options.reconnectPeriod);
+            this.reconnectTimer = setInterval(() => {
+              this.log("reconnectTimer :: reconnect triggered!");
+              this._reconnect();
+            }, this.options.reconnectPeriod);
+          } else {
+            this.log("_setupReconnect :: doing nothing...");
+          }
+        }
+        _clearReconnect() {
+          this.log("_clearReconnect : clearing reconnect timer");
+          if (this.reconnectTimer) {
+            clearInterval(this.reconnectTimer);
+            this.reconnectTimer = null;
+          }
+        }
+        _cleanUp(forced, done, opts = {}) {
+          if (done) {
+            this.log("_cleanUp :: done callback provided for on stream close");
+            this.stream.on("close", done);
+          }
+          this.log("_cleanUp :: forced? %s", forced);
+          if (forced) {
+            if (this.options.reconnectPeriod === 0 && this.options.clean) {
+              this._flush();
+            }
+            this.log("_cleanUp :: (%s) :: destroying stream", this.options.clientId);
+            this.stream.destroy();
+          } else {
+            const packet = { cmd: "disconnect", ...opts };
+            this.log("_cleanUp :: (%s) :: call _sendPacket with disconnect packet", this.options.clientId);
+            this._sendPacket(packet, () => {
+              this.log("_cleanUp :: (%s) :: destroying stream", this.options.clientId);
+              setImmediate2(() => {
+                this.stream.end(() => {
+                  this.log("_cleanUp :: (%s) :: stream destroyed", this.options.clientId);
+                });
+              });
+            });
+          }
+          if (!this.disconnecting && !this.reconnecting) {
+            this.log("_cleanUp :: client not disconnecting/reconnecting. Clearing and resetting reconnect.");
+            this._clearReconnect();
+            this._setupReconnect();
+          }
+          this._destroyKeepaliveManager();
+          if (done && !this.connected) {
+            this.log("_cleanUp :: (%s) :: removing stream `done` callback `close` listener", this.options.clientId);
+            this.stream.removeListener("close", done);
+            done();
+          }
+        }
+        _storeAndSend(packet, cb, cbStorePut) {
+          this.log("storeAndSend :: store packet with cmd %s to outgoingStore", packet.cmd);
+          let storePacket = packet;
+          let err;
+          if (storePacket.cmd === "publish") {
+            storePacket = (0, default_1.default)(packet);
+            err = this._removeTopicAliasAndRecoverTopicName(storePacket);
+            if (err) {
+              return cb && cb(err);
+            }
+          }
+          this.outgoingStore.put(storePacket, (err2) => {
+            if (err2) {
+              return cb && cb(err2);
+            }
+            cbStorePut();
+            this._writePacket(packet, cb);
+          });
+        }
+        _applyTopicAlias(packet) {
+          if (this.options.protocolVersion === 5) {
+            if (packet.cmd === "publish") {
+              let alias;
+              if (packet.properties) {
+                alias = packet.properties.topicAlias;
+              }
+              const topic = packet.topic.toString();
+              if (this.topicAliasSend) {
+                if (alias) {
+                  if (topic.length !== 0) {
+                    this.log("applyTopicAlias :: register topic: %s - alias: %d", topic, alias);
+                    if (!this.topicAliasSend.put(topic, alias)) {
+                      this.log("applyTopicAlias :: error out of range. topic: %s - alias: %d", topic, alias);
+                      return new Error("Sending Topic Alias out of range");
+                    }
+                  }
+                } else if (topic.length !== 0) {
+                  if (this.options.autoAssignTopicAlias) {
+                    alias = this.topicAliasSend.getAliasByTopic(topic);
+                    if (alias) {
+                      packet.topic = "";
+                      packet.properties = {
+                        ...packet.properties,
+                        topicAlias: alias
+                      };
+                      this.log("applyTopicAlias :: auto assign(use) topic: %s - alias: %d", topic, alias);
+                    } else {
+                      alias = this.topicAliasSend.getLruAlias();
+                      this.topicAliasSend.put(topic, alias);
+                      packet.properties = {
+                        ...packet.properties,
+                        topicAlias: alias
+                      };
+                      this.log("applyTopicAlias :: auto assign topic: %s - alias: %d", topic, alias);
+                    }
+                  } else if (this.options.autoUseTopicAlias) {
+                    alias = this.topicAliasSend.getAliasByTopic(topic);
+                    if (alias) {
+                      packet.topic = "";
+                      packet.properties = {
+                        ...packet.properties,
+                        topicAlias: alias
+                      };
+                      this.log("applyTopicAlias :: auto use topic: %s - alias: %d", topic, alias);
+                    }
+                  }
+                }
+              } else if (alias) {
+                this.log("applyTopicAlias :: error out of range. topic: %s - alias: %d", topic, alias);
+                return new Error("Sending Topic Alias out of range");
+              }
+            }
+          }
+        }
+        _noop(err) {
+          this.log("noop ::", err);
+        }
+        _writePacket(packet, cb) {
+          this.log("_writePacket :: packet: %O", packet);
+          this.log("_writePacket :: emitting `packetsend`");
+          this.emit("packetsend", packet);
+          this.log("_writePacket :: writing to stream");
+          const result = mqtt_packet_1.default.writeToStream(packet, this.stream, this.options);
+          this.log("_writePacket :: writeToStream result %s", result);
+          if (!result && cb && cb !== this.noop) {
+            this.log("_writePacket :: handle events on `drain` once through callback.");
+            this.stream.once("drain", cb);
+          } else if (cb) {
+            this.log("_writePacket :: invoking cb");
+            cb();
+          }
+        }
+        _sendPacket(packet, cb, cbStorePut, noStore) {
+          this.log("_sendPacket :: (%s) ::  start", this.options.clientId);
+          cbStorePut = cbStorePut || this.noop;
+          cb = cb || this.noop;
+          const err = this._applyTopicAlias(packet);
+          if (err) {
+            cb(err);
+            return;
+          }
+          if (!this.connected) {
+            if (packet.cmd === "auth") {
+              this._writePacket(packet, cb);
+              return;
+            }
+            this.log("_sendPacket :: client not connected. Storing packet offline.");
+            this._storePacket(packet, cb, cbStorePut);
+            return;
+          }
+          if (noStore) {
+            this._writePacket(packet, cb);
+            return;
+          }
+          switch (packet.cmd) {
+            case "publish":
+              break;
+            case "pubrel":
+              this._storeAndSend(packet, cb, cbStorePut);
+              return;
+            default:
+              this._writePacket(packet, cb);
+              return;
+          }
+          switch (packet.qos) {
+            case 2:
+            case 1:
+              this._storeAndSend(packet, cb, cbStorePut);
+              break;
+            case 0:
+            default:
+              this._writePacket(packet, cb);
+              break;
+          }
+          this.log("_sendPacket :: (%s) ::  end", this.options.clientId);
+        }
+        _storePacket(packet, cb, cbStorePut) {
+          this.log("_storePacket :: packet: %o", packet);
+          this.log("_storePacket :: cb? %s", !!cb);
+          cbStorePut = cbStorePut || this.noop;
+          let storePacket = packet;
+          if (storePacket.cmd === "publish") {
+            storePacket = (0, default_1.default)(packet);
+            const err = this._removeTopicAliasAndRecoverTopicName(storePacket);
+            if (err) {
+              return cb && cb(err);
+            }
+          }
+          const qos = storePacket.qos || 0;
+          if (qos === 0 && this.queueQoSZero || storePacket.cmd !== "publish") {
+            this.queue.push({ packet: storePacket, cb });
+          } else if (qos > 0) {
+            cb = this.outgoing[storePacket.messageId] ? this.outgoing[storePacket.messageId].cb : null;
+            this.outgoingStore.put(storePacket, (err) => {
+              if (err) {
+                return cb && cb(err);
+              }
+              cbStorePut();
+            });
+          } else if (cb) {
+            cb(new Error("No connection to broker"));
+          }
+        }
+        _setupKeepaliveManager() {
+          this.log("_setupKeepaliveManager :: keepalive %d (seconds)", this.options.keepalive);
+          if (!this.keepaliveManager && this.options.keepalive) {
+            this.keepaliveManager = new KeepaliveManager_1.default(this, this.options.timerVariant);
+          }
+        }
+        _destroyKeepaliveManager() {
+          if (this.keepaliveManager) {
+            this.log("_destroyKeepaliveManager :: destroying keepalive manager");
+            this.keepaliveManager.destroy();
+            this.keepaliveManager = null;
+          }
+        }
+        reschedulePing(force = false) {
+          if (this.keepaliveManager && this.options.keepalive && (force || this.options.reschedulePings)) {
+            this._reschedulePing();
+          }
+        }
+        _reschedulePing() {
+          this.log("_reschedulePing :: rescheduling ping");
+          this.keepaliveManager.reschedule();
+        }
+        sendPing() {
+          this.log("_sendPing :: sending pingreq");
+          this._sendPacket({ cmd: "pingreq" });
+        }
+        onKeepaliveTimeout() {
+          this.emit("error", new Error("Keepalive timeout"));
+          this.log("onKeepaliveTimeout :: calling _cleanUp with force true");
+          this._cleanUp(true);
+        }
+        _resubscribe() {
+          this.log("_resubscribe");
+          const _resubscribeTopicsKeys = Object.keys(this._resubscribeTopics);
+          if (!this._firstConnection && (this.options.clean || this.options.protocolVersion >= 4 && !this.connackPacket.sessionPresent) && _resubscribeTopicsKeys.length > 0) {
+            if (this.options.resubscribe) {
+              if (this.options.protocolVersion === 5) {
+                this.log("_resubscribe: protocolVersion 5");
+                for (let topicI = 0; topicI < _resubscribeTopicsKeys.length; topicI++) {
+                  const resubscribeTopic = {};
+                  resubscribeTopic[_resubscribeTopicsKeys[topicI]] = this._resubscribeTopics[_resubscribeTopicsKeys[topicI]];
+                  resubscribeTopic.resubscribe = true;
+                  this.subscribe(resubscribeTopic, {
+                    properties: resubscribeTopic[_resubscribeTopicsKeys[topicI]].properties
+                  });
+                }
+              } else {
+                this._resubscribeTopics.resubscribe = true;
+                this.subscribe(this._resubscribeTopics);
+              }
+            } else {
+              this._resubscribeTopics = {};
+            }
+          }
+          this._firstConnection = false;
+        }
+        _onConnect(packet) {
+          if (this.disconnected) {
+            this.emit("connect", packet);
+            return;
+          }
+          this.connackPacket = packet;
+          this.messageIdProvider.clear();
+          this._setupKeepaliveManager();
+          this.connected = true;
+          const startStreamProcess = () => {
+            let outStore = this.outgoingStore.createStream();
+            const remove = () => {
+              outStore.destroy();
+              outStore = null;
+              this._flushStoreProcessingQueue();
+              clearStoreProcessing();
+            };
+            const clearStoreProcessing = () => {
+              this._storeProcessing = false;
+              this._packetIdsDuringStoreProcessing = {};
+            };
+            this.once("close", remove);
+            outStore.on("error", (err) => {
+              clearStoreProcessing();
+              this._flushStoreProcessingQueue();
+              this.removeListener("close", remove);
+              this.emit("error", err);
+            });
+            const storeDeliver = () => {
+              if (!outStore) {
+                return;
+              }
+              const packet2 = outStore.read(1);
+              let cb;
+              if (!packet2) {
+                outStore.once("readable", storeDeliver);
+                return;
+              }
+              this._storeProcessing = true;
+              if (this._packetIdsDuringStoreProcessing[packet2.messageId]) {
+                storeDeliver();
+                return;
+              }
+              if (!this.disconnecting && !this.reconnectTimer) {
+                cb = this.outgoing[packet2.messageId] ? this.outgoing[packet2.messageId].cb : null;
+                this.outgoing[packet2.messageId] = {
+                  volatile: false,
+                  cb(err, status) {
+                    if (cb) {
+                      cb(err, status);
+                    }
+                    storeDeliver();
+                  }
+                };
+                this._packetIdsDuringStoreProcessing[packet2.messageId] = true;
+                if (this.messageIdProvider.register(packet2.messageId)) {
+                  this._sendPacket(packet2, void 0, void 0, true);
+                } else {
+                  this.log("messageId: %d has already used.", packet2.messageId);
+                }
+              } else if (outStore.destroy) {
+                outStore.destroy();
+              }
+            };
+            outStore.on("end", () => {
+              let allProcessed = true;
+              for (const id in this._packetIdsDuringStoreProcessing) {
+                if (!this._packetIdsDuringStoreProcessing[id]) {
+                  allProcessed = false;
+                  break;
+                }
+              }
+              this.removeListener("close", remove);
+              if (allProcessed) {
+                clearStoreProcessing();
+                this._invokeAllStoreProcessingQueue();
+                this.emit("connect", packet);
+              } else {
+                startStreamProcess();
+              }
+            });
+            storeDeliver();
+          };
+          startStreamProcess();
+        }
+        _invokeStoreProcessingQueue() {
+          if (!this._storeProcessing && this._storeProcessingQueue.length > 0) {
+            const f = this._storeProcessingQueue[0];
+            if (f && f.invoke()) {
+              this._storeProcessingQueue.shift();
+              return true;
+            }
+          }
+          return false;
+        }
+        _invokeAllStoreProcessingQueue() {
+          while (this._invokeStoreProcessingQueue()) {
+          }
+        }
+        _flushStoreProcessingQueue() {
+          for (const f of this._storeProcessingQueue) {
+            if (f.cbStorePut)
+              f.cbStorePut(new Error("Connection closed"));
+            if (f.callback)
+              f.callback(new Error("Connection closed"));
+          }
+          this._storeProcessingQueue.splice(0);
+        }
+        _removeOutgoingAndStoreMessage(messageId, cb) {
+          delete this.outgoing[messageId];
+          this.outgoingStore.del({ messageId }, (err, packet) => {
+            cb(err, packet);
+            this.messageIdProvider.deallocate(messageId);
+            this._invokeStoreProcessingQueue();
+          });
+        }
+      };
+      exports8.default = MqttClient;
+    }
+  });
+
+  // build/lib/unique-message-id-provider.js
+  var require_unique_message_id_provider = __commonJS({
+    "build/lib/unique-message-id-provider.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var number_allocator_1 = require_number_allocator2();
+      var UniqueMessageIdProvider = class {
+        numberAllocator;
+        lastId;
+        constructor() {
+          this.numberAllocator = new number_allocator_1.NumberAllocator(1, 65535);
+        }
+        allocate() {
+          this.lastId = this.numberAllocator.alloc();
+          return this.lastId;
+        }
+        getLastAllocated() {
+          return this.lastId;
+        }
+        register(messageId) {
+          return this.numberAllocator.use(messageId);
+        }
+        deallocate(messageId) {
+          this.numberAllocator.free(messageId);
+        }
+        clear() {
+          this.numberAllocator.clear();
+        }
+      };
+      exports8.default = UniqueMessageIdProvider;
+    }
+  });
+
+  // node_modules/@jspm/core/nodelibs/browser/punycode.js
+  function dew3() {
+    if (_dewExec3) return exports$13;
+    _dewExec3 = true;
+    const maxInt = 2147483647;
+    const base = 36;
+    const tMin = 1;
+    const tMax = 26;
+    const skew = 38;
+    const damp = 700;
+    const initialBias = 72;
+    const initialN = 128;
+    const delimiter = "-";
+    const regexPunycode = /^xn--/;
+    const regexNonASCII = /[^\0-\x7F]/;
+    const regexSeparators = /[\x2E\u3002\uFF0E\uFF61]/g;
+    const errors = {
+      "overflow": "Overflow: input needs wider integers to process",
+      "not-basic": "Illegal input >= 0x80 (not a basic code point)",
+      "invalid-input": "Invalid input"
+    };
+    const baseMinusTMin = base - tMin;
+    const floor = Math.floor;
+    const stringFromCharCode = String.fromCharCode;
+    function error(type) {
+      throw new RangeError(errors[type]);
+    }
+    function map(array, callback) {
+      const result = [];
+      let length = array.length;
+      while (length--) {
+        result[length] = callback(array[length]);
+      }
+      return result;
+    }
+    function mapDomain(domain3, callback) {
+      const parts = domain3.split("@");
+      let result = "";
+      if (parts.length > 1) {
+        result = parts[0] + "@";
+        domain3 = parts[1];
+      }
+      domain3 = domain3.replace(regexSeparators, ".");
+      const labels = domain3.split(".");
+      const encoded = map(labels, callback).join(".");
+      return result + encoded;
+    }
+    function ucs2decode(string) {
+      const output = [];
+      let counter = 0;
+      const length = string.length;
+      while (counter < length) {
+        const value = string.charCodeAt(counter++);
+        if (value >= 55296 && value <= 56319 && counter < length) {
+          const extra = string.charCodeAt(counter++);
+          if ((extra & 64512) == 56320) {
+            output.push(((value & 1023) << 10) + (extra & 1023) + 65536);
+          } else {
+            output.push(value);
+            counter--;
+          }
+        } else {
+          output.push(value);
+        }
+      }
+      return output;
+    }
+    const ucs2encode = (codePoints) => String.fromCodePoint(...codePoints);
+    const basicToDigit = function(codePoint) {
+      if (codePoint >= 48 && codePoint < 58) {
+        return 26 + (codePoint - 48);
+      }
+      if (codePoint >= 65 && codePoint < 91) {
+        return codePoint - 65;
+      }
+      if (codePoint >= 97 && codePoint < 123) {
+        return codePoint - 97;
+      }
+      return base;
+    };
+    const digitToBasic = function(digit, flag) {
+      return digit + 22 + 75 * (digit < 26) - ((flag != 0) << 5);
+    };
+    const adapt = function(delta, numPoints, firstTime) {
+      let k = 0;
+      delta = firstTime ? floor(delta / damp) : delta >> 1;
+      delta += floor(delta / numPoints);
+      for (; delta > baseMinusTMin * tMax >> 1; k += base) {
+        delta = floor(delta / baseMinusTMin);
+      }
+      return floor(k + (baseMinusTMin + 1) * delta / (delta + skew));
+    };
+    const decode2 = function(input) {
+      const output = [];
+      const inputLength = input.length;
+      let i = 0;
+      let n = initialN;
+      let bias = initialBias;
+      let basic = input.lastIndexOf(delimiter);
+      if (basic < 0) {
+        basic = 0;
+      }
+      for (let j = 0; j < basic; ++j) {
+        if (input.charCodeAt(j) >= 128) {
+          error("not-basic");
+        }
+        output.push(input.charCodeAt(j));
+      }
+      for (let index = basic > 0 ? basic + 1 : 0; index < inputLength; ) {
+        const oldi = i;
+        for (let w = 1, k = base; ; k += base) {
+          if (index >= inputLength) {
+            error("invalid-input");
+          }
+          const digit = basicToDigit(input.charCodeAt(index++));
+          if (digit >= base) {
+            error("invalid-input");
+          }
+          if (digit > floor((maxInt - i) / w)) {
+            error("overflow");
+          }
+          i += digit * w;
+          const t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;
+          if (digit < t) {
+            break;
+          }
+          const baseMinusT = base - t;
+          if (w > floor(maxInt / baseMinusT)) {
+            error("overflow");
+          }
+          w *= baseMinusT;
+        }
+        const out = output.length + 1;
+        bias = adapt(i - oldi, out, oldi == 0);
+        if (floor(i / out) > maxInt - n) {
+          error("overflow");
+        }
+        n += floor(i / out);
+        i %= out;
+        output.splice(i++, 0, n);
+      }
+      return String.fromCodePoint(...output);
+    };
+    const encode2 = function(input) {
+      const output = [];
+      input = ucs2decode(input);
+      const inputLength = input.length;
+      let n = initialN;
+      let delta = 0;
+      let bias = initialBias;
+      for (const currentValue of input) {
+        if (currentValue < 128) {
+          output.push(stringFromCharCode(currentValue));
+        }
+      }
+      const basicLength = output.length;
+      let handledCPCount = basicLength;
+      if (basicLength) {
+        output.push(delimiter);
+      }
+      while (handledCPCount < inputLength) {
+        let m = maxInt;
+        for (const currentValue of input) {
+          if (currentValue >= n && currentValue < m) {
+            m = currentValue;
+          }
+        }
+        const handledCPCountPlusOne = handledCPCount + 1;
+        if (m - n > floor((maxInt - delta) / handledCPCountPlusOne)) {
+          error("overflow");
+        }
+        delta += (m - n) * handledCPCountPlusOne;
+        n = m;
+        for (const currentValue of input) {
+          if (currentValue < n && ++delta > maxInt) {
+            error("overflow");
+          }
+          if (currentValue === n) {
+            let q = delta;
+            for (let k = base; ; k += base) {
+              const t = k <= bias ? tMin : k >= bias + tMax ? tMax : k - bias;
+              if (q < t) {
+                break;
+              }
+              const qMinusT = q - t;
+              const baseMinusT = base - t;
+              output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT, 0)));
+              q = floor(qMinusT / baseMinusT);
+            }
+            output.push(stringFromCharCode(digitToBasic(q, 0)));
+            bias = adapt(delta, handledCPCountPlusOne, handledCPCount === basicLength);
+            delta = 0;
+            ++handledCPCount;
+          }
+        }
+        ++delta;
+        ++n;
+      }
+      return output.join("");
+    };
+    const toUnicode2 = function(input) {
+      return mapDomain(input, function(string) {
+        return regexPunycode.test(string) ? decode2(string.slice(4).toLowerCase()) : string;
+      });
+    };
+    const toASCII2 = function(input) {
+      return mapDomain(input, function(string) {
+        return regexNonASCII.test(string) ? "xn--" + encode2(string) : string;
+      });
+    };
+    const punycode = {
+      /**
+       * A string representing the current Punycode.js version number.
+       * @memberOf punycode
+       * @type String
+       */
+      "version": "2.3.1",
+      /**
+       * An object of methods to convert from JavaScript's internal character
+       * representation (UCS-2) to Unicode code points, and back.
+       * @see <https://mathiasbynens.be/notes/javascript-encoding>
+       * @memberOf punycode
+       * @type Object
+       */
+      "ucs2": {
+        "decode": ucs2decode,
+        "encode": ucs2encode
+      },
+      "decode": decode2,
+      "encode": encode2,
+      "toASCII": toASCII2,
+      "toUnicode": toUnicode2
+    };
+    exports$13 = punycode;
+    return exports$13;
+  }
+  var exports$13, _dewExec3, exports4, decode, encode, toASCII, toUnicode, ucs2, version2;
+  var init_punycode = __esm({
+    "node_modules/@jspm/core/nodelibs/browser/punycode.js"() {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      exports$13 = {};
+      _dewExec3 = false;
+      exports4 = dew3();
+      decode = exports4.decode;
+      encode = exports4.encode;
+      toASCII = exports4.toASCII;
+      toUnicode = exports4.toUnicode;
+      ucs2 = exports4.ucs2;
+      version2 = exports4.version;
+    }
+  });
+
+  // node_modules/@jspm/core/nodelibs/browser/chunk-DtcTpLWz.js
+  function dew$k() {
+    if (_dewExec$k) return exports$k;
+    _dewExec$k = true;
+    exports$k = function hasSymbols() {
+      if (typeof Symbol !== "function" || typeof Object.getOwnPropertySymbols !== "function") {
+        return false;
+      }
+      if (typeof Symbol.iterator === "symbol") {
+        return true;
+      }
+      var obj = {};
+      var sym = Symbol("test");
+      var symObj = Object(sym);
+      if (typeof sym === "string") {
+        return false;
+      }
+      if (Object.prototype.toString.call(sym) !== "[object Symbol]") {
+        return false;
+      }
+      if (Object.prototype.toString.call(symObj) !== "[object Symbol]") {
+        return false;
+      }
+      var symVal = 42;
+      obj[sym] = symVal;
+      for (sym in obj) {
+        return false;
+      }
+      if (typeof Object.keys === "function" && Object.keys(obj).length !== 0) {
+        return false;
+      }
+      if (typeof Object.getOwnPropertyNames === "function" && Object.getOwnPropertyNames(obj).length !== 0) {
+        return false;
+      }
+      var syms = Object.getOwnPropertySymbols(obj);
+      if (syms.length !== 1 || syms[0] !== sym) {
+        return false;
+      }
+      if (!Object.prototype.propertyIsEnumerable.call(obj, sym)) {
+        return false;
+      }
+      if (typeof Object.getOwnPropertyDescriptor === "function") {
+        var descriptor = Object.getOwnPropertyDescriptor(obj, sym);
+        if (descriptor.value !== symVal || descriptor.enumerable !== true) {
+          return false;
+        }
+      }
+      return true;
+    };
+    return exports$k;
+  }
+  function dew$j() {
+    if (_dewExec$j) return exports$j;
+    _dewExec$j = true;
+    exports$j = Error;
+    return exports$j;
+  }
+  function dew$i() {
+    if (_dewExec$i) return exports$i;
+    _dewExec$i = true;
+    exports$i = EvalError;
+    return exports$i;
+  }
+  function dew$h() {
+    if (_dewExec$h) return exports$h;
+    _dewExec$h = true;
+    exports$h = RangeError;
+    return exports$h;
+  }
+  function dew$g() {
+    if (_dewExec$g) return exports$g;
+    _dewExec$g = true;
+    exports$g = ReferenceError;
+    return exports$g;
+  }
+  function dew$f() {
+    if (_dewExec$f) return exports$f;
+    _dewExec$f = true;
+    exports$f = SyntaxError;
+    return exports$f;
+  }
+  function dew$e() {
+    if (_dewExec$e) return exports$e;
+    _dewExec$e = true;
+    exports$e = TypeError;
+    return exports$e;
+  }
+  function dew$d() {
+    if (_dewExec$d) return exports$d;
+    _dewExec$d = true;
+    exports$d = URIError;
+    return exports$d;
+  }
+  function dew$c() {
+    if (_dewExec$c) return exports$c;
+    _dewExec$c = true;
+    var origSymbol = typeof Symbol !== "undefined" && Symbol;
+    var hasSymbolSham = dew$k();
+    exports$c = function hasNativeSymbols() {
+      if (typeof origSymbol !== "function") {
+        return false;
+      }
+      if (typeof Symbol !== "function") {
+        return false;
+      }
+      if (typeof origSymbol("foo") !== "symbol") {
+        return false;
+      }
+      if (typeof Symbol("bar") !== "symbol") {
+        return false;
+      }
+      return hasSymbolSham();
+    };
+    return exports$c;
+  }
+  function dew$b() {
+    if (_dewExec$b) return exports$b;
+    _dewExec$b = true;
+    var test = {
+      __proto__: null,
+      foo: {}
+    };
+    var $Object = Object;
+    exports$b = function hasProto() {
+      return {
+        __proto__: test
+      }.foo === test.foo && !(test instanceof $Object);
+    };
+    return exports$b;
+  }
+  function dew$a() {
+    if (_dewExec$a) return exports$a;
+    _dewExec$a = true;
+    var ERROR_MESSAGE = "Function.prototype.bind called on incompatible ";
+    var toStr = Object.prototype.toString;
+    var max = Math.max;
+    var funcType = "[object Function]";
+    var concatty = function concatty2(a, b) {
+      var arr = [];
+      for (var i = 0; i < a.length; i += 1) {
+        arr[i] = a[i];
+      }
+      for (var j = 0; j < b.length; j += 1) {
+        arr[j + a.length] = b[j];
+      }
+      return arr;
+    };
+    var slicy = function slicy2(arrLike, offset) {
+      var arr = [];
+      for (var i = offset, j = 0; i < arrLike.length; i += 1, j += 1) {
+        arr[j] = arrLike[i];
+      }
+      return arr;
+    };
+    var joiny = function(arr, joiner) {
+      var str = "";
+      for (var i = 0; i < arr.length; i += 1) {
+        str += arr[i];
+        if (i + 1 < arr.length) {
+          str += joiner;
+        }
+      }
+      return str;
+    };
+    exports$a = function bind(that) {
+      var target = this;
+      if (typeof target !== "function" || toStr.apply(target) !== funcType) {
+        throw new TypeError(ERROR_MESSAGE + target);
+      }
+      var args = slicy(arguments, 1);
+      var bound;
+      var binder = function() {
+        if (this instanceof bound) {
+          var result = target.apply(this, concatty(args, arguments));
+          if (Object(result) === result) {
+            return result;
+          }
+          return this;
+        }
+        return target.apply(that, concatty(args, arguments));
+      };
+      var boundLength = max(0, target.length - args.length);
+      var boundArgs = [];
+      for (var i = 0; i < boundLength; i++) {
+        boundArgs[i] = "$" + i;
+      }
+      bound = Function("binder", "return function (" + joiny(boundArgs, ",") + "){ return binder.apply(this,arguments); }")(binder);
+      if (target.prototype) {
+        var Empty = function Empty2() {
+        };
+        Empty.prototype = target.prototype;
+        bound.prototype = new Empty();
+        Empty.prototype = null;
+      }
+      return bound;
+    };
+    return exports$a;
+  }
+  function dew$9() {
+    if (_dewExec$9) return exports$9;
+    _dewExec$9 = true;
+    var implementation = dew$a();
+    exports$9 = Function.prototype.bind || implementation;
+    return exports$9;
+  }
+  function dew$8() {
+    if (_dewExec$8) return exports$8;
+    _dewExec$8 = true;
+    var call = Function.prototype.call;
+    var $hasOwn = Object.prototype.hasOwnProperty;
+    var bind = dew$9();
+    exports$8 = bind.call(call, $hasOwn);
+    return exports$8;
+  }
+  function dew$7() {
+    if (_dewExec$7) return exports$7;
+    _dewExec$7 = true;
+    var undefined$1;
+    var $Error = dew$j();
+    var $EvalError = dew$i();
+    var $RangeError = dew$h();
+    var $ReferenceError = dew$g();
+    var $SyntaxError = dew$f();
+    var $TypeError = dew$e();
+    var $URIError = dew$d();
+    var $Function = Function;
+    var getEvalledConstructor = function(expressionSyntax) {
+      try {
+        return $Function('"use strict"; return (' + expressionSyntax + ").constructor;")();
+      } catch (e) {
+      }
+    };
+    var $gOPD = Object.getOwnPropertyDescriptor;
+    if ($gOPD) {
+      try {
+        $gOPD({}, "");
+      } catch (e) {
+        $gOPD = null;
+      }
+    }
+    var throwTypeError = function() {
+      throw new $TypeError();
+    };
+    var ThrowTypeError = $gOPD ? (function() {
+      try {
+        arguments.callee;
+        return throwTypeError;
+      } catch (calleeThrows) {
+        try {
+          return $gOPD(arguments, "callee").get;
+        } catch (gOPDthrows) {
+          return throwTypeError;
+        }
+      }
+    })() : throwTypeError;
+    var hasSymbols = dew$c()();
+    var hasProto = dew$b()();
+    var getProto = Object.getPrototypeOf || (hasProto ? function(x) {
+      return x.__proto__;
+    } : null);
+    var needsEval = {};
+    var TypedArray = typeof Uint8Array === "undefined" || !getProto ? undefined$1 : getProto(Uint8Array);
+    var INTRINSICS = {
+      __proto__: null,
+      "%AggregateError%": typeof AggregateError === "undefined" ? undefined$1 : AggregateError,
+      "%Array%": Array,
+      "%ArrayBuffer%": typeof ArrayBuffer === "undefined" ? undefined$1 : ArrayBuffer,
+      "%ArrayIteratorPrototype%": hasSymbols && getProto ? getProto([][Symbol.iterator]()) : undefined$1,
+      "%AsyncFromSyncIteratorPrototype%": undefined$1,
+      "%AsyncFunction%": needsEval,
+      "%AsyncGenerator%": needsEval,
+      "%AsyncGeneratorFunction%": needsEval,
+      "%AsyncIteratorPrototype%": needsEval,
+      "%Atomics%": typeof Atomics === "undefined" ? undefined$1 : Atomics,
+      "%BigInt%": typeof BigInt === "undefined" ? undefined$1 : BigInt,
+      "%BigInt64Array%": typeof BigInt64Array === "undefined" ? undefined$1 : BigInt64Array,
+      "%BigUint64Array%": typeof BigUint64Array === "undefined" ? undefined$1 : BigUint64Array,
+      "%Boolean%": Boolean,
+      "%DataView%": typeof DataView === "undefined" ? undefined$1 : DataView,
+      "%Date%": Date,
+      "%decodeURI%": decodeURI,
+      "%decodeURIComponent%": decodeURIComponent,
+      "%encodeURI%": encodeURI,
+      "%encodeURIComponent%": encodeURIComponent,
+      "%Error%": $Error,
+      "%eval%": eval,
+      // eslint-disable-line no-eval
+      "%EvalError%": $EvalError,
+      "%Float32Array%": typeof Float32Array === "undefined" ? undefined$1 : Float32Array,
+      "%Float64Array%": typeof Float64Array === "undefined" ? undefined$1 : Float64Array,
+      "%FinalizationRegistry%": typeof FinalizationRegistry === "undefined" ? undefined$1 : FinalizationRegistry,
+      "%Function%": $Function,
+      "%GeneratorFunction%": needsEval,
+      "%Int8Array%": typeof Int8Array === "undefined" ? undefined$1 : Int8Array,
+      "%Int16Array%": typeof Int16Array === "undefined" ? undefined$1 : Int16Array,
+      "%Int32Array%": typeof Int32Array === "undefined" ? undefined$1 : Int32Array,
+      "%isFinite%": isFinite,
+      "%isNaN%": isNaN,
+      "%IteratorPrototype%": hasSymbols && getProto ? getProto(getProto([][Symbol.iterator]())) : undefined$1,
+      "%JSON%": typeof JSON === "object" ? JSON : undefined$1,
+      "%Map%": typeof Map === "undefined" ? undefined$1 : Map,
+      "%MapIteratorPrototype%": typeof Map === "undefined" || !hasSymbols || !getProto ? undefined$1 : getProto((/* @__PURE__ */ new Map())[Symbol.iterator]()),
+      "%Math%": Math,
+      "%Number%": Number,
+      "%Object%": Object,
+      "%parseFloat%": parseFloat,
+      "%parseInt%": parseInt,
+      "%Promise%": typeof Promise === "undefined" ? undefined$1 : Promise,
+      "%Proxy%": typeof Proxy === "undefined" ? undefined$1 : Proxy,
+      "%RangeError%": $RangeError,
+      "%ReferenceError%": $ReferenceError,
+      "%Reflect%": typeof Reflect === "undefined" ? undefined$1 : Reflect,
+      "%RegExp%": RegExp,
+      "%Set%": typeof Set === "undefined" ? undefined$1 : Set,
+      "%SetIteratorPrototype%": typeof Set === "undefined" || !hasSymbols || !getProto ? undefined$1 : getProto((/* @__PURE__ */ new Set())[Symbol.iterator]()),
+      "%SharedArrayBuffer%": typeof SharedArrayBuffer === "undefined" ? undefined$1 : SharedArrayBuffer,
+      "%String%": String,
+      "%StringIteratorPrototype%": hasSymbols && getProto ? getProto(""[Symbol.iterator]()) : undefined$1,
+      "%Symbol%": hasSymbols ? Symbol : undefined$1,
+      "%SyntaxError%": $SyntaxError,
+      "%ThrowTypeError%": ThrowTypeError,
+      "%TypedArray%": TypedArray,
+      "%TypeError%": $TypeError,
+      "%Uint8Array%": typeof Uint8Array === "undefined" ? undefined$1 : Uint8Array,
+      "%Uint8ClampedArray%": typeof Uint8ClampedArray === "undefined" ? undefined$1 : Uint8ClampedArray,
+      "%Uint16Array%": typeof Uint16Array === "undefined" ? undefined$1 : Uint16Array,
+      "%Uint32Array%": typeof Uint32Array === "undefined" ? undefined$1 : Uint32Array,
+      "%URIError%": $URIError,
+      "%WeakMap%": typeof WeakMap === "undefined" ? undefined$1 : WeakMap,
+      "%WeakRef%": typeof WeakRef === "undefined" ? undefined$1 : WeakRef,
+      "%WeakSet%": typeof WeakSet === "undefined" ? undefined$1 : WeakSet
+    };
+    if (getProto) {
+      try {
+        null.error;
+      } catch (e) {
+        var errorProto = getProto(getProto(e));
+        INTRINSICS["%Error.prototype%"] = errorProto;
+      }
+    }
+    var doEval = function doEval2(name2) {
+      var value;
+      if (name2 === "%AsyncFunction%") {
+        value = getEvalledConstructor("async function () {}");
+      } else if (name2 === "%GeneratorFunction%") {
+        value = getEvalledConstructor("function* () {}");
+      } else if (name2 === "%AsyncGeneratorFunction%") {
+        value = getEvalledConstructor("async function* () {}");
+      } else if (name2 === "%AsyncGenerator%") {
+        var fn = doEval2("%AsyncGeneratorFunction%");
+        if (fn) {
+          value = fn.prototype;
+        }
+      } else if (name2 === "%AsyncIteratorPrototype%") {
+        var gen = doEval2("%AsyncGenerator%");
+        if (gen && getProto) {
+          value = getProto(gen.prototype);
+        }
+      }
+      INTRINSICS[name2] = value;
+      return value;
+    };
+    var LEGACY_ALIASES = {
+      __proto__: null,
+      "%ArrayBufferPrototype%": ["ArrayBuffer", "prototype"],
+      "%ArrayPrototype%": ["Array", "prototype"],
+      "%ArrayProto_entries%": ["Array", "prototype", "entries"],
+      "%ArrayProto_forEach%": ["Array", "prototype", "forEach"],
+      "%ArrayProto_keys%": ["Array", "prototype", "keys"],
+      "%ArrayProto_values%": ["Array", "prototype", "values"],
+      "%AsyncFunctionPrototype%": ["AsyncFunction", "prototype"],
+      "%AsyncGenerator%": ["AsyncGeneratorFunction", "prototype"],
+      "%AsyncGeneratorPrototype%": ["AsyncGeneratorFunction", "prototype", "prototype"],
+      "%BooleanPrototype%": ["Boolean", "prototype"],
+      "%DataViewPrototype%": ["DataView", "prototype"],
+      "%DatePrototype%": ["Date", "prototype"],
+      "%ErrorPrototype%": ["Error", "prototype"],
+      "%EvalErrorPrototype%": ["EvalError", "prototype"],
+      "%Float32ArrayPrototype%": ["Float32Array", "prototype"],
+      "%Float64ArrayPrototype%": ["Float64Array", "prototype"],
+      "%FunctionPrototype%": ["Function", "prototype"],
+      "%Generator%": ["GeneratorFunction", "prototype"],
+      "%GeneratorPrototype%": ["GeneratorFunction", "prototype", "prototype"],
+      "%Int8ArrayPrototype%": ["Int8Array", "prototype"],
+      "%Int16ArrayPrototype%": ["Int16Array", "prototype"],
+      "%Int32ArrayPrototype%": ["Int32Array", "prototype"],
+      "%JSONParse%": ["JSON", "parse"],
+      "%JSONStringify%": ["JSON", "stringify"],
+      "%MapPrototype%": ["Map", "prototype"],
+      "%NumberPrototype%": ["Number", "prototype"],
+      "%ObjectPrototype%": ["Object", "prototype"],
+      "%ObjProto_toString%": ["Object", "prototype", "toString"],
+      "%ObjProto_valueOf%": ["Object", "prototype", "valueOf"],
+      "%PromisePrototype%": ["Promise", "prototype"],
+      "%PromiseProto_then%": ["Promise", "prototype", "then"],
+      "%Promise_all%": ["Promise", "all"],
+      "%Promise_reject%": ["Promise", "reject"],
+      "%Promise_resolve%": ["Promise", "resolve"],
+      "%RangeErrorPrototype%": ["RangeError", "prototype"],
+      "%ReferenceErrorPrototype%": ["ReferenceError", "prototype"],
+      "%RegExpPrototype%": ["RegExp", "prototype"],
+      "%SetPrototype%": ["Set", "prototype"],
+      "%SharedArrayBufferPrototype%": ["SharedArrayBuffer", "prototype"],
+      "%StringPrototype%": ["String", "prototype"],
+      "%SymbolPrototype%": ["Symbol", "prototype"],
+      "%SyntaxErrorPrototype%": ["SyntaxError", "prototype"],
+      "%TypedArrayPrototype%": ["TypedArray", "prototype"],
+      "%TypeErrorPrototype%": ["TypeError", "prototype"],
+      "%Uint8ArrayPrototype%": ["Uint8Array", "prototype"],
+      "%Uint8ClampedArrayPrototype%": ["Uint8ClampedArray", "prototype"],
+      "%Uint16ArrayPrototype%": ["Uint16Array", "prototype"],
+      "%Uint32ArrayPrototype%": ["Uint32Array", "prototype"],
+      "%URIErrorPrototype%": ["URIError", "prototype"],
+      "%WeakMapPrototype%": ["WeakMap", "prototype"],
+      "%WeakSetPrototype%": ["WeakSet", "prototype"]
+    };
+    var bind = dew$9();
+    var hasOwn = dew$8();
+    var $concat = bind.call(Function.call, Array.prototype.concat);
+    var $spliceApply = bind.call(Function.apply, Array.prototype.splice);
+    var $replace = bind.call(Function.call, String.prototype.replace);
+    var $strSlice = bind.call(Function.call, String.prototype.slice);
+    var $exec = bind.call(Function.call, RegExp.prototype.exec);
+    var rePropName = /[^%.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|%$))/g;
+    var reEscapeChar = /\\(\\)?/g;
+    var stringToPath = function stringToPath2(string) {
+      var first = $strSlice(string, 0, 1);
+      var last = $strSlice(string, -1);
+      if (first === "%" && last !== "%") {
+        throw new $SyntaxError("invalid intrinsic syntax, expected closing `%`");
+      } else if (last === "%" && first !== "%") {
+        throw new $SyntaxError("invalid intrinsic syntax, expected opening `%`");
+      }
+      var result = [];
+      $replace(string, rePropName, function(match, number, quote, subString) {
+        result[result.length] = quote ? $replace(subString, reEscapeChar, "$1") : number || match;
+      });
+      return result;
+    };
+    var getBaseIntrinsic = function getBaseIntrinsic2(name2, allowMissing) {
+      var intrinsicName = name2;
+      var alias;
+      if (hasOwn(LEGACY_ALIASES, intrinsicName)) {
+        alias = LEGACY_ALIASES[intrinsicName];
+        intrinsicName = "%" + alias[0] + "%";
+      }
+      if (hasOwn(INTRINSICS, intrinsicName)) {
+        var value = INTRINSICS[intrinsicName];
+        if (value === needsEval) {
+          value = doEval(intrinsicName);
+        }
+        if (typeof value === "undefined" && !allowMissing) {
+          throw new $TypeError("intrinsic " + name2 + " exists, but is not available. Please file an issue!");
+        }
+        return {
+          alias,
+          name: intrinsicName,
+          value
+        };
+      }
+      throw new $SyntaxError("intrinsic " + name2 + " does not exist!");
+    };
+    exports$7 = function GetIntrinsic(name2, allowMissing) {
+      if (typeof name2 !== "string" || name2.length === 0) {
+        throw new $TypeError("intrinsic name must be a non-empty string");
+      }
+      if (arguments.length > 1 && typeof allowMissing !== "boolean") {
+        throw new $TypeError('"allowMissing" argument must be a boolean');
+      }
+      if ($exec(/^%?[^%]*%?$/, name2) === null) {
+        throw new $SyntaxError("`%` may not be present anywhere but at the beginning and end of the intrinsic name");
+      }
+      var parts = stringToPath(name2);
+      var intrinsicBaseName = parts.length > 0 ? parts[0] : "";
+      var intrinsic = getBaseIntrinsic("%" + intrinsicBaseName + "%", allowMissing);
+      var intrinsicRealName = intrinsic.name;
+      var value = intrinsic.value;
+      var skipFurtherCaching = false;
+      var alias = intrinsic.alias;
+      if (alias) {
+        intrinsicBaseName = alias[0];
+        $spliceApply(parts, $concat([0, 1], alias));
+      }
+      for (var i = 1, isOwn = true; i < parts.length; i += 1) {
+        var part = parts[i];
+        var first = $strSlice(part, 0, 1);
+        var last = $strSlice(part, -1);
+        if ((first === '"' || first === "'" || first === "`" || last === '"' || last === "'" || last === "`") && first !== last) {
+          throw new $SyntaxError("property names with quotes must have matching quotes");
+        }
+        if (part === "constructor" || !isOwn) {
+          skipFurtherCaching = true;
+        }
+        intrinsicBaseName += "." + part;
+        intrinsicRealName = "%" + intrinsicBaseName + "%";
+        if (hasOwn(INTRINSICS, intrinsicRealName)) {
+          value = INTRINSICS[intrinsicRealName];
+        } else if (value != null) {
+          if (!(part in value)) {
+            if (!allowMissing) {
+              throw new $TypeError("base intrinsic for " + name2 + " exists, but the property is not available.");
+            }
+            return void undefined$1;
+          }
+          if ($gOPD && i + 1 >= parts.length) {
+            var desc = $gOPD(value, part);
+            isOwn = !!desc;
+            if (isOwn && "get" in desc && !("originalValue" in desc.get)) {
+              value = desc.get;
+            } else {
+              value = value[part];
+            }
+          } else {
+            isOwn = hasOwn(value, part);
+            value = value[part];
+          }
+          if (isOwn && !skipFurtherCaching) {
+            INTRINSICS[intrinsicRealName] = value;
+          }
+        }
+      }
+      return value;
+    };
+    return exports$7;
+  }
+  function dew$6() {
+    if (_dewExec$6) return exports$6;
+    _dewExec$6 = true;
+    var GetIntrinsic = dew$7();
+    var $defineProperty = GetIntrinsic("%Object.defineProperty%", true) || false;
+    if ($defineProperty) {
+      try {
+        $defineProperty({}, "a", {
+          value: 1
+        });
+      } catch (e) {
+        $defineProperty = false;
+      }
+    }
+    exports$6 = $defineProperty;
+    return exports$6;
+  }
+  function dew$5() {
+    if (_dewExec$5) return exports$5;
+    _dewExec$5 = true;
+    var GetIntrinsic = dew$7();
+    var $gOPD = GetIntrinsic("%Object.getOwnPropertyDescriptor%", true);
+    if ($gOPD) {
+      try {
+        $gOPD([], "length");
+      } catch (e) {
+        $gOPD = null;
+      }
+    }
+    exports$5 = $gOPD;
+    return exports$5;
+  }
+  function dew$4() {
+    if (_dewExec$4) return exports$4;
+    _dewExec$4 = true;
+    var $defineProperty = dew$6();
+    var $SyntaxError = dew$f();
+    var $TypeError = dew$e();
+    var gopd = dew$5();
+    exports$4 = function defineDataProperty(obj, property, value) {
+      if (!obj || typeof obj !== "object" && typeof obj !== "function") {
+        throw new $TypeError("`obj` must be an object or a function`");
+      }
+      if (typeof property !== "string" && typeof property !== "symbol") {
+        throw new $TypeError("`property` must be a string or a symbol`");
+      }
+      if (arguments.length > 3 && typeof arguments[3] !== "boolean" && arguments[3] !== null) {
+        throw new $TypeError("`nonEnumerable`, if provided, must be a boolean or null");
+      }
+      if (arguments.length > 4 && typeof arguments[4] !== "boolean" && arguments[4] !== null) {
+        throw new $TypeError("`nonWritable`, if provided, must be a boolean or null");
+      }
+      if (arguments.length > 5 && typeof arguments[5] !== "boolean" && arguments[5] !== null) {
+        throw new $TypeError("`nonConfigurable`, if provided, must be a boolean or null");
+      }
+      if (arguments.length > 6 && typeof arguments[6] !== "boolean") {
+        throw new $TypeError("`loose`, if provided, must be a boolean");
+      }
+      var nonEnumerable = arguments.length > 3 ? arguments[3] : null;
+      var nonWritable = arguments.length > 4 ? arguments[4] : null;
+      var nonConfigurable = arguments.length > 5 ? arguments[5] : null;
+      var loose = arguments.length > 6 ? arguments[6] : false;
+      var desc = !!gopd && gopd(obj, property);
+      if ($defineProperty) {
+        $defineProperty(obj, property, {
+          configurable: nonConfigurable === null && desc ? desc.configurable : !nonConfigurable,
+          enumerable: nonEnumerable === null && desc ? desc.enumerable : !nonEnumerable,
+          value,
+          writable: nonWritable === null && desc ? desc.writable : !nonWritable
+        });
+      } else if (loose || !nonEnumerable && !nonWritable && !nonConfigurable) {
+        obj[property] = value;
+      } else {
+        throw new $SyntaxError("This environment does not support defining a property as non-configurable, non-writable, or non-enumerable.");
+      }
+    };
+    return exports$4;
+  }
+  function dew$3() {
+    if (_dewExec$3) return exports$3;
+    _dewExec$3 = true;
+    var $defineProperty = dew$6();
+    var hasPropertyDescriptors = function hasPropertyDescriptors2() {
+      return !!$defineProperty;
+    };
+    hasPropertyDescriptors.hasArrayLengthDefineBug = function hasArrayLengthDefineBug() {
+      if (!$defineProperty) {
+        return null;
+      }
+      try {
+        return $defineProperty([], "length", {
+          value: 1
+        }).length !== 1;
+      } catch (e) {
+        return true;
+      }
+    };
+    exports$3 = hasPropertyDescriptors;
+    return exports$3;
+  }
+  function dew$22() {
+    if (_dewExec$22) return exports$22;
+    _dewExec$22 = true;
+    var GetIntrinsic = dew$7();
+    var define2 = dew$4();
+    var hasDescriptors = dew$3()();
+    var gOPD = dew$5();
+    var $TypeError = dew$e();
+    var $floor = GetIntrinsic("%Math.floor%");
+    exports$22 = function setFunctionLength(fn, length) {
+      if (typeof fn !== "function") {
+        throw new $TypeError("`fn` is not a function");
+      }
+      if (typeof length !== "number" || length < 0 || length > 4294967295 || $floor(length) !== length) {
+        throw new $TypeError("`length` must be a positive 32-bit integer");
+      }
+      var loose = arguments.length > 2 && !!arguments[2];
+      var functionLengthIsConfigurable = true;
+      var functionLengthIsWritable = true;
+      if ("length" in fn && gOPD) {
+        var desc = gOPD(fn, "length");
+        if (desc && !desc.configurable) {
+          functionLengthIsConfigurable = false;
+        }
+        if (desc && !desc.writable) {
+          functionLengthIsWritable = false;
+        }
+      }
+      if (functionLengthIsConfigurable || functionLengthIsWritable || !loose) {
+        if (hasDescriptors) {
+          define2(
+            /** @type {Parameters<define>[0]} */
+            fn,
+            "length",
+            length,
+            true,
+            true
+          );
+        } else {
+          define2(
+            /** @type {Parameters<define>[0]} */
+            fn,
+            "length",
+            length
+          );
+        }
+      }
+      return fn;
+    };
+    return exports$22;
+  }
+  function dew$12() {
+    if (_dewExec$12) return exports$14;
+    _dewExec$12 = true;
+    var bind = dew$9();
+    var GetIntrinsic = dew$7();
+    var setFunctionLength = dew$22();
+    var $TypeError = dew$e();
+    var $apply = GetIntrinsic("%Function.prototype.apply%");
+    var $call = GetIntrinsic("%Function.prototype.call%");
+    var $reflectApply = GetIntrinsic("%Reflect.apply%", true) || bind.call($call, $apply);
+    var $defineProperty = dew$6();
+    var $max = GetIntrinsic("%Math.max%");
+    exports$14 = function callBind(originalFunction) {
+      if (typeof originalFunction !== "function") {
+        throw new $TypeError("a function is required");
+      }
+      var func = $reflectApply(bind, $call, arguments);
+      return setFunctionLength(func, 1 + $max(0, originalFunction.length - (arguments.length - 1)), true);
+    };
+    var applyBind = function applyBind2() {
+      return $reflectApply(bind, $apply, arguments);
+    };
+    if ($defineProperty) {
+      $defineProperty(exports$14, "apply", {
+        value: applyBind
+      });
+    } else {
+      exports$14.apply = applyBind;
+    }
+    return exports$14;
+  }
+  function dew4() {
+    if (_dewExec4) return exports5;
+    _dewExec4 = true;
+    var GetIntrinsic = dew$7();
+    var callBind = dew$12();
+    var $indexOf = callBind(GetIntrinsic("String.prototype.indexOf"));
+    exports5 = function callBoundIntrinsic(name2, allowMissing) {
+      var intrinsic = GetIntrinsic(name2, !!allowMissing);
+      if (typeof intrinsic === "function" && $indexOf(name2, ".prototype.") > -1) {
+        return callBind(intrinsic);
+      }
+      return intrinsic;
+    };
+    return exports5;
+  }
+  var exports$k, _dewExec$k, exports$j, _dewExec$j, exports$i, _dewExec$i, exports$h, _dewExec$h, exports$g, _dewExec$g, exports$f, _dewExec$f, exports$e, _dewExec$e, exports$d, _dewExec$d, exports$c, _dewExec$c, exports$b, _dewExec$b, exports$a, _dewExec$a, exports$9, _dewExec$9, exports$8, _dewExec$8, exports$7, _dewExec$7, exports$6, _dewExec$6, exports$5, _dewExec$5, exports$4, _dewExec$4, exports$3, _dewExec$3, exports$22, _dewExec$22, exports$14, _dewExec$12, exports5, _dewExec4;
+  var init_chunk_DtcTpLWz = __esm({
+    "node_modules/@jspm/core/nodelibs/browser/chunk-DtcTpLWz.js"() {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      exports$k = {};
+      _dewExec$k = false;
+      exports$j = {};
+      _dewExec$j = false;
+      exports$i = {};
+      _dewExec$i = false;
+      exports$h = {};
+      _dewExec$h = false;
+      exports$g = {};
+      _dewExec$g = false;
+      exports$f = {};
+      _dewExec$f = false;
+      exports$e = {};
+      _dewExec$e = false;
+      exports$d = {};
+      _dewExec$d = false;
+      exports$c = {};
+      _dewExec$c = false;
+      exports$b = {};
+      _dewExec$b = false;
+      exports$a = {};
+      _dewExec$a = false;
+      exports$9 = {};
+      _dewExec$9 = false;
+      exports$8 = {};
+      _dewExec$8 = false;
+      exports$7 = {};
+      _dewExec$7 = false;
+      exports$6 = {};
+      _dewExec$6 = false;
+      exports$5 = {};
+      _dewExec$5 = false;
+      exports$4 = {};
+      _dewExec$4 = false;
+      exports$3 = {};
+      _dewExec$3 = false;
+      exports$22 = {};
+      _dewExec$22 = false;
+      exports$14 = {};
+      _dewExec$12 = false;
+      exports5 = {};
+      _dewExec4 = false;
+    }
+  });
+
+  // node_modules/@jspm/core/nodelibs/browser/chunk-DEMDiNwt.js
+  function unimplemented2(name2) {
+    throw new Error("Node.js process " + name2 + " is not supported by JSPM core outside of Node.js");
+  }
+  function cleanUpNextTick2() {
+    if (!draining2 || !currentQueue2)
+      return;
+    draining2 = false;
+    if (currentQueue2.length) {
+      queue2 = currentQueue2.concat(queue2);
+    } else {
+      queueIndex2 = -1;
+    }
+    if (queue2.length)
+      drainQueue2();
+  }
+  function drainQueue2() {
+    if (draining2)
+      return;
+    var timeout = setTimeout(cleanUpNextTick2, 0);
+    draining2 = true;
+    var len = queue2.length;
+    while (len) {
+      currentQueue2 = queue2;
+      queue2 = [];
+      while (++queueIndex2 < len) {
+        if (currentQueue2)
+          currentQueue2[queueIndex2].run();
+      }
+      queueIndex2 = -1;
+      len = queue2.length;
+    }
+    currentQueue2 = null;
+    draining2 = false;
+    clearTimeout(timeout);
+  }
+  function nextTick2(fun) {
+    var args = new Array(arguments.length - 1);
+    if (arguments.length > 1) {
+      for (var i = 1; i < arguments.length; i++)
+        args[i - 1] = arguments[i];
+    }
+    queue2.push(new Item2(fun, args));
+    if (queue2.length === 1 && !draining2)
+      setTimeout(drainQueue2, 0);
+  }
+  function Item2(fun, array) {
+    this.fun = fun;
+    this.array = array;
+  }
+  function noop2() {
+  }
+  function _linkedBinding2(name2) {
+    unimplemented2("_linkedBinding");
+  }
+  function dlopen2(name2) {
+    unimplemented2("dlopen");
+  }
+  function _getActiveRequests2() {
+    return [];
+  }
+  function _getActiveHandles2() {
+    return [];
+  }
+  function assert2(condition, message) {
+    if (!condition) throw new Error(message || "assertion error");
+  }
+  function hasUncaughtExceptionCaptureCallback2() {
+    return false;
+  }
+  function uptime2() {
+    return _performance2.now() / 1e3;
+  }
+  function hrtime2(previousTimestamp) {
+    var baseNow = Math.floor((Date.now() - _performance2.now()) * 1e-3);
+    var clocktime = _performance2.now() * 1e-3;
+    var seconds = Math.floor(clocktime) + baseNow;
+    var nanoseconds = Math.floor(clocktime % 1 * 1e9);
+    if (previousTimestamp) {
+      seconds = seconds - previousTimestamp[0];
+      nanoseconds = nanoseconds - previousTimestamp[1];
+      if (nanoseconds < 0) {
+        seconds--;
+        nanoseconds += nanoPerSec2;
+      }
+    }
+    return [seconds, nanoseconds];
+  }
+  function on3() {
+    return process2;
+  }
+  function listeners2(name2) {
+    return [];
+  }
+  var queue2, draining2, currentQueue2, queueIndex2, title2, arch2, platform2, env2, argv2, execArgv2, version3, versions2, emitWarning2, binding2, umask2, cwd2, chdir2, release2, _rawDebug2, moduleLoadList2, domain2, _exiting2, config2, reallyExit2, _kill2, cpuUsage2, resourceUsage2, memoryUsage2, kill2, exit2, openStdin2, allowedNodeEnvironmentFlags2, features2, _fatalExceptions2, setUncaughtExceptionCaptureCallback2, _tickCallback2, _debugProcess2, _debugEnd2, _startProfilerIdleNotifier2, _stopProfilerIdleNotifier2, stdout2, stderr2, stdin2, abort2, pid2, ppid2, execPath2, debugPort2, argv02, _preload_modules2, setSourceMapsEnabled2, _performance2, nowOffset, nanoPerSec2, _maxListeners2, _events2, _eventsCount2, addListener2, once3, off2, removeListener2, removeAllListeners2, emit2, prependListener2, prependOnceListener2, process2;
+  var init_chunk_DEMDiNwt = __esm({
+    "node_modules/@jspm/core/nodelibs/browser/chunk-DEMDiNwt.js"() {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      queue2 = [];
+      draining2 = false;
+      queueIndex2 = -1;
+      Item2.prototype.run = function() {
+        this.fun.apply(null, this.array);
+      };
+      title2 = "browser";
+      arch2 = "x64";
+      platform2 = "browser";
+      env2 = {
+        PATH: "/usr/bin",
+        LANG: navigator.language + ".UTF-8",
+        PWD: "/",
+        HOME: "/home",
+        TMP: "/tmp"
+      };
+      argv2 = ["/usr/bin/node"];
+      execArgv2 = [];
+      version3 = "v16.8.0";
+      versions2 = {};
+      emitWarning2 = function(message, type) {
+        console.warn((type ? type + ": " : "") + message);
+      };
+      binding2 = function(name2) {
+        unimplemented2("binding");
+      };
+      umask2 = function(mask) {
+        return 0;
+      };
+      cwd2 = function() {
+        return "/";
+      };
+      chdir2 = function(dir) {
+      };
+      release2 = {
+        name: "node",
+        sourceUrl: "",
+        headersUrl: "",
+        libUrl: ""
+      };
+      _rawDebug2 = noop2;
+      moduleLoadList2 = [];
+      domain2 = {};
+      _exiting2 = false;
+      config2 = {};
+      reallyExit2 = noop2;
+      _kill2 = noop2;
+      cpuUsage2 = function() {
+        return {};
+      };
+      resourceUsage2 = cpuUsage2;
+      memoryUsage2 = cpuUsage2;
+      kill2 = noop2;
+      exit2 = noop2;
+      openStdin2 = noop2;
+      allowedNodeEnvironmentFlags2 = {};
+      features2 = {
+        inspector: false,
+        debug: false,
+        uv: false,
+        ipv6: false,
+        tls_alpn: false,
+        tls_sni: false,
+        tls_ocsp: false,
+        tls: false,
+        cached_builtins: true
+      };
+      _fatalExceptions2 = noop2;
+      setUncaughtExceptionCaptureCallback2 = noop2;
+      _tickCallback2 = noop2;
+      _debugProcess2 = noop2;
+      _debugEnd2 = noop2;
+      _startProfilerIdleNotifier2 = noop2;
+      _stopProfilerIdleNotifier2 = noop2;
+      stdout2 = void 0;
+      stderr2 = void 0;
+      stdin2 = void 0;
+      abort2 = noop2;
+      pid2 = 2;
+      ppid2 = 1;
+      execPath2 = "/bin/usr/node";
+      debugPort2 = 9229;
+      argv02 = "node";
+      _preload_modules2 = [];
+      setSourceMapsEnabled2 = noop2;
+      _performance2 = {
+        now: typeof performance !== "undefined" ? performance.now.bind(performance) : void 0,
+        timing: typeof performance !== "undefined" ? performance.timing : void 0
+      };
+      if (_performance2.now === void 0) {
+        nowOffset = Date.now();
+        if (_performance2.timing && _performance2.timing.navigationStart) {
+          nowOffset = _performance2.timing.navigationStart;
+        }
+        _performance2.now = () => Date.now() - nowOffset;
+      }
+      nanoPerSec2 = 1e9;
+      hrtime2.bigint = function(time) {
+        var diff = hrtime2(time);
+        if (typeof BigInt === "undefined") {
+          return diff[0] * nanoPerSec2 + diff[1];
+        }
+        return BigInt(diff[0] * nanoPerSec2) + BigInt(diff[1]);
+      };
+      _maxListeners2 = 10;
+      _events2 = {};
+      _eventsCount2 = 0;
+      addListener2 = on3;
+      once3 = on3;
+      off2 = on3;
+      removeListener2 = on3;
+      removeAllListeners2 = on3;
+      emit2 = noop2;
+      prependListener2 = on3;
+      prependOnceListener2 = on3;
+      process2 = {
+        version: version3,
+        versions: versions2,
+        arch: arch2,
+        platform: platform2,
+        release: release2,
+        _rawDebug: _rawDebug2,
+        moduleLoadList: moduleLoadList2,
+        binding: binding2,
+        _linkedBinding: _linkedBinding2,
+        _events: _events2,
+        _eventsCount: _eventsCount2,
+        _maxListeners: _maxListeners2,
+        on: on3,
+        addListener: addListener2,
+        once: once3,
+        off: off2,
+        removeListener: removeListener2,
+        removeAllListeners: removeAllListeners2,
+        emit: emit2,
+        prependListener: prependListener2,
+        prependOnceListener: prependOnceListener2,
+        listeners: listeners2,
+        domain: domain2,
+        _exiting: _exiting2,
+        config: config2,
+        dlopen: dlopen2,
+        uptime: uptime2,
+        _getActiveRequests: _getActiveRequests2,
+        _getActiveHandles: _getActiveHandles2,
+        reallyExit: reallyExit2,
+        _kill: _kill2,
+        cpuUsage: cpuUsage2,
+        resourceUsage: resourceUsage2,
+        memoryUsage: memoryUsage2,
+        kill: kill2,
+        exit: exit2,
+        openStdin: openStdin2,
+        allowedNodeEnvironmentFlags: allowedNodeEnvironmentFlags2,
+        assert: assert2,
+        features: features2,
+        _fatalExceptions: _fatalExceptions2,
+        setUncaughtExceptionCaptureCallback: setUncaughtExceptionCaptureCallback2,
+        hasUncaughtExceptionCaptureCallback: hasUncaughtExceptionCaptureCallback2,
+        emitWarning: emitWarning2,
+        nextTick: nextTick2,
+        _tickCallback: _tickCallback2,
+        _debugProcess: _debugProcess2,
+        _debugEnd: _debugEnd2,
+        _startProfilerIdleNotifier: _startProfilerIdleNotifier2,
+        _stopProfilerIdleNotifier: _stopProfilerIdleNotifier2,
+        stdout: stdout2,
+        stdin: stdin2,
+        stderr: stderr2,
+        abort: abort2,
+        umask: umask2,
+        chdir: chdir2,
+        cwd: cwd2,
+        env: env2,
+        title: title2,
+        argv: argv2,
+        execArgv: execArgv2,
+        pid: pid2,
+        ppid: ppid2,
+        execPath: execPath2,
+        debugPort: debugPort2,
+        hrtime: hrtime2,
+        argv0: argv02,
+        _preload_modules: _preload_modules2,
+        setSourceMapsEnabled: setSourceMapsEnabled2
+      };
+    }
+  });
+
+  // node_modules/@jspm/core/nodelibs/browser/chunk-BlJi4mNy.js
+  function dew5() {
+    if (_dewExec5) return exports$15;
+    _dewExec5 = true;
+    var process$1 = process2;
+    function assertPath(path) {
+      if (typeof path !== "string") {
+        throw new TypeError("Path must be a string. Received " + JSON.stringify(path));
+      }
+    }
+    function normalizeStringPosix(path, allowAboveRoot) {
+      var res = "";
+      var lastSegmentLength = 0;
+      var lastSlash = -1;
+      var dots = 0;
+      var code;
+      for (var i = 0; i <= path.length; ++i) {
+        if (i < path.length) code = path.charCodeAt(i);
+        else if (code === 47) break;
+        else code = 47;
+        if (code === 47) {
+          if (lastSlash === i - 1 || dots === 1) ;
+          else if (lastSlash !== i - 1 && dots === 2) {
+            if (res.length < 2 || lastSegmentLength !== 2 || res.charCodeAt(res.length - 1) !== 46 || res.charCodeAt(res.length - 2) !== 46) {
+              if (res.length > 2) {
+                var lastSlashIndex = res.lastIndexOf("/");
+                if (lastSlashIndex !== res.length - 1) {
+                  if (lastSlashIndex === -1) {
+                    res = "";
+                    lastSegmentLength = 0;
+                  } else {
+                    res = res.slice(0, lastSlashIndex);
+                    lastSegmentLength = res.length - 1 - res.lastIndexOf("/");
+                  }
+                  lastSlash = i;
+                  dots = 0;
+                  continue;
+                }
+              } else if (res.length === 2 || res.length === 1) {
+                res = "";
+                lastSegmentLength = 0;
+                lastSlash = i;
+                dots = 0;
+                continue;
+              }
+            }
+            if (allowAboveRoot) {
+              if (res.length > 0) res += "/..";
+              else res = "..";
+              lastSegmentLength = 2;
+            }
+          } else {
+            if (res.length > 0) res += "/" + path.slice(lastSlash + 1, i);
+            else res = path.slice(lastSlash + 1, i);
+            lastSegmentLength = i - lastSlash - 1;
+          }
+          lastSlash = i;
+          dots = 0;
+        } else if (code === 46 && dots !== -1) {
+          ++dots;
+        } else {
+          dots = -1;
+        }
+      }
+      return res;
+    }
+    function _format(sep, pathObject) {
+      var dir = pathObject.dir || pathObject.root;
+      var base = pathObject.base || (pathObject.name || "") + (pathObject.ext || "");
+      if (!dir) {
+        return base;
+      }
+      if (dir === pathObject.root) {
+        return dir + base;
+      }
+      return dir + sep + base;
+    }
+    var posix = {
+      // path.resolve([from ...], to)
+      resolve: function resolve2() {
+        var resolvedPath = "";
+        var resolvedAbsolute = false;
+        var cwd3;
+        for (var i = arguments.length - 1; i >= -1 && !resolvedAbsolute; i--) {
+          var path;
+          if (i >= 0) path = arguments[i];
+          else {
+            if (cwd3 === void 0) cwd3 = process$1.cwd();
+            path = cwd3;
+          }
+          assertPath(path);
+          if (path.length === 0) {
+            continue;
+          }
+          resolvedPath = path + "/" + resolvedPath;
+          resolvedAbsolute = path.charCodeAt(0) === 47;
+        }
+        resolvedPath = normalizeStringPosix(resolvedPath, !resolvedAbsolute);
+        if (resolvedAbsolute) {
+          if (resolvedPath.length > 0) return "/" + resolvedPath;
+          else return "/";
+        } else if (resolvedPath.length > 0) {
+          return resolvedPath;
+        } else {
+          return ".";
+        }
+      },
+      normalize: function normalize(path) {
+        assertPath(path);
+        if (path.length === 0) return ".";
+        var isAbsolute = path.charCodeAt(0) === 47;
+        var trailingSeparator = path.charCodeAt(path.length - 1) === 47;
+        path = normalizeStringPosix(path, !isAbsolute);
+        if (path.length === 0 && !isAbsolute) path = ".";
+        if (path.length > 0 && trailingSeparator) path += "/";
+        if (isAbsolute) return "/" + path;
+        return path;
+      },
+      isAbsolute: function isAbsolute(path) {
+        assertPath(path);
+        return path.length > 0 && path.charCodeAt(0) === 47;
+      },
+      join: function join() {
+        if (arguments.length === 0) return ".";
+        var joined;
+        for (var i = 0; i < arguments.length; ++i) {
+          var arg = arguments[i];
+          assertPath(arg);
+          if (arg.length > 0) {
+            if (joined === void 0) joined = arg;
+            else joined += "/" + arg;
+          }
+        }
+        if (joined === void 0) return ".";
+        return posix.normalize(joined);
+      },
+      relative: function relative(from, to) {
+        assertPath(from);
+        assertPath(to);
+        if (from === to) return "";
+        from = posix.resolve(from);
+        to = posix.resolve(to);
+        if (from === to) return "";
+        var fromStart = 1;
+        for (; fromStart < from.length; ++fromStart) {
+          if (from.charCodeAt(fromStart) !== 47) break;
+        }
+        var fromEnd = from.length;
+        var fromLen = fromEnd - fromStart;
+        var toStart = 1;
+        for (; toStart < to.length; ++toStart) {
+          if (to.charCodeAt(toStart) !== 47) break;
+        }
+        var toEnd = to.length;
+        var toLen = toEnd - toStart;
+        var length = fromLen < toLen ? fromLen : toLen;
+        var lastCommonSep = -1;
+        var i = 0;
+        for (; i <= length; ++i) {
+          if (i === length) {
+            if (toLen > length) {
+              if (to.charCodeAt(toStart + i) === 47) {
+                return to.slice(toStart + i + 1);
+              } else if (i === 0) {
+                return to.slice(toStart + i);
+              }
+            } else if (fromLen > length) {
+              if (from.charCodeAt(fromStart + i) === 47) {
+                lastCommonSep = i;
+              } else if (i === 0) {
+                lastCommonSep = 0;
+              }
+            }
+            break;
+          }
+          var fromCode = from.charCodeAt(fromStart + i);
+          var toCode = to.charCodeAt(toStart + i);
+          if (fromCode !== toCode) break;
+          else if (fromCode === 47) lastCommonSep = i;
+        }
+        var out = "";
+        for (i = fromStart + lastCommonSep + 1; i <= fromEnd; ++i) {
+          if (i === fromEnd || from.charCodeAt(i) === 47) {
+            if (out.length === 0) out += "..";
+            else out += "/..";
+          }
+        }
+        if (out.length > 0) return out + to.slice(toStart + lastCommonSep);
+        else {
+          toStart += lastCommonSep;
+          if (to.charCodeAt(toStart) === 47) ++toStart;
+          return to.slice(toStart);
+        }
+      },
+      _makeLong: function _makeLong(path) {
+        return path;
+      },
+      dirname: function dirname(path) {
+        assertPath(path);
+        if (path.length === 0) return ".";
+        var code = path.charCodeAt(0);
+        var hasRoot = code === 47;
+        var end = -1;
+        var matchedSlash = true;
+        for (var i = path.length - 1; i >= 1; --i) {
+          code = path.charCodeAt(i);
+          if (code === 47) {
+            if (!matchedSlash) {
+              end = i;
+              break;
+            }
+          } else {
+            matchedSlash = false;
+          }
+        }
+        if (end === -1) return hasRoot ? "/" : ".";
+        if (hasRoot && end === 1) return "//";
+        return path.slice(0, end);
+      },
+      basename: function basename(path, ext) {
+        if (ext !== void 0 && typeof ext !== "string") throw new TypeError('"ext" argument must be a string');
+        assertPath(path);
+        var start = 0;
+        var end = -1;
+        var matchedSlash = true;
+        var i;
+        if (ext !== void 0 && ext.length > 0 && ext.length <= path.length) {
+          if (ext.length === path.length && ext === path) return "";
+          var extIdx = ext.length - 1;
+          var firstNonSlashEnd = -1;
+          for (i = path.length - 1; i >= 0; --i) {
+            var code = path.charCodeAt(i);
+            if (code === 47) {
+              if (!matchedSlash) {
+                start = i + 1;
+                break;
+              }
+            } else {
+              if (firstNonSlashEnd === -1) {
+                matchedSlash = false;
+                firstNonSlashEnd = i + 1;
+              }
+              if (extIdx >= 0) {
+                if (code === ext.charCodeAt(extIdx)) {
+                  if (--extIdx === -1) {
+                    end = i;
+                  }
+                } else {
+                  extIdx = -1;
+                  end = firstNonSlashEnd;
+                }
+              }
+            }
+          }
+          if (start === end) end = firstNonSlashEnd;
+          else if (end === -1) end = path.length;
+          return path.slice(start, end);
+        } else {
+          for (i = path.length - 1; i >= 0; --i) {
+            if (path.charCodeAt(i) === 47) {
+              if (!matchedSlash) {
+                start = i + 1;
+                break;
+              }
+            } else if (end === -1) {
+              matchedSlash = false;
+              end = i + 1;
+            }
+          }
+          if (end === -1) return "";
+          return path.slice(start, end);
+        }
+      },
+      extname: function extname(path) {
+        assertPath(path);
+        var startDot = -1;
+        var startPart = 0;
+        var end = -1;
+        var matchedSlash = true;
+        var preDotState = 0;
+        for (var i = path.length - 1; i >= 0; --i) {
+          var code = path.charCodeAt(i);
+          if (code === 47) {
+            if (!matchedSlash) {
+              startPart = i + 1;
+              break;
+            }
+            continue;
+          }
+          if (end === -1) {
+            matchedSlash = false;
+            end = i + 1;
+          }
+          if (code === 46) {
+            if (startDot === -1) startDot = i;
+            else if (preDotState !== 1) preDotState = 1;
+          } else if (startDot !== -1) {
+            preDotState = -1;
+          }
+        }
+        if (startDot === -1 || end === -1 || // We saw a non-dot character immediately before the dot
+        preDotState === 0 || // The (right-most) trimmed path component is exactly '..'
+        preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
+          return "";
+        }
+        return path.slice(startDot, end);
+      },
+      format: function format2(pathObject) {
+        if (pathObject === null || typeof pathObject !== "object") {
+          throw new TypeError('The "pathObject" argument must be of type Object. Received type ' + typeof pathObject);
+        }
+        return _format("/", pathObject);
+      },
+      parse: function parse2(path) {
+        assertPath(path);
+        var ret = {
+          root: "",
+          dir: "",
+          base: "",
+          ext: "",
+          name: ""
+        };
+        if (path.length === 0) return ret;
+        var code = path.charCodeAt(0);
+        var isAbsolute = code === 47;
+        var start;
+        if (isAbsolute) {
+          ret.root = "/";
+          start = 1;
+        } else {
+          start = 0;
+        }
+        var startDot = -1;
+        var startPart = 0;
+        var end = -1;
+        var matchedSlash = true;
+        var i = path.length - 1;
+        var preDotState = 0;
+        for (; i >= start; --i) {
+          code = path.charCodeAt(i);
+          if (code === 47) {
+            if (!matchedSlash) {
+              startPart = i + 1;
+              break;
+            }
+            continue;
+          }
+          if (end === -1) {
+            matchedSlash = false;
+            end = i + 1;
+          }
+          if (code === 46) {
+            if (startDot === -1) startDot = i;
+            else if (preDotState !== 1) preDotState = 1;
+          } else if (startDot !== -1) {
+            preDotState = -1;
+          }
+        }
+        if (startDot === -1 || end === -1 || // We saw a non-dot character immediately before the dot
+        preDotState === 0 || // The (right-most) trimmed path component is exactly '..'
+        preDotState === 1 && startDot === end - 1 && startDot === startPart + 1) {
+          if (end !== -1) {
+            if (startPart === 0 && isAbsolute) ret.base = ret.name = path.slice(1, end);
+            else ret.base = ret.name = path.slice(startPart, end);
+          }
+        } else {
+          if (startPart === 0 && isAbsolute) {
+            ret.name = path.slice(1, startDot);
+            ret.base = path.slice(1, end);
+          } else {
+            ret.name = path.slice(startPart, startDot);
+            ret.base = path.slice(startPart, end);
+          }
+          ret.ext = path.slice(startDot, end);
+        }
+        if (startPart > 0) ret.dir = path.slice(0, startPart - 1);
+        else if (isAbsolute) ret.dir = "/";
+        return ret;
+      },
+      sep: "/",
+      delimiter: ":",
+      win32: null,
+      posix: null
+    };
+    posix.posix = posix;
+    exports$15 = posix;
+    return exports$15;
+  }
+  var exports$15, _dewExec5, exports6;
+  var init_chunk_BlJi4mNy = __esm({
+    "node_modules/@jspm/core/nodelibs/browser/chunk-BlJi4mNy.js"() {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      init_chunk_DEMDiNwt();
+      exports$15 = {};
+      _dewExec5 = false;
+      exports6 = dew5();
+    }
+  });
+
+  // node_modules/@jspm/core/nodelibs/browser/url.js
+  var url_exports = {};
+  __export(url_exports, {
+    URL: () => _URL,
+    Url: () => Url,
+    default: () => exports7,
+    fileURLToPath: () => fileURLToPath,
+    format: () => format,
+    parse: () => parse,
+    pathToFileURL: () => pathToFileURL,
+    resolve: () => resolve,
+    resolveObject: () => resolveObject
+  });
+  function dew$72() {
+    if (_dewExec$72) return exports$82;
+    _dewExec$72 = true;
+    var hasMap = typeof Map === "function" && Map.prototype;
+    var mapSizeDescriptor = Object.getOwnPropertyDescriptor && hasMap ? Object.getOwnPropertyDescriptor(Map.prototype, "size") : null;
+    var mapSize = hasMap && mapSizeDescriptor && typeof mapSizeDescriptor.get === "function" ? mapSizeDescriptor.get : null;
+    var mapForEach = hasMap && Map.prototype.forEach;
+    var hasSet = typeof Set === "function" && Set.prototype;
+    var setSizeDescriptor = Object.getOwnPropertyDescriptor && hasSet ? Object.getOwnPropertyDescriptor(Set.prototype, "size") : null;
+    var setSize = hasSet && setSizeDescriptor && typeof setSizeDescriptor.get === "function" ? setSizeDescriptor.get : null;
+    var setForEach = hasSet && Set.prototype.forEach;
+    var hasWeakMap = typeof WeakMap === "function" && WeakMap.prototype;
+    var weakMapHas = hasWeakMap ? WeakMap.prototype.has : null;
+    var hasWeakSet = typeof WeakSet === "function" && WeakSet.prototype;
+    var weakSetHas = hasWeakSet ? WeakSet.prototype.has : null;
+    var hasWeakRef = typeof WeakRef === "function" && WeakRef.prototype;
+    var weakRefDeref = hasWeakRef ? WeakRef.prototype.deref : null;
+    var booleanValueOf = Boolean.prototype.valueOf;
+    var objectToString = Object.prototype.toString;
+    var functionToString = Function.prototype.toString;
+    var $match = String.prototype.match;
+    var $slice = String.prototype.slice;
+    var $replace = String.prototype.replace;
+    var $toUpperCase = String.prototype.toUpperCase;
+    var $toLowerCase = String.prototype.toLowerCase;
+    var $test = RegExp.prototype.test;
+    var $concat = Array.prototype.concat;
+    var $join = Array.prototype.join;
+    var $arrSlice = Array.prototype.slice;
+    var $floor = Math.floor;
+    var bigIntValueOf = typeof BigInt === "function" ? BigInt.prototype.valueOf : null;
+    var gOPS = Object.getOwnPropertySymbols;
+    var symToString = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? Symbol.prototype.toString : null;
+    var hasShammedSymbols = typeof Symbol === "function" && typeof Symbol.iterator === "object";
+    var toStringTag = typeof Symbol === "function" && Symbol.toStringTag && (typeof Symbol.toStringTag === hasShammedSymbols ? "object" : "symbol") ? Symbol.toStringTag : null;
+    var isEnumerable = Object.prototype.propertyIsEnumerable;
+    var gPO = (typeof Reflect === "function" ? Reflect.getPrototypeOf : Object.getPrototypeOf) || ([].__proto__ === Array.prototype ? function(O) {
+      return O.__proto__;
+    } : null);
+    function addNumericSeparator(num, str) {
+      if (num === Infinity || num === -Infinity || num !== num || num && num > -1e3 && num < 1e3 || $test.call(/e/, str)) {
+        return str;
+      }
+      var sepRegex = /[0-9](?=(?:[0-9]{3})+(?![0-9]))/g;
+      if (typeof num === "number") {
+        var int = num < 0 ? -$floor(-num) : $floor(num);
+        if (int !== num) {
+          var intStr = String(int);
+          var dec = $slice.call(str, intStr.length + 1);
+          return $replace.call(intStr, sepRegex, "$&_") + "." + $replace.call($replace.call(dec, /([0-9]{3})/g, "$&_"), /_$/, "");
+        }
+      }
+      return $replace.call(str, sepRegex, "$&_");
+    }
+    var utilInspect = empty;
+    var inspectCustom = utilInspect.custom;
+    var inspectSymbol = isSymbol(inspectCustom) ? inspectCustom : null;
+    exports$82 = function inspect_(obj, options, depth, seen) {
+      var opts = options || {};
+      if (has(opts, "quoteStyle") && opts.quoteStyle !== "single" && opts.quoteStyle !== "double") {
+        throw new TypeError('option "quoteStyle" must be "single" or "double"');
+      }
+      if (has(opts, "maxStringLength") && (typeof opts.maxStringLength === "number" ? opts.maxStringLength < 0 && opts.maxStringLength !== Infinity : opts.maxStringLength !== null)) {
+        throw new TypeError('option "maxStringLength", if provided, must be a positive integer, Infinity, or `null`');
+      }
+      var customInspect = has(opts, "customInspect") ? opts.customInspect : true;
+      if (typeof customInspect !== "boolean" && customInspect !== "symbol") {
+        throw new TypeError("option \"customInspect\", if provided, must be `true`, `false`, or `'symbol'`");
+      }
+      if (has(opts, "indent") && opts.indent !== null && opts.indent !== "	" && !(parseInt(opts.indent, 10) === opts.indent && opts.indent > 0)) {
+        throw new TypeError('option "indent" must be "\\t", an integer > 0, or `null`');
+      }
+      if (has(opts, "numericSeparator") && typeof opts.numericSeparator !== "boolean") {
+        throw new TypeError('option "numericSeparator", if provided, must be `true` or `false`');
+      }
+      var numericSeparator = opts.numericSeparator;
+      if (typeof obj === "undefined") {
+        return "undefined";
+      }
+      if (obj === null) {
+        return "null";
+      }
+      if (typeof obj === "boolean") {
+        return obj ? "true" : "false";
+      }
+      if (typeof obj === "string") {
+        return inspectString(obj, opts);
+      }
+      if (typeof obj === "number") {
+        if (obj === 0) {
+          return Infinity / obj > 0 ? "0" : "-0";
+        }
+        var str = String(obj);
+        return numericSeparator ? addNumericSeparator(obj, str) : str;
+      }
+      if (typeof obj === "bigint") {
+        var bigIntStr = String(obj) + "n";
+        return numericSeparator ? addNumericSeparator(obj, bigIntStr) : bigIntStr;
+      }
+      var maxDepth = typeof opts.depth === "undefined" ? 5 : opts.depth;
+      if (typeof depth === "undefined") {
+        depth = 0;
+      }
+      if (depth >= maxDepth && maxDepth > 0 && typeof obj === "object") {
+        return isArray(obj) ? "[Array]" : "[Object]";
+      }
+      var indent = getIndent(opts, depth);
+      if (typeof seen === "undefined") {
+        seen = [];
+      } else if (indexOf(seen, obj) >= 0) {
+        return "[Circular]";
+      }
+      function inspect(value, from, noIndent) {
+        if (from) {
+          seen = $arrSlice.call(seen);
+          seen.push(from);
+        }
+        if (noIndent) {
+          var newOpts = {
+            depth: opts.depth
+          };
+          if (has(opts, "quoteStyle")) {
+            newOpts.quoteStyle = opts.quoteStyle;
+          }
+          return inspect_(value, newOpts, depth + 1, seen);
+        }
+        return inspect_(value, opts, depth + 1, seen);
+      }
+      if (typeof obj === "function" && !isRegExp(obj)) {
+        var name2 = nameOf(obj);
+        var keys = arrObjKeys(obj, inspect);
+        return "[Function" + (name2 ? ": " + name2 : " (anonymous)") + "]" + (keys.length > 0 ? " { " + $join.call(keys, ", ") + " }" : "");
+      }
+      if (isSymbol(obj)) {
+        var symString = hasShammedSymbols ? $replace.call(String(obj), /^(Symbol\(.*\))_[^)]*$/, "$1") : symToString.call(obj);
+        return typeof obj === "object" && !hasShammedSymbols ? markBoxed(symString) : symString;
+      }
+      if (isElement(obj)) {
+        var s = "<" + $toLowerCase.call(String(obj.nodeName));
+        var attrs = obj.attributes || [];
+        for (var i = 0; i < attrs.length; i++) {
+          s += " " + attrs[i].name + "=" + wrapQuotes(quote(attrs[i].value), "double", opts);
+        }
+        s += ">";
+        if (obj.childNodes && obj.childNodes.length) {
+          s += "...";
+        }
+        s += "</" + $toLowerCase.call(String(obj.nodeName)) + ">";
+        return s;
+      }
+      if (isArray(obj)) {
+        if (obj.length === 0) {
+          return "[]";
+        }
+        var xs = arrObjKeys(obj, inspect);
+        if (indent && !singleLineValues(xs)) {
+          return "[" + indentedJoin(xs, indent) + "]";
+        }
+        return "[ " + $join.call(xs, ", ") + " ]";
+      }
+      if (isError(obj)) {
+        var parts = arrObjKeys(obj, inspect);
+        if (!("cause" in Error.prototype) && "cause" in obj && !isEnumerable.call(obj, "cause")) {
+          return "{ [" + String(obj) + "] " + $join.call($concat.call("[cause]: " + inspect(obj.cause), parts), ", ") + " }";
+        }
+        if (parts.length === 0) {
+          return "[" + String(obj) + "]";
+        }
+        return "{ [" + String(obj) + "] " + $join.call(parts, ", ") + " }";
+      }
+      if (typeof obj === "object" && customInspect) {
+        if (inspectSymbol && typeof obj[inspectSymbol] === "function" && utilInspect) {
+          return utilInspect(obj, {
+            depth: maxDepth - depth
+          });
+        } else if (customInspect !== "symbol" && typeof obj.inspect === "function") {
+          return obj.inspect();
+        }
+      }
+      if (isMap(obj)) {
+        var mapParts = [];
+        if (mapForEach) {
+          mapForEach.call(obj, function(value, key) {
+            mapParts.push(inspect(key, obj, true) + " => " + inspect(value, obj));
+          });
+        }
+        return collectionOf("Map", mapSize.call(obj), mapParts, indent);
+      }
+      if (isSet(obj)) {
+        var setParts = [];
+        if (setForEach) {
+          setForEach.call(obj, function(value) {
+            setParts.push(inspect(value, obj));
+          });
+        }
+        return collectionOf("Set", setSize.call(obj), setParts, indent);
+      }
+      if (isWeakMap(obj)) {
+        return weakCollectionOf("WeakMap");
+      }
+      if (isWeakSet(obj)) {
+        return weakCollectionOf("WeakSet");
+      }
+      if (isWeakRef(obj)) {
+        return weakCollectionOf("WeakRef");
+      }
+      if (isNumber(obj)) {
+        return markBoxed(inspect(Number(obj)));
+      }
+      if (isBigInt(obj)) {
+        return markBoxed(inspect(bigIntValueOf.call(obj)));
+      }
+      if (isBoolean(obj)) {
+        return markBoxed(booleanValueOf.call(obj));
+      }
+      if (isString(obj)) {
+        return markBoxed(inspect(String(obj)));
+      }
+      if (typeof window !== "undefined" && obj === window) {
+        return "{ [object Window] }";
+      }
+      if (typeof globalThis !== "undefined" && obj === globalThis || typeof _global !== "undefined" && obj === _global) {
+        return "{ [object globalThis] }";
+      }
+      if (!isDate(obj) && !isRegExp(obj)) {
+        var ys = arrObjKeys(obj, inspect);
+        var isPlainObject = gPO ? gPO(obj) === Object.prototype : obj instanceof Object || obj.constructor === Object;
+        var protoTag = obj instanceof Object ? "" : "null prototype";
+        var stringTag = !isPlainObject && toStringTag && Object(obj) === obj && toStringTag in obj ? $slice.call(toStr(obj), 8, -1) : protoTag ? "Object" : "";
+        var constructorTag = isPlainObject || typeof obj.constructor !== "function" ? "" : obj.constructor.name ? obj.constructor.name + " " : "";
+        var tag = constructorTag + (stringTag || protoTag ? "[" + $join.call($concat.call([], stringTag || [], protoTag || []), ": ") + "] " : "");
+        if (ys.length === 0) {
+          return tag + "{}";
+        }
+        if (indent) {
+          return tag + "{" + indentedJoin(ys, indent) + "}";
+        }
+        return tag + "{ " + $join.call(ys, ", ") + " }";
+      }
+      return String(obj);
+    };
+    function wrapQuotes(s, defaultStyle, opts) {
+      var quoteChar = (opts.quoteStyle || defaultStyle) === "double" ? '"' : "'";
+      return quoteChar + s + quoteChar;
+    }
+    function quote(s) {
+      return $replace.call(String(s), /"/g, "&quot;");
+    }
+    function isArray(obj) {
+      return toStr(obj) === "[object Array]" && (!toStringTag || !(typeof obj === "object" && toStringTag in obj));
+    }
+    function isDate(obj) {
+      return toStr(obj) === "[object Date]" && (!toStringTag || !(typeof obj === "object" && toStringTag in obj));
+    }
+    function isRegExp(obj) {
+      return toStr(obj) === "[object RegExp]" && (!toStringTag || !(typeof obj === "object" && toStringTag in obj));
+    }
+    function isError(obj) {
+      return toStr(obj) === "[object Error]" && (!toStringTag || !(typeof obj === "object" && toStringTag in obj));
+    }
+    function isString(obj) {
+      return toStr(obj) === "[object String]" && (!toStringTag || !(typeof obj === "object" && toStringTag in obj));
+    }
+    function isNumber(obj) {
+      return toStr(obj) === "[object Number]" && (!toStringTag || !(typeof obj === "object" && toStringTag in obj));
+    }
+    function isBoolean(obj) {
+      return toStr(obj) === "[object Boolean]" && (!toStringTag || !(typeof obj === "object" && toStringTag in obj));
+    }
+    function isSymbol(obj) {
+      if (hasShammedSymbols) {
+        return obj && typeof obj === "object" && obj instanceof Symbol;
+      }
+      if (typeof obj === "symbol") {
+        return true;
+      }
+      if (!obj || typeof obj !== "object" || !symToString) {
+        return false;
+      }
+      try {
+        symToString.call(obj);
+        return true;
+      } catch (e) {
+      }
+      return false;
+    }
+    function isBigInt(obj) {
+      if (!obj || typeof obj !== "object" || !bigIntValueOf) {
+        return false;
+      }
+      try {
+        bigIntValueOf.call(obj);
+        return true;
+      } catch (e) {
+      }
+      return false;
+    }
+    var hasOwn = Object.prototype.hasOwnProperty || function(key) {
+      return key in (this || _global);
+    };
+    function has(obj, key) {
+      return hasOwn.call(obj, key);
+    }
+    function toStr(obj) {
+      return objectToString.call(obj);
+    }
+    function nameOf(f) {
+      if (f.name) {
+        return f.name;
+      }
+      var m = $match.call(functionToString.call(f), /^function\s*([\w$]+)/);
+      if (m) {
+        return m[1];
+      }
+      return null;
+    }
+    function indexOf(xs, x) {
+      if (xs.indexOf) {
+        return xs.indexOf(x);
+      }
+      for (var i = 0, l = xs.length; i < l; i++) {
+        if (xs[i] === x) {
+          return i;
+        }
+      }
+      return -1;
+    }
+    function isMap(x) {
+      if (!mapSize || !x || typeof x !== "object") {
+        return false;
+      }
+      try {
+        mapSize.call(x);
+        try {
+          setSize.call(x);
+        } catch (s) {
+          return true;
+        }
+        return x instanceof Map;
+      } catch (e) {
+      }
+      return false;
+    }
+    function isWeakMap(x) {
+      if (!weakMapHas || !x || typeof x !== "object") {
+        return false;
+      }
+      try {
+        weakMapHas.call(x, weakMapHas);
+        try {
+          weakSetHas.call(x, weakSetHas);
+        } catch (s) {
+          return true;
+        }
+        return x instanceof WeakMap;
+      } catch (e) {
+      }
+      return false;
+    }
+    function isWeakRef(x) {
+      if (!weakRefDeref || !x || typeof x !== "object") {
+        return false;
+      }
+      try {
+        weakRefDeref.call(x);
+        return true;
+      } catch (e) {
+      }
+      return false;
+    }
+    function isSet(x) {
+      if (!setSize || !x || typeof x !== "object") {
+        return false;
+      }
+      try {
+        setSize.call(x);
+        try {
+          mapSize.call(x);
+        } catch (m) {
+          return true;
+        }
+        return x instanceof Set;
+      } catch (e) {
+      }
+      return false;
+    }
+    function isWeakSet(x) {
+      if (!weakSetHas || !x || typeof x !== "object") {
+        return false;
+      }
+      try {
+        weakSetHas.call(x, weakSetHas);
+        try {
+          weakMapHas.call(x, weakMapHas);
+        } catch (s) {
+          return true;
+        }
+        return x instanceof WeakSet;
+      } catch (e) {
+      }
+      return false;
+    }
+    function isElement(x) {
+      if (!x || typeof x !== "object") {
+        return false;
+      }
+      if (typeof HTMLElement !== "undefined" && x instanceof HTMLElement) {
+        return true;
+      }
+      return typeof x.nodeName === "string" && typeof x.getAttribute === "function";
+    }
+    function inspectString(str, opts) {
+      if (str.length > opts.maxStringLength) {
+        var remaining = str.length - opts.maxStringLength;
+        var trailer = "... " + remaining + " more character" + (remaining > 1 ? "s" : "");
+        return inspectString($slice.call(str, 0, opts.maxStringLength), opts) + trailer;
+      }
+      var s = $replace.call($replace.call(str, /(['\\])/g, "\\$1"), /[\x00-\x1f]/g, lowbyte);
+      return wrapQuotes(s, "single", opts);
+    }
+    function lowbyte(c) {
+      var n = c.charCodeAt(0);
+      var x = {
+        8: "b",
+        9: "t",
+        10: "n",
+        12: "f",
+        13: "r"
+      }[n];
+      if (x) {
+        return "\\" + x;
+      }
+      return "\\x" + (n < 16 ? "0" : "") + $toUpperCase.call(n.toString(16));
+    }
+    function markBoxed(str) {
+      return "Object(" + str + ")";
+    }
+    function weakCollectionOf(type) {
+      return type + " { ? }";
+    }
+    function collectionOf(type, size, entries, indent) {
+      var joinedEntries = indent ? indentedJoin(entries, indent) : $join.call(entries, ", ");
+      return type + " (" + size + ") {" + joinedEntries + "}";
+    }
+    function singleLineValues(xs) {
+      for (var i = 0; i < xs.length; i++) {
+        if (indexOf(xs[i], "\n") >= 0) {
+          return false;
+        }
+      }
+      return true;
+    }
+    function getIndent(opts, depth) {
+      var baseIndent;
+      if (opts.indent === "	") {
+        baseIndent = "	";
+      } else if (typeof opts.indent === "number" && opts.indent > 0) {
+        baseIndent = $join.call(Array(opts.indent + 1), " ");
+      } else {
+        return null;
+      }
+      return {
+        base: baseIndent,
+        prev: $join.call(Array(depth + 1), baseIndent)
+      };
+    }
+    function indentedJoin(xs, indent) {
+      if (xs.length === 0) {
+        return "";
+      }
+      var lineJoiner = "\n" + indent.prev + indent.base;
+      return lineJoiner + $join.call(xs, "," + lineJoiner) + "\n" + indent.prev;
+    }
+    function arrObjKeys(obj, inspect) {
+      var isArr = isArray(obj);
+      var xs = [];
+      if (isArr) {
+        xs.length = obj.length;
+        for (var i = 0; i < obj.length; i++) {
+          xs[i] = has(obj, i) ? inspect(obj[i], obj) : "";
+        }
+      }
+      var syms = typeof gOPS === "function" ? gOPS(obj) : [];
+      var symMap;
+      if (hasShammedSymbols) {
+        symMap = {};
+        for (var k = 0; k < syms.length; k++) {
+          symMap["$" + syms[k]] = syms[k];
+        }
+      }
+      for (var key in obj) {
+        if (!has(obj, key)) {
+          continue;
+        }
+        if (isArr && String(Number(key)) === key && key < obj.length) {
+          continue;
+        }
+        if (hasShammedSymbols && symMap["$" + key] instanceof Symbol) {
+          continue;
+        } else if ($test.call(/[^\w$]/, key)) {
+          xs.push(inspect(key, obj) + ": " + inspect(obj[key], obj));
+        } else {
+          xs.push(key + ": " + inspect(obj[key], obj));
+        }
+      }
+      if (typeof gOPS === "function") {
+        for (var j = 0; j < syms.length; j++) {
+          if (isEnumerable.call(obj, syms[j])) {
+            xs.push("[" + inspect(syms[j]) + "]: " + inspect(obj[syms[j]], obj));
+          }
+        }
+      }
+      return xs;
+    }
+    return exports$82;
+  }
+  function dew$62() {
+    if (_dewExec$62) return exports$72;
+    _dewExec$62 = true;
+    var GetIntrinsic = dew$7();
+    var callBound = dew4();
+    var inspect = dew$72();
+    var $TypeError = dew$e();
+    var $WeakMap = GetIntrinsic("%WeakMap%", true);
+    var $Map = GetIntrinsic("%Map%", true);
+    var $weakMapGet = callBound("WeakMap.prototype.get", true);
+    var $weakMapSet = callBound("WeakMap.prototype.set", true);
+    var $weakMapHas = callBound("WeakMap.prototype.has", true);
+    var $mapGet = callBound("Map.prototype.get", true);
+    var $mapSet = callBound("Map.prototype.set", true);
+    var $mapHas = callBound("Map.prototype.has", true);
+    var listGetNode = function(list, key) {
+      var prev = list;
+      var curr;
+      for (; (curr = prev.next) !== null; prev = curr) {
+        if (curr.key === key) {
+          prev.next = curr.next;
+          curr.next = /** @type {NonNullable<typeof list.next>} */
+          list.next;
+          list.next = curr;
+          return curr;
+        }
+      }
+    };
+    var listGet = function(objects, key) {
+      var node = listGetNode(objects, key);
+      return node && node.value;
+    };
+    var listSet = function(objects, key, value) {
+      var node = listGetNode(objects, key);
+      if (node) {
+        node.value = value;
+      } else {
+        objects.next = /** @type {import('.').ListNode<typeof value>} */
+        {
+          // eslint-disable-line no-param-reassign, no-extra-parens
+          key,
+          next: objects.next,
+          value
+        };
+      }
+    };
+    var listHas = function(objects, key) {
+      return !!listGetNode(objects, key);
+    };
+    exports$72 = function getSideChannel() {
+      var $wm;
+      var $m;
+      var $o;
+      var channel = {
+        assert: function(key) {
+          if (!channel.has(key)) {
+            throw new $TypeError("Side channel does not contain " + inspect(key));
+          }
+        },
+        get: function(key) {
+          if ($WeakMap && key && (typeof key === "object" || typeof key === "function")) {
+            if ($wm) {
+              return $weakMapGet($wm, key);
+            }
+          } else if ($Map) {
+            if ($m) {
+              return $mapGet($m, key);
+            }
+          } else {
+            if ($o) {
+              return listGet($o, key);
+            }
+          }
+        },
+        has: function(key) {
+          if ($WeakMap && key && (typeof key === "object" || typeof key === "function")) {
+            if ($wm) {
+              return $weakMapHas($wm, key);
+            }
+          } else if ($Map) {
+            if ($m) {
+              return $mapHas($m, key);
+            }
+          } else {
+            if ($o) {
+              return listHas($o, key);
+            }
+          }
+          return false;
+        },
+        set: function(key, value) {
+          if ($WeakMap && key && (typeof key === "object" || typeof key === "function")) {
+            if (!$wm) {
+              $wm = new $WeakMap();
+            }
+            $weakMapSet($wm, key, value);
+          } else if ($Map) {
+            if (!$m) {
+              $m = new $Map();
+            }
+            $mapSet($m, key, value);
+          } else {
+            if (!$o) {
+              $o = {
+                key: {},
+                next: null
+              };
+            }
+            listSet($o, key, value);
+          }
+        }
+      };
+      return channel;
+    };
+    return exports$72;
+  }
+  function dew$52() {
+    if (_dewExec$52) return exports$62;
+    _dewExec$52 = true;
+    var replace = String.prototype.replace;
+    var percentTwenties = /%20/g;
+    var Format = {
+      RFC1738: "RFC1738",
+      RFC3986: "RFC3986"
+    };
+    exports$62 = {
+      "default": Format.RFC3986,
+      formatters: {
+        RFC1738: function(value) {
+          return replace.call(value, percentTwenties, "+");
+        },
+        RFC3986: function(value) {
+          return String(value);
+        }
+      },
+      RFC1738: Format.RFC1738,
+      RFC3986: Format.RFC3986
+    };
+    return exports$62;
+  }
+  function dew$42() {
+    if (_dewExec$42) return exports$52;
+    _dewExec$42 = true;
+    var formats = dew$52();
+    var has = Object.prototype.hasOwnProperty;
+    var isArray = Array.isArray;
+    var hexTable = (function() {
+      var array = [];
+      for (var i = 0; i < 256; ++i) {
+        array.push("%" + ((i < 16 ? "0" : "") + i.toString(16)).toUpperCase());
+      }
+      return array;
+    })();
+    var compactQueue = function compactQueue2(queue3) {
+      while (queue3.length > 1) {
+        var item = queue3.pop();
+        var obj = item.obj[item.prop];
+        if (isArray(obj)) {
+          var compacted = [];
+          for (var j = 0; j < obj.length; ++j) {
+            if (typeof obj[j] !== "undefined") {
+              compacted.push(obj[j]);
+            }
+          }
+          item.obj[item.prop] = compacted;
+        }
+      }
+    };
+    var arrayToObject = function arrayToObject2(source, options) {
+      var obj = options && options.plainObjects ? /* @__PURE__ */ Object.create(null) : {};
+      for (var i = 0; i < source.length; ++i) {
+        if (typeof source[i] !== "undefined") {
+          obj[i] = source[i];
+        }
+      }
+      return obj;
+    };
+    var merge = function merge2(target, source, options) {
+      if (!source) {
+        return target;
+      }
+      if (typeof source !== "object") {
+        if (isArray(target)) {
+          target.push(source);
+        } else if (target && typeof target === "object") {
+          if (options && (options.plainObjects || options.allowPrototypes) || !has.call(Object.prototype, source)) {
+            target[source] = true;
+          }
+        } else {
+          return [target, source];
+        }
+        return target;
+      }
+      if (!target || typeof target !== "object") {
+        return [target].concat(source);
+      }
+      var mergeTarget = target;
+      if (isArray(target) && !isArray(source)) {
+        mergeTarget = arrayToObject(target, options);
+      }
+      if (isArray(target) && isArray(source)) {
+        source.forEach(function(item, i) {
+          if (has.call(target, i)) {
+            var targetItem = target[i];
+            if (targetItem && typeof targetItem === "object" && item && typeof item === "object") {
+              target[i] = merge2(targetItem, item, options);
+            } else {
+              target.push(item);
+            }
+          } else {
+            target[i] = item;
+          }
+        });
+        return target;
+      }
+      return Object.keys(source).reduce(function(acc, key) {
+        var value = source[key];
+        if (has.call(acc, key)) {
+          acc[key] = merge2(acc[key], value, options);
+        } else {
+          acc[key] = value;
+        }
+        return acc;
+      }, mergeTarget);
+    };
+    var assign = function assignSingleSource(target, source) {
+      return Object.keys(source).reduce(function(acc, key) {
+        acc[key] = source[key];
+        return acc;
+      }, target);
+    };
+    var decode2 = function(str, decoder, charset) {
+      var strWithoutPlus = str.replace(/\+/g, " ");
+      if (charset === "iso-8859-1") {
+        return strWithoutPlus.replace(/%[0-9a-f]{2}/gi, unescape);
+      }
+      try {
+        return decodeURIComponent(strWithoutPlus);
+      } catch (e) {
+        return strWithoutPlus;
+      }
+    };
+    var limit = 1024;
+    var encode2 = function encode3(str, defaultEncoder, charset, kind, format2) {
+      if (str.length === 0) {
+        return str;
+      }
+      var string = str;
+      if (typeof str === "symbol") {
+        string = Symbol.prototype.toString.call(str);
+      } else if (typeof str !== "string") {
+        string = String(str);
+      }
+      if (charset === "iso-8859-1") {
+        return escape(string).replace(/%u[0-9a-f]{4}/gi, function($0) {
+          return "%26%23" + parseInt($0.slice(2), 16) + "%3B";
+        });
+      }
+      var out = "";
+      for (var j = 0; j < string.length; j += limit) {
+        var segment = string.length >= limit ? string.slice(j, j + limit) : string;
+        var arr = [];
+        for (var i = 0; i < segment.length; ++i) {
+          var c = segment.charCodeAt(i);
+          if (c === 45 || c === 46 || c === 95 || c === 126 || c >= 48 && c <= 57 || c >= 65 && c <= 90 || c >= 97 && c <= 122 || format2 === formats.RFC1738 && (c === 40 || c === 41)) {
+            arr[arr.length] = segment.charAt(i);
+            continue;
+          }
+          if (c < 128) {
+            arr[arr.length] = hexTable[c];
+            continue;
+          }
+          if (c < 2048) {
+            arr[arr.length] = hexTable[192 | c >> 6] + hexTable[128 | c & 63];
+            continue;
+          }
+          if (c < 55296 || c >= 57344) {
+            arr[arr.length] = hexTable[224 | c >> 12] + hexTable[128 | c >> 6 & 63] + hexTable[128 | c & 63];
+            continue;
+          }
+          i += 1;
+          c = 65536 + ((c & 1023) << 10 | segment.charCodeAt(i) & 1023);
+          arr[arr.length] = hexTable[240 | c >> 18] + hexTable[128 | c >> 12 & 63] + hexTable[128 | c >> 6 & 63] + hexTable[128 | c & 63];
+        }
+        out += arr.join("");
+      }
+      return out;
+    };
+    var compact = function compact2(value) {
+      var queue3 = [{
+        obj: {
+          o: value
+        },
+        prop: "o"
+      }];
+      var refs = [];
+      for (var i = 0; i < queue3.length; ++i) {
+        var item = queue3[i];
+        var obj = item.obj[item.prop];
+        var keys = Object.keys(obj);
+        for (var j = 0; j < keys.length; ++j) {
+          var key = keys[j];
+          var val = obj[key];
+          if (typeof val === "object" && val !== null && refs.indexOf(val) === -1) {
+            queue3.push({
+              obj,
+              prop: key
+            });
+            refs.push(val);
+          }
+        }
+      }
+      compactQueue(queue3);
+      return value;
+    };
+    var isRegExp = function isRegExp2(obj) {
+      return Object.prototype.toString.call(obj) === "[object RegExp]";
+    };
+    var isBuffer = function isBuffer2(obj) {
+      if (!obj || typeof obj !== "object") {
+        return false;
+      }
+      return !!(obj.constructor && obj.constructor.isBuffer && obj.constructor.isBuffer(obj));
+    };
+    var combine = function combine2(a, b) {
+      return [].concat(a, b);
+    };
+    var maybeMap = function maybeMap2(val, fn) {
+      if (isArray(val)) {
+        var mapped = [];
+        for (var i = 0; i < val.length; i += 1) {
+          mapped.push(fn(val[i]));
+        }
+        return mapped;
+      }
+      return fn(val);
+    };
+    exports$52 = {
+      arrayToObject,
+      assign,
+      combine,
+      compact,
+      decode: decode2,
+      encode: encode2,
+      isBuffer,
+      isRegExp,
+      maybeMap,
+      merge
+    };
+    return exports$52;
+  }
+  function dew$32() {
+    if (_dewExec$32) return exports$42;
+    _dewExec$32 = true;
+    var getSideChannel = dew$62();
+    var utils = dew$42();
+    var formats = dew$52();
+    var has = Object.prototype.hasOwnProperty;
+    var arrayPrefixGenerators = {
+      brackets: function brackets(prefix) {
+        return prefix + "[]";
+      },
+      comma: "comma",
+      indices: function indices(prefix, key) {
+        return prefix + "[" + key + "]";
+      },
+      repeat: function repeat(prefix) {
+        return prefix;
+      }
+    };
+    var isArray = Array.isArray;
+    var push = Array.prototype.push;
+    var pushToArray = function(arr, valueOrArray) {
+      push.apply(arr, isArray(valueOrArray) ? valueOrArray : [valueOrArray]);
+    };
+    var toISO = Date.prototype.toISOString;
+    var defaultFormat = formats["default"];
+    var defaults = {
+      addQueryPrefix: false,
+      allowDots: false,
+      allowEmptyArrays: false,
+      arrayFormat: "indices",
+      charset: "utf-8",
+      charsetSentinel: false,
+      delimiter: "&",
+      encode: true,
+      encodeDotInKeys: false,
+      encoder: utils.encode,
+      encodeValuesOnly: false,
+      format: defaultFormat,
+      formatter: formats.formatters[defaultFormat],
+      // deprecated
+      indices: false,
+      serializeDate: function serializeDate(date) {
+        return toISO.call(date);
+      },
+      skipNulls: false,
+      strictNullHandling: false
+    };
+    var isNonNullishPrimitive = function isNonNullishPrimitive2(v) {
+      return typeof v === "string" || typeof v === "number" || typeof v === "boolean" || typeof v === "symbol" || typeof v === "bigint";
+    };
+    var sentinel = {};
+    var stringify = function stringify2(object, prefix, generateArrayPrefix, commaRoundTrip, allowEmptyArrays, strictNullHandling, skipNulls, encodeDotInKeys, encoder, filter, sort, allowDots, serializeDate, format2, formatter, encodeValuesOnly, charset, sideChannel) {
+      var obj = object;
+      var tmpSc = sideChannel;
+      var step = 0;
+      var findFlag = false;
+      while ((tmpSc = tmpSc.get(sentinel)) !== void 0 && !findFlag) {
+        var pos = tmpSc.get(object);
+        step += 1;
+        if (typeof pos !== "undefined") {
+          if (pos === step) {
+            throw new RangeError("Cyclic object value");
+          } else {
+            findFlag = true;
+          }
+        }
+        if (typeof tmpSc.get(sentinel) === "undefined") {
+          step = 0;
+        }
+      }
+      if (typeof filter === "function") {
+        obj = filter(prefix, obj);
+      } else if (obj instanceof Date) {
+        obj = serializeDate(obj);
+      } else if (generateArrayPrefix === "comma" && isArray(obj)) {
+        obj = utils.maybeMap(obj, function(value2) {
+          if (value2 instanceof Date) {
+            return serializeDate(value2);
+          }
+          return value2;
+        });
+      }
+      if (obj === null) {
+        if (strictNullHandling) {
+          return encoder && !encodeValuesOnly ? encoder(prefix, defaults.encoder, charset, "key", format2) : prefix;
+        }
+        obj = "";
+      }
+      if (isNonNullishPrimitive(obj) || utils.isBuffer(obj)) {
+        if (encoder) {
+          var keyValue = encodeValuesOnly ? prefix : encoder(prefix, defaults.encoder, charset, "key", format2);
+          return [formatter(keyValue) + "=" + formatter(encoder(obj, defaults.encoder, charset, "value", format2))];
+        }
+        return [formatter(prefix) + "=" + formatter(String(obj))];
+      }
+      var values = [];
+      if (typeof obj === "undefined") {
+        return values;
+      }
+      var objKeys;
+      if (generateArrayPrefix === "comma" && isArray(obj)) {
+        if (encodeValuesOnly && encoder) {
+          obj = utils.maybeMap(obj, encoder);
+        }
+        objKeys = [{
+          value: obj.length > 0 ? obj.join(",") || null : void 0
+        }];
+      } else if (isArray(filter)) {
+        objKeys = filter;
+      } else {
+        var keys = Object.keys(obj);
+        objKeys = sort ? keys.sort(sort) : keys;
+      }
+      var encodedPrefix = encodeDotInKeys ? prefix.replace(/\./g, "%2E") : prefix;
+      var adjustedPrefix = commaRoundTrip && isArray(obj) && obj.length === 1 ? encodedPrefix + "[]" : encodedPrefix;
+      if (allowEmptyArrays && isArray(obj) && obj.length === 0) {
+        return adjustedPrefix + "[]";
+      }
+      for (var j = 0; j < objKeys.length; ++j) {
+        var key = objKeys[j];
+        var value = typeof key === "object" && typeof key.value !== "undefined" ? key.value : obj[key];
+        if (skipNulls && value === null) {
+          continue;
+        }
+        var encodedKey = allowDots && encodeDotInKeys ? key.replace(/\./g, "%2E") : key;
+        var keyPrefix = isArray(obj) ? typeof generateArrayPrefix === "function" ? generateArrayPrefix(adjustedPrefix, encodedKey) : adjustedPrefix : adjustedPrefix + (allowDots ? "." + encodedKey : "[" + encodedKey + "]");
+        sideChannel.set(object, step);
+        var valueSideChannel = getSideChannel();
+        valueSideChannel.set(sentinel, sideChannel);
+        pushToArray(values, stringify2(value, keyPrefix, generateArrayPrefix, commaRoundTrip, allowEmptyArrays, strictNullHandling, skipNulls, encodeDotInKeys, generateArrayPrefix === "comma" && encodeValuesOnly && isArray(obj) ? null : encoder, filter, sort, allowDots, serializeDate, format2, formatter, encodeValuesOnly, charset, valueSideChannel));
+      }
+      return values;
+    };
+    var normalizeStringifyOptions = function normalizeStringifyOptions2(opts) {
+      if (!opts) {
+        return defaults;
+      }
+      if (typeof opts.allowEmptyArrays !== "undefined" && typeof opts.allowEmptyArrays !== "boolean") {
+        throw new TypeError("`allowEmptyArrays` option can only be `true` or `false`, when provided");
+      }
+      if (typeof opts.encodeDotInKeys !== "undefined" && typeof opts.encodeDotInKeys !== "boolean") {
+        throw new TypeError("`encodeDotInKeys` option can only be `true` or `false`, when provided");
+      }
+      if (opts.encoder !== null && typeof opts.encoder !== "undefined" && typeof opts.encoder !== "function") {
+        throw new TypeError("Encoder has to be a function.");
+      }
+      var charset = opts.charset || defaults.charset;
+      if (typeof opts.charset !== "undefined" && opts.charset !== "utf-8" && opts.charset !== "iso-8859-1") {
+        throw new TypeError("The charset option must be either utf-8, iso-8859-1, or undefined");
+      }
+      var format2 = formats["default"];
+      if (typeof opts.format !== "undefined") {
+        if (!has.call(formats.formatters, opts.format)) {
+          throw new TypeError("Unknown format option provided.");
+        }
+        format2 = opts.format;
+      }
+      var formatter = formats.formatters[format2];
+      var filter = defaults.filter;
+      if (typeof opts.filter === "function" || isArray(opts.filter)) {
+        filter = opts.filter;
+      }
+      var arrayFormat;
+      if (opts.arrayFormat in arrayPrefixGenerators) {
+        arrayFormat = opts.arrayFormat;
+      } else if ("indices" in opts) {
+        arrayFormat = opts.indices ? "indices" : "repeat";
+      } else {
+        arrayFormat = defaults.arrayFormat;
+      }
+      if ("commaRoundTrip" in opts && typeof opts.commaRoundTrip !== "boolean") {
+        throw new TypeError("`commaRoundTrip` must be a boolean, or absent");
+      }
+      var allowDots = typeof opts.allowDots === "undefined" ? opts.encodeDotInKeys === true ? true : defaults.allowDots : !!opts.allowDots;
+      return {
+        addQueryPrefix: typeof opts.addQueryPrefix === "boolean" ? opts.addQueryPrefix : defaults.addQueryPrefix,
+        allowDots,
+        allowEmptyArrays: typeof opts.allowEmptyArrays === "boolean" ? !!opts.allowEmptyArrays : defaults.allowEmptyArrays,
+        arrayFormat,
+        charset,
+        charsetSentinel: typeof opts.charsetSentinel === "boolean" ? opts.charsetSentinel : defaults.charsetSentinel,
+        commaRoundTrip: opts.commaRoundTrip,
+        delimiter: typeof opts.delimiter === "undefined" ? defaults.delimiter : opts.delimiter,
+        encode: typeof opts.encode === "boolean" ? opts.encode : defaults.encode,
+        encodeDotInKeys: typeof opts.encodeDotInKeys === "boolean" ? opts.encodeDotInKeys : defaults.encodeDotInKeys,
+        encoder: typeof opts.encoder === "function" ? opts.encoder : defaults.encoder,
+        encodeValuesOnly: typeof opts.encodeValuesOnly === "boolean" ? opts.encodeValuesOnly : defaults.encodeValuesOnly,
+        filter,
+        format: format2,
+        formatter,
+        serializeDate: typeof opts.serializeDate === "function" ? opts.serializeDate : defaults.serializeDate,
+        skipNulls: typeof opts.skipNulls === "boolean" ? opts.skipNulls : defaults.skipNulls,
+        sort: typeof opts.sort === "function" ? opts.sort : null,
+        strictNullHandling: typeof opts.strictNullHandling === "boolean" ? opts.strictNullHandling : defaults.strictNullHandling
+      };
+    };
+    exports$42 = function(object, opts) {
+      var obj = object;
+      var options = normalizeStringifyOptions(opts);
+      var objKeys;
+      var filter;
+      if (typeof options.filter === "function") {
+        filter = options.filter;
+        obj = filter("", obj);
+      } else if (isArray(options.filter)) {
+        filter = options.filter;
+        objKeys = filter;
+      }
+      var keys = [];
+      if (typeof obj !== "object" || obj === null) {
+        return "";
+      }
+      var generateArrayPrefix = arrayPrefixGenerators[options.arrayFormat];
+      var commaRoundTrip = generateArrayPrefix === "comma" && options.commaRoundTrip;
+      if (!objKeys) {
+        objKeys = Object.keys(obj);
+      }
+      if (options.sort) {
+        objKeys.sort(options.sort);
+      }
+      var sideChannel = getSideChannel();
+      for (var i = 0; i < objKeys.length; ++i) {
+        var key = objKeys[i];
+        if (options.skipNulls && obj[key] === null) {
+          continue;
+        }
+        pushToArray(keys, stringify(obj[key], key, generateArrayPrefix, commaRoundTrip, options.allowEmptyArrays, options.strictNullHandling, options.skipNulls, options.encodeDotInKeys, options.encode ? options.encoder : null, options.filter, options.sort, options.allowDots, options.serializeDate, options.format, options.formatter, options.encodeValuesOnly, options.charset, sideChannel));
+      }
+      var joined = keys.join(options.delimiter);
+      var prefix = options.addQueryPrefix === true ? "?" : "";
+      if (options.charsetSentinel) {
+        if (options.charset === "iso-8859-1") {
+          prefix += "utf8=%26%2310003%3B&";
+        } else {
+          prefix += "utf8=%E2%9C%93&";
+        }
+      }
+      return joined.length > 0 ? prefix + joined : "";
+    };
+    return exports$42;
+  }
+  function dew$23() {
+    if (_dewExec$23) return exports$32;
+    _dewExec$23 = true;
+    var utils = dew$42();
+    var has = Object.prototype.hasOwnProperty;
+    var isArray = Array.isArray;
+    var defaults = {
+      allowDots: false,
+      allowEmptyArrays: false,
+      allowPrototypes: false,
+      allowSparse: false,
+      arrayLimit: 20,
+      charset: "utf-8",
+      charsetSentinel: false,
+      comma: false,
+      decodeDotInKeys: false,
+      decoder: utils.decode,
+      delimiter: "&",
+      depth: 5,
+      duplicates: "combine",
+      ignoreQueryPrefix: false,
+      interpretNumericEntities: false,
+      parameterLimit: 1e3,
+      parseArrays: true,
+      plainObjects: false,
+      strictDepth: false,
+      strictNullHandling: false
+    };
+    var interpretNumericEntities = function(str) {
+      return str.replace(/&#(\d+);/g, function($0, numberStr) {
+        return String.fromCharCode(parseInt(numberStr, 10));
+      });
+    };
+    var parseArrayValue = function(val, options) {
+      if (val && typeof val === "string" && options.comma && val.indexOf(",") > -1) {
+        return val.split(",");
+      }
+      return val;
+    };
+    var isoSentinel = "utf8=%26%2310003%3B";
+    var charsetSentinel = "utf8=%E2%9C%93";
+    var parseValues = function parseQueryStringValues(str, options) {
+      var obj = {
+        __proto__: null
+      };
+      var cleanStr = options.ignoreQueryPrefix ? str.replace(/^\?/, "") : str;
+      cleanStr = cleanStr.replace(/%5B/gi, "[").replace(/%5D/gi, "]");
+      var limit = options.parameterLimit === Infinity ? void 0 : options.parameterLimit;
+      var parts = cleanStr.split(options.delimiter, limit);
+      var skipIndex = -1;
+      var i;
+      var charset = options.charset;
+      if (options.charsetSentinel) {
+        for (i = 0; i < parts.length; ++i) {
+          if (parts[i].indexOf("utf8=") === 0) {
+            if (parts[i] === charsetSentinel) {
+              charset = "utf-8";
+            } else if (parts[i] === isoSentinel) {
+              charset = "iso-8859-1";
+            }
+            skipIndex = i;
+            i = parts.length;
+          }
+        }
+      }
+      for (i = 0; i < parts.length; ++i) {
+        if (i === skipIndex) {
+          continue;
+        }
+        var part = parts[i];
+        var bracketEqualsPos = part.indexOf("]=");
+        var pos = bracketEqualsPos === -1 ? part.indexOf("=") : bracketEqualsPos + 1;
+        var key, val;
+        if (pos === -1) {
+          key = options.decoder(part, defaults.decoder, charset, "key");
+          val = options.strictNullHandling ? null : "";
+        } else {
+          key = options.decoder(part.slice(0, pos), defaults.decoder, charset, "key");
+          val = utils.maybeMap(parseArrayValue(part.slice(pos + 1), options), function(encodedVal) {
+            return options.decoder(encodedVal, defaults.decoder, charset, "value");
+          });
+        }
+        if (val && options.interpretNumericEntities && charset === "iso-8859-1") {
+          val = interpretNumericEntities(val);
+        }
+        if (part.indexOf("[]=") > -1) {
+          val = isArray(val) ? [val] : val;
+        }
+        var existing = has.call(obj, key);
+        if (existing && options.duplicates === "combine") {
+          obj[key] = utils.combine(obj[key], val);
+        } else if (!existing || options.duplicates === "last") {
+          obj[key] = val;
+        }
+      }
+      return obj;
+    };
+    var parseObject = function(chain, val, options, valuesParsed) {
+      var leaf = valuesParsed ? val : parseArrayValue(val, options);
+      for (var i = chain.length - 1; i >= 0; --i) {
+        var obj;
+        var root = chain[i];
+        if (root === "[]" && options.parseArrays) {
+          obj = options.allowEmptyArrays && (leaf === "" || options.strictNullHandling && leaf === null) ? [] : [].concat(leaf);
+        } else {
+          obj = options.plainObjects ? /* @__PURE__ */ Object.create(null) : {};
+          var cleanRoot = root.charAt(0) === "[" && root.charAt(root.length - 1) === "]" ? root.slice(1, -1) : root;
+          var decodedRoot = options.decodeDotInKeys ? cleanRoot.replace(/%2E/g, ".") : cleanRoot;
+          var index = parseInt(decodedRoot, 10);
+          if (!options.parseArrays && decodedRoot === "") {
+            obj = {
+              0: leaf
+            };
+          } else if (!isNaN(index) && root !== decodedRoot && String(index) === decodedRoot && index >= 0 && options.parseArrays && index <= options.arrayLimit) {
+            obj = [];
+            obj[index] = leaf;
+          } else if (decodedRoot !== "__proto__") {
+            obj[decodedRoot] = leaf;
+          }
+        }
+        leaf = obj;
+      }
+      return leaf;
+    };
+    var parseKeys = function parseQueryStringKeys(givenKey, val, options, valuesParsed) {
+      if (!givenKey) {
+        return;
+      }
+      var key = options.allowDots ? givenKey.replace(/\.([^.[]+)/g, "[$1]") : givenKey;
+      var brackets = /(\[[^[\]]*])/;
+      var child = /(\[[^[\]]*])/g;
+      var segment = options.depth > 0 && brackets.exec(key);
+      var parent = segment ? key.slice(0, segment.index) : key;
+      var keys = [];
+      if (parent) {
+        if (!options.plainObjects && has.call(Object.prototype, parent)) {
+          if (!options.allowPrototypes) {
+            return;
+          }
+        }
+        keys.push(parent);
+      }
+      var i = 0;
+      while (options.depth > 0 && (segment = child.exec(key)) !== null && i < options.depth) {
+        i += 1;
+        if (!options.plainObjects && has.call(Object.prototype, segment[1].slice(1, -1))) {
+          if (!options.allowPrototypes) {
+            return;
+          }
+        }
+        keys.push(segment[1]);
+      }
+      if (segment) {
+        if (options.strictDepth === true) {
+          throw new RangeError("Input depth exceeded depth option of " + options.depth + " and strictDepth is true");
+        }
+        keys.push("[" + key.slice(segment.index) + "]");
+      }
+      return parseObject(keys, val, options, valuesParsed);
+    };
+    var normalizeParseOptions = function normalizeParseOptions2(opts) {
+      if (!opts) {
+        return defaults;
+      }
+      if (typeof opts.allowEmptyArrays !== "undefined" && typeof opts.allowEmptyArrays !== "boolean") {
+        throw new TypeError("`allowEmptyArrays` option can only be `true` or `false`, when provided");
+      }
+      if (typeof opts.decodeDotInKeys !== "undefined" && typeof opts.decodeDotInKeys !== "boolean") {
+        throw new TypeError("`decodeDotInKeys` option can only be `true` or `false`, when provided");
+      }
+      if (opts.decoder !== null && typeof opts.decoder !== "undefined" && typeof opts.decoder !== "function") {
+        throw new TypeError("Decoder has to be a function.");
+      }
+      if (typeof opts.charset !== "undefined" && opts.charset !== "utf-8" && opts.charset !== "iso-8859-1") {
+        throw new TypeError("The charset option must be either utf-8, iso-8859-1, or undefined");
+      }
+      var charset = typeof opts.charset === "undefined" ? defaults.charset : opts.charset;
+      var duplicates = typeof opts.duplicates === "undefined" ? defaults.duplicates : opts.duplicates;
+      if (duplicates !== "combine" && duplicates !== "first" && duplicates !== "last") {
+        throw new TypeError("The duplicates option must be either combine, first, or last");
+      }
+      var allowDots = typeof opts.allowDots === "undefined" ? opts.decodeDotInKeys === true ? true : defaults.allowDots : !!opts.allowDots;
+      return {
+        allowDots,
+        allowEmptyArrays: typeof opts.allowEmptyArrays === "boolean" ? !!opts.allowEmptyArrays : defaults.allowEmptyArrays,
+        allowPrototypes: typeof opts.allowPrototypes === "boolean" ? opts.allowPrototypes : defaults.allowPrototypes,
+        allowSparse: typeof opts.allowSparse === "boolean" ? opts.allowSparse : defaults.allowSparse,
+        arrayLimit: typeof opts.arrayLimit === "number" ? opts.arrayLimit : defaults.arrayLimit,
+        charset,
+        charsetSentinel: typeof opts.charsetSentinel === "boolean" ? opts.charsetSentinel : defaults.charsetSentinel,
+        comma: typeof opts.comma === "boolean" ? opts.comma : defaults.comma,
+        decodeDotInKeys: typeof opts.decodeDotInKeys === "boolean" ? opts.decodeDotInKeys : defaults.decodeDotInKeys,
+        decoder: typeof opts.decoder === "function" ? opts.decoder : defaults.decoder,
+        delimiter: typeof opts.delimiter === "string" || utils.isRegExp(opts.delimiter) ? opts.delimiter : defaults.delimiter,
+        // eslint-disable-next-line no-implicit-coercion, no-extra-parens
+        depth: typeof opts.depth === "number" || opts.depth === false ? +opts.depth : defaults.depth,
+        duplicates,
+        ignoreQueryPrefix: opts.ignoreQueryPrefix === true,
+        interpretNumericEntities: typeof opts.interpretNumericEntities === "boolean" ? opts.interpretNumericEntities : defaults.interpretNumericEntities,
+        parameterLimit: typeof opts.parameterLimit === "number" ? opts.parameterLimit : defaults.parameterLimit,
+        parseArrays: opts.parseArrays !== false,
+        plainObjects: typeof opts.plainObjects === "boolean" ? opts.plainObjects : defaults.plainObjects,
+        strictDepth: typeof opts.strictDepth === "boolean" ? !!opts.strictDepth : defaults.strictDepth,
+        strictNullHandling: typeof opts.strictNullHandling === "boolean" ? opts.strictNullHandling : defaults.strictNullHandling
+      };
+    };
+    exports$32 = function(str, opts) {
+      var options = normalizeParseOptions(opts);
+      if (str === "" || str === null || typeof str === "undefined") {
+        return options.plainObjects ? /* @__PURE__ */ Object.create(null) : {};
+      }
+      var tempObj = typeof str === "string" ? parseValues(str, options) : str;
+      var obj = options.plainObjects ? /* @__PURE__ */ Object.create(null) : {};
+      var keys = Object.keys(tempObj);
+      for (var i = 0; i < keys.length; ++i) {
+        var key = keys[i];
+        var newObj = parseKeys(key, tempObj[key], options, typeof str === "string");
+        obj = utils.merge(obj, newObj, options);
+      }
+      if (options.allowSparse === true) {
+        return obj;
+      }
+      return utils.compact(obj);
+    };
+    return exports$32;
+  }
+  function dew$13() {
+    if (_dewExec$13) return exports$23;
+    _dewExec$13 = true;
+    var stringify = dew$32();
+    var parse2 = dew$23();
+    var formats = dew$52();
+    exports$23 = {
+      formats,
+      parse: parse2,
+      stringify
+    };
+    return exports$23;
+  }
+  function dew6() {
+    if (_dewExec6) return exports$16;
+    _dewExec6 = true;
+    var punycode = exports4;
+    function Url2() {
+      this.protocol = null;
+      this.slashes = null;
+      this.auth = null;
+      this.host = null;
+      this.port = null;
+      this.hostname = null;
+      this.hash = null;
+      this.search = null;
+      this.query = null;
+      this.pathname = null;
+      this.path = null;
+      this.href = null;
+    }
+    var protocolPattern = /^([a-z0-9.+-]+:)/i, portPattern = /:[0-9]*$/, simplePathPattern = /^(\/\/?(?!\/)[^?\s]*)(\?[^\s]*)?$/, delims = ["<", ">", '"', "`", " ", "\r", "\n", "	"], unwise = ["{", "}", "|", "\\", "^", "`"].concat(delims), autoEscape = ["'"].concat(unwise), nonHostChars = ["%", "/", "?", ";", "#"].concat(autoEscape), hostEndingChars = ["/", "?", "#"], hostnameMaxLen = 255, hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/, hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/, unsafeProtocol = {
+      javascript: true,
+      "javascript:": true
+    }, hostlessProtocol = {
+      javascript: true,
+      "javascript:": true
+    }, slashedProtocol = {
+      http: true,
+      https: true,
+      ftp: true,
+      gopher: true,
+      file: true,
+      "http:": true,
+      "https:": true,
+      "ftp:": true,
+      "gopher:": true,
+      "file:": true
+    }, querystring = dew$13();
+    function urlParse(url, parseQueryString, slashesDenoteHost) {
+      if (url && typeof url === "object" && url instanceof Url2) {
+        return url;
+      }
+      var u = new Url2();
+      u.parse(url, parseQueryString, slashesDenoteHost);
+      return u;
+    }
+    Url2.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
+      if (typeof url !== "string") {
+        throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
+      }
+      var queryIndex = url.indexOf("?"), splitter = queryIndex !== -1 && queryIndex < url.indexOf("#") ? "?" : "#", uSplit = url.split(splitter), slashRegex = /\\/g;
+      uSplit[0] = uSplit[0].replace(slashRegex, "/");
+      url = uSplit.join(splitter);
+      var rest = url;
+      rest = rest.trim();
+      if (!slashesDenoteHost && url.split("#").length === 1) {
+        var simplePath = simplePathPattern.exec(rest);
+        if (simplePath) {
+          this.path = rest;
+          this.href = rest;
+          this.pathname = simplePath[1];
+          if (simplePath[2]) {
+            this.search = simplePath[2];
+            if (parseQueryString) {
+              this.query = querystring.parse(this.search.substr(1));
+            } else {
+              this.query = this.search.substr(1);
+            }
+          } else if (parseQueryString) {
+            this.search = "";
+            this.query = {};
+          }
+          return this;
+        }
+      }
+      var proto = protocolPattern.exec(rest);
+      if (proto) {
+        proto = proto[0];
+        var lowerProto = proto.toLowerCase();
+        this.protocol = lowerProto;
+        rest = rest.substr(proto.length);
+      }
+      if (slashesDenoteHost || proto || rest.match(/^\/\/[^@/]+@[^@/]+/)) {
+        var slashes = rest.substr(0, 2) === "//";
+        if (slashes && !(proto && hostlessProtocol[proto])) {
+          rest = rest.substr(2);
+          this.slashes = true;
+        }
+      }
+      if (!hostlessProtocol[proto] && (slashes || proto && !slashedProtocol[proto])) {
+        var hostEnd = -1;
+        for (var i = 0; i < hostEndingChars.length; i++) {
+          var hec = rest.indexOf(hostEndingChars[i]);
+          if (hec !== -1 && (hostEnd === -1 || hec < hostEnd)) {
+            hostEnd = hec;
+          }
+        }
+        var auth, atSign;
+        if (hostEnd === -1) {
+          atSign = rest.lastIndexOf("@");
+        } else {
+          atSign = rest.lastIndexOf("@", hostEnd);
+        }
+        if (atSign !== -1) {
+          auth = rest.slice(0, atSign);
+          rest = rest.slice(atSign + 1);
+          this.auth = decodeURIComponent(auth);
+        }
+        hostEnd = -1;
+        for (var i = 0; i < nonHostChars.length; i++) {
+          var hec = rest.indexOf(nonHostChars[i]);
+          if (hec !== -1 && (hostEnd === -1 || hec < hostEnd)) {
+            hostEnd = hec;
+          }
+        }
+        if (hostEnd === -1) {
+          hostEnd = rest.length;
+        }
+        this.host = rest.slice(0, hostEnd);
+        rest = rest.slice(hostEnd);
+        this.parseHost();
+        this.hostname = this.hostname || "";
+        var ipv6Hostname = this.hostname[0] === "[" && this.hostname[this.hostname.length - 1] === "]";
+        if (!ipv6Hostname) {
+          var hostparts = this.hostname.split(/\./);
+          for (var i = 0, l = hostparts.length; i < l; i++) {
+            var part = hostparts[i];
+            if (!part) {
+              continue;
+            }
+            if (!part.match(hostnamePartPattern)) {
+              var newpart = "";
+              for (var j = 0, k = part.length; j < k; j++) {
+                if (part.charCodeAt(j) > 127) {
+                  newpart += "x";
+                } else {
+                  newpart += part[j];
+                }
+              }
+              if (!newpart.match(hostnamePartPattern)) {
+                var validParts = hostparts.slice(0, i);
+                var notHost = hostparts.slice(i + 1);
+                var bit = part.match(hostnamePartStart);
+                if (bit) {
+                  validParts.push(bit[1]);
+                  notHost.unshift(bit[2]);
+                }
+                if (notHost.length) {
+                  rest = "/" + notHost.join(".") + rest;
+                }
+                this.hostname = validParts.join(".");
+                break;
+              }
+            }
+          }
+        }
+        if (this.hostname.length > hostnameMaxLen) {
+          this.hostname = "";
+        } else {
+          this.hostname = this.hostname.toLowerCase();
+        }
+        if (!ipv6Hostname) {
+          this.hostname = punycode.toASCII(this.hostname);
+        }
+        var p = this.port ? ":" + this.port : "";
+        var h = this.hostname || "";
+        this.host = h + p;
+        this.href += this.host;
+        if (ipv6Hostname) {
+          this.hostname = this.hostname.substr(1, this.hostname.length - 2);
+          if (rest[0] !== "/") {
+            rest = "/" + rest;
+          }
+        }
+      }
+      if (!unsafeProtocol[lowerProto]) {
+        for (var i = 0, l = autoEscape.length; i < l; i++) {
+          var ae = autoEscape[i];
+          if (rest.indexOf(ae) === -1) {
+            continue;
+          }
+          var esc = encodeURIComponent(ae);
+          if (esc === ae) {
+            esc = escape(ae);
+          }
+          rest = rest.split(ae).join(esc);
+        }
+      }
+      var hash = rest.indexOf("#");
+      if (hash !== -1) {
+        this.hash = rest.substr(hash);
+        rest = rest.slice(0, hash);
+      }
+      var qm = rest.indexOf("?");
+      if (qm !== -1) {
+        this.search = rest.substr(qm);
+        this.query = rest.substr(qm + 1);
+        if (parseQueryString) {
+          this.query = querystring.parse(this.query);
+        }
+        rest = rest.slice(0, qm);
+      } else if (parseQueryString) {
+        this.search = "";
+        this.query = {};
+      }
+      if (rest) {
+        this.pathname = rest;
+      }
+      if (slashedProtocol[lowerProto] && this.hostname && !this.pathname) {
+        this.pathname = "/";
+      }
+      if (this.pathname || this.search) {
+        var p = this.pathname || "";
+        var s = this.search || "";
+        this.path = p + s;
+      }
+      this.href = this.format();
+      return this;
+    };
+    function urlFormat(obj) {
+      if (typeof obj === "string") {
+        obj = urlParse(obj);
+      }
+      if (!(obj instanceof Url2)) {
+        return Url2.prototype.format.call(obj);
+      }
+      return obj.format();
+    }
+    Url2.prototype.format = function() {
+      var auth = this.auth || "";
+      if (auth) {
+        auth = encodeURIComponent(auth);
+        auth = auth.replace(/%3A/i, ":");
+        auth += "@";
+      }
+      var protocol = this.protocol || "", pathname = this.pathname || "", hash = this.hash || "", host = false, query = "";
+      if (this.host) {
+        host = auth + this.host;
+      } else if (this.hostname) {
+        host = auth + (this.hostname.indexOf(":") === -1 ? this.hostname : "[" + this.hostname + "]");
+        if (this.port) {
+          host += ":" + this.port;
+        }
+      }
+      if (this.query && typeof this.query === "object" && Object.keys(this.query).length) {
+        query = querystring.stringify(this.query, {
+          arrayFormat: "repeat",
+          addQueryPrefix: false
+        });
+      }
+      var search = this.search || query && "?" + query || "";
+      if (protocol && protocol.substr(-1) !== ":") {
+        protocol += ":";
+      }
+      if (this.slashes || (!protocol || slashedProtocol[protocol]) && host !== false) {
+        host = "//" + (host || "");
+        if (pathname && pathname.charAt(0) !== "/") {
+          pathname = "/" + pathname;
+        }
+      } else if (!host) {
+        host = "";
+      }
+      if (hash && hash.charAt(0) !== "#") {
+        hash = "#" + hash;
+      }
+      if (search && search.charAt(0) !== "?") {
+        search = "?" + search;
+      }
+      pathname = pathname.replace(/[?#]/g, function(match) {
+        return encodeURIComponent(match);
+      });
+      search = search.replace("#", "%23");
+      return protocol + host + pathname + search + hash;
+    };
+    function urlResolve(source, relative) {
+      return urlParse(source, false, true).resolve(relative);
+    }
+    Url2.prototype.resolve = function(relative) {
+      return this.resolveObject(urlParse(relative, false, true)).format();
+    };
+    function urlResolveObject(source, relative) {
+      if (!source) {
+        return relative;
+      }
+      return urlParse(source, false, true).resolveObject(relative);
+    }
+    Url2.prototype.resolveObject = function(relative) {
+      if (typeof relative === "string") {
+        var rel = new Url2();
+        rel.parse(relative, false, true);
+        relative = rel;
+      }
+      var result = new Url2();
+      var tkeys = Object.keys(this);
+      for (var tk = 0; tk < tkeys.length; tk++) {
+        var tkey = tkeys[tk];
+        result[tkey] = this[tkey];
+      }
+      result.hash = relative.hash;
+      if (relative.href === "") {
+        result.href = result.format();
+        return result;
+      }
+      if (relative.slashes && !relative.protocol) {
+        var rkeys = Object.keys(relative);
+        for (var rk = 0; rk < rkeys.length; rk++) {
+          var rkey = rkeys[rk];
+          if (rkey !== "protocol") {
+            result[rkey] = relative[rkey];
+          }
+        }
+        if (slashedProtocol[result.protocol] && result.hostname && !result.pathname) {
+          result.pathname = "/";
+          result.path = result.pathname;
+        }
+        result.href = result.format();
+        return result;
+      }
+      if (relative.protocol && relative.protocol !== result.protocol) {
+        if (!slashedProtocol[relative.protocol]) {
+          var keys = Object.keys(relative);
+          for (var v = 0; v < keys.length; v++) {
+            var k = keys[v];
+            result[k] = relative[k];
+          }
+          result.href = result.format();
+          return result;
+        }
+        result.protocol = relative.protocol;
+        if (!relative.host && !hostlessProtocol[relative.protocol]) {
+          var relPath = (relative.pathname || "").split("/");
+          while (relPath.length && !(relative.host = relPath.shift())) {
+          }
+          if (!relative.host) {
+            relative.host = "";
+          }
+          if (!relative.hostname) {
+            relative.hostname = "";
+          }
+          if (relPath[0] !== "") {
+            relPath.unshift("");
+          }
+          if (relPath.length < 2) {
+            relPath.unshift("");
+          }
+          result.pathname = relPath.join("/");
+        } else {
+          result.pathname = relative.pathname;
+        }
+        result.search = relative.search;
+        result.query = relative.query;
+        result.host = relative.host || "";
+        result.auth = relative.auth;
+        result.hostname = relative.hostname || relative.host;
+        result.port = relative.port;
+        if (result.pathname || result.search) {
+          var p = result.pathname || "";
+          var s = result.search || "";
+          result.path = p + s;
+        }
+        result.slashes = result.slashes || relative.slashes;
+        result.href = result.format();
+        return result;
+      }
+      var isSourceAbs = result.pathname && result.pathname.charAt(0) === "/", isRelAbs = relative.host || relative.pathname && relative.pathname.charAt(0) === "/", mustEndAbs = isRelAbs || isSourceAbs || result.host && relative.pathname, removeAllDots = mustEndAbs, srcPath = result.pathname && result.pathname.split("/") || [], relPath = relative.pathname && relative.pathname.split("/") || [], psychotic = result.protocol && !slashedProtocol[result.protocol];
+      if (psychotic) {
+        result.hostname = "";
+        result.port = null;
+        if (result.host) {
+          if (srcPath[0] === "") {
+            srcPath[0] = result.host;
+          } else {
+            srcPath.unshift(result.host);
+          }
+        }
+        result.host = "";
+        if (relative.protocol) {
+          relative.hostname = null;
+          relative.port = null;
+          if (relative.host) {
+            if (relPath[0] === "") {
+              relPath[0] = relative.host;
+            } else {
+              relPath.unshift(relative.host);
+            }
+          }
+          relative.host = null;
+        }
+        mustEndAbs = mustEndAbs && (relPath[0] === "" || srcPath[0] === "");
+      }
+      if (isRelAbs) {
+        result.host = relative.host || relative.host === "" ? relative.host : result.host;
+        result.hostname = relative.hostname || relative.hostname === "" ? relative.hostname : result.hostname;
+        result.search = relative.search;
+        result.query = relative.query;
+        srcPath = relPath;
+      } else if (relPath.length) {
+        if (!srcPath) {
+          srcPath = [];
+        }
+        srcPath.pop();
+        srcPath = srcPath.concat(relPath);
+        result.search = relative.search;
+        result.query = relative.query;
+      } else if (relative.search != null) {
+        if (psychotic) {
+          result.host = srcPath.shift();
+          result.hostname = result.host;
+          var authInHost = result.host && result.host.indexOf("@") > 0 ? result.host.split("@") : false;
+          if (authInHost) {
+            result.auth = authInHost.shift();
+            result.hostname = authInHost.shift();
+            result.host = result.hostname;
+          }
+        }
+        result.search = relative.search;
+        result.query = relative.query;
+        if (result.pathname !== null || result.search !== null) {
+          result.path = (result.pathname ? result.pathname : "") + (result.search ? result.search : "");
+        }
+        result.href = result.format();
+        return result;
+      }
+      if (!srcPath.length) {
+        result.pathname = null;
+        if (result.search) {
+          result.path = "/" + result.search;
+        } else {
+          result.path = null;
+        }
+        result.href = result.format();
+        return result;
+      }
+      var last = srcPath.slice(-1)[0];
+      var hasTrailingSlash = (result.host || relative.host || srcPath.length > 1) && (last === "." || last === "..") || last === "";
+      var up = 0;
+      for (var i = srcPath.length; i >= 0; i--) {
+        last = srcPath[i];
+        if (last === ".") {
+          srcPath.splice(i, 1);
+        } else if (last === "..") {
+          srcPath.splice(i, 1);
+          up++;
+        } else if (up) {
+          srcPath.splice(i, 1);
+          up--;
+        }
+      }
+      if (!mustEndAbs && !removeAllDots) {
+        for (; up--; up) {
+          srcPath.unshift("..");
+        }
+      }
+      if (mustEndAbs && srcPath[0] !== "" && (!srcPath[0] || srcPath[0].charAt(0) !== "/")) {
+        srcPath.unshift("");
+      }
+      if (hasTrailingSlash && srcPath.join("/").substr(-1) !== "/") {
+        srcPath.push("");
+      }
+      var isAbsolute = srcPath[0] === "" || srcPath[0] && srcPath[0].charAt(0) === "/";
+      if (psychotic) {
+        result.hostname = isAbsolute ? "" : srcPath.length ? srcPath.shift() : "";
+        result.host = result.hostname;
+        var authInHost = result.host && result.host.indexOf("@") > 0 ? result.host.split("@") : false;
+        if (authInHost) {
+          result.auth = authInHost.shift();
+          result.hostname = authInHost.shift();
+          result.host = result.hostname;
+        }
+      }
+      mustEndAbs = mustEndAbs || result.host && srcPath.length;
+      if (mustEndAbs && !isAbsolute) {
+        srcPath.unshift("");
+      }
+      if (srcPath.length > 0) {
+        result.pathname = srcPath.join("/");
+      } else {
+        result.pathname = null;
+        result.path = null;
+      }
+      if (result.pathname !== null || result.search !== null) {
+        result.path = (result.pathname ? result.pathname : "") + (result.search ? result.search : "");
+      }
+      result.auth = relative.auth || result.auth;
+      result.slashes = result.slashes || relative.slashes;
+      result.href = result.format();
+      return result;
+    };
+    Url2.prototype.parseHost = function() {
+      var host = this.host;
+      var port = portPattern.exec(host);
+      if (port) {
+        port = port[0];
+        if (port !== ":") {
+          this.port = port.substr(1);
+        }
+        host = host.substr(0, host.length - port.length);
+      }
+      if (host) {
+        this.hostname = host;
+      }
+    };
+    exports$16.parse = urlParse;
+    exports$16.resolve = urlResolve;
+    exports$16.resolveObject = urlResolveObject;
+    exports$16.format = urlFormat;
+    exports$16.Url = Url2;
+    return exports$16;
+  }
+  function fileURLToPath(path) {
+    if (typeof path === "string") path = new URL(path);
+    else if (!(path instanceof URL)) {
+      throw new Deno.errors.InvalidData(
+        "invalid argument path , must be a string or URL"
+      );
+    }
+    if (path.protocol !== "file:") {
+      throw new Deno.errors.InvalidData("invalid url scheme");
+    }
+    return isWindows ? getPathFromURLWin(path) : getPathFromURLPosix(path);
+  }
+  function getPathFromURLWin(url) {
+    const hostname = url.hostname;
+    let pathname = url.pathname;
+    for (let n = 0; n < pathname.length; n++) {
+      if (pathname[n] === "%") {
+        const third = pathname.codePointAt(n + 2) || 32;
+        if (pathname[n + 1] === "2" && third === 102 || // 2f 2F /
+        pathname[n + 1] === "5" && third === 99) {
+          throw new Deno.errors.InvalidData(
+            "must not include encoded \\ or / characters"
+          );
+        }
+      }
+    }
+    pathname = pathname.replace(forwardSlashRegEx, "\\");
+    pathname = decodeURIComponent(pathname);
+    if (hostname !== "") {
+      return `\\\\${hostname}${pathname}`;
+    } else {
+      const letter = pathname.codePointAt(1) | 32;
+      const sep = pathname[2];
+      if (letter < CHAR_LOWERCASE_A || letter > CHAR_LOWERCASE_Z || // a..z A..Z
+      sep !== ":") {
+        throw new Deno.errors.InvalidData("file url path must be absolute");
+      }
+      return pathname.slice(1);
+    }
+  }
+  function getPathFromURLPosix(url) {
+    if (url.hostname !== "") {
+      throw new Deno.errors.InvalidData("invalid file url hostname");
+    }
+    const pathname = url.pathname;
+    for (let n = 0; n < pathname.length; n++) {
+      if (pathname[n] === "%") {
+        const third = pathname.codePointAt(n + 2) || 32;
+        if (pathname[n + 1] === "2" && third === 102) {
+          throw new Deno.errors.InvalidData(
+            "must not include encoded / characters"
+          );
+        }
+      }
+    }
+    return decodeURIComponent(pathname);
+  }
+  function pathToFileURL(filepath) {
+    let resolved = exports6.resolve(filepath);
+    const filePathLast = filepath.charCodeAt(filepath.length - 1);
+    if ((filePathLast === CHAR_FORWARD_SLASH || isWindows && filePathLast === CHAR_BACKWARD_SLASH) && resolved[resolved.length - 1] !== exports6.sep) {
+      resolved += "/";
+    }
+    const outURL = new URL("file://");
+    if (resolved.includes("%")) resolved = resolved.replace(percentRegEx, "%25");
+    if (!isWindows && resolved.includes("\\")) {
+      resolved = resolved.replace(backslashRegEx, "%5C");
+    }
+    if (resolved.includes("\n")) resolved = resolved.replace(newlineRegEx, "%0A");
+    if (resolved.includes("\r")) {
+      resolved = resolved.replace(carriageReturnRegEx, "%0D");
+    }
+    if (resolved.includes("	")) resolved = resolved.replace(tabRegEx, "%09");
+    outURL.pathname = resolved;
+    return outURL;
+  }
+  var empty, exports$82, _dewExec$72, _global, exports$72, _dewExec$62, exports$62, _dewExec$52, exports$52, _dewExec$42, exports$42, _dewExec$32, exports$32, _dewExec$23, exports$23, _dewExec$13, exports$16, _dewExec6, exports7, processPlatform, Url, format, resolve, resolveObject, parse, _URL, CHAR_BACKWARD_SLASH, CHAR_FORWARD_SLASH, CHAR_LOWERCASE_A, CHAR_LOWERCASE_Z, isWindows, forwardSlashRegEx, percentRegEx, backslashRegEx, newlineRegEx, carriageReturnRegEx, tabRegEx;
+  var init_url = __esm({
+    "node_modules/@jspm/core/nodelibs/browser/url.js"() {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      init_punycode();
+      init_chunk_DtcTpLWz();
+      init_chunk_BlJi4mNy();
+      init_chunk_DEMDiNwt();
+      empty = Object.freeze(/* @__PURE__ */ Object.create(null));
+      exports$82 = {};
+      _dewExec$72 = false;
+      _global = typeof globalThis !== "undefined" ? globalThis : typeof self !== "undefined" ? self : global;
+      exports$72 = {};
+      _dewExec$62 = false;
+      exports$62 = {};
+      _dewExec$52 = false;
+      exports$52 = {};
+      _dewExec$42 = false;
+      exports$42 = {};
+      _dewExec$32 = false;
+      exports$32 = {};
+      _dewExec$23 = false;
+      exports$23 = {};
+      _dewExec$13 = false;
+      exports$16 = {};
+      _dewExec6 = false;
+      exports7 = dew6();
+      exports7["parse"];
+      exports7["resolve"];
+      exports7["resolveObject"];
+      exports7["format"];
+      exports7["Url"];
+      processPlatform = typeof Deno !== "undefined" ? Deno.build.os === "windows" ? "win32" : Deno.build.os : void 0;
+      exports7.URL = typeof URL !== "undefined" ? URL : null;
+      exports7.pathToFileURL = pathToFileURL;
+      exports7.fileURLToPath = fileURLToPath;
+      Url = exports7.Url;
+      format = exports7.format;
+      resolve = exports7.resolve;
+      resolveObject = exports7.resolveObject;
+      parse = exports7.parse;
+      _URL = exports7.URL;
+      CHAR_BACKWARD_SLASH = 92;
+      CHAR_FORWARD_SLASH = 47;
+      CHAR_LOWERCASE_A = 97;
+      CHAR_LOWERCASE_Z = 122;
+      isWindows = processPlatform === "win32";
+      forwardSlashRegEx = /\//g;
+      percentRegEx = /%/g;
+      backslashRegEx = /\\/g;
+      newlineRegEx = /\n/g;
+      carriageReturnRegEx = /\r/g;
+      tabRegEx = /\t/g;
+    }
+  });
+
+  // node_modules/ws/browser.js
+  var require_browser5 = __commonJS({
+    "node_modules/ws/browser.js"(exports8, module) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      module.exports = function() {
+        throw new Error(
+          "ws does not work in the browser. Browser clients must use the native WebSocket object"
+        );
+      };
+    }
+  });
+
+  // build/lib/BufferedDuplex.js
+  var require_BufferedDuplex = __commonJS({
+    "build/lib/BufferedDuplex.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      exports8.BufferedDuplex = void 0;
+      exports8.writev = writev;
+      var readable_stream_1 = require_browser3();
+      var buffer_1 = (init_buffer(), __toCommonJS(buffer_exports));
+      function writev(chunks, cb) {
+        const buffers = new Array(chunks.length);
+        for (let i = 0; i < chunks.length; i++) {
+          if (typeof chunks[i].chunk === "string") {
+            buffers[i] = buffer_1.Buffer.from(chunks[i].chunk, "utf8");
+          } else {
+            buffers[i] = chunks[i].chunk;
+          }
+        }
+        this._write(buffer_1.Buffer.concat(buffers), "binary", cb);
+      }
+      var BufferedDuplex = class extends readable_stream_1.Duplex {
+        socket;
+        proxy;
+        isSocketOpen;
+        writeQueue;
+        constructor(opts, proxy, socket) {
+          super({
+            objectMode: true
+          });
+          this.proxy = proxy;
+          this.socket = socket;
+          this.writeQueue = [];
+          if (!opts.objectMode) {
+            this._writev = writev.bind(this);
+          }
+          this.isSocketOpen = false;
+          this.proxy.on("data", (chunk) => {
+            if (!this.destroyed && this.readable) {
+              this.push(chunk);
+            }
+          });
+        }
+        _read(size) {
+          this.proxy.read(size);
+        }
+        _write(chunk, encoding, cb) {
+          if (!this.isSocketOpen) {
+            this.writeQueue.push({ chunk, encoding, cb });
+          } else {
+            this.writeToProxy(chunk, encoding, cb);
+          }
+        }
+        _final(callback) {
+          this.writeQueue = [];
+          this.proxy.end(callback);
+        }
+        _destroy(err, callback) {
+          this.writeQueue = [];
+          this.proxy.destroy();
+          callback(err);
+        }
+        socketReady() {
+          this.emit("connect");
+          this.isSocketOpen = true;
+          this.processWriteQueue();
+        }
+        writeToProxy(chunk, encoding, cb) {
+          if (this.proxy.write(chunk, encoding) === false) {
+            this.proxy.once("drain", cb);
+          } else {
+            cb();
+          }
+        }
+        processWriteQueue() {
+          while (this.writeQueue.length > 0) {
+            const { chunk, encoding, cb } = this.writeQueue.shift();
+            this.writeToProxy(chunk, encoding, cb);
+          }
+        }
+      };
+      exports8.BufferedDuplex = BufferedDuplex;
+    }
+  });
+
+  // build/lib/connect/ws.js
+  var require_ws = __commonJS({
+    "build/lib/connect/ws.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __importDefault = exports8 && exports8.__importDefault || function(mod) {
+        return mod && mod.__esModule ? mod : { "default": mod };
+      };
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      exports8.streamBuilder = exports8.browserStreamBuilder = void 0;
+      var buffer_1 = (init_buffer(), __toCommonJS(buffer_exports));
+      var ws_1 = __importDefault(require_browser5());
+      var debug_1 = __importDefault(require_browser4());
+      var readable_stream_1 = require_browser3();
+      var is_browser_1 = __importDefault(require_is_browser());
+      var BufferedDuplex_1 = require_BufferedDuplex();
+      var debug = (0, debug_1.default)("mqttjs:ws");
+      var WSS_OPTIONS = [
+        "rejectUnauthorized",
+        "ca",
+        "cert",
+        "key",
+        "pfx",
+        "passphrase"
+      ];
+      function buildUrl(opts, client) {
+        let url = `${opts.protocol}://${opts.hostname}:${opts.port}${opts.path}`;
+        if (typeof opts.transformWsUrl === "function") {
+          url = opts.transformWsUrl(url, opts, client);
+        }
+        return url;
+      }
+      function setDefaultOpts(opts) {
+        const options = opts;
+        if (!opts.port) {
+          if (opts.protocol === "wss") {
+            options.port = 443;
+          } else {
+            options.port = 80;
+          }
+        }
+        if (!opts.path) {
+          options.path = "/";
+        }
+        if (!opts.wsOptions) {
+          options.wsOptions = {};
+        }
+        if (!is_browser_1.default && !opts.forceNativeWebSocket && opts.protocol === "wss") {
+          WSS_OPTIONS.forEach((prop) => {
+            if (Object.prototype.hasOwnProperty.call(opts, prop) && !Object.prototype.hasOwnProperty.call(opts.wsOptions, prop)) {
+              options.wsOptions[prop] = opts[prop];
+            }
+          });
+        }
+        return options;
+      }
+      function setDefaultBrowserOpts(opts) {
+        const options = setDefaultOpts(opts);
+        if (!options.hostname) {
+          options.hostname = options.host;
+        }
+        if (!options.hostname) {
+          if (typeof document === "undefined") {
+            throw new Error("Could not determine host. Specify host manually.");
+          }
+          const parsed = new URL(document.URL);
+          options.hostname = parsed.hostname;
+          if (!options.port) {
+            options.port = Number(parsed.port);
+          }
+        }
+        if (options.objectMode === void 0) {
+          options.objectMode = !(options.binary === true || options.binary === void 0);
+        }
+        return options;
+      }
+      function createWebSocket(client, url, opts) {
+        debug("createWebSocket");
+        debug(`protocol: ${opts.protocolId} ${opts.protocolVersion}`);
+        const websocketSubProtocol = opts.protocolId === "MQIsdp" && opts.protocolVersion === 3 ? "mqttv3.1" : "mqtt";
+        debug(`creating new Websocket for url: ${url} and protocol: ${websocketSubProtocol}`);
+        let socket;
+        if (opts.createWebsocket) {
+          socket = opts.createWebsocket(url, [websocketSubProtocol], opts);
+        } else {
+          socket = new ws_1.default(url, [websocketSubProtocol], opts.wsOptions);
+        }
+        return socket;
+      }
+      function createBrowserWebSocket(client, opts) {
+        const websocketSubProtocol = opts.protocolId === "MQIsdp" && opts.protocolVersion === 3 ? "mqttv3.1" : "mqtt";
+        const url = buildUrl(opts, client);
+        let socket;
+        if (opts.createWebsocket) {
+          socket = opts.createWebsocket(url, [websocketSubProtocol], opts);
+        } else {
+          socket = new WebSocket(url, [websocketSubProtocol]);
+        }
+        socket.binaryType = "arraybuffer";
+        return socket;
+      }
+      var streamBuilder = (client, opts) => {
+        debug("streamBuilder");
+        const options = setDefaultOpts(opts);
+        options.hostname = options.hostname || options.host || "localhost";
+        const url = buildUrl(options, client);
+        const socket = createWebSocket(client, url, options);
+        const webSocketStream = ws_1.default.createWebSocketStream(socket, options.wsOptions);
+        webSocketStream["url"] = url;
+        socket.on("close", () => {
+          webSocketStream.destroy();
+        });
+        return webSocketStream;
+      };
+      exports8.streamBuilder = streamBuilder;
+      var browserStreamBuilder = (client, opts) => {
+        debug("browserStreamBuilder");
+        let stream;
+        const options = setDefaultBrowserOpts(opts);
+        const bufferSize = options.browserBufferSize || 1024 * 512;
+        const bufferTimeout = opts.browserBufferTimeout || 1e3;
+        const coerceToBuffer = !opts.objectMode;
+        const socket = createBrowserWebSocket(client, opts);
+        const proxy = buildProxy(opts, socketWriteBrowser, socketEndBrowser);
+        if (!opts.objectMode) {
+          proxy._writev = BufferedDuplex_1.writev.bind(proxy);
+        }
+        proxy.on("close", () => {
+          socket.close();
+        });
+        const eventListenerSupport = typeof socket.addEventListener !== "undefined";
+        if (socket.readyState === socket.OPEN) {
+          stream = proxy;
+          stream.socket = socket;
+        } else {
+          stream = new BufferedDuplex_1.BufferedDuplex(opts, proxy, socket);
+          if (eventListenerSupport) {
+            socket.addEventListener("open", onOpen);
+          } else {
+            socket.onopen = onOpen;
+          }
+        }
+        if (eventListenerSupport) {
+          socket.addEventListener("close", onClose);
+          socket.addEventListener("error", onError);
+          socket.addEventListener("message", onMessage);
+        } else {
+          socket.onclose = onClose;
+          socket.onerror = onError;
+          socket.onmessage = onMessage;
+        }
+        function buildProxy(pOptions, socketWrite, socketEnd) {
+          const _proxy = new readable_stream_1.Transform({
+            objectMode: pOptions.objectMode
+          });
+          _proxy._write = socketWrite;
+          _proxy._flush = socketEnd;
+          return _proxy;
+        }
+        function onOpen() {
+          debug("WebSocket onOpen");
+          if (stream instanceof BufferedDuplex_1.BufferedDuplex) {
+            stream.socketReady();
+          }
+        }
+        function onClose(event) {
+          debug("WebSocket onClose", event);
+          stream.end();
+          stream.destroy();
+        }
+        function onError(err) {
+          debug("WebSocket onError", err);
+          const error = new Error("WebSocket error");
+          error["event"] = err;
+          stream.destroy(error);
+        }
+        async function onMessage(event) {
+          if (!proxy || !proxy.readable || !proxy.writable) {
+            return;
+          }
+          let { data } = event;
+          if (data instanceof ArrayBuffer)
+            data = buffer_1.Buffer.from(data);
+          else if (data instanceof Blob)
+            data = buffer_1.Buffer.from(await new Response(data).arrayBuffer());
+          else
+            data = buffer_1.Buffer.from(data, "utf8");
+          proxy.push(data);
+        }
+        function socketWriteBrowser(chunk, enc, next) {
+          if (socket.bufferedAmount > bufferSize) {
+            setTimeout(socketWriteBrowser, bufferTimeout, chunk, enc, next);
+            return;
+          }
+          if (coerceToBuffer && typeof chunk === "string") {
+            chunk = buffer_1.Buffer.from(chunk, "utf8");
+          }
+          try {
+            socket.send(chunk);
+          } catch (err) {
+            return next(err);
+          }
+          next();
+        }
+        function socketEndBrowser(done) {
+          socket.close();
+          done();
+        }
+        return stream;
+      };
+      exports8.browserStreamBuilder = browserStreamBuilder;
+    }
+  });
+
+  // node_modules/@jspm/core/nodelibs/browser/net.js
+  var net_exports = {};
+  __export(net_exports, {
+    Server: () => unimplemented3,
+    Socket: () => unimplemented3,
+    Stream: () => unimplemented3,
+    _createServerHandle: () => unimplemented3,
+    _normalizeArgs: () => unimplemented3,
+    _setSimultaneousAccepts: () => unimplemented3,
+    connect: () => unimplemented3,
+    createConnection: () => unimplemented3,
+    createServer: () => unimplemented3,
+    default: () => net,
+    isIP: () => unimplemented3,
+    isIPv4: () => unimplemented3,
+    isIPv6: () => unimplemented3
+  });
+  function unimplemented3() {
+    throw new Error("Node.js net module is not supported by JSPM core outside of Node.js");
+  }
+  var net;
+  var init_net = __esm({
+    "node_modules/@jspm/core/nodelibs/browser/net.js"() {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      net = {
+        _createServerHandle: unimplemented3,
+        _normalizeArgs: unimplemented3,
+        _setSimultaneousAccepts: unimplemented3,
+        connect: unimplemented3,
+        createConnection: unimplemented3,
+        createServer: unimplemented3,
+        isIP: unimplemented3,
+        isIPv4: unimplemented3,
+        isIPv6: unimplemented3,
+        Server: unimplemented3,
+        Socket: unimplemented3,
+        Stream: unimplemented3
+      };
+    }
+  });
+
+  // socks-stub:./socks
+  var require_socks = __commonJS({
+    "socks-stub:./socks"(exports8, module) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      module.exports = {};
+    }
+  });
+
+  // build/lib/connect/tcp.js
+  var require_tcp = __commonJS({
+    "build/lib/connect/tcp.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __importDefault = exports8 && exports8.__importDefault || function(mod) {
+        return mod && mod.__esModule ? mod : { "default": mod };
+      };
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var net_1 = __importDefault((init_net(), __toCommonJS(net_exports)));
+      var debug_1 = __importDefault(require_browser4());
+      var socks_1 = __importDefault(require_socks());
+      var debug = (0, debug_1.default)("mqttjs:tcp");
+      var buildStream = (client, opts) => {
+        opts.port = opts.port || 1883;
+        opts.hostname = opts.hostname || opts.host || "localhost";
+        if (opts.socksProxy) {
+          return (0, socks_1.default)(opts.hostname, opts.port, opts.socksProxy, {
+            timeout: opts.socksTimeout
+          });
+        }
+        const { port, path } = opts;
+        const host = opts.hostname;
+        debug("port %d and host %s", port, host);
+        return net_1.default.createConnection({ port, host, path });
+      };
+      exports8.default = buildStream;
+    }
+  });
+
+  // node_modules/esbuild-plugin-polyfill-node/polyfills/empty.js
+  var empty_exports = {};
+  __export(empty_exports, {
+    default: () => empty_default
+  });
+  var empty_default;
+  var init_empty = __esm({
+    "node_modules/esbuild-plugin-polyfill-node/polyfills/empty.js"() {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      empty_default = {};
+    }
+  });
+
+  // build/lib/connect/tls.js
+  var require_tls = __commonJS({
+    "build/lib/connect/tls.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __importDefault = exports8 && exports8.__importDefault || function(mod) {
+        return mod && mod.__esModule ? mod : { "default": mod };
+      };
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var tls_1 = (init_empty(), __toCommonJS(empty_exports));
+      var net_1 = __importDefault((init_net(), __toCommonJS(net_exports)));
+      var debug_1 = __importDefault(require_browser4());
+      var socks_1 = __importDefault(require_socks());
+      var debug = (0, debug_1.default)("mqttjs:tls");
+      function connect(opts) {
+        const { host, port, socksProxy, ...rest } = opts;
+        if (socksProxy !== void 0) {
+          const socket = (0, socks_1.default)(host, port, socksProxy, {
+            timeout: opts.socksTimeout
+          });
+          return (0, tls_1.connect)({
+            ...rest,
+            socket
+          });
+        }
+        return (0, tls_1.connect)(opts);
+      }
+      var buildStream = (client, opts) => {
+        opts.port = opts.port || 8883;
+        opts.host = opts.hostname || opts.host || "localhost";
+        if (net_1.default.isIP(opts.host) === 0) {
+          opts.servername = opts.host;
+        }
+        opts.rejectUnauthorized = opts.rejectUnauthorized !== false;
+        delete opts.path;
+        debug("port %d host %s rejectUnauthorized %b", opts.port, opts.host, opts.rejectUnauthorized);
+        const connection = connect(opts);
+        connection.on("secureConnect", () => {
+          if (opts.rejectUnauthorized && !connection.authorized) {
+            connection.emit("error", new Error("TLS not authorized"));
+          } else {
+            connection.removeListener("error", handleTLSerrors);
+          }
+        });
+        function handleTLSerrors(err) {
+          if (opts.rejectUnauthorized) {
+            client.emit("error", err);
+          }
+          connection.end();
+        }
+        connection.on("error", handleTLSerrors);
+        return connection;
+      };
+      exports8.default = buildStream;
+    }
+  });
+
+  // build/lib/connect/wx.js
+  var require_wx = __commonJS({
+    "build/lib/connect/wx.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var buffer_1 = (init_buffer(), __toCommonJS(buffer_exports));
+      var readable_stream_1 = require_browser3();
+      var BufferedDuplex_1 = require_BufferedDuplex();
+      var socketTask;
+      var proxy;
+      var stream;
+      function buildProxy() {
+        const _proxy = new readable_stream_1.Transform();
+        _proxy._write = (chunk, encoding, next) => {
+          socketTask.send({
+            data: chunk.buffer,
+            success() {
+              next();
+            },
+            fail(errMsg) {
+              next(new Error(errMsg));
+            }
+          });
+        };
+        _proxy._flush = (done) => {
+          socketTask.close({
+            success() {
+              done();
+            }
+          });
+        };
+        return _proxy;
+      }
+      function setDefaultOpts(opts) {
+        if (!opts.hostname) {
+          opts.hostname = "localhost";
+        }
+        if (!opts.path) {
+          opts.path = "/";
+        }
+        if (!opts.wsOptions) {
+          opts.wsOptions = {};
+        }
+      }
+      function buildUrl(opts, client) {
+        const protocol = opts.protocol === "wxs" ? "wss" : "ws";
+        let url = `${protocol}://${opts.hostname}${opts.path}`;
+        if (opts.port && opts.port !== 80 && opts.port !== 443) {
+          url = `${protocol}://${opts.hostname}:${opts.port}${opts.path}`;
+        }
+        if (typeof opts.transformWsUrl === "function") {
+          url = opts.transformWsUrl(url, opts, client);
+        }
+        return url;
+      }
+      function bindEventHandler() {
+        socketTask.onOpen(() => {
+          stream.socketReady();
+        });
+        socketTask.onMessage((res) => {
+          let { data } = res;
+          if (data instanceof ArrayBuffer)
+            data = buffer_1.Buffer.from(data);
+          else
+            data = buffer_1.Buffer.from(data, "utf8");
+          proxy.push(data);
+        });
+        socketTask.onClose(() => {
+          stream.emit("close");
+          stream.end();
+          stream.destroy();
+        });
+        socketTask.onError((error) => {
+          const err = new Error(error.errMsg);
+          stream.destroy(err);
+        });
+      }
+      var buildStream = (client, opts) => {
+        opts.hostname = opts.hostname || opts.host;
+        if (!opts.hostname) {
+          throw new Error("Could not determine host. Specify host manually.");
+        }
+        const websocketSubProtocol = opts.protocolId === "MQIsdp" && opts.protocolVersion === 3 ? "mqttv3.1" : "mqtt";
+        setDefaultOpts(opts);
+        const url = buildUrl(opts, client);
+        socketTask = wx.connectSocket({
+          url,
+          protocols: [websocketSubProtocol]
+        });
+        proxy = buildProxy();
+        stream = new BufferedDuplex_1.BufferedDuplex(opts, proxy, socketTask);
+        stream._destroy = (err, cb) => {
+          socketTask.close({
+            success() {
+              if (cb)
+                cb(err);
+            }
+          });
+        };
+        const destroyRef = stream.destroy;
+        stream.destroy = (err, cb) => {
+          stream.destroy = destroyRef;
+          setTimeout(() => {
+            socketTask.close({
+              fail() {
+                stream._destroy(err, cb);
+              }
+            });
+          }, 0);
+          return stream;
+        };
+        bindEventHandler();
+        return stream;
+      };
+      exports8.default = buildStream;
+    }
+  });
+
+  // build/lib/connect/ali.js
+  var require_ali = __commonJS({
+    "build/lib/connect/ali.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var buffer_1 = (init_buffer(), __toCommonJS(buffer_exports));
+      var readable_stream_1 = require_browser3();
+      var BufferedDuplex_1 = require_BufferedDuplex();
+      var my;
+      var proxy;
+      var stream;
+      var isInitialized = false;
+      function buildProxy() {
+        const _proxy = new readable_stream_1.Transform();
+        _proxy._write = (chunk, encoding, next) => {
+          my.sendSocketMessage({
+            data: chunk.buffer,
+            success() {
+              next();
+            },
+            fail() {
+              next(new Error());
+            }
+          });
+        };
+        _proxy._flush = (done) => {
+          my.closeSocket({
+            success() {
+              done();
+            }
+          });
+        };
+        return _proxy;
+      }
+      function setDefaultOpts(opts) {
+        if (!opts.hostname) {
+          opts.hostname = "localhost";
+        }
+        if (!opts.path) {
+          opts.path = "/";
+        }
+        if (!opts.wsOptions) {
+          opts.wsOptions = {};
+        }
+      }
+      function buildUrl(opts, client) {
+        const protocol = opts.protocol === "alis" ? "wss" : "ws";
+        let url = `${protocol}://${opts.hostname}${opts.path}`;
+        if (opts.port && opts.port !== 80 && opts.port !== 443) {
+          url = `${protocol}://${opts.hostname}:${opts.port}${opts.path}`;
+        }
+        if (typeof opts.transformWsUrl === "function") {
+          url = opts.transformWsUrl(url, opts, client);
+        }
+        return url;
+      }
+      function bindEventHandler() {
+        if (isInitialized)
+          return;
+        isInitialized = true;
+        my.onSocketOpen(() => {
+          stream.socketReady();
+        });
+        my.onSocketMessage((res) => {
+          if (typeof res.data === "string") {
+            const buffer = buffer_1.Buffer.from(res.data, "base64");
+            proxy.push(buffer);
+          } else {
+            const reader = new FileReader();
+            reader.addEventListener("load", () => {
+              if (reader.result instanceof ArrayBuffer) {
+                proxy.push(buffer_1.Buffer.from(reader.result));
+                return;
+              }
+              proxy.push(buffer_1.Buffer.from(reader.result, "utf-8"));
+            });
+            reader.readAsArrayBuffer(res.data);
+          }
+        });
+        my.onSocketClose(() => {
+          stream.end();
+          stream.destroy();
+        });
+        my.onSocketError((err) => {
+          stream.destroy(err);
+        });
+      }
+      var buildStream = (client, opts) => {
+        opts.hostname = opts.hostname || opts.host;
+        if (!opts.hostname) {
+          throw new Error("Could not determine host. Specify host manually.");
+        }
+        const websocketSubProtocol = opts.protocolId === "MQIsdp" && opts.protocolVersion === 3 ? "mqttv3.1" : "mqtt";
+        setDefaultOpts(opts);
+        const url = buildUrl(opts, client);
+        my = opts.my;
+        my.connectSocket({
+          url,
+          protocols: websocketSubProtocol
+        });
+        proxy = buildProxy();
+        stream = new BufferedDuplex_1.BufferedDuplex(opts, proxy, my);
+        bindEventHandler();
+        return stream;
+      };
+      exports8.default = buildStream;
+    }
+  });
+
+  // build/lib/connect/index.js
+  var require_connect = __commonJS({
+    "build/lib/connect/index.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __importDefault = exports8 && exports8.__importDefault || function(mod) {
+        return mod && mod.__esModule ? mod : { "default": mod };
+      };
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      exports8.connectAsync = connectAsync;
+      var debug_1 = __importDefault(require_browser4());
+      var url_1 = __importDefault((init_url(), __toCommonJS(url_exports)));
+      var client_1 = __importDefault(require_client());
+      var is_browser_1 = __importDefault(require_is_browser());
+      if (typeof process_exports?.nextTick !== "function") {
+        process_exports.nextTick = setImmediate;
+      }
+      var debug = (0, debug_1.default)("mqttjs");
+      var protocols = null;
+      function parseAuthOptions(opts) {
+        let matches;
+        if (opts.auth) {
+          matches = opts.auth.match(/^(.+):(.+)$/);
+          if (matches) {
+            const [, username, password] = matches;
+            opts.username = username;
+            opts.password = password;
+          } else {
+            opts.username = opts.auth;
+          }
+        }
+      }
+      function connect(brokerUrl, opts) {
+        debug("connecting to an MQTT broker...");
+        if (typeof brokerUrl === "object" && !opts) {
+          opts = brokerUrl;
+          brokerUrl = "";
+        }
+        opts = opts || {};
+        if (brokerUrl && typeof brokerUrl === "string") {
+          const parsedUrl = url_1.default.parse(brokerUrl, true);
+          const parsedOptions = {};
+          if (parsedUrl.port != null) {
+            parsedOptions.port = Number(parsedUrl.port);
+          }
+          parsedOptions.host = parsedUrl.hostname;
+          parsedOptions.query = parsedUrl.query;
+          parsedOptions.auth = parsedUrl.auth;
+          parsedOptions.protocol = parsedUrl.protocol;
+          parsedOptions.path = parsedUrl.path;
+          opts = { ...parsedOptions, ...opts };
+          if (!opts.protocol) {
+            throw new Error("Missing protocol");
+          }
+          opts.protocol = opts.protocol.replace(/:$/, "");
+        }
+        opts.unixSocket = opts.unixSocket || opts.protocol?.includes("+unix");
+        if (opts.unixSocket) {
+          opts.protocol = opts.protocol.replace("+unix", "");
+        } else if (!opts.protocol?.startsWith("ws") && !opts.protocol?.startsWith("wx")) {
+          delete opts.path;
+        }
+        parseAuthOptions(opts);
+        if (opts.query && typeof opts.query.clientId === "string") {
+          opts.clientId = opts.query.clientId;
+        }
+        if (is_browser_1.default || opts.unixSocket) {
+          opts.socksProxy = void 0;
+        } else if (opts.socksProxy === void 0 && typeof process_exports !== "undefined") {
+          opts.socksProxy = process_exports.env["MQTTJS_SOCKS_PROXY"];
+        }
+        if (opts.cert && opts.key) {
+          if (opts.protocol) {
+            if (["mqtts", "wss", "wxs", "alis"].indexOf(opts.protocol) === -1) {
+              switch (opts.protocol) {
+                case "mqtt":
+                  opts.protocol = "mqtts";
+                  break;
+                case "ws":
+                  opts.protocol = "wss";
+                  break;
+                case "wx":
+                  opts.protocol = "wxs";
+                  break;
+                case "ali":
+                  opts.protocol = "alis";
+                  break;
+                default:
+                  throw new Error(`Unknown protocol for secure connection: "${opts.protocol}"!`);
+              }
+            }
+          } else {
+            throw new Error("Missing secure protocol key");
+          }
+        }
+        if (!protocols) {
+          protocols = {};
+          if (!is_browser_1.default && !opts.forceNativeWebSocket) {
+            protocols.ws = require_ws().streamBuilder;
+            protocols.wss = require_ws().streamBuilder;
+            protocols.mqtt = require_tcp().default;
+            protocols.tcp = require_tcp().default;
+            protocols.ssl = require_tls().default;
+            protocols.tls = protocols.ssl;
+            protocols.mqtts = require_tls().default;
+          } else {
+            protocols.ws = require_ws().browserStreamBuilder;
+            protocols.wss = require_ws().browserStreamBuilder;
+            protocols.wx = require_wx().default;
+            protocols.wxs = require_wx().default;
+            protocols.ali = require_ali().default;
+            protocols.alis = require_ali().default;
+          }
+        }
+        if (!protocols[opts.protocol]) {
+          const isSecure = ["mqtts", "wss"].indexOf(opts.protocol) !== -1;
+          opts.protocol = [
+            "mqtt",
+            "mqtts",
+            "ws",
+            "wss",
+            "wx",
+            "wxs",
+            "ali",
+            "alis"
+          ].filter((key, index) => {
+            if (isSecure && index % 2 === 0) {
+              return false;
+            }
+            return typeof protocols[key] === "function";
+          })[0];
+        }
+        if (opts.clean === false && !opts.clientId) {
+          throw new Error("Missing clientId for unclean clients");
+        }
+        if (opts.protocol) {
+          opts.defaultProtocol = opts.protocol;
+        }
+        function wrapper(client2) {
+          if (opts.servers) {
+            if (!client2._reconnectCount || client2._reconnectCount === opts.servers.length) {
+              client2._reconnectCount = 0;
+            }
+            opts.host = opts.servers[client2._reconnectCount].host;
+            opts.port = opts.servers[client2._reconnectCount].port;
+            opts.protocol = !opts.servers[client2._reconnectCount].protocol ? opts.defaultProtocol : opts.servers[client2._reconnectCount].protocol;
+            opts.hostname = opts.host;
+            client2._reconnectCount++;
+          }
+          debug("calling streambuilder for", opts.protocol);
+          return protocols[opts.protocol](client2, opts);
+        }
+        const client = new client_1.default(wrapper, opts);
+        client.on("error", () => {
+        });
+        return client;
+      }
+      function connectAsync(brokerUrl, opts, allowRetries = true) {
+        return new Promise((resolve2, reject) => {
+          const client = connect(brokerUrl, opts);
+          const promiseResolutionListeners = {
+            connect: (connack) => {
+              removePromiseResolutionListeners();
+              resolve2(client);
+            },
+            end: () => {
+              removePromiseResolutionListeners();
+              resolve2(client);
+            },
+            error: (err) => {
+              removePromiseResolutionListeners();
+              client.end();
+              reject(err);
+            }
+          };
+          if (allowRetries === false) {
+            promiseResolutionListeners.close = () => {
+              promiseResolutionListeners.error(new Error("Couldn't connect to server"));
+            };
+          }
+          function removePromiseResolutionListeners() {
+            Object.keys(promiseResolutionListeners).forEach((eventName) => {
+              client.off(eventName, promiseResolutionListeners[eventName]);
+            });
+          }
+          Object.keys(promiseResolutionListeners).forEach((eventName) => {
+            client.on(eventName, promiseResolutionListeners[eventName]);
+          });
+        });
+      }
+      exports8.default = connect;
+    }
+  });
+
+  // build/mqtt.js
+  var require_mqtt2 = __commonJS({
+    "build/mqtt.js"(exports8) {
+      "use strict";
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __createBinding = exports8 && exports8.__createBinding || (Object.create ? (function(o, m, k, k2) {
+        if (k2 === void 0) k2 = k;
+        var desc = Object.getOwnPropertyDescriptor(m, k);
+        if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+          desc = { enumerable: true, get: function() {
+            return m[k];
+          } };
+        }
+        Object.defineProperty(o, k2, desc);
+      }) : (function(o, m, k, k2) {
+        if (k2 === void 0) k2 = k;
+        o[k2] = m[k];
+      }));
+      var __setModuleDefault = exports8 && exports8.__setModuleDefault || (Object.create ? (function(o, v) {
+        Object.defineProperty(o, "default", { enumerable: true, value: v });
+      }) : function(o, v) {
+        o["default"] = v;
+      });
+      var __importStar = exports8 && exports8.__importStar || /* @__PURE__ */ (function() {
+        var ownKeys = function(o) {
+          ownKeys = Object.getOwnPropertyNames || function(o2) {
+            var ar = [];
+            for (var k in o2) if (Object.prototype.hasOwnProperty.call(o2, k)) ar[ar.length] = k;
+            return ar;
+          };
+          return ownKeys(o);
+        };
+        return function(mod) {
+          if (mod && mod.__esModule) return mod;
+          var result = {};
+          if (mod != null) {
+            for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
+          }
+          __setModuleDefault(result, mod);
+          return result;
+        };
+      })();
+      var __exportStar = exports8 && exports8.__exportStar || function(m, exports9) {
+        for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports9, p)) __createBinding(exports9, m, p);
+      };
+      var __importDefault = exports8 && exports8.__importDefault || function(mod) {
+        return mod && mod.__esModule ? mod : { "default": mod };
+      };
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      exports8.ReasonCodes = exports8.KeepaliveManager = exports8.UniqueMessageIdProvider = exports8.DefaultMessageIdProvider = exports8.Store = exports8.MqttClient = exports8.connectAsync = exports8.connect = exports8.Client = void 0;
+      var client_1 = __importDefault(require_client());
+      exports8.MqttClient = client_1.default;
+      var default_message_id_provider_1 = __importDefault(require_default_message_id_provider());
+      exports8.DefaultMessageIdProvider = default_message_id_provider_1.default;
+      var unique_message_id_provider_1 = __importDefault(require_unique_message_id_provider());
+      exports8.UniqueMessageIdProvider = unique_message_id_provider_1.default;
+      var store_1 = __importDefault(require_store());
+      exports8.Store = store_1.default;
+      var connect_1 = __importStar(require_connect());
+      exports8.connect = connect_1.default;
+      Object.defineProperty(exports8, "connectAsync", { enumerable: true, get: function() {
+        return connect_1.connectAsync;
+      } });
+      var KeepaliveManager_1 = __importDefault(require_KeepaliveManager());
+      exports8.KeepaliveManager = KeepaliveManager_1.default;
+      exports8.Client = client_1.default;
+      __exportStar(require_client(), exports8);
+      __exportStar(require_shared(), exports8);
+      __exportStar(require_validations(), exports8);
+      var ack_1 = require_ack();
+      Object.defineProperty(exports8, "ReasonCodes", { enumerable: true, get: function() {
+        return ack_1.ReasonCodes;
+      } });
+    }
+  });
+
+  // build/index.js
+  var require_index = __commonJS({
+    "build/index.js"(exports8) {
+      init_dirname();
+      init_buffer2();
+      init_process2();
+      var __createBinding = exports8 && exports8.__createBinding || (Object.create ? (function(o, m, k, k2) {
+        if (k2 === void 0) k2 = k;
+        var desc = Object.getOwnPropertyDescriptor(m, k);
+        if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+          desc = { enumerable: true, get: function() {
+            return m[k];
+          } };
+        }
+        Object.defineProperty(o, k2, desc);
+      }) : (function(o, m, k, k2) {
+        if (k2 === void 0) k2 = k;
+        o[k2] = m[k];
+      }));
+      var __setModuleDefault = exports8 && exports8.__setModuleDefault || (Object.create ? (function(o, v) {
+        Object.defineProperty(o, "default", { enumerable: true, value: v });
+      }) : function(o, v) {
+        o["default"] = v;
+      });
+      var __importStar = exports8 && exports8.__importStar || /* @__PURE__ */ (function() {
+        var ownKeys = function(o) {
+          ownKeys = Object.getOwnPropertyNames || function(o2) {
+            var ar = [];
+            for (var k in o2) if (Object.prototype.hasOwnProperty.call(o2, k)) ar[ar.length] = k;
+            return ar;
+          };
+          return ownKeys(o);
+        };
+        return function(mod) {
+          if (mod && mod.__esModule) return mod;
+          var result = {};
+          if (mod != null) {
+            for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
+          }
+          __setModuleDefault(result, mod);
+          return result;
+        };
+      })();
+      var __exportStar = exports8 && exports8.__exportStar || function(m, exports9) {
+        for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(exports9, p)) __createBinding(exports9, m, p);
+      };
+      Object.defineProperty(exports8, "__esModule", { value: true });
+      var mqtt = __importStar(require_mqtt2());
+      exports8.default = mqtt;
+      __exportStar(require_mqtt2(), exports8);
+    }
+  });
+  return require_index();
+})();
+/*! Bundled license information:
+
+@jspm/core/nodelibs/browser/chunk-DtuTasat.js:
+  (*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> *)
+
+safe-buffer/index.js:
+  (*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> *)
+
+@babel/runtime/helpers/regenerator.js:
+  (*! regenerator-runtime -- Copyright (c) 2014-present, Facebook, Inc. -- license (MIT): https://github.com/babel/babel/blob/main/packages/babel-helpers/LICENSE *)
+*/
diff --git a/mqtt-backend/node_modules/mqtt/dist/mqtt.min.js b/mqtt-backend/node_modules/mqtt/dist/mqtt.min.js
new file mode 100644
index 0000000..ea2ac30
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt/dist/mqtt.min.js
@@ -0,0 +1,19 @@
+"use strict";var mqtt=(()=>{var as=Object.defineProperty;var Yb=Object.getOwnPropertyDescriptor;var Jb=Object.getOwnPropertyNames;var Xb=Object.prototype.hasOwnProperty;var ze=(t,e)=>()=>(t&&(e=t(t=0)),e);var j=(t,e)=>()=>(e||t((e={exports:{}}).exports,e),e.exports),Kr=(t,e)=>{for(var r in e)as(t,r,{get:e[r],enumerable:!0})},Zb=(t,e,r,n)=>{if(e&&typeof e=="object"||typeof e=="function")for(let i of Jb(e))!Xb.call(t,i)&&i!==r&&as(t,i,{get:()=>e[i],enumerable:!(n=Yb(e,i))||n.enumerable});return t};var me=t=>Zb(as({},"__esModule",{value:!0}),t);var A=ze(()=>{});var 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navigator<"u"&&navigator.userAgent&&navigator.userAgent.toLowerCase().match(/(edge|trident)\/(\d+)/))return!1;let t;return typeof document<"u"&&document.documentElement&&document.documentElement.style&&document.documentElement.style.WebkitAppearance||typeof window<"u"&&window.console&&(window.console.firebug||window.console.exception&&window.console.table)||typeof navigator<"u"&&navigator.userAgent&&(t=navigator.userAgent.toLowerCase().match(/firefox\/(\d+)/))&&parseInt(t[1],10)>=31||typeof navigator<"u"&&navigator.userAgent&&navigator.userAgent.toLowerCase().match(/applewebkit\/(\d+)/)}function FS(t){if(t[0]=(this.useColors?"%c":"")+this.namespace+(this.useColors?" %c":" ")+t[0]+(this.useColors?"%c ":" ")+"+"+po.exports.humanize(this.diff),!this.useColors)return;let e="color: "+this.color;t.splice(1,0,e,"color: inherit");let r=0,n=0;t[0].replace(/%[a-zA-Z%]/g,i=>{i!=="%%"&&(r++,i==="%c"&&(n=r))}),t.splice(n,0,e)}Qe.log=console.debug||console.log||(()=>{});function WS(t){try{t?Qe.storage.setItem("debug",t):Qe.storage.removeItem("debug")}catch{}}function $S(){let t;try{t=Qe.storage.getItem("debug")||Qe.storage.getItem("DEBUG")}catch{}return!t&&typeof N<"u"&&"env"in N&&(t=N.env.DEBUG),t}function HS(){try{return localStorage}catch{}}po.exports=jp()(Qe);var{formatters:VS}=po.exports;VS.j=function(t){try{return JSON.stringify(t)}catch(e){return"[UnexpectedJSONParseError]: "+e.message}}});var $p=j((mB,Wp)=>{A();x();I();var GS=Bp(),{EventEmitter:zS}=(er(),me(Zt)),Fp=Np(),pe=Pa(),ae=At()("mqtt-packet:parser"),Oa=class t extends zS{constructor(){super(),this.parser=this.constructor.parser}static parser(e){return this instanceof t?(this.settings=e||{},this._states=["_parseHeader","_parseLength","_parsePayload","_newPacket"],this._resetState(),this):new t().parser(e)}_resetState(){ae("_resetState: resetting packet, error, _list, and _stateCounter"),this.packet=new Fp,this.error=null,this._list=GS(),this._stateCounter=0}parse(e){for(this.error&&this._resetState(),this._list.append(e),ae("parse: current state: %s",this._states[this._stateCounter]);(this.packet.length!==-1||this._list.length>0)&&this[this._states[this._stateCounter]]()&&!this.error;)this._stateCounter++,ae("parse: state complete. _stateCounter is now: %d",this._stateCounter),ae("parse: packet.length: %d, buffer list length: %d",this.packet.length,this._list.length),this._stateCounter>=this._states.length&&(this._stateCounter=0);return ae("parse: exited while loop. packet: %d, buffer list length: %d",this.packet.length,this._list.length),this._list.length}_parseHeader(){let e=this._list.readUInt8(0),r=e>>pe.CMD_SHIFT;this.packet.cmd=pe.types[r];let n=e&15,i=pe.requiredHeaderFlags[r];return i!=null&&n!==i?this._emitError(new Error(pe.requiredHeaderFlagsErrors[r])):(this.packet.retain=(e&pe.RETAIN_MASK)!==0,this.packet.qos=e>>pe.QOS_SHIFT&pe.QOS_MASK,this.packet.qos>2?this._emitError(new Error("Packet must not have both QoS bits set to 1")):(this.packet.dup=(e&pe.DUP_MASK)!==0,ae("_parseHeader: packet: %o",this.packet),this._list.consume(1),!0))}_parseLength(){let e=this._parseVarByteNum(!0);return e&&(this.packet.length=e.value,this._list.consume(e.bytes)),ae("_parseLength %d",e.value),!!e}_parsePayload(){ae("_parsePayload: payload %O",this._list);let e=!1;if(this.packet.length===0||this._list.length>=this.packet.length){switch(this._pos=0,this.packet.cmd){case"connect":this._parseConnect();break;case"connack":this._parseConnack();break;case"publish":this._parsePublish();break;case"puback":case"pubrec":case"pubrel":case"pubcomp":this._parseConfirmation();break;case"subscribe":this._parseSubscribe();break;case"suback":this._parseSuback();break;case"unsubscribe":this._parseUnsubscribe();break;case"unsuback":this._parseUnsuback();break;case"pingreq":case"pingresp":break;case"disconnect":this._parseDisconnect();break;case"auth":this._parseAuth();break;default:this._emitError(new Error("Not supported"))}e=!0}return ae("_parsePayload complete result: %s",e),e}_parseConnect(){ae("_parseConnect");let e,r,n,i,s={},o=this.packet,a=this._parseString();if(a===null)return this._emitError(new Error("Cannot parse protocolId"));if(a!=="MQTT"&&a!=="MQIsdp")return this._emitError(new Error("Invalid protocolId"));if(o.protocolId=a,this._pos>=this._list.length)return this._emitError(new Error("Packet too short"));if(o.protocolVersion=this._list.readUInt8(this._pos),o.protocolVersion>=128&&(o.bridgeMode=!0,o.protocolVersion=o.protocolVersion-128),o.protocolVersion!==3&&o.protocolVersion!==4&&o.protocolVersion!==5)return this._emitError(new Error("Invalid protocol version"));if(this._pos++,this._pos>=this._list.length)return this._emitError(new Error("Packet too short"));if(this._list.readUInt8(this._pos)&1)return this._emitError(new Error("Connect flag bit 0 must be 0, but got 1"));s.username=this._list.readUInt8(this._pos)&pe.USERNAME_MASK,s.password=this._list.readUInt8(this._pos)&pe.PASSWORD_MASK,s.will=this._list.readUInt8(this._pos)&pe.WILL_FLAG_MASK;let c=!!(this._list.readUInt8(this._pos)&pe.WILL_RETAIN_MASK),f=(this._list.readUInt8(this._pos)&pe.WILL_QOS_MASK)>>pe.WILL_QOS_SHIFT;if(s.will)o.will={},o.will.retain=c,o.will.qos=f;else{if(c)return this._emitError(new Error("Will Retain Flag must be set to zero when Will Flag is set to 0"));if(f)return this._emitError(new Error("Will QoS must be set to zero when Will Flag is set to 0"))}if(o.clean=(this._list.readUInt8(this._pos)&pe.CLEAN_SESSION_MASK)!==0,this._pos++,o.keepalive=this._parseNum(),o.keepalive===-1)return this._emitError(new Error("Packet too short"));if(o.protocolVersion===5){let d=this._parseProperties();Object.getOwnPropertyNames(d).length&&(o.properties=d)}let h=this._parseString();if(h===null)return this._emitError(new Error("Packet too short"));if(o.clientId=h,ae("_parseConnect: packet.clientId: %s",o.clientId),s.will){if(o.protocolVersion===5){let d=this._parseProperties();Object.getOwnPropertyNames(d).length&&(o.will.properties=d)}if(e=this._parseString(),e===null)return this._emitError(new Error("Cannot parse will topic"));if(o.will.topic=e,ae("_parseConnect: packet.will.topic: %s",o.will.topic),r=this._parseBuffer(),r===null)return this._emitError(new Error("Cannot parse will payload"));o.will.payload=r,ae("_parseConnect: packet.will.paylaod: %s",o.will.payload)}if(s.username){if(i=this._parseString(),i===null)return this._emitError(new Error("Cannot parse username"));o.username=i,ae("_parseConnect: packet.username: %s",o.username)}if(s.password){if(n=this._parseBuffer(),n===null)return this._emitError(new Error("Cannot parse password"));o.password=n}return this.settings=o,ae("_parseConnect: complete"),o}_parseConnack(){ae("_parseConnack");let e=this.packet;if(this._list.length<1)return null;let r=this._list.readUInt8(this._pos++);if(r>1)return this._emitError(new Error("Invalid connack flags, bits 7-1 must be set to 0"));if(e.sessionPresent=!!(r&pe.SESSIONPRESENT_MASK),this.settings.protocolVersion===5)this._list.length>=2?e.reasonCode=this._list.readUInt8(this._pos++):e.reasonCode=0;else{if(this._list.length<2)return null;e.returnCode=this._list.readUInt8(this._pos++)}if(e.returnCode===-1||e.reasonCode===-1)return this._emitError(new Error("Cannot parse return code"));if(this.settings.protocolVersion===5){let n=this._parseProperties();Object.getOwnPropertyNames(n).length&&(e.properties=n)}ae("_parseConnack: complete")}_parsePublish(){ae("_parsePublish");let e=this.packet;if(e.topic=this._parseString(),e.topic===null)return this._emitError(new Error("Cannot parse topic"));if(!(e.qos>0&&!this._parseMessageId())){if(this.settings.protocolVersion===5){let r=this._parseProperties();Object.getOwnPropertyNames(r).length&&(e.properties=r)}e.payload=this._list.slice(this._pos,e.length),ae("_parsePublish: payload from buffer list: %o",e.payload)}}_parseSubscribe(){ae("_parseSubscribe");let e=this.packet,r,n,i,s,o,a,c;if(e.subscriptions=[],!!this._parseMessageId()){if(this.settings.protocolVersion===5){let f=this._parseProperties();Object.getOwnPropertyNames(f).length&&(e.properties=f)}if(e.length<=0)return this._emitError(new Error("Malformed subscribe, no payload specified"));for(;this._pos<e.length;){if(r=this._parseString(),r===null)return this._emitError(new Error("Cannot parse topic"));if(this._pos>=e.length)return this._emitError(new Error("Malformed Subscribe Payload"));if(n=this._parseByte(),this.settings.protocolVersion===5){if(n&192)return this._emitError(new Error("Invalid subscribe topic flag bits, bits 7-6 must be 0"))}else if(n&252)return this._emitError(new Error("Invalid subscribe topic flag bits, bits 7-2 must be 0"));if(i=n&pe.SUBSCRIBE_OPTIONS_QOS_MASK,i>2)return this._emitError(new Error("Invalid subscribe QoS, must be <= 2"));if(a=(n>>pe.SUBSCRIBE_OPTIONS_NL_SHIFT&pe.SUBSCRIBE_OPTIONS_NL_MASK)!==0,o=(n>>pe.SUBSCRIBE_OPTIONS_RAP_SHIFT&pe.SUBSCRIBE_OPTIONS_RAP_MASK)!==0,s=n>>pe.SUBSCRIBE_OPTIONS_RH_SHIFT&pe.SUBSCRIBE_OPTIONS_RH_MASK,s>2)return this._emitError(new Error("Invalid retain handling, must be <= 2"));c={topic:r,qos:i},this.settings.protocolVersion===5?(c.nl=a,c.rap=o,c.rh=s):this.settings.bridgeMode&&(c.rh=0,c.rap=!0,c.nl=!0),ae("_parseSubscribe: push subscription `%s` to subscription",c),e.subscriptions.push(c)}}}_parseSuback(){ae("_parseSuback");let e=this.packet;if(this.packet.granted=[],!!this._parseMessageId()){if(this.settings.protocolVersion===5){let r=this._parseProperties();Object.getOwnPropertyNames(r).length&&(e.properties=r)}if(e.length<=0)return this._emitError(new Error("Malformed suback, no payload specified"));for(;this._pos<this.packet.length;){let r=this._list.readUInt8(this._pos++);if(this.settings.protocolVersion===5){if(!pe.MQTT5_SUBACK_CODES[r])return this._emitError(new Error("Invalid suback code"))}else if(r>2&&r!==128)return this._emitError(new Error("Invalid suback QoS, must be 0, 1, 2 or 128"));this.packet.granted.push(r)}}}_parseUnsubscribe(){ae("_parseUnsubscribe");let e=this.packet;if(e.unsubscriptions=[],!!this._parseMessageId()){if(this.settings.protocolVersion===5){let r=this._parseProperties();Object.getOwnPropertyNames(r).length&&(e.properties=r)}if(e.length<=0)return this._emitError(new Error("Malformed unsubscribe, no payload specified"));for(;this._pos<e.length;){let r=this._parseString();if(r===null)return this._emitError(new Error("Cannot parse topic"));ae("_parseUnsubscribe: push topic `%s` to unsubscriptions",r),e.unsubscriptions.push(r)}}}_parseUnsuback(){ae("_parseUnsuback");let e=this.packet;if(!this._parseMessageId())return this._emitError(new Error("Cannot parse messageId"));if((this.settings.protocolVersion===3||this.settings.protocolVersion===4)&&e.length!==2)return this._emitError(new Error("Malformed unsuback, payload length must be 2"));if(e.length<=0)return this._emitError(new Error("Malformed unsuback, no payload specified"));if(this.settings.protocolVersion===5){let r=this._parseProperties();for(Object.getOwnPropertyNames(r).length&&(e.properties=r),e.granted=[];this._pos<this.packet.length;){let n=this._list.readUInt8(this._pos++);if(!pe.MQTT5_UNSUBACK_CODES[n])return this._emitError(new Error("Invalid unsuback code"));this.packet.granted.push(n)}}}_parseConfirmation(){ae("_parseConfirmation: packet.cmd: `%s`",this.packet.cmd);let e=this.packet;if(this._parseMessageId(),this.settings.protocolVersion===5){if(e.length>2){switch(e.reasonCode=this._parseByte(),this.packet.cmd){case"puback":case"pubrec":if(!pe.MQTT5_PUBACK_PUBREC_CODES[e.reasonCode])return this._emitError(new Error("Invalid "+this.packet.cmd+" reason code"));break;case"pubrel":case"pubcomp":if(!pe.MQTT5_PUBREL_PUBCOMP_CODES[e.reasonCode])return this._emitError(new Error("Invalid "+this.packet.cmd+" reason code"));break}ae("_parseConfirmation: packet.reasonCode `%d`",e.reasonCode)}else e.reasonCode=0;if(e.length>3){let r=this._parseProperties();Object.getOwnPropertyNames(r).length&&(e.properties=r)}}return!0}_parseDisconnect(){let e=this.packet;if(ae("_parseDisconnect"),this.settings.protocolVersion===5){this._list.length>0?(e.reasonCode=this._parseByte(),pe.MQTT5_DISCONNECT_CODES[e.reasonCode]||this._emitError(new Error("Invalid disconnect reason code"))):e.reasonCode=0;let r=this._parseProperties();Object.getOwnPropertyNames(r).length&&(e.properties=r)}return ae("_parseDisconnect result: true"),!0}_parseAuth(){ae("_parseAuth");let e=this.packet;if(this.settings.protocolVersion!==5)return this._emitError(new Error("Not supported auth packet for this version MQTT"));if(e.reasonCode=this._parseByte(),!pe.MQTT5_AUTH_CODES[e.reasonCode])return this._emitError(new Error("Invalid auth reason code"));let r=this._parseProperties();return Object.getOwnPropertyNames(r).length&&(e.properties=r),ae("_parseAuth: result: true"),!0}_parseMessageId(){let e=this.packet;return e.messageId=this._parseNum(),e.messageId===null?(this._emitError(new Error("Cannot parse messageId")),!1):(ae("_parseMessageId: packet.messageId %d",e.messageId),!0)}_parseString(e){let r=this._parseNum(),n=r+this._pos;if(r===-1||n>this._list.length||n>this.packet.length)return null;let i=this._list.toString("utf8",this._pos,n);return this._pos+=r,ae("_parseString: result: %s",i),i}_parseStringPair(){return ae("_parseStringPair"),{name:this._parseString(),value:this._parseString()}}_parseBuffer(){let e=this._parseNum(),r=e+this._pos;if(e===-1||r>this._list.length||r>this.packet.length)return null;let n=this._list.slice(this._pos,r);return this._pos+=e,ae("_parseBuffer: result: %o",n),n}_parseNum(){if(this._list.length-this._pos<2)return-1;let e=this._list.readUInt16BE(this._pos);return this._pos+=2,ae("_parseNum: result: %s",e),e}_parse4ByteNum(){if(this._list.length-this._pos<4)return-1;let e=this._list.readUInt32BE(this._pos);return this._pos+=4,ae("_parse4ByteNum: result: %s",e),e}_parseVarByteNum(e){ae("_parseVarByteNum");let r=4,n=0,i=1,s=0,o=!1,a,c=this._pos?this._pos:0;for(;n<r&&c+n<this._list.length;){if(a=this._list.readUInt8(c+n++),s+=i*(a&pe.VARBYTEINT_MASK),i*=128,(a&pe.VARBYTEINT_FIN_MASK)===0){o=!0;break}if(this._list.length<=n)break}return!o&&n===r&&this._list.length>=n&&this._emitError(new Error("Invalid variable byte integer")),c&&(this._pos+=n),o?e?o={bytes:n,value:s}:o=s:o=!1,ae("_parseVarByteNum: result: %o",o),o}_parseByte(){let e;return this._pos<this._list.length&&(e=this._list.readUInt8(this._pos),this._pos++),ae("_parseByte: result: %o",e),e}_parseByType(e){switch(ae("_parseByType: type: %s",e),e){case"byte":return this._parseByte()!==0;case"int8":return this._parseByte();case"int16":return this._parseNum();case"int32":return this._parse4ByteNum();case"var":return this._parseVarByteNum();case"string":return this._parseString();case"pair":return this._parseStringPair();case"binary":return this._parseBuffer()}}_parseProperties(){ae("_parseProperties");let e=this._parseVarByteNum(),n=this._pos+e,i={};for(;this._pos<n;){let s=this._parseByte();if(!s)return this._emitError(new Error("Cannot parse property code type")),!1;let o=pe.propertiesCodes[s];if(!o)return this._emitError(new Error("Unknown property")),!1;if(o==="userProperties"){i[o]||(i[o]=Object.create(null));let a=this._parseByType(pe.propertiesTypes[o]);if(i[o][a.name])if(Array.isArray(i[o][a.name]))i[o][a.name].push(a.value);else{let c=i[o][a.name];i[o][a.name]=[c],i[o][a.name].push(a.value)}else i[o][a.name]=a.value;continue}i[o]?Array.isArray(i[o])?i[o].push(this._parseByType(pe.propertiesTypes[o])):(i[o]=[i[o]],i[o].push(this._parseByType(pe.propertiesTypes[o]))):i[o]=this._parseByType(pe.propertiesTypes[o])}return i}_newPacket(){return ae("_newPacket"),this.packet&&(this._list.consume(this.packet.length),ae("_newPacket: parser emit packet: packet.cmd: %s, packet.payload: %s, packet.length: %d",this.packet.cmd,this.packet.payload,this.packet.length),this.emit("packet",this.packet)),ae("_newPacket: new packet"),this.packet=new Fp,this._pos=0,!0}_emitError(e){ae("_emitError",e),this.error=e,this.emit("error",e)}};Wp.exports=Oa});var zp=j((xB,Gp)=>{A();x();I();var{Buffer:Hn}=(ke(),me(qe)),KS=65536,Hp={},QS=Hn.isBuffer(Hn.from([1,2]).subarray(0,1));function Vp(t){let e=Hn.allocUnsafe(2);return e.writeUInt8(t>>8,0),e.writeUInt8(t&255,1),e}function YS(){for(let t=0;t<KS;t++)Hp[t]=Vp(t)}function JS(t){let r=0,n=0,i=Hn.allocUnsafe(4);do r=t%128|0,t=t/128|0,t>0&&(r=r|128),i.writeUInt8(r,n++);while(t>0&&n<4);return t>0&&(n=0),QS?i.subarray(0,n):i.slice(0,n)}function XS(t){let e=Hn.allocUnsafe(4);return e.writeUInt32BE(t,0),e}Gp.exports={cache:Hp,generateCache:YS,generateNumber:Vp,genBufVariableByteInt:JS,generate4ByteBuffer:XS}});var Kp=j((BB,Ra)=>{"use strict";A();x();I();typeof N>"u"||!N.version||N.version.indexOf("v0.")===0||N.version.indexOf("v1.")===0&&N.version.indexOf("v1.8.")!==0?Ra.exports={nextTick:ZS}:Ra.exports=N;function ZS(t,e,r,n){if(typeof t!="function")throw new TypeError('"callback" argument must be a function');var i=arguments.length,s,o;switch(i){case 0:case 1:return N.nextTick(t);case 2:return N.nextTick(function(){t.call(null,e)});case 3:return N.nextTick(function(){t.call(null,e,r)});case 4:return N.nextTick(function(){t.call(null,e,r,n)});default:for(s=new Array(i-1),o=0;o<s.length;)s[o++]=arguments[o];return N.nextTick(function(){t.apply(null,s)})}}});var Ba=j((jB,ry)=>{A();x();I();var ue=Pa(),{Buffer:se}=(ke(),me(qe)),eE=se.allocUnsafe(0),tE=se.from([0]),Vn=zp(),rE=Kp().nextTick,rt=At()("mqtt-packet:writeToStream"),yo=Vn.cache,nE=Vn.generateNumber,iE=Vn.generateCache,ka=Vn.genBufVariableByteInt,oE=Vn.generate4ByteBuffer,He=Ca,go=!0;function ey(t,e,r){switch(rt("generate called"),e.cork&&(e.cork(),rE(sE,e)),go&&(go=!1,iE()),rt("generate: packet.cmd: %s",t.cmd),t.cmd){case"connect":return aE(t,e,r);case"connack":return uE(t,e,r);case"publish":return lE(t,e,r);case"puback":case"pubrec":case"pubrel":case"pubcomp":return cE(t,e,r);case"subscribe":return fE(t,e,r);case"suback":return hE(t,e,r);case"unsubscribe":return dE(t,e,r);case"unsuback":return pE(t,e,r);case"pingreq":case"pingresp":return yE(t,e,r);case"disconnect":return gE(t,e,r);case"auth":return bE(t,e,r);default:return e.destroy(new Error("Unknown command")),!1}}Object.defineProperty(ey,"cacheNumbers",{get(){return He===Ca},set(t){t?((!yo||Object.keys(yo).length===0)&&(go=!0),He=Ca):(go=!1,He=wE)}});function sE(t){t.uncork()}function aE(t,e,r){let n=t||{},i=n.protocolId||"MQTT",s=n.protocolVersion||4,o=n.will,a=n.clean,c=n.keepalive||0,f=n.clientId||"",h=n.username,d=n.password,m=n.properties;a===void 0&&(a=!0);let g=0;if(!i||typeof i!="string"&&!se.isBuffer(i))return e.destroy(new Error("Invalid protocolId")),!1;if(g+=i.length+2,s!==3&&s!==4&&s!==5)return e.destroy(new Error("Invalid protocol version")),!1;if(g+=1,(typeof f=="string"||se.isBuffer(f))&&(f||s>=4)&&(f||a))g+=se.byteLength(f)+2;else{if(s<4)return e.destroy(new Error("clientId must be supplied before 3.1.1")),!1;if(a*1===0)return e.destroy(new Error("clientId must be given if cleanSession set to 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The message is skipped and removed.",o.messageId),i())};this.log("connect :: sending queued packets"),i()}),this.on("close",()=>{this.log("close :: connected set to `false`"),this.connected=!1,this.log("close :: clearing connackTimer"),clearTimeout(this.connackTimer),this._destroyKeepaliveManager(),this.topicAliasRecv&&this.topicAliasRecv.clear(),this.log("close :: calling _setupReconnect"),this._setupReconnect()}),this.options.manualConnect||(this.log("MqttClient :: setting up stream"),this.connect())}handleAuth(e,r){r()}handleMessage(e,r){r()}_nextId(){return this.messageIdProvider.allocate()}getLastMessageId(){return this.messageIdProvider.getLastAllocated()}connect(){let e=new $A.Writable,r=Fu.default.parser(this.options),n=null,i=[];this.log("connect :: calling method to clear reconnect"),this._clearReconnect(),this.disconnected&&!this.reconnecting&&(this.incomingStore=this.options.incomingStore||new vn.default,this.outgoingStore=this.options.outgoingStore||new vn.default,this.disconnecting=!1,this.disconnected=!1),this.log("connect :: using streamBuilder provided to client to create stream"),this.stream=this.streamBuilder(this),r.on("packet",f=>{this.log("parser :: on packet push to packets array."),i.push(f)});let s=()=>{this.log("work :: getting next packet in queue");let f=i.shift();if(f)this.log("work :: packet pulled from queue"),(0,VA.default)(this,f,o);else{this.log("work :: no packets in queue");let h=n;n=null,this.log("work :: done flag is %s",!!h),h&&h()}},o=()=>{if(i.length)(0,bi.nextTick)(s);else{let f=n;n=null,f()}};e._write=(f,h,d)=>{n=d,this.log("writable stream :: parsing buffer"),r.parse(f),s()};let a=f=>{this.log("streamErrorHandler :: error",f.message),f.code?(this.log("streamErrorHandler :: emitting error"),this.emit("error",f)):this.noop(f)};this.log("connect :: pipe stream to writable stream"),this.stream.pipe(e),this.stream.on("error",a),this.stream.on("close",()=>{this.log("(%s)stream :: on close",this.options.clientId),this._flushVolatile(),this.log("stream: emit close to MqttClient"),this.emit("close")}),this.log("connect: sending packet `connect`");let c={cmd:"connect",protocolId:this.options.protocolId,protocolVersion:this.options.protocolVersion,clean:this.options.clean,clientId:this.options.clientId,keepalive:this.options.keepalive,username:this.options.username,password:this.options.password,properties:this.options.properties};if(this.options.will&&(c.will={...this.options.will,payload:this.options.will?.payload}),this.topicAliasRecv&&(c.properties||(c.properties={}),this.topicAliasRecv&&(c.properties.topicAliasMaximum=this.topicAliasRecv.max)),this._writePacket(c),r.on("error",this.emit.bind(this,"error")),this.options.properties){if(!this.options.properties.authenticationMethod&&this.options.properties.authenticationData)return this.end(()=>this.emit("error",new Error("Packet has no Authentication Method"))),this;if(this.options.properties.authenticationMethod&&this.options.authPacket&&typeof this.options.authPacket=="object"){let f={cmd:"auth",reasonCode:0,...this.options.authPacket};this._writePacket(f)}}return this.stream.setMaxListeners(1e3),clearTimeout(this.connackTimer),this.connackTimer=setTimeout(()=>{this.log("!!connectTimeout hit!! 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%s",!!n),(!n||typeof n!="function")&&(n=this.noop);let i=()=>{this.log("end :: closeStores: closing incoming and outgoing stores"),this.disconnected=!0,this.incomingStore.close(o=>{this.outgoingStore.close(a=>{if(this.log("end :: closeStores: emitting end"),this.emit("end"),n){let c=o||a;this.log("end :: closeStores: invoking callback with args"),n(c)}})}),this._deferredReconnect?this._deferredReconnect():(this.options.reconnectPeriod===0||this.options.manualConnect)&&(this.disconnecting=!1)},s=()=>{this.log("end :: (%s) :: finish :: calling _cleanUp with force %s",this.options.clientId,e),this._cleanUp(e,()=>{this.log("end :: finish :: calling process.nextTick on closeStores"),(0,bi.nextTick)(i)},r)};return this.disconnecting?(n(),this):(this._clearReconnect(),this.disconnecting=!0,!e&&Object.keys(this.outgoing).length>0?(this.log("end :: (%s) :: calling finish in 10ms once outgoing is empty",this.options.clientId),this.once("outgoingEmpty",setTimeout.bind(null,s,10))):(this.log("end :: (%s) :: immediately calling finish",this.options.clientId),s()),this)}endAsync(e,r){return new Promise((n,i)=>{this.end(e,r,s=>{s?i(s):n()})})}removeOutgoingMessage(e){if(this.outgoing[e]){let{cb:r}=this.outgoing[e];this._removeOutgoingAndStoreMessage(e,()=>{r(new Error("Message removed"))})}return this}reconnect(e){this.log("client reconnect");let r=()=>{e?(this.options.incomingStore=e.incomingStore,this.options.outgoingStore=e.outgoingStore):(this.options.incomingStore=null,this.options.outgoingStore=null),this.incomingStore=this.options.incomingStore||new vn.default,this.outgoingStore=this.options.outgoingStore||new vn.default,this.disconnecting=!1,this.disconnected=!1,this._deferredReconnect=null,this._reconnect()};return this.disconnecting&&!this.disconnected?this._deferredReconnect=r:r(),this}_flushVolatile(){this.outgoing&&(this.log("_flushVolatile :: deleting volatile messages from the queue and setting their callbacks as error function"),Object.keys(this.outgoing).forEach(e=>{this.outgoing[e].volatile&&typeof this.outgoing[e].cb=="function"&&(this.outgoing[e].cb(new Error("Connection closed")),delete this.outgoing[e])}))}_flush(){this.outgoing&&(this.log("_flush: queue exists? %b",!!this.outgoing),Object.keys(this.outgoing).forEach(e=>{typeof this.outgoing[e].cb=="function"&&(this.outgoing[e].cb(new Error("Connection closed")),delete this.outgoing[e])}))}_removeTopicAliasAndRecoverTopicName(e){let r;e.properties&&(r=e.properties.topicAlias);let n=e.topic.toString();if(this.log("_removeTopicAliasAndRecoverTopicName :: alias %d, topic %o",r,n),n.length===0){if(typeof r>"u")return new Error("Unregistered Topic Alias");if(n=this.topicAliasSend.getTopicByAlias(r),typeof n>"u")return new Error("Unregistered Topic Alias");e.topic=n}r&&delete e.properties.topicAlias}_checkDisconnecting(e){return this.disconnecting&&(e&&e!==this.noop?e(new Error("client disconnecting")):this.emit("error",new Error("client disconnecting"))),this.disconnecting}_reconnect(){this.log("_reconnect: emitting reconnect to client"),this.emit("reconnect"),this.connected?(this.end(()=>{this.connect()}),this.log("client already connected. disconnecting first.")):(this.log("_reconnect: calling connect"),this.connect())}_setupReconnect(){!this.disconnecting&&!this.reconnectTimer&&this.options.reconnectPeriod>0?(this.reconnecting||(this.log("_setupReconnect :: emit `offline` state"),this.emit("offline"),this.log("_setupReconnect :: set `reconnecting` to `true`"),this.reconnecting=!0),this.log("_setupReconnect :: setting reconnectTimer for %d ms",this.options.reconnectPeriod),this.reconnectTimer=setInterval(()=>{this.log("reconnectTimer :: reconnect triggered!"),this._reconnect()},this.options.reconnectPeriod)):this.log("_setupReconnect :: doing nothing...")}_clearReconnect(){this.log("_clearReconnect : clearing reconnect timer"),this.reconnectTimer&&(clearInterval(this.reconnectTimer),this.reconnectTimer=null)}_cleanUp(e,r,n={}){if(r&&(this.log("_cleanUp :: done callback provided for on stream close"),this.stream.on("close",r)),this.log("_cleanUp :: forced? %s",e),e)this.options.reconnectPeriod===0&&this.options.clean&&this._flush(),this.log("_cleanUp :: (%s) :: destroying stream",this.options.clientId),this.stream.destroy();else{let i={cmd:"disconnect",...n};this.log("_cleanUp :: (%s) :: call _sendPacket with disconnect packet",this.options.clientId),this._sendPacket(i,()=>{this.log("_cleanUp :: (%s) :: destroying stream",this.options.clientId),Wu(()=>{this.stream.end(()=>{this.log("_cleanUp :: (%s) :: stream destroyed",this.options.clientId)})})})}!this.disconnecting&&!this.reconnecting&&(this.log("_cleanUp :: client not disconnecting/reconnecting. 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+/*! Bundled license information:
+
+@jspm/core/nodelibs/browser/chunk-DtuTasat.js:
+  (*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> *)
+
+safe-buffer/index.js:
+  (*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> *)
+
+@babel/runtime/helpers/regenerator.js:
+  (*! regenerator-runtime -- Copyright (c) 2014-present, Facebook, Inc. -- license (MIT): https://github.com/babel/babel/blob/main/packages/babel-helpers/LICENSE *)
+*/
diff --git a/mqtt-backend/node_modules/mqtt/help/help.txt b/mqtt-backend/node_modules/mqtt/help/help.txt
new file mode 100644
index 0000000..55473e3
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt/help/help.txt
@@ -0,0 +1,8 @@
+MQTT.js command line interface, available commands are:
+
+  * publish     publish a message to the broker
+  * subscribe   subscribe for updates from the broker
+  * version     the current MQTT.js version
+  * help        help about commands
+
+Launch 'mqtt help [command]' to know more about the commands.
diff --git a/mqtt-backend/node_modules/mqtt/help/publish.txt b/mqtt-backend/node_modules/mqtt/help/publish.txt
new file mode 100644
index 0000000..5839898
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt/help/publish.txt
@@ -0,0 +1,26 @@
+Usage: mqtt publish [opts] topic [message]
+
+Available options:
+
+  -h/--hostname HOST    the broker host
+  -p/--port PORT        the broker port
+  -i/--client-id ID     the client id
+  -q/--qos 0/1/2        the QoS of the message
+  -t/--topic TOPIC      the message topic
+  -m/--message MSG      the message body
+  -r/--retain           send a retained message
+  -s/--stdin            read the message body from stdin
+  -M/--multiline        read lines from stdin as multiple messages 
+  -u/--username USER    the username
+  -P/--password PASS    the password
+  -C/--protocol PROTO   the protocol to use, 'mqtt',
+                        'mqtts', 'ws' or 'wss'
+  --key PATH            path to the key file
+  --cert PATH           path to the cert file
+  --ca PATH             path to the ca certificate
+  --insecure            do not verify the server certificate
+  --will-topic TOPIC    the will topic
+  --will-payload BODY   the will message
+  --will-qos 0/1/2      the will qos
+  --will-retain         send a will retained message 
+  -H/--help             show this
diff --git a/mqtt-backend/node_modules/mqtt/help/subscribe.txt b/mqtt-backend/node_modules/mqtt/help/subscribe.txt
new file mode 100644
index 0000000..c02316f
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt/help/subscribe.txt
@@ -0,0 +1,26 @@
+Usage: mqtt subscribe [opts] [topic]
+
+Available options:
+
+  -h/--hostname HOST    the broker host
+  -p/--port PORT        the broker port
+  -i/--clientId ID      the client id
+  -q/--qos 0/1/2        the QoS of the message
+  --no-clean            do not discard any pending message for
+                        the given id
+  -t/--topic TOPIC      the message topic
+  -k/--keepalive SEC    send a ping every SEC seconds
+  -u/--username USER    the username
+  -P/--password PASS    the password
+  -l/--protocol PROTO   the protocol to use, 'mqtt',
+                        'mqtts', 'ws' or 'wss'
+  --key PATH            path to the key file
+  --cert PATH           path to the cert file
+  --ca PATH             path to the ca certificate
+  --insecure            do not verify the server certificate
+  --will-topic TOPIC    the will topic
+  --will-message BODY   the will message
+  --will-qos 0/1/2      the will qos
+  --will-retain         send a will retained message
+  -v/--verbose          print the topic before the message
+  -H/--help             show this
diff --git a/mqtt-backend/node_modules/mqtt/package.json b/mqtt-backend/node_modules/mqtt/package.json
new file mode 100644
index 0000000..e593529
--- /dev/null
+++ b/mqtt-backend/node_modules/mqtt/package.json
@@ -0,0 +1,165 @@
+{
+  "name": "mqtt",
+  "description": "A library for the MQTT protocol",
+  "version": "5.15.1",
+  "contributors": [
+    "Adam Rudd <adamvrr@gmail.com>",
+    "Matteo Collina <matteo.collina@gmail.com> (https://github.com/mcollina)",
+    "Siarhei Buntsevich <scarry0506@gmail.com> (https://github.com/scarry1992)",
+    "Yoseph Maguire <yomaguir@microsoft.com> (https://github.com/YoDaMa)",
+    "Daniel Lando <daniel.sorridi@gmail.com> (https://github.com/robertsLando)"
+  ],
+  "keywords": [
+    "mqtt",
+    "publish/subscribe",
+    "publish",
+    "subscribe"
+  ],
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/mqttjs/MQTT.js.git"
+  },
+  "main": "./build/index.js",
+  "module": "./dist/mqtt.esm.js",
+  "bin": {
+    "mqtt_pub": "./build/bin/pub.js",
+    "mqtt_sub": "./build/bin/sub.js",
+    "mqtt": "./build/bin/mqtt.js"
+  },
+  "files": [
+    "dist/",
+    "CONTRIBUTING.md",
+    "LICENSE.md",
+    "help/",
+    "build/"
+  ],
+  "exports": {
+    ".": {
+      "react-native": "./dist/mqtt.esm.js",
+      "browser": {
+        "import": "./dist/mqtt.esm.js",
+        "default": "./dist/mqtt.min.js"
+      },
+      "default": "./build/index.js"
+    },
+    "./package.json": "./package.json",
+    "./*.map": "./build/*.js.map",
+    "./dist/*": "./dist/*.js",
+    "./*": "./build/*.js"
+  },
+  "types": "build/index.d.ts",
+  "typesVersions": {
+    "*": {
+      "*": [
+        "./build/index.d.ts"
+      ]
+    }
+  },
+  "scripts": {
+    "lint": "eslint --ext .ts .",
+    "lint-fix": "eslint --fix --ext .ts .",
+    "build:ts": "rimraf build/ && tsc -p tsconfig.build.json",
+    "build:browser": "node esbuild.js",
+    "build": "npm run build:ts && npm run build:browser",
+    "prepare": "npm run build",
+    "unit-test:node": "node -r esbuild-register --test-concurrency 4 --test-reporter=junit --test-reporter-destination=junit.xml --test-reporter=spec --test-reporter-destination=stdout --test test/node/*.ts ",
+    "unit-test:browser": "wtr",
+    "test:node": "node_modules/.bin/nyc npm run unit-test:node",
+    "test:browser": "npm run build && npm run unit-test:browser",
+    "test": "npm run test:node",
+    "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s && git add CHANGELOG.md",
+    "changelog-init": "conventional-changelog -p angular -i CHANGELOG.md -s -r 0",
+    "release": "read -p 'GITHUB_TOKEN: ' GITHUB_TOKEN && export GITHUB_TOKEN=$GITHUB_TOKEN && release-it"
+  },
+  "publishConfig": {
+    "registry": "https://registry.npmjs.org",
+    "provenance": true
+  },
+  "pre-commit": [
+    "lint"
+  ],
+  "engines": {
+    "node": ">=16.0.0"
+  },
+  "browser": {
+    "./mqtt.js": "./dist/mqtt.js",
+    "fs": false,
+    "tls": false,
+    "net": false
+  },
+  "dependencies": {
+    "@types/readable-stream": "^4.0.21",
+    "@types/ws": "^8.18.1",
+    "commist": "^3.2.0",
+    "concat-stream": "^2.0.0",
+    "debug": "^4.4.1",
+    "help-me": "^5.0.0",
+    "lru-cache": "^10.4.3",
+    "minimist": "^1.2.8",
+    "mqtt-packet": "^9.0.2",
+    "number-allocator": "^1.0.14",
+    "readable-stream": "^4.7.0",
+    "rfdc": "^1.4.1",
+    "socks": "^2.8.6",
+    "split2": "^4.2.0",
+    "worker-timers": "^8.0.23",
+    "ws": "^8.18.3"
+  },
+  "overrides": {
+    "levelup": {
+      "bl": "1.2.3",
+      "semver": "5.7.2"
+    },
+    "pre-commit": {
+      "cross-spawn": "7.0.6"
+    },
+    "release-it": {
+      "undici": "7.24.5"
+    }
+  },
+  "devDependencies": {
+    "@eslint/eslintrc": "^3.3.1",
+    "@eslint/js": "^9.32.0",
+    "@esm-bundle/chai": "^4.3.4",
+    "@release-it/conventional-changelog": "^10.0.1",
+    "@tsconfig/node20": "^20.1.6",
+    "@types/chai": "^5.2.2",
+    "@types/node": "^20.17.16",
+    "@types/sinon": "^17.0.4",
+    "@types/tape": "^5.8.1",
+    "@typescript-eslint/eslint-plugin": "^8.38.0",
+    "@typescript-eslint/parser": "^8.38.0",
+    "@web/test-runner": "^0.20.2",
+    "@web/test-runner-playwright": "^0.11.1",
+    "aedes-cli": "^0.8.0",
+    "chai": "^5.2.1",
+    "chokidar": "^4.0.3",
+    "conventional-changelog-cli": "^5.0.0",
+    "end-of-stream": "^1.4.5",
+    "esbuild": "^0.25.8",
+    "esbuild-plugin-polyfill-node": "^0.3.0",
+    "esbuild-register": "^3.6.0",
+    "eslint": "^9.32.0",
+    "eslint-config-prettier": "^10.1.8",
+    "eslint-plugin-import": "^2.32.0",
+    "eslint-plugin-prettier": "^5.5.3",
+    "global": "^4.4.0",
+    "globals": "^16.3.0",
+    "leaked-handles": "^5.2.0",
+    "mkdirp": "^3.0.1",
+    "mqtt-connection": "^4.1.0",
+    "mqtt-level-store": "^3.1.0",
+    "nyc": "^17.1.0",
+    "pre-commit": "^1.2.2",
+    "prettier": "^3.6.2",
+    "release-it": "^19.0.4",
+    "rimraf": "^6.0.1",
+    "should": "^13.2.3",
+    "sinon": "^17.0.2",
+    "snazzy": "^9.0.0",
+    "tape": "^5.9.0",
+    "ts-node": "^10.9.2",
+    "typescript": "^5.8.3"
+  }
+}
diff --git a/mqtt-backend/node_modules/ms/index.js b/mqtt-backend/node_modules/ms/index.js
new file mode 100644
index 0000000..ea734fb
--- /dev/null
+++ b/mqtt-backend/node_modules/ms/index.js
@@ -0,0 +1,162 @@
+/**
+ * Helpers.
+ */
+
+var s = 1000;
+var m = s * 60;
+var h = m * 60;
+var d = h * 24;
+var w = d * 7;
+var y = d * 365.25;
+
+/**
+ * Parse or format the given `val`.
+ *
+ * Options:
+ *
+ *  - `long` verbose formatting [false]
+ *
+ * @param {String|Number} val
+ * @param {Object} [options]
+ * @throws {Error} throw an error if val is not a non-empty string or a number
+ * @return {String|Number}
+ * @api public
+ */
+
+module.exports = function (val, options) {
+  options = options || {};
+  var type = typeof val;
+  if (type === 'string' && val.length > 0) {
+    return parse(val);
+  } else if (type === 'number' && isFinite(val)) {
+    return options.long ? fmtLong(val) : fmtShort(val);
+  }
+  throw new Error(
+    'val is not a non-empty string or a valid number. val=' +
+      JSON.stringify(val)
+  );
+};
+
+/**
+ * Parse the given `str` and return milliseconds.
+ *
+ * @param {String} str
+ * @return {Number}
+ * @api private
+ */
+
+function parse(str) {
+  str = String(str);
+  if (str.length > 100) {
+    return;
+  }
+  var match = /^(-?(?:\d+)?\.?\d+) *(milliseconds?|msecs?|ms|seconds?|secs?|s|minutes?|mins?|m|hours?|hrs?|h|days?|d|weeks?|w|years?|yrs?|y)?$/i.exec(
+    str
+  );
+  if (!match) {
+    return;
+  }
+  var n = parseFloat(match[1]);
+  var type = (match[2] || 'ms').toLowerCase();
+  switch (type) {
+    case 'years':
+    case 'year':
+    case 'yrs':
+    case 'yr':
+    case 'y':
+      return n * y;
+    case 'weeks':
+    case 'week':
+    case 'w':
+      return n * w;
+    case 'days':
+    case 'day':
+    case 'd':
+      return n * d;
+    case 'hours':
+    case 'hour':
+    case 'hrs':
+    case 'hr':
+    case 'h':
+      return n * h;
+    case 'minutes':
+    case 'minute':
+    case 'mins':
+    case 'min':
+    case 'm':
+      return n * m;
+    case 'seconds':
+    case 'second':
+    case 'secs':
+    case 'sec':
+    case 's':
+      return n * s;
+    case 'milliseconds':
+    case 'millisecond':
+    case 'msecs':
+    case 'msec':
+    case 'ms':
+      return n;
+    default:
+      return undefined;
+  }
+}
+
+/**
+ * Short format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */
+
+function fmtShort(ms) {
+  var msAbs = Math.abs(ms);
+  if (msAbs >= d) {
+    return Math.round(ms / d) + 'd';
+  }
+  if (msAbs >= h) {
+    return Math.round(ms / h) + 'h';
+  }
+  if (msAbs >= m) {
+    return Math.round(ms / m) + 'm';
+  }
+  if (msAbs >= s) {
+    return Math.round(ms / s) + 's';
+  }
+  return ms + 'ms';
+}
+
+/**
+ * Long format for `ms`.
+ *
+ * @param {Number} ms
+ * @return {String}
+ * @api private
+ */
+
+function fmtLong(ms) {
+  var msAbs = Math.abs(ms);
+  if (msAbs >= d) {
+    return plural(ms, msAbs, d, 'day');
+  }
+  if (msAbs >= h) {
+    return plural(ms, msAbs, h, 'hour');
+  }
+  if (msAbs >= m) {
+    return plural(ms, msAbs, m, 'minute');
+  }
+  if (msAbs >= s) {
+    return plural(ms, msAbs, s, 'second');
+  }
+  return ms + ' ms';
+}
+
+/**
+ * Pluralization helper.
+ */
+
+function plural(ms, msAbs, n, name) {
+  var isPlural = msAbs >= n * 1.5;
+  return Math.round(ms / n) + ' ' + name + (isPlural ? 's' : '');
+}
diff --git a/mqtt-backend/node_modules/ms/license.md b/mqtt-backend/node_modules/ms/license.md
new file mode 100644
index 0000000..fa5d39b
--- /dev/null
+++ b/mqtt-backend/node_modules/ms/license.md
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2020 Vercel, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/ms/package.json b/mqtt-backend/node_modules/ms/package.json
new file mode 100644
index 0000000..4997189
--- /dev/null
+++ b/mqtt-backend/node_modules/ms/package.json
@@ -0,0 +1,38 @@
+{
+  "name": "ms",
+  "version": "2.1.3",
+  "description": "Tiny millisecond conversion utility",
+  "repository": "vercel/ms",
+  "main": "./index",
+  "files": [
+    "index.js"
+  ],
+  "scripts": {
+    "precommit": "lint-staged",
+    "lint": "eslint lib/* bin/*",
+    "test": "mocha tests.js"
+  },
+  "eslintConfig": {
+    "extends": "eslint:recommended",
+    "env": {
+      "node": true,
+      "es6": true
+    }
+  },
+  "lint-staged": {
+    "*.js": [
+      "npm run lint",
+      "prettier --single-quote --write",
+      "git add"
+    ]
+  },
+  "license": "MIT",
+  "devDependencies": {
+    "eslint": "4.18.2",
+    "expect.js": "0.3.1",
+    "husky": "0.14.3",
+    "lint-staged": "5.0.0",
+    "mocha": "4.0.1",
+    "prettier": "2.0.5"
+  }
+}
diff --git a/mqtt-backend/node_modules/ms/readme.md b/mqtt-backend/node_modules/ms/readme.md
new file mode 100644
index 0000000..0fc1abb
--- /dev/null
+++ b/mqtt-backend/node_modules/ms/readme.md
@@ -0,0 +1,59 @@
+# ms
+
+![CI](https://github.com/vercel/ms/workflows/CI/badge.svg)
+
+Use this package to easily convert various time formats to milliseconds.
+
+## Examples
+
+```js
+ms('2 days')  // 172800000
+ms('1d')      // 86400000
+ms('10h')     // 36000000
+ms('2.5 hrs') // 9000000
+ms('2h')      // 7200000
+ms('1m')      // 60000
+ms('5s')      // 5000
+ms('1y')      // 31557600000
+ms('100')     // 100
+ms('-3 days') // -259200000
+ms('-1h')     // -3600000
+ms('-200')    // -200
+```
+
+### Convert from Milliseconds
+
+```js
+ms(60000)             // "1m"
+ms(2 * 60000)         // "2m"
+ms(-3 * 60000)        // "-3m"
+ms(ms('10 hours'))    // "10h"
+```
+
+### Time Format Written-Out
+
+```js
+ms(60000, { long: true })             // "1 minute"
+ms(2 * 60000, { long: true })         // "2 minutes"
+ms(-3 * 60000, { long: true })        // "-3 minutes"
+ms(ms('10 hours'), { long: true })    // "10 hours"
+```
+
+## Features
+
+- Works both in [Node.js](https://nodejs.org) and in the browser
+- If a number is supplied to `ms`, a string with a unit is returned
+- If a string that contains the number is supplied, it returns it as a number (e.g.: it returns `100` for `'100'`)
+- If you pass a string with a number and a valid unit, the number of equivalent milliseconds is returned
+
+## Related Packages
+
+- [ms.macro](https://github.com/knpwrs/ms.macro) - Run `ms` as a macro at build-time.
+
+## Caught a Bug?
+
+1. [Fork](https://help.github.com/articles/fork-a-repo/) this repository to your own GitHub account and then [clone](https://help.github.com/articles/cloning-a-repository/) it to your local device
+2. Link the package to the global module directory: `npm link`
+3. Within the module you want to test your local development instance of ms, just link it to the dependencies: `npm link ms`. Instead of the default one from npm, Node.js will now use your clone of ms!
+
+As always, you can run the tests using: `npm test`
diff --git a/mqtt-backend/node_modules/number-allocator/.github/workflows/nodejs.yml b/mqtt-backend/node_modules/number-allocator/.github/workflows/nodejs.yml
new file mode 100644
index 0000000..e14fec5
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/.github/workflows/nodejs.yml
@@ -0,0 +1,33 @@
+name: number-allocator CI
+
+on:
+  pull_request:
+    types: [opened, synchronize]
+  push:
+    branches:
+    - main
+    tags:
+    - '*'
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [14.x, 15.x, 16.x, 18.x, 19.x]
+      fail-fast: false
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm run typescript-test
+    - run: npm test && npm run codecov
+      env:
+        CI: true
+        DEBUG: "number-allocator*"
diff --git a/mqtt-backend/node_modules/number-allocator/CHANGELOG.md b/mqtt-backend/node_modules/number-allocator/CHANGELOG.md
new file mode 100644
index 0000000..6823f64
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/CHANGELOG.md
@@ -0,0 +1,47 @@
+## 1.0.14
+- Fixed README.md version.
+
+## 1.0.13
+- **Important** Fixed invalid free operator.
+- Updated js-sdsl.
+
+## 1.0.12
+- Updated js-sdsl. updateKeyByIterator() is used.
+
+## 1.0.11
+- Updated js-sdsl. Bidirectional iterator is used.
+
+## 1.0.10
+- Fixed TypeScript number type
+
+## 1.0.9
+- Migrated from collections.js to js-sdsl to remove intrinsic library extention
+
+## 1.0.8
+- Updated collections.js to solve https://github.com/montagejs/collections/issues/241
+
+## 1.0.7
+- Fixed codecov badge on README.md.
+
+## 1.0.6
+- Fixed document.
+- Added keywords.
+
+## 1.0.5
+- Added debug logs.
+- Improved free() with vacant value behavior.
+
+## 1.0.4
+- Fixed module export point again. `module.exports.NumberAllocator = NumberAllocator`
+
+## 1.0.3
+- Fixed module export point.
+
+## 1.0.2
+- Fixed npm version.
+
+## 1.0.1
+- Fixed .gitignore.
+
+## 1.0.0
+- Initial version.
diff --git a/mqtt-backend/node_modules/number-allocator/LICENSE b/mqtt-backend/node_modules/number-allocator/LICENSE
new file mode 100644
index 0000000..9f43a0b
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2021 Takatoshi Kondo
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/number-allocator/README.md b/mqtt-backend/node_modules/number-allocator/README.md
new file mode 100644
index 0000000..73d7455
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/README.md
@@ -0,0 +1,203 @@
+# Unique number allocator for JavaScript.
+
+Version 1.0.14 [![number-allocator CI](https://github.com/redboltz/number-allocator/workflows/number-allocator%20CI/badge.svg)](https://github.com/redboltz/number-allocator/actions) [![codecov](https://codecov.io/gh/redboltz/number-allocator/branch/main/graph/badge.svg)](https://codecov.io/gh/redboltz/number-allocator)
+
+## How to use
+
+```js
+const NumberAllocator = require('number-allocator').NumberAllocator
+
+// Construct a NumerAllocator that has [0-10] numbers.
+// All numbers are vacant.
+const a = new NumberAllocator(0, 10)
+
+// Allocate the least vacant number.
+const num0 = a.alloc()
+console.log(num0) // 0
+
+// Allocate the least vacant number.
+const num1 = a.alloc()
+console.log(num1) // 1
+
+// Use any vacant number.
+const ret1 = a.use(5) // 5 is marked as used(occupied) in the NumberAllocator.
+console.log(ret1) // true
+
+// If use the used number, then return false.
+const ret2 = a.use(1) // 1 has already been used, then return false
+console.log(ret2) // false
+
+// Free the used number.
+a.free(1)
+// Now 1 becomes vacant again.
+
+const ret3 = a.use(1)
+console.log(ret3) // true
+
+// Get the lowest vacant number without marking used.
+const num2 = a.firstVacant()
+console.log(num2) // 2
+
+// Clear all used mark. Now [0-10] are allocatable again.
+a.clear()
+```
+
+## Reference
+
+### NumberAllocator(min, max)
+Constructor
+
+- min: Number
+   - The maximum number of allocatable. The number must be integer.
+- max: Number
+   - The minimum number of allocatable. The number must be integer.
+
+The all numbers are set to vacant status.
+
+Time Complexity O(1)
+
+### firstVacant()
+Get the first vacant number. The status of the number is not updated.
+
+Time Complexity O(1)
+
+- return: Number
+   - The first vacant number. If all numbers are occupied, return null.
+     When alloc() is called then the same value will be allocated.
+
+### alloc()
+Allocate the first vacant number. The number become occupied status.
+
+Time Complexity O(1)
+
+- return: Number
+   - The first vacant number. If all numbers are occupied, return null.
+
+### use(num)
+Use the number. The number become occupied status.
+
+If the number has already been occupied, then return false.
+
+Time Complexity O(logN) : N is the number of intervals (not numbers)
+
+- num: Number
+   - The number to request use.
+- return: Boolean
+   - If `num` was not occupied, then return true, otherwise return false.
+
+### free(num)
+Deallocate the number. The number become vacant status.
+
+Time Complexity O(logN) : N is the number of intervals (not numbers)
+
+- num: Number
+   - The number to deallocate. The number must be occupied status.
+     In other words, the number must be allocated by alloc() or occupied be use().
+
+### clear()
+Clear all occupied numbers.
+The all numbers are set to vacant status.
+Time Complexity O(1)
+
+### intervalCount()
+Get the number of intervals. Interval is internal structure of this library.
+
+This function is for debugging.
+
+Time Complexity O(1)
+
+- return: Number
+   - The number of intervals.
+
+### dump()
+Dump the internal structor of the library.
+
+This function is for debugging.
+
+Time Complexity O(N) : N is the number of intervals (not numbers)
+
+## Internal structure
+NumberAllocator has a sorted-set of Interval.
+
+Interval has `low` and `high` property.
+
+I use `[low-high]` notation to describe Interval.
+
+When NumberAllocator is constructed, it has only one Interval(min, max).
+
+Let's say `new NumberAllocator(1, 9)` then the internal structure become as follows:
+
+```
+[1-------9]
+```
+
+When `alloc()` is called, the first Interval.low is returned.
+
+And then the interval is shrinked.
+
+```
+alloc()
+return 1
+ [2------9]
+```
+
+When `use(5)` is called, the interval is separated to the two intervals.
+
+```
+use(5)
+ [2-4] [6--9]
+```
+
+When `alloc()` is called again, the first Interval.low is returned.
+
+And then the interval is shrinked.
+
+```
+alloc()
+return 2
+  [3-4] [6--9]
+```
+
+When `free(1)` is called. the interval is inseted.
+
+```
+free(1)
+[1]  [3-4] [6--9]
+```
+
+When `free(2)` is called. the interval is inseted.
+
+And check the left and right intervals. If they are continuours, then concatinate to them.
+
+```
+free(1)
+[1][2][3-4] [6--9]
+[1-------4] [6--9]
+```
+
+When `clear()` is called, then reset the interval as follows:
+
+```
+[1-------9]
+```
+
+When `intervalCount()` is called, then the number of intervals is retuned.
+
+In the following case, return 3.
+
+```
+intervalCount()
+return 3
+[1]  [3-4] [6--9]
+```
+
+Interval management (insertion/concatination/shrinking) is using efficient way.
+Insert/Delete operation to sorted-set is minimized.
+Some of operations requires O(logN) time complexity. N is number of intervals.
+If the maximum count of allocatable values is M, N is at most floor((M + 1) / 2),
+
+In this example, M is 9 so N is at most 5 as follows:
+
+```
+[1] [3] [5] [7] [9]
+```
diff --git a/mqtt-backend/node_modules/number-allocator/index.js b/mqtt-backend/node_modules/number-allocator/index.js
new file mode 100644
index 0000000..ef1b30a
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/index.js
@@ -0,0 +1,7 @@
+// Copyright Takatoshi Kondo 2021
+//
+// Distributed under the MIT License
+
+const NumberAllocator = require('./lib/number-allocator.js')
+
+module.exports.NumberAllocator = NumberAllocator
diff --git a/mqtt-backend/node_modules/number-allocator/karma.conf.js b/mqtt-backend/node_modules/number-allocator/karma.conf.js
new file mode 100644
index 0000000..cff5776
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/karma.conf.js
@@ -0,0 +1,63 @@
+// Karma configuration
+// Generated on Sat Jan 30 2021 21:44:35 GMT+0900 (GMT+09:00)
+
+module.exports = function (config) {
+  config.set({
+
+    // base path that will be used to resolve all patterns (eg. files, exclude)
+    basePath: '',
+
+    // frameworks to use
+    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
+    frameworks: ['mocha', 'browserify'],
+
+    // list of files / patterns to load in the browser
+    files: [
+      'test/*.js'
+    ],
+
+    // list of files / patterns to exclude
+    exclude: [
+    ],
+
+    // preprocess matching files before serving them to the browser
+    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
+    preprocessors: {
+      'test/*.js': ['browserify']
+    },
+    browserify: {
+      debug: true,
+      transform: []
+    },
+
+    // test results reporter to use
+    // possible values: 'dots', 'progress'
+    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
+    reporters: ['progress'],
+
+    // web server port
+    port: 9876,
+
+    // enable / disable colors in the output (reporters and logs)
+    colors: true,
+
+    // level of logging
+    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
+    logLevel: config.LOG_INFO,
+
+    // enable / disable watching file and executing tests whenever any file changes
+    autoWatch: true,
+
+    // start these browsers
+    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
+    browsers: ['ChromeHeadless'],
+
+    // Continuous Integration mode
+    // if true, Karma captures browsers, runs the tests and exits
+    singleRun: true,
+
+    // Concurrency level
+    // how many browser should be started simultaneous
+    concurrency: Infinity
+  })
+}
diff --git a/mqtt-backend/node_modules/number-allocator/lib/number-allocator.js b/mqtt-backend/node_modules/number-allocator/lib/number-allocator.js
new file mode 100644
index 0000000..40ddbfb
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/lib/number-allocator.js
@@ -0,0 +1,249 @@
+// Copyright Takatoshi Kondo 2021
+//
+// Distributed under the MIT License
+
+'use strict'
+
+const SortedSet = require('js-sdsl').OrderedSet
+const debugTrace = require('debug')('number-allocator:trace')
+const debugError = require('debug')('number-allocator:error')
+/**
+ * Interval constructor
+ * @constructor
+ * @param {Number} low  - The lowest value of the interval
+ * @param {Number} high - The highest value of the interval
+ */
+function Interval (low, high) {
+  this.low = low
+  this.high = high
+}
+
+Interval.prototype.equals = function (other) {
+  return this.low === other.low && this.high === other.high
+}
+
+Interval.prototype.compare = function (other) {
+  if (this.low < other.low && this.high < other.low) return -1
+  if (other.low < this.low && other.high < this.low) return 1
+  return 0
+}
+
+/**
+ * NumberAllocator constructor.
+ * The all numbers are set to vacant status.
+ * Time Complexity O(1)
+ * @constructor
+ * @param {Number} min  - The maximum number of allocatable. The number must be integer.
+ * @param {Number} maxh - The minimum number of allocatable. The number must be integer.
+ */
+function NumberAllocator (min, max) {
+  if (!(this instanceof NumberAllocator)) {
+    return new NumberAllocator(min, max)
+  }
+
+  this.min = min
+  this.max = max
+
+  this.ss = new SortedSet(
+    [],
+    (lhs, rhs) => {
+      return lhs.compare(rhs)
+    }
+  )
+  debugTrace('Create')
+  this.clear()
+}
+
+/**
+ * Get the first vacant number. The status of the number is not updated.
+ * Time Complexity O(1)
+ * @return {Number} - The first vacant number. If all numbers are occupied, return null.
+ *                    When alloc() is called then the same value will be allocated.
+ */
+NumberAllocator.prototype.firstVacant = function () {
+  if (this.ss.size() === 0) return null
+  return this.ss.front().low
+}
+
+/**
+ * Allocate the first vacant number. The number become occupied status.
+ * Time Complexity O(1)
+ * @return {Number} - The first vacant number. If all numbers are occupied, return null.
+ */
+NumberAllocator.prototype.alloc = function () {
+  if (this.ss.size() === 0) {
+    debugTrace('alloc():empty')
+    return null
+  }
+  const it = this.ss.begin()
+  const low = it.pointer.low
+  const high = it.pointer.high
+  const num = low
+  if (num + 1 <= high) {
+    // x|----|
+    this.ss.updateKeyByIterator(it, new Interval(low + 1, high))
+  } else {
+    this.ss.eraseElementByPos(0)
+  }
+  debugTrace('alloc():' + num)
+  return num
+}
+
+/**
+ * Use the number. The number become occupied status.
+ * If the number has already been occupied, then return false.
+ * Time Complexity O(logN) : N is the number of intervals (not numbers)
+ * @param {Number} num - The number to request use.
+ * @return {Boolean} - If `num` was not occupied, then return true, otherwise return false.
+ */
+NumberAllocator.prototype.use = function (num) {
+  const key = new Interval(num, num)
+  const it = this.ss.lowerBound(key)
+  if (!it.equals(this.ss.end())) {
+    const low = it.pointer.low
+    const high = it.pointer.high
+    if (it.pointer.equals(key)) {
+      // |x|
+      this.ss.eraseElementByIterator(it)
+      debugTrace('use():' + num)
+      return true
+    }
+
+    // x |-----|
+    if (low > num) return false
+
+    // |x----|
+    if (low === num) {
+      // x|----|
+      this.ss.updateKeyByIterator(it, new Interval(low + 1, high))
+      debugTrace('use():' + num)
+      return true
+    }
+
+    // |----x|
+    if (high === num) {
+      // |----|x
+      this.ss.updateKeyByIterator(it, new Interval(low, high - 1))
+      debugTrace('use():' + num)
+      return true
+    }
+
+    // |--x--|
+    // x|--|
+    this.ss.updateKeyByIterator(it, new Interval(num + 1, high))
+    // |--|x|--|
+    this.ss.insert(new Interval(low, num - 1))
+    debugTrace('use():' + num)
+    return true
+  }
+
+  debugTrace('use():failed')
+  return false
+}
+
+/**
+ * Deallocate the number. The number become vacant status.
+ * Time Complexity O(logN) : N is the number of intervals (not numbers)
+ * @param {Number} num - The number to deallocate. The number must be occupied status.
+ *                       In other words, the number must be allocated by alloc() or occupied be use().
+ */
+NumberAllocator.prototype.free = function (num) {
+  if (num < this.min || num > this.max) {
+    debugError('free():' + num + ' is out of range')
+    return
+  }
+  const key = new Interval(num, num)
+  const it = this.ss.upperBound(key)
+  if (it.equals(this.ss.end())) {
+    // ....v
+    if (it.equals(this.ss.begin())) {
+      // Insert new interval
+      this.ss.insert(key)
+      return
+    }
+    it.pre()
+    const low = it.pointer.high
+    const high = it.pointer.high
+    if (high + 1 === num) {
+      // Concat to left
+      this.ss.updateKeyByIterator(it, new Interval(low, num))
+    } else {
+      // Insert new interval
+      this.ss.insert(key)
+    }
+  } else {
+    if (it.equals(this.ss.begin())) {
+      // v....
+      if (num + 1 === it.pointer.low) {
+        // Concat to right
+        const high = it.pointer.high
+        this.ss.updateKeyByIterator(it, new Interval(num, high))
+      } else {
+        // Insert new interval
+        this.ss.insert(key)
+      }
+    } else {
+      // ..v..
+      const rLow = it.pointer.low
+      const rHigh = it.pointer.high
+      it.pre()
+      const lLow = it.pointer.low
+      const lHigh = it.pointer.high
+      if (lHigh + 1 === num) {
+        if (num + 1 === rLow) {
+          // Concat to left and right
+          this.ss.eraseElementByIterator(it)
+          this.ss.updateKeyByIterator(it, new Interval(lLow, rHigh))
+        } else {
+          // Concat to left
+          this.ss.updateKeyByIterator(it, new Interval(lLow, num))
+        }
+      } else {
+        if (num + 1 === rLow) {
+          // Concat to right
+          this.ss.eraseElementByIterator(it.next())
+          this.ss.insert(new Interval(num, rHigh))
+        } else {
+          // Insert new interval
+          this.ss.insert(key)
+        }
+      }
+    }
+  }
+  debugTrace('free():' + num)
+}
+
+/**
+ * Clear all occupied numbers.
+ * The all numbers are set to vacant status.
+ * Time Complexity O(1)
+ */
+NumberAllocator.prototype.clear = function () {
+  debugTrace('clear()')
+  this.ss.clear()
+  this.ss.insert(new Interval(this.min, this.max))
+}
+
+/**
+ * Get the number of intervals. Interval is internal structure of this library.
+ * This function is for debugging.
+ * Time Complexity O(1)
+ * @return {Number} - The number of intervals.
+ */
+NumberAllocator.prototype.intervalCount = function () {
+  return this.ss.size()
+}
+
+/**
+ * Dump the internal structor of the library.
+ * This function is for debugging.
+ * Time Complexity O(N) : N is the number of intervals (not numbers)
+ */
+NumberAllocator.prototype.dump = function () {
+  console.log('length:' + this.ss.size())
+  for (const element of this.ss) {
+    console.log(element)
+  }
+}
+
+module.exports = NumberAllocator
diff --git a/mqtt-backend/node_modules/number-allocator/package.json b/mqtt-backend/node_modules/number-allocator/package.json
new file mode 100644
index 0000000..04940d6
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/package.json
@@ -0,0 +1,69 @@
+{
+  "name": "number-allocator",
+  "version": "1.0.14",
+  "description": "A library for the unique number allocator",
+  "main": "index.js",
+  "types": "types/index.d.ts",
+  "directories": {
+    "lib": "lib",
+    "test": "test"
+  },
+  "scripts": {
+    "test": "node_modules/.bin/nyc --reporter=lcov --reporter=text ./node_modules/mocha/bin/_mocha",
+    "pretest": "standard ./*.js ./lib/**/*.js ./test/*.js | snazzy",
+    "codecov": "codecov",
+    "browser-build": "rimraf dist/ && mkdirp dist/ && browserify index.js --standalone number-allocator > dist/number-allocator.js && uglifyjs dist/number-allocator.js --compress --mangle --output dist/number-allocator.min.js",
+    "typescript-compile-test": "tsc -p test/typescript/tsconfig.json",
+    "typescript-compile-execute": "node test/typescript/*.js",
+    "typescript-test": "npm run typescript-compile-test && npm run typescript-compile-execute",
+    "test-web": "karma start",
+    "generate-docs": "node_modules/.bin/jsdoc -d docs lib"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/redboltz/number-allocator.git"
+  },
+  "author": "Takatoshi Kondo",
+  "license": "MIT",
+  "keywords": [
+    "unique",
+    "number",
+    "id",
+    "value",
+    "allocator"
+  ],
+  "bugs": {
+    "url": "https://github.com/redboltz/number-allocator/issues"
+  },
+  "homepage": "https://github.com/redboltz/number-allocator#readme",
+  "dependencies": {
+    "debug": "^4.3.1",
+    "js-sdsl": "4.3.0"
+  },
+  "devDependencies": {
+    "airtap": "^4.0.1",
+    "browserify": "^17.0.0",
+    "chai": "^4.2.0",
+    "codecov": "^3.8.1",
+    "eslint": "^7.18.0",
+    "eslint-config-standard": "16.0.2",
+    "jsdoc": "^3.6.6",
+    "karma": "^6.0.3",
+    "karma-browserify": "^8.0.0",
+    "karma-chrome-launcher": "^3.1.0",
+    "karma-mocha": "^2.0.1",
+    "mocha": "^10.2.0",
+    "nyc": "^15.1.0",
+    "snazzy": "^9.0.0",
+    "standard": "^16.0.3",
+    "tslint": "^5.11.0",
+    "tslint-config-standard": "^9.0.0",
+    "typescript": "^4.1.3",
+    "uglify-es": "^3.3.9"
+  },
+  "standard": {
+    "env": [
+      "mocha"
+    ]
+  }
+}
diff --git a/mqtt-backend/node_modules/number-allocator/test/test.js b/mqtt-backend/node_modules/number-allocator/test/test.js
new file mode 100644
index 0000000..2f9b246
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/test/test.js
@@ -0,0 +1,337 @@
+// Copyright Takatoshi Kondo 2021
+//
+// Distributed under the MIT License
+
+'use strict'
+
+const NumberAllocator = require('..').NumberAllocator
+const assert = require('chai').assert
+
+describe('number-allocator', function () {
+  it('should create without number', function (done) {
+    const a = NumberAllocator(0, 0)
+    assert.equal(a.intervalCount(), 1)
+    done()
+  })
+  it('should work with one number', function (done) {
+    const a = new NumberAllocator(0, 0)
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.firstVacant(), 0)
+
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.intervalCount(), 0)
+
+    assert.equal(a.alloc(), null)
+    assert.equal(a.firstVacant(), null)
+
+    a.free(0)
+
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.intervalCount(), 0)
+
+    assert.equal(a.alloc(), null)
+
+    assert.equal(a.use(0), false)
+    assert.equal(a.use(1), false)
+    assert.equal(a.use(-1), false)
+    a.free(0)
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.use(0), true)
+    assert.equal(a.intervalCount(), 0)
+    assert.equal(a.use(1), false)
+
+    assert.equal(a.alloc(), null)
+
+    a.free(0)
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.intervalCount(), 0)
+
+    done()
+  })
+  it('should work with one number (offset)', function (done) {
+    const a = new NumberAllocator(5, 5)
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.firstVacant(), 5)
+
+    assert.equal(a.alloc(), 5)
+    assert.equal(a.intervalCount(), 0)
+
+    assert.equal(a.alloc(), null)
+    assert.equal(a.firstVacant(), null)
+
+    a.free(5)
+
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.alloc(), 5)
+    assert.equal(a.intervalCount(), 0)
+
+    assert.equal(a.alloc(), null)
+
+    assert.equal(a.use(5), false)
+    assert.equal(a.use(1), false)
+    a.free(5)
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.use(5), true)
+    assert.equal(a.intervalCount(), 0)
+    assert.equal(a.use(1), false)
+
+    assert.equal(a.alloc(), null)
+
+    a.free(5)
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.alloc(), 5)
+    assert.equal(a.intervalCount(), 0)
+
+    done()
+  })
+  it('should alloc/free work well on interval', function (done) {
+    const a = new NumberAllocator(0, 4)
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.alloc(), 1)
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.alloc(), 2)
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.alloc(), 3)
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.alloc(), 4)
+    assert.equal(a.intervalCount(), 0)
+
+    assert.equal(a.alloc(), null)
+
+    a.free(2)
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.alloc(), 2)
+    assert.equal(a.intervalCount(), 0)
+
+    done()
+  })
+  it('should use/free work well on interval', function (done) {
+    const a = new NumberAllocator(0, 4)
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.use(0), true)
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.use(4), true)
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.use(2), true)
+    assert.equal(a.intervalCount(), 2)
+    assert.equal(a.use(1), true)
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.use(3), true)
+    assert.equal(a.intervalCount(), 0)
+    assert.equal(a.use(0), false)
+    assert.equal(a.use(1), false)
+    assert.equal(a.use(2), false)
+    assert.equal(a.use(3), false)
+    assert.equal(a.use(4), false)
+    a.free(2)
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.use(2), true)
+    assert.equal(a.intervalCount(), 0)
+    done()
+  })
+  it('should clear work well and interval be updated well', function (done) {
+    const a = new NumberAllocator(0, 4)
+
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.use(1), true)
+
+    assert.equal(a.alloc(), 2)
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.use(3), true)
+
+    assert.equal(a.alloc(), 4)
+    assert.equal(a.intervalCount(), 0)
+
+    a.clear()
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.use(1), true)
+
+    assert.equal(a.alloc(), 2)
+    assert.equal(a.intervalCount(), 1)
+
+    assert.equal(a.use(3), true)
+
+    assert.equal(a.alloc(), 4)
+    assert.equal(a.intervalCount(), 0)
+
+    done()
+  })
+  it('should interval be concatinated well', function (done) {
+    const prepare = function () {
+      const a = new NumberAllocator(0, 4)
+      assert.equal(a.use(0), true)
+      assert.equal(a.use(1), true)
+      assert.equal(a.use(2), true)
+      assert.equal(a.use(3), true)
+      assert.equal(a.use(4), true)
+      return a
+    }
+
+    let a = prepare()
+    a.free(0)
+    assert.equal(a.intervalCount(), 1)
+    a.free(4)
+    assert.equal(a.intervalCount(), 2)
+    a.free(2)
+    assert.equal(a.intervalCount(), 3)
+    a.free(1)
+    assert.equal(a.intervalCount(), 2)
+    // concat left and right
+    a.free(3)
+    assert.equal(a.intervalCount(), 1)
+
+    a = prepare()
+    a.free(3)
+    assert.equal(a.intervalCount(), 1)
+    // ....v
+    // end concat right
+    a.free(4)
+    assert.equal(a.intervalCount(), 1)
+
+    a = prepare()
+    a.free(1)
+    assert.equal(a.intervalCount(), 1)
+    // begin concat left
+    a.free(0)
+    assert.equal(a.intervalCount(), 1)
+
+    a = prepare()
+    a.free(2)
+    assert.equal(a.intervalCount(), 1)
+    // begin no concat
+    a.free(0)
+    assert.equal(a.intervalCount(), 2)
+
+    a = prepare()
+    a.free(1)
+    assert.equal(a.intervalCount(), 1)
+    a.free(4)
+    assert.equal(a.intervalCount(), 2)
+    // concat left
+    a.free(2)
+    assert.equal(a.intervalCount(), 2)
+
+    a = prepare()
+    a.free(4)
+    assert.equal(a.intervalCount(), 1)
+    a.free(1)
+    assert.equal(a.intervalCount(), 2)
+    // concat right
+    a.free(3)
+    assert.equal(a.intervalCount(), 2)
+
+    done()
+  })
+  it('should work well with negative numbers', function (done) {
+    const a = new NumberAllocator(-2, 3)
+    assert.equal(a.intervalCount(), 1)
+    assert.equal(a.use(2), true)
+    assert.equal(a.intervalCount(), 2)
+
+    const value = a.alloc()
+    assert.notEqual(value, null)
+    assert.equal(value, -2)
+    assert.equal(a.intervalCount(), 2)
+
+    assert.equal(a.use(0), true)
+    assert.equal(a.intervalCount(), 3)
+
+    done()
+  })
+  it('should dump', function (done) {
+    const a = new NumberAllocator(0, 4)
+    a.dump()
+    assert.equal(a.use(0), true)
+    a.dump()
+    assert.equal(a.use(1), true)
+    a.dump()
+    assert.equal(a.use(2), true)
+    a.dump()
+    a.free(0)
+    a.dump()
+    a.free(2)
+    a.dump()
+    a.free(1)
+    a.dump()
+    done()
+  })
+  it('should fail use the same number twice in the middle of interval', function (done) {
+    const a = new NumberAllocator(0, 4)
+    assert.equal(a.use(1), true)
+    assert.equal(a.use(1), false)
+    done()
+  })
+  it('should do nothing non allocated free', function (done) {
+    const a = NumberAllocator(0, 1)
+    // if DEBUG="nuber-allocator:error" then output error log
+    a.free(0)
+    a.free(1)
+    a.free(5)
+    done()
+  })
+  it('should concat to right on free', function (done) {
+    const a = NumberAllocator(0, 3)
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.alloc(), 1)
+    a.free(1)
+    assert.equal(a.alloc(), 1)
+    done()
+  })
+  it('should concat to left on free', function (done) {
+    const a = NumberAllocator(0, 3)
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.alloc(), 1)
+    assert.equal(a.alloc(), 2)
+    a.free(0)
+    a.free(1)
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.alloc(), 1)
+    done()
+  })
+  it('should concat to left and right on free', function (done) {
+    const a = NumberAllocator(0, 3)
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.alloc(), 1)
+    assert.equal(a.alloc(), 2)
+    a.free(0)
+    a.free(2)
+    a.free(1)
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.alloc(), 1)
+    assert.equal(a.alloc(), 2)
+    done()
+  })
+  it('should insert new interval on free', function (done) {
+    const a = NumberAllocator(0, 4)
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.alloc(), 1)
+    assert.equal(a.alloc(), 2)
+    assert.equal(a.alloc(), 3)
+    assert.equal(a.alloc(), 4)
+    a.free(0)
+    a.free(4)
+    a.free(2)
+    assert.equal(a.alloc(), 0)
+    assert.equal(a.alloc(), 2)
+    assert.equal(a.alloc(), 4)
+    done()
+  })
+})
diff --git a/mqtt-backend/node_modules/number-allocator/test/typescript/test.ts b/mqtt-backend/node_modules/number-allocator/test/typescript/test.ts
new file mode 100644
index 0000000..fa8fafe
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/test/typescript/test.ts
@@ -0,0 +1,24 @@
+import { NumberAllocator } from '../..'
+
+const a: NumberAllocator = new NumberAllocator(1, 5)
+
+const num1: Number | null = a.firstVacant()
+console.log(num1)
+
+const num2: Number | null = a.alloc()
+console.log(num2)
+
+const ret: Boolean = a.use(3)
+console.log(ret)
+
+a.free(2)
+
+const ic1: Number = a.intervalCount()
+console.log(ic1)
+
+a.dump()
+
+a.clear()
+
+const ic2: Number = a.intervalCount()
+console.log(ic2)
diff --git a/mqtt-backend/node_modules/number-allocator/test/typescript/tsconfig.json b/mqtt-backend/node_modules/number-allocator/test/typescript/tsconfig.json
new file mode 100644
index 0000000..0b8d393
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/test/typescript/tsconfig.json
@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "module": "commonjs",
+    "target": "es5",
+    "moduleResolution": "node",
+    "noEmitOnError": true,
+    "noImplicitAny": true,
+    "alwaysStrict": true,
+    "strictNullChecks": true,
+    "noImplicitReturns": true,
+    "noImplicitThis": true,
+    "sourceMap": true
+  }
+}
diff --git a/mqtt-backend/node_modules/number-allocator/types/index.d.ts b/mqtt-backend/node_modules/number-allocator/types/index.d.ts
new file mode 100644
index 0000000..54501a5
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/types/index.d.ts
@@ -0,0 +1 @@
+export { NumberAllocator } from './lib/number-allocator'
diff --git a/mqtt-backend/node_modules/number-allocator/types/lib/number-allocator.d.ts b/mqtt-backend/node_modules/number-allocator/types/lib/number-allocator.d.ts
new file mode 100644
index 0000000..9d056c0
--- /dev/null
+++ b/mqtt-backend/node_modules/number-allocator/types/lib/number-allocator.d.ts
@@ -0,0 +1,65 @@
+export declare class NumberAllocator {
+  /**
+   * NumberAllocator constructor.
+   * The all numbers are set to vacant status.
+   * Time Complexity O(1)
+   * @constructor
+   * @param {number} min  - The maximum number of allocatable. The number must be integer.
+   * @param {number} maxh - The minimum number of allocatable. The number must be integer.
+   */
+  constructor (min: number, max: number)
+
+  /**
+   * Get the first vacant number. The status of the number is not updated.
+   * Time Complexity O(1)
+   * @return {number} - The first vacant number. If all numbers are occupied, return null.
+   *                    When alloc() is called then the same value will be allocated.
+   */
+  public firstVacant (): number | null
+
+  /**
+   * Allocate the first vacant number. The number become occupied status.
+   * Time Complexity O(1)
+   * @return {number} - The first vacant number. If all numbers are occupied, return null.
+   */
+  public alloc (): number | null
+
+  /**
+   * Use the number. The number become occupied status.
+   * If the number has already been occupied, then return false.
+   * Time Complexity O(logN) : N is the number of intervals (not numbers)
+   * @param {number} num - The number to request use.
+   * @return {Boolean} - If `num` was not occupied, then return true, otherwise return false.
+   */
+  public use (num: number): Boolean
+
+  /**
+   * Deallocate the number. The number become vacant status.
+   * Time Complexity O(logN) : N is the number of intervals (not numbers)
+   * @param {number} num - The number to deallocate. The number must be occupied status.
+   *                       In other words, the number must be allocated by alloc() or occupied be use().
+   */
+  public free (num: number): void
+
+  /**
+   * Clear all occupied numbers.
+   * The all numbers are set to vacant status.
+   * Time Complexity O(1)
+   */
+  public clear (): void
+
+  /**
+   * Get the number of intervals. Interval is internal structure of this library.
+   * This function is for debugging.
+   * Time Complexity O(1)
+   * @return {number} - The number of intervals.
+   */
+  public intervalCount (): number
+
+  /**
+   * Dump the internal structor of the library.
+   * This function is for debugging.
+   * Time Complexity O(N) : N is the number of intervals (not numbers)
+   */
+  dump (): void
+}
diff --git a/mqtt-backend/node_modules/once/LICENSE b/mqtt-backend/node_modules/once/LICENSE
new file mode 100644
index 0000000..19129e3
--- /dev/null
+++ b/mqtt-backend/node_modules/once/LICENSE
@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/mqtt-backend/node_modules/once/README.md b/mqtt-backend/node_modules/once/README.md
new file mode 100644
index 0000000..1f1ffca
--- /dev/null
+++ b/mqtt-backend/node_modules/once/README.md
@@ -0,0 +1,79 @@
+# once
+
+Only call a function once.
+
+## usage
+
+```javascript
+var once = require('once')
+
+function load (file, cb) {
+  cb = once(cb)
+  loader.load('file')
+  loader.once('load', cb)
+  loader.once('error', cb)
+}
+```
+
+Or add to the Function.prototype in a responsible way:
+
+```javascript
+// only has to be done once
+require('once').proto()
+
+function load (file, cb) {
+  cb = cb.once()
+  loader.load('file')
+  loader.once('load', cb)
+  loader.once('error', cb)
+}
+```
+
+Ironically, the prototype feature makes this module twice as
+complicated as necessary.
+
+To check whether you function has been called, use `fn.called`. Once the
+function is called for the first time the return value of the original
+function is saved in `fn.value` and subsequent calls will continue to
+return this value.
+
+```javascript
+var once = require('once')
+
+function load (cb) {
+  cb = once(cb)
+  var stream = createStream()
+  stream.once('data', cb)
+  stream.once('end', function () {
+    if (!cb.called) cb(new Error('not found'))
+  })
+}
+```
+
+## `once.strict(func)`
+
+Throw an error if the function is called twice.
+
+Some functions are expected to be called only once. Using `once` for them would
+potentially hide logical errors.
+
+In the example below, the `greet` function has to call the callback only once:
+
+```javascript
+function greet (name, cb) {
+  // return is missing from the if statement
+  // when no name is passed, the callback is called twice
+  if (!name) cb('Hello anonymous')
+  cb('Hello ' + name)
+}
+
+function log (msg) {
+  console.log(msg)
+}
+
+// this will print 'Hello anonymous' but the logical error will be missed
+greet(null, once(msg))
+
+// once.strict will print 'Hello anonymous' and throw an error when the callback will be called the second time
+greet(null, once.strict(msg))
+```
diff --git a/mqtt-backend/node_modules/once/once.js b/mqtt-backend/node_modules/once/once.js
new file mode 100644
index 0000000..2354067
--- /dev/null
+++ b/mqtt-backend/node_modules/once/once.js
@@ -0,0 +1,42 @@
+var wrappy = require('wrappy')
+module.exports = wrappy(once)
+module.exports.strict = wrappy(onceStrict)
+
+once.proto = once(function () {
+  Object.defineProperty(Function.prototype, 'once', {
+    value: function () {
+      return once(this)
+    },
+    configurable: true
+  })
+
+  Object.defineProperty(Function.prototype, 'onceStrict', {
+    value: function () {
+      return onceStrict(this)
+    },
+    configurable: true
+  })
+})
+
+function once (fn) {
+  var f = function () {
+    if (f.called) return f.value
+    f.called = true
+    return f.value = fn.apply(this, arguments)
+  }
+  f.called = false
+  return f
+}
+
+function onceStrict (fn) {
+  var f = function () {
+    if (f.called)
+      throw new Error(f.onceError)
+    f.called = true
+    return f.value = fn.apply(this, arguments)
+  }
+  var name = fn.name || 'Function wrapped with `once`'
+  f.onceError = name + " shouldn't be called more than once"
+  f.called = false
+  return f
+}
diff --git a/mqtt-backend/node_modules/once/package.json b/mqtt-backend/node_modules/once/package.json
new file mode 100644
index 0000000..16815b2
--- /dev/null
+++ b/mqtt-backend/node_modules/once/package.json
@@ -0,0 +1,33 @@
+{
+  "name": "once",
+  "version": "1.4.0",
+  "description": "Run a function exactly one time",
+  "main": "once.js",
+  "directories": {
+    "test": "test"
+  },
+  "dependencies": {
+    "wrappy": "1"
+  },
+  "devDependencies": {
+    "tap": "^7.0.1"
+  },
+  "scripts": {
+    "test": "tap test/*.js"
+  },
+  "files": [
+    "once.js"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/once"
+  },
+  "keywords": [
+    "once",
+    "function",
+    "one",
+    "single"
+  ],
+  "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me/)",
+  "license": "ISC"
+}
diff --git a/mqtt-backend/node_modules/process-nextick-args/index.js b/mqtt-backend/node_modules/process-nextick-args/index.js
new file mode 100644
index 0000000..3eecf11
--- /dev/null
+++ b/mqtt-backend/node_modules/process-nextick-args/index.js
@@ -0,0 +1,45 @@
+'use strict';
+
+if (typeof process === 'undefined' ||
+    !process.version ||
+    process.version.indexOf('v0.') === 0 ||
+    process.version.indexOf('v1.') === 0 && process.version.indexOf('v1.8.') !== 0) {
+  module.exports = { nextTick: nextTick };
+} else {
+  module.exports = process
+}
+
+function nextTick(fn, arg1, arg2, arg3) {
+  if (typeof fn !== 'function') {
+    throw new TypeError('"callback" argument must be a function');
+  }
+  var len = arguments.length;
+  var args, i;
+  switch (len) {
+  case 0:
+  case 1:
+    return process.nextTick(fn);
+  case 2:
+    return process.nextTick(function afterTickOne() {
+      fn.call(null, arg1);
+    });
+  case 3:
+    return process.nextTick(function afterTickTwo() {
+      fn.call(null, arg1, arg2);
+    });
+  case 4:
+    return process.nextTick(function afterTickThree() {
+      fn.call(null, arg1, arg2, arg3);
+    });
+  default:
+    args = new Array(len - 1);
+    i = 0;
+    while (i < args.length) {
+      args[i++] = arguments[i];
+    }
+    return process.nextTick(function afterTick() {
+      fn.apply(null, args);
+    });
+  }
+}
+
diff --git a/mqtt-backend/node_modules/process-nextick-args/license.md b/mqtt-backend/node_modules/process-nextick-args/license.md
new file mode 100644
index 0000000..c67e353
--- /dev/null
+++ b/mqtt-backend/node_modules/process-nextick-args/license.md
@@ -0,0 +1,19 @@
+# Copyright (c) 2015 Calvin Metcalf
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+**THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.**
diff --git a/mqtt-backend/node_modules/process-nextick-args/package.json b/mqtt-backend/node_modules/process-nextick-args/package.json
new file mode 100644
index 0000000..6070b72
--- /dev/null
+++ b/mqtt-backend/node_modules/process-nextick-args/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "process-nextick-args",
+  "version": "2.0.1",
+  "description": "process.nextTick but always with args",
+  "main": "index.js",
+  "files": [
+    "index.js"
+  ],
+  "scripts": {
+    "test": "node test.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/calvinmetcalf/process-nextick-args.git"
+  },
+  "author": "",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/calvinmetcalf/process-nextick-args/issues"
+  },
+  "homepage": "https://github.com/calvinmetcalf/process-nextick-args",
+  "devDependencies": {
+    "tap": "~0.2.6"
+  }
+}
diff --git a/mqtt-backend/node_modules/process-nextick-args/readme.md b/mqtt-backend/node_modules/process-nextick-args/readme.md
new file mode 100644
index 0000000..ecb432c
--- /dev/null
+++ b/mqtt-backend/node_modules/process-nextick-args/readme.md
@@ -0,0 +1,18 @@
+process-nextick-args
+=====
+
+[![Build Status](https://travis-ci.org/calvinmetcalf/process-nextick-args.svg?branch=master)](https://travis-ci.org/calvinmetcalf/process-nextick-args)
+
+```bash
+npm install --save process-nextick-args
+```
+
+Always be able to pass arguments to process.nextTick, no matter the platform
+
+```js
+var pna = require('process-nextick-args');
+
+pna.nextTick(function (a, b, c) {
+  console.log(a, b, c);
+}, 'step', 3,  'profit');
+```
diff --git a/mqtt-backend/node_modules/process/.eslintrc b/mqtt-backend/node_modules/process/.eslintrc
new file mode 100644
index 0000000..1e7aab7
--- /dev/null
+++ b/mqtt-backend/node_modules/process/.eslintrc
@@ -0,0 +1,21 @@
+{
+extends: "eslint:recommended",
+  "env": {
+    "node": true,
+    "browser": true,
+    "es6" : true,
+    "mocha": true
+  },
+  "rules": {
+    "indent": [2, 4],
+    "brace-style": [2, "1tbs"],
+    "quotes": [2, "single"],
+    "no-console": 0,
+    "no-shadow": 0,
+    "no-use-before-define": [2, "nofunc"],
+    "no-underscore-dangle": 0,
+    "no-constant-condition": 0,
+    "space-after-function-name": 0,
+   "consistent-return": 0
+  }
+}
diff --git a/mqtt-backend/node_modules/process/LICENSE b/mqtt-backend/node_modules/process/LICENSE
new file mode 100644
index 0000000..b8c1246
--- /dev/null
+++ b/mqtt-backend/node_modules/process/LICENSE
@@ -0,0 +1,22 @@
+(The MIT License)
+
+Copyright (c) 2013 Roman Shtylman <shtylman@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/process/README.md b/mqtt-backend/node_modules/process/README.md
new file mode 100644
index 0000000..6570729
--- /dev/null
+++ b/mqtt-backend/node_modules/process/README.md
@@ -0,0 +1,26 @@
+# process
+
+```require('process');``` just like any other module.
+
+Works in node.js and browsers via the browser.js shim provided with the module.
+
+## browser implementation
+
+The goal of this module is not to be a full-fledged alternative to the builtin process module. This module mostly exists to provide the nextTick functionality and little more. We keep this module lean because it will often be included by default by tools like browserify when it detects a module has used the `process` global.
+
+It also exposes a "browser" member (i.e. `process.browser`) which is `true` in this implementation but `undefined` in node. This can be used in isomorphic code that adjusts it's behavior depending on which environment it's running in. 
+
+If you are looking to provide other process methods, I suggest you monkey patch them onto the process global in your app. A list of user created patches is below.
+
+* [hrtime](https://github.com/kumavis/browser-process-hrtime)
+* [stdout](https://github.com/kumavis/browser-stdout)
+
+## package manager notes
+
+If you are writing a bundler to package modules for client side use, make sure you use the ```browser``` field hint in package.json.
+
+See https://gist.github.com/4339901 for details.
+
+The [browserify](https://github.com/substack/node-browserify) module will properly handle this field when bundling your files.
+
+
diff --git a/mqtt-backend/node_modules/process/browser.js b/mqtt-backend/node_modules/process/browser.js
new file mode 100644
index 0000000..d059362
--- /dev/null
+++ b/mqtt-backend/node_modules/process/browser.js
@@ -0,0 +1,184 @@
+// shim for using process in browser
+var process = module.exports = {};
+
+// cached from whatever global is present so that test runners that stub it
+// don't break things.  But we need to wrap it in a try catch in case it is
+// wrapped in strict mode code which doesn't define any globals.  It's inside a
+// function because try/catches deoptimize in certain engines.
+
+var cachedSetTimeout;
+var cachedClearTimeout;
+
+function defaultSetTimout() {
+    throw new Error('setTimeout has not been defined');
+}
+function defaultClearTimeout () {
+    throw new Error('clearTimeout has not been defined');
+}
+(function () {
+    try {
+        if (typeof setTimeout === 'function') {
+            cachedSetTimeout = setTimeout;
+        } else {
+            cachedSetTimeout = defaultSetTimout;
+        }
+    } catch (e) {
+        cachedSetTimeout = defaultSetTimout;
+    }
+    try {
+        if (typeof clearTimeout === 'function') {
+            cachedClearTimeout = clearTimeout;
+        } else {
+            cachedClearTimeout = defaultClearTimeout;
+        }
+    } catch (e) {
+        cachedClearTimeout = defaultClearTimeout;
+    }
+} ())
+function runTimeout(fun) {
+    if (cachedSetTimeout === setTimeout) {
+        //normal enviroments in sane situations
+        return setTimeout(fun, 0);
+    }
+    // if setTimeout wasn't available but was latter defined
+    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
+        cachedSetTimeout = setTimeout;
+        return setTimeout(fun, 0);
+    }
+    try {
+        // when when somebody has screwed with setTimeout but no I.E. maddness
+        return cachedSetTimeout(fun, 0);
+    } catch(e){
+        try {
+            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
+            return cachedSetTimeout.call(null, fun, 0);
+        } catch(e){
+            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
+            return cachedSetTimeout.call(this, fun, 0);
+        }
+    }
+
+
+}
+function runClearTimeout(marker) {
+    if (cachedClearTimeout === clearTimeout) {
+        //normal enviroments in sane situations
+        return clearTimeout(marker);
+    }
+    // if clearTimeout wasn't available but was latter defined
+    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
+        cachedClearTimeout = clearTimeout;
+        return clearTimeout(marker);
+    }
+    try {
+        // when when somebody has screwed with setTimeout but no I.E. maddness
+        return cachedClearTimeout(marker);
+    } catch (e){
+        try {
+            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
+            return cachedClearTimeout.call(null, marker);
+        } catch (e){
+            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
+            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
+            return cachedClearTimeout.call(this, marker);
+        }
+    }
+
+
+
+}
+var queue = [];
+var draining = false;
+var currentQueue;
+var queueIndex = -1;
+
+function cleanUpNextTick() {
+    if (!draining || !currentQueue) {
+        return;
+    }
+    draining = false;
+    if (currentQueue.length) {
+        queue = currentQueue.concat(queue);
+    } else {
+        queueIndex = -1;
+    }
+    if (queue.length) {
+        drainQueue();
+    }
+}
+
+function drainQueue() {
+    if (draining) {
+        return;
+    }
+    var timeout = runTimeout(cleanUpNextTick);
+    draining = true;
+
+    var len = queue.length;
+    while(len) {
+        currentQueue = queue;
+        queue = [];
+        while (++queueIndex < len) {
+            if (currentQueue) {
+                currentQueue[queueIndex].run();
+            }
+        }
+        queueIndex = -1;
+        len = queue.length;
+    }
+    currentQueue = null;
+    draining = false;
+    runClearTimeout(timeout);
+}
+
+process.nextTick = function (fun) {
+    var args = new Array(arguments.length - 1);
+    if (arguments.length > 1) {
+        for (var i = 1; i < arguments.length; i++) {
+            args[i - 1] = arguments[i];
+        }
+    }
+    queue.push(new Item(fun, args));
+    if (queue.length === 1 && !draining) {
+        runTimeout(drainQueue);
+    }
+};
+
+// v8 likes predictible objects
+function Item(fun, array) {
+    this.fun = fun;
+    this.array = array;
+}
+Item.prototype.run = function () {
+    this.fun.apply(null, this.array);
+};
+process.title = 'browser';
+process.browser = true;
+process.env = {};
+process.argv = [];
+process.version = ''; // empty string to avoid regexp issues
+process.versions = {};
+
+function noop() {}
+
+process.on = noop;
+process.addListener = noop;
+process.once = noop;
+process.off = noop;
+process.removeListener = noop;
+process.removeAllListeners = noop;
+process.emit = noop;
+process.prependListener = noop;
+process.prependOnceListener = noop;
+
+process.listeners = function (name) { return [] }
+
+process.binding = function (name) {
+    throw new Error('process.binding is not supported');
+};
+
+process.cwd = function () { return '/' };
+process.chdir = function (dir) {
+    throw new Error('process.chdir is not supported');
+};
+process.umask = function() { return 0; };
diff --git a/mqtt-backend/node_modules/process/index.js b/mqtt-backend/node_modules/process/index.js
new file mode 100644
index 0000000..8d8ed7d
--- /dev/null
+++ b/mqtt-backend/node_modules/process/index.js
@@ -0,0 +1,2 @@
+// for now just expose the builtin process global from node.js
+module.exports = global.process;
diff --git a/mqtt-backend/node_modules/process/package.json b/mqtt-backend/node_modules/process/package.json
new file mode 100644
index 0000000..d2cfaad
--- /dev/null
+++ b/mqtt-backend/node_modules/process/package.json
@@ -0,0 +1,27 @@
+{
+  "author": "Roman Shtylman <shtylman@gmail.com>",
+  "name": "process",
+  "description": "process information for node.js and browsers",
+  "keywords": [
+    "process"
+  ],
+  "scripts": {
+    "test": "mocha test.js",
+    "browser": "zuul --no-coverage --ui mocha-bdd --local 8080 -- test.js"
+  },
+  "version": "0.11.10",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/shtylman/node-process.git"
+  },
+  "license": "MIT",
+  "browser": "./browser.js",
+  "main": "./index.js",
+  "engines": {
+    "node": ">= 0.6.0"
+  },
+  "devDependencies": {
+    "mocha": "2.2.1",
+    "zuul": "^3.10.3"
+  }
+}
diff --git a/mqtt-backend/node_modules/process/test.js b/mqtt-backend/node_modules/process/test.js
new file mode 100644
index 0000000..8ba579c
--- /dev/null
+++ b/mqtt-backend/node_modules/process/test.js
@@ -0,0 +1,199 @@
+var assert = require('assert');
+var ourProcess = require('./browser');
+describe('test against our process', function () {
+    test(ourProcess);
+});
+if (!process.browser) {
+  describe('test against node', function () {
+    test(process);
+  });
+  vmtest();
+}
+function test (ourProcess) {
+    describe('test arguments', function () {
+        it ('works', function (done) {
+          var order = 0;
+
+
+          ourProcess.nextTick(function (num) {
+              assert.equal(num, order++, 'first one works');
+              ourProcess.nextTick(function (num) {
+                assert.equal(num, order++, 'recursive one is 4th');
+              }, 3);
+          }, 0);
+          ourProcess.nextTick(function (num) {
+              assert.equal(num, order++, 'second one starts');
+              ourProcess.nextTick(function (num) {
+                assert.equal(num, order++, 'this is third');
+                ourProcess.nextTick(function (num) {
+                    assert.equal(num, order++, 'this is last');
+                    done();
+                }, 5);
+            }, 4);
+          }, 1);
+          ourProcess.nextTick(function (num) {
+
+              assert.equal(num, order++, '3rd schedualed happens after the error');
+          }, 2);
+        });
+    });
+if (!process.browser) {
+    describe('test errors', function (t) {
+        it ('works', function (done) {
+        var order = 0;
+        process.removeAllListeners('uncaughtException');
+        process.once('uncaughtException', function(err) {
+            assert.equal(2, order++, 'error is third');
+            ourProcess.nextTick(function () {
+                assert.equal(5, order++, 'schedualed in error is last');
+                done();
+            });
+        });
+        ourProcess.nextTick(function () {
+            assert.equal(0, order++, 'first one works');
+            ourProcess.nextTick(function () {
+            assert.equal(4, order++, 'recursive one is 4th');
+            });
+        });
+        ourProcess.nextTick(function () {
+            assert.equal(1, order++, 'second one starts');
+            throw(new Error('an error is thrown'));
+        });
+        ourProcess.nextTick(function () {
+            assert.equal(3, order++, '3rd schedualed happens after the error');
+        });
+        });
+    });
+}
+    describe('rename globals', function (t) {
+      var oldTimeout = setTimeout;
+      var oldClear = clearTimeout;
+
+      it('clearTimeout', function (done){
+
+        var ok = true;
+        clearTimeout = function () {
+          ok = false;
+        }
+        var ran = false;
+        function cleanup() {
+          clearTimeout = oldClear;
+          var err;
+          try {
+            assert.ok(ok, 'fake clearTimeout ran');
+            assert.ok(ran, 'should have run');
+          } catch (e) {
+            err = e;
+          }
+          done(err);
+        }
+        setTimeout(cleanup, 1000);
+        ourProcess.nextTick(function () {
+          ran = true;
+        });
+      });
+      it('just setTimeout', function (done){
+
+
+        setTimeout = function () {
+          setTimeout = oldTimeout;
+          try {
+            assert.ok(false, 'fake setTimeout called')
+          } catch (e) {
+            done(e);
+          }
+
+        }
+
+        ourProcess.nextTick(function () {
+          setTimeout = oldTimeout;
+          done();
+        });
+      });
+    });
+}
+function vmtest() {
+  var vm = require('vm');
+  var fs = require('fs');
+  var process =  fs.readFileSync('./browser.js', {encoding: 'utf8'});
+
+
+  describe('should work in vm in strict mode with no globals', function () {
+    it('should parse', function (done) {
+      var str = '"use strict";var module = {exports:{}};';
+      str += process;
+      str += 'this.works = process.browser;';
+      var script = new vm.Script(str);
+      var context = {
+        works: false
+      };
+      script.runInNewContext(context);
+      assert.ok(context.works);
+      done();
+    });
+    it('setTimeout throws error', function (done) {
+      var str = '"use strict";var module = {exports:{}};';
+      str += process;
+      str += 'try {process.nextTick(function () {})} catch (e){this.works = e;}';
+      var script = new vm.Script(str);
+      var context = {
+        works: false
+      };
+      script.runInNewContext(context);
+      assert.ok(context.works);
+      done();
+    });
+    it('should generally work', function (done) {
+      var str = '"use strict";var module = {exports:{}};';
+      str += process;
+      str += 'process.nextTick(function () {assert.ok(true);done();})';
+      var script = new vm.Script(str);
+      var context = {
+        clearTimeout: clearTimeout,
+        setTimeout: setTimeout,
+        done: done,
+        assert: assert
+      };
+      script.runInNewContext(context);
+    });
+    it('late defs setTimeout', function (done) {
+      var str = '"use strict";var module = {exports:{}};';
+      str += process;
+      str += 'var setTimeout = hiddenSetTimeout;process.nextTick(function () {assert.ok(true);done();})';
+      var script = new vm.Script(str);
+      var context = {
+        clearTimeout: clearTimeout,
+        hiddenSetTimeout: setTimeout,
+        done: done,
+        assert: assert
+      };
+      script.runInNewContext(context);
+    });
+    it('late defs clearTimeout', function (done) {
+      var str = '"use strict";var module = {exports:{}};';
+      str += process;
+      str += 'var clearTimeout = hiddenClearTimeout;process.nextTick(function () {assert.ok(true);done();})';
+      var script = new vm.Script(str);
+      var context = {
+        hiddenClearTimeout: clearTimeout,
+        setTimeout: setTimeout,
+        done: done,
+        assert: assert
+      };
+      script.runInNewContext(context);
+    });
+    it('late defs setTimeout and then redefine', function (done) {
+      var str = '"use strict";var module = {exports:{}};';
+      str += process;
+      str += 'var setTimeout = hiddenSetTimeout;process.nextTick(function () {setTimeout = function (){throw new Error("foo")};hiddenSetTimeout(function(){process.nextTick(function (){assert.ok(true);done();});});});';
+      var script = new vm.Script(str);
+      var context = {
+        clearTimeout: clearTimeout,
+        hiddenSetTimeout: setTimeout,
+        done: done,
+        assert: assert
+      };
+      script.runInNewContext(context);
+    });
+  });
+}
diff --git a/mqtt-backend/node_modules/qlobber/.github/workflows/ci.yml b/mqtt-backend/node_modules/qlobber/.github/workflows/ci.yml
new file mode 100644
index 0000000..82e5605
--- /dev/null
+++ b/mqtt-backend/node_modules/qlobber/.github/workflows/ci.yml
@@ -0,0 +1,46 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [14, 16, 18]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Update APT
+        run: sudo apt update
+
+      - name: Install OS dependencies
+        run: sudo apt install libboost-dev libboost-context-dev
+
+      - name: Use Node ${{ matrix.node-version }}
+        uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install packages
+        run: npm install
+
+      - name: Lint
+        run: npx grunt lint
+
+      - name: Test
+        if: matrix.node-version != '18'
+        run: npm test
+
+      - name: Coverage
+        if: matrix.node-version == '18'
+        run: npm run coverage
+
+      - name: Coveralls
+        if: matrix.node-version == '18'
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/mqtt-backend/node_modules/qlobber/Gruntfile.js b/mqtt-backend/node_modules/qlobber/Gruntfile.js
new file mode 100644
index 0000000..5579bc1
--- /dev/null
+++ b/mqtt-backend/node_modules/qlobber/Gruntfile.js
@@ -0,0 +1,70 @@
+/*jslint node: true */
+"use strict";
+
+const c8 = "npx c8 -x Gruntfile.js -x 'test/**'";
+
+module.exports = function (grunt)
+{
+    grunt.initConfig(
+    {
+        jshint: {
+            all: [ 'Gruntfile.js', 'index.js', 'lib/*.js', 'aedes/**/*.js', 'test/*.js', 'bench/**/*.js' ],
+            options: {
+                esversion: 9,
+                node: true
+            }
+        },
+
+        apidox: {
+            input: 'lib/qlobber.js',
+            output: 'README.md',
+            fullSourceDescription: true,
+            extraHeadingLevels: 1
+        },
+
+        exec: Object.fromEntries(Object.entries({
+            test: {
+                cmd: 'node --expose-gc ./node_modules/.bin/mocha test/*.js'
+            },
+
+            cover: {
+                cmd: `${c8} npx grunt test`
+            },
+
+            cover_report: {
+                cmd: `${c8} report -r lcov`
+            },
+
+            cover_check: {
+                cmd: `${c8} check-coverage --statements 100 --branches 100 --functions 100 --lines 100`
+            },
+
+            bench: {
+                cmd: 'npx bench -c 20000 -i bench/options/default.js,bench/options/dedup.js,bench/options/mapval.js,bench/options/default-native.js,bench/options/dedup-native.js,bench/options/default-cache-splits.js -k options bench/add bench/add_match_remove bench/match bench/match_search bench/test'
+            },
+
+            'bench-check': {
+                cmd: 'npx bench -c 20000 -i bench/options/check-default.js,bench/options/check-dedup.js,bench/options/check-mapval.js,bench/options/check-default-native.js,bench/options/check-dedup-native.js -k options bench/add bench/add_match_remove bench/match bench/match_search bench/test'
+            },
+
+            'bench-many': {
+                cmd: 'npx bench -c 1 -i bench/options/default.js,bench/options/dedup.js,bench/options/mapval.js,bench/options/default-native.js,bench/options/dedup-native.js,bench/options/default-cache-splits.js -k options bench/add_many bench/add_shortcut_many bench/match_many bench/match_search_many bench/test_many'
+            }
+        }).map(([k, v]) => [k, { stdio: 'inherit', ...v }]))
+    });
+    
+    grunt.loadNpmTasks('grunt-contrib-jshint');
+    grunt.loadNpmTasks('grunt-apidox');
+    grunt.loadNpmTasks('grunt-exec');
+
+    grunt.registerTask('lint', 'jshint');
+    grunt.registerTask('test', 'exec:test');
+    grunt.registerTask('docs', 'apidox');
+    grunt.registerTask('coverage', ['exec:cover',
+                                    'exec:cover_report',
+                                    'exec:cover_check']);
+    grunt.registerTask('bench', ['exec:bench',
+                                 'exec:bench-many']);
+    grunt.registerTask('bench-check', 'exec:bench-check');
+    grunt.registerTask('default', ['lint', 'test']);
+};
diff --git a/mqtt-backend/node_modules/qlobber/LICENCE b/mqtt-backend/node_modules/qlobber/LICENCE
new file mode 100644
index 0000000..bfd8a74
--- /dev/null
+++ b/mqtt-backend/node_modules/qlobber/LICENCE
@@ -0,0 +1,19 @@
+Copyright (c) 2016 David Halls <https://github.com/davedoesdev/>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is furnished
+to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/qlobber/README.md b/mqtt-backend/node_modules/qlobber/README.md
new file mode 100644
index 0000000..447da40
--- /dev/null
+++ b/mqtt-backend/node_modules/qlobber/README.md
@@ -0,0 +1,517 @@
+# qlobber&nbsp;&nbsp;&nbsp;[![ci](https://github.com/davedoesdev/qlobber/actions/workflows/ci.yml/badge.svg)](https://github.com/davedoesdev/qlobber/actions/workflows/ci.yml) [![Coverage Status](https://coveralls.io/repos/davedoesdev/qlobber/badge.png?branch=master)](https://coveralls.io/r/davedoesdev/qlobber?branch=master) [![NPM version](https://badge.fury.io/js/qlobber.png)](http://badge.fury.io/js/qlobber)
+
+Node.js globbing for amqp-like topics.
+
+__Note:__ Version 5.0.0 adds async and worker thread support when used on Node 12+.
+
+Example:
+
+```javascript
+var assert = require('assert');
+var Qlobber = require('qlobber').Qlobber;
+var matcher = new Qlobber();
+matcher.add('foo.*', 'it matched!');
+assert.deepEqual(matcher.match('foo.bar'), ['it matched!']);
+assert(matcher.test('foo.bar', 'it matched!'));
+```
+
+The API is described [here](#tableofcontents).
+
+qlobber is implemented using a trie, as described in the RabbitMQ blog posts [here](http://www.rabbitmq.com/blog/2010/09/14/very-fast-and-scalable-topic-routing-part-1/) and [here](http://www.rabbitmq.com/blog/2011/03/28/very-fast-and-scalable-topic-routing-part-2/).
+
+## Installation
+
+```shell
+npm install qlobber
+```
+
+## Another Example
+
+A more advanced example using topics from the [RabbitMQ topic tutorial](http://www.rabbitmq.com/tutorials/tutorial-five-python.html):
+
+```javascript
+var assert = require('assert');
+var Qlobber = require('qlobber').Qlobber;
+var matcher = new Qlobber();
+matcher.add('*.orange.*', 'Q1');
+matcher.add('*.*.rabbit', 'Q2');
+matcher.add('lazy.#', 'Q2');
+assert.deepEqual(['quick.orange.rabbit',
+                  'lazy.orange.elephant',
+                  'quick.orange.fox',
+                  'lazy.brown.fox',
+                  'lazy.pink.rabbit',
+                  'quick.brown.fox',
+                  'orange',
+                  'quick.orange.male.rabbit',
+                  'lazy.orange.male.rabbit'].map(function (topic)
+                  {
+                      return matcher.match(topic).sort();
+                  }),
+                 [['Q1', 'Q2'],
+                  ['Q1', 'Q2'],
+                  ['Q1'],
+                  ['Q2'],
+                  ['Q2', 'Q2'],
+                  [],
+                  [],
+                  [],
+                  ['Q2']]);
+```
+
+## Async Example
+
+Same as the first example but using `await`:
+
+```javascript
+const assert = require('assert');
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+const matcher = new Qlobber.nativeString();
+
+(async () => {
+    await matcher.addP('foo.*', 'it matched!');
+    assert.deepEqual(await matcher.matchP('foo.bar'), ['it matched!']);
+    assert(await matcher.testP('foo.bar', 'it matched!'));
+})();
+```
+
+## Worker Thread Example
+
+Same again but the matching is done on a separate thread:
+
+```
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+const {
+    Worker, isMainThread, parentPort, workerData
+} = require('worker_threads');
+
+if (isMainThread) {
+    const matcher = new Qlobber.nativeString();
+    matcher.add('foo.*', 'it matched!');
+    const worker = new Worker(__filename, {
+        workerData: matcher.state_address
+    });
+    worker.on('message', msg => {
+        const assert = require('assert');
+        assert.deepEqual(msg, [['it matched!'], true]);
+    });
+} else {
+    const matcher = new Qlobber.nativeString(workerData);
+    parentPort.postMessage([
+        matcher.match('foo.bar'),
+        matcher.test('foo.bar', 'it matched!')
+    ]);
+}
+```
+
+## Licence
+
+[MIT](LICENCE)
+
+## Tests
+
+qlobber passes the [RabbitMQ topic tests](https://github.com/rabbitmq/rabbitmq-server/blob/master/src/rabbit_tests.erl) (I converted them from Erlang to Javascript).
+
+To run the tests:
+
+```shell
+npm test
+```
+
+## Lint
+
+```shell
+grunt lint
+```
+
+## Code Coverage
+
+```shell
+npm run coverage
+```
+
+[c8](https://github.com/bcoe/c8) results are available [here](http://rawgit.davedoesdev.com/davedoesdev/qlobber/master/coverage/lcov-report/index.html).
+
+Coveralls page is [here](https://coveralls.io/r/davedoesdev/qlobber).
+
+## Benchmarks
+
+```shell
+grunt bench
+```
+
+qlobber is also benchmarked in [ascoltatori](https://github.com/mcollina/ascoltatori).
+
+## Native Qlobbers
+
+The Javascript Qlobbers don't support asynchronous calls and worker threads
+because Javascript values can't be shared between threads.
+
+In order to support asynchronous calls and worker threads, a native C++
+implementation is available in the
+[qlobber-native](https://www.npmjs.com/package/qlobber-native) module.
+
+Add qlobber-native as a dependency to your project and then add it to qlobber
+like this:
+
+```javascript
+require('qlobber').set_native(require('qlobber-native'));
+```
+
+Note that [`set_native`](#set_nativeqlobber_native) returns qlobber's exports so you can do something like
+this:
+
+```javascript
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+```
+
+Note that qlobber-native requires Gnu C++ version 9+ and Boost 1.70+,
+including the `boost_context` runtime library.
+
+Once's you've added it to qlobber, the following classes will be available
+alongside the Javascript classes:
+
+- `Qlobber.nativeString`
+- `Qlobber.nativeNumber`
+- `QlobberDedup.nativeString`
+- `QlobberDedup.nativeNumber`
+- `QlobberTrue.native`
+
+They can only hold values of a single type (currently strings or numbers).
+
+### Asynchronous calls
+
+The native classes support the same API as the Javascript classes but have the
+following additional methods:
+
+- `addP`
+- `removeP`
+- `matchP`
+- `match_iterP`
+- `testP`
+- `clearP`
+- `visitP`
+- `get_restorerP`
+
+They correspond to their namesakes but return Promises. Note that `match_iterP`
+and `visitP` return async iterators.
+
+# API
+
+_Source: [lib/qlobber.js](lib/qlobber.js)_
+
+<a name="tableofcontents"></a>
+
+- <a name="toc_qlobberoptions"></a>[Qlobber](#qlobberoptions)
+- <a name="toc_qlobberprototypeaddtopic-val"></a><a name="toc_qlobberprototype"></a>[Qlobber.prototype.add](#qlobberprototypeaddtopic-val)
+- <a name="toc_qlobberprototyperemovetopic-val"></a>[Qlobber.prototype.remove](#qlobberprototyperemovetopic-val)
+- <a name="toc_qlobberprototypematchtopic"></a>[Qlobber.prototype.match](#qlobberprototypematchtopic)
+- <a name="toc_qlobberprototypematch_iter"></a>[Qlobber.prototype.match_iter](#qlobberprototypematch_iter)
+- <a name="toc_qlobberprototypetesttopic-val"></a>[Qlobber.prototype.test](#qlobberprototypetesttopic-val)
+- <a name="toc_qlobberprototypetest_valuesvals-val"></a>[Qlobber.prototype.test_values](#qlobberprototypetest_valuesvals-val)
+- <a name="toc_qlobberprototypeclear"></a>[Qlobber.prototype.clear](#qlobberprototypeclear)
+- <a name="toc_qlobberprototypevisit"></a>[Qlobber.prototype.visit](#qlobberprototypevisit)
+- <a name="toc_qlobberprototypeget_restoreroptions"></a>[Qlobber.prototype.get_restorer](#qlobberprototypeget_restoreroptions)
+- <a name="toc_qlobberdedupoptions"></a>[QlobberDedup](#qlobberdedupoptions)
+- <a name="toc_qlobberdedupprototypetest_valuesvals-val"></a><a name="toc_qlobberdedupprototype"></a>[QlobberDedup.prototype.test_values](#qlobberdedupprototypetest_valuesvals-val)
+- <a name="toc_qlobberdedupprototypematchtopic"></a>[QlobberDedup.prototype.match](#qlobberdedupprototypematchtopic)
+- <a name="toc_qlobbertrueoptions"></a>[QlobberTrue](#qlobbertrueoptions)
+- <a name="toc_qlobbertrueprototypetest_values"></a><a name="toc_qlobbertrueprototype"></a>[QlobberTrue.prototype.test_values](#qlobbertrueprototypetest_values)
+- <a name="toc_qlobbertrueprototypematchtopic"></a>[QlobberTrue.prototype.match](#qlobbertrueprototypematchtopic)
+- <a name="toc_visitorstreamqlobber"></a>[VisitorStream](#visitorstreamqlobber)
+- <a name="toc_restorerstreamqlobber"></a>[RestorerStream](#restorerstreamqlobber)
+- <a name="toc_set_nativeqlobber_native"></a>[set_native](#set_nativeqlobber_native)
+
+## Qlobber([options])
+
+> Creates a new qlobber.
+
+**Parameters:**
+
+- `{Object} [options]` Configures the qlobber. Use the following properties:
+  - `{String} separator` The character to use for separating words in topics. Defaults to '.'. MQTT uses '/' as the separator, for example.
+
+  - `{String} wildcard_one` The character to use for matching exactly one _non-empty_ word in a topic. Defaults to '*'. MQTT uses '+', for example.
+
+  - `{String} wildcard_some` The character to use for matching zero or more words in a topic. Defaults to '#'. MQTT uses '#' too.
+
+  - `{Boolean} match_empty_levels` If `true` then `wilcard_one` also matches an empty word in a topic. Defaults to `false`.
+
+  - `{Boolean|Map} cache_adds` Whether to cache topics when adding topic matchers. This will make adding multiple matchers for the same topic faster at the cost of extra memory usage. Defaults to `false`. If you supply a `Map` then it will be used to cache the topics (use this to enumerate all the topics in the qlobber).
+
+  - `{Integer} cache_splits` How many `topic.split` results to cache. When you pass in a topic, it has to be split on the `separator`. Caching the results will make using the same topics multiple times faster at the cost of extra memory usage. Defaults to `0` (no caching). The number of split results cached is limited by the value you pass here.
+
+  - `{Integer} max_words` Maximum number of words to allow in a topic. Defaults to 100.
+
+  - `{Integer} max_wildcard_somes` Maximum number of `wildcard_some` words in a topic. Defaults to 3.
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+<a name="qlobberprototype"></a>
+
+## Qlobber.prototype.add(topic, val)
+
+> Add a topic matcher to the qlobber.
+
+Note you can match more than one value against a topic by calling `add` multiple times with the same topic and different values.
+
+**Parameters:**
+
+- `{String} topic` The topic to match against.
+- `{Any} val` The value to return if the topic is matched.
+
+**Return:**
+
+`{Qlobber}` The qlobber (for chaining).
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.remove(topic, [val])
+
+> Remove a topic matcher from the qlobber.
+
+**Parameters:**
+
+- `{String} topic` The topic that's being matched against.
+- `{Any} [val]` The value that's being matched. If you don't specify `val` then all matchers for `topic` are removed.
+
+**Return:**
+
+`{Qlobber}` The qlobber (for chaining).
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.match(topic)
+
+> Match a topic.
+
+**Parameters:**
+
+- `{String} topic` The topic to match against.
+
+**Return:**
+
+`{Array}` List of values that matched the topic. This may contain duplicates. Use a [`QlobberDedup`](#qlobberdedupoptions) if you don't want duplicates.
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.match_iter()
+
+> Match a topic, returning the matches one at a time.
+
+**Return:**
+
+`{Iterator}` An iterator on the values that match the topic. There may be duplicate values, even if you use a [`QlobberDedup`](#qlobberdedupoptions).
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.test(topic, val)
+
+> Test whether a topic match contains a value. Faster than calling [`match`](#qlobberprototypematchtopic) and searching the result for the value. Values are tested using [`test_values`](#qlobberprototypetest_valuesvals-val).
+
+**Parameters:**
+
+- `{String} topic` The topic to match against.
+- `{Any} val` The value being tested for.
+
+**Return:**
+
+`{Boolean}` Whether matching against `topic` contains `val`.
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.test_values(vals, val)
+
+> Test whether values found in a match contain a value passed to [`test`](#qlobberprototypetesttopic-val). You can override this to provide a custom implementation. Defaults to using `indexOf`.
+
+**Parameters:**
+
+- `{Array} vals` The values found while matching.
+- `{Any} val` The value being tested for.
+
+**Return:**
+
+`{Boolean}` Whether `vals` contains `val`.
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.clear()
+
+> Reset the qlobber.
+
+Removes all topic matchers from the qlobber.
+
+**Return:**
+
+`{Qlobber}` The qlobber (for chaining).
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.visit()
+
+> Visit each node in the qlobber's trie in turn.
+
+**Return:**
+
+`{Iterator}` An iterator on the trie. The iterator returns objects which, if fed (in the same order) to the function returned by [`get_restorer`](#qlobberprototypeget_restoreroptions) on a different qlobber, will build that qlobber's trie to the same state. The objects can be serialized using `JSON.stringify`, _if_ the values you store in the qlobber are also serializable.
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## Qlobber.prototype.get_restorer([options])
+
+> Get a function which can restore the qlobber's trie to a state you retrieved
+by calling [`visit`](#qlobberprototypevisit) on this or another qlobber.
+
+**Parameters:**
+
+- `{Object} [options]` Options for restoring the trie.
+  - `{Boolean} cache_adds` Whether to cache topics when rebuilding the trie. This only applies if you also passed `cache_adds` as true in the [constructor](#qlobberoptions).
+
+**Return:**
+
+`{Function}` Function to call in order to rebuild the qlobber's trie. You should call this repeatedly with the objects you received from a call to [`visit`](#qlobberprototypevisit). If you serialized the objects, remember to deserialize them first (e.g. with `JSON.parse`)!
+
+<sub>Go: [TOC](#tableofcontents) | [Qlobber.prototype](#toc_qlobberprototype)</sub>
+
+## QlobberDedup([options])
+
+> Creates a new de-duplicating qlobber.
+
+Inherits from [`Qlobber`](#qlobberoptions).
+
+**Parameters:**
+
+- `{Object} [options]` Same options as [Qlobber](#qlobberoptions).
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+<a name="qlobberdedupprototype"></a>
+
+## QlobberDedup.prototype.test_values(vals, val)
+
+> Test whether values found in a match contain a value passed to [`test`](#qlobberprototypetesttopic_val). You can override this to provide a custom implementation. Defaults to using `has`.
+
+**Parameters:**
+
+- `{Set} vals` The values found while matching ([ES6 Set](http://www.ecma-international.org/ecma-262/6.0/#sec-set-objects)).
+- `{Any} val` The value being tested for.
+
+**Return:**
+
+`{Boolean}` Whether `vals` contains `val`.
+
+<sub>Go: [TOC](#tableofcontents) | [QlobberDedup.prototype](#toc_qlobberdedupprototype)</sub>
+
+## QlobberDedup.prototype.match(topic)
+
+> Match a topic.
+
+**Parameters:**
+
+- `{String} topic` The topic to match against.
+
+**Return:**
+
+`{Set}` [ES6 Set](http://www.ecma-international.org/ecma-262/6.0/#sec-set-objects) of values that matched the topic.
+
+<sub>Go: [TOC](#tableofcontents) | [QlobberDedup.prototype](#toc_qlobberdedupprototype)</sub>
+
+## QlobberTrue([options])
+
+> Creates a new qlobber which only stores the value `true`.
+
+Whatever value you [`add`](#qlobberprototypeaddtopic-val) to this qlobber
+(even `undefined`), a single, de-duplicated `true` will be stored. Use this
+qlobber if you only need to test whether topics match, not about the values
+they match to.
+
+Inherits from [`Qlobber`](#qlobberoptions).
+
+**Parameters:**
+
+- `{Object} [options]` Same options as [Qlobber](#qlobberoptions).
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+<a name="qlobbertrueprototype"></a>
+
+## QlobberTrue.prototype.test_values()
+
+> This override of [`test_values`](#qlobberprototypetest_valuesvals-val) always
+returns `true`. When you call [`test`](#qlobberprototypetesttopic-val) on a
+`QlobberTrue` instance, the value you pass is ignored since it only cares
+whether a topic is matched.
+
+**Return:**
+
+`{Boolean}` Always `true`.
+
+<sub>Go: [TOC](#tableofcontents) | [QlobberTrue.prototype](#toc_qlobbertrueprototype)</sub>
+
+## QlobberTrue.prototype.match(topic)
+
+> Match a topic.
+
+Since `QlobberTrue` only cares whether a topic is matched and not about values
+it matches to, this override of [`match`](#qlobberprototypematchtopic) just
+calls [`test`](#qlobberprototypetesttopic-val) (with value `undefined`).
+
+**Parameters:**
+
+- `{String} topic` The topic to match against.
+
+**Return:**
+
+`{Boolean}` Whether the `QlobberTrue` instance matches the topic.
+
+<sub>Go: [TOC](#tableofcontents) | [QlobberTrue.prototype](#toc_qlobbertrueprototype)</sub>
+
+## VisitorStream(qlobber)
+
+> Creates a new [`Readable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_readable) stream, in object mode, which calls [`visit`](#qlobberprototypevisit) on a qlobber to generate its data.
+
+You could [`pipe`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_readable_pipe_destination_options) this to a [`JSONStream.stringify`](https://github.com/dominictarr/JSONStream#jsonstreamstringifyopen-sep-close) stream, for instance, to serialize the qlobber to JSON. See [this test](test/json.js#L14) for an example.
+
+Inherits from [`Readable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_readable).
+
+**Parameters:**
+
+- `{Qlobber} qlobber` The qlobber to call [`visit`](#qlobberprototypevisit) on.
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+## RestorerStream(qlobber)
+
+> Creates a new [`Writable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_writable) stream, in object mode, which passes data written to it into the function returned by calling [`get_restorer`](#qlobberprototypeget_restoreroptions) on a qlobber.
+
+You could [`pipe`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_readable_pipe_destination_options) a [`JSONStream.parse`](https://github.com/dominictarr/JSONStream#jsonstreamparsepath) stream to this, for instance, to deserialize the qlobber from JSON. See [this test](test/json.js#L33) for an example.
+
+Inherits from [`Writable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_writable).
+
+**Parameters:**
+
+- `{Qlobber} qlobber` The qlobber to call [`get_restorer`](#qlobberprototypeget_restoreroptions) on.
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+## set_native(qlobber_native)
+
+> Add [qlobber-native](https://www.npmjs.com/package/qlobber-native) to qlobber.
+
+**Parameters:**
+
+- `{Object} qlobber_native` The qlobber-native module, obtained using `require('qlobber-native')`.
+
+**Return:**
+
+`{Object}` The qlobber exports with the following native classes added:
+
+  - `Qlobber.nativeString`
+  - `Qlobber.nativeNumber`
+  - `QlobberDedup.nativeString`
+  - `QlobberDedup.nativeNumber`
+  - `QlobberTrue.native`
+
+<sub>Go: [TOC](#tableofcontents)</sub>
+
+_&mdash;generated by [apidox](https://github.com/codeactual/apidox)&mdash;_
diff --git a/mqtt-backend/node_modules/qlobber/aedes/qlobber-sub.js b/mqtt-backend/node_modules/qlobber/aedes/qlobber-sub.js
new file mode 100644
index 0000000..05e8177
--- /dev/null
+++ b/mqtt-backend/node_modules/qlobber/aedes/qlobber-sub.js
@@ -0,0 +1,122 @@
+/*jslint node: true */
+"use strict";
+
+var util = require('util'),
+    qlobber = require('..'),
+    Qlobber = qlobber.Qlobber;
+
+function QlobberSub (options)
+{
+    Qlobber.call(this, options);
+    this.subscriptionsCount = 0;
+}
+
+util.inherits(QlobberSub, Qlobber);
+
+QlobberSub.prototype._initial_value = function (val)
+{
+    this.subscriptionsCount += 1;
+
+    let r = {
+        topic: val.topic,
+        clientMap: new Map().set(val.clientId, { qos: val.qos, rh: val.rh, rap: val.rap, nl: val.nl }),
+    };
+
+    r[Symbol.iterator] = function* (topic)
+    {
+        if (topic === undefined)
+        {
+            for (let [clientId, sub] of r.clientMap)
+            {
+                yield { topic: r.topic, clientId, ...sub };
+            }
+        }
+        else if (r.topic === topic)
+        {
+            for (let [clientId, sub] of r.clientMap)
+            {
+                yield { clientId, ...sub };
+            }
+        }
+    };
+
+    return r;
+};
+
+QlobberSub.prototype._add_value = function (existing, val)
+{
+    var clientMap = existing.clientMap,
+        size = clientMap.size;
+
+    clientMap.set(val.clientId, { qos: val.qos, rh: val.rh, rap: val.rap, nl: val.nl });
+
+    if (clientMap.size > size)
+    {
+        this.subscriptionsCount += 1;
+    }
+};
+
+QlobberSub.prototype._add_values = function (dest, existing, topic)
+{
+    if (topic === undefined)
+    {
+        for (let [clientId, sub] of existing.clientMap)
+        {
+            dest.push({ clientId, topic: existing.topic, ...sub });
+        }
+    }
+    else if (existing.topic === topic)
+    {
+        for (let [clientId, sub] of existing.clientMap)
+        {
+            dest.push({ clientId,...sub });
+        }
+    }
+};
+
+QlobberSub.prototype._remove_value = function (existing, val)
+{
+    var clientMap = existing.clientMap,
+        size_before = clientMap.size;
+
+    clientMap.delete(val.clientId);
+
+    var size_after = clientMap.size;
+
+    if (size_after < size_before)
+    {
+        this.subscriptionsCount -= 1;
+    }
+
+    return size_after === 0;
+};
+
+// Returns whether client is last subscriber to topic
+QlobberSub.prototype.test_values = function (existing, val)
+{
+    var clientMap = existing.clientMap;
+
+    return (existing.topic === val.topic) &&
+           (clientMap.size === 1) &&
+           clientMap.has(val.clientId);
+};
+
+QlobberSub.prototype.match = function (topic, ctx)
+{
+    return this._match([], 0, topic.split(this._separator), this._trie, ctx);
+};
+
+QlobberSub.prototype.clear = function ()
+{
+    this.subscriptionsCount = 0;
+    return Qlobber.prototype.clear.call(this);
+};
+
+QlobberSub.set_native = function (qlobber_native)
+{
+    const wrap_native = require('../lib/wrap_native.js');
+    QlobberSub.native = wrap_native(qlobber_native.QlobberSub, QlobberSub);
+    return module.exports;
+};
+
+module.exports = QlobberSub;
diff --git a/mqtt-backend/node_modules/qlobber/index.js b/mqtt-backend/node_modules/qlobber/index.js
new file mode 100644
index 0000000..ed5d9db
--- /dev/null
+++ b/mqtt-backend/node_modules/qlobber/index.js
@@ -0,0 +1,3 @@
+/*jslint node: true*/
+"use strict";
+module.exports = require('./lib/qlobber');
diff --git a/mqtt-backend/node_modules/qlobber/lib/qlobber.js b/mqtt-backend/node_modules/qlobber/lib/qlobber.js
new file mode 100644
index 0000000..be150c9
--- /dev/null
+++ b/mqtt-backend/node_modules/qlobber/lib/qlobber.js
@@ -0,0 +1,1126 @@
+/**
+# qlobber&nbsp;&nbsp;&nbsp;[![ci](https://github.com/davedoesdev/qlobber/actions/workflows/ci.yml/badge.svg)](https://github.com/davedoesdev/qlobber/actions/workflows/ci.yml) [![Coverage Status](https://coveralls.io/repos/davedoesdev/qlobber/badge.png?branch=master)](https://coveralls.io/r/davedoesdev/qlobber?branch=master) [![NPM version](https://badge.fury.io/js/qlobber.png)](http://badge.fury.io/js/qlobber)
+
+Node.js globbing for amqp-like topics.
+
+__Note:__ Version 5.0.0 adds async and worker thread support when used on Node 12+.
+
+Example:
+
+```javascript
+var assert = require('assert');
+var Qlobber = require('qlobber').Qlobber;
+var matcher = new Qlobber();
+matcher.add('foo.*', 'it matched!');
+assert.deepEqual(matcher.match('foo.bar'), ['it matched!']);
+assert(matcher.test('foo.bar', 'it matched!'));
+```
+
+The API is described [here](#tableofcontents).
+
+qlobber is implemented using a trie, as described in the RabbitMQ blog posts [here](http://www.rabbitmq.com/blog/2010/09/14/very-fast-and-scalable-topic-routing-part-1/) and [here](http://www.rabbitmq.com/blog/2011/03/28/very-fast-and-scalable-topic-routing-part-2/).
+
+## Installation
+
+```shell
+npm install qlobber
+```
+
+## Another Example
+
+A more advanced example using topics from the [RabbitMQ topic tutorial](http://www.rabbitmq.com/tutorials/tutorial-five-python.html):
+
+```javascript
+var assert = require('assert');
+var Qlobber = require('qlobber').Qlobber;
+var matcher = new Qlobber();
+matcher.add('*.orange.*', 'Q1');
+matcher.add('*.*.rabbit', 'Q2');
+matcher.add('lazy.#', 'Q2');
+assert.deepEqual(['quick.orange.rabbit',
+                  'lazy.orange.elephant',
+                  'quick.orange.fox',
+                  'lazy.brown.fox',
+                  'lazy.pink.rabbit',
+                  'quick.brown.fox',
+                  'orange',
+                  'quick.orange.male.rabbit',
+                  'lazy.orange.male.rabbit'].map(function (topic)
+                  {
+                      return matcher.match(topic).sort();
+                  }),
+                 [['Q1', 'Q2'],
+                  ['Q1', 'Q2'],
+                  ['Q1'],
+                  ['Q2'],
+                  ['Q2', 'Q2'],
+                  [],
+                  [],
+                  [],
+                  ['Q2']]);
+```
+
+## Async Example
+
+Same as the first example but using `await`:
+
+```javascript
+const assert = require('assert');
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+const matcher = new Qlobber.nativeString();
+
+(async () => {
+    await matcher.addP('foo.*', 'it matched!');
+    assert.deepEqual(await matcher.matchP('foo.bar'), ['it matched!']);
+    assert(await matcher.testP('foo.bar', 'it matched!'));
+})();
+```
+
+## Worker Thread Example
+
+Same again but the matching is done on a separate thread:
+
+```
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+const {
+    Worker, isMainThread, parentPort, workerData
+} = require('worker_threads');
+
+if (isMainThread) {
+    const matcher = new Qlobber.nativeString();
+    matcher.add('foo.*', 'it matched!');
+    const worker = new Worker(__filename, {
+        workerData: matcher.state_address
+    });
+    worker.on('message', msg => {
+        const assert = require('assert');
+        assert.deepEqual(msg, [['it matched!'], true]);
+    });
+} else {
+    const matcher = new Qlobber.nativeString(workerData);
+    parentPort.postMessage([
+        matcher.match('foo.bar'),
+        matcher.test('foo.bar', 'it matched!')
+    ]);
+}
+```
+
+## Licence
+
+[MIT](LICENCE)
+
+## Tests
+
+qlobber passes the [RabbitMQ topic tests](https://github.com/rabbitmq/rabbitmq-server/blob/master/src/rabbit_tests.erl) (I converted them from Erlang to Javascript).
+
+To run the tests:
+
+```shell
+npm test
+```
+
+## Lint
+
+```shell
+grunt lint
+```
+
+## Code Coverage
+
+```shell
+npm run coverage
+```
+
+[c8](https://github.com/bcoe/c8) results are available [here](http://rawgit.davedoesdev.com/davedoesdev/qlobber/master/coverage/lcov-report/index.html).
+
+Coveralls page is [here](https://coveralls.io/r/davedoesdev/qlobber).
+
+## Benchmarks
+
+```shell
+grunt bench
+```
+
+qlobber is also benchmarked in [ascoltatori](https://github.com/mcollina/ascoltatori).
+
+## Native Qlobbers
+
+The Javascript Qlobbers don't support asynchronous calls and worker threads
+because Javascript values can't be shared between threads.
+
+In order to support asynchronous calls and worker threads, a native C++
+implementation is available in the
+[qlobber-native](https://www.npmjs.com/package/qlobber-native) module.
+
+Add qlobber-native as a dependency to your project and then add it to qlobber
+like this:
+
+```javascript
+require('qlobber').set_native(require('qlobber-native'));
+```
+
+Note that [`set_native`](#set_nativeqlobber_native) returns qlobber's exports so you can do something like
+this:
+
+```javascript
+const { Qlobber } = require('qlobber').set_native(require('qlobber-native'));
+```
+
+Note that qlobber-native requires Gnu C++ version 9+ and Boost 1.70+,
+including the `boost_context` runtime library.
+
+Once's you've added it to qlobber, the following classes will be available
+alongside the Javascript classes:
+
+- `Qlobber.nativeString`
+- `Qlobber.nativeNumber`
+- `QlobberDedup.nativeString`
+- `QlobberDedup.nativeNumber`
+- `QlobberTrue.native`
+
+They can only hold values of a single type (currently strings or numbers).
+
+### Asynchronous calls
+
+The native classes support the same API as the Javascript classes but have the
+following additional methods:
+
+- `addP`
+- `removeP`
+- `matchP`
+- `match_iterP`
+- `testP`
+- `clearP`
+- `visitP`
+- `get_restorerP`
+
+They correspond to their namesakes but return Promises. Note that `match_iterP`
+and `visitP` return async iterators.
+
+# API
+*/
+
+/*jslint node: true, nomen: true */
+"use strict";
+
+var util = require('util');
+
+/**
+Creates a new qlobber.
+
+@constructor
+@param {Object} [options] Configures the qlobber. Use the following properties:
+- `{String} separator` The character to use for separating words in topics. Defaults to '.'. MQTT uses '/' as the separator, for example.
+
+- `{String} wildcard_one` The character to use for matching exactly one _non-empty_ word in a topic. Defaults to '*'. MQTT uses '+', for example.
+
+- `{String} wildcard_some` The character to use for matching zero or more words in a topic. Defaults to '#'. MQTT uses '#' too.
+
+- `{Boolean} match_empty_levels` If `true` then `wilcard_one` also matches an empty word in a topic. Defaults to `false`.
+
+- `{Boolean|Map} cache_adds` Whether to cache topics when adding topic matchers. This will make adding multiple matchers for the same topic faster at the cost of extra memory usage. Defaults to `false`. If you supply a `Map` then it will be used to cache the topics (use this to enumerate all the topics in the qlobber).
+
+- `{Integer} cache_splits` How many `topic.split` results to cache. When you pass in a topic, it has to be split on the `separator`. Caching the results will make using the same topics multiple times faster at the cost of extra memory usage. Defaults to `0` (no caching). The number of split results cached is limited by the value you pass here.
+
+- `{Integer} max_words` Maximum number of words to allow in a topic. Defaults to 100.
+
+- `{Integer} max_wildcard_somes` Maximum number of `wildcard_some` words in a topic. Defaults to 3.
+*/
+function Qlobber (options)
+{
+    options = options || {};
+
+    this._separator = options.separator || '.';
+    this._wildcard_one = options.wildcard_one || '*';
+    this._wildcard_some = options.wildcard_some || '#';
+    this._max_words = options.max_words || 100;
+    this._max_wildcard_somes = options.max_wildcard_somes || 3;
+    this._match_empty_levels = options.match_empty_levels;
+    this._trie = new Map();
+    if (options.cache_adds instanceof Map)
+    {
+        this._shortcuts = options.cache_adds;
+    }
+    else if (options.cache_adds)
+    {
+        this._shortcuts = new Map();
+    }
+    if (options.cache_splits > 0)
+    {
+        this._cache_splits = options.cache_splits;
+        this._split_cache = new Map();
+    }
+}
+
+Qlobber.prototype._initial_value = function (val)
+{
+    return [val];
+};
+
+Qlobber.prototype._add_value = function (vals, val)
+{
+    vals[vals.length] = val;
+};
+
+Qlobber.prototype._add_values = function (dest, origin)
+{
+    var i, destLength = dest.length, originLength = origin.length;
+
+    for (i = 0; i < originLength; i += 1)
+    {
+        dest[destLength + i] = origin[i];
+    }
+};
+
+Qlobber.prototype._iter_values = function (origin, ctx)
+{
+    return origin[Symbol.iterator](ctx);
+};
+
+Qlobber.prototype._remove_value = function (vals, val)
+{
+    if (val === undefined)
+    {
+        return true;
+    }
+
+    var index = vals.lastIndexOf(val);
+
+    if (index >= 0)
+    {
+        vals.splice(index, 1);
+    }
+
+    return vals.length === 0;
+};
+
+Qlobber.prototype._add = function (val, i, words, sub_trie)
+{
+    var st, word;
+
+    if (i === words.length)
+    {
+        st = sub_trie.get(this._separator);
+        
+        if (st)
+        {
+            this._add_value(st, val);
+        }
+        else
+        {
+            st = this._initial_value(val);
+            sub_trie.set(this._separator, st);
+        }
+        
+        return st;
+    }
+
+    word = words[i];
+    st = sub_trie.get(word);
+    
+    if (!st)
+    {
+        st = new Map();
+        sub_trie.set(word, st);
+    }
+    
+    return this._add(val, i + 1, words, st);
+};
+
+Qlobber.prototype._remove = function (val, i, words, sub_trie)
+{
+    var st, word, r;
+
+    if (i === words.length)
+    {
+        st = sub_trie.get(this._separator);
+
+        if (st && this._remove_value(st, val))
+        {
+            sub_trie.delete(this._separator);
+            return true;
+        }
+
+        return false;
+    }
+    
+    word = words[i];
+    st = sub_trie.get(word);
+
+    if (!st)
+    {
+        return false;
+    }
+
+    r = this._remove(val, i + 1, words, st);
+
+    if (st.size === 0)
+    {
+        sub_trie.delete(word);
+    }
+
+    return r;
+};
+
+Qlobber.prototype._match_some = function (v, i, words, st, ctx)
+{
+    var j, w;
+
+    for (w of st.keys())
+    {
+        if (w !== this._separator)
+        {
+            for (j = i; j < words.length; j += 1)
+            {
+                v = this._match(v, j, words, st, ctx);
+            }
+            break;
+        }
+    }
+
+    return v;
+};
+
+Qlobber.prototype._match = function (v, i, words, sub_trie, ctx)
+{
+    var word, st;
+
+    st = sub_trie.get(this._wildcard_some);
+
+    if (st)
+    {
+        // in the common case there will be no more levels...
+        v = this._match_some(v, i, words, st, ctx);
+        // and we'll end up matching the rest of the words:
+        v = this._match(v, words.length, words, st, ctx);
+    }
+
+    if (i === words.length)
+    {
+        st = sub_trie.get(this._separator);
+
+        if (st)
+        {
+            if (v.dest)
+            {
+                this._add_values(v.dest, v.source, ctx);
+                this._add_values(v.dest, st, ctx);
+                v = v.dest;
+            }
+            else if (v.source)
+            {
+                v.dest = v.source;
+                v.source = st;
+            }
+            else
+            {
+                this._add_values(v, st, ctx);
+            }
+        }
+    }
+    else
+    {
+        word = words[i];
+
+        if ((word !== this._wildcard_one) && (word !== this._wildcard_some))
+        {
+            st = sub_trie.get(word);
+
+            if (st)
+            {
+                v = this._match(v, i + 1, words, st, ctx);
+            }
+        }
+
+        if (word || this._match_empty_levels)
+        {
+            st = sub_trie.get(this._wildcard_one);
+
+            if (st)
+            {
+                v = this._match(v, i + 1, words, st, ctx);
+            }
+        }
+    }
+
+    return v;
+};
+
+Qlobber.prototype._match2 = function (v, topic, ctx)
+{
+    var vals = this._match(
+    {
+        source: v
+    }, 0, this._split(topic, false), this._trie, ctx);
+
+    return vals.source || vals;
+};
+
+Qlobber.prototype._test_some = function (v, i, words, st)
+{
+    var j, w;
+
+    for (w of st.keys())
+    {
+        if (w !== this._separator)
+        {
+            for (j = i; j < words.length; j += 1)
+            {
+                if (this._test(v, j, words, st))
+                {
+                    return true;
+                }
+            }
+            break;
+        }
+    }
+
+    return false;
+};
+
+Qlobber.prototype._test = function (v, i, words, sub_trie)
+{
+    var word, st;
+
+    st = sub_trie.get(this._wildcard_some);
+
+    if (st)
+    {
+            // in the common case there will be no more levels...
+        if (this._test_some(v, i, words, st) ||
+            // and we'll end up matching the rest of the words:
+            this._test(v, words.length, words, st))
+        {
+            return true;
+        }
+    }
+
+    if (i === words.length)
+    {
+        st = sub_trie.get(this._separator);
+
+        if (st && this.test_values(st, v))
+        {
+            return true;
+        }
+    }
+    else
+    {
+        word = words[i];
+
+        if ((word !== this._wildcard_one) && (word !== this._wildcard_some))
+        {
+            st = sub_trie.get(word);
+
+            if (st && this._test(v, i + 1, words, st))
+            {
+                return true;
+            }
+        }
+
+        if (word || this._match_empty_levels)
+        {
+            st = sub_trie.get(this._wildcard_one);
+
+            if (st && this._test(v, i + 1, words, st))
+            {
+                return true;
+            }
+        }
+    }
+
+    return false;
+};
+
+Qlobber.prototype._match_some_iter = function* (i, words, st, ctx)
+{
+    var j, w;
+
+    for (w of st.keys())
+    {
+        if (w !== this._separator)
+        {
+            for (j = i; j < words.length; j += 1)
+            {
+                yield* this._match_iter(j, words, st, ctx);
+            }
+            break;
+        }
+    }
+};
+
+Qlobber.prototype._match_iter = function* (i, words, sub_trie, ctx)
+{
+    var word, st;
+
+    st = sub_trie.get(this._wildcard_some);
+
+    if (st)
+    {
+        // in the common case there will be no more levels...
+        yield* this._match_some_iter(i, words, st, ctx);
+        // and we'll end up matching the rest of the words:
+        yield* this._match_iter(words.length, words, st, ctx);
+    }
+
+    if (i === words.length)
+    {
+        st = sub_trie.get(this._separator);
+
+        if (st)
+        {
+            yield* this._iter_values(st, ctx);
+        }
+    }
+    else
+    {
+        word = words[i];
+
+        if ((word !== this._wildcard_one) && (word !== this._wildcard_some))
+        {
+            st = sub_trie.get(word);
+
+            if (st)
+            {
+                yield* this._match_iter(i + 1, words, st, ctx);
+            }
+        }
+
+        if (word || this._match_empty_levels)
+        {
+            st = sub_trie.get(this._wildcard_one);
+
+            if (st)
+            {
+                yield* this._match_iter(i + 1, words, st, ctx);
+            }
+        }
+    }
+};
+
+Qlobber.prototype._split_words = function (topic) {
+    const r = topic.split(this._separator);
+    if (r.length > this._max_words) {
+        throw new Error('too many words');
+    }
+    return r;
+};
+
+Qlobber.prototype._split = function (topic, adding) {
+    let r;
+    if (this._split_cache) {
+        r = this._split_cache.get(topic);
+        if (r === undefined) {
+            r = this._split_words(topic);
+            this._split_cache.set(topic, r);
+            if (this._split_cache.size > this._cache_splits) {
+                for (let t of this._split_cache.keys()) {
+                    this._split_cache.delete(t);
+                    break;
+                }
+            }
+        }
+    } else {
+        r = this._split_words(topic);
+    }
+    if (adding &&
+        (r.reduce((n, w) => n + (w === this._wildcard_some), 0) > this._max_wildcard_somes)) {
+        throw new Error('too many wildcard somes');
+    }
+    return r;
+};
+
+/**
+Add a topic matcher to the qlobber.
+
+Note you can match more than one value against a topic by calling `add` multiple times with the same topic and different values.
+
+@param {String} topic The topic to match against.
+@param {Any} val The value to return if the topic is matched.
+@return {Qlobber} The qlobber (for chaining).
+*/
+Qlobber.prototype.add = function (topic, val)
+{
+    var shortcut = this._shortcuts && this._shortcuts.get(topic);
+    if (shortcut)
+    {
+        this._add_value(shortcut, val);
+    }
+    else
+    {
+        shortcut = this._add(val, 0, this._split(topic, true), this._trie);
+        if (this._shortcuts)
+        {
+            this._shortcuts.set(topic, shortcut);
+        }
+    }
+    return this;
+};
+
+/**
+Remove a topic matcher from the qlobber.
+
+@param {String} topic The topic that's being matched against.
+@param {Any} [val] The value that's being matched. If you don't specify `val` then all matchers for `topic` are removed.
+@return {Qlobber} The qlobber (for chaining).
+*/
+Qlobber.prototype.remove = function (topic, val)
+{
+    if (this._remove(val, 0, this._split(topic, false), this._trie) && this._shortcuts)
+    {
+        this._shortcuts.delete(topic);
+    }
+    return this;
+};
+
+/**
+Match a topic.
+
+@param {String} topic The topic to match against.
+@return {Array} List of values that matched the topic. This may contain duplicates. Use a [`QlobberDedup`](#qlobberdedupoptions) if you don't want duplicates.
+*/
+Qlobber.prototype.match = function (topic, ctx)
+{
+    return this._match2([], topic, ctx);
+};
+
+/**
+Match a topic, returning the matches one at a time.
+
+@return {Iterator} An iterator on the values that match the topic. There may be duplicate values, even if you use a [`QlobberDedup`](#qlobberdedupoptions).
+*/
+Qlobber.prototype.match_iter = function (topic, ctx)
+{
+    return this._match_iter(0, this._split(topic, false), this._trie, ctx);
+};
+
+/**
+Test whether a topic match contains a value. Faster than calling [`match`](#qlobberprototypematchtopic) and searching the result for the value. Values are tested using [`test_values`](#qlobberprototypetest_valuesvals-val).
+
+@param {String} topic The topic to match against.
+@param {Any} val The value being tested for.
+@return {Boolean} Whether matching against `topic` contains `val`.
+*/
+Qlobber.prototype.test = function (topic, val)
+{
+    return this._test(val, 0, this._split(topic, false), this._trie);
+};
+
+/**
+Test whether values found in a match contain a value passed to [`test`](#qlobberprototypetesttopic-val). You can override this to provide a custom implementation. Defaults to using `indexOf`.
+
+@param {Array} vals The values found while matching.
+@param {Any} val The value being tested for.
+@return {Boolean} Whether `vals` contains `val`.
+*/
+Qlobber.prototype.test_values = function (vals, val)
+{
+    return vals.indexOf(val) >= 0;
+};
+
+/**
+Reset the qlobber.
+
+Removes all topic matchers from the qlobber.
+
+@return {Qlobber} The qlobber (for chaining).
+*/
+Qlobber.prototype.clear = function ()
+{
+    this._trie.clear();
+    if (this._shortcuts)
+    {
+        this._shortcuts.clear();
+    }
+    if (this._split_cache)
+    {
+        this._split_cache.clear();
+    }
+    return this;
+};
+
+// for debugging
+Qlobber.prototype.get_trie = function ()
+{
+    return this._trie;
+};
+
+/**
+Visit each node in the qlobber's trie in turn.
+
+@return {Iterator} An iterator on the trie. The iterator returns objects which, if fed (in the same order) to the function returned by [`get_restorer`](#qlobberprototypeget_restoreroptions) on a different qlobber, will build that qlobber's trie to the same state. The objects can be serialized using `JSON.stringify`, _if_ the values you store in the qlobber are also serializable.
+*/
+Qlobber.prototype.visit = function* ()
+{
+    let iterators = [],
+        iterator = this._trie.entries(),
+        i = 0;
+
+    while (true)
+    {
+        if (i === 0)
+        {
+            yield { type: 'start_entries' };
+        }
+
+        let next = iterator.next();
+
+        if (next.done)
+        {
+            yield { type: 'end_entries' };
+
+            let prev = iterators.pop();
+            if (prev === undefined)
+            {
+                return;
+            }
+
+            [iterator, i] = prev;
+            continue;
+        }
+
+        let [key, value] = next.value;
+        yield { type: 'entry', key: key };
+        ++i;
+
+        if (key === this._separator)
+        {
+            yield { type: 'start_values' };
+
+            if (value[Symbol.iterator])
+            {
+                for (let v of value)
+                {
+                    yield { type: 'value', value: v };
+                }
+            }
+            else
+            {
+                yield { type: 'value', value: value };
+            }
+
+            yield { type: 'end_values' };
+            continue;
+        }
+
+        iterators.push([iterator, i]);
+        iterator = value.entries();
+        i = 0;
+    }
+};
+
+/**
+Get a function which can restore the qlobber's trie to a state you retrieved
+by calling [`visit`](#qlobberprototypevisit) on this or another qlobber.
+
+@param {Object} [options] Options for restoring the trie.
+- `{Boolean} cache_adds` Whether to cache topics when rebuilding the trie. This only applies if you also passed `cache_adds` as true in the [constructor](#qlobberoptions).
+
+@return {Function} Function to call in order to rebuild the qlobber's trie. You should call this repeatedly with the objects you received from a call to [`visit`](#qlobberprototypevisit). If you serialized the objects, remember to deserialize them first (e.g. with `JSON.parse`)!
+*/
+Qlobber.prototype.get_restorer = function (options)
+{
+    options = options || {};
+
+    let sts = [],
+        entry = this._trie,
+        path = '';
+
+    return obj =>
+    {
+        switch (obj.type)
+        {
+            case 'entry':
+                entry = entry || new Map();
+                sts.push([entry, obj.key, path]);
+                entry = entry.get(obj.key);
+                if (options.cache_adds)
+                {
+                    if (path)
+                    {
+                        path += this._separator;
+                    }
+                    path += obj.key;
+                }
+                break;
+
+            case 'value':
+                if (entry)
+                {
+                    this._add_value(entry, obj.value);
+                }
+                else
+                {
+                    entry = this._initial_value(obj.value);
+                }
+                break;
+
+            case 'end_entries':
+                if (entry && (entry.size === 0))
+                {
+                    entry = undefined;
+                }
+                /* falls through */
+
+            case 'end_values':
+                let prev = sts.pop();
+                if (prev === undefined)
+                {
+                    entry = undefined;
+                    path = '';
+                }
+                else
+                {
+                    let [prev_entry, key, prev_path] = prev;
+                    if (entry)
+                    {
+                        if (options.cache_adds &&
+                            this._shortcuts &&
+                            (obj.type === 'end_values'))
+                        {
+                            this._shortcuts.set(prev_path, entry);
+                        }
+                        prev_entry.set(key, entry);
+                    }
+                    entry = prev_entry;
+                    path = prev_path;
+                }
+                break;
+        }
+    };
+};
+
+/**
+Creates a new de-duplicating qlobber.
+
+Inherits from [`Qlobber`](#qlobberoptions).
+
+@constructor
+@param {Object} [options] Same options as Qlobber.
+*/
+function QlobberDedup (options)
+{
+    Qlobber.call(this, options);
+}
+
+util.inherits(QlobberDedup, Qlobber);
+
+QlobberDedup.prototype._initial_value = function (val)
+{
+    return new Set().add(val);
+};
+
+QlobberDedup.prototype._add_value = function (vals, val)
+{
+    vals.add(val);
+};
+
+QlobberDedup.prototype._add_values = function (dest, origin)
+{
+    origin.forEach(function (val)
+    {
+        dest.add(val);
+    });
+};
+
+QlobberDedup.prototype._remove_value = function (vals, val)
+{
+    if (val === undefined)
+    {
+        return true;
+    }
+
+    vals.delete(val);
+    return vals.size === 0;
+};
+
+/**
+Test whether values found in a match contain a value passed to [`test`](#qlobberprototypetesttopic_val). You can override this to provide a custom implementation. Defaults to using `has`.
+
+@param {Set} vals The values found while matching ([ES6 Set](http://www.ecma-international.org/ecma-262/6.0/#sec-set-objects)).
+@param {Any} val The value being tested for.
+@return {Boolean} Whether `vals` contains `val`.
+*/
+QlobberDedup.prototype.test_values = function (vals, val)
+{
+    return vals.has(val);
+};
+
+/**
+Match a topic.
+
+@param {String} topic The topic to match against.
+@return {Set} [ES6 Set](http://www.ecma-international.org/ecma-262/6.0/#sec-set-objects) of values that matched the topic.
+*/
+QlobberDedup.prototype.match = function (topic, ctx)
+{
+    return this._match2(new Set(), topic, ctx);
+};
+
+/**
+Creates a new qlobber which only stores the value `true`.
+
+Whatever value you [`add`](#qlobberprototypeaddtopic-val) to this qlobber
+(even `undefined`), a single, de-duplicated `true` will be stored. Use this
+qlobber if you only need to test whether topics match, not about the values
+they match to.
+
+Inherits from [`Qlobber`](#qlobberoptions).
+
+@constructor
+@param {Object} [options] Same options as Qlobber.
+*/
+function QlobberTrue (options)
+{
+    Qlobber.call(this, options);
+}
+
+util.inherits(QlobberTrue, Qlobber);
+
+QlobberTrue.prototype._initial_value = function ()
+{
+    return true;
+};
+
+QlobberTrue.prototype._add_value = function ()
+{
+};
+
+QlobberTrue.prototype._remove_value = function ()
+{
+    return true;
+};
+
+QlobberTrue.prototype._iter_values = function* ()
+{
+    yield true;
+};
+
+/**
+This override of [`test_values`](#qlobberprototypetest_valuesvals-val) always
+returns `true`. When you call [`test`](#qlobberprototypetesttopic-val) on a
+`QlobberTrue` instance, the value you pass is ignored since it only cares
+whether a topic is matched.
+
+@return {Boolean} Always `true`.
+*/
+QlobberTrue.prototype.test_values = function ()
+{
+    return true;    
+};
+
+/**
+Match a topic.
+
+Since `QlobberTrue` only cares whether a topic is matched and not about values
+it matches to, this override of [`match`](#qlobberprototypematchtopic) just
+calls [`test`](#qlobberprototypetesttopic-val) (with value `undefined`).
+
+@param {String} topic The topic to match against.
+@return {Boolean} Whether the `QlobberTrue` instance matches the topic.
+*/
+QlobberTrue.prototype.match = function (topic, ctx)
+{
+    return this.test(topic, ctx);
+};
+
+let stream = require('stream');
+
+/**
+Creates a new [`Readable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_readable) stream, in object mode, which calls [`visit`](#qlobberprototypevisit) on a qlobber to generate its data.
+
+You could [`pipe`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_readable_pipe_destination_options) this to a [`JSONStream.stringify`](https://github.com/dominictarr/JSONStream#jsonstreamstringifyopen-sep-close) stream, for instance, to serialize the qlobber to JSON. See [this test](test/json.js#L14) for an example.
+
+Inherits from [`Readable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_readable).
+
+@constructor
+
+@param {Qlobber} qlobber The qlobber to call [`visit`](#qlobberprototypevisit) on.
+*/
+function VisitorStream (qlobber)
+{
+    stream.Readable.call(this, { objectMode: true });
+    this._iterator = qlobber.visit();
+}
+
+util.inherits(VisitorStream, stream.Readable);
+
+VisitorStream.prototype._read = function ()
+{
+    while (true)
+    {
+        let { done, value } = this._iterator.next();
+
+        if (done)
+        {
+            this.push(null);
+            break;
+        }
+
+        if (!this.push(value))
+        {
+            break;
+        }
+    }
+};
+
+/**
+Creates a new [`Writable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_writable) stream, in object mode, which passes data written to it into the function returned by calling [`get_restorer`](#qlobberprototypeget_restoreroptions) on a qlobber.
+
+You could [`pipe`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_readable_pipe_destination_options) a [`JSONStream.parse`](https://github.com/dominictarr/JSONStream#jsonstreamparsepath) stream to this, for instance, to deserialize the qlobber from JSON. See [this test](test/json.js#L33) for an example.
+
+Inherits from [`Writable`](https://nodejs.org/dist/latest-v8.x/docs/api/stream.html#stream_class_stream_writable).
+
+@constructor
+
+@param {Qlobber} qlobber The qlobber to call [`get_restorer`](#qlobberprototypeget_restoreroptions) on.
+*/
+function RestorerStream (qlobber)
+{
+    stream.Writable.call(this, { objectMode: true });
+    this._restorer = qlobber.get_restorer();
+}
+
+util.inherits(RestorerStream, stream.Writable);
+
+RestorerStream.prototype._write = function (value, _, cb)
+{
+    this._restorer(value);
+    cb();
+};
+
+let native_module = null;
+
+/**
+Add [qlobber-native](https://www.npmjs.com/package/qlobber-native) to qlobber.
+
+@param {Object} qlobber_native The qlobber-native module, obtained using `require('qlobber-native')`.
+@return {Object} The qlobber exports with the following native classes added:
+- `Qlobber.nativeString`
+- `Qlobber.nativeNumber`
+- `QlobberDedup.nativeString`
+- `QlobberDedup.nativeNumber`
+- `QlobberTrue.native`
+*/
+function set_native(qlobber_native)
+{
+    if (qlobber_native !== native_module)
+    {
+        const wrap_native = require('./wrap_native.js');
+        Qlobber.nativeString = wrap_native(qlobber_native.QlobberString, Qlobber);
+        Qlobber.nativeNumber = wrap_native(qlobber_native.QlobberNumber, Qlobber);
+        QlobberDedup.nativeString = wrap_native(qlobber_native.QlobberDedupString, QlobberDedup);
+        QlobberDedup.nativeNumber = wrap_native(qlobber_native.QlobberDedupNumber, QlobberDedup);
+        QlobberTrue.native = wrap_native(qlobber_native.QlobberTrue, QlobberTrue);
+        native_module = qlobber_native;
+    }
+
+    return exports;
+}
+
+exports.Qlobber = Qlobber;
+exports.QlobberDedup = QlobberDedup;
+exports.QlobberTrue = QlobberTrue;
+exports.VisitorStream = VisitorStream;
+exports.RestorerStream = RestorerStream;
+exports.set_native = set_native;
diff --git a/mqtt-backend/node_modules/qlobber/lib/wrap_native.js b/mqtt-backend/node_modules/qlobber/lib/wrap_native.js
new file mode 100644
index 0000000..37267da
--- /dev/null
+++ b/mqtt-backend/node_modules/qlobber/lib/wrap_native.js
@@ -0,0 +1,116 @@
+"use strict";
+
+const util = require('util');
+
+module.exports = function(QlobberNative, Qlobber)
+{
+    class WrappedQlobberNative extends QlobberNative
+    {
+        constructor(options) {
+            super(options);
+            this.addP = util.promisify(this.add_async);
+            this.removeP = util.promisify(this.remove_async);
+            this.matchP = util.promisify(this.match_async);
+            this.testP = util.promisify(this.test_async);
+            this.clearP = util.promisify(this.clear_async);
+            this._get_visitorP = util.promisify(this.get_visitor_async);
+            this._visit_nextP = util.promisify(this.visit_next_async);
+            this._get_restorerP = util.promisify(this.get_restorer_async);
+            this._restore_nextP = util.promisify(this.restore_next_async);
+            this._match_iterP = util.promisify(this.match_iter_async);
+            this._match_nextP = util.promisify(this.match_next_async);
+        }
+
+        *visit()
+        {
+            const visitor = this.get_visitor();
+
+            while (true)
+            {
+                const v = this.visit_next(visitor);
+                if (v === undefined)
+                {
+                    break;
+                }
+                yield v;
+            }
+        }
+
+        async *visitP()
+        {
+            const visitor = await this._get_visitorP();
+
+            while (true)
+            {
+                const v = await this._visit_nextP(visitor);
+                if (v === undefined)
+                {
+                    break;
+                }
+                yield v;
+            }
+        }
+
+        *match_iter(topic, ctx) {
+            const iterator = super.match_iter(topic, ctx);
+
+            while (true)
+            {
+                const v = this.match_next(iterator);
+                if (v === undefined)
+                {
+                    break;
+                }
+                yield v.value;
+            }
+        }
+
+        async *match_iterP(topic, ctx) {
+            const iterator = await this._match_iterP(topic, ctx);
+
+            while (true)
+            {
+                const v = await this._match_nextP(iterator);
+                if (v === undefined)
+                {
+                    break;
+                }
+                yield v.value;
+            }
+        }
+
+        get_trie()
+        {
+            const qlobber = new Qlobber(this.options);
+            const restorer = qlobber.get_restorer();
+
+            for (let v of this.visit())
+            {
+                restorer(v);
+            }
+
+            return qlobber.get_trie();
+        }
+
+        get_restorer(options)
+        {
+            const restorer = super.get_restorer(options);
+            return obj => {
+                super.restore_next(restorer, obj);
+            };
+        }
+
+        async get_restorerP(options)
+        {
+            const restorer = await this._get_restorerP(options);
+            return async obj => {
+                await this._restore_nextP(restorer, obj);
+            };
+        }
+    }
+
+    WrappedQlobberNative.is_native = true;
+    WrappedQlobberNative.nonNative = Qlobber;
+
+    return WrappedQlobberNative;
+};
diff --git a/mqtt-backend/node_modules/qlobber/package.json b/mqtt-backend/node_modules/qlobber/package.json
new file mode 100644
index 0000000..bf57089
--- /dev/null
+++ b/mqtt-backend/node_modules/qlobber/package.json
@@ -0,0 +1,57 @@
+{
+  "name": "qlobber",
+  "description": "Node.js globbing for amqp-like topics",
+  "version": "7.0.1",
+  "homepage": "https://github.com/davedoesdev/qlobber",
+  "author": {
+    "name": "David Halls",
+    "email": "dave@davedoesdev.com",
+    "url": "http://www.davedoesdev.com"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/davedoesdev/qlobber.git"
+  },
+  "bugs": {
+    "url": "https://github.com/davedoesdev/qlobber/issues"
+  },
+  "license": "MIT",
+  "main": "index.js",
+  "scripts": {
+    "test": "(cd native && npm install && node-gyp rebuild --debug) && grunt test",
+    "coverage": "(cd native && npm install && node-gyp rebuild --debug) && grunt coverage"
+  },
+  "directories": {
+    "test": "test",
+    "lib": "lib"
+  },
+  "keywords": [
+    "amqp",
+    "mqtt",
+    "rabbitmq",
+    "ascoltatore"
+  ],
+  "engines": {
+    "node": ">= 14"
+  },
+  "devDependencies": {
+    "b": "davedoesdev/b",
+    "c8": "^7.11.3",
+    "chai": "^4.3.6",
+    "grunt": "^1.5.3",
+    "grunt-apidox": "^2.0.17",
+    "grunt-contrib-jshint": "^3.2.0",
+    "grunt-exec": "^3.0.0",
+    "JSONStream": "^1.3.5",
+    "mocha": "^10.0.0",
+    "stream-buffers": "^3.0.2"
+  },
+  "overrides": {
+    "jsdoctypeparser": {
+      "lodash": "^4.17.21"
+    },
+    "dox": {
+      "markdown-it": "^12.3.2"
+    }
+  }
+}
diff --git a/mqtt-backend/node_modules/readable-stream/LICENSE b/mqtt-backend/node_modules/readable-stream/LICENSE
new file mode 100644
index 0000000..2873b3b
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/LICENSE
@@ -0,0 +1,47 @@
+Node.js is licensed for use as follows:
+
+"""
+Copyright Node.js contributors. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+"""
+
+This license applies to parts of Node.js originating from the
+https://github.com/joyent/node repository:
+
+"""
+Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+"""
diff --git a/mqtt-backend/node_modules/readable-stream/README.md b/mqtt-backend/node_modules/readable-stream/README.md
new file mode 100644
index 0000000..339af1b
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/README.md
@@ -0,0 +1,116 @@
+# readable-stream
+
+**_Node.js core streams for userland_**
+
+[![npm status](https://img.shields.io/npm/v/readable-stream.svg)](https://npm.im/readable-stream)
+[![node](https://img.shields.io/node/v/readable-stream.svg)](https://www.npmjs.org/package/readable-stream)
+[![Node.js Build](https://github.com/nodejs/readable-stream/workflows/Node.js/badge.svg)](https://github.com/nodejs/readable-stream/actions?query=workflow%3ANode.js)
+[![Browsers Build](https://github.com/nodejs/readable-stream/workflows/Browsers/badge.svg)](https://github.com/nodejs/readable-stream/actions?query=workflow%3ABrowsers)
+
+```bash
+npm install readable-stream
+```
+
+This package is a mirror of the streams implementations in Node.js 18.19.0.
+
+Full documentation may be found on the [Node.js website](https://nodejs.org/dist/v18.19.0/docs/api/stream.html).
+
+If you want to guarantee a stable streams base, regardless of what version of
+Node you, or the users of your libraries are using, use **readable-stream** _only_ and avoid the _"stream"_ module in Node-core, for background see [this blogpost](http://r.va.gg/2014/06/why-i-dont-use-nodes-core-stream-module.html).
+
+As of version 2.0.0 **readable-stream** uses semantic versioning.
+
+## Version 4.x.x
+
+v4.x.x of `readable-stream` is a cut from Node 18. This version supports Node 12, 14, 16 and 18, as well as evergreen browsers.
+The breaking changes introduced by v4 are composed of the combined breaking changes in:
+* [Node v12](https://nodejs.org/en/blog/release/v12.0.0/)
+* [Node v13](https://nodejs.org/en/blog/release/v13.0.0/)
+* [Node v14](https://nodejs.org/en/blog/release/v14.0.0/)
+* [Node v15](https://nodejs.org/en/blog/release/v15.0.0/)
+* [Node v16](https://nodejs.org/en/blog/release/v16.0.0/)
+* [Node v17](https://nodejs.org/en/blog/release/v17.0.0/)
+* [Node v18](https://nodejs.org/en/blog/release/v18.0.0/)
+
+This also includes _many_ new features.
+
+## Version 3.x.x
+
+v3.x.x of `readable-stream` is a cut from Node 10. This version supports Node 6, 8, and 10, as well as evergreen browsers, IE 11 and latest Safari. The breaking changes introduced by v3 are composed by the combined breaking changes in [Node v9](https://nodejs.org/en/blog/release/v9.0.0/) and [Node v10](https://nodejs.org/en/blog/release/v10.0.0/), as follows:
+
+1. Error codes: https://github.com/nodejs/node/pull/13310,
+   https://github.com/nodejs/node/pull/13291,
+   https://github.com/nodejs/node/pull/16589,
+   https://github.com/nodejs/node/pull/15042,
+   https://github.com/nodejs/node/pull/15665,
+   https://github.com/nodejs/readable-stream/pull/344
+2. 'readable' have precedence over flowing
+   https://github.com/nodejs/node/pull/18994
+3. make virtual methods errors consistent
+   https://github.com/nodejs/node/pull/18813
+4. updated streams error handling
+   https://github.com/nodejs/node/pull/18438
+5. writable.end should return this.
+   https://github.com/nodejs/node/pull/18780
+6. readable continues to read when push('')
+   https://github.com/nodejs/node/pull/18211
+7. add custom inspect to BufferList
+   https://github.com/nodejs/node/pull/17907
+8. always defer 'readable' with nextTick
+   https://github.com/nodejs/node/pull/17979
+
+## Version 2.x.x
+
+v2.x.x of `readable-stream` is a cut of the stream module from Node 8 (there have been no semver-major changes from Node 4 to 8). This version supports all Node.js versions from 0.8, as well as evergreen browsers and IE 10 & 11.
+
+# Usage
+
+You can swap your `require('stream')` with `require('readable-stream')`
+without any changes, if you are just using one of the main classes and
+functions.
+
+```js
+const {
+  Readable,
+  Writable,
+  Transform,
+  Duplex,
+  pipeline,
+  finished
+} = require('readable-stream')
+```
+
+Note that `require('stream')` will return `Stream`, while
+`require('readable-stream')` will return `Readable`. We discourage using
+whatever is exported directly, but rather use one of the properties as
+shown in the example above.
+
+## Usage In Browsers
+
+You will need a bundler like [`browserify`](https://github.com/browserify/browserify#readme), [`webpack`](https://webpack.js.org/), [`parcel`](https://github.com/parcel-bundler/parcel#readme) or similar. Polyfills are no longer required since version 4.2.0.
+
+# Streams Working Group
+
+`readable-stream` is maintained by the Streams Working Group, which
+oversees the development and maintenance of the Streams API within
+Node.js. The responsibilities of the Streams Working Group include:
+
+- Addressing stream issues on the Node.js issue tracker.
+- Authoring and editing stream documentation within the Node.js project.
+- Reviewing changes to stream subclasses within the Node.js project.
+- Redirecting changes to streams from the Node.js project to this
+  project.
+- Assisting in the implementation of stream providers within Node.js.
+- Recommending versions of `readable-stream` to be included in Node.js.
+- Messaging about the future of streams to give the community advance
+  notice of changes.
+
+<a name="members"></a>
+
+## Team Members
+
+- **Mathias Buus** ([@mafintosh](https://github.com/mafintosh)) &lt;mathiasbuus@gmail.com&gt;
+- **Matteo Collina** ([@mcollina](https://github.com/mcollina)) &lt;matteo.collina@gmail.com&gt;
+  - Release GPG key: 3ABC01543F22DD2239285CDD818674489FBC127E
+- **Robert Nagy** ([@ronag](https://github.com/ronag)) &lt;ronagy@icloud.com&gt;
+- **Vincent Weevers** ([@vweevers](https://github.com/vweevers)) &lt;mail@vincentweevers.nl&gt;
diff --git a/mqtt-backend/node_modules/readable-stream/lib/_stream_duplex.js b/mqtt-backend/node_modules/readable-stream/lib/_stream_duplex.js
new file mode 100644
index 0000000..e03c6bf
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/_stream_duplex.js
@@ -0,0 +1,4 @@
+'use strict'
+
+// Keep this file as an alias for the full stream module.
+module.exports = require('./stream').Duplex
diff --git a/mqtt-backend/node_modules/readable-stream/lib/_stream_passthrough.js b/mqtt-backend/node_modules/readable-stream/lib/_stream_passthrough.js
new file mode 100644
index 0000000..1206dc4
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/_stream_passthrough.js
@@ -0,0 +1,4 @@
+'use strict'
+
+// Keep this file as an alias for the full stream module.
+module.exports = require('./stream').PassThrough
diff --git a/mqtt-backend/node_modules/readable-stream/lib/_stream_readable.js b/mqtt-backend/node_modules/readable-stream/lib/_stream_readable.js
new file mode 100644
index 0000000..4941658
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/_stream_readable.js
@@ -0,0 +1,4 @@
+'use strict'
+
+// Keep this file as an alias for the full stream module.
+module.exports = require('./stream').Readable
diff --git a/mqtt-backend/node_modules/readable-stream/lib/_stream_transform.js b/mqtt-backend/node_modules/readable-stream/lib/_stream_transform.js
new file mode 100644
index 0000000..ef227b1
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/_stream_transform.js
@@ -0,0 +1,4 @@
+'use strict'
+
+// Keep this file as an alias for the full stream module.
+module.exports = require('./stream').Transform
diff --git a/mqtt-backend/node_modules/readable-stream/lib/_stream_writable.js b/mqtt-backend/node_modules/readable-stream/lib/_stream_writable.js
new file mode 100644
index 0000000..00c7b03
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/_stream_writable.js
@@ -0,0 +1,4 @@
+'use strict'
+
+// Keep this file as an alias for the full stream module.
+module.exports = require('./stream').Writable
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/add-abort-signal.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/add-abort-signal.js
new file mode 100644
index 0000000..3475b6e
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/add-abort-signal.js
@@ -0,0 +1,52 @@
+'use strict'
+
+const { SymbolDispose } = require('../../ours/primordials')
+const { AbortError, codes } = require('../../ours/errors')
+const { isNodeStream, isWebStream, kControllerErrorFunction } = require('./utils')
+const eos = require('./end-of-stream')
+const { ERR_INVALID_ARG_TYPE } = codes
+let addAbortListener
+
+// This method is inlined here for readable-stream
+// It also does not allow for signal to not exist on the stream
+// https://github.com/nodejs/node/pull/36061#discussion_r533718029
+const validateAbortSignal = (signal, name) => {
+  if (typeof signal !== 'object' || !('aborted' in signal)) {
+    throw new ERR_INVALID_ARG_TYPE(name, 'AbortSignal', signal)
+  }
+}
+module.exports.addAbortSignal = function addAbortSignal(signal, stream) {
+  validateAbortSignal(signal, 'signal')
+  if (!isNodeStream(stream) && !isWebStream(stream)) {
+    throw new ERR_INVALID_ARG_TYPE('stream', ['ReadableStream', 'WritableStream', 'Stream'], stream)
+  }
+  return module.exports.addAbortSignalNoValidate(signal, stream)
+}
+module.exports.addAbortSignalNoValidate = function (signal, stream) {
+  if (typeof signal !== 'object' || !('aborted' in signal)) {
+    return stream
+  }
+  const onAbort = isNodeStream(stream)
+    ? () => {
+        stream.destroy(
+          new AbortError(undefined, {
+            cause: signal.reason
+          })
+        )
+      }
+    : () => {
+        stream[kControllerErrorFunction](
+          new AbortError(undefined, {
+            cause: signal.reason
+          })
+        )
+      }
+  if (signal.aborted) {
+    onAbort()
+  } else {
+    addAbortListener = addAbortListener || require('../../ours/util').addAbortListener
+    const disposable = addAbortListener(signal, onAbort)
+    eos(stream, disposable[SymbolDispose])
+  }
+  return stream
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/buffer_list.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/buffer_list.js
new file mode 100644
index 0000000..b55e35c
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/buffer_list.js
@@ -0,0 +1,157 @@
+'use strict'
+
+const { StringPrototypeSlice, SymbolIterator, TypedArrayPrototypeSet, Uint8Array } = require('../../ours/primordials')
+const { Buffer } = require('buffer')
+const { inspect } = require('../../ours/util')
+module.exports = class BufferList {
+  constructor() {
+    this.head = null
+    this.tail = null
+    this.length = 0
+  }
+  push(v) {
+    const entry = {
+      data: v,
+      next: null
+    }
+    if (this.length > 0) this.tail.next = entry
+    else this.head = entry
+    this.tail = entry
+    ++this.length
+  }
+  unshift(v) {
+    const entry = {
+      data: v,
+      next: this.head
+    }
+    if (this.length === 0) this.tail = entry
+    this.head = entry
+    ++this.length
+  }
+  shift() {
+    if (this.length === 0) return
+    const ret = this.head.data
+    if (this.length === 1) this.head = this.tail = null
+    else this.head = this.head.next
+    --this.length
+    return ret
+  }
+  clear() {
+    this.head = this.tail = null
+    this.length = 0
+  }
+  join(s) {
+    if (this.length === 0) return ''
+    let p = this.head
+    let ret = '' + p.data
+    while ((p = p.next) !== null) ret += s + p.data
+    return ret
+  }
+  concat(n) {
+    if (this.length === 0) return Buffer.alloc(0)
+    const ret = Buffer.allocUnsafe(n >>> 0)
+    let p = this.head
+    let i = 0
+    while (p) {
+      TypedArrayPrototypeSet(ret, p.data, i)
+      i += p.data.length
+      p = p.next
+    }
+    return ret
+  }
+
+  // Consumes a specified amount of bytes or characters from the buffered data.
+  consume(n, hasStrings) {
+    const data = this.head.data
+    if (n < data.length) {
+      // `slice` is the same for buffers and strings.
+      const slice = data.slice(0, n)
+      this.head.data = data.slice(n)
+      return slice
+    }
+    if (n === data.length) {
+      // First chunk is a perfect match.
+      return this.shift()
+    }
+    // Result spans more than one buffer.
+    return hasStrings ? this._getString(n) : this._getBuffer(n)
+  }
+  first() {
+    return this.head.data
+  }
+  *[SymbolIterator]() {
+    for (let p = this.head; p; p = p.next) {
+      yield p.data
+    }
+  }
+
+  // Consumes a specified amount of characters from the buffered data.
+  _getString(n) {
+    let ret = ''
+    let p = this.head
+    let c = 0
+    do {
+      const str = p.data
+      if (n > str.length) {
+        ret += str
+        n -= str.length
+      } else {
+        if (n === str.length) {
+          ret += str
+          ++c
+          if (p.next) this.head = p.next
+          else this.head = this.tail = null
+        } else {
+          ret += StringPrototypeSlice(str, 0, n)
+          this.head = p
+          p.data = StringPrototypeSlice(str, n)
+        }
+        break
+      }
+      ++c
+    } while ((p = p.next) !== null)
+    this.length -= c
+    return ret
+  }
+
+  // Consumes a specified amount of bytes from the buffered data.
+  _getBuffer(n) {
+    const ret = Buffer.allocUnsafe(n)
+    const retLen = n
+    let p = this.head
+    let c = 0
+    do {
+      const buf = p.data
+      if (n > buf.length) {
+        TypedArrayPrototypeSet(ret, buf, retLen - n)
+        n -= buf.length
+      } else {
+        if (n === buf.length) {
+          TypedArrayPrototypeSet(ret, buf, retLen - n)
+          ++c
+          if (p.next) this.head = p.next
+          else this.head = this.tail = null
+        } else {
+          TypedArrayPrototypeSet(ret, new Uint8Array(buf.buffer, buf.byteOffset, n), retLen - n)
+          this.head = p
+          p.data = buf.slice(n)
+        }
+        break
+      }
+      ++c
+    } while ((p = p.next) !== null)
+    this.length -= c
+    return ret
+  }
+
+  // Make sure the linked list only shows the minimal necessary information.
+  [Symbol.for('nodejs.util.inspect.custom')](_, options) {
+    return inspect(this, {
+      ...options,
+      // Only inspect one level.
+      depth: 0,
+      // It should not recurse.
+      customInspect: false
+    })
+  }
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/compose.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/compose.js
new file mode 100644
index 0000000..b399d54
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/compose.js
@@ -0,0 +1,194 @@
+'use strict'
+
+const { pipeline } = require('./pipeline')
+const Duplex = require('./duplex')
+const { destroyer } = require('./destroy')
+const {
+  isNodeStream,
+  isReadable,
+  isWritable,
+  isWebStream,
+  isTransformStream,
+  isWritableStream,
+  isReadableStream
+} = require('./utils')
+const {
+  AbortError,
+  codes: { ERR_INVALID_ARG_VALUE, ERR_MISSING_ARGS }
+} = require('../../ours/errors')
+const eos = require('./end-of-stream')
+module.exports = function compose(...streams) {
+  if (streams.length === 0) {
+    throw new ERR_MISSING_ARGS('streams')
+  }
+  if (streams.length === 1) {
+    return Duplex.from(streams[0])
+  }
+  const orgStreams = [...streams]
+  if (typeof streams[0] === 'function') {
+    streams[0] = Duplex.from(streams[0])
+  }
+  if (typeof streams[streams.length - 1] === 'function') {
+    const idx = streams.length - 1
+    streams[idx] = Duplex.from(streams[idx])
+  }
+  for (let n = 0; n < streams.length; ++n) {
+    if (!isNodeStream(streams[n]) && !isWebStream(streams[n])) {
+      // TODO(ronag): Add checks for non streams.
+      continue
+    }
+    if (
+      n < streams.length - 1 &&
+      !(isReadable(streams[n]) || isReadableStream(streams[n]) || isTransformStream(streams[n]))
+    ) {
+      throw new ERR_INVALID_ARG_VALUE(`streams[${n}]`, orgStreams[n], 'must be readable')
+    }
+    if (n > 0 && !(isWritable(streams[n]) || isWritableStream(streams[n]) || isTransformStream(streams[n]))) {
+      throw new ERR_INVALID_ARG_VALUE(`streams[${n}]`, orgStreams[n], 'must be writable')
+    }
+  }
+  let ondrain
+  let onfinish
+  let onreadable
+  let onclose
+  let d
+  function onfinished(err) {
+    const cb = onclose
+    onclose = null
+    if (cb) {
+      cb(err)
+    } else if (err) {
+      d.destroy(err)
+    } else if (!readable && !writable) {
+      d.destroy()
+    }
+  }
+  const head = streams[0]
+  const tail = pipeline(streams, onfinished)
+  const writable = !!(isWritable(head) || isWritableStream(head) || isTransformStream(head))
+  const readable = !!(isReadable(tail) || isReadableStream(tail) || isTransformStream(tail))
+
+  // TODO(ronag): Avoid double buffering.
+  // Implement Writable/Readable/Duplex traits.
+  // See, https://github.com/nodejs/node/pull/33515.
+  d = new Duplex({
+    // TODO (ronag): highWaterMark?
+    writableObjectMode: !!(head !== null && head !== undefined && head.writableObjectMode),
+    readableObjectMode: !!(tail !== null && tail !== undefined && tail.readableObjectMode),
+    writable,
+    readable
+  })
+  if (writable) {
+    if (isNodeStream(head)) {
+      d._write = function (chunk, encoding, callback) {
+        if (head.write(chunk, encoding)) {
+          callback()
+        } else {
+          ondrain = callback
+        }
+      }
+      d._final = function (callback) {
+        head.end()
+        onfinish = callback
+      }
+      head.on('drain', function () {
+        if (ondrain) {
+          const cb = ondrain
+          ondrain = null
+          cb()
+        }
+      })
+    } else if (isWebStream(head)) {
+      const writable = isTransformStream(head) ? head.writable : head
+      const writer = writable.getWriter()
+      d._write = async function (chunk, encoding, callback) {
+        try {
+          await writer.ready
+          writer.write(chunk).catch(() => {})
+          callback()
+        } catch (err) {
+          callback(err)
+        }
+      }
+      d._final = async function (callback) {
+        try {
+          await writer.ready
+          writer.close().catch(() => {})
+          onfinish = callback
+        } catch (err) {
+          callback(err)
+        }
+      }
+    }
+    const toRead = isTransformStream(tail) ? tail.readable : tail
+    eos(toRead, () => {
+      if (onfinish) {
+        const cb = onfinish
+        onfinish = null
+        cb()
+      }
+    })
+  }
+  if (readable) {
+    if (isNodeStream(tail)) {
+      tail.on('readable', function () {
+        if (onreadable) {
+          const cb = onreadable
+          onreadable = null
+          cb()
+        }
+      })
+      tail.on('end', function () {
+        d.push(null)
+      })
+      d._read = function () {
+        while (true) {
+          const buf = tail.read()
+          if (buf === null) {
+            onreadable = d._read
+            return
+          }
+          if (!d.push(buf)) {
+            return
+          }
+        }
+      }
+    } else if (isWebStream(tail)) {
+      const readable = isTransformStream(tail) ? tail.readable : tail
+      const reader = readable.getReader()
+      d._read = async function () {
+        while (true) {
+          try {
+            const { value, done } = await reader.read()
+            if (!d.push(value)) {
+              return
+            }
+            if (done) {
+              d.push(null)
+              return
+            }
+          } catch {
+            return
+          }
+        }
+      }
+    }
+  }
+  d._destroy = function (err, callback) {
+    if (!err && onclose !== null) {
+      err = new AbortError()
+    }
+    onreadable = null
+    ondrain = null
+    onfinish = null
+    if (onclose === null) {
+      callback(err)
+    } else {
+      onclose = callback
+      if (isNodeStream(tail)) {
+        destroyer(tail, err)
+      }
+    }
+  }
+  return d
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/destroy.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/destroy.js
new file mode 100644
index 0000000..3829231
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/destroy.js
@@ -0,0 +1,290 @@
+'use strict'
+
+/* replacement start */
+
+const process = require('process/')
+
+/* replacement end */
+
+const {
+  aggregateTwoErrors,
+  codes: { ERR_MULTIPLE_CALLBACK },
+  AbortError
+} = require('../../ours/errors')
+const { Symbol } = require('../../ours/primordials')
+const { kIsDestroyed, isDestroyed, isFinished, isServerRequest } = require('./utils')
+const kDestroy = Symbol('kDestroy')
+const kConstruct = Symbol('kConstruct')
+function checkError(err, w, r) {
+  if (err) {
+    // Avoid V8 leak, https://github.com/nodejs/node/pull/34103#issuecomment-652002364
+    err.stack // eslint-disable-line no-unused-expressions
+
+    if (w && !w.errored) {
+      w.errored = err
+    }
+    if (r && !r.errored) {
+      r.errored = err
+    }
+  }
+}
+
+// Backwards compat. cb() is undocumented and unused in core but
+// unfortunately might be used by modules.
+function destroy(err, cb) {
+  const r = this._readableState
+  const w = this._writableState
+  // With duplex streams we use the writable side for state.
+  const s = w || r
+  if ((w !== null && w !== undefined && w.destroyed) || (r !== null && r !== undefined && r.destroyed)) {
+    if (typeof cb === 'function') {
+      cb()
+    }
+    return this
+  }
+
+  // We set destroyed to true before firing error callbacks in order
+  // to make it re-entrance safe in case destroy() is called within callbacks
+  checkError(err, w, r)
+  if (w) {
+    w.destroyed = true
+  }
+  if (r) {
+    r.destroyed = true
+  }
+
+  // If still constructing then defer calling _destroy.
+  if (!s.constructed) {
+    this.once(kDestroy, function (er) {
+      _destroy(this, aggregateTwoErrors(er, err), cb)
+    })
+  } else {
+    _destroy(this, err, cb)
+  }
+  return this
+}
+function _destroy(self, err, cb) {
+  let called = false
+  function onDestroy(err) {
+    if (called) {
+      return
+    }
+    called = true
+    const r = self._readableState
+    const w = self._writableState
+    checkError(err, w, r)
+    if (w) {
+      w.closed = true
+    }
+    if (r) {
+      r.closed = true
+    }
+    if (typeof cb === 'function') {
+      cb(err)
+    }
+    if (err) {
+      process.nextTick(emitErrorCloseNT, self, err)
+    } else {
+      process.nextTick(emitCloseNT, self)
+    }
+  }
+  try {
+    self._destroy(err || null, onDestroy)
+  } catch (err) {
+    onDestroy(err)
+  }
+}
+function emitErrorCloseNT(self, err) {
+  emitErrorNT(self, err)
+  emitCloseNT(self)
+}
+function emitCloseNT(self) {
+  const r = self._readableState
+  const w = self._writableState
+  if (w) {
+    w.closeEmitted = true
+  }
+  if (r) {
+    r.closeEmitted = true
+  }
+  if ((w !== null && w !== undefined && w.emitClose) || (r !== null && r !== undefined && r.emitClose)) {
+    self.emit('close')
+  }
+}
+function emitErrorNT(self, err) {
+  const r = self._readableState
+  const w = self._writableState
+  if ((w !== null && w !== undefined && w.errorEmitted) || (r !== null && r !== undefined && r.errorEmitted)) {
+    return
+  }
+  if (w) {
+    w.errorEmitted = true
+  }
+  if (r) {
+    r.errorEmitted = true
+  }
+  self.emit('error', err)
+}
+function undestroy() {
+  const r = this._readableState
+  const w = this._writableState
+  if (r) {
+    r.constructed = true
+    r.closed = false
+    r.closeEmitted = false
+    r.destroyed = false
+    r.errored = null
+    r.errorEmitted = false
+    r.reading = false
+    r.ended = r.readable === false
+    r.endEmitted = r.readable === false
+  }
+  if (w) {
+    w.constructed = true
+    w.destroyed = false
+    w.closed = false
+    w.closeEmitted = false
+    w.errored = null
+    w.errorEmitted = false
+    w.finalCalled = false
+    w.prefinished = false
+    w.ended = w.writable === false
+    w.ending = w.writable === false
+    w.finished = w.writable === false
+  }
+}
+function errorOrDestroy(stream, err, sync) {
+  // We have tests that rely on errors being emitted
+  // in the same tick, so changing this is semver major.
+  // For now when you opt-in to autoDestroy we allow
+  // the error to be emitted nextTick. In a future
+  // semver major update we should change the default to this.
+
+  const r = stream._readableState
+  const w = stream._writableState
+  if ((w !== null && w !== undefined && w.destroyed) || (r !== null && r !== undefined && r.destroyed)) {
+    return this
+  }
+  if ((r !== null && r !== undefined && r.autoDestroy) || (w !== null && w !== undefined && w.autoDestroy))
+    stream.destroy(err)
+  else if (err) {
+    // Avoid V8 leak, https://github.com/nodejs/node/pull/34103#issuecomment-652002364
+    err.stack // eslint-disable-line no-unused-expressions
+
+    if (w && !w.errored) {
+      w.errored = err
+    }
+    if (r && !r.errored) {
+      r.errored = err
+    }
+    if (sync) {
+      process.nextTick(emitErrorNT, stream, err)
+    } else {
+      emitErrorNT(stream, err)
+    }
+  }
+}
+function construct(stream, cb) {
+  if (typeof stream._construct !== 'function') {
+    return
+  }
+  const r = stream._readableState
+  const w = stream._writableState
+  if (r) {
+    r.constructed = false
+  }
+  if (w) {
+    w.constructed = false
+  }
+  stream.once(kConstruct, cb)
+  if (stream.listenerCount(kConstruct) > 1) {
+    // Duplex
+    return
+  }
+  process.nextTick(constructNT, stream)
+}
+function constructNT(stream) {
+  let called = false
+  function onConstruct(err) {
+    if (called) {
+      errorOrDestroy(stream, err !== null && err !== undefined ? err : new ERR_MULTIPLE_CALLBACK())
+      return
+    }
+    called = true
+    const r = stream._readableState
+    const w = stream._writableState
+    const s = w || r
+    if (r) {
+      r.constructed = true
+    }
+    if (w) {
+      w.constructed = true
+    }
+    if (s.destroyed) {
+      stream.emit(kDestroy, err)
+    } else if (err) {
+      errorOrDestroy(stream, err, true)
+    } else {
+      process.nextTick(emitConstructNT, stream)
+    }
+  }
+  try {
+    stream._construct((err) => {
+      process.nextTick(onConstruct, err)
+    })
+  } catch (err) {
+    process.nextTick(onConstruct, err)
+  }
+}
+function emitConstructNT(stream) {
+  stream.emit(kConstruct)
+}
+function isRequest(stream) {
+  return (stream === null || stream === undefined ? undefined : stream.setHeader) && typeof stream.abort === 'function'
+}
+function emitCloseLegacy(stream) {
+  stream.emit('close')
+}
+function emitErrorCloseLegacy(stream, err) {
+  stream.emit('error', err)
+  process.nextTick(emitCloseLegacy, stream)
+}
+
+// Normalize destroy for legacy.
+function destroyer(stream, err) {
+  if (!stream || isDestroyed(stream)) {
+    return
+  }
+  if (!err && !isFinished(stream)) {
+    err = new AbortError()
+  }
+
+  // TODO: Remove isRequest branches.
+  if (isServerRequest(stream)) {
+    stream.socket = null
+    stream.destroy(err)
+  } else if (isRequest(stream)) {
+    stream.abort()
+  } else if (isRequest(stream.req)) {
+    stream.req.abort()
+  } else if (typeof stream.destroy === 'function') {
+    stream.destroy(err)
+  } else if (typeof stream.close === 'function') {
+    // TODO: Don't lose err?
+    stream.close()
+  } else if (err) {
+    process.nextTick(emitErrorCloseLegacy, stream, err)
+  } else {
+    process.nextTick(emitCloseLegacy, stream)
+  }
+  if (!stream.destroyed) {
+    stream[kIsDestroyed] = true
+  }
+}
+module.exports = {
+  construct,
+  destroyer,
+  destroy,
+  undestroy,
+  errorOrDestroy
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/duplex.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/duplex.js
new file mode 100644
index 0000000..dd08396
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/duplex.js
@@ -0,0 +1,143 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a duplex stream is just a stream that is both readable and writable.
+// Since JS doesn't have multiple prototype inheritance, this class
+// prototypically inherits from Readable, and then parasitically from
+// Writable.
+
+'use strict'
+
+const {
+  ObjectDefineProperties,
+  ObjectGetOwnPropertyDescriptor,
+  ObjectKeys,
+  ObjectSetPrototypeOf
+} = require('../../ours/primordials')
+module.exports = Duplex
+const Readable = require('./readable')
+const Writable = require('./writable')
+ObjectSetPrototypeOf(Duplex.prototype, Readable.prototype)
+ObjectSetPrototypeOf(Duplex, Readable)
+{
+  const keys = ObjectKeys(Writable.prototype)
+  // Allow the keys array to be GC'ed.
+  for (let i = 0; i < keys.length; i++) {
+    const method = keys[i]
+    if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method]
+  }
+}
+function Duplex(options) {
+  if (!(this instanceof Duplex)) return new Duplex(options)
+  Readable.call(this, options)
+  Writable.call(this, options)
+  if (options) {
+    this.allowHalfOpen = options.allowHalfOpen !== false
+    if (options.readable === false) {
+      this._readableState.readable = false
+      this._readableState.ended = true
+      this._readableState.endEmitted = true
+    }
+    if (options.writable === false) {
+      this._writableState.writable = false
+      this._writableState.ending = true
+      this._writableState.ended = true
+      this._writableState.finished = true
+    }
+  } else {
+    this.allowHalfOpen = true
+  }
+}
+ObjectDefineProperties(Duplex.prototype, {
+  writable: {
+    __proto__: null,
+    ...ObjectGetOwnPropertyDescriptor(Writable.prototype, 'writable')
+  },
+  writableHighWaterMark: {
+    __proto__: null,
+    ...ObjectGetOwnPropertyDescriptor(Writable.prototype, 'writableHighWaterMark')
+  },
+  writableObjectMode: {
+    __proto__: null,
+    ...ObjectGetOwnPropertyDescriptor(Writable.prototype, 'writableObjectMode')
+  },
+  writableBuffer: {
+    __proto__: null,
+    ...ObjectGetOwnPropertyDescriptor(Writable.prototype, 'writableBuffer')
+  },
+  writableLength: {
+    __proto__: null,
+    ...ObjectGetOwnPropertyDescriptor(Writable.prototype, 'writableLength')
+  },
+  writableFinished: {
+    __proto__: null,
+    ...ObjectGetOwnPropertyDescriptor(Writable.prototype, 'writableFinished')
+  },
+  writableCorked: {
+    __proto__: null,
+    ...ObjectGetOwnPropertyDescriptor(Writable.prototype, 'writableCorked')
+  },
+  writableEnded: {
+    __proto__: null,
+    ...ObjectGetOwnPropertyDescriptor(Writable.prototype, 'writableEnded')
+  },
+  writableNeedDrain: {
+    __proto__: null,
+    ...ObjectGetOwnPropertyDescriptor(Writable.prototype, 'writableNeedDrain')
+  },
+  destroyed: {
+    __proto__: null,
+    get() {
+      if (this._readableState === undefined || this._writableState === undefined) {
+        return false
+      }
+      return this._readableState.destroyed && this._writableState.destroyed
+    },
+    set(value) {
+      // Backward compatibility, the user is explicitly
+      // managing destroyed.
+      if (this._readableState && this._writableState) {
+        this._readableState.destroyed = value
+        this._writableState.destroyed = value
+      }
+    }
+  }
+})
+let webStreamsAdapters
+
+// Lazy to avoid circular references
+function lazyWebStreams() {
+  if (webStreamsAdapters === undefined) webStreamsAdapters = {}
+  return webStreamsAdapters
+}
+Duplex.fromWeb = function (pair, options) {
+  return lazyWebStreams().newStreamDuplexFromReadableWritablePair(pair, options)
+}
+Duplex.toWeb = function (duplex) {
+  return lazyWebStreams().newReadableWritablePairFromDuplex(duplex)
+}
+let duplexify
+Duplex.from = function (body) {
+  if (!duplexify) {
+    duplexify = require('./duplexify')
+  }
+  return duplexify(body, 'body')
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/duplexify.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/duplexify.js
new file mode 100644
index 0000000..05740d7
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/duplexify.js
@@ -0,0 +1,378 @@
+/* replacement start */
+
+const process = require('process/')
+
+/* replacement end */
+
+;('use strict')
+const bufferModule = require('buffer')
+const {
+  isReadable,
+  isWritable,
+  isIterable,
+  isNodeStream,
+  isReadableNodeStream,
+  isWritableNodeStream,
+  isDuplexNodeStream,
+  isReadableStream,
+  isWritableStream
+} = require('./utils')
+const eos = require('./end-of-stream')
+const {
+  AbortError,
+  codes: { ERR_INVALID_ARG_TYPE, ERR_INVALID_RETURN_VALUE }
+} = require('../../ours/errors')
+const { destroyer } = require('./destroy')
+const Duplex = require('./duplex')
+const Readable = require('./readable')
+const Writable = require('./writable')
+const { createDeferredPromise } = require('../../ours/util')
+const from = require('./from')
+const Blob = globalThis.Blob || bufferModule.Blob
+const isBlob =
+  typeof Blob !== 'undefined'
+    ? function isBlob(b) {
+        return b instanceof Blob
+      }
+    : function isBlob(b) {
+        return false
+      }
+const AbortController = globalThis.AbortController || require('abort-controller').AbortController
+const { FunctionPrototypeCall } = require('../../ours/primordials')
+
+// This is needed for pre node 17.
+class Duplexify extends Duplex {
+  constructor(options) {
+    super(options)
+
+    // https://github.com/nodejs/node/pull/34385
+
+    if ((options === null || options === undefined ? undefined : options.readable) === false) {
+      this._readableState.readable = false
+      this._readableState.ended = true
+      this._readableState.endEmitted = true
+    }
+    if ((options === null || options === undefined ? undefined : options.writable) === false) {
+      this._writableState.writable = false
+      this._writableState.ending = true
+      this._writableState.ended = true
+      this._writableState.finished = true
+    }
+  }
+}
+module.exports = function duplexify(body, name) {
+  if (isDuplexNodeStream(body)) {
+    return body
+  }
+  if (isReadableNodeStream(body)) {
+    return _duplexify({
+      readable: body
+    })
+  }
+  if (isWritableNodeStream(body)) {
+    return _duplexify({
+      writable: body
+    })
+  }
+  if (isNodeStream(body)) {
+    return _duplexify({
+      writable: false,
+      readable: false
+    })
+  }
+  if (isReadableStream(body)) {
+    return _duplexify({
+      readable: Readable.fromWeb(body)
+    })
+  }
+  if (isWritableStream(body)) {
+    return _duplexify({
+      writable: Writable.fromWeb(body)
+    })
+  }
+  if (typeof body === 'function') {
+    const { value, write, final, destroy } = fromAsyncGen(body)
+    if (isIterable(value)) {
+      return from(Duplexify, value, {
+        // TODO (ronag): highWaterMark?
+        objectMode: true,
+        write,
+        final,
+        destroy
+      })
+    }
+    const then = value === null || value === undefined ? undefined : value.then
+    if (typeof then === 'function') {
+      let d
+      const promise = FunctionPrototypeCall(
+        then,
+        value,
+        (val) => {
+          if (val != null) {
+            throw new ERR_INVALID_RETURN_VALUE('nully', 'body', val)
+          }
+        },
+        (err) => {
+          destroyer(d, err)
+        }
+      )
+      return (d = new Duplexify({
+        // TODO (ronag): highWaterMark?
+        objectMode: true,
+        readable: false,
+        write,
+        final(cb) {
+          final(async () => {
+            try {
+              await promise
+              process.nextTick(cb, null)
+            } catch (err) {
+              process.nextTick(cb, err)
+            }
+          })
+        },
+        destroy
+      }))
+    }
+    throw new ERR_INVALID_RETURN_VALUE('Iterable, AsyncIterable or AsyncFunction', name, value)
+  }
+  if (isBlob(body)) {
+    return duplexify(body.arrayBuffer())
+  }
+  if (isIterable(body)) {
+    return from(Duplexify, body, {
+      // TODO (ronag): highWaterMark?
+      objectMode: true,
+      writable: false
+    })
+  }
+  if (
+    isReadableStream(body === null || body === undefined ? undefined : body.readable) &&
+    isWritableStream(body === null || body === undefined ? undefined : body.writable)
+  ) {
+    return Duplexify.fromWeb(body)
+  }
+  if (
+    typeof (body === null || body === undefined ? undefined : body.writable) === 'object' ||
+    typeof (body === null || body === undefined ? undefined : body.readable) === 'object'
+  ) {
+    const readable =
+      body !== null && body !== undefined && body.readable
+        ? isReadableNodeStream(body === null || body === undefined ? undefined : body.readable)
+          ? body === null || body === undefined
+            ? undefined
+            : body.readable
+          : duplexify(body.readable)
+        : undefined
+    const writable =
+      body !== null && body !== undefined && body.writable
+        ? isWritableNodeStream(body === null || body === undefined ? undefined : body.writable)
+          ? body === null || body === undefined
+            ? undefined
+            : body.writable
+          : duplexify(body.writable)
+        : undefined
+    return _duplexify({
+      readable,
+      writable
+    })
+  }
+  const then = body === null || body === undefined ? undefined : body.then
+  if (typeof then === 'function') {
+    let d
+    FunctionPrototypeCall(
+      then,
+      body,
+      (val) => {
+        if (val != null) {
+          d.push(val)
+        }
+        d.push(null)
+      },
+      (err) => {
+        destroyer(d, err)
+      }
+    )
+    return (d = new Duplexify({
+      objectMode: true,
+      writable: false,
+      read() {}
+    }))
+  }
+  throw new ERR_INVALID_ARG_TYPE(
+    name,
+    [
+      'Blob',
+      'ReadableStream',
+      'WritableStream',
+      'Stream',
+      'Iterable',
+      'AsyncIterable',
+      'Function',
+      '{ readable, writable } pair',
+      'Promise'
+    ],
+    body
+  )
+}
+function fromAsyncGen(fn) {
+  let { promise, resolve } = createDeferredPromise()
+  const ac = new AbortController()
+  const signal = ac.signal
+  const value = fn(
+    (async function* () {
+      while (true) {
+        const _promise = promise
+        promise = null
+        const { chunk, done, cb } = await _promise
+        process.nextTick(cb)
+        if (done) return
+        if (signal.aborted)
+          throw new AbortError(undefined, {
+            cause: signal.reason
+          })
+        ;({ promise, resolve } = createDeferredPromise())
+        yield chunk
+      }
+    })(),
+    {
+      signal
+    }
+  )
+  return {
+    value,
+    write(chunk, encoding, cb) {
+      const _resolve = resolve
+      resolve = null
+      _resolve({
+        chunk,
+        done: false,
+        cb
+      })
+    },
+    final(cb) {
+      const _resolve = resolve
+      resolve = null
+      _resolve({
+        done: true,
+        cb
+      })
+    },
+    destroy(err, cb) {
+      ac.abort()
+      cb(err)
+    }
+  }
+}
+function _duplexify(pair) {
+  const r = pair.readable && typeof pair.readable.read !== 'function' ? Readable.wrap(pair.readable) : pair.readable
+  const w = pair.writable
+  let readable = !!isReadable(r)
+  let writable = !!isWritable(w)
+  let ondrain
+  let onfinish
+  let onreadable
+  let onclose
+  let d
+  function onfinished(err) {
+    const cb = onclose
+    onclose = null
+    if (cb) {
+      cb(err)
+    } else if (err) {
+      d.destroy(err)
+    }
+  }
+
+  // TODO(ronag): Avoid double buffering.
+  // Implement Writable/Readable/Duplex traits.
+  // See, https://github.com/nodejs/node/pull/33515.
+  d = new Duplexify({
+    // TODO (ronag): highWaterMark?
+    readableObjectMode: !!(r !== null && r !== undefined && r.readableObjectMode),
+    writableObjectMode: !!(w !== null && w !== undefined && w.writableObjectMode),
+    readable,
+    writable
+  })
+  if (writable) {
+    eos(w, (err) => {
+      writable = false
+      if (err) {
+        destroyer(r, err)
+      }
+      onfinished(err)
+    })
+    d._write = function (chunk, encoding, callback) {
+      if (w.write(chunk, encoding)) {
+        callback()
+      } else {
+        ondrain = callback
+      }
+    }
+    d._final = function (callback) {
+      w.end()
+      onfinish = callback
+    }
+    w.on('drain', function () {
+      if (ondrain) {
+        const cb = ondrain
+        ondrain = null
+        cb()
+      }
+    })
+    w.on('finish', function () {
+      if (onfinish) {
+        const cb = onfinish
+        onfinish = null
+        cb()
+      }
+    })
+  }
+  if (readable) {
+    eos(r, (err) => {
+      readable = false
+      if (err) {
+        destroyer(r, err)
+      }
+      onfinished(err)
+    })
+    r.on('readable', function () {
+      if (onreadable) {
+        const cb = onreadable
+        onreadable = null
+        cb()
+      }
+    })
+    r.on('end', function () {
+      d.push(null)
+    })
+    d._read = function () {
+      while (true) {
+        const buf = r.read()
+        if (buf === null) {
+          onreadable = d._read
+          return
+        }
+        if (!d.push(buf)) {
+          return
+        }
+      }
+    }
+  }
+  d._destroy = function (err, callback) {
+    if (!err && onclose !== null) {
+      err = new AbortError()
+    }
+    onreadable = null
+    ondrain = null
+    onfinish = null
+    if (onclose === null) {
+      callback(err)
+    } else {
+      onclose = callback
+      destroyer(w, err)
+      destroyer(r, err)
+    }
+  }
+  return d
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/end-of-stream.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/end-of-stream.js
new file mode 100644
index 0000000..94d1832
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/end-of-stream.js
@@ -0,0 +1,286 @@
+// Ported from https://github.com/mafintosh/end-of-stream with
+// permission from the author, Mathias Buus (@mafintosh).
+
+'use strict'
+
+/* replacement start */
+
+const process = require('process/')
+
+/* replacement end */
+
+const { AbortError, codes } = require('../../ours/errors')
+const { ERR_INVALID_ARG_TYPE, ERR_STREAM_PREMATURE_CLOSE } = codes
+const { kEmptyObject, once } = require('../../ours/util')
+const { validateAbortSignal, validateFunction, validateObject, validateBoolean } = require('../validators')
+const { Promise, PromisePrototypeThen, SymbolDispose } = require('../../ours/primordials')
+const {
+  isClosed,
+  isReadable,
+  isReadableNodeStream,
+  isReadableStream,
+  isReadableFinished,
+  isReadableErrored,
+  isWritable,
+  isWritableNodeStream,
+  isWritableStream,
+  isWritableFinished,
+  isWritableErrored,
+  isNodeStream,
+  willEmitClose: _willEmitClose,
+  kIsClosedPromise
+} = require('./utils')
+let addAbortListener
+function isRequest(stream) {
+  return stream.setHeader && typeof stream.abort === 'function'
+}
+const nop = () => {}
+function eos(stream, options, callback) {
+  var _options$readable, _options$writable
+  if (arguments.length === 2) {
+    callback = options
+    options = kEmptyObject
+  } else if (options == null) {
+    options = kEmptyObject
+  } else {
+    validateObject(options, 'options')
+  }
+  validateFunction(callback, 'callback')
+  validateAbortSignal(options.signal, 'options.signal')
+  callback = once(callback)
+  if (isReadableStream(stream) || isWritableStream(stream)) {
+    return eosWeb(stream, options, callback)
+  }
+  if (!isNodeStream(stream)) {
+    throw new ERR_INVALID_ARG_TYPE('stream', ['ReadableStream', 'WritableStream', 'Stream'], stream)
+  }
+  const readable =
+    (_options$readable = options.readable) !== null && _options$readable !== undefined
+      ? _options$readable
+      : isReadableNodeStream(stream)
+  const writable =
+    (_options$writable = options.writable) !== null && _options$writable !== undefined
+      ? _options$writable
+      : isWritableNodeStream(stream)
+  const wState = stream._writableState
+  const rState = stream._readableState
+  const onlegacyfinish = () => {
+    if (!stream.writable) {
+      onfinish()
+    }
+  }
+
+  // TODO (ronag): Improve soft detection to include core modules and
+  // common ecosystem modules that do properly emit 'close' but fail
+  // this generic check.
+  let willEmitClose =
+    _willEmitClose(stream) && isReadableNodeStream(stream) === readable && isWritableNodeStream(stream) === writable
+  let writableFinished = isWritableFinished(stream, false)
+  const onfinish = () => {
+    writableFinished = true
+    // Stream should not be destroyed here. If it is that
+    // means that user space is doing something differently and
+    // we cannot trust willEmitClose.
+    if (stream.destroyed) {
+      willEmitClose = false
+    }
+    if (willEmitClose && (!stream.readable || readable)) {
+      return
+    }
+    if (!readable || readableFinished) {
+      callback.call(stream)
+    }
+  }
+  let readableFinished = isReadableFinished(stream, false)
+  const onend = () => {
+    readableFinished = true
+    // Stream should not be destroyed here. If it is that
+    // means that user space is doing something differently and
+    // we cannot trust willEmitClose.
+    if (stream.destroyed) {
+      willEmitClose = false
+    }
+    if (willEmitClose && (!stream.writable || writable)) {
+      return
+    }
+    if (!writable || writableFinished) {
+      callback.call(stream)
+    }
+  }
+  const onerror = (err) => {
+    callback.call(stream, err)
+  }
+  let closed = isClosed(stream)
+  const onclose = () => {
+    closed = true
+    const errored = isWritableErrored(stream) || isReadableErrored(stream)
+    if (errored && typeof errored !== 'boolean') {
+      return callback.call(stream, errored)
+    }
+    if (readable && !readableFinished && isReadableNodeStream(stream, true)) {
+      if (!isReadableFinished(stream, false)) return callback.call(stream, new ERR_STREAM_PREMATURE_CLOSE())
+    }
+    if (writable && !writableFinished) {
+      if (!isWritableFinished(stream, false)) return callback.call(stream, new ERR_STREAM_PREMATURE_CLOSE())
+    }
+    callback.call(stream)
+  }
+  const onclosed = () => {
+    closed = true
+    const errored = isWritableErrored(stream) || isReadableErrored(stream)
+    if (errored && typeof errored !== 'boolean') {
+      return callback.call(stream, errored)
+    }
+    callback.call(stream)
+  }
+  const onrequest = () => {
+    stream.req.on('finish', onfinish)
+  }
+  if (isRequest(stream)) {
+    stream.on('complete', onfinish)
+    if (!willEmitClose) {
+      stream.on('abort', onclose)
+    }
+    if (stream.req) {
+      onrequest()
+    } else {
+      stream.on('request', onrequest)
+    }
+  } else if (writable && !wState) {
+    // legacy streams
+    stream.on('end', onlegacyfinish)
+    stream.on('close', onlegacyfinish)
+  }
+
+  // Not all streams will emit 'close' after 'aborted'.
+  if (!willEmitClose && typeof stream.aborted === 'boolean') {
+    stream.on('aborted', onclose)
+  }
+  stream.on('end', onend)
+  stream.on('finish', onfinish)
+  if (options.error !== false) {
+    stream.on('error', onerror)
+  }
+  stream.on('close', onclose)
+  if (closed) {
+    process.nextTick(onclose)
+  } else if (
+    (wState !== null && wState !== undefined && wState.errorEmitted) ||
+    (rState !== null && rState !== undefined && rState.errorEmitted)
+  ) {
+    if (!willEmitClose) {
+      process.nextTick(onclosed)
+    }
+  } else if (
+    !readable &&
+    (!willEmitClose || isReadable(stream)) &&
+    (writableFinished || isWritable(stream) === false)
+  ) {
+    process.nextTick(onclosed)
+  } else if (
+    !writable &&
+    (!willEmitClose || isWritable(stream)) &&
+    (readableFinished || isReadable(stream) === false)
+  ) {
+    process.nextTick(onclosed)
+  } else if (rState && stream.req && stream.aborted) {
+    process.nextTick(onclosed)
+  }
+  const cleanup = () => {
+    callback = nop
+    stream.removeListener('aborted', onclose)
+    stream.removeListener('complete', onfinish)
+    stream.removeListener('abort', onclose)
+    stream.removeListener('request', onrequest)
+    if (stream.req) stream.req.removeListener('finish', onfinish)
+    stream.removeListener('end', onlegacyfinish)
+    stream.removeListener('close', onlegacyfinish)
+    stream.removeListener('finish', onfinish)
+    stream.removeListener('end', onend)
+    stream.removeListener('error', onerror)
+    stream.removeListener('close', onclose)
+  }
+  if (options.signal && !closed) {
+    const abort = () => {
+      // Keep it because cleanup removes it.
+      const endCallback = callback
+      cleanup()
+      endCallback.call(
+        stream,
+        new AbortError(undefined, {
+          cause: options.signal.reason
+        })
+      )
+    }
+    if (options.signal.aborted) {
+      process.nextTick(abort)
+    } else {
+      addAbortListener = addAbortListener || require('../../ours/util').addAbortListener
+      const disposable = addAbortListener(options.signal, abort)
+      const originalCallback = callback
+      callback = once((...args) => {
+        disposable[SymbolDispose]()
+        originalCallback.apply(stream, args)
+      })
+    }
+  }
+  return cleanup
+}
+function eosWeb(stream, options, callback) {
+  let isAborted = false
+  let abort = nop
+  if (options.signal) {
+    abort = () => {
+      isAborted = true
+      callback.call(
+        stream,
+        new AbortError(undefined, {
+          cause: options.signal.reason
+        })
+      )
+    }
+    if (options.signal.aborted) {
+      process.nextTick(abort)
+    } else {
+      addAbortListener = addAbortListener || require('../../ours/util').addAbortListener
+      const disposable = addAbortListener(options.signal, abort)
+      const originalCallback = callback
+      callback = once((...args) => {
+        disposable[SymbolDispose]()
+        originalCallback.apply(stream, args)
+      })
+    }
+  }
+  const resolverFn = (...args) => {
+    if (!isAborted) {
+      process.nextTick(() => callback.apply(stream, args))
+    }
+  }
+  PromisePrototypeThen(stream[kIsClosedPromise].promise, resolverFn, resolverFn)
+  return nop
+}
+function finished(stream, opts) {
+  var _opts
+  let autoCleanup = false
+  if (opts === null) {
+    opts = kEmptyObject
+  }
+  if ((_opts = opts) !== null && _opts !== undefined && _opts.cleanup) {
+    validateBoolean(opts.cleanup, 'cleanup')
+    autoCleanup = opts.cleanup
+  }
+  return new Promise((resolve, reject) => {
+    const cleanup = eos(stream, opts, (err) => {
+      if (autoCleanup) {
+        cleanup()
+      }
+      if (err) {
+        reject(err)
+      } else {
+        resolve()
+      }
+    })
+  })
+}
+module.exports = eos
+module.exports.finished = finished
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/from.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/from.js
new file mode 100644
index 0000000..c7e7531
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/from.js
@@ -0,0 +1,98 @@
+'use strict'
+
+/* replacement start */
+
+const process = require('process/')
+
+/* replacement end */
+
+const { PromisePrototypeThen, SymbolAsyncIterator, SymbolIterator } = require('../../ours/primordials')
+const { Buffer } = require('buffer')
+const { ERR_INVALID_ARG_TYPE, ERR_STREAM_NULL_VALUES } = require('../../ours/errors').codes
+function from(Readable, iterable, opts) {
+  let iterator
+  if (typeof iterable === 'string' || iterable instanceof Buffer) {
+    return new Readable({
+      objectMode: true,
+      ...opts,
+      read() {
+        this.push(iterable)
+        this.push(null)
+      }
+    })
+  }
+  let isAsync
+  if (iterable && iterable[SymbolAsyncIterator]) {
+    isAsync = true
+    iterator = iterable[SymbolAsyncIterator]()
+  } else if (iterable && iterable[SymbolIterator]) {
+    isAsync = false
+    iterator = iterable[SymbolIterator]()
+  } else {
+    throw new ERR_INVALID_ARG_TYPE('iterable', ['Iterable'], iterable)
+  }
+  const readable = new Readable({
+    objectMode: true,
+    highWaterMark: 1,
+    // TODO(ronag): What options should be allowed?
+    ...opts
+  })
+
+  // Flag to protect against _read
+  // being called before last iteration completion.
+  let reading = false
+  readable._read = function () {
+    if (!reading) {
+      reading = true
+      next()
+    }
+  }
+  readable._destroy = function (error, cb) {
+    PromisePrototypeThen(
+      close(error),
+      () => process.nextTick(cb, error),
+      // nextTick is here in case cb throws
+      (e) => process.nextTick(cb, e || error)
+    )
+  }
+  async function close(error) {
+    const hadError = error !== undefined && error !== null
+    const hasThrow = typeof iterator.throw === 'function'
+    if (hadError && hasThrow) {
+      const { value, done } = await iterator.throw(error)
+      await value
+      if (done) {
+        return
+      }
+    }
+    if (typeof iterator.return === 'function') {
+      const { value } = await iterator.return()
+      await value
+    }
+  }
+  async function next() {
+    for (;;) {
+      try {
+        const { value, done } = isAsync ? await iterator.next() : iterator.next()
+        if (done) {
+          readable.push(null)
+        } else {
+          const res = value && typeof value.then === 'function' ? await value : value
+          if (res === null) {
+            reading = false
+            throw new ERR_STREAM_NULL_VALUES()
+          } else if (readable.push(res)) {
+            continue
+          } else {
+            reading = false
+          }
+        }
+      } catch (err) {
+        readable.destroy(err)
+      }
+      break
+    }
+  }
+  return readable
+}
+module.exports = from
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/lazy_transform.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/lazy_transform.js
new file mode 100644
index 0000000..439461a
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/lazy_transform.js
@@ -0,0 +1,51 @@
+// LazyTransform is a special type of Transform stream that is lazily loaded.
+// This is used for performance with bi-API-ship: when two APIs are available
+// for the stream, one conventional and one non-conventional.
+'use strict'
+
+const { ObjectDefineProperties, ObjectDefineProperty, ObjectSetPrototypeOf } = require('../../ours/primordials')
+const stream = require('../../stream')
+const { getDefaultEncoding } = require('../crypto/util')
+module.exports = LazyTransform
+function LazyTransform(options) {
+  this._options = options
+}
+ObjectSetPrototypeOf(LazyTransform.prototype, stream.Transform.prototype)
+ObjectSetPrototypeOf(LazyTransform, stream.Transform)
+function makeGetter(name) {
+  return function () {
+    stream.Transform.call(this, this._options)
+    this._writableState.decodeStrings = false
+    if (!this._options || !this._options.defaultEncoding) {
+      this._writableState.defaultEncoding = getDefaultEncoding()
+    }
+    return this[name]
+  }
+}
+function makeSetter(name) {
+  return function (val) {
+    ObjectDefineProperty(this, name, {
+      __proto__: null,
+      value: val,
+      enumerable: true,
+      configurable: true,
+      writable: true
+    })
+  }
+}
+ObjectDefineProperties(LazyTransform.prototype, {
+  _readableState: {
+    __proto__: null,
+    get: makeGetter('_readableState'),
+    set: makeSetter('_readableState'),
+    configurable: true,
+    enumerable: true
+  },
+  _writableState: {
+    __proto__: null,
+    get: makeGetter('_writableState'),
+    set: makeSetter('_writableState'),
+    configurable: true,
+    enumerable: true
+  }
+})
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/legacy.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/legacy.js
new file mode 100644
index 0000000..d492f7f
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/legacy.js
@@ -0,0 +1,89 @@
+'use strict'
+
+const { ArrayIsArray, ObjectSetPrototypeOf } = require('../../ours/primordials')
+const { EventEmitter: EE } = require('events')
+function Stream(opts) {
+  EE.call(this, opts)
+}
+ObjectSetPrototypeOf(Stream.prototype, EE.prototype)
+ObjectSetPrototypeOf(Stream, EE)
+Stream.prototype.pipe = function (dest, options) {
+  const source = this
+  function ondata(chunk) {
+    if (dest.writable && dest.write(chunk) === false && source.pause) {
+      source.pause()
+    }
+  }
+  source.on('data', ondata)
+  function ondrain() {
+    if (source.readable && source.resume) {
+      source.resume()
+    }
+  }
+  dest.on('drain', ondrain)
+
+  // If the 'end' option is not supplied, dest.end() will be called when
+  // source gets the 'end' or 'close' events.  Only dest.end() once.
+  if (!dest._isStdio && (!options || options.end !== false)) {
+    source.on('end', onend)
+    source.on('close', onclose)
+  }
+  let didOnEnd = false
+  function onend() {
+    if (didOnEnd) return
+    didOnEnd = true
+    dest.end()
+  }
+  function onclose() {
+    if (didOnEnd) return
+    didOnEnd = true
+    if (typeof dest.destroy === 'function') dest.destroy()
+  }
+
+  // Don't leave dangling pipes when there are errors.
+  function onerror(er) {
+    cleanup()
+    if (EE.listenerCount(this, 'error') === 0) {
+      this.emit('error', er)
+    }
+  }
+  prependListener(source, 'error', onerror)
+  prependListener(dest, 'error', onerror)
+
+  // Remove all the event listeners that were added.
+  function cleanup() {
+    source.removeListener('data', ondata)
+    dest.removeListener('drain', ondrain)
+    source.removeListener('end', onend)
+    source.removeListener('close', onclose)
+    source.removeListener('error', onerror)
+    dest.removeListener('error', onerror)
+    source.removeListener('end', cleanup)
+    source.removeListener('close', cleanup)
+    dest.removeListener('close', cleanup)
+  }
+  source.on('end', cleanup)
+  source.on('close', cleanup)
+  dest.on('close', cleanup)
+  dest.emit('pipe', source)
+
+  // Allow for unix-like usage: A.pipe(B).pipe(C)
+  return dest
+}
+function prependListener(emitter, event, fn) {
+  // Sadly this is not cacheable as some libraries bundle their own
+  // event emitter implementation with them.
+  if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn)
+
+  // This is a hack to make sure that our error handler is attached before any
+  // userland ones.  NEVER DO THIS. This is here only because this code needs
+  // to continue to work with older versions of Node.js that do not include
+  // the prependListener() method. The goal is to eventually remove this hack.
+  if (!emitter._events || !emitter._events[event]) emitter.on(event, fn)
+  else if (ArrayIsArray(emitter._events[event])) emitter._events[event].unshift(fn)
+  else emitter._events[event] = [fn, emitter._events[event]]
+}
+module.exports = {
+  Stream,
+  prependListener
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/operators.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/operators.js
new file mode 100644
index 0000000..7eff110
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/operators.js
@@ -0,0 +1,457 @@
+'use strict'
+
+const AbortController = globalThis.AbortController || require('abort-controller').AbortController
+const {
+  codes: { ERR_INVALID_ARG_VALUE, ERR_INVALID_ARG_TYPE, ERR_MISSING_ARGS, ERR_OUT_OF_RANGE },
+  AbortError
+} = require('../../ours/errors')
+const { validateAbortSignal, validateInteger, validateObject } = require('../validators')
+const kWeakHandler = require('../../ours/primordials').Symbol('kWeak')
+const kResistStopPropagation = require('../../ours/primordials').Symbol('kResistStopPropagation')
+const { finished } = require('./end-of-stream')
+const staticCompose = require('./compose')
+const { addAbortSignalNoValidate } = require('./add-abort-signal')
+const { isWritable, isNodeStream } = require('./utils')
+const { deprecate } = require('../../ours/util')
+const {
+  ArrayPrototypePush,
+  Boolean,
+  MathFloor,
+  Number,
+  NumberIsNaN,
+  Promise,
+  PromiseReject,
+  PromiseResolve,
+  PromisePrototypeThen,
+  Symbol
+} = require('../../ours/primordials')
+const kEmpty = Symbol('kEmpty')
+const kEof = Symbol('kEof')
+function compose(stream, options) {
+  if (options != null) {
+    validateObject(options, 'options')
+  }
+  if ((options === null || options === undefined ? undefined : options.signal) != null) {
+    validateAbortSignal(options.signal, 'options.signal')
+  }
+  if (isNodeStream(stream) && !isWritable(stream)) {
+    throw new ERR_INVALID_ARG_VALUE('stream', stream, 'must be writable')
+  }
+  const composedStream = staticCompose(this, stream)
+  if (options !== null && options !== undefined && options.signal) {
+    // Not validating as we already validated before
+    addAbortSignalNoValidate(options.signal, composedStream)
+  }
+  return composedStream
+}
+function map(fn, options) {
+  if (typeof fn !== 'function') {
+    throw new ERR_INVALID_ARG_TYPE('fn', ['Function', 'AsyncFunction'], fn)
+  }
+  if (options != null) {
+    validateObject(options, 'options')
+  }
+  if ((options === null || options === undefined ? undefined : options.signal) != null) {
+    validateAbortSignal(options.signal, 'options.signal')
+  }
+  let concurrency = 1
+  if ((options === null || options === undefined ? undefined : options.concurrency) != null) {
+    concurrency = MathFloor(options.concurrency)
+  }
+  let highWaterMark = concurrency - 1
+  if ((options === null || options === undefined ? undefined : options.highWaterMark) != null) {
+    highWaterMark = MathFloor(options.highWaterMark)
+  }
+  validateInteger(concurrency, 'options.concurrency', 1)
+  validateInteger(highWaterMark, 'options.highWaterMark', 0)
+  highWaterMark += concurrency
+  return async function* map() {
+    const signal = require('../../ours/util').AbortSignalAny(
+      [options === null || options === undefined ? undefined : options.signal].filter(Boolean)
+    )
+    const stream = this
+    const queue = []
+    const signalOpt = {
+      signal
+    }
+    let next
+    let resume
+    let done = false
+    let cnt = 0
+    function onCatch() {
+      done = true
+      afterItemProcessed()
+    }
+    function afterItemProcessed() {
+      cnt -= 1
+      maybeResume()
+    }
+    function maybeResume() {
+      if (resume && !done && cnt < concurrency && queue.length < highWaterMark) {
+        resume()
+        resume = null
+      }
+    }
+    async function pump() {
+      try {
+        for await (let val of stream) {
+          if (done) {
+            return
+          }
+          if (signal.aborted) {
+            throw new AbortError()
+          }
+          try {
+            val = fn(val, signalOpt)
+            if (val === kEmpty) {
+              continue
+            }
+            val = PromiseResolve(val)
+          } catch (err) {
+            val = PromiseReject(err)
+          }
+          cnt += 1
+          PromisePrototypeThen(val, afterItemProcessed, onCatch)
+          queue.push(val)
+          if (next) {
+            next()
+            next = null
+          }
+          if (!done && (queue.length >= highWaterMark || cnt >= concurrency)) {
+            await new Promise((resolve) => {
+              resume = resolve
+            })
+          }
+        }
+        queue.push(kEof)
+      } catch (err) {
+        const val = PromiseReject(err)
+        PromisePrototypeThen(val, afterItemProcessed, onCatch)
+        queue.push(val)
+      } finally {
+        done = true
+        if (next) {
+          next()
+          next = null
+        }
+      }
+    }
+    pump()
+    try {
+      while (true) {
+        while (queue.length > 0) {
+          const val = await queue[0]
+          if (val === kEof) {
+            return
+          }
+          if (signal.aborted) {
+            throw new AbortError()
+          }
+          if (val !== kEmpty) {
+            yield val
+          }
+          queue.shift()
+          maybeResume()
+        }
+        await new Promise((resolve) => {
+          next = resolve
+        })
+      }
+    } finally {
+      done = true
+      if (resume) {
+        resume()
+        resume = null
+      }
+    }
+  }.call(this)
+}
+function asIndexedPairs(options = undefined) {
+  if (options != null) {
+    validateObject(options, 'options')
+  }
+  if ((options === null || options === undefined ? undefined : options.signal) != null) {
+    validateAbortSignal(options.signal, 'options.signal')
+  }
+  return async function* asIndexedPairs() {
+    let index = 0
+    for await (const val of this) {
+      var _options$signal
+      if (
+        options !== null &&
+        options !== undefined &&
+        (_options$signal = options.signal) !== null &&
+        _options$signal !== undefined &&
+        _options$signal.aborted
+      ) {
+        throw new AbortError({
+          cause: options.signal.reason
+        })
+      }
+      yield [index++, val]
+    }
+  }.call(this)
+}
+async function some(fn, options = undefined) {
+  for await (const unused of filter.call(this, fn, options)) {
+    return true
+  }
+  return false
+}
+async function every(fn, options = undefined) {
+  if (typeof fn !== 'function') {
+    throw new ERR_INVALID_ARG_TYPE('fn', ['Function', 'AsyncFunction'], fn)
+  }
+  // https://en.wikipedia.org/wiki/De_Morgan%27s_laws
+  return !(await some.call(
+    this,
+    async (...args) => {
+      return !(await fn(...args))
+    },
+    options
+  ))
+}
+async function find(fn, options) {
+  for await (const result of filter.call(this, fn, options)) {
+    return result
+  }
+  return undefined
+}
+async function forEach(fn, options) {
+  if (typeof fn !== 'function') {
+    throw new ERR_INVALID_ARG_TYPE('fn', ['Function', 'AsyncFunction'], fn)
+  }
+  async function forEachFn(value, options) {
+    await fn(value, options)
+    return kEmpty
+  }
+  // eslint-disable-next-line no-unused-vars
+  for await (const unused of map.call(this, forEachFn, options));
+}
+function filter(fn, options) {
+  if (typeof fn !== 'function') {
+    throw new ERR_INVALID_ARG_TYPE('fn', ['Function', 'AsyncFunction'], fn)
+  }
+  async function filterFn(value, options) {
+    if (await fn(value, options)) {
+      return value
+    }
+    return kEmpty
+  }
+  return map.call(this, filterFn, options)
+}
+
+// Specific to provide better error to reduce since the argument is only
+// missing if the stream has no items in it - but the code is still appropriate
+class ReduceAwareErrMissingArgs extends ERR_MISSING_ARGS {
+  constructor() {
+    super('reduce')
+    this.message = 'Reduce of an empty stream requires an initial value'
+  }
+}
+async function reduce(reducer, initialValue, options) {
+  var _options$signal2
+  if (typeof reducer !== 'function') {
+    throw new ERR_INVALID_ARG_TYPE('reducer', ['Function', 'AsyncFunction'], reducer)
+  }
+  if (options != null) {
+    validateObject(options, 'options')
+  }
+  if ((options === null || options === undefined ? undefined : options.signal) != null) {
+    validateAbortSignal(options.signal, 'options.signal')
+  }
+  let hasInitialValue = arguments.length > 1
+  if (
+    options !== null &&
+    options !== undefined &&
+    (_options$signal2 = options.signal) !== null &&
+    _options$signal2 !== undefined &&
+    _options$signal2.aborted
+  ) {
+    const err = new AbortError(undefined, {
+      cause: options.signal.reason
+    })
+    this.once('error', () => {}) // The error is already propagated
+    await finished(this.destroy(err))
+    throw err
+  }
+  const ac = new AbortController()
+  const signal = ac.signal
+  if (options !== null && options !== undefined && options.signal) {
+    const opts = {
+      once: true,
+      [kWeakHandler]: this,
+      [kResistStopPropagation]: true
+    }
+    options.signal.addEventListener('abort', () => ac.abort(), opts)
+  }
+  let gotAnyItemFromStream = false
+  try {
+    for await (const value of this) {
+      var _options$signal3
+      gotAnyItemFromStream = true
+      if (
+        options !== null &&
+        options !== undefined &&
+        (_options$signal3 = options.signal) !== null &&
+        _options$signal3 !== undefined &&
+        _options$signal3.aborted
+      ) {
+        throw new AbortError()
+      }
+      if (!hasInitialValue) {
+        initialValue = value
+        hasInitialValue = true
+      } else {
+        initialValue = await reducer(initialValue, value, {
+          signal
+        })
+      }
+    }
+    if (!gotAnyItemFromStream && !hasInitialValue) {
+      throw new ReduceAwareErrMissingArgs()
+    }
+  } finally {
+    ac.abort()
+  }
+  return initialValue
+}
+async function toArray(options) {
+  if (options != null) {
+    validateObject(options, 'options')
+  }
+  if ((options === null || options === undefined ? undefined : options.signal) != null) {
+    validateAbortSignal(options.signal, 'options.signal')
+  }
+  const result = []
+  for await (const val of this) {
+    var _options$signal4
+    if (
+      options !== null &&
+      options !== undefined &&
+      (_options$signal4 = options.signal) !== null &&
+      _options$signal4 !== undefined &&
+      _options$signal4.aborted
+    ) {
+      throw new AbortError(undefined, {
+        cause: options.signal.reason
+      })
+    }
+    ArrayPrototypePush(result, val)
+  }
+  return result
+}
+function flatMap(fn, options) {
+  const values = map.call(this, fn, options)
+  return async function* flatMap() {
+    for await (const val of values) {
+      yield* val
+    }
+  }.call(this)
+}
+function toIntegerOrInfinity(number) {
+  // We coerce here to align with the spec
+  // https://github.com/tc39/proposal-iterator-helpers/issues/169
+  number = Number(number)
+  if (NumberIsNaN(number)) {
+    return 0
+  }
+  if (number < 0) {
+    throw new ERR_OUT_OF_RANGE('number', '>= 0', number)
+  }
+  return number
+}
+function drop(number, options = undefined) {
+  if (options != null) {
+    validateObject(options, 'options')
+  }
+  if ((options === null || options === undefined ? undefined : options.signal) != null) {
+    validateAbortSignal(options.signal, 'options.signal')
+  }
+  number = toIntegerOrInfinity(number)
+  return async function* drop() {
+    var _options$signal5
+    if (
+      options !== null &&
+      options !== undefined &&
+      (_options$signal5 = options.signal) !== null &&
+      _options$signal5 !== undefined &&
+      _options$signal5.aborted
+    ) {
+      throw new AbortError()
+    }
+    for await (const val of this) {
+      var _options$signal6
+      if (
+        options !== null &&
+        options !== undefined &&
+        (_options$signal6 = options.signal) !== null &&
+        _options$signal6 !== undefined &&
+        _options$signal6.aborted
+      ) {
+        throw new AbortError()
+      }
+      if (number-- <= 0) {
+        yield val
+      }
+    }
+  }.call(this)
+}
+function take(number, options = undefined) {
+  if (options != null) {
+    validateObject(options, 'options')
+  }
+  if ((options === null || options === undefined ? undefined : options.signal) != null) {
+    validateAbortSignal(options.signal, 'options.signal')
+  }
+  number = toIntegerOrInfinity(number)
+  return async function* take() {
+    var _options$signal7
+    if (
+      options !== null &&
+      options !== undefined &&
+      (_options$signal7 = options.signal) !== null &&
+      _options$signal7 !== undefined &&
+      _options$signal7.aborted
+    ) {
+      throw new AbortError()
+    }
+    for await (const val of this) {
+      var _options$signal8
+      if (
+        options !== null &&
+        options !== undefined &&
+        (_options$signal8 = options.signal) !== null &&
+        _options$signal8 !== undefined &&
+        _options$signal8.aborted
+      ) {
+        throw new AbortError()
+      }
+      if (number-- > 0) {
+        yield val
+      }
+
+      // Don't get another item from iterator in case we reached the end
+      if (number <= 0) {
+        return
+      }
+    }
+  }.call(this)
+}
+module.exports.streamReturningOperators = {
+  asIndexedPairs: deprecate(asIndexedPairs, 'readable.asIndexedPairs will be removed in a future version.'),
+  drop,
+  filter,
+  flatMap,
+  map,
+  take,
+  compose
+}
+module.exports.promiseReturningOperators = {
+  every,
+  forEach,
+  reduce,
+  toArray,
+  some,
+  find
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/passthrough.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/passthrough.js
new file mode 100644
index 0000000..ed4f486
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/passthrough.js
@@ -0,0 +1,39 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a passthrough stream.
+// basically just the most minimal sort of Transform stream.
+// Every written chunk gets output as-is.
+
+'use strict'
+
+const { ObjectSetPrototypeOf } = require('../../ours/primordials')
+module.exports = PassThrough
+const Transform = require('./transform')
+ObjectSetPrototypeOf(PassThrough.prototype, Transform.prototype)
+ObjectSetPrototypeOf(PassThrough, Transform)
+function PassThrough(options) {
+  if (!(this instanceof PassThrough)) return new PassThrough(options)
+  Transform.call(this, options)
+}
+PassThrough.prototype._transform = function (chunk, encoding, cb) {
+  cb(null, chunk)
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/pipeline.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/pipeline.js
new file mode 100644
index 0000000..a2bab88
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/pipeline.js
@@ -0,0 +1,471 @@
+/* replacement start */
+
+const process = require('process/')
+
+/* replacement end */
+// Ported from https://github.com/mafintosh/pump with
+// permission from the author, Mathias Buus (@mafintosh).
+
+;('use strict')
+const { ArrayIsArray, Promise, SymbolAsyncIterator, SymbolDispose } = require('../../ours/primordials')
+const eos = require('./end-of-stream')
+const { once } = require('../../ours/util')
+const destroyImpl = require('./destroy')
+const Duplex = require('./duplex')
+const {
+  aggregateTwoErrors,
+  codes: {
+    ERR_INVALID_ARG_TYPE,
+    ERR_INVALID_RETURN_VALUE,
+    ERR_MISSING_ARGS,
+    ERR_STREAM_DESTROYED,
+    ERR_STREAM_PREMATURE_CLOSE
+  },
+  AbortError
+} = require('../../ours/errors')
+const { validateFunction, validateAbortSignal } = require('../validators')
+const {
+  isIterable,
+  isReadable,
+  isReadableNodeStream,
+  isNodeStream,
+  isTransformStream,
+  isWebStream,
+  isReadableStream,
+  isReadableFinished
+} = require('./utils')
+const AbortController = globalThis.AbortController || require('abort-controller').AbortController
+let PassThrough
+let Readable
+let addAbortListener
+function destroyer(stream, reading, writing) {
+  let finished = false
+  stream.on('close', () => {
+    finished = true
+  })
+  const cleanup = eos(
+    stream,
+    {
+      readable: reading,
+      writable: writing
+    },
+    (err) => {
+      finished = !err
+    }
+  )
+  return {
+    destroy: (err) => {
+      if (finished) return
+      finished = true
+      destroyImpl.destroyer(stream, err || new ERR_STREAM_DESTROYED('pipe'))
+    },
+    cleanup
+  }
+}
+function popCallback(streams) {
+  // Streams should never be an empty array. It should always contain at least
+  // a single stream. Therefore optimize for the average case instead of
+  // checking for length === 0 as well.
+  validateFunction(streams[streams.length - 1], 'streams[stream.length - 1]')
+  return streams.pop()
+}
+function makeAsyncIterable(val) {
+  if (isIterable(val)) {
+    return val
+  } else if (isReadableNodeStream(val)) {
+    // Legacy streams are not Iterable.
+    return fromReadable(val)
+  }
+  throw new ERR_INVALID_ARG_TYPE('val', ['Readable', 'Iterable', 'AsyncIterable'], val)
+}
+async function* fromReadable(val) {
+  if (!Readable) {
+    Readable = require('./readable')
+  }
+  yield* Readable.prototype[SymbolAsyncIterator].call(val)
+}
+async function pumpToNode(iterable, writable, finish, { end }) {
+  let error
+  let onresolve = null
+  const resume = (err) => {
+    if (err) {
+      error = err
+    }
+    if (onresolve) {
+      const callback = onresolve
+      onresolve = null
+      callback()
+    }
+  }
+  const wait = () =>
+    new Promise((resolve, reject) => {
+      if (error) {
+        reject(error)
+      } else {
+        onresolve = () => {
+          if (error) {
+            reject(error)
+          } else {
+            resolve()
+          }
+        }
+      }
+    })
+  writable.on('drain', resume)
+  const cleanup = eos(
+    writable,
+    {
+      readable: false
+    },
+    resume
+  )
+  try {
+    if (writable.writableNeedDrain) {
+      await wait()
+    }
+    for await (const chunk of iterable) {
+      if (!writable.write(chunk)) {
+        await wait()
+      }
+    }
+    if (end) {
+      writable.end()
+      await wait()
+    }
+    finish()
+  } catch (err) {
+    finish(error !== err ? aggregateTwoErrors(error, err) : err)
+  } finally {
+    cleanup()
+    writable.off('drain', resume)
+  }
+}
+async function pumpToWeb(readable, writable, finish, { end }) {
+  if (isTransformStream(writable)) {
+    writable = writable.writable
+  }
+  // https://streams.spec.whatwg.org/#example-manual-write-with-backpressure
+  const writer = writable.getWriter()
+  try {
+    for await (const chunk of readable) {
+      await writer.ready
+      writer.write(chunk).catch(() => {})
+    }
+    await writer.ready
+    if (end) {
+      await writer.close()
+    }
+    finish()
+  } catch (err) {
+    try {
+      await writer.abort(err)
+      finish(err)
+    } catch (err) {
+      finish(err)
+    }
+  }
+}
+function pipeline(...streams) {
+  return pipelineImpl(streams, once(popCallback(streams)))
+}
+function pipelineImpl(streams, callback, opts) {
+  if (streams.length === 1 && ArrayIsArray(streams[0])) {
+    streams = streams[0]
+  }
+  if (streams.length < 2) {
+    throw new ERR_MISSING_ARGS('streams')
+  }
+  const ac = new AbortController()
+  const signal = ac.signal
+  const outerSignal = opts === null || opts === undefined ? undefined : opts.signal
+
+  // Need to cleanup event listeners if last stream is readable
+  // https://github.com/nodejs/node/issues/35452
+  const lastStreamCleanup = []
+  validateAbortSignal(outerSignal, 'options.signal')
+  function abort() {
+    finishImpl(new AbortError())
+  }
+  addAbortListener = addAbortListener || require('../../ours/util').addAbortListener
+  let disposable
+  if (outerSignal) {
+    disposable = addAbortListener(outerSignal, abort)
+  }
+  let error
+  let value
+  const destroys = []
+  let finishCount = 0
+  function finish(err) {
+    finishImpl(err, --finishCount === 0)
+  }
+  function finishImpl(err, final) {
+    var _disposable
+    if (err && (!error || error.code === 'ERR_STREAM_PREMATURE_CLOSE')) {
+      error = err
+    }
+    if (!error && !final) {
+      return
+    }
+    while (destroys.length) {
+      destroys.shift()(error)
+    }
+    ;(_disposable = disposable) === null || _disposable === undefined ? undefined : _disposable[SymbolDispose]()
+    ac.abort()
+    if (final) {
+      if (!error) {
+        lastStreamCleanup.forEach((fn) => fn())
+      }
+      process.nextTick(callback, error, value)
+    }
+  }
+  let ret
+  for (let i = 0; i < streams.length; i++) {
+    const stream = streams[i]
+    const reading = i < streams.length - 1
+    const writing = i > 0
+    const end = reading || (opts === null || opts === undefined ? undefined : opts.end) !== false
+    const isLastStream = i === streams.length - 1
+    if (isNodeStream(stream)) {
+      if (end) {
+        const { destroy, cleanup } = destroyer(stream, reading, writing)
+        destroys.push(destroy)
+        if (isReadable(stream) && isLastStream) {
+          lastStreamCleanup.push(cleanup)
+        }
+      }
+
+      // Catch stream errors that occur after pipe/pump has completed.
+      function onError(err) {
+        if (err && err.name !== 'AbortError' && err.code !== 'ERR_STREAM_PREMATURE_CLOSE') {
+          finish(err)
+        }
+      }
+      stream.on('error', onError)
+      if (isReadable(stream) && isLastStream) {
+        lastStreamCleanup.push(() => {
+          stream.removeListener('error', onError)
+        })
+      }
+    }
+    if (i === 0) {
+      if (typeof stream === 'function') {
+        ret = stream({
+          signal
+        })
+        if (!isIterable(ret)) {
+          throw new ERR_INVALID_RETURN_VALUE('Iterable, AsyncIterable or Stream', 'source', ret)
+        }
+      } else if (isIterable(stream) || isReadableNodeStream(stream) || isTransformStream(stream)) {
+        ret = stream
+      } else {
+        ret = Duplex.from(stream)
+      }
+    } else if (typeof stream === 'function') {
+      if (isTransformStream(ret)) {
+        var _ret
+        ret = makeAsyncIterable((_ret = ret) === null || _ret === undefined ? undefined : _ret.readable)
+      } else {
+        ret = makeAsyncIterable(ret)
+      }
+      ret = stream(ret, {
+        signal
+      })
+      if (reading) {
+        if (!isIterable(ret, true)) {
+          throw new ERR_INVALID_RETURN_VALUE('AsyncIterable', `transform[${i - 1}]`, ret)
+        }
+      } else {
+        var _ret2
+        if (!PassThrough) {
+          PassThrough = require('./passthrough')
+        }
+
+        // If the last argument to pipeline is not a stream
+        // we must create a proxy stream so that pipeline(...)
+        // always returns a stream which can be further
+        // composed through `.pipe(stream)`.
+
+        const pt = new PassThrough({
+          objectMode: true
+        })
+
+        // Handle Promises/A+ spec, `then` could be a getter that throws on
+        // second use.
+        const then = (_ret2 = ret) === null || _ret2 === undefined ? undefined : _ret2.then
+        if (typeof then === 'function') {
+          finishCount++
+          then.call(
+            ret,
+            (val) => {
+              value = val
+              if (val != null) {
+                pt.write(val)
+              }
+              if (end) {
+                pt.end()
+              }
+              process.nextTick(finish)
+            },
+            (err) => {
+              pt.destroy(err)
+              process.nextTick(finish, err)
+            }
+          )
+        } else if (isIterable(ret, true)) {
+          finishCount++
+          pumpToNode(ret, pt, finish, {
+            end
+          })
+        } else if (isReadableStream(ret) || isTransformStream(ret)) {
+          const toRead = ret.readable || ret
+          finishCount++
+          pumpToNode(toRead, pt, finish, {
+            end
+          })
+        } else {
+          throw new ERR_INVALID_RETURN_VALUE('AsyncIterable or Promise', 'destination', ret)
+        }
+        ret = pt
+        const { destroy, cleanup } = destroyer(ret, false, true)
+        destroys.push(destroy)
+        if (isLastStream) {
+          lastStreamCleanup.push(cleanup)
+        }
+      }
+    } else if (isNodeStream(stream)) {
+      if (isReadableNodeStream(ret)) {
+        finishCount += 2
+        const cleanup = pipe(ret, stream, finish, {
+          end
+        })
+        if (isReadable(stream) && isLastStream) {
+          lastStreamCleanup.push(cleanup)
+        }
+      } else if (isTransformStream(ret) || isReadableStream(ret)) {
+        const toRead = ret.readable || ret
+        finishCount++
+        pumpToNode(toRead, stream, finish, {
+          end
+        })
+      } else if (isIterable(ret)) {
+        finishCount++
+        pumpToNode(ret, stream, finish, {
+          end
+        })
+      } else {
+        throw new ERR_INVALID_ARG_TYPE(
+          'val',
+          ['Readable', 'Iterable', 'AsyncIterable', 'ReadableStream', 'TransformStream'],
+          ret
+        )
+      }
+      ret = stream
+    } else if (isWebStream(stream)) {
+      if (isReadableNodeStream(ret)) {
+        finishCount++
+        pumpToWeb(makeAsyncIterable(ret), stream, finish, {
+          end
+        })
+      } else if (isReadableStream(ret) || isIterable(ret)) {
+        finishCount++
+        pumpToWeb(ret, stream, finish, {
+          end
+        })
+      } else if (isTransformStream(ret)) {
+        finishCount++
+        pumpToWeb(ret.readable, stream, finish, {
+          end
+        })
+      } else {
+        throw new ERR_INVALID_ARG_TYPE(
+          'val',
+          ['Readable', 'Iterable', 'AsyncIterable', 'ReadableStream', 'TransformStream'],
+          ret
+        )
+      }
+      ret = stream
+    } else {
+      ret = Duplex.from(stream)
+    }
+  }
+  if (
+    (signal !== null && signal !== undefined && signal.aborted) ||
+    (outerSignal !== null && outerSignal !== undefined && outerSignal.aborted)
+  ) {
+    process.nextTick(abort)
+  }
+  return ret
+}
+function pipe(src, dst, finish, { end }) {
+  let ended = false
+  dst.on('close', () => {
+    if (!ended) {
+      // Finish if the destination closes before the source has completed.
+      finish(new ERR_STREAM_PREMATURE_CLOSE())
+    }
+  })
+  src.pipe(dst, {
+    end: false
+  }) // If end is true we already will have a listener to end dst.
+
+  if (end) {
+    // Compat. Before node v10.12.0 stdio used to throw an error so
+    // pipe() did/does not end() stdio destinations.
+    // Now they allow it but "secretly" don't close the underlying fd.
+
+    function endFn() {
+      ended = true
+      dst.end()
+    }
+    if (isReadableFinished(src)) {
+      // End the destination if the source has already ended.
+      process.nextTick(endFn)
+    } else {
+      src.once('end', endFn)
+    }
+  } else {
+    finish()
+  }
+  eos(
+    src,
+    {
+      readable: true,
+      writable: false
+    },
+    (err) => {
+      const rState = src._readableState
+      if (
+        err &&
+        err.code === 'ERR_STREAM_PREMATURE_CLOSE' &&
+        rState &&
+        rState.ended &&
+        !rState.errored &&
+        !rState.errorEmitted
+      ) {
+        // Some readable streams will emit 'close' before 'end'. However, since
+        // this is on the readable side 'end' should still be emitted if the
+        // stream has been ended and no error emitted. This should be allowed in
+        // favor of backwards compatibility. Since the stream is piped to a
+        // destination this should not result in any observable difference.
+        // We don't need to check if this is a writable premature close since
+        // eos will only fail with premature close on the reading side for
+        // duplex streams.
+        src.once('end', finish).once('error', finish)
+      } else {
+        finish(err)
+      }
+    }
+  )
+  return eos(
+    dst,
+    {
+      readable: false,
+      writable: true
+    },
+    finish
+  )
+}
+module.exports = {
+  pipelineImpl,
+  pipeline
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/readable.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/readable.js
new file mode 100644
index 0000000..90c7316
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/readable.js
@@ -0,0 +1,1290 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict'
+
+/* replacement start */
+
+const process = require('process/')
+
+/* replacement end */
+
+const {
+  ArrayPrototypeIndexOf,
+  NumberIsInteger,
+  NumberIsNaN,
+  NumberParseInt,
+  ObjectDefineProperties,
+  ObjectKeys,
+  ObjectSetPrototypeOf,
+  Promise,
+  SafeSet,
+  SymbolAsyncDispose,
+  SymbolAsyncIterator,
+  Symbol
+} = require('../../ours/primordials')
+module.exports = Readable
+Readable.ReadableState = ReadableState
+const { EventEmitter: EE } = require('events')
+const { Stream, prependListener } = require('./legacy')
+const { Buffer } = require('buffer')
+const { addAbortSignal } = require('./add-abort-signal')
+const eos = require('./end-of-stream')
+let debug = require('../../ours/util').debuglog('stream', (fn) => {
+  debug = fn
+})
+const BufferList = require('./buffer_list')
+const destroyImpl = require('./destroy')
+const { getHighWaterMark, getDefaultHighWaterMark } = require('./state')
+const {
+  aggregateTwoErrors,
+  codes: {
+    ERR_INVALID_ARG_TYPE,
+    ERR_METHOD_NOT_IMPLEMENTED,
+    ERR_OUT_OF_RANGE,
+    ERR_STREAM_PUSH_AFTER_EOF,
+    ERR_STREAM_UNSHIFT_AFTER_END_EVENT
+  },
+  AbortError
+} = require('../../ours/errors')
+const { validateObject } = require('../validators')
+const kPaused = Symbol('kPaused')
+const { StringDecoder } = require('string_decoder/')
+const from = require('./from')
+ObjectSetPrototypeOf(Readable.prototype, Stream.prototype)
+ObjectSetPrototypeOf(Readable, Stream)
+const nop = () => {}
+const { errorOrDestroy } = destroyImpl
+const kObjectMode = 1 << 0
+const kEnded = 1 << 1
+const kEndEmitted = 1 << 2
+const kReading = 1 << 3
+const kConstructed = 1 << 4
+const kSync = 1 << 5
+const kNeedReadable = 1 << 6
+const kEmittedReadable = 1 << 7
+const kReadableListening = 1 << 8
+const kResumeScheduled = 1 << 9
+const kErrorEmitted = 1 << 10
+const kEmitClose = 1 << 11
+const kAutoDestroy = 1 << 12
+const kDestroyed = 1 << 13
+const kClosed = 1 << 14
+const kCloseEmitted = 1 << 15
+const kMultiAwaitDrain = 1 << 16
+const kReadingMore = 1 << 17
+const kDataEmitted = 1 << 18
+
+// TODO(benjamingr) it is likely slower to do it this way than with free functions
+function makeBitMapDescriptor(bit) {
+  return {
+    enumerable: false,
+    get() {
+      return (this.state & bit) !== 0
+    },
+    set(value) {
+      if (value) this.state |= bit
+      else this.state &= ~bit
+    }
+  }
+}
+ObjectDefineProperties(ReadableState.prototype, {
+  objectMode: makeBitMapDescriptor(kObjectMode),
+  ended: makeBitMapDescriptor(kEnded),
+  endEmitted: makeBitMapDescriptor(kEndEmitted),
+  reading: makeBitMapDescriptor(kReading),
+  // Stream is still being constructed and cannot be
+  // destroyed until construction finished or failed.
+  // Async construction is opt in, therefore we start as
+  // constructed.
+  constructed: makeBitMapDescriptor(kConstructed),
+  // A flag to be able to tell if the event 'readable'/'data' is emitted
+  // immediately, or on a later tick.  We set this to true at first, because
+  // any actions that shouldn't happen until "later" should generally also
+  // not happen before the first read call.
+  sync: makeBitMapDescriptor(kSync),
+  // Whenever we return null, then we set a flag to say
+  // that we're awaiting a 'readable' event emission.
+  needReadable: makeBitMapDescriptor(kNeedReadable),
+  emittedReadable: makeBitMapDescriptor(kEmittedReadable),
+  readableListening: makeBitMapDescriptor(kReadableListening),
+  resumeScheduled: makeBitMapDescriptor(kResumeScheduled),
+  // True if the error was already emitted and should not be thrown again.
+  errorEmitted: makeBitMapDescriptor(kErrorEmitted),
+  emitClose: makeBitMapDescriptor(kEmitClose),
+  autoDestroy: makeBitMapDescriptor(kAutoDestroy),
+  // Has it been destroyed.
+  destroyed: makeBitMapDescriptor(kDestroyed),
+  // Indicates whether the stream has finished destroying.
+  closed: makeBitMapDescriptor(kClosed),
+  // True if close has been emitted or would have been emitted
+  // depending on emitClose.
+  closeEmitted: makeBitMapDescriptor(kCloseEmitted),
+  multiAwaitDrain: makeBitMapDescriptor(kMultiAwaitDrain),
+  // If true, a maybeReadMore has been scheduled.
+  readingMore: makeBitMapDescriptor(kReadingMore),
+  dataEmitted: makeBitMapDescriptor(kDataEmitted)
+})
+function ReadableState(options, stream, isDuplex) {
+  // Duplex streams are both readable and writable, but share
+  // the same options object.
+  // However, some cases require setting options to different
+  // values for the readable and the writable sides of the duplex stream.
+  // These options can be provided separately as readableXXX and writableXXX.
+  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof require('./duplex')
+
+  // Bit map field to store ReadableState more effciently with 1 bit per field
+  // instead of a V8 slot per field.
+  this.state = kEmitClose | kAutoDestroy | kConstructed | kSync
+  // Object stream flag. Used to make read(n) ignore n and to
+  // make all the buffer merging and length checks go away.
+  if (options && options.objectMode) this.state |= kObjectMode
+  if (isDuplex && options && options.readableObjectMode) this.state |= kObjectMode
+
+  // The point at which it stops calling _read() to fill the buffer
+  // Note: 0 is a valid value, means "don't call _read preemptively ever"
+  this.highWaterMark = options
+    ? getHighWaterMark(this, options, 'readableHighWaterMark', isDuplex)
+    : getDefaultHighWaterMark(false)
+
+  // A linked list is used to store data chunks instead of an array because the
+  // linked list can remove elements from the beginning faster than
+  // array.shift().
+  this.buffer = new BufferList()
+  this.length = 0
+  this.pipes = []
+  this.flowing = null
+  this[kPaused] = null
+
+  // Should close be emitted on destroy. Defaults to true.
+  if (options && options.emitClose === false) this.state &= ~kEmitClose
+
+  // Should .destroy() be called after 'end' (and potentially 'finish').
+  if (options && options.autoDestroy === false) this.state &= ~kAutoDestroy
+
+  // Indicates whether the stream has errored. When true no further
+  // _read calls, 'data' or 'readable' events should occur. This is needed
+  // since when autoDestroy is disabled we need a way to tell whether the
+  // stream has failed.
+  this.errored = null
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = (options && options.defaultEncoding) || 'utf8'
+
+  // Ref the piped dest which we need a drain event on it
+  // type: null | Writable | Set<Writable>.
+  this.awaitDrainWriters = null
+  this.decoder = null
+  this.encoding = null
+  if (options && options.encoding) {
+    this.decoder = new StringDecoder(options.encoding)
+    this.encoding = options.encoding
+  }
+}
+function Readable(options) {
+  if (!(this instanceof Readable)) return new Readable(options)
+
+  // Checking for a Stream.Duplex instance is faster here instead of inside
+  // the ReadableState constructor, at least with V8 6.5.
+  const isDuplex = this instanceof require('./duplex')
+  this._readableState = new ReadableState(options, this, isDuplex)
+  if (options) {
+    if (typeof options.read === 'function') this._read = options.read
+    if (typeof options.destroy === 'function') this._destroy = options.destroy
+    if (typeof options.construct === 'function') this._construct = options.construct
+    if (options.signal && !isDuplex) addAbortSignal(options.signal, this)
+  }
+  Stream.call(this, options)
+  destroyImpl.construct(this, () => {
+    if (this._readableState.needReadable) {
+      maybeReadMore(this, this._readableState)
+    }
+  })
+}
+Readable.prototype.destroy = destroyImpl.destroy
+Readable.prototype._undestroy = destroyImpl.undestroy
+Readable.prototype._destroy = function (err, cb) {
+  cb(err)
+}
+Readable.prototype[EE.captureRejectionSymbol] = function (err) {
+  this.destroy(err)
+}
+Readable.prototype[SymbolAsyncDispose] = function () {
+  let error
+  if (!this.destroyed) {
+    error = this.readableEnded ? null : new AbortError()
+    this.destroy(error)
+  }
+  return new Promise((resolve, reject) => eos(this, (err) => (err && err !== error ? reject(err) : resolve(null))))
+}
+
+// Manually shove something into the read() buffer.
+// This returns true if the highWaterMark has not been hit yet,
+// similar to how Writable.write() returns true if you should
+// write() some more.
+Readable.prototype.push = function (chunk, encoding) {
+  return readableAddChunk(this, chunk, encoding, false)
+}
+
+// Unshift should *always* be something directly out of read().
+Readable.prototype.unshift = function (chunk, encoding) {
+  return readableAddChunk(this, chunk, encoding, true)
+}
+function readableAddChunk(stream, chunk, encoding, addToFront) {
+  debug('readableAddChunk', chunk)
+  const state = stream._readableState
+  let err
+  if ((state.state & kObjectMode) === 0) {
+    if (typeof chunk === 'string') {
+      encoding = encoding || state.defaultEncoding
+      if (state.encoding !== encoding) {
+        if (addToFront && state.encoding) {
+          // When unshifting, if state.encoding is set, we have to save
+          // the string in the BufferList with the state encoding.
+          chunk = Buffer.from(chunk, encoding).toString(state.encoding)
+        } else {
+          chunk = Buffer.from(chunk, encoding)
+          encoding = ''
+        }
+      }
+    } else if (chunk instanceof Buffer) {
+      encoding = ''
+    } else if (Stream._isUint8Array(chunk)) {
+      chunk = Stream._uint8ArrayToBuffer(chunk)
+      encoding = ''
+    } else if (chunk != null) {
+      err = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer', 'Uint8Array'], chunk)
+    }
+  }
+  if (err) {
+    errorOrDestroy(stream, err)
+  } else if (chunk === null) {
+    state.state &= ~kReading
+    onEofChunk(stream, state)
+  } else if ((state.state & kObjectMode) !== 0 || (chunk && chunk.length > 0)) {
+    if (addToFront) {
+      if ((state.state & kEndEmitted) !== 0) errorOrDestroy(stream, new ERR_STREAM_UNSHIFT_AFTER_END_EVENT())
+      else if (state.destroyed || state.errored) return false
+      else addChunk(stream, state, chunk, true)
+    } else if (state.ended) {
+      errorOrDestroy(stream, new ERR_STREAM_PUSH_AFTER_EOF())
+    } else if (state.destroyed || state.errored) {
+      return false
+    } else {
+      state.state &= ~kReading
+      if (state.decoder && !encoding) {
+        chunk = state.decoder.write(chunk)
+        if (state.objectMode || chunk.length !== 0) addChunk(stream, state, chunk, false)
+        else maybeReadMore(stream, state)
+      } else {
+        addChunk(stream, state, chunk, false)
+      }
+    }
+  } else if (!addToFront) {
+    state.state &= ~kReading
+    maybeReadMore(stream, state)
+  }
+
+  // We can push more data if we are below the highWaterMark.
+  // Also, if we have no data yet, we can stand some more bytes.
+  // This is to work around cases where hwm=0, such as the repl.
+  return !state.ended && (state.length < state.highWaterMark || state.length === 0)
+}
+function addChunk(stream, state, chunk, addToFront) {
+  if (state.flowing && state.length === 0 && !state.sync && stream.listenerCount('data') > 0) {
+    // Use the guard to avoid creating `Set()` repeatedly
+    // when we have multiple pipes.
+    if ((state.state & kMultiAwaitDrain) !== 0) {
+      state.awaitDrainWriters.clear()
+    } else {
+      state.awaitDrainWriters = null
+    }
+    state.dataEmitted = true
+    stream.emit('data', chunk)
+  } else {
+    // Update the buffer info.
+    state.length += state.objectMode ? 1 : chunk.length
+    if (addToFront) state.buffer.unshift(chunk)
+    else state.buffer.push(chunk)
+    if ((state.state & kNeedReadable) !== 0) emitReadable(stream)
+  }
+  maybeReadMore(stream, state)
+}
+Readable.prototype.isPaused = function () {
+  const state = this._readableState
+  return state[kPaused] === true || state.flowing === false
+}
+
+// Backwards compatibility.
+Readable.prototype.setEncoding = function (enc) {
+  const decoder = new StringDecoder(enc)
+  this._readableState.decoder = decoder
+  // If setEncoding(null), decoder.encoding equals utf8.
+  this._readableState.encoding = this._readableState.decoder.encoding
+  const buffer = this._readableState.buffer
+  // Iterate over current buffer to convert already stored Buffers:
+  let content = ''
+  for (const data of buffer) {
+    content += decoder.write(data)
+  }
+  buffer.clear()
+  if (content !== '') buffer.push(content)
+  this._readableState.length = content.length
+  return this
+}
+
+// Don't raise the hwm > 1GB.
+const MAX_HWM = 0x40000000
+function computeNewHighWaterMark(n) {
+  if (n > MAX_HWM) {
+    throw new ERR_OUT_OF_RANGE('size', '<= 1GiB', n)
+  } else {
+    // Get the next highest power of 2 to prevent increasing hwm excessively in
+    // tiny amounts.
+    n--
+    n |= n >>> 1
+    n |= n >>> 2
+    n |= n >>> 4
+    n |= n >>> 8
+    n |= n >>> 16
+    n++
+  }
+  return n
+}
+
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function howMuchToRead(n, state) {
+  if (n <= 0 || (state.length === 0 && state.ended)) return 0
+  if ((state.state & kObjectMode) !== 0) return 1
+  if (NumberIsNaN(n)) {
+    // Only flow one buffer at a time.
+    if (state.flowing && state.length) return state.buffer.first().length
+    return state.length
+  }
+  if (n <= state.length) return n
+  return state.ended ? state.length : 0
+}
+
+// You can override either this method, or the async _read(n) below.
+Readable.prototype.read = function (n) {
+  debug('read', n)
+  // Same as parseInt(undefined, 10), however V8 7.3 performance regressed
+  // in this scenario, so we are doing it manually.
+  if (n === undefined) {
+    n = NaN
+  } else if (!NumberIsInteger(n)) {
+    n = NumberParseInt(n, 10)
+  }
+  const state = this._readableState
+  const nOrig = n
+
+  // If we're asking for more than the current hwm, then raise the hwm.
+  if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n)
+  if (n !== 0) state.state &= ~kEmittedReadable
+
+  // If we're doing read(0) to trigger a readable event, but we
+  // already have a bunch of data in the buffer, then just trigger
+  // the 'readable' event and move on.
+  if (
+    n === 0 &&
+    state.needReadable &&
+    ((state.highWaterMark !== 0 ? state.length >= state.highWaterMark : state.length > 0) || state.ended)
+  ) {
+    debug('read: emitReadable', state.length, state.ended)
+    if (state.length === 0 && state.ended) endReadable(this)
+    else emitReadable(this)
+    return null
+  }
+  n = howMuchToRead(n, state)
+
+  // If we've ended, and we're now clear, then finish it up.
+  if (n === 0 && state.ended) {
+    if (state.length === 0) endReadable(this)
+    return null
+  }
+
+  // All the actual chunk generation logic needs to be
+  // *below* the call to _read.  The reason is that in certain
+  // synthetic stream cases, such as passthrough streams, _read
+  // may be a completely synchronous operation which may change
+  // the state of the read buffer, providing enough data when
+  // before there was *not* enough.
+  //
+  // So, the steps are:
+  // 1. Figure out what the state of things will be after we do
+  // a read from the buffer.
+  //
+  // 2. If that resulting state will trigger a _read, then call _read.
+  // Note that this may be asynchronous, or synchronous.  Yes, it is
+  // deeply ugly to write APIs this way, but that still doesn't mean
+  // that the Readable class should behave improperly, as streams are
+  // designed to be sync/async agnostic.
+  // Take note if the _read call is sync or async (ie, if the read call
+  // has returned yet), so that we know whether or not it's safe to emit
+  // 'readable' etc.
+  //
+  // 3. Actually pull the requested chunks out of the buffer and return.
+
+  // if we need a readable event, then we need to do some reading.
+  let doRead = (state.state & kNeedReadable) !== 0
+  debug('need readable', doRead)
+
+  // If we currently have less than the highWaterMark, then also read some.
+  if (state.length === 0 || state.length - n < state.highWaterMark) {
+    doRead = true
+    debug('length less than watermark', doRead)
+  }
+
+  // However, if we've ended, then there's no point, if we're already
+  // reading, then it's unnecessary, if we're constructing we have to wait,
+  // and if we're destroyed or errored, then it's not allowed,
+  if (state.ended || state.reading || state.destroyed || state.errored || !state.constructed) {
+    doRead = false
+    debug('reading, ended or constructing', doRead)
+  } else if (doRead) {
+    debug('do read')
+    state.state |= kReading | kSync
+    // If the length is currently zero, then we *need* a readable event.
+    if (state.length === 0) state.state |= kNeedReadable
+
+    // Call internal read method
+    try {
+      this._read(state.highWaterMark)
+    } catch (err) {
+      errorOrDestroy(this, err)
+    }
+    state.state &= ~kSync
+
+    // If _read pushed data synchronously, then `reading` will be false,
+    // and we need to re-evaluate how much data we can return to the user.
+    if (!state.reading) n = howMuchToRead(nOrig, state)
+  }
+  let ret
+  if (n > 0) ret = fromList(n, state)
+  else ret = null
+  if (ret === null) {
+    state.needReadable = state.length <= state.highWaterMark
+    n = 0
+  } else {
+    state.length -= n
+    if (state.multiAwaitDrain) {
+      state.awaitDrainWriters.clear()
+    } else {
+      state.awaitDrainWriters = null
+    }
+  }
+  if (state.length === 0) {
+    // If we have nothing in the buffer, then we want to know
+    // as soon as we *do* get something into the buffer.
+    if (!state.ended) state.needReadable = true
+
+    // If we tried to read() past the EOF, then emit end on the next tick.
+    if (nOrig !== n && state.ended) endReadable(this)
+  }
+  if (ret !== null && !state.errorEmitted && !state.closeEmitted) {
+    state.dataEmitted = true
+    this.emit('data', ret)
+  }
+  return ret
+}
+function onEofChunk(stream, state) {
+  debug('onEofChunk')
+  if (state.ended) return
+  if (state.decoder) {
+    const chunk = state.decoder.end()
+    if (chunk && chunk.length) {
+      state.buffer.push(chunk)
+      state.length += state.objectMode ? 1 : chunk.length
+    }
+  }
+  state.ended = true
+  if (state.sync) {
+    // If we are sync, wait until next tick to emit the data.
+    // Otherwise we risk emitting data in the flow()
+    // the readable code triggers during a read() call.
+    emitReadable(stream)
+  } else {
+    // Emit 'readable' now to make sure it gets picked up.
+    state.needReadable = false
+    state.emittedReadable = true
+    // We have to emit readable now that we are EOF. Modules
+    // in the ecosystem (e.g. dicer) rely on this event being sync.
+    emitReadable_(stream)
+  }
+}
+
+// Don't emit readable right away in sync mode, because this can trigger
+// another read() call => stack overflow.  This way, it might trigger
+// a nextTick recursion warning, but that's not so bad.
+function emitReadable(stream) {
+  const state = stream._readableState
+  debug('emitReadable', state.needReadable, state.emittedReadable)
+  state.needReadable = false
+  if (!state.emittedReadable) {
+    debug('emitReadable', state.flowing)
+    state.emittedReadable = true
+    process.nextTick(emitReadable_, stream)
+  }
+}
+function emitReadable_(stream) {
+  const state = stream._readableState
+  debug('emitReadable_', state.destroyed, state.length, state.ended)
+  if (!state.destroyed && !state.errored && (state.length || state.ended)) {
+    stream.emit('readable')
+    state.emittedReadable = false
+  }
+
+  // The stream needs another readable event if:
+  // 1. It is not flowing, as the flow mechanism will take
+  //    care of it.
+  // 2. It is not ended.
+  // 3. It is below the highWaterMark, so we can schedule
+  //    another readable later.
+  state.needReadable = !state.flowing && !state.ended && state.length <= state.highWaterMark
+  flow(stream)
+}
+
+// At this point, the user has presumably seen the 'readable' event,
+// and called read() to consume some data.  that may have triggered
+// in turn another _read(n) call, in which case reading = true if
+// it's in progress.
+// However, if we're not ended, or reading, and the length < hwm,
+// then go ahead and try to read some more preemptively.
+function maybeReadMore(stream, state) {
+  if (!state.readingMore && state.constructed) {
+    state.readingMore = true
+    process.nextTick(maybeReadMore_, stream, state)
+  }
+}
+function maybeReadMore_(stream, state) {
+  // Attempt to read more data if we should.
+  //
+  // The conditions for reading more data are (one of):
+  // - Not enough data buffered (state.length < state.highWaterMark). The loop
+  //   is responsible for filling the buffer with enough data if such data
+  //   is available. If highWaterMark is 0 and we are not in the flowing mode
+  //   we should _not_ attempt to buffer any extra data. We'll get more data
+  //   when the stream consumer calls read() instead.
+  // - No data in the buffer, and the stream is in flowing mode. In this mode
+  //   the loop below is responsible for ensuring read() is called. Failing to
+  //   call read here would abort the flow and there's no other mechanism for
+  //   continuing the flow if the stream consumer has just subscribed to the
+  //   'data' event.
+  //
+  // In addition to the above conditions to keep reading data, the following
+  // conditions prevent the data from being read:
+  // - The stream has ended (state.ended).
+  // - There is already a pending 'read' operation (state.reading). This is a
+  //   case where the stream has called the implementation defined _read()
+  //   method, but they are processing the call asynchronously and have _not_
+  //   called push() with new data. In this case we skip performing more
+  //   read()s. The execution ends in this method again after the _read() ends
+  //   up calling push() with more data.
+  while (
+    !state.reading &&
+    !state.ended &&
+    (state.length < state.highWaterMark || (state.flowing && state.length === 0))
+  ) {
+    const len = state.length
+    debug('maybeReadMore read 0')
+    stream.read(0)
+    if (len === state.length)
+      // Didn't get any data, stop spinning.
+      break
+  }
+  state.readingMore = false
+}
+
+// Abstract method.  to be overridden in specific implementation classes.
+// call cb(er, data) where data is <= n in length.
+// for virtual (non-string, non-buffer) streams, "length" is somewhat
+// arbitrary, and perhaps not very meaningful.
+Readable.prototype._read = function (n) {
+  throw new ERR_METHOD_NOT_IMPLEMENTED('_read()')
+}
+Readable.prototype.pipe = function (dest, pipeOpts) {
+  const src = this
+  const state = this._readableState
+  if (state.pipes.length === 1) {
+    if (!state.multiAwaitDrain) {
+      state.multiAwaitDrain = true
+      state.awaitDrainWriters = new SafeSet(state.awaitDrainWriters ? [state.awaitDrainWriters] : [])
+    }
+  }
+  state.pipes.push(dest)
+  debug('pipe count=%d opts=%j', state.pipes.length, pipeOpts)
+  const doEnd = (!pipeOpts || pipeOpts.end !== false) && dest !== process.stdout && dest !== process.stderr
+  const endFn = doEnd ? onend : unpipe
+  if (state.endEmitted) process.nextTick(endFn)
+  else src.once('end', endFn)
+  dest.on('unpipe', onunpipe)
+  function onunpipe(readable, unpipeInfo) {
+    debug('onunpipe')
+    if (readable === src) {
+      if (unpipeInfo && unpipeInfo.hasUnpiped === false) {
+        unpipeInfo.hasUnpiped = true
+        cleanup()
+      }
+    }
+  }
+  function onend() {
+    debug('onend')
+    dest.end()
+  }
+  let ondrain
+  let cleanedUp = false
+  function cleanup() {
+    debug('cleanup')
+    // Cleanup event handlers once the pipe is broken.
+    dest.removeListener('close', onclose)
+    dest.removeListener('finish', onfinish)
+    if (ondrain) {
+      dest.removeListener('drain', ondrain)
+    }
+    dest.removeListener('error', onerror)
+    dest.removeListener('unpipe', onunpipe)
+    src.removeListener('end', onend)
+    src.removeListener('end', unpipe)
+    src.removeListener('data', ondata)
+    cleanedUp = true
+
+    // If the reader is waiting for a drain event from this
+    // specific writer, then it would cause it to never start
+    // flowing again.
+    // So, if this is awaiting a drain, then we just call it now.
+    // If we don't know, then assume that we are waiting for one.
+    if (ondrain && state.awaitDrainWriters && (!dest._writableState || dest._writableState.needDrain)) ondrain()
+  }
+  function pause() {
+    // If the user unpiped during `dest.write()`, it is possible
+    // to get stuck in a permanently paused state if that write
+    // also returned false.
+    // => Check whether `dest` is still a piping destination.
+    if (!cleanedUp) {
+      if (state.pipes.length === 1 && state.pipes[0] === dest) {
+        debug('false write response, pause', 0)
+        state.awaitDrainWriters = dest
+        state.multiAwaitDrain = false
+      } else if (state.pipes.length > 1 && state.pipes.includes(dest)) {
+        debug('false write response, pause', state.awaitDrainWriters.size)
+        state.awaitDrainWriters.add(dest)
+      }
+      src.pause()
+    }
+    if (!ondrain) {
+      // When the dest drains, it reduces the awaitDrain counter
+      // on the source.  This would be more elegant with a .once()
+      // handler in flow(), but adding and removing repeatedly is
+      // too slow.
+      ondrain = pipeOnDrain(src, dest)
+      dest.on('drain', ondrain)
+    }
+  }
+  src.on('data', ondata)
+  function ondata(chunk) {
+    debug('ondata')
+    const ret = dest.write(chunk)
+    debug('dest.write', ret)
+    if (ret === false) {
+      pause()
+    }
+  }
+
+  // If the dest has an error, then stop piping into it.
+  // However, don't suppress the throwing behavior for this.
+  function onerror(er) {
+    debug('onerror', er)
+    unpipe()
+    dest.removeListener('error', onerror)
+    if (dest.listenerCount('error') === 0) {
+      const s = dest._writableState || dest._readableState
+      if (s && !s.errorEmitted) {
+        // User incorrectly emitted 'error' directly on the stream.
+        errorOrDestroy(dest, er)
+      } else {
+        dest.emit('error', er)
+      }
+    }
+  }
+
+  // Make sure our error handler is attached before userland ones.
+  prependListener(dest, 'error', onerror)
+
+  // Both close and finish should trigger unpipe, but only once.
+  function onclose() {
+    dest.removeListener('finish', onfinish)
+    unpipe()
+  }
+  dest.once('close', onclose)
+  function onfinish() {
+    debug('onfinish')
+    dest.removeListener('close', onclose)
+    unpipe()
+  }
+  dest.once('finish', onfinish)
+  function unpipe() {
+    debug('unpipe')
+    src.unpipe(dest)
+  }
+
+  // Tell the dest that it's being piped to.
+  dest.emit('pipe', src)
+
+  // Start the flow if it hasn't been started already.
+
+  if (dest.writableNeedDrain === true) {
+    pause()
+  } else if (!state.flowing) {
+    debug('pipe resume')
+    src.resume()
+  }
+  return dest
+}
+function pipeOnDrain(src, dest) {
+  return function pipeOnDrainFunctionResult() {
+    const state = src._readableState
+
+    // `ondrain` will call directly,
+    // `this` maybe not a reference to dest,
+    // so we use the real dest here.
+    if (state.awaitDrainWriters === dest) {
+      debug('pipeOnDrain', 1)
+      state.awaitDrainWriters = null
+    } else if (state.multiAwaitDrain) {
+      debug('pipeOnDrain', state.awaitDrainWriters.size)
+      state.awaitDrainWriters.delete(dest)
+    }
+    if ((!state.awaitDrainWriters || state.awaitDrainWriters.size === 0) && src.listenerCount('data')) {
+      src.resume()
+    }
+  }
+}
+Readable.prototype.unpipe = function (dest) {
+  const state = this._readableState
+  const unpipeInfo = {
+    hasUnpiped: false
+  }
+
+  // If we're not piping anywhere, then do nothing.
+  if (state.pipes.length === 0) return this
+  if (!dest) {
+    // remove all.
+    const dests = state.pipes
+    state.pipes = []
+    this.pause()
+    for (let i = 0; i < dests.length; i++)
+      dests[i].emit('unpipe', this, {
+        hasUnpiped: false
+      })
+    return this
+  }
+
+  // Try to find the right one.
+  const index = ArrayPrototypeIndexOf(state.pipes, dest)
+  if (index === -1) return this
+  state.pipes.splice(index, 1)
+  if (state.pipes.length === 0) this.pause()
+  dest.emit('unpipe', this, unpipeInfo)
+  return this
+}
+
+// Set up data events if they are asked for
+// Ensure readable listeners eventually get something.
+Readable.prototype.on = function (ev, fn) {
+  const res = Stream.prototype.on.call(this, ev, fn)
+  const state = this._readableState
+  if (ev === 'data') {
+    // Update readableListening so that resume() may be a no-op
+    // a few lines down. This is needed to support once('readable').
+    state.readableListening = this.listenerCount('readable') > 0
+
+    // Try start flowing on next tick if stream isn't explicitly paused.
+    if (state.flowing !== false) this.resume()
+  } else if (ev === 'readable') {
+    if (!state.endEmitted && !state.readableListening) {
+      state.readableListening = state.needReadable = true
+      state.flowing = false
+      state.emittedReadable = false
+      debug('on readable', state.length, state.reading)
+      if (state.length) {
+        emitReadable(this)
+      } else if (!state.reading) {
+        process.nextTick(nReadingNextTick, this)
+      }
+    }
+  }
+  return res
+}
+Readable.prototype.addListener = Readable.prototype.on
+Readable.prototype.removeListener = function (ev, fn) {
+  const res = Stream.prototype.removeListener.call(this, ev, fn)
+  if (ev === 'readable') {
+    // We need to check if there is someone still listening to
+    // readable and reset the state. However this needs to happen
+    // after readable has been emitted but before I/O (nextTick) to
+    // support once('readable', fn) cycles. This means that calling
+    // resume within the same tick will have no
+    // effect.
+    process.nextTick(updateReadableListening, this)
+  }
+  return res
+}
+Readable.prototype.off = Readable.prototype.removeListener
+Readable.prototype.removeAllListeners = function (ev) {
+  const res = Stream.prototype.removeAllListeners.apply(this, arguments)
+  if (ev === 'readable' || ev === undefined) {
+    // We need to check if there is someone still listening to
+    // readable and reset the state. However this needs to happen
+    // after readable has been emitted but before I/O (nextTick) to
+    // support once('readable', fn) cycles. This means that calling
+    // resume within the same tick will have no
+    // effect.
+    process.nextTick(updateReadableListening, this)
+  }
+  return res
+}
+function updateReadableListening(self) {
+  const state = self._readableState
+  state.readableListening = self.listenerCount('readable') > 0
+  if (state.resumeScheduled && state[kPaused] === false) {
+    // Flowing needs to be set to true now, otherwise
+    // the upcoming resume will not flow.
+    state.flowing = true
+
+    // Crude way to check if we should resume.
+  } else if (self.listenerCount('data') > 0) {
+    self.resume()
+  } else if (!state.readableListening) {
+    state.flowing = null
+  }
+}
+function nReadingNextTick(self) {
+  debug('readable nexttick read 0')
+  self.read(0)
+}
+
+// pause() and resume() are remnants of the legacy readable stream API
+// If the user uses them, then switch into old mode.
+Readable.prototype.resume = function () {
+  const state = this._readableState
+  if (!state.flowing) {
+    debug('resume')
+    // We flow only if there is no one listening
+    // for readable, but we still have to call
+    // resume().
+    state.flowing = !state.readableListening
+    resume(this, state)
+  }
+  state[kPaused] = false
+  return this
+}
+function resume(stream, state) {
+  if (!state.resumeScheduled) {
+    state.resumeScheduled = true
+    process.nextTick(resume_, stream, state)
+  }
+}
+function resume_(stream, state) {
+  debug('resume', state.reading)
+  if (!state.reading) {
+    stream.read(0)
+  }
+  state.resumeScheduled = false
+  stream.emit('resume')
+  flow(stream)
+  if (state.flowing && !state.reading) stream.read(0)
+}
+Readable.prototype.pause = function () {
+  debug('call pause flowing=%j', this._readableState.flowing)
+  if (this._readableState.flowing !== false) {
+    debug('pause')
+    this._readableState.flowing = false
+    this.emit('pause')
+  }
+  this._readableState[kPaused] = true
+  return this
+}
+function flow(stream) {
+  const state = stream._readableState
+  debug('flow', state.flowing)
+  while (state.flowing && stream.read() !== null);
+}
+
+// Wrap an old-style stream as the async data source.
+// This is *not* part of the readable stream interface.
+// It is an ugly unfortunate mess of history.
+Readable.prototype.wrap = function (stream) {
+  let paused = false
+
+  // TODO (ronag): Should this.destroy(err) emit
+  // 'error' on the wrapped stream? Would require
+  // a static factory method, e.g. Readable.wrap(stream).
+
+  stream.on('data', (chunk) => {
+    if (!this.push(chunk) && stream.pause) {
+      paused = true
+      stream.pause()
+    }
+  })
+  stream.on('end', () => {
+    this.push(null)
+  })
+  stream.on('error', (err) => {
+    errorOrDestroy(this, err)
+  })
+  stream.on('close', () => {
+    this.destroy()
+  })
+  stream.on('destroy', () => {
+    this.destroy()
+  })
+  this._read = () => {
+    if (paused && stream.resume) {
+      paused = false
+      stream.resume()
+    }
+  }
+
+  // Proxy all the other methods. Important when wrapping filters and duplexes.
+  const streamKeys = ObjectKeys(stream)
+  for (let j = 1; j < streamKeys.length; j++) {
+    const i = streamKeys[j]
+    if (this[i] === undefined && typeof stream[i] === 'function') {
+      this[i] = stream[i].bind(stream)
+    }
+  }
+  return this
+}
+Readable.prototype[SymbolAsyncIterator] = function () {
+  return streamToAsyncIterator(this)
+}
+Readable.prototype.iterator = function (options) {
+  if (options !== undefined) {
+    validateObject(options, 'options')
+  }
+  return streamToAsyncIterator(this, options)
+}
+function streamToAsyncIterator(stream, options) {
+  if (typeof stream.read !== 'function') {
+    stream = Readable.wrap(stream, {
+      objectMode: true
+    })
+  }
+  const iter = createAsyncIterator(stream, options)
+  iter.stream = stream
+  return iter
+}
+async function* createAsyncIterator(stream, options) {
+  let callback = nop
+  function next(resolve) {
+    if (this === stream) {
+      callback()
+      callback = nop
+    } else {
+      callback = resolve
+    }
+  }
+  stream.on('readable', next)
+  let error
+  const cleanup = eos(
+    stream,
+    {
+      writable: false
+    },
+    (err) => {
+      error = err ? aggregateTwoErrors(error, err) : null
+      callback()
+      callback = nop
+    }
+  )
+  try {
+    while (true) {
+      const chunk = stream.destroyed ? null : stream.read()
+      if (chunk !== null) {
+        yield chunk
+      } else if (error) {
+        throw error
+      } else if (error === null) {
+        return
+      } else {
+        await new Promise(next)
+      }
+    }
+  } catch (err) {
+    error = aggregateTwoErrors(error, err)
+    throw error
+  } finally {
+    if (
+      (error || (options === null || options === undefined ? undefined : options.destroyOnReturn) !== false) &&
+      (error === undefined || stream._readableState.autoDestroy)
+    ) {
+      destroyImpl.destroyer(stream, null)
+    } else {
+      stream.off('readable', next)
+      cleanup()
+    }
+  }
+}
+
+// Making it explicit these properties are not enumerable
+// because otherwise some prototype manipulation in
+// userland will fail.
+ObjectDefineProperties(Readable.prototype, {
+  readable: {
+    __proto__: null,
+    get() {
+      const r = this._readableState
+      // r.readable === false means that this is part of a Duplex stream
+      // where the readable side was disabled upon construction.
+      // Compat. The user might manually disable readable side through
+      // deprecated setter.
+      return !!r && r.readable !== false && !r.destroyed && !r.errorEmitted && !r.endEmitted
+    },
+    set(val) {
+      // Backwards compat.
+      if (this._readableState) {
+        this._readableState.readable = !!val
+      }
+    }
+  },
+  readableDidRead: {
+    __proto__: null,
+    enumerable: false,
+    get: function () {
+      return this._readableState.dataEmitted
+    }
+  },
+  readableAborted: {
+    __proto__: null,
+    enumerable: false,
+    get: function () {
+      return !!(
+        this._readableState.readable !== false &&
+        (this._readableState.destroyed || this._readableState.errored) &&
+        !this._readableState.endEmitted
+      )
+    }
+  },
+  readableHighWaterMark: {
+    __proto__: null,
+    enumerable: false,
+    get: function () {
+      return this._readableState.highWaterMark
+    }
+  },
+  readableBuffer: {
+    __proto__: null,
+    enumerable: false,
+    get: function () {
+      return this._readableState && this._readableState.buffer
+    }
+  },
+  readableFlowing: {
+    __proto__: null,
+    enumerable: false,
+    get: function () {
+      return this._readableState.flowing
+    },
+    set: function (state) {
+      if (this._readableState) {
+        this._readableState.flowing = state
+      }
+    }
+  },
+  readableLength: {
+    __proto__: null,
+    enumerable: false,
+    get() {
+      return this._readableState.length
+    }
+  },
+  readableObjectMode: {
+    __proto__: null,
+    enumerable: false,
+    get() {
+      return this._readableState ? this._readableState.objectMode : false
+    }
+  },
+  readableEncoding: {
+    __proto__: null,
+    enumerable: false,
+    get() {
+      return this._readableState ? this._readableState.encoding : null
+    }
+  },
+  errored: {
+    __proto__: null,
+    enumerable: false,
+    get() {
+      return this._readableState ? this._readableState.errored : null
+    }
+  },
+  closed: {
+    __proto__: null,
+    get() {
+      return this._readableState ? this._readableState.closed : false
+    }
+  },
+  destroyed: {
+    __proto__: null,
+    enumerable: false,
+    get() {
+      return this._readableState ? this._readableState.destroyed : false
+    },
+    set(value) {
+      // We ignore the value if the stream
+      // has not been initialized yet.
+      if (!this._readableState) {
+        return
+      }
+
+      // Backward compatibility, the user is explicitly
+      // managing destroyed.
+      this._readableState.destroyed = value
+    }
+  },
+  readableEnded: {
+    __proto__: null,
+    enumerable: false,
+    get() {
+      return this._readableState ? this._readableState.endEmitted : false
+    }
+  }
+})
+ObjectDefineProperties(ReadableState.prototype, {
+  // Legacy getter for `pipesCount`.
+  pipesCount: {
+    __proto__: null,
+    get() {
+      return this.pipes.length
+    }
+  },
+  // Legacy property for `paused`.
+  paused: {
+    __proto__: null,
+    get() {
+      return this[kPaused] !== false
+    },
+    set(value) {
+      this[kPaused] = !!value
+    }
+  }
+})
+
+// Exposed for testing purposes only.
+Readable._fromList = fromList
+
+// Pluck off n bytes from an array of buffers.
+// Length is the combined lengths of all the buffers in the list.
+// This function is designed to be inlinable, so please take care when making
+// changes to the function body.
+function fromList(n, state) {
+  // nothing buffered.
+  if (state.length === 0) return null
+  let ret
+  if (state.objectMode) ret = state.buffer.shift()
+  else if (!n || n >= state.length) {
+    // Read it all, truncate the list.
+    if (state.decoder) ret = state.buffer.join('')
+    else if (state.buffer.length === 1) ret = state.buffer.first()
+    else ret = state.buffer.concat(state.length)
+    state.buffer.clear()
+  } else {
+    // read part of list.
+    ret = state.buffer.consume(n, state.decoder)
+  }
+  return ret
+}
+function endReadable(stream) {
+  const state = stream._readableState
+  debug('endReadable', state.endEmitted)
+  if (!state.endEmitted) {
+    state.ended = true
+    process.nextTick(endReadableNT, state, stream)
+  }
+}
+function endReadableNT(state, stream) {
+  debug('endReadableNT', state.endEmitted, state.length)
+
+  // Check that we didn't get one last unshift.
+  if (!state.errored && !state.closeEmitted && !state.endEmitted && state.length === 0) {
+    state.endEmitted = true
+    stream.emit('end')
+    if (stream.writable && stream.allowHalfOpen === false) {
+      process.nextTick(endWritableNT, stream)
+    } else if (state.autoDestroy) {
+      // In case of duplex streams we need a way to detect
+      // if the writable side is ready for autoDestroy as well.
+      const wState = stream._writableState
+      const autoDestroy =
+        !wState ||
+        (wState.autoDestroy &&
+          // We don't expect the writable to ever 'finish'
+          // if writable is explicitly set to false.
+          (wState.finished || wState.writable === false))
+      if (autoDestroy) {
+        stream.destroy()
+      }
+    }
+  }
+}
+function endWritableNT(stream) {
+  const writable = stream.writable && !stream.writableEnded && !stream.destroyed
+  if (writable) {
+    stream.end()
+  }
+}
+Readable.from = function (iterable, opts) {
+  return from(Readable, iterable, opts)
+}
+let webStreamsAdapters
+
+// Lazy to avoid circular references
+function lazyWebStreams() {
+  if (webStreamsAdapters === undefined) webStreamsAdapters = {}
+  return webStreamsAdapters
+}
+Readable.fromWeb = function (readableStream, options) {
+  return lazyWebStreams().newStreamReadableFromReadableStream(readableStream, options)
+}
+Readable.toWeb = function (streamReadable, options) {
+  return lazyWebStreams().newReadableStreamFromStreamReadable(streamReadable, options)
+}
+Readable.wrap = function (src, options) {
+  var _ref, _src$readableObjectMo
+  return new Readable({
+    objectMode:
+      (_ref =
+        (_src$readableObjectMo = src.readableObjectMode) !== null && _src$readableObjectMo !== undefined
+          ? _src$readableObjectMo
+          : src.objectMode) !== null && _ref !== undefined
+        ? _ref
+        : true,
+    ...options,
+    destroy(err, callback) {
+      destroyImpl.destroyer(src, err)
+      callback(err)
+    }
+  }).wrap(src)
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/state.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/state.js
new file mode 100644
index 0000000..79294a0
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/state.js
@@ -0,0 +1,39 @@
+'use strict'
+
+const { MathFloor, NumberIsInteger } = require('../../ours/primordials')
+const { validateInteger } = require('../validators')
+const { ERR_INVALID_ARG_VALUE } = require('../../ours/errors').codes
+let defaultHighWaterMarkBytes = 16 * 1024
+let defaultHighWaterMarkObjectMode = 16
+function highWaterMarkFrom(options, isDuplex, duplexKey) {
+  return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null
+}
+function getDefaultHighWaterMark(objectMode) {
+  return objectMode ? defaultHighWaterMarkObjectMode : defaultHighWaterMarkBytes
+}
+function setDefaultHighWaterMark(objectMode, value) {
+  validateInteger(value, 'value', 0)
+  if (objectMode) {
+    defaultHighWaterMarkObjectMode = value
+  } else {
+    defaultHighWaterMarkBytes = value
+  }
+}
+function getHighWaterMark(state, options, duplexKey, isDuplex) {
+  const hwm = highWaterMarkFrom(options, isDuplex, duplexKey)
+  if (hwm != null) {
+    if (!NumberIsInteger(hwm) || hwm < 0) {
+      const name = isDuplex ? `options.${duplexKey}` : 'options.highWaterMark'
+      throw new ERR_INVALID_ARG_VALUE(name, hwm)
+    }
+    return MathFloor(hwm)
+  }
+
+  // Default value
+  return getDefaultHighWaterMark(state.objectMode)
+}
+module.exports = {
+  getHighWaterMark,
+  getDefaultHighWaterMark,
+  setDefaultHighWaterMark
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/transform.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/transform.js
new file mode 100644
index 0000000..fa9413a
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/transform.js
@@ -0,0 +1,180 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// a transform stream is a readable/writable stream where you do
+// something with the data.  Sometimes it's called a "filter",
+// but that's not a great name for it, since that implies a thing where
+// some bits pass through, and others are simply ignored.  (That would
+// be a valid example of a transform, of course.)
+//
+// While the output is causally related to the input, it's not a
+// necessarily symmetric or synchronous transformation.  For example,
+// a zlib stream might take multiple plain-text writes(), and then
+// emit a single compressed chunk some time in the future.
+//
+// Here's how this works:
+//
+// The Transform stream has all the aspects of the readable and writable
+// stream classes.  When you write(chunk), that calls _write(chunk,cb)
+// internally, and returns false if there's a lot of pending writes
+// buffered up.  When you call read(), that calls _read(n) until
+// there's enough pending readable data buffered up.
+//
+// In a transform stream, the written data is placed in a buffer.  When
+// _read(n) is called, it transforms the queued up data, calling the
+// buffered _write cb's as it consumes chunks.  If consuming a single
+// written chunk would result in multiple output chunks, then the first
+// outputted bit calls the readcb, and subsequent chunks just go into
+// the read buffer, and will cause it to emit 'readable' if necessary.
+//
+// This way, back-pressure is actually determined by the reading side,
+// since _read has to be called to start processing a new chunk.  However,
+// a pathological inflate type of transform can cause excessive buffering
+// here.  For example, imagine a stream where every byte of input is
+// interpreted as an integer from 0-255, and then results in that many
+// bytes of output.  Writing the 4 bytes {ff,ff,ff,ff} would result in
+// 1kb of data being output.  In this case, you could write a very small
+// amount of input, and end up with a very large amount of output.  In
+// such a pathological inflating mechanism, there'd be no way to tell
+// the system to stop doing the transform.  A single 4MB write could
+// cause the system to run out of memory.
+//
+// However, even in such a pathological case, only a single written chunk
+// would be consumed, and then the rest would wait (un-transformed) until
+// the results of the previous transformed chunk were consumed.
+
+'use strict'
+
+const { ObjectSetPrototypeOf, Symbol } = require('../../ours/primordials')
+module.exports = Transform
+const { ERR_METHOD_NOT_IMPLEMENTED } = require('../../ours/errors').codes
+const Duplex = require('./duplex')
+const { getHighWaterMark } = require('./state')
+ObjectSetPrototypeOf(Transform.prototype, Duplex.prototype)
+ObjectSetPrototypeOf(Transform, Duplex)
+const kCallback = Symbol('kCallback')
+function Transform(options) {
+  if (!(this instanceof Transform)) return new Transform(options)
+
+  // TODO (ronag): This should preferably always be
+  // applied but would be semver-major. Or even better;
+  // make Transform a Readable with the Writable interface.
+  const readableHighWaterMark = options ? getHighWaterMark(this, options, 'readableHighWaterMark', true) : null
+  if (readableHighWaterMark === 0) {
+    // A Duplex will buffer both on the writable and readable side while
+    // a Transform just wants to buffer hwm number of elements. To avoid
+    // buffering twice we disable buffering on the writable side.
+    options = {
+      ...options,
+      highWaterMark: null,
+      readableHighWaterMark,
+      // TODO (ronag): 0 is not optimal since we have
+      // a "bug" where we check needDrain before calling _write and not after.
+      // Refs: https://github.com/nodejs/node/pull/32887
+      // Refs: https://github.com/nodejs/node/pull/35941
+      writableHighWaterMark: options.writableHighWaterMark || 0
+    }
+  }
+  Duplex.call(this, options)
+
+  // We have implemented the _read method, and done the other things
+  // that Readable wants before the first _read call, so unset the
+  // sync guard flag.
+  this._readableState.sync = false
+  this[kCallback] = null
+  if (options) {
+    if (typeof options.transform === 'function') this._transform = options.transform
+    if (typeof options.flush === 'function') this._flush = options.flush
+  }
+
+  // When the writable side finishes, then flush out anything remaining.
+  // Backwards compat. Some Transform streams incorrectly implement _final
+  // instead of or in addition to _flush. By using 'prefinish' instead of
+  // implementing _final we continue supporting this unfortunate use case.
+  this.on('prefinish', prefinish)
+}
+function final(cb) {
+  if (typeof this._flush === 'function' && !this.destroyed) {
+    this._flush((er, data) => {
+      if (er) {
+        if (cb) {
+          cb(er)
+        } else {
+          this.destroy(er)
+        }
+        return
+      }
+      if (data != null) {
+        this.push(data)
+      }
+      this.push(null)
+      if (cb) {
+        cb()
+      }
+    })
+  } else {
+    this.push(null)
+    if (cb) {
+      cb()
+    }
+  }
+}
+function prefinish() {
+  if (this._final !== final) {
+    final.call(this)
+  }
+}
+Transform.prototype._final = final
+Transform.prototype._transform = function (chunk, encoding, callback) {
+  throw new ERR_METHOD_NOT_IMPLEMENTED('_transform()')
+}
+Transform.prototype._write = function (chunk, encoding, callback) {
+  const rState = this._readableState
+  const wState = this._writableState
+  const length = rState.length
+  this._transform(chunk, encoding, (err, val) => {
+    if (err) {
+      callback(err)
+      return
+    }
+    if (val != null) {
+      this.push(val)
+    }
+    if (
+      wState.ended ||
+      // Backwards compat.
+      length === rState.length ||
+      // Backwards compat.
+      rState.length < rState.highWaterMark
+    ) {
+      callback()
+    } else {
+      this[kCallback] = callback
+    }
+  })
+}
+Transform.prototype._read = function () {
+  if (this[kCallback]) {
+    const callback = this[kCallback]
+    this[kCallback] = null
+    callback()
+  }
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/utils.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/utils.js
new file mode 100644
index 0000000..f0d7884
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/utils.js
@@ -0,0 +1,327 @@
+'use strict'
+
+const { SymbolAsyncIterator, SymbolIterator, SymbolFor } = require('../../ours/primordials')
+
+// We need to use SymbolFor to make these globally available
+// for interopt with readable-stream, i.e. readable-stream
+// and node core needs to be able to read/write private state
+// from each other for proper interoperability.
+const kIsDestroyed = SymbolFor('nodejs.stream.destroyed')
+const kIsErrored = SymbolFor('nodejs.stream.errored')
+const kIsReadable = SymbolFor('nodejs.stream.readable')
+const kIsWritable = SymbolFor('nodejs.stream.writable')
+const kIsDisturbed = SymbolFor('nodejs.stream.disturbed')
+const kIsClosedPromise = SymbolFor('nodejs.webstream.isClosedPromise')
+const kControllerErrorFunction = SymbolFor('nodejs.webstream.controllerErrorFunction')
+function isReadableNodeStream(obj, strict = false) {
+  var _obj$_readableState
+  return !!(
+    (
+      obj &&
+      typeof obj.pipe === 'function' &&
+      typeof obj.on === 'function' &&
+      (!strict || (typeof obj.pause === 'function' && typeof obj.resume === 'function')) &&
+      (!obj._writableState ||
+        ((_obj$_readableState = obj._readableState) === null || _obj$_readableState === undefined
+          ? undefined
+          : _obj$_readableState.readable) !== false) &&
+      // Duplex
+      (!obj._writableState || obj._readableState)
+    ) // Writable has .pipe.
+  )
+}
+function isWritableNodeStream(obj) {
+  var _obj$_writableState
+  return !!(
+    (
+      obj &&
+      typeof obj.write === 'function' &&
+      typeof obj.on === 'function' &&
+      (!obj._readableState ||
+        ((_obj$_writableState = obj._writableState) === null || _obj$_writableState === undefined
+          ? undefined
+          : _obj$_writableState.writable) !== false)
+    ) // Duplex
+  )
+}
+function isDuplexNodeStream(obj) {
+  return !!(
+    obj &&
+    typeof obj.pipe === 'function' &&
+    obj._readableState &&
+    typeof obj.on === 'function' &&
+    typeof obj.write === 'function'
+  )
+}
+function isNodeStream(obj) {
+  return (
+    obj &&
+    (obj._readableState ||
+      obj._writableState ||
+      (typeof obj.write === 'function' && typeof obj.on === 'function') ||
+      (typeof obj.pipe === 'function' && typeof obj.on === 'function'))
+  )
+}
+function isReadableStream(obj) {
+  return !!(
+    obj &&
+    !isNodeStream(obj) &&
+    typeof obj.pipeThrough === 'function' &&
+    typeof obj.getReader === 'function' &&
+    typeof obj.cancel === 'function'
+  )
+}
+function isWritableStream(obj) {
+  return !!(obj && !isNodeStream(obj) && typeof obj.getWriter === 'function' && typeof obj.abort === 'function')
+}
+function isTransformStream(obj) {
+  return !!(obj && !isNodeStream(obj) && typeof obj.readable === 'object' && typeof obj.writable === 'object')
+}
+function isWebStream(obj) {
+  return isReadableStream(obj) || isWritableStream(obj) || isTransformStream(obj)
+}
+function isIterable(obj, isAsync) {
+  if (obj == null) return false
+  if (isAsync === true) return typeof obj[SymbolAsyncIterator] === 'function'
+  if (isAsync === false) return typeof obj[SymbolIterator] === 'function'
+  return typeof obj[SymbolAsyncIterator] === 'function' || typeof obj[SymbolIterator] === 'function'
+}
+function isDestroyed(stream) {
+  if (!isNodeStream(stream)) return null
+  const wState = stream._writableState
+  const rState = stream._readableState
+  const state = wState || rState
+  return !!(stream.destroyed || stream[kIsDestroyed] || (state !== null && state !== undefined && state.destroyed))
+}
+
+// Have been end():d.
+function isWritableEnded(stream) {
+  if (!isWritableNodeStream(stream)) return null
+  if (stream.writableEnded === true) return true
+  const wState = stream._writableState
+  if (wState !== null && wState !== undefined && wState.errored) return false
+  if (typeof (wState === null || wState === undefined ? undefined : wState.ended) !== 'boolean') return null
+  return wState.ended
+}
+
+// Have emitted 'finish'.
+function isWritableFinished(stream, strict) {
+  if (!isWritableNodeStream(stream)) return null
+  if (stream.writableFinished === true) return true
+  const wState = stream._writableState
+  if (wState !== null && wState !== undefined && wState.errored) return false
+  if (typeof (wState === null || wState === undefined ? undefined : wState.finished) !== 'boolean') return null
+  return !!(wState.finished || (strict === false && wState.ended === true && wState.length === 0))
+}
+
+// Have been push(null):d.
+function isReadableEnded(stream) {
+  if (!isReadableNodeStream(stream)) return null
+  if (stream.readableEnded === true) return true
+  const rState = stream._readableState
+  if (!rState || rState.errored) return false
+  if (typeof (rState === null || rState === undefined ? undefined : rState.ended) !== 'boolean') return null
+  return rState.ended
+}
+
+// Have emitted 'end'.
+function isReadableFinished(stream, strict) {
+  if (!isReadableNodeStream(stream)) return null
+  const rState = stream._readableState
+  if (rState !== null && rState !== undefined && rState.errored) return false
+  if (typeof (rState === null || rState === undefined ? undefined : rState.endEmitted) !== 'boolean') return null
+  return !!(rState.endEmitted || (strict === false && rState.ended === true && rState.length === 0))
+}
+function isReadable(stream) {
+  if (stream && stream[kIsReadable] != null) return stream[kIsReadable]
+  if (typeof (stream === null || stream === undefined ? undefined : stream.readable) !== 'boolean') return null
+  if (isDestroyed(stream)) return false
+  return isReadableNodeStream(stream) && stream.readable && !isReadableFinished(stream)
+}
+function isWritable(stream) {
+  if (stream && stream[kIsWritable] != null) return stream[kIsWritable]
+  if (typeof (stream === null || stream === undefined ? undefined : stream.writable) !== 'boolean') return null
+  if (isDestroyed(stream)) return false
+  return isWritableNodeStream(stream) && stream.writable && !isWritableEnded(stream)
+}
+function isFinished(stream, opts) {
+  if (!isNodeStream(stream)) {
+    return null
+  }
+  if (isDestroyed(stream)) {
+    return true
+  }
+  if ((opts === null || opts === undefined ? undefined : opts.readable) !== false && isReadable(stream)) {
+    return false
+  }
+  if ((opts === null || opts === undefined ? undefined : opts.writable) !== false && isWritable(stream)) {
+    return false
+  }
+  return true
+}
+function isWritableErrored(stream) {
+  var _stream$_writableStat, _stream$_writableStat2
+  if (!isNodeStream(stream)) {
+    return null
+  }
+  if (stream.writableErrored) {
+    return stream.writableErrored
+  }
+  return (_stream$_writableStat =
+    (_stream$_writableStat2 = stream._writableState) === null || _stream$_writableStat2 === undefined
+      ? undefined
+      : _stream$_writableStat2.errored) !== null && _stream$_writableStat !== undefined
+    ? _stream$_writableStat
+    : null
+}
+function isReadableErrored(stream) {
+  var _stream$_readableStat, _stream$_readableStat2
+  if (!isNodeStream(stream)) {
+    return null
+  }
+  if (stream.readableErrored) {
+    return stream.readableErrored
+  }
+  return (_stream$_readableStat =
+    (_stream$_readableStat2 = stream._readableState) === null || _stream$_readableStat2 === undefined
+      ? undefined
+      : _stream$_readableStat2.errored) !== null && _stream$_readableStat !== undefined
+    ? _stream$_readableStat
+    : null
+}
+function isClosed(stream) {
+  if (!isNodeStream(stream)) {
+    return null
+  }
+  if (typeof stream.closed === 'boolean') {
+    return stream.closed
+  }
+  const wState = stream._writableState
+  const rState = stream._readableState
+  if (
+    typeof (wState === null || wState === undefined ? undefined : wState.closed) === 'boolean' ||
+    typeof (rState === null || rState === undefined ? undefined : rState.closed) === 'boolean'
+  ) {
+    return (
+      (wState === null || wState === undefined ? undefined : wState.closed) ||
+      (rState === null || rState === undefined ? undefined : rState.closed)
+    )
+  }
+  if (typeof stream._closed === 'boolean' && isOutgoingMessage(stream)) {
+    return stream._closed
+  }
+  return null
+}
+function isOutgoingMessage(stream) {
+  return (
+    typeof stream._closed === 'boolean' &&
+    typeof stream._defaultKeepAlive === 'boolean' &&
+    typeof stream._removedConnection === 'boolean' &&
+    typeof stream._removedContLen === 'boolean'
+  )
+}
+function isServerResponse(stream) {
+  return typeof stream._sent100 === 'boolean' && isOutgoingMessage(stream)
+}
+function isServerRequest(stream) {
+  var _stream$req
+  return (
+    typeof stream._consuming === 'boolean' &&
+    typeof stream._dumped === 'boolean' &&
+    ((_stream$req = stream.req) === null || _stream$req === undefined ? undefined : _stream$req.upgradeOrConnect) ===
+      undefined
+  )
+}
+function willEmitClose(stream) {
+  if (!isNodeStream(stream)) return null
+  const wState = stream._writableState
+  const rState = stream._readableState
+  const state = wState || rState
+  return (
+    (!state && isServerResponse(stream)) || !!(state && state.autoDestroy && state.emitClose && state.closed === false)
+  )
+}
+function isDisturbed(stream) {
+  var _stream$kIsDisturbed
+  return !!(
+    stream &&
+    ((_stream$kIsDisturbed = stream[kIsDisturbed]) !== null && _stream$kIsDisturbed !== undefined
+      ? _stream$kIsDisturbed
+      : stream.readableDidRead || stream.readableAborted)
+  )
+}
+function isErrored(stream) {
+  var _ref,
+    _ref2,
+    _ref3,
+    _ref4,
+    _ref5,
+    _stream$kIsErrored,
+    _stream$_readableStat3,
+    _stream$_writableStat3,
+    _stream$_readableStat4,
+    _stream$_writableStat4
+  return !!(
+    stream &&
+    ((_ref =
+      (_ref2 =
+        (_ref3 =
+          (_ref4 =
+            (_ref5 =
+              (_stream$kIsErrored = stream[kIsErrored]) !== null && _stream$kIsErrored !== undefined
+                ? _stream$kIsErrored
+                : stream.readableErrored) !== null && _ref5 !== undefined
+              ? _ref5
+              : stream.writableErrored) !== null && _ref4 !== undefined
+            ? _ref4
+            : (_stream$_readableStat3 = stream._readableState) === null || _stream$_readableStat3 === undefined
+            ? undefined
+            : _stream$_readableStat3.errorEmitted) !== null && _ref3 !== undefined
+          ? _ref3
+          : (_stream$_writableStat3 = stream._writableState) === null || _stream$_writableStat3 === undefined
+          ? undefined
+          : _stream$_writableStat3.errorEmitted) !== null && _ref2 !== undefined
+        ? _ref2
+        : (_stream$_readableStat4 = stream._readableState) === null || _stream$_readableStat4 === undefined
+        ? undefined
+        : _stream$_readableStat4.errored) !== null && _ref !== undefined
+      ? _ref
+      : (_stream$_writableStat4 = stream._writableState) === null || _stream$_writableStat4 === undefined
+      ? undefined
+      : _stream$_writableStat4.errored)
+  )
+}
+module.exports = {
+  isDestroyed,
+  kIsDestroyed,
+  isDisturbed,
+  kIsDisturbed,
+  isErrored,
+  kIsErrored,
+  isReadable,
+  kIsReadable,
+  kIsClosedPromise,
+  kControllerErrorFunction,
+  kIsWritable,
+  isClosed,
+  isDuplexNodeStream,
+  isFinished,
+  isIterable,
+  isReadableNodeStream,
+  isReadableStream,
+  isReadableEnded,
+  isReadableFinished,
+  isReadableErrored,
+  isNodeStream,
+  isWebStream,
+  isWritable,
+  isWritableNodeStream,
+  isWritableStream,
+  isWritableEnded,
+  isWritableFinished,
+  isWritableErrored,
+  isServerRequest,
+  isServerResponse,
+  willEmitClose,
+  isTransformStream
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/streams/writable.js b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/writable.js
new file mode 100644
index 0000000..b4ecf0e
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/streams/writable.js
@@ -0,0 +1,819 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+// A bit simpler than readable streams.
+// Implement an async ._write(chunk, encoding, cb), and it'll handle all
+// the drain event emission and buffering.
+
+'use strict'
+
+/* replacement start */
+
+const process = require('process/')
+
+/* replacement end */
+
+const {
+  ArrayPrototypeSlice,
+  Error,
+  FunctionPrototypeSymbolHasInstance,
+  ObjectDefineProperty,
+  ObjectDefineProperties,
+  ObjectSetPrototypeOf,
+  StringPrototypeToLowerCase,
+  Symbol,
+  SymbolHasInstance
+} = require('../../ours/primordials')
+module.exports = Writable
+Writable.WritableState = WritableState
+const { EventEmitter: EE } = require('events')
+const Stream = require('./legacy').Stream
+const { Buffer } = require('buffer')
+const destroyImpl = require('./destroy')
+const { addAbortSignal } = require('./add-abort-signal')
+const { getHighWaterMark, getDefaultHighWaterMark } = require('./state')
+const {
+  ERR_INVALID_ARG_TYPE,
+  ERR_METHOD_NOT_IMPLEMENTED,
+  ERR_MULTIPLE_CALLBACK,
+  ERR_STREAM_CANNOT_PIPE,
+  ERR_STREAM_DESTROYED,
+  ERR_STREAM_ALREADY_FINISHED,
+  ERR_STREAM_NULL_VALUES,
+  ERR_STREAM_WRITE_AFTER_END,
+  ERR_UNKNOWN_ENCODING
+} = require('../../ours/errors').codes
+const { errorOrDestroy } = destroyImpl
+ObjectSetPrototypeOf(Writable.prototype, Stream.prototype)
+ObjectSetPrototypeOf(Writable, Stream)
+function nop() {}
+const kOnFinished = Symbol('kOnFinished')
+function WritableState(options, stream, isDuplex) {
+  // Duplex streams are both readable and writable, but share
+  // the same options object.
+  // However, some cases require setting options to different
+  // values for the readable and the writable sides of the duplex stream,
+  // e.g. options.readableObjectMode vs. options.writableObjectMode, etc.
+  if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof require('./duplex')
+
+  // Object stream flag to indicate whether or not this stream
+  // contains buffers or objects.
+  this.objectMode = !!(options && options.objectMode)
+  if (isDuplex) this.objectMode = this.objectMode || !!(options && options.writableObjectMode)
+
+  // The point at which write() starts returning false
+  // Note: 0 is a valid value, means that we always return false if
+  // the entire buffer is not flushed immediately on write().
+  this.highWaterMark = options
+    ? getHighWaterMark(this, options, 'writableHighWaterMark', isDuplex)
+    : getDefaultHighWaterMark(false)
+
+  // if _final has been called.
+  this.finalCalled = false
+
+  // drain event flag.
+  this.needDrain = false
+  // At the start of calling end()
+  this.ending = false
+  // When end() has been called, and returned.
+  this.ended = false
+  // When 'finish' is emitted.
+  this.finished = false
+
+  // Has it been destroyed
+  this.destroyed = false
+
+  // Should we decode strings into buffers before passing to _write?
+  // this is here so that some node-core streams can optimize string
+  // handling at a lower level.
+  const noDecode = !!(options && options.decodeStrings === false)
+  this.decodeStrings = !noDecode
+
+  // Crypto is kind of old and crusty.  Historically, its default string
+  // encoding is 'binary' so we have to make this configurable.
+  // Everything else in the universe uses 'utf8', though.
+  this.defaultEncoding = (options && options.defaultEncoding) || 'utf8'
+
+  // Not an actual buffer we keep track of, but a measurement
+  // of how much we're waiting to get pushed to some underlying
+  // socket or file.
+  this.length = 0
+
+  // A flag to see when we're in the middle of a write.
+  this.writing = false
+
+  // When true all writes will be buffered until .uncork() call.
+  this.corked = 0
+
+  // A flag to be able to tell if the onwrite cb is called immediately,
+  // or on a later tick.  We set this to true at first, because any
+  // actions that shouldn't happen until "later" should generally also
+  // not happen before the first write call.
+  this.sync = true
+
+  // A flag to know if we're processing previously buffered items, which
+  // may call the _write() callback in the same tick, so that we don't
+  // end up in an overlapped onwrite situation.
+  this.bufferProcessing = false
+
+  // The callback that's passed to _write(chunk, cb).
+  this.onwrite = onwrite.bind(undefined, stream)
+
+  // The callback that the user supplies to write(chunk, encoding, cb).
+  this.writecb = null
+
+  // The amount that is being written when _write is called.
+  this.writelen = 0
+
+  // Storage for data passed to the afterWrite() callback in case of
+  // synchronous _write() completion.
+  this.afterWriteTickInfo = null
+  resetBuffer(this)
+
+  // Number of pending user-supplied write callbacks
+  // this must be 0 before 'finish' can be emitted.
+  this.pendingcb = 0
+
+  // Stream is still being constructed and cannot be
+  // destroyed until construction finished or failed.
+  // Async construction is opt in, therefore we start as
+  // constructed.
+  this.constructed = true
+
+  // Emit prefinish if the only thing we're waiting for is _write cbs
+  // This is relevant for synchronous Transform streams.
+  this.prefinished = false
+
+  // True if the error was already emitted and should not be thrown again.
+  this.errorEmitted = false
+
+  // Should close be emitted on destroy. Defaults to true.
+  this.emitClose = !options || options.emitClose !== false
+
+  // Should .destroy() be called after 'finish' (and potentially 'end').
+  this.autoDestroy = !options || options.autoDestroy !== false
+
+  // Indicates whether the stream has errored. When true all write() calls
+  // should return false. This is needed since when autoDestroy
+  // is disabled we need a way to tell whether the stream has failed.
+  this.errored = null
+
+  // Indicates whether the stream has finished destroying.
+  this.closed = false
+
+  // True if close has been emitted or would have been emitted
+  // depending on emitClose.
+  this.closeEmitted = false
+  this[kOnFinished] = []
+}
+function resetBuffer(state) {
+  state.buffered = []
+  state.bufferedIndex = 0
+  state.allBuffers = true
+  state.allNoop = true
+}
+WritableState.prototype.getBuffer = function getBuffer() {
+  return ArrayPrototypeSlice(this.buffered, this.bufferedIndex)
+}
+ObjectDefineProperty(WritableState.prototype, 'bufferedRequestCount', {
+  __proto__: null,
+  get() {
+    return this.buffered.length - this.bufferedIndex
+  }
+})
+function Writable(options) {
+  // Writable ctor is applied to Duplexes, too.
+  // `realHasInstance` is necessary because using plain `instanceof`
+  // would return false, as no `_writableState` property is attached.
+
+  // Trying to use the custom `instanceof` for Writable here will also break the
+  // Node.js LazyTransform implementation, which has a non-trivial getter for
+  // `_writableState` that would lead to infinite recursion.
+
+  // Checking for a Stream.Duplex instance is faster here instead of inside
+  // the WritableState constructor, at least with V8 6.5.
+  const isDuplex = this instanceof require('./duplex')
+  if (!isDuplex && !FunctionPrototypeSymbolHasInstance(Writable, this)) return new Writable(options)
+  this._writableState = new WritableState(options, this, isDuplex)
+  if (options) {
+    if (typeof options.write === 'function') this._write = options.write
+    if (typeof options.writev === 'function') this._writev = options.writev
+    if (typeof options.destroy === 'function') this._destroy = options.destroy
+    if (typeof options.final === 'function') this._final = options.final
+    if (typeof options.construct === 'function') this._construct = options.construct
+    if (options.signal) addAbortSignal(options.signal, this)
+  }
+  Stream.call(this, options)
+  destroyImpl.construct(this, () => {
+    const state = this._writableState
+    if (!state.writing) {
+      clearBuffer(this, state)
+    }
+    finishMaybe(this, state)
+  })
+}
+ObjectDefineProperty(Writable, SymbolHasInstance, {
+  __proto__: null,
+  value: function (object) {
+    if (FunctionPrototypeSymbolHasInstance(this, object)) return true
+    if (this !== Writable) return false
+    return object && object._writableState instanceof WritableState
+  }
+})
+
+// Otherwise people can pipe Writable streams, which is just wrong.
+Writable.prototype.pipe = function () {
+  errorOrDestroy(this, new ERR_STREAM_CANNOT_PIPE())
+}
+function _write(stream, chunk, encoding, cb) {
+  const state = stream._writableState
+  if (typeof encoding === 'function') {
+    cb = encoding
+    encoding = state.defaultEncoding
+  } else {
+    if (!encoding) encoding = state.defaultEncoding
+    else if (encoding !== 'buffer' && !Buffer.isEncoding(encoding)) throw new ERR_UNKNOWN_ENCODING(encoding)
+    if (typeof cb !== 'function') cb = nop
+  }
+  if (chunk === null) {
+    throw new ERR_STREAM_NULL_VALUES()
+  } else if (!state.objectMode) {
+    if (typeof chunk === 'string') {
+      if (state.decodeStrings !== false) {
+        chunk = Buffer.from(chunk, encoding)
+        encoding = 'buffer'
+      }
+    } else if (chunk instanceof Buffer) {
+      encoding = 'buffer'
+    } else if (Stream._isUint8Array(chunk)) {
+      chunk = Stream._uint8ArrayToBuffer(chunk)
+      encoding = 'buffer'
+    } else {
+      throw new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer', 'Uint8Array'], chunk)
+    }
+  }
+  let err
+  if (state.ending) {
+    err = new ERR_STREAM_WRITE_AFTER_END()
+  } else if (state.destroyed) {
+    err = new ERR_STREAM_DESTROYED('write')
+  }
+  if (err) {
+    process.nextTick(cb, err)
+    errorOrDestroy(stream, err, true)
+    return err
+  }
+  state.pendingcb++
+  return writeOrBuffer(stream, state, chunk, encoding, cb)
+}
+Writable.prototype.write = function (chunk, encoding, cb) {
+  return _write(this, chunk, encoding, cb) === true
+}
+Writable.prototype.cork = function () {
+  this._writableState.corked++
+}
+Writable.prototype.uncork = function () {
+  const state = this._writableState
+  if (state.corked) {
+    state.corked--
+    if (!state.writing) clearBuffer(this, state)
+  }
+}
+Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
+  // node::ParseEncoding() requires lower case.
+  if (typeof encoding === 'string') encoding = StringPrototypeToLowerCase(encoding)
+  if (!Buffer.isEncoding(encoding)) throw new ERR_UNKNOWN_ENCODING(encoding)
+  this._writableState.defaultEncoding = encoding
+  return this
+}
+
+// If we're already writing something, then just put this
+// in the queue, and wait our turn.  Otherwise, call _write
+// If we return false, then we need a drain event, so set that flag.
+function writeOrBuffer(stream, state, chunk, encoding, callback) {
+  const len = state.objectMode ? 1 : chunk.length
+  state.length += len
+
+  // stream._write resets state.length
+  const ret = state.length < state.highWaterMark
+  // We must ensure that previous needDrain will not be reset to false.
+  if (!ret) state.needDrain = true
+  if (state.writing || state.corked || state.errored || !state.constructed) {
+    state.buffered.push({
+      chunk,
+      encoding,
+      callback
+    })
+    if (state.allBuffers && encoding !== 'buffer') {
+      state.allBuffers = false
+    }
+    if (state.allNoop && callback !== nop) {
+      state.allNoop = false
+    }
+  } else {
+    state.writelen = len
+    state.writecb = callback
+    state.writing = true
+    state.sync = true
+    stream._write(chunk, encoding, state.onwrite)
+    state.sync = false
+  }
+
+  // Return false if errored or destroyed in order to break
+  // any synchronous while(stream.write(data)) loops.
+  return ret && !state.errored && !state.destroyed
+}
+function doWrite(stream, state, writev, len, chunk, encoding, cb) {
+  state.writelen = len
+  state.writecb = cb
+  state.writing = true
+  state.sync = true
+  if (state.destroyed) state.onwrite(new ERR_STREAM_DESTROYED('write'))
+  else if (writev) stream._writev(chunk, state.onwrite)
+  else stream._write(chunk, encoding, state.onwrite)
+  state.sync = false
+}
+function onwriteError(stream, state, er, cb) {
+  --state.pendingcb
+  cb(er)
+  // Ensure callbacks are invoked even when autoDestroy is
+  // not enabled. Passing `er` here doesn't make sense since
+  // it's related to one specific write, not to the buffered
+  // writes.
+  errorBuffer(state)
+  // This can emit error, but error must always follow cb.
+  errorOrDestroy(stream, er)
+}
+function onwrite(stream, er) {
+  const state = stream._writableState
+  const sync = state.sync
+  const cb = state.writecb
+  if (typeof cb !== 'function') {
+    errorOrDestroy(stream, new ERR_MULTIPLE_CALLBACK())
+    return
+  }
+  state.writing = false
+  state.writecb = null
+  state.length -= state.writelen
+  state.writelen = 0
+  if (er) {
+    // Avoid V8 leak, https://github.com/nodejs/node/pull/34103#issuecomment-652002364
+    er.stack // eslint-disable-line no-unused-expressions
+
+    if (!state.errored) {
+      state.errored = er
+    }
+
+    // In case of duplex streams we need to notify the readable side of the
+    // error.
+    if (stream._readableState && !stream._readableState.errored) {
+      stream._readableState.errored = er
+    }
+    if (sync) {
+      process.nextTick(onwriteError, stream, state, er, cb)
+    } else {
+      onwriteError(stream, state, er, cb)
+    }
+  } else {
+    if (state.buffered.length > state.bufferedIndex) {
+      clearBuffer(stream, state)
+    }
+    if (sync) {
+      // It is a common case that the callback passed to .write() is always
+      // the same. In that case, we do not schedule a new nextTick(), but
+      // rather just increase a counter, to improve performance and avoid
+      // memory allocations.
+      if (state.afterWriteTickInfo !== null && state.afterWriteTickInfo.cb === cb) {
+        state.afterWriteTickInfo.count++
+      } else {
+        state.afterWriteTickInfo = {
+          count: 1,
+          cb,
+          stream,
+          state
+        }
+        process.nextTick(afterWriteTick, state.afterWriteTickInfo)
+      }
+    } else {
+      afterWrite(stream, state, 1, cb)
+    }
+  }
+}
+function afterWriteTick({ stream, state, count, cb }) {
+  state.afterWriteTickInfo = null
+  return afterWrite(stream, state, count, cb)
+}
+function afterWrite(stream, state, count, cb) {
+  const needDrain = !state.ending && !stream.destroyed && state.length === 0 && state.needDrain
+  if (needDrain) {
+    state.needDrain = false
+    stream.emit('drain')
+  }
+  while (count-- > 0) {
+    state.pendingcb--
+    cb()
+  }
+  if (state.destroyed) {
+    errorBuffer(state)
+  }
+  finishMaybe(stream, state)
+}
+
+// If there's something in the buffer waiting, then invoke callbacks.
+function errorBuffer(state) {
+  if (state.writing) {
+    return
+  }
+  for (let n = state.bufferedIndex; n < state.buffered.length; ++n) {
+    var _state$errored
+    const { chunk, callback } = state.buffered[n]
+    const len = state.objectMode ? 1 : chunk.length
+    state.length -= len
+    callback(
+      (_state$errored = state.errored) !== null && _state$errored !== undefined
+        ? _state$errored
+        : new ERR_STREAM_DESTROYED('write')
+    )
+  }
+  const onfinishCallbacks = state[kOnFinished].splice(0)
+  for (let i = 0; i < onfinishCallbacks.length; i++) {
+    var _state$errored2
+    onfinishCallbacks[i](
+      (_state$errored2 = state.errored) !== null && _state$errored2 !== undefined
+        ? _state$errored2
+        : new ERR_STREAM_DESTROYED('end')
+    )
+  }
+  resetBuffer(state)
+}
+
+// If there's something in the buffer waiting, then process it.
+function clearBuffer(stream, state) {
+  if (state.corked || state.bufferProcessing || state.destroyed || !state.constructed) {
+    return
+  }
+  const { buffered, bufferedIndex, objectMode } = state
+  const bufferedLength = buffered.length - bufferedIndex
+  if (!bufferedLength) {
+    return
+  }
+  let i = bufferedIndex
+  state.bufferProcessing = true
+  if (bufferedLength > 1 && stream._writev) {
+    state.pendingcb -= bufferedLength - 1
+    const callback = state.allNoop
+      ? nop
+      : (err) => {
+          for (let n = i; n < buffered.length; ++n) {
+            buffered[n].callback(err)
+          }
+        }
+    // Make a copy of `buffered` if it's going to be used by `callback` above,
+    // since `doWrite` will mutate the array.
+    const chunks = state.allNoop && i === 0 ? buffered : ArrayPrototypeSlice(buffered, i)
+    chunks.allBuffers = state.allBuffers
+    doWrite(stream, state, true, state.length, chunks, '', callback)
+    resetBuffer(state)
+  } else {
+    do {
+      const { chunk, encoding, callback } = buffered[i]
+      buffered[i++] = null
+      const len = objectMode ? 1 : chunk.length
+      doWrite(stream, state, false, len, chunk, encoding, callback)
+    } while (i < buffered.length && !state.writing)
+    if (i === buffered.length) {
+      resetBuffer(state)
+    } else if (i > 256) {
+      buffered.splice(0, i)
+      state.bufferedIndex = 0
+    } else {
+      state.bufferedIndex = i
+    }
+  }
+  state.bufferProcessing = false
+}
+Writable.prototype._write = function (chunk, encoding, cb) {
+  if (this._writev) {
+    this._writev(
+      [
+        {
+          chunk,
+          encoding
+        }
+      ],
+      cb
+    )
+  } else {
+    throw new ERR_METHOD_NOT_IMPLEMENTED('_write()')
+  }
+}
+Writable.prototype._writev = null
+Writable.prototype.end = function (chunk, encoding, cb) {
+  const state = this._writableState
+  if (typeof chunk === 'function') {
+    cb = chunk
+    chunk = null
+    encoding = null
+  } else if (typeof encoding === 'function') {
+    cb = encoding
+    encoding = null
+  }
+  let err
+  if (chunk !== null && chunk !== undefined) {
+    const ret = _write(this, chunk, encoding)
+    if (ret instanceof Error) {
+      err = ret
+    }
+  }
+
+  // .end() fully uncorks.
+  if (state.corked) {
+    state.corked = 1
+    this.uncork()
+  }
+  if (err) {
+    // Do nothing...
+  } else if (!state.errored && !state.ending) {
+    // This is forgiving in terms of unnecessary calls to end() and can hide
+    // logic errors. However, usually such errors are harmless and causing a
+    // hard error can be disproportionately destructive. It is not always
+    // trivial for the user to determine whether end() needs to be called
+    // or not.
+
+    state.ending = true
+    finishMaybe(this, state, true)
+    state.ended = true
+  } else if (state.finished) {
+    err = new ERR_STREAM_ALREADY_FINISHED('end')
+  } else if (state.destroyed) {
+    err = new ERR_STREAM_DESTROYED('end')
+  }
+  if (typeof cb === 'function') {
+    if (err || state.finished) {
+      process.nextTick(cb, err)
+    } else {
+      state[kOnFinished].push(cb)
+    }
+  }
+  return this
+}
+function needFinish(state) {
+  return (
+    state.ending &&
+    !state.destroyed &&
+    state.constructed &&
+    state.length === 0 &&
+    !state.errored &&
+    state.buffered.length === 0 &&
+    !state.finished &&
+    !state.writing &&
+    !state.errorEmitted &&
+    !state.closeEmitted
+  )
+}
+function callFinal(stream, state) {
+  let called = false
+  function onFinish(err) {
+    if (called) {
+      errorOrDestroy(stream, err !== null && err !== undefined ? err : ERR_MULTIPLE_CALLBACK())
+      return
+    }
+    called = true
+    state.pendingcb--
+    if (err) {
+      const onfinishCallbacks = state[kOnFinished].splice(0)
+      for (let i = 0; i < onfinishCallbacks.length; i++) {
+        onfinishCallbacks[i](err)
+      }
+      errorOrDestroy(stream, err, state.sync)
+    } else if (needFinish(state)) {
+      state.prefinished = true
+      stream.emit('prefinish')
+      // Backwards compat. Don't check state.sync here.
+      // Some streams assume 'finish' will be emitted
+      // asynchronously relative to _final callback.
+      state.pendingcb++
+      process.nextTick(finish, stream, state)
+    }
+  }
+  state.sync = true
+  state.pendingcb++
+  try {
+    stream._final(onFinish)
+  } catch (err) {
+    onFinish(err)
+  }
+  state.sync = false
+}
+function prefinish(stream, state) {
+  if (!state.prefinished && !state.finalCalled) {
+    if (typeof stream._final === 'function' && !state.destroyed) {
+      state.finalCalled = true
+      callFinal(stream, state)
+    } else {
+      state.prefinished = true
+      stream.emit('prefinish')
+    }
+  }
+}
+function finishMaybe(stream, state, sync) {
+  if (needFinish(state)) {
+    prefinish(stream, state)
+    if (state.pendingcb === 0) {
+      if (sync) {
+        state.pendingcb++
+        process.nextTick(
+          (stream, state) => {
+            if (needFinish(state)) {
+              finish(stream, state)
+            } else {
+              state.pendingcb--
+            }
+          },
+          stream,
+          state
+        )
+      } else if (needFinish(state)) {
+        state.pendingcb++
+        finish(stream, state)
+      }
+    }
+  }
+}
+function finish(stream, state) {
+  state.pendingcb--
+  state.finished = true
+  const onfinishCallbacks = state[kOnFinished].splice(0)
+  for (let i = 0; i < onfinishCallbacks.length; i++) {
+    onfinishCallbacks[i]()
+  }
+  stream.emit('finish')
+  if (state.autoDestroy) {
+    // In case of duplex streams we need a way to detect
+    // if the readable side is ready for autoDestroy as well.
+    const rState = stream._readableState
+    const autoDestroy =
+      !rState ||
+      (rState.autoDestroy &&
+        // We don't expect the readable to ever 'end'
+        // if readable is explicitly set to false.
+        (rState.endEmitted || rState.readable === false))
+    if (autoDestroy) {
+      stream.destroy()
+    }
+  }
+}
+ObjectDefineProperties(Writable.prototype, {
+  closed: {
+    __proto__: null,
+    get() {
+      return this._writableState ? this._writableState.closed : false
+    }
+  },
+  destroyed: {
+    __proto__: null,
+    get() {
+      return this._writableState ? this._writableState.destroyed : false
+    },
+    set(value) {
+      // Backward compatibility, the user is explicitly managing destroyed.
+      if (this._writableState) {
+        this._writableState.destroyed = value
+      }
+    }
+  },
+  writable: {
+    __proto__: null,
+    get() {
+      const w = this._writableState
+      // w.writable === false means that this is part of a Duplex stream
+      // where the writable side was disabled upon construction.
+      // Compat. The user might manually disable writable side through
+      // deprecated setter.
+      return !!w && w.writable !== false && !w.destroyed && !w.errored && !w.ending && !w.ended
+    },
+    set(val) {
+      // Backwards compatible.
+      if (this._writableState) {
+        this._writableState.writable = !!val
+      }
+    }
+  },
+  writableFinished: {
+    __proto__: null,
+    get() {
+      return this._writableState ? this._writableState.finished : false
+    }
+  },
+  writableObjectMode: {
+    __proto__: null,
+    get() {
+      return this._writableState ? this._writableState.objectMode : false
+    }
+  },
+  writableBuffer: {
+    __proto__: null,
+    get() {
+      return this._writableState && this._writableState.getBuffer()
+    }
+  },
+  writableEnded: {
+    __proto__: null,
+    get() {
+      return this._writableState ? this._writableState.ending : false
+    }
+  },
+  writableNeedDrain: {
+    __proto__: null,
+    get() {
+      const wState = this._writableState
+      if (!wState) return false
+      return !wState.destroyed && !wState.ending && wState.needDrain
+    }
+  },
+  writableHighWaterMark: {
+    __proto__: null,
+    get() {
+      return this._writableState && this._writableState.highWaterMark
+    }
+  },
+  writableCorked: {
+    __proto__: null,
+    get() {
+      return this._writableState ? this._writableState.corked : 0
+    }
+  },
+  writableLength: {
+    __proto__: null,
+    get() {
+      return this._writableState && this._writableState.length
+    }
+  },
+  errored: {
+    __proto__: null,
+    enumerable: false,
+    get() {
+      return this._writableState ? this._writableState.errored : null
+    }
+  },
+  writableAborted: {
+    __proto__: null,
+    enumerable: false,
+    get: function () {
+      return !!(
+        this._writableState.writable !== false &&
+        (this._writableState.destroyed || this._writableState.errored) &&
+        !this._writableState.finished
+      )
+    }
+  }
+})
+const destroy = destroyImpl.destroy
+Writable.prototype.destroy = function (err, cb) {
+  const state = this._writableState
+
+  // Invoke pending callbacks.
+  if (!state.destroyed && (state.bufferedIndex < state.buffered.length || state[kOnFinished].length)) {
+    process.nextTick(errorBuffer, state)
+  }
+  destroy.call(this, err, cb)
+  return this
+}
+Writable.prototype._undestroy = destroyImpl.undestroy
+Writable.prototype._destroy = function (err, cb) {
+  cb(err)
+}
+Writable.prototype[EE.captureRejectionSymbol] = function (err) {
+  this.destroy(err)
+}
+let webStreamsAdapters
+
+// Lazy to avoid circular references
+function lazyWebStreams() {
+  if (webStreamsAdapters === undefined) webStreamsAdapters = {}
+  return webStreamsAdapters
+}
+Writable.fromWeb = function (writableStream, options) {
+  return lazyWebStreams().newStreamWritableFromWritableStream(writableStream, options)
+}
+Writable.toWeb = function (streamWritable) {
+  return lazyWebStreams().newWritableStreamFromStreamWritable(streamWritable)
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/internal/validators.js b/mqtt-backend/node_modules/readable-stream/lib/internal/validators.js
new file mode 100644
index 0000000..f900684
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/internal/validators.js
@@ -0,0 +1,530 @@
+/* eslint jsdoc/require-jsdoc: "error" */
+
+'use strict'
+
+const {
+  ArrayIsArray,
+  ArrayPrototypeIncludes,
+  ArrayPrototypeJoin,
+  ArrayPrototypeMap,
+  NumberIsInteger,
+  NumberIsNaN,
+  NumberMAX_SAFE_INTEGER,
+  NumberMIN_SAFE_INTEGER,
+  NumberParseInt,
+  ObjectPrototypeHasOwnProperty,
+  RegExpPrototypeExec,
+  String,
+  StringPrototypeToUpperCase,
+  StringPrototypeTrim
+} = require('../ours/primordials')
+const {
+  hideStackFrames,
+  codes: { ERR_SOCKET_BAD_PORT, ERR_INVALID_ARG_TYPE, ERR_INVALID_ARG_VALUE, ERR_OUT_OF_RANGE, ERR_UNKNOWN_SIGNAL }
+} = require('../ours/errors')
+const { normalizeEncoding } = require('../ours/util')
+const { isAsyncFunction, isArrayBufferView } = require('../ours/util').types
+const signals = {}
+
+/**
+ * @param {*} value
+ * @returns {boolean}
+ */
+function isInt32(value) {
+  return value === (value | 0)
+}
+
+/**
+ * @param {*} value
+ * @returns {boolean}
+ */
+function isUint32(value) {
+  return value === value >>> 0
+}
+const octalReg = /^[0-7]+$/
+const modeDesc = 'must be a 32-bit unsigned integer or an octal string'
+
+/**
+ * Parse and validate values that will be converted into mode_t (the S_*
+ * constants). Only valid numbers and octal strings are allowed. They could be
+ * converted to 32-bit unsigned integers or non-negative signed integers in the
+ * C++ land, but any value higher than 0o777 will result in platform-specific
+ * behaviors.
+ * @param {*} value Values to be validated
+ * @param {string} name Name of the argument
+ * @param {number} [def] If specified, will be returned for invalid values
+ * @returns {number}
+ */
+function parseFileMode(value, name, def) {
+  if (typeof value === 'undefined') {
+    value = def
+  }
+  if (typeof value === 'string') {
+    if (RegExpPrototypeExec(octalReg, value) === null) {
+      throw new ERR_INVALID_ARG_VALUE(name, value, modeDesc)
+    }
+    value = NumberParseInt(value, 8)
+  }
+  validateUint32(value, name)
+  return value
+}
+
+/**
+ * @callback validateInteger
+ * @param {*} value
+ * @param {string} name
+ * @param {number} [min]
+ * @param {number} [max]
+ * @returns {asserts value is number}
+ */
+
+/** @type {validateInteger} */
+const validateInteger = hideStackFrames((value, name, min = NumberMIN_SAFE_INTEGER, max = NumberMAX_SAFE_INTEGER) => {
+  if (typeof value !== 'number') throw new ERR_INVALID_ARG_TYPE(name, 'number', value)
+  if (!NumberIsInteger(value)) throw new ERR_OUT_OF_RANGE(name, 'an integer', value)
+  if (value < min || value > max) throw new ERR_OUT_OF_RANGE(name, `>= ${min} && <= ${max}`, value)
+})
+
+/**
+ * @callback validateInt32
+ * @param {*} value
+ * @param {string} name
+ * @param {number} [min]
+ * @param {number} [max]
+ * @returns {asserts value is number}
+ */
+
+/** @type {validateInt32} */
+const validateInt32 = hideStackFrames((value, name, min = -2147483648, max = 2147483647) => {
+  // The defaults for min and max correspond to the limits of 32-bit integers.
+  if (typeof value !== 'number') {
+    throw new ERR_INVALID_ARG_TYPE(name, 'number', value)
+  }
+  if (!NumberIsInteger(value)) {
+    throw new ERR_OUT_OF_RANGE(name, 'an integer', value)
+  }
+  if (value < min || value > max) {
+    throw new ERR_OUT_OF_RANGE(name, `>= ${min} && <= ${max}`, value)
+  }
+})
+
+/**
+ * @callback validateUint32
+ * @param {*} value
+ * @param {string} name
+ * @param {number|boolean} [positive=false]
+ * @returns {asserts value is number}
+ */
+
+/** @type {validateUint32} */
+const validateUint32 = hideStackFrames((value, name, positive = false) => {
+  if (typeof value !== 'number') {
+    throw new ERR_INVALID_ARG_TYPE(name, 'number', value)
+  }
+  if (!NumberIsInteger(value)) {
+    throw new ERR_OUT_OF_RANGE(name, 'an integer', value)
+  }
+  const min = positive ? 1 : 0
+  // 2 ** 32 === 4294967296
+  const max = 4294967295
+  if (value < min || value > max) {
+    throw new ERR_OUT_OF_RANGE(name, `>= ${min} && <= ${max}`, value)
+  }
+})
+
+/**
+ * @callback validateString
+ * @param {*} value
+ * @param {string} name
+ * @returns {asserts value is string}
+ */
+
+/** @type {validateString} */
+function validateString(value, name) {
+  if (typeof value !== 'string') throw new ERR_INVALID_ARG_TYPE(name, 'string', value)
+}
+
+/**
+ * @callback validateNumber
+ * @param {*} value
+ * @param {string} name
+ * @param {number} [min]
+ * @param {number} [max]
+ * @returns {asserts value is number}
+ */
+
+/** @type {validateNumber} */
+function validateNumber(value, name, min = undefined, max) {
+  if (typeof value !== 'number') throw new ERR_INVALID_ARG_TYPE(name, 'number', value)
+  if (
+    (min != null && value < min) ||
+    (max != null && value > max) ||
+    ((min != null || max != null) && NumberIsNaN(value))
+  ) {
+    throw new ERR_OUT_OF_RANGE(
+      name,
+      `${min != null ? `>= ${min}` : ''}${min != null && max != null ? ' && ' : ''}${max != null ? `<= ${max}` : ''}`,
+      value
+    )
+  }
+}
+
+/**
+ * @callback validateOneOf
+ * @template T
+ * @param {T} value
+ * @param {string} name
+ * @param {T[]} oneOf
+ */
+
+/** @type {validateOneOf} */
+const validateOneOf = hideStackFrames((value, name, oneOf) => {
+  if (!ArrayPrototypeIncludes(oneOf, value)) {
+    const allowed = ArrayPrototypeJoin(
+      ArrayPrototypeMap(oneOf, (v) => (typeof v === 'string' ? `'${v}'` : String(v))),
+      ', '
+    )
+    const reason = 'must be one of: ' + allowed
+    throw new ERR_INVALID_ARG_VALUE(name, value, reason)
+  }
+})
+
+/**
+ * @callback validateBoolean
+ * @param {*} value
+ * @param {string} name
+ * @returns {asserts value is boolean}
+ */
+
+/** @type {validateBoolean} */
+function validateBoolean(value, name) {
+  if (typeof value !== 'boolean') throw new ERR_INVALID_ARG_TYPE(name, 'boolean', value)
+}
+
+/**
+ * @param {any} options
+ * @param {string} key
+ * @param {boolean} defaultValue
+ * @returns {boolean}
+ */
+function getOwnPropertyValueOrDefault(options, key, defaultValue) {
+  return options == null || !ObjectPrototypeHasOwnProperty(options, key) ? defaultValue : options[key]
+}
+
+/**
+ * @callback validateObject
+ * @param {*} value
+ * @param {string} name
+ * @param {{
+ *   allowArray?: boolean,
+ *   allowFunction?: boolean,
+ *   nullable?: boolean
+ * }} [options]
+ */
+
+/** @type {validateObject} */
+const validateObject = hideStackFrames((value, name, options = null) => {
+  const allowArray = getOwnPropertyValueOrDefault(options, 'allowArray', false)
+  const allowFunction = getOwnPropertyValueOrDefault(options, 'allowFunction', false)
+  const nullable = getOwnPropertyValueOrDefault(options, 'nullable', false)
+  if (
+    (!nullable && value === null) ||
+    (!allowArray && ArrayIsArray(value)) ||
+    (typeof value !== 'object' && (!allowFunction || typeof value !== 'function'))
+  ) {
+    throw new ERR_INVALID_ARG_TYPE(name, 'Object', value)
+  }
+})
+
+/**
+ * @callback validateDictionary - We are using the Web IDL Standard definition
+ *                                of "dictionary" here, which means any value
+ *                                whose Type is either Undefined, Null, or
+ *                                Object (which includes functions).
+ * @param {*} value
+ * @param {string} name
+ * @see https://webidl.spec.whatwg.org/#es-dictionary
+ * @see https://tc39.es/ecma262/#table-typeof-operator-results
+ */
+
+/** @type {validateDictionary} */
+const validateDictionary = hideStackFrames((value, name) => {
+  if (value != null && typeof value !== 'object' && typeof value !== 'function') {
+    throw new ERR_INVALID_ARG_TYPE(name, 'a dictionary', value)
+  }
+})
+
+/**
+ * @callback validateArray
+ * @param {*} value
+ * @param {string} name
+ * @param {number} [minLength]
+ * @returns {asserts value is any[]}
+ */
+
+/** @type {validateArray} */
+const validateArray = hideStackFrames((value, name, minLength = 0) => {
+  if (!ArrayIsArray(value)) {
+    throw new ERR_INVALID_ARG_TYPE(name, 'Array', value)
+  }
+  if (value.length < minLength) {
+    const reason = `must be longer than ${minLength}`
+    throw new ERR_INVALID_ARG_VALUE(name, value, reason)
+  }
+})
+
+/**
+ * @callback validateStringArray
+ * @param {*} value
+ * @param {string} name
+ * @returns {asserts value is string[]}
+ */
+
+/** @type {validateStringArray} */
+function validateStringArray(value, name) {
+  validateArray(value, name)
+  for (let i = 0; i < value.length; i++) {
+    validateString(value[i], `${name}[${i}]`)
+  }
+}
+
+/**
+ * @callback validateBooleanArray
+ * @param {*} value
+ * @param {string} name
+ * @returns {asserts value is boolean[]}
+ */
+
+/** @type {validateBooleanArray} */
+function validateBooleanArray(value, name) {
+  validateArray(value, name)
+  for (let i = 0; i < value.length; i++) {
+    validateBoolean(value[i], `${name}[${i}]`)
+  }
+}
+
+/**
+ * @callback validateAbortSignalArray
+ * @param {*} value
+ * @param {string} name
+ * @returns {asserts value is AbortSignal[]}
+ */
+
+/** @type {validateAbortSignalArray} */
+function validateAbortSignalArray(value, name) {
+  validateArray(value, name)
+  for (let i = 0; i < value.length; i++) {
+    const signal = value[i]
+    const indexedName = `${name}[${i}]`
+    if (signal == null) {
+      throw new ERR_INVALID_ARG_TYPE(indexedName, 'AbortSignal', signal)
+    }
+    validateAbortSignal(signal, indexedName)
+  }
+}
+
+/**
+ * @param {*} signal
+ * @param {string} [name='signal']
+ * @returns {asserts signal is keyof signals}
+ */
+function validateSignalName(signal, name = 'signal') {
+  validateString(signal, name)
+  if (signals[signal] === undefined) {
+    if (signals[StringPrototypeToUpperCase(signal)] !== undefined) {
+      throw new ERR_UNKNOWN_SIGNAL(signal + ' (signals must use all capital letters)')
+    }
+    throw new ERR_UNKNOWN_SIGNAL(signal)
+  }
+}
+
+/**
+ * @callback validateBuffer
+ * @param {*} buffer
+ * @param {string} [name='buffer']
+ * @returns {asserts buffer is ArrayBufferView}
+ */
+
+/** @type {validateBuffer} */
+const validateBuffer = hideStackFrames((buffer, name = 'buffer') => {
+  if (!isArrayBufferView(buffer)) {
+    throw new ERR_INVALID_ARG_TYPE(name, ['Buffer', 'TypedArray', 'DataView'], buffer)
+  }
+})
+
+/**
+ * @param {string} data
+ * @param {string} encoding
+ */
+function validateEncoding(data, encoding) {
+  const normalizedEncoding = normalizeEncoding(encoding)
+  const length = data.length
+  if (normalizedEncoding === 'hex' && length % 2 !== 0) {
+    throw new ERR_INVALID_ARG_VALUE('encoding', encoding, `is invalid for data of length ${length}`)
+  }
+}
+
+/**
+ * Check that the port number is not NaN when coerced to a number,
+ * is an integer and that it falls within the legal range of port numbers.
+ * @param {*} port
+ * @param {string} [name='Port']
+ * @param {boolean} [allowZero=true]
+ * @returns {number}
+ */
+function validatePort(port, name = 'Port', allowZero = true) {
+  if (
+    (typeof port !== 'number' && typeof port !== 'string') ||
+    (typeof port === 'string' && StringPrototypeTrim(port).length === 0) ||
+    +port !== +port >>> 0 ||
+    port > 0xffff ||
+    (port === 0 && !allowZero)
+  ) {
+    throw new ERR_SOCKET_BAD_PORT(name, port, allowZero)
+  }
+  return port | 0
+}
+
+/**
+ * @callback validateAbortSignal
+ * @param {*} signal
+ * @param {string} name
+ */
+
+/** @type {validateAbortSignal} */
+const validateAbortSignal = hideStackFrames((signal, name) => {
+  if (signal !== undefined && (signal === null || typeof signal !== 'object' || !('aborted' in signal))) {
+    throw new ERR_INVALID_ARG_TYPE(name, 'AbortSignal', signal)
+  }
+})
+
+/**
+ * @callback validateFunction
+ * @param {*} value
+ * @param {string} name
+ * @returns {asserts value is Function}
+ */
+
+/** @type {validateFunction} */
+const validateFunction = hideStackFrames((value, name) => {
+  if (typeof value !== 'function') throw new ERR_INVALID_ARG_TYPE(name, 'Function', value)
+})
+
+/**
+ * @callback validatePlainFunction
+ * @param {*} value
+ * @param {string} name
+ * @returns {asserts value is Function}
+ */
+
+/** @type {validatePlainFunction} */
+const validatePlainFunction = hideStackFrames((value, name) => {
+  if (typeof value !== 'function' || isAsyncFunction(value)) throw new ERR_INVALID_ARG_TYPE(name, 'Function', value)
+})
+
+/**
+ * @callback validateUndefined
+ * @param {*} value
+ * @param {string} name
+ * @returns {asserts value is undefined}
+ */
+
+/** @type {validateUndefined} */
+const validateUndefined = hideStackFrames((value, name) => {
+  if (value !== undefined) throw new ERR_INVALID_ARG_TYPE(name, 'undefined', value)
+})
+
+/**
+ * @template T
+ * @param {T} value
+ * @param {string} name
+ * @param {T[]} union
+ */
+function validateUnion(value, name, union) {
+  if (!ArrayPrototypeIncludes(union, value)) {
+    throw new ERR_INVALID_ARG_TYPE(name, `('${ArrayPrototypeJoin(union, '|')}')`, value)
+  }
+}
+
+/*
+  The rules for the Link header field are described here:
+  https://www.rfc-editor.org/rfc/rfc8288.html#section-3
+
+  This regex validates any string surrounded by angle brackets
+  (not necessarily a valid URI reference) followed by zero or more
+  link-params separated by semicolons.
+*/
+const linkValueRegExp = /^(?:<[^>]*>)(?:\s*;\s*[^;"\s]+(?:=(")?[^;"\s]*\1)?)*$/
+
+/**
+ * @param {any} value
+ * @param {string} name
+ */
+function validateLinkHeaderFormat(value, name) {
+  if (typeof value === 'undefined' || !RegExpPrototypeExec(linkValueRegExp, value)) {
+    throw new ERR_INVALID_ARG_VALUE(
+      name,
+      value,
+      'must be an array or string of format "</styles.css>; rel=preload; as=style"'
+    )
+  }
+}
+
+/**
+ * @param {any} hints
+ * @return {string}
+ */
+function validateLinkHeaderValue(hints) {
+  if (typeof hints === 'string') {
+    validateLinkHeaderFormat(hints, 'hints')
+    return hints
+  } else if (ArrayIsArray(hints)) {
+    const hintsLength = hints.length
+    let result = ''
+    if (hintsLength === 0) {
+      return result
+    }
+    for (let i = 0; i < hintsLength; i++) {
+      const link = hints[i]
+      validateLinkHeaderFormat(link, 'hints')
+      result += link
+      if (i !== hintsLength - 1) {
+        result += ', '
+      }
+    }
+    return result
+  }
+  throw new ERR_INVALID_ARG_VALUE(
+    'hints',
+    hints,
+    'must be an array or string of format "</styles.css>; rel=preload; as=style"'
+  )
+}
+module.exports = {
+  isInt32,
+  isUint32,
+  parseFileMode,
+  validateArray,
+  validateStringArray,
+  validateBooleanArray,
+  validateAbortSignalArray,
+  validateBoolean,
+  validateBuffer,
+  validateDictionary,
+  validateEncoding,
+  validateFunction,
+  validateInt32,
+  validateInteger,
+  validateNumber,
+  validateObject,
+  validateOneOf,
+  validatePlainFunction,
+  validatePort,
+  validateSignalName,
+  validateString,
+  validateUint32,
+  validateUndefined,
+  validateUnion,
+  validateAbortSignal,
+  validateLinkHeaderValue
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/ours/browser.js b/mqtt-backend/node_modules/readable-stream/lib/ours/browser.js
new file mode 100644
index 0000000..39acef3
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/ours/browser.js
@@ -0,0 +1,35 @@
+'use strict'
+
+const CustomStream = require('../stream')
+const promises = require('../stream/promises')
+const originalDestroy = CustomStream.Readable.destroy
+module.exports = CustomStream.Readable
+
+// Explicit export naming is needed for ESM
+module.exports._uint8ArrayToBuffer = CustomStream._uint8ArrayToBuffer
+module.exports._isUint8Array = CustomStream._isUint8Array
+module.exports.isDisturbed = CustomStream.isDisturbed
+module.exports.isErrored = CustomStream.isErrored
+module.exports.isReadable = CustomStream.isReadable
+module.exports.Readable = CustomStream.Readable
+module.exports.Writable = CustomStream.Writable
+module.exports.Duplex = CustomStream.Duplex
+module.exports.Transform = CustomStream.Transform
+module.exports.PassThrough = CustomStream.PassThrough
+module.exports.addAbortSignal = CustomStream.addAbortSignal
+module.exports.finished = CustomStream.finished
+module.exports.destroy = CustomStream.destroy
+module.exports.destroy = originalDestroy
+module.exports.pipeline = CustomStream.pipeline
+module.exports.compose = CustomStream.compose
+Object.defineProperty(CustomStream, 'promises', {
+  configurable: true,
+  enumerable: true,
+  get() {
+    return promises
+  }
+})
+module.exports.Stream = CustomStream.Stream
+
+// Allow default importing
+module.exports.default = module.exports
diff --git a/mqtt-backend/node_modules/readable-stream/lib/ours/errors.js b/mqtt-backend/node_modules/readable-stream/lib/ours/errors.js
new file mode 100644
index 0000000..979957e
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/ours/errors.js
@@ -0,0 +1,343 @@
+'use strict'
+
+const { format, inspect } = require('./util/inspect')
+const { AggregateError: CustomAggregateError } = require('./primordials')
+
+/*
+  This file is a reduced and adapted version of the main lib/internal/errors.js file defined at
+
+  https://github.com/nodejs/node/blob/main/lib/internal/errors.js
+
+  Don't try to replace with the original file and keep it up to date (starting from E(...) definitions)
+  with the upstream file.
+*/
+
+const AggregateError = globalThis.AggregateError || CustomAggregateError
+const kIsNodeError = Symbol('kIsNodeError')
+const kTypes = [
+  'string',
+  'function',
+  'number',
+  'object',
+  // Accept 'Function' and 'Object' as alternative to the lower cased version.
+  'Function',
+  'Object',
+  'boolean',
+  'bigint',
+  'symbol'
+]
+const classRegExp = /^([A-Z][a-z0-9]*)+$/
+const nodeInternalPrefix = '__node_internal_'
+const codes = {}
+function assert(value, message) {
+  if (!value) {
+    throw new codes.ERR_INTERNAL_ASSERTION(message)
+  }
+}
+
+// Only use this for integers! Decimal numbers do not work with this function.
+function addNumericalSeparator(val) {
+  let res = ''
+  let i = val.length
+  const start = val[0] === '-' ? 1 : 0
+  for (; i >= start + 4; i -= 3) {
+    res = `_${val.slice(i - 3, i)}${res}`
+  }
+  return `${val.slice(0, i)}${res}`
+}
+function getMessage(key, msg, args) {
+  if (typeof msg === 'function') {
+    assert(
+      msg.length <= args.length,
+      // Default options do not count.
+      `Code: ${key}; The provided arguments length (${args.length}) does not match the required ones (${msg.length}).`
+    )
+    return msg(...args)
+  }
+  const expectedLength = (msg.match(/%[dfijoOs]/g) || []).length
+  assert(
+    expectedLength === args.length,
+    `Code: ${key}; The provided arguments length (${args.length}) does not match the required ones (${expectedLength}).`
+  )
+  if (args.length === 0) {
+    return msg
+  }
+  return format(msg, ...args)
+}
+function E(code, message, Base) {
+  if (!Base) {
+    Base = Error
+  }
+  class NodeError extends Base {
+    constructor(...args) {
+      super(getMessage(code, message, args))
+    }
+    toString() {
+      return `${this.name} [${code}]: ${this.message}`
+    }
+  }
+  Object.defineProperties(NodeError.prototype, {
+    name: {
+      value: Base.name,
+      writable: true,
+      enumerable: false,
+      configurable: true
+    },
+    toString: {
+      value() {
+        return `${this.name} [${code}]: ${this.message}`
+      },
+      writable: true,
+      enumerable: false,
+      configurable: true
+    }
+  })
+  NodeError.prototype.code = code
+  NodeError.prototype[kIsNodeError] = true
+  codes[code] = NodeError
+}
+function hideStackFrames(fn) {
+  // We rename the functions that will be hidden to cut off the stacktrace
+  // at the outermost one
+  const hidden = nodeInternalPrefix + fn.name
+  Object.defineProperty(fn, 'name', {
+    value: hidden
+  })
+  return fn
+}
+function aggregateTwoErrors(innerError, outerError) {
+  if (innerError && outerError && innerError !== outerError) {
+    if (Array.isArray(outerError.errors)) {
+      // If `outerError` is already an `AggregateError`.
+      outerError.errors.push(innerError)
+      return outerError
+    }
+    const err = new AggregateError([outerError, innerError], outerError.message)
+    err.code = outerError.code
+    return err
+  }
+  return innerError || outerError
+}
+class AbortError extends Error {
+  constructor(message = 'The operation was aborted', options = undefined) {
+    if (options !== undefined && typeof options !== 'object') {
+      throw new codes.ERR_INVALID_ARG_TYPE('options', 'Object', options)
+    }
+    super(message, options)
+    this.code = 'ABORT_ERR'
+    this.name = 'AbortError'
+  }
+}
+E('ERR_ASSERTION', '%s', Error)
+E(
+  'ERR_INVALID_ARG_TYPE',
+  (name, expected, actual) => {
+    assert(typeof name === 'string', "'name' must be a string")
+    if (!Array.isArray(expected)) {
+      expected = [expected]
+    }
+    let msg = 'The '
+    if (name.endsWith(' argument')) {
+      // For cases like 'first argument'
+      msg += `${name} `
+    } else {
+      msg += `"${name}" ${name.includes('.') ? 'property' : 'argument'} `
+    }
+    msg += 'must be '
+    const types = []
+    const instances = []
+    const other = []
+    for (const value of expected) {
+      assert(typeof value === 'string', 'All expected entries have to be of type string')
+      if (kTypes.includes(value)) {
+        types.push(value.toLowerCase())
+      } else if (classRegExp.test(value)) {
+        instances.push(value)
+      } else {
+        assert(value !== 'object', 'The value "object" should be written as "Object"')
+        other.push(value)
+      }
+    }
+
+    // Special handle `object` in case other instances are allowed to outline
+    // the differences between each other.
+    if (instances.length > 0) {
+      const pos = types.indexOf('object')
+      if (pos !== -1) {
+        types.splice(types, pos, 1)
+        instances.push('Object')
+      }
+    }
+    if (types.length > 0) {
+      switch (types.length) {
+        case 1:
+          msg += `of type ${types[0]}`
+          break
+        case 2:
+          msg += `one of type ${types[0]} or ${types[1]}`
+          break
+        default: {
+          const last = types.pop()
+          msg += `one of type ${types.join(', ')}, or ${last}`
+        }
+      }
+      if (instances.length > 0 || other.length > 0) {
+        msg += ' or '
+      }
+    }
+    if (instances.length > 0) {
+      switch (instances.length) {
+        case 1:
+          msg += `an instance of ${instances[0]}`
+          break
+        case 2:
+          msg += `an instance of ${instances[0]} or ${instances[1]}`
+          break
+        default: {
+          const last = instances.pop()
+          msg += `an instance of ${instances.join(', ')}, or ${last}`
+        }
+      }
+      if (other.length > 0) {
+        msg += ' or '
+      }
+    }
+    switch (other.length) {
+      case 0:
+        break
+      case 1:
+        if (other[0].toLowerCase() !== other[0]) {
+          msg += 'an '
+        }
+        msg += `${other[0]}`
+        break
+      case 2:
+        msg += `one of ${other[0]} or ${other[1]}`
+        break
+      default: {
+        const last = other.pop()
+        msg += `one of ${other.join(', ')}, or ${last}`
+      }
+    }
+    if (actual == null) {
+      msg += `. Received ${actual}`
+    } else if (typeof actual === 'function' && actual.name) {
+      msg += `. Received function ${actual.name}`
+    } else if (typeof actual === 'object') {
+      var _actual$constructor
+      if (
+        (_actual$constructor = actual.constructor) !== null &&
+        _actual$constructor !== undefined &&
+        _actual$constructor.name
+      ) {
+        msg += `. Received an instance of ${actual.constructor.name}`
+      } else {
+        const inspected = inspect(actual, {
+          depth: -1
+        })
+        msg += `. Received ${inspected}`
+      }
+    } else {
+      let inspected = inspect(actual, {
+        colors: false
+      })
+      if (inspected.length > 25) {
+        inspected = `${inspected.slice(0, 25)}...`
+      }
+      msg += `. Received type ${typeof actual} (${inspected})`
+    }
+    return msg
+  },
+  TypeError
+)
+E(
+  'ERR_INVALID_ARG_VALUE',
+  (name, value, reason = 'is invalid') => {
+    let inspected = inspect(value)
+    if (inspected.length > 128) {
+      inspected = inspected.slice(0, 128) + '...'
+    }
+    const type = name.includes('.') ? 'property' : 'argument'
+    return `The ${type} '${name}' ${reason}. Received ${inspected}`
+  },
+  TypeError
+)
+E(
+  'ERR_INVALID_RETURN_VALUE',
+  (input, name, value) => {
+    var _value$constructor
+    const type =
+      value !== null &&
+      value !== undefined &&
+      (_value$constructor = value.constructor) !== null &&
+      _value$constructor !== undefined &&
+      _value$constructor.name
+        ? `instance of ${value.constructor.name}`
+        : `type ${typeof value}`
+    return `Expected ${input} to be returned from the "${name}"` + ` function but got ${type}.`
+  },
+  TypeError
+)
+E(
+  'ERR_MISSING_ARGS',
+  (...args) => {
+    assert(args.length > 0, 'At least one arg needs to be specified')
+    let msg
+    const len = args.length
+    args = (Array.isArray(args) ? args : [args]).map((a) => `"${a}"`).join(' or ')
+    switch (len) {
+      case 1:
+        msg += `The ${args[0]} argument`
+        break
+      case 2:
+        msg += `The ${args[0]} and ${args[1]} arguments`
+        break
+      default:
+        {
+          const last = args.pop()
+          msg += `The ${args.join(', ')}, and ${last} arguments`
+        }
+        break
+    }
+    return `${msg} must be specified`
+  },
+  TypeError
+)
+E(
+  'ERR_OUT_OF_RANGE',
+  (str, range, input) => {
+    assert(range, 'Missing "range" argument')
+    let received
+    if (Number.isInteger(input) && Math.abs(input) > 2 ** 32) {
+      received = addNumericalSeparator(String(input))
+    } else if (typeof input === 'bigint') {
+      received = String(input)
+      const limit = BigInt(2) ** BigInt(32)
+      if (input > limit || input < -limit) {
+        received = addNumericalSeparator(received)
+      }
+      received += 'n'
+    } else {
+      received = inspect(input)
+    }
+    return `The value of "${str}" is out of range. It must be ${range}. Received ${received}`
+  },
+  RangeError
+)
+E('ERR_MULTIPLE_CALLBACK', 'Callback called multiple times', Error)
+E('ERR_METHOD_NOT_IMPLEMENTED', 'The %s method is not implemented', Error)
+E('ERR_STREAM_ALREADY_FINISHED', 'Cannot call %s after a stream was finished', Error)
+E('ERR_STREAM_CANNOT_PIPE', 'Cannot pipe, not readable', Error)
+E('ERR_STREAM_DESTROYED', 'Cannot call %s after a stream was destroyed', Error)
+E('ERR_STREAM_NULL_VALUES', 'May not write null values to stream', TypeError)
+E('ERR_STREAM_PREMATURE_CLOSE', 'Premature close', Error)
+E('ERR_STREAM_PUSH_AFTER_EOF', 'stream.push() after EOF', Error)
+E('ERR_STREAM_UNSHIFT_AFTER_END_EVENT', 'stream.unshift() after end event', Error)
+E('ERR_STREAM_WRITE_AFTER_END', 'write after end', Error)
+E('ERR_UNKNOWN_ENCODING', 'Unknown encoding: %s', TypeError)
+module.exports = {
+  AbortError,
+  aggregateTwoErrors: hideStackFrames(aggregateTwoErrors),
+  hideStackFrames,
+  codes
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/ours/index.js b/mqtt-backend/node_modules/readable-stream/lib/ours/index.js
new file mode 100644
index 0000000..6cdd2d7
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/ours/index.js
@@ -0,0 +1,65 @@
+'use strict'
+
+const Stream = require('stream')
+if (Stream && process.env.READABLE_STREAM === 'disable') {
+  const promises = Stream.promises
+
+  // Explicit export naming is needed for ESM
+  module.exports._uint8ArrayToBuffer = Stream._uint8ArrayToBuffer
+  module.exports._isUint8Array = Stream._isUint8Array
+  module.exports.isDisturbed = Stream.isDisturbed
+  module.exports.isErrored = Stream.isErrored
+  module.exports.isReadable = Stream.isReadable
+  module.exports.Readable = Stream.Readable
+  module.exports.Writable = Stream.Writable
+  module.exports.Duplex = Stream.Duplex
+  module.exports.Transform = Stream.Transform
+  module.exports.PassThrough = Stream.PassThrough
+  module.exports.addAbortSignal = Stream.addAbortSignal
+  module.exports.finished = Stream.finished
+  module.exports.destroy = Stream.destroy
+  module.exports.pipeline = Stream.pipeline
+  module.exports.compose = Stream.compose
+  Object.defineProperty(Stream, 'promises', {
+    configurable: true,
+    enumerable: true,
+    get() {
+      return promises
+    }
+  })
+  module.exports.Stream = Stream.Stream
+} else {
+  const CustomStream = require('../stream')
+  const promises = require('../stream/promises')
+  const originalDestroy = CustomStream.Readable.destroy
+  module.exports = CustomStream.Readable
+
+  // Explicit export naming is needed for ESM
+  module.exports._uint8ArrayToBuffer = CustomStream._uint8ArrayToBuffer
+  module.exports._isUint8Array = CustomStream._isUint8Array
+  module.exports.isDisturbed = CustomStream.isDisturbed
+  module.exports.isErrored = CustomStream.isErrored
+  module.exports.isReadable = CustomStream.isReadable
+  module.exports.Readable = CustomStream.Readable
+  module.exports.Writable = CustomStream.Writable
+  module.exports.Duplex = CustomStream.Duplex
+  module.exports.Transform = CustomStream.Transform
+  module.exports.PassThrough = CustomStream.PassThrough
+  module.exports.addAbortSignal = CustomStream.addAbortSignal
+  module.exports.finished = CustomStream.finished
+  module.exports.destroy = CustomStream.destroy
+  module.exports.destroy = originalDestroy
+  module.exports.pipeline = CustomStream.pipeline
+  module.exports.compose = CustomStream.compose
+  Object.defineProperty(CustomStream, 'promises', {
+    configurable: true,
+    enumerable: true,
+    get() {
+      return promises
+    }
+  })
+  module.exports.Stream = CustomStream.Stream
+}
+
+// Allow default importing
+module.exports.default = module.exports
diff --git a/mqtt-backend/node_modules/readable-stream/lib/ours/primordials.js b/mqtt-backend/node_modules/readable-stream/lib/ours/primordials.js
new file mode 100644
index 0000000..81856fc
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/ours/primordials.js
@@ -0,0 +1,124 @@
+'use strict'
+
+/*
+  This file is a reduced and adapted version of the main lib/internal/per_context/primordials.js file defined at
+
+  https://github.com/nodejs/node/blob/main/lib/internal/per_context/primordials.js
+
+  Don't try to replace with the original file and keep it up to date with the upstream file.
+*/
+
+// This is a simplified version of AggregateError
+class AggregateError extends Error {
+  constructor(errors) {
+    if (!Array.isArray(errors)) {
+      throw new TypeError(`Expected input to be an Array, got ${typeof errors}`)
+    }
+    let message = ''
+    for (let i = 0; i < errors.length; i++) {
+      message += `    ${errors[i].stack}\n`
+    }
+    super(message)
+    this.name = 'AggregateError'
+    this.errors = errors
+  }
+}
+module.exports = {
+  AggregateError,
+  ArrayIsArray(self) {
+    return Array.isArray(self)
+  },
+  ArrayPrototypeIncludes(self, el) {
+    return self.includes(el)
+  },
+  ArrayPrototypeIndexOf(self, el) {
+    return self.indexOf(el)
+  },
+  ArrayPrototypeJoin(self, sep) {
+    return self.join(sep)
+  },
+  ArrayPrototypeMap(self, fn) {
+    return self.map(fn)
+  },
+  ArrayPrototypePop(self, el) {
+    return self.pop(el)
+  },
+  ArrayPrototypePush(self, el) {
+    return self.push(el)
+  },
+  ArrayPrototypeSlice(self, start, end) {
+    return self.slice(start, end)
+  },
+  Error,
+  FunctionPrototypeCall(fn, thisArgs, ...args) {
+    return fn.call(thisArgs, ...args)
+  },
+  FunctionPrototypeSymbolHasInstance(self, instance) {
+    return Function.prototype[Symbol.hasInstance].call(self, instance)
+  },
+  MathFloor: Math.floor,
+  Number,
+  NumberIsInteger: Number.isInteger,
+  NumberIsNaN: Number.isNaN,
+  NumberMAX_SAFE_INTEGER: Number.MAX_SAFE_INTEGER,
+  NumberMIN_SAFE_INTEGER: Number.MIN_SAFE_INTEGER,
+  NumberParseInt: Number.parseInt,
+  ObjectDefineProperties(self, props) {
+    return Object.defineProperties(self, props)
+  },
+  ObjectDefineProperty(self, name, prop) {
+    return Object.defineProperty(self, name, prop)
+  },
+  ObjectGetOwnPropertyDescriptor(self, name) {
+    return Object.getOwnPropertyDescriptor(self, name)
+  },
+  ObjectKeys(obj) {
+    return Object.keys(obj)
+  },
+  ObjectSetPrototypeOf(target, proto) {
+    return Object.setPrototypeOf(target, proto)
+  },
+  Promise,
+  PromisePrototypeCatch(self, fn) {
+    return self.catch(fn)
+  },
+  PromisePrototypeThen(self, thenFn, catchFn) {
+    return self.then(thenFn, catchFn)
+  },
+  PromiseReject(err) {
+    return Promise.reject(err)
+  },
+  PromiseResolve(val) {
+    return Promise.resolve(val)
+  },
+  ReflectApply: Reflect.apply,
+  RegExpPrototypeTest(self, value) {
+    return self.test(value)
+  },
+  SafeSet: Set,
+  String,
+  StringPrototypeSlice(self, start, end) {
+    return self.slice(start, end)
+  },
+  StringPrototypeToLowerCase(self) {
+    return self.toLowerCase()
+  },
+  StringPrototypeToUpperCase(self) {
+    return self.toUpperCase()
+  },
+  StringPrototypeTrim(self) {
+    return self.trim()
+  },
+  Symbol,
+  SymbolFor: Symbol.for,
+  SymbolAsyncIterator: Symbol.asyncIterator,
+  SymbolHasInstance: Symbol.hasInstance,
+  SymbolIterator: Symbol.iterator,
+  SymbolDispose: Symbol.dispose || Symbol('Symbol.dispose'),
+  SymbolAsyncDispose: Symbol.asyncDispose || Symbol('Symbol.asyncDispose'),
+  TypedArrayPrototypeSet(self, buf, len) {
+    return self.set(buf, len)
+  },
+  Boolean,
+  Uint8Array
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/ours/util.js b/mqtt-backend/node_modules/readable-stream/lib/ours/util.js
new file mode 100644
index 0000000..b560361
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/ours/util.js
@@ -0,0 +1,148 @@
+'use strict'
+
+const bufferModule = require('buffer')
+const { format, inspect } = require('./util/inspect')
+const {
+  codes: { ERR_INVALID_ARG_TYPE }
+} = require('./errors')
+const { kResistStopPropagation, AggregateError, SymbolDispose } = require('./primordials')
+const AbortSignal = globalThis.AbortSignal || require('abort-controller').AbortSignal
+const AbortController = globalThis.AbortController || require('abort-controller').AbortController
+const AsyncFunction = Object.getPrototypeOf(async function () {}).constructor
+const Blob = globalThis.Blob || bufferModule.Blob
+/* eslint-disable indent */
+const isBlob =
+  typeof Blob !== 'undefined'
+    ? function isBlob(b) {
+        // eslint-disable-next-line indent
+        return b instanceof Blob
+      }
+    : function isBlob(b) {
+        return false
+      }
+/* eslint-enable indent */
+
+const validateAbortSignal = (signal, name) => {
+  if (signal !== undefined && (signal === null || typeof signal !== 'object' || !('aborted' in signal))) {
+    throw new ERR_INVALID_ARG_TYPE(name, 'AbortSignal', signal)
+  }
+}
+const validateFunction = (value, name) => {
+  if (typeof value !== 'function') {
+    throw new ERR_INVALID_ARG_TYPE(name, 'Function', value)
+  }
+}
+module.exports = {
+  AggregateError,
+  kEmptyObject: Object.freeze({}),
+  once(callback) {
+    let called = false
+    return function (...args) {
+      if (called) {
+        return
+      }
+      called = true
+      callback.apply(this, args)
+    }
+  },
+  createDeferredPromise: function () {
+    let resolve
+    let reject
+
+    // eslint-disable-next-line promise/param-names
+    const promise = new Promise((res, rej) => {
+      resolve = res
+      reject = rej
+    })
+    return {
+      promise,
+      resolve,
+      reject
+    }
+  },
+  promisify(fn) {
+    return new Promise((resolve, reject) => {
+      fn((err, ...args) => {
+        if (err) {
+          return reject(err)
+        }
+        return resolve(...args)
+      })
+    })
+  },
+  debuglog() {
+    return function () {}
+  },
+  format,
+  inspect,
+  types: {
+    isAsyncFunction(fn) {
+      return fn instanceof AsyncFunction
+    },
+    isArrayBufferView(arr) {
+      return ArrayBuffer.isView(arr)
+    }
+  },
+  isBlob,
+  deprecate(fn, message) {
+    return fn
+  },
+  addAbortListener:
+    require('events').addAbortListener ||
+    function addAbortListener(signal, listener) {
+      if (signal === undefined) {
+        throw new ERR_INVALID_ARG_TYPE('signal', 'AbortSignal', signal)
+      }
+      validateAbortSignal(signal, 'signal')
+      validateFunction(listener, 'listener')
+      let removeEventListener
+      if (signal.aborted) {
+        queueMicrotask(() => listener())
+      } else {
+        signal.addEventListener('abort', listener, {
+          __proto__: null,
+          once: true,
+          [kResistStopPropagation]: true
+        })
+        removeEventListener = () => {
+          signal.removeEventListener('abort', listener)
+        }
+      }
+      return {
+        __proto__: null,
+        [SymbolDispose]() {
+          var _removeEventListener
+          ;(_removeEventListener = removeEventListener) === null || _removeEventListener === undefined
+            ? undefined
+            : _removeEventListener()
+        }
+      }
+    },
+  AbortSignalAny:
+    AbortSignal.any ||
+    function AbortSignalAny(signals) {
+      // Fast path if there is only one signal.
+      if (signals.length === 1) {
+        return signals[0]
+      }
+      const ac = new AbortController()
+      const abort = () => ac.abort()
+      signals.forEach((signal) => {
+        validateAbortSignal(signal, 'signals')
+        signal.addEventListener('abort', abort, {
+          once: true
+        })
+      })
+      ac.signal.addEventListener(
+        'abort',
+        () => {
+          signals.forEach((signal) => signal.removeEventListener('abort', abort))
+        },
+        {
+          once: true
+        }
+      )
+      return ac.signal
+    }
+}
+module.exports.promisify.custom = Symbol.for('nodejs.util.promisify.custom')
diff --git a/mqtt-backend/node_modules/readable-stream/lib/ours/util/inspect.js b/mqtt-backend/node_modules/readable-stream/lib/ours/util/inspect.js
new file mode 100644
index 0000000..e008445
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/ours/util/inspect.js
@@ -0,0 +1,55 @@
+'use strict'
+
+/*
+  This file is a reduced and adapted version of the main lib/internal/util/inspect.js file defined at
+
+  https://github.com/nodejs/node/blob/main/lib/internal/util/inspect.js
+
+  Don't try to replace with the original file and keep it up to date with the upstream file.
+*/
+module.exports = {
+  format(format, ...args) {
+    // Simplified version of https://nodejs.org/api/util.html#utilformatformat-args
+    return format.replace(/%([sdifj])/g, function (...[_unused, type]) {
+      const replacement = args.shift()
+      if (type === 'f') {
+        return replacement.toFixed(6)
+      } else if (type === 'j') {
+        return JSON.stringify(replacement)
+      } else if (type === 's' && typeof replacement === 'object') {
+        const ctor = replacement.constructor !== Object ? replacement.constructor.name : ''
+        return `${ctor} {}`.trim()
+      } else {
+        return replacement.toString()
+      }
+    })
+  },
+  inspect(value) {
+    // Vastly simplified version of https://nodejs.org/api/util.html#utilinspectobject-options
+    switch (typeof value) {
+      case 'string':
+        if (value.includes("'")) {
+          if (!value.includes('"')) {
+            return `"${value}"`
+          } else if (!value.includes('`') && !value.includes('${')) {
+            return `\`${value}\``
+          }
+        }
+        return `'${value}'`
+      case 'number':
+        if (isNaN(value)) {
+          return 'NaN'
+        } else if (Object.is(value, -0)) {
+          return String(value)
+        }
+        return value
+      case 'bigint':
+        return `${String(value)}n`
+      case 'boolean':
+      case 'undefined':
+        return String(value)
+      case 'object':
+        return '{}'
+    }
+  }
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/stream.js b/mqtt-backend/node_modules/readable-stream/lib/stream.js
new file mode 100644
index 0000000..1e2cab3
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/stream.js
@@ -0,0 +1,143 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict'
+
+/* replacement start */
+
+const { Buffer } = require('buffer')
+
+/* replacement end */
+
+const { ObjectDefineProperty, ObjectKeys, ReflectApply } = require('./ours/primordials')
+const {
+  promisify: { custom: customPromisify }
+} = require('./ours/util')
+const { streamReturningOperators, promiseReturningOperators } = require('./internal/streams/operators')
+const {
+  codes: { ERR_ILLEGAL_CONSTRUCTOR }
+} = require('./ours/errors')
+const compose = require('./internal/streams/compose')
+const { setDefaultHighWaterMark, getDefaultHighWaterMark } = require('./internal/streams/state')
+const { pipeline } = require('./internal/streams/pipeline')
+const { destroyer } = require('./internal/streams/destroy')
+const eos = require('./internal/streams/end-of-stream')
+const internalBuffer = {}
+const promises = require('./stream/promises')
+const utils = require('./internal/streams/utils')
+const Stream = (module.exports = require('./internal/streams/legacy').Stream)
+Stream.isDestroyed = utils.isDestroyed
+Stream.isDisturbed = utils.isDisturbed
+Stream.isErrored = utils.isErrored
+Stream.isReadable = utils.isReadable
+Stream.isWritable = utils.isWritable
+Stream.Readable = require('./internal/streams/readable')
+for (const key of ObjectKeys(streamReturningOperators)) {
+  const op = streamReturningOperators[key]
+  function fn(...args) {
+    if (new.target) {
+      throw ERR_ILLEGAL_CONSTRUCTOR()
+    }
+    return Stream.Readable.from(ReflectApply(op, this, args))
+  }
+  ObjectDefineProperty(fn, 'name', {
+    __proto__: null,
+    value: op.name
+  })
+  ObjectDefineProperty(fn, 'length', {
+    __proto__: null,
+    value: op.length
+  })
+  ObjectDefineProperty(Stream.Readable.prototype, key, {
+    __proto__: null,
+    value: fn,
+    enumerable: false,
+    configurable: true,
+    writable: true
+  })
+}
+for (const key of ObjectKeys(promiseReturningOperators)) {
+  const op = promiseReturningOperators[key]
+  function fn(...args) {
+    if (new.target) {
+      throw ERR_ILLEGAL_CONSTRUCTOR()
+    }
+    return ReflectApply(op, this, args)
+  }
+  ObjectDefineProperty(fn, 'name', {
+    __proto__: null,
+    value: op.name
+  })
+  ObjectDefineProperty(fn, 'length', {
+    __proto__: null,
+    value: op.length
+  })
+  ObjectDefineProperty(Stream.Readable.prototype, key, {
+    __proto__: null,
+    value: fn,
+    enumerable: false,
+    configurable: true,
+    writable: true
+  })
+}
+Stream.Writable = require('./internal/streams/writable')
+Stream.Duplex = require('./internal/streams/duplex')
+Stream.Transform = require('./internal/streams/transform')
+Stream.PassThrough = require('./internal/streams/passthrough')
+Stream.pipeline = pipeline
+const { addAbortSignal } = require('./internal/streams/add-abort-signal')
+Stream.addAbortSignal = addAbortSignal
+Stream.finished = eos
+Stream.destroy = destroyer
+Stream.compose = compose
+Stream.setDefaultHighWaterMark = setDefaultHighWaterMark
+Stream.getDefaultHighWaterMark = getDefaultHighWaterMark
+ObjectDefineProperty(Stream, 'promises', {
+  __proto__: null,
+  configurable: true,
+  enumerable: true,
+  get() {
+    return promises
+  }
+})
+ObjectDefineProperty(pipeline, customPromisify, {
+  __proto__: null,
+  enumerable: true,
+  get() {
+    return promises.pipeline
+  }
+})
+ObjectDefineProperty(eos, customPromisify, {
+  __proto__: null,
+  enumerable: true,
+  get() {
+    return promises.finished
+  }
+})
+
+// Backwards-compat with node 0.4.x
+Stream.Stream = Stream
+Stream._isUint8Array = function isUint8Array(value) {
+  return value instanceof Uint8Array
+}
+Stream._uint8ArrayToBuffer = function _uint8ArrayToBuffer(chunk) {
+  return Buffer.from(chunk.buffer, chunk.byteOffset, chunk.byteLength)
+}
diff --git a/mqtt-backend/node_modules/readable-stream/lib/stream/promises.js b/mqtt-backend/node_modules/readable-stream/lib/stream/promises.js
new file mode 100644
index 0000000..5d4ce15
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/lib/stream/promises.js
@@ -0,0 +1,43 @@
+'use strict'
+
+const { ArrayPrototypePop, Promise } = require('../ours/primordials')
+const { isIterable, isNodeStream, isWebStream } = require('../internal/streams/utils')
+const { pipelineImpl: pl } = require('../internal/streams/pipeline')
+const { finished } = require('../internal/streams/end-of-stream')
+require('../../lib/stream.js')
+function pipeline(...streams) {
+  return new Promise((resolve, reject) => {
+    let signal
+    let end
+    const lastArg = streams[streams.length - 1]
+    if (
+      lastArg &&
+      typeof lastArg === 'object' &&
+      !isNodeStream(lastArg) &&
+      !isIterable(lastArg) &&
+      !isWebStream(lastArg)
+    ) {
+      const options = ArrayPrototypePop(streams)
+      signal = options.signal
+      end = options.end
+    }
+    pl(
+      streams,
+      (err, value) => {
+        if (err) {
+          reject(err)
+        } else {
+          resolve(value)
+        }
+      },
+      {
+        signal,
+        end
+      }
+    )
+  })
+}
+module.exports = {
+  finished,
+  pipeline
+}
diff --git a/mqtt-backend/node_modules/readable-stream/node_modules/buffer/AUTHORS.md b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/AUTHORS.md
new file mode 100644
index 0000000..468aa19
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/AUTHORS.md
@@ -0,0 +1,73 @@
+# Authors
+
+#### Ordered by first contribution.
+
+- Romain Beauxis (toots@rastageeks.org)
+- Tobias Koppers (tobias.koppers@googlemail.com)
+- Janus (ysangkok@gmail.com)
+- Rainer Dreyer (rdrey1@gmail.com)
+- Tõnis Tiigi (tonistiigi@gmail.com)
+- James Halliday (mail@substack.net)
+- Michael Williamson (mike@zwobble.org)
+- elliottcable (github@elliottcable.name)
+- rafael (rvalle@livelens.net)
+- Andrew Kelley (superjoe30@gmail.com)
+- Andreas Madsen (amwebdk@gmail.com)
+- Mike Brevoort (mike.brevoort@pearson.com)
+- Brian White (mscdex@mscdex.net)
+- Feross Aboukhadijeh (feross@feross.org)
+- Ruben Verborgh (ruben@verborgh.org)
+- eliang (eliang.cs@gmail.com)
+- Jesse Tane (jesse.tane@gmail.com)
+- Alfonso Boza (alfonso@cloud.com)
+- Mathias Buus (mathiasbuus@gmail.com)
+- Devon Govett (devongovett@gmail.com)
+- Daniel Cousens (github@dcousens.com)
+- Joseph Dykstra (josephdykstra@gmail.com)
+- Parsha Pourkhomami (parshap+git@gmail.com)
+- Damjan Košir (damjan.kosir@gmail.com)
+- daverayment (dave.rayment@gmail.com)
+- kawanet (u-suke@kawa.net)
+- Linus Unnebäck (linus@folkdatorn.se)
+- Nolan Lawson (nolan.lawson@gmail.com)
+- Calvin Metcalf (calvin.metcalf@gmail.com)
+- Koki Takahashi (hakatasiloving@gmail.com)
+- Guy Bedford (guybedford@gmail.com)
+- Jan Schär (jscissr@gmail.com)
+- RaulTsc (tomescu.raul@gmail.com)
+- Matthieu Monsch (monsch@alum.mit.edu)
+- Dan Ehrenberg (littledan@chromium.org)
+- Kirill Fomichev (fanatid@ya.ru)
+- Yusuke Kawasaki (u-suke@kawa.net)
+- DC (dcposch@dcpos.ch)
+- John-David Dalton (john.david.dalton@gmail.com)
+- adventure-yunfei (adventure030@gmail.com)
+- Emil Bay (github@tixz.dk)
+- Sam Sudar (sudar.sam@gmail.com)
+- Volker Mische (volker.mische@gmail.com)
+- David Walton (support@geekstocks.com)
+- Сковорода Никита Андреевич (chalkerx@gmail.com)
+- greenkeeper[bot] (greenkeeper[bot]@users.noreply.github.com)
+- ukstv (sergey.ukustov@machinomy.com)
+- Renée Kooi (renee@kooi.me)
+- ranbochen (ranbochen@qq.com)
+- Vladimir Borovik (bobahbdb@gmail.com)
+- greenkeeper[bot] (23040076+greenkeeper[bot]@users.noreply.github.com)
+- kumavis (aaron@kumavis.me)
+- Sergey Ukustov (sergey.ukustov@machinomy.com)
+- Fei Liu (liu.feiwood@gmail.com)
+- Blaine Bublitz (blaine.bublitz@gmail.com)
+- clement (clement@seald.io)
+- Koushik Dutta (koushd@gmail.com)
+- Jordan Harband (ljharb@gmail.com)
+- Niklas Mischkulnig (mischnic@users.noreply.github.com)
+- Nikolai Vavilov (vvnicholas@gmail.com)
+- Fedor Nezhivoi (gyzerok@users.noreply.github.com)
+- shuse2 (shus.toda@gmail.com)
+- Peter Newman (peternewman@users.noreply.github.com)
+- mathmakgakpak (44949126+mathmakgakpak@users.noreply.github.com)
+- jkkang (jkkang@smartauth.kr)
+- Deklan Webster (deklanw@gmail.com)
+- Martin Heidegger (martin.heidegger@gmail.com)
+
+#### Generated by bin/update-authors.sh.
diff --git a/mqtt-backend/node_modules/readable-stream/node_modules/buffer/LICENSE b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/LICENSE
new file mode 100644
index 0000000..d6bf75d
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) Feross Aboukhadijeh, and other contributors.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/readable-stream/node_modules/buffer/README.md b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/README.md
new file mode 100644
index 0000000..451e235
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/README.md
@@ -0,0 +1,410 @@
+# buffer [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url] [![javascript style guide][standard-image]][standard-url]
+
+[travis-image]: https://img.shields.io/travis/feross/buffer/master.svg
+[travis-url]: https://travis-ci.org/feross/buffer
+[npm-image]: https://img.shields.io/npm/v/buffer.svg
+[npm-url]: https://npmjs.org/package/buffer
+[downloads-image]: https://img.shields.io/npm/dm/buffer.svg
+[downloads-url]: https://npmjs.org/package/buffer
+[standard-image]: https://img.shields.io/badge/code_style-standard-brightgreen.svg
+[standard-url]: https://standardjs.com
+
+#### The buffer module from [node.js](https://nodejs.org/), for the browser.
+
+[![saucelabs][saucelabs-image]][saucelabs-url]
+
+[saucelabs-image]: https://saucelabs.com/browser-matrix/buffer.svg
+[saucelabs-url]: https://saucelabs.com/u/buffer
+
+With [browserify](http://browserify.org), simply `require('buffer')` or use the `Buffer` global and you will get this module.
+
+The goal is to provide an API that is 100% identical to
+[node's Buffer API](https://nodejs.org/api/buffer.html). Read the
+[official docs](https://nodejs.org/api/buffer.html) for the full list of properties,
+instance methods, and class methods that are supported.
+
+## features
+
+- Manipulate binary data like a boss, in all browsers!
+- Super fast. Backed by Typed Arrays (`Uint8Array`/`ArrayBuffer`, not `Object`)
+- Extremely small bundle size (**6.75KB minified + gzipped**, 51.9KB with comments)
+- Excellent browser support (Chrome, Firefox, Edge, Safari 11+, iOS 11+, Android, etc.)
+- Preserves Node API exactly, with one minor difference (see below)
+- Square-bracket `buf[4]` notation works!
+- Does not modify any browser prototypes or put anything on `window`
+- Comprehensive test suite (including all buffer tests from node.js core)
+
+## install
+
+To use this module directly (without browserify), install it:
+
+```bash
+npm install buffer
+```
+
+This module was previously called **native-buffer-browserify**, but please use **buffer**
+from now on.
+
+If you do not use a bundler, you can use the [standalone script](https://bundle.run/buffer).
+
+## usage
+
+The module's API is identical to node's `Buffer` API. Read the
+[official docs](https://nodejs.org/api/buffer.html) for the full list of properties,
+instance methods, and class methods that are supported.
+
+As mentioned above, `require('buffer')` or use the `Buffer` global with
+[browserify](http://browserify.org) and this module will automatically be included
+in your bundle. Almost any npm module will work in the browser, even if it assumes that
+the node `Buffer` API will be available.
+
+To depend on this module explicitly (without browserify), require it like this:
+
+```js
+var Buffer = require('buffer/').Buffer  // note: the trailing slash is important!
+```
+
+To require this module explicitly, use `require('buffer/')` which tells the node.js module
+lookup algorithm (also used by browserify) to use the **npm module** named `buffer`
+instead of the **node.js core** module named `buffer`!
+
+
+## how does it work?
+
+The Buffer constructor returns instances of `Uint8Array` that have their prototype
+changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of `Uint8Array`,
+so the returned instances will have all the node `Buffer` methods and the
+`Uint8Array` methods. Square bracket notation works as expected -- it returns a
+single octet.
+
+The `Uint8Array` prototype remains unmodified.
+
+
+## tracking the latest node api
+
+This module tracks the Buffer API in the latest (unstable) version of node.js. The Buffer
+API is considered **stable** in the
+[node stability index](https://nodejs.org/docs/latest/api/documentation.html#documentation_stability_index),
+so it is unlikely that there will ever be breaking changes.
+Nonetheless, when/if the Buffer API changes in node, this module's API will change
+accordingly.
+
+## related packages
+
+- [`buffer-reverse`](https://www.npmjs.com/package/buffer-reverse) - Reverse a buffer
+- [`buffer-xor`](https://www.npmjs.com/package/buffer-xor) - Bitwise xor a buffer
+- [`is-buffer`](https://www.npmjs.com/package/is-buffer) - Determine if an object is a Buffer without including the whole `Buffer` package
+
+## conversion packages
+
+### convert typed array to buffer
+
+Use [`typedarray-to-buffer`](https://www.npmjs.com/package/typedarray-to-buffer) to convert any kind of typed array to a `Buffer`. Does not perform a copy, so it's super fast.
+
+### convert buffer to typed array
+
+`Buffer` is a subclass of `Uint8Array` (which is a typed array). So there is no need to explicitly convert to typed array. Just use the buffer as a `Uint8Array`.
+
+### convert blob to buffer
+
+Use [`blob-to-buffer`](https://www.npmjs.com/package/blob-to-buffer) to convert a `Blob` to a `Buffer`.
+
+### convert buffer to blob
+
+To convert a `Buffer` to a `Blob`, use the `Blob` constructor:
+
+```js
+var blob = new Blob([ buffer ])
+```
+
+Optionally, specify a mimetype:
+
+```js
+var blob = new Blob([ buffer ], { type: 'text/html' })
+```
+
+### convert arraybuffer to buffer
+
+To convert an `ArrayBuffer` to a `Buffer`, use the `Buffer.from` function. Does not perform a copy, so it's super fast.
+
+```js
+var buffer = Buffer.from(arrayBuffer)
+```
+
+### convert buffer to arraybuffer
+
+To convert a `Buffer` to an `ArrayBuffer`, use the `.buffer` property (which is present on all `Uint8Array` objects):
+
+```js
+var arrayBuffer = buffer.buffer.slice(
+  buffer.byteOffset, buffer.byteOffset + buffer.byteLength
+)
+```
+
+Alternatively, use the [`to-arraybuffer`](https://www.npmjs.com/package/to-arraybuffer) module.
+
+## performance
+
+See perf tests in `/perf`.
+
+`BrowserBuffer` is the browser `buffer` module (this repo). `Uint8Array` is included as a
+sanity check (since `BrowserBuffer` uses `Uint8Array` under the hood, `Uint8Array` will
+always be at least a bit faster). Finally, `NodeBuffer` is the node.js buffer module,
+which is included to compare against.
+
+NOTE: Performance has improved since these benchmarks were taken. PR welcome to update the README.
+
+### Chrome 38
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 11,457,464 ops/sec | ±0.86% | 66 | ✓ |
+| Uint8Array#bracket-notation | 10,824,332 ops/sec | ±0.74% | 65 | |
+| | | | |
+| BrowserBuffer#concat | 450,532 ops/sec | ±0.76% | 68 | |
+| Uint8Array#concat | 1,368,911 ops/sec | ±1.50% | 62 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 903,001 ops/sec | ±0.96% | 67 | |
+| Uint8Array#copy(16000) | 1,422,441 ops/sec | ±1.04% | 66 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 11,431,358 ops/sec | ±0.46% | 69 | |
+| Uint8Array#copy(16) | 13,944,163 ops/sec | ±1.12% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 106,329 ops/sec | ±6.70% | 44 | |
+| Uint8Array#new(16000) | 131,001 ops/sec | ±2.85% | 31 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,554,491 ops/sec | ±1.60% | 65 | |
+| Uint8Array#new(16) | 6,623,930 ops/sec | ±1.66% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 112,830 ops/sec | ±0.51% | 69 | ✓ |
+| DataView#getFloat64 | 93,500 ops/sec | ±0.57% | 68 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 146,678 ops/sec | ±0.95% | 68 | ✓ |
+| DataView#getFloat32 | 99,311 ops/sec | ±0.41% | 67 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 843,214 ops/sec | ±0.70% | 69 | ✓ |
+| DataView#getUint32 | 103,024 ops/sec | ±0.64% | 67 | |
+| | | | |
+| BrowserBuffer#slice | 1,013,941 ops/sec | ±0.75% | 67 | |
+| Uint8Array#subarray | 1,903,928 ops/sec | ±0.53% | 67 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 61,387 ops/sec | ±0.90% | 67 | |
+| DataView#setFloat32 | 141,249 ops/sec | ±0.40% | 66 | ✓ |
+
+
+### Firefox 33
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 20,800,421 ops/sec | ±1.84% | 60 | |
+| Uint8Array#bracket-notation | 20,826,235 ops/sec | ±2.02% | 61 | ✓ |
+| | | | |
+| BrowserBuffer#concat | 153,076 ops/sec | ±2.32% | 61 | |
+| Uint8Array#concat | 1,255,674 ops/sec | ±8.65% | 52 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,105,312 ops/sec | ±1.16% | 63 | |
+| Uint8Array#copy(16000) | 1,615,911 ops/sec | ±0.55% | 66 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 16,357,599 ops/sec | ±0.73% | 68 | |
+| Uint8Array#copy(16) | 31,436,281 ops/sec | ±1.05% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 52,995 ops/sec | ±6.01% | 35 | |
+| Uint8Array#new(16000) | 87,686 ops/sec | ±5.68% | 45 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 252,031 ops/sec | ±1.61% | 66 | |
+| Uint8Array#new(16) | 8,477,026 ops/sec | ±0.49% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 99,871 ops/sec | ±0.41% | 69 | |
+| DataView#getFloat64 | 285,663 ops/sec | ±0.70% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readFloatBE | 115,540 ops/sec | ±0.42% | 69 | |
+| DataView#getFloat32 | 288,722 ops/sec | ±0.82% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readUInt32LE | 633,926 ops/sec | ±1.08% | 67 | ✓ |
+| DataView#getUint32 | 294,808 ops/sec | ±0.79% | 64 | |
+| | | | |
+| BrowserBuffer#slice | 349,425 ops/sec | ±0.46% | 69 | |
+| Uint8Array#subarray | 5,965,819 ops/sec | ±0.60% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 59,980 ops/sec | ±0.41% | 67 | |
+| DataView#setFloat32 | 317,634 ops/sec | ±0.63% | 68 | ✓ |
+
+### Safari 8
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,279,729 ops/sec | ±2.25% | 56 | ✓ |
+| Uint8Array#bracket-notation | 10,030,767 ops/sec | ±2.23% | 59 | |
+| | | | |
+| BrowserBuffer#concat | 144,138 ops/sec | ±1.38% | 65 | |
+| Uint8Array#concat | 4,950,764 ops/sec | ±1.70% | 63 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,058,548 ops/sec | ±1.51% | 64 | |
+| Uint8Array#copy(16000) | 1,409,666 ops/sec | ±1.17% | 65 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 6,282,529 ops/sec | ±1.88% | 58 | |
+| Uint8Array#copy(16) | 11,907,128 ops/sec | ±2.87% | 58 | ✓ |
+| | | | |
+| BrowserBuffer#new(16000) | 101,663 ops/sec | ±3.89% | 57 | |
+| Uint8Array#new(16000) | 22,050,818 ops/sec | ±6.51% | 46 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 176,072 ops/sec | ±2.13% | 64 | |
+| Uint8Array#new(16) | 24,385,731 ops/sec | ±5.01% | 51 | ✓ |
+| | | | |
+| BrowserBuffer#readDoubleBE | 41,341 ops/sec | ±1.06% | 67 | |
+| DataView#getFloat64 | 322,280 ops/sec | ±0.84% | 68 | ✓ |
+| | | | |
+| BrowserBuffer#readFloatBE | 46,141 ops/sec | ±1.06% | 65 | |
+| DataView#getFloat32 | 337,025 ops/sec | ±0.43% | 69 | ✓ |
+| | | | |
+| BrowserBuffer#readUInt32LE | 151,551 ops/sec | ±1.02% | 66 | |
+| DataView#getUint32 | 308,278 ops/sec | ±0.94% | 67 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 197,365 ops/sec | ±0.95% | 66 | |
+| Uint8Array#subarray | 9,558,024 ops/sec | ±3.08% | 58 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 17,518 ops/sec | ±1.03% | 63 | |
+| DataView#setFloat32 | 319,751 ops/sec | ±0.48% | 68 | ✓ |
+
+
+### Node 0.11.14
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,489,828 ops/sec | ±3.25% | 90 | |
+| Uint8Array#bracket-notation | 10,534,884 ops/sec | ±0.81% | 92 | ✓ |
+| NodeBuffer#bracket-notation | 10,389,910 ops/sec | ±0.97% | 87 | |
+| | | | |
+| BrowserBuffer#concat | 487,830 ops/sec | ±2.58% | 88 | |
+| Uint8Array#concat | 1,814,327 ops/sec | ±1.28% | 88 | ✓ |
+| NodeBuffer#concat | 1,636,523 ops/sec | ±1.88% | 73 | |
+| | | | |
+| BrowserBuffer#copy(16000) | 1,073,665 ops/sec | ±0.77% | 90 | |
+| Uint8Array#copy(16000) | 1,348,517 ops/sec | ±0.84% | 89 | ✓ |
+| NodeBuffer#copy(16000) | 1,289,533 ops/sec | ±0.82% | 93 | |
+| | | | |
+| BrowserBuffer#copy(16) | 12,782,706 ops/sec | ±0.74% | 85 | |
+| Uint8Array#copy(16) | 14,180,427 ops/sec | ±0.93% | 92 | ✓ |
+| NodeBuffer#copy(16) | 11,083,134 ops/sec | ±1.06% | 89 | |
+| | | | |
+| BrowserBuffer#new(16000) | 141,678 ops/sec | ±3.30% | 67 | |
+| Uint8Array#new(16000) | 161,491 ops/sec | ±2.96% | 60 | |
+| NodeBuffer#new(16000) | 292,699 ops/sec | ±3.20% | 55 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,655,466 ops/sec | ±2.41% | 82 | |
+| Uint8Array#new(16) | 14,399,926 ops/sec | ±0.91% | 94 | ✓ |
+| NodeBuffer#new(16) | 3,894,696 ops/sec | ±0.88% | 92 | |
+| | | | |
+| BrowserBuffer#readDoubleBE | 109,582 ops/sec | ±0.75% | 93 | ✓ |
+| DataView#getFloat64 | 91,235 ops/sec | ±0.81% | 90 | |
+| NodeBuffer#readDoubleBE | 88,593 ops/sec | ±0.96% | 81 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 139,854 ops/sec | ±1.03% | 85 | ✓ |
+| DataView#getFloat32 | 98,744 ops/sec | ±0.80% | 89 | |
+| NodeBuffer#readFloatBE | 92,769 ops/sec | ±0.94% | 93 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 710,861 ops/sec | ±0.82% | 92 | |
+| DataView#getUint32 | 117,893 ops/sec | ±0.84% | 91 | |
+| NodeBuffer#readUInt32LE | 851,412 ops/sec | ±0.72% | 93 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 1,673,877 ops/sec | ±0.73% | 94 | |
+| Uint8Array#subarray | 6,919,243 ops/sec | ±0.67% | 90 | ✓ |
+| NodeBuffer#slice | 4,617,604 ops/sec | ±0.79% | 93 | |
+| | | | |
+| BrowserBuffer#writeFloatBE | 66,011 ops/sec | ±0.75% | 93 | |
+| DataView#setFloat32 | 127,760 ops/sec | ±0.72% | 93 | ✓ |
+| NodeBuffer#writeFloatBE | 103,352 ops/sec | ±0.83% | 93 | |
+
+### iojs 1.8.1
+
+| Method | Operations | Accuracy | Sampled | Fastest |
+|:-------|:-----------|:---------|:--------|:-------:|
+| BrowserBuffer#bracket-notation | 10,990,488 ops/sec | ±1.11% | 91 | |
+| Uint8Array#bracket-notation | 11,268,757 ops/sec | ±0.65% | 97 | |
+| NodeBuffer#bracket-notation | 11,353,260 ops/sec | ±0.83% | 94 | ✓ |
+| | | | |
+| BrowserBuffer#concat | 378,954 ops/sec | ±0.74% | 94 | |
+| Uint8Array#concat | 1,358,288 ops/sec | ±0.97% | 87 | |
+| NodeBuffer#concat | 1,934,050 ops/sec | ±1.11% | 78 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16000) | 894,538 ops/sec | ±0.56% | 84 | |
+| Uint8Array#copy(16000) | 1,442,656 ops/sec | ±0.71% | 96 | |
+| NodeBuffer#copy(16000) | 1,457,898 ops/sec | ±0.53% | 92 | ✓ |
+| | | | |
+| BrowserBuffer#copy(16) | 12,870,457 ops/sec | ±0.67% | 95 | |
+| Uint8Array#copy(16) | 16,643,989 ops/sec | ±0.61% | 93 | ✓ |
+| NodeBuffer#copy(16) | 14,885,848 ops/sec | ±0.74% | 94 | |
+| | | | |
+| BrowserBuffer#new(16000) | 109,264 ops/sec | ±4.21% | 63 | |
+| Uint8Array#new(16000) | 138,916 ops/sec | ±1.87% | 61 | |
+| NodeBuffer#new(16000) | 281,449 ops/sec | ±3.58% | 51 | ✓ |
+| | | | |
+| BrowserBuffer#new(16) | 1,362,935 ops/sec | ±0.56% | 99 | |
+| Uint8Array#new(16) | 6,193,090 ops/sec | ±0.64% | 95 | ✓ |
+| NodeBuffer#new(16) | 4,745,425 ops/sec | ±1.56% | 90 | |
+| | | | |
+| BrowserBuffer#readDoubleBE | 118,127 ops/sec | ±0.59% | 93 | ✓ |
+| DataView#getFloat64 | 107,332 ops/sec | ±0.65% | 91 | |
+| NodeBuffer#readDoubleBE | 116,274 ops/sec | ±0.94% | 95 | |
+| | | | |
+| BrowserBuffer#readFloatBE | 150,326 ops/sec | ±0.58% | 95 | ✓ |
+| DataView#getFloat32 | 110,541 ops/sec | ±0.57% | 98 | |
+| NodeBuffer#readFloatBE | 121,599 ops/sec | ±0.60% | 87 | |
+| | | | |
+| BrowserBuffer#readUInt32LE | 814,147 ops/sec | ±0.62% | 93 | |
+| DataView#getUint32 | 137,592 ops/sec | ±0.64% | 90 | |
+| NodeBuffer#readUInt32LE | 931,650 ops/sec | ±0.71% | 96 | ✓ |
+| | | | |
+| BrowserBuffer#slice | 878,590 ops/sec | ±0.68% | 93 | |
+| Uint8Array#subarray | 2,843,308 ops/sec | ±1.02% | 90 | |
+| NodeBuffer#slice | 4,998,316 ops/sec | ±0.68% | 90 | ✓ |
+| | | | |
+| BrowserBuffer#writeFloatBE | 65,927 ops/sec | ±0.74% | 93 | |
+| DataView#setFloat32 | 139,823 ops/sec | ±0.97% | 89 | ✓ |
+| NodeBuffer#writeFloatBE | 135,763 ops/sec | ±0.65% | 96 | |
+| | | | |
+
+## Testing the project
+
+First, install the project:
+
+    npm install
+
+Then, to run tests in Node.js, run:
+
+    npm run test-node
+
+To test locally in a browser, you can run:
+
+    npm run test-browser-es5-local # For ES5 browsers that don't support ES6
+    npm run test-browser-es6-local # For ES6 compliant browsers
+
+This will print out a URL that you can then open in a browser to run the tests, using [airtap](https://www.npmjs.com/package/airtap).
+
+To run automated browser tests using Saucelabs, ensure that your `SAUCE_USERNAME` and `SAUCE_ACCESS_KEY` environment variables are set, then run:
+
+    npm test
+
+This is what's run in Travis, to check against various browsers. The list of browsers is kept in the `bin/airtap-es5.yml` and `bin/airtap-es6.yml` files.
+
+## JavaScript Standard Style
+
+This module uses [JavaScript Standard Style](https://github.com/feross/standard).
+
+[![JavaScript Style Guide](https://cdn.rawgit.com/feross/standard/master/badge.svg)](https://github.com/feross/standard)
+
+To test that the code conforms to the style, `npm install` and run:
+
+    ./node_modules/.bin/standard
+
+## credit
+
+This was originally forked from [buffer-browserify](https://github.com/toots/buffer-browserify).
+
+## Security Policies and Procedures
+
+The `buffer` team and community take all security bugs in `buffer` seriously. Please see our [security policies and procedures](https://github.com/feross/security) document to learn how to report issues.
+
+## license
+
+MIT. Copyright (C) [Feross Aboukhadijeh](http://feross.org), and other contributors. Originally forked from an MIT-licensed module by Romain Beauxis.
diff --git a/mqtt-backend/node_modules/readable-stream/node_modules/buffer/index.d.ts b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/index.d.ts
new file mode 100644
index 0000000..07096a2
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/index.d.ts
@@ -0,0 +1,194 @@
+export class Buffer extends Uint8Array {
+    length: number
+    write(string: string, offset?: number, length?: number, encoding?: string): number;
+    toString(encoding?: string, start?: number, end?: number): string;
+    toJSON(): { type: 'Buffer', data: any[] };
+    equals(otherBuffer: Buffer): boolean;
+    compare(otherBuffer: Uint8Array, targetStart?: number, targetEnd?: number, sourceStart?: number, sourceEnd?: number): number;
+    copy(targetBuffer: Buffer, targetStart?: number, sourceStart?: number, sourceEnd?: number): number;
+    slice(start?: number, end?: number): Buffer;
+    writeUIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeUIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    readUIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readUIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readUInt8(offset: number, noAssert?: boolean): number;
+    readUInt16LE(offset: number, noAssert?: boolean): number;
+    readUInt16BE(offset: number, noAssert?: boolean): number;
+    readUInt32LE(offset: number, noAssert?: boolean): number;
+    readUInt32BE(offset: number, noAssert?: boolean): number;
+    readBigUInt64LE(offset: number): BigInt;
+    readBigUInt64BE(offset: number): BigInt;
+    readInt8(offset: number, noAssert?: boolean): number;
+    readInt16LE(offset: number, noAssert?: boolean): number;
+    readInt16BE(offset: number, noAssert?: boolean): number;
+    readInt32LE(offset: number, noAssert?: boolean): number;
+    readInt32BE(offset: number, noAssert?: boolean): number;
+    readBigInt64LE(offset: number): BigInt;
+    readBigInt64BE(offset: number): BigInt;
+    readFloatLE(offset: number, noAssert?: boolean): number;
+    readFloatBE(offset: number, noAssert?: boolean): number;
+    readDoubleLE(offset: number, noAssert?: boolean): number;
+    readDoubleBE(offset: number, noAssert?: boolean): number;
+    reverse(): this;
+    swap16(): Buffer;
+    swap32(): Buffer;
+    swap64(): Buffer;
+    writeUInt8(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt16LE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt16BE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt32LE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt32BE(value: number, offset: number, noAssert?: boolean): number;
+    writeBigUInt64LE(value: number, offset: number): BigInt;
+    writeBigUInt64BE(value: number, offset: number): BigInt;
+    writeInt8(value: number, offset: number, noAssert?: boolean): number;
+    writeInt16LE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt16BE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt32LE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt32BE(value: number, offset: number, noAssert?: boolean): number;
+    writeBigInt64LE(value: number, offset: number): BigInt;
+    writeBigInt64BE(value: number, offset: number): BigInt;
+    writeFloatLE(value: number, offset: number, noAssert?: boolean): number;
+    writeFloatBE(value: number, offset: number, noAssert?: boolean): number;
+    writeDoubleLE(value: number, offset: number, noAssert?: boolean): number;
+    writeDoubleBE(value: number, offset: number, noAssert?: boolean): number;
+    fill(value: any, offset?: number, end?: number): this;
+    indexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+    lastIndexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+    includes(value: string | number | Buffer, byteOffset?: number, encoding?: string): boolean;
+
+    /**
+     * Allocates a new buffer containing the given {str}.
+     *
+     * @param str String to store in buffer.
+     * @param encoding encoding to use, optional.  Default is 'utf8'
+     */
+    constructor (str: string, encoding?: string);
+    /**
+     * Allocates a new buffer of {size} octets.
+     *
+     * @param size count of octets to allocate.
+     */
+    constructor (size: number);
+    /**
+     * Allocates a new buffer containing the given {array} of octets.
+     *
+     * @param array The octets to store.
+     */
+    constructor (array: Uint8Array);
+    /**
+     * Produces a Buffer backed by the same allocated memory as
+     * the given {ArrayBuffer}.
+     *
+     *
+     * @param arrayBuffer The ArrayBuffer with which to share memory.
+     */
+    constructor (arrayBuffer: ArrayBuffer);
+    /**
+     * Allocates a new buffer containing the given {array} of octets.
+     *
+     * @param array The octets to store.
+     */
+    constructor (array: any[]);
+    /**
+     * Copies the passed {buffer} data onto a new {Buffer} instance.
+     *
+     * @param buffer The buffer to copy.
+     */
+    constructor (buffer: Buffer);
+    prototype: Buffer;
+    /**
+     * Allocates a new Buffer using an {array} of octets.
+     *
+     * @param array
+     */
+    static from(array: any[]): Buffer;
+    /**
+     * When passed a reference to the .buffer property of a TypedArray instance,
+     * the newly created Buffer will share the same allocated memory as the TypedArray.
+     * The optional {byteOffset} and {length} arguments specify a memory range
+     * within the {arrayBuffer} that will be shared by the Buffer.
+     *
+     * @param arrayBuffer The .buffer property of a TypedArray or a new ArrayBuffer()
+     * @param byteOffset
+     * @param length
+     */
+    static from(arrayBuffer: ArrayBuffer, byteOffset?: number, length?: number): Buffer;
+    /**
+     * Copies the passed {buffer} data onto a new Buffer instance.
+     *
+     * @param buffer
+     */
+    static from(buffer: Buffer | Uint8Array): Buffer;
+    /**
+     * Creates a new Buffer containing the given JavaScript string {str}.
+     * If provided, the {encoding} parameter identifies the character encoding.
+     * If not provided, {encoding} defaults to 'utf8'.
+     *
+     * @param str
+     */
+    static from(str: string, encoding?: string): Buffer;
+    /**
+     * Returns true if {obj} is a Buffer
+     *
+     * @param obj object to test.
+     */
+    static isBuffer(obj: any): obj is Buffer;
+    /**
+     * Returns true if {encoding} is a valid encoding argument.
+     * Valid string encodings in Node 0.12: 'ascii'|'utf8'|'utf16le'|'ucs2'(alias of 'utf16le')|'base64'|'binary'(deprecated)|'hex'
+     *
+     * @param encoding string to test.
+     */
+    static isEncoding(encoding: string): boolean;
+    /**
+     * Gives the actual byte length of a string. encoding defaults to 'utf8'.
+     * This is not the same as String.prototype.length since that returns the number of characters in a string.
+     *
+     * @param string string to test.
+     * @param encoding encoding used to evaluate (defaults to 'utf8')
+     */
+    static byteLength(string: string, encoding?: string): number;
+    /**
+     * Returns a buffer which is the result of concatenating all the buffers in the list together.
+     *
+     * If the list has no items, or if the totalLength is 0, then it returns a zero-length buffer.
+     * If the list has exactly one item, then the first item of the list is returned.
+     * If the list has more than one item, then a new Buffer is created.
+     *
+     * @param list An array of Buffer objects to concatenate
+     * @param totalLength Total length of the buffers when concatenated.
+     *   If totalLength is not provided, it is read from the buffers in the list. However, this adds an additional loop to the function, so it is faster to provide the length explicitly.
+     */
+    static concat(list: Uint8Array[], totalLength?: number): Buffer;
+    /**
+     * The same as buf1.compare(buf2).
+     */
+    static compare(buf1: Uint8Array, buf2: Uint8Array): number;
+    /**
+     * Allocates a new buffer of {size} octets.
+     *
+     * @param size count of octets to allocate.
+     * @param fill if specified, buffer will be initialized by calling buf.fill(fill).
+     *    If parameter is omitted, buffer will be filled with zeros.
+     * @param encoding encoding used for call to buf.fill while initializing
+     */
+    static alloc(size: number, fill?: string | Buffer | number, encoding?: string): Buffer;
+    /**
+     * Allocates a new buffer of {size} octets, leaving memory not initialized, so the contents
+     * of the newly created Buffer are unknown and may contain sensitive data.
+     *
+     * @param size count of octets to allocate
+     */
+    static allocUnsafe(size: number): Buffer;
+    /**
+     * Allocates a new non-pooled buffer of {size} octets, leaving memory not initialized, so the contents
+     * of the newly created Buffer are unknown and may contain sensitive data.
+     *
+     * @param size count of octets to allocate
+     */
+    static allocUnsafeSlow(size: number): Buffer;
+}
diff --git a/mqtt-backend/node_modules/readable-stream/node_modules/buffer/index.js b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/index.js
new file mode 100644
index 0000000..7a0e9c2
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/index.js
@@ -0,0 +1,2106 @@
+/*!
+ * The buffer module from node.js, for the browser.
+ *
+ * @author   Feross Aboukhadijeh <https://feross.org>
+ * @license  MIT
+ */
+/* eslint-disable no-proto */
+
+'use strict'
+
+const base64 = require('base64-js')
+const ieee754 = require('ieee754')
+const customInspectSymbol =
+  (typeof Symbol === 'function' && typeof Symbol['for'] === 'function') // eslint-disable-line dot-notation
+    ? Symbol['for']('nodejs.util.inspect.custom') // eslint-disable-line dot-notation
+    : null
+
+exports.Buffer = Buffer
+exports.SlowBuffer = SlowBuffer
+exports.INSPECT_MAX_BYTES = 50
+
+const K_MAX_LENGTH = 0x7fffffff
+exports.kMaxLength = K_MAX_LENGTH
+
+/**
+ * If `Buffer.TYPED_ARRAY_SUPPORT`:
+ *   === true    Use Uint8Array implementation (fastest)
+ *   === false   Print warning and recommend using `buffer` v4.x which has an Object
+ *               implementation (most compatible, even IE6)
+ *
+ * Browsers that support typed arrays are IE 10+, Firefox 4+, Chrome 7+, Safari 5.1+,
+ * Opera 11.6+, iOS 4.2+.
+ *
+ * We report that the browser does not support typed arrays if the are not subclassable
+ * using __proto__. Firefox 4-29 lacks support for adding new properties to `Uint8Array`
+ * (See: https://bugzilla.mozilla.org/show_bug.cgi?id=695438). IE 10 lacks support
+ * for __proto__ and has a buggy typed array implementation.
+ */
+Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport()
+
+if (!Buffer.TYPED_ARRAY_SUPPORT && typeof console !== 'undefined' &&
+    typeof console.error === 'function') {
+  console.error(
+    'This browser lacks typed array (Uint8Array) support which is required by ' +
+    '`buffer` v5.x. Use `buffer` v4.x if you require old browser support.'
+  )
+}
+
+function typedArraySupport () {
+  // Can typed array instances can be augmented?
+  try {
+    const arr = new Uint8Array(1)
+    const proto = { foo: function () { return 42 } }
+    Object.setPrototypeOf(proto, Uint8Array.prototype)
+    Object.setPrototypeOf(arr, proto)
+    return arr.foo() === 42
+  } catch (e) {
+    return false
+  }
+}
+
+Object.defineProperty(Buffer.prototype, 'parent', {
+  enumerable: true,
+  get: function () {
+    if (!Buffer.isBuffer(this)) return undefined
+    return this.buffer
+  }
+})
+
+Object.defineProperty(Buffer.prototype, 'offset', {
+  enumerable: true,
+  get: function () {
+    if (!Buffer.isBuffer(this)) return undefined
+    return this.byteOffset
+  }
+})
+
+function createBuffer (length) {
+  if (length > K_MAX_LENGTH) {
+    throw new RangeError('The value "' + length + '" is invalid for option "size"')
+  }
+  // Return an augmented `Uint8Array` instance
+  const buf = new Uint8Array(length)
+  Object.setPrototypeOf(buf, Buffer.prototype)
+  return buf
+}
+
+/**
+ * The Buffer constructor returns instances of `Uint8Array` that have their
+ * prototype changed to `Buffer.prototype`. Furthermore, `Buffer` is a subclass of
+ * `Uint8Array`, so the returned instances will have all the node `Buffer` methods
+ * and the `Uint8Array` methods. Square bracket notation works as expected -- it
+ * returns a single octet.
+ *
+ * The `Uint8Array` prototype remains unmodified.
+ */
+
+function Buffer (arg, encodingOrOffset, length) {
+  // Common case.
+  if (typeof arg === 'number') {
+    if (typeof encodingOrOffset === 'string') {
+      throw new TypeError(
+        'The "string" argument must be of type string. Received type number'
+      )
+    }
+    return allocUnsafe(arg)
+  }
+  return from(arg, encodingOrOffset, length)
+}
+
+Buffer.poolSize = 8192 // not used by this implementation
+
+function from (value, encodingOrOffset, length) {
+  if (typeof value === 'string') {
+    return fromString(value, encodingOrOffset)
+  }
+
+  if (ArrayBuffer.isView(value)) {
+    return fromArrayView(value)
+  }
+
+  if (value == null) {
+    throw new TypeError(
+      'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
+      'or Array-like Object. Received type ' + (typeof value)
+    )
+  }
+
+  if (isInstance(value, ArrayBuffer) ||
+      (value && isInstance(value.buffer, ArrayBuffer))) {
+    return fromArrayBuffer(value, encodingOrOffset, length)
+  }
+
+  if (typeof SharedArrayBuffer !== 'undefined' &&
+      (isInstance(value, SharedArrayBuffer) ||
+      (value && isInstance(value.buffer, SharedArrayBuffer)))) {
+    return fromArrayBuffer(value, encodingOrOffset, length)
+  }
+
+  if (typeof value === 'number') {
+    throw new TypeError(
+      'The "value" argument must not be of type number. Received type number'
+    )
+  }
+
+  const valueOf = value.valueOf && value.valueOf()
+  if (valueOf != null && valueOf !== value) {
+    return Buffer.from(valueOf, encodingOrOffset, length)
+  }
+
+  const b = fromObject(value)
+  if (b) return b
+
+  if (typeof Symbol !== 'undefined' && Symbol.toPrimitive != null &&
+      typeof value[Symbol.toPrimitive] === 'function') {
+    return Buffer.from(value[Symbol.toPrimitive]('string'), encodingOrOffset, length)
+  }
+
+  throw new TypeError(
+    'The first argument must be one of type string, Buffer, ArrayBuffer, Array, ' +
+    'or Array-like Object. Received type ' + (typeof value)
+  )
+}
+
+/**
+ * Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
+ * if value is a number.
+ * Buffer.from(str[, encoding])
+ * Buffer.from(array)
+ * Buffer.from(buffer)
+ * Buffer.from(arrayBuffer[, byteOffset[, length]])
+ **/
+Buffer.from = function (value, encodingOrOffset, length) {
+  return from(value, encodingOrOffset, length)
+}
+
+// Note: Change prototype *after* Buffer.from is defined to workaround Chrome bug:
+// https://github.com/feross/buffer/pull/148
+Object.setPrototypeOf(Buffer.prototype, Uint8Array.prototype)
+Object.setPrototypeOf(Buffer, Uint8Array)
+
+function assertSize (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('"size" argument must be of type number')
+  } else if (size < 0) {
+    throw new RangeError('The value "' + size + '" is invalid for option "size"')
+  }
+}
+
+function alloc (size, fill, encoding) {
+  assertSize(size)
+  if (size <= 0) {
+    return createBuffer(size)
+  }
+  if (fill !== undefined) {
+    // Only pay attention to encoding if it's a string. This
+    // prevents accidentally sending in a number that would
+    // be interpreted as a start offset.
+    return typeof encoding === 'string'
+      ? createBuffer(size).fill(fill, encoding)
+      : createBuffer(size).fill(fill)
+  }
+  return createBuffer(size)
+}
+
+/**
+ * Creates a new filled Buffer instance.
+ * alloc(size[, fill[, encoding]])
+ **/
+Buffer.alloc = function (size, fill, encoding) {
+  return alloc(size, fill, encoding)
+}
+
+function allocUnsafe (size) {
+  assertSize(size)
+  return createBuffer(size < 0 ? 0 : checked(size) | 0)
+}
+
+/**
+ * Equivalent to Buffer(num), by default creates a non-zero-filled Buffer instance.
+ * */
+Buffer.allocUnsafe = function (size) {
+  return allocUnsafe(size)
+}
+/**
+ * Equivalent to SlowBuffer(num), by default creates a non-zero-filled Buffer instance.
+ */
+Buffer.allocUnsafeSlow = function (size) {
+  return allocUnsafe(size)
+}
+
+function fromString (string, encoding) {
+  if (typeof encoding !== 'string' || encoding === '') {
+    encoding = 'utf8'
+  }
+
+  if (!Buffer.isEncoding(encoding)) {
+    throw new TypeError('Unknown encoding: ' + encoding)
+  }
+
+  const length = byteLength(string, encoding) | 0
+  let buf = createBuffer(length)
+
+  const actual = buf.write(string, encoding)
+
+  if (actual !== length) {
+    // Writing a hex string, for example, that contains invalid characters will
+    // cause everything after the first invalid character to be ignored. (e.g.
+    // 'abxxcd' will be treated as 'ab')
+    buf = buf.slice(0, actual)
+  }
+
+  return buf
+}
+
+function fromArrayLike (array) {
+  const length = array.length < 0 ? 0 : checked(array.length) | 0
+  const buf = createBuffer(length)
+  for (let i = 0; i < length; i += 1) {
+    buf[i] = array[i] & 255
+  }
+  return buf
+}
+
+function fromArrayView (arrayView) {
+  if (isInstance(arrayView, Uint8Array)) {
+    const copy = new Uint8Array(arrayView)
+    return fromArrayBuffer(copy.buffer, copy.byteOffset, copy.byteLength)
+  }
+  return fromArrayLike(arrayView)
+}
+
+function fromArrayBuffer (array, byteOffset, length) {
+  if (byteOffset < 0 || array.byteLength < byteOffset) {
+    throw new RangeError('"offset" is outside of buffer bounds')
+  }
+
+  if (array.byteLength < byteOffset + (length || 0)) {
+    throw new RangeError('"length" is outside of buffer bounds')
+  }
+
+  let buf
+  if (byteOffset === undefined && length === undefined) {
+    buf = new Uint8Array(array)
+  } else if (length === undefined) {
+    buf = new Uint8Array(array, byteOffset)
+  } else {
+    buf = new Uint8Array(array, byteOffset, length)
+  }
+
+  // Return an augmented `Uint8Array` instance
+  Object.setPrototypeOf(buf, Buffer.prototype)
+
+  return buf
+}
+
+function fromObject (obj) {
+  if (Buffer.isBuffer(obj)) {
+    const len = checked(obj.length) | 0
+    const buf = createBuffer(len)
+
+    if (buf.length === 0) {
+      return buf
+    }
+
+    obj.copy(buf, 0, 0, len)
+    return buf
+  }
+
+  if (obj.length !== undefined) {
+    if (typeof obj.length !== 'number' || numberIsNaN(obj.length)) {
+      return createBuffer(0)
+    }
+    return fromArrayLike(obj)
+  }
+
+  if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
+    return fromArrayLike(obj.data)
+  }
+}
+
+function checked (length) {
+  // Note: cannot use `length < K_MAX_LENGTH` here because that fails when
+  // length is NaN (which is otherwise coerced to zero.)
+  if (length >= K_MAX_LENGTH) {
+    throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
+                         'size: 0x' + K_MAX_LENGTH.toString(16) + ' bytes')
+  }
+  return length | 0
+}
+
+function SlowBuffer (length) {
+  if (+length != length) { // eslint-disable-line eqeqeq
+    length = 0
+  }
+  return Buffer.alloc(+length)
+}
+
+Buffer.isBuffer = function isBuffer (b) {
+  return b != null && b._isBuffer === true &&
+    b !== Buffer.prototype // so Buffer.isBuffer(Buffer.prototype) will be false
+}
+
+Buffer.compare = function compare (a, b) {
+  if (isInstance(a, Uint8Array)) a = Buffer.from(a, a.offset, a.byteLength)
+  if (isInstance(b, Uint8Array)) b = Buffer.from(b, b.offset, b.byteLength)
+  if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
+    throw new TypeError(
+      'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
+    )
+  }
+
+  if (a === b) return 0
+
+  let x = a.length
+  let y = b.length
+
+  for (let i = 0, len = Math.min(x, y); i < len; ++i) {
+    if (a[i] !== b[i]) {
+      x = a[i]
+      y = b[i]
+      break
+    }
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
+}
+
+Buffer.isEncoding = function isEncoding (encoding) {
+  switch (String(encoding).toLowerCase()) {
+    case 'hex':
+    case 'utf8':
+    case 'utf-8':
+    case 'ascii':
+    case 'latin1':
+    case 'binary':
+    case 'base64':
+    case 'ucs2':
+    case 'ucs-2':
+    case 'utf16le':
+    case 'utf-16le':
+      return true
+    default:
+      return false
+  }
+}
+
+Buffer.concat = function concat (list, length) {
+  if (!Array.isArray(list)) {
+    throw new TypeError('"list" argument must be an Array of Buffers')
+  }
+
+  if (list.length === 0) {
+    return Buffer.alloc(0)
+  }
+
+  let i
+  if (length === undefined) {
+    length = 0
+    for (i = 0; i < list.length; ++i) {
+      length += list[i].length
+    }
+  }
+
+  const buffer = Buffer.allocUnsafe(length)
+  let pos = 0
+  for (i = 0; i < list.length; ++i) {
+    let buf = list[i]
+    if (isInstance(buf, Uint8Array)) {
+      if (pos + buf.length > buffer.length) {
+        if (!Buffer.isBuffer(buf)) buf = Buffer.from(buf)
+        buf.copy(buffer, pos)
+      } else {
+        Uint8Array.prototype.set.call(
+          buffer,
+          buf,
+          pos
+        )
+      }
+    } else if (!Buffer.isBuffer(buf)) {
+      throw new TypeError('"list" argument must be an Array of Buffers')
+    } else {
+      buf.copy(buffer, pos)
+    }
+    pos += buf.length
+  }
+  return buffer
+}
+
+function byteLength (string, encoding) {
+  if (Buffer.isBuffer(string)) {
+    return string.length
+  }
+  if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
+    return string.byteLength
+  }
+  if (typeof string !== 'string') {
+    throw new TypeError(
+      'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
+      'Received type ' + typeof string
+    )
+  }
+
+  const len = string.length
+  const mustMatch = (arguments.length > 2 && arguments[2] === true)
+  if (!mustMatch && len === 0) return 0
+
+  // Use a for loop to avoid recursion
+  let loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'ascii':
+      case 'latin1':
+      case 'binary':
+        return len
+      case 'utf8':
+      case 'utf-8':
+        return utf8ToBytes(string).length
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return len * 2
+      case 'hex':
+        return len >>> 1
+      case 'base64':
+        return base64ToBytes(string).length
+      default:
+        if (loweredCase) {
+          return mustMatch ? -1 : utf8ToBytes(string).length // assume utf8
+        }
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+Buffer.byteLength = byteLength
+
+function slowToString (encoding, start, end) {
+  let loweredCase = false
+
+  // No need to verify that "this.length <= MAX_UINT32" since it's a read-only
+  // property of a typed array.
+
+  // This behaves neither like String nor Uint8Array in that we set start/end
+  // to their upper/lower bounds if the value passed is out of range.
+  // undefined is handled specially as per ECMA-262 6th Edition,
+  // Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
+  if (start === undefined || start < 0) {
+    start = 0
+  }
+  // Return early if start > this.length. Done here to prevent potential uint32
+  // coercion fail below.
+  if (start > this.length) {
+    return ''
+  }
+
+  if (end === undefined || end > this.length) {
+    end = this.length
+  }
+
+  if (end <= 0) {
+    return ''
+  }
+
+  // Force coercion to uint32. This will also coerce falsey/NaN values to 0.
+  end >>>= 0
+  start >>>= 0
+
+  if (end <= start) {
+    return ''
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  while (true) {
+    switch (encoding) {
+      case 'hex':
+        return hexSlice(this, start, end)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Slice(this, start, end)
+
+      case 'ascii':
+        return asciiSlice(this, start, end)
+
+      case 'latin1':
+      case 'binary':
+        return latin1Slice(this, start, end)
+
+      case 'base64':
+        return base64Slice(this, start, end)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return utf16leSlice(this, start, end)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = (encoding + '').toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+// This property is used by `Buffer.isBuffer` (and the `is-buffer` npm package)
+// to detect a Buffer instance. It's not possible to use `instanceof Buffer`
+// reliably in a browserify context because there could be multiple different
+// copies of the 'buffer' package in use. This method works even for Buffer
+// instances that were created from another copy of the `buffer` package.
+// See: https://github.com/feross/buffer/issues/154
+Buffer.prototype._isBuffer = true
+
+function swap (b, n, m) {
+  const i = b[n]
+  b[n] = b[m]
+  b[m] = i
+}
+
+Buffer.prototype.swap16 = function swap16 () {
+  const len = this.length
+  if (len % 2 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 16-bits')
+  }
+  for (let i = 0; i < len; i += 2) {
+    swap(this, i, i + 1)
+  }
+  return this
+}
+
+Buffer.prototype.swap32 = function swap32 () {
+  const len = this.length
+  if (len % 4 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 32-bits')
+  }
+  for (let i = 0; i < len; i += 4) {
+    swap(this, i, i + 3)
+    swap(this, i + 1, i + 2)
+  }
+  return this
+}
+
+Buffer.prototype.swap64 = function swap64 () {
+  const len = this.length
+  if (len % 8 !== 0) {
+    throw new RangeError('Buffer size must be a multiple of 64-bits')
+  }
+  for (let i = 0; i < len; i += 8) {
+    swap(this, i, i + 7)
+    swap(this, i + 1, i + 6)
+    swap(this, i + 2, i + 5)
+    swap(this, i + 3, i + 4)
+  }
+  return this
+}
+
+Buffer.prototype.toString = function toString () {
+  const length = this.length
+  if (length === 0) return ''
+  if (arguments.length === 0) return utf8Slice(this, 0, length)
+  return slowToString.apply(this, arguments)
+}
+
+Buffer.prototype.toLocaleString = Buffer.prototype.toString
+
+Buffer.prototype.equals = function equals (b) {
+  if (!Buffer.isBuffer(b)) throw new TypeError('Argument must be a Buffer')
+  if (this === b) return true
+  return Buffer.compare(this, b) === 0
+}
+
+Buffer.prototype.inspect = function inspect () {
+  let str = ''
+  const max = exports.INSPECT_MAX_BYTES
+  str = this.toString('hex', 0, max).replace(/(.{2})/g, '$1 ').trim()
+  if (this.length > max) str += ' ... '
+  return '<Buffer ' + str + '>'
+}
+if (customInspectSymbol) {
+  Buffer.prototype[customInspectSymbol] = Buffer.prototype.inspect
+}
+
+Buffer.prototype.compare = function compare (target, start, end, thisStart, thisEnd) {
+  if (isInstance(target, Uint8Array)) {
+    target = Buffer.from(target, target.offset, target.byteLength)
+  }
+  if (!Buffer.isBuffer(target)) {
+    throw new TypeError(
+      'The "target" argument must be one of type Buffer or Uint8Array. ' +
+      'Received type ' + (typeof target)
+    )
+  }
+
+  if (start === undefined) {
+    start = 0
+  }
+  if (end === undefined) {
+    end = target ? target.length : 0
+  }
+  if (thisStart === undefined) {
+    thisStart = 0
+  }
+  if (thisEnd === undefined) {
+    thisEnd = this.length
+  }
+
+  if (start < 0 || end > target.length || thisStart < 0 || thisEnd > this.length) {
+    throw new RangeError('out of range index')
+  }
+
+  if (thisStart >= thisEnd && start >= end) {
+    return 0
+  }
+  if (thisStart >= thisEnd) {
+    return -1
+  }
+  if (start >= end) {
+    return 1
+  }
+
+  start >>>= 0
+  end >>>= 0
+  thisStart >>>= 0
+  thisEnd >>>= 0
+
+  if (this === target) return 0
+
+  let x = thisEnd - thisStart
+  let y = end - start
+  const len = Math.min(x, y)
+
+  const thisCopy = this.slice(thisStart, thisEnd)
+  const targetCopy = target.slice(start, end)
+
+  for (let i = 0; i < len; ++i) {
+    if (thisCopy[i] !== targetCopy[i]) {
+      x = thisCopy[i]
+      y = targetCopy[i]
+      break
+    }
+  }
+
+  if (x < y) return -1
+  if (y < x) return 1
+  return 0
+}
+
+// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
+// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
+//
+// Arguments:
+// - buffer - a Buffer to search
+// - val - a string, Buffer, or number
+// - byteOffset - an index into `buffer`; will be clamped to an int32
+// - encoding - an optional encoding, relevant is val is a string
+// - dir - true for indexOf, false for lastIndexOf
+function bidirectionalIndexOf (buffer, val, byteOffset, encoding, dir) {
+  // Empty buffer means no match
+  if (buffer.length === 0) return -1
+
+  // Normalize byteOffset
+  if (typeof byteOffset === 'string') {
+    encoding = byteOffset
+    byteOffset = 0
+  } else if (byteOffset > 0x7fffffff) {
+    byteOffset = 0x7fffffff
+  } else if (byteOffset < -0x80000000) {
+    byteOffset = -0x80000000
+  }
+  byteOffset = +byteOffset // Coerce to Number.
+  if (numberIsNaN(byteOffset)) {
+    // byteOffset: it it's undefined, null, NaN, "foo", etc, search whole buffer
+    byteOffset = dir ? 0 : (buffer.length - 1)
+  }
+
+  // Normalize byteOffset: negative offsets start from the end of the buffer
+  if (byteOffset < 0) byteOffset = buffer.length + byteOffset
+  if (byteOffset >= buffer.length) {
+    if (dir) return -1
+    else byteOffset = buffer.length - 1
+  } else if (byteOffset < 0) {
+    if (dir) byteOffset = 0
+    else return -1
+  }
+
+  // Normalize val
+  if (typeof val === 'string') {
+    val = Buffer.from(val, encoding)
+  }
+
+  // Finally, search either indexOf (if dir is true) or lastIndexOf
+  if (Buffer.isBuffer(val)) {
+    // Special case: looking for empty string/buffer always fails
+    if (val.length === 0) {
+      return -1
+    }
+    return arrayIndexOf(buffer, val, byteOffset, encoding, dir)
+  } else if (typeof val === 'number') {
+    val = val & 0xFF // Search for a byte value [0-255]
+    if (typeof Uint8Array.prototype.indexOf === 'function') {
+      if (dir) {
+        return Uint8Array.prototype.indexOf.call(buffer, val, byteOffset)
+      } else {
+        return Uint8Array.prototype.lastIndexOf.call(buffer, val, byteOffset)
+      }
+    }
+    return arrayIndexOf(buffer, [val], byteOffset, encoding, dir)
+  }
+
+  throw new TypeError('val must be string, number or Buffer')
+}
+
+function arrayIndexOf (arr, val, byteOffset, encoding, dir) {
+  let indexSize = 1
+  let arrLength = arr.length
+  let valLength = val.length
+
+  if (encoding !== undefined) {
+    encoding = String(encoding).toLowerCase()
+    if (encoding === 'ucs2' || encoding === 'ucs-2' ||
+        encoding === 'utf16le' || encoding === 'utf-16le') {
+      if (arr.length < 2 || val.length < 2) {
+        return -1
+      }
+      indexSize = 2
+      arrLength /= 2
+      valLength /= 2
+      byteOffset /= 2
+    }
+  }
+
+  function read (buf, i) {
+    if (indexSize === 1) {
+      return buf[i]
+    } else {
+      return buf.readUInt16BE(i * indexSize)
+    }
+  }
+
+  let i
+  if (dir) {
+    let foundIndex = -1
+    for (i = byteOffset; i < arrLength; i++) {
+      if (read(arr, i) === read(val, foundIndex === -1 ? 0 : i - foundIndex)) {
+        if (foundIndex === -1) foundIndex = i
+        if (i - foundIndex + 1 === valLength) return foundIndex * indexSize
+      } else {
+        if (foundIndex !== -1) i -= i - foundIndex
+        foundIndex = -1
+      }
+    }
+  } else {
+    if (byteOffset + valLength > arrLength) byteOffset = arrLength - valLength
+    for (i = byteOffset; i >= 0; i--) {
+      let found = true
+      for (let j = 0; j < valLength; j++) {
+        if (read(arr, i + j) !== read(val, j)) {
+          found = false
+          break
+        }
+      }
+      if (found) return i
+    }
+  }
+
+  return -1
+}
+
+Buffer.prototype.includes = function includes (val, byteOffset, encoding) {
+  return this.indexOf(val, byteOffset, encoding) !== -1
+}
+
+Buffer.prototype.indexOf = function indexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, true)
+}
+
+Buffer.prototype.lastIndexOf = function lastIndexOf (val, byteOffset, encoding) {
+  return bidirectionalIndexOf(this, val, byteOffset, encoding, false)
+}
+
+function hexWrite (buf, string, offset, length) {
+  offset = Number(offset) || 0
+  const remaining = buf.length - offset
+  if (!length) {
+    length = remaining
+  } else {
+    length = Number(length)
+    if (length > remaining) {
+      length = remaining
+    }
+  }
+
+  const strLen = string.length
+
+  if (length > strLen / 2) {
+    length = strLen / 2
+  }
+  let i
+  for (i = 0; i < length; ++i) {
+    const parsed = parseInt(string.substr(i * 2, 2), 16)
+    if (numberIsNaN(parsed)) return i
+    buf[offset + i] = parsed
+  }
+  return i
+}
+
+function utf8Write (buf, string, offset, length) {
+  return blitBuffer(utf8ToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+function asciiWrite (buf, string, offset, length) {
+  return blitBuffer(asciiToBytes(string), buf, offset, length)
+}
+
+function base64Write (buf, string, offset, length) {
+  return blitBuffer(base64ToBytes(string), buf, offset, length)
+}
+
+function ucs2Write (buf, string, offset, length) {
+  return blitBuffer(utf16leToBytes(string, buf.length - offset), buf, offset, length)
+}
+
+Buffer.prototype.write = function write (string, offset, length, encoding) {
+  // Buffer#write(string)
+  if (offset === undefined) {
+    encoding = 'utf8'
+    length = this.length
+    offset = 0
+  // Buffer#write(string, encoding)
+  } else if (length === undefined && typeof offset === 'string') {
+    encoding = offset
+    length = this.length
+    offset = 0
+  // Buffer#write(string, offset[, length][, encoding])
+  } else if (isFinite(offset)) {
+    offset = offset >>> 0
+    if (isFinite(length)) {
+      length = length >>> 0
+      if (encoding === undefined) encoding = 'utf8'
+    } else {
+      encoding = length
+      length = undefined
+    }
+  } else {
+    throw new Error(
+      'Buffer.write(string, encoding, offset[, length]) is no longer supported'
+    )
+  }
+
+  const remaining = this.length - offset
+  if (length === undefined || length > remaining) length = remaining
+
+  if ((string.length > 0 && (length < 0 || offset < 0)) || offset > this.length) {
+    throw new RangeError('Attempt to write outside buffer bounds')
+  }
+
+  if (!encoding) encoding = 'utf8'
+
+  let loweredCase = false
+  for (;;) {
+    switch (encoding) {
+      case 'hex':
+        return hexWrite(this, string, offset, length)
+
+      case 'utf8':
+      case 'utf-8':
+        return utf8Write(this, string, offset, length)
+
+      case 'ascii':
+      case 'latin1':
+      case 'binary':
+        return asciiWrite(this, string, offset, length)
+
+      case 'base64':
+        // Warning: maxLength not taken into account in base64Write
+        return base64Write(this, string, offset, length)
+
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return ucs2Write(this, string, offset, length)
+
+      default:
+        if (loweredCase) throw new TypeError('Unknown encoding: ' + encoding)
+        encoding = ('' + encoding).toLowerCase()
+        loweredCase = true
+    }
+  }
+}
+
+Buffer.prototype.toJSON = function toJSON () {
+  return {
+    type: 'Buffer',
+    data: Array.prototype.slice.call(this._arr || this, 0)
+  }
+}
+
+function base64Slice (buf, start, end) {
+  if (start === 0 && end === buf.length) {
+    return base64.fromByteArray(buf)
+  } else {
+    return base64.fromByteArray(buf.slice(start, end))
+  }
+}
+
+function utf8Slice (buf, start, end) {
+  end = Math.min(buf.length, end)
+  const res = []
+
+  let i = start
+  while (i < end) {
+    const firstByte = buf[i]
+    let codePoint = null
+    let bytesPerSequence = (firstByte > 0xEF)
+      ? 4
+      : (firstByte > 0xDF)
+          ? 3
+          : (firstByte > 0xBF)
+              ? 2
+              : 1
+
+    if (i + bytesPerSequence <= end) {
+      let secondByte, thirdByte, fourthByte, tempCodePoint
+
+      switch (bytesPerSequence) {
+        case 1:
+          if (firstByte < 0x80) {
+            codePoint = firstByte
+          }
+          break
+        case 2:
+          secondByte = buf[i + 1]
+          if ((secondByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0x1F) << 0x6 | (secondByte & 0x3F)
+            if (tempCodePoint > 0x7F) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 3:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0xC | (secondByte & 0x3F) << 0x6 | (thirdByte & 0x3F)
+            if (tempCodePoint > 0x7FF && (tempCodePoint < 0xD800 || tempCodePoint > 0xDFFF)) {
+              codePoint = tempCodePoint
+            }
+          }
+          break
+        case 4:
+          secondByte = buf[i + 1]
+          thirdByte = buf[i + 2]
+          fourthByte = buf[i + 3]
+          if ((secondByte & 0xC0) === 0x80 && (thirdByte & 0xC0) === 0x80 && (fourthByte & 0xC0) === 0x80) {
+            tempCodePoint = (firstByte & 0xF) << 0x12 | (secondByte & 0x3F) << 0xC | (thirdByte & 0x3F) << 0x6 | (fourthByte & 0x3F)
+            if (tempCodePoint > 0xFFFF && tempCodePoint < 0x110000) {
+              codePoint = tempCodePoint
+            }
+          }
+      }
+    }
+
+    if (codePoint === null) {
+      // we did not generate a valid codePoint so insert a
+      // replacement char (U+FFFD) and advance only 1 byte
+      codePoint = 0xFFFD
+      bytesPerSequence = 1
+    } else if (codePoint > 0xFFFF) {
+      // encode to utf16 (surrogate pair dance)
+      codePoint -= 0x10000
+      res.push(codePoint >>> 10 & 0x3FF | 0xD800)
+      codePoint = 0xDC00 | codePoint & 0x3FF
+    }
+
+    res.push(codePoint)
+    i += bytesPerSequence
+  }
+
+  return decodeCodePointsArray(res)
+}
+
+// Based on http://stackoverflow.com/a/22747272/680742, the browser with
+// the lowest limit is Chrome, with 0x10000 args.
+// We go 1 magnitude less, for safety
+const MAX_ARGUMENTS_LENGTH = 0x1000
+
+function decodeCodePointsArray (codePoints) {
+  const len = codePoints.length
+  if (len <= MAX_ARGUMENTS_LENGTH) {
+    return String.fromCharCode.apply(String, codePoints) // avoid extra slice()
+  }
+
+  // Decode in chunks to avoid "call stack size exceeded".
+  let res = ''
+  let i = 0
+  while (i < len) {
+    res += String.fromCharCode.apply(
+      String,
+      codePoints.slice(i, i += MAX_ARGUMENTS_LENGTH)
+    )
+  }
+  return res
+}
+
+function asciiSlice (buf, start, end) {
+  let ret = ''
+  end = Math.min(buf.length, end)
+
+  for (let i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i] & 0x7F)
+  }
+  return ret
+}
+
+function latin1Slice (buf, start, end) {
+  let ret = ''
+  end = Math.min(buf.length, end)
+
+  for (let i = start; i < end; ++i) {
+    ret += String.fromCharCode(buf[i])
+  }
+  return ret
+}
+
+function hexSlice (buf, start, end) {
+  const len = buf.length
+
+  if (!start || start < 0) start = 0
+  if (!end || end < 0 || end > len) end = len
+
+  let out = ''
+  for (let i = start; i < end; ++i) {
+    out += hexSliceLookupTable[buf[i]]
+  }
+  return out
+}
+
+function utf16leSlice (buf, start, end) {
+  const bytes = buf.slice(start, end)
+  let res = ''
+  // If bytes.length is odd, the last 8 bits must be ignored (same as node.js)
+  for (let i = 0; i < bytes.length - 1; i += 2) {
+    res += String.fromCharCode(bytes[i] + (bytes[i + 1] * 256))
+  }
+  return res
+}
+
+Buffer.prototype.slice = function slice (start, end) {
+  const len = this.length
+  start = ~~start
+  end = end === undefined ? len : ~~end
+
+  if (start < 0) {
+    start += len
+    if (start < 0) start = 0
+  } else if (start > len) {
+    start = len
+  }
+
+  if (end < 0) {
+    end += len
+    if (end < 0) end = 0
+  } else if (end > len) {
+    end = len
+  }
+
+  if (end < start) end = start
+
+  const newBuf = this.subarray(start, end)
+  // Return an augmented `Uint8Array` instance
+  Object.setPrototypeOf(newBuf, Buffer.prototype)
+
+  return newBuf
+}
+
+/*
+ * Need to make sure that buffer isn't trying to write out of bounds.
+ */
+function checkOffset (offset, ext, length) {
+  if ((offset % 1) !== 0 || offset < 0) throw new RangeError('offset is not uint')
+  if (offset + ext > length) throw new RangeError('Trying to access beyond buffer length')
+}
+
+Buffer.prototype.readUintLE =
+Buffer.prototype.readUIntLE = function readUIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  let val = this[offset]
+  let mul = 1
+  let i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUintBE =
+Buffer.prototype.readUIntBE = function readUIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    checkOffset(offset, byteLength, this.length)
+  }
+
+  let val = this[offset + --byteLength]
+  let mul = 1
+  while (byteLength > 0 && (mul *= 0x100)) {
+    val += this[offset + --byteLength] * mul
+  }
+
+  return val
+}
+
+Buffer.prototype.readUint8 =
+Buffer.prototype.readUInt8 = function readUInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  return this[offset]
+}
+
+Buffer.prototype.readUint16LE =
+Buffer.prototype.readUInt16LE = function readUInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return this[offset] | (this[offset + 1] << 8)
+}
+
+Buffer.prototype.readUint16BE =
+Buffer.prototype.readUInt16BE = function readUInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  return (this[offset] << 8) | this[offset + 1]
+}
+
+Buffer.prototype.readUint32LE =
+Buffer.prototype.readUInt32LE = function readUInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return ((this[offset]) |
+      (this[offset + 1] << 8) |
+      (this[offset + 2] << 16)) +
+      (this[offset + 3] * 0x1000000)
+}
+
+Buffer.prototype.readUint32BE =
+Buffer.prototype.readUInt32BE = function readUInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] * 0x1000000) +
+    ((this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    this[offset + 3])
+}
+
+Buffer.prototype.readBigUInt64LE = defineBigIntMethod(function readBigUInt64LE (offset) {
+  offset = offset >>> 0
+  validateNumber(offset, 'offset')
+  const first = this[offset]
+  const last = this[offset + 7]
+  if (first === undefined || last === undefined) {
+    boundsError(offset, this.length - 8)
+  }
+
+  const lo = first +
+    this[++offset] * 2 ** 8 +
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 24
+
+  const hi = this[++offset] +
+    this[++offset] * 2 ** 8 +
+    this[++offset] * 2 ** 16 +
+    last * 2 ** 24
+
+  return BigInt(lo) + (BigInt(hi) << BigInt(32))
+})
+
+Buffer.prototype.readBigUInt64BE = defineBigIntMethod(function readBigUInt64BE (offset) {
+  offset = offset >>> 0
+  validateNumber(offset, 'offset')
+  const first = this[offset]
+  const last = this[offset + 7]
+  if (first === undefined || last === undefined) {
+    boundsError(offset, this.length - 8)
+  }
+
+  const hi = first * 2 ** 24 +
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 8 +
+    this[++offset]
+
+  const lo = this[++offset] * 2 ** 24 +
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 8 +
+    last
+
+  return (BigInt(hi) << BigInt(32)) + BigInt(lo)
+})
+
+Buffer.prototype.readIntLE = function readIntLE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  let val = this[offset]
+  let mul = 1
+  let i = 0
+  while (++i < byteLength && (mul *= 0x100)) {
+    val += this[offset + i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readIntBE = function readIntBE (offset, byteLength, noAssert) {
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) checkOffset(offset, byteLength, this.length)
+
+  let i = byteLength
+  let mul = 1
+  let val = this[offset + --i]
+  while (i > 0 && (mul *= 0x100)) {
+    val += this[offset + --i] * mul
+  }
+  mul *= 0x80
+
+  if (val >= mul) val -= Math.pow(2, 8 * byteLength)
+
+  return val
+}
+
+Buffer.prototype.readInt8 = function readInt8 (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 1, this.length)
+  if (!(this[offset] & 0x80)) return (this[offset])
+  return ((0xff - this[offset] + 1) * -1)
+}
+
+Buffer.prototype.readInt16LE = function readInt16LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  const val = this[offset] | (this[offset + 1] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt16BE = function readInt16BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 2, this.length)
+  const val = this[offset + 1] | (this[offset] << 8)
+  return (val & 0x8000) ? val | 0xFFFF0000 : val
+}
+
+Buffer.prototype.readInt32LE = function readInt32LE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset]) |
+    (this[offset + 1] << 8) |
+    (this[offset + 2] << 16) |
+    (this[offset + 3] << 24)
+}
+
+Buffer.prototype.readInt32BE = function readInt32BE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+
+  return (this[offset] << 24) |
+    (this[offset + 1] << 16) |
+    (this[offset + 2] << 8) |
+    (this[offset + 3])
+}
+
+Buffer.prototype.readBigInt64LE = defineBigIntMethod(function readBigInt64LE (offset) {
+  offset = offset >>> 0
+  validateNumber(offset, 'offset')
+  const first = this[offset]
+  const last = this[offset + 7]
+  if (first === undefined || last === undefined) {
+    boundsError(offset, this.length - 8)
+  }
+
+  const val = this[offset + 4] +
+    this[offset + 5] * 2 ** 8 +
+    this[offset + 6] * 2 ** 16 +
+    (last << 24) // Overflow
+
+  return (BigInt(val) << BigInt(32)) +
+    BigInt(first +
+    this[++offset] * 2 ** 8 +
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 24)
+})
+
+Buffer.prototype.readBigInt64BE = defineBigIntMethod(function readBigInt64BE (offset) {
+  offset = offset >>> 0
+  validateNumber(offset, 'offset')
+  const first = this[offset]
+  const last = this[offset + 7]
+  if (first === undefined || last === undefined) {
+    boundsError(offset, this.length - 8)
+  }
+
+  const val = (first << 24) + // Overflow
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 8 +
+    this[++offset]
+
+  return (BigInt(val) << BigInt(32)) +
+    BigInt(this[++offset] * 2 ** 24 +
+    this[++offset] * 2 ** 16 +
+    this[++offset] * 2 ** 8 +
+    last)
+})
+
+Buffer.prototype.readFloatLE = function readFloatLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, true, 23, 4)
+}
+
+Buffer.prototype.readFloatBE = function readFloatBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 4, this.length)
+  return ieee754.read(this, offset, false, 23, 4)
+}
+
+Buffer.prototype.readDoubleLE = function readDoubleLE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, true, 52, 8)
+}
+
+Buffer.prototype.readDoubleBE = function readDoubleBE (offset, noAssert) {
+  offset = offset >>> 0
+  if (!noAssert) checkOffset(offset, 8, this.length)
+  return ieee754.read(this, offset, false, 52, 8)
+}
+
+function checkInt (buf, value, offset, ext, max, min) {
+  if (!Buffer.isBuffer(buf)) throw new TypeError('"buffer" argument must be a Buffer instance')
+  if (value > max || value < min) throw new RangeError('"value" argument is out of bounds')
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+}
+
+Buffer.prototype.writeUintLE =
+Buffer.prototype.writeUIntLE = function writeUIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    const maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
+  }
+
+  let mul = 1
+  let i = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUintBE =
+Buffer.prototype.writeUIntBE = function writeUIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  byteLength = byteLength >>> 0
+  if (!noAssert) {
+    const maxBytes = Math.pow(2, 8 * byteLength) - 1
+    checkInt(this, value, offset, byteLength, maxBytes, 0)
+  }
+
+  let i = byteLength - 1
+  let mul = 1
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    this[offset + i] = (value / mul) & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeUint8 =
+Buffer.prototype.writeUInt8 = function writeUInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0xff, 0)
+  this[offset] = (value & 0xff)
+  return offset + 1
+}
+
+Buffer.prototype.writeUint16LE =
+Buffer.prototype.writeUInt16LE = function writeUInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
+
+Buffer.prototype.writeUint16BE =
+Buffer.prototype.writeUInt16BE = function writeUInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0xffff, 0)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
+
+Buffer.prototype.writeUint32LE =
+Buffer.prototype.writeUInt32LE = function writeUInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset + 3] = (value >>> 24)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 1] = (value >>> 8)
+  this[offset] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeUint32BE =
+Buffer.prototype.writeUInt32BE = function writeUInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0xffffffff, 0)
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
+
+function wrtBigUInt64LE (buf, value, offset, min, max) {
+  checkIntBI(value, min, max, buf, offset, 7)
+
+  let lo = Number(value & BigInt(0xffffffff))
+  buf[offset++] = lo
+  lo = lo >> 8
+  buf[offset++] = lo
+  lo = lo >> 8
+  buf[offset++] = lo
+  lo = lo >> 8
+  buf[offset++] = lo
+  let hi = Number(value >> BigInt(32) & BigInt(0xffffffff))
+  buf[offset++] = hi
+  hi = hi >> 8
+  buf[offset++] = hi
+  hi = hi >> 8
+  buf[offset++] = hi
+  hi = hi >> 8
+  buf[offset++] = hi
+  return offset
+}
+
+function wrtBigUInt64BE (buf, value, offset, min, max) {
+  checkIntBI(value, min, max, buf, offset, 7)
+
+  let lo = Number(value & BigInt(0xffffffff))
+  buf[offset + 7] = lo
+  lo = lo >> 8
+  buf[offset + 6] = lo
+  lo = lo >> 8
+  buf[offset + 5] = lo
+  lo = lo >> 8
+  buf[offset + 4] = lo
+  let hi = Number(value >> BigInt(32) & BigInt(0xffffffff))
+  buf[offset + 3] = hi
+  hi = hi >> 8
+  buf[offset + 2] = hi
+  hi = hi >> 8
+  buf[offset + 1] = hi
+  hi = hi >> 8
+  buf[offset] = hi
+  return offset + 8
+}
+
+Buffer.prototype.writeBigUInt64LE = defineBigIntMethod(function writeBigUInt64LE (value, offset = 0) {
+  return wrtBigUInt64LE(this, value, offset, BigInt(0), BigInt('0xffffffffffffffff'))
+})
+
+Buffer.prototype.writeBigUInt64BE = defineBigIntMethod(function writeBigUInt64BE (value, offset = 0) {
+  return wrtBigUInt64BE(this, value, offset, BigInt(0), BigInt('0xffffffffffffffff'))
+})
+
+Buffer.prototype.writeIntLE = function writeIntLE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    const limit = Math.pow(2, (8 * byteLength) - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  let i = 0
+  let mul = 1
+  let sub = 0
+  this[offset] = value & 0xFF
+  while (++i < byteLength && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeIntBE = function writeIntBE (value, offset, byteLength, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    const limit = Math.pow(2, (8 * byteLength) - 1)
+
+    checkInt(this, value, offset, byteLength, limit - 1, -limit)
+  }
+
+  let i = byteLength - 1
+  let mul = 1
+  let sub = 0
+  this[offset + i] = value & 0xFF
+  while (--i >= 0 && (mul *= 0x100)) {
+    if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
+      sub = 1
+    }
+    this[offset + i] = ((value / mul) >> 0) - sub & 0xFF
+  }
+
+  return offset + byteLength
+}
+
+Buffer.prototype.writeInt8 = function writeInt8 (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 1, 0x7f, -0x80)
+  if (value < 0) value = 0xff + value + 1
+  this[offset] = (value & 0xff)
+  return offset + 1
+}
+
+Buffer.prototype.writeInt16LE = function writeInt16LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  return offset + 2
+}
+
+Buffer.prototype.writeInt16BE = function writeInt16BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 2, 0x7fff, -0x8000)
+  this[offset] = (value >>> 8)
+  this[offset + 1] = (value & 0xff)
+  return offset + 2
+}
+
+Buffer.prototype.writeInt32LE = function writeInt32LE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  this[offset] = (value & 0xff)
+  this[offset + 1] = (value >>> 8)
+  this[offset + 2] = (value >>> 16)
+  this[offset + 3] = (value >>> 24)
+  return offset + 4
+}
+
+Buffer.prototype.writeInt32BE = function writeInt32BE (value, offset, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000)
+  if (value < 0) value = 0xffffffff + value + 1
+  this[offset] = (value >>> 24)
+  this[offset + 1] = (value >>> 16)
+  this[offset + 2] = (value >>> 8)
+  this[offset + 3] = (value & 0xff)
+  return offset + 4
+}
+
+Buffer.prototype.writeBigInt64LE = defineBigIntMethod(function writeBigInt64LE (value, offset = 0) {
+  return wrtBigUInt64LE(this, value, offset, -BigInt('0x8000000000000000'), BigInt('0x7fffffffffffffff'))
+})
+
+Buffer.prototype.writeBigInt64BE = defineBigIntMethod(function writeBigInt64BE (value, offset = 0) {
+  return wrtBigUInt64BE(this, value, offset, -BigInt('0x8000000000000000'), BigInt('0x7fffffffffffffff'))
+})
+
+function checkIEEE754 (buf, value, offset, ext, max, min) {
+  if (offset + ext > buf.length) throw new RangeError('Index out of range')
+  if (offset < 0) throw new RangeError('Index out of range')
+}
+
+function writeFloat (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 4, 3.4028234663852886e+38, -3.4028234663852886e+38)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 23, 4)
+  return offset + 4
+}
+
+Buffer.prototype.writeFloatLE = function writeFloatLE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeFloatBE = function writeFloatBE (value, offset, noAssert) {
+  return writeFloat(this, value, offset, false, noAssert)
+}
+
+function writeDouble (buf, value, offset, littleEndian, noAssert) {
+  value = +value
+  offset = offset >>> 0
+  if (!noAssert) {
+    checkIEEE754(buf, value, offset, 8, 1.7976931348623157E+308, -1.7976931348623157E+308)
+  }
+  ieee754.write(buf, value, offset, littleEndian, 52, 8)
+  return offset + 8
+}
+
+Buffer.prototype.writeDoubleLE = function writeDoubleLE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, true, noAssert)
+}
+
+Buffer.prototype.writeDoubleBE = function writeDoubleBE (value, offset, noAssert) {
+  return writeDouble(this, value, offset, false, noAssert)
+}
+
+// copy(targetBuffer, targetStart=0, sourceStart=0, sourceEnd=buffer.length)
+Buffer.prototype.copy = function copy (target, targetStart, start, end) {
+  if (!Buffer.isBuffer(target)) throw new TypeError('argument should be a Buffer')
+  if (!start) start = 0
+  if (!end && end !== 0) end = this.length
+  if (targetStart >= target.length) targetStart = target.length
+  if (!targetStart) targetStart = 0
+  if (end > 0 && end < start) end = start
+
+  // Copy 0 bytes; we're done
+  if (end === start) return 0
+  if (target.length === 0 || this.length === 0) return 0
+
+  // Fatal error conditions
+  if (targetStart < 0) {
+    throw new RangeError('targetStart out of bounds')
+  }
+  if (start < 0 || start >= this.length) throw new RangeError('Index out of range')
+  if (end < 0) throw new RangeError('sourceEnd out of bounds')
+
+  // Are we oob?
+  if (end > this.length) end = this.length
+  if (target.length - targetStart < end - start) {
+    end = target.length - targetStart + start
+  }
+
+  const len = end - start
+
+  if (this === target && typeof Uint8Array.prototype.copyWithin === 'function') {
+    // Use built-in when available, missing from IE11
+    this.copyWithin(targetStart, start, end)
+  } else {
+    Uint8Array.prototype.set.call(
+      target,
+      this.subarray(start, end),
+      targetStart
+    )
+  }
+
+  return len
+}
+
+// Usage:
+//    buffer.fill(number[, offset[, end]])
+//    buffer.fill(buffer[, offset[, end]])
+//    buffer.fill(string[, offset[, end]][, encoding])
+Buffer.prototype.fill = function fill (val, start, end, encoding) {
+  // Handle string cases:
+  if (typeof val === 'string') {
+    if (typeof start === 'string') {
+      encoding = start
+      start = 0
+      end = this.length
+    } else if (typeof end === 'string') {
+      encoding = end
+      end = this.length
+    }
+    if (encoding !== undefined && typeof encoding !== 'string') {
+      throw new TypeError('encoding must be a string')
+    }
+    if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
+      throw new TypeError('Unknown encoding: ' + encoding)
+    }
+    if (val.length === 1) {
+      const code = val.charCodeAt(0)
+      if ((encoding === 'utf8' && code < 128) ||
+          encoding === 'latin1') {
+        // Fast path: If `val` fits into a single byte, use that numeric value.
+        val = code
+      }
+    }
+  } else if (typeof val === 'number') {
+    val = val & 255
+  } else if (typeof val === 'boolean') {
+    val = Number(val)
+  }
+
+  // Invalid ranges are not set to a default, so can range check early.
+  if (start < 0 || this.length < start || this.length < end) {
+    throw new RangeError('Out of range index')
+  }
+
+  if (end <= start) {
+    return this
+  }
+
+  start = start >>> 0
+  end = end === undefined ? this.length : end >>> 0
+
+  if (!val) val = 0
+
+  let i
+  if (typeof val === 'number') {
+    for (i = start; i < end; ++i) {
+      this[i] = val
+    }
+  } else {
+    const bytes = Buffer.isBuffer(val)
+      ? val
+      : Buffer.from(val, encoding)
+    const len = bytes.length
+    if (len === 0) {
+      throw new TypeError('The value "' + val +
+        '" is invalid for argument "value"')
+    }
+    for (i = 0; i < end - start; ++i) {
+      this[i + start] = bytes[i % len]
+    }
+  }
+
+  return this
+}
+
+// CUSTOM ERRORS
+// =============
+
+// Simplified versions from Node, changed for Buffer-only usage
+const errors = {}
+function E (sym, getMessage, Base) {
+  errors[sym] = class NodeError extends Base {
+    constructor () {
+      super()
+
+      Object.defineProperty(this, 'message', {
+        value: getMessage.apply(this, arguments),
+        writable: true,
+        configurable: true
+      })
+
+      // Add the error code to the name to include it in the stack trace.
+      this.name = `${this.name} [${sym}]`
+      // Access the stack to generate the error message including the error code
+      // from the name.
+      this.stack // eslint-disable-line no-unused-expressions
+      // Reset the name to the actual name.
+      delete this.name
+    }
+
+    get code () {
+      return sym
+    }
+
+    set code (value) {
+      Object.defineProperty(this, 'code', {
+        configurable: true,
+        enumerable: true,
+        value,
+        writable: true
+      })
+    }
+
+    toString () {
+      return `${this.name} [${sym}]: ${this.message}`
+    }
+  }
+}
+
+E('ERR_BUFFER_OUT_OF_BOUNDS',
+  function (name) {
+    if (name) {
+      return `${name} is outside of buffer bounds`
+    }
+
+    return 'Attempt to access memory outside buffer bounds'
+  }, RangeError)
+E('ERR_INVALID_ARG_TYPE',
+  function (name, actual) {
+    return `The "${name}" argument must be of type number. Received type ${typeof actual}`
+  }, TypeError)
+E('ERR_OUT_OF_RANGE',
+  function (str, range, input) {
+    let msg = `The value of "${str}" is out of range.`
+    let received = input
+    if (Number.isInteger(input) && Math.abs(input) > 2 ** 32) {
+      received = addNumericalSeparator(String(input))
+    } else if (typeof input === 'bigint') {
+      received = String(input)
+      if (input > BigInt(2) ** BigInt(32) || input < -(BigInt(2) ** BigInt(32))) {
+        received = addNumericalSeparator(received)
+      }
+      received += 'n'
+    }
+    msg += ` It must be ${range}. Received ${received}`
+    return msg
+  }, RangeError)
+
+function addNumericalSeparator (val) {
+  let res = ''
+  let i = val.length
+  const start = val[0] === '-' ? 1 : 0
+  for (; i >= start + 4; i -= 3) {
+    res = `_${val.slice(i - 3, i)}${res}`
+  }
+  return `${val.slice(0, i)}${res}`
+}
+
+// CHECK FUNCTIONS
+// ===============
+
+function checkBounds (buf, offset, byteLength) {
+  validateNumber(offset, 'offset')
+  if (buf[offset] === undefined || buf[offset + byteLength] === undefined) {
+    boundsError(offset, buf.length - (byteLength + 1))
+  }
+}
+
+function checkIntBI (value, min, max, buf, offset, byteLength) {
+  if (value > max || value < min) {
+    const n = typeof min === 'bigint' ? 'n' : ''
+    let range
+    if (byteLength > 3) {
+      if (min === 0 || min === BigInt(0)) {
+        range = `>= 0${n} and < 2${n} ** ${(byteLength + 1) * 8}${n}`
+      } else {
+        range = `>= -(2${n} ** ${(byteLength + 1) * 8 - 1}${n}) and < 2 ** ` +
+                `${(byteLength + 1) * 8 - 1}${n}`
+      }
+    } else {
+      range = `>= ${min}${n} and <= ${max}${n}`
+    }
+    throw new errors.ERR_OUT_OF_RANGE('value', range, value)
+  }
+  checkBounds(buf, offset, byteLength)
+}
+
+function validateNumber (value, name) {
+  if (typeof value !== 'number') {
+    throw new errors.ERR_INVALID_ARG_TYPE(name, 'number', value)
+  }
+}
+
+function boundsError (value, length, type) {
+  if (Math.floor(value) !== value) {
+    validateNumber(value, type)
+    throw new errors.ERR_OUT_OF_RANGE(type || 'offset', 'an integer', value)
+  }
+
+  if (length < 0) {
+    throw new errors.ERR_BUFFER_OUT_OF_BOUNDS()
+  }
+
+  throw new errors.ERR_OUT_OF_RANGE(type || 'offset',
+                                    `>= ${type ? 1 : 0} and <= ${length}`,
+                                    value)
+}
+
+// HELPER FUNCTIONS
+// ================
+
+const INVALID_BASE64_RE = /[^+/0-9A-Za-z-_]/g
+
+function base64clean (str) {
+  // Node takes equal signs as end of the Base64 encoding
+  str = str.split('=')[0]
+  // Node strips out invalid characters like \n and \t from the string, base64-js does not
+  str = str.trim().replace(INVALID_BASE64_RE, '')
+  // Node converts strings with length < 2 to ''
+  if (str.length < 2) return ''
+  // Node allows for non-padded base64 strings (missing trailing ===), base64-js does not
+  while (str.length % 4 !== 0) {
+    str = str + '='
+  }
+  return str
+}
+
+function utf8ToBytes (string, units) {
+  units = units || Infinity
+  let codePoint
+  const length = string.length
+  let leadSurrogate = null
+  const bytes = []
+
+  for (let i = 0; i < length; ++i) {
+    codePoint = string.charCodeAt(i)
+
+    // is surrogate component
+    if (codePoint > 0xD7FF && codePoint < 0xE000) {
+      // last char was a lead
+      if (!leadSurrogate) {
+        // no lead yet
+        if (codePoint > 0xDBFF) {
+          // unexpected trail
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        } else if (i + 1 === length) {
+          // unpaired lead
+          if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+          continue
+        }
+
+        // valid lead
+        leadSurrogate = codePoint
+
+        continue
+      }
+
+      // 2 leads in a row
+      if (codePoint < 0xDC00) {
+        if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+        leadSurrogate = codePoint
+        continue
+      }
+
+      // valid surrogate pair
+      codePoint = (leadSurrogate - 0xD800 << 10 | codePoint - 0xDC00) + 0x10000
+    } else if (leadSurrogate) {
+      // valid bmp char, but last char was a lead
+      if ((units -= 3) > -1) bytes.push(0xEF, 0xBF, 0xBD)
+    }
+
+    leadSurrogate = null
+
+    // encode utf8
+    if (codePoint < 0x80) {
+      if ((units -= 1) < 0) break
+      bytes.push(codePoint)
+    } else if (codePoint < 0x800) {
+      if ((units -= 2) < 0) break
+      bytes.push(
+        codePoint >> 0x6 | 0xC0,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x10000) {
+      if ((units -= 3) < 0) break
+      bytes.push(
+        codePoint >> 0xC | 0xE0,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else if (codePoint < 0x110000) {
+      if ((units -= 4) < 0) break
+      bytes.push(
+        codePoint >> 0x12 | 0xF0,
+        codePoint >> 0xC & 0x3F | 0x80,
+        codePoint >> 0x6 & 0x3F | 0x80,
+        codePoint & 0x3F | 0x80
+      )
+    } else {
+      throw new Error('Invalid code point')
+    }
+  }
+
+  return bytes
+}
+
+function asciiToBytes (str) {
+  const byteArray = []
+  for (let i = 0; i < str.length; ++i) {
+    // Node's code seems to be doing this and not & 0x7F..
+    byteArray.push(str.charCodeAt(i) & 0xFF)
+  }
+  return byteArray
+}
+
+function utf16leToBytes (str, units) {
+  let c, hi, lo
+  const byteArray = []
+  for (let i = 0; i < str.length; ++i) {
+    if ((units -= 2) < 0) break
+
+    c = str.charCodeAt(i)
+    hi = c >> 8
+    lo = c % 256
+    byteArray.push(lo)
+    byteArray.push(hi)
+  }
+
+  return byteArray
+}
+
+function base64ToBytes (str) {
+  return base64.toByteArray(base64clean(str))
+}
+
+function blitBuffer (src, dst, offset, length) {
+  let i
+  for (i = 0; i < length; ++i) {
+    if ((i + offset >= dst.length) || (i >= src.length)) break
+    dst[i + offset] = src[i]
+  }
+  return i
+}
+
+// ArrayBuffer or Uint8Array objects from other contexts (i.e. iframes) do not pass
+// the `instanceof` check but they should be treated as of that type.
+// See: https://github.com/feross/buffer/issues/166
+function isInstance (obj, type) {
+  return obj instanceof type ||
+    (obj != null && obj.constructor != null && obj.constructor.name != null &&
+      obj.constructor.name === type.name)
+}
+function numberIsNaN (obj) {
+  // For IE11 support
+  return obj !== obj // eslint-disable-line no-self-compare
+}
+
+// Create lookup table for `toString('hex')`
+// See: https://github.com/feross/buffer/issues/219
+const hexSliceLookupTable = (function () {
+  const alphabet = '0123456789abcdef'
+  const table = new Array(256)
+  for (let i = 0; i < 16; ++i) {
+    const i16 = i * 16
+    for (let j = 0; j < 16; ++j) {
+      table[i16 + j] = alphabet[i] + alphabet[j]
+    }
+  }
+  return table
+})()
+
+// Return not function with Error if BigInt not supported
+function defineBigIntMethod (fn) {
+  return typeof BigInt === 'undefined' ? BufferBigIntNotDefined : fn
+}
+
+function BufferBigIntNotDefined () {
+  throw new Error('BigInt not supported')
+}
diff --git a/mqtt-backend/node_modules/readable-stream/node_modules/buffer/package.json b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/package.json
new file mode 100644
index 0000000..ca1ad9a
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/node_modules/buffer/package.json
@@ -0,0 +1,93 @@
+{
+  "name": "buffer",
+  "description": "Node.js Buffer API, for the browser",
+  "version": "6.0.3",
+  "author": {
+    "name": "Feross Aboukhadijeh",
+    "email": "feross@feross.org",
+    "url": "https://feross.org"
+  },
+  "bugs": {
+    "url": "https://github.com/feross/buffer/issues"
+  },
+  "contributors": [
+    "Romain Beauxis <toots@rastageeks.org>",
+    "James Halliday <mail@substack.net>"
+  ],
+  "dependencies": {
+    "base64-js": "^1.3.1",
+    "ieee754": "^1.2.1"
+  },
+  "devDependencies": {
+    "airtap": "^3.0.0",
+    "benchmark": "^2.1.4",
+    "browserify": "^17.0.0",
+    "concat-stream": "^2.0.0",
+    "hyperquest": "^2.1.3",
+    "is-buffer": "^2.0.5",
+    "is-nan": "^1.3.0",
+    "split": "^1.0.1",
+    "standard": "*",
+    "tape": "^5.0.1",
+    "through2": "^4.0.2",
+    "uglify-js": "^3.11.5"
+  },
+  "homepage": "https://github.com/feross/buffer",
+  "jspm": {
+    "map": {
+      "./index.js": {
+        "node": "@node/buffer"
+      }
+    }
+  },
+  "keywords": [
+    "arraybuffer",
+    "browser",
+    "browserify",
+    "buffer",
+    "compatible",
+    "dataview",
+    "uint8array"
+  ],
+  "license": "MIT",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/feross/buffer.git"
+  },
+  "scripts": {
+    "perf": "browserify --debug perf/bracket-notation.js > perf/bundle.js && open perf/index.html",
+    "perf-node": "node perf/bracket-notation.js && node perf/concat.js && node perf/copy-big.js && node perf/copy.js && node perf/new-big.js && node perf/new.js && node perf/readDoubleBE.js && node perf/readFloatBE.js && node perf/readUInt32LE.js && node perf/slice.js && node perf/writeFloatBE.js",
+    "size": "browserify -r ./ | uglifyjs -c -m | gzip | wc -c",
+    "test": "standard && node ./bin/test.js",
+    "test-browser-old": "airtap -- test/*.js",
+    "test-browser-old-local": "airtap --local -- test/*.js",
+    "test-browser-new": "airtap -- test/*.js test/node/*.js",
+    "test-browser-new-local": "airtap --local -- test/*.js test/node/*.js",
+    "test-node": "tape test/*.js test/node/*.js",
+    "update-authors": "./bin/update-authors.sh"
+  },
+  "standard": {
+    "ignore": [
+      "test/node/**/*.js",
+      "test/common.js",
+      "test/_polyfill.js",
+      "perf/**/*.js"
+    ]
+  },
+  "funding": [
+    {
+      "type": "github",
+      "url": "https://github.com/sponsors/feross"
+    },
+    {
+      "type": "patreon",
+      "url": "https://www.patreon.com/feross"
+    },
+    {
+      "type": "consulting",
+      "url": "https://feross.org/support"
+    }
+  ]
+}
diff --git a/mqtt-backend/node_modules/readable-stream/package.json b/mqtt-backend/node_modules/readable-stream/package.json
new file mode 100644
index 0000000..98b48e6
--- /dev/null
+++ b/mqtt-backend/node_modules/readable-stream/package.json
@@ -0,0 +1,88 @@
+{
+  "name": "readable-stream",
+  "version": "4.7.0",
+  "description": "Node.js Streams, a user-land copy of the stream library from Node.js",
+  "homepage": "https://github.com/nodejs/readable-stream",
+  "license": "MIT",
+  "licenses": [
+    {
+      "type": "MIT",
+      "url": "https://choosealicense.com/licenses/mit/"
+    }
+  ],
+  "keywords": [
+    "readable",
+    "stream",
+    "pipe"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/nodejs/readable-stream"
+  },
+  "bugs": {
+    "url": "https://github.com/nodejs/readable-stream/issues"
+  },
+  "main": "lib/ours/index.js",
+  "files": [
+    "lib",
+    "LICENSE",
+    "README.md"
+  ],
+  "browser": {
+    "util": "./lib/ours/util.js",
+    "./lib/ours/index.js": "./lib/ours/browser.js"
+  },
+  "scripts": {
+    "build": "node build/build.mjs 18.19.0",
+    "postbuild": "prettier -w lib test",
+    "test": "tap --rcfile=./tap.yml test/parallel/test-*.js test/ours/test-*.js",
+    "test:prepare": "node test/browser/runner-prepare.mjs",
+    "test:browsers": "node test/browser/runner-browser.mjs",
+    "test:bundlers": "node test/browser/runner-node.mjs",
+    "test:readable-stream-only": "node readable-stream-test/runner-prepare.mjs",
+    "coverage": "c8 -c ./c8.json tap --rcfile=./tap.yml test/parallel/test-*.js test/ours/test-*.js",
+    "format": "prettier -w src lib test",
+    "test:format": "prettier -c src lib test",
+    "lint": "eslint src"
+  },
+  "dependencies": {
+    "abort-controller": "^3.0.0",
+    "buffer": "^6.0.3",
+    "events": "^3.3.0",
+    "process": "^0.11.10",
+    "string_decoder": "^1.3.0"
+  },
+  "devDependencies": {
+    "@babel/core": "^7.17.10",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "^7.16.7",
+    "@babel/plugin-proposal-optional-chaining": "^7.16.7",
+    "@eslint/eslintrc": "^3.2.0",
+    "@rollup/plugin-commonjs": "^22.0.0",
+    "@rollup/plugin-inject": "^4.0.4",
+    "@rollup/plugin-node-resolve": "^13.3.0",
+    "@sinonjs/fake-timers": "^9.1.2",
+    "browserify": "^17.0.0",
+    "c8": "^7.11.2",
+    "esbuild": "^0.19.9",
+    "esbuild-plugin-alias": "^0.2.1",
+    "eslint": "^8.15.0",
+    "eslint-config-standard": "^17.0.0",
+    "eslint-plugin-import": "^2.26.0",
+    "eslint-plugin-n": "^15.2.0",
+    "eslint-plugin-promise": "^6.0.0",
+    "playwright": "^1.21.1",
+    "prettier": "^2.6.2",
+    "rollup": "^2.72.1",
+    "rollup-plugin-polyfill-node": "^0.9.0",
+    "tap": "^16.2.0",
+    "tap-mocha-reporter": "^5.0.3",
+    "tape": "^5.5.3",
+    "tar": "^6.1.11",
+    "undici": "^5.1.1",
+    "webpack": "^5.72.1",
+    "webpack-cli": "^4.9.2"
+  },
+  "engines": {
+    "node": "^12.22.0 || ^14.17.0 || >=16.0.0"
+  }
+}
diff --git a/mqtt-backend/node_modules/retimer/.github/workflows/ci.yml b/mqtt-backend/node_modules/retimer/.github/workflows/ci.yml
new file mode 100644
index 0000000..a6b2115
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/.github/workflows/ci.yml
@@ -0,0 +1,30 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                node-version: [16.x, 18.x, 20.x]
+            fail-fast: false
+
+        steps:
+        - uses: actions/checkout@v3
+        - name: Use Node.js ${{ matrix.node-version }}
+          uses: actions/setup-node@v3
+          with:
+            node-version: ${{ matrix.node-version }}
+
+        - name: Install Dependencies
+          run: npm install
+
+        - name: Lint
+          if: matrix.node-version == '20.x'
+          run: |
+            npx standard
+        
+        - name: Test
+          run: |
+            npm test
diff --git a/mqtt-backend/node_modules/retimer/LICENSE b/mqtt-backend/node_modules/retimer/LICENSE
new file mode 100644
index 0000000..fbf3a01
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2015 Matteo Collina
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
diff --git a/mqtt-backend/node_modules/retimer/README.md b/mqtt-backend/node_modules/retimer/README.md
new file mode 100644
index 0000000..dd83274
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/README.md
@@ -0,0 +1,61 @@
+# retimer&nbsp;&nbsp;[![Build Status](https://travis-ci.org/mcollina/retimer.png)](https://travis-ci.org/mcollina/retimer)
+
+reschedulable setTimeout for your node needs. This library is built for
+building a keep alive functionality across a large numbers of
+clients/sockets.
+
+Rescheduling a 10000 functions 20 times with an interval of 50ms (see
+`bench.js`), with 100 repetitions:
+
+* `benchSetTimeout*100: 40.295s`
+* `benchRetimer*100: 36.122s`
+
+
+## Install
+
+```
+npm install retimer --save
+```
+
+## Example
+
+```js
+var retimer = require('retimer')
+var timer = retimer(function () {
+  throw new Error('this should never get called!')
+}, 20)
+
+setTimeout(function () {
+  timer.reschedule(50)
+  setTimeout(function () {
+    timer.clear()
+  }, 10)
+}, 10)
+```
+
+## API
+
+### retimer(callback, timeout, [...args])
+
+Exactly like your beloved `setTimeout`.
+Returns a `Retimer object`
+
+### timer.reschedule(timeout)
+
+Reschedule the timer.
+Retimer will not gove any performance benefit if the specified timeout comes __before__ the original timeout.
+
+### timer.clear()
+
+Clear the timer, like your beloved `clearTimeout`.
+
+## How it works
+
+Timers are stored in a Linked List in node.js, if you create a lot of
+timers this Linked List becomes massive which makes __removing a timer an expensive operation__.
+Retimer let the old timer run at its time, and schedule a new one accordingly, when the new one is __after__ the original timeout.
+There is no performance gain when the new timeout is before the original one as retimer will just __remove the previous timer__.
+
+## License
+
+MIT
diff --git a/mqtt-backend/node_modules/retimer/bench.js b/mqtt-backend/node_modules/retimer/bench.js
new file mode 100644
index 0000000..caac5cb
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/bench.js
@@ -0,0 +1,67 @@
+'use strict'
+
+/* eslint-disable no-var */
+
+const bench = require('fastbench')
+const retimer = require('./')
+const max = 10000
+
+function benchSetTimeout (done) {
+  const timers = new Array(max)
+  let completed = 0
+  let toReschedule = 20
+
+  schedule()
+
+  function complete () {
+    if (++completed === max) {
+      done()
+    }
+  }
+
+  function schedule () {
+    for (var i = 0; i < max; i++) {
+      if (timers[i]) {
+        clearTimeout(timers[i])
+      }
+      timers[i] = setTimeout(complete, 50)
+    }
+    if (--toReschedule > 0) {
+      setTimeout(schedule, 10)
+    }
+  }
+}
+
+function benchRetimer (done) {
+  const timers = new Array(max)
+  let completed = 0
+  let toReschedule = 20
+
+  schedule()
+
+  function complete () {
+    if (++completed === max) {
+      done()
+    }
+  }
+
+  function schedule () {
+    for (var i = 0; i < max; i++) {
+      if (timers[i]) {
+        timers[i].reschedule(50)
+      } else {
+        timers[i] = retimer(complete, 50)
+      }
+    }
+    if (--toReschedule > 0) {
+      setTimeout(schedule, 10)
+    }
+  }
+}
+
+const run = bench([
+  benchSetTimeout,
+  benchRetimer
+], 100)
+
+run(run)
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/LICENSE b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/LICENSE
new file mode 100644
index 0000000..00c914d
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023 Christoph Guttandin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/README.md b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/README.md
new file mode 100644
index 0000000..0dd25eb
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/README.md
@@ -0,0 +1,51 @@
+# fast-unique-numbers
+
+**A module to create a set of unique numbers as fast as possible.**
+
+[![version](https://img.shields.io/npm/v/fast-unique-numbers.svg?style=flat-square)](https://www.npmjs.com/package/fast-unique-numbers)
+
+This module is meant to create unique numbers within a given [Map](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map) or [Set](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Set). To achieve that as fast as possible the resulting set of numbers will only contain integers. Additionally only small integers will be used for as long as possible. Small integers can be stored more efficiently by JavaScript engines like [SpiderMonkey](https://spidermonkey.dev/) or [V8](https://v8.dev).
+
+To verify the expected perfomance benefit an expectation test is used to make sure small integers do actually perform better in Chromium based browsers, Firefox and when using Node.js.
+
+## Usage
+
+This module is available on [npm](https://www.npmjs.com/package/fast-unique-numbers) and can be
+installed by running the following command:
+
+```shell
+npm install fast-unique-numbers
+```
+
+This module exports two functions.
+
+### addUniqueNumber()
+
+This function takes a `Set` of numbers as argument and appends a new unique number to it. It also returns that number.
+
+```js
+import { addUniqueNumber } from 'fast-unique-numbers';
+
+const set = new Set([1, 4, 8]);
+const uniqueNumber = addUniqueNumber(set);
+
+console.log(uniqueNumber); // 3
+console.log(set); // Set(4) { 1, 4, 8, 3 }
+```
+
+### generateUniqueNumber()
+
+This function can be used to generate a unique number which is not yet present in the given `Set` or is no key in the given `Map`. The resulting number gets not appended. It only gets returned.
+
+```js
+import { generateUniqueNumber } from 'fast-unique-numbers';
+
+const map = new Map([
+    [1, 'something'],
+    [4, 'something else']
+]);
+
+const uniqueNumber = generateUniqueNumber(map);
+
+console.log(uniqueNumber); // 2
+```
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/package.json b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/package.json
new file mode 100644
index 0000000..06d1402
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/package.json
@@ -0,0 +1,94 @@
+{
+    "author": "Christoph Guttandin",
+    "browser": "build/es5/bundle.js",
+    "bugs": {
+        "url": "https://github.com/chrisguttandin/fast-unique-numbers/issues"
+    },
+    "config": {
+        "commitizen": {
+            "path": "cz-conventional-changelog"
+        }
+    },
+    "dependencies": {
+        "@babel/runtime": "^7.23.8",
+        "tslib": "^2.6.2"
+    },
+    "description": "A module to create a set of unique numbers as fast as possible.",
+    "devDependencies": {
+        "@babel/cli": "^7.23.4",
+        "@babel/core": "^7.23.7",
+        "@babel/plugin-external-helpers": "^7.23.3",
+        "@babel/plugin-transform-runtime": "^7.23.7",
+        "@babel/preset-env": "^7.23.8",
+        "@babel/register": "^7.23.7",
+        "@commitlint/cli": "^17.8.0",
+        "@commitlint/config-angular": "^17.8.0",
+        "@rollup/plugin-babel": "^6.0.4",
+        "chai": "^4.3.10",
+        "commitizen": "^4.3.0",
+        "cz-conventional-changelog": "^3.3.0",
+        "eslint": "^8.56.0",
+        "eslint-config-holy-grail": "^57.2.27",
+        "grunt": "^1.6.1",
+        "grunt-cli": "^1.4.3",
+        "grunt-sh": "^0.2.1",
+        "husky": "^8.0.3",
+        "karma": "^6.4.2",
+        "karma-browserstack-launcher": "^1.6.0",
+        "karma-chrome-launcher": "^3.2.0",
+        "karma-firefox-launcher": "^2.1.2",
+        "karma-mocha": "^2.0.1",
+        "karma-sinon-chai": "^2.0.2",
+        "karma-webkit-launcher": "^2.4.0",
+        "karma-webpack": "^5.0.0",
+        "lint-staged": "^15.2.0",
+        "load-grunt-config": "^4.0.1",
+        "mocha": "^10.2.0",
+        "prettier": "^3.2.2",
+        "rimraf": "^5.0.5",
+        "rollup": "^4.9.5",
+        "sinon": "^17.0.1",
+        "sinon-chai": "^3.7.0",
+        "tinybench": "^2.6.0",
+        "ts-loader": "^9.5.1",
+        "tsconfig-holy-grail": "^14.0.8",
+        "tslint": "^6.1.3",
+        "tslint-config-holy-grail": "^55.0.5",
+        "typescript": "^5.3.3",
+        "webpack": "^5.89.0"
+    },
+    "engines": {
+        "node": ">=16.1.0"
+    },
+    "files": [
+        "build/es2019/",
+        "build/es5/",
+        "build/node/",
+        "src/"
+    ],
+    "homepage": "https://github.com/chrisguttandin/fast-unique-numbers",
+    "keywords": [
+        "performance",
+        "speed"
+    ],
+    "license": "MIT",
+    "main": "build/node/module.js",
+    "module": "build/es2019/module.js",
+    "name": "fast-unique-numbers",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/chrisguttandin/fast-unique-numbers.git"
+    },
+    "scripts": {
+        "build": "rimraf build/* && tsc --project src/tsconfig.json && rollup --config config/rollup/bundle.mjs && babel ./build/es2019 --config-file ./config/babel/build.json --out-dir ./build/node",
+        "lint": "npm run lint:config && npm run lint:src && npm run lint:test",
+        "lint:config": "eslint --config config/eslint/config.json --ext .js --report-unused-disable-directives config/",
+        "lint:src": "tslint --config config/tslint/src.json --project src/tsconfig.json src/*.ts src/**/*.ts",
+        "lint:test": "eslint --config config/eslint/test.json --ext .js --report-unused-disable-directives test/",
+        "prepare": "husky install",
+        "prepublishOnly": "npm run build",
+        "test": "grunt lint && grunt test"
+    },
+    "types": "build/es2019/module.d.ts",
+    "version": "8.0.13"
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/factories/add-unique-number.ts b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/factories/add-unique-number.ts
new file mode 100644
index 0000000..1192e45
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/factories/add-unique-number.ts
@@ -0,0 +1,11 @@
+import { TAddUniqueNumberFactory } from '../types';
+
+export const createAddUniqueNumber: TAddUniqueNumberFactory = (generateUniqueNumber) => {
+    return (set) => {
+        const number = generateUniqueNumber(set);
+
+        set.add(number);
+
+        return number;
+    };
+};
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/factories/cache.ts b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/factories/cache.ts
new file mode 100644
index 0000000..a7154b3
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/factories/cache.ts
@@ -0,0 +1,9 @@
+import { TCacheFactory } from '../types';
+
+export const createCache: TCacheFactory = (lastNumberWeakMap) => {
+    return (collection, nextNumber) => {
+        lastNumberWeakMap.set(collection, nextNumber);
+
+        return nextNumber;
+    };
+};
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/factories/generate-unique-number.ts b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/factories/generate-unique-number.ts
new file mode 100644
index 0000000..10594b8
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/factories/generate-unique-number.ts
@@ -0,0 +1,55 @@
+import { TGenerateUniqueNumberFactory } from '../types';
+
+/*
+ * The value of the constant Number.MAX_SAFE_INTEGER equals (2 ** 53 - 1) but it
+ * is fairly new.
+ */
+const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER === undefined ? 9007199254740991 : Number.MAX_SAFE_INTEGER;
+const TWO_TO_THE_POWER_OF_TWENTY_NINE = 536870912;
+const TWO_TO_THE_POWER_OF_THIRTY = TWO_TO_THE_POWER_OF_TWENTY_NINE * 2;
+
+export const createGenerateUniqueNumber: TGenerateUniqueNumberFactory = (cache, lastNumberWeakMap) => {
+    return (collection) => {
+        const lastNumber = lastNumberWeakMap.get(collection);
+
+        /*
+         * Let's try the cheapest algorithm first. It might fail to produce a new
+         * number, but it is so cheap that it is okay to take the risk. Just
+         * increase the last number by one or reset it to 0 if we reached the upper
+         * bound of SMIs (which stands for small integers). When the last number is
+         * unknown it is assumed that the collection contains zero based consecutive
+         * numbers.
+         */
+        let nextNumber = lastNumber === undefined ? collection.size : lastNumber < TWO_TO_THE_POWER_OF_THIRTY ? lastNumber + 1 : 0;
+
+        if (!collection.has(nextNumber)) {
+            return cache(collection, nextNumber);
+        }
+
+        /*
+         * If there are less than half of 2 ** 30 numbers stored in the collection,
+         * the chance to generate a new random number in the range from 0 to 2 ** 30
+         * is at least 50%. It's benifitial to use only SMIs because they perform
+         * much better in any environment based on V8.
+         */
+        if (collection.size < TWO_TO_THE_POWER_OF_TWENTY_NINE) {
+            while (collection.has(nextNumber)) {
+                nextNumber = Math.floor(Math.random() * TWO_TO_THE_POWER_OF_THIRTY);
+            }
+
+            return cache(collection, nextNumber);
+        }
+
+        // Quickly check if there is a theoretical chance to generate a new number.
+        if (collection.size > MAX_SAFE_INTEGER) {
+            throw new Error('Congratulations, you created a collection of unique numbers which uses all available integers!');
+        }
+
+        // Otherwise use the full scale of safely usable integers.
+        while (collection.has(nextNumber)) {
+            nextNumber = Math.floor(Math.random() * MAX_SAFE_INTEGER);
+        }
+
+        return cache(collection, nextNumber);
+    };
+};
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/module.ts b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/module.ts
new file mode 100644
index 0000000..3f9e731
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/module.ts
@@ -0,0 +1,17 @@
+import { createAddUniqueNumber } from './factories/add-unique-number';
+import { createCache } from './factories/cache';
+import { createGenerateUniqueNumber } from './factories/generate-unique-number';
+
+/*
+ * @todo Explicitly referencing the barrel file seems to be necessary when enabling the
+ * isolatedModules compiler option.
+ */
+export * from './types/index';
+
+const LAST_NUMBER_WEAK_MAP = new WeakMap<Map<number, any> | Set<number>, number>();
+
+const cache = createCache(LAST_NUMBER_WEAK_MAP);
+const generateUniqueNumber = createGenerateUniqueNumber(cache, LAST_NUMBER_WEAK_MAP);
+const addUniqueNumber = createAddUniqueNumber(generateUniqueNumber);
+
+export { addUniqueNumber, generateUniqueNumber };
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/tsconfig.json b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/tsconfig.json
new file mode 100644
index 0000000..d10f129
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/tsconfig.json
@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "isolatedModules": true
+    },
+    "extends": "tsconfig-holy-grail/src/tsconfig-universal"
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/add-unique-number-factory.ts b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/add-unique-number-factory.ts
new file mode 100644
index 0000000..dbe1163
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/add-unique-number-factory.ts
@@ -0,0 +1,4 @@
+import { TAddUniqueNumberFunction } from './add-unique-number-function';
+import { TGenerateUniqueNumberFunction } from './generate-unique-number-function';
+
+export type TAddUniqueNumberFactory = (generateUniqueNumber: TGenerateUniqueNumberFunction) => TAddUniqueNumberFunction;
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/add-unique-number-function.ts b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/add-unique-number-function.ts
new file mode 100644
index 0000000..4fc7a79
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/add-unique-number-function.ts
@@ -0,0 +1 @@
+export type TAddUniqueNumberFunction = (set: Set<number>) => number;
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/cache-factory.ts b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/cache-factory.ts
new file mode 100644
index 0000000..2926d1b
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/cache-factory.ts
@@ -0,0 +1,3 @@
+import { TCacheFunction } from './cache-function';
+
+export type TCacheFactory = (lastNumberWeakMap: WeakMap<Map<number, any> | Set<number>, number>) => TCacheFunction;
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/cache-function.ts b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/cache-function.ts
new file mode 100644
index 0000000..e4ef9f2
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/cache-function.ts
@@ -0,0 +1 @@
+export type TCacheFunction = (collection: Map<number, any> | Set<number>, nextNumber: number) => number;
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/generate-unique-number-factory.ts b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/generate-unique-number-factory.ts
new file mode 100644
index 0000000..54c1513
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/generate-unique-number-factory.ts
@@ -0,0 +1,7 @@
+import { TCacheFunction } from './cache-function';
+import { TGenerateUniqueNumberFunction } from './generate-unique-number-function';
+
+export type TGenerateUniqueNumberFactory = (
+    cache: TCacheFunction,
+    lastNumberWeakMap: WeakMap<Map<number, any> | Set<number>, number>
+) => TGenerateUniqueNumberFunction;
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/generate-unique-number-function.ts b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/generate-unique-number-function.ts
new file mode 100644
index 0000000..2bc2081
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/generate-unique-number-function.ts
@@ -0,0 +1 @@
+export type TGenerateUniqueNumberFunction = (collection: Map<number, any> | Set<number>) => number;
diff --git a/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/index.ts b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/index.ts
new file mode 100644
index 0000000..ceb4d7e
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/fast-unique-numbers/src/types/index.ts
@@ -0,0 +1,6 @@
+export * from './add-unique-number-factory';
+export * from './add-unique-number-function';
+export * from './cache-factory';
+export * from './cache-function';
+export * from './generate-unique-number-factory';
+export * from './generate-unique-number-function';
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/LICENSE b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/LICENSE
new file mode 100644
index 0000000..470f893
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Christoph Guttandin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/README.md b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/README.md
new file mode 100644
index 0000000..5ab0180
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/README.md
@@ -0,0 +1,5 @@
+# worker-timers-broker
+
+**The broker which is used by the worker-timers package.**
+
+[![version](https://img.shields.io/npm/v/worker-timers-broker.svg?style=flat-square)](https://www.npmjs.com/package/worker-timers-broker)
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/package.json b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/package.json
new file mode 100644
index 0000000..d61a388
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/package.json
@@ -0,0 +1,84 @@
+{
+    "author": "Christoph Guttandin",
+    "bugs": {
+        "url": "https://github.com/chrisguttandin/worker-timers-broker/issues"
+    },
+    "config": {
+        "commitizen": {
+            "path": "cz-conventional-changelog"
+        }
+    },
+    "dependencies": {
+        "@babel/runtime": "^7.24.5",
+        "fast-unique-numbers": "^8.0.13",
+        "tslib": "^2.6.2",
+        "worker-timers-worker": "^7.0.71"
+    },
+    "description": "The broker which is used by the worker-timers package.",
+    "devDependencies": {
+        "@babel/core": "^7.24.5",
+        "@babel/plugin-external-helpers": "^7.24.1",
+        "@babel/plugin-transform-runtime": "^7.24.3",
+        "@babel/preset-env": "^7.24.5",
+        "@commitlint/cli": "^19.3.0",
+        "@commitlint/config-angular": "^19.3.0",
+        "@rollup/plugin-babel": "^6.0.4",
+        "chai": "^4.3.10",
+        "commitizen": "^4.3.0",
+        "cz-conventional-changelog": "^3.3.0",
+        "eslint": "^8.57.0",
+        "eslint-config-holy-grail": "^59.0.8",
+        "grunt": "^1.6.1",
+        "grunt-cli": "^1.4.3",
+        "grunt-sh": "^0.2.1",
+        "husky": "^8.0.3",
+        "karma": "^6.4.3",
+        "karma-chrome-launcher": "^3.2.0",
+        "karma-firefox-launcher": "^2.1.3",
+        "karma-mocha": "^2.0.1",
+        "karma-sauce-launcher": "^4.3.6",
+        "karma-sinon-chai": "^2.0.2",
+        "karma-webkit-launcher": "^2.4.0",
+        "karma-webpack": "^5.0.1",
+        "lint-staged": "^15.2.2",
+        "load-grunt-config": "^4.0.1",
+        "mocha": "^10.4.0",
+        "prettier": "^3.2.5",
+        "rimraf": "^5.0.5",
+        "rollup": "^4.17.2",
+        "sinon": "^17.0.1",
+        "sinon-chai": "^3.7.0",
+        "ts-loader": "^9.5.1",
+        "tsconfig-holy-grail": "^15.0.1",
+        "tslint": "^6.1.3",
+        "tslint-config-holy-grail": "^56.0.1",
+        "typescript": "^5.4.5",
+        "webpack": "^5.91.0"
+    },
+    "files": [
+        "build/es2019/",
+        "build/es5/",
+        "src/"
+    ],
+    "homepage": "https://github.com/chrisguttandin/worker-timers-broker",
+    "license": "MIT",
+    "main": "build/es5/bundle.js",
+    "module": "build/es2019/module.js",
+    "name": "worker-timers-broker",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/chrisguttandin/worker-timers-broker.git"
+    },
+    "scripts": {
+        "build": "rimraf build/* && tsc --project src/tsconfig.json && rollup --config config/rollup/bundle.mjs",
+        "lint": "npm run lint:config && npm run lint:src && npm run lint:test",
+        "lint:config": "eslint --config config/eslint/config.json --ext .js --report-unused-disable-directives config/",
+        "lint:src": "tslint --config config/tslint/src.json --project src/tsconfig.json src/*.ts src/**/*.ts",
+        "lint:test": "eslint --config config/eslint/test.json --ext .js --report-unused-disable-directives test/",
+        "prepare": "husky install",
+        "prepublishOnly": "npm run build",
+        "test": "grunt lint && grunt test"
+    },
+    "types": "build/es2019/module.d.ts",
+    "version": "6.1.8"
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/guards/call-notification.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/guards/call-notification.ts
new file mode 100644
index 0000000..7bc9dc2
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/guards/call-notification.ts
@@ -0,0 +1,5 @@
+import { ICallNotification, TWorkerMessage } from 'worker-timers-worker';
+
+export const isCallNotification = (message: TWorkerMessage): message is ICallNotification => {
+    return (<ICallNotification>message).method !== undefined && (<ICallNotification>message).method === 'call';
+};
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/guards/clear-response.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/guards/clear-response.ts
new file mode 100644
index 0000000..cdc1a5d
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/guards/clear-response.ts
@@ -0,0 +1,5 @@
+import { IClearResponse, TWorkerMessage } from 'worker-timers-worker';
+
+export const isClearResponse = (message: TWorkerMessage): message is IClearResponse => {
+    return (<IClearResponse>message).error === null && typeof message.id === 'number';
+};
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/module.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/module.ts
new file mode 100644
index 0000000..550c8ea
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/module.ts
@@ -0,0 +1,173 @@
+import { generateUniqueNumber } from 'fast-unique-numbers';
+import { IClearRequest, ISetNotification, IWorkerEvent, TTimerType } from 'worker-timers-worker';
+import { isCallNotification } from './guards/call-notification';
+import { isClearResponse } from './guards/clear-response';
+
+export const load = (url: string) => {
+    // Prefilling the Maps with a function indexed by zero is necessary to be compliant with the specification.
+    const scheduledIntervalFunctions: Map<number, number | Function> = new Map([[0, () => {}]]); // tslint:disable-line no-empty
+    const scheduledTimeoutFunctions: Map<number, number | Function> = new Map([[0, () => {}]]); // tslint:disable-line no-empty
+    const unrespondedRequests: Map<number, { timerId: number; timerType: TTimerType }> = new Map();
+
+    const worker = new Worker(url);
+
+    worker.addEventListener('message', ({ data }: IWorkerEvent) => {
+        if (isCallNotification(data)) {
+            const {
+                params: { timerId, timerType }
+            } = data;
+
+            if (timerType === 'interval') {
+                const idOrFunc = scheduledIntervalFunctions.get(timerId);
+
+                if (typeof idOrFunc === 'number') {
+                    const timerIdAndTimerType = unrespondedRequests.get(idOrFunc);
+
+                    if (
+                        timerIdAndTimerType === undefined ||
+                        timerIdAndTimerType.timerId !== timerId ||
+                        timerIdAndTimerType.timerType !== timerType
+                    ) {
+                        throw new Error('The timer is in an undefined state.');
+                    }
+                } else if (typeof idOrFunc !== 'undefined') {
+                    idOrFunc();
+                } else {
+                    throw new Error('The timer is in an undefined state.');
+                }
+            } else if (timerType === 'timeout') {
+                const idOrFunc = scheduledTimeoutFunctions.get(timerId);
+
+                if (typeof idOrFunc === 'number') {
+                    const timerIdAndTimerType = unrespondedRequests.get(idOrFunc);
+
+                    if (
+                        timerIdAndTimerType === undefined ||
+                        timerIdAndTimerType.timerId !== timerId ||
+                        timerIdAndTimerType.timerType !== timerType
+                    ) {
+                        throw new Error('The timer is in an undefined state.');
+                    }
+                } else if (typeof idOrFunc !== 'undefined') {
+                    idOrFunc();
+
+                    // A timeout can be savely deleted because it is only called once.
+                    scheduledTimeoutFunctions.delete(timerId);
+                } else {
+                    throw new Error('The timer is in an undefined state.');
+                }
+            }
+        } else if (isClearResponse(data)) {
+            const { id } = data;
+
+            const timerIdAndTimerType = unrespondedRequests.get(id);
+
+            if (timerIdAndTimerType === undefined) {
+                throw new Error('The timer is in an undefined state.');
+            }
+
+            const { timerId, timerType } = timerIdAndTimerType;
+
+            unrespondedRequests.delete(id);
+
+            if (timerType === 'interval') {
+                scheduledIntervalFunctions.delete(timerId);
+            } else {
+                scheduledTimeoutFunctions.delete(timerId);
+            }
+        } else {
+            const {
+                error: { message }
+            } = data;
+
+            throw new Error(message);
+        }
+    });
+
+    const clearInterval = (timerId: number) => {
+        const id = generateUniqueNumber(unrespondedRequests);
+
+        unrespondedRequests.set(id, { timerId, timerType: 'interval' });
+        scheduledIntervalFunctions.set(timerId, id);
+
+        worker.postMessage(<IClearRequest>{
+            id,
+            method: 'clear',
+            params: { timerId, timerType: 'interval' }
+        });
+    };
+
+    const clearTimeout = (timerId: number) => {
+        const id = generateUniqueNumber(unrespondedRequests);
+
+        unrespondedRequests.set(id, { timerId, timerType: 'timeout' });
+        scheduledTimeoutFunctions.set(timerId, id);
+
+        worker.postMessage(<IClearRequest>{
+            id,
+            method: 'clear',
+            params: { timerId, timerType: 'timeout' }
+        });
+    };
+
+    const setInterval = (func: Function, delay = 0) => {
+        const timerId = generateUniqueNumber(scheduledIntervalFunctions);
+
+        scheduledIntervalFunctions.set(timerId, () => {
+            func();
+
+            // Doublecheck if the interval should still be rescheduled because it could have been cleared inside of func().
+            if (typeof scheduledIntervalFunctions.get(timerId) === 'function') {
+                worker.postMessage(<ISetNotification>{
+                    id: null,
+                    method: 'set',
+                    params: {
+                        delay,
+                        now: performance.now(),
+                        timerId,
+                        timerType: 'interval'
+                    }
+                });
+            }
+        });
+
+        worker.postMessage(<ISetNotification>{
+            id: null,
+            method: 'set',
+            params: {
+                delay,
+                now: performance.now(),
+                timerId,
+                timerType: 'interval'
+            }
+        });
+
+        return timerId;
+    };
+
+    const setTimeout = (func: Function, delay = 0) => {
+        const timerId = generateUniqueNumber(scheduledTimeoutFunctions);
+
+        scheduledTimeoutFunctions.set(timerId, func);
+
+        worker.postMessage(<ISetNotification>{
+            id: null,
+            method: 'set',
+            params: {
+                delay,
+                now: performance.now(),
+                timerId,
+                timerType: 'timeout'
+            }
+        });
+
+        return timerId;
+    };
+
+    return {
+        clearInterval,
+        clearTimeout,
+        setInterval,
+        setTimeout
+    };
+};
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/tsconfig.json b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/tsconfig.json
new file mode 100644
index 0000000..53941c6
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-broker/src/tsconfig.json
@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "isolatedModules": true
+    },
+    "extends": "tsconfig-holy-grail/src/tsconfig-browser"
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/LICENSE b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/LICENSE
new file mode 100644
index 0000000..470f893
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Christoph Guttandin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/README.md b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/README.md
new file mode 100644
index 0000000..46748ea
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/README.md
@@ -0,0 +1,5 @@
+# worker-timers-worker
+
+**The worker which is used by the worker-timers package.**
+
+[![version](https://img.shields.io/npm/v/worker-timers-worker.svg?style=flat-square)](https://www.npmjs.com/package/worker-timers-worker)
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/package.json b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/package.json
new file mode 100644
index 0000000..a511b56
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/package.json
@@ -0,0 +1,91 @@
+{
+    "author": "Christoph Guttandin",
+    "bugs": {
+        "url": "https://github.com/chrisguttandin/worker-timers-worker/issues"
+    },
+    "config": {
+        "commitizen": {
+            "path": "cz-conventional-changelog"
+        }
+    },
+    "contributors": [
+        {
+            "email": "vac872089248@gmail.com",
+            "name": "Knissing"
+        }
+    ],
+    "dependencies": {
+        "@babel/runtime": "^7.24.5",
+        "tslib": "^2.6.2"
+    },
+    "description": "The worker which is used by the worker-timers package.",
+    "devDependencies": {
+        "@babel/core": "^7.24.5",
+        "@babel/plugin-external-helpers": "^7.24.1",
+        "@babel/plugin-transform-runtime": "^7.24.3",
+        "@babel/preset-env": "^7.24.5",
+        "@commitlint/cli": "^19.3.0",
+        "@commitlint/config-angular": "^19.3.0",
+        "@rollup/plugin-babel": "^6.0.4",
+        "chai": "^4.3.10",
+        "commitizen": "^4.3.0",
+        "cz-conventional-changelog": "^3.3.0",
+        "eslint": "^8.57.0",
+        "eslint-config-holy-grail": "^59.0.8",
+        "grunt": "^1.6.1",
+        "grunt-cli": "^1.4.3",
+        "grunt-sh": "^0.2.1",
+        "husky": "^8.0.3",
+        "karma": "^6.4.3",
+        "karma-browserstack-launcher": "^1.6.0",
+        "karma-chrome-launcher": "^3.2.0",
+        "karma-cli": "^2.0.0",
+        "karma-firefox-launcher": "^2.1.3",
+        "karma-mocha": "^2.0.1",
+        "karma-mocha-webworker": "^1.3.0",
+        "karma-sinon-chai": "^2.0.2",
+        "karma-webkit-launcher": "^2.4.0",
+        "karma-webpack": "^5.0.1",
+        "lint-staged": "^15.2.2",
+        "load-grunt-config": "^4.0.1",
+        "memory-fs": "^0.5.0",
+        "mocha": "^10.4.0",
+        "prettier": "^3.2.5",
+        "rimraf": "^5.0.5",
+        "rollup": "^4.17.2",
+        "sinon": "^17.0.1",
+        "sinon-chai": "^3.7.0",
+        "ts-loader": "^9.5.1",
+        "tsconfig-holy-grail": "^15.0.1",
+        "tslint": "^6.1.3",
+        "tslint-config-holy-grail": "^56.0.1",
+        "typescript": "^5.4.5",
+        "webpack": "^5.91.0"
+    },
+    "files": [
+        "build/es2019/",
+        "build/es5/",
+        "src/"
+    ],
+    "homepage": "https://github.com/chrisguttandin/worker-timers-worker",
+    "license": "MIT",
+    "main": "build/es5/bundle.js",
+    "module": "build/es2019/module.js",
+    "name": "worker-timers-worker",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/chrisguttandin/worker-timers-worker.git"
+    },
+    "scripts": {
+        "build": "rimraf build/* && tsc --project src/tsconfig.json && rollup --config config/rollup/bundle.mjs",
+        "lint": "npm run lint:config && npm run lint:src && npm run lint:test",
+        "lint:config": "eslint --config config/eslint/config.json --ext .js --report-unused-disable-directives config/",
+        "lint:src": "tslint --config config/tslint/src.json --project src/tsconfig.json src/*.ts src/**/*.ts",
+        "lint:test": "eslint --config config/eslint/test.json --ext .js --report-unused-disable-directives test/",
+        "prepare": "husky install",
+        "prepublishOnly": "npm run build",
+        "test": "grunt lint && grunt test"
+    },
+    "types": "build/es2019/module.d.ts",
+    "version": "7.0.71"
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/helpers/timer.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/helpers/timer.ts
new file mode 100644
index 0000000..07eabd1
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/helpers/timer.ts
@@ -0,0 +1,68 @@
+import { ICallNotification } from '../interfaces';
+
+const scheduledIntervalIdentifiers: Map<number, number> = new Map();
+const scheduledTimeoutIdentifiers: Map<number, number> = new Map();
+
+export const clearScheduledInterval = (timerId: number) => {
+    const identifier = scheduledIntervalIdentifiers.get(timerId);
+
+    if (identifier !== undefined) {
+        clearTimeout(identifier);
+        scheduledIntervalIdentifiers.delete(timerId);
+    } else {
+        throw new Error(`There is no interval scheduled with the given id "${timerId}".`);
+    }
+};
+
+export const clearScheduledTimeout = (timerId: number) => {
+    const identifier = scheduledTimeoutIdentifiers.get(timerId);
+
+    if (identifier !== undefined) {
+        clearTimeout(identifier);
+        scheduledTimeoutIdentifiers.delete(timerId);
+    } else {
+        throw new Error(`There is no timeout scheduled with the given id "${timerId}".`);
+    }
+};
+
+const computeDelayAndExpectedCallbackTime = (delay: number, nowInMainThread: number) => {
+    let now: number;
+    let remainingDelay: number;
+    const nowInWorker = performance.now();
+    const elapsed = Math.max(0, nowInWorker - nowInMainThread);
+
+    now = nowInWorker;
+    remainingDelay = delay - elapsed;
+
+    const expected = now + remainingDelay;
+
+    return { expected, remainingDelay };
+};
+
+const setTimeoutCallback = (identifiers: Map<number, number>, timerId: number, expected: number, timerType: string) => {
+    const now = performance.now();
+
+    if (now > expected) {
+        postMessage(<ICallNotification>{ id: null, method: 'call', params: { timerId, timerType } });
+    } else {
+        identifiers.set(timerId, setTimeout(setTimeoutCallback, expected - now, identifiers, timerId, expected, timerType));
+    }
+};
+
+export const scheduleInterval = (delay: number, timerId: number, nowInMainThread: number) => {
+    const { expected, remainingDelay } = computeDelayAndExpectedCallbackTime(delay, nowInMainThread);
+
+    scheduledIntervalIdentifiers.set(
+        timerId,
+        setTimeout(setTimeoutCallback, remainingDelay, scheduledIntervalIdentifiers, timerId, expected, 'interval')
+    );
+};
+
+export const scheduleTimeout = (delay: number, timerId: number, nowInMainThread: number) => {
+    const { expected, remainingDelay } = computeDelayAndExpectedCallbackTime(delay, nowInMainThread);
+
+    scheduledTimeoutIdentifiers.set(
+        timerId,
+        setTimeout(setTimeoutCallback, remainingDelay, scheduledTimeoutIdentifiers, timerId, expected, 'timeout')
+    );
+};
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/broker-event.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/broker-event.ts
new file mode 100644
index 0000000..46c9a70
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/broker-event.ts
@@ -0,0 +1,5 @@
+import { TBrokerMessage } from '../types';
+
+export interface IBrokerEvent extends Event {
+    data: TBrokerMessage;
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/call-notification.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/call-notification.ts
new file mode 100644
index 0000000..3977860
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/call-notification.ts
@@ -0,0 +1,13 @@
+import { TTimerType } from '../types';
+
+export interface ICallNotification {
+    id: null;
+
+    method: 'call';
+
+    params: {
+        timerId: number;
+
+        timerType: TTimerType;
+    };
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/clear-request.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/clear-request.ts
new file mode 100644
index 0000000..07aca43
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/clear-request.ts
@@ -0,0 +1,13 @@
+import { TTimerType } from '../types';
+
+export interface IClearRequest {
+    id: number;
+
+    method: 'clear';
+
+    params: {
+        timerId: number;
+
+        timerType: TTimerType;
+    };
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/clear-response.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/clear-response.ts
new file mode 100644
index 0000000..e680690
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/clear-response.ts
@@ -0,0 +1,5 @@
+export interface IClearResponse {
+    error: null;
+
+    id: number;
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/error-notification.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/error-notification.ts
new file mode 100644
index 0000000..ed4b29e
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/error-notification.ts
@@ -0,0 +1,9 @@
+export interface IErrorNotification {
+    error: {
+        message: string;
+    };
+
+    id: null;
+
+    result: null;
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/error-response.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/error-response.ts
new file mode 100644
index 0000000..2d5ed7f
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/error-response.ts
@@ -0,0 +1,9 @@
+export interface IErrorResponse {
+    error: {
+        message: string;
+    };
+
+    id: number;
+
+    result: null;
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/index.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/index.ts
new file mode 100644
index 0000000..ec82b35
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/index.ts
@@ -0,0 +1,8 @@
+export * from './broker-event';
+export * from './call-notification';
+export * from './clear-request';
+export * from './clear-response';
+export * from './error-notification';
+export * from './error-response';
+export * from './set-notification';
+export * from './worker-event';
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/set-notification.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/set-notification.ts
new file mode 100644
index 0000000..fa60f87
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/set-notification.ts
@@ -0,0 +1,17 @@
+import { TTimerType } from '../types';
+
+export interface ISetNotification {
+    id: null;
+
+    method: 'set';
+
+    params: {
+        delay: number;
+
+        now: number;
+
+        timerId: number;
+
+        timerType: TTimerType;
+    };
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/worker-event.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/worker-event.ts
new file mode 100644
index 0000000..0a32ca6
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/interfaces/worker-event.ts
@@ -0,0 +1,5 @@
+import { TWorkerMessage } from '../types';
+
+export interface IWorkerEvent extends Event {
+    data: TWorkerMessage;
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/module.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/module.ts
new file mode 100644
index 0000000..1115ec6
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/module.ts
@@ -0,0 +1,54 @@
+import { clearScheduledInterval, clearScheduledTimeout, scheduleInterval, scheduleTimeout } from './helpers/timer';
+import { IBrokerEvent, IClearResponse, IErrorNotification, IErrorResponse } from './interfaces';
+
+/*
+ * @todo Explicitly referencing the barrel file seems to be necessary when enabling the
+ * isolatedModules compiler option.
+ */
+export * from './interfaces/index';
+export * from './types/index';
+
+addEventListener('message', ({ data }: IBrokerEvent) => {
+    try {
+        if (data.method === 'clear') {
+            const {
+                id,
+                params: { timerId, timerType }
+            } = data;
+
+            if (timerType === 'interval') {
+                clearScheduledInterval(timerId);
+
+                postMessage(<IClearResponse>{ error: null, id });
+            } else if (timerType === 'timeout') {
+                clearScheduledTimeout(timerId);
+
+                postMessage(<IClearResponse>{ error: null, id });
+            } else {
+                throw new Error(`The given type "${timerType}" is not supported`);
+            }
+        } else if (data.method === 'set') {
+            const {
+                params: { delay, now, timerId, timerType }
+            } = data;
+
+            if (timerType === 'interval') {
+                scheduleInterval(delay, timerId, now);
+            } else if (timerType === 'timeout') {
+                scheduleTimeout(delay, timerId, now);
+            } else {
+                throw new Error(`The given type "${timerType}" is not supported`);
+            }
+        } else {
+            throw new Error(`The given method "${(<any>data).method}" is not supported`);
+        }
+    } catch (err) {
+        postMessage(<IErrorNotification | IErrorResponse>{
+            error: {
+                message: err.message
+            },
+            id: data.id,
+            result: null
+        });
+    }
+});
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/tsconfig.json b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/tsconfig.json
new file mode 100644
index 0000000..1dc2a50
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/tsconfig.json
@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "isolatedModules": true
+    },
+    "extends": "tsconfig-holy-grail/src/tsconfig-web-worker"
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/broker-message.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/broker-message.ts
new file mode 100644
index 0000000..f61f059
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/broker-message.ts
@@ -0,0 +1,3 @@
+import { IClearRequest, ISetNotification } from '../interfaces';
+
+export type TBrokerMessage = IClearRequest | ISetNotification;
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/index.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/index.ts
new file mode 100644
index 0000000..120d048
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/index.ts
@@ -0,0 +1,3 @@
+export * from './broker-message';
+export * from './timer-type';
+export * from './worker-message';
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/timer-type.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/timer-type.ts
new file mode 100644
index 0000000..2a2c650
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/timer-type.ts
@@ -0,0 +1 @@
+export type TTimerType = 'interval' | 'timeout';
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/worker-message.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/worker-message.ts
new file mode 100644
index 0000000..3a7d818
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers-worker/src/types/worker-message.ts
@@ -0,0 +1,3 @@
+import { ICallNotification, IClearResponse, IErrorNotification, IErrorResponse } from '../interfaces';
+
+export type TWorkerMessage = ICallNotification | IClearResponse | IErrorNotification | IErrorResponse;
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers/LICENSE b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/LICENSE
new file mode 100644
index 0000000..470f893
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2024 Christoph Guttandin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers/README.md b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/README.md
new file mode 100644
index 0000000..36c8317
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/README.md
@@ -0,0 +1,79 @@
+![logo](https://repository-images.githubusercontent.com/24792198/dd93c980-323f-11ea-8a14-a0299de4847a)
+
+# worker-timers
+
+**A replacement for setInterval() and setTimeout() which works in unfocused windows.**
+
+[![version](https://img.shields.io/npm/v/worker-timers.svg?style=flat-square)](https://www.npmjs.com/package/worker-timers)
+
+## Motivation
+
+For scripts that rely on [WindowTimers](http://www.w3.org/TR/html5/webappapis.html#timers) like `setInterval()` or `setTimeout()` things get confusing when the site which the script is running on loses focus. Chrome, Firefox and maybe others throttle the frequency at which they invoke those timers to a maximum of once per second in such a situation. However this is only true for the main thread and does not affect the behavior of [Web Workers](http://www.w3.org/TR/workers/). Therefore it is possible to avoid the throttling by using a worker to do the actual scheduling. This is exactly what `worker-timers` does.
+
+## Getting Started
+
+`worker-timers` is available as a package on [npm](https://www.npmjs.org/package/worker-timers). Run the following command to install it:
+
+```shell
+npm install worker-timers
+```
+
+You can then import the exported functions in your code like this:
+
+```js
+import { clearInterval, clearTimeout, setInterval, setTimeout } from 'worker-timers';
+```
+
+The usage is exactly the same (despite of the [error handling](#error-handling) and the
+[differentiation between intervals and timeouts](#differentiation-between-intervals-and-timeouts))
+as with the corresponding functions on the global scope.
+
+```js
+var intervalId = setInterval(() => {
+    // do something many times
+}, 100);
+
+clearInterval(intervalId);
+
+var timeoutId = setTimeout(() => {
+    // do something once
+}, 100);
+
+clearTimeout(timeoutId);
+```
+
+## Error Handling
+
+The native WindowTimers are very forgiving. Calling `clearInterval()` or `clearTimeout()` without a value or with an id which doesn't exist will get ignored. In contrast to that `worker-timers` will throw an error when doing so.
+
+```js
+// This will return undefined.
+window.clearTimeout('not-a-timeout-id');
+
+// This will throw an error.
+clearTimeout('not-a-timeout-id');
+```
+
+## Differentiation between Intervals and Timeouts
+
+Another difference between `worker-timers` and WindowTimers is that this package maintains two separate lists to store the ids of intervals and timeouts internally. WindowTimers do only have one list which allows intervals to be cancelled by calling `clearTimeout()` and the other way round. This is not possible with `worker-timers`. As mentioned above `worker-timers` will throw an error when provided with an unknown id.
+
+```js
+const periodicWork = () => {};
+
+// This will stop the interval.
+const windowId = window.setInterval(periodicWork, 100);
+window.clearTimeout(windowId);
+
+// This will throw an error.
+const workerId = setInterval(periodicWork, 100);
+clearTimeout(workerId);
+```
+
+## Server-Side Rendering
+
+This package is intended to be used in the browser and requires the browser to have [support for Web Workers](https://caniuse.com/#feat=webworkers). It does not contain any fallback which would allow it to run in another environment like Node.js which doesn't know about Web Workers. This is to prevent this package from silently failing in an unsupported browser. But it also means that it needs to be replaced when used in a web project which also supports server-side rendering. The replacement should be straightforward, at least in theory, because each function has the exact same signature as its corresponding builtin function. But the configuration of a real-life project can be tricky. For a concrete example, please have a look at the [worker-timers-ssr-example](https://github.com/newyork-anthonyng/worker-timers-ssr-example) provided by [@newyork-anthonyng](https://github.com/newyork-anthonyng). It shows the usage inside of a server-side rendered React app.
+
+## Angular (& Zone.js)
+
+If `worker-timers` is used inside of an Angular app and Zone.js (which is the default) is used to detect changes, the behavior of `worker-timers` can be confusing. Angular is using Zone.js which is patching the native `setInterval()` and `setTimeout()` functions to get notified about the invocation of their callback functions. But Angular (more specifically Zone.js) is not aware of `worker-timers` and doesn't get notified about any callback invocations. Therefore Angular needs to be notified manually about state changes that occur inside of a callback function which was scheduled with the help of `worker-timers`.
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers/package.json b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/package.json
new file mode 100644
index 0000000..ddab2c8
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/package.json
@@ -0,0 +1,106 @@
+{
+    "author": "Christoph Guttandin",
+    "bugs": {
+        "url": "https://github.com/chrisguttandin/worker-timers/issues"
+    },
+    "config": {
+        "commitizen": {
+            "path": "cz-conventional-changelog"
+        }
+    },
+    "contributors": [
+        {
+            "email": "a-anng@expedia.com",
+            "name": "Anthony Ng"
+        }
+    ],
+    "dependencies": {
+        "@babel/runtime": "^7.24.5",
+        "tslib": "^2.6.2",
+        "worker-timers-broker": "^6.1.8",
+        "worker-timers-worker": "^7.0.71"
+    },
+    "description": "A replacement for setInterval() and setTimeout() which works in unfocused windows.",
+    "devDependencies": {
+        "@babel/cli": "^7.24.5",
+        "@babel/core": "^7.24.5",
+        "@babel/plugin-external-helpers": "^7.24.1",
+        "@babel/plugin-transform-runtime": "^7.24.3",
+        "@babel/preset-env": "^7.24.5",
+        "@babel/register": "^7.23.7",
+        "@commitlint/cli": "^19.3.0",
+        "@commitlint/config-angular": "^19.3.0",
+        "@rollup/plugin-babel": "^6.0.4",
+        "@rollup/plugin-replace": "^5.0.5",
+        "babel-loader": "^9.1.3",
+        "chai": "^4.3.10",
+        "commitizen": "^4.3.0",
+        "cz-conventional-changelog": "^3.3.0",
+        "eslint": "^8.57.0",
+        "eslint-config-holy-grail": "^59.0.8",
+        "grunt": "^1.6.1",
+        "grunt-cli": "^1.4.3",
+        "grunt-sh": "^0.2.1",
+        "husky": "^8.0.3",
+        "karma": "^6.4.3",
+        "karma-chrome-launcher": "^3.2.0",
+        "karma-firefox-launcher": "^2.1.3",
+        "karma-mocha": "^2.0.1",
+        "karma-sauce-launcher": "^4.3.6",
+        "karma-sinon-chai": "^2.0.2",
+        "karma-webkit-launcher": "^2.4.0",
+        "karma-webpack": "^5.0.1",
+        "lint-staged": "^15.2.2",
+        "load-grunt-config": "^4.0.1",
+        "memfs": "^4.9.2",
+        "mocha": "^10.4.0",
+        "prettier": "^3.2.5",
+        "rimraf": "^5.0.5",
+        "rollup": "^4.17.2",
+        "sinon": "^17.0.1",
+        "sinon-chai": "^3.7.0",
+        "terser-webpack-plugin": "^5.3.10",
+        "ts-loader": "^9.5.1",
+        "tsconfig-holy-grail": "^15.0.1",
+        "tslint": "^6.1.3",
+        "tslint-config-holy-grail": "^56.0.1",
+        "typescript": "^5.4.5",
+        "webpack": "^5.91.0",
+        "webpack-cli": "^5.1.4"
+    },
+    "files": [
+        "build/es2019/",
+        "build/es5/",
+        "src/"
+    ],
+    "homepage": "https://github.com/chrisguttandin/worker-timers",
+    "keywords": [
+        "Web Workers",
+        "WindowTimers",
+        "clearInterval",
+        "clearTimeout",
+        "interval",
+        "setInterval",
+        "setTimeout"
+    ],
+    "license": "MIT",
+    "main": "build/es5/bundle.js",
+    "module": "build/es2019/module.js",
+    "name": "worker-timers",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/chrisguttandin/worker-timers.git"
+    },
+    "scripts": {
+        "build": "rimraf build/* && webpack --config config/webpack/worker-es2019.js && tsc --project src/tsconfig.json && rollup --config config/rollup/bundle.mjs && babel ./build/es2019 --config-file ./config/babel/build.json --out-dir ./build/node",
+        "lint": "npm run lint:config && npm run lint:src && npm run lint:test",
+        "lint:config": "eslint --config config/eslint/config.json --ext .js --report-unused-disable-directives config/",
+        "lint:src": "tslint --config config/tslint/src.json --project src/tsconfig.json src/*.ts src/**/*.ts",
+        "lint:test": "eslint --config config/eslint/test.json --ext .js --report-unused-disable-directives test/",
+        "prepare": "husky install",
+        "prepublishOnly": "npm run build",
+        "test": "grunt lint && grunt test"
+    },
+    "types": "build/es2019/module.d.ts",
+    "version": "7.1.8"
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/factories/load-or-return-broker.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/factories/load-or-return-broker.ts
new file mode 100644
index 0000000..8febb2b
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/factories/load-or-return-broker.ts
@@ -0,0 +1,19 @@
+export const createLoadOrReturnBroker = <Broker>(loadBroker: (url: string) => Broker, worker: string) => {
+    let broker: null | Broker = null;
+
+    return () => {
+        if (broker !== null) {
+            return broker;
+        }
+
+        const blob = new Blob([worker], { type: 'application/javascript; charset=utf-8' });
+        const url = URL.createObjectURL(blob);
+
+        broker = loadBroker(url);
+
+        // Bug #1: Edge up until v18 didn't like the URL to be revoked directly.
+        setTimeout(() => URL.revokeObjectURL(url));
+
+        return broker;
+    };
+};
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/module.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/module.ts
new file mode 100644
index 0000000..2dd7c4e
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/module.ts
@@ -0,0 +1,13 @@
+import { load } from 'worker-timers-broker';
+import { createLoadOrReturnBroker } from './factories/load-or-return-broker';
+import { worker } from './worker/worker';
+
+const loadOrReturnBroker = createLoadOrReturnBroker(load, worker);
+
+export const clearInterval: ReturnType<typeof load>['clearInterval'] = (timerId) => loadOrReturnBroker().clearInterval(timerId);
+
+export const clearTimeout: ReturnType<typeof load>['clearTimeout'] = (timerId) => loadOrReturnBroker().clearTimeout(timerId);
+
+export const setInterval: ReturnType<typeof load>['setInterval'] = (...args) => loadOrReturnBroker().setInterval(...args);
+
+export const setTimeout: ReturnType<typeof load>['setTimeout'] = (...args) => loadOrReturnBroker().setTimeout(...args);
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/tsconfig.json b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/tsconfig.json
new file mode 100644
index 0000000..53941c6
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/tsconfig.json
@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "isolatedModules": true
+    },
+    "extends": "tsconfig-holy-grail/src/tsconfig-browser"
+}
diff --git a/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/worker/worker.ts b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/worker/worker.ts
new file mode 100644
index 0000000..79dffe3
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/node_modules/worker-timers/src/worker/worker.ts
@@ -0,0 +1,2 @@
+// This is the minified and stringified code of the worker-timers-worker package.
+export const worker = `(()=>{"use strict";const e=new Map,t=new Map,r=(e,t)=>{let r,o;const i=performance.now();r=i,o=e-Math.max(0,i-t);return{expected:r+o,remainingDelay:o}},o=(e,t,r,i)=>{const s=performance.now();s>r?postMessage({id:null,method:"call",params:{timerId:t,timerType:i}}):e.set(t,setTimeout(o,r-s,e,t,r,i))};addEventListener("message",(i=>{let{data:s}=i;try{if("clear"===s.method){const{id:r,params:{timerId:o,timerType:i}}=s;if("interval"===i)(t=>{const r=e.get(t);if(void 0===r)throw new Error('There is no interval scheduled with the given id "'.concat(t,'".'));clearTimeout(r),e.delete(t)})(o),postMessage({error:null,id:r});else{if("timeout"!==i)throw new Error('The given type "'.concat(i,'" is not supported'));(e=>{const r=t.get(e);if(void 0===r)throw new Error('There is no timeout scheduled with the given id "'.concat(e,'".'));clearTimeout(r),t.delete(e)})(o),postMessage({error:null,id:r})}}else{if("set"!==s.method)throw new Error('The given method "'.concat(s.method,'" is not supported'));{const{params:{delay:i,now:n,timerId:a,timerType:d}}=s;if("interval"===d)((t,i,s)=>{const{expected:n,remainingDelay:a}=r(t,s);e.set(i,setTimeout(o,a,e,i,n,"interval"))})(i,a,n);else{if("timeout"!==d)throw new Error('The given type "'.concat(d,'" is not supported'));((e,i,s)=>{const{expected:n,remainingDelay:a}=r(e,s);t.set(i,setTimeout(o,a,t,i,n,"timeout"))})(i,a,n)}}}}catch(e){postMessage({error:{message:e.message},id:s.id,result:null})}}))})();`; // tslint:disable-line:max-line-length
diff --git a/mqtt-backend/node_modules/retimer/package.json b/mqtt-backend/node_modules/retimer/package.json
new file mode 100644
index 0000000..7405102
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/package.json
@@ -0,0 +1,48 @@
+{
+  "name": "retimer",
+  "version": "4.0.0",
+  "description": "Reschedulable Timer for your node needs",
+  "main": "retimer.js",
+  "types": "types.d.ts",
+  "scripts": {
+    "lint": "standard",
+    "test": "npm run test:ci && npm run test:typescript",
+    "test:ci": "tape test.js | tap-dot",
+    "test:typescript": "tsd"
+  },
+  "pre-commit": [
+    "lint",
+    "test"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/mcollina/retimer.git"
+  },
+  "keywords": [
+    "schedulable",
+    "reschedulable",
+    "timer",
+    "setTimeout"
+  ],
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mcollina/retimer/issues"
+  },
+  "homepage": "https://github.com/mcollina/retimer#readme",
+  "devDependencies": {
+    "fastbench": "^1.0.1",
+    "pre-commit": "^1.2.2",
+    "standard": "^17.1.0",
+    "tap-dot": "^2.0.0",
+    "tape": "^5.6.6",
+    "tsd": "^0.28.1"
+  },
+  "browser": {
+    "./time.js": "./time-browser.js",
+    "./timers.js": "./timers-browser.js"
+  },
+  "dependencies": {
+    "worker-timers": "^7.0.75"
+  }
+}
diff --git a/mqtt-backend/node_modules/retimer/retimer.js b/mqtt-backend/node_modules/retimer/retimer.js
new file mode 100644
index 0000000..24ed732
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/retimer.js
@@ -0,0 +1,82 @@
+'use strict'
+
+const getTime = require('./time')
+const { clearTimeout, setTimeout } = require('./timers')
+
+class Retimer {
+  constructor (callback, timeout, args) {
+    const that = this
+
+    this._started = getTime()
+    this._rescheduled = 0
+    this._scheduled = timeout
+    this._args = args
+    this._triggered = false
+
+    this._timerWrapper = () => {
+      if (that._rescheduled > 0) {
+        that._scheduled = that._rescheduled - (getTime() - that._started)
+        that._schedule(that._scheduled)
+      } else {
+        that._triggered = true
+        callback.apply(null, that._args)
+      }
+    }
+
+    this._timer = setTimeout(this._timerWrapper, timeout)
+  }
+
+  reschedule (timeout) {
+    if (!timeout) {
+      timeout = this._scheduled
+    }
+    const now = getTime()
+    if ((now + timeout) - (this._started + this._scheduled) < 0) {
+      clearTimeout(this._timer)
+      this._schedule(timeout)
+    } else if (!this._triggered) {
+      this._started = now
+      this._rescheduled = timeout
+    } else {
+      this._schedule(timeout)
+    }
+  }
+
+  _schedule (timeout) {
+    this._triggered = false
+    this._started = getTime()
+    this._rescheduled = 0
+    this._scheduled = timeout
+    this._timer = setTimeout(this._timerWrapper, timeout)
+  }
+
+  clear () {
+    clearTimeout(this._timer)
+  }
+}
+
+function retimer () {
+  if (typeof arguments[0] !== 'function') {
+    throw new Error('callback needed')
+  }
+
+  if (typeof arguments[1] !== 'number') {
+    throw new Error('timeout needed')
+  }
+
+  let args
+
+  if (arguments.length > 0) {
+    args = new Array(arguments.length - 2)
+
+    /* eslint-disable no-var */
+    for (var i = 0; i < args.length; i++) {
+      args[i] = arguments[i + 2]
+    }
+  }
+
+  return new Retimer(arguments[0], arguments[1], args)
+}
+
+module.exports = retimer
+module.exports.Retimer = Retimer
diff --git a/mqtt-backend/node_modules/retimer/test.js b/mqtt-backend/node_modules/retimer/test.js
new file mode 100644
index 0000000..3ad5796
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/test.js
@@ -0,0 +1,117 @@
+'use strict'
+
+const test = require('tape')
+const retimer = require('./')
+
+test('schedule a callback', function (t) {
+  t.plan(1)
+
+  const start = Date.now()
+
+  retimer(function () {
+    t.ok(Date.now() - start >= 50, 'it was deferred ok!')
+  }, 50)
+})
+
+test('reschedule a callback', function (t) {
+  t.plan(1)
+
+  const start = Date.now()
+
+  const timer = retimer(function () {
+    t.ok(Date.now() - start >= 70, 'it was deferred ok!')
+  }, 50)
+
+  setTimeout(function () {
+    timer.reschedule(50)
+  }, 20)
+})
+
+test('reschedule multiple times', function (t) {
+  t.plan(1)
+
+  const start = Date.now()
+
+  const timer = retimer(function () {
+    t.ok(Date.now() - start >= 90, 'it was deferred ok!')
+  }, 50)
+
+  setTimeout(function () {
+    timer.reschedule(50)
+    setTimeout(function () {
+      timer.reschedule(50)
+    }, 20)
+  }, 20)
+})
+
+test('clear a timer', function (t) {
+  t.plan(1)
+
+  const timer = retimer(function () {
+    t.fail('the timer should never get called')
+  }, 20)
+
+  timer.clear()
+
+  setTimeout(function () {
+    t.pass('nothing happened')
+  }, 50)
+})
+
+test('clear a timer after a reschedule', function (t) {
+  t.plan(1)
+
+  const timer = retimer(function () {
+    t.fail('the timer should never get called')
+  }, 20)
+
+  setTimeout(function () {
+    timer.reschedule(50)
+    setTimeout(function () {
+      timer.clear()
+    }, 10)
+  }, 10)
+
+  setTimeout(function () {
+    t.pass('nothing happened')
+  }, 50)
+})
+
+test('can be rescheduled early', function (t) {
+  t.plan(1)
+
+  const start = Date.now()
+
+  const timer = retimer(function () {
+    t.ok(Date.now() - start <= 500, 'it was rescheduled!')
+  }, 500)
+
+  setTimeout(function () {
+    timer.reschedule(10)
+  }, 20)
+})
+
+test('can be rescheduled even if the timeout has already triggered', function (t) {
+  t.plan(2)
+
+  const start = Date.now()
+  let count = 0
+
+  const timer = retimer(function () {
+    count++
+    if (count === 1) {
+      t.ok(Date.now() - start >= 20, 'it was triggered!')
+      timer.reschedule(20)
+    } else {
+      t.ok(Date.now() - start >= 40, 'it was rescheduled!')
+    }
+  }, 20)
+})
+
+test('pass arguments to the callback', function (t) {
+  t.plan(1)
+
+  retimer(function (arg) {
+    t.equal(arg, 42, 'argument matches')
+  }, 50, 42)
+})
diff --git a/mqtt-backend/node_modules/retimer/time-browser.js b/mqtt-backend/node_modules/retimer/time-browser.js
new file mode 100644
index 0000000..3f7db7c
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/time-browser.js
@@ -0,0 +1,5 @@
+'use strict'
+
+module.exports = function getTime () {
+  return Date.now()
+}
diff --git a/mqtt-backend/node_modules/retimer/time.js b/mqtt-backend/node_modules/retimer/time.js
new file mode 100644
index 0000000..23805e8
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/time.js
@@ -0,0 +1,6 @@
+'use strict'
+
+module.exports = function getTime () {
+  const t = process.hrtime()
+  return Math.floor(t[0] * 1000 + t[1] / 1000000)
+}
diff --git a/mqtt-backend/node_modules/retimer/timers-browser.js b/mqtt-backend/node_modules/retimer/timers-browser.js
new file mode 100644
index 0000000..040ff3d
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/timers-browser.js
@@ -0,0 +1,8 @@
+const { clearInterval, clearTimeout, setInterval, setTimeout } = require('worker-timers')
+
+module.exports = {
+  clearInterval,
+  clearTimeout,
+  setInterval,
+  setTimeout
+}
diff --git a/mqtt-backend/node_modules/retimer/timers.js b/mqtt-backend/node_modules/retimer/timers.js
new file mode 100644
index 0000000..f94c144
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/timers.js
@@ -0,0 +1,6 @@
+module.exports = {
+  clearInterval,
+  clearTimeout,
+  setInterval,
+  setTimeout
+}
diff --git a/mqtt-backend/node_modules/retimer/types.d.ts b/mqtt-backend/node_modules/retimer/types.d.ts
new file mode 100644
index 0000000..698d368
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/types.d.ts
@@ -0,0 +1,19 @@
+type TimerCallback = (...args: any[]) => void;
+
+export class Retimer {
+  constructor(callback: TimerCallback, timeout: number, args?: any[]);
+
+  reschedule(timeout?: number): void;
+  clear(): void;
+}
+
+export default function retimer(
+  callback: TimerCallback,
+  timeout: number,
+  ...args: any[]
+): Retimer;
+
+
+declare module 'retimer' {
+    export = retimer;
+  }
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/retimer/types.test-d.ts b/mqtt-backend/node_modules/retimer/types.test-d.ts
new file mode 100644
index 0000000..dfde752
--- /dev/null
+++ b/mqtt-backend/node_modules/retimer/types.test-d.ts
@@ -0,0 +1,11 @@
+import retimer, { Retimer } from "./types"
+import { expectType } from 'tsd'
+
+
+expectType<Retimer>(retimer(() => {}, 1000))
+expectType<Retimer>(retimer(() => {}, 1000, 42))
+
+// use new Retimer()
+expectType<Retimer>(new Retimer(() => {}, 1000))
+expectType<Retimer>(new Retimer(() => {}, 1000, [42]))
+
diff --git a/mqtt-backend/node_modules/reusify/.github/dependabot.yml b/mqtt-backend/node_modules/reusify/.github/dependabot.yml
new file mode 100644
index 0000000..4872c5a
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/.github/dependabot.yml
@@ -0,0 +1,7 @@
+version: 2
+updates:
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
diff --git a/mqtt-backend/node_modules/reusify/.github/workflows/ci.yml b/mqtt-backend/node_modules/reusify/.github/workflows/ci.yml
new file mode 100644
index 0000000..1e30ad8
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/.github/workflows/ci.yml
@@ -0,0 +1,96 @@
+name: ci
+
+on: [push, pull_request]
+
+jobs:
+  legacy:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: ['0.10', '0.12', 4.x, 6.x, 8.x, 10.x, 12.x, 13.x, 14.x, 15.x, 16.x]
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install --production && npm install tape
+
+      - name: Run tests
+        run: |
+          npm run test
+
+  test:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        node-version: [18.x, 20.x, 22.x]
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node-version }}
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Run tests
+        run: |
+          npm run test:coverage
+
+  types:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Run types tests
+        run: |
+          npm run test:typescript
+
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Install
+        run: |
+          npm install
+
+      - name: Lint
+        run: |
+          npm run lint
diff --git a/mqtt-backend/node_modules/reusify/LICENSE b/mqtt-backend/node_modules/reusify/LICENSE
new file mode 100644
index 0000000..56d1590
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/LICENSE
@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2015-2024 Matteo Collina
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
diff --git a/mqtt-backend/node_modules/reusify/README.md b/mqtt-backend/node_modules/reusify/README.md
new file mode 100644
index 0000000..1aaee5d
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/README.md
@@ -0,0 +1,139 @@
+# reusify
+
+[![npm version][npm-badge]][npm-url]
+
+Reuse your objects and functions for maximum speed. This technique will
+make any function run ~10% faster. You call your functions a
+lot, and it adds up quickly in hot code paths.
+
+```
+$ node benchmarks/createNoCodeFunction.js
+Total time 53133
+Total iterations 100000000
+Iteration/s 1882069.5236482036
+
+$ node benchmarks/reuseNoCodeFunction.js
+Total time 50617
+Total iterations 100000000
+Iteration/s 1975620.838848608
+```
+
+The above benchmark uses fibonacci to simulate a real high-cpu load.
+The actual numbers might differ for your use case, but the difference
+should not.
+
+The benchmark was taken using Node v6.10.0.
+
+This library was extracted from
+[fastparallel](http://npm.im/fastparallel).
+
+## Example
+
+```js
+var reusify = require('reusify')
+var fib = require('reusify/benchmarks/fib')
+var instance = reusify(MyObject)
+
+// get an object from the cache,
+// or creates a new one when cache is empty
+var obj = instance.get()
+
+// set the state
+obj.num = 100
+obj.func()
+
+// reset the state.
+// if the state contains any external object
+// do not use delete operator (it is slow)
+// prefer set them to null
+obj.num = 0
+
+// store an object in the cache
+instance.release(obj)
+
+function MyObject () {
+  // you need to define this property
+  // so V8 can compile MyObject into an
+  // hidden class
+  this.next = null
+  this.num = 0
+
+  var that = this
+
+  // this function is never reallocated,
+  // so it can be optimized by V8
+  this.func = function () {
+    if (null) {
+      // do nothing
+    } else {
+      // calculates fibonacci
+      fib(that.num)
+    }
+  }
+}
+```
+
+The above example was intended for synchronous code, let's see async:
+```js
+var reusify = require('reusify')
+var instance = reusify(MyObject)
+
+for (var i = 0; i < 100; i++) {
+  getData(i, console.log)
+}
+
+function getData (value, cb) {
+  var obj = instance.get()
+
+  obj.value = value
+  obj.cb = cb
+  obj.run()
+}
+
+function MyObject () {
+  this.next = null
+  this.value = null
+
+  var that = this
+
+  this.run = function () {
+    asyncOperation(that.value, that.handle)
+  }
+
+  this.handle = function (err, result) {
+    that.cb(err, result)
+    that.value = null
+    that.cb = null
+    instance.release(that)
+  }
+}
+```
+
+Also note how in the above examples, the code, that consumes an instance of `MyObject`,
+reset the state to initial condition, just before storing it in the cache.
+That's needed so that every subsequent request for an instance from the cache,
+could get a clean instance.
+
+## Why
+
+It is faster because V8 doesn't have to collect all the functions you
+create. On a short-lived benchmark, it is as fast as creating the
+nested function, but on a longer time frame it creates less
+pressure on the garbage collector.
+
+## Other examples
+If you want to see some complex example, checkout [middie](https://github.com/fastify/middie) and [steed](https://github.com/mcollina/steed).
+
+## Acknowledgements
+
+Thanks to [Trevor Norris](https://github.com/trevnorris) for
+getting me down the rabbit hole of performance, and thanks to [Mathias
+Buss](http://github.com/mafintosh) for suggesting me to share this
+trick.
+
+## License
+
+MIT
+
+[npm-badge]: https://badge.fury.io/js/reusify.svg
+[npm-url]: https://badge.fury.io/js/reusify
diff --git a/mqtt-backend/node_modules/reusify/SECURITY.md b/mqtt-backend/node_modules/reusify/SECURITY.md
new file mode 100644
index 0000000..dd9f1d5
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/SECURITY.md
@@ -0,0 +1,15 @@
+# Security Policy
+
+## Supported Versions
+
+Use this section to tell people about which versions of your project are
+currently being supported with security updates.
+
+| Version | Supported          |
+| ------- | ------------------ |
+| 1.x     | :white_check_mark: |
+| < 1.0   | :x:                |
+
+## Reporting a Vulnerability
+
+Please report all vulnerabilities at [https://github.com/mcollina/fastq/security](https://github.com/mcollina/fastq/security).
diff --git a/mqtt-backend/node_modules/reusify/benchmarks/createNoCodeFunction.js b/mqtt-backend/node_modules/reusify/benchmarks/createNoCodeFunction.js
new file mode 100644
index 0000000..ce1aac7
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/benchmarks/createNoCodeFunction.js
@@ -0,0 +1,30 @@
+'use strict'
+
+var fib = require('./fib')
+var max = 100000000
+var start = Date.now()
+
+// create a funcion with the typical error
+// pattern, that delegates the heavy load
+// to something else
+function createNoCodeFunction () {
+  /* eslint no-constant-condition: "off" */
+  var num = 100
+
+  ;(function () {
+    if (null) {
+      // do nothing
+    } else {
+      fib(num)
+    }
+  })()
+}
+
+for (var i = 0; i < max; i++) {
+  createNoCodeFunction()
+}
+
+var time = Date.now() - start
+console.log('Total time', time)
+console.log('Total iterations', max)
+console.log('Iteration/s', max / time * 1000)
diff --git a/mqtt-backend/node_modules/reusify/benchmarks/fib.js b/mqtt-backend/node_modules/reusify/benchmarks/fib.js
new file mode 100644
index 0000000..e22cc48
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/benchmarks/fib.js
@@ -0,0 +1,13 @@
+'use strict'
+
+function fib (num) {
+  var fib = []
+
+  fib[0] = 0
+  fib[1] = 1
+  for (var i = 2; i <= num; i++) {
+    fib[i] = fib[i - 2] + fib[i - 1]
+  }
+}
+
+module.exports = fib
diff --git a/mqtt-backend/node_modules/reusify/benchmarks/reuseNoCodeFunction.js b/mqtt-backend/node_modules/reusify/benchmarks/reuseNoCodeFunction.js
new file mode 100644
index 0000000..3358d6e
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/benchmarks/reuseNoCodeFunction.js
@@ -0,0 +1,38 @@
+'use strict'
+
+var reusify = require('../')
+var fib = require('./fib')
+var instance = reusify(MyObject)
+var max = 100000000
+var start = Date.now()
+
+function reuseNoCodeFunction () {
+  var obj = instance.get()
+  obj.num = 100
+  obj.func()
+  obj.num = 0
+  instance.release(obj)
+}
+
+function MyObject () {
+  this.next = null
+  var that = this
+  this.num = 0
+  this.func = function () {
+    /* eslint no-constant-condition: "off" */
+    if (null) {
+      // do nothing
+    } else {
+      fib(that.num)
+    }
+  }
+}
+
+for (var i = 0; i < max; i++) {
+  reuseNoCodeFunction()
+}
+
+var time = Date.now() - start
+console.log('Total time', time)
+console.log('Total iterations', max)
+console.log('Iteration/s', max / time * 1000)
diff --git a/mqtt-backend/node_modules/reusify/eslint.config.js b/mqtt-backend/node_modules/reusify/eslint.config.js
new file mode 100644
index 0000000..d0a9af6
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/eslint.config.js
@@ -0,0 +1,14 @@
+'use strict'
+
+const base = require('neostandard')({})
+
+module.exports = [
+  ...base,
+  {
+    name: 'old-standard',
+    rules: {
+      'no-var': 'off',
+      'object-shorthand': 'off',
+    }
+  }
+]
diff --git a/mqtt-backend/node_modules/reusify/package.json b/mqtt-backend/node_modules/reusify/package.json
new file mode 100644
index 0000000..e47ff11
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/package.json
@@ -0,0 +1,50 @@
+{
+  "name": "reusify",
+  "version": "1.1.0",
+  "description": "Reuse objects and functions with style",
+  "main": "reusify.js",
+  "types": "reusify.d.ts",
+  "scripts": {
+    "lint": "eslint",
+    "test": "tape test.js",
+    "test:coverage": "c8 --100 tape test.js",
+    "test:typescript": "tsc"
+  },
+  "pre-commit": [
+    "lint",
+    "test",
+    "test:typescript"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/mcollina/reusify.git"
+  },
+  "keywords": [
+    "reuse",
+    "object",
+    "performance",
+    "function",
+    "fast"
+  ],
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/mcollina/reusify/issues"
+  },
+  "homepage": "https://github.com/mcollina/reusify#readme",
+  "engines": {
+    "node": ">=0.10.0",
+    "iojs": ">=1.0.0"
+  },
+  "devDependencies": {
+    "@types/node": "^22.9.0",
+    "eslint": "^9.13.0",
+    "neostandard": "^0.12.0",
+    "pre-commit": "^1.2.2",
+    "tape": "^5.0.0",
+    "c8": "^10.1.2",
+    "typescript": "^5.2.2"
+  },
+  "dependencies": {
+  }
+}
diff --git a/mqtt-backend/node_modules/reusify/reusify.d.ts b/mqtt-backend/node_modules/reusify/reusify.d.ts
new file mode 100644
index 0000000..9ba277d
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/reusify.d.ts
@@ -0,0 +1,14 @@
+interface Node {
+	next: Node | null;
+}
+
+interface Constructor<T> {
+	new(): T;
+}
+
+declare function reusify<T extends Node>(constructor: Constructor<T>): {
+	get(): T;
+	release(node: T): void;
+};
+
+export = reusify;
diff --git a/mqtt-backend/node_modules/reusify/reusify.js b/mqtt-backend/node_modules/reusify/reusify.js
new file mode 100644
index 0000000..e6f36f3
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/reusify.js
@@ -0,0 +1,33 @@
+'use strict'
+
+function reusify (Constructor) {
+  var head = new Constructor()
+  var tail = head
+
+  function get () {
+    var current = head
+
+    if (current.next) {
+      head = current.next
+    } else {
+      head = new Constructor()
+      tail = head
+    }
+
+    current.next = null
+
+    return current
+  }
+
+  function release (obj) {
+    tail.next = obj
+    tail = obj
+  }
+
+  return {
+    get: get,
+    release: release
+  }
+}
+
+module.exports = reusify
diff --git a/mqtt-backend/node_modules/reusify/test.js b/mqtt-backend/node_modules/reusify/test.js
new file mode 100644
index 0000000..929cfd7
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/test.js
@@ -0,0 +1,66 @@
+'use strict'
+
+var test = require('tape')
+var reusify = require('./')
+
+test('reuse objects', function (t) {
+  t.plan(6)
+
+  function MyObject () {
+    t.pass('constructor called')
+    this.next = null
+  }
+
+  var instance = reusify(MyObject)
+  var obj = instance.get()
+
+  t.notEqual(obj, instance.get(), 'two instance created')
+  t.notOk(obj.next, 'next must be null')
+
+  instance.release(obj)
+
+  // the internals keeps a hot copy ready for reuse
+  // putting this one back in the queue
+  instance.release(instance.get())
+
+  // comparing the old one with the one we got
+  // never do this in real code, after release you
+  // should never reuse that instance
+  t.equal(obj, instance.get(), 'instance must be reused')
+})
+
+test('reuse more than 2 objects', function (t) {
+  function MyObject () {
+    t.pass('constructor called')
+    this.next = null
+  }
+
+  var instance = reusify(MyObject)
+  var obj = instance.get()
+  var obj2 = instance.get()
+  var obj3 = instance.get()
+
+  t.notOk(obj.next, 'next must be null')
+  t.notOk(obj2.next, 'next must be null')
+  t.notOk(obj3.next, 'next must be null')
+
+  t.notEqual(obj, obj2)
+  t.notEqual(obj, obj3)
+  t.notEqual(obj3, obj2)
+
+  instance.release(obj)
+  instance.release(obj2)
+  instance.release(obj3)
+
+  // skip one
+  instance.get()
+
+  var obj4 = instance.get()
+  var obj5 = instance.get()
+  var obj6 = instance.get()
+
+  t.equal(obj4, obj)
+  t.equal(obj5, obj2)
+  t.equal(obj6, obj3)
+  t.end()
+})
diff --git a/mqtt-backend/node_modules/reusify/tsconfig.json b/mqtt-backend/node_modules/reusify/tsconfig.json
new file mode 100644
index 0000000..dbe862b
--- /dev/null
+++ b/mqtt-backend/node_modules/reusify/tsconfig.json
@@ -0,0 +1,11 @@
+{
+  "compilerOptions": {
+    "target": "es6",
+    "module": "commonjs",
+    "noEmit": true,
+    "strict": true
+  },
+  "files": [
+    "./reusify.d.ts"
+  ]
+}
diff --git a/mqtt-backend/node_modules/rfdc/.github/workflows/ci.yml b/mqtt-backend/node_modules/rfdc/.github/workflows/ci.yml
new file mode 100644
index 0000000..751a101
--- /dev/null
+++ b/mqtt-backend/node_modules/rfdc/.github/workflows/ci.yml
@@ -0,0 +1,21 @@
+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        node-version: [8.x, 10.x, 12.x, 14.x, 16.x, 18.x, 20.x, 22.x]
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v1
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm install
+    - run: npm run ci
diff --git a/mqtt-backend/node_modules/rfdc/LICENSE b/mqtt-backend/node_modules/rfdc/LICENSE
new file mode 100644
index 0000000..d600e51
--- /dev/null
+++ b/mqtt-backend/node_modules/rfdc/LICENSE
@@ -0,0 +1,15 @@
+Copyright 2019 "David Mark Clements <david.mark.clements@gmail.com>"
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
+documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
+the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and 
+to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions 
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED 
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 
+CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 
+IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/rfdc/default.js b/mqtt-backend/node_modules/rfdc/default.js
new file mode 100644
index 0000000..51b108d
--- /dev/null
+++ b/mqtt-backend/node_modules/rfdc/default.js
@@ -0,0 +1,3 @@
+'use strict'
+
+module.exports = require('./index.js')()
diff --git a/mqtt-backend/node_modules/rfdc/index.d.ts b/mqtt-backend/node_modules/rfdc/index.d.ts
new file mode 100644
index 0000000..83c5ec9
--- /dev/null
+++ b/mqtt-backend/node_modules/rfdc/index.d.ts
@@ -0,0 +1,13 @@
+declare namespace rfdc {
+  interface Options {
+    proto?: boolean;
+    circles?: boolean;
+    constructorHandlers?: ConstructorHandlerConfig[];
+  }
+}
+type Constructor<T> = {new(...args: any[]): T};
+type ConstructorHandlerConfig<T = any> = [Constructor<T>, (o: T) => T];
+
+declare function rfdc(options?: rfdc.Options): <T>(input: T) => T;
+
+export = rfdc;
diff --git a/mqtt-backend/node_modules/rfdc/index.js b/mqtt-backend/node_modules/rfdc/index.js
new file mode 100644
index 0000000..a964561
--- /dev/null
+++ b/mqtt-backend/node_modules/rfdc/index.js
@@ -0,0 +1,198 @@
+'use strict'
+module.exports = rfdc
+
+function copyBuffer (cur) {
+  if (cur instanceof Buffer) {
+    return Buffer.from(cur)
+  }
+
+  return new cur.constructor(cur.buffer.slice(), cur.byteOffset, cur.length)
+}
+
+function rfdc (opts) {
+  opts = opts || {}
+  if (opts.circles) return rfdcCircles(opts)
+
+  const constructorHandlers = new Map()
+  constructorHandlers.set(Date, (o) => new Date(o))
+  constructorHandlers.set(Map, (o, fn) => new Map(cloneArray(Array.from(o), fn)))
+  constructorHandlers.set(Set, (o, fn) => new Set(cloneArray(Array.from(o), fn)))
+  if (opts.constructorHandlers) {
+    for (const handler of opts.constructorHandlers) {
+      constructorHandlers.set(handler[0], handler[1])
+    }
+  }
+
+  let handler = null
+
+  return opts.proto ? cloneProto : clone
+
+  function cloneArray (a, fn) {
+    const keys = Object.keys(a)
+    const a2 = new Array(keys.length)
+    for (let i = 0; i < keys.length; i++) {
+      const k = keys[i]
+      const cur = a[k]
+      if (typeof cur !== 'object' || cur === null) {
+        a2[k] = cur
+      } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+        a2[k] = handler(cur, fn)
+      } else if (ArrayBuffer.isView(cur)) {
+        a2[k] = copyBuffer(cur)
+      } else {
+        a2[k] = fn(cur)
+      }
+    }
+    return a2
+  }
+
+  function clone (o) {
+    if (typeof o !== 'object' || o === null) return o
+    if (Array.isArray(o)) return cloneArray(o, clone)
+    if (o.constructor !== Object && (handler = constructorHandlers.get(o.constructor))) {
+      return handler(o, clone)
+    }
+    const o2 = {}
+    for (const k in o) {
+      if (Object.hasOwnProperty.call(o, k) === false) continue
+      const cur = o[k]
+      if (typeof cur !== 'object' || cur === null) {
+        o2[k] = cur
+      } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+        o2[k] = handler(cur, clone)
+      } else if (ArrayBuffer.isView(cur)) {
+        o2[k] = copyBuffer(cur)
+      } else {
+        o2[k] = clone(cur)
+      }
+    }
+    return o2
+  }
+
+  function cloneProto (o) {
+    if (typeof o !== 'object' || o === null) return o
+    if (Array.isArray(o)) return cloneArray(o, cloneProto)
+    if (o.constructor !== Object && (handler = constructorHandlers.get(o.constructor))) {
+      return handler(o, cloneProto)
+    }
+    const o2 = {}
+    for (const k in o) {
+      const cur = o[k]
+      if (typeof cur !== 'object' || cur === null) {
+        o2[k] = cur
+      } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+        o2[k] = handler(cur, cloneProto)
+      } else if (ArrayBuffer.isView(cur)) {
+        o2[k] = copyBuffer(cur)
+      } else {
+        o2[k] = cloneProto(cur)
+      }
+    }
+    return o2
+  }
+}
+
+function rfdcCircles (opts) {
+  const refs = []
+  const refsNew = []
+
+  const constructorHandlers = new Map()
+  constructorHandlers.set(Date, (o) => new Date(o))
+  constructorHandlers.set(Map, (o, fn) => new Map(cloneArray(Array.from(o), fn)))
+  constructorHandlers.set(Set, (o, fn) => new Set(cloneArray(Array.from(o), fn)))
+  if (opts.constructorHandlers) {
+    for (const handler of opts.constructorHandlers) {
+      constructorHandlers.set(handler[0], handler[1])
+    }
+  }
+
+  let handler = null
+  return opts.proto ? cloneProto : clone
+
+  function cloneArray (a, fn) {
+    const keys = Object.keys(a)
+    const a2 = new Array(keys.length)
+    for (let i = 0; i < keys.length; i++) {
+      const k = keys[i]
+      const cur = a[k]
+      if (typeof cur !== 'object' || cur === null) {
+        a2[k] = cur
+      } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+        a2[k] = handler(cur, fn)
+      } else if (ArrayBuffer.isView(cur)) {
+        a2[k] = copyBuffer(cur)
+      } else {
+        const index = refs.indexOf(cur)
+        if (index !== -1) {
+          a2[k] = refsNew[index]
+        } else {
+          a2[k] = fn(cur)
+        }
+      }
+    }
+    return a2
+  }
+
+  function clone (o) {
+    if (typeof o !== 'object' || o === null) return o
+    if (Array.isArray(o)) return cloneArray(o, clone)
+    if (o.constructor !== Object && (handler = constructorHandlers.get(o.constructor))) {
+      return handler(o, clone)
+    }
+    const o2 = {}
+    refs.push(o)
+    refsNew.push(o2)
+    for (const k in o) {
+      if (Object.hasOwnProperty.call(o, k) === false) continue
+      const cur = o[k]
+      if (typeof cur !== 'object' || cur === null) {
+        o2[k] = cur
+      } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+        o2[k] = handler(cur, clone)
+      } else if (ArrayBuffer.isView(cur)) {
+        o2[k] = copyBuffer(cur)
+      } else {
+        const i = refs.indexOf(cur)
+        if (i !== -1) {
+          o2[k] = refsNew[i]
+        } else {
+          o2[k] = clone(cur)
+        }
+      }
+    }
+    refs.pop()
+    refsNew.pop()
+    return o2
+  }
+
+  function cloneProto (o) {
+    if (typeof o !== 'object' || o === null) return o
+    if (Array.isArray(o)) return cloneArray(o, cloneProto)
+    if (o.constructor !== Object && (handler = constructorHandlers.get(o.constructor))) {
+      return handler(o, cloneProto)
+    }
+    const o2 = {}
+    refs.push(o)
+    refsNew.push(o2)
+    for (const k in o) {
+      const cur = o[k]
+      if (typeof cur !== 'object' || cur === null) {
+        o2[k] = cur
+      } else if (cur.constructor !== Object && (handler = constructorHandlers.get(cur.constructor))) {
+        o2[k] = handler(cur, cloneProto)
+      } else if (ArrayBuffer.isView(cur)) {
+        o2[k] = copyBuffer(cur)
+      } else {
+        const i = refs.indexOf(cur)
+        if (i !== -1) {
+          o2[k] = refsNew[i]
+        } else {
+          o2[k] = cloneProto(cur)
+        }
+      }
+    }
+    refs.pop()
+    refsNew.pop()
+    return o2
+  }
+}
diff --git a/mqtt-backend/node_modules/rfdc/index.test-d.ts b/mqtt-backend/node_modules/rfdc/index.test-d.ts
new file mode 100644
index 0000000..ea9595f
--- /dev/null
+++ b/mqtt-backend/node_modules/rfdc/index.test-d.ts
@@ -0,0 +1,13 @@
+import { expectType } from 'tsd';
+import rfdc = require('.');
+
+const clone = rfdc();
+
+expectType<number>(clone(5));
+expectType<{ lorem: string }>(clone({ lorem: "ipsum" }));
+
+const cloneHandlers = rfdc({
+  constructorHandlers: [
+    [RegExp, (o) => new RegExp(o)],
+  ],
+})
diff --git a/mqtt-backend/node_modules/rfdc/package.json b/mqtt-backend/node_modules/rfdc/package.json
new file mode 100644
index 0000000..786f2be
--- /dev/null
+++ b/mqtt-backend/node_modules/rfdc/package.json
@@ -0,0 +1,73 @@
+{
+  "name": "rfdc",
+  "version": "1.4.1",
+  "description": "Really Fast Deep Clone",
+  "main": "index.js",
+  "exports": {
+    ".": "./index.js",
+    "./default": "./default.js"
+  },
+  "scripts": {
+    "test": "tap -R min test && npm run lint",
+    "bench": "node benchmark",
+    "lint": "standard --fix",
+    "cov": "tap --100 test",
+    "cov-ui": "tap --coverage-report=html test",
+    "ci": "standard && tap --100 --coverage-report=text-lcov test | codecov --pipe"
+  },
+  "keywords": [
+    "object",
+    "obj",
+    "properties",
+    "clone",
+    "copy",
+    "deep",
+    "recursive",
+    "key",
+    "keys",
+    "values",
+    "prop",
+    "deep-clone",
+    "deepclone",
+    "deep-copy",
+    "deepcopy",
+    "fast",
+    "performance",
+    "performant",
+    "fastclone",
+    "fastcopy",
+    "fast-clone",
+    "fast-deep-clone",
+    "fast-copy",
+    "fast-deep-copy"
+  ],
+  "author": "David Mark Clements <david.clements@nearform.com>",
+  "license": "MIT",
+  "devDependencies": {
+    "clone-deep": "^4.0.1",
+    "codecov": "^3.4.0",
+    "deep-copy": "^1.4.2",
+    "fast-copy": "^1.2.1",
+    "fastbench": "^1.0.1",
+    "fastest-json-copy": "^1.0.1",
+    "lodash.clonedeep": "^4.5.0",
+    "nano-copy": "^0.1.0",
+    "plain-object-clone": "^1.1.0",
+    "ramda": "^0.27.1",
+    "standard": "^17.0.0",
+    "tap": "^12.0.1",
+    "tsd": "^0.7.4"
+  },
+  "directories": {
+    "test": "test"
+  },
+  "dependencies": {},
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/davidmarkclements/rfdc.git"
+  },
+  "bugs": {
+    "url": "https://github.com/davidmarkclements/rfdc/issues"
+  },
+  "homepage": "https://github.com/davidmarkclements/rfdc#readme"
+}
diff --git a/mqtt-backend/node_modules/rfdc/readme.md b/mqtt-backend/node_modules/rfdc/readme.md
new file mode 100644
index 0000000..892b11f
--- /dev/null
+++ b/mqtt-backend/node_modules/rfdc/readme.md
@@ -0,0 +1,181 @@
+# rfdc
+
+Really Fast Deep Clone
+
+
+[![build status](https://img.shields.io/travis/davidmarkclements/rfdc.svg)](https://travis-ci.org/davidmarkclements/rfdc)
+[![coverage](https://img.shields.io/codecov/c/github/davidmarkclements/rfdc.svg)](https://codecov.io/gh/davidmarkclements/rfdc)
+[![js-standard-style](https://img.shields.io/badge/code%20style-standard-brightgreen.svg?style=flat)](http://standardjs.com/)
+
+
+## Usage
+
+```js
+const clone = require('rfdc')()
+clone({a: 1, b: {c: 2}}) // => {a: 1, b: {c: 2}}
+```
+
+## API
+
+### `require('rfdc')(opts = { proto: false, circles: false, constructorHandlers: [] }) => clone(obj) => obj2`
+
+#### `proto` option
+
+Copy prototype properties as well as own properties into the new object.
+
+It's marginally faster to allow enumerable properties on the prototype
+to be copied into the cloned object (not onto it's prototype, directly onto the object).
+
+To explain by way of code:
+
+```js
+require('rfdc')({ proto: false })(Object.create({a: 1})) // => {}
+require('rfdc')({ proto: true })(Object.create({a: 1})) // => {a: 1}
+```
+
+Setting `proto` to `true` will provide an additional 2% performance boost.
+
+#### `circles` option
+
+Keeping track of circular references will slow down performance with an
+additional 25% overhead. Even if an object doesn't have any circular references,
+the tracking overhead is the cost. By default if an object with a circular
+reference is passed to `rfdc`, it will throw (similar to how `JSON.stringify` \
+would throw).
+
+Use the `circles` option to detect and preserve circular references in the
+object. If performance is important, try removing the circular reference from
+the object (set to `undefined`) and then add it back manually after cloning
+instead of using this option.
+
+#### `constructorHandlers` option
+
+Sometimes consumers may want to add custom clone behaviour for particular classes
+(for example `RegExp` or `ObjectId`, which aren't supported out-of-the-box).
+
+This can be done by passing `constructorHandlers`, which takes an array of tuples,
+where the first item is the class to match, and the second item is a function that
+takes the input and returns a cloned output:
+
+```js
+const clone = require('rfdc')({
+  constructorHandlers: [
+    [RegExp, (o) => new RegExp(o)],
+  ]
+})
+
+clone({r: /foo/}) // => {r: /foo/}
+```
+
+**NOTE**: For performance reasons, the handlers will only match an instance of the
+*exact* class (not a subclass). Subclasses will need to be added separately if they
+also need special clone behaviour.
+
+### `default` import
+It is also possible to directly import the clone function with all options set
+to their default:
+
+```js
+const clone = require("rfdc/default")
+clone({a: 1, b: {c: 2}}) // => {a: 1, b: {c: 2}}
+```
+
+### Types
+
+`rfdc` clones all JSON types:
+
+* `Object`
+* `Array`
+* `Number`
+* `String`
+* `null`
+
+With additional support for:
+
+* `Date` (copied)
+* `undefined` (copied)
+* `Buffer` (copied)
+* `TypedArray` (copied)
+* `Map` (copied)
+* `Set` (copied)
+* `Function` (referenced)
+* `AsyncFunction` (referenced)
+* `GeneratorFunction` (referenced)
+* `arguments` (copied to a normal object)
+
+All other types have output values that match the output
+of `JSON.parse(JSON.stringify(o))`.
+
+For instance:
+
+```js
+const rfdc = require('rfdc')()
+const err = Error()
+err.code = 1
+JSON.parse(JSON.stringify(e)) // {code: 1}
+rfdc(e) // {code: 1}
+
+JSON.parse(JSON.stringify({rx: /foo/})) // {rx: {}}
+rfdc({rx: /foo/}) // {rx: {}}
+```
+
+## Benchmarks
+
+```sh
+npm run bench
+```
+
+```
+benchDeepCopy*100: 671.675ms
+benchLodashCloneDeep*100: 1.574s
+benchCloneDeep*100: 936.792ms
+benchFastCopy*100: 822.668ms
+benchFastestJsonCopy*100: 363.898ms // See note below
+benchPlainObjectClone*100: 556.635ms
+benchNanoCopy*100: 770.234ms
+benchRamdaClone*100: 2.695s
+benchJsonParseJsonStringify*100: 2.290s // JSON.parse(JSON.stringify(obj))
+benchRfdc*100: 412.818ms
+benchRfdcProto*100: 424.076ms
+benchRfdcCircles*100: 443.357ms
+benchRfdcCirclesProto*100: 465.053ms
+```
+
+It is true that [fastest-json-copy](https://www.npmjs.com/package/fastest-json-copy) may be faster, BUT it has such huge limitations that it is rarely useful. For example, it treats things like `Date` and `Map` instances the same as empty `{}`. It can't handle circular references. [plain-object-clone](https://www.npmjs.com/package/plain-object-clone) is also really limited in capability.
+
+## Tests
+
+```sh
+npm test
+```
+
+```
+169 passing (342.514ms)
+```
+
+### Coverage
+
+```sh
+npm run cov
+```
+
+```
+----------|----------|----------|----------|----------|-------------------|
+File      |  % Stmts | % Branch |  % Funcs |  % Lines | Uncovered Line #s |
+----------|----------|----------|----------|----------|-------------------|
+All files |      100 |      100 |      100 |      100 |                   |
+ index.js |      100 |      100 |      100 |      100 |                   |
+----------|----------|----------|----------|----------|-------------------|
+```
+
+### `__proto__` own property copying
+
+`rfdc` works the same way as `Object.assign` when it comes to copying `['__proto__']` (e.g. when
+an object has an own property key called '__proto__'). It results in the target object 
+prototype object being set per the value of the `['__proto__']` own property.
+
+For detailed write-up on how a way to handle this security-wise see https://www.fastify.io/docs/latest/Guides/Prototype-Poisoning/.
+
+## License
+
+MIT
diff --git a/mqtt-backend/node_modules/rfdc/test/index.js b/mqtt-backend/node_modules/rfdc/test/index.js
new file mode 100644
index 0000000..5bdd9ac
--- /dev/null
+++ b/mqtt-backend/node_modules/rfdc/test/index.js
@@ -0,0 +1,306 @@
+'use strict'
+
+const { test } = require('tap')
+const rfdc = require('..')
+const cloneDefault = require('../default')
+const clone = rfdc()
+const cloneProto = rfdc({ proto: true })
+const cloneCircles = rfdc({ circles: true })
+const cloneCirclesProto = rfdc({ circles: true, proto: true })
+
+const rnd = (max) => Math.round(Math.random() * max)
+
+types(clone, 'default')
+types(cloneProto, 'proto option')
+types(cloneCircles, 'circles option')
+types(cloneCirclesProto, 'circles and proto option')
+
+test('default – does not copy proto properties', async ({ is }) => {
+  is(clone(Object.create({ a: 1 })).a, undefined, 'value not copied')
+})
+test('default – shorthand import', async ({ same }) => {
+  same(
+    clone(Object.create({ a: 1 })),
+    cloneDefault(Object.create({ a: 1 })),
+    'import equals clone with default options'
+  )
+})
+test('proto option – copies enumerable proto properties', async ({ is }) => {
+  is(cloneProto(Object.create({ a: 1 })).a, 1, 'value copied')
+})
+test('circles option - circular object', async ({ same, is, isNot }) => {
+  const o = { nest: { a: 1, b: 2 } }
+  o.circular = o
+  same(cloneCircles(o), o, 'same values')
+  isNot(cloneCircles(o), o, 'different objects')
+  isNot(cloneCircles(o).nest, o.nest, 'different nested objects')
+  const c = cloneCircles(o)
+  is(c.circular, c, 'circular references point to copied parent')
+  isNot(c.circular, o, 'circular references do not point to original parent')
+})
+test('circles option – deep circular object', async ({ same, is, isNot }) => {
+  const o = { nest: { a: 1, b: 2 } }
+  o.nest.circular = o
+  same(cloneCircles(o), o, 'same values')
+  isNot(cloneCircles(o), o, 'different objects')
+  isNot(cloneCircles(o).nest, o.nest, 'different nested objects')
+  const c = cloneCircles(o)
+  is(c.nest.circular, c, 'circular references point to copied parent')
+  isNot(
+    c.nest.circular,
+    o,
+    'circular references do not point to original parent'
+  )
+})
+test('circles option alone – does not copy proto properties', async ({
+  is
+}) => {
+  is(cloneCircles(Object.create({ a: 1 })).a, undefined, 'value not copied')
+})
+test('circles and proto option – copies enumerable proto properties', async ({
+  is
+}) => {
+  is(cloneCirclesProto(Object.create({ a: 1 })).a, 1, 'value copied')
+})
+test('circles and proto option - circular object', async ({
+  same,
+  is,
+  isNot
+}) => {
+  const o = { nest: { a: 1, b: 2 } }
+  o.circular = o
+  same(cloneCirclesProto(o), o, 'same values')
+  isNot(cloneCirclesProto(o), o, 'different objects')
+  isNot(cloneCirclesProto(o).nest, o.nest, 'different nested objects')
+  const c = cloneCirclesProto(o)
+  is(c.circular, c, 'circular references point to copied parent')
+  isNot(c.circular, o, 'circular references do not point to original parent')
+})
+test('circles and proto option – deep circular object', async ({
+  same,
+  is,
+  isNot
+}) => {
+  const o = { nest: { a: 1, b: 2 } }
+  o.nest.circular = o
+  same(cloneCirclesProto(o), o, 'same values')
+  isNot(cloneCirclesProto(o), o, 'different objects')
+  isNot(cloneCirclesProto(o).nest, o.nest, 'different nested objects')
+  const c = cloneCirclesProto(o)
+  is(c.nest.circular, c, 'circular references point to copied parent')
+  isNot(
+    c.nest.circular,
+    o,
+    'circular references do not point to original parent'
+  )
+})
+test('circles and proto option – deep circular array', async ({
+  same,
+  is,
+  isNot
+}) => {
+  const o = { nest: [1, 2] }
+  o.nest.push(o)
+  same(cloneCirclesProto(o), o, 'same values')
+  isNot(cloneCirclesProto(o), o, 'different objects')
+  isNot(cloneCirclesProto(o).nest, o.nest, 'different nested objects')
+  const c = cloneCirclesProto(o)
+  is(c.nest[2], c, 'circular references point to copied parent')
+  isNot(c.nest[2], o, 'circular references do not point to original parent')
+})
+test('custom constructor handler', async ({ same, ok, isNot }) => {
+  class Foo {
+    constructor (s) {
+      this.s = s
+    }
+  }
+  const data = { foo: new Foo('foo') }
+  const cloned = rfdc({ constructorHandlers: [[Foo, (o) => new Foo(o.s)]] })(data)
+  ok(cloned.foo instanceof Foo)
+  same(cloned.foo.s, data.foo.s, 'same values')
+  isNot(cloned.foo, data.foo, 'different objects')
+})
+test('custom RegExp handler', async ({ same, ok, isNot }) => {
+  const data = { regex: /foo/ }
+  const cloned = rfdc({ constructorHandlers: [[RegExp, (o) => new RegExp(o)]] })(data)
+  isNot(cloned.regex, data.regex, 'different objects')
+  ok(cloned.regex.test('foo'))
+})
+
+function types (clone, label) {
+  test(label + ' – number', async ({ is }) => {
+    is(clone(42), 42, 'same value')
+  })
+  test(label + ' – string', async ({ is }) => {
+    is(clone('str'), 'str', 'same value')
+  })
+  test(label + ' – boolean', async ({ is }) => {
+    is(clone(true), true, 'same value')
+  })
+  test(label + ' – function', async ({ is }) => {
+    const fn = () => {}
+    is(clone(fn), fn, 'same function')
+  })
+  test(label + ' – async function', async ({ is }) => {
+    const fn = async () => {}
+    is(clone(fn), fn, 'same function')
+  })
+  test(label + ' – generator function', async ({ is }) => {
+    const fn = function * () {}
+    is(clone(fn), fn, 'same function')
+  })
+  test(label + ' – date', async ({ is, isNot }) => {
+    const date = new Date()
+    is(+clone(date), +date, 'same value')
+    isNot(clone(date), date, 'different object')
+  })
+  test(label + ' – null', async ({ is }) => {
+    is(clone(null), null, 'same value')
+  })
+  test(label + ' – shallow object', async ({ same, isNot }) => {
+    const o = { a: 1, b: 2 }
+    same(clone(o), o, 'same values')
+    isNot(clone(o), o, 'different object')
+  })
+  test(label + ' – shallow array', async ({ same, isNot }) => {
+    const o = [1, 2]
+    same(clone(o), o, 'same values')
+    isNot(clone(o), o, 'different arrays')
+  })
+  test(label + ' – deep object', async ({ same, isNot }) => {
+    const o = { nest: { a: 1, b: 2 } }
+    same(clone(o), o, 'same values')
+    isNot(clone(o), o, 'different objects')
+    isNot(clone(o).nest, o.nest, 'different nested objects')
+  })
+  test(label + ' – deep array', async ({ same, isNot }) => {
+    const o = [{ a: 1, b: 2 }, [3]]
+    same(clone(o), o, 'same values')
+    isNot(clone(o), o, 'different arrays')
+    isNot(clone(o)[0], o[0], 'different array elements')
+    isNot(clone(o)[1], o[1], 'different array elements')
+  })
+  test(label + ' – nested number', async ({ is }) => {
+    is(clone({ a: 1 }).a, 1, 'same value')
+  })
+  test(label + ' – nested string', async ({ is }) => {
+    is(clone({ s: 'str' }).s, 'str', 'same value')
+  })
+  test(label + ' – nested boolean', async ({ is }) => {
+    is(clone({ b: true }).b, true, 'same value')
+  })
+  test(label + ' – nested function', async ({ is }) => {
+    const fn = () => {}
+    is(clone({ fn }).fn, fn, 'same function')
+  })
+  test(label + ' – nested async function', async ({ is }) => {
+    const fn = async () => {}
+    is(clone({ fn }).fn, fn, 'same function')
+  })
+  test(label + ' – nested generator function', async ({ is }) => {
+    const fn = function * () {}
+    is(clone({ fn }).fn, fn, 'same function')
+  })
+  test(label + ' – nested date', async ({ is, isNot }) => {
+    const date = new Date()
+    is(+clone({ d: date }).d, +date, 'same value')
+    isNot(clone({ d: date }).d, date, 'different object')
+  })
+  test(label + ' – nested date in array', async ({ is, isNot }) => {
+    const date = new Date()
+    is(+clone({ d: [date] }).d[0], +date, 'same value')
+    isNot(clone({ d: [date] }).d[0], date, 'different object')
+    is(+cloneCircles({ d: [date] }).d[0], +date, 'same value')
+    isNot(cloneCircles({ d: [date] }).d, date, 'different object')
+  })
+  test(label + ' – nested null', async ({ is }) => {
+    is(clone({ n: null }).n, null, 'same value')
+  })
+  test(label + ' – arguments', async ({ isNot, same }) => {
+    function fn (...args) {
+      same(clone(arguments), args, 'same values')
+      isNot(clone(arguments), arguments, 'different object')
+    }
+    fn(1, 2, 3)
+  })
+  test(`${label} copies buffers from object correctly`, async ({ ok, is, isNot }) => {
+    const input = Date.now().toString(36)
+    const inputBuffer = Buffer.from(input)
+    const clonedBuffer = clone({ a: inputBuffer }).a
+    ok(Buffer.isBuffer(clonedBuffer), 'cloned value is buffer')
+    isNot(clonedBuffer, inputBuffer, 'cloned buffer is not same as input buffer')
+    is(clonedBuffer.toString(), input, 'cloned buffer content is correct')
+  })
+  test(`${label} copies buffers from arrays correctly`, async ({ ok, is, isNot }) => {
+    const input = Date.now().toString(36)
+    const inputBuffer = Buffer.from(input)
+    const [clonedBuffer] = clone([inputBuffer])
+    ok(Buffer.isBuffer(clonedBuffer), 'cloned value is buffer')
+    isNot(clonedBuffer, inputBuffer, 'cloned buffer is not same as input buffer')
+    is(clonedBuffer.toString(), input, 'cloned buffer content is correct')
+  })
+  test(`${label} copies TypedArrays from object correctly`, async ({ ok, is, isNot }) => {
+    const [input1, input2] = [rnd(10), rnd(10)]
+    const buffer = new ArrayBuffer(8)
+    const int32View = new Int32Array(buffer)
+    int32View[0] = input1
+    int32View[1] = input2
+    const cloned = clone({ a: int32View }).a
+    ok(cloned instanceof Int32Array, 'cloned value is instance of class')
+    isNot(cloned, int32View, 'cloned value is not same as input value')
+    is(cloned[0], input1, 'cloned value content is correct')
+    is(cloned[1], input2, 'cloned value content is correct')
+  })
+  test(`${label} copies TypedArrays from array correctly`, async ({ ok, is, isNot }) => {
+    const [input1, input2] = [rnd(10), rnd(10)]
+    const buffer = new ArrayBuffer(16)
+    const int32View = new Int32Array(buffer)
+    int32View[0] = input1
+    int32View[1] = input2
+    const [cloned] = clone([int32View])
+    ok(cloned instanceof Int32Array, 'cloned value is instance of class')
+    isNot(cloned, int32View, 'cloned value is not same as input value')
+    is(cloned[0], input1, 'cloned value content is correct')
+    is(cloned[1], input2, 'cloned value content is correct')
+  })
+  test(`${label} copies complex TypedArrays`, async ({ ok, deepEqual, is, isNot }) => {
+    const [input1, input2, input3] = [rnd(10), rnd(10), rnd(10)]
+    const buffer = new ArrayBuffer(4)
+    const view1 = new Int8Array(buffer, 0, 2)
+    const view2 = new Int8Array(buffer, 2, 2)
+    const view3 = new Int8Array(buffer)
+    view1[0] = input1
+    view2[0] = input2
+    view3[3] = input3
+    const cloned = clone({ view1, view2, view3 })
+    ok(cloned.view1 instanceof Int8Array, 'cloned value is instance of class')
+    ok(cloned.view2 instanceof Int8Array, 'cloned value is instance of class')
+    ok(cloned.view3 instanceof Int8Array, 'cloned value is instance of class')
+    isNot(cloned.view1, view1, 'cloned value is not same as input value')
+    isNot(cloned.view2, view2, 'cloned value is not same as input value')
+    isNot(cloned.view3, view3, 'cloned value is not same as input value')
+    deepEqual(Array.from(cloned.view1), [input1, 0], 'cloned value content is correct')
+    deepEqual(Array.from(cloned.view2), [input2, input3], 'cloned value content is correct')
+    deepEqual(Array.from(cloned.view3), [input1, 0, input2, input3], 'cloned value content is correct')
+  })
+  test(`${label} - maps`, async ({ same, isNot }) => {
+    const map = new Map([['a', 1]])
+    same(Array.from(clone(map)), [['a', 1]], 'same value')
+    isNot(clone(map), map, 'different object')
+  })
+  test(`${label} - sets`, async ({ same, isNot }) => {
+    const set = new Set([1])
+    same(Array.from(clone(set)), [1])
+    isNot(clone(set), set, 'different object')
+  })
+  test(`${label} - nested maps`, async ({ same, isNot }) => {
+    const data = { m: new Map([['a', 1]]) }
+    same(Array.from(clone(data).m), [['a', 1]], 'same value')
+    isNot(clone(data).m, data.m, 'different object')
+  })
+  test(`${label} - nested sets`, async ({ same, isNot }) => {
+    const data = { s: new Set([1]) }
+    same(Array.from(clone(data).s), [1], 'same value')
+    isNot(clone(data).s, data.s, 'different object')
+  })
+}
diff --git a/mqtt-backend/node_modules/safe-buffer/LICENSE b/mqtt-backend/node_modules/safe-buffer/LICENSE
new file mode 100644
index 0000000..0c068ce
--- /dev/null
+++ b/mqtt-backend/node_modules/safe-buffer/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) Feross Aboukhadijeh
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/safe-buffer/README.md b/mqtt-backend/node_modules/safe-buffer/README.md
new file mode 100644
index 0000000..e9a81af
--- /dev/null
+++ b/mqtt-backend/node_modules/safe-buffer/README.md
@@ -0,0 +1,584 @@
+# safe-buffer [![travis][travis-image]][travis-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url] [![javascript style guide][standard-image]][standard-url]
+
+[travis-image]: https://img.shields.io/travis/feross/safe-buffer/master.svg
+[travis-url]: https://travis-ci.org/feross/safe-buffer
+[npm-image]: https://img.shields.io/npm/v/safe-buffer.svg
+[npm-url]: https://npmjs.org/package/safe-buffer
+[downloads-image]: https://img.shields.io/npm/dm/safe-buffer.svg
+[downloads-url]: https://npmjs.org/package/safe-buffer
+[standard-image]: https://img.shields.io/badge/code_style-standard-brightgreen.svg
+[standard-url]: https://standardjs.com
+
+#### Safer Node.js Buffer API
+
+**Use the new Node.js Buffer APIs (`Buffer.from`, `Buffer.alloc`,
+`Buffer.allocUnsafe`, `Buffer.allocUnsafeSlow`) in all versions of Node.js.**
+
+**Uses the built-in implementation when available.**
+
+## install
+
+```
+npm install safe-buffer
+```
+
+## usage
+
+The goal of this package is to provide a safe replacement for the node.js `Buffer`.
+
+It's a drop-in replacement for `Buffer`. You can use it by adding one `require` line to
+the top of your node.js modules:
+
+```js
+var Buffer = require('safe-buffer').Buffer
+
+// Existing buffer code will continue to work without issues:
+
+new Buffer('hey', 'utf8')
+new Buffer([1, 2, 3], 'utf8')
+new Buffer(obj)
+new Buffer(16) // create an uninitialized buffer (potentially unsafe)
+
+// But you can use these new explicit APIs to make clear what you want:
+
+Buffer.from('hey', 'utf8') // convert from many types to a Buffer
+Buffer.alloc(16) // create a zero-filled buffer (safe)
+Buffer.allocUnsafe(16) // create an uninitialized buffer (potentially unsafe)
+```
+
+## api
+
+### Class Method: Buffer.from(array)
+<!-- YAML
+added: v3.0.0
+-->
+
+* `array` {Array}
+
+Allocates a new `Buffer` using an `array` of octets.
+
+```js
+const buf = Buffer.from([0x62,0x75,0x66,0x66,0x65,0x72]);
+  // creates a new Buffer containing ASCII bytes
+  // ['b','u','f','f','e','r']
+```
+
+A `TypeError` will be thrown if `array` is not an `Array`.
+
+### Class Method: Buffer.from(arrayBuffer[, byteOffset[, length]])
+<!-- YAML
+added: v5.10.0
+-->
+
+* `arrayBuffer` {ArrayBuffer} The `.buffer` property of a `TypedArray` or
+  a `new ArrayBuffer()`
+* `byteOffset` {Number} Default: `0`
+* `length` {Number} Default: `arrayBuffer.length - byteOffset`
+
+When passed a reference to the `.buffer` property of a `TypedArray` instance,
+the newly created `Buffer` will share the same allocated memory as the
+TypedArray.
+
+```js
+const arr = new Uint16Array(2);
+arr[0] = 5000;
+arr[1] = 4000;
+
+const buf = Buffer.from(arr.buffer); // shares the memory with arr;
+
+console.log(buf);
+  // Prints: <Buffer 88 13 a0 0f>
+
+// changing the TypedArray changes the Buffer also
+arr[1] = 6000;
+
+console.log(buf);
+  // Prints: <Buffer 88 13 70 17>
+```
+
+The optional `byteOffset` and `length` arguments specify a memory range within
+the `arrayBuffer` that will be shared by the `Buffer`.
+
+```js
+const ab = new ArrayBuffer(10);
+const buf = Buffer.from(ab, 0, 2);
+console.log(buf.length);
+  // Prints: 2
+```
+
+A `TypeError` will be thrown if `arrayBuffer` is not an `ArrayBuffer`.
+
+### Class Method: Buffer.from(buffer)
+<!-- YAML
+added: v3.0.0
+-->
+
+* `buffer` {Buffer}
+
+Copies the passed `buffer` data onto a new `Buffer` instance.
+
+```js
+const buf1 = Buffer.from('buffer');
+const buf2 = Buffer.from(buf1);
+
+buf1[0] = 0x61;
+console.log(buf1.toString());
+  // 'auffer'
+console.log(buf2.toString());
+  // 'buffer' (copy is not changed)
+```
+
+A `TypeError` will be thrown if `buffer` is not a `Buffer`.
+
+### Class Method: Buffer.from(str[, encoding])
+<!-- YAML
+added: v5.10.0
+-->
+
+* `str` {String} String to encode.
+* `encoding` {String} Encoding to use, Default: `'utf8'`
+
+Creates a new `Buffer` containing the given JavaScript string `str`. If
+provided, the `encoding` parameter identifies the character encoding.
+If not provided, `encoding` defaults to `'utf8'`.
+
+```js
+const buf1 = Buffer.from('this is a tést');
+console.log(buf1.toString());
+  // prints: this is a tést
+console.log(buf1.toString('ascii'));
+  // prints: this is a tC)st
+
+const buf2 = Buffer.from('7468697320697320612074c3a97374', 'hex');
+console.log(buf2.toString());
+  // prints: this is a tést
+```
+
+A `TypeError` will be thrown if `str` is not a string.
+
+### Class Method: Buffer.alloc(size[, fill[, encoding]])
+<!-- YAML
+added: v5.10.0
+-->
+
+* `size` {Number}
+* `fill` {Value} Default: `undefined`
+* `encoding` {String} Default: `utf8`
+
+Allocates a new `Buffer` of `size` bytes. If `fill` is `undefined`, the
+`Buffer` will be *zero-filled*.
+
+```js
+const buf = Buffer.alloc(5);
+console.log(buf);
+  // <Buffer 00 00 00 00 00>
+```
+
+The `size` must be less than or equal to the value of
+`require('buffer').kMaxLength` (on 64-bit architectures, `kMaxLength` is
+`(2^31)-1`). Otherwise, a [`RangeError`][] is thrown. A zero-length Buffer will
+be created if a `size` less than or equal to 0 is specified.
+
+If `fill` is specified, the allocated `Buffer` will be initialized by calling
+`buf.fill(fill)`. See [`buf.fill()`][] for more information.
+
+```js
+const buf = Buffer.alloc(5, 'a');
+console.log(buf);
+  // <Buffer 61 61 61 61 61>
+```
+
+If both `fill` and `encoding` are specified, the allocated `Buffer` will be
+initialized by calling `buf.fill(fill, encoding)`. For example:
+
+```js
+const buf = Buffer.alloc(11, 'aGVsbG8gd29ybGQ=', 'base64');
+console.log(buf);
+  // <Buffer 68 65 6c 6c 6f 20 77 6f 72 6c 64>
+```
+
+Calling `Buffer.alloc(size)` can be significantly slower than the alternative
+`Buffer.allocUnsafe(size)` but ensures that the newly created `Buffer` instance
+contents will *never contain sensitive data*.
+
+A `TypeError` will be thrown if `size` is not a number.
+
+### Class Method: Buffer.allocUnsafe(size)
+<!-- YAML
+added: v5.10.0
+-->
+
+* `size` {Number}
+
+Allocates a new *non-zero-filled* `Buffer` of `size` bytes.  The `size` must
+be less than or equal to the value of `require('buffer').kMaxLength` (on 64-bit
+architectures, `kMaxLength` is `(2^31)-1`). Otherwise, a [`RangeError`][] is
+thrown. A zero-length Buffer will be created if a `size` less than or equal to
+0 is specified.
+
+The underlying memory for `Buffer` instances created in this way is *not
+initialized*. The contents of the newly created `Buffer` are unknown and
+*may contain sensitive data*. Use [`buf.fill(0)`][] to initialize such
+`Buffer` instances to zeroes.
+
+```js
+const buf = Buffer.allocUnsafe(5);
+console.log(buf);
+  // <Buffer 78 e0 82 02 01>
+  // (octets will be different, every time)
+buf.fill(0);
+console.log(buf);
+  // <Buffer 00 00 00 00 00>
+```
+
+A `TypeError` will be thrown if `size` is not a number.
+
+Note that the `Buffer` module pre-allocates an internal `Buffer` instance of
+size `Buffer.poolSize` that is used as a pool for the fast allocation of new
+`Buffer` instances created using `Buffer.allocUnsafe(size)` (and the deprecated
+`new Buffer(size)` constructor) only when `size` is less than or equal to
+`Buffer.poolSize >> 1` (floor of `Buffer.poolSize` divided by two). The default
+value of `Buffer.poolSize` is `8192` but can be modified.
+
+Use of this pre-allocated internal memory pool is a key difference between
+calling `Buffer.alloc(size, fill)` vs. `Buffer.allocUnsafe(size).fill(fill)`.
+Specifically, `Buffer.alloc(size, fill)` will *never* use the internal Buffer
+pool, while `Buffer.allocUnsafe(size).fill(fill)` *will* use the internal
+Buffer pool if `size` is less than or equal to half `Buffer.poolSize`. The
+difference is subtle but can be important when an application requires the
+additional performance that `Buffer.allocUnsafe(size)` provides.
+
+### Class Method: Buffer.allocUnsafeSlow(size)
+<!-- YAML
+added: v5.10.0
+-->
+
+* `size` {Number}
+
+Allocates a new *non-zero-filled* and non-pooled `Buffer` of `size` bytes.  The
+`size` must be less than or equal to the value of
+`require('buffer').kMaxLength` (on 64-bit architectures, `kMaxLength` is
+`(2^31)-1`). Otherwise, a [`RangeError`][] is thrown. A zero-length Buffer will
+be created if a `size` less than or equal to 0 is specified.
+
+The underlying memory for `Buffer` instances created in this way is *not
+initialized*. The contents of the newly created `Buffer` are unknown and
+*may contain sensitive data*. Use [`buf.fill(0)`][] to initialize such
+`Buffer` instances to zeroes.
+
+When using `Buffer.allocUnsafe()` to allocate new `Buffer` instances,
+allocations under 4KB are, by default, sliced from a single pre-allocated
+`Buffer`. This allows applications to avoid the garbage collection overhead of
+creating many individually allocated Buffers. This approach improves both
+performance and memory usage by eliminating the need to track and cleanup as
+many `Persistent` objects.
+
+However, in the case where a developer may need to retain a small chunk of
+memory from a pool for an indeterminate amount of time, it may be appropriate
+to create an un-pooled Buffer instance using `Buffer.allocUnsafeSlow()` then
+copy out the relevant bits.
+
+```js
+// need to keep around a few small chunks of memory
+const store = [];
+
+socket.on('readable', () => {
+  const data = socket.read();
+  // allocate for retained data
+  const sb = Buffer.allocUnsafeSlow(10);
+  // copy the data into the new allocation
+  data.copy(sb, 0, 0, 10);
+  store.push(sb);
+});
+```
+
+Use of `Buffer.allocUnsafeSlow()` should be used only as a last resort *after*
+a developer has observed undue memory retention in their applications.
+
+A `TypeError` will be thrown if `size` is not a number.
+
+### All the Rest
+
+The rest of the `Buffer` API is exactly the same as in node.js.
+[See the docs](https://nodejs.org/api/buffer.html).
+
+
+## Related links
+
+- [Node.js issue: Buffer(number) is unsafe](https://github.com/nodejs/node/issues/4660)
+- [Node.js Enhancement Proposal: Buffer.from/Buffer.alloc/Buffer.zalloc/Buffer() soft-deprecate](https://github.com/nodejs/node-eps/pull/4)
+
+## Why is `Buffer` unsafe?
+
+Today, the node.js `Buffer` constructor is overloaded to handle many different argument
+types like `String`, `Array`, `Object`, `TypedArrayView` (`Uint8Array`, etc.),
+`ArrayBuffer`, and also `Number`.
+
+The API is optimized for convenience: you can throw any type at it, and it will try to do
+what you want.
+
+Because the Buffer constructor is so powerful, you often see code like this:
+
+```js
+// Convert UTF-8 strings to hex
+function toHex (str) {
+  return new Buffer(str).toString('hex')
+}
+```
+
+***But what happens if `toHex` is called with a `Number` argument?***
+
+### Remote Memory Disclosure
+
+If an attacker can make your program call the `Buffer` constructor with a `Number`
+argument, then they can make it allocate uninitialized memory from the node.js process.
+This could potentially disclose TLS private keys, user data, or database passwords.
+
+When the `Buffer` constructor is passed a `Number` argument, it returns an
+**UNINITIALIZED** block of memory of the specified `size`. When you create a `Buffer` like
+this, you **MUST** overwrite the contents before returning it to the user.
+
+From the [node.js docs](https://nodejs.org/api/buffer.html#buffer_new_buffer_size):
+
+> `new Buffer(size)`
+>
+> - `size` Number
+>
+> The underlying memory for `Buffer` instances created in this way is not initialized.
+> **The contents of a newly created `Buffer` are unknown and could contain sensitive
+> data.** Use `buf.fill(0)` to initialize a Buffer to zeroes.
+
+(Emphasis our own.)
+
+Whenever the programmer intended to create an uninitialized `Buffer` you often see code
+like this:
+
+```js
+var buf = new Buffer(16)
+
+// Immediately overwrite the uninitialized buffer with data from another buffer
+for (var i = 0; i < buf.length; i++) {
+  buf[i] = otherBuf[i]
+}
+```
+
+
+### Would this ever be a problem in real code?
+
+Yes. It's surprisingly common to forget to check the type of your variables in a
+dynamically-typed language like JavaScript.
+
+Usually the consequences of assuming the wrong type is that your program crashes with an
+uncaught exception. But the failure mode for forgetting to check the type of arguments to
+the `Buffer` constructor is more catastrophic.
+
+Here's an example of a vulnerable service that takes a JSON payload and converts it to
+hex:
+
+```js
+// Take a JSON payload {str: "some string"} and convert it to hex
+var server = http.createServer(function (req, res) {
+  var data = ''
+  req.setEncoding('utf8')
+  req.on('data', function (chunk) {
+    data += chunk
+  })
+  req.on('end', function () {
+    var body = JSON.parse(data)
+    res.end(new Buffer(body.str).toString('hex'))
+  })
+})
+
+server.listen(8080)
+```
+
+In this example, an http client just has to send:
+
+```json
+{
+  "str": 1000
+}
+```
+
+and it will get back 1,000 bytes of uninitialized memory from the server.
+
+This is a very serious bug. It's similar in severity to the
+[the Heartbleed bug](http://heartbleed.com/) that allowed disclosure of OpenSSL process
+memory by remote attackers.
+
+
+### Which real-world packages were vulnerable?
+
+#### [`bittorrent-dht`](https://www.npmjs.com/package/bittorrent-dht)
+
+[Mathias Buus](https://github.com/mafintosh) and I
+([Feross Aboukhadijeh](http://feross.org/)) found this issue in one of our own packages,
+[`bittorrent-dht`](https://www.npmjs.com/package/bittorrent-dht). The bug would allow
+anyone on the internet to send a series of messages to a user of `bittorrent-dht` and get
+them to reveal 20 bytes at a time of uninitialized memory from the node.js process.
+
+Here's
+[the commit](https://github.com/feross/bittorrent-dht/commit/6c7da04025d5633699800a99ec3fbadf70ad35b8)
+that fixed it. We released a new fixed version, created a
+[Node Security Project disclosure](https://nodesecurity.io/advisories/68), and deprecated all
+vulnerable versions on npm so users will get a warning to upgrade to a newer version.
+
+#### [`ws`](https://www.npmjs.com/package/ws)
+
+That got us wondering if there were other vulnerable packages. Sure enough, within a short
+period of time, we found the same issue in [`ws`](https://www.npmjs.com/package/ws), the
+most popular WebSocket implementation in node.js.
+
+If certain APIs were called with `Number` parameters instead of `String` or `Buffer` as
+expected, then uninitialized server memory would be disclosed to the remote peer.
+
+These were the vulnerable methods:
+
+```js
+socket.send(number)
+socket.ping(number)
+socket.pong(number)
+```
+
+Here's a vulnerable socket server with some echo functionality:
+
+```js
+server.on('connection', function (socket) {
+  socket.on('message', function (message) {
+    message = JSON.parse(message)
+    if (message.type === 'echo') {
+      socket.send(message.data) // send back the user's message
+    }
+  })
+})
+```
+
+`socket.send(number)` called on the server, will disclose server memory.
+
+Here's [the release](https://github.com/websockets/ws/releases/tag/1.0.1) where the issue
+was fixed, with a more detailed explanation. Props to
+[Arnout Kazemier](https://github.com/3rd-Eden) for the quick fix. Here's the
+[Node Security Project disclosure](https://nodesecurity.io/advisories/67).
+
+
+### What's the solution?
+
+It's important that node.js offers a fast way to get memory otherwise performance-critical
+applications would needlessly get a lot slower.
+
+But we need a better way to *signal our intent* as programmers. **When we want
+uninitialized memory, we should request it explicitly.**
+
+Sensitive functionality should not be packed into a developer-friendly API that loosely
+accepts many different types. This type of API encourages the lazy practice of passing
+variables in without checking the type very carefully.
+
+#### A new API: `Buffer.allocUnsafe(number)`
+
+The functionality of creating buffers with uninitialized memory should be part of another
+API. We propose `Buffer.allocUnsafe(number)`. This way, it's not part of an API that
+frequently gets user input of all sorts of different types passed into it.
+
+```js
+var buf = Buffer.allocUnsafe(16) // careful, uninitialized memory!
+
+// Immediately overwrite the uninitialized buffer with data from another buffer
+for (var i = 0; i < buf.length; i++) {
+  buf[i] = otherBuf[i]
+}
+```
+
+
+### How do we fix node.js core?
+
+We sent [a PR to node.js core](https://github.com/nodejs/node/pull/4514) (merged as
+`semver-major`) which defends against one case:
+
+```js
+var str = 16
+new Buffer(str, 'utf8')
+```
+
+In this situation, it's implied that the programmer intended the first argument to be a
+string, since they passed an encoding as a second argument. Today, node.js will allocate
+uninitialized memory in the case of `new Buffer(number, encoding)`, which is probably not
+what the programmer intended.
+
+But this is only a partial solution, since if the programmer does `new Buffer(variable)`
+(without an `encoding` parameter) there's no way to know what they intended. If `variable`
+is sometimes a number, then uninitialized memory will sometimes be returned.
+
+### What's the real long-term fix?
+
+We could deprecate and remove `new Buffer(number)` and use `Buffer.allocUnsafe(number)` when
+we need uninitialized memory. But that would break 1000s of packages.
+
+~~We believe the best solution is to:~~
+
+~~1. Change `new Buffer(number)` to return safe, zeroed-out memory~~
+
+~~2. Create a new API for creating uninitialized Buffers. We propose: `Buffer.allocUnsafe(number)`~~
+
+#### Update
+
+We now support adding three new APIs:
+
+- `Buffer.from(value)` - convert from any type to a buffer
+- `Buffer.alloc(size)` - create a zero-filled buffer
+- `Buffer.allocUnsafe(size)` - create an uninitialized buffer with given size
+
+This solves the core problem that affected `ws` and `bittorrent-dht` which is
+`Buffer(variable)` getting tricked into taking a number argument.
+
+This way, existing code continues working and the impact on the npm ecosystem will be
+minimal. Over time, npm maintainers can migrate performance-critical code to use
+`Buffer.allocUnsafe(number)` instead of `new Buffer(number)`.
+
+
+### Conclusion
+
+We think there's a serious design issue with the `Buffer` API as it exists today. It
+promotes insecure software by putting high-risk functionality into a convenient API
+with friendly "developer ergonomics".
+
+This wasn't merely a theoretical exercise because we found the issue in some of the
+most popular npm packages.
+
+Fortunately, there's an easy fix that can be applied today. Use `safe-buffer` in place of
+`buffer`.
+
+```js
+var Buffer = require('safe-buffer').Buffer
+```
+
+Eventually, we hope that node.js core can switch to this new, safer behavior. We believe
+the impact on the ecosystem would be minimal since it's not a breaking change.
+Well-maintained, popular packages would be updated to use `Buffer.alloc` quickly, while
+older, insecure packages would magically become safe from this attack vector.
+
+
+## links
+
+- [Node.js PR: buffer: throw if both length and enc are passed](https://github.com/nodejs/node/pull/4514)
+- [Node Security Project disclosure for `ws`](https://nodesecurity.io/advisories/67)
+- [Node Security Project disclosure for`bittorrent-dht`](https://nodesecurity.io/advisories/68)
+
+
+## credit
+
+The original issues in `bittorrent-dht`
+([disclosure](https://nodesecurity.io/advisories/68)) and
+`ws` ([disclosure](https://nodesecurity.io/advisories/67)) were discovered by
+[Mathias Buus](https://github.com/mafintosh) and
+[Feross Aboukhadijeh](http://feross.org/).
+
+Thanks to [Adam Baldwin](https://github.com/evilpacket) for helping disclose these issues
+and for his work running the [Node Security Project](https://nodesecurity.io/).
+
+Thanks to [John Hiesey](https://github.com/jhiesey) for proofreading this README and
+auditing the code.
+
+
+## license
+
+MIT. Copyright (C) [Feross Aboukhadijeh](http://feross.org)
diff --git a/mqtt-backend/node_modules/safe-buffer/index.d.ts b/mqtt-backend/node_modules/safe-buffer/index.d.ts
new file mode 100644
index 0000000..e9fed80
--- /dev/null
+++ b/mqtt-backend/node_modules/safe-buffer/index.d.ts
@@ -0,0 +1,187 @@
+declare module "safe-buffer" {
+  export class Buffer {
+    length: number
+    write(string: string, offset?: number, length?: number, encoding?: string): number;
+    toString(encoding?: string, start?: number, end?: number): string;
+    toJSON(): { type: 'Buffer', data: any[] };
+    equals(otherBuffer: Buffer): boolean;
+    compare(otherBuffer: Buffer, targetStart?: number, targetEnd?: number, sourceStart?: number, sourceEnd?: number): number;
+    copy(targetBuffer: Buffer, targetStart?: number, sourceStart?: number, sourceEnd?: number): number;
+    slice(start?: number, end?: number): Buffer;
+    writeUIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeUIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeIntLE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    writeIntBE(value: number, offset: number, byteLength: number, noAssert?: boolean): number;
+    readUIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readUIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readIntLE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readIntBE(offset: number, byteLength: number, noAssert?: boolean): number;
+    readUInt8(offset: number, noAssert?: boolean): number;
+    readUInt16LE(offset: number, noAssert?: boolean): number;
+    readUInt16BE(offset: number, noAssert?: boolean): number;
+    readUInt32LE(offset: number, noAssert?: boolean): number;
+    readUInt32BE(offset: number, noAssert?: boolean): number;
+    readInt8(offset: number, noAssert?: boolean): number;
+    readInt16LE(offset: number, noAssert?: boolean): number;
+    readInt16BE(offset: number, noAssert?: boolean): number;
+    readInt32LE(offset: number, noAssert?: boolean): number;
+    readInt32BE(offset: number, noAssert?: boolean): number;
+    readFloatLE(offset: number, noAssert?: boolean): number;
+    readFloatBE(offset: number, noAssert?: boolean): number;
+    readDoubleLE(offset: number, noAssert?: boolean): number;
+    readDoubleBE(offset: number, noAssert?: boolean): number;
+    swap16(): Buffer;
+    swap32(): Buffer;
+    swap64(): Buffer;
+    writeUInt8(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt16LE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt16BE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt32LE(value: number, offset: number, noAssert?: boolean): number;
+    writeUInt32BE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt8(value: number, offset: number, noAssert?: boolean): number;
+    writeInt16LE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt16BE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt32LE(value: number, offset: number, noAssert?: boolean): number;
+    writeInt32BE(value: number, offset: number, noAssert?: boolean): number;
+    writeFloatLE(value: number, offset: number, noAssert?: boolean): number;
+    writeFloatBE(value: number, offset: number, noAssert?: boolean): number;
+    writeDoubleLE(value: number, offset: number, noAssert?: boolean): number;
+    writeDoubleBE(value: number, offset: number, noAssert?: boolean): number;
+    fill(value: any, offset?: number, end?: number): this;
+    indexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+    lastIndexOf(value: string | number | Buffer, byteOffset?: number, encoding?: string): number;
+    includes(value: string | number | Buffer, byteOffset?: number, encoding?: string): boolean;
+
+    /**
+     * Allocates a new buffer containing the given {str}.
+     *
+     * @param str String to store in buffer.
+     * @param encoding encoding to use, optional.  Default is 'utf8'
+     */
+     constructor (str: string, encoding?: string);
+    /**
+     * Allocates a new buffer of {size} octets.
+     *
+     * @param size count of octets to allocate.
+     */
+    constructor (size: number);
+    /**
+     * Allocates a new buffer containing the given {array} of octets.
+     *
+     * @param array The octets to store.
+     */
+    constructor (array: Uint8Array);
+    /**
+     * Produces a Buffer backed by the same allocated memory as
+     * the given {ArrayBuffer}.
+     *
+     *
+     * @param arrayBuffer The ArrayBuffer with which to share memory.
+     */
+    constructor (arrayBuffer: ArrayBuffer);
+    /**
+     * Allocates a new buffer containing the given {array} of octets.
+     *
+     * @param array The octets to store.
+     */
+    constructor (array: any[]);
+    /**
+     * Copies the passed {buffer} data onto a new {Buffer} instance.
+     *
+     * @param buffer The buffer to copy.
+     */
+    constructor (buffer: Buffer);
+    prototype: Buffer;
+    /**
+     * Allocates a new Buffer using an {array} of octets.
+     *
+     * @param array
+     */
+    static from(array: any[]): Buffer;
+    /**
+     * When passed a reference to the .buffer property of a TypedArray instance,
+     * the newly created Buffer will share the same allocated memory as the TypedArray.
+     * The optional {byteOffset} and {length} arguments specify a memory range
+     * within the {arrayBuffer} that will be shared by the Buffer.
+     *
+     * @param arrayBuffer The .buffer property of a TypedArray or a new ArrayBuffer()
+     * @param byteOffset
+     * @param length
+     */
+    static from(arrayBuffer: ArrayBuffer, byteOffset?: number, length?: number): Buffer;
+    /**
+     * Copies the passed {buffer} data onto a new Buffer instance.
+     *
+     * @param buffer
+     */
+    static from(buffer: Buffer): Buffer;
+    /**
+     * Creates a new Buffer containing the given JavaScript string {str}.
+     * If provided, the {encoding} parameter identifies the character encoding.
+     * If not provided, {encoding} defaults to 'utf8'.
+     *
+     * @param str
+     */
+    static from(str: string, encoding?: string): Buffer;
+    /**
+     * Returns true if {obj} is a Buffer
+     *
+     * @param obj object to test.
+     */
+    static isBuffer(obj: any): obj is Buffer;
+    /**
+     * Returns true if {encoding} is a valid encoding argument.
+     * Valid string encodings in Node 0.12: 'ascii'|'utf8'|'utf16le'|'ucs2'(alias of 'utf16le')|'base64'|'binary'(deprecated)|'hex'
+     *
+     * @param encoding string to test.
+     */
+    static isEncoding(encoding: string): boolean;
+    /**
+     * Gives the actual byte length of a string. encoding defaults to 'utf8'.
+     * This is not the same as String.prototype.length since that returns the number of characters in a string.
+     *
+     * @param string string to test.
+     * @param encoding encoding used to evaluate (defaults to 'utf8')
+     */
+    static byteLength(string: string, encoding?: string): number;
+    /**
+     * Returns a buffer which is the result of concatenating all the buffers in the list together.
+     *
+     * If the list has no items, or if the totalLength is 0, then it returns a zero-length buffer.
+     * If the list has exactly one item, then the first item of the list is returned.
+     * If the list has more than one item, then a new Buffer is created.
+     *
+     * @param list An array of Buffer objects to concatenate
+     * @param totalLength Total length of the buffers when concatenated.
+     *   If totalLength is not provided, it is read from the buffers in the list. However, this adds an additional loop to the function, so it is faster to provide the length explicitly.
+     */
+    static concat(list: Buffer[], totalLength?: number): Buffer;
+    /**
+     * The same as buf1.compare(buf2).
+     */
+    static compare(buf1: Buffer, buf2: Buffer): number;
+    /**
+     * Allocates a new buffer of {size} octets.
+     *
+     * @param size count of octets to allocate.
+     * @param fill if specified, buffer will be initialized by calling buf.fill(fill).
+     *    If parameter is omitted, buffer will be filled with zeros.
+     * @param encoding encoding used for call to buf.fill while initalizing
+     */
+    static alloc(size: number, fill?: string | Buffer | number, encoding?: string): Buffer;
+    /**
+     * Allocates a new buffer of {size} octets, leaving memory not initialized, so the contents
+     * of the newly created Buffer are unknown and may contain sensitive data.
+     *
+     * @param size count of octets to allocate
+     */
+    static allocUnsafe(size: number): Buffer;
+    /**
+     * Allocates a new non-pooled buffer of {size} octets, leaving memory not initialized, so the contents
+     * of the newly created Buffer are unknown and may contain sensitive data.
+     *
+     * @param size count of octets to allocate
+     */
+    static allocUnsafeSlow(size: number): Buffer;
+  }
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/safe-buffer/index.js b/mqtt-backend/node_modules/safe-buffer/index.js
new file mode 100644
index 0000000..f8d3ec9
--- /dev/null
+++ b/mqtt-backend/node_modules/safe-buffer/index.js
@@ -0,0 +1,65 @@
+/*! safe-buffer. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */
+/* eslint-disable node/no-deprecated-api */
+var buffer = require('buffer')
+var Buffer = buffer.Buffer
+
+// alternative to using Object.keys for old browsers
+function copyProps (src, dst) {
+  for (var key in src) {
+    dst[key] = src[key]
+  }
+}
+if (Buffer.from && Buffer.alloc && Buffer.allocUnsafe && Buffer.allocUnsafeSlow) {
+  module.exports = buffer
+} else {
+  // Copy properties from require('buffer')
+  copyProps(buffer, exports)
+  exports.Buffer = SafeBuffer
+}
+
+function SafeBuffer (arg, encodingOrOffset, length) {
+  return Buffer(arg, encodingOrOffset, length)
+}
+
+SafeBuffer.prototype = Object.create(Buffer.prototype)
+
+// Copy static methods from Buffer
+copyProps(Buffer, SafeBuffer)
+
+SafeBuffer.from = function (arg, encodingOrOffset, length) {
+  if (typeof arg === 'number') {
+    throw new TypeError('Argument must not be a number')
+  }
+  return Buffer(arg, encodingOrOffset, length)
+}
+
+SafeBuffer.alloc = function (size, fill, encoding) {
+  if (typeof size !== 'number') {
+    throw new TypeError('Argument must be a number')
+  }
+  var buf = Buffer(size)
+  if (fill !== undefined) {
+    if (typeof encoding === 'string') {
+      buf.fill(fill, encoding)
+    } else {
+      buf.fill(fill)
+    }
+  } else {
+    buf.fill(0)
+  }
+  return buf
+}
+
+SafeBuffer.allocUnsafe = function (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('Argument must be a number')
+  }
+  return Buffer(size)
+}
+
+SafeBuffer.allocUnsafeSlow = function (size) {
+  if (typeof size !== 'number') {
+    throw new TypeError('Argument must be a number')
+  }
+  return buffer.SlowBuffer(size)
+}
diff --git a/mqtt-backend/node_modules/safe-buffer/package.json b/mqtt-backend/node_modules/safe-buffer/package.json
new file mode 100644
index 0000000..f2869e2
--- /dev/null
+++ b/mqtt-backend/node_modules/safe-buffer/package.json
@@ -0,0 +1,51 @@
+{
+  "name": "safe-buffer",
+  "description": "Safer Node.js Buffer API",
+  "version": "5.2.1",
+  "author": {
+    "name": "Feross Aboukhadijeh",
+    "email": "feross@feross.org",
+    "url": "https://feross.org"
+  },
+  "bugs": {
+    "url": "https://github.com/feross/safe-buffer/issues"
+  },
+  "devDependencies": {
+    "standard": "*",
+    "tape": "^5.0.0"
+  },
+  "homepage": "https://github.com/feross/safe-buffer",
+  "keywords": [
+    "buffer",
+    "buffer allocate",
+    "node security",
+    "safe",
+    "safe-buffer",
+    "security",
+    "uninitialized"
+  ],
+  "license": "MIT",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/feross/safe-buffer.git"
+  },
+  "scripts": {
+    "test": "standard && tape test/*.js"
+  },
+  "funding": [
+    {
+      "type": "github",
+      "url": "https://github.com/sponsors/feross"
+    },
+    {
+      "type": "patreon",
+      "url": "https://www.patreon.com/feross"
+    },
+    {
+      "type": "consulting",
+      "url": "https://feross.org/support"
+    }
+  ]
+}
diff --git a/mqtt-backend/node_modules/smart-buffer/.prettierrc.yaml b/mqtt-backend/node_modules/smart-buffer/.prettierrc.yaml
new file mode 100644
index 0000000..9a4f5ed
--- /dev/null
+++ b/mqtt-backend/node_modules/smart-buffer/.prettierrc.yaml
@@ -0,0 +1,5 @@
+parser: typescript
+printWidth: 120
+tabWidth: 2
+singleQuote: true
+trailingComma: none
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/smart-buffer/.travis.yml b/mqtt-backend/node_modules/smart-buffer/.travis.yml
new file mode 100644
index 0000000..eec71ce
--- /dev/null
+++ b/mqtt-backend/node_modules/smart-buffer/.travis.yml
@@ -0,0 +1,13 @@
+language: node_js
+node_js:
+  - 6
+  - 8
+  - 10
+  - 12
+  - stable
+
+before_script:
+  - npm install -g typescript
+  - tsc -p ./
+
+script: "npm run coveralls"
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/smart-buffer/LICENSE b/mqtt-backend/node_modules/smart-buffer/LICENSE
new file mode 100644
index 0000000..aab5771
--- /dev/null
+++ b/mqtt-backend/node_modules/smart-buffer/LICENSE
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013-2017 Josh Glazebrook
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/smart-buffer/README.md b/mqtt-backend/node_modules/smart-buffer/README.md
new file mode 100644
index 0000000..6e49828
--- /dev/null
+++ b/mqtt-backend/node_modules/smart-buffer/README.md
@@ -0,0 +1,633 @@
+smart-buffer  [![Build Status](https://travis-ci.org/JoshGlazebrook/smart-buffer.svg?branch=master)](https://travis-ci.org/JoshGlazebrook/smart-buffer)  [![Coverage Status](https://coveralls.io/repos/github/JoshGlazebrook/smart-buffer/badge.svg?branch=master)](https://coveralls.io/github/JoshGlazebrook/smart-buffer?branch=master)
+=============
+
+smart-buffer is a Buffer wrapper that adds automatic read & write offset tracking, string operations, data insertions, and more.
+
+![stats](https://nodei.co/npm/smart-buffer.png?downloads=true&downloadRank=true&stars=true "stats")
+
+**Key Features**:
+* Proxies all of the Buffer write and read functions
+* Keeps track of read and write offsets automatically
+* Grows the internal Buffer as needed
+* Useful string operations. (Null terminating strings)
+* Allows for inserting values at specific points in the Buffer
+* Built in TypeScript
+* Type Definitions Provided
+* Browser Support (using Webpack/Browserify)
+* Full test coverage
+
+**Requirements**:
+* Node v4.0+ is supported at this time.  (Versions prior to 2.0 will work on node 0.10)
+
+
+
+## Breaking Changes in v4.0
+
+* Old constructor patterns have been completely removed. It's now required to use the SmartBuffer.fromXXX() factory constructors.
+* rewind(), skip(), moveTo() have been removed. (see [offsets](#offsets))
+* Internal private properties are now prefixed with underscores (_)
+* **All** writeXXX() methods that are given an offset will now **overwrite data** instead of insert. (see [write vs insert](#write-vs-insert))
+* insertXXX() methods have been added for when you want to insert data at a specific offset (this replaces the old behavior of writeXXX() when an offset was provided)
+
+
+## Looking for v3 docs?
+
+Legacy documentation for version 3 and prior can be found [here](https://github.com/JoshGlazebrook/smart-buffer/blob/master/docs/README_v3.md).
+
+## Installing:
+
+`yarn add smart-buffer`
+
+or
+
+`npm install smart-buffer`
+
+Note: The published NPM package includes the built javascript library.
+If you cloned this repo and wish to build the library manually use:
+
+`npm run build`
+
+## Using smart-buffer
+
+```javascript
+// Javascript
+const SmartBuffer = require('smart-buffer').SmartBuffer;
+
+// Typescript
+import { SmartBuffer, SmartBufferOptions} from 'smart-buffer';
+```
+
+### Simple Example
+
+Building a packet that uses the following protocol specification:
+
+`[PacketType:2][PacketLength:2][Data:XX]`
+
+To build this packet using the vanilla Buffer class, you would have to count up the length of the data payload beforehand. You would also need to keep track of the current "cursor" position in your Buffer so you write everything in the right places. With smart-buffer you don't have to do either of those things.
+
+```javascript
+function createLoginPacket(username, password, age, country) {
+    const packet = new SmartBuffer();
+    packet.writeUInt16LE(0x0060); // Some packet type
+    packet.writeStringNT(username);
+    packet.writeStringNT(password);
+    packet.writeUInt8(age);
+    packet.writeStringNT(country);
+    packet.insertUInt16LE(packet.length - 2, 2);
+
+    return packet.toBuffer();
+}
+```
+With the above function, you now can do this:
+```javascript
+const login = createLoginPacket("Josh", "secret123", 22, "United States");
+
+// <Buffer 60 00 1e 00 4a 6f 73 68 00 73 65 63 72 65 74 31 32 33 00 16 55 6e 69 74 65 64 20 53 74 61 74 65 73 00>
+```
+Notice that the `[PacketLength:2]` value (1e 00) was inserted at position 2.
+
+Reading back the packet we created above is just as easy:
+```javascript
+
+const reader = SmartBuffer.fromBuffer(login);
+
+const logininfo = {
+    packetType: reader.readUInt16LE(),
+    packetLength: reader.readUInt16LE(),
+    username: reader.readStringNT(),
+    password: reader.readStringNT(),
+    age: reader.readUInt8(),
+    country: reader.readStringNT()
+};
+
+/*
+{
+    packetType: 96, (0x0060)
+    packetLength: 30,
+    username: 'Josh',
+    password: 'secret123',
+    age: 22,
+    country: 'United States'
+}
+*/
+```
+
+
+## Write vs Insert
+In prior versions of SmartBuffer, .writeXXX(value, offset) calls would insert data when an offset was provided. In version 4, this will now overwrite the data at the offset position. To insert data there are now corresponding .insertXXX(value, offset) methods.
+
+**SmartBuffer v3**:
+```javascript
+const buff = SmartBuffer.fromBuffer(new Buffer([1,2,3,4,5,6]));
+buff.writeInt8(7, 2);
+console.log(buff.toBuffer())
+
+// <Buffer 01 02 07 03 04 05 06>
+```
+
+**SmartBuffer v4**:
+```javascript
+const buff = SmartBuffer.fromBuffer(new Buffer([1,2,3,4,5,6]));
+buff.writeInt8(7, 2);
+console.log(buff.toBuffer());
+
+// <Buffer 01 02 07 04 05 06>
+```
+
+To insert you instead should use:
+```javascript
+const buff = SmartBuffer.fromBuffer(new Buffer([1,2,3,4,5,6]));
+buff.insertInt8(7, 2);
+console.log(buff.toBuffer());
+
+// <Buffer 01 02 07 03 04 05 06>
+```
+
+**Note:** Insert/Writing to a position beyond the currently tracked internal Buffer will zero pad to your offset.
+
+## Constructing a smart-buffer
+
+There are a few different ways to construct a SmartBuffer instance.
+
+```javascript
+// Creating SmartBuffer from existing Buffer
+const buff = SmartBuffer.fromBuffer(buffer); // Creates instance from buffer. (Uses default utf8 encoding)
+const buff = SmartBuffer.fromBuffer(buffer, 'ascii'); // Creates instance from buffer with ascii encoding for strings.
+
+// Creating SmartBuffer with specified internal Buffer size. (Note: this is not a hard cap, the internal buffer will grow as needed).
+const buff = SmartBuffer.fromSize(1024); // Creates instance with internal Buffer size of 1024.
+const buff = SmartBuffer.fromSize(1024, 'utf8'); // Creates instance with internal Buffer size of 1024, and utf8 encoding for strings.
+
+// Creating SmartBuffer with options object. This one specifies size and encoding.
+const buff = SmartBuffer.fromOptions({
+    size: 1024,
+    encoding: 'ascii'
+});
+
+// Creating SmartBuffer with options object. This one specified an existing Buffer.
+const buff = SmartBuffer.fromOptions({
+    buff: buffer
+});
+
+// Creating SmartBuffer from a string.
+const buff = SmartBuffer.fromBuffer(Buffer.from('some string', 'utf8'));
+
+// Just want a regular SmartBuffer with all default options?
+const buff = new SmartBuffer();
+```
+
+# Api Reference:
+
+**Note:** SmartBuffer is fully documented with Typescript definitions as well as jsdocs so your favorite editor/IDE will have intellisense.
+
+**Table of Contents**
+
+1. [Constructing](#constructing)
+2. **Numbers**
+    1. [Integers](#integers)
+    2. [Floating Points](#floating-point-numbers)
+3. **Strings**
+    1. [Strings](#strings)
+    2. [Null Terminated Strings](#null-terminated-strings)
+4. [Buffers](#buffers)
+5. [Offsets](#offsets)
+6. [Other](#other)
+
+
+## Constructing
+
+### constructor()
+### constructor([options])
+- ```options``` *{SmartBufferOptions}* An optional options object to construct a SmartBuffer with.
+
+Examples:
+```javascript
+const buff = new SmartBuffer();
+const buff = new SmartBuffer({
+    size: 1024,
+    encoding: 'ascii'
+});
+```
+
+### Class Method: fromBuffer(buffer[, encoding])
+- ```buffer``` *{Buffer}* The Buffer instance to wrap.
+- ```encoding``` *{string}* The string encoding to use. ```Default: 'utf8'```
+
+Examples:
+```javascript
+const someBuffer = Buffer.from('some string');
+const buff = SmartBuffer.fromBuffer(someBuffer); // Defaults to utf8
+const buff = SmartBuffer.fromBuffer(someBuffer, 'ascii');
+```
+
+### Class Method: fromSize(size[, encoding])
+- ```size``` *{number}* The size to initialize the internal Buffer.
+- ```encoding``` *{string}* The string encoding to use. ```Default: 'utf8'```
+
+Examples:
+```javascript
+const buff = SmartBuffer.fromSize(1024); // Defaults to utf8
+const buff = SmartBuffer.fromSize(1024, 'ascii');
+```
+
+### Class Method: fromOptions(options)
+- ```options``` *{SmartBufferOptions}* The Buffer instance to wrap.
+
+```typescript
+interface SmartBufferOptions {
+    encoding?: BufferEncoding; // Defaults to utf8
+    size?: number; // Defaults to 4096
+    buff?: Buffer;
+}
+```
+
+Examples:
+```javascript
+const buff = SmartBuffer.fromOptions({
+    size: 1024
+};
+const buff = SmartBuffer.fromOptions({
+    size: 1024,
+    encoding: 'utf8'
+});
+const buff = SmartBuffer.fromOptions({
+    encoding: 'utf8'
+});
+
+const someBuff = Buffer.from('some string', 'utf8');
+const buff = SmartBuffer.fromOptions({
+    buffer: someBuff,
+    encoding: 'utf8'
+});
+```
+
+## Integers
+
+### buff.readInt8([offset])
+### buff.readUInt8([offset])
+- ```offset``` *{number}* Optional position to start reading data from. **Default**: ```Auto managed offset```
+- Returns *{number}*
+
+Read a Int8 value.
+
+### buff.readInt16BE([offset])
+### buff.readInt16LE([offset])
+### buff.readUInt16BE([offset])
+### buff.readUInt16LE([offset])
+- ```offset``` *{number}* Optional position to start reading data from. **Default**: ```Auto managed offset```
+- Returns *{number}*
+
+Read a 16 bit integer value.
+
+### buff.readInt32BE([offset])
+### buff.readInt32LE([offset])
+### buff.readUInt32BE([offset])
+### buff.readUInt32LE([offset])
+- ```offset``` *{number}* Optional position to start reading data from. **Default**: ```Auto managed offset```
+- Returns *{number}*
+
+Read a 32 bit integer value.
+
+
+### buff.writeInt8(value[, offset])
+### buff.writeUInt8(value[, offset])
+- ```value``` *{number}* The value to write.
+- ```offset``` *{number}* An optional offset to write this value to. **Default:** ```Auto managed offset```
+- Returns *{this}*
+
+Write a Int8 value.
+
+### buff.insertInt8(value, offset)
+### buff.insertUInt8(value, offset)
+- ```value``` *{number}* The value to insert.
+- ```offset``` *{number}* The offset to insert this data at.
+- Returns *{this}*
+
+Insert a Int8 value.
+
+
+### buff.writeInt16BE(value[, offset])
+### buff.writeInt16LE(value[, offset])
+### buff.writeUInt16BE(value[, offset])
+### buff.writeUInt16LE(value[, offset])
+- ```value``` *{number}* The value to write.
+- ```offset``` *{number}* An optional offset to write this value to. **Default:** ```Auto managed offset```
+- Returns *{this}*
+
+Write a 16 bit integer value.
+
+### buff.insertInt16BE(value, offset)
+### buff.insertInt16LE(value, offset)
+### buff.insertUInt16BE(value, offset)
+### buff.insertUInt16LE(value, offset)
+- ```value``` *{number}* The value to insert.
+- ```offset``` *{number}* The offset to insert this data at.
+- Returns *{this}*
+
+Insert a 16 bit integer value.
+
+
+### buff.writeInt32BE(value[, offset])
+### buff.writeInt32LE(value[, offset])
+### buff.writeUInt32BE(value[, offset])
+### buff.writeUInt32LE(value[, offset])
+- ```value``` *{number}* The value to write.
+- ```offset``` *{number}* An optional offset to write this value to. **Default:** ```Auto managed offset```
+- Returns *{this}*
+
+Write a 32 bit integer value.
+
+### buff.insertInt32BE(value, offset)
+### buff.insertInt32LE(value, offset)
+### buff.insertUInt32BE(value, offset)
+### buff.nsertUInt32LE(value, offset)
+- ```value``` *{number}* The value to insert.
+- ```offset``` *{number}* The offset to insert this data at.
+- Returns *{this}*
+
+Insert a 32 bit integer value.
+
+
+## Floating Point Numbers
+
+### buff.readFloatBE([offset])
+### buff.readFloatLE([offset])
+- ```offset``` *{number}* Optional position to start reading data from. **Default**: ```Auto managed offset```
+- Returns *{number}*
+
+Read a Float value.
+
+### buff.readDoubleBE([offset])
+### buff.readDoubleLE([offset])
+- ```offset``` *{number}* Optional position to start reading data from. **Default**: ```Auto managed offset```
+- Returns *{number}*
+
+Read a Double value.
+
+
+### buff.writeFloatBE(value[, offset])
+### buff.writeFloatLE(value[, offset])
+- ```value``` *{number}* The value to write.
+- ```offset``` *{number}* An optional offset to write this value to. **Default:** ```Auto managed offset```
+- Returns *{this}*
+
+Write a Float value.
+
+### buff.insertFloatBE(value, offset)
+### buff.insertFloatLE(value, offset)
+- ```value``` *{number}* The value to insert.
+- ```offset``` *{number}* The offset to insert this data at.
+- Returns *{this}*
+
+Insert a Float value.
+
+
+### buff.writeDoubleBE(value[, offset])
+### buff.writeDoubleLE(value[, offset])
+- ```value``` *{number}* The value to write.
+- ```offset``` *{number}* An optional offset to write this value to. **Default:** ```Auto managed offset```
+- Returns *{this}*
+
+Write a Double value.
+
+### buff.insertDoubleBE(value, offset)
+### buff.insertDoubleLE(value, offset)
+- ```value``` *{number}* The value to insert.
+- ```offset``` *{number}* The offset to insert this data at.
+- Returns *{this}*
+
+Insert a Double value.
+
+## Strings
+
+### buff.readString()
+### buff.readString(size[, encoding])
+### buff.readString(encoding)
+- ```size``` *{number}* The number of bytes to read. **Default:** ```Reads to the end of the Buffer.```
+- ```encoding``` *{string}* The string encoding to use. **Default:** ```utf8```.
+
+Read a string value.
+
+Examples:
+```javascript
+const buff = SmartBuffer.fromBuffer(Buffer.from('hello there', 'utf8'));
+buff.readString(); // 'hello there'
+buff.readString(2); // 'he'
+buff.readString(2, 'utf8'); // 'he'
+buff.readString('utf8'); // 'hello there'
+```
+
+### buff.writeString(value)
+### buff.writeString(value[, offset])
+### buff.writeString(value[, encoding])
+### buff.writeString(value[, offset[, encoding]])
+- ```value``` *{string}* The string value to write.
+- ```offset``` *{number}* The offset to write this value to. **Default:** ```Auto managed offset```
+- ```encoding``` *{string}* An optional string encoding to use. **Default:** ```utf8```
+
+Write a string value.
+
+Examples:
+```javascript
+buff.writeString('hello'); // Auto managed offset
+buff.writeString('hello', 2);
+buff.writeString('hello', 'utf8') // Auto managed offset
+buff.writeString('hello', 2, 'utf8');
+```
+
+### buff.insertString(value, offset[, encoding])
+- ```value``` *{string}* The string value to write.
+- ```offset``` *{number}* The offset to write this value to.
+- ```encoding``` *{string}* An optional string encoding to use. **Default:** ```utf8```
+
+Insert a string value.
+
+Examples:
+```javascript
+buff.insertString('hello', 2);
+buff.insertString('hello', 2, 'utf8');
+```
+
+## Null Terminated Strings
+
+### buff.readStringNT()
+### buff.readStringNT(encoding)
+- ```encoding``` *{string}* The string encoding to use. **Default:** ```utf8```.
+
+Read a null terminated string value. (If a null is not found, it will read to the end of the Buffer).
+
+Examples:
+```javascript
+const buff = SmartBuffer.fromBuffer(Buffer.from('hello\0 there', 'utf8'));
+buff.readStringNT(); // 'hello'
+
+// If we called this again:
+buff.readStringNT(); // ' there'
+```
+
+### buff.writeStringNT(value)
+### buff.writeStringNT(value[, offset])
+### buff.writeStringNT(value[, encoding])
+### buff.writeStringNT(value[, offset[, encoding]])
+- ```value``` *{string}* The string value to write.
+- ```offset``` *{number}* The offset to write this value to. **Default:** ```Auto managed offset```
+- ```encoding``` *{string}* An optional string encoding to use. **Default:** ```utf8```
+
+Write a null terminated string value.
+
+Examples:
+```javascript
+buff.writeStringNT('hello'); // Auto managed offset   <Buffer 68 65 6c 6c 6f 00>
+buff.writeStringNT('hello', 2); // <Buffer 00 00 68 65 6c 6c 6f 00>
+buff.writeStringNT('hello', 'utf8') // Auto managed offset
+buff.writeStringNT('hello', 2, 'utf8');
+```
+
+### buff.insertStringNT(value, offset[, encoding])
+- ```value``` *{string}* The string value to write.
+- ```offset``` *{number}* The offset to write this value to.
+- ```encoding``` *{string}* An optional string encoding to use. **Default:** ```utf8```
+
+Insert a null terminated string value.
+
+Examples:
+```javascript
+buff.insertStringNT('hello', 2);
+buff.insertStringNT('hello', 2, 'utf8');
+```
+
+## Buffers
+
+### buff.readBuffer([length])
+- ```length``` *{number}* The number of bytes to read into a Buffer. **Default:** ```Reads to the end of the Buffer```
+
+Read a Buffer of a specified size.
+
+### buff.writeBuffer(value[, offset])
+- ```value``` *{Buffer}* The buffer value to write.
+- ```offset``` *{number}* An optional offset to write the value to. **Default:** ```Auto managed offset```
+
+### buff.insertBuffer(value, offset)
+- ```value``` *{Buffer}* The buffer value to write.
+- ```offset``` *{number}* The offset to write the value to.
+
+
+### buff.readBufferNT()
+
+Read a null terminated Buffer.
+
+### buff.writeBufferNT(value[, offset])
+- ```value``` *{Buffer}* The buffer value to write.
+- ```offset``` *{number}* An optional offset to write the value to. **Default:** ```Auto managed offset```
+
+Write a null terminated Buffer.
+
+
+### buff.insertBufferNT(value, offset)
+- ```value``` *{Buffer}* The buffer value to write.
+- ```offset``` *{number}* The offset to write the value to.
+
+Insert a null terminated Buffer.
+
+
+## Offsets
+
+### buff.readOffset
+### buff.readOffset(offset)
+- ```offset``` *{number}* The new read offset value to set.
+- Returns: ```The current read offset```
+
+Gets or sets the current read offset.
+
+Examples:
+```javascript
+const currentOffset = buff.readOffset; // 5
+
+buff.readOffset = 10;
+
+console.log(buff.readOffset) // 10
+```
+
+### buff.writeOffset
+### buff.writeOffset(offset)
+- ```offset``` *{number}* The new write offset value to set.
+- Returns: ```The current write offset```
+
+Gets or sets the current write offset.
+
+Examples:
+```javascript
+const currentOffset = buff.writeOffset; // 5
+
+buff.writeOffset = 10;
+
+console.log(buff.writeOffset) // 10
+```
+
+### buff.encoding
+### buff.encoding(encoding)
+- ```encoding``` *{string}* The new string encoding to set.
+- Returns: ```The current string encoding```
+
+Gets or sets the current string encoding.
+
+Examples:
+```javascript
+const currentEncoding = buff.encoding; // 'utf8'
+
+buff.encoding = 'ascii';
+
+console.log(buff.encoding) // 'ascii'
+```
+
+## Other
+
+### buff.clear()
+
+Clear and resets the SmartBuffer instance.
+
+### buff.remaining()
+- Returns ```Remaining data left to be read```
+
+Gets the number of remaining bytes to be read.
+
+
+### buff.internalBuffer
+- Returns: *{Buffer}*
+
+Gets the internally managed Buffer (Includes unmanaged data).
+
+Examples:
+```javascript
+const buff = SmartBuffer.fromSize(16);
+buff.writeString('hello');
+console.log(buff.InternalBuffer); // <Buffer 68 65 6c 6c 6f 00 00 00 00 00 00 00 00 00 00 00>
+```
+
+### buff.toBuffer()
+- Returns: *{Buffer}*
+
+Gets a sliced Buffer instance of the internally managed Buffer. (Only includes managed data)
+
+Examples:
+```javascript
+const buff = SmartBuffer.fromSize(16);
+buff.writeString('hello');
+console.log(buff.toBuffer()); // <Buffer 68 65 6c 6c 6f>
+```
+
+### buff.toString([encoding])
+- ```encoding``` *{string}* The string encoding to use when converting to a string. **Default:** ```utf8```
+- Returns *{string}*
+
+Gets a string representation of all data in the SmartBuffer.
+
+### buff.destroy()
+
+Destroys the SmartBuffer instance.
+
+
+
+## License
+
+This work is licensed under the [MIT license](http://en.wikipedia.org/wiki/MIT_License).
diff --git a/mqtt-backend/node_modules/smart-buffer/docs/CHANGELOG.md b/mqtt-backend/node_modules/smart-buffer/docs/CHANGELOG.md
new file mode 100644
index 0000000..1199a4d
--- /dev/null
+++ b/mqtt-backend/node_modules/smart-buffer/docs/CHANGELOG.md
@@ -0,0 +1,70 @@
+# Change Log
+## 4.1.0
+> Released 07/24/2019
+* Adds int64 support for node v12+
+* Drops support for node v4
+
+## 4.0
+> Released 10/21/2017
+* Major breaking changes arriving in v4.
+
+### New Features
+* Ability to read data from a specific offset. ex: readInt8(5)
+* Ability to write over data when an offset is given (see breaking changes) ex:  writeInt8(5, 0);
+* Ability to set internal read and write offsets.
+
+
+
+### Breaking Changes
+
+* Old constructor patterns have been completely removed. It's now required to use the SmartBuffer.fromXXX() factory constructors. Read more on the v4 docs.
+* rewind(), skip(), moveTo() have been removed.
+* Internal private properties are now prefixed with underscores (_).
+* **All** writeXXX() methods that are given an offset will now **overwrite data** instead of insert
+* insertXXX() methods have been added for when you want to insert data at a specific offset (this replaces the old behavior of writeXXX() when an offset was provided)
+
+
+### Other Changes
+* Standardizd error messaging
+* Standardized offset/length bounds and sanity checking
+* General overall cleanup of code.
+
+## 3.0.3
+> Released 02/19/2017
+* Adds missing type definitions for some internal functions.
+
+## 3.0.2
+> Released 02/17/2017
+
+### Bug Fixes
+* Fixes a bug where using readString with a length of zero resulted in reading the remaining data instead of returning an empty string. (Fixed by Seldszar)
+
+## 3.0.1
+> Released 02/15/2017
+
+### Bug Fixes
+* Fixes a bug leftover from the TypeScript refactor where .readIntXXX() resulted in .readUIntXXX() being called by mistake.
+
+## 3.0
+> Released 02/12/2017
+
+### Bug Fixes
+* readUIntXXXX() methods will now throw an exception if they attempt to read beyond the bounds of the valid buffer data available.
+    * **Note** This is technically a breaking change, so version is bumped to 3.x.
+
+## 2.0
+> Relased 01/30/2017
+
+### New Features:
+
+* Entire package re-written in TypeScript (2.1)
+* Backwards compatibility is preserved for now
+* New factory methods for creating SmartBuffer instances
+    * SmartBuffer.fromSize()
+    * SmartBuffer.fromBuffer()
+    * SmartBuffer.fromOptions()
+* New SmartBufferOptions constructor options
+* Added additional tests
+
+### Bug Fixes:
+* Fixes a bug where reading null terminated strings may result in an exception.
diff --git a/mqtt-backend/node_modules/smart-buffer/docs/README_v3.md b/mqtt-backend/node_modules/smart-buffer/docs/README_v3.md
new file mode 100644
index 0000000..b7c48b8
--- /dev/null
+++ b/mqtt-backend/node_modules/smart-buffer/docs/README_v3.md
@@ -0,0 +1,367 @@
+smart-buffer  [![Build Status](https://travis-ci.org/JoshGlazebrook/smart-buffer.svg?branch=master)](https://travis-ci.org/JoshGlazebrook/smart-buffer)  [![Coverage Status](https://coveralls.io/repos/github/JoshGlazebrook/smart-buffer/badge.svg?branch=master)](https://coveralls.io/github/JoshGlazebrook/smart-buffer?branch=master)
+=============
+
+smart-buffer is a light Buffer wrapper that takes away the need to keep track of what position to read and write data to and from the underlying Buffer. It also adds null terminating string operations and **grows** as you add more data.
+
+![stats](https://nodei.co/npm/smart-buffer.png?downloads=true&downloadRank=true&stars=true "stats")
+
+### What it's useful for:
+
+I created smart-buffer because I wanted to simplify the process of using Buffer for building and reading network packets to send over a socket. Rather than having to keep track of which position I need to write a UInt16 to after adding a string of variable length, I simply don't have to.
+
+Key Features:
+* Proxies all of the Buffer write and read functions.
+* Keeps track of read and write positions for you.
+* Grows the internal Buffer as you add data to it. 
+* Useful string operations. (Null terminating strings)
+* Allows for inserting values at specific points in the internal Buffer.
+* Built in TypeScript
+* Type Definitions Provided
+
+Requirements:
+* Node v4.0+ is supported at this time.  (Versions prior to 2.0 will work on node 0.10)
+
+
+#### Note:
+smart-buffer can be used for writing to an underlying buffer as well as reading from it. It however does not function correctly if you're mixing both read and write operations with each other.
+
+## Breaking Changes with 2.0
+The latest version (2.0+) is written in TypeScript, and are compiled to ES6 Javascript. This means the earliest Node.js it supports will be 4.x (in strict mode.) If you're using version 6 and above it will work without any issues. From an API standpoint, 2.0 is backwards compatible. The only difference is SmartBuffer is not exported directly as the root module.
+
+## Breaking Changes with 3.0
+Starting with 3.0, if any of the readIntXXXX() methods are called and the requested data is larger than the bounds of the internally managed valid buffer data, an exception will now be thrown.
+
+## Installing:
+
+`npm install smart-buffer`
+
+or
+
+`yarn add smart-buffer`
+
+Note: The published NPM package includes the built javascript library. 
+If you cloned this repo and wish to build the library manually use:
+
+`tsc -p ./`
+
+## Using smart-buffer
+
+### Example
+
+Say you were building a packet that had to conform to the following protocol:
+
+`[PacketType:2][PacketLength:2][Data:XX]`
+
+To build this packet using the vanilla Buffer class, you would have to count up the length of the data payload beforehand. You would also need to keep track of the current "cursor" position in your Buffer so you write everything in the right places. With smart-buffer you don't have to do either of those things.
+
+```javascript
+// 1.x (javascript)
+var SmartBuffer = require('smart-buffer');
+
+// 1.x (typescript)
+import SmartBuffer = require('smart-buffer');
+
+// 2.x+ (javascript)
+const SmartBuffer = require('smart-buffer').SmartBuffer;
+
+// 2.x+ (typescript)
+import { SmartBuffer, SmartBufferOptions} from 'smart-buffer';
+
+function createLoginPacket(username, password, age, country) {
+    let packet = new SmartBuffer();
+    packet.writeUInt16LE(0x0060); // Login Packet Type/ID
+    packet.writeStringNT(username);
+    packet.writeStringNT(password);
+    packet.writeUInt8(age);
+    packet.writeStringNT(country);
+    packet.writeUInt16LE(packet.length - 2, 2);
+    
+    return packet.toBuffer();
+}
+```
+With the above function, you now can do this:
+```javascript
+let login = createLoginPacket("Josh", "secret123", 22, "United States");
+
+// <Buffer 60 00 1e 00 4a 6f 73 68 00 73 65 63 72 65 74 31 32 33 00 16 55 6e 69 74 65 64 20 53 74 61 74 65 73 00>
+```
+Notice that the `[PacketLength:2]` part of the packet was inserted after we had added everything else, and as shown in the Buffer dump above, is in the correct location along with everything else.
+
+Reading back the packet we created above is just as easy:
+```javascript
+
+let reader = SmartBuffer.fromBuffer(login);
+
+let logininfo = {
+    packetType: reader.readUInt16LE(),
+    packetLength: reader.readUInt16LE(),
+    username: reader.readStringNT(),
+    password: reader.readStringNT(),
+    age: reader.readUInt8(),
+    country: reader.readStringNT()
+};
+
+/*
+{ 
+    packetType: 96, (0x0060)
+    packetLength: 30,
+    username: 'Josh',
+    password: 'secret123',
+    age: 22,
+    country: 'United States' 
+};
+*/
+```
+
+# Api Reference:
+
+### Constructing a smart-buffer
+
+smart-buffer has a few different ways to construct an instance. Starting with version 2.0, the following factory methods are preffered.
+
+```javascript
+let SmartBuffer = require('smart-buffer');
+
+// Creating SmartBuffer from existing Buffer
+let buff = SmartBuffer.fromBuffer(buffer); // Creates instance from buffer. (Uses default utf8 encoding)
+let buff = SmartBuffer.fromBuffer(buffer, 'ascii'); // Creates instance from buffer with ascii encoding for Strings. 
+
+// Creating SmartBuffer with specified internal Buffer size.
+let buff = SmartBuffer.fromSize(1024); // Creates instance with internal Buffer size of 1024.
+let buff = SmartBuffer.fromSize(1024, 'utf8'); // Creates instance with intenral Buffer size of 1024, and utf8 encoding. 
+
+// Creating SmartBuffer with options object. This one specifies size and encoding.
+let buff = SmartBuffer.fromOptions({
+    size: 1024,
+    encoding: 'ascii'
+});
+
+// Creating SmartBuffer with options object. This one specified an existing Buffer.
+let buff = SmartBuffer.fromOptions({
+    buff: buffer
+});
+
+// Just want a regular SmartBuffer with all default options?
+let buff = new SmartBuffer();
+```
+
+## Backwards Compatibility:
+
+All constructors used prior to 2.0 still are supported. However it's not recommended to use these.
+
+```javascript
+let writer = new SmartBuffer();               // Defaults to utf8, 4096 length internal Buffer.
+let writer = new SmartBuffer(1024);           // Defaults to utf8, 1024 length internal Buffer.
+let writer = new SmartBuffer('ascii');         // Sets to ascii encoding, 4096 length internal buffer.
+let writer = new SmartBuffer(1024, 'ascii');  // Sets to ascii encoding, 1024 length internal buffer.
+```
+
+## Reading Data
+
+smart-buffer supports all of the common read functions you will find in the vanilla Buffer class. The only difference is, you do not need to specify which location to start reading from. This is possible because as you read data out of a smart-buffer, it automatically progresses an internal read offset/position to know where to pick up from on the next read.
+
+## Reading Numeric Values
+
+When numeric values, you simply need to call the function you want, and the data is returned.
+
+Supported Operations:
+* readInt8
+* readInt16BE
+* readInt16LE
+* readInt32BE
+* readInt32LE
+* readBigInt64LE
+* readBigInt64BE
+* readUInt8
+* readUInt16BE
+* readUInt16LE
+* readUInt32BE
+* readUInt32LE
+* readBigUInt64LE
+* readBigUInt64BE
+* readFloatBE
+* readFloatLE
+* readDoubleBE
+* readDoubleLE
+
+```javascript
+let reader = new SmartBuffer(somebuffer);
+let num = reader.readInt8();
+```
+
+## Reading String Values
+
+When reading String values, you can either choose to read a null terminated string, or a string of a specified length.
+
+### SmartBuffer.readStringNT( [encoding] )
+> `String` **String encoding to use**  - Defaults to the encoding set in the constructor. 
+
+returns `String`
+
+> Note: When readStringNT is called and there is no null character found, smart-buffer will read to the end of the internal Buffer.
+
+### SmartBuffer.readString( [length] )
+### SmartBuffer.readString( [encoding] )
+### SmartBuffer.readString( [length], [encoding] )
+> `Number` **Length of the string to read**
+
+> `String` **String encoding to use** - Defaults to the encoding set in the constructor, or utf8.
+
+returns `String`
+
+> Note: When readString is called without a specified length, smart-buffer will read to the end of the internal Buffer.
+
+
+
+## Reading Buffer Values
+
+### SmartBuffer.readBuffer( length )
+> `Number` **Length of data to read into a Buffer**
+
+returns `Buffer`
+
+> Note: This function uses `slice` to retrieve the Buffer.
+
+
+### SmartBuffer.readBufferNT()
+
+returns `Buffer`
+
+> Note: This reads the next sequence of bytes in the buffer until a null (0x00) value is found. (Null terminated buffer)
+> Note: This function uses `slice` to retrieve the Buffer.
+
+
+## Writing Data
+
+smart-buffer supports all of the common write functions you will find in the vanilla Buffer class. The only difference is, you do not need to specify which location to write to in your Buffer by default. You do however have the option of **inserting** a piece of data into your smart-buffer at a given location. 
+
+
+## Writing Numeric Values
+
+
+For numeric values, you simply need to call the function you want, and the data is written at the end of the internal Buffer's current write position. You can specify a offset/position to **insert** the given value at, but keep in mind this does not override data at the given position. This feature also does not work properly when inserting a value beyond the current internal length of the smart-buffer (length being the .length property of the smart-buffer instance you're writing to)
+
+Supported Operations:
+* writeInt8
+* writeInt16BE
+* writeInt16LE
+* writeInt32BE
+* writeInt32LE
+* writeBigInt64BE
+* writeBigInt64LE
+* writeUInt8
+* writeUInt16BE
+* writeUInt16LE
+* writeUInt32BE
+* writeUInt32LE
+* writeBigUInt64BE
+* writeBigUInt64LE
+* writeFloatBE
+* writeFloatLE
+* writeDoubleBE
+* writeDoubleLE
+
+The following signature is the same for all the above functions:
+
+### SmartBuffer.writeInt8( value, [offset] )
+> `Number` **A valid Int8 number**
+
+> `Number` **The position to insert this value at** 
+
+returns this 
+
+> Note: All write operations return `this` to allow for chaining.
+
+## Writing String Values
+
+When reading String values, you can either choose to write a null terminated string, or a non null terminated string.
+
+### SmartBuffer.writeStringNT( value, [offset], [encoding] )
+### SmartBuffer.writeStringNT( value, [offset] )
+### SmartBuffer.writeStringNT( value, [encoding] )
+> `String` **String value to write**
+
+> `Number` **The position to insert this String at**
+
+> `String` **The String encoding to use.** - Defaults to the encoding set in the constructor, or utf8.
+
+returns this
+
+### SmartBuffer.writeString( value, [offset], [encoding] )
+### SmartBuffer.writeString( value, [offset] )
+### SmartBuffer.writeString( value, [encoding] )
+> `String` **String value to write**
+
+> `Number` **The position to insert this String at**
+
+> `String` **The String encoding to use** - Defaults to the encoding set in the constructor, or utf8.
+
+returns this
+
+
+## Writing Buffer Values
+
+### SmartBuffer.writeBuffer( value, [offset] )
+> `Buffer` **Buffer value to write**
+
+> `Number` **The position to insert this Buffer's content at**
+
+returns this
+
+### SmartBuffer.writeBufferNT( value, [offset] )
+> `Buffer` **Buffer value to write**
+
+> `Number` **The position to insert this Buffer's content at**
+
+returns this
+
+
+## Utility Functions
+
+### SmartBuffer.clear()
+Resets the SmartBuffer to its default state where it can be reused for reading or writing.
+
+### SmartBuffer.remaining()
+
+returns `Number` The amount of data left to read based on the current read Position.
+
+### SmartBuffer.skip( value )
+> `Number` **The amount of bytes to skip ahead**
+
+Skips the read position ahead by the given value.
+
+returns this
+
+### SmartBuffer.rewind( value )
+> `Number` **The amount of bytes to reward backwards**
+
+Rewinds the read position backwards by the given value.
+
+returns this
+
+### SmartBuffer.moveTo( position )
+> `Number` **The point to skip the read position to**
+
+Moves the read position to the given point.
+returns this
+
+### SmartBuffer.toBuffer()
+
+returns `Buffer` A Buffer containing the contents of the internal Buffer.
+
+> Note: This uses the slice function.
+
+### SmartBuffer.toString( [encoding] )
+> `String` **The String encoding to use** - Defaults to the encoding set in the constructor, or utf8.
+
+returns `String` The internal Buffer in String representation.
+
+## Properties
+
+### SmartBuffer.length
+
+returns `Number` **The length of the data that is being tracked in the internal Buffer** - Does NOT return the absolute length of the internal Buffer being written to.
+
+## License
+
+This work is licensed under the [MIT license](http://en.wikipedia.org/wiki/MIT_License).
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/smart-buffer/docs/ROADMAP.md b/mqtt-backend/node_modules/smart-buffer/docs/ROADMAP.md
new file mode 100644
index 0000000..e69de29
diff --git a/mqtt-backend/node_modules/smart-buffer/package.json b/mqtt-backend/node_modules/smart-buffer/package.json
new file mode 100644
index 0000000..2f326f2
--- /dev/null
+++ b/mqtt-backend/node_modules/smart-buffer/package.json
@@ -0,0 +1,79 @@
+{
+  "name": "smart-buffer",
+  "version": "4.2.0",
+  "description": "smart-buffer is a Buffer wrapper that adds automatic read & write offset tracking, string operations, data insertions, and more.",
+  "main": "build/smartbuffer.js",
+  "contributors": ["syvita"],
+  "homepage": "https://github.com/JoshGlazebrook/smart-buffer/",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/JoshGlazebrook/smart-buffer.git"
+  },
+  "bugs": {
+    "url": "https://github.com/JoshGlazebrook/smart-buffer/issues"
+  },
+  "keywords": [
+    "buffer",
+    "smart",
+    "packet",
+    "serialize",
+    "network",
+    "cursor",
+    "simple"
+  ],
+  "engines": {
+    "node": ">= 6.0.0",
+    "npm": ">= 3.0.0"
+  },
+  "author": "Josh Glazebrook",
+  "license": "MIT",
+  "readmeFilename": "README.md",
+  "devDependencies": {
+    "@types/chai": "4.1.7",
+    "@types/mocha": "5.2.7",
+    "@types/node": "^12.0.0",
+    "chai": "4.2.0",
+    "coveralls": "3.0.5",
+    "istanbul": "^0.4.5",
+    "mocha": "6.2.0",
+    "mocha-lcov-reporter": "^1.3.0",
+    "nyc": "14.1.1",
+    "source-map-support": "0.5.12",
+    "ts-node": "8.3.0",
+    "tslint": "5.18.0",
+    "typescript": "^3.2.1"
+  },
+  "typings": "typings/smartbuffer.d.ts",
+  "dependencies": {},
+  "scripts": {
+    "prepublish": "npm install -g typescript && npm run build",
+    "test": "NODE_ENV=test mocha --recursive --require ts-node/register test/**/*.ts",
+    "coverage": "NODE_ENV=test nyc npm test",
+    "coveralls": "NODE_ENV=test nyc npm test && nyc report --reporter=text-lcov | coveralls",
+    "lint": "tslint --type-check --project tsconfig.json 'src/**/*.ts'",
+    "build": "tsc -p ./"
+  },
+  "nyc": {
+    "extension": [
+      ".ts",
+      ".tsx"
+    ],
+    "include": [
+      "src/*.ts",
+      "src/**/*.ts"
+    ],
+    "exclude": [
+      "**.*.d.ts",
+      "node_modules",
+      "typings"
+    ],
+    "require": [
+      "ts-node/register"
+    ],
+    "reporter": [
+      "json",
+      "html"
+    ],
+    "all": true
+  }
+}
diff --git a/mqtt-backend/node_modules/smart-buffer/typings/smartbuffer.d.ts b/mqtt-backend/node_modules/smart-buffer/typings/smartbuffer.d.ts
new file mode 100644
index 0000000..d07379b
--- /dev/null
+++ b/mqtt-backend/node_modules/smart-buffer/typings/smartbuffer.d.ts
@@ -0,0 +1,755 @@
+/// <reference types="node" />
+/**
+ * Object interface for constructing new SmartBuffer instances.
+ */
+interface SmartBufferOptions {
+    encoding?: BufferEncoding;
+    size?: number;
+    buff?: Buffer;
+}
+declare class SmartBuffer {
+    length: number;
+    private _encoding;
+    private _buff;
+    private _writeOffset;
+    private _readOffset;
+    /**
+     * Creates a new SmartBuffer instance.
+     *
+     * @param options { SmartBufferOptions } The SmartBufferOptions to apply to this instance.
+     */
+    constructor(options?: SmartBufferOptions);
+    /**
+     * Creates a new SmartBuffer instance with the provided internal Buffer size and optional encoding.
+     *
+     * @param size { Number } The size of the internal Buffer.
+     * @param encoding { String } The BufferEncoding to use for strings.
+     *
+     * @return { SmartBuffer }
+     */
+    static fromSize(size: number, encoding?: BufferEncoding): SmartBuffer;
+    /**
+     * Creates a new SmartBuffer instance with the provided Buffer and optional encoding.
+     *
+     * @param buffer { Buffer } The Buffer to use as the internal Buffer value.
+     * @param encoding { String } The BufferEncoding to use for strings.
+     *
+     * @return { SmartBuffer }
+     */
+    static fromBuffer(buff: Buffer, encoding?: BufferEncoding): SmartBuffer;
+    /**
+     * Creates a new SmartBuffer instance with the provided SmartBufferOptions options.
+     *
+     * @param options { SmartBufferOptions } The options to use when creating the SmartBuffer instance.
+     */
+    static fromOptions(options: SmartBufferOptions): SmartBuffer;
+    /**
+     * Type checking function that determines if an object is a SmartBufferOptions object.
+     */
+    static isSmartBufferOptions(options: SmartBufferOptions): options is SmartBufferOptions;
+    /**
+     * Reads an Int8 value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readInt8(offset?: number): number;
+    /**
+     * Reads an Int16BE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readInt16BE(offset?: number): number;
+    /**
+     * Reads an Int16LE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readInt16LE(offset?: number): number;
+    /**
+     * Reads an Int32BE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readInt32BE(offset?: number): number;
+    /**
+     * Reads an Int32LE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readInt32LE(offset?: number): number;
+    /**
+     * Reads a BigInt64BE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { BigInt }
+     */
+    readBigInt64BE(offset?: number): bigint;
+    /**
+     * Reads a BigInt64LE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { BigInt }
+     */
+    readBigInt64LE(offset?: number): bigint;
+    /**
+     * Writes an Int8 value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeInt8(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts an Int8 value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertInt8(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes an Int16BE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeInt16BE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts an Int16BE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertInt16BE(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes an Int16LE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeInt16LE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts an Int16LE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertInt16LE(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes an Int32BE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeInt32BE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts an Int32BE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertInt32BE(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes an Int32LE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeInt32LE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts an Int32LE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertInt32LE(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes a BigInt64BE value to the current write position (or at optional offset).
+     *
+     * @param value { BigInt } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeBigInt64BE(value: bigint, offset?: number): SmartBuffer;
+    /**
+     * Inserts a BigInt64BE value at the given offset value.
+     *
+     * @param value { BigInt } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertBigInt64BE(value: bigint, offset: number): SmartBuffer;
+    /**
+     * Writes a BigInt64LE value to the current write position (or at optional offset).
+     *
+     * @param value { BigInt } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeBigInt64LE(value: bigint, offset?: number): SmartBuffer;
+    /**
+     * Inserts a Int64LE value at the given offset value.
+     *
+     * @param value { BigInt } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertBigInt64LE(value: bigint, offset: number): SmartBuffer;
+    /**
+     * Reads an UInt8 value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readUInt8(offset?: number): number;
+    /**
+     * Reads an UInt16BE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readUInt16BE(offset?: number): number;
+    /**
+     * Reads an UInt16LE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readUInt16LE(offset?: number): number;
+    /**
+     * Reads an UInt32BE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readUInt32BE(offset?: number): number;
+    /**
+     * Reads an UInt32LE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readUInt32LE(offset?: number): number;
+    /**
+     * Reads a BigUInt64BE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { BigInt }
+     */
+    readBigUInt64BE(offset?: number): bigint;
+    /**
+     * Reads a BigUInt64LE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { BigInt }
+     */
+    readBigUInt64LE(offset?: number): bigint;
+    /**
+     * Writes an UInt8 value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeUInt8(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts an UInt8 value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertUInt8(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes an UInt16BE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeUInt16BE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts an UInt16BE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertUInt16BE(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes an UInt16LE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeUInt16LE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts an UInt16LE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertUInt16LE(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes an UInt32BE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeUInt32BE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts an UInt32BE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertUInt32BE(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes an UInt32LE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeUInt32LE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts an UInt32LE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertUInt32LE(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes a BigUInt64BE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeBigUInt64BE(value: bigint, offset?: number): SmartBuffer;
+    /**
+     * Inserts a BigUInt64BE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertBigUInt64BE(value: bigint, offset: number): SmartBuffer;
+    /**
+     * Writes a BigUInt64LE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeBigUInt64LE(value: bigint, offset?: number): SmartBuffer;
+    /**
+     * Inserts a BigUInt64LE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertBigUInt64LE(value: bigint, offset: number): SmartBuffer;
+    /**
+     * Reads an FloatBE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readFloatBE(offset?: number): number;
+    /**
+     * Reads an FloatLE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readFloatLE(offset?: number): number;
+    /**
+     * Writes a FloatBE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeFloatBE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts a FloatBE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertFloatBE(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes a FloatLE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeFloatLE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts a FloatLE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertFloatLE(value: number, offset: number): SmartBuffer;
+    /**
+     * Reads an DoublEBE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readDoubleBE(offset?: number): number;
+    /**
+     * Reads an DoubleLE value from the current read position or an optionally provided offset.
+     *
+     * @param offset { Number } The offset to read data from (optional)
+     * @return { Number }
+     */
+    readDoubleLE(offset?: number): number;
+    /**
+     * Writes a DoubleBE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeDoubleBE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts a DoubleBE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertDoubleBE(value: number, offset: number): SmartBuffer;
+    /**
+     * Writes a DoubleLE value to the current write position (or at optional offset).
+     *
+     * @param value { Number } The value to write.
+     * @param offset { Number } The offset to write the value at.
+     *
+     * @return this
+     */
+    writeDoubleLE(value: number, offset?: number): SmartBuffer;
+    /**
+     * Inserts a DoubleLE value at the given offset value.
+     *
+     * @param value { Number } The value to insert.
+     * @param offset { Number } The offset to insert the value at.
+     *
+     * @return this
+     */
+    insertDoubleLE(value: number, offset: number): SmartBuffer;
+    /**
+     * Reads a String from the current read position.
+     *
+     * @param arg1 { Number | String } The number of bytes to read as a String, or the BufferEncoding to use for
+     *             the string (Defaults to instance level encoding).
+     * @param encoding { String } The BufferEncoding to use for the string (Defaults to instance level encoding).
+     *
+     * @return { String }
+     */
+    readString(arg1?: number | BufferEncoding, encoding?: BufferEncoding): string;
+    /**
+     * Inserts a String
+     *
+     * @param value { String } The String value to insert.
+     * @param offset { Number } The offset to insert the string at.
+     * @param encoding { String } The BufferEncoding to use for writing strings (defaults to instance encoding).
+     *
+     * @return this
+     */
+    insertString(value: string, offset: number, encoding?: BufferEncoding): SmartBuffer;
+    /**
+     * Writes a String
+     *
+     * @param value { String } The String value to write.
+     * @param arg2 { Number | String } The offset to write the string at, or the BufferEncoding to use.
+     * @param encoding { String } The BufferEncoding to use for writing strings (defaults to instance encoding).
+     *
+     * @return this
+     */
+    writeString(value: string, arg2?: number | BufferEncoding, encoding?: BufferEncoding): SmartBuffer;
+    /**
+     * Reads a null-terminated String from the current read position.
+     *
+     * @param encoding { String } The BufferEncoding to use for the string (Defaults to instance level encoding).
+     *
+     * @return { String }
+     */
+    readStringNT(encoding?: BufferEncoding): string;
+    /**
+     * Inserts a null-terminated String.
+     *
+     * @param value { String } The String value to write.
+     * @param arg2 { Number | String } The offset to write the string to, or the BufferEncoding to use.
+     * @param encoding { String } The BufferEncoding to use for writing strings (defaults to instance encoding).
+     *
+     * @return this
+     */
+    insertStringNT(value: string, offset: number, encoding?: BufferEncoding): SmartBuffer;
+    /**
+     * Writes a null-terminated String.
+     *
+     * @param value { String } The String value to write.
+     * @param arg2 { Number | String } The offset to write the string to, or the BufferEncoding to use.
+     * @param encoding { String } The BufferEncoding to use for writing strings (defaults to instance encoding).
+     *
+     * @return this
+     */
+    writeStringNT(value: string, arg2?: number | BufferEncoding, encoding?: BufferEncoding): SmartBuffer;
+    /**
+     * Reads a Buffer from the internal read position.
+     *
+     * @param length { Number } The length of data to read as a Buffer.
+     *
+     * @return { Buffer }
+     */
+    readBuffer(length?: number): Buffer;
+    /**
+     * Writes a Buffer to the current write position.
+     *
+     * @param value { Buffer } The Buffer to write.
+     * @param offset { Number } The offset to write the Buffer to.
+     *
+     * @return this
+     */
+    insertBuffer(value: Buffer, offset: number): SmartBuffer;
+    /**
+     * Writes a Buffer to the current write position.
+     *
+     * @param value { Buffer } The Buffer to write.
+     * @param offset { Number } The offset to write the Buffer to.
+     *
+     * @return this
+     */
+    writeBuffer(value: Buffer, offset?: number): SmartBuffer;
+    /**
+     * Reads a null-terminated Buffer from the current read poisiton.
+     *
+     * @return { Buffer }
+     */
+    readBufferNT(): Buffer;
+    /**
+     * Inserts a null-terminated Buffer.
+     *
+     * @param value { Buffer } The Buffer to write.
+     * @param offset { Number } The offset to write the Buffer to.
+     *
+     * @return this
+     */
+    insertBufferNT(value: Buffer, offset: number): SmartBuffer;
+    /**
+     * Writes a null-terminated Buffer.
+     *
+     * @param value { Buffer } The Buffer to write.
+     * @param offset { Number } The offset to write the Buffer to.
+     *
+     * @return this
+     */
+    writeBufferNT(value: Buffer, offset?: number): SmartBuffer;
+    /**
+     * Clears the SmartBuffer instance to its original empty state.
+     */
+    clear(): SmartBuffer;
+    /**
+     * Gets the remaining data left to be read from the SmartBuffer instance.
+     *
+     * @return { Number }
+     */
+    remaining(): number;
+    /**
+     * Gets the current read offset value of the SmartBuffer instance.
+     *
+     * @return { Number }
+     */
+    /**
+    * Sets the read offset value of the SmartBuffer instance.
+    *
+    * @param offset { Number } - The offset value to set.
+    */
+    readOffset: number;
+    /**
+     * Gets the current write offset value of the SmartBuffer instance.
+     *
+     * @return { Number }
+     */
+    /**
+    * Sets the write offset value of the SmartBuffer instance.
+    *
+    * @param offset { Number } - The offset value to set.
+    */
+    writeOffset: number;
+    /**
+     * Gets the currently set string encoding of the SmartBuffer instance.
+     *
+     * @return { BufferEncoding } The string Buffer encoding currently set.
+     */
+    /**
+    * Sets the string encoding of the SmartBuffer instance.
+    *
+    * @param encoding { BufferEncoding } The string Buffer encoding to set.
+    */
+    encoding: BufferEncoding;
+    /**
+     * Gets the underlying internal Buffer. (This includes unmanaged data in the Buffer)
+     *
+     * @return { Buffer } The Buffer value.
+     */
+    readonly internalBuffer: Buffer;
+    /**
+     * Gets the value of the internal managed Buffer (Includes managed data only)
+     *
+     * @param { Buffer }
+     */
+    toBuffer(): Buffer;
+    /**
+     * Gets the String value of the internal managed Buffer
+     *
+     * @param encoding { String } The BufferEncoding to display the Buffer as (defaults to instance level encoding).
+     */
+    toString(encoding?: BufferEncoding): string;
+    /**
+     * Destroys the SmartBuffer instance.
+     */
+    destroy(): SmartBuffer;
+    /**
+     * Handles inserting and writing strings.
+     *
+     * @param value { String } The String value to insert.
+     * @param isInsert { Boolean } True if inserting a string, false if writing.
+     * @param arg2 { Number | String } The offset to insert the string at, or the BufferEncoding to use.
+     * @param encoding { String } The BufferEncoding to use for writing strings (defaults to instance encoding).
+     */
+    private _handleString;
+    /**
+     * Handles writing or insert of a Buffer.
+     *
+     * @param value { Buffer } The Buffer to write.
+     * @param offset { Number } The offset to write the Buffer to.
+     */
+    private _handleBuffer;
+    /**
+     * Ensures that the internal Buffer is large enough to read data.
+     *
+     * @param length { Number } The length of the data that needs to be read.
+     * @param offset { Number } The offset of the data that needs to be read.
+     */
+    private ensureReadable;
+    /**
+     * Ensures that the internal Buffer is large enough to insert data.
+     *
+     * @param dataLength { Number } The length of the data that needs to be written.
+     * @param offset { Number } The offset of the data to be written.
+     */
+    private ensureInsertable;
+    /**
+     * Ensures that the internal Buffer is large enough to write data.
+     *
+     * @param dataLength { Number } The length of the data that needs to be written.
+     * @param offset { Number } The offset of the data to be written (defaults to writeOffset).
+     */
+    private _ensureWriteable;
+    /**
+     * Ensures that the internal Buffer is large enough to write at least the given amount of data.
+     *
+     * @param minLength { Number } The minimum length of the data needs to be written.
+     */
+    private _ensureCapacity;
+    /**
+     * Reads a numeric number value using the provided function.
+     *
+     * @typeparam T { number | bigint } The type of the value to be read
+     *
+     * @param func { Function(offset: number) => number } The function to read data on the internal Buffer with.
+     * @param byteSize { Number } The number of bytes read.
+     * @param offset { Number } The offset to read from (optional). When this is not provided, the managed readOffset is used instead.
+     *
+     * @returns { T } the number value
+     */
+    private _readNumberValue;
+    /**
+     * Inserts a numeric number value based on the given offset and value.
+     *
+     * @typeparam T { number | bigint } The type of the value to be written
+     *
+     * @param func { Function(offset: T, offset?) => number} The function to write data on the internal Buffer with.
+     * @param byteSize { Number } The number of bytes written.
+     * @param value { T } The number value to write.
+     * @param offset { Number } the offset to write the number at (REQUIRED).
+     *
+     * @returns SmartBuffer this buffer
+     */
+    private _insertNumberValue;
+    /**
+     * Writes a numeric number value based on the given offset and value.
+     *
+     * @typeparam T { number | bigint } The type of the value to be written
+     *
+     * @param func { Function(offset: T, offset?) => number} The function to write data on the internal Buffer with.
+     * @param byteSize { Number } The number of bytes written.
+     * @param value { T } The number value to write.
+     * @param offset { Number } the offset to write the number at (REQUIRED).
+     *
+     * @returns SmartBuffer this buffer
+     */
+    private _writeNumberValue;
+}
+export { SmartBufferOptions, SmartBuffer };
diff --git a/mqtt-backend/node_modules/smart-buffer/typings/utils.d.ts b/mqtt-backend/node_modules/smart-buffer/typings/utils.d.ts
new file mode 100644
index 0000000..b32b4d4
--- /dev/null
+++ b/mqtt-backend/node_modules/smart-buffer/typings/utils.d.ts
@@ -0,0 +1,66 @@
+/// <reference types="node" />
+import { SmartBuffer } from './smartbuffer';
+import { Buffer } from 'buffer';
+/**
+ * Error strings
+ */
+declare const ERRORS: {
+    INVALID_ENCODING: string;
+    INVALID_SMARTBUFFER_SIZE: string;
+    INVALID_SMARTBUFFER_BUFFER: string;
+    INVALID_SMARTBUFFER_OBJECT: string;
+    INVALID_OFFSET: string;
+    INVALID_OFFSET_NON_NUMBER: string;
+    INVALID_LENGTH: string;
+    INVALID_LENGTH_NON_NUMBER: string;
+    INVALID_TARGET_OFFSET: string;
+    INVALID_TARGET_LENGTH: string;
+    INVALID_READ_BEYOND_BOUNDS: string;
+    INVALID_WRITE_BEYOND_BOUNDS: string;
+};
+/**
+ * Checks if a given encoding is a valid Buffer encoding. (Throws an exception if check fails)
+ *
+ * @param { String } encoding The encoding string to check.
+ */
+declare function checkEncoding(encoding: BufferEncoding): void;
+/**
+ * Checks if a given number is a finite integer. (Throws an exception if check fails)
+ *
+ * @param { Number } value The number value to check.
+ */
+declare function isFiniteInteger(value: number): boolean;
+/**
+ * Checks if a length value is valid. (Throws an exception if check fails)
+ *
+ * @param { Number } length The value to check.
+ */
+declare function checkLengthValue(length: any): void;
+/**
+ * Checks if a offset value is valid. (Throws an exception if check fails)
+ *
+ * @param { Number } offset The value to check.
+ */
+declare function checkOffsetValue(offset: any): void;
+/**
+ * Checks if a target offset value is out of bounds. (Throws an exception if check fails)
+ *
+ * @param { Number } offset The offset value to check.
+ * @param { SmartBuffer } buff The SmartBuffer instance to check against.
+ */
+declare function checkTargetOffset(offset: number, buff: SmartBuffer): void;
+interface Buffer {
+    readBigInt64BE(offset?: number): bigint;
+    readBigInt64LE(offset?: number): bigint;
+    readBigUInt64BE(offset?: number): bigint;
+    readBigUInt64LE(offset?: number): bigint;
+    writeBigInt64BE(value: bigint, offset?: number): number;
+    writeBigInt64LE(value: bigint, offset?: number): number;
+    writeBigUInt64BE(value: bigint, offset?: number): number;
+    writeBigUInt64LE(value: bigint, offset?: number): number;
+}
+/**
+ * Throws if Node.js version is too low to support bigint
+ */
+declare function bigIntAndBufferInt64Check(bufferMethod: keyof Buffer): void;
+export { ERRORS, isFiniteInteger, checkEncoding, checkOffsetValue, checkLengthValue, checkTargetOffset, bigIntAndBufferInt64Check };
diff --git a/mqtt-backend/node_modules/socks/.claude/settings.local.json b/mqtt-backend/node_modules/socks/.claude/settings.local.json
new file mode 100644
index 0000000..8422f2b
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/.claude/settings.local.json
@@ -0,0 +1,26 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(npm test:*)",
+      "Bash(npm run lint:*)",
+      "Bash(npm run build:*)",
+      "Bash(find:*)",
+      "Bash(wc:*)",
+      "Bash(git:*)",
+      "Bash(npm run:*)",
+      "Bash(npm install:*)",
+      "Bash(npm uninstall:*)",
+      "Bash(npx eslint:*)",
+      "Bash(gh issue:*)",
+      "Bash(npx vitest:*)",
+      "WebFetch(domain:www.openssh.com)",
+      "Bash(ls:*)",
+      "Bash(cat:*)",
+      "Bash(npm pack:*)",
+      "Bash(npx tsc:*)",
+      "Bash(node:*)",
+      "Bash(npm info:*)",
+      "Bash(cp:*)"
+    ]
+  }
+}
diff --git a/mqtt-backend/node_modules/socks/.eslintrc.cjs b/mqtt-backend/node_modules/socks/.eslintrc.cjs
new file mode 100644
index 0000000..cc5d089
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/.eslintrc.cjs
@@ -0,0 +1,11 @@
+module.exports = {
+  root: true,
+  parser: '@typescript-eslint/parser',
+  plugins: [
+    '@typescript-eslint',
+  ],
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+  ],
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/socks/.prettierrc.yaml b/mqtt-backend/node_modules/socks/.prettierrc.yaml
new file mode 100644
index 0000000..d7b7335
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/.prettierrc.yaml
@@ -0,0 +1,7 @@
+parser: typescript
+printWidth: 80
+tabWidth: 2
+singleQuote: true
+trailingComma: all
+arrowParens: always
+bracketSpacing: false
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/socks/LICENSE b/mqtt-backend/node_modules/socks/LICENSE
new file mode 100644
index 0000000..b2442a9
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/LICENSE
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 Josh Glazebrook
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/socks/README.md b/mqtt-backend/node_modules/socks/README.md
new file mode 100644
index 0000000..4045852
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/README.md
@@ -0,0 +1,686 @@
+# socks  [![Build Status](https://travis-ci.org/JoshGlazebrook/socks.svg?branch=master)](https://travis-ci.org/JoshGlazebrook/socks)  [![Coverage Status](https://coveralls.io/repos/github/JoshGlazebrook/socks/badge.svg?branch=master)](https://coveralls.io/github/JoshGlazebrook/socks?branch=v2)
+
+Fully featured SOCKS proxy client supporting SOCKSv4, SOCKSv4a, and SOCKSv5. Includes Bind and Associate functionality.
+
+> Looking for Node.js agent? Check [node-socks-proxy-agent](https://github.com/TooTallNate/node-socks-proxy-agent).
+
+### Features
+
+* Supports SOCKS v4, v4a, v5, and v5h protocols.
+* Supports the CONNECT, BIND, and ASSOCIATE commands.
+* Supports callbacks, promises, and events for proxy connection creation async flow control.
+* Supports proxy chaining (CONNECT only).
+* Supports user/password authentication.
+* Supports custom authentication.
+* Built in UDP frame creation & parse functions.
+* Created with TypeScript, type definitions are provided.
+
+### Requirements
+
+* Node.js v10.0+  (Please use [v1](https://github.com/JoshGlazebrook/socks/tree/82d83923ad960693d8b774cafe17443ded7ed584) for older versions of Node.js)
+
+### Looking for v1?
+* Docs for v1 are available [here](https://github.com/JoshGlazebrook/socks/tree/82d83923ad960693d8b774cafe17443ded7ed584)
+
+## Installation
+
+`yarn add socks`
+
+or
+
+`npm install --save socks`
+
+## Usage
+
+```typescript
+// TypeScript
+import { SocksClient, SocksClientOptions, SocksClientChainOptions } from 'socks';
+
+// ES6 JavaScript
+import { SocksClient } from 'socks';
+
+// Legacy JavaScript
+const SocksClient = require('socks').SocksClient;
+```
+
+## Quick Start Example
+
+Connect to github.com (192.30.253.113) on port 80, using a SOCKS proxy.
+
+```javascript
+const options = {
+  proxy: {
+    host: '159.203.75.200', // ipv4 or ipv6 or hostname
+    port: 1080,
+    type: 5 // Proxy version (4 or 5)
+  },
+
+  command: 'connect', // SOCKS command (createConnection factory function only supports the connect command)
+
+  destination: {
+    host: '192.30.253.113', // github.com (hostname lookups are supported with SOCKS v4a and 5)
+    port: 80
+  }
+};
+
+// Async/Await
+try {
+  const info = await SocksClient.createConnection(options);
+
+  console.log(info.socket);
+  // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy server)
+} catch (err) {
+  // Handle errors
+}
+
+// Promises
+SocksClient.createConnection(options)
+.then(info => {
+  console.log(info.socket);
+  // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy server)
+})
+.catch(err => {
+  // Handle errors
+});
+
+// Callbacks
+SocksClient.createConnection(options, (err, info) => {
+  if (!err) {
+    console.log(info.socket);
+    // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy server)
+  } else {
+    // Handle errors
+  }
+});
+```
+
+## Chaining Proxies
+
+**Note:** Chaining is only supported when using the SOCKS connect command, and chaining can only be done through the special factory chaining function.
+
+This example makes a proxy chain through two SOCKS proxies to ip-api.com. Once the connection to the destination is established it sends an HTTP request to get a JSON response that returns ip info for the requesting ip.
+
+```javascript
+const options = {
+  destination: {
+    host: 'ip-api.com', // host names are supported with SOCKS v4a and SOCKS v5.
+    port: 80
+  },
+  command: 'connect', // Only the connect command is supported when chaining proxies.
+  proxies: [ // The chain order is the order in the proxies array, meaning the last proxy will establish a connection to the destination.
+    {
+      host: '159.203.75.235', // ipv4, ipv6, or hostname
+      port: 1081,
+      type: 5
+    },
+    {
+      host: '104.131.124.203', // ipv4, ipv6, or hostname
+      port: 1081,
+      type: 5
+    }
+  ]
+}
+
+// Async/Await
+try {
+  const info = await SocksClient.createConnectionChain(options);
+
+  console.log(info.socket);
+  // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy servers)
+
+  console.log(info.socket.remoteAddress) // The remote address of the returned socket is the first proxy in the chain.
+  // 159.203.75.235
+
+  info.socket.write('GET /json HTTP/1.1\nHost: ip-api.com\n\n');
+  info.socket.on('data', (data) => {
+    console.log(data.toString()); // ip-api.com sees that the last proxy in the chain (104.131.124.203) is connected to it.
+    /*
+      HTTP/1.1 200 OK
+      Access-Control-Allow-Origin: *
+      Content-Type: application/json; charset=utf-8
+      Date: Sun, 24 Dec 2017 03:47:51 GMT
+      Content-Length: 300
+
+      {
+        "as":"AS14061 Digital Ocean, Inc.",
+        "city":"Clifton",
+        "country":"United States",
+        "countryCode":"US",
+        "isp":"Digital Ocean",
+        "lat":40.8326,
+        "lon":-74.1307,
+        "org":"Digital Ocean",
+        "query":"104.131.124.203",
+        "region":"NJ",
+        "regionName":"New Jersey",
+        "status":"success",
+        "timezone":"America/New_York",
+        "zip":"07014"
+      }
+    */
+  });
+} catch (err) {
+  // Handle errors
+}
+
+// Promises
+SocksClient.createConnectionChain(options)
+.then(info => {
+  console.log(info.socket);
+  // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy server)
+
+  console.log(info.socket.remoteAddress) // The remote address of the returned socket is the first proxy in the chain.
+  // 159.203.75.235
+
+  info.socket.write('GET /json HTTP/1.1\nHost: ip-api.com\n\n');
+  info.socket.on('data', (data) => {
+    console.log(data.toString()); // ip-api.com sees that the last proxy in the chain (104.131.124.203) is connected to it.
+    /*
+      HTTP/1.1 200 OK
+      Access-Control-Allow-Origin: *
+      Content-Type: application/json; charset=utf-8
+      Date: Sun, 24 Dec 2017 03:47:51 GMT
+      Content-Length: 300
+
+      {
+        "as":"AS14061 Digital Ocean, Inc.",
+        "city":"Clifton",
+        "country":"United States",
+        "countryCode":"US",
+        "isp":"Digital Ocean",
+        "lat":40.8326,
+        "lon":-74.1307,
+        "org":"Digital Ocean",
+        "query":"104.131.124.203",
+        "region":"NJ",
+        "regionName":"New Jersey",
+        "status":"success",
+        "timezone":"America/New_York",
+        "zip":"07014"
+      }
+    */
+  });
+})
+.catch(err => {
+  // Handle errors
+});
+
+// Callbacks
+SocksClient.createConnectionChain(options, (err, info) => {
+  if (!err) {
+    console.log(info.socket);
+    // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy server)
+
+    console.log(info.socket.remoteAddress) // The remote address of the returned socket is the first proxy in the chain.
+  // 159.203.75.235
+
+  info.socket.write('GET /json HTTP/1.1\nHost: ip-api.com\n\n');
+  info.socket.on('data', (data) => {
+    console.log(data.toString()); // ip-api.com sees that the last proxy in the chain (104.131.124.203) is connected to it.
+    /*
+      HTTP/1.1 200 OK
+      Access-Control-Allow-Origin: *
+      Content-Type: application/json; charset=utf-8
+      Date: Sun, 24 Dec 2017 03:47:51 GMT
+      Content-Length: 300
+
+      {
+        "as":"AS14061 Digital Ocean, Inc.",
+        "city":"Clifton",
+        "country":"United States",
+        "countryCode":"US",
+        "isp":"Digital Ocean",
+        "lat":40.8326,
+        "lon":-74.1307,
+        "org":"Digital Ocean",
+        "query":"104.131.124.203",
+        "region":"NJ",
+        "regionName":"New Jersey",
+        "status":"success",
+        "timezone":"America/New_York",
+        "zip":"07014"
+      }
+    */
+  });
+  } else {
+    // Handle errors
+  }
+});
+```
+
+## Bind Example (TCP Relay)
+
+When the bind command is sent to a SOCKS v4/v5 proxy server, the proxy server starts listening on a new TCP port and the proxy relays then remote host information back to the client. When another remote client connects to the proxy server on this port the SOCKS proxy sends a notification that an incoming connection has been accepted to the initial client and a full duplex stream is now established to the initial client and the client that connected to that special port.
+
+```javascript
+const options = {
+  proxy: {
+    host: '159.203.75.235', // ipv4, ipv6, or hostname
+    port: 1081,
+    type: 5
+  },
+
+  command: 'bind',
+
+  // When using BIND, the destination should be the remote client that is expected to connect to the SOCKS proxy. Using 0.0.0.0 makes the Proxy accept any incoming connection on that port.
+  destination: {
+    host: '0.0.0.0',
+    port: 0
+  }
+};
+
+// Creates a new SocksClient instance.
+const client = new SocksClient(options);
+
+// When the SOCKS proxy has bound a new port and started listening, this event is fired.
+client.on('bound', info => {
+  console.log(info.remoteHost);
+  /*
+  {
+    host: "159.203.75.235",
+    port: 57362
+  }
+  */
+});
+
+// When a client connects to the newly bound port on the SOCKS proxy, this event is fired.
+client.on('established', info => {
+  // info.remoteHost is the remote address of the client that connected to the SOCKS proxy.
+  console.log(info.remoteHost);
+  /*
+    host: 67.171.34.23,
+    port: 49823
+  */
+
+  console.log(info.socket);
+  // <Socket ...>  (This is a raw net.Socket that is a connection between the initial client and the remote client that connected to the proxy)
+
+  // Handle received data...
+  info.socket.on('data', data => {
+    console.log('recv', data);
+  });
+});
+
+// An error occurred trying to establish this SOCKS connection.
+client.on('error', err => {
+  console.error(err);
+});
+
+// Start connection to proxy
+client.connect();
+```
+
+## Associate Example (UDP Relay)
+
+When the associate command is sent to a SOCKS v5 proxy server, it sets up a UDP relay that allows the client to send UDP packets to a remote host through the proxy server, and also receive UDP packet responses back through the proxy server.
+
+```javascript
+const options = {
+  proxy: {
+    host: '159.203.75.235', // ipv4, ipv6, or hostname
+    port: 1081,
+    type: 5
+  },
+
+  command: 'associate',
+
+  // When using associate, the destination should be the remote client that is expected to send UDP packets to the proxy server to be forwarded. This should be your local ip, or optionally the wildcard address (0.0.0.0)  UDP Client <-> Proxy <-> UDP Client
+  destination: {
+    host: '0.0.0.0',
+    port: 0
+  }
+};
+
+// Create a local UDP socket for sending packets to the proxy.
+const udpSocket = dgram.createSocket('udp4');
+udpSocket.bind();
+
+// Listen for incoming UDP packets from the proxy server.
+udpSocket.on('message', (message, rinfo) => {
+  console.log(SocksClient.parseUDPFrame(message));
+  /*
+  { frameNumber: 0,
+    remoteHost: { host: '165.227.108.231', port: 4444 }, // The remote host that replied with a UDP packet
+    data: <Buffer 74 65 73 74 0a> // The data
+  }
+  */
+});
+
+let client = new SocksClient(options);
+
+// When the UDP relay is established, this event is fired and includes the UDP relay port to send data to on the proxy server.
+client.on('established', info => {
+  console.log(info.remoteHost);
+  /*
+    {
+      host: '159.203.75.235',
+      port: 44711
+    }
+  */
+
+  // Send 'hello' to 165.227.108.231:4444
+  const packet = SocksClient.createUDPFrame({
+    remoteHost: { host: '165.227.108.231', port: 4444 },
+    data: Buffer.from('hello')
+  });
+  udpSocket.send(packet, info.remoteHost.port, info.remoteHost.host);
+});
+
+// Start connection
+client.connect();
+```
+
+**Note:** The associate TCP connection to the proxy must remain open for the UDP relay to work.
+
+## Additional Examples
+
+[Documentation](docs/index.md)
+
+
+## Migrating from v1
+
+Looking for a guide to migrate from v1? Look [here](docs/migratingFromV1.md)
+
+## Api Reference:
+
+**Note:** socks includes full TypeScript definitions. These can even be used without using TypeScript as most IDEs (such as VS Code) will use these type definition files for auto completion intellisense even in JavaScript files.
+
+* Class: SocksClient
+  * [new SocksClient(options[, callback])](#new-socksclientoptions)
+  * [Class Method: SocksClient.createConnection(options[, callback])](#class-method-socksclientcreateconnectionoptions-callback)
+  * [Class Method: SocksClient.createConnectionChain(options[, callback])](#class-method-socksclientcreateconnectionchainoptions-callback)
+  * [Class Method: SocksClient.createUDPFrame(options)](#class-method-socksclientcreateudpframedetails)
+  * [Class Method: SocksClient.parseUDPFrame(data)](#class-method-socksclientparseudpframedata)
+  * [Event: 'error'](#event-error)
+  * [Event: 'bound'](#event-bound)
+  * [Event: 'established'](#event-established)
+  * [client.connect()](#clientconnect)
+  * [client.socksClientOptions](#clientconnect)
+
+### SocksClient
+
+SocksClient establishes SOCKS proxy connections to remote destination hosts. These proxy connections are fully transparent to the server and once established act as full duplex streams. SOCKS v4, v4a, v5, and v5h are supported, as well as the connect, bind, and associate commands.
+
+SocksClient supports creating connections using callbacks, promises, and async/await flow control using two static factory functions createConnection and createConnectionChain. It also internally extends EventEmitter which results in allowing event handling based async flow control.
+
+**SOCKS Compatibility Table**
+
+Note: When using 4a please specify type: 4, and when using 5h please specify type 5.
+
+| Socks Version | TCP | UDP | IPv4 | IPv6 | Hostname |
+| --- | :---: | :---: | :---: | :---: | :---: |
+| SOCKS v4 | ✅ | ❌ | ✅ | ❌ | ❌ |
+| SOCKS v4a | ✅ | ❌ | ✅ | ❌ | ✅ |
+| SOCKS v5 (includes v5h) | ✅ | ✅ | ✅ | ✅ | ✅ |
+
+### new SocksClient(options)
+
+* ```options``` {SocksClientOptions} - An object describing the SOCKS proxy to use, the command to send and establish, and the destination host to connect to.
+
+### SocksClientOptions
+
+```typescript
+{
+  proxy: {
+    host: '159.203.75.200', // ipv4, ipv6, or hostname
+    port: 1080,
+    type: 5, // Proxy version (4 or 5). For v4a use 4, for v5h use 5.
+
+    // Optional fields
+    userId: 'some username', // Used for SOCKS4 userId auth, and SOCKS5 user/pass auth in conjunction with password.
+    password: 'some password', // Used in conjunction with userId for user/pass auth for SOCKS5 proxies.
+    custom_auth_method: 0x80,  // If using a custom auth method, specify the type here. If this is set, ALL other custom_auth_*** options must be set as well.
+    custom_auth_request_handler: async () =>. {
+      // This will be called when it's time to send the custom auth handshake. You must return a Buffer containing the data to send as your authentication.
+      return Buffer.from([0x01,0x02,0x03]);
+    },
+    // This is the expected size (bytes) of the custom auth response from the proxy server.
+    custom_auth_response_size: 2,
+    // This is called when the auth response is received. The received packet is passed in as a Buffer, and you must return a boolean indicating the response from the server said your custom auth was successful or failed.
+    custom_auth_response_handler: async (data) => {
+      return data[1] === 0x00;
+    }
+  },
+
+  command: 'connect', // connect, bind, associate
+
+  destination: {
+    host: '192.30.253.113', // ipv4, ipv6, hostname. Hostnames work with v4a and v5.
+    port: 80
+  },
+
+  // Optional fields
+  timeout: 30000, // How long to wait to establish a proxy connection. (defaults to 30 seconds)
+
+  set_tcp_nodelay: true // If true, will turn on the underlying sockets TCP_NODELAY option.
+}
+```
+
+### Class Method: SocksClient.createConnection(options[, callback])
+* ```options``` { SocksClientOptions } - An object describing the SOCKS proxy to use, the command to send and establish, and the destination host to connect to.
+* ```callback``` { Function } - Optional callback function that is called when the proxy connection is established, or an error occurs.
+* ```returns``` { Promise } - A Promise is returned that is resolved when the proxy connection is established, or rejected when an error occurs.
+
+Creates a new proxy connection through the given proxy to the given destination host. This factory function supports callbacks and promises for async flow control.
+
+**Note:** If a callback function is provided, the promise will always resolve regardless of an error occurring. Please be sure to exclusively use either promises or callbacks when using this factory function.
+
+```typescript
+const options = {
+  proxy: {
+    host: '159.203.75.200', // ipv4, ipv6, or hostname
+    port: 1080,
+    type: 5 // Proxy version (4 or 5)
+  },
+
+  command: 'connect', // connect, bind, associate
+
+  destination: {
+    host: '192.30.253.113', // ipv4, ipv6, or hostname
+    port: 80
+  }
+}
+
+// Await/Async (uses a Promise)
+try {
+  const info = await SocksClient.createConnection(options);
+  console.log(info);
+  /*
+  {
+    socket: <Socket ...>,  // Raw net.Socket
+  }
+  */
+  / <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy server)
+
+} catch (err) {
+  // Handle error...
+}
+
+// Promise
+SocksClient.createConnection(options)
+.then(info => {
+  console.log(info);
+  /*
+  {
+    socket: <Socket ...>,  // Raw net.Socket
+  }
+  */
+})
+.catch(err => {
+  // Handle error...
+});
+
+// Callback
+SocksClient.createConnection(options, (err, info) => {
+  if (!err) {
+    console.log(info);
+  /*
+  {
+    socket: <Socket ...>,  // Raw net.Socket
+  }
+  */
+  } else {
+    // Handle error...
+  }
+});
+```
+
+### Class Method: SocksClient.createConnectionChain(options[, callback])
+* ```options``` { SocksClientChainOptions } - An object describing a list of SOCKS proxies to use, the command to send and establish, and the destination host to connect to.
+* ```callback``` { Function } - Optional callback function that is called when the proxy connection chain is established, or an error occurs.
+* ```returns``` { Promise } - A Promise is returned that is resolved when the proxy connection chain is established, or rejected when an error occurs.
+
+Creates a new proxy connection chain through a list of at least two SOCKS proxies to the given destination host. This factory method supports callbacks and promises for async flow control.
+
+**Note:** If a callback function is provided, the promise will always resolve regardless of an error occurring. Please be sure to exclusively use either promises or callbacks when using this factory function.
+
+**Note:** At least two proxies must be provided for the chain to be established.
+
+```typescript
+const options = {
+  proxies: [ // The chain order is the order in the proxies array, meaning the last proxy will establish a connection to the destination.
+    {
+      host: '159.203.75.235', // ipv4, ipv6, or hostname
+      port: 1081,
+      type: 5
+    },
+    {
+      host: '104.131.124.203', // ipv4, ipv6, or hostname
+      port: 1081,
+      type: 5
+    }
+  ]
+
+  command: 'connect', // Only connect is supported in chaining mode.
+
+  destination: {
+    host: '192.30.253.113', // ipv4, ipv6, hostname
+    port: 80
+  }
+}
+```
+
+### Class Method: SocksClient.createUDPFrame(details)
+* ```details``` { SocksUDPFrameDetails } - An object containing the remote host, frame number, and frame data to use when creating a SOCKS UDP frame packet.
+* ```returns``` { Buffer } - A Buffer containing all of the UDP frame data.
+
+Creates a SOCKS UDP frame relay packet that is sent and received via a SOCKS proxy when using the associate command for UDP packet forwarding.
+
+**SocksUDPFrameDetails**
+
+```typescript
+{
+  frameNumber: 0, // The frame number (used for breaking up larger packets)
+
+  remoteHost: { // The remote host to have the proxy send data to, or the remote host that send this data.
+    host: '1.2.3.4',
+    port: 1234
+  },
+
+  data: <Buffer 01 02 03 04...> // A Buffer instance of data to include in the packet (actual data sent to the remote host)
+}
+interface SocksUDPFrameDetails {
+  // The frame number of the packet.
+  frameNumber?: number;
+
+  // The remote host.
+  remoteHost: SocksRemoteHost;
+
+  // The packet data.
+  data: Buffer;
+}
+```
+
+### Class Method: SocksClient.parseUDPFrame(data)
+* ```data``` { Buffer } - A Buffer instance containing SOCKS UDP frame data to parse.
+* ```returns``` { SocksUDPFrameDetails } - An object containing the remote host, frame number, and frame data of the SOCKS UDP frame.
+
+```typescript
+const frame = SocksClient.parseUDPFrame(data);
+console.log(frame);
+/*
+{
+  frameNumber: 0,
+  remoteHost: {
+    host: '1.2.3.4',
+    port: 1234
+  },
+  data: <Buffer 01 02 03 04 ...>
+}
+*/
+```
+
+Parses a Buffer instance and returns the parsed SocksUDPFrameDetails object.
+
+## Event: 'error'
+* ```err``` { SocksClientError } - An Error object containing an error message and the original SocksClientOptions.
+
+This event is emitted if an error occurs when trying to establish the proxy connection.
+
+## Event: 'bound'
+* ```info``` { SocksClientBoundEvent } An object containing a Socket and SocksRemoteHost info.
+
+This event is emitted when using the BIND command on a remote SOCKS proxy server. This event indicates the proxy server is now listening for incoming connections on a specified port.
+
+**SocksClientBoundEvent**
+```typescript
+{
+  socket: net.Socket, // The underlying raw Socket
+  remoteHost: {
+    host: '1.2.3.4', // The remote host that is listening (usually the proxy itself)
+    port: 4444 // The remote port the proxy is listening on for incoming connections (when using BIND).
+  }
+}
+```
+
+## Event: 'established'
+* ```info``` { SocksClientEstablishedEvent } An object containing a Socket and SocksRemoteHost info.
+
+This event is emitted when the following conditions are met:
+1. When using the CONNECT command, and a proxy connection has been established to the remote host.
+2. When using the BIND command, and an incoming connection has been accepted by the proxy and a TCP relay has been established.
+3. When using the ASSOCIATE command, and a UDP relay has been established.
+
+When using BIND, 'bound' is first emitted to indicate the SOCKS server is waiting for an incoming connection, and provides the remote port the SOCKS server is listening on.
+
+When using ASSOCIATE, 'established' is emitted with the remote UDP port the SOCKS server is accepting UDP frame packets on.
+
+**SocksClientEstablishedEvent**
+```typescript
+{
+  socket: net.Socket, // The underlying raw Socket
+  remoteHost: {
+    host: '1.2.3.4', // The remote host that is listening (usually the proxy itself)
+    port: 52738 // The remote port the proxy is listening on for incoming connections (when using BIND).
+  }
+}
+```
+
+## client.connect()
+
+Starts connecting to the remote SOCKS proxy server to establish a proxy connection to the destination host.
+
+## client.socksClientOptions
+* ```returns``` { SocksClientOptions } The options that were passed to the SocksClient.
+
+Gets the options that were passed to the SocksClient when it was created.
+
+
+**SocksClientError**
+```typescript
+{ // Subclassed from Error.
+  message: 'An error has occurred',
+  options: {
+    // SocksClientOptions
+  }
+}
+```
+
+# Further Reading:
+
+Please read the SOCKS 5 specifications for more information on how to use BIND and Associate.
+http://www.ietf.org/rfc/rfc1928.txt
+
+# License
+
+This work is licensed under the [MIT license](http://en.wikipedia.org/wiki/MIT_License).
diff --git a/mqtt-backend/node_modules/socks/docs/examples/index.md b/mqtt-backend/node_modules/socks/docs/examples/index.md
new file mode 100644
index 0000000..87bfe25
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/docs/examples/index.md
@@ -0,0 +1,17 @@
+# socks examples
+
+## TypeScript Examples
+
+[Connect command](typescript/connectExample.md)
+
+[Bind command](typescript/bindExample.md)
+
+[Associate command](typescript/associateExample.md)
+
+## JavaScript Examples
+
+[Connect command](javascript/connectExample.md)
+
+[Bind command](javascript/bindExample.md)
+
+[Associate command](javascript/associateExample.md)
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/socks/docs/examples/javascript/associateExample.md b/mqtt-backend/node_modules/socks/docs/examples/javascript/associateExample.md
new file mode 100644
index 0000000..c2c7b17
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/docs/examples/javascript/associateExample.md
@@ -0,0 +1,90 @@
+# socks examples
+
+## Example for SOCKS 'associate' command
+
+The associate command tells the SOCKS proxy server to establish a UDP relay. The server binds to a new UDP port and communicates the newly opened port back to the origin client. From here, any SOCKS UDP frame packets sent to this special UDP port on the Proxy server will be forwarded to the desired destination, and any responses will be forwarded back to the origin client (you).
+
+This can be used for things such as DNS queries, and other UDP communicates.
+
+**Connection Steps**
+
+1. Client -(associate)-> Proxy (Tells the proxy to create a UDP relay and bind on a new port)
+2. Client <-(port)- Proxy (Tells the origin client which port it opened and is accepting UDP frame packets on)
+
+At this point the proxy is accepting UDP frames on the specified port.
+
+3. Client --(udp frame) -> Proxy -> Destination (The origin client sends a UDP frame to the proxy on the UDP port, and the proxy then forwards it to the destination specified in the UDP frame.)
+4. Client <--(udp frame) <-- Proxy <-- Destination (The destination client responds to the udp packet sent in #3)
+
+## Usage
+
+The 'associate' command can only be used by creating a new SocksClient instance and listening for the 'established' event.
+
+**Note:** UDP packets relayed through the proxy servers are encompassed in a special Socks UDP frame format. SocksClient.createUDPFrame() and SocksClient.parseUDPFrame() create and parse these special UDP packets.
+
+```typescript
+const dgram = require('dgram');
+const SocksClient = require('socks').SocksClient;
+
+// Create a local UDP socket for sending/receiving packets to/from the proxy.
+const udpSocket = dgram.createSocket('udp4');
+udpSocket.bind();
+
+// Listen for incoming UDP packets from the proxy server.
+udpSocket.on('message', (message, rinfo) => {
+  console.log(SocksClient.parseUDPFrame(message));
+  /*
+  { frameNumber: 0,
+    remoteHost: { host: '8.8.8.8', port: 53 }, // The remote host that replied with a UDP packet
+    data: <Buffer 74 65 73 74 0a> // The data
+  }
+  */
+});
+
+const options = {
+  proxy: {
+    host: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  // This should be the ip and port of the expected client that will be sending UDP frames to the newly opened UDP port on the server.
+  // Most SOCKS servers accept 0.0.0.0 as a wildcard address to accept UDP frames from any source.
+  destination: {
+    host: '0.0.0.0',
+    port: 0
+  },
+
+  command: 'associate'
+};
+
+const client = new SocksClient(options);
+
+// This event is fired when the SOCKS server has started listening on a new UDP port for UDP relaying.
+client.on('established', info => {
+  console.log(info);
+  /*
+  {
+    socket: <Socket ...>,
+    remoteHost: { // This is the remote port on the SOCKS proxy server to send UDP frame packets to.
+      host: '104.131.124.203',
+      port: 58232
+    }
+  }
+  */
+
+  // Send a udp frame to 8.8.8.8 on port 53 through the proxy.
+  const packet = SocksClient.createUDPFrame({
+    remoteHost: { host: '8.8.8.8', port: 53 },
+    data: Buffer.from('hello') // A DNS lookup in the real world.
+  });
+
+  // Send packet.
+  udpSocket.send(packet, info.remoteHost.port, info.remoteHost.host);
+});
+
+// SOCKS proxy failed to bind.
+client.on('error', () => {
+  // Handle errors
+});
+```
diff --git a/mqtt-backend/node_modules/socks/docs/examples/javascript/bindExample.md b/mqtt-backend/node_modules/socks/docs/examples/javascript/bindExample.md
new file mode 100644
index 0000000..be601d5
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/docs/examples/javascript/bindExample.md
@@ -0,0 +1,83 @@
+# socks examples
+
+## Example for SOCKS 'bind' command
+
+The bind command tells the SOCKS proxy server to bind and listen on a new TCP port for an incoming connection. It communicates the newly opened port back to the origin client. Once a incoming connection is accepted by the SOCKS proxy server it then communicates the remote host that connected to the SOCKS proxy back through the same initial connection via the origin client.
+
+This can be used for things such as FTP clients which require incoming TCP connections, etc.
+
+**Connection Steps**
+
+1. Client -(bind)-> Proxy    (Tells the proxy to bind to a new port)
+2. Client <-(port)- Proxy    (Tells the origin client which port it opened)
+3. Client2 --> Proxy    (Other client connects to the proxy on this port)
+4. Client <--(client2's host info)  (Proxy tells the origin client who connected to it)
+5. Original connection to the proxy is now a full TCP stream between client (you) and client2.
+6. Client <--> Proxy <--> Client2
+
+
+## Usage
+
+The 'bind' command can only be used by creating a new SocksClient instance and listening for 'bound' and 'established' events.
+
+
+```typescript
+const SocksClient = require('socks').SocksClient;
+
+const options = {
+  proxy: {
+    host: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  // This should be the ip and port of the expected client that will connect to the SOCKS proxy server on the newly bound port.
+  // Most SOCKS servers accept 0.0.0.0 as a wildcard address to accept any client.
+  destination: {
+    host: '0.0.0.0',
+    port: 0
+  },
+
+  command: 'bind'
+};
+
+const client = new SocksClient(options);
+
+// This event is fired when the SOCKS server has started listening on a new port for incoming connections.
+client.on('bound', (info) => {
+  console.log(info);
+  /*
+  {
+    socket: <Socket ...>,
+    remoteHost: { // This is the remote ip and port of the SOCKS proxy that is now accepting incoming connections.
+      host: '104.131.124.203',
+      port: 49928
+    }
+  }
+  */
+});
+
+// This event is fired when the SOCKS server has accepted an incoming connection on the newly bound port.
+client.on('established', (info) => {
+  console.log(info);
+  /*
+  {
+    socket: <Socket ...>,
+    remoteHost: { // This is the remote ip and port that connected to the SOCKS proxy on the newly bound port.
+      host: '1.2.3.4',
+      port: 58232
+    }
+  }
+  */
+
+  // At this point info.socket is a regular net.Socket TCP connection between client and client2 (1.2.3.4) (the client which connected to the proxy on the newly bound port.)
+
+  console.log(info.socket);
+  // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy servers)
+});
+
+// SOCKS proxy failed to bind.
+client.on('error', () => {
+  // Handle errors
+});
+```
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/socks/docs/examples/javascript/connectExample.md b/mqtt-backend/node_modules/socks/docs/examples/javascript/connectExample.md
new file mode 100644
index 0000000..66244c5
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/docs/examples/javascript/connectExample.md
@@ -0,0 +1,258 @@
+# socks examples
+
+## Example for SOCKS 'connect' command
+
+The connect command is the most common use-case for a SOCKS proxy. This establishes a direct connection to a destination host through a proxy server. The destination host only has knowledge of the proxy server connecting to it and does not know about the origin client (you).
+
+**Origin Client (you) <-> Proxy Server <-> Destination Server**
+
+In this example, we are connecting to a web server on port 80, and sending a very basic HTTP request to receive a response. It's worth noting that there are many socks-http-agents that can be used with the node http module (and libraries such as request.js) to make this easier. This HTTP request is used as a simple example.
+
+The 'connect' command can be used via the SocksClient.createConnection() factory function as well as by creating a SocksClient instance and using event handlers.
+
+### Using createConnection with async/await
+
+Since SocksClient.createConnection returns a Promise, we can easily use async/await for flow control.
+
+```typescript
+const SocksClient = require('socks').SocksClient;
+
+const options  = {
+  proxy: {
+    host: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  destination: {
+    host: 'ip-api.com', // host names are supported with SOCKS v4a and SOCKS v5.
+    port: 80
+  },
+
+  command: 'connect'
+};
+
+async function start() {
+  try {
+    const info = await SocksClient.createConnection(options);
+
+    console.log(info.socket);
+    // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy servers)
+
+    info.socket.write('GET /json HTTP/1.1\nHost: ip-api.com\n\n');
+    info.socket.on('data', (data) => {
+      console.log(data.toString()); // ip-api.com sees that the last proxy (104.131.124.203) is connected to it and not the origin client (you).
+      /*
+        HTTP/1.1 200 OK
+        Access-Control-Allow-Origin: *
+        Content-Type: application/json; charset=utf-8
+        Date: Sun, 24 Dec 2017 03:47:51 GMT
+        Content-Length: 300
+
+        {
+          "as":"AS14061 Digital Ocean, Inc.",
+          "city":"Clifton",
+          "country":"United States",
+          "countryCode":"US",
+          "isp":"Digital Ocean",
+          "lat":40.8326,
+          "lon":-74.1307,
+          "org":"Digital Ocean",
+          "query":"104.131.124.203",
+          "region":"NJ",
+          "regionName":"New Jersey",
+          "status":"success",
+          "timezone":"America/New_York",
+          "zip":"07014"
+        }
+      */
+  } catch (err) {
+    // Handle errors
+  }
+}
+
+start();
+```
+
+### Using createConnection with Promises
+
+```typescript
+const SocksClient = require('socks').SocksClient;
+
+const options  = {
+  proxy: {
+    ipaddress: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  destination: {
+    host: 'ip-api.com', // host names are supported with SOCKS v4a and SOCKS v5.
+    port: 80
+  },
+
+  command: 'connect'
+};
+
+SocksClient.createConnection(options)
+.then(info => {
+  console.log(info.socket);
+  // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy servers)
+
+  info.socket.write('GET /json HTTP/1.1\nHost: ip-api.com\n\n');
+  info.socket.on('data', (data) => {
+    console.log(data.toString()); // ip-api.com sees that the last proxy (104.131.124.203) is connected to it and not the origin client (you).
+    /*
+      HTTP/1.1 200 OK
+      Access-Control-Allow-Origin: *
+      Content-Type: application/json; charset=utf-8
+      Date: Sun, 24 Dec 2017 03:47:51 GMT
+      Content-Length: 300
+
+      {
+        "as":"AS14061 Digital Ocean, Inc.",
+        "city":"Clifton",
+        "country":"United States",
+        "countryCode":"US",
+        "isp":"Digital Ocean",
+        "lat":40.8326,
+        "lon":-74.1307,
+        "org":"Digital Ocean",
+        "query":"104.131.124.203",
+        "region":"NJ",
+        "regionName":"New Jersey",
+        "status":"success",
+        "timezone":"America/New_York",
+        "zip":"07014"
+      }
+    */
+})
+.catch(err => {
+  // handle errors
+});
+```
+
+### Using createConnection with callbacks
+
+SocksClient.createConnection() optionally accepts a callback function as a second parameter.
+
+**Note:** If a callback function is provided, a Promise is still returned from the function, but the promise will always resolve regardless of if there was en error. (tldr: Do not mix callbacks and Promises).
+
+```typescript
+const SocksClient = require('socks').SocksClient;
+
+const options  = {
+  proxy: {
+    ipaddress: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  destination: {
+    host: 'ip-api.com', // host names are supported with SOCKS v4a and SOCKS v5.
+    port: 80
+  },
+
+  command: 'connect'
+};
+
+SocksClient.createConnection(options, (err, info) => {
+  if (err) {
+    // handle errors
+  } else {
+    console.log(info.socket);
+    // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy servers)
+
+    info.socket.write('GET /json HTTP/1.1\nHost: ip-api.com\n\n');
+    info.socket.on('data', (data) => {
+      console.log(data.toString()); // ip-api.com sees that the last proxy (104.131.124.203) is connected to it and not the origin client (you).
+      /*
+        HTTP/1.1 200 OK
+        Access-Control-Allow-Origin: *
+        Content-Type: application/json; charset=utf-8
+        Date: Sun, 24 Dec 2017 03:47:51 GMT
+        Content-Length: 300
+
+        {
+          "as":"AS14061 Digital Ocean, Inc.",
+          "city":"Clifton",
+          "country":"United States",
+          "countryCode":"US",
+          "isp":"Digital Ocean",
+          "lat":40.8326,
+          "lon":-74.1307,
+          "org":"Digital Ocean",
+          "query":"104.131.124.203",
+          "region":"NJ",
+          "regionName":"New Jersey",
+          "status":"success",
+          "timezone":"America/New_York",
+          "zip":"07014"
+        }
+      */
+  }
+})
+```
+
+### Using event handlers
+
+SocksClient also supports instance creation of a SocksClient. This allows for event based flow control.
+
+```typescript
+const SocksClient = require('socks').SocksClient;
+
+const options  = {
+  proxy: {
+    ipaddress: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  destination: {
+    host: 'ip-api.com', // host names are supported with SOCKS v4a and SOCKS v5.
+    port: 80
+  },
+
+  command: 'connect'
+};
+
+const client = new SocksClient(options);
+
+client.on('established', (info) => {
+  console.log(info.socket);
+  // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy servers)
+
+  info.socket.write('GET /json HTTP/1.1\nHost: ip-api.com\n\n');
+  info.socket.on('data', (data) => {
+    console.log(data.toString()); // ip-api.com sees that the last proxy (104.131.124.203) is connected to it and not the origin client (you).
+    /*
+      HTTP/1.1 200 OK
+      Access-Control-Allow-Origin: *
+      Content-Type: application/json; charset=utf-8
+      Date: Sun, 24 Dec 2017 03:47:51 GMT
+      Content-Length: 300
+
+      {
+        "as":"AS14061 Digital Ocean, Inc.",
+        "city":"Clifton",
+        "country":"United States",
+        "countryCode":"US",
+        "isp":"Digital Ocean",
+        "lat":40.8326,
+        "lon":-74.1307,
+        "org":"Digital Ocean",
+        "query":"104.131.124.203",
+        "region":"NJ",
+        "regionName":"New Jersey",
+        "status":"success",
+        "timezone":"America/New_York",
+        "zip":"07014"
+      }
+    */
+});
+
+// Failed to establish proxy connection to destination.
+client.on('error', () => {
+  // Handle errors
+});
+```
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/socks/docs/examples/typescript/associateExample.md b/mqtt-backend/node_modules/socks/docs/examples/typescript/associateExample.md
new file mode 100644
index 0000000..e8ca193
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/docs/examples/typescript/associateExample.md
@@ -0,0 +1,93 @@
+# socks examples
+
+## Example for SOCKS 'associate' command
+
+The associate command tells the SOCKS proxy server to establish a UDP relay. The server binds to a new UDP port and communicates the newly opened port back to the origin client. From here, any SOCKS UDP frame packets sent to this special UDP port on the Proxy server will be forwarded to the desired destination, and any responses will be forwarded back to the origin client (you).
+
+This can be used for things such as DNS queries, and other UDP communicates.
+
+**Connection Steps**
+
+1. Client -(associate)-> Proxy (Tells the proxy to create a UDP relay and bind on a new port)
+2. Client <-(port)- Proxy (Tells the origin client which port it opened and is accepting UDP frame packets on)
+
+At this point the proxy is accepting UDP frames on the specified port.
+
+3. Client --(udp frame) -> Proxy -> Destination (The origin client sends a UDP frame to the proxy on the UDP port, and the proxy then forwards it to the destination specified in the UDP frame.)
+4. Client <--(udp frame) <-- Proxy <-- Destination (The destination client responds to the udp packet sent in #3)
+
+## Usage
+
+The 'associate' command can only be used by creating a new SocksClient instance and listening for the 'established' event.
+
+**Note:** UDP packets relayed through the proxy servers are packaged in a special Socks UDP frame format. SocksClient.createUDPFrame() and SocksClient.parseUDPFrame() create and parse these special UDP packets.
+
+```typescript
+import * as dgram from 'dgram';
+import { SocksClient, SocksClientOptions } from 'socks';
+
+// Create a local UDP socket for sending/receiving packets to/from the proxy.
+const udpSocket = dgram.createSocket('udp4');
+udpSocket.bind();
+
+// Listen for incoming UDP packets from the proxy server.
+udpSocket.on('message', (message, rinfo) => {
+  console.log(SocksClient.parseUDPFrame(message));
+  /*
+  { frameNumber: 0,
+    remoteHost: { host: '8.8.8.8', port: 53 }, // The remote host that replied with a UDP packet
+    data: <Buffer 74 65 73 74 0a> // The data
+  }
+  */
+});
+
+const options: SocksClientOptions = {
+  proxy: {
+    host: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  // This should be the ip and port of the expected client that will be sending UDP frames to the newly opened UDP port on the server.
+  // Most SOCKS servers accept 0.0.0.0 as a wildcard address to accept UDP frames from any source.
+  destination: {
+    host: '0.0.0.0',
+    port: 0
+  },
+
+  command: 'associate'
+};
+
+const client = new SocksClient(options);
+
+// This event is fired when the SOCKS server has started listening on a new UDP port for UDP relaying.
+client.on('established', info => {
+  console.log(info);
+  /*
+  {
+    socket: <Socket ...>,
+    remoteHost: { // This is the remote port on the SOCKS proxy server to send UDP frame packets to.
+      host: '104.131.124.203',
+      port: 58232
+    }
+  }
+  */
+
+  // Send a udp frame to 8.8.8.8 on port 53 through the proxy.
+  const packet = SocksClient.createUDPFrame({
+    remoteHost: { host: '8.8.8.8', port: 53 },
+    data: Buffer.from('hello') // A DNS lookup in the real world.
+  });
+
+  // Send packet.
+  udpSocket.send(packet, info.remoteHost.port, info.remoteHost.host);
+});
+
+// SOCKS proxy failed to bind.
+client.on('error', () => {
+  // Handle errors
+});
+
+// Start connection
+client.connect();
+```
diff --git a/mqtt-backend/node_modules/socks/docs/examples/typescript/bindExample.md b/mqtt-backend/node_modules/socks/docs/examples/typescript/bindExample.md
new file mode 100644
index 0000000..6b7607d
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/docs/examples/typescript/bindExample.md
@@ -0,0 +1,86 @@
+# socks examples
+
+## Example for SOCKS 'bind' command
+
+The bind command tells the SOCKS proxy server to bind and listen on a new TCP port for an incoming connection. It communicates the newly opened port back to the origin client. Once a incoming connection is accepted by the SOCKS proxy server it then communicates the remote host that connected to the SOCKS proxy back through the same initial connection via the origin client.
+
+This can be used for things such as FTP clients which require incoming TCP connections, etc.
+
+**Connection Steps**
+
+1. Client -(bind)-> Proxy    (Tells the proxy to bind to a new port)
+2. Client <-(port)- Proxy    (Tells the origin client which port it opened)
+3. Client2 --> Proxy    (Other client connects to the proxy on this port)
+4. Client <--(client2's host info)  (Proxy tells the origin client who connected to it)
+5. Original connection to the proxy is now a full TCP stream between client (you) and client2.
+6. Client <--> Proxy <--> Client2
+
+
+## Usage
+
+The 'bind' command can only be used by creating a new SocksClient instance and listening for 'bound' and 'established' events.
+
+
+```typescript
+import { SocksClient, SocksClientOptions } from 'socks';
+
+const options: SocksClientOptions = {
+  proxy: {
+    host: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  // This should be the ip and port of the expected client that will connect to the SOCKS proxy server on the newly bound port.
+  // Most SOCKS servers accept 0.0.0.0 as a wildcard address to accept any client.
+  destination: {
+    host: '0.0.0.0',
+    port: 0
+  },
+
+  command: 'bind'
+};
+
+const client = new SocksClient(options);
+
+// This event is fired when the SOCKS server has started listening on a new port for incoming connections.
+client.on('bound', (info) => {
+  console.log(info);
+  /*
+  {
+    socket: <Socket ...>,
+    remoteHost: { // This is the remote ip and port of the SOCKS proxy that is now accepting incoming connections.
+      host: '104.131.124.203',
+      port: 49928
+    }
+  }
+  */
+});
+
+// This event is fired when the SOCKS server has accepted an incoming connection on the newly bound port.
+client.on('established', (info) => {
+  console.log(info);
+  /*
+  {
+    socket: <Socket ...>,
+    remoteHost: { // This is the remote ip and port that connected to the SOCKS proxy on the newly bound port.
+      host: '1.2.3.4',
+      port: 58232
+    }
+  }
+  */
+
+  // At this point info.socket is a regular net.Socket TCP connection between client and client2 (1.2.3.4) (the client which connected to the proxy on the newly bound port.)
+
+  console.log(info.socket);
+  // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy servers)
+});
+
+// SOCKS proxy failed to bind.
+client.on('error', () => {
+  // Handle errors
+});
+
+// Start connection
+client.connect();
+```
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/socks/docs/examples/typescript/connectExample.md b/mqtt-backend/node_modules/socks/docs/examples/typescript/connectExample.md
new file mode 100644
index 0000000..30606d0
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/docs/examples/typescript/connectExample.md
@@ -0,0 +1,265 @@
+# socks examples
+
+## Example for SOCKS 'connect' command
+
+The connect command is the most common use-case for a SOCKS proxy. This establishes a direct connection to a destination host through a proxy server. The destination host only has knowledge of the proxy server connecting to it and does not know about the origin client (you).
+
+**Origin Client (you) <-> Proxy Server <-> Destination Server**
+
+In this example, we are connecting to a web server on port 80, and sending a very basic HTTP request to receive a response. It's worth noting that there are many socks-http-agents that can be used with the node http module (and libraries such as request.js) to make this easier. This HTTP request is used as a simple example.
+
+The 'connect' command can be used via the SocksClient.createConnection() factory function as well as by creating a SocksClient instance and using event handlers.
+
+### Using createConnection with async/await
+
+Since SocksClient.createConnection returns a Promise, we can easily use async/await for flow control.
+
+```typescript
+import { SocksClient, SocksClientOptions } from 'socks';
+
+const options: SocksClientOptions = {
+  proxy: {
+    host: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  destination: {
+    host: 'ip-api.com', // host names are supported with SOCKS v4a and SOCKS v5.
+    port: 80
+  },
+
+  command: 'connect'
+};
+
+async function start() {
+  try {
+    const info = await SocksClient.createConnection(options);
+
+    console.log(info.socket);
+    // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy servers)
+
+    info.socket.write('GET /json HTTP/1.1\nHost: ip-api.com\n\n');
+    info.socket.on('data', (data) => {
+      console.log(data.toString()); // ip-api.com sees that the last proxy (104.131.124.203) is connected to it and not the origin client (you).
+      /*
+        HTTP/1.1 200 OK
+        Access-Control-Allow-Origin: *
+        Content-Type: application/json; charset=utf-8
+        Date: Sun, 24 Dec 2017 03:47:51 GMT
+        Content-Length: 300
+
+        {
+          "as":"AS14061 Digital Ocean, Inc.",
+          "city":"Clifton",
+          "country":"United States",
+          "countryCode":"US",
+          "isp":"Digital Ocean",
+          "lat":40.8326,
+          "lon":-74.1307,
+          "org":"Digital Ocean",
+          "query":"104.131.124.203",
+          "region":"NJ",
+          "regionName":"New Jersey",
+          "status":"success",
+          "timezone":"America/New_York",
+          "zip":"07014"
+        }
+      */
+    });
+  } catch (err) {
+    // Handle errors
+  }
+}
+
+start();
+```
+
+### Using createConnection with Promises
+
+```typescript
+import { SocksClient, SocksClientOptions } from 'socks';
+
+const options: SocksClientOptions = {
+  proxy: {
+    ipaddress: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  destination: {
+    host: 'ip-api.com', // host names are supported with SOCKS v4a and SOCKS v5.
+    port: 80
+  },
+
+  command: 'connect'
+};
+
+SocksClient.createConnection(options)
+.then(info => {
+  console.log(info.socket);
+  // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy servers)
+
+  info.socket.write('GET /json HTTP/1.1\nHost: ip-api.com\n\n');
+  info.socket.on('data', (data) => {
+    console.log(data.toString()); // ip-api.com sees that the last proxy (104.131.124.203) is connected to it and not the origin client (you).
+    /*
+      HTTP/1.1 200 OK
+      Access-Control-Allow-Origin: *
+      Content-Type: application/json; charset=utf-8
+      Date: Sun, 24 Dec 2017 03:47:51 GMT
+      Content-Length: 300
+
+      {
+        "as":"AS14061 Digital Ocean, Inc.",
+        "city":"Clifton",
+        "country":"United States",
+        "countryCode":"US",
+        "isp":"Digital Ocean",
+        "lat":40.8326,
+        "lon":-74.1307,
+        "org":"Digital Ocean",
+        "query":"104.131.124.203",
+        "region":"NJ",
+        "regionName":"New Jersey",
+        "status":"success",
+        "timezone":"America/New_York",
+        "zip":"07014"
+      }
+    */
+  });
+})
+.catch(err => {
+  // handle errors
+});
+```
+
+### Using createConnection with callbacks
+
+SocksClient.createConnection() optionally accepts a callback function as a second parameter.
+
+**Note:** If a callback function is provided, a Promise is still returned from the function, but the promise will always resolve regardless of if there was en error. (tldr: Do not mix callbacks and Promises).
+
+```typescript
+import { SocksClient, SocksClientOptions } from 'socks';
+
+const options: SocksClientOptions = {
+  proxy: {
+    ipaddress: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  destination: {
+    host: 'ip-api.com', // host names are supported with SOCKS v4a and SOCKS v5.
+    port: 80
+  },
+
+  command: 'connect'
+};
+
+SocksClient.createConnection(options, (err, info) => {
+  if (err) {
+    // handle errors
+  } else {
+    console.log(info.socket);
+    // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy servers)
+
+    info.socket.write('GET /json HTTP/1.1\nHost: ip-api.com\n\n');
+    info.socket.on('data', (data) => {
+      console.log(data.toString()); // ip-api.com sees that the last proxy (104.131.124.203) is connected to it and not the origin client (you).
+      /*
+        HTTP/1.1 200 OK
+        Access-Control-Allow-Origin: *
+        Content-Type: application/json; charset=utf-8
+        Date: Sun, 24 Dec 2017 03:47:51 GMT
+        Content-Length: 300
+
+        {
+          "as":"AS14061 Digital Ocean, Inc.",
+          "city":"Clifton",
+          "country":"United States",
+          "countryCode":"US",
+          "isp":"Digital Ocean",
+          "lat":40.8326,
+          "lon":-74.1307,
+          "org":"Digital Ocean",
+          "query":"104.131.124.203",
+          "region":"NJ",
+          "regionName":"New Jersey",
+          "status":"success",
+          "timezone":"America/New_York",
+          "zip":"07014"
+        }
+      */
+    });
+  }
+})
+```
+
+### Using event handlers
+
+SocksClient also supports instance creation of a SocksClient. This allows for event based flow control.
+
+```typescript
+import { SocksClient, SocksClientOptions } from 'socks';
+
+const options: SocksClientOptions = {
+  proxy: {
+    ipaddress: '104.131.124.203',
+    port: 1081,
+    type: 5
+  },
+
+  destination: {
+    host: 'ip-api.com', // host names are supported with SOCKS v4a and SOCKS v5.
+    port: 80
+  },
+
+  command: 'connect'
+};
+
+const client = new SocksClient(options);
+
+client.on('established', (info) => {
+  console.log(info.socket);
+  // <Socket ...>  (this is a raw net.Socket that is established to the destination host through the given proxy servers)
+
+  info.socket.write('GET /json HTTP/1.1\nHost: ip-api.com\n\n');
+  info.socket.on('data', (data) => {
+    console.log(data.toString()); // ip-api.com sees that the last proxy (104.131.124.203) is connected to it and not the origin client (you).
+    /*
+      HTTP/1.1 200 OK
+      Access-Control-Allow-Origin: *
+      Content-Type: application/json; charset=utf-8
+      Date: Sun, 24 Dec 2017 03:47:51 GMT
+      Content-Length: 300
+
+      {
+        "as":"AS14061 Digital Ocean, Inc.",
+        "city":"Clifton",
+        "country":"United States",
+        "countryCode":"US",
+        "isp":"Digital Ocean",
+        "lat":40.8326,
+        "lon":-74.1307,
+        "org":"Digital Ocean",
+        "query":"104.131.124.203",
+        "region":"NJ",
+        "regionName":"New Jersey",
+        "status":"success",
+        "timezone":"America/New_York",
+        "zip":"07014"
+      }
+    */
+  });
+});
+
+// Failed to establish proxy connection to destination.
+client.on('error', () => {
+  // Handle errors
+});
+
+// Start connection
+client.connect();
+```
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/socks/docs/index.md b/mqtt-backend/node_modules/socks/docs/index.md
new file mode 100644
index 0000000..3eb1d71
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/docs/index.md
@@ -0,0 +1,5 @@
+# Documentation
+
+- [API Reference](https://github.com/JoshGlazebrook/socks#api-reference)
+
+- [Code Examples](./examples/index.md)
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/socks/docs/migratingFromV1.md b/mqtt-backend/node_modules/socks/docs/migratingFromV1.md
new file mode 100644
index 0000000..dd00838
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/docs/migratingFromV1.md
@@ -0,0 +1,86 @@
+# socks
+
+## Migrating from v1
+
+For the most part, migrating from v1 takes minimal effort as v2 still supports factory creation of proxy connections with callback support.
+
+### Notable breaking changes
+
+- In an options object, the proxy 'command' is now required and does not default to 'connect'.
+- **In an options object, 'target' is now known as 'destination'.**
+- Sockets are no longer paused after a SOCKS connection is made, so socket.resume() is no longer required. (Please be sure to attach data handlers immediately to the Socket to avoid losing data).
+- In v2, only the 'connect' command is supported via the factory SocksClient.createConnection function. (BIND and ASSOCIATE must be used with a SocksClient instance via event handlers).
+- In v2, the factory SocksClient.createConnection function callback is called with a single object rather than separate socket and info object.
+- A SOCKS http/https agent is no longer bundled into the library.
+
+For informational purposes, here is the original getting started example from v1 converted to work with v2.
+
+### Before (v1)
+
+```javascript
+var Socks = require('socks');
+
+var options = {
+    proxy: {
+        ipaddress: "202.101.228.108",
+        port: 1080,
+        type: 5
+    },
+    target: {
+        host: "google.com",
+        port: 80
+    },
+    command: 'connect'
+};
+
+Socks.createConnection(options, function(err, socket, info) {
+    if (err)
+        console.log(err);
+    else {
+        socket.write("GET / HTTP/1.1\nHost: google.com\n\n");
+        socket.on('data', function(data) {
+            console.log(data.length);
+            console.log(data);
+        });
+
+        // PLEASE NOTE: sockets need to be resumed before any data will come in or out as they are paused right before this callback is fired.
+        socket.resume();
+
+        // 569
+        // <Buffer 48 54 54 50 2f 31 2e 31 20 33 30 31 20 4d 6f 76 65 64 20 50 65...
+    }
+});
+```
+
+### After (v2)
+```javascript
+const SocksClient = require('socks').SocksClient;
+
+let options = {
+    proxy: {
+        ipaddress: "202.101.228.108",
+        port: 1080,
+        type: 5
+    },
+    destination: {
+        host: "google.com",
+        port: 80
+    },
+    command: 'connect'
+};
+
+SocksClient.createConnection(options, function(err, result) {
+    if (err)
+        console.log(err);
+    else {
+        result.socket.write("GET / HTTP/1.1\nHost: google.com\n\n");
+        result.socket.on('data', function(data) {
+            console.log(data.length);
+            console.log(data);
+        });
+
+        // 569
+        // <Buffer 48 54 54 50 2f 31 2e 31 20 33 30 31 20 4d 6f 76 65 64 20 50 65...
+    }
+});
+```
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/socks/package.json b/mqtt-backend/node_modules/socks/package.json
new file mode 100644
index 0000000..bcda02b
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/package.json
@@ -0,0 +1,58 @@
+{
+  "name": "socks",
+  "private": false,
+  "version": "2.8.8",
+  "description": "Fully featured SOCKS proxy client supporting SOCKSv4, SOCKSv4a, and SOCKSv5. Includes Bind and Associate functionality.",
+  "main": "build/index.js",
+  "typings": "typings/index.d.ts",
+  "homepage": "https://github.com/JoshGlazebrook/socks/",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/JoshGlazebrook/socks.git"
+  },
+  "bugs": {
+    "url": "https://github.com/JoshGlazebrook/socks/issues"
+  },
+  "keywords": [
+    "socks",
+    "proxy",
+    "tor",
+    "socks 4",
+    "socks 5",
+    "socks4",
+    "socks5"
+  ],
+  "engines": {
+    "node": ">= 10.0.0",
+    "npm": ">= 3.0.0"
+  },
+  "author": "Josh Glazebrook",
+  "contributors": [
+    "castorw"
+  ],
+  "license": "MIT",
+  "readmeFilename": "README.md",
+  "devDependencies": {
+    "@types/mocha": "^10.0.6",
+    "@types/node": "^20.11.17",
+    "@typescript-eslint/eslint-plugin": "^6.21.0",
+    "@typescript-eslint/parser": "^6.21.0",
+    "eslint": "^8.20.0",
+    "mocha": "^10.0.0",
+    "prettier": "^3.2.5",
+    "ts-node": "^10.9.1",
+    "typescript": "^5.3.3"
+  },
+  "dependencies": {
+    "ip-address": "^10.1.1",
+    "smart-buffer": "^4.2.0"
+  },
+  "scripts": {
+    "prepublish": "npm install -g typescript && npm run build",
+    "test": "NODE_ENV=test mocha --recursive --require ts-node/register test/**/*.ts",
+    "prettier": "prettier --write ./src/**/*.ts --config .prettierrc.yaml",
+    "lint": "eslint 'src/**/*.ts'",
+    "build": "rm -rf build typings && prettier --write ./src/**/*.ts --config .prettierrc.yaml && tsc -p .",
+    "build-raw": "rm -rf build typings && tsc -p ."
+  }
+}
diff --git a/mqtt-backend/node_modules/socks/typings/client/socksclient.d.ts b/mqtt-backend/node_modules/socks/typings/client/socksclient.d.ts
new file mode 100644
index 0000000..b886d95
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/typings/client/socksclient.d.ts
@@ -0,0 +1,162 @@
+/// <reference types="node" />
+/// <reference types="node" />
+/// <reference types="node" />
+import { EventEmitter } from 'events';
+import { SocksClientOptions, SocksClientChainOptions, SocksRemoteHost, SocksProxy, SocksClientBoundEvent, SocksClientEstablishedEvent, SocksUDPFrameDetails } from '../common/constants';
+import { SocksClientError } from '../common/util';
+import { Duplex } from 'stream';
+declare interface SocksClient {
+    on(event: 'error', listener: (err: SocksClientError) => void): this;
+    on(event: 'bound', listener: (info: SocksClientBoundEvent) => void): this;
+    on(event: 'established', listener: (info: SocksClientEstablishedEvent) => void): this;
+    once(event: string, listener: (...args: unknown[]) => void): this;
+    once(event: 'error', listener: (err: SocksClientError) => void): this;
+    once(event: 'bound', listener: (info: SocksClientBoundEvent) => void): this;
+    once(event: 'established', listener: (info: SocksClientEstablishedEvent) => void): this;
+    emit(event: string | symbol, ...args: unknown[]): boolean;
+    emit(event: 'error', err: SocksClientError): boolean;
+    emit(event: 'bound', info: SocksClientBoundEvent): boolean;
+    emit(event: 'established', info: SocksClientEstablishedEvent): boolean;
+}
+declare class SocksClient extends EventEmitter implements SocksClient {
+    private options;
+    private socket;
+    private state;
+    private receiveBuffer;
+    private nextRequiredPacketBufferSize;
+    private socks5ChosenAuthType;
+    private onDataReceived;
+    private onClose;
+    private onError;
+    private onConnect;
+    constructor(options: SocksClientOptions);
+    /**
+     * Creates a new SOCKS connection.
+     *
+     * Note: Supports callbacks and promises. Only supports the connect command.
+     * @param options { SocksClientOptions } Options.
+     * @param callback { Function } An optional callback function.
+     * @returns { Promise }
+     */
+    static createConnection(options: SocksClientOptions, callback?: (error: Error | null, info?: SocksClientEstablishedEvent) => void): Promise<SocksClientEstablishedEvent>;
+    /**
+     * Creates a new SOCKS connection chain to a destination host through 2 or more SOCKS proxies.
+     *
+     * Note: Supports callbacks and promises. Only supports the connect method.
+     * Note: Implemented via createConnection() factory function.
+     * @param options { SocksClientChainOptions } Options
+     * @param callback { Function } An optional callback function.
+     * @returns { Promise }
+     */
+    static createConnectionChain(options: SocksClientChainOptions, callback?: (error: Error | null, socket?: SocksClientEstablishedEvent) => void): Promise<SocksClientEstablishedEvent>;
+    /**
+     * Creates a SOCKS UDP Frame.
+     * @param options
+     */
+    static createUDPFrame(options: SocksUDPFrameDetails): Buffer;
+    /**
+     * Parses a SOCKS UDP frame.
+     * @param data
+     */
+    static parseUDPFrame(data: Buffer): SocksUDPFrameDetails;
+    /**
+     * Internal state setter. If the SocksClient is in an error state, it cannot be changed to a non error state.
+     */
+    private setState;
+    /**
+     * Starts the connection establishment to the proxy and destination.
+     * @param existingSocket Connected socket to use instead of creating a new one (internal use).
+     */
+    connect(existingSocket?: Duplex): void;
+    private getSocketOptions;
+    /**
+     * Handles internal Socks timeout callback.
+     * Note: If the Socks client is not BoundWaitingForConnection or Established, the connection will be closed.
+     */
+    private onEstablishedTimeout;
+    /**
+     * Handles Socket connect event.
+     */
+    private onConnectHandler;
+    /**
+     * Handles Socket data event.
+     * @param data
+     */
+    private onDataReceivedHandler;
+    /**
+     * Handles processing of the data we have received.
+     */
+    private processData;
+    /**
+     * Handles Socket close event.
+     * @param had_error
+     */
+    private onCloseHandler;
+    /**
+     * Handles Socket error event.
+     * @param err
+     */
+    private onErrorHandler;
+    /**
+     * Removes internal event listeners on the underlying Socket.
+     */
+    private removeInternalSocketHandlers;
+    /**
+     * Closes and destroys the underlying Socket. Emits an error event.
+     * @param err { String } An error string to include in error event.
+     */
+    private closeSocket;
+    /**
+     * Sends initial Socks v4 handshake request.
+     */
+    private sendSocks4InitialHandshake;
+    /**
+     * Handles Socks v4 handshake response.
+     * @param data
+     */
+    private handleSocks4FinalHandshakeResponse;
+    /**
+     * Handles Socks v4 incoming connection request (BIND)
+     * @param data
+     */
+    private handleSocks4IncomingConnectionResponse;
+    /**
+     * Sends initial Socks v5 handshake request.
+     */
+    private sendSocks5InitialHandshake;
+    /**
+     * Handles initial Socks v5 handshake response.
+     * @param data
+     */
+    private handleInitialSocks5HandshakeResponse;
+    /**
+     * Sends Socks v5 user & password auth handshake.
+     *
+     * Note: No auth and user/pass are currently supported.
+     */
+    private sendSocks5UserPassAuthentication;
+    private sendSocks5CustomAuthentication;
+    private handleSocks5CustomAuthHandshakeResponse;
+    private handleSocks5AuthenticationNoAuthHandshakeResponse;
+    private handleSocks5AuthenticationUserPassHandshakeResponse;
+    /**
+     * Handles Socks v5 auth handshake response.
+     * @param data
+     */
+    private handleInitialSocks5AuthenticationHandshakeResponse;
+    /**
+     * Sends Socks v5 final handshake request.
+     */
+    private sendSocks5CommandRequest;
+    /**
+     * Handles Socks v5 final handshake response.
+     * @param data
+     */
+    private handleSocks5FinalHandshakeResponse;
+    /**
+     * Handles Socks v5 incoming connection request (BIND).
+     */
+    private handleSocks5IncomingConnectionResponse;
+    get socksClientOptions(): SocksClientOptions;
+}
+export { SocksClient, SocksClientOptions, SocksClientChainOptions, SocksClientError, SocksRemoteHost, SocksProxy, SocksUDPFrameDetails, };
diff --git a/mqtt-backend/node_modules/socks/typings/common/constants.d.ts b/mqtt-backend/node_modules/socks/typings/common/constants.d.ts
new file mode 100644
index 0000000..475dee3
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/typings/common/constants.d.ts
@@ -0,0 +1,151 @@
+/// <reference types="node" />
+/// <reference types="node" />
+/// <reference types="node" />
+import { Duplex } from 'stream';
+import { Socket, SocketConnectOpts } from 'net';
+declare const DEFAULT_TIMEOUT = 30000;
+type SocksProxyType = 4 | 5;
+declare const ERRORS: {
+    InvalidSocksCommand: string;
+    InvalidSocksCommandForOperation: string;
+    InvalidSocksCommandChain: string;
+    InvalidSocksClientOptionsDestination: string;
+    InvalidSocksClientOptionsExistingSocket: string;
+    InvalidSocksClientOptionsProxy: string;
+    InvalidSocksClientOptionsTimeout: string;
+    InvalidSocksClientOptionsProxiesLength: string;
+    InvalidSocksClientOptionsCustomAuthRange: string;
+    InvalidSocksClientOptionsCustomAuthOptions: string;
+    NegotiationError: string;
+    SocketClosed: string;
+    ProxyConnectionTimedOut: string;
+    InternalError: string;
+    InvalidSocks4HandshakeResponse: string;
+    Socks4ProxyRejectedConnection: string;
+    InvalidSocks4IncomingConnectionResponse: string;
+    Socks4ProxyRejectedIncomingBoundConnection: string;
+    InvalidSocks5InitialHandshakeResponse: string;
+    InvalidSocks5IntiailHandshakeSocksVersion: string;
+    InvalidSocks5InitialHandshakeNoAcceptedAuthType: string;
+    InvalidSocks5InitialHandshakeUnknownAuthType: string;
+    Socks5AuthenticationFailed: string;
+    InvalidSocks5FinalHandshake: string;
+    InvalidSocks5FinalHandshakeRejected: string;
+    InvalidSocks5IncomingConnectionResponse: string;
+    Socks5ProxyRejectedIncomingBoundConnection: string;
+};
+declare const SOCKS_INCOMING_PACKET_SIZES: {
+    Socks5InitialHandshakeResponse: number;
+    Socks5UserPassAuthenticationResponse: number;
+    Socks5ResponseHeader: number;
+    Socks5ResponseIPv4: number;
+    Socks5ResponseIPv6: number;
+    Socks5ResponseHostname: (hostNameLength: number) => number;
+    Socks4Response: number;
+};
+type SocksCommandOption = 'connect' | 'bind' | 'associate';
+declare enum SocksCommand {
+    connect = 1,
+    bind = 2,
+    associate = 3
+}
+declare enum Socks4Response {
+    Granted = 90,
+    Failed = 91,
+    Rejected = 92,
+    RejectedIdent = 93
+}
+declare enum Socks5Auth {
+    NoAuth = 0,
+    GSSApi = 1,
+    UserPass = 2
+}
+declare const SOCKS5_CUSTOM_AUTH_START = 128;
+declare const SOCKS5_CUSTOM_AUTH_END = 254;
+declare const SOCKS5_NO_ACCEPTABLE_AUTH = 255;
+declare enum Socks5Response {
+    Granted = 0,
+    Failure = 1,
+    NotAllowed = 2,
+    NetworkUnreachable = 3,
+    HostUnreachable = 4,
+    ConnectionRefused = 5,
+    TTLExpired = 6,
+    CommandNotSupported = 7,
+    AddressNotSupported = 8
+}
+declare enum Socks5HostType {
+    IPv4 = 1,
+    Hostname = 3,
+    IPv6 = 4
+}
+declare enum SocksClientState {
+    Created = 0,
+    Connecting = 1,
+    Connected = 2,
+    SentInitialHandshake = 3,
+    ReceivedInitialHandshakeResponse = 4,
+    SentAuthentication = 5,
+    ReceivedAuthenticationResponse = 6,
+    SentFinalHandshake = 7,
+    ReceivedFinalResponse = 8,
+    BoundWaitingForConnection = 9,
+    Established = 10,
+    Disconnected = 11,
+    Error = 99
+}
+/**
+ * Represents a SocksProxy
+ */
+interface SocksProxy {
+    ipaddress?: string;
+    host?: string;
+    port: number;
+    type: SocksProxyType;
+    userId?: string;
+    password?: string;
+    custom_auth_method?: number;
+    custom_auth_request_handler?: () => Promise<Buffer>;
+    custom_auth_response_size?: number;
+    custom_auth_response_handler?: (data: Buffer) => Promise<boolean>;
+}
+/**
+ * Represents a remote host
+ */
+interface SocksRemoteHost {
+    host: string;
+    port: number;
+}
+/**
+ * SocksClient connection options.
+ */
+interface SocksClientOptions {
+    command: SocksCommandOption;
+    destination: SocksRemoteHost;
+    proxy: SocksProxy;
+    timeout?: number;
+    existing_socket?: Duplex;
+    set_tcp_nodelay?: boolean;
+    socket_options?: SocketConnectOpts;
+}
+/**
+ * SocksClient chain connection options.
+ */
+interface SocksClientChainOptions {
+    command: 'connect';
+    destination: SocksRemoteHost;
+    proxies: SocksProxy[];
+    timeout?: number;
+    randomizeChain?: false;
+}
+interface SocksClientEstablishedEvent {
+    socket: Socket;
+    remoteHost?: SocksRemoteHost;
+}
+type SocksClientBoundEvent = SocksClientEstablishedEvent;
+interface SocksUDPFrameDetails {
+    frameNumber?: number;
+    remoteHost: SocksRemoteHost;
+    data: Buffer;
+}
+export { DEFAULT_TIMEOUT, ERRORS, SocksProxyType, SocksCommand, Socks4Response, Socks5Auth, Socks5HostType, Socks5Response, SocksClientState, SocksProxy, SocksRemoteHost, SocksCommandOption, SocksClientOptions, SocksClientChainOptions, SocksClientEstablishedEvent, SocksClientBoundEvent, SocksUDPFrameDetails, SOCKS_INCOMING_PACKET_SIZES, SOCKS5_CUSTOM_AUTH_START, SOCKS5_CUSTOM_AUTH_END, SOCKS5_NO_ACCEPTABLE_AUTH, };
diff --git a/mqtt-backend/node_modules/socks/typings/common/helpers.d.ts b/mqtt-backend/node_modules/socks/typings/common/helpers.d.ts
new file mode 100644
index 0000000..5bad9fe
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/typings/common/helpers.d.ts
@@ -0,0 +1,17 @@
+/// <reference types="node" />
+import { SocksClientOptions, SocksClientChainOptions } from '../client/socksclient';
+/**
+ * Validates the provided SocksClientOptions
+ * @param options { SocksClientOptions }
+ * @param acceptedCommands { string[] } A list of accepted SocksProxy commands.
+ */
+declare function validateSocksClientOptions(options: SocksClientOptions, acceptedCommands?: string[]): void;
+/**
+ * Validates the SocksClientChainOptions
+ * @param options { SocksClientChainOptions }
+ */
+declare function validateSocksClientChainOptions(options: SocksClientChainOptions): void;
+export { validateSocksClientOptions, validateSocksClientChainOptions };
+export declare function ipv4ToInt32(ip: string): number;
+export declare function int32ToIpv4(int32: number): string;
+export declare function ipToBuffer(ip: string): Buffer;
diff --git a/mqtt-backend/node_modules/socks/typings/common/receivebuffer.d.ts b/mqtt-backend/node_modules/socks/typings/common/receivebuffer.d.ts
new file mode 100644
index 0000000..756e98b
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/typings/common/receivebuffer.d.ts
@@ -0,0 +1,12 @@
+/// <reference types="node" />
+declare class ReceiveBuffer {
+    private buffer;
+    private offset;
+    private originalSize;
+    constructor(size?: number);
+    get length(): number;
+    append(data: Buffer): number;
+    peek(length: number): Buffer;
+    get(length: number): Buffer;
+}
+export { ReceiveBuffer };
diff --git a/mqtt-backend/node_modules/socks/typings/common/util.d.ts b/mqtt-backend/node_modules/socks/typings/common/util.d.ts
new file mode 100644
index 0000000..8612026
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/typings/common/util.d.ts
@@ -0,0 +1,14 @@
+import { SocksClientOptions, SocksClientChainOptions } from './constants';
+/**
+ * Error wrapper for SocksClient
+ */
+declare class SocksClientError extends Error {
+    options: SocksClientOptions | SocksClientChainOptions;
+    constructor(message: string, options: SocksClientOptions | SocksClientChainOptions);
+}
+/**
+ * Shuffles a given array.
+ * @param array The array to shuffle.
+ */
+declare function shuffleArray(array: unknown[]): void;
+export { SocksClientError, shuffleArray };
diff --git a/mqtt-backend/node_modules/socks/typings/index.d.ts b/mqtt-backend/node_modules/socks/typings/index.d.ts
new file mode 100644
index 0000000..fbf9006
--- /dev/null
+++ b/mqtt-backend/node_modules/socks/typings/index.d.ts
@@ -0,0 +1 @@
+export * from './client/socksclient';
diff --git a/mqtt-backend/node_modules/split2/LICENSE b/mqtt-backend/node_modules/split2/LICENSE
new file mode 100644
index 0000000..a91afe5
--- /dev/null
+++ b/mqtt-backend/node_modules/split2/LICENSE
@@ -0,0 +1,13 @@
+Copyright (c) 2014-2018, Matteo Collina <hello@matteocollina.com>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/mqtt-backend/node_modules/split2/README.md b/mqtt-backend/node_modules/split2/README.md
new file mode 100644
index 0000000..36f03ab
--- /dev/null
+++ b/mqtt-backend/node_modules/split2/README.md
@@ -0,0 +1,85 @@
+# Split2(matcher, mapper, options)
+
+![ci](https://github.com/mcollina/split2/workflows/ci/badge.svg)
+
+Break up a stream and reassemble it so that each line is a chunk.
+`split2` is inspired by [@dominictarr](https://github.com/dominictarr) [`split`](https://github.com/dominictarr/split) module,
+and it is totally API compatible with it.
+However, it is based on Node.js core [`Transform`](https://nodejs.org/api/stream.html#stream_new_stream_transform_options).
+
+`matcher` may be a `String`, or a `RegExp`. Example, read every line in a file ...
+
+``` js
+  fs.createReadStream(file)
+    .pipe(split2())
+    .on('data', function (line) {
+      //each chunk now is a separate line!
+    })
+
+```
+
+`split` takes the same arguments as `string.split` except it defaults to '/\r?\n/', and the optional `limit` paremeter is ignored.
+[String#split](https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/String/split)
+
+`split` takes an optional options object on it's third argument, which
+is directly passed as a
+[Transform](https://nodejs.org/api/stream.html#stream_new_stream_transform_options)
+option.
+
+Additionally, the `.maxLength` and `.skipOverflow` options are implemented, which set limits on the internal
+buffer size and the stream's behavior when the limit is exceeded. There is no limit unless `maxLength` is set. When
+the internal buffer size exceeds `maxLength`, the stream emits an error by default. You may also set `skipOverflow` to
+true to suppress the error and instead skip past any lines that cause the internal buffer to exceed `maxLength`.
+
+Calling `.destroy` will make the stream emit `close`. Use this to perform cleanup logic
+
+``` js
+var splitFile = function(filename) {
+  var file = fs.createReadStream(filename)
+
+  return file
+    .pipe(split2())
+    .on('close', function() {
+      // destroy the file stream in case the split stream was destroyed
+      file.destroy()
+    })
+}
+
+var stream = splitFile('my-file.txt')
+
+stream.destroy() // will destroy the input file stream
+```
+
+# NDJ - Newline Delimited Json
+
+`split2` accepts a function which transforms each line.
+
+``` js
+fs.createReadStream(file)
+  .pipe(split2(JSON.parse))
+  .on('data', function (obj) {
+    //each chunk now is a js object
+  })
+  .on("error", function(error) {
+    //handling parsing errors
+  })
+```
+
+However, in [@dominictarr](https://github.com/dominictarr) [`split`](https://github.com/dominictarr/split) the mapper
+is wrapped in a try-catch, while here it is not: if your parsing logic can throw, wrap it yourself. Otherwise, you can also use the stream error handling when mapper function throw.
+
+# License
+
+Copyright (c) 2014-2021, Matteo Collina <hello@matteocollina.com>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/mqtt-backend/node_modules/split2/bench.js b/mqtt-backend/node_modules/split2/bench.js
new file mode 100644
index 0000000..15ec5df
--- /dev/null
+++ b/mqtt-backend/node_modules/split2/bench.js
@@ -0,0 +1,27 @@
+'use strict'
+
+const split = require('./')
+const bench = require('fastbench')
+const binarySplit = require('binary-split')
+const fs = require('fs')
+
+function benchSplit (cb) {
+  fs.createReadStream('package.json')
+    .pipe(split())
+    .on('end', cb)
+    .resume()
+}
+
+function benchBinarySplit (cb) {
+  fs.createReadStream('package.json')
+    .pipe(binarySplit())
+    .on('end', cb)
+    .resume()
+}
+
+const run = bench([
+  benchSplit,
+  benchBinarySplit
+], 10000)
+
+run(run)
diff --git a/mqtt-backend/node_modules/split2/index.js b/mqtt-backend/node_modules/split2/index.js
new file mode 100644
index 0000000..9b59f6c
--- /dev/null
+++ b/mqtt-backend/node_modules/split2/index.js
@@ -0,0 +1,141 @@
+/*
+Copyright (c) 2014-2021, Matteo Collina <hello@matteocollina.com>
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+'use strict'
+
+const { Transform } = require('stream')
+const { StringDecoder } = require('string_decoder')
+const kLast = Symbol('last')
+const kDecoder = Symbol('decoder')
+
+function transform (chunk, enc, cb) {
+  let list
+  if (this.overflow) { // Line buffer is full. Skip to start of next line.
+    const buf = this[kDecoder].write(chunk)
+    list = buf.split(this.matcher)
+
+    if (list.length === 1) return cb() // Line ending not found. Discard entire chunk.
+
+    // Line ending found. Discard trailing fragment of previous line and reset overflow state.
+    list.shift()
+    this.overflow = false
+  } else {
+    this[kLast] += this[kDecoder].write(chunk)
+    list = this[kLast].split(this.matcher)
+  }
+
+  this[kLast] = list.pop()
+
+  for (let i = 0; i < list.length; i++) {
+    try {
+      push(this, this.mapper(list[i]))
+    } catch (error) {
+      return cb(error)
+    }
+  }
+
+  this.overflow = this[kLast].length > this.maxLength
+  if (this.overflow && !this.skipOverflow) {
+    cb(new Error('maximum buffer reached'))
+    return
+  }
+
+  cb()
+}
+
+function flush (cb) {
+  // forward any gibberish left in there
+  this[kLast] += this[kDecoder].end()
+
+  if (this[kLast]) {
+    try {
+      push(this, this.mapper(this[kLast]))
+    } catch (error) {
+      return cb(error)
+    }
+  }
+
+  cb()
+}
+
+function push (self, val) {
+  if (val !== undefined) {
+    self.push(val)
+  }
+}
+
+function noop (incoming) {
+  return incoming
+}
+
+function split (matcher, mapper, options) {
+  // Set defaults for any arguments not supplied.
+  matcher = matcher || /\r?\n/
+  mapper = mapper || noop
+  options = options || {}
+
+  // Test arguments explicitly.
+  switch (arguments.length) {
+    case 1:
+      // If mapper is only argument.
+      if (typeof matcher === 'function') {
+        mapper = matcher
+        matcher = /\r?\n/
+      // If options is only argument.
+      } else if (typeof matcher === 'object' && !(matcher instanceof RegExp) && !matcher[Symbol.split]) {
+        options = matcher
+        matcher = /\r?\n/
+      }
+      break
+
+    case 2:
+      // If mapper and options are arguments.
+      if (typeof matcher === 'function') {
+        options = mapper
+        mapper = matcher
+        matcher = /\r?\n/
+      // If matcher and options are arguments.
+      } else if (typeof mapper === 'object') {
+        options = mapper
+        mapper = noop
+      }
+  }
+
+  options = Object.assign({}, options)
+  options.autoDestroy = true
+  options.transform = transform
+  options.flush = flush
+  options.readableObjectMode = true
+
+  const stream = new Transform(options)
+
+  stream[kLast] = ''
+  stream[kDecoder] = new StringDecoder('utf8')
+  stream.matcher = matcher
+  stream.mapper = mapper
+  stream.maxLength = options.maxLength
+  stream.skipOverflow = options.skipOverflow || false
+  stream.overflow = false
+  stream._destroy = function (err, cb) {
+    // Weird Node v12 bug that we need to work around
+    this._writableState.errorEmitted = false
+    cb(err)
+  }
+
+  return stream
+}
+
+module.exports = split
diff --git a/mqtt-backend/node_modules/split2/package.json b/mqtt-backend/node_modules/split2/package.json
new file mode 100644
index 0000000..e04bcc8
--- /dev/null
+++ b/mqtt-backend/node_modules/split2/package.json
@@ -0,0 +1,39 @@
+{
+  "name": "split2",
+  "version": "4.2.0",
+  "description": "split a Text Stream into a Line Stream, using Stream 3",
+  "main": "index.js",
+  "scripts": {
+    "lint": "standard --verbose",
+    "unit": "nyc --lines 100 --branches 100 --functions 100 --check-coverage --reporter=text tape test.js",
+    "coverage": "nyc --reporter=html --reporter=cobertura --reporter=text tape test/test.js",
+    "test:report": "npm run lint && npm run unit:report",
+    "test": "npm run lint && npm run unit",
+    "legacy": "tape test.js"
+  },
+  "pre-commit": [
+    "test"
+  ],
+  "website": "https://github.com/mcollina/split2",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mcollina/split2.git"
+  },
+  "bugs": {
+    "url": "http://github.com/mcollina/split2/issues"
+  },
+  "engines": {
+    "node": ">= 10.x"
+  },
+  "author": "Matteo Collina <hello@matteocollina.com>",
+  "license": "ISC",
+  "devDependencies": {
+    "binary-split": "^1.0.3",
+    "callback-stream": "^1.1.0",
+    "fastbench": "^1.0.0",
+    "nyc": "^15.0.1",
+    "pre-commit": "^1.1.2",
+    "standard": "^17.0.0",
+    "tape": "^5.0.0"
+  }
+}
diff --git a/mqtt-backend/node_modules/split2/test.js b/mqtt-backend/node_modules/split2/test.js
new file mode 100644
index 0000000..a7f9838
--- /dev/null
+++ b/mqtt-backend/node_modules/split2/test.js
@@ -0,0 +1,409 @@
+'use strict'
+
+const test = require('tape')
+const split = require('./')
+const callback = require('callback-stream')
+const strcb = callback.bind(null, { decodeStrings: false })
+const objcb = callback.bind(null, { objectMode: true })
+
+test('split two lines on end', function (t) {
+  t.plan(2)
+
+  const input = split()
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['hello', 'world'])
+  }))
+
+  input.end('hello\nworld')
+})
+
+test('split two lines on two writes', function (t) {
+  t.plan(2)
+
+  const input = split()
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['hello', 'world'])
+  }))
+
+  input.write('hello')
+  input.write('\nworld')
+  input.end()
+})
+
+test('split four lines on three writes', function (t) {
+  t.plan(2)
+
+  const input = split()
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['hello', 'world', 'bye', 'world'])
+  }))
+
+  input.write('hello\nwor')
+  input.write('ld\nbye\nwo')
+  input.write('rld')
+  input.end()
+})
+
+test('accumulate multiple writes', function (t) {
+  t.plan(2)
+
+  const input = split()
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['helloworld'])
+  }))
+
+  input.write('hello')
+  input.write('world')
+  input.end()
+})
+
+test('split using a custom string matcher', function (t) {
+  t.plan(2)
+
+  const input = split('~')
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['hello', 'world'])
+  }))
+
+  input.end('hello~world')
+})
+
+test('split using a custom regexp matcher', function (t) {
+  t.plan(2)
+
+  const input = split(/~/)
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['hello', 'world'])
+  }))
+
+  input.end('hello~world')
+})
+
+test('support an option argument', function (t) {
+  t.plan(2)
+
+  const input = split({ highWaterMark: 2 })
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['hello', 'world'])
+  }))
+
+  input.end('hello\nworld')
+})
+
+test('support a mapper function', function (t) {
+  t.plan(2)
+
+  const a = { a: '42' }
+  const b = { b: '24' }
+
+  const input = split(JSON.parse)
+
+  input.pipe(objcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, [a, b])
+  }))
+
+  input.write(JSON.stringify(a))
+  input.write('\n')
+  input.end(JSON.stringify(b))
+})
+
+test('split lines windows-style', function (t) {
+  t.plan(2)
+
+  const input = split()
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['hello', 'world'])
+  }))
+
+  input.end('hello\r\nworld')
+})
+
+test('splits a buffer', function (t) {
+  t.plan(2)
+
+  const input = split()
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['hello', 'world'])
+  }))
+
+  input.end(Buffer.from('hello\nworld'))
+})
+
+test('do not end on undefined', function (t) {
+  t.plan(2)
+
+  const input = split(function (line) { })
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, [])
+  }))
+
+  input.end(Buffer.from('hello\nworld'))
+})
+
+test('has destroy method', function (t) {
+  t.plan(1)
+
+  const input = split(function (line) { })
+
+  input.on('close', function () {
+    t.ok(true, 'close emitted')
+    t.end()
+  })
+
+  input.destroy()
+})
+
+test('support custom matcher and mapper', function (t) {
+  t.plan(4)
+
+  const a = { a: '42' }
+  const b = { b: '24' }
+  const input = split('~', JSON.parse)
+
+  t.equal(input.matcher, '~')
+  t.equal(typeof input.mapper, 'function')
+
+  input.pipe(objcb(function (err, list) {
+    t.notOk(err, 'no errors')
+    t.deepEqual(list, [a, b])
+  }))
+
+  input.write(JSON.stringify(a))
+  input.write('~')
+  input.end(JSON.stringify(b))
+})
+
+test('support custom matcher and options', function (t) {
+  t.plan(6)
+
+  const input = split('~', { highWaterMark: 1024 })
+
+  t.equal(input.matcher, '~')
+  t.equal(typeof input.mapper, 'function')
+  t.equal(input._readableState.highWaterMark, 1024)
+  t.equal(input._writableState.highWaterMark, 1024)
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['hello', 'world'])
+  }))
+
+  input.end('hello~world')
+})
+
+test('support mapper and options', function (t) {
+  t.plan(6)
+
+  const a = { a: '42' }
+  const b = { b: '24' }
+  const input = split(JSON.parse, { highWaterMark: 1024 })
+
+  t.ok(input.matcher instanceof RegExp, 'matcher is RegExp')
+  t.equal(typeof input.mapper, 'function')
+  t.equal(input._readableState.highWaterMark, 1024)
+  t.equal(input._writableState.highWaterMark, 1024)
+
+  input.pipe(objcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, [a, b])
+  }))
+
+  input.write(JSON.stringify(a))
+  input.write('\n')
+  input.end(JSON.stringify(b))
+})
+
+test('split utf8 chars', function (t) {
+  t.plan(2)
+
+  const input = split()
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['烫烫烫', '锟斤拷'])
+  }))
+
+  const buf = Buffer.from('烫烫烫\r\n锟斤拷', 'utf8')
+  for (let i = 0; i < buf.length; ++i) {
+    input.write(buf.slice(i, i + 1))
+  }
+  input.end()
+})
+
+test('split utf8 chars 2by2', function (t) {
+  t.plan(2)
+
+  const input = split()
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['烫烫烫', '烫烫烫'])
+  }))
+
+  const str = '烫烫烫\r\n烫烫烫'
+  const buf = Buffer.from(str, 'utf8')
+  for (let i = 0; i < buf.length; i += 2) {
+    input.write(buf.slice(i, i + 2))
+  }
+  input.end()
+})
+
+test('split lines when the \n comes at the end of a chunk', function (t) {
+  t.plan(2)
+
+  const input = split()
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['hello', 'world'])
+  }))
+
+  input.write('hello\n')
+  input.end('world')
+})
+
+test('truncated utf-8 char', function (t) {
+  t.plan(2)
+
+  const input = split()
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['烫' + Buffer.from('e7', 'hex').toString()])
+  }))
+
+  const str = '烫烫'
+  const buf = Buffer.from(str, 'utf8')
+
+  input.write(buf.slice(0, 3))
+  input.end(buf.slice(3, 4))
+})
+
+test('maximum buffer limit', function (t) {
+  t.plan(1)
+
+  const input = split({ maxLength: 2 })
+  input.on('error', function (err) {
+    t.ok(err)
+  })
+
+  input.resume()
+
+  input.write('hey')
+})
+
+test('readable highWaterMark', function (t) {
+  const input = split()
+  t.equal(input._readableState.highWaterMark, 16)
+  t.end()
+})
+
+test('maxLength < chunk size', function (t) {
+  t.plan(2)
+
+  const input = split({ maxLength: 2 })
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['a', 'b'])
+  }))
+
+  input.end('a\nb')
+})
+
+test('maximum buffer limit w/skip', function (t) {
+  t.plan(2)
+
+  const input = split({ maxLength: 2, skipOverflow: true })
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['a', 'b', 'c'])
+  }))
+
+  input.write('a\n123')
+  input.write('456')
+  input.write('789\nb\nc')
+  input.end()
+})
+
+test("don't modify the options object", function (t) {
+  t.plan(2)
+
+  const options = {}
+  const input = split(options)
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.same(options, {})
+  }))
+
+  input.end()
+})
+
+test('mapper throws flush', function (t) {
+  t.plan(1)
+  const error = new Error()
+  const input = split(function () {
+    throw error
+  })
+
+  input.on('error', (err, list) => {
+    t.same(err, error)
+  })
+  input.end('hello')
+})
+
+test('mapper throws on transform', function (t) {
+  t.plan(1)
+
+  const error = new Error()
+  const input = split(function (l) {
+    throw error
+  })
+
+  input.on('error', (err) => {
+    t.same(err, error)
+  })
+  input.write('a')
+  input.write('\n')
+  input.end('b')
+})
+
+test('supports Symbol.split', function (t) {
+  t.plan(2)
+
+  const input = split({
+    [Symbol.split] (str) {
+      return str.split('~')
+    }
+  })
+
+  input.pipe(strcb(function (err, list) {
+    t.error(err)
+    t.deepEqual(list, ['hello', 'world'])
+  }))
+
+  input.end('hello~world')
+})
diff --git a/mqtt-backend/node_modules/string_decoder/LICENSE b/mqtt-backend/node_modules/string_decoder/LICENSE
new file mode 100644
index 0000000..778edb2
--- /dev/null
+++ b/mqtt-backend/node_modules/string_decoder/LICENSE
@@ -0,0 +1,48 @@
+Node.js is licensed for use as follows:
+
+"""
+Copyright Node.js contributors. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+"""
+
+This license applies to parts of Node.js originating from the
+https://github.com/joyent/node repository:
+
+"""
+Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to
+deal in the Software without restriction, including without limitation the
+rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+sell copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+IN THE SOFTWARE.
+"""
+
diff --git a/mqtt-backend/node_modules/string_decoder/README.md b/mqtt-backend/node_modules/string_decoder/README.md
new file mode 100644
index 0000000..5fd5831
--- /dev/null
+++ b/mqtt-backend/node_modules/string_decoder/README.md
@@ -0,0 +1,47 @@
+# string_decoder
+
+***Node-core v8.9.4 string_decoder for userland***
+
+
+[![NPM](https://nodei.co/npm/string_decoder.png?downloads=true&downloadRank=true)](https://nodei.co/npm/string_decoder/)
+[![NPM](https://nodei.co/npm-dl/string_decoder.png?&months=6&height=3)](https://nodei.co/npm/string_decoder/)
+
+
+```bash
+npm install --save string_decoder
+```
+
+***Node-core string_decoder for userland***
+
+This package is a mirror of the string_decoder implementation in Node-core.
+
+Full documentation may be found on the [Node.js website](https://nodejs.org/dist/v8.9.4/docs/api/).
+
+As of version 1.0.0 **string_decoder** uses semantic versioning.
+
+## Previous versions
+
+Previous version numbers match the versions found in Node core, e.g. 0.10.24 matches Node 0.10.24, likewise 0.11.10 matches Node 0.11.10.
+
+## Update
+
+The *build/* directory contains a build script that will scrape the source from the [nodejs/node](https://github.com/nodejs/node) repo given a specific Node version.
+
+## Streams Working Group
+
+`string_decoder` is maintained by the Streams Working Group, which
+oversees the development and maintenance of the Streams API within
+Node.js. The responsibilities of the Streams Working Group include:
+
+* Addressing stream issues on the Node.js issue tracker.
+* Authoring and editing stream documentation within the Node.js project.
+* Reviewing changes to stream subclasses within the Node.js project.
+* Redirecting changes to streams from the Node.js project to this
+  project.
+* Assisting in the implementation of stream providers within Node.js.
+* Recommending versions of `readable-stream` to be included in Node.js.
+* Messaging about the future of streams to give the community advance
+  notice of changes.
+
+See [readable-stream](https://github.com/nodejs/readable-stream) for
+more details.
diff --git a/mqtt-backend/node_modules/string_decoder/lib/string_decoder.js b/mqtt-backend/node_modules/string_decoder/lib/string_decoder.js
new file mode 100644
index 0000000..2e89e63
--- /dev/null
+++ b/mqtt-backend/node_modules/string_decoder/lib/string_decoder.js
@@ -0,0 +1,296 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+'use strict';
+
+/*<replacement>*/
+
+var Buffer = require('safe-buffer').Buffer;
+/*</replacement>*/
+
+var isEncoding = Buffer.isEncoding || function (encoding) {
+  encoding = '' + encoding;
+  switch (encoding && encoding.toLowerCase()) {
+    case 'hex':case 'utf8':case 'utf-8':case 'ascii':case 'binary':case 'base64':case 'ucs2':case 'ucs-2':case 'utf16le':case 'utf-16le':case 'raw':
+      return true;
+    default:
+      return false;
+  }
+};
+
+function _normalizeEncoding(enc) {
+  if (!enc) return 'utf8';
+  var retried;
+  while (true) {
+    switch (enc) {
+      case 'utf8':
+      case 'utf-8':
+        return 'utf8';
+      case 'ucs2':
+      case 'ucs-2':
+      case 'utf16le':
+      case 'utf-16le':
+        return 'utf16le';
+      case 'latin1':
+      case 'binary':
+        return 'latin1';
+      case 'base64':
+      case 'ascii':
+      case 'hex':
+        return enc;
+      default:
+        if (retried) return; // undefined
+        enc = ('' + enc).toLowerCase();
+        retried = true;
+    }
+  }
+};
+
+// Do not cache `Buffer.isEncoding` when checking encoding names as some
+// modules monkey-patch it to support additional encodings
+function normalizeEncoding(enc) {
+  var nenc = _normalizeEncoding(enc);
+  if (typeof nenc !== 'string' && (Buffer.isEncoding === isEncoding || !isEncoding(enc))) throw new Error('Unknown encoding: ' + enc);
+  return nenc || enc;
+}
+
+// StringDecoder provides an interface for efficiently splitting a series of
+// buffers into a series of JS strings without breaking apart multi-byte
+// characters.
+exports.StringDecoder = StringDecoder;
+function StringDecoder(encoding) {
+  this.encoding = normalizeEncoding(encoding);
+  var nb;
+  switch (this.encoding) {
+    case 'utf16le':
+      this.text = utf16Text;
+      this.end = utf16End;
+      nb = 4;
+      break;
+    case 'utf8':
+      this.fillLast = utf8FillLast;
+      nb = 4;
+      break;
+    case 'base64':
+      this.text = base64Text;
+      this.end = base64End;
+      nb = 3;
+      break;
+    default:
+      this.write = simpleWrite;
+      this.end = simpleEnd;
+      return;
+  }
+  this.lastNeed = 0;
+  this.lastTotal = 0;
+  this.lastChar = Buffer.allocUnsafe(nb);
+}
+
+StringDecoder.prototype.write = function (buf) {
+  if (buf.length === 0) return '';
+  var r;
+  var i;
+  if (this.lastNeed) {
+    r = this.fillLast(buf);
+    if (r === undefined) return '';
+    i = this.lastNeed;
+    this.lastNeed = 0;
+  } else {
+    i = 0;
+  }
+  if (i < buf.length) return r ? r + this.text(buf, i) : this.text(buf, i);
+  return r || '';
+};
+
+StringDecoder.prototype.end = utf8End;
+
+// Returns only complete characters in a Buffer
+StringDecoder.prototype.text = utf8Text;
+
+// Attempts to complete a partial non-UTF-8 character using bytes from a Buffer
+StringDecoder.prototype.fillLast = function (buf) {
+  if (this.lastNeed <= buf.length) {
+    buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, this.lastNeed);
+    return this.lastChar.toString(this.encoding, 0, this.lastTotal);
+  }
+  buf.copy(this.lastChar, this.lastTotal - this.lastNeed, 0, buf.length);
+  this.lastNeed -= buf.length;
+};
+
+// Checks the type of a UTF-8 byte, whether it's ASCII, a leading byte, or a
+// continuation byte. If an invalid byte is detected, -2 is returned.
+function utf8CheckByte(byte) {
+  if (byte <= 0x7F) return 0;else if (byte >> 5 === 0x06) return 2;else if (byte >> 4 === 0x0E) return 3;else if (byte >> 3 === 0x1E) return 4;
+  return byte >> 6 === 0x02 ? -1 : -2;
+}
+
+// Checks at most 3 bytes at the end of a Buffer in order to detect an
+// incomplete multi-byte UTF-8 character. The total number of bytes (2, 3, or 4)
+// needed to complete the UTF-8 character (if applicable) are returned.
+function utf8CheckIncomplete(self, buf, i) {
+  var j = buf.length - 1;
+  if (j < i) return 0;
+  var nb = utf8CheckByte(buf[j]);
+  if (nb >= 0) {
+    if (nb > 0) self.lastNeed = nb - 1;
+    return nb;
+  }
+  if (--j < i || nb === -2) return 0;
+  nb = utf8CheckByte(buf[j]);
+  if (nb >= 0) {
+    if (nb > 0) self.lastNeed = nb - 2;
+    return nb;
+  }
+  if (--j < i || nb === -2) return 0;
+  nb = utf8CheckByte(buf[j]);
+  if (nb >= 0) {
+    if (nb > 0) {
+      if (nb === 2) nb = 0;else self.lastNeed = nb - 3;
+    }
+    return nb;
+  }
+  return 0;
+}
+
+// Validates as many continuation bytes for a multi-byte UTF-8 character as
+// needed or are available. If we see a non-continuation byte where we expect
+// one, we "replace" the validated continuation bytes we've seen so far with
+// a single UTF-8 replacement character ('\ufffd'), to match v8's UTF-8 decoding
+// behavior. The continuation byte check is included three times in the case
+// where all of the continuation bytes for a character exist in the same buffer.
+// It is also done this way as a slight performance increase instead of using a
+// loop.
+function utf8CheckExtraBytes(self, buf, p) {
+  if ((buf[0] & 0xC0) !== 0x80) {
+    self.lastNeed = 0;
+    return '\ufffd';
+  }
+  if (self.lastNeed > 1 && buf.length > 1) {
+    if ((buf[1] & 0xC0) !== 0x80) {
+      self.lastNeed = 1;
+      return '\ufffd';
+    }
+    if (self.lastNeed > 2 && buf.length > 2) {
+      if ((buf[2] & 0xC0) !== 0x80) {
+        self.lastNeed = 2;
+        return '\ufffd';
+      }
+    }
+  }
+}
+
+// Attempts to complete a multi-byte UTF-8 character using bytes from a Buffer.
+function utf8FillLast(buf) {
+  var p = this.lastTotal - this.lastNeed;
+  var r = utf8CheckExtraBytes(this, buf, p);
+  if (r !== undefined) return r;
+  if (this.lastNeed <= buf.length) {
+    buf.copy(this.lastChar, p, 0, this.lastNeed);
+    return this.lastChar.toString(this.encoding, 0, this.lastTotal);
+  }
+  buf.copy(this.lastChar, p, 0, buf.length);
+  this.lastNeed -= buf.length;
+}
+
+// Returns all complete UTF-8 characters in a Buffer. If the Buffer ended on a
+// partial character, the character's bytes are buffered until the required
+// number of bytes are available.
+function utf8Text(buf, i) {
+  var total = utf8CheckIncomplete(this, buf, i);
+  if (!this.lastNeed) return buf.toString('utf8', i);
+  this.lastTotal = total;
+  var end = buf.length - (total - this.lastNeed);
+  buf.copy(this.lastChar, 0, end);
+  return buf.toString('utf8', i, end);
+}
+
+// For UTF-8, a replacement character is added when ending on a partial
+// character.
+function utf8End(buf) {
+  var r = buf && buf.length ? this.write(buf) : '';
+  if (this.lastNeed) return r + '\ufffd';
+  return r;
+}
+
+// UTF-16LE typically needs two bytes per character, but even if we have an even
+// number of bytes available, we need to check if we end on a leading/high
+// surrogate. In that case, we need to wait for the next two bytes in order to
+// decode the last character properly.
+function utf16Text(buf, i) {
+  if ((buf.length - i) % 2 === 0) {
+    var r = buf.toString('utf16le', i);
+    if (r) {
+      var c = r.charCodeAt(r.length - 1);
+      if (c >= 0xD800 && c <= 0xDBFF) {
+        this.lastNeed = 2;
+        this.lastTotal = 4;
+        this.lastChar[0] = buf[buf.length - 2];
+        this.lastChar[1] = buf[buf.length - 1];
+        return r.slice(0, -1);
+      }
+    }
+    return r;
+  }
+  this.lastNeed = 1;
+  this.lastTotal = 2;
+  this.lastChar[0] = buf[buf.length - 1];
+  return buf.toString('utf16le', i, buf.length - 1);
+}
+
+// For UTF-16LE we do not explicitly append special replacement characters if we
+// end on a partial character, we simply let v8 handle that.
+function utf16End(buf) {
+  var r = buf && buf.length ? this.write(buf) : '';
+  if (this.lastNeed) {
+    var end = this.lastTotal - this.lastNeed;
+    return r + this.lastChar.toString('utf16le', 0, end);
+  }
+  return r;
+}
+
+function base64Text(buf, i) {
+  var n = (buf.length - i) % 3;
+  if (n === 0) return buf.toString('base64', i);
+  this.lastNeed = 3 - n;
+  this.lastTotal = 3;
+  if (n === 1) {
+    this.lastChar[0] = buf[buf.length - 1];
+  } else {
+    this.lastChar[0] = buf[buf.length - 2];
+    this.lastChar[1] = buf[buf.length - 1];
+  }
+  return buf.toString('base64', i, buf.length - n);
+}
+
+function base64End(buf) {
+  var r = buf && buf.length ? this.write(buf) : '';
+  if (this.lastNeed) return r + this.lastChar.toString('base64', 0, 3 - this.lastNeed);
+  return r;
+}
+
+// Pass bytes on through for single-byte encodings (e.g. ascii, latin1, hex)
+function simpleWrite(buf) {
+  return buf.toString(this.encoding);
+}
+
+function simpleEnd(buf) {
+  return buf && buf.length ? this.write(buf) : '';
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/string_decoder/package.json b/mqtt-backend/node_modules/string_decoder/package.json
new file mode 100644
index 0000000..b2bb141
--- /dev/null
+++ b/mqtt-backend/node_modules/string_decoder/package.json
@@ -0,0 +1,34 @@
+{
+  "name": "string_decoder",
+  "version": "1.3.0",
+  "description": "The string_decoder module from Node core",
+  "main": "lib/string_decoder.js",
+  "files": [
+    "lib"
+  ],
+  "dependencies": {
+    "safe-buffer": "~5.2.0"
+  },
+  "devDependencies": {
+    "babel-polyfill": "^6.23.0",
+    "core-util-is": "^1.0.2",
+    "inherits": "^2.0.3",
+    "tap": "~0.4.8"
+  },
+  "scripts": {
+    "test": "tap test/parallel/*.js && node test/verify-dependencies",
+    "ci": "tap test/parallel/*.js test/ours/*.js --tap | tee test.tap && node test/verify-dependencies.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/nodejs/string_decoder.git"
+  },
+  "homepage": "https://github.com/nodejs/string_decoder",
+  "keywords": [
+    "string",
+    "decoder",
+    "browser",
+    "browserify"
+  ],
+  "license": "MIT"
+}
diff --git a/mqtt-backend/node_modules/tslib/CopyrightNotice.txt b/mqtt-backend/node_modules/tslib/CopyrightNotice.txt
new file mode 100644
index 0000000..5d7d2d9
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/CopyrightNotice.txt
@@ -0,0 +1,15 @@
+/******************************************************************************
+Copyright (c) Microsoft Corporation.
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+***************************************************************************** */
+
diff --git a/mqtt-backend/node_modules/tslib/LICENSE.txt b/mqtt-backend/node_modules/tslib/LICENSE.txt
new file mode 100644
index 0000000..fa7d1bd
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/LICENSE.txt
@@ -0,0 +1,12 @@
+Copyright (c) Microsoft Corporation.
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/tslib/README.md b/mqtt-backend/node_modules/tslib/README.md
new file mode 100644
index 0000000..14b9a83
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/README.md
@@ -0,0 +1,164 @@
+# tslib
+
+This is a runtime library for [TypeScript](https://www.typescriptlang.org/) that contains all of the TypeScript helper functions.
+
+This library is primarily used by the `--importHelpers` flag in TypeScript.
+When using `--importHelpers`, a module that uses helper functions like `__extends` and `__assign` in the following emitted file:
+
+```ts
+var __assign = (this && this.__assign) || Object.assign || function(t) {
+    for (var s, i = 1, n = arguments.length; i < n; i++) {
+        s = arguments[i];
+        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
+            t[p] = s[p];
+    }
+    return t;
+};
+exports.x = {};
+exports.y = __assign({}, exports.x);
+
+```
+
+will instead be emitted as something like the following:
+
+```ts
+var tslib_1 = require("tslib");
+exports.x = {};
+exports.y = tslib_1.__assign({}, exports.x);
+```
+
+Because this can avoid duplicate declarations of things like `__extends`, `__assign`, etc., this means delivering users smaller files on average, as well as less runtime overhead.
+For optimized bundles with TypeScript, you should absolutely consider using `tslib` and `--importHelpers`.
+
+# Installing
+
+For the latest stable version, run:
+
+## npm
+
+```sh
+# TypeScript 3.9.2 or later
+npm install tslib
+
+# TypeScript 3.8.4 or earlier
+npm install tslib@^1
+
+# TypeScript 2.3.2 or earlier
+npm install tslib@1.6.1
+```
+
+## yarn
+
+```sh
+# TypeScript 3.9.2 or later
+yarn add tslib
+
+# TypeScript 3.8.4 or earlier
+yarn add tslib@^1
+
+# TypeScript 2.3.2 or earlier
+yarn add tslib@1.6.1
+```
+
+## bower
+
+```sh
+# TypeScript 3.9.2 or later
+bower install tslib
+
+# TypeScript 3.8.4 or earlier
+bower install tslib@^1
+
+# TypeScript 2.3.2 or earlier
+bower install tslib@1.6.1
+```
+
+## JSPM
+
+```sh
+# TypeScript 3.9.2 or later
+jspm install tslib
+
+# TypeScript 3.8.4 or earlier
+jspm install tslib@^1
+
+# TypeScript 2.3.2 or earlier
+jspm install tslib@1.6.1
+```
+
+# Usage
+
+Set the `importHelpers` compiler option on the command line:
+
+```
+tsc --importHelpers file.ts
+```
+
+or in your tsconfig.json:
+
+```json
+{
+    "compilerOptions": {
+        "importHelpers": true
+    }
+}
+```
+
+#### For bower and JSPM users
+
+You will need to add a `paths` mapping for `tslib`, e.g. For Bower users:
+
+```json
+{
+    "compilerOptions": {
+        "module": "amd",
+        "importHelpers": true,
+        "baseUrl": "./",
+        "paths": {
+            "tslib" : ["bower_components/tslib/tslib.d.ts"]
+        }
+    }
+}
+```
+
+For JSPM users:
+
+```json
+{
+    "compilerOptions": {
+        "module": "system",
+        "importHelpers": true,
+        "baseUrl": "./",
+        "paths": {
+            "tslib" : ["jspm_packages/npm/tslib@2.x.y/tslib.d.ts"]
+        }
+    }
+}
+```
+
+## Deployment
+
+- Choose your new version number
+- Set it in `package.json` and `bower.json`
+- Create a tag: `git tag [version]`
+- Push the tag: `git push --tags`
+- Create a [release in GitHub](https://github.com/microsoft/tslib/releases)
+- Run the [publish to npm](https://github.com/microsoft/tslib/actions?query=workflow%3A%22Publish+to+NPM%22) workflow
+
+Done.
+
+# Contribute
+
+There are many ways to [contribute](https://github.com/Microsoft/TypeScript/blob/master/CONTRIBUTING.md) to TypeScript.
+
+* [Submit bugs](https://github.com/Microsoft/TypeScript/issues) and help us verify fixes as they are checked in.
+* Review the [source code changes](https://github.com/Microsoft/TypeScript/pulls).
+* Engage with other TypeScript users and developers on [StackOverflow](http://stackoverflow.com/questions/tagged/typescript).
+* Join the [#typescript](http://twitter.com/#!/search/realtime/%23typescript) discussion on Twitter.
+* [Contribute bug fixes](https://github.com/Microsoft/TypeScript/blob/master/CONTRIBUTING.md).
+
+# Documentation
+
+* [Quick tutorial](http://www.typescriptlang.org/Tutorial)
+* [Programming handbook](http://www.typescriptlang.org/Handbook)
+* [Homepage](http://www.typescriptlang.org/)
diff --git a/mqtt-backend/node_modules/tslib/SECURITY.md b/mqtt-backend/node_modules/tslib/SECURITY.md
new file mode 100644
index 0000000..869fdfe
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/SECURITY.md
@@ -0,0 +1,41 @@
+<!-- BEGIN MICROSOFT SECURITY.MD V0.0.7 BLOCK -->
+
+## Security
+
+Microsoft takes the security of our software products and services seriously, which includes all source code repositories managed through our GitHub organizations, which include [Microsoft](https://github.com/Microsoft), [Azure](https://github.com/Azure), [DotNet](https://github.com/dotnet), [AspNet](https://github.com/aspnet), [Xamarin](https://github.com/xamarin), and [our GitHub organizations](https://opensource.microsoft.com/).
+
+If you believe you have found a security vulnerability in any Microsoft-owned repository that meets [Microsoft's definition of a security vulnerability](https://aka.ms/opensource/security/definition), please report it to us as described below.
+
+## Reporting Security Issues
+
+**Please do not report security vulnerabilities through public GitHub issues.**
+
+Instead, please report them to the Microsoft Security Response Center (MSRC) at [https://msrc.microsoft.com/create-report](https://aka.ms/opensource/security/create-report).
+
+If you prefer to submit without logging in, send email to [secure@microsoft.com](mailto:secure@microsoft.com).  If possible, encrypt your message with our PGP key; please download it from the [Microsoft Security Response Center PGP Key page](https://aka.ms/opensource/security/pgpkey).
+
+You should receive a response within 24 hours. If for some reason you do not, please follow up via email to ensure we received your original message. Additional information can be found at [microsoft.com/msrc](https://aka.ms/opensource/security/msrc). 
+
+Please include the requested information listed below (as much as you can provide) to help us better understand the nature and scope of the possible issue:
+
+  * Type of issue (e.g. buffer overflow, SQL injection, cross-site scripting, etc.)
+  * Full paths of source file(s) related to the manifestation of the issue
+  * The location of the affected source code (tag/branch/commit or direct URL)
+  * Any special configuration required to reproduce the issue
+  * Step-by-step instructions to reproduce the issue
+  * Proof-of-concept or exploit code (if possible)
+  * Impact of the issue, including how an attacker might exploit the issue
+
+This information will help us triage your report more quickly.
+
+If you are reporting for a bug bounty, more complete reports can contribute to a higher bounty award. Please visit our [Microsoft Bug Bounty Program](https://aka.ms/opensource/security/bounty) page for more details about our active programs.
+
+## Preferred Languages
+
+We prefer all communications to be in English.
+
+## Policy
+
+Microsoft follows the principle of [Coordinated Vulnerability Disclosure](https://aka.ms/opensource/security/cvd).
+
+<!-- END MICROSOFT SECURITY.MD BLOCK -->
diff --git a/mqtt-backend/node_modules/tslib/modules/index.d.ts b/mqtt-backend/node_modules/tslib/modules/index.d.ts
new file mode 100644
index 0000000..3244fab
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/modules/index.d.ts
@@ -0,0 +1,38 @@
+// Note: named reexports are used instead of `export *` because
+// TypeScript itself doesn't resolve the `export *` when checking
+// if a particular helper exists.
+export {
+  __extends,
+  __assign,
+  __rest,
+  __decorate,
+  __param,
+  __esDecorate,
+  __runInitializers,
+  __propKey,
+  __setFunctionName,
+  __metadata,
+  __awaiter,
+  __generator,
+  __exportStar,
+  __values,
+  __read,
+  __spread,
+  __spreadArrays,
+  __spreadArray,
+  __await,
+  __asyncGenerator,
+  __asyncDelegator,
+  __asyncValues,
+  __makeTemplateObject,
+  __importStar,
+  __importDefault,
+  __classPrivateFieldGet,
+  __classPrivateFieldSet,
+  __classPrivateFieldIn,
+  __createBinding,
+  __addDisposableResource,
+  __disposeResources,
+  __rewriteRelativeImportExtension,
+} from '../tslib.js';
+export * as default from '../tslib.js';
diff --git a/mqtt-backend/node_modules/tslib/modules/index.js b/mqtt-backend/node_modules/tslib/modules/index.js
new file mode 100644
index 0000000..f4f9a06
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/modules/index.js
@@ -0,0 +1,70 @@
+import tslib from '../tslib.js';
+const {
+    __extends,
+    __assign,
+    __rest,
+    __decorate,
+    __param,
+    __esDecorate,
+    __runInitializers,
+    __propKey,
+    __setFunctionName,
+    __metadata,
+    __awaiter,
+    __generator,
+    __exportStar,
+    __createBinding,
+    __values,
+    __read,
+    __spread,
+    __spreadArrays,
+    __spreadArray,
+    __await,
+    __asyncGenerator,
+    __asyncDelegator,
+    __asyncValues,
+    __makeTemplateObject,
+    __importStar,
+    __importDefault,
+    __classPrivateFieldGet,
+    __classPrivateFieldSet,
+    __classPrivateFieldIn,
+    __addDisposableResource,
+    __disposeResources,
+    __rewriteRelativeImportExtension,
+} = tslib;
+export {
+    __extends,
+    __assign,
+    __rest,
+    __decorate,
+    __param,
+    __esDecorate,
+    __runInitializers,
+    __propKey,
+    __setFunctionName,
+    __metadata,
+    __awaiter,
+    __generator,
+    __exportStar,
+    __createBinding,
+    __values,
+    __read,
+    __spread,
+    __spreadArrays,
+    __spreadArray,
+    __await,
+    __asyncGenerator,
+    __asyncDelegator,
+    __asyncValues,
+    __makeTemplateObject,
+    __importStar,
+    __importDefault,
+    __classPrivateFieldGet,
+    __classPrivateFieldSet,
+    __classPrivateFieldIn,
+    __addDisposableResource,
+    __disposeResources,
+    __rewriteRelativeImportExtension,
+};
+export default tslib;
diff --git a/mqtt-backend/node_modules/tslib/modules/package.json b/mqtt-backend/node_modules/tslib/modules/package.json
new file mode 100644
index 0000000..96ae6e5
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/modules/package.json
@@ -0,0 +1,3 @@
+{
+    "type": "module"
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/tslib/package.json b/mqtt-backend/node_modules/tslib/package.json
new file mode 100644
index 0000000..57d0578
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/package.json
@@ -0,0 +1,47 @@
+{
+    "name": "tslib",
+    "author": "Microsoft Corp.",
+    "homepage": "https://www.typescriptlang.org/",
+    "version": "2.8.1",
+    "license": "0BSD",
+    "description": "Runtime library for TypeScript helper functions",
+    "keywords": [
+        "TypeScript",
+        "Microsoft",
+        "compiler",
+        "language",
+        "javascript",
+        "tslib",
+        "runtime"
+    ],
+    "bugs": {
+        "url": "https://github.com/Microsoft/TypeScript/issues"
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/Microsoft/tslib.git"
+    },
+    "main": "tslib.js",
+    "module": "tslib.es6.js",
+    "jsnext:main": "tslib.es6.js",
+    "typings": "tslib.d.ts",
+    "sideEffects": false,
+    "exports": {
+        ".": {
+            "module": {
+                "types": "./modules/index.d.ts",
+                "default": "./tslib.es6.mjs"
+            },
+            "import": {
+                "node": "./modules/index.js",
+                "default": {
+                    "types": "./modules/index.d.ts",
+                    "default": "./tslib.es6.mjs"
+                }
+            },
+            "default": "./tslib.js"
+        },
+        "./*": "./*",
+        "./": "./"
+    }
+}
diff --git a/mqtt-backend/node_modules/tslib/tslib.d.ts b/mqtt-backend/node_modules/tslib/tslib.d.ts
new file mode 100644
index 0000000..9c27e05
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/tslib.d.ts
@@ -0,0 +1,460 @@
+/******************************************************************************
+Copyright (c) Microsoft Corporation.
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+***************************************************************************** */
+
+/**
+ * Used to shim class extends.
+ *
+ * @param d The derived class.
+ * @param b The base class.
+ */
+export declare function __extends(d: Function, b: Function): void;
+
+/**
+ * Copy the values of all of the enumerable own properties from one or more source objects to a
+ * target object. Returns the target object.
+ *
+ * @param t The target object to copy to.
+ * @param sources One or more source objects from which to copy properties
+ */
+export declare function __assign(t: any, ...sources: any[]): any;
+
+/**
+ * Performs a rest spread on an object.
+ *
+ * @param t The source value.
+ * @param propertyNames The property names excluded from the rest spread.
+ */
+export declare function __rest(t: any, propertyNames: (string | symbol)[]): any;
+
+/**
+ * Applies decorators to a target object
+ *
+ * @param decorators The set of decorators to apply.
+ * @param target The target object.
+ * @param key If specified, the own property to apply the decorators to.
+ * @param desc The property descriptor, defaults to fetching the descriptor from the target object.
+ * @experimental
+ */
+export declare function __decorate(decorators: Function[], target: any, key?: string | symbol, desc?: any): any;
+
+/**
+ * Creates an observing function decorator from a parameter decorator.
+ *
+ * @param paramIndex The parameter index to apply the decorator to.
+ * @param decorator The parameter decorator to apply. Note that the return value is ignored.
+ * @experimental
+ */
+export declare function __param(paramIndex: number, decorator: Function): Function;
+
+/**
+ * Applies decorators to a class or class member, following the native ECMAScript decorator specification.
+ * @param ctor For non-field class members, the class constructor. Otherwise, `null`.
+ * @param descriptorIn The `PropertyDescriptor` to use when unable to look up the property from `ctor`.
+ * @param decorators The decorators to apply
+ * @param contextIn The `DecoratorContext` to clone for each decorator application.
+ * @param initializers An array of field initializer mutation functions into which new initializers are written.
+ * @param extraInitializers An array of extra initializer functions into which new initializers are written.
+ */
+export declare function __esDecorate(ctor: Function | null, descriptorIn: object | null, decorators: Function[], contextIn: object, initializers: Function[] | null, extraInitializers: Function[]): void;
+
+/**
+ * Runs field initializers or extra initializers generated by `__esDecorate`.
+ * @param thisArg The `this` argument to use.
+ * @param initializers The array of initializers to evaluate.
+ * @param value The initial value to pass to the initializers.
+ */
+export declare function __runInitializers(thisArg: unknown, initializers: Function[], value?: any): any;
+
+/**
+ * Converts a computed property name into a `string` or `symbol` value.
+ */
+export declare function __propKey(x: any): string | symbol;
+
+/**
+ * Assigns the name of a function derived from the left-hand side of an assignment.
+ * @param f The function to rename.
+ * @param name The new name for the function.
+ * @param prefix A prefix (such as `"get"` or `"set"`) to insert before the name.
+ */
+export declare function __setFunctionName(f: Function, name: string | symbol, prefix?: string): Function;
+
+/**
+ * Creates a decorator that sets metadata.
+ *
+ * @param metadataKey The metadata key
+ * @param metadataValue The metadata value
+ * @experimental
+ */
+export declare function __metadata(metadataKey: any, metadataValue: any): Function;
+
+/**
+ * Converts a generator function into a pseudo-async function, by treating each `yield` as an `await`.
+ *
+ * @param thisArg The reference to use as the `this` value in the generator function
+ * @param _arguments The optional arguments array
+ * @param P The optional promise constructor argument, defaults to the `Promise` property of the global object.
+ * @param generator The generator function
+ */
+export declare function __awaiter(thisArg: any, _arguments: any, P: Function, generator: Function): any;
+
+/**
+ * Creates an Iterator object using the body as the implementation.
+ *
+ * @param thisArg The reference to use as the `this` value in the function
+ * @param body The generator state-machine based implementation.
+ *
+ * @see [./docs/generator.md]
+ */
+export declare function __generator(thisArg: any, body: Function): any;
+
+/**
+ * Creates bindings for all enumerable properties of `m` on `exports`
+ *
+ * @param m The source object
+ * @param o The `exports` object.
+ */
+export declare function __exportStar(m: any, o: any): void;
+
+/**
+ * Creates a value iterator from an `Iterable` or `ArrayLike` object.
+ *
+ * @param o The object.
+ * @throws {TypeError} If `o` is neither `Iterable`, nor an `ArrayLike`.
+ */
+export declare function __values(o: any): any;
+
+/**
+ * Reads values from an `Iterable` or `ArrayLike` object and returns the resulting array.
+ *
+ * @param o The object to read from.
+ * @param n The maximum number of arguments to read, defaults to `Infinity`.
+ */
+export declare function __read(o: any, n?: number): any[];
+
+/**
+ * Creates an array from iterable spread.
+ *
+ * @param args The Iterable objects to spread.
+ * @deprecated since TypeScript 4.2 - Use `__spreadArray`
+ */
+export declare function __spread(...args: any[][]): any[];
+
+/**
+ * Creates an array from array spread.
+ *
+ * @param args The ArrayLikes to spread into the resulting array.
+ * @deprecated since TypeScript 4.2 - Use `__spreadArray`
+ */
+export declare function __spreadArrays(...args: any[][]): any[];
+
+/**
+ * Spreads the `from` array into the `to` array.
+ *
+ * @param pack Replace empty elements with `undefined`.
+ */
+export declare function __spreadArray(to: any[], from: any[], pack?: boolean): any[];
+
+/**
+ * Creates an object that signals to `__asyncGenerator` that it shouldn't be yielded,
+ * and instead should be awaited and the resulting value passed back to the generator.
+ *
+ * @param v The value to await.
+ */
+export declare function __await(v: any): any;
+
+/**
+ * Converts a generator function into an async generator function, by using `yield __await`
+ * in place of normal `await`.
+ *
+ * @param thisArg The reference to use as the `this` value in the generator function
+ * @param _arguments The optional arguments array
+ * @param generator The generator function
+ */
+export declare function __asyncGenerator(thisArg: any, _arguments: any, generator: Function): any;
+
+/**
+ * Used to wrap a potentially async iterator in such a way so that it wraps the result
+ * of calling iterator methods of `o` in `__await` instances, and then yields the awaited values.
+ *
+ * @param o The potentially async iterator.
+ * @returns A synchronous iterator yielding `__await` instances on every odd invocation
+ *          and returning the awaited `IteratorResult` passed to `next` every even invocation.
+ */
+export declare function __asyncDelegator(o: any): any;
+
+/**
+ * Creates a value async iterator from an `AsyncIterable`, `Iterable` or `ArrayLike` object.
+ *
+ * @param o The object.
+ * @throws {TypeError} If `o` is neither `AsyncIterable`, `Iterable`, nor an `ArrayLike`.
+ */
+export declare function __asyncValues(o: any): any;
+
+/**
+ * Creates a `TemplateStringsArray` frozen object from the `cooked` and `raw` arrays.
+ *
+ * @param cooked The cooked possibly-sparse array.
+ * @param raw The raw string content.
+ */
+export declare function __makeTemplateObject(cooked: string[], raw: string[]): TemplateStringsArray;
+
+/**
+ * Used to shim default and named imports in ECMAScript Modules transpiled to CommonJS.
+ *
+ * ```js
+ * import Default, { Named, Other } from "mod";
+ * // or
+ * import { default as Default, Named, Other } from "mod";
+ * ```
+ *
+ * @param mod The CommonJS module exports object.
+ */
+export declare function __importStar<T>(mod: T): T;
+
+/**
+ * Used to shim default imports in ECMAScript Modules transpiled to CommonJS.
+ *
+ * ```js
+ * import Default from "mod";
+ * ```
+ *
+ * @param mod The CommonJS module exports object.
+ */
+export declare function __importDefault<T>(mod: T): T | { default: T };
+
+/**
+ * Emulates reading a private instance field.
+ *
+ * @param receiver The instance from which to read the private field.
+ * @param state A WeakMap containing the private field value for an instance.
+ * @param kind Either `"f"` for a field, `"a"` for an accessor, or `"m"` for a method.
+ *
+ * @throws {TypeError} If `state` doesn't have an entry for `receiver`.
+ */
+export declare function __classPrivateFieldGet<T extends object, V>(
+    receiver: T,
+    state: { has(o: T): boolean, get(o: T): V | undefined },
+    kind?: "f"
+): V;
+
+/**
+ * Emulates reading a private static field.
+ *
+ * @param receiver The object from which to read the private static field.
+ * @param state The class constructor containing the definition of the static field.
+ * @param kind Either `"f"` for a field, `"a"` for an accessor, or `"m"` for a method.
+ * @param f The descriptor that holds the static field value.
+ *
+ * @throws {TypeError} If `receiver` is not `state`.
+ */
+export declare function __classPrivateFieldGet<T extends new (...args: any[]) => unknown, V>(
+    receiver: T,
+    state: T,
+    kind: "f",
+    f: { value: V }
+): V;
+
+/**
+ * Emulates evaluating a private instance "get" accessor.
+ *
+ * @param receiver The instance on which to evaluate the private "get" accessor.
+ * @param state A WeakSet used to verify an instance supports the private "get" accessor.
+ * @param kind Either `"f"` for a field, `"a"` for an accessor, or `"m"` for a method.
+ * @param f The "get" accessor function to evaluate.
+ *
+ * @throws {TypeError} If `state` doesn't have an entry for `receiver`.
+ */
+export declare function __classPrivateFieldGet<T extends object, V>(
+    receiver: T,
+    state: { has(o: T): boolean },
+    kind: "a",
+    f: () => V
+): V;
+
+/**
+ * Emulates evaluating a private static "get" accessor.
+ *
+ * @param receiver The object on which to evaluate the private static "get" accessor.
+ * @param state The class constructor containing the definition of the static "get" accessor.
+ * @param kind Either `"f"` for a field, `"a"` for an accessor, or `"m"` for a method.
+ * @param f The "get" accessor function to evaluate.
+ *
+ * @throws {TypeError} If `receiver` is not `state`.
+ */
+export declare function __classPrivateFieldGet<T extends new (...args: any[]) => unknown, V>(
+    receiver: T,
+    state: T,
+    kind: "a",
+    f: () => V
+): V;
+
+/**
+ * Emulates reading a private instance method.
+ *
+ * @param receiver The instance from which to read a private method.
+ * @param state A WeakSet used to verify an instance supports the private method.
+ * @param kind Either `"f"` for a field, `"a"` for an accessor, or `"m"` for a method.
+ * @param f The function to return as the private instance method.
+ *
+ * @throws {TypeError} If `state` doesn't have an entry for `receiver`.
+ */
+export declare function __classPrivateFieldGet<T extends object, V extends (...args: any[]) => unknown>(
+    receiver: T,
+    state: { has(o: T): boolean },
+    kind: "m",
+    f: V
+): V;
+
+/**
+ * Emulates reading a private static method.
+ *
+ * @param receiver The object from which to read the private static method.
+ * @param state The class constructor containing the definition of the static method.
+ * @param kind Either `"f"` for a field, `"a"` for an accessor, or `"m"` for a method.
+ * @param f The function to return as the private static method.
+ *
+ * @throws {TypeError} If `receiver` is not `state`.
+ */
+export declare function __classPrivateFieldGet<T extends new (...args: any[]) => unknown, V extends (...args: any[]) => unknown>(
+    receiver: T,
+    state: T,
+    kind: "m",
+    f: V
+): V;
+
+/**
+ * Emulates writing to a private instance field.
+ *
+ * @param receiver The instance on which to set a private field value.
+ * @param state A WeakMap used to store the private field value for an instance.
+ * @param value The value to store in the private field.
+ * @param kind Either `"f"` for a field, `"a"` for an accessor, or `"m"` for a method.
+ *
+ * @throws {TypeError} If `state` doesn't have an entry for `receiver`.
+ */
+export declare function __classPrivateFieldSet<T extends object, V>(
+    receiver: T,
+    state: { has(o: T): boolean, set(o: T, value: V): unknown },
+    value: V,
+    kind?: "f"
+): V;
+
+/**
+ * Emulates writing to a private static field.
+ *
+ * @param receiver The object on which to set the private static field.
+ * @param state The class constructor containing the definition of the private static field.
+ * @param value The value to store in the private field.
+ * @param kind Either `"f"` for a field, `"a"` for an accessor, or `"m"` for a method.
+ * @param f The descriptor that holds the static field value.
+ *
+ * @throws {TypeError} If `receiver` is not `state`.
+ */
+export declare function __classPrivateFieldSet<T extends new (...args: any[]) => unknown, V>(
+    receiver: T,
+    state: T,
+    value: V,
+    kind: "f",
+    f: { value: V }
+): V;
+
+/**
+ * Emulates writing to a private instance "set" accessor.
+ *
+ * @param receiver The instance on which to evaluate the private instance "set" accessor.
+ * @param state A WeakSet used to verify an instance supports the private "set" accessor.
+ * @param value The value to store in the private accessor.
+ * @param kind Either `"f"` for a field, `"a"` for an accessor, or `"m"` for a method.
+ * @param f The "set" accessor function to evaluate.
+ *
+ * @throws {TypeError} If `state` doesn't have an entry for `receiver`.
+ */
+export declare function __classPrivateFieldSet<T extends object, V>(
+    receiver: T,
+    state: { has(o: T): boolean },
+    value: V,
+    kind: "a",
+    f: (v: V) => void
+): V;
+
+/**
+ * Emulates writing to a private static "set" accessor.
+ *
+ * @param receiver The object on which to evaluate the private static "set" accessor.
+ * @param state The class constructor containing the definition of the static "set" accessor.
+ * @param value The value to store in the private field.
+ * @param kind Either `"f"` for a field, `"a"` for an accessor, or `"m"` for a method.
+ * @param f The "set" accessor function to evaluate.
+ *
+ * @throws {TypeError} If `receiver` is not `state`.
+ */
+export declare function __classPrivateFieldSet<T extends new (...args: any[]) => unknown, V>(
+    receiver: T,
+    state: T,
+    value: V,
+    kind: "a",
+    f: (v: V) => void
+): V;
+
+/**
+ * Checks for the existence of a private field/method/accessor.
+ *
+ * @param state The class constructor containing the static member, or the WeakMap or WeakSet associated with a private instance member.
+ * @param receiver The object for which to test the presence of the private member.
+ */
+export declare function __classPrivateFieldIn(
+    state: (new (...args: any[]) => unknown) | { has(o: any): boolean },
+    receiver: unknown,
+): boolean;
+
+/**
+ * Creates a re-export binding on `object` with key `objectKey` that references `target[key]`.
+ *
+ * @param object The local `exports` object.
+ * @param target The object to re-export from.
+ * @param key The property key of `target` to re-export.
+ * @param objectKey The property key to re-export as. Defaults to `key`.
+ */
+export declare function __createBinding(object: object, target: object, key: PropertyKey, objectKey?: PropertyKey): void;
+
+/**
+ * Adds a disposable resource to a resource-tracking environment object.
+ * @param env A resource-tracking environment object.
+ * @param value Either a Disposable or AsyncDisposable object, `null`, or `undefined`.
+ * @param async When `true`, `AsyncDisposable` resources can be added. When `false`, `AsyncDisposable` resources cannot be added.
+ * @returns The {@link value} argument.
+ *
+ * @throws {TypeError} If {@link value} is not an object, or if either `Symbol.dispose` or `Symbol.asyncDispose` are not
+ * defined, or if {@link value} does not have an appropriate `Symbol.dispose` or `Symbol.asyncDispose` method.
+ */
+export declare function __addDisposableResource<T>(env: { stack: { value?: unknown, dispose?: Function, async: boolean }[]; error: unknown; hasError: boolean; }, value: T, async: boolean): T;
+
+/**
+ * Disposes all resources in a resource-tracking environment object.
+ * @param env A resource-tracking environment object.
+ * @returns A {@link Promise} if any resources in the environment were marked as `async` when added; otherwise, `void`.
+ *
+ * @throws {SuppressedError} if an error thrown during disposal would have suppressed a prior error from disposal or the
+ * error recorded in the resource-tracking environment object.
+ * @seealso {@link __addDisposableResource}
+ */
+export declare function __disposeResources(env: { stack: { value?: unknown, dispose?: Function, async: boolean }[]; error: unknown; hasError: boolean; }): any;
+
+/**
+ * Transforms a relative import specifier ending in a non-declaration TypeScript file extension to its JavaScript file extension counterpart.
+ * @param path The import specifier.
+ * @param preserveJsx Causes '*.tsx' to transform to '*.jsx' instead of '*.js'. Should be true when `--jsx` is set to `preserve`.
+ */
+export declare function __rewriteRelativeImportExtension(path: string, preserveJsx?: boolean): string;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/tslib/tslib.es6.html b/mqtt-backend/node_modules/tslib/tslib.es6.html
new file mode 100644
index 0000000..b122e41
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/tslib.es6.html
@@ -0,0 +1 @@
+<script src="tslib.es6.js"></script>
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/tslib/tslib.es6.js b/mqtt-backend/node_modules/tslib/tslib.es6.js
new file mode 100644
index 0000000..67ba5c5
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/tslib.es6.js
@@ -0,0 +1,402 @@
+/******************************************************************************
+Copyright (c) Microsoft Corporation.
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+***************************************************************************** */
+/* global Reflect, Promise, SuppressedError, Symbol, Iterator */
+
+var extendStatics = function(d, b) {
+    extendStatics = Object.setPrototypeOf ||
+        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+        function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
+    return extendStatics(d, b);
+};
+
+export function __extends(d, b) {
+    if (typeof b !== "function" && b !== null)
+        throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+    extendStatics(d, b);
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+export var __assign = function() {
+    __assign = Object.assign || function __assign(t) {
+        for (var s, i = 1, n = arguments.length; i < n; i++) {
+            s = arguments[i];
+            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
+        }
+        return t;
+    }
+    return __assign.apply(this, arguments);
+}
+
+export function __rest(s, e) {
+    var t = {};
+    for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
+        t[p] = s[p];
+    if (s != null && typeof Object.getOwnPropertySymbols === "function")
+        for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
+            if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
+                t[p[i]] = s[p[i]];
+        }
+    return t;
+}
+
+export function __decorate(decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+}
+
+export function __param(paramIndex, decorator) {
+    return function (target, key) { decorator(target, key, paramIndex); }
+}
+
+export function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {
+    function accept(f) { if (f !== void 0 && typeof f !== "function") throw new TypeError("Function expected"); return f; }
+    var kind = contextIn.kind, key = kind === "getter" ? "get" : kind === "setter" ? "set" : "value";
+    var target = !descriptorIn && ctor ? contextIn["static"] ? ctor : ctor.prototype : null;
+    var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});
+    var _, done = false;
+    for (var i = decorators.length - 1; i >= 0; i--) {
+        var context = {};
+        for (var p in contextIn) context[p] = p === "access" ? {} : contextIn[p];
+        for (var p in contextIn.access) context.access[p] = contextIn.access[p];
+        context.addInitializer = function (f) { if (done) throw new TypeError("Cannot add initializers after decoration has completed"); extraInitializers.push(accept(f || null)); };
+        var result = (0, decorators[i])(kind === "accessor" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);
+        if (kind === "accessor") {
+            if (result === void 0) continue;
+            if (result === null || typeof result !== "object") throw new TypeError("Object expected");
+            if (_ = accept(result.get)) descriptor.get = _;
+            if (_ = accept(result.set)) descriptor.set = _;
+            if (_ = accept(result.init)) initializers.unshift(_);
+        }
+        else if (_ = accept(result)) {
+            if (kind === "field") initializers.unshift(_);
+            else descriptor[key] = _;
+        }
+    }
+    if (target) Object.defineProperty(target, contextIn.name, descriptor);
+    done = true;
+};
+
+export function __runInitializers(thisArg, initializers, value) {
+    var useValue = arguments.length > 2;
+    for (var i = 0; i < initializers.length; i++) {
+        value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);
+    }
+    return useValue ? value : void 0;
+};
+
+export function __propKey(x) {
+    return typeof x === "symbol" ? x : "".concat(x);
+};
+
+export function __setFunctionName(f, name, prefix) {
+    if (typeof name === "symbol") name = name.description ? "[".concat(name.description, "]") : "";
+    return Object.defineProperty(f, "name", { configurable: true, value: prefix ? "".concat(prefix, " ", name) : name });
+};
+
+export function __metadata(metadataKey, metadataValue) {
+    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(metadataKey, metadataValue);
+}
+
+export function __awaiter(thisArg, _arguments, P, generator) {
+    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
+    });
+}
+
+export function __generator(thisArg, body) {
+    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype);
+    return g.next = verb(0), g["throw"] = verb(1), g["return"] = verb(2), typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
+    function verb(n) { return function (v) { return step([n, v]); }; }
+    function step(op) {
+        if (f) throw new TypeError("Generator is already executing.");
+        while (g && (g = 0, op[0] && (_ = 0)), _) try {
+            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
+            if (y = 0, t) op = [op[0] & 2, t.value];
+            switch (op[0]) {
+                case 0: case 1: t = op; break;
+                case 4: _.label++; return { value: op[1], done: false };
+                case 5: _.label++; y = op[1]; op = [0]; continue;
+                case 7: op = _.ops.pop(); _.trys.pop(); continue;
+                default:
+                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
+                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
+                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
+                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
+                    if (t[2]) _.ops.pop();
+                    _.trys.pop(); continue;
+            }
+            op = body.call(thisArg, _);
+        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
+        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
+    }
+}
+
+export var __createBinding = Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+        desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+});
+
+export function __exportStar(m, o) {
+    for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);
+}
+
+export function __values(o) {
+    var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
+    if (m) return m.call(o);
+    if (o && typeof o.length === "number") return {
+        next: function () {
+            if (o && i >= o.length) o = void 0;
+            return { value: o && o[i++], done: !o };
+        }
+    };
+    throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
+}
+
+export function __read(o, n) {
+    var m = typeof Symbol === "function" && o[Symbol.iterator];
+    if (!m) return o;
+    var i = m.call(o), r, ar = [], e;
+    try {
+        while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
+    }
+    catch (error) { e = { error: error }; }
+    finally {
+        try {
+            if (r && !r.done && (m = i["return"])) m.call(i);
+        }
+        finally { if (e) throw e.error; }
+    }
+    return ar;
+}
+
+/** @deprecated */
+export function __spread() {
+    for (var ar = [], i = 0; i < arguments.length; i++)
+        ar = ar.concat(__read(arguments[i]));
+    return ar;
+}
+
+/** @deprecated */
+export function __spreadArrays() {
+    for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;
+    for (var r = Array(s), k = 0, i = 0; i < il; i++)
+        for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)
+            r[k] = a[j];
+    return r;
+}
+
+export function __spreadArray(to, from, pack) {
+    if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
+        if (ar || !(i in from)) {
+            if (!ar) ar = Array.prototype.slice.call(from, 0, i);
+            ar[i] = from[i];
+        }
+    }
+    return to.concat(ar || Array.prototype.slice.call(from));
+}
+
+export function __await(v) {
+    return this instanceof __await ? (this.v = v, this) : new __await(v);
+}
+
+export function __asyncGenerator(thisArg, _arguments, generator) {
+    if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
+    var g = generator.apply(thisArg, _arguments || []), i, q = [];
+    return i = Object.create((typeof AsyncIterator === "function" ? AsyncIterator : Object).prototype), verb("next"), verb("throw"), verb("return", awaitReturn), i[Symbol.asyncIterator] = function () { return this; }, i;
+    function awaitReturn(f) { return function (v) { return Promise.resolve(v).then(f, reject); }; }
+    function verb(n, f) { if (g[n]) { i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; if (f) i[n] = f(i[n]); } }
+    function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }
+    function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }
+    function fulfill(value) { resume("next", value); }
+    function reject(value) { resume("throw", value); }
+    function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }
+}
+
+export function __asyncDelegator(o) {
+    var i, p;
+    return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i;
+    function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }
+}
+
+export function __asyncValues(o) {
+    if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
+    var m = o[Symbol.asyncIterator], i;
+    return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i);
+    function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }
+    function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }
+}
+
+export function __makeTemplateObject(cooked, raw) {
+    if (Object.defineProperty) { Object.defineProperty(cooked, "raw", { value: raw }); } else { cooked.raw = raw; }
+    return cooked;
+};
+
+var __setModuleDefault = Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+};
+
+var ownKeys = function(o) {
+    ownKeys = Object.getOwnPropertyNames || function (o) {
+        var ar = [];
+        for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
+        return ar;
+    };
+    return ownKeys(o);
+};
+
+export function __importStar(mod) {
+    if (mod && mod.__esModule) return mod;
+    var result = {};
+    if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
+    __setModuleDefault(result, mod);
+    return result;
+}
+
+export function __importDefault(mod) {
+    return (mod && mod.__esModule) ? mod : { default: mod };
+}
+
+export function __classPrivateFieldGet(receiver, state, kind, f) {
+    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
+    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
+    return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver);
+}
+
+export function __classPrivateFieldSet(receiver, state, value, kind, f) {
+    if (kind === "m") throw new TypeError("Private method is not writable");
+    if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
+    if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot write private member to an object whose class did not declare it");
+    return (kind === "a" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;
+}
+
+export function __classPrivateFieldIn(state, receiver) {
+    if (receiver === null || (typeof receiver !== "object" && typeof receiver !== "function")) throw new TypeError("Cannot use 'in' operator on non-object");
+    return typeof state === "function" ? receiver === state : state.has(receiver);
+}
+
+export function __addDisposableResource(env, value, async) {
+    if (value !== null && value !== void 0) {
+        if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
+        var dispose, inner;
+        if (async) {
+            if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
+            dispose = value[Symbol.asyncDispose];
+        }
+        if (dispose === void 0) {
+            if (!Symbol.dispose) throw new TypeError("Symbol.dispose is not defined.");
+            dispose = value[Symbol.dispose];
+            if (async) inner = dispose;
+        }
+        if (typeof dispose !== "function") throw new TypeError("Object not disposable.");
+        if (inner) dispose = function() { try { inner.call(this); } catch (e) { return Promise.reject(e); } };
+        env.stack.push({ value: value, dispose: dispose, async: async });
+    }
+    else if (async) {
+        env.stack.push({ async: true });
+    }
+    return value;
+
+}
+
+var _SuppressedError = typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) {
+    var e = new Error(message);
+    return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e;
+};
+
+export function __disposeResources(env) {
+    function fail(e) {
+        env.error = env.hasError ? new _SuppressedError(e, env.error, "An error was suppressed during disposal.") : e;
+        env.hasError = true;
+    }
+    var r, s = 0;
+    function next() {
+        while (r = env.stack.pop()) {
+            try {
+                if (!r.async && s === 1) return s = 0, env.stack.push(r), Promise.resolve().then(next);
+                if (r.dispose) {
+                    var result = r.dispose.call(r.value);
+                    if (r.async) return s |= 2, Promise.resolve(result).then(next, function(e) { fail(e); return next(); });
+                }
+                else s |= 1;
+            }
+            catch (e) {
+                fail(e);
+            }
+        }
+        if (s === 1) return env.hasError ? Promise.reject(env.error) : Promise.resolve();
+        if (env.hasError) throw env.error;
+    }
+    return next();
+}
+
+export function __rewriteRelativeImportExtension(path, preserveJsx) {
+    if (typeof path === "string" && /^\.\.?\//.test(path)) {
+        return path.replace(/\.(tsx)$|((?:\.d)?)((?:\.[^./]+?)?)\.([cm]?)ts$/i, function (m, tsx, d, ext, cm) {
+            return tsx ? preserveJsx ? ".jsx" : ".js" : d && (!ext || !cm) ? m : (d + ext + "." + cm.toLowerCase() + "js");
+        });
+    }
+    return path;
+}
+
+export default {
+    __extends: __extends,
+    __assign: __assign,
+    __rest: __rest,
+    __decorate: __decorate,
+    __param: __param,
+    __esDecorate: __esDecorate,
+    __runInitializers: __runInitializers,
+    __propKey: __propKey,
+    __setFunctionName: __setFunctionName,
+    __metadata: __metadata,
+    __awaiter: __awaiter,
+    __generator: __generator,
+    __createBinding: __createBinding,
+    __exportStar: __exportStar,
+    __values: __values,
+    __read: __read,
+    __spread: __spread,
+    __spreadArrays: __spreadArrays,
+    __spreadArray: __spreadArray,
+    __await: __await,
+    __asyncGenerator: __asyncGenerator,
+    __asyncDelegator: __asyncDelegator,
+    __asyncValues: __asyncValues,
+    __makeTemplateObject: __makeTemplateObject,
+    __importStar: __importStar,
+    __importDefault: __importDefault,
+    __classPrivateFieldGet: __classPrivateFieldGet,
+    __classPrivateFieldSet: __classPrivateFieldSet,
+    __classPrivateFieldIn: __classPrivateFieldIn,
+    __addDisposableResource: __addDisposableResource,
+    __disposeResources: __disposeResources,
+    __rewriteRelativeImportExtension: __rewriteRelativeImportExtension,
+};
diff --git a/mqtt-backend/node_modules/tslib/tslib.es6.mjs b/mqtt-backend/node_modules/tslib/tslib.es6.mjs
new file mode 100644
index 0000000..c17990a
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/tslib.es6.mjs
@@ -0,0 +1,401 @@
+/******************************************************************************
+Copyright (c) Microsoft Corporation.
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+***************************************************************************** */
+/* global Reflect, Promise, SuppressedError, Symbol, Iterator */
+
+var extendStatics = function(d, b) {
+  extendStatics = Object.setPrototypeOf ||
+      ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+      function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
+  return extendStatics(d, b);
+};
+
+export function __extends(d, b) {
+  if (typeof b !== "function" && b !== null)
+      throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+  extendStatics(d, b);
+  function __() { this.constructor = d; }
+  d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+}
+
+export var __assign = function() {
+  __assign = Object.assign || function __assign(t) {
+      for (var s, i = 1, n = arguments.length; i < n; i++) {
+          s = arguments[i];
+          for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
+      }
+      return t;
+  }
+  return __assign.apply(this, arguments);
+}
+
+export function __rest(s, e) {
+  var t = {};
+  for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
+      t[p] = s[p];
+  if (s != null && typeof Object.getOwnPropertySymbols === "function")
+      for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
+          if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
+              t[p[i]] = s[p[i]];
+      }
+  return t;
+}
+
+export function __decorate(decorators, target, key, desc) {
+  var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+  if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+  else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+  return c > 3 && r && Object.defineProperty(target, key, r), r;
+}
+
+export function __param(paramIndex, decorator) {
+  return function (target, key) { decorator(target, key, paramIndex); }
+}
+
+export function __esDecorate(ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {
+  function accept(f) { if (f !== void 0 && typeof f !== "function") throw new TypeError("Function expected"); return f; }
+  var kind = contextIn.kind, key = kind === "getter" ? "get" : kind === "setter" ? "set" : "value";
+  var target = !descriptorIn && ctor ? contextIn["static"] ? ctor : ctor.prototype : null;
+  var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});
+  var _, done = false;
+  for (var i = decorators.length - 1; i >= 0; i--) {
+      var context = {};
+      for (var p in contextIn) context[p] = p === "access" ? {} : contextIn[p];
+      for (var p in contextIn.access) context.access[p] = contextIn.access[p];
+      context.addInitializer = function (f) { if (done) throw new TypeError("Cannot add initializers after decoration has completed"); extraInitializers.push(accept(f || null)); };
+      var result = (0, decorators[i])(kind === "accessor" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);
+      if (kind === "accessor") {
+          if (result === void 0) continue;
+          if (result === null || typeof result !== "object") throw new TypeError("Object expected");
+          if (_ = accept(result.get)) descriptor.get = _;
+          if (_ = accept(result.set)) descriptor.set = _;
+          if (_ = accept(result.init)) initializers.unshift(_);
+      }
+      else if (_ = accept(result)) {
+          if (kind === "field") initializers.unshift(_);
+          else descriptor[key] = _;
+      }
+  }
+  if (target) Object.defineProperty(target, contextIn.name, descriptor);
+  done = true;
+};
+
+export function __runInitializers(thisArg, initializers, value) {
+  var useValue = arguments.length > 2;
+  for (var i = 0; i < initializers.length; i++) {
+      value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);
+  }
+  return useValue ? value : void 0;
+};
+
+export function __propKey(x) {
+  return typeof x === "symbol" ? x : "".concat(x);
+};
+
+export function __setFunctionName(f, name, prefix) {
+  if (typeof name === "symbol") name = name.description ? "[".concat(name.description, "]") : "";
+  return Object.defineProperty(f, "name", { configurable: true, value: prefix ? "".concat(prefix, " ", name) : name });
+};
+
+export function __metadata(metadataKey, metadataValue) {
+  if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(metadataKey, metadataValue);
+}
+
+export function __awaiter(thisArg, _arguments, P, generator) {
+  function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
+  return new (P || (P = Promise))(function (resolve, reject) {
+      function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+      function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+      function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
+      step((generator = generator.apply(thisArg, _arguments || [])).next());
+  });
+}
+
+export function __generator(thisArg, body) {
+  var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype);
+  return g.next = verb(0), g["throw"] = verb(1), g["return"] = verb(2), typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
+  function verb(n) { return function (v) { return step([n, v]); }; }
+  function step(op) {
+      if (f) throw new TypeError("Generator is already executing.");
+      while (g && (g = 0, op[0] && (_ = 0)), _) try {
+          if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
+          if (y = 0, t) op = [op[0] & 2, t.value];
+          switch (op[0]) {
+              case 0: case 1: t = op; break;
+              case 4: _.label++; return { value: op[1], done: false };
+              case 5: _.label++; y = op[1]; op = [0]; continue;
+              case 7: op = _.ops.pop(); _.trys.pop(); continue;
+              default:
+                  if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
+                  if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
+                  if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
+                  if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
+                  if (t[2]) _.ops.pop();
+                  _.trys.pop(); continue;
+          }
+          op = body.call(thisArg, _);
+      } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
+      if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
+  }
+}
+
+export var __createBinding = Object.create ? (function(o, m, k, k2) {
+  if (k2 === undefined) k2 = k;
+  var desc = Object.getOwnPropertyDescriptor(m, k);
+  if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+  }
+  Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+  if (k2 === undefined) k2 = k;
+  o[k2] = m[k];
+});
+
+export function __exportStar(m, o) {
+  for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);
+}
+
+export function __values(o) {
+  var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
+  if (m) return m.call(o);
+  if (o && typeof o.length === "number") return {
+      next: function () {
+          if (o && i >= o.length) o = void 0;
+          return { value: o && o[i++], done: !o };
+      }
+  };
+  throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
+}
+
+export function __read(o, n) {
+  var m = typeof Symbol === "function" && o[Symbol.iterator];
+  if (!m) return o;
+  var i = m.call(o), r, ar = [], e;
+  try {
+      while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
+  }
+  catch (error) { e = { error: error }; }
+  finally {
+      try {
+          if (r && !r.done && (m = i["return"])) m.call(i);
+      }
+      finally { if (e) throw e.error; }
+  }
+  return ar;
+}
+
+/** @deprecated */
+export function __spread() {
+  for (var ar = [], i = 0; i < arguments.length; i++)
+      ar = ar.concat(__read(arguments[i]));
+  return ar;
+}
+
+/** @deprecated */
+export function __spreadArrays() {
+  for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;
+  for (var r = Array(s), k = 0, i = 0; i < il; i++)
+      for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)
+          r[k] = a[j];
+  return r;
+}
+
+export function __spreadArray(to, from, pack) {
+  if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
+      if (ar || !(i in from)) {
+          if (!ar) ar = Array.prototype.slice.call(from, 0, i);
+          ar[i] = from[i];
+      }
+  }
+  return to.concat(ar || Array.prototype.slice.call(from));
+}
+
+export function __await(v) {
+  return this instanceof __await ? (this.v = v, this) : new __await(v);
+}
+
+export function __asyncGenerator(thisArg, _arguments, generator) {
+  if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
+  var g = generator.apply(thisArg, _arguments || []), i, q = [];
+  return i = Object.create((typeof AsyncIterator === "function" ? AsyncIterator : Object).prototype), verb("next"), verb("throw"), verb("return", awaitReturn), i[Symbol.asyncIterator] = function () { return this; }, i;
+  function awaitReturn(f) { return function (v) { return Promise.resolve(v).then(f, reject); }; }
+  function verb(n, f) { if (g[n]) { i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; if (f) i[n] = f(i[n]); } }
+  function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }
+  function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }
+  function fulfill(value) { resume("next", value); }
+  function reject(value) { resume("throw", value); }
+  function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }
+}
+
+export function __asyncDelegator(o) {
+  var i, p;
+  return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i;
+  function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }
+}
+
+export function __asyncValues(o) {
+  if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
+  var m = o[Symbol.asyncIterator], i;
+  return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i);
+  function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }
+  function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }
+}
+
+export function __makeTemplateObject(cooked, raw) {
+  if (Object.defineProperty) { Object.defineProperty(cooked, "raw", { value: raw }); } else { cooked.raw = raw; }
+  return cooked;
+};
+
+var __setModuleDefault = Object.create ? (function(o, v) {
+  Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+  o["default"] = v;
+};
+
+var ownKeys = function(o) {
+  ownKeys = Object.getOwnPropertyNames || function (o) {
+    var ar = [];
+    for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
+    return ar;
+  };
+  return ownKeys(o);
+};
+
+export function __importStar(mod) {
+  if (mod && mod.__esModule) return mod;
+  var result = {};
+  if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
+  __setModuleDefault(result, mod);
+  return result;
+}
+
+export function __importDefault(mod) {
+  return (mod && mod.__esModule) ? mod : { default: mod };
+}
+
+export function __classPrivateFieldGet(receiver, state, kind, f) {
+  if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
+  if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
+  return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver);
+}
+
+export function __classPrivateFieldSet(receiver, state, value, kind, f) {
+  if (kind === "m") throw new TypeError("Private method is not writable");
+  if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
+  if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot write private member to an object whose class did not declare it");
+  return (kind === "a" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;
+}
+
+export function __classPrivateFieldIn(state, receiver) {
+  if (receiver === null || (typeof receiver !== "object" && typeof receiver !== "function")) throw new TypeError("Cannot use 'in' operator on non-object");
+  return typeof state === "function" ? receiver === state : state.has(receiver);
+}
+
+export function __addDisposableResource(env, value, async) {
+  if (value !== null && value !== void 0) {
+    if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
+    var dispose, inner;
+    if (async) {
+      if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
+      dispose = value[Symbol.asyncDispose];
+    }
+    if (dispose === void 0) {
+      if (!Symbol.dispose) throw new TypeError("Symbol.dispose is not defined.");
+      dispose = value[Symbol.dispose];
+      if (async) inner = dispose;
+    }
+    if (typeof dispose !== "function") throw new TypeError("Object not disposable.");
+    if (inner) dispose = function() { try { inner.call(this); } catch (e) { return Promise.reject(e); } };
+    env.stack.push({ value: value, dispose: dispose, async: async });
+  }
+  else if (async) {
+    env.stack.push({ async: true });
+  }
+  return value;
+}
+
+var _SuppressedError = typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) {
+  var e = new Error(message);
+  return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e;
+};
+
+export function __disposeResources(env) {
+  function fail(e) {
+    env.error = env.hasError ? new _SuppressedError(e, env.error, "An error was suppressed during disposal.") : e;
+    env.hasError = true;
+  }
+  var r, s = 0;
+  function next() {
+    while (r = env.stack.pop()) {
+      try {
+        if (!r.async && s === 1) return s = 0, env.stack.push(r), Promise.resolve().then(next);
+        if (r.dispose) {
+          var result = r.dispose.call(r.value);
+          if (r.async) return s |= 2, Promise.resolve(result).then(next, function(e) { fail(e); return next(); });
+        }
+        else s |= 1;
+      }
+      catch (e) {
+        fail(e);
+      }
+    }
+    if (s === 1) return env.hasError ? Promise.reject(env.error) : Promise.resolve();
+    if (env.hasError) throw env.error;
+  }
+  return next();
+}
+
+export function __rewriteRelativeImportExtension(path, preserveJsx) {
+  if (typeof path === "string" && /^\.\.?\//.test(path)) {
+      return path.replace(/\.(tsx)$|((?:\.d)?)((?:\.[^./]+?)?)\.([cm]?)ts$/i, function (m, tsx, d, ext, cm) {
+          return tsx ? preserveJsx ? ".jsx" : ".js" : d && (!ext || !cm) ? m : (d + ext + "." + cm.toLowerCase() + "js");
+      });
+  }
+  return path;
+}
+
+export default {
+  __extends,
+  __assign,
+  __rest,
+  __decorate,
+  __param,
+  __esDecorate,
+  __runInitializers,
+  __propKey,
+  __setFunctionName,
+  __metadata,
+  __awaiter,
+  __generator,
+  __createBinding,
+  __exportStar,
+  __values,
+  __read,
+  __spread,
+  __spreadArrays,
+  __spreadArray,
+  __await,
+  __asyncGenerator,
+  __asyncDelegator,
+  __asyncValues,
+  __makeTemplateObject,
+  __importStar,
+  __importDefault,
+  __classPrivateFieldGet,
+  __classPrivateFieldSet,
+  __classPrivateFieldIn,
+  __addDisposableResource,
+  __disposeResources,
+  __rewriteRelativeImportExtension,
+};
diff --git a/mqtt-backend/node_modules/tslib/tslib.html b/mqtt-backend/node_modules/tslib/tslib.html
new file mode 100644
index 0000000..44c9ba5
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/tslib.html
@@ -0,0 +1 @@
+<script src="tslib.js"></script>
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/tslib/tslib.js b/mqtt-backend/node_modules/tslib/tslib.js
new file mode 100644
index 0000000..b6509f7
--- /dev/null
+++ b/mqtt-backend/node_modules/tslib/tslib.js
@@ -0,0 +1,484 @@
+/******************************************************************************
+Copyright (c) Microsoft Corporation.
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
+OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+***************************************************************************** */
+/* global global, define, Symbol, Reflect, Promise, SuppressedError, Iterator */
+var __extends;
+var __assign;
+var __rest;
+var __decorate;
+var __param;
+var __esDecorate;
+var __runInitializers;
+var __propKey;
+var __setFunctionName;
+var __metadata;
+var __awaiter;
+var __generator;
+var __exportStar;
+var __values;
+var __read;
+var __spread;
+var __spreadArrays;
+var __spreadArray;
+var __await;
+var __asyncGenerator;
+var __asyncDelegator;
+var __asyncValues;
+var __makeTemplateObject;
+var __importStar;
+var __importDefault;
+var __classPrivateFieldGet;
+var __classPrivateFieldSet;
+var __classPrivateFieldIn;
+var __createBinding;
+var __addDisposableResource;
+var __disposeResources;
+var __rewriteRelativeImportExtension;
+(function (factory) {
+    var root = typeof global === "object" ? global : typeof self === "object" ? self : typeof this === "object" ? this : {};
+    if (typeof define === "function" && define.amd) {
+        define("tslib", ["exports"], function (exports) { factory(createExporter(root, createExporter(exports))); });
+    }
+    else if (typeof module === "object" && typeof module.exports === "object") {
+        factory(createExporter(root, createExporter(module.exports)));
+    }
+    else {
+        factory(createExporter(root));
+    }
+    function createExporter(exports, previous) {
+        if (exports !== root) {
+            if (typeof Object.create === "function") {
+                Object.defineProperty(exports, "__esModule", { value: true });
+            }
+            else {
+                exports.__esModule = true;
+            }
+        }
+        return function (id, v) { return exports[id] = previous ? previous(id, v) : v; };
+    }
+})
+(function (exporter) {
+    var extendStatics = Object.setPrototypeOf ||
+        ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
+        function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
+
+    __extends = function (d, b) {
+        if (typeof b !== "function" && b !== null)
+            throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
+        extendStatics(d, b);
+        function __() { this.constructor = d; }
+        d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+    };
+
+    __assign = Object.assign || function (t) {
+        for (var s, i = 1, n = arguments.length; i < n; i++) {
+            s = arguments[i];
+            for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p)) t[p] = s[p];
+        }
+        return t;
+    };
+
+    __rest = function (s, e) {
+        var t = {};
+        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0)
+            t[p] = s[p];
+        if (s != null && typeof Object.getOwnPropertySymbols === "function")
+            for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {
+                if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i]))
+                    t[p[i]] = s[p[i]];
+            }
+        return t;
+    };
+
+    __decorate = function (decorators, target, key, desc) {
+        var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+        if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+        else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+        return c > 3 && r && Object.defineProperty(target, key, r), r;
+    };
+
+    __param = function (paramIndex, decorator) {
+        return function (target, key) { decorator(target, key, paramIndex); }
+    };
+
+    __esDecorate = function (ctor, descriptorIn, decorators, contextIn, initializers, extraInitializers) {
+        function accept(f) { if (f !== void 0 && typeof f !== "function") throw new TypeError("Function expected"); return f; }
+        var kind = contextIn.kind, key = kind === "getter" ? "get" : kind === "setter" ? "set" : "value";
+        var target = !descriptorIn && ctor ? contextIn["static"] ? ctor : ctor.prototype : null;
+        var descriptor = descriptorIn || (target ? Object.getOwnPropertyDescriptor(target, contextIn.name) : {});
+        var _, done = false;
+        for (var i = decorators.length - 1; i >= 0; i--) {
+            var context = {};
+            for (var p in contextIn) context[p] = p === "access" ? {} : contextIn[p];
+            for (var p in contextIn.access) context.access[p] = contextIn.access[p];
+            context.addInitializer = function (f) { if (done) throw new TypeError("Cannot add initializers after decoration has completed"); extraInitializers.push(accept(f || null)); };
+            var result = (0, decorators[i])(kind === "accessor" ? { get: descriptor.get, set: descriptor.set } : descriptor[key], context);
+            if (kind === "accessor") {
+                if (result === void 0) continue;
+                if (result === null || typeof result !== "object") throw new TypeError("Object expected");
+                if (_ = accept(result.get)) descriptor.get = _;
+                if (_ = accept(result.set)) descriptor.set = _;
+                if (_ = accept(result.init)) initializers.unshift(_);
+            }
+            else if (_ = accept(result)) {
+                if (kind === "field") initializers.unshift(_);
+                else descriptor[key] = _;
+            }
+        }
+        if (target) Object.defineProperty(target, contextIn.name, descriptor);
+        done = true;
+    };
+
+    __runInitializers = function (thisArg, initializers, value) {
+        var useValue = arguments.length > 2;
+        for (var i = 0; i < initializers.length; i++) {
+            value = useValue ? initializers[i].call(thisArg, value) : initializers[i].call(thisArg);
+        }
+        return useValue ? value : void 0;
+    };
+
+    __propKey = function (x) {
+        return typeof x === "symbol" ? x : "".concat(x);
+    };
+
+    __setFunctionName = function (f, name, prefix) {
+        if (typeof name === "symbol") name = name.description ? "[".concat(name.description, "]") : "";
+        return Object.defineProperty(f, "name", { configurable: true, value: prefix ? "".concat(prefix, " ", name) : name });
+    };
+
+    __metadata = function (metadataKey, metadataValue) {
+        if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(metadataKey, metadataValue);
+    };
+
+    __awaiter = function (thisArg, _arguments, P, generator) {
+        function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
+        return new (P || (P = Promise))(function (resolve, reject) {
+            function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+            function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+            function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
+            step((generator = generator.apply(thisArg, _arguments || [])).next());
+        });
+    };
+
+    __generator = function (thisArg, body) {
+        var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype);
+        return g.next = verb(0), g["throw"] = verb(1), g["return"] = verb(2), typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
+        function verb(n) { return function (v) { return step([n, v]); }; }
+        function step(op) {
+            if (f) throw new TypeError("Generator is already executing.");
+            while (g && (g = 0, op[0] && (_ = 0)), _) try {
+                if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
+                if (y = 0, t) op = [op[0] & 2, t.value];
+                switch (op[0]) {
+                    case 0: case 1: t = op; break;
+                    case 4: _.label++; return { value: op[1], done: false };
+                    case 5: _.label++; y = op[1]; op = [0]; continue;
+                    case 7: op = _.ops.pop(); _.trys.pop(); continue;
+                    default:
+                        if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
+                        if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
+                        if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
+                        if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
+                        if (t[2]) _.ops.pop();
+                        _.trys.pop(); continue;
+                }
+                op = body.call(thisArg, _);
+            } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
+            if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
+        }
+    };
+
+    __exportStar = function(m, o) {
+        for (var p in m) if (p !== "default" && !Object.prototype.hasOwnProperty.call(o, p)) __createBinding(o, m, p);
+    };
+
+    __createBinding = Object.create ? (function(o, m, k, k2) {
+        if (k2 === undefined) k2 = k;
+        var desc = Object.getOwnPropertyDescriptor(m, k);
+        if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+            desc = { enumerable: true, get: function() { return m[k]; } };
+        }
+        Object.defineProperty(o, k2, desc);
+    }) : (function(o, m, k, k2) {
+        if (k2 === undefined) k2 = k;
+        o[k2] = m[k];
+    });
+
+    __values = function (o) {
+        var s = typeof Symbol === "function" && Symbol.iterator, m = s && o[s], i = 0;
+        if (m) return m.call(o);
+        if (o && typeof o.length === "number") return {
+            next: function () {
+                if (o && i >= o.length) o = void 0;
+                return { value: o && o[i++], done: !o };
+            }
+        };
+        throw new TypeError(s ? "Object is not iterable." : "Symbol.iterator is not defined.");
+    };
+
+    __read = function (o, n) {
+        var m = typeof Symbol === "function" && o[Symbol.iterator];
+        if (!m) return o;
+        var i = m.call(o), r, ar = [], e;
+        try {
+            while ((n === void 0 || n-- > 0) && !(r = i.next()).done) ar.push(r.value);
+        }
+        catch (error) { e = { error: error }; }
+        finally {
+            try {
+                if (r && !r.done && (m = i["return"])) m.call(i);
+            }
+            finally { if (e) throw e.error; }
+        }
+        return ar;
+    };
+
+    /** @deprecated */
+    __spread = function () {
+        for (var ar = [], i = 0; i < arguments.length; i++)
+            ar = ar.concat(__read(arguments[i]));
+        return ar;
+    };
+
+    /** @deprecated */
+    __spreadArrays = function () {
+        for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;
+        for (var r = Array(s), k = 0, i = 0; i < il; i++)
+            for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++)
+                r[k] = a[j];
+        return r;
+    };
+
+    __spreadArray = function (to, from, pack) {
+        if (pack || arguments.length === 2) for (var i = 0, l = from.length, ar; i < l; i++) {
+            if (ar || !(i in from)) {
+                if (!ar) ar = Array.prototype.slice.call(from, 0, i);
+                ar[i] = from[i];
+            }
+        }
+        return to.concat(ar || Array.prototype.slice.call(from));
+    };
+
+    __await = function (v) {
+        return this instanceof __await ? (this.v = v, this) : new __await(v);
+    };
+
+    __asyncGenerator = function (thisArg, _arguments, generator) {
+        if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
+        var g = generator.apply(thisArg, _arguments || []), i, q = [];
+        return i = Object.create((typeof AsyncIterator === "function" ? AsyncIterator : Object).prototype), verb("next"), verb("throw"), verb("return", awaitReturn), i[Symbol.asyncIterator] = function () { return this; }, i;
+        function awaitReturn(f) { return function (v) { return Promise.resolve(v).then(f, reject); }; }
+        function verb(n, f) { if (g[n]) { i[n] = function (v) { return new Promise(function (a, b) { q.push([n, v, a, b]) > 1 || resume(n, v); }); }; if (f) i[n] = f(i[n]); } }
+        function resume(n, v) { try { step(g[n](v)); } catch (e) { settle(q[0][3], e); } }
+        function step(r) { r.value instanceof __await ? Promise.resolve(r.value.v).then(fulfill, reject) : settle(q[0][2], r); }
+        function fulfill(value) { resume("next", value); }
+        function reject(value) { resume("throw", value); }
+        function settle(f, v) { if (f(v), q.shift(), q.length) resume(q[0][0], q[0][1]); }
+    };
+
+    __asyncDelegator = function (o) {
+        var i, p;
+        return i = {}, verb("next"), verb("throw", function (e) { throw e; }), verb("return"), i[Symbol.iterator] = function () { return this; }, i;
+        function verb(n, f) { i[n] = o[n] ? function (v) { return (p = !p) ? { value: __await(o[n](v)), done: false } : f ? f(v) : v; } : f; }
+    };
+
+    __asyncValues = function (o) {
+        if (!Symbol.asyncIterator) throw new TypeError("Symbol.asyncIterator is not defined.");
+        var m = o[Symbol.asyncIterator], i;
+        return m ? m.call(o) : (o = typeof __values === "function" ? __values(o) : o[Symbol.iterator](), i = {}, verb("next"), verb("throw"), verb("return"), i[Symbol.asyncIterator] = function () { return this; }, i);
+        function verb(n) { i[n] = o[n] && function (v) { return new Promise(function (resolve, reject) { v = o[n](v), settle(resolve, reject, v.done, v.value); }); }; }
+        function settle(resolve, reject, d, v) { Promise.resolve(v).then(function(v) { resolve({ value: v, done: d }); }, reject); }
+    };
+
+    __makeTemplateObject = function (cooked, raw) {
+        if (Object.defineProperty) { Object.defineProperty(cooked, "raw", { value: raw }); } else { cooked.raw = raw; }
+        return cooked;
+    };
+
+    var __setModuleDefault = Object.create ? (function(o, v) {
+        Object.defineProperty(o, "default", { enumerable: true, value: v });
+    }) : function(o, v) {
+        o["default"] = v;
+    };
+
+    var ownKeys = function(o) {
+        ownKeys = Object.getOwnPropertyNames || function (o) {
+            var ar = [];
+            for (var k in o) if (Object.prototype.hasOwnProperty.call(o, k)) ar[ar.length] = k;
+            return ar;
+        };
+        return ownKeys(o);
+    };
+
+    __importStar = function (mod) {
+        if (mod && mod.__esModule) return mod;
+        var result = {};
+        if (mod != null) for (var k = ownKeys(mod), i = 0; i < k.length; i++) if (k[i] !== "default") __createBinding(result, mod, k[i]);
+        __setModuleDefault(result, mod);
+        return result;
+    };
+
+    __importDefault = function (mod) {
+        return (mod && mod.__esModule) ? mod : { "default": mod };
+    };
+
+    __classPrivateFieldGet = function (receiver, state, kind, f) {
+        if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
+        if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
+        return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver);
+    };
+
+    __classPrivateFieldSet = function (receiver, state, value, kind, f) {
+        if (kind === "m") throw new TypeError("Private method is not writable");
+        if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a setter");
+        if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot write private member to an object whose class did not declare it");
+        return (kind === "a" ? f.call(receiver, value) : f ? f.value = value : state.set(receiver, value)), value;
+    };
+
+    __classPrivateFieldIn = function (state, receiver) {
+        if (receiver === null || (typeof receiver !== "object" && typeof receiver !== "function")) throw new TypeError("Cannot use 'in' operator on non-object");
+        return typeof state === "function" ? receiver === state : state.has(receiver);
+    };
+
+    __addDisposableResource = function (env, value, async) {
+        if (value !== null && value !== void 0) {
+            if (typeof value !== "object" && typeof value !== "function") throw new TypeError("Object expected.");
+            var dispose, inner;
+            if (async) {
+                if (!Symbol.asyncDispose) throw new TypeError("Symbol.asyncDispose is not defined.");
+                dispose = value[Symbol.asyncDispose];
+            }
+            if (dispose === void 0) {
+                if (!Symbol.dispose) throw new TypeError("Symbol.dispose is not defined.");
+                dispose = value[Symbol.dispose];
+                if (async) inner = dispose;
+            }
+            if (typeof dispose !== "function") throw new TypeError("Object not disposable.");
+            if (inner) dispose = function() { try { inner.call(this); } catch (e) { return Promise.reject(e); } };
+            env.stack.push({ value: value, dispose: dispose, async: async });
+        }
+        else if (async) {
+            env.stack.push({ async: true });
+        }
+        return value;
+    };
+
+    var _SuppressedError = typeof SuppressedError === "function" ? SuppressedError : function (error, suppressed, message) {
+        var e = new Error(message);
+        return e.name = "SuppressedError", e.error = error, e.suppressed = suppressed, e;
+    };
+
+    __disposeResources = function (env) {
+        function fail(e) {
+            env.error = env.hasError ? new _SuppressedError(e, env.error, "An error was suppressed during disposal.") : e;
+            env.hasError = true;
+        }
+        var r, s = 0;
+        function next() {
+            while (r = env.stack.pop()) {
+                try {
+                    if (!r.async && s === 1) return s = 0, env.stack.push(r), Promise.resolve().then(next);
+                    if (r.dispose) {
+                        var result = r.dispose.call(r.value);
+                        if (r.async) return s |= 2, Promise.resolve(result).then(next, function(e) { fail(e); return next(); });
+                    }
+                    else s |= 1;
+                }
+                catch (e) {
+                    fail(e);
+                }
+            }
+            if (s === 1) return env.hasError ? Promise.reject(env.error) : Promise.resolve();
+            if (env.hasError) throw env.error;
+        }
+        return next();
+    };
+
+    __rewriteRelativeImportExtension = function (path, preserveJsx) {
+        if (typeof path === "string" && /^\.\.?\//.test(path)) {
+            return path.replace(/\.(tsx)$|((?:\.d)?)((?:\.[^./]+?)?)\.([cm]?)ts$/i, function (m, tsx, d, ext, cm) {
+                return tsx ? preserveJsx ? ".jsx" : ".js" : d && (!ext || !cm) ? m : (d + ext + "." + cm.toLowerCase() + "js");
+            });
+        }
+        return path;
+    };
+
+    exporter("__extends", __extends);
+    exporter("__assign", __assign);
+    exporter("__rest", __rest);
+    exporter("__decorate", __decorate);
+    exporter("__param", __param);
+    exporter("__esDecorate", __esDecorate);
+    exporter("__runInitializers", __runInitializers);
+    exporter("__propKey", __propKey);
+    exporter("__setFunctionName", __setFunctionName);
+    exporter("__metadata", __metadata);
+    exporter("__awaiter", __awaiter);
+    exporter("__generator", __generator);
+    exporter("__exportStar", __exportStar);
+    exporter("__createBinding", __createBinding);
+    exporter("__values", __values);
+    exporter("__read", __read);
+    exporter("__spread", __spread);
+    exporter("__spreadArrays", __spreadArrays);
+    exporter("__spreadArray", __spreadArray);
+    exporter("__await", __await);
+    exporter("__asyncGenerator", __asyncGenerator);
+    exporter("__asyncDelegator", __asyncDelegator);
+    exporter("__asyncValues", __asyncValues);
+    exporter("__makeTemplateObject", __makeTemplateObject);
+    exporter("__importStar", __importStar);
+    exporter("__importDefault", __importDefault);
+    exporter("__classPrivateFieldGet", __classPrivateFieldGet);
+    exporter("__classPrivateFieldSet", __classPrivateFieldSet);
+    exporter("__classPrivateFieldIn", __classPrivateFieldIn);
+    exporter("__addDisposableResource", __addDisposableResource);
+    exporter("__disposeResources", __disposeResources);
+    exporter("__rewriteRelativeImportExtension", __rewriteRelativeImportExtension);
+});
+
+0 && (module.exports = {
+    __extends: __extends,
+    __assign: __assign,
+    __rest: __rest,
+    __decorate: __decorate,
+    __param: __param,
+    __esDecorate: __esDecorate,
+    __runInitializers: __runInitializers,
+    __propKey: __propKey,
+    __setFunctionName: __setFunctionName,
+    __metadata: __metadata,
+    __awaiter: __awaiter,
+    __generator: __generator,
+    __exportStar: __exportStar,
+    __createBinding: __createBinding,
+    __values: __values,
+    __read: __read,
+    __spread: __spread,
+    __spreadArrays: __spreadArrays,
+    __spreadArray: __spreadArray,
+    __await: __await,
+    __asyncGenerator: __asyncGenerator,
+    __asyncDelegator: __asyncDelegator,
+    __asyncValues: __asyncValues,
+    __makeTemplateObject: __makeTemplateObject,
+    __importStar: __importStar,
+    __importDefault: __importDefault,
+    __classPrivateFieldGet: __classPrivateFieldGet,
+    __classPrivateFieldSet: __classPrivateFieldSet,
+    __classPrivateFieldIn: __classPrivateFieldIn,
+    __addDisposableResource: __addDisposableResource,
+    __disposeResources: __disposeResources,
+    __rewriteRelativeImportExtension: __rewriteRelativeImportExtension,
+});
diff --git a/mqtt-backend/node_modules/typedarray/.travis.yml b/mqtt-backend/node_modules/typedarray/.travis.yml
new file mode 100644
index 0000000..cc4dba2
--- /dev/null
+++ b/mqtt-backend/node_modules/typedarray/.travis.yml
@@ -0,0 +1,4 @@
+language: node_js
+node_js:
+  - "0.8"
+  - "0.10"
diff --git a/mqtt-backend/node_modules/typedarray/LICENSE b/mqtt-backend/node_modules/typedarray/LICENSE
new file mode 100644
index 0000000..11adfae
--- /dev/null
+++ b/mqtt-backend/node_modules/typedarray/LICENSE
@@ -0,0 +1,35 @@
+/*
+ Copyright (c) 2010, Linden Research, Inc.
+ Copyright (c) 2012, Joshua Bell
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of this software and associated documentation files (the "Software"), to deal
+ in the Software without restriction, including without limitation the rights
+ to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ copies of the Software, and to permit persons to whom the Software is
+ furnished to do so, subject to the following conditions:
+
+ The above copyright notice and this permission notice shall be included in
+ all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+ $/LicenseInfo$
+ */
+
+// Original can be found at:
+//   https://bitbucket.org/lindenlab/llsd
+// Modifications by Joshua Bell inexorabletash@gmail.com
+//   https://github.com/inexorabletash/polyfill
+
+// ES3/ES5 implementation of the Krhonos Typed Array Specification
+//   Ref: http://www.khronos.org/registry/typedarray/specs/latest/
+//   Date: 2011-02-01
+//
+// Variations:
+//  * Allows typed_array.get/set() as alias for subscripts (typed_array[])
diff --git a/mqtt-backend/node_modules/typedarray/example/tarray.js b/mqtt-backend/node_modules/typedarray/example/tarray.js
new file mode 100644
index 0000000..8423d7c
--- /dev/null
+++ b/mqtt-backend/node_modules/typedarray/example/tarray.js
@@ -0,0 +1,4 @@
+var Uint8Array = require('../').Uint8Array;
+var ua = new Uint8Array(5);
+ua[1] = 256 + 55;
+console.log(ua[1]);
diff --git a/mqtt-backend/node_modules/typedarray/index.js b/mqtt-backend/node_modules/typedarray/index.js
new file mode 100644
index 0000000..5e54084
--- /dev/null
+++ b/mqtt-backend/node_modules/typedarray/index.js
@@ -0,0 +1,630 @@
+var undefined = (void 0); // Paranoia
+
+// Beyond this value, index getters/setters (i.e. array[0], array[1]) are so slow to
+// create, and consume so much memory, that the browser appears frozen.
+var MAX_ARRAY_LENGTH = 1e5;
+
+// Approximations of internal ECMAScript conversion functions
+var ECMAScript = (function() {
+  // Stash a copy in case other scripts modify these
+  var opts = Object.prototype.toString,
+      ophop = Object.prototype.hasOwnProperty;
+
+  return {
+    // Class returns internal [[Class]] property, used to avoid cross-frame instanceof issues:
+    Class: function(v) { return opts.call(v).replace(/^\[object *|\]$/g, ''); },
+    HasProperty: function(o, p) { return p in o; },
+    HasOwnProperty: function(o, p) { return ophop.call(o, p); },
+    IsCallable: function(o) { return typeof o === 'function'; },
+    ToInt32: function(v) { return v >> 0; },
+    ToUint32: function(v) { return v >>> 0; }
+  };
+}());
+
+// Snapshot intrinsics
+var LN2 = Math.LN2,
+    abs = Math.abs,
+    floor = Math.floor,
+    log = Math.log,
+    min = Math.min,
+    pow = Math.pow,
+    round = Math.round;
+
+// ES5: lock down object properties
+function configureProperties(obj) {
+  if (getOwnPropNames && defineProp) {
+    var props = getOwnPropNames(obj), i;
+    for (i = 0; i < props.length; i += 1) {
+      defineProp(obj, props[i], {
+        value: obj[props[i]],
+        writable: false,
+        enumerable: false,
+        configurable: false
+      });
+    }
+  }
+}
+
+// emulate ES5 getter/setter API using legacy APIs
+// http://blogs.msdn.com/b/ie/archive/2010/09/07/transitioning-existing-code-to-the-es5-getter-setter-apis.aspx
+// (second clause tests for Object.defineProperty() in IE<9 that only supports extending DOM prototypes, but
+// note that IE<9 does not support __defineGetter__ or __defineSetter__ so it just renders the method harmless)
+var defineProp
+if (Object.defineProperty && (function() {
+      try {
+        Object.defineProperty({}, 'x', {});
+        return true;
+      } catch (e) {
+        return false;
+      }
+    })()) {
+  defineProp = Object.defineProperty;
+} else {
+  defineProp = function(o, p, desc) {
+    if (!o === Object(o)) throw new TypeError("Object.defineProperty called on non-object");
+    if (ECMAScript.HasProperty(desc, 'get') && Object.prototype.__defineGetter__) { Object.prototype.__defineGetter__.call(o, p, desc.get); }
+    if (ECMAScript.HasProperty(desc, 'set') && Object.prototype.__defineSetter__) { Object.prototype.__defineSetter__.call(o, p, desc.set); }
+    if (ECMAScript.HasProperty(desc, 'value')) { o[p] = desc.value; }
+    return o;
+  };
+}
+
+var getOwnPropNames = Object.getOwnPropertyNames || function (o) {
+  if (o !== Object(o)) throw new TypeError("Object.getOwnPropertyNames called on non-object");
+  var props = [], p;
+  for (p in o) {
+    if (ECMAScript.HasOwnProperty(o, p)) {
+      props.push(p);
+    }
+  }
+  return props;
+};
+
+// ES5: Make obj[index] an alias for obj._getter(index)/obj._setter(index, value)
+// for index in 0 ... obj.length
+function makeArrayAccessors(obj) {
+  if (!defineProp) { return; }
+
+  if (obj.length > MAX_ARRAY_LENGTH) throw new RangeError("Array too large for polyfill");
+
+  function makeArrayAccessor(index) {
+    defineProp(obj, index, {
+      'get': function() { return obj._getter(index); },
+      'set': function(v) { obj._setter(index, v); },
+      enumerable: true,
+      configurable: false
+    });
+  }
+
+  var i;
+  for (i = 0; i < obj.length; i += 1) {
+    makeArrayAccessor(i);
+  }
+}
+
+// Internal conversion functions:
+//    pack<Type>()   - take a number (interpreted as Type), output a byte array
+//    unpack<Type>() - take a byte array, output a Type-like number
+
+function as_signed(value, bits) { var s = 32 - bits; return (value << s) >> s; }
+function as_unsigned(value, bits) { var s = 32 - bits; return (value << s) >>> s; }
+
+function packI8(n) { return [n & 0xff]; }
+function unpackI8(bytes) { return as_signed(bytes[0], 8); }
+
+function packU8(n) { return [n & 0xff]; }
+function unpackU8(bytes) { return as_unsigned(bytes[0], 8); }
+
+function packU8Clamped(n) { n = round(Number(n)); return [n < 0 ? 0 : n > 0xff ? 0xff : n & 0xff]; }
+
+function packI16(n) { return [(n >> 8) & 0xff, n & 0xff]; }
+function unpackI16(bytes) { return as_signed(bytes[0] << 8 | bytes[1], 16); }
+
+function packU16(n) { return [(n >> 8) & 0xff, n & 0xff]; }
+function unpackU16(bytes) { return as_unsigned(bytes[0] << 8 | bytes[1], 16); }
+
+function packI32(n) { return [(n >> 24) & 0xff, (n >> 16) & 0xff, (n >> 8) & 0xff, n & 0xff]; }
+function unpackI32(bytes) { return as_signed(bytes[0] << 24 | bytes[1] << 16 | bytes[2] << 8 | bytes[3], 32); }
+
+function packU32(n) { return [(n >> 24) & 0xff, (n >> 16) & 0xff, (n >> 8) & 0xff, n & 0xff]; }
+function unpackU32(bytes) { return as_unsigned(bytes[0] << 24 | bytes[1] << 16 | bytes[2] << 8 | bytes[3], 32); }
+
+function packIEEE754(v, ebits, fbits) {
+
+  var bias = (1 << (ebits - 1)) - 1,
+      s, e, f, ln,
+      i, bits, str, bytes;
+
+  function roundToEven(n) {
+    var w = floor(n), f = n - w;
+    if (f < 0.5)
+      return w;
+    if (f > 0.5)
+      return w + 1;
+    return w % 2 ? w + 1 : w;
+  }
+
+  // Compute sign, exponent, fraction
+  if (v !== v) {
+    // NaN
+    // http://dev.w3.org/2006/webapi/WebIDL/#es-type-mapping
+    e = (1 << ebits) - 1; f = pow(2, fbits - 1); s = 0;
+  } else if (v === Infinity || v === -Infinity) {
+    e = (1 << ebits) - 1; f = 0; s = (v < 0) ? 1 : 0;
+  } else if (v === 0) {
+    e = 0; f = 0; s = (1 / v === -Infinity) ? 1 : 0;
+  } else {
+    s = v < 0;
+    v = abs(v);
+
+    if (v >= pow(2, 1 - bias)) {
+      e = min(floor(log(v) / LN2), 1023);
+      f = roundToEven(v / pow(2, e) * pow(2, fbits));
+      if (f / pow(2, fbits) >= 2) {
+        e = e + 1;
+        f = 1;
+      }
+      if (e > bias) {
+        // Overflow
+        e = (1 << ebits) - 1;
+        f = 0;
+      } else {
+        // Normalized
+        e = e + bias;
+        f = f - pow(2, fbits);
+      }
+    } else {
+      // Denormalized
+      e = 0;
+      f = roundToEven(v / pow(2, 1 - bias - fbits));
+    }
+  }
+
+  // Pack sign, exponent, fraction
+  bits = [];
+  for (i = fbits; i; i -= 1) { bits.push(f % 2 ? 1 : 0); f = floor(f / 2); }
+  for (i = ebits; i; i -= 1) { bits.push(e % 2 ? 1 : 0); e = floor(e / 2); }
+  bits.push(s ? 1 : 0);
+  bits.reverse();
+  str = bits.join('');
+
+  // Bits to bytes
+  bytes = [];
+  while (str.length) {
+    bytes.push(parseInt(str.substring(0, 8), 2));
+    str = str.substring(8);
+  }
+  return bytes;
+}
+
+function unpackIEEE754(bytes, ebits, fbits) {
+
+  // Bytes to bits
+  var bits = [], i, j, b, str,
+      bias, s, e, f;
+
+  for (i = bytes.length; i; i -= 1) {
+    b = bytes[i - 1];
+    for (j = 8; j; j -= 1) {
+      bits.push(b % 2 ? 1 : 0); b = b >> 1;
+    }
+  }
+  bits.reverse();
+  str = bits.join('');
+
+  // Unpack sign, exponent, fraction
+  bias = (1 << (ebits - 1)) - 1;
+  s = parseInt(str.substring(0, 1), 2) ? -1 : 1;
+  e = parseInt(str.substring(1, 1 + ebits), 2);
+  f = parseInt(str.substring(1 + ebits), 2);
+
+  // Produce number
+  if (e === (1 << ebits) - 1) {
+    return f !== 0 ? NaN : s * Infinity;
+  } else if (e > 0) {
+    // Normalized
+    return s * pow(2, e - bias) * (1 + f / pow(2, fbits));
+  } else if (f !== 0) {
+    // Denormalized
+    return s * pow(2, -(bias - 1)) * (f / pow(2, fbits));
+  } else {
+    return s < 0 ? -0 : 0;
+  }
+}
+
+function unpackF64(b) { return unpackIEEE754(b, 11, 52); }
+function packF64(v) { return packIEEE754(v, 11, 52); }
+function unpackF32(b) { return unpackIEEE754(b, 8, 23); }
+function packF32(v) { return packIEEE754(v, 8, 23); }
+
+
+//
+// 3 The ArrayBuffer Type
+//
+
+(function() {
+
+  /** @constructor */
+  var ArrayBuffer = function ArrayBuffer(length) {
+    length = ECMAScript.ToInt32(length);
+    if (length < 0) throw new RangeError('ArrayBuffer size is not a small enough positive integer');
+
+    this.byteLength = length;
+    this._bytes = [];
+    this._bytes.length = length;
+
+    var i;
+    for (i = 0; i < this.byteLength; i += 1) {
+      this._bytes[i] = 0;
+    }
+
+    configureProperties(this);
+  };
+
+  exports.ArrayBuffer = exports.ArrayBuffer || ArrayBuffer;
+
+  //
+  // 4 The ArrayBufferView Type
+  //
+
+  // NOTE: this constructor is not exported
+  /** @constructor */
+  var ArrayBufferView = function ArrayBufferView() {
+    //this.buffer = null;
+    //this.byteOffset = 0;
+    //this.byteLength = 0;
+  };
+
+  //
+  // 5 The Typed Array View Types
+  //
+
+  function makeConstructor(bytesPerElement, pack, unpack) {
+    // Each TypedArray type requires a distinct constructor instance with
+    // identical logic, which this produces.
+
+    var ctor;
+    ctor = function(buffer, byteOffset, length) {
+      var array, sequence, i, s;
+
+      if (!arguments.length || typeof arguments[0] === 'number') {
+        // Constructor(unsigned long length)
+        this.length = ECMAScript.ToInt32(arguments[0]);
+        if (length < 0) throw new RangeError('ArrayBufferView size is not a small enough positive integer');
+
+        this.byteLength = this.length * this.BYTES_PER_ELEMENT;
+        this.buffer = new ArrayBuffer(this.byteLength);
+        this.byteOffset = 0;
+      } else if (typeof arguments[0] === 'object' && arguments[0].constructor === ctor) {
+        // Constructor(TypedArray array)
+        array = arguments[0];
+
+        this.length = array.length;
+        this.byteLength = this.length * this.BYTES_PER_ELEMENT;
+        this.buffer = new ArrayBuffer(this.byteLength);
+        this.byteOffset = 0;
+
+        for (i = 0; i < this.length; i += 1) {
+          this._setter(i, array._getter(i));
+        }
+      } else if (typeof arguments[0] === 'object' &&
+                 !(arguments[0] instanceof ArrayBuffer || ECMAScript.Class(arguments[0]) === 'ArrayBuffer')) {
+        // Constructor(sequence<type> array)
+        sequence = arguments[0];
+
+        this.length = ECMAScript.ToUint32(sequence.length);
+        this.byteLength = this.length * this.BYTES_PER_ELEMENT;
+        this.buffer = new ArrayBuffer(this.byteLength);
+        this.byteOffset = 0;
+
+        for (i = 0; i < this.length; i += 1) {
+          s = sequence[i];
+          this._setter(i, Number(s));
+        }
+      } else if (typeof arguments[0] === 'object' &&
+                 (arguments[0] instanceof ArrayBuffer || ECMAScript.Class(arguments[0]) === 'ArrayBuffer')) {
+        // Constructor(ArrayBuffer buffer,
+        //             optional unsigned long byteOffset, optional unsigned long length)
+        this.buffer = buffer;
+
+        this.byteOffset = ECMAScript.ToUint32(byteOffset);
+        if (this.byteOffset > this.buffer.byteLength) {
+          throw new RangeError("byteOffset out of range");
+        }
+
+        if (this.byteOffset % this.BYTES_PER_ELEMENT) {
+          // The given byteOffset must be a multiple of the element
+          // size of the specific type, otherwise an exception is raised.
+          throw new RangeError("ArrayBuffer length minus the byteOffset is not a multiple of the element size.");
+        }
+
+        if (arguments.length < 3) {
+          this.byteLength = this.buffer.byteLength - this.byteOffset;
+
+          if (this.byteLength % this.BYTES_PER_ELEMENT) {
+            throw new RangeError("length of buffer minus byteOffset not a multiple of the element size");
+          }
+          this.length = this.byteLength / this.BYTES_PER_ELEMENT;
+        } else {
+          this.length = ECMAScript.ToUint32(length);
+          this.byteLength = this.length * this.BYTES_PER_ELEMENT;
+        }
+
+        if ((this.byteOffset + this.byteLength) > this.buffer.byteLength) {
+          throw new RangeError("byteOffset and length reference an area beyond the end of the buffer");
+        }
+      } else {
+        throw new TypeError("Unexpected argument type(s)");
+      }
+
+      this.constructor = ctor;
+
+      configureProperties(this);
+      makeArrayAccessors(this);
+    };
+
+    ctor.prototype = new ArrayBufferView();
+    ctor.prototype.BYTES_PER_ELEMENT = bytesPerElement;
+    ctor.prototype._pack = pack;
+    ctor.prototype._unpack = unpack;
+    ctor.BYTES_PER_ELEMENT = bytesPerElement;
+
+    // getter type (unsigned long index);
+    ctor.prototype._getter = function(index) {
+      if (arguments.length < 1) throw new SyntaxError("Not enough arguments");
+
+      index = ECMAScript.ToUint32(index);
+      if (index >= this.length) {
+        return undefined;
+      }
+
+      var bytes = [], i, o;
+      for (i = 0, o = this.byteOffset + index * this.BYTES_PER_ELEMENT;
+           i < this.BYTES_PER_ELEMENT;
+           i += 1, o += 1) {
+        bytes.push(this.buffer._bytes[o]);
+      }
+      return this._unpack(bytes);
+    };
+
+    // NONSTANDARD: convenience alias for getter: type get(unsigned long index);
+    ctor.prototype.get = ctor.prototype._getter;
+
+    // setter void (unsigned long index, type value);
+    ctor.prototype._setter = function(index, value) {
+      if (arguments.length < 2) throw new SyntaxError("Not enough arguments");
+
+      index = ECMAScript.ToUint32(index);
+      if (index >= this.length) {
+        return undefined;
+      }
+
+      var bytes = this._pack(value), i, o;
+      for (i = 0, o = this.byteOffset + index * this.BYTES_PER_ELEMENT;
+           i < this.BYTES_PER_ELEMENT;
+           i += 1, o += 1) {
+        this.buffer._bytes[o] = bytes[i];
+      }
+    };
+
+    // void set(TypedArray array, optional unsigned long offset);
+    // void set(sequence<type> array, optional unsigned long offset);
+    ctor.prototype.set = function(index, value) {
+      if (arguments.length < 1) throw new SyntaxError("Not enough arguments");
+      var array, sequence, offset, len,
+          i, s, d,
+          byteOffset, byteLength, tmp;
+
+      if (typeof arguments[0] === 'object' && arguments[0].constructor === this.constructor) {
+        // void set(TypedArray array, optional unsigned long offset);
+        array = arguments[0];
+        offset = ECMAScript.ToUint32(arguments[1]);
+
+        if (offset + array.length > this.length) {
+          throw new RangeError("Offset plus length of array is out of range");
+        }
+
+        byteOffset = this.byteOffset + offset * this.BYTES_PER_ELEMENT;
+        byteLength = array.length * this.BYTES_PER_ELEMENT;
+
+        if (array.buffer === this.buffer) {
+          tmp = [];
+          for (i = 0, s = array.byteOffset; i < byteLength; i += 1, s += 1) {
+            tmp[i] = array.buffer._bytes[s];
+          }
+          for (i = 0, d = byteOffset; i < byteLength; i += 1, d += 1) {
+            this.buffer._bytes[d] = tmp[i];
+          }
+        } else {
+          for (i = 0, s = array.byteOffset, d = byteOffset;
+               i < byteLength; i += 1, s += 1, d += 1) {
+            this.buffer._bytes[d] = array.buffer._bytes[s];
+          }
+        }
+      } else if (typeof arguments[0] === 'object' && typeof arguments[0].length !== 'undefined') {
+        // void set(sequence<type> array, optional unsigned long offset);
+        sequence = arguments[0];
+        len = ECMAScript.ToUint32(sequence.length);
+        offset = ECMAScript.ToUint32(arguments[1]);
+
+        if (offset + len > this.length) {
+          throw new RangeError("Offset plus length of array is out of range");
+        }
+
+        for (i = 0; i < len; i += 1) {
+          s = sequence[i];
+          this._setter(offset + i, Number(s));
+        }
+      } else {
+        throw new TypeError("Unexpected argument type(s)");
+      }
+    };
+
+    // TypedArray subarray(long begin, optional long end);
+    ctor.prototype.subarray = function(start, end) {
+      function clamp(v, min, max) { return v < min ? min : v > max ? max : v; }
+
+      start = ECMAScript.ToInt32(start);
+      end = ECMAScript.ToInt32(end);
+
+      if (arguments.length < 1) { start = 0; }
+      if (arguments.length < 2) { end = this.length; }
+
+      if (start < 0) { start = this.length + start; }
+      if (end < 0) { end = this.length + end; }
+
+      start = clamp(start, 0, this.length);
+      end = clamp(end, 0, this.length);
+
+      var len = end - start;
+      if (len < 0) {
+        len = 0;
+      }
+
+      return new this.constructor(
+        this.buffer, this.byteOffset + start * this.BYTES_PER_ELEMENT, len);
+    };
+
+    return ctor;
+  }
+
+  var Int8Array = makeConstructor(1, packI8, unpackI8);
+  var Uint8Array = makeConstructor(1, packU8, unpackU8);
+  var Uint8ClampedArray = makeConstructor(1, packU8Clamped, unpackU8);
+  var Int16Array = makeConstructor(2, packI16, unpackI16);
+  var Uint16Array = makeConstructor(2, packU16, unpackU16);
+  var Int32Array = makeConstructor(4, packI32, unpackI32);
+  var Uint32Array = makeConstructor(4, packU32, unpackU32);
+  var Float32Array = makeConstructor(4, packF32, unpackF32);
+  var Float64Array = makeConstructor(8, packF64, unpackF64);
+
+  exports.Int8Array = exports.Int8Array || Int8Array;
+  exports.Uint8Array = exports.Uint8Array || Uint8Array;
+  exports.Uint8ClampedArray = exports.Uint8ClampedArray || Uint8ClampedArray;
+  exports.Int16Array = exports.Int16Array || Int16Array;
+  exports.Uint16Array = exports.Uint16Array || Uint16Array;
+  exports.Int32Array = exports.Int32Array || Int32Array;
+  exports.Uint32Array = exports.Uint32Array || Uint32Array;
+  exports.Float32Array = exports.Float32Array || Float32Array;
+  exports.Float64Array = exports.Float64Array || Float64Array;
+}());
+
+//
+// 6 The DataView View Type
+//
+
+(function() {
+  function r(array, index) {
+    return ECMAScript.IsCallable(array.get) ? array.get(index) : array[index];
+  }
+
+  var IS_BIG_ENDIAN = (function() {
+    var u16array = new(exports.Uint16Array)([0x1234]),
+        u8array = new(exports.Uint8Array)(u16array.buffer);
+    return r(u8array, 0) === 0x12;
+  }());
+
+  // Constructor(ArrayBuffer buffer,
+  //             optional unsigned long byteOffset,
+  //             optional unsigned long byteLength)
+  /** @constructor */
+  var DataView = function DataView(buffer, byteOffset, byteLength) {
+    if (arguments.length === 0) {
+      buffer = new exports.ArrayBuffer(0);
+    } else if (!(buffer instanceof exports.ArrayBuffer || ECMAScript.Class(buffer) === 'ArrayBuffer')) {
+      throw new TypeError("TypeError");
+    }
+
+    this.buffer = buffer || new exports.ArrayBuffer(0);
+
+    this.byteOffset = ECMAScript.ToUint32(byteOffset);
+    if (this.byteOffset > this.buffer.byteLength) {
+      throw new RangeError("byteOffset out of range");
+    }
+
+    if (arguments.length < 3) {
+      this.byteLength = this.buffer.byteLength - this.byteOffset;
+    } else {
+      this.byteLength = ECMAScript.ToUint32(byteLength);
+    }
+
+    if ((this.byteOffset + this.byteLength) > this.buffer.byteLength) {
+      throw new RangeError("byteOffset and length reference an area beyond the end of the buffer");
+    }
+
+    configureProperties(this);
+  };
+
+  function makeGetter(arrayType) {
+    return function(byteOffset, littleEndian) {
+
+      byteOffset = ECMAScript.ToUint32(byteOffset);
+
+      if (byteOffset + arrayType.BYTES_PER_ELEMENT > this.byteLength) {
+        throw new RangeError("Array index out of range");
+      }
+      byteOffset += this.byteOffset;
+
+      var uint8Array = new exports.Uint8Array(this.buffer, byteOffset, arrayType.BYTES_PER_ELEMENT),
+          bytes = [], i;
+      for (i = 0; i < arrayType.BYTES_PER_ELEMENT; i += 1) {
+        bytes.push(r(uint8Array, i));
+      }
+
+      if (Boolean(littleEndian) === Boolean(IS_BIG_ENDIAN)) {
+        bytes.reverse();
+      }
+
+      return r(new arrayType(new exports.Uint8Array(bytes).buffer), 0);
+    };
+  }
+
+  DataView.prototype.getUint8 = makeGetter(exports.Uint8Array);
+  DataView.prototype.getInt8 = makeGetter(exports.Int8Array);
+  DataView.prototype.getUint16 = makeGetter(exports.Uint16Array);
+  DataView.prototype.getInt16 = makeGetter(exports.Int16Array);
+  DataView.prototype.getUint32 = makeGetter(exports.Uint32Array);
+  DataView.prototype.getInt32 = makeGetter(exports.Int32Array);
+  DataView.prototype.getFloat32 = makeGetter(exports.Float32Array);
+  DataView.prototype.getFloat64 = makeGetter(exports.Float64Array);
+
+  function makeSetter(arrayType) {
+    return function(byteOffset, value, littleEndian) {
+
+      byteOffset = ECMAScript.ToUint32(byteOffset);
+      if (byteOffset + arrayType.BYTES_PER_ELEMENT > this.byteLength) {
+        throw new RangeError("Array index out of range");
+      }
+
+      // Get bytes
+      var typeArray = new arrayType([value]),
+          byteArray = new exports.Uint8Array(typeArray.buffer),
+          bytes = [], i, byteView;
+
+      for (i = 0; i < arrayType.BYTES_PER_ELEMENT; i += 1) {
+        bytes.push(r(byteArray, i));
+      }
+
+      // Flip if necessary
+      if (Boolean(littleEndian) === Boolean(IS_BIG_ENDIAN)) {
+        bytes.reverse();
+      }
+
+      // Write them
+      byteView = new exports.Uint8Array(this.buffer, byteOffset, arrayType.BYTES_PER_ELEMENT);
+      byteView.set(bytes);
+    };
+  }
+
+  DataView.prototype.setUint8 = makeSetter(exports.Uint8Array);
+  DataView.prototype.setInt8 = makeSetter(exports.Int8Array);
+  DataView.prototype.setUint16 = makeSetter(exports.Uint16Array);
+  DataView.prototype.setInt16 = makeSetter(exports.Int16Array);
+  DataView.prototype.setUint32 = makeSetter(exports.Uint32Array);
+  DataView.prototype.setInt32 = makeSetter(exports.Int32Array);
+  DataView.prototype.setFloat32 = makeSetter(exports.Float32Array);
+  DataView.prototype.setFloat64 = makeSetter(exports.Float64Array);
+
+  exports.DataView = exports.DataView || DataView;
+
+}());
diff --git a/mqtt-backend/node_modules/typedarray/package.json b/mqtt-backend/node_modules/typedarray/package.json
new file mode 100644
index 0000000..a7854a0
--- /dev/null
+++ b/mqtt-backend/node_modules/typedarray/package.json
@@ -0,0 +1,55 @@
+{
+  "name": "typedarray",
+  "version": "0.0.6",
+  "description": "TypedArray polyfill for old browsers",
+  "main": "index.js",
+  "devDependencies": {
+    "tape": "~2.3.2"
+  },
+  "scripts": {
+    "test": "tape test/*.js test/server/*.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/substack/typedarray.git"
+  },
+  "homepage": "https://github.com/substack/typedarray",
+  "keywords": [
+    "ArrayBuffer",
+    "DataView",
+    "Float32Array",
+    "Float64Array",
+    "Int8Array",
+    "Int16Array",
+    "Int32Array",
+    "Uint8Array",
+    "Uint8ClampedArray",
+    "Uint16Array",
+    "Uint32Array",
+    "typed",
+    "array",
+    "polyfill"
+  ],
+  "author": {
+    "name": "James Halliday",
+    "email": "mail@substack.net",
+    "url": "http://substack.net"
+  },
+  "license": "MIT",
+  "testling": {
+    "files": "test/*.js",
+    "browsers": [
+      "ie/6..latest",
+      "firefox/16..latest",
+      "firefox/nightly",
+      "chrome/22..latest",
+      "chrome/canary",
+      "opera/12..latest",
+      "opera/next",
+      "safari/5.1..latest",
+      "ipad/6.0..latest",
+      "iphone/6.0..latest",
+      "android-browser/4.2..latest"
+    ]
+  }
+}
diff --git a/mqtt-backend/node_modules/typedarray/readme.markdown b/mqtt-backend/node_modules/typedarray/readme.markdown
new file mode 100644
index 0000000..d18f6f7
--- /dev/null
+++ b/mqtt-backend/node_modules/typedarray/readme.markdown
@@ -0,0 +1,61 @@
+# typedarray
+
+TypedArray polyfill ripped from [this
+module](https://raw.github.com/inexorabletash/polyfill).
+
+[![build status](https://secure.travis-ci.org/substack/typedarray.png)](http://travis-ci.org/substack/typedarray)
+
+[![testling badge](https://ci.testling.com/substack/typedarray.png)](https://ci.testling.com/substack/typedarray)
+
+# example
+
+``` js
+var Uint8Array = require('typedarray').Uint8Array;
+var ua = new Uint8Array(5);
+ua[1] = 256 + 55;
+console.log(ua[1]);
+```
+
+output:
+
+```
+55
+```
+
+# methods
+
+``` js
+var TA = require('typedarray')
+```
+
+The `TA` object has the following constructors:
+
+* TA.ArrayBuffer
+* TA.DataView
+* TA.Float32Array
+* TA.Float64Array
+* TA.Int8Array
+* TA.Int16Array
+* TA.Int32Array
+* TA.Uint8Array
+* TA.Uint8ClampedArray
+* TA.Uint16Array
+* TA.Uint32Array
+
+# install
+
+With [npm](https://npmjs.org) do:
+
+```
+npm install typedarray
+```
+
+To use this module in the browser, compile with
+[browserify](http://browserify.org)
+or download a UMD build from browserify CDN:
+
+http://wzrd.in/standalone/typedarray@latest
+
+# license
+
+MIT
diff --git a/mqtt-backend/node_modules/typedarray/test/server/undef_globals.js b/mqtt-backend/node_modules/typedarray/test/server/undef_globals.js
new file mode 100644
index 0000000..425950f
--- /dev/null
+++ b/mqtt-backend/node_modules/typedarray/test/server/undef_globals.js
@@ -0,0 +1,19 @@
+var test = require('tape');
+var vm = require('vm');
+var fs = require('fs');
+var src = fs.readFileSync(__dirname + '/../../index.js', 'utf8');
+
+test('u8a without globals', function (t) {
+    var c = {
+        module: { exports: {} },
+    };
+    c.exports = c.module.exports;
+    vm.runInNewContext(src, c);
+    var TA = c.module.exports;
+    var ua = new(TA.Uint8Array)(5);
+    
+    t.equal(ua.length, 5);
+    ua[1] = 256 + 55;
+    t.equal(ua[1], 55);
+    t.end();
+});
diff --git a/mqtt-backend/node_modules/typedarray/test/tarray.js b/mqtt-backend/node_modules/typedarray/test/tarray.js
new file mode 100644
index 0000000..df596a3
--- /dev/null
+++ b/mqtt-backend/node_modules/typedarray/test/tarray.js
@@ -0,0 +1,10 @@
+var TA = require('../');
+var test = require('tape');
+
+test('tiny u8a test', function (t) {
+    var ua = new(TA.Uint8Array)(5);
+    t.equal(ua.length, 5);
+    ua[1] = 256 + 55;
+    t.equal(ua[1], 55);
+    t.end();
+});
diff --git a/mqtt-backend/node_modules/undici-types/LICENSE b/mqtt-backend/node_modules/undici-types/LICENSE
new file mode 100644
index 0000000..e7323bb
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) Matteo Collina and Undici contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/undici-types/README.md b/mqtt-backend/node_modules/undici-types/README.md
new file mode 100644
index 0000000..20a721c
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/README.md
@@ -0,0 +1,6 @@
+# undici-types
+
+This package is a dual-publish of the [undici](https://www.npmjs.com/package/undici) library types. The `undici` package **still contains types**. This package is for users who _only_ need undici types (such as for `@types/node`). It is published alongside every release of `undici`, so you can always use the same version.
+
+- [GitHub nodejs/undici](https://github.com/nodejs/undici)
+- [Undici Documentation](https://undici.nodejs.org/#/)
diff --git a/mqtt-backend/node_modules/undici-types/agent.d.ts b/mqtt-backend/node_modules/undici-types/agent.d.ts
new file mode 100644
index 0000000..b3b376d
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/agent.d.ts
@@ -0,0 +1,32 @@
+import { URL } from 'node:url'
+import Pool from './pool'
+import Dispatcher from './dispatcher'
+import TClientStats from './client-stats'
+import TPoolStats from './pool-stats'
+
+export default Agent
+
+declare class Agent extends Dispatcher {
+  constructor (opts?: Agent.Options)
+  /** `true` after `dispatcher.close()` has been called. */
+  closed: boolean
+  /** `true` after `dispatcher.destroyed()` has been called or `dispatcher.close()` has been called and the dispatcher shutdown has completed. */
+  destroyed: boolean
+  /** Dispatches a request. */
+  dispatch (options: Agent.DispatchOptions, handler: Dispatcher.DispatchHandler): boolean
+  /** Aggregate stats for a Agent by origin. */
+  readonly stats: Record<string, TClientStats | TPoolStats>
+}
+
+declare namespace Agent {
+  export interface Options extends Pool.Options {
+    /** Default: `(origin, opts) => new Pool(origin, opts)`. */
+    factory?(origin: string | URL, opts: Object): Dispatcher;
+
+    interceptors?: { Agent?: readonly Dispatcher.DispatchInterceptor[] } & Pool.Options['interceptors']
+    maxOrigins?: number
+  }
+
+  export interface DispatchOptions extends Dispatcher.DispatchOptions {
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/api.d.ts b/mqtt-backend/node_modules/undici-types/api.d.ts
new file mode 100644
index 0000000..b362b14
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/api.d.ts
@@ -0,0 +1,43 @@
+import { URL, UrlObject } from 'node:url'
+import { Duplex } from 'node:stream'
+import Dispatcher from './dispatcher'
+
+/** Performs an HTTP request. */
+declare function request<TOpaque = null> (
+  url: string | URL | UrlObject,
+  options?: { dispatcher?: Dispatcher } & Omit<Dispatcher.RequestOptions<TOpaque>, 'origin' | 'path' | 'method'> & Partial<Pick<Dispatcher.RequestOptions, 'method'>>,
+): Promise<Dispatcher.ResponseData<TOpaque>>
+
+/** A faster version of `request`. */
+declare function stream<TOpaque = null> (
+  url: string | URL | UrlObject,
+  options: { dispatcher?: Dispatcher } & Omit<Dispatcher.RequestOptions<TOpaque>, 'origin' | 'path'>,
+  factory: Dispatcher.StreamFactory<TOpaque>
+): Promise<Dispatcher.StreamData<TOpaque>>
+
+/** For easy use with `stream.pipeline`. */
+declare function pipeline<TOpaque = null> (
+  url: string | URL | UrlObject,
+  options: { dispatcher?: Dispatcher } & Omit<Dispatcher.PipelineOptions<TOpaque>, 'origin' | 'path'>,
+  handler: Dispatcher.PipelineHandler<TOpaque>
+): Duplex
+
+/** Starts two-way communications with the requested resource. */
+declare function connect<TOpaque = null> (
+  url: string | URL | UrlObject,
+  options?: { dispatcher?: Dispatcher } & Omit<Dispatcher.ConnectOptions<TOpaque>, 'origin' | 'path'>
+): Promise<Dispatcher.ConnectData<TOpaque>>
+
+/** Upgrade to a different protocol. */
+declare function upgrade (
+  url: string | URL | UrlObject,
+  options?: { dispatcher?: Dispatcher } & Omit<Dispatcher.UpgradeOptions, 'origin' | 'path'>
+): Promise<Dispatcher.UpgradeData>
+
+export {
+  request,
+  stream,
+  pipeline,
+  connect,
+  upgrade
+}
diff --git a/mqtt-backend/node_modules/undici-types/balanced-pool.d.ts b/mqtt-backend/node_modules/undici-types/balanced-pool.d.ts
new file mode 100644
index 0000000..1813e0c
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/balanced-pool.d.ts
@@ -0,0 +1,30 @@
+import Pool from './pool'
+import Dispatcher from './dispatcher'
+import { URL } from 'node:url'
+
+export default BalancedPool
+
+type BalancedPoolConnectOptions = Omit<Dispatcher.ConnectOptions, 'origin'>
+
+declare class BalancedPool extends Dispatcher {
+  constructor (url: string | string[] | URL | URL[], options?: Pool.Options)
+
+  addUpstream (upstream: string | URL): BalancedPool
+  removeUpstream (upstream: string | URL): BalancedPool
+  getUpstream (upstream: string | URL): Pool | undefined
+  upstreams: Array<string>
+
+  /** `true` after `pool.close()` has been called. */
+  closed: boolean
+  /** `true` after `pool.destroyed()` has been called or `pool.close()` has been called and the pool shutdown has completed. */
+  destroyed: boolean
+
+  // Override dispatcher APIs.
+  override connect (
+    options: BalancedPoolConnectOptions
+  ): Promise<Dispatcher.ConnectData>
+  override connect (
+    options: BalancedPoolConnectOptions,
+    callback: (err: Error | null, data: Dispatcher.ConnectData) => void
+  ): void
+}
diff --git a/mqtt-backend/node_modules/undici-types/cache-interceptor.d.ts b/mqtt-backend/node_modules/undici-types/cache-interceptor.d.ts
new file mode 100644
index 0000000..8588ccd
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/cache-interceptor.d.ts
@@ -0,0 +1,179 @@
+import { Readable, Writable } from 'node:stream'
+
+export default CacheHandler
+
+declare namespace CacheHandler {
+  export type CacheMethods = 'GET' | 'HEAD' | 'OPTIONS' | 'TRACE'
+
+  export interface CacheHandlerOptions {
+    store: CacheStore
+
+    cacheByDefault?: number
+
+    type?: CacheOptions['type']
+  }
+
+  export interface CacheOptions {
+    store?: CacheStore
+
+    /**
+     * The methods to cache
+     * Note we can only cache safe methods. Unsafe methods (i.e. PUT, POST)
+     *  invalidate the cache for a origin.
+     * @see https://www.rfc-editor.org/rfc/rfc9111.html#name-invalidating-stored-respons
+     * @see https://www.rfc-editor.org/rfc/rfc9110#section-9.2.1
+     */
+    methods?: CacheMethods[]
+
+    /**
+     * RFC9111 allows for caching responses that we aren't explicitly told to
+     *  cache or to not cache.
+     * @see https://www.rfc-editor.org/rfc/rfc9111.html#section-3-5
+     * @default undefined
+     */
+    cacheByDefault?: number
+
+    /**
+     * TODO docs
+     * @default 'shared'
+     */
+    type?: 'shared' | 'private'
+
+    /**
+     * Array of origins to cache. Only requests to these origins will be cached.
+     * Supports strings (case insensitive) and RegExp patterns.
+     * @default undefined (cache all origins)
+     */
+    origins?: (string | RegExp)[]
+  }
+
+  export interface CacheControlDirectives {
+    'max-stale'?: number;
+    'min-fresh'?: number;
+    'max-age'?: number;
+    's-maxage'?: number;
+    'stale-while-revalidate'?: number;
+    'stale-if-error'?: number;
+    public?: true;
+    private?: true | string[];
+    'no-store'?: true;
+    'no-cache'?: true | string[];
+    'must-revalidate'?: true;
+    'proxy-revalidate'?: true;
+    immutable?: true;
+    'no-transform'?: true;
+    'must-understand'?: true;
+    'only-if-cached'?: true;
+  }
+
+  export interface CacheKey {
+    origin: string
+    method: string
+    path: string
+    headers?: Record<string, string | string[]>
+  }
+
+  export interface CacheValue {
+    statusCode: number
+    statusMessage: string
+    headers: Record<string, string | string[]>
+    vary?: Record<string, string | string[] | null>
+    etag?: string
+    cacheControlDirectives?: CacheControlDirectives
+    cachedAt: number
+    staleAt: number
+    deleteAt: number
+  }
+
+  export interface DeleteByUri {
+    origin: string
+    method: string
+    path: string
+  }
+
+  type GetResult = {
+    statusCode: number
+    statusMessage: string
+    headers: Record<string, string | string[]>
+    vary?: Record<string, string | string[] | null>
+    etag?: string
+    body?: Readable | Iterable<Buffer> | AsyncIterable<Buffer> | Buffer | Iterable<string> | AsyncIterable<string> | string
+    cacheControlDirectives: CacheControlDirectives,
+    cachedAt: number
+    staleAt: number
+    deleteAt: number
+  }
+
+  /**
+   * Underlying storage provider for cached responses
+   */
+  export interface CacheStore {
+    get(key: CacheKey): GetResult | Promise<GetResult | undefined> | undefined
+
+    createWriteStream(key: CacheKey, val: CacheValue): Writable | undefined
+
+    delete(key: CacheKey): void | Promise<void>
+  }
+
+  export interface MemoryCacheStoreOpts {
+    /**
+       * @default Infinity
+       */
+    maxCount?: number
+
+    /**
+     * @default Infinity
+     */
+    maxSize?: number
+
+    /**
+     * @default Infinity
+     */
+    maxEntrySize?: number
+
+    errorCallback?: (err: Error) => void
+  }
+
+  export class MemoryCacheStore implements CacheStore {
+    constructor (opts?: MemoryCacheStoreOpts)
+
+    get (key: CacheKey): GetResult | Promise<GetResult | undefined> | undefined
+
+    createWriteStream (key: CacheKey, value: CacheValue): Writable | undefined
+
+    delete (key: CacheKey): void | Promise<void>
+  }
+
+  export interface SqliteCacheStoreOpts {
+    /**
+     * Location of the database
+     * @default ':memory:'
+     */
+    location?: string
+
+    /**
+     * @default Infinity
+     */
+    maxCount?: number
+
+    /**
+     * @default Infinity
+     */
+    maxEntrySize?: number
+  }
+
+  export class SqliteCacheStore implements CacheStore {
+    constructor (opts?: SqliteCacheStoreOpts)
+
+    /**
+     * Closes the connection to the database
+     */
+    close (): void
+
+    get (key: CacheKey): GetResult | Promise<GetResult | undefined> | undefined
+
+    createWriteStream (key: CacheKey, value: CacheValue): Writable | undefined
+
+    delete (key: CacheKey): void | Promise<void>
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/cache.d.ts b/mqtt-backend/node_modules/undici-types/cache.d.ts
new file mode 100644
index 0000000..4c33335
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/cache.d.ts
@@ -0,0 +1,36 @@
+import type { RequestInfo, Response, Request } from './fetch'
+
+export interface CacheStorage {
+  match (request: RequestInfo, options?: MultiCacheQueryOptions): Promise<Response | undefined>,
+  has (cacheName: string): Promise<boolean>,
+  open (cacheName: string): Promise<Cache>,
+  delete (cacheName: string): Promise<boolean>,
+  keys (): Promise<string[]>
+}
+
+declare const CacheStorage: {
+  prototype: CacheStorage
+  new(): CacheStorage
+}
+
+export interface Cache {
+  match (request: RequestInfo, options?: CacheQueryOptions): Promise<Response | undefined>,
+  matchAll (request?: RequestInfo, options?: CacheQueryOptions): Promise<readonly Response[]>,
+  add (request: RequestInfo): Promise<undefined>,
+  addAll (requests: RequestInfo[]): Promise<undefined>,
+  put (request: RequestInfo, response: Response): Promise<undefined>,
+  delete (request: RequestInfo, options?: CacheQueryOptions): Promise<boolean>,
+  keys (request?: RequestInfo, options?: CacheQueryOptions): Promise<readonly Request[]>
+}
+
+export interface CacheQueryOptions {
+  ignoreSearch?: boolean,
+  ignoreMethod?: boolean,
+  ignoreVary?: boolean
+}
+
+export interface MultiCacheQueryOptions extends CacheQueryOptions {
+  cacheName?: string
+}
+
+export declare const caches: CacheStorage
diff --git a/mqtt-backend/node_modules/undici-types/client-stats.d.ts b/mqtt-backend/node_modules/undici-types/client-stats.d.ts
new file mode 100644
index 0000000..ad9bd84
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/client-stats.d.ts
@@ -0,0 +1,15 @@
+import Client from './client'
+
+export default ClientStats
+
+declare class ClientStats {
+  constructor (pool: Client)
+  /** If socket has open connection. */
+  connected: boolean
+  /** Number of open socket connections in this client that do not have an active request. */
+  pending: number
+  /** Number of currently active requests of this client. */
+  running: number
+  /** Number of active, pending, or queued requests of this client. */
+  size: number
+}
diff --git a/mqtt-backend/node_modules/undici-types/client.d.ts b/mqtt-backend/node_modules/undici-types/client.d.ts
new file mode 100644
index 0000000..f5ccde2
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/client.d.ts
@@ -0,0 +1,118 @@
+import { URL } from 'node:url'
+import Dispatcher from './dispatcher'
+import buildConnector from './connector'
+import TClientStats from './client-stats'
+
+type ClientConnectOptions = Omit<Dispatcher.ConnectOptions, 'origin'>
+
+/**
+ * A basic HTTP/1.1 client, mapped on top a single TCP/TLS connection. Pipelining is disabled by default.
+ */
+export class Client extends Dispatcher {
+  constructor (url: string | URL, options?: Client.Options)
+  /** Property to get and set the pipelining factor. */
+  pipelining: number
+  /** `true` after `client.close()` has been called. */
+  closed: boolean
+  /** `true` after `client.destroyed()` has been called or `client.close()` has been called and the client shutdown has completed. */
+  destroyed: boolean
+  /** Aggregate stats for a Client. */
+  readonly stats: TClientStats
+
+  // Override dispatcher APIs.
+  override connect (
+    options: ClientConnectOptions
+  ): Promise<Dispatcher.ConnectData>
+  override connect (
+    options: ClientConnectOptions,
+    callback: (err: Error | null, data: Dispatcher.ConnectData) => void
+  ): void
+}
+
+export declare namespace Client {
+  export interface OptionsInterceptors {
+    Client: readonly Dispatcher.DispatchInterceptor[];
+  }
+  export interface Options {
+    /** TODO */
+    interceptors?: OptionsInterceptors;
+    /** The maximum length of request headers in bytes. Default: Node.js' `--max-http-header-size` or `16384` (16KiB). */
+    maxHeaderSize?: number;
+    /** The amount of time, in milliseconds, the parser will wait to receive the complete HTTP headers (Node 14 and above only). Default: `300e3` milliseconds (300s). */
+    headersTimeout?: number;
+    /** @deprecated unsupported socketTimeout, use headersTimeout & bodyTimeout instead */
+    socketTimeout?: never;
+    /** @deprecated unsupported requestTimeout, use headersTimeout & bodyTimeout instead */
+    requestTimeout?: never;
+    /** TODO */
+    connectTimeout?: number;
+    /** The timeout after which a request will time out, in milliseconds. Monitors time between receiving body data. Use `0` to disable it entirely. Default: `300e3` milliseconds (300s). */
+    bodyTimeout?: number;
+    /** @deprecated unsupported idleTimeout, use keepAliveTimeout instead */
+    idleTimeout?: never;
+    /** @deprecated unsupported keepAlive, use pipelining=0 instead */
+    keepAlive?: never;
+    /** the timeout, in milliseconds, after which a socket without active requests will time out. Monitors time between activity on a connected socket. This value may be overridden by *keep-alive* hints from the server. Default: `4e3` milliseconds (4s). */
+    keepAliveTimeout?: number;
+    /** @deprecated unsupported maxKeepAliveTimeout, use keepAliveMaxTimeout instead */
+    maxKeepAliveTimeout?: never;
+    /** the maximum allowed `idleTimeout`, in milliseconds, when overridden by *keep-alive* hints from the server. Default: `600e3` milliseconds (10min). */
+    keepAliveMaxTimeout?: number;
+    /** A number of milliseconds subtracted from server *keep-alive* hints when overriding `idleTimeout` to account for timing inaccuracies caused by e.g. transport latency. Default: `1e3` milliseconds (1s). */
+    keepAliveTimeoutThreshold?: number;
+    /** TODO */
+    socketPath?: string;
+    /** The amount of concurrent requests to be sent over the single TCP/TLS connection according to [RFC7230](https://tools.ietf.org/html/rfc7230#section-6.3.2). Default: `1`. */
+    pipelining?: number;
+    /** @deprecated use the connect option instead */
+    tls?: never;
+    /** If `true`, an error is thrown when the request content-length header doesn't match the length of the request body. Default: `true`. */
+    strictContentLength?: boolean;
+    /** TODO */
+    maxCachedSessions?: number;
+    /** TODO */
+    connect?: Partial<buildConnector.BuildOptions> | buildConnector.connector;
+    /** TODO */
+    maxRequestsPerClient?: number;
+    /** TODO */
+    localAddress?: string;
+    /** Max response body size in bytes, -1 is disabled */
+    maxResponseSize?: number;
+    /** Enables a family autodetection algorithm that loosely implements section 5 of RFC 8305. */
+    autoSelectFamily?: boolean;
+    /** The amount of time in milliseconds to wait for a connection attempt to finish before trying the next address when using the `autoSelectFamily` option. */
+    autoSelectFamilyAttemptTimeout?: number;
+    /**
+     * @description Enables support for H2 if the server has assigned bigger priority to it through ALPN negotiation.
+     * @default false
+     */
+    allowH2?: boolean;
+    /**
+     * @description Dictates the maximum number of concurrent streams for a single H2 session. It can be overridden by a SETTINGS remote frame.
+     * @default 100
+     */
+    maxConcurrentStreams?: number;
+    /**
+     * @description Sets the HTTP/2 stream-level flow-control window size (SETTINGS_INITIAL_WINDOW_SIZE).
+     * @default 262144
+     */
+    initialWindowSize?: number;
+    /**
+     * @description Sets the HTTP/2 connection-level flow-control window size (ClientHttp2Session.setLocalWindowSize).
+     * @default 524288
+     */
+    connectionWindowSize?: number;
+  }
+  export interface SocketInfo {
+    localAddress?: string
+    localPort?: number
+    remoteAddress?: string
+    remotePort?: number
+    remoteFamily?: string
+    timeout?: number
+    bytesWritten?: number
+    bytesRead?: number
+  }
+}
+
+export default Client
diff --git a/mqtt-backend/node_modules/undici-types/connector.d.ts b/mqtt-backend/node_modules/undici-types/connector.d.ts
new file mode 100644
index 0000000..3376df7
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/connector.d.ts
@@ -0,0 +1,34 @@
+import { TLSSocket, ConnectionOptions } from 'node:tls'
+import { IpcNetConnectOpts, Socket, TcpNetConnectOpts } from 'node:net'
+
+export default buildConnector
+declare function buildConnector (options?: buildConnector.BuildOptions): buildConnector.connector
+
+declare namespace buildConnector {
+  export type BuildOptions = (ConnectionOptions | TcpNetConnectOpts | IpcNetConnectOpts) & {
+    allowH2?: boolean;
+    maxCachedSessions?: number | null;
+    socketPath?: string | null;
+    timeout?: number | null;
+    port?: number;
+    keepAlive?: boolean | null;
+    keepAliveInitialDelay?: number | null;
+  }
+
+  export interface Options {
+    hostname: string
+    host?: string
+    protocol: string
+    port: string
+    servername?: string
+    localAddress?: string | null
+    httpSocket?: Socket
+  }
+
+  export type Callback = (...args: CallbackArgs) => void
+  type CallbackArgs = [null, Socket | TLSSocket] | [Error, null]
+
+  export interface connector {
+    (options: buildConnector.Options, callback: buildConnector.Callback): void
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/content-type.d.ts b/mqtt-backend/node_modules/undici-types/content-type.d.ts
new file mode 100644
index 0000000..f2a87f1
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/content-type.d.ts
@@ -0,0 +1,21 @@
+/// <reference types="node" />
+
+interface MIMEType {
+  type: string
+  subtype: string
+  parameters: Map<string, string>
+  essence: string
+}
+
+/**
+ * Parse a string to a {@link MIMEType} object. Returns `failure` if the string
+ * couldn't be parsed.
+ * @see https://mimesniff.spec.whatwg.org/#parse-a-mime-type
+ */
+export function parseMIMEType (input: string): 'failure' | MIMEType
+
+/**
+ * Convert a MIMEType object to a string.
+ * @see https://mimesniff.spec.whatwg.org/#serialize-a-mime-type
+ */
+export function serializeAMimeType (mimeType: MIMEType): string
diff --git a/mqtt-backend/node_modules/undici-types/cookies.d.ts b/mqtt-backend/node_modules/undici-types/cookies.d.ts
new file mode 100644
index 0000000..f746d35
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/cookies.d.ts
@@ -0,0 +1,30 @@
+/// <reference types="node" />
+
+import type { Headers } from './fetch'
+
+export interface Cookie {
+  name: string
+  value: string
+  expires?: Date | number
+  maxAge?: number
+  domain?: string
+  path?: string
+  secure?: boolean
+  httpOnly?: boolean
+  sameSite?: 'Strict' | 'Lax' | 'None'
+  unparsed?: string[]
+}
+
+export function deleteCookie (
+  headers: Headers,
+  name: string,
+  attributes?: { name?: string, domain?: string }
+): void
+
+export function getCookies (headers: Headers): Record<string, string>
+
+export function getSetCookies (headers: Headers): Cookie[]
+
+export function setCookie (headers: Headers, cookie: Cookie): void
+
+export function parseCookie (cookie: string): Cookie | null
diff --git a/mqtt-backend/node_modules/undici-types/diagnostics-channel.d.ts b/mqtt-backend/node_modules/undici-types/diagnostics-channel.d.ts
new file mode 100644
index 0000000..3c6a529
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/diagnostics-channel.d.ts
@@ -0,0 +1,74 @@
+import { Socket } from 'node:net'
+import { URL } from 'node:url'
+import buildConnector from './connector'
+import Dispatcher from './dispatcher'
+
+declare namespace DiagnosticsChannel {
+  interface Request {
+    origin?: string | URL;
+    completed: boolean;
+    method?: Dispatcher.HttpMethod;
+    path: string;
+    headers: any;
+  }
+  interface Response {
+    statusCode: number;
+    statusText: string;
+    headers: Array<Buffer>;
+  }
+  interface ConnectParams {
+    host: URL['host'];
+    hostname: URL['hostname'];
+    protocol: URL['protocol'];
+    port: URL['port'];
+    servername: string | null;
+  }
+  type Connector = buildConnector.connector
+  export interface RequestCreateMessage {
+    request: Request;
+  }
+  export interface RequestBodySentMessage {
+    request: Request;
+  }
+
+  export interface RequestBodyChunkSentMessage {
+    request: Request;
+    chunk: Uint8Array | string;
+  }
+  export interface RequestBodyChunkReceivedMessage {
+    request: Request;
+    chunk: Buffer;
+  }
+  export interface RequestHeadersMessage {
+    request: Request;
+    response: Response;
+  }
+  export interface RequestTrailersMessage {
+    request: Request;
+    trailers: Array<Buffer>;
+  }
+  export interface RequestErrorMessage {
+    request: Request;
+    error: Error;
+  }
+  export interface ClientSendHeadersMessage {
+    request: Request;
+    headers: string;
+    socket: Socket;
+  }
+  export interface ClientBeforeConnectMessage {
+    connectParams: ConnectParams;
+    connector: Connector;
+  }
+  export interface ClientConnectedMessage {
+    socket: Socket;
+    connectParams: ConnectParams;
+    connector: Connector;
+  }
+  export interface ClientConnectErrorMessage {
+    error: Error;
+    socket: Socket;
+    connectParams: ConnectParams;
+    connector: Connector;
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/dispatcher.d.ts b/mqtt-backend/node_modules/undici-types/dispatcher.d.ts
new file mode 100644
index 0000000..13b33ec
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/dispatcher.d.ts
@@ -0,0 +1,276 @@
+import { URL } from 'node:url'
+import { Duplex, Readable, Writable } from 'node:stream'
+import { EventEmitter } from 'node:events'
+import { Blob } from 'node:buffer'
+import { IncomingHttpHeaders } from './header'
+import BodyReadable from './readable'
+import { FormData } from './formdata'
+import Errors from './errors'
+import { Autocomplete } from './utility'
+
+type AbortSignal = unknown
+
+export default Dispatcher
+
+export type UndiciHeaders = Record<string, string | string[]> | IncomingHttpHeaders | string[] | Iterable<[string, string | string[] | undefined]> | null
+
+/** Dispatcher is the core API used to dispatch requests. */
+declare class Dispatcher extends EventEmitter {
+  /** Dispatches a request. This API is expected to evolve through semver-major versions and is less stable than the preceding higher level APIs. It is primarily intended for library developers who implement higher level APIs on top of this. */
+  dispatch (options: Dispatcher.DispatchOptions, handler: Dispatcher.DispatchHandler): boolean
+  /** Starts two-way communications with the requested resource. */
+  connect<TOpaque = null>(options: Dispatcher.ConnectOptions<TOpaque>, callback: (err: Error | null, data: Dispatcher.ConnectData<TOpaque>) => void): void
+  connect<TOpaque = null>(options: Dispatcher.ConnectOptions<TOpaque>): Promise<Dispatcher.ConnectData<TOpaque>>
+  /** Compose a chain of dispatchers */
+  compose (dispatchers: Dispatcher.DispatcherComposeInterceptor[]): Dispatcher.ComposedDispatcher
+  compose (...dispatchers: Dispatcher.DispatcherComposeInterceptor[]): Dispatcher.ComposedDispatcher
+  /** Performs an HTTP request. */
+  request<TOpaque = null>(options: Dispatcher.RequestOptions<TOpaque>, callback: (err: Error | null, data: Dispatcher.ResponseData<TOpaque>) => void): void
+  request<TOpaque = null>(options: Dispatcher.RequestOptions<TOpaque>): Promise<Dispatcher.ResponseData<TOpaque>>
+  /** For easy use with `stream.pipeline`. */
+  pipeline<TOpaque = null>(options: Dispatcher.PipelineOptions<TOpaque>, handler: Dispatcher.PipelineHandler<TOpaque>): Duplex
+  /** A faster version of `Dispatcher.request`. */
+  stream<TOpaque = null>(options: Dispatcher.RequestOptions<TOpaque>, factory: Dispatcher.StreamFactory<TOpaque>, callback: (err: Error | null, data: Dispatcher.StreamData<TOpaque>) => void): void
+  stream<TOpaque = null>(options: Dispatcher.RequestOptions<TOpaque>, factory: Dispatcher.StreamFactory<TOpaque>): Promise<Dispatcher.StreamData<TOpaque>>
+  /** Upgrade to a different protocol. */
+  upgrade (options: Dispatcher.UpgradeOptions, callback: (err: Error | null, data: Dispatcher.UpgradeData) => void): void
+  upgrade (options: Dispatcher.UpgradeOptions): Promise<Dispatcher.UpgradeData>
+  /** Closes the client and gracefully waits for enqueued requests to complete before invoking the callback (or returning a promise if no callback is provided). */
+  close (callback: () => void): void
+  close (): Promise<void>
+  /** Destroy the client abruptly with the given err. All the pending and running requests will be asynchronously aborted and error. Waits until socket is closed before invoking the callback (or returning a promise if no callback is provided). Since this operation is asynchronously dispatched there might still be some progress on dispatched requests. */
+  destroy (err: Error | null, callback: () => void): void
+  destroy (callback: () => void): void
+  destroy (err: Error | null): Promise<void>
+  destroy (): Promise<void>
+
+  on (eventName: 'connect', callback: (origin: URL, targets: readonly Dispatcher[]) => void): this
+  on (eventName: 'disconnect', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  on (eventName: 'connectionError', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  on (eventName: 'drain', callback: (origin: URL) => void): this
+
+  once (eventName: 'connect', callback: (origin: URL, targets: readonly Dispatcher[]) => void): this
+  once (eventName: 'disconnect', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  once (eventName: 'connectionError', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  once (eventName: 'drain', callback: (origin: URL) => void): this
+
+  off (eventName: 'connect', callback: (origin: URL, targets: readonly Dispatcher[]) => void): this
+  off (eventName: 'disconnect', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  off (eventName: 'connectionError', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  off (eventName: 'drain', callback: (origin: URL) => void): this
+
+  addListener (eventName: 'connect', callback: (origin: URL, targets: readonly Dispatcher[]) => void): this
+  addListener (eventName: 'disconnect', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  addListener (eventName: 'connectionError', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  addListener (eventName: 'drain', callback: (origin: URL) => void): this
+
+  removeListener (eventName: 'connect', callback: (origin: URL, targets: readonly Dispatcher[]) => void): this
+  removeListener (eventName: 'disconnect', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  removeListener (eventName: 'connectionError', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  removeListener (eventName: 'drain', callback: (origin: URL) => void): this
+
+  prependListener (eventName: 'connect', callback: (origin: URL, targets: readonly Dispatcher[]) => void): this
+  prependListener (eventName: 'disconnect', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  prependListener (eventName: 'connectionError', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  prependListener (eventName: 'drain', callback: (origin: URL) => void): this
+
+  prependOnceListener (eventName: 'connect', callback: (origin: URL, targets: readonly Dispatcher[]) => void): this
+  prependOnceListener (eventName: 'disconnect', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  prependOnceListener (eventName: 'connectionError', callback: (origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void): this
+  prependOnceListener (eventName: 'drain', callback: (origin: URL) => void): this
+
+  listeners (eventName: 'connect'): ((origin: URL, targets: readonly Dispatcher[]) => void)[]
+  listeners (eventName: 'disconnect'): ((origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void)[]
+  listeners (eventName: 'connectionError'): ((origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void)[]
+  listeners (eventName: 'drain'): ((origin: URL) => void)[]
+
+  rawListeners (eventName: 'connect'): ((origin: URL, targets: readonly Dispatcher[]) => void)[]
+  rawListeners (eventName: 'disconnect'): ((origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void)[]
+  rawListeners (eventName: 'connectionError'): ((origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError) => void)[]
+  rawListeners (eventName: 'drain'): ((origin: URL) => void)[]
+
+  emit (eventName: 'connect', origin: URL, targets: readonly Dispatcher[]): boolean
+  emit (eventName: 'disconnect', origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError): boolean
+  emit (eventName: 'connectionError', origin: URL, targets: readonly Dispatcher[], error: Errors.UndiciError): boolean
+  emit (eventName: 'drain', origin: URL): boolean
+}
+
+declare namespace Dispatcher {
+  export interface ComposedDispatcher extends Dispatcher {}
+  export type Dispatch = Dispatcher['dispatch']
+  export type DispatcherComposeInterceptor = (dispatch: Dispatch) => Dispatch
+  export interface DispatchOptions {
+    origin?: string | URL;
+    path: string;
+    method: HttpMethod;
+    /** Default: `null` */
+    body?: string | Buffer | Uint8Array | Readable | null | FormData;
+    /** Default: `null` */
+    headers?: UndiciHeaders;
+    /** Query string params to be embedded in the request URL. Default: `null` */
+    query?: Record<string, any>;
+    /** Whether the requests can be safely retried or not. If `false` the request won't be sent until all preceding requests in the pipeline have completed. Default: `true` if `method` is `HEAD` or `GET`. */
+    idempotent?: boolean;
+    /** Whether the response is expected to take a long time and would end up blocking the pipeline. When this is set to `true` further pipelining will be avoided on the same connection until headers have been received. Defaults to `method !== 'HEAD'`. */
+    blocking?: boolean;
+    /** Upgrade the request. Should be used to specify the kind of upgrade i.e. `'Websocket'`. Default: `method === 'CONNECT' || null`. */
+    upgrade?: boolean | string | null;
+    /** The amount of time, in milliseconds, the parser will wait to receive the complete HTTP headers. Defaults to 300 seconds. */
+    headersTimeout?: number | null;
+    /** The timeout after which a request will time out, in milliseconds. Monitors time between receiving body data. Use 0 to disable it entirely. Defaults to 300 seconds. */
+    bodyTimeout?: number | null;
+    /** Whether the request should stablish a keep-alive or not. Default `false` */
+    reset?: boolean;
+    /** Whether Undici should throw an error upon receiving a 4xx or 5xx response from the server. Defaults to false */
+    throwOnError?: boolean;
+    /** For H2, it appends the expect: 100-continue header, and halts the request body until a 100-continue is received from the remote server */
+    expectContinue?: boolean;
+  }
+  export interface ConnectOptions<TOpaque = null> {
+    origin: string | URL;
+    path: string;
+    /** Default: `null` */
+    headers?: UndiciHeaders;
+    /** Default: `null` */
+    signal?: AbortSignal | EventEmitter | null;
+    /** This argument parameter is passed through to `ConnectData` */
+    opaque?: TOpaque;
+    /** Default: false */
+    redirectionLimitReached?: boolean;
+    /** Default: `null` */
+    responseHeaders?: 'raw' | null;
+  }
+  export interface RequestOptions<TOpaque = null> extends DispatchOptions {
+    /** Default: `null` */
+    opaque?: TOpaque;
+    /** Default: `null` */
+    signal?: AbortSignal | EventEmitter | null;
+    /** Default: false */
+    redirectionLimitReached?: boolean;
+    /** Default: `null` */
+    onInfo?: (info: { statusCode: number, headers: Record<string, string | string[]> }) => void;
+    /** Default: `null` */
+    responseHeaders?: 'raw' | null;
+    /** Default: `64 KiB` */
+    highWaterMark?: number;
+  }
+  export interface PipelineOptions<TOpaque = null> extends RequestOptions<TOpaque> {
+    /** `true` if the `handler` will return an object stream. Default: `false` */
+    objectMode?: boolean;
+  }
+  export interface UpgradeOptions {
+    path: string;
+    /** Default: `'GET'` */
+    method?: string;
+    /** Default: `null` */
+    headers?: UndiciHeaders;
+    /** A string of comma separated protocols, in descending preference order. Default: `'Websocket'` */
+    protocol?: string;
+    /** Default: `null` */
+    signal?: AbortSignal | EventEmitter | null;
+    /** Default: false */
+    redirectionLimitReached?: boolean;
+    /** Default: `null` */
+    responseHeaders?: 'raw' | null;
+  }
+  export interface ConnectData<TOpaque = null> {
+    statusCode: number;
+    headers: IncomingHttpHeaders;
+    socket: Duplex;
+    opaque: TOpaque;
+  }
+  export interface ResponseData<TOpaque = null> {
+    statusCode: number;
+    headers: IncomingHttpHeaders;
+    body: BodyReadable & BodyMixin;
+    trailers: Record<string, string>;
+    opaque: TOpaque;
+    context: object;
+  }
+  export interface PipelineHandlerData<TOpaque = null> {
+    statusCode: number;
+    headers: IncomingHttpHeaders;
+    opaque: TOpaque;
+    body: BodyReadable;
+    context: object;
+  }
+  export interface StreamData<TOpaque = null> {
+    opaque: TOpaque;
+    trailers: Record<string, string>;
+  }
+  export interface UpgradeData<TOpaque = null> {
+    headers: IncomingHttpHeaders;
+    socket: Duplex;
+    opaque: TOpaque;
+  }
+  export interface StreamFactoryData<TOpaque = null> {
+    statusCode: number;
+    headers: IncomingHttpHeaders;
+    opaque: TOpaque;
+    context: object;
+  }
+  export type StreamFactory<TOpaque = null> = (data: StreamFactoryData<TOpaque>) => Writable
+
+  export interface DispatchController {
+    get aborted () : boolean
+    get paused () : boolean
+    get reason () : Error | null
+    abort (reason: Error): void
+    pause(): void
+    resume(): void
+  }
+
+  export interface DispatchHandler {
+    onRequestStart?(controller: DispatchController, context: any): void;
+    onRequestUpgrade?(controller: DispatchController, statusCode: number, headers: IncomingHttpHeaders, socket: Duplex): void;
+    onResponseStart?(controller: DispatchController, statusCode: number, headers: IncomingHttpHeaders, statusMessage?: string): void;
+    onResponseData?(controller: DispatchController, chunk: Buffer): void;
+    onResponseEnd?(controller: DispatchController, trailers: IncomingHttpHeaders): void;
+    onResponseError?(controller: DispatchController, error: Error): void;
+
+    /** Invoked before request is dispatched on socket. May be invoked multiple times when a request is retried when the request at the head of the pipeline fails. */
+    /** @deprecated */
+    onConnect?(abort: (err?: Error) => void): void;
+    /** Invoked when an error has occurred. */
+    /** @deprecated */
+    onError?(err: Error): void;
+    /** Invoked when request is upgraded either due to a `Upgrade` header or `CONNECT` method. */
+    /** @deprecated */
+    onUpgrade?(statusCode: number, headers: Buffer[] | string[] | null, socket: Duplex): void;
+    /** Invoked when response is received, before headers have been read. **/
+    /** @deprecated */
+    onResponseStarted?(): void;
+    /** Invoked when statusCode and headers have been received. May be invoked multiple times due to 1xx informational headers. */
+    /** @deprecated */
+    onHeaders?(statusCode: number, headers: Buffer[], resume: () => void, statusText: string): boolean;
+    /** Invoked when response payload data is received. */
+    /** @deprecated */
+    onData?(chunk: Buffer): boolean;
+    /** Invoked when response payload and trailers have been received and the request has completed. */
+    /** @deprecated */
+    onComplete?(trailers: string[] | null): void;
+    /** Invoked when a body chunk is sent to the server. May be invoked multiple times for chunked requests */
+    /** @deprecated */
+    onBodySent?(chunkSize: number, totalBytesSent: number): void;
+  }
+  export type PipelineHandler<TOpaque = null> = (data: PipelineHandlerData<TOpaque>) => Readable
+  export type HttpMethod = Autocomplete<'GET' | 'HEAD' | 'POST' | 'PUT' | 'DELETE' | 'CONNECT' | 'OPTIONS' | 'TRACE' | 'PATCH'>
+
+  /**
+   * @link https://fetch.spec.whatwg.org/#body-mixin
+   */
+  interface BodyMixin {
+    readonly body?: never;
+    readonly bodyUsed: boolean;
+    arrayBuffer(): Promise<ArrayBuffer>;
+    blob(): Promise<Blob>;
+    bytes(): Promise<Uint8Array>;
+    formData(): Promise<never>;
+    json(): Promise<unknown>;
+    text(): Promise<string>;
+  }
+
+  export interface DispatchInterceptor {
+    (dispatch: Dispatch): Dispatch
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/env-http-proxy-agent.d.ts b/mqtt-backend/node_modules/undici-types/env-http-proxy-agent.d.ts
new file mode 100644
index 0000000..1733d7f
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/env-http-proxy-agent.d.ts
@@ -0,0 +1,22 @@
+import Agent from './agent'
+import ProxyAgent from './proxy-agent'
+import Dispatcher from './dispatcher'
+
+export default EnvHttpProxyAgent
+
+declare class EnvHttpProxyAgent extends Dispatcher {
+  constructor (opts?: EnvHttpProxyAgent.Options)
+
+  dispatch (options: Agent.DispatchOptions, handler: Dispatcher.DispatchHandler): boolean
+}
+
+declare namespace EnvHttpProxyAgent {
+  export interface Options extends Omit<ProxyAgent.Options, 'uri'> {
+    /** Overrides the value of the HTTP_PROXY environment variable  */
+    httpProxy?: string;
+    /** Overrides the value of the HTTPS_PROXY environment variable  */
+    httpsProxy?: string;
+    /** Overrides the value of the NO_PROXY environment variable  */
+    noProxy?: string;
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/errors.d.ts b/mqtt-backend/node_modules/undici-types/errors.d.ts
new file mode 100644
index 0000000..fbf3195
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/errors.d.ts
@@ -0,0 +1,161 @@
+import { IncomingHttpHeaders } from './header'
+import Client from './client'
+
+export default Errors
+
+declare namespace Errors {
+  export class UndiciError extends Error {
+    name: string
+    code: string
+  }
+
+  /** Connect timeout error. */
+  export class ConnectTimeoutError extends UndiciError {
+    name: 'ConnectTimeoutError'
+    code: 'UND_ERR_CONNECT_TIMEOUT'
+  }
+
+  /** A header exceeds the `headersTimeout` option. */
+  export class HeadersTimeoutError extends UndiciError {
+    name: 'HeadersTimeoutError'
+    code: 'UND_ERR_HEADERS_TIMEOUT'
+  }
+
+  /** Headers overflow error. */
+  export class HeadersOverflowError extends UndiciError {
+    name: 'HeadersOverflowError'
+    code: 'UND_ERR_HEADERS_OVERFLOW'
+  }
+
+  /** A body exceeds the `bodyTimeout` option. */
+  export class BodyTimeoutError extends UndiciError {
+    name: 'BodyTimeoutError'
+    code: 'UND_ERR_BODY_TIMEOUT'
+  }
+
+  export class ResponseError extends UndiciError {
+    constructor (
+      message: string,
+      code: number,
+      options: {
+        headers?: IncomingHttpHeaders | string[] | null,
+        body?: null | Record<string, any> | string
+      }
+    )
+    name: 'ResponseError'
+    code: 'UND_ERR_RESPONSE'
+    statusCode: number
+    body: null | Record<string, any> | string
+    headers: IncomingHttpHeaders | string[] | null
+  }
+
+  /** Passed an invalid argument. */
+  export class InvalidArgumentError extends UndiciError {
+    name: 'InvalidArgumentError'
+    code: 'UND_ERR_INVALID_ARG'
+  }
+
+  /** Returned an invalid value. */
+  export class InvalidReturnValueError extends UndiciError {
+    name: 'InvalidReturnValueError'
+    code: 'UND_ERR_INVALID_RETURN_VALUE'
+  }
+
+  /** The request has been aborted by the user. */
+  export class RequestAbortedError extends UndiciError {
+    name: 'AbortError'
+    code: 'UND_ERR_ABORTED'
+  }
+
+  /** Expected error with reason. */
+  export class InformationalError extends UndiciError {
+    name: 'InformationalError'
+    code: 'UND_ERR_INFO'
+  }
+
+  /** Request body length does not match content-length header. */
+  export class RequestContentLengthMismatchError extends UndiciError {
+    name: 'RequestContentLengthMismatchError'
+    code: 'UND_ERR_REQ_CONTENT_LENGTH_MISMATCH'
+  }
+
+  /** Response body length does not match content-length header. */
+  export class ResponseContentLengthMismatchError extends UndiciError {
+    name: 'ResponseContentLengthMismatchError'
+    code: 'UND_ERR_RES_CONTENT_LENGTH_MISMATCH'
+  }
+
+  /** Trying to use a destroyed client. */
+  export class ClientDestroyedError extends UndiciError {
+    name: 'ClientDestroyedError'
+    code: 'UND_ERR_DESTROYED'
+  }
+
+  /** Trying to use a closed client. */
+  export class ClientClosedError extends UndiciError {
+    name: 'ClientClosedError'
+    code: 'UND_ERR_CLOSED'
+  }
+
+  /** There is an error with the socket. */
+  export class SocketError extends UndiciError {
+    name: 'SocketError'
+    code: 'UND_ERR_SOCKET'
+    socket: Client.SocketInfo | null
+  }
+
+  /** Encountered unsupported functionality. */
+  export class NotSupportedError extends UndiciError {
+    name: 'NotSupportedError'
+    code: 'UND_ERR_NOT_SUPPORTED'
+  }
+
+  /** No upstream has been added to the BalancedPool. */
+  export class BalancedPoolMissingUpstreamError extends UndiciError {
+    name: 'MissingUpstreamError'
+    code: 'UND_ERR_BPL_MISSING_UPSTREAM'
+  }
+
+  export class HTTPParserError extends UndiciError {
+    name: 'HTTPParserError'
+    code: string
+  }
+
+  /** The response exceed the length allowed. */
+  export class ResponseExceededMaxSizeError extends UndiciError {
+    name: 'ResponseExceededMaxSizeError'
+    code: 'UND_ERR_RES_EXCEEDED_MAX_SIZE'
+  }
+
+  export class RequestRetryError extends UndiciError {
+    constructor (
+      message: string,
+      statusCode: number,
+      headers?: IncomingHttpHeaders | string[] | null,
+      body?: null | Record<string, any> | string
+    )
+    name: 'RequestRetryError'
+    code: 'UND_ERR_REQ_RETRY'
+    statusCode: number
+    data: {
+      count: number;
+    }
+
+    headers: Record<string, string | string[]>
+  }
+
+  export class SecureProxyConnectionError extends UndiciError {
+    constructor (
+      cause?: Error,
+      message?: string,
+      options?: Record<any, any>
+    )
+    name: 'SecureProxyConnectionError'
+    code: 'UND_ERR_PRX_TLS'
+  }
+
+  class MaxOriginsReachedError extends UndiciError {
+    name: 'MaxOriginsReachedError'
+    code: 'UND_ERR_MAX_ORIGINS_REACHED'
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/eventsource.d.ts b/mqtt-backend/node_modules/undici-types/eventsource.d.ts
new file mode 100644
index 0000000..081ca09
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/eventsource.d.ts
@@ -0,0 +1,66 @@
+import { MessageEvent, ErrorEvent } from './websocket'
+import Dispatcher from './dispatcher'
+
+import {
+  EventListenerOptions,
+  AddEventListenerOptions,
+  EventListenerOrEventListenerObject
+} from './patch'
+
+interface EventSourceEventMap {
+  error: ErrorEvent
+  message: MessageEvent
+  open: Event
+}
+
+interface EventSource extends EventTarget {
+  close(): void
+  readonly CLOSED: 2
+  readonly CONNECTING: 0
+  readonly OPEN: 1
+  onerror: ((this: EventSource, ev: ErrorEvent) => any) | null
+  onmessage: ((this: EventSource, ev: MessageEvent) => any) | null
+  onopen: ((this: EventSource, ev: Event) => any) | null
+  readonly readyState: 0 | 1 | 2
+  readonly url: string
+  readonly withCredentials: boolean
+
+  addEventListener<K extends keyof EventSourceEventMap>(
+    type: K,
+    listener: (this: EventSource, ev: EventSourceEventMap[K]) => any,
+    options?: boolean | AddEventListenerOptions
+  ): void
+  addEventListener(
+    type: string,
+    listener: EventListenerOrEventListenerObject,
+    options?: boolean | AddEventListenerOptions
+  ): void
+  removeEventListener<K extends keyof EventSourceEventMap>(
+    type: K,
+    listener: (this: EventSource, ev: EventSourceEventMap[K]) => any,
+    options?: boolean | EventListenerOptions
+  ): void
+  removeEventListener(
+    type: string,
+    listener: EventListenerOrEventListenerObject,
+    options?: boolean | EventListenerOptions
+  ): void
+}
+
+export declare const EventSource: {
+  prototype: EventSource
+  new (url: string | URL, init?: EventSourceInit): EventSource
+  readonly CLOSED: 2
+  readonly CONNECTING: 0
+  readonly OPEN: 1
+}
+
+interface EventSourceInit {
+  withCredentials?: boolean
+  // @deprecated use `node.dispatcher` instead
+  dispatcher?: Dispatcher
+  node?: {
+    dispatcher?: Dispatcher
+    reconnectionTime?: number
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/fetch.d.ts b/mqtt-backend/node_modules/undici-types/fetch.d.ts
new file mode 100644
index 0000000..ec33e5b
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/fetch.d.ts
@@ -0,0 +1,211 @@
+// based on https://github.com/Ethan-Arrowood/undici-fetch/blob/249269714db874351589d2d364a0645d5160ae71/index.d.ts (MIT license)
+// and https://github.com/node-fetch/node-fetch/blob/914ce6be5ec67a8bab63d68510aabf07cb818b6d/index.d.ts (MIT license)
+/// <reference types="node" />
+
+import { Blob } from 'node:buffer'
+import { URL, URLSearchParams } from 'node:url'
+import { ReadableStream } from 'node:stream/web'
+import { FormData } from './formdata'
+import { HeaderRecord } from './header'
+import Dispatcher from './dispatcher'
+
+export type RequestInfo = string | URL | Request
+
+export declare function fetch (
+  input: RequestInfo,
+  init?: RequestInit
+): Promise<Response>
+
+export type BodyInit =
+  | ArrayBuffer
+  | AsyncIterable<Uint8Array>
+  | Blob
+  | FormData
+  | Iterable<Uint8Array>
+  | NodeJS.ArrayBufferView
+  | URLSearchParams
+  | null
+  | string
+
+export class BodyMixin {
+  readonly body: ReadableStream | null
+  readonly bodyUsed: boolean
+
+  readonly arrayBuffer: () => Promise<ArrayBuffer>
+  readonly blob: () => Promise<Blob>
+  readonly bytes: () => Promise<Uint8Array>
+  /**
+   * @deprecated This method is not recommended for parsing multipart/form-data bodies in server environments.
+   * It is recommended to use a library such as [@fastify/busboy](https://www.npmjs.com/package/@fastify/busboy) as follows:
+   *
+   * @example
+   * ```js
+   * import { Busboy } from '@fastify/busboy'
+   * import { Readable } from 'node:stream'
+   *
+   * const response = await fetch('...')
+   * const busboy = new Busboy({ headers: { 'content-type': response.headers.get('content-type') } })
+   *
+   * // handle events emitted from `busboy`
+   *
+   * Readable.fromWeb(response.body).pipe(busboy)
+   * ```
+   */
+  readonly formData: () => Promise<FormData>
+  readonly json: () => Promise<unknown>
+  readonly text: () => Promise<string>
+}
+
+export interface SpecIterator<T, TReturn = any, TNext = undefined> {
+  next(...args: [] | [TNext]): IteratorResult<T, TReturn>;
+}
+
+export interface SpecIterableIterator<T> extends SpecIterator<T> {
+  [Symbol.iterator](): SpecIterableIterator<T>;
+}
+
+export interface SpecIterable<T> {
+  [Symbol.iterator](): SpecIterator<T>;
+}
+
+export type HeadersInit = [string, string][] | HeaderRecord | Headers
+
+export declare class Headers implements SpecIterable<[string, string]> {
+  constructor (init?: HeadersInit)
+  readonly append: (name: string, value: string) => void
+  readonly delete: (name: string) => void
+  readonly get: (name: string) => string | null
+  readonly has: (name: string) => boolean
+  readonly set: (name: string, value: string) => void
+  readonly getSetCookie: () => string[]
+  readonly forEach: (
+    callbackfn: (value: string, key: string, iterable: Headers) => void,
+    thisArg?: unknown
+  ) => void
+
+  readonly keys: () => SpecIterableIterator<string>
+  readonly values: () => SpecIterableIterator<string>
+  readonly entries: () => SpecIterableIterator<[string, string]>
+  readonly [Symbol.iterator]: () => SpecIterableIterator<[string, string]>
+}
+
+export type RequestCache =
+  | 'default'
+  | 'force-cache'
+  | 'no-cache'
+  | 'no-store'
+  | 'only-if-cached'
+  | 'reload'
+
+export type RequestCredentials = 'omit' | 'include' | 'same-origin'
+
+type RequestDestination =
+  | ''
+  | 'audio'
+  | 'audioworklet'
+  | 'document'
+  | 'embed'
+  | 'font'
+  | 'image'
+  | 'manifest'
+  | 'object'
+  | 'paintworklet'
+  | 'report'
+  | 'script'
+  | 'sharedworker'
+  | 'style'
+  | 'track'
+  | 'video'
+  | 'worker'
+  | 'xslt'
+
+export interface RequestInit {
+  body?: BodyInit | null
+  cache?: RequestCache
+  credentials?: RequestCredentials
+  dispatcher?: Dispatcher
+  duplex?: RequestDuplex
+  headers?: HeadersInit
+  integrity?: string
+  keepalive?: boolean
+  method?: string
+  mode?: RequestMode
+  redirect?: RequestRedirect
+  referrer?: string
+  referrerPolicy?: ReferrerPolicy
+  signal?: AbortSignal | null
+  window?: null
+}
+
+export type ReferrerPolicy =
+  | ''
+  | 'no-referrer'
+  | 'no-referrer-when-downgrade'
+  | 'origin'
+  | 'origin-when-cross-origin'
+  | 'same-origin'
+  | 'strict-origin'
+  | 'strict-origin-when-cross-origin'
+  | 'unsafe-url'
+
+export type RequestMode = 'cors' | 'navigate' | 'no-cors' | 'same-origin'
+
+export type RequestRedirect = 'error' | 'follow' | 'manual'
+
+export type RequestDuplex = 'half'
+
+export declare class Request extends BodyMixin {
+  constructor (input: RequestInfo, init?: RequestInit)
+
+  readonly cache: RequestCache
+  readonly credentials: RequestCredentials
+  readonly destination: RequestDestination
+  readonly headers: Headers
+  readonly integrity: string
+  readonly method: string
+  readonly mode: RequestMode
+  readonly redirect: RequestRedirect
+  readonly referrer: string
+  readonly referrerPolicy: ReferrerPolicy
+  readonly url: string
+
+  readonly keepalive: boolean
+  readonly signal: AbortSignal
+  readonly duplex: RequestDuplex
+
+  readonly clone: () => Request
+}
+
+export interface ResponseInit {
+  readonly status?: number
+  readonly statusText?: string
+  readonly headers?: HeadersInit
+}
+
+export type ResponseType =
+  | 'basic'
+  | 'cors'
+  | 'default'
+  | 'error'
+  | 'opaque'
+  | 'opaqueredirect'
+
+export type ResponseRedirectStatus = 301 | 302 | 303 | 307 | 308
+
+export declare class Response extends BodyMixin {
+  constructor (body?: BodyInit, init?: ResponseInit)
+
+  readonly headers: Headers
+  readonly ok: boolean
+  readonly status: number
+  readonly statusText: string
+  readonly type: ResponseType
+  readonly url: string
+  readonly redirected: boolean
+
+  readonly clone: () => Response
+
+  static error (): Response
+  static json (data: any, init?: ResponseInit): Response
+  static redirect (url: string | URL, status?: ResponseRedirectStatus): Response
+}
diff --git a/mqtt-backend/node_modules/undici-types/formdata.d.ts b/mqtt-backend/node_modules/undici-types/formdata.d.ts
new file mode 100644
index 0000000..b9819a7
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/formdata.d.ts
@@ -0,0 +1,108 @@
+// Based on https://github.com/octet-stream/form-data/blob/2d0f0dc371517444ce1f22cdde13f51995d0953a/lib/FormData.ts (MIT)
+/// <reference types="node" />
+
+import { File } from 'node:buffer'
+import { SpecIterableIterator } from './fetch'
+
+/**
+ * A `string` or `File` that represents a single value from a set of `FormData` key-value pairs.
+ */
+declare type FormDataEntryValue = string | File
+
+/**
+ * Provides a way to easily construct a set of key/value pairs representing form fields and their values, which can then be easily sent using fetch().
+ */
+export declare class FormData {
+  /**
+   * Appends a new value onto an existing key inside a FormData object,
+   * or adds the key if it does not already exist.
+   *
+   * The difference between `set()` and `append()` is that if the specified key already exists, `set()` will overwrite all existing values with the new one, whereas `append()` will append the new value onto the end of the existing set of values.
+   *
+   * @param name The name of the field whose data is contained in `value`.
+   * @param value The field's value. This can be [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob)
+    or [`File`](https://developer.mozilla.org/en-US/docs/Web/API/File). If none of these are specified the value is converted to a string.
+   * @param fileName The filename reported to the server, when a Blob or File is passed as the second parameter. The default filename for Blob objects is "blob". The default filename for File objects is the file's filename.
+   */
+  append (name: string, value: unknown, fileName?: string): void
+
+  /**
+   * Set a new value for an existing key inside FormData,
+   * or add the new field if it does not already exist.
+   *
+   * @param name The name of the field whose data is contained in `value`.
+   * @param value The field's value. This can be [`Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob)
+    or [`File`](https://developer.mozilla.org/en-US/docs/Web/API/File). If none of these are specified the value is converted to a string.
+   * @param fileName The filename reported to the server, when a Blob or File is passed as the second parameter. The default filename for Blob objects is "blob". The default filename for File objects is the file's filename.
+   *
+   */
+  set (name: string, value: unknown, fileName?: string): void
+
+  /**
+   * Returns the first value associated with a given key from within a `FormData` object.
+   * If you expect multiple values and want all of them, use the `getAll()` method instead.
+   *
+   * @param {string} name A name of the value you want to retrieve.
+   *
+   * @returns A `FormDataEntryValue` containing the value. If the key doesn't exist, the method returns null.
+   */
+  get (name: string): FormDataEntryValue | null
+
+  /**
+   * Returns all the values associated with a given key from within a `FormData` object.
+   *
+   * @param {string} name A name of the value you want to retrieve.
+   *
+   * @returns An array of `FormDataEntryValue` whose key matches the value passed in the `name` parameter. If the key doesn't exist, the method returns an empty list.
+   */
+  getAll (name: string): FormDataEntryValue[]
+
+  /**
+   * Returns a boolean stating whether a `FormData` object contains a certain key.
+   *
+   * @param name A string representing the name of the key you want to test for.
+   *
+   * @return A boolean value.
+   */
+  has (name: string): boolean
+
+  /**
+   * Deletes a key and its value(s) from a `FormData` object.
+   *
+   * @param name The name of the key you want to delete.
+   */
+  delete (name: string): void
+
+  /**
+   * Executes given callback function for each field of the FormData instance
+   */
+  forEach: (
+    callbackfn: (value: FormDataEntryValue, key: string, iterable: FormData) => void,
+    thisArg?: unknown
+  ) => void
+
+  /**
+   * Returns an [`iterator`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols) allowing to go through all keys contained in this `FormData` object.
+   * Each key is a `string`.
+   */
+  keys: () => SpecIterableIterator<string>
+
+  /**
+   * Returns an [`iterator`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols) allowing to go through all values contained in this object `FormData` object.
+   * Each value is a [`FormDataValue`](https://developer.mozilla.org/en-US/docs/Web/API/FormDataEntryValue).
+   */
+  values: () => SpecIterableIterator<FormDataEntryValue>
+
+  /**
+   * Returns an [`iterator`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols) allowing to go through the `FormData` key/value pairs.
+   * The key of each pair is a string; the value is a [`FormDataValue`](https://developer.mozilla.org/en-US/docs/Web/API/FormDataEntryValue).
+   */
+  entries: () => SpecIterableIterator<[string, FormDataEntryValue]>
+
+  /**
+   * An alias for FormData#entries()
+   */
+  [Symbol.iterator]: () => SpecIterableIterator<[string, FormDataEntryValue]>
+
+  readonly [Symbol.toStringTag]: string
+}
diff --git a/mqtt-backend/node_modules/undici-types/global-dispatcher.d.ts b/mqtt-backend/node_modules/undici-types/global-dispatcher.d.ts
new file mode 100644
index 0000000..2760e13
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/global-dispatcher.d.ts
@@ -0,0 +1,9 @@
+import Dispatcher from './dispatcher'
+
+declare function setGlobalDispatcher<DispatcherImplementation extends Dispatcher> (dispatcher: DispatcherImplementation): void
+declare function getGlobalDispatcher (): Dispatcher
+
+export {
+  getGlobalDispatcher,
+  setGlobalDispatcher
+}
diff --git a/mqtt-backend/node_modules/undici-types/global-origin.d.ts b/mqtt-backend/node_modules/undici-types/global-origin.d.ts
new file mode 100644
index 0000000..265769b
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/global-origin.d.ts
@@ -0,0 +1,7 @@
+declare function setGlobalOrigin (origin: string | URL | undefined): void
+declare function getGlobalOrigin (): URL | undefined
+
+export {
+  setGlobalOrigin,
+  getGlobalOrigin
+}
diff --git a/mqtt-backend/node_modules/undici-types/h2c-client.d.ts b/mqtt-backend/node_modules/undici-types/h2c-client.d.ts
new file mode 100644
index 0000000..7b97449
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/h2c-client.d.ts
@@ -0,0 +1,73 @@
+import { URL } from 'node:url'
+import Dispatcher from './dispatcher'
+import buildConnector from './connector'
+
+type H2ClientOptions = Omit<Dispatcher.ConnectOptions, 'origin'>
+
+/**
+ * A basic H2C client, mapped on top a single TCP connection. Pipelining is disabled by default.
+ */
+export class H2CClient extends Dispatcher {
+  constructor (url: string | URL, options?: H2CClient.Options)
+  /** Property to get and set the pipelining factor. */
+  pipelining: number
+  /** `true` after `client.close()` has been called. */
+  closed: boolean
+  /** `true` after `client.destroyed()` has been called or `client.close()` has been called and the client shutdown has completed. */
+  destroyed: boolean
+
+  // Override dispatcher APIs.
+  override connect (
+    options: H2ClientOptions
+  ): Promise<Dispatcher.ConnectData>
+  override connect (
+    options: H2ClientOptions,
+    callback: (err: Error | null, data: Dispatcher.ConnectData) => void
+  ): void
+}
+
+export declare namespace H2CClient {
+  export interface Options {
+    /** The maximum length of request headers in bytes. Default: Node.js' `--max-http-header-size` or `16384` (16KiB). */
+    maxHeaderSize?: number;
+    /** The amount of time, in milliseconds, the parser will wait to receive the complete HTTP headers (Node 14 and above only). Default: `300e3` milliseconds (300s). */
+    headersTimeout?: number;
+    /** TODO */
+    connectTimeout?: number;
+    /** The timeout after which a request will time out, in milliseconds. Monitors time between receiving body data. Use `0` to disable it entirely. Default: `300e3` milliseconds (300s). */
+    bodyTimeout?: number;
+    /** the timeout, in milliseconds, after which a socket without active requests will time out. Monitors time between activity on a connected socket. This value may be overridden by *keep-alive* hints from the server. Default: `4e3` milliseconds (4s). */
+    keepAliveTimeout?: number;
+    /** the maximum allowed `idleTimeout`, in milliseconds, when overridden by *keep-alive* hints from the server. Default: `600e3` milliseconds (10min). */
+    keepAliveMaxTimeout?: number;
+    /** A number of milliseconds subtracted from server *keep-alive* hints when overriding `idleTimeout` to account for timing inaccuracies caused by e.g. transport latency. Default: `1e3` milliseconds (1s). */
+    keepAliveTimeoutThreshold?: number;
+    /** TODO */
+    socketPath?: string;
+    /** The amount of concurrent requests to be sent over the single TCP/TLS connection according to [RFC7230](https://tools.ietf.org/html/rfc7230#section-6.3.2). Default: `1`. */
+    pipelining?: number;
+    /** If `true`, an error is thrown when the request content-length header doesn't match the length of the request body. Default: `true`. */
+    strictContentLength?: boolean;
+    /** TODO */
+    maxCachedSessions?: number;
+    /** TODO */
+    connect?: Omit<Partial<buildConnector.BuildOptions>, 'allowH2'> | buildConnector.connector;
+    /** TODO */
+    maxRequestsPerClient?: number;
+    /** TODO */
+    localAddress?: string;
+    /** Max response body size in bytes, -1 is disabled */
+    maxResponseSize?: number;
+    /** Enables a family autodetection algorithm that loosely implements section 5 of RFC 8305. */
+    autoSelectFamily?: boolean;
+    /** The amount of time in milliseconds to wait for a connection attempt to finish before trying the next address when using the `autoSelectFamily` option. */
+    autoSelectFamilyAttemptTimeout?: number;
+    /**
+     * @description Dictates the maximum number of concurrent streams for a single H2 session. It can be overridden by a SETTINGS remote frame.
+     * @default 100
+    */
+    maxConcurrentStreams?: number
+  }
+}
+
+export default H2CClient
diff --git a/mqtt-backend/node_modules/undici-types/handlers.d.ts b/mqtt-backend/node_modules/undici-types/handlers.d.ts
new file mode 100644
index 0000000..8007dbf
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/handlers.d.ts
@@ -0,0 +1,15 @@
+import Dispatcher from './dispatcher'
+
+export declare class RedirectHandler implements Dispatcher.DispatchHandler {
+  constructor (
+    dispatch: Dispatcher.Dispatch,
+    maxRedirections: number,
+    opts: Dispatcher.DispatchOptions,
+    handler: Dispatcher.DispatchHandler,
+    redirectionLimitReached: boolean
+  )
+}
+
+export declare class DecoratorHandler implements Dispatcher.DispatchHandler {
+  constructor (handler: Dispatcher.DispatchHandler)
+}
diff --git a/mqtt-backend/node_modules/undici-types/header.d.ts b/mqtt-backend/node_modules/undici-types/header.d.ts
new file mode 100644
index 0000000..efd7b1d
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/header.d.ts
@@ -0,0 +1,160 @@
+import { Autocomplete } from './utility'
+
+/**
+ * The header type declaration of `undici`.
+ */
+export type IncomingHttpHeaders = Record<string, string | string[] | undefined>
+
+type HeaderNames = Autocomplete<
+  | 'Accept'
+  | 'Accept-CH'
+  | 'Accept-Charset'
+  | 'Accept-Encoding'
+  | 'Accept-Language'
+  | 'Accept-Patch'
+  | 'Accept-Post'
+  | 'Accept-Ranges'
+  | 'Access-Control-Allow-Credentials'
+  | 'Access-Control-Allow-Headers'
+  | 'Access-Control-Allow-Methods'
+  | 'Access-Control-Allow-Origin'
+  | 'Access-Control-Expose-Headers'
+  | 'Access-Control-Max-Age'
+  | 'Access-Control-Request-Headers'
+  | 'Access-Control-Request-Method'
+  | 'Age'
+  | 'Allow'
+  | 'Alt-Svc'
+  | 'Alt-Used'
+  | 'Authorization'
+  | 'Cache-Control'
+  | 'Clear-Site-Data'
+  | 'Connection'
+  | 'Content-Disposition'
+  | 'Content-Encoding'
+  | 'Content-Language'
+  | 'Content-Length'
+  | 'Content-Location'
+  | 'Content-Range'
+  | 'Content-Security-Policy'
+  | 'Content-Security-Policy-Report-Only'
+  | 'Content-Type'
+  | 'Cookie'
+  | 'Cross-Origin-Embedder-Policy'
+  | 'Cross-Origin-Opener-Policy'
+  | 'Cross-Origin-Resource-Policy'
+  | 'Date'
+  | 'Device-Memory'
+  | 'ETag'
+  | 'Expect'
+  | 'Expect-CT'
+  | 'Expires'
+  | 'Forwarded'
+  | 'From'
+  | 'Host'
+  | 'If-Match'
+  | 'If-Modified-Since'
+  | 'If-None-Match'
+  | 'If-Range'
+  | 'If-Unmodified-Since'
+  | 'Keep-Alive'
+  | 'Last-Modified'
+  | 'Link'
+  | 'Location'
+  | 'Max-Forwards'
+  | 'Origin'
+  | 'Permissions-Policy'
+  | 'Priority'
+  | 'Proxy-Authenticate'
+  | 'Proxy-Authorization'
+  | 'Range'
+  | 'Referer'
+  | 'Referrer-Policy'
+  | 'Retry-After'
+  | 'Sec-Fetch-Dest'
+  | 'Sec-Fetch-Mode'
+  | 'Sec-Fetch-Site'
+  | 'Sec-Fetch-User'
+  | 'Sec-Purpose'
+  | 'Sec-WebSocket-Accept'
+  | 'Server'
+  | 'Server-Timing'
+  | 'Service-Worker-Navigation-Preload'
+  | 'Set-Cookie'
+  | 'SourceMap'
+  | 'Strict-Transport-Security'
+  | 'TE'
+  | 'Timing-Allow-Origin'
+  | 'Trailer'
+  | 'Transfer-Encoding'
+  | 'Upgrade'
+  | 'Upgrade-Insecure-Requests'
+  | 'User-Agent'
+  | 'Vary'
+  | 'Via'
+  | 'WWW-Authenticate'
+  | 'X-Content-Type-Options'
+  | 'X-Frame-Options'
+>
+
+type IANARegisteredMimeType = Autocomplete<
+  | 'audio/aac'
+  | 'video/x-msvideo'
+  | 'image/avif'
+  | 'video/av1'
+  | 'application/octet-stream'
+  | 'image/bmp'
+  | 'text/css'
+  | 'text/csv'
+  | 'application/vnd.ms-fontobject'
+  | 'application/epub+zip'
+  | 'image/gif'
+  | 'application/gzip'
+  | 'text/html'
+  | 'image/x-icon'
+  | 'text/calendar'
+  | 'image/jpeg'
+  | 'text/javascript'
+  | 'application/json'
+  | 'application/ld+json'
+  | 'audio/x-midi'
+  | 'audio/mpeg'
+  | 'video/mp4'
+  | 'video/mpeg'
+  | 'audio/ogg'
+  | 'video/ogg'
+  | 'application/ogg'
+  | 'audio/opus'
+  | 'font/otf'
+  | 'application/pdf'
+  | 'image/png'
+  | 'application/rtf'
+  | 'image/svg+xml'
+  | 'image/tiff'
+  | 'video/mp2t'
+  | 'font/ttf'
+  | 'text/plain'
+  | 'application/wasm'
+  | 'video/webm'
+  | 'audio/webm'
+  | 'image/webp'
+  | 'font/woff'
+  | 'font/woff2'
+  | 'application/xhtml+xml'
+  | 'application/xml'
+  | 'application/zip'
+  | 'video/3gpp'
+  | 'video/3gpp2'
+  | 'model/gltf+json'
+  | 'model/gltf-binary'
+>
+
+type KnownHeaderValues = {
+  'content-type': IANARegisteredMimeType
+}
+
+export type HeaderRecord = {
+  [K in HeaderNames | Lowercase<HeaderNames>]?: Lowercase<K> extends keyof KnownHeaderValues
+    ? KnownHeaderValues[Lowercase<K>]
+    : string
+}
diff --git a/mqtt-backend/node_modules/undici-types/index.d.ts b/mqtt-backend/node_modules/undici-types/index.d.ts
new file mode 100644
index 0000000..78ddeaa
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/index.d.ts
@@ -0,0 +1,88 @@
+import Dispatcher from './dispatcher'
+import { setGlobalDispatcher, getGlobalDispatcher } from './global-dispatcher'
+import { setGlobalOrigin, getGlobalOrigin } from './global-origin'
+import Pool from './pool'
+import { RedirectHandler, DecoratorHandler } from './handlers'
+
+import BalancedPool from './balanced-pool'
+import RoundRobinPool from './round-robin-pool'
+import Client from './client'
+import H2CClient from './h2c-client'
+import buildConnector from './connector'
+import errors from './errors'
+import Agent from './agent'
+import MockClient from './mock-client'
+import MockPool from './mock-pool'
+import MockAgent from './mock-agent'
+import { SnapshotAgent } from './snapshot-agent'
+import { MockCallHistory, MockCallHistoryLog } from './mock-call-history'
+import mockErrors from './mock-errors'
+import ProxyAgent from './proxy-agent'
+import EnvHttpProxyAgent from './env-http-proxy-agent'
+import RetryHandler from './retry-handler'
+import RetryAgent from './retry-agent'
+import { request, pipeline, stream, connect, upgrade } from './api'
+import interceptors from './interceptors'
+
+import CacheInterceptor from './cache-interceptor'
+declare const cacheStores: {
+  MemoryCacheStore: typeof CacheInterceptor.MemoryCacheStore;
+  SqliteCacheStore: typeof CacheInterceptor.SqliteCacheStore;
+}
+
+export * from './util'
+export * from './cookies'
+export * from './eventsource'
+export * from './fetch'
+export * from './formdata'
+export * from './diagnostics-channel'
+export * from './websocket'
+export * from './content-type'
+export * from './cache'
+export { Interceptable } from './mock-interceptor'
+
+declare function globalThisInstall (): void
+
+export { Dispatcher, BalancedPool, RoundRobinPool, Pool, Client, buildConnector, errors, Agent, request, stream, pipeline, connect, upgrade, setGlobalDispatcher, getGlobalDispatcher, setGlobalOrigin, getGlobalOrigin, interceptors, cacheStores, MockClient, MockPool, MockAgent, SnapshotAgent, MockCallHistory, MockCallHistoryLog, mockErrors, ProxyAgent, EnvHttpProxyAgent, RedirectHandler, DecoratorHandler, RetryHandler, RetryAgent, H2CClient, globalThisInstall as install }
+export default Undici
+
+declare namespace Undici {
+  const Dispatcher: typeof import('./dispatcher').default
+  const Pool: typeof import('./pool').default
+  const RedirectHandler: typeof import ('./handlers').RedirectHandler
+  const DecoratorHandler: typeof import ('./handlers').DecoratorHandler
+  const RetryHandler: typeof import ('./retry-handler').default
+  const BalancedPool: typeof import('./balanced-pool').default
+  const RoundRobinPool: typeof import('./round-robin-pool').default
+  const Client: typeof import('./client').default
+  const H2CClient: typeof import('./h2c-client').default
+  const buildConnector: typeof import('./connector').default
+  const errors: typeof import('./errors').default
+  const Agent: typeof import('./agent').default
+  const setGlobalDispatcher: typeof import('./global-dispatcher').setGlobalDispatcher
+  const getGlobalDispatcher: typeof import('./global-dispatcher').getGlobalDispatcher
+  const request: typeof import('./api').request
+  const stream: typeof import('./api').stream
+  const pipeline: typeof import('./api').pipeline
+  const connect: typeof import('./api').connect
+  const upgrade: typeof import('./api').upgrade
+  const MockClient: typeof import('./mock-client').default
+  const MockPool: typeof import('./mock-pool').default
+  const MockAgent: typeof import('./mock-agent').default
+  const SnapshotAgent: typeof import('./snapshot-agent').SnapshotAgent
+  const MockCallHistory: typeof import('./mock-call-history').MockCallHistory
+  const MockCallHistoryLog: typeof import('./mock-call-history').MockCallHistoryLog
+  const mockErrors: typeof import('./mock-errors').default
+  const fetch: typeof import('./fetch').fetch
+  const Headers: typeof import('./fetch').Headers
+  const Response: typeof import('./fetch').Response
+  const Request: typeof import('./fetch').Request
+  const FormData: typeof import('./formdata').FormData
+  const caches: typeof import('./cache').caches
+  const interceptors: typeof import('./interceptors').default
+  const cacheStores: {
+    MemoryCacheStore: typeof import('./cache-interceptor').default.MemoryCacheStore,
+    SqliteCacheStore: typeof import('./cache-interceptor').default.SqliteCacheStore
+  }
+  const install: typeof globalThisInstall
+}
diff --git a/mqtt-backend/node_modules/undici-types/interceptors.d.ts b/mqtt-backend/node_modules/undici-types/interceptors.d.ts
new file mode 100644
index 0000000..1dfd04f
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/interceptors.d.ts
@@ -0,0 +1,73 @@
+import CacheHandler from './cache-interceptor'
+import Dispatcher from './dispatcher'
+import RetryHandler from './retry-handler'
+import { LookupOptions } from 'node:dns'
+
+export default Interceptors
+
+declare namespace Interceptors {
+  export type DumpInterceptorOpts = { maxSize?: number }
+  export type RetryInterceptorOpts = RetryHandler.RetryOptions
+  export type RedirectInterceptorOpts = { maxRedirections?: number }
+  export type DecompressInterceptorOpts = {
+    skipErrorResponses?: boolean
+    skipStatusCodes?: number[]
+  }
+
+  export type ResponseErrorInterceptorOpts = { throwOnError: boolean }
+  export type CacheInterceptorOpts = CacheHandler.CacheOptions
+
+  // DNS interceptor
+  export type DNSInterceptorRecord = { address: string, ttl: number, family: 4 | 6 }
+  export type DNSInterceptorOriginRecords = { records: { 4: { ips: DNSInterceptorRecord[] } | null, 6: { ips: DNSInterceptorRecord[] } | null } }
+  export type DNSStorage = {
+    size: number
+    get(origin: string): DNSInterceptorOriginRecords | null
+    set(origin: string, records: DNSInterceptorOriginRecords | null, options: { ttl: number }): void
+    delete(origin: string): void
+    full(): boolean
+  }
+  export type DNSInterceptorOpts = {
+    maxTTL?: number
+    maxItems?: number
+    lookup?: (origin: URL, options: LookupOptions, callback: (err: NodeJS.ErrnoException | null, addresses: DNSInterceptorRecord[]) => void) => void
+    pick?: (origin: URL, records: DNSInterceptorOriginRecords, affinity: 4 | 6) => DNSInterceptorRecord
+    dualStack?: boolean
+    affinity?: 4 | 6
+    storage?: DNSStorage
+  }
+
+  // Deduplicate interceptor
+  export type DeduplicateMethods = 'GET' | 'HEAD' | 'OPTIONS' | 'TRACE'
+  export type DeduplicateInterceptorOpts = {
+    /**
+     * The HTTP methods to deduplicate.
+     * Note: Only safe HTTP methods can be deduplicated.
+     * @default ['GET']
+     */
+    methods?: DeduplicateMethods[]
+    /**
+     * Header names that, if present in a request, will cause the request to skip deduplication.
+     * Header name matching is case-insensitive.
+     * @default []
+     */
+    skipHeaderNames?: string[]
+    /**
+     * Header names to exclude from the deduplication key.
+     * Requests with different values for these headers will still be deduplicated together.
+     * Useful for headers like `x-request-id` that vary per request but shouldn't affect deduplication.
+     * Header name matching is case-insensitive.
+     * @default []
+     */
+    excludeHeaderNames?: string[]
+  }
+
+  export function dump (opts?: DumpInterceptorOpts): Dispatcher.DispatcherComposeInterceptor
+  export function retry (opts?: RetryInterceptorOpts): Dispatcher.DispatcherComposeInterceptor
+  export function redirect (opts?: RedirectInterceptorOpts): Dispatcher.DispatcherComposeInterceptor
+  export function decompress (opts?: DecompressInterceptorOpts): Dispatcher.DispatcherComposeInterceptor
+  export function responseError (opts?: ResponseErrorInterceptorOpts): Dispatcher.DispatcherComposeInterceptor
+  export function dns (opts?: DNSInterceptorOpts): Dispatcher.DispatcherComposeInterceptor
+  export function cache (opts?: CacheInterceptorOpts): Dispatcher.DispatcherComposeInterceptor
+  export function deduplicate (opts?: DeduplicateInterceptorOpts): Dispatcher.DispatcherComposeInterceptor
+}
diff --git a/mqtt-backend/node_modules/undici-types/mock-agent.d.ts b/mqtt-backend/node_modules/undici-types/mock-agent.d.ts
new file mode 100644
index 0000000..330926b
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/mock-agent.d.ts
@@ -0,0 +1,68 @@
+import Agent from './agent'
+import Dispatcher from './dispatcher'
+import { Interceptable, MockInterceptor } from './mock-interceptor'
+import MockDispatch = MockInterceptor.MockDispatch
+import { MockCallHistory } from './mock-call-history'
+
+export default MockAgent
+
+interface PendingInterceptor extends MockDispatch {
+  origin: string;
+}
+
+/** A mocked Agent class that implements the Agent API. It allows one to intercept HTTP requests made through undici and return mocked responses instead. */
+declare class MockAgent<TMockAgentOptions extends MockAgent.Options = MockAgent.Options> extends Dispatcher {
+  constructor (options?: TMockAgentOptions)
+  /** Creates and retrieves mock Dispatcher instances which can then be used to intercept HTTP requests. If the number of connections on the mock agent is set to 1, a MockClient instance is returned. Otherwise a MockPool instance is returned. */
+  get<TInterceptable extends Interceptable>(origin: string): TInterceptable
+  get<TInterceptable extends Interceptable>(origin: RegExp): TInterceptable
+  get<TInterceptable extends Interceptable>(origin: ((origin: string) => boolean)): TInterceptable
+  /** Dispatches a mocked request. */
+  dispatch (options: Agent.DispatchOptions, handler: Dispatcher.DispatchHandler): boolean
+  /** Closes the mock agent and waits for registered mock pools and clients to also close before resolving. */
+  close (): Promise<void>
+  /** Disables mocking in MockAgent. */
+  deactivate (): void
+  /** Enables mocking in a MockAgent instance. When instantiated, a MockAgent is automatically activated. Therefore, this method is only effective after `MockAgent.deactivate` has been called. */
+  activate (): void
+  /** Define host matchers so only matching requests that aren't intercepted by the mock dispatchers will be attempted. */
+  enableNetConnect (): void
+  enableNetConnect (host: string): void
+  enableNetConnect (host: RegExp): void
+  enableNetConnect (host: ((host: string) => boolean)): void
+  /** Causes all requests to throw when requests are not matched in a MockAgent intercept. */
+  disableNetConnect (): void
+  /** get call history. returns the MockAgent call history or undefined if the option is not enabled. */
+  getCallHistory (): MockCallHistory | undefined
+  /** clear every call history. Any MockCallHistoryLog will be deleted on the MockCallHistory instance */
+  clearCallHistory (): void
+  /** Enable call history. Any subsequence calls will then be registered. */
+  enableCallHistory (): this
+  /** Disable call history. Any subsequence calls will then not be registered. */
+  disableCallHistory (): this
+  pendingInterceptors (): PendingInterceptor[]
+  assertNoPendingInterceptors (options?: {
+    pendingInterceptorsFormatter?: PendingInterceptorsFormatter;
+  }): void
+}
+
+interface PendingInterceptorsFormatter {
+  format(pendingInterceptors: readonly PendingInterceptor[]): string;
+}
+
+declare namespace MockAgent {
+  /** MockAgent options. */
+  export interface Options extends Agent.Options {
+    /** A custom agent to be encapsulated by the MockAgent. */
+    agent?: Dispatcher;
+
+    /** Ignore trailing slashes in the path */
+    ignoreTrailingSlash?: boolean;
+
+    /** Accept URLs with search parameters using non standard syntaxes. default false */
+    acceptNonStandardSearchParameters?: boolean;
+
+    /** Enable call history. you can either call MockAgent.enableCallHistory(). default false */
+    enableCallHistory?: boolean
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/mock-call-history.d.ts b/mqtt-backend/node_modules/undici-types/mock-call-history.d.ts
new file mode 100644
index 0000000..df07fa0
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/mock-call-history.d.ts
@@ -0,0 +1,111 @@
+import Dispatcher from './dispatcher'
+
+declare namespace MockCallHistoryLog {
+  /** request's configuration properties */
+  export type MockCallHistoryLogProperties = 'protocol' | 'host' | 'port' | 'origin' | 'path' | 'hash' | 'fullUrl' | 'method' | 'searchParams' | 'body' | 'headers'
+}
+
+/** a log reflecting request configuration  */
+declare class MockCallHistoryLog {
+  constructor (requestInit: Dispatcher.DispatchOptions)
+  /** protocol used. ie. 'https:' or 'http:' etc... */
+  protocol: string
+  /** request's host. */
+  host: string
+  /** request's port. */
+  port: string
+  /** request's origin. ie. https://localhost:3000. */
+  origin: string
+  /** path. never contains searchParams. */
+  path: string
+  /** request's hash. */
+  hash: string
+  /** the full url requested. */
+  fullUrl: string
+  /** request's method. */
+  method: string
+  /** search params. */
+  searchParams: Record<string, string>
+  /** request's body */
+  body: string | null | undefined
+  /** request's headers */
+  headers: Record<string, string | string[]> | null | undefined
+
+  /** returns an Map of property / value pair */
+  toMap (): Map<MockCallHistoryLog.MockCallHistoryLogProperties, string | Record<string, string | string[]> | null | undefined>
+
+  /** returns a string computed with all key value pair */
+  toString (): string
+}
+
+declare namespace MockCallHistory {
+  export type FilterCallsOperator = 'AND' | 'OR'
+
+  /** modify the filtering behavior */
+  export interface FilterCallsOptions {
+    /** the operator to apply when filtering. 'OR' will adds any MockCallHistoryLog matching any criteria given. 'AND' will adds only MockCallHistoryLog matching every criteria given. (default 'OR')  */
+    operator?: FilterCallsOperator | Lowercase<FilterCallsOperator>
+  }
+  /** a function to be executed for filtering MockCallHistoryLog */
+  export type FilterCallsFunctionCriteria = (log: MockCallHistoryLog) => boolean
+
+  /** parameter to filter MockCallHistoryLog */
+  export type FilterCallsParameter = string | RegExp | undefined | null
+
+  /** an object to execute multiple filtering at once */
+  export interface FilterCallsObjectCriteria extends Record<string, FilterCallsParameter> {
+    /** filter by request protocol. ie https: */
+    protocol?: FilterCallsParameter;
+    /** filter by request host. */
+    host?: FilterCallsParameter;
+    /** filter by request port. */
+    port?: FilterCallsParameter;
+    /** filter by request origin. */
+    origin?: FilterCallsParameter;
+    /** filter by request path. */
+    path?: FilterCallsParameter;
+    /** filter by request hash. */
+    hash?: FilterCallsParameter;
+    /** filter by request fullUrl. */
+    fullUrl?: FilterCallsParameter;
+    /** filter by request method. */
+    method?: FilterCallsParameter;
+  }
+}
+
+/** a call history to track requests configuration */
+declare class MockCallHistory {
+  constructor (name: string)
+  /** returns an array of MockCallHistoryLog. */
+  calls (): Array<MockCallHistoryLog>
+  /** returns the first MockCallHistoryLog */
+  firstCall (): MockCallHistoryLog | undefined
+  /** returns the last MockCallHistoryLog. */
+  lastCall (): MockCallHistoryLog | undefined
+  /** returns the nth MockCallHistoryLog. */
+  nthCall (position: number): MockCallHistoryLog | undefined
+  /** return all MockCallHistoryLog matching any of criteria given. if an object is used with multiple properties, you can change the operator to apply during filtering on options */
+  filterCalls (criteria: MockCallHistory.FilterCallsFunctionCriteria | MockCallHistory.FilterCallsObjectCriteria | RegExp, options?: MockCallHistory.FilterCallsOptions): Array<MockCallHistoryLog>
+  /** return all MockCallHistoryLog matching the given protocol. if a string is given, it is matched with includes */
+  filterCallsByProtocol (protocol: MockCallHistory.FilterCallsParameter): Array<MockCallHistoryLog>
+  /** return all MockCallHistoryLog matching the given host. if a string is given, it is matched with includes */
+  filterCallsByHost (host: MockCallHistory.FilterCallsParameter): Array<MockCallHistoryLog>
+  /** return all MockCallHistoryLog matching the given port. if a string is given, it is matched with includes */
+  filterCallsByPort (port: MockCallHistory.FilterCallsParameter): Array<MockCallHistoryLog>
+  /** return all MockCallHistoryLog matching the given origin. if a string is given, it is matched with includes */
+  filterCallsByOrigin (origin: MockCallHistory.FilterCallsParameter): Array<MockCallHistoryLog>
+  /** return all MockCallHistoryLog matching the given path. if a string is given, it is matched with includes */
+  filterCallsByPath (path: MockCallHistory.FilterCallsParameter): Array<MockCallHistoryLog>
+  /** return all MockCallHistoryLog matching the given hash. if a string is given, it is matched with includes */
+  filterCallsByHash (hash: MockCallHistory.FilterCallsParameter): Array<MockCallHistoryLog>
+  /** return all MockCallHistoryLog matching the given fullUrl. if a string is given, it is matched with includes */
+  filterCallsByFullUrl (fullUrl: MockCallHistory.FilterCallsParameter): Array<MockCallHistoryLog>
+  /** return all MockCallHistoryLog matching the given method. if a string is given, it is matched with includes */
+  filterCallsByMethod (method: MockCallHistory.FilterCallsParameter): Array<MockCallHistoryLog>
+  /** clear all MockCallHistoryLog on this MockCallHistory. */
+  clear (): void
+  /** use it with for..of loop or spread operator */
+  [Symbol.iterator]: () => Generator<MockCallHistoryLog>
+}
+
+export { MockCallHistoryLog, MockCallHistory }
diff --git a/mqtt-backend/node_modules/undici-types/mock-client.d.ts b/mqtt-backend/node_modules/undici-types/mock-client.d.ts
new file mode 100644
index 0000000..702e824
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/mock-client.d.ts
@@ -0,0 +1,27 @@
+import Client from './client'
+import Dispatcher from './dispatcher'
+import MockAgent from './mock-agent'
+import { MockInterceptor, Interceptable } from './mock-interceptor'
+
+export default MockClient
+
+/** MockClient extends the Client API and allows one to mock requests. */
+declare class MockClient extends Client implements Interceptable {
+  constructor (origin: string, options: MockClient.Options)
+  /** Intercepts any matching requests that use the same origin as this mock client. */
+  intercept (options: MockInterceptor.Options): MockInterceptor
+  /** Dispatches a mocked request. */
+  dispatch (options: Dispatcher.DispatchOptions, handlers: Dispatcher.DispatchHandler): boolean
+  /** Closes the mock client and gracefully waits for enqueued requests to complete. */
+  close (): Promise<void>
+  /** Clean up all the prepared mocks. */
+  cleanMocks (): void
+}
+
+declare namespace MockClient {
+  /** MockClient options. */
+  export interface Options extends Client.Options {
+    /** The agent to associate this MockClient with. */
+    agent: MockAgent;
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/mock-errors.d.ts b/mqtt-backend/node_modules/undici-types/mock-errors.d.ts
new file mode 100644
index 0000000..eefeecd
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/mock-errors.d.ts
@@ -0,0 +1,12 @@
+import Errors from './errors'
+
+export default MockErrors
+
+declare namespace MockErrors {
+  /** The request does not match any registered mock dispatches. */
+  export class MockNotMatchedError extends Errors.UndiciError {
+    constructor (message?: string)
+    name: 'MockNotMatchedError'
+    code: 'UND_MOCK_ERR_MOCK_NOT_MATCHED'
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/mock-interceptor.d.ts b/mqtt-backend/node_modules/undici-types/mock-interceptor.d.ts
new file mode 100644
index 0000000..a48d715
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/mock-interceptor.d.ts
@@ -0,0 +1,94 @@
+import { IncomingHttpHeaders } from './header'
+import Dispatcher from './dispatcher'
+import { BodyInit, Headers } from './fetch'
+
+/** The scope associated with a mock dispatch. */
+declare class MockScope<TData extends object = object> {
+  constructor (mockDispatch: MockInterceptor.MockDispatch<TData>)
+  /** Delay a reply by a set amount of time in ms. */
+  delay (waitInMs: number): MockScope<TData>
+  /** Persist the defined mock data for the associated reply. It will return the defined mock data indefinitely. */
+  persist (): MockScope<TData>
+  /** Define a reply for a set amount of matching requests. */
+  times (repeatTimes: number): MockScope<TData>
+}
+
+/** The interceptor for a Mock. */
+declare class MockInterceptor {
+  constructor (options: MockInterceptor.Options, mockDispatches: MockInterceptor.MockDispatch[])
+  /** Mock an undici request with the defined reply. */
+  reply<TData extends object = object>(replyOptionsCallback: MockInterceptor.MockReplyOptionsCallback<TData>): MockScope<TData>
+  reply<TData extends object = object>(
+    statusCode: number,
+    data?: TData | Buffer | string | MockInterceptor.MockResponseDataHandler<TData>,
+    responseOptions?: MockInterceptor.MockResponseOptions
+  ): MockScope<TData>
+  /** Mock an undici request by throwing the defined reply error. */
+  replyWithError<TError extends Error = Error>(error: TError): MockScope
+  /** Set default reply headers on the interceptor for subsequent mocked replies. */
+  defaultReplyHeaders (headers: IncomingHttpHeaders): MockInterceptor
+  /** Set default reply trailers on the interceptor for subsequent mocked replies. */
+  defaultReplyTrailers (trailers: Record<string, string>): MockInterceptor
+  /** Set automatically calculated content-length header on subsequent mocked replies. */
+  replyContentLength (): MockInterceptor
+}
+
+declare namespace MockInterceptor {
+  /** MockInterceptor options. */
+  export interface Options {
+    /** Path to intercept on. */
+    path: string | RegExp | ((path: string) => boolean);
+    /** Method to intercept on. Defaults to GET. */
+    method?: string | RegExp | ((method: string) => boolean);
+    /** Body to intercept on. */
+    body?: string | RegExp | ((body: string) => boolean);
+    /** Headers to intercept on. */
+    headers?: Record<string, string | RegExp | ((body: string) => boolean)> | ((headers: Record<string, string>) => boolean);
+    /** Query params to intercept on */
+    query?: Record<string, any>;
+  }
+  export interface MockDispatch<TData extends object = object, TError extends Error = Error> extends Options {
+    times: number | null;
+    persist: boolean;
+    consumed: boolean;
+    data: MockDispatchData<TData, TError>;
+  }
+  export interface MockDispatchData<TData extends object = object, TError extends Error = Error> extends MockResponseOptions {
+    error: TError | null;
+    statusCode?: number;
+    data?: TData | string;
+  }
+  export interface MockResponseOptions {
+    headers?: IncomingHttpHeaders;
+    trailers?: Record<string, string>;
+  }
+
+  export interface MockResponseCallbackOptions {
+    path: string;
+    method: string;
+    headers?: Headers | Record<string, string>;
+    origin?: string;
+    body?: BodyInit | Dispatcher.DispatchOptions['body'] | null;
+  }
+
+  export type MockResponseDataHandler<TData extends object = object> = (
+    opts: MockResponseCallbackOptions
+  ) => TData | Buffer | string
+
+  export type MockReplyOptionsCallback<TData extends object = object> = (
+    opts: MockResponseCallbackOptions
+  ) => { statusCode: number, data?: TData | Buffer | string, responseOptions?: MockResponseOptions }
+}
+
+interface Interceptable extends Dispatcher {
+  /** Intercepts any matching requests that use the same origin as this mock client. */
+  intercept(options: MockInterceptor.Options): MockInterceptor;
+  /** Clean up all the prepared mocks. */
+  cleanMocks (): void
+}
+
+export {
+  Interceptable,
+  MockInterceptor,
+  MockScope
+}
diff --git a/mqtt-backend/node_modules/undici-types/mock-pool.d.ts b/mqtt-backend/node_modules/undici-types/mock-pool.d.ts
new file mode 100644
index 0000000..f35f357
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/mock-pool.d.ts
@@ -0,0 +1,27 @@
+import Pool from './pool'
+import MockAgent from './mock-agent'
+import { Interceptable, MockInterceptor } from './mock-interceptor'
+import Dispatcher from './dispatcher'
+
+export default MockPool
+
+/** MockPool extends the Pool API and allows one to mock requests. */
+declare class MockPool extends Pool implements Interceptable {
+  constructor (origin: string, options: MockPool.Options)
+  /** Intercepts any matching requests that use the same origin as this mock pool. */
+  intercept (options: MockInterceptor.Options): MockInterceptor
+  /** Dispatches a mocked request. */
+  dispatch (options: Dispatcher.DispatchOptions, handlers: Dispatcher.DispatchHandler): boolean
+  /** Closes the mock pool and gracefully waits for enqueued requests to complete. */
+  close (): Promise<void>
+  /** Clean up all the prepared mocks. */
+  cleanMocks (): void
+}
+
+declare namespace MockPool {
+  /** MockPool options. */
+  export interface Options extends Pool.Options {
+    /** The agent to associate this MockPool with. */
+    agent: MockAgent;
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/package.json b/mqtt-backend/node_modules/undici-types/package.json
new file mode 100644
index 0000000..ecd4057
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/package.json
@@ -0,0 +1,55 @@
+{
+  "name": "undici-types",
+  "version": "7.19.2",
+  "description": "A stand-alone types package for Undici",
+  "homepage": "https://undici.nodejs.org",
+  "bugs": {
+    "url": "https://github.com/nodejs/undici/issues"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/nodejs/undici.git"
+  },
+  "license": "MIT",
+  "types": "index.d.ts",
+  "files": [
+    "*.d.ts"
+  ],
+  "contributors": [
+    {
+      "name": "Daniele Belardi",
+      "url": "https://github.com/dnlup",
+      "author": true
+    },
+    {
+      "name": "Ethan Arrowood",
+      "url": "https://github.com/ethan-arrowood",
+      "author": true
+    },
+    {
+      "name": "Matteo Collina",
+      "url": "https://github.com/mcollina",
+      "author": true
+    },
+    {
+      "name": "Matthew Aitken",
+      "url": "https://github.com/KhafraDev",
+      "author": true
+    },
+    {
+      "name": "Robert Nagy",
+      "url": "https://github.com/ronag",
+      "author": true
+    },
+    {
+      "name": "Szymon Marczak",
+      "url": "https://github.com/szmarczak",
+      "author": true
+    },
+    {
+      "name": "Tomas Della Vedova",
+      "url": "https://github.com/delvedor",
+      "author": true
+    }
+  ]
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/undici-types/patch.d.ts b/mqtt-backend/node_modules/undici-types/patch.d.ts
new file mode 100644
index 0000000..8f7acbb
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/patch.d.ts
@@ -0,0 +1,29 @@
+/// <reference types="node" />
+
+// See https://github.com/nodejs/undici/issues/1740
+
+export interface EventInit {
+  bubbles?: boolean
+  cancelable?: boolean
+  composed?: boolean
+}
+
+export interface EventListenerOptions {
+  capture?: boolean
+}
+
+export interface AddEventListenerOptions extends EventListenerOptions {
+  once?: boolean
+  passive?: boolean
+  signal?: AbortSignal
+}
+
+export type EventListenerOrEventListenerObject = EventListener | EventListenerObject
+
+export interface EventListenerObject {
+  handleEvent (object: Event): void
+}
+
+export interface EventListener {
+  (evt: Event): void
+}
diff --git a/mqtt-backend/node_modules/undici-types/pool-stats.d.ts b/mqtt-backend/node_modules/undici-types/pool-stats.d.ts
new file mode 100644
index 0000000..f76a5f6
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/pool-stats.d.ts
@@ -0,0 +1,19 @@
+import Pool from './pool'
+
+export default PoolStats
+
+declare class PoolStats {
+  constructor (pool: Pool)
+  /** Number of open socket connections in this pool. */
+  connected: number
+  /** Number of open socket connections in this pool that do not have an active request. */
+  free: number
+  /** Number of pending requests across all clients in this pool. */
+  pending: number
+  /** Number of queued requests across all clients in this pool. */
+  queued: number
+  /** Number of currently active requests across all clients in this pool. */
+  running: number
+  /** Number of active, pending, or queued requests across all clients in this pool. */
+  size: number
+}
diff --git a/mqtt-backend/node_modules/undici-types/pool.d.ts b/mqtt-backend/node_modules/undici-types/pool.d.ts
new file mode 100644
index 0000000..120bb8b
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/pool.d.ts
@@ -0,0 +1,41 @@
+import Client from './client'
+import TPoolStats from './pool-stats'
+import { URL } from 'node:url'
+import Dispatcher from './dispatcher'
+
+export default Pool
+
+type PoolConnectOptions = Omit<Dispatcher.ConnectOptions, 'origin'>
+
+declare class Pool extends Dispatcher {
+  constructor (url: string | URL, options?: Pool.Options)
+  /** `true` after `pool.close()` has been called. */
+  closed: boolean
+  /** `true` after `pool.destroyed()` has been called or `pool.close()` has been called and the pool shutdown has completed. */
+  destroyed: boolean
+  /** Aggregate stats for a Pool. */
+  readonly stats: TPoolStats
+
+  // Override dispatcher APIs.
+  override connect (
+    options: PoolConnectOptions
+  ): Promise<Dispatcher.ConnectData>
+  override connect (
+    options: PoolConnectOptions,
+    callback: (err: Error | null, data: Dispatcher.ConnectData) => void
+  ): void
+}
+
+declare namespace Pool {
+  export type PoolStats = TPoolStats
+  export interface Options extends Client.Options {
+    /** Default: `(origin, opts) => new Client(origin, opts)`. */
+    factory?(origin: URL, opts: object): Dispatcher;
+    /** The max number of clients to create. `null` if no limit. Default `null`. */
+    connections?: number | null;
+    /** The amount of time before a client is removed from the pool and closed. `null` if no time limit. Default `null` */
+    clientTtl?: number | null;
+
+    interceptors?: { Pool?: readonly Dispatcher.DispatchInterceptor[] } & Client.Options['interceptors']
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/proxy-agent.d.ts b/mqtt-backend/node_modules/undici-types/proxy-agent.d.ts
new file mode 100644
index 0000000..4155542
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/proxy-agent.d.ts
@@ -0,0 +1,29 @@
+import Agent from './agent'
+import buildConnector from './connector'
+import Dispatcher from './dispatcher'
+import { IncomingHttpHeaders } from './header'
+
+export default ProxyAgent
+
+declare class ProxyAgent extends Dispatcher {
+  constructor (options: ProxyAgent.Options | string)
+
+  dispatch (options: Agent.DispatchOptions, handler: Dispatcher.DispatchHandler): boolean
+  close (): Promise<void>
+}
+
+declare namespace ProxyAgent {
+  export interface Options extends Agent.Options {
+    uri: string;
+    /**
+     * @deprecated use opts.token
+     */
+    auth?: string;
+    token?: string;
+    headers?: IncomingHttpHeaders;
+    requestTls?: buildConnector.BuildOptions;
+    proxyTls?: buildConnector.BuildOptions;
+    clientFactory?(origin: URL, opts: object): Dispatcher;
+    proxyTunnel?: boolean;
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/readable.d.ts b/mqtt-backend/node_modules/undici-types/readable.d.ts
new file mode 100644
index 0000000..723ed1f
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/readable.d.ts
@@ -0,0 +1,68 @@
+import { Readable } from 'node:stream'
+import { Blob } from 'node:buffer'
+
+export default BodyReadable
+
+declare class BodyReadable extends Readable {
+  constructor (opts: {
+    resume: (this: Readable, size: number) => void | null;
+    abort: () => void | null;
+    contentType?: string;
+    contentLength?: number;
+    highWaterMark?: number;
+  })
+
+  /** Consumes and returns the body as a string
+   *  https://fetch.spec.whatwg.org/#dom-body-text
+   */
+  text (): Promise<string>
+
+  /** Consumes and returns the body as a JavaScript Object
+   *  https://fetch.spec.whatwg.org/#dom-body-json
+   */
+  json (): Promise<unknown>
+
+  /** Consumes and returns the body as a Blob
+   *  https://fetch.spec.whatwg.org/#dom-body-blob
+   */
+  blob (): Promise<Blob>
+
+  /** Consumes and returns the body as an Uint8Array
+   *  https://fetch.spec.whatwg.org/#dom-body-bytes
+   */
+  bytes (): Promise<Uint8Array>
+
+  /** Consumes and returns the body as an ArrayBuffer
+   *  https://fetch.spec.whatwg.org/#dom-body-arraybuffer
+   */
+  arrayBuffer (): Promise<ArrayBuffer>
+
+  /** Not implemented
+   *
+   *  https://fetch.spec.whatwg.org/#dom-body-formdata
+   */
+  formData (): Promise<never>
+
+  /** Returns true if the body is not null and the body has been consumed
+   *
+   *  Otherwise, returns false
+   *
+   * https://fetch.spec.whatwg.org/#dom-body-bodyused
+   */
+  readonly bodyUsed: boolean
+
+  /**
+   * If body is null, it should return null as the body
+   *
+   *  If body is not null, should return the body as a ReadableStream
+   *
+   *  https://fetch.spec.whatwg.org/#dom-body-body
+   */
+  readonly body: never | undefined
+
+  /** Dumps the response body by reading `limit` number of bytes.
+   * @param opts.limit Number of bytes to read (optional) - Default: 131072
+   * @param opts.signal AbortSignal to cancel the operation (optional)
+   */
+  dump (opts?: { limit: number; signal?: AbortSignal }): Promise<void>
+}
diff --git a/mqtt-backend/node_modules/undici-types/retry-agent.d.ts b/mqtt-backend/node_modules/undici-types/retry-agent.d.ts
new file mode 100644
index 0000000..82268c3
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/retry-agent.d.ts
@@ -0,0 +1,8 @@
+import Dispatcher from './dispatcher'
+import RetryHandler from './retry-handler'
+
+export default RetryAgent
+
+declare class RetryAgent extends Dispatcher {
+  constructor (dispatcher: Dispatcher, options?: RetryHandler.RetryOptions)
+}
diff --git a/mqtt-backend/node_modules/undici-types/retry-handler.d.ts b/mqtt-backend/node_modules/undici-types/retry-handler.d.ts
new file mode 100644
index 0000000..3bc484b
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/retry-handler.d.ts
@@ -0,0 +1,125 @@
+import Dispatcher from './dispatcher'
+
+export default RetryHandler
+
+declare class RetryHandler implements Dispatcher.DispatchHandler {
+  constructor (
+    options: Dispatcher.DispatchOptions & {
+      retryOptions?: RetryHandler.RetryOptions;
+    },
+    retryHandlers: RetryHandler.RetryHandlers
+  )
+}
+
+declare namespace RetryHandler {
+  export type RetryState = { counter: number; }
+
+  export type RetryContext = {
+    state: RetryState;
+    opts: Dispatcher.DispatchOptions & {
+      retryOptions?: RetryHandler.RetryOptions;
+    };
+  }
+
+  export type OnRetryCallback = (result?: Error | null) => void
+
+  export type RetryCallback = (
+    err: Error,
+    context: {
+      state: RetryState;
+      opts: Dispatcher.DispatchOptions & {
+        retryOptions?: RetryHandler.RetryOptions;
+      };
+    },
+    callback: OnRetryCallback
+  ) => void
+
+  export interface RetryOptions {
+    /**
+     * If true, the retry handler will throw an error if the request fails,
+     * this will prevent the folling handlers from being called, and will destroy the socket.
+     *
+     * @type {boolean}
+     * @memberof RetryOptions
+     * @default true
+     */
+    throwOnError?: boolean;
+    /**
+     * Callback to be invoked on every retry iteration.
+     * It receives the error, current state of the retry object and the options object
+     * passed when instantiating the retry handler.
+     *
+     * @type {RetryCallback}
+     * @memberof RetryOptions
+     */
+    retry?: RetryCallback;
+    /**
+     * Maximum number of retries to allow.
+     *
+     * @type {number}
+     * @memberof RetryOptions
+     * @default 5
+     */
+    maxRetries?: number;
+    /**
+     * Max number of milliseconds allow between retries
+     *
+     * @type {number}
+     * @memberof RetryOptions
+     * @default 30000
+     */
+    maxTimeout?: number;
+    /**
+     * Initial number of milliseconds to wait before retrying for the first time.
+     *
+     * @type {number}
+     * @memberof RetryOptions
+     * @default 500
+     */
+    minTimeout?: number;
+    /**
+     * Factior to multiply the timeout factor between retries.
+     *
+     * @type {number}
+     * @memberof RetryOptions
+     * @default 2
+     */
+    timeoutFactor?: number;
+    /**
+     * It enables to automatically infer timeout between retries based on the `Retry-After` header.
+     *
+     * @type {boolean}
+     * @memberof RetryOptions
+     * @default true
+     */
+    retryAfter?: boolean;
+    /**
+     * HTTP methods to retry.
+     *
+     * @type {Dispatcher.HttpMethod[]}
+     * @memberof RetryOptions
+     * @default ['GET', 'HEAD', 'OPTIONS', 'PUT', 'DELETE', 'TRACE'],
+     */
+    methods?: Dispatcher.HttpMethod[];
+    /**
+     * Error codes to be retried. e.g. `ECONNRESET`, `ENOTFOUND`, `ETIMEDOUT`, `ECONNREFUSED`, etc.
+     *
+     * @type {string[]}
+     * @default ['ECONNRESET','ECONNREFUSED','ENOTFOUND','ENETDOWN','ENETUNREACH','EHOSTDOWN','EHOSTUNREACH','EPIPE']
+     */
+    errorCodes?: string[];
+    /**
+     * HTTP status codes to be retried.
+     *
+     * @type {number[]}
+     * @memberof RetryOptions
+     * @default [500, 502, 503, 504, 429],
+     */
+    statusCodes?: number[];
+  }
+
+  export interface RetryHandlers {
+    dispatch: Dispatcher['dispatch'];
+    handler: Dispatcher.DispatchHandler;
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/round-robin-pool.d.ts b/mqtt-backend/node_modules/undici-types/round-robin-pool.d.ts
new file mode 100644
index 0000000..05ce210
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/round-robin-pool.d.ts
@@ -0,0 +1,41 @@
+import Client from './client'
+import TPoolStats from './pool-stats'
+import { URL } from 'node:url'
+import Dispatcher from './dispatcher'
+
+export default RoundRobinPool
+
+type RoundRobinPoolConnectOptions = Omit<Dispatcher.ConnectOptions, 'origin'>
+
+declare class RoundRobinPool extends Dispatcher {
+  constructor (url: string | URL, options?: RoundRobinPool.Options)
+  /** `true` after `pool.close()` has been called. */
+  closed: boolean
+  /** `true` after `pool.destroyed()` has been called or `pool.close()` has been called and the pool shutdown has completed. */
+  destroyed: boolean
+  /** Aggregate stats for a RoundRobinPool. */
+  readonly stats: TPoolStats
+
+  // Override dispatcher APIs.
+  override connect (
+    options: RoundRobinPoolConnectOptions
+  ): Promise<Dispatcher.ConnectData>
+  override connect (
+    options: RoundRobinPoolConnectOptions,
+    callback: (err: Error | null, data: Dispatcher.ConnectData) => void
+  ): void
+}
+
+declare namespace RoundRobinPool {
+  export type RoundRobinPoolStats = TPoolStats
+  export interface Options extends Client.Options {
+    /** Default: `(origin, opts) => new Client(origin, opts)`. */
+    factory?(origin: URL, opts: object): Dispatcher;
+    /** The max number of clients to create. `null` if no limit. Default `null`. */
+    connections?: number | null;
+    /** The amount of time before a client is removed from the pool and closed. `null` if no time limit. Default `null` */
+    clientTtl?: number | null;
+
+    interceptors?: { RoundRobinPool?: readonly Dispatcher.DispatchInterceptor[] } & Client.Options['interceptors']
+  }
+}
diff --git a/mqtt-backend/node_modules/undici-types/snapshot-agent.d.ts b/mqtt-backend/node_modules/undici-types/snapshot-agent.d.ts
new file mode 100644
index 0000000..f1d1ccd
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/snapshot-agent.d.ts
@@ -0,0 +1,109 @@
+import MockAgent from './mock-agent'
+
+declare class SnapshotRecorder {
+  constructor (options?: SnapshotRecorder.Options)
+
+  record (requestOpts: any, response: any): Promise<void>
+  findSnapshot (requestOpts: any): SnapshotRecorder.Snapshot | undefined
+  loadSnapshots (filePath?: string): Promise<void>
+  saveSnapshots (filePath?: string): Promise<void>
+  clear (): void
+  getSnapshots (): SnapshotRecorder.Snapshot[]
+  size (): number
+  resetCallCounts (): void
+  deleteSnapshot (requestOpts: any): boolean
+  getSnapshotInfo (requestOpts: any): SnapshotRecorder.SnapshotInfo | null
+  replaceSnapshots (snapshotData: SnapshotRecorder.SnapshotData[]): void
+  destroy (): void
+}
+
+declare namespace SnapshotRecorder {
+  type SnapshotRecorderMode = 'record' | 'playback' | 'update'
+
+  export interface Options {
+    snapshotPath?: string
+    mode?: SnapshotRecorderMode
+    maxSnapshots?: number
+    autoFlush?: boolean
+    flushInterval?: number
+    matchHeaders?: string[]
+    ignoreHeaders?: string[]
+    excludeHeaders?: string[]
+    matchBody?: boolean
+    matchQuery?: boolean
+    caseSensitive?: boolean
+    shouldRecord?: (requestOpts: any) => boolean
+    shouldPlayback?: (requestOpts: any) => boolean
+    excludeUrls?: (string | RegExp)[]
+  }
+
+  export interface Snapshot {
+    request: {
+      method: string
+      url: string
+      headers: Record<string, string>
+      body?: string
+    }
+    responses: {
+      statusCode: number
+      headers: Record<string, string>
+      body: string
+      trailers: Record<string, string>
+    }[]
+    callCount: number
+    timestamp: string
+  }
+
+  export interface SnapshotInfo {
+    hash: string
+    request: {
+      method: string
+      url: string
+      headers: Record<string, string>
+      body?: string
+    }
+    responseCount: number
+    callCount: number
+    timestamp: string
+  }
+
+  export interface SnapshotData {
+    hash: string
+    snapshot: Snapshot
+  }
+}
+
+declare class SnapshotAgent extends MockAgent {
+  constructor (options?: SnapshotAgent.Options)
+
+  saveSnapshots (filePath?: string): Promise<void>
+  loadSnapshots (filePath?: string): Promise<void>
+  getRecorder (): SnapshotRecorder
+  getMode (): SnapshotRecorder.SnapshotRecorderMode
+  clearSnapshots (): void
+  resetCallCounts (): void
+  deleteSnapshot (requestOpts: any): boolean
+  getSnapshotInfo (requestOpts: any): SnapshotRecorder.SnapshotInfo | null
+  replaceSnapshots (snapshotData: SnapshotRecorder.SnapshotData[]): void
+}
+
+declare namespace SnapshotAgent {
+  export interface Options extends MockAgent.Options {
+    mode?: SnapshotRecorder.SnapshotRecorderMode
+    snapshotPath?: string
+    maxSnapshots?: number
+    autoFlush?: boolean
+    flushInterval?: number
+    matchHeaders?: string[]
+    ignoreHeaders?: string[]
+    excludeHeaders?: string[]
+    matchBody?: boolean
+    matchQuery?: boolean
+    caseSensitive?: boolean
+    shouldRecord?: (requestOpts: any) => boolean
+    shouldPlayback?: (requestOpts: any) => boolean
+    excludeUrls?: (string | RegExp)[]
+  }
+}
+
+export { SnapshotAgent, SnapshotRecorder }
diff --git a/mqtt-backend/node_modules/undici-types/util.d.ts b/mqtt-backend/node_modules/undici-types/util.d.ts
new file mode 100644
index 0000000..8fc50cc
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/util.d.ts
@@ -0,0 +1,18 @@
+export namespace util {
+  /**
+   * Retrieves a header name and returns its lowercase value.
+   * @param value Header name
+   */
+  export function headerNameToString (value: string | Buffer): string
+
+  /**
+   * Receives a header object and returns the parsed value.
+   * @param headers Header object
+   * @param obj Object to specify a proxy object. Used to assign parsed values.
+   * @returns If `obj` is specified, it is equivalent to `obj`.
+   */
+  export function parseHeaders (
+    headers: (Buffer | string | (Buffer | string)[])[],
+    obj?: Record<string, string | string[]>
+  ): Record<string, string | string[]>
+}
diff --git a/mqtt-backend/node_modules/undici-types/utility.d.ts b/mqtt-backend/node_modules/undici-types/utility.d.ts
new file mode 100644
index 0000000..bfb3ca7
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/utility.d.ts
@@ -0,0 +1,7 @@
+type AutocompletePrimitiveBaseType<T> =
+  T extends string ? string :
+    T extends number ? number :
+      T extends boolean ? boolean :
+        never
+
+export type Autocomplete<T> = T | (AutocompletePrimitiveBaseType<T> & Record<never, never>)
diff --git a/mqtt-backend/node_modules/undici-types/webidl.d.ts b/mqtt-backend/node_modules/undici-types/webidl.d.ts
new file mode 100644
index 0000000..d2a8eb9
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/webidl.d.ts
@@ -0,0 +1,341 @@
+// These types are not exported, and are only used internally
+import * as undici from './index'
+
+/**
+ * Take in an unknown value and return one that is of type T
+ */
+type Converter<T> = (object: unknown) => T
+
+type SequenceConverter<T> = (object: unknown, iterable?: IterableIterator<T>) => T[]
+
+type RecordConverter<K extends string, V> = (object: unknown) => Record<K, V>
+
+interface WebidlErrors {
+  /**
+   * @description Instantiate an error
+   */
+  exception (opts: { header: string, message: string }): TypeError
+  /**
+   * @description Instantiate an error when conversion from one type to another has failed
+   */
+  conversionFailed (opts: {
+    prefix: string
+    argument: string
+    types: string[]
+  }): TypeError
+  /**
+   * @description Throw an error when an invalid argument is provided
+   */
+  invalidArgument (opts: {
+    prefix: string
+    value: string
+    type: string
+  }): TypeError
+}
+
+interface WebIDLTypes {
+  UNDEFINED: 1,
+  BOOLEAN: 2,
+  STRING: 3,
+  SYMBOL: 4,
+  NUMBER: 5,
+  BIGINT: 6,
+  NULL: 7
+  OBJECT: 8
+}
+
+interface WebidlUtil {
+  /**
+   * @see https://tc39.es/ecma262/#sec-ecmascript-data-types-and-values
+   */
+  Type (object: unknown): WebIDLTypes[keyof WebIDLTypes]
+
+  TypeValueToString (o: unknown):
+    | 'Undefined'
+    | 'Boolean'
+    | 'String'
+    | 'Symbol'
+    | 'Number'
+    | 'BigInt'
+    | 'Null'
+    | 'Object'
+
+  Types: WebIDLTypes
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#abstract-opdef-converttoint
+   */
+  ConvertToInt (
+    V: unknown,
+    bitLength: number,
+    signedness: 'signed' | 'unsigned',
+    flags?: number
+  ): number
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#abstract-opdef-integerpart
+   */
+  IntegerPart (N: number): number
+
+  /**
+   * Stringifies {@param V}
+   */
+  Stringify (V: any): string
+
+  MakeTypeAssertion <I>(I: I): (arg: any) => arg is I
+
+  /**
+   * Mark a value as uncloneable for Node.js.
+   * This is only effective in some newer Node.js versions.
+   */
+  markAsUncloneable (V: any): void
+
+  IsResizableArrayBuffer (V: ArrayBufferLike): boolean
+
+  HasFlag (flag: number, attributes: number): boolean
+}
+
+interface WebidlConverters {
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-DOMString
+   */
+  DOMString (V: unknown, prefix: string, argument: string, flags?: number): string
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-ByteString
+   */
+  ByteString (V: unknown, prefix: string, argument: string): string
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-USVString
+   */
+  USVString (V: unknown): string
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-boolean
+   */
+  boolean (V: unknown): boolean
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-any
+   */
+  any <Value>(V: Value): Value
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-long-long
+   */
+  ['long long'] (V: unknown): number
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-unsigned-long-long
+   */
+  ['unsigned long long'] (V: unknown): number
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-unsigned-long
+   */
+  ['unsigned long'] (V: unknown): number
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-unsigned-short
+   */
+  ['unsigned short'] (V: unknown, flags?: number): number
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#idl-ArrayBuffer
+   */
+  ArrayBuffer (
+    V: unknown,
+    prefix: string,
+    argument: string,
+    options?: { allowResizable: boolean }
+  ): ArrayBuffer
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#idl-SharedArrayBuffer
+   */
+  SharedArrayBuffer (
+    V: unknown,
+    prefix: string,
+    argument: string,
+    options?: { allowResizable: boolean }
+  ): SharedArrayBuffer
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-buffer-source-types
+   */
+  TypedArray (
+    V: unknown,
+    T: new () => NodeJS.TypedArray,
+    prefix: string,
+    argument: string,
+    flags?: number
+  ): NodeJS.TypedArray
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-buffer-source-types
+   */
+  DataView (
+    V: unknown,
+    prefix: string,
+    argument: string,
+    flags?: number
+  ): DataView
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-buffer-source-types
+   */
+  ArrayBufferView (
+    V: unknown,
+    prefix: string,
+    argument: string,
+    flags?: number
+  ): NodeJS.ArrayBufferView
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#BufferSource
+   */
+  BufferSource (
+    V: unknown,
+    prefix: string,
+    argument: string,
+    flags?: number
+  ): ArrayBuffer | NodeJS.ArrayBufferView
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#AllowSharedBufferSource
+   */
+  AllowSharedBufferSource (
+    V: unknown,
+    prefix: string,
+    argument: string,
+    flags?: number
+  ): ArrayBuffer | SharedArrayBuffer | NodeJS.ArrayBufferView
+
+  ['sequence<ByteString>']: SequenceConverter<string>
+
+  ['sequence<sequence<ByteString>>']: SequenceConverter<string[]>
+
+  ['record<ByteString, ByteString>']: RecordConverter<string, string>
+
+  /**
+  * @see https://fetch.spec.whatwg.org/#requestinfo
+  */
+  RequestInfo (V: unknown): undici.Request | string
+
+  /**
+   * @see https://fetch.spec.whatwg.org/#requestinit
+   */
+  RequestInit (V: unknown): undici.RequestInit
+
+  /**
+   * @see https://html.spec.whatwg.org/multipage/webappapis.html#eventhandlernonnull
+   */
+  EventHandlerNonNull (V: unknown): Function | null
+
+  WebSocketStreamWrite (V: unknown): ArrayBuffer | NodeJS.TypedArray | string
+
+  [Key: string]: (...args: any[]) => unknown
+}
+
+type WebidlIsFunction<T> = (arg: any) => arg is T
+
+interface WebidlIs {
+  Request: WebidlIsFunction<undici.Request>
+  Response: WebidlIsFunction<undici.Response>
+  ReadableStream: WebidlIsFunction<ReadableStream>
+  Blob: WebidlIsFunction<Blob>
+  URLSearchParams: WebidlIsFunction<URLSearchParams>
+  File: WebidlIsFunction<File>
+  FormData: WebidlIsFunction<undici.FormData>
+  URL: WebidlIsFunction<URL>
+  WebSocketError: WebidlIsFunction<undici.WebSocketError>
+  AbortSignal: WebidlIsFunction<AbortSignal>
+  MessagePort: WebidlIsFunction<MessagePort>
+  USVString: WebidlIsFunction<string>
+  /**
+   * @see https://webidl.spec.whatwg.org/#BufferSource
+   */
+  BufferSource: WebidlIsFunction<ArrayBuffer | NodeJS.TypedArray>
+}
+
+export interface Webidl {
+  errors: WebidlErrors
+  util: WebidlUtil
+  converters: WebidlConverters
+  is: WebidlIs
+  attributes: WebIDLExtendedAttributes
+
+  /**
+   * @description Performs a brand-check on {@param V} to ensure it is a
+   * {@param cls} object.
+   */
+  brandCheck <Interface extends new () => unknown>(V: unknown, cls: Interface): asserts V is Interface
+
+  brandCheckMultiple <Interfaces extends (new () => unknown)[]> (list: Interfaces): (V: any) => asserts V is Interfaces[number]
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-sequence
+   * @description Convert a value, V, to a WebIDL sequence type.
+   */
+  sequenceConverter <Type>(C: Converter<Type>): SequenceConverter<Type>
+
+  illegalConstructor (): never
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#es-to-record
+   * @description Convert a value, V, to a WebIDL record type.
+   */
+  recordConverter <K extends string, V>(
+    keyConverter: Converter<K>,
+    valueConverter: Converter<V>
+  ): RecordConverter<K, V>
+
+  /**
+   * Similar to {@link Webidl.brandCheck} but allows skipping the check if third party
+   * interfaces are allowed.
+   */
+  interfaceConverter <Interface>(typeCheck: WebidlIsFunction<Interface>, name: string): (
+    V: unknown,
+    prefix: string,
+    argument: string
+  ) => asserts V is Interface
+
+  // TODO(@KhafraDev): a type could likely be implemented that can infer the return type
+  // from the converters given?
+  /**
+   * Converts a value, V, to a WebIDL dictionary types. Allows limiting which keys are
+   * allowed, values allowed, optional and required keys. Auto converts the value to
+   * a type given a converter.
+   */
+  dictionaryConverter (converters: {
+    key: string,
+    defaultValue?: () => unknown,
+    required?: boolean,
+    converter: (...args: unknown[]) => unknown,
+    allowedValues?: unknown[]
+  }[]): (V: unknown) => Record<string, unknown>
+
+  /**
+   * @see https://webidl.spec.whatwg.org/#idl-nullable-type
+   * @description allows a type, V, to be null
+   */
+  nullableConverter <T>(
+    converter: Converter<T>
+  ): (V: unknown) => ReturnType<typeof converter> | null
+
+  argumentLengthCheck (args: { length: number }, min: number, context: string): void
+}
+
+interface WebIDLExtendedAttributes {
+  /** https://webidl.spec.whatwg.org/#Clamp */
+  Clamp: number
+  /** https://webidl.spec.whatwg.org/#EnforceRange */
+  EnforceRange: number
+  /** https://webidl.spec.whatwg.org/#AllowShared */
+  AllowShared: number
+  /** https://webidl.spec.whatwg.org/#AllowResizable */
+  AllowResizable: number
+  /** https://webidl.spec.whatwg.org/#LegacyNullToEmptyString */
+  LegacyNullToEmptyString: number
+}
diff --git a/mqtt-backend/node_modules/undici-types/websocket.d.ts b/mqtt-backend/node_modules/undici-types/websocket.d.ts
new file mode 100644
index 0000000..6d81a25
--- /dev/null
+++ b/mqtt-backend/node_modules/undici-types/websocket.d.ts
@@ -0,0 +1,186 @@
+/// <reference types="node" />
+
+import type { Blob } from 'node:buffer'
+import type { ReadableStream, WritableStream } from 'node:stream/web'
+import type { MessagePort } from 'node:worker_threads'
+import {
+  EventInit,
+  EventListenerOptions,
+  AddEventListenerOptions,
+  EventListenerOrEventListenerObject
+} from './patch'
+import Dispatcher from './dispatcher'
+import { HeadersInit } from './fetch'
+
+export type BinaryType = 'blob' | 'arraybuffer'
+
+interface WebSocketEventMap {
+  close: CloseEvent
+  error: ErrorEvent
+  message: MessageEvent
+  open: Event
+}
+
+interface WebSocket extends EventTarget {
+  binaryType: BinaryType
+
+  readonly bufferedAmount: number
+  readonly extensions: string
+
+  onclose: ((this: WebSocket, ev: WebSocketEventMap['close']) => any) | null
+  onerror: ((this: WebSocket, ev: WebSocketEventMap['error']) => any) | null
+  onmessage: ((this: WebSocket, ev: WebSocketEventMap['message']) => any) | null
+  onopen: ((this: WebSocket, ev: WebSocketEventMap['open']) => any) | null
+
+  readonly protocol: string
+  readonly readyState: number
+  readonly url: string
+
+  close(code?: number, reason?: string): void
+  send(data: string | ArrayBufferLike | Blob | ArrayBufferView): void
+
+  readonly CLOSED: number
+  readonly CLOSING: number
+  readonly CONNECTING: number
+  readonly OPEN: number
+
+  addEventListener<K extends keyof WebSocketEventMap>(
+    type: K,
+    listener: (this: WebSocket, ev: WebSocketEventMap[K]) => any,
+    options?: boolean | AddEventListenerOptions
+  ): void
+  addEventListener(
+    type: string,
+    listener: EventListenerOrEventListenerObject,
+    options?: boolean | AddEventListenerOptions
+  ): void
+  removeEventListener<K extends keyof WebSocketEventMap>(
+    type: K,
+    listener: (this: WebSocket, ev: WebSocketEventMap[K]) => any,
+    options?: boolean | EventListenerOptions
+  ): void
+  removeEventListener(
+    type: string,
+    listener: EventListenerOrEventListenerObject,
+    options?: boolean | EventListenerOptions
+  ): void
+}
+
+export declare const WebSocket: {
+  prototype: WebSocket
+  new (url: string | URL, protocols?: string | string[] | WebSocketInit): WebSocket
+  readonly CLOSED: number
+  readonly CLOSING: number
+  readonly CONNECTING: number
+  readonly OPEN: number
+}
+
+interface CloseEventInit extends EventInit {
+  code?: number
+  reason?: string
+  wasClean?: boolean
+}
+
+interface CloseEvent extends Event {
+  readonly code: number
+  readonly reason: string
+  readonly wasClean: boolean
+}
+
+export declare const CloseEvent: {
+  prototype: CloseEvent
+  new (type: string, eventInitDict?: CloseEventInit): CloseEvent
+}
+
+interface MessageEventInit<T = any> extends EventInit {
+  data?: T
+  lastEventId?: string
+  origin?: string
+  ports?: MessagePort[]
+  source?: MessagePort | null
+}
+
+interface MessageEvent<T = any> extends Event {
+  readonly data: T
+  readonly lastEventId: string
+  readonly origin: string
+  readonly ports: readonly MessagePort[]
+  readonly source: MessagePort | null
+  initMessageEvent(
+    type: string,
+    bubbles?: boolean,
+    cancelable?: boolean,
+    data?: any,
+    origin?: string,
+    lastEventId?: string,
+    source?: MessagePort | null,
+    ports?: MessagePort[]
+  ): void;
+}
+
+export declare const MessageEvent: {
+  prototype: MessageEvent
+  new<T>(type: string, eventInitDict?: MessageEventInit<T>): MessageEvent<T>
+}
+
+interface ErrorEventInit extends EventInit {
+  message?: string
+  filename?: string
+  lineno?: number
+  colno?: number
+  error?: any
+}
+
+interface ErrorEvent extends Event {
+  readonly message: string
+  readonly filename: string
+  readonly lineno: number
+  readonly colno: number
+  readonly error: Error
+}
+
+export declare const ErrorEvent: {
+  prototype: ErrorEvent
+  new (type: string, eventInitDict?: ErrorEventInit): ErrorEvent
+}
+
+interface WebSocketInit {
+  protocols?: string | string[],
+  dispatcher?: Dispatcher,
+  headers?: HeadersInit
+}
+
+interface WebSocketStreamOptions {
+  protocols?: string | string[]
+  signal?: AbortSignal
+}
+
+interface WebSocketCloseInfo {
+  closeCode: number
+  reason: string
+}
+
+interface WebSocketStream {
+  closed: Promise<WebSocketCloseInfo>
+  opened: Promise<{
+    extensions: string
+    protocol: string
+    readable: ReadableStream
+    writable: WritableStream
+  }>
+  url: string
+}
+
+export declare const WebSocketStream: {
+  prototype: WebSocketStream
+  new (url: string | URL, options?: WebSocketStreamOptions): WebSocketStream
+}
+
+interface WebSocketError extends Event, WebSocketCloseInfo {}
+
+export declare const WebSocketError: {
+  prototype: WebSocketError
+  new (type: string, init?: WebSocketCloseInfo): WebSocketError
+}
+
+export declare const ping: (ws: WebSocket, body?: Buffer) => void
diff --git a/mqtt-backend/node_modules/util-deprecate/History.md b/mqtt-backend/node_modules/util-deprecate/History.md
new file mode 100644
index 0000000..acc8675
--- /dev/null
+++ b/mqtt-backend/node_modules/util-deprecate/History.md
@@ -0,0 +1,16 @@
+
+1.0.2 / 2015-10-07
+==================
+
+  * use try/catch when checking `localStorage` (#3, @kumavis)
+
+1.0.1 / 2014-11-25
+==================
+
+  * browser: use `console.warn()` for deprecation calls
+  * browser: more jsdocs
+
+1.0.0 / 2014-04-30
+==================
+
+  * initial commit
diff --git a/mqtt-backend/node_modules/util-deprecate/LICENSE b/mqtt-backend/node_modules/util-deprecate/LICENSE
new file mode 100644
index 0000000..6a60e8c
--- /dev/null
+++ b/mqtt-backend/node_modules/util-deprecate/LICENSE
@@ -0,0 +1,24 @@
+(The MIT License)
+
+Copyright (c) 2014 Nathan Rajlich <nathan@tootallnate.net>
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/util-deprecate/README.md b/mqtt-backend/node_modules/util-deprecate/README.md
new file mode 100644
index 0000000..75622fa
--- /dev/null
+++ b/mqtt-backend/node_modules/util-deprecate/README.md
@@ -0,0 +1,53 @@
+util-deprecate
+==============
+### The Node.js `util.deprecate()` function with browser support
+
+In Node.js, this module simply re-exports the `util.deprecate()` function.
+
+In the web browser (i.e. via browserify), a browser-specific implementation
+of the `util.deprecate()` function is used.
+
+
+## API
+
+A `deprecate()` function is the only thing exposed by this module.
+
+``` javascript
+// setup:
+exports.foo = deprecate(foo, 'foo() is deprecated, use bar() instead');
+
+
+// users see:
+foo();
+// foo() is deprecated, use bar() instead
+foo();
+foo();
+```
+
+
+## License
+
+(The MIT License)
+
+Copyright (c) 2014 Nathan Rajlich <nathan@tootallnate.net>
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/util-deprecate/browser.js b/mqtt-backend/node_modules/util-deprecate/browser.js
new file mode 100644
index 0000000..549ae2f
--- /dev/null
+++ b/mqtt-backend/node_modules/util-deprecate/browser.js
@@ -0,0 +1,67 @@
+
+/**
+ * Module exports.
+ */
+
+module.exports = deprecate;
+
+/**
+ * Mark that a method should not be used.
+ * Returns a modified function which warns once by default.
+ *
+ * If `localStorage.noDeprecation = true` is set, then it is a no-op.
+ *
+ * If `localStorage.throwDeprecation = true` is set, then deprecated functions
+ * will throw an Error when invoked.
+ *
+ * If `localStorage.traceDeprecation = true` is set, then deprecated functions
+ * will invoke `console.trace()` instead of `console.error()`.
+ *
+ * @param {Function} fn - the function to deprecate
+ * @param {String} msg - the string to print to the console when `fn` is invoked
+ * @returns {Function} a new "deprecated" version of `fn`
+ * @api public
+ */
+
+function deprecate (fn, msg) {
+  if (config('noDeprecation')) {
+    return fn;
+  }
+
+  var warned = false;
+  function deprecated() {
+    if (!warned) {
+      if (config('throwDeprecation')) {
+        throw new Error(msg);
+      } else if (config('traceDeprecation')) {
+        console.trace(msg);
+      } else {
+        console.warn(msg);
+      }
+      warned = true;
+    }
+    return fn.apply(this, arguments);
+  }
+
+  return deprecated;
+}
+
+/**
+ * Checks `localStorage` for boolean values for the given `name`.
+ *
+ * @param {String} name
+ * @returns {Boolean}
+ * @api private
+ */
+
+function config (name) {
+  // accessing global.localStorage can trigger a DOMException in sandboxed iframes
+  try {
+    if (!global.localStorage) return false;
+  } catch (_) {
+    return false;
+  }
+  var val = global.localStorage[name];
+  if (null == val) return false;
+  return String(val).toLowerCase() === 'true';
+}
diff --git a/mqtt-backend/node_modules/util-deprecate/node.js b/mqtt-backend/node_modules/util-deprecate/node.js
new file mode 100644
index 0000000..5e6fcff
--- /dev/null
+++ b/mqtt-backend/node_modules/util-deprecate/node.js
@@ -0,0 +1,6 @@
+
+/**
+ * For Node.js, simply re-export the core `util.deprecate` function.
+ */
+
+module.exports = require('util').deprecate;
diff --git a/mqtt-backend/node_modules/util-deprecate/package.json b/mqtt-backend/node_modules/util-deprecate/package.json
new file mode 100644
index 0000000..2e79f89
--- /dev/null
+++ b/mqtt-backend/node_modules/util-deprecate/package.json
@@ -0,0 +1,27 @@
+{
+  "name": "util-deprecate",
+  "version": "1.0.2",
+  "description": "The Node.js `util.deprecate()` function with browser support",
+  "main": "node.js",
+  "browser": "browser.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/TooTallNate/util-deprecate.git"
+  },
+  "keywords": [
+    "util",
+    "deprecate",
+    "browserify",
+    "browser",
+    "node"
+  ],
+  "author": "Nathan Rajlich <nathan@tootallnate.net> (http://n8.io/)",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/TooTallNate/util-deprecate/issues"
+  },
+  "homepage": "https://github.com/TooTallNate/util-deprecate"
+}
diff --git a/mqtt-backend/node_modules/uuid-parse/.travis.yml b/mqtt-backend/node_modules/uuid-parse/.travis.yml
new file mode 100644
index 0000000..23273b6
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid-parse/.travis.yml
@@ -0,0 +1,4 @@
+language: node_js
+node_js:
+    - "10"
+    - "8"
diff --git a/mqtt-backend/node_modules/uuid-parse/AUTHORS b/mqtt-backend/node_modules/uuid-parse/AUTHORS
new file mode 100644
index 0000000..5d5c7b6
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid-parse/AUTHORS
@@ -0,0 +1,6 @@
+Robert Kieffer <robert@broofa.com>
+Christoph Tavan <dev@tavan.de>
+AJ ONeal <coolaj86@gmail.com>
+Vincent Voyer <vincent@zeroload.net>
+Roman Shtylman <shtylman@gmail.com>
+Brandon Belvin <brandon@sharpcoffee.com>
diff --git a/mqtt-backend/node_modules/uuid-parse/HISTORY.md b/mqtt-backend/node_modules/uuid-parse/HISTORY.md
new file mode 100644
index 0000000..12958ce
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid-parse/HISTORY.md
@@ -0,0 +1,8 @@
+# 1.1.0
+
+  * Downgraded to ES5-compatible code
+  * Marked as no longer maintained
+
+# 1.0.0
+
+  * Forked from node-uuid in order to recover and expose parse/unparse commands
diff --git a/mqtt-backend/node_modules/uuid-parse/LICENSE.md b/mqtt-backend/node_modules/uuid-parse/LICENSE.md
new file mode 100644
index 0000000..a43093b
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid-parse/LICENSE.md
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c)  2010-2012 Robert Kieffer
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/uuid-parse/README.md b/mqtt-backend/node_modules/uuid-parse/README.md
new file mode 100644
index 0000000..302e64d
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid-parse/README.md
@@ -0,0 +1,47 @@
+# uuid-parse [![Build Status](https://secure.travis-ci.org/zefferus/uuid-parse.svg?branch=parse)](http://travis-ci.org/zefferus/uuid-parse) #
+
+## NOTE: This module is no longer maintained
+
+Simple, fast parsing and unparsing of [RFC4122](http://www.ietf.org/rfc/rfc4122.txt) UUIDS.
+
+Features:
+
+* Parses and unparses UUIDs to and from Buffer to String
+
+## Quickstart
+
+```shell
+npm install uuid-parse
+```
+
+```javascript
+const uuidParse = require('uuid-parse');
+```
+
+## API
+
+### uuidParse.parse(id[, buffer[, offset]])
+### uuidParse.unparse(buffer[, offset])
+
+Parse and unparse UUIDs
+
+  * `id` - (String) UUID(-like) string
+  * `buffer` - (Array | Buffer) Array or buffer where UUID bytes are to be written. Default: A new Buffer is used
+  * `offset` - (Number) Starting index in `buffer` at which to begin writing. Default: 0
+
+Example parsing and unparsing a UUID string
+
+```javascript
+const bytes = uuidParse.parse('797ff043-11eb-11e1-80d6-510998755d10'); // -> <Buffer 79 7f f0 43 11 eb 11 e1 80 d6 51 09 98 75 5d 10>
+const string = uuidParse.unparse(bytes); // -> '797ff043-11eb-11e1-80d6-510998755d10'
+```
+
+## Testing
+
+```
+npm test
+```
+
+## Acknowledgments
+
+Please make sure to check out the repository that originated these functions: [node-uuid](https://github.com/kelektiv/node-uuid). These functions were removed from a recent version of that library and I wanted to make sure they were still exposed for the packages who were dependent on them.
diff --git a/mqtt-backend/node_modules/uuid-parse/package.json b/mqtt-backend/node_modules/uuid-parse/package.json
new file mode 100644
index 0000000..3579faf
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid-parse/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "uuid-parse",
+  "version": "1.1.0",
+  "description": "RFC4122 UUID parser",
+  "keywords": [
+    "uuid",
+    "parse",
+    "guid",
+    "rfc4122"
+  ],
+  "license": "MIT",
+  "main": "./uuid-parse.js",
+  "devDependencies": {
+    "mocha": "~6.0.0"
+  },
+  "scripts": {
+    "test": "mocha test/test.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/zefferus/uuid-parse.git"
+  }
+}
diff --git a/mqtt-backend/node_modules/uuid-parse/test/mocha.opts b/mqtt-backend/node_modules/uuid-parse/test/mocha.opts
new file mode 100644
index 0000000..5d6a311
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid-parse/test/mocha.opts
@@ -0,0 +1,3 @@
+--ui qunit
+--reporter spec
+--check-leaks
diff --git a/mqtt-backend/node_modules/uuid-parse/test/test.js b/mqtt-backend/node_modules/uuid-parse/test/test.js
new file mode 100644
index 0000000..99eaf14
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid-parse/test/test.js
@@ -0,0 +1,12 @@
+var assert = require('assert');
+
+var uuid = require('../');
+
+test('parse/unparse', function() {
+  var id = '00112233445566778899aabbccddeeff';
+  assert(uuid.unparse(uuid.parse(id.substr(0,10))) ==
+    '00112233-4400-0000-0000-000000000000', 'Short parse');
+  assert(uuid.unparse(uuid.parse('(this is the uuid -> ' + id + id)) ==
+    '00112233-4455-6677-8899-aabbccddeeff', 'Dirty parse');
+});
+
diff --git a/mqtt-backend/node_modules/uuid-parse/uuid-parse.js b/mqtt-backend/node_modules/uuid-parse/uuid-parse.js
new file mode 100644
index 0000000..9dc437b
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid-parse/uuid-parse.js
@@ -0,0 +1,48 @@
+'use strict';
+
+// Maps for number <-> hex string conversion
+var _byteToHex = [];
+var _hexToByte = {};
+for (var i = 0; i < 256; i++) {
+  _byteToHex[i] = (i + 0x100).toString(16).substr(1);
+  _hexToByte[_byteToHex[i]] = i;
+}
+
+// **`parse()` - Parse a UUID into it's component bytes**
+function parse(s, buf, offset) {
+  var i = (buf && offset) || 0;
+  var ii = 0;
+
+  buf = buf || [];
+  s.toLowerCase().replace(/[0-9a-f]{2}/g, function(oct) {
+    if (ii < 16) { // Don't overflow!
+      buf[i + ii++] = _hexToByte[oct];
+    }
+  });
+
+  // Zero out remaining bytes if string was short
+  while (ii < 16) {
+    buf[i + ii++] = 0;
+  }
+
+  return buf;
+}
+
+// **`unparse()` - Convert UUID byte array (ala parse()) into a string**
+function unparse(buf, offset) {
+  var i = offset || 0;
+  var bth = _byteToHex;
+  return  bth[buf[i++]] + bth[buf[i++]] +
+          bth[buf[i++]] + bth[buf[i++]] + '-' +
+          bth[buf[i++]] + bth[buf[i++]] + '-' +
+          bth[buf[i++]] + bth[buf[i++]] + '-' +
+          bth[buf[i++]] + bth[buf[i++]] + '-' +
+          bth[buf[i++]] + bth[buf[i++]] +
+          bth[buf[i++]] + bth[buf[i++]] +
+          bth[buf[i++]] + bth[buf[i++]];
+}
+
+module.exports = {
+  parse: parse,
+  unparse: unparse
+};
diff --git a/mqtt-backend/node_modules/uuid/CHANGELOG.md b/mqtt-backend/node_modules/uuid/CHANGELOG.md
new file mode 100644
index 0000000..f0ba9e1
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/CHANGELOG.md
@@ -0,0 +1,292 @@
+# Changelog
+
+All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
+
+## [10.0.0](https://github.com/uuidjs/uuid/compare/v9.0.0...v10.0.0) (2024-06-07)
+
+### ⚠ BREAKING CHANGES
+
+- update node support (drop node@12, node@14, add node@20) (#750)
+
+### Features
+
+- support support rfc9562 MAX uuid (new in RFC9562) ([#714](https://github.com/uuidjs/uuid/issues/714)) ([0385cd3](https://github.com/uuidjs/uuid/commit/0385cd3f18ae9920678b2849932fa7a9d9aee7d0))
+- support rfc9562 v6 uuids ([#754](https://github.com/uuidjs/uuid/issues/754)) ([c4ed13e](https://github.com/uuidjs/uuid/commit/c4ed13e7159d87c9e42a349bdd9dc955f1af46b6))
+- support rfc9562 v7 uuids ([#681](https://github.com/uuidjs/uuid/issues/681)) ([db76a12](https://github.com/uuidjs/uuid/commit/db76a1284760c441438f50a57924b322dae08891))
+- update node support matrix (only support node 16-20) ([#750](https://github.com/uuidjs/uuid/issues/750)) ([883b163](https://github.com/uuidjs/uuid/commit/883b163b9ab9d6655bfbd8a35e61a3c71674dfe1))
+- support rfc9562 v8 uuids ([#759](https://github.com/uuidjs/uuid/issues/759)) ([35a5342](https://github.com/uuidjs/uuid/commit/35a53428202657e402e6b4aa68f56c08194541bf))
+
+### Bug Fixes
+
+- revert "perf: remove superfluous call to toLowerCase ([#677](https://github.com/uuidjs/uuid/issues/677))" ([#738](https://github.com/uuidjs/uuid/issues/738)) ([e267b90](https://github.com/uuidjs/uuid/commit/e267b9073df1d0ce119ee53c0487fe76acb2be37))
+
+## [9.0.1](https://github.com/uuidjs/uuid/compare/v9.0.0...v9.0.1) (2023-09-12)
+
+### build
+
+- Fix CI to work with Node.js 20.x
+
+## [9.0.0](https://github.com/uuidjs/uuid/compare/v8.3.2...v9.0.0) (2022-09-05)
+
+### ⚠ BREAKING CHANGES
+
+- Drop Node.js 10.x support. This library always aims at supporting one EOLed LTS release which by this time now is 12.x which has reached EOL 30 Apr 2022.
+
+- Remove the minified UMD build from the package.
+
+  Minified code is hard to audit and since this is a widely used library it seems more appropriate nowadays to optimize for auditability than to ship a legacy module format that, at best, serves educational purposes nowadays.
+
+  For production browser use cases, users should be using a bundler. For educational purposes, today's online sandboxes like replit.com offer convenient ways to load npm modules, so the use case for UMD through repos like UNPKG or jsDelivr has largely vanished.
+
+- Drop IE 11 and Safari 10 support. Drop support for browsers that don't correctly implement const/let and default arguments, and no longer transpile the browser build to ES2015.
+
+  This also removes the fallback on msCrypto instead of the crypto API.
+
+  Browser tests are run in the first supported version of each supported browser and in the latest (as of this commit) version available on Browserstack.
+
+### Features
+
+- optimize uuid.v1 by 1.3x uuid.v4 by 4.3x (430%) ([#597](https://github.com/uuidjs/uuid/issues/597)) ([3a033f6](https://github.com/uuidjs/uuid/commit/3a033f6bab6bb3780ece6d645b902548043280bc))
+- remove UMD build ([#645](https://github.com/uuidjs/uuid/issues/645)) ([e948a0f](https://github.com/uuidjs/uuid/commit/e948a0f22bf22f4619b27bd913885e478e20fe6f)), closes [#620](https://github.com/uuidjs/uuid/issues/620)
+- use native crypto.randomUUID when available ([#600](https://github.com/uuidjs/uuid/issues/600)) ([c9e076c](https://github.com/uuidjs/uuid/commit/c9e076c852edad7e9a06baaa1d148cf4eda6c6c4))
+
+### Bug Fixes
+
+- add Jest/jsdom compatibility ([#642](https://github.com/uuidjs/uuid/issues/642)) ([16f9c46](https://github.com/uuidjs/uuid/commit/16f9c469edf46f0786164cdf4dc980743984a6fd))
+- change default export to named function ([#545](https://github.com/uuidjs/uuid/issues/545)) ([c57bc5a](https://github.com/uuidjs/uuid/commit/c57bc5a9a0653273aa639cda9177ce52efabe42a))
+- handle error when parameter is not set in v3 and v5 ([#622](https://github.com/uuidjs/uuid/issues/622)) ([fcd7388](https://github.com/uuidjs/uuid/commit/fcd73881692d9fabb63872576ba28e30ff852091))
+- run npm audit fix ([#644](https://github.com/uuidjs/uuid/issues/644)) ([04686f5](https://github.com/uuidjs/uuid/commit/04686f54c5fed2cfffc1b619f4970c4bb8532353))
+- upgrading from uuid3 broken link ([#568](https://github.com/uuidjs/uuid/issues/568)) ([1c849da](https://github.com/uuidjs/uuid/commit/1c849da6e164259e72e18636726345b13a7eddd6))
+
+### build
+
+- drop Node.js 8.x from babel transpile target ([#603](https://github.com/uuidjs/uuid/issues/603)) ([aa11485](https://github.com/uuidjs/uuid/commit/aa114858260402107ec8a1e1a825dea0a259bcb5))
+- drop support for legacy browsers (IE11, Safari 10) ([#604](https://github.com/uuidjs/uuid/issues/604)) ([0f433e5](https://github.com/uuidjs/uuid/commit/0f433e5ec444edacd53016de67db021102f36148))
+
+- drop node 10.x to upgrade dev dependencies ([#653](https://github.com/uuidjs/uuid/issues/653)) ([28a5712](https://github.com/uuidjs/uuid/commit/28a571283f8abda6b9d85e689f95b7d3ee9e282e)), closes [#643](https://github.com/uuidjs/uuid/issues/643)
+
+### [8.3.2](https://github.com/uuidjs/uuid/compare/v8.3.1...v8.3.2) (2020-12-08)
+
+### Bug Fixes
+
+- lazy load getRandomValues ([#537](https://github.com/uuidjs/uuid/issues/537)) ([16c8f6d](https://github.com/uuidjs/uuid/commit/16c8f6df2f6b09b4d6235602d6a591188320a82e)), closes [#536](https://github.com/uuidjs/uuid/issues/536)
+
+### [8.3.1](https://github.com/uuidjs/uuid/compare/v8.3.0...v8.3.1) (2020-10-04)
+
+### Bug Fixes
+
+- support expo>=39.0.0 ([#515](https://github.com/uuidjs/uuid/issues/515)) ([c65a0f3](https://github.com/uuidjs/uuid/commit/c65a0f3fa73b901959d638d1e3591dfacdbed867)), closes [#375](https://github.com/uuidjs/uuid/issues/375)
+
+## [8.3.0](https://github.com/uuidjs/uuid/compare/v8.2.0...v8.3.0) (2020-07-27)
+
+### Features
+
+- add parse/stringify/validate/version/NIL APIs ([#479](https://github.com/uuidjs/uuid/issues/479)) ([0e6c10b](https://github.com/uuidjs/uuid/commit/0e6c10ba1bf9517796ff23c052fc0468eedfd5f4)), closes [#475](https://github.com/uuidjs/uuid/issues/475) [#478](https://github.com/uuidjs/uuid/issues/478) [#480](https://github.com/uuidjs/uuid/issues/480) [#481](https://github.com/uuidjs/uuid/issues/481) [#180](https://github.com/uuidjs/uuid/issues/180)
+
+## [8.2.0](https://github.com/uuidjs/uuid/compare/v8.1.0...v8.2.0) (2020-06-23)
+
+### Features
+
+- improve performance of v1 string representation ([#453](https://github.com/uuidjs/uuid/issues/453)) ([0ee0b67](https://github.com/uuidjs/uuid/commit/0ee0b67c37846529c66089880414d29f3ae132d5))
+- remove deprecated v4 string parameter ([#454](https://github.com/uuidjs/uuid/issues/454)) ([88ce3ca](https://github.com/uuidjs/uuid/commit/88ce3ca0ba046f60856de62c7ce03f7ba98ba46c)), closes [#437](https://github.com/uuidjs/uuid/issues/437)
+- support jspm ([#473](https://github.com/uuidjs/uuid/issues/473)) ([e9f2587](https://github.com/uuidjs/uuid/commit/e9f2587a92575cac31bc1d4ae944e17c09756659))
+
+### Bug Fixes
+
+- prepare package exports for webpack 5 ([#468](https://github.com/uuidjs/uuid/issues/468)) ([8d6e6a5](https://github.com/uuidjs/uuid/commit/8d6e6a5f8965ca9575eb4d92e99a43435f4a58a8))
+
+## [8.1.0](https://github.com/uuidjs/uuid/compare/v8.0.0...v8.1.0) (2020-05-20)
+
+### Features
+
+- improve v4 performance by reusing random number array ([#435](https://github.com/uuidjs/uuid/issues/435)) ([bf4af0d](https://github.com/uuidjs/uuid/commit/bf4af0d711b4d2ed03d1f74fd12ad0baa87dc79d))
+- optimize V8 performance of bytesToUuid ([#434](https://github.com/uuidjs/uuid/issues/434)) ([e156415](https://github.com/uuidjs/uuid/commit/e156415448ec1af2351fa0b6660cfb22581971f2))
+
+### Bug Fixes
+
+- export package.json required by react-native and bundlers ([#449](https://github.com/uuidjs/uuid/issues/449)) ([be1c8fe](https://github.com/uuidjs/uuid/commit/be1c8fe9a3206c358e0059b52fafd7213aa48a52)), closes [ai/nanoevents#44](https://github.com/ai/nanoevents/issues/44#issuecomment-602010343) [#444](https://github.com/uuidjs/uuid/issues/444)
+
+## [8.0.0](https://github.com/uuidjs/uuid/compare/v7.0.3...v8.0.0) (2020-04-29)
+
+### ⚠ BREAKING CHANGES
+
+- For native ECMAScript Module (ESM) usage in Node.js only named exports are exposed, there is no more default export.
+
+  ```diff
+  -import uuid from 'uuid';
+  -console.log(uuid.v4()); // -> 'cd6c3b08-0adc-4f4b-a6ef-36087a1c9869'
+  +import { v4 as uuidv4 } from 'uuid';
+  +uuidv4(); // ⇨ '9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d'
+  ```
+
+- Deep requiring specific algorithms of this library like `require('uuid/v4')`, which has been deprecated in `uuid@7`, is no longer supported.
+
+  Instead use the named exports that this module exports.
+
+  For ECMAScript Modules (ESM):
+
+  ```diff
+  -import uuidv4 from 'uuid/v4';
+  +import { v4 as uuidv4 } from 'uuid';
+  uuidv4();
+  ```
+
+  For CommonJS:
+
+  ```diff
+  -const uuidv4 = require('uuid/v4');
+  +const { v4: uuidv4 } = require('uuid');
+  uuidv4();
+  ```
+
+### Features
+
+- native Node.js ES Modules (wrapper approach) ([#423](https://github.com/uuidjs/uuid/issues/423)) ([2d9f590](https://github.com/uuidjs/uuid/commit/2d9f590ad9701d692625c07ed62f0a0f91227991)), closes [#245](https://github.com/uuidjs/uuid/issues/245) [#419](https://github.com/uuidjs/uuid/issues/419) [#342](https://github.com/uuidjs/uuid/issues/342)
+- remove deep requires ([#426](https://github.com/uuidjs/uuid/issues/426)) ([daf72b8](https://github.com/uuidjs/uuid/commit/daf72b84ceb20272a81bb5fbddb05dd95922cbba))
+
+### Bug Fixes
+
+- add CommonJS syntax example to README quickstart section ([#417](https://github.com/uuidjs/uuid/issues/417)) ([e0ec840](https://github.com/uuidjs/uuid/commit/e0ec8402c7ad44b7ef0453036c612f5db513fda0))
+
+### [7.0.3](https://github.com/uuidjs/uuid/compare/v7.0.2...v7.0.3) (2020-03-31)
+
+### Bug Fixes
+
+- make deep require deprecation warning work in browsers ([#409](https://github.com/uuidjs/uuid/issues/409)) ([4b71107](https://github.com/uuidjs/uuid/commit/4b71107d8c0d2ef56861ede6403fc9dc35a1e6bf)), closes [#408](https://github.com/uuidjs/uuid/issues/408)
+
+### [7.0.2](https://github.com/uuidjs/uuid/compare/v7.0.1...v7.0.2) (2020-03-04)
+
+### Bug Fixes
+
+- make access to msCrypto consistent ([#393](https://github.com/uuidjs/uuid/issues/393)) ([8bf2a20](https://github.com/uuidjs/uuid/commit/8bf2a20f3565df743da7215eebdbada9d2df118c))
+- simplify link in deprecation warning ([#391](https://github.com/uuidjs/uuid/issues/391)) ([bb2c8e4](https://github.com/uuidjs/uuid/commit/bb2c8e4e9f4c5f9c1eaaf3ea59710c633cd90cb7))
+- update links to match content in readme ([#386](https://github.com/uuidjs/uuid/issues/386)) ([44f2f86](https://github.com/uuidjs/uuid/commit/44f2f86e9d2bbf14ee5f0f00f72a3db1292666d4))
+
+### [7.0.1](https://github.com/uuidjs/uuid/compare/v7.0.0...v7.0.1) (2020-02-25)
+
+### Bug Fixes
+
+- clean up esm builds for node and browser ([#383](https://github.com/uuidjs/uuid/issues/383)) ([59e6a49](https://github.com/uuidjs/uuid/commit/59e6a49e7ce7b3e8fb0f3ee52b9daae72af467dc))
+- provide browser versions independent from module system ([#380](https://github.com/uuidjs/uuid/issues/380)) ([4344a22](https://github.com/uuidjs/uuid/commit/4344a22e7aed33be8627eeaaf05360f256a21753)), closes [#378](https://github.com/uuidjs/uuid/issues/378)
+
+## [7.0.0](https://github.com/uuidjs/uuid/compare/v3.4.0...v7.0.0) (2020-02-24)
+
+### ⚠ BREAKING CHANGES
+
+- The default export, which used to be the v4() method but which was already discouraged in v3.x of this library, has been removed.
+- Explicitly note that deep imports of the different uuid version functions are deprecated and no longer encouraged and that ECMAScript module named imports should be used instead. Emit a deprecation warning for people who deep-require the different algorithm variants.
+- Remove builtin support for insecure random number generators in the browser. Users who want that will have to supply their own random number generator function.
+- Remove support for generating v3 and v5 UUIDs in Node.js<4.x
+- Convert code base to ECMAScript Modules (ESM) and release CommonJS build for node and ESM build for browser bundlers.
+
+### Features
+
+- add UMD build to npm package ([#357](https://github.com/uuidjs/uuid/issues/357)) ([4e75adf](https://github.com/uuidjs/uuid/commit/4e75adf435196f28e3fbbe0185d654b5ded7ca2c)), closes [#345](https://github.com/uuidjs/uuid/issues/345)
+- add various es module and CommonJS examples ([b238510](https://github.com/uuidjs/uuid/commit/b238510bf352463521f74bab175a3af9b7a42555))
+- ensure that docs are up-to-date in CI ([ee5e77d](https://github.com/uuidjs/uuid/commit/ee5e77db547474f5a8f23d6c857a6d399209986b))
+- hybrid CommonJS & ECMAScript modules build ([a3f078f](https://github.com/uuidjs/uuid/commit/a3f078faa0baff69ab41aed08e041f8f9c8993d0))
+- remove insecure fallback random number generator ([3a5842b](https://github.com/uuidjs/uuid/commit/3a5842b141a6e5de0ae338f391661e6b84b167c9)), closes [#173](https://github.com/uuidjs/uuid/issues/173)
+- remove support for pre Node.js v4 Buffer API ([#356](https://github.com/uuidjs/uuid/issues/356)) ([b59b5c5](https://github.com/uuidjs/uuid/commit/b59b5c5ecad271c5453f1a156f011671f6d35627))
+- rename repository to github:uuidjs/uuid ([#351](https://github.com/uuidjs/uuid/issues/351)) ([c37a518](https://github.com/uuidjs/uuid/commit/c37a518e367ac4b6d0aa62dba1bc6ce9e85020f7)), closes [#338](https://github.com/uuidjs/uuid/issues/338)
+
+### Bug Fixes
+
+- add deep-require proxies for local testing and adjust tests ([#365](https://github.com/uuidjs/uuid/issues/365)) ([7fedc79](https://github.com/uuidjs/uuid/commit/7fedc79ac8fda4bfd1c566c7f05ef4ac13b2db48))
+- add note about removal of default export ([#372](https://github.com/uuidjs/uuid/issues/372)) ([12749b7](https://github.com/uuidjs/uuid/commit/12749b700eb49db8a9759fd306d8be05dbfbd58c)), closes [#370](https://github.com/uuidjs/uuid/issues/370)
+- deprecated deep requiring of the different algorithm versions ([#361](https://github.com/uuidjs/uuid/issues/361)) ([c0bdf15](https://github.com/uuidjs/uuid/commit/c0bdf15e417639b1aeb0b247b2fb11f7a0a26b23))
+
+## [3.4.0](https://github.com/uuidjs/uuid/compare/v3.3.3...v3.4.0) (2020-01-16)
+
+### Features
+
+- rename repository to github:uuidjs/uuid ([#351](https://github.com/uuidjs/uuid/issues/351)) ([e2d7314](https://github.com/uuidjs/uuid/commit/e2d7314)), closes [#338](https://github.com/uuidjs/uuid/issues/338)
+
+## [3.3.3](https://github.com/uuidjs/uuid/compare/v3.3.2...v3.3.3) (2019-08-19)
+
+### Bug Fixes
+
+- no longer run ci tests on node v4
+- upgrade dependencies
+
+## [3.3.2](https://github.com/uuidjs/uuid/compare/v3.3.1...v3.3.2) (2018-06-28)
+
+### Bug Fixes
+
+- typo ([305d877](https://github.com/uuidjs/uuid/commit/305d877))
+
+## [3.3.1](https://github.com/uuidjs/uuid/compare/v3.3.0...v3.3.1) (2018-06-28)
+
+### Bug Fixes
+
+- fix [#284](https://github.com/uuidjs/uuid/issues/284) by setting function name in try-catch ([f2a60f2](https://github.com/uuidjs/uuid/commit/f2a60f2))
+
+# [3.3.0](https://github.com/uuidjs/uuid/compare/v3.2.1...v3.3.0) (2018-06-22)
+
+### Bug Fixes
+
+- assignment to readonly property to allow running in strict mode ([#270](https://github.com/uuidjs/uuid/issues/270)) ([d062fdc](https://github.com/uuidjs/uuid/commit/d062fdc))
+- fix [#229](https://github.com/uuidjs/uuid/issues/229) ([c9684d4](https://github.com/uuidjs/uuid/commit/c9684d4))
+- Get correct version of IE11 crypto ([#274](https://github.com/uuidjs/uuid/issues/274)) ([153d331](https://github.com/uuidjs/uuid/commit/153d331))
+- mem issue when generating uuid ([#267](https://github.com/uuidjs/uuid/issues/267)) ([c47702c](https://github.com/uuidjs/uuid/commit/c47702c))
+
+### Features
+
+- enforce Conventional Commit style commit messages ([#282](https://github.com/uuidjs/uuid/issues/282)) ([cc9a182](https://github.com/uuidjs/uuid/commit/cc9a182))
+
+## [3.2.1](https://github.com/uuidjs/uuid/compare/v3.2.0...v3.2.1) (2018-01-16)
+
+### Bug Fixes
+
+- use msCrypto if available. Fixes [#241](https://github.com/uuidjs/uuid/issues/241) ([#247](https://github.com/uuidjs/uuid/issues/247)) ([1fef18b](https://github.com/uuidjs/uuid/commit/1fef18b))
+
+# [3.2.0](https://github.com/uuidjs/uuid/compare/v3.1.0...v3.2.0) (2018-01-16)
+
+### Bug Fixes
+
+- remove mistakenly added typescript dependency, rollback version (standard-version will auto-increment) ([09fa824](https://github.com/uuidjs/uuid/commit/09fa824))
+- use msCrypto if available. Fixes [#241](https://github.com/uuidjs/uuid/issues/241) ([#247](https://github.com/uuidjs/uuid/issues/247)) ([1fef18b](https://github.com/uuidjs/uuid/commit/1fef18b))
+
+### Features
+
+- Add v3 Support ([#217](https://github.com/uuidjs/uuid/issues/217)) ([d94f726](https://github.com/uuidjs/uuid/commit/d94f726))
+
+# [3.1.0](https://github.com/uuidjs/uuid/compare/v3.1.0...v3.0.1) (2017-06-17)
+
+### Bug Fixes
+
+- (fix) Add .npmignore file to exclude test/ and other non-essential files from packing. (#183)
+- Fix typo (#178)
+- Simple typo fix (#165)
+
+### Features
+
+- v5 support in CLI (#197)
+- V5 support (#188)
+
+# 3.0.1 (2016-11-28)
+
+- split uuid versions into separate files
+
+# 3.0.0 (2016-11-17)
+
+- remove .parse and .unparse
+
+# 2.0.0
+
+- Removed uuid.BufferClass
+
+# 1.4.0
+
+- Improved module context detection
+- Removed public RNG functions
+
+# 1.3.2
+
+- Improve tests and handling of v1() options (Issue #24)
+- Expose RNG option to allow for perf testing with different generators
+
+# 1.3.0
+
+- Support for version 1 ids, thanks to [@ctavan](https://github.com/ctavan)!
+- Support for node.js crypto API
+- De-emphasizing performance in favor of a) cryptographic quality PRNGs where available and b) more manageable code
diff --git a/mqtt-backend/node_modules/uuid/CONTRIBUTING.md b/mqtt-backend/node_modules/uuid/CONTRIBUTING.md
new file mode 100644
index 0000000..4a4503d
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/CONTRIBUTING.md
@@ -0,0 +1,18 @@
+# Contributing
+
+Please feel free to file GitHub Issues or propose Pull Requests. We're always happy to discuss improvements to this library!
+
+## Testing
+
+```shell
+npm test
+```
+
+## Releasing
+
+Releases are supposed to be done from master, version bumping is automated through [`standard-version`](https://github.com/conventional-changelog/standard-version):
+
+```shell
+npm run release -- --dry-run  # verify output manually
+npm run release               # follow the instructions from the output of this command
+```
diff --git a/mqtt-backend/node_modules/uuid/LICENSE.md b/mqtt-backend/node_modules/uuid/LICENSE.md
new file mode 100644
index 0000000..3934168
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/LICENSE.md
@@ -0,0 +1,9 @@
+The MIT License (MIT)
+
+Copyright (c) 2010-2020 Robert Kieffer and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/uuid/README.md b/mqtt-backend/node_modules/uuid/README.md
new file mode 100644
index 0000000..b9079b6
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/README.md
@@ -0,0 +1,584 @@
+<!--
+  -- This file is auto-generated from README_js.md. Changes should be made there.
+  -->
+
+
+# uuid [![CI](https://github.com/uuidjs/uuid/workflows/CI/badge.svg)](https://github.com/uuidjs/uuid/actions?query=workflow%3ACI) [![Browser](https://github.com/uuidjs/uuid/workflows/Browser/badge.svg)](https://github.com/uuidjs/uuid/actions?query=workflow%3ABrowser)
+
+For the creation of [RFC9562](https://www.rfc-editor.org/rfc/rfc9562.html) (formally [RFC4122](https://www.rfc-editor.org/rfc/rfc4122.html)) UUIDs
+
+- **Complete** - Support for all RFC9562 (nee RFC4122) UUID versions
+- **Cross-platform** - Support for ...
+  - CommonJS, [ECMAScript Modules](#ecmascript-modules) and [CDN builds](#cdn-builds)
+  - NodeJS 16+ ([LTS releases](https://github.com/nodejs/Release))
+  - Chrome, Safari, Firefox, Edge browsers
+  - Webpack and rollup.js module bundlers
+  - [React Native / Expo](#react-native--expo)
+- **Secure** - Cryptographically-strong random values
+- **Small** - Zero-dependency, small footprint, plays nice with "tree shaking" packagers
+- **CLI** - Includes the [`uuid` command line](#command-line) utility
+
+<!-- prettier-ignore -->
+> [!NOTE]
+> Upgrading from `uuid@3`? Your code is probably okay, but check out [Upgrading From `uuid@3`](#upgrading-from-uuid3) for details.
+
+<!-- prettier-ignore -->
+> [!NOTE]
+> Only interested in creating a version 4 UUID? You might be able to use [`crypto.randomUUID()`](https://developer.mozilla.org/en-US/docs/Web/API/Crypto/randomUUID), eliminating the need to install this library.
+
+## Quickstart
+
+To create a random UUID...
+
+**1. Install**
+
+```shell
+npm install uuid
+```
+
+**2. Create a UUID** (ES6 module syntax)
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+uuidv4(); // ⇨ '9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d'
+```
+
+... or using CommonJS syntax:
+
+```javascript
+const { v4: uuidv4 } = require('uuid');
+uuidv4(); // ⇨ '1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed'
+```
+
+For timestamp UUIDs, namespace UUIDs, and other options read on ...
+
+## API Summary
+
+|  |  |  |
+| --- | --- | --- |
+| [`uuid.NIL`](#uuidnil) | The nil UUID string (all zeros) | New in `uuid@8.3` |
+| [`uuid.MAX`](#uuidmax) | The max UUID string (all ones) | New in `uuid@9.1` |
+| [`uuid.parse()`](#uuidparsestr) | Convert UUID string to array of bytes | New in `uuid@8.3` |
+| [`uuid.stringify()`](#uuidstringifyarr-offset) | Convert array of bytes to UUID string | New in `uuid@8.3` |
+| [`uuid.v1()`](#uuidv1options-buffer-offset) | Create a version 1 (timestamp) UUID |  |
+| [`uuid.v1ToV6()`](#uuidv1tov6uuid) | Create a version 6 UUID from a version 1 UUID | New in `uuid@10` |
+| [`uuid.v3()`](#uuidv3name-namespace-buffer-offset) | Create a version 3 (namespace w/ MD5) UUID |  |
+| [`uuid.v4()`](#uuidv4options-buffer-offset) | Create a version 4 (random) UUID |  |
+| [`uuid.v5()`](#uuidv5name-namespace-buffer-offset) | Create a version 5 (namespace w/ SHA-1) UUID |  |
+| [`uuid.v6()`](#uuidv6options-buffer-offset) | Create a version 6 (timestamp, reordered) UUID | New in `uuid@10` |
+| [`uuid.v6ToV1()`](#uuidv6tov1uuid) | Create a version 1 UUID from a version 6 UUID | New in `uuid@10` |
+| [`uuid.v7()`](#uuidv7options-buffer-offset) | Create a version 7 (Unix Epoch time-based) UUID | New in `uuid@10` |
+| ~~[`uuid.v8()`](#uuidv8)~~ | "Intentionally left blank" |  |
+| [`uuid.validate()`](#uuidvalidatestr) | Test a string to see if it is a valid UUID | New in `uuid@8.3` |
+| [`uuid.version()`](#uuidversionstr) | Detect RFC version of a UUID | New in `uuid@8.3` |
+
+## API
+
+### uuid.NIL
+
+The nil UUID string (all zeros).
+
+Example:
+
+```javascript
+import { NIL as NIL_UUID } from 'uuid';
+
+NIL_UUID; // ⇨ '00000000-0000-0000-0000-000000000000'
+```
+
+### uuid.MAX
+
+The max UUID string (all ones).
+
+Example:
+
+```javascript
+import { MAX as MAX_UUID } from 'uuid';
+
+MAX_UUID; // ⇨ 'ffffffff-ffff-ffff-ffff-ffffffffffff'
+```
+
+### uuid.parse(str)
+
+Convert UUID string to array of bytes
+
+|           |                                          |
+| --------- | ---------------------------------------- |
+| `str`     | A valid UUID `String`                    |
+| _returns_ | `Uint8Array[16]`                         |
+| _throws_  | `TypeError` if `str` is not a valid UUID |
+
+<!-- prettier-ignore -->
+> [!NOTE]
+> Ordering of values in the byte arrays used by `parse()` and `stringify()` follows the left &Rarr; right order of hex-pairs in UUID strings. As shown in the example below.
+
+Example:
+
+```javascript
+import { parse as uuidParse } from 'uuid';
+
+// Parse a UUID
+const bytes = uuidParse('6ec0bd7f-11c0-43da-975e-2a8ad9ebae0b');
+
+// Convert to hex strings to show byte order (for documentation purposes)
+[...bytes].map((v) => v.toString(16).padStart(2, '0')); // ⇨
+  // [
+  //   '6e', 'c0', 'bd', '7f',
+  //   '11', 'c0', '43', 'da',
+  //   '97', '5e', '2a', '8a',
+  //   'd9', 'eb', 'ae', '0b'
+  // ]
+```
+
+### uuid.stringify(arr[, offset])
+
+Convert array of bytes to UUID string
+
+|                |                                                                              |
+| -------------- | ---------------------------------------------------------------------------- |
+| `arr`          | `Array`-like collection of 16 values (starting from `offset`) between 0-255. |
+| [`offset` = 0] | `Number` Starting index in the Array                                         |
+| _returns_      | `String`                                                                     |
+| _throws_       | `TypeError` if a valid UUID string cannot be generated                       |
+
+<!-- prettier-ignore -->
+> [!NOTE]
+> Ordering of values in the byte arrays used by `parse()` and `stringify()` follows the left &Rarr; right order of hex-pairs in UUID strings. As shown in the example below.
+
+Example:
+
+```javascript
+import { stringify as uuidStringify } from 'uuid';
+
+const uuidBytes = [
+  0x6e, 0xc0, 0xbd, 0x7f, 0x11, 0xc0, 0x43, 0xda, 0x97, 0x5e, 0x2a, 0x8a, 0xd9, 0xeb, 0xae, 0x0b,
+];
+
+uuidStringify(uuidBytes); // ⇨ '6ec0bd7f-11c0-43da-975e-2a8ad9ebae0b'
+```
+
+### uuid.v1([options[, buffer[, offset]]])
+
+Create an RFC version 1 (timestamp) UUID
+
+|  |  |
+| --- | --- |
+| [`options`] | `Object` with one or more of the following properties: |
+| [`options.node` ] | RFC "node" field as an `Array[6]` of byte values (per 4.1.6) |
+| [`options.clockseq`] | RFC "clock sequence" as a `Number` between 0 - 0x3fff |
+| [`options.msecs`] | RFC "timestamp" field (`Number` of milliseconds, unix epoch) |
+| [`options.nsecs`] | RFC "timestamp" field (`Number` of nanoseconds to add to `msecs`, should be 0-10,000) |
+| [`options.random`] | `Array` of 16 random bytes (0-255) |
+| [`options.rng`] | Alternative to `options.random`, a `Function` that returns an `Array` of 16 random bytes (0-255) |
+| [`buffer`] | `Array \| Buffer` If specified, uuid will be written here in byte-form, starting at `offset` |
+| [`offset` = 0] | `Number` Index to start writing UUID bytes in `buffer` |
+| _returns_ | UUID `String` if no `buffer` is specified, otherwise returns `buffer` |
+| _throws_ | `Error` if more than 10M UUIDs/sec are requested |
+
+<!-- prettier-ignore -->
+> [!NOTE]
+> The default [node id](https://datatracker.ietf.org/doc/html/rfc9562#section-5.1) (the last 12 digits in the UUID) is generated once, randomly, on process startup, and then remains unchanged for the duration of the process.
+
+<!-- prettier-ignore -->
+> [!NOTE]
+> `options.random` and `options.rng` are only meaningful on the very first call to `v1()`, where they may be passed to initialize the internal `node` and `clockseq` fields.
+
+Example:
+
+```javascript
+import { v1 as uuidv1 } from 'uuid';
+
+uuidv1(); // ⇨ '2c5ea4c0-4067-11e9-8bad-9b1deb4d3b7d'
+```
+
+Example using `options`:
+
+```javascript
+import { v1 as uuidv1 } from 'uuid';
+
+const options = {
+  node: [0x01, 0x23, 0x45, 0x67, 0x89, 0xab],
+  clockseq: 0x1234,
+  msecs: new Date('2011-11-01').getTime(),
+  nsecs: 5678,
+};
+uuidv1(options); // ⇨ '710b962e-041c-11e1-9234-0123456789ab'
+```
+
+### uuid.v1ToV6(uuid)
+
+Convert a UUID from version 1 to version 6
+
+```javascript
+import { v1ToV6 } from 'uuid';
+
+v1ToV6('92f62d9e-22c4-11ef-97e9-325096b39f47'); // ⇨ '1ef22c49-2f62-6d9e-97e9-325096b39f47'
+```
+
+### uuid.v3(name, namespace[, buffer[, offset]])
+
+Create an RFC version 3 (namespace w/ MD5) UUID
+
+API is identical to `v5()`, but uses "v3" instead.
+
+<!-- prettier-ignore -->
+> [!IMPORTANT]
+> Per the RFC, "_If backward compatibility is not an issue, SHA-1 [Version 5] is preferred_."
+
+### uuid.v4([options[, buffer[, offset]]])
+
+Create an RFC version 4 (random) UUID
+
+|  |  |
+| --- | --- |
+| [`options`] | `Object` with one or more of the following properties: |
+| [`options.random`] | `Array` of 16 random bytes (0-255) |
+| [`options.rng`] | Alternative to `options.random`, a `Function` that returns an `Array` of 16 random bytes (0-255) |
+| [`buffer`] | `Array \| Buffer` If specified, uuid will be written here in byte-form, starting at `offset` |
+| [`offset` = 0] | `Number` Index to start writing UUID bytes in `buffer` |
+| _returns_ | UUID `String` if no `buffer` is specified, otherwise returns `buffer` |
+
+Example:
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+
+uuidv4(); // ⇨ '1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed'
+```
+
+Example using predefined `random` values:
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+
+const v4options = {
+  random: [
+    0x10, 0x91, 0x56, 0xbe, 0xc4, 0xfb, 0xc1, 0xea, 0x71, 0xb4, 0xef, 0xe1, 0x67, 0x1c, 0x58, 0x36,
+  ],
+};
+uuidv4(v4options); // ⇨ '109156be-c4fb-41ea-b1b4-efe1671c5836'
+```
+
+### uuid.v5(name, namespace[, buffer[, offset]])
+
+Create an RFC version 5 (namespace w/ SHA-1) UUID
+
+|  |  |
+| --- | --- |
+| `name` | `String \| Array` |
+| `namespace` | `String \| Array[16]` Namespace UUID |
+| [`buffer`] | `Array \| Buffer` If specified, uuid will be written here in byte-form, starting at `offset` |
+| [`offset` = 0] | `Number` Index to start writing UUID bytes in `buffer` |
+| _returns_ | UUID `String` if no `buffer` is specified, otherwise returns `buffer` |
+
+<!-- prettier-ignore -->
+> [!NOTE]
+> The RFC `DNS` and `URL` namespaces are available as `v5.DNS` and `v5.URL`.
+
+Example with custom namespace:
+
+```javascript
+import { v5 as uuidv5 } from 'uuid';
+
+// Define a custom namespace.  Readers, create your own using something like
+// https://www.uuidgenerator.net/
+const MY_NAMESPACE = '1b671a64-40d5-491e-99b0-da01ff1f3341';
+
+uuidv5('Hello, World!', MY_NAMESPACE); // ⇨ '630eb68f-e0fa-5ecc-887a-7c7a62614681'
+```
+
+Example with RFC `URL` namespace:
+
+```javascript
+import { v5 as uuidv5 } from 'uuid';
+
+uuidv5('https://www.w3.org/', uuidv5.URL); // ⇨ 'c106a26a-21bb-5538-8bf2-57095d1976c1'
+```
+
+### uuid.v6([options[, buffer[, offset]]])
+
+Create an RFC version 6 (timestamp, reordered) UUID
+
+This method takes the same arguments as uuid.v1().
+
+```javascript
+import { v6 as uuidv6 } from 'uuid';
+
+uuidv6(); // ⇨ '1e940672-c5ea-64c0-8bad-9b1deb4d3b7d'
+```
+
+Example using `options`:
+
+```javascript
+import { v6 as uuidv6 } from 'uuid';
+
+const options = {
+  node: [0x01, 0x23, 0x45, 0x67, 0x89, 0xab],
+  clockseq: 0x1234,
+  msecs: new Date('2011-11-01').getTime(),
+  nsecs: 5678,
+};
+uuidv6(options); // ⇨ '1e1041c7-10b9-662e-9234-0123456789ab'
+```
+
+### uuid.v6ToV1(uuid)
+
+Convert a UUID from version 6 to version 1
+
+```javascript
+import { v6ToV1 } from 'uuid';
+
+v6ToV1('1ef22c49-2f62-6d9e-97e9-325096b39f47'); // ⇨ '92f62d9e-22c4-11ef-97e9-325096b39f47'
+```
+
+### uuid.v7([options[, buffer[, offset]]])
+
+Create an RFC version 7 (random) UUID
+
+|  |  |
+| --- | --- |
+| [`options`] | `Object` with one or more of the following properties: |
+| [`options.msecs`] | RFC "timestamp" field (`Number` of milliseconds, unix epoch) |
+| [`options.random`] | `Array` of 16 random bytes (0-255) |
+| [`options.rng`] | Alternative to `options.random`, a `Function` that returns an `Array` of 16 random bytes (0-255) |
+| [`options.seq`] | 31 bit monotonic sequence counter as `Number` between 0 - 0x7fffffff |
+| [`buffer`] | `Array \| Buffer` If specified, uuid will be written here in byte-form, starting at `offset` |
+| [`offset` = 0] | `Number` Index to start writing UUID bytes in `buffer` |
+| _returns_ | UUID `String` if no `buffer` is specified, otherwise returns `buffer` |
+
+Example:
+
+```javascript
+import { v7 as uuidv7 } from 'uuid';
+
+uuidv7(); // ⇨ '01695553-c90c-722d-9b5d-b38dfbbd4bed'
+```
+
+### ~~uuid.v8()~~
+
+**_"Intentionally left blank"_**
+
+<!-- prettier-ignore -->
+> [!NOTE]
+> Version 8 (experimental) UUIDs are "[for experimental or vendor-specific use cases](https://www.rfc-editor.org/rfc/rfc9562.html#name-uuid-version-8)".  The RFC does not define a creation algorithm for them, which is why this package does not offer a `v8()` method.  The `validate()` and `version()` methods do work with such UUIDs, however.
+
+### uuid.validate(str)
+
+Test a string to see if it is a valid UUID
+
+|           |                                                     |
+| --------- | --------------------------------------------------- |
+| `str`     | `String` to validate                                |
+| _returns_ | `true` if string is a valid UUID, `false` otherwise |
+
+Example:
+
+```javascript
+import { validate as uuidValidate } from 'uuid';
+
+uuidValidate('not a UUID'); // ⇨ false
+uuidValidate('6ec0bd7f-11c0-43da-975e-2a8ad9ebae0b'); // ⇨ true
+```
+
+Using `validate` and `version` together it is possible to do per-version validation, e.g. validate for only v4 UUIds.
+
+```javascript
+import { version as uuidVersion } from 'uuid';
+import { validate as uuidValidate } from 'uuid';
+
+function uuidValidateV4(uuid) {
+  return uuidValidate(uuid) && uuidVersion(uuid) === 4;
+}
+
+const v1Uuid = 'd9428888-122b-11e1-b85c-61cd3cbb3210';
+const v4Uuid = '109156be-c4fb-41ea-b1b4-efe1671c5836';
+
+uuidValidateV4(v4Uuid); // ⇨ true
+uuidValidateV4(v1Uuid); // ⇨ false
+```
+
+### uuid.version(str)
+
+Detect RFC version of a UUID
+
+|           |                                          |
+| --------- | ---------------------------------------- |
+| `str`     | A valid UUID `String`                    |
+| _returns_ | `Number` The RFC version of the UUID     |
+| _throws_  | `TypeError` if `str` is not a valid UUID |
+
+Example:
+
+```javascript
+import { version as uuidVersion } from 'uuid';
+
+uuidVersion('45637ec4-c85f-11ea-87d0-0242ac130003'); // ⇨ 1
+uuidVersion('6ec0bd7f-11c0-43da-975e-2a8ad9ebae0b'); // ⇨ 4
+```
+
+<!-- prettier-ignore -->
+> [!NOTE]
+> This method returns `0` for the `NIL` UUID, and `15` for the `MAX` UUID.
+
+## Command Line
+
+UUIDs can be generated from the command line using `uuid`.
+
+```shell
+$ npx uuid
+ddeb27fb-d9a0-4624-be4d-4615062daed4
+```
+
+The default is to generate version 4 UUIDS, however the other versions are supported. Type `uuid --help` for details:
+
+```shell
+$ npx uuid --help
+
+Usage:
+  uuid
+  uuid v1
+  uuid v3 <name> <namespace uuid>
+  uuid v4
+  uuid v5 <name> <namespace uuid>
+  uuid v7
+  uuid --help
+
+Note: <namespace uuid> may be "URL" or "DNS" to use the corresponding UUIDs
+defined by RFC9562
+```
+
+## ECMAScript Modules
+
+This library comes with [ECMAScript Modules](https://www.ecma-international.org/ecma-262/6.0/#sec-modules) (ESM) support for Node.js versions that support it ([example](./examples/node-esmodules/)) as well as bundlers like [rollup.js](https://rollupjs.org/guide/en/#tree-shaking) ([example](./examples/browser-rollup/)) and [webpack](https://webpack.js.org/guides/tree-shaking/) ([example](./examples/browser-webpack/)) (targeting both, Node.js and browser environments).
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+uuidv4(); // ⇨ '1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed'
+```
+
+To run the examples you must first create a dist build of this library in the module root:
+
+```shell
+npm run build
+```
+
+## CDN Builds
+
+### ECMAScript Modules
+
+To load this module directly into modern browsers that [support loading ECMAScript Modules](https://caniuse.com/#feat=es6-module) you can make use of [jspm](https://jspm.org/):
+
+```html
+<script type="module">
+  import { v4 as uuidv4 } from 'https://jspm.dev/uuid';
+  console.log(uuidv4()); // ⇨ '1b9d6bcd-bbfd-4b2d-9b5d-ab8dfbbd4bed'
+</script>
+```
+
+### UMD
+
+As of `uuid@9` [UMD (Universal Module Definition)](https://github.com/umdjs/umd) builds are no longer shipped with this library.
+
+If you need a UMD build of this library, use a bundler like Webpack or Rollup. Alternatively, refer to the documentation of [`uuid@8.3.2`](https://github.com/uuidjs/uuid/blob/v8.3.2/README.md#umd) which was the last version that shipped UMD builds.
+
+## Known issues
+
+### Duplicate UUIDs (Googlebot)
+
+This module may generate duplicate UUIDs when run in clients with _deterministic_ random number generators, such as [Googlebot crawlers](https://developers.google.com/search/docs/advanced/crawling/overview-google-crawlers). This can cause problems for apps that expect client-generated UUIDs to always be unique. Developers should be prepared for this and have a strategy for dealing with possible collisions, such as:
+
+- Check for duplicate UUIDs, fail gracefully
+- Disable write operations for Googlebot clients
+
+### "getRandomValues() not supported"
+
+This error occurs in environments where the standard [`crypto.getRandomValues()`](https://developer.mozilla.org/en-US/docs/Web/API/Crypto/getRandomValues) API is not supported. This issue can be resolved by adding an appropriate polyfill:
+
+### React Native / Expo
+
+1. Install [`react-native-get-random-values`](https://github.com/LinusU/react-native-get-random-values#readme)
+1. Import it _before_ `uuid`. Since `uuid` might also appear as a transitive dependency of some other imports it's safest to just import `react-native-get-random-values` as the very first thing in your entry point:
+
+```javascript
+import 'react-native-get-random-values';
+import { v4 as uuidv4 } from 'uuid';
+```
+
+<!-- prettier-ignore -->
+> [!NOTE]
+> If you are using Expo, you must be using at least `react-native-get-random-values@1.5.0` and `expo@39.0.0`.
+
+### Web Workers / Service Workers (Edge <= 18)
+
+[In Edge <= 18, Web Crypto is not supported in Web Workers or Service Workers](https://caniuse.com/#feat=cryptography) and we are not aware of a polyfill (let us know if you find one, please).
+
+### IE 11 (Internet Explorer)
+
+Support for IE11 and other legacy browsers has been dropped as of `uuid@9`. If you need to support legacy browsers, you can always transpile the uuid module source yourself (e.g. using [Babel](https://babeljs.io/)).
+
+## Upgrading From `uuid@7`
+
+### Only Named Exports Supported When Using with Node.js ESM
+
+`uuid@7` did not come with native ECMAScript Module (ESM) support for Node.js. Importing it in Node.js ESM consequently imported the CommonJS source with a default export. This library now comes with true Node.js ESM support and only provides named exports.
+
+Instead of doing:
+
+```javascript
+import uuid from 'uuid';
+uuid.v4();
+```
+
+you will now have to use the named exports:
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+uuidv4();
+```
+
+### Deep Requires No Longer Supported
+
+Deep requires like `require('uuid/v4')` [which have been deprecated in `uuid@7`](#deep-requires-now-deprecated) are no longer supported.
+
+## Upgrading From `uuid@3`
+
+"_Wait... what happened to `uuid@4` thru `uuid@6`?!?_"
+
+In order to avoid confusion with RFC [version 4](#uuidv4options-buffer-offset) and [version 5](#uuidv5name-namespace-buffer-offset) UUIDs, and a possible [version 6](http://gh.peabody.io/uuidv6/), releases 4 thru 6 of this module have been skipped.
+
+### Deep Requires Now Deprecated
+
+`uuid@3` encouraged the use of deep requires to minimize the bundle size of browser builds:
+
+```javascript
+const uuidv4 = require('uuid/v4'); // <== NOW DEPRECATED!
+uuidv4();
+```
+
+As of `uuid@7` this library now provides ECMAScript modules builds, which allow packagers like Webpack and Rollup to do "tree-shaking" to remove dead code. Instead, use the `import` syntax:
+
+```javascript
+import { v4 as uuidv4 } from 'uuid';
+uuidv4();
+```
+
+... or for CommonJS:
+
+```javascript
+const { v4: uuidv4 } = require('uuid');
+uuidv4();
+```
+
+### Default Export Removed
+
+`uuid@3` was exporting the Version 4 UUID method as a default export:
+
+```javascript
+const uuid = require('uuid'); // <== REMOVED!
+```
+
+This usage pattern was already discouraged in `uuid@3` and has been removed in `uuid@7`.
+
+---
+
+Markdown generated from [README_js.md](README_js.md) by <a href="https://github.com/broofa/runmd"><image height="12px" src="https://camo.githubusercontent.com/5c7c603cd1e6a43370b0a5063d457e0dabb74cf317adc7baba183acb686ee8d0/687474703a2f2f692e696d6775722e636f6d2f634a4b6f3662552e706e67" /></a>
diff --git a/mqtt-backend/node_modules/uuid/dist/bin/uuid b/mqtt-backend/node_modules/uuid/dist/bin/uuid
new file mode 100644
index 0000000..f38d2ee
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/bin/uuid
@@ -0,0 +1,2 @@
+#!/usr/bin/env node
+require('../uuid-bin');
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/index.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/index.js
new file mode 100644
index 0000000..3e909f4
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/index.js
@@ -0,0 +1,104 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+Object.defineProperty(exports, "MAX", {
+  enumerable: true,
+  get: function get() {
+    return _max.default;
+  }
+});
+Object.defineProperty(exports, "NIL", {
+  enumerable: true,
+  get: function get() {
+    return _nil.default;
+  }
+});
+Object.defineProperty(exports, "parse", {
+  enumerable: true,
+  get: function get() {
+    return _parse.default;
+  }
+});
+Object.defineProperty(exports, "stringify", {
+  enumerable: true,
+  get: function get() {
+    return _stringify.default;
+  }
+});
+Object.defineProperty(exports, "v1", {
+  enumerable: true,
+  get: function get() {
+    return _v.default;
+  }
+});
+Object.defineProperty(exports, "v1ToV6", {
+  enumerable: true,
+  get: function get() {
+    return _v1ToV.default;
+  }
+});
+Object.defineProperty(exports, "v3", {
+  enumerable: true,
+  get: function get() {
+    return _v2.default;
+  }
+});
+Object.defineProperty(exports, "v4", {
+  enumerable: true,
+  get: function get() {
+    return _v3.default;
+  }
+});
+Object.defineProperty(exports, "v5", {
+  enumerable: true,
+  get: function get() {
+    return _v4.default;
+  }
+});
+Object.defineProperty(exports, "v6", {
+  enumerable: true,
+  get: function get() {
+    return _v5.default;
+  }
+});
+Object.defineProperty(exports, "v6ToV1", {
+  enumerable: true,
+  get: function get() {
+    return _v6ToV.default;
+  }
+});
+Object.defineProperty(exports, "v7", {
+  enumerable: true,
+  get: function get() {
+    return _v6.default;
+  }
+});
+Object.defineProperty(exports, "validate", {
+  enumerable: true,
+  get: function get() {
+    return _validate.default;
+  }
+});
+Object.defineProperty(exports, "version", {
+  enumerable: true,
+  get: function get() {
+    return _version.default;
+  }
+});
+var _max = _interopRequireDefault(require("./max.js"));
+var _nil = _interopRequireDefault(require("./nil.js"));
+var _parse = _interopRequireDefault(require("./parse.js"));
+var _stringify = _interopRequireDefault(require("./stringify.js"));
+var _v = _interopRequireDefault(require("./v1.js"));
+var _v1ToV = _interopRequireDefault(require("./v1ToV6.js"));
+var _v2 = _interopRequireDefault(require("./v3.js"));
+var _v3 = _interopRequireDefault(require("./v4.js"));
+var _v4 = _interopRequireDefault(require("./v5.js"));
+var _v5 = _interopRequireDefault(require("./v6.js"));
+var _v6ToV = _interopRequireDefault(require("./v6ToV1.js"));
+var _v6 = _interopRequireDefault(require("./v7.js"));
+var _validate = _interopRequireDefault(require("./validate.js"));
+var _version = _interopRequireDefault(require("./version.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/max.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/max.js
new file mode 100644
index 0000000..8de76f8
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/max.js
@@ -0,0 +1,7 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _default = exports.default = 'ffffffff-ffff-ffff-ffff-ffffffffffff';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/md5.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/md5.js
new file mode 100644
index 0000000..a3bf60d
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/md5.js
@@ -0,0 +1,200 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+/*
+ * Browser-compatible JavaScript MD5
+ *
+ * Modification of JavaScript MD5
+ * https://github.com/blueimp/JavaScript-MD5
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ *
+ * Based on
+ * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+ * Digest Algorithm, as defined in RFC 1321.
+ * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for more info.
+ */
+function md5(bytes) {
+  if (typeof bytes === 'string') {
+    var msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
+
+    bytes = new Uint8Array(msg.length);
+    for (var i = 0; i < msg.length; ++i) {
+      bytes[i] = msg.charCodeAt(i);
+    }
+  }
+  return md5ToHexEncodedArray(wordsToMd5(bytesToWords(bytes), bytes.length * 8));
+}
+
+/*
+ * Convert an array of little-endian words to an array of bytes
+ */
+function md5ToHexEncodedArray(input) {
+  var output = [];
+  var length32 = input.length * 32;
+  var hexTab = '0123456789abcdef';
+  for (var i = 0; i < length32; i += 8) {
+    var x = input[i >> 5] >>> i % 32 & 0xff;
+    var hex = parseInt(hexTab.charAt(x >>> 4 & 0x0f) + hexTab.charAt(x & 0x0f), 16);
+    output.push(hex);
+  }
+  return output;
+}
+
+/**
+ * Calculate output length with padding and bit length
+ */
+function getOutputLength(inputLength8) {
+  return (inputLength8 + 64 >>> 9 << 4) + 14 + 1;
+}
+
+/*
+ * Calculate the MD5 of an array of little-endian words, and a bit length.
+ */
+function wordsToMd5(x, len) {
+  /* append padding */
+  x[len >> 5] |= 0x80 << len % 32;
+  x[getOutputLength(len) - 1] = len;
+  var a = 1732584193;
+  var b = -271733879;
+  var c = -1732584194;
+  var d = 271733878;
+  for (var i = 0; i < x.length; i += 16) {
+    var olda = a;
+    var oldb = b;
+    var oldc = c;
+    var oldd = d;
+    a = md5ff(a, b, c, d, x[i], 7, -680876936);
+    d = md5ff(d, a, b, c, x[i + 1], 12, -389564586);
+    c = md5ff(c, d, a, b, x[i + 2], 17, 606105819);
+    b = md5ff(b, c, d, a, x[i + 3], 22, -1044525330);
+    a = md5ff(a, b, c, d, x[i + 4], 7, -176418897);
+    d = md5ff(d, a, b, c, x[i + 5], 12, 1200080426);
+    c = md5ff(c, d, a, b, x[i + 6], 17, -1473231341);
+    b = md5ff(b, c, d, a, x[i + 7], 22, -45705983);
+    a = md5ff(a, b, c, d, x[i + 8], 7, 1770035416);
+    d = md5ff(d, a, b, c, x[i + 9], 12, -1958414417);
+    c = md5ff(c, d, a, b, x[i + 10], 17, -42063);
+    b = md5ff(b, c, d, a, x[i + 11], 22, -1990404162);
+    a = md5ff(a, b, c, d, x[i + 12], 7, 1804603682);
+    d = md5ff(d, a, b, c, x[i + 13], 12, -40341101);
+    c = md5ff(c, d, a, b, x[i + 14], 17, -1502002290);
+    b = md5ff(b, c, d, a, x[i + 15], 22, 1236535329);
+    a = md5gg(a, b, c, d, x[i + 1], 5, -165796510);
+    d = md5gg(d, a, b, c, x[i + 6], 9, -1069501632);
+    c = md5gg(c, d, a, b, x[i + 11], 14, 643717713);
+    b = md5gg(b, c, d, a, x[i], 20, -373897302);
+    a = md5gg(a, b, c, d, x[i + 5], 5, -701558691);
+    d = md5gg(d, a, b, c, x[i + 10], 9, 38016083);
+    c = md5gg(c, d, a, b, x[i + 15], 14, -660478335);
+    b = md5gg(b, c, d, a, x[i + 4], 20, -405537848);
+    a = md5gg(a, b, c, d, x[i + 9], 5, 568446438);
+    d = md5gg(d, a, b, c, x[i + 14], 9, -1019803690);
+    c = md5gg(c, d, a, b, x[i + 3], 14, -187363961);
+    b = md5gg(b, c, d, a, x[i + 8], 20, 1163531501);
+    a = md5gg(a, b, c, d, x[i + 13], 5, -1444681467);
+    d = md5gg(d, a, b, c, x[i + 2], 9, -51403784);
+    c = md5gg(c, d, a, b, x[i + 7], 14, 1735328473);
+    b = md5gg(b, c, d, a, x[i + 12], 20, -1926607734);
+    a = md5hh(a, b, c, d, x[i + 5], 4, -378558);
+    d = md5hh(d, a, b, c, x[i + 8], 11, -2022574463);
+    c = md5hh(c, d, a, b, x[i + 11], 16, 1839030562);
+    b = md5hh(b, c, d, a, x[i + 14], 23, -35309556);
+    a = md5hh(a, b, c, d, x[i + 1], 4, -1530992060);
+    d = md5hh(d, a, b, c, x[i + 4], 11, 1272893353);
+    c = md5hh(c, d, a, b, x[i + 7], 16, -155497632);
+    b = md5hh(b, c, d, a, x[i + 10], 23, -1094730640);
+    a = md5hh(a, b, c, d, x[i + 13], 4, 681279174);
+    d = md5hh(d, a, b, c, x[i], 11, -358537222);
+    c = md5hh(c, d, a, b, x[i + 3], 16, -722521979);
+    b = md5hh(b, c, d, a, x[i + 6], 23, 76029189);
+    a = md5hh(a, b, c, d, x[i + 9], 4, -640364487);
+    d = md5hh(d, a, b, c, x[i + 12], 11, -421815835);
+    c = md5hh(c, d, a, b, x[i + 15], 16, 530742520);
+    b = md5hh(b, c, d, a, x[i + 2], 23, -995338651);
+    a = md5ii(a, b, c, d, x[i], 6, -198630844);
+    d = md5ii(d, a, b, c, x[i + 7], 10, 1126891415);
+    c = md5ii(c, d, a, b, x[i + 14], 15, -1416354905);
+    b = md5ii(b, c, d, a, x[i + 5], 21, -57434055);
+    a = md5ii(a, b, c, d, x[i + 12], 6, 1700485571);
+    d = md5ii(d, a, b, c, x[i + 3], 10, -1894986606);
+    c = md5ii(c, d, a, b, x[i + 10], 15, -1051523);
+    b = md5ii(b, c, d, a, x[i + 1], 21, -2054922799);
+    a = md5ii(a, b, c, d, x[i + 8], 6, 1873313359);
+    d = md5ii(d, a, b, c, x[i + 15], 10, -30611744);
+    c = md5ii(c, d, a, b, x[i + 6], 15, -1560198380);
+    b = md5ii(b, c, d, a, x[i + 13], 21, 1309151649);
+    a = md5ii(a, b, c, d, x[i + 4], 6, -145523070);
+    d = md5ii(d, a, b, c, x[i + 11], 10, -1120210379);
+    c = md5ii(c, d, a, b, x[i + 2], 15, 718787259);
+    b = md5ii(b, c, d, a, x[i + 9], 21, -343485551);
+    a = safeAdd(a, olda);
+    b = safeAdd(b, oldb);
+    c = safeAdd(c, oldc);
+    d = safeAdd(d, oldd);
+  }
+  return [a, b, c, d];
+}
+
+/*
+ * Convert an array bytes to an array of little-endian words
+ * Characters >255 have their high-byte silently ignored.
+ */
+function bytesToWords(input) {
+  if (input.length === 0) {
+    return [];
+  }
+  var length8 = input.length * 8;
+  var output = new Uint32Array(getOutputLength(length8));
+  for (var i = 0; i < length8; i += 8) {
+    output[i >> 5] |= (input[i / 8] & 0xff) << i % 32;
+  }
+  return output;
+}
+
+/*
+ * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+ * to work around bugs in some JS interpreters.
+ */
+function safeAdd(x, y) {
+  var lsw = (x & 0xffff) + (y & 0xffff);
+  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+  return msw << 16 | lsw & 0xffff;
+}
+
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+function bitRotateLeft(num, cnt) {
+  return num << cnt | num >>> 32 - cnt;
+}
+
+/*
+ * These functions implement the four basic operations the algorithm uses.
+ */
+function md5cmn(q, a, b, x, s, t) {
+  return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b);
+}
+function md5ff(a, b, c, d, x, s, t) {
+  return md5cmn(b & c | ~b & d, a, b, x, s, t);
+}
+function md5gg(a, b, c, d, x, s, t) {
+  return md5cmn(b & d | c & ~d, a, b, x, s, t);
+}
+function md5hh(a, b, c, d, x, s, t) {
+  return md5cmn(b ^ c ^ d, a, b, x, s, t);
+}
+function md5ii(a, b, c, d, x, s, t) {
+  return md5cmn(c ^ (b | ~d), a, b, x, s, t);
+}
+var _default = exports.default = md5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/native.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/native.js
new file mode 100644
index 0000000..b48d539
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/native.js
@@ -0,0 +1,10 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var randomUUID = typeof crypto !== 'undefined' && crypto.randomUUID && crypto.randomUUID.bind(crypto);
+var _default = exports.default = {
+  randomUUID
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/nil.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/nil.js
new file mode 100644
index 0000000..f7967e9
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/nil.js
@@ -0,0 +1,7 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _default = exports.default = '00000000-0000-0000-0000-000000000000';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/parse.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/parse.js
new file mode 100644
index 0000000..8ba8f50
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/parse.js
@@ -0,0 +1,44 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _validate = _interopRequireDefault(require("./validate.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function parse(uuid) {
+  if (!(0, _validate.default)(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+  var v;
+  var arr = new Uint8Array(16);
+
+  // Parse ########-....-....-....-............
+  arr[0] = (v = parseInt(uuid.slice(0, 8), 16)) >>> 24;
+  arr[1] = v >>> 16 & 0xff;
+  arr[2] = v >>> 8 & 0xff;
+  arr[3] = v & 0xff;
+
+  // Parse ........-####-....-....-............
+  arr[4] = (v = parseInt(uuid.slice(9, 13), 16)) >>> 8;
+  arr[5] = v & 0xff;
+
+  // Parse ........-....-####-....-............
+  arr[6] = (v = parseInt(uuid.slice(14, 18), 16)) >>> 8;
+  arr[7] = v & 0xff;
+
+  // Parse ........-....-....-####-............
+  arr[8] = (v = parseInt(uuid.slice(19, 23), 16)) >>> 8;
+  arr[9] = v & 0xff;
+
+  // Parse ........-....-....-....-############
+  // (Use "/" to avoid 32-bit truncation when bit-shifting high-order bytes)
+  arr[10] = (v = parseInt(uuid.slice(24, 36), 16)) / 0x10000000000 & 0xff;
+  arr[11] = v / 0x100000000 & 0xff;
+  arr[12] = v >>> 24 & 0xff;
+  arr[13] = v >>> 16 & 0xff;
+  arr[14] = v >>> 8 & 0xff;
+  arr[15] = v & 0xff;
+  return arr;
+}
+var _default = exports.default = parse;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/regex.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/regex.js
new file mode 100644
index 0000000..fc02a88
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/regex.js
@@ -0,0 +1,7 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _default = exports.default = /^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$/i;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/rng.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/rng.js
new file mode 100644
index 0000000..6cf7e98
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/rng.js
@@ -0,0 +1,23 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = rng;
+// Unique ID creation requires a high quality random # generator. In the browser we therefore
+// require the crypto API and do not support built-in fallback to lower quality random number
+// generators (like Math.random()).
+
+var getRandomValues;
+var rnds8 = new Uint8Array(16);
+function rng() {
+  // lazy load so that environments that need to polyfill have a chance to do so
+  if (!getRandomValues) {
+    // getRandomValues needs to be invoked in a context where "this" is a Crypto implementation.
+    getRandomValues = typeof crypto !== 'undefined' && crypto.getRandomValues && crypto.getRandomValues.bind(crypto);
+    if (!getRandomValues) {
+      throw new Error('crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported');
+    }
+  }
+  return getRandomValues(rnds8);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/sha1.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/sha1.js
new file mode 100644
index 0000000..ae1cf63
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/sha1.js
@@ -0,0 +1,82 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+// Adapted from Chris Veness' SHA1 code at
+// http://www.movable-type.co.uk/scripts/sha1.html
+function f(s, x, y, z) {
+  switch (s) {
+    case 0:
+      return x & y ^ ~x & z;
+    case 1:
+      return x ^ y ^ z;
+    case 2:
+      return x & y ^ x & z ^ y & z;
+    case 3:
+      return x ^ y ^ z;
+  }
+}
+function ROTL(x, n) {
+  return x << n | x >>> 32 - n;
+}
+function sha1(bytes) {
+  var K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];
+  var H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];
+  if (typeof bytes === 'string') {
+    var msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
+
+    bytes = [];
+    for (var i = 0; i < msg.length; ++i) {
+      bytes.push(msg.charCodeAt(i));
+    }
+  } else if (!Array.isArray(bytes)) {
+    // Convert Array-like to Array
+    bytes = Array.prototype.slice.call(bytes);
+  }
+  bytes.push(0x80);
+  var l = bytes.length / 4 + 2;
+  var N = Math.ceil(l / 16);
+  var M = new Array(N);
+  for (var _i = 0; _i < N; ++_i) {
+    var arr = new Uint32Array(16);
+    for (var j = 0; j < 16; ++j) {
+      arr[j] = bytes[_i * 64 + j * 4] << 24 | bytes[_i * 64 + j * 4 + 1] << 16 | bytes[_i * 64 + j * 4 + 2] << 8 | bytes[_i * 64 + j * 4 + 3];
+    }
+    M[_i] = arr;
+  }
+  M[N - 1][14] = (bytes.length - 1) * 8 / Math.pow(2, 32);
+  M[N - 1][14] = Math.floor(M[N - 1][14]);
+  M[N - 1][15] = (bytes.length - 1) * 8 & 0xffffffff;
+  for (var _i2 = 0; _i2 < N; ++_i2) {
+    var W = new Uint32Array(80);
+    for (var t = 0; t < 16; ++t) {
+      W[t] = M[_i2][t];
+    }
+    for (var _t = 16; _t < 80; ++_t) {
+      W[_t] = ROTL(W[_t - 3] ^ W[_t - 8] ^ W[_t - 14] ^ W[_t - 16], 1);
+    }
+    var a = H[0];
+    var b = H[1];
+    var c = H[2];
+    var d = H[3];
+    var e = H[4];
+    for (var _t2 = 0; _t2 < 80; ++_t2) {
+      var s = Math.floor(_t2 / 20);
+      var T = ROTL(a, 5) + f(s, b, c, d) + e + K[s] + W[_t2] >>> 0;
+      e = d;
+      d = c;
+      c = ROTL(b, 30) >>> 0;
+      b = a;
+      a = T;
+    }
+    H[0] = H[0] + a >>> 0;
+    H[1] = H[1] + b >>> 0;
+    H[2] = H[2] + c >>> 0;
+    H[3] = H[3] + d >>> 0;
+    H[4] = H[4] + e >>> 0;
+  }
+  return [H[0] >> 24 & 0xff, H[0] >> 16 & 0xff, H[0] >> 8 & 0xff, H[0] & 0xff, H[1] >> 24 & 0xff, H[1] >> 16 & 0xff, H[1] >> 8 & 0xff, H[1] & 0xff, H[2] >> 24 & 0xff, H[2] >> 16 & 0xff, H[2] >> 8 & 0xff, H[2] & 0xff, H[3] >> 24 & 0xff, H[3] >> 16 & 0xff, H[3] >> 8 & 0xff, H[3] & 0xff, H[4] >> 24 & 0xff, H[4] >> 16 & 0xff, H[4] >> 8 & 0xff, H[4] & 0xff];
+}
+var _default = exports.default = sha1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/stringify.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/stringify.js
new file mode 100644
index 0000000..92dec9e
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/stringify.js
@@ -0,0 +1,38 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+exports.unsafeStringify = unsafeStringify;
+var _validate = _interopRequireDefault(require("./validate.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/**
+ * Convert array of 16 byte values to UUID string format of the form:
+ * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
+ */
+var byteToHex = [];
+for (var i = 0; i < 256; ++i) {
+  byteToHex.push((i + 0x100).toString(16).slice(1));
+}
+function unsafeStringify(arr, offset = 0) {
+  // Note: Be careful editing this code!  It's been tuned for performance
+  // and works in ways you may not expect. See https://github.com/uuidjs/uuid/pull/434
+  //
+  // Note to future-self: No, you can't remove the `toLowerCase()` call.
+  // REF: https://github.com/uuidjs/uuid/pull/677#issuecomment-1757351351
+  return (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + '-' + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + '-' + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + '-' + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + '-' + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase();
+}
+function stringify(arr, offset = 0) {
+  var uuid = unsafeStringify(arr, offset);
+  // Consistency check for valid UUID.  If this throws, it's likely due to one
+  // of the following:
+  // - One or more input array values don't map to a hex octet (leading to
+  // "undefined" in the uuid)
+  // - Invalid input values for the RFC `version` or `variant` fields
+  if (!(0, _validate.default)(uuid)) {
+    throw TypeError('Stringified UUID is invalid');
+  }
+  return uuid;
+}
+var _default = exports.default = stringify;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v1.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v1.js
new file mode 100644
index 0000000..9789251
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v1.js
@@ -0,0 +1,131 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _rng = _interopRequireDefault(require("./rng.js"));
+var _stringify = require("./stringify.js");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+// **`v1()` - Generate time-based UUID**
+//
+// Inspired by https://github.com/LiosK/UUID.js
+// and http://docs.python.org/library/uuid.html
+
+var _nodeId;
+var _clockseq;
+
+// Previous uuid creation time
+var _lastMSecs = 0;
+var _lastNSecs = 0;
+
+// See https://github.com/uuidjs/uuid for API details
+function v1(options, buf, offset) {
+  var i = buf && offset || 0;
+  var b = buf || new Array(16);
+  options = options || {};
+  var node = options.node;
+  var clockseq = options.clockseq;
+
+  // v1 only: Use cached `node` and `clockseq` values
+  if (!options._v6) {
+    if (!node) {
+      node = _nodeId;
+    }
+    if (clockseq == null) {
+      clockseq = _clockseq;
+    }
+  }
+
+  // Handle cases where we need entropy.  We do this lazily to minimize issues
+  // related to insufficient system entropy.  See #189
+  if (node == null || clockseq == null) {
+    var seedBytes = options.random || (options.rng || _rng.default)();
+
+    // Randomize node
+    if (node == null) {
+      node = [seedBytes[0], seedBytes[1], seedBytes[2], seedBytes[3], seedBytes[4], seedBytes[5]];
+
+      // v1 only: cache node value for reuse
+      if (!_nodeId && !options._v6) {
+        // per RFC4122 4.5: Set MAC multicast bit (v1 only)
+        node[0] |= 0x01; // Set multicast bit
+
+        _nodeId = node;
+      }
+    }
+
+    // Randomize clockseq
+    if (clockseq == null) {
+      // Per 4.2.2, randomize (14 bit) clockseq
+      clockseq = (seedBytes[6] << 8 | seedBytes[7]) & 0x3fff;
+      if (_clockseq === undefined && !options._v6) {
+        _clockseq = clockseq;
+      }
+    }
+  }
+
+  // v1 & v6 timestamps are 100 nano-second units since the Gregorian epoch,
+  // (1582-10-15 00:00).  JSNumbers aren't precise enough for this, so time is
+  // handled internally as 'msecs' (integer milliseconds) and 'nsecs'
+  // (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01 00:00.
+  var msecs = options.msecs !== undefined ? options.msecs : Date.now();
+
+  // Per 4.2.1.2, use count of uuid's generated during the current clock
+  // cycle to simulate higher resolution clock
+  var nsecs = options.nsecs !== undefined ? options.nsecs : _lastNSecs + 1;
+
+  // Time since last uuid creation (in msecs)
+  var dt = msecs - _lastMSecs + (nsecs - _lastNSecs) / 10000;
+
+  // Per 4.2.1.2, Bump clockseq on clock regression
+  if (dt < 0 && options.clockseq === undefined) {
+    clockseq = clockseq + 1 & 0x3fff;
+  }
+
+  // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
+  // time interval
+  if ((dt < 0 || msecs > _lastMSecs) && options.nsecs === undefined) {
+    nsecs = 0;
+  }
+
+  // Per 4.2.1.2 Throw error if too many uuids are requested
+  if (nsecs >= 10000) {
+    throw new Error("uuid.v1(): Can't create more than 10M uuids/sec");
+  }
+  _lastMSecs = msecs;
+  _lastNSecs = nsecs;
+  _clockseq = clockseq;
+
+  // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
+  msecs += 12219292800000;
+
+  // `time_low`
+  var tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
+  b[i++] = tl >>> 24 & 0xff;
+  b[i++] = tl >>> 16 & 0xff;
+  b[i++] = tl >>> 8 & 0xff;
+  b[i++] = tl & 0xff;
+
+  // `time_mid`
+  var tmh = msecs / 0x100000000 * 10000 & 0xfffffff;
+  b[i++] = tmh >>> 8 & 0xff;
+  b[i++] = tmh & 0xff;
+
+  // `time_high_and_version`
+  b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
+  b[i++] = tmh >>> 16 & 0xff;
+
+  // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
+  b[i++] = clockseq >>> 8 | 0x80;
+
+  // `clock_seq_low`
+  b[i++] = clockseq & 0xff;
+
+  // `node`
+  for (var n = 0; n < 6; ++n) {
+    b[i + n] = node[n];
+  }
+  return buf || (0, _stringify.unsafeStringify)(b);
+}
+var _default = exports.default = v1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v1ToV6.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v1ToV6.js
new file mode 100644
index 0000000..0b43199
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v1ToV6.js
@@ -0,0 +1,26 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = v1ToV6;
+var _parse = _interopRequireDefault(require("./parse.js"));
+var _stringify = require("./stringify.js");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/**
+ * Convert a v1 UUID to a v6 UUID
+ *
+ * @param {string|Uint8Array} uuid - The v1 UUID to convert to v6
+ * @returns {string|Uint8Array} The v6 UUID as the same type as the `uuid` arg
+ * (string or Uint8Array)
+ */
+function v1ToV6(uuid) {
+  var v1Bytes = typeof uuid === 'string' ? (0, _parse.default)(uuid) : uuid;
+  var v6Bytes = _v1ToV6(v1Bytes);
+  return typeof uuid === 'string' ? (0, _stringify.unsafeStringify)(v6Bytes) : v6Bytes;
+}
+
+// Do the field transformation needed for v1 -> v6
+function _v1ToV6(v1Bytes, randomize = false) {
+  return Uint8Array.of((v1Bytes[6] & 0x0f) << 4 | v1Bytes[7] >> 4 & 0x0f, (v1Bytes[7] & 0x0f) << 4 | (v1Bytes[4] & 0xf0) >> 4, (v1Bytes[4] & 0x0f) << 4 | (v1Bytes[5] & 0xf0) >> 4, (v1Bytes[5] & 0x0f) << 4 | (v1Bytes[0] & 0xf0) >> 4, (v1Bytes[0] & 0x0f) << 4 | (v1Bytes[1] & 0xf0) >> 4, (v1Bytes[1] & 0x0f) << 4 | (v1Bytes[2] & 0xf0) >> 4, 0x60 | v1Bytes[2] & 0x0f, v1Bytes[3], v1Bytes[8], v1Bytes[9], v1Bytes[10], v1Bytes[11], v1Bytes[12], v1Bytes[13], v1Bytes[14], v1Bytes[15]);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v3.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v3.js
new file mode 100644
index 0000000..8761fc3
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v3.js
@@ -0,0 +1,11 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _v = _interopRequireDefault(require("./v35.js"));
+var _md = _interopRequireDefault(require("./md5.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+var v3 = (0, _v.default)('v3', 0x30, _md.default);
+var _default = exports.default = v3;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v35.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v35.js
new file mode 100644
index 0000000..c22c23c
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v35.js
@@ -0,0 +1,63 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.URL = exports.DNS = void 0;
+exports.default = v35;
+var _stringify = require("./stringify.js");
+var _parse = _interopRequireDefault(require("./parse.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function stringToBytes(str) {
+  str = unescape(encodeURIComponent(str)); // UTF8 escape
+
+  var bytes = [];
+  for (var i = 0; i < str.length; ++i) {
+    bytes.push(str.charCodeAt(i));
+  }
+  return bytes;
+}
+var DNS = exports.DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
+var URL = exports.URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';
+function v35(name, version, hashfunc) {
+  function generateUUID(value, namespace, buf, offset) {
+    var _namespace;
+    if (typeof value === 'string') {
+      value = stringToBytes(value);
+    }
+    if (typeof namespace === 'string') {
+      namespace = (0, _parse.default)(namespace);
+    }
+    if (((_namespace = namespace) === null || _namespace === void 0 ? void 0 : _namespace.length) !== 16) {
+      throw TypeError('Namespace must be array-like (16 iterable integer values, 0-255)');
+    }
+
+    // Compute hash of namespace and value, Per 4.3
+    // Future: Use spread syntax when supported on all platforms, e.g. `bytes =
+    // hashfunc([...namespace, ... value])`
+    var bytes = new Uint8Array(16 + value.length);
+    bytes.set(namespace);
+    bytes.set(value, namespace.length);
+    bytes = hashfunc(bytes);
+    bytes[6] = bytes[6] & 0x0f | version;
+    bytes[8] = bytes[8] & 0x3f | 0x80;
+    if (buf) {
+      offset = offset || 0;
+      for (var i = 0; i < 16; ++i) {
+        buf[offset + i] = bytes[i];
+      }
+      return buf;
+    }
+    return (0, _stringify.unsafeStringify)(bytes);
+  }
+
+  // Function#name is not settable on some platforms (#270)
+  try {
+    generateUUID.name = name;
+  } catch (err) {}
+
+  // For CommonJS default export support
+  generateUUID.DNS = DNS;
+  generateUUID.URL = URL;
+  return generateUUID;
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v4.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v4.js
new file mode 100644
index 0000000..2242a3a
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v4.js
@@ -0,0 +1,32 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _native = _interopRequireDefault(require("./native.js"));
+var _rng = _interopRequireDefault(require("./rng.js"));
+var _stringify = require("./stringify.js");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function v4(options, buf, offset) {
+  if (_native.default.randomUUID && !buf && !options) {
+    return _native.default.randomUUID();
+  }
+  options = options || {};
+  var rnds = options.random || (options.rng || _rng.default)();
+
+  // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
+  rnds[6] = rnds[6] & 0x0f | 0x40;
+  rnds[8] = rnds[8] & 0x3f | 0x80;
+
+  // Copy bytes to buffer, if provided
+  if (buf) {
+    offset = offset || 0;
+    for (var i = 0; i < 16; ++i) {
+      buf[offset + i] = rnds[i];
+    }
+    return buf;
+  }
+  return (0, _stringify.unsafeStringify)(rnds);
+}
+var _default = exports.default = v4;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v5.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v5.js
new file mode 100644
index 0000000..54ad2cb
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v5.js
@@ -0,0 +1,11 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _v = _interopRequireDefault(require("./v35.js"));
+var _sha = _interopRequireDefault(require("./sha1.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+var v5 = (0, _v.default)('v5', 0x50, _sha.default);
+var _default = exports.default = v5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v6.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v6.js
new file mode 100644
index 0000000..cc4ece9
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v6.js
@@ -0,0 +1,42 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = v6;
+var _stringify = require("./stringify.js");
+var _v = _interopRequireDefault(require("./v1.js"));
+var _v1ToV = _interopRequireDefault(require("./v1ToV6.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
+function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
+function _defineProperty(e, r, t) { return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, { value: t, enumerable: !0, configurable: !0, writable: !0 }) : e[r] = t, e; }
+function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == typeof i ? i : i + ""; }
+function _toPrimitive(t, r) { if ("object" != typeof t || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != typeof i) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
+/**
+ *
+ * @param {object} options
+ * @param {Uint8Array=} buf
+ * @param {number=} offset
+ * @returns
+ */
+function v6(options = {}, buf, offset = 0) {
+  // v6 is v1 with different field layout, so we start with a v1 UUID, albeit
+  // with slightly different behavior around how the clock_seq and node fields
+  // are randomized, which is why we call v1 with _v6: true.
+  var bytes = (0, _v.default)(_objectSpread(_objectSpread({}, options), {}, {
+    _v6: true
+  }), new Uint8Array(16));
+
+  // Reorder the fields to v6 layout.
+  bytes = (0, _v1ToV.default)(bytes);
+
+  // Return as a byte array if requested
+  if (buf) {
+    for (var i = 0; i < 16; i++) {
+      buf[offset + i] = bytes[i];
+    }
+    return buf;
+  }
+  return (0, _stringify.unsafeStringify)(bytes);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v6ToV1.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v6ToV1.js
new file mode 100644
index 0000000..3c8350a
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v6ToV1.js
@@ -0,0 +1,26 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = v6ToV1;
+var _parse = _interopRequireDefault(require("./parse.js"));
+var _stringify = require("./stringify.js");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/**
+ * Convert a v6 UUID to a v1 UUID
+ *
+ * @param {string|Uint8Array} uuid - The v6 UUID to convert to v6
+ * @returns {string|Uint8Array} The v1 UUID as the same type as the `uuid` arg
+ * (string or Uint8Array)
+ */
+function v6ToV1(uuid) {
+  var v6Bytes = typeof uuid === 'string' ? (0, _parse.default)(uuid) : uuid;
+  var v1Bytes = _v6ToV1(v6Bytes);
+  return typeof uuid === 'string' ? (0, _stringify.unsafeStringify)(v1Bytes) : v1Bytes;
+}
+
+// Do the field transformation needed for v6 -> v1
+function _v6ToV1(v6Bytes) {
+  return Uint8Array.of((v6Bytes[3] & 0x0f) << 4 | v6Bytes[4] >> 4 & 0x0f, (v6Bytes[4] & 0x0f) << 4 | (v6Bytes[5] & 0xf0) >> 4, (v6Bytes[5] & 0x0f) << 4 | v6Bytes[6] & 0x0f, v6Bytes[7], (v6Bytes[1] & 0x0f) << 4 | (v6Bytes[2] & 0xf0) >> 4, (v6Bytes[2] & 0x0f) << 4 | (v6Bytes[3] & 0xf0) >> 4, 0x10 | (v6Bytes[0] & 0xf0) >> 4, (v6Bytes[0] & 0x0f) << 4 | (v6Bytes[1] & 0xf0) >> 4, v6Bytes[8], v6Bytes[9], v6Bytes[10], v6Bytes[11], v6Bytes[12], v6Bytes[13], v6Bytes[14], v6Bytes[15]);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v7.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v7.js
new file mode 100644
index 0000000..2e42801
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/v7.js
@@ -0,0 +1,152 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _rng = _interopRequireDefault(require("./rng.js"));
+var _stringify = require("./stringify.js");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/**
+ * UUID V7 - Unix Epoch time-based UUID
+ *
+ * The IETF has published RFC9562, introducing 3 new UUID versions (6,7,8). This
+ * implementation of V7 is based on the accepted, though not yet approved,
+ * revisions.
+ *
+ * RFC 9562:https://www.rfc-editor.org/rfc/rfc9562.html Universally Unique
+ * IDentifiers (UUIDs)
+
+ *
+ * Sample V7 value:
+ * https://www.rfc-editor.org/rfc/rfc9562.html#name-example-of-a-uuidv7-value
+ *
+ * Monotonic Bit Layout: RFC rfc9562.6.2 Method 1, Dedicated Counter Bits ref:
+ *     https://www.rfc-editor.org/rfc/rfc9562.html#section-6.2-5.1
+ *
+ *   0                   1                   2                   3 0 1 2 3 4 5 6
+ *   7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |                          unix_ts_ms                           |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |          unix_ts_ms           |  ver  |        seq_hi         |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |var|               seq_low               |        rand         |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |                             rand                              |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * seq is a 31 bit serialized counter; comprised of 12 bit seq_hi and 19 bit
+ * seq_low, and randomly initialized upon timestamp change. 31 bit counter size
+ * was selected as any bitwise operations in node are done as _signed_ 32 bit
+ * ints. we exclude the sign bit.
+ */
+
+var _seqLow = null;
+var _seqHigh = null;
+var _msecs = 0;
+function v7(options, buf, offset) {
+  options = options || {};
+
+  // initialize buffer and pointer
+  var i = buf && offset || 0;
+  var b = buf || new Uint8Array(16);
+
+  // rnds is Uint8Array(16) filled with random bytes
+  var rnds = options.random || (options.rng || _rng.default)();
+
+  // milliseconds since unix epoch, 1970-01-01 00:00
+  var msecs = options.msecs !== undefined ? options.msecs : Date.now();
+
+  // seq is user provided 31 bit counter
+  var seq = options.seq !== undefined ? options.seq : null;
+
+  // initialize local seq high/low parts
+  var seqHigh = _seqHigh;
+  var seqLow = _seqLow;
+
+  // check if clock has advanced and user has not provided msecs
+  if (msecs > _msecs && options.msecs === undefined) {
+    _msecs = msecs;
+
+    // unless user provided seq, reset seq parts
+    if (seq !== null) {
+      seqHigh = null;
+      seqLow = null;
+    }
+  }
+
+  // if we have a user provided seq
+  if (seq !== null) {
+    // trim provided seq to 31 bits of value, avoiding overflow
+    if (seq > 0x7fffffff) {
+      seq = 0x7fffffff;
+    }
+
+    // split provided seq into high/low parts
+    seqHigh = seq >>> 19 & 0xfff;
+    seqLow = seq & 0x7ffff;
+  }
+
+  // randomly initialize seq
+  if (seqHigh === null || seqLow === null) {
+    seqHigh = rnds[6] & 0x7f;
+    seqHigh = seqHigh << 8 | rnds[7];
+    seqLow = rnds[8] & 0x3f; // pad for var
+    seqLow = seqLow << 8 | rnds[9];
+    seqLow = seqLow << 5 | rnds[10] >>> 3;
+  }
+
+  // increment seq if within msecs window
+  if (msecs + 10000 > _msecs && seq === null) {
+    if (++seqLow > 0x7ffff) {
+      seqLow = 0;
+      if (++seqHigh > 0xfff) {
+        seqHigh = 0;
+
+        // increment internal _msecs. this allows us to continue incrementing
+        // while staying monotonic. Note, once we hit 10k milliseconds beyond system
+        // clock, we will reset breaking monotonicity (after (2^31)*10000 generations)
+        _msecs++;
+      }
+    }
+  } else {
+    // resetting; we have advanced more than
+    // 10k milliseconds beyond system clock
+    _msecs = msecs;
+  }
+  _seqHigh = seqHigh;
+  _seqLow = seqLow;
+
+  // [bytes 0-5] 48 bits of local timestamp
+  b[i++] = _msecs / 0x10000000000 & 0xff;
+  b[i++] = _msecs / 0x100000000 & 0xff;
+  b[i++] = _msecs / 0x1000000 & 0xff;
+  b[i++] = _msecs / 0x10000 & 0xff;
+  b[i++] = _msecs / 0x100 & 0xff;
+  b[i++] = _msecs & 0xff;
+
+  // [byte 6] - set 4 bits of version (7) with first 4 bits seq_hi
+  b[i++] = seqHigh >>> 4 & 0x0f | 0x70;
+
+  // [byte 7] remaining 8 bits of seq_hi
+  b[i++] = seqHigh & 0xff;
+
+  // [byte 8] - variant (2 bits), first 6 bits seq_low
+  b[i++] = seqLow >>> 13 & 0x3f | 0x80;
+
+  // [byte 9] 8 bits seq_low
+  b[i++] = seqLow >>> 5 & 0xff;
+
+  // [byte 10] remaining 5 bits seq_low, 3 bits random
+  b[i++] = seqLow << 3 & 0xff | rnds[10] & 0x07;
+
+  // [bytes 11-15] always random
+  b[i++] = rnds[11];
+  b[i++] = rnds[12];
+  b[i++] = rnds[13];
+  b[i++] = rnds[14];
+  b[i++] = rnds[15];
+  return buf || (0, _stringify.unsafeStringify)(b);
+}
+var _default = exports.default = v7;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/validate.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/validate.js
new file mode 100644
index 0000000..d47181a
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/validate.js
@@ -0,0 +1,12 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _regex = _interopRequireDefault(require("./regex.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function validate(uuid) {
+  return typeof uuid === 'string' && _regex.default.test(uuid);
+}
+var _default = exports.default = validate;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/commonjs-browser/version.js b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/version.js
new file mode 100644
index 0000000..0c6bbdd
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/commonjs-browser/version.js
@@ -0,0 +1,15 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _validate = _interopRequireDefault(require("./validate.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function version(uuid) {
+  if (!(0, _validate.default)(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+  return parseInt(uuid.slice(14, 15), 16);
+}
+var _default = exports.default = version;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/index.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/index.js
new file mode 100644
index 0000000..45214b3
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/index.js
@@ -0,0 +1,14 @@
+export { default as MAX } from './max.js';
+export { default as NIL } from './nil.js';
+export { default as parse } from './parse.js';
+export { default as stringify } from './stringify.js';
+export { default as v1 } from './v1.js';
+export { default as v1ToV6 } from './v1ToV6.js';
+export { default as v3 } from './v3.js';
+export { default as v4 } from './v4.js';
+export { default as v5 } from './v5.js';
+export { default as v6 } from './v6.js';
+export { default as v6ToV1 } from './v6ToV1.js';
+export { default as v7 } from './v7.js';
+export { default as validate } from './validate.js';
+export { default as version } from './version.js';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/max.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/max.js
new file mode 100644
index 0000000..f46a281
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/max.js
@@ -0,0 +1 @@
+export default 'ffffffff-ffff-ffff-ffff-ffffffffffff';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/md5.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/md5.js
new file mode 100644
index 0000000..82d170e
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/md5.js
@@ -0,0 +1,194 @@
+/*
+ * Browser-compatible JavaScript MD5
+ *
+ * Modification of JavaScript MD5
+ * https://github.com/blueimp/JavaScript-MD5
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ *
+ * Based on
+ * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+ * Digest Algorithm, as defined in RFC 1321.
+ * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for more info.
+ */
+function md5(bytes) {
+  if (typeof bytes === 'string') {
+    var msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
+
+    bytes = new Uint8Array(msg.length);
+    for (var i = 0; i < msg.length; ++i) {
+      bytes[i] = msg.charCodeAt(i);
+    }
+  }
+  return md5ToHexEncodedArray(wordsToMd5(bytesToWords(bytes), bytes.length * 8));
+}
+
+/*
+ * Convert an array of little-endian words to an array of bytes
+ */
+function md5ToHexEncodedArray(input) {
+  var output = [];
+  var length32 = input.length * 32;
+  var hexTab = '0123456789abcdef';
+  for (var i = 0; i < length32; i += 8) {
+    var x = input[i >> 5] >>> i % 32 & 0xff;
+    var hex = parseInt(hexTab.charAt(x >>> 4 & 0x0f) + hexTab.charAt(x & 0x0f), 16);
+    output.push(hex);
+  }
+  return output;
+}
+
+/**
+ * Calculate output length with padding and bit length
+ */
+function getOutputLength(inputLength8) {
+  return (inputLength8 + 64 >>> 9 << 4) + 14 + 1;
+}
+
+/*
+ * Calculate the MD5 of an array of little-endian words, and a bit length.
+ */
+function wordsToMd5(x, len) {
+  /* append padding */
+  x[len >> 5] |= 0x80 << len % 32;
+  x[getOutputLength(len) - 1] = len;
+  var a = 1732584193;
+  var b = -271733879;
+  var c = -1732584194;
+  var d = 271733878;
+  for (var i = 0; i < x.length; i += 16) {
+    var olda = a;
+    var oldb = b;
+    var oldc = c;
+    var oldd = d;
+    a = md5ff(a, b, c, d, x[i], 7, -680876936);
+    d = md5ff(d, a, b, c, x[i + 1], 12, -389564586);
+    c = md5ff(c, d, a, b, x[i + 2], 17, 606105819);
+    b = md5ff(b, c, d, a, x[i + 3], 22, -1044525330);
+    a = md5ff(a, b, c, d, x[i + 4], 7, -176418897);
+    d = md5ff(d, a, b, c, x[i + 5], 12, 1200080426);
+    c = md5ff(c, d, a, b, x[i + 6], 17, -1473231341);
+    b = md5ff(b, c, d, a, x[i + 7], 22, -45705983);
+    a = md5ff(a, b, c, d, x[i + 8], 7, 1770035416);
+    d = md5ff(d, a, b, c, x[i + 9], 12, -1958414417);
+    c = md5ff(c, d, a, b, x[i + 10], 17, -42063);
+    b = md5ff(b, c, d, a, x[i + 11], 22, -1990404162);
+    a = md5ff(a, b, c, d, x[i + 12], 7, 1804603682);
+    d = md5ff(d, a, b, c, x[i + 13], 12, -40341101);
+    c = md5ff(c, d, a, b, x[i + 14], 17, -1502002290);
+    b = md5ff(b, c, d, a, x[i + 15], 22, 1236535329);
+    a = md5gg(a, b, c, d, x[i + 1], 5, -165796510);
+    d = md5gg(d, a, b, c, x[i + 6], 9, -1069501632);
+    c = md5gg(c, d, a, b, x[i + 11], 14, 643717713);
+    b = md5gg(b, c, d, a, x[i], 20, -373897302);
+    a = md5gg(a, b, c, d, x[i + 5], 5, -701558691);
+    d = md5gg(d, a, b, c, x[i + 10], 9, 38016083);
+    c = md5gg(c, d, a, b, x[i + 15], 14, -660478335);
+    b = md5gg(b, c, d, a, x[i + 4], 20, -405537848);
+    a = md5gg(a, b, c, d, x[i + 9], 5, 568446438);
+    d = md5gg(d, a, b, c, x[i + 14], 9, -1019803690);
+    c = md5gg(c, d, a, b, x[i + 3], 14, -187363961);
+    b = md5gg(b, c, d, a, x[i + 8], 20, 1163531501);
+    a = md5gg(a, b, c, d, x[i + 13], 5, -1444681467);
+    d = md5gg(d, a, b, c, x[i + 2], 9, -51403784);
+    c = md5gg(c, d, a, b, x[i + 7], 14, 1735328473);
+    b = md5gg(b, c, d, a, x[i + 12], 20, -1926607734);
+    a = md5hh(a, b, c, d, x[i + 5], 4, -378558);
+    d = md5hh(d, a, b, c, x[i + 8], 11, -2022574463);
+    c = md5hh(c, d, a, b, x[i + 11], 16, 1839030562);
+    b = md5hh(b, c, d, a, x[i + 14], 23, -35309556);
+    a = md5hh(a, b, c, d, x[i + 1], 4, -1530992060);
+    d = md5hh(d, a, b, c, x[i + 4], 11, 1272893353);
+    c = md5hh(c, d, a, b, x[i + 7], 16, -155497632);
+    b = md5hh(b, c, d, a, x[i + 10], 23, -1094730640);
+    a = md5hh(a, b, c, d, x[i + 13], 4, 681279174);
+    d = md5hh(d, a, b, c, x[i], 11, -358537222);
+    c = md5hh(c, d, a, b, x[i + 3], 16, -722521979);
+    b = md5hh(b, c, d, a, x[i + 6], 23, 76029189);
+    a = md5hh(a, b, c, d, x[i + 9], 4, -640364487);
+    d = md5hh(d, a, b, c, x[i + 12], 11, -421815835);
+    c = md5hh(c, d, a, b, x[i + 15], 16, 530742520);
+    b = md5hh(b, c, d, a, x[i + 2], 23, -995338651);
+    a = md5ii(a, b, c, d, x[i], 6, -198630844);
+    d = md5ii(d, a, b, c, x[i + 7], 10, 1126891415);
+    c = md5ii(c, d, a, b, x[i + 14], 15, -1416354905);
+    b = md5ii(b, c, d, a, x[i + 5], 21, -57434055);
+    a = md5ii(a, b, c, d, x[i + 12], 6, 1700485571);
+    d = md5ii(d, a, b, c, x[i + 3], 10, -1894986606);
+    c = md5ii(c, d, a, b, x[i + 10], 15, -1051523);
+    b = md5ii(b, c, d, a, x[i + 1], 21, -2054922799);
+    a = md5ii(a, b, c, d, x[i + 8], 6, 1873313359);
+    d = md5ii(d, a, b, c, x[i + 15], 10, -30611744);
+    c = md5ii(c, d, a, b, x[i + 6], 15, -1560198380);
+    b = md5ii(b, c, d, a, x[i + 13], 21, 1309151649);
+    a = md5ii(a, b, c, d, x[i + 4], 6, -145523070);
+    d = md5ii(d, a, b, c, x[i + 11], 10, -1120210379);
+    c = md5ii(c, d, a, b, x[i + 2], 15, 718787259);
+    b = md5ii(b, c, d, a, x[i + 9], 21, -343485551);
+    a = safeAdd(a, olda);
+    b = safeAdd(b, oldb);
+    c = safeAdd(c, oldc);
+    d = safeAdd(d, oldd);
+  }
+  return [a, b, c, d];
+}
+
+/*
+ * Convert an array bytes to an array of little-endian words
+ * Characters >255 have their high-byte silently ignored.
+ */
+function bytesToWords(input) {
+  if (input.length === 0) {
+    return [];
+  }
+  var length8 = input.length * 8;
+  var output = new Uint32Array(getOutputLength(length8));
+  for (var i = 0; i < length8; i += 8) {
+    output[i >> 5] |= (input[i / 8] & 0xff) << i % 32;
+  }
+  return output;
+}
+
+/*
+ * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+ * to work around bugs in some JS interpreters.
+ */
+function safeAdd(x, y) {
+  var lsw = (x & 0xffff) + (y & 0xffff);
+  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+  return msw << 16 | lsw & 0xffff;
+}
+
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+function bitRotateLeft(num, cnt) {
+  return num << cnt | num >>> 32 - cnt;
+}
+
+/*
+ * These functions implement the four basic operations the algorithm uses.
+ */
+function md5cmn(q, a, b, x, s, t) {
+  return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b);
+}
+function md5ff(a, b, c, d, x, s, t) {
+  return md5cmn(b & c | ~b & d, a, b, x, s, t);
+}
+function md5gg(a, b, c, d, x, s, t) {
+  return md5cmn(b & d | c & ~d, a, b, x, s, t);
+}
+function md5hh(a, b, c, d, x, s, t) {
+  return md5cmn(b ^ c ^ d, a, b, x, s, t);
+}
+function md5ii(a, b, c, d, x, s, t) {
+  return md5cmn(c ^ (b | ~d), a, b, x, s, t);
+}
+export default md5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/native.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/native.js
new file mode 100644
index 0000000..ba09dec
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/native.js
@@ -0,0 +1,4 @@
+var randomUUID = typeof crypto !== 'undefined' && crypto.randomUUID && crypto.randomUUID.bind(crypto);
+export default {
+  randomUUID
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/nil.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/nil.js
new file mode 100644
index 0000000..b36324c
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/nil.js
@@ -0,0 +1 @@
+export default '00000000-0000-0000-0000-000000000000';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/parse.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/parse.js
new file mode 100644
index 0000000..8758831
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/parse.js
@@ -0,0 +1,37 @@
+import validate from './validate.js';
+function parse(uuid) {
+  if (!validate(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+  var v;
+  var arr = new Uint8Array(16);
+
+  // Parse ########-....-....-....-............
+  arr[0] = (v = parseInt(uuid.slice(0, 8), 16)) >>> 24;
+  arr[1] = v >>> 16 & 0xff;
+  arr[2] = v >>> 8 & 0xff;
+  arr[3] = v & 0xff;
+
+  // Parse ........-####-....-....-............
+  arr[4] = (v = parseInt(uuid.slice(9, 13), 16)) >>> 8;
+  arr[5] = v & 0xff;
+
+  // Parse ........-....-####-....-............
+  arr[6] = (v = parseInt(uuid.slice(14, 18), 16)) >>> 8;
+  arr[7] = v & 0xff;
+
+  // Parse ........-....-....-####-............
+  arr[8] = (v = parseInt(uuid.slice(19, 23), 16)) >>> 8;
+  arr[9] = v & 0xff;
+
+  // Parse ........-....-....-....-############
+  // (Use "/" to avoid 32-bit truncation when bit-shifting high-order bytes)
+  arr[10] = (v = parseInt(uuid.slice(24, 36), 16)) / 0x10000000000 & 0xff;
+  arr[11] = v / 0x100000000 & 0xff;
+  arr[12] = v >>> 24 & 0xff;
+  arr[13] = v >>> 16 & 0xff;
+  arr[14] = v >>> 8 & 0xff;
+  arr[15] = v & 0xff;
+  return arr;
+}
+export default parse;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/regex.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/regex.js
new file mode 100644
index 0000000..848a1fe
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/regex.js
@@ -0,0 +1 @@
+export default /^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$/i;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/rng.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/rng.js
new file mode 100644
index 0000000..e54d388
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/rng.js
@@ -0,0 +1,17 @@
+// Unique ID creation requires a high quality random # generator. In the browser we therefore
+// require the crypto API and do not support built-in fallback to lower quality random number
+// generators (like Math.random()).
+
+var getRandomValues;
+var rnds8 = new Uint8Array(16);
+export default function rng() {
+  // lazy load so that environments that need to polyfill have a chance to do so
+  if (!getRandomValues) {
+    // getRandomValues needs to be invoked in a context where "this" is a Crypto implementation.
+    getRandomValues = typeof crypto !== 'undefined' && crypto.getRandomValues && crypto.getRandomValues.bind(crypto);
+    if (!getRandomValues) {
+      throw new Error('crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported');
+    }
+  }
+  return getRandomValues(rnds8);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/sha1.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/sha1.js
new file mode 100644
index 0000000..bd88311
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/sha1.js
@@ -0,0 +1,76 @@
+// Adapted from Chris Veness' SHA1 code at
+// http://www.movable-type.co.uk/scripts/sha1.html
+function f(s, x, y, z) {
+  switch (s) {
+    case 0:
+      return x & y ^ ~x & z;
+    case 1:
+      return x ^ y ^ z;
+    case 2:
+      return x & y ^ x & z ^ y & z;
+    case 3:
+      return x ^ y ^ z;
+  }
+}
+function ROTL(x, n) {
+  return x << n | x >>> 32 - n;
+}
+function sha1(bytes) {
+  var K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];
+  var H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];
+  if (typeof bytes === 'string') {
+    var msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
+
+    bytes = [];
+    for (var i = 0; i < msg.length; ++i) {
+      bytes.push(msg.charCodeAt(i));
+    }
+  } else if (!Array.isArray(bytes)) {
+    // Convert Array-like to Array
+    bytes = Array.prototype.slice.call(bytes);
+  }
+  bytes.push(0x80);
+  var l = bytes.length / 4 + 2;
+  var N = Math.ceil(l / 16);
+  var M = new Array(N);
+  for (var _i = 0; _i < N; ++_i) {
+    var arr = new Uint32Array(16);
+    for (var j = 0; j < 16; ++j) {
+      arr[j] = bytes[_i * 64 + j * 4] << 24 | bytes[_i * 64 + j * 4 + 1] << 16 | bytes[_i * 64 + j * 4 + 2] << 8 | bytes[_i * 64 + j * 4 + 3];
+    }
+    M[_i] = arr;
+  }
+  M[N - 1][14] = (bytes.length - 1) * 8 / Math.pow(2, 32);
+  M[N - 1][14] = Math.floor(M[N - 1][14]);
+  M[N - 1][15] = (bytes.length - 1) * 8 & 0xffffffff;
+  for (var _i2 = 0; _i2 < N; ++_i2) {
+    var W = new Uint32Array(80);
+    for (var t = 0; t < 16; ++t) {
+      W[t] = M[_i2][t];
+    }
+    for (var _t = 16; _t < 80; ++_t) {
+      W[_t] = ROTL(W[_t - 3] ^ W[_t - 8] ^ W[_t - 14] ^ W[_t - 16], 1);
+    }
+    var a = H[0];
+    var b = H[1];
+    var c = H[2];
+    var d = H[3];
+    var e = H[4];
+    for (var _t2 = 0; _t2 < 80; ++_t2) {
+      var s = Math.floor(_t2 / 20);
+      var T = ROTL(a, 5) + f(s, b, c, d) + e + K[s] + W[_t2] >>> 0;
+      e = d;
+      d = c;
+      c = ROTL(b, 30) >>> 0;
+      b = a;
+      a = T;
+    }
+    H[0] = H[0] + a >>> 0;
+    H[1] = H[1] + b >>> 0;
+    H[2] = H[2] + c >>> 0;
+    H[3] = H[3] + d >>> 0;
+    H[4] = H[4] + e >>> 0;
+  }
+  return [H[0] >> 24 & 0xff, H[0] >> 16 & 0xff, H[0] >> 8 & 0xff, H[0] & 0xff, H[1] >> 24 & 0xff, H[1] >> 16 & 0xff, H[1] >> 8 & 0xff, H[1] & 0xff, H[2] >> 24 & 0xff, H[2] >> 16 & 0xff, H[2] >> 8 & 0xff, H[2] & 0xff, H[3] >> 24 & 0xff, H[3] >> 16 & 0xff, H[3] >> 8 & 0xff, H[3] & 0xff, H[4] >> 24 & 0xff, H[4] >> 16 & 0xff, H[4] >> 8 & 0xff, H[4] & 0xff];
+}
+export default sha1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/stringify.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/stringify.js
new file mode 100644
index 0000000..0a9cf40
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/stringify.js
@@ -0,0 +1,31 @@
+import validate from './validate.js';
+
+/**
+ * Convert array of 16 byte values to UUID string format of the form:
+ * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
+ */
+var byteToHex = [];
+for (var i = 0; i < 256; ++i) {
+  byteToHex.push((i + 0x100).toString(16).slice(1));
+}
+export function unsafeStringify(arr, offset = 0) {
+  // Note: Be careful editing this code!  It's been tuned for performance
+  // and works in ways you may not expect. See https://github.com/uuidjs/uuid/pull/434
+  //
+  // Note to future-self: No, you can't remove the `toLowerCase()` call.
+  // REF: https://github.com/uuidjs/uuid/pull/677#issuecomment-1757351351
+  return (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + '-' + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + '-' + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + '-' + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + '-' + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase();
+}
+function stringify(arr, offset = 0) {
+  var uuid = unsafeStringify(arr, offset);
+  // Consistency check for valid UUID.  If this throws, it's likely due to one
+  // of the following:
+  // - One or more input array values don't map to a hex octet (leading to
+  // "undefined" in the uuid)
+  // - Invalid input values for the RFC `version` or `variant` fields
+  if (!validate(uuid)) {
+    throw TypeError('Stringified UUID is invalid');
+  }
+  return uuid;
+}
+export default stringify;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/v1.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/v1.js
new file mode 100644
index 0000000..d42a904
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/v1.js
@@ -0,0 +1,125 @@
+import rng from './rng.js';
+import { unsafeStringify } from './stringify.js';
+
+// **`v1()` - Generate time-based UUID**
+//
+// Inspired by https://github.com/LiosK/UUID.js
+// and http://docs.python.org/library/uuid.html
+
+var _nodeId;
+var _clockseq;
+
+// Previous uuid creation time
+var _lastMSecs = 0;
+var _lastNSecs = 0;
+
+// See https://github.com/uuidjs/uuid for API details
+function v1(options, buf, offset) {
+  var i = buf && offset || 0;
+  var b = buf || new Array(16);
+  options = options || {};
+  var node = options.node;
+  var clockseq = options.clockseq;
+
+  // v1 only: Use cached `node` and `clockseq` values
+  if (!options._v6) {
+    if (!node) {
+      node = _nodeId;
+    }
+    if (clockseq == null) {
+      clockseq = _clockseq;
+    }
+  }
+
+  // Handle cases where we need entropy.  We do this lazily to minimize issues
+  // related to insufficient system entropy.  See #189
+  if (node == null || clockseq == null) {
+    var seedBytes = options.random || (options.rng || rng)();
+
+    // Randomize node
+    if (node == null) {
+      node = [seedBytes[0], seedBytes[1], seedBytes[2], seedBytes[3], seedBytes[4], seedBytes[5]];
+
+      // v1 only: cache node value for reuse
+      if (!_nodeId && !options._v6) {
+        // per RFC4122 4.5: Set MAC multicast bit (v1 only)
+        node[0] |= 0x01; // Set multicast bit
+
+        _nodeId = node;
+      }
+    }
+
+    // Randomize clockseq
+    if (clockseq == null) {
+      // Per 4.2.2, randomize (14 bit) clockseq
+      clockseq = (seedBytes[6] << 8 | seedBytes[7]) & 0x3fff;
+      if (_clockseq === undefined && !options._v6) {
+        _clockseq = clockseq;
+      }
+    }
+  }
+
+  // v1 & v6 timestamps are 100 nano-second units since the Gregorian epoch,
+  // (1582-10-15 00:00).  JSNumbers aren't precise enough for this, so time is
+  // handled internally as 'msecs' (integer milliseconds) and 'nsecs'
+  // (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01 00:00.
+  var msecs = options.msecs !== undefined ? options.msecs : Date.now();
+
+  // Per 4.2.1.2, use count of uuid's generated during the current clock
+  // cycle to simulate higher resolution clock
+  var nsecs = options.nsecs !== undefined ? options.nsecs : _lastNSecs + 1;
+
+  // Time since last uuid creation (in msecs)
+  var dt = msecs - _lastMSecs + (nsecs - _lastNSecs) / 10000;
+
+  // Per 4.2.1.2, Bump clockseq on clock regression
+  if (dt < 0 && options.clockseq === undefined) {
+    clockseq = clockseq + 1 & 0x3fff;
+  }
+
+  // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
+  // time interval
+  if ((dt < 0 || msecs > _lastMSecs) && options.nsecs === undefined) {
+    nsecs = 0;
+  }
+
+  // Per 4.2.1.2 Throw error if too many uuids are requested
+  if (nsecs >= 10000) {
+    throw new Error("uuid.v1(): Can't create more than 10M uuids/sec");
+  }
+  _lastMSecs = msecs;
+  _lastNSecs = nsecs;
+  _clockseq = clockseq;
+
+  // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
+  msecs += 12219292800000;
+
+  // `time_low`
+  var tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
+  b[i++] = tl >>> 24 & 0xff;
+  b[i++] = tl >>> 16 & 0xff;
+  b[i++] = tl >>> 8 & 0xff;
+  b[i++] = tl & 0xff;
+
+  // `time_mid`
+  var tmh = msecs / 0x100000000 * 10000 & 0xfffffff;
+  b[i++] = tmh >>> 8 & 0xff;
+  b[i++] = tmh & 0xff;
+
+  // `time_high_and_version`
+  b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
+  b[i++] = tmh >>> 16 & 0xff;
+
+  // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
+  b[i++] = clockseq >>> 8 | 0x80;
+
+  // `clock_seq_low`
+  b[i++] = clockseq & 0xff;
+
+  // `node`
+  for (var n = 0; n < 6; ++n) {
+    b[i + n] = node[n];
+  }
+  return buf || unsafeStringify(b);
+}
+export default v1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/v1ToV6.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/v1ToV6.js
new file mode 100644
index 0000000..e4ecc29
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/v1ToV6.js
@@ -0,0 +1,20 @@
+import parse from './parse.js';
+import { unsafeStringify } from './stringify.js';
+
+/**
+ * Convert a v1 UUID to a v6 UUID
+ *
+ * @param {string|Uint8Array} uuid - The v1 UUID to convert to v6
+ * @returns {string|Uint8Array} The v6 UUID as the same type as the `uuid` arg
+ * (string or Uint8Array)
+ */
+export default function v1ToV6(uuid) {
+  var v1Bytes = typeof uuid === 'string' ? parse(uuid) : uuid;
+  var v6Bytes = _v1ToV6(v1Bytes);
+  return typeof uuid === 'string' ? unsafeStringify(v6Bytes) : v6Bytes;
+}
+
+// Do the field transformation needed for v1 -> v6
+function _v1ToV6(v1Bytes, randomize = false) {
+  return Uint8Array.of((v1Bytes[6] & 0x0f) << 4 | v1Bytes[7] >> 4 & 0x0f, (v1Bytes[7] & 0x0f) << 4 | (v1Bytes[4] & 0xf0) >> 4, (v1Bytes[4] & 0x0f) << 4 | (v1Bytes[5] & 0xf0) >> 4, (v1Bytes[5] & 0x0f) << 4 | (v1Bytes[0] & 0xf0) >> 4, (v1Bytes[0] & 0x0f) << 4 | (v1Bytes[1] & 0xf0) >> 4, (v1Bytes[1] & 0x0f) << 4 | (v1Bytes[2] & 0xf0) >> 4, 0x60 | v1Bytes[2] & 0x0f, v1Bytes[3], v1Bytes[8], v1Bytes[9], v1Bytes[10], v1Bytes[11], v1Bytes[12], v1Bytes[13], v1Bytes[14], v1Bytes[15]);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/v3.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/v3.js
new file mode 100644
index 0000000..c9ab9a4
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/v3.js
@@ -0,0 +1,4 @@
+import v35 from './v35.js';
+import md5 from './md5.js';
+var v3 = v35('v3', 0x30, md5);
+export default v3;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/v35.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/v35.js
new file mode 100644
index 0000000..e5fd93f
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/v35.js
@@ -0,0 +1,55 @@
+import { unsafeStringify } from './stringify.js';
+import parse from './parse.js';
+function stringToBytes(str) {
+  str = unescape(encodeURIComponent(str)); // UTF8 escape
+
+  var bytes = [];
+  for (var i = 0; i < str.length; ++i) {
+    bytes.push(str.charCodeAt(i));
+  }
+  return bytes;
+}
+export var DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
+export var URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';
+export default function v35(name, version, hashfunc) {
+  function generateUUID(value, namespace, buf, offset) {
+    var _namespace;
+    if (typeof value === 'string') {
+      value = stringToBytes(value);
+    }
+    if (typeof namespace === 'string') {
+      namespace = parse(namespace);
+    }
+    if (((_namespace = namespace) === null || _namespace === void 0 ? void 0 : _namespace.length) !== 16) {
+      throw TypeError('Namespace must be array-like (16 iterable integer values, 0-255)');
+    }
+
+    // Compute hash of namespace and value, Per 4.3
+    // Future: Use spread syntax when supported on all platforms, e.g. `bytes =
+    // hashfunc([...namespace, ... value])`
+    var bytes = new Uint8Array(16 + value.length);
+    bytes.set(namespace);
+    bytes.set(value, namespace.length);
+    bytes = hashfunc(bytes);
+    bytes[6] = bytes[6] & 0x0f | version;
+    bytes[8] = bytes[8] & 0x3f | 0x80;
+    if (buf) {
+      offset = offset || 0;
+      for (var i = 0; i < 16; ++i) {
+        buf[offset + i] = bytes[i];
+      }
+      return buf;
+    }
+    return unsafeStringify(bytes);
+  }
+
+  // Function#name is not settable on some platforms (#270)
+  try {
+    generateUUID.name = name;
+  } catch (err) {}
+
+  // For CommonJS default export support
+  generateUUID.DNS = DNS;
+  generateUUID.URL = URL;
+  return generateUUID;
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/v4.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/v4.js
new file mode 100644
index 0000000..f107002
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/v4.js
@@ -0,0 +1,25 @@
+import native from './native.js';
+import rng from './rng.js';
+import { unsafeStringify } from './stringify.js';
+function v4(options, buf, offset) {
+  if (native.randomUUID && !buf && !options) {
+    return native.randomUUID();
+  }
+  options = options || {};
+  var rnds = options.random || (options.rng || rng)();
+
+  // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
+  rnds[6] = rnds[6] & 0x0f | 0x40;
+  rnds[8] = rnds[8] & 0x3f | 0x80;
+
+  // Copy bytes to buffer, if provided
+  if (buf) {
+    offset = offset || 0;
+    for (var i = 0; i < 16; ++i) {
+      buf[offset + i] = rnds[i];
+    }
+    return buf;
+  }
+  return unsafeStringify(rnds);
+}
+export default v4;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/v5.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/v5.js
new file mode 100644
index 0000000..c08d96b
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/v5.js
@@ -0,0 +1,4 @@
+import v35 from './v35.js';
+import sha1 from './sha1.js';
+var v5 = v35('v5', 0x50, sha1);
+export default v5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/v6.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/v6.js
new file mode 100644
index 0000000..13f9e91
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/v6.js
@@ -0,0 +1,36 @@
+function ownKeys(e, r) { var t = Object.keys(e); if (Object.getOwnPropertySymbols) { var o = Object.getOwnPropertySymbols(e); r && (o = o.filter(function (r) { return Object.getOwnPropertyDescriptor(e, r).enumerable; })), t.push.apply(t, o); } return t; }
+function _objectSpread(e) { for (var r = 1; r < arguments.length; r++) { var t = null != arguments[r] ? arguments[r] : {}; r % 2 ? ownKeys(Object(t), !0).forEach(function (r) { _defineProperty(e, r, t[r]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(e, Object.getOwnPropertyDescriptors(t)) : ownKeys(Object(t)).forEach(function (r) { Object.defineProperty(e, r, Object.getOwnPropertyDescriptor(t, r)); }); } return e; }
+function _defineProperty(e, r, t) { return (r = _toPropertyKey(r)) in e ? Object.defineProperty(e, r, { value: t, enumerable: !0, configurable: !0, writable: !0 }) : e[r] = t, e; }
+function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == typeof i ? i : i + ""; }
+function _toPrimitive(t, r) { if ("object" != typeof t || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != typeof i) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); }
+import { unsafeStringify } from './stringify.js';
+import v1 from './v1.js';
+import v1ToV6 from './v1ToV6.js';
+
+/**
+ *
+ * @param {object} options
+ * @param {Uint8Array=} buf
+ * @param {number=} offset
+ * @returns
+ */
+export default function v6(options = {}, buf, offset = 0) {
+  // v6 is v1 with different field layout, so we start with a v1 UUID, albeit
+  // with slightly different behavior around how the clock_seq and node fields
+  // are randomized, which is why we call v1 with _v6: true.
+  var bytes = v1(_objectSpread(_objectSpread({}, options), {}, {
+    _v6: true
+  }), new Uint8Array(16));
+
+  // Reorder the fields to v6 layout.
+  bytes = v1ToV6(bytes);
+
+  // Return as a byte array if requested
+  if (buf) {
+    for (var i = 0; i < 16; i++) {
+      buf[offset + i] = bytes[i];
+    }
+    return buf;
+  }
+  return unsafeStringify(bytes);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/v6ToV1.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/v6ToV1.js
new file mode 100644
index 0000000..3dd1058
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/v6ToV1.js
@@ -0,0 +1,20 @@
+import parse from './parse.js';
+import { unsafeStringify } from './stringify.js';
+
+/**
+ * Convert a v6 UUID to a v1 UUID
+ *
+ * @param {string|Uint8Array} uuid - The v6 UUID to convert to v6
+ * @returns {string|Uint8Array} The v1 UUID as the same type as the `uuid` arg
+ * (string or Uint8Array)
+ */
+export default function v6ToV1(uuid) {
+  var v6Bytes = typeof uuid === 'string' ? parse(uuid) : uuid;
+  var v1Bytes = _v6ToV1(v6Bytes);
+  return typeof uuid === 'string' ? unsafeStringify(v1Bytes) : v1Bytes;
+}
+
+// Do the field transformation needed for v6 -> v1
+function _v6ToV1(v6Bytes) {
+  return Uint8Array.of((v6Bytes[3] & 0x0f) << 4 | v6Bytes[4] >> 4 & 0x0f, (v6Bytes[4] & 0x0f) << 4 | (v6Bytes[5] & 0xf0) >> 4, (v6Bytes[5] & 0x0f) << 4 | v6Bytes[6] & 0x0f, v6Bytes[7], (v6Bytes[1] & 0x0f) << 4 | (v6Bytes[2] & 0xf0) >> 4, (v6Bytes[2] & 0x0f) << 4 | (v6Bytes[3] & 0xf0) >> 4, 0x10 | (v6Bytes[0] & 0xf0) >> 4, (v6Bytes[0] & 0x0f) << 4 | (v6Bytes[1] & 0xf0) >> 4, v6Bytes[8], v6Bytes[9], v6Bytes[10], v6Bytes[11], v6Bytes[12], v6Bytes[13], v6Bytes[14], v6Bytes[15]);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/v7.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/v7.js
new file mode 100644
index 0000000..324153b
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/v7.js
@@ -0,0 +1,146 @@
+import rng from './rng.js';
+import { unsafeStringify } from './stringify.js';
+
+/**
+ * UUID V7 - Unix Epoch time-based UUID
+ *
+ * The IETF has published RFC9562, introducing 3 new UUID versions (6,7,8). This
+ * implementation of V7 is based on the accepted, though not yet approved,
+ * revisions.
+ *
+ * RFC 9562:https://www.rfc-editor.org/rfc/rfc9562.html Universally Unique
+ * IDentifiers (UUIDs)
+
+ *
+ * Sample V7 value:
+ * https://www.rfc-editor.org/rfc/rfc9562.html#name-example-of-a-uuidv7-value
+ *
+ * Monotonic Bit Layout: RFC rfc9562.6.2 Method 1, Dedicated Counter Bits ref:
+ *     https://www.rfc-editor.org/rfc/rfc9562.html#section-6.2-5.1
+ *
+ *   0                   1                   2                   3 0 1 2 3 4 5 6
+ *   7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |                          unix_ts_ms                           |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |          unix_ts_ms           |  ver  |        seq_hi         |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |var|               seq_low               |        rand         |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |                             rand                              |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * seq is a 31 bit serialized counter; comprised of 12 bit seq_hi and 19 bit
+ * seq_low, and randomly initialized upon timestamp change. 31 bit counter size
+ * was selected as any bitwise operations in node are done as _signed_ 32 bit
+ * ints. we exclude the sign bit.
+ */
+
+var _seqLow = null;
+var _seqHigh = null;
+var _msecs = 0;
+function v7(options, buf, offset) {
+  options = options || {};
+
+  // initialize buffer and pointer
+  var i = buf && offset || 0;
+  var b = buf || new Uint8Array(16);
+
+  // rnds is Uint8Array(16) filled with random bytes
+  var rnds = options.random || (options.rng || rng)();
+
+  // milliseconds since unix epoch, 1970-01-01 00:00
+  var msecs = options.msecs !== undefined ? options.msecs : Date.now();
+
+  // seq is user provided 31 bit counter
+  var seq = options.seq !== undefined ? options.seq : null;
+
+  // initialize local seq high/low parts
+  var seqHigh = _seqHigh;
+  var seqLow = _seqLow;
+
+  // check if clock has advanced and user has not provided msecs
+  if (msecs > _msecs && options.msecs === undefined) {
+    _msecs = msecs;
+
+    // unless user provided seq, reset seq parts
+    if (seq !== null) {
+      seqHigh = null;
+      seqLow = null;
+    }
+  }
+
+  // if we have a user provided seq
+  if (seq !== null) {
+    // trim provided seq to 31 bits of value, avoiding overflow
+    if (seq > 0x7fffffff) {
+      seq = 0x7fffffff;
+    }
+
+    // split provided seq into high/low parts
+    seqHigh = seq >>> 19 & 0xfff;
+    seqLow = seq & 0x7ffff;
+  }
+
+  // randomly initialize seq
+  if (seqHigh === null || seqLow === null) {
+    seqHigh = rnds[6] & 0x7f;
+    seqHigh = seqHigh << 8 | rnds[7];
+    seqLow = rnds[8] & 0x3f; // pad for var
+    seqLow = seqLow << 8 | rnds[9];
+    seqLow = seqLow << 5 | rnds[10] >>> 3;
+  }
+
+  // increment seq if within msecs window
+  if (msecs + 10000 > _msecs && seq === null) {
+    if (++seqLow > 0x7ffff) {
+      seqLow = 0;
+      if (++seqHigh > 0xfff) {
+        seqHigh = 0;
+
+        // increment internal _msecs. this allows us to continue incrementing
+        // while staying monotonic. Note, once we hit 10k milliseconds beyond system
+        // clock, we will reset breaking monotonicity (after (2^31)*10000 generations)
+        _msecs++;
+      }
+    }
+  } else {
+    // resetting; we have advanced more than
+    // 10k milliseconds beyond system clock
+    _msecs = msecs;
+  }
+  _seqHigh = seqHigh;
+  _seqLow = seqLow;
+
+  // [bytes 0-5] 48 bits of local timestamp
+  b[i++] = _msecs / 0x10000000000 & 0xff;
+  b[i++] = _msecs / 0x100000000 & 0xff;
+  b[i++] = _msecs / 0x1000000 & 0xff;
+  b[i++] = _msecs / 0x10000 & 0xff;
+  b[i++] = _msecs / 0x100 & 0xff;
+  b[i++] = _msecs & 0xff;
+
+  // [byte 6] - set 4 bits of version (7) with first 4 bits seq_hi
+  b[i++] = seqHigh >>> 4 & 0x0f | 0x70;
+
+  // [byte 7] remaining 8 bits of seq_hi
+  b[i++] = seqHigh & 0xff;
+
+  // [byte 8] - variant (2 bits), first 6 bits seq_low
+  b[i++] = seqLow >>> 13 & 0x3f | 0x80;
+
+  // [byte 9] 8 bits seq_low
+  b[i++] = seqLow >>> 5 & 0xff;
+
+  // [byte 10] remaining 5 bits seq_low, 3 bits random
+  b[i++] = seqLow << 3 & 0xff | rnds[10] & 0x07;
+
+  // [bytes 11-15] always random
+  b[i++] = rnds[11];
+  b[i++] = rnds[12];
+  b[i++] = rnds[13];
+  b[i++] = rnds[14];
+  b[i++] = rnds[15];
+  return buf || unsafeStringify(b);
+}
+export default v7;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/validate.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/validate.js
new file mode 100644
index 0000000..6e40fa5
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/validate.js
@@ -0,0 +1,5 @@
+import REGEX from './regex.js';
+function validate(uuid) {
+  return typeof uuid === 'string' && REGEX.test(uuid);
+}
+export default validate;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-browser/version.js b/mqtt-backend/node_modules/uuid/dist/esm-browser/version.js
new file mode 100644
index 0000000..4ca924e
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-browser/version.js
@@ -0,0 +1,8 @@
+import validate from './validate.js';
+function version(uuid) {
+  if (!validate(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+  return parseInt(uuid.slice(14, 15), 16);
+}
+export default version;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/index.js b/mqtt-backend/node_modules/uuid/dist/esm-node/index.js
new file mode 100644
index 0000000..45214b3
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/index.js
@@ -0,0 +1,14 @@
+export { default as MAX } from './max.js';
+export { default as NIL } from './nil.js';
+export { default as parse } from './parse.js';
+export { default as stringify } from './stringify.js';
+export { default as v1 } from './v1.js';
+export { default as v1ToV6 } from './v1ToV6.js';
+export { default as v3 } from './v3.js';
+export { default as v4 } from './v4.js';
+export { default as v5 } from './v5.js';
+export { default as v6 } from './v6.js';
+export { default as v6ToV1 } from './v6ToV1.js';
+export { default as v7 } from './v7.js';
+export { default as validate } from './validate.js';
+export { default as version } from './version.js';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/max.js b/mqtt-backend/node_modules/uuid/dist/esm-node/max.js
new file mode 100644
index 0000000..f46a281
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/max.js
@@ -0,0 +1 @@
+export default 'ffffffff-ffff-ffff-ffff-ffffffffffff';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/md5.js b/mqtt-backend/node_modules/uuid/dist/esm-node/md5.js
new file mode 100644
index 0000000..b3d890e
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/md5.js
@@ -0,0 +1,10 @@
+import crypto from 'node:crypto';
+function md5(bytes) {
+  if (Array.isArray(bytes)) {
+    bytes = Buffer.from(bytes);
+  } else if (typeof bytes === 'string') {
+    bytes = Buffer.from(bytes, 'utf8');
+  }
+  return crypto.createHash('md5').update(bytes).digest();
+}
+export default md5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/native.js b/mqtt-backend/node_modules/uuid/dist/esm-node/native.js
new file mode 100644
index 0000000..d688de1
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/native.js
@@ -0,0 +1,4 @@
+import crypto from 'node:crypto';
+export default {
+  randomUUID: crypto.randomUUID
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/nil.js b/mqtt-backend/node_modules/uuid/dist/esm-node/nil.js
new file mode 100644
index 0000000..b36324c
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/nil.js
@@ -0,0 +1 @@
+export default '00000000-0000-0000-0000-000000000000';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/parse.js b/mqtt-backend/node_modules/uuid/dist/esm-node/parse.js
new file mode 100644
index 0000000..80851ff
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/parse.js
@@ -0,0 +1,37 @@
+import validate from './validate.js';
+function parse(uuid) {
+  if (!validate(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+  let v;
+  const arr = new Uint8Array(16);
+
+  // Parse ########-....-....-....-............
+  arr[0] = (v = parseInt(uuid.slice(0, 8), 16)) >>> 24;
+  arr[1] = v >>> 16 & 0xff;
+  arr[2] = v >>> 8 & 0xff;
+  arr[3] = v & 0xff;
+
+  // Parse ........-####-....-....-............
+  arr[4] = (v = parseInt(uuid.slice(9, 13), 16)) >>> 8;
+  arr[5] = v & 0xff;
+
+  // Parse ........-....-####-....-............
+  arr[6] = (v = parseInt(uuid.slice(14, 18), 16)) >>> 8;
+  arr[7] = v & 0xff;
+
+  // Parse ........-....-....-####-............
+  arr[8] = (v = parseInt(uuid.slice(19, 23), 16)) >>> 8;
+  arr[9] = v & 0xff;
+
+  // Parse ........-....-....-....-############
+  // (Use "/" to avoid 32-bit truncation when bit-shifting high-order bytes)
+  arr[10] = (v = parseInt(uuid.slice(24, 36), 16)) / 0x10000000000 & 0xff;
+  arr[11] = v / 0x100000000 & 0xff;
+  arr[12] = v >>> 24 & 0xff;
+  arr[13] = v >>> 16 & 0xff;
+  arr[14] = v >>> 8 & 0xff;
+  arr[15] = v & 0xff;
+  return arr;
+}
+export default parse;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/regex.js b/mqtt-backend/node_modules/uuid/dist/esm-node/regex.js
new file mode 100644
index 0000000..848a1fe
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/regex.js
@@ -0,0 +1 @@
+export default /^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$/i;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/rng.js b/mqtt-backend/node_modules/uuid/dist/esm-node/rng.js
new file mode 100644
index 0000000..69ee524
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/rng.js
@@ -0,0 +1,10 @@
+import crypto from 'node:crypto';
+const rnds8Pool = new Uint8Array(256); // # of random values to pre-allocate
+let poolPtr = rnds8Pool.length;
+export default function rng() {
+  if (poolPtr > rnds8Pool.length - 16) {
+    crypto.randomFillSync(rnds8Pool);
+    poolPtr = 0;
+  }
+  return rnds8Pool.slice(poolPtr, poolPtr += 16);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/sha1.js b/mqtt-backend/node_modules/uuid/dist/esm-node/sha1.js
new file mode 100644
index 0000000..2221787
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/sha1.js
@@ -0,0 +1,10 @@
+import crypto from 'node:crypto';
+function sha1(bytes) {
+  if (Array.isArray(bytes)) {
+    bytes = Buffer.from(bytes);
+  } else if (typeof bytes === 'string') {
+    bytes = Buffer.from(bytes, 'utf8');
+  }
+  return crypto.createHash('sha1').update(bytes).digest();
+}
+export default sha1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/stringify.js b/mqtt-backend/node_modules/uuid/dist/esm-node/stringify.js
new file mode 100644
index 0000000..7792d4e
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/stringify.js
@@ -0,0 +1,31 @@
+import validate from './validate.js';
+
+/**
+ * Convert array of 16 byte values to UUID string format of the form:
+ * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
+ */
+const byteToHex = [];
+for (let i = 0; i < 256; ++i) {
+  byteToHex.push((i + 0x100).toString(16).slice(1));
+}
+export function unsafeStringify(arr, offset = 0) {
+  // Note: Be careful editing this code!  It's been tuned for performance
+  // and works in ways you may not expect. See https://github.com/uuidjs/uuid/pull/434
+  //
+  // Note to future-self: No, you can't remove the `toLowerCase()` call.
+  // REF: https://github.com/uuidjs/uuid/pull/677#issuecomment-1757351351
+  return (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + '-' + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + '-' + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + '-' + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + '-' + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase();
+}
+function stringify(arr, offset = 0) {
+  const uuid = unsafeStringify(arr, offset);
+  // Consistency check for valid UUID.  If this throws, it's likely due to one
+  // of the following:
+  // - One or more input array values don't map to a hex octet (leading to
+  // "undefined" in the uuid)
+  // - Invalid input values for the RFC `version` or `variant` fields
+  if (!validate(uuid)) {
+    throw TypeError('Stringified UUID is invalid');
+  }
+  return uuid;
+}
+export default stringify;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/v1.js b/mqtt-backend/node_modules/uuid/dist/esm-node/v1.js
new file mode 100644
index 0000000..6bf0b1c
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/v1.js
@@ -0,0 +1,125 @@
+import rng from './rng.js';
+import { unsafeStringify } from './stringify.js';
+
+// **`v1()` - Generate time-based UUID**
+//
+// Inspired by https://github.com/LiosK/UUID.js
+// and http://docs.python.org/library/uuid.html
+
+let _nodeId;
+let _clockseq;
+
+// Previous uuid creation time
+let _lastMSecs = 0;
+let _lastNSecs = 0;
+
+// See https://github.com/uuidjs/uuid for API details
+function v1(options, buf, offset) {
+  let i = buf && offset || 0;
+  const b = buf || new Array(16);
+  options = options || {};
+  let node = options.node;
+  let clockseq = options.clockseq;
+
+  // v1 only: Use cached `node` and `clockseq` values
+  if (!options._v6) {
+    if (!node) {
+      node = _nodeId;
+    }
+    if (clockseq == null) {
+      clockseq = _clockseq;
+    }
+  }
+
+  // Handle cases where we need entropy.  We do this lazily to minimize issues
+  // related to insufficient system entropy.  See #189
+  if (node == null || clockseq == null) {
+    const seedBytes = options.random || (options.rng || rng)();
+
+    // Randomize node
+    if (node == null) {
+      node = [seedBytes[0], seedBytes[1], seedBytes[2], seedBytes[3], seedBytes[4], seedBytes[5]];
+
+      // v1 only: cache node value for reuse
+      if (!_nodeId && !options._v6) {
+        // per RFC4122 4.5: Set MAC multicast bit (v1 only)
+        node[0] |= 0x01; // Set multicast bit
+
+        _nodeId = node;
+      }
+    }
+
+    // Randomize clockseq
+    if (clockseq == null) {
+      // Per 4.2.2, randomize (14 bit) clockseq
+      clockseq = (seedBytes[6] << 8 | seedBytes[7]) & 0x3fff;
+      if (_clockseq === undefined && !options._v6) {
+        _clockseq = clockseq;
+      }
+    }
+  }
+
+  // v1 & v6 timestamps are 100 nano-second units since the Gregorian epoch,
+  // (1582-10-15 00:00).  JSNumbers aren't precise enough for this, so time is
+  // handled internally as 'msecs' (integer milliseconds) and 'nsecs'
+  // (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01 00:00.
+  let msecs = options.msecs !== undefined ? options.msecs : Date.now();
+
+  // Per 4.2.1.2, use count of uuid's generated during the current clock
+  // cycle to simulate higher resolution clock
+  let nsecs = options.nsecs !== undefined ? options.nsecs : _lastNSecs + 1;
+
+  // Time since last uuid creation (in msecs)
+  const dt = msecs - _lastMSecs + (nsecs - _lastNSecs) / 10000;
+
+  // Per 4.2.1.2, Bump clockseq on clock regression
+  if (dt < 0 && options.clockseq === undefined) {
+    clockseq = clockseq + 1 & 0x3fff;
+  }
+
+  // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
+  // time interval
+  if ((dt < 0 || msecs > _lastMSecs) && options.nsecs === undefined) {
+    nsecs = 0;
+  }
+
+  // Per 4.2.1.2 Throw error if too many uuids are requested
+  if (nsecs >= 10000) {
+    throw new Error("uuid.v1(): Can't create more than 10M uuids/sec");
+  }
+  _lastMSecs = msecs;
+  _lastNSecs = nsecs;
+  _clockseq = clockseq;
+
+  // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
+  msecs += 12219292800000;
+
+  // `time_low`
+  const tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
+  b[i++] = tl >>> 24 & 0xff;
+  b[i++] = tl >>> 16 & 0xff;
+  b[i++] = tl >>> 8 & 0xff;
+  b[i++] = tl & 0xff;
+
+  // `time_mid`
+  const tmh = msecs / 0x100000000 * 10000 & 0xfffffff;
+  b[i++] = tmh >>> 8 & 0xff;
+  b[i++] = tmh & 0xff;
+
+  // `time_high_and_version`
+  b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
+  b[i++] = tmh >>> 16 & 0xff;
+
+  // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
+  b[i++] = clockseq >>> 8 | 0x80;
+
+  // `clock_seq_low`
+  b[i++] = clockseq & 0xff;
+
+  // `node`
+  for (let n = 0; n < 6; ++n) {
+    b[i + n] = node[n];
+  }
+  return buf || unsafeStringify(b);
+}
+export default v1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/v1ToV6.js b/mqtt-backend/node_modules/uuid/dist/esm-node/v1ToV6.js
new file mode 100644
index 0000000..15aea2f
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/v1ToV6.js
@@ -0,0 +1,20 @@
+import parse from './parse.js';
+import { unsafeStringify } from './stringify.js';
+
+/**
+ * Convert a v1 UUID to a v6 UUID
+ *
+ * @param {string|Uint8Array} uuid - The v1 UUID to convert to v6
+ * @returns {string|Uint8Array} The v6 UUID as the same type as the `uuid` arg
+ * (string or Uint8Array)
+ */
+export default function v1ToV6(uuid) {
+  const v1Bytes = typeof uuid === 'string' ? parse(uuid) : uuid;
+  const v6Bytes = _v1ToV6(v1Bytes);
+  return typeof uuid === 'string' ? unsafeStringify(v6Bytes) : v6Bytes;
+}
+
+// Do the field transformation needed for v1 -> v6
+function _v1ToV6(v1Bytes, randomize = false) {
+  return Uint8Array.of((v1Bytes[6] & 0x0f) << 4 | v1Bytes[7] >> 4 & 0x0f, (v1Bytes[7] & 0x0f) << 4 | (v1Bytes[4] & 0xf0) >> 4, (v1Bytes[4] & 0x0f) << 4 | (v1Bytes[5] & 0xf0) >> 4, (v1Bytes[5] & 0x0f) << 4 | (v1Bytes[0] & 0xf0) >> 4, (v1Bytes[0] & 0x0f) << 4 | (v1Bytes[1] & 0xf0) >> 4, (v1Bytes[1] & 0x0f) << 4 | (v1Bytes[2] & 0xf0) >> 4, 0x60 | v1Bytes[2] & 0x0f, v1Bytes[3], v1Bytes[8], v1Bytes[9], v1Bytes[10], v1Bytes[11], v1Bytes[12], v1Bytes[13], v1Bytes[14], v1Bytes[15]);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/v3.js b/mqtt-backend/node_modules/uuid/dist/esm-node/v3.js
new file mode 100644
index 0000000..09063b8
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/v3.js
@@ -0,0 +1,4 @@
+import v35 from './v35.js';
+import md5 from './md5.js';
+const v3 = v35('v3', 0x30, md5);
+export default v3;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/v35.js b/mqtt-backend/node_modules/uuid/dist/esm-node/v35.js
new file mode 100644
index 0000000..013c869
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/v35.js
@@ -0,0 +1,55 @@
+import { unsafeStringify } from './stringify.js';
+import parse from './parse.js';
+function stringToBytes(str) {
+  str = unescape(encodeURIComponent(str)); // UTF8 escape
+
+  const bytes = [];
+  for (let i = 0; i < str.length; ++i) {
+    bytes.push(str.charCodeAt(i));
+  }
+  return bytes;
+}
+export const DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
+export const URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';
+export default function v35(name, version, hashfunc) {
+  function generateUUID(value, namespace, buf, offset) {
+    var _namespace;
+    if (typeof value === 'string') {
+      value = stringToBytes(value);
+    }
+    if (typeof namespace === 'string') {
+      namespace = parse(namespace);
+    }
+    if (((_namespace = namespace) === null || _namespace === void 0 ? void 0 : _namespace.length) !== 16) {
+      throw TypeError('Namespace must be array-like (16 iterable integer values, 0-255)');
+    }
+
+    // Compute hash of namespace and value, Per 4.3
+    // Future: Use spread syntax when supported on all platforms, e.g. `bytes =
+    // hashfunc([...namespace, ... value])`
+    let bytes = new Uint8Array(16 + value.length);
+    bytes.set(namespace);
+    bytes.set(value, namespace.length);
+    bytes = hashfunc(bytes);
+    bytes[6] = bytes[6] & 0x0f | version;
+    bytes[8] = bytes[8] & 0x3f | 0x80;
+    if (buf) {
+      offset = offset || 0;
+      for (let i = 0; i < 16; ++i) {
+        buf[offset + i] = bytes[i];
+      }
+      return buf;
+    }
+    return unsafeStringify(bytes);
+  }
+
+  // Function#name is not settable on some platforms (#270)
+  try {
+    generateUUID.name = name;
+  } catch (err) {}
+
+  // For CommonJS default export support
+  generateUUID.DNS = DNS;
+  generateUUID.URL = URL;
+  return generateUUID;
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/v4.js b/mqtt-backend/node_modules/uuid/dist/esm-node/v4.js
new file mode 100644
index 0000000..ed1db71
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/v4.js
@@ -0,0 +1,25 @@
+import native from './native.js';
+import rng from './rng.js';
+import { unsafeStringify } from './stringify.js';
+function v4(options, buf, offset) {
+  if (native.randomUUID && !buf && !options) {
+    return native.randomUUID();
+  }
+  options = options || {};
+  const rnds = options.random || (options.rng || rng)();
+
+  // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
+  rnds[6] = rnds[6] & 0x0f | 0x40;
+  rnds[8] = rnds[8] & 0x3f | 0x80;
+
+  // Copy bytes to buffer, if provided
+  if (buf) {
+    offset = offset || 0;
+    for (let i = 0; i < 16; ++i) {
+      buf[offset + i] = rnds[i];
+    }
+    return buf;
+  }
+  return unsafeStringify(rnds);
+}
+export default v4;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/v5.js b/mqtt-backend/node_modules/uuid/dist/esm-node/v5.js
new file mode 100644
index 0000000..e87fe31
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/v5.js
@@ -0,0 +1,4 @@
+import v35 from './v35.js';
+import sha1 from './sha1.js';
+const v5 = v35('v5', 0x50, sha1);
+export default v5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/v6.js b/mqtt-backend/node_modules/uuid/dist/esm-node/v6.js
new file mode 100644
index 0000000..673d025
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/v6.js
@@ -0,0 +1,32 @@
+import { unsafeStringify } from './stringify.js';
+import v1 from './v1.js';
+import v1ToV6 from './v1ToV6.js';
+
+/**
+ *
+ * @param {object} options
+ * @param {Uint8Array=} buf
+ * @param {number=} offset
+ * @returns
+ */
+export default function v6(options = {}, buf, offset = 0) {
+  // v6 is v1 with different field layout, so we start with a v1 UUID, albeit
+  // with slightly different behavior around how the clock_seq and node fields
+  // are randomized, which is why we call v1 with _v6: true.
+  let bytes = v1({
+    ...options,
+    _v6: true
+  }, new Uint8Array(16));
+
+  // Reorder the fields to v6 layout.
+  bytes = v1ToV6(bytes);
+
+  // Return as a byte array if requested
+  if (buf) {
+    for (let i = 0; i < 16; i++) {
+      buf[offset + i] = bytes[i];
+    }
+    return buf;
+  }
+  return unsafeStringify(bytes);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/v6ToV1.js b/mqtt-backend/node_modules/uuid/dist/esm-node/v6ToV1.js
new file mode 100644
index 0000000..e2fdfff
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/v6ToV1.js
@@ -0,0 +1,20 @@
+import parse from './parse.js';
+import { unsafeStringify } from './stringify.js';
+
+/**
+ * Convert a v6 UUID to a v1 UUID
+ *
+ * @param {string|Uint8Array} uuid - The v6 UUID to convert to v6
+ * @returns {string|Uint8Array} The v1 UUID as the same type as the `uuid` arg
+ * (string or Uint8Array)
+ */
+export default function v6ToV1(uuid) {
+  const v6Bytes = typeof uuid === 'string' ? parse(uuid) : uuid;
+  const v1Bytes = _v6ToV1(v6Bytes);
+  return typeof uuid === 'string' ? unsafeStringify(v1Bytes) : v1Bytes;
+}
+
+// Do the field transformation needed for v6 -> v1
+function _v6ToV1(v6Bytes) {
+  return Uint8Array.of((v6Bytes[3] & 0x0f) << 4 | v6Bytes[4] >> 4 & 0x0f, (v6Bytes[4] & 0x0f) << 4 | (v6Bytes[5] & 0xf0) >> 4, (v6Bytes[5] & 0x0f) << 4 | v6Bytes[6] & 0x0f, v6Bytes[7], (v6Bytes[1] & 0x0f) << 4 | (v6Bytes[2] & 0xf0) >> 4, (v6Bytes[2] & 0x0f) << 4 | (v6Bytes[3] & 0xf0) >> 4, 0x10 | (v6Bytes[0] & 0xf0) >> 4, (v6Bytes[0] & 0x0f) << 4 | (v6Bytes[1] & 0xf0) >> 4, v6Bytes[8], v6Bytes[9], v6Bytes[10], v6Bytes[11], v6Bytes[12], v6Bytes[13], v6Bytes[14], v6Bytes[15]);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/v7.js b/mqtt-backend/node_modules/uuid/dist/esm-node/v7.js
new file mode 100644
index 0000000..18159e1
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/v7.js
@@ -0,0 +1,146 @@
+import rng from './rng.js';
+import { unsafeStringify } from './stringify.js';
+
+/**
+ * UUID V7 - Unix Epoch time-based UUID
+ *
+ * The IETF has published RFC9562, introducing 3 new UUID versions (6,7,8). This
+ * implementation of V7 is based on the accepted, though not yet approved,
+ * revisions.
+ *
+ * RFC 9562:https://www.rfc-editor.org/rfc/rfc9562.html Universally Unique
+ * IDentifiers (UUIDs)
+
+ *
+ * Sample V7 value:
+ * https://www.rfc-editor.org/rfc/rfc9562.html#name-example-of-a-uuidv7-value
+ *
+ * Monotonic Bit Layout: RFC rfc9562.6.2 Method 1, Dedicated Counter Bits ref:
+ *     https://www.rfc-editor.org/rfc/rfc9562.html#section-6.2-5.1
+ *
+ *   0                   1                   2                   3 0 1 2 3 4 5 6
+ *   7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |                          unix_ts_ms                           |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |          unix_ts_ms           |  ver  |        seq_hi         |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |var|               seq_low               |        rand         |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |                             rand                              |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * seq is a 31 bit serialized counter; comprised of 12 bit seq_hi and 19 bit
+ * seq_low, and randomly initialized upon timestamp change. 31 bit counter size
+ * was selected as any bitwise operations in node are done as _signed_ 32 bit
+ * ints. we exclude the sign bit.
+ */
+
+let _seqLow = null;
+let _seqHigh = null;
+let _msecs = 0;
+function v7(options, buf, offset) {
+  options = options || {};
+
+  // initialize buffer and pointer
+  let i = buf && offset || 0;
+  const b = buf || new Uint8Array(16);
+
+  // rnds is Uint8Array(16) filled with random bytes
+  const rnds = options.random || (options.rng || rng)();
+
+  // milliseconds since unix epoch, 1970-01-01 00:00
+  const msecs = options.msecs !== undefined ? options.msecs : Date.now();
+
+  // seq is user provided 31 bit counter
+  let seq = options.seq !== undefined ? options.seq : null;
+
+  // initialize local seq high/low parts
+  let seqHigh = _seqHigh;
+  let seqLow = _seqLow;
+
+  // check if clock has advanced and user has not provided msecs
+  if (msecs > _msecs && options.msecs === undefined) {
+    _msecs = msecs;
+
+    // unless user provided seq, reset seq parts
+    if (seq !== null) {
+      seqHigh = null;
+      seqLow = null;
+    }
+  }
+
+  // if we have a user provided seq
+  if (seq !== null) {
+    // trim provided seq to 31 bits of value, avoiding overflow
+    if (seq > 0x7fffffff) {
+      seq = 0x7fffffff;
+    }
+
+    // split provided seq into high/low parts
+    seqHigh = seq >>> 19 & 0xfff;
+    seqLow = seq & 0x7ffff;
+  }
+
+  // randomly initialize seq
+  if (seqHigh === null || seqLow === null) {
+    seqHigh = rnds[6] & 0x7f;
+    seqHigh = seqHigh << 8 | rnds[7];
+    seqLow = rnds[8] & 0x3f; // pad for var
+    seqLow = seqLow << 8 | rnds[9];
+    seqLow = seqLow << 5 | rnds[10] >>> 3;
+  }
+
+  // increment seq if within msecs window
+  if (msecs + 10000 > _msecs && seq === null) {
+    if (++seqLow > 0x7ffff) {
+      seqLow = 0;
+      if (++seqHigh > 0xfff) {
+        seqHigh = 0;
+
+        // increment internal _msecs. this allows us to continue incrementing
+        // while staying monotonic. Note, once we hit 10k milliseconds beyond system
+        // clock, we will reset breaking monotonicity (after (2^31)*10000 generations)
+        _msecs++;
+      }
+    }
+  } else {
+    // resetting; we have advanced more than
+    // 10k milliseconds beyond system clock
+    _msecs = msecs;
+  }
+  _seqHigh = seqHigh;
+  _seqLow = seqLow;
+
+  // [bytes 0-5] 48 bits of local timestamp
+  b[i++] = _msecs / 0x10000000000 & 0xff;
+  b[i++] = _msecs / 0x100000000 & 0xff;
+  b[i++] = _msecs / 0x1000000 & 0xff;
+  b[i++] = _msecs / 0x10000 & 0xff;
+  b[i++] = _msecs / 0x100 & 0xff;
+  b[i++] = _msecs & 0xff;
+
+  // [byte 6] - set 4 bits of version (7) with first 4 bits seq_hi
+  b[i++] = seqHigh >>> 4 & 0x0f | 0x70;
+
+  // [byte 7] remaining 8 bits of seq_hi
+  b[i++] = seqHigh & 0xff;
+
+  // [byte 8] - variant (2 bits), first 6 bits seq_low
+  b[i++] = seqLow >>> 13 & 0x3f | 0x80;
+
+  // [byte 9] 8 bits seq_low
+  b[i++] = seqLow >>> 5 & 0xff;
+
+  // [byte 10] remaining 5 bits seq_low, 3 bits random
+  b[i++] = seqLow << 3 & 0xff | rnds[10] & 0x07;
+
+  // [bytes 11-15] always random
+  b[i++] = rnds[11];
+  b[i++] = rnds[12];
+  b[i++] = rnds[13];
+  b[i++] = rnds[14];
+  b[i++] = rnds[15];
+  return buf || unsafeStringify(b);
+}
+export default v7;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/validate.js b/mqtt-backend/node_modules/uuid/dist/esm-node/validate.js
new file mode 100644
index 0000000..6e40fa5
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/validate.js
@@ -0,0 +1,5 @@
+import REGEX from './regex.js';
+function validate(uuid) {
+  return typeof uuid === 'string' && REGEX.test(uuid);
+}
+export default validate;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/esm-node/version.js b/mqtt-backend/node_modules/uuid/dist/esm-node/version.js
new file mode 100644
index 0000000..4ca924e
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/esm-node/version.js
@@ -0,0 +1,8 @@
+import validate from './validate.js';
+function version(uuid) {
+  if (!validate(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+  return parseInt(uuid.slice(14, 15), 16);
+}
+export default version;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/index.js b/mqtt-backend/node_modules/uuid/dist/index.js
new file mode 100644
index 0000000..cd6eb74
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/index.js
@@ -0,0 +1,104 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+Object.defineProperty(exports, "MAX", {
+  enumerable: true,
+  get: function () {
+    return _max.default;
+  }
+});
+Object.defineProperty(exports, "NIL", {
+  enumerable: true,
+  get: function () {
+    return _nil.default;
+  }
+});
+Object.defineProperty(exports, "parse", {
+  enumerable: true,
+  get: function () {
+    return _parse.default;
+  }
+});
+Object.defineProperty(exports, "stringify", {
+  enumerable: true,
+  get: function () {
+    return _stringify.default;
+  }
+});
+Object.defineProperty(exports, "v1", {
+  enumerable: true,
+  get: function () {
+    return _v.default;
+  }
+});
+Object.defineProperty(exports, "v1ToV6", {
+  enumerable: true,
+  get: function () {
+    return _v1ToV.default;
+  }
+});
+Object.defineProperty(exports, "v3", {
+  enumerable: true,
+  get: function () {
+    return _v2.default;
+  }
+});
+Object.defineProperty(exports, "v4", {
+  enumerable: true,
+  get: function () {
+    return _v3.default;
+  }
+});
+Object.defineProperty(exports, "v5", {
+  enumerable: true,
+  get: function () {
+    return _v4.default;
+  }
+});
+Object.defineProperty(exports, "v6", {
+  enumerable: true,
+  get: function () {
+    return _v5.default;
+  }
+});
+Object.defineProperty(exports, "v6ToV1", {
+  enumerable: true,
+  get: function () {
+    return _v6ToV.default;
+  }
+});
+Object.defineProperty(exports, "v7", {
+  enumerable: true,
+  get: function () {
+    return _v6.default;
+  }
+});
+Object.defineProperty(exports, "validate", {
+  enumerable: true,
+  get: function () {
+    return _validate.default;
+  }
+});
+Object.defineProperty(exports, "version", {
+  enumerable: true,
+  get: function () {
+    return _version.default;
+  }
+});
+var _max = _interopRequireDefault(require("./max.js"));
+var _nil = _interopRequireDefault(require("./nil.js"));
+var _parse = _interopRequireDefault(require("./parse.js"));
+var _stringify = _interopRequireDefault(require("./stringify.js"));
+var _v = _interopRequireDefault(require("./v1.js"));
+var _v1ToV = _interopRequireDefault(require("./v1ToV6.js"));
+var _v2 = _interopRequireDefault(require("./v3.js"));
+var _v3 = _interopRequireDefault(require("./v4.js"));
+var _v4 = _interopRequireDefault(require("./v5.js"));
+var _v5 = _interopRequireDefault(require("./v6.js"));
+var _v6ToV = _interopRequireDefault(require("./v6ToV1.js"));
+var _v6 = _interopRequireDefault(require("./v7.js"));
+var _validate = _interopRequireDefault(require("./validate.js"));
+var _version = _interopRequireDefault(require("./version.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/max.js b/mqtt-backend/node_modules/uuid/dist/max.js
new file mode 100644
index 0000000..8de76f8
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/max.js
@@ -0,0 +1,7 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _default = exports.default = 'ffffffff-ffff-ffff-ffff-ffffffffffff';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/md5-browser.js b/mqtt-backend/node_modules/uuid/dist/md5-browser.js
new file mode 100644
index 0000000..f0d31f5
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/md5-browser.js
@@ -0,0 +1,200 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+/*
+ * Browser-compatible JavaScript MD5
+ *
+ * Modification of JavaScript MD5
+ * https://github.com/blueimp/JavaScript-MD5
+ *
+ * Copyright 2011, Sebastian Tschan
+ * https://blueimp.net
+ *
+ * Licensed under the MIT license:
+ * https://opensource.org/licenses/MIT
+ *
+ * Based on
+ * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+ * Digest Algorithm, as defined in RFC 1321.
+ * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for more info.
+ */
+function md5(bytes) {
+  if (typeof bytes === 'string') {
+    const msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
+
+    bytes = new Uint8Array(msg.length);
+    for (let i = 0; i < msg.length; ++i) {
+      bytes[i] = msg.charCodeAt(i);
+    }
+  }
+  return md5ToHexEncodedArray(wordsToMd5(bytesToWords(bytes), bytes.length * 8));
+}
+
+/*
+ * Convert an array of little-endian words to an array of bytes
+ */
+function md5ToHexEncodedArray(input) {
+  const output = [];
+  const length32 = input.length * 32;
+  const hexTab = '0123456789abcdef';
+  for (let i = 0; i < length32; i += 8) {
+    const x = input[i >> 5] >>> i % 32 & 0xff;
+    const hex = parseInt(hexTab.charAt(x >>> 4 & 0x0f) + hexTab.charAt(x & 0x0f), 16);
+    output.push(hex);
+  }
+  return output;
+}
+
+/**
+ * Calculate output length with padding and bit length
+ */
+function getOutputLength(inputLength8) {
+  return (inputLength8 + 64 >>> 9 << 4) + 14 + 1;
+}
+
+/*
+ * Calculate the MD5 of an array of little-endian words, and a bit length.
+ */
+function wordsToMd5(x, len) {
+  /* append padding */
+  x[len >> 5] |= 0x80 << len % 32;
+  x[getOutputLength(len) - 1] = len;
+  let a = 1732584193;
+  let b = -271733879;
+  let c = -1732584194;
+  let d = 271733878;
+  for (let i = 0; i < x.length; i += 16) {
+    const olda = a;
+    const oldb = b;
+    const oldc = c;
+    const oldd = d;
+    a = md5ff(a, b, c, d, x[i], 7, -680876936);
+    d = md5ff(d, a, b, c, x[i + 1], 12, -389564586);
+    c = md5ff(c, d, a, b, x[i + 2], 17, 606105819);
+    b = md5ff(b, c, d, a, x[i + 3], 22, -1044525330);
+    a = md5ff(a, b, c, d, x[i + 4], 7, -176418897);
+    d = md5ff(d, a, b, c, x[i + 5], 12, 1200080426);
+    c = md5ff(c, d, a, b, x[i + 6], 17, -1473231341);
+    b = md5ff(b, c, d, a, x[i + 7], 22, -45705983);
+    a = md5ff(a, b, c, d, x[i + 8], 7, 1770035416);
+    d = md5ff(d, a, b, c, x[i + 9], 12, -1958414417);
+    c = md5ff(c, d, a, b, x[i + 10], 17, -42063);
+    b = md5ff(b, c, d, a, x[i + 11], 22, -1990404162);
+    a = md5ff(a, b, c, d, x[i + 12], 7, 1804603682);
+    d = md5ff(d, a, b, c, x[i + 13], 12, -40341101);
+    c = md5ff(c, d, a, b, x[i + 14], 17, -1502002290);
+    b = md5ff(b, c, d, a, x[i + 15], 22, 1236535329);
+    a = md5gg(a, b, c, d, x[i + 1], 5, -165796510);
+    d = md5gg(d, a, b, c, x[i + 6], 9, -1069501632);
+    c = md5gg(c, d, a, b, x[i + 11], 14, 643717713);
+    b = md5gg(b, c, d, a, x[i], 20, -373897302);
+    a = md5gg(a, b, c, d, x[i + 5], 5, -701558691);
+    d = md5gg(d, a, b, c, x[i + 10], 9, 38016083);
+    c = md5gg(c, d, a, b, x[i + 15], 14, -660478335);
+    b = md5gg(b, c, d, a, x[i + 4], 20, -405537848);
+    a = md5gg(a, b, c, d, x[i + 9], 5, 568446438);
+    d = md5gg(d, a, b, c, x[i + 14], 9, -1019803690);
+    c = md5gg(c, d, a, b, x[i + 3], 14, -187363961);
+    b = md5gg(b, c, d, a, x[i + 8], 20, 1163531501);
+    a = md5gg(a, b, c, d, x[i + 13], 5, -1444681467);
+    d = md5gg(d, a, b, c, x[i + 2], 9, -51403784);
+    c = md5gg(c, d, a, b, x[i + 7], 14, 1735328473);
+    b = md5gg(b, c, d, a, x[i + 12], 20, -1926607734);
+    a = md5hh(a, b, c, d, x[i + 5], 4, -378558);
+    d = md5hh(d, a, b, c, x[i + 8], 11, -2022574463);
+    c = md5hh(c, d, a, b, x[i + 11], 16, 1839030562);
+    b = md5hh(b, c, d, a, x[i + 14], 23, -35309556);
+    a = md5hh(a, b, c, d, x[i + 1], 4, -1530992060);
+    d = md5hh(d, a, b, c, x[i + 4], 11, 1272893353);
+    c = md5hh(c, d, a, b, x[i + 7], 16, -155497632);
+    b = md5hh(b, c, d, a, x[i + 10], 23, -1094730640);
+    a = md5hh(a, b, c, d, x[i + 13], 4, 681279174);
+    d = md5hh(d, a, b, c, x[i], 11, -358537222);
+    c = md5hh(c, d, a, b, x[i + 3], 16, -722521979);
+    b = md5hh(b, c, d, a, x[i + 6], 23, 76029189);
+    a = md5hh(a, b, c, d, x[i + 9], 4, -640364487);
+    d = md5hh(d, a, b, c, x[i + 12], 11, -421815835);
+    c = md5hh(c, d, a, b, x[i + 15], 16, 530742520);
+    b = md5hh(b, c, d, a, x[i + 2], 23, -995338651);
+    a = md5ii(a, b, c, d, x[i], 6, -198630844);
+    d = md5ii(d, a, b, c, x[i + 7], 10, 1126891415);
+    c = md5ii(c, d, a, b, x[i + 14], 15, -1416354905);
+    b = md5ii(b, c, d, a, x[i + 5], 21, -57434055);
+    a = md5ii(a, b, c, d, x[i + 12], 6, 1700485571);
+    d = md5ii(d, a, b, c, x[i + 3], 10, -1894986606);
+    c = md5ii(c, d, a, b, x[i + 10], 15, -1051523);
+    b = md5ii(b, c, d, a, x[i + 1], 21, -2054922799);
+    a = md5ii(a, b, c, d, x[i + 8], 6, 1873313359);
+    d = md5ii(d, a, b, c, x[i + 15], 10, -30611744);
+    c = md5ii(c, d, a, b, x[i + 6], 15, -1560198380);
+    b = md5ii(b, c, d, a, x[i + 13], 21, 1309151649);
+    a = md5ii(a, b, c, d, x[i + 4], 6, -145523070);
+    d = md5ii(d, a, b, c, x[i + 11], 10, -1120210379);
+    c = md5ii(c, d, a, b, x[i + 2], 15, 718787259);
+    b = md5ii(b, c, d, a, x[i + 9], 21, -343485551);
+    a = safeAdd(a, olda);
+    b = safeAdd(b, oldb);
+    c = safeAdd(c, oldc);
+    d = safeAdd(d, oldd);
+  }
+  return [a, b, c, d];
+}
+
+/*
+ * Convert an array bytes to an array of little-endian words
+ * Characters >255 have their high-byte silently ignored.
+ */
+function bytesToWords(input) {
+  if (input.length === 0) {
+    return [];
+  }
+  const length8 = input.length * 8;
+  const output = new Uint32Array(getOutputLength(length8));
+  for (let i = 0; i < length8; i += 8) {
+    output[i >> 5] |= (input[i / 8] & 0xff) << i % 32;
+  }
+  return output;
+}
+
+/*
+ * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+ * to work around bugs in some JS interpreters.
+ */
+function safeAdd(x, y) {
+  const lsw = (x & 0xffff) + (y & 0xffff);
+  const msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+  return msw << 16 | lsw & 0xffff;
+}
+
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+function bitRotateLeft(num, cnt) {
+  return num << cnt | num >>> 32 - cnt;
+}
+
+/*
+ * These functions implement the four basic operations the algorithm uses.
+ */
+function md5cmn(q, a, b, x, s, t) {
+  return safeAdd(bitRotateLeft(safeAdd(safeAdd(a, q), safeAdd(x, t)), s), b);
+}
+function md5ff(a, b, c, d, x, s, t) {
+  return md5cmn(b & c | ~b & d, a, b, x, s, t);
+}
+function md5gg(a, b, c, d, x, s, t) {
+  return md5cmn(b & d | c & ~d, a, b, x, s, t);
+}
+function md5hh(a, b, c, d, x, s, t) {
+  return md5cmn(b ^ c ^ d, a, b, x, s, t);
+}
+function md5ii(a, b, c, d, x, s, t) {
+  return md5cmn(c ^ (b | ~d), a, b, x, s, t);
+}
+var _default = exports.default = md5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/md5.js b/mqtt-backend/node_modules/uuid/dist/md5.js
new file mode 100644
index 0000000..135b24d
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/md5.js
@@ -0,0 +1,17 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _nodeCrypto = _interopRequireDefault(require("node:crypto"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function md5(bytes) {
+  if (Array.isArray(bytes)) {
+    bytes = Buffer.from(bytes);
+  } else if (typeof bytes === 'string') {
+    bytes = Buffer.from(bytes, 'utf8');
+  }
+  return _nodeCrypto.default.createHash('md5').update(bytes).digest();
+}
+var _default = exports.default = md5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/native-browser.js b/mqtt-backend/node_modules/uuid/dist/native-browser.js
new file mode 100644
index 0000000..bc5d383
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/native-browser.js
@@ -0,0 +1,10 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+const randomUUID = typeof crypto !== 'undefined' && crypto.randomUUID && crypto.randomUUID.bind(crypto);
+var _default = exports.default = {
+  randomUUID
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/native.js b/mqtt-backend/node_modules/uuid/dist/native.js
new file mode 100644
index 0000000..4c273c5
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/native.js
@@ -0,0 +1,11 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _nodeCrypto = _interopRequireDefault(require("node:crypto"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+var _default = exports.default = {
+  randomUUID: _nodeCrypto.default.randomUUID
+};
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/nil.js b/mqtt-backend/node_modules/uuid/dist/nil.js
new file mode 100644
index 0000000..f7967e9
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/nil.js
@@ -0,0 +1,7 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _default = exports.default = '00000000-0000-0000-0000-000000000000';
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/parse.js b/mqtt-backend/node_modules/uuid/dist/parse.js
new file mode 100644
index 0000000..1707c90
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/parse.js
@@ -0,0 +1,44 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _validate = _interopRequireDefault(require("./validate.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function parse(uuid) {
+  if (!(0, _validate.default)(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+  let v;
+  const arr = new Uint8Array(16);
+
+  // Parse ########-....-....-....-............
+  arr[0] = (v = parseInt(uuid.slice(0, 8), 16)) >>> 24;
+  arr[1] = v >>> 16 & 0xff;
+  arr[2] = v >>> 8 & 0xff;
+  arr[3] = v & 0xff;
+
+  // Parse ........-####-....-....-............
+  arr[4] = (v = parseInt(uuid.slice(9, 13), 16)) >>> 8;
+  arr[5] = v & 0xff;
+
+  // Parse ........-....-####-....-............
+  arr[6] = (v = parseInt(uuid.slice(14, 18), 16)) >>> 8;
+  arr[7] = v & 0xff;
+
+  // Parse ........-....-....-####-............
+  arr[8] = (v = parseInt(uuid.slice(19, 23), 16)) >>> 8;
+  arr[9] = v & 0xff;
+
+  // Parse ........-....-....-....-############
+  // (Use "/" to avoid 32-bit truncation when bit-shifting high-order bytes)
+  arr[10] = (v = parseInt(uuid.slice(24, 36), 16)) / 0x10000000000 & 0xff;
+  arr[11] = v / 0x100000000 & 0xff;
+  arr[12] = v >>> 24 & 0xff;
+  arr[13] = v >>> 16 & 0xff;
+  arr[14] = v >>> 8 & 0xff;
+  arr[15] = v & 0xff;
+  return arr;
+}
+var _default = exports.default = parse;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/regex.js b/mqtt-backend/node_modules/uuid/dist/regex.js
new file mode 100644
index 0000000..fc02a88
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/regex.js
@@ -0,0 +1,7 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _default = exports.default = /^(?:[0-9a-f]{8}-[0-9a-f]{4}-[1-8][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$/i;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/rng-browser.js b/mqtt-backend/node_modules/uuid/dist/rng-browser.js
new file mode 100644
index 0000000..e257738
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/rng-browser.js
@@ -0,0 +1,23 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = rng;
+// Unique ID creation requires a high quality random # generator. In the browser we therefore
+// require the crypto API and do not support built-in fallback to lower quality random number
+// generators (like Math.random()).
+
+let getRandomValues;
+const rnds8 = new Uint8Array(16);
+function rng() {
+  // lazy load so that environments that need to polyfill have a chance to do so
+  if (!getRandomValues) {
+    // getRandomValues needs to be invoked in a context where "this" is a Crypto implementation.
+    getRandomValues = typeof crypto !== 'undefined' && crypto.getRandomValues && crypto.getRandomValues.bind(crypto);
+    if (!getRandomValues) {
+      throw new Error('crypto.getRandomValues() not supported. See https://github.com/uuidjs/uuid#getrandomvalues-not-supported');
+    }
+  }
+  return getRandomValues(rnds8);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/rng.js b/mqtt-backend/node_modules/uuid/dist/rng.js
new file mode 100644
index 0000000..f5eb9a1
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/rng.js
@@ -0,0 +1,17 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = rng;
+var _nodeCrypto = _interopRequireDefault(require("node:crypto"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+const rnds8Pool = new Uint8Array(256); // # of random values to pre-allocate
+let poolPtr = rnds8Pool.length;
+function rng() {
+  if (poolPtr > rnds8Pool.length - 16) {
+    _nodeCrypto.default.randomFillSync(rnds8Pool);
+    poolPtr = 0;
+  }
+  return rnds8Pool.slice(poolPtr, poolPtr += 16);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/sha1-browser.js b/mqtt-backend/node_modules/uuid/dist/sha1-browser.js
new file mode 100644
index 0000000..ded98db
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/sha1-browser.js
@@ -0,0 +1,82 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+// Adapted from Chris Veness' SHA1 code at
+// http://www.movable-type.co.uk/scripts/sha1.html
+function f(s, x, y, z) {
+  switch (s) {
+    case 0:
+      return x & y ^ ~x & z;
+    case 1:
+      return x ^ y ^ z;
+    case 2:
+      return x & y ^ x & z ^ y & z;
+    case 3:
+      return x ^ y ^ z;
+  }
+}
+function ROTL(x, n) {
+  return x << n | x >>> 32 - n;
+}
+function sha1(bytes) {
+  const K = [0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6];
+  const H = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];
+  if (typeof bytes === 'string') {
+    const msg = unescape(encodeURIComponent(bytes)); // UTF8 escape
+
+    bytes = [];
+    for (let i = 0; i < msg.length; ++i) {
+      bytes.push(msg.charCodeAt(i));
+    }
+  } else if (!Array.isArray(bytes)) {
+    // Convert Array-like to Array
+    bytes = Array.prototype.slice.call(bytes);
+  }
+  bytes.push(0x80);
+  const l = bytes.length / 4 + 2;
+  const N = Math.ceil(l / 16);
+  const M = new Array(N);
+  for (let i = 0; i < N; ++i) {
+    const arr = new Uint32Array(16);
+    for (let j = 0; j < 16; ++j) {
+      arr[j] = bytes[i * 64 + j * 4] << 24 | bytes[i * 64 + j * 4 + 1] << 16 | bytes[i * 64 + j * 4 + 2] << 8 | bytes[i * 64 + j * 4 + 3];
+    }
+    M[i] = arr;
+  }
+  M[N - 1][14] = (bytes.length - 1) * 8 / Math.pow(2, 32);
+  M[N - 1][14] = Math.floor(M[N - 1][14]);
+  M[N - 1][15] = (bytes.length - 1) * 8 & 0xffffffff;
+  for (let i = 0; i < N; ++i) {
+    const W = new Uint32Array(80);
+    for (let t = 0; t < 16; ++t) {
+      W[t] = M[i][t];
+    }
+    for (let t = 16; t < 80; ++t) {
+      W[t] = ROTL(W[t - 3] ^ W[t - 8] ^ W[t - 14] ^ W[t - 16], 1);
+    }
+    let a = H[0];
+    let b = H[1];
+    let c = H[2];
+    let d = H[3];
+    let e = H[4];
+    for (let t = 0; t < 80; ++t) {
+      const s = Math.floor(t / 20);
+      const T = ROTL(a, 5) + f(s, b, c, d) + e + K[s] + W[t] >>> 0;
+      e = d;
+      d = c;
+      c = ROTL(b, 30) >>> 0;
+      b = a;
+      a = T;
+    }
+    H[0] = H[0] + a >>> 0;
+    H[1] = H[1] + b >>> 0;
+    H[2] = H[2] + c >>> 0;
+    H[3] = H[3] + d >>> 0;
+    H[4] = H[4] + e >>> 0;
+  }
+  return [H[0] >> 24 & 0xff, H[0] >> 16 & 0xff, H[0] >> 8 & 0xff, H[0] & 0xff, H[1] >> 24 & 0xff, H[1] >> 16 & 0xff, H[1] >> 8 & 0xff, H[1] & 0xff, H[2] >> 24 & 0xff, H[2] >> 16 & 0xff, H[2] >> 8 & 0xff, H[2] & 0xff, H[3] >> 24 & 0xff, H[3] >> 16 & 0xff, H[3] >> 8 & 0xff, H[3] & 0xff, H[4] >> 24 & 0xff, H[4] >> 16 & 0xff, H[4] >> 8 & 0xff, H[4] & 0xff];
+}
+var _default = exports.default = sha1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/sha1.js b/mqtt-backend/node_modules/uuid/dist/sha1.js
new file mode 100644
index 0000000..3b9ded9
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/sha1.js
@@ -0,0 +1,17 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _nodeCrypto = _interopRequireDefault(require("node:crypto"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function sha1(bytes) {
+  if (Array.isArray(bytes)) {
+    bytes = Buffer.from(bytes);
+  } else if (typeof bytes === 'string') {
+    bytes = Buffer.from(bytes, 'utf8');
+  }
+  return _nodeCrypto.default.createHash('sha1').update(bytes).digest();
+}
+var _default = exports.default = sha1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/stringify.js b/mqtt-backend/node_modules/uuid/dist/stringify.js
new file mode 100644
index 0000000..2522dc9
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/stringify.js
@@ -0,0 +1,38 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+exports.unsafeStringify = unsafeStringify;
+var _validate = _interopRequireDefault(require("./validate.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/**
+ * Convert array of 16 byte values to UUID string format of the form:
+ * XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
+ */
+const byteToHex = [];
+for (let i = 0; i < 256; ++i) {
+  byteToHex.push((i + 0x100).toString(16).slice(1));
+}
+function unsafeStringify(arr, offset = 0) {
+  // Note: Be careful editing this code!  It's been tuned for performance
+  // and works in ways you may not expect. See https://github.com/uuidjs/uuid/pull/434
+  //
+  // Note to future-self: No, you can't remove the `toLowerCase()` call.
+  // REF: https://github.com/uuidjs/uuid/pull/677#issuecomment-1757351351
+  return (byteToHex[arr[offset + 0]] + byteToHex[arr[offset + 1]] + byteToHex[arr[offset + 2]] + byteToHex[arr[offset + 3]] + '-' + byteToHex[arr[offset + 4]] + byteToHex[arr[offset + 5]] + '-' + byteToHex[arr[offset + 6]] + byteToHex[arr[offset + 7]] + '-' + byteToHex[arr[offset + 8]] + byteToHex[arr[offset + 9]] + '-' + byteToHex[arr[offset + 10]] + byteToHex[arr[offset + 11]] + byteToHex[arr[offset + 12]] + byteToHex[arr[offset + 13]] + byteToHex[arr[offset + 14]] + byteToHex[arr[offset + 15]]).toLowerCase();
+}
+function stringify(arr, offset = 0) {
+  const uuid = unsafeStringify(arr, offset);
+  // Consistency check for valid UUID.  If this throws, it's likely due to one
+  // of the following:
+  // - One or more input array values don't map to a hex octet (leading to
+  // "undefined" in the uuid)
+  // - Invalid input values for the RFC `version` or `variant` fields
+  if (!(0, _validate.default)(uuid)) {
+    throw TypeError('Stringified UUID is invalid');
+  }
+  return uuid;
+}
+var _default = exports.default = stringify;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/uuid-bin.js b/mqtt-backend/node_modules/uuid/dist/uuid-bin.js
new file mode 100644
index 0000000..d039dfe
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/uuid-bin.js
@@ -0,0 +1,75 @@
+"use strict";
+
+var _assert = _interopRequireDefault(require("assert"));
+var _v = _interopRequireDefault(require("./v1.js"));
+var _v2 = _interopRequireDefault(require("./v3.js"));
+var _v3 = _interopRequireDefault(require("./v4.js"));
+var _v4 = _interopRequireDefault(require("./v5.js"));
+var _v5 = _interopRequireDefault(require("./v6.js"));
+var _v6 = _interopRequireDefault(require("./v7.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function usage() {
+  console.log('Usage:');
+  console.log('  uuid');
+  console.log('  uuid v1');
+  console.log('  uuid v3 <name> <namespace uuid>');
+  console.log('  uuid v4');
+  console.log('  uuid v5 <name> <namespace uuid>');
+  console.log('  uuid v6');
+  console.log('  uuid v7');
+  console.log('  uuid --help');
+  console.log('\nNote: <namespace uuid> may be "URL" or "DNS" to use the corresponding UUIDs defined by RFC9562');
+}
+const args = process.argv.slice(2);
+if (args.indexOf('--help') >= 0) {
+  usage();
+  process.exit(0);
+}
+const version = args.shift() || 'v4';
+switch (version) {
+  case 'v1':
+    console.log((0, _v.default)());
+    break;
+  case 'v3':
+    {
+      const name = args.shift();
+      let namespace = args.shift();
+      (0, _assert.default)(name != null, 'v3 name not specified');
+      (0, _assert.default)(namespace != null, 'v3 namespace not specified');
+      if (namespace === 'URL') {
+        namespace = _v2.default.URL;
+      }
+      if (namespace === 'DNS') {
+        namespace = _v2.default.DNS;
+      }
+      console.log((0, _v2.default)(name, namespace));
+      break;
+    }
+  case 'v4':
+    console.log((0, _v3.default)());
+    break;
+  case 'v5':
+    {
+      const name = args.shift();
+      let namespace = args.shift();
+      (0, _assert.default)(name != null, 'v5 name not specified');
+      (0, _assert.default)(namespace != null, 'v5 namespace not specified');
+      if (namespace === 'URL') {
+        namespace = _v4.default.URL;
+      }
+      if (namespace === 'DNS') {
+        namespace = _v4.default.DNS;
+      }
+      console.log((0, _v4.default)(name, namespace));
+      break;
+    }
+  case 'v6':
+    console.log((0, _v5.default)());
+    break;
+  case 'v7':
+    console.log((0, _v6.default)());
+    break;
+  default:
+    usage();
+    process.exit(1);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/v1.js b/mqtt-backend/node_modules/uuid/dist/v1.js
new file mode 100644
index 0000000..c6b9344
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/v1.js
@@ -0,0 +1,131 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _rng = _interopRequireDefault(require("./rng.js"));
+var _stringify = require("./stringify.js");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+// **`v1()` - Generate time-based UUID**
+//
+// Inspired by https://github.com/LiosK/UUID.js
+// and http://docs.python.org/library/uuid.html
+
+let _nodeId;
+let _clockseq;
+
+// Previous uuid creation time
+let _lastMSecs = 0;
+let _lastNSecs = 0;
+
+// See https://github.com/uuidjs/uuid for API details
+function v1(options, buf, offset) {
+  let i = buf && offset || 0;
+  const b = buf || new Array(16);
+  options = options || {};
+  let node = options.node;
+  let clockseq = options.clockseq;
+
+  // v1 only: Use cached `node` and `clockseq` values
+  if (!options._v6) {
+    if (!node) {
+      node = _nodeId;
+    }
+    if (clockseq == null) {
+      clockseq = _clockseq;
+    }
+  }
+
+  // Handle cases where we need entropy.  We do this lazily to minimize issues
+  // related to insufficient system entropy.  See #189
+  if (node == null || clockseq == null) {
+    const seedBytes = options.random || (options.rng || _rng.default)();
+
+    // Randomize node
+    if (node == null) {
+      node = [seedBytes[0], seedBytes[1], seedBytes[2], seedBytes[3], seedBytes[4], seedBytes[5]];
+
+      // v1 only: cache node value for reuse
+      if (!_nodeId && !options._v6) {
+        // per RFC4122 4.5: Set MAC multicast bit (v1 only)
+        node[0] |= 0x01; // Set multicast bit
+
+        _nodeId = node;
+      }
+    }
+
+    // Randomize clockseq
+    if (clockseq == null) {
+      // Per 4.2.2, randomize (14 bit) clockseq
+      clockseq = (seedBytes[6] << 8 | seedBytes[7]) & 0x3fff;
+      if (_clockseq === undefined && !options._v6) {
+        _clockseq = clockseq;
+      }
+    }
+  }
+
+  // v1 & v6 timestamps are 100 nano-second units since the Gregorian epoch,
+  // (1582-10-15 00:00).  JSNumbers aren't precise enough for this, so time is
+  // handled internally as 'msecs' (integer milliseconds) and 'nsecs'
+  // (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01 00:00.
+  let msecs = options.msecs !== undefined ? options.msecs : Date.now();
+
+  // Per 4.2.1.2, use count of uuid's generated during the current clock
+  // cycle to simulate higher resolution clock
+  let nsecs = options.nsecs !== undefined ? options.nsecs : _lastNSecs + 1;
+
+  // Time since last uuid creation (in msecs)
+  const dt = msecs - _lastMSecs + (nsecs - _lastNSecs) / 10000;
+
+  // Per 4.2.1.2, Bump clockseq on clock regression
+  if (dt < 0 && options.clockseq === undefined) {
+    clockseq = clockseq + 1 & 0x3fff;
+  }
+
+  // Reset nsecs if clock regresses (new clockseq) or we've moved onto a new
+  // time interval
+  if ((dt < 0 || msecs > _lastMSecs) && options.nsecs === undefined) {
+    nsecs = 0;
+  }
+
+  // Per 4.2.1.2 Throw error if too many uuids are requested
+  if (nsecs >= 10000) {
+    throw new Error("uuid.v1(): Can't create more than 10M uuids/sec");
+  }
+  _lastMSecs = msecs;
+  _lastNSecs = nsecs;
+  _clockseq = clockseq;
+
+  // Per 4.1.4 - Convert from unix epoch to Gregorian epoch
+  msecs += 12219292800000;
+
+  // `time_low`
+  const tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
+  b[i++] = tl >>> 24 & 0xff;
+  b[i++] = tl >>> 16 & 0xff;
+  b[i++] = tl >>> 8 & 0xff;
+  b[i++] = tl & 0xff;
+
+  // `time_mid`
+  const tmh = msecs / 0x100000000 * 10000 & 0xfffffff;
+  b[i++] = tmh >>> 8 & 0xff;
+  b[i++] = tmh & 0xff;
+
+  // `time_high_and_version`
+  b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
+  b[i++] = tmh >>> 16 & 0xff;
+
+  // `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
+  b[i++] = clockseq >>> 8 | 0x80;
+
+  // `clock_seq_low`
+  b[i++] = clockseq & 0xff;
+
+  // `node`
+  for (let n = 0; n < 6; ++n) {
+    b[i + n] = node[n];
+  }
+  return buf || (0, _stringify.unsafeStringify)(b);
+}
+var _default = exports.default = v1;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/v1ToV6.js b/mqtt-backend/node_modules/uuid/dist/v1ToV6.js
new file mode 100644
index 0000000..ce56373
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/v1ToV6.js
@@ -0,0 +1,26 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = v1ToV6;
+var _parse = _interopRequireDefault(require("./parse.js"));
+var _stringify = require("./stringify.js");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/**
+ * Convert a v1 UUID to a v6 UUID
+ *
+ * @param {string|Uint8Array} uuid - The v1 UUID to convert to v6
+ * @returns {string|Uint8Array} The v6 UUID as the same type as the `uuid` arg
+ * (string or Uint8Array)
+ */
+function v1ToV6(uuid) {
+  const v1Bytes = typeof uuid === 'string' ? (0, _parse.default)(uuid) : uuid;
+  const v6Bytes = _v1ToV6(v1Bytes);
+  return typeof uuid === 'string' ? (0, _stringify.unsafeStringify)(v6Bytes) : v6Bytes;
+}
+
+// Do the field transformation needed for v1 -> v6
+function _v1ToV6(v1Bytes, randomize = false) {
+  return Uint8Array.of((v1Bytes[6] & 0x0f) << 4 | v1Bytes[7] >> 4 & 0x0f, (v1Bytes[7] & 0x0f) << 4 | (v1Bytes[4] & 0xf0) >> 4, (v1Bytes[4] & 0x0f) << 4 | (v1Bytes[5] & 0xf0) >> 4, (v1Bytes[5] & 0x0f) << 4 | (v1Bytes[0] & 0xf0) >> 4, (v1Bytes[0] & 0x0f) << 4 | (v1Bytes[1] & 0xf0) >> 4, (v1Bytes[1] & 0x0f) << 4 | (v1Bytes[2] & 0xf0) >> 4, 0x60 | v1Bytes[2] & 0x0f, v1Bytes[3], v1Bytes[8], v1Bytes[9], v1Bytes[10], v1Bytes[11], v1Bytes[12], v1Bytes[13], v1Bytes[14], v1Bytes[15]);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/v3.js b/mqtt-backend/node_modules/uuid/dist/v3.js
new file mode 100644
index 0000000..a3eed7e
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/v3.js
@@ -0,0 +1,11 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _v = _interopRequireDefault(require("./v35.js"));
+var _md = _interopRequireDefault(require("./md5.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+const v3 = (0, _v.default)('v3', 0x30, _md.default);
+var _default = exports.default = v3;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/v35.js b/mqtt-backend/node_modules/uuid/dist/v35.js
new file mode 100644
index 0000000..f2e35ae
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/v35.js
@@ -0,0 +1,63 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.URL = exports.DNS = void 0;
+exports.default = v35;
+var _stringify = require("./stringify.js");
+var _parse = _interopRequireDefault(require("./parse.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function stringToBytes(str) {
+  str = unescape(encodeURIComponent(str)); // UTF8 escape
+
+  const bytes = [];
+  for (let i = 0; i < str.length; ++i) {
+    bytes.push(str.charCodeAt(i));
+  }
+  return bytes;
+}
+const DNS = exports.DNS = '6ba7b810-9dad-11d1-80b4-00c04fd430c8';
+const URL = exports.URL = '6ba7b811-9dad-11d1-80b4-00c04fd430c8';
+function v35(name, version, hashfunc) {
+  function generateUUID(value, namespace, buf, offset) {
+    var _namespace;
+    if (typeof value === 'string') {
+      value = stringToBytes(value);
+    }
+    if (typeof namespace === 'string') {
+      namespace = (0, _parse.default)(namespace);
+    }
+    if (((_namespace = namespace) === null || _namespace === void 0 ? void 0 : _namespace.length) !== 16) {
+      throw TypeError('Namespace must be array-like (16 iterable integer values, 0-255)');
+    }
+
+    // Compute hash of namespace and value, Per 4.3
+    // Future: Use spread syntax when supported on all platforms, e.g. `bytes =
+    // hashfunc([...namespace, ... value])`
+    let bytes = new Uint8Array(16 + value.length);
+    bytes.set(namespace);
+    bytes.set(value, namespace.length);
+    bytes = hashfunc(bytes);
+    bytes[6] = bytes[6] & 0x0f | version;
+    bytes[8] = bytes[8] & 0x3f | 0x80;
+    if (buf) {
+      offset = offset || 0;
+      for (let i = 0; i < 16; ++i) {
+        buf[offset + i] = bytes[i];
+      }
+      return buf;
+    }
+    return (0, _stringify.unsafeStringify)(bytes);
+  }
+
+  // Function#name is not settable on some platforms (#270)
+  try {
+    generateUUID.name = name;
+  } catch (err) {}
+
+  // For CommonJS default export support
+  generateUUID.DNS = DNS;
+  generateUUID.URL = URL;
+  return generateUUID;
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/v4.js b/mqtt-backend/node_modules/uuid/dist/v4.js
new file mode 100644
index 0000000..6f2744b
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/v4.js
@@ -0,0 +1,32 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _native = _interopRequireDefault(require("./native.js"));
+var _rng = _interopRequireDefault(require("./rng.js"));
+var _stringify = require("./stringify.js");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function v4(options, buf, offset) {
+  if (_native.default.randomUUID && !buf && !options) {
+    return _native.default.randomUUID();
+  }
+  options = options || {};
+  const rnds = options.random || (options.rng || _rng.default)();
+
+  // Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
+  rnds[6] = rnds[6] & 0x0f | 0x40;
+  rnds[8] = rnds[8] & 0x3f | 0x80;
+
+  // Copy bytes to buffer, if provided
+  if (buf) {
+    offset = offset || 0;
+    for (let i = 0; i < 16; ++i) {
+      buf[offset + i] = rnds[i];
+    }
+    return buf;
+  }
+  return (0, _stringify.unsafeStringify)(rnds);
+}
+var _default = exports.default = v4;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/v5.js b/mqtt-backend/node_modules/uuid/dist/v5.js
new file mode 100644
index 0000000..63063bb
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/v5.js
@@ -0,0 +1,11 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _v = _interopRequireDefault(require("./v35.js"));
+var _sha = _interopRequireDefault(require("./sha1.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+const v5 = (0, _v.default)('v5', 0x50, _sha.default);
+var _default = exports.default = v5;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/v6.js b/mqtt-backend/node_modules/uuid/dist/v6.js
new file mode 100644
index 0000000..627c6a7
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/v6.js
@@ -0,0 +1,38 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = v6;
+var _stringify = require("./stringify.js");
+var _v = _interopRequireDefault(require("./v1.js"));
+var _v1ToV = _interopRequireDefault(require("./v1ToV6.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/**
+ *
+ * @param {object} options
+ * @param {Uint8Array=} buf
+ * @param {number=} offset
+ * @returns
+ */
+function v6(options = {}, buf, offset = 0) {
+  // v6 is v1 with different field layout, so we start with a v1 UUID, albeit
+  // with slightly different behavior around how the clock_seq and node fields
+  // are randomized, which is why we call v1 with _v6: true.
+  let bytes = (0, _v.default)({
+    ...options,
+    _v6: true
+  }, new Uint8Array(16));
+
+  // Reorder the fields to v6 layout.
+  bytes = (0, _v1ToV.default)(bytes);
+
+  // Return as a byte array if requested
+  if (buf) {
+    for (let i = 0; i < 16; i++) {
+      buf[offset + i] = bytes[i];
+    }
+    return buf;
+  }
+  return (0, _stringify.unsafeStringify)(bytes);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/v6ToV1.js b/mqtt-backend/node_modules/uuid/dist/v6ToV1.js
new file mode 100644
index 0000000..a019861
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/v6ToV1.js
@@ -0,0 +1,26 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = v6ToV1;
+var _parse = _interopRequireDefault(require("./parse.js"));
+var _stringify = require("./stringify.js");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/**
+ * Convert a v6 UUID to a v1 UUID
+ *
+ * @param {string|Uint8Array} uuid - The v6 UUID to convert to v6
+ * @returns {string|Uint8Array} The v1 UUID as the same type as the `uuid` arg
+ * (string or Uint8Array)
+ */
+function v6ToV1(uuid) {
+  const v6Bytes = typeof uuid === 'string' ? (0, _parse.default)(uuid) : uuid;
+  const v1Bytes = _v6ToV1(v6Bytes);
+  return typeof uuid === 'string' ? (0, _stringify.unsafeStringify)(v1Bytes) : v1Bytes;
+}
+
+// Do the field transformation needed for v6 -> v1
+function _v6ToV1(v6Bytes) {
+  return Uint8Array.of((v6Bytes[3] & 0x0f) << 4 | v6Bytes[4] >> 4 & 0x0f, (v6Bytes[4] & 0x0f) << 4 | (v6Bytes[5] & 0xf0) >> 4, (v6Bytes[5] & 0x0f) << 4 | v6Bytes[6] & 0x0f, v6Bytes[7], (v6Bytes[1] & 0x0f) << 4 | (v6Bytes[2] & 0xf0) >> 4, (v6Bytes[2] & 0x0f) << 4 | (v6Bytes[3] & 0xf0) >> 4, 0x10 | (v6Bytes[0] & 0xf0) >> 4, (v6Bytes[0] & 0x0f) << 4 | (v6Bytes[1] & 0xf0) >> 4, v6Bytes[8], v6Bytes[9], v6Bytes[10], v6Bytes[11], v6Bytes[12], v6Bytes[13], v6Bytes[14], v6Bytes[15]);
+}
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/v7.js b/mqtt-backend/node_modules/uuid/dist/v7.js
new file mode 100644
index 0000000..85831e1
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/v7.js
@@ -0,0 +1,152 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _rng = _interopRequireDefault(require("./rng.js"));
+var _stringify = require("./stringify.js");
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+/**
+ * UUID V7 - Unix Epoch time-based UUID
+ *
+ * The IETF has published RFC9562, introducing 3 new UUID versions (6,7,8). This
+ * implementation of V7 is based on the accepted, though not yet approved,
+ * revisions.
+ *
+ * RFC 9562:https://www.rfc-editor.org/rfc/rfc9562.html Universally Unique
+ * IDentifiers (UUIDs)
+
+ *
+ * Sample V7 value:
+ * https://www.rfc-editor.org/rfc/rfc9562.html#name-example-of-a-uuidv7-value
+ *
+ * Monotonic Bit Layout: RFC rfc9562.6.2 Method 1, Dedicated Counter Bits ref:
+ *     https://www.rfc-editor.org/rfc/rfc9562.html#section-6.2-5.1
+ *
+ *   0                   1                   2                   3 0 1 2 3 4 5 6
+ *   7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |                          unix_ts_ms                           |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |          unix_ts_ms           |  ver  |        seq_hi         |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |var|               seq_low               |        rand         |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *  |                             rand                              |
+ *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ *
+ * seq is a 31 bit serialized counter; comprised of 12 bit seq_hi and 19 bit
+ * seq_low, and randomly initialized upon timestamp change. 31 bit counter size
+ * was selected as any bitwise operations in node are done as _signed_ 32 bit
+ * ints. we exclude the sign bit.
+ */
+
+let _seqLow = null;
+let _seqHigh = null;
+let _msecs = 0;
+function v7(options, buf, offset) {
+  options = options || {};
+
+  // initialize buffer and pointer
+  let i = buf && offset || 0;
+  const b = buf || new Uint8Array(16);
+
+  // rnds is Uint8Array(16) filled with random bytes
+  const rnds = options.random || (options.rng || _rng.default)();
+
+  // milliseconds since unix epoch, 1970-01-01 00:00
+  const msecs = options.msecs !== undefined ? options.msecs : Date.now();
+
+  // seq is user provided 31 bit counter
+  let seq = options.seq !== undefined ? options.seq : null;
+
+  // initialize local seq high/low parts
+  let seqHigh = _seqHigh;
+  let seqLow = _seqLow;
+
+  // check if clock has advanced and user has not provided msecs
+  if (msecs > _msecs && options.msecs === undefined) {
+    _msecs = msecs;
+
+    // unless user provided seq, reset seq parts
+    if (seq !== null) {
+      seqHigh = null;
+      seqLow = null;
+    }
+  }
+
+  // if we have a user provided seq
+  if (seq !== null) {
+    // trim provided seq to 31 bits of value, avoiding overflow
+    if (seq > 0x7fffffff) {
+      seq = 0x7fffffff;
+    }
+
+    // split provided seq into high/low parts
+    seqHigh = seq >>> 19 & 0xfff;
+    seqLow = seq & 0x7ffff;
+  }
+
+  // randomly initialize seq
+  if (seqHigh === null || seqLow === null) {
+    seqHigh = rnds[6] & 0x7f;
+    seqHigh = seqHigh << 8 | rnds[7];
+    seqLow = rnds[8] & 0x3f; // pad for var
+    seqLow = seqLow << 8 | rnds[9];
+    seqLow = seqLow << 5 | rnds[10] >>> 3;
+  }
+
+  // increment seq if within msecs window
+  if (msecs + 10000 > _msecs && seq === null) {
+    if (++seqLow > 0x7ffff) {
+      seqLow = 0;
+      if (++seqHigh > 0xfff) {
+        seqHigh = 0;
+
+        // increment internal _msecs. this allows us to continue incrementing
+        // while staying monotonic. Note, once we hit 10k milliseconds beyond system
+        // clock, we will reset breaking monotonicity (after (2^31)*10000 generations)
+        _msecs++;
+      }
+    }
+  } else {
+    // resetting; we have advanced more than
+    // 10k milliseconds beyond system clock
+    _msecs = msecs;
+  }
+  _seqHigh = seqHigh;
+  _seqLow = seqLow;
+
+  // [bytes 0-5] 48 bits of local timestamp
+  b[i++] = _msecs / 0x10000000000 & 0xff;
+  b[i++] = _msecs / 0x100000000 & 0xff;
+  b[i++] = _msecs / 0x1000000 & 0xff;
+  b[i++] = _msecs / 0x10000 & 0xff;
+  b[i++] = _msecs / 0x100 & 0xff;
+  b[i++] = _msecs & 0xff;
+
+  // [byte 6] - set 4 bits of version (7) with first 4 bits seq_hi
+  b[i++] = seqHigh >>> 4 & 0x0f | 0x70;
+
+  // [byte 7] remaining 8 bits of seq_hi
+  b[i++] = seqHigh & 0xff;
+
+  // [byte 8] - variant (2 bits), first 6 bits seq_low
+  b[i++] = seqLow >>> 13 & 0x3f | 0x80;
+
+  // [byte 9] 8 bits seq_low
+  b[i++] = seqLow >>> 5 & 0xff;
+
+  // [byte 10] remaining 5 bits seq_low, 3 bits random
+  b[i++] = seqLow << 3 & 0xff | rnds[10] & 0x07;
+
+  // [bytes 11-15] always random
+  b[i++] = rnds[11];
+  b[i++] = rnds[12];
+  b[i++] = rnds[13];
+  b[i++] = rnds[14];
+  b[i++] = rnds[15];
+  return buf || (0, _stringify.unsafeStringify)(b);
+}
+var _default = exports.default = v7;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/validate.js b/mqtt-backend/node_modules/uuid/dist/validate.js
new file mode 100644
index 0000000..d47181a
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/validate.js
@@ -0,0 +1,12 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _regex = _interopRequireDefault(require("./regex.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function validate(uuid) {
+  return typeof uuid === 'string' && _regex.default.test(uuid);
+}
+var _default = exports.default = validate;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/dist/version.js b/mqtt-backend/node_modules/uuid/dist/version.js
new file mode 100644
index 0000000..0c6bbdd
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/dist/version.js
@@ -0,0 +1,15 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _validate = _interopRequireDefault(require("./validate.js"));
+function _interopRequireDefault(e) { return e && e.__esModule ? e : { default: e }; }
+function version(uuid) {
+  if (!(0, _validate.default)(uuid)) {
+    throw TypeError('Invalid UUID');
+  }
+  return parseInt(uuid.slice(14, 15), 16);
+}
+var _default = exports.default = version;
\ No newline at end of file
diff --git a/mqtt-backend/node_modules/uuid/package.json b/mqtt-backend/node_modules/uuid/package.json
new file mode 100644
index 0000000..dea12c6
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/package.json
@@ -0,0 +1,142 @@
+{
+  "name": "uuid",
+  "version": "10.0.0",
+  "description": "RFC9562 UUIDs",
+  "funding": [
+    "https://github.com/sponsors/broofa",
+    "https://github.com/sponsors/ctavan"
+  ],
+  "commitlint": {
+    "extends": [
+      "@commitlint/config-conventional"
+    ]
+  },
+  "keywords": [
+    "uuid",
+    "guid",
+    "rfc4122",
+    "rfc9562"
+  ],
+  "license": "MIT",
+  "bin": {
+    "uuid": "dist/bin/uuid"
+  },
+  "sideEffects": false,
+  "main": "./dist/index.js",
+  "exports": {
+    ".": {
+      "node": {
+        "module": "./dist/esm-node/index.js",
+        "require": "./dist/index.js",
+        "import": "./wrapper.mjs"
+      },
+      "browser": {
+        "import": "./dist/esm-browser/index.js",
+        "require": "./dist/commonjs-browser/index.js"
+      },
+      "default": "./dist/esm-browser/index.js"
+    },
+    "./package.json": "./package.json"
+  },
+  "module": "./dist/esm-node/index.js",
+  "browser": {
+    "./dist/esm-node/index.js": "./dist/esm-browser/index.js",
+    "./dist/md5.js": "./dist/md5-browser.js",
+    "./dist/native.js": "./dist/native-browser.js",
+    "./dist/rng.js": "./dist/rng-browser.js",
+    "./dist/sha1.js": "./dist/sha1-browser.js"
+  },
+  "files": [
+    "CHANGELOG.md",
+    "CONTRIBUTING.md",
+    "LICENSE.md",
+    "README.md",
+    "dist",
+    "wrapper.mjs"
+  ],
+  "devDependencies": {
+    "@babel/cli": "7.24.6",
+    "@babel/core": "7.24.6",
+    "@babel/eslint-parser": "7.24.6",
+    "@babel/plugin-syntax-import-attributes": "7.24.6",
+    "@babel/preset-env": "7.24.6",
+    "@commitlint/cli": "19.3.0",
+    "@commitlint/config-conventional": "19.2.2",
+    "@wdio/browserstack-service": "7.16.10",
+    "@wdio/cli": "7.16.10",
+    "@wdio/jasmine-framework": "7.16.6",
+    "@wdio/local-runner": "7.16.10",
+    "@wdio/spec-reporter": "7.16.9",
+    "@wdio/static-server-service": "7.16.6",
+    "bundlewatch": "0.3.3",
+    "eslint": "9.4.0",
+    "eslint-plugin-prettier": "5.1.3",
+    "globals": "15.3.0",
+    "husky": "9.0.11",
+    "jest": "29.7.0",
+    "lint-staged": "15.2.5",
+    "neostandard": "0.5.1",
+    "npm-run-all": "4.1.5",
+    "optional-dev-dependency": "2.0.1",
+    "prettier": "3.3.0",
+    "random-seed": "0.3.0",
+    "runmd": "1.3.9",
+    "standard-version": "9.5.0"
+  },
+  "optionalDevDependencies": {
+    "@wdio/browserstack-service": "7.16.10",
+    "@wdio/cli": "7.16.10",
+    "@wdio/jasmine-framework": "7.16.6",
+    "@wdio/local-runner": "7.16.10",
+    "@wdio/spec-reporter": "7.16.9",
+    "@wdio/static-server-service": "7.16.6"
+  },
+  "scripts": {
+    "examples:browser:webpack:build": "cd examples/browser-webpack && npm install && npm run build",
+    "examples:browser:rollup:build": "cd examples/browser-rollup && npm install && npm run build",
+    "examples:node:commonjs:test": "cd examples/node-commonjs && npm install && npm test",
+    "examples:node:esmodules:test": "cd examples/node-esmodules && npm install && npm test",
+    "examples:node:jest:test": "cd examples/node-jest && npm install && npm test",
+    "prepare": "husky install",
+    "lint": "npm run eslint:check && npm run prettier:check",
+    "eslint:check": "eslint src/ test/ examples/ *.js",
+    "eslint:fix": "eslint --fix src/ test/ examples/ *.js",
+    "pretest": "npm run build",
+    "test": "BABEL_ENV=commonjsNode node --throw-deprecation node_modules/.bin/jest test/unit/",
+    "test:matching": "BABEL_ENV=commonjsNode node --throw-deprecation node_modules/.bin/jest test/unit/ -t",
+    "pretest:browser": "optional-dev-dependency && npm run build && npm-run-all --parallel examples:browser:**",
+    "test:browser": "wdio run ./wdio.conf.js",
+    "pretest:node": "npm run build",
+    "test:node": "npm-run-all --parallel examples:node:**",
+    "test:pack": "./scripts/testpack.sh",
+    "pretest:benchmark": "npm run build",
+    "test:benchmark": "cd examples/benchmark && HUSKY=0 npm install && npm test",
+    "prettier:check": "prettier --check .",
+    "prettier:fix": "prettier --write .",
+    "bundlewatch": "npm run pretest:browser && bundlewatch --config bundlewatch.config.json",
+    "md": "runmd --watch --output=README.md README_js.md",
+    "docs": "npm run build && npx runmd --output=README.md README_js.md",
+    "docs:diff": "npm run docs && git diff --quiet README.md",
+    "build": "./scripts/build.sh",
+    "prepack": "npm run build",
+    "release": "standard-version --no-verify"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/uuidjs/uuid.git"
+  },
+  "lint-staged": {
+    "*": [
+      "prettier --no-error-on-unmatched-pattern --write"
+    ],
+    "*.{js,jsx}": [
+      "eslint --no-error-on-unmatched-pattern --fix"
+    ]
+  },
+  "standard-version": {
+    "scripts": {
+      "postchangelog": "prettier --write CHANGELOG.md"
+    }
+  },
+  "packageManager": "npm@10.8.1+sha256.b8807aebb9656758e2872fa6e7c564b506aa2faa9297439a478d471d2fe32483"
+}
diff --git a/mqtt-backend/node_modules/uuid/wrapper.mjs b/mqtt-backend/node_modules/uuid/wrapper.mjs
new file mode 100644
index 0000000..fba64f6
--- /dev/null
+++ b/mqtt-backend/node_modules/uuid/wrapper.mjs
@@ -0,0 +1,15 @@
+import uuid from './dist/index.js';
+export const v1 = uuid.v1;
+export const v1ToV6 = uuid.v1ToV6;
+export const v3 = uuid.v3;
+export const v4 = uuid.v4;
+export const v5 = uuid.v5;
+export const v6 = uuid.v6;
+export const v6ToV1 = uuid.v6ToV1;
+export const v7 = uuid.v7;
+export const NIL = uuid.NIL;
+export const MAX = uuid.MAX;
+export const version = uuid.version;
+export const validate = uuid.validate;
+export const stringify = uuid.stringify;
+export const parse = uuid.parse;
diff --git a/mqtt-backend/node_modules/worker-factory/LICENSE b/mqtt-backend/node_modules/worker-factory/LICENSE
new file mode 100644
index 0000000..2f04624
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Christoph Guttandin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/worker-factory/README.md b/mqtt-backend/node_modules/worker-factory/README.md
new file mode 100644
index 0000000..d2ffaaf
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/README.md
@@ -0,0 +1,5 @@
+# worker-factory
+
+**A little factory function to create a JSON-RPC based Web Worker implementation.**
+
+[![version](https://img.shields.io/npm/v/worker-factory.svg?style=flat-square)](https://www.npmjs.com/package/worker-factory)
diff --git a/mqtt-backend/node_modules/worker-factory/package.json b/mqtt-backend/node_modules/worker-factory/package.json
new file mode 100644
index 0000000..61d8f7d
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/package.json
@@ -0,0 +1,70 @@
+{
+    "author": "Christoph Guttandin",
+    "bugs": {
+        "url": "https://github.com/chrisguttandin/worker-factory/issues"
+    },
+    "config": {
+        "commitizen": {
+            "path": "cz-conventional-changelog"
+        }
+    },
+    "dependencies": {
+        "@babel/runtime": "^7.29.2",
+        "fast-unique-numbers": "^9.0.27",
+        "tslib": "^2.8.1"
+    },
+    "description": "A little factory function to create a JSON-RPC based Web Worker implementation.",
+    "devDependencies": {
+        "@babel/core": "^7.29.0",
+        "@babel/plugin-external-helpers": "^7.27.1",
+        "@babel/plugin-transform-runtime": "^7.29.0",
+        "@babel/preset-env": "^7.29.2",
+        "@commitlint/cli": "^20.5.0",
+        "@commitlint/config-angular": "^20.5.0",
+        "@rollup/plugin-babel": "^7.0.0",
+        "@vitest/browser-webdriverio": "^4.1.0",
+        "commitizen": "^4.3.1",
+        "cz-conventional-changelog": "^3.3.0",
+        "eslint": "^8.57.0",
+        "eslint-config-holy-grail": "^61.0.11",
+        "husky": "^9.1.7",
+        "lint-staged": "^16.4.0",
+        "memory-fs": "^0.5.0",
+        "prettier": "^3.8.1",
+        "rimraf": "^6.1.3",
+        "rollup": "^4.59.0",
+        "tsconfig-holy-grail": "^15.0.3",
+        "tslint": "^6.1.3",
+        "tslint-config-holy-grail": "^56.0.7",
+        "typescript": "^5.9.3",
+        "vitest": "^4.1.0"
+    },
+    "files": [
+        "build/es2019/",
+        "build/es5/",
+        "src/"
+    ],
+    "homepage": "https://github.com/chrisguttandin/worker-factory",
+    "license": "MIT",
+    "main": "build/es5/bundle.js",
+    "module": "build/es2019/module.js",
+    "name": "worker-factory",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/chrisguttandin/worker-factory.git"
+    },
+    "scripts": {
+        "build": "rimraf build/* && tsc --project src/tsconfig.json && rollup --config config/rollup/bundle.mjs",
+        "lint": "npm run lint:config && npm run lint:src && npm run lint:test",
+        "lint:config": "eslint --config config/eslint/config.json --ext .cjs --ext .js --ext .mjs --report-unused-disable-directives config/",
+        "lint:src": "tslint --config config/tslint/src.json --project src/tsconfig.json src/*.ts src/**/*.ts",
+        "lint:test": "eslint --config config/eslint/test.json --ext .js --report-unused-disable-directives test/",
+        "prepare": "husky",
+        "prepublishOnly": "npm run build",
+        "test": "npm run lint && npm run build && npm run test:integration && npm run test:unit",
+        "test:integration": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"integration\" ]; then npx vitest --config config/vitest/integration.ts; fi",
+        "test:unit": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"unit\" ]; then npx vitest --config config/vitest/unit.ts; fi"
+    },
+    "types": "build/es2019/module.d.ts",
+    "version": "7.0.49"
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/helpers/create-message-handler.ts b/mqtt-backend/node_modules/worker-factory/src/helpers/create-message-handler.ts
new file mode 100644
index 0000000..36d89b6
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/helpers/create-message-handler.ts
@@ -0,0 +1,52 @@
+import { IBrokerEvent, IErrorNotification, IErrorResponse, IReceiver, IRequest, IWorkerDefinition } from '../interfaces';
+import { TMessageReceiverWithParams, TMessageReceiverWithoutParams, TWorkerImplementation } from '../types';
+import { renderMethodNotFoundError, renderMissingResponseError, renderUnexpectedResultError } from './error-renderers';
+
+export const createMessageHandler = <WorkerDefinition extends IWorkerDefinition>(
+    receiver: IReceiver,
+    workerImplementation: TWorkerImplementation<WorkerDefinition>
+) => {
+    return async ({ data: { id, method, params } }: IBrokerEvent<WorkerDefinition>) => {
+        const messageHandler = workerImplementation[method];
+
+        try {
+            if (messageHandler === undefined) {
+                throw renderMethodNotFoundError(method);
+            }
+
+            const response =
+                params === undefined
+                    ? (messageHandler as TMessageReceiverWithoutParams<WorkerDefinition[typeof method]['response']>)()
+                    : (
+                          messageHandler as TMessageReceiverWithParams<
+                              WorkerDefinition[typeof method]['params'],
+                              WorkerDefinition[typeof method]['response']
+                          >
+                      )(params);
+
+            if (response === undefined) {
+                throw renderMissingResponseError(method);
+            }
+
+            const synchronousResponse = response instanceof Promise ? await response : response;
+
+            if (id === null) {
+                if (synchronousResponse.result !== undefined) {
+                    throw renderUnexpectedResultError(method);
+                }
+            } else {
+                if (synchronousResponse.result === undefined) {
+                    throw renderUnexpectedResultError(method);
+                }
+
+                const { result, transferables = [] } = <IRequest['response']>synchronousResponse;
+
+                receiver.postMessage({ id, result }, transferables);
+            }
+        } catch (err) {
+            const { message, status = -32603 } = err;
+
+            receiver.postMessage(<IErrorNotification | IErrorResponse>{ error: { code: status, message }, id });
+        }
+    };
+};
diff --git a/mqtt-backend/node_modules/worker-factory/src/helpers/error-renderers.ts b/mqtt-backend/node_modules/worker-factory/src/helpers/error-renderers.ts
new file mode 100644
index 0000000..e15aba7
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/helpers/error-renderers.ts
@@ -0,0 +1,24 @@
+const JSON_RPC_ERROR_CODES = { INTERNAL_ERROR: -32603, INVALID_PARAMS: -32602, METHOD_NOT_FOUND: -32601 };
+
+const createErrorWithMessageAndStatus = (message: string, status: number) => Object.assign(new Error(message), { status });
+
+export const renderMethodNotFoundError = (method: string) =>
+    createErrorWithMessageAndStatus(`The requested method called "${method}" is not supported.`, JSON_RPC_ERROR_CODES.METHOD_NOT_FOUND);
+
+export const renderMissingResponseError = (method: string) =>
+    createErrorWithMessageAndStatus(
+        `The handler of the method called "${method}" returned no required result.`,
+        JSON_RPC_ERROR_CODES.INTERNAL_ERROR
+    );
+
+export const renderUnexpectedResultError = (method: string) =>
+    createErrorWithMessageAndStatus(
+        `The handler of the method called "${method}" returned an unexpected result.`,
+        JSON_RPC_ERROR_CODES.INTERNAL_ERROR
+    );
+
+export const renderUnknownPortIdError = (portId: number) =>
+    createErrorWithMessageAndStatus(
+        `The specified parameter called "portId" with the given value "${portId}" does not identify a port connected to this worker.`,
+        JSON_RPC_ERROR_CODES.INVALID_PARAMS
+    );
diff --git a/mqtt-backend/node_modules/worker-factory/src/helpers/extend-worker-implementation.ts b/mqtt-backend/node_modules/worker-factory/src/helpers/extend-worker-implementation.ts
new file mode 100644
index 0000000..1f8b9d5
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/helpers/extend-worker-implementation.ts
@@ -0,0 +1,52 @@
+import { generateUniqueNumber } from 'fast-unique-numbers';
+import { IDefaultWorkerDefinition, IReceiver, IWorkerDefinition } from '../interfaces';
+import { TDestroyWorkerFunction, TWorkerImplementation } from '../types';
+import { renderUnknownPortIdError } from './error-renderers';
+import { isSupportingTransferables } from './is-supporting-transferables';
+
+const DESTROY_WORKER_FUNCTIONS: Map<number, TDestroyWorkerFunction> = new Map();
+
+export const extendWorkerImplementation = <WorkerDefinition extends IWorkerDefinition>(
+    createWorker: (receiver: IReceiver, workerImplementation: TWorkerImplementation<WorkerDefinition>) => TDestroyWorkerFunction,
+    partialWorkerImplementation: TWorkerImplementation<WorkerDefinition>,
+    isSupportedFunction: () => boolean | Promise<boolean>
+): TWorkerImplementation<WorkerDefinition> & TWorkerImplementation<IDefaultWorkerDefinition> => ({
+    ...partialWorkerImplementation,
+    connect: ({ port }: { port: MessagePort }) => {
+        port.start();
+
+        const destroyWorker = createWorker(port, partialWorkerImplementation);
+        const portId = generateUniqueNumber(DESTROY_WORKER_FUNCTIONS);
+
+        DESTROY_WORKER_FUNCTIONS.set(portId, () => {
+            destroyWorker();
+            port.close();
+            DESTROY_WORKER_FUNCTIONS.delete(portId);
+        });
+
+        return { result: portId };
+    },
+    disconnect: ({ portId }: { portId: number }) => {
+        const destroyWorker = DESTROY_WORKER_FUNCTIONS.get(portId);
+
+        if (destroyWorker === undefined) {
+            throw renderUnknownPortIdError(portId);
+        }
+
+        destroyWorker();
+
+        return { result: null };
+    },
+    isSupported: async () => {
+        const isSelfSupported = await isSupportingTransferables();
+
+        if (isSelfSupported) {
+            const result = isSupportedFunction();
+            const synchronousResult = result instanceof Promise ? await result : result;
+
+            return { result: synchronousResult };
+        }
+
+        return { result: false };
+    }
+});
diff --git a/mqtt-backend/node_modules/worker-factory/src/helpers/is-supporting-transferables.ts b/mqtt-backend/node_modules/worker-factory/src/helpers/is-supporting-transferables.ts
new file mode 100644
index 0000000..b0db36c
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/helpers/is-supporting-transferables.ts
@@ -0,0 +1,10 @@
+// Bug #1: Safari does currently not support to use transferables.
+
+export const isSupportingTransferables = () =>
+    new Promise<boolean>((resolve) => {
+        const arrayBuffer = new ArrayBuffer(0);
+        const { port1, port2 } = new MessageChannel();
+
+        port1.onmessage = ({ data }) => resolve(data !== null);
+        port2.postMessage(arrayBuffer, [arrayBuffer]);
+    });
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/broker-event.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/broker-event.ts
new file mode 100644
index 0000000..e2e452a
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/broker-event.ts
@@ -0,0 +1,6 @@
+import { IBrokerMessage } from './broker-message';
+import { IWorkerDefinition } from './worker-definition';
+
+export interface IBrokerEvent<WorkerDefinition extends IWorkerDefinition> extends Event {
+    data: IBrokerMessage<WorkerDefinition>;
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/broker-message.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/broker-message.ts
new file mode 100644
index 0000000..8c58125
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/broker-message.ts
@@ -0,0 +1,9 @@
+import { IWorkerDefinition } from './worker-definition';
+
+export interface IBrokerMessage<WorkerDefinition extends IWorkerDefinition> {
+    id: null | number;
+
+    method: Extract<keyof WorkerDefinition, string>;
+
+    params: WorkerDefinition[Extract<keyof WorkerDefinition, string>]['params'];
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/default-worker-definition.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/default-worker-definition.ts
new file mode 100644
index 0000000..e0dec57
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/default-worker-definition.ts
@@ -0,0 +1,29 @@
+import { IWorkerDefinition } from './worker-definition';
+
+export interface IDefaultWorkerDefinition extends IWorkerDefinition {
+    connect: {
+        params: {
+            port: MessagePort;
+        };
+
+        response: {
+            result: number;
+        };
+    };
+
+    disconnect: {
+        params: {
+            portId: number;
+        };
+
+        response: {
+            result: null;
+        };
+    };
+
+    isSupported: {
+        response: {
+            result: boolean;
+        };
+    };
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/error-notification.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/error-notification.ts
new file mode 100644
index 0000000..3bb246e
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/error-notification.ts
@@ -0,0 +1,7 @@
+import { IError } from './error';
+
+export interface IErrorNotification {
+    error: IError;
+
+    id: null;
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/error-response.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/error-response.ts
new file mode 100644
index 0000000..8056b0b
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/error-response.ts
@@ -0,0 +1,7 @@
+import { IError } from './error';
+
+export interface IErrorResponse {
+    error: IError;
+
+    id: null;
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/error.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/error.ts
new file mode 100644
index 0000000..55b583f
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/error.ts
@@ -0,0 +1,5 @@
+export interface IError {
+    code: number;
+
+    message: string;
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/index.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/index.ts
new file mode 100644
index 0000000..d66e8f3
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/index.ts
@@ -0,0 +1,14 @@
+export * from './broker-event';
+export * from './broker-message';
+export * from './default-worker-definition';
+export * from './error';
+export * from './error-notification';
+export * from './error-response';
+export * from './notification';
+export * from './receiver';
+export * from './request';
+export * from './value-array';
+export * from './value-map';
+export * from './worker-definition';
+export * from './worker-error-message';
+export * from './worker-result-message';
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/notification.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/notification.ts
new file mode 100644
index 0000000..a88f833
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/notification.ts
@@ -0,0 +1,11 @@
+import { TValue } from '../types';
+
+export interface INotification {
+    params: TValue;
+
+    response: {
+        result: undefined;
+    };
+
+    transferables?: Transferable[];
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/receiver.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/receiver.ts
new file mode 100644
index 0000000..694f761
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/receiver.ts
@@ -0,0 +1,7 @@
+export interface IReceiver {
+    addEventListener: typeof addEventListener;
+
+    postMessage: typeof postMessage;
+
+    removeEventListener: typeof removeEventListener;
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/request.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/request.ts
new file mode 100644
index 0000000..a21c336
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/request.ts
@@ -0,0 +1,13 @@
+import { TValue } from '../types';
+
+export interface IRequest {
+    params?: TValue[] | { [key: string]: TValue };
+
+    response: {
+        result: TValue;
+
+        transferables?: Transferable[];
+    };
+
+    transferables?: Transferable[];
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/value-array.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/value-array.ts
new file mode 100644
index 0000000..e6bd62b
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/value-array.ts
@@ -0,0 +1,5 @@
+import { TValue } from '../types';
+
+export interface IValueArray extends Array<TValue> {
+    // tslint:disable-line:no-empty-interface
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/value-map.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/value-map.ts
new file mode 100644
index 0000000..09f54d5
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/value-map.ts
@@ -0,0 +1,5 @@
+import { TValue } from '../types';
+
+export interface IValueMap {
+    [key: string]: TValue;
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/worker-definition.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/worker-definition.ts
new file mode 100644
index 0000000..a594715
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/worker-definition.ts
@@ -0,0 +1,5 @@
+import { TMessage } from '../types';
+
+export interface IWorkerDefinition {
+    [method: string]: TMessage;
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/worker-error-message.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/worker-error-message.ts
new file mode 100644
index 0000000..71a9bb0
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/worker-error-message.ts
@@ -0,0 +1,7 @@
+import { IError } from './error';
+
+export interface IWorkerErrorMessage {
+    error: IError;
+
+    id: null | number;
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/interfaces/worker-result-message.ts b/mqtt-backend/node_modules/worker-factory/src/interfaces/worker-result-message.ts
new file mode 100644
index 0000000..a714265
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/interfaces/worker-result-message.ts
@@ -0,0 +1,7 @@
+import { TValue } from '../types';
+
+export interface IWorkerResultMessage {
+    id: null | number;
+
+    result: TValue;
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/module.ts b/mqtt-backend/node_modules/worker-factory/src/module.ts
new file mode 100644
index 0000000..4a5f71a
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/module.ts
@@ -0,0 +1,27 @@
+import { createMessageHandler } from './helpers/create-message-handler';
+import { extendWorkerImplementation } from './helpers/extend-worker-implementation';
+import { isSupportingTransferables } from './helpers/is-supporting-transferables';
+import { IReceiver, IWorkerDefinition } from './interfaces';
+import { TDestroyWorkerFunction, TWorkerImplementation } from './types';
+
+/*
+ * @todo Explicitly referencing the barrel file seems to be necessary when enabling the
+ * isolatedModules compiler option.
+ */
+export * from './interfaces/index';
+export * from './types/index';
+
+export const createWorker = <WorkerDefinition extends IWorkerDefinition>(
+    receiver: IReceiver,
+    workerImplementation: TWorkerImplementation<WorkerDefinition>,
+    isSupportedFunction: () => boolean | Promise<boolean> = () => true
+): TDestroyWorkerFunction => {
+    const fullWorkerImplementation = extendWorkerImplementation<WorkerDefinition>(createWorker, workerImplementation, isSupportedFunction);
+    const messageHandler = createMessageHandler(receiver, fullWorkerImplementation);
+
+    receiver.addEventListener('message', messageHandler);
+
+    return () => receiver.removeEventListener('message', messageHandler);
+};
+
+export { isSupportingTransferables as isSupported };
diff --git a/mqtt-backend/node_modules/worker-factory/src/tsconfig.json b/mqtt-backend/node_modules/worker-factory/src/tsconfig.json
new file mode 100644
index 0000000..1dc2a50
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/tsconfig.json
@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "isolatedModules": true
+    },
+    "extends": "tsconfig-holy-grail/src/tsconfig-web-worker"
+}
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/destroy-worker-function.ts b/mqtt-backend/node_modules/worker-factory/src/types/destroy-worker-function.ts
new file mode 100644
index 0000000..780032d
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/destroy-worker-function.ts
@@ -0,0 +1 @@
+export type TDestroyWorkerFunction = () => void;
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/index.ts b/mqtt-backend/node_modules/worker-factory/src/types/index.ts
new file mode 100644
index 0000000..c22c2a5
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/index.ts
@@ -0,0 +1,11 @@
+export * from './destroy-worker-function';
+export * from './message';
+export * from './message-receiver';
+export * from './message-receiver-with-params';
+export * from './message-receiver-without-params';
+export * from './typed-array';
+export * from './value';
+export * from './value-map';
+export * from './worker-definition';
+export * from './worker-implementation';
+export * from './worker-message';
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/message-receiver-with-params.ts b/mqtt-backend/node_modules/worker-factory/src/types/message-receiver-with-params.ts
new file mode 100644
index 0000000..880275a
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/message-receiver-with-params.ts
@@ -0,0 +1,5 @@
+import { TMessage } from './message';
+
+export type TMessageReceiverWithParams<Params extends TMessage['params'], Response extends TMessage['response']> = (
+    params: Params
+) => Response | Promise<Response>;
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/message-receiver-without-params.ts b/mqtt-backend/node_modules/worker-factory/src/types/message-receiver-without-params.ts
new file mode 100644
index 0000000..ce15f37
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/message-receiver-without-params.ts
@@ -0,0 +1,3 @@
+import { TMessage } from './message';
+
+export type TMessageReceiverWithoutParams<Message extends TMessage['response']> = () => Message | Promise<Message>;
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/message-receiver.ts b/mqtt-backend/node_modules/worker-factory/src/types/message-receiver.ts
new file mode 100644
index 0000000..4400103
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/message-receiver.ts
@@ -0,0 +1,7 @@
+import { TMessage } from './message';
+import { TMessageReceiverWithParams } from './message-receiver-with-params';
+import { TMessageReceiverWithoutParams } from './message-receiver-without-params';
+
+export type TMessageReceiver<Message extends TMessage> = Message['params'] extends undefined
+    ? TMessageReceiverWithoutParams<Message['response']>
+    : TMessageReceiverWithParams<Message['params'], Message['response']>;
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/message.ts b/mqtt-backend/node_modules/worker-factory/src/types/message.ts
new file mode 100644
index 0000000..87b98ca
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/message.ts
@@ -0,0 +1,3 @@
+import { INotification, IRequest } from '../interfaces';
+
+export type TMessage = INotification | IRequest;
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/typed-array.ts b/mqtt-backend/node_modules/worker-factory/src/types/typed-array.ts
new file mode 100644
index 0000000..cf49f7a
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/typed-array.ts
@@ -0,0 +1,10 @@
+export type TTypedArray =
+    | Float32Array
+    | Float64Array
+    | Int8Array
+    | Int16Array
+    | Int32Array
+    | Uint8Array
+    | Uint8ClampedArray
+    | Uint16Array
+    | Uint32Array;
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/value-map.ts b/mqtt-backend/node_modules/worker-factory/src/types/value-map.ts
new file mode 100644
index 0000000..7929b86
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/value-map.ts
@@ -0,0 +1,5 @@
+import { IValueMap } from '../interfaces';
+
+export type TValueMap<ValueMap extends IValueMap = IValueMap> = {
+    [P in keyof ValueMap]: ValueMap[P];
+};
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/value.ts b/mqtt-backend/node_modules/worker-factory/src/types/value.ts
new file mode 100644
index 0000000..b42c92f
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/value.ts
@@ -0,0 +1,5 @@
+import { IValueArray } from '../interfaces';
+import { TTypedArray } from './typed-array';
+import { TValueMap } from './value-map';
+
+export type TValue = boolean | null | number | string | IValueArray | RegExp | TTypedArray | TValueMap | Transferable;
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/worker-definition.ts b/mqtt-backend/node_modules/worker-factory/src/types/worker-definition.ts
new file mode 100644
index 0000000..f6b1b9a
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/worker-definition.ts
@@ -0,0 +1,3 @@
+import { IDefaultWorkerDefinition, IWorkerDefinition } from '../interfaces';
+
+export type TWorkerDefinition<WorkerDefinition extends IWorkerDefinition> = WorkerDefinition & IDefaultWorkerDefinition;
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/worker-implementation.ts b/mqtt-backend/node_modules/worker-factory/src/types/worker-implementation.ts
new file mode 100644
index 0000000..66006ab
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/worker-implementation.ts
@@ -0,0 +1,6 @@
+import { IWorkerDefinition } from '../interfaces';
+import { TMessageReceiver } from './message-receiver';
+
+export type TWorkerImplementation<WorkerDefinition extends IWorkerDefinition> = {
+    [P in keyof WorkerDefinition]: TMessageReceiver<WorkerDefinition[P]>;
+};
diff --git a/mqtt-backend/node_modules/worker-factory/src/types/worker-message.ts b/mqtt-backend/node_modules/worker-factory/src/types/worker-message.ts
new file mode 100644
index 0000000..038cb99
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-factory/src/types/worker-message.ts
@@ -0,0 +1,3 @@
+import { IWorkerErrorMessage, IWorkerResultMessage } from '../interfaces';
+
+export type TWorkerMessage = IWorkerErrorMessage | IWorkerResultMessage;
diff --git a/mqtt-backend/node_modules/worker-timers-broker/LICENSE b/mqtt-backend/node_modules/worker-timers-broker/LICENSE
new file mode 100644
index 0000000..2f04624
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Christoph Guttandin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/worker-timers-broker/README.md b/mqtt-backend/node_modules/worker-timers-broker/README.md
new file mode 100644
index 0000000..c5fa023
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/README.md
@@ -0,0 +1,70 @@
+# worker-timers-broker
+
+**The broker which is used by the worker-timers package.**
+
+[![version](https://img.shields.io/npm/v/worker-timers-broker.svg?style=flat-square)](https://www.npmjs.com/package/worker-timers-broker)
+
+## Usage
+
+In most cases using this package via [`worker-timers`](https://github.com/chrisguttandin/worker-timers) is probably the most convenient choice.
+
+However `worker-timers-broker` is published as a separate package on npm. It can be installed using the following command:
+
+```shell
+npm install worker-timers-broker
+```
+
+The package exports two functions.
+
+### load()
+
+The `load()` function can be used to create a custom instance of `worker-timers` by explicitly specifying the URL which points to the code of the [`worker-timers-worker`](https://github.com/chrisguttandin/worker-timers-worker) package.
+
+```js
+import { load } from 'worker-timers-broker';
+
+const { clearInterval, clearTimeout, setInterval, setTimeout } = load('./the/worker-timers-worker/file');
+
+const intervalId = setInterval(() => {
+    // do something many times
+}, 100);
+
+clearInterval(intervalId);
+
+const timeoutId = setTimeout(() => {
+    // do something once
+}, 100);
+
+clearTimeout(timeoutId);
+```
+
+### wrap()
+
+The `wrap()` function can be used to wrap a Web Worker instance which already runs the code of the [`worker-timers-worker`](https://github.com/chrisguttandin/worker-timers-worker) package.
+
+In a project using [Vite](https://vite.dev) it can for example be used by leveraging [query suffixes](https://vite.dev/guide/features.html#import-with-query-suffixes).
+
+```js
+import { wrap } from 'worker-timers-broker';
+import createWorkerTimersWorker from 'worker-timers-worker?worker';
+
+const { clearInterval, clearTimeout, setInterval, setTimeout } = wrap(createWorkerTimersWorker());
+
+const intervalId = setInterval(() => {
+    // do something many times
+}, 100);
+
+clearInterval(intervalId);
+
+const timeoutId = setTimeout(() => {
+    // do something once
+}, 100);
+
+clearTimeout(timeoutId);
+```
+
+Please note the syntax for other build tools may vary.
+
+## Security contact information
+
+To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure.
diff --git a/mqtt-backend/node_modules/worker-timers-broker/package.json b/mqtt-backend/node_modules/worker-timers-broker/package.json
new file mode 100644
index 0000000..d6209ba
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/package.json
@@ -0,0 +1,73 @@
+{
+    "author": "Christoph Guttandin",
+    "bugs": {
+        "url": "https://github.com/chrisguttandin/worker-timers-broker/issues"
+    },
+    "config": {
+        "commitizen": {
+            "path": "cz-conventional-changelog"
+        }
+    },
+    "dependencies": {
+        "@babel/runtime": "^7.29.2",
+        "broker-factory": "^3.1.14",
+        "fast-unique-numbers": "^9.0.27",
+        "tslib": "^2.8.1",
+        "worker-timers-worker": "^9.0.14"
+    },
+    "description": "The broker which is used by the worker-timers package.",
+    "devDependencies": {
+        "@babel/core": "^7.29.0",
+        "@babel/plugin-external-helpers": "^7.27.1",
+        "@babel/plugin-transform-runtime": "^7.29.0",
+        "@babel/preset-env": "^7.29.2",
+        "@commitlint/cli": "^20.5.0",
+        "@commitlint/config-angular": "^20.5.0",
+        "@rollup/plugin-babel": "^7.0.0",
+        "@vitest/browser-webdriverio": "^4.0.18",
+        "chai": "^6.2.2",
+        "commitizen": "^4.3.1",
+        "cz-conventional-changelog": "^3.3.0",
+        "eslint": "^8.57.0",
+        "eslint-config-holy-grail": "^61.0.11",
+        "husky": "^9.1.7",
+        "lint-staged": "^16.4.0",
+        "prettier": "^3.8.1",
+        "rimraf": "^6.1.3",
+        "rollup": "^4.59.0",
+        "sinon": "^21.0.3",
+        "sinon-chai": "^4.0.1",
+        "tsconfig-holy-grail": "^15.0.3",
+        "tslint": "^6.1.3",
+        "tslint-config-holy-grail": "^56.0.7",
+        "typescript": "^5.9.3",
+        "vitest": "^4.0.18"
+    },
+    "files": [
+        "build/es2019/",
+        "build/es5/",
+        "src/"
+    ],
+    "homepage": "https://github.com/chrisguttandin/worker-timers-broker",
+    "license": "MIT",
+    "main": "build/es5/bundle.js",
+    "module": "build/es2019/module.js",
+    "name": "worker-timers-broker",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/chrisguttandin/worker-timers-broker.git"
+    },
+    "scripts": {
+        "build": "rimraf build/* && tsc --project src/tsconfig.json && rollup --config config/rollup/bundle.mjs",
+        "lint": "npm run lint:config && npm run lint:src && npm run lint:test",
+        "lint:config": "eslint --config config/eslint/config.json --ext .cjs --ext .js --ext .mjs --report-unused-disable-directives config/",
+        "lint:src": "tslint --config config/tslint/src.json --project src/tsconfig.json src/*.ts src/**/*.ts",
+        "lint:test": "eslint --config config/eslint/test.json --ext .js --report-unused-disable-directives test/",
+        "prepare": "husky",
+        "prepublishOnly": "npm run build",
+        "test": "npm run lint && npm run build && npm run test:unit",
+        "test:unit": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"unit\" ]; then npx vitest --config config/vitest/unit.ts; fi"
+    },
+    "types": "build/es2019/module.d.ts",
+    "version": "8.0.16"
+}
diff --git a/mqtt-backend/node_modules/worker-timers-broker/src/factories/clear-interval-factory.ts b/mqtt-backend/node_modules/worker-timers-broker/src/factories/clear-interval-factory.ts
new file mode 100644
index 0000000..0b65839
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/src/factories/clear-interval-factory.ts
@@ -0,0 +1,10 @@
+export const createClearIntervalFactory =
+    (scheduledIntervalsState: Map<number, null | symbol>) => (clear: (timerId: number) => Promise<boolean>) => (timerId: number) => {
+        if (typeof scheduledIntervalsState.get(timerId) === 'symbol') {
+            scheduledIntervalsState.set(timerId, null);
+
+            clear(timerId).then(() => {
+                scheduledIntervalsState.delete(timerId);
+            });
+        }
+    };
diff --git a/mqtt-backend/node_modules/worker-timers-broker/src/factories/clear-timeout-factory.ts b/mqtt-backend/node_modules/worker-timers-broker/src/factories/clear-timeout-factory.ts
new file mode 100644
index 0000000..855f808
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/src/factories/clear-timeout-factory.ts
@@ -0,0 +1,10 @@
+export const createClearTimeoutFactory =
+    (scheduledTimeoutsState: Map<number, null | symbol>) => (clear: (timerId: number) => Promise<boolean>) => (timerId: number) => {
+        if (typeof scheduledTimeoutsState.get(timerId) === 'symbol') {
+            scheduledTimeoutsState.set(timerId, null);
+
+            clear(timerId).then(() => {
+                scheduledTimeoutsState.delete(timerId);
+            });
+        }
+    };
diff --git a/mqtt-backend/node_modules/worker-timers-broker/src/factories/set-interval-factory.ts b/mqtt-backend/node_modules/worker-timers-broker/src/factories/set-interval-factory.ts
new file mode 100644
index 0000000..9a9c65d
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/src/factories/set-interval-factory.ts
@@ -0,0 +1,33 @@
+import type { generateUniqueNumber as generateUniqueNumberFunction } from 'fast-unique-numbers';
+
+export const createSetIntervalFactory =
+    (generateUniqueNumber: typeof generateUniqueNumberFunction, scheduledIntervalsState: Map<number, null | symbol>) =>
+    (set: (delay: number, timerId: number) => Promise<boolean>) =>
+    (func: Function, delay = 0, ...args: any[]) => {
+        const symbol = Symbol();
+        const timerId = generateUniqueNumber(scheduledIntervalsState);
+
+        scheduledIntervalsState.set(timerId, symbol);
+
+        const schedule = () =>
+            set(delay, timerId).then(() => {
+                const state = scheduledIntervalsState.get(timerId);
+
+                if (state === undefined) {
+                    throw new Error('The timer is in an undefined state.');
+                }
+
+                if (state === symbol) {
+                    func(...args);
+
+                    // Doublecheck if the interval should still be rescheduled because it could have been cleared inside of func().
+                    if (scheduledIntervalsState.get(timerId) === symbol) {
+                        schedule();
+                    }
+                }
+            });
+
+        schedule();
+
+        return timerId;
+    };
diff --git a/mqtt-backend/node_modules/worker-timers-broker/src/factories/set-timeout-factory.ts b/mqtt-backend/node_modules/worker-timers-broker/src/factories/set-timeout-factory.ts
new file mode 100644
index 0000000..e4c795d
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/src/factories/set-timeout-factory.ts
@@ -0,0 +1,28 @@
+import type { generateUniqueNumber as generateUniqueNumberFunction } from 'fast-unique-numbers';
+
+export const createSetTimeoutFactory =
+    (generateUniqueNumber: typeof generateUniqueNumberFunction, scheduledTimeoutsState: Map<number, null | symbol>) =>
+    (set: (delay: number, timerId: number) => Promise<boolean>) =>
+    (func: Function, delay = 0, ...args: any[]) => {
+        const symbol = Symbol();
+        const timerId = generateUniqueNumber(scheduledTimeoutsState);
+
+        scheduledTimeoutsState.set(timerId, symbol);
+
+        set(delay, timerId).then(() => {
+            const state = scheduledTimeoutsState.get(timerId);
+
+            if (state === undefined) {
+                throw new Error('The timer is in an undefined state.');
+            }
+
+            if (state === symbol) {
+                // A timeout can be savely deleted because it is only called once.
+                scheduledTimeoutsState.delete(timerId);
+
+                func(...args);
+            }
+        });
+
+        return timerId;
+    };
diff --git a/mqtt-backend/node_modules/worker-timers-broker/src/interfaces/index.ts b/mqtt-backend/node_modules/worker-timers-broker/src/interfaces/index.ts
new file mode 100644
index 0000000..e38acd9
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/src/interfaces/index.ts
@@ -0,0 +1 @@
+export * from './worker-timers-broker-definition';
diff --git a/mqtt-backend/node_modules/worker-timers-broker/src/interfaces/worker-timers-broker-definition.ts b/mqtt-backend/node_modules/worker-timers-broker/src/interfaces/worker-timers-broker-definition.ts
new file mode 100644
index 0000000..8478ab6
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/src/interfaces/worker-timers-broker-definition.ts
@@ -0,0 +1,11 @@
+import { IBrokerDefinition } from 'broker-factory';
+
+export interface IWorkerTimersBrokerDefinition extends IBrokerDefinition {
+    clearInterval(timerId: number): void;
+
+    clearTimeout(timerId: number): void;
+
+    setInterval(func: Function, delay?: number, ...args: any[]): number;
+
+    setTimeout(func: Function, delay?: number, ...args: any[]): number;
+}
diff --git a/mqtt-backend/node_modules/worker-timers-broker/src/module.ts b/mqtt-backend/node_modules/worker-timers-broker/src/module.ts
new file mode 100644
index 0000000..8d06586
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/src/module.ts
@@ -0,0 +1,44 @@
+import { createBroker } from 'broker-factory';
+import { generateUniqueNumber } from 'fast-unique-numbers';
+import { TWorkerTimersWorkerDefinition } from 'worker-timers-worker';
+import { createClearIntervalFactory } from './factories/clear-interval-factory';
+import { createClearTimeoutFactory } from './factories/clear-timeout-factory';
+import { createSetIntervalFactory } from './factories/set-interval-factory';
+import { createSetTimeoutFactory } from './factories/set-timeout-factory';
+import { IWorkerTimersBrokerDefinition } from './interfaces';
+import { TWorkerTimersBrokerLoader, TWorkerTimersBrokerWrapper } from './types';
+
+/*
+ * @todo Explicitly referencing the barrel file seems to be necessary when enabling the
+ * isolatedModules compiler option.
+ */
+export * from './interfaces/index';
+export * from './types/index';
+
+// Prefilling the Maps with a function indexed by zero is necessary to be compliant with the specification.
+const scheduledIntervalsState: Map<number, null | symbol> = new Map([[0, null]]); // tslint:disable-line no-empty
+const scheduledTimeoutsState: Map<number, null | symbol> = new Map([[0, null]]); // tslint:disable-line no-empty
+
+const createClearInterval = createClearIntervalFactory(scheduledIntervalsState);
+const createClearTimeout = createClearTimeoutFactory(scheduledTimeoutsState);
+const createSetInterval = createSetIntervalFactory(generateUniqueNumber, scheduledIntervalsState);
+const createSetTimeout = createSetTimeoutFactory(generateUniqueNumber, scheduledTimeoutsState);
+
+export const wrap: TWorkerTimersBrokerWrapper = createBroker<IWorkerTimersBrokerDefinition, TWorkerTimersWorkerDefinition>({
+    clearInterval: ({ call }) => createClearInterval((timerId) => call('clear', { timerId, timerType: 'interval' })),
+    clearTimeout: ({ call }) => createClearTimeout((timerId) => call('clear', { timerId, timerType: 'timeout' })),
+    setInterval: ({ call }) =>
+        createSetInterval((delay, timerId) =>
+            call('set', { delay, now: performance.timeOrigin + performance.now(), timerId, timerType: 'interval' })
+        ),
+    setTimeout: ({ call }) =>
+        createSetTimeout((delay, timerId) =>
+            call('set', { delay, now: performance.timeOrigin + performance.now(), timerId, timerType: 'timeout' })
+        )
+});
+
+export const load: TWorkerTimersBrokerLoader = (url: string) => {
+    const worker = new Worker(url);
+
+    return wrap(worker);
+};
diff --git a/mqtt-backend/node_modules/worker-timers-broker/src/tsconfig.json b/mqtt-backend/node_modules/worker-timers-broker/src/tsconfig.json
new file mode 100644
index 0000000..53941c6
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/src/tsconfig.json
@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "isolatedModules": true
+    },
+    "extends": "tsconfig-holy-grail/src/tsconfig-browser"
+}
diff --git a/mqtt-backend/node_modules/worker-timers-broker/src/types/index.ts b/mqtt-backend/node_modules/worker-timers-broker/src/types/index.ts
new file mode 100644
index 0000000..eb8822b
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/src/types/index.ts
@@ -0,0 +1,2 @@
+export * from './worker-timers-broker-loader';
+export * from './worker-timers-broker-wrapper';
diff --git a/mqtt-backend/node_modules/worker-timers-broker/src/types/worker-timers-broker-loader.ts b/mqtt-backend/node_modules/worker-timers-broker/src/types/worker-timers-broker-loader.ts
new file mode 100644
index 0000000..3d76d7a
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/src/types/worker-timers-broker-loader.ts
@@ -0,0 +1,4 @@
+import { IDefaultBrokerDefinition } from 'broker-factory';
+import { IWorkerTimersBrokerDefinition } from '../interfaces';
+
+export type TWorkerTimersBrokerLoader = (url: string) => IWorkerTimersBrokerDefinition & IDefaultBrokerDefinition;
diff --git a/mqtt-backend/node_modules/worker-timers-broker/src/types/worker-timers-broker-wrapper.ts b/mqtt-backend/node_modules/worker-timers-broker/src/types/worker-timers-broker-wrapper.ts
new file mode 100644
index 0000000..35a5f71
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-broker/src/types/worker-timers-broker-wrapper.ts
@@ -0,0 +1,4 @@
+import { IDefaultBrokerDefinition } from 'broker-factory';
+import { IWorkerTimersBrokerDefinition } from '../interfaces';
+
+export type TWorkerTimersBrokerWrapper = (sender: MessagePort | Worker) => IWorkerTimersBrokerDefinition & IDefaultBrokerDefinition;
diff --git a/mqtt-backend/node_modules/worker-timers-worker/LICENSE b/mqtt-backend/node_modules/worker-timers-worker/LICENSE
new file mode 100644
index 0000000..2f04624
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Christoph Guttandin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/worker-timers-worker/README.md b/mqtt-backend/node_modules/worker-timers-worker/README.md
new file mode 100644
index 0000000..d4caa26
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/README.md
@@ -0,0 +1,9 @@
+# worker-timers-worker
+
+**The worker which is used by the worker-timers package.**
+
+[![version](https://img.shields.io/npm/v/worker-timers-worker.svg?style=flat-square)](https://www.npmjs.com/package/worker-timers-worker)
+
+## Security contact information
+
+To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure.
diff --git a/mqtt-backend/node_modules/worker-timers-worker/package.json b/mqtt-backend/node_modules/worker-timers-worker/package.json
new file mode 100644
index 0000000..ac6df3a
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/package.json
@@ -0,0 +1,75 @@
+{
+    "author": "Christoph Guttandin",
+    "bugs": {
+        "url": "https://github.com/chrisguttandin/worker-timers-worker/issues"
+    },
+    "config": {
+        "commitizen": {
+            "path": "cz-conventional-changelog"
+        }
+    },
+    "contributors": [
+        {
+            "email": "vac872089248@gmail.com",
+            "name": "Knissing"
+        }
+    ],
+    "dependencies": {
+        "@babel/runtime": "^7.29.2",
+        "tslib": "^2.8.1",
+        "worker-factory": "^7.0.49"
+    },
+    "description": "The worker which is used by the worker-timers package.",
+    "devDependencies": {
+        "@babel/core": "^7.29.0",
+        "@babel/plugin-external-helpers": "^7.27.1",
+        "@babel/plugin-transform-runtime": "^7.29.0",
+        "@babel/preset-env": "^7.29.2",
+        "@commitlint/cli": "^20.5.0",
+        "@commitlint/config-angular": "^20.5.0",
+        "@rollup/plugin-babel": "^7.0.0",
+        "@vitest/browser-webdriverio": "^4.1.0",
+        "commitizen": "^4.3.1",
+        "cz-conventional-changelog": "^3.3.0",
+        "eslint": "^8.57.0",
+        "eslint-config-holy-grail": "^61.0.11",
+        "husky": "^9.1.7",
+        "lint-staged": "^16.4.0",
+        "prettier": "^3.8.1",
+        "rimraf": "^6.1.3",
+        "rollup": "^4.59.0",
+        "tsconfig-holy-grail": "^15.0.3",
+        "tslint": "^6.1.3",
+        "tslint-config-holy-grail": "^56.0.7",
+        "typescript": "^5.9.3",
+        "vitest": "^4.1.0"
+    },
+    "files": [
+        "build/es2019/",
+        "build/es5/",
+        "src/"
+    ],
+    "homepage": "https://github.com/chrisguttandin/worker-timers-worker",
+    "license": "MIT",
+    "main": "build/es5/bundle.js",
+    "module": "build/es2019/module.js",
+    "name": "worker-timers-worker",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/chrisguttandin/worker-timers-worker.git"
+    },
+    "scripts": {
+        "build": "rimraf build/* && tsc --project src/tsconfig.json && rollup --config config/rollup/bundle.mjs",
+        "lint": "npm run lint:config && npm run lint:src && npm run lint:test",
+        "lint:config": "eslint --config config/eslint/config.json --ext .cjs --ext .js --ext .mjs --report-unused-disable-directives config/",
+        "lint:src": "tslint --config config/tslint/src.json --project src/tsconfig.json src/*.ts src/**/*.ts",
+        "lint:test": "eslint --config config/eslint/test.json --ext .js --report-unused-disable-directives test/",
+        "prepare": "husky",
+        "prepublishOnly": "npm run build",
+        "test": "npm run lint && npm run build && npm run test:integration && npm run test:unit",
+        "test:integration": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"integration\" ]; then npx vitest --config config/vitest/integration.ts; fi",
+        "test:unit": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"unit\" ]; then npx vitest --config config/vitest/unit.ts; fi"
+    },
+    "types": "build/es2019/module.d.ts",
+    "version": "9.0.14"
+}
diff --git a/mqtt-backend/node_modules/worker-timers-worker/src/factories/clear-timer.ts b/mqtt-backend/node_modules/worker-timers-worker/src/factories/clear-timer.ts
new file mode 100644
index 0000000..5c71e61
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/src/factories/clear-timer.ts
@@ -0,0 +1,20 @@
+import { TResolveSetResponseResultPromise } from '../types';
+
+export const createClearTimer =
+    (clearTimeout: (typeof globalThis)['clearTimeout'], identifiersAndResolvers: Map<number, [number, TResolveSetResponseResultPromise]>) =>
+    (timerId: number) => {
+        const identifiersAndResolver = identifiersAndResolvers.get(timerId);
+
+        if (identifiersAndResolver === undefined) {
+            return Promise.resolve(false);
+        }
+
+        const [identifier, resolveSetResponseResultPromise] = identifiersAndResolver;
+
+        clearTimeout(identifier);
+        identifiersAndResolvers.delete(timerId);
+
+        resolveSetResponseResultPromise(false);
+
+        return Promise.resolve(true);
+    };
diff --git a/mqtt-backend/node_modules/worker-timers-worker/src/factories/set-timeout-callback.ts b/mqtt-backend/node_modules/worker-timers-worker/src/factories/set-timeout-callback.ts
new file mode 100644
index 0000000..f67830a
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/src/factories/set-timeout-callback.ts
@@ -0,0 +1,24 @@
+import { TResolveSetResponseResultPromise } from '../types';
+
+export const createSetTimeoutCallback = (performance: Pick<Performance, 'now'>, setTimeout: (typeof globalThis)['setTimeout']) => {
+    const setTimeoutCallback = (
+        expected: number,
+        identifiersAndResolvers: Map<number, [number, TResolveSetResponseResultPromise]>,
+        resolveSetResponseResultPromise: TResolveSetResponseResultPromise,
+        timerId: number
+    ) => {
+        const remainingDelay = expected - performance.now();
+
+        if (remainingDelay > 0) {
+            identifiersAndResolvers.set(timerId, [
+                setTimeout(setTimeoutCallback, remainingDelay, expected, identifiersAndResolvers, resolveSetResponseResultPromise, timerId),
+                resolveSetResponseResultPromise
+            ]);
+        } else {
+            identifiersAndResolvers.delete(timerId);
+            resolveSetResponseResultPromise(true);
+        }
+    };
+
+    return setTimeoutCallback;
+};
diff --git a/mqtt-backend/node_modules/worker-timers-worker/src/factories/set-timer.ts b/mqtt-backend/node_modules/worker-timers-worker/src/factories/set-timer.ts
new file mode 100644
index 0000000..9d92a42
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/src/factories/set-timer.ts
@@ -0,0 +1,21 @@
+import { TResolveSetResponseResultPromise } from '../types';
+import type { createSetTimeoutCallback } from './set-timeout-callback';
+
+export const createSetTimer =
+    (
+        identifiersAndResolvers: Map<number, [number, TResolveSetResponseResultPromise]>,
+        performance: Pick<Performance, 'now' | 'timeOrigin'>,
+        setTimeout: (typeof globalThis)['setTimeout'],
+        setTimeoutCallback: ReturnType<typeof createSetTimeoutCallback>
+    ) =>
+    (delay: number, nowAndTimeOrigin: number, timerId: number) => {
+        const expected = delay + nowAndTimeOrigin - performance.timeOrigin;
+        const remainingDelay = expected - performance.now();
+
+        return new Promise((resolve) => {
+            identifiersAndResolvers.set(timerId, [
+                setTimeout(setTimeoutCallback, remainingDelay, expected, identifiersAndResolvers, resolve, timerId),
+                resolve
+            ]);
+        });
+    };
diff --git a/mqtt-backend/node_modules/worker-timers-worker/src/interfaces/index.ts b/mqtt-backend/node_modules/worker-timers-worker/src/interfaces/index.ts
new file mode 100644
index 0000000..b98cadf
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/src/interfaces/index.ts
@@ -0,0 +1 @@
+export * from './worker-timers-worker-custom-definition';
diff --git a/mqtt-backend/node_modules/worker-timers-worker/src/interfaces/worker-timers-worker-custom-definition.ts b/mqtt-backend/node_modules/worker-timers-worker/src/interfaces/worker-timers-worker-custom-definition.ts
new file mode 100644
index 0000000..3a82cd1
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/src/interfaces/worker-timers-worker-custom-definition.ts
@@ -0,0 +1,32 @@
+import { IWorkerDefinition } from 'worker-factory';
+import { TTimerType } from '../types';
+
+export interface IWorkerTimersWorkerCustomDefinition extends IWorkerDefinition {
+    clear: {
+        params: {
+            timerId: number;
+
+            timerType: TTimerType;
+        };
+
+        response: {
+            result: boolean;
+        };
+    };
+
+    set: {
+        params: {
+            delay: number;
+
+            now: number;
+
+            timerId: number;
+
+            timerType: TTimerType;
+        };
+
+        response: {
+            result: boolean;
+        };
+    };
+}
diff --git a/mqtt-backend/node_modules/worker-timers-worker/src/module.ts b/mqtt-backend/node_modules/worker-timers-worker/src/module.ts
new file mode 100644
index 0000000..8b0800f
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/src/module.ts
@@ -0,0 +1,30 @@
+import { TWorkerImplementation, createWorker } from 'worker-factory';
+import { createClearTimer } from './factories/clear-timer';
+import { createSetTimeoutCallback } from './factories/set-timeout-callback';
+import { createSetTimer } from './factories/set-timer';
+import { IWorkerTimersWorkerCustomDefinition } from './interfaces';
+import { TResolveSetResponseResultPromise } from './types';
+
+/*
+ * @todo Explicitly referencing the barrel file seems to be necessary when enabling the
+ * isolatedModules compiler option.
+ */
+export * from './interfaces/index';
+export * from './types/index';
+
+const intervalIdentifiersAndResolvers: Map<number, [number, TResolveSetResponseResultPromise]> = new Map();
+const clearInterval = createClearTimer(globalThis.clearTimeout, intervalIdentifiersAndResolvers);
+const timeoutIdentifiersAndResolvers: Map<number, [number, TResolveSetResponseResultPromise]> = new Map();
+const clearTimeout = createClearTimer(globalThis.clearTimeout, timeoutIdentifiersAndResolvers);
+const setTimeoutCallback = createSetTimeoutCallback(performance, globalThis.setTimeout);
+const setInterval = createSetTimer(intervalIdentifiersAndResolvers, performance, globalThis.setTimeout, setTimeoutCallback);
+const setTimeout = createSetTimer(timeoutIdentifiersAndResolvers, performance, globalThis.setTimeout, setTimeoutCallback);
+
+createWorker<IWorkerTimersWorkerCustomDefinition>(self, <TWorkerImplementation<IWorkerTimersWorkerCustomDefinition>>{
+    clear: async ({ timerId, timerType }) => {
+        return { result: await (timerType === 'interval' ? clearInterval(timerId) : clearTimeout(timerId)) };
+    },
+    set: async ({ delay, now, timerId, timerType }) => {
+        return { result: await (timerType === 'interval' ? setInterval : setTimeout)(delay, now, timerId) };
+    }
+});
diff --git a/mqtt-backend/node_modules/worker-timers-worker/src/tsconfig.json b/mqtt-backend/node_modules/worker-timers-worker/src/tsconfig.json
new file mode 100644
index 0000000..1dc2a50
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/src/tsconfig.json
@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "isolatedModules": true
+    },
+    "extends": "tsconfig-holy-grail/src/tsconfig-web-worker"
+}
diff --git a/mqtt-backend/node_modules/worker-timers-worker/src/types/index.ts b/mqtt-backend/node_modules/worker-timers-worker/src/types/index.ts
new file mode 100644
index 0000000..5e25a15
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/src/types/index.ts
@@ -0,0 +1,3 @@
+export * from './resolve-set-response-result-promise';
+export * from './timer-type';
+export * from './worker-timers-worker-definition';
diff --git a/mqtt-backend/node_modules/worker-timers-worker/src/types/resolve-set-response-result-promise.ts b/mqtt-backend/node_modules/worker-timers-worker/src/types/resolve-set-response-result-promise.ts
new file mode 100644
index 0000000..ab447ff
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/src/types/resolve-set-response-result-promise.ts
@@ -0,0 +1,5 @@
+import { TWorkerTimersWorkerDefinition } from './worker-timers-worker-definition';
+
+export type TResolveSetResponseResultPromise = Parameters<
+    ConstructorParameters<typeof Promise<TWorkerTimersWorkerDefinition['set']['response']['result']>>[0]
+>[0];
diff --git a/mqtt-backend/node_modules/worker-timers-worker/src/types/timer-type.ts b/mqtt-backend/node_modules/worker-timers-worker/src/types/timer-type.ts
new file mode 100644
index 0000000..2a2c650
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/src/types/timer-type.ts
@@ -0,0 +1 @@
+export type TTimerType = 'interval' | 'timeout';
diff --git a/mqtt-backend/node_modules/worker-timers-worker/src/types/worker-timers-worker-definition.ts b/mqtt-backend/node_modules/worker-timers-worker/src/types/worker-timers-worker-definition.ts
new file mode 100644
index 0000000..dad7c18
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers-worker/src/types/worker-timers-worker-definition.ts
@@ -0,0 +1,4 @@
+import { TWorkerDefinition } from 'worker-factory';
+import { IWorkerTimersWorkerCustomDefinition } from '../interfaces';
+
+export type TWorkerTimersWorkerDefinition = TWorkerDefinition<IWorkerTimersWorkerCustomDefinition>;
diff --git a/mqtt-backend/node_modules/worker-timers/LICENSE b/mqtt-backend/node_modules/worker-timers/LICENSE
new file mode 100644
index 0000000..2f04624
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 Christoph Guttandin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/mqtt-backend/node_modules/worker-timers/README.md b/mqtt-backend/node_modules/worker-timers/README.md
new file mode 100644
index 0000000..489e9a7
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers/README.md
@@ -0,0 +1,71 @@
+![logo](https://repository-images.githubusercontent.com/24792198/dd93c980-323f-11ea-8a14-a0299de4847a)
+
+# worker-timers
+
+**A replacement for setInterval() and setTimeout() which works in unfocused windows.**
+
+[![version](https://img.shields.io/npm/v/worker-timers.svg?style=flat-square)](https://www.npmjs.com/package/worker-timers)
+
+## Motivation
+
+For scripts that rely on [WindowTimers](http://www.w3.org/TR/html5/webappapis.html#timers) like `setInterval()` or `setTimeout()` things get confusing when the site which the script is running on loses focus. Chrome, Firefox and maybe others throttle the frequency at which they invoke those timers to a maximum of once per second in such a situation. However this is only true for the main thread and does not affect the behavior of [Web Workers](http://www.w3.org/TR/workers/). Therefore it is possible to avoid the throttling by using a worker to do the actual scheduling. This is exactly what `worker-timers` does.
+
+## Getting Started
+
+`worker-timers` is available as a package on [npm](https://www.npmjs.org/package/worker-timers). Run the following command to install it:
+
+```shell
+npm install worker-timers
+```
+
+You can then import the exported functions in your code like this:
+
+```js
+import { clearInterval, clearTimeout, setInterval, setTimeout } from 'worker-timers';
+```
+
+The usage is exactly the same (despite of the [error handling](#error-handling) and the
+[differentiation between intervals and timeouts](#differentiation-between-intervals-and-timeouts))
+as with the corresponding functions on the global scope.
+
+```js
+const intervalId = setInterval(() => {
+    // do something many times
+}, 100);
+
+clearInterval(intervalId);
+
+const timeoutId = setTimeout(() => {
+    // do something once
+}, 100);
+
+clearTimeout(timeoutId);
+```
+
+## Differentiation between Intervals and Timeouts
+
+The native WindowTimers only maintain a single list of timers. But `worker-timers` maintains two separate lists to store the ids of intervals and timeouts internally. WindowTimers allows intervals to be cancelled by calling `clearTimeout()` and the other way round because it stores all timers in a single list. This is not possible with `worker-timers`.
+
+```js
+const periodicWork = () => {};
+
+// This will stop the interval.
+const windowId = window.setInterval(periodicWork, 100);
+window.clearTimeout(windowId);
+
+// This will not cancel the interval. It may cancel a timeout.
+const workerId = setInterval(periodicWork, 100);
+clearTimeout(workerId);
+```
+
+## Server-Side Rendering
+
+This package is intended to be used in the browser and requires the browser to have [support for Web Workers](https://caniuse.com/#feat=webworkers). It does not contain any fallback which would allow it to run in another environment like Node.js which doesn't know about Web Workers. This is to prevent this package from silently failing in an unsupported browser. But it also means that it needs to be replaced when used in a web project which also supports server-side rendering. The replacement should be straightforward, at least in theory, because each function has the exact same signature as its corresponding builtin function. But the configuration of a real-life project can be tricky. For a concrete example, please have a look at the [worker-timers-ssr-example](https://github.com/newyork-anthonyng/worker-timers-ssr-example) provided by [@newyork-anthonyng](https://github.com/newyork-anthonyng). It shows the usage inside of a server-side rendered React app.
+
+## Angular (& Zone.js)
+
+If `worker-timers` is used inside of an Angular app and Zone.js (which is the default) is used to detect changes, the behavior of `worker-timers` can be confusing. Angular is using Zone.js which is patching the native `setInterval()` and `setTimeout()` functions to get notified about the invocation of their callback functions. But Angular (more specifically Zone.js) is not aware of `worker-timers` and doesn't get notified about any callback invocations. Therefore Angular needs to be notified manually about state changes that occur inside of a callback function which was scheduled with the help of `worker-timers`.
+
+## Security contact information
+
+To report a security vulnerability, please use the [Tidelift security contact](https://tidelift.com/security). Tidelift will coordinate the fix and disclosure.
diff --git a/mqtt-backend/node_modules/worker-timers/package.json b/mqtt-backend/node_modules/worker-timers/package.json
new file mode 100644
index 0000000..ebf7f9d
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers/package.json
@@ -0,0 +1,93 @@
+{
+    "author": "Christoph Guttandin",
+    "bugs": {
+        "url": "https://github.com/chrisguttandin/worker-timers/issues"
+    },
+    "config": {
+        "commitizen": {
+            "path": "cz-conventional-changelog"
+        }
+    },
+    "contributors": [
+        {
+            "email": "a-anng@expedia.com",
+            "name": "Anthony Ng"
+        }
+    ],
+    "dependencies": {
+        "@babel/runtime": "^7.29.2",
+        "tslib": "^2.8.1",
+        "worker-timers-broker": "^8.0.16",
+        "worker-timers-worker": "^9.0.14"
+    },
+    "description": "A replacement for setInterval() and setTimeout() which works in unfocused windows.",
+    "devDependencies": {
+        "@babel/cli": "^7.28.6",
+        "@babel/core": "^7.29.0",
+        "@babel/plugin-external-helpers": "^7.27.1",
+        "@babel/plugin-transform-runtime": "^7.29.0",
+        "@babel/preset-env": "^7.29.2",
+        "@babel/register": "^7.28.6",
+        "@commitlint/cli": "^20.5.0",
+        "@commitlint/config-angular": "^20.5.0",
+        "@rollup/plugin-babel": "^7.0.0",
+        "@rollup/plugin-replace": "^6.0.3",
+        "@vitest/browser-webdriverio": "^4.0.18",
+        "babel-loader": "^10.1.1",
+        "commitizen": "^4.3.1",
+        "cz-conventional-changelog": "^3.3.0",
+        "eslint": "^8.57.0",
+        "eslint-config-holy-grail": "^61.0.11",
+        "husky": "^9.1.7",
+        "lint-staged": "^16.4.0",
+        "memfs": "^4.56.11",
+        "prettier": "^3.8.1",
+        "rimraf": "^6.1.3",
+        "rollup": "^4.59.0",
+        "terser-webpack-plugin": "^5.4.0",
+        "tsconfig-holy-grail": "^15.0.3",
+        "tslint": "^6.1.3",
+        "tslint-config-holy-grail": "^56.0.7",
+        "typescript": "^5.9.3",
+        "vitest": "^4.0.18",
+        "webpack": "^5.105.4",
+        "webpack-cli": "^6.0.1"
+    },
+    "files": [
+        "build/es2019/",
+        "build/es5/",
+        "src/"
+    ],
+    "homepage": "https://github.com/chrisguttandin/worker-timers",
+    "keywords": [
+        "Web Workers",
+        "WindowTimers",
+        "clearInterval",
+        "clearTimeout",
+        "interval",
+        "setInterval",
+        "setTimeout"
+    ],
+    "license": "MIT",
+    "main": "build/es5/bundle.js",
+    "module": "build/es2019/module.js",
+    "name": "worker-timers",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/chrisguttandin/worker-timers.git"
+    },
+    "scripts": {
+        "build": "rimraf build/* && webpack --config config/webpack/worker-es2019.js && tsc --project src/tsconfig.json && rollup --config config/rollup/bundle.mjs && babel ./build/es2019 --config-file ./config/babel/build.json --out-dir ./build/node",
+        "lint": "npm run lint:config && npm run lint:src && npm run lint:test",
+        "lint:config": "eslint --config config/eslint/config.json --ext .cjs --ext .js --ext .mjs --report-unused-disable-directives config/",
+        "lint:src": "tslint --config config/tslint/src.json --project src/tsconfig.json src/*.ts src/**/*.ts",
+        "lint:test": "eslint --config config/eslint/test.json --ext .js --report-unused-disable-directives test/",
+        "prepare": "husky",
+        "prepublishOnly": "npm run build",
+        "test": "npm run lint && npm run build && npm run test:integration-browser && npm run test:integration-node",
+        "test:integration-browser": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"integration\" ] && [ \"$TARGET\" = \"\" -o \"$TARGET\" = \"chrome\" -o \"$TARGET\" = \"firefox\" -o \"$TARGET\" = \"safari\" ]; then npx vitest --config config/vitest/integration.ts; fi",
+        "test:integration-node": "if [ \"$TYPE\" = \"\" -o \"$TYPE\" = \"integration\" ] && [ \"$TARGET\" = \"\" -o \"$TARGET\" = \"node\" ]; then npx vitest --browser.enabled false --config config/vitest/integration.ts; fi"
+    },
+    "types": "build/es2019/module.d.ts",
+    "version": "8.0.31"
+}
diff --git a/mqtt-backend/node_modules/worker-timers/src/factories/load-or-return-broker.ts b/mqtt-backend/node_modules/worker-timers/src/factories/load-or-return-broker.ts
new file mode 100644
index 0000000..8febb2b
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers/src/factories/load-or-return-broker.ts
@@ -0,0 +1,19 @@
+export const createLoadOrReturnBroker = <Broker>(loadBroker: (url: string) => Broker, worker: string) => {
+    let broker: null | Broker = null;
+
+    return () => {
+        if (broker !== null) {
+            return broker;
+        }
+
+        const blob = new Blob([worker], { type: 'application/javascript; charset=utf-8' });
+        const url = URL.createObjectURL(blob);
+
+        broker = loadBroker(url);
+
+        // Bug #1: Edge up until v18 didn't like the URL to be revoked directly.
+        setTimeout(() => URL.revokeObjectURL(url));
+
+        return broker;
+    };
+};
diff --git a/mqtt-backend/node_modules/worker-timers/src/module.ts b/mqtt-backend/node_modules/worker-timers/src/module.ts
new file mode 100644
index 0000000..2dd7c4e
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers/src/module.ts
@@ -0,0 +1,13 @@
+import { load } from 'worker-timers-broker';
+import { createLoadOrReturnBroker } from './factories/load-or-return-broker';
+import { worker } from './worker/worker';
+
+const loadOrReturnBroker = createLoadOrReturnBroker(load, worker);
+
+export const clearInterval: ReturnType<typeof load>['clearInterval'] = (timerId) => loadOrReturnBroker().clearInterval(timerId);
+
+export const clearTimeout: ReturnType<typeof load>['clearTimeout'] = (timerId) => loadOrReturnBroker().clearTimeout(timerId);
+
+export const setInterval: ReturnType<typeof load>['setInterval'] = (...args) => loadOrReturnBroker().setInterval(...args);
+
+export const setTimeout: ReturnType<typeof load>['setTimeout'] = (...args) => loadOrReturnBroker().setTimeout(...args);
diff --git a/mqtt-backend/node_modules/worker-timers/src/tsconfig.json b/mqtt-backend/node_modules/worker-timers/src/tsconfig.json
new file mode 100644
index 0000000..53941c6
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers/src/tsconfig.json
@@ -0,0 +1,6 @@
+{
+    "compilerOptions": {
+        "isolatedModules": true
+    },
+    "extends": "tsconfig-holy-grail/src/tsconfig-browser"
+}
diff --git a/mqtt-backend/node_modules/worker-timers/src/worker/worker.ts b/mqtt-backend/node_modules/worker-timers/src/worker/worker.ts
new file mode 100644
index 0000000..3599f36
--- /dev/null
+++ b/mqtt-backend/node_modules/worker-timers/src/worker/worker.ts
@@ -0,0 +1,2 @@
+// This is the minified and stringified code of the worker-timers-worker package.
+export const worker = `(()=>{var e={455(e,t){!function(e){"use strict";var t=function(e){return function(t){var r=e(t);return t.add(r),r}},r=function(e){return function(t,r){return e.set(t,r),r}},n=void 0===Number.MAX_SAFE_INTEGER?9007199254740991:Number.MAX_SAFE_INTEGER,o=536870912,s=2*o,a=function(e,t){return function(r){var a=t.get(r),i=void 0===a?r.size:a<s?a+1:0;if(!r.has(i))return e(r,i);if(r.size<o){for(;r.has(i);)i=Math.floor(Math.random()*s);return e(r,i)}if(r.size>n)throw new Error("Congratulations, you created a collection of unique numbers which uses all available integers!");for(;r.has(i);)i=Math.floor(Math.random()*n);return e(r,i)}},i=new WeakMap,u=r(i),c=a(u,i),l=t(c);e.addUniqueNumber=l,e.generateUniqueNumber=c}(t)}},t={};function r(n){var o=t[n];if(void 0!==o)return o.exports;var s=t[n]={exports:{}};return e[n].call(s.exports,s,s.exports,r),s.exports}(()=>{"use strict";const e=-32603,t=-32602,n=-32601,o=(e,t)=>Object.assign(new Error(e),{status:t}),s=t=>o('The handler of the method called "'.concat(t,'" returned an unexpected result.'),e),a=(t,r)=>async({data:{id:a,method:i,params:u}})=>{const c=r[i];try{if(void 0===c)throw(e=>o('The requested method called "'.concat(e,'" is not supported.'),n))(i);const r=void 0===u?c():c(u);if(void 0===r)throw(t=>o('The handler of the method called "'.concat(t,'" returned no required result.'),e))(i);const l=r instanceof Promise?await r:r;if(null===a){if(void 0!==l.result)throw s(i)}else{if(void 0===l.result)throw s(i);const{result:e,transferables:r=[]}=l;t.postMessage({id:a,result:e},r)}}catch(e){const{message:r,status:n=-32603}=e;t.postMessage({error:{code:n,message:r},id:a})}};var i=r(455);const u=new Map,c=(e,r,n)=>({...r,connect:({port:t})=>{t.start();const n=e(t,r),o=(0,i.generateUniqueNumber)(u);return u.set(o,()=>{n(),t.close(),u.delete(o)}),{result:o}},disconnect:({portId:e})=>{const r=u.get(e);if(void 0===r)throw(e=>o('The specified parameter called "portId" with the given value "'.concat(e,'" does not identify a port connected to this worker.'),t))(e);return r(),{result:null}},isSupported:async()=>{if(await new Promise(e=>{const t=new ArrayBuffer(0),{port1:r,port2:n}=new MessageChannel;r.onmessage=({data:t})=>e(null!==t),n.postMessage(t,[t])})){const e=n();return{result:e instanceof Promise?await e:e}}return{result:!1}}}),l=(e,t,r=()=>!0)=>{const n=c(l,t,r),o=a(e,n);return e.addEventListener("message",o),()=>e.removeEventListener("message",o)},d=(e,t)=>r=>{const n=t.get(r);if(void 0===n)return Promise.resolve(!1);const[o,s]=n;return e(o),t.delete(r),s(!1),Promise.resolve(!0)},m=(e,t,r,n)=>(o,s,a)=>{const i=o+s-t.timeOrigin,u=i-t.now();return new Promise(t=>{e.set(a,[r(n,u,i,e,t,a),t])})},f=new Map,h=d(globalThis.clearTimeout,f),p=new Map,v=d(globalThis.clearTimeout,p),w=((e,t)=>{const r=(n,o,s,a)=>{const i=n-e.now();i>0?o.set(a,[t(r,i,n,o,s,a),s]):(o.delete(a),s(!0))};return r})(performance,globalThis.setTimeout),g=m(f,performance,globalThis.setTimeout,w),T=m(p,performance,globalThis.setTimeout,w);l(self,{clear:async({timerId:e,timerType:t})=>({result:await("interval"===t?h(e):v(e))}),set:async({delay:e,now:t,timerId:r,timerType:n})=>({result:await("interval"===n?g:T)(e,t,r)})})})()})();`; // tslint:disable-line:max-line-length
diff --git a/mqtt-backend/node_modules/wrappy/LICENSE b/mqtt-backend/node_modules/wrappy/LICENSE
new file mode 100644
index 0000000..19129e3
--- /dev/null
+++ b/mqtt-backend/node_modules/wrappy/LICENSE
@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/mqtt-backend/node_modules/wrappy/README.md b/mqtt-backend/node_modules/wrappy/README.md
new file mode 100644
index 0000000..98eab25
--- /dev/null
+++ b/mqtt-backend/node_modules/wrappy/README.md
@@ -0,0 +1,36 @@
+# wrappy
+
+Callback wrapping utility
+
+## USAGE
+
+```javascript
+var wrappy = require("wrappy")
+
+// var wrapper = wrappy(wrapperFunction)
+
+// make sure a cb is called only once
+// See also: http://npm.im/once for this specific use case
+var once = wrappy(function (cb) {
+  var called = false
+  return function () {
+    if (called) return
+    called = true
+    return cb.apply(this, arguments)
+  }
+})
+
+function printBoo () {
+  console.log('boo')
+}
+// has some rando property
+printBoo.iAmBooPrinter = true
+
+var onlyPrintOnce = once(printBoo)
+
+onlyPrintOnce() // prints 'boo'
+onlyPrintOnce() // does nothing
+
+// random property is retained!
+assert.equal(onlyPrintOnce.iAmBooPrinter, true)
+```
diff --git a/mqtt-backend/node_modules/wrappy/package.json b/mqtt-backend/node_modules/wrappy/package.json
new file mode 100644
index 0000000..1307520
--- /dev/null
+++ b/mqtt-backend/node_modules/wrappy/package.json
@@ -0,0 +1,29 @@
+{
+  "name": "wrappy",
+  "version": "1.0.2",
+  "description": "Callback wrapping utility",
+  "main": "wrappy.js",
+  "files": [
+    "wrappy.js"
+  ],
+  "directories": {
+    "test": "test"
+  },
+  "dependencies": {},
+  "devDependencies": {
+    "tap": "^2.3.1"
+  },
+  "scripts": {
+    "test": "tap --coverage test/*.js"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/npm/wrappy"
+  },
+  "author": "Isaac Z. Schlueter <i@izs.me> (http://blog.izs.me/)",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/npm/wrappy/issues"
+  },
+  "homepage": "https://github.com/npm/wrappy"
+}
diff --git a/mqtt-backend/node_modules/wrappy/wrappy.js b/mqtt-backend/node_modules/wrappy/wrappy.js
new file mode 100644
index 0000000..bb7e7d6
--- /dev/null
+++ b/mqtt-backend/node_modules/wrappy/wrappy.js
@@ -0,0 +1,33 @@
+// Returns a wrapper function that returns a wrapped callback
+// The wrapper function should do some stuff, and return a
+// presumably different callback function.
+// This makes sure that own properties are retained, so that
+// decorations and such are not lost along the way.
+module.exports = wrappy
+function wrappy (fn, cb) {
+  if (fn && cb) return wrappy(fn)(cb)
+
+  if (typeof fn !== 'function')
+    throw new TypeError('need wrapper function')
+
+  Object.keys(fn).forEach(function (k) {
+    wrapper[k] = fn[k]
+  })
+
+  return wrapper
+
+  function wrapper() {
+    var args = new Array(arguments.length)
+    for (var i = 0; i < args.length; i++) {
+      args[i] = arguments[i]
+    }
+    var ret = fn.apply(this, args)
+    var cb = args[args.length-1]
+    if (typeof ret === 'function' && ret !== cb) {
+      Object.keys(cb).forEach(function (k) {
+        ret[k] = cb[k]
+      })
+    }
+    return ret
+  }
+}
diff --git a/mqtt-backend/node_modules/ws/LICENSE b/mqtt-backend/node_modules/ws/LICENSE
new file mode 100644
index 0000000..1da5b96
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2011 Einar Otto Stangvik <einaros@gmail.com>
+Copyright (c) 2013 Arnout Kazemier and contributors
+Copyright (c) 2016 Luigi Pinca and contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/ws/README.md b/mqtt-backend/node_modules/ws/README.md
new file mode 100644
index 0000000..21f10df
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/README.md
@@ -0,0 +1,548 @@
+# ws: a Node.js WebSocket library
+
+[![Version npm](https://img.shields.io/npm/v/ws.svg?logo=npm)](https://www.npmjs.com/package/ws)
+[![CI](https://img.shields.io/github/actions/workflow/status/websockets/ws/ci.yml?branch=master&label=CI&logo=github)](https://github.com/websockets/ws/actions?query=workflow%3ACI+branch%3Amaster)
+[![Coverage Status](https://img.shields.io/coveralls/websockets/ws/master.svg?logo=coveralls)](https://coveralls.io/github/websockets/ws)
+
+ws is a simple to use, blazing fast, and thoroughly tested WebSocket client and
+server implementation.
+
+Passes the quite extensive Autobahn test suite: [server][server-report],
+[client][client-report].
+
+**Note**: This module does not work in the browser. The client in the docs is a
+reference to a backend with the role of a client in the WebSocket communication.
+Browser clients must use the native
+[`WebSocket`](https://developer.mozilla.org/en-US/docs/Web/API/WebSocket)
+object. To make the same code work seamlessly on Node.js and the browser, you
+can use one of the many wrappers available on npm, like
+[isomorphic-ws](https://github.com/heineiuo/isomorphic-ws).
+
+## Table of Contents
+
+- [Protocol support](#protocol-support)
+- [Installing](#installing)
+  - [Opt-in for performance](#opt-in-for-performance)
+    - [Legacy opt-in for performance](#legacy-opt-in-for-performance)
+- [API docs](#api-docs)
+- [WebSocket compression](#websocket-compression)
+- [Usage examples](#usage-examples)
+  - [Sending and receiving text data](#sending-and-receiving-text-data)
+  - [Sending binary data](#sending-binary-data)
+  - [Simple server](#simple-server)
+  - [External HTTP/S server](#external-https-server)
+  - [Multiple servers sharing a single HTTP/S server](#multiple-servers-sharing-a-single-https-server)
+  - [Client authentication](#client-authentication)
+  - [Server broadcast](#server-broadcast)
+  - [Round-trip time](#round-trip-time)
+  - [Use the Node.js streams API](#use-the-nodejs-streams-api)
+  - [Other examples](#other-examples)
+- [FAQ](#faq)
+  - [How to get the IP address of the client?](#how-to-get-the-ip-address-of-the-client)
+  - [How to detect and close broken connections?](#how-to-detect-and-close-broken-connections)
+  - [How to connect via a proxy?](#how-to-connect-via-a-proxy)
+- [Changelog](#changelog)
+- [License](#license)
+
+## Protocol support
+
+- **HyBi drafts 07-12** (Use the option `protocolVersion: 8`)
+- **HyBi drafts 13-17** (Current default, alternatively option
+  `protocolVersion: 13`)
+
+## Installing
+
+```
+npm install ws
+```
+
+### Opt-in for performance
+
+[bufferutil][] is an optional module that can be installed alongside the ws
+module:
+
+```
+npm install --save-optional bufferutil
+```
+
+This is a binary addon that improves the performance of certain operations such
+as masking and unmasking the data payload of the WebSocket frames. Prebuilt
+binaries are available for the most popular platforms, so you don't necessarily
+need to have a C++ compiler installed on your machine.
+
+To force ws to not use bufferutil, use the
+[`WS_NO_BUFFER_UTIL`](./doc/ws.md#ws_no_buffer_util) environment variable. This
+can be useful to enhance security in systems where a user can put a package in
+the package search path of an application of another user, due to how the
+Node.js resolver algorithm works.
+
+#### Legacy opt-in for performance
+
+If you are running on an old version of Node.js (prior to v18.14.0), ws also
+supports the [utf-8-validate][] module:
+
+```
+npm install --save-optional utf-8-validate
+```
+
+This contains a binary polyfill for [`buffer.isUtf8()`][].
+
+To force ws not to use utf-8-validate, use the
+[`WS_NO_UTF_8_VALIDATE`](./doc/ws.md#ws_no_utf_8_validate) environment variable.
+
+## API docs
+
+See [`/doc/ws.md`](./doc/ws.md) for Node.js-like documentation of ws classes and
+utility functions.
+
+## WebSocket compression
+
+ws supports the [permessage-deflate extension][permessage-deflate] which enables
+the client and server to negotiate a compression algorithm and its parameters,
+and then selectively apply it to the data payloads of each WebSocket message.
+
+The extension is disabled by default on the server and enabled by default on the
+client. It adds a significant overhead in terms of performance and memory
+consumption so we suggest to enable it only if it is really needed.
+
+Note that Node.js has a variety of issues with high-performance compression,
+where increased concurrency, especially on Linux, can lead to [catastrophic
+memory fragmentation][node-zlib-bug] and slow performance. If you intend to use
+permessage-deflate in production, it is worthwhile to set up a test
+representative of your workload and ensure Node.js/zlib will handle it with
+acceptable performance and memory usage.
+
+Tuning of permessage-deflate can be done via the options defined below. You can
+also use `zlibDeflateOptions` and `zlibInflateOptions`, which is passed directly
+into the creation of [raw deflate/inflate streams][node-zlib-deflaterawdocs].
+
+See [the docs][ws-server-options] for more options.
+
+```js
+import WebSocket, { WebSocketServer } from 'ws';
+
+const wss = new WebSocketServer({
+  port: 8080,
+  perMessageDeflate: {
+    zlibDeflateOptions: {
+      // See zlib defaults.
+      chunkSize: 1024,
+      memLevel: 7,
+      level: 3
+    },
+    zlibInflateOptions: {
+      chunkSize: 10 * 1024
+    },
+    // Other options settable:
+    clientNoContextTakeover: true, // Defaults to negotiated value.
+    serverNoContextTakeover: true, // Defaults to negotiated value.
+    serverMaxWindowBits: 10, // Defaults to negotiated value.
+    // Below options specified as default values.
+    concurrencyLimit: 10, // Limits zlib concurrency for perf.
+    threshold: 1024 // Size (in bytes) below which messages
+    // should not be compressed if context takeover is disabled.
+  }
+});
+```
+
+The client will only use the extension if it is supported and enabled on the
+server. To always disable the extension on the client, set the
+`perMessageDeflate` option to `false`.
+
+```js
+import WebSocket from 'ws';
+
+const ws = new WebSocket('ws://www.host.com/path', {
+  perMessageDeflate: false
+});
+```
+
+## Usage examples
+
+### Sending and receiving text data
+
+```js
+import WebSocket from 'ws';
+
+const ws = new WebSocket('ws://www.host.com/path');
+
+ws.on('error', console.error);
+
+ws.on('open', function open() {
+  ws.send('something');
+});
+
+ws.on('message', function message(data) {
+  console.log('received: %s', data);
+});
+```
+
+### Sending binary data
+
+```js
+import WebSocket from 'ws';
+
+const ws = new WebSocket('ws://www.host.com/path');
+
+ws.on('error', console.error);
+
+ws.on('open', function open() {
+  const array = new Float32Array(5);
+
+  for (var i = 0; i < array.length; ++i) {
+    array[i] = i / 2;
+  }
+
+  ws.send(array);
+});
+```
+
+### Simple server
+
+```js
+import { WebSocketServer } from 'ws';
+
+const wss = new WebSocketServer({ port: 8080 });
+
+wss.on('connection', function connection(ws) {
+  ws.on('error', console.error);
+
+  ws.on('message', function message(data) {
+    console.log('received: %s', data);
+  });
+
+  ws.send('something');
+});
+```
+
+### External HTTP/S server
+
+```js
+import { createServer } from 'https';
+import { readFileSync } from 'fs';
+import { WebSocketServer } from 'ws';
+
+const server = createServer({
+  cert: readFileSync('/path/to/cert.pem'),
+  key: readFileSync('/path/to/key.pem')
+});
+const wss = new WebSocketServer({ server });
+
+wss.on('connection', function connection(ws) {
+  ws.on('error', console.error);
+
+  ws.on('message', function message(data) {
+    console.log('received: %s', data);
+  });
+
+  ws.send('something');
+});
+
+server.listen(8080);
+```
+
+### Multiple servers sharing a single HTTP/S server
+
+```js
+import { createServer } from 'http';
+import { WebSocketServer } from 'ws';
+
+const server = createServer();
+const wss1 = new WebSocketServer({ noServer: true });
+const wss2 = new WebSocketServer({ noServer: true });
+
+wss1.on('connection', function connection(ws) {
+  ws.on('error', console.error);
+
+  // ...
+});
+
+wss2.on('connection', function connection(ws) {
+  ws.on('error', console.error);
+
+  // ...
+});
+
+server.on('upgrade', function upgrade(request, socket, head) {
+  const { pathname } = new URL(request.url, 'wss://base.url');
+
+  if (pathname === '/foo') {
+    wss1.handleUpgrade(request, socket, head, function done(ws) {
+      wss1.emit('connection', ws, request);
+    });
+  } else if (pathname === '/bar') {
+    wss2.handleUpgrade(request, socket, head, function done(ws) {
+      wss2.emit('connection', ws, request);
+    });
+  } else {
+    socket.destroy();
+  }
+});
+
+server.listen(8080);
+```
+
+### Client authentication
+
+```js
+import { createServer } from 'http';
+import { WebSocketServer } from 'ws';
+
+function onSocketError(err) {
+  console.error(err);
+}
+
+const server = createServer();
+const wss = new WebSocketServer({ noServer: true });
+
+wss.on('connection', function connection(ws, request, client) {
+  ws.on('error', console.error);
+
+  ws.on('message', function message(data) {
+    console.log(`Received message ${data} from user ${client}`);
+  });
+});
+
+server.on('upgrade', function upgrade(request, socket, head) {
+  socket.on('error', onSocketError);
+
+  // This function is not defined on purpose. Implement it with your own logic.
+  authenticate(request, function next(err, client) {
+    if (err || !client) {
+      socket.write('HTTP/1.1 401 Unauthorized\r\n\r\n');
+      socket.destroy();
+      return;
+    }
+
+    socket.removeListener('error', onSocketError);
+
+    wss.handleUpgrade(request, socket, head, function done(ws) {
+      wss.emit('connection', ws, request, client);
+    });
+  });
+});
+
+server.listen(8080);
+```
+
+Also see the provided [example][session-parse-example] using `express-session`.
+
+### Server broadcast
+
+A client WebSocket broadcasting to all connected WebSocket clients, including
+itself.
+
+```js
+import WebSocket, { WebSocketServer } from 'ws';
+
+const wss = new WebSocketServer({ port: 8080 });
+
+wss.on('connection', function connection(ws) {
+  ws.on('error', console.error);
+
+  ws.on('message', function message(data, isBinary) {
+    wss.clients.forEach(function each(client) {
+      if (client.readyState === WebSocket.OPEN) {
+        client.send(data, { binary: isBinary });
+      }
+    });
+  });
+});
+```
+
+A client WebSocket broadcasting to every other connected WebSocket clients,
+excluding itself.
+
+```js
+import WebSocket, { WebSocketServer } from 'ws';
+
+const wss = new WebSocketServer({ port: 8080 });
+
+wss.on('connection', function connection(ws) {
+  ws.on('error', console.error);
+
+  ws.on('message', function message(data, isBinary) {
+    wss.clients.forEach(function each(client) {
+      if (client !== ws && client.readyState === WebSocket.OPEN) {
+        client.send(data, { binary: isBinary });
+      }
+    });
+  });
+});
+```
+
+### Round-trip time
+
+```js
+import WebSocket from 'ws';
+
+const ws = new WebSocket('wss://websocket-echo.com/');
+
+ws.on('error', console.error);
+
+ws.on('open', function open() {
+  console.log('connected');
+  ws.send(Date.now());
+});
+
+ws.on('close', function close() {
+  console.log('disconnected');
+});
+
+ws.on('message', function message(data) {
+  console.log(`Round-trip time: ${Date.now() - data} ms`);
+
+  setTimeout(function timeout() {
+    ws.send(Date.now());
+  }, 500);
+});
+```
+
+### Use the Node.js streams API
+
+```js
+import WebSocket, { createWebSocketStream } from 'ws';
+
+const ws = new WebSocket('wss://websocket-echo.com/');
+
+const duplex = createWebSocketStream(ws, { encoding: 'utf8' });
+
+duplex.on('error', console.error);
+
+duplex.pipe(process.stdout);
+process.stdin.pipe(duplex);
+```
+
+### Other examples
+
+For a full example with a browser client communicating with a ws server, see the
+examples folder.
+
+Otherwise, see the test cases.
+
+## FAQ
+
+### How to get the IP address of the client?
+
+The remote IP address can be obtained from the raw socket.
+
+```js
+import { WebSocketServer } from 'ws';
+
+const wss = new WebSocketServer({ port: 8080 });
+
+wss.on('connection', function connection(ws, req) {
+  const ip = req.socket.remoteAddress;
+
+  ws.on('error', console.error);
+});
+```
+
+When the server runs behind a proxy like NGINX, the de-facto standard is to use
+the `X-Forwarded-For` header.
+
+```js
+wss.on('connection', function connection(ws, req) {
+  const ip = req.headers['x-forwarded-for'].split(',')[0].trim();
+
+  ws.on('error', console.error);
+});
+```
+
+### How to detect and close broken connections?
+
+Sometimes, the link between the server and the client can be interrupted in a
+way that keeps both the server and the client unaware of the broken state of the
+connection (e.g. when pulling the cord).
+
+In these cases, ping messages can be used as a means to verify that the remote
+endpoint is still responsive.
+
+```js
+import { WebSocketServer } from 'ws';
+
+function heartbeat() {
+  this.isAlive = true;
+}
+
+const wss = new WebSocketServer({ port: 8080 });
+
+wss.on('connection', function connection(ws) {
+  ws.isAlive = true;
+  ws.on('error', console.error);
+  ws.on('pong', heartbeat);
+});
+
+const interval = setInterval(function ping() {
+  wss.clients.forEach(function each(ws) {
+    if (ws.isAlive === false) return ws.terminate();
+
+    ws.isAlive = false;
+    ws.ping();
+  });
+}, 30000);
+
+wss.on('close', function close() {
+  clearInterval(interval);
+});
+```
+
+Pong messages are automatically sent in response to ping messages as required by
+the spec.
+
+Just like the server example above, your clients might as well lose connection
+without knowing it. You might want to add a ping listener on your clients to
+prevent that. A simple implementation would be:
+
+```js
+import WebSocket from 'ws';
+
+function heartbeat() {
+  clearTimeout(this.pingTimeout);
+
+  // Use `WebSocket#terminate()`, which immediately destroys the connection,
+  // instead of `WebSocket#close()`, which waits for the close timer.
+  // Delay should be equal to the interval at which your server
+  // sends out pings plus a conservative assumption of the latency.
+  this.pingTimeout = setTimeout(() => {
+    this.terminate();
+  }, 30000 + 1000);
+}
+
+const client = new WebSocket('wss://websocket-echo.com/');
+
+client.on('error', console.error);
+client.on('open', heartbeat);
+client.on('ping', heartbeat);
+client.on('close', function clear() {
+  clearTimeout(this.pingTimeout);
+});
+```
+
+### How to connect via a proxy?
+
+Use a custom `http.Agent` implementation like [https-proxy-agent][] or
+[socks-proxy-agent][].
+
+## Changelog
+
+We're using the GitHub [releases][changelog] for changelog entries.
+
+## License
+
+[MIT](LICENSE)
+
+[`buffer.isutf8()`]: https://nodejs.org/api/buffer.html#bufferisutf8input
+[bufferutil]: https://github.com/websockets/bufferutil
+[changelog]: https://github.com/websockets/ws/releases
+[client-report]: http://websockets.github.io/ws/autobahn/clients/
+[https-proxy-agent]: https://github.com/TooTallNate/node-https-proxy-agent
+[node-zlib-bug]: https://github.com/nodejs/node/issues/8871
+[node-zlib-deflaterawdocs]:
+  https://nodejs.org/api/zlib.html#zlib_zlib_createdeflateraw_options
+[permessage-deflate]: https://tools.ietf.org/html/rfc7692
+[server-report]: http://websockets.github.io/ws/autobahn/servers/
+[session-parse-example]: ./examples/express-session-parse
+[socks-proxy-agent]: https://github.com/TooTallNate/node-socks-proxy-agent
+[utf-8-validate]: https://github.com/websockets/utf-8-validate
+[ws-server-options]: ./doc/ws.md#new-websocketserveroptions-callback
diff --git a/mqtt-backend/node_modules/ws/browser.js b/mqtt-backend/node_modules/ws/browser.js
new file mode 100644
index 0000000..ca4f628
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/browser.js
@@ -0,0 +1,8 @@
+'use strict';
+
+module.exports = function () {
+  throw new Error(
+    'ws does not work in the browser. Browser clients must use the native ' +
+      'WebSocket object'
+  );
+};
diff --git a/mqtt-backend/node_modules/ws/index.js b/mqtt-backend/node_modules/ws/index.js
new file mode 100644
index 0000000..3fdb7b2
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/index.js
@@ -0,0 +1,22 @@
+'use strict';
+
+const createWebSocketStream = require('./lib/stream');
+const extension = require('./lib/extension');
+const PerMessageDeflate = require('./lib/permessage-deflate');
+const Receiver = require('./lib/receiver');
+const Sender = require('./lib/sender');
+const subprotocol = require('./lib/subprotocol');
+const WebSocket = require('./lib/websocket');
+const WebSocketServer = require('./lib/websocket-server');
+
+WebSocket.createWebSocketStream = createWebSocketStream;
+WebSocket.extension = extension;
+WebSocket.PerMessageDeflate = PerMessageDeflate;
+WebSocket.Receiver = Receiver;
+WebSocket.Sender = Sender;
+WebSocket.Server = WebSocketServer;
+WebSocket.subprotocol = subprotocol;
+WebSocket.WebSocket = WebSocket;
+WebSocket.WebSocketServer = WebSocketServer;
+
+module.exports = WebSocket;
diff --git a/mqtt-backend/node_modules/ws/lib/buffer-util.js b/mqtt-backend/node_modules/ws/lib/buffer-util.js
new file mode 100644
index 0000000..f7536e2
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/buffer-util.js
@@ -0,0 +1,131 @@
+'use strict';
+
+const { EMPTY_BUFFER } = require('./constants');
+
+const FastBuffer = Buffer[Symbol.species];
+
+/**
+ * Merges an array of buffers into a new buffer.
+ *
+ * @param {Buffer[]} list The array of buffers to concat
+ * @param {Number} totalLength The total length of buffers in the list
+ * @return {Buffer} The resulting buffer
+ * @public
+ */
+function concat(list, totalLength) {
+  if (list.length === 0) return EMPTY_BUFFER;
+  if (list.length === 1) return list[0];
+
+  const target = Buffer.allocUnsafe(totalLength);
+  let offset = 0;
+
+  for (let i = 0; i < list.length; i++) {
+    const buf = list[i];
+    target.set(buf, offset);
+    offset += buf.length;
+  }
+
+  if (offset < totalLength) {
+    return new FastBuffer(target.buffer, target.byteOffset, offset);
+  }
+
+  return target;
+}
+
+/**
+ * Masks a buffer using the given mask.
+ *
+ * @param {Buffer} source The buffer to mask
+ * @param {Buffer} mask The mask to use
+ * @param {Buffer} output The buffer where to store the result
+ * @param {Number} offset The offset at which to start writing
+ * @param {Number} length The number of bytes to mask.
+ * @public
+ */
+function _mask(source, mask, output, offset, length) {
+  for (let i = 0; i < length; i++) {
+    output[offset + i] = source[i] ^ mask[i & 3];
+  }
+}
+
+/**
+ * Unmasks a buffer using the given mask.
+ *
+ * @param {Buffer} buffer The buffer to unmask
+ * @param {Buffer} mask The mask to use
+ * @public
+ */
+function _unmask(buffer, mask) {
+  for (let i = 0; i < buffer.length; i++) {
+    buffer[i] ^= mask[i & 3];
+  }
+}
+
+/**
+ * Converts a buffer to an `ArrayBuffer`.
+ *
+ * @param {Buffer} buf The buffer to convert
+ * @return {ArrayBuffer} Converted buffer
+ * @public
+ */
+function toArrayBuffer(buf) {
+  if (buf.length === buf.buffer.byteLength) {
+    return buf.buffer;
+  }
+
+  return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.length);
+}
+
+/**
+ * Converts `data` to a `Buffer`.
+ *
+ * @param {*} data The data to convert
+ * @return {Buffer} The buffer
+ * @throws {TypeError}
+ * @public
+ */
+function toBuffer(data) {
+  toBuffer.readOnly = true;
+
+  if (Buffer.isBuffer(data)) return data;
+
+  let buf;
+
+  if (data instanceof ArrayBuffer) {
+    buf = new FastBuffer(data);
+  } else if (ArrayBuffer.isView(data)) {
+    buf = new FastBuffer(data.buffer, data.byteOffset, data.byteLength);
+  } else {
+    buf = Buffer.from(data);
+    toBuffer.readOnly = false;
+  }
+
+  return buf;
+}
+
+module.exports = {
+  concat,
+  mask: _mask,
+  toArrayBuffer,
+  toBuffer,
+  unmask: _unmask
+};
+
+/* istanbul ignore else  */
+if (!process.env.WS_NO_BUFFER_UTIL) {
+  try {
+    const bufferUtil = require('bufferutil');
+
+    module.exports.mask = function (source, mask, output, offset, length) {
+      if (length < 48) _mask(source, mask, output, offset, length);
+      else bufferUtil.mask(source, mask, output, offset, length);
+    };
+
+    module.exports.unmask = function (buffer, mask) {
+      if (buffer.length < 32) _unmask(buffer, mask);
+      else bufferUtil.unmask(buffer, mask);
+    };
+  } catch (e) {
+    // Continue regardless of the error.
+  }
+}
diff --git a/mqtt-backend/node_modules/ws/lib/constants.js b/mqtt-backend/node_modules/ws/lib/constants.js
new file mode 100644
index 0000000..69b2fe3
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/constants.js
@@ -0,0 +1,19 @@
+'use strict';
+
+const BINARY_TYPES = ['nodebuffer', 'arraybuffer', 'fragments'];
+const hasBlob = typeof Blob !== 'undefined';
+
+if (hasBlob) BINARY_TYPES.push('blob');
+
+module.exports = {
+  BINARY_TYPES,
+  CLOSE_TIMEOUT: 30000,
+  EMPTY_BUFFER: Buffer.alloc(0),
+  GUID: '258EAFA5-E914-47DA-95CA-C5AB0DC85B11',
+  hasBlob,
+  kForOnEventAttribute: Symbol('kIsForOnEventAttribute'),
+  kListener: Symbol('kListener'),
+  kStatusCode: Symbol('status-code'),
+  kWebSocket: Symbol('websocket'),
+  NOOP: () => {}
+};
diff --git a/mqtt-backend/node_modules/ws/lib/event-target.js b/mqtt-backend/node_modules/ws/lib/event-target.js
new file mode 100644
index 0000000..fea4cbc
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/event-target.js
@@ -0,0 +1,292 @@
+'use strict';
+
+const { kForOnEventAttribute, kListener } = require('./constants');
+
+const kCode = Symbol('kCode');
+const kData = Symbol('kData');
+const kError = Symbol('kError');
+const kMessage = Symbol('kMessage');
+const kReason = Symbol('kReason');
+const kTarget = Symbol('kTarget');
+const kType = Symbol('kType');
+const kWasClean = Symbol('kWasClean');
+
+/**
+ * Class representing an event.
+ */
+class Event {
+  /**
+   * Create a new `Event`.
+   *
+   * @param {String} type The name of the event
+   * @throws {TypeError} If the `type` argument is not specified
+   */
+  constructor(type) {
+    this[kTarget] = null;
+    this[kType] = type;
+  }
+
+  /**
+   * @type {*}
+   */
+  get target() {
+    return this[kTarget];
+  }
+
+  /**
+   * @type {String}
+   */
+  get type() {
+    return this[kType];
+  }
+}
+
+Object.defineProperty(Event.prototype, 'target', { enumerable: true });
+Object.defineProperty(Event.prototype, 'type', { enumerable: true });
+
+/**
+ * Class representing a close event.
+ *
+ * @extends Event
+ */
+class CloseEvent extends Event {
+  /**
+   * Create a new `CloseEvent`.
+   *
+   * @param {String} type The name of the event
+   * @param {Object} [options] A dictionary object that allows for setting
+   *     attributes via object members of the same name
+   * @param {Number} [options.code=0] The status code explaining why the
+   *     connection was closed
+   * @param {String} [options.reason=''] A human-readable string explaining why
+   *     the connection was closed
+   * @param {Boolean} [options.wasClean=false] Indicates whether or not the
+   *     connection was cleanly closed
+   */
+  constructor(type, options = {}) {
+    super(type);
+
+    this[kCode] = options.code === undefined ? 0 : options.code;
+    this[kReason] = options.reason === undefined ? '' : options.reason;
+    this[kWasClean] = options.wasClean === undefined ? false : options.wasClean;
+  }
+
+  /**
+   * @type {Number}
+   */
+  get code() {
+    return this[kCode];
+  }
+
+  /**
+   * @type {String}
+   */
+  get reason() {
+    return this[kReason];
+  }
+
+  /**
+   * @type {Boolean}
+   */
+  get wasClean() {
+    return this[kWasClean];
+  }
+}
+
+Object.defineProperty(CloseEvent.prototype, 'code', { enumerable: true });
+Object.defineProperty(CloseEvent.prototype, 'reason', { enumerable: true });
+Object.defineProperty(CloseEvent.prototype, 'wasClean', { enumerable: true });
+
+/**
+ * Class representing an error event.
+ *
+ * @extends Event
+ */
+class ErrorEvent extends Event {
+  /**
+   * Create a new `ErrorEvent`.
+   *
+   * @param {String} type The name of the event
+   * @param {Object} [options] A dictionary object that allows for setting
+   *     attributes via object members of the same name
+   * @param {*} [options.error=null] The error that generated this event
+   * @param {String} [options.message=''] The error message
+   */
+  constructor(type, options = {}) {
+    super(type);
+
+    this[kError] = options.error === undefined ? null : options.error;
+    this[kMessage] = options.message === undefined ? '' : options.message;
+  }
+
+  /**
+   * @type {*}
+   */
+  get error() {
+    return this[kError];
+  }
+
+  /**
+   * @type {String}
+   */
+  get message() {
+    return this[kMessage];
+  }
+}
+
+Object.defineProperty(ErrorEvent.prototype, 'error', { enumerable: true });
+Object.defineProperty(ErrorEvent.prototype, 'message', { enumerable: true });
+
+/**
+ * Class representing a message event.
+ *
+ * @extends Event
+ */
+class MessageEvent extends Event {
+  /**
+   * Create a new `MessageEvent`.
+   *
+   * @param {String} type The name of the event
+   * @param {Object} [options] A dictionary object that allows for setting
+   *     attributes via object members of the same name
+   * @param {*} [options.data=null] The message content
+   */
+  constructor(type, options = {}) {
+    super(type);
+
+    this[kData] = options.data === undefined ? null : options.data;
+  }
+
+  /**
+   * @type {*}
+   */
+  get data() {
+    return this[kData];
+  }
+}
+
+Object.defineProperty(MessageEvent.prototype, 'data', { enumerable: true });
+
+/**
+ * This provides methods for emulating the `EventTarget` interface. It's not
+ * meant to be used directly.
+ *
+ * @mixin
+ */
+const EventTarget = {
+  /**
+   * Register an event listener.
+   *
+   * @param {String} type A string representing the event type to listen for
+   * @param {(Function|Object)} handler The listener to add
+   * @param {Object} [options] An options object specifies characteristics about
+   *     the event listener
+   * @param {Boolean} [options.once=false] A `Boolean` indicating that the
+   *     listener should be invoked at most once after being added. If `true`,
+   *     the listener would be automatically removed when invoked.
+   * @public
+   */
+  addEventListener(type, handler, options = {}) {
+    for (const listener of this.listeners(type)) {
+      if (
+        !options[kForOnEventAttribute] &&
+        listener[kListener] === handler &&
+        !listener[kForOnEventAttribute]
+      ) {
+        return;
+      }
+    }
+
+    let wrapper;
+
+    if (type === 'message') {
+      wrapper = function onMessage(data, isBinary) {
+        const event = new MessageEvent('message', {
+          data: isBinary ? data : data.toString()
+        });
+
+        event[kTarget] = this;
+        callListener(handler, this, event);
+      };
+    } else if (type === 'close') {
+      wrapper = function onClose(code, message) {
+        const event = new CloseEvent('close', {
+          code,
+          reason: message.toString(),
+          wasClean: this._closeFrameReceived && this._closeFrameSent
+        });
+
+        event[kTarget] = this;
+        callListener(handler, this, event);
+      };
+    } else if (type === 'error') {
+      wrapper = function onError(error) {
+        const event = new ErrorEvent('error', {
+          error,
+          message: error.message
+        });
+
+        event[kTarget] = this;
+        callListener(handler, this, event);
+      };
+    } else if (type === 'open') {
+      wrapper = function onOpen() {
+        const event = new Event('open');
+
+        event[kTarget] = this;
+        callListener(handler, this, event);
+      };
+    } else {
+      return;
+    }
+
+    wrapper[kForOnEventAttribute] = !!options[kForOnEventAttribute];
+    wrapper[kListener] = handler;
+
+    if (options.once) {
+      this.once(type, wrapper);
+    } else {
+      this.on(type, wrapper);
+    }
+  },
+
+  /**
+   * Remove an event listener.
+   *
+   * @param {String} type A string representing the event type to remove
+   * @param {(Function|Object)} handler The listener to remove
+   * @public
+   */
+  removeEventListener(type, handler) {
+    for (const listener of this.listeners(type)) {
+      if (listener[kListener] === handler && !listener[kForOnEventAttribute]) {
+        this.removeListener(type, listener);
+        break;
+      }
+    }
+  }
+};
+
+module.exports = {
+  CloseEvent,
+  ErrorEvent,
+  Event,
+  EventTarget,
+  MessageEvent
+};
+
+/**
+ * Call an event listener
+ *
+ * @param {(Function|Object)} listener The listener to call
+ * @param {*} thisArg The value to use as `this`` when calling the listener
+ * @param {Event} event The event to pass to the listener
+ * @private
+ */
+function callListener(listener, thisArg, event) {
+  if (typeof listener === 'object' && listener.handleEvent) {
+    listener.handleEvent.call(listener, event);
+  } else {
+    listener.call(thisArg, event);
+  }
+}
diff --git a/mqtt-backend/node_modules/ws/lib/extension.js b/mqtt-backend/node_modules/ws/lib/extension.js
new file mode 100644
index 0000000..3d7895c
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/extension.js
@@ -0,0 +1,203 @@
+'use strict';
+
+const { tokenChars } = require('./validation');
+
+/**
+ * Adds an offer to the map of extension offers or a parameter to the map of
+ * parameters.
+ *
+ * @param {Object} dest The map of extension offers or parameters
+ * @param {String} name The extension or parameter name
+ * @param {(Object|Boolean|String)} elem The extension parameters or the
+ *     parameter value
+ * @private
+ */
+function push(dest, name, elem) {
+  if (dest[name] === undefined) dest[name] = [elem];
+  else dest[name].push(elem);
+}
+
+/**
+ * Parses the `Sec-WebSocket-Extensions` header into an object.
+ *
+ * @param {String} header The field value of the header
+ * @return {Object} The parsed object
+ * @public
+ */
+function parse(header) {
+  const offers = Object.create(null);
+  let params = Object.create(null);
+  let mustUnescape = false;
+  let isEscaping = false;
+  let inQuotes = false;
+  let extensionName;
+  let paramName;
+  let start = -1;
+  let code = -1;
+  let end = -1;
+  let i = 0;
+
+  for (; i < header.length; i++) {
+    code = header.charCodeAt(i);
+
+    if (extensionName === undefined) {
+      if (end === -1 && tokenChars[code] === 1) {
+        if (start === -1) start = i;
+      } else if (
+        i !== 0 &&
+        (code === 0x20 /* ' ' */ || code === 0x09) /* '\t' */
+      ) {
+        if (end === -1 && start !== -1) end = i;
+      } else if (code === 0x3b /* ';' */ || code === 0x2c /* ',' */) {
+        if (start === -1) {
+          throw new SyntaxError(`Unexpected character at index ${i}`);
+        }
+
+        if (end === -1) end = i;
+        const name = header.slice(start, end);
+        if (code === 0x2c) {
+          push(offers, name, params);
+          params = Object.create(null);
+        } else {
+          extensionName = name;
+        }
+
+        start = end = -1;
+      } else {
+        throw new SyntaxError(`Unexpected character at index ${i}`);
+      }
+    } else if (paramName === undefined) {
+      if (end === -1 && tokenChars[code] === 1) {
+        if (start === -1) start = i;
+      } else if (code === 0x20 || code === 0x09) {
+        if (end === -1 && start !== -1) end = i;
+      } else if (code === 0x3b || code === 0x2c) {
+        if (start === -1) {
+          throw new SyntaxError(`Unexpected character at index ${i}`);
+        }
+
+        if (end === -1) end = i;
+        push(params, header.slice(start, end), true);
+        if (code === 0x2c) {
+          push(offers, extensionName, params);
+          params = Object.create(null);
+          extensionName = undefined;
+        }
+
+        start = end = -1;
+      } else if (code === 0x3d /* '=' */ && start !== -1 && end === -1) {
+        paramName = header.slice(start, i);
+        start = end = -1;
+      } else {
+        throw new SyntaxError(`Unexpected character at index ${i}`);
+      }
+    } else {
+      //
+      // The value of a quoted-string after unescaping must conform to the
+      // token ABNF, so only token characters are valid.
+      // Ref: https://tools.ietf.org/html/rfc6455#section-9.1
+      //
+      if (isEscaping) {
+        if (tokenChars[code] !== 1) {
+          throw new SyntaxError(`Unexpected character at index ${i}`);
+        }
+        if (start === -1) start = i;
+        else if (!mustUnescape) mustUnescape = true;
+        isEscaping = false;
+      } else if (inQuotes) {
+        if (tokenChars[code] === 1) {
+          if (start === -1) start = i;
+        } else if (code === 0x22 /* '"' */ && start !== -1) {
+          inQuotes = false;
+          end = i;
+        } else if (code === 0x5c /* '\' */) {
+          isEscaping = true;
+        } else {
+          throw new SyntaxError(`Unexpected character at index ${i}`);
+        }
+      } else if (code === 0x22 && header.charCodeAt(i - 1) === 0x3d) {
+        inQuotes = true;
+      } else if (end === -1 && tokenChars[code] === 1) {
+        if (start === -1) start = i;
+      } else if (start !== -1 && (code === 0x20 || code === 0x09)) {
+        if (end === -1) end = i;
+      } else if (code === 0x3b || code === 0x2c) {
+        if (start === -1) {
+          throw new SyntaxError(`Unexpected character at index ${i}`);
+        }
+
+        if (end === -1) end = i;
+        let value = header.slice(start, end);
+        if (mustUnescape) {
+          value = value.replace(/\\/g, '');
+          mustUnescape = false;
+        }
+        push(params, paramName, value);
+        if (code === 0x2c) {
+          push(offers, extensionName, params);
+          params = Object.create(null);
+          extensionName = undefined;
+        }
+
+        paramName = undefined;
+        start = end = -1;
+      } else {
+        throw new SyntaxError(`Unexpected character at index ${i}`);
+      }
+    }
+  }
+
+  if (start === -1 || inQuotes || code === 0x20 || code === 0x09) {
+    throw new SyntaxError('Unexpected end of input');
+  }
+
+  if (end === -1) end = i;
+  const token = header.slice(start, end);
+  if (extensionName === undefined) {
+    push(offers, token, params);
+  } else {
+    if (paramName === undefined) {
+      push(params, token, true);
+    } else if (mustUnescape) {
+      push(params, paramName, token.replace(/\\/g, ''));
+    } else {
+      push(params, paramName, token);
+    }
+    push(offers, extensionName, params);
+  }
+
+  return offers;
+}
+
+/**
+ * Builds the `Sec-WebSocket-Extensions` header field value.
+ *
+ * @param {Object} extensions The map of extensions and parameters to format
+ * @return {String} A string representing the given object
+ * @public
+ */
+function format(extensions) {
+  return Object.keys(extensions)
+    .map((extension) => {
+      let configurations = extensions[extension];
+      if (!Array.isArray(configurations)) configurations = [configurations];
+      return configurations
+        .map((params) => {
+          return [extension]
+            .concat(
+              Object.keys(params).map((k) => {
+                let values = params[k];
+                if (!Array.isArray(values)) values = [values];
+                return values
+                  .map((v) => (v === true ? k : `${k}=${v}`))
+                  .join('; ');
+              })
+            )
+            .join('; ');
+        })
+        .join(', ');
+    })
+    .join(', ');
+}
+
+module.exports = { format, parse };
diff --git a/mqtt-backend/node_modules/ws/lib/limiter.js b/mqtt-backend/node_modules/ws/lib/limiter.js
new file mode 100644
index 0000000..3fd3578
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/limiter.js
@@ -0,0 +1,55 @@
+'use strict';
+
+const kDone = Symbol('kDone');
+const kRun = Symbol('kRun');
+
+/**
+ * A very simple job queue with adjustable concurrency. Adapted from
+ * https://github.com/STRML/async-limiter
+ */
+class Limiter {
+  /**
+   * Creates a new `Limiter`.
+   *
+   * @param {Number} [concurrency=Infinity] The maximum number of jobs allowed
+   *     to run concurrently
+   */
+  constructor(concurrency) {
+    this[kDone] = () => {
+      this.pending--;
+      this[kRun]();
+    };
+    this.concurrency = concurrency || Infinity;
+    this.jobs = [];
+    this.pending = 0;
+  }
+
+  /**
+   * Adds a job to the queue.
+   *
+   * @param {Function} job The job to run
+   * @public
+   */
+  add(job) {
+    this.jobs.push(job);
+    this[kRun]();
+  }
+
+  /**
+   * Removes a job from the queue and runs it if possible.
+   *
+   * @private
+   */
+  [kRun]() {
+    if (this.pending === this.concurrency) return;
+
+    if (this.jobs.length) {
+      const job = this.jobs.shift();
+
+      this.pending++;
+      job(this[kDone]);
+    }
+  }
+}
+
+module.exports = Limiter;
diff --git a/mqtt-backend/node_modules/ws/lib/permessage-deflate.js b/mqtt-backend/node_modules/ws/lib/permessage-deflate.js
new file mode 100644
index 0000000..aa5db76
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/permessage-deflate.js
@@ -0,0 +1,528 @@
+'use strict';
+
+const zlib = require('zlib');
+
+const bufferUtil = require('./buffer-util');
+const Limiter = require('./limiter');
+const { kStatusCode } = require('./constants');
+
+const FastBuffer = Buffer[Symbol.species];
+const TRAILER = Buffer.from([0x00, 0x00, 0xff, 0xff]);
+const kPerMessageDeflate = Symbol('permessage-deflate');
+const kTotalLength = Symbol('total-length');
+const kCallback = Symbol('callback');
+const kBuffers = Symbol('buffers');
+const kError = Symbol('error');
+
+//
+// We limit zlib concurrency, which prevents severe memory fragmentation
+// as documented in https://github.com/nodejs/node/issues/8871#issuecomment-250915913
+// and https://github.com/websockets/ws/issues/1202
+//
+// Intentionally global; it's the global thread pool that's an issue.
+//
+let zlibLimiter;
+
+/**
+ * permessage-deflate implementation.
+ */
+class PerMessageDeflate {
+  /**
+   * Creates a PerMessageDeflate instance.
+   *
+   * @param {Object} [options] Configuration options
+   * @param {(Boolean|Number)} [options.clientMaxWindowBits] Advertise support
+   *     for, or request, a custom client window size
+   * @param {Boolean} [options.clientNoContextTakeover=false] Advertise/
+   *     acknowledge disabling of client context takeover
+   * @param {Number} [options.concurrencyLimit=10] The number of concurrent
+   *     calls to zlib
+   * @param {Boolean} [options.isServer=false] Create the instance in either
+   *     server or client mode
+   * @param {Number} [options.maxPayload=0] The maximum allowed message length
+   * @param {(Boolean|Number)} [options.serverMaxWindowBits] Request/confirm the
+   *     use of a custom server window size
+   * @param {Boolean} [options.serverNoContextTakeover=false] Request/accept
+   *     disabling of server context takeover
+   * @param {Number} [options.threshold=1024] Size (in bytes) below which
+   *     messages should not be compressed if context takeover is disabled
+   * @param {Object} [options.zlibDeflateOptions] Options to pass to zlib on
+   *     deflate
+   * @param {Object} [options.zlibInflateOptions] Options to pass to zlib on
+   *     inflate
+   */
+  constructor(options) {
+    this._options = options || {};
+    this._threshold =
+      this._options.threshold !== undefined ? this._options.threshold : 1024;
+    this._maxPayload = this._options.maxPayload | 0;
+    this._isServer = !!this._options.isServer;
+    this._deflate = null;
+    this._inflate = null;
+
+    this.params = null;
+
+    if (!zlibLimiter) {
+      const concurrency =
+        this._options.concurrencyLimit !== undefined
+          ? this._options.concurrencyLimit
+          : 10;
+      zlibLimiter = new Limiter(concurrency);
+    }
+  }
+
+  /**
+   * @type {String}
+   */
+  static get extensionName() {
+    return 'permessage-deflate';
+  }
+
+  /**
+   * Create an extension negotiation offer.
+   *
+   * @return {Object} Extension parameters
+   * @public
+   */
+  offer() {
+    const params = {};
+
+    if (this._options.serverNoContextTakeover) {
+      params.server_no_context_takeover = true;
+    }
+    if (this._options.clientNoContextTakeover) {
+      params.client_no_context_takeover = true;
+    }
+    if (this._options.serverMaxWindowBits) {
+      params.server_max_window_bits = this._options.serverMaxWindowBits;
+    }
+    if (this._options.clientMaxWindowBits) {
+      params.client_max_window_bits = this._options.clientMaxWindowBits;
+    } else if (this._options.clientMaxWindowBits == null) {
+      params.client_max_window_bits = true;
+    }
+
+    return params;
+  }
+
+  /**
+   * Accept an extension negotiation offer/response.
+   *
+   * @param {Array} configurations The extension negotiation offers/reponse
+   * @return {Object} Accepted configuration
+   * @public
+   */
+  accept(configurations) {
+    configurations = this.normalizeParams(configurations);
+
+    this.params = this._isServer
+      ? this.acceptAsServer(configurations)
+      : this.acceptAsClient(configurations);
+
+    return this.params;
+  }
+
+  /**
+   * Releases all resources used by the extension.
+   *
+   * @public
+   */
+  cleanup() {
+    if (this._inflate) {
+      this._inflate.close();
+      this._inflate = null;
+    }
+
+    if (this._deflate) {
+      const callback = this._deflate[kCallback];
+
+      this._deflate.close();
+      this._deflate = null;
+
+      if (callback) {
+        callback(
+          new Error(
+            'The deflate stream was closed while data was being processed'
+          )
+        );
+      }
+    }
+  }
+
+  /**
+   *  Accept an extension negotiation offer.
+   *
+   * @param {Array} offers The extension negotiation offers
+   * @return {Object} Accepted configuration
+   * @private
+   */
+  acceptAsServer(offers) {
+    const opts = this._options;
+    const accepted = offers.find((params) => {
+      if (
+        (opts.serverNoContextTakeover === false &&
+          params.server_no_context_takeover) ||
+        (params.server_max_window_bits &&
+          (opts.serverMaxWindowBits === false ||
+            (typeof opts.serverMaxWindowBits === 'number' &&
+              opts.serverMaxWindowBits > params.server_max_window_bits))) ||
+        (typeof opts.clientMaxWindowBits === 'number' &&
+          !params.client_max_window_bits)
+      ) {
+        return false;
+      }
+
+      return true;
+    });
+
+    if (!accepted) {
+      throw new Error('None of the extension offers can be accepted');
+    }
+
+    if (opts.serverNoContextTakeover) {
+      accepted.server_no_context_takeover = true;
+    }
+    if (opts.clientNoContextTakeover) {
+      accepted.client_no_context_takeover = true;
+    }
+    if (typeof opts.serverMaxWindowBits === 'number') {
+      accepted.server_max_window_bits = opts.serverMaxWindowBits;
+    }
+    if (typeof opts.clientMaxWindowBits === 'number') {
+      accepted.client_max_window_bits = opts.clientMaxWindowBits;
+    } else if (
+      accepted.client_max_window_bits === true ||
+      opts.clientMaxWindowBits === false
+    ) {
+      delete accepted.client_max_window_bits;
+    }
+
+    return accepted;
+  }
+
+  /**
+   * Accept the extension negotiation response.
+   *
+   * @param {Array} response The extension negotiation response
+   * @return {Object} Accepted configuration
+   * @private
+   */
+  acceptAsClient(response) {
+    const params = response[0];
+
+    if (
+      this._options.clientNoContextTakeover === false &&
+      params.client_no_context_takeover
+    ) {
+      throw new Error('Unexpected parameter "client_no_context_takeover"');
+    }
+
+    if (!params.client_max_window_bits) {
+      if (typeof this._options.clientMaxWindowBits === 'number') {
+        params.client_max_window_bits = this._options.clientMaxWindowBits;
+      }
+    } else if (
+      this._options.clientMaxWindowBits === false ||
+      (typeof this._options.clientMaxWindowBits === 'number' &&
+        params.client_max_window_bits > this._options.clientMaxWindowBits)
+    ) {
+      throw new Error(
+        'Unexpected or invalid parameter "client_max_window_bits"'
+      );
+    }
+
+    return params;
+  }
+
+  /**
+   * Normalize parameters.
+   *
+   * @param {Array} configurations The extension negotiation offers/reponse
+   * @return {Array} The offers/response with normalized parameters
+   * @private
+   */
+  normalizeParams(configurations) {
+    configurations.forEach((params) => {
+      Object.keys(params).forEach((key) => {
+        let value = params[key];
+
+        if (value.length > 1) {
+          throw new Error(`Parameter "${key}" must have only a single value`);
+        }
+
+        value = value[0];
+
+        if (key === 'client_max_window_bits') {
+          if (value !== true) {
+            const num = +value;
+            if (!Number.isInteger(num) || num < 8 || num > 15) {
+              throw new TypeError(
+                `Invalid value for parameter "${key}": ${value}`
+              );
+            }
+            value = num;
+          } else if (!this._isServer) {
+            throw new TypeError(
+              `Invalid value for parameter "${key}": ${value}`
+            );
+          }
+        } else if (key === 'server_max_window_bits') {
+          const num = +value;
+          if (!Number.isInteger(num) || num < 8 || num > 15) {
+            throw new TypeError(
+              `Invalid value for parameter "${key}": ${value}`
+            );
+          }
+          value = num;
+        } else if (
+          key === 'client_no_context_takeover' ||
+          key === 'server_no_context_takeover'
+        ) {
+          if (value !== true) {
+            throw new TypeError(
+              `Invalid value for parameter "${key}": ${value}`
+            );
+          }
+        } else {
+          throw new Error(`Unknown parameter "${key}"`);
+        }
+
+        params[key] = value;
+      });
+    });
+
+    return configurations;
+  }
+
+  /**
+   * Decompress data. Concurrency limited.
+   *
+   * @param {Buffer} data Compressed data
+   * @param {Boolean} fin Specifies whether or not this is the last fragment
+   * @param {Function} callback Callback
+   * @public
+   */
+  decompress(data, fin, callback) {
+    zlibLimiter.add((done) => {
+      this._decompress(data, fin, (err, result) => {
+        done();
+        callback(err, result);
+      });
+    });
+  }
+
+  /**
+   * Compress data. Concurrency limited.
+   *
+   * @param {(Buffer|String)} data Data to compress
+   * @param {Boolean} fin Specifies whether or not this is the last fragment
+   * @param {Function} callback Callback
+   * @public
+   */
+  compress(data, fin, callback) {
+    zlibLimiter.add((done) => {
+      this._compress(data, fin, (err, result) => {
+        done();
+        callback(err, result);
+      });
+    });
+  }
+
+  /**
+   * Decompress data.
+   *
+   * @param {Buffer} data Compressed data
+   * @param {Boolean} fin Specifies whether or not this is the last fragment
+   * @param {Function} callback Callback
+   * @private
+   */
+  _decompress(data, fin, callback) {
+    const endpoint = this._isServer ? 'client' : 'server';
+
+    if (!this._inflate) {
+      const key = `${endpoint}_max_window_bits`;
+      const windowBits =
+        typeof this.params[key] !== 'number'
+          ? zlib.Z_DEFAULT_WINDOWBITS
+          : this.params[key];
+
+      this._inflate = zlib.createInflateRaw({
+        ...this._options.zlibInflateOptions,
+        windowBits
+      });
+      this._inflate[kPerMessageDeflate] = this;
+      this._inflate[kTotalLength] = 0;
+      this._inflate[kBuffers] = [];
+      this._inflate.on('error', inflateOnError);
+      this._inflate.on('data', inflateOnData);
+    }
+
+    this._inflate[kCallback] = callback;
+
+    this._inflate.write(data);
+    if (fin) this._inflate.write(TRAILER);
+
+    this._inflate.flush(() => {
+      const err = this._inflate[kError];
+
+      if (err) {
+        this._inflate.close();
+        this._inflate = null;
+        callback(err);
+        return;
+      }
+
+      const data = bufferUtil.concat(
+        this._inflate[kBuffers],
+        this._inflate[kTotalLength]
+      );
+
+      if (this._inflate._readableState.endEmitted) {
+        this._inflate.close();
+        this._inflate = null;
+      } else {
+        this._inflate[kTotalLength] = 0;
+        this._inflate[kBuffers] = [];
+
+        if (fin && this.params[`${endpoint}_no_context_takeover`]) {
+          this._inflate.reset();
+        }
+      }
+
+      callback(null, data);
+    });
+  }
+
+  /**
+   * Compress data.
+   *
+   * @param {(Buffer|String)} data Data to compress
+   * @param {Boolean} fin Specifies whether or not this is the last fragment
+   * @param {Function} callback Callback
+   * @private
+   */
+  _compress(data, fin, callback) {
+    const endpoint = this._isServer ? 'server' : 'client';
+
+    if (!this._deflate) {
+      const key = `${endpoint}_max_window_bits`;
+      const windowBits =
+        typeof this.params[key] !== 'number'
+          ? zlib.Z_DEFAULT_WINDOWBITS
+          : this.params[key];
+
+      this._deflate = zlib.createDeflateRaw({
+        ...this._options.zlibDeflateOptions,
+        windowBits
+      });
+
+      this._deflate[kTotalLength] = 0;
+      this._deflate[kBuffers] = [];
+
+      this._deflate.on('data', deflateOnData);
+    }
+
+    this._deflate[kCallback] = callback;
+
+    this._deflate.write(data);
+    this._deflate.flush(zlib.Z_SYNC_FLUSH, () => {
+      if (!this._deflate) {
+        //
+        // The deflate stream was closed while data was being processed.
+        //
+        return;
+      }
+
+      let data = bufferUtil.concat(
+        this._deflate[kBuffers],
+        this._deflate[kTotalLength]
+      );
+
+      if (fin) {
+        data = new FastBuffer(data.buffer, data.byteOffset, data.length - 4);
+      }
+
+      //
+      // Ensure that the callback will not be called again in
+      // `PerMessageDeflate#cleanup()`.
+      //
+      this._deflate[kCallback] = null;
+
+      this._deflate[kTotalLength] = 0;
+      this._deflate[kBuffers] = [];
+
+      if (fin && this.params[`${endpoint}_no_context_takeover`]) {
+        this._deflate.reset();
+      }
+
+      callback(null, data);
+    });
+  }
+}
+
+module.exports = PerMessageDeflate;
+
+/**
+ * The listener of the `zlib.DeflateRaw` stream `'data'` event.
+ *
+ * @param {Buffer} chunk A chunk of data
+ * @private
+ */
+function deflateOnData(chunk) {
+  this[kBuffers].push(chunk);
+  this[kTotalLength] += chunk.length;
+}
+
+/**
+ * The listener of the `zlib.InflateRaw` stream `'data'` event.
+ *
+ * @param {Buffer} chunk A chunk of data
+ * @private
+ */
+function inflateOnData(chunk) {
+  this[kTotalLength] += chunk.length;
+
+  if (
+    this[kPerMessageDeflate]._maxPayload < 1 ||
+    this[kTotalLength] <= this[kPerMessageDeflate]._maxPayload
+  ) {
+    this[kBuffers].push(chunk);
+    return;
+  }
+
+  this[kError] = new RangeError('Max payload size exceeded');
+  this[kError].code = 'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH';
+  this[kError][kStatusCode] = 1009;
+  this.removeListener('data', inflateOnData);
+
+  //
+  // The choice to employ `zlib.reset()` over `zlib.close()` is dictated by the
+  // fact that in Node.js versions prior to 13.10.0, the callback for
+  // `zlib.flush()` is not called if `zlib.close()` is used. Utilizing
+  // `zlib.reset()` ensures that either the callback is invoked or an error is
+  // emitted.
+  //
+  this.reset();
+}
+
+/**
+ * The listener of the `zlib.InflateRaw` stream `'error'` event.
+ *
+ * @param {Error} err The emitted error
+ * @private
+ */
+function inflateOnError(err) {
+  //
+  // There is no need to call `Zlib#close()` as the handle is automatically
+  // closed when an error is emitted.
+  //
+  this[kPerMessageDeflate]._inflate = null;
+
+  if (this[kError]) {
+    this[kCallback](this[kError]);
+    return;
+  }
+
+  err[kStatusCode] = 1007;
+  this[kCallback](err);
+}
diff --git a/mqtt-backend/node_modules/ws/lib/receiver.js b/mqtt-backend/node_modules/ws/lib/receiver.js
new file mode 100644
index 0000000..54d9b4f
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/receiver.js
@@ -0,0 +1,706 @@
+'use strict';
+
+const { Writable } = require('stream');
+
+const PerMessageDeflate = require('./permessage-deflate');
+const {
+  BINARY_TYPES,
+  EMPTY_BUFFER,
+  kStatusCode,
+  kWebSocket
+} = require('./constants');
+const { concat, toArrayBuffer, unmask } = require('./buffer-util');
+const { isValidStatusCode, isValidUTF8 } = require('./validation');
+
+const FastBuffer = Buffer[Symbol.species];
+
+const GET_INFO = 0;
+const GET_PAYLOAD_LENGTH_16 = 1;
+const GET_PAYLOAD_LENGTH_64 = 2;
+const GET_MASK = 3;
+const GET_DATA = 4;
+const INFLATING = 5;
+const DEFER_EVENT = 6;
+
+/**
+ * HyBi Receiver implementation.
+ *
+ * @extends Writable
+ */
+class Receiver extends Writable {
+  /**
+   * Creates a Receiver instance.
+   *
+   * @param {Object} [options] Options object
+   * @param {Boolean} [options.allowSynchronousEvents=true] Specifies whether
+   *     any of the `'message'`, `'ping'`, and `'pong'` events can be emitted
+   *     multiple times in the same tick
+   * @param {String} [options.binaryType=nodebuffer] The type for binary data
+   * @param {Object} [options.extensions] An object containing the negotiated
+   *     extensions
+   * @param {Boolean} [options.isServer=false] Specifies whether to operate in
+   *     client or server mode
+   * @param {Number} [options.maxPayload=0] The maximum allowed message length
+   * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or
+   *     not to skip UTF-8 validation for text and close messages
+   */
+  constructor(options = {}) {
+    super();
+
+    this._allowSynchronousEvents =
+      options.allowSynchronousEvents !== undefined
+        ? options.allowSynchronousEvents
+        : true;
+    this._binaryType = options.binaryType || BINARY_TYPES[0];
+    this._extensions = options.extensions || {};
+    this._isServer = !!options.isServer;
+    this._maxPayload = options.maxPayload | 0;
+    this._skipUTF8Validation = !!options.skipUTF8Validation;
+    this[kWebSocket] = undefined;
+
+    this._bufferedBytes = 0;
+    this._buffers = [];
+
+    this._compressed = false;
+    this._payloadLength = 0;
+    this._mask = undefined;
+    this._fragmented = 0;
+    this._masked = false;
+    this._fin = false;
+    this._opcode = 0;
+
+    this._totalPayloadLength = 0;
+    this._messageLength = 0;
+    this._fragments = [];
+
+    this._errored = false;
+    this._loop = false;
+    this._state = GET_INFO;
+  }
+
+  /**
+   * Implements `Writable.prototype._write()`.
+   *
+   * @param {Buffer} chunk The chunk of data to write
+   * @param {String} encoding The character encoding of `chunk`
+   * @param {Function} cb Callback
+   * @private
+   */
+  _write(chunk, encoding, cb) {
+    if (this._opcode === 0x08 && this._state == GET_INFO) return cb();
+
+    this._bufferedBytes += chunk.length;
+    this._buffers.push(chunk);
+    this.startLoop(cb);
+  }
+
+  /**
+   * Consumes `n` bytes from the buffered data.
+   *
+   * @param {Number} n The number of bytes to consume
+   * @return {Buffer} The consumed bytes
+   * @private
+   */
+  consume(n) {
+    this._bufferedBytes -= n;
+
+    if (n === this._buffers[0].length) return this._buffers.shift();
+
+    if (n < this._buffers[0].length) {
+      const buf = this._buffers[0];
+      this._buffers[0] = new FastBuffer(
+        buf.buffer,
+        buf.byteOffset + n,
+        buf.length - n
+      );
+
+      return new FastBuffer(buf.buffer, buf.byteOffset, n);
+    }
+
+    const dst = Buffer.allocUnsafe(n);
+
+    do {
+      const buf = this._buffers[0];
+      const offset = dst.length - n;
+
+      if (n >= buf.length) {
+        dst.set(this._buffers.shift(), offset);
+      } else {
+        dst.set(new Uint8Array(buf.buffer, buf.byteOffset, n), offset);
+        this._buffers[0] = new FastBuffer(
+          buf.buffer,
+          buf.byteOffset + n,
+          buf.length - n
+        );
+      }
+
+      n -= buf.length;
+    } while (n > 0);
+
+    return dst;
+  }
+
+  /**
+   * Starts the parsing loop.
+   *
+   * @param {Function} cb Callback
+   * @private
+   */
+  startLoop(cb) {
+    this._loop = true;
+
+    do {
+      switch (this._state) {
+        case GET_INFO:
+          this.getInfo(cb);
+          break;
+        case GET_PAYLOAD_LENGTH_16:
+          this.getPayloadLength16(cb);
+          break;
+        case GET_PAYLOAD_LENGTH_64:
+          this.getPayloadLength64(cb);
+          break;
+        case GET_MASK:
+          this.getMask();
+          break;
+        case GET_DATA:
+          this.getData(cb);
+          break;
+        case INFLATING:
+        case DEFER_EVENT:
+          this._loop = false;
+          return;
+      }
+    } while (this._loop);
+
+    if (!this._errored) cb();
+  }
+
+  /**
+   * Reads the first two bytes of a frame.
+   *
+   * @param {Function} cb Callback
+   * @private
+   */
+  getInfo(cb) {
+    if (this._bufferedBytes < 2) {
+      this._loop = false;
+      return;
+    }
+
+    const buf = this.consume(2);
+
+    if ((buf[0] & 0x30) !== 0x00) {
+      const error = this.createError(
+        RangeError,
+        'RSV2 and RSV3 must be clear',
+        true,
+        1002,
+        'WS_ERR_UNEXPECTED_RSV_2_3'
+      );
+
+      cb(error);
+      return;
+    }
+
+    const compressed = (buf[0] & 0x40) === 0x40;
+
+    if (compressed && !this._extensions[PerMessageDeflate.extensionName]) {
+      const error = this.createError(
+        RangeError,
+        'RSV1 must be clear',
+        true,
+        1002,
+        'WS_ERR_UNEXPECTED_RSV_1'
+      );
+
+      cb(error);
+      return;
+    }
+
+    this._fin = (buf[0] & 0x80) === 0x80;
+    this._opcode = buf[0] & 0x0f;
+    this._payloadLength = buf[1] & 0x7f;
+
+    if (this._opcode === 0x00) {
+      if (compressed) {
+        const error = this.createError(
+          RangeError,
+          'RSV1 must be clear',
+          true,
+          1002,
+          'WS_ERR_UNEXPECTED_RSV_1'
+        );
+
+        cb(error);
+        return;
+      }
+
+      if (!this._fragmented) {
+        const error = this.createError(
+          RangeError,
+          'invalid opcode 0',
+          true,
+          1002,
+          'WS_ERR_INVALID_OPCODE'
+        );
+
+        cb(error);
+        return;
+      }
+
+      this._opcode = this._fragmented;
+    } else if (this._opcode === 0x01 || this._opcode === 0x02) {
+      if (this._fragmented) {
+        const error = this.createError(
+          RangeError,
+          `invalid opcode ${this._opcode}`,
+          true,
+          1002,
+          'WS_ERR_INVALID_OPCODE'
+        );
+
+        cb(error);
+        return;
+      }
+
+      this._compressed = compressed;
+    } else if (this._opcode > 0x07 && this._opcode < 0x0b) {
+      if (!this._fin) {
+        const error = this.createError(
+          RangeError,
+          'FIN must be set',
+          true,
+          1002,
+          'WS_ERR_EXPECTED_FIN'
+        );
+
+        cb(error);
+        return;
+      }
+
+      if (compressed) {
+        const error = this.createError(
+          RangeError,
+          'RSV1 must be clear',
+          true,
+          1002,
+          'WS_ERR_UNEXPECTED_RSV_1'
+        );
+
+        cb(error);
+        return;
+      }
+
+      if (
+        this._payloadLength > 0x7d ||
+        (this._opcode === 0x08 && this._payloadLength === 1)
+      ) {
+        const error = this.createError(
+          RangeError,
+          `invalid payload length ${this._payloadLength}`,
+          true,
+          1002,
+          'WS_ERR_INVALID_CONTROL_PAYLOAD_LENGTH'
+        );
+
+        cb(error);
+        return;
+      }
+    } else {
+      const error = this.createError(
+        RangeError,
+        `invalid opcode ${this._opcode}`,
+        true,
+        1002,
+        'WS_ERR_INVALID_OPCODE'
+      );
+
+      cb(error);
+      return;
+    }
+
+    if (!this._fin && !this._fragmented) this._fragmented = this._opcode;
+    this._masked = (buf[1] & 0x80) === 0x80;
+
+    if (this._isServer) {
+      if (!this._masked) {
+        const error = this.createError(
+          RangeError,
+          'MASK must be set',
+          true,
+          1002,
+          'WS_ERR_EXPECTED_MASK'
+        );
+
+        cb(error);
+        return;
+      }
+    } else if (this._masked) {
+      const error = this.createError(
+        RangeError,
+        'MASK must be clear',
+        true,
+        1002,
+        'WS_ERR_UNEXPECTED_MASK'
+      );
+
+      cb(error);
+      return;
+    }
+
+    if (this._payloadLength === 126) this._state = GET_PAYLOAD_LENGTH_16;
+    else if (this._payloadLength === 127) this._state = GET_PAYLOAD_LENGTH_64;
+    else this.haveLength(cb);
+  }
+
+  /**
+   * Gets extended payload length (7+16).
+   *
+   * @param {Function} cb Callback
+   * @private
+   */
+  getPayloadLength16(cb) {
+    if (this._bufferedBytes < 2) {
+      this._loop = false;
+      return;
+    }
+
+    this._payloadLength = this.consume(2).readUInt16BE(0);
+    this.haveLength(cb);
+  }
+
+  /**
+   * Gets extended payload length (7+64).
+   *
+   * @param {Function} cb Callback
+   * @private
+   */
+  getPayloadLength64(cb) {
+    if (this._bufferedBytes < 8) {
+      this._loop = false;
+      return;
+    }
+
+    const buf = this.consume(8);
+    const num = buf.readUInt32BE(0);
+
+    //
+    // The maximum safe integer in JavaScript is 2^53 - 1. An error is returned
+    // if payload length is greater than this number.
+    //
+    if (num > Math.pow(2, 53 - 32) - 1) {
+      const error = this.createError(
+        RangeError,
+        'Unsupported WebSocket frame: payload length > 2^53 - 1',
+        false,
+        1009,
+        'WS_ERR_UNSUPPORTED_DATA_PAYLOAD_LENGTH'
+      );
+
+      cb(error);
+      return;
+    }
+
+    this._payloadLength = num * Math.pow(2, 32) + buf.readUInt32BE(4);
+    this.haveLength(cb);
+  }
+
+  /**
+   * Payload length has been read.
+   *
+   * @param {Function} cb Callback
+   * @private
+   */
+  haveLength(cb) {
+    if (this._payloadLength && this._opcode < 0x08) {
+      this._totalPayloadLength += this._payloadLength;
+      if (this._totalPayloadLength > this._maxPayload && this._maxPayload > 0) {
+        const error = this.createError(
+          RangeError,
+          'Max payload size exceeded',
+          false,
+          1009,
+          'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH'
+        );
+
+        cb(error);
+        return;
+      }
+    }
+
+    if (this._masked) this._state = GET_MASK;
+    else this._state = GET_DATA;
+  }
+
+  /**
+   * Reads mask bytes.
+   *
+   * @private
+   */
+  getMask() {
+    if (this._bufferedBytes < 4) {
+      this._loop = false;
+      return;
+    }
+
+    this._mask = this.consume(4);
+    this._state = GET_DATA;
+  }
+
+  /**
+   * Reads data bytes.
+   *
+   * @param {Function} cb Callback
+   * @private
+   */
+  getData(cb) {
+    let data = EMPTY_BUFFER;
+
+    if (this._payloadLength) {
+      if (this._bufferedBytes < this._payloadLength) {
+        this._loop = false;
+        return;
+      }
+
+      data = this.consume(this._payloadLength);
+
+      if (
+        this._masked &&
+        (this._mask[0] | this._mask[1] | this._mask[2] | this._mask[3]) !== 0
+      ) {
+        unmask(data, this._mask);
+      }
+    }
+
+    if (this._opcode > 0x07) {
+      this.controlMessage(data, cb);
+      return;
+    }
+
+    if (this._compressed) {
+      this._state = INFLATING;
+      this.decompress(data, cb);
+      return;
+    }
+
+    if (data.length) {
+      //
+      // This message is not compressed so its length is the sum of the payload
+      // length of all fragments.
+      //
+      this._messageLength = this._totalPayloadLength;
+      this._fragments.push(data);
+    }
+
+    this.dataMessage(cb);
+  }
+
+  /**
+   * Decompresses data.
+   *
+   * @param {Buffer} data Compressed data
+   * @param {Function} cb Callback
+   * @private
+   */
+  decompress(data, cb) {
+    const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName];
+
+    perMessageDeflate.decompress(data, this._fin, (err, buf) => {
+      if (err) return cb(err);
+
+      if (buf.length) {
+        this._messageLength += buf.length;
+        if (this._messageLength > this._maxPayload && this._maxPayload > 0) {
+          const error = this.createError(
+            RangeError,
+            'Max payload size exceeded',
+            false,
+            1009,
+            'WS_ERR_UNSUPPORTED_MESSAGE_LENGTH'
+          );
+
+          cb(error);
+          return;
+        }
+
+        this._fragments.push(buf);
+      }
+
+      this.dataMessage(cb);
+      if (this._state === GET_INFO) this.startLoop(cb);
+    });
+  }
+
+  /**
+   * Handles a data message.
+   *
+   * @param {Function} cb Callback
+   * @private
+   */
+  dataMessage(cb) {
+    if (!this._fin) {
+      this._state = GET_INFO;
+      return;
+    }
+
+    const messageLength = this._messageLength;
+    const fragments = this._fragments;
+
+    this._totalPayloadLength = 0;
+    this._messageLength = 0;
+    this._fragmented = 0;
+    this._fragments = [];
+
+    if (this._opcode === 2) {
+      let data;
+
+      if (this._binaryType === 'nodebuffer') {
+        data = concat(fragments, messageLength);
+      } else if (this._binaryType === 'arraybuffer') {
+        data = toArrayBuffer(concat(fragments, messageLength));
+      } else if (this._binaryType === 'blob') {
+        data = new Blob(fragments);
+      } else {
+        data = fragments;
+      }
+
+      if (this._allowSynchronousEvents) {
+        this.emit('message', data, true);
+        this._state = GET_INFO;
+      } else {
+        this._state = DEFER_EVENT;
+        setImmediate(() => {
+          this.emit('message', data, true);
+          this._state = GET_INFO;
+          this.startLoop(cb);
+        });
+      }
+    } else {
+      const buf = concat(fragments, messageLength);
+
+      if (!this._skipUTF8Validation && !isValidUTF8(buf)) {
+        const error = this.createError(
+          Error,
+          'invalid UTF-8 sequence',
+          true,
+          1007,
+          'WS_ERR_INVALID_UTF8'
+        );
+
+        cb(error);
+        return;
+      }
+
+      if (this._state === INFLATING || this._allowSynchronousEvents) {
+        this.emit('message', buf, false);
+        this._state = GET_INFO;
+      } else {
+        this._state = DEFER_EVENT;
+        setImmediate(() => {
+          this.emit('message', buf, false);
+          this._state = GET_INFO;
+          this.startLoop(cb);
+        });
+      }
+    }
+  }
+
+  /**
+   * Handles a control message.
+   *
+   * @param {Buffer} data Data to handle
+   * @return {(Error|RangeError|undefined)} A possible error
+   * @private
+   */
+  controlMessage(data, cb) {
+    if (this._opcode === 0x08) {
+      if (data.length === 0) {
+        this._loop = false;
+        this.emit('conclude', 1005, EMPTY_BUFFER);
+        this.end();
+      } else {
+        const code = data.readUInt16BE(0);
+
+        if (!isValidStatusCode(code)) {
+          const error = this.createError(
+            RangeError,
+            `invalid status code ${code}`,
+            true,
+            1002,
+            'WS_ERR_INVALID_CLOSE_CODE'
+          );
+
+          cb(error);
+          return;
+        }
+
+        const buf = new FastBuffer(
+          data.buffer,
+          data.byteOffset + 2,
+          data.length - 2
+        );
+
+        if (!this._skipUTF8Validation && !isValidUTF8(buf)) {
+          const error = this.createError(
+            Error,
+            'invalid UTF-8 sequence',
+            true,
+            1007,
+            'WS_ERR_INVALID_UTF8'
+          );
+
+          cb(error);
+          return;
+        }
+
+        this._loop = false;
+        this.emit('conclude', code, buf);
+        this.end();
+      }
+
+      this._state = GET_INFO;
+      return;
+    }
+
+    if (this._allowSynchronousEvents) {
+      this.emit(this._opcode === 0x09 ? 'ping' : 'pong', data);
+      this._state = GET_INFO;
+    } else {
+      this._state = DEFER_EVENT;
+      setImmediate(() => {
+        this.emit(this._opcode === 0x09 ? 'ping' : 'pong', data);
+        this._state = GET_INFO;
+        this.startLoop(cb);
+      });
+    }
+  }
+
+  /**
+   * Builds an error object.
+   *
+   * @param {function(new:Error|RangeError)} ErrorCtor The error constructor
+   * @param {String} message The error message
+   * @param {Boolean} prefix Specifies whether or not to add a default prefix to
+   *     `message`
+   * @param {Number} statusCode The status code
+   * @param {String} errorCode The exposed error code
+   * @return {(Error|RangeError)} The error
+   * @private
+   */
+  createError(ErrorCtor, message, prefix, statusCode, errorCode) {
+    this._loop = false;
+    this._errored = true;
+
+    const err = new ErrorCtor(
+      prefix ? `Invalid WebSocket frame: ${message}` : message
+    );
+
+    Error.captureStackTrace(err, this.createError);
+    err.code = errorCode;
+    err[kStatusCode] = statusCode;
+    return err;
+  }
+}
+
+module.exports = Receiver;
diff --git a/mqtt-backend/node_modules/ws/lib/sender.js b/mqtt-backend/node_modules/ws/lib/sender.js
new file mode 100644
index 0000000..a8b1da3
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/sender.js
@@ -0,0 +1,602 @@
+/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^Duplex" }] */
+
+'use strict';
+
+const { Duplex } = require('stream');
+const { randomFillSync } = require('crypto');
+
+const PerMessageDeflate = require('./permessage-deflate');
+const { EMPTY_BUFFER, kWebSocket, NOOP } = require('./constants');
+const { isBlob, isValidStatusCode } = require('./validation');
+const { mask: applyMask, toBuffer } = require('./buffer-util');
+
+const kByteLength = Symbol('kByteLength');
+const maskBuffer = Buffer.alloc(4);
+const RANDOM_POOL_SIZE = 8 * 1024;
+let randomPool;
+let randomPoolPointer = RANDOM_POOL_SIZE;
+
+const DEFAULT = 0;
+const DEFLATING = 1;
+const GET_BLOB_DATA = 2;
+
+/**
+ * HyBi Sender implementation.
+ */
+class Sender {
+  /**
+   * Creates a Sender instance.
+   *
+   * @param {Duplex} socket The connection socket
+   * @param {Object} [extensions] An object containing the negotiated extensions
+   * @param {Function} [generateMask] The function used to generate the masking
+   *     key
+   */
+  constructor(socket, extensions, generateMask) {
+    this._extensions = extensions || {};
+
+    if (generateMask) {
+      this._generateMask = generateMask;
+      this._maskBuffer = Buffer.alloc(4);
+    }
+
+    this._socket = socket;
+
+    this._firstFragment = true;
+    this._compress = false;
+
+    this._bufferedBytes = 0;
+    this._queue = [];
+    this._state = DEFAULT;
+    this.onerror = NOOP;
+    this[kWebSocket] = undefined;
+  }
+
+  /**
+   * Frames a piece of data according to the HyBi WebSocket protocol.
+   *
+   * @param {(Buffer|String)} data The data to frame
+   * @param {Object} options Options object
+   * @param {Boolean} [options.fin=false] Specifies whether or not to set the
+   *     FIN bit
+   * @param {Function} [options.generateMask] The function used to generate the
+   *     masking key
+   * @param {Boolean} [options.mask=false] Specifies whether or not to mask
+   *     `data`
+   * @param {Buffer} [options.maskBuffer] The buffer used to store the masking
+   *     key
+   * @param {Number} options.opcode The opcode
+   * @param {Boolean} [options.readOnly=false] Specifies whether `data` can be
+   *     modified
+   * @param {Boolean} [options.rsv1=false] Specifies whether or not to set the
+   *     RSV1 bit
+   * @return {(Buffer|String)[]} The framed data
+   * @public
+   */
+  static frame(data, options) {
+    let mask;
+    let merge = false;
+    let offset = 2;
+    let skipMasking = false;
+
+    if (options.mask) {
+      mask = options.maskBuffer || maskBuffer;
+
+      if (options.generateMask) {
+        options.generateMask(mask);
+      } else {
+        if (randomPoolPointer === RANDOM_POOL_SIZE) {
+          /* istanbul ignore else  */
+          if (randomPool === undefined) {
+            //
+            // This is lazily initialized because server-sent frames must not
+            // be masked so it may never be used.
+            //
+            randomPool = Buffer.alloc(RANDOM_POOL_SIZE);
+          }
+
+          randomFillSync(randomPool, 0, RANDOM_POOL_SIZE);
+          randomPoolPointer = 0;
+        }
+
+        mask[0] = randomPool[randomPoolPointer++];
+        mask[1] = randomPool[randomPoolPointer++];
+        mask[2] = randomPool[randomPoolPointer++];
+        mask[3] = randomPool[randomPoolPointer++];
+      }
+
+      skipMasking = (mask[0] | mask[1] | mask[2] | mask[3]) === 0;
+      offset = 6;
+    }
+
+    let dataLength;
+
+    if (typeof data === 'string') {
+      if (
+        (!options.mask || skipMasking) &&
+        options[kByteLength] !== undefined
+      ) {
+        dataLength = options[kByteLength];
+      } else {
+        data = Buffer.from(data);
+        dataLength = data.length;
+      }
+    } else {
+      dataLength = data.length;
+      merge = options.mask && options.readOnly && !skipMasking;
+    }
+
+    let payloadLength = dataLength;
+
+    if (dataLength >= 65536) {
+      offset += 8;
+      payloadLength = 127;
+    } else if (dataLength > 125) {
+      offset += 2;
+      payloadLength = 126;
+    }
+
+    const target = Buffer.allocUnsafe(merge ? dataLength + offset : offset);
+
+    target[0] = options.fin ? options.opcode | 0x80 : options.opcode;
+    if (options.rsv1) target[0] |= 0x40;
+
+    target[1] = payloadLength;
+
+    if (payloadLength === 126) {
+      target.writeUInt16BE(dataLength, 2);
+    } else if (payloadLength === 127) {
+      target[2] = target[3] = 0;
+      target.writeUIntBE(dataLength, 4, 6);
+    }
+
+    if (!options.mask) return [target, data];
+
+    target[1] |= 0x80;
+    target[offset - 4] = mask[0];
+    target[offset - 3] = mask[1];
+    target[offset - 2] = mask[2];
+    target[offset - 1] = mask[3];
+
+    if (skipMasking) return [target, data];
+
+    if (merge) {
+      applyMask(data, mask, target, offset, dataLength);
+      return [target];
+    }
+
+    applyMask(data, mask, data, 0, dataLength);
+    return [target, data];
+  }
+
+  /**
+   * Sends a close message to the other peer.
+   *
+   * @param {Number} [code] The status code component of the body
+   * @param {(String|Buffer)} [data] The message component of the body
+   * @param {Boolean} [mask=false] Specifies whether or not to mask the message
+   * @param {Function} [cb] Callback
+   * @public
+   */
+  close(code, data, mask, cb) {
+    let buf;
+
+    if (code === undefined) {
+      buf = EMPTY_BUFFER;
+    } else if (typeof code !== 'number' || !isValidStatusCode(code)) {
+      throw new TypeError('First argument must be a valid error code number');
+    } else if (data === undefined || !data.length) {
+      buf = Buffer.allocUnsafe(2);
+      buf.writeUInt16BE(code, 0);
+    } else {
+      const length = Buffer.byteLength(data);
+
+      if (length > 123) {
+        throw new RangeError('The message must not be greater than 123 bytes');
+      }
+
+      buf = Buffer.allocUnsafe(2 + length);
+      buf.writeUInt16BE(code, 0);
+
+      if (typeof data === 'string') {
+        buf.write(data, 2);
+      } else {
+        buf.set(data, 2);
+      }
+    }
+
+    const options = {
+      [kByteLength]: buf.length,
+      fin: true,
+      generateMask: this._generateMask,
+      mask,
+      maskBuffer: this._maskBuffer,
+      opcode: 0x08,
+      readOnly: false,
+      rsv1: false
+    };
+
+    if (this._state !== DEFAULT) {
+      this.enqueue([this.dispatch, buf, false, options, cb]);
+    } else {
+      this.sendFrame(Sender.frame(buf, options), cb);
+    }
+  }
+
+  /**
+   * Sends a ping message to the other peer.
+   *
+   * @param {*} data The message to send
+   * @param {Boolean} [mask=false] Specifies whether or not to mask `data`
+   * @param {Function} [cb] Callback
+   * @public
+   */
+  ping(data, mask, cb) {
+    let byteLength;
+    let readOnly;
+
+    if (typeof data === 'string') {
+      byteLength = Buffer.byteLength(data);
+      readOnly = false;
+    } else if (isBlob(data)) {
+      byteLength = data.size;
+      readOnly = false;
+    } else {
+      data = toBuffer(data);
+      byteLength = data.length;
+      readOnly = toBuffer.readOnly;
+    }
+
+    if (byteLength > 125) {
+      throw new RangeError('The data size must not be greater than 125 bytes');
+    }
+
+    const options = {
+      [kByteLength]: byteLength,
+      fin: true,
+      generateMask: this._generateMask,
+      mask,
+      maskBuffer: this._maskBuffer,
+      opcode: 0x09,
+      readOnly,
+      rsv1: false
+    };
+
+    if (isBlob(data)) {
+      if (this._state !== DEFAULT) {
+        this.enqueue([this.getBlobData, data, false, options, cb]);
+      } else {
+        this.getBlobData(data, false, options, cb);
+      }
+    } else if (this._state !== DEFAULT) {
+      this.enqueue([this.dispatch, data, false, options, cb]);
+    } else {
+      this.sendFrame(Sender.frame(data, options), cb);
+    }
+  }
+
+  /**
+   * Sends a pong message to the other peer.
+   *
+   * @param {*} data The message to send
+   * @param {Boolean} [mask=false] Specifies whether or not to mask `data`
+   * @param {Function} [cb] Callback
+   * @public
+   */
+  pong(data, mask, cb) {
+    let byteLength;
+    let readOnly;
+
+    if (typeof data === 'string') {
+      byteLength = Buffer.byteLength(data);
+      readOnly = false;
+    } else if (isBlob(data)) {
+      byteLength = data.size;
+      readOnly = false;
+    } else {
+      data = toBuffer(data);
+      byteLength = data.length;
+      readOnly = toBuffer.readOnly;
+    }
+
+    if (byteLength > 125) {
+      throw new RangeError('The data size must not be greater than 125 bytes');
+    }
+
+    const options = {
+      [kByteLength]: byteLength,
+      fin: true,
+      generateMask: this._generateMask,
+      mask,
+      maskBuffer: this._maskBuffer,
+      opcode: 0x0a,
+      readOnly,
+      rsv1: false
+    };
+
+    if (isBlob(data)) {
+      if (this._state !== DEFAULT) {
+        this.enqueue([this.getBlobData, data, false, options, cb]);
+      } else {
+        this.getBlobData(data, false, options, cb);
+      }
+    } else if (this._state !== DEFAULT) {
+      this.enqueue([this.dispatch, data, false, options, cb]);
+    } else {
+      this.sendFrame(Sender.frame(data, options), cb);
+    }
+  }
+
+  /**
+   * Sends a data message to the other peer.
+   *
+   * @param {*} data The message to send
+   * @param {Object} options Options object
+   * @param {Boolean} [options.binary=false] Specifies whether `data` is binary
+   *     or text
+   * @param {Boolean} [options.compress=false] Specifies whether or not to
+   *     compress `data`
+   * @param {Boolean} [options.fin=false] Specifies whether the fragment is the
+   *     last one
+   * @param {Boolean} [options.mask=false] Specifies whether or not to mask
+   *     `data`
+   * @param {Function} [cb] Callback
+   * @public
+   */
+  send(data, options, cb) {
+    const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName];
+    let opcode = options.binary ? 2 : 1;
+    let rsv1 = options.compress;
+
+    let byteLength;
+    let readOnly;
+
+    if (typeof data === 'string') {
+      byteLength = Buffer.byteLength(data);
+      readOnly = false;
+    } else if (isBlob(data)) {
+      byteLength = data.size;
+      readOnly = false;
+    } else {
+      data = toBuffer(data);
+      byteLength = data.length;
+      readOnly = toBuffer.readOnly;
+    }
+
+    if (this._firstFragment) {
+      this._firstFragment = false;
+      if (
+        rsv1 &&
+        perMessageDeflate &&
+        perMessageDeflate.params[
+          perMessageDeflate._isServer
+            ? 'server_no_context_takeover'
+            : 'client_no_context_takeover'
+        ]
+      ) {
+        rsv1 = byteLength >= perMessageDeflate._threshold;
+      }
+      this._compress = rsv1;
+    } else {
+      rsv1 = false;
+      opcode = 0;
+    }
+
+    if (options.fin) this._firstFragment = true;
+
+    const opts = {
+      [kByteLength]: byteLength,
+      fin: options.fin,
+      generateMask: this._generateMask,
+      mask: options.mask,
+      maskBuffer: this._maskBuffer,
+      opcode,
+      readOnly,
+      rsv1
+    };
+
+    if (isBlob(data)) {
+      if (this._state !== DEFAULT) {
+        this.enqueue([this.getBlobData, data, this._compress, opts, cb]);
+      } else {
+        this.getBlobData(data, this._compress, opts, cb);
+      }
+    } else if (this._state !== DEFAULT) {
+      this.enqueue([this.dispatch, data, this._compress, opts, cb]);
+    } else {
+      this.dispatch(data, this._compress, opts, cb);
+    }
+  }
+
+  /**
+   * Gets the contents of a blob as binary data.
+   *
+   * @param {Blob} blob The blob
+   * @param {Boolean} [compress=false] Specifies whether or not to compress
+   *     the data
+   * @param {Object} options Options object
+   * @param {Boolean} [options.fin=false] Specifies whether or not to set the
+   *     FIN bit
+   * @param {Function} [options.generateMask] The function used to generate the
+   *     masking key
+   * @param {Boolean} [options.mask=false] Specifies whether or not to mask
+   *     `data`
+   * @param {Buffer} [options.maskBuffer] The buffer used to store the masking
+   *     key
+   * @param {Number} options.opcode The opcode
+   * @param {Boolean} [options.readOnly=false] Specifies whether `data` can be
+   *     modified
+   * @param {Boolean} [options.rsv1=false] Specifies whether or not to set the
+   *     RSV1 bit
+   * @param {Function} [cb] Callback
+   * @private
+   */
+  getBlobData(blob, compress, options, cb) {
+    this._bufferedBytes += options[kByteLength];
+    this._state = GET_BLOB_DATA;
+
+    blob
+      .arrayBuffer()
+      .then((arrayBuffer) => {
+        if (this._socket.destroyed) {
+          const err = new Error(
+            'The socket was closed while the blob was being read'
+          );
+
+          //
+          // `callCallbacks` is called in the next tick to ensure that errors
+          // that might be thrown in the callbacks behave like errors thrown
+          // outside the promise chain.
+          //
+          process.nextTick(callCallbacks, this, err, cb);
+          return;
+        }
+
+        this._bufferedBytes -= options[kByteLength];
+        const data = toBuffer(arrayBuffer);
+
+        if (!compress) {
+          this._state = DEFAULT;
+          this.sendFrame(Sender.frame(data, options), cb);
+          this.dequeue();
+        } else {
+          this.dispatch(data, compress, options, cb);
+        }
+      })
+      .catch((err) => {
+        //
+        // `onError` is called in the next tick for the same reason that
+        // `callCallbacks` above is.
+        //
+        process.nextTick(onError, this, err, cb);
+      });
+  }
+
+  /**
+   * Dispatches a message.
+   *
+   * @param {(Buffer|String)} data The message to send
+   * @param {Boolean} [compress=false] Specifies whether or not to compress
+   *     `data`
+   * @param {Object} options Options object
+   * @param {Boolean} [options.fin=false] Specifies whether or not to set the
+   *     FIN bit
+   * @param {Function} [options.generateMask] The function used to generate the
+   *     masking key
+   * @param {Boolean} [options.mask=false] Specifies whether or not to mask
+   *     `data`
+   * @param {Buffer} [options.maskBuffer] The buffer used to store the masking
+   *     key
+   * @param {Number} options.opcode The opcode
+   * @param {Boolean} [options.readOnly=false] Specifies whether `data` can be
+   *     modified
+   * @param {Boolean} [options.rsv1=false] Specifies whether or not to set the
+   *     RSV1 bit
+   * @param {Function} [cb] Callback
+   * @private
+   */
+  dispatch(data, compress, options, cb) {
+    if (!compress) {
+      this.sendFrame(Sender.frame(data, options), cb);
+      return;
+    }
+
+    const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName];
+
+    this._bufferedBytes += options[kByteLength];
+    this._state = DEFLATING;
+    perMessageDeflate.compress(data, options.fin, (_, buf) => {
+      if (this._socket.destroyed) {
+        const err = new Error(
+          'The socket was closed while data was being compressed'
+        );
+
+        callCallbacks(this, err, cb);
+        return;
+      }
+
+      this._bufferedBytes -= options[kByteLength];
+      this._state = DEFAULT;
+      options.readOnly = false;
+      this.sendFrame(Sender.frame(buf, options), cb);
+      this.dequeue();
+    });
+  }
+
+  /**
+   * Executes queued send operations.
+   *
+   * @private
+   */
+  dequeue() {
+    while (this._state === DEFAULT && this._queue.length) {
+      const params = this._queue.shift();
+
+      this._bufferedBytes -= params[3][kByteLength];
+      Reflect.apply(params[0], this, params.slice(1));
+    }
+  }
+
+  /**
+   * Enqueues a send operation.
+   *
+   * @param {Array} params Send operation parameters.
+   * @private
+   */
+  enqueue(params) {
+    this._bufferedBytes += params[3][kByteLength];
+    this._queue.push(params);
+  }
+
+  /**
+   * Sends a frame.
+   *
+   * @param {(Buffer | String)[]} list The frame to send
+   * @param {Function} [cb] Callback
+   * @private
+   */
+  sendFrame(list, cb) {
+    if (list.length === 2) {
+      this._socket.cork();
+      this._socket.write(list[0]);
+      this._socket.write(list[1], cb);
+      this._socket.uncork();
+    } else {
+      this._socket.write(list[0], cb);
+    }
+  }
+}
+
+module.exports = Sender;
+
+/**
+ * Calls queued callbacks with an error.
+ *
+ * @param {Sender} sender The `Sender` instance
+ * @param {Error} err The error to call the callbacks with
+ * @param {Function} [cb] The first callback
+ * @private
+ */
+function callCallbacks(sender, err, cb) {
+  if (typeof cb === 'function') cb(err);
+
+  for (let i = 0; i < sender._queue.length; i++) {
+    const params = sender._queue[i];
+    const callback = params[params.length - 1];
+
+    if (typeof callback === 'function') callback(err);
+  }
+}
+
+/**
+ * Handles a `Sender` error.
+ *
+ * @param {Sender} sender The `Sender` instance
+ * @param {Error} err The error
+ * @param {Function} [cb] The first pending callback
+ * @private
+ */
+function onError(sender, err, cb) {
+  callCallbacks(sender, err, cb);
+  sender.onerror(err);
+}
diff --git a/mqtt-backend/node_modules/ws/lib/stream.js b/mqtt-backend/node_modules/ws/lib/stream.js
new file mode 100644
index 0000000..4c58c91
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/stream.js
@@ -0,0 +1,161 @@
+/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^WebSocket$" }] */
+'use strict';
+
+const WebSocket = require('./websocket');
+const { Duplex } = require('stream');
+
+/**
+ * Emits the `'close'` event on a stream.
+ *
+ * @param {Duplex} stream The stream.
+ * @private
+ */
+function emitClose(stream) {
+  stream.emit('close');
+}
+
+/**
+ * The listener of the `'end'` event.
+ *
+ * @private
+ */
+function duplexOnEnd() {
+  if (!this.destroyed && this._writableState.finished) {
+    this.destroy();
+  }
+}
+
+/**
+ * The listener of the `'error'` event.
+ *
+ * @param {Error} err The error
+ * @private
+ */
+function duplexOnError(err) {
+  this.removeListener('error', duplexOnError);
+  this.destroy();
+  if (this.listenerCount('error') === 0) {
+    // Do not suppress the throwing behavior.
+    this.emit('error', err);
+  }
+}
+
+/**
+ * Wraps a `WebSocket` in a duplex stream.
+ *
+ * @param {WebSocket} ws The `WebSocket` to wrap
+ * @param {Object} [options] The options for the `Duplex` constructor
+ * @return {Duplex} The duplex stream
+ * @public
+ */
+function createWebSocketStream(ws, options) {
+  let terminateOnDestroy = true;
+
+  const duplex = new Duplex({
+    ...options,
+    autoDestroy: false,
+    emitClose: false,
+    objectMode: false,
+    writableObjectMode: false
+  });
+
+  ws.on('message', function message(msg, isBinary) {
+    const data =
+      !isBinary && duplex._readableState.objectMode ? msg.toString() : msg;
+
+    if (!duplex.push(data)) ws.pause();
+  });
+
+  ws.once('error', function error(err) {
+    if (duplex.destroyed) return;
+
+    // Prevent `ws.terminate()` from being called by `duplex._destroy()`.
+    //
+    // - If the `'error'` event is emitted before the `'open'` event, then
+    //   `ws.terminate()` is a noop as no socket is assigned.
+    // - Otherwise, the error is re-emitted by the listener of the `'error'`
+    //   event of the `Receiver` object. The listener already closes the
+    //   connection by calling `ws.close()`. This allows a close frame to be
+    //   sent to the other peer. If `ws.terminate()` is called right after this,
+    //   then the close frame might not be sent.
+    terminateOnDestroy = false;
+    duplex.destroy(err);
+  });
+
+  ws.once('close', function close() {
+    if (duplex.destroyed) return;
+
+    duplex.push(null);
+  });
+
+  duplex._destroy = function (err, callback) {
+    if (ws.readyState === ws.CLOSED) {
+      callback(err);
+      process.nextTick(emitClose, duplex);
+      return;
+    }
+
+    let called = false;
+
+    ws.once('error', function error(err) {
+      called = true;
+      callback(err);
+    });
+
+    ws.once('close', function close() {
+      if (!called) callback(err);
+      process.nextTick(emitClose, duplex);
+    });
+
+    if (terminateOnDestroy) ws.terminate();
+  };
+
+  duplex._final = function (callback) {
+    if (ws.readyState === ws.CONNECTING) {
+      ws.once('open', function open() {
+        duplex._final(callback);
+      });
+      return;
+    }
+
+    // If the value of the `_socket` property is `null` it means that `ws` is a
+    // client websocket and the handshake failed. In fact, when this happens, a
+    // socket is never assigned to the websocket. Wait for the `'error'` event
+    // that will be emitted by the websocket.
+    if (ws._socket === null) return;
+
+    if (ws._socket._writableState.finished) {
+      callback();
+      if (duplex._readableState.endEmitted) duplex.destroy();
+    } else {
+      ws._socket.once('finish', function finish() {
+        // `duplex` is not destroyed here because the `'end'` event will be
+        // emitted on `duplex` after this `'finish'` event. The EOF signaling
+        // `null` chunk is, in fact, pushed when the websocket emits `'close'`.
+        callback();
+      });
+      ws.close();
+    }
+  };
+
+  duplex._read = function () {
+    if (ws.isPaused) ws.resume();
+  };
+
+  duplex._write = function (chunk, encoding, callback) {
+    if (ws.readyState === ws.CONNECTING) {
+      ws.once('open', function open() {
+        duplex._write(chunk, encoding, callback);
+      });
+      return;
+    }
+
+    ws.send(chunk, callback);
+  };
+
+  duplex.on('end', duplexOnEnd);
+  duplex.on('error', duplexOnError);
+  return duplex;
+}
+
+module.exports = createWebSocketStream;
diff --git a/mqtt-backend/node_modules/ws/lib/subprotocol.js b/mqtt-backend/node_modules/ws/lib/subprotocol.js
new file mode 100644
index 0000000..d4381e8
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/subprotocol.js
@@ -0,0 +1,62 @@
+'use strict';
+
+const { tokenChars } = require('./validation');
+
+/**
+ * Parses the `Sec-WebSocket-Protocol` header into a set of subprotocol names.
+ *
+ * @param {String} header The field value of the header
+ * @return {Set} The subprotocol names
+ * @public
+ */
+function parse(header) {
+  const protocols = new Set();
+  let start = -1;
+  let end = -1;
+  let i = 0;
+
+  for (i; i < header.length; i++) {
+    const code = header.charCodeAt(i);
+
+    if (end === -1 && tokenChars[code] === 1) {
+      if (start === -1) start = i;
+    } else if (
+      i !== 0 &&
+      (code === 0x20 /* ' ' */ || code === 0x09) /* '\t' */
+    ) {
+      if (end === -1 && start !== -1) end = i;
+    } else if (code === 0x2c /* ',' */) {
+      if (start === -1) {
+        throw new SyntaxError(`Unexpected character at index ${i}`);
+      }
+
+      if (end === -1) end = i;
+
+      const protocol = header.slice(start, end);
+
+      if (protocols.has(protocol)) {
+        throw new SyntaxError(`The "${protocol}" subprotocol is duplicated`);
+      }
+
+      protocols.add(protocol);
+      start = end = -1;
+    } else {
+      throw new SyntaxError(`Unexpected character at index ${i}`);
+    }
+  }
+
+  if (start === -1 || end !== -1) {
+    throw new SyntaxError('Unexpected end of input');
+  }
+
+  const protocol = header.slice(start, i);
+
+  if (protocols.has(protocol)) {
+    throw new SyntaxError(`The "${protocol}" subprotocol is duplicated`);
+  }
+
+  protocols.add(protocol);
+  return protocols;
+}
+
+module.exports = { parse };
diff --git a/mqtt-backend/node_modules/ws/lib/validation.js b/mqtt-backend/node_modules/ws/lib/validation.js
new file mode 100644
index 0000000..4a2e68d
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/validation.js
@@ -0,0 +1,152 @@
+'use strict';
+
+const { isUtf8 } = require('buffer');
+
+const { hasBlob } = require('./constants');
+
+//
+// Allowed token characters:
+//
+// '!', '#', '$', '%', '&', ''', '*', '+', '-',
+// '.', 0-9, A-Z, '^', '_', '`', a-z, '|', '~'
+//
+// tokenChars[32] === 0 // ' '
+// tokenChars[33] === 1 // '!'
+// tokenChars[34] === 0 // '"'
+// ...
+//
+// prettier-ignore
+const tokenChars = [
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0 - 15
+  0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - 31
+  0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, // 32 - 47
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48 - 63
+  0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64 - 79
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, // 80 - 95
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96 - 111
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0 // 112 - 127
+];
+
+/**
+ * Checks if a status code is allowed in a close frame.
+ *
+ * @param {Number} code The status code
+ * @return {Boolean} `true` if the status code is valid, else `false`
+ * @public
+ */
+function isValidStatusCode(code) {
+  return (
+    (code >= 1000 &&
+      code <= 1014 &&
+      code !== 1004 &&
+      code !== 1005 &&
+      code !== 1006) ||
+    (code >= 3000 && code <= 4999)
+  );
+}
+
+/**
+ * Checks if a given buffer contains only correct UTF-8.
+ * Ported from https://www.cl.cam.ac.uk/%7Emgk25/ucs/utf8_check.c by
+ * Markus Kuhn.
+ *
+ * @param {Buffer} buf The buffer to check
+ * @return {Boolean} `true` if `buf` contains only correct UTF-8, else `false`
+ * @public
+ */
+function _isValidUTF8(buf) {
+  const len = buf.length;
+  let i = 0;
+
+  while (i < len) {
+    if ((buf[i] & 0x80) === 0) {
+      // 0xxxxxxx
+      i++;
+    } else if ((buf[i] & 0xe0) === 0xc0) {
+      // 110xxxxx 10xxxxxx
+      if (
+        i + 1 === len ||
+        (buf[i + 1] & 0xc0) !== 0x80 ||
+        (buf[i] & 0xfe) === 0xc0 // Overlong
+      ) {
+        return false;
+      }
+
+      i += 2;
+    } else if ((buf[i] & 0xf0) === 0xe0) {
+      // 1110xxxx 10xxxxxx 10xxxxxx
+      if (
+        i + 2 >= len ||
+        (buf[i + 1] & 0xc0) !== 0x80 ||
+        (buf[i + 2] & 0xc0) !== 0x80 ||
+        (buf[i] === 0xe0 && (buf[i + 1] & 0xe0) === 0x80) || // Overlong
+        (buf[i] === 0xed && (buf[i + 1] & 0xe0) === 0xa0) // Surrogate (U+D800 - U+DFFF)
+      ) {
+        return false;
+      }
+
+      i += 3;
+    } else if ((buf[i] & 0xf8) === 0xf0) {
+      // 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+      if (
+        i + 3 >= len ||
+        (buf[i + 1] & 0xc0) !== 0x80 ||
+        (buf[i + 2] & 0xc0) !== 0x80 ||
+        (buf[i + 3] & 0xc0) !== 0x80 ||
+        (buf[i] === 0xf0 && (buf[i + 1] & 0xf0) === 0x80) || // Overlong
+        (buf[i] === 0xf4 && buf[i + 1] > 0x8f) ||
+        buf[i] > 0xf4 // > U+10FFFF
+      ) {
+        return false;
+      }
+
+      i += 4;
+    } else {
+      return false;
+    }
+  }
+
+  return true;
+}
+
+/**
+ * Determines whether a value is a `Blob`.
+ *
+ * @param {*} value The value to be tested
+ * @return {Boolean} `true` if `value` is a `Blob`, else `false`
+ * @private
+ */
+function isBlob(value) {
+  return (
+    hasBlob &&
+    typeof value === 'object' &&
+    typeof value.arrayBuffer === 'function' &&
+    typeof value.type === 'string' &&
+    typeof value.stream === 'function' &&
+    (value[Symbol.toStringTag] === 'Blob' ||
+      value[Symbol.toStringTag] === 'File')
+  );
+}
+
+module.exports = {
+  isBlob,
+  isValidStatusCode,
+  isValidUTF8: _isValidUTF8,
+  tokenChars
+};
+
+if (isUtf8) {
+  module.exports.isValidUTF8 = function (buf) {
+    return buf.length < 24 ? _isValidUTF8(buf) : isUtf8(buf);
+  };
+} /* istanbul ignore else  */ else if (!process.env.WS_NO_UTF_8_VALIDATE) {
+  try {
+    const isValidUTF8 = require('utf-8-validate');
+
+    module.exports.isValidUTF8 = function (buf) {
+      return buf.length < 32 ? _isValidUTF8(buf) : isValidUTF8(buf);
+    };
+  } catch (e) {
+    // Continue regardless of the error.
+  }
+}
diff --git a/mqtt-backend/node_modules/ws/lib/websocket-server.js b/mqtt-backend/node_modules/ws/lib/websocket-server.js
new file mode 100644
index 0000000..68aa789
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/websocket-server.js
@@ -0,0 +1,554 @@
+/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^Duplex$", "caughtErrors": "none" }] */
+
+'use strict';
+
+const EventEmitter = require('events');
+const http = require('http');
+const { Duplex } = require('stream');
+const { createHash } = require('crypto');
+
+const extension = require('./extension');
+const PerMessageDeflate = require('./permessage-deflate');
+const subprotocol = require('./subprotocol');
+const WebSocket = require('./websocket');
+const { CLOSE_TIMEOUT, GUID, kWebSocket } = require('./constants');
+
+const keyRegex = /^[+/0-9A-Za-z]{22}==$/;
+
+const RUNNING = 0;
+const CLOSING = 1;
+const CLOSED = 2;
+
+/**
+ * Class representing a WebSocket server.
+ *
+ * @extends EventEmitter
+ */
+class WebSocketServer extends EventEmitter {
+  /**
+   * Create a `WebSocketServer` instance.
+   *
+   * @param {Object} options Configuration options
+   * @param {Boolean} [options.allowSynchronousEvents=true] Specifies whether
+   *     any of the `'message'`, `'ping'`, and `'pong'` events can be emitted
+   *     multiple times in the same tick
+   * @param {Boolean} [options.autoPong=true] Specifies whether or not to
+   *     automatically send a pong in response to a ping
+   * @param {Number} [options.backlog=511] The maximum length of the queue of
+   *     pending connections
+   * @param {Boolean} [options.clientTracking=true] Specifies whether or not to
+   *     track clients
+   * @param {Number} [options.closeTimeout=30000] Duration in milliseconds to
+   *     wait for the closing handshake to finish after `websocket.close()` is
+   *     called
+   * @param {Function} [options.handleProtocols] A hook to handle protocols
+   * @param {String} [options.host] The hostname where to bind the server
+   * @param {Number} [options.maxPayload=104857600] The maximum allowed message
+   *     size
+   * @param {Boolean} [options.noServer=false] Enable no server mode
+   * @param {String} [options.path] Accept only connections matching this path
+   * @param {(Boolean|Object)} [options.perMessageDeflate=false] Enable/disable
+   *     permessage-deflate
+   * @param {Number} [options.port] The port where to bind the server
+   * @param {(http.Server|https.Server)} [options.server] A pre-created HTTP/S
+   *     server to use
+   * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or
+   *     not to skip UTF-8 validation for text and close messages
+   * @param {Function} [options.verifyClient] A hook to reject connections
+   * @param {Function} [options.WebSocket=WebSocket] Specifies the `WebSocket`
+   *     class to use. It must be the `WebSocket` class or class that extends it
+   * @param {Function} [callback] A listener for the `listening` event
+   */
+  constructor(options, callback) {
+    super();
+
+    options = {
+      allowSynchronousEvents: true,
+      autoPong: true,
+      maxPayload: 100 * 1024 * 1024,
+      skipUTF8Validation: false,
+      perMessageDeflate: false,
+      handleProtocols: null,
+      clientTracking: true,
+      closeTimeout: CLOSE_TIMEOUT,
+      verifyClient: null,
+      noServer: false,
+      backlog: null, // use default (511 as implemented in net.js)
+      server: null,
+      host: null,
+      path: null,
+      port: null,
+      WebSocket,
+      ...options
+    };
+
+    if (
+      (options.port == null && !options.server && !options.noServer) ||
+      (options.port != null && (options.server || options.noServer)) ||
+      (options.server && options.noServer)
+    ) {
+      throw new TypeError(
+        'One and only one of the "port", "server", or "noServer" options ' +
+          'must be specified'
+      );
+    }
+
+    if (options.port != null) {
+      this._server = http.createServer((req, res) => {
+        const body = http.STATUS_CODES[426];
+
+        res.writeHead(426, {
+          'Content-Length': body.length,
+          'Content-Type': 'text/plain'
+        });
+        res.end(body);
+      });
+      this._server.listen(
+        options.port,
+        options.host,
+        options.backlog,
+        callback
+      );
+    } else if (options.server) {
+      this._server = options.server;
+    }
+
+    if (this._server) {
+      const emitConnection = this.emit.bind(this, 'connection');
+
+      this._removeListeners = addListeners(this._server, {
+        listening: this.emit.bind(this, 'listening'),
+        error: this.emit.bind(this, 'error'),
+        upgrade: (req, socket, head) => {
+          this.handleUpgrade(req, socket, head, emitConnection);
+        }
+      });
+    }
+
+    if (options.perMessageDeflate === true) options.perMessageDeflate = {};
+    if (options.clientTracking) {
+      this.clients = new Set();
+      this._shouldEmitClose = false;
+    }
+
+    this.options = options;
+    this._state = RUNNING;
+  }
+
+  /**
+   * Returns the bound address, the address family name, and port of the server
+   * as reported by the operating system if listening on an IP socket.
+   * If the server is listening on a pipe or UNIX domain socket, the name is
+   * returned as a string.
+   *
+   * @return {(Object|String|null)} The address of the server
+   * @public
+   */
+  address() {
+    if (this.options.noServer) {
+      throw new Error('The server is operating in "noServer" mode');
+    }
+
+    if (!this._server) return null;
+    return this._server.address();
+  }
+
+  /**
+   * Stop the server from accepting new connections and emit the `'close'` event
+   * when all existing connections are closed.
+   *
+   * @param {Function} [cb] A one-time listener for the `'close'` event
+   * @public
+   */
+  close(cb) {
+    if (this._state === CLOSED) {
+      if (cb) {
+        this.once('close', () => {
+          cb(new Error('The server is not running'));
+        });
+      }
+
+      process.nextTick(emitClose, this);
+      return;
+    }
+
+    if (cb) this.once('close', cb);
+
+    if (this._state === CLOSING) return;
+    this._state = CLOSING;
+
+    if (this.options.noServer || this.options.server) {
+      if (this._server) {
+        this._removeListeners();
+        this._removeListeners = this._server = null;
+      }
+
+      if (this.clients) {
+        if (!this.clients.size) {
+          process.nextTick(emitClose, this);
+        } else {
+          this._shouldEmitClose = true;
+        }
+      } else {
+        process.nextTick(emitClose, this);
+      }
+    } else {
+      const server = this._server;
+
+      this._removeListeners();
+      this._removeListeners = this._server = null;
+
+      //
+      // The HTTP/S server was created internally. Close it, and rely on its
+      // `'close'` event.
+      //
+      server.close(() => {
+        emitClose(this);
+      });
+    }
+  }
+
+  /**
+   * See if a given request should be handled by this server instance.
+   *
+   * @param {http.IncomingMessage} req Request object to inspect
+   * @return {Boolean} `true` if the request is valid, else `false`
+   * @public
+   */
+  shouldHandle(req) {
+    if (this.options.path) {
+      const index = req.url.indexOf('?');
+      const pathname = index !== -1 ? req.url.slice(0, index) : req.url;
+
+      if (pathname !== this.options.path) return false;
+    }
+
+    return true;
+  }
+
+  /**
+   * Handle a HTTP Upgrade request.
+   *
+   * @param {http.IncomingMessage} req The request object
+   * @param {Duplex} socket The network socket between the server and client
+   * @param {Buffer} head The first packet of the upgraded stream
+   * @param {Function} cb Callback
+   * @public
+   */
+  handleUpgrade(req, socket, head, cb) {
+    socket.on('error', socketOnError);
+
+    const key = req.headers['sec-websocket-key'];
+    const upgrade = req.headers.upgrade;
+    const version = +req.headers['sec-websocket-version'];
+
+    if (req.method !== 'GET') {
+      const message = 'Invalid HTTP method';
+      abortHandshakeOrEmitwsClientError(this, req, socket, 405, message);
+      return;
+    }
+
+    if (upgrade === undefined || upgrade.toLowerCase() !== 'websocket') {
+      const message = 'Invalid Upgrade header';
+      abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
+      return;
+    }
+
+    if (key === undefined || !keyRegex.test(key)) {
+      const message = 'Missing or invalid Sec-WebSocket-Key header';
+      abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
+      return;
+    }
+
+    if (version !== 13 && version !== 8) {
+      const message = 'Missing or invalid Sec-WebSocket-Version header';
+      abortHandshakeOrEmitwsClientError(this, req, socket, 400, message, {
+        'Sec-WebSocket-Version': '13, 8'
+      });
+      return;
+    }
+
+    if (!this.shouldHandle(req)) {
+      abortHandshake(socket, 400);
+      return;
+    }
+
+    const secWebSocketProtocol = req.headers['sec-websocket-protocol'];
+    let protocols = new Set();
+
+    if (secWebSocketProtocol !== undefined) {
+      try {
+        protocols = subprotocol.parse(secWebSocketProtocol);
+      } catch (err) {
+        const message = 'Invalid Sec-WebSocket-Protocol header';
+        abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
+        return;
+      }
+    }
+
+    const secWebSocketExtensions = req.headers['sec-websocket-extensions'];
+    const extensions = {};
+
+    if (
+      this.options.perMessageDeflate &&
+      secWebSocketExtensions !== undefined
+    ) {
+      const perMessageDeflate = new PerMessageDeflate({
+        ...this.options.perMessageDeflate,
+        isServer: true,
+        maxPayload: this.options.maxPayload
+      });
+
+      try {
+        const offers = extension.parse(secWebSocketExtensions);
+
+        if (offers[PerMessageDeflate.extensionName]) {
+          perMessageDeflate.accept(offers[PerMessageDeflate.extensionName]);
+          extensions[PerMessageDeflate.extensionName] = perMessageDeflate;
+        }
+      } catch (err) {
+        const message =
+          'Invalid or unacceptable Sec-WebSocket-Extensions header';
+        abortHandshakeOrEmitwsClientError(this, req, socket, 400, message);
+        return;
+      }
+    }
+
+    //
+    // Optionally call external client verification handler.
+    //
+    if (this.options.verifyClient) {
+      const info = {
+        origin:
+          req.headers[`${version === 8 ? 'sec-websocket-origin' : 'origin'}`],
+        secure: !!(req.socket.authorized || req.socket.encrypted),
+        req
+      };
+
+      if (this.options.verifyClient.length === 2) {
+        this.options.verifyClient(info, (verified, code, message, headers) => {
+          if (!verified) {
+            return abortHandshake(socket, code || 401, message, headers);
+          }
+
+          this.completeUpgrade(
+            extensions,
+            key,
+            protocols,
+            req,
+            socket,
+            head,
+            cb
+          );
+        });
+        return;
+      }
+
+      if (!this.options.verifyClient(info)) return abortHandshake(socket, 401);
+    }
+
+    this.completeUpgrade(extensions, key, protocols, req, socket, head, cb);
+  }
+
+  /**
+   * Upgrade the connection to WebSocket.
+   *
+   * @param {Object} extensions The accepted extensions
+   * @param {String} key The value of the `Sec-WebSocket-Key` header
+   * @param {Set} protocols The subprotocols
+   * @param {http.IncomingMessage} req The request object
+   * @param {Duplex} socket The network socket between the server and client
+   * @param {Buffer} head The first packet of the upgraded stream
+   * @param {Function} cb Callback
+   * @throws {Error} If called more than once with the same socket
+   * @private
+   */
+  completeUpgrade(extensions, key, protocols, req, socket, head, cb) {
+    //
+    // Destroy the socket if the client has already sent a FIN packet.
+    //
+    if (!socket.readable || !socket.writable) return socket.destroy();
+
+    if (socket[kWebSocket]) {
+      throw new Error(
+        'server.handleUpgrade() was called more than once with the same ' +
+          'socket, possibly due to a misconfiguration'
+      );
+    }
+
+    if (this._state > RUNNING) return abortHandshake(socket, 503);
+
+    const digest = createHash('sha1')
+      .update(key + GUID)
+      .digest('base64');
+
+    const headers = [
+      'HTTP/1.1 101 Switching Protocols',
+      'Upgrade: websocket',
+      'Connection: Upgrade',
+      `Sec-WebSocket-Accept: ${digest}`
+    ];
+
+    const ws = new this.options.WebSocket(null, undefined, this.options);
+
+    if (protocols.size) {
+      //
+      // Optionally call external protocol selection handler.
+      //
+      const protocol = this.options.handleProtocols
+        ? this.options.handleProtocols(protocols, req)
+        : protocols.values().next().value;
+
+      if (protocol) {
+        headers.push(`Sec-WebSocket-Protocol: ${protocol}`);
+        ws._protocol = protocol;
+      }
+    }
+
+    if (extensions[PerMessageDeflate.extensionName]) {
+      const params = extensions[PerMessageDeflate.extensionName].params;
+      const value = extension.format({
+        [PerMessageDeflate.extensionName]: [params]
+      });
+      headers.push(`Sec-WebSocket-Extensions: ${value}`);
+      ws._extensions = extensions;
+    }
+
+    //
+    // Allow external modification/inspection of handshake headers.
+    //
+    this.emit('headers', headers, req);
+
+    socket.write(headers.concat('\r\n').join('\r\n'));
+    socket.removeListener('error', socketOnError);
+
+    ws.setSocket(socket, head, {
+      allowSynchronousEvents: this.options.allowSynchronousEvents,
+      maxPayload: this.options.maxPayload,
+      skipUTF8Validation: this.options.skipUTF8Validation
+    });
+
+    if (this.clients) {
+      this.clients.add(ws);
+      ws.on('close', () => {
+        this.clients.delete(ws);
+
+        if (this._shouldEmitClose && !this.clients.size) {
+          process.nextTick(emitClose, this);
+        }
+      });
+    }
+
+    cb(ws, req);
+  }
+}
+
+module.exports = WebSocketServer;
+
+/**
+ * Add event listeners on an `EventEmitter` using a map of <event, listener>
+ * pairs.
+ *
+ * @param {EventEmitter} server The event emitter
+ * @param {Object.<String, Function>} map The listeners to add
+ * @return {Function} A function that will remove the added listeners when
+ *     called
+ * @private
+ */
+function addListeners(server, map) {
+  for (const event of Object.keys(map)) server.on(event, map[event]);
+
+  return function removeListeners() {
+    for (const event of Object.keys(map)) {
+      server.removeListener(event, map[event]);
+    }
+  };
+}
+
+/**
+ * Emit a `'close'` event on an `EventEmitter`.
+ *
+ * @param {EventEmitter} server The event emitter
+ * @private
+ */
+function emitClose(server) {
+  server._state = CLOSED;
+  server.emit('close');
+}
+
+/**
+ * Handle socket errors.
+ *
+ * @private
+ */
+function socketOnError() {
+  this.destroy();
+}
+
+/**
+ * Close the connection when preconditions are not fulfilled.
+ *
+ * @param {Duplex} socket The socket of the upgrade request
+ * @param {Number} code The HTTP response status code
+ * @param {String} [message] The HTTP response body
+ * @param {Object} [headers] Additional HTTP response headers
+ * @private
+ */
+function abortHandshake(socket, code, message, headers) {
+  //
+  // The socket is writable unless the user destroyed or ended it before calling
+  // `server.handleUpgrade()` or in the `verifyClient` function, which is a user
+  // error. Handling this does not make much sense as the worst that can happen
+  // is that some of the data written by the user might be discarded due to the
+  // call to `socket.end()` below, which triggers an `'error'` event that in
+  // turn causes the socket to be destroyed.
+  //
+  message = message || http.STATUS_CODES[code];
+  headers = {
+    Connection: 'close',
+    'Content-Type': 'text/html',
+    'Content-Length': Buffer.byteLength(message),
+    ...headers
+  };
+
+  socket.once('finish', socket.destroy);
+
+  socket.end(
+    `HTTP/1.1 ${code} ${http.STATUS_CODES[code]}\r\n` +
+      Object.keys(headers)
+        .map((h) => `${h}: ${headers[h]}`)
+        .join('\r\n') +
+      '\r\n\r\n' +
+      message
+  );
+}
+
+/**
+ * Emit a `'wsClientError'` event on a `WebSocketServer` if there is at least
+ * one listener for it, otherwise call `abortHandshake()`.
+ *
+ * @param {WebSocketServer} server The WebSocket server
+ * @param {http.IncomingMessage} req The request object
+ * @param {Duplex} socket The socket of the upgrade request
+ * @param {Number} code The HTTP response status code
+ * @param {String} message The HTTP response body
+ * @param {Object} [headers] The HTTP response headers
+ * @private
+ */
+function abortHandshakeOrEmitwsClientError(
+  server,
+  req,
+  socket,
+  code,
+  message,
+  headers
+) {
+  if (server.listenerCount('wsClientError')) {
+    const err = new Error(message);
+    Error.captureStackTrace(err, abortHandshakeOrEmitwsClientError);
+
+    server.emit('wsClientError', err, socket, req);
+  } else {
+    abortHandshake(socket, code, message, headers);
+  }
+}
diff --git a/mqtt-backend/node_modules/ws/lib/websocket.js b/mqtt-backend/node_modules/ws/lib/websocket.js
new file mode 100644
index 0000000..75d5bb2
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/lib/websocket.js
@@ -0,0 +1,1393 @@
+/* eslint no-unused-vars: ["error", { "varsIgnorePattern": "^Duplex|Readable$", "caughtErrors": "none" }] */
+
+'use strict';
+
+const EventEmitter = require('events');
+const https = require('https');
+const http = require('http');
+const net = require('net');
+const tls = require('tls');
+const { randomBytes, createHash } = require('crypto');
+const { Duplex, Readable } = require('stream');
+const { URL } = require('url');
+
+const PerMessageDeflate = require('./permessage-deflate');
+const Receiver = require('./receiver');
+const Sender = require('./sender');
+const { isBlob } = require('./validation');
+
+const {
+  BINARY_TYPES,
+  CLOSE_TIMEOUT,
+  EMPTY_BUFFER,
+  GUID,
+  kForOnEventAttribute,
+  kListener,
+  kStatusCode,
+  kWebSocket,
+  NOOP
+} = require('./constants');
+const {
+  EventTarget: { addEventListener, removeEventListener }
+} = require('./event-target');
+const { format, parse } = require('./extension');
+const { toBuffer } = require('./buffer-util');
+
+const kAborted = Symbol('kAborted');
+const protocolVersions = [8, 13];
+const readyStates = ['CONNECTING', 'OPEN', 'CLOSING', 'CLOSED'];
+const subprotocolRegex = /^[!#$%&'*+\-.0-9A-Z^_`|a-z~]+$/;
+
+/**
+ * Class representing a WebSocket.
+ *
+ * @extends EventEmitter
+ */
+class WebSocket extends EventEmitter {
+  /**
+   * Create a new `WebSocket`.
+   *
+   * @param {(String|URL)} address The URL to which to connect
+   * @param {(String|String[])} [protocols] The subprotocols
+   * @param {Object} [options] Connection options
+   */
+  constructor(address, protocols, options) {
+    super();
+
+    this._binaryType = BINARY_TYPES[0];
+    this._closeCode = 1006;
+    this._closeFrameReceived = false;
+    this._closeFrameSent = false;
+    this._closeMessage = EMPTY_BUFFER;
+    this._closeTimer = null;
+    this._errorEmitted = false;
+    this._extensions = {};
+    this._paused = false;
+    this._protocol = '';
+    this._readyState = WebSocket.CONNECTING;
+    this._receiver = null;
+    this._sender = null;
+    this._socket = null;
+
+    if (address !== null) {
+      this._bufferedAmount = 0;
+      this._isServer = false;
+      this._redirects = 0;
+
+      if (protocols === undefined) {
+        protocols = [];
+      } else if (!Array.isArray(protocols)) {
+        if (typeof protocols === 'object' && protocols !== null) {
+          options = protocols;
+          protocols = [];
+        } else {
+          protocols = [protocols];
+        }
+      }
+
+      initAsClient(this, address, protocols, options);
+    } else {
+      this._autoPong = options.autoPong;
+      this._closeTimeout = options.closeTimeout;
+      this._isServer = true;
+    }
+  }
+
+  /**
+   * For historical reasons, the custom "nodebuffer" type is used by the default
+   * instead of "blob".
+   *
+   * @type {String}
+   */
+  get binaryType() {
+    return this._binaryType;
+  }
+
+  set binaryType(type) {
+    if (!BINARY_TYPES.includes(type)) return;
+
+    this._binaryType = type;
+
+    //
+    // Allow to change `binaryType` on the fly.
+    //
+    if (this._receiver) this._receiver._binaryType = type;
+  }
+
+  /**
+   * @type {Number}
+   */
+  get bufferedAmount() {
+    if (!this._socket) return this._bufferedAmount;
+
+    return this._socket._writableState.length + this._sender._bufferedBytes;
+  }
+
+  /**
+   * @type {String}
+   */
+  get extensions() {
+    return Object.keys(this._extensions).join();
+  }
+
+  /**
+   * @type {Boolean}
+   */
+  get isPaused() {
+    return this._paused;
+  }
+
+  /**
+   * @type {Function}
+   */
+  /* istanbul ignore next */
+  get onclose() {
+    return null;
+  }
+
+  /**
+   * @type {Function}
+   */
+  /* istanbul ignore next */
+  get onerror() {
+    return null;
+  }
+
+  /**
+   * @type {Function}
+   */
+  /* istanbul ignore next */
+  get onopen() {
+    return null;
+  }
+
+  /**
+   * @type {Function}
+   */
+  /* istanbul ignore next */
+  get onmessage() {
+    return null;
+  }
+
+  /**
+   * @type {String}
+   */
+  get protocol() {
+    return this._protocol;
+  }
+
+  /**
+   * @type {Number}
+   */
+  get readyState() {
+    return this._readyState;
+  }
+
+  /**
+   * @type {String}
+   */
+  get url() {
+    return this._url;
+  }
+
+  /**
+   * Set up the socket and the internal resources.
+   *
+   * @param {Duplex} socket The network socket between the server and client
+   * @param {Buffer} head The first packet of the upgraded stream
+   * @param {Object} options Options object
+   * @param {Boolean} [options.allowSynchronousEvents=false] Specifies whether
+   *     any of the `'message'`, `'ping'`, and `'pong'` events can be emitted
+   *     multiple times in the same tick
+   * @param {Function} [options.generateMask] The function used to generate the
+   *     masking key
+   * @param {Number} [options.maxPayload=0] The maximum allowed message size
+   * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or
+   *     not to skip UTF-8 validation for text and close messages
+   * @private
+   */
+  setSocket(socket, head, options) {
+    const receiver = new Receiver({
+      allowSynchronousEvents: options.allowSynchronousEvents,
+      binaryType: this.binaryType,
+      extensions: this._extensions,
+      isServer: this._isServer,
+      maxPayload: options.maxPayload,
+      skipUTF8Validation: options.skipUTF8Validation
+    });
+
+    const sender = new Sender(socket, this._extensions, options.generateMask);
+
+    this._receiver = receiver;
+    this._sender = sender;
+    this._socket = socket;
+
+    receiver[kWebSocket] = this;
+    sender[kWebSocket] = this;
+    socket[kWebSocket] = this;
+
+    receiver.on('conclude', receiverOnConclude);
+    receiver.on('drain', receiverOnDrain);
+    receiver.on('error', receiverOnError);
+    receiver.on('message', receiverOnMessage);
+    receiver.on('ping', receiverOnPing);
+    receiver.on('pong', receiverOnPong);
+
+    sender.onerror = senderOnError;
+
+    //
+    // These methods may not be available if `socket` is just a `Duplex`.
+    //
+    if (socket.setTimeout) socket.setTimeout(0);
+    if (socket.setNoDelay) socket.setNoDelay();
+
+    if (head.length > 0) socket.unshift(head);
+
+    socket.on('close', socketOnClose);
+    socket.on('data', socketOnData);
+    socket.on('end', socketOnEnd);
+    socket.on('error', socketOnError);
+
+    this._readyState = WebSocket.OPEN;
+    this.emit('open');
+  }
+
+  /**
+   * Emit the `'close'` event.
+   *
+   * @private
+   */
+  emitClose() {
+    if (!this._socket) {
+      this._readyState = WebSocket.CLOSED;
+      this.emit('close', this._closeCode, this._closeMessage);
+      return;
+    }
+
+    if (this._extensions[PerMessageDeflate.extensionName]) {
+      this._extensions[PerMessageDeflate.extensionName].cleanup();
+    }
+
+    this._receiver.removeAllListeners();
+    this._readyState = WebSocket.CLOSED;
+    this.emit('close', this._closeCode, this._closeMessage);
+  }
+
+  /**
+   * Start a closing handshake.
+   *
+   *          +----------+   +-----------+   +----------+
+   *     - - -|ws.close()|-->|close frame|-->|ws.close()|- - -
+   *    |     +----------+   +-----------+   +----------+     |
+   *          +----------+   +-----------+         |
+   * CLOSING  |ws.close()|<--|close frame|<--+-----+       CLOSING
+   *          +----------+   +-----------+   |
+   *    |           |                        |   +---+        |
+   *                +------------------------+-->|fin| - - - -
+   *    |         +---+                      |   +---+
+   *     - - - - -|fin|<---------------------+
+   *              +---+
+   *
+   * @param {Number} [code] Status code explaining why the connection is closing
+   * @param {(String|Buffer)} [data] The reason why the connection is
+   *     closing
+   * @public
+   */
+  close(code, data) {
+    if (this.readyState === WebSocket.CLOSED) return;
+    if (this.readyState === WebSocket.CONNECTING) {
+      const msg = 'WebSocket was closed before the connection was established';
+      abortHandshake(this, this._req, msg);
+      return;
+    }
+
+    if (this.readyState === WebSocket.CLOSING) {
+      if (
+        this._closeFrameSent &&
+        (this._closeFrameReceived || this._receiver._writableState.errorEmitted)
+      ) {
+        this._socket.end();
+      }
+
+      return;
+    }
+
+    this._readyState = WebSocket.CLOSING;
+    this._sender.close(code, data, !this._isServer, (err) => {
+      //
+      // This error is handled by the `'error'` listener on the socket. We only
+      // want to know if the close frame has been sent here.
+      //
+      if (err) return;
+
+      this._closeFrameSent = true;
+
+      if (
+        this._closeFrameReceived ||
+        this._receiver._writableState.errorEmitted
+      ) {
+        this._socket.end();
+      }
+    });
+
+    setCloseTimer(this);
+  }
+
+  /**
+   * Pause the socket.
+   *
+   * @public
+   */
+  pause() {
+    if (
+      this.readyState === WebSocket.CONNECTING ||
+      this.readyState === WebSocket.CLOSED
+    ) {
+      return;
+    }
+
+    this._paused = true;
+    this._socket.pause();
+  }
+
+  /**
+   * Send a ping.
+   *
+   * @param {*} [data] The data to send
+   * @param {Boolean} [mask] Indicates whether or not to mask `data`
+   * @param {Function} [cb] Callback which is executed when the ping is sent
+   * @public
+   */
+  ping(data, mask, cb) {
+    if (this.readyState === WebSocket.CONNECTING) {
+      throw new Error('WebSocket is not open: readyState 0 (CONNECTING)');
+    }
+
+    if (typeof data === 'function') {
+      cb = data;
+      data = mask = undefined;
+    } else if (typeof mask === 'function') {
+      cb = mask;
+      mask = undefined;
+    }
+
+    if (typeof data === 'number') data = data.toString();
+
+    if (this.readyState !== WebSocket.OPEN) {
+      sendAfterClose(this, data, cb);
+      return;
+    }
+
+    if (mask === undefined) mask = !this._isServer;
+    this._sender.ping(data || EMPTY_BUFFER, mask, cb);
+  }
+
+  /**
+   * Send a pong.
+   *
+   * @param {*} [data] The data to send
+   * @param {Boolean} [mask] Indicates whether or not to mask `data`
+   * @param {Function} [cb] Callback which is executed when the pong is sent
+   * @public
+   */
+  pong(data, mask, cb) {
+    if (this.readyState === WebSocket.CONNECTING) {
+      throw new Error('WebSocket is not open: readyState 0 (CONNECTING)');
+    }
+
+    if (typeof data === 'function') {
+      cb = data;
+      data = mask = undefined;
+    } else if (typeof mask === 'function') {
+      cb = mask;
+      mask = undefined;
+    }
+
+    if (typeof data === 'number') data = data.toString();
+
+    if (this.readyState !== WebSocket.OPEN) {
+      sendAfterClose(this, data, cb);
+      return;
+    }
+
+    if (mask === undefined) mask = !this._isServer;
+    this._sender.pong(data || EMPTY_BUFFER, mask, cb);
+  }
+
+  /**
+   * Resume the socket.
+   *
+   * @public
+   */
+  resume() {
+    if (
+      this.readyState === WebSocket.CONNECTING ||
+      this.readyState === WebSocket.CLOSED
+    ) {
+      return;
+    }
+
+    this._paused = false;
+    if (!this._receiver._writableState.needDrain) this._socket.resume();
+  }
+
+  /**
+   * Send a data message.
+   *
+   * @param {*} data The message to send
+   * @param {Object} [options] Options object
+   * @param {Boolean} [options.binary] Specifies whether `data` is binary or
+   *     text
+   * @param {Boolean} [options.compress] Specifies whether or not to compress
+   *     `data`
+   * @param {Boolean} [options.fin=true] Specifies whether the fragment is the
+   *     last one
+   * @param {Boolean} [options.mask] Specifies whether or not to mask `data`
+   * @param {Function} [cb] Callback which is executed when data is written out
+   * @public
+   */
+  send(data, options, cb) {
+    if (this.readyState === WebSocket.CONNECTING) {
+      throw new Error('WebSocket is not open: readyState 0 (CONNECTING)');
+    }
+
+    if (typeof options === 'function') {
+      cb = options;
+      options = {};
+    }
+
+    if (typeof data === 'number') data = data.toString();
+
+    if (this.readyState !== WebSocket.OPEN) {
+      sendAfterClose(this, data, cb);
+      return;
+    }
+
+    const opts = {
+      binary: typeof data !== 'string',
+      mask: !this._isServer,
+      compress: true,
+      fin: true,
+      ...options
+    };
+
+    if (!this._extensions[PerMessageDeflate.extensionName]) {
+      opts.compress = false;
+    }
+
+    this._sender.send(data || EMPTY_BUFFER, opts, cb);
+  }
+
+  /**
+   * Forcibly close the connection.
+   *
+   * @public
+   */
+  terminate() {
+    if (this.readyState === WebSocket.CLOSED) return;
+    if (this.readyState === WebSocket.CONNECTING) {
+      const msg = 'WebSocket was closed before the connection was established';
+      abortHandshake(this, this._req, msg);
+      return;
+    }
+
+    if (this._socket) {
+      this._readyState = WebSocket.CLOSING;
+      this._socket.destroy();
+    }
+  }
+}
+
+/**
+ * @constant {Number} CONNECTING
+ * @memberof WebSocket
+ */
+Object.defineProperty(WebSocket, 'CONNECTING', {
+  enumerable: true,
+  value: readyStates.indexOf('CONNECTING')
+});
+
+/**
+ * @constant {Number} CONNECTING
+ * @memberof WebSocket.prototype
+ */
+Object.defineProperty(WebSocket.prototype, 'CONNECTING', {
+  enumerable: true,
+  value: readyStates.indexOf('CONNECTING')
+});
+
+/**
+ * @constant {Number} OPEN
+ * @memberof WebSocket
+ */
+Object.defineProperty(WebSocket, 'OPEN', {
+  enumerable: true,
+  value: readyStates.indexOf('OPEN')
+});
+
+/**
+ * @constant {Number} OPEN
+ * @memberof WebSocket.prototype
+ */
+Object.defineProperty(WebSocket.prototype, 'OPEN', {
+  enumerable: true,
+  value: readyStates.indexOf('OPEN')
+});
+
+/**
+ * @constant {Number} CLOSING
+ * @memberof WebSocket
+ */
+Object.defineProperty(WebSocket, 'CLOSING', {
+  enumerable: true,
+  value: readyStates.indexOf('CLOSING')
+});
+
+/**
+ * @constant {Number} CLOSING
+ * @memberof WebSocket.prototype
+ */
+Object.defineProperty(WebSocket.prototype, 'CLOSING', {
+  enumerable: true,
+  value: readyStates.indexOf('CLOSING')
+});
+
+/**
+ * @constant {Number} CLOSED
+ * @memberof WebSocket
+ */
+Object.defineProperty(WebSocket, 'CLOSED', {
+  enumerable: true,
+  value: readyStates.indexOf('CLOSED')
+});
+
+/**
+ * @constant {Number} CLOSED
+ * @memberof WebSocket.prototype
+ */
+Object.defineProperty(WebSocket.prototype, 'CLOSED', {
+  enumerable: true,
+  value: readyStates.indexOf('CLOSED')
+});
+
+[
+  'binaryType',
+  'bufferedAmount',
+  'extensions',
+  'isPaused',
+  'protocol',
+  'readyState',
+  'url'
+].forEach((property) => {
+  Object.defineProperty(WebSocket.prototype, property, { enumerable: true });
+});
+
+//
+// Add the `onopen`, `onerror`, `onclose`, and `onmessage` attributes.
+// See https://html.spec.whatwg.org/multipage/comms.html#the-websocket-interface
+//
+['open', 'error', 'close', 'message'].forEach((method) => {
+  Object.defineProperty(WebSocket.prototype, `on${method}`, {
+    enumerable: true,
+    get() {
+      for (const listener of this.listeners(method)) {
+        if (listener[kForOnEventAttribute]) return listener[kListener];
+      }
+
+      return null;
+    },
+    set(handler) {
+      for (const listener of this.listeners(method)) {
+        if (listener[kForOnEventAttribute]) {
+          this.removeListener(method, listener);
+          break;
+        }
+      }
+
+      if (typeof handler !== 'function') return;
+
+      this.addEventListener(method, handler, {
+        [kForOnEventAttribute]: true
+      });
+    }
+  });
+});
+
+WebSocket.prototype.addEventListener = addEventListener;
+WebSocket.prototype.removeEventListener = removeEventListener;
+
+module.exports = WebSocket;
+
+/**
+ * Initialize a WebSocket client.
+ *
+ * @param {WebSocket} websocket The client to initialize
+ * @param {(String|URL)} address The URL to which to connect
+ * @param {Array} protocols The subprotocols
+ * @param {Object} [options] Connection options
+ * @param {Boolean} [options.allowSynchronousEvents=true] Specifies whether any
+ *     of the `'message'`, `'ping'`, and `'pong'` events can be emitted multiple
+ *     times in the same tick
+ * @param {Boolean} [options.autoPong=true] Specifies whether or not to
+ *     automatically send a pong in response to a ping
+ * @param {Number} [options.closeTimeout=30000] Duration in milliseconds to wait
+ *     for the closing handshake to finish after `websocket.close()` is called
+ * @param {Function} [options.finishRequest] A function which can be used to
+ *     customize the headers of each http request before it is sent
+ * @param {Boolean} [options.followRedirects=false] Whether or not to follow
+ *     redirects
+ * @param {Function} [options.generateMask] The function used to generate the
+ *     masking key
+ * @param {Number} [options.handshakeTimeout] Timeout in milliseconds for the
+ *     handshake request
+ * @param {Number} [options.maxPayload=104857600] The maximum allowed message
+ *     size
+ * @param {Number} [options.maxRedirects=10] The maximum number of redirects
+ *     allowed
+ * @param {String} [options.origin] Value of the `Origin` or
+ *     `Sec-WebSocket-Origin` header
+ * @param {(Boolean|Object)} [options.perMessageDeflate=true] Enable/disable
+ *     permessage-deflate
+ * @param {Number} [options.protocolVersion=13] Value of the
+ *     `Sec-WebSocket-Version` header
+ * @param {Boolean} [options.skipUTF8Validation=false] Specifies whether or
+ *     not to skip UTF-8 validation for text and close messages
+ * @private
+ */
+function initAsClient(websocket, address, protocols, options) {
+  const opts = {
+    allowSynchronousEvents: true,
+    autoPong: true,
+    closeTimeout: CLOSE_TIMEOUT,
+    protocolVersion: protocolVersions[1],
+    maxPayload: 100 * 1024 * 1024,
+    skipUTF8Validation: false,
+    perMessageDeflate: true,
+    followRedirects: false,
+    maxRedirects: 10,
+    ...options,
+    socketPath: undefined,
+    hostname: undefined,
+    protocol: undefined,
+    timeout: undefined,
+    method: 'GET',
+    host: undefined,
+    path: undefined,
+    port: undefined
+  };
+
+  websocket._autoPong = opts.autoPong;
+  websocket._closeTimeout = opts.closeTimeout;
+
+  if (!protocolVersions.includes(opts.protocolVersion)) {
+    throw new RangeError(
+      `Unsupported protocol version: ${opts.protocolVersion} ` +
+        `(supported versions: ${protocolVersions.join(', ')})`
+    );
+  }
+
+  let parsedUrl;
+
+  if (address instanceof URL) {
+    parsedUrl = address;
+  } else {
+    try {
+      parsedUrl = new URL(address);
+    } catch {
+      throw new SyntaxError(`Invalid URL: ${address}`);
+    }
+  }
+
+  if (parsedUrl.protocol === 'http:') {
+    parsedUrl.protocol = 'ws:';
+  } else if (parsedUrl.protocol === 'https:') {
+    parsedUrl.protocol = 'wss:';
+  }
+
+  websocket._url = parsedUrl.href;
+
+  const isSecure = parsedUrl.protocol === 'wss:';
+  const isIpcUrl = parsedUrl.protocol === 'ws+unix:';
+  let invalidUrlMessage;
+
+  if (parsedUrl.protocol !== 'ws:' && !isSecure && !isIpcUrl) {
+    invalidUrlMessage =
+      'The URL\'s protocol must be one of "ws:", "wss:", ' +
+      '"http:", "https:", or "ws+unix:"';
+  } else if (isIpcUrl && !parsedUrl.pathname) {
+    invalidUrlMessage = "The URL's pathname is empty";
+  } else if (parsedUrl.hash) {
+    invalidUrlMessage = 'The URL contains a fragment identifier';
+  }
+
+  if (invalidUrlMessage) {
+    const err = new SyntaxError(invalidUrlMessage);
+
+    if (websocket._redirects === 0) {
+      throw err;
+    } else {
+      emitErrorAndClose(websocket, err);
+      return;
+    }
+  }
+
+  const defaultPort = isSecure ? 443 : 80;
+  const key = randomBytes(16).toString('base64');
+  const request = isSecure ? https.request : http.request;
+  const protocolSet = new Set();
+  let perMessageDeflate;
+
+  opts.createConnection =
+    opts.createConnection || (isSecure ? tlsConnect : netConnect);
+  opts.defaultPort = opts.defaultPort || defaultPort;
+  opts.port = parsedUrl.port || defaultPort;
+  opts.host = parsedUrl.hostname.startsWith('[')
+    ? parsedUrl.hostname.slice(1, -1)
+    : parsedUrl.hostname;
+  opts.headers = {
+    ...opts.headers,
+    'Sec-WebSocket-Version': opts.protocolVersion,
+    'Sec-WebSocket-Key': key,
+    Connection: 'Upgrade',
+    Upgrade: 'websocket'
+  };
+  opts.path = parsedUrl.pathname + parsedUrl.search;
+  opts.timeout = opts.handshakeTimeout;
+
+  if (opts.perMessageDeflate) {
+    perMessageDeflate = new PerMessageDeflate({
+      ...opts.perMessageDeflate,
+      isServer: false,
+      maxPayload: opts.maxPayload
+    });
+    opts.headers['Sec-WebSocket-Extensions'] = format({
+      [PerMessageDeflate.extensionName]: perMessageDeflate.offer()
+    });
+  }
+  if (protocols.length) {
+    for (const protocol of protocols) {
+      if (
+        typeof protocol !== 'string' ||
+        !subprotocolRegex.test(protocol) ||
+        protocolSet.has(protocol)
+      ) {
+        throw new SyntaxError(
+          'An invalid or duplicated subprotocol was specified'
+        );
+      }
+
+      protocolSet.add(protocol);
+    }
+
+    opts.headers['Sec-WebSocket-Protocol'] = protocols.join(',');
+  }
+  if (opts.origin) {
+    if (opts.protocolVersion < 13) {
+      opts.headers['Sec-WebSocket-Origin'] = opts.origin;
+    } else {
+      opts.headers.Origin = opts.origin;
+    }
+  }
+  if (parsedUrl.username || parsedUrl.password) {
+    opts.auth = `${parsedUrl.username}:${parsedUrl.password}`;
+  }
+
+  if (isIpcUrl) {
+    const parts = opts.path.split(':');
+
+    opts.socketPath = parts[0];
+    opts.path = parts[1];
+  }
+
+  let req;
+
+  if (opts.followRedirects) {
+    if (websocket._redirects === 0) {
+      websocket._originalIpc = isIpcUrl;
+      websocket._originalSecure = isSecure;
+      websocket._originalHostOrSocketPath = isIpcUrl
+        ? opts.socketPath
+        : parsedUrl.host;
+
+      const headers = options && options.headers;
+
+      //
+      // Shallow copy the user provided options so that headers can be changed
+      // without mutating the original object.
+      //
+      options = { ...options, headers: {} };
+
+      if (headers) {
+        for (const [key, value] of Object.entries(headers)) {
+          options.headers[key.toLowerCase()] = value;
+        }
+      }
+    } else if (websocket.listenerCount('redirect') === 0) {
+      const isSameHost = isIpcUrl
+        ? websocket._originalIpc
+          ? opts.socketPath === websocket._originalHostOrSocketPath
+          : false
+        : websocket._originalIpc
+          ? false
+          : parsedUrl.host === websocket._originalHostOrSocketPath;
+
+      if (!isSameHost || (websocket._originalSecure && !isSecure)) {
+        //
+        // Match curl 7.77.0 behavior and drop the following headers. These
+        // headers are also dropped when following a redirect to a subdomain.
+        //
+        delete opts.headers.authorization;
+        delete opts.headers.cookie;
+
+        if (!isSameHost) delete opts.headers.host;
+
+        opts.auth = undefined;
+      }
+    }
+
+    //
+    // Match curl 7.77.0 behavior and make the first `Authorization` header win.
+    // If the `Authorization` header is set, then there is nothing to do as it
+    // will take precedence.
+    //
+    if (opts.auth && !options.headers.authorization) {
+      options.headers.authorization =
+        'Basic ' + Buffer.from(opts.auth).toString('base64');
+    }
+
+    req = websocket._req = request(opts);
+
+    if (websocket._redirects) {
+      //
+      // Unlike what is done for the `'upgrade'` event, no early exit is
+      // triggered here if the user calls `websocket.close()` or
+      // `websocket.terminate()` from a listener of the `'redirect'` event. This
+      // is because the user can also call `request.destroy()` with an error
+      // before calling `websocket.close()` or `websocket.terminate()` and this
+      // would result in an error being emitted on the `request` object with no
+      // `'error'` event listeners attached.
+      //
+      websocket.emit('redirect', websocket.url, req);
+    }
+  } else {
+    req = websocket._req = request(opts);
+  }
+
+  if (opts.timeout) {
+    req.on('timeout', () => {
+      abortHandshake(websocket, req, 'Opening handshake has timed out');
+    });
+  }
+
+  req.on('error', (err) => {
+    if (req === null || req[kAborted]) return;
+
+    req = websocket._req = null;
+    emitErrorAndClose(websocket, err);
+  });
+
+  req.on('response', (res) => {
+    const location = res.headers.location;
+    const statusCode = res.statusCode;
+
+    if (
+      location &&
+      opts.followRedirects &&
+      statusCode >= 300 &&
+      statusCode < 400
+    ) {
+      if (++websocket._redirects > opts.maxRedirects) {
+        abortHandshake(websocket, req, 'Maximum redirects exceeded');
+        return;
+      }
+
+      req.abort();
+
+      let addr;
+
+      try {
+        addr = new URL(location, address);
+      } catch (e) {
+        const err = new SyntaxError(`Invalid URL: ${location}`);
+        emitErrorAndClose(websocket, err);
+        return;
+      }
+
+      initAsClient(websocket, addr, protocols, options);
+    } else if (!websocket.emit('unexpected-response', req, res)) {
+      abortHandshake(
+        websocket,
+        req,
+        `Unexpected server response: ${res.statusCode}`
+      );
+    }
+  });
+
+  req.on('upgrade', (res, socket, head) => {
+    websocket.emit('upgrade', res);
+
+    //
+    // The user may have closed the connection from a listener of the
+    // `'upgrade'` event.
+    //
+    if (websocket.readyState !== WebSocket.CONNECTING) return;
+
+    req = websocket._req = null;
+
+    const upgrade = res.headers.upgrade;
+
+    if (upgrade === undefined || upgrade.toLowerCase() !== 'websocket') {
+      abortHandshake(websocket, socket, 'Invalid Upgrade header');
+      return;
+    }
+
+    const digest = createHash('sha1')
+      .update(key + GUID)
+      .digest('base64');
+
+    if (res.headers['sec-websocket-accept'] !== digest) {
+      abortHandshake(websocket, socket, 'Invalid Sec-WebSocket-Accept header');
+      return;
+    }
+
+    const serverProt = res.headers['sec-websocket-protocol'];
+    let protError;
+
+    if (serverProt !== undefined) {
+      if (!protocolSet.size) {
+        protError = 'Server sent a subprotocol but none was requested';
+      } else if (!protocolSet.has(serverProt)) {
+        protError = 'Server sent an invalid subprotocol';
+      }
+    } else if (protocolSet.size) {
+      protError = 'Server sent no subprotocol';
+    }
+
+    if (protError) {
+      abortHandshake(websocket, socket, protError);
+      return;
+    }
+
+    if (serverProt) websocket._protocol = serverProt;
+
+    const secWebSocketExtensions = res.headers['sec-websocket-extensions'];
+
+    if (secWebSocketExtensions !== undefined) {
+      if (!perMessageDeflate) {
+        const message =
+          'Server sent a Sec-WebSocket-Extensions header but no extension ' +
+          'was requested';
+        abortHandshake(websocket, socket, message);
+        return;
+      }
+
+      let extensions;
+
+      try {
+        extensions = parse(secWebSocketExtensions);
+      } catch (err) {
+        const message = 'Invalid Sec-WebSocket-Extensions header';
+        abortHandshake(websocket, socket, message);
+        return;
+      }
+
+      const extensionNames = Object.keys(extensions);
+
+      if (
+        extensionNames.length !== 1 ||
+        extensionNames[0] !== PerMessageDeflate.extensionName
+      ) {
+        const message = 'Server indicated an extension that was not requested';
+        abortHandshake(websocket, socket, message);
+        return;
+      }
+
+      try {
+        perMessageDeflate.accept(extensions[PerMessageDeflate.extensionName]);
+      } catch (err) {
+        const message = 'Invalid Sec-WebSocket-Extensions header';
+        abortHandshake(websocket, socket, message);
+        return;
+      }
+
+      websocket._extensions[PerMessageDeflate.extensionName] =
+        perMessageDeflate;
+    }
+
+    websocket.setSocket(socket, head, {
+      allowSynchronousEvents: opts.allowSynchronousEvents,
+      generateMask: opts.generateMask,
+      maxPayload: opts.maxPayload,
+      skipUTF8Validation: opts.skipUTF8Validation
+    });
+  });
+
+  if (opts.finishRequest) {
+    opts.finishRequest(req, websocket);
+  } else {
+    req.end();
+  }
+}
+
+/**
+ * Emit the `'error'` and `'close'` events.
+ *
+ * @param {WebSocket} websocket The WebSocket instance
+ * @param {Error} The error to emit
+ * @private
+ */
+function emitErrorAndClose(websocket, err) {
+  websocket._readyState = WebSocket.CLOSING;
+  //
+  // The following assignment is practically useless and is done only for
+  // consistency.
+  //
+  websocket._errorEmitted = true;
+  websocket.emit('error', err);
+  websocket.emitClose();
+}
+
+/**
+ * Create a `net.Socket` and initiate a connection.
+ *
+ * @param {Object} options Connection options
+ * @return {net.Socket} The newly created socket used to start the connection
+ * @private
+ */
+function netConnect(options) {
+  options.path = options.socketPath;
+  return net.connect(options);
+}
+
+/**
+ * Create a `tls.TLSSocket` and initiate a connection.
+ *
+ * @param {Object} options Connection options
+ * @return {tls.TLSSocket} The newly created socket used to start the connection
+ * @private
+ */
+function tlsConnect(options) {
+  options.path = undefined;
+
+  if (!options.servername && options.servername !== '') {
+    options.servername = net.isIP(options.host) ? '' : options.host;
+  }
+
+  return tls.connect(options);
+}
+
+/**
+ * Abort the handshake and emit an error.
+ *
+ * @param {WebSocket} websocket The WebSocket instance
+ * @param {(http.ClientRequest|net.Socket|tls.Socket)} stream The request to
+ *     abort or the socket to destroy
+ * @param {String} message The error message
+ * @private
+ */
+function abortHandshake(websocket, stream, message) {
+  websocket._readyState = WebSocket.CLOSING;
+
+  const err = new Error(message);
+  Error.captureStackTrace(err, abortHandshake);
+
+  if (stream.setHeader) {
+    stream[kAborted] = true;
+    stream.abort();
+
+    if (stream.socket && !stream.socket.destroyed) {
+      //
+      // On Node.js >= 14.3.0 `request.abort()` does not destroy the socket if
+      // called after the request completed. See
+      // https://github.com/websockets/ws/issues/1869.
+      //
+      stream.socket.destroy();
+    }
+
+    process.nextTick(emitErrorAndClose, websocket, err);
+  } else {
+    stream.destroy(err);
+    stream.once('error', websocket.emit.bind(websocket, 'error'));
+    stream.once('close', websocket.emitClose.bind(websocket));
+  }
+}
+
+/**
+ * Handle cases where the `ping()`, `pong()`, or `send()` methods are called
+ * when the `readyState` attribute is `CLOSING` or `CLOSED`.
+ *
+ * @param {WebSocket} websocket The WebSocket instance
+ * @param {*} [data] The data to send
+ * @param {Function} [cb] Callback
+ * @private
+ */
+function sendAfterClose(websocket, data, cb) {
+  if (data) {
+    const length = isBlob(data) ? data.size : toBuffer(data).length;
+
+    //
+    // The `_bufferedAmount` property is used only when the peer is a client and
+    // the opening handshake fails. Under these circumstances, in fact, the
+    // `setSocket()` method is not called, so the `_socket` and `_sender`
+    // properties are set to `null`.
+    //
+    if (websocket._socket) websocket._sender._bufferedBytes += length;
+    else websocket._bufferedAmount += length;
+  }
+
+  if (cb) {
+    const err = new Error(
+      `WebSocket is not open: readyState ${websocket.readyState} ` +
+        `(${readyStates[websocket.readyState]})`
+    );
+    process.nextTick(cb, err);
+  }
+}
+
+/**
+ * The listener of the `Receiver` `'conclude'` event.
+ *
+ * @param {Number} code The status code
+ * @param {Buffer} reason The reason for closing
+ * @private
+ */
+function receiverOnConclude(code, reason) {
+  const websocket = this[kWebSocket];
+
+  websocket._closeFrameReceived = true;
+  websocket._closeMessage = reason;
+  websocket._closeCode = code;
+
+  if (websocket._socket[kWebSocket] === undefined) return;
+
+  websocket._socket.removeListener('data', socketOnData);
+  process.nextTick(resume, websocket._socket);
+
+  if (code === 1005) websocket.close();
+  else websocket.close(code, reason);
+}
+
+/**
+ * The listener of the `Receiver` `'drain'` event.
+ *
+ * @private
+ */
+function receiverOnDrain() {
+  const websocket = this[kWebSocket];
+
+  if (!websocket.isPaused) websocket._socket.resume();
+}
+
+/**
+ * The listener of the `Receiver` `'error'` event.
+ *
+ * @param {(RangeError|Error)} err The emitted error
+ * @private
+ */
+function receiverOnError(err) {
+  const websocket = this[kWebSocket];
+
+  if (websocket._socket[kWebSocket] !== undefined) {
+    websocket._socket.removeListener('data', socketOnData);
+
+    //
+    // On Node.js < 14.0.0 the `'error'` event is emitted synchronously. See
+    // https://github.com/websockets/ws/issues/1940.
+    //
+    process.nextTick(resume, websocket._socket);
+
+    websocket.close(err[kStatusCode]);
+  }
+
+  if (!websocket._errorEmitted) {
+    websocket._errorEmitted = true;
+    websocket.emit('error', err);
+  }
+}
+
+/**
+ * The listener of the `Receiver` `'finish'` event.
+ *
+ * @private
+ */
+function receiverOnFinish() {
+  this[kWebSocket].emitClose();
+}
+
+/**
+ * The listener of the `Receiver` `'message'` event.
+ *
+ * @param {Buffer|ArrayBuffer|Buffer[])} data The message
+ * @param {Boolean} isBinary Specifies whether the message is binary or not
+ * @private
+ */
+function receiverOnMessage(data, isBinary) {
+  this[kWebSocket].emit('message', data, isBinary);
+}
+
+/**
+ * The listener of the `Receiver` `'ping'` event.
+ *
+ * @param {Buffer} data The data included in the ping frame
+ * @private
+ */
+function receiverOnPing(data) {
+  const websocket = this[kWebSocket];
+
+  if (websocket._autoPong) websocket.pong(data, !this._isServer, NOOP);
+  websocket.emit('ping', data);
+}
+
+/**
+ * The listener of the `Receiver` `'pong'` event.
+ *
+ * @param {Buffer} data The data included in the pong frame
+ * @private
+ */
+function receiverOnPong(data) {
+  this[kWebSocket].emit('pong', data);
+}
+
+/**
+ * Resume a readable stream
+ *
+ * @param {Readable} stream The readable stream
+ * @private
+ */
+function resume(stream) {
+  stream.resume();
+}
+
+/**
+ * The `Sender` error event handler.
+ *
+ * @param {Error} The error
+ * @private
+ */
+function senderOnError(err) {
+  const websocket = this[kWebSocket];
+
+  if (websocket.readyState === WebSocket.CLOSED) return;
+  if (websocket.readyState === WebSocket.OPEN) {
+    websocket._readyState = WebSocket.CLOSING;
+    setCloseTimer(websocket);
+  }
+
+  //
+  // `socket.end()` is used instead of `socket.destroy()` to allow the other
+  // peer to finish sending queued data. There is no need to set a timer here
+  // because `CLOSING` means that it is already set or not needed.
+  //
+  this._socket.end();
+
+  if (!websocket._errorEmitted) {
+    websocket._errorEmitted = true;
+    websocket.emit('error', err);
+  }
+}
+
+/**
+ * Set a timer to destroy the underlying raw socket of a WebSocket.
+ *
+ * @param {WebSocket} websocket The WebSocket instance
+ * @private
+ */
+function setCloseTimer(websocket) {
+  websocket._closeTimer = setTimeout(
+    websocket._socket.destroy.bind(websocket._socket),
+    websocket._closeTimeout
+  );
+}
+
+/**
+ * The listener of the socket `'close'` event.
+ *
+ * @private
+ */
+function socketOnClose() {
+  const websocket = this[kWebSocket];
+
+  this.removeListener('close', socketOnClose);
+  this.removeListener('data', socketOnData);
+  this.removeListener('end', socketOnEnd);
+
+  websocket._readyState = WebSocket.CLOSING;
+
+  //
+  // The close frame might not have been received or the `'end'` event emitted,
+  // for example, if the socket was destroyed due to an error. Ensure that the
+  // `receiver` stream is closed after writing any remaining buffered data to
+  // it. If the readable side of the socket is in flowing mode then there is no
+  // buffered data as everything has been already written. If instead, the
+  // socket is paused, any possible buffered data will be read as a single
+  // chunk.
+  //
+  if (
+    !this._readableState.endEmitted &&
+    !websocket._closeFrameReceived &&
+    !websocket._receiver._writableState.errorEmitted &&
+    this._readableState.length !== 0
+  ) {
+    const chunk = this.read(this._readableState.length);
+
+    websocket._receiver.write(chunk);
+  }
+
+  websocket._receiver.end();
+
+  this[kWebSocket] = undefined;
+
+  clearTimeout(websocket._closeTimer);
+
+  if (
+    websocket._receiver._writableState.finished ||
+    websocket._receiver._writableState.errorEmitted
+  ) {
+    websocket.emitClose();
+  } else {
+    websocket._receiver.on('error', receiverOnFinish);
+    websocket._receiver.on('finish', receiverOnFinish);
+  }
+}
+
+/**
+ * The listener of the socket `'data'` event.
+ *
+ * @param {Buffer} chunk A chunk of data
+ * @private
+ */
+function socketOnData(chunk) {
+  if (!this[kWebSocket]._receiver.write(chunk)) {
+    this.pause();
+  }
+}
+
+/**
+ * The listener of the socket `'end'` event.
+ *
+ * @private
+ */
+function socketOnEnd() {
+  const websocket = this[kWebSocket];
+
+  websocket._readyState = WebSocket.CLOSING;
+  websocket._receiver.end();
+  this.end();
+}
+
+/**
+ * The listener of the socket `'error'` event.
+ *
+ * @private
+ */
+function socketOnError() {
+  const websocket = this[kWebSocket];
+
+  this.removeListener('error', socketOnError);
+  this.on('error', NOOP);
+
+  if (websocket) {
+    websocket._readyState = WebSocket.CLOSING;
+    this.destroy();
+  }
+}
diff --git a/mqtt-backend/node_modules/ws/package.json b/mqtt-backend/node_modules/ws/package.json
new file mode 100644
index 0000000..3618050
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/package.json
@@ -0,0 +1,70 @@
+{
+  "name": "ws",
+  "version": "8.20.0",
+  "description": "Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js",
+  "keywords": [
+    "HyBi",
+    "Push",
+    "RFC-6455",
+    "WebSocket",
+    "WebSockets",
+    "real-time"
+  ],
+  "homepage": "https://github.com/websockets/ws",
+  "bugs": "https://github.com/websockets/ws/issues",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/websockets/ws.git"
+  },
+  "author": "Einar Otto Stangvik <einaros@gmail.com> (http://2x.io)",
+  "license": "MIT",
+  "main": "index.js",
+  "exports": {
+    ".": {
+      "browser": "./browser.js",
+      "import": "./wrapper.mjs",
+      "require": "./index.js"
+    },
+    "./package.json": "./package.json"
+  },
+  "browser": "browser.js",
+  "engines": {
+    "node": ">=10.0.0"
+  },
+  "files": [
+    "browser.js",
+    "index.js",
+    "lib/*.js",
+    "wrapper.mjs"
+  ],
+  "scripts": {
+    "test": "nyc --reporter=lcov --reporter=text mocha --throw-deprecation test/*.test.js",
+    "integration": "mocha --throw-deprecation test/*.integration.js",
+    "lint": "eslint . && prettier --check --ignore-path .gitignore \"**/*.{json,md,yaml,yml}\""
+  },
+  "peerDependencies": {
+    "bufferutil": "^4.0.1",
+    "utf-8-validate": ">=5.0.2"
+  },
+  "peerDependenciesMeta": {
+    "bufferutil": {
+      "optional": true
+    },
+    "utf-8-validate": {
+      "optional": true
+    }
+  },
+  "devDependencies": {
+    "@eslint/js": "^10.0.1",
+    "benchmark": "^2.1.4",
+    "bufferutil": "^4.0.1",
+    "eslint": "^10.0.1",
+    "eslint-config-prettier": "^10.0.1",
+    "eslint-plugin-prettier": "^5.0.0",
+    "globals": "^17.0.0",
+    "mocha": "^8.4.0",
+    "nyc": "^15.0.0",
+    "prettier": "^3.0.0",
+    "utf-8-validate": "^6.0.0"
+  }
+}
diff --git a/mqtt-backend/node_modules/ws/wrapper.mjs b/mqtt-backend/node_modules/ws/wrapper.mjs
new file mode 100644
index 0000000..a8ffabb
--- /dev/null
+++ b/mqtt-backend/node_modules/ws/wrapper.mjs
@@ -0,0 +1,21 @@
+import createWebSocketStream from './lib/stream.js';
+import extension from './lib/extension.js';
+import PerMessageDeflate from './lib/permessage-deflate.js';
+import Receiver from './lib/receiver.js';
+import Sender from './lib/sender.js';
+import subprotocol from './lib/subprotocol.js';
+import WebSocket from './lib/websocket.js';
+import WebSocketServer from './lib/websocket-server.js';
+
+export {
+  createWebSocketStream,
+  extension,
+  PerMessageDeflate,
+  Receiver,
+  Sender,
+  subprotocol,
+  WebSocket,
+  WebSocketServer
+};
+
+export default WebSocket;
diff --git a/mqtt-backend/node_modules/xtend/.jshintrc b/mqtt-backend/node_modules/xtend/.jshintrc
new file mode 100644
index 0000000..77887b5
--- /dev/null
+++ b/mqtt-backend/node_modules/xtend/.jshintrc
@@ -0,0 +1,30 @@
+{
+    "maxdepth": 4,
+    "maxstatements": 200,
+    "maxcomplexity": 12,
+    "maxlen": 80,
+    "maxparams": 5,
+
+    "curly": true,
+    "eqeqeq": true,
+    "immed": true,
+    "latedef": false,
+    "noarg": true,
+    "noempty": true,
+    "nonew": true,
+    "undef": true,
+    "unused": "vars",
+    "trailing": true,
+
+    "quotmark": true,
+    "expr": true,
+    "asi": true,
+
+    "browser": false,
+    "esnext": true,
+    "devel": false,
+    "node": false,
+    "nonstandard": false,
+
+    "predef": ["require", "module", "__dirname", "__filename"]
+}
diff --git a/mqtt-backend/node_modules/xtend/LICENSE b/mqtt-backend/node_modules/xtend/LICENSE
new file mode 100644
index 0000000..0099f4f
--- /dev/null
+++ b/mqtt-backend/node_modules/xtend/LICENSE
@@ -0,0 +1,20 @@
+The MIT License (MIT)
+Copyright (c) 2012-2014 Raynos.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/mqtt-backend/node_modules/xtend/README.md b/mqtt-backend/node_modules/xtend/README.md
new file mode 100644
index 0000000..4a2703c
--- /dev/null
+++ b/mqtt-backend/node_modules/xtend/README.md
@@ -0,0 +1,32 @@
+# xtend
+
+[![browser support][3]][4]
+
+[![locked](http://badges.github.io/stability-badges/dist/locked.svg)](http://github.com/badges/stability-badges)
+
+Extend like a boss
+
+xtend is a basic utility library which allows you to extend an object by appending all of the properties from each object in a list. When there are identical properties, the right-most property takes precedence.
+
+## Examples
+
+```js
+var extend = require("xtend")
+
+// extend returns a new object. Does not mutate arguments
+var combination = extend({
+    a: "a",
+    b: "c"
+}, {
+    b: "b"
+})
+// { a: "a", b: "b" }
+```
+
+## Stability status: Locked
+
+## MIT Licensed 
+
+
+  [3]: http://ci.testling.com/Raynos/xtend.png
+  [4]: http://ci.testling.com/Raynos/xtend
diff --git a/mqtt-backend/node_modules/xtend/immutable.js b/mqtt-backend/node_modules/xtend/immutable.js
new file mode 100644
index 0000000..94889c9
--- /dev/null
+++ b/mqtt-backend/node_modules/xtend/immutable.js
@@ -0,0 +1,19 @@
+module.exports = extend
+
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+function extend() {
+    var target = {}
+
+    for (var i = 0; i < arguments.length; i++) {
+        var source = arguments[i]
+
+        for (var key in source) {
+            if (hasOwnProperty.call(source, key)) {
+                target[key] = source[key]
+            }
+        }
+    }
+
+    return target
+}
diff --git a/mqtt-backend/node_modules/xtend/mutable.js b/mqtt-backend/node_modules/xtend/mutable.js
new file mode 100644
index 0000000..72debed
--- /dev/null
+++ b/mqtt-backend/node_modules/xtend/mutable.js
@@ -0,0 +1,17 @@
+module.exports = extend
+
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+function extend(target) {
+    for (var i = 1; i < arguments.length; i++) {
+        var source = arguments[i]
+
+        for (var key in source) {
+            if (hasOwnProperty.call(source, key)) {
+                target[key] = source[key]
+            }
+        }
+    }
+
+    return target
+}
diff --git a/mqtt-backend/node_modules/xtend/package.json b/mqtt-backend/node_modules/xtend/package.json
new file mode 100644
index 0000000..f7a39d1
--- /dev/null
+++ b/mqtt-backend/node_modules/xtend/package.json
@@ -0,0 +1,55 @@
+{
+  "name": "xtend",
+  "version": "4.0.2",
+  "description": "extend like a boss",
+  "keywords": [
+    "extend",
+    "merge",
+    "options",
+    "opts",
+    "object",
+    "array"
+  ],
+  "author": "Raynos <raynos2@gmail.com>",
+  "repository": "git://github.com/Raynos/xtend.git",
+  "main": "immutable",
+  "scripts": {
+    "test": "node test"
+  },
+  "dependencies": {},
+  "devDependencies": {
+    "tape": "~1.1.0"
+  },
+  "homepage": "https://github.com/Raynos/xtend",
+  "contributors": [
+    {
+      "name": "Jake Verbaten"
+    },
+    {
+      "name": "Matt Esch"
+    }
+  ],
+  "bugs": {
+    "url": "https://github.com/Raynos/xtend/issues",
+    "email": "raynos2@gmail.com"
+  },
+  "license": "MIT",
+  "testling": {
+    "files": "test.js",
+    "browsers": [
+      "ie/7..latest",
+      "firefox/16..latest",
+      "firefox/nightly",
+      "chrome/22..latest",
+      "chrome/canary",
+      "opera/12..latest",
+      "opera/next",
+      "safari/5.1..latest",
+      "ipad/6.0..latest",
+      "iphone/6.0..latest"
+    ]
+  },
+  "engines": {
+    "node": ">=0.4"
+  }
+}
diff --git a/mqtt-backend/node_modules/xtend/test.js b/mqtt-backend/node_modules/xtend/test.js
new file mode 100644
index 0000000..b895b42
--- /dev/null
+++ b/mqtt-backend/node_modules/xtend/test.js
@@ -0,0 +1,103 @@
+var test = require("tape")
+var extend = require("./")
+var mutableExtend = require("./mutable")
+
+test("merge", function(assert) {
+    var a = { a: "foo" }
+    var b = { b: "bar" }
+
+    assert.deepEqual(extend(a, b), { a: "foo", b: "bar" })
+    assert.end()
+})
+
+test("replace", function(assert) {
+    var a = { a: "foo" }
+    var b = { a: "bar" }
+
+    assert.deepEqual(extend(a, b), { a: "bar" })
+    assert.end()
+})
+
+test("undefined", function(assert) {
+    var a = { a: undefined }
+    var b = { b: "foo" }
+
+    assert.deepEqual(extend(a, b), { a: undefined, b: "foo" })
+    assert.deepEqual(extend(b, a), { a: undefined, b: "foo" })
+    assert.end()
+})
+
+test("handle 0", function(assert) {
+    var a = { a: "default" }
+    var b = { a: 0 }
+
+    assert.deepEqual(extend(a, b), { a: 0 })
+    assert.deepEqual(extend(b, a), { a: "default" })
+    assert.end()
+})
+
+test("is immutable", function (assert) {
+    var record = {}
+
+    extend(record, { foo: "bar" })
+    assert.equal(record.foo, undefined)
+    assert.end()
+})
+
+test("null as argument", function (assert) {
+    var a = { foo: "bar" }
+    var b = null
+    var c = void 0
+
+    assert.deepEqual(extend(b, a, c), { foo: "bar" })
+    assert.end()
+})
+
+test("mutable", function (assert) {
+    var a = { foo: "bar" }
+
+    mutableExtend(a, { bar: "baz" })
+
+    assert.equal(a.bar, "baz")
+    assert.end()
+})
+
+test("null prototype", function(assert) {
+    var a = { a: "foo" }
+    var b = Object.create(null)
+    b.b = "bar";
+
+    assert.deepEqual(extend(a, b), { a: "foo", b: "bar" })
+    assert.end()
+})
+
+test("null prototype mutable", function (assert) {
+    var a = { foo: "bar" }
+    var b = Object.create(null)
+    b.bar = "baz";
+
+    mutableExtend(a, b)
+
+    assert.equal(a.bar, "baz")
+    assert.end()
+})
+
+test("prototype pollution", function (assert) {
+    var a = {}
+    var maliciousPayload = '{"__proto__":{"oops":"It works!"}}'
+
+    assert.strictEqual(a.oops, undefined)
+    extend({}, maliciousPayload)
+    assert.strictEqual(a.oops, undefined)
+    assert.end()
+})
+
+test("prototype pollution mutable", function (assert) {
+    var a = {}
+    var maliciousPayload = '{"__proto__":{"oops":"It works!"}}'
+
+    assert.strictEqual(a.oops, undefined)
+    mutableExtend({}, maliciousPayload)
+    assert.strictEqual(a.oops, undefined)
+    assert.end()
+})
diff --git a/mqtt-backend/package-lock.json b/mqtt-backend/package-lock.json
new file mode 100644
index 0000000..f3b549d
--- /dev/null
+++ b/mqtt-backend/package-lock.json
@@ -0,0 +1,870 @@
+{
+  "name": "mqtt-backend",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "mqtt-backend",
+      "version": "1.0.0",
+      "dependencies": {
+        "aedes": "^0.51.0",
+        "mqtt": "^5.3.0"
+      }
+    },
+    "node_modules/@babel/runtime": {
+      "version": "7.29.2",
+      "resolved": "https://registry.npmmirror.com/@babel/runtime/-/runtime-7.29.2.tgz",
+      "integrity": "sha512-JiDShH45zKHWyGe4ZNVRrCjBz8Nh9TMmZG1kh4QTK8hCBTWBi8Da+i7s1fJw7/lYpM4ccepSNfqzZ/QvABBi5g==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@types/node": {
+      "version": "25.6.0",
+      "resolved": "https://registry.npmmirror.com/@types/node/-/node-25.6.0.tgz",
+      "integrity": "sha512-+qIYRKdNYJwY3vRCZMdJbPLJAtGjQBudzZzdzwQYkEPQd+PJGixUL5QfvCLDaULoLv+RhT3LDkwEfKaAkgSmNQ==",
+      "license": "MIT",
+      "dependencies": {
+        "undici-types": "~7.19.0"
+      }
+    },
+    "node_modules/@types/readable-stream": {
+      "version": "4.0.23",
+      "resolved": "https://registry.npmmirror.com/@types/readable-stream/-/readable-stream-4.0.23.tgz",
+      "integrity": "sha512-wwXrtQvbMHxCbBgjHaMGEmImFTQxxpfMOR/ZoQnXxB1woqkUbdLGFDgauo00Py9IudiaqSeiBiulSV9i6XIPig==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
+    "node_modules/@types/ws": {
+      "version": "8.18.1",
+      "resolved": "https://registry.npmmirror.com/@types/ws/-/ws-8.18.1.tgz",
+      "integrity": "sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/node": "*"
+      }
+    },
+    "node_modules/abort-controller": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmmirror.com/abort-controller/-/abort-controller-3.0.0.tgz",
+      "integrity": "sha512-h8lQ8tacZYnR3vNQTgibj+tODHI5/+l06Au2Pcriv/Gmet0eaj4TwWH41sO9wnHDiQsEj19q0drzdWdeAHtweg==",
+      "license": "MIT",
+      "dependencies": {
+        "event-target-shim": "^5.0.0"
+      },
+      "engines": {
+        "node": ">=6.5"
+      }
+    },
+    "node_modules/aedes": {
+      "version": "0.51.3",
+      "resolved": "https://registry.npmmirror.com/aedes/-/aedes-0.51.3.tgz",
+      "integrity": "sha512-aQfiI9w3RbqnowNCdcGMmCtxBFXN9bhJFcuZm24U5/NU06V3MCl42jWK2GUnu8rOypR2Ahi/aEcgq3w7CMcycg==",
+      "license": "MIT",
+      "dependencies": {
+        "aedes-packet": "^3.0.0",
+        "aedes-persistence": "^9.1.2",
+        "end-of-stream": "^1.4.4",
+        "fastfall": "^1.5.1",
+        "fastparallel": "^2.4.1",
+        "fastseries": "^2.0.0",
+        "hyperid": "^3.2.0",
+        "mqemitter": "^6.0.0",
+        "mqtt-packet": "^9.0.0",
+        "retimer": "^4.0.0",
+        "reusify": "^1.0.4",
+        "uuid": "^10.0.0"
+      },
+      "engines": {
+        "node": ">=16"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/aedes"
+      }
+    },
+    "node_modules/aedes-packet": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmmirror.com/aedes-packet/-/aedes-packet-3.0.0.tgz",
+      "integrity": "sha512-swASey0BxGs4/npZGWoiVDmnEyPvVFIRY6l2LVKL4rbiW8IhcIGDLfnb20Qo8U20itXlitAKPQ3MVTEbOGG5ZA==",
+      "license": "MIT",
+      "dependencies": {
+        "mqtt-packet": "^7.0.0"
+      },
+      "engines": {
+        "node": ">=14"
+      }
+    },
+    "node_modules/aedes-packet/node_modules/bl": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmmirror.com/bl/-/bl-4.1.0.tgz",
+      "integrity": "sha512-1W07cM9gS6DcLperZfFSj+bWLtaPGSOHWhPiGzXmvVJbRLdG82sH/Kn8EtW1VqWVA54AKf2h5k5BbnIbwF3h6w==",
+      "license": "MIT",
+      "dependencies": {
+        "buffer": "^5.5.0",
+        "inherits": "^2.0.4",
+        "readable-stream": "^3.4.0"
+      }
+    },
+    "node_modules/aedes-packet/node_modules/mqtt-packet": {
+      "version": "7.1.2",
+      "resolved": "https://registry.npmmirror.com/mqtt-packet/-/mqtt-packet-7.1.2.tgz",
+      "integrity": "sha512-FFZbcZ2omsf4c5TxEQfcX9hI+JzDpDKPT46OmeIBpVA7+t32ey25UNqlqNXTmeZOr5BLsSIERpQQLsFWJS94SQ==",
+      "license": "MIT",
+      "dependencies": {
+        "bl": "^4.0.2",
+        "debug": "^4.1.1",
+        "process-nextick-args": "^2.0.1"
+      }
+    },
+    "node_modules/aedes-packet/node_modules/readable-stream": {
+      "version": "3.6.2",
+      "resolved": "https://registry.npmmirror.com/readable-stream/-/readable-stream-3.6.2.tgz",
+      "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
+      "license": "MIT",
+      "dependencies": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
+    "node_modules/aedes-persistence": {
+      "version": "9.1.2",
+      "resolved": "https://registry.npmmirror.com/aedes-persistence/-/aedes-persistence-9.1.2.tgz",
+      "integrity": "sha512-2Wlr5pwIK0eQOkiTwb8ZF6C20s8UPUlnsJ4kXYePZ3JlQl0NbBA176mzM8wY294BJ5wybpNc9P5XEQxqadRNcQ==",
+      "license": "MIT",
+      "dependencies": {
+        "aedes-packet": "^3.0.0",
+        "qlobber": "^7.0.0"
+      },
+      "engines": {
+        "node": ">=14"
+      }
+    },
+    "node_modules/base64-js": {
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+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "license": "MIT",
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+        "uuid": "dist/bin/uuid"
+      }
+    },
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+      "version": "1.1.0",
+      "resolved": "https://registry.npmmirror.com/uuid-parse/-/uuid-parse-1.1.0.tgz",
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+      "license": "MIT",
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+        "node": ">=0.4"
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+  }
+}
diff --git a/mqtt-backend/package.json b/mqtt-backend/package.json
new file mode 100644
index 0000000..e81e5a8
--- /dev/null
+++ b/mqtt-backend/package.json
@@ -0,0 +1,14 @@
+{
+  "name": "mqtt-backend",
+  "version": "1.0.0",
+  "description": "MQTT Backend Server for Water Quality Monitoring",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js",
+    "dev": "node server.js"
+  },
+  "dependencies": {
+    "aedes": "^0.51.0",
+    "mqtt": "^5.3.0"
+  }
+}
\ No newline at end of file
diff --git a/mqtt-backend/server.js b/mqtt-backend/server.js
new file mode 100644
index 0000000..affa611
--- /dev/null
+++ b/mqtt-backend/server.js
@@ -0,0 +1,92 @@
+/**
+ * MQTT Broker 服务器
+ * 使用 aedes 并配置协议兼容性
+ */
+
+const aedes = require('aedes')({
+  // 兼容所有MQTT协议版本
+  protocolVersion: 4 // 支持 MQTT 5.0，向下兼容 3.1.1 和 3.1
+});
+
+const net = require('net');
+
+// 配置参数
+const PORT = 1883;
+const HOST = '0.0.0.0';
+
+// 简化认证 - 允许所有连接（测试用）
+aedes.authenticate = (client, username, password, callback) => {
+  console.log(`[认证请求] 客户端: ${client.id}, 用户名: ${username || '无'}`);
+  console.log(`[协议版本] ${client.version}`);
+
+  // 测试阶段：允许所有连接
+  callback(null, true);
+};
+
+// 客户端连接事件
+aedes.on('client', (client) => {
+  console.log(`[客户端连接] ${client.id} 已连接`);
+  console.log(`[当前连接数] ${aedes.connectedClients}`);
+});
+
+// 客户端断开事件
+aedes.on('clientDisconnect', (client) => {
+  console.log(`[客户端断开] ${client.id} 已断开`);
+});
+
+// 消息发布事件
+aedes.on('publish', (packet, client) => {
+  if (client) {
+    const payload = packet.payload.toString();
+    console.log(`[消息发布] 主题: ${packet.topic}`);
+    console.log(`[发布者] ${client.id}`);
+    console.log(`[消息内容] ${payload}`);
+
+    try {
+      const data = JSON.parse(payload);
+      console.log(`[水质数据] 温度:${data.temp}°C, pH:${data.ph}, COD:${data.cod}`);
+    } catch (e) {}
+    console.log('---');
+  }
+});
+
+// 订阅事件
+aedes.on('subscribe', (subscriptions, client) => {
+  console.log(`[订阅] 客户端 ${client.id} 订阅了:`);
+  subscriptions.forEach(sub => {
+    console.log(`  - 主题: ${sub.topic}`);
+  });
+});
+
+// 创建TCP服务器
+const server = net.createServer(aedes.handle);
+
+// 启动服务器
+server.listen(PORT, HOST, () => {
+  console.log('========================================');
+  console.log('   MQTT Broker 服务器已启动');
+  console.log('========================================');
+  console.log(`监听地址: mqtt://${HOST}:${PORT}`);
+  console.log(`支持协议: MQTT 3.1 / 3.1.1 / 5.0`);
+  console.log('----------------------------------------');
+  console.log('MQTTX / HarmonyOS 连接配置:');
+  console.log('  - 主机: 192.168.128.190');
+  console.log('  - 端口: 1883');
+  console.log('  - 用户名: admin (可选)');
+  console.log('  - 密码: admin (可选)');
+  console.log('  - 发布主题: sea_status');
+  console.log('========================================');
+});
+
+server.on('error', (err) => {
+  console.error('服务器错误:', err);
+  process.exit(1);
+});
+
+process.on('SIGINT', () => {
+  console.log('\n正在关闭...');
+  aedes.close(() => {
+    server.close();
+    process.exit(0);
+  });
+});
\ No newline at end of file
diff --git a/mqtt-backend/simulator.js b/mqtt-backend/simulator.js
new file mode 100644
index 0000000..37e1d6e
--- /dev/null
+++ b/mqtt-backend/simulator.js
@@ -0,0 +1,117 @@
+/**
+ * MQTT 模拟数据发送器
+ * 用于模拟水质监测设备发送数据
+ *
+ * 使用方法：
+ * 1. 确保MQTT Broker已启动 (node server.js)
+ * 2. 在新终端运行: node simulator.js
+ */
+
+const mqtt = require('mqtt');
+
+// MQTT配置
+const MQTT_CONFIG = {
+  host: 'localhost',
+  port: 1883,
+  username: 'admin',
+  password: 'admin',
+  clientId: 'water-quality-simulator',
+  topic: 'sea_status'
+};
+
+// 水质数据范围配置
+const DATA_RANGES = {
+  temp: { min: 15, max: 30, unit: '°C' },
+  ph: { min: 6.5, max: 8.5, unit: '' },
+  conductivity: { min: 500, max: 1500, unit: 'μS/cm' },
+  cod: { min: 10, max: 40, unit: 'mg/L' },
+  ammoniaNitrogen: { min: 0, max: 1.0, unit: 'mg/L' },
+  residualChlorine: { min: 0.1, max: 0.8, unit: 'mg/L' }
+};
+
+// 发送间隔（毫秒）
+const SEND_INTERVAL = 3000;
+
+// 生成随机水质数据
+function generateWaterQualityData() {
+  const generateValue = (range) => {
+    const value = range.min + Math.random() * (range.max - range.min);
+    return Math.round(value * 100) / 100; // 保留2位小数
+  };
+
+  return {
+    temp: generateValue(DATA_RANGES.temp),
+    ph: generateValue(DATA_RANGES.ph),
+    conductivity: Math.round(generateValue(DATA_RANGES.conductivity)),
+    cod: generateValue(DATA_RANGES.cod),
+    ammoniaNitrogen: generateValue(DATA_RANGES.ammoniaNitrogen),
+    residualChlorine: generateValue(DATA_RANGES.residualChlorine),
+    timestamp: Date.now()
+  };
+}
+
+// 连接MQTT服务器
+const client = mqtt.connect({
+  host: MQTT_CONFIG.host,
+  port: MQTT_CONFIG.port,
+  username: MQTT_CONFIG.username,
+  password: MQTT_CONFIG.password,
+  clientId: MQTT_CONFIG.clientId
+});
+
+// 连接成功
+client.on('connect', () => {
+  console.log('========================================');
+  console.log('   水质数据模拟器已连接');
+  console.log('========================================');
+  console.log(`MQTT服务器: mqtt://${MQTT_CONFIG.host}:${MQTT_CONFIG.port}`);
+  console.log(`发布主题: ${MQTT_CONFIG.topic}`);
+  console.log(`发送间隔: ${SEND_INTERVAL / 1000}秒`);
+  console.log('----------------------------------------');
+  console.log('按 Ctrl+C 停止发送');
+  console.log('========================================\n');
+
+  // 定时发送数据
+  let count = 1;
+  const interval = setInterval(() => {
+    const data = generateWaterQualityData();
+    const payload = JSON.stringify(data);
+
+    client.publish(MQTT_CONFIG.topic, payload, { qos: 0 }, (err) => {
+      if (err) {
+        console.error(`[发送失败] ${err.message}`);
+      } else {
+        console.log(`[第${count}次发送] ${new Date().toLocaleTimeString()}`);
+        console.log(`  温度: ${data.temp} °C`);
+        console.log(`  pH值: ${data.ph}`);
+        console.log(`  电导率: ${data.conductivity} μS/cm`);
+        console.log(`  COD: ${data.cod} mg/L`);
+        console.log(`  氨氮: ${data.ammoniaNitrogen} mg/L`);
+        console.log(`  余氯: ${data.residualChlorine} mg/L`);
+        console.log('---');
+        count++;
+      }
+    });
+  }, SEND_INTERVAL);
+
+  // 处理退出
+  process.on('SIGINT', () => {
+    clearInterval(interval);
+    client.end(() => {
+      console.log('\n模拟器已停止');
+      process.exit(0);
+    });
+  });
+});
+
+// 连接错误
+client.on('error', (err) => {
+  console.error('MQTT连接错误:', err.message);
+  console.error('请确保MQTT Broker正在运行 (node server.js)');
+  process.exit(1);
+});
+
+// 断开连接
+client.on('close', () => {
+  console.log('MQTT连接已断开');
+});
\ No newline at end of file
diff --git a/oh-package-lock.json5 b/oh-package-lock.json5
new file mode 100644
index 0000000..7bf08b6
--- /dev/null
+++ b/oh-package-lock.json5
@@ -0,0 +1,46 @@
+{
+  "meta": {
+    "stableOrder": true,
+    "enableUnifiedLockfile": false
+  },
+  "lockfileVersion": 3,
+  "ATTENTION": "THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.",
+  "specifiers": {
+    "@ohos/hamock@1.0.0": "@ohos/hamock@1.0.0",
+    "@ohos/hypium@1.0.25": "@ohos/hypium@1.0.25",
+    "@ohos/mqtt@^2.0.0": "@ohos/mqtt@2.0.26",
+    "libmqttasync.so@oh_modules/.ohpm/@ohos+mqtt@2.0.26/oh_modules/@ohos/mqtt/src/main/cpp/types/libmqttasync": "libmqttasync.so@oh_modules/.ohpm/@ohos+mqtt@2.0.26/oh_modules/@ohos/mqtt/src/main/cpp/types/libmqttasync"
+  },
+  "packages": {
+    "@ohos/hamock@1.0.0": {
+      "name": "@ohos/hamock",
+      "version": "1.0.0",
+      "integrity": "sha512-K6lDPYc6VkKe6ZBNQa9aoG+ZZMiwqfcR/7yAVFSUGIuOAhPvCJAo9+t1fZnpe0dBRBPxj2bxPPbKh69VuyAtDg==",
+      "resolved": "https://ohpm.openharmony.cn/ohpm/@ohos/hamock/-/hamock-1.0.0.har",
+      "registryType": "ohpm"
+    },
+    "@ohos/hypium@1.0.25": {
+      "name": "@ohos/hypium",
+      "version": "1.0.25",
+      "integrity": "sha512-l6uO2pjl8HyEKdekLqQt7tUpWbDqX/42zoAzkagtUVZAW9jT6lMvbe54MVjoLxq/RwQGygRvi6j4GpypSMFSHw==",
+      "resolved": "https://ohpm.openharmony.cn/ohpm/@ohos/hypium/-/hypium-1.0.25.har",
+      "registryType": "ohpm"
+    },
+    "@ohos/mqtt@2.0.26": {
+      "name": "@ohos/mqtt",
+      "version": "2.0.26",
+      "integrity": "sha512-LQtP+nlBmyIkXFXHZVAvcANCF/pROm5JOoME5N3RzBcHdQURtXOJ7lY4+iZQ0BpIHkzfeYLPsh3smduTf4Lj0A==",
+      "resolved": "https://ohpm.openharmony.cn/ohpm/@ohos/mqtt/-/mqtt-2.0.26.har",
+      "registryType": "ohpm",
+      "dependencies": {
+        "libmqttasync.so": "file:./src/main/cpp/types/libmqttasync"
+      }
+    },
+    "libmqttasync.so@oh_modules/.ohpm/@ohos+mqtt@2.0.26/oh_modules/@ohos/mqtt/src/main/cpp/types/libmqttasync": {
+      "name": "libmqttasync.so",
+      "version": "0.0.0",
+      "resolved": "oh_modules/.ohpm/@ohos+mqtt@2.0.26/oh_modules/@ohos/mqtt/src/main/cpp/types/libmqttasync",
+      "registryType": "local"
+    }
+  }
+}
\ No newline at end of file
diff --git a/oh-package.json5 b/oh-package.json5
new file mode 100644
index 0000000..db4b575
--- /dev/null
+++ b/oh-package.json5
@@ -0,0 +1,11 @@
+{
+  "modelVersion": "6.1.0",
+  "description": "Please describe the basic information.",
+  "dependencies": {
+    "@ohos/mqtt": "^2.0.0"
+  },
+  "devDependencies": {
+    "@ohos/hypium": "1.0.25",
+    "@ohos/hamock": "1.0.0"
+  }
+}
\ No newline at end of file